From 31039e315c78b1b8a2cbef108ec4c07cb95c5e60 Mon Sep 17 00:00:00 2001 From: Hung-Te Lin Date: Thu, 25 Apr 2013 19:30:19 +0800 Subject: google/snow: Revise romstage initialization code. Move board setup procedure to snow_setup_* functions, and Snow board-specific (wakeup) code to snow_* for better function names and comments. Verified by successfully building and booting on Google/Snow. Change-Id: I2942d75064135093eeb1c1da188a005fd255111d Signed-off-by: Hung-Te Lin Reviewed-on: http://review.coreboot.org/3130 Reviewed-by: Ronald G. Minnich Tested-by: build bot (Jenkins) --- src/mainboard/google/snow/mainboard.h | 10 ++-- src/mainboard/google/snow/romstage.c | 92 ++++++++++++++++++----------------- src/mainboard/google/snow/wakeup.c | 14 +++--- 3 files changed, 59 insertions(+), 57 deletions(-) (limited to 'src/mainboard/google') diff --git a/src/mainboard/google/snow/mainboard.h b/src/mainboard/google/snow/mainboard.h index 63a2c18c63..5060b720f3 100644 --- a/src/mainboard/google/snow/mainboard.h +++ b/src/mainboard/google/snow/mainboard.h @@ -36,14 +36,14 @@ enum snow_board_config { int board_get_config(void); enum { - BOARD_IS_NOT_WAKEUP, // A normal boot (not suspend/resume). - BOARD_WAKEUP_DIRECT, // A wake up event that can be resumed any time. - BOARD_WAKEUP_NEED_CLOCK_RESET, // A wake up event that must be resumed + SNOW_IS_NOT_WAKEUP, // A normal boot (not suspend/resume). + SNOW_WAKEUP_DIRECT, // A wake up event that can be resumed any time. + SNOW_WAKEUP_NEED_CLOCK_RESET, // A wake up event that must be resumed // only after clock and memory // controllers are re-initialized. }; -int board_get_wakeup_state(void); -void board_wakeup(void); +int snow_get_wakeup_state(void); +void snow_wakeup(void); #endif /* MAINBOARD_H */ diff --git a/src/mainboard/google/snow/romstage.c b/src/mainboard/google/snow/romstage.c index 6e312fa4ca..fd5cfcec4c 100644 --- a/src/mainboard/google/snow/romstage.c +++ b/src/mainboard/google/snow/romstage.c @@ -46,10 +46,16 @@ #define PMIC_BUS 0 #define MMC0_GPIO_PIN (58) -static int setup_pmic(void) +static void snow_setup_power(void) { int error = 0; + power_init(); + + /* Initialize I2C bus to configure PMIC. */ + i2c_init(0, CONFIG_SYS_I2C_SPEED, 0x00); + + printk(BIOS_DEBUG, "%s: Setting up PMIC...\n", __func__); /* * We're using CR1616 coin cell battery that is non-rechargeable * battery. But, BBCHOSTEN bit of the BBAT Charger Register in @@ -81,19 +87,19 @@ static int setup_pmic(void) error |= max77686_enable_32khz_cp(PMIC_BUS); - if (error) - printk(BIOS_CRIT, "%s: Error during PMIC setup\n", __func__); - - return error; + if (error) { + printk(BIOS_CRIT, "%s: PMIC error: %#x\n", __func__, error); + die("Failed to intialize PMIC.\n"); + } } -static void initialize_s5p_mshc(void) +static void snow_setup_storage(void) { /* MMC0: Fixed, 8 bit mode, connected with GPIO. */ if (clock_set_mshci(PERIPH_ID_SDMMC0)) - printk(BIOS_CRIT, "Failed to set clock for SDMMC0.\n"); + printk(BIOS_CRIT, "%s: Failed to set MMC0 clock.\n", __func__); if (gpio_direction_output(MMC0_GPIO_PIN, 1)) { - printk(BIOS_CRIT, "Unable to power on SDMMC0.\n"); + printk(BIOS_CRIT, "%s: Unable to power on MMC0.