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USB iso mode fixes

Browse Source 
Resolves an issue where isochronouse USB would cause the driver to hang as
well as scheduling issues.
 
 
Signed-off-by: Tim Harvey <tharvey@gateworks.com>


git-svn-id: svn://svn.openwrt.org/openwrt/trunk@33579 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
kaloz 2012-09-28 17:31:22 +00:00
parent 98353f24a2
commit 07511ec793
1 changed files with 237 additions and 132 deletions
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369
target/linux/cns3xxx/patches-3.3/200-dwc_otg.patch
View File

@ -7887,7 +7887,7 @@
+#endif
--- /dev/null
+++ b/drivers/usb/dwc/otg_hcd.c
@@ -0,0 +1,2735 @@
@@ -0,0 +1,2752 @@
+/* ==========================================================================
+ * $File: //dwh/usb_iip/dev/software/otg/linux/drivers/dwc_otg_hcd.c $
+ * $Revision: #75 $
@ -8056,7 +8056,9 @@
+ dwc_otg_qh_t *qh;
+ struct list_head *qtd_item;
+ dwc_otg_qtd_t *qtd;
+ unsigned long flags;
+
+ SPIN_LOCK_IRQSAVE(&hcd->lock, flags);
+ list_for_each(qh_item, qh_list) {
+ qh = list_entry(qh_item, dwc_otg_qh_t, qh_list_entry);
+ for (qtd_item = qh->qtd_list.next;
@ -8070,6 +8072,7 @@
+ dwc_otg_hcd_qtd_remove_and_free(hcd, qtd);
+ }
+ }
+ SPIN_UNLOCK_IRQRESTORE(&hcd->lock, flags);
+}
+
+/**
@ -8313,10 +8316,14 @@
+ hcd->regs = otg_dev->base;
+ hcd->self.otg_port = 1;
+
+ /* Integrate TT in root hub, by default this is disbled. */
+ hcd->has_tt = 1;
+
+ /* Initialize the DWC OTG HCD. */
+ dwc_otg_hcd = hcd_to_dwc_otg_hcd(hcd);
+ dwc_otg_hcd->core_if = otg_dev->core_if;
+ otg_dev->hcd = dwc_otg_hcd;
+ init_hcd_usecs(dwc_otg_hcd);
+
+ /* */
+ spin_lock_init(&dwc_otg_hcd->lock);
@ -8534,6 +8541,7 @@
+{
+ struct list_head *item;
+ dwc_otg_qh_t *qh;
+ unsigned long flags;
+
+ if (!qh_list->next) {
+ /* The list hasn't been initialized yet. */
@ -8543,10 +8551,12 @@
+ /* Ensure there are no QTDs or URBs left. */
+ kill_urbs_in_qh_list(hcd, qh_list);
+
+ SPIN_LOCK_IRQSAVE(&hcd->lock, flags);
+ for (item = qh_list->next; item != qh_list; item = qh_list->next) {
+ qh = list_entry(item, dwc_otg_qh_t, qh_list_entry);
+ dwc_otg_hcd_qh_remove_and_free(hcd, qh);
+ }
+ SPIN_UNLOCK_IRQRESTORE(&hcd->lock, flags);
+}
+
+/**
@ -8838,6 +8848,10 @@
+ urb_qtd = (dwc_otg_qtd_t *)urb->hcpriv;
+ qh = (dwc_otg_qh_t *)ep->hcpriv;
+
+ if (urb_qtd == NULL) {
+ SPIN_UNLOCK_IRQRESTORE(&dwc_otg_hcd->lock, flags);
+ return 0;
+ }
+#ifdef DEBUG
+ if (CHK_DEBUG_LEVEL(DBG_HCDV | DBG_HCD_URB)) {
+ dump_urb_info(urb, "dwc_otg_hcd_urb_dequeue");
@ -8869,15 +8883,17 @@
+ */
+ dwc_otg_hcd_qtd_remove_and_free(dwc_otg_hcd, urb_qtd);
+ if (urb_qtd == qh->qtd_in_process) {
