527 lines
10 KiB
C
527 lines
10 KiB
C
/*
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* Copyright (c) 2017-2022, STMicroelectronics - All Rights Reserved
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <assert.h>
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#include <errno.h>
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#include <common/debug.h>
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#include <drivers/delay_timer.h>
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#include <drivers/st/regulator.h>
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#include <drivers/st/stm32_i2c.h>
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#include <drivers/st/stm32mp_pmic.h>
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#include <drivers/st/stpmic1.h>
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#include <lib/mmio.h>
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#include <lib/utils_def.h>
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#include <libfdt.h>
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#include <platform_def.h>
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#define PMIC_NODE_NOT_FOUND 1
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static struct i2c_handle_s i2c_handle;
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static uint32_t pmic_i2c_addr;
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static int register_pmic(void);
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static int dt_get_pmic_node(void *fdt)
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{
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static int node = -FDT_ERR_BADOFFSET;
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if (node == -FDT_ERR_BADOFFSET) {
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node = fdt_node_offset_by_compatible(fdt, -1, "st,stpmic1");
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}
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return node;
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}
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int dt_pmic_status(void)
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{
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static int status = -FDT_ERR_BADVALUE;
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int node;
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void *fdt;
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if (status != -FDT_ERR_BADVALUE) {
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return status;
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}
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if (fdt_get_address(&fdt) == 0) {
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return -ENOENT;
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}
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node = dt_get_pmic_node(fdt);
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if (node <= 0) {
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status = -FDT_ERR_NOTFOUND;
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return status;
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}
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status = (int)fdt_get_status(node);
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return status;
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}
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static bool dt_pmic_is_secure(void)
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{
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int status = dt_pmic_status();
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return (status >= 0) &&
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(status == DT_SECURE) &&
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(i2c_handle.dt_status == DT_SECURE);
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}
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/*
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* Get PMIC and its I2C bus configuration from the device tree.
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* Return 0 on success, negative on error, 1 if no PMIC node is defined.
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*/
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static int dt_pmic_i2c_config(struct dt_node_info *i2c_info,
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struct stm32_i2c_init_s *init)
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{
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static int i2c_node = -FDT_ERR_NOTFOUND;
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void *fdt;
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if (fdt_get_address(&fdt) == 0) {
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return -FDT_ERR_NOTFOUND;
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}
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if (i2c_node == -FDT_ERR_NOTFOUND) {
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int pmic_node;
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const fdt32_t *cuint;
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pmic_node = dt_get_pmic_node(fdt);
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if (pmic_node < 0) {
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return PMIC_NODE_NOT_FOUND;
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}
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cuint = fdt_getprop(fdt, pmic_node, "reg", NULL);
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if (cuint == NULL) {
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return -FDT_ERR_NOTFOUND;
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}
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pmic_i2c_addr = fdt32_to_cpu(*cuint) << 1;
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if (pmic_i2c_addr > UINT16_MAX) {
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return -FDT_ERR_BADVALUE;
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}
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i2c_node = fdt_parent_offset(fdt, pmic_node);
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if (i2c_node < 0) {
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return -FDT_ERR_NOTFOUND;
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}
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}
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dt_fill_device_info(i2c_info, i2c_node);
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if (i2c_info->base == 0U) {
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return -FDT_ERR_NOTFOUND;
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}
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return stm32_i2c_get_setup_from_fdt(fdt, i2c_node, init);
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}
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bool initialize_pmic_i2c(void)
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{
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int ret;
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struct dt_node_info i2c_info;
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struct i2c_handle_s *i2c = &i2c_handle;
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struct stm32_i2c_init_s i2c_init;
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ret = dt_pmic_i2c_config(&i2c_info, &i2c_init);
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if (ret < 0) {
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ERROR("I2C configuration failed %d\n", ret);
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panic();
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}
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if (ret != 0) {
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return false;
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}
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/* Initialize PMIC I2C */
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i2c->i2c_base_addr = i2c_info.base;
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i2c->dt_status = i2c_info.status;
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i2c->clock = i2c_info.clock;
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i2c->i2c_state = I2C_STATE_RESET;
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i2c_init.own_address1 = pmic_i2c_addr;
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i2c_init.addressing_mode = I2C_ADDRESSINGMODE_7BIT;
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i2c_init.dual_address_mode = I2C_DUALADDRESS_DISABLE;
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i2c_init.own_address2 = 0;
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i2c_init.own_address2_masks = I2C_OAR2_OA2NOMASK;
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i2c_init.general_call_mode = I2C_GENERALCALL_DISABLE;
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i2c_init.no_stretch_mode = I2C_NOSTRETCH_DISABLE;
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i2c_init.analog_filter = 1;
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i2c_init.digital_filter_coef = 0;
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ret = stm32_i2c_init(i2c, &i2c_init);
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if (ret != 0) {
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ERROR("Cannot initialize I2C %x (%d)\n",
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i2c->i2c_base_addr, ret);
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panic();
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}
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if (!stm32_i2c_is_device_ready(i2c, pmic_i2c_addr, 1,
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I2C_TIMEOUT_BUSY_MS)) {
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ERROR("I2C device not ready\n");
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panic();
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}
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stpmic1_bind_i2c(i2c, (uint16_t)pmic_i2c_addr);
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return true;
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}
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static void register_pmic_shared_peripherals(void)
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{
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uintptr_t i2c_base = i2c_handle.i2c_base_addr;
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if (dt_pmic_is_secure()) {
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stm32mp_register_secure_periph_iomem(i2c_base);
