Move all register definitions and structs into the driver. This allows
us dropping the platform_data struct and drop any arch specific
includes. Make use of different device names to identify the version of
the block we have.
Since we now have full control over the message width, we can drop the
size check, which was broken anyway, since it never set ret to any error
code.
Also since we now have no arch depedendent resources, we can now allow
compiling it for any arch, hidden behind COMPILE_TEST.
Signed-off-by: Jonas Gorski <jogo@xxxxxxxxxxx>
---
v1 -> v2
* Make use of device name for identification.
* Remove register helpers from arch/ code as well.
arch/mips/bcm63xx/dev-spi.c | 34 +---
.../include/asm/mach-bcm63xx/bcm63xx_dev_spi.h | 42 -----
drivers/spi/Kconfig | 2 +-
drivers/spi/spi-bcm63xx.c | 197 ++++++++++++++++++---
4 files changed, 181 insertions(+), 94 deletions(-)
diff --git a/arch/mips/bcm63xx/dev-spi.c b/arch/mips/bcm63xx/dev-spi.c
index b212256..2323854 100644
--- a/arch/mips/bcm63xx/dev-spi.c
+++ b/arch/mips/bcm63xx/dev-spi.c
@@ -18,29 +18,6 @@
#include <bcm63xx_dev_spi.h>
#include <bcm63xx_regs.h>
-/*
- * register offsets
- */
-static const unsigned long bcm6348_regs_spi[] = {
- __GEN_SPI_REGS_TABLE(6348)
-};
-
-static const unsigned long bcm6358_regs_spi[] = {
- __GEN_SPI_REGS_TABLE(6358)
-};
-
-const unsigned long *bcm63xx_regs_spi;
-EXPORT_SYMBOL(bcm63xx_regs_spi);
-
-static __init void bcm63xx_spi_regs_init(void)
-{
- if (BCMCPU_IS_6338() || BCMCPU_IS_6348())
- bcm63xx_regs_spi = bcm6348_regs_spi;
- if (BCMCPU_IS_3368() || BCMCPU_IS_6358() ||
- BCMCPU_IS_6362() || BCMCPU_IS_6368())
- bcm63xx_regs_spi = bcm6358_regs_spi;
-}
-
static struct resource spi_resources[] = {
{
.start = -1, /* filled at runtime */
@@ -54,7 +31,6 @@ static struct resource spi_resources[] = {
};
static struct platform_device bcm63xx_spi_device = {
- .name = "bcm63xx-spi",
.id = -1,
.num_resources = ARRAY_SIZE(spi_resources),
.resource = spi_resources,
@@ -69,14 +45,16 @@ int __init bcm63xx_spi_register(void)
spi_resources[0].end = spi_resources[0].start;
spi_resources[1].start = bcm63xx_get_irq_number(IRQ_SPI);
- if (BCMCPU_IS_6338() || BCMCPU_IS_6348())
+ if (BCMCPU_IS_6338() || BCMCPU_IS_6348()) {
+ bcm63xx_spi_device.name = "bcm6348-spi",
spi_resources[0].end += BCM_6348_RSET_SPI_SIZE - 1;
+ }
if (BCMCPU_IS_3368() || BCMCPU_IS_6358() || BCMCPU_IS_6362() ||
- BCMCPU_IS_6368())
+ BCMCPU_IS_6368()) {
+ bcm63xx_spi_device.name = "bcm6358-spi",
spi_resources[0].end += BCM_6358_RSET_SPI_SIZE - 1;
-
