blob: c9ef9f4a8ac9a02a4346cabd004c2f8d44ab5987 [file] [log] [blame]
/*
* Copyright (c) 2012-2015, 2017 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.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/fs.h>
#include <linux/cdev.h>
#include <linux/uaccess.h>
#include <linux/device.h>
#include <linux/io.h>
#include <linux/platform_device.h>
#include <linux/avtimer.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/wait.h>
#include <linux/sched.h>
#include <ipc/apr.h>
#include <dsp/q6core.h>
#define DEVICE_NAME "avtimer"
#define TIMEOUT_MS 1000
#define CORE_CLIENT 1
#define TEMP_PORT ((CORE_CLIENT << 8) | 0x0001)
#define SSR_WAKETIME 1000
#define Q6_READY_RETRY 250
#define Q6_READY_MAX_RETRIES 40
#define AVCS_CMD_REMOTE_AVTIMER_VOTE_REQUEST 0x00012914
#define AVCS_CMD_RSP_REMOTE_AVTIMER_VOTE_REQUEST 0x00012915
#define AVCS_CMD_REMOTE_AVTIMER_RELEASE_REQUEST 0x00012916
#define AVTIMER_REG_CNT 2
struct adsp_avt_timer {
struct apr_hdr hdr;
union {
char client_name[8];
u32 avtimer_handle;
};
} __packed;
static int major;
struct avtimer_t {
struct apr_svc *core_handle_q;
struct cdev myc;
struct class *avtimer_class;
struct mutex avtimer_lock;
int avtimer_open_cnt;
struct delayed_work ssr_dwork;
wait_queue_head_t adsp_resp_wait;
int enable_timer_resp_received;
int timer_handle;
void __iomem *p_avtimer_msw;
void __iomem *p_avtimer_lsw;
uint32_t clk_div;
uint32_t clk_mult;
atomic_t adsp_ready;
int num_retries;
};
static struct avtimer_t avtimer;
static int32_t aprv2_core_fn_q(struct apr_client_data *data, void *priv)
{
uint32_t *payload1;
if (!data) {
pr_err("%s: Invalid params\n", __func__);
return -EINVAL;
}
pr_debug("%s: core msg: payload len = %u, apr resp opcode = 0x%X\n",
__func__, data->payload_size, data->opcode);
switch (data->opcode) {
case APR_BASIC_RSP_RESULT:{
if (!data->payload_size) {
pr_err("%s: APR_BASIC_RSP_RESULT No Payload ",
__func__);
return 0;
}
payload1 = data->payload;
switch (payload1[0]) {
case AVCS_CMD_REMOTE_AVTIMER_RELEASE_REQUEST:
pr_debug("%s: Cmd = TIMER RELEASE status[0x%x]\n",
__func__, payload1[1]);
break;
default:
pr_err("Invalid cmd rsp[0x%x][0x%x]\n",
payload1[0], payload1[1]);
break;
}
break;
}
case RESET_EVENTS:{
pr_debug("%s: Reset event received in AV timer\n", __func__);
apr_reset(avtimer.core_handle_q);
avtimer.core_handle_q = NULL;
avtimer.avtimer_open_cnt = 0;
atomic_set(&avtimer.adsp_ready, 0);
schedule_delayed_work(&avtimer.ssr_dwork,
msecs_to_jiffies(SSR_WAKETIME));
break;
}
case AVCS_CMD_RSP_REMOTE_AVTIMER_VOTE_REQUEST:
payload1 = data->payload;
pr_debug("%s: RSP_REMOTE_AVTIMER_VOTE_REQUEST handle %x\n",
__func__, payload1[0]);
avtimer.timer_handle = payload1[0];
avtimer.enable_timer_resp_received = 1;
wake_up(&avtimer.adsp_resp_wait);
break;
default:
pr_err("%s: Message adspcore svc: %d\n",
__func__, data->opcode);
break;
}
return 0;
}
int avcs_core_open(void)
{
if (!avtimer.core_handle_q)
avtimer.core_handle_q = apr_register("ADSP", "CORE",
aprv2_core_fn_q, TEMP_PORT, NULL);
pr_debug("%s: Open_q %p\n", __func__, avtimer.core_handle_q);
if (!avtimer.core_handle_q) {
pr_err("%s: Unable to register CORE\n", __func__);
return -EINVAL;
}
return 0;
}
EXPORT_SYMBOL(avcs_core_open);
static int avcs_core_disable_avtimer(int timerhandle)
{
int rc = -EINVAL;
