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bc1d038eac5003cdc9cab2c363a88dbbc9bebe92
android/drivers/misc/mediatek/scp/v02/scp_helper.c
T
threeeye bc1d038eac REVVL 6 Pro kernel bring-up: full working tree snapshot (2026-09-12) 
Squashed backup commit (no shallow-clone history issues) of
xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2 branch, upstream
commit 9eece662e) plus all fixes applied to get everpal_defconfig building
clean against a modern (GCC 15.2.0) toolchain -- see the previous commit
message on the lineage-23.2 branch (also in this repo history is not
available here since this is a squashed snapshot; full incremental history
lives in the local DL380 checkout and the upstream GitHub remote).

Upstream: https://github.com/xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2)
2026-09-12 13:36:46 +00:00

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/*
* Copyright (C) 2016 MediaTek Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License 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 http://www.gnu.org/licenses/gpl-2.0.html for more details.
*/
#include <linux/module.h> /* needed by all modules */
#include <linux/init.h> /* needed by module macros */
#include <linux/fs.h> /* needed by file_operations* */
#include <linux/miscdevice.h> /* needed by miscdevice* */
#include <linux/sysfs.h>
#include <linux/platform_device.h>
#include <linux/device.h> /* needed by device_* */
#include <linux/vmalloc.h> /* needed by vmalloc */
#include <linux/uaccess.h> /* needed by copy_to_user */
#include <linux/fs.h> /* needed by file_operations* */
#include <linux/slab.h> /* needed by kmalloc */
#include <linux/poll.h> /* needed by poll */
#include <linux/mutex.h>
#include <linux/sched.h>
#include <linux/interrupt.h>
#include <linux/suspend.h>
#include <linux/timer.h>
#include <linux/notifier.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/of_fdt.h>
#include <linux/ioport.h>
#include <linux/io.h>
#include <mt-plat/sync_write.h>
//#include <mt-plat/aee.h>
#include <linux/delay.h>
#include "scp_feature_define.h"
#include "scp_err_info.h"
#include "scp_helper.h"
#include "scp_excep.h"
#include "scp_dvfs.h"
#include "scp_scpctl.h"
#include <linux/syscore_ops.h>
#ifdef CONFIG_OF_RESERVED_MEM
#include <linux/of_reserved_mem.h>
#include "scp_reservedmem_define.h"
#endif
#if ENABLE_SCP_EMI_PROTECTION
#include "memory/mediatek/emi.h"
#endif
/* scp mbox/ipi related */
#include <mt-plat/mtk-mbox.h>
#include "scp_ipi.h"
/* scp semaphore timeout count definition */
#define SEMAPHORE_TIMEOUT 5000
#define SEMAPHORE_3WAY_TIMEOUT 5000
/* scp ready timeout definition */
#define SCP_READY_TIMEOUT (8 * HZ) /* 30 seconds*/
#define SCP_A_TIMER 0
/* scp ipi message buffer */
uint32_t msg_scp_ready0, msg_scp_ready1;
char msg_scp_err_info0[40], msg_scp_err_info1[40];
/* scp ready status for notify*/
unsigned int scp_ready[SCP_CORE_TOTAL];
/* scp enable status*/
unsigned int scp_enable[SCP_CORE_TOTAL];
/* scp dvfs variable*/
unsigned int scp_expected_freq;
unsigned int scp_current_freq;
unsigned int scp_dvfs_cali_ready;
/*scp awake variable*/
int scp_awake_counts[SCP_CORE_TOTAL];
unsigned int scp_recovery_flag[SCP_CORE_TOTAL];
#define SCP_A_RECOVERY_OK 0x44
/* scp_reset_status
* 0: scp not in reset status
* 1: scp in reset status
*/
atomic_t scp_reset_status = ATOMIC_INIT(RESET_STATUS_STOP);
unsigned int scp_reset_by_cmd;
struct scp_region_info_st *scp_region_info;
/* shadow it due to sram may not access during sleep */
struct scp_region_info_st scp_region_info_copy;
struct scp_work_struct scp_sys_reset_work;
struct wakeup_source scp_reset_lock;
DEFINE_SPINLOCK(scp_reset_spinlock);
/* l1c enable */
void __iomem *scp_ap_dram_virt;
void __iomem *scp_loader_virt;
void __iomem *scp_regdump_virt;
phys_addr_t scp_mem_base_phys;
phys_addr_t scp_mem_base_virt;
phys_addr_t scp_mem_size;
struct scp_regs scpreg;
unsigned char *scp_send_buff[SCP_CORE_TOTAL];
unsigned char *scp_recv_buff[SCP_CORE_TOTAL];
static struct workqueue_struct *scp_workqueue;
static struct workqueue_struct *scp_reset_workqueue;
#if SCP_LOGGER_ENABLE
static struct workqueue_struct *scp_logger_workqueue;
#endif
#if SCP_BOOT_TIME_OUT_MONITOR
static struct timer_list scp_ready_timer[SCP_CORE_TOTAL];
#endif
static struct scp_work_struct scp_A_notify_work;
static unsigned int scp_timeout_times;
static DEFINE_MUTEX(scp_A_notify_mutex);
static DEFINE_MUTEX(scp_feature_mutex);
static DEFINE_MUTEX(scp_register_sensor_mutex);
char *core_ids[SCP_CORE_TOTAL] = {"SCP A"};
DEFINE_SPINLOCK(scp_awake_spinlock);
/* set flag after driver initial done */
static bool driver_init_done;
struct scp_ipi_irq {
const char *name;
int order;
unsigned int irq_no;
};
struct scp_ipi_irq scp_ipi_irqs[] = {
/* SCP IPC0 */
{ "mediatek,scp", 0, 0},
/* SCP IPC1 */
{ "mediatek,scp", 1, 0},
/* MBOX_0 */
{ "mediatek,scp", 2, 0},
/* MBOX_1 */
{ "mediatek,scp", 3, 0},
/* MBOX_2 */
{ "mediatek,scp", 4, 0},
/* MBOX_3 */
{ "mediatek,scp", 5, 0},
/* MBOX_4 */
{ "mediatek,scp", 6, 0},
};
#define IRQ_NUMBER (sizeof(scp_ipi_irqs)/sizeof(struct scp_ipi_irq))
static int scp_ipi_syscore_dbg_suspend(void) { return 0; }
static void scp_ipi_syscore_dbg_resume(void)
{
int i;
int ret = 0;
for (i = 0; i < IRQ_NUMBER; i++) {
#ifdef CONFIG_MTK_GIC_V3_EXT
ret = mt_irq_get_pending(scp_ipi_irqs[i].irq_no);
#endif
if (ret) {
if (i < 2)
pr_info("[SCP] ipc%d wakeup\n", i);
else
mt_print_scp_ipi_id(i - 2);
break;
}
}
}
/*
* memory copy to scp sram
* @param trg: trg address
* @param src: src address
* @param size: memory size
*/
void memcpy_to_scp(void __iomem *trg, const void *src, int size)
{
int i;
u32 __iomem *t = trg;
const u32 *s = src;
for (i = 0; i < ((size + 3) >> 2); i++)
*t++ = *s++;
}
/*
* memory copy from scp sram
* @param trg: trg address
* @param src: src address
* @param size: memory size
*/
void memcpy_from_scp(void *trg, const void __iomem *src, int size)
{
int i;
u32 *t = trg;
const u32 __iomem *s = src;
for (i = 0; i < ((size + 3) >> 2); i++)
*t++ = *s++;
}
/*
* acquire a hardware semaphore
* @param flag: semaphore id
* return 0 :get sema success
* 1 :get sema timeout
* -1 :get sema fail, driver not ready
*/
int get_scp_semaphore(int flag)
{
int read_back;
unsigned int cnt;
int ret = SEMAPHORE_FAIL;
unsigned long spin_flags;
/* return -1 to prevent from access when driver not ready */
if (!driver_init_done)
return SEMAPHORE_NOT_INIT;
/* spinlock context safe*/
spin_lock_irqsave(&scp_awake_spinlock, spin_flags);
flag = (flag * 2) + 1;
read_back = (readl(SCP_SEMAPHORE) >> flag) & 0x1;
if (read_back == 0) {
cnt = SEMAPHORE_TIMEOUT;
writel((1 << flag), SCP_SEMAPHORE);
while (cnt-- > 0) {
/* repeat test if we get semaphore */
read_back = (readl(SCP_SEMAPHORE) >> flag) & 0x1;
if (read_back == 1) {
ret = SEMAPHORE_SUCCESS;
break;
}
writel((1 << flag), SCP_SEMAPHORE);
}
if (ret == SEMAPHORE_FAIL)
pr_notice("[SCP] get scp sema. %d TIMEOUT...!\n", flag);
} else {
pr_notice("[SCP] already hold scp sema. %d\n", flag);
}
spin_unlock_irqrestore(&scp_awake_spinlock, spin_flags);
return ret;
}
EXPORT_SYMBOL_GPL(get_scp_semaphore);
/*
* release a hardware semaphore
* @param flag: semaphore id
* return 0 :release sema success
* 1 :release sema fail
* -1 :release sema fail, driver not ready
*/
int release_scp_semaphore(int flag)
