/* hcd->hub_irq_enable() */
static void admhc_rhsc_enable(struct usb_hcd *hcd)
{
struct admhcd *ahcd = hcd_to_admhcd(hcd);
spin_lock_irq(&ahcd->lock);
if (!ahcd->autostop)
del_timer(&hcd->rh_timer); /* Prevent next poll */
admhc_intr_enable(ahcd, ADMHC_INTR_INSM);
spin_unlock_irq(&ahcd->lock);
}
/* admhc_shutdown forcibly disables IRQs and DMA, helping kexec and
* other cases where the next software may expect clean state from the
* "firmware". this is bus-neutral, unlike shutdown() methods.
*/
static void
admhc_shutdown(struct usb_hcd *hcd)
{
struct admhcd *ahcd;
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);
}
static int
admhc_hub_status_data(struct usb_hcd *hcd, char *buf)
{
struct admhcd *ahcd = hcd_to_admhcd(hcd);
int i, changed = 0, length = 1;
int any_connected = 0;
unsigned long flags;
u32 status;
spin_lock_irqsave(&ahcd->lock, flags);
if (!HCD_HW_ACCESSIBLE(hcd))
goto done;
/* init status */
status = admhc_read_rhdesc(ahcd);
if (status & (ADMHC_RH_LPSC | ADMHC_RH_OCIC))
buf[0] = changed = 1;
else
buf[0] = 0;
if (ahcd->num_ports > 7) {
buf[1] = 0;
length++;
}
/* look at each port */
for (i = 0; i < ahcd->num_ports; i++) {
status = admhc_read_portstatus(ahcd, i);
/* can't autostop if ports are connected */
any_connected |= (status & ADMHC_PS_CCS);
if (status & (ADMHC_PS_CSC | ADMHC_PS_PESC | ADMHC_PS_PSSC
| ADMHC_PS_OCIC | ADMHC_PS_PRSC)) {
changed = 1;
if (i < 7)
buf[0] |= 1 << (i + 1);
else
buf[1] |= 1 << (i - 7);
}
}
if (admhc_root_hub_state_changes(ahcd, changed,
any_connected))
set_bit(HCD_FLAG_POLL_RH, &hcd->flags);
else
clear_bit(HCD_FLAG_POLL_RH, &hcd->flags);
done:
spin_unlock_irqrestore(&ahcd->lock, flags);
return changed ? length : 0;
}
static int admhc_start_port_reset(struct usb_hcd *hcd, unsigned port)
{
struct admhcd *ahcd = hcd_to_admhcd(hcd);
u32 status;
if (!port)
return -EINVAL;
port--;
/* start port reset before HNP protocol times out */
status = admhc_read_portstatus(ahcd, port);
if (!(status & ADMHC_PS_CCS))
return -ENODEV;
/* khubd will finish the reset later */
admhc_write_portstatus(ahcd, port, ADMHC_PS_PRS);
return 0;
}
static void admhc_stop(struct usb_hcd *hcd)
{
struct admhcd *ahcd = hcd_to_admhcd(hcd);
admhc_dump(ahcd, 1);
flush_scheduled_work();
admhc_usb_reset(ahcd);
admhc_intr_disable(ahcd, ADMHC_INTR_MIE);
free_irq(hcd->irq, hcd);
hcd->irq = -1;
remove_debug_files(ahcd);
admhc_eds_cleanup(ahcd);
admhc_mem_cleanup(ahcd);
}
/*
* decouple the URB from the HC queues (TDs, urb_priv);
* reporting is always done
* asynchronously, and we might be dealing with an urb that's
* partially transferred, or an ED with other urbs being unlinked.