struct adsp_avt_timer payload;
if (!timerhandle) {
pr_err("%s: Invalid timer handle\n", __func__);
return -EINVAL;
}
memset(&payload, 0, sizeof(payload));
rc = avcs_core_open();
if (!rc && avtimer.core_handle_q) {
payload.hdr.hdr_field = APR_HDR_FIELD(APR_MSG_TYPE_SEQ_CMD,
APR_HDR_LEN(APR_HDR_SIZE), APR_PKT_VER);
payload.hdr.pkt_size =
sizeof(struct adsp_avt_timer);
payload.hdr.src_svc = avtimer.core_handle_q->id;
payload.hdr.src_domain = APR_DOMAIN_APPS;
payload.hdr.dest_domain = APR_DOMAIN_ADSP;
payload.hdr.dest_svc = APR_SVC_ADSP_CORE;
payload.hdr.src_port = TEMP_PORT;
payload.hdr.dest_port = TEMP_PORT;
payload.hdr.token = CORE_CLIENT;
payload.hdr.opcode = AVCS_CMD_REMOTE_AVTIMER_RELEASE_REQUEST;
payload.avtimer_handle = timerhandle;
pr_debug("%s: disable avtimer opcode %x handle %x\n",
__func__, payload.hdr.opcode, payload.avtimer_handle);
rc = apr_send_pkt(avtimer.core_handle_q,
(uint32_t *)&payload);
if (rc < 0)
pr_err("%s: Enable AVtimer failed op[0x%x]rc[%d]\n",
__func__, payload.hdr.opcode, rc);
else
rc = 0;
}
return rc;
}
static int avcs_core_enable_avtimer(char *client_name)
{
int rc = -EINVAL, ret = -EINVAL;
struct adsp_avt_timer payload;
if (!client_name) {
pr_err("%s: Invalid params\n", __func__);
return -EINVAL;
}
memset(&payload, 0, sizeof(payload));
rc = avcs_core_open();
if (!rc && avtimer.core_handle_q) {
avtimer.enable_timer_resp_received = 0;
payload.hdr.hdr_field = APR_HDR_FIELD(APR_MSG_TYPE_EVENT,
APR_HDR_LEN(APR_HDR_SIZE), APR_PKT_VER);
payload.hdr.pkt_size =
sizeof(struct adsp_avt_timer);
payload.hdr.src_svc = avtimer.core_handle_q->id;
payload.hdr.src_domain = APR_DOMAIN_APPS;
payload.hdr.dest_domain = APR_DOMAIN_ADSP;
payload.hdr.dest_svc = APR_SVC_ADSP_CORE;
payload.hdr.src_port = TEMP_PORT;
payload.hdr.dest_port = TEMP_PORT;
payload.hdr.token = CORE_CLIENT;
payload.hdr.opcode = AVCS_CMD_REMOTE_AVTIMER_VOTE_REQUEST;
strlcpy(payload.client_name, client_name,
sizeof(payload.client_name));
pr_debug("%s: enable avtimer opcode %x client name %s\n",
__func__, payload.hdr.opcode, payload.client_name);
rc = apr_send_pkt(avtimer.core_handle_q,
(uint32_t *)&payload);
if (rc < 0) {
pr_err("%s: Enable AVtimer failed op[0x%x]rc[%d]\n",
__func__, payload.hdr.opcode, rc);
goto bail;
} else
rc = 0;
ret = wait_event_timeout(avtimer.adsp_resp_wait,
(avtimer.enable_timer_resp_received == 1),
msecs_to_jiffies(TIMEOUT_MS));
if (!ret) {
pr_err("%s: wait_event timeout for Enable timer\n",
__func__);
rc = -ETIMEDOUT;
}
if (rc)
avtimer.timer_handle = 0;
}
bail:
return rc;
}
int avcs_core_disable_power_collapse(int enable)
{
int rc = 0;
mutex_lock(&avtimer.avtimer_lock);
if (enable) {
if (avtimer.avtimer_open_cnt) {
avtimer.avtimer_open_cnt++;
pr_debug("%s: opened avtimer open count=%d\n",
__func__, avtimer.avtimer_open_cnt);
rc = 0;
goto done;
}
rc = avcs_core_enable_avtimer("timer");
if (!rc) {
avtimer.avtimer_open_cnt++;
atomic_set(&avtimer.adsp_ready, 1);
}
} else {
if (avtimer.avtimer_open_cnt > 0) {
avtimer.avtimer_open_cnt--;
if (!avtimer.avtimer_open_cnt) {
rc = avcs_core_disable_avtimer(
avtimer.timer_handle);
avtimer.timer_handle = 0;
}
}
}
done:
mutex_unlock(&avtimer.avtimer_lock);
return rc;
}
EXPORT_SYMBOL(avcs_core_disable_power_collapse);
static void reset_work(struct work_struct *work)