{
int read_back;
int ret = SEMAPHORE_FAIL;
unsigned long spin_flags;
/* return -1 to prevent from access when driver not ready */
if (!driver_init_done)
return SEMAPHORE_NOT_INIT;
/* spinlock context safe*/
spin_lock_irqsave(&scp_awake_spinlock, spin_flags);
flag = (flag * 2) + 1;
read_back = (readl(SCP_SEMAPHORE) >> flag) & 0x1;
if (read_back == 1) {
/* Write 1 clear */
writel((1 << flag), SCP_SEMAPHORE);
read_back = (readl(SCP_SEMAPHORE) >> flag) & 0x1;
if (read_back == 0)
ret = SEMAPHORE_SUCCESS;
else
pr_notice("[SCP] release scp sema. %d failed\n", flag);
} else {
pr_notice("[SCP] try to release sema. %d not own by me\n", flag);
}
spin_unlock_irqrestore(&scp_awake_spinlock, spin_flags);
return ret;
}
EXPORT_SYMBOL_GPL(release_scp_semaphore);
/*
* acquire a hardware semaphore
* @param flag: semaphore id
* return 0: get sema success
* 1: get sema timeout
* -1: get sema fail, driver not ready
*/
int scp_get_semaphore_3way(int flag)
{
int ret = SEMAPHORE_FAIL;
unsigned int cnt;
unsigned long spin_flags;
unsigned int read_back;
/* return -1 to prevent from access when driver not ready */
if (!driver_init_done)
return SEMAPHORE_NOT_INIT;
/* spinlock context safe*/
spin_lock_irqsave(&scp_awake_spinlock, spin_flags);
flag = flag * 4 + 2;
read_back = (readl(SCP_3WAY_SEMAPHORE) >> flag) & 0x1;
if (read_back == 0) {
cnt = SEMAPHORE_3WAY_TIMEOUT;
while (cnt-- > 0) {
writel((1 << flag), SCP_3WAY_SEMAPHORE);
read_back = (readl(SCP_3WAY_SEMAPHORE) >> flag) & 0x1;
if (read_back == 1) {
ret = SEMAPHORE_SUCCESS;
break;
}
}
if (ret == SEMAPHORE_FAIL)
pr_notice("[SCP] get scp sema. %d TIMEOUT...!\n", flag);
} else {
pr_notice("[SCP] already hold scp sema. %d\n", flag);
}
spin_unlock_irqrestore(&scp_awake_spinlock, spin_flags);
return ret;
}
EXPORT_SYMBOL_GPL(scp_get_semaphore_3way);
/*
* release a hardware semaphore
* @param flag: semaphore id
* return 0: release sema success
* 1: release sema fail, sem busy
* -1: release sema fail, driver not ready
*/
int scp_release_semaphore_3way(int flag)
{
int ret = SEMAPHORE_FAIL;
unsigned long spin_flags;
unsigned int read_back;
/* return -1 to prevent from access when driver not ready */
if (!driver_init_done)
return SEMAPHORE_NOT_INIT;
/* spinlock context safe*/
spin_lock_irqsave(&scp_awake_spinlock, spin_flags);
flag = flag * 4 + 2;
read_back = (readl(SCP_3WAY_SEMAPHORE) >> flag) & 0x1;
if (read_back == 1) {
writel((1 << flag), SCP_3WAY_SEMAPHORE);
read_back = (readl(SCP_3WAY_SEMAPHORE) >> flag) & 0x1;
if (read_back == 0)
ret = SEMAPHORE_SUCCESS;
else
pr_notice("[SCP] release scp sema. %d failed\n", flag);
} else {
pr_notice("[SCP] try to release sema. %d not own by me\n", flag);
}
spin_unlock_irqrestore(&scp_awake_spinlock, spin_flags);
return ret;
}
EXPORT_SYMBOL_GPL(scp_release_semaphore_3way);
static BLOCKING_NOTIFIER_HEAD(scp_A_notifier_list);
/*
* register apps notification
* NOTE: this function may be blocked
* and should not be called in interrupt context
* @param nb: notifier block struct
*/
void scp_A_register_notify(struct notifier_block *nb)
{
mutex_lock(&scp_A_notify_mutex);
blocking_notifier_chain_register(&scp_A_notifier_list, nb);
pr_debug("[SCP] register scp A notify callback..\n");
if (is_scp_ready(SCP_A_ID))
nb->notifier_call(nb, SCP_EVENT_READY, NULL);
mutex_unlock(&scp_A_notify_mutex);
}
EXPORT_SYMBOL_GPL(scp_A_register_notify);
/*
* unregister apps notification
* NOTE: this function may be blocked
* and should not be called in interrupt context
* @param nb: notifier block struct
*/
void scp_A_unregister_notify(struct notifier_block *nb)
{
mutex_lock(&scp_A_notify_mutex);
blocking_notifier_chain_unregister(&scp_A_notifier_list, nb);
mutex_unlock(&scp_A_notify_mutex);
}
EXPORT_SYMBOL_GPL(scp_A_unregister_notify);
void scp_schedule_work(struct scp_work_struct *scp_ws)
{
queue_work(scp_workqueue, &scp_ws->work);
}
void scp_schedule_reset_work(struct scp_work_struct *scp_ws)
{
queue_work(scp_reset_workqueue, &scp_ws->work);
}
#if SCP_LOGGER_ENABLE
void scp_schedule_logger_work(struct scp_work_struct *scp_ws)
{
queue_work(scp_logger_workqueue, &scp_ws->work);
}
#endif
/*
* callback function for work struct
* notify apps to start their tasks
* or generate an exception according to flag
* NOTE: this function may be blocked
* and should not be called in interrupt context
* @param ws: work struct
*/
static void scp_A_notify_ws(struct work_struct *ws)
{
struct scp_work_struct *sws =
container_of(ws, struct scp_work_struct, work);
unsigned int scp_notify_flag = sws->flags;
if (scp_notify_flag) {
scp_recovery_flag[SCP_A_ID] = SCP_A_RECOVERY_OK;
writel(0xff, SCP_TO_SPM_REG); /* patch: clear SPM interrupt */
mutex_lock(&scp_A_notify_mutex);
#if SCP_RECOVERY_SUPPORT
atomic_set(&scp_reset_status, RESET_STATUS_STOP);
#endif
scp_ready[SCP_A_ID] = 1;
#if SCP_DVFS_INIT_ENABLE
#ifdef ULPOSC_CALI_BY_AP
sync_ulposc_cali_data_to_scp();
#endif
/* release pll clock after scp ulposc calibration */
scp_pll_ctrl_set(PLL_DISABLE, CLK_26M);
#endif
scp_dvfs_cali_ready = 1;
pr_debug("[SCP] notify blocking call\n");
blocking_notifier_call_chain(&scp_A_notifier_list
, SCP_EVENT_READY, NULL);
mutex_unlock(&scp_A_notify_mutex);
}
/*clear reset status and unlock wake lock*/
pr_debug("[SCP] clear scp reset flag and unlock\n");
#ifndef CONFIG_FPGA_EARLY_PORTING
scp_resource_req(SCP_REQ_RELEASE);
#endif // CONFIG_FPGA_EARLY_PORTING
/* register scp dvfs*/
msleep(2000);
__pm_relax(&scp_reset_lock);
scp_register_feature(RTOS_FEATURE_ID);
}
#ifdef SCP_PARAMS_TO_SCP_SUPPORT
/*
* Function/Space for kernel to pass static/initial parameters to scp's driver
* @return: 0 for success, positive for info and negtive for error
*
* Note: The function should be called before disabling 26M & resetting scp.
*
* An example of function instance of sensor_params_to_scp:
int sensor_params_to_scp(phys_addr_t addr_vir, size_t size)
{
int *params;
params = (int *)addr_vir;
params[0] = 0xaaaa;
return 0;
}
*/
static int params_to_scp(void)
{
#ifdef CFG_SENSOR_PARAMS_TO_SCP_SUPPORT
int ret = 0;
scp_region_info = (SCP_TCM + SCP_REGION_INFO_OFFSET);
mt_reg_sync_writel(scp_get_reserve_mem_phys(SCP_DRV_PARAMS_MEM_ID),
&(scp_region_info->ap_params_start));
ret = sensor_params_to_scp(
scp_get_reserve_mem_virt(SCP_DRV_PARAMS_MEM_ID),
scp_get_reserve_mem_size(SCP_DRV_PARAMS_MEM_ID));
return ret;
#else
/* return success, if sensor_params_to_scp is not defined */
return 0;
#endif
}
#endif
/*
* mark notify flag to 1 to notify apps to start their tasks
*/
static void scp_A_set_ready(void)
{
pr_debug("[SCP] %s()\n", __func__);
#if SCP_BOOT_TIME_OUT_MONITOR
del_timer(&scp_ready_timer[SCP_A_ID]);
#endif
scp_A_notify_work.flags = 1;
scp_schedule_work(&scp_A_notify_work);
}
/*
* callback for reset timer
* mark notify flag to 0 to generate an exception
* @param data: unuse
*/
#if SCP_BOOT_TIME_OUT_MONITOR
static void scp_wait_ready_timeout(unsigned long data)
{
#if SCP_RECOVERY_SUPPORT
if (scp_timeout_times < 10)
scp_send_reset_wq(RESET_TYPE_TIMEOUT);
#endif
scp_timeout_times++;
pr_notice("[SCP] scp_timeout_times=%x\n", scp_timeout_times);
}
#endif
/*
* handle notification from scp
* mark scp is ready for running tasks
* It is important to call scp_ram_dump_init() in this IPI handler. This
* timing is necessary to ensure that the region_info has been initialized.
