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M7350/kernel/drivers/thermal/lmh_lite.c

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M7350v5_en_gpl
2024-09-09 08:57:42 +00:00
/* Copyright (c) 2014-2015, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#define pr_fmt(fmt) "%s:%s " fmt, KBUILD_MODNAME, __func__
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/workqueue.h>
#include <linux/kernel.h>
#include <linux/io.h>
#include <linux/err.h>
#include <linux/of.h>
#include <linux/mutex.h>
#include "lmh_interface.h"
#include <linux/slab.h>
#include <asm/cacheflush.h>
#include <soc/qcom/scm.h>
#include <linux/dma-mapping.h>
#include <linux/regulator/consumer.h>
#define CREATE_TRACE_POINTS
#define TRACE_MSM_LMH
#include <trace/trace_thermal.h>
#define LMH_DRIVER_NAME "lmh-lite-driver"
#define LMH_INTERRUPT "lmh-interrupt"
#define LMH_DEVICE "lmh-profile"
#define LMH_MAX_SENSOR 10
#define LMH_GET_PROFILE_SIZE 10
#define LMH_SCM_PAYLOAD_SIZE 10
#define LMH_DEFAULT_PROFILE 0
#define LMH_DEBUG_READ_TYPE 0x0
#define LMH_DEBUG_CONFIG_TYPE 0x1
#define LMH_CHANGE_PROFILE 0x01
#define LMH_GET_PROFILES 0x02
#define LMH_CTRL_QPMDA 0x03
#define LMH_TRIM_ERROR 0x04
#define LMH_GET_INTENSITY 0x06
#define LMH_GET_SENSORS 0x07
#define LMH_DEBUG_SET 0x08
#define LMH_DEBUG_READ_BUF_SIZE 0x09
#define LMH_DEBUG_READ 0x0A
#define LMH_DEBUG_GET_TYPE 0x0B
#define MAX_TRACE_EVENT_MSG_LEN 50
#define APCS_DPM_VOLTAGE_SCALE 0x09950804
#define LMH_ODCM_MAX_COUNT 6
#define LMH_CHECK_SCM_CMD(_cmd) \
do { \
if (!scm_is_call_available(SCM_SVC_LMH, _cmd)) { \
pr_err("SCM cmd:%d not available\n", _cmd); \
return -ENODEV; \
} \
} while (0)
#define LMH_GET_RECURSSIVE_DATA(desc_arg, cmd_idx, cmd_buf, payload, next, \
size, cmd_id, dest_buf, ret) \
do { \
int idx = 0; \
desc_arg.args[cmd_idx] = cmd_buf.list_start = next; \
trace_lmh_event_call("GET_TYPE enter"); \
dmac_flush_range(payload, payload + sizeof(uint32_t) * \
LMH_SCM_PAYLOAD_SIZE); \
if (!is_scm_armv8()) { \
ret = scm_call(SCM_SVC_LMH, cmd_id, \
(void *) &cmd_buf, SCM_BUFFER_SIZE(cmd_buf), \
&size, SCM_BUFFER_SIZE(size)); \
} else { \
ret = scm_call2(SCM_SIP_FNID(SCM_SVC_LMH, \
cmd_id), &desc_arg); \
size = desc_arg.ret[0]; \
} \
/* Have barrier before reading from TZ data */ \
mb(); \
trace_lmh_event_call("GET_TYPE exit"); \
if (ret) { \
pr_err("Error in SCM v%d get type. cmd:%x err:%d\n", \
(is_scm_armv8()) ? 8 : 7, cmd_id, ret); \
break; \
} \
if (!size) { \
pr_err("No LMH device supported.\n"); \
ret = -ENODEV; \
break; \
} \
if (!dest_buf) { \
dest_buf = devm_kzalloc(lmh_data->dev, \
sizeof(uint32_t) * size, GFP_KERNEL); \
if (!dest_buf) { \
ret = -ENOMEM; \
break; \
} \
} \
for (idx = next; \
idx < min((next + LMH_SCM_PAYLOAD_SIZE), size); \
idx++) \
dest_buf[idx] = payload[idx - next]; \
next += LMH_SCM_PAYLOAD_SIZE; \
} while (next < size) \
struct __attribute__((__packed__)) lmh_sensor_info {
uint32_t name;
uint32_t node_id;
uint32_t intensity;
uint32_t max_intensity;
uint32_t type;
};
struct __attribute__((__packed__)) lmh_sensor_packet {
uint32_t count;
struct lmh_sensor_info sensor[LMH_MAX_SENSOR];
};
struct lmh_profile {
struct lmh_device_ops dev_ops;
uint32_t level_ct;
uint32_t curr_level;
uint32_t *levels;
uint32_t read_type_count;
uint32_t config_type_count;
};
struct lmh_debug {
struct lmh_debug_ops debug_ops;
uint32_t *read_type;
uint32_t *config_type;
uint32_t read_type_count;
uint32_t config_type_count;
};
struct lmh_driver_data {
struct device *dev;
struct workqueue_struct *poll_wq;
struct delayed_work poll_work;
uint32_t log_enabled;
uint32_t log_delay;
enum lmh_monitor_state intr_state;
uint32_t intr_reg_val;
uint32_t intr_status_val;
uint32_t trim_err_offset;
bool trim_err_disable;
void *intr_addr;
int irq_num;
int max_sensor_count;
struct lmh_profile dev_info;
struct lmh_debug debug_info;
struct regulator *regulator;
struct notifier_block dpm_notifier_blk;
void __iomem *dpm_voltage_scale_reg;
uint32_t odcm_thresh_mV;
void __iomem *odcm_reg[LMH_ODCM_MAX_COUNT];
bool odcm_enabled;
};
struct lmh_sensor_data {
char sensor_name[LMH_NAME_MAX];
uint32_t sensor_hw_name;
uint32_t sensor_hw_node_id;
int sensor_sw_id;
struct lmh_sensor_ops ops;
long last_read_value;
struct list_head list_ptr;
};
struct lmh_default_data {
uint32_t default_profile;
uint32_t odcm_reg_addr[LMH_ODCM_MAX_COUNT];
};
static struct lmh_default_data lmh_lite_data = {
.default_profile = 0,
};