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} else {
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if (i2c_base != 0U) {
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stm32mp_register_non_secure_periph_iomem(i2c_base);
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}
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}
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}
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void initialize_pmic(void)
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{
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if (!initialize_pmic_i2c()) {
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VERBOSE("No PMIC\n");
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return;
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}
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register_pmic_shared_peripherals();
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if (register_pmic() < 0) {
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panic();
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}
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if (stpmic1_powerctrl_on() < 0) {
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panic();
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}
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}
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#if DEBUG
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void print_pmic_info_and_debug(void)
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{
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unsigned long pmic_version;
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if (stpmic1_get_version(&pmic_version) != 0) {
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ERROR("Failed to access PMIC\n");
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panic();
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}
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INFO("PMIC version = 0x%02lx\n", pmic_version);
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}
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#endif
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int pmic_ddr_power_init(enum ddr_type ddr_type)
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{
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int status;
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uint16_t buck3_min_mv;
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struct rdev *buck2, *buck3, *vref;
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struct rdev *ldo3 __unused;
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buck2 = regulator_get_by_name("buck2");
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if (buck2 == NULL) {
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return -ENOENT;
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}
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#if STM32MP15
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ldo3 = regulator_get_by_name("ldo3");
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if (ldo3 == NULL) {
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return -ENOENT;
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}
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#endif
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vref = regulator_get_by_name("vref_ddr");
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if (vref == NULL) {
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return -ENOENT;
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}
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switch (ddr_type) {
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case STM32MP_DDR3:
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#if STM32MP15
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status = regulator_set_flag(ldo3, REGUL_SINK_SOURCE);
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if (status != 0) {
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return status;
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}
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#endif
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status = regulator_set_min_voltage(buck2);
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if (status != 0) {
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return status;
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}
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status = regulator_enable(buck2);
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if (status != 0) {
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return status;
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}
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status = regulator_enable(vref);
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if (status != 0) {
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return status;
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}
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#if STM32MP15
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status = regulator_enable(ldo3);
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if (status != 0) {
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return status;
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}
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#endif
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break;
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case STM32MP_LPDDR2:
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case STM32MP_LPDDR3:
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/*
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* Set LDO3 to 1.8V
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* Set LDO3 to bypass mode if BUCK3 = 1.8V
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* Set LDO3 to normal mode if BUCK3 != 1.8V
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*/
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buck3 = regulator_get_by_name("buck3");
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if (buck3 == NULL) {
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return -ENOENT;
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}
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regulator_get_range(buck3, &buck3_min_mv, NULL);
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#if STM32MP15
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if (buck3_min_mv != 1800) {
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status = regulator_set_min_voltage(ldo3);
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if (status != 0) {
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return status;
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}
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} else {
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status = regulator_set_flag(ldo3, REGUL_ENABLE_BYPASS);
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if (status != 0) {
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return status;
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}
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}
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#endif
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status = regulator_set_min_voltage(buck2);
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if (status != 0) {
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return status;
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}
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#if STM32MP15
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status = regulator_enable(ldo3);
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if (status != 0) {
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return status;
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}
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#endif
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status = regulator_enable(buck2);
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if (status != 0) {
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return status;
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}
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status = regulator_enable(vref);
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if (status != 0) {
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return status;
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}
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break;
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default:
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break;
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};
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return 0;
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}
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int pmic_voltages_init(void)
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{
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#if STM32MP13
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struct rdev *buck1, *buck4;
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int status;
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buck1 = regulator_get_by_name("buck1");
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if (buck1 == NULL) {
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return -ENOENT;
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}
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buck4 = regulator_get_by_name("buck4");
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if (buck4 == NULL) {
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return -ENOENT;
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}
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status = regulator_set_min_voltage(buck1);
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if (status != 0) {
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return status;
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}
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status = regulator_set_min_voltage(buck4);
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if (status != 0) {
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return status;
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}
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#endif
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return 0;
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}
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enum {
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STPMIC1_BUCK1 = 0,