- bcm63xx_spi_regs_init();
+ }
return platform_device_register(&bcm63xx_spi_device);
}
diff --git a/arch/mips/include/asm/mach-bcm63xx/bcm63xx_dev_spi.h b/arch/mips/include/asm/mach-bcm63xx/bcm63xx_dev_spi.h
index 1d121fd..dd29954 100644
--- a/arch/mips/include/asm/mach-bcm63xx/bcm63xx_dev_spi.h
+++ b/arch/mips/include/asm/mach-bcm63xx/bcm63xx_dev_spi.h
@@ -7,46 +7,4 @@
int __init bcm63xx_spi_register(void);
-enum bcm63xx_regs_spi {
- SPI_CMD,
- SPI_INT_STATUS,
- SPI_INT_MASK_ST,
- SPI_INT_MASK,
- SPI_ST,
- SPI_CLK_CFG,
- SPI_FILL_BYTE,
- SPI_MSG_TAIL,
- SPI_RX_TAIL,
- SPI_MSG_CTL,
- SPI_MSG_DATA,
- SPI_RX_DATA,
- SPI_MSG_TYPE_SHIFT,
- SPI_MSG_CTL_WIDTH,
- SPI_MSG_DATA_SIZE,
-};
-
-#define __GEN_SPI_REGS_TABLE(__cpu) \
- [SPI_CMD] = SPI_## __cpu ##_CMD, \
- [SPI_INT_STATUS] = SPI_## __cpu ##_INT_STATUS, \
- [SPI_INT_MASK_ST] = SPI_## __cpu ##_INT_MASK_ST, \
- [SPI_INT_MASK] = SPI_## __cpu ##_INT_MASK, \
- [SPI_ST] = SPI_## __cpu ##_ST, \
- [SPI_CLK_CFG] = SPI_## __cpu ##_CLK_CFG, \
- [SPI_FILL_BYTE] = SPI_## __cpu ##_FILL_BYTE, \
- [SPI_MSG_TAIL] = SPI_## __cpu ##_MSG_TAIL, \
- [SPI_RX_TAIL] = SPI_## __cpu ##_RX_TAIL, \
- [SPI_MSG_CTL] = SPI_## __cpu ##_MSG_CTL, \
- [SPI_MSG_DATA] = SPI_## __cpu ##_MSG_DATA, \
- [SPI_RX_DATA] = SPI_## __cpu ##_RX_DATA, \
- [SPI_MSG_TYPE_SHIFT] = SPI_## __cpu ##_MSG_TYPE_SHIFT, \
- [SPI_MSG_CTL_WIDTH] = SPI_## __cpu ##_MSG_CTL_WIDTH, \
- [SPI_MSG_DATA_SIZE] = SPI_## __cpu ##_MSG_DATA_SIZE,
-
-static inline unsigned long bcm63xx_spireg(enum bcm63xx_regs_spi reg)
-{
- extern const unsigned long *bcm63xx_regs_spi;
-
- return bcm63xx_regs_spi[reg];
-}
-
#endif /* BCM63XX_DEV_SPI_H */
diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index 4887f31..5c1db98 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -125,7 +125,7 @@ config SPI_BCM53XX
config SPI_BCM63XX
tristate "Broadcom BCM63xx SPI controller"
- depends on BCM63XX
+ depends on BCM63XX || COMPILE_TEST
help
Enable support for the SPI controller on the Broadcom BCM63xx SoCs.
diff --git a/drivers/spi/spi-bcm63xx.c b/drivers/spi/spi-bcm63xx.c
index b3da044..06858e0 100644
--- a/drivers/spi/spi-bcm63xx.c
+++ b/drivers/spi/spi-bcm63xx.c
@@ -27,7 +27,111 @@
#include <linux/err.h>
#include <linux/pm_runtime.h>
-#include <bcm63xx_dev_spi.h>
+/* BCM 6338/6348 SPI core */
+#define SPI_6348_RSET_SIZE 64
+#define SPI_6348_CMD 0x00 /* 16-bits register */
+#define SPI_6348_INT_STATUS 0x02
+#define SPI_6348_INT_MASK_ST 0x03
+#define SPI_6348_INT_MASK 0x04
+#define SPI_6348_ST 0x05
+#define SPI_6348_CLK_CFG 0x06
+#define SPI_6348_FILL_BYTE 0x07
