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authorDavid Brownell <david-b@pacbell.net>2007-01-16 21:46:39 +0100
committerGreg Kroah-Hartman <gregkh@suse.de>2007-02-08 00:44:37 +0100
commit66e56ce75e39210415fb12ceacd5f3580ad72d50 (patch)
treeaefd162287e90def0a034c4a6c7aaa24617c779f /drivers/usb
parentEHCI: force high-speed devices to run at full speed (diff)
downloadlinux-66e56ce75e39210415fb12ceacd5f3580ad72d50.tar.xz
linux-66e56ce75e39210415fb12ceacd5f3580ad72d50.zip
USB: at91_udc wakeup event updates
This updates the AT91 UDC driver's handling of wakeup events: - Fix a bug in the original scheme, which was never updated after the {enable,disable}_irq_wake() semantics were updated to address refcounting issues (i.e. behave for shared irqs). - Couple handling of both type of wakeup events, to be more direct. The controller can be source of wakeup events for cases like bus reset and USB resume. On some boards, VBUS sensing is also IRQ driven. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb')
-rw-r--r--drivers/usb/gadget/at91_udc.c19
-rw-r--r--drivers/usb/gadget/at91_udc.h1
2 files changed, 12 insertions, 8 deletions
diff --git a/drivers/usb/gadget/at91_udc.c b/drivers/usb/gadget/at91_udc.c
index 5a72743606fd..f39050145f1f 100644
--- a/drivers/usb/gadget/at91_udc.c
+++ b/drivers/usb/gadget/at91_udc.c
@@ -1807,16 +1807,13 @@ static int at91udc_suspend(struct platform_device *pdev, pm_message_t mesg)
|| !wake
|| at91_suspend_entering_slow_clock()) {
pullup(udc, 0);
- disable_irq_wake(udc->udp_irq);
+ wake = 0;
} else
enable_irq_wake(udc->udp_irq);
- if (udc->board.vbus_pin > 0) {
- if (wake)
- enable_irq_wake(udc->board.vbus_pin);
- else
- disable_irq_wake(udc->board.vbus_pin);
- }
+ udc->active_suspend = wake;
+ if (udc->board.vbus_pin > 0 && wake)
+ enable_irq_wake(udc->board.vbus_pin);
return 0;
}
@@ -1824,8 +1821,14 @@ static int at91udc_resume(struct platform_device *pdev)
{
struct at91_udc *udc = platform_get_drvdata(pdev);
+ if (udc->board.vbus_pin > 0 && udc->active_suspend)
+ disable_irq_wake(udc->board.vbus_pin);
+
/* maybe reconnect to host; if so, clocks on */
- pullup(udc, 1);
+ if (udc->active_suspend)
+ disable_irq_wake(udc->udp_irq);
+ else
+ pullup(udc, 1);
return 0;
}
#else
diff --git a/drivers/usb/gadget/at91_udc.h b/drivers/usb/gadget/at91_udc.h
index 677089baa59d..7e34e2f864f9 100644
--- a/drivers/usb/gadget/at91_udc.h
+++ b/drivers/usb/gadget/at91_udc.h
@@ -136,6 +136,7 @@ struct at91_udc {
unsigned wait_for_addr_ack:1;
unsigned wait_for_config_ack:1;
unsigned selfpowered:1;
+ unsigned active_suspend:1;
u8 addr;
struct at91_udc_data board;
struct clk *iclk, *fclk;