From: Tudor Ambarus <tudor.ambarus@linaro.org>
To: broonie@kernel.org, andi.shyti@kernel.org, semen.protsenko@linaro.org
Cc: krzysztof.kozlowski@linaro.org, alim.akhtar@samsung.com,
jassi.brar@samsung.com, linux-spi@vger.kernel.org,
linux-samsung-soc@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, andre.draszik@linaro.org,
peter.griffin@linaro.org, kernel-team@android.com,
willmcvicker@google.com, Tudor Ambarus <tudor.ambarus@linaro.org>
Subject: [PATCH v3 17/17] spi: s3c64xx: use bitfield access macros
Date: Fri, 26 Jan 2024 17:15:45 +0000 [thread overview]
Message-ID: <20240126171546.1233172-18-tudor.ambarus@linaro.org> (raw)
In-Reply-To: <20240126171546.1233172-1-tudor.ambarus@linaro.org>
Use the bitfield access macros in order to clean and to make the driver
easier to read. Introduce S3C64XX_SPI_MAX_TRAILCNT_MASK to replace value
and offset equivalents (S3C64XX_SPI_MAX_TRAILCNT,
S3C64XX_SPI_TRAILCNT_OFF). While touching the register definitions, align
their values to the same offset.
No functional change intended, the bit operations shall be equivalent.
Signed-off-by: Tudor Ambarus <tudor.ambarus@linaro.org>
---
drivers/spi/spi-s3c64xx.c | 193 ++++++++++++++++++++------------------
1 file changed, 101 insertions(+), 92 deletions(-)
diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c
index 43b888c8812e..7f052d6cd2ba 100644
--- a/drivers/spi/spi-s3c64xx.c
+++ b/drivers/spi/spi-s3c64xx.c
@@ -4,6 +4,7 @@
// Jaswinder Singh <jassi.brar@samsung.com>
#include <linux/bits.h>
+#include <linux/bitfield.h>
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/dma-mapping.h>
@@ -18,91 +19,96 @@
#include <linux/pm_runtime.h>
#include <linux/spi/spi.h>
-#define MAX_SPI_PORTS 12
-#define S3C64XX_SPI_QUIRK_CS_AUTO (1 << 1)
-#define AUTOSUSPEND_TIMEOUT 2000
+#define MAX_SPI_PORTS 12
+#define S3C64XX_SPI_QUIRK_CS_AUTO BIT(1)
+#define AUTOSUSPEND_TIMEOUT 2000
/* Registers and bit-fields */
-#define S3C64XX_SPI_CH_CFG 0x00
-#define S3C64XX_SPI_CLK_CFG 0x04
-#define S3C64XX_SPI_MODE_CFG 0x08
-#define S3C64XX_SPI_CS_REG 0x0C
-#define S3C64XX_SPI_INT_EN 0x10
-#define S3C64XX_SPI_STATUS 0x14
-#define S3C64XX_SPI_TX_DATA 0x18
-#define S3C64XX_SPI_RX_DATA 0x1C
-#define S3C64XX_SPI_PACKET_CNT 0x20
-#define S3C64XX_SPI_PENDING_CLR 0x24
-#define S3C64XX_SPI_SWAP_CFG 0x28
-#define S3C64XX_SPI_FB_CLK 0x2C
-
-#define S3C64XX_SPI_CH_HS_EN (1<<6) /* High Speed Enable */
-#define S3C64XX_SPI_CH_SW_RST (1<<5)
-#define S3C64XX_SPI_CH_SLAVE (1<<4)
-#define S3C64XX_SPI_CPOL_L (1<<3)
-#define S3C64XX_SPI_CPHA_B (1<<2)
-#define S3C64XX_SPI_CH_RXCH_ON (1<<1)
-#define S3C64XX_SPI_CH_TXCH_ON (1<<0)
-
-#define S3C64XX_SPI_CLKSEL_SRCMSK (3<<9)
-#define S3C64XX_SPI_CLKSEL_SRCSHFT 9
-#define S3C64XX_SPI_ENCLK_ENABLE (1<<8)
-#define S3C64XX_SPI_PSR_MASK 0xff
-
-#define S3C64XX_SPI_MODE_CH_TSZ_BYTE (0<<29)
-#define S3C64XX_SPI_MODE_CH_TSZ_HALFWORD (1<<29)
-#define S3C64XX_SPI_MODE_CH_TSZ_WORD (2<<29)
-#define S3C64XX_SPI_MODE_CH_TSZ_MASK (3<<29)
