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authorMengqi Zhang <Mengqi.Zhang@mediatek.com>2019-04-24 10:14:52 +0800
committerPatrick Georgi <pgeorgi@google.com>2019-06-21 08:38:25 +0000
commit89b1753c2289edacca05ef46e840f212f2a3025d (patch)
tree13288ae5c44fc5dd7c6ee310157488cfcb891901
parent4b47e5a851c5b21acb8d9ef6af245ccb332b14a7 (diff)
downloadcoreboot-89b1753c2289edacca05ef46e840f212f2a3025d.tar.xz
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>
-rw-r--r--src/mainboard/google/kukui/bootblock.c3
-rw-r--r--src/soc/mediatek/mt8183/gpio.c55
-rw-r--r--src/soc/mediatek/mt8183/include/soc/gpio.h3
3 files changed, 61 insertions, 0 deletions
diff --git a/src/mainboard/google/kukui/bootblock.c b/src/mainboard/google/kukui/bootblock.c
index 9d6c38ba64..9a7e71c292 100644
--- a/src/mainboard/google/kukui/bootblock.c
+++ b/src/mainboard/google/kukui/bootblock.c
@@ -15,9 +15,12 @@
#include <bootblock_common.h>
#include <soc/spi.h>
+#include <soc/gpio.h>
void bootblock_mainboard_init(void)
{
mtk_spi_init(CONFIG_EC_GOOGLE_CHROMEEC_SPI_BUS, SPI_PAD0_MASK, 6 * MHz);
mtk_spi_init(CONFIG_BOOT_DEVICE_SPI_FLASH_BUS, SPI_PAD0_MASK, 26 * MHz);
+ gpio_set_spi_driving(CONFIG_BOOT_DEVICE_SPI_FLASH_BUS, SPI_PAD0_MASK,
+ 10);
}
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