+ /* Note that dwc_otg_hcd_qh_deactivate() locks the spin_lock again */
+ SPIN_UNLOCK_IRQRESTORE(&dwc_otg_hcd->lock, flags);
+ dwc_otg_hcd_qh_deactivate(dwc_otg_hcd, qh, 0);
+ qh->channel = NULL;
+ qh->qtd_in_process = NULL;
+ } else if (list_empty(&qh->qtd_list)) {
+ dwc_otg_hcd_qh_remove(dwc_otg_hcd, qh);
+ } else {
+ if (list_empty(&qh->qtd_list))
+ dwc_otg_hcd_qh_remove(dwc_otg_hcd, qh);
+ SPIN_UNLOCK_IRQRESTORE(&dwc_otg_hcd->lock, flags);
+ }
+
+ SPIN_UNLOCK_IRQRESTORE(&dwc_otg_hcd->lock, flags);
+
+ urb->hcpriv = NULL;
+
+ /* Higher layer software sets URB status. */
@ -8928,7 +8944,6 @@
+ ep->hcpriv = NULL;
+done:
+ SPIN_UNLOCK_IRQRESTORE(&dwc_otg_hcd->lock, flags);
+
+}
+
+/** Handles host mode interrupts for the DWC_otg controller. Returns IRQ_NONE if
@ -10085,6 +10100,7 @@
+ DWC_DEBUGPL(DBG_HCD, " Select Transactions\n");
+#endif
+
+ spin_lock(&hcd->lock);
+ /* Process entries in the periodic ready list. */
+ qh_ptr = hcd->periodic_sched_ready.next;
+ while (qh_ptr != &hcd->periodic_sched_ready &&
@ -10133,6 +10149,7 @@
+
+ hcd->non_periodic_channels++;
+ }
+ spin_unlock(&hcd->lock);
+
+ return ret_val;
+}
@ -10625,7 +10642,7 @@
+#endif /* DWC_DEVICE_ONLY */
--- /dev/null
+++ b/drivers/usb/dwc/otg_hcd.h
@@ -0,0 +1,647 @@
@@ -0,0 +1,652 @@
+/* ==========================================================================
+ * $File: //dwh/usb_iip/dev/software/otg/linux/drivers/dwc_otg_hcd.h $
+ * $Revision: #45 $
@ -10825,6 +10842,9 @@
+ /** (micro)frame at which last start split was initialized. */
+ uint16_t start_split_frame;
+
+ u16 speed;
+ u16 frame_usecs[8];
+
+ /** @} */
+
+ /** Entry for QH in either the periodic or non-periodic schedule. */
@ -10928,6 +10948,18 @@
+ */
+ uint16_t periodic_usecs;
+
+ /*
+ * Total bandwidth claimed so far for all periodic transfers
+ * in a frame.
+ * This will include a mixture of HS and FS transfers.
+ * Units are microseconds per (micro)frame.
+ * We have a budget per frame and have to schedule
+ * transactions accordingly.
+ * Watch out for the fact that things are actually scheduled for the
+ * "next frame".
+ */
+ u16 frame_usecs[8];
+
+ /**
+ * Frame number read from the core at SOF. The value ranges from 0 to
+ * DWC_HFNUM_MAX_FRNUM.
@ -11089,6 +11121,7 @@
+/** @{ */
+
+/* Implemented in dwc_otg_hcd_queue.c */
+extern int init_hcd_usecs(dwc_otg_hcd_t *hcd);
+extern dwc_otg_qh_t *dwc_otg_hcd_qh_create(dwc_otg_hcd_t *hcd, struct urb *urb);
+extern void dwc_otg_hcd_qh_init(dwc_otg_hcd_t *hcd, dwc_otg_qh_t *qh, struct urb *urb);
+extern void dwc_otg_hcd_qh_free(dwc_otg_hcd_t *hcd, dwc_otg_qh_t *qh);
@ -11130,21 +11163,10 @@
+ kfree(qtd);
+}
+
+/** Removes a QTD from list.
+ * @param[in] hcd HCD instance.