* @param id: ipi id
* @param prdata: ipi handler parameter
* @param data: ipi data
* @param len: length of ipi data
*/
static int scp_A_ready_ipi_handler(unsigned int id, void *prdata, void *data,
unsigned int len)
{
unsigned int scp_image_size = *(unsigned int *)data;
if (!scp_ready[SCP_A_ID]) {
scp_A_set_ready();
}
/*verify scp image size*/
if (scp_image_size != SCP_A_TCM_SIZE) {
pr_err("[SCP]image size ERROR! AP=0x%x,SCP=0x%x\n",
SCP_A_TCM_SIZE, scp_image_size);
WARN_ON(1);
}
pr_debug("[SCP] ramdump init\n");
scp_ram_dump_init();
return 0;
}
/*
* Handle notification from scp.
* Report error from SCP to other kernel driver.
* @param id: ipi id
* @param prdata: ipi handler parameter
* @param data: ipi data
* @param len: length of ipi data
*/
static void scp_err_info_handler(int id, void *prdata, void *data,
unsigned int len)
{
struct error_info *info = (struct error_info *)data;
if (sizeof(*info) != len) {
pr_notice("[SCP] error: incorrect size %d of error_info\n",
len);
WARN_ON(1);
return;
}
/* Ensure the context[] is terminated by the NULL character. */
info->context[ERR_MAX_CONTEXT_LEN - 1] = '\0';
pr_notice("[SCP] Error_info: case id: %u\n", info->case_id);
pr_notice("[SCP] Error_info: sensor id: %u\n", info->sensor_id);
pr_notice("[SCP] Error_info: context: %s\n", info->context);
if (report_hub_dmd)
report_hub_dmd(info->case_id, info->sensor_id, info->context);
else
pr_debug("[SCP] warning: report_hub_dmd() not defined.\n");
}
/*
* @return: 1 if scp is ready for running tasks
*/
unsigned int is_scp_ready(enum scp_core_id id)
{
if (scp_ready[id])
return 1;
else
return 0;
}
EXPORT_SYMBOL_GPL(is_scp_ready);
/*
* reset scp and create a timer waiting for scp notify
* notify apps to stop their tasks if needed
* generate error if reset fail
* NOTE: this function may be blocked
* and should not be called in interrupt context
* @param reset: bit[0-3]=0 for scp enable, =1 for reboot
* bit[4-7]=0 for All, =1 for scp_A, =2 for scp_B
* @return: 0 if success
*/
int reset_scp(int reset)
{
mutex_lock(&scp_A_notify_mutex);
blocking_notifier_call_chain(&scp_A_notifier_list, SCP_EVENT_STOP,
NULL);
mutex_unlock(&scp_A_notify_mutex);
#if SCP_DVFS_INIT_ENABLE
/* request pll clock before turn on scp */
scp_pll_ctrl_set(PLL_ENABLE, CLK_26M);
#endif
if (reset & 0x0f) { /* do reset */
/* make sure scp is in idle state */
scp_reset_wait_timeout();
}
if (scp_enable[SCP_A_ID]) {
/* write scp reserved memory address/size to GRP1/GRP2
* to let scp setup MPU
*/
writel((unsigned int)scp_mem_base_phys, DRAM_RESV_ADDR_REG);
writel((unsigned int)scp_mem_size, DRAM_RESV_SIZE_REG);
writel(1, R_CORE0_SW_RSTN_CLR); /* release reset */
dsb(SY); /* may take lot of time */
#if SCP_BOOT_TIME_OUT_MONITOR
scp_ready_timer[SCP_A_ID].expires = jiffies + SCP_READY_TIMEOUT;
add_timer(&scp_ready_timer[SCP_A_ID]);
#endif
}
pr_debug("[SCP] %s: done\n", __func__);
return 0;
}
/*
* TODO: what should we do when hibernation ?
*/
static int scp_pm_event(struct notifier_block *notifier
, unsigned long pm_event, void *unused)
{
int retval;
switch (pm_event) {
case PM_POST_HIBERNATION:
pr_debug("[SCP] %s: reboot\n", __func__);
retval = reset_scp(SCP_ALL_REBOOT);
if (retval < 0) {
retval = -EINVAL;
pr_debug("[SCP] %s: reboot fail\n", __func__);
}
return NOTIFY_DONE;
}
return NOTIFY_OK;
}
static struct notifier_block scp_pm_notifier_block = {
.notifier_call = scp_pm_event,
.priority = 0,
};
static inline ssize_t scp_A_status_show(struct device *kobj
, struct device_attribute *attr, char *buf)
{
if (scp_ready[SCP_A_ID])
return scnprintf(buf, PAGE_SIZE, "SCP A is ready\n");
else
return scnprintf(buf, PAGE_SIZE, "SCP A is not ready\n");
}
DEVICE_ATTR(scp_A_status, 0444, scp_A_status_show, NULL);
static inline ssize_t scp_A_reg_status_show(struct device *kobj
, struct device_attribute *attr, char *buf)
{
int len = 0;
scp_dump_last_regs();
len += scnprintf(buf + len, PAGE_SIZE - len,
"c0_status = %08x\n", c0_m.status);
len += scnprintf(buf + len, PAGE_SIZE - len,
"c0_pc = %08x\n", c0_m.pc);
len += scnprintf(buf + len, PAGE_SIZE - len,
"c0_lr = %08x\n", c0_m.lr);
len += scnprintf(buf + len, PAGE_SIZE - len,
"c0_sp = %08x\n", c0_m.sp);
len += scnprintf(buf + len, PAGE_SIZE - len,
"c0_pc_latch = %08x\n", c0_m.pc_latch);
len += scnprintf(buf + len, PAGE_SIZE - len,
"c0_lr_latch = %08x\n", c0_m.lr_latch);
len += scnprintf(buf + len, PAGE_SIZE - len,
"c0_sp_latch = %08x\n", c0_m.sp_latch);
len += scnprintf(buf + len, PAGE_SIZE - len,
"c1_status = %08x\n", c1_m.status);
len += scnprintf(buf + len, PAGE_SIZE - len,
"c1_pc = %08x\n", c1_m.pc);
len += scnprintf(buf + len, PAGE_SIZE - len,
"c1_lr = %08x\n", c1_m.lr);
len += scnprintf(buf + len, PAGE_SIZE - len,
"c1_sp = %08x\n", c1_m.sp);
len += scnprintf(buf + len, PAGE_SIZE - len,
"c1_pc_latch = %08x\n", c1_m.pc_latch);
len += scnprintf(buf + len, PAGE_SIZE - len,
"c1_lr_latch = %08x\n", c1_m.lr_latch);
len += scnprintf(buf + len, PAGE_SIZE - len,
"c1_sp_latch = %08x\n", c1_m.sp_latch);
return len;
}
DEVICE_ATTR(scp_A_reg_status, 0444, scp_A_reg_status_show, NULL);
static inline ssize_t scp_A_db_test_trigger(struct device *kobj
, struct device_attribute *attr, const char *buf, size_t count)
{
unsigned int value = 0;
if (!buf || count == 0)
return count;
if (kstrtouint(buf, 10, &value) == 0) {
if (value == 666) {
scp_aed(RESET_TYPE_CMD, SCP_A_ID);
if (scp_ready[SCP_A_ID])
pr_debug("dumping SCP db\n");
else
pr_debug("SCP is not ready, try to dump EE\n");
}
}
return count;
}
DEVICE_ATTR(scp_A_db_test, 0200, NULL, scp_A_db_test_trigger);
#ifdef CONFIG_MTK_ENG_BUILD
static ssize_t scp_ee_show(struct device *kobj
, struct device_attribute *attr, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", scp_ee_enable);
}
static ssize_t scp_ee_ctrl(struct device *kobj
, struct device_attribute *attr, const char *buf, size_t n)
{
unsigned int value = 0;
if (kstrtouint(buf, 10, &value) == 0) {
scp_ee_enable = value;
pr_debug("[SCP] scp_ee_enable = %d(1:enable, 0:disable)\n"
, scp_ee_enable);
}
return n;
}
DEVICE_ATTR(scp_ee_enable, 0644, scp_ee_show, scp_ee_ctrl);
static inline ssize_t scp_A_awake_lock_show(struct device *kobj
, struct device_attribute *attr, char *buf)
{
if (scp_ready[SCP_A_ID]) {
scp_awake_lock((void *)SCP_A_ID);
return scnprintf(buf, PAGE_SIZE, "SCP A awake lock\n");
} else
return scnprintf(buf, PAGE_SIZE, "SCP A is not ready\n");
}
DEVICE_ATTR(scp_A_awake_lock, 0444, scp_A_awake_lock_show, NULL);
static inline ssize_t scp_A_awake_unlock_show(struct device *kobj
, struct device_attribute *attr, char *buf)
{
if (scp_ready[SCP_A_ID]) {
scp_awake_unlock((void *)SCP_A_ID);
return scnprintf(buf, PAGE_SIZE, "SCP A awake unlock\n");
} else
return scnprintf(buf, PAGE_SIZE, "SCP A is not ready\n");
}
DEVICE_ATTR(scp_A_awake_unlock, 0444, scp_A_awake_unlock_show, NULL);
enum ipi_debug_opt {
IPI_TRACKING_OFF,
IPI_TRACKING_ON,
IPIMON_SHOW,
};
static inline ssize_t scp_ipi_test_show(struct device *kobj
, struct device_attribute *attr, char *buf)
{
unsigned int value = 0x5A5A;
