wusb: do a proper channel stop
When stopping the WUSB channel the host should send Channel Stop IEs giving
the WUSB Channel Time of the last MMC. Both WHCI and HWA hosts provide a
channel stop command for this.
Signed-off-by: David Vrabel <david.vrabel@csr.com>
diff --git a/drivers/usb/host/hwa-hc.c b/drivers/usb/host/hwa-hc.c
index 64be4d8..0e18989 100644
--- a/drivers/usb/host/hwa-hc.c
+++ b/drivers/usb/host/hwa-hc.c
@@ -171,11 +171,6 @@
if (result < 0)
goto error_set_cluster_id;
- result = wa_nep_arm(&hwahc->wa, GFP_KERNEL);
- if (result < 0) {
- dev_err(dev, "cannot listen to notifications: %d\n", result);
- goto error_stop;
- }
usb_hcd->uses_new_polling = 1;
usb_hcd->poll_rh = 1;
usb_hcd->state = HC_STATE_RUNNING;
@@ -185,8 +180,6 @@
d_fnend(4, dev, "(hwahc %p) = %d\n", hwahc, result);
return result;
-error_stop:
- __wa_stop(&hwahc->wa);
error_set_cluster_id:
wusb_cluster_id_put(wusbhc->cluster_id);
error_cluster_id_get:
@@ -194,39 +187,6 @@
}
-/*
- * FIXME: break this function up
- */
-static int __hwahc_op_wusbhc_start(struct wusbhc *wusbhc)
-{
- int result;
- struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
- struct device *dev = &hwahc->wa.usb_iface->dev;
-
- /* Set up a Host Info WUSB Information Element */
- d_fnstart(4, dev, "(hwahc %p)\n", hwahc);
- result = -ENOSPC;
-
- result = __wa_set_feature(&hwahc->wa, WA_ENABLE);
- if (result < 0) {
- dev_err(dev, "error commanding HC to start: %d\n", result);
- goto error_stop;
- }
- result = __wa_wait_status(&hwahc->wa, WA_ENABLE, WA_ENABLE);
- if (result < 0) {
- dev_err(dev, "error waiting for HC to start: %d\n", result);
- goto error_stop;
- }
- result = 0;
-out:
- d_fnend(4, dev, "(hwahc %p) = %d\n", hwahc, result);
- return result;
-
-error_stop:
- result = __wa_clear_feature(&hwahc->wa, WA_ENABLE);
- goto out;
-}
-
static int hwahc_op_suspend(struct usb_hcd *usb_hcd, pm_message_t msg)
{
struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
@@ -246,18 +206,6 @@
return -ENOSYS;
}
-static void __hwahc_op_wusbhc_stop(struct wusbhc *wusbhc)
-{
- int result;
- struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
- struct device *dev = &hwahc->wa.usb_iface->dev;
-
- d_fnstart(4, dev, "(hwahc %p)\n", hwahc);
- /* Nothing for now */
- d_fnend(4, dev, "(hwahc %p) = %d\n", hwahc, result);
- return;
-}
-
/*
* No need to abort pipes, as when this is called, all the children
* has been disconnected and that has done it [through
@@ -275,8 +223,6 @@
d_fnstart(4, dev, "(hwahc %p)\n", hwahc);
mutex_lock(&wusbhc->mutex);
wusbhc_stop(wusbhc);
- wa_nep_disarm(&hwahc->wa);
- result = __wa_stop(&hwahc->wa);
wusb_cluster_id_put(wusbhc->cluster_id);
mutex_unlock(&wusbhc->mutex);
d_fnend(4, dev, "(hwahc %p) = %d\n", hwahc, result);
@@ -325,6 +271,54 @@
rpipe_ep_disable(&hwahc->wa, ep);
}
+static int __hwahc_op_wusbhc_start(struct wusbhc *wusbhc)
+{
+ int result;
+ struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
+ struct device *dev = &hwahc->wa.usb_iface->dev;
+
+ result = __wa_set_feature(&hwahc->wa, WA_ENABLE);
+ if (result < 0) {
