The DWC2 runtime PM code reuses similar patterns to backup and
restore the registers. So consolidate them in USB mode specific
variants. This also has the advantage it is usable for further
PM improvements.
Signed-off-by: Stefan Wahren <wahrenst@xxxxxxx>
---
drivers/usb/dwc2/core.h | 12 +++++
drivers/usb/dwc2/gadget.c | 101 +++++++++++++++++++-------------------
drivers/usb/dwc2/hcd.c | 99 +++++++++++++++++++------------------
3 files changed, 114 insertions(+), 98 deletions(-)
diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h
index 2bd74f3033ed..81e8632f29ed 100644
--- a/drivers/usb/dwc2/core.h
+++ b/drivers/usb/dwc2/core.h
@@ -1435,6 +1435,8 @@ int dwc2_hsotg_tx_fifo_total_depth(struct dwc2_hsotg *hsotg);
int dwc2_hsotg_tx_fifo_average_depth(struct dwc2_hsotg *hsotg);
void dwc2_gadget_init_lpm(struct dwc2_hsotg *hsotg);
void dwc2_gadget_program_ref_clk(struct dwc2_hsotg *hsotg);
+int dwc2_gadget_backup_critical_registers(struct dwc2_hsotg *hsotg);
+int dwc2_gadget_restore_critical_registers(struct dwc2_hsotg *hsotg);
static inline void dwc2_clear_fifo_map(struct dwc2_hsotg *hsotg)
{ hsotg->fifo_map = 0; }
#else
@@ -1482,6 +1484,10 @@ static inline int dwc2_hsotg_tx_fifo_average_depth(struct dwc2_hsotg *hsotg)
{ return 0; }
static inline void dwc2_gadget_init_lpm(struct dwc2_hsotg *hsotg) {}
static inline void dwc2_gadget_program_ref_clk(struct dwc2_hsotg *hsotg) {}
+static inline int dwc2_gadget_backup_critical_registers(struct dwc2_hsotg *hsotg)
+{ return 0; }
+static inline int dwc2_gadget_restore_critical_registers(struct dwc2_hsotg *hsotg)
+{ return 0; }
static inline void dwc2_clear_fifo_map(struct dwc2_hsotg *hsotg) {}
#endif
@@ -1505,6 +1511,8 @@ int dwc2_host_exit_partial_power_down(struct dwc2_hsotg *hsotg,
void dwc2_host_enter_clock_gating(struct dwc2_hsotg *hsotg);
void dwc2_host_exit_clock_gating(struct dwc2_hsotg *hsotg, int rem_wakeup);
bool dwc2_host_can_poweroff_phy(struct dwc2_hsotg *dwc2);
+int dwc2_host_backup_critical_registers(struct dwc2_hsotg *hsotg);
+int dwc2_host_restore_critical_registers(struct dwc2_hsotg *hsotg);
static inline void dwc2_host_schedule_phy_reset(struct dwc2_hsotg *hsotg)
{ schedule_work(&hsotg->phy_reset_work); }
#else
@@ -1544,6 +1552,10 @@ static inline void dwc2_host_exit_clock_gating(struct dwc2_hsotg *hsotg,
int rem_wakeup) {}
static inline bool dwc2_host_can_poweroff_phy(struct dwc2_hsotg *dwc2)
{ return false; }
+static inline int dwc2_host_backup_critical_registers(struct dwc2_hsotg *hsotg)
+{ return 0; }
+static inline int dwc2_host_restore_critical_registers(struct dwc2_hsotg *hsotg)
+{ return 0; }
static inline void dwc2_host_schedule_phy_reset(struct dwc2_hsotg *hsotg) {}
#endif
diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
index e7bf9cc635be..0bff748bcf74 100644
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -5309,6 +5309,49 @@ void dwc2_gadget_program_ref_clk(struct dwc2_hsotg *hsotg)
dev_dbg(hsotg->dev, "GREFCLK=0x%08x\n", dwc2_readl(hsotg, GREFCLK));
}
+int dwc2_gadget_backup_critical_registers(struct dwc2_hsotg *hsotg)
+{
+ int ret;
+
+ /* Backup all registers */
+ ret = dwc2_backup_global_registers(hsotg);
+ if (ret) {
+ dev_err(hsotg->dev, "%s: failed to backup global registers\n",
+ __func__);
+ return ret;
+ }
+
+ ret = dwc2_backup_device_registers(hsotg);
+ if (ret) {
+ dev_err(hsotg->dev, "%s: failed to backup device registers\n",
+ __func__);
+ return ret;
+ }
+
+ return 0;
+}
+
+int dwc2_gadget_restore_critical_registers(struct dwc2_hsotg *hsotg)
+{
+ int ret;
+
+ ret = dwc2_restore_global_registers(hsotg);
+ if (ret) {
+ dev_err(hsotg->dev, "%s: failed to restore registers\n",
+ __func__);
+ return ret;
+ }
+
+ ret = dwc2_restore_device_registers(hsotg, 0);
+ if (ret) {
+ dev_err(hsotg->dev, "%s: failed to restore device registers\n",
+ __func__);
+ return ret;
+ }
+
+ return 0;
+}
+
/**
* dwc2_gadget_enter_hibernation() - Put controller in Hibernation.
