diff options
Diffstat (limited to 'src/mainboard/google/peach_pit/romstage.c')
-rw-r--r-- | src/mainboard/google/peach_pit/romstage.c | 279 |
1 files changed, 279 insertions, 0 deletions
diff --git a/src/mainboard/google/peach_pit/romstage.c b/src/mainboard/google/peach_pit/romstage.c new file mode 100644 index 0000000000..16dc997e75 --- /dev/null +++ b/src/mainboard/google/peach_pit/romstage.c @@ -0,0 +1,279 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 2013 Google Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <types.h> +#include <stdlib.h> + +#include <armv7.h> +#include <cbfs.h> +#include <cbmem.h> + +#include <arch/cache.h> +#include <arch/exception.h> +#include <soc/samsung/exynos5420/i2c.h> +#include <soc/samsung/exynos5420/clk.h> +#include <soc/samsung/exynos5420/cpu.h> +#include <soc/samsung/exynos5420/dmc.h> +#include <soc/samsung/exynos5420/gpio.h> +#include <soc/samsung/exynos5420/setup.h> +#include <soc/samsung/exynos5420/periph.h> +#include <soc/samsung/exynos5420/power.h> +#include <soc/samsung/exynos5420/trustzone.h> +#include <soc/samsung/exynos5420/wakeup.h> +#include <console/console.h> +#include <arch/stages.h> + +#include <drivers/maxim/max77802/max77802.h> +#include <device/i2c.h> + +#define PMIC_I2C_BUS 4 + +struct pmic_write +{ + int or_orig; // Whether to or in the original value. + uint8_t reg; // Register to write. + uint8_t val; // Value to write. +}; + +/* + * Use read-modify-write for MAX77802 control registers and clobber the + * output voltage setting (BUCK?DVS?) registers. + */ +struct pmic_write pmic_writes[] = +{ + { 1, MAX77802_REG_PMIC_32KHZ, MAX77802_32KHCP_EN }, + { 0, MAX77802_REG_PMIC_BUCK1DVS1, MAX77802_BUCK1DVS1_1V }, + { 1, MAX77802_REG_PMIC_BUCK1CTRL, MAX77802_BUCK_TYPE1_ON | + MAX77802_BUCK_TYPE1_IGNORE_PWRREQ }, + { 0, MAX77802_REG_PMIC_BUCK2DVS1, MAX77802_BUCK2DVS1_1_2625V }, + { 1, MAX77802_REG_PMIC_BUCK2CTRL1, MAX77802_BUCK_TYPE2_ON | + MAX77802_BUCK_TYPE2_IGNORE_PWRREQ }, + { 0, MAX77802_REG_PMIC_BUCK3DVS1, MAX77802_BUCK3DVS1_1V }, + { 1, MAX77802_REG_PMIC_BUCK3CTRL1, MAX77802_BUCK_TYPE2_ON | + MAX77802_BUCK_TYPE2_IGNORE_PWRREQ }, + { 0, MAX77802_REG_PMIC_BUCK4DVS1, MAX77802_BUCK4DVS1_1V }, + { 1, MAX77802_REG_PMIC_BUCK4CTRL1, MAX77802_BUCK_TYPE2_ON | + MAX77802_BUCK_TYPE2_IGNORE_PWRREQ }, + { 0, MAX77802_REG_PMIC_BUCK6DVS1, MAX77802_BUCK6DVS1_1V }, + { 1, MAX77802_REG_PMIC_BUCK6CTRL, MAX77802_BUCK_TYPE1_ON | + MAX77802_BUCK_TYPE1_IGNORE_PWRREQ }, + /* Disable Boost(bypass) OUTPUT */ + { 0, MAX77802_REG_PMIC_BOOSTCTRL, MAX77802_BOOSTCTRL_OFF}, +}; + +static int setup_power(int is_resume) +{ + int error = 0; + int i; + + power_init(); + + if (is_resume) { + return 0; + } + + /* Initialize I2C bus to configure PMIC. */ + exynos_pinmux_i2c4(); + i2c_init(PMIC_I2C_BUS, 1000000, 0x00); /* 1MHz */ + + for (i = 0; i < ARRAY_SIZE(pmic_writes); i++) { + uint8_t data = 0; + uint8_t reg = pmic_writes[i].reg; + + if (pmic_writes[i].or_orig) + error |= i2c_read(4, MAX77802_I2C_ADDR, + reg, sizeof(reg), + &data, sizeof(data)); + data |= pmic_writes[i].val; + error |= i2c_write(4, MAX77802_I2C_ADDR, + reg, sizeof(reg), + &data, sizeof(data)); + } + + return error; +} + +static void setup_ec(void) +{ + /* SPI2 (EC) is slower and needs to work in half-duplex mode with + * single byte bus width. */ + clock_set_rate(PERIPH_ID_SPI2, 5000000); + exynos_pinmux_spi2(); +} + +static void setup_gpio(void) +{ + gpio_direction_input(GPIO_X30); // WP_GPIO + gpio_set_pull(GPIO_X30, GPIO_PULL_NONE); + + gpio_direction_input(GPIO_X07); // RECMODE_GPIO + gpio_set_pull(GPIO_X07, GPIO_PULL_NONE); + + gpio_direction_input(GPIO_X34); // LID_GPIO + gpio_set_pull(GPIO_X34, GPIO_PULL_NONE); + + gpio_direction_input(GPIO_X12); // POWER_GPIO + gpio_set_pull(GPIO_X12, GPIO_PULL_NONE); +} + +static void setup_memory(struct mem_timings *mem, int is_resume) +{ + printk(BIOS_SPEW, "manufacturer: 0x%x type: 0x%x, div: 0x%x, mhz: %d\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"); + } +} + +#define PRIMITIVE_MEM_TEST 0 +#if PRIMITIVE_MEM_TEST +static unsigned long primitive_mem_test(void) +{ + unsigned long *l = (void *)0x40000000; + int bad = 0; + unsigned long i; + for(i = 0; i < 256*1048576; i++){ + if (! (i%1048576)) + printk(BIOS_SPEW, "%lu ...", i); + l[i] = 0xffffffff - i; + } + + for(i = 0; i < 256*1048576; i++){ + if (! (i%1048576)) + printk(BIOS_SPEW, "%lu ...", i); + if (l[i] != (0xffffffff - i)){ + printk(BIOS_SPEW, "%p: want %08lx got %08lx\n", l, l[i], 0xffffffff - i); + bad++; + } + } + + printk(BIOS_SPEW, "%d errors\n", bad); + + return bad; +} +#else +#define primitive_mem_test() +#endif + +#define SIMPLE_SPI_TEST 0 +#if SIMPLE_SPI_TEST +/* here is a simple SPI debug test, known to fid trouble */ +static void simple_spi_test(void) +{ + struct cbfs_media default_media, *media; + int i, amt = 4 * MiB, errors = 0; + //u32 *data = (void *)0x40000000; + u32 data[1024]; + u32 in; + + amt = sizeof(data); + media = &default_media; + if (init_default_cbfs_media(media) != 0) { + printk(BIOS_SPEW, "Failed to initialize default media.\n"); + return; + } + + + media->open(media); + if (media->read(media, data, (size_t) 0, amt) < amt){ + printk(BIOS_SPEW, "simple_spi_test fails\n"); + return; + } + + + for(i = 0; i < amt; i += 4){ + if (media->read(media, &in, (size_t) i, 4) < 1){ + printk(BIOS_SPEW, "simple_spi_test fails at %d\n", i); + return; + } + if (data[i/4] != in){ + errors++; + printk(BIOS_SPEW, "BAD at %d(%p):\nRAM %08lx\nSPI %08lx\n", + i, &data[i/4], (unsigned long)data[i/4], (unsigned long)in); + /* reread it to see which is wrong. */ + if (media->read(media, &in, (size_t) i, 4) < 1){ + printk(BIOS_SPEW, "simple_spi_test fails at %d\n", i); + return; + } + printk(BIOS_SPEW, "RTRY at %d(%p):\nRAM %08lx\nSPI %08lx\n", + i, &data[i/4], (unsigned long)data[i/4], (unsigned long)in); + } + + } + printk(BIOS_SPEW, "%d errors\n", errors); +} +#else +#define simple_spi_test() +#endif + +void main(void) +{ + + extern struct mem_timings mem_timings; + void *entry; + int is_resume = (get_wakeup_state() != IS_NOT_WAKEUP); + int power_init_failed; + + exynos5420_config_smp(); + power_init_failed = setup_power(is_resume); + + /* Clock must be initialized before console_init, otherwise you may need + * to re-initialize serial console drivers again. */ + system_clock_init(); + + exynos_pinmux_uart3(); + console_init(); + exception_init(); + + if (power_init_failed) + die("Failed to intialize power.\n"); + + /* re-initialize PMIC I2C channel after (re-)setting system clocks */ + i2c_init(PMIC_I2C_BUS, 1000000, 0x00); /* 1MHz */ + + setup_memory(&mem_timings, is_resume); + + primitive_mem_test(); + + trustzone_init(); + + if (is_resume) { + wakeup(); + } + + setup_gpio(); + setup_ec(); + + simple_spi_test(); + /* Set SPI (primary CBFS media) clock to 50MHz. */ + /* if this is uncommented SPI will not work correctly. */ + clock_set_rate(PERIPH_ID_SPI1, 50000000); + exynos_pinmux_spi1(); + simple_spi_test(); + + cbmem_initialize_empty(); + + entry = cbfs_load_stage(CBFS_DEFAULT_MEDIA, "fallback/ramstage"); + simple_spi_test(); + stage_exit(entry); +} |