static irqreturn_t wcd9xxx_irq_thread(int irq, void *data)
{
int ret;
int i;
struct wcd9xxx *wcd9xxx = data;
int num_irq_regs = wcd9xxx_num_irq_regs(wcd9xxx);
u8 status[num_irq_regs];
if (unlikely(wcd9xxx_lock_sleep(wcd9xxx) == false)) {
dev_err(wcd9xxx->dev, "Failed to hold suspend\n");
return IRQ_NONE;
}
ret = wcd9xxx_bulk_read(wcd9xxx, WCD9XXX_A_INTR_STATUS0,
num_irq_regs, status);
if (ret < 0) {
dev_err(wcd9xxx->dev, "Failed to read interrupt status: %d\n",
ret);
dev_err(wcd9xxx->dev, "Disable irq %d\n", wcd9xxx->irq);
disable_irq_wake(wcd9xxx->irq);
disable_irq_nosync(wcd9xxx->irq);
wcd9xxx_unlock_sleep(wcd9xxx);
return IRQ_NONE;
}
/* Apply masking */
for (i = 0; i < num_irq_regs; i++)
status[i] &= ~wcd9xxx->irq_masks_cur[i];
/* Find out which interrupt was triggered and call that interrupt's
* handler function
*/
if (status[BIT_BYTE(WCD9XXX_IRQ_SLIMBUS)] &
BYTE_BIT_MASK(WCD9XXX_IRQ_SLIMBUS))
wcd9xxx_irq_dispatch(wcd9xxx, WCD9XXX_IRQ_SLIMBUS);
/* Since codec has only one hardware irq line which is shared by
* codec's different internal interrupts, so it's possible master irq
* handler dispatches multiple nested irq handlers after breaking
* order. Dispatch MBHC interrupts order to follow MBHC state
* machine's order */
for (i = WCD9XXX_IRQ_MBHC_INSERTION;
i >= WCD9XXX_IRQ_MBHC_REMOVAL; i--) {
if (status[BIT_BYTE(i)] & BYTE_BIT_MASK(i))
wcd9xxx_irq_dispatch(wcd9xxx, i);
}
for (i = WCD9XXX_IRQ_BG_PRECHARGE; i < wcd9xxx->num_irqs; i++) {
if (status[BIT_BYTE(i)] & BYTE_BIT_MASK(i))
wcd9xxx_irq_dispatch(wcd9xxx, i);
}
wcd9xxx_unlock_sleep(wcd9xxx);
return IRQ_HANDLED;
}
bool wcd9xxx_lock_sleep(
struct wcd9xxx_core_resource *wcd9xxx_res)
{
enum wcd9xxx_pm_state os;
mutex_lock(&wcd9xxx_res->pm_lock);
if (wcd9xxx_res->wlock_holders++ == 0) {
pr_debug("%s: holding wake lock\n", __func__);
pm_qos_update_request(&wcd9xxx_res->pm_qos_req,
msm_cpuidle_get_deep_idle_latency());
}
mutex_unlock(&wcd9xxx_res->pm_lock);
if (!wait_event_timeout(wcd9xxx_res->pm_wq,
((os = wcd9xxx_pm_cmpxchg(wcd9xxx_res,
WCD9XXX_PM_SLEEPABLE,
WCD9XXX_PM_AWAKE)) ==
WCD9XXX_PM_SLEEPABLE ||
(os == WCD9XXX_PM_AWAKE)),
msecs_to_jiffies(
WCD9XXX_SYSTEM_RESUME_TIMEOUT_MS))) {
pr_warn("%s: system didn't resume within %dms, s %d, w %d\n",
__func__,
WCD9XXX_SYSTEM_RESUME_TIMEOUT_MS, wcd9xxx_res->pm_state,
wcd9xxx_res->wlock_holders);
wcd9xxx_unlock_sleep(wcd9xxx_res);
return false;
}
wake_up_all(&wcd9xxx_res->pm_wq);
return true;
}
bool wcd9xxx_lock_sleep(
struct wcd9xxx_core_resource *wcd9xxx_res)
{
enum wcd9xxx_pm_state os;
/*
* wcd9xxx_{lock/unlock}_sleep will be called by wcd9xxx_irq_thread
* and its subroutines only motly.
* but btn0_lpress_fn is not wcd9xxx_irq_thread's subroutine and
* It can race with wcd9xxx_irq_thread.
* So need to embrace wlock_holders with mutex.