static struct lmh_default_data lmh_v1_data = {
.default_profile = 1,
.odcm_reg_addr = { 0x09981030, /* CPU0 */
0x09991030, /* CPU1 */
0x099A1028, /* APC0_L2 */
0x099B1030, /* CPU2 */
0x099C1030, /* CPU3 */
0x099D1028, /* APC1_l2 */
},
};
static struct lmh_default_data *lmh_hw_data;
static struct lmh_driver_data *lmh_data;
static DECLARE_RWSEM(lmh_sensor_access);
static DEFINE_MUTEX(lmh_sensor_read);
static DEFINE_MUTEX(lmh_odcm_access);
static LIST_HEAD(lmh_sensor_list);
static int lmh_read(struct lmh_sensor_ops *ops, long *val)
{
struct lmh_sensor_data *lmh_sensor = container_of(ops,
struct lmh_sensor_data, ops);
mutex_lock(&lmh_sensor_read);
*val = lmh_sensor->last_read_value;
mutex_unlock(&lmh_sensor_read);
return 0;
}
static int lmh_ctrl_qpmda(uint32_t enable)
{
int ret = 0;
struct scm_desc desc_arg;
struct {
uint32_t enable;
uint32_t rate;
} cmd_buf;
desc_arg.args[0] = cmd_buf.enable = enable;
desc_arg.args[1] = cmd_buf.rate = lmh_data->log_delay;
desc_arg.arginfo = SCM_ARGS(2, SCM_VAL, SCM_VAL);
trace_lmh_event_call("CTRL_QPMDA enter");
if (!is_scm_armv8())
ret = scm_call(SCM_SVC_LMH, LMH_CTRL_QPMDA,
(void *) &cmd_buf, SCM_BUFFER_SIZE(cmd_buf), NULL, 0);
else
ret = scm_call2(SCM_SIP_FNID(SCM_SVC_LMH,
LMH_CTRL_QPMDA), &desc_arg);
trace_lmh_event_call("CTRL_QPMDA exit");
if (ret) {
pr_err("Error in SCM v%d %s QPMDA call. err:%d\n",
(is_scm_armv8()) ? 8 : 7, (enable) ? "enable" :
"disable", ret);
goto ctrl_exit;
}
ctrl_exit:
return ret;
}
static int lmh_disable_log(void)
{
int ret = 0;
if (!lmh_data->log_enabled)
return ret;
ret = lmh_ctrl_qpmda(0);
if (ret)
goto disable_exit;
pr_debug("LMH hardware log disabled.\n");
lmh_data->log_enabled = 0;
disable_exit:
return ret;
}
static int lmh_enable_log(uint32_t delay, uint32_t reg_val)
{
int ret = 0;
if (lmh_data->log_enabled == reg_val && lmh_data->log_delay == delay)
return ret;
lmh_data->log_delay = delay;
ret = lmh_ctrl_qpmda(reg_val);
if (ret)
goto enable_exit;
pr_debug("LMH hardware log enabled[%u]. delay:%u\n", reg_val, delay);
lmh_data->log_enabled = reg_val;
enable_exit:
return ret;
}
static void lmh_update(struct lmh_driver_data *lmh_dat,
struct lmh_sensor_data *lmh_sensor)
{
if (lmh_sensor->last_read_value > 0 && !(lmh_dat->intr_status_val
& BIT(lmh_sensor->sensor_sw_id))) {
pr_debug("Sensor:[%s] interrupt triggered\n",
lmh_sensor->sensor_name);
trace_lmh_sensor_interrupt(lmh_sensor->sensor_name,
lmh_sensor->last_read_value);
lmh_dat->intr_status_val |= BIT(lmh_sensor->sensor_sw_id);
} else if (lmh_sensor->last_read_value == 0 && (lmh_dat->intr_status_val
& BIT(lmh_sensor->sensor_sw_id))) {
pr_debug("Sensor:[%s] interrupt clear\n",
lmh_sensor->sensor_name);
trace_lmh_sensor_interrupt(lmh_sensor->sensor_name,
lmh_sensor->last_read_value);
lmh_data->intr_status_val ^= BIT(lmh_sensor->sensor_sw_id);
}
lmh_sensor->ops.new_value_notify(&lmh_sensor->ops,
lmh_sensor->last_read_value);
}
static void lmh_read_and_update(struct lmh_driver_data *lmh_dat)
{
int ret = 0, idx = 0;
struct lmh_sensor_data *lmh_sensor = NULL;
static struct lmh_sensor_packet payload;
struct scm_desc desc_arg;
struct {
/* TZ is 32-bit right now */
uint32_t addr;
uint32_t size;
} cmd_buf;
mutex_lock(&lmh_sensor_read);
list_for_each_entry(lmh_sensor, &lmh_sensor_list, list_ptr)
lmh_sensor->last_read_value = 0;
payload.count = 0;
cmd_buf.addr = SCM_BUFFER_PHYS(&payload);
/* &payload may be a physical address > 4 GB */
desc_arg.args[0] = SCM_BUFFER_PHYS(&payload);
desc_arg.args[1] = cmd_buf.size
= SCM_BUFFER_SIZE(struct lmh_sensor_packet);
desc_arg.arginfo = SCM_ARGS(2, SCM_RW, SCM_VAL);
trace_lmh_event_call("GET_INTENSITY enter");
dmac_flush_range(&payload, &payload + sizeof(struct lmh_sensor_packet));
if (!is_scm_armv8())
ret = scm_call(SCM_SVC_LMH, LMH_GET_INTENSITY,
(void *) &cmd_buf, SCM_BUFFER_SIZE(cmd_buf), NULL, 0);
else
ret = scm_call2(SCM_SIP_FNID(SCM_SVC_LMH,
LMH_GET_INTENSITY), &desc_arg);
/* Have memory barrier before we access the TZ data */
mb();
trace_lmh_event_call("GET_INTENSITY exit");
if (ret) {
pr_err("Error in SCM v%d read call. err:%d\n",
(is_scm_armv8()) ? 8 : 7, ret);
goto read_exit;
}
for (idx = 0; idx < payload.count; idx++) {
list_for_each_entry(lmh_sensor, &lmh_sensor_list, list_ptr) {
if (payload.sensor[idx].name
== lmh_sensor->sensor_hw_name
&& (payload.sensor[idx].node_id
== lmh_sensor->sensor_hw_node_id)) {
lmh_sensor->last_read_value =
(payload.sensor[idx].max_intensity) ?