+ dev_err(dev, "error commanding HC to start: %d\n", result);
+ goto error_stop;
+ }
+ result = __wa_wait_status(&hwahc->wa, WA_ENABLE, WA_ENABLE);
+ if (result < 0) {
+ dev_err(dev, "error waiting for HC to start: %d\n", result);
+ goto error_stop;
+ }
+ result = wa_nep_arm(&hwahc->wa, GFP_KERNEL);
+ if (result < 0) {
+ dev_err(dev, "cannot listen to notifications: %d\n", result);
+ goto error_stop;
+ }
+ return result;
+
+error_stop:
+ __wa_clear_feature(&hwahc->wa, WA_ENABLE);
+ return result;
+}
+
+static void __hwahc_op_wusbhc_stop(struct wusbhc *wusbhc, int delay)
+{
+ struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
+ struct wahc *wa = &hwahc->wa;
+ u8 iface_no = wa->usb_iface->cur_altsetting->desc.bInterfaceNumber;
+ int ret;
+
+ ret = usb_control_msg(wa->usb_dev, usb_sndctrlpipe(wa->usb_dev, 0),
+ WUSB_REQ_CHAN_STOP,
+ USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
+ delay * 1000,
+ iface_no,
+ NULL, 0, 1000 /* FIXME: arbitrary */);
+ if (ret == 0)
+ msleep(delay);
+
+ wa_nep_disarm(&hwahc->wa);
+ __wa_stop(&hwahc->wa);
+}
+
/*
* Set the UWB MAS allocation for the WUSB cluster
*
diff --git a/drivers/usb/host/whci/whcd.h b/drivers/usb/host/whci/whcd.h
index 1d2a53b..1bbb8cb 100644
--- a/drivers/usb/host/whci/whcd.h
+++ b/drivers/usb/host/whci/whcd.h
@@ -136,7 +136,7 @@
/* wusb.c */
int whc_wusbhc_start(struct wusbhc *wusbhc);
-void whc_wusbhc_stop(struct wusbhc *wusbhc);
+void whc_wusbhc_stop(struct wusbhc *wusbhc, int delay);
int whc_mmcie_add(struct wusbhc *wusbhc, u8 interval, u8 repeat_cnt,
u8 handle, struct wuie_hdr *wuie);
int whc_mmcie_rm(struct wusbhc *wusbhc, u8 handle);
diff --git a/drivers/usb/host/whci/whci-hc.h b/drivers/usb/host/whci/whci-hc.h
index bff1eb7..51df7e3 100644
--- a/drivers/usb/host/whci/whci-hc.h
+++ b/drivers/usb/host/whci/whci-hc.h
@@ -410,6 +410,8 @@
# define WUSBDNTSCTRL_SLOTS(s) ((s) << 0)
#define WUSBTIME 0x68
+# define WUSBTIME_CHANNEL_TIME_MASK 0x00ffffff
+
#define WUSBBPST 0x6c
#define WUSBDIBUPDATED 0x70
diff --git a/drivers/usb/host/whci/wusb.c b/drivers/usb/host/whci/wusb.c
index 66e4ddc..2befd47 100644
--- a/drivers/usb/host/whci/wusb.c
+++ b/drivers/usb/host/whci/wusb.c
@@ -64,8 +64,9 @@
}
/*
- * WHCI starts and stops MMCs based on there being a valid GTK so
- * these need only start/stop the asynchronous and periodic schedules.
+ * WHCI starts MMCs based on there being a valid GTK so these need
+ * only start/stop the asynchronous and periodic schedules and send a
+ * channel stop command.
*/
int whc_wusbhc_start(struct wusbhc *wusbhc)
@@ -78,12 +79,20 @@
return 0;
}
-void whc_wusbhc_stop(struct wusbhc *wusbhc)
+void whc_wusbhc_stop(struct wusbhc *wusbhc, int delay)
{
struct whc *whc = wusbhc_to_whc(wusbhc);
+ u32 stop_time, now_time;
+ int ret;
pzl_stop(whc);
asl_stop(whc);
+
+ now_time = le_readl(whc->base + WUSBTIME) & WUSBTIME_CHANNEL_TIME_MASK;
+ stop_time = (now_time + ((delay * 8) << 7)) & 0x00ffffff;
+ ret = whc_do_gencmd(whc, WUSBGENCMDSTS_CHAN_STOP, stop_time, NULL, 0);
+ if (ret == 0)
+ msleep(delay);
}
int whc_mmcie_add(struct wusbhc *wusbhc, u8 interval, u8 repeat_cnt,