int ret;
if (scp_ready[SCP_A_ID]) {
ret = mtk_ipi_send(&scp_ipidev, IPI_OUT_TEST_0, 0, &value,
PIN_OUT_SIZE_TEST_0, 0);
return scnprintf(buf, PAGE_SIZE
, "SCP A ipi send ret=%d\n", ret);
} else
return scnprintf(buf, PAGE_SIZE, "SCP A is not ready\n");
}
static inline ssize_t scp_ipi_debug(struct device *kobj
, struct device_attribute *attr, const char *buf, size_t n)
{
unsigned int opt;
if (kstrtouint(buf, 10, &opt) != 0)
return -EINVAL;
switch (opt) {
case IPI_TRACKING_ON:
case IPI_TRACKING_OFF:
mtk_ipi_tracking(&scp_ipidev, opt);
break;
case IPIMON_SHOW:
ipi_monitor_dump(&scp_ipidev);
break;
default:
pr_info("cmd '%d' is not supported.\n", opt);
break;
}
return n;
}
DEVICE_ATTR(scp_ipi_test, 0644, scp_ipi_test_show, scp_ipi_debug);
#endif
#if SCP_RECOVERY_SUPPORT
void scp_wdt_reset(int cpu_id)
{
switch (cpu_id) {
case 0:
writel(V_INSTANT_WDT, R_CORE0_WDT_CFG);
break;
case 1:
writel(V_INSTANT_WDT, R_CORE1_WDT_CFG);
break;
}
}
EXPORT_SYMBOL(scp_wdt_reset);
/*
* trigger wdt manually (debug use)
* Warning! watch dog may be refresh just after you set
*/
static ssize_t scp_wdt_trigger(struct device *dev
, struct device_attribute *attr, const char *buf, size_t count)
{
unsigned int value = 0;
if (!buf || count == 0)
return count;
pr_debug("[SCP] %s: %8s\n", __func__, buf);
if (kstrtouint(buf, 10, &value) == 0) {
if (value == 666)
scp_wdt_reset(0);
else if (value == 667)
scp_wdt_reset(1);
}
return count;
}
DEVICE_ATTR(wdt_reset, 0200, NULL, scp_wdt_trigger);
/*
* trigger scp reset manually (debug use)
*/
static ssize_t scp_reset_trigger(struct device *dev
, struct device_attribute *attr, const char *buf, size_t n)
{
int magic, trigger, counts;
if (sscanf(buf, "%d %d %d", &magic, &trigger, &counts) != 3)
return -EINVAL;
pr_notice("%s %d %d %d\n", __func__, magic, trigger, counts);
if (magic != 666)
return -EINVAL;
scp_reset_counts = counts;
if (trigger == 1) {
scp_reset_by_cmd = 1;
scp_send_reset_wq(RESET_TYPE_CMD);
}
return n;
}
DEVICE_ATTR(scp_reset, 0200, NULL, scp_reset_trigger);
/*
* trigger wdt manually
* debug use
*/
static ssize_t scp_recovery_flag_r(struct device *dev
, struct device_attribute *attr, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", scp_recovery_flag[SCP_A_ID]);
}
static ssize_t scp_recovery_flag_w(struct device *dev
, struct device_attribute *attr, const char *buf, size_t count)
{
int ret, tmp;
ret = kstrtoint(buf, 10, &tmp);
if (kstrtoint(buf, 10, &tmp) < 0) {
pr_debug("scp_recovery_flag error\n");
return count;
}
scp_recovery_flag[SCP_A_ID] = tmp;
return count;
}
DEVICE_ATTR(recovery_flag, 0600, scp_recovery_flag_r, scp_recovery_flag_w);
#endif
/******************************************************************************
*****************************************************************************/
static struct miscdevice scp_device = {
.minor = MISC_DYNAMIC_MINOR,
.name = "scp",
.fops = &scp_A_log_file_ops
};
/*
* register /dev and /sys files
* @return: 0: success, otherwise: fail
*/
static int create_files(void)
{
int ret;
ret = misc_register(&scp_device);
if (unlikely(ret != 0)) {
pr_err("[SCP] misc register failed\n");
return ret;
}
#if SCP_LOGGER_ENABLE
ret = device_create_file(scp_device.this_device
, &dev_attr_scp_mobile_log);
if (unlikely(ret != 0))
return ret;
ret = device_create_file(scp_device.this_device
, &dev_attr_scp_A_logger_wakeup_AP);
if (unlikely(ret != 0))
return ret;
#ifdef CONFIG_MTK_ENG_BUILD
ret = device_create_file(scp_device.this_device
, &dev_attr_scp_A_mobile_log_UT);
if (unlikely(ret != 0))
return ret;
#endif // CONFIG_MTK_ENG_BUILD
ret = device_create_file(scp_device.this_device
, &dev_attr_scp_A_get_last_log);
if (unlikely(ret != 0))
return ret;
#endif // SCP_LOGGER_ENABLE
ret = device_create_file(scp_device.this_device
, &dev_attr_scp_A_status);
if (unlikely(ret != 0))
return ret;
ret = device_create_bin_file(scp_device.this_device
, &bin_attr_scp_dump);
if (unlikely(ret != 0))
return ret;
ret = device_create_file(scp_device.this_device
, &dev_attr_scp_A_reg_status);
if (unlikely(ret != 0))
return ret;
/*only support debug db test in engineer build*/
ret = device_create_file(scp_device.this_device
, &dev_attr_scp_A_db_test);
if (unlikely(ret != 0))
return ret;
#ifdef CONFIG_MTK_ENG_BUILD
ret = device_create_file(scp_device.this_device
, &dev_attr_scp_ee_enable);
if (unlikely(ret != 0))
return ret;
ret = device_create_file(scp_device.this_device
, &dev_attr_scp_A_awake_lock);
if (unlikely(ret != 0))
return ret;
ret = device_create_file(scp_device.this_device
, &dev_attr_scp_A_awake_unlock);
if (unlikely(ret != 0))
return ret;
/* SCP IPI Debug sysfs*/
ret = device_create_file(scp_device.this_device
, &dev_attr_scp_ipi_test);
if (unlikely(ret != 0))
return ret;
#endif // CONFIG_MTK_ENG_BUILD
#if SCP_RECOVERY_SUPPORT
ret = device_create_file(scp_device.this_device
, &dev_attr_wdt_reset);
if (unlikely(ret != 0))
return ret;
ret = device_create_file(scp_device.this_device
, &dev_attr_scp_reset);
if (unlikely(ret != 0))
return ret;
ret = device_create_file(scp_device.this_device
, &dev_attr_recovery_flag);
if (unlikely(ret != 0))
return ret;
#endif // SCP_RECOVERY_SUPPORT
ret = device_create_file(scp_device.this_device, &dev_attr_log_filter);
if (unlikely(ret != 0))
return ret;
ret = device_create_file(scp_device.this_device
, &dev_attr_scpctl);
if (unlikely(ret != 0))
return ret;
return 0;
}
#if SCP_RESERVED_MEM && defined(CONFIG_OF_RESERVED_MEM)
#define SCP_MEM_RESERVED_KEY "mediatek,reserve-memory-scp_share"
int scp_reserve_mem_of_init(struct reserved_mem *rmem)
{
pr_notice("[SCP]%s %pa %pa\n", __func__, &rmem->base, &rmem->size);
scp_mem_base_phys = (phys_addr_t) rmem->base;
scp_mem_size = (phys_addr_t) rmem->size;
return 0;
}
RESERVEDMEM_OF_DECLARE(scp_reserve_mem_init
, SCP_MEM_RESERVED_KEY, scp_reserve_mem_of_init);
#endif // SCP_RESERVED_MEM && defined(CONFIG_OF_RESERVED_MEM)
phys_addr_t scp_get_reserve_mem_phys(enum scp_reserve_mem_id_t id)
{
if (id >= NUMS_MEM_ID) {
pr_err("[SCP] no reserve memory for %d", id);
return 0;
} else
return scp_reserve_mblock[id].start_phys;
}
EXPORT_SYMBOL_GPL(scp_get_reserve_mem_phys);
phys_addr_t scp_get_reserve_mem_virt(enum scp_reserve_mem_id_t id)
{
if (id >= NUMS_MEM_ID) {
pr_err("[SCP] no reserve memory for %d", id);
return 0;
} else
return scp_reserve_mblock[id].start_virt;
}
EXPORT_SYMBOL_GPL(scp_get_reserve_mem_virt);
phys_addr_t scp_get_reserve_mem_size(enum scp_reserve_mem_id_t id)
{
if (id >= NUMS_MEM_ID) {
pr_err("[SCP] no reserve memory for %d", id);
return 0;
} else
return scp_reserve_mblock[id].size;
}
EXPORT_SYMBOL_GPL(scp_get_reserve_mem_size);
#if SCP_RESERVED_MEM
static int scp_reserve_memory_ioremap(void)
{
unsigned int num = (unsigned int)(sizeof(scp_reserve_mblock)
/ sizeof(scp_reserve_mblock[0]));
enum scp_reserve_mem_id_t id;
phys_addr_t accumlate_memory_size = 0;
if ((scp_mem_base_phys >= (0x90000000ULL)) ||
(scp_mem_base_phys <= 0x0)) {
/* The scp remapped region is fixed, only
* 0x4000_0000ULL ~ 0x8FFF_FFFFULL is accessible.
