blob: 8316f003bcd43055a6ca3e9423d80ded584c6556 [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2012-2014, 2017-2019, The Linux Foundation. All rights reserved.
*/
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/err.h>
#include <linux/string.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <ipc/apr.h>
#include <linux/of_device.h>
#include <linux/sysfs.h>
#include <linux/workqueue.h>
#include <linux/nvmem-consumer.h>
#include <linux/slab.h>
#include <soc/qcom/subsystem_restart.h>
#define Q6_PIL_GET_DELAY_MS 100
#define BOOT_CMD 1
#define SSR_RESET_CMD 1
#define IMAGE_UNLOAD_CMD 0
#define MAX_FW_IMAGES 4
static ssize_t adsp_boot_store(struct kobject *kobj,
struct kobj_attribute *attr,
const char *buf, size_t count);
static ssize_t adsp_ssr_store(struct kobject *kobj,
struct kobj_attribute *attr,
const char *buf, size_t count);
struct adsp_loader_private {
void *pil_h;
struct kobject *boot_adsp_obj;
struct attribute_group *attr_group;
char *adsp_fw_name;
};
static struct kobj_attribute adsp_boot_attribute =
__ATTR(boot, 0220, NULL, adsp_boot_store);
static struct kobj_attribute adsp_ssr_attribute =
__ATTR(ssr, 0220, NULL, adsp_ssr_store);
static struct attribute *attrs[] = {
&adsp_boot_attribute.attr,
&adsp_ssr_attribute.attr,
NULL,
};
static struct work_struct adsp_ldr_work;
static struct platform_device *adsp_private;
static void adsp_loader_unload(struct platform_device *pdev);
static void adsp_load_fw(struct work_struct *adsp_ldr_work)
{
struct platform_device *pdev = adsp_private;
struct adsp_loader_private *priv = NULL;
const char *adsp_dt = "qcom,adsp-state";
int rc = 0;
u32 adsp_state;
const char *img_name;
if (!pdev) {
dev_err(&pdev->dev, "%s: Platform device null\n", __func__);
goto fail;
}
if (!pdev->dev.of_node) {
dev_err(&pdev->dev,
"%s: Device tree information missing\n", __func__);
goto fail;
}
rc = of_property_read_u32(pdev->dev.of_node, adsp_dt, &adsp_state);
if (rc) {
dev_err(&pdev->dev,
"%s: ADSP state = %x\n", __func__, adsp_state);
goto fail;
}
rc = of_property_read_string(pdev->dev.of_node,
"qcom,proc-img-to-load",
&img_name);
if (rc) {
dev_dbg(&pdev->dev,
"%s: loading default image ADSP\n", __func__);
goto load_adsp;
}
if (!strcmp(img_name, "modem")) {
/* adsp_state always returns "0". So load modem image based on
* apr_modem_state to prevent loading of image twice
*/
adsp_state = apr_get_modem_state();
if (adsp_state == APR_SUBSYS_DOWN) {
priv = platform_get_drvdata(pdev);
if (!priv) {
dev_err(&pdev->dev,
" %s: Private data get failed\n", __func__);
goto fail;
}
priv->pil_h = subsystem_get("modem");
if (IS_ERR(priv->pil_h)) {
dev_err(&pdev->dev, "%s: pil get failed,\n",
__func__);
goto fail;
}
/* Set the state of the ADSP in APR driver */
apr_set_modem_state(APR_SUBSYS_LOADED);
} else if (adsp_state == APR_SUBSYS_LOADED) {
dev_dbg(&pdev->dev,
"%s: MDSP state = %x\n", __func__, adsp_state);
}
dev_dbg(&pdev->dev, "%s: Q6/MDSP image is loaded\n", __func__);
return;
}
load_adsp:
{
adsp_state = apr_get_q6_state();
if (adsp_state == APR_SUBSYS_DOWN) {
priv = platform_get_drvdata(pdev);
if (!priv) {
dev_err(&pdev->dev,
" %s: Private data get failed\n", __func__);
goto fail;
}
if (!priv->adsp_fw_name) {
dev_dbg(&pdev->dev, "%s: Load default ADSP\n",
__func__);
priv->pil_h = subsystem_get("adsp");
} else {
dev_dbg(&pdev->dev, "%s: Load ADSP with fw name %s\n",