-#define S3C64XX_SPI_MODE_BUS_TSZ_BYTE (0<<17)
-#define S3C64XX_SPI_MODE_BUS_TSZ_HALFWORD (1<<17)
-#define S3C64XX_SPI_MODE_BUS_TSZ_WORD (2<<17)
-#define S3C64XX_SPI_MODE_BUS_TSZ_MASK (3<<17)
+#define S3C64XX_SPI_CH_CFG 0x00
+#define S3C64XX_SPI_CLK_CFG 0x04
+#define S3C64XX_SPI_MODE_CFG 0x08
+#define S3C64XX_SPI_CS_REG 0x0C
+#define S3C64XX_SPI_INT_EN 0x10
+#define S3C64XX_SPI_STATUS 0x14
+#define S3C64XX_SPI_TX_DATA 0x18
+#define S3C64XX_SPI_RX_DATA 0x1C
+#define S3C64XX_SPI_PACKET_CNT 0x20
+#define S3C64XX_SPI_PENDING_CLR 0x24
+#define S3C64XX_SPI_SWAP_CFG 0x28
+#define S3C64XX_SPI_FB_CLK 0x2C
+
+#define S3C64XX_SPI_CH_HS_EN BIT(6) /* High Speed Enable */
+#define S3C64XX_SPI_CH_SW_RST BIT(5)
+#define S3C64XX_SPI_CH_SLAVE BIT(4)
+#define S3C64XX_SPI_CPOL_L BIT(3)
+#define S3C64XX_SPI_CPHA_B BIT(2)
+#define S3C64XX_SPI_CH_RXCH_ON BIT(1)
+#define S3C64XX_SPI_CH_TXCH_ON BIT(0)
+
+#define S3C64XX_SPI_CLKSEL_SRCMSK GENMASK(10, 9)
+#define S3C64XX_SPI_ENCLK_ENABLE BIT(8)
+#define S3C64XX_SPI_PSR_MASK GENMASK(7, 0)
+
+#define S3C64XX_SPI_MODE_CH_TSZ_MASK GENMASK(30, 29)
+#define S3C64XX_SPI_MODE_CH_TSZ_BYTE 0
+#define S3C64XX_SPI_MODE_CH_TSZ_HALFWORD 1
+#define S3C64XX_SPI_MODE_CH_TSZ_WORD 2
+#define S3C64XX_SPI_MAX_TRAILCNT_MASK GENMASK(28, 19)
+#define S3C64XX_SPI_MODE_BUS_TSZ_MASK GENMASK(18, 17)
+#define S3C64XX_SPI_MODE_BUS_TSZ_BYTE 0
+#define S3C64XX_SPI_MODE_BUS_TSZ_HALFWORD 1
+#define S3C64XX_SPI_MODE_BUS_TSZ_WORD 2
#define S3C64XX_SPI_MODE_RX_RDY_LVL GENMASK(16, 11)
-#define S3C64XX_SPI_MODE_RX_RDY_LVL_SHIFT 11
-#define S3C64XX_SPI_MODE_SELF_LOOPBACK (1<<3)
-#define S3C64XX_SPI_MODE_RXDMA_ON (1<<2)
-#define S3C64XX_SPI_MODE_TXDMA_ON (1<<1)
-#define S3C64XX_SPI_MODE_4BURST (1<<0)
-
-#define S3C64XX_SPI_CS_NSC_CNT_2 (2<<4)
-#define S3C64XX_SPI_CS_AUTO (1<<1)
-#define S3C64XX_SPI_CS_SIG_INACT (1<<0)
-
-#define S3C64XX_SPI_INT_TRAILING_EN (1<<6)
-#define S3C64XX_SPI_INT_RX_OVERRUN_EN (1<<5)
-#define S3C64XX_SPI_INT_RX_UNDERRUN_EN (1<<4)
-#define S3C64XX_SPI_INT_TX_OVERRUN_EN (1<<3)
-#define S3C64XX_SPI_INT_TX_UNDERRUN_EN (1<<2)
-#define S3C64XX_SPI_INT_RX_FIFORDY_EN (1<<1)
-#define S3C64XX_SPI_INT_TX_FIFORDY_EN (1<<0)
-
-#define S3C64XX_SPI_ST_RX_OVERRUN_ERR (1<<5)
-#define S3C64XX_SPI_ST_RX_UNDERRUN_ERR (1<<4)
-#define S3C64XX_SPI_ST_TX_OVERRUN_ERR (1<<3)
-#define S3C64XX_SPI_ST_TX_UNDERRUN_ERR (1<<2)
-#define S3C64XX_SPI_ST_RX_FIFORDY (1<<1)
-#define S3C64XX_SPI_ST_TX_FIFORDY (1<<0)
-
-#define S3C64XX_SPI_PACKET_CNT_EN (1<<16)
+#define S3C64XX_SPI_MODE_SELF_LOOPBACK BIT(3)
+#define S3C64XX_SPI_MODE_RXDMA_ON BIT(2)
+#define S3C64XX_SPI_MODE_TXDMA_ON BIT(1)
+#define S3C64XX_SPI_MODE_4BURST BIT(0)
+
+/*
+ * S3C64XX_SPI_CS_NSC_CNT_2 is a value into the NCS_TIME_COUNT field. In newer
+ * datasheets this field is defined as GENMASK(9, 4). We don't know if this mask
+ * applies to all the versions of the IP, thus we can't yet define
+ * S3C64XX_SPI_CS_NSC_CNT_2 as a value and the register field as a mask.
