M7350/kernel/drivers/soc/qcom/pil-q6v5-mss.c

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2024-09-09 08:57:42 +00:00
/*
* Copyright (c) 2012-2015, 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.
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/iopoll.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/sched.h>
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/of.h>
#include <linux/regulator/consumer.h>
#include <linux/interrupt.h>
#include <linux/dma-mapping.h>
#include <linux/of_gpio.h>
#include <linux/clk/msm-clk.h>
#include <soc/qcom/subsystem_restart.h>
#include <soc/qcom/ramdump.h>
#include <soc/qcom/smem.h>
#include <soc/qcom/smsm.h>
#include "peripheral-loader.h"
#include "pil-q6v5.h"
#include "pil-msa.h"
#define MAX_VDD_MSS_UV 1150000
#define PROXY_TIMEOUT_MS 10000
#define MAX_SSR_REASON_LEN 81U
#define STOP_ACK_TIMEOUT_MS 1000
#define subsys_to_drv(d) container_of(d, struct modem_data, subsys_desc)
static void log_modem_sfr(void)
{
u32 size;
char *smem_reason, reason[MAX_SSR_REASON_LEN];
smem_reason = smem_get_entry_no_rlock(SMEM_SSR_REASON_MSS0, &size, 0,
SMEM_ANY_HOST_FLAG);
if (!smem_reason || !size) {
pr_err("modem subsystem failure reason: (unknown, smem_get_entry_no_rlock failed).\n");
return;
}
if (!smem_reason[0]) {
pr_err("modem subsystem failure reason: (unknown, empty string found).\n");
return;
}
strlcpy(reason, smem_reason, min(size, MAX_SSR_REASON_LEN));
pr_err("modem subsystem failure reason: %s.\n", reason);
smem_reason[0] = '\0';
wmb();
}
static void restart_modem(struct modem_data *drv)
{
log_modem_sfr();
drv->ignore_errors = true;
subsystem_restart_dev(drv->subsys);
}
static irqreturn_t modem_err_fatal_intr_handler(int irq, void *dev_id)
{
struct modem_data *drv = subsys_to_drv(dev_id);
/* Ignore if we're the one that set the force stop GPIO */
if (drv->crash_shutdown)
return IRQ_HANDLED;
pr_err("Fatal error on the modem.\n");
subsys_set_crash_status(drv->subsys, true);
restart_modem(drv);
return IRQ_HANDLED;
}
static irqreturn_t modem_stop_ack_intr_handler(int irq, void *dev_id)
{
struct modem_data *drv = subsys_to_drv(dev_id);
pr_info("Received stop ack interrupt from modem\n");
complete(&drv->stop_ack);
return IRQ_HANDLED;
}
static int modem_shutdown(const struct subsys_desc *subsys, bool force_stop)
{
struct modem_data *drv = subsys_to_drv(subsys);
unsigned long ret;
if (subsys->is_not_loadable)
return 0;
if (!subsys_get_crash_status(drv->subsys) && force_stop &&
subsys->force_stop_gpio) {
gpio_set_value(subsys->force_stop_gpio, 1);
ret = wait_for_completion_timeout(&drv->stop_ack,
msecs_to_jiffies(STOP_ACK_TIMEOUT_MS));
if (!ret)
pr_warn("Timed out on stop ack from modem.\n");
gpio_set_value(subsys->force_stop_gpio, 0);
}
if (drv->subsys_desc.ramdump_disable_gpio) {
drv->subsys_desc.ramdump_disable = gpio_get_value(
drv->subsys_desc.ramdump_disable_gpio);
pr_warn("Ramdump disable gpio value is %d\n",
drv->subsys_desc.ramdump_disable);
}
pil_shutdown(&drv->q6->desc);
return 0;
}
static int modem_powerup(const struct subsys_desc *subsys)
{
struct modem_data *drv = subsys_to_drv(subsys);
if (subsys->is_not_loadable)
return 0;
/*
* At this time, the modem is shutdown. Therefore this function cannot
* run concurrently with the watchdog bite error handler, making it safe
* to unset the flag below.