*
@@ -5326,18 +5369,9 @@ int dwc2_gadget_enter_hibernation(struct dwc2_hsotg *hsotg)
/* Change to L2(suspend) state */
hsotg->lx_state = DWC2_L2;
dev_dbg(hsotg->dev, "Start of hibernation completed\n");
- ret = dwc2_backup_global_registers(hsotg);
- if (ret) {
- dev_err(hsotg->dev, "%s: failed to backup global registers\n",
- __func__);
- return ret;
- }
- ret = dwc2_backup_device_registers(hsotg);
- if (ret) {
- dev_err(hsotg->dev, "%s: failed to backup device registers\n",
- __func__);
+ ret = dwc2_gadget_backup_critical_registers(hsotg);
+ if (ret)
return ret;
- }
gpwrdn = GPWRDN_PWRDNRSTN;
udelay(10);
@@ -5483,20 +5517,9 @@ int dwc2_gadget_exit_hibernation(struct dwc2_hsotg *hsotg,
dwc2_writel(hsotg, 0xffffffff, GINTSTS);
/* Restore global registers */
- ret = dwc2_restore_global_registers(hsotg);
- if (ret) {
- dev_err(hsotg->dev, "%s: failed to restore registers\n",
- __func__);
- return ret;
- }
-
- /* Restore device registers */
- ret = dwc2_restore_device_registers(hsotg, rem_wakeup);
- if (ret) {
- dev_err(hsotg->dev, "%s: failed to restore device registers\n",
- __func__);
+ ret = dwc2_gadget_restore_critical_registers(hsotg);
+ if (ret)
return ret;
- }
if (rem_wakeup) {
mdelay(10);
@@ -5530,19 +5553,9 @@ int dwc2_gadget_enter_partial_power_down(struct dwc2_hsotg *hsotg)
dev_dbg(hsotg->dev, "Entering device partial power down started.\n");
/* Backup all registers */
- ret = dwc2_backup_global_registers(hsotg);
- if (ret) {
- dev_err(hsotg->dev, "%s: failed to backup global registers\n",
- __func__);
- return ret;
- }
-
- ret = dwc2_backup_device_registers(hsotg);
- if (ret) {
- dev_err(hsotg->dev, "%s: failed to backup device registers\n",
- __func__);
+ ret = dwc2_gadget_backup_critical_registers(hsotg);
+ if (ret)
return ret;
- }
/*
* Clear any pending interrupts since dwc2 will not be able to
@@ -5610,21 +5623,9 @@ int dwc2_gadget_exit_partial_power_down(struct dwc2_hsotg *hsotg,
udelay(100);
if (restore) {
- ret = dwc2_restore_global_registers(hsotg);
- if (ret) {
- dev_err(hsotg->dev, "%s: failed to restore registers\n",
- __func__);
- return ret;
- }
- /* Restore DCFG */
- dwc2_writel(hsotg, dr->dcfg, DCFG);
-
- ret = dwc2_restore_device_registers(hsotg, 0);
- if (ret) {
- dev_err(hsotg->dev, "%s: failed to restore device registers\n",
- __func__);
+ ret = dwc2_gadget_restore_critical_registers(hsotg);
+ if (ret)
return ret;
- }
}
/* Set the Power-On Programming done bit */
diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c
index cb54390e7de4..32fa606e5d59 100644
--- a/drivers/usb/dwc2/hcd.c
+++ b/drivers/usb/dwc2/hcd.c
@@ -5477,6 +5477,49 @@ int dwc2_restore_host_registers(struct dwc2_hsotg *hsotg)
return 0;
}
+int dwc2_host_backup_critical_registers(struct dwc2_hsotg *hsotg)
+{
+ int ret;
+
+ /* Backup all registers */
+ ret = dwc2_backup_global_registers(hsotg);
+ if (ret) {
+ dev_err(hsotg->dev, "%s: failed to backup global registers\n",
+ __func__);
+ return ret;
+ }
+
+ ret = dwc2_backup_host_registers(hsotg);
+ if (ret) {
+ dev_err(hsotg->dev, "%s: failed to backup host registers\n",
+ __func__);
+ return ret;
+ }
+
+ return 0;
+}
+
+int dwc2_host_restore_critical_registers(struct dwc2_hsotg *hsotg)
+{
+ int ret;
+
+ ret = dwc2_restore_global_registers(hsotg);
+ if (ret) {
+ dev_err(hsotg->dev, "%s: failed to restore registers\n",
+ __func__);
+ return ret;
+ }
+
+ ret = dwc2_restore_host_registers(hsotg);
+ if (ret) {
+ dev_err(hsotg->dev, "%s: failed to restore host registers\n",
+ __func__);
+ return ret;
+ }
+
+ return 0;
+}
+
/**
* dwc2_host_enter_hibernation() - Put controller in Hibernation.
