static int vfp_pm_suspend(struct sys_device *dev, pm_message_t state)
{
int saved = vfp_flush_context();
if (saved)
printk(KERN_DEBUG "%s: saved vfp state\n", __func__);
/* clear any information we had about last context state */
memset(last_VFP_context, 0, sizeof(last_VFP_context));
return 0;
}
/*
* Power collapse the Apps processor without involving Modem.
*
* Return value:
* 0: success
*/
static int __ref msm_pm_power_collapse_standalone(bool from_idle)
{
int collapsed = 0;
int ret;
void *entry;
MSM_PM_DPRINTK(MSM_PM_DEBUG_SUSPEND|MSM_PM_DEBUG_POWER_COLLAPSE,
KERN_INFO, "%s()\n", __func__);
ret = msm_spm_set_low_power_mode(MSM_SPM_MODE_POWER_COLLAPSE, false);
WARN_ON(ret);
entry = (!smp_processor_id() || from_idle) ?
msm_pm_collapse_exit : msm_secondary_startup;
msm_pm_boot_config_before_pc(smp_processor_id(),
virt_to_phys(entry));
#ifdef CONFIG_VFP
vfp_flush_context();
#endif
#ifdef CONFIG_CACHE_L2X0
if (!cpu_is_msm8625())
l2cc_suspend();
#endif
collapsed = msm_pm_collapse();
#ifdef CONFIG_CACHE_L2X0
if (!cpu_is_msm8625())
l2cc_resume();
#endif
msm_pm_boot_config_after_pc(smp_processor_id());
if (collapsed) {
#ifdef CONFIG_VFP
vfp_reinit();
#endif
cpu_init();
local_fiq_enable();
}
MSM_PM_DPRINTK(MSM_PM_DEBUG_SUSPEND | MSM_PM_DEBUG_POWER_COLLAPSE,
KERN_INFO,
"%s(): msm_pm_collapse returned %d\n", __func__, collapsed);
ret = msm_spm_set_low_power_mode(MSM_SPM_MODE_CLOCK_GATING, false);
WARN_ON(ret);
return !collapsed;
}
static int vfp_pm_suspend(void)
{
vfp_flush_context();
return 0;
}
/*
* Power collapse the Apps processor. This function executes the handshake
* protocol with Modem.
*
* Return value:
* -EAGAIN: modem reset occurred or early exit from power collapse
* -EBUSY: modem not ready for our power collapse -- no power loss
* -ETIMEDOUT: timed out waiting for modem's handshake -- no power loss
* 0: success
*/
static int msm_pm_power_collapse
(bool from_idle, uint32_t sleep_delay, uint32_t sleep_limit)
{
struct msm_pm_polled_group state_grps[2];
unsigned long saved_acpuclk_rate;
int collapsed = 0;
#ifdef CONFIG_MSM_SM_EVENT
uint64_t sclk_suspend_time = 0, sclk_resume_time, sclk_period;
#endif
int ret;
int val;
int modem_early_exit = 0;
MSM_PM_DPRINTK(MSM_PM_DEBUG_SUSPEND|MSM_PM_DEBUG_POWER_COLLAPSE,
KERN_INFO, "%s(): idle %d, delay %u, limit %u\n", __func__,
(int)from_idle, sleep_delay, sleep_limit);
if (!(smsm_get_state(SMSM_POWER_MASTER_DEM) & DEM_MASTER_SMSM_READY)) {
MSM_PM_DPRINTK(
MSM_PM_DEBUG_SUSPEND | MSM_PM_DEBUG_POWER_COLLAPSE,
KERN_INFO, "%s(): master not ready\n", __func__);
ret = -EBUSY;
goto power_collapse_bail;
}
memset(msm_pm_smem_data, 0, sizeof(*msm_pm_smem_data));
if (cpu_is_msm8625()) {
/* Program the SPM */
ret = msm_spm_set_low_power_mode(MSM_SPM_MODE_POWER_COLLAPSE,
false);
WARN_ON(ret);
}
if (msm_cpr_ops)
msm_cpr_ops->cpr_suspend();
