2024年10月3日发(作者：昝元亮)
/* Needed to bypass debug image on some chips */
if (!is_scm_armv8())
ret = scm_call_atomic2(SCM_SVC_BOOT,
SCM_WDOG_DEBUG_BOOT_PART, 1, 0);
else
ret = scm_call2_atomic(SCM_SIP_FNID(SCM_SVC_BOOT,
SCM_WDOG_DEBUG_BOOT_PART), &desc);
if (ret)
pr_err("Failed to disable secure wdog debug: %dn", ret);
halt_spmi_pmic_arbiter();
deassert_ps_hold();
mdelay(10000);
}
msm_restart_prepare(cmd); 参数为("recovery")
kernel/drivers/power/reset/msm-poweroff.c
static void msm_restart_prepare(const char *cmd)
{
#ifdef CONFIG_MSM_SUBSYSTEM_RESTART
extern char panic_subsystem[];
#endif /* CONFIG_MSM_SUBSYSTEM_RESTART */
bool need_warm_reset = false;
#ifdef CONFIG_MSM_DLOAD_MODE
/* Write download mode flags if we're panic'ing
* Write download mode flags if restart_mode says so
* Kill download mode if master-kill switch is set
*/
set_dload_mode(download_mode &&
(in_panic || restart_mode == RESTART_DLOAD));
#endif
if (qpnp_pon_check_hard_reset_stored()) {
/* Set warm reset as true when device is in dload mode
* or device doesn't boot up into recovery, bootloader or rtc.
*/
if (get_dload_mode() ||
((cmd != NULL && cmd[0] != '0') &&
strcmp(cmd, "recovery") &&
strcmp(cmd, "bootloader") &&
strcmp(cmd, "rtc")))
need_warm_reset = true;
} else {
need_warm_reset = (get_dload_mode() ||
(cmd != NULL && cmd[0] != '0'));
}
/* Hard reset the PMIC unless memory contents must be maintained. */
if (need_warm_reset || restart_mode == RESTART_DLOAD) {// MODIFIED by , 2016-03-21, BUG-1761259
qpnp_pon_system_pwr_off(PON_POWER_OFF_WARM_RESET);
} else {
qpnp_pon_system_pwr_off(PON_POWER_OFF_HARD_RESET);
}
if (cmd != NULL) {
if (!strncmp(cmd, "bootloader", 10)) {
qpnp_pon_set_restart_reason(
PON_RESTART_REASON_BOOTLOADER);
__raw_writel(0x77665500, restart_reason);
} else if (!strncmp(cmd, "recovery", 8)) {
qpnp_pon_set_restart_reason(
PON_RESTART_REASON_RECOVERY);
__raw_writel(0x77665502, restart_reason); //********************
else if (!strcmp(cmd, "rtc")) {
qpnp_pon_set_restart_reason(
PON_RESTART_REASON_RTC);
__raw_writel(0x77665503, restart_reason);
} else if (!strncmp(cmd, "oem-", 4)) {
unsigned long code;
int ret;
ret = kstrtoul(cmd + 4, 16, &code);
if (!ret)
__raw_writel(0x6f656d00 | (code & 0xff),
restart_reason);
if (download_mode && (code & 0xff) == 0x3a)
set_dload_mode(1);
} else if (!strncmp(cmd, "edl", 3)) {
enable_emergency_dload_mode();
} else {
__raw_writel(0x77665501, restart_reason);
}
}
#ifdef CONFIG_MSM_SUBSYSTEM_RESTART
if (in_panic) {
printk(KERN_ERR "subsystem %s crashn", panic_subsystem);
if (!memcmp(panic_subsystem, "modem", 5)) {
__raw_writel(0x6f656dc1, restart_reason);
} else if (!memcmp(panic_subsystem, "wcnss", 5)) {
__raw_writel(0x6f656dc2, restart_reason);
} else if (!memcmp(panic_subsystem, "adsp", 4) || !memcmp(panic_subsystem, "ADSP", 4)) {
__raw_writel(0x6f656dc3, restart_reason);
} else if (!memcmp(panic_subsystem, "venus", 5)) {
__raw_writel(0x6f656dc4, restart_reason);
} else {
__raw_writel(0x6f656dc0, restart_reason);
}
if (download_mode)
set_dload_mode(1);
}
#endif /* CONFIG_MSM_SUBSYSTEM_RESTART */
//add begin by ,Powering on mode switch to 9008 mode,task:665748
if (restart_mode == RESTART_DLOAD) {
enable_emergency_dload_mode();
}
//add end by