+ * @param[in] qtd QTD to remove from list. */
+static inline void dwc_otg_hcd_qtd_remove(dwc_otg_hcd_t *hcd, dwc_otg_qtd_t *qtd)
+{
+ unsigned long flags;
+ SPIN_LOCK_IRQSAVE(&hcd->lock, flags);
+ list_del(&qtd->qtd_list_entry);
+ SPIN_UNLOCK_IRQRESTORE(&hcd->lock, flags);
+}
+
+/** Remove and free a QTD */
+static inline void dwc_otg_hcd_qtd_remove_and_free(dwc_otg_hcd_t *hcd, dwc_otg_qtd_t *qtd)
+{
+ dwc_otg_hcd_qtd_remove(hcd, qtd);
+ list_del(&qtd->qtd_list_entry);
+ dwc_otg_hcd_qtd_free(qtd);
+}
+
@ -11275,7 +11297,7 @@
+#endif /* DWC_DEVICE_ONLY */
--- /dev/null
+++ b/drivers/usb/dwc/otg_hcd_intr.c
@@ -0,0 +1,1826 @@
@@ -0,0 +1,1828 @@
+/* ==========================================================================
+ * $File: //dwh/usb_iip/dev/software/otg/linux/drivers/dwc_otg_hcd_intr.c $
+ * $Revision: #70 $
@ -11884,6 +11906,7 @@
+
+ DWC_DEBUGPL(DBG_HCDV, " %s(%p,%p,%d)\n", __func__, hcd, qh, free_qtd);
+
+ spin_lock(&hcd->lock);
+ qtd = list_entry(qh->qtd_list.next, dwc_otg_qtd_t, qtd_list_entry);
+
+ if (qtd->complete_split) {
@ -11900,6 +11923,7 @@
+
+ qh->channel = NULL;
+ qh->qtd_in_process = NULL;
+ spin_unlock(&hcd->lock);
+ dwc_otg_hcd_qh_deactivate(hcd, qh, continue_split);
+}
+
@ -13104,7 +13128,7 @@
+#endif /* DWC_DEVICE_ONLY */
--- /dev/null
+++ b/drivers/usb/dwc/otg_hcd_queue.c
@@ -0,0 +1,713 @@
@@ -0,0 +1,794 @@
+/* ==========================================================================
+ * $File: //dwh/usb_iip/dev/software/otg/linux/drivers/dwc_otg_hcd_queue.c $
+ * $Revision: #33 $
@ -13262,6 +13286,7 @@
+ INIT_LIST_HEAD(&qh->qtd_list);
+ INIT_LIST_HEAD(&qh->qh_list_entry);
+ qh->channel = NULL;
+ qh->speed = urb->dev->speed;
+
+ /* FS/LS Enpoint on HS Hub
+ * NOT virtual root hub */
@ -13283,10 +13308,10 @@
+
+ /** @todo Account for split transfers in the bus time. */
+ int bytecount = dwc_hb_mult(qh->maxp) * dwc_max_packet(qh->maxp);
+ qh->usecs = usb_calc_bus_time(urb->dev->speed,
+ qh->usecs = NS_TO_US(usb_calc_bus_time(urb->dev->speed,
+ usb_pipein(urb->pipe),
+ (qh->ep_type == USB_ENDPOINT_XFER_ISOC),
+ bytecount);
+ bytecount));
+
+ /* Start in a slightly future (micro)frame. */
+ qh->sched_frame = dwc_frame_num_inc(hcd->frame_number,
@ -13365,73 +13390,159 @@
+}
+
+/**
+ * Checks that a channel is available for a periodic transfer.
+ *
+ * @return 0 if successful, negative error code otherise.
+ * Microframe scheduler
+ * track the total use in hcd->frame_usecs
+ * keep each qh use in qh->frame_usecs
+ * when surrendering the qh then donate the time back
+ */
+static int periodic_channel_available(dwc_otg_hcd_t *hcd)
+static const u16 max_uframe_usecs[] = { 100, 100, 100, 100, 100, 100, 30, 0 };
+
+/*
+ * called from dwc_otg_hcd.c:dwc_otg_hcd_init
+ */
+int init_hcd_usecs(dwc_otg_hcd_t *hcd)
+{
+ /*
+ * Currently assuming that there is a dedicated host channnel for each
+ * periodic transaction plus at least one host channel for
+ * non-periodic transactions.
