aboutsummaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorOlav Kongas <ok@artecdesign.ee>2005-10-28 15:04:45 +0300
committerGreg Kroah-Hartman <gregkh@suse.de>2006-01-04 13:48:29 -0800
commit535488fcf1e4b2331e1c4a1eb67ca09468c13507 (patch)
tree285a6e02054bb5a661605649d3527a73bbdba466
parent61a87adf2e7b410da8e41799c61c21a7b8c8b001 (diff)
downloadkernel_samsung_smdk4412-535488fcf1e4b2331e1c4a1eb67ca09468c13507.zip
kernel_samsung_smdk4412-535488fcf1e4b2331e1c4a1eb67ca09468c13507.tar.gz
kernel_samsung_smdk4412-535488fcf1e4b2331e1c4a1eb67ca09468c13507.tar.bz2
[PATCH] USB: isp116x-hcd: support reiniting HC on resume
Until now the isp116x-hcd had no support to reinitialize the HC on resume, if the controller lost its state during suspend. This patch, generated against your Oct 26 git tree, adds that support. The patch is basically the same as the one tested by Ivan Kalatchev, who reported the problem, on 2.6.13. Please apply, Support reinitializing the isp116x host controller from scratch on resume, if the controller has lost its state. Signed-off-by: Olav Kongas <ok@artecdesign.ee> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
-rw-r--r--drivers/usb/host/isp116x-hcd.c26
1 files changed, 18 insertions, 8 deletions
diff --git a/drivers/usb/host/isp116x-hcd.c b/drivers/usb/host/isp116x-hcd.c
index 82f6498..5f56c4a 100644
--- a/drivers/usb/host/isp116x-hcd.c
+++ b/drivers/usb/host/isp116x-hcd.c
@@ -1201,11 +1201,14 @@ static int isp116x_bus_suspend(struct usb_hcd *hcd)
return ret;
}
+/* Get rid of these declarations later in cleanup */
+static int isp116x_reset(struct usb_hcd *hcd);
+static int isp116x_start(struct usb_hcd *hcd);
+
static int isp116x_bus_resume(struct usb_hcd *hcd)
{
struct isp116x *isp116x = hcd_to_isp116x(hcd);
u32 val;
- int ret = -EINPROGRESS;
msleep(5);
spin_lock_irq(&isp116x->lock);
@@ -1219,20 +1222,27 @@ static int isp116x_bus_resume(struct usb_hcd *hcd)
case HCCONTROL_USB_RESUME:
break;
case HCCONTROL_USB_OPER:
+ spin_unlock_irq(&isp116x->lock);
/* Without setting power_state here the
SUSPENDED state won't be removed from
sysfs/usbN/power.state as a response to remote
wakeup. Maybe in the future. */
hcd->self.root_hub->dev.power.power_state = PMSG_ON;
- ret = 0;
- break;
+ return 0;
default:
- ret = -EBUSY;
- }
-
- if (ret != -EINPROGRESS) {
+ /* HCCONTROL_USB_RESET: this may happen, when during
+ suspension the HC lost power. Reinitialize completely */
spin_unlock_irq(&isp116x->lock);
- return ret;
+ DBG("Chip has been reset while suspended. Reinit from scratch.\n");
+ isp116x_reset(hcd);
+ isp116x_start(hcd);
+ isp116x_hub_control(hcd, SetPortFeature,
+ USB_PORT_FEAT_POWER, 1, NULL, 0);
+ if ((isp116x->rhdesca & RH_A_NDP) == 2)
+ isp116x_hub_control(hcd, SetPortFeature,
+ USB_PORT_FEAT_POWER, 2, NULL, 0);
+ hcd->self.root_hub->dev.power.power_state = PMSG_ON;
+ return 0;
}
val = isp116x->rhdesca & RH_A_NDP;