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authorPiotr Wilczek <p.wilczek@samsung.com>2012-10-19 05:34:03 +0000
committerMinkyu Kang <mk7.kang@samsung.com>2012-11-15 21:08:19 +0900
commitff0fedd58529e50e972d6b983c52c54a062f8c75 (patch)
tree33204f25e6428e6d220a4ecd03888caebddb90f9 /board/samsung
parenta6f173073b04f193e83bccf39569e56233c9edf0 (diff)
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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')
-rw-r--r--board/samsung/universal_c210/universal.c87
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;
+}