return "UNLINK";
case ED_OPER:
return "OPER";
- case ED_NEW:
- return "NEW";
}
return "?STATE";
}
return "?TOGGLE";
}
+/*-------------------------------------------------------------------------*/
+
#ifdef DEBUG
/* debug| print the main components of an URB
* small: 0) header + data packets 1) just header
*/
static void __attribute__((unused))
-urb_print(struct admhcd *ahcd, struct urb * urb, char * str, int small)
+urb_print(struct admhcd *ahcd, struct urb *urb, char * str, int small)
{
unsigned int pipe = urb->pipe;
if (!urb->dev || !urb->dev->bus) {
- admhc_dbg(ahcd, "%s URB: no dev", str);
+ admhc_dbg("%s URB: no dev", str);
return;
}
if (urb->status != 0)
#endif
admhc_dbg(ahcd, "URB-%s %p dev=%d ep=%d%s-%s flags=%x len=%d/%d "
- "stat=%d\n",
+ "stat=%d",
str,
urb,
- usb_pipedevice(pipe),
- usb_pipeendpoint(pipe),
+ usb_pipedevice (pipe),
+ usb_pipeendpoint (pipe),
usb_pipeout(pipe)? "out" : "in",
pipestring(pipe),
urb->transfer_flags,
int i, len;
if (usb_pipecontrol(pipe)) {
- admhc_dbg(admhc, "setup(8): ");
+ admhc_dbg(ahcd, "setup(8):");
for (i = 0; i < 8 ; i++)
printk (" %02x", ((__u8 *) urb->setup_packet) [i]);
printk ("\n");
}
if (urb->transfer_buffer_length > 0 && urb->transfer_buffer) {
- admhc_dbg(admhc, "data(%d/%d): ",
+ printk(KERN_DEBUG __FILE__ ": data(%d/%d):",
urb->actual_length,
urb->transfer_buffer_length);
len = usb_pipeout(pipe)?
urb->transfer_buffer_length: urb->actual_length;
for (i = 0; i < 16 && i < len; i++)
printk (" %02x", ((__u8 *) urb->transfer_buffer) [i]);
- printk ("%s stat:%d\n", i < len? "...": "", urb->status);
+ admhc_dbg("%s stat:%d\n", i < len? "...": "", urb->status);
}
}
#endif /* ADMHC_VERBOSE_DEBUG */
(tmp & TD_IE) ? " IE" : "");
}
-static void admhc_dump_up(const struct admhcd *ahcd, const char *label,
- const struct urb_priv *up)
-{
- int i;
-
- admhc_dbg(ahcd, "%s urb/%p:\n", label, up->urb);
- for (i = 0; i < up->td_cnt; i++) {
- struct td *td = up->td[i];
- admhc_dump_td(ahcd, " ->", td);
- }
-}
-
/* caller MUST own hcd spinlock if verbose is set! */
static void __attribute__((unused))
admhc_dump_ed(const struct admhcd *ahcd, const char *label,
ED_FA_GET(tmp));
tmp = hc32_to_cpup(ahcd, &ed->hwHeadP);
- admhc_dbg(ahcd, " tds: head %08x tail %08x %s%s\n",
+ admhc_dbg(ahcd, " tds: head %08x tail %08x %s%s%s\n",
tmp & TD_MASK,
- hc32_to_cpup(ahcd, &ed->hwTailP),
+ hc32_to_cpup (ahcd, &ed->hwTailP),
(tmp & ED_C) ? data1 : data0,
- (tmp & ED_H) ? " HALT" : "");
-
- if (ed->urb_active)
- admhc_dump_up(ahcd, " active ", ed->urb_active);
+ (tmp & ED_H) ? " HALT" : "",
+ verbose ? " td list follows" : " (not listing)");
- if ((verbose) && (!list_empty(&ed->urb_pending))) {
- struct list_head *entry;
- /* dump pending URBs */
- list_for_each(entry, &ed->urb_pending) {
- struct urb_priv *up;
- up = list_entry(entry, struct urb_priv, pending);
- admhc_dump_up(ahcd, " pending ", up);
+ if (verbose) {
+ struct list_head *tmp;
+
+ /* use ed->td_list because HC concurrently modifies
+ * hwNextTD as it accumulates ed_donelist.
+ */
+ list_for_each(tmp, &ed->td_list) {
+ struct td *td;
+ td = list_entry(tmp, struct td, td_list);
+ admhc_dump_td (ahcd, " ->", td);
}
}
}
#else /* ifdef DEBUG */
static inline void urb_print(struct urb * urb, char * str, int small) {}
-static inline void admhc_dump_up(const struct admhcd *ahcd, const char *label,
- const struct urb_priv *up) {}
static inline void admhc_dump_ed(const struct admhcd *ahcd, const char *label,
const struct ed *ed, int verbose) {}
static inline void admhc_dump_td(const struct admhcd *ahcd, const char *label,
#else
-static ssize_t
-show_urb_priv(struct admhcd *ahcd, char *buf, size_t count,
- struct urb_priv *up)
-{
- unsigned temp, size = count;
- int i;
-
- if (!up)
- return 0;
-
- temp = scnprintf(buf, size,"\n\turb %p ", up->urb);
- size -= temp;
- buf += temp;
-
- for (i = 0; i< up->td_cnt; i++) {
- struct td *td;
- u32 dbp, cbl, info;
-
- td = up->td[i];
- info = hc32_to_cpup(ahcd, &td->hwINFO);
- dbp = hc32_to_cpup(ahcd, &td->hwDBP);
- cbl = hc32_to_cpup(ahcd, &td->hwCBL);
-
- temp = scnprintf(buf, size,
- "\n\t\ttd %p %s %d %s%scc=%x (%08x,%08x)",
- td,
- td_pidstring(info),
- TD_BL_GET(cbl),
- (info & TD_OWN) ? "WORK " : "DONE ",
- (cbl & TD_IE) ? "IE " : "",
- TD_CC_GET(info), info, cbl);
- size -= temp;
- buf += temp;
- }
-
- return count - size;
-}
-
static ssize_t
show_list(struct admhcd *ahcd, char *buf, size_t count, struct ed *ed)
{
while (ed) {
u32 info = hc32_to_cpu(ahcd, ed->hwINFO);
u32 headp = hc32_to_cpu(ahcd, ed->hwHeadP);
+ u32 tailp = hc32_to_cpu(ahcd, ed->hwTailP);
+ struct list_head *entry;
+ struct td *td;
temp = scnprintf(buf, size,
- "ed/%p %s %cs dev%d ep%d %s%smax %d %08x%s%s %s",
+ "ed/%p %s %s %cs dev%d ep%d %s%smax %d %08x%s%s %s"
+ " h:%08x t:%08x",
ed,
+ ed_statestring(ed->state),
ed_typestring (ed->type),
(info & ED_SPEED_FULL) ? 'f' : 'l',
info & ED_FA_MASK,
info,
(info & ED_SKIP) ? " S" : "",
(headp & ED_H) ? " H" : "",
- (headp & ED_C) ? "DATA1" : "DATA0");
+ (headp & ED_C) ? data1 : data0,
+ headp & ED_MASK,tailp);
size -= temp;
buf += temp;
- if (ed->urb_active) {
- temp = scnprintf(buf, size, "\nactive urb:");
- size -= temp;
- buf += temp;
-
- temp = show_urb_priv(ahcd, buf, size, ed->urb_active);
+ list_for_each(entry, &ed->td_list) {
+ u32 dbp, cbl;
+
+ td = list_entry(entry, struct td, td_list);
+ info = hc32_to_cpup (ahcd, &td->hwINFO);
+ dbp = hc32_to_cpup (ahcd, &td->hwDBP);
+ cbl = hc32_to_cpup (ahcd, &td->hwCBL);
+
+ temp = scnprintf(buf, size,
+ "\n\ttd/%p %s %d %s%scc=%x urb %p (%08x,%08x)",
+ td,
+ td_pidstring(info),
+ TD_BL_GET(cbl),
+ (info & TD_OWN) ? "" : "DONE ",
+ (cbl & TD_IE) ? "IE " : "",
+ TD_CC_GET (info), td->urb, info, cbl);
size -= temp;
buf += temp;
}
- if (!list_empty(&ed->urb_pending)) {
- struct list_head *entry;
-
- temp = scnprintf(buf, size, "\npending urbs:");
- size -= temp;
- buf += temp;
-
- list_for_each(entry, &ed->urb_pending) {
- struct urb_priv *up;
- up = list_entry(entry, struct urb_priv,
- pending);
-
- temp = show_urb_priv(ahcd, buf, size, up);
- size -= temp;
- buf += temp;
- }
- }
-
temp = scnprintf(buf, size, "\n");
size -= temp;
buf += temp;
ed = ed->ed_next;
}
-
return count - size;
}
}
static CLASS_DEVICE_ATTR(async, S_IRUGO, show_async, NULL);
+
+#define DBG_SCHED_LIMIT 64
+
+static ssize_t
+show_periodic(struct class_device *class_dev, char *buf)
+{
+ struct usb_bus *bus;
+ struct usb_hcd *hcd;
+ struct admhcd *ahcd;
+ struct ed **seen, *ed;
+ unsigned long flags;
+ unsigned temp, size, seen_count;
+ char *next;
+ unsigned i;
+
+ if (!(seen = kmalloc(DBG_SCHED_LIMIT * sizeof *seen, GFP_ATOMIC)))
+ return 0;
+ seen_count = 0;
+
+ bus = class_get_devdata(class_dev);
+ hcd = bus_to_hcd(bus);
+ ahcd = hcd_to_admhcd(hcd);
+ next = buf;
+ size = PAGE_SIZE;
+
+ temp = scnprintf(next, size, "size = %d\n", NUM_INTS);
+ size -= temp;
+ next += temp;
+
+ /* dump a snapshot of the periodic schedule (and load) */
+ spin_lock_irqsave(&ahcd->lock, flags);
+ for (i = 0; i < NUM_INTS; i++) {
+ if (!(ed = ahcd->periodic [i]))
+ continue;
+
+ temp = scnprintf(next, size, "%2d [%3d]:", i, ahcd->load [i]);
+ size -= temp;
+ next += temp;
+
+ do {
+ temp = scnprintf(next, size, " ed%d/%p",
+ ed->interval, ed);
+ size -= temp;
+ next += temp;
+ for (temp = 0; temp < seen_count; temp++) {
+ if (seen [temp] == ed)
+ break;
+ }
+
+ /* show more info the first time around */
+ if (temp == seen_count) {
+ u32 info = hc32_to_cpu (ahcd, ed->hwINFO);
+ struct list_head *entry;
+ unsigned qlen = 0;
+
+ /* qlen measured here in TDs, not urbs */
+ list_for_each (entry, &ed->td_list)
+ qlen++;
+ temp = scnprintf(next, size,
+ " (%cs dev%d ep%d%s qlen %u"
+ " max %d %08x%s%s)",
+ (info & ED_SPEED_FULL) ? 'f' : 'l',
+ ED_FA_GET(info),
+ ED_EN_GET(info),
+ (info & ED_ISO) ? "iso" : "int",
+ qlen,
+ ED_MPS_GET(info),
+ info,
+ (info & ED_SKIP) ? " K" : "",
+ (ed->hwHeadP &
+ cpu_to_hc32(ahcd, ED_H)) ?