2024年10月3日发(作者：昝元亮)
/* Needed to bypass debug image on some chips */
if (!is_scm_armv8())
ret = scm_call_atomic2(SCM_SVC_BOOT,
SCM_WDOG_DEBUG_BOOT_PART, 1, 0);
else
ret = scm_call2_atomic(SCM_SIP_FNID(SCM_SVC_BOOT,
SCM_WDOG_DEBUG_BOOT_PART), &desc);
if (ret)
pr_err("Failed to disable secure wdog debug: %dn", ret);
halt_spmi_pmic_arbiter();
deassert_ps_hold();
mdelay(10000);
}
msm_restart_prepare(cmd); 参数为("recovery")
kernel/drivers/power/reset/msm-poweroff.c
static void msm_restart_prepare(const char *cmd)
{
#ifdef CONFIG_MSM_SUBSYSTEM_RESTART
extern char panic_subsystem[];
#endif /* CONFIG_MSM_SUBSYSTEM_RESTART */
bool need_warm_reset = false;
#ifdef CONFIG_MSM_DLOAD_MODE
/* Write download mode flags if we're panic'ing
* Write download mode flags if restart_mode says so
* Kill download mode if master-kill switch is set
*/
set_dload_mode(download_mode &&
(in_panic || restart_mode == RESTART_DLOAD));
#endif
if (qpnp_pon_check_hard_reset_stored()) {
/* Set warm reset as true when device is in dload mode
* or device doesn't boot up into recovery, bootloader or rtc.
*/
if (get_dload_mode() ||
((cmd != NULL && cmd[0] != '0') &&
strcmp(cmd, "recovery") &&
strcmp(cmd, "bootloader") &&
strcmp(cmd, "rtc")))
need_warm_reset = true;
} else {
need_warm_reset = (get_dload_mode() ||
(cmd != NULL && cmd[0] != '0'));
}
/* Hard reset the PMIC unless memory contents must be maintained. */
if (need_warm_reset || restart_mode == RESTART_DLOAD) {// MODIFIED by , 2016-03-21, BUG-1761259
qpnp_pon_system_pwr_off(PON_POWER_OFF_WARM_RESET);
} else {
qpnp_pon_system_pwr_off(PON_POWER_OFF_HARD_RESET);
}
if (cmd != NULL) {
if (!strncmp(cmd, "bootloader", 10)) {
qpnp_pon_set_restart_reason(
PON_RESTART_REASON_BOOTLOADER);
__raw_writel(0x77665500, restart_reason);
} else if (!strncmp(cmd, "recovery", 8)) {
qpnp_pon_set_restart_reason(
PON_RESTART_REASON_RECOVERY);
__raw_writel(0x77665502, restart_reason); //********************
else if (!strcmp(cmd, "rtc")) {
qpnp_pon_set_restart_reason(
PON_RESTART_REASON_RTC);
__raw_writel(0x77665503, restart_reason);
} else if (!strncmp(cmd, "oem-", 4)) {
unsigned long code;
int ret;
ret = kstrtoul(cmd + 4, 16, &code);
if (!ret)
__raw_writel(0x6f656d00 | (code & 0xff),
restart_reason);
if (download_mode && (code & 0xff) == 0x3a)
set_dload_mode(1);
} else if (!strncmp(cmd, "edl", 3)) {
enable_emergency_dload_mode();
} else {
__raw_writel(0x77665501, restart_reason);
}
}
#ifdef CONFIG_MSM_SUBSYSTEM_RESTART
if (in_panic) {
printk(KERN_ERR "subsystem %s crashn", panic_subsystem);
if (!memcmp(panic_subsystem, "modem", 5)) {
__raw_writel(0x6f656dc1, restart_reason);
} else if (!memcmp(panic_subsystem, "wcnss", 5)) {
__raw_writel(0x6f656dc2, restart_reason);
} else if (!memcmp(panic_subsystem, "adsp", 4) || !memcmp(panic_subsystem, "ADSP", 4)) {
__raw_writel(0x6f656dc3, restart_reason);
} else if (!memcmp(panic_subsystem, "venus", 5)) {
__raw_writel(0x6f656dc4, restart_reason);
} else {
__raw_writel(0x6f656dc0, restart_reason);
}
if (download_mode)
set_dload_mode(1);
}
#endif /* CONFIG_MSM_SUBSYSTEM_RESTART */
//add begin by ,Powering on mode switch to 9008 mode,task:665748
if (restart_mode == RESTART_DLOAD) {
enable_emergency_dload_mode();
}
//add end by