+ */
+ int status;
+ int num_channels;
+ int i;
+
+ num_channels = hcd->core_if->core_params->host_channels;
+ if ((hcd->periodic_channels + hcd->non_periodic_channels < num_channels) &&
+ (hcd->periodic_channels < num_channels - 1)) {
+ status = 0;
+ }
+ else {
+ DWC_NOTICE("%s: Total channels: %d, Periodic: %d, Non-periodic: %d\n",
+ __func__, num_channels, hcd->periodic_channels,
+ hcd->non_periodic_channels);
+ status = -ENOSPC;
+ }
+ for (i = 0; i < 8; i++)
+ hcd->frame_usecs[i] = max_uframe_usecs[i];
+
+ return status;
+ return 0;
+}
+
+/**
+ * Checks that there is sufficient bandwidth for the specified QH in the
+ * periodic schedule. For simplicity, this calculation assumes that all the
+ * transfers in the periodic schedule may occur in the same (micro)frame.
+ *
+ * @param hcd The HCD state structure for the DWC OTG controller.
+ * @param qh QH containing periodic bandwidth required.
+ *
+ * @return 0 if successful, negative error code otherwise.
+ */
+static int check_periodic_bandwidth(dwc_otg_hcd_t *hcd, dwc_otg_qh_t *qh)
+static int find_single_uframe(dwc_otg_hcd_t *hcd, dwc_otg_qh_t *qh)
+{
+ int status;
+ uint16_t max_claimed_usecs;
+ int i;
+ u16 utime;
+ int t_left;
+ int ret;
+ int done;
+
+ status = 0;
+
+ if (hcd->core_if->core_params->speed == DWC_SPEED_PARAM_HIGH) {
+ /*
+ * High speed mode.
+ * Max periodic usecs is 80% x 125 usec = 100 usec.
+ */
+ max_claimed_usecs = 100 - qh->usecs;
+ } else {
+ /*
+ * Full speed mode.
+ * Max periodic usecs is 90% x 1000 usec = 900 usec.
+ */
+ max_claimed_usecs = 900 - qh->usecs;
+ ret = -1;
+ utime = qh->usecs;
+ t_left = utime;
+ i = 0;
+ done = 0;
+ while (done == 0) {
+ /* At the start hcd->frame_usecs[i] = max_uframe_usecs[i]; */
+ if (utime <= hcd->frame_usecs[i]) {
+ hcd->frame_usecs[i] -= utime;
+ qh->frame_usecs[i] += utime;
+ t_left -= utime;
+ ret = i;
+ done = 1;
+ return ret;
+ } else {
+ i++;
+ if (i == 8) {
+ done = 1;
+ ret = -1;
+ }
+ }
+ }
+ return ret;
+}
+
+ if (hcd->periodic_usecs > max_claimed_usecs) {
+ DWC_NOTICE("%s: already claimed usecs %d, required usecs %d\n",
+ __func__, hcd->periodic_usecs, qh->usecs);
+ status = -ENOSPC;
+/*
+ * use this for FS apps that can span multiple uframes
+ */
+static int find_multi_uframe(dwc_otg_hcd_t *hcd, dwc_otg_qh_t *qh)
+{
+ int i;
+ int j;
+ u16 utime;
+ int t_left;
+ int ret;
+ int done;
+ u16 xtime;
+
+ ret = -1;
+ utime = qh->usecs;
+ t_left = utime;
+ i = 0;
+ done = 0;
+loop:
+ while (done == 0) {
+ if (hcd->frame_usecs[i] <= 0) {
+ i++;
+ if (i == 8) {
+ done = 1;
+ ret = -1;
+ }
+ goto loop;
+ }
+
+ /*
+ * We need n consequtive slots so use j as a start slot.