msm_pm_irq_extns->enter_sleep1(true, from_idle,
&msm_pm_smem_data->irq_mask);
msm_sirc_enter_sleep();
msm_gpio_enter_sleep(from_idle);
msm_pm_smem_data->sleep_time = sleep_delay;
msm_pm_smem_data->resources_used = sleep_limit;
/* Enter PWRC/PWRC_SUSPEND */
if (from_idle)
smsm_change_state(SMSM_APPS_DEM, DEM_SLAVE_SMSM_RUN,
DEM_SLAVE_SMSM_PWRC);
else
smsm_change_state(SMSM_APPS_DEM, DEM_SLAVE_SMSM_RUN,
DEM_SLAVE_SMSM_PWRC | DEM_SLAVE_SMSM_PWRC_SUSPEND);
MSM_PM_DEBUG_PRINT_STATE("msm_pm_power_collapse(): PWRC");
MSM_PM_DEBUG_PRINT_SLEEP_INFO();
memset(state_grps, 0, sizeof(state_grps));
state_grps[0].group_id = SMSM_POWER_MASTER_DEM;
state_grps[0].bits_all_set = DEM_MASTER_SMSM_RSA;
state_grps[1].group_id = SMSM_MODEM_STATE;
state_grps[1].bits_all_set = SMSM_RESET;
ret = msm_pm_poll_state(ARRAY_SIZE(state_grps), state_grps);
if (ret < 0) {
printk(KERN_EMERG "%s(): power collapse entry "
"timed out waiting for Modem's response\n", __func__);
msm_pm_timeout();
}
if (ret == 1) {
MSM_PM_DPRINTK(
MSM_PM_DEBUG_SUSPEND|MSM_PM_DEBUG_POWER_COLLAPSE,
KERN_INFO,
"%s(): msm_pm_poll_state detected Modem reset\n",
__func__);
goto power_collapse_early_exit;
}
/* DEM Master in RSA */
MSM_PM_DEBUG_PRINT_STATE("msm_pm_power_collapse(): PWRC RSA");
ret = msm_pm_irq_extns->enter_sleep2(true, from_idle);
if (ret < 0) {
MSM_PM_DPRINTK(
MSM_PM_DEBUG_SUSPEND|MSM_PM_DEBUG_POWER_COLLAPSE,
KERN_INFO,
"%s(): msm_irq_enter_sleep2 aborted, %d\n", __func__,
ret);
goto power_collapse_early_exit;
}
#ifdef CONFIG_MSM_SM_EVENT
if (!from_idle)
sclk_suspend_time = msm_timer_get_sclk_time(&sclk_period);
#endif
msm_pm_config_hw_before_power_down();
MSM_PM_DEBUG_PRINT_STATE("msm_pm_power_collapse(): pre power down");
saved_acpuclk_rate = acpuclk_power_collapse();
MSM_PM_DPRINTK(MSM_PM_DEBUG_CLOCK, KERN_INFO,
"%s(): change clock rate (old rate = %lu)\n", __func__,
saved_acpuclk_rate);
if (saved_acpuclk_rate == 0) {
msm_pm_config_hw_after_power_up();
goto power_collapse_early_exit;
}
#ifdef CONFIG_MSM_SM_EVENT
if (!from_idle) {
sm_add_event(SM_POWER_EVENT | SM_POWER_EVENT_SUSPEND, SM_EVENT_END, 0, 0, 0);
}
#endif
msm_pm_boot_config_before_pc(smp_processor_id(),
virt_to_phys(msm_pm_collapse_exit));
#ifdef CONFIG_VFP
if (from_idle)
vfp_flush_context();
#endif
#ifdef CONFIG_CACHE_L2X0
if (!cpu_is_msm8625())
l2cc_suspend();
else
apps_power_collapse = 1;
#endif
collapsed = msm_pm_collapse();
/*
* TBD: Currently recognise the MODEM early exit
* path by reading the MPA5_GDFS_CNT_VAL register.
*/
if (cpu_is_msm8625()) {
/*
* on system reset, default value of MPA5_GDFS_CNT_VAL
* is = 0x0, later modem reprogram this value to
* 0x00030004. Once APPS did a power collapse and
* coming out of it expected value of this register
* always be 0x00030004. Incase if APPS sees the value
* as 0x00030002 consider this case as a modem early
* exit.