+ */
+#define S3C64XX_SPI_CS_NSC_CNT_2 (2 << 4)
+#define S3C64XX_SPI_CS_AUTO BIT(1)
+#define S3C64XX_SPI_CS_SIG_INACT BIT(0)
+
+#define S3C64XX_SPI_INT_TRAILING_EN BIT(6)
+#define S3C64XX_SPI_INT_RX_OVERRUN_EN BIT(5)
+#define S3C64XX_SPI_INT_RX_UNDERRUN_EN BIT(4)
+#define S3C64XX_SPI_INT_TX_OVERRUN_EN BIT(3)
+#define S3C64XX_SPI_INT_TX_UNDERRUN_EN BIT(2)
+#define S3C64XX_SPI_INT_RX_FIFORDY_EN BIT(1)
+#define S3C64XX_SPI_INT_TX_FIFORDY_EN BIT(0)
+
+#define S3C64XX_SPI_ST_RX_OVERRUN_ERR BIT(5)
+#define S3C64XX_SPI_ST_RX_UNDERRUN_ERR BIT(4)
+#define S3C64XX_SPI_ST_TX_OVERRUN_ERR BIT(3)
+#define S3C64XX_SPI_ST_TX_UNDERRUN_ERR BIT(2)
+#define S3C64XX_SPI_ST_RX_FIFORDY BIT(1)
+#define S3C64XX_SPI_ST_TX_FIFORDY BIT(0)
+
+#define S3C64XX_SPI_PACKET_CNT_EN BIT(16)
#define S3C64XX_SPI_PACKET_CNT_MASK GENMASK(15, 0)
-#define S3C64XX_SPI_PND_TX_UNDERRUN_CLR (1<<4)
-#define S3C64XX_SPI_PND_TX_OVERRUN_CLR (1<<3)
-#define S3C64XX_SPI_PND_RX_UNDERRUN_CLR (1<<2)
-#define S3C64XX_SPI_PND_RX_OVERRUN_CLR (1<<1)
-#define S3C64XX_SPI_PND_TRAILING_CLR (1<<0)
+#define S3C64XX_SPI_PND_TX_UNDERRUN_CLR BIT(4)
+#define S3C64XX_SPI_PND_TX_OVERRUN_CLR BIT(3)
+#define S3C64XX_SPI_PND_RX_UNDERRUN_CLR BIT(2)
+#define S3C64XX_SPI_PND_RX_OVERRUN_CLR BIT(1)
+#define S3C64XX_SPI_PND_TRAILING_CLR BIT(0)
-#define S3C64XX_SPI_SWAP_RX_HALF_WORD (1<<7)
-#define S3C64XX_SPI_SWAP_RX_BYTE (1<<6)
-#define S3C64XX_SPI_SWAP_RX_BIT (1<<5)
-#define S3C64XX_SPI_SWAP_RX_EN (1<<4)
-#define S3C64XX_SPI_SWAP_TX_HALF_WORD (1<<3)
-#define S3C64XX_SPI_SWAP_TX_BYTE (1<<2)
-#define S3C64XX_SPI_SWAP_TX_BIT (1<<1)
-#define S3C64XX_SPI_SWAP_TX_EN (1<<0)
+#define S3C64XX_SPI_SWAP_RX_HALF_WORD BIT(7)
+#define S3C64XX_SPI_SWAP_RX_BYTE BIT(6)
+#define S3C64XX_SPI_SWAP_RX_BIT BIT(5)
+#define S3C64XX_SPI_SWAP_RX_EN BIT(4)
+#define S3C64XX_SPI_SWAP_TX_HALF_WORD BIT(3)
+#define S3C64XX_SPI_SWAP_TX_BYTE BIT(2)
+#define S3C64XX_SPI_SWAP_TX_BIT BIT(1)
+#define S3C64XX_SPI_SWAP_TX_EN BIT(0)
-#define S3C64XX_SPI_FBCLK_MSK (3<<0)
+#define S3C64XX_SPI_FBCLK_MASK GENMASK(1, 0)
#define FIFO_LVL_MASK(i) ((i)->port_conf->fifo_lvl_mask[i->port_id])
#define S3C64XX_SPI_ST_TX_DONE(v, i) (((v) & \
@@ -112,16 +118,13 @@
FIFO_LVL_MASK(i))
#define FIFO_DEPTH(i) ((FIFO_LVL_MASK(i) >> 1) + 1)
-#define S3C64XX_SPI_MAX_TRAILCNT 0x3ff
-#define S3C64XX_SPI_TRAILCNT_OFF 19
-
#define S3C64XX_SPI_POLLING_SIZE 32
#define msecs_to_loops(t) (loops_per_jiffy / 1000 * HZ * t)
#define is_polling(x) (x->cntrlr_info->polling)
-#define RXBUSY (1<<2)
-#define TXBUSY (1<<3)
+#define RXBUSY BIT(2)
+#define TXBUSY BIT(3)
struct s3c64xx_spi_dma_data {
struct dma_chan *ch;
@@ -664,16 +667,22 @@ static int s3c64xx_spi_config(struct s3c64xx_spi_driver_data *sdd)
switch (sdd->cur_bpw) {
case 32:
- val |= S3C64XX_SPI_MODE_BUS_TSZ_WORD;
- val |= S3C64XX_SPI_MODE_CH_TSZ_WORD;
+ val |= FIELD_PREP(S3C64XX_SPI_MODE_BUS_TSZ_MASK,
+ S3C64XX_SPI_MODE_BUS_TSZ_WORD) |
