mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-23 11:29:43 +09:00
cf04d0326b
Updating the Multiplier and Dividers value for all DPLLs. Safest OPP is read from DEV ATTRIBUTE register. Accoring to the value returned the MPU DPLL is locked. At different OPPs follwoing are the MPU locked frequencies. OPP50 300MHz OPP100 600MHz OPP120 720MHz OPPTB 800MHz OPPNT 1000MHz According to the latest DM following is the OPP table dependencies: VDD_CORE VDD_MPU OPP50 OPP50 OPP50 OPP100 OPP100 OPP50 OPP100 OPP100 OPP100 OPP120 So at different OPPs of MPU it is safest to lock CORE at OPP_NOM. Following are the DPLL locking frequencies at OPP NOM: Core locks at 1000MHz Per locks at 960MHz LPDDR2 locks at 266MHz DDR3 locks at 400MHz Touching AM33xx files also to get DPLL values specific to board but no functionality difference. Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
252 lines
6.4 KiB
C
252 lines
6.4 KiB
C
/*
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* board.c
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*
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* Board functions for TI AM43XX based boards
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*
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* Copyright (C) 2013, Texas Instruments, Incorporated - http://www.ti.com/
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <i2c.h>
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#include <asm/errno.h>
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#include <spl.h>
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#include <asm/arch/clock.h>
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#include <asm/arch/sys_proto.h>
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#include <asm/arch/mux.h>
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#include "board.h"
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DECLARE_GLOBAL_DATA_PTR;
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/*
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* Read header information from EEPROM into global structure.
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*/
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static int read_eeprom(struct am43xx_board_id *header)
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{
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/* Check if baseboard eeprom is available */
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if (i2c_probe(CONFIG_SYS_I2C_EEPROM_ADDR)) {
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printf("Could not probe the EEPROM at 0x%x\n",
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CONFIG_SYS_I2C_EEPROM_ADDR);
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return -ENODEV;
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}
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/* read the eeprom using i2c */
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if (i2c_read(CONFIG_SYS_I2C_EEPROM_ADDR, 0, 2, (uchar *)header,
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sizeof(struct am43xx_board_id))) {
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printf("Could not read the EEPROM\n");
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return -EIO;
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}
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if (header->magic != 0xEE3355AA) {
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/*
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* read the eeprom using i2c again,
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* but use only a 1 byte address
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*/
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if (i2c_read(CONFIG_SYS_I2C_EEPROM_ADDR, 0, 1, (uchar *)header,
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sizeof(struct am43xx_board_id))) {
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printf("Could not read the EEPROM at 0x%x\n",
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CONFIG_SYS_I2C_EEPROM_ADDR);
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return -EIO;
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}
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if (header->magic != 0xEE3355AA) {
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printf("Incorrect magic number (0x%x) in EEPROM\n",
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header->magic);
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return -EINVAL;
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}
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}
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strncpy(am43xx_board_name, (char *)header->name, sizeof(header->name));
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am43xx_board_name[sizeof(header->name)] = 0;
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return 0;
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}
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#ifdef CONFIG_SPL_BUILD
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#define NUM_OPPS 6
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const struct dpll_params dpll_mpu[NUM_CRYSTAL_FREQ][NUM_OPPS] = {
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{ /* 19.2 MHz */
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{-1, -1, -1, -1, -1, -1, -1}, /* OPP 50 */
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{-1, -1, -1, -1, -1, -1, -1}, /* OPP RESERVED */
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{-1, -1, -1, -1, -1, -1, -1}, /* OPP 100 */
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{-1, -1, -1, -1, -1, -1, -1}, /* OPP 120 */
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{-1, -1, -1, -1, -1, -1, -1}, /* OPP TB */
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{-1, -1, -1, -1, -1, -1, -1} /* OPP NT */
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},
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{ /* 24 MHz */
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{300, 23, 1, -1, -1, -1, -1}, /* OPP 50 */
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{-1, -1, -1, -1, -1, -1, -1}, /* OPP RESERVED */
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{600, 23, 1, -1, -1, -1, -1}, /* OPP 100 */
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{720, 23, 1, -1, -1, -1, -1}, /* OPP 120 */
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{800, 23, 1, -1, -1, -1, -1}, /* OPP TB */
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{1000, 23, 1, -1, -1, -1, -1} /* OPP NT */
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},
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{ /* 25 MHz */
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{300, 24, 1, -1, -1, -1, -1}, /* OPP 50 */
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{-1, -1, -1, -1, -1, -1, -1}, /* OPP RESERVED */
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{600, 24, 1, -1, -1, -1, -1}, /* OPP 100 */
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{720, 24, 1, -1, -1, -1, -1}, /* OPP 120 */
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{800, 24, 1, -1, -1, -1, -1}, /* OPP TB */
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{1000, 24, 1, -1, -1, -1, -1} /* OPP NT */
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},
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{ /* 26 MHz */
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{300, 25, 1, -1, -1, -1, -1}, /* OPP 50 */
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{-1, -1, -1, -1, -1, -1, -1}, /* OPP RESERVED */
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{600, 25, 1, -1, -1, -1, -1}, /* OPP 100 */
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{720, 25, 1, -1, -1, -1, -1}, /* OPP 120 */
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{800, 25, 1, -1, -1, -1, -1}, /* OPP TB */
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{1000, 25, 1, -1, -1, -1, -1} /* OPP NT */
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},
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};
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const struct dpll_params dpll_core[NUM_CRYSTAL_FREQ] = {
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{-1, -1, -1, -1, -1, -1, -1}, /* 19.2 MHz */
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{1000, 23, -1, -1, 10, 8, 4}, /* 24 MHz */
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{1000, 24, -1, -1, 10, 8, 4}, /* 25 MHz */
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{1000, 25, -1, -1, 10, 8, 4} /* 26 MHz */
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};
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const struct dpll_params dpll_per[NUM_CRYSTAL_FREQ] = {
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{-1, -1, -1, -1, -1, -1, -1}, /* 19.2 MHz */
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{960, 23, 5, -1, -1, -1, -1}, /* 24 MHz */
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{960, 24, 5, -1, -1, -1, -1}, /* 25 MHz */