+ * j plus j+1 must be enough time (for now)
+ */
+ xtime = hcd->frame_usecs[i];
+ for (j = i + 1; j < 8; j++) {
+ /*
+ * if we add this frame remaining time to xtime we may
+ * be OK, if not we need to test j for a complete frame.
+ */
+ if ((xtime + hcd->frame_usecs[j]) < utime) {
+ if (hcd->frame_usecs[j] < max_uframe_usecs[j]) {
+ j = 8;
+ ret = -1;
+ continue;
+ }
+ }
+ if (xtime >= utime) {
+ ret = i;
+ j = 8; /* stop loop with a good value ret */
+ continue;
+ }
+ /* add the frame time to x time */
+ xtime += hcd->frame_usecs[j];
+ /* we must have a fully available next frame or break */
+ if ((xtime < utime) &&
+ (hcd->frame_usecs[j] == max_uframe_usecs[j])) {
+ ret = -1;
+ j = 8; /* stop loop with a bad value ret */
+ continue;
+ }
+ }
+ if (ret >= 0) {
+ t_left = utime;
+ for (j = i; (t_left > 0) && (j < 8); j++) {
+ t_left -= hcd->frame_usecs[j];
+ if (t_left <= 0) {
+ qh->frame_usecs[j] +=
+ hcd->frame_usecs[j] + t_left;
+ hcd->frame_usecs[j] = -t_left;
+ ret = i;
+ done = 1;
+ } else {
+ qh->frame_usecs[j] +=
+ hcd->frame_usecs[j];
+ hcd->frame_usecs[j] = 0;
+ }
+ }
+ } else {
+ i++;
+ if (i == 8) {
+ done = 1;
+ ret = -1;
+ }
+ }
+ }
+ return ret;
+}
+
+ return status;
+static int find_uframe(dwc_otg_hcd_t *hcd, dwc_otg_qh_t *qh)
+{
+ int ret = -1;
+
+ if (qh->speed == USB_SPEED_HIGH)
+ /* if this is a hs transaction we need a full frame */
+ ret = find_single_uframe(hcd, qh);
+ else
+ /* FS transaction may need a sequence of frames */
+ ret = find_multi_uframe(hcd, qh);
+
+ return ret;
+}
+
+/**
@ -13467,58 +13578,55 @@
+
+/**
+ * Schedules an interrupt or isochronous transfer in the periodic schedule.
+ *
+ * @param hcd The HCD state structure for the DWC OTG controller.
+ * @param qh QH for the periodic transfer. The QH should already contain the
+ * scheduling information.
+ *
+ * @return 0 if successful, negative error code otherwise.
+ */
+static int schedule_periodic(dwc_otg_hcd_t *hcd, dwc_otg_qh_t *qh)
+{
+ int status = 0;
+ int status;
+ struct usb_bus *bus = hcd_to_bus(dwc_otg_hcd_to_hcd(hcd));
+ int frame;
+
+ status = periodic_channel_available(hcd);
+ status = find_uframe(hcd, qh);
+ frame = -1;
+ if (status == 0) {
+ frame = 7;
+ } else {
+ if (status > 0)
+ frame = status - 1;
+ }
+ /* Set the new frame up */
+ if (frame > -1) {
+ qh->sched_frame &= ~0x7;
+ qh->sched_frame |= (frame & 7);
+ }
+ if (status != -1)
+ status = 0;
+ if (status) {
+ DWC_NOTICE("%s: No host channel available for periodic "
+ "transfer.\n", __func__);
+ pr_notice("%s: Insufficient periodic bandwidth for "
+ "periodic transfer.\n", __func__);
+ return status;
+ }
+
+ status = check_periodic_bandwidth(hcd, qh);
+ if (status) {
+ DWC_NOTICE("%s: Insufficient periodic bandwidth for "
+ "periodic transfer.\n", __func__);
+ return status;
+ }
+
+ status = check_max_xfer_size(hcd, qh);
+ if (status) {
