/* * URB OHCI HCD (Host Controller Driver) for USB. * * (C) Copyright 1999 Roman Weissgaerber * * [ Initialisation is based on Linus' ] * [ uhci code and gregs ohci fragments ] * [ (C) Copyright 1999 Linus Torvalds ] * [ (C) Copyright 1999 Gregory P. Smith] * * * History: * * v5.2 1999/12/07 URB 3rd preview, * v5.1 1999/11/30 URB 2nd preview, cpia, (usb-scsi) * v5.0 1999/11/22 URB Technical preview, Paul Mackerras powerbook susp/resume * i386: HUB, Keyboard, Mouse, Printer * * v4.3 1999/10/27 multiple HCs, bulk_request * v4.2 1999/09/05 ISO API alpha, new dev alloc, neg Error-codes * v4.1 1999/08/27 Randy Dunlap's - ISO API first impl. * v4.0 1999/08/18 * v3.0 1999/06/25 * v2.1 1999/05/09 code clean up * v2.0 1999/05/04 * v1.0 1999/04/27 initial release * */ #include #include #include #include #include #include #include #include #include #include #include #include #include /* for in_interrupt() */ #undef DEBUG #include #include #include #include #include #define OHCI_USE_NPS // force NoPowerSwitching mode #include "usb-ohci.h" #include static int handle_pm_event (struct pm_dev *dev, pm_request_t rqst, void *data); #ifdef CONFIG_PMAC_PBOOK #include #include #endif /* For initializing controller (mask in an HCFS mode too) */ #define OHCI_CONTROL_INIT \ (OHCI_CTRL_CBSR & 0x3) \ | OHCI_CTRL_BLE | OHCI_CTRL_CLE | OHCI_CTRL_IE | OHCI_CTRL_PLE static DECLARE_WAIT_QUEUE_HEAD (op_wakeup); static LIST_HEAD (ohci_hcd_list); static spinlock_t usb_ed_lock = SPIN_LOCK_UNLOCKED; /*-------------------------------------------------------------------------* * URB support functions *-------------------------------------------------------------------------*/ /* free the private part of an URB */ static void urb_rm_priv (urb_t * urb) { urb_priv_t * urb_priv = urb->hcpriv; int i; if (!urb_priv) return; for (i = 0; i < urb_priv->length; i++) { if (urb_priv->td [i]) { OHCI_FREE (urb_priv->td [i]); } } kfree (urb->hcpriv); urb->hcpriv = NULL; } /*-------------------------------------------------------------------------*/ #ifdef DEBUG static int sohci_get_current_frame_number (struct usb_device * dev); /* debug| print the main components of an URB * small: 0) header + data packets 1) just header */ static void urb_print (urb_t * urb, char * str, int small) { unsigned int pipe= urb->pipe; int i, len; if (!urb->dev || !urb->dev->bus) { dbg("%s URB: no dev", str); return; } dbg("%s URB:[%4x] dev:%2d,ep:%2d-%c,type:%s,flags:%4x,len:%d/%d,stat:%d(%x)", str, sohci_get_current_frame_number (urb->dev), usb_pipedevice (pipe), usb_pipeendpoint (pipe), usb_pipeout (pipe)? 'O': 'I', usb_pipetype (pipe) < 2? (usb_pipeint (pipe)? "INTR": "ISOC"): (usb_pipecontrol (pipe)? "CTRL": "BULK"), urb->transfer_flags, urb->actual_length, urb->transfer_buffer_length, urb->status, urb->status); if (!small) { if (usb_pipecontrol (pipe)) { printk (KERN_DEBUG __FILE__ ": cmd(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) { 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); } } } /* just for debugging; prints non-empty branches of the int ed tree inclusive iso eds*/ void ep_print_int_eds (ohci_t * ohci, char * str) { int i, j; __u32 * ed_p; for (i= 0; i < 32; i++) { j = 5; ed_p = &(ohci->hcca.int_table [i]); if (*ed_p == 0) continue; printk (KERN_DEBUG __FILE__ ": %s branch int %2d(%2x):", str, i, i); while (*ed_p != 0 && j--) { ed_t *ed = (ed_t *) bus_to_virt(le32_to_cpup(ed_p)); printk (" ed: %4x;", ed->hwINFO); ed_p = &ed->hwNextED; } printk ("\n"); } } static void ohci_dump_intr_mask (char *label, __u32 mask) { dbg ("%s: 0x%08x%s%s%s%s%s%s%s%s%s", label, mask, (mask & OHCI_INTR_MIE) ? " MIE" : "", (mask & OHCI_INTR_OC) ? " OC" : "", (mask & OHCI_INTR_RHSC) ? " RHSC" : "", (mask & OHCI_INTR_FNO) ? " FNO" : "", (mask & OHCI_INTR_UE) ? " UE" : "", (mask & OHCI_INTR_RD) ? " RD" : "", (mask & OHCI_INTR_SF) ? " SF" : "", (mask & OHCI_INTR_WDH) ? " WDH" : "", (mask & OHCI_INTR_SO) ? " SO" : "" ); } static void maybe_print_eds (char *label, __u32 value) { if (value) dbg ("%s %08x", label, value); } static char *hcfs2string (int state) { switch (state) { case OHCI_USB_RESET: return "reset"; case OHCI_USB_RESUME: return "resume"; case OHCI_USB_OPER: return "operational"; case OHCI_USB_SUSPEND: return "suspend"; } return "?"; } // dump control and status registers static void ohci_dump_status (ohci_t *controller) { struct ohci_regs *regs = controller->regs; __u32 temp; temp = readl (®s->revision) & 0xff; if (temp != 0x10) dbg ("spec %d.