*
* If system didn't resume, we can simply return false so codec driver's
* IRQ handler can return without handling IRQ.
* As interrupt line is still active, codec will have another IRQ to
* retry shortly.
*/
mutex_lock(&wcd9xxx_res->pm_lock);
if (wcd9xxx_res->wlock_holders++ == 0) {
pr_debug("%s: holding wake lock\n", __func__);
pm_qos_update_request(&wcd9xxx_res->pm_qos_req,
msm_cpuidle_get_deep_idle_latency());
}
mutex_unlock(&wcd9xxx_res->pm_lock);
if (!wait_event_timeout(wcd9xxx_res->pm_wq,
((os = wcd9xxx_pm_cmpxchg(wcd9xxx_res,
WCD9XXX_PM_SLEEPABLE,
WCD9XXX_PM_AWAKE)) ==
WCD9XXX_PM_SLEEPABLE ||
(os == WCD9XXX_PM_AWAKE)),
msecs_to_jiffies(
WCD9XXX_SYSTEM_RESUME_TIMEOUT_MS))) {
pr_warn("%s: system didn't resume within %dms, s %d, w %d\n",
__func__,
WCD9XXX_SYSTEM_RESUME_TIMEOUT_MS, wcd9xxx_res->pm_state,
wcd9xxx_res->wlock_holders);
wcd9xxx_unlock_sleep(wcd9xxx_res);
return false;
}
wake_up_all(&wcd9xxx_res->pm_wq);
return true;
}
static irqreturn_t wcd9xxx_irq_thread(int irq, void *data)
{
int ret;
int i;
struct intr_data irqdata;
char linebuf[128];
static DEFINE_RATELIMIT_STATE(ratelimit, 5 * HZ, 1);
struct wcd9xxx_core_resource *wcd9xxx_res = data;
int num_irq_regs = wcd9xxx_res->num_irq_regs;
u8 status[num_irq_regs], status1[num_irq_regs];
if (unlikely(wcd9xxx_lock_sleep(wcd9xxx_res) == false)) {
dev_err(wcd9xxx_res->dev, "Failed to hold suspend\n");
return IRQ_NONE;
}
if (!wcd9xxx_res->codec_bulk_read) {
dev_err(wcd9xxx_res->dev,
"%s: Codec Bulk Register read callback not supplied\n",
__func__);
goto err_disable_irq;
}
ret = wcd9xxx_res->codec_bulk_read(wcd9xxx_res,
WCD9XXX_A_INTR_STATUS0,
num_irq_regs, status);
if (ret < 0) {
dev_err(wcd9xxx_res->dev,
"Failed to read interrupt status: %d\n", ret);
goto err_disable_irq;
}
for (i = 0; i < num_irq_regs; i++)
status[i] &= ~wcd9xxx_res->irq_masks_cur[i];
memcpy(status1, status, sizeof(status1));
for (i = 0; i < wcd9xxx_res->intr_table_size; i++) {
irqdata = wcd9xxx_res->intr_table[i];
if (status[BIT_BYTE(irqdata.intr_num)] &
BYTE_BIT_MASK(irqdata.intr_num)) {
wcd9xxx_irq_dispatch(wcd9xxx_res, &irqdata);
status1[BIT_BYTE(irqdata.intr_num)] &=
~BYTE_BIT_MASK(irqdata.intr_num);
}
}
if (unlikely(!memcmp(status, status1, sizeof(status)))) {
if (__ratelimit(&ratelimit)) {
pr_warn("%s: Unhandled irq found\n", __func__);
hex_dump_to_buffer(status, sizeof(status), 16, 1,
linebuf, sizeof(linebuf), false);
pr_warn("%s: status0 : %s\n", __func__, linebuf);
hex_dump_to_buffer(status1, sizeof(status1), 16, 1,
linebuf, sizeof(linebuf), false);
pr_warn("%s: status1 : %s\n", __func__, linebuf);
}
memset(status, 0xff, num_irq_regs);
wcd9xxx_res->codec_bulk_write(wcd9xxx_res,
WCD9XXX_A_INTR_CLEAR0,
num_irq_regs, status);
if (wcd9xxx_get_intf_type() == WCD9XXX_INTERFACE_TYPE_I2C)
wcd9xxx_res->codec_reg_write(wcd9xxx_res,
WCD9XXX_A_INTR_MODE, 0x02);
}
wcd9xxx_unlock_sleep(wcd9xxx_res);
return IRQ_HANDLED;
err_disable_irq:
dev_err(wcd9xxx_res->dev,
"Disable irq %d\n", wcd9xxx_res->irq);
disable_irq_wake(wcd9xxx_res->irq);