+ FIELD_PREP(S3C64XX_SPI_MODE_CH_TSZ_MASK,
+ S3C64XX_SPI_MODE_CH_TSZ_WORD);
break;
case 16:
- val |= S3C64XX_SPI_MODE_BUS_TSZ_HALFWORD;
- val |= S3C64XX_SPI_MODE_CH_TSZ_HALFWORD;
+ val |= FIELD_PREP(S3C64XX_SPI_MODE_BUS_TSZ_MASK,
+ S3C64XX_SPI_MODE_BUS_TSZ_HALFWORD) |
+ FIELD_PREP(S3C64XX_SPI_MODE_CH_TSZ_MASK,
+ S3C64XX_SPI_MODE_CH_TSZ_HALFWORD);
break;
default:
- val |= S3C64XX_SPI_MODE_BUS_TSZ_BYTE;
- val |= S3C64XX_SPI_MODE_CH_TSZ_BYTE;
+ val |= FIELD_PREP(S3C64XX_SPI_MODE_BUS_TSZ_MASK,
+ S3C64XX_SPI_MODE_BUS_TSZ_BYTE) |
+ FIELD_PREP(S3C64XX_SPI_MODE_CH_TSZ_MASK,
+ S3C64XX_SPI_MODE_CH_TSZ_BYTE);
break;
}
@@ -799,7 +808,7 @@ static int s3c64xx_spi_transfer_one(struct spi_controller *host,
val = readl(sdd->regs + S3C64XX_SPI_MODE_CFG);
val &= ~S3C64XX_SPI_MODE_RX_RDY_LVL;
- val |= (rdy_lv << S3C64XX_SPI_MODE_RX_RDY_LVL_SHIFT);
+ val |= FIELD_PREP(S3C64XX_SPI_MODE_RX_RDY_LVL, rdy_lv);
writel(val, sdd->regs + S3C64XX_SPI_MODE_CFG);
/* Enable FIFO_RDY_EN IRQ */
@@ -1072,8 +1081,8 @@ static void s3c64xx_spi_hwinit(struct s3c64xx_spi_driver_data *sdd)
writel(0, regs + S3C64XX_SPI_INT_EN);
if (!sdd->port_conf->clk_from_cmu)
- writel(sci->src_clk_nr << S3C64XX_SPI_CLKSEL_SRCSHFT,
- regs + S3C64XX_SPI_CLK_CFG);
+ writel(FIELD_PREP(S3C64XX_SPI_CLKSEL_SRCMSK, sci->src_clk_nr),
+ regs + S3C64XX_SPI_CLK_CFG);
writel(0, regs + S3C64XX_SPI_MODE_CFG);
writel(0, regs + S3C64XX_SPI_PACKET_CNT);
@@ -1089,7 +1098,7 @@ static void s3c64xx_spi_hwinit(struct s3c64xx_spi_driver_data *sdd)
val = readl(regs + S3C64XX_SPI_MODE_CFG);
val &= ~S3C64XX_SPI_MODE_4BURST;
- val |= (S3C64XX_SPI_MAX_TRAILCNT << S3C64XX_SPI_TRAILCNT_OFF);
+ val |= S3C64XX_SPI_MAX_TRAILCNT_MASK;
writel(val, regs + S3C64XX_SPI_MODE_CFG);
s3c64xx_flush_fifo(sdd);
--
2.43.0.429.g432eaa2c6b-goog
WARNING: multiple messages have this Message-ID (diff)
From: Tudor Ambarus <tudor.ambarus@linaro.org>
To: broonie@kernel.org, andi.shyti@kernel.org, semen.protsenko@linaro.org
Cc: krzysztof.kozlowski@linaro.org, alim.akhtar@samsung.com,
jassi.brar@samsung.com, linux-spi@vger.kernel.org,
linux-samsung-soc@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, andre.draszik@linaro.org,
peter.griffin@linaro.org, kernel-team@android.com,
willmcvicker@google.com, Tudor Ambarus <tudor.ambarus@linaro.org>
Subject: [PATCH v3 17/17] spi: s3c64xx: use bitfield access macros
Date: Fri, 26 Jan 2024 17:15:45 +0000 [thread overview]
Message-ID: <20240126171546.1233172-18-tudor.ambarus@linaro.org> (raw)
In-Reply-To: <20240126171546.1233172-1-tudor.ambarus@linaro.org>
Use the bitfield access macros in order to clean and to make the driver
easier to read. Introduce S3C64XX_SPI_MAX_TRAILCNT_MASK to replace value
and offset equivalents (S3C64XX_SPI_MAX_TRAILCNT,
S3C64XX_SPI_TRAILCNT_OFF). While touching the register definitions, align
their values to the same offset.
No functional change intended, the bit operations shall be equivalent.