{
if (q6core_is_adsp_ready()) {
avcs_core_disable_power_collapse(1);
avtimer.num_retries = Q6_READY_MAX_RETRIES;
return;
}
pr_debug("%s:Q6 not ready-retry after sometime\n", __func__);
if (--avtimer.num_retries > 0) {
schedule_delayed_work(&avtimer.ssr_dwork,
msecs_to_jiffies(Q6_READY_RETRY));
} else {
pr_err("%s: Q6 failed responding after multiple retries\n",
__func__);
avtimer.num_retries = Q6_READY_MAX_RETRIES;
}
}
int avcs_core_query_timer(uint64_t *avtimer_tick)
{
uint32_t avtimer_msw = 0, avtimer_lsw = 0;
uint64_t avtimer_tick_temp;
if (!atomic_read(&avtimer.adsp_ready)) {
pr_debug("%s:In SSR, return\n", __func__);
return -ENETRESET;
}
avtimer_lsw = ioread32(avtimer.p_avtimer_lsw);
avtimer_msw = ioread32(avtimer.p_avtimer_msw);
avtimer_tick_temp = (uint64_t)((uint64_t)avtimer_msw << 32)
| avtimer_lsw;
*avtimer_tick = mul_u64_u32_div(avtimer_tick_temp, avtimer.clk_mult,
avtimer.clk_div);
pr_debug_ratelimited("%s:Avtimer: msw: %u, lsw: %u, tick: %llu\n",
__func__,
avtimer_msw, avtimer_lsw, *avtimer_tick);
return 0;
}
EXPORT_SYMBOL(avcs_core_query_timer);
static int avtimer_open(struct inode *inode, struct file *file)
{
return avcs_core_disable_power_collapse(1);
}
static int avtimer_release(struct inode *inode, struct file *file)
{
return avcs_core_disable_power_collapse(0);
}
/*
* ioctl call provides GET_AVTIMER
*/
static long avtimer_ioctl(struct file *file, unsigned int ioctl_num,
unsigned long ioctl_param)
{
switch (ioctl_num) {
case IOCTL_GET_AVTIMER_TICK:
{
uint64_t avtimer_tick = 0;
int rc;
rc = avcs_core_query_timer(&avtimer_tick);
if (rc) {
pr_err("%s: Error: Invalid AV Timer tick, rc = %d\n",
__func__, rc);
return rc;
}
pr_debug_ratelimited("%s: AV Timer tick: time %llx\n",
__func__, avtimer_tick);
if (copy_to_user((void __user *)ioctl_param, &avtimer_tick,
sizeof(avtimer_tick))) {
pr_err("%s: copy_to_user failed\n", __func__);
return -EFAULT;
}
}
break;
default:
pr_err("%s: invalid cmd\n", __func__);
return -EINVAL;
}
return 0;
}
static const struct file_operations avtimer_fops = {
.unlocked_ioctl = avtimer_ioctl,
.compat_ioctl = avtimer_ioctl,
.open = avtimer_open,
.release = avtimer_release
};
static int dev_avtimer_probe(struct platform_device *pdev)
{
int result = 0;
dev_t dev = MKDEV(major, 0);
struct device *device_handle;
struct resource *reg_lsb = NULL, *reg_msb = NULL;
uint32_t clk_div_val;
uint32_t clk_mult_val;
if (!pdev) {
pr_err("%s: Invalid params\n", __func__);
return -EINVAL;
}
reg_lsb = platform_get_resource_byname(pdev,
IORESOURCE_MEM, "avtimer_lsb_addr");
if (!reg_lsb) {
dev_err(&pdev->dev, "%s: Looking up %s property",
"avtimer_lsb_addr", __func__);
return -EINVAL;
}
reg_msb = platform_get_resource_byname(pdev,
IORESOURCE_MEM, "avtimer_msb_addr");
if (!reg_msb) {
dev_err(&pdev->dev, "%s: Looking up %s property",
"avtimer_msb_addr", __func__);
return -EINVAL;
}
INIT_DELAYED_WORK(&avtimer.ssr_dwork, reset_work);
avtimer.p_avtimer_lsw = devm_ioremap_nocache(&pdev->dev,
reg_lsb->start, resource_size(reg_lsb));
if (!avtimer.p_avtimer_lsw) {
dev_err(&pdev->dev, "%s: ioremap failed for lsb avtimer register",
__func__);
return -ENOMEM;
}
avtimer.p_avtimer_msw = devm_ioremap_nocache(&pdev->dev,
reg_msb->start, resource_size(reg_msb));
if (!avtimer.p_avtimer_msw) {
