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author | Piotr Wilczek <p.wilczek@samsung.com> | 2012-10-19 05:34:03 +0000 |
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committer | Minkyu Kang <mk7.kang@samsung.com> | 2012-11-15 21:08:19 +0900 |
commit | ff0fedd58529e50e972d6b983c52c54a062f8c75 (patch) | |
tree | 33204f25e6428e6d220a4ecd03888caebddb90f9 /board/samsung/universal_c210 | |
parent | a6f173073b04f193e83bccf39569e56233c9edf0 (diff) | |
download | u-boot-imx-ff0fedd58529e50e972d6b983c52c54a062f8c75.zip u-boot-imx-ff0fedd58529e50e972d6b983c52c54a062f8c75.tar.gz u-boot-imx-ff0fedd58529e50e972d6b983c52c54a062f8c75.tar.bz2 |
exynos4: universal_C210: use software SPI
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>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
Diffstat (limited to 'board/samsung/universal_c210')
-rw-r--r-- | board/samsung/universal_c210/universal.c | 87 |
1 files changed, 69 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; +} |