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android_kernel_xiaomi_sm8350/drivers/bluetooth/btpower.c

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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2016-2021, The Linux Foundation. All rights reserved.
*/
/*
* Bluetooth Power Switch Module
* controls power to external Bluetooth device
* with interface to power management device
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/rfkill.h>
#include <linux/gpio.h>
#include <linux/of_gpio.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/regulator/consumer.h>
#include <linux/clk.h>
#include <linux/uaccess.h>
#include <linux/btpower.h>
#include <linux/of_device.h>
#include <soc/qcom/cmd-db.h>
#if defined CONFIG_BT_SLIM_QCA6390 || \
defined CONFIG_BT_SLIM_QCA6490 || \
defined CONFIG_BTFM_SLIM_WCN3990
#include "btfm_slim.h"
#endif
#include <linux/fs.h>
#define PWR_SRC_NOT_AVAILABLE -2
#define DEFAULT_INVALID_VALUE -1
#define PWR_SRC_INIT_STATE_IDX 0
#define XO_RESET_RETRY_COUNT_MAX 5
#define PWR_SRC_LOG_UNSUPPORTED {DEFAULT_INVALID_VALUE, DEFAULT_INVALID_VALUE}
enum power_src_pos {
BT_RESET_GPIO = PWR_SRC_INIT_STATE_IDX,
BT_SW_CTRL_GPIO,
BT_VDD_AON_LDO,
BT_VDD_DIG_LDO,
BT_VDD_RFA1_LDO,
BT_VDD_RFA2_LDO,
BT_VDD_ASD_LDO,
BT_VDD_XTAL_LDO,
BT_VDD_PA_LDO,
BT_VDD_CORE_LDO,
BT_VDD_IO_LDO,
BT_VDD_LDO,
BT_VDD_RFA_0p8,
BT_VDD_RFACMN,
// these indexes GPIOs/regs value are fetched during crash.
BT_RESET_GPIO_CURRENT,
BT_SW_CTRL_GPIO_CURRENT,
BT_VDD_AON_LDO_CURRENT,
BT_VDD_DIG_LDO_CURRENT,
BT_VDD_RFA1_LDO_CURRENT,
BT_VDD_RFA2_LDO_CURRENT,
BT_VDD_ASD_LDO_CURRENT,
BT_VDD_XTAL_LDO_CURRENT,
BT_VDD_PA_LDO_CURRENT,
BT_VDD_CORE_LDO_CURRENT,
BT_VDD_IO_LDO_CURRENT,
BT_VDD_LDO_CURRENT,
BT_VDD_RFA_0p8_CURRENT,
BT_VDD_RFACMN_CURRENT,
BT_VDD_IPA_2p2,
BT_VDD_IPA_2p2_CURRENT,
/* The below bucks are voted for HW WAR on some platform which supports
* WNC39xx.
*/
BT_VDD_SMPS,
BT_VDD_SMPS_CURRENT,
/* New entries need to be added before PWR_SRC_SIZE.
* Its hold the max size of power sources states.
*/
BT_POWER_SRC_SIZE,
};
#define PWR_SRC_STATUS_SET(index, status) do { \
if (index >= PWR_SRC_INIT_STATE_IDX && index < BT_POWER_SRC_SIZE) { \
bt_power_src_status[index] = (int) status; \
} \
} while (0)
// Regulator structure for QCA6174/QCA9377/QCA9379 BT SoC series
static struct bt_power_vreg_data bt_vregs_info_qca61x4_937x[] = {
{NULL, "qcom,bt-vdd-aon", 928000, 928000, 0, false, false,
{BT_VDD_AON_LDO, BT_VDD_AON_LDO_CURRENT}},
{NULL, "qcom,bt-vdd-io", 1710000, 3460000, 0, false, false,
{BT_VDD_IO_LDO, BT_VDD_IO_LDO_CURRENT}},
{NULL, "qcom,bt-vdd-core", 3135000, 3465000, 0, false, false,
{BT_VDD_CORE_LDO, BT_VDD_CORE_LDO_CURRENT}},
};
// Regulator structure for QCA6390,QCA6490 and WCN6750 BT SoC series
static struct bt_power_vreg_data bt_vregs_info_qca6xx0[] = {
{NULL, "qcom,bt-vdd-io", 1800000, 1800000, 0, false, true,
{BT_VDD_IO_LDO, BT_VDD_IO_LDO_CURRENT}},
{NULL, "qcom,bt-vdd-aon", 950000, 950000, 0, false, true,
{BT_VDD_AON_LDO, BT_VDD_AON_LDO_CURRENT}},
{NULL, "qcom,bt-vdd-rfacmn", 950000, 950000, 0, false, true,
{BT_VDD_RFACMN, BT_VDD_RFACMN_CURRENT}},
/* BT_CX_MX */
{NULL, "qcom,bt-vdd-dig", 950000, 952000, 0, false, true,
{BT_VDD_DIG_LDO, BT_VDD_DIG_LDO_CURRENT}},
{NULL, "qcom,bt-vdd-rfa-0p8", 950000, 952000, 0, false, true,
{BT_VDD_RFA_0p8, BT_VDD_RFA_0p8_CURRENT}},
{NULL, "qcom,bt-vdd-rfa1", 1900000, 1900000, 0, false, true,
{BT_VDD_RFA1_LDO, BT_VDD_RFA1_LDO_CURRENT}},
{NULL, "qcom,bt-vdd-rfa2", 1900000, 1900000, 0, false, true,
{BT_VDD_RFA2_LDO, BT_VDD_RFA2_LDO_CURRENT}},
{NULL, "qcom,bt-vdd-asd", 2800000, 2800000, 0, false, true,
{BT_VDD_ASD_LDO, BT_VDD_ASD_LDO_CURRENT}},
{NULL, "qcom,bt-vdd-ipa-2p2", 2200000, 2210000, 0, false, true,
{BT_VDD_IPA_2p2, BT_VDD_IPA_2p2_CURRENT}},
};
// Regulator structure for WCN399x BT SoC series
static struct bt_power bt_vreg_info_wcn399x = {
