Signed-off-by: Piotr Wojtaszczyk piotr.wojtaszczyk@timesys.com ---
drivers/gpio/Kconfig | 3 + drivers/gpio/Makefile | 2 +- drivers/gpio/mcp230xx_gpio.c | 144 ++++++++++++++++++++++++++++++++++- 3 files changed, 144 insertions(+), 5 deletions(-)
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index 2df3dc42d0..a7fb1eb3f4 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -256,6 +256,9 @@ config MCP230XX_GPIO - MCP23008 - MCP23017 - MCP23018 + - MCP23S08 + - MCP23S17 + - MCP23S18
config MSCC_SGPIO bool "Microsemi Serial GPIO driver" diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile index da3da5da2b..90711702a6 100644 --- a/drivers/gpio/Makefile +++ b/drivers/gpio/Makefile @@ -23,7 +23,7 @@ obj-$(CONFIG_INTEL_ICH6_GPIO) += intel_ich6_gpio.o obj-$(CONFIG_INTEL_BROADWELL_GPIO) += intel_broadwell_gpio.o obj-$(CONFIG_IPROC_GPIO) += iproc_gpio.o obj-$(CONFIG_KIRKWOOD_GPIO) += kw_gpio.o -obj-$(CONFIG_MCP230XX_GPIO) += mcp230xx_gpio.o +obj-$(CONFIG_$(SPL_TPL_)MCP230XX_GPIO) += mcp230xx_gpio.o obj-$(CONFIG_MXC_GPIO) += mxc_gpio.o obj-$(CONFIG_MXS_GPIO) += mxs_gpio.o obj-$(CONFIG_NPCM_GPIO) += npcm_gpio.o diff --git a/drivers/gpio/mcp230xx_gpio.c b/drivers/gpio/mcp230xx_gpio.c index 9f02fd42b3..df99fde566 100644 --- a/drivers/gpio/mcp230xx_gpio.c +++ b/drivers/gpio/mcp230xx_gpio.c @@ -11,6 +11,7 @@ #include <errno.h> #include <dm.h> #include <i2c.h> +#include <spi.h> #include <asm/gpio.h> #include <dm/device_compat.h> #include <dt-bindings/gpio/gpio.h> @@ -20,6 +21,13 @@ enum mcp230xx_type { MCP23008, MCP23017, MCP23018, + MCP23S08, + MCP23S17, + MCP23S18, +}; + +struct mcp230xx_info { + uint dev_addr; };
#define MCP230XX_IODIR 0x00 @@ -29,29 +37,136 @@ enum mcp230xx_type {
#define BANKSIZE 8
+#define MCP230XX_ADDR 0x20 + +static int mcp230xx_read_spi(struct udevice *dev, uint reg_addr) +{ + struct mcp230xx_info *info = dev_get_plat(dev); + uint dev_addr, value = 0; + int ret; + + /* set R/W bit for reading */ + dev_addr = (info->dev_addr << 1) | 1; + + ret = dm_spi_claim_bus(dev); + if (ret) + return ret; + + ret = dm_spi_xfer(dev, 0, NULL, NULL, SPI_XFER_BEGIN); + if (ret < 0) + goto fail; + udelay(1); + + ret = dm_spi_xfer(dev, 8, &dev_addr, NULL, 0); + if (ret < 0) + goto fail; + + ret = dm_spi_xfer(dev, 8, ®_addr, NULL, 0); + if (ret < 0) + goto fail; + + ret = dm_spi_xfer(dev, 8, NULL, &value, 0); + +fail: + dm_spi_xfer(dev, 0, NULL, NULL, SPI_XFER_END); + dm_spi_release_bus(dev); + if (ret < 0) + return ret; + return value; +} + static int mcp230xx_read(struct udevice *dev, uint reg, uint offset) { struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev); int bank = offset / BANKSIZE; int mask = 1 << (offset % BANKSIZE); int shift = (uc_priv->gpio_count / BANKSIZE) - 1; - int ret; + int reg_addr = (reg << shift) | bank; + int ret = 0; + + switch (dev_get_driver_data(dev)) { + case MCP23008: + case MCP23017: + case MCP23018: + ret = dm_i2c_reg_read(dev, reg_addr); + break; + case MCP23S08: + case MCP23S17: + case MCP23S18: + ret = mcp230xx_read_spi(dev, reg_addr); + break; + default: + return -ENODEV; + }
- ret = dm_i2c_reg_read(dev, (reg << shift) | bank); if (ret < 0) return ret;