+ " H" : "");
+ size -= temp;
+ next += temp;
+
+ if (seen_count < DBG_SCHED_LIMIT)
+ seen [seen_count++] = ed;
+
+ ed = ed->ed_next;
+
+ } else {
+ /* we've seen it and what's after */
+ temp = 0;
+ ed = NULL;
+ }
+
+ } while (ed);
+
+ temp = scnprintf(next, size, "\n");
+ size -= temp;
+ next += temp;
+ }
+ spin_unlock_irqrestore(&ahcd->lock, flags);
+ kfree (seen);
+
+ return PAGE_SIZE - size;
+}
+static CLASS_DEVICE_ATTR(periodic, S_IRUGO, show_periodic, NULL);
+
+
+#undef DBG_SCHED_LIMIT
+
static ssize_t
show_registers(struct class_device *class_dev, char *buf)
{
int retval;
retval = class_device_create_file(cldev, &class_device_attr_async);
+ retval = class_device_create_file(cldev, &class_device_attr_periodic);
retval = class_device_create_file(cldev, &class_device_attr_registers);
admhc_dbg(ahcd, "created debug files\n");
}
struct class_device *cldev = admhcd_to_hcd(ahcd)->self.class_dev;
class_device_remove_file(cldev, &class_device_attr_async);
+ class_device_remove_file(cldev, &class_device_attr_periodic);
class_device_remove_file(cldev, &class_device_attr_registers);
}
.hub_status_data = admhc_hub_status_data,
.hub_control = admhc_hub_control,
.hub_irq_enable = admhc_hub_irq_enable,
-#ifdef CONFIG_PM
+#ifdef CONFIG_PM
.bus_suspend = admhc_bus_suspend,
.bus_resume = admhc_bus_resume,
#endif
}
#ifdef CONFIG_PM
+/* TODO */
static int usb_hcd_adm5120_suspend(struct platform_device *dev)
{
struct usb_hcd *hcd = platform_get_drvdata(dev);
#include "../core/hcd.h"
#include "../core/hub.h"
-#define DRIVER_VERSION "v0.06"
+#define DRIVER_VERSION "v0.10"
#define DRIVER_AUTHOR "Gabor Juhos <juhosg at openwrt.org>"
#define DRIVER_DESC "ADMtek USB 1.1 Host Controller Driver"
#define ADMHC_INTR_INIT \
( ADMHC_INTR_MIE | ADMHC_INTR_INSM | ADMHC_INTR_FATI \
- | ADMHC_INTR_RESI | ADMHC_INTR_TDC | ADMHC_INTR_BABI \
- | ADMHC_INTR_7 | ADMHC_INTR_6 )
+ | ADMHC_INTR_RESI | ADMHC_INTR_TDC | ADMHC_INTR_BABI )
/*-------------------------------------------------------------------------*/
/* 1 TD for setup, 1 for ACK, plus ... */
td_cnt = 2;
- if (urb->transfer_buffer_length)
- td_cnt++;
- break;
+ /* FALLTHROUGH */
case PIPE_BULK:
/* one TD for every 4096 Bytes (can be upto 8K) */
- td_cnt = urb->transfer_buffer_length / TD_DATALEN_MAX;
+ td_cnt += urb->transfer_buffer_length / TD_DATALEN_MAX;
/* ... and for any remaining bytes ... */
if ((urb->transfer_buffer_length % TD_DATALEN_MAX) != 0)
td_cnt++;
return -ENOMEM;
urb_priv->ed = ed;
- urb_priv->urb = urb;
spin_lock_irqsave(&ahcd->lock, flags);
/* don't submit to a dead HC */
goto fail;
}
- if (ed->type == PIPE_ISOCHRONOUS) {
- if (ed->state == ED_NEW) {
+ /* schedule the ed if needed */
+ if (ed->state == ED_IDLE) {
+ ret = ed_schedule(ahcd, ed);
+ if (ret < 0)
+ goto fail0;
+
+ if (ed->type == PIPE_ISOCHRONOUS) {
u16 frame = admhc_frame_no(ahcd);
/* delay a few frames before the first TD */
/* yes, only URB_ISO_ASAP is supported, and
* urb->start_frame is never used as input.
*/
- } else
- urb->start_frame = ed->last_iso + ed->interval;
- }
+ }
+ } else if (ed->type == PIPE_ISOCHRONOUS)
+ urb->start_frame = ed->last_iso + ed->interval;
+ /* fill the TDs and link them to the ed; and
+ * enable that part of the schedule, if needed
+ * and update count of queued periodic urbs
+ */
urb->hcpriv = urb_priv;
- td_submit_urb(ahcd, urb_priv->urb);
-
- /* append it to the ED's queue */
- list_add_tail(&urb_priv->pending, &ed->urb_pending);
-
- /* schedule the ED */
- ret = ed_schedule(ahcd, ed);
+ td_submit_urb(ahcd, urb);
+#ifdef ADMHC_VERBOSE_DEBUG
+ admhc_dump_ed(ahcd, "admhc_urb_enqueue", urb_priv->ed, 1);
+#endif
+fail0:
spin_unlock(&urb->lock);
fail:
- if (ret) {
- urb_priv = urb->hcpriv;
+ if (ret)
urb_priv_free(ahcd, urb_priv);
- }
spin_unlock_irqrestore(&ahcd->lock, flags);
return ret;
static int admhc_urb_dequeue(struct usb_hcd *hcd, struct urb *urb)
{
struct admhcd *ahcd = hcd_to_admhcd(hcd);
- struct urb_priv *up;
unsigned long flags;
- up = urb->hcpriv;
- if (!up)
- return 0;
-
- spin_lock_irqsave(&ahcd->lock, flags);
-
#ifdef ADMHC_VERBOSE_DEBUG
- urb_print(ahcd, urb, "DEQEUE", 1);
+ urb_print(ahcd, urb, "DEQUEUE", 1);
#endif
+ spin_lock_irqsave(&ahcd->lock, flags);
if (HC_IS_RUNNING(hcd->state)) {
+ struct urb_priv *urb_priv;
+
/* Unless an IRQ completed the unlink while it was being
* handed to us, flag it for unlink and giveback, and force
* some upcoming INTR_SF to call finish_unlinks()
*/
- if (up->ed->urb_active != up) {
- list_del(&up->pending);
- finish_urb(ahcd, urb);
- } else {
- ed_start_deschedule(ahcd, up->ed);
+ urb_priv = urb->hcpriv;
+ if (urb_priv) {
+ if (urb_priv->ed->state == ED_OPER)
+ start_ed_unlink(ahcd, urb_priv->ed);
}
} else {
/*
* with HC dead, we won't respect hc queue pointers
* any more ... just clean up every urb's memory.
*/
- if (up->ed->urb_active != up) {
- list_del(&up->pending);
+ if (urb->hcpriv)
finish_urb(ahcd, urb);
- } else {
- finish_urb(ahcd, urb);
- up->ed->urb_active = NULL;
- up->ed->state = ED_IDLE;
- }
}
spin_unlock_irqrestore(&ahcd->lock, flags);
/* frees config/altsetting state for endpoints,
* including ED memory, dummy TD, and bulk/intr data toggle
*/
+
static void admhc_endpoint_disable(struct usb_hcd *hcd,
struct usb_host_endpoint *ep)
{
if (!HC_IS_RUNNING(hcd->state)) {
sanitize:
- ed->state = ED_UNLINK;
- admhc_finish_unlinks(ahcd, 0);
+ ed->state = ED_IDLE;
+ finish_unlinks(ahcd, 0);
}
switch (ed->state) {
spin_unlock_irqrestore(&ahcd->lock, flags);
schedule_timeout_uninterruptible(1);
goto rescan;
- case ED_IDLE:
- case ED_NEW: /* fully unlinked */
- if (list_empty(&ed->urb_pending)) {
- td_free(ahcd, ed->dummy);
- ed_free(ahcd, ed);
+ case ED_IDLE: /* fully unlinked */
+ if (list_empty(&ed->td_list)) {
+ td_free (ahcd, ed->dummy);
+ ed_free (ahcd, ed);
break;
}
/* else FALL THROUGH */
/* caller was supposed to have unlinked any requests;
* that's not our job. can't recover; must leak ed.
