diff options
Diffstat (limited to 'cpu/mpc5xxx/usb_ohci.c')
| -rw-r--r-- | cpu/mpc5xxx/usb_ohci.c | 58 |
1 files changed, 50 insertions, 8 deletions
diff --git a/cpu/mpc5xxx/usb_ohci.c b/cpu/mpc5xxx/usb_ohci.c index 8806826..2f19d7e 100644 --- a/cpu/mpc5xxx/usb_ohci.c +++ b/cpu/mpc5xxx/usb_ohci.c @@ -98,6 +98,8 @@ urb_priv_t urb_priv; int got_rhsc; /* device which was disconnected */ struct usb_device *devgone; +/* flag guarding URB transation */ +int urb_finished = 0; /*-------------------------------------------------------------------------*/ @@ -402,6 +404,16 @@ int sohci_submit_job(struct usb_device *dev, unsigned long pipe, void *buffer, return -1; } + /* if we have an unfinished URB from previous transaction let's + * fail and scream as quickly as possible so as not to corrupt + * further communication */ + if (!urb_finished) { + err("sohci_submit_job: URB NOT FINISHED"); + return -1; + } + /* we're about to begin a new transaction here so mark the URB unfinished */ + urb_finished = 0; + /* every endpoint has a ed, locate and fill it */ if (!(ed = ep_add_ed (dev, pipe))) { err("sohci_submit_job: ENOMEM"); @@ -664,7 +676,6 @@ static void td_fill (ohci_t *ohci, unsigned int info, else td->hwBE = 0; td->hwNextTD = ohci_cpu_to_le32 ((unsigned long)td_pt); - td->hwPSW [0] = ohci_cpu_to_le16 (((__u32)data & 0x0FFF) | 0xE000); /* append to queue */ td->ed->hwTailP = td->hwNextTD; @@ -673,7 +684,6 @@ static void td_fill (ohci_t *ohci, unsigned int info, /*-------------------------------------------------------------------------*/ /* prepare all TDs of a transfer */ - static void td_submit_job (struct usb_device *dev, unsigned long pipe, void *buffer, int transfer_len, struct devrequest *setup, urb_priv_t *urb, int interval) { @@ -813,7 +823,7 @@ static int dl_done_list (ohci_t *ohci, td_t *td_list) td_t *td_list_next = NULL; ed_t *ed; int cc = 0; - int stat = 0xff; + int stat = 0; /* urb_t *urb; */ urb_priv_t *lurb_priv; __u32 tdINFO, edHeadP, edTailP; @@ -835,6 +845,7 @@ static int dl_done_list (ohci_t *ohci, td_t *td_list) && (lurb_priv->state != URB_DEL)) { dbg("ConditionCode %#x", cc); stat = cc_to_error[cc]; + urb_finished = 1; } } @@ -1250,18 +1261,35 @@ int submit_common_msg(struct usb_device *dev, unsigned long pipe, void *buffer, stat = USB_ST_CRC_ERR; break; } - if (stat >= 0 && stat < 0xff) { + + /* NOTE: since we are not interrupt driven in U-Boot and always + * handle only one URB at a time, we cannot assume the + * transaction finished on the first successful return from + * hc_interrupt().. unless the flag for current URB is set, + * meaning that all TD's to/from device got actually + * transferred and processed. If the current URB is not + * finished we need to re-iterate this loop so as + * hc_interrupt() gets called again as there needs to be some + * more TD's to process still */ + if ((stat >= 0) && (stat != 0xff) && (urb_finished)) { /* 0xff is returned for an SF-interrupt */ break; } + if (--timeout) { wait_ms(1); + if (!urb_finished) + dbg("\%"); + } else { err("CTL:TIMEOUT "); + dbg("submit_common_msg: TO status %x\n", stat); stat = USB_ST_CRC_ERR; + urb_finished = 1; break; } } +#if 0 /* we got an Root Hub Status Change interrupt */ if (got_rhsc) { #ifdef DEBUG @@ -1283,6 +1311,7 @@ int submit_common_msg(struct usb_device *dev, unsigned long pipe, void *buffer, devgone = dev; } } +#endif dev->status = stat; dev->act_len = transfer_len; @@ -1454,17 +1483,27 @@ hc_interrupt (void) struct ohci_regs *regs = ohci->regs; int ints; int stat = -1; + + if ((ohci->hcca->done_head != 0) && + !(ohci_cpu_to_le32(ohci->hcca->done_head) & 0x01)) { - if ((ohci->hcca->done_head != 0) && !(ohci_cpu_to_le32 (ohci->hcca->done_head) & 0x01)) { - ints = OHCI_INTR_WDH; - } else { - ints = readl (®s->intrstatus); + ints = OHCI_INTR_WDH; + + } else if ((ints = readl (®s->intrstatus)) == ~(u32)0) { + ohci->disabled++; + err ("%s device removed!", ohci->slot_name); + return -1; + + } else if ((ints &= readl (®s->intrenable)) == 0) { + dbg("hc_interrupt: returning..\n"); + return 0xff; } /* dbg("Interrupt: %x frame: %x", ints, le16_to_cpu (ohci->hcca->frame_no)); */ if (ints & OHCI_INTR_RHSC) { got_rhsc = 1; + stat = 0xff; } if (ints & OHCI_INTR_UE) { @@ -1499,6 +1538,7 @@ hc_interrupt (void) /* FIXME: this assumes SOF (1/ms) interrupts don't get lost... */ if (ints & OHCI_INTR_SF) { unsigned int frame = ohci_cpu_to_le16 (ohci->hcca->frame_no) & 1; + wait_ms(1); writel (OHCI_INTR_SF, ®s->intrdisable); if (ohci->ed_rm_list[frame] != NULL) writel (OHCI_INTR_SF, ®s->intrenable); @@ -1589,6 +1629,8 @@ int usb_lowlevel_init(void) ohci_dump (&gohci, 1); #endif ohci_inited = 1; + urb_finished = 1; + return 0; } |