.compatible = "qcom,wcn3990",
.vregs = (struct bt_power_vreg_data []) {
{NULL, "qcom,bt-vdd-smps", 984000, 984000, 0, false, false,
{BT_VDD_SMPS, BT_VDD_SMPS_CURRENT}},
{NULL, "qcom,bt-vdd-io", 1700000, 1900000, 0, false, false,
{BT_VDD_IO_LDO, BT_VDD_IO_LDO_CURRENT}},
{NULL, "qcom,bt-vdd-core", 1304000, 1304000, 0, false, false,
{BT_VDD_CORE_LDO, BT_VDD_CORE_LDO_CURRENT}},
{NULL, "qcom,bt-vdd-pa", 3000000, 3312000, 0, false, false,
{BT_VDD_PA_LDO, BT_VDD_PA_LDO_CURRENT}},
{NULL, "qcom,bt-vdd-xtal", 1700000, 1900000, 0, false, false,
{BT_VDD_XTAL_LDO, BT_VDD_XTAL_LDO_CURRENT}},
},
.num_vregs = 5,
};
static struct bt_power bt_vreg_info_qca_auto = {
.compatible = "qcom,qca-auto-converged",
.vregs = (struct bt_power_vreg_data []) {
{NULL, "qcom,bt-vdd-ctrl1", 0, 0, 0, false, false,
PWR_SRC_LOG_UNSUPPORTED},
{NULL, "qcom,bt-vdd-ctrl2", 0, 0, 0, false, false,
PWR_SRC_LOG_UNSUPPORTED},
{NULL, "qcom,bt-vdd-aon", 1055000, 1055000, 0, false, false,
PWR_SRC_LOG_UNSUPPORTED},
{NULL, "qcom,bt-vdd-rfa1", 1370000, 1370000, 0, false, false,
PWR_SRC_LOG_UNSUPPORTED},
{NULL, "qcom,bt-vdd-rfa2", 2040000, 2040000, 0, false, false,
PWR_SRC_LOG_UNSUPPORTED},
{NULL, "qcom,bt-vdd-rfa3", 1900000, 1900000, 0, false, false,
PWR_SRC_LOG_UNSUPPORTED},
},
.num_vregs = 6,
};
static struct bt_power bt_vreg_info_qca6174 = {
.compatible = "qcom,qca6174",
.vregs = bt_vregs_info_qca61x4_937x,
.num_vregs = ARRAY_SIZE(bt_vregs_info_qca61x4_937x),
};
static struct bt_power bt_vreg_info_qca6390 = {
.compatible = "qcom,qca6390",
.vregs = bt_vregs_info_qca6xx0,
.num_vregs = ARRAY_SIZE(bt_vregs_info_qca6xx0),
};
static struct bt_power bt_vreg_info_qca6490 = {
.compatible = "qcom,qca6490",
.vregs = bt_vregs_info_qca6xx0,
.num_vregs = ARRAY_SIZE(bt_vregs_info_qca6xx0),
};
static struct bt_power bt_vreg_info_wcn6750 = {
.compatible = "qcom,wcn6750-bt",
.vregs = bt_vregs_info_qca6xx0,
.num_vregs = ARRAY_SIZE(bt_vregs_info_qca6xx0),
};
static const struct of_device_id bt_power_match_table[] = {
{ .compatible = "qcom,qca6174", .data = &bt_vreg_info_qca6174},
{ .compatible = "qcom,wcn3990", .data = &bt_vreg_info_wcn399x},
{ .compatible = "qcom,qca6390", .data = &bt_vreg_info_qca6390},
{ .compatible = "qcom,qca6490", .data = &bt_vreg_info_qca6490},
{ .compatible = "qcom,wcn6750-bt", .data = &bt_vreg_info_wcn6750},
{ .compatible = "qcom,qca-auto-converged", .data = &bt_vreg_info_qca_auto},
{},
};
static int bt_power_vreg_set(enum bt_power_modes mode);
static int btpower_get_tcs_table_info(struct platform_device *plat_dev,
struct bluetooth_power_platform_data *bt_power_pdata);
static int btpower_enable_ipa_vreg(struct platform_device *plat_dev,
struct bluetooth_power_platform_data *bt_power_pdata);
static int bt_power_src_status[BT_POWER_SRC_SIZE];
static struct bluetooth_power_platform_data *bt_power_pdata;
static struct platform_device *btpdev;
static bool previous;
static int pwr_state;
static struct class *bt_class;
static int bt_major;
static int soc_id;
static int bt_vreg_enable(struct bt_power_vreg_data *vreg)
{
int rc = 0;
pr_debug("%s: vreg_en for : %s\n", __func__, vreg->name);
if (!vreg->is_enabled) {
if ((vreg->min_vol != 0) && (vreg->max_vol != 0)) {
rc = regulator_set_voltage(vreg->reg,
vreg->min_vol,
vreg->max_vol);
if (rc < 0) {
pr_err("%s: regulator_set_voltage(%s) failed rc=%d\n",
__func__, vreg->name, rc);
goto out;
}
}
if (vreg->load_curr >= 0) {
rc = regulator_set_load(vreg->reg,
vreg->load_curr);
if (rc < 0) {
pr_err("%s: regulator_set_load(%s) failed rc=%d\n",
__func__, vreg->name, rc);
goto out;
}
}
rc = regulator_enable(vreg->reg);
if (rc < 0) {
pr_err("%s: regulator_enable(%s) failed. rc=%d\n",
__func__, vreg->name, rc);
goto out;
}
vreg->is_enabled = true;
}
out:
return rc;
}
static int bt_vreg_enable_retention(struct bt_power_vreg_data *vreg)
{
int rc = 0;
if (!vreg)
return rc;