+ DWC_NOTICE("%s: Channel max transfer size too small "
+ "for periodic transfer.\n", __func__);
+ pr_notice("%s: Channel max transfer size too small "
+ "for periodic transfer.\n", __func__);
+ return status;
+ }
+
+ /* Always start in the inactive schedule. */
+ list_add_tail(&qh->qh_list_entry, &hcd->periodic_sched_inactive);
+
+ /* Reserve the periodic channel. */
+ hcd->periodic_channels++;
+
+ /* Update claimed usecs per (micro)frame. */
+ hcd->periodic_usecs += qh->usecs;
+
+ /* Update average periodic bandwidth claimed and # periodic reqs for usbfs. */
+ hcd_to_bus(dwc_otg_hcd_to_hcd(hcd))->bandwidth_allocated += qh->usecs / qh->interval;
+ if (qh->ep_type == USB_ENDPOINT_XFER_INT) {
+ hcd_to_bus(dwc_otg_hcd_to_hcd(hcd))->bandwidth_int_reqs++;
+ DWC_DEBUGPL(DBG_HCD, "Scheduled intr: qh %p, usecs %d, period %d\n",
+ qh, qh->usecs, qh->interval);
+ } else {
+ hcd_to_bus(dwc_otg_hcd_to_hcd(hcd))->bandwidth_isoc_reqs++;
+ DWC_DEBUGPL(DBG_HCD, "Scheduled isoc: qh %p, usecs %d, period %d\n",
+ qh, qh->usecs, qh->interval);
+ }
+ /*
+ * Update average periodic bandwidth claimed and # periodic reqs for
+ * usbfs.
+ */
+ bus->bandwidth_allocated += qh->usecs / qh->interval;
+
+ if (qh->ep_type == USB_ENDPOINT_XFER_INT)
+ bus->bandwidth_int_reqs++;
+ else
+ bus->bandwidth_isoc_reqs++;
+
+ return status;
+}
@ -13569,32 +13677,29 @@
+
+/**
+ * Removes an interrupt or isochronous transfer from the periodic schedule.
+ *
+ * @param hcd The HCD state structure for the DWC OTG controller.
+ * @param qh QH for the periodic transfer.
+ */
+static void deschedule_periodic(dwc_otg_hcd_t *hcd, dwc_otg_qh_t *qh)
+{
+ struct usb_bus *bus = hcd_to_bus(dwc_otg_hcd_to_hcd(hcd));
+ int i;
+
+ list_del_init(&qh->qh_list_entry);
+
+ /* Release the periodic channel reservation. */
+ hcd->periodic_channels--;
+
+ /* Update claimed usecs per (micro)frame. */
+ hcd->periodic_usecs -= qh->usecs;
+
+ /* Update average periodic bandwidth claimed and # periodic reqs for usbfs. */
+ hcd_to_bus(dwc_otg_hcd_to_hcd(hcd))->bandwidth_allocated -= qh->usecs / qh->interval;
+
+ if (qh->ep_type == USB_ENDPOINT_XFER_INT) {
+ hcd_to_bus(dwc_otg_hcd_to_hcd(hcd))->bandwidth_int_reqs--;
+ DWC_DEBUGPL(DBG_HCD, "Descheduled intr: qh %p, usecs %d, period %d\n",
+ qh, qh->usecs, qh->interval);
+ } else {
+ hcd_to_bus(dwc_otg_hcd_to_hcd(hcd))->bandwidth_isoc_reqs--;
+ DWC_DEBUGPL(DBG_HCD, "Descheduled isoc: qh %p, usecs %d, period %d\n",
+ qh, qh->usecs, qh->interval);
+ for (i = 0; i < 8; i++) {
+ hcd->frame_usecs[i] += qh->frame_usecs[i];
+ qh->frame_usecs[i] = 0;
+ }
+ /*
+ * Update average periodic bandwidth claimed and # periodic reqs for
+ * usbfs.
+ */
+ bus->bandwidth_allocated -= qh->usecs / qh->interval;
+
+ if (qh->ep_type == USB_ENDPOINT_XFER_INT)
+ bus->bandwidth_int_reqs--;
+ else
+ bus->bandwidth_isoc_reqs--;
+}
+
+/**