+#define SPI_6348_MSG_TAIL 0x09
+#define SPI_6348_RX_TAIL 0x0b
+#define SPI_6348_MSG_CTL 0x40 /* 8-bits register */
+#define SPI_6348_MSG_CTL_WIDTH 8
+#define SPI_6348_MSG_DATA 0x41
+#define SPI_6348_MSG_DATA_SIZE 0x3f
+#define SPI_6348_RX_DATA 0x80
+#define SPI_6348_RX_DATA_SIZE 0x3f
+
+/* BCM 3368/6358/6262/6368 SPI core */
+#define SPI_6358_RSET_SIZE 1804
+#define SPI_6358_MSG_CTL 0x00 /* 16-bits register */
+#define SPI_6358_MSG_CTL_WIDTH 16
+#define SPI_6358_MSG_DATA 0x02
+#define SPI_6358_MSG_DATA_SIZE 0x21e
+#define SPI_6358_RX_DATA 0x400
+#define SPI_6358_RX_DATA_SIZE 0x220
+#define SPI_6358_CMD 0x700 /* 16-bits register */
+#define SPI_6358_INT_STATUS 0x702
+#define SPI_6358_INT_MASK_ST 0x703
+#define SPI_6358_INT_MASK 0x704
+#define SPI_6358_ST 0x705
+#define SPI_6358_CLK_CFG 0x706
+#define SPI_6358_FILL_BYTE 0x707
+#define SPI_6358_MSG_TAIL 0x709
+#define SPI_6358_RX_TAIL 0x70B
+
+/* Shared SPI definitions */
+
+/* Message configuration */
+#define SPI_FD_RW 0x00
+#define SPI_HD_W 0x01
+#define SPI_HD_R 0x02
+#define SPI_BYTE_CNT_SHIFT 0
+#define SPI_6348_MSG_TYPE_SHIFT 6
+#define SPI_6358_MSG_TYPE_SHIFT 14
+
+/* Command */
+#define SPI_CMD_NOOP 0x00
+#define SPI_CMD_SOFT_RESET 0x01
+#define SPI_CMD_HARD_RESET 0x02
+#define SPI_CMD_START_IMMEDIATE 0x03
+#define SPI_CMD_COMMAND_SHIFT 0
+#define SPI_CMD_COMMAND_MASK 0x000f
+#define SPI_CMD_DEVICE_ID_SHIFT 4
+#define SPI_CMD_PREPEND_BYTE_CNT_SHIFT 8
+#define SPI_CMD_ONE_BYTE_SHIFT 11
+#define SPI_CMD_ONE_WIRE_SHIFT 12
+#define SPI_DEV_ID_0 0
+#define SPI_DEV_ID_1 1
+#define SPI_DEV_ID_2 2
+#define SPI_DEV_ID_3 3
+
+/* Interrupt mask */
+#define SPI_INTR_CMD_DONE 0x01
+#define SPI_INTR_RX_OVERFLOW 0x02
+#define SPI_INTR_TX_UNDERFLOW 0x04
+#define SPI_INTR_TX_OVERFLOW 0x08
+#define SPI_INTR_RX_UNDERFLOW 0x10
+#define SPI_INTR_CLEAR_ALL 0x1f
+
+/* Status */
+#define SPI_RX_EMPTY 0x02
+#define SPI_CMD_BUSY 0x04
+#define SPI_SERIAL_BUSY 0x08
+
+/* Clock configuration */
+#define SPI_CLK_20MHZ 0x00
+#define SPI_CLK_0_391MHZ 0x01
+#define SPI_CLK_0_781MHZ 0x02 /* default */
+#define SPI_CLK_1_563MHZ 0x03
+#define SPI_CLK_3_125MHZ 0x04
+#define SPI_CLK_6_250MHZ 0x05
+#define SPI_CLK_12_50MHZ 0x06
+#define SPI_CLK_MASK 0x07
+#define SPI_SSOFFTIME_MASK 0x38
+#define SPI_SSOFFTIME_SHIFT 3
+#define SPI_BYTE_SWAP 0x80
+
+enum bcm63xx_regs_spi {
+ SPI_CMD,
+ SPI_INT_STATUS,
+ SPI_INT_MASK_ST,
+ SPI_INT_MASK,
+ SPI_ST,
+ SPI_CLK_CFG,
+ SPI_FILL_BYTE,
+ SPI_MSG_TAIL,
+ SPI_RX_TAIL,
+ SPI_MSG_CTL,
+ SPI_MSG_DATA,
+ SPI_RX_DATA,
+ SPI_MSG_TYPE_SHIFT,