*/
- admhc_err(ahcd, "leak ed %p (#%02x) %s act %p%s\n",
- ed, ep->desc.bEndpointAddress,
- ed_statestring(ed->state),
- ed->urb_active,
- list_empty(&ed->urb_pending) ? "" : " (has urbs)");
+ admhc_err(ahcd, "leak ed %p (#%02x) state %d%s\n",
+ ed, ep->desc.bEndpointAddress, ed->state,
+ list_empty(&ed->td_list) ? "" : " (has tds)");
+ td_free(ahcd, ed->dummy);
break;
}
static void admhc_usb_reset(struct admhcd *ahcd)
{
- admhc_dbg(ahcd, "usb reset\n");
+#if 0
+ ahcd->hc_control = admhc_readl(ahcd, &ahcd->regs->control);
+ ahcd->hc_control &= OHCI_CTRL_RWC;
+ admhc_writel(ahcd, ahcd->hc_control, &ahcd->regs->control);
+#else
+ /* FIXME */
ahcd->host_control = ADMHC_BUSS_RESET;
- admhc_writel(ahcd, ahcd->host_control, &ahcd->regs->host_control);
+ admhc_writel(ahcd, ahcd->host_control ,&ahcd->regs->host_control);
+#endif
}
/* admhc_shutdown forcibly disables IRQs and DMA, helping kexec and
{
struct admhcd *ahcd;
- admhc_dbg(ahcd, "shutdown\n");
-
ahcd = hcd_to_admhcd(hcd);
admhc_intr_disable(ahcd, ADMHC_INTR_MIE);
admhc_dma_disable(ahcd);
admhc_usb_reset(ahcd);
+ /* flush the writes */
+ admhc_writel_flush(ahcd);
}
/*-------------------------------------------------------------------------*
ahcd->ed_head = NULL;
}
-#define ED_DUMMY_INFO 0
+#define ED_DUMMY_INFO (ED_SPEED_FULL | ED_SKIP)
static int admhc_eds_init(struct admhcd *ahcd)
{
/* also: power/overcurrent flags in rhdesc */
}
+#if 0 /* TODO: not applicable */
+ /* Reset USB nearly "by the book". RemoteWakeupConnected was
+ * saved if boot firmware (BIOS/SMM/...) told us it's connected,
+ * or if bus glue did the same (e.g. for PCI add-in cards with
+ * PCI PM support).
+ */
+ if ((ahcd->hc_control & OHCI_CTRL_RWC) != 0
+ && !device_may_wakeup(hcd->self.controller))
+ device_init_wakeup(hcd->self.controller, 1);
+#endif
+
switch (ahcd->host_control & ADMHC_HC_BUSS) {
case ADMHC_BUSS_OPER:
temp = 0;
break;
}
admhc_writel(ahcd, ahcd->host_control, &ahcd->regs->host_control);
- msleep(temp);
+ /* flush the writes */
+ admhc_writel_flush(ahcd);
+
+ msleep(temp);
temp = admhc_read_rhdesc(ahcd);
if (!(temp & ADMHC_RH_NPS)) {
/* power down each port */
for (temp = 0; temp < ahcd->num_ports; temp++)
admhc_write_portstatus(ahcd, temp, ADMHC_PS_CPP);
}
+ /* flush those writes */
+ admhc_writel_flush(ahcd);
/* 2msec timelimit here means no irqs/preempt */
spin_lock_irq(&ahcd->lock);
hcd->poll_rh = 1;
hcd->uses_new_polling = 1;
+#if 0
+ /* wake on ConnectStatusChange, matching external hubs */
+ admhc_writel(ahcd, RH_HS_DRWE, &ahcd->regs->roothub.status);
+#else
+ /* FIXME roothub_write_status (ahcd, ADMHC_RH_DRWE); */
+#endif
+
+ /* Choose the interrupts we care about now, others later on demand */
+ admhc_intr_ack(ahcd, ~0);
+ admhc_intr_enable(ahcd, ADMHC_INTR_INIT);
+
+ admhc_writel(ahcd, ADMHC_RH_NPS | ADMHC_RH_LPSC, &ahcd->regs->rhdesc);
+
+ /* flush those writes */
+ admhc_writel_flush(ahcd);
+
/* start controller operations */
ahcd->host_control = ADMHC_BUSS_OPER;
admhc_writel(ahcd, ahcd->host_control, &ahcd->regs->host_control);
- hcd->state = HC_STATE_RUNNING;
temp = 20;
while ((admhc_readl(ahcd, &ahcd->regs->host_control)
mdelay(1);
}
+ hcd->state = HC_STATE_RUNNING;
+
+ ahcd->next_statechange = jiffies + STATECHANGE_DELAY;
+
#if 0
- /* FIXME */
- /* wake on ConnectStatusChange, matching external hubs */
- admhc_writel(ahcd, ADMHC_RH_DRWE, &ahcd->regs->rhdesc);
-#endif
+ /* FIXME: enabling DMA is always failed here for an unknown reason */
+ admhc_dma_enable(ahcd);
- /* Choose the interrupts we care about now, others later on demand */
- temp = ADMHC_INTR_INIT;
- admhc_intr_ack(ahcd, ~0);
- admhc_intr_enable(ahcd, temp);
+ temp = 200;
+ while ((admhc_readl(ahcd, &ahcd->regs->host_control)
+ & ADMHC_HC_DMAE) != ADMHC_HC_DMAE) {
+ if (--temp == 0) {
+ spin_unlock_irq(&ahcd->lock);
+ admhc_err(ahcd, "unable to enable DMA!\n");
+ admhc_dump(ahcd, 1);
+ return -1;
+ }
+ mdelay(1);
+ }
- admhc_writel(ahcd, ADMHC_RH_NPS | ADMHC_RH_LPSC, &ahcd->regs->rhdesc);
+#endif
- ahcd->next_statechange = jiffies + STATECHANGE_DELAY;
spin_unlock_irq(&ahcd->lock);
mdelay(ADMHC_POTPGT);
- hcd->state = HC_STATE_RUNNING;
return 0;
}
u32 ints;
ints = admhc_readl(ahcd, ®s->int_status);
- if (!(ints & ADMHC_INTR_INTA)) {
+ if ((ints & ADMHC_INTR_INTA) == 0) {
/* no unmasked interrupt status is set */
- admhc_err(ahcd, "spurious interrupt %08x\n", ints);
return IRQ_NONE;
}
ints &= admhc_readl(ahcd, ®s->int_enable);
- if (!ints) {
- admhc_err(ahcd, "hardware irq problems?\n");
- return IRQ_NONE;
- }
-
- if (ints & ADMHC_INTR_6) {
- admhc_err(ahcd, "unknown interrupt 6\n");
- admhc_dump(ahcd, 0);
- }
-
- if (ints & ADMHC_INTR_7) {
- admhc_err(ahcd, "unknown interrupt 7\n");
- admhc_dump(ahcd, 0);
- }
if (ints & ADMHC_INTR_FATI) {
+ /* e.g. due to PCI Master/Target Abort */
admhc_disable(ahcd);
admhc_err(ahcd, "Fatal Error, controller disabled\n");
+ admhc_dump(ahcd, 1);
admhc_usb_reset(ahcd);
}
if (ints & ADMHC_INTR_BABI) {
- admhc_disable(ahcd);
+ admhc_intr_disable(ahcd, ADMHC_INTR_BABI);
+ admhc_intr_ack(ahcd, ADMHC_INTR_BABI);
admhc_err(ahcd, "Babble Detected\n");
- admhc_usb_reset(ahcd);
}
if (ints & ADMHC_INTR_INSM) {
if (ints & ADMHC_INTR_TDC) {
admhc_vdbg(ahcd, "Transfer Descriptor Complete\n");
+ admhc_intr_ack(ahcd, ADMHC_INTR_TDC);
if (HC_IS_RUNNING(hcd->state))
admhc_intr_disable(ahcd, ADMHC_INTR_TDC);
spin_lock(&ahcd->lock);
if (ints & ADMHC_INTR_SO) {
/* could track INTR_SO to reduce available PCI/... bandwidth */
- admhc_err(ahcd, "Schedule Overrun\n");
+ admhc_vdbg(ahcd, "Schedule Overrun\n");
}
+#if 1
+ spin_lock(&ahcd->lock);
+ if (ahcd->ed_rm_list)
+ finish_unlinks(ahcd, admhc_frame_no(ahcd));
+
+ if ((ints & ADMHC_INTR_SOFI) != 0 && !ahcd->ed_rm_list
+ && HC_IS_RUNNING(hcd->state))
+ admhc_intr_disable(ahcd, ADMHC_INTR_SOFI);
+ spin_unlock(&ahcd->lock);
+#else
if (ints & ADMHC_INTR_SOFI) {
+ admhc_vdbg(ahcd, "Start Of Frame\n");
spin_lock(&ahcd->lock);
+
/* handle any pending ED removes */
- admhc_finish_unlinks(ahcd, admhc_frame_no(ahcd));
+ finish_unlinks(ahcd, admhc_frameno(ahcd));
+
+ /* leaving INTR_SOFI enabled when there's still unlinking
+ * to be done in the (next frame).