*/
reinit_completion(&drv->stop_ack);
drv->subsys_desc.ramdump_disable = 0;
drv->ignore_errors = false;
drv->q6->desc.fw_name = subsys->fw_name;
return pil_boot(&drv->q6->desc);
}
static void modem_crash_shutdown(const struct subsys_desc *subsys)
{
struct modem_data *drv = subsys_to_drv(subsys);
drv->crash_shutdown = true;
if (!subsys_get_crash_status(drv->subsys) &&
subsys->force_stop_gpio) {
gpio_set_value(subsys->force_stop_gpio, 1);
mdelay(STOP_ACK_TIMEOUT_MS);
}
}
static int modem_ramdump(int enable, const struct subsys_desc *subsys)
{
struct modem_data *drv = subsys_to_drv(subsys);
int ret;
if (!enable)
return 0;
ret = pil_mss_make_proxy_votes(&drv->q6->desc);
if (ret)
return ret;
ret = pil_mss_reset_load_mba(&drv->q6->desc);
if (ret)
return ret;
ret = pil_do_ramdump(&drv->q6->desc, drv->ramdump_dev);
if (ret < 0)
pr_err("Unable to dump modem fw memory (rc = %d).\n", ret);
ret = __pil_mss_deinit_image(&drv->q6->desc, false);
if (ret < 0)
pr_err("Unable to free up resources (rc = %d).\n", ret);
pil_mss_remove_proxy_votes(&drv->q6->desc);
return ret;
}
static irqreturn_t modem_wdog_bite_intr_handler(int irq, void *dev_id)
{
struct modem_data *drv = subsys_to_drv(dev_id);
if (drv->ignore_errors)
return IRQ_HANDLED;
pr_err("Watchdog bite received from modem software!\n");
if (drv->subsys_desc.system_debug &&
!gpio_get_value(drv->subsys_desc.err_fatal_gpio))
panic("%s: System ramdump requested. Triggering device restart!\n",
__func__);
subsys_set_crash_status(drv->subsys, true);
restart_modem(drv);
return IRQ_HANDLED;
}
static int pil_subsys_init(struct modem_data *drv,
struct platform_device *pdev)
{
int ret;
drv->subsys_desc.name = "modem";
drv->subsys_desc.dev = &pdev->dev;
drv->subsys_desc.owner = THIS_MODULE;
drv->subsys_desc.shutdown = modem_shutdown;
drv->subsys_desc.powerup = modem_powerup;
drv->subsys_desc.ramdump = modem_ramdump;
drv->subsys_desc.crash_shutdown = modem_crash_shutdown;
drv->subsys_desc.err_fatal_handler = modem_err_fatal_intr_handler;
drv->subsys_desc.stop_ack_handler = modem_stop_ack_intr_handler;
drv->subsys_desc.wdog_bite_handler = modem_wdog_bite_intr_handler;
drv->subsys = subsys_register(&drv->subsys_desc);
if (IS_ERR(drv->subsys)) {
ret = PTR_ERR(drv->subsys);
goto err_subsys;
}
drv->ramdump_dev = create_ramdump_device("modem", &pdev->dev);
if (!drv->ramdump_dev) {
pr_err("%s: Unable to create a modem ramdump device.\n",
__func__);
ret = -ENOMEM;
goto err_ramdump;
}
return 0;
err_ramdump:
subsys_unregister(drv->subsys);
err_subsys:
return ret;
}
static int pil_mss_loadable_init(struct modem_data *drv,
struct platform_device *pdev)
{
struct q6v5_data *q6;
struct pil_desc *q6_desc;
struct resource *res;
struct property *prop;
int ret;
q6 = pil_q6v5_init(pdev);
if (IS_ERR_OR_NULL(q6))
return PTR_ERR(q6);
drv->q6 = q6;
drv->xo = q6->xo;
q6_desc = &q6->desc;
q6_desc->owner = THIS_MODULE;
q6_desc->proxy_timeout = PROXY_TIMEOUT_MS;
q6_desc->ops = &pil_msa_mss_ops;
q6->self_auth = of_property_read_bool(pdev->dev.of_node,
"qcom,pil-self-auth");
if (q6->self_auth) {
res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
"rmb_base");
q6->rmb_base = devm_ioremap_resource(&pdev->dev, res);
if (!q6->rmb_base)
return -ENOMEM;
drv->rmb_base = q6->rmb_base;
q6_desc->ops = &pil_msa_mss_ops_selfauth;
}
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "restart_reg");
if (!res) {
res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
