From: Sowjanya Komatineni <skomatineni@nvidia.com>
To: <thierry.reding@gmail.com>, <jonathanh@nvidia.com>,
<talho@nvidia.com>, <skomatineni@nvidia.com>,
<broonie@kernel.org>, <robh+dt@kernel.org>,
<mark.rutland@arm.com>, <kyarlagadda@nvidia.com>
Cc: <ldewangan@nvidia.com>, <linux-tegra@vger.kernel.org>,
<linux-kernel@vger.kernel.org>, <linux-spi@vger.kernel.org>,
<devicetree@vger.kernel.org>
Subject: [PATCH V1 09/26] spi: tegra114: dump SPI registers during timeout
Date: Tue, 26 Mar 2019 22:56:30 -0700 [thread overview]
Message-ID: <1553666207-11414-9-git-send-email-skomatineni@nvidia.com> (raw)
In-Reply-To: <1553666207-11414-1-git-send-email-skomatineni@nvidia.com>
This patch dumps SPI registers on DMA or transfer timeout for debug
purpose.
Signed-off-by: Sowjanya Komatineni <skomatineni@nvidia.com>
---
drivers/spi/spi-tegra114.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/drivers/spi/spi-tegra114.c b/drivers/spi/spi-tegra114.c
index b7e71676a506..268a790a663e 100644
--- a/drivers/spi/spi-tegra114.c
+++ b/drivers/spi/spi-tegra114.c
@@ -858,6 +858,20 @@ static void tegra_spi_transfer_delay(int delay)
udelay(delay % 1000);
}
+static void tegra_spi_dump_regs(struct tegra_spi_data *tspi)
+{
+ dev_dbg(tspi->dev, "============ SPI REGISTER DUMP ============\n");
+ dev_dbg(tspi->dev, "Command1: 0x%08x | Command2: 0x%08x\n",
+ tegra_spi_readl(tspi, SPI_COMMAND1),
+ tegra_spi_readl(tspi, SPI_COMMAND2));
+ dev_dbg(tspi->dev, "DMA_CTL: 0x%08x | DMA_BLK: 0x%08x\n",
+ tegra_spi_readl(tspi, SPI_DMA_CTL),
+ tegra_spi_readl(tspi, SPI_DMA_BLK));
+ dev_dbg(tspi->dev, "TRANS_STAT: 0x%08x | FIFO_STATUS: 0x%08x\n",
+ tegra_spi_readl(tspi, SPI_TRANS_STATUS),
+ tegra_spi_readl(tspi, SPI_FIFO_STATUS));
+}
+
static int tegra_spi_transfer_one_message(struct spi_master *master,
struct spi_message *msg)
{
@@ -904,6 +918,7 @@ static int tegra_spi_transfer_one_message(struct spi_master *master,
(tspi->cur_direction & DATA_DIR_RX))
dmaengine_terminate_all(tspi->rx_dma_chan);
ret = -EIO;
+ tegra_spi_dump_regs(tspi);
tegra_spi_flush_fifos(tspi);
reset_control_assert(tspi->rst);
udelay(2);
@@ -913,6 +928,7 @@ static int tegra_spi_transfer_one_message(struct spi_master *master,
if (tspi->tx_status || tspi->rx_status) {
dev_err(tspi->dev, "Error in Transfer\n");
+ tegra_spi_dump_regs(tspi);
ret = -EIO;
goto complete_xfer;
}
@@ -958,6 +974,7 @@ static irqreturn_t handle_cpu_based_xfer(struct tegra_spi_data *tspi)
tspi->status_reg);
dev_err(tspi->dev, "CpuXfer 0x%08x:0x%08x\n",
tspi->command1_reg, tspi->dma_control_reg);
+ tegra_spi_dump_regs(tspi);
tegra_spi_flush_fifos(tspi);
reset_control_assert(tspi->rst);
udelay(2);
@@ -1031,6 +1048,7 @@ static irqreturn_t handle_dma_based_xfer(struct tegra_spi_data *tspi)
tspi->status_reg);
dev_err(tspi->dev, "DmaXfer 0x%08x:0x%08x\n",
tspi->command1_reg, tspi->dma_control_reg);
+ tegra_spi_dump_regs(tspi);
tegra_spi_flush_fifos(tspi);
reset_control_assert(tspi->rst);
udelay(2);
--
2.7.4
next prev parent reply other threads:[~2019-03-27 5:59 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-27 5:56 [PATCH V1 01/26] spi: tegra114: fix PIO transfer Sowjanya Komatineni
2019-03-27 5:56 ` [PATCH V1 02/26] spi: tegra114: clear packed bit for unpacked mode Sowjanya Komatineni
2019-04-01 8:54 ` Applied "spi: tegra114: clear packed bit for unpacked mode" to the spi tree Mark Brown
2019-03-27 5:56 ` [PATCH V1 03/26] spi: tegra114: fix for unpacked mode transfers Sowjanya Komatineni