((payload.sensor[idx].intensity * 100)
/ payload.sensor[idx].max_intensity)
: payload.sensor[idx].intensity;
trace_lmh_sensor_reading(
lmh_sensor->sensor_name,
lmh_sensor->last_read_value);
break;
}
}
}
read_exit:
mutex_unlock(&lmh_sensor_read);
list_for_each_entry(lmh_sensor, &lmh_sensor_list, list_ptr)
lmh_update(lmh_dat, lmh_sensor);
return;
}
static void lmh_poll(struct work_struct *work)
{
struct lmh_driver_data *lmh_dat = container_of(work,
struct lmh_driver_data, poll_work.work);
down_write(&lmh_sensor_access);
if (lmh_dat->intr_state != LMH_ISR_POLLING)
goto poll_exit;
lmh_read_and_update(lmh_dat);
if (!lmh_data->intr_status_val) {
lmh_data->intr_state = LMH_ISR_MONITOR;
pr_debug("Zero throttling. Re-enabling interrupt\n");
trace_lmh_event_call("Lmh Interrupt Clear");
enable_irq(lmh_data->irq_num);
goto poll_exit;
} else {
queue_delayed_work(lmh_dat->poll_wq, &lmh_dat->poll_work,
msecs_to_jiffies(lmh_get_poll_interval()));
}
poll_exit:
up_write(&lmh_sensor_access);
return;
}
static void lmh_trim_error(void)
{
struct scm_desc desc_arg;
int ret = 0;
WARN_ON(1);
pr_err("LMH hardware trim error\n");
desc_arg.arginfo = SCM_ARGS(0);
trace_lmh_event_call("TRIM_ERROR enter");
if (!is_scm_armv8())
ret = scm_call(SCM_SVC_LMH, LMH_TRIM_ERROR, NULL, 0, NULL, 0);
else
ret = scm_call2(SCM_SIP_FNID(SCM_SVC_LMH,
LMH_TRIM_ERROR), &desc_arg);
trace_lmh_event_call("TRIM_ERROR exit");
if (ret)
pr_err("Error in SCM v%d trim error call. err:%d\n",
(is_scm_armv8()) ? 8 : 7, ret);
return;
}
static irqreturn_t lmh_isr_thread(int irq, void *data)
{
struct lmh_driver_data *lmh_dat = data;
pr_debug("LMH Interrupt triggered\n");
trace_lmh_event_call("Lmh Interrupt");
disable_irq_nosync(irq);
down_write(&lmh_sensor_access);
if (lmh_dat->intr_state != LMH_ISR_MONITOR) {
pr_err("Invalid software state\n");
trace_lmh_event_call("Invalid software state");
WARN_ON(1);
goto isr_unlock_exit;
}
lmh_dat->intr_state = LMH_ISR_POLLING;
if (!lmh_data->trim_err_disable) {
lmh_dat->intr_reg_val = readl_relaxed(lmh_dat->intr_addr);
pr_debug("Lmh hw interrupt:%d\n", lmh_dat->intr_reg_val);
if (lmh_dat->intr_reg_val & BIT(lmh_dat->trim_err_offset)) {
trace_lmh_event_call("Lmh trim error");
lmh_trim_error();
lmh_dat->intr_state = LMH_ISR_MONITOR;
goto decide_next_action;
}
}
lmh_read_and_update(lmh_dat);
if (!lmh_dat->intr_status_val) {
pr_debug("LMH not throttling. Enabling interrupt\n");
lmh_dat->intr_state = LMH_ISR_MONITOR;
trace_lmh_event_call("Lmh Zero throttle Interrupt Clear");
goto decide_next_action;
}
decide_next_action:
if (lmh_dat->intr_state == LMH_ISR_POLLING)
queue_delayed_work(lmh_dat->poll_wq, &lmh_dat->poll_work,
msecs_to_jiffies(lmh_get_poll_interval()));
else
enable_irq(lmh_dat->irq_num);
isr_unlock_exit:
up_write(&lmh_sensor_access);
return IRQ_HANDLED;
}
static int lmh_get_sensor_devicetree(struct platform_device *pdev)
{
int ret = 0, idx = 0;
char *key = NULL;
struct device_node *node = pdev->dev.of_node;
struct resource *lmh_intr_base = NULL;
lmh_data->trim_err_disable = false;
key = "qcom,lmh-trim-err-offset";
ret = of_property_read_u32(node, key,
&lmh_data->trim_err_offset);
if (ret) {
if (ret == -EINVAL) {
lmh_data->trim_err_disable = true;
ret = 0;
} else {
pr_err("Error reading:%s. err:%d\n", key, ret);
goto dev_exit;
}
}
lmh_data->regulator = devm_regulator_get(lmh_data->dev, "vdd-apss");
if (IS_ERR(lmh_data->regulator)) {
pr_err("unable to get vdd-apss regulator. err:%ld\n",
PTR_ERR(lmh_data->regulator));
lmh_data->regulator = NULL;
} else {
key = "qcom,lmh-odcm-disable-threshold-mA";
ret = of_property_read_u32(node, key,
&lmh_data->odcm_thresh_mV);
if (ret) {
pr_err("Error getting ODCM thresh. err:%d\n", ret);
ret = 0;
} else {
lmh_data->odcm_enabled = true;
for (; idx < LMH_ODCM_MAX_COUNT; idx++) {
lmh_data->odcm_reg[idx] =
devm_ioremap(&pdev->dev,
lmh_hw_data->odcm_reg_addr[idx], 4);
if (!lmh_data->odcm_reg[idx]) {
pr_err("Err mapping ODCM memory 0x%x\n",
lmh_hw_data->odcm_reg_addr[idx]);
lmh_data->odcm_enabled = false;
lmh_data->odcm_reg[0] = NULL;
break;
}
}
}
}
lmh_data->irq_num = platform_get_irq(pdev, 0);
if (lmh_data->irq_num < 0) {
ret = lmh_data->irq_num;
pr_err("Error getting IRQ number. err:%d\n", ret);
goto dev_exit;
}
ret = request_threaded_irq(lmh_data->irq_num, NULL,
lmh_isr_thread, IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
LMH_INTERRUPT, lmh_data);
if (ret) {