"restart_reg_sec");
q6->restart_reg_sec = true;
}
q6->restart_reg = devm_ioremap_resource(&pdev->dev, res);
if (!q6->restart_reg)
return -ENOMEM;
q6->vreg = NULL;
prop = of_find_property(pdev->dev.of_node, "vdd_mss-supply", NULL);
if (prop) {
q6->vreg = devm_regulator_get(&pdev->dev, "vdd_mss");
if (IS_ERR(q6->vreg))
return PTR_ERR(q6->vreg);
ret = regulator_set_voltage(q6->vreg, VDD_MSS_UV,
MAX_VDD_MSS_UV);
if (ret)
dev_err(&pdev->dev, "Failed to set vreg voltage.\n");
ret = regulator_set_optimum_mode(q6->vreg, 100000);
if (ret < 0) {
dev_err(&pdev->dev, "Failed to set vreg mode.\n");
return ret;
}
}
q6->vreg_mx = devm_regulator_get(&pdev->dev, "vdd_mx");
if (IS_ERR(q6->vreg_mx))
return PTR_ERR(q6->vreg_mx);
prop = of_find_property(pdev->dev.of_node, "vdd_mx-uV", NULL);
if (!prop) {
dev_err(&pdev->dev, "Missing vdd_mx-uV property\n");
return -EINVAL;
}
res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
"cxrail_bhs_reg");
if (res)
q6->cxrail_bhs = devm_ioremap(&pdev->dev, res->start,
resource_size(res));
q6->ahb_clk = devm_clk_get(&pdev->dev, "iface_clk");
if (IS_ERR(q6->ahb_clk))
return PTR_ERR(q6->ahb_clk);
q6->axi_clk = devm_clk_get(&pdev->dev, "bus_clk");
if (IS_ERR(q6->axi_clk))
return PTR_ERR(q6->axi_clk);
q6->rom_clk = devm_clk_get(&pdev->dev, "mem_clk");
if (IS_ERR(q6->rom_clk))
return PTR_ERR(q6->rom_clk);
/* Optional. */
if (of_property_match_string(pdev->dev.of_node,
"qcom,active-clock-names", "gpll0_mss_clk") >= 0)
q6->gpll0_mss_clk = devm_clk_get(&pdev->dev, "gpll0_mss_clk");
if (of_property_match_string(pdev->dev.of_node,
"qcom,active-clock-names", "snoc_axi_clk") >= 0)
q6->snoc_axi_clk = devm_clk_get(&pdev->dev, "snoc_axi_clk");
if (of_property_match_string(pdev->dev.of_node,
"qcom,active-clock-names", "mnoc_axi_clk") >= 0)
q6->mnoc_axi_clk = devm_clk_get(&pdev->dev, "mnoc_axi_clk");
ret = pil_desc_init(q6_desc);
return ret;
}
static int pil_mss_driver_probe(struct platform_device *pdev)
{
struct modem_data *drv;
int ret, is_not_loadable;
drv = devm_kzalloc(&pdev->dev, sizeof(*drv), GFP_KERNEL);
if (!drv)
return -ENOMEM;
platform_set_drvdata(pdev, drv);
is_not_loadable = of_property_read_bool(pdev->dev.of_node,
"qcom,is-not-loadable");
if (is_not_loadable) {
drv->subsys_desc.is_not_loadable = 1;
} else {
ret = pil_mss_loadable_init(drv, pdev);
if (ret)
return ret;
}
init_completion(&drv->stop_ack);
return pil_subsys_init(drv, pdev);
}
static int pil_mss_driver_exit(struct platform_device *pdev)
{
struct modem_data *drv = platform_get_drvdata(pdev);
subsys_unregister(drv->subsys);
destroy_ramdump_device(drv->ramdump_dev);
pil_desc_release(&drv->q6->desc);
return 0;
}
static struct of_device_id mss_match_table[] = {
{ .compatible = "qcom,pil-q6v5-mss" },
{ .compatible = "qcom,pil-q6v55-mss" },
{ .compatible = "qcom,pil-q6v56-mss" },
{}
};
static struct platform_driver pil_mss_driver = {
.probe = pil_mss_driver_probe,
.remove = pil_mss_driver_exit,
.driver = {
.name = "pil-q6v5-mss",
.of_match_table = mss_match_table,
.owner = THIS_MODULE,
},
};
static int __init pil_mss_init(void)
{
return platform_driver_register(&pil_mss_driver);
}
module_init(pil_mss_init);
static void __exit pil_mss_exit(void)
{
platform_driver_unregister(&pil_mss_driver);
}
module_exit(pil_mss_exit);
MODULE_DESCRIPTION("Support for booting modem subsystems with QDSP6v5 Hexagon processors");
MODULE_LICENSE("GPL v2");