pr_debug("%s: enable_retention for : %s\n", __func__, vreg->name);
if ((vreg->is_enabled) && (vreg->is_retention_supp)) {
if ((vreg->min_vol != 0) && (vreg->max_vol != 0)) {
/* Set the min voltage to 0 */
rc = regulator_set_voltage(vreg->reg, 0, vreg->max_vol);
if (rc < 0) {
pr_err("%s: regulator_set_voltage(%s) failed rc=%d\n",
__func__, vreg->name, rc);
goto out;
}
}
if (vreg->load_curr >= 0) {
rc = regulator_set_load(vreg->reg, 0);
if (rc < 0) {
pr_err("%s: regulator_set_load(%s) failed rc=%d\n",
__func__, vreg->name, rc);
}
}
}
out:
return rc;
}
static int bt_vreg_disable(struct bt_power_vreg_data *vreg)
{
int rc = 0;
if (!vreg)
return rc;
pr_debug("%s for : %s\n", __func__, vreg->name);
if (vreg->is_enabled) {
rc = regulator_disable(vreg->reg);
if (rc < 0) {
pr_err("%s, regulator_disable(%s) failed. rc=%d\n",
__func__, vreg->name, rc);
goto out;
}
vreg->is_enabled = false;
if ((vreg->min_vol != 0) && (vreg->max_vol != 0)) {
/* Set the min voltage to 0 */
rc = regulator_set_voltage(vreg->reg, 0,
vreg->max_vol);
if (rc < 0) {
pr_err("%s: regulator_set_voltage(%s) failed rc=%d\n",
__func__, vreg->name, rc);
goto out;
}
}
if (vreg->load_curr >= 0) {
rc = regulator_set_load(vreg->reg, 0);
if (rc < 0) {
pr_err("%s: regulator_set_load(%s) failed rc=%d\n",
__func__, vreg->name, rc);
}
}
}
out:
return rc;
}
static int bt_clk_enable(struct bt_power_clk_data *clk)
{
int rc = 0;
pr_debug("%s: %s\n", __func__, clk->name);
if (!clk->clk)
return -EINVAL;
/* Get the clock handle for vreg */
if (clk->is_enabled) {
pr_warning("%s: node: %p, clk->is_enabled:%d\n",
__func__, clk->clk, clk->is_enabled);
return 0;
}
rc = clk_prepare_enable(clk->clk);
if (rc) {
pr_err("%s: failed to enable %s, rc(%d)\n",
__func__, clk->name, rc);
return rc;
}
clk->is_enabled = true;
return rc;
}
static int bt_clk_disable(struct bt_power_clk_data *clk)
{
int rc = 0;
pr_debug("%s: %s\n", __func__, clk->name);
if (!clk->clk)
return -EINVAL;
/* Get the clock handle for vreg */
if (!clk->is_enabled) {
pr_warning("%s: node: %p, clk->is_enabled:%d\n",
__func__, clk->clk, clk->is_enabled);
return 0;
}
clk_disable_unprepare(clk->clk);
clk->is_enabled = false;
return rc;
}
static void btpower_set_xo_reset_gpio_state(bool enable)
{
int xo_reset_gpio = bt_power_pdata->xo_gpio_sys_rst;
int retry = 0;
int rc = 0;
if (xo_reset_gpio < 0)
return;
retry_gpio_req:
rc = gpio_request(xo_reset_gpio, "xo_reset_gpio_n");
if (rc) {
if (retry++ < XO_RESET_RETRY_COUNT_MAX) {
/* wait for ~(10 - 20) ms */
usleep_range(10000, 20000);
goto retry_gpio_req;
}
}
if (rc) {
pr_err("%s: unable to request XO reset gpio %d (%d)\n",
__func__, xo_reset_gpio, rc);
return;
}
if (enable) {
gpio_direction_output(xo_reset_gpio, 1);
/*XO CLK must be asserted for some time before BT_EN */
usleep_range(100, 200);
} else {
/* Assert XO CLK ~(2-5)ms before off for valid latch in HW */
usleep_range(2000, 5000);
gpio_direction_output(xo_reset_gpio, 0);
}
pr_info("%s:gpio(%d) success\n", __func__, xo_reset_gpio);
gpio_free(xo_reset_gpio);
}
static int bt_configure_gpios(int on)
{
int rc = 0;
int bt_reset_gpio = bt_power_pdata->bt_gpio_sys_rst;
int wl_reset_gpio = bt_power_pdata->wl_gpio_sys_rst;
int bt_sw_ctrl_gpio = bt_power_pdata->bt_gpio_sw_ctrl;
int bt_debug_gpio = bt_power_pdata->bt_gpio_debug;
int assert_dbg_gpio = 0;
if (on) {
rc = gpio_request(bt_reset_gpio, "bt_sys_rst_n");
if (rc) {
pr_err("%s: unable to request gpio %d (%d)\n",
__func__, bt_reset_gpio, rc);
return rc;
}
pr_info("BTON:Turn Bt OFF asserting BT_EN to low\n");
pr_info("bt-reset-gpio(%d) value(%d)\n", bt_reset_gpio,
gpio_get_value(bt_reset_gpio));
rc = gpio_direction_output(bt_reset_gpio, 0);
if (rc) {
pr_err("%s: Unable to set direction\n", __func__);
return rc;
}
PWR_SRC_STATUS_SET(BT_RESET_GPIO,
gpio_get_value(bt_reset_gpio));
msleep(50);
pr_info("BTON:Turn Bt OFF post asserting BT_EN to low\n");