pr_err("Error getting irq for LMH. err:%d\n", ret);
goto dev_exit;
}
if (!lmh_data->trim_err_disable) {
lmh_intr_base = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!lmh_intr_base) {
ret = -EINVAL;
pr_err("Error getting reg MEM for LMH.\n");
goto dev_exit;
}
lmh_data->intr_addr =
devm_ioremap(&pdev->dev, lmh_intr_base->start,
resource_size(lmh_intr_base));
if (!lmh_data->intr_addr) {
ret = -ENODEV;
pr_err("Error Mapping LMH memory address\n");
goto dev_exit;
}
}
dev_exit:
return ret;
}
static void lmh_remove_sensors(void)
{
struct lmh_sensor_data *curr_sensor = NULL, *prev_sensor = NULL;
down_write(&lmh_sensor_access);
list_for_each_entry_safe(prev_sensor, curr_sensor, &lmh_sensor_list,
list_ptr) {
list_del(&prev_sensor->list_ptr);
pr_debug("Deregistering Sensor:[%s]\n",
prev_sensor->sensor_name);
lmh_sensor_deregister(&prev_sensor->ops);
devm_kfree(lmh_data->dev, prev_sensor);
}
up_write(&lmh_sensor_access);
}
static int lmh_check_tz_debug_cmds(void)
{
LMH_CHECK_SCM_CMD(LMH_DEBUG_SET);
LMH_CHECK_SCM_CMD(LMH_DEBUG_READ_BUF_SIZE);
LMH_CHECK_SCM_CMD(LMH_DEBUG_READ);
LMH_CHECK_SCM_CMD(LMH_DEBUG_GET_TYPE);
return 0;
}
static int lmh_check_tz_dev_cmds(void)
{
LMH_CHECK_SCM_CMD(LMH_CHANGE_PROFILE);
LMH_CHECK_SCM_CMD(LMH_GET_PROFILES);
return 0;
}
static int lmh_check_tz_sensor_cmds(void)
{
LMH_CHECK_SCM_CMD(LMH_CTRL_QPMDA);
if (!lmh_data->trim_err_disable)
LMH_CHECK_SCM_CMD(LMH_TRIM_ERROR);
LMH_CHECK_SCM_CMD(LMH_GET_INTENSITY);
LMH_CHECK_SCM_CMD(LMH_GET_SENSORS);
return 0;
}
static int lmh_parse_sensor(struct lmh_sensor_info *sens_info)
{
int ret = 0, idx = 0, size = 0;
struct lmh_sensor_data *lmh_sensor = NULL;
lmh_sensor = devm_kzalloc(lmh_data->dev, sizeof(struct lmh_sensor_data),
GFP_KERNEL);
if (!lmh_sensor) {
pr_err("No payload\n");
return -ENOMEM;
}
size = sizeof(sens_info->name);
size = min(size, LMH_NAME_MAX);
memset(lmh_sensor->sensor_name, '\0', LMH_NAME_MAX);
while (size--)
lmh_sensor->sensor_name[idx++] = ((sens_info->name
& (0xFF << (size * 8))) >> (size * 8));
if (lmh_sensor->sensor_name[idx - 1] == '\0')
idx--;
lmh_sensor->sensor_name[idx++] = '_';
size = sizeof(sens_info->node_id);
if ((idx + size) > LMH_NAME_MAX)
size -= LMH_NAME_MAX - idx - size - 1;
while (size--)
lmh_sensor->sensor_name[idx++] = ((sens_info->node_id
& (0xFF << (size * 8))) >> (size * 8));
pr_info("Registering sensor:[%s]\n", lmh_sensor->sensor_name);
lmh_sensor->ops.read = lmh_read;
lmh_sensor->ops.disable_hw_log = lmh_disable_log;
lmh_sensor->ops.enable_hw_log = lmh_enable_log;
lmh_sensor->sensor_sw_id = lmh_data->max_sensor_count++;
lmh_sensor->sensor_hw_name = sens_info->name;
lmh_sensor->sensor_hw_node_id = sens_info->node_id;
ret = lmh_sensor_register(lmh_sensor->sensor_name, &lmh_sensor->ops);
if (ret) {
pr_err("Sensor:[%s] registration failed. err:%d\n",
lmh_sensor->sensor_name, ret);
goto sens_exit;
}
list_add_tail(&lmh_sensor->list_ptr, &lmh_sensor_list);
pr_debug("Registered sensor:[%s] driver\n", lmh_sensor->sensor_name);
sens_exit:
if (ret)
devm_kfree(lmh_data->dev, lmh_sensor);
return ret;
}
static int lmh_get_sensor_list(void)
{
int ret = 0;
uint32_t size = 0, next = 0, idx = 0, count = 0;
struct scm_desc desc_arg;
struct lmh_sensor_packet *payload = NULL;
struct {
uint32_t addr;
uint32_t size;
} cmd_buf;
dma_addr_t payload_phys;
DEFINE_DMA_ATTRS(attrs);
struct device dev = {0};
dev.coherent_dma_mask = DMA_BIT_MASK(sizeof(dma_addr_t) * 8);
dma_set_attr(DMA_ATTR_STRONGLY_ORDERED, &attrs);
payload = dma_alloc_attrs(&dev,
PAGE_ALIGN(sizeof(struct lmh_sensor_packet)),
&payload_phys, GFP_KERNEL, &attrs);
if (!payload) {
pr_err("No payload\n");
return -ENOMEM;
}
do {
payload->count = next;
cmd_buf.addr = payload_phys;
/* payload_phys may be a physical address > 4 GB */
desc_arg.args[0] = payload_phys;
desc_arg.args[1] = cmd_buf.size = SCM_BUFFER_SIZE(struct
lmh_sensor_packet);
desc_arg.arginfo = SCM_ARGS(2, SCM_RW, SCM_VAL);
trace_lmh_event_call("GET_SENSORS enter");
if (!is_scm_armv8())
ret = scm_call(SCM_SVC_LMH, LMH_GET_SENSORS,
(void *) &cmd_buf,
SCM_BUFFER_SIZE(cmd_buf),
NULL, 0);
else
ret = scm_call2(SCM_SIP_FNID(SCM_SVC_LMH,
LMH_GET_SENSORS), &desc_arg);
/* Have memory barrier before we access the TZ data */
mb();
trace_lmh_event_call("GET_SENSORS exit");
if (ret < 0) {
pr_err("Error in SCM v%d call. err:%d\n",
(is_scm_armv8()) ? 8 : 7, ret);
goto get_exit;
}
size = payload->count;
if (!size) {
