diff options
Diffstat (limited to 'board/ti/am335x/board.c')
| -rw-r--r-- | board/ti/am335x/board.c | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/board/ti/am335x/board.c b/board/ti/am335x/board.c index cc0442612f..6135f07a41 100644 --- a/board/ti/am335x/board.c +++ b/board/ti/am335x/board.c @@ -26,6 +26,8 @@ #include <i2c.h> #include <miiphy.h> #include <cpsw.h> +#include <power/tps65217.h> +#include <power/tps65910.h> #include "board.h" DECLARE_GLOBAL_DATA_PTR; @@ -244,6 +246,138 @@ const struct dpll_params dpll_ddr_evm_sk = { const struct dpll_params dpll_ddr_bone_black = { 400, OSC-1, 1, -1, -1, -1, -1}; +void am33xx_spl_board_init(void) +{ + struct am335x_baseboard_id header; + struct dpll_params dpll_mpu = {0, OSC-1, 1, -1, -1, -1, -1}; + int mpu_vdd; + + if (read_eeprom(&header) < 0) + puts("Could not get board ID.\n"); + + /* Get the frequency */ + dpll_mpu.m = am335x_get_efuse_mpu_max_freq(cdev); + + if (board_is_bone(&header) || board_is_bone_lt(&header)) { + /* BeagleBone PMIC Code */ + int usb_cur_lim; + + /* + * Only perform PMIC configurations if board rev > A1 + * on Beaglebone White + */ + if (board_is_bone(&header) && !strncmp(header.version, + "00A1", 4)) + return; + + if (i2c_probe(TPS65217_CHIP_PM)) + return; + + /* + * On Beaglebone White we need to ensure we have AC power + * before increasing the frequency. + */ + if (board_is_bone(&header)) { + uchar pmic_status_reg; + if (tps65217_reg_read(TPS65217_STATUS, + &pmic_status_reg)) + return; + if (!(pmic_status_reg & TPS65217_PWR_SRC_AC_BITMASK)) { + puts("No AC power, disabling frequency switch\n"); + return; + } + } + + /* + * Override what we have detected since we know if we have + * a Beaglebone Black it supports 1GHz. + */ + if (board_is_bone_lt(&header)) + dpll_mpu.m = MPUPLL_M_1000; + + /* + * Increase USB current limit to 1300mA or 1800mA and set + * the MPU voltage controller as needed. + */ + if (dpll_mpu.m == MPUPLL_M_1000) { + usb_cur_lim = TPS65217_USB_INPUT_CUR_LIMIT_1800MA; + mpu_vdd = TPS65217_DCDC_VOLT_SEL_1325MV; + } else { + usb_cur_lim = TPS65217_USB_INPUT_CUR_LIMIT_1300MA; + mpu_vdd = TPS65217_DCDC_VOLT_SEL_1275MV; + } + + if (tps65217_reg_write(TPS65217_PROT_LEVEL_NONE, + TPS65217_POWER_PATH, + usb_cur_lim, + TPS65217_USB_INPUT_CUR_LIMIT_MASK)) + puts("tps65217_reg_write failure\n"); + + + /* Set DCDC2 (MPU) voltage */ + if (tps65217_voltage_update(TPS65217_DEFDCDC2, mpu_vdd)) { + puts("tps65217_voltage_update failure\n"); + return; + } + + /* + * Set LDO3, LDO4 output voltage to 3.3V for Beaglebone. + * Set LDO3 to 1.8V and LDO4 to 3.3V for Beaglebone Black. + */ + if (board_is_bone(&header)) { + if (tps65217_reg_write(TPS65217_PROT_LEVEL_2, + TPS65217_DEFLS1, + TPS65217_LDO_VOLTAGE_OUT_3_3, + TPS65217_LDO_MASK)) + puts("tps65217_reg_write failure\n"); + } else { + if (tps65217_reg_write(TPS65217_PROT_LEVEL_2, + TPS65217_DEFLS1, + TPS65217_LDO_VOLTAGE_OUT_1_8, + TPS65217_LDO_MASK)) + puts("tps65217_reg_write failure\n"); + } + + if (tps65217_reg_write(TPS65217_PROT_LEVEL_2, + TPS65217_DEFLS2, + TPS65217_LDO_VOLTAGE_OUT_3_3, + TPS65217_LDO_MASK)) + puts("tps65217_reg_write failure\n"); + } else { + int sil_rev; + + /* + * The GP EVM, IDK and EVM SK use a TPS65910 PMIC. For all + * MPU frequencies we support we use a CORE voltage of + * 1.1375V. For MPU voltage we need to switch based on + * the frequency we are running at. + */ + if (i2c_probe(TPS65910_CTRL_I2C_ADDR)) + return; + + /* + * Depending on MPU clock and PG we will need a different + * VDD to drive at that speed. + */ + sil_rev = readl(&cdev->deviceid) >> 28; + mpu_vdd = am335x_get_tps65910_mpu_vdd(sil_rev, dpll_mpu.m); + + /* Tell the TPS65910 to use i2c */ + tps65910_set_i2c_control(); + + /* First update MPU voltage. */ + if (tps65910_voltage_update(MPU, mpu_vdd)) + return; + + /* Second, update the CORE voltage. */ + if (tps65910_voltage_update(CORE, TPS65910_OP_REG_SEL_1_1_3)) + return; + } + + /* Set MPU Frequency to what we detected now that voltages are set */ + do_setup_dpll(&dpll_mpu_regs, &dpll_mpu); +} + const struct dpll_params *get_dpll_ddr_params(void) { struct am335x_baseboard_id header; |