*/
static int admhc_urb_dequeue(struct usb_hcd *hcd, struct urb *urb,
int status)
{
struct admhcd *ahcd = hcd_to_admhcd(hcd);
unsigned long flags;
int ret;
spin_lock_irqsave(&ahcd->lock, flags);
#ifdef ADMHC_VERBOSE_DEBUG
urb_print(ahcd, urb, "DEQUEUE", 1, status);
#endif
ret = usb_hcd_check_unlink_urb(hcd, urb, status);
if (ret) {
/* Do nothing */
;
} else 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()
*/
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 (urb->hcpriv)
finish_urb(ahcd, urb, status);
}
spin_unlock_irqrestore(&ahcd->lock, flags);
return ret;
}
static int admhc_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
u16 wIndex, char *buf, u16 wLength)
{
struct admhcd *ahcd = hcd_to_admhcd(hcd);
int ports = ahcd->num_ports;
int ret = 0;
if (unlikely(!HCD_HW_ACCESSIBLE(hcd)))
return -ESHUTDOWN;
switch (typeReq) {
case ClearHubFeature:
switch (wValue) {
case C_HUB_OVER_CURRENT:
#if 0 /* FIXME */
admhc_writel(ahcd, ADMHC_RH_OCIC,
&ahcd->regs->roothub.status);
#endif
case C_HUB_LOCAL_POWER:
break;
default:
goto error;
}
break;
case ClearPortFeature:
if (!wIndex || wIndex > ports)
goto error;
wIndex--;
switch (wValue) {
case USB_PORT_FEAT_ENABLE:
ret = admhc_port_disable(ahcd, wIndex);
break;
case USB_PORT_FEAT_SUSPEND:
ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_CPS);
break;
case USB_PORT_FEAT_POWER:
ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_CPP);
break;
case USB_PORT_FEAT_C_CONNECTION:
ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_CSC);
break;
case USB_PORT_FEAT_C_ENABLE:
ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_PESC);
break;
case USB_PORT_FEAT_C_SUSPEND:
ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_PSSC);
break;
case USB_PORT_FEAT_C_OVER_CURRENT:
ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_OCIC);
break;
case USB_PORT_FEAT_C_RESET:
ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_PRSC);
break;
default:
goto error;
}
break;
case GetHubDescriptor:
ret = admhc_get_hub_descriptor(ahcd, buf);
break;
case GetHubStatus:
ret = admhc_get_hub_status(ahcd, buf);
break;
case GetPortStatus:
if (!wIndex || wIndex > ports)
goto error;
wIndex--;
ret = admhc_get_port_status(ahcd, wIndex, buf);
break;
case SetHubFeature:
switch (wValue) {
case C_HUB_OVER_CURRENT:
/* FIXME: this can be cleared, yes? */
case C_HUB_LOCAL_POWER:
break;
default:
goto error;
}
break;
case SetPortFeature:
if (!wIndex || wIndex > ports)
goto error;
wIndex--;
switch (wValue) {
case USB_PORT_FEAT_ENABLE:
ret = admhc_port_enable(ahcd, wIndex);
break;
case USB_PORT_FEAT_RESET:
ret = admhc_port_reset(ahcd, wIndex);
break;
case USB_PORT_FEAT_SUSPEND:
#ifdef CONFIG_USB_OTG
if (hcd->self.otg_port == (wIndex + 1)
&& hcd->self.b_hnp_enable)
start_hnp(ahcd);
else
#endif
ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_SPS);
break;
case USB_PORT_FEAT_POWER:
ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_SPP);
break;
default:
goto error;
}
break;
default:
error:
/* "protocol stall" on error */
ret = -EPIPE;
}
return ret;
}
/*
* queue up an urb for anything except the root hub
*/
static int admhc_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
gfp_t mem_flags)
{
struct admhcd *ahcd = hcd_to_admhcd(hcd);
struct ed *ed;
struct urb_priv *urb_priv;
unsigned int pipe = urb->pipe;
int td_cnt = 0;
unsigned long flags;
int ret = 0;
#ifdef ADMHC_VERBOSE_DEBUG
spin_lock_irqsave(&ahcd->lock, flags);
urb_print(ahcd, urb, "ENQEUE", usb_pipein(pipe), -EINPROGRESS);
spin_unlock_irqrestore(&ahcd->lock, flags);
#endif
/* every endpoint has an ed, locate and maybe (re)initialize it */
ed = ed_get(ahcd, urb->ep, urb->dev, pipe, urb->interval);
if (!ed)
return -ENOMEM;
/* for the private part of the URB we need the number of TDs */
switch (ed->type) {
case PIPE_CONTROL:
if (urb->transfer_buffer_length > TD_DATALEN_MAX)
/* td_submit_urb() doesn't yet handle these */
return -EMSGSIZE;
/* 1 TD for setup, 1 for ACK, plus ... */
td_cnt = 2;
/* FALLTHROUGH */
case PIPE_BULK:
/* one TD for every 4096 Bytes (can be upto 8K) */
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++;
/* ... and maybe a zero length packet to wrap it up */
if (td_cnt == 0)
td_cnt++;
else if ((urb->transfer_flags & URB_ZERO_PACKET) != 0
&& (urb->transfer_buffer_length
% usb_maxpacket(urb->dev, pipe,
usb_pipeout (pipe))) == 0)
td_cnt++;
break;
case PIPE_INTERRUPT:
/*
* for Interrupt IN/OUT transactions, each ED contains
* only 1 TD.
* TODO: check transfer_buffer_length?
*/
td_cnt = 1;
break;
case PIPE_ISOCHRONOUS:
/* number of packets from URB */
td_cnt = urb->number_of_packets;
break;
}
urb_priv = urb_priv_alloc(ahcd, td_cnt, mem_flags);
if (!urb_priv)
return -ENOMEM;
urb_priv->ed = ed;
spin_lock_irqsave(&ahcd->lock, flags);
/* don't submit to a dead HC */
if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) {
ret = -ENODEV;
goto fail;
}
if (!HC_IS_RUNNING(hcd->state)) {
ret = -ENODEV;
goto fail;
}
ret = usb_hcd_link_urb_to_ep(hcd, urb);
if (ret)
goto fail;
/* schedule the ed if needed */
if (ed->state == ED_IDLE) {
ret = ed_schedule(ahcd, ed);
if (ret < 0) {
usb_hcd_unlink_urb_from_ep(hcd, urb);
goto fail;
}
if (ed->type == PIPE_ISOCHRONOUS) {
u16 frame = admhc_frame_no(ahcd);
/* delay a few frames before the first TD */
frame += max_t (u16, 8, ed->interval);
frame &= ~(ed->interval - 1);
frame |= ed->branch;
urb->start_frame = frame;
/* yes, only URB_ISO_ASAP is supported, and
* urb->start_frame is never used as input.