pr_err("No LMH sensor supported\n");
ret = -ENODEV;
goto get_exit;
}
count = ((size - next) > LMH_MAX_SENSOR) ? LMH_MAX_SENSOR :
(size - next);
next += LMH_MAX_SENSOR;
for (idx = 0; idx < count; idx++) {
ret = lmh_parse_sensor(&payload->sensor[idx]);
if (ret)
goto get_exit;
}
} while (next < size);
get_exit:
dma_free_attrs(&dev, size, payload, payload_phys, &attrs);
return ret;
}
static int lmh_set_level(struct lmh_device_ops *ops, int level)
{
int ret = 0, idx = 0;
struct scm_desc desc_arg;
struct lmh_profile *lmh_dev;
if (level < 0 || !ops) {
pr_err("Invalid Input\n");
return -EINVAL;
}
lmh_dev = container_of(ops, struct lmh_profile, dev_ops);
for (idx = 0; idx < lmh_dev->level_ct; idx++) {
if (level != lmh_dev->levels[idx])
continue;
break;
}
if (idx == lmh_dev->level_ct) {
pr_err("Invalid profile:[%d]\n", level);
return -EINVAL;
}
desc_arg.args[0] = level;
desc_arg.arginfo = SCM_ARGS(1, SCM_VAL);
if (!is_scm_armv8())
ret = scm_call_atomic1(SCM_SVC_LMH, LMH_CHANGE_PROFILE,
level);
else
ret = scm_call2(SCM_SIP_FNID(SCM_SVC_LMH,
LMH_CHANGE_PROFILE), &desc_arg);
if (ret) {
pr_err("Error in SCM v%d switching profile:[%d]. err:%d\n",
(is_scm_armv8()) ? 8 : 7, level, ret);
return ret;
}
pr_debug("Device:[%s] Current level:%d\n", LMH_DEVICE, level);
lmh_dev->curr_level = level;
return ret;
}
static int lmh_get_all_level(struct lmh_device_ops *ops, int *level)
{
struct lmh_profile *lmh_dev;
if (!ops) {
pr_err("Invalid input\n");
return -EINVAL;
}
lmh_dev = container_of(ops, struct lmh_profile, dev_ops);
if (!level)
return lmh_dev->level_ct;
memcpy(level, lmh_dev->levels, lmh_dev->level_ct * sizeof(uint32_t));
return 0;
}
static int lmh_get_level(struct lmh_device_ops *ops, int *level)
{
struct lmh_profile *lmh_dev;
if (!level || !ops) {
pr_err("Invalid input\n");
return -EINVAL;
}
lmh_dev = container_of(ops, struct lmh_profile, dev_ops);
*level = lmh_dev->curr_level;
return 0;
}
static int lmh_get_dev_info(void)
{
int ret = 0;
uint32_t size = 0, next = 0;
struct scm_desc desc_arg;
uint32_t *payload = NULL;
struct {
uint32_t list_addr;
uint32_t list_size;
uint32_t list_start;
} cmd_buf;
payload = devm_kzalloc(lmh_data->dev, sizeof(uint32_t) *
LMH_GET_PROFILE_SIZE, GFP_KERNEL);
if (!payload) {
pr_err("No payload\n");
ret = -ENOMEM;
goto get_dev_exit;
}
cmd_buf.list_addr = SCM_BUFFER_PHYS(payload);
/* &payload may be a physical address > 4 GB */
desc_arg.args[0] = SCM_BUFFER_PHYS(payload);
desc_arg.args[1] = cmd_buf.list_size =
SCM_BUFFER_SIZE(uint32_t) * LMH_GET_PROFILE_SIZE;
desc_arg.arginfo = SCM_ARGS(3, SCM_RW, SCM_VAL, SCM_VAL);
LMH_GET_RECURSSIVE_DATA(desc_arg, 2, cmd_buf, payload, next, size,
LMH_GET_PROFILES, lmh_data->dev_info.levels, ret);
if (ret)
goto get_dev_exit;
lmh_data->dev_info.level_ct = size;
lmh_data->dev_info.curr_level = LMH_DEFAULT_PROFILE;
ret = lmh_set_level(&lmh_data->dev_info.dev_ops,
lmh_hw_data->default_profile);
if (ret) {
pr_err("Error switching to default profile%d, err:%d\n",
lmh_data->dev_info.curr_level, ret);
goto get_dev_exit;
}
get_dev_exit:
if (ret)
devm_kfree(lmh_data->dev, lmh_data->dev_info.levels);
devm_kfree(lmh_data->dev, payload);
return ret;
}
static int lmh_device_init(void)
{
int ret = 0;
if (lmh_check_tz_dev_cmds())
return -ENODEV;
ret = lmh_get_dev_info();
if (ret)
goto dev_init_exit;
lmh_data->dev_info.dev_ops.get_available_levels = lmh_get_all_level;
lmh_data->dev_info.dev_ops.get_curr_level = lmh_get_level;
lmh_data->dev_info.dev_ops.set_level = lmh_set_level;
ret = lmh_device_register(LMH_DEVICE, &lmh_data->dev_info.dev_ops);
if (ret) {
pr_err("Error registering device:[%s]. err:%d", LMH_DEVICE,
ret);
goto dev_init_exit;
}
dev_init_exit:
return ret;
}
static int lmh_debug_read(struct lmh_debug_ops *ops, uint32_t **buf)
{
int ret = 0, size = 0, tz_ret = 0;
static uint32_t curr_size;
struct scm_desc desc_arg;
static uint32_t *payload;
struct {
uint32_t buf_addr;
uint32_t buf_size;
} cmd_buf;
desc_arg.arginfo = SCM_ARGS(0);
trace_lmh_event_call("GET_DEBUG_READ_SIZE enter");
if (!is_scm_armv8()) {
ret = scm_call(SCM_SVC_LMH, LMH_DEBUG_READ_BUF_SIZE,
NULL, 0, &size, SCM_BUFFER_SIZE(size));
} else {
ret = scm_call2(SCM_SIP_FNID(SCM_SVC_LMH,
LMH_DEBUG_READ_BUF_SIZE), &desc_arg);
size = desc_arg.ret[0];
}
trace_lmh_event_call("GET_DEBUG_READ_SIZE exit");
if (ret) {
pr_err("Error in SCM v%d get debug buffer size call. err:%d\n",
(is_scm_armv8()) ? 8 : 7, ret);