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{960, 25, 5, -1, -1, -1, -1} /* 26 MHz */
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};
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const struct dpll_params epos_evm_dpll_ddr = {
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266, 24, 1, -1, 1, -1, -1};
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const struct dpll_params gp_evm_dpll_ddr = {
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400, 23, 1, -1, 1, -1, -1};
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const struct dpll_params *get_dpll_ddr_params(void)
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{
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struct am43xx_board_id header;
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enable_i2c0_pin_mux();
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i2c_init(CONFIG_SYS_OMAP24_I2C_SPEED, CONFIG_SYS_OMAP24_I2C_SLAVE);
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if (read_eeprom(&header) < 0)
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puts("Could not get board ID.\n");
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if (board_is_eposevm())
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return &epos_evm_dpll_ddr;
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else if (board_is_gpevm())
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return &gp_evm_dpll_ddr;
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puts(" Board not supported\n");
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return NULL;
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}
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/*
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* get_sys_clk_index : returns the index of the sys_clk read from
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* ctrl status register. This value is either
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* read from efuse or sysboot pins.
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*/
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static u32 get_sys_clk_index(void)
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{
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struct ctrl_stat *ctrl = (struct ctrl_stat *)CTRL_BASE;
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u32 ind = readl(&ctrl->statusreg), src;
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src = (ind & CTRL_CRYSTAL_FREQ_SRC_MASK) >> CTRL_CRYSTAL_FREQ_SRC_SHIFT;
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if (src == CTRL_CRYSTAL_FREQ_SRC_EFUSE) /* Value read from EFUSE */
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return ((ind & CTRL_CRYSTAL_FREQ_SELECTION_MASK) >>
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CTRL_CRYSTAL_FREQ_SELECTION_SHIFT);
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else /* Value read from SYS BOOT pins */
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return ((ind & CTRL_SYSBOOT_15_14_MASK) >>
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CTRL_SYSBOOT_15_14_SHIFT);
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}
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/*
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* get_opp_offset:
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* Returns the index for safest OPP of the device to boot.
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* max_off: Index of the MAX OPP in DEV ATTRIBUTE register.
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* min_off: Index of the MIN OPP in DEV ATTRIBUTE register.
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* This data is read from dev_attribute register which is e-fused.
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* A'1' in bit indicates OPP disabled and not available, a '0' indicates
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* OPP available. Lowest OPP starts with min_off. So returning the
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* bit with rightmost '0'.
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*/
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static int get_opp_offset(int max_off, int min_off)
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{
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struct ctrl_stat *ctrl = (struct ctrl_stat *)CTRL_BASE;
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int opp = readl(&ctrl->dev_attr), offset, i;
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for (i = max_off; i >= min_off; i--) {
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offset = opp & (1 << i);
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if (!offset)
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return i;
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}
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return min_off;
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}
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const struct dpll_params *get_dpll_mpu_params(void)
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{
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int opp = get_opp_offset(DEV_ATTR_MAX_OFFSET, DEV_ATTR_MIN_OFFSET);
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u32 ind = get_sys_clk_index();
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return &dpll_mpu[ind][opp];
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}
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const struct dpll_params *get_dpll_core_params(void)
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{
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int ind = get_sys_clk_index();
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return &dpll_core[ind];
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}
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const struct dpll_params *get_dpll_per_params(void)
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{
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int ind = get_sys_clk_index();
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return &dpll_per[ind];
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}
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void set_uart_mux_conf(void)
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{
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enable_uart0_pin_mux();
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}
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void set_mux_conf_regs(void)
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{
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enable_board_pin_mux();
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}
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void sdram_init(void)
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{
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}
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#endif
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int board_init(void)
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{
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gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE + 0x100;
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return 0;
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}
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#ifdef CONFIG_BOARD_LATE_INIT
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int board_late_init(void)
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{
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#ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
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char safe_string[HDR_NAME_LEN + 1];
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struct am43xx_board_id header;
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if (read_eeprom(&header) < 0)
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puts("Could not get board ID.\n");
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/* Now set variables based on the header. */
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strncpy(safe_string, (char *)header.name, sizeof(header.name));
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safe_string[sizeof(header.name)] = 0;
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setenv("board_name", safe_string);
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strncpy(safe_string, (char *)header.version, sizeof(header.version));
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safe_string[sizeof(header.version)] = 0;
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setenv("board_rev", safe_string);
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#endif
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return 0;
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}
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#endif
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