X-Git-Url: http://git.rohieb.name/openwrt.git/blobdiff_plain/1f01b9bc98782a1658e9ad0001784d714309fe7b..d60ce1b40f304758df396ea08f5eae1a9a43d8b0:/target/linux/adm5120/files/drivers/usb/host/adm5120-q.c diff --git a/target/linux/adm5120/files/drivers/usb/host/adm5120-q.c b/target/linux/adm5120/files/drivers/usb/host/adm5120-q.c index d93f8b9d5..d7d9e67de 100644 --- a/target/linux/adm5120/files/drivers/usb/host/adm5120-q.c +++ b/target/linux/adm5120/files/drivers/usb/host/adm5120-q.c @@ -1,10 +1,16 @@ /* - * OHCI HCD (Host Controller Driver) for USB. + * ADM5120 HCD (Host Controller Driver) for USB * - * (C) Copyright 1999 Roman Weissgaerber - * (C) Copyright 2000-2002 David Brownell + * Copyright (C) 2007-2008 Gabor Juhos + * + * This file was derived from: drivers/usb/host/ohci-q.c + * (C) Copyright 1999 Roman Weissgaerber + * (C) Copyright 2000-2002 David Brownell + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation. * - * This file is licenced under the GPL. */ #include @@ -17,31 +23,14 @@ * PRECONDITION: ahcd lock held, irqs blocked. */ static void -finish_urb(struct admhcd *ahcd, struct urb *urb) +finish_urb(struct admhcd *ahcd, struct urb *urb, int status) __releases(ahcd->lock) __acquires(ahcd->lock) { urb_priv_free(ahcd, urb->hcpriv); - urb->hcpriv = NULL; - spin_lock(&urb->lock); - if (likely(urb->status == -EINPROGRESS)) - urb->status = 0; - - /* report short control reads right even though the data TD always - * has TD_R set. (much simpler, but creates the 1-td limit.) - */ - if (unlikely(urb->transfer_flags & URB_SHORT_NOT_OK) - && unlikely(usb_pipecontrol(urb->pipe)) - && urb->actual_length < urb->transfer_buffer_length - && usb_pipein(urb->pipe) - && urb->status == 0) { - urb->status = -EREMOTEIO; -#ifdef ADMHC_VERBOSE_DEBUG - urb_print(ahcd, urb, "SHORT", usb_pipeout(urb->pipe)); -#endif - } - spin_unlock(&urb->lock); + if (likely(status == -EINPROGRESS)) + status = 0; switch (usb_pipetype(urb->pipe)) { case PIPE_ISOCHRONOUS: @@ -53,12 +42,13 @@ __acquires(ahcd->lock) } #ifdef ADMHC_VERBOSE_DEBUG - urb_print(ahcd, urb, "RET", usb_pipeout (urb->pipe)); + urb_print(ahcd, urb, "RET", usb_pipeout(urb->pipe), status); #endif /* urb->complete() can reenter this HCD */ + usb_hcd_unlink_urb_from_ep(admhcd_to_hcd(ahcd), urb); spin_unlock(&ahcd->lock); - usb_hcd_giveback_urb(admhcd_to_hcd(ahcd), urb); + usb_hcd_giveback_urb(admhcd_to_hcd(ahcd), urb, status); spin_lock(&ahcd->lock); } @@ -83,12 +73,12 @@ static int balance(struct admhcd *ahcd, int interval, int load) * that has enough bandwidth left unreserved. */ for (i = 0; i < interval ; i++) { - if (branch < 0 || ahcd->load [branch] > ahcd->load [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) + if ((ahcd->load[j] + load) > 900) break; } if (j < NUM_INTS) @@ -107,17 +97,17 @@ static int balance(struct admhcd *ahcd, int interval, int load) * 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) +static void periodic_link(struct admhcd *ahcd, struct ed *ed) { unsigned i; - admhc_vdbg (ahcd, "link %sed %p branch %d [%dus.], interval %d\n", + 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 **prev = &ahcd->periodic[i]; + __hc32 *prev_p = &ahcd->hcca->int_table[i]; struct ed *here = *prev; /* sorting each branch by period (slow before fast) @@ -135,12 +125,12 @@ static void periodic_link (struct admhcd *ahcd, struct ed *ed) ed->ed_next = here; if (here) ed->hwNextED = *prev_p; - wmb (); + wmb(); *prev = ed; *prev_p = cpu_to_hc32(ahcd, ed->dma); wmb(); } - ahcd->load [i] += ed->load; + ahcd->load[i] += ed->load; } admhcd_to_hcd(ahcd)->self.bandwidth_allocated += ed->load / ed->interval; } @@ -180,14 +170,14 @@ static int ed_schedule(struct admhcd *ahcd, struct ed *ed) #if 0 /* FIXME */ /* scan the periodic table to find and unlink this ED */ -static void periodic_unlink (struct admhcd *ahcd, struct ed *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]; + struct ed **prev = &ahcd->periodic[i]; + __hc32 *prev_p = &ahcd->hcca->int_table[i]; while (*prev && (temp = *prev) != ed) { prev_p = &temp->hwNextED; @@ -197,11 +187,11 @@ static void periodic_unlink (struct admhcd *ahcd, struct ed *ed) *prev_p = ed->hwNextED; *prev = ed->ed_next; } - ahcd->load [i] -= ed->load; + 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", + 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); } @@ -231,6 +221,11 @@ static void periodic_unlink (struct admhcd *ahcd, struct ed *ed) */ static void ed_deschedule(struct admhcd *ahcd, struct ed *ed) { + +#ifdef ADMHC_VERBOSE_DEBUG + admhc_dump_ed(ahcd, "ED-DESCHED", ed, 1); +#endif + ed->hwINFO |= cpu_to_hc32(ahcd, ED_SKIP); wmb(); ed->state = ED_UNLINK; @@ -333,6 +328,11 @@ static struct ed *ed_get(struct admhcd *ahcd, struct usb_host_endpoint *ep, */ static void start_ed_unlink(struct admhcd *ahcd, struct ed *ed) { + +#ifdef ADMHC_VERBOSE_DEBUG + admhc_dump_ed(ahcd, "ED-UNLINK", ed, 1); +#endif + ed->hwINFO |= cpu_to_hc32(ahcd, ED_DEQUEUE); ed_deschedule(ahcd, ed); @@ -530,7 +530,10 @@ static void td_submit_urb(struct admhcd *ahcd, struct urb *urb) * we could often reduce the number of TDs here. */ case PIPE_ISOCHRONOUS: - info = TD_SCC_NOTACCESSED; + info = is_out + ? TD_T_CARRY | TD_SCC_NOTACCESSED | TD_DP_OUT + : TD_T_CARRY | TD_SCC_NOTACCESSED | TD_DP_IN; + for (cnt = 0; cnt < urb->number_of_packets; cnt++) { int frame = urb->start_frame; @@ -552,73 +555,68 @@ static void td_submit_urb(struct admhcd *ahcd, struct urb *urb) * Done List handling functions *-------------------------------------------------------------------------*/ -/* calculate transfer length/status and update the urb - * PRECONDITION: irqsafe (only for urb->status locking) - */ +/* calculate transfer length/status and update the urb */ 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 info; + u32 bl; + u32 tdDBP; int type = usb_pipetype(urb->pipe); int cc; + int status = -EINPROGRESS; + info = hc32_to_cpup(ahcd, &td->hwINFO); + tdDBP = hc32_to_cpup(ahcd, &td->hwDBP); + bl = TD_BL_GET(hc32_to_cpup(ahcd, &td->hwCBL)); cc = TD_CC_GET(info); /* ISO ... drivers see per-TD length/status */ if (type == PIPE_ISOCHRONOUS) { -#if 0 /* TODO */ int dlen = 0; /* NOTE: assumes FC in tdINFO == 0, and that * only the first