*/
val = __raw_readl(MSM_CFG_CTL_BASE + 0x38);
if (val != 0x00030002)
power_collapsed = 1;
else
modem_early_exit = 1;
}
#ifdef CONFIG_CACHE_L2X0
if (!cpu_is_msm8625())
l2cc_resume();
else
apps_power_collapse = 0;
#endif
msm_pm_boot_config_after_pc(smp_processor_id());
if (collapsed) {
#ifdef CONFIG_VFP
if (from_idle)
vfp_reinit();
#endif
cpu_init();
local_fiq_enable();
}
MSM_PM_DPRINTK(MSM_PM_DEBUG_SUSPEND | MSM_PM_DEBUG_POWER_COLLAPSE,
KERN_INFO,
"%s(): msm_pm_collapse returned %d\n", __func__, collapsed);
MSM_PM_DPRINTK(MSM_PM_DEBUG_CLOCK, KERN_INFO,
"%s(): restore clock rate to %lu\n", __func__,
saved_acpuclk_rate);
if (acpuclk_set_rate(smp_processor_id(), saved_acpuclk_rate,
SETRATE_PC) < 0)
printk(KERN_ERR "%s(): failed to restore clock rate(%lu)\n",
__func__, saved_acpuclk_rate);
msm_pm_irq_extns->exit_sleep1(msm_pm_smem_data->irq_mask,
msm_pm_smem_data->wakeup_reason,
msm_pm_smem_data->pending_irqs);
msm_pm_config_hw_after_power_up();
MSM_PM_DEBUG_PRINT_STATE("msm_pm_power_collapse(): post power up");
memset(state_grps, 0, sizeof(state_grps));
state_grps[0].group_id = SMSM_POWER_MASTER_DEM;
state_grps[0].bits_any_set =
DEM_MASTER_SMSM_RSA | DEM_MASTER_SMSM_PWRC_EARLY_EXIT;
state_grps[1].group_id = SMSM_MODEM_STATE;
state_grps[1].bits_all_set = SMSM_RESET;
ret = msm_pm_poll_state(ARRAY_SIZE(state_grps), state_grps);
if (ret < 0) {
printk(KERN_EMERG "%s(): power collapse exit "
"timed out waiting for Modem's response\n", __func__);
msm_pm_timeout();
}
if (ret == 1) {
MSM_PM_DPRINTK(
MSM_PM_DEBUG_SUSPEND|MSM_PM_DEBUG_POWER_COLLAPSE,
KERN_INFO,
"%s(): msm_pm_poll_state detected Modem reset\n",
__func__);
goto power_collapse_early_exit;
}
/* Sanity check */
if (collapsed && !modem_early_exit) {
BUG_ON(!(state_grps[0].value_read & DEM_MASTER_SMSM_RSA));
} else {
BUG_ON(!(state_grps[0].value_read &
DEM_MASTER_SMSM_PWRC_EARLY_EXIT));
goto power_collapse_early_exit;
}
/* Enter WFPI */
smsm_change_state(SMSM_APPS_DEM,
DEM_SLAVE_SMSM_PWRC | DEM_SLAVE_SMSM_PWRC_SUSPEND,
DEM_SLAVE_SMSM_WFPI);
MSM_PM_DEBUG_PRINT_STATE("msm_pm_power_collapse(): WFPI");
memset(state_grps, 0, sizeof(state_grps));
state_grps[0].group_id = SMSM_POWER_MASTER_DEM;
state_grps[0].bits_all_set = DEM_MASTER_SMSM_RUN;
state_grps[1].group_id = SMSM_MODEM_STATE;
state_grps[1].bits_all_set = SMSM_RESET;
ret = msm_pm_poll_state(ARRAY_SIZE(state_grps), state_grps);
if (ret < 0) {
printk(KERN_EMERG "%s(): power collapse WFPI "
"timed out waiting for Modem's response\n", __func__);
msm_pm_timeout();
}
if (ret == 1) {
MSM_PM_DPRINTK(
MSM_PM_DEBUG_SUSPEND|MSM_PM_DEBUG_POWER_COLLAPSE,
KERN_INFO,
"%s(): msm_pm_poll_state detected Modem reset\n",
__func__);
ret = -EAGAIN;
goto power_collapse_restore_gpio_bail;
}