*/
pr_err("[SCP] Error: Wrong Address (0x%llx)\n",
(uint64_t)scp_mem_base_phys);
//BUG_ON(1);
return -1;
}
if (num != NUMS_MEM_ID) {
pr_err("[SCP] number of entries of reserved memory %u / %u\n",
num, NUMS_MEM_ID);
//BUG_ON(1);
return -1;
}
scp_mem_base_virt = (phys_addr_t)(size_t)ioremap_wc(scp_mem_base_phys,
scp_mem_size);
pr_debug("[SCP] rsrv_phy_base = 0x%llx, len:0x%llx\n",
(uint64_t)scp_mem_base_phys, (uint64_t)scp_mem_size);
pr_debug("[SCP] rsrv_vir_base = 0x%llx, len:0x%llx\n",
(uint64_t)scp_mem_base_virt, (uint64_t)scp_mem_size);
for (id = 0; id < NUMS_MEM_ID; id++) {
scp_reserve_mblock[id].start_phys = scp_mem_base_phys +
accumlate_memory_size;
scp_reserve_mblock[id].start_virt = scp_mem_base_virt +
accumlate_memory_size;
accumlate_memory_size += scp_reserve_mblock[id].size;
#ifdef DEBUG
pr_debug("[SCP] [%d] phys:0x%llx, virt:0x%llx, len:0x%llx\n",
id, (uint64_t)scp_reserve_mblock[id].start_phys,
(uint64_t)scp_reserve_mblock[id].start_virt,
(uint64_t)scp_reserve_mblock[id].size);
#endif // DEBUG
}
#ifdef CONFIG_MTK_ENG_BUILD
BUG_ON(accumlate_memory_size > scp_mem_size);
#endif
#ifdef DEBUG
for (id = 0; id < NUMS_MEM_ID; id++) {
uint64_t start_phys = (uint64_t)scp_get_reserve_mem_phys(id);
uint64_t start_virt = (uint64_t)scp_get_reserve_mem_virt(id);
uint64_t len = (uint64_t)scp_get_reserve_mem_size(id);
pr_notice("[SCP][rsrv_mem-%d] phy:0x%llx - 0x%llx, len:0x%llx\n",
id, start_phys, start_phys + len - 1, len);
pr_notice("[SCP][rsrv_mem-%d] vir:0x%llx - 0x%llx, len:0x%llx\n",
id, start_virt, start_virt + len - 1, len);
}
#endif // DEBUG
return 0;
}
#endif
#if ENABLE_SCP_EMI_PROTECTION
void set_scp_mpu(void)
{
struct emimpu_region_t md_region;
mtk_emimpu_init_region(&md_region, MPU_REGION_ID_SCP_SMEM);
mtk_emimpu_set_addr(&md_region, scp_mem_base_phys,
scp_mem_base_phys + scp_mem_size - 1);
mtk_emimpu_set_apc(&md_region, MPU_DOMAIN_D0,
MTK_EMIMPU_NO_PROTECTION);
mtk_emimpu_set_apc(&md_region, MPU_DOMAIN_D3,
MTK_EMIMPU_NO_PROTECTION);
if (mtk_emimpu_set_protection(&md_region))
pr_notice("[SCP]mtk_emimpu_set_protection fail\n");
mtk_emimpu_free_region(&md_region);
}
#endif
void scp_register_feature(enum feature_id id)
{
uint32_t i;
int ret = 0;
/*prevent from access when scp is down*/
if (!scp_ready[SCP_A_ID]) {
pr_debug("[SCP] %s: not ready, scp=%u\n", __func__,
scp_ready[SCP_A_ID]);
return;
}
/* prevent from access when scp dvfs cali isn't done */
if (!scp_dvfs_cali_ready) {
pr_debug("[SCP] %s: dvfs cali not ready, scp_dvfs_cali=%u\n",
__func__, scp_dvfs_cali_ready);
return;
}
/* because feature_table is a global variable,
* use mutex lock to protect it from accessing in the same time
*/
mutex_lock(&scp_feature_mutex);
for (i = 0; i < NUM_FEATURE_ID; i++) {
if (feature_table[i].feature == id)
feature_table[i].enable = 1;
}
#if SCP_DVFS_INIT_ENABLE
scp_expected_freq = scp_get_freq();
#endif
scp_current_freq = readl(CURRENT_FREQ_REG);
writel(scp_expected_freq, EXPECTED_FREQ_REG);
/* send request only when scp is not down */
if (scp_ready[SCP_A_ID]) {
if (scp_current_freq != scp_expected_freq) {
/* set scp freq. */
#if SCP_DVFS_INIT_ENABLE
ret = scp_request_freq();
#endif
if (ret == -1) {
pr_err("[SCP]%s request_freq fail\n", __func__);
WARN_ON(1);
}
}
} else {
pr_err("[SCP]Not send SCP DVFS request because SCP is down\n");
WARN_ON(1);
}
mutex_unlock(&scp_feature_mutex);
}
void scp_deregister_feature(enum feature_id id)
{
uint32_t i;
int ret = 0;
/* prevent from access when scp is down */
if (!scp_ready[SCP_A_ID]) {
pr_debug("[SCP] %s:not ready, scp=%u\n", __func__,
scp_ready[SCP_A_ID]);
return;
}
/* prevent from access when scp dvfs cali isn't done */
if (!scp_dvfs_cali_ready) {
pr_debug("[SCP] %s: dvfs cali not ready, scp_dvfs_cali=%u\n",
__func__, scp_dvfs_cali_ready);
return;
}
mutex_lock(&scp_feature_mutex);
for (i = 0; i < NUM_FEATURE_ID; i++) {
if (feature_table[i].feature == id)
feature_table[i].enable = 0;
}
#if SCP_DVFS_INIT_ENABLE
scp_expected_freq = scp_get_freq();
#endif
scp_current_freq = readl(CURRENT_FREQ_REG);
writel(scp_expected_freq, EXPECTED_FREQ_REG);
/* send request only when scp is not down */
if (scp_ready[SCP_A_ID]) {
if (scp_current_freq != scp_expected_freq) {
/* set scp freq. */
#if SCP_DVFS_INIT_ENABLE
ret = scp_request_freq();
#endif
if (ret == -1) {
pr_err("[SCP] %s: req_freq fail\n", __func__);
WARN_ON(1);
}
}
} else {
pr_err("[SCP]Not send SCP DVFS request because SCP is down\n");
WARN_ON(1);
}
mutex_unlock(&scp_feature_mutex);
}
/*scp sensor type register*/
void scp_register_sensor(enum feature_id id, enum scp_sensor_id sensor_id)
{
uint32_t i;
/* prevent from access when scp is down */
if (!scp_ready[SCP_A_ID])
return;
if (id != SENS_FEATURE_ID) {
pr_debug("[SCP]register sensor id err");
return;
}
/* because feature_table is a global variable
* use mutex lock to protect it from
* accessing in the same time
*/
mutex_lock(&scp_register_sensor_mutex);
for (i = 0; i < NUM_SENSOR_TYPE; i++) {
if (sensor_type_table[i].feature == sensor_id)
sensor_type_table[i].enable = 1;
}
/* register sensor*/
scp_register_feature(id);
mutex_unlock(&scp_register_sensor_mutex);
}
/*scp sensor type deregister*/
void scp_deregister_sensor(enum feature_id id, enum scp_sensor_id sensor_id)
{
uint32_t i;
/* prevent from access when scp is down */
if (!scp_ready[SCP_A_ID])
return;
if (id != SENS_FEATURE_ID) {
pr_debug("[SCP]deregister sensor id err");
return;
}
/* because feature_table is a global variable
* use mutex lock to protect it from
* accessing in the same time
*/
mutex_lock(&scp_register_sensor_mutex);
for (i = 0; i < NUM_SENSOR_TYPE; i++) {
if (sensor_type_table[i].feature == sensor_id)
sensor_type_table[i].enable = 0;
}
/* deregister sensor*/
scp_deregister_feature(id);
mutex_unlock(&scp_register_sensor_mutex);
}
/*
* apps notification
*/
void scp_extern_notify(enum SCP_NOTIFY_EVENT notify_status)
{
blocking_notifier_call_chain(&scp_A_notifier_list, notify_status, NULL);
}
/*
* reset awake counter
*/
void scp_reset_awake_counts(void)
{
int i;
/* scp ready static flag initialise */
for (i = 0; i < SCP_CORE_TOTAL ; i++)
scp_awake_counts[i] = 0;
}
void scp_awake_init(void)
