This patch use software spi on Samsung Universal C210 board.
Signed-off-by: Piotr Wilczek p.wilczek@samsung.com Signed-off-by: Kyungmin Park kyungmin.park@samsung.com CC: Minkyu Kang mk7.kang@samsung.com --- New path added in v5.
board/samsung/universal_c210/universal.c | 87 +++++++++++++++++++++++------ include/configs/s5pc210_universal.h | 21 +++++++ 2 files changed, 90 insertions(+), 18 deletions(-)
diff --git a/board/samsung/universal_c210/universal.c b/board/samsung/universal_c210/universal.c index ded97ca..4c1163e 100644 --- a/board/samsung/universal_c210/universal.c +++ b/board/samsung/universal_c210/universal.c @@ -23,7 +23,9 @@ */
#include <common.h> +#include <spi.h> #include <asm/io.h> +#include <asm/gpio.h> #include <asm/arch/adc.h> #include <asm/arch/gpio.h> #include <asm/arch/mmc.h> @@ -52,24 +54,6 @@ static int get_hwrev(void)
static void check_hw_revision(void);
-int board_init(void) -{ - gpio1 = (struct exynos4_gpio_part1 *) EXYNOS4_GPIO_PART1_BASE; - gpio2 = (struct exynos4_gpio_part2 *) EXYNOS4_GPIO_PART2_BASE; - - gd->bd->bi_arch_number = MACH_TYPE_UNIVERSAL_C210; - gd->bd->bi_boot_params = PHYS_SDRAM_1 + 0x100; - -#if defined(CONFIG_PMIC) - pmic_init(); -#endif - - check_hw_revision(); - printf("HW Revision:\t0x%x\n", board_rev); - - return 0; -} - int dram_init(void) { gd->ram_size = get_ram_size((long *)PHYS_SDRAM_1, PHYS_SDRAM_1_SIZE) + @@ -284,3 +268,70 @@ int board_early_init_f(void)
return 0; } + +#ifdef CONFIG_SOFT_SPI +static void soft_spi_init(void) +{ + gpio_direction_output(CONFIG_SOFT_SPI_GPIO_SCLK, + CONFIG_SOFT_SPI_MODE & SPI_CPOL); + gpio_direction_output(CONFIG_SOFT_SPI_GPIO_MOSI, 1); + gpio_direction_input(CONFIG_SOFT_SPI_GPIO_MISO); + gpio_direction_output(CONFIG_SOFT_SPI_GPIO_CS, + !(CONFIG_SOFT_SPI_MODE & SPI_CS_HIGH)); +} + +void spi_cs_activate(struct spi_slave *slave) +{ + gpio_set_value(CONFIG_SOFT_SPI_GPIO_CS, + !(CONFIG_SOFT_SPI_MODE & SPI_CS_HIGH)); + SPI_SCL(1); + gpio_set_value(CONFIG_SOFT_SPI_GPIO_CS, + CONFIG_SOFT_SPI_MODE & SPI_CS_HIGH); +} + +void spi_cs_deactivate(struct spi_slave *slave) +{ + gpio_set_value(CONFIG_SOFT_SPI_GPIO_CS, + !(CONFIG_SOFT_SPI_MODE & SPI_CS_HIGH)); +} + +int spi_cs_is_valid(unsigned int bus, unsigned int cs) +{ + return bus == 0 && cs == 0; +} + +void universal_spi_scl(int bit) +{ + gpio_set_value(CONFIG_SOFT_SPI_GPIO_SCLK, bit); +} + +void universal_spi_sda(int bit) +{ + gpio_set_value(CONFIG_SOFT_SPI_GPIO_MOSI, bit); +} + +int universal_spi_read(void) +{ + return gpio_get_value(CONFIG_SOFT_SPI_GPIO_MISO); +} +#endif + +int board_init(void) +{ + gpio1 = (struct exynos4_gpio_part1 *) EXYNOS4_GPIO_PART1_BASE; + gpio2 = (struct exynos4_gpio_part2 *) EXYNOS4_GPIO_PART2_BASE; + + gd->bd->bi_arch_number = MACH_TYPE_UNIVERSAL_C210; + gd->bd->bi_boot_params = PHYS_SDRAM_1 + 0x100; + +#if defined(CONFIG_PMIC) + pmic_init(); +#endif +#ifdef CONFIG_SOFT_SPI + soft_spi_init(); +#endif + check_hw_revision(); + printf("HW Revision:\t0x%x\n", board_rev); + + return 0; +} diff --git a/include/configs/s5pc210_universal.h b/include/configs/s5pc210_universal.h index 07849fb..54ee8c4 100644 --- a/include/configs/s5pc210_universal.h +++ b/include/configs/s5pc210_universal.h @@ -263,4 +263,25 @@ #define CONFIG_USB_GADGET_S3C_UDC_OTG #define CONFIG_USB_GADGET_DUALSPEED
+/* + * SPI Settings + */ +#define CONFIG_SOFT_SPI +#define CONFIG_SOFT_SPI_MODE SPI_MODE_3 +#define CONFIG_SOFT_SPI_GPIO_SCLK exynos4_gpio_part2_get_nr(y3, 1) +#define CONFIG_SOFT_SPI_GPIO_MOSI exynos4_gpio_part2_get_nr(y3, 3) +#define CONFIG_SOFT_SPI_GPIO_MISO exynos4_gpio_part2_get_nr(y3, 0) +#define CONFIG_SOFT_SPI_GPIO_CS exynos4_gpio_part2_get_nr(y4, 3) + +#define SPI_DELAY udelay(1) +#undef SPI_INIT +#define SPI_SCL(bit) universal_spi_scl(bit) +#define SPI_SDA(bit) universal_spi_sda(bit) +#define SPI_READ universal_spi_read() +#ifndef __ASSEMBLY__ +void universal_spi_scl(int bit); +void universal_spi_sda(int bit); +int universal_spi_read(void); +#endif + #endif /* __CONFIG_H */