pr_info("bt-reset-gpio(%d) value(%d)\n", bt_reset_gpio,
gpio_get_value(bt_reset_gpio));
if (bt_sw_ctrl_gpio >= 0) {
PWR_SRC_STATUS_SET(BT_SW_CTRL_GPIO,
gpio_get_value(bt_sw_ctrl_gpio));
pr_info("BTON:Turn Bt OFF bt-sw-ctrl-gpio(%d) value(%d)\n",
bt_sw_ctrl_gpio,
bt_power_src_status[BT_SW_CTRL_GPIO]);
}
if (wl_reset_gpio >= 0)
pr_info("BTON:Turn Bt ON wl-reset-gpio(%d) value(%d)\n",
wl_reset_gpio, gpio_get_value(wl_reset_gpio));
if ((wl_reset_gpio < 0) ||
((wl_reset_gpio >= 0) && gpio_get_value(wl_reset_gpio))) {
btpower_set_xo_reset_gpio_state(true);
pr_info("BTON: WLAN ON Asserting BT_EN to high\n");
rc = gpio_direction_output(bt_reset_gpio, 1);
if (rc) {
pr_err("%s: Unable to set direction\n", __func__);
return rc;
}
PWR_SRC_STATUS_SET(BT_RESET_GPIO,
gpio_get_value(bt_reset_gpio));
btpower_set_xo_reset_gpio_state(false);
}
if ((wl_reset_gpio >= 0) && (gpio_get_value(wl_reset_gpio) == 0)) {
if (gpio_get_value(bt_reset_gpio)) {
pr_info("BTON: WLAN OFF and BT ON are too close\n");
pr_info("reset BT_EN, enable it after delay\n");
rc = gpio_direction_output(bt_reset_gpio, 0);
if (rc) {
pr_err("%s: Unable to set direction\n",
__func__);
return rc;
}
PWR_SRC_STATUS_SET(BT_RESET_GPIO,
gpio_get_value(bt_reset_gpio));
}
pr_info("BTON: WLAN OFF waiting for 100ms delay\n");
pr_info("for AON output to fully discharge\n");
msleep(100);
pr_info("BTON: WLAN OFF Asserting BT_EN to high\n");
btpower_set_xo_reset_gpio_state(true);
rc = gpio_direction_output(bt_reset_gpio, 1);
if (rc) {
pr_err("%s: Unable to set direction\n", __func__);
return rc;
}
bt_power_src_status[BT_RESET_GPIO] =
gpio_get_value(bt_reset_gpio);
btpower_set_xo_reset_gpio_state(false);
}
/* Below block of code executes if WL_EN is pulled high when
* BT_EN is about to pull high. so above two if conditions are
* not executed.
*/
if (!gpio_get_value(bt_reset_gpio)) {
btpower_set_xo_reset_gpio_state(true);
pr_info("BTON: WLAN ON and BT ON are too close\n");
pr_info("Asserting BT_EN to high\n");
rc = gpio_direction_output(bt_reset_gpio, 1);
if (rc) {
pr_err("%s: Unable to set direction\n", __func__);
return rc;
}
PWR_SRC_STATUS_SET(BT_RESET_GPIO,
gpio_get_value(bt_reset_gpio));
btpower_set_xo_reset_gpio_state(false);
}
msleep(50);
/* Check if SW_CTRL is asserted */
if (bt_sw_ctrl_gpio >= 0) {
#ifndef CONFIG_ARCH_JLQ
rc = gpio_direction_input(bt_sw_ctrl_gpio);
if (rc) {
pr_err("%s:SWCTRL Dir Set Problem:%d\n",
__func__, rc);
} else if (!gpio_get_value(bt_sw_ctrl_gpio)) {
#else
if (!gpio_get_value(bt_sw_ctrl_gpio)) {
#endif
/* SW_CTRL not asserted, assert debug GPIO */
if (bt_debug_gpio >= 0)
assert_dbg_gpio = 1;
}
}
if (assert_dbg_gpio) {
rc = gpio_request(bt_debug_gpio, "bt_debug_n");
if (rc) {
pr_err("unable to request Debug Gpio\n");
} else {
rc = gpio_direction_output(bt_debug_gpio, 1);
if (rc)
pr_err("%s:Prob Set Debug-Gpio\n",
__func__);
}
}
pr_info("BTON:Turn Bt On bt-reset-gpio(%d) value(%d)\n",
bt_reset_gpio, gpio_get_value(bt_reset_gpio));
if (bt_sw_ctrl_gpio >= 0) {
PWR_SRC_STATUS_SET(BT_SW_CTRL_GPIO,
gpio_get_value(bt_sw_ctrl_gpio));
pr_info("BTON: Turn BT ON bt-sw-ctrl-gpio(%d) value(%d)\n",
bt_sw_ctrl_gpio,
bt_power_src_status[BT_SW_CTRL_GPIO]);
}
} else {
gpio_set_value(bt_reset_gpio, 0);
msleep(100);
pr_info("BT-OFF:bt-reset-gpio(%d) value(%d)\n",
bt_reset_gpio, gpio_get_value(bt_reset_gpio));
if (bt_sw_ctrl_gpio >= 0) {
pr_info("BT-OFF:bt-sw-ctrl-gpio(%d) value(%d)\n",
bt_sw_ctrl_gpio,
gpio_get_value(bt_sw_ctrl_gpio));
}
}
pr_info("%s: bt_gpio= %d on: %d\n", __func__, bt_reset_gpio, on);
return rc;
}
static int bluetooth_power(int on)
{
int rc = 0;
pr_debug("%s: on: %d\n", __func__, on);
if (on == 1) {
rc = bt_power_vreg_set(BT_POWER_ENABLE);
if (rc < 0) {
pr_err("%s: bt_power regulators config failed\n",
__func__);
goto regulator_fail;
}
/* Parse dt_info and check if a target requires clock voting.