+ */
+ if ((ahcd->ed_rm_list == NULL) ||
+ HC_IS_RUNNING(hcd->state) == 0)
+ /*
+ * disable INTR_SOFI if there are no unlinking to be
+ * done (in the next frame)
+ */
+ admhc_intr_disable(ahcd, ADMHC_INTR_SOFI);
+
spin_unlock(&ahcd->lock);
}
+#endif
if (HC_IS_RUNNING(hcd->state)) {
admhc_intr_ack(ahcd, ints);
admhc_intr_enable(ahcd, ADMHC_INTR_MIE);
+ admhc_writel_flush(ahcd);
}
return IRQ_HANDLED;
flush_scheduled_work();
admhc_usb_reset(ahcd);
- admhc_intr_disable(ahcd, ~0);
+ admhc_intr_disable(ahcd, ADMHC_INTR_MIE);
free_irq(hcd->irq, hcd);
hcd->irq = -1;
{
ahcd->next_statechange = jiffies;
spin_lock_init(&ahcd->lock);
+ INIT_LIST_HEAD(&ahcd->pending);
}
/*-------------------------------------------------------------------------*/
/*-------------------------------------------------------------------------*/
+/* ahcd "done list" processing needs this mapping */
+static inline struct td *dma_to_td(struct admhcd *ahcd, dma_addr_t td_dma)
+{
+ struct td *td;
+
+ td_dma &= TD_MASK;
+ td = ahcd->td_hash[TD_HASH_FUNC(td_dma)];
+ while (td && td->td_dma != td_dma)
+ td = td->td_hash;
+
+ return td;
+}
+
/* TDs ... */
static struct td *td_alloc(struct admhcd *ahcd, gfp_t mem_flags)
{
/* in case ahcd fetches it, make it look dead */
memset(td, 0, sizeof *td);
+ td->hwNextTD = cpu_to_hc32(ahcd, dma);
td->td_dma = dma;
+ /* hashed in td_fill */
return td;
}
static void td_free(struct admhcd *ahcd, struct td *td)
{
+ struct td **prev = &ahcd->td_hash[TD_HASH_FUNC(td->td_dma)];
+
+ while (*prev && *prev != td)
+ prev = &(*prev)->td_hash;
+ if (*prev)
+ *prev = td->td_hash;
+#if 0
+ /* TODO: remove */
+ else if ((td->hwINFO & cpu_to_hc32(ahcd, TD_DONE)) != 0)
+ admhc_dbg (ahcd, "no hash for td %p\n", td);
+#else
+ else if ((td->flags & TD_FLAG_DONE) != 0)
+ admhc_dbg (ahcd, "no hash for td %p\n", td);
+#endif
dma_pool_free(ahcd->td_cache, td, td->td_dma);
}
memset(ed, 0, sizeof(*ed));
ed->dma = dma;
- INIT_LIST_HEAD(&ed->urb_pending);
+ INIT_LIST_HEAD(&ed->td_list);
+ INIT_LIST_HEAD(&ed->urb_list);
return ed;
}
if (urb_priv->td[i])
td_free(ahcd, urb_priv->td[i]);
+ list_del(&urb_priv->pending);
kfree(urb_priv);
}
gfp_t mem_flags)
{
struct urb_priv *priv;
- int i;
/* allocate the private part of the URB */
priv = kzalloc(sizeof(*priv) + sizeof(struct td) * num_tds, mem_flags);
if (!priv)
goto err;
- /* allocate the TDs */
- for (i = 0; i < num_tds; i++) {
- priv->td[i] = td_alloc(ahcd, mem_flags);
- if (priv->td[i] == NULL)
+ /* allocate the TDs (deferring hash chain updates) */
+ for (priv->td_cnt = 0; priv->td_cnt < num_tds; priv->td_cnt++) {
+ priv->td[priv->td_cnt] = td_alloc(ahcd, mem_flags);
+ if (priv->td[priv->td_cnt] == NULL)
goto err_free;
- priv->td[i]->index = i;
}
INIT_LIST_HEAD(&priv->pending);
- priv->td_cnt = num_tds;
return priv;
&& urb->status == 0) {
urb->status = -EREMOTEIO;
#ifdef ADMHC_VERBOSE_DEBUG
- urb_print(ahcd, urb, "SHORT", usb_pipeout (urb->pipe));
+ urb_print(urb, "SHORT", usb_pipeout (urb->pipe));
#endif
}
spin_unlock(&urb->lock);
}
#ifdef ADMHC_VERBOSE_DEBUG
- urb_print(ahcd, urb, "FINISH", 0);
+ urb_print(urb, "RET", usb_pipeout (urb->pipe));
#endif
/* urb->complete() can reenter this HCD */
* ED handling functions
*-------------------------------------------------------------------------*/
+#if 0 /* FIXME */
+/* search for the right schedule branch to use for a periodic ed.
+ * does some load balancing; returns the branch, or negative errno.
+ */
+static int balance(struct admhcd *ahcd, int interval, int load)
+{
+ int i, branch = -ENOSPC;
+
+ /* iso periods can be huge; iso tds specify frame numbers */
+ if (interval > NUM_INTS)
+ interval = NUM_INTS;
+
+ /* search for the least loaded schedule branch of that period
+ * that has enough bandwidth left unreserved.
+ */
+ for (i = 0; i < interval ; i++) {
+ if (branch < 0 || ahcd->load [branch] > ahcd->load [i]) {
+ int j;
+
+ /* usb 1.1 says 90% of one frame */
+ for (j = i; j < NUM_INTS; j += interval) {
+ if ((ahcd->load [j] + load) > 900)
+ break;
+ }
+ if (j < NUM_INTS)
+ continue;
+ branch = i;
+ }
+ }
+ return branch;
+}
+#endif
+
+/*-------------------------------------------------------------------------*/
+
+#if 0 /* FIXME */
+/* both iso and interrupt requests have periods; this routine puts them
+ * into the schedule tree in the apppropriate place. most iso devices use
+ * 1msec periods, but that's not required.
+ */
+static void periodic_link (struct admhcd *ahcd, struct ed *ed)
+{
+ unsigned i;
+
+ admhc_vdbg (ahcd, "link %sed %p branch %d [%dus.], interval %d\n",
+ (ed->hwINFO & cpu_to_hc32 (ahcd, ED_ISO)) ? "iso " : "",
+ ed, ed->branch, ed->load, ed->interval);
+
+ for (i = ed->branch; i < NUM_INTS; i += ed->interval) {
+ struct ed **prev = &ahcd->periodic [i];
+ __hc32 *prev_p = &ahcd->hcca->int_table [i];
+ struct ed *here = *prev;
+
+ /* sorting each branch by period (slow before fast)
+ * lets us share the faster parts of the tree.
+ * (plus maybe: put interrupt eds before iso)
+ */
+ while (here && ed != here) {
+ if (ed->interval > here->interval)
+ break;
+ prev = &here->ed_next;
+ prev_p = &here->hwNextED;
+ here = *prev;
+ }
+ if (ed != here) {
+ ed->ed_next = here;
+ if (here)
+ ed->hwNextED = *prev_p;
+ wmb ();
+ *prev = ed;
+ *prev_p = cpu_to_hc32(ahcd, ed->dma);
+ wmb();
+ }
+ ahcd->load [i] += ed->load;
+ }
+ admhcd_to_hcd(ahcd)->self.bandwidth_allocated += ed->load / ed->interval;
+}
+#endif
+
+/* link an ed into the HC chain */
+
+static int ed_schedule(struct admhcd *ahcd, struct ed *ed)
+{
+ struct ed *old_tail;
+
+ if (admhcd_to_hcd(ahcd)->state == HC_STATE_QUIESCING)
+ return -EAGAIN;
+
+ ed->state = ED_OPER;
+
+ old_tail = ahcd->ed_tails[ed->type];
+
+ ed->ed_next = old_tail->ed_next;
+ if (ed->ed_next) {
+ ed->ed_next->ed_prev = ed;
+ ed->hwNextED = cpu_to_hc32(ahcd, ed->ed_next->dma);
+ }
+ ed->ed_prev = old_tail;
+
+ old_tail->ed_next = ed;
+ old_tail->hwNextED = cpu_to_hc32(ahcd, ed->dma);
+
+ ahcd->ed_tails[ed->type] = ed;
+
+ admhc_dma_enable(ahcd);
+
+ return 0;
+}
+
+/*-------------------------------------------------------------------------*/
+
+#if 0 /* FIXME */
+/* scan the periodic table to find and unlink this ED */
+static void periodic_unlink (struct admhcd *ahcd, struct ed *ed)
+{
+ int i;
+
+ for (i = ed->branch; i < NUM_INTS; i += ed->interval) {
+ struct ed *temp;
+ struct ed **prev = &ahcd->periodic [i];
+ __hc32 *prev_p = &ahcd->hcca->int_table [i];
+
+ while (*prev && (temp = *prev) != ed) {
+ prev_p = &temp->hwNextED;
+ prev = &temp->ed_next;
+ }
+ if (*prev) {
+ *prev_p = ed->hwNextED;
+ *prev = ed->ed_next;
+ }
+ ahcd->load [i] -= ed->load;
+ }
+
+ admhcd_to_hcd(ahcd)->self.bandwidth_allocated -= ed->load / ed->interval;
+ admhc_vdbg (ahcd, "unlink %sed %p branch %d [%dus.], interval %d\n",
+ (ed->hwINFO & cpu_to_hc32 (ahcd, ED_ISO)) ? "iso " : "",
+ ed, ed->branch, ed->load, ed->interval);
+}
+#endif
+
+/* unlink an ed from the HC chain.