{
scp_reset_awake_counts();
}
#if SCP_RECOVERY_SUPPORT
/*
* scp_set_reset_status, set and return scp reset status function
* return value:
* 0: scp not in reset status
* 1: scp in reset status
*/
unsigned int scp_set_reset_status(void)
{
unsigned long spin_flags;
spin_lock_irqsave(&scp_reset_spinlock, spin_flags);
if (atomic_read(&scp_reset_status) == RESET_STATUS_START) {
spin_unlock_irqrestore(&scp_reset_spinlock, spin_flags);
return 1;
}
/* scp not in reset status, set it and return*/
atomic_set(&scp_reset_status, RESET_STATUS_START);
spin_unlock_irqrestore(&scp_reset_spinlock, spin_flags);
return 0;
}
/******************************************************************************
*****************************************************************************/
void print_clk_registers(void)
{
void __iomem *cfg = scpreg.cfg;
void __iomem *clkctrl = scpreg.clkctrl;
void __iomem *cfg_core0 = scpreg.cfg_core0;
void __iomem *cfg_core1 = scpreg.cfg_core1;
unsigned int offset;
unsigned int value;
// 0x24000 ~ 0x24160 (inclusive)
for (offset = 0x0000; offset <= 0x0160; offset += 4) {
value = (unsigned int)readl(cfg + offset);
pr_notice("[SCP] cfg[0x%04x]: 0x%08x\n", offset, value);
}
// 0x21000 ~ 0x210120 (inclusive)
for (offset = 0x0000; offset < 0x0120; offset += 4) {
value = (unsigned int)readl(clkctrl + offset);
pr_notice("[SCP] clk[%px]: 0x%08x\n", clkctrl + offset, value);
}
// 0x30000 ~ 0x30114 (inclusive)
for (offset = 0x0000; offset <= 0x0114; offset += 4) {
value = (unsigned int)readl(cfg_core0 + offset);
pr_notice("[SCP] cfg_core0[0x%04x]: 0x%08x\n", offset, value);
}
// 0x40000 ~ 0x40114 (inclusive)
for (offset = 0x0000; offset <= 0x0114; offset += 4) {
value = (unsigned int)readl(cfg_core1 + offset);
pr_notice("[SCP] cfg_core1[0x%04x]: 0x%08x\n", offset, value);
}
}
void scp_reset_wait_timeout(void)
{
uint32_t core0_halt = 0;
uint32_t core1_halt = 0;
/* make sure scp is in idle state */
int timeout = 50; /* max wait 1s */
while (timeout--) {
core0_halt = readl(R_CORE0_STATUS) & B_CORE_HALT;
core1_halt = readl(R_CORE1_STATUS) & B_CORE_HALT;
if (core0_halt && core1_halt) {
/* SCP stops any activities
* and parks at wfi
*/
break;
}
mdelay(20);
}
if (timeout < 0) {
pr_notice("[SCP] reset timeout, still reset scp\n");
pr_notice("[SCP] core0_status = %x, core1_status = %x\n",
readl(R_CORE0_STATUS), readl(R_CORE1_STATUS));
}
}
/*
* callback function for work struct
* NOTE: this function may be blocked
* and should not be called in interrupt context
* @param ws: work struct
*/
void scp_sys_reset_ws(struct work_struct *ws)
{
struct scp_work_struct *sws = container_of(ws
, struct scp_work_struct, work);
unsigned int scp_reset_type = sws->flags;
unsigned long spin_flags;
pr_debug("[SCP] %s(): remain %d times\n", __func__, scp_reset_counts);
/*notify scp functions stop*/
pr_debug("[SCP] %s(): scp_extern_notify\n", __func__);
scp_extern_notify(SCP_EVENT_STOP);
/*
* scp_ready:
* SCP_PLATFORM_STOP = 0,
* SCP_PLATFORM_READY = 1,
*/
scp_ready[SCP_A_ID] = 0;
scp_dvfs_cali_ready = 0;
/* wake lock AP*/
__pm_stay_awake(&scp_reset_lock);
#ifndef CONFIG_FPGA_EARLY_PORTING
/* keep Univpll */
scp_resource_req(SCP_REQ_26M);
#endif // CONFIG_FPGA_EARLY_PORTING
/* print_clk and scp_aed before pll enable to keep ori CLK_SEL */
print_clk_registers();
/*workqueue for scp ee, scp reset by cmd will not trigger scp ee*/
if (scp_reset_by_cmd == 0) {
pr_debug("[SCP] %s(): scp_aed_reset\n", __func__);
scp_aed(scp_reset_type, SCP_A_ID);
}
pr_debug("[SCP] %s(): disable logger\n", __func__);
/* logger disable must after scp_aed() */
scp_logger_init_set(0);
pr_debug("[SCP] %s(): scp_pll_ctrl_set\n", __func__);
/*request pll clock before turn off scp */
#if SCP_DVFS_INIT_ENABLE
scp_pll_ctrl_set(PLL_ENABLE, CLK_26M);
#endif
pr_notice("[SCP] %s(): scp_reset_type %d\n", __func__, scp_reset_type);
/* scp reset by CMD, WDT or awake fail */
if ((scp_reset_type == RESET_TYPE_TIMEOUT) ||
(scp_reset_type == RESET_TYPE_AWAKE)) {
/* stop scp */
writel(1, R_CORE0_SW_RSTN_SET);
writel(1, R_CORE1_SW_RSTN_SET);
dsb(SY); /* may take lot of time */
pr_notice("[SCP] rstn core0 %x core1 %x\n",
readl(R_CORE0_SW_RSTN_SET), readl(R_CORE1_SW_RSTN_SET));
} else {
/* reset type scp WDT or CMD*/
/* make sure scp is in idle state */
scp_reset_wait_timeout();
writel(1, R_CORE0_SW_RSTN_SET);
writel(1, R_CORE1_SW_RSTN_SET);
writel(CORE_REBOOT_OK, SCP_GPR_CORE0_REBOOT);
writel(CORE_REBOOT_OK, SCP_GPR_CORE1_REBOOT);
dsb(SY); /* may take lot of time */
pr_notice("[SCP] rstn core0 %x core1 %x\n",
readl(R_CORE0_SW_RSTN_SET), readl(R_CORE1_SW_RSTN_SET));
}
/* scp reset */
scp_sys_full_reset();
#ifdef SCP_PARAMS_TO_SCP_SUPPORT
/* The function, sending parameters to scp must be anchored before
* 1. disabling 26M, 2. resetting SCP
*/
if (params_to_scp() != 0)
return;
#endif
spin_lock_irqsave(&scp_awake_spinlock, spin_flags);
scp_reset_awake_counts();
spin_unlock_irqrestore(&scp_awake_spinlock, spin_flags);
/* Setup dram reserved address and size for scp*/
writel((unsigned int)scp_mem_base_phys, DRAM_RESV_ADDR_REG);
writel((unsigned int)scp_mem_size, DRAM_RESV_SIZE_REG);
/* start scp */
pr_notice("[SCP] start scp\n");
writel(1, R_CORE0_SW_RSTN_CLR);
pr_notice("[SCP] rstn core0 %x\n", readl(R_CORE0_SW_RSTN_CLR));
dsb(SY); /* may take lot of time */
#if SCP_BOOT_TIME_OUT_MONITOR
mod_timer(&scp_ready_timer[SCP_A_ID], jiffies + SCP_READY_TIMEOUT);
#endif
/* clear scp reset by cmd flag*/
scp_reset_by_cmd = 0;
}
/*
* schedule a work to reset scp
* @param type: exception type
*/
void scp_send_reset_wq(enum SCP_RESET_TYPE type)
{
scp_sys_reset_work.flags = (unsigned int) type;
scp_sys_reset_work.id = SCP_A_ID;
if (scp_reset_counts > 0) {
scp_reset_counts--;
scp_schedule_reset_work(&scp_sys_reset_work);
}
}
#endif
int scp_check_resource(void)
{
/* called by lowpower related function
* main purpose is to ensure main_pll is not disabled
* because scp needs main_pll to run at vcore 1.0 and 354Mhz
* return value:
* 1: main_pll shall be enabled
* 26M shall be enabled, infra shall be enabled
* 0: main_pll may disable, 26M may disable, infra may disable
*/
int scp_resource_status = 0;
