[PATCH v5 00/14] spi: qup: Fixes and add support for >64k transfers

[PATCH v5 00/14] spi: qup: Fixes and add support for >64k transfers

[Varadarajan Narayanan]

v5:
	Incorporate feedback from Mark Brown and Geert Uytterhoeven

	spi: qup: Enable chip select support
		Update commit log. Include the commit's description

	Removed "spi: qup: Add completion structures for DMA". This
	introduced separate completion structures for DMA based rx/tx
	and FIFO based i/os. This was not needed.

	Added "spi: qup: Fix QUP version identify method" to identify
	qup version using of_device_get_match_data instead of
	of_device_is_compatible.

v4:
	Discard patch #15, 'spi: qup: support for qup v1 dma'.
	This depends on ADM driver, which is not upstreamed yet.

v3:
	Fix git bisect-ability issues in
		spi: qup: Add completion structures for DMA
		spi: qup: Add completion timeout
		spi: qup: Place the QUP in run mode before DMA
		spi: qup: Fix transaction done signaling

v2:
	Incorporate feedback from Andy Gross, Sricharan, Stanimir Varbanov

	Modified the QUP-v1 dma completion sequence to QUP-v2 as per feedback.

	Removed code that used controller->xfer to identify extra interrupts,
	since with the fixes done to handle i/o completion we don't see
	extra interrupts.

v1:
	This series fixes some existing issues in the code for both
	interrupt and dma mode. Patches 1 - 11 are the fixes.
	Random failures/timeout are observed without these fixes.
	Also, the current driver does not support block transfers > 64K
	and the driver quietly fails. Patches 12 - 18 add support for this
	in both interrupt and dma mode.

	The entire series has been tested on ipq4019 with
	SPI-NOR flash for block sizes > 64k.

Varadarajan Narayanan (14):
  spi: qup: Enable chip select support
  spi: qup: Setup DMA mode correctly
  spi: qup: Add completion timeout
  spi: qup: Place the QUP in run mode before DMA
  spi: qup: Fix error handling in spi_qup_prep_sg
  spi: qup: Fix transaction done signaling
  spi: qup: Do block sized read/write in block mode
  spi: qup: refactor spi_qup_io_config into two functions
  spi: qup: call io_config in mode specific function
  spi: qup: allow block mode to generate multiple transactions
  spi: qup: refactor spi_qup_prep_sg
  spi: qup: allow multiple DMA transactions per spi xfer
  spi: qup: Ensure done detection
  spi: qup: Fix QUP version identify method

 drivers/spi/spi-qup.c | 566 ++++++++++++++++++++++++++++++++++----------------
 1 file changed, 392 insertions(+), 174 deletions(-)

-- 
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation

[PATCH v5 01/14] spi: qup: Enable chip select support

[Varadarajan Narayanan]

Enable chip select support for QUP versions later than v1. The
chip select support was broken in QUP version 1. Hence the chip
select support was removed earlier in an earlier commit
(4a8573abe "spi: qup: Remove chip select function"). Since the
chip select support is functional in recent versions of QUP,
re-enabling it for QUP versions later than v1.

Signed-off-by: Sham Muthayyan <smuthayy@codeaurora.org>
Signed-off-by: Varadarajan Narayanan <varada@codeaurora.org>
---
 drivers/spi/spi-qup.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
index 1bfa889..c0d4def 100644
--- a/drivers/spi/spi-qup.c
+++ b/drivers/spi/spi-qup.c
@@ -750,6 +750,24 @@ static int spi_qup_init_dma(struct spi_master *master, resource_size_t base)
 	return ret;
 }
 
+static void spi_qup_set_cs(struct spi_device *spi, bool val)
+{
+	struct spi_qup *controller;
+	u32 spi_ioc;
+	u32 spi_ioc_orig;
+
+	controller = spi_master_get_devdata(spi->master);
+	spi_ioc = readl_relaxed(controller->base + SPI_IO_CONTROL);
+	spi_ioc_orig = spi_ioc;
+	if (!val)
+		spi_ioc |= SPI_IO_C_FORCE_CS;
+	else
+		spi_ioc &= ~SPI_IO_C_FORCE_CS;
+
+	if (spi_ioc != spi_ioc_orig)
+		writel_relaxed(spi_ioc, controller->base + SPI_IO_CONTROL);
+}
+
 static int spi_qup_probe(struct platform_device *pdev)
 {
 	struct spi_master *master;
@@ -846,6 +864,9 @@ static int spi_qup_probe(struct platform_device *pdev)
 	if (of_device_is_compatible(dev->of_node, "qcom,spi-qup-v1.1.1"))
 		controller->qup_v1 = 1;
 
+	if (!controller->qup_v1)
+		master->set_cs = spi_qup_set_cs;
+
 	spin_lock_init(&controller->lock);
 	init_completion(&controller->done);
 
-- 
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation

[PATCH v5 02/14] spi: qup: Setup DMA mode correctly

[Varadarajan Narayanan]

To operate in DMA mode, the buffer should be aligned and
the size of the transfer should be a multiple of block size
(for v1). And the no. of words being transferred should
be programmed in the count registers appropriately.

Signed-off-by: Andy Gross <andy.gross-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
Signed-off-by: Varadarajan Narayanan <varada-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
---
 drivers/spi/spi-qup.c | 118 +++++++++++++++++++++++---------------------------
 1 file changed, 55 insertions(+), 63 deletions(-)

diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
index c0d4def..abe799b 100644
--- a/drivers/spi/spi-qup.c
+++ b/drivers/spi/spi-qup.c
@@ -149,11 +149,18 @@ struct spi_qup {
 	int			rx_bytes;
 	int			qup_v1;
 
-	int			use_dma;
+	int			mode;
 	struct dma_slave_config	rx_conf;
 	struct dma_slave_config	tx_conf;
 };
 
+static inline bool spi_qup_is_dma_xfer(int mode)
+{
+	if (mode == QUP_IO_M_MODE_DMOV || mode == QUP_IO_M_MODE_BAM)
+		return true;
+
+	return false;
+}
 
 static inline bool spi_qup_is_valid_state(struct spi_qup *controller)
 {
@@ -424,7 +431,7 @@ static irqreturn_t spi_qup_qup_irq(int irq, void *dev_id)
 		error = -EIO;
 	}
 
-	if (!controller->use_dma) {
+	if (!spi_qup_is_dma_xfer(controller->mode)) {
 		if (opflags & QUP_OP_IN_SERVICE_FLAG)
 			spi_qup_fifo_read(controller, xfer);
 
@@ -443,34 +450,11 @@ static irqreturn_t spi_qup_qup_irq(int irq, void *dev_id)
 	return IRQ_HANDLED;
 }
 
-static u32
-spi_qup_get_mode(struct spi_master *master, struct spi_transfer *xfer)
-{
-	struct spi_qup *qup = spi_master_get_devdata(master);
-	u32 mode;
-
-	qup->w_size = 4;
-
-	if (xfer->bits_per_word <= 8)
-		qup->w_size = 1;
-	else if (xfer->bits_per_word <= 16)
-		qup->w_size = 2;
-
-	qup->n_words = xfer->len / qup->w_size;
-
-	if (qup->n_words <= (qup->in_fifo_sz / sizeof(u32)))
-		mode = QUP_IO_M_MODE_FIFO;
-	else
-		mode = QUP_IO_M_MODE_BLOCK;
-
-	return mode;
-}
-
 /* set clock freq ... bits per word */
 static int spi_qup_io_config(struct spi_device *spi, struct spi_transfer *xfer)
 {
 	struct spi_qup *controller = spi_master_get_devdata(spi->master);
-	u32 config, iomode, mode, control;
+	u32 config, iomode, control;
 	int ret, n_words;
 
 	if (spi->mode & SPI_LOOP && xfer->len > controller->in_fifo_sz) {
@@ -491,25 +475,30 @@ static int spi_qup_io_config(struct spi_device *spi, struct spi_transfer *xfer)
 		return -EIO;
 	}
 
-	mode = spi_qup_get_mode(spi->master, xfer);
+	controller->w_size = DIV_ROUND_UP(xfer->bits_per_word, 8);
+	controller->n_words = xfer->len / controller->w_size;
 	n_words = controller->n_words;
 
-	if (mode == QUP_IO_M_MODE_FIFO) {
+	if (n_words <= (controller->in_fifo_sz / sizeof(u32))) {
+
+		controller->mode = QUP_IO_M_MODE_FIFO;
+
 		writel_relaxed(n_words, controller->base + QUP_MX_READ_CNT);
 		writel_relaxed(n_words, controller->base + QUP_MX_WRITE_CNT);
 		/* must be zero for FIFO */
 		writel_relaxed(0, controller->base + QUP_MX_INPUT_CNT);
 		writel_relaxed(0, controller->base + QUP_MX_OUTPUT_CNT);
-	} else if (!controller->use_dma) {
+	} else if (spi->master->can_dma &&
+		   spi->master->can_dma(spi->master, spi, xfer) &&
+		   spi->master->cur_msg_mapped) {
+
+		controller->mode = QUP_IO_M_MODE_BAM;
+
 		writel_relaxed(n_words, controller->base + QUP_MX_INPUT_CNT);
 		writel_relaxed(n_words, controller->base + QUP_MX_OUTPUT_CNT);
 		/* must be zero for BLOCK and BAM */
 		writel_relaxed(0, controller->base + QUP_MX_READ_CNT);
 		writel_relaxed(0, controller->base + QUP_MX_WRITE_CNT);
-	} else {
-		mode = QUP_IO_M_MODE_BAM;
-		writel_relaxed(0, controller->base + QUP_MX_READ_CNT);
-		writel_relaxed(0, controller->base + QUP_MX_WRITE_CNT);
 
 		if (!controller->qup_v1) {
 			void __iomem *input_cnt;
@@ -528,19 +517,28 @@ static int spi_qup_io_config(struct spi_device *spi, struct spi_transfer *xfer)
 
 			writel_relaxed(0, controller->base + QUP_MX_OUTPUT_CNT);
 		}
+	} else {
+
+		controller->mode = QUP_IO_M_MODE_BLOCK;
+
+		writel_relaxed(n_words, controller->base + QUP_MX_INPUT_CNT);
+		writel_relaxed(n_words, controller->base + QUP_MX_OUTPUT_CNT);
+		/* must be zero for BLOCK and BAM */
+		writel_relaxed(0, controller->base + QUP_MX_READ_CNT);
+		writel_relaxed(0, controller->base + QUP_MX_WRITE_CNT);
 	}
 
 	iomode = readl_relaxed(controller->base + QUP_IO_M_MODES);
 	/* Set input and output transfer mode */
 	iomode &= ~(QUP_IO_M_INPUT_MODE_MASK | QUP_IO_M_OUTPUT_MODE_MASK);
 
-	if (!controller->use_dma)
+	if (!spi_qup_is_dma_xfer(controller->mode))
 		iomode &= ~(QUP_IO_M_PACK_EN | QUP_IO_M_UNPACK_EN);
 	else
 		iomode |= QUP_IO_M_PACK_EN | QUP_IO_M_UNPACK_EN;
 
-	iomode |= (mode << QUP_IO_M_OUTPUT_MODE_MASK_SHIFT);
-	iomode |= (mode << QUP_IO_M_INPUT_MODE_MASK_SHIFT);
+	iomode |= (controller->mode << QUP_IO_M_OUTPUT_MODE_MASK_SHIFT);
+	iomode |= (controller->mode << QUP_IO_M_INPUT_MODE_MASK_SHIFT);
 
 	writel_relaxed(iomode, controller->base + QUP_IO_M_MODES);
 
@@ -581,7 +579,7 @@ static int spi_qup_io_config(struct spi_device *spi, struct spi_transfer *xfer)
 	config |= xfer->bits_per_word - 1;
 	config |= QUP_CONFIG_SPI_MODE;
 
-	if (controller->use_dma) {
+	if (spi_qup_is_dma_xfer(controller->mode)) {
 		if (!xfer->tx_buf)
 			config |= QUP_CONFIG_NO_OUTPUT;
 		if (!xfer->rx_buf)
@@ -599,7 +597,7 @@ static int spi_qup_io_config(struct spi_device *spi, struct spi_transfer *xfer)
 		 * status change in BAM mode
 		 */
 
-		if (mode == QUP_IO_M_MODE_BAM)
+		if (spi_qup_is_dma_xfer(controller->mode))
 			mask = QUP_OP_IN_SERVICE_FLAG | QUP_OP_OUT_SERVICE_FLAG;
 
 		writel_relaxed(mask, controller->base + QUP_OPERATIONAL_MASK);
@@ -633,7 +631,7 @@ static int spi_qup_transfer_one(struct spi_master *master,
 	controller->tx_bytes = 0;
 	spin_unlock_irqrestore(&controller->lock, flags);
 
-	if (controller->use_dma)
+	if (spi_qup_is_dma_xfer(controller->mode))
 		ret = spi_qup_do_dma(master, xfer);
 	else
 		ret = spi_qup_do_pio(master, xfer);
@@ -641,14 +639,6 @@ static int spi_qup_transfer_one(struct spi_master *master,
 	if (ret)
 		goto exit;
 
-	if (spi_qup_set_state(controller, QUP_STATE_RUN)) {
-		dev_warn(controller->dev, "cannot set EXECUTE state\n");
-		goto exit;
-	}
-
-	if (!wait_for_completion_timeout(&controller->done, timeout))
-		ret = -ETIMEDOUT;
-
 exit:
 	spi_qup_set_state(controller, QUP_STATE_RESET);
 	spin_lock_irqsave(&controller->lock, flags);
@@ -657,7 +647,7 @@ static int spi_qup_transfer_one(struct spi_master *master,
 		ret = controller->error;
 	spin_unlock_irqrestore(&controller->lock, flags);
 
-	if (ret && controller->use_dma)
+	if (ret && spi_qup_is_dma_xfer(controller->mode))
 		spi_qup_dma_terminate(master, xfer);
 
 	return ret;
@@ -668,26 +658,28 @@ static bool spi_qup_can_dma(struct spi_master *master, struct spi_device *spi,
 {
 	struct spi_qup *qup = spi_master_get_devdata(master);
 	size_t dma_align = dma_get_cache_alignment();
-	u32 mode;
-
-	qup->use_dma = 0;
+	int n_words;
 
-	if (xfer->rx_buf && (xfer->len % qup->in_blk_sz ||
-	    IS_ERR_OR_NULL(master->dma_rx) ||
-	    !IS_ALIGNED((size_t)xfer->rx_buf, dma_align)))
-		return false;
+	if (xfer->rx_buf) {
+		if (!IS_ALIGNED((size_t)xfer->rx_buf, dma_align) ||
+		    IS_ERR_OR_NULL(master->dma_rx))
+			return false;
+		if (qup->qup_v1 && (xfer->len % qup->in_blk_sz))
+			return false;
+	}
 
-	if (xfer->tx_buf && (xfer->len % qup->out_blk_sz ||
-	    IS_ERR_OR_NULL(master->dma_tx) ||
-	    !IS_ALIGNED((size_t)xfer->tx_buf, dma_align)))
-		return false;
+	if (xfer->tx_buf) {
+		if (!IS_ALIGNED((size_t)xfer->tx_buf, dma_align) ||
+		    IS_ERR_OR_NULL(master->dma_tx))
+			return false;
+		if (qup->qup_v1 && (xfer->len % qup->out_blk_sz))
+			return false;
+	}
 
-	mode = spi_qup_get_mode(master, xfer);
-	if (mode == QUP_IO_M_MODE_FIFO)
+	n_words = xfer->len / DIV_ROUND_UP(xfer->bits_per_word, 8);
+	if (n_words <= (qup->in_fifo_sz / sizeof(u32)))
 		return false;
 
-	qup->use_dma = 1;
-
 	return true;
 }
 
-- 
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[PATCH v5 02/14] spi: qup: Setup DMA mode correctly

[Varadarajan Narayanan]

To operate in DMA mode, the buffer should be aligned and
the size of the transfer should be a multiple of block size
(for v1). And the no. of words being transferred should
be programmed in the count registers appropriately.

Signed-off-by: Andy Gross <andy.gross@linaro.org>
Signed-off-by: Varadarajan Narayanan <varada@codeaurora.org>
---
 drivers/spi/spi-qup.c | 118 +++++++++++++++++++++++---------------------------
 1 file changed, 55 insertions(+), 63 deletions(-)

diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
index c0d4def..abe799b 100644
--- a/drivers/spi/spi-qup.c
+++ b/drivers/spi/spi-qup.c
@@ -149,11 +149,18 @@ struct spi_qup {
 	int			rx_bytes;
 	int			qup_v1;
 
-	int			use_dma;
+	int			mode;
 	struct dma_slave_config	rx_conf;
 	struct dma_slave_config	tx_conf;
 };
 
+static inline bool spi_qup_is_dma_xfer(int mode)
+{
+	if (mode == QUP_IO_M_MODE_DMOV || mode == QUP_IO_M_MODE_BAM)
+		return true;
+
+	return false;
+}
 
 static inline bool spi_qup_is_valid_state(struct spi_qup *controller)
 {
@@ -424,7 +431,7 @@ static irqreturn_t spi_qup_qup_irq(int irq, void *dev_id)
 		error = -EIO;
 	}
 
-	if (!controller->use_dma) {
+	if (!spi_qup_is_dma_xfer(controller->mode)) {
 		if (opflags & QUP_OP_IN_SERVICE_FLAG)
 			spi_qup_fifo_read(controller, xfer);
 
@@ -443,34 +450,11 @@ static irqreturn_t spi_qup_qup_irq(int irq, void *dev_id)
 	return IRQ_HANDLED;
 }
 
-static u32
-spi_qup_get_mode(struct spi_master *master, struct spi_transfer *xfer)
-{
-	struct spi_qup *qup = spi_master_get_devdata(master);
-	u32 mode;
-
-	qup->w_size = 4;
-
-	if (xfer->bits_per_word <= 8)
-		qup->w_size = 1;
-	else if (xfer->bits_per_word <= 16)
-		qup->w_size = 2;
-
-	qup->n_words = xfer->len / qup->w_size;
-
-	if (qup->n_words <= (qup->in_fifo_sz / sizeof(u32)))
-		mode = QUP_IO_M_MODE_FIFO;
-	else
-		mode = QUP_IO_M_MODE_BLOCK;
-
-	return mode;
-}
-
 /* set clock freq ... bits per word */
 static int spi_qup_io_config(struct spi_device *spi, struct spi_transfer *xfer)
 {
 	struct spi_qup *controller = spi_master_get_devdata(spi->master);
-	u32 config, iomode, mode, control;
+	u32 config, iomode, control;
 	int ret, n_words;
 
 	if (spi->mode & SPI_LOOP && xfer->len > controller->in_fifo_sz) {
@@ -491,25 +475,30 @@ static int spi_qup_io_config(struct spi_device *spi, struct spi_transfer *xfer)
 		return -EIO;
 	}
 
-	mode = spi_qup_get_mode(spi->master, xfer);
+	controller->w_size = DIV_ROUND_UP(xfer->bits_per_word, 8);
+	controller->n_words = xfer->len / controller->w_size;
 	n_words = controller->n_words;
 
-	if (mode == QUP_IO_M_MODE_FIFO) {
+	if (n_words <= (controller->in_fifo_sz / sizeof(u32))) {
+
+		controller->mode = QUP_IO_M_MODE_FIFO;
+
 		writel_relaxed(n_words, controller->base + QUP_MX_READ_CNT);
 		writel_relaxed(n_words, controller->base + QUP_MX_WRITE_CNT);
 		/* must be zero for FIFO */
 		writel_relaxed(0, controller->base + QUP_MX_INPUT_CNT);
 		writel_relaxed(0, controller->base + QUP_MX_OUTPUT_CNT);
-	} else if (!controller->use_dma) {
+	} else if (spi->master->can_dma &&
+		   spi->master->can_dma(spi->master, spi, xfer) &&
+		   spi->master->cur_msg_mapped) {
+
+		controller->mode = QUP_IO_M_MODE_BAM;
+
 		writel_relaxed(n_words, controller->base + QUP_MX_INPUT_CNT);
 		writel_relaxed(n_words, controller->base + QUP_MX_OUTPUT_CNT);
 		/* must be zero for BLOCK and BAM */
 		writel_relaxed(0, controller->base + QUP_MX_READ_CNT);
 		writel_relaxed(0, controller->base + QUP_MX_WRITE_CNT);
-	} else {
-		mode = QUP_IO_M_MODE_BAM;
-		writel_relaxed(0, controller->base + QUP_MX_READ_CNT);
-		writel_relaxed(0, controller->base + QUP_MX_WRITE_CNT);
 
 		if (!controller->qup_v1) {
 			void __iomem *input_cnt;
@@ -528,19 +517,28 @@ static int spi_qup_io_config(struct spi_device *spi, struct spi_transfer *xfer)
 
 			writel_relaxed(0, controller->base + QUP_MX_OUTPUT_CNT);
 		}
+	} else {
+
+		controller->mode = QUP_IO_M_MODE_BLOCK;
+
+		writel_relaxed(n_words, controller->base + QUP_MX_INPUT_CNT);
+		writel_relaxed(n_words, controller->base + QUP_MX_OUTPUT_CNT);
+		/* must be zero for BLOCK and BAM */
+		writel_relaxed(0, controller->base + QUP_MX_READ_CNT);
+		writel_relaxed(0, controller->base + QUP_MX_WRITE_CNT);
 	}
 
 	iomode = readl_relaxed(controller->base + QUP_IO_M_MODES);
 	/* Set input and output transfer mode */
 	iomode &= ~(QUP_IO_M_INPUT_MODE_MASK | QUP_IO_M_OUTPUT_MODE_MASK);
 
-	if (!controller->use_dma)
+	if (!spi_qup_is_dma_xfer(controller->mode))
 		iomode &= ~(QUP_IO_M_PACK_EN | QUP_IO_M_UNPACK_EN);
 	else
 		iomode |= QUP_IO_M_PACK_EN | QUP_IO_M_UNPACK_EN;
 
-	iomode |= (mode << QUP_IO_M_OUTPUT_MODE_MASK_SHIFT);
-	iomode |= (mode << QUP_IO_M_INPUT_MODE_MASK_SHIFT);
+	iomode |= (controller->mode << QUP_IO_M_OUTPUT_MODE_MASK_SHIFT);
+	iomode |= (controller->mode << QUP_IO_M_INPUT_MODE_MASK_SHIFT);
 
 	writel_relaxed(iomode, controller->base + QUP_IO_M_MODES);
 
@@ -581,7 +579,7 @@ static int spi_qup_io_config(struct spi_device *spi, struct spi_transfer *xfer)
 	config |= xfer->bits_per_word - 1;
 	config |= QUP_CONFIG_SPI_MODE;
 
-	if (controller->use_dma) {
+	if (spi_qup_is_dma_xfer(controller->mode)) {
 		if (!xfer->tx_buf)
 			config |= QUP_CONFIG_NO_OUTPUT;
 		if (!xfer->rx_buf)
@@ -599,7 +597,7 @@ static int spi_qup_io_config(struct spi_device *spi, struct spi_transfer *xfer)
 		 * status change in BAM mode
 		 */
 
-		if (mode == QUP_IO_M_MODE_BAM)
+		if (spi_qup_is_dma_xfer(controller->mode))
 			mask = QUP_OP_IN_SERVICE_FLAG | QUP_OP_OUT_SERVICE_FLAG;
 
 		writel_relaxed(mask, controller->base + QUP_OPERATIONAL_MASK);
@@ -633,7 +631,7 @@ static int spi_qup_transfer_one(struct spi_master *master,
 	controller->tx_bytes = 0;
 	spin_unlock_irqrestore(&controller->lock, flags);
 
-	if (controller->use_dma)
+	if (spi_qup_is_dma_xfer(controller->mode))
 		ret = spi_qup_do_dma(master, xfer);
 	else
 		ret = spi_qup_do_pio(master, xfer);
@@ -641,14 +639,6 @@ static int spi_qup_transfer_one(struct spi_master *master,
 	if (ret)
 		goto exit;
 
-	if (spi_qup_set_state(controller, QUP_STATE_RUN)) {
-		dev_warn(controller->dev, "cannot set EXECUTE state\n");
-		goto exit;
-	}
-
-	if (!wait_for_completion_timeout(&controller->done, timeout))
-		ret = -ETIMEDOUT;
-
 exit:
 	spi_qup_set_state(controller, QUP_STATE_RESET);
 	spin_lock_irqsave(&controller->lock, flags);
@@ -657,7 +647,7 @@ static int spi_qup_transfer_one(struct spi_master *master,
 		ret = controller->error;
 	spin_unlock_irqrestore(&controller->lock, flags);
 
-	if (ret && controller->use_dma)
+	if (ret && spi_qup_is_dma_xfer(controller->mode))
 		spi_qup_dma_terminate(master, xfer);
 
 	return ret;
@@ -668,26 +658,28 @@ static bool spi_qup_can_dma(struct spi_master *master, struct spi_device *spi,
 {
 	struct spi_qup *qup = spi_master_get_devdata(master);
 	size_t dma_align = dma_get_cache_alignment();
-	u32 mode;
-
-	qup->use_dma = 0;
+	int n_words;
 
-	if (xfer->rx_buf && (xfer->len % qup->in_blk_sz ||
-	    IS_ERR_OR_NULL(master->dma_rx) ||
-	    !IS_ALIGNED((size_t)xfer->rx_buf, dma_align)))
-		return false;
+	if (xfer->rx_buf) {
+		if (!IS_ALIGNED((size_t)xfer->rx_buf, dma_align) ||
+		    IS_ERR_OR_NULL(master->dma_rx))
+			return false;
+		if (qup->qup_v1 && (xfer->len % qup->in_blk_sz))
+			return false;
+	}
 
-	if (xfer->tx_buf && (xfer->len % qup->out_blk_sz ||
-	    IS_ERR_OR_NULL(master->dma_tx) ||
-	    !IS_ALIGNED((size_t)xfer->tx_buf, dma_align)))
-		return false;
+	if (xfer->tx_buf) {
+		if (!IS_ALIGNED((size_t)xfer->tx_buf, dma_align) ||
+		    IS_ERR_OR_NULL(master->dma_tx))
+			return false;
+		if (qup->qup_v1 && (xfer->len % qup->out_blk_sz))
+			return false;
+	}
 
-	mode = spi_qup_get_mode(master, xfer);
-	if (mode == QUP_IO_M_MODE_FIFO)
+	n_words = xfer->len / DIV_ROUND_UP(xfer->bits_per_word, 8);
+	if (n_words <= (qup->in_fifo_sz / sizeof(u32)))
 		return false;
 
-	qup->use_dma = 1;
-
 	return true;
 }
 
-- 
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation

[PATCH v5 03/14] spi: qup: Add completion timeout

[Varadarajan Narayanan]

Add i/o completion timeout for DMA and PIO modes.

Signed-off-by: Andy Gross <andy.gross-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
Signed-off-by: Varadarajan Narayanan <varada-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
---
 drivers/spi/spi-qup.c | 19 +++++++++++++++----
 1 file changed, 15 insertions(+), 4 deletions(-)

diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
index abe799b..92922b6 100644
--- a/drivers/spi/spi-qup.c
+++ b/drivers/spi/spi-qup.c
@@ -331,7 +331,8 @@ static void spi_qup_dma_terminate(struct spi_master *master,
 		dmaengine_terminate_all(master->dma_rx);
 }
 
-static int spi_qup_do_dma(struct spi_master *master, struct spi_transfer *xfer)
+static int spi_qup_do_dma(struct spi_master *master, struct spi_transfer *xfer,
+			  unsigned long timeout)
 {
 	dma_async_tx_callback rx_done = NULL, tx_done = NULL;
 	int ret;
@@ -357,10 +358,17 @@ static int spi_qup_do_dma(struct spi_master *master, struct spi_transfer *xfer)
 		dma_async_issue_pending(master->dma_tx);
 	}
 
+	if (rx_done && !wait_for_completion_timeout(&qup->done, timeout))
+		return -ETIMEDOUT;
+
+	if (tx_done && !wait_for_completion_timeout(&qup->done, timeout))
+		return -ETIMEDOUT;
+
 	return 0;
 }
 
-static int spi_qup_do_pio(struct spi_master *master, struct spi_transfer *xfer)
+static int spi_qup_do_pio(struct spi_master *master, struct spi_transfer *xfer,
+			  unsigned long timeout)
 {
 	struct spi_qup *qup = spi_master_get_devdata(master);
 	int ret;
@@ -379,6 +387,9 @@ static int spi_qup_do_pio(struct spi_master *master, struct spi_transfer *xfer)
 
 	spi_qup_fifo_write(qup, xfer);
 
+	if (!wait_for_completion_timeout(&qup->done, timeout))
+		return -ETIMEDOUT;
+
 	return 0;
 }
 
@@ -632,9 +643,9 @@ static int spi_qup_transfer_one(struct spi_master *master,
 	spin_unlock_irqrestore(&controller->lock, flags);
 
 	if (spi_qup_is_dma_xfer(controller->mode))
-		ret = spi_qup_do_dma(master, xfer);
+		ret = spi_qup_do_dma(master, xfer, timeout);
 	else
-		ret = spi_qup_do_pio(master, xfer);
+		ret = spi_qup_do_pio(master, xfer, timeout);
 
 	if (ret)
 		goto exit;
-- 
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation

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To unsubscribe from this list: send the line "unsubscribe devicetree" in
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[PATCH v5 03/14] spi: qup: Add completion timeout

[Varadarajan Narayanan]

Add i/o completion timeout for DMA and PIO modes.