* Enable BT clock when BT is on and disable it when BT is off
*/
if (bt_power_pdata->bt_chip_clk) {
rc = bt_clk_enable(bt_power_pdata->bt_chip_clk);
if (rc < 0) {
pr_err("%s: bt_power gpio config failed\n",
__func__);
goto clk_fail;
}
}
if (bt_power_pdata->bt_gpio_sys_rst > 0) {
PWR_SRC_STATUS_SET(BT_RESET_GPIO,
DEFAULT_INVALID_VALUE);
PWR_SRC_STATUS_SET(BT_SW_CTRL_GPIO,
DEFAULT_INVALID_VALUE);
rc = bt_configure_gpios(on);
if (rc < 0) {
pr_err("%s: bt_power gpio config failed\n",
__func__);
goto gpio_fail;
}
}
} else if (on == 0) {
// Power Off
if (bt_power_pdata->bt_gpio_sys_rst > 0)
bt_configure_gpios(on);
gpio_fail:
if (bt_power_pdata->bt_gpio_sys_rst > 0)
gpio_free(bt_power_pdata->bt_gpio_sys_rst);
if (bt_power_pdata->bt_gpio_debug > 0)
gpio_free(bt_power_pdata->bt_gpio_debug);
if (bt_power_pdata->bt_chip_clk)
bt_clk_disable(bt_power_pdata->bt_chip_clk);
clk_fail:
regulator_fail:
bt_power_vreg_set(BT_POWER_DISABLE);
} else if (on == 2) {
/* Retention mode */
bt_power_vreg_set(BT_POWER_RETENTION);
} else {
pr_err("%s: Invalid power mode: %d\n", __func__, on);
rc = -1;
}
return rc;
}
static int bluetooth_toggle_radio(void *data, bool blocked)
{
int ret = 0;
int (*power_control)(int enable);
power_control =
((struct bluetooth_power_platform_data *)data)->bt_power_setup;
if (previous != blocked)
ret = (*power_control)(!blocked);
if (!ret)
previous = blocked;
return ret;
}
static const struct rfkill_ops bluetooth_power_rfkill_ops = {
.set_block = bluetooth_toggle_radio,
};
static ssize_t extldo_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
return scnprintf(buf, 6, "false\n");
}
static DEVICE_ATTR_RO(extldo);
static int bluetooth_power_rfkill_probe(struct platform_device *pdev)
{
struct rfkill *rfkill;
int ret;
rfkill = rfkill_alloc("bt_power", &pdev->dev, RFKILL_TYPE_BLUETOOTH,
&bluetooth_power_rfkill_ops,
pdev->dev.platform_data);
if (!rfkill) {
dev_err(&pdev->dev, "rfkill allocate failed\n");
return -ENOMEM;
}
/* add file into rfkill0 to handle LDO27 */
ret = device_create_file(&pdev->dev, &dev_attr_extldo);
if (ret < 0)
pr_err("%s: device create file error\n", __func__);
/* force Bluetooth off during init to allow for user control */
rfkill_init_sw_state(rfkill, 1);
previous = true;
ret = rfkill_register(rfkill);
if (ret) {
dev_err(&pdev->dev, "rfkill register failed=%d\n", ret);
rfkill_destroy(rfkill);
return ret;
}
platform_set_drvdata(pdev, rfkill);
return 0;
}
static void bluetooth_power_rfkill_remove(struct platform_device *pdev)
{
struct rfkill *rfkill;
pr_debug("%s\n", __func__);
rfkill = platform_get_drvdata(pdev);
if (rfkill)
rfkill_unregister(rfkill);
rfkill_destroy(rfkill);
platform_set_drvdata(pdev, NULL);
}
#define MAX_PROP_SIZE 32
static int bt_dt_parse_vreg_info(struct device *dev,
struct bt_power_vreg_data *vreg_data)
{
int len, ret = 0;
const __be32 *prop;
char prop_name[MAX_PROP_SIZE];
struct bt_power_vreg_data *vreg = vreg_data;
struct device_node *np = dev->of_node;
const char *vreg_name = vreg_data->name;
pr_debug("%s: vreg dev tree parse for %s\n", __func__, vreg_name);
snprintf(prop_name, sizeof(prop_name), "%s-supply", vreg_name);
if (of_parse_phandle(np, prop_name, 0)) {
vreg->reg = regulator_get(dev, vreg_name);
if (IS_ERR(vreg->reg)) {
ret = PTR_ERR(vreg->reg);
vreg->reg = NULL;
pr_warn("%s: failed to get: %s error:%d\n", __func__,
vreg_name, ret);
return ret;
}
snprintf(prop_name, sizeof(prop_name), "%s-config", vreg->name);
prop = of_get_property(dev->of_node, prop_name, &len);
if (!prop || len != (4 * sizeof(__be32))) {
pr_debug("%s: Property %s %s, use default\n",
__func__, prop_name,
prop ? "invalid format" : "doesn't exist");
} else {
vreg->min_vol = be32_to_cpup(&prop[0]);
vreg->max_vol = be32_to_cpup(&prop[1]);
vreg->load_curr = be32_to_cpup(&prop[2]);
vreg->is_retention_supp = be32_to_cpup(&prop[3]);
}
pr_debug("%s: Got regulator: %s, min_vol: %u, max_vol: %u, load_curr: %u,is_retention_supp: %u\n",
__func__, vreg->name, vreg->min_vol, vreg->max_vol,
vreg->load_curr, vreg->is_retention_supp);
} else {
pr_info("%s: %s is not provided in device tree\n", __func__,
vreg_name);
}
return ret;
}
static int bt_dt_parse_clk_info(struct device *dev,
struct bt_power_clk_data **clk_data)
{
int ret = -EINVAL;
struct bt_power_clk_data *clk = NULL;
struct device_node *np = dev->of_node;
pr_debug("%s\n", __func__);
*clk_data = NULL;
if (of_parse_phandle(np, "clocks", 0)) {
clk = devm_kzalloc(dev, sizeof(*clk), GFP_KERNEL);
if (!clk) {
ret = -ENOMEM;
goto err;
}
/* Allocated 20 bytes size buffer for clock name string */