*
@@ -5492,18 +5535,9 @@ int dwc2_host_enter_hibernation(struct dwc2_hsotg *hsotg)
u32 gpwrdn;
dev_dbg(hsotg->dev, "Preparing host for hibernation\n");
- ret = dwc2_backup_global_registers(hsotg);
- if (ret) {
- dev_err(hsotg->dev, "%s: failed to backup global registers\n",
- __func__);
- return ret;
- }
- ret = dwc2_backup_host_registers(hsotg);
- if (ret) {
- dev_err(hsotg->dev, "%s: failed to backup host registers\n",
- __func__);
+ ret = dwc2_host_backup_critical_registers(hsotg);
+ if (ret)
return ret;
- }
/* Enter USB Suspend Mode */
hprt0 = dwc2_readl(hsotg, HPRT0);
@@ -5697,20 +5731,9 @@ int dwc2_host_exit_hibernation(struct dwc2_hsotg *hsotg, int rem_wakeup,
dwc2_writel(hsotg, 0xffffffff, GINTSTS);
/* Restore global registers */
- ret = dwc2_restore_global_registers(hsotg);
- if (ret) {
- dev_err(hsotg->dev, "%s: failed to restore registers\n",
- __func__);
+ ret = dwc2_host_restore_critical_registers(hsotg);
+ if (ret)
return ret;
- }
-
- /* Restore host registers */
- ret = dwc2_restore_host_registers(hsotg);
- if (ret) {
- dev_err(hsotg->dev, "%s: failed to restore host registers\n",
- __func__);
- return ret;
- }
if (rem_wakeup) {
dwc2_hcd_rem_wakeup(hsotg);
@@ -5777,19 +5800,9 @@ int dwc2_host_enter_partial_power_down(struct dwc2_hsotg *hsotg)
dev_warn(hsotg->dev, "Suspend wasn't generated\n");
/* Backup all registers */
- ret = dwc2_backup_global_registers(hsotg);
- if (ret) {
- dev_err(hsotg->dev, "%s: failed to backup global registers\n",
- __func__);
- return ret;
- }
-
- ret = dwc2_backup_host_registers(hsotg);
- if (ret) {
- dev_err(hsotg->dev, "%s: failed to backup host registers\n",
- __func__);
+ ret = dwc2_host_backup_critical_registers(hsotg);
+ if (ret)
return ret;
- }
/*
* Clear any pending interrupts since dwc2 will not be able to
@@ -5858,19 +5871,9 @@ int dwc2_host_exit_partial_power_down(struct dwc2_hsotg *hsotg,
udelay(100);
if (restore) {
- ret = dwc2_restore_global_registers(hsotg);
- if (ret) {
- dev_err(hsotg->dev, "%s: failed to restore registers\n",
- __func__);
- return ret;
- }
-
- ret = dwc2_restore_host_registers(hsotg);
- if (ret) {
- dev_err(hsotg->dev, "%s: failed to restore host registers\n",
- __func__);
+ ret = dwc2_host_restore_critical_registers(hsotg);
+ if (ret)
return ret;
- }
}
/* Drive resume signaling and exit suspend mode on the port. */
--
2.34.1