Signed-off-by: Andy Gross <andy.gross@linaro.org>
Signed-off-by: Varadarajan Narayanan <varada@codeaurora.org>
---
 drivers/spi/spi-qup.c | 19 +++++++++++++++----
 1 file changed, 15 insertions(+), 4 deletions(-)

diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
index abe799b..92922b6 100644
--- a/drivers/spi/spi-qup.c
+++ b/drivers/spi/spi-qup.c
@@ -331,7 +331,8 @@ static void spi_qup_dma_terminate(struct spi_master *master,
 		dmaengine_terminate_all(master->dma_rx);
 }
 
-static int spi_qup_do_dma(struct spi_master *master, struct spi_transfer *xfer)
+static int spi_qup_do_dma(struct spi_master *master, struct spi_transfer *xfer,
+			  unsigned long timeout)
 {
 	dma_async_tx_callback rx_done = NULL, tx_done = NULL;
 	int ret;
@@ -357,10 +358,17 @@ static int spi_qup_do_dma(struct spi_master *master, struct spi_transfer *xfer)
 		dma_async_issue_pending(master->dma_tx);
 	}
 
+	if (rx_done && !wait_for_completion_timeout(&qup->done, timeout))
+		return -ETIMEDOUT;
+
+	if (tx_done && !wait_for_completion_timeout(&qup->done, timeout))
+		return -ETIMEDOUT;
+
 	return 0;
 }
 
-static int spi_qup_do_pio(struct spi_master *master, struct spi_transfer *xfer)
+static int spi_qup_do_pio(struct spi_master *master, struct spi_transfer *xfer,
+			  unsigned long timeout)
 {
 	struct spi_qup *qup = spi_master_get_devdata(master);
 	int ret;
@@ -379,6 +387,9 @@ static int spi_qup_do_pio(struct spi_master *master, struct spi_transfer *xfer)
 
 	spi_qup_fifo_write(qup, xfer);
 
+	if (!wait_for_completion_timeout(&qup->done, timeout))
+		return -ETIMEDOUT;
+
 	return 0;
 }
 
@@ -632,9 +643,9 @@ static int spi_qup_transfer_one(struct spi_master *master,
 	spin_unlock_irqrestore(&controller->lock, flags);
 
 	if (spi_qup_is_dma_xfer(controller->mode))
-		ret = spi_qup_do_dma(master, xfer);
+		ret = spi_qup_do_dma(master, xfer, timeout);
 	else
-		ret = spi_qup_do_pio(master, xfer);
+		ret = spi_qup_do_pio(master, xfer, timeout);
 
 	if (ret)
 		goto exit;
-- 
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation

Re: [PATCH v5 03/14] spi: qup: Add completion timeout

[kbuild test robot]

[-- Attachment #1: Type: text/plain, Size: 2657 bytes --]

Hi Varadarajan,

[auto build test ERROR on spi/for-next]
[also build test ERROR on v4.13-rc2 next-20170726]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Varadarajan-Narayanan/spi-qup-Fixes-and-add-support-for-64k-transfers/20170725-033101
base:   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git for-next
config: arm64-defconfig (attached as .config)
compiler: aarch64-linux-gnu-gcc (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
        wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=arm64 

Note: the linux-review/Varadarajan-Narayanan/spi-qup-Fixes-and-add-support-for-64k-transfers/20170725-033101 HEAD 88e143f949247832b744d84f5163033eaba09abc builds fine.
      It only hurts bisectibility.

All errors (new ones prefixed by >>):

   drivers//spi/spi-qup.c: In function 'spi_qup_do_dma':
>> drivers//spi/spi-qup.c:361:47: error: 'qup' undeclared (first use in this function)
     if (rx_done && !wait_for_completion_timeout(&qup->done, timeout))
                                                  ^~~
   drivers//spi/spi-qup.c:361:47: note: each undeclared identifier is reported only once for each function it appears in

vim +/qup +361 drivers//spi/spi-qup.c

   333	
   334	static int spi_qup_do_dma(struct spi_master *master, struct spi_transfer *xfer,
   335				  unsigned long timeout)
   336	{
   337		dma_async_tx_callback rx_done = NULL, tx_done = NULL;
   338		int ret;
   339	
   340		if (xfer->rx_buf)
   341			rx_done = spi_qup_dma_done;
   342		else if (xfer->tx_buf)
   343			tx_done = spi_qup_dma_done;
   344	
   345		if (xfer->rx_buf) {
   346			ret = spi_qup_prep_sg(master, xfer, DMA_DEV_TO_MEM, rx_done);
   347			if (ret)
   348				return ret;
   349	
   350			dma_async_issue_pending(master->dma_rx);
   351		}
   352	
   353		if (xfer->tx_buf) {
   354			ret = spi_qup_prep_sg(master, xfer, DMA_MEM_TO_DEV, tx_done);
   355			if (ret)
   356				return ret;
   357	
   358			dma_async_issue_pending(master->dma_tx);
   359		}
   360	
 > 361		if (rx_done && !wait_for_completion_timeout(&qup->done, timeout))
   362			return -ETIMEDOUT;
   363	
   364		if (tx_done && !wait_for_completion_timeout(&qup->done, timeout))
   365			return -ETIMEDOUT;
   366	
   367		return 0;
   368	}
   369	

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 36296 bytes --]

Re: [PATCH v5 03/14] spi: qup: Add completion timeout

[kbuild test robot]

[-- Attachment #1: Type: text/plain, Size: 2657 bytes --]

Hi Varadarajan,

[auto build test ERROR on spi/for-next]
[also build test ERROR on v4.13-rc2 next-20170726]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Varadarajan-Narayanan/spi-qup-Fixes-and-add-support-for-64k-transfers/20170725-033101
base:   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git for-next
config: arm64-defconfig (attached as .config)
compiler: aarch64-linux-gnu-gcc (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
        wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=arm64 

Note: the linux-review/Varadarajan-Narayanan/spi-qup-Fixes-and-add-support-for-64k-transfers/20170725-033101 HEAD 88e143f949247832b744d84f5163033eaba09abc builds fine.
      It only hurts bisectibility.

All errors (new ones prefixed by >>):

   drivers//spi/spi-qup.c: In function 'spi_qup_do_dma':
>> drivers//spi/spi-qup.c:361:47: error: 'qup' undeclared (first use in this function)
     if (rx_done && !wait_for_completion_timeout(&qup->done, timeout))
                                                  ^~~
   drivers//spi/spi-qup.c:361:47: note: each undeclared identifier is reported only once for each function it appears in

vim +/qup +361 drivers//spi/spi-qup.c

   333	
   334	static int spi_qup_do_dma(struct spi_master *master, struct spi_transfer *xfer,
   335				  unsigned long timeout)
   336	{
   337		dma_async_tx_callback rx_done = NULL, tx_done = NULL;
   338		int ret;
   339	
   340		if (xfer->rx_buf)
   341			rx_done = spi_qup_dma_done;
   342		else if (xfer->tx_buf)
   343			tx_done = spi_qup_dma_done;
   344	
   345		if (xfer->rx_buf) {
   346			ret = spi_qup_prep_sg(master, xfer, DMA_DEV_TO_MEM, rx_done);
   347			if (ret)
   348				return ret;
   349	
   350			dma_async_issue_pending(master->dma_rx);
   351		}
   352	
   353		if (xfer->tx_buf) {
   354			ret = spi_qup_prep_sg(master, xfer, DMA_MEM_TO_DEV, tx_done);
   355			if (ret)
   356				return ret;
   357	
   358			dma_async_issue_pending(master->dma_tx);
   359		}
   360	
 > 361		if (rx_done && !wait_for_completion_timeout(&qup->done, timeout))
   362			return -ETIMEDOUT;
   363	
   364		if (tx_done && !wait_for_completion_timeout(&qup->done, timeout))
   365			return -ETIMEDOUT;
   366	
   367		return 0;
   368	}
   369	

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 36296 bytes --]

[PATCH v5 05/14] spi: qup: Fix error handling in spi_qup_prep_sg

[Varadarajan Narayanan]

Signed-off-by: Varadarajan Narayanan <varada-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
---
 drivers/spi/spi-qup.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
index e6294f8..aa1b7b8 100644
--- a/drivers/spi/spi-qup.c
+++ b/drivers/spi/spi-qup.c
@@ -311,8 +311,8 @@ static int spi_qup_prep_sg(struct spi_master *master, struct spi_transfer *xfer,
 	}
 
 	desc = dmaengine_prep_slave_sg(chan, sgl, nents, dir, flags);
-	if (!desc)
-		return -EINVAL;
+	if (IS_ERR_OR_NULL(desc))
+		return desc ? PTR_ERR(desc) : -EINVAL;
 
 	desc->callback = callback;
 	desc->callback_param = qup;
-- 
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation

--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
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[PATCH v5 05/14] spi: qup: Fix error handling in spi_qup_prep_sg

[Varadarajan Narayanan]

Signed-off-by: Varadarajan Narayanan <varada@codeaurora.org>
---
 drivers/spi/spi-qup.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
index e6294f8..aa1b7b8 100644
--- a/drivers/spi/spi-qup.c
+++ b/drivers/spi/spi-qup.c
@@ -311,8 +311,8 @@ static int spi_qup_prep_sg(struct spi_master *master, struct spi_transfer *xfer,
 	}
 
 	desc = dmaengine_prep_slave_sg(chan, sgl, nents, dir, flags);
-	if (!desc)
-		return -EINVAL;
+	if (IS_ERR_OR_NULL(desc))
+		return desc ? PTR_ERR(desc) : -EINVAL;
 
 	desc->callback = callback;
 	desc->callback_param = qup;
-- 
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation

Applied "spi: qup: Fix error handling in spi_qup_prep_sg" to the spi tree

[Mark Brown]

The patch

   spi: qup: Fix error handling in spi_qup_prep_sg

has been applied to the spi tree at

   git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From d9a09a6c0c98d57e5a248c3b9bb10f63d475dfdb Mon Sep 17 00:00:00 2001
From: Varadarajan Narayanan <varada@codeaurora.org>
Date: Fri, 28 Jul 2017 12:22:52 +0530
Subject: [PATCH] spi: qup: Fix error handling in spi_qup_prep_sg

Signed-off-by: Varadarajan Narayanan <varada@codeaurora.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/spi/spi-qup.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
index f1aa5c15d180..ef952946375a 100644
--- a/drivers/spi/spi-qup.c
+++ b/drivers/spi/spi-qup.c
@@ -311,8 +311,8 @@ static int spi_qup_prep_sg(struct spi_master *master, struct spi_transfer *xfer,
 	}
 
 	desc = dmaengine_prep_slave_sg(chan, sgl, nents, dir, flags);
-	if (!desc)
-		return -EINVAL;
+	if (IS_ERR_OR_NULL(desc))
+		return desc ? PTR_ERR(desc) : -EINVAL;
 
 	desc->callback = callback;
 	desc->callback_param = qup;
-- 
2.13.2

Applied "spi: qup: Fix error handling in spi_qup_prep_sg" to the spi tree

[Mark Brown]

The patch

   spi: qup: Fix error handling in spi_qup_prep_sg

has been applied to the spi tree at

   git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From d9a09a6c0c98d57e5a248c3b9bb10f63d475dfdb Mon Sep 17 00:00:00 2001
From: Varadarajan Narayanan <varada@codeaurora.org>
Date: Fri, 28 Jul 2017 12:22:52 +0530
Subject: [PATCH] spi: qup: Fix error handling in spi_qup_prep_sg

Signed-off-by: Varadarajan Narayanan <varada@codeaurora.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/spi/spi-qup.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
index f1aa5c15d180..ef952946375a 100644
--- a/drivers/spi/spi-qup.c
+++ b/drivers/spi/spi-qup.c
@@ -311,8 +311,8 @@ static int spi_qup_prep_sg(struct spi_master *master, struct spi_transfer *xfer,
 	}
 
 	desc = dmaengine_prep_slave_sg(chan, sgl, nents, dir, flags);
-	if (!desc)
-		return -EINVAL;
+	if (IS_ERR_OR_NULL(desc))
+		return desc ? PTR_ERR(desc) : -EINVAL;
 
 	desc->callback = callback;
 	desc->callback_param = qup;
-- 
2.13.2

[PATCH v5 07/14] spi: qup: Do block sized read/write in block mode

[Varadarajan Narayanan]

This patch corrects the behavior of the BLOCK
transactions.  During block transactions, the controller
must be read/written to in block size transactions.

Signed-off-by: Andy Gross <andy.gross-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
Signed-off-by: Varadarajan Narayanan <varada-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
---
 drivers/spi/spi-qup.c | 151 +++++++++++++++++++++++++++++++++++++++-----------
 1 file changed, 119 insertions(+), 32 deletions(-)

diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
index 5e6f7e5..d819f87 100644
--- a/drivers/spi/spi-qup.c
+++ b/drivers/spi/spi-qup.c
@@ -82,6 +82,8 @@
 #define QUP_IO_M_MODE_BAM		3
 
 /* QUP_OPERATIONAL fields */
+#define QUP_OP_IN_BLOCK_READ_REQ	BIT(13)
+#define QUP_OP_OUT_BLOCK_WRITE_REQ	BIT(12)
 #define QUP_OP_MAX_INPUT_DONE_FLAG	BIT(11)
 #define QUP_OP_MAX_OUTPUT_DONE_FLAG	BIT(10)
 #define QUP_OP_IN_SERVICE_FLAG		BIT(9)
@@ -154,6 +156,13 @@ struct spi_qup {
 	struct dma_slave_config	tx_conf;
 };
 
+static inline bool spi_qup_is_flag_set(struct spi_qup *controller, u32 flag)
+{
+	u32 opflag = readl_relaxed(controller->base + QUP_OPERATIONAL);
+
+	return (opflag & flag) != 0;
+}
+
 static inline bool spi_qup_is_dma_xfer(int mode)
 {
 	if (mode == QUP_IO_M_MODE_DMOV || mode == QUP_IO_M_MODE_BAM)
@@ -214,29 +223,26 @@ static int spi_qup_set_state(struct spi_qup *controller, u32 state)
 	return 0;
 }
 
-static void spi_qup_fifo_read(struct spi_qup *controller,
-			    struct spi_transfer *xfer)
+static void spi_qup_read_from_fifo(struct spi_qup *controller,
+	struct spi_transfer *xfer, u32 num_words)
 {
 	u8 *rx_buf = xfer->rx_buf;
-	u32 word, state;
-	int idx, shift, w_size;
+	int i, shift, num_bytes;
+	u32 word;
 
-	w_size = controller->w_size;
-
-	while (controller->rx_bytes < xfer->len) {
-
-		state = readl_relaxed(controller->base + QUP_OPERATIONAL);
-		if (0 == (state & QUP_OP_IN_FIFO_NOT_EMPTY))
-			break;
+	for (; num_words; num_words--) {
 
 		word = readl_relaxed(controller->base + QUP_INPUT_FIFO);
 
+		num_bytes = min_t(int, xfer->len - controller->rx_bytes,
+					controller->w_size);
+
 		if (!rx_buf) {
-			controller->rx_bytes += w_size;
+			controller->rx_bytes += num_bytes;
 			continue;
 		}
 
-		for (idx = 0; idx < w_size; idx++, controller->rx_bytes++) {
+		for (i = 0; i < num_bytes; i++, controller->rx_bytes++) {
 			/*
 			 * The data format depends on bytes per SPI word:
 			 *  4 bytes: 0x12345678
@@ -244,38 +250,80 @@ static void spi_qup_fifo_read(struct spi_qup *controller,
 			 *  1 byte : 0x00000012
 			 */
 			shift = BITS_PER_BYTE;
-			shift *= (w_size - idx - 1);
+			shift *= (controller->w_size - i - 1);
 			rx_buf[controller->rx_bytes] = word >> shift;
 		}
 	}
 }
 
-static void spi_qup_fifo_write(struct spi_qup *controller,
+static void spi_qup_read(struct spi_qup *controller,
 			    struct spi_transfer *xfer)
 {
-	const u8 *tx_buf = xfer->tx_buf;
-	u32 word, state, data;
-	int idx, w_size;
+	u32 remainder, words_per_block, num_words;
+	bool is_block_mode = controller->mode == QUP_IO_M_MODE_BLOCK;
+
+	remainder = DIV_ROUND_UP(xfer->len - controller->rx_bytes,
+				 controller->w_size);
+	words_per_block = controller->in_blk_sz >> 2;
+
+	do {
+		/* ACK by clearing service flag */
+		writel_relaxed(QUP_OP_IN_SERVICE_FLAG,
+			       controller->base + QUP_OPERATIONAL);
+
+		if (is_block_mode) {
+			num_words = (remainder > words_per_block) ?
+					words_per_block : remainder;
+		} else {
+			if (!spi_qup_is_flag_set(controller,
+						 QUP_OP_IN_FIFO_NOT_EMPTY))
+				break;
 
-	w_size = controller->w_size;
+			num_words = 1;
+		}
 
-	while (controller->tx_bytes < xfer->len) {
+		/* read up to the maximum transfer size available */
+		spi_qup_read_from_fifo(controller, xfer, num_words);
 
-		state = readl_relaxed(controller->base + QUP_OPERATIONAL);
-		if (state & QUP_OP_OUT_FIFO_FULL)
+		remainder -= num_words;
+
+		/* if block mode, check to see if next block is available */
+		if (is_block_mode && !spi_qup_is_flag_set(controller,
+					QUP_OP_IN_BLOCK_READ_REQ))
 			break;
 
+	} while (remainder);
+
+	/*
+	 * Due to extra stickiness of the QUP_OP_IN_SERVICE_FLAG during block
+	 * mode reads, it has to be cleared again at the very end
+	 */
+	if (is_block_mode && spi_qup_is_flag_set(controller,
+				QUP_OP_MAX_INPUT_DONE_FLAG))
+		writel_relaxed(QUP_OP_IN_SERVICE_FLAG,
+			       controller->base + QUP_OPERATIONAL);
+
+}
+
+static void spi_qup_write_to_fifo(struct spi_qup *controller,
+	struct spi_transfer *xfer, u32 num_words)
+{
+	const u8 *tx_buf = xfer->tx_buf;
+	int i, num_bytes;
+	u32 word, data;
+
+	for (; num_words; num_words--) {
 		word = 0;
-		for (idx = 0; idx < w_size; idx++, controller->tx_bytes++) {
 
-			if (!tx_buf) {
-				controller->tx_bytes += w_size;
-				break;
+		num_bytes = min_t(int, xfer->len - controller->tx_bytes,
+				    controller->w_size);
+		if (tx_buf)
+			for (i = 0; i < num_bytes; i++) {
+				data = tx_buf[controller->tx_bytes + i];
+				word |= data << (BITS_PER_BYTE * (3 - i));
 			}
 
-			data = tx_buf[controller->tx_bytes];
-			word |= data << (BITS_PER_BYTE * (3 - idx));
-		}
+		controller->tx_bytes += num_bytes;
 
 		writel_relaxed(word, controller->base + QUP_OUTPUT_FIFO);
 	}
@@ -288,6 +336,44 @@ static void spi_qup_dma_done(void *data)
 	complete(&qup->done);
 }
 
+static void spi_qup_write(struct spi_qup *controller,
+			    struct spi_transfer *xfer)
+{
+	bool is_block_mode = controller->mode == QUP_IO_M_MODE_BLOCK;
+	u32 remainder, words_per_block, num_words;
+
+	remainder = DIV_ROUND_UP(xfer->len - controller->tx_bytes,
+				 controller->w_size);
+	words_per_block = controller->out_blk_sz >> 2;
+
+	do {
+		/* ACK by clearing service flag */
+		writel_relaxed(QUP_OP_OUT_SERVICE_FLAG,
+			       controller->base + QUP_OPERATIONAL);
+
+		if (is_block_mode) {
+			num_words = (remainder > words_per_block) ?
+				words_per_block : remainder;
+		} else {
+			if (spi_qup_is_flag_set(controller,
+						QUP_OP_OUT_FIFO_FULL))
+				break;
+
+			num_words = 1;
+		}
+
+		spi_qup_write_to_fifo(controller, xfer, num_words);
+
+		remainder -= num_words;
+
+		/* if block mode, check to see if next block is available */
+		if (is_block_mode && !spi_qup_is_flag_set(controller,
+					QUP_OP_OUT_BLOCK_WRITE_REQ))
+			break;
+
+	} while (remainder);
+}
+
 static int spi_qup_prep_sg(struct spi_master *master, struct spi_transfer *xfer,
 			   enum dma_transfer_direction dir,
 			   dma_async_tx_callback callback)
@@ -393,7 +479,8 @@ static int spi_qup_do_pio(struct spi_master *master, struct spi_transfer *xfer,
 		return ret;
 	}
 
-	spi_qup_fifo_write(qup, xfer);
+	if (qup->mode == QUP_IO_M_MODE_FIFO)
+		spi_qup_write(qup, xfer);
 
 	ret = spi_qup_set_state(qup, QUP_STATE_RUN);
 	if (ret) {
@@ -448,10 +535,10 @@ static irqreturn_t spi_qup_qup_irq(int irq, void *dev_id)
 		writel_relaxed(opflags, controller->base + QUP_OPERATIONAL);
 	} else {
 		if (opflags & QUP_OP_IN_SERVICE_FLAG)
-			spi_qup_fifo_read(controller, xfer);
+			spi_qup_read(controller, xfer);
 
 		if (opflags & QUP_OP_OUT_SERVICE_FLAG)
-			spi_qup_fifo_write(controller, xfer);
+			spi_qup_write(controller, xfer);
 	}
 
 	if ((opflags & QUP_OP_MAX_INPUT_DONE_FLAG) || error)
-- 
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation

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[PATCH v5 07/14] spi: qup: Do block sized read/write in block mode

[Varadarajan Narayanan]

This patch corrects the behavior of the BLOCK
transactions.  During block transactions, the controller
must be read/written to in block size transactions.

Signed-off-by: Andy Gross <andy.gross@linaro.org>
Signed-off-by: Varadarajan Narayanan <varada@codeaurora.org>
---
 drivers/spi/spi-qup.c | 151 +++++++++++++++++++++++++++++++++++++++-----------
 1 file changed, 119 insertions(+), 32 deletions(-)

diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
index 5e6f7e5..d819f87 100644
--- a/drivers/spi/spi-qup.c
+++ b/drivers/spi/spi-qup.c
@@ -82,6 +82,8 @@
 #define QUP_IO_M_MODE_BAM		3
 
 /* QUP_OPERATIONAL fields */
+#define QUP_OP_IN_BLOCK_READ_REQ	BIT(13)
+#define QUP_OP_OUT_BLOCK_WRITE_REQ	BIT(12)
 #define QUP_OP_MAX_INPUT_DONE_FLAG	BIT(11)
 #define QUP_OP_MAX_OUTPUT_DONE_FLAG	BIT(10)
 #define QUP_OP_IN_SERVICE_FLAG		BIT(9)
@@ -154,6 +156,13 @@ struct spi_qup {
 	struct dma_slave_config	tx_conf;
 };
 
+static inline bool spi_qup_is_flag_set(struct spi_qup *controller, u32 flag)
+{
+	u32 opflag = readl_relaxed(controller->base + QUP_OPERATIONAL);
+
+	return (opflag & flag) != 0;
+}
+
 static inline bool spi_qup_is_dma_xfer(int mode)
 {
 	if (mode == QUP_IO_M_MODE_DMOV || mode == QUP_IO_M_MODE_BAM)
@@ -214,29 +223,26 @@ static int spi_qup_set_state(struct spi_qup *controller, u32 state)
 	return 0;
 }
 
-static void spi_qup_fifo_read(struct spi_qup *controller,
-			    struct spi_transfer *xfer)
+static void spi_qup_read_from_fifo(struct spi_qup *controller,
+	struct spi_transfer *xfer, u32 num_words)
 {
 	u8 *rx_buf = xfer->rx_buf;
-	u32 word, state;
-	int idx, shift, w_size;
+	int i, shift, num_bytes;
+	u32 word;
 
-	w_size = controller->w_size;
-
-	while (controller->rx_bytes < xfer->len) {
-
-		state = readl_relaxed(controller->base + QUP_OPERATIONAL);
-		if (0 == (state & QUP_OP_IN_FIFO_NOT_EMPTY))
-			break;
+	for (; num_words; num_words--) {
 
 		word = readl_relaxed(controller->base + QUP_INPUT_FIFO);
 
+		num_bytes = min_t(int, xfer->len - controller->rx_bytes,
+					controller->w_size);
+
 		if (!rx_buf) {
-			controller->rx_bytes += w_size;
+			controller->rx_bytes += num_bytes;
 			continue;
 		}
 
-		for (idx = 0; idx < w_size; idx++, controller->rx_bytes++) {
+		for (i = 0; i < num_bytes; i++, controller->rx_bytes++) {
 			/*
 			 * The data format depends on bytes per SPI word:
 			 *  4 bytes: 0x12345678
@@ -244,38 +250,80 @@ static void spi_qup_fifo_read(struct spi_qup *controller,
 			 *  1 byte : 0x00000012
 			 */
 			shift = BITS_PER_BYTE;
-			shift *= (w_size - idx - 1);
+			shift *= (controller->w_size - i - 1);
 			rx_buf[controller->rx_bytes] = word >> shift;
 		}
 	}
 }
 
-static void spi_qup_fifo_write(struct spi_qup *controller,
+static void spi_qup_read(struct spi_qup *controller,
 			    struct spi_transfer *xfer)
 {
-	const u8 *tx_buf = xfer->tx_buf;
-	u32 word, state, data;
-	int idx, w_size;
+	u32 remainder, words_per_block, num_words;
+	bool is_block_mode = controller->mode == QUP_IO_M_MODE_BLOCK;
+
+	remainder = DIV_ROUND_UP(xfer->len - controller->rx_bytes,
+				 controller->w_size);
+	words_per_block = controller->in_blk_sz >> 2;
+
+	do {
+		/* ACK by clearing service flag */
+		writel_relaxed(QUP_OP_IN_SERVICE_FLAG,
+			       controller->base + QUP_OPERATIONAL);
+
+		if (is_block_mode) {
+			num_words = (remainder > words_per_block) ?
+					words_per_block : remainder;
+		} else {
+			if (!spi_qup_is_flag_set(controller,
+						 QUP_OP_IN_FIFO_NOT_EMPTY))
+				break;
 
-	w_size = controller->w_size;
+			num_words = 1;
+		}
 
-	while (controller->tx_bytes < xfer->len) {
+		/* read up to the maximum transfer size available */
+		spi_qup_read_from_fifo(controller, xfer, num_words);
 
-		state = readl_relaxed(controller->base + QUP_OPERATIONAL);
-		if (state & QUP_OP_OUT_FIFO_FULL)
+		remainder -= num_words;
+
+		/* if block mode, check to see if next block is available */
+		if (is_block_mode && !spi_qup_is_flag_set(controller,
+					QUP_OP_IN_BLOCK_READ_REQ))
 			break;
 