#ifdef CONFIG_MSM_SM_EVENT
if (!from_idle) {
int64_t time;
sm_set_system_state (SM_STATE_RESUME);
sclk_resume_time = msm_timer_get_sclk_time(NULL);
time = sclk_resume_time - sclk_suspend_time;
if (time < 0)
time += sclk_period;
do_div (time, 1000000);//milli-second
sm_add_event(SM_POWER_EVENT | SM_POWER_EVENT_RESUME, SM_EVENT_START, (uint32_t)time, (void *)msm_pm_smem_data, sizeof(*msm_pm_smem_data));
}
#endif
/* DEM Master == RUN */
MSM_PM_DEBUG_PRINT_STATE("msm_pm_power_collapse(): WFPI RUN");
MSM_PM_DEBUG_PRINT_SLEEP_INFO();
msm_pm_irq_extns->exit_sleep2(msm_pm_smem_data->irq_mask,
msm_pm_smem_data->wakeup_reason,
msm_pm_smem_data->pending_irqs);
msm_pm_irq_extns->exit_sleep3(msm_pm_smem_data->irq_mask,
msm_pm_smem_data->wakeup_reason,
msm_pm_smem_data->pending_irqs);
msm_gpio_exit_sleep();
msm_sirc_exit_sleep();
smsm_change_state(SMSM_APPS_DEM,
DEM_SLAVE_SMSM_WFPI, DEM_SLAVE_SMSM_RUN);
MSM_PM_DEBUG_PRINT_STATE("msm_pm_power_collapse(): RUN");
smd_sleep_exit();
if (cpu_is_msm8625()) {
ret = msm_spm_set_low_power_mode(MSM_SPM_MODE_CLOCK_GATING,
false);
WARN_ON(ret);
}
if (msm_cpr_ops)
msm_cpr_ops->cpr_resume();
return 0;
power_collapse_early_exit:
/* Enter PWRC_EARLY_EXIT */
smsm_change_state(SMSM_APPS_DEM,
DEM_SLAVE_SMSM_PWRC | DEM_SLAVE_SMSM_PWRC_SUSPEND,
DEM_SLAVE_SMSM_PWRC_EARLY_EXIT);
MSM_PM_DEBUG_PRINT_STATE("msm_pm_power_collapse(): EARLY_EXIT");
memset(state_grps, 0, sizeof(state_grps));
state_grps[0].group_id = SMSM_POWER_MASTER_DEM;
state_grps[0].bits_all_set = DEM_MASTER_SMSM_PWRC_EARLY_EXIT;
state_grps[1].group_id = SMSM_MODEM_STATE;
state_grps[1].bits_all_set = SMSM_RESET;
ret = msm_pm_poll_state(ARRAY_SIZE(state_grps), state_grps);
MSM_PM_DEBUG_PRINT_STATE("msm_pm_power_collapse(): EARLY_EXIT EE");
if (ret < 0) {
printk(KERN_EMERG "%s(): power collapse EARLY_EXIT "
"timed out waiting for Modem's response\n", __func__);
msm_pm_timeout();
}
if (ret == 1) {
MSM_PM_DPRINTK(
MSM_PM_DEBUG_SUSPEND|MSM_PM_DEBUG_POWER_COLLAPSE,
KERN_INFO,
"%s(): msm_pm_poll_state detected Modem reset\n",
__func__);
}
/* DEM Master == RESET or PWRC_EARLY_EXIT */
ret = -EAGAIN;
power_collapse_restore_gpio_bail:
msm_gpio_exit_sleep();
msm_sirc_exit_sleep();
/* Enter RUN */
smsm_change_state(SMSM_APPS_DEM,
DEM_SLAVE_SMSM_PWRC | DEM_SLAVE_SMSM_PWRC_SUSPEND |
DEM_SLAVE_SMSM_PWRC_EARLY_EXIT, DEM_SLAVE_SMSM_RUN);
MSM_PM_DEBUG_PRINT_STATE("msm_pm_power_collapse(): RUN");
if (collapsed)
smd_sleep_exit();
if (msm_cpr_ops)
msm_cpr_ops->cpr_resume();
power_collapse_bail:
if (cpu_is_msm8625()) {
ret = msm_spm_set_low_power_mode(MSM_SPM_MODE_CLOCK_GATING,
false);
WARN_ON(ret);
}
return ret;
}
static int vfp_pm_suspend(struct sys_device *dev, pm_message_t state)
{
vfp_flush_context();
return 0;
}