#ifdef CONFIG_MACH_MT6799
unsigned long spin_flags;
spin_lock_irqsave(&scp_awake_spinlock, spin_flags);
scp_current_freq = readl(CURRENT_FREQ_REG);
scp_expected_freq = readl(EXPECTED_FREQ_REG);
spin_unlock_irqrestore(&scp_awake_spinlock, spin_flags);
if (scp_expected_freq == FREQ_416MHZ || scp_current_freq == FREQ_416MHZ)
scp_resource_status = 1;
else
scp_resource_status = 0;
#endif
return scp_resource_status;
}
#if SCP_RECOVERY_SUPPORT
void scp_region_info_init(void)
{
/*get scp loader/firmware info from scp sram*/
scp_region_info = (SCP_TCM + SCP_REGION_INFO_OFFSET);
pr_debug("[SCP] scp_region_info = %px\n", scp_region_info);
memcpy_from_scp(&scp_region_info_copy,
scp_region_info, sizeof(scp_region_info_copy));
}
#else
void scp_region_info_init(void) {}
#endif
void scp_recovery_init(void)
{
#if SCP_RECOVERY_SUPPORT
/*create wq for scp reset*/
scp_reset_workqueue = create_singlethread_workqueue("SCP_RESET_WQ");
/*init reset work*/
INIT_WORK(&scp_sys_reset_work.work, scp_sys_reset_ws);
scp_loader_virt = ioremap_wc(
scp_region_info_copy.ap_loader_start,
scp_region_info_copy.ap_loader_size);
pr_debug("[SCP] loader image mem: virt:0x%llx - 0x%llx\n",
(uint64_t)(phys_addr_t)scp_loader_virt,
(uint64_t)(phys_addr_t)scp_loader_virt +
(phys_addr_t)scp_region_info_copy.ap_loader_size);
/*init wake,
*this is for prevent scp pll cpu clock disabled during reset flow
*/
wakeup_source_init(&scp_reset_lock, "scp reset wakelock");
/* init reset by cmd flag */
scp_reset_by_cmd = 0;
scp_regdump_virt = ioremap_wc(
scp_region_info_copy.regdump_start,
scp_region_info_copy.regdump_size);
pr_debug("[SCP] scp_regdump_virt map: 0x%x + 0x%x\n",
scp_region_info_copy.regdump_start,
scp_region_info_copy.regdump_size);
if ((int)(scp_region_info_copy.ap_dram_size) > 0) {
/*if l1c enable, map it (include backup) */
scp_ap_dram_virt = ioremap_wc(
scp_region_info_copy.ap_dram_start,
ROUNDUP(scp_region_info_copy.ap_dram_size, 1024)*4);
pr_debug("[SCP] scp_ap_dram_virt map: 0x%x + 0x%x\n",
scp_region_info_copy.ap_dram_start,
scp_region_info_copy.ap_dram_size);
}
#endif
}
static int scp_device_probe(struct platform_device *pdev)
{
int ret = 0, i = 0;
struct resource *res;
const char *core_status = NULL;
struct device *dev = &pdev->dev;
struct device_node *node;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
scpreg.sram = devm_ioremap_resource(dev, res);
if (IS_ERR((void const *) scpreg.sram)) {
pr_err("[SCP] scpreg.sram error\n");
return -1;
}
scpreg.total_tcmsize = (unsigned int)resource_size(res);
pr_debug("[SCP] sram base = 0x%px %x\n"
, scpreg.sram, scpreg.total_tcmsize);
res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
scpreg.cfg = devm_ioremap_resource(dev, res);
if (IS_ERR((void const *) scpreg.cfg)) {
pr_err("[SCP] scpreg.cfg error\n");
return -1;
}
pr_debug("[SCP] cfg base = 0x%px\n", scpreg.cfg);
res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
scpreg.clkctrl = devm_ioremap_resource(dev, res);
if (IS_ERR((void const *) scpreg.clkctrl)) {
pr_err("[SCP] scpreg.clkctrl error\n");
return -1;
}
pr_debug("[SCP] clkctrl base = 0x%px\n", scpreg.clkctrl);
res = platform_get_resource(pdev, IORESOURCE_MEM, 3);
scpreg.cfg_core0 = devm_ioremap_resource(dev, res);
if (IS_ERR((void const *) scpreg.cfg_core0)) {
pr_debug("[SCP] scpreg.cfg_core0 error\n");
return -1;
}
pr_debug("[SCP] cfg_core0 base = 0x%p\n", scpreg.cfg_core0);
res = platform_get_resource(pdev, IORESOURCE_MEM, 4);
scpreg.cfg_core1 = devm_ioremap_resource(dev, res);
if (IS_ERR((void const *) scpreg.cfg_core1)) {
pr_debug("[SCP] scpreg.cfg_core1 error\n");
return -1;
}
pr_debug("[SCP] cfg_core1 base = 0x%p\n", scpreg.cfg_core1);
res = platform_get_resource(pdev, IORESOURCE_MEM, 5);
scpreg.bus_tracker = devm_ioremap_resource(dev, res);
if (IS_ERR((void const *) scpreg.bus_tracker)) {
pr_debug("[SCP] scpreg.bus_tracker error\n");
return -1;
}
pr_debug("[SCP] bus_tracker base = 0x%p\n", scpreg.bus_tracker);
res = platform_get_resource(pdev, IORESOURCE_MEM, 6);
scpreg.l1cctrl = devm_ioremap_resource(dev, res);
if (IS_ERR((void const *) scpreg.l1cctrl)) {
pr_debug("[SCP] scpreg.l1cctrl error\n");
return -1;
}
pr_debug("[SCP] l1cctrl base = 0x%p\n", scpreg.l1cctrl);
res = platform_get_resource(pdev, IORESOURCE_MEM, 7);
scpreg.cfg_sec = devm_ioremap_resource(dev, res);
if (IS_ERR((void const *) scpreg.cfg_sec)) {
pr_debug("[SCP] scpreg.cfg_sec error\n");
return -1;
}
pr_debug("[SCP] cfg_sec base = 0x%p\n", scpreg.cfg_sec);
of_property_read_u32(pdev->dev.of_node, "scp_sramSize"
, &scpreg.scp_tcmsize);
if (!scpreg.scp_tcmsize) {
pr_err("[SCP] total_tcmsize not found\n");
return -ENODEV;
}
pr_debug("[SCP] scpreg.scp_tcmsize = %d\n", scpreg.scp_tcmsize);
/* scp core 0 */
if (of_property_read_string(pdev->dev.of_node, "core_0", &core_status))
return -1;
if (strcmp(core_status, "enable") != 0)
pr_err("[SCP] core_0 not enable\n");
else {
pr_debug("[SCP] core_0 enable\n");
scp_enable[SCP_A_ID] = 1;
}
scpreg.irq = platform_get_irq_byname(pdev, "ipc0");
ret = request_irq(scpreg.irq, scp_A_irq_handler,
IRQF_TRIGGER_NONE, "SCP IPC0", NULL);
if (ret) {
pr_err("[SCP]ipc0 require irq fail %d %d\n", scpreg.irq, ret);
//goto err;
}
pr_debug("ipc0 %d\n", scpreg.irq);
scpreg.irq = platform_get_irq_byname(pdev, "ipc1");
ret = request_irq(scpreg.irq, scp_A_irq_handler,
IRQF_TRIGGER_NONE, "SCP IPC1", NULL);
if (ret) {
pr_err("[SCP]ipc1 require irq fail %d %d\n", scpreg.irq, ret);
//goto err;
}
pr_debug("ipc1 %d\n", scpreg.irq);
/* create mbox dev */
pr_debug("[SCP] mbox mbox probe\n");
for (i = 0; i < SCP_MBOX_TOTAL; i++) {
scp_mbox_info[i].mbdev = &scp_mboxdev;
mtk_mbox_probe(pdev, scp_mbox_info[i].mbdev, i);
mbox_setup_pin_table(i);
}
for (i = 0; i < IRQ_NUMBER; i++) {
if (scp_ipi_irqs[i].name == NULL)
continue;
node = of_find_compatible_node(NULL, NULL,
scp_ipi_irqs[i].name);
if (!node) {
pr_info("[SCP] find '%s' node failed\n",
scp_ipi_irqs[i].name);
continue;
}
scp_ipi_irqs[i].irq_no =
irq_of_parse_and_map(node, scp_ipi_irqs[i].order);
if (!scp_ipi_irqs[i].irq_no)
pr_info("[SCP] get '%s' fail\n", scp_ipi_irqs[i].name);
}
ret = mtk_ipi_device_register(&scp_ipidev, pdev, &scp_mboxdev,