+	} while (remainder);
+
+	/*
+	 * Due to extra stickiness of the QUP_OP_IN_SERVICE_FLAG during block
+	 * mode reads, it has to be cleared again at the very end
+	 */
+	if (is_block_mode && spi_qup_is_flag_set(controller,
+				QUP_OP_MAX_INPUT_DONE_FLAG))
+		writel_relaxed(QUP_OP_IN_SERVICE_FLAG,
+			       controller->base + QUP_OPERATIONAL);
+
+}
+
+static void spi_qup_write_to_fifo(struct spi_qup *controller,
+	struct spi_transfer *xfer, u32 num_words)
+{
+	const u8 *tx_buf = xfer->tx_buf;
+	int i, num_bytes;
+	u32 word, data;
+
+	for (; num_words; num_words--) {
 		word = 0;
-		for (idx = 0; idx < w_size; idx++, controller->tx_bytes++) {
 
-			if (!tx_buf) {
-				controller->tx_bytes += w_size;
-				break;
+		num_bytes = min_t(int, xfer->len - controller->tx_bytes,
+				    controller->w_size);
+		if (tx_buf)
+			for (i = 0; i < num_bytes; i++) {
+				data = tx_buf[controller->tx_bytes + i];
+				word |= data << (BITS_PER_BYTE * (3 - i));
 			}
 
-			data = tx_buf[controller->tx_bytes];
-			word |= data << (BITS_PER_BYTE * (3 - idx));
-		}
+		controller->tx_bytes += num_bytes;
 
 		writel_relaxed(word, controller->base + QUP_OUTPUT_FIFO);
 	}
@@ -288,6 +336,44 @@ static void spi_qup_dma_done(void *data)
 	complete(&qup->done);
 }
 
+static void spi_qup_write(struct spi_qup *controller,
+			    struct spi_transfer *xfer)
+{
+	bool is_block_mode = controller->mode == QUP_IO_M_MODE_BLOCK;
+	u32 remainder, words_per_block, num_words;
+
+	remainder = DIV_ROUND_UP(xfer->len - controller->tx_bytes,
+				 controller->w_size);
+	words_per_block = controller->out_blk_sz >> 2;
+
+	do {
+		/* ACK by clearing service flag */
+		writel_relaxed(QUP_OP_OUT_SERVICE_FLAG,
+			       controller->base + QUP_OPERATIONAL);
+
+		if (is_block_mode) {
+			num_words = (remainder > words_per_block) ?
+				words_per_block : remainder;
+		} else {
+			if (spi_qup_is_flag_set(controller,
+						QUP_OP_OUT_FIFO_FULL))
+				break;
+
+			num_words = 1;
+		}
+
+		spi_qup_write_to_fifo(controller, xfer, num_words);
+
+		remainder -= num_words;
+
+		/* if block mode, check to see if next block is available */
+		if (is_block_mode && !spi_qup_is_flag_set(controller,
+					QUP_OP_OUT_BLOCK_WRITE_REQ))
+			break;
+
+	} while (remainder);
+}
+
 static int spi_qup_prep_sg(struct spi_master *master, struct spi_transfer *xfer,
 			   enum dma_transfer_direction dir,
 			   dma_async_tx_callback callback)
@@ -393,7 +479,8 @@ static int spi_qup_do_pio(struct spi_master *master, struct spi_transfer *xfer,
 		return ret;
 	}
 
-	spi_qup_fifo_write(qup, xfer);
+	if (qup->mode == QUP_IO_M_MODE_FIFO)
+		spi_qup_write(qup, xfer);
 
 	ret = spi_qup_set_state(qup, QUP_STATE_RUN);
 	if (ret) {
@@ -448,10 +535,10 @@ static irqreturn_t spi_qup_qup_irq(int irq, void *dev_id)
 		writel_relaxed(opflags, controller->base + QUP_OPERATIONAL);
 	} else {
 		if (opflags & QUP_OP_IN_SERVICE_FLAG)
-			spi_qup_fifo_read(controller, xfer);
+			spi_qup_read(controller, xfer);
 
 		if (opflags & QUP_OP_OUT_SERVICE_FLAG)
-			spi_qup_fifo_write(controller, xfer);
+			spi_qup_write(controller, xfer);
 	}
 
 	if ((opflags & QUP_OP_MAX_INPUT_DONE_FLAG) || error)
-- 
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation

Applied "spi: qup: Do block sized read/write in block mode" to the spi tree

[Mark Brown]

The patch

   spi: qup: Do block sized read/write in block mode

has been applied to the spi tree at

   git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 7538726f9ddaa53b72d61116728cf2d189b05202 Mon Sep 17 00:00:00 2001
From: Varadarajan Narayanan <varada@codeaurora.org>
Date: Fri, 28 Jul 2017 12:22:54 +0530
Subject: [PATCH] spi: qup: Do block sized read/write in block mode

This patch corrects the behavior of the BLOCK
transactions.  During block transactions, the controller
must be read/written to in block size transactions.

Signed-off-by: Andy Gross <andy.gross@linaro.org>
Signed-off-by: Varadarajan Narayanan <varada@codeaurora.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/spi/spi-qup.c | 151 +++++++++++++++++++++++++++++++++++++++-----------
 1 file changed, 119 insertions(+), 32 deletions(-)

diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
index a7c630c4788c..8cfa112bb142 100644
--- a/drivers/spi/spi-qup.c
+++ b/drivers/spi/spi-qup.c
@@ -82,6 +82,8 @@
 #define QUP_IO_M_MODE_BAM		3
 
 /* QUP_OPERATIONAL fields */
+#define QUP_OP_IN_BLOCK_READ_REQ	BIT(13)
+#define QUP_OP_OUT_BLOCK_WRITE_REQ	BIT(12)
 #define QUP_OP_MAX_INPUT_DONE_FLAG	BIT(11)
 #define QUP_OP_MAX_OUTPUT_DONE_FLAG	BIT(10)
 #define QUP_OP_IN_SERVICE_FLAG		BIT(9)
@@ -154,6 +156,13 @@ struct spi_qup {
 	struct dma_slave_config	tx_conf;
 };
 
+static inline bool spi_qup_is_flag_set(struct spi_qup *controller, u32 flag)
+{
+	u32 opflag = readl_relaxed(controller->base + QUP_OPERATIONAL);
+
+	return (opflag & flag) != 0;
+}
+
 static inline bool spi_qup_is_dma_xfer(int mode)
 {
 	if (mode == QUP_IO_M_MODE_DMOV || mode == QUP_IO_M_MODE_BAM)
@@ -214,29 +223,26 @@ static int spi_qup_set_state(struct spi_qup *controller, u32 state)
 	return 0;
 }
 
-static void spi_qup_fifo_read(struct spi_qup *controller,
-			    struct spi_transfer *xfer)
+static void spi_qup_read_from_fifo(struct spi_qup *controller,
+	struct spi_transfer *xfer, u32 num_words)
 {
 	u8 *rx_buf = xfer->rx_buf;
-	u32 word, state;
-	int idx, shift, w_size;
+	int i, shift, num_bytes;
+	u32 word;
 
-	w_size = controller->w_size;
-
-	while (controller->rx_bytes < xfer->len) {
-
-		state = readl_relaxed(controller->base + QUP_OPERATIONAL);
-		if (0 == (state & QUP_OP_IN_FIFO_NOT_EMPTY))
-			break;
+	for (; num_words; num_words--) {
 
 		word = readl_relaxed(controller->base + QUP_INPUT_FIFO);
 
+		num_bytes = min_t(int, xfer->len - controller->rx_bytes,
+					controller->w_size);
+
 		if (!rx_buf) {
-			controller->rx_bytes += w_size;
+			controller->rx_bytes += num_bytes;
 			continue;
 		}
 
-		for (idx = 0; idx < w_size; idx++, controller->rx_bytes++) {
+		for (i = 0; i < num_bytes; i++, controller->rx_bytes++) {
 			/*
 			 * The data format depends on bytes per SPI word:
 			 *  4 bytes: 0x12345678
@@ -244,38 +250,80 @@ static void spi_qup_fifo_read(struct spi_qup *controller,
 			 *  1 byte : 0x00000012
 			 */
 			shift = BITS_PER_BYTE;
-			shift *= (w_size - idx - 1);
+			shift *= (controller->w_size - i - 1);
 			rx_buf[controller->rx_bytes] = word >> shift;
 		}
 	}
 }
 
-static void spi_qup_fifo_write(struct spi_qup *controller,
+static void spi_qup_read(struct spi_qup *controller,
 			    struct spi_transfer *xfer)
 {
-	const u8 *tx_buf = xfer->tx_buf;
-	u32 word, state, data;
-	int idx, w_size;
+	u32 remainder, words_per_block, num_words;
+	bool is_block_mode = controller->mode == QUP_IO_M_MODE_BLOCK;
+
+	remainder = DIV_ROUND_UP(xfer->len - controller->rx_bytes,
+				 controller->w_size);
+	words_per_block = controller->in_blk_sz >> 2;
+
+	do {
+		/* ACK by clearing service flag */
+		writel_relaxed(QUP_OP_IN_SERVICE_FLAG,
+			       controller->base + QUP_OPERATIONAL);
+
+		if (is_block_mode) {
+			num_words = (remainder > words_per_block) ?
+					words_per_block : remainder;
+		} else {
+			if (!spi_qup_is_flag_set(controller,
+						 QUP_OP_IN_FIFO_NOT_EMPTY))
+				break;
 
-	w_size = controller->w_size;
+			num_words = 1;
+		}
 
-	while (controller->tx_bytes < xfer->len) {
+		/* read up to the maximum transfer size available */
+		spi_qup_read_from_fifo(controller, xfer, num_words);
 
-		state = readl_relaxed(controller->base + QUP_OPERATIONAL);
-		if (state & QUP_OP_OUT_FIFO_FULL)
+		remainder -= num_words;
+
+		/* if block mode, check to see if next block is available */
+		if (is_block_mode && !spi_qup_is_flag_set(controller,
+					QUP_OP_IN_BLOCK_READ_REQ))
 			break;
 
+	} while (remainder);
+
+	/*
+	 * Due to extra stickiness of the QUP_OP_IN_SERVICE_FLAG during block
+	 * mode reads, it has to be cleared again at the very end
+	 */
+	if (is_block_mode && spi_qup_is_flag_set(controller,
+				QUP_OP_MAX_INPUT_DONE_FLAG))
+		writel_relaxed(QUP_OP_IN_SERVICE_FLAG,
+			       controller->base + QUP_OPERATIONAL);
+
+}
+
+static void spi_qup_write_to_fifo(struct spi_qup *controller,
+	struct spi_transfer *xfer, u32 num_words)
+{
+	const u8 *tx_buf = xfer->tx_buf;
+	int i, num_bytes;
+	u32 word, data;
+
+	for (; num_words; num_words--) {
 		word = 0;
-		for (idx = 0; idx < w_size; idx++, controller->tx_bytes++) {
 
-			if (!tx_buf) {
-				controller->tx_bytes += w_size;
-				break;
+		num_bytes = min_t(int, xfer->len - controller->tx_bytes,
+				    controller->w_size);
+		if (tx_buf)
+			for (i = 0; i < num_bytes; i++) {
+				data = tx_buf[controller->tx_bytes + i];
+				word |= data << (BITS_PER_BYTE * (3 - i));
 			}
 
-			data = tx_buf[controller->tx_bytes];
-			word |= data << (BITS_PER_BYTE * (3 - idx));
-		}
+		controller->tx_bytes += num_bytes;
 
 		writel_relaxed(word, controller->base + QUP_OUTPUT_FIFO);
 	}
@@ -288,6 +336,44 @@ static void spi_qup_dma_done(void *data)
 	complete(&qup->done);
 }
 
+static void spi_qup_write(struct spi_qup *controller,
+			    struct spi_transfer *xfer)
+{
+	bool is_block_mode = controller->mode == QUP_IO_M_MODE_BLOCK;
+	u32 remainder, words_per_block, num_words;
+
+	remainder = DIV_ROUND_UP(xfer->len - controller->tx_bytes,
+				 controller->w_size);
+	words_per_block = controller->out_blk_sz >> 2;
+
+	do {
+		/* ACK by clearing service flag */
+		writel_relaxed(QUP_OP_OUT_SERVICE_FLAG,
+			       controller->base + QUP_OPERATIONAL);
+
+		if (is_block_mode) {
+			num_words = (remainder > words_per_block) ?
+				words_per_block : remainder;
+		} else {
+			if (spi_qup_is_flag_set(controller,
+						QUP_OP_OUT_FIFO_FULL))
+				break;
+
+			num_words = 1;
+		}
+
+		spi_qup_write_to_fifo(controller, xfer, num_words);
+
+		remainder -= num_words;
+
+		/* if block mode, check to see if next block is available */
+		if (is_block_mode && !spi_qup_is_flag_set(controller,
+					QUP_OP_OUT_BLOCK_WRITE_REQ))
+			break;
+
+	} while (remainder);
+}
+
 static int spi_qup_prep_sg(struct spi_master *master, struct spi_transfer *xfer,
 			   enum dma_transfer_direction dir,
 			   dma_async_tx_callback callback)
@@ -391,7 +477,8 @@ static int spi_qup_do_pio(struct spi_master *master, struct spi_transfer *xfer,
 		return ret;
 	}
 
-	spi_qup_fifo_write(qup, xfer);
+	if (qup->mode == QUP_IO_M_MODE_FIFO)
+		spi_qup_write(qup, xfer);
 
 	ret = spi_qup_set_state(qup, QUP_STATE_RUN);
 	if (ret) {
@@ -446,10 +533,10 @@ static irqreturn_t spi_qup_qup_irq(int irq, void *dev_id)
 		writel_relaxed(opflags, controller->base + QUP_OPERATIONAL);
 	} else {
 		if (opflags & QUP_OP_IN_SERVICE_FLAG)
-			spi_qup_fifo_read(controller, xfer);
+			spi_qup_read(controller, xfer);
 
 		if (opflags & QUP_OP_OUT_SERVICE_FLAG)
-			spi_qup_fifo_write(controller, xfer);
+			spi_qup_write(controller, xfer);
 	}
 
 	if ((opflags & QUP_OP_MAX_INPUT_DONE_FLAG) || error)
-- 
2.13.2

Applied "spi: qup: Do block sized read/write in block mode" to the spi tree

[Mark Brown]

The patch

   spi: qup: Do block sized read/write in block mode

has been applied to the spi tree at

   git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 7538726f9ddaa53b72d61116728cf2d189b05202 Mon Sep 17 00:00:00 2001
From: Varadarajan Narayanan <varada@codeaurora.org>
Date: Fri, 28 Jul 2017 12:22:54 +0530
Subject: [PATCH] spi: qup: Do block sized read/write in block mode

This patch corrects the behavior of the BLOCK
transactions.  During block transactions, the controller
must be read/written to in block size transactions.

Signed-off-by: Andy Gross <andy.gross@linaro.org>
Signed-off-by: Varadarajan Narayanan <varada@codeaurora.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/spi/spi-qup.c | 151 +++++++++++++++++++++++++++++++++++++++-----------
 1 file changed, 119 insertions(+), 32 deletions(-)

diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
index a7c630c4788c..8cfa112bb142 100644
--- a/drivers/spi/spi-qup.c
+++ b/drivers/spi/spi-qup.c
@@ -82,6 +82,8 @@
 #define QUP_IO_M_MODE_BAM		3
 
 /* QUP_OPERATIONAL fields */
+#define QUP_OP_IN_BLOCK_READ_REQ	BIT(13)
+#define QUP_OP_OUT_BLOCK_WRITE_REQ	BIT(12)
 #define QUP_OP_MAX_INPUT_DONE_FLAG	BIT(11)
 #define QUP_OP_MAX_OUTPUT_DONE_FLAG	BIT(10)
 #define QUP_OP_IN_SERVICE_FLAG		BIT(9)
@@ -154,6 +156,13 @@ struct spi_qup {
 	struct dma_slave_config	tx_conf;
 };
 
+static inline bool spi_qup_is_flag_set(struct spi_qup *controller, u32 flag)
+{
+	u32 opflag = readl_relaxed(controller->base + QUP_OPERATIONAL);
+
+	return (opflag & flag) != 0;
+}
+
 static inline bool spi_qup_is_dma_xfer(int mode)
 {
 	if (mode == QUP_IO_M_MODE_DMOV || mode == QUP_IO_M_MODE_BAM)
@@ -214,29 +223,26 @@ static int spi_qup_set_state(struct spi_qup *controller, u32 state)
 	return 0;
 }
 
-static void spi_qup_fifo_read(struct spi_qup *controller,
-			    struct spi_transfer *xfer)
+static void spi_qup_read_from_fifo(struct spi_qup *controller,
+	struct spi_transfer *xfer, u32 num_words)
 {
 	u8 *rx_buf = xfer->rx_buf;
-	u32 word, state;
-	int idx, shift, w_size;
+	int i, shift, num_bytes;
+	u32 word;
 
-	w_size = controller->w_size;
-
-	while (controller->rx_bytes < xfer->len) {
-
-		state = readl_relaxed(controller->base + QUP_OPERATIONAL);
-		if (0 == (state & QUP_OP_IN_FIFO_NOT_EMPTY))
-			break;
+	for (; num_words; num_words--) {
 
 		word = readl_relaxed(controller->base + QUP_INPUT_FIFO);
 
+		num_bytes = min_t(int, xfer->len - controller->rx_bytes,
+					controller->w_size);
+
 		if (!rx_buf) {
-			controller->rx_bytes += w_size;
+			controller->rx_bytes += num_bytes;
 			continue;
 		}
 
-		for (idx = 0; idx < w_size; idx++, controller->rx_bytes++) {
+		for (i = 0; i < num_bytes; i++, controller->rx_bytes++) {
 			/*
 			 * The data format depends on bytes per SPI word:
 			 *  4 bytes: 0x12345678
@@ -244,38 +250,80 @@ static void spi_qup_fifo_read(struct spi_qup *controller,
 			 *  1 byte : 0x00000012
 			 */
 			shift = BITS_PER_BYTE;
-			shift *= (w_size - idx - 1);
+			shift *= (controller->w_size - i - 1);
 			rx_buf[controller->rx_bytes] = word >> shift;
 		}
 	}
 }
 
-static void spi_qup_fifo_write(struct spi_qup *controller,
+static void spi_qup_read(struct spi_qup *controller,
 			    struct spi_transfer *xfer)
 {
-	const u8 *tx_buf = xfer->tx_buf;
-	u32 word, state, data;
-	int idx, w_size;
+	u32 remainder, words_per_block, num_words;
+	bool is_block_mode = controller->mode == QUP_IO_M_MODE_BLOCK;
+
+	remainder = DIV_ROUND_UP(xfer->len - controller->rx_bytes,
+				 controller->w_size);
+	words_per_block = controller->in_blk_sz >> 2;
+
+	do {
+		/* ACK by clearing service flag */
+		writel_relaxed(QUP_OP_IN_SERVICE_FLAG,
+			       controller->base + QUP_OPERATIONAL);
+
+		if (is_block_mode) {
+			num_words = (remainder > words_per_block) ?
+					words_per_block : remainder;
+		} else {
+			if (!spi_qup_is_flag_set(controller,
+						 QUP_OP_IN_FIFO_NOT_EMPTY))
+				break;
 
-	w_size = controller->w_size;
+			num_words = 1;
+		}
 
-	while (controller->tx_bytes < xfer->len) {
+		/* read up to the maximum transfer size available */
+		spi_qup_read_from_fifo(controller, xfer, num_words);
 
-		state = readl_relaxed(controller->base + QUP_OPERATIONAL);
-		if (state & QUP_OP_OUT_FIFO_FULL)
+		remainder -= num_words;
+
+		/* if block mode, check to see if next block is available */
+		if (is_block_mode && !spi_qup_is_flag_set(controller,
+					QUP_OP_IN_BLOCK_READ_REQ))
 			break;
 
+	} while (remainder);
+
+	/*
+	 * Due to extra stickiness of the QUP_OP_IN_SERVICE_FLAG during block
+	 * mode reads, it has to be cleared again at the very end
+	 */
+	if (is_block_mode && spi_qup_is_flag_set(controller,
+				QUP_OP_MAX_INPUT_DONE_FLAG))
+		writel_relaxed(QUP_OP_IN_SERVICE_FLAG,
+			       controller->base + QUP_OPERATIONAL);
+
+}
+
+static void spi_qup_write_to_fifo(struct spi_qup *controller,
+	struct spi_transfer *xfer, u32 num_words)
+{
+	const u8 *tx_buf = xfer->tx_buf;
+	int i, num_bytes;
+	u32 word, data;
+
+	for (; num_words; num_words--) {
 		word = 0;
-		for (idx = 0; idx < w_size; idx++, controller->tx_bytes++) {
 
-			if (!tx_buf) {
-				controller->tx_bytes += w_size;
-				break;
+		num_bytes = min_t(int, xfer->len - controller->tx_bytes,
+				    controller->w_size);
+		if (tx_buf)
+			for (i = 0; i < num_bytes; i++) {
+				data = tx_buf[controller->tx_bytes + i];
+				word |= data << (BITS_PER_BYTE * (3 - i));
 			}
 
-			data = tx_buf[controller->tx_bytes];
-			word |= data << (BITS_PER_BYTE * (3 - idx));
-		}
+		controller->tx_bytes += num_bytes;
 
 		writel_relaxed(word, controller->base + QUP_OUTPUT_FIFO);
 	}
@@ -288,6 +336,44 @@ static void spi_qup_dma_done(void *data)
 	complete(&qup->done);
 }
 
+static void spi_qup_write(struct spi_qup *controller,
+			    struct spi_transfer *xfer)
+{
+	bool is_block_mode = controller->mode == QUP_IO_M_MODE_BLOCK;
+	u32 remainder, words_per_block, num_words;
+
+	remainder = DIV_ROUND_UP(xfer->len - controller->tx_bytes,
+				 controller->w_size);
+	words_per_block = controller->out_blk_sz >> 2;
+
+	do {
+		/* ACK by clearing service flag */
+		writel_relaxed(QUP_OP_OUT_SERVICE_FLAG,
+			       controller->base + QUP_OPERATIONAL);
+
+		if (is_block_mode) {
+			num_words = (remainder > words_per_block) ?
+				words_per_block : remainder;
+		} else {
+			if (spi_qup_is_flag_set(controller,
+						QUP_OP_OUT_FIFO_FULL))
+				break;
+
+			num_words = 1;
+		}
+
+		spi_qup_write_to_fifo(controller, xfer, num_words);
+
+		remainder -= num_words;
+
+		/* if block mode, check to see if next block is available */
+		if (is_block_mode && !spi_qup_is_flag_set(controller,
+					QUP_OP_OUT_BLOCK_WRITE_REQ))
+			break;
+
+	} while (remainder);
+}
+
 static int spi_qup_prep_sg(struct spi_master *master, struct spi_transfer *xfer,
 			   enum dma_transfer_direction dir,
 			   dma_async_tx_callback callback)
@@ -391,7 +477,8 @@ static int spi_qup_do_pio(struct spi_master *master, struct spi_transfer *xfer,
 		return ret;
 	}
 
-	spi_qup_fifo_write(qup, xfer);
+	if (qup->mode == QUP_IO_M_MODE_FIFO)
+		spi_qup_write(qup, xfer);
 
 	ret = spi_qup_set_state(qup, QUP_STATE_RUN);
 	if (ret) {
@@ -446,10 +533,10 @@ static irqreturn_t spi_qup_qup_irq(int irq, void *dev_id)
 		writel_relaxed(opflags, controller->base + QUP_OPERATIONAL);
 	} else {
 		if (opflags & QUP_OP_IN_SERVICE_FLAG)
-			spi_qup_fifo_read(controller, xfer);
+			spi_qup_read(controller, xfer);
 
 		if (opflags & QUP_OP_OUT_SERVICE_FLAG)
-			spi_qup_fifo_write(controller, xfer);
+			spi_qup_write(controller, xfer);
 	}
 
 	if ((opflags & QUP_OP_MAX_INPUT_DONE_FLAG) || error)
-- 
2.13.2

[PATCH v5 09/14] spi: qup: call io_config in mode specific function

[Varadarajan Narayanan]

DMA transactions should only only need to call io_config only once, but
block mode might call it several times to setup several transactions so
it can handle reads/writes larger than the max size per transaction, so
we move the call to the do_ functions.

This is just refactoring, there should be no functional change

Signed-off-by: Matthew McClintock <mmcclint-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
Signed-off-by: Varadarajan Narayanan <varada-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
---
 drivers/spi/spi-qup.c | 25 +++++++++++++++++--------
 1 file changed, 17 insertions(+), 8 deletions(-)

diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
index 82593f6..b2bda47 100644
--- a/drivers/spi/spi-qup.c
+++ b/drivers/spi/spi-qup.c
@@ -156,6 +156,8 @@ struct spi_qup {
 	struct dma_slave_config	tx_conf;
 };
 
+static int spi_qup_io_config(struct spi_device *spi, struct spi_transfer *xfer);
+
 static inline bool spi_qup_is_flag_set(struct spi_qup *controller, u32 flag)
 {
 	u32 opflag = readl_relaxed(controller->base + QUP_OPERATIONAL);
@@ -417,10 +419,12 @@ static void spi_qup_dma_terminate(struct spi_master *master,
 		dmaengine_terminate_all(master->dma_rx);
 }
 
-static int spi_qup_do_dma(struct spi_master *master, struct spi_transfer *xfer,
+static int spi_qup_do_dma(struct spi_device *spi, struct spi_transfer *xfer,
 			  unsigned long timeout)
 {
 	dma_async_tx_callback rx_done = NULL, tx_done = NULL;
+	struct spi_master *master = spi->master;
+	struct spi_qup *qup = spi_master_get_devdata(master);
 	int ret;
 
 	if (xfer->rx_buf)
@@ -428,6 +432,10 @@ static int spi_qup_do_dma(struct spi_master *master, struct spi_transfer *xfer,
 	else if (xfer->tx_buf)
 		tx_done = spi_qup_dma_done;
 
+	ret = spi_qup_io_config(spi, xfer);
+	if (ret)
+		return ret;
+
 	/* before issuing the descriptors, set the QUP to run */
 	ret = spi_qup_set_state(qup, QUP_STATE_RUN);
 	if (ret) {
@@ -461,12 +469,17 @@ static int spi_qup_do_dma(struct spi_master *master, struct spi_transfer *xfer,
 	return 0;
 }
 
-static int spi_qup_do_pio(struct spi_master *master, struct spi_transfer *xfer,
+static int spi_qup_do_pio(struct spi_device *spi, struct spi_transfer *xfer,
 			  unsigned long timeout)
 {
+	struct spi_master *master = spi->master;
 	struct spi_qup *qup = spi_master_get_devdata(master);
 	int ret;
 
+	ret = spi_qup_io_config(spi, xfer);
+	if (ret)
+		return ret;
+
 	ret = spi_qup_set_state(qup, QUP_STATE_RUN);
 	if (ret) {
 		dev_warn(qup->dev, "cannot set RUN state\n");
@@ -744,10 +757,6 @@ static int spi_qup_transfer_one(struct spi_master *master,
 	if (ret)
 		return ret;
 
-	ret = spi_qup_io_config(spi, xfer);
-	if (ret)
-		return ret;
-
 	timeout = DIV_ROUND_UP(xfer->speed_hz, MSEC_PER_SEC);
 	timeout = DIV_ROUND_UP(xfer->len * 8, timeout);
 	timeout = 100 * msecs_to_jiffies(timeout);
@@ -762,9 +771,9 @@ static int spi_qup_transfer_one(struct spi_master *master,
 	spin_unlock_irqrestore(&controller->lock, flags);
 
 	if (spi_qup_is_dma_xfer(controller->mode))
-		ret = spi_qup_do_dma(master, xfer, timeout);
+		ret = spi_qup_do_dma(spi, xfer, timeout);
 	else
-		ret = spi_qup_do_pio(master, xfer, timeout);
+		ret = spi_qup_do_pio(spi, xfer, timeout);
 
 	if (ret)
 		goto exit;
-- 
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[PATCH v5 09/14] spi: qup: call io_config in mode specific function

[Varadarajan Narayanan]

DMA transactions should only only need to call io_config only once, but
block mode might call it several times to setup several transactions so
it can handle reads/writes larger than the max size per transaction, so
we move the call to the do_ functions.