return !!(ret & mask); }
+static int mcp230xx_clrset_spi(struct udevice *dev, uint reg_addr, uint clr, uint set) +{ + struct mcp230xx_info *info = dev_get_plat(dev); + int dev_addr, value; + int ret; + + /* R/W bit = 0 for writing */ + dev_addr = (info->dev_addr << 1); + + ret = mcp230xx_read_spi(dev, reg_addr); + if (ret < 0) + return ret; + + value = ret; + value &= ~clr; + value |= set; + + ret = dm_spi_claim_bus(dev); + if (ret) + return ret; + + ret = dm_spi_xfer(dev, 0, NULL, NULL, SPI_XFER_BEGIN); + if (ret < 0) + goto fail; + udelay(1); + + ret = dm_spi_xfer(dev, 8, &dev_addr, NULL, 0); + if (ret < 0) + goto fail; + + ret = dm_spi_xfer(dev, 8, ®_addr, NULL, 0); + if (ret < 0) + goto fail; + + ret = dm_spi_xfer(dev, 8, &value, NULL, 0); + +fail: + dm_spi_xfer(dev, 0, NULL, NULL, SPI_XFER_END); + dm_spi_release_bus(dev); + return ret; +} + static int mcp230xx_write(struct udevice *dev, uint reg, uint offset, bool val) { struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev); int bank = offset / BANKSIZE; int mask = 1 << (offset % BANKSIZE); int shift = (uc_priv->gpio_count / BANKSIZE) - 1; + int reg_addr = (reg << shift) | bank;
- return dm_i2c_reg_clrset(dev, (reg << shift) | bank, mask, val ? mask : 0); + switch (dev_get_driver_data(dev)) { + case MCP23008: + case MCP23017: + case MCP23018: + return dm_i2c_reg_clrset(dev, reg_addr, mask, val ? mask : 0); + case MCP23S08: + case MCP23S17: + case MCP23S18: + return mcp230xx_clrset_spi(dev, reg_addr, mask, val ? mask : 0); + default: + return -ENODEV; + } }
static int mcp230xx_get_value(struct udevice *dev, uint offset) @@ -181,22 +296,37 @@ static const struct dm_gpio_ops mcp230xx_ops = { static int mcp230xx_probe(struct udevice *dev) { struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev); - char name[32], label[8], *str; + struct mcp230xx_info *info = dev_get_plat(dev); + char name[32], label[32], *str; int addr, gpio_count, size; const u8 *tmp;
switch (dev_get_driver_data(dev)) { case MCP23008: + case MCP23S08: gpio_count = 8; break; case MCP23017: case MCP23018: + case MCP23S17: + case MCP23S18: gpio_count = 16; break; default: return -ENODEV; }
+ switch (dev_get_driver_data(dev)) { + case MCP23S08: + case MCP23S17: + case MCP23S18: + info->dev_addr = dev_read_u32_default(dev, "addr", MCP230XX_ADDR); + break; + default: + info->dev_addr = 0; + break; + } + addr = dev_read_addr(dev); tmp = dev_read_prop(dev, "label", &size); if (tmp) { @@ -220,9 +350,14 @@ static int mcp230xx_probe(struct udevice *dev) }
static const struct udevice_id mcp230xx_ids[] = { + /* i2c interface */ { .compatible = "microchip,mcp23008", .data = MCP23008, }, { .compatible = "microchip,mcp23017", .data = MCP23017, }, { .compatible = "microchip,mcp23018", .data = MCP23018, }, + /* spi interface */ + { .compatible = "microchip,mcp23s08", .data = MCP23S08, }, + { .compatible = "microchip,mcp23s17", .data = MCP23S17, }, + { .compatible = "microchip,mcp23s18", .data = MCP23S18, }, { } };
@@ -231,5 +366,6 @@ U_BOOT_DRIVER(mcp230xx) = { .id = UCLASS_GPIO, .ops = &mcp230xx_ops, .probe = mcp230xx_probe, + .plat_auto = sizeof(struct mcp230xx_info), .of_match = mcp230xx_ids, };