SCP_IPI_COUNT);
if (ret)
pr_err("[SCP] ipi_dev_register fail, ret %d\n", ret);
#if SCP_DVFS_INIT_ENABLE && defined(ULPOSC_CALI_BY_AP)
ulposc_cali_init();
#endif
return ret;
}
static int scp_device_remove(struct platform_device *dev)
{
return 0;
}
static int scpsys_device_probe(struct platform_device *pdev)
{
int ret = 0;
struct resource *res;
struct device *dev = &pdev->dev;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
scpreg.scpsys = devm_ioremap_resource(dev, res);
pr_debug("[SCP] scpreg.scpsys = %p\n", scpreg.scpsys);
if (IS_ERR((void const *) scpreg.scpsys)) {
pr_err("[SCP] scpreg.sram error\n");
return -1;
}
return ret;
}
static int scpsys_device_remove(struct platform_device *dev)
{
return 0;
}
static const struct of_device_id scp_of_ids[] = {
{ .compatible = "mediatek,scp", },
{}
};
static struct platform_driver mtk_scp_device = {
.probe = scp_device_probe,
.remove = scp_device_remove,
.driver = {
.name = "scp",
.owner = THIS_MODULE,
#ifdef CONFIG_OF
.of_match_table = scp_of_ids,
#endif
},
};
static const struct of_device_id scpsys_of_ids[] = {
{ .compatible = "mediatek,scpsys", },
{}
};
static struct platform_driver mtk_scpsys_device = {
.probe = scpsys_device_probe,
.remove = scpsys_device_remove,
.driver = {
.name = "scpsys",
.owner = THIS_MODULE,
#ifdef CONFIG_OF
.of_match_table = scpsys_of_ids,
#endif
},
};
static struct syscore_ops scp_ipi_dbg_syscore_ops = {
.suspend = scp_ipi_syscore_dbg_suspend,
.resume = scp_ipi_syscore_dbg_resume,
};
/*
* driver initialization entry point
*/
static int __init scp_init(void)
{
int ret = 0;
int i = 0;
#if SCP_BOOT_TIME_OUT_MONITOR
init_timer(&scp_ready_timer[SCP_A_ID]);
scp_ready_timer[SCP_A_ID].function = &scp_wait_ready_timeout;
scp_ready_timer[SCP_A_ID].data = (unsigned long) SCP_A_TIMER;
#endif
/* scp platform initialise */
pr_debug("[SCP2] %s begins\n", __func__);
/* scp ready static flag initialise */
for (i = 0; i < SCP_CORE_TOTAL ; i++) {
scp_enable[i] = 0;
scp_ready[i] = 0;
}
scp_dvfs_cali_ready = 0;
#if SCP_DVFS_INIT_ENABLE
scp_dvfs_init();
wait_scp_dvfs_init_done();
/* pll maybe gate, request pll before access any scp reg/sram */
scp_pll_ctrl_set(PLL_ENABLE, CLK_26M);
#endif
#ifndef CONFIG_FPGA_EARLY_PORTING
/* keep Univpll */
scp_resource_req(SCP_REQ_26M);
#endif // CONFIG_FPGA_EARLY_PORTING
#if SCP_RESERVED_MEM && defined(CONFIG_OF_RESERVED_MEM)
/* make sure the reserved memory for scp is ready */
if (scp_mem_size == 0) {
pr_err("[SCP]Reserving memory by of_device for SCP failed.\n");
return -1;
}
#endif // SCP_RESERVED_MEM && defined(CONFIG_OF_RESERVED_MEM)
if (platform_driver_register(&mtk_scp_device))
pr_err("[SCP] scp probe fail\n");
if (platform_driver_register(&mtk_scpsys_device))
pr_err("[SCP] scpsys probe fail\n");
/* skip initial if dts status = "disable" */
if (!scp_enable[SCP_A_ID]) {
pr_err("[SCP] scp disabled!!\n");
goto err;
}
/* scp platform initialise */
scp_region_info_init();
pr_debug("[SCP] platform init\n");
scp_awake_init();
scp_workqueue = create_singlethread_workqueue("SCP_WQ");
ret = scp_excep_init();
if (ret) {
pr_err("[SCP]Excep Init Fail\n");
goto err;
}
INIT_WORK(&scp_A_notify_work.work, scp_A_notify_ws);
scp_legacy_ipi_init();
mtk_ipi_register(&scp_ipidev, IPI_IN_SCP_READY_0,
(void *)scp_A_ready_ipi_handler, NULL, &msg_scp_ready0);
mtk_ipi_register(&scp_ipidev, IPI_IN_SCP_READY_1,
(void *)scp_A_ready_ipi_handler, NULL, &msg_scp_ready1);
mtk_ipi_register(&scp_ipidev, IPI_IN_SCP_ERROR_INFO_0,
(void *)scp_err_info_handler, NULL, msg_scp_err_info0);
mtk_ipi_register(&scp_ipidev, IPI_IN_SCP_ERROR_INFO_1,
(void *)scp_err_info_handler, NULL, msg_scp_err_info1);
ret = register_pm_notifier(&scp_pm_notifier_block);
if (ret)
pr_err("[SCP] failed to register PM notifier %d\n", ret);
/* scp sysfs initialise */
pr_debug("[SCP] sysfs init\n");
ret = create_files();
if (unlikely(ret != 0)) {
pr_err("[SCP] create files failed\n");
goto err;
}
#if SCP_RESERVED_MEM
/*scp resvered memory*/
pr_notice("[SCP] scp_reserve_memory_ioremap\n");
ret = scp_reserve_memory_ioremap();
if (ret) {
pr_err("[SCP]scp_reserve_memory_ioremap failed\n");
goto err;
}
#endif
#if SCP_LOGGER_ENABLE
/* scp logger initialise */
pr_debug("[SCP] logger init\n");
/*create wq for scp logger*/
scp_logger_workqueue = create_singlethread_workqueue("SCP_LOG_WQ");
if (scp_logger_init(scp_get_reserve_mem_virt(SCP_A_LOGGER_MEM_ID),
scp_get_reserve_mem_size(SCP_A_LOGGER_MEM_ID)) == -1) {
pr_err("[SCP] scp_logger_init_fail\n");
goto err;
}
#endif
scp_recovery_init();
#ifdef SCP_PARAMS_TO_SCP_SUPPORT
/* The function, sending parameters to scp must be anchored before
* 1. disabling 26M, 2. resetting SCP
*/
if (params_to_scp() != 0)
goto err;
#endif
#if SCP_DVFS_INIT_ENABLE
/* remember to release pll */
scp_pll_ctrl_set(PLL_DISABLE, CLK_26M);
#endif
register_syscore_ops(&scp_ipi_dbg_syscore_ops);
driver_init_done = true;
reset_scp(SCP_ALL_ENABLE);
#if SCP_DVFS_INIT_ENABLE
/* set default VCORE request if SCP DVFS feature is OFF */
if (scp_dvfs_flag != 1)
scp_vcore_request(CLK_OPP0);
#endif
return ret;
err:
#if SCP_DVFS_INIT_ENABLE
/* remember to release pll */
scp_pll_ctrl_set(PLL_DISABLE, CLK_26M);
#endif
return -1;
}
/*
* driver exit point
*/
static void __exit scp_exit(void)
{
#if SCP_BOOT_TIME_OUT_MONITOR
int i = 0;
#endif
#if SCP_DVFS_INIT_ENABLE
scp_dvfs_exit();
#endif
#if SCP_LOGGER_ENABLE
scp_logger_uninit();
#endif
free_irq(scpreg.irq, NULL);
misc_deregister(&scp_device);
flush_workqueue(scp_workqueue);
destroy_workqueue(scp_workqueue);
#if SCP_RECOVERY_SUPPORT
flush_workqueue(scp_reset_workqueue);
destroy_workqueue(scp_reset_workqueue);
#endif
#if SCP_LOGGER_ENABLE
flush_workqueue(scp_logger_workqueue);
destroy_workqueue(scp_logger_workqueue);
#endif
#if SCP_BOOT_TIME_OUT_MONITOR
for (i = 0; i < SCP_CORE_TOTAL ; i++)
del_timer(&scp_ready_timer[i]);
#endif
}
static int __init scp_late_init(void)
{
pr_notice("[SCP] %s\n", __func__);
#if ENABLE_SCP_EMI_PROTECTION
set_scp_mpu();
#endif
return 0;
}
module_init(scp_init);
module_exit(scp_exit);
late_initcall(scp_late_init);
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