This is just refactoring, there should be no functional change

Signed-off-by: Matthew McClintock <mmcclint@codeaurora.org>
Signed-off-by: Varadarajan Narayanan <varada@codeaurora.org>
---
 drivers/spi/spi-qup.c | 25 +++++++++++++++++--------
 1 file changed, 17 insertions(+), 8 deletions(-)

diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
index 82593f6..b2bda47 100644
--- a/drivers/spi/spi-qup.c
+++ b/drivers/spi/spi-qup.c
@@ -156,6 +156,8 @@ struct spi_qup {
 	struct dma_slave_config	tx_conf;
 };
 
+static int spi_qup_io_config(struct spi_device *spi, struct spi_transfer *xfer);
+
 static inline bool spi_qup_is_flag_set(struct spi_qup *controller, u32 flag)
 {
 	u32 opflag = readl_relaxed(controller->base + QUP_OPERATIONAL);
@@ -417,10 +419,12 @@ static void spi_qup_dma_terminate(struct spi_master *master,
 		dmaengine_terminate_all(master->dma_rx);
 }
 
-static int spi_qup_do_dma(struct spi_master *master, struct spi_transfer *xfer,
+static int spi_qup_do_dma(struct spi_device *spi, struct spi_transfer *xfer,
 			  unsigned long timeout)
 {
 	dma_async_tx_callback rx_done = NULL, tx_done = NULL;
+	struct spi_master *master = spi->master;
+	struct spi_qup *qup = spi_master_get_devdata(master);
 	int ret;
 
 	if (xfer->rx_buf)
@@ -428,6 +432,10 @@ static int spi_qup_do_dma(struct spi_master *master, struct spi_transfer *xfer,
 	else if (xfer->tx_buf)
 		tx_done = spi_qup_dma_done;
 
+	ret = spi_qup_io_config(spi, xfer);
+	if (ret)
+		return ret;
+
 	/* before issuing the descriptors, set the QUP to run */
 	ret = spi_qup_set_state(qup, QUP_STATE_RUN);
 	if (ret) {
@@ -461,12 +469,17 @@ static int spi_qup_do_dma(struct spi_master *master, struct spi_transfer *xfer,
 	return 0;
 }
 
-static int spi_qup_do_pio(struct spi_master *master, struct spi_transfer *xfer,
+static int spi_qup_do_pio(struct spi_device *spi, struct spi_transfer *xfer,
 			  unsigned long timeout)
 {
+	struct spi_master *master = spi->master;
 	struct spi_qup *qup = spi_master_get_devdata(master);
 	int ret;
 
+	ret = spi_qup_io_config(spi, xfer);
+	if (ret)
+		return ret;
+
 	ret = spi_qup_set_state(qup, QUP_STATE_RUN);
 	if (ret) {
 		dev_warn(qup->dev, "cannot set RUN state\n");
@@ -744,10 +757,6 @@ static int spi_qup_transfer_one(struct spi_master *master,
 	if (ret)
 		return ret;
 
-	ret = spi_qup_io_config(spi, xfer);
-	if (ret)
-		return ret;
-
 	timeout = DIV_ROUND_UP(xfer->speed_hz, MSEC_PER_SEC);
 	timeout = DIV_ROUND_UP(xfer->len * 8, timeout);
 	timeout = 100 * msecs_to_jiffies(timeout);
@@ -762,9 +771,9 @@ static int spi_qup_transfer_one(struct spi_master *master,
 	spin_unlock_irqrestore(&controller->lock, flags);
 
 	if (spi_qup_is_dma_xfer(controller->mode))
-		ret = spi_qup_do_dma(master, xfer, timeout);
+		ret = spi_qup_do_dma(spi, xfer, timeout);
 	else
-		ret = spi_qup_do_pio(master, xfer, timeout);
+		ret = spi_qup_do_pio(spi, xfer, timeout);
 
 	if (ret)
 		goto exit;
-- 
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation

[PATCH v5 10/14] spi: qup: allow block mode to generate multiple transactions

[Varadarajan Narayanan]

This let's you write more to the SPI bus than 64K-1 which is important
if the block size of a SPI device is >= 64K or some other device wants
to do something larger.

This has the benefit of completely removing spi_message from the spi-qup
transactions

Signed-off-by: Matthew McClintock <mmcclint-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
Signed-off-by: Varadarajan Narayanan <varada-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
---
 drivers/spi/spi-qup.c | 128 +++++++++++++++++++++++++++++++-------------------
 1 file changed, 80 insertions(+), 48 deletions(-)

diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
index b2bda47..67e7463 100644
--- a/drivers/spi/spi-qup.c
+++ b/drivers/spi/spi-qup.c
@@ -120,7 +120,7 @@
 
 #define SPI_NUM_CHIPSELECTS		4
 
-#define SPI_MAX_DMA_XFER		(SZ_64K - 64)
+#define SPI_MAX_XFER			(SZ_64K - 64)
 
 /* high speed mode is when bus rate is greater then 26MHz */
 #define SPI_HS_MIN_RATE			26000000
@@ -149,6 +149,8 @@ struct spi_qup {
 	int			n_words;
 	int			tx_bytes;
 	int			rx_bytes;
+	const u8		*tx_buf;
+	u8			*rx_buf;
 	int			qup_v1;
 
 	int			mode;
@@ -173,6 +175,12 @@ static inline bool spi_qup_is_dma_xfer(int mode)
 	return false;
 }
 
+/* get's the transaction size length */
+static inline unsigned int spi_qup_len(struct spi_qup *controller)
+{
+	return controller->n_words * controller->w_size;
+}
+
 static inline bool spi_qup_is_valid_state(struct spi_qup *controller)
 {
 	u32 opstate = readl_relaxed(controller->base + QUP_STATE);
@@ -225,10 +233,9 @@ static int spi_qup_set_state(struct spi_qup *controller, u32 state)
 	return 0;
 }
 
-static void spi_qup_read_from_fifo(struct spi_qup *controller,
-	struct spi_transfer *xfer, u32 num_words)
+static void spi_qup_read_from_fifo(struct spi_qup *controller, u32 num_words)
 {
-	u8 *rx_buf = xfer->rx_buf;
+	u8 *rx_buf = controller->rx_buf;
 	int i, shift, num_bytes;
 	u32 word;
 
@@ -236,8 +243,9 @@ static void spi_qup_read_from_fifo(struct spi_qup *controller,
 
 		word = readl_relaxed(controller->base + QUP_INPUT_FIFO);
 
-		num_bytes = min_t(int, xfer->len - controller->rx_bytes,
-					controller->w_size);
+		num_bytes = min_t(int, spi_qup_len(controller) -
+				       controller->rx_bytes,
+				       controller->w_size);
 
 		if (!rx_buf) {
 			controller->rx_bytes += num_bytes;
@@ -258,13 +266,12 @@ static void spi_qup_read_from_fifo(struct spi_qup *controller,
 	}
 }
 
-static void spi_qup_read(struct spi_qup *controller,
-			    struct spi_transfer *xfer)
+static void spi_qup_read(struct spi_qup *controller)
 {
 	u32 remainder, words_per_block, num_words;
 	bool is_block_mode = controller->mode == QUP_IO_M_MODE_BLOCK;
 
-	remainder = DIV_ROUND_UP(xfer->len - controller->rx_bytes,
+	remainder = DIV_ROUND_UP(spi_qup_len(controller) - controller->rx_bytes,
 				 controller->w_size);
 	words_per_block = controller->in_blk_sz >> 2;
 
@@ -285,7 +292,7 @@ static void spi_qup_read(struct spi_qup *controller,
 		}
 
 		/* read up to the maximum transfer size available */
-		spi_qup_read_from_fifo(controller, xfer, num_words);
+		spi_qup_read_from_fifo(controller, num_words);
 
 		remainder -= num_words;
 
@@ -307,18 +314,18 @@ static void spi_qup_read(struct spi_qup *controller,
 
 }
 
-static void spi_qup_write_to_fifo(struct spi_qup *controller,
-	struct spi_transfer *xfer, u32 num_words)
+static void spi_qup_write_to_fifo(struct spi_qup *controller, u32 num_words)
 {
-	const u8 *tx_buf = xfer->tx_buf;
+	const u8 *tx_buf = controller->tx_buf;
 	int i, num_bytes;
 	u32 word, data;
 
 	for (; num_words; num_words--) {
 		word = 0;
 
-		num_bytes = min_t(int, xfer->len - controller->tx_bytes,
-				    controller->w_size);
+		num_bytes = min_t(int, spi_qup_len(controller) -
+				       controller->tx_bytes,
+				       controller->w_size);
 		if (tx_buf)
 			for (i = 0; i < num_bytes; i++) {
 				data = tx_buf[controller->tx_bytes + i];
@@ -338,13 +345,12 @@ static void spi_qup_dma_done(void *data)
 	complete(&qup->done);
 }
 
-static void spi_qup_write(struct spi_qup *controller,
-			    struct spi_transfer *xfer)
+static void spi_qup_write(struct spi_qup *controller)
 {
 	bool is_block_mode = controller->mode == QUP_IO_M_MODE_BLOCK;
 	u32 remainder, words_per_block, num_words;
 
-	remainder = DIV_ROUND_UP(xfer->len - controller->tx_bytes,
+	remainder = DIV_ROUND_UP(spi_qup_len(controller) - controller->tx_bytes,
 				 controller->w_size);
 	words_per_block = controller->out_blk_sz >> 2;
 
@@ -364,7 +370,7 @@ static void spi_qup_write(struct spi_qup *controller,
 			num_words = 1;
 		}
 
-		spi_qup_write_to_fifo(controller, xfer, num_words);
+		spi_qup_write_to_fifo(controller, num_words);
 
 		remainder -= num_words;
 
@@ -474,36 +480,62 @@ static int spi_qup_do_pio(struct spi_device *spi, struct spi_transfer *xfer,
 {
 	struct spi_master *master = spi->master;
 	struct spi_qup *qup = spi_master_get_devdata(master);
-	int ret;
+	int ret, n_words, iterations, offset = 0;
 
-	ret = spi_qup_io_config(spi, xfer);
-	if (ret)
-		return ret;
+	n_words = qup->n_words;
+	iterations = n_words / SPI_MAX_XFER; /* round down */
+	qup->rx_buf = xfer->rx_buf;
+	qup->tx_buf = xfer->tx_buf;
 
-	ret = spi_qup_set_state(qup, QUP_STATE_RUN);
-	if (ret) {
-		dev_warn(qup->dev, "cannot set RUN state\n");
-		return ret;
-	}
+	do {
+		if (iterations)
+			qup->n_words = SPI_MAX_XFER;
+		else
+			qup->n_words = n_words % SPI_MAX_XFER;
 
-	ret = spi_qup_set_state(qup, QUP_STATE_PAUSE);
-	if (ret) {
-		dev_warn(qup->dev, "cannot set PAUSE state\n");
-		return ret;
-	}
+		if (qup->tx_buf && offset)
+			qup->tx_buf = xfer->tx_buf + offset * SPI_MAX_XFER;
 
-	if (qup->mode == QUP_IO_M_MODE_FIFO)
-		spi_qup_write(qup, xfer);
+		if (qup->rx_buf && offset)
+			qup->rx_buf = xfer->rx_buf + offset * SPI_MAX_XFER;
 
-	ret = spi_qup_set_state(qup, QUP_STATE_RUN);
-	if (ret) {
-		dev_warn(qup->dev, "%s(%d): cannot set RUN state\n",
-				__func__, __LINE__);
-		return ret;
-	}
+		/*
+		 * if the transaction is small enough, we need
+		 * to fallback to FIFO mode
+		 */
+		if (qup->n_words <= (qup->in_fifo_sz / sizeof(u32)))
+			qup->mode = QUP_IO_M_MODE_FIFO;
 
-	if (!wait_for_completion_timeout(&qup->done, timeout))
-		return -ETIMEDOUT;
+		ret = spi_qup_io_config(spi, xfer);
+		if (ret)
+			return ret;
+
+		ret = spi_qup_set_state(qup, QUP_STATE_RUN);
+		if (ret) {
+			dev_warn(qup->dev, "cannot set RUN state\n");
+			return ret;
+		}
+
+		ret = spi_qup_set_state(qup, QUP_STATE_PAUSE);
+		if (ret) {
+			dev_warn(qup->dev, "cannot set PAUSE state\n");
+			return ret;
+		}
+
+		if (qup->mode == QUP_IO_M_MODE_FIFO)
+			spi_qup_write(qup);
+
+		ret = spi_qup_set_state(qup, QUP_STATE_RUN);
+		if (ret) {
+			dev_warn(qup->dev, "cannot set RUN state\n");
+			return ret;
+		}
+
+		if (!wait_for_completion_timeout(&qup->done, timeout))
+			return -ETIMEDOUT;
+
+		offset++;
+	} while (iterations--);
 
 	return 0;
 }
@@ -511,7 +543,6 @@ static int spi_qup_do_pio(struct spi_device *spi, struct spi_transfer *xfer,
 static irqreturn_t spi_qup_qup_irq(int irq, void *dev_id)
 {
 	struct spi_qup *controller = dev_id;
-	struct spi_transfer *xfer = controller->xfer;
 	u32 opflags, qup_err, spi_err;
 	int error = 0;
 
@@ -548,10 +579,10 @@ static irqreturn_t spi_qup_qup_irq(int irq, void *dev_id)
 		writel_relaxed(opflags, controller->base + QUP_OPERATIONAL);
 	} else {
 		if (opflags & QUP_OP_IN_SERVICE_FLAG)
-			spi_qup_read(controller, xfer);
+			spi_qup_read(controller);
 
 		if (opflags & QUP_OP_OUT_SERVICE_FLAG)
-			spi_qup_write(controller, xfer);
+			spi_qup_write(controller);
 	}
 
 	if ((opflags & QUP_OP_MAX_INPUT_DONE_FLAG) || error)
@@ -758,7 +789,8 @@ static int spi_qup_transfer_one(struct spi_master *master,
 		return ret;
 
 	timeout = DIV_ROUND_UP(xfer->speed_hz, MSEC_PER_SEC);
-	timeout = DIV_ROUND_UP(xfer->len * 8, timeout);
+	timeout = DIV_ROUND_UP(min_t(unsigned long, SPI_MAX_XFER,
+				     xfer->len) * 8, timeout);
 	timeout = 100 * msecs_to_jiffies(timeout);
 
 	reinit_completion(&controller->done);
@@ -972,7 +1004,7 @@ static int spi_qup_probe(struct platform_device *pdev)
 	master->dev.of_node = pdev->dev.of_node;
 	master->auto_runtime_pm = true;
 	master->dma_alignment = dma_get_cache_alignment();
-	master->max_dma_len = SPI_MAX_DMA_XFER;
+	master->max_dma_len = SPI_MAX_XFER;
 
 	platform_set_drvdata(pdev, master);
 
-- 
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[PATCH v5 10/14] spi: qup: allow block mode to generate multiple transactions

[Varadarajan Narayanan]

This let's you write more to the SPI bus than 64K-1 which is important
if the block size of a SPI device is >= 64K or some other device wants
to do something larger.

This has the benefit of completely removing spi_message from the spi-qup
transactions

Signed-off-by: Matthew McClintock <mmcclint@codeaurora.org>
Signed-off-by: Varadarajan Narayanan <varada@codeaurora.org>
---
 drivers/spi/spi-qup.c | 128 +++++++++++++++++++++++++++++++-------------------
 1 file changed, 80 insertions(+), 48 deletions(-)

diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
index b2bda47..67e7463 100644
--- a/drivers/spi/spi-qup.c
+++ b/drivers/spi/spi-qup.c
@@ -120,7 +120,7 @@
 
 #define SPI_NUM_CHIPSELECTS		4
 
-#define SPI_MAX_DMA_XFER		(SZ_64K - 64)
+#define SPI_MAX_XFER			(SZ_64K - 64)
 
 /* high speed mode is when bus rate is greater then 26MHz */
 #define SPI_HS_MIN_RATE			26000000
@@ -149,6 +149,8 @@ struct spi_qup {
 	int			n_words;
 	int			tx_bytes;
 	int			rx_bytes;
+	const u8		*tx_buf;
+	u8			*rx_buf;
 	int			qup_v1;
 
 	int			mode;
@@ -173,6 +175,12 @@ static inline bool spi_qup_is_dma_xfer(int mode)
 	return false;
 }
 
+/* get's the transaction size length */
+static inline unsigned int spi_qup_len(struct spi_qup *controller)
+{
+	return controller->n_words * controller->w_size;
+}
+
 static inline bool spi_qup_is_valid_state(struct spi_qup *controller)
 {
 	u32 opstate = readl_relaxed(controller->base + QUP_STATE);
@@ -225,10 +233,9 @@ static int spi_qup_set_state(struct spi_qup *controller, u32 state)
 	return 0;
 }
 
-static void spi_qup_read_from_fifo(struct spi_qup *controller,
-	struct spi_transfer *xfer, u32 num_words)
+static void spi_qup_read_from_fifo(struct spi_qup *controller, u32 num_words)
 {
-	u8 *rx_buf = xfer->rx_buf;
+	u8 *rx_buf = controller->rx_buf;
 	int i, shift, num_bytes;
 	u32 word;
 
@@ -236,8 +243,9 @@ static void spi_qup_read_from_fifo(struct spi_qup *controller,
 
 		word = readl_relaxed(controller->base + QUP_INPUT_FIFO);
 
-		num_bytes = min_t(int, xfer->len - controller->rx_bytes,
-					controller->w_size);
+		num_bytes = min_t(int, spi_qup_len(controller) -
+				       controller->rx_bytes,
+				       controller->w_size);
 
 		if (!rx_buf) {
 			controller->rx_bytes += num_bytes;
@@ -258,13 +266,12 @@ static void spi_qup_read_from_fifo(struct spi_qup *controller,
 	}
 }
 
-static void spi_qup_read(struct spi_qup *controller,
-			    struct spi_transfer *xfer)
+static void spi_qup_read(struct spi_qup *controller)
 {
 	u32 remainder, words_per_block, num_words;
 	bool is_block_mode = controller->mode == QUP_IO_M_MODE_BLOCK;
 
-	remainder = DIV_ROUND_UP(xfer->len - controller->rx_bytes,
+	remainder = DIV_ROUND_UP(spi_qup_len(controller) - controller->rx_bytes,
 				 controller->w_size);
 	words_per_block = controller->in_blk_sz >> 2;
 
@@ -285,7 +292,7 @@ static void spi_qup_read(struct spi_qup *controller,
 		}
 
 		/* read up to the maximum transfer size available */
-		spi_qup_read_from_fifo(controller, xfer, num_words);
+		spi_qup_read_from_fifo(controller, num_words);
 
 		remainder -= num_words;
 
@@ -307,18 +314,18 @@ static void spi_qup_read(struct spi_qup *controller,
 
 }
 
-static void spi_qup_write_to_fifo(struct spi_qup *controller,
-	struct spi_transfer *xfer, u32 num_words)
+static void spi_qup_write_to_fifo(struct spi_qup *controller, u32 num_words)
 {
-	const u8 *tx_buf = xfer->tx_buf;
+	const u8 *tx_buf = controller->tx_buf;
 	int i, num_bytes;
 	u32 word, data;
 
 	for (; num_words; num_words--) {
 		word = 0;
 
-		num_bytes = min_t(int, xfer->len - controller->tx_bytes,
-				    controller->w_size);
+		num_bytes = min_t(int, spi_qup_len(controller) -
+				       controller->tx_bytes,
+				       controller->w_size);
 		if (tx_buf)
 			for (i = 0; i < num_bytes; i++) {
 				data = tx_buf[controller->tx_bytes + i];
@@ -338,13 +345,12 @@ static void spi_qup_dma_done(void *data)
 	complete(&qup->done);
 }
 
-static void spi_qup_write(struct spi_qup *controller,
-			    struct spi_transfer *xfer)
+static void spi_qup_write(struct spi_qup *controller)
 {
 	bool is_block_mode = controller->mode == QUP_IO_M_MODE_BLOCK;
 	u32 remainder, words_per_block, num_words;
 
-	remainder = DIV_ROUND_UP(xfer->len - controller->tx_bytes,
+	remainder = DIV_ROUND_UP(spi_qup_len(controller) - controller->tx_bytes,
 				 controller->w_size);
 	words_per_block = controller->out_blk_sz >> 2;
 
@@ -364,7 +370,7 @@ static void spi_qup_write(struct spi_qup *controller,
 			num_words = 1;
 		}
 
-		spi_qup_write_to_fifo(controller, xfer, num_words);
+		spi_qup_write_to_fifo(controller, num_words);
 
 		remainder -= num_words;
 
@@ -474,36 +480,62 @@ static int spi_qup_do_pio(struct spi_device *spi, struct spi_transfer *xfer,
 {
 	struct spi_master *master = spi->master;
 	struct spi_qup *qup = spi_master_get_devdata(master);
-	int ret;
+	int ret, n_words, iterations, offset = 0;
 
-	ret = spi_qup_io_config(spi, xfer);
-	if (ret)
-		return ret;
+	n_words = qup->n_words;
+	iterations = n_words / SPI_MAX_XFER; /* round down */
+	qup->rx_buf = xfer->rx_buf;
+	qup->tx_buf = xfer->tx_buf;
 
-	ret = spi_qup_set_state(qup, QUP_STATE_RUN);
-	if (ret) {
-		dev_warn(qup->dev, "cannot set RUN state\n");
-		return ret;
-	}
+	do {
+		if (iterations)
+			qup->n_words = SPI_MAX_XFER;
+		else
+			qup->n_words = n_words % SPI_MAX_XFER;
 
-	ret = spi_qup_set_state(qup, QUP_STATE_PAUSE);
-	if (ret) {
-		dev_warn(qup->dev, "cannot set PAUSE state\n");
-		return ret;
-	}
+		if (qup->tx_buf && offset)
+			qup->tx_buf = xfer->tx_buf + offset * SPI_MAX_XFER;
 
-	if (qup->mode == QUP_IO_M_MODE_FIFO)
-		spi_qup_write(qup, xfer);
+		if (qup->rx_buf && offset)
+			qup->rx_buf = xfer->rx_buf + offset * SPI_MAX_XFER;
 
-	ret = spi_qup_set_state(qup, QUP_STATE_RUN);
-	if (ret) {
-		dev_warn(qup->dev, "%s(%d): cannot set RUN state\n",
-				__func__, __LINE__);
-		return ret;
-	}
+		/*
+		 * if the transaction is small enough, we need
+		 * to fallback to FIFO mode
+		 */
+		if (qup->n_words <= (qup->in_fifo_sz / sizeof(u32)))
+			qup->mode = QUP_IO_M_MODE_FIFO;
 
-	if (!wait_for_completion_timeout(&qup->done, timeout))
-		return -ETIMEDOUT;
+		ret = spi_qup_io_config(spi, xfer);
+		if (ret)
+			return ret;
+
+		ret = spi_qup_set_state(qup, QUP_STATE_RUN);
+		if (ret) {
+			dev_warn(qup->dev, "cannot set RUN state\n");
+			return ret;
+		}
+
+		ret = spi_qup_set_state(qup, QUP_STATE_PAUSE);
+		if (ret) {
+			dev_warn(qup->dev, "cannot set PAUSE state\n");
+			return ret;
+		}
+
+		if (qup->mode == QUP_IO_M_MODE_FIFO)
+			spi_qup_write(qup);
+
+		ret = spi_qup_set_state(qup, QUP_STATE_RUN);
+		if (ret) {
+			dev_warn(qup->dev, "cannot set RUN state\n");
+			return ret;
+		}
+
+		if (!wait_for_completion_timeout(&qup->done, timeout))
+			return -ETIMEDOUT;
+
+		offset++;
+	} while (iterations--);
 
 	return 0;
 }
@@ -511,7 +543,6 @@ static int spi_qup_do_pio(struct spi_device *spi, struct spi_transfer *xfer,
 static irqreturn_t spi_qup_qup_irq(int irq, void *dev_id)
 {
 	struct spi_qup *controller = dev_id;
-	struct spi_transfer *xfer = controller->xfer;
 	u32 opflags, qup_err, spi_err;
 	int error = 0;
 
@@ -548,10 +579,10 @@ static irqreturn_t spi_qup_qup_irq(int irq, void *dev_id)
 		writel_relaxed(opflags, controller->base + QUP_OPERATIONAL);
 	} else {
 		if (opflags & QUP_OP_IN_SERVICE_FLAG)
-			spi_qup_read(controller, xfer);
+			spi_qup_read(controller);
 
 		if (opflags & QUP_OP_OUT_SERVICE_FLAG)
-			spi_qup_write(controller, xfer);
+			spi_qup_write(controller);
 	}
 
 	if ((opflags & QUP_OP_MAX_INPUT_DONE_FLAG) || error)
@@ -758,7 +789,8 @@ static int spi_qup_transfer_one(struct spi_master *master,
 		return ret;
 
 	timeout = DIV_ROUND_UP(xfer->speed_hz, MSEC_PER_SEC);
-	timeout = DIV_ROUND_UP(xfer->len * 8, timeout);
+	timeout = DIV_ROUND_UP(min_t(unsigned long, SPI_MAX_XFER,
+				     xfer->len) * 8, timeout);
 	timeout = 100 * msecs_to_jiffies(timeout);
 
 	reinit_completion(&controller->done);
@@ -972,7 +1004,7 @@ static int spi_qup_probe(struct platform_device *pdev)
 	master->dev.of_node = pdev->dev.of_node;
 	master->auto_runtime_pm = true;
 	master->dma_alignment = dma_get_cache_alignment();
-	master->max_dma_len = SPI_MAX_DMA_XFER;
+	master->max_dma_len = SPI_MAX_XFER;
 
 	platform_set_drvdata(pdev, master);
 
-- 
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation

Applied "spi: qup: allow block mode to generate multiple transactions" to the spi tree

[Mark Brown]

The patch

   spi: qup: allow block mode to generate multiple transactions

has been applied to the spi tree at

   git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 5dc47fefe1d470da47dd400796bbf93ffe82fd33 Mon Sep 17 00:00:00 2001
From: Varadarajan Narayanan <varada@codeaurora.org>
Date: Fri, 28 Jul 2017 12:22:57 +0530
Subject: [PATCH] spi: qup: allow block mode to generate multiple transactions

This let's you write more to the SPI bus than 64K-1 which is important
if the block size of a SPI device is >= 64K or some other device wants
to do something larger.