clk->name = devm_kzalloc(dev, 20, GFP_KERNEL);
/* Parse clock name from node */
ret = of_property_read_string_index(np, "clock-names", 0,
&(clk->name));
if (ret < 0) {
pr_err("%s: reading \"clock-names\" failed\n",
__func__);
return ret;
}
clk->clk = devm_clk_get(dev, clk->name);
if (IS_ERR(clk->clk)) {
ret = PTR_ERR(clk->clk);
pr_err("%s: failed to get %s, ret (%d)\n",
__func__, clk->name, ret);
clk->clk = NULL;
return ret;
}
*clk_data = clk;
} else {
pr_err("%s: clocks is not provided in device tree\n", __func__);
}
err:
return ret;
}
static int bt_power_vreg_get(struct platform_device *pdev)
{
int num_vregs, i = 0, ret = 0;
const struct bt_power *data;
data = of_device_get_match_data(&pdev->dev);
if (!data) {
pr_err("%s: failed to get dev node\n", __func__);
return -EINVAL;
}
memcpy(&bt_power_pdata->compatible, &data->compatible, MAX_PROP_SIZE);
bt_power_pdata->vreg_info = data->vregs;
num_vregs = bt_power_pdata->num_vregs = data->num_vregs;
for (; i < num_vregs; i++) {
ret = bt_dt_parse_vreg_info(&(pdev->dev),
&bt_power_pdata->vreg_info[i]);
/* No point to go further if failed to get regulator handler */
if (ret)
break;
}
return ret;
}
static int bt_power_vreg_set(enum bt_power_modes mode)
{
int num_vregs, i = 0, ret = 0;
int log_indx;
struct bt_power_vreg_data *vreg_info = NULL;
num_vregs = bt_power_pdata->num_vregs;
if (mode == BT_POWER_ENABLE) {
for (; i < num_vregs; i++) {
vreg_info = &bt_power_pdata->vreg_info[i];
log_indx = vreg_info->indx.init;
if (vreg_info->reg) {
PWR_SRC_STATUS_SET(log_indx,
DEFAULT_INVALID_VALUE);
ret = bt_vreg_enable(vreg_info);
if (ret < 0)
goto out;
if (vreg_info->is_enabled) {
PWR_SRC_STATUS_SET(log_indx,
regulator_get_voltage(
vreg_info->reg));
}
}
}
} else if (mode == BT_POWER_DISABLE) {
for (; i < num_vregs; i++) {
vreg_info = &bt_power_pdata->vreg_info[i];
ret = bt_vreg_disable(vreg_info);
}
} else if (mode == BT_POWER_RETENTION) {
for (; i < num_vregs; i++) {
vreg_info = &bt_power_pdata->vreg_info[i];
ret = bt_vreg_enable_retention(vreg_info);
}
} else {
pr_err("%s: Invalid power mode: %d\n", __func__, mode);
ret = -1;
}
out:
return ret;
}
static void bt_power_vreg_put(void)
{
int i = 0;
struct bt_power_vreg_data *vreg_info = NULL;
int num_vregs = bt_power_pdata->num_vregs;
for (; i < num_vregs; i++) {
vreg_info = &bt_power_pdata->vreg_info[i];
if (vreg_info->reg)
regulator_put(vreg_info->reg);
}
}
static int bt_disable_asd(void)
{
int rc = 0;
int i;
int num_vregs = bt_power_pdata->num_vregs;
struct bt_power_vreg_data *vreg_info = NULL;
pr_warn("%s: Checking for ASD regulator\n", __func__);
for (i = 0; i < num_vregs; i++) {
vreg_info = &bt_power_pdata->vreg_info[i];
if (strnstr(vreg_info->name, "bt-vdd-asd", strlen(vreg_info->name))) {
if (vreg_info->reg) {
pr_warn("%s: Disabling ASD regulator\n", __func__);
rc = bt_vreg_disable(vreg_info);
} else {
pr_warn("%s: ASD regulator is not configured\n", __func__);
}
break;
}
}
return rc;
}
static int bt_power_populate_dt_pinfo(struct platform_device *pdev)
{
int rc;
pr_debug("%s\n", __func__);
if (!bt_power_pdata)
return -ENOMEM;
if (pdev->dev.of_node) {
rc = bt_power_vreg_get(pdev);
if (rc)
return rc;
bt_power_pdata->bt_gpio_sys_rst =
of_get_named_gpio(pdev->dev.of_node,
"qcom,bt-reset-gpio", 0);
if (bt_power_pdata->bt_gpio_sys_rst < 0)
pr_warn("bt-reset-gpio not provided in devicetree\n");
bt_power_pdata->wl_gpio_sys_rst =
of_get_named_gpio(pdev->dev.of_node,
"qcom,wl-reset-gpio", 0);
if (bt_power_pdata->wl_gpio_sys_rst < 0)
pr_err("%s: wl-reset-gpio not provided in device tree\n",
__func__);
bt_power_pdata->bt_gpio_sw_ctrl =
of_get_named_gpio(pdev->dev.of_node,
"qcom,bt-sw-ctrl-gpio", 0);
if (bt_power_pdata->bt_gpio_sw_ctrl < 0)
pr_warn("bt-sw-ctrl-gpio not provided in devicetree\n");
bt_power_pdata->bt_gpio_debug =
of_get_named_gpio(pdev->dev.of_node,
"qcom,bt-debug-gpio", 0);
if (bt_power_pdata->bt_gpio_debug < 0)
pr_warn("bt-debug-gpio not provided in devicetree\n");
bt_power_pdata->xo_gpio_sys_rst =
of_get_named_gpio(pdev->dev.of_node,
"qcom,xo-reset-gpio", 0);
if (bt_power_pdata->xo_gpio_sys_rst < 0)
pr_warn("xo-reset-gpio not provided in devicetree\n");
rc = bt_dt_parse_clk_info(&pdev->dev,
&bt_power_pdata->bt_chip_clk);
if (rc < 0)
pr_warn("%s: clock not provided in device tree\n",
__func__);
}
bt_power_pdata->bt_power_setup = bluetooth_power;
return 0;
}
static int bt_power_probe(struct platform_device *pdev)
{
int ret = 0;
int itr;
pr_debug("%s\n", __func__);
/* Fill whole array with -2 i.e NOT_AVAILABLE state by default
* for any GPIO or Reg handle.