%d", (temp >> 4), (temp & 0x0f)); temp = readl (®s->control); dbg ("control: 0x%08x%s%s%s HCFS=%s%s%s%s%s CBSR=%d", temp, (temp & OHCI_CTRL_RWE) ? " RWE" : "", (temp & OHCI_CTRL_RWC) ? " RWC" : "", (temp & OHCI_CTRL_IR) ? " IR" : "", hcfs2string (temp & OHCI_CTRL_HCFS), (temp & OHCI_CTRL_BLE) ? " BLE" : "", (temp & OHCI_CTRL_CLE) ? " CLE" : "", (temp & OHCI_CTRL_IE) ? " IE" : "", (temp & OHCI_CTRL_PLE) ? " PLE" : "", temp & OHCI_CTRL_CBSR ); temp = readl (®s->cmdstatus); dbg ("cmdstatus: 0x%08x SOC=%d%s%s%s%s", temp, (temp & OHCI_SOC) >> 16, (temp & OHCI_OCR) ? " OCR" : "", (temp & OHCI_BLF) ? " BLF" : "", (temp & OHCI_CLF) ? " CLF" : "", (temp & OHCI_HCR) ? " HCR" : "" ); ohci_dump_intr_mask ("intrstatus", readl (®s->intrstatus)); ohci_dump_intr_mask ("intrenable", readl (®s->intrenable)); // intrdisable always same as intrenable // ohci_dump_intr_mask ("intrdisable", readl (®s->intrdisable)); maybe_print_eds ("ed_periodcurrent", readl (®s->ed_periodcurrent)); maybe_print_eds ("ed_controlhead", readl (®s->ed_controlhead)); maybe_print_eds ("ed_controlcurrent", readl (®s->ed_controlcurrent)); maybe_print_eds ("ed_bulkhead", readl (®s->ed_bulkhead)); maybe_print_eds ("ed_bulkcurrent", readl (®s->ed_bulkcurrent)); maybe_print_eds ("donehead", readl (®s->donehead)); } static void ohci_dump_roothub (ohci_t *controller, int verbose) { struct ohci_regs *regs = controller->regs; __u32 temp, ndp, i; temp = readl (®s->roothub.a); ndp = (temp & RH_A_NDP); if (verbose) { dbg ("roothub.a: %08x POTPGT=%d%s%s%s%s%s NDP=%d", temp, ((temp & RH_A_POTPGT) >> 24) & 0xff, (temp & RH_A_NOCP) ? " NOCP" : "", (temp & RH_A_OCPM) ? " OCPM" : "", (temp & RH_A_DT) ? " DT" : "", (temp & RH_A_NPS) ? " NPS" : "", (temp & RH_A_PSM) ? " PSM" : "", ndp ); temp = readl (®s->roothub.b); dbg ("roothub.b: %08x PPCM=%04x DR=%04x", temp, (temp & RH_B_PPCM) >> 16, (temp & RH_B_DR) ); temp = readl (®s->roothub.status); dbg ("roothub.status: %08x%s%s%s%s%s%s", temp, (temp & RH_HS_CRWE) ? " CRWE" : "", (temp & RH_HS_OCIC) ? " OCIC" : "", (temp & RH_HS_LPSC) ? " LPSC" : "", (temp & RH_HS_DRWE) ? " DRWE" : "", (temp & RH_HS_OCI) ? " OCI" : "", (temp & RH_HS_LPS) ? " LPS" : "" ); } for (i = 0; i < ndp; i++) { temp = readl (®s->roothub.portstatus [i]); dbg ("roothub.portstatus [%d] = 0x%08x%s%s%s%s%s%s%s%s%s%s%s%s", i, temp, (temp & RH_PS_PRSC) ? " PRSC" : "", (temp & RH_PS_OCIC) ? " OCIC" : "", (temp & RH_PS_PSSC) ? " PSSC" : "", (temp & RH_PS_PESC) ? " PESC" : "", (temp & RH_PS_CSC) ? " CSC" : "", (temp & RH_PS_LSDA) ? " LSDA" : "", (temp & RH_PS_PPS) ? " PPS" : "", (temp & RH_PS_PRS) ? " PRS" : "", (temp & RH_PS_POCI) ? " POCI" : "", (temp & RH_PS_PSS) ? " PSS" : "", (temp & RH_PS_PES) ? " PES" : "", (temp & RH_PS_CCS) ? " CCS" : "" ); } } static void ohci_dump (ohci_t *controller, int verbose) { dbg ("OHCI controller %s state", controller->ohci_dev->slot_name); // dumps some of the state we know about ohci_dump_status (controller); if (verbose) ep_print_int_eds (controller, "hcca"); dbg ("hcca frame #%04x", controller->hcca.frame_no); ohci_dump_roothub (controller, 1); } #endif /*-------------------------------------------------------------------------* * Interface functions (URB) *-------------------------------------------------------------------------*/ /* return a request to the completion handler */ static int sohci_return_urb (urb_t * urb) { urb_priv_t * urb_priv = urb->hcpriv; urb_t * urbt; unsigned