Signed-off-by: Tudor Ambarus <tudor.ambarus@linaro.org>
---
drivers/spi/spi-s3c64xx.c | 193 ++++++++++++++++++++------------------
1 file changed, 101 insertions(+), 92 deletions(-)
diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c
index 43b888c8812e..7f052d6cd2ba 100644
--- a/drivers/spi/spi-s3c64xx.c
+++ b/drivers/spi/spi-s3c64xx.c
@@ -4,6 +4,7 @@
// Jaswinder Singh <jassi.brar@samsung.com>
#include <linux/bits.h>
+#include <linux/bitfield.h>
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/dma-mapping.h>
@@ -18,91 +19,96 @@
#include <linux/pm_runtime.h>
#include <linux/spi/spi.h>
-#define MAX_SPI_PORTS 12
-#define S3C64XX_SPI_QUIRK_CS_AUTO (1 << 1)
-#define AUTOSUSPEND_TIMEOUT 2000
+#define MAX_SPI_PORTS 12
+#define S3C64XX_SPI_QUIRK_CS_AUTO BIT(1)
+#define AUTOSUSPEND_TIMEOUT 2000
/* Registers and bit-fields */
-#define S3C64XX_SPI_CH_CFG 0x00
-#define S3C64XX_SPI_CLK_CFG 0x04
-#define S3C64XX_SPI_MODE_CFG 0x08
-#define S3C64XX_SPI_CS_REG 0x0C
-#define S3C64XX_SPI_INT_EN 0x10
-#define S3C64XX_SPI_STATUS 0x14
-#define S3C64XX_SPI_TX_DATA 0x18
-#define S3C64XX_SPI_RX_DATA 0x1C
-#define S3C64XX_SPI_PACKET_CNT 0x20
-#define S3C64XX_SPI_PENDING_CLR 0x24
-#define S3C64XX_SPI_SWAP_CFG 0x28
-#define S3C64XX_SPI_FB_CLK 0x2C
-
-#define S3C64XX_SPI_CH_HS_EN (1<<6) /* High Speed Enable */
-#define S3C64XX_SPI_CH_SW_RST (1<<5)
-#define S3C64XX_SPI_CH_SLAVE (1<<4)
-#define S3C64XX_SPI_CPOL_L (1<<3)
-#define S3C64XX_SPI_CPHA_B (1<<2)
-#define S3C64XX_SPI_CH_RXCH_ON (1<<1)
-#define S3C64XX_SPI_CH_TXCH_ON (1<<0)
-
-#define S3C64XX_SPI_CLKSEL_SRCMSK (3<<9)
-#define S3C64XX_SPI_CLKSEL_SRCSHFT 9
-#define S3C64XX_SPI_ENCLK_ENABLE (1<<8)
-#define S3C64XX_SPI_PSR_MASK 0xff
-
-#define S3C64XX_SPI_MODE_CH_TSZ_BYTE (0<<29)
-#define S3C64XX_SPI_MODE_CH_TSZ_HALFWORD (1<<29)
-#define S3C64XX_SPI_MODE_CH_TSZ_WORD (2<<29)
-#define S3C64XX_SPI_MODE_CH_TSZ_MASK (3<<29)
-#define S3C64XX_SPI_MODE_BUS_TSZ_BYTE (0<<17)
-#define S3C64XX_SPI_MODE_BUS_TSZ_HALFWORD (1<<17)
-#define S3C64XX_SPI_MODE_BUS_TSZ_WORD (2<<17)
-#define S3C64XX_SPI_MODE_BUS_TSZ_MASK (3<<17)
+#define S3C64XX_SPI_CH_CFG 0x00
+#define S3C64XX_SPI_CLK_CFG 0x04
+#define S3C64XX_SPI_MODE_CFG 0x08
+#define S3C64XX_SPI_CS_REG 0x0C
+#define S3C64XX_SPI_INT_EN 0x10
+#define S3C64XX_SPI_STATUS 0x14
+#define S3C64XX_SPI_TX_DATA 0x18
+#define S3C64XX_SPI_RX_DATA 0x1C
+#define S3C64XX_SPI_PACKET_CNT 0x20
+#define S3C64XX_SPI_PENDING_CLR 0x24
+#define S3C64XX_SPI_SWAP_CFG 0x28
+#define S3C64XX_SPI_FB_CLK 0x2C
+
+#define S3C64XX_SPI_CH_HS_EN BIT(6) /* High Speed Enable */
+#define S3C64XX_SPI_CH_SW_RST BIT(5)
+#define S3C64XX_SPI_CH_SLAVE BIT(4)
+#define S3C64XX_SPI_CPOL_L BIT(3)
+#define S3C64XX_SPI_CPHA_B BIT(2)
+#define S3C64XX_SPI_CH_RXCH_ON BIT(1)
+#define S3C64XX_SPI_CH_TXCH_ON BIT(0)
+
+#define S3C64XX_SPI_CLKSEL_SRCMSK GENMASK(10, 9)
+#define S3C64XX_SPI_ENCLK_ENABLE BIT(8)
+#define S3C64XX_SPI_PSR_MASK GENMASK(7, 0)
+
+#define S3C64XX_SPI_MODE_CH_TSZ_MASK GENMASK(30, 29)
+#define S3C64XX_SPI_MODE_CH_TSZ_BYTE 0
+#define S3C64XX_SPI_MODE_CH_TSZ_HALFWORD 1
+#define S3C64XX_SPI_MODE_CH_TSZ_WORD 2
+#define S3C64XX_SPI_MAX_TRAILCNT_MASK GENMASK(28, 19)
+#define S3C64XX_SPI_MODE_BUS_TSZ_MASK GENMASK(18, 17)
+#define S3C64XX_SPI_MODE_BUS_TSZ_BYTE 0