2019-04-01 8:54 ` Applied "spi: tegra114: fix for unpacked mode transfers" to the spi tree Mark Brown
2019-03-27 5:56 ` [PATCH V1 04/26] spi: tegra114: use packed mode for 32 bits per word Sowjanya Komatineni
2019-04-01 7:39 ` Mark Brown
2019-04-01 18:38 ` Sowjanya Komatineni
2019-04-01 8:54 ` Applied "spi: tegra114: use packed mode for 32 bits per word" to the spi tree Mark Brown
2019-03-27 5:56 ` [PATCH V1 05/26] spi: tegra114: use unpacked mode for below 4 byte transfers Sowjanya Komatineni
2019-04-01 8:26 ` Mark Brown
2019-03-27 5:56 ` [PATCH V1 06/26] spi: tegra114: terminate dma and reset on transfer timeout Sowjanya Komatineni
2019-04-01 8:54 ` Applied "spi: tegra114: terminate dma and reset on transfer timeout" to the spi tree Mark Brown
2019-03-27 5:56 ` [PATCH V1 07/26] spi: tegra114: flush fifos Sowjanya Komatineni
2019-04-01 8:54 ` Applied "spi: tegra114: flush fifos" to the spi tree Mark Brown
2019-03-27 5:56 ` [PATCH V1 08/26] spi: tegra114: configure dma burst size to fifo trig level Sowjanya Komatineni
2019-03-27 5:56 ` Sowjanya Komatineni [this message]
2019-04-01 7:39 ` [PATCH V1 09/26] spi: tegra114: dump SPI registers during timeout Mark Brown
2019-03-27 5:56 ` [PATCH V1 10/26] spi: tegra114: avoid reset call in atomic context Sowjanya Komatineni
2019-03-27 5:56 ` [PATCH V1 11/26] spi: tegra114: reset controller on probe Sowjanya Komatineni
2019-04-01 8:54 ` Applied "spi: tegra114: reset controller on probe" to the spi tree Mark Brown
2019-03-27 5:56 ` [PATCH V1 12/26] spi: tegra114: add SPI_LSB_FIRST support Sowjanya Komatineni
2019-04-01 8:54 ` Applied "spi: tegra114: add SPI_LSB_FIRST support" to the spi tree Mark Brown
2019-03-27 5:56 ` [PATCH V1 13/26] spi: tegra114: add dual mode support Sowjanya Komatineni
2019-03-27 5:56 ` [PATCH V1 14/26] spi: tegra114: add 3 wire transfer " Sowjanya Komatineni
2019-03-27 5:56 ` [PATCH V1 15/26] spi: tegra114: set supported bits_per_word Sowjanya Komatineni
2019-03-27 5:56 ` [PATCH V1 16/26] spi: tegra114: set bus number based on id Sowjanya Komatineni
2019-03-27 5:56 ` [PATCH V1 17/26] spi: tegra114: add support for interrupt mask Sowjanya Komatineni
2019-03-27 5:56 ` [PATCH V1 18/26] spi: tegra114: add support for hw based cs Sowjanya Komatineni
2019-04-01 7:48 ` Mark Brown
2019-04-01 18:40 ` Sowjanya Komatineni
2019-03-27 5:56 ` [PATCH V1 19/26] DT bindings: spi: add spi client device properties Sowjanya Komatineni
2019-04-01 7:37 ` Mark Brown
2019-04-01 17:59 ` Sowjanya Komatineni
2019-04-02 4:52 ` Mark Brown
2019-03-27 5:56 ` [PATCH V1 20/26] spi: tegra114: add support for tuning HW CS timing Sowjanya Komatineni
2019-03-27 5:56 ` [PATCH V1 21/26] DT bindings: spi: add tx/rx clock delay SPI client properties Sowjanya Komatineni
2019-03-31 6:42 ` Rob Herring
2019-04-02 20:27 ` Sowjanya Komatineni
2019-03-27 5:56 ` [PATCH V1 22/26] spi: tegra114: add support for tuning clock delay Sowjanya Komatineni
2019-03-27 5:56 ` [PATCH V1 23/26] spi: tegra114: add support for gpio based cs Sowjanya Komatineni
2019-03-27 5:56 ` [PATCH V1 24/26] spi: tegra114: de-assert CS before SPI mode is reset to its default Sowjanya Komatineni
2019-04-01 7:49 ` Mark Brown
2019-04-01 18:07 ` Sowjanya Komatineni
2019-04-02 4:52 ` Mark Brown
2019-03-27 5:56 ` [PATCH V1 25/26] spi: expand mode and mode_bits support Sowjanya Komatineni
2019-03-27 5:56 ` [PATCH V1 26/26] spi: tegra114: add support for LSBYTE_FIRST Sowjanya Komatineni
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