*/
}
} 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);
#ifdef ADMHC_VERBOSE_DEBUG
admhc_dump_ed(ahcd, "admhc_urb_enqueue", urb_priv->ed, 1);
#endif
fail:
if (ret)
urb_priv_free(ahcd, urb_priv);
spin_unlock_irqrestore(&ahcd->lock, flags);
return ret;
}
static irqreturn_t admhc_irq(struct usb_hcd *hcd)
{
struct admhcd *ahcd = hcd_to_admhcd(hcd);
struct admhcd_regs __iomem *regs = ahcd->regs;
u32 ints;
ints = admhc_readl(ahcd, ®s->int_status);
if ((ints & ADMHC_INTR_INTA) == 0) {
/* no unmasked interrupt status is set */
return IRQ_NONE;
}
ints &= admhc_readl(ahcd, ®s->int_enable);
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_intr_disable(ahcd, ADMHC_INTR_BABI);
admhc_intr_ack(ahcd, ADMHC_INTR_BABI);
admhc_err(ahcd, "Babble Detected\n");
}
if (ints & ADMHC_INTR_INSM) {
admhc_vdbg(ahcd, "Root Hub Status Change\n");
ahcd->next_statechange = jiffies + STATECHANGE_DELAY;
admhc_intr_ack(ahcd, ADMHC_INTR_RESI | ADMHC_INTR_INSM);
/* NOTE: Vendors didn't always make the same implementation
* choices for RHSC. Many followed the spec; RHSC triggers
* on an edge, like setting and maybe clearing a port status
* change bit. With others it's level-triggered, active
* until khubd clears all the port status change bits. We'll
* always disable it here and rely on polling until khubd
* re-enables it.
*/
admhc_intr_disable(ahcd, ADMHC_INTR_INSM);
usb_hcd_poll_rh_status(hcd);
} else if (ints & ADMHC_INTR_RESI) {
/* For connect and disconnect events, we expect the controller
* to turn on RHSC along with RD. But for remote wakeup events
* this might not happen.
*/
admhc_vdbg(ahcd, "Resume Detect\n");
admhc_intr_ack(ahcd, ADMHC_INTR_RESI);
hcd->poll_rh = 1;
if (ahcd->autostop) {
spin_lock(&ahcd->lock);
admhc_rh_resume(ahcd);
spin_unlock(&ahcd->lock);
} else
usb_hcd_resume_root_hub(hcd);
}
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);
admhc_td_complete(ahcd);
spin_unlock(&ahcd->lock);
if (HC_IS_RUNNING(hcd->state))
admhc_intr_enable(ahcd, ADMHC_INTR_TDC);
}
if (ints & ADMHC_INTR_SO) {
/* could track INTR_SO to reduce available PCI/... bandwidth */
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 */
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;
}
static int admhc_get_frame_number(struct usb_hcd *hcd)
{
struct admhcd *ahcd = hcd_to_admhcd(hcd);
return admhc_frame_no(ahcd);
}
static void admhc_endpoint_disable(struct usb_hcd *hcd,
struct usb_host_endpoint *ep)
{
struct admhcd *ahcd = hcd_to_admhcd(hcd);
unsigned long flags;
struct ed *ed = ep->hcpriv;
unsigned limit = 1000;
/* ASSERT: any requests/urbs are being unlinked */
/* ASSERT: nobody can be submitting urbs for this any more */
if (!ed)
return;
#ifdef ADMHC_VERBOSE_DEBUG
spin_lock_irqsave(&ahcd->lock, flags);
admhc_dump_ed(ahcd, "EP-DISABLE", ed, 1);
spin_unlock_irqrestore(&ahcd->lock, flags);
#endif
rescan:
spin_lock_irqsave(&ahcd->lock, flags);
if (!HC_IS_RUNNING(hcd->state)) {
sanitize:
ed->state = ED_IDLE;
finish_unlinks(ahcd, 0);
}
switch (ed->state) {
case ED_UNLINK: /* wait for hw to finish? */
/* major IRQ delivery trouble loses INTR_SOFI too... */
if (limit-- == 0) {
admhc_warn(ahcd, "IRQ INTR_SOFI lossage\n");
goto sanitize;
}
spin_unlock_irqrestore(&ahcd->lock, flags);
schedule_timeout_uninterruptible(1);
goto rescan;
case ED_IDLE: /* fully unlinked */
if (list_empty(&ed->td_list)) {
td_free (ahcd, ed->dummy);
ed_free (ahcd, ed);
break;
}
/* else FALL THROUGH */
default:
/* 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) state %d%s\n",
ed, ep->desc.bEndpointAddress, ed->state,
list_empty(&ed->td_list) ? "" : " (has tds)");
td_free(ahcd, ed->dummy);
break;
}
ep->hcpriv = NULL;
spin_unlock_irqrestore(&ahcd->lock, flags);
return;
}
