From: Bob Liu <lliubbo@xxxxxxxxx>
Split the USB MMR init steps out into a helper func that both the platform
init and the resume code may call.
Then while suspending, the gpio_vrsel will change from high to low which
will generate a wakeup event and resume the system immediately, so we need
to manually drive it low before we sleep.
Signed-off-by: Bob Liu <lliubbo@xxxxxxxxx>
Signed-off-by: Mike Frysinger <vapier@xxxxxxxxxx>
Signed-off-by: Felipe Balbi <balbi@xxxxxx>
---
drivers/usb/musb/blackfin.c | 72 ++++++++++++++++++++++++++++-------------
drivers/usb/musb/musb_core.h | 2 +-
2 files changed, 50 insertions(+), 24 deletions(-)
diff --git a/drivers/usb/musb/blackfin.c b/drivers/usb/musb/blackfin.c
index 611a9d2..32cc6d9 100644
--- a/drivers/usb/musb/blackfin.c
+++ b/drivers/usb/musb/blackfin.c
@@ -323,30 +323,8 @@ int musb_platform_set_mode(struct musb *musb, u8 musb_mode)
return -EIO;
}
-int __init musb_platform_init(struct musb *musb, void *board_data)
+static void musb_platform_reg_init(struct musb *musb)
{
-
- /*
- * Rev 1.0 BF549 EZ-KITs require PE7 to be high for both DEVICE
- * and OTG HOST modes, while rev 1.1 and greater require PE7 to
- * be low for DEVICE mode and high for HOST mode. We set it high
- * here because we are in host mode
- */
-
- if (gpio_request(musb->config->gpio_vrsel, "USB_VRSEL")) {
- printk(KERN_ERR "Failed ro request USB_VRSEL GPIO_%d \n",
- musb->config->gpio_vrsel);
- return -ENODEV;
- }
- gpio_direction_output(musb->config->gpio_vrsel, 0);
-
- usb_nop_xceiv_register();
- musb->xceiv = otg_get_transceiver();
- if (!musb->xceiv) {
- gpio_free(musb->config->gpio_vrsel);
- return -ENODEV;
- }
-
if (ANOMALY_05000346) {
bfin_write_USB_APHY_CALIB(ANOMALY_05000346_value);
SSYNC();
@@ -380,6 +358,33 @@ int __init musb_platform_init(struct musb *musb, void *board_data)
EP2_RX_ENA | EP3_RX_ENA | EP4_RX_ENA |
EP5_RX_ENA | EP6_RX_ENA | EP7_RX_ENA);
SSYNC();
+}
+
+int __init musb_platform_init(struct musb *musb, void *board_data)
+{
+
+ /*
+ * Rev 1.0 BF549 EZ-KITs require PE7 to be high for both DEVICE
+ * and OTG HOST modes, while rev 1.1 and greater require PE7 to
+ * be low for DEVICE mode and high for HOST mode. We set it high
+ * here because we are in host mode
+ */
+
+ if (gpio_request(musb->config->gpio_vrsel, "USB_VRSEL")) {
+ printk(KERN_ERR "Failed ro request USB_VRSEL GPIO_%d\n",
+ musb->config->gpio_vrsel);
+ return -ENODEV;
+ }
+ gpio_direction_output(musb->config->gpio_vrsel, 0);
+
+ usb_nop_xceiv_register();
+ musb->xceiv = otg_get_transceiver();
+ if (!musb->xceiv) {
+ gpio_free(musb->config->gpio_vrsel);
+ return -ENODEV;
+ }
+
+ musb_platform_reg_init(musb);
if (is_host_enabled(musb)) {
musb->board_set_vbus = bfin_set_vbus;
@@ -394,6 +399,27 @@ int __init musb_platform_init(struct musb *musb, void *board_data)
return 0;
}
+#ifdef CONFIG_PM
+void musb_platform_save_context(struct musb *musb,
+ struct musb_context_registers *musb_context)
+{
+ if (is_host_active(musb))
+ /*
+ * During hibernate gpio_vrsel will change from high to low
+ * low which will generate wakeup event resume the system
+ * immediately. Set it to 0 before hibernate to avoid this
+ * wakeup event.
+ */
+ gpio_set_value(musb->config->gpio_vrsel, 0);
+}
+
+void musb_platform_restore_context(struct musb *musb,
+ struct musb_context_registers *musb_context)
+{
+ musb_platform_reg_init(musb);
+}
+#endif
+
int musb_platform_exit(struct musb *musb)
{
gpio_free(musb->config->gpio_vrsel);
diff --git a/drivers/usb/musb/musb_core.h b/drivers/usb/musb/musb_core.h
index 69797e5..febaabc 100644
--- a/drivers/usb/musb/musb_core.h
+++ b/drivers/usb/musb/musb_core.h
@@ -487,7 +487,7 @@ struct musb_context_registers {
};
#if defined(CONFIG_ARCH_OMAP2430) || defined(CONFIG_ARCH_OMAP3) || \
- defined(CONFIG_ARCH_OMAP4)
+ defined(CONFIG_ARCH_OMAP4) || defined(CONFIG_BLACKFIN)
extern void musb_platform_save_context(struct musb *musb,
struct musb_context_registers *musb_context);
extern void musb_platform_restore_context(struct musb *musb,
--
1.7.1
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