+ * just the link to the ed is unlinked.
+ * the link from the ed still points to another operational ed or 0
+ * so the HC can eventually finish the processing of the unlinked ed
+ * (assuming it already started that, which needn't be true).
+ *
+ * ED_UNLINK is a transient state: the HC may still see this ED, but soon
+ * it won't. ED_SKIP means the HC will finish its current transaction,
+ * but won't start anything new. The TD queue may still grow; device
+ * drivers don't know about this HCD-internal state.
+ *
+ * When the HC can't see the ED, something changes ED_UNLINK to one of:
+ *
+ * - ED_OPER: when there's any request queued, the ED gets rescheduled
+ * immediately. HC should be working on them.
+ *
+ * - ED_IDLE: when there's no TD queue. there's no reason for the HC
+ * to care about this ED; safe to disable the endpoint.
+ *
+ * When finish_unlinks() runs later, after SOF interrupt, it will often
+ * complete one or more URB unlinks before making that state change.
+ */
+static void ed_deschedule(struct admhcd *ahcd, struct ed *ed)
+{
+ ed->hwINFO |= cpu_to_hc32(ahcd, ED_SKIP);
+ wmb();
+ ed->state = ED_UNLINK;
+
+ /* remove this ED from the HC list */
+ ed->ed_prev->hwNextED = ed->hwNextED;
+
+ /* and remove it from our list also */
+ ed->ed_prev->ed_next = ed->ed_next;
+
+ if (ed->ed_next)
+ ed->ed_next->ed_prev = ed->ed_prev;
+
+ if (ahcd->ed_tails[ed->type] == ed)
+ ahcd->ed_tails[ed->type] = ed->ed_prev;
+}
+
+/*-------------------------------------------------------------------------*/
+
static struct ed *ed_create(struct admhcd *ahcd, unsigned int type, u32 info)
{
struct ed *ed;
break;
}
- info |= ED_SKIP;
-
ed->dummy = td;
- ed->state = ED_NEW;
+ ed->state = ED_IDLE;
ed->type = type;
ed->hwINFO = cpu_to_hc32(ahcd, info);
ed->hwTailP = cpu_to_hc32(ahcd, td->td_dma);
- ed->hwHeadP = cpu_to_hc32(ahcd, td->td_dma);
+ ed->hwHeadP = ed->hwTailP; /* ED_C, ED_H zeroed */
return ed;
static struct ed *ed_get(struct admhcd *ahcd, struct usb_host_endpoint *ep,
struct usb_device *udev, unsigned int pipe, int interval)
{
- struct ed *ed;
+ struct ed *ed;
+ unsigned long flags;
+
+ spin_lock_irqsave(&ahcd->lock, flags);
ed = ep->hcpriv;
if (!ed) {
ep->hcpriv = ed;
}
- return ed;
-}
-
-static void ed_next_urb(struct admhcd *ahcd, struct ed *ed)
-{
- struct urb_priv *up;
- u32 carry;
-
- up = list_entry(ed->urb_pending.next, struct urb_priv, pending);
- list_del(&up->pending);
-
- ed->urb_active = up;
- ed->state = ED_OPER;
-
-#ifdef ADMHC_VERBOSE_DEBUG
- urb_print(ahcd, up->urb, "NEXT", 0);
- admhc_dump_ed(ahcd, " ", ed, 0);
-#endif
-
- up->td[up->td_cnt-1]->hwNextTD = cpu_to_hc32(ahcd, ed->dummy->td_dma);
+ spin_unlock_irqrestore(&ahcd->lock, flags);
- carry = hc32_to_cpup(ahcd, &ed->hwHeadP) & ED_C;
- ed->hwHeadP = cpu_to_hc32(ahcd, up->td[0]->td_dma | carry);
- ed->hwINFO &= ~cpu_to_hc32(ahcd, ED_SKIP);
-}
-
-/* link an ed into the HC chain */
-static int ed_schedule(struct admhcd *ahcd, struct ed *ed)
-{
- struct ed *old_tail;
-
- if (admhcd_to_hcd(ahcd)->state == HC_STATE_QUIESCING)
- return -EAGAIN;
-
- if (ed->state == ED_NEW) {
- ed->state = ED_IDLE;
-
- old_tail = ahcd->ed_tails[ed->type];
-
- ed->ed_next = old_tail->ed_next;
- if (ed->ed_next) {
- ed->ed_next->ed_prev = ed;
- ed->hwNextED = cpu_to_hc32(ahcd, ed->ed_next->dma);
- }
- ed->ed_prev = old_tail;
-
- old_tail->ed_next = ed;
- old_tail->hwNextED = cpu_to_hc32(ahcd, ed->dma);
-
- ahcd->ed_tails[ed->type] = ed;
- ed->hwINFO &= ~cpu_to_hc32(ahcd, ED_SKIP);
- }
-
-#ifdef ADMHC_VERBOSE_DEBUG
- admhc_dump_ed(ahcd, "ED-SCHED", ed, 0);
-#endif
-
- if (!ed->urb_active) {
- ed_next_urb(ahcd, ed);
- admhc_dma_enable(ahcd);
- }
-
- return 0;
+ return ed;
}
-static void ed_deschedule(struct admhcd *ahcd, struct ed *ed)
-{
-
-#ifdef ADMHC_VERBOSE_DEBUG
- admhc_dump_ed(ahcd, "ED-DESCHED", ed, 0);
-#endif
-
- /* remove this ED from the HC list */
- ed->ed_prev->hwNextED = ed->hwNextED;
-
- /* and remove it from our list */
- ed->ed_prev->ed_next = ed->ed_next;
-
- if (ed->ed_next) {
- ed->ed_next->ed_prev = ed->ed_prev;
- ed->ed_next = NULL;
- }
-
- if (ahcd->ed_tails[ed->type] == ed)
- ahcd->ed_tails[ed->type] = ed->ed_prev;
-
- ed->state = ED_NEW;
-}
+/*-------------------------------------------------------------------------*/
-static void ed_start_deschedule(struct admhcd *ahcd, struct ed *ed)
+/* request unlinking of an endpoint from an operational HC.
+ * put the ep on the rm_list
+ * real work is done at the next start frame (SOFI) hardware interrupt
+ * caller guarantees HCD is running, so hardware access is safe,
+ * and that ed->state is ED_OPER
+ */
+static void start_ed_unlink(struct admhcd *ahcd, struct ed *ed)
{
+ ed->hwINFO |= cpu_to_hc32 (ahcd, ED_DEQUEUE);
+ ed_deschedule(ahcd, ed);
-#ifdef ADMHC_VERBOSE_DEBUG
- admhc_dump_ed(ahcd, "ED-UNLINK", ed, 0);
-#endif
+ /* add this ED into the remove list */
+ ed->ed_rm_next = ahcd->ed_rm_list;
+ ahcd->ed_rm_list = ed;
- ed->hwINFO |= cpu_to_hc32(ahcd, ED_SKIP);
- ed->state = ED_UNLINK;
+ /* enable SOF interrupt */
+ admhc_intr_ack(ahcd, ADMHC_INTR_SOFI);
+ admhc_intr_enable(ahcd, ADMHC_INTR_SOFI);
+ /* flush those writes */
+ admhc_writel_flush(ahcd);
/* SOF interrupt might get delayed; record the frame counter value that
* indicates when the HC isn't looking at it, so concurrent unlinks
* SOF is triggered.