goto get_dbg_exit;
}
if (!size) {
pr_err("No Debug data to read.\n");
ret = -ENODEV;
goto get_dbg_exit;
}
size = SCM_BUFFER_SIZE(uint32_t) * size * LMH_READ_LINE_LENGTH;
if (curr_size != size) {
if (payload)
devm_kfree(lmh_data->dev, payload);
payload = devm_kzalloc(lmh_data->dev, size, GFP_KERNEL);
if (!payload) {
pr_err("payload buffer alloc failed\n");
ret = -ENOMEM;
goto get_dbg_exit;
}
curr_size = size;
}
cmd_buf.buf_addr = SCM_BUFFER_PHYS(payload);
/* &payload may be a physical address > 4 GB */
desc_arg.args[0] = SCM_BUFFER_PHYS(payload);
desc_arg.args[1] = cmd_buf.buf_size = curr_size;
desc_arg.arginfo = SCM_ARGS(2, SCM_RW, SCM_VAL);
trace_lmh_event_call("GET_DEBUG_READ enter");
dmac_flush_range(payload, payload + curr_size);
if (!is_scm_armv8()) {
ret = scm_call(SCM_SVC_LMH, LMH_DEBUG_READ,
(void *) &cmd_buf, SCM_BUFFER_SIZE(cmd_buf),
&tz_ret, SCM_BUFFER_SIZE(tz_ret));
} else {
ret = scm_call2(SCM_SIP_FNID(SCM_SVC_LMH,
LMH_DEBUG_READ), &desc_arg);
tz_ret = desc_arg.ret[0];
}
/* Have memory barrier before we access the TZ data */
mb();
trace_lmh_event_call("GET_DEBUG_READ exit");
if (ret) {
pr_err("Error in SCM v%d get debug read. err:%d\n",
(is_scm_armv8()) ? 8 : 7, ret);
goto get_dbg_exit;
}
if (tz_ret) {
pr_err("TZ API returned error. err:%d\n", tz_ret);
ret = tz_ret;
goto get_dbg_exit;
}
trace_lmh_debug_data("Debug read", payload,
curr_size / sizeof(uint32_t));
get_dbg_exit:
if (ret && payload) {
devm_kfree(lmh_data->dev, payload);
payload = NULL;
curr_size = 0;
}
*buf = payload;
return (ret < 0) ? ret : curr_size;
}
static int lmh_debug_config_write(uint32_t cmd_id, uint32_t *buf, int size)
{
int ret = 0, size_bytes = 0;
struct scm_desc desc_arg;
uint32_t *payload = NULL;
struct {
uint32_t buf_addr;
uint32_t buf_size;
uint32_t node;
uint32_t node_id;
uint32_t read_type;
} cmd_buf;
trace_lmh_debug_data("Config LMH", buf, size);
size_bytes = (size - 3) * sizeof(uint32_t);
payload = devm_kzalloc(lmh_data->dev, size_bytes, GFP_KERNEL);
if (!payload) {
ret = -ENOMEM;
goto set_cfg_exit;
}
memcpy(payload, &buf[3], size_bytes);
cmd_buf.buf_addr = SCM_BUFFER_PHYS(payload);
/* &payload may be a physical address > 4 GB */
desc_arg.args[0] = SCM_BUFFER_PHYS(payload);
desc_arg.args[1] = cmd_buf.buf_size = size_bytes;
desc_arg.args[2] = cmd_buf.node = buf[0];
desc_arg.args[3] = cmd_buf.node_id = buf[1];
desc_arg.args[4] = cmd_buf.read_type = buf[2];
desc_arg.arginfo = SCM_ARGS(5, SCM_RO, SCM_VAL, SCM_VAL, SCM_VAL,
SCM_VAL);
trace_lmh_event_call("CONFIG_DEBUG_WRITE enter");
dmac_flush_range(payload, payload + size_bytes);
if (!is_scm_armv8())
ret = scm_call(SCM_SVC_LMH, cmd_id, (void *) &cmd_buf,
SCM_BUFFER_SIZE(cmd_buf), NULL, 0);
else
ret = scm_call2(SCM_SIP_FNID(SCM_SVC_LMH, cmd_id), &desc_arg);
/* Have memory barrier before we access the TZ data */
mb();
trace_lmh_event_call("CONFIG_DEBUG_WRITE exit");
if (ret) {
pr_err("Error in SCM v%d config debug read. err:%d\n",
(is_scm_armv8()) ? 8 : 7, ret);
goto set_cfg_exit;
}
set_cfg_exit:
return ret;
}
static int lmh_debug_config_read(struct lmh_debug_ops *ops, uint32_t *buf,
int size)
{
return lmh_debug_config_write(LMH_DEBUG_SET, buf, size);
}
static int lmh_debug_get_types(struct lmh_debug_ops *ops, bool is_read,
uint32_t **buf)
{
int ret = 0;
uint32_t size = 0, next = 0;
struct scm_desc desc_arg;
uint32_t *payload = NULL, *dest_buf = NULL;
struct {
uint32_t list_addr;
uint32_t list_size;
uint32_t cmd_type;
uint32_t list_start;
} cmd_buf;
if (is_read && lmh_data->debug_info.read_type) {
*buf = lmh_data->debug_info.read_type;
trace_lmh_debug_data("Data type",
lmh_data->debug_info.read_type,
lmh_data->debug_info.read_type_count);
return lmh_data->debug_info.read_type_count;
} else if (!is_read && lmh_data->debug_info.config_type) {
*buf = lmh_data->debug_info.config_type;
trace_lmh_debug_data("Config type",
lmh_data->debug_info.config_type,
lmh_data->debug_info.config_type_count);
return lmh_data->debug_info.config_type_count;
}
payload = devm_kzalloc(lmh_data->dev, sizeof(uint32_t) *
LMH_SCM_PAYLOAD_SIZE, GFP_KERNEL);
if (!payload) {
ret = -ENOMEM;
goto get_type_exit;
}
cmd_buf.list_addr = SCM_BUFFER_PHYS(payload);
/* &payload may be a physical address > 4 GB */
desc_arg.args[0] = SCM_BUFFER_PHYS(payload);
desc_arg.args[1] = cmd_buf.list_size =
SCM_BUFFER_SIZE(uint32_t) * LMH_SCM_PAYLOAD_SIZE;
desc_arg.args[2] = cmd_buf.cmd_type = (is_read) ?