long flags; int i; /* just to be sure */ if (!urb->complete) { urb_rm_priv (urb); usb_dec_dev_use (urb->dev); return -1; } if (!urb_priv) return -1; /* urb already unlinked */ #ifdef DEBUG urb_print (urb, "RET", usb_pipeout (urb->pipe)); #endif switch (usb_pipetype (urb->pipe)) { case PIPE_INTERRUPT: urb->complete (urb); /* call complete and requeue URB */ urb->actual_length = 0; urb->status = USB_ST_URB_PENDING; if (urb_priv->state != URB_DEL) td_submit_urb (urb); break; case PIPE_ISOCHRONOUS: for (urbt = urb->next; urbt && (urbt != urb); urbt = urbt->next); if (urbt) { /* send the reply and requeue URB */ urb->complete (urb); spin_lock_irqsave (&usb_ed_lock, flags); urb->actual_length = 0; urb->status = USB_ST_URB_PENDING; urb->start_frame = urb_priv->ed->last_iso + 1; if (urb_priv->state != URB_DEL) { for (i = 0; i < urb->number_of_packets; i++) { urb->iso_frame_desc[i].actual_length = 0; urb->iso_frame_desc[i].status = -EXDEV; } td_submit_urb (urb); } spin_unlock_irqrestore (&usb_ed_lock, flags); } else { /* unlink URB, call complete */ urb_rm_priv (urb); usb_dec_dev_use (urb->dev); urb->complete (urb); } break; case PIPE_BULK: case PIPE_CONTROL: /* unlink URB, call complete */ urb_rm_priv (urb); usb_dec_dev_use (urb->dev); urb->complete (urb); break; } return 0; } /*-------------------------------------------------------------------------*/ /* get a transfer request */ static int sohci_submit_urb (urb_t * urb) { ohci_t * ohci; ed_t * ed; urb_priv_t * urb_priv; unsigned int pipe = urb->pipe; int i, size = 0; unsigned long flags; if (!urb->dev || !urb->dev->bus) return -EINVAL; if (urb->hcpriv) return -EINVAL; /* urb already in use */ // if(usb_endpoint_halted (urb->dev, usb_pipeendpoint (pipe), usb_pipeout (pipe))) // return -EPIPE; usb_inc_dev_use (urb->dev); ohci = (ohci_t *) urb->dev->bus->hcpriv; #ifdef DEBUG urb_print (urb, "SUB", usb_pipein (pipe)); #endif /* a request to the virtual root hub */ if (usb_pipedevice (pipe) == ohci->rh.devnum) return rh_submit_urb (urb); /* when controller's hung, permit only hub cleanup attempts * such as powering down ports */ if (ohci->disabled) return -ESHUTDOWN; /* every endpoint has a ed, locate and fill it */ if (!(ed = ep_add_ed (urb->dev, pipe, urb->interval, 1))) { usb_dec_dev_use (urb->dev); return -ENOMEM; } /* for the private part of the URB we need the number of TDs (size) */ switch (usb_pipetype (pipe)) { case PIPE_BULK: /* one TD for every 4096 Byte */ size = (urb->transfer_buffer_length - 1) / 4096 + 1; break; case PIPE_ISOCHRONOUS: /* number of packets from URB */ size = urb->number_of_packets; for (i = 0; i < urb->number_of_packets; i++) { urb->iso_frame_desc[i].actual_length = 0; urb->iso_frame_desc[i].status = -EXDEV; } break; case PIPE_CONTROL: /* 1 TD for setup, 1 for ACK and 1 for every 4096 B */ size = (urb->transfer_buffer_length == 0)? 2: (urb->transfer_buffer_length - 1) / 4096 + 3; break; case PIPE_INTERRUPT: /* one TD */ size = 1; break; } /* allocate the private part or the URB */ urb_priv = kmalloc (sizeof (urb_priv_t) + size * sizeof (td_t *), in_interrupt() ? GFP_ATOMIC : GFP_KERNEL); if (!urb_priv) { usb_dec_dev_use (urb->dev); return -ENOMEM; } memset (urb_priv, 0, sizeof (urb_priv_t) + size * sizeof (td_t *)); /* fill the private part of the URB */ urb->hcpriv = urb_priv; urb_priv->length = size; urb_priv->td_cnt = 0; urb_priv->state = 0; urb_priv->ed = ed; /* allocate the TDs */ for (i = 0; i < size; i++) { OHCI_ALLOC (urb_priv->td[i], sizeof (td_t)); if (!urb_priv->td[i]) { usb_dec_dev_use (urb->dev); urb_rm_priv (urb); return -ENOMEM; } } spin_lock_irqsave (&usb_ed_lock, flags); if (ed->state == ED_NEW || (ed->state & ED_DEL)) { urb_rm_priv(urb); usb_dec_dev_use (urb->dev); spin_unlock_irqrestore(&usb_ed_lock, flags); return -EINVAL; } /* for ISOC transfers calculate start frame index */ if (urb->transfer_flags & USB_ISO_ASAP) { urb->start_frame = ((ed->state == ED_OPER)? (ed->last_iso + 1): (le16_to_cpu (ohci->hcca.frame_no) + 10)) & 0xffff; } urb->status = USB_ST_URB_PENDING; urb->actual_length = 0; if (ed->state != ED_OPER) /* link the ed into a chain if is not already */ ep_link (ohci, ed); urb->status = USB_ST_URB_PENDING; td_submit_urb (urb); /* fill the TDs and link it to the ed */ spin_unlock_irqrestore (&usb_ed_lock, flags); return 0; } /*-------------------------------------------------------------------------*/ /* deactivate all TDs and remove the private part of the URB */ static int sohci_unlink_urb (urb_t * urb) { unsigned long flags; ohci_t * ohci; DECLARE_WAITQUEUE (wait, current); if (!urb) /* just to be sure */ return -EINVAL; if (!urb->dev || !urb->dev->bus) return -ENODEV; ohci = (ohci_t *) urb->dev->bus->hcpriv; #ifdef DEBUG urb_print (urb, "UNLINK", 1); #endif if (usb_pipedevice (urb->pipe) == ohci->rh.devnum) { usb_dec_dev_use(urb->dev); return rh_unlink_urb (urb); /* a request to the virtual root hub */ } if (urb->hcpriv) { /* URB active? */ if (urb->status == USB_ST_URB_PENDING && !ohci->disabled) { urb_priv_t * urb_priv = urb->hcpriv; urb_priv->state = URB_DEL; /* we want to delete the TDs of an URB from an ed * request the deletion, it will be handled at the * next USB-frame */ spin_lock_irqsave (&usb_ed_lock, flags); ep_rm_ed (urb->dev, urb_priv->ed); urb_priv->ed->state |= ED_URB_DEL; spin_unlock_irqrestore (&usb_ed_lock, flags); if (!(urb->transfer_flags & USB_ASYNC_UNLINK)) { usb_dec_dev_use (urb->dev); add_wait_queue (&op_wakeup, &wait); current->state = TASK_UNINTERRUPTIBLE; if (!schedule_timeout (HZ / 10)) /* wait until all TDs are deleted */ err("unlink URB timeout!"); remove_wait_queue (&op_wakeup, &wait); urb->status = -ENOENT; } else { /* usb_dec_dev_use done in dl_del_list() */ urb->status = -EINPROGRESS; } } else { usb_dec_dev_use (urb->dev); urb_rm_priv (urb); if (urb->complete && (urb->transfer_flags & USB_ASYNC_UNLINK)) { urb->complete (urb); urb->status = 0; } else urb->status = -ENOENT; } } return 0; } /*-------------------------------------------------------------------------*/ /* allocate private data space for a usb device */ static int sohci_alloc_dev (struct usb_device *usb_dev) { struct ohci_device * dev; dev = kmalloc (sizeof (*dev), GFP_KERNEL); if (!dev) return -ENOMEM; memset (dev, 0, sizeof (*dev)); usb_dev->hcpriv = dev; return 0; } /*-------------------------------------------------------------------------*/ /* free private data space of usb device */ static int sohci_free_dev (struct usb_device * usb_dev) { unsigned long flags; int i, cnt = 0; ed_t * ed; DECLARE_WAITQUEUE (wait, current); struct ohci_device * dev = usb_to_ohci (usb_dev); ohci_t * ohci = usb_dev->bus->hcpriv; if (!dev) return 0; if (usb_dev->devnum >= 0) { /* delete all TDs of all EDs */ spin_lock_irqsave (&usb_ed_lock, flags); for(i = 0; i < NUM_EDS; i++) { ed = &(dev->ed[i]); if (ed->state != ED_NEW) { if (ed->state == ED_OPER) ep_unlink (ohci, ed); ep_rm_ed (usb_dev, ed); ed->state = ED_DEL; cnt++; } } spin_unlock_irqrestore (&usb_ed_lock, flags); if (cnt > 0) { if (ohci->disabled) { /* FIXME: Something like this should kick in, * though it's currently an exotic case ... * the controller won't ever be touching * these lists again!! dl_del_list (ohci, le16_to_cpu (ohci->hcca.frame_no) & 1); */ warn ("TD leak, %d", cnt); } else if (!in_interrupt ()) { /* SF interrupt handler calls dl_del_list */ add_wait_queue (&op_wakeup, &wait); current->state = TASK_UNINTERRUPTIBLE; schedule_timeout (HZ / 10); remove_wait_queue (&op_wakeup, &wait); } else { /* drivers mustn't expect this to work */ err ("can't free tds, interrupt context"); } } } kfree (dev); return 0; } /*-------------------------------------------------------------------------*/ /* tell us the current USB frame number */ static int sohci_get_current_frame_number (struct usb_device *usb_dev) { ohci_t * ohci = usb_dev->bus->hcpriv; return le16_to_cpu (ohci->hcca.frame_no); } /*-------------------------------------------------------------------------*/ struct usb_operations sohci_device_operations = { sohci_alloc_dev, sohci_free_dev, sohci_get_current_frame_number, sohci_submit_urb, sohci_unlink_urb }; /*-------------------------------------------------------------------------* * ED handling functions *-------------------------------------------------------------------------*/ /* search for the right branch to insert an interrupt ed into the int tree * do some load ballancing; * returns the branch and * sets the interval to interval = 2^integer (ld (interval)) */ static int ep_int_ballance (ohci_t * ohci, int interval, int load) { int i, branch = 0; /* search for the least loaded interrupt endpoint branch of all 32 branches */ for (i = 0; i < 32; i++) if (ohci->ohci_int_load [branch] > ohci->ohci_int_load [i]) branch = i; branch = branch % interval; for (i = branch; i < 32; i += interval) ohci->ohci_int_load [i] += load; return branch; } /*-------------------------------------------------------------------------*/ /* 2^int( ld (inter)) */ static int ep_2_n_interval (int inter) { int i; for (i = 0; ((inter >> i) > 1 ) && (i < 5); i++); return 1 << i; } /*-------------------------------------------------------------------------*/ /* the int tree is a binary tree * in order to process it sequentially the indexes of the branches have to be mapped * the mapping reverses the bits of a word of num_bits length */ static int ep_rev (int num_bits, int word) { int i, wout = 0; for (i = 0; i < num_bits; i++) wout |= (((word >> i) & 1) << (num_bits - i - 1)); return wout; } /*-------------------------------------------------------------------------*/ /* link an ed into one of the HC chains */ static int ep_link (ohci_t * ohci, ed_t * edi) { int int_branch; int i; int inter; int interval; int load; __u32 * ed_p; volatile ed_t * ed = edi; ed->state = ED_OPER; switch (ed->type) { case CTRL: ed->hwNextED = 0; if (ohci->ed_controltail == NULL) { writel (virt_to_bus (ed), &ohci->regs->ed_controlhead); } else { ohci->ed_controltail->hwNextED = cpu_to_le32 (virt_to_bus (ed)); } ed->ed_prev = ohci->ed_controltail; ohci->ed_controltail = edi; break; case BULK: ed->hwNextED = 0; if (ohci->ed_bulktail == NULL) { writel (virt_to_bus (ed), &ohci->regs->ed_bulkhead); } else { ohci->ed_bulktail->hwNextED = cpu_to_le32 (virt_to_bus (ed)); } ed->ed_prev = ohci->ed_bulktail; ohci->ed_bulktail = edi; break; case INT: load = ed->int_load; interval = ep_2_n_interval (ed->int_period); ed->int_interval = interval; int_branch = ep_int_ballance (ohci, interval, load); ed->int_branch = int_branch; for (i = 0; i < ep_rev (6, interval); i += inter) { inter = 1; for (ed_p = &(ohci->hcca.int_table[ep_rev (5, i) + int_branch]); (*ed_p != 0) && (((ed_t *) bus_to_virt (le32_to_cpup (ed_p)))->int_interval >= interval); ed_p = &(((ed_t *) bus_to_virt (le32_to_cpup (ed_p)))->hwNextED)) inter = ep_rev (6, ((ed_t *) bus_to_virt (le32_to_cpup (ed_p)))->int_interval); ed->hwNextED = *ed_p; *ed_p = cpu_to_le32 (virt_to_bus (ed)); } #ifdef DEBUG ep_print_int_eds (ohci, "LINK_INT"); #endif break; case ISO: ed->hwNextED = 0; ed->int_interval = 1; if (ohci->ed_isotail != NULL) { ohci->ed_isotail->hwNextED = cpu_to_le32 (virt_to_bus (ed)); ed->ed_prev = ohci->ed_isotail; } else { for ( i = 0; i < 32; i += inter) { inter = 1; for (ed_p = &(ohci->hcca.int_table[ep_rev (5, i)]); *ed_p != 0; ed_p = &(((ed_t *) bus_to_virt (le32_to_cpup (ed_p)))->hwNextED)) inter = ep_rev (6, ((ed_t *) bus_to_virt (le32_to_cpup (ed_p)))->int_interval); *ed_p = cpu_to_le32 (virt_to_bus (ed)); } ed->ed_prev = NULL; } ohci->ed_isotail = edi; #ifdef DEBUG ep_print_int_eds (ohci, "LINK_ISO"); #endif break; } return 0; } /*-------------------------------------------------------------------------*/ /* unlink an ed from one of the HC chains. * 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 */ static int ep_unlink (ohci_t * ohci, ed_t * ed) { int int_branch; int i; int inter; int interval; __u32 * ed_p; switch (ed->type) { case CTRL: if (ed->ed_prev == NULL) { writel (le32_to_cpup (&ed->hwNextED), &ohci->regs->ed_controlhead); } else { ed->ed_prev->hwNextED = ed->hwNextED; } if(ohci->ed_controltail == ed) { ohci->ed_controltail = ed->ed_prev; } else { ((ed_t *) bus_to_virt (le32_to_cpup (&ed->hwNextED)))->ed_prev = ed->ed_prev; } break; case BULK: if (ed->ed_prev == NULL) { writel (le32_to_cpup (&ed->hwNextED), &ohci->regs->ed_bulkhead); } else { ed->ed_prev->hwNextED = ed->hwNextED; } if (ohci->ed_bulktail == ed) { ohci->ed_bulktail = ed->ed_prev; } else { ((ed_t *) bus_to_virt (le32_to_cpup (&ed->hwNextED)))->ed_prev = ed->ed_prev; } break; case INT: int_branch = ed->int_branch; interval = ed->int_interval; for (i = 0; i < ep_rev (6, interval); i += inter) { for (ed_p = &(ohci->hcca.int_table[ep_rev (5, i) + int_branch]), inter = 1; (*ed_p != 0) && (*ed_p != ed->hwNextED); ed_p = &(((ed_t *) bus_to_virt (le32_to_cpup (ed_p)))->hwNextED), inter = ep_rev (6, ((ed_t *) bus_to_virt (le32_to_cpup (ed_p)))->int_interval)) { if(((ed_t *) bus_to_virt (le32_to_cpup (ed_p))) == ed) { *ed_p = ed->hwNextED; break; } } } for (i = int_branch; i < 32; i += interval) ohci->ohci_int_load[i] -= ed->int_load; #ifdef DEBUG ep_print_int_eds (ohci, "UNLINK_INT"); #endif break; case ISO: if (ohci->ed_isotail == ed) ohci->ed_isotail = ed->ed_prev; if (ed->hwNextED != 0) ((ed_t *) bus_to_virt (le32_to_cpup (&ed->hwNextED)))->ed_prev = ed->ed_prev; if (ed->ed_prev != NULL) { ed->ed_prev->hwNextED = ed->hwNextED; } else { for (i = 0; i < 32; i += inter) { inter = 1; for (ed_p = &(ohci->hcca.int_table[ep_rev (5, i)]); *ed_p != 0; ed_p = &(((ed_t *) bus_to_virt (le32_to_cpup (ed_p)))->hwNextED)) { inter = ep_rev (6, ((ed_t *) bus_to_virt (le32_to_cpup (ed_p)))->int_interval); if(((ed_t *) bus_to_virt (le32_to_cpup (ed_p))) == ed) { *ed_p = ed->hwNextED; break; } } } } #ifdef DEBUG ep_print_int_eds (ohci, "UNLINK_ISO"); #endif break; } ed->state = ED_UNLINK; return 0; } /*-------------------------------------------------------------------------*/ /* add/reinit an endpoint; this should be done once at the usb_set_configuration command, * but the USB stack is a little bit stateless so we do it at every transaction * if the state of the ed is ED_NEW then a dummy td is added and the state is changed to ED_UNLINK * in all other cases the state is left unchanged * the ed info fields are setted anyway even though most of them should not change */ static ed_t * ep_add_ed (struct usb_device * usb_dev, unsigned int pipe, int interval, int load) { ohci_t * ohci = usb_dev->bus->hcpriv; td_t * td; ed_t * ed_ret; volatile ed_t * ed; spin_lock (&usb_ed_lock); ed = ed_ret = &(usb_to_ohci (usb_dev)->ed[(usb_pipeendpoint (pipe) << 1) | (usb_pipecontrol (pipe)? 0: usb_pipeout (pipe))]); if((ed->state & ED_DEL) || (ed->state & ED_URB_DEL)) return NULL; /* pending delete request */ if (ed->state == ED_NEW) { ed->hwINFO = cpu_to_le32 (OHCI_ED_SKIP); /* skip ed */ OHCI_ALLOC (td, sizeof (*td)); /* dummy td; end of td list for ed */ if(!td) return NULL; /* out of memory */ ed->hwTailP = cpu_to_le32 (virt_to_bus (td)); ed->hwHeadP = ed->hwTailP; ed->state = ED_UNLINK; ed->type = usb_pipetype (pipe); usb_to_ohci (usb_dev)->ed_cnt++; } ohci->dev[usb_pipedevice (pipe)] = usb_dev; ed->hwINFO = cpu_to_le32 (usb_pipedevice (pipe) | usb_pipeendpoint (pipe) << 7 | (usb_pipeisoc (pipe)? 0x8000: 0) | (usb_pipecontrol (pipe)? 0: (usb_pipeout (pipe)? 