dev_err(&pdev->dev, "%s: ioremap failed for msb avtimer register",
__func__);
goto unmap;
}
avtimer.num_retries = Q6_READY_MAX_RETRIES;
/* get the device number */
if (major)
result = register_chrdev_region(dev, 1, DEVICE_NAME);
else {
result = alloc_chrdev_region(&dev, 0, 1, DEVICE_NAME);
major = MAJOR(dev);
}
if (result < 0) {
dev_err(&pdev->dev, "%s: Registering avtimer device failed\n",
__func__);
goto unmap;
}
avtimer.avtimer_class = class_create(THIS_MODULE, "avtimer");
if (IS_ERR(avtimer.avtimer_class)) {
result = PTR_ERR(avtimer.avtimer_class);
dev_err(&pdev->dev, "%s: Error creating avtimer class: %d\n",
__func__, result);
goto unregister_chrdev_region;
}
cdev_init(&avtimer.myc, &avtimer_fops);
result = cdev_add(&avtimer.myc, dev, 1);
if (result < 0) {
dev_err(&pdev->dev, "%s: Registering file operations failed\n",
__func__);
goto class_destroy;
}
device_handle = device_create(avtimer.avtimer_class,
NULL, avtimer.myc.dev, NULL, "avtimer");
if (IS_ERR(device_handle)) {
result = PTR_ERR(device_handle);
pr_err("%s: device_create failed: %d\n", __func__, result);
goto class_destroy;
}
init_waitqueue_head(&avtimer.adsp_resp_wait);
mutex_init(&avtimer.avtimer_lock);
avtimer.avtimer_open_cnt = 0;
pr_debug("%s: Device create done for avtimer major=%d\n",
__func__, major);
if (of_property_read_u32(pdev->dev.of_node,
"qcom,clk-div", &clk_div_val))
avtimer.clk_div = 1;
else
avtimer.clk_div = clk_div_val;
if (of_property_read_u32(pdev->dev.of_node,
"qcom,clk-mult", &clk_mult_val))
avtimer.clk_mult = 1;
else
avtimer.clk_mult = clk_mult_val;
pr_debug("%s: avtimer.clk_div = %d, avtimer.clk_mult = %d\n",
__func__, avtimer.clk_div, avtimer.clk_mult);
return 0;
class_destroy:
class_destroy(avtimer.avtimer_class);
unregister_chrdev_region:
unregister_chrdev_region(MKDEV(major, 0), 1);
unmap:
if (avtimer.p_avtimer_lsw)
devm_iounmap(&pdev->dev, avtimer.p_avtimer_lsw);
if (avtimer.p_avtimer_msw)
devm_iounmap(&pdev->dev, avtimer.p_avtimer_msw);
avtimer.p_avtimer_lsw = NULL;
avtimer.p_avtimer_msw = NULL;
return result;
}
static int dev_avtimer_remove(struct platform_device *pdev)
{
pr_debug("%s: dev_avtimer_remove\n", __func__);
if (avtimer.p_avtimer_lsw)
devm_iounmap(&pdev->dev, avtimer.p_avtimer_lsw);
if (avtimer.p_avtimer_msw)
devm_iounmap(&pdev->dev, avtimer.p_avtimer_msw);
device_destroy(avtimer.avtimer_class, avtimer.myc.dev);
cdev_del(&avtimer.myc);
class_destroy(avtimer.avtimer_class);
unregister_chrdev_region(MKDEV(major, 0), 1);
return 0;
}
static const struct of_device_id avtimer_machine_of_match[] = {
{ .compatible = "qcom,avtimer", },
{},
};
static struct platform_driver dev_avtimer_driver = {
.probe = dev_avtimer_probe,
.remove = dev_avtimer_remove,
.driver = {
.name = "dev_avtimer",
.of_match_table = avtimer_machine_of_match,
},
};
int __init avtimer_init(void)
{
s32 rc;
rc = platform_driver_register(&dev_avtimer_driver);
if (rc < 0) {
pr_err("%s: platform_driver_register failed\n", __func__);
goto error_platform_driver;
}
pr_debug("%s: dev_avtimer_init : done\n", __func__);
return 0;
error_platform_driver:
pr_err("%s: encounterd error\n", __func__);
return rc;
}
void avtimer_exit(void)
{
platform_driver_unregister(&dev_avtimer_driver);
}
MODULE_DESCRIPTION("avtimer driver");
MODULE_LICENSE("GPL v2");