Hung-Te Lin (hungte@chromium.org) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/3130
-gerrit
commit d532d5be7a74626c16f3d57be5b89fdc4c761124 Author: Hung-Te Lin hungte@chromium.org Date: Thu Apr 25 19:30:19 2013 +0800
google/snow: Revise romstage initialization code.
Move board setup procedure to board_setup_* functions, with better function names and comments.
Verified by successfully building and booting on Google/Snow.
Change-Id: I2942d75064135093eeb1c1da188a005fd255111d Signed-off-by: Hung-Te Lin hungte@chromium.org --- src/mainboard/google/snow/romstage.c | 92 ++++++++++++++++++------------------ 1 file changed, 47 insertions(+), 45 deletions(-)
diff --git a/src/mainboard/google/snow/romstage.c b/src/mainboard/google/snow/romstage.c index 6e312fa..c067629 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 board_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 board_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 board_setup_graphics(void) { exynos_pinmux_config(PERIPH_ID_DPHPD, 0); }
-static void chromeos_gpios(void) +static void board_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 board_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 *board_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 = board_setup_clock();
console_init(); + board_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(); + board_setup_memory(mem, 0);
- graphics(); + board_setup_storage(); + board_setup_gpio(); + board_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);