LMH_DEBUG_READ_TYPE : LMH_DEBUG_CONFIG_TYPE;
desc_arg.arginfo = SCM_ARGS(4, SCM_RW, SCM_VAL, SCM_VAL, SCM_VAL);
LMH_GET_RECURSSIVE_DATA(desc_arg, 3, cmd_buf, payload, next, size,
LMH_DEBUG_GET_TYPE, dest_buf, ret);
if (ret)
goto get_type_exit;
pr_debug("Total %s types:%d\n", (is_read) ? "read" : "config", size);
if (is_read) {
lmh_data->debug_info.read_type = *buf = dest_buf;
lmh_data->debug_info.read_type_count = size;
trace_lmh_debug_data("Data type", dest_buf, size);
} else {
lmh_data->debug_info.config_type = *buf = dest_buf;
lmh_data->debug_info.config_type_count = size;
trace_lmh_debug_data("Config type", dest_buf, size);
}
get_type_exit:
if (ret) {
devm_kfree(lmh_data->dev, lmh_data->debug_info.read_type);
devm_kfree(lmh_data->dev, lmh_data->debug_info.config_type);
lmh_data->debug_info.config_type_count = 0;
lmh_data->debug_info.read_type_count = 0;
}
devm_kfree(lmh_data->dev, payload);
return (ret) ? ret : size;
}
static int lmh_debug_lmh_config(struct lmh_debug_ops *ops, uint32_t *buf,
int size)
{
return lmh_debug_config_write(LMH_DEBUG_SET, buf, size);
}
static void lmh_voltage_scale_set(uint32_t voltage)
{
char trace_buf[MAX_TRACE_EVENT_MSG_LEN] = "";
mutex_lock(&scm_lmh_lock);
writel_relaxed(voltage, lmh_data->dpm_voltage_scale_reg);
mutex_unlock(&scm_lmh_lock);
snprintf(trace_buf, MAX_TRACE_EVENT_MSG_LEN,
"DPM voltage scale %d mV", voltage);
pr_debug("%s\n", trace_buf);
trace_lmh_event_call(trace_buf);
}
static void write_to_odcm(bool enable)
{
uint32_t idx = 0, data = enable ? 1 : 0;
for (; idx < LMH_ODCM_MAX_COUNT; idx++)
writel_relaxed(data, lmh_data->odcm_reg[idx]);
}
static void evaluate_and_config_odcm(uint32_t rail_uV, unsigned long state)
{
uint32_t rail_mV = rail_uV / 1000;
static bool prev_state, disable_odcm;
mutex_lock(&lmh_odcm_access);
switch (state) {
case REGULATOR_EVENT_VOLTAGE_CHANGE:
if (!disable_odcm)
break;
pr_debug("Disable ODCM\n");
write_to_odcm(false);
lmh_data->odcm_enabled = false;
disable_odcm = false;
break;
case REGULATOR_EVENT_PRE_VOLTAGE_CHANGE:
disable_odcm = false;
prev_state = lmh_data->odcm_enabled;
if (rail_mV > lmh_data->odcm_thresh_mV) {
if (lmh_data->odcm_enabled)
break;
/* Enable ODCM before the voltage increases */
pr_debug("Enable ODCM for voltage %u mV\n", rail_mV);
write_to_odcm(true);
lmh_data->odcm_enabled = true;
} else {
if (!lmh_data->odcm_enabled)
break;
/* Disable ODCM after the voltage decreases */
pr_debug("Disable ODCM for voltage %u mV\n", rail_mV);
disable_odcm = true;
}
break;
case REGULATOR_EVENT_ABORT_VOLTAGE_CHANGE:
disable_odcm = false;
if (prev_state == lmh_data->odcm_enabled)
break;
pr_debug("Reverting ODCM state to %s\n",
prev_state ? "enabled" : "disabled");
write_to_odcm(prev_state);
lmh_data->odcm_enabled = prev_state;
break;
default:
break;
}
mutex_unlock(&lmh_odcm_access);
}
static int lmh_voltage_change_notifier(struct notifier_block *nb_data,
unsigned long event, void *data)
{
uint32_t voltage = 0;
static uint32_t last_voltage;
static bool change_needed;
if (event == REGULATOR_EVENT_VOLTAGE_CHANGE) {
/* Convert from uV to mV */
pr_debug("Received event POST_VOLTAGE_CHANGE\n");
voltage = ((unsigned long)data) / 1000;
if (change_needed == 1 &&
(last_voltage == voltage)) {
lmh_voltage_scale_set(voltage);
change_needed = 0;
}
if (lmh_data->odcm_reg[0])
evaluate_and_config_odcm(0, event);
} else if (event == REGULATOR_EVENT_PRE_VOLTAGE_CHANGE) {
struct pre_voltage_change_data *change_data =
(struct pre_voltage_change_data *)data;
last_voltage = change_data->min_uV / 1000;
if (change_data->min_uV > change_data->old_uV)
/* Going from low to high apply change first */
lmh_voltage_scale_set(last_voltage);
else
/* Going from high to low apply change after */
change_needed = 1;
pr_debug("Received event PRE_VOLTAGE_CHANGE\n");
pr_debug("max = %lu mV min = %lu mV previous = %lu mV\n",
change_data->max_uV / 1000, change_data->min_uV / 1000,
change_data->old_uV / 1000);
if (lmh_data->odcm_reg[0])
evaluate_and_config_odcm(change_data->max_uV, event);
} else if (event == REGULATOR_EVENT_ABORT_VOLTAGE_CHANGE) {
pr_debug("Received event ABORT_VOLTAGE_CHANGE\n");
if (lmh_data->odcm_reg[0])
evaluate_and_config_odcm(0, event);
}
return NOTIFY_OK;
}
static void lmh_dpm_remove(void)
{
if (!IS_ERR_OR_NULL(lmh_data->regulator) &&
lmh_data->dpm_notifier_blk.notifier_call != NULL) {
regulator_unregister_notifier(lmh_data->regulator,
&(lmh_data->dpm_notifier_blk));