+#define S3C64XX_SPI_MODE_BUS_TSZ_HALFWORD 1
+#define S3C64XX_SPI_MODE_BUS_TSZ_WORD 2
#define S3C64XX_SPI_MODE_RX_RDY_LVL GENMASK(16, 11)
-#define S3C64XX_SPI_MODE_RX_RDY_LVL_SHIFT 11
-#define S3C64XX_SPI_MODE_SELF_LOOPBACK (1<<3)
-#define S3C64XX_SPI_MODE_RXDMA_ON (1<<2)
-#define S3C64XX_SPI_MODE_TXDMA_ON (1<<1)
-#define S3C64XX_SPI_MODE_4BURST (1<<0)
-
-#define S3C64XX_SPI_CS_NSC_CNT_2 (2<<4)
-#define S3C64XX_SPI_CS_AUTO (1<<1)
-#define S3C64XX_SPI_CS_SIG_INACT (1<<0)
-
-#define S3C64XX_SPI_INT_TRAILING_EN (1<<6)
-#define S3C64XX_SPI_INT_RX_OVERRUN_EN (1<<5)
-#define S3C64XX_SPI_INT_RX_UNDERRUN_EN (1<<4)
-#define S3C64XX_SPI_INT_TX_OVERRUN_EN (1<<3)
-#define S3C64XX_SPI_INT_TX_UNDERRUN_EN (1<<2)
-#define S3C64XX_SPI_INT_RX_FIFORDY_EN (1<<1)
-#define S3C64XX_SPI_INT_TX_FIFORDY_EN (1<<0)
-
-#define S3C64XX_SPI_ST_RX_OVERRUN_ERR (1<<5)
-#define S3C64XX_SPI_ST_RX_UNDERRUN_ERR (1<<4)
-#define S3C64XX_SPI_ST_TX_OVERRUN_ERR (1<<3)
-#define S3C64XX_SPI_ST_TX_UNDERRUN_ERR (1<<2)
-#define S3C64XX_SPI_ST_RX_FIFORDY (1<<1)
-#define S3C64XX_SPI_ST_TX_FIFORDY (1<<0)
-
-#define S3C64XX_SPI_PACKET_CNT_EN (1<<16)
+#define S3C64XX_SPI_MODE_SELF_LOOPBACK BIT(3)
+#define S3C64XX_SPI_MODE_RXDMA_ON BIT(2)
+#define S3C64XX_SPI_MODE_TXDMA_ON BIT(1)
+#define S3C64XX_SPI_MODE_4BURST BIT(0)
+
+/*
+ * S3C64XX_SPI_CS_NSC_CNT_2 is a value into the NCS_TIME_COUNT field. In newer
+ * datasheets this field is defined as GENMASK(9, 4). We don't know if this mask
+ * applies to all the versions of the IP, thus we can't yet define
+ * S3C64XX_SPI_CS_NSC_CNT_2 as a value and the register field as a mask.
+ */
+#define S3C64XX_SPI_CS_NSC_CNT_2 (2 << 4)
+#define S3C64XX_SPI_CS_AUTO BIT(1)
+#define S3C64XX_SPI_CS_SIG_INACT BIT(0)
+
+#define S3C64XX_SPI_INT_TRAILING_EN BIT(6)
+#define S3C64XX_SPI_INT_RX_OVERRUN_EN BIT(5)
+#define S3C64XX_SPI_INT_RX_UNDERRUN_EN BIT(4)
+#define S3C64XX_SPI_INT_TX_OVERRUN_EN BIT(3)
+#define S3C64XX_SPI_INT_TX_UNDERRUN_EN BIT(2)
+#define S3C64XX_SPI_INT_RX_FIFORDY_EN BIT(1)
+#define S3C64XX_SPI_INT_TX_FIFORDY_EN BIT(0)
+
+#define S3C64XX_SPI_ST_RX_OVERRUN_ERR BIT(5)
+#define S3C64XX_SPI_ST_RX_UNDERRUN_ERR BIT(4)
+#define S3C64XX_SPI_ST_TX_OVERRUN_ERR BIT(3)
+#define S3C64XX_SPI_ST_TX_UNDERRUN_ERR BIT(2)
+#define S3C64XX_SPI_ST_RX_FIFORDY BIT(1)
+#define S3C64XX_SPI_ST_TX_FIFORDY BIT(0)
+
+#define S3C64XX_SPI_PACKET_CNT_EN BIT(16)
#define S3C64XX_SPI_PACKET_CNT_MASK GENMASK(15, 0)
-#define S3C64XX_SPI_PND_TX_UNDERRUN_CLR (1<<4)
-#define S3C64XX_SPI_PND_TX_OVERRUN_CLR (1<<3)
-#define S3C64XX_SPI_PND_RX_UNDERRUN_CLR (1<<2)
-#define S3C64XX_SPI_PND_RX_OVERRUN_CLR (1<<1)
-#define S3C64XX_SPI_PND_TRAILING_CLR (1<<0)
+#define S3C64XX_SPI_PND_TX_UNDERRUN_CLR BIT(4)
+#define S3C64XX_SPI_PND_TX_OVERRUN_CLR BIT(3)
+#define S3C64XX_SPI_PND_RX_UNDERRUN_CLR BIT(2)
+#define S3C64XX_SPI_PND_RX_OVERRUN_CLR BIT(1)
+#define S3C64XX_SPI_PND_TRAILING_CLR BIT(0)
-#define S3C64XX_SPI_SWAP_RX_HALF_WORD (1<<7)
-#define S3C64XX_SPI_SWAP_RX_BYTE (1<<6)
-#define S3C64XX_SPI_SWAP_RX_BIT (1<<5)
-#define S3C64XX_SPI_SWAP_RX_EN (1<<4)
-#define S3C64XX_SPI_SWAP_TX_HALF_WORD (1<<3)
-#define S3C64XX_SPI_SWAP_TX_BYTE (1<<2)
-#define S3C64XX_SPI_SWAP_TX_BIT (1<<1)
-#define S3C64XX_SPI_SWAP_TX_EN (1<<0)