of 0..MAXPSW psws is used. */ + if (info & TD_CC) /* hc didn't touch? */ + return status; - cc = TD_CC_GET(td); - if (tdINFO & TD_CC) /* hc didn't touch? */ - return; - - if (usb_pipeout (urb->pipe)) - dlen = urb->iso_frame_desc [td->index].length; + if (usb_pipeout(urb->pipe)) + dlen = urb->iso_frame_desc[td->index].length; else { /* short reads are always OK for ISO */ - if (cc == TD_DATAUNDERRUN) + if (cc == TD_CC_DATAUNDERRUN) cc = TD_CC_NOERROR; - dlen = tdPSW & 0x3ff; + dlen = tdDBP - td->data_dma + bl; } + 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, + admhc_vdbg(ahcd, "urb %p iso td %p (%d) len %d cc %d\n", urb, td, 1 + td->index, dlen, cc); -#endif + /* BULK, INT, CONTROL ... drivers see aggregate length/status, * except that "setup" bytes aren't counted and "short" transfers * might not be reported as errors. */ } else { - 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); - } + if (cc != TD_CC_NOERROR && cc < TD_CC_HCD0) + status = cc_to_error[cc]; + /* count all non-empty packets except control SETUP packet */ - if ((type != PIPE_CONTROL || td->index != 0) && tdDBP != 0) { + 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, @@ -631,15 +629,16 @@ static int td_done(struct admhcd *ahcd, struct urb *urb, struct td *td) list_del(&td->td_list); urb_priv->td_idx++; - return cc; + return status; } /*-------------------------------------------------------------------------*/ -static inline struct td * +static inline void ed_halted(struct admhcd *ahcd, struct td *td, int cc, struct td *rev) { struct urb *urb = td->urb; + struct urb_priv *urb_priv = urb->hcpriv; struct ed *ed = td->ed; struct list_head *tmp = td->td_list.next; __hc32 toggle = ed->hwHeadP & cpu_to_hc32(ahcd, ED_C); @@ -652,13 +651,12 @@ ed_halted(struct admhcd *ahcd, struct td *td, int cc, struct td *rev) wmb(); ed->hwHeadP &= ~cpu_to_hc32(ahcd, ED_H); - /* 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. + /* Get rid of all later tds from this urb. We don't have + * to be careful: 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; next = list_entry(tmp, struct td, td_list); tmp = next->td_list.next; @@ -673,16 +671,8 @@ ed_halted(struct admhcd *ahcd, struct td *td, int cc, struct td *rev) * 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; - - next->next_dl_td = rev; - rev = next; - + list_del(&next->td_list); + urb_priv->td_cnt++; ed->hwHeadP = next->hwNextTD | toggle; } @@ -700,16 +690,14 @@ ed_halted(struct admhcd *ahcd, struct td *td, int cc, struct td *rev) break; /* fallthrough */ default: - admhc_dbg (ahcd, + 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", + usb_pipein(urb->pipe) ? "in" : "out", hc32_to_cpu(ahcd, td->hwINFO), - cc, cc_to_error [cc]); + cc, cc_to_error[cc]); } - - return rev; } /*-------------------------------------------------------------------------*/ @@ -730,12 +718,12 @@ rescan_all: * 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)) { + if (tick_before(tick, ed->tick)) { skip_ed: last = &ed->ed_rm_next; continue; } - +#if 0 if (!list_empty(&ed->td_list)) { struct td *td; u32 head; @@ -749,6 +737,7 @@ skip_ed: if (td->td_dma != head) goto skip_ed; } +#endif } /* reentrancy: if we drop the schedule lock, someone might @@ -775,12 +764,13 @@ rescan_this: struct urb *urb; struct urb_priv *urb_priv; __hc32 savebits; + int status; td = list_entry(entry, struct td, td_list); urb = td->urb; urb_priv = td->urb->hcpriv; - if (urb->status == -EINPROGRESS) { + if (!urb->unlinked) { prev = &td->hwNextTD; continue; } @@ -793,13 +783,15 @@ rescan_this: *prev = td->hwNextTD | savebits; /* HC may have partly processed this TD */ - urb_print(ahcd, urb, "PARTIAL", 1); - td_done(ahcd, urb, td); +#ifdef ADMHC_VERBOSE_DEBUG + urb_print(ahcd, urb, "PARTIAL", 0); +#endif + status = td_done(ahcd, urb, td); /* if URB is done, clean up */ if (urb_priv->td_idx == urb_priv->td_cnt) { modified = completed = 1; - finish_urb(ahcd, urb); + finish_urb(ahcd, urb, status); } } if (completed && !list_empty(&ed->td_list)) @@ -809,7 +801,7 @@ rescan_this: ed->state = ED_IDLE; ed->hwHeadP &= ~cpu_to_hc32(ahcd, ED_H); ed->hwNextED = 0; - wmb (); + wmb(); ed->hwINFO &= ~cpu_to_hc32(ahcd, ED_SKIP | ED_DEQUEUE); /* but if there's work queued, reschedule */ @@ -835,7 +827,7 @@ rescan_this: static void ed_unhalt(struct admhcd *ahcd, struct ed *ed, struct urb *urb) { - struct list_head *entry,*tmp; + struct list_head *entry, *tmp; __hc32 toggle = ed->hwHeadP & cpu_to_hc32(ahcd, ED_C); #ifdef ADMHC_VERBOSE_DEBUG @@ -865,6 +857,14 @@ static void ed_unhalt(struct admhcd *ahcd, struct ed *ed, struct urb *urb) } +static void ed_intr_refill(struct admhcd *ahcd, struct ed *ed) +{ + __hc32 toggle = ed->hwHeadP & cpu_to_hc32(ahcd, ED_C); + + ed->hwHeadP = ed->hwTailP | toggle; +} + + static inline int is_ed_halted(struct admhcd *ahcd, struct ed *ed) { return ((hc32_to_cpup(ahcd, &ed->hwHeadP) & ED_H) == ED_H); @@ -879,29 +879,32 @@ static inline int is_td_halted(struct admhcd *ahcd, struct ed *ed, static void ed_update(struct admhcd *ahcd, struct ed *ed) { - struct list_head *entry,*tmp; + struct list_head *entry, *tmp; #ifdef ADMHC_VERBOSE_DEBUG - admhc_dump_ed(ahcd, "UPDATE", ed, 0); + admhc_dump_ed(ahcd, "UPDATE", ed, 1); #endif 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; + int status; if (hc32_to_cpup(ahcd, &td->hwINFO) & TD_OWN) break; /* update URB's length and status from TD */ - cc = td_done(ahcd, urb, td); + status = td_done(ahcd, urb, td); if (is_ed_halted(ahcd, ed) && is_td_halted(ahcd, ed, td)) ed_unhalt(ahcd, ed, urb); + if (ed->type == PIPE_INTERRUPT) + ed_intr_refill(ahcd, ed); + /* If all this urb's TDs are done, call complete() */ if (urb_priv->td_idx == urb_priv->td_cnt) - finish_urb(ahcd, urb); + finish_urb(ahcd, urb, status); /* clean schedule: unlink EDs that are no longer busy */ if (list_empty(&ed->td_list)) { @@ -919,11 +922,11 @@ static void ed_update(struct admhcd *ahcd, struct ed *ed) /* ... hc may need waking-up */ switch (ed->type) { case PIPE_CONTROL: - admhc_writel (ahcd, OHCI_CLF, + admhc_writel(ahcd, OHCI_CLF, &ahcd->regs->cmdstatus); break; case PIPE_BULK: - admhc_writel (ahcd, OHCI_BLF, + admhc_writel(ahcd, OHCI_BLF, &ahcd->regs->cmdstatus); break; }