lmh_data->regulator = NULL;
}
}
static void lmh_dpm_init(void)
{
int ret = 0;
lmh_data->dpm_voltage_scale_reg = devm_ioremap(lmh_data->dev,
(phys_addr_t)APCS_DPM_VOLTAGE_SCALE, 4);
if (!lmh_data->dpm_voltage_scale_reg) {
ret = -ENODEV;
pr_err("Error mapping LMH DPM voltage scale register\n");
goto dpm_init_exit;
}
lmh_data->dpm_notifier_blk.notifier_call = lmh_voltage_change_notifier;
ret = regulator_register_notifier(lmh_data->regulator,
&(lmh_data->dpm_notifier_blk));
if (ret) {
pr_err("DPM regulator notification registration failed. err:%d\n",
ret);
goto dpm_init_exit;
}
dpm_init_exit:
if (ret) {
if (lmh_data->dpm_notifier_blk.notifier_call)
regulator_unregister_notifier(lmh_data->regulator,
&(lmh_data->dpm_notifier_blk));
devm_regulator_put(lmh_data->regulator);
lmh_data->dpm_notifier_blk.notifier_call = NULL;
lmh_data->regulator = NULL;
}
}
static int lmh_debug_init(void)
{
int ret = 0;
if (lmh_check_tz_debug_cmds()) {
pr_debug("Debug commands not available.\n");
return -ENODEV;
}
lmh_data->debug_info.debug_ops.debug_read = lmh_debug_read;
lmh_data->debug_info.debug_ops.debug_config_read
= lmh_debug_config_read;
lmh_data->debug_info.debug_ops.debug_config_lmh
= lmh_debug_lmh_config;
lmh_data->debug_info.debug_ops.debug_get_types
= lmh_debug_get_types;
ret = lmh_debug_register(&lmh_data->debug_info.debug_ops);
if (ret) {
pr_err("Error registering debug ops. err:%d\n", ret);
goto debug_init_exit;
}
debug_init_exit:
return ret;
}
static int lmh_sensor_init(struct platform_device *pdev)
{
int ret = 0;
if (lmh_check_tz_sensor_cmds())
return -ENODEV;
down_write(&lmh_sensor_access);
ret = lmh_get_sensor_list();
if (ret)
goto init_exit;
lmh_data->intr_state = LMH_ISR_MONITOR;
ret = lmh_get_sensor_devicetree(pdev);
if (ret) {
pr_err("Error getting device tree data. err:%d\n", ret);
goto init_exit;
}
pr_debug("LMH Sensor Init complete\n");
init_exit:
up_write(&lmh_sensor_access);
if (ret)
lmh_remove_sensors();
return ret;
}
static int lmh_probe(struct platform_device *pdev)
{
int ret = 0;
if (lmh_data) {
pr_err("Reinitializing lmh hardware driver\n");
return -EEXIST;
}
lmh_data = devm_kzalloc(&pdev->dev, sizeof(struct lmh_driver_data),
GFP_KERNEL);
if (!lmh_data) {
pr_err("kzalloc failed\n");
return -ENOMEM;
}
lmh_data->dev = &pdev->dev;
lmh_data->poll_wq = alloc_workqueue("lmh_poll_wq", WQ_HIGHPRI, 0);
if (!lmh_data->poll_wq) {
pr_err("Error allocating workqueue\n");
ret = -ENOMEM;
goto probe_exit;
}
INIT_DEFERRABLE_WORK(&lmh_data->poll_work, lmh_poll);
ret = lmh_sensor_init(pdev);
if (ret) {
pr_err("Sensor Init failed. err:%d\n", ret);
goto probe_exit;
}
ret = lmh_device_init();
if (ret) {
pr_err("WARNING: Device Init failed. err:%d. LMH continues\n",
ret);
ret = 0;
}
if (lmh_data->regulator)
lmh_dpm_init();
ret = lmh_debug_init();
if (ret) {
pr_err("LMH debug init failed. err:%d\n", ret);
ret = 0;
}
platform_set_drvdata(pdev, lmh_data);
return ret;
probe_exit:
if (lmh_data->poll_wq)
destroy_workqueue(lmh_data->poll_wq);
lmh_data = NULL;
return ret;
}
static int lmh_remove(struct platform_device *pdev)
{
struct lmh_driver_data *lmh_dat = platform_get_drvdata(pdev);
destroy_workqueue(lmh_dat->poll_wq);
free_irq(lmh_dat->irq_num, lmh_dat);
lmh_remove_sensors();
lmh_device_deregister(&lmh_dat->dev_info.dev_ops);
lmh_dpm_remove();
return 0;
}
static struct of_device_id lmh_match[] = {
{
.compatible = "qcom,lmh",
.data = (void *)&lmh_lite_data,
},
{
.compatible = "qcom,lmh_v1",
.data = (void *)&lmh_v1_data,
},
{},
};
static struct platform_driver lmh_driver = {
.probe = lmh_probe,
.remove = lmh_remove,
.driver = {
.name = LMH_DRIVER_NAME,
.owner = THIS_MODULE,
.of_match_table = lmh_match,
},
};
int __init lmh_init_driver(void)
{
struct device_node *comp_node;
comp_node = of_find_matching_node(NULL, lmh_match);
if (comp_node) {
const struct of_device_id *match = of_match_node(lmh_match,
comp_node);
if (!match) {
pr_err("Couldnt find a match\n");
goto plt_register;
}
lmh_hw_data = (struct lmh_default_data *)match->data;
of_node_put(comp_node);
}
plt_register:
return platform_driver_register(&lmh_driver);
}
static void __exit lmh_exit(void)
{
platform_driver_unregister(&lmh_driver);
}
late_initcall(lmh_init_driver);
module_exit(lmh_exit);
MODULE_DESCRIPTION("LMH hardware interface");
MODULE_ALIAS("platform:" LMH_DRIVER_NAME);
MODULE_LICENSE("GPL v2");
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