+ SPI_MSG_CTL_WIDTH,
+ SPI_MSG_DATA_SIZE,
+};
#define BCM63XX_SPI_MAX_PREPEND 15
@@ -41,6 +145,7 @@ struct bcm63xx_spi {
int irq;
/* Platform data */
+ const unsigned long *reg_offsets;
unsigned fifo_size;
unsigned int msg_type_shift;
unsigned int msg_ctl_width;
@@ -54,34 +159,34 @@ struct bcm63xx_spi {
};
static inline u8 bcm_spi_readb(struct bcm63xx_spi *bs,
- unsigned int offset)
+ unsigned int offset)
{
- return readb(bs->regs + bcm63xx_spireg(offset));
+ return readb(bs->regs + bs->reg_offsets[offset]);
}
static inline u16 bcm_spi_readw(struct bcm63xx_spi *bs,
unsigned int offset)
{
#ifdef CONFIG_CPU_BIG_ENDIAN
- return ioread16be(bs->regs + bcm63xx_spireg(offset));
+ return ioread16be(bs->regs + bs->reg_offsets[offset]);
#else
- return readw(bs->regs + bcm63xx_spireg(offset));
+ return readw(bs->regs + bs->reg_offsets[offset]);
#endif
}
static inline void bcm_spi_writeb(struct bcm63xx_spi *bs,
u8 value, unsigned int offset)
{
- writeb(value, bs->regs + bcm63xx_spireg(offset));
+ writeb(value, bs->regs + bs->reg_offsets[offset]);
}
static inline void bcm_spi_writew(struct bcm63xx_spi *bs,
u16 value, unsigned int offset)
{
#ifdef CONFIG_CPU_BIG_ENDIAN
- iowrite16be(value, bs->regs + bcm63xx_spireg(offset));
+ iowrite16be(value, bs->regs + bs->reg_offsets[offset]);
#else
- writew(value, bs->regs + bcm63xx_spireg(offset));
+ writew(value, bs->regs + bs->reg_offsets[offset]);
#endif
}
@@ -324,10 +429,59 @@ static irqreturn_t bcm63xx_spi_interrupt(int irq, void *dev_id)
return IRQ_HANDLED;
}
+static const unsigned long bcm6348_spi_reg_offsets[] = {
+ [SPI_CMD] = SPI_6348_CMD,
+ [SPI_INT_STATUS] = SPI_6348_INT_STATUS,
+ [SPI_INT_MASK_ST] = SPI_6348_INT_MASK_ST,
+ [SPI_INT_MASK] = SPI_6348_INT_MASK,
+ [SPI_ST] = SPI_6348_ST,
+ [SPI_CLK_CFG] = SPI_6348_CLK_CFG,
+ [SPI_FILL_BYTE] = SPI_6348_FILL_BYTE,
+ [SPI_MSG_TAIL] = SPI_6348_MSG_TAIL,
+ [SPI_RX_TAIL] = SPI_6348_RX_TAIL,
+ [SPI_MSG_CTL] = SPI_6348_MSG_CTL,
+ [SPI_MSG_DATA] = SPI_6348_MSG_DATA,
+ [SPI_RX_DATA] = SPI_6348_RX_DATA,
+ [SPI_MSG_TYPE_SHIFT] = SPI_6348_MSG_TYPE_SHIFT,
+ [SPI_MSG_CTL_WIDTH] = SPI_6348_MSG_CTL_WIDTH,
+ [SPI_MSG_DATA_SIZE] = SPI_6348_MSG_DATA_SIZE,
+};
+
+static const unsigned long bcm6358_spi_reg_offsets[] = {
+ [SPI_CMD] = SPI_6358_CMD,
+ [SPI_INT_STATUS] = SPI_6358_INT_STATUS,
+ [SPI_INT_MASK_ST] = SPI_6358_INT_MASK_ST,
+ [SPI_INT_MASK] = SPI_6358_INT_MASK,
+ [SPI_ST] = SPI_6358_ST,
+ [SPI_CLK_CFG] = SPI_6358_CLK_CFG,
+ [SPI_FILL_BYTE] = SPI_6358_FILL_BYTE,
+ [SPI_MSG_TAIL] = SPI_6358_MSG_TAIL,