This has the benefit of completely removing spi_message from the spi-qup
transactions

Signed-off-by: Matthew McClintock <mmcclint@codeaurora.org>
Signed-off-by: Varadarajan Narayanan <varada@codeaurora.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/spi/spi-qup.c | 128 +++++++++++++++++++++++++++++++-------------------
 1 file changed, 80 insertions(+), 48 deletions(-)

diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
index 1aa60785bf98..707b1ec427fa 100644
--- a/drivers/spi/spi-qup.c
+++ b/drivers/spi/spi-qup.c
@@ -120,7 +120,7 @@
 
 #define SPI_NUM_CHIPSELECTS		4
 
-#define SPI_MAX_DMA_XFER		(SZ_64K - 64)
+#define SPI_MAX_XFER			(SZ_64K - 64)
 
 /* high speed mode is when bus rate is greater then 26MHz */
 #define SPI_HS_MIN_RATE			26000000
@@ -149,6 +149,8 @@ struct spi_qup {
 	int			n_words;
 	int			tx_bytes;
 	int			rx_bytes;
+	const u8		*tx_buf;
+	u8			*rx_buf;
 	int			qup_v1;
 
 	int			mode;
@@ -173,6 +175,12 @@ static inline bool spi_qup_is_dma_xfer(int mode)
 	return false;
 }
 
+/* get's the transaction size length */
+static inline unsigned int spi_qup_len(struct spi_qup *controller)
+{
+	return controller->n_words * controller->w_size;
+}
+
 static inline bool spi_qup_is_valid_state(struct spi_qup *controller)
 {
 	u32 opstate = readl_relaxed(controller->base + QUP_STATE);
@@ -225,10 +233,9 @@ static int spi_qup_set_state(struct spi_qup *controller, u32 state)
 	return 0;
 }
 
-static void spi_qup_read_from_fifo(struct spi_qup *controller,
-	struct spi_transfer *xfer, u32 num_words)
+static void spi_qup_read_from_fifo(struct spi_qup *controller, u32 num_words)
 {
-	u8 *rx_buf = xfer->rx_buf;
+	u8 *rx_buf = controller->rx_buf;
 	int i, shift, num_bytes;
 	u32 word;
 
@@ -236,8 +243,9 @@ static void spi_qup_read_from_fifo(struct spi_qup *controller,
 
 		word = readl_relaxed(controller->base + QUP_INPUT_FIFO);
 
-		num_bytes = min_t(int, xfer->len - controller->rx_bytes,
-					controller->w_size);
+		num_bytes = min_t(int, spi_qup_len(controller) -
+				       controller->rx_bytes,
+				       controller->w_size);
 
 		if (!rx_buf) {
 			controller->rx_bytes += num_bytes;
@@ -258,13 +266,12 @@ static void spi_qup_read_from_fifo(struct spi_qup *controller,
 	}
 }
 
-static void spi_qup_read(struct spi_qup *controller,
-			    struct spi_transfer *xfer)
+static void spi_qup_read(struct spi_qup *controller)
 {
 	u32 remainder, words_per_block, num_words;
 	bool is_block_mode = controller->mode == QUP_IO_M_MODE_BLOCK;
 
-	remainder = DIV_ROUND_UP(xfer->len - controller->rx_bytes,
+	remainder = DIV_ROUND_UP(spi_qup_len(controller) - controller->rx_bytes,
 				 controller->w_size);
 	words_per_block = controller->in_blk_sz >> 2;
 
@@ -285,7 +292,7 @@ static void spi_qup_read(struct spi_qup *controller,
 		}
 
 		/* read up to the maximum transfer size available */
-		spi_qup_read_from_fifo(controller, xfer, num_words);
+		spi_qup_read_from_fifo(controller, num_words);
 
 		remainder -= num_words;
 
@@ -307,18 +314,18 @@ static void spi_qup_read(struct spi_qup *controller,
 
 }
 
-static void spi_qup_write_to_fifo(struct spi_qup *controller,
-	struct spi_transfer *xfer, u32 num_words)
+static void spi_qup_write_to_fifo(struct spi_qup *controller, u32 num_words)
 {
-	const u8 *tx_buf = xfer->tx_buf;
+	const u8 *tx_buf = controller->tx_buf;
 	int i, num_bytes;
 	u32 word, data;
 
 	for (; num_words; num_words--) {
 		word = 0;
 
-		num_bytes = min_t(int, xfer->len - controller->tx_bytes,
-				    controller->w_size);
+		num_bytes = min_t(int, spi_qup_len(controller) -
+				       controller->tx_bytes,
+				       controller->w_size);
 		if (tx_buf)
 			for (i = 0; i < num_bytes; i++) {
 				data = tx_buf[controller->tx_bytes + i];
@@ -338,13 +345,12 @@ static void spi_qup_dma_done(void *data)
 	complete(&qup->done);
 }
 
-static void spi_qup_write(struct spi_qup *controller,
-			    struct spi_transfer *xfer)
+static void spi_qup_write(struct spi_qup *controller)
 {
 	bool is_block_mode = controller->mode == QUP_IO_M_MODE_BLOCK;
 	u32 remainder, words_per_block, num_words;
 
-	remainder = DIV_ROUND_UP(xfer->len - controller->tx_bytes,
+	remainder = DIV_ROUND_UP(spi_qup_len(controller) - controller->tx_bytes,
 				 controller->w_size);
 	words_per_block = controller->out_blk_sz >> 2;
 
@@ -364,7 +370,7 @@ static void spi_qup_write(struct spi_qup *controller,
 			num_words = 1;
 		}
 
-		spi_qup_write_to_fifo(controller, xfer, num_words);
+		spi_qup_write_to_fifo(controller, num_words);
 
 		remainder -= num_words;
 
@@ -471,36 +477,62 @@ static int spi_qup_do_pio(struct spi_device *spi, struct spi_transfer *xfer,
 {
 	struct spi_master *master = spi->master;
 	struct spi_qup *qup = spi_master_get_devdata(master);
-	int ret;
+	int ret, n_words, iterations, offset = 0;
 
-	ret = spi_qup_io_config(spi, xfer);
-	if (ret)
-		return ret;
+	n_words = qup->n_words;
+	iterations = n_words / SPI_MAX_XFER; /* round down */
+	qup->rx_buf = xfer->rx_buf;
+	qup->tx_buf = xfer->tx_buf;
 
-	ret = spi_qup_set_state(qup, QUP_STATE_RUN);
-	if (ret) {
-		dev_warn(qup->dev, "cannot set RUN state\n");
-		return ret;
-	}
+	do {
+		if (iterations)
+			qup->n_words = SPI_MAX_XFER;
+		else
+			qup->n_words = n_words % SPI_MAX_XFER;
 
-	ret = spi_qup_set_state(qup, QUP_STATE_PAUSE);
-	if (ret) {
-		dev_warn(qup->dev, "cannot set PAUSE state\n");
-		return ret;
-	}
+		if (qup->tx_buf && offset)
+			qup->tx_buf = xfer->tx_buf + offset * SPI_MAX_XFER;
 
-	if (qup->mode == QUP_IO_M_MODE_FIFO)
-		spi_qup_write(qup, xfer);
+		if (qup->rx_buf && offset)
+			qup->rx_buf = xfer->rx_buf + offset * SPI_MAX_XFER;
 
-	ret = spi_qup_set_state(qup, QUP_STATE_RUN);
-	if (ret) {
-		dev_warn(qup->dev, "%s(%d): cannot set RUN state\n",
-				__func__, __LINE__);
-		return ret;
-	}
+		/*
+		 * if the transaction is small enough, we need
+		 * to fallback to FIFO mode
+		 */
+		if (qup->n_words <= (qup->in_fifo_sz / sizeof(u32)))
+			qup->mode = QUP_IO_M_MODE_FIFO;
 
-	if (!wait_for_completion_timeout(&qup->done, timeout))
-		return -ETIMEDOUT;
+		ret = spi_qup_io_config(spi, xfer);
+		if (ret)
+			return ret;
+
+		ret = spi_qup_set_state(qup, QUP_STATE_RUN);
+		if (ret) {
+			dev_warn(qup->dev, "cannot set RUN state\n");
+			return ret;
+		}
+
+		ret = spi_qup_set_state(qup, QUP_STATE_PAUSE);
+		if (ret) {
+			dev_warn(qup->dev, "cannot set PAUSE state\n");
+			return ret;
+		}
+
+		if (qup->mode == QUP_IO_M_MODE_FIFO)
+			spi_qup_write(qup);
+
+		ret = spi_qup_set_state(qup, QUP_STATE_RUN);
+		if (ret) {
+			dev_warn(qup->dev, "cannot set RUN state\n");
+			return ret;
+		}
+
+		if (!wait_for_completion_timeout(&qup->done, timeout))
+			return -ETIMEDOUT;
+
+		offset++;
+	} while (iterations--);
 
 	return 0;
 }
@@ -508,7 +540,6 @@ static int spi_qup_do_pio(struct spi_device *spi, struct spi_transfer *xfer,
 static irqreturn_t spi_qup_qup_irq(int irq, void *dev_id)
 {
 	struct spi_qup *controller = dev_id;
-	struct spi_transfer *xfer = controller->xfer;
 	u32 opflags, qup_err, spi_err;
 	int error = 0;
 
@@ -545,10 +576,10 @@ static irqreturn_t spi_qup_qup_irq(int irq, void *dev_id)
 		writel_relaxed(opflags, controller->base + QUP_OPERATIONAL);
 	} else {
 		if (opflags & QUP_OP_IN_SERVICE_FLAG)
-			spi_qup_read(controller, xfer);
+			spi_qup_read(controller);
 
 		if (opflags & QUP_OP_OUT_SERVICE_FLAG)
-			spi_qup_write(controller, xfer);
+			spi_qup_write(controller);
 	}
 
 	if ((opflags & QUP_OP_MAX_INPUT_DONE_FLAG) || error)
@@ -755,7 +786,8 @@ static int spi_qup_transfer_one(struct spi_master *master,
 		return ret;
 
 	timeout = DIV_ROUND_UP(xfer->speed_hz, MSEC_PER_SEC);
-	timeout = DIV_ROUND_UP(xfer->len * 8, timeout);
+	timeout = DIV_ROUND_UP(min_t(unsigned long, SPI_MAX_XFER,
+				     xfer->len) * 8, timeout);
 	timeout = 100 * msecs_to_jiffies(timeout);
 
 	reinit_completion(&controller->done);
@@ -969,7 +1001,7 @@ static int spi_qup_probe(struct platform_device *pdev)
 	master->dev.of_node = pdev->dev.of_node;
 	master->auto_runtime_pm = true;
 	master->dma_alignment = dma_get_cache_alignment();
-	master->max_dma_len = SPI_MAX_DMA_XFER;
+	master->max_dma_len = SPI_MAX_XFER;
 
 	platform_set_drvdata(pdev, master);
 
-- 
2.13.2

Applied "spi: qup: allow block mode to generate multiple transactions" to the spi tree

[Mark Brown]

The patch

   spi: qup: allow block mode to generate multiple transactions

has been applied to the spi tree at

   git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 5dc47fefe1d470da47dd400796bbf93ffe82fd33 Mon Sep 17 00:00:00 2001
From: Varadarajan Narayanan <varada@codeaurora.org>
Date: Fri, 28 Jul 2017 12:22:57 +0530
Subject: [PATCH] spi: qup: allow block mode to generate multiple transactions

This let's you write more to the SPI bus than 64K-1 which is important
if the block size of a SPI device is >= 64K or some other device wants
to do something larger.

This has the benefit of completely removing spi_message from the spi-qup
transactions

Signed-off-by: Matthew McClintock <mmcclint@codeaurora.org>
Signed-off-by: Varadarajan Narayanan <varada@codeaurora.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/spi/spi-qup.c | 128 +++++++++++++++++++++++++++++++-------------------
 1 file changed, 80 insertions(+), 48 deletions(-)

diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
index 1aa60785bf98..707b1ec427fa 100644
--- a/drivers/spi/spi-qup.c
+++ b/drivers/spi/spi-qup.c
@@ -120,7 +120,7 @@
 
 #define SPI_NUM_CHIPSELECTS		4
 
-#define SPI_MAX_DMA_XFER		(SZ_64K - 64)
+#define SPI_MAX_XFER			(SZ_64K - 64)
 
 /* high speed mode is when bus rate is greater then 26MHz */
 #define SPI_HS_MIN_RATE			26000000
@@ -149,6 +149,8 @@ struct spi_qup {
 	int			n_words;
 	int			tx_bytes;
 	int			rx_bytes;
+	const u8		*tx_buf;
+	u8			*rx_buf;
 	int			qup_v1;
 
 	int			mode;
@@ -173,6 +175,12 @@ static inline bool spi_qup_is_dma_xfer(int mode)
 	return false;
 }
 
+/* get's the transaction size length */
+static inline unsigned int spi_qup_len(struct spi_qup *controller)
+{
+	return controller->n_words * controller->w_size;
+}
+
 static inline bool spi_qup_is_valid_state(struct spi_qup *controller)
 {
 	u32 opstate = readl_relaxed(controller->base + QUP_STATE);
@@ -225,10 +233,9 @@ static int spi_qup_set_state(struct spi_qup *controller, u32 state)
 	return 0;
 }
 
-static void spi_qup_read_from_fifo(struct spi_qup *controller,
-	struct spi_transfer *xfer, u32 num_words)
+static void spi_qup_read_from_fifo(struct spi_qup *controller, u32 num_words)
 {
-	u8 *rx_buf = xfer->rx_buf;
+	u8 *rx_buf = controller->rx_buf;
 	int i, shift, num_bytes;
 	u32 word;
 
@@ -236,8 +243,9 @@ static void spi_qup_read_from_fifo(struct spi_qup *controller,
 
 		word = readl_relaxed(controller->base + QUP_INPUT_FIFO);
 
-		num_bytes = min_t(int, xfer->len - controller->rx_bytes,
-					controller->w_size);
+		num_bytes = min_t(int, spi_qup_len(controller) -
+				       controller->rx_bytes,
+				       controller->w_size);
 
 		if (!rx_buf) {
 			controller->rx_bytes += num_bytes;
@@ -258,13 +266,12 @@ static void spi_qup_read_from_fifo(struct spi_qup *controller,
 	}
 }
 
-static void spi_qup_read(struct spi_qup *controller,
-			    struct spi_transfer *xfer)
+static void spi_qup_read(struct spi_qup *controller)
 {
 	u32 remainder, words_per_block, num_words;
 	bool is_block_mode = controller->mode == QUP_IO_M_MODE_BLOCK;
 
-	remainder = DIV_ROUND_UP(xfer->len - controller->rx_bytes,
+	remainder = DIV_ROUND_UP(spi_qup_len(controller) - controller->rx_bytes,
 				 controller->w_size);
 	words_per_block = controller->in_blk_sz >> 2;
 
@@ -285,7 +292,7 @@ static void spi_qup_read(struct spi_qup *controller,
 		}
 
 		/* read up to the maximum transfer size available */
-		spi_qup_read_from_fifo(controller, xfer, num_words);
+		spi_qup_read_from_fifo(controller, num_words);
 
 		remainder -= num_words;
 
@@ -307,18 +314,18 @@ static void spi_qup_read(struct spi_qup *controller,
 
 }
 
-static void spi_qup_write_to_fifo(struct spi_qup *controller,
-	struct spi_transfer *xfer, u32 num_words)
+static void spi_qup_write_to_fifo(struct spi_qup *controller, u32 num_words)
 {
-	const u8 *tx_buf = xfer->tx_buf;
+	const u8 *tx_buf = controller->tx_buf;
 	int i, num_bytes;
 	u32 word, data;
 
 	for (; num_words; num_words--) {
 		word = 0;
 
-		num_bytes = min_t(int, xfer->len - controller->tx_bytes,
-				    controller->w_size);
+		num_bytes = min_t(int, spi_qup_len(controller) -
+				       controller->tx_bytes,
+				       controller->w_size);
 		if (tx_buf)
 			for (i = 0; i < num_bytes; i++) {
 				data = tx_buf[controller->tx_bytes + i];
@@ -338,13 +345,12 @@ static void spi_qup_dma_done(void *data)
 	complete(&qup->done);
 }
 
-static void spi_qup_write(struct spi_qup *controller,
-			    struct spi_transfer *xfer)
+static void spi_qup_write(struct spi_qup *controller)
 {
 	bool is_block_mode = controller->mode == QUP_IO_M_MODE_BLOCK;
 	u32 remainder, words_per_block, num_words;
 
-	remainder = DIV_ROUND_UP(xfer->len - controller->tx_bytes,
+	remainder = DIV_ROUND_UP(spi_qup_len(controller) - controller->tx_bytes,
 				 controller->w_size);
 	words_per_block = controller->out_blk_sz >> 2;
 
@@ -364,7 +370,7 @@ static void spi_qup_write(struct spi_qup *controller,
 			num_words = 1;
 		}
 
-		spi_qup_write_to_fifo(controller, xfer, num_words);
+		spi_qup_write_to_fifo(controller, num_words);
 
 		remainder -= num_words;
 
@@ -471,36 +477,62 @@ static int spi_qup_do_pio(struct spi_device *spi, struct spi_transfer *xfer,
 {
 	struct spi_master *master = spi->master;
 	struct spi_qup *qup = spi_master_get_devdata(master);
-	int ret;
+	int ret, n_words, iterations, offset = 0;
 
-	ret = spi_qup_io_config(spi, xfer);
-	if (ret)
-		return ret;
+	n_words = qup->n_words;
+	iterations = n_words / SPI_MAX_XFER; /* round down */
+	qup->rx_buf = xfer->rx_buf;
+	qup->tx_buf = xfer->tx_buf;
 
-	ret = spi_qup_set_state(qup, QUP_STATE_RUN);
-	if (ret) {
-		dev_warn(qup->dev, "cannot set RUN state\n");
-		return ret;
-	}
+	do {
+		if (iterations)
+			qup->n_words = SPI_MAX_XFER;
+		else
+			qup->n_words = n_words % SPI_MAX_XFER;
 
-	ret = spi_qup_set_state(qup, QUP_STATE_PAUSE);
-	if (ret) {
-		dev_warn(qup->dev, "cannot set PAUSE state\n");
-		return ret;
-	}
+		if (qup->tx_buf && offset)
+			qup->tx_buf = xfer->tx_buf + offset * SPI_MAX_XFER;
 
-	if (qup->mode == QUP_IO_M_MODE_FIFO)
-		spi_qup_write(qup, xfer);
+		if (qup->rx_buf && offset)
+			qup->rx_buf = xfer->rx_buf + offset * SPI_MAX_XFER;
 
-	ret = spi_qup_set_state(qup, QUP_STATE_RUN);
-	if (ret) {
-		dev_warn(qup->dev, "%s(%d): cannot set RUN state\n",
-				__func__, __LINE__);
-		return ret;
-	}
+		/*
+		 * if the transaction is small enough, we need
+		 * to fallback to FIFO mode
+		 */
+		if (qup->n_words <= (qup->in_fifo_sz / sizeof(u32)))
+			qup->mode = QUP_IO_M_MODE_FIFO;
 
-	if (!wait_for_completion_timeout(&qup->done, timeout))
-		return -ETIMEDOUT;
+		ret = spi_qup_io_config(spi, xfer);
+		if (ret)
+			return ret;
+
+		ret = spi_qup_set_state(qup, QUP_STATE_RUN);
+		if (ret) {
+			dev_warn(qup->dev, "cannot set RUN state\n");
+			return ret;
+		}
+
+		ret = spi_qup_set_state(qup, QUP_STATE_PAUSE);
+		if (ret) {
+			dev_warn(qup->dev, "cannot set PAUSE state\n");
+			return ret;
+		}
+
+		if (qup->mode == QUP_IO_M_MODE_FIFO)
+			spi_qup_write(qup);
+
+		ret = spi_qup_set_state(qup, QUP_STATE_RUN);
+		if (ret) {
+			dev_warn(qup->dev, "cannot set RUN state\n");
+			return ret;
+		}
+
+		if (!wait_for_completion_timeout(&qup->done, timeout))
+			return -ETIMEDOUT;
+
+		offset++;
+	} while (iterations--);
 
 	return 0;
 }
@@ -508,7 +540,6 @@ static int spi_qup_do_pio(struct spi_device *spi, struct spi_transfer *xfer,
 static irqreturn_t spi_qup_qup_irq(int irq, void *dev_id)
 {
 	struct spi_qup *controller = dev_id;
-	struct spi_transfer *xfer = controller->xfer;
 	u32 opflags, qup_err, spi_err;
 	int error = 0;
 
@@ -545,10 +576,10 @@ static irqreturn_t spi_qup_qup_irq(int irq, void *dev_id)
 		writel_relaxed(opflags, controller->base + QUP_OPERATIONAL);
 	} else {
 		if (opflags & QUP_OP_IN_SERVICE_FLAG)
-			spi_qup_read(controller, xfer);
+			spi_qup_read(controller);
 
 		if (opflags & QUP_OP_OUT_SERVICE_FLAG)
-			spi_qup_write(controller, xfer);
+			spi_qup_write(controller);
 	}
 
 	if ((opflags & QUP_OP_MAX_INPUT_DONE_FLAG) || error)
@@ -755,7 +786,8 @@ static int spi_qup_transfer_one(struct spi_master *master,
 		return ret;
 
 	timeout = DIV_ROUND_UP(xfer->speed_hz, MSEC_PER_SEC);
-	timeout = DIV_ROUND_UP(xfer->len * 8, timeout);
+	timeout = DIV_ROUND_UP(min_t(unsigned long, SPI_MAX_XFER,
+				     xfer->len) * 8, timeout);
 	timeout = 100 * msecs_to_jiffies(timeout);
 
 	reinit_completion(&controller->done);
@@ -969,7 +1001,7 @@ static int spi_qup_probe(struct platform_device *pdev)
 	master->dev.of_node = pdev->dev.of_node;
 	master->auto_runtime_pm = true;
 	master->dma_alignment = dma_get_cache_alignment();
-	master->max_dma_len = SPI_MAX_DMA_XFER;
+	master->max_dma_len = SPI_MAX_XFER;
 
 	platform_set_drvdata(pdev, master);
 
-- 
2.13.2

[PATCH v5 11/14] spi: qup: refactor spi_qup_prep_sg

[Varadarajan Narayanan]

Take specific sgl and nent to be prepared.  This is in
preparation for splitting DMA into multiple transacations, this
contains no code changes just refactoring.

Signed-off-by: Matthew McClintock <mmcclint-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
Signed-off-by: Varadarajan Narayanan <varada-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
---
 drivers/spi/spi-qup.c | 23 ++++++++++-------------
 1 file changed, 10 insertions(+), 13 deletions(-)

diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
index 67e7463..3ac9b25 100644
--- a/drivers/spi/spi-qup.c
+++ b/drivers/spi/spi-qup.c
@@ -382,27 +382,20 @@ static void spi_qup_write(struct spi_qup *controller)
 	} while (remainder);
 }
 
-static int spi_qup_prep_sg(struct spi_master *master, struct spi_transfer *xfer,
-			   enum dma_transfer_direction dir,
+static int spi_qup_prep_sg(struct spi_master *master, struct scatterlist *sgl,
+			   unsigned int nents, enum dma_transfer_direction dir,
 			   dma_async_tx_callback callback)
 {
 	struct spi_qup *qup = spi_master_get_devdata(master);
 	unsigned long flags = DMA_PREP_INTERRUPT | DMA_PREP_FENCE;
 	struct dma_async_tx_descriptor *desc;
-	struct scatterlist *sgl;
 	struct dma_chan *chan;
 	dma_cookie_t cookie;
-	unsigned int nents;
 
-	if (dir == DMA_MEM_TO_DEV) {
+	if (dir == DMA_MEM_TO_DEV)
 		chan = master->dma_tx;
-		nents = xfer->tx_sg.nents;
-		sgl = xfer->tx_sg.sgl;
-	} else {
+	else
 		chan = master->dma_rx;
-		nents = xfer->rx_sg.nents;
-		sgl = xfer->rx_sg.sgl;
-	}
 
 	desc = dmaengine_prep_slave_sg(chan, sgl, nents, dir, flags);
 	if (IS_ERR_OR_NULL(desc))
@@ -451,7 +444,9 @@ static int spi_qup_do_dma(struct spi_device *spi, struct spi_transfer *xfer,
 	}
 
 	if (xfer->rx_buf) {
-		ret = spi_qup_prep_sg(master, xfer, DMA_DEV_TO_MEM, rx_done);
+		ret = spi_qup_prep_sg(master, xfer->rx_sg.sgl,
+				      xfer->rx_sg.nents, DMA_DEV_TO_MEM,
+				      rx_done);
 		if (ret)
 			return ret;
 
@@ -459,7 +454,9 @@ static int spi_qup_do_dma(struct spi_device *spi, struct spi_transfer *xfer,
 	}
 
 	if (xfer->tx_buf) {
-		ret = spi_qup_prep_sg(master, xfer, DMA_MEM_TO_DEV, tx_done);
+		ret = spi_qup_prep_sg(master, xfer->tx_sg.sgl,
+				      xfer->tx_sg.nents, DMA_MEM_TO_DEV,
+				      tx_done);
 		if (ret)
 			return ret;
 
-- 
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation

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[PATCH v5 11/14] spi: qup: refactor spi_qup_prep_sg

[Varadarajan Narayanan]

Take specific sgl and nent to be prepared.  This is in
preparation for splitting DMA into multiple transacations, this
contains no code changes just refactoring.

Signed-off-by: Matthew McClintock <mmcclint@codeaurora.org>
Signed-off-by: Varadarajan Narayanan <varada@codeaurora.org>
---
 drivers/spi/spi-qup.c | 23 ++++++++++-------------
 1 file changed, 10 insertions(+), 13 deletions(-)

diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
index 67e7463..3ac9b25 100644
--- a/drivers/spi/spi-qup.c
+++ b/drivers/spi/spi-qup.c
@@ -382,27 +382,20 @@ static void spi_qup_write(struct spi_qup *controller)
 	} while (remainder);
 }
 
-static int spi_qup_prep_sg(struct spi_master *master, struct spi_transfer *xfer,
-			   enum dma_transfer_direction dir,
+static int spi_qup_prep_sg(struct spi_master *master, struct scatterlist *sgl,
+			   unsigned int nents, enum dma_transfer_direction dir,
 			   dma_async_tx_callback callback)
 {
 	struct spi_qup *qup = spi_master_get_devdata(master);
 	unsigned long flags = DMA_PREP_INTERRUPT | DMA_PREP_FENCE;
 	struct dma_async_tx_descriptor *desc;
-	struct scatterlist *sgl;
 	struct dma_chan *chan;
 	dma_cookie_t cookie;
-	unsigned int nents;
 
-	if (dir == DMA_MEM_TO_DEV) {
+	if (dir == DMA_MEM_TO_DEV)
 		chan = master->dma_tx;
-		nents = xfer->tx_sg.nents;
-		sgl = xfer->tx_sg.sgl;
-	} else {
+	else
 		chan = master->dma_rx;
-		nents = xfer->rx_sg.nents;
-		sgl = xfer->rx_sg.sgl;
-	}
 
 	desc = dmaengine_prep_slave_sg(chan, sgl, nents, dir, flags);
 	if (IS_ERR_OR_NULL(desc))
@@ -451,7 +444,9 @@ static int spi_qup_do_dma(struct spi_device *spi, struct spi_transfer *xfer,
 	}
 
 	if (xfer->rx_buf) {
-		ret = spi_qup_prep_sg(master, xfer, DMA_DEV_TO_MEM, rx_done);
+		ret = spi_qup_prep_sg(master, xfer->rx_sg.sgl,
+				      xfer->rx_sg.nents, DMA_DEV_TO_MEM,
+				      rx_done);
 		if (ret)
 			return ret;
 
@@ -459,7 +454,9 @@ static int spi_qup_do_dma(struct spi_device *spi, struct spi_transfer *xfer,
 	}
 
 	if (xfer->tx_buf) {
-		ret = spi_qup_prep_sg(master, xfer, DMA_MEM_TO_DEV, tx_done);
+		ret = spi_qup_prep_sg(master, xfer->tx_sg.sgl,
+				      xfer->tx_sg.nents, DMA_MEM_TO_DEV,
+				      tx_done);
 		if (ret)
 			return ret;
 
-- 
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation

Applied "spi: qup: refactor spi_qup_prep_sg" to the spi tree

[Mark Brown]

The patch

   spi: qup: refactor spi_qup_prep_sg

has been applied to the spi tree at

   git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From a841b24e627ca2d3b6a23ca00a4908bfe8f3a5ef Mon Sep 17 00:00:00 2001
From: Varadarajan Narayanan <varada@codeaurora.org>
Date: Fri, 28 Jul 2017 12:22:58 +0530
Subject: [PATCH] spi: qup: refactor spi_qup_prep_sg

Take specific sgl and nent to be prepared.  This is in
preparation for splitting DMA into multiple transacations, this
contains no code changes just refactoring.

