diff options
| author | Mengqi Zhang <Mengqi.Zhang@mediatek.com> | 2019-04-24 10:14:52 +0800 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2019-06-21 08:38:25 +0000 |
| commit | 89b1753c2289edacca05ef46e840f212f2a3025d (patch) | |
| tree | 13288ae5c44fc5dd7c6ee310157488cfcb891901 /src/soc | |
| parent | 4b47e5a851c5b21acb8d9ef6af245ccb332b14a7 (diff) | |
mediatek/mt8183: Add SPI GPIO driving setting
Set SPI GPIO driving to support SPI FLASH.
BUG=b:80501386
BRANCH=none
TEST=emerge-kukui coreboot; emerge-elm coreboot
Change-Id: I95002ec71abd751c33c089185db04ed4a8686699
Signed-off-by: Mengqi Zhang <Mengqi.Zhang@mediatek.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32460
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/soc')
| -rw-r--r-- | src/soc/mediatek/mt8183/gpio.c | 55 | ||||
| -rw-r--r-- | src/soc/mediatek/mt8183/include/soc/gpio.h | 3 |
2 files changed, 58 insertions, 0 deletions
diff --git a/src/soc/mediatek/mt8183/gpio.c b/src/soc/mediatek/mt8183/gpio.c index 327d389eb2..3eccfbd50d 100644 --- a/src/soc/mediatek/mt8183/gpio.c +++ b/src/soc/mediatek/mt8183/gpio.c @@ -15,11 +15,15 @@ #include <device/mmio.h> #include <gpio.h> +#include <assert.h> +#include <soc/spi.h> enum { EN_OFFSET = 0x60, SEL_OFFSET = 0x80, EH_RSEL_OFFSET = 0xF0, + GPIO_DRV0_OFFSET = 0xA0, + GPIO_DRV1_OFFSET = 0XB0, }; static void gpio_set_pull_pupd(gpio_t gpio, enum pull_enable enable, @@ -128,3 +132,54 @@ void gpio_set_i2c_eh_rsel(void) I2C_EH_RSL_MASK(SCL5) | I2C_EH_RSL_MASK(SDA5), I2C_EH_RSL_VAL(SCL5) | I2C_EH_RSL_VAL(SDA5)); } + +void gpio_set_spi_driving(unsigned int bus, enum spi_pad_mask pad_select, + unsigned int milliamps) +{ + void *reg = NULL; + unsigned int reg_val = milliamps / 2 - 1, offset = 0; + + assert(bus < SPI_BUS_NUMBER); + assert(milliamps >= 2 && milliamps <= 16); + assert(pad_select <= SPI_PAD1_MASK); + + switch (bus) { + case 0: + reg = (void *)(IOCFG_RB_BASE + GPIO_DRV1_OFFSET); + offset = 0; + break; + case 1: + if (pad_select == SPI_PAD0_MASK) { + reg = (void *)(IOCFG_LM_BASE + GPIO_DRV0_OFFSET); + offset = 0; + } else if (pad_select == SPI_PAD1_MASK) { + clrsetbits_le32((void *)IOCFG_RM_BASE + + GPIO_DRV0_OFFSET, 0xf | 0xf << 20, + reg_val | reg_val << 20); + clrsetbits_le32((void *)IOCFG_RM_BASE + + GPIO_DRV1_OFFSET, 0xf << 16, + reg_val << 16); + return; + } + break; + case 2: + clrsetbits_le32((void *)IOCFG_RM_BASE + GPIO_DRV0_OFFSET, + 0xf << 8 | 0xf << 12, + reg_val << 8 | reg_val << 12); + return; + case 3: + reg = (void *)(IOCFG_LM_BASE + GPIO_DRV0_OFFSET); + offset = 16; + break; + case 4: + reg = (void *)(IOCFG_LM_BASE + GPIO_DRV0_OFFSET); + offset = 12; + break; + case 5: + reg = (void *)(IOCFG_LM_BASE + GPIO_DRV0_OFFSET); + offset = 8; + break; + } + + clrsetbits_le32(reg, 0xf << offset, reg_val << offset); +} diff --git a/src/soc/mediatek/mt8183/include/soc/gpio.h b/src/soc/mediatek/mt8183/include/soc/gpio.h index 5a98953974..a0d6262abb 100644 --- a/src/soc/mediatek/mt8183/include/soc/gpio.h +++ b/src/soc/mediatek/mt8183/include/soc/gpio.h @@ -19,6 +19,7 @@ #include <soc/addressmap.h> #include <soc/gpio_common.h> #include <types.h> +#include <soc/spi_common.h> enum { MAX_GPIO_REG_BITS = 32, @@ -617,5 +618,7 @@ check_member(gpio_regs, mode[22].val, 0x460); static struct gpio_regs *const mtk_gpio = (void *)(GPIO_BASE); void gpio_set_i2c_eh_rsel(void); +void gpio_set_spi_driving(unsigned int bus, enum spi_pad_mask pad_select, + unsigned int milliamps); #endif |