+ [SPI_RX_TAIL] = SPI_6358_RX_TAIL,
+ [SPI_MSG_CTL] = SPI_6358_MSG_CTL,
+ [SPI_MSG_DATA] = SPI_6358_MSG_DATA,
+ [SPI_RX_DATA] = SPI_6358_RX_DATA,
+ [SPI_MSG_TYPE_SHIFT] = SPI_6358_MSG_TYPE_SHIFT,
+ [SPI_MSG_CTL_WIDTH] = SPI_6358_MSG_CTL_WIDTH,
+ [SPI_MSG_DATA_SIZE] = SPI_6358_MSG_DATA_SIZE,
+};
+
+static const struct platform_device_id bcm63xx_spi_dev_match[] = {
+ {
+ .name = "bcm6348-spi",
+ .driver_data = (unsigned long)bcm6348_spi_reg_offsets,
+ },
+ {
+ .name = "bcm6358-spi",
+ .driver_data = (unsigned long)bcm6358_spi_reg_offsets,
+ },
+ {
+ },
+};
static int bcm63xx_spi_probe(struct platform_device *pdev)
{
struct resource *r;
+ const unsigned long *bcm63xx_spireg;
struct device *dev = &pdev->dev;
int irq;
struct spi_master *master;
@@ -335,6 +489,11 @@ static int bcm63xx_spi_probe(struct platform_device *pdev)
struct bcm63xx_spi *bs;
int ret;
+ if (!pdev->id_entry->driver_data)
+ return -EINVAL;
+
+ bcm63xx_spireg = (const unsigned long *)pdev->id_entry->driver_data;
+
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
dev_err(dev, "no irq\n");
@@ -368,7 +527,8 @@ static int bcm63xx_spi_probe(struct platform_device *pdev)
bs->irq = irq;
bs->clk = clk;
- bs->fifo_size = bcm63xx_spireg(SPI_MSG_DATA_SIZE);
+ bs->reg_offsets = bcm63xx_spireg;
+ bs->fifo_size = bs->reg_offsets[SPI_MSG_DATA_SIZE];
ret = devm_request_irq(&pdev->dev, irq, bcm63xx_spi_interrupt, 0,
pdev->name, master);
@@ -383,20 +543,10 @@ static int bcm63xx_spi_probe(struct platform_device *pdev)
master->mode_bits = MODEBITS;
master->bits_per_word_mask = SPI_BPW_MASK(8);
master->auto_runtime_pm = true;
- bs->msg_type_shift = bcm63xx_spireg(SPI_MSG_TYPE_SHIFT);
- bs->msg_ctl_width = bcm63xx_spireg(SPI_MSG_CTL_WIDTH);
- bs->tx_io = (u8 *)(bs->regs + bcm63xx_spireg(SPI_MSG_DATA));
- bs->rx_io = (const u8 *)(bs->regs + bcm63xx_spireg(SPI_RX_DATA));
-
- switch (bs->msg_ctl_width) {
- case 8:
- case 16:
- break;
- default:
- dev_err(dev, "unsupported MSG_CTL width: %d\n",
- bs->msg_ctl_width);
- goto out_err;
- }
+ bs->msg_type_shift = bs->reg_offsets[SPI_MSG_TYPE_SHIFT];
+ bs->msg_ctl_width = bs->reg_offsets[SPI_MSG_CTL_WIDTH];
+ bs->tx_io = (u8 *)(bs->regs + bs->reg_offsets[SPI_MSG_DATA]);
+ bs->rx_io = (const u8 *)(bs->regs + bs->reg_offsets[SPI_RX_DATA]);
/* Initialize hardware */
ret = clk_prepare_enable(bs->clk);
@@ -476,6 +626,7 @@ static struct platform_driver bcm63xx_spi_driver = {
.name = "bcm63xx-spi",
.pm = &bcm63xx_spi_pm_ops,
},
+ .id_table = bcm63xx_spi_dev_match,
.probe = bcm63xx_spi_probe,
.remove = bcm63xx_spi_remove,
};
--
2.1.4