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STPMIC1_BUCK2,
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STPMIC1_BUCK3,
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STPMIC1_BUCK4,
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STPMIC1_LDO1,
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STPMIC1_LDO2,
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STPMIC1_LDO3,
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STPMIC1_LDO4,
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STPMIC1_LDO5,
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STPMIC1_LDO6,
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STPMIC1_VREF_DDR,
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STPMIC1_BOOST,
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STPMIC1_VBUS_OTG,
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STPMIC1_SW_OUT,
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};
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static int pmic_set_state(const struct regul_description *desc, bool enable)
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{
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VERBOSE("%s: set state to %d\n", desc->node_name, enable);
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if (enable == STATE_ENABLE) {
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return stpmic1_regulator_enable(desc->node_name);
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} else {
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return stpmic1_regulator_disable(desc->node_name);
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}
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}
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static int pmic_get_state(const struct regul_description *desc)
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{
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VERBOSE("%s: get state\n", desc->node_name);
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return stpmic1_is_regulator_enabled(desc->node_name);
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}
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static int pmic_get_voltage(const struct regul_description *desc)
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{
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VERBOSE("%s: get volt\n", desc->node_name);
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return stpmic1_regulator_voltage_get(desc->node_name);
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}
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static int pmic_set_voltage(const struct regul_description *desc, uint16_t mv)
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{
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VERBOSE("%s: get volt\n", desc->node_name);
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return stpmic1_regulator_voltage_set(desc->node_name, mv);
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}
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static int pmic_list_voltages(const struct regul_description *desc,
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const uint16_t **levels, size_t *count)
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{
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VERBOSE("%s: list volt\n", desc->node_name);
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return stpmic1_regulator_levels_mv(desc->node_name, levels, count);
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}
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static int pmic_set_flag(const struct regul_description *desc, uint16_t flag)
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{
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VERBOSE("%s: set_flag 0x%x\n", desc->node_name, flag);
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switch (flag) {
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case REGUL_OCP:
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return stpmic1_regulator_icc_set(desc->node_name);
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case REGUL_ACTIVE_DISCHARGE:
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return stpmic1_active_discharge_mode_set(desc->node_name);
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case REGUL_PULL_DOWN:
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return stpmic1_regulator_pull_down_set(desc->node_name);
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case REGUL_MASK_RESET:
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return stpmic1_regulator_mask_reset_set(desc->node_name);
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case REGUL_SINK_SOURCE:
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return stpmic1_regulator_sink_mode_set(desc->node_name);
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case REGUL_ENABLE_BYPASS:
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return stpmic1_regulator_bypass_mode_set(desc->node_name);
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default:
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return -EINVAL;
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}
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}
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static const struct regul_ops pmic_ops = {
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.set_state = pmic_set_state,
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.get_state = pmic_get_state,
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.set_voltage = pmic_set_voltage,
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.get_voltage = pmic_get_voltage,
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.list_voltages = pmic_list_voltages,
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.set_flag = pmic_set_flag,
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};
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#define DEFINE_REGU(name) { \
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.node_name = name, \
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.ops = &pmic_ops, \
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.driver_data = NULL, \
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.enable_ramp_delay = 1000, \
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}
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static const struct regul_description pmic_regs[] = {
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[STPMIC1_BUCK1] = DEFINE_REGU("buck1"),
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[STPMIC1_BUCK2] = DEFINE_REGU("buck2"),
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[STPMIC1_BUCK3] = DEFINE_REGU("buck3"),
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[STPMIC1_BUCK4] = DEFINE_REGU("buck4"),
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[STPMIC1_LDO1] = DEFINE_REGU("ldo1"),
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[STPMIC1_LDO2] = DEFINE_REGU("ldo2"),
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[STPMIC1_LDO3] = DEFINE_REGU("ldo3"),
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[STPMIC1_LDO4] = DEFINE_REGU("ldo4"),
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[STPMIC1_LDO5] = DEFINE_REGU("ldo5"),
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[STPMIC1_LDO6] = DEFINE_REGU("ldo6"),
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[STPMIC1_VREF_DDR] = DEFINE_REGU("vref_ddr"),
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[STPMIC1_BOOST] = DEFINE_REGU("boost"),
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[STPMIC1_VBUS_OTG] = DEFINE_REGU("pwr_sw1"),
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[STPMIC1_SW_OUT] = DEFINE_REGU("pwr_sw2"),
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};
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#define NB_REG ARRAY_SIZE(pmic_regs)
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static int register_pmic(void)
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{
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void *fdt;
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int pmic_node, regulators_node, subnode;
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VERBOSE("Register pmic\n");
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if (fdt_get_address(&fdt) == 0) {
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return -FDT_ERR_NOTFOUND;
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}
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pmic_node = dt_get_pmic_node(fdt);
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if (pmic_node < 0) {
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return pmic_node;
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}
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regulators_node = fdt_subnode_offset(fdt, pmic_node, "regulators");
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if (regulators_node < 0) {
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return -ENOENT;
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}
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fdt_for_each_subnode(subnode, fdt, regulators_node) {
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const char *reg_name = fdt_get_name(fdt, subnode, NULL);
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const struct regul_description *desc;
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unsigned int i;
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int ret;
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for (i = 0; i < NB_REG; i++) {
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desc = &pmic_regs[i];
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if (strcmp(desc->node_name, reg_name) == 0) {
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break;
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}
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}
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assert(i < NB_REG);
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ret = regulator_register(desc, subnode);
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if (ret != 0) {
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WARN("%s:%d failed to register %s\n", __func__,
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__LINE__, reg_name);
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return ret;
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}
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}
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return 0;
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}
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