*/
ed->tick = admhc_frame_no(ahcd) + 1;
-
- admhc_intr_enable(ahcd, ADMHC_INTR_SOFI);
}
/*-------------------------------------------------------------------------*
* TD handling functions
*-------------------------------------------------------------------------*/
-static void td_fill(struct admhcd *ahcd, u32 info, dma_addr_t data, int len,
- struct urb_priv *up)
+/* enqueue next TD for this URB (OHCI spec 5.2.8.2) */
+
+static void
+td_fill(struct admhcd *ahcd, u32 info, dma_addr_t data, int len,
+ struct urb *urb, int index)
{
- struct td *td;
- u32 cbl = 0;
+ struct td *td, *td_pt;
+ struct urb_priv *urb_priv = urb->hcpriv;
+ int hash;
+ u32 cbl = 0;
+
+#if 1
+ if (index == (urb_priv->td_cnt - 1) &&
+ ((urb->transfer_flags & URB_NO_INTERRUPT) == 0))
+ cbl |= TD_IE;
+#else
+ if (index == (urb_priv->td_cnt - 1))
+ cbl |= TD_IE;
+#endif
- if (up->td_idx >= up->td_cnt) {
- admhc_err(ahcd, "td_fill error, idx=%d, cnt=%d\n", up->td_idx,
- up->td_cnt);
- BUG();
- }
+ /* use this td as the next dummy */
+ td_pt = urb_priv->td[index];
- td = up->td[up->td_idx];
+ /* fill the old dummy TD */
+ td = urb_priv->td[index] = urb_priv->ed->dummy;
+ urb_priv->ed->dummy = td_pt;
+
+ td->ed = urb_priv->ed;
+ td->next_dl_td = NULL;
+ td->index = index;
+ td->urb = urb;
td->data_dma = data;
if (!len)
data = 0;
- if (up->td_idx == up->td_cnt-1)
- cbl |= TD_IE;
-
if (data)
cbl |= (len & TD_BL_MASK);
td->hwINFO = cpu_to_hc32(ahcd, info);
td->hwDBP = cpu_to_hc32(ahcd, data);
td->hwCBL = cpu_to_hc32(ahcd, cbl);
+ td->hwNextTD = cpu_to_hc32(ahcd, td_pt->td_dma);
+
+ /* append to queue */
+ list_add_tail(&td->td_list, &td->ed->td_list);
- if (up->td_idx > 0)
- up->td[up->td_idx-1]->hwNextTD = cpu_to_hc32(ahcd, td->td_dma);
+ /* hash it for later reverse mapping */
+ hash = TD_HASH_FUNC(td->td_dma);
+ td->td_hash = ahcd->td_hash[hash];
+ ahcd->td_hash[hash] = td;
- up->td_idx++;
+ /* HC might read the TD (or cachelines) right away ... */
+ wmb();
+ td->ed->hwTailP = td->hwNextTD;
}
/*-------------------------------------------------------------------------*/
int cnt = 0;
u32 info = 0;
int is_out = usb_pipeout(urb->pipe);
+ int periodic = 0;
u32 toggle = 0;
+ struct td *td;
/* OHCI handles the bulk/interrupt data toggles itself. We just
* use the device toggle bits for resetting, and rely on the fact
}
urb_priv->td_idx = 0;
+ list_add(&urb_priv->pending, &ahcd->pending);
if (data_len)
data = urb->transfer_dma;
info |= (urb->start_frame & TD_FN_MASK);
info |= (urb->interval & TD_ISI_MASK) << TD_ISI_SHIFT;
- td_fill(ahcd, info, data, data_len, urb_priv);
+ td_fill(ahcd, info, data, data_len, urb, cnt);
cnt++;
admhcd_to_hcd(ahcd)->self.bandwidth_int_reqs++;
/* TDs _could_ transfer up to 8K each */
while (data_len > TD_DATALEN_MAX) {
td_fill(ahcd, info | ((cnt) ? TD_T_CARRY : toggle),
- data, TD_DATALEN_MAX, urb_priv);
+ data, TD_DATALEN_MAX, urb, cnt);
data += TD_DATALEN_MAX;
data_len -= TD_DATALEN_MAX;
cnt++;
}
td_fill(ahcd, info | ((cnt) ? TD_T_CARRY : toggle), data,
- data_len, urb_priv);
+ data_len, urb, cnt);
cnt++;
if ((urb->transfer_flags & URB_ZERO_PACKET)
&& (cnt < urb_priv->td_cnt)) {
td_fill(ahcd, info | ((cnt) ? TD_T_CARRY : toggle),
- 0, 0, urb_priv);
+ 0, 0, urb, cnt);
cnt++;
}
break;
case PIPE_CONTROL:
/* fill a TD for the setup */
info = TD_SCC_NOTACCESSED | TD_DP_SETUP | TD_T_DATA0;
- td_fill(ahcd, info, urb->setup_dma, 8, urb_priv);
- cnt++;
+ td_fill(ahcd, info, urb->setup_dma, 8, urb, cnt++);
if (data_len > 0) {
/* fill a TD for the data */
info = TD_SCC_NOTACCESSED | TD_T_DATA1;
info |= is_out ? TD_DP_OUT : TD_DP_IN;
/* NOTE: mishandles transfers >8K, some >4K */
- td_fill(ahcd, info, data, data_len, urb_priv);
- cnt++;
+ td_fill(ahcd, info, data, data_len, urb, cnt++);
}
/* fill a TD for the ACK */
info = (is_out || data_len == 0)
? TD_SCC_NOTACCESSED | TD_DP_IN | TD_T_DATA1
: TD_SCC_NOTACCESSED | TD_DP_OUT | TD_T_DATA1;
- td_fill(ahcd, info, data, 0, urb_priv);
- cnt++;
+ td_fill(ahcd, info, data, 0, urb, cnt++);
break;
frame &= TD_FN_MASK;
td_fill(ahcd, info | frame,
data + urb->iso_frame_desc[cnt].offset,
- urb->iso_frame_desc[cnt].length,
- urb_priv);
+ urb->iso_frame_desc[cnt].length, urb, cnt);
}
admhcd_to_hcd(ahcd)->self.bandwidth_isoc_reqs++;
break;
if (urb_priv->td_cnt != cnt)
admhc_err(ahcd, "bad number of tds created for urb %p\n", urb);
-
- urb_priv->td_idx = 0;
}
+/*-------------------------------------------------------------------------*
+ * Done List handling functions
+ *-------------------------------------------------------------------------*/
+
/* calculate transfer length/status and update the urb
* PRECONDITION: irqsafe (only for urb->status locking)
*/
static int td_done(struct admhcd *ahcd, struct urb *urb, struct td *td)
{
+ struct urb_priv *urb_priv = urb->hcpriv;
u32 info = hc32_to_cpup(ahcd, &td->hwINFO);
- u32 dbp = hc32_to_cpup(ahcd, &td->hwDBP);
- u32 cbl = TD_BL_GET(hc32_to_cpup(ahcd, &td->hwCBL));
int type = usb_pipetype(urb->pipe);
int cc;
return;
if (usb_pipeout (urb->pipe))
- dlen = urb->iso_frame_desc[td->index].length;
+ dlen = urb->iso_frame_desc [td->index].length;
else {
/* short reads are always OK for ISO */
if (cc == TD_DATAUNDERRUN)
cc = TD_CC_NOERROR;
dlen = tdPSW & 0x3ff;
}
-
urb->actual_length += dlen;
- urb->iso_frame_desc[td->index].actual_length = dlen;
- urb->iso_frame_desc[td->index].status = cc_to_error[cc];
+ urb->iso_frame_desc [td->index].actual_length = dlen;
+ urb->iso_frame_desc [td->index].status = cc_to_error [cc];
if (cc != TD_CC_NOERROR)
admhc_vdbg (ahcd,
* might not be reported as errors.
*/
} else {
-
-#ifdef ADMHC_VERBOSE_DEBUG
- admhc_dump_td(ahcd, "td_done", td);
-#endif
+ u32 bl = TD_BL_GET(hc32_to_cpup(ahcd, &td->hwCBL));
+ u32 tdDBP = hc32_to_cpup(ahcd, &td->hwDBP);
+
+ /* update packet status if needed (short is normally ok) */
+ if (cc == TD_CC_DATAUNDERRUN
+ && !(urb->transfer_flags & URB_SHORT_NOT_OK))
+ cc = TD_CC_NOERROR;
+
+ if (cc != TD_CC_NOERROR && cc < TD_CC_HCD0) {
+ spin_lock(&urb->lock);
+ if (urb->status == -EINPROGRESS)
+ urb->status = cc_to_error[cc];
+ spin_unlock(&urb->lock);
+ }
/* count all non-empty packets except control SETUP packet */
- if ((type != PIPE_CONTROL || td->index != 0) && dbp != 0) {
- urb->actual_length += dbp - td->data_dma + cbl;
+ if ((type != PIPE_CONTROL || td->index != 0) && tdDBP != 0) {
+ urb->actual_length += tdDBP - td->data_dma + bl;
}
+
+ if (cc != TD_CC_NOERROR && cc < TD_CC_HCD0)
+ admhc_vdbg(ahcd,
+ "urb %p td %p (%d) cc %d, len=%d/%d\n",
+ urb, td, td->index, cc,
+ urb->actual_length,
+ urb->transfer_buffer_length);
}
+ list_del(&td->td_list);
+ urb_priv->td_idx++;
+
return cc;
}
/*-------------------------------------------------------------------------*/
-static void ed_update(struct admhcd *ahcd, struct ed *ed, int force)
+static inline struct td *
+ed_halted(struct admhcd *ahcd, struct td *td, int cc, struct td *rev)
{
- struct urb_priv *up;
- struct urb *urb;
- int cc;
+ struct urb *urb = td->urb;
+ struct ed *ed = td->ed;
+ struct list_head *tmp = td->td_list.next;
+ __hc32 toggle = ed->hwHeadP & cpu_to_hc32 (ahcd, ED_C);
+
+ admhc_dump_ed(ahcd, "ed halted", td->ed, 1);
+ /* clear ed halt; this is the td that caused it, but keep it inactive
+ * until its urb->complete() has a chance to clean up.
+ */
+ ed->hwINFO |= cpu_to_hc32 (ahcd, ED_SKIP);
+ wmb();
+ ed->hwHeadP &= ~cpu_to_hc32 (ahcd, ED_H);
- up = ed->urb_active;
- if (!up)
- return;
+ /* put any later tds from this urb onto the donelist, after 'td',
+ * order won't matter here: no errors, and nothing was transferred.
+ * also patch the ed so it looks as if those tds completed normally.
+ */
+ while (tmp != &ed->td_list) {
+ struct td *next;
+ __hc32 info;
- urb = up->urb;
+ next = list_entry(tmp, struct td, td_list);
+ tmp = next->td_list.next;
-#ifdef ADMHC_VERBOSE_DEBUG
- urb_print(ahcd, urb, "UPDATE", 0);
- admhc_dump_ed(ahcd, "ED-UPDATE", ed, 1);
+ if (next->urb != urb)
+ break;
+
+ /* NOTE: if multi-td control DATA segments get supported,
+ * this urb had one of them, this td wasn't the last td
+ * in that segment (TD_R clear), this ed halted because
+ * of a short read, _and_ URB_SHORT_NOT_OK is clear ...
