diff options
Diffstat (limited to 'src/mainboard/cubietech/cubieboard/romstage.c')
-rw-r--r-- | src/mainboard/cubietech/cubieboard/romstage.c | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/src/mainboard/cubietech/cubieboard/romstage.c b/src/mainboard/cubietech/cubieboard/romstage.c index 19192cdc40..1b4d886b2a 100644 --- a/src/mainboard/cubietech/cubieboard/romstage.c +++ b/src/mainboard/cubietech/cubieboard/romstage.c @@ -6,9 +6,67 @@ */ #include <console/console.h> +#include <cpu/allwinner/a10/clock.h> +#include <cpu/allwinner/a10/gpio.h> +#include <cpu/allwinner/a10/twi.h> +#define __SIMPLE_DEVICE__ +#include <device/device.h> +#include <drivers/xpowers/axp209/axp209.h> +#include <drivers/xpowers/axp209/chip.h> + + +#define GPB_TWI0_FUNC 2 +#define GPB_TWI0_PINS ((1 << 0) | (1 << 1)) + +#define AXP209_BUS 0 + +static enum cb_err cubieboard_setup_power(void) +{ + enum cb_err err; + const struct device * pmu; + const struct drivers_xpowers_axp209_config *cfg; + + /* Find the AXP209 in devicetree */ + pmu = dev_find_slot_on_smbus(AXP209_BUS, AXP209_I2C_ADDR); + if (!pmu) { + printk(BIOS_ERR, "AXP209 not found in devicetree.cb\n"); + return CB_ERR; + } + + cfg = pmu->chip_info; + + /* Mux TWI0 pins */ + gpio_set_multipin_func(GPB, GPB_TWI0_PINS, GPB_TWI0_FUNC); + /* Enable TWI0 */ + a1x_periph_clock_enable(A1X_CLKEN_TWI0); + a1x_twi_init(AXP209_BUS, 400000); + + if ((err = axp209_init(AXP209_BUS)) != CB_SUCCESS) { + printk(BIOS_ERR, "PMU initialization failed\n"); + return err; + } + + if ((err = axp209_set_voltages(AXP209_BUS, cfg)) != CB_SUCCESS) { + printk(BIOS_WARNING, "Power setup incomplete: " + "CPU may hang when increasing clock\n"); + return err; + } + + printk(BIOS_SPEW, "VDD CPU (DCDC2): %imv\n", cfg->dcdc2_voltage_mv); + printk(BIOS_SPEW, "VDD DLL (DCDC3): %imv\n", cfg->dcdc3_voltage_mv); + printk(BIOS_SPEW, "AVCC (LDO2) : %imv\n", cfg->ldo2_voltage_mv); + printk(BIOS_SPEW, "CSI1-IO (LDO4) : %imv\n", cfg->ldo4_voltage_mv); + printk(BIOS_SPEW, "(LDO3) : %imv\n", cfg->ldo3_voltage_mv); + + return CB_SUCCESS; +} void main(void) { console_init(); printk(BIOS_INFO, "You have managed to succesfully load romstage.\n"); + + /* Configure power rails */ + cubieboard_setup_power(); + } |