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exynos4: universal_C210: use software SPI

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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>
This commit is contained in:
Piotr Wilczek 2012-10-19 05:34:03 +00:00 committed by Minkyu Kang
parent a6f173073b
commit ff0fedd585
2 changed files with 90 additions and 18 deletions
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87
board/samsung/universal_c210/universal.c
View File

@ -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;
}

21
include/configs/s5pc210_universal.h
View File

@ -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 */