Signed-off-by: Matthew McClintock <mmcclint@codeaurora.org>
Signed-off-by: Varadarajan Narayanan <varada@codeaurora.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/spi/spi-qup.c | 23 ++++++++++-------------
 1 file changed, 10 insertions(+), 13 deletions(-)

diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
index 707b1ec427fa..1af3b41ac12d 100644
--- a/drivers/spi/spi-qup.c
+++ b/drivers/spi/spi-qup.c
@@ -382,27 +382,20 @@ static void spi_qup_write(struct spi_qup *controller)
 	} while (remainder);
 }
 
-static int spi_qup_prep_sg(struct spi_master *master, struct spi_transfer *xfer,
-			   enum dma_transfer_direction dir,
+static int spi_qup_prep_sg(struct spi_master *master, struct scatterlist *sgl,
+			   unsigned int nents, enum dma_transfer_direction dir,
 			   dma_async_tx_callback callback)
 {
 	struct spi_qup *qup = spi_master_get_devdata(master);
 	unsigned long flags = DMA_PREP_INTERRUPT | DMA_PREP_FENCE;
 	struct dma_async_tx_descriptor *desc;
-	struct scatterlist *sgl;
 	struct dma_chan *chan;
 	dma_cookie_t cookie;
-	unsigned int nents;
 
-	if (dir == DMA_MEM_TO_DEV) {
+	if (dir == DMA_MEM_TO_DEV)
 		chan = master->dma_tx;
-		nents = xfer->tx_sg.nents;
-		sgl = xfer->tx_sg.sgl;
-	} else {
+	else
 		chan = master->dma_rx;
-		nents = xfer->rx_sg.nents;
-		sgl = xfer->rx_sg.sgl;
-	}
 
 	desc = dmaengine_prep_slave_sg(chan, sgl, nents, dir, flags);
 	if (IS_ERR_OR_NULL(desc))
@@ -451,7 +444,9 @@ static int spi_qup_do_dma(struct spi_device *spi, struct spi_transfer *xfer,
 	}
 
 	if (xfer->rx_buf) {
-		ret = spi_qup_prep_sg(master, xfer, DMA_DEV_TO_MEM, rx_done);
+		ret = spi_qup_prep_sg(master, xfer->rx_sg.sgl,
+				      xfer->rx_sg.nents, DMA_DEV_TO_MEM,
+				      rx_done);
 		if (ret)
 			return ret;
 
@@ -459,7 +454,9 @@ static int spi_qup_do_dma(struct spi_device *spi, struct spi_transfer *xfer,
 	}
 
 	if (xfer->tx_buf) {
-		ret = spi_qup_prep_sg(master, xfer, DMA_MEM_TO_DEV, tx_done);
+		ret = spi_qup_prep_sg(master, xfer->tx_sg.sgl,
+				      xfer->tx_sg.nents, DMA_MEM_TO_DEV,
+				      tx_done);
 		if (ret)
 			return ret;
 
-- 
2.13.2

Applied "spi: qup: refactor spi_qup_prep_sg" to the spi tree

[Mark Brown]

The patch

   spi: qup: refactor spi_qup_prep_sg

has been applied to the spi tree at

   git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From a841b24e627ca2d3b6a23ca00a4908bfe8f3a5ef Mon Sep 17 00:00:00 2001
From: Varadarajan Narayanan <varada@codeaurora.org>
Date: Fri, 28 Jul 2017 12:22:58 +0530
Subject: [PATCH] spi: qup: refactor spi_qup_prep_sg

Take specific sgl and nent to be prepared.  This is in
preparation for splitting DMA into multiple transacations, this
contains no code changes just refactoring.

Signed-off-by: Matthew McClintock <mmcclint@codeaurora.org>
Signed-off-by: Varadarajan Narayanan <varada@codeaurora.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/spi/spi-qup.c | 23 ++++++++++-------------
 1 file changed, 10 insertions(+), 13 deletions(-)

diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
index 707b1ec427fa..1af3b41ac12d 100644
--- a/drivers/spi/spi-qup.c
+++ b/drivers/spi/spi-qup.c
@@ -382,27 +382,20 @@ static void spi_qup_write(struct spi_qup *controller)
 	} while (remainder);
 }
 
-static int spi_qup_prep_sg(struct spi_master *master, struct spi_transfer *xfer,
-			   enum dma_transfer_direction dir,
+static int spi_qup_prep_sg(struct spi_master *master, struct scatterlist *sgl,
+			   unsigned int nents, enum dma_transfer_direction dir,
 			   dma_async_tx_callback callback)
 {
 	struct spi_qup *qup = spi_master_get_devdata(master);
 	unsigned long flags = DMA_PREP_INTERRUPT | DMA_PREP_FENCE;
 	struct dma_async_tx_descriptor *desc;
-	struct scatterlist *sgl;
 	struct dma_chan *chan;
 	dma_cookie_t cookie;
-	unsigned int nents;
 
-	if (dir == DMA_MEM_TO_DEV) {
+	if (dir == DMA_MEM_TO_DEV)
 		chan = master->dma_tx;
-		nents = xfer->tx_sg.nents;
-		sgl = xfer->tx_sg.sgl;
-	} else {
+	else
 		chan = master->dma_rx;
-		nents = xfer->rx_sg.nents;
-		sgl = xfer->rx_sg.sgl;
-	}
 
 	desc = dmaengine_prep_slave_sg(chan, sgl, nents, dir, flags);
 	if (IS_ERR_OR_NULL(desc))
@@ -451,7 +444,9 @@ static int spi_qup_do_dma(struct spi_device *spi, struct spi_transfer *xfer,
 	}
 
 	if (xfer->rx_buf) {
-		ret = spi_qup_prep_sg(master, xfer, DMA_DEV_TO_MEM, rx_done);
+		ret = spi_qup_prep_sg(master, xfer->rx_sg.sgl,
+				      xfer->rx_sg.nents, DMA_DEV_TO_MEM,
+				      rx_done);
 		if (ret)
 			return ret;
 
@@ -459,7 +454,9 @@ static int spi_qup_do_dma(struct spi_device *spi, struct spi_transfer *xfer,
 	}
 
 	if (xfer->tx_buf) {
-		ret = spi_qup_prep_sg(master, xfer, DMA_MEM_TO_DEV, tx_done);
+		ret = spi_qup_prep_sg(master, xfer->tx_sg.sgl,
+				      xfer->tx_sg.nents, DMA_MEM_TO_DEV,
+				      tx_done);
 		if (ret)
 			return ret;
 
-- 
2.13.2

[PATCH v5 12/14] spi: qup: allow multiple DMA transactions per spi xfer

[Varadarajan Narayanan]

Much like the block mode changes, we are breaking up DMA transactions
into 64K chunks so we can reset the QUP engine.

Signed-off-by: Matthew McClintock <mmcclint-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
Signed-off-by: Varadarajan Narayanan <varada-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
---
 drivers/spi/spi-qup.c | 93 +++++++++++++++++++++++++++++++++++----------------
 1 file changed, 65 insertions(+), 28 deletions(-)

diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
index 3ac9b25..3c2c2c0 100644
--- a/drivers/spi/spi-qup.c
+++ b/drivers/spi/spi-qup.c
@@ -418,12 +418,35 @@ static void spi_qup_dma_terminate(struct spi_master *master,
 		dmaengine_terminate_all(master->dma_rx);
 }
 
+static u32 spi_qup_sgl_get_nents_len(struct scatterlist *sgl, u32 max,
+				     u32 *nents)
+{
+	struct scatterlist *sg;
+	u32 total = 0;
+
+	*nents = 0;
+
+	for (sg = sgl; sg; sg = sg_next(sg)) {
+		unsigned int len = sg_dma_len(sg);
+
+		/* check for overflow as well as limit */
+		if (((total + len) < total) || ((total + len) > max))
+			break;
+
+		total += len;
+		(*nents)++;
+	}
+
+	return total;
+}
+
 static int spi_qup_do_dma(struct spi_device *spi, struct spi_transfer *xfer,
 			  unsigned long timeout)
 {
 	dma_async_tx_callback rx_done = NULL, tx_done = NULL;
 	struct spi_master *master = spi->master;
 	struct spi_qup *qup = spi_master_get_devdata(master);
+	struct scatterlist *tx_sgl, *rx_sgl;
 	int ret;
 
 	if (xfer->rx_buf)
@@ -431,43 +454,57 @@ static int spi_qup_do_dma(struct spi_device *spi, struct spi_transfer *xfer,
 	else if (xfer->tx_buf)
 		tx_done = spi_qup_dma_done;
 
-	ret = spi_qup_io_config(spi, xfer);
-	if (ret)
-		return ret;
+	rx_sgl = xfer->rx_sg.sgl;
+	tx_sgl = xfer->tx_sg.sgl;
 
-	/* before issuing the descriptors, set the QUP to run */
-	ret = spi_qup_set_state(qup, QUP_STATE_RUN);
-	if (ret) {
-		dev_warn(qup->dev, "%s(%d): cannot set RUN state\n",
-				__func__, __LINE__);
-		return ret;
-	}
+	do {
+		u32 rx_nents, tx_nents;
+
+		if (rx_sgl)
+			qup->n_words = spi_qup_sgl_get_nents_len(rx_sgl,
+					SPI_MAX_XFER, &rx_nents) / qup->w_size;
+		if (tx_sgl)
+			qup->n_words = spi_qup_sgl_get_nents_len(tx_sgl,
+					SPI_MAX_XFER, &tx_nents) / qup->w_size;
+		if (!qup->n_words)
+			return -EIO;
 
-	if (xfer->rx_buf) {
-		ret = spi_qup_prep_sg(master, xfer->rx_sg.sgl,
-				      xfer->rx_sg.nents, DMA_DEV_TO_MEM,
-				      rx_done);
+		ret = spi_qup_io_config(spi, xfer);
 		if (ret)
 			return ret;
 
-		dma_async_issue_pending(master->dma_rx);
-	}
-
-	if (xfer->tx_buf) {
-		ret = spi_qup_prep_sg(master, xfer->tx_sg.sgl,
-				      xfer->tx_sg.nents, DMA_MEM_TO_DEV,
-				      tx_done);
-		if (ret)
+		/* before issuing the descriptors, set the QUP to run */
+		ret = spi_qup_set_state(qup, QUP_STATE_RUN);
+		if (ret) {
+			dev_warn(qup->dev, "cannot set RUN state\n");
 			return ret;
+		}
+		if (rx_sgl) {
+			ret = spi_qup_prep_sg(master, rx_sgl, rx_nents,
+					      DMA_DEV_TO_MEM, rx_done);
+			if (ret)
+				return ret;
+			dma_async_issue_pending(master->dma_rx);
+		}
 
-		dma_async_issue_pending(master->dma_tx);
-	}
+		if (tx_sgl) {
+			ret = spi_qup_prep_sg(master, tx_sgl, tx_nents,
+					      DMA_MEM_TO_DEV, tx_done);
+			if (ret)
+				return ret;
+
+			dma_async_issue_pending(master->dma_tx);
+		}
+
+		if (!wait_for_completion_timeout(&qup->done, timeout))
+			return -ETIMEDOUT;
 
-	if (rx_done && !wait_for_completion_timeout(&qup->done, timeout))
-		return -ETIMEDOUT;
+		for (; rx_sgl && rx_nents--; rx_sgl = sg_next(rx_sgl))
+			;
+		for (; tx_sgl && tx_nents--; tx_sgl = sg_next(tx_sgl))
+			;
 
-	if (tx_done && !wait_for_completion_timeout(&qup->done, timeout))
-		return -ETIMEDOUT;
+	} while (rx_sgl || tx_sgl);
 
 	return 0;
 }
-- 
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation

--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
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[PATCH v5 12/14] spi: qup: allow multiple DMA transactions per spi xfer

[Varadarajan Narayanan]

Much like the block mode changes, we are breaking up DMA transactions
into 64K chunks so we can reset the QUP engine.

Signed-off-by: Matthew McClintock <mmcclint@codeaurora.org>
Signed-off-by: Varadarajan Narayanan <varada@codeaurora.org>
---
 drivers/spi/spi-qup.c | 93 +++++++++++++++++++++++++++++++++++----------------
 1 file changed, 65 insertions(+), 28 deletions(-)

diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
index 3ac9b25..3c2c2c0 100644
--- a/drivers/spi/spi-qup.c
+++ b/drivers/spi/spi-qup.c
@@ -418,12 +418,35 @@ static void spi_qup_dma_terminate(struct spi_master *master,
 		dmaengine_terminate_all(master->dma_rx);
 }
 
+static u32 spi_qup_sgl_get_nents_len(struct scatterlist *sgl, u32 max,
+				     u32 *nents)
+{
+	struct scatterlist *sg;
+	u32 total = 0;
+
+	*nents = 0;
+
+	for (sg = sgl; sg; sg = sg_next(sg)) {
+		unsigned int len = sg_dma_len(sg);
+
+		/* check for overflow as well as limit */
+		if (((total + len) < total) || ((total + len) > max))
+			break;
+
+		total += len;
+		(*nents)++;
+	}
+
+	return total;
+}
+
 static int spi_qup_do_dma(struct spi_device *spi, struct spi_transfer *xfer,
 			  unsigned long timeout)
 {
 	dma_async_tx_callback rx_done = NULL, tx_done = NULL;
 	struct spi_master *master = spi->master;
 	struct spi_qup *qup = spi_master_get_devdata(master);
+	struct scatterlist *tx_sgl, *rx_sgl;
 	int ret;
 
 	if (xfer->rx_buf)
@@ -431,43 +454,57 @@ static int spi_qup_do_dma(struct spi_device *spi, struct spi_transfer *xfer,
 	else if (xfer->tx_buf)
 		tx_done = spi_qup_dma_done;
 
-	ret = spi_qup_io_config(spi, xfer);
-	if (ret)
-		return ret;
+	rx_sgl = xfer->rx_sg.sgl;
+	tx_sgl = xfer->tx_sg.sgl;
 
-	/* before issuing the descriptors, set the QUP to run */
-	ret = spi_qup_set_state(qup, QUP_STATE_RUN);
-	if (ret) {
-		dev_warn(qup->dev, "%s(%d): cannot set RUN state\n",
-				__func__, __LINE__);
-		return ret;
-	}
+	do {
+		u32 rx_nents, tx_nents;
+
+		if (rx_sgl)
+			qup->n_words = spi_qup_sgl_get_nents_len(rx_sgl,
+					SPI_MAX_XFER, &rx_nents) / qup->w_size;
+		if (tx_sgl)
+			qup->n_words = spi_qup_sgl_get_nents_len(tx_sgl,
+					SPI_MAX_XFER, &tx_nents) / qup->w_size;
+		if (!qup->n_words)
+			return -EIO;
 
-	if (xfer->rx_buf) {
-		ret = spi_qup_prep_sg(master, xfer->rx_sg.sgl,
-				      xfer->rx_sg.nents, DMA_DEV_TO_MEM,
-				      rx_done);
+		ret = spi_qup_io_config(spi, xfer);
 		if (ret)
 			return ret;
 
-		dma_async_issue_pending(master->dma_rx);
-	}
-
-	if (xfer->tx_buf) {
-		ret = spi_qup_prep_sg(master, xfer->tx_sg.sgl,
-				      xfer->tx_sg.nents, DMA_MEM_TO_DEV,
-				      tx_done);
-		if (ret)
+		/* before issuing the descriptors, set the QUP to run */
+		ret = spi_qup_set_state(qup, QUP_STATE_RUN);
+		if (ret) {
+			dev_warn(qup->dev, "cannot set RUN state\n");
 			return ret;
+		}
+		if (rx_sgl) {
+			ret = spi_qup_prep_sg(master, rx_sgl, rx_nents,
+					      DMA_DEV_TO_MEM, rx_done);
+			if (ret)
+				return ret;
+			dma_async_issue_pending(master->dma_rx);
+		}
 
-		dma_async_issue_pending(master->dma_tx);
-	}
+		if (tx_sgl) {
+			ret = spi_qup_prep_sg(master, tx_sgl, tx_nents,
+					      DMA_MEM_TO_DEV, tx_done);
+			if (ret)
+				return ret;
+
+			dma_async_issue_pending(master->dma_tx);
+		}
+
+		if (!wait_for_completion_timeout(&qup->done, timeout))
+			return -ETIMEDOUT;
 
-	if (rx_done && !wait_for_completion_timeout(&qup->done, timeout))
-		return -ETIMEDOUT;
+		for (; rx_sgl && rx_nents--; rx_sgl = sg_next(rx_sgl))
+			;
+		for (; tx_sgl && tx_nents--; tx_sgl = sg_next(tx_sgl))
+			;
 
-	if (tx_done && !wait_for_completion_timeout(&qup->done, timeout))
-		return -ETIMEDOUT;
+	} while (rx_sgl || tx_sgl);
 
 	return 0;
 }
-- 
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation

[PATCH v5 04/14] spi: qup: Place the QUP in run mode before DMA

[Varadarajan Narayanan]

Signed-off-by: Andy Gross <andy.gross@linaro.org>
Signed-off-by: Varadarajan Narayanan <varada@codeaurora.org>
---
 drivers/spi/spi-qup.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
index 92922b6..e6294f8 100644
--- a/drivers/spi/spi-qup.c
+++ b/drivers/spi/spi-qup.c
@@ -342,6 +342,14 @@ static int spi_qup_do_dma(struct spi_master *master, struct spi_transfer *xfer,
 	else if (xfer->tx_buf)
 		tx_done = spi_qup_dma_done;
 
+	/* before issuing the descriptors, set the QUP to run */
+	ret = spi_qup_set_state(qup, QUP_STATE_RUN);
+	if (ret) {
+		dev_warn(qup->dev, "%s(%d): cannot set RUN state\n",
+				__func__, __LINE__);
+		return ret;
+	}
+
 	if (xfer->rx_buf) {
 		ret = spi_qup_prep_sg(master, xfer, DMA_DEV_TO_MEM, rx_done);
 		if (ret)
@@ -387,6 +395,13 @@ static int spi_qup_do_pio(struct spi_master *master, struct spi_transfer *xfer,
 
 	spi_qup_fifo_write(qup, xfer);
 
+	ret = spi_qup_set_state(qup, QUP_STATE_RUN);
+	if (ret) {
+		dev_warn(qup->dev, "%s(%d): cannot set RUN state\n",
+				__func__, __LINE__);
+		return ret;
+	}
+
 	if (!wait_for_completion_timeout(&qup->done, timeout))
 		return -ETIMEDOUT;
 
-- 
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation

Applied "spi: qup: Place the QUP in run mode before DMA" to the spi tree

[Mark Brown]

The patch

   spi: qup: Place the QUP in run mode before DMA

has been applied to the spi tree at

   git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From ce00bab3187f9fc1afac07914959bff0c52547c2 Mon Sep 17 00:00:00 2001
From: Varadarajan Narayanan <varada@codeaurora.org>
Date: Fri, 28 Jul 2017 12:22:51 +0530
Subject: [PATCH] spi: qup: Place the QUP in run mode before DMA

Signed-off-by: Andy Gross <andy.gross@linaro.org>
Signed-off-by: Varadarajan Narayanan <varada@codeaurora.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/spi/spi-qup.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
index fdd34c3ce426..f1aa5c15d180 100644
--- a/drivers/spi/spi-qup.c
+++ b/drivers/spi/spi-qup.c
@@ -343,6 +343,14 @@ static int spi_qup_do_dma(struct spi_master *master, struct spi_transfer *xfer,
 	else if (xfer->tx_buf)
 		tx_done = spi_qup_dma_done;
 
+	/* before issuing the descriptors, set the QUP to run */
+	ret = spi_qup_set_state(qup, QUP_STATE_RUN);
+	if (ret) {
+		dev_warn(qup->dev, "%s(%d): cannot set RUN state\n",
+				__func__, __LINE__);
+		return ret;
+	}
+
 	if (xfer->rx_buf) {
 		ret = spi_qup_prep_sg(master, xfer, DMA_DEV_TO_MEM, rx_done);
 		if (ret)
@@ -385,6 +393,13 @@ static int spi_qup_do_pio(struct spi_master *master, struct spi_transfer *xfer,
 
 	spi_qup_fifo_write(qup, xfer);
 
+	ret = spi_qup_set_state(qup, QUP_STATE_RUN);
+	if (ret) {
+		dev_warn(qup->dev, "%s(%d): cannot set RUN state\n",
+				__func__, __LINE__);
+		return ret;
+	}
+
 	if (!wait_for_completion_timeout(&qup->done, timeout))
 		return -ETIMEDOUT;
 
-- 
2.13.2

Applied "spi: qup: Place the QUP in run mode before DMA" to the spi tree

[Mark Brown]

The patch

   spi: qup: Place the QUP in run mode before DMA

has been applied to the spi tree at

   git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From ce00bab3187f9fc1afac07914959bff0c52547c2 Mon Sep 17 00:00:00 2001
From: Varadarajan Narayanan <varada@codeaurora.org>
Date: Fri, 28 Jul 2017 12:22:51 +0530
Subject: [PATCH] spi: qup: Place the QUP in run mode before DMA

Signed-off-by: Andy Gross <andy.gross@linaro.org>
Signed-off-by: Varadarajan Narayanan <varada@codeaurora.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/spi/spi-qup.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
index fdd34c3ce426..f1aa5c15d180 100644
--- a/drivers/spi/spi-qup.c
+++ b/drivers/spi/spi-qup.c
@@ -343,6 +343,14 @@ static int spi_qup_do_dma(struct spi_master *master, struct spi_transfer *xfer,
 	else if (xfer->tx_buf)
 		tx_done = spi_qup_dma_done;
 
+	/* before issuing the descriptors, set the QUP to run */
+	ret = spi_qup_set_state(qup, QUP_STATE_RUN);
+	if (ret) {
+		dev_warn(qup->dev, "%s(%d): cannot set RUN state\n",
+				__func__, __LINE__);
+		return ret;
+	}
+
 	if (xfer->rx_buf) {
 		ret = spi_qup_prep_sg(master, xfer, DMA_DEV_TO_MEM, rx_done);
 		if (ret)
@@ -385,6 +393,13 @@ static int spi_qup_do_pio(struct spi_master *master, struct spi_transfer *xfer,
 
 	spi_qup_fifo_write(qup, xfer);
 
+	ret = spi_qup_set_state(qup, QUP_STATE_RUN);
+	if (ret) {
+		dev_warn(qup->dev, "%s(%d): cannot set RUN state\n",
+				__func__, __LINE__);
+		return ret;
+	}
+
 	if (!wait_for_completion_timeout(&qup->done, timeout))
 		return -ETIMEDOUT;
 
-- 
2.13.2

[PATCH v5 06/14] spi: qup: Fix transaction done signaling

[Varadarajan Narayanan]

Wait to signal done until we get all of the interrupts we are expecting
to get for a transaction.  If we don't wait for the input done flag, we
can be in between transactions when the done flag comes in and this can
mess up the next transaction.

While here cleaning up the code which sets controller->xfer = NULL and
restores it in the ISR. This looks to be some debug code which is not
required.

Signed-off-by: Andy Gross <andy.gross@linaro.org>
Signed-off-by: Varadarajan Narayanan <varada@codeaurora.org>
---
 drivers/spi/spi-qup.c | 27 +++++----------------------
 1 file changed, 5 insertions(+), 22 deletions(-)

diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
index aa1b7b8..5e6f7e5 100644
--- a/drivers/spi/spi-qup.c
+++ b/drivers/spi/spi-qup.c
@@ -411,29 +411,16 @@ static int spi_qup_do_pio(struct spi_master *master, struct spi_transfer *xfer,
 static irqreturn_t spi_qup_qup_irq(int irq, void *dev_id)
 {
 	struct spi_qup *controller = dev_id;
-	struct spi_transfer *xfer;
+	struct spi_transfer *xfer = controller->xfer;
 	u32 opflags, qup_err, spi_err;
-	unsigned long flags;
 	int error = 0;
 
-	spin_lock_irqsave(&controller->lock, flags);
-	xfer = controller->xfer;
-	controller->xfer = NULL;
-	spin_unlock_irqrestore(&controller->lock, flags);
-
 	qup_err = readl_relaxed(controller->base + QUP_ERROR_FLAGS);
 	spi_err = readl_relaxed(controller->base + SPI_ERROR_FLAGS);
 	opflags = readl_relaxed(controller->base + QUP_OPERATIONAL);
 
 	writel_relaxed(qup_err, controller->base + QUP_ERROR_FLAGS);
 	writel_relaxed(spi_err, controller->base + SPI_ERROR_FLAGS);
-	writel_relaxed(opflags, controller->base + QUP_OPERATIONAL);
-
-	if (!xfer) {
-		dev_err_ratelimited(controller->dev, "unexpected irq %08x %08x %08x\n",
-				    qup_err, spi_err, opflags);
-		return IRQ_HANDLED;
-	}
 
 	if (qup_err) {
 		if (qup_err & QUP_ERROR_OUTPUT_OVER_RUN)
@@ -457,7 +444,9 @@ static irqreturn_t spi_qup_qup_irq(int irq, void *dev_id)
 		error = -EIO;
 	}
 
-	if (!spi_qup_is_dma_xfer(controller->mode)) {
+	if (spi_qup_is_dma_xfer(controller->mode)) {
+		writel_relaxed(opflags, controller->base + QUP_OPERATIONAL);
+	} else {
 		if (opflags & QUP_OP_IN_SERVICE_FLAG)
 			spi_qup_fifo_read(controller, xfer);
 
@@ -465,12 +454,7 @@ static irqreturn_t spi_qup_qup_irq(int irq, void *dev_id)
 			spi_qup_fifo_write(controller, xfer);
 	}
 
-	spin_lock_irqsave(&controller->lock, flags);
-	controller->error = error;
-	controller->xfer = xfer;
-	spin_unlock_irqrestore(&controller->lock, flags);
-
-	if (controller->rx_bytes == xfer->len || error)
+	if ((opflags & QUP_OP_MAX_INPUT_DONE_FLAG) || error)
 		complete(&controller->done);
 
 	return IRQ_HANDLED;
@@ -668,7 +652,6 @@ static int spi_qup_transfer_one(struct spi_master *master,
 exit:
 	spi_qup_set_state(controller, QUP_STATE_RESET);
 	spin_lock_irqsave(&controller->lock, flags);
-	controller->xfer = NULL;
 	if (!ret)
 		ret = controller->error;
 	spin_unlock_irqrestore(&controller->lock, flags);
-- 
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation

[PATCH v5 08/14] spi: qup: refactor spi_qup_io_config into two functions

[Varadarajan Narayanan]

This is in preparation for handling transactions larger than
64K-1 bytes in block mode, which is currently unsupported and
quietly fails.