\n", __func__); } gpio_set_pull(MMC0_GPIO_PIN, EXYNOS_GPIO_PULL_NONE); gpio_set_drv(MMC0_GPIO_PIN, EXYNOS_GPIO_DRV_4X); @@ -104,12 +110,12 @@ static void initialize_s5p_mshc(void) exynos_pinmux_config(PERIPH_ID_SDMMC2, 0); } -static void graphics(void) +static void snow_setup_graphics(void) { exynos_pinmux_config(PERIPH_ID_DPHPD, 0); } -static void chromeos_gpios(void) +static void snow_setup_gpio(void) { struct exynos5_gpio_part1 *gpio_pt1; struct exynos5_gpio_part2 *gpio_pt2; @@ -137,53 +143,49 @@ static void chromeos_gpios(void) s5p_gpio_set_pull(&gpio_pt2->x1, POWER_GPIO, EXYNOS_GPIO_PULL_NONE); } +static void snow_setup_memory(struct mem_timings *mem, int is_resume) +{ + printk(BIOS_SPEW, "man: 0x%x type: 0x%x, div: 0x%x, mhz: 0x%x\n", + mem->mem_manuf, + mem->mem_type, + mem->mpll_mdiv, + mem->frequency_mhz); + if (ddr3_mem_ctrl_init(mem, DMC_INTERLEAVE_SIZE, !is_resume)) { + die("Failed to initialize memory controller.\n"); + } +} + +static struct mem_timings *snow_setup_clock(void) +{ + struct mem_timings *mem = get_mem_timings(); + struct arm_clk_ratios *arm_ratios = get_arm_clk_ratios(); + if (!mem) { + die("Unable to auto-detect memory timings\n"); + } + system_clock_init(mem, arm_ratios); + return mem; +} + void main(void) { struct mem_timings *mem; - struct arm_clk_ratios *arm_ratios; - int ret; void *entry; - clock_set_rate(PERIPH_ID_SPI1, 50000000); /* set spi clock to 50Mhz */ - /* Clock must be initialized before console_init, otherwise you may need * to re-initialize serial console drivers again. */ - mem = get_mem_timings(); - arm_ratios = get_arm_clk_ratios(); - system_clock_init(mem, arm_ratios); + mem = snow_setup_clock(); console_init(); + snow_setup_power(); - i2c_init(0, CONFIG_SYS_I2C_SPEED, 0x00); - if (power_init()) - power_shutdown(); - printk(BIOS_DEBUG, "%s: setting up pmic...\n", __func__); - if (setup_pmic()) - power_shutdown(); - - if (!mem) { - printk(BIOS_CRIT, "Unable to auto-detect memory timings\n"); - while(1); - } - printk(BIOS_SPEW, "man: 0x%x type: 0x%x, div: 0x%x, mhz: 0x%x\n", - mem->mem_manuf, - mem->mem_type, - mem->mpll_mdiv, - mem->frequency_mhz); - - ret = ddr3_mem_ctrl_init(mem, DMC_INTERLEAVE_SIZE, 1); - if (ret) { - printk(BIOS_ERR, "Memory controller init failed, err: %x\n", - ret); - while(1); - } - - initialize_s5p_mshc(); - - chromeos_gpios(); + snow_setup_memory(mem, 0); - graphics(); + snow_setup_storage(); + snow_setup_gpio(); + snow_setup_graphics(); + /* Set SPI (primary CBFS media) clock to 50MHz. */ + clock_set_rate(PERIPH_ID_SPI1, 50000000); entry = cbfs_load_stage(CBFS_DEFAULT_MEDIA, "fallback/coreboot_ram"); printk(BIOS_INFO, "entry is 0x%p, leaving romstage.\n", entry); diff --git a/src/mainboard/google/snow/wakeup.c b/src/mainboard/google/snow/wakeup.c index 33ea9d8fd1..8bb1724a2d 100644 --- a/src/mainboard/google/snow/wakeup.c +++ b/src/mainboard/google/snow/wakeup.c @@ -26,16 +26,16 @@ #include "mainboard.h" -static int wakeup_need_reset(void) +static int snow_wakeup_need_reset(void) { /* The "wake up" event is not reliable (known as "bad wakeup") and needs * reset if GPIO value is high. */ return gpio_get_value(GPIO_Y10); } -void board_wakeup(void) +void snow_wakeup(void) { - if (wakeup_need_reset()) + if (snow_wakeup_need_reset()) power_reset(); power_init(); /* Ensure ps_hold_setup() for early wakeup. */ @@ -44,7 +44,7 @@ void board_wakeup(void) die("Failed to wake up.\n"); } -int board_get_wakeup_state() +int snow_get_wakeup_state() { uint32_t status = power_read_reset_status(); @@ -53,10 +53,10 @@ int board_get_wakeup_state() */ if (status == S5P_CHECK_DIDLE || status == S5P_CHECK_LPA) - return BOARD_WAKEUP_DIRECT; + return SNOW_WAKEUP_DIRECT; if (status == S5P_CHECK_SLEEP) - return BOARD_WAKEUP_NEED_CLOCK_RESET; + return SNOW_WAKEUP_NEED_CLOCK_RESET; - return BOARD_IS_NOT_WAKEUP; + return SNOW_IS_NOT_WAKEUP; } -- cgit v1.2.3