+ * then we need to leave the control STATUS packet queued
+ * and clear ED_SKIP.
+ */
+ info = next->hwINFO;
+#if 0 /* FIXME */
+ info |= cpu_to_hc32 (ahcd, TD_DONE);
#endif
+ info &= ~cpu_to_hc32 (ahcd, TD_CC);
+ next->hwINFO = info;
- cc = TD_CC_NOERROR;
- for (; up->td_idx < up->td_cnt; up->td_idx++) {
- struct td *td = up->td[up->td_idx];
+ next->next_dl_td = rev;
+ rev = next;
- if (hc32_to_cpup(ahcd, &td->hwINFO) & TD_OWN)
+ ed->hwHeadP = next->hwNextTD | toggle;
+ }
+
+ /* help for troubleshooting: report anything that
+ * looks odd ... that doesn't include protocol stalls
+ * (or maybe some other things)
+ */
+ switch (cc) {
+ case TD_CC_DATAUNDERRUN:
+ if ((urb->transfer_flags & URB_SHORT_NOT_OK) == 0)
break;
+ /* fallthrough */
+ case TD_CC_STALL:
+ if (usb_pipecontrol(urb->pipe))
+ break;
+ /* fallthrough */
+ default:
+ admhc_dbg (ahcd,
+ "urb %p path %s ep%d%s %08x cc %d --> status %d\n",
+ urb, urb->dev->devpath,
+ usb_pipeendpoint (urb->pipe),
+ usb_pipein (urb->pipe) ? "in" : "out",
+ hc32_to_cpu(ahcd, td->hwINFO),
+ cc, cc_to_error [cc]);
+ }
- cc = td_done(ahcd, urb, td);
- if (cc != TD_CC_NOERROR) {
- admhc_vdbg(ahcd,
- "urb %p td %p (%d) cc %d, len=%d/%d\n",
- urb, td, td->index, cc,
- urb->actual_length,
- urb->transfer_buffer_length);
+ return rev;
+}
- up->td_idx = up->td_cnt;
- break;
+/*-------------------------------------------------------------------------*/
+
+/* there are some urbs/eds to unlink; called in_irq(), with HCD locked */
+static void
+finish_unlinks(struct admhcd *ahcd, u16 tick)
+{
+ struct ed *ed, **last;
+
+rescan_all:
+ for (last = &ahcd->ed_rm_list, ed = *last; ed != NULL; ed = *last) {
+ struct list_head *entry, *tmp;
+ int completed, modified;
+ __hc32 *prev;
+
+ /* only take off EDs that the HC isn't using, accounting for
+ * frame counter wraps and EDs with partially retired TDs
+ */
+ if (likely(HC_IS_RUNNING(admhcd_to_hcd(ahcd)->state))) {
+ if (tick_before (tick, ed->tick)) {
+skip_ed:
+ last = &ed->ed_rm_next;
+ continue;
+ }
+
+ if (!list_empty (&ed->td_list)) {
+ struct td *td;
+ u32 head;
+
+ td = list_entry(ed->td_list.next, struct td,
+ td_list);
+ head = hc32_to_cpu(ahcd, ed->hwHeadP) &
+ TD_MASK;
+
+ /* INTR_WDH may need to clean up first */
+ if (td->td_dma != head)
+ goto skip_ed;
+ }
}
- }
- if ((up->td_idx != up->td_cnt) && (!force))
- /* the URB is not completed yet */
- return;
+ /* reentrancy: if we drop the schedule lock, someone might
+ * have modified this list. normally it's just prepending
+ * entries (which we'd ignore), but paranoia won't hurt.
+ */
+ *last = ed->ed_rm_next;
+ ed->ed_rm_next = NULL;
+ modified = 0;
+
+ /* unlink urbs as requested, but rescan the list after
+ * we call a completion since it might have unlinked
+ * another (earlier) urb
+ *
+ * When we get here, the HC doesn't see this ed. But it
+ * must not be rescheduled until all completed URBs have
+ * been given back to the driver.
+ */
+rescan_this:
+ completed = 0;
+ prev = &ed->hwHeadP;
+ list_for_each_safe (entry, tmp, &ed->td_list) {
+ struct td *td;
+ struct urb *urb;
+ struct urb_priv *urb_priv;
+ __hc32 savebits;
+
+ td = list_entry(entry, struct td, td_list);
+ urb = td->urb;
+ urb_priv = td->urb->hcpriv;
+
+ if (urb->status == -EINPROGRESS) {
+ prev = &td->hwNextTD;
+ continue;
+ }
+
+ if ((urb_priv) == NULL)
+ continue;
- /* update packet status if needed (short is normally ok) */
- if (cc == TD_CC_DATAUNDERRUN
- && !(urb->transfer_flags & URB_SHORT_NOT_OK))
- cc = TD_CC_NOERROR;
+ /* patch pointer hc uses */
+ savebits = *prev & ~cpu_to_hc32(ahcd, TD_MASK);
+ *prev = td->hwNextTD | savebits;
- if (cc != TD_CC_NOERROR && cc < TD_CC_HCD0) {
- spin_lock(&urb->lock);
- if (urb->status == -EINPROGRESS)
- urb->status = cc_to_error[cc];
- spin_unlock(&urb->lock);
- }
+ /* HC may have partly processed this TD */
+ urb_print(urb, "PARTIAL", 1);
+ td_done(ahcd, urb, td);
- finish_urb(ahcd, urb);
+ /* if URB is done, clean up */
+ if (urb_priv->td_idx == urb_priv->td_cnt) {
+ modified = completed = 1;
+ finish_urb(ahcd, urb);
+ }
+ }
+ if (completed && !list_empty (&ed->td_list))
+ goto rescan_this;
- ed->urb_active = NULL;
- ed->state = ED_IDLE;
+ /* ED's now officially unlinked, hc doesn't see */
+ ed->state = ED_IDLE;
+ ed->hwHeadP &= ~cpu_to_hc32(ahcd, ED_H);
+ ed->hwNextED = 0;
+ wmb ();
+ ed->hwINFO &= ~cpu_to_hc32 (ahcd, ED_SKIP | ED_DEQUEUE);
+
+ /* but if there's work queued, reschedule */
+ if (!list_empty (&ed->td_list)) {
+ if (HC_IS_RUNNING(admhcd_to_hcd(ahcd)->state))
+ ed_schedule(ahcd, ed);
+ }
+
+ if (modified)
+ goto rescan_all;
+ }
}
-/* there are some tds completed; called in_irq(), with HCD locked */
-static void admhc_td_complete(struct admhcd *ahcd)
+/*-------------------------------------------------------------------------*/
+
+/*
+ * Process normal completions (error or success) and clean the schedules.
+ *
+ * This is the main path for handing urbs back to drivers. The only other
+ * path is finish_unlinks(), which unlinks URBs using ed_rm_list, instead of
+ * scanning the (re-reversed) donelist as this does.
+ */
+
+static void ed_unhalt(struct admhcd *ahcd, struct ed *ed, struct urb *urb)
{
- struct ed *ed;
- int more = 0;
+ struct list_head *entry,*tmp;
+ struct urb_priv *urb_priv = urb->hcpriv;
+ __hc32 toggle = ed->hwHeadP & cpu_to_hc32 (ahcd, ED_C);
- for (ed = ahcd->ed_head; ed; ed = ed->ed_next) {
- if (ed->state != ED_OPER)
- continue;
- if (hc32_to_cpup(ahcd, &ed->hwHeadP) & ED_H) {
- admhc_dump_ed(ahcd, "ed halted", ed, 1);
- ed_update(ahcd, ed, 1);
- ed->hwHeadP &= ~cpu_to_hc32(ahcd, ED_H);
- } else
- ed_update(ahcd, ed, 0);
+#ifdef ADMHC_VERBOSE_DEBUG
+ admhc_dump_ed(ahcd, "UNHALT", ed, 0);
+#endif
+ /* clear ed halt; this is the td that caused it, but keep it inactive
+ * until its urb->complete() has a chance to clean up.