*/
for (itr = PWR_SRC_INIT_STATE_IDX;
itr < BT_POWER_SRC_SIZE; ++itr)
PWR_SRC_STATUS_SET(itr, PWR_SRC_NOT_AVAILABLE);
bt_power_pdata = kzalloc(sizeof(*bt_power_pdata), GFP_KERNEL);
if (!bt_power_pdata)
return -ENOMEM;
if (pdev->dev.of_node) {
ret = bt_power_populate_dt_pinfo(pdev);
if (ret < 0) {
pr_err("%s, Failed to populate device tree info\n",
__func__);
goto free_pdata;
}
pdev->dev.platform_data = bt_power_pdata;
} else if (pdev->dev.platform_data) {
/* Optional data set to default if not provided */
if (!((struct bluetooth_power_platform_data *)
(pdev->dev.platform_data))->bt_power_setup)
((struct bluetooth_power_platform_data *)
(pdev->dev.platform_data))->bt_power_setup =
bluetooth_power;
memcpy(bt_power_pdata, pdev->dev.platform_data,
sizeof(struct bluetooth_power_platform_data));
pwr_state = 0;
} else {
pr_err("%s: Failed to get platform data\n", __func__);
goto free_pdata;
}
if (bluetooth_power_rfkill_probe(pdev) < 0)
goto free_pdata;
btpdev = pdev;
if (btpower_get_tcs_table_info(pdev, bt_power_pdata) < 0)
pr_err("%s: Failed to get TCS table info\n", __func__);
return 0;
free_pdata:
kfree(bt_power_pdata);
return ret;
}
static int bt_power_remove(struct platform_device *pdev)
{
dev_dbg(&pdev->dev, "%s\n", __func__);
bluetooth_power_rfkill_remove(pdev);
bt_power_vreg_put();
kfree(bt_power_pdata);
return 0;
}
int btpower_register_slimdev(struct device *dev)
{
pr_debug("%s\n", __func__);
if (!bt_power_pdata || (dev == NULL)) {
pr_err("%s: Failed to allocate memory\n", __func__);
return -EINVAL;
}
bt_power_pdata->slim_dev = dev;
return 0;
}
EXPORT_SYMBOL(btpower_register_slimdev);
int btpower_get_chipset_version(void)
{
pr_debug("%s\n", __func__);
return soc_id;
}
EXPORT_SYMBOL(btpower_get_chipset_version);
static void set_pwr_srcs_status(struct bt_power_vreg_data *handle)
{
int ldo_index;
int ldo_vol;
if (handle) {
ldo_index = handle->indx.crash;
PWR_SRC_STATUS_SET(ldo_index, DEFAULT_INVALID_VALUE);
if (handle->is_enabled &&
(regulator_is_enabled(handle->reg))) {
ldo_vol = regulator_get_voltage(handle->reg);
PWR_SRC_STATUS_SET(ldo_index, ldo_vol);
pr_err("%s(%p) value(%d)\n", handle->name,
handle, ldo_vol);
} else {
pr_err("%s:%s is_enabled: %d\n",
__func__, handle->name,
handle->is_enabled);
}
}
}
static void set_gpios_srcs_status(char *gpio_name,
int gpio_index, int handle)
{
int gpio_val;
if (handle >= 0) {
gpio_val = gpio_get_value(handle);
PWR_SRC_STATUS_SET(gpio_index, gpio_val);
pr_err("%s(%d) value(%d)\n", gpio_name,
handle, gpio_val);
} else {
pr_err("%s: %s not configured\n",
__func__, gpio_name);
}
}
static long bt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
int ret = 0, pwr_cntrl = 0;
int chipset_version = 0;
int itr, num_vregs;
struct bt_power_vreg_data *vreg_info = NULL;
switch (cmd) {
case BT_CMD_SLIM_TEST:
#if (defined CONFIG_BT_SLIM_QCA6390 || \
defined CONFIG_BT_SLIM_QCA6490 || \
defined CONFIG_BTFM_SLIM_WCN3990)
if (!bt_power_pdata->slim_dev) {
pr_err("%s: slim_dev is null\n", __func__);
return -EINVAL;
}
ret = btfm_slim_hw_init(
bt_power_pdata->slim_dev->platform_data
);
#endif
break;
case BT_CMD_PWR_CTRL:
pwr_cntrl = (int)arg;
pr_warn("%s: BT_CMD_PWR_CTRL pwr_cntrl: %d\n",
__func__, pwr_cntrl);
if (pwr_state != pwr_cntrl) {
ret = bluetooth_power(pwr_cntrl);
if (!ret)
pwr_state = pwr_cntrl;
} else {
pr_err("%s: BT chip state is already: %d no change\n",
__func__, pwr_state);
ret = 0;
}
break;
case BT_CMD_CHIPSET_VERS:
chipset_version = (int)arg;
pr_warn("%s: unified Current SOC Version : %x\n", __func__,
chipset_version);
if (chipset_version) {
soc_id = chipset_version;
if (soc_id == HASTINGS_SOC_ID_0100 ||
soc_id == HASTINGS_SOC_ID_0101 ||
soc_id == HASTINGS_SOC_ID_0110 ||
soc_id == HASTINGS_SOC_ID_0200) {
ret = bt_disable_asd();
if (ret >= 0)
PWR_SRC_STATUS_SET(BT_VDD_ASD_LDO, PWR_SRC_NOT_AVAILABLE);
}
} else {
pr_err("%s: got invalid soc version\n", __func__);
soc_id = 0;
}
break;
case BT_CMD_GET_CHIPSET_ID:
if (copy_to_user((void __user *)arg, bt_power_pdata->compatible,
MAX_PROP_SIZE)) {
pr_err("%s: copy to user failed\n", __func__);
ret = -EFAULT;
}
break;
case BT_CMD_CHECK_SW_CTRL:
/* Check if SW_CTRL is asserted */
pr_info("BT_CMD_CHECK_SW_CTRL\n");
if (bt_power_pdata->bt_gpio_sw_ctrl > 0) {
#ifndef CONFIG_ARCH_JLQ
PWR_SRC_STATUS_SET(BT_SW_CTRL_GPIO,
DEFAULT_INVALID_VALUE);
ret = gpio_direction_input(
bt_power_pdata->bt_gpio_sw_ctrl);
if (ret) {