__func__, priv->adsp_fw_name);
priv->pil_h = subsystem_get_with_fwname("adsp", priv->adsp_fw_name);
}
if (IS_ERR(priv->pil_h)) {
dev_err(&pdev->dev, "%s: pil get failed,\n",
__func__);
goto fail;
}
} else if (adsp_state == APR_SUBSYS_LOADED) {
dev_dbg(&pdev->dev,
"%s: ADSP state = %x\n", __func__, adsp_state);
}
dev_dbg(&pdev->dev, "%s: Q6/ADSP image is loaded\n", __func__);
return;
}
fail:
dev_err(&pdev->dev, "%s: Q6 image loading failed\n", __func__);
}
static void adsp_loader_do(struct platform_device *pdev)
{
schedule_work(&adsp_ldr_work);
}
static ssize_t adsp_ssr_store(struct kobject *kobj,
struct kobj_attribute *attr,
const char *buf,
size_t count)
{
int ssr_command = 0;
struct subsys_device *adsp_dev = NULL;
struct platform_device *pdev = adsp_private;
struct adsp_loader_private *priv = NULL;
int rc;
dev_dbg(&pdev->dev, "%s: going to call adsp ssr\n ", __func__);
if (kstrtoint(buf, 10, &ssr_command) < 0)
return -EINVAL;
if (ssr_command != SSR_RESET_CMD)
return -EINVAL;
priv = platform_get_drvdata(pdev);
if (!priv)
return -EINVAL;
adsp_dev = (struct subsys_device *)priv->pil_h;
if (!adsp_dev)
return -EINVAL;
dev_err(&pdev->dev, "requesting for ADSP restart\n");
/* subsystem_restart_dev has worker queue to handle */
rc = subsystem_restart_dev(adsp_dev);
if (rc) {
dev_err(&pdev->dev, "subsystem_restart_dev failed\n");
return rc;
}
dev_dbg(&pdev->dev, "ADSP restarted\n");
return count;
}
static ssize_t adsp_boot_store(struct kobject *kobj,
struct kobj_attribute *attr,
const char *buf,
size_t count)
{
int boot = 0;
if (sscanf(buf, "%du", &boot) != 1) {
pr_err("%s: failed to read boot info from string\n", __func__);
return -EINVAL;
}
if (boot == BOOT_CMD) {
pr_debug("%s: going to call adsp_loader_do\n", __func__);
adsp_loader_do(adsp_private);
} else if (boot == IMAGE_UNLOAD_CMD) {
pr_debug("%s: going to call adsp_unloader\n", __func__);
adsp_loader_unload(adsp_private);
}
return count;
}
static void adsp_loader_unload(struct platform_device *pdev)
{
struct adsp_loader_private *priv = NULL;
priv = platform_get_drvdata(pdev);
if (!priv)
return;
if (priv->pil_h) {
dev_dbg(&pdev->dev, "%s: calling subsystem put\n", __func__);
subsystem_put(priv->pil_h);
priv->pil_h = NULL;
}
}
static int adsp_loader_init_sysfs(struct platform_device *pdev)
{
int ret = -EINVAL;
struct adsp_loader_private *priv = NULL;
adsp_private = NULL;
priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
if (!priv) {
ret = -ENOMEM;
return ret;
}
platform_set_drvdata(pdev, priv);
priv->pil_h = NULL;
priv->boot_adsp_obj = NULL;
priv->attr_group = devm_kzalloc(&pdev->dev,
sizeof(*(priv->attr_group)),
GFP_KERNEL);
if (!priv->attr_group) {
ret = -ENOMEM;
goto error_return;
}
priv->attr_group->attrs = attrs;
priv->boot_adsp_obj = kobject_create_and_add("boot_adsp", kernel_kobj);
if (!priv->boot_adsp_obj) {
dev_err(&pdev->dev, "%s: sysfs create and add failed\n",
__func__);
ret = -ENOMEM;
goto error_return;
}
ret = sysfs_create_group(priv->boot_adsp_obj, priv->attr_group);
if (ret) {
dev_err(&pdev->dev, "%s: sysfs create group failed %d\n",
__func__, ret);
goto error_return;
}
adsp_private = pdev;
return 0;
error_return:
if (priv->boot_adsp_obj) {
kobject_del(priv->boot_adsp_obj);
priv->boot_adsp_obj = NULL;
}
return ret;
}
static int adsp_loader_remove(struct platform_device *pdev)
{
struct adsp_loader_private *priv = NULL;
priv = platform_get_drvdata(pdev);
if (!priv)
return 0;