+ */
+ ed->hwINFO |= cpu_to_hc32 (ahcd, ED_SKIP);
+ wmb();
+ ed->hwHeadP &= ~cpu_to_hc32 (ahcd, ED_H);
- if (ed->urb_active) {
- more = 1;
- continue;
- }
+ list_for_each_safe(entry, tmp, &ed->td_list) {
+ struct td *td = list_entry(entry, struct td, td_list);
+ __hc32 info;
- if (!(list_empty(&ed->urb_pending))) {
- more = 1;
- ed_next_urb(ahcd, ed);
- continue;
- }
+ if (td->urb != urb)
+ break;
- ed_start_deschedule(ahcd, ed);
+ info = td->hwINFO;
+ info &= ~cpu_to_hc32(ahcd, TD_CC | TD_OWN);
+ td->hwINFO = info;
+
+ ed->hwHeadP = td->hwNextTD | toggle;
+ wmb();
}
- if (!more)
- admhc_dma_disable(ahcd);
+}
+static inline int is_ed_halted(struct admhcd *ahcd, struct ed *ed)
+{
+ return ((hc32_to_cpup(ahcd, &ed->hwHeadP) & ED_H) == ED_H);
}
-/* there are some urbs/eds to unlink; called in_irq(), with HCD locked */
-static void admhc_finish_unlinks(struct admhcd *ahcd, u16 tick)
+static inline int is_td_halted(struct admhcd *ahcd, struct ed *ed,
+ struct td *td)
{
- struct ed *ed;
- int more = 0;
+ return ((hc32_to_cpup(ahcd, &ed->hwHeadP) & TD_MASK) ==
+ (hc32_to_cpup(ahcd, &td->hwNextTD) & TD_MASK));
+}
- for (ed = ahcd->ed_head; ed; ed = ed->ed_next) {
- if (ed->state != ED_UNLINK)
- continue;
+static void ed_update(struct admhcd *ahcd, struct ed *ed)
+{
+ struct list_head *entry,*tmp;
- if (likely(HC_IS_RUNNING(admhcd_to_hcd(ahcd)->state)))
- if (tick_before(tick, ed->tick)) {
- more = 1;
- continue;
- }
+#ifdef ADMHC_VERBOSE_DEBUG
+ admhc_dump_ed(ahcd, "UPDATE", ed, 0);
+#endif
- /* process partial status */
- if (ed->urb_active)
- ed_update(ahcd, ed, 1);
+ list_for_each_safe(entry, tmp, &ed->td_list) {
+ struct td *td = list_entry(entry, struct td, td_list);
+ struct urb *urb = td->urb;
+ struct urb_priv *urb_priv = urb->hcpriv;
+ int cc;
+
+ if (hc32_to_cpup(ahcd, &td->hwINFO) & TD_OWN)
+ break;
+
+ /* update URB's length and status from TD */
+ cc = td_done(ahcd, urb, td);
+ if (is_ed_halted(ahcd, ed) && is_td_halted(ahcd, ed, td))
+ ed_unhalt(ahcd, ed, urb);
+
+ /* If all this urb's TDs are done, call complete() */
+ if (urb_priv->td_idx == urb_priv->td_cnt)
+ finish_urb(ahcd, urb);
+
+ /* clean schedule: unlink EDs that are no longer busy */
+ if (list_empty(&ed->td_list)) {
+ if (ed->state == ED_OPER)
+ start_ed_unlink(ahcd, ed);
+
+ /* ... reenabling halted EDs only after fault cleanup */
+ } else if ((ed->hwINFO & cpu_to_hc32 (ahcd,
+ ED_SKIP | ED_DEQUEUE))
+ == cpu_to_hc32 (ahcd, ED_SKIP)) {
+ td = list_entry(ed->td_list.next, struct td, td_list);
+#if 0
+ if (!(td->hwINFO & cpu_to_hc32 (ahcd, TD_DONE))) {
+ ed->hwINFO &= ~cpu_to_hc32 (ahcd, ED_SKIP);
+ /* ... hc may need waking-up */
+ switch (ed->type) {
+ case PIPE_CONTROL:
+ admhc_writel (ahcd, OHCI_CLF,
+ &ahcd->regs->cmdstatus);
+ break;
+ case PIPE_BULK:
+ admhc_writel (ahcd, OHCI_BLF,
+ &ahcd->regs->cmdstatus);
+ break;
+ }
+ }
+#else
+ if ((td->hwINFO & cpu_to_hc32(ahcd, TD_OWN)))
+ ed->hwINFO &= ~cpu_to_hc32(ahcd, ED_SKIP);
+#endif
+ }
- if (list_empty(&ed->urb_pending))
- ed_deschedule(ahcd, ed);
- else
- ed_schedule(ahcd, ed);
}
+}
- if (!more)
- if (likely(HC_IS_RUNNING(admhcd_to_hcd(ahcd)->state)))
- admhc_intr_disable(ahcd, ADMHC_INTR_SOFI);
+/* there are some tds completed; called in_irq(), with HCD locked */
+static void admhc_td_complete(struct admhcd *ahcd)
+{
+ struct ed *ed;
+
+ for (ed = ahcd->ed_head; ed; ed = ed->ed_next) {
+ if (ed->state != ED_OPER)
+ continue;
+
+ ed_update(ahcd, ed);
+ }
}
dma_addr_t dma; /* addr of ED */
struct td *dummy; /* next TD to activate */
- struct urb_priv *urb_active; /* active URB */
- struct list_head urb_pending; /* pending URBs */
-
- struct list_head ed_list; /* list of all EDs*/
- struct list_head rm_list; /* for remove list */
+ struct list_head urb_list; /* list of our URBs */
/* host's view of schedule */
struct ed *ed_next; /* on schedule list */
struct ed *ed_prev; /* for non-interrupt EDs */
+ struct ed *ed_rm_next; /* on rm list */
+ struct list_head td_list; /* "shadow list" of our TDs */
/* create --> IDLE --> OPER --> ... --> IDLE --> destroy
* usually: OPER --> UNLINK --> (IDLE | OPER) --> ...
*/
- u8 state;
-#define ED_NEW 0x00 /* just allocated */
-#define ED_IDLE 0x01 /* linked into HC, but not running */
-#define ED_OPER 0x02 /* linked into HC and running */
-#define ED_UNLINK 0x03 /* being unlinked from HC */
+ u8 state; /* ED_{IDLE,UNLINK,OPER} */
+#define ED_IDLE 0x00 /* NOT linked to HC */
+#define ED_UNLINK 0x01 /* being unlinked from hc */
+#define ED_OPER 0x02 /* IS linked to hc */
u8 type; /* PIPE_{BULK,...} */
#define TD_DP_SHIFT 21 /* direction/pid */
#define TD_DP_MASK 0x3
#define TD_DP (TD_DP_MASK << TD_DP_SHIFT)
+#define TD_DP_GET (((x) >> TD_DP_SHIFT) & TD_DP_MASK)
#define TD_DP_SETUP (0x0 << TD_DP_SHIFT) /* SETUP pid */
#define TD_DP_OUT (0x1 << TD_DP_SHIFT) /* OUT pid */
#define TD_DP_IN (0x2 << TD_DP_SHIFT) /* IN pid */
-#define TD_DP_GET(x) (((x) >> TD_DP_SHIFT) & TD_DP_MASK)
#define TD_ISI_SHIFT 8 /* Interrupt Service Interval */
#define TD_ISI_MASK 0x3f
#define TD_ISI_GET(x) (((x) >> TD_ISI_SHIFT) & TD_ISI_MASK)
/* rest are purely for the driver's use */
__u8 index;
+ struct ed *ed;
+ struct td *td_hash; /* dma-->td hashtable */
+ struct td *next_dl_td;
struct urb *urb;
dma_addr_t td_dma; /* addr of this TD */
dma_addr_t data_dma; /* addr of data it points to */
+ struct list_head td_list; /* "shadow list", TDs on same ED */
+
+ u32 flags;
+#define TD_FLAG_DONE (1 << 17) /* retired to done list */
+#define TD_FLAG_ISO (1 << 16) /* copy of ED_ISO */
} __attribute__ ((aligned(TD_ALIGN))); /* c/b/i need 16; only iso needs 32 */
/*
/* hcd-private per-urb state */
struct urb_priv {
struct ed *ed;
- struct urb *urb;
struct list_head pending; /* URBs on the same ED */
u32 td_cnt; /* # tds in this request */
* hcd adds to schedule for a live hc any time, but removals finish
* only at the start of the next frame.
*/
+
struct ed *ed_head;
struct ed *ed_tails[4];
-// struct ed *periodic[NUM_INTS]; /* shadow int_table */
+ struct ed *ed_rm_list; /* to be removed */
+
+ struct ed *periodic[NUM_INTS]; /* shadow int_table */
#if 0 /* TODO: remove? */
/*
struct dma_pool *td_cache;
struct dma_pool *ed_cache;
struct td *td_hash[TD_HASH_SIZE];
+ struct list_head pending;
/*
* driver state
#endif
}
+static inline void admhc_writel_flush(const struct admhcd *ahcd)
+{
+#if 0
+ /* TODO: remove? */
+ (void) admhc_readl(ahcd, &ahcd->regs->gencontrol);
+#endif
+}
+
+
/*-------------------------------------------------------------------------*/
/* cpu to ahcd */
admhcd_to_hcd(ahcd)->state = HC_STATE_HALT;
}
-#define FI 0x2edf /* 12000 bits per frame (-1) */
-#define FSLDP(fi) (0x7fff & ((6 * ((fi) - 1200)) / 7))
-#define FIT ADMHC_SFI_FIT
-#define LSTHRESH 0x628 /* lowspeed bit threshold */
+#define FI 0x2edf /* 12000 bits per frame (-1) */
+#define FSLDP(fi) (0x7fff & ((6 * ((fi) - 1200)) / 7))
+#define FIT ADMHC_SFI_FIT
+#define LSTHRESH 0x628 /* lowspeed bit threshold */
static inline void periodic_reinit(struct admhcd *ahcd)
{
+#if 0
+ u32 fi = ahcd->fminterval & ADMHC_SFI_FI_MASK;
+ u32 fit = admhc_readl(ahcd, &ahcd->regs->fminterval) & FIT;
+
+ /* TODO: adjust FSLargestDataPacket value too? */
+ admhc_writel(ahcd, (fit ^ FIT) | ahcd->fminterval,
+ &ahcd->regs->fminterval);
+#else
u32 fit = admhc_readl(ahcd, &ahcd->regs->fminterval) & FIT;
/* TODO: adjust FSLargestDataPacket value too? */
admhc_writel(ahcd, (fit ^ FIT) | ahcd->fminterval,
&ahcd->regs->fminterval);
+#endif
}
static inline u32 admhc_read_rhdesc(struct admhcd *ahcd)
projects / openwrt / openwrt.git / commitdiff