We need to break these into two functions 1) prep is
called once per spi_message and 2) io_config is called
once per spi-qup bus transaction

This is just refactoring, there should be no functional
change

Signed-off-by: Matthew McClintock <mmcclint@codeaurora.org>
Signed-off-by: Varadarajan Narayanan <varada@codeaurora.org>
---
 drivers/spi/spi-qup.c | 91 +++++++++++++++++++++++++++++++++++----------------
 1 file changed, 62 insertions(+), 29 deletions(-)

diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
index d819f87..82593f6 100644
--- a/drivers/spi/spi-qup.c
+++ b/drivers/spi/spi-qup.c
@@ -547,12 +547,11 @@ static irqreturn_t spi_qup_qup_irq(int irq, void *dev_id)
 	return IRQ_HANDLED;
 }
 
-/* set clock freq ... bits per word */
-static int spi_qup_io_config(struct spi_device *spi, struct spi_transfer *xfer)
+/* set clock freq ... bits per word, determine mode */
+static int spi_qup_io_prep(struct spi_device *spi, struct spi_transfer *xfer)
 {
 	struct spi_qup *controller = spi_master_get_devdata(spi->master);
-	u32 config, iomode, control;
-	int ret, n_words;
+	int ret;
 
 	if (spi->mode & SPI_LOOP && xfer->len > controller->in_fifo_sz) {
 		dev_err(controller->dev, "too big size for loopback %d > %d\n",
@@ -567,32 +566,56 @@ static int spi_qup_io_config(struct spi_device *spi, struct spi_transfer *xfer)
 		return -EIO;
 	}
 
-	if (spi_qup_set_state(controller, QUP_STATE_RESET)) {
-		dev_err(controller->dev, "cannot set RESET state\n");
-		return -EIO;
-	}
-
 	controller->w_size = DIV_ROUND_UP(xfer->bits_per_word, 8);
 	controller->n_words = xfer->len / controller->w_size;
-	n_words = controller->n_words;
-
-	if (n_words <= (controller->in_fifo_sz / sizeof(u32))) {
 
+	if (controller->n_words <= (controller->in_fifo_sz / sizeof(u32)))
 		controller->mode = QUP_IO_M_MODE_FIFO;
+	else if (spi->master->can_dma &&
+		 spi->master->can_dma(spi->master, spi, xfer) &&
+		 spi->master->cur_msg_mapped)
+		controller->mode = QUP_IO_M_MODE_BAM;
+	else
+		controller->mode = QUP_IO_M_MODE_BLOCK;
+
+	return 0;
+}
+
+/* prep qup for another spi transaction of specific type */
+static int spi_qup_io_config(struct spi_device *spi, struct spi_transfer *xfer)
+{
+	struct spi_qup *controller = spi_master_get_devdata(spi->master);
+	u32 config, iomode, control;
+	unsigned long flags;
+
+	spin_lock_irqsave(&controller->lock, flags);
+	controller->xfer     = xfer;
+	controller->error    = 0;
+	controller->rx_bytes = 0;
+	controller->tx_bytes = 0;
+	spin_unlock_irqrestore(&controller->lock, flags);
+
+
+	if (spi_qup_set_state(controller, QUP_STATE_RESET)) {
+		dev_err(controller->dev, "cannot set RESET state\n");
+		return -EIO;
+	}
 
-		writel_relaxed(n_words, controller->base + QUP_MX_READ_CNT);
-		writel_relaxed(n_words, controller->base + QUP_MX_WRITE_CNT);
+	switch (controller->mode) {
+	case QUP_IO_M_MODE_FIFO:
+		writel_relaxed(controller->n_words,
+			       controller->base + QUP_MX_READ_CNT);
+		writel_relaxed(controller->n_words,
+			       controller->base + QUP_MX_WRITE_CNT);
 		/* must be zero for FIFO */
 		writel_relaxed(0, controller->base + QUP_MX_INPUT_CNT);
 		writel_relaxed(0, controller->base + QUP_MX_OUTPUT_CNT);
-	} else if (spi->master->can_dma &&
-		   spi->master->can_dma(spi->master, spi, xfer) &&
-		   spi->master->cur_msg_mapped) {
-
-		controller->mode = QUP_IO_M_MODE_BAM;
-
-		writel_relaxed(n_words, controller->base + QUP_MX_INPUT_CNT);
-		writel_relaxed(n_words, controller->base + QUP_MX_OUTPUT_CNT);
+		break;
+	case QUP_IO_M_MODE_BAM:
+		writel_relaxed(controller->n_words,
+			       controller->base + QUP_MX_INPUT_CNT);
+		writel_relaxed(controller->n_words,
+			       controller->base + QUP_MX_OUTPUT_CNT);
 		/* must be zero for BLOCK and BAM */
 		writel_relaxed(0, controller->base + QUP_MX_READ_CNT);
 		writel_relaxed(0, controller->base + QUP_MX_WRITE_CNT);
@@ -610,19 +633,25 @@ static int spi_qup_io_config(struct spi_device *spi, struct spi_transfer *xfer)
 			if (xfer->tx_buf)
 				writel_relaxed(0, input_cnt);
 			else
-				writel_relaxed(n_words, input_cnt);
+				writel_relaxed(controller->n_words, input_cnt);
 
 			writel_relaxed(0, controller->base + QUP_MX_OUTPUT_CNT);
 		}
-	} else {
-
-		controller->mode = QUP_IO_M_MODE_BLOCK;
-
-		writel_relaxed(n_words, controller->base + QUP_MX_INPUT_CNT);
-		writel_relaxed(n_words, controller->base + QUP_MX_OUTPUT_CNT);
+		break;
+	case QUP_IO_M_MODE_BLOCK:
+		reinit_completion(&controller->done);
+		writel_relaxed(controller->n_words,
+			       controller->base + QUP_MX_INPUT_CNT);
+		writel_relaxed(controller->n_words,
+			       controller->base + QUP_MX_OUTPUT_CNT);
 		/* must be zero for BLOCK and BAM */
 		writel_relaxed(0, controller->base + QUP_MX_READ_CNT);
 		writel_relaxed(0, controller->base + QUP_MX_WRITE_CNT);
+		break;
+	default:
+		dev_err(controller->dev, "unknown mode = %d\n",
+				controller->mode);
+		return -EIO;
 	}
 
 	iomode = readl_relaxed(controller->base + QUP_IO_M_MODES);
@@ -711,6 +740,10 @@ static int spi_qup_transfer_one(struct spi_master *master,
 	unsigned long timeout, flags;
 	int ret = -EIO;
 
+	ret = spi_qup_io_prep(spi, xfer);
+	if (ret)
+		return ret;
+
 	ret = spi_qup_io_config(spi, xfer);
 	if (ret)
 		return ret;
-- 
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation

Applied "spi: qup: refactor spi_qup_io_config into two functions" to the spi tree

[Mark Brown]

The patch

   spi: qup: refactor spi_qup_io_config into two functions

has been applied to the spi tree at

   git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 94b9149febddcd367de75d2706a32183e2abbaa7 Mon Sep 17 00:00:00 2001
From: Varadarajan Narayanan <varada@codeaurora.org>
Date: Fri, 28 Jul 2017 12:22:55 +0530
Subject: [PATCH] spi: qup: refactor spi_qup_io_config into two functions

This is in preparation for handling transactions larger than
64K-1 bytes in block mode, which is currently unsupported and
quietly fails.

We need to break these into two functions 1) prep is
called once per spi_message and 2) io_config is called
once per spi-qup bus transaction

This is just refactoring, there should be no functional
change

Signed-off-by: Matthew McClintock <mmcclint@codeaurora.org>
Signed-off-by: Varadarajan Narayanan <varada@codeaurora.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/spi/spi-qup.c | 91 +++++++++++++++++++++++++++++++++++----------------
 1 file changed, 62 insertions(+), 29 deletions(-)

diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
index 8cfa112bb142..ff5aa08b5725 100644
--- a/drivers/spi/spi-qup.c
+++ b/drivers/spi/spi-qup.c
@@ -545,12 +545,11 @@ static irqreturn_t spi_qup_qup_irq(int irq, void *dev_id)
 	return IRQ_HANDLED;
 }
 
-/* set clock freq ... bits per word */
-static int spi_qup_io_config(struct spi_device *spi, struct spi_transfer *xfer)
+/* set clock freq ... bits per word, determine mode */
+static int spi_qup_io_prep(struct spi_device *spi, struct spi_transfer *xfer)
 {
 	struct spi_qup *controller = spi_master_get_devdata(spi->master);
-	u32 config, iomode, control;
-	int ret, n_words;
+	int ret;
 
 	if (spi->mode & SPI_LOOP && xfer->len > controller->in_fifo_sz) {
 		dev_err(controller->dev, "too big size for loopback %d > %d\n",
@@ -565,32 +564,56 @@ static int spi_qup_io_config(struct spi_device *spi, struct spi_transfer *xfer)
 		return -EIO;
 	}
 
-	if (spi_qup_set_state(controller, QUP_STATE_RESET)) {
-		dev_err(controller->dev, "cannot set RESET state\n");
-		return -EIO;
-	}
-
 	controller->w_size = DIV_ROUND_UP(xfer->bits_per_word, 8);
 	controller->n_words = xfer->len / controller->w_size;
-	n_words = controller->n_words;
-
-	if (n_words <= (controller->in_fifo_sz / sizeof(u32))) {
 
+	if (controller->n_words <= (controller->in_fifo_sz / sizeof(u32)))
 		controller->mode = QUP_IO_M_MODE_FIFO;
+	else if (spi->master->can_dma &&
+		 spi->master->can_dma(spi->master, spi, xfer) &&
+		 spi->master->cur_msg_mapped)
+		controller->mode = QUP_IO_M_MODE_BAM;
+	else
+		controller->mode = QUP_IO_M_MODE_BLOCK;
+
+	return 0;
+}
+
+/* prep qup for another spi transaction of specific type */
+static int spi_qup_io_config(struct spi_device *spi, struct spi_transfer *xfer)
+{
+	struct spi_qup *controller = spi_master_get_devdata(spi->master);
+	u32 config, iomode, control;
+	unsigned long flags;
+
+	spin_lock_irqsave(&controller->lock, flags);
+	controller->xfer     = xfer;
+	controller->error    = 0;
+	controller->rx_bytes = 0;
+	controller->tx_bytes = 0;
+	spin_unlock_irqrestore(&controller->lock, flags);
+
+
+	if (spi_qup_set_state(controller, QUP_STATE_RESET)) {
+		dev_err(controller->dev, "cannot set RESET state\n");
+		return -EIO;
+	}
 
-		writel_relaxed(n_words, controller->base + QUP_MX_READ_CNT);
-		writel_relaxed(n_words, controller->base + QUP_MX_WRITE_CNT);
+	switch (controller->mode) {
+	case QUP_IO_M_MODE_FIFO:
+		writel_relaxed(controller->n_words,
+			       controller->base + QUP_MX_READ_CNT);
+		writel_relaxed(controller->n_words,
+			       controller->base + QUP_MX_WRITE_CNT);
 		/* must be zero for FIFO */
 		writel_relaxed(0, controller->base + QUP_MX_INPUT_CNT);
 		writel_relaxed(0, controller->base + QUP_MX_OUTPUT_CNT);
-	} else if (spi->master->can_dma &&
-		   spi->master->can_dma(spi->master, spi, xfer) &&
-		   spi->master->cur_msg_mapped) {
-
-		controller->mode = QUP_IO_M_MODE_BAM;
-
-		writel_relaxed(n_words, controller->base + QUP_MX_INPUT_CNT);
-		writel_relaxed(n_words, controller->base + QUP_MX_OUTPUT_CNT);
+		break;
+	case QUP_IO_M_MODE_BAM:
+		writel_relaxed(controller->n_words,
+			       controller->base + QUP_MX_INPUT_CNT);
+		writel_relaxed(controller->n_words,
+			       controller->base + QUP_MX_OUTPUT_CNT);
 		/* must be zero for BLOCK and BAM */
 		writel_relaxed(0, controller->base + QUP_MX_READ_CNT);
 		writel_relaxed(0, controller->base + QUP_MX_WRITE_CNT);
@@ -608,19 +631,25 @@ static int spi_qup_io_config(struct spi_device *spi, struct spi_transfer *xfer)
 			if (xfer->tx_buf)
 				writel_relaxed(0, input_cnt);
 			else
-				writel_relaxed(n_words, input_cnt);
+				writel_relaxed(controller->n_words, input_cnt);
 
 			writel_relaxed(0, controller->base + QUP_MX_OUTPUT_CNT);
 		}
-	} else {
-
-		controller->mode = QUP_IO_M_MODE_BLOCK;
-
-		writel_relaxed(n_words, controller->base + QUP_MX_INPUT_CNT);
-		writel_relaxed(n_words, controller->base + QUP_MX_OUTPUT_CNT);
+		break;
+	case QUP_IO_M_MODE_BLOCK:
+		reinit_completion(&controller->done);
+		writel_relaxed(controller->n_words,
+			       controller->base + QUP_MX_INPUT_CNT);
+		writel_relaxed(controller->n_words,
+			       controller->base + QUP_MX_OUTPUT_CNT);
 		/* must be zero for BLOCK and BAM */
 		writel_relaxed(0, controller->base + QUP_MX_READ_CNT);
 		writel_relaxed(0, controller->base + QUP_MX_WRITE_CNT);
+		break;
+	default:
+		dev_err(controller->dev, "unknown mode = %d\n",
+				controller->mode);
+		return -EIO;
 	}
 
 	iomode = readl_relaxed(controller->base + QUP_IO_M_MODES);
@@ -709,6 +738,10 @@ static int spi_qup_transfer_one(struct spi_master *master,
 	unsigned long timeout, flags;
 	int ret = -EIO;
 
+	ret = spi_qup_io_prep(spi, xfer);
+	if (ret)
+		return ret;
+
 	ret = spi_qup_io_config(spi, xfer);
 	if (ret)
 		return ret;
-- 
2.13.2

Applied "spi: qup: refactor spi_qup_io_config into two functions" to the spi tree

[Mark Brown]

The patch

   spi: qup: refactor spi_qup_io_config into two functions

has been applied to the spi tree at

   git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 94b9149febddcd367de75d2706a32183e2abbaa7 Mon Sep 17 00:00:00 2001
From: Varadarajan Narayanan <varada@codeaurora.org>
Date: Fri, 28 Jul 2017 12:22:55 +0530
Subject: [PATCH] spi: qup: refactor spi_qup_io_config into two functions

This is in preparation for handling transactions larger than
64K-1 bytes in block mode, which is currently unsupported and
quietly fails.

We need to break these into two functions 1) prep is
called once per spi_message and 2) io_config is called
once per spi-qup bus transaction

This is just refactoring, there should be no functional
change

Signed-off-by: Matthew McClintock <mmcclint@codeaurora.org>
Signed-off-by: Varadarajan Narayanan <varada@codeaurora.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/spi/spi-qup.c | 91 +++++++++++++++++++++++++++++++++++----------------
 1 file changed, 62 insertions(+), 29 deletions(-)

diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
index 8cfa112bb142..ff5aa08b5725 100644
--- a/drivers/spi/spi-qup.c
+++ b/drivers/spi/spi-qup.c
@@ -545,12 +545,11 @@ static irqreturn_t spi_qup_qup_irq(int irq, void *dev_id)
 	return IRQ_HANDLED;
 }
 
-/* set clock freq ... bits per word */
-static int spi_qup_io_config(struct spi_device *spi, struct spi_transfer *xfer)
+/* set clock freq ... bits per word, determine mode */
+static int spi_qup_io_prep(struct spi_device *spi, struct spi_transfer *xfer)
 {
 	struct spi_qup *controller = spi_master_get_devdata(spi->master);
-	u32 config, iomode, control;
-	int ret, n_words;
+	int ret;
 
 	if (spi->mode & SPI_LOOP && xfer->len > controller->in_fifo_sz) {
 		dev_err(controller->dev, "too big size for loopback %d > %d\n",
@@ -565,32 +564,56 @@ static int spi_qup_io_config(struct spi_device *spi, struct spi_transfer *xfer)
 		return -EIO;
 	}
 
-	if (spi_qup_set_state(controller, QUP_STATE_RESET)) {
-		dev_err(controller->dev, "cannot set RESET state\n");
-		return -EIO;
-	}
-
 	controller->w_size = DIV_ROUND_UP(xfer->bits_per_word, 8);
 	controller->n_words = xfer->len / controller->w_size;
-	n_words = controller->n_words;
-
-	if (n_words <= (controller->in_fifo_sz / sizeof(u32))) {
 
+	if (controller->n_words <= (controller->in_fifo_sz / sizeof(u32)))
 		controller->mode = QUP_IO_M_MODE_FIFO;
+	else if (spi->master->can_dma &&
+		 spi->master->can_dma(spi->master, spi, xfer) &&
+		 spi->master->cur_msg_mapped)
+		controller->mode = QUP_IO_M_MODE_BAM;
+	else
+		controller->mode = QUP_IO_M_MODE_BLOCK;
+
+	return 0;
+}
+
+/* prep qup for another spi transaction of specific type */
+static int spi_qup_io_config(struct spi_device *spi, struct spi_transfer *xfer)
+{
+	struct spi_qup *controller = spi_master_get_devdata(spi->master);
+	u32 config, iomode, control;
+	unsigned long flags;
+
+	spin_lock_irqsave(&controller->lock, flags);
+	controller->xfer     = xfer;
+	controller->error    = 0;
+	controller->rx_bytes = 0;
+	controller->tx_bytes = 0;
+	spin_unlock_irqrestore(&controller->lock, flags);
+
+
+	if (spi_qup_set_state(controller, QUP_STATE_RESET)) {
+		dev_err(controller->dev, "cannot set RESET state\n");
+		return -EIO;
+	}
 
-		writel_relaxed(n_words, controller->base + QUP_MX_READ_CNT);
-		writel_relaxed(n_words, controller->base + QUP_MX_WRITE_CNT);
+	switch (controller->mode) {
+	case QUP_IO_M_MODE_FIFO:
+		writel_relaxed(controller->n_words,
+			       controller->base + QUP_MX_READ_CNT);
+		writel_relaxed(controller->n_words,
+			       controller->base + QUP_MX_WRITE_CNT);
 		/* must be zero for FIFO */
 		writel_relaxed(0, controller->base + QUP_MX_INPUT_CNT);
 		writel_relaxed(0, controller->base + QUP_MX_OUTPUT_CNT);
-	} else if (spi->master->can_dma &&
-		   spi->master->can_dma(spi->master, spi, xfer) &&
-		   spi->master->cur_msg_mapped) {
-
-		controller->mode = QUP_IO_M_MODE_BAM;
-
-		writel_relaxed(n_words, controller->base + QUP_MX_INPUT_CNT);
-		writel_relaxed(n_words, controller->base + QUP_MX_OUTPUT_CNT);
+		break;
+	case QUP_IO_M_MODE_BAM:
+		writel_relaxed(controller->n_words,
+			       controller->base + QUP_MX_INPUT_CNT);
+		writel_relaxed(controller->n_words,
+			       controller->base + QUP_MX_OUTPUT_CNT);
 		/* must be zero for BLOCK and BAM */
 		writel_relaxed(0, controller->base + QUP_MX_READ_CNT);
 		writel_relaxed(0, controller->base + QUP_MX_WRITE_CNT);
@@ -608,19 +631,25 @@ static int spi_qup_io_config(struct spi_device *spi, struct spi_transfer *xfer)
 			if (xfer->tx_buf)
 				writel_relaxed(0, input_cnt);
 			else
-				writel_relaxed(n_words, input_cnt);
+				writel_relaxed(controller->n_words, input_cnt);
 
 			writel_relaxed(0, controller->base + QUP_MX_OUTPUT_CNT);
 		}
-	} else {
-
-		controller->mode = QUP_IO_M_MODE_BLOCK;
-
-		writel_relaxed(n_words, controller->base + QUP_MX_INPUT_CNT);
-		writel_relaxed(n_words, controller->base + QUP_MX_OUTPUT_CNT);
+		break;
+	case QUP_IO_M_MODE_BLOCK:
+		reinit_completion(&controller->done);
+		writel_relaxed(controller->n_words,
+			       controller->base + QUP_MX_INPUT_CNT);
+		writel_relaxed(controller->n_words,
+			       controller->base + QUP_MX_OUTPUT_CNT);
 		/* must be zero for BLOCK and BAM */
 		writel_relaxed(0, controller->base + QUP_MX_READ_CNT);
 		writel_relaxed(0, controller->base + QUP_MX_WRITE_CNT);
+		break;
+	default:
+		dev_err(controller->dev, "unknown mode = %d\n",
+				controller->mode);
+		return -EIO;
 	}
 
 	iomode = readl_relaxed(controller->base + QUP_IO_M_MODES);
@@ -709,6 +738,10 @@ static int spi_qup_transfer_one(struct spi_master *master,
 	unsigned long timeout, flags;
 	int ret = -EIO;
 
+	ret = spi_qup_io_prep(spi, xfer);
+	if (ret)
+		return ret;
+
 	ret = spi_qup_io_config(spi, xfer);
 	if (ret)
 		return ret;
-- 
2.13.2

[PATCH v5 13/14] spi: qup: Ensure done detection

[Varadarajan Narayanan]

This patch fixes an issue where a SPI transaction has completed, but the
done condition is missed.  This occurs because at the time of interrupt the
MAX_INPUT_DONE_FLAG is not asserted.  However, in the process of reading
blocks of data from the FIFO, the last portion of data comes in.

The opflags read at the beginning of the irq handler no longer matches the
current opflag state.  To get around this condition, the block read
function should update the opflags so that done detection is correct after
the return.

Signed-off-by: Andy Gross <agross@codeaurora.org>
Signed-off-by: Abhishek Sahu <absahu@codeaurora.org>
Signed-off-by: Varadarajan Narayanan <varada@codeaurora.org>
---
 drivers/spi/spi-qup.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
index 3c2c2c0..4c3c938 100644
--- a/drivers/spi/spi-qup.c
+++ b/drivers/spi/spi-qup.c
@@ -266,7 +266,7 @@ static void spi_qup_read_from_fifo(struct spi_qup *controller, u32 num_words)
 	}
 }
 
-static void spi_qup_read(struct spi_qup *controller)
+static void spi_qup_read(struct spi_qup *controller, u32 *opflags)
 {
 	u32 remainder, words_per_block, num_words;
 	bool is_block_mode = controller->mode == QUP_IO_M_MODE_BLOCK;
@@ -305,10 +305,12 @@ static void spi_qup_read(struct spi_qup *controller)
 
 	/*
 	 * Due to extra stickiness of the QUP_OP_IN_SERVICE_FLAG during block
-	 * mode reads, it has to be cleared again at the very end
+	 * reads, it has to be cleared again at the very end.  However, be sure
+	 * to refresh opflags value because MAX_INPUT_DONE_FLAG may now be
+	 * present and this is used to determine if transaction is complete
 	 */
-	if (is_block_mode && spi_qup_is_flag_set(controller,
-				QUP_OP_MAX_INPUT_DONE_FLAG))
+	*opflags = readl_relaxed(controller->base + QUP_OPERATIONAL);
+	if (is_block_mode && *opflags & QUP_OP_MAX_INPUT_DONE_FLAG)
 		writel_relaxed(QUP_OP_IN_SERVICE_FLAG,
 			       controller->base + QUP_OPERATIONAL);
 
@@ -613,7 +615,7 @@ static irqreturn_t spi_qup_qup_irq(int irq, void *dev_id)
 		writel_relaxed(opflags, controller->base + QUP_OPERATIONAL);
 	} else {
 		if (opflags & QUP_OP_IN_SERVICE_FLAG)
-			spi_qup_read(controller);
+			spi_qup_read(controller, &opflags);
 
 		if (opflags & QUP_OP_OUT_SERVICE_FLAG)
 			spi_qup_write(controller);
-- 
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation

[PATCH v5 14/14] spi: qup: Fix QUP version identify method

[Varadarajan Narayanan]

Use of_device_get_match_data to identify QUP version instead
of of_device_is_compatible.

Signed-off-by: Varadarajan Narayanan <varada@codeaurora.org>
---
 drivers/spi/spi-qup.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
index 4c3c938..1364516 100644
--- a/drivers/spi/spi-qup.c
+++ b/drivers/spi/spi-qup.c
@@ -19,6 +19,7 @@
 #include <linux/list.h>
 #include <linux/module.h>
 #include <linux/of.h>
+#include <linux/of_device.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/spi/spi.h>
@@ -1058,9 +1059,7 @@ static int spi_qup_probe(struct platform_device *pdev)
 	else if (!ret)
 		master->can_dma = spi_qup_can_dma;
 
-	/* set v1 flag if device is version 1 */
-	if (of_device_is_compatible(dev->of_node, "qcom,spi-qup-v1.1.1"))
-		controller->qup_v1 = 1;
+	controller->qup_v1 = (int)of_device_get_match_data(dev);
 
 	if (!controller->qup_v1)
 		master->set_cs = spi_qup_set_cs;
@@ -1256,7 +1255,7 @@ static int spi_qup_remove(struct platform_device *pdev)
 }
 
 static const struct of_device_id spi_qup_dt_match[] = {
-	{ .compatible = "qcom,spi-qup-v1.1.1", },
+	{ .compatible = "qcom,spi-qup-v1.1.1", .data = (void *)1, },
 	{ .compatible = "qcom,spi-qup-v2.1.1", },
 	{ .compatible = "qcom,spi-qup-v2.2.1", },
 	{ }
-- 
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation

Re: [PATCH v5 14/14] spi: qup: Fix QUP version identify method

[kbuild test robot]

[-- Attachment #1: Type: text/plain, Size: 7812 bytes --]

Hi Varadarajan,

[auto build test WARNING on spi/for-next]
[also build test WARNING on v4.13-rc2 next-20170724]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Varadarajan-Narayanan/spi-qup-Fixes-and-add-support-for-64k-transfers/20170725-033101
base:   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git for-next
config: arm64-defconfig (attached as .config)
compiler: aarch64-linux-gnu-gcc (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
        wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=arm64 

All warnings (new ones prefixed by >>):

   drivers//spi/spi-qup.c: In function 'spi_qup_probe':
>> drivers//spi/spi-qup.c:1062:23: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
     controller->qup_v1 = (int)of_device_get_match_data(dev);
                          ^
   drivers//spi/spi-qup.c: In function 'spi_qup_transfer_one':
   drivers//spi/spi-qup.c:507:28: warning: 'tx_nents' may be used uninitialized in this function [-Wmaybe-uninitialized]
      for (; tx_sgl && tx_nents--; tx_sgl = sg_next(tx_sgl))
                       ~~~~~~~~^~
   drivers//spi/spi-qup.c:464:17: note: 'tx_nents' was declared here
      u32 rx_nents, tx_nents;
                    ^~~~~~~~
   drivers//spi/spi-qup.c:505:28: warning: 'rx_nents' may be used uninitialized in this function [-Wmaybe-uninitialized]
      for (; rx_sgl && rx_nents--; rx_sgl = sg_next(rx_sgl))
                       ~~~~~~~~^~
   drivers//spi/spi-qup.c:464:7: note: 'rx_nents' was declared here
      u32 rx_nents, tx_nents;
          ^~~~~~~~

vim +1062 drivers//spi/spi-qup.c

   969	
   970	static int spi_qup_probe(struct platform_device *pdev)
   971	{
   972		struct spi_master *master;
   973		struct clk *iclk, *cclk;
   974		struct spi_qup *controller;
   975		struct resource *res;
   976		struct device *dev;
   977		void __iomem *base;
   978		u32 max_freq, iomode, num_cs;
   979		int ret, irq, size;
   980	
   981		dev = &pdev->dev;
   982		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
   983		base = devm_ioremap_resource(dev, res);
   984		if (IS_ERR(base))
   985			return PTR_ERR(base);
   986	
   987		irq = platform_get_irq(pdev, 0);
   988		if (irq < 0)
   989			return irq;
   990	
   991		cclk = devm_clk_get(dev, "core");
   992		if (IS_ERR(cclk))
   993			return PTR_ERR(cclk);
   994	
   995		iclk = devm_clk_get(dev, "iface");
   996		if (IS_ERR(iclk))
   997			return PTR_ERR(iclk);
   998	
   999		/* This is optional parameter */
  1000		if (of_property_read_u32(dev->of_node, "spi-max-frequency", &max_freq))
  1001			max_freq = SPI_MAX_RATE;
  1002	
  1003		if (!max_freq || max_freq > SPI_MAX_RATE) {
  1004			dev_err(dev, "invalid clock frequency %d\n", max_freq);
  1005			return -ENXIO;
  1006		}
  1007	
  1008		ret = clk_prepare_enable(cclk);
  1009		if (ret) {
  1010			dev_err(dev, "cannot enable core clock\n");
  1011			return ret;
  1012		}
  1013	
  1014		ret = clk_prepare_enable(iclk);
  1015		if (ret) {
  1016			clk_disable_unprepare(cclk);
  1017			dev_err(dev, "cannot enable iface clock\n");
  1018			return ret;
  1019		}
  1020	
  1021		master = spi_alloc_master(dev, sizeof(struct spi_qup));
  1022		if (!master) {
  1023			clk_disable_unprepare(cclk);
  1024			clk_disable_unprepare(iclk);
  1025			dev_err(dev, "cannot allocate master\n");
  1026			return -ENOMEM;
  1027		}
  1028	
  1029		/* use num-cs unless not present or out of range */
  1030		if (of_property_read_u32(dev->of_node, "num-cs", &num_cs) ||
  1031		    num_cs > SPI_NUM_CHIPSELECTS)
  1032			master->num_chipselect = SPI_NUM_CHIPSELECTS;
  1033		else
  1034			master->num_chipselect = num_cs;
  1035	
  1036		master->bus_num = pdev->id;
  1037		master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH | SPI_LOOP;
  1038		master->bits_per_word_mask = SPI_BPW_RANGE_MASK(4, 32);
  1039		master->max_speed_hz = max_freq;
  1040		master->transfer_one = spi_qup_transfer_one;
  1041		master->dev.of_node = pdev->dev.of_node;
  1042		master->auto_runtime_pm = true;
  1043		master->dma_alignment = dma_get_cache_alignment();
  1044		master->max_dma_len = SPI_MAX_XFER;
  1045	
  1046		platform_set_drvdata(pdev, master);
  1047	
  1048		controller = spi_master_get_devdata(master);
  1049	
  1050		controller->dev = dev;
  1051		controller->base = base;
  1052		controller->iclk = iclk;
  1053		controller->cclk = cclk;
  1054		controller->irq = irq;
  1055	
  1056		ret = spi_qup_init_dma(master, res->start);
  1057		if (ret == -EPROBE_DEFER)
  1058			goto error;
  1059		else if (!ret)
  1060			master->can_dma = spi_qup_can_dma;
  1061	
> 1062		controller->qup_v1 = (int)of_device_get_match_data(dev);
  1063	
  1064		if (!controller->qup_v1)
  1065			master->set_cs = spi_qup_set_cs;
  1066	
  1067		spin_lock_init(&controller->lock);
  1068		init_completion(&controller->done);
  1069	
  1070		iomode = readl_relaxed(base + QUP_IO_M_MODES);
  1071	
  1072		size = QUP_IO_M_OUTPUT_BLOCK_SIZE(iomode);
  1073		if (size)
  1074			controller->out_blk_sz = size * 16;
  1075		else
  1076			controller->out_blk_sz = 4;
  1077	
  1078		size = QUP_IO_M_INPUT_BLOCK_SIZE(iomode);
  1079		if (size)
  1080			controller->in_blk_sz = size * 16;
  1081		else
  1082			controller->in_blk_sz = 4;
  1083	
  1084		size = QUP_IO_M_OUTPUT_FIFO_SIZE(iomode);
  1085		controller->out_fifo_sz = controller->out_blk_sz * (2 << size);
  1086	
  1087		size = QUP_IO_M_INPUT_FIFO_SIZE(iomode);
  1088		controller->in_fifo_sz = controller->in_blk_sz * (2 << size);
  1089	
  1090		dev_info(dev, "IN:block:%d, fifo:%d, OUT:block:%d, fifo:%d\n",
  1091			 controller->in_blk_sz, controller->in_fifo_sz,
  1092			 controller->out_blk_sz, controller->out_fifo_sz);
  1093	
  1094		writel_relaxed(1, base + QUP_SW_RESET);
  1095	
  1096		ret = spi_qup_set_state(controller, QUP_STATE_RESET);
  1097		if (ret) {
  1098			dev_err(dev, "cannot set RESET state\n");
  1099			goto error_dma;
  1100		}
  1101	
  1102		writel_relaxed(0, base + QUP_OPERATIONAL);
  1103		writel_relaxed(0, base + QUP_IO_M_MODES);
  1104	
  1105		if (!controller->qup_v1)
  1106			writel_relaxed(0, base + QUP_OPERATIONAL_MASK);
  1107	
  1108		writel_relaxed(SPI_ERROR_CLK_UNDER_RUN | SPI_ERROR_CLK_OVER_RUN,
  1109			       base + SPI_ERROR_FLAGS_EN);
  1110	
  1111		/* if earlier version of the QUP, disable INPUT_OVERRUN */
  1112		if (controller->qup_v1)
  1113			writel_relaxed(QUP_ERROR_OUTPUT_OVER_RUN |
  1114				QUP_ERROR_INPUT_UNDER_RUN | QUP_ERROR_OUTPUT_UNDER_RUN,
  1115				base + QUP_ERROR_FLAGS_EN);
  1116	
  1117		writel_relaxed(0, base + SPI_CONFIG);
  1118		writel_relaxed(SPI_IO_C_NO_TRI_STATE, base + SPI_IO_CONTROL);
  1119	
  1120		ret = devm_request_irq(dev, irq, spi_qup_qup_irq,
  1121				       IRQF_TRIGGER_HIGH, pdev->name, controller);
  1122		if (ret)
  1123			goto error_dma;
  1124	
  1125		pm_runtime_set_autosuspend_delay(dev, MSEC_PER_SEC);
  1126		pm_runtime_use_autosuspend(dev);
  1127		pm_runtime_set_active(dev);
  1128		pm_runtime_enable(dev);
  1129	
  1130		ret = devm_spi_register_master(dev, master);
  1131		if (ret)
  1132			goto disable_pm;
  1133	
  1134		return 0;
  1135	
  1136	disable_pm:
  1137		pm_runtime_disable(&pdev->dev);
  1138	error_dma:
  1139		spi_qup_release_dma(master);
  1140	error:
  1141		clk_disable_unprepare(cclk);
  1142		clk_disable_unprepare(iclk);
  1143		spi_master_put(master);
  1144		return ret;
  1145	}
  1146	