if (priv->pil_h) {
subsystem_put(priv->pil_h);
priv->pil_h = NULL;
}
if (priv->boot_adsp_obj) {
sysfs_remove_group(priv->boot_adsp_obj, priv->attr_group);
kobject_del(priv->boot_adsp_obj);
priv->boot_adsp_obj = NULL;
}
return 0;
}
static int adsp_loader_probe(struct platform_device *pdev)
{
struct adsp_loader_private *priv = NULL;
struct nvmem_cell *cell;
size_t len;
u32 *buf;
const char **adsp_fw_name_array = NULL;
int adsp_fw_cnt;
u32* adsp_fw_bit_values = NULL;
int i;
int fw_name_size;
u32 adsp_var_idx = 0;
int ret = 0;
ret = adsp_loader_init_sysfs(pdev);
if (ret != 0) {
dev_err(&pdev->dev, "%s: Error in initing sysfs\n", __func__);
return ret;
}
priv = platform_get_drvdata(pdev);
/* get adsp variant idx */
cell = nvmem_cell_get(&pdev->dev, "adsp_variant");
if (IS_ERR_OR_NULL(cell)) {
dev_dbg(&pdev->dev, "%s: FAILED to get nvmem cell \n", __func__);
goto wqueue;
}
buf = nvmem_cell_read(cell, &len);
nvmem_cell_put(cell);
if (IS_ERR_OR_NULL(buf) || len <= 0 || len > sizeof(u32)) {
dev_dbg(&pdev->dev, "%s: FAILED to read nvmem cell \n", __func__);
goto wqueue;
}
memcpy(&adsp_var_idx, buf, len);
kfree(buf);
/* Get count of fw images */
adsp_fw_cnt = of_property_count_strings(pdev->dev.of_node,
"adsp-fw-names");
if (adsp_fw_cnt <= 0 || adsp_fw_cnt > MAX_FW_IMAGES) {
dev_dbg(&pdev->dev, "%s: Invalid number of fw images %d",
__func__, adsp_fw_cnt);
goto wqueue;
}
adsp_fw_bit_values = devm_kzalloc(&pdev->dev,
adsp_fw_cnt * sizeof(u32), GFP_KERNEL);
if (!adsp_fw_bit_values)
goto wqueue;
/* Read bit values corresponding to each firmware image entry */
ret = of_property_read_u32_array(pdev->dev.of_node,
"adsp-fw-bit-values",
adsp_fw_bit_values,
adsp_fw_cnt);
if (ret) {
dev_dbg(&pdev->dev, "%s: unable to read fw-bit-values\n",
__func__);
goto wqueue;
}
adsp_fw_name_array = devm_kzalloc(&pdev->dev,
adsp_fw_cnt * sizeof(char *), GFP_KERNEL);
if (!adsp_fw_name_array)
goto wqueue;
/* Read ADSP firmware image names */
ret = of_property_read_string_array(pdev->dev.of_node,
"adsp-fw-names",
adsp_fw_name_array,
adsp_fw_cnt);
if (ret < 0) {
dev_dbg(&pdev->dev, "%s: unable to read fw-names\n",
__func__);
goto wqueue;
}
for (i = 0; i < adsp_fw_cnt; i++) {
if (adsp_fw_bit_values[i] == adsp_var_idx) {
fw_name_size = strlen(adsp_fw_name_array[i]) + 1;
priv->adsp_fw_name = devm_kzalloc(&pdev->dev,
fw_name_size,
GFP_KERNEL);
if (!priv->adsp_fw_name)
goto wqueue;
strlcpy(priv->adsp_fw_name, adsp_fw_name_array[i],
fw_name_size);
break;
}
}
wqueue:
INIT_WORK(&adsp_ldr_work, adsp_load_fw);
if (adsp_fw_bit_values)
devm_kfree(&pdev->dev, adsp_fw_bit_values);
if (adsp_fw_name_array)
devm_kfree(&pdev->dev, adsp_fw_name_array);
return 0;
}
static const struct of_device_id adsp_loader_dt_match[] = {
{ .compatible = "qcom,adsp-loader" },
{ }
};
MODULE_DEVICE_TABLE(of, adsp_loader_dt_match);
static struct platform_driver adsp_loader_driver = {
.driver = {
.name = "adsp-loader",
.owner = THIS_MODULE,
.of_match_table = adsp_loader_dt_match,
.suppress_bind_attrs = true,
},
.probe = adsp_loader_probe,
.remove = adsp_loader_remove,
};
static int __init adsp_loader_init(void)
{
return platform_driver_register(&adsp_loader_driver);
}
module_init(adsp_loader_init);
static void __exit adsp_loader_exit(void)
{
platform_driver_unregister(&adsp_loader_driver);
}
module_exit(adsp_loader_exit);
MODULE_DESCRIPTION("ADSP Loader module");
MODULE_LICENSE("GPL v2");