disable_irq_nosync(wcd9xxx_res->irq);
wcd9xxx_unlock_sleep(wcd9xxx_res);
return IRQ_NONE;
}
static irqreturn_t wcd9xxx_irq_thread(int irq, void *data)
{
int ret;
int i;
struct intr_data irqdata;
char linebuf[128];
static DEFINE_RATELIMIT_STATE(ratelimit, 5 * HZ, 1);
struct wcd9xxx_core_resource *wcd9xxx_res = data;
int num_irq_regs = wcd9xxx_res->num_irq_regs;
u8 status[num_irq_regs], status1[num_irq_regs];
if (unlikely(wcd9xxx_lock_sleep(wcd9xxx_res) == false)) {
dev_err(wcd9xxx_res->dev, "Failed to hold suspend\n");
return IRQ_NONE;
}
if (!wcd9xxx_res->codec_bulk_read) {
dev_err(wcd9xxx_res->dev,
"%s: Codec Bulk Register read callback not supplied\n",
__func__);
goto err_disable_irq;
}
ret = wcd9xxx_res->codec_bulk_read(wcd9xxx_res,
WCD9XXX_A_INTR_STATUS0,
num_irq_regs, status);
if (ret < 0) {
dev_err(wcd9xxx_res->dev,
"Failed to read interrupt status: %d\n", ret);
goto err_disable_irq;
}
/* Apply masking */
for (i = 0; i < num_irq_regs; i++)
status[i] &= ~wcd9xxx_res->irq_masks_cur[i];
memcpy(status1, status, sizeof(status1));
/* Find out which interrupt was triggered and call that interrupt's
* handler function
*
* Since codec has only one hardware irq line which is shared by
* codec's different internal interrupts, so it's possible master irq
* handler dispatches multiple nested irq handlers after breaking
* order. Dispatch interrupts in the order that is maintained by
* the interrupt table.
*/
for (i = 0; i < wcd9xxx_res->intr_table_size; i++) {
irqdata = wcd9xxx_res->intr_table[i];
if (status[BIT_BYTE(irqdata.intr_num)] &
BYTE_BIT_MASK(irqdata.intr_num)) {
wcd9xxx_irq_dispatch(wcd9xxx_res, &irqdata);
status1[BIT_BYTE(irqdata.intr_num)] &=
~BYTE_BIT_MASK(irqdata.intr_num);
}
}
/*
* As a failsafe if unhandled irq is found, clear it to prevent
* interrupt storm.
* Note that we can say there was an unhandled irq only when no irq
* handled by nested irq handler since Taiko supports qdsp as irqs'
* destination for few irqs. Therefore driver shouldn't clear pending
* irqs when few handled while few others not.
*/
if (unlikely(!memcmp(status, status1, sizeof(status)))) {
if (__ratelimit(&ratelimit)) {
pr_warn("%s: Unhandled irq found\n", __func__);
hex_dump_to_buffer(status, sizeof(status), 16, 1,
linebuf, sizeof(linebuf), false);
pr_warn("%s: status0 : %s\n", __func__, linebuf);
hex_dump_to_buffer(status1, sizeof(status1), 16, 1,
linebuf, sizeof(linebuf), false);
pr_warn("%s: status1 : %s\n", __func__, linebuf);
}
memset(status, 0xff, num_irq_regs);
ret = wcd9xxx_res->codec_bulk_write(wcd9xxx_res,
WCD9XXX_A_INTR_CLEAR0,
num_irq_regs, status);
if (wcd9xxx_get_intf_type() == WCD9XXX_INTERFACE_TYPE_I2C)
wcd9xxx_res->codec_reg_write(wcd9xxx_res,
WCD9XXX_A_INTR_MODE, 0x02);
}
wcd9xxx_unlock_sleep(wcd9xxx_res);
return IRQ_HANDLED;
err_disable_irq:
dev_err(wcd9xxx_res->dev,
"Disable irq %d\n", wcd9xxx_res->irq);
disable_irq_wake(wcd9xxx_res->irq);
disable_irq_nosync(wcd9xxx_res->irq);
wcd9xxx_unlock_sleep(wcd9xxx_res);
return IRQ_NONE;
}