+#define S3C64XX_SPI_SWAP_RX_HALF_WORD BIT(7)
+#define S3C64XX_SPI_SWAP_RX_BYTE BIT(6)
+#define S3C64XX_SPI_SWAP_RX_BIT BIT(5)
+#define S3C64XX_SPI_SWAP_RX_EN BIT(4)
+#define S3C64XX_SPI_SWAP_TX_HALF_WORD BIT(3)
+#define S3C64XX_SPI_SWAP_TX_BYTE BIT(2)
+#define S3C64XX_SPI_SWAP_TX_BIT BIT(1)
+#define S3C64XX_SPI_SWAP_TX_EN BIT(0)
-#define S3C64XX_SPI_FBCLK_MSK (3<<0)
+#define S3C64XX_SPI_FBCLK_MASK GENMASK(1, 0)
#define FIFO_LVL_MASK(i) ((i)->port_conf->fifo_lvl_mask[i->port_id])
#define S3C64XX_SPI_ST_TX_DONE(v, i) (((v) & \
@@ -112,16 +118,13 @@
FIFO_LVL_MASK(i))
#define FIFO_DEPTH(i) ((FIFO_LVL_MASK(i) >> 1) + 1)
-#define S3C64XX_SPI_MAX_TRAILCNT 0x3ff
-#define S3C64XX_SPI_TRAILCNT_OFF 19
-
#define S3C64XX_SPI_POLLING_SIZE 32
#define msecs_to_loops(t) (loops_per_jiffy / 1000 * HZ * t)
#define is_polling(x) (x->cntrlr_info->polling)
-#define RXBUSY (1<<2)
-#define TXBUSY (1<<3)
+#define RXBUSY BIT(2)
+#define TXBUSY BIT(3)
struct s3c64xx_spi_dma_data {
struct dma_chan *ch;
@@ -664,16 +667,22 @@ static int s3c64xx_spi_config(struct s3c64xx_spi_driver_data *sdd)
switch (sdd->cur_bpw) {
case 32:
- val |= S3C64XX_SPI_MODE_BUS_TSZ_WORD;
- val |= S3C64XX_SPI_MODE_CH_TSZ_WORD;
+ val |= FIELD_PREP(S3C64XX_SPI_MODE_BUS_TSZ_MASK,
+ S3C64XX_SPI_MODE_BUS_TSZ_WORD) |
+ FIELD_PREP(S3C64XX_SPI_MODE_CH_TSZ_MASK,
+ S3C64XX_SPI_MODE_CH_TSZ_WORD);
break;
case 16:
- val |= S3C64XX_SPI_MODE_BUS_TSZ_HALFWORD;
- val |= S3C64XX_SPI_MODE_CH_TSZ_HALFWORD;
+ val |= FIELD_PREP(S3C64XX_SPI_MODE_BUS_TSZ_MASK,
+ S3C64XX_SPI_MODE_BUS_TSZ_HALFWORD) |
+ FIELD_PREP(S3C64XX_SPI_MODE_CH_TSZ_MASK,
+ S3C64XX_SPI_MODE_CH_TSZ_HALFWORD);
break;
default:
- val |= S3C64XX_SPI_MODE_BUS_TSZ_BYTE;
- val |= S3C64XX_SPI_MODE_CH_TSZ_BYTE;
+ val |= FIELD_PREP(S3C64XX_SPI_MODE_BUS_TSZ_MASK,
+ S3C64XX_SPI_MODE_BUS_TSZ_BYTE) |
+ FIELD_PREP(S3C64XX_SPI_MODE_CH_TSZ_MASK,
+ S3C64XX_SPI_MODE_CH_TSZ_BYTE);
break;
}
@@ -799,7 +808,7 @@ static int s3c64xx_spi_transfer_one(struct spi_controller *host,
val = readl(sdd->regs + S3C64XX_SPI_MODE_CFG);
val &= ~S3C64XX_SPI_MODE_RX_RDY_LVL;
- val |= (rdy_lv << S3C64XX_SPI_MODE_RX_RDY_LVL_SHIFT);
+ val |= FIELD_PREP(S3C64XX_SPI_MODE_RX_RDY_LVL, rdy_lv);
writel(val, sdd->regs + S3C64XX_SPI_MODE_CFG);
/* Enable FIFO_RDY_EN IRQ */
@@ -1072,8 +1081,8 @@ static void s3c64xx_spi_hwinit(struct s3c64xx_spi_driver_data *sdd)
writel(0, regs + S3C64XX_SPI_INT_EN);
if (!sdd->port_conf->clk_from_cmu)
- writel(sci->src_clk_nr << S3C64XX_SPI_CLKSEL_SRCSHFT,
- regs + S3C64XX_SPI_CLK_CFG);
+ writel(FIELD_PREP(S3C64XX_SPI_CLKSEL_SRCMSK, sci->src_clk_nr),
+ regs + S3C64XX_SPI_CLK_CFG);
writel(0, regs + S3C64XX_SPI_MODE_CFG);
writel(0, regs + S3C64XX_SPI_PACKET_CNT);
@@ -1089,7 +1098,7 @@ static void s3c64xx_spi_hwinit(struct s3c64xx_spi_driver_data *sdd)
val = readl(regs + S3C64XX_SPI_MODE_CFG);
val &= ~S3C64XX_SPI_MODE_4BURST;
- val |= (S3C64XX_SPI_MAX_TRAILCNT << S3C64XX_SPI_TRAILCNT_OFF);
+ val |= S3C64XX_SPI_MAX_TRAILCNT_MASK;
writel(val, regs + S3C64XX_SPI_MODE_CFG);
s3c64xx_flush_fifo(sdd);
--
2.43.0.429.g432eaa2c6b-goog
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next prev parent reply other threads:[~2024-01-26 17:16 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-01-26 17:15 [PATCH v3 00/17] spi: s3c64xx: straightforward cleanup Tudor Ambarus