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 36243 bytes --]

Re: [PATCH v5 14/14] spi: qup: Fix QUP version identify method

[kbuild test robot]

[-- Attachment #1: Type: text/plain, Size: 7812 bytes --]

Hi Varadarajan,

[auto build test WARNING on spi/for-next]
[also build test WARNING on v4.13-rc2 next-20170724]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Varadarajan-Narayanan/spi-qup-Fixes-and-add-support-for-64k-transfers/20170725-033101
base:   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git for-next
config: arm64-defconfig (attached as .config)
compiler: aarch64-linux-gnu-gcc (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
        wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=arm64 

All warnings (new ones prefixed by >>):

   drivers//spi/spi-qup.c: In function 'spi_qup_probe':
>> drivers//spi/spi-qup.c:1062:23: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
     controller->qup_v1 = (int)of_device_get_match_data(dev);
                          ^
   drivers//spi/spi-qup.c: In function 'spi_qup_transfer_one':
   drivers//spi/spi-qup.c:507:28: warning: 'tx_nents' may be used uninitialized in this function [-Wmaybe-uninitialized]
      for (; tx_sgl && tx_nents--; tx_sgl = sg_next(tx_sgl))
                       ~~~~~~~~^~
   drivers//spi/spi-qup.c:464:17: note: 'tx_nents' was declared here
      u32 rx_nents, tx_nents;
                    ^~~~~~~~
   drivers//spi/spi-qup.c:505:28: warning: 'rx_nents' may be used uninitialized in this function [-Wmaybe-uninitialized]
      for (; rx_sgl && rx_nents--; rx_sgl = sg_next(rx_sgl))
                       ~~~~~~~~^~
   drivers//spi/spi-qup.c:464:7: note: 'rx_nents' was declared here
      u32 rx_nents, tx_nents;
          ^~~~~~~~

vim +1062 drivers//spi/spi-qup.c

   969	
   970	static int spi_qup_probe(struct platform_device *pdev)
   971	{
   972		struct spi_master *master;
   973		struct clk *iclk, *cclk;
   974		struct spi_qup *controller;
   975		struct resource *res;
   976		struct device *dev;
   977		void __iomem *base;
   978		u32 max_freq, iomode, num_cs;
   979		int ret, irq, size;
   980	
   981		dev = &pdev->dev;
   982		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
   983		base = devm_ioremap_resource(dev, res);
   984		if (IS_ERR(base))
   985			return PTR_ERR(base);
   986	
   987		irq = platform_get_irq(pdev, 0);
   988		if (irq < 0)
   989			return irq;
   990	
   991		cclk = devm_clk_get(dev, "core");
   992		if (IS_ERR(cclk))
   993			return PTR_ERR(cclk);
   994	
   995		iclk = devm_clk_get(dev, "iface");
   996		if (IS_ERR(iclk))
   997			return PTR_ERR(iclk);
   998	
   999		/* This is optional parameter */
  1000		if (of_property_read_u32(dev->of_node, "spi-max-frequency", &max_freq))
  1001			max_freq = SPI_MAX_RATE;
  1002	
  1003		if (!max_freq || max_freq > SPI_MAX_RATE) {
  1004			dev_err(dev, "invalid clock frequency %d\n", max_freq);
  1005			return -ENXIO;
  1006		}
  1007	
  1008		ret = clk_prepare_enable(cclk);
  1009		if (ret) {
  1010			dev_err(dev, "cannot enable core clock\n");
  1011			return ret;
  1012		}
  1013	
  1014		ret = clk_prepare_enable(iclk);
  1015		if (ret) {
  1016			clk_disable_unprepare(cclk);
  1017			dev_err(dev, "cannot enable iface clock\n");
  1018			return ret;
  1019		}
  1020	
  1021		master = spi_alloc_master(dev, sizeof(struct spi_qup));
  1022		if (!master) {
  1023			clk_disable_unprepare(cclk);
  1024			clk_disable_unprepare(iclk);
  1025			dev_err(dev, "cannot allocate master\n");
  1026			return -ENOMEM;
  1027		}
  1028	
  1029		/* use num-cs unless not present or out of range */
  1030		if (of_property_read_u32(dev->of_node, "num-cs", &num_cs) ||
  1031		    num_cs > SPI_NUM_CHIPSELECTS)
  1032			master->num_chipselect = SPI_NUM_CHIPSELECTS;
  1033		else
  1034			master->num_chipselect = num_cs;
  1035	
  1036		master->bus_num = pdev->id;
  1037		master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH | SPI_LOOP;
  1038		master->bits_per_word_mask = SPI_BPW_RANGE_MASK(4, 32);
  1039		master->max_speed_hz = max_freq;
  1040		master->transfer_one = spi_qup_transfer_one;
  1041		master->dev.of_node = pdev->dev.of_node;
  1042		master->auto_runtime_pm = true;
  1043		master->dma_alignment = dma_get_cache_alignment();
  1044		master->max_dma_len = SPI_MAX_XFER;
  1045	
  1046		platform_set_drvdata(pdev, master);
  1047	
  1048		controller = spi_master_get_devdata(master);
  1049	
  1050		controller->dev = dev;
  1051		controller->base = base;
  1052		controller->iclk = iclk;
  1053		controller->cclk = cclk;
  1054		controller->irq = irq;
  1055	
  1056		ret = spi_qup_init_dma(master, res->start);
  1057		if (ret == -EPROBE_DEFER)
  1058			goto error;
  1059		else if (!ret)
  1060			master->can_dma = spi_qup_can_dma;
  1061	
> 1062		controller->qup_v1 = (int)of_device_get_match_data(dev);
  1063	
  1064		if (!controller->qup_v1)
  1065			master->set_cs = spi_qup_set_cs;
  1066	
  1067		spin_lock_init(&controller->lock);
  1068		init_completion(&controller->done);
  1069	
  1070		iomode = readl_relaxed(base + QUP_IO_M_MODES);
  1071	
  1072		size = QUP_IO_M_OUTPUT_BLOCK_SIZE(iomode);
  1073		if (size)
  1074			controller->out_blk_sz = size * 16;
  1075		else
  1076			controller->out_blk_sz = 4;
  1077	
  1078		size = QUP_IO_M_INPUT_BLOCK_SIZE(iomode);
  1079		if (size)
  1080			controller->in_blk_sz = size * 16;
  1081		else
  1082			controller->in_blk_sz = 4;
  1083	
  1084		size = QUP_IO_M_OUTPUT_FIFO_SIZE(iomode);
  1085		controller->out_fifo_sz = controller->out_blk_sz * (2 << size);
  1086	
  1087		size = QUP_IO_M_INPUT_FIFO_SIZE(iomode);
  1088		controller->in_fifo_sz = controller->in_blk_sz * (2 << size);
  1089	
  1090		dev_info(dev, "IN:block:%d, fifo:%d, OUT:block:%d, fifo:%d\n",
  1091			 controller->in_blk_sz, controller->in_fifo_sz,
  1092			 controller->out_blk_sz, controller->out_fifo_sz);
  1093	
  1094		writel_relaxed(1, base + QUP_SW_RESET);
  1095	
  1096		ret = spi_qup_set_state(controller, QUP_STATE_RESET);
  1097		if (ret) {
  1098			dev_err(dev, "cannot set RESET state\n");
  1099			goto error_dma;
  1100		}
  1101	
  1102		writel_relaxed(0, base + QUP_OPERATIONAL);
  1103		writel_relaxed(0, base + QUP_IO_M_MODES);
  1104	
  1105		if (!controller->qup_v1)
  1106			writel_relaxed(0, base + QUP_OPERATIONAL_MASK);
  1107	
  1108		writel_relaxed(SPI_ERROR_CLK_UNDER_RUN | SPI_ERROR_CLK_OVER_RUN,
  1109			       base + SPI_ERROR_FLAGS_EN);
  1110	
  1111		/* if earlier version of the QUP, disable INPUT_OVERRUN */
  1112		if (controller->qup_v1)
  1113			writel_relaxed(QUP_ERROR_OUTPUT_OVER_RUN |
  1114				QUP_ERROR_INPUT_UNDER_RUN | QUP_ERROR_OUTPUT_UNDER_RUN,
  1115				base + QUP_ERROR_FLAGS_EN);
  1116	
  1117		writel_relaxed(0, base + SPI_CONFIG);
  1118		writel_relaxed(SPI_IO_C_NO_TRI_STATE, base + SPI_IO_CONTROL);
  1119	
  1120		ret = devm_request_irq(dev, irq, spi_qup_qup_irq,
  1121				       IRQF_TRIGGER_HIGH, pdev->name, controller);
  1122		if (ret)
  1123			goto error_dma;
  1124	
  1125		pm_runtime_set_autosuspend_delay(dev, MSEC_PER_SEC);
  1126		pm_runtime_use_autosuspend(dev);
  1127		pm_runtime_set_active(dev);
  1128		pm_runtime_enable(dev);
  1129	
  1130		ret = devm_spi_register_master(dev, master);
  1131		if (ret)
  1132			goto disable_pm;
  1133	
  1134		return 0;
  1135	
  1136	disable_pm:
  1137		pm_runtime_disable(&pdev->dev);
  1138	error_dma:
  1139		spi_qup_release_dma(master);
  1140	error:
  1141		clk_disable_unprepare(cclk);
  1142		clk_disable_unprepare(iclk);
  1143		spi_master_put(master);
  1144		return ret;
  1145	}
  1146	

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 36243 bytes --]

Re: [PATCH v5 14/14] spi: qup: Fix QUP version identify method

[kbuild test robot]

[-- Attachment #1: Type: text/plain, Size: 7812 bytes --]

Hi Varadarajan,

[auto build test WARNING on spi/for-next]
[also build test WARNING on v4.13-rc2 next-20170724]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Varadarajan-Narayanan/spi-qup-Fixes-and-add-support-for-64k-transfers/20170725-033101
base:   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git for-next
config: arm64-defconfig (attached as .config)
compiler: aarch64-linux-gnu-gcc (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
        wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=arm64 

All warnings (new ones prefixed by >>):

   drivers//spi/spi-qup.c: In function 'spi_qup_probe':
>> drivers//spi/spi-qup.c:1062:23: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
     controller->qup_v1 = (int)of_device_get_match_data(dev);
                          ^
   drivers//spi/spi-qup.c: In function 'spi_qup_transfer_one':
   drivers//spi/spi-qup.c:507:28: warning: 'tx_nents' may be used uninitialized in this function [-Wmaybe-uninitialized]
      for (; tx_sgl && tx_nents--; tx_sgl = sg_next(tx_sgl))
                       ~~~~~~~~^~
   drivers//spi/spi-qup.c:464:17: note: 'tx_nents' was declared here
      u32 rx_nents, tx_nents;
                    ^~~~~~~~
   drivers//spi/spi-qup.c:505:28: warning: 'rx_nents' may be used uninitialized in this function [-Wmaybe-uninitialized]
      for (; rx_sgl && rx_nents--; rx_sgl = sg_next(rx_sgl))
                       ~~~~~~~~^~
   drivers//spi/spi-qup.c:464:7: note: 'rx_nents' was declared here
      u32 rx_nents, tx_nents;
          ^~~~~~~~

vim +1062 drivers//spi/spi-qup.c

   969	
   970	static int spi_qup_probe(struct platform_device *pdev)
   971	{
   972		struct spi_master *master;
   973		struct clk *iclk, *cclk;
   974		struct spi_qup *controller;
   975		struct resource *res;
   976		struct device *dev;
   977		void __iomem *base;
   978		u32 max_freq, iomode, num_cs;
   979		int ret, irq, size;
   980	
   981		dev = &pdev->dev;
   982		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
   983		base = devm_ioremap_resource(dev, res);
   984		if (IS_ERR(base))
   985			return PTR_ERR(base);
   986	
   987		irq = platform_get_irq(pdev, 0);
   988		if (irq < 0)
   989			return irq;
   990	
   991		cclk = devm_clk_get(dev, "core");
   992		if (IS_ERR(cclk))
   993			return PTR_ERR(cclk);
   994	
   995		iclk = devm_clk_get(dev, "iface");
   996		if (IS_ERR(iclk))
   997			return PTR_ERR(iclk);
   998	
   999		/* This is optional parameter */
  1000		if (of_property_read_u32(dev->of_node, "spi-max-frequency", &max_freq))
  1001			max_freq = SPI_MAX_RATE;
  1002	
  1003		if (!max_freq || max_freq > SPI_MAX_RATE) {
  1004			dev_err(dev, "invalid clock frequency %d\n", max_freq);
  1005			return -ENXIO;
  1006		}
  1007	
  1008		ret = clk_prepare_enable(cclk);
  1009		if (ret) {
  1010			dev_err(dev, "cannot enable core clock\n");
  1011			return ret;
  1012		}
  1013	
  1014		ret = clk_prepare_enable(iclk);
  1015		if (ret) {
  1016			clk_disable_unprepare(cclk);
  1017			dev_err(dev, "cannot enable iface clock\n");
  1018			return ret;
  1019		}
  1020	
  1021		master = spi_alloc_master(dev, sizeof(struct spi_qup));
  1022		if (!master) {
  1023			clk_disable_unprepare(cclk);
  1024			clk_disable_unprepare(iclk);
  1025			dev_err(dev, "cannot allocate master\n");
  1026			return -ENOMEM;
  1027		}
  1028	
  1029		/* use num-cs unless not present or out of range */
  1030		if (of_property_read_u32(dev->of_node, "num-cs", &num_cs) ||
  1031		    num_cs > SPI_NUM_CHIPSELECTS)
  1032			master->num_chipselect = SPI_NUM_CHIPSELECTS;
  1033		else
  1034			master->num_chipselect = num_cs;
  1035	
  1036		master->bus_num = pdev->id;
  1037		master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH | SPI_LOOP;
  1038		master->bits_per_word_mask = SPI_BPW_RANGE_MASK(4, 32);
  1039		master->max_speed_hz = max_freq;
  1040		master->transfer_one = spi_qup_transfer_one;
  1041		master->dev.of_node = pdev->dev.of_node;
  1042		master->auto_runtime_pm = true;
  1043		master->dma_alignment = dma_get_cache_alignment();
  1044		master->max_dma_len = SPI_MAX_XFER;
  1045	
  1046		platform_set_drvdata(pdev, master);
  1047	
  1048		controller = spi_master_get_devdata(master);
  1049	
  1050		controller->dev = dev;
  1051		controller->base = base;
  1052		controller->iclk = iclk;
  1053		controller->cclk = cclk;
  1054		controller->irq = irq;
  1055	
  1056		ret = spi_qup_init_dma(master, res->start);
  1057		if (ret == -EPROBE_DEFER)
  1058			goto error;
  1059		else if (!ret)
  1060			master->can_dma = spi_qup_can_dma;
  1061	
> 1062		controller->qup_v1 = (int)of_device_get_match_data(dev);
  1063	
  1064		if (!controller->qup_v1)
  1065			master->set_cs = spi_qup_set_cs;
  1066	
  1067		spin_lock_init(&controller->lock);
  1068		init_completion(&controller->done);
  1069	
  1070		iomode = readl_relaxed(base + QUP_IO_M_MODES);
  1071	
  1072		size = QUP_IO_M_OUTPUT_BLOCK_SIZE(iomode);
  1073		if (size)
  1074			controller->out_blk_sz = size * 16;
  1075		else
  1076			controller->out_blk_sz = 4;
  1077	
  1078		size = QUP_IO_M_INPUT_BLOCK_SIZE(iomode);
  1079		if (size)
  1080			controller->in_blk_sz = size * 16;
  1081		else
  1082			controller->in_blk_sz = 4;
  1083	
  1084		size = QUP_IO_M_OUTPUT_FIFO_SIZE(iomode);
  1085		controller->out_fifo_sz = controller->out_blk_sz * (2 << size);
  1086	
  1087		size = QUP_IO_M_INPUT_FIFO_SIZE(iomode);
  1088		controller->in_fifo_sz = controller->in_blk_sz * (2 << size);
  1089	
  1090		dev_info(dev, "IN:block:%d, fifo:%d, OUT:block:%d, fifo:%d\n",
  1091			 controller->in_blk_sz, controller->in_fifo_sz,
  1092			 controller->out_blk_sz, controller->out_fifo_sz);
  1093	
  1094		writel_relaxed(1, base + QUP_SW_RESET);
  1095	
  1096		ret = spi_qup_set_state(controller, QUP_STATE_RESET);
  1097		if (ret) {
  1098			dev_err(dev, "cannot set RESET state\n");
  1099			goto error_dma;
  1100		}
  1101	
  1102		writel_relaxed(0, base + QUP_OPERATIONAL);
  1103		writel_relaxed(0, base + QUP_IO_M_MODES);
  1104	
  1105		if (!controller->qup_v1)
  1106			writel_relaxed(0, base + QUP_OPERATIONAL_MASK);
  1107	
  1108		writel_relaxed(SPI_ERROR_CLK_UNDER_RUN | SPI_ERROR_CLK_OVER_RUN,
  1109			       base + SPI_ERROR_FLAGS_EN);
  1110	
  1111		/* if earlier version of the QUP, disable INPUT_OVERRUN */
  1112		if (controller->qup_v1)
  1113			writel_relaxed(QUP_ERROR_OUTPUT_OVER_RUN |
  1114				QUP_ERROR_INPUT_UNDER_RUN | QUP_ERROR_OUTPUT_UNDER_RUN,
  1115				base + QUP_ERROR_FLAGS_EN);
  1116	
  1117		writel_relaxed(0, base + SPI_CONFIG);
  1118		writel_relaxed(SPI_IO_C_NO_TRI_STATE, base + SPI_IO_CONTROL);
  1119	
  1120		ret = devm_request_irq(dev, irq, spi_qup_qup_irq,
  1121				       IRQF_TRIGGER_HIGH, pdev->name, controller);
  1122		if (ret)
  1123			goto error_dma;
  1124	
  1125		pm_runtime_set_autosuspend_delay(dev, MSEC_PER_SEC);
  1126		pm_runtime_use_autosuspend(dev);
  1127		pm_runtime_set_active(dev);
  1128		pm_runtime_enable(dev);
  1129	
  1130		ret = devm_spi_register_master(dev, master);
  1131		if (ret)
  1132			goto disable_pm;
  1133	
  1134		return 0;
  1135	
  1136	disable_pm:
  1137		pm_runtime_disable(&pdev->dev);
  1138	error_dma:
  1139		spi_qup_release_dma(master);
  1140	error:
  1141		clk_disable_unprepare(cclk);
  1142		clk_disable_unprepare(iclk);
  1143		spi_master_put(master);
  1144		return ret;
  1145	}
  1146	

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 36243 bytes --]

Applied "spi: qup: Fix QUP version identify method" to the spi tree

[Mark Brown]

The patch

   spi: qup: Fix QUP version identify method

has been applied to the spi tree at

   git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 4d023737b2efcaac36e4e6bbfdce3a3b377f3946 Mon Sep 17 00:00:00 2001
From: Varadarajan Narayanan <varada-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
Date: Fri, 28 Jul 2017 12:23:01 +0530
Subject: [PATCH] spi: qup: Fix QUP version identify method

Use of_device_get_match_data to identify QUP version instead
of of_device_is_compatible.

Signed-off-by: Varadarajan Narayanan <varada-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
Signed-off-by: Mark Brown <broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
---
 drivers/spi/spi-qup.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
index 4c3c938360f4..1364516e87c2 100644
--- a/drivers/spi/spi-qup.c
+++ b/drivers/spi/spi-qup.c
@@ -19,6 +19,7 @@
 #include <linux/list.h>
 #include <linux/module.h>
 #include <linux/of.h>
+#include <linux/of_device.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/spi/spi.h>
@@ -1058,9 +1059,7 @@ static int spi_qup_probe(struct platform_device *pdev)
 	else if (!ret)
 		master->can_dma = spi_qup_can_dma;
 
-	/* set v1 flag if device is version 1 */
-	if (of_device_is_compatible(dev->of_node, "qcom,spi-qup-v1.1.1"))
-		controller->qup_v1 = 1;
+	controller->qup_v1 = (int)of_device_get_match_data(dev);
 
 	if (!controller->qup_v1)
 		master->set_cs = spi_qup_set_cs;
@@ -1256,7 +1255,7 @@ static int spi_qup_remove(struct platform_device *pdev)
 }
 
 static const struct of_device_id spi_qup_dt_match[] = {
-	{ .compatible = "qcom,spi-qup-v1.1.1", },
+	{ .compatible = "qcom,spi-qup-v1.1.1", .data = (void *)1, },
 	{ .compatible = "qcom,spi-qup-v2.1.1", },
 	{ .compatible = "qcom,spi-qup-v2.2.1", },
 	{ }
-- 
2.13.2

--
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Applied "spi: qup: Fix QUP version identify method" to the spi tree

[Mark Brown]

The patch

   spi: qup: Fix QUP version identify method

has been applied to the spi tree at

   git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 4d023737b2efcaac36e4e6bbfdce3a3b377f3946 Mon Sep 17 00:00:00 2001
From: Varadarajan Narayanan <varada-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
Date: Fri, 28 Jul 2017 12:23:01 +0530
Subject: [PATCH] spi: qup: Fix QUP version identify method

Use of_device_get_match_data to identify QUP version instead
of of_device_is_compatible.

Signed-off-by: Varadarajan Narayanan <varada-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
Signed-off-by: Mark Brown <broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
---
 drivers/spi/spi-qup.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
index 4c3c938360f4..1364516e87c2 100644
--- a/drivers/spi/spi-qup.c
+++ b/drivers/spi/spi-qup.c
@@ -19,6 +19,7 @@
 #include <linux/list.h>
 #include <linux/module.h>
 #include <linux/of.h>
+#include <linux/of_device.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/spi/spi.h>
@@ -1058,9 +1059,7 @@ static int spi_qup_probe(struct platform_device *pdev)
 	else if (!ret)
 		master->can_dma = spi_qup_can_dma;
 
-	/* set v1 flag if device is version 1 */
-	if (of_device_is_compatible(dev->of_node, "qcom,spi-qup-v1.1.1"))
-		controller->qup_v1 = 1;
+	controller->qup_v1 = (int)of_device_get_match_data(dev);
 
 	if (!controller->qup_v1)
 		master->set_cs = spi_qup_set_cs;
@@ -1256,7 +1255,7 @@ static int spi_qup_remove(struct platform_device *pdev)
 }
 
 static const struct of_device_id spi_qup_dt_match[] = {
-	{ .compatible = "qcom,spi-qup-v1.1.1", },
+	{ .compatible = "qcom,spi-qup-v1.1.1", .data = (void *)1, },
 	{ .compatible = "qcom,spi-qup-v2.1.1", },
 	{ .compatible = "qcom,spi-qup-v2.2.1", },
 	{ }
-- 
2.13.2

--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Applied "spi: qup: Fix QUP version identify method" to the spi tree

[Mark Brown]

The patch

   spi: qup: Fix QUP version identify method

has been applied to the spi tree at

   git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 4d023737b2efcaac36e4e6bbfdce3a3b377f3946 Mon Sep 17 00:00:00 2001
From: Varadarajan Narayanan <varada@codeaurora.org>
Date: Fri, 28 Jul 2017 12:23:01 +0530
Subject: [PATCH] spi: qup: Fix QUP version identify method

Use of_device_get_match_data to identify QUP version instead
of of_device_is_compatible.

Signed-off-by: Varadarajan Narayanan <varada@codeaurora.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/spi/spi-qup.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
index 4c3c938360f4..1364516e87c2 100644
--- a/drivers/spi/spi-qup.c
+++ b/drivers/spi/spi-qup.c
@@ -19,6 +19,7 @@
 #include <linux/list.h>
 #include <linux/module.h>
 #include <linux/of.h>
+#include <linux/of_device.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/spi/spi.h>
@@ -1058,9 +1059,7 @@ static int spi_qup_probe(struct platform_device *pdev)
 	else if (!ret)
 		master->can_dma = spi_qup_can_dma;
 
-	/* set v1 flag if device is version 1 */
-	if (of_device_is_compatible(dev->of_node, "qcom,spi-qup-v1.1.1"))
-		controller->qup_v1 = 1;
+	controller->qup_v1 = (int)of_device_get_match_data(dev);
 
 	if (!controller->qup_v1)
 		master->set_cs = spi_qup_set_cs;
@@ -1256,7 +1255,7 @@ static int spi_qup_remove(struct platform_device *pdev)
 }
 
 static const struct of_device_id spi_qup_dt_match[] = {
-	{ .compatible = "qcom,spi-qup-v1.1.1", },
+	{ .compatible = "qcom,spi-qup-v1.1.1", .data = (void *)1, },
 	{ .compatible = "qcom,spi-qup-v2.1.1", },
 	{ .compatible = "qcom,spi-qup-v2.2.1", },
 	{ }
-- 
2.13.2