pr_err("%s:gpio_direction_input api\n",
__func__);
pr_err("%s:failed for SW_CTRL:%d\n",
__func__, ret);
} else
#endif
{
PWR_SRC_STATUS_SET(BT_SW_CTRL_GPIO,
gpio_get_value(
bt_power_pdata->bt_gpio_sw_ctrl));
pr_info("bt-sw-ctrl-gpio(%d) value(%d)\n",
bt_power_pdata->bt_gpio_sw_ctrl,
bt_power_src_status[BT_SW_CTRL_GPIO]);
}
} else {
pr_err("bt_gpio_sw_ctrl not configured\n");
return -EINVAL;
}
break;
case BT_CMD_GETVAL_POWER_SRCS:
pr_err("BT_CMD_GETVAL_POWER_SRCS\n");
set_gpios_srcs_status("BT_RESET_GPIO", BT_RESET_GPIO_CURRENT,
bt_power_pdata->bt_gpio_sys_rst);
set_gpios_srcs_status("SW_CTRL_GPIO", BT_SW_CTRL_GPIO_CURRENT,
bt_power_pdata->bt_gpio_sw_ctrl);
num_vregs = bt_power_pdata->num_vregs;
for (itr = 0; itr < num_vregs; itr++) {
vreg_info = &bt_power_pdata->vreg_info[itr];
set_pwr_srcs_status(vreg_info);
}
if (copy_to_user((void __user *)arg,
bt_power_src_status, sizeof(bt_power_src_status))) {
pr_err("%s: copy to user failed\n", __func__);
ret = -EFAULT;
}
break;
case BT_CMD_SET_IPA_TCS_INFO:
pr_err("%s: BT_CMD_SET_IPA_TCS_INFO\n", __func__);
btpower_enable_ipa_vreg(btpdev, bt_power_pdata);
break;
default:
return -ENOIOCTLCMD;
}
return ret;
}
static struct platform_driver bt_power_driver = {
.probe = bt_power_probe,
.remove = bt_power_remove,
.driver = {
.name = "bt_power",
.of_match_table = bt_power_match_table,
},
};
static const struct file_operations bt_dev_fops = {
.unlocked_ioctl = bt_ioctl,
.compat_ioctl = bt_ioctl,
};
static int __init bluetooth_power_init(void)
{
int ret = 0;
ret = platform_driver_register(&bt_power_driver);
if (ret) {
pr_err("%s: platform_driver_register error: %d\n",
__func__, ret);
goto driver_err;
}
bt_major = register_chrdev(0, "bt", &bt_dev_fops);
if (bt_major < 0) {
pr_err("%s: failed to allocate char dev\n", __func__);
ret = -1;
goto chrdev_err;
}
bt_class = class_create(THIS_MODULE, "bt-dev");
if (IS_ERR(bt_class)) {
pr_err("%s: coudn't create class\n", __func__);
ret = -1;
goto class_err;
}
if (device_create(bt_class, NULL, MKDEV(bt_major, 0),
NULL, "btpower") == NULL) {
pr_err("%s: failed to allocate char dev\n", __func__);
goto device_err;
}
return 0;
device_err:
class_destroy(bt_class);
class_err:
unregister_chrdev(bt_major, "bt");
chrdev_err:
platform_driver_unregister(&bt_power_driver);
driver_err:
return ret;
}
static int btpower_get_tcs_table_info(struct platform_device *dev,
struct bluetooth_power_platform_data *bt_power_pdata)
{
struct platform_device *plat_dev = dev;
struct btpower_tcs_table_info *tcs_table_info =
&bt_power_pdata->tcs_table_info;
struct resource *res;
resource_size_t addr_len;
void __iomem *tcs_cmd_base_addr;
int ret = -1;
res = platform_get_resource_byname(plat_dev, IORESOURCE_MEM, "tcs_cmd");
if (!res) {
pr_err("No TCS CMD entry found in DTSI\n");
goto out;
}
tcs_table_info->tcs_cmd_base_addr = res->start;
addr_len = resource_size(res);
pr_info("TCS CMD base address is %pa with length %pa\n",
&tcs_table_info->tcs_cmd_base_addr, &addr_len);
tcs_cmd_base_addr = devm_ioremap(&plat_dev->dev, res->start, addr_len);
if (!tcs_cmd_base_addr) {
ret = -EINVAL;
pr_err("Failed to map TCS CMD address, err = %d\n",
ret);
goto out;
}
tcs_table_info->tcs_cmd_base_addr_io = tcs_cmd_base_addr;
return 0;
out:
return ret;
}
static int btpower_enable_ipa_vreg(struct platform_device *dev,
struct bluetooth_power_platform_data *bt_power_pdata)
{
struct platform_device *plat_dev = dev;
struct btpower_tcs_table_info *tcs_table_info =
&bt_power_pdata->tcs_table_info;
u32 offset, addr_val, data_val;
void __iomem *tcs_cmd;
int ret = 0;
if (!tcs_table_info->tcs_cmd_base_addr_io) {
pr_err("TCS command not configured\n");
return -EINVAL;
}
ret = of_property_read_u32(plat_dev->dev.of_node,
"qcom,tcs_offset_ipa",
&offset);
if (ret) {
pr_err("iPA failed to configure\n");
return -EINVAL;
}
tcs_cmd = tcs_table_info->tcs_cmd_base_addr_io + offset;
addr_val = readl_relaxed(tcs_cmd);
tcs_cmd += TCS_CMD_IO_ADDR_OFFSET;
writel_relaxed(1, tcs_cmd);
data_val = readl_relaxed(tcs_cmd);
pr_info("Configure S3E TCS Addr for iPA: %x with Data: %d\n"
, addr_val, data_val);
return 0;
}
static void __exit bluetooth_power_exit(void)
{
platform_driver_unregister(&bt_power_driver);
}
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("MSM Bluetooth power control driver");
module_init(bluetooth_power_init);
module_exit(bluetooth_power_exit);
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