2024-01-26 17:15 ` Tudor Ambarus
2024-01-26 17:15 ` [PATCH v3 01/17] spi: s3c64xx: explicitly include <linux/io.h> Tudor Ambarus
2024-01-26 17:15 ` Tudor Ambarus
2024-01-26 17:15 ` [PATCH v3 02/17] spi: s3c64xx: explicitly include <linux/bits.h> Tudor Ambarus
2024-01-26 17:15 ` Tudor Ambarus
2024-01-26 17:15 ` [PATCH v3 03/17] spi: s3c64xx: avoid possible negative array index Tudor Ambarus
2024-01-26 17:15 ` Tudor Ambarus
2024-01-26 17:15 ` [PATCH v3 04/17] spi: s3c64xx: fix typo, s/configuartion/configuration Tudor Ambarus
2024-01-26 17:15 ` Tudor Ambarus
2024-01-26 17:15 ` [PATCH v3 05/17] spi: s3c64xx: sort headers alphabetically Tudor Ambarus
2024-01-26 17:15 ` Tudor Ambarus
2024-01-26 17:15 ` [PATCH v3 06/17] spi: s3c64xx: remove unneeded (void *) casts in of_match_table Tudor Ambarus
2024-01-26 17:15 ` Tudor Ambarus
2024-01-26 20:17 ` Sam Protsenko
2024-01-26 20:17 ` Sam Protsenko
2024-01-27 3:41 ` Tudor Ambarus
2024-01-27 3:41 ` Tudor Ambarus
2024-01-26 17:15 ` [PATCH v3 07/17] spi: s3c64xx: remove else after return Tudor Ambarus
2024-01-26 17:15 ` Tudor Ambarus
2024-01-26 17:15 ` [PATCH v3 08/17] spi: s3c64xx: move common code outside if else Tudor Ambarus
2024-01-26 17:15 ` Tudor Ambarus
2024-01-26 17:15 ` [PATCH v3 09/17] spi: s3c64xx: check return code of dmaengine_slave_config() Tudor Ambarus
2024-01-26 17:15 ` Tudor Ambarus
2024-01-26 17:15 ` [PATCH v3 10/17] spi: s3c64xx: propagate the dma_submit_error() error code Tudor Ambarus
2024-01-26 17:15 ` Tudor Ambarus
2024-01-26 17:15 ` [PATCH v3 11/17] spi: s3c64xx: rename prepare_dma() to s3c64xx_prepare_dma() Tudor Ambarus
2024-01-26 17:15 ` Tudor Ambarus
2024-01-26 17:15 ` [PATCH v3 12/17] spi: s3c64xx: return ETIMEDOUT for wait_for_completion_timeout() Tudor Ambarus
2024-01-26 17:15 ` Tudor Ambarus
2024-01-26 20:13 ` Sam Protsenko
2024-01-26 20:13 ` Sam Protsenko
2024-01-27 3:26 ` Tudor Ambarus
2024-01-27 3:26 ` Tudor Ambarus
2024-01-26 17:15 ` [PATCH v3 13/17] spi: s3c64xx: drop blank line between declarations Tudor Ambarus
2024-01-26 17:15 ` Tudor Ambarus
2024-01-26 17:15 ` [PATCH v3 14/17] spi: s3c64xx: downgrade dev_warn to dev_dbg for optional dt props Tudor Ambarus
2024-01-26 17:15 ` Tudor Ambarus
2024-01-26 17:15 ` [PATCH v3 15/17] spi: s3c64xx: remove duplicated definition Tudor Ambarus
2024-01-26 17:15 ` Tudor Ambarus
2024-01-26 20:06 ` Sam Protsenko
2024-01-26 20:06 ` Sam Protsenko
2024-01-26 17:15 ` [PATCH v3 16/17] spi: s3c64xx: drop a superfluous bitwise NOT operation Tudor Ambarus
2024-01-26 17:15 ` Tudor Ambarus
2024-01-26 20:09 ` Sam Protsenko
2024-01-26 20:09 ` Sam Protsenko
2024-01-26 17:15 ` Tudor Ambarus [this message]
2024-01-26 17:15 ` [PATCH v3 17/17] spi: s3c64xx: use bitfield access macros Tudor Ambarus
2024-01-26 20:12 ` Sam Protsenko
2024-01-26 20:12 ` Sam Protsenko
2024-01-27 3:23 ` Tudor Ambarus
2024-01-27 3:23 ` Tudor Ambarus
2024-01-27 3:38 ` Sam Protsenko
2024-01-27 3:38 ` Sam Protsenko
2024-01-27 3:44 ` Tudor Ambarus
2024-01-27 3:44 ` Tudor Ambarus
2024-01-29 16:42 ` Mark Brown
2024-01-29 16:42 ` Mark Brown
2024-01-29 17:59 ` Tudor Ambarus
2024-01-29 17:59 ` Tudor Ambarus
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