0x800: 0x1000)) | usb_pipeslow (pipe) << 13 | usb_maxpacket (usb_dev, pipe, usb_pipeout (pipe)) << 16); if (ed->type == INT && ed->state == ED_UNLINK) { ed->int_period = interval; ed->int_load = load; } spin_unlock(&usb_ed_lock); return ed_ret; } /*-------------------------------------------------------------------------*/ /* request the removal of an endpoint * put the ep on the rm_list and request a stop of the bulk or ctrl list * real removal is done at the next start of frame (SOF) hardware interrupt */ static void ep_rm_ed (struct usb_device * usb_dev, ed_t * ed) { unsigned int frame; ohci_t * ohci = usb_dev->bus->hcpriv; if ((ed->state & ED_DEL) || (ed->state & ED_URB_DEL)) return; ed->hwINFO |= cpu_to_le32 (OHCI_ED_SKIP); writel (OHCI_INTR_SF, &ohci->regs->intrstatus); writel (OHCI_INTR_SF, &ohci->regs->intrenable); /* enable sof interrupt */ frame = le16_to_cpu (ohci->hcca.frame_no) & 0x1; ed->ed_rm_list = ohci->ed_rm_list[frame]; ohci->ed_rm_list[frame] = ed; switch (ed->type) { case CTRL: /* stop CTRL list */ writel (ohci->hc_control &= ~OHCI_CTRL_CLE, &ohci->regs->control); break; case BULK: /* stop BULK list */ writel (ohci->hc_control &= ~OHCI_CTRL_BLE, &ohci->regs->control); break; } } /*-------------------------------------------------------------------------* * TD handling functions *-------------------------------------------------------------------------*/ /* prepare a TD */ static void td_fill (unsigned int info, void * data, int len, urb_t * urb, int index) { volatile td_t * td, * td_pt; urb_priv_t * urb_priv = urb->hcpriv; if (index >= urb_priv->length) { err("internal OHCI error: TD index > length"); return; } td_pt = urb_priv->td [index]; /* fill the old dummy TD */ td = urb_priv->td [index] = (td_t *) bus_to_virt (le32_to_cpup (&urb_priv->ed->hwTailP) & 0xfffffff0); td->ed = urb_priv->ed; td->index = index; td->urb = urb; td->hwINFO = cpu_to_le32 (info); if ((td->ed->type & 3) == PIPE_ISOCHRONOUS) { td->hwCBP = cpu_to_le32 (((!data || !len)? 0 : virt_to_bus (data)) & 0xFFFFF000); td->ed->last_iso = info & 0xffff; } else { td->hwCBP = cpu_to_le32 (((!data || !len)? 0 : virt_to_bus (data))); } td->hwBE = cpu_to_le32 ((!data || !len )? 0: virt_to_bus (data + len - 1)); td->hwNextTD = cpu_to_le32 (virt_to_bus (td_pt)); td->hwPSW [0] = cpu_to_le16 ((virt_to_bus (data) & 0x0FFF) | 0xE000); td_pt->hwNextTD = 0; td->ed->hwTailP = td->hwNextTD; td->next_dl_td = NULL; //td_pt; } /*-------------------------------------------------------------------------*/ /* prepare all TDs of a transfer */ static void td_submit_urb (urb_t * urb) { urb_priv_t * urb_priv = urb->hcpriv; ohci_t * ohci = (ohci_t *) urb->dev->bus->hcpriv; void * ctrl = urb->setup_packet; void * data = urb->transfer_buffer; int data_len = urb->transfer_buffer_length; int cnt = 0; __u32 info = 0; unsigned int toggle = 0; /* OHCI handles the DATA-toggles itself, we just use the USB-toggle bits for reseting */ if(usb_gettoggle(urb->dev, usb_pipeendpoint(urb->pipe), usb_pipeout(urb->pipe))) { toggle = TD_T_TOGGLE; } else { toggle = TD_T_DATA0; usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe), usb_pipeout(urb->pipe), 1); } urb_priv->td_cnt = 0; switch (usb_pipetype (urb->pipe)) { case PIPE_BULK: info = usb_pipeout (urb->pipe)? TD_CC | TD_DP_OUT : TD_CC | TD_DP_IN ; while(data_len > 4096) { td_fill (info | (cnt? TD_T_TOGGLE:toggle), data, 4096, urb, cnt); data += 4096; data_len -= 4096; cnt++; } info = usb_pipeout (urb->pipe)? TD_CC | TD_DP_OUT : TD_CC | TD_R | TD_DP_IN ; td_fill (info | (cnt? TD_T_TOGGLE:toggle), data, data_len, urb, cnt); cnt++; writel (OHCI_BLF, &ohci->regs->cmdstatus); /* start bulk list */ break; case PIPE_INTERRUPT: info = usb_pipeout (urb->pipe)? TD_CC | TD_DP_OUT | toggle: TD_CC | TD_R | TD_DP_IN | toggle; td_fill (info, data, data_len, urb, cnt++); break; case PIPE_CONTROL: info = TD_CC | TD_DP_SETUP | TD_T_DATA0; td_fill (info, ctrl, 8, urb, cnt++); if (data_len > 0) { info = usb_pipeout (urb->pipe)? TD_CC | TD_R | TD_DP_OUT | TD_T_DATA1 : TD_CC | TD_R | TD_DP_IN | TD_T_DATA1; td_fill (info, data, data_len, urb, cnt++); } info = usb_pipeout (urb->pipe)? TD_CC | TD_DP_IN | TD_T_DATA1: TD_CC | TD_DP_OUT | TD_T_DATA1; td_fill (info, NULL, 0, urb, cnt++); writel (OHCI_CLF, &ohci->regs->cmdstatus); /* start Control list */ break; case PIPE_ISOCHRONOUS: for (cnt = 0; cnt < urb->number_of_packets; cnt++) { td_fill (TD_CC|TD_ISO | ((urb->start_frame + cnt) & 0xffff), (__u8 *) data + urb->iso_frame_desc[cnt].offset, urb->iso_frame_desc[cnt].length, urb, cnt); } break; } if (urb_priv->length != cnt) dbg("TD LENGTH %d != CNT %d", urb_priv->length, cnt); } /*-------------------------------------------------------------------------* * Done List handling functions *-------------------------------------------------------------------------*/ /* calculate the transfer length and update the urb */ static void dl_transfer_length(td_t * td) { __u32 tdINFO, tdBE, tdCBP; __u16 tdPSW; urb_t * urb = td->urb; urb_priv_t * urb_priv = urb->hcpriv; int dlen = 0; int cc = 0; tdINFO = le32_to_cpup (&td->hwINFO); tdBE = le32_to_cpup (&td->hwBE); tdCBP = le32_to_cpup (&td->hwCBP); if (tdINFO & TD_ISO) { tdPSW = le16_to_cpu (td->hwPSW[0]); cc = (tdPSW >> 12) & 0xF; if (cc < 0xE) { if (usb_pipeout(urb->pipe)) { dlen = urb->iso_frame_desc[td->index].length; } else { dlen = tdPSW & 0x3ff; } urb->actual_length += dlen; urb->iso_frame_desc[td->index].actual_length = dlen; if (!(urb->transfer_flags & USB_DISABLE_SPD) && (cc == TD_DATAUNDERRUN)) cc = TD_CC_NOERROR; urb->iso_frame_desc[td->index].status = cc_to_error[cc]; } } else { /* BULK, INT, CONTROL DATA */ if (!(usb_pipetype (urb->pipe) == PIPE_CONTROL && ((td->index == 0) || (td->index == urb_priv->length - 1)))) { if (tdBE != 0) { if (td->hwCBP == 0) urb->actual_length = bus_to_virt (tdBE) - urb->transfer_buffer + 1; else urb->actual_length = bus_to_virt (tdCBP) - urb->transfer_buffer; } } } } /*-------------------------------------------------------------------------*/ /* replies to the request have to be on a FIFO basis so * we reverse the reversed done-list */ static td_t * dl_reverse_done_list (ohci_t * ohci) { __u32 td_list_hc; td_t * td_rev = NULL; td_t * td_list = NULL; urb_priv_t * urb_priv = NULL; unsigned long flags; spin_lock_irqsave (&usb_ed_lock, flags); td_list_hc = le32_to_cpup (&ohci->hcca.done_head) & 0xfffffff0; ohci->hcca.done_head = 0; while (td_list_hc) { td_list = (td_t *) bus_to_virt (td_list_hc); if (TD_CC_GET (le32_to_cpup (&td_list->hwINFO))) { urb_priv = (urb_priv_t *) td_list->urb->hcpriv; dbg(" USB-error/status: %x : %p", TD_CC_GET (le32_to_cpup (&td_list->hwINFO)), td_list); if (td_list->ed->hwHeadP & cpu_to_le32 (0x1)) { if (urb_priv && ((td_list->index + 1) < urb_priv->length)) { td_list->ed->hwHeadP = (urb_priv->td[urb_priv->length - 1]->hwNextTD & cpu_to_le32 (0xfffffff0)) | (td_list->ed->hwHeadP & cpu_to_le32 (0x2)); urb_priv->td_cnt += urb_priv->length - td_list->index - 1; } else td_list->ed->hwHeadP &= cpu_to_le32 (0xfffffff2); } } td_list->next_dl_td = td_rev; td_rev = td_list; td_list_hc = le32_to_cpup (&td_list->hwNextTD) & 0xfffffff0; } spin_unlock_irqrestore (&usb_ed_lock, flags); return td_list; } /*-------------------------------------------------------------------------*/ /* there are some pending requests to remove * - some of the eds (if ed->state & ED_DEL (set by sohci_free_dev) * - some URBs/TDs if urb_priv->state == URB_DEL */ static void dl_del_list (ohci_t * ohci, unsigned int frame) { unsigned long flags; ed_t * ed; __u32 edINFO; __u32 tdINFO; td_t * td = NULL, * td_next = NULL, * tdHeadP = NULL, * tdTailP; __u32 * td_p; int ctrl = 0, bulk = 0; spin_lock_irqsave (&usb_ed_lock, flags); for (ed = ohci->ed_rm_list[frame]; ed != NULL; ed = ed->ed_rm_list) { tdTailP = bus_to_virt (le32_to_cpup (&ed->hwTailP) & 0xfffffff0); tdHeadP = bus_to_virt (le32_to_cpup (&ed->hwHeadP) & 0xfffffff0); edINFO = le32_to_cpup (&ed->hwINFO); td_p = &ed->hwHeadP; for (td = tdHeadP; td != tdTailP; td = td_next) { urb_t * urb = td->urb; urb_priv_t * urb_priv = td->urb->hcpriv; td_next = bus_to_virt (le32_to_cpup (&td->hwNextTD) & 0xfffffff0); if ((urb_priv->state == URB_DEL) || (ed->state & ED_DEL)) { tdINFO = le32_to_cpup (&td->hwINFO); if (TD_CC_GET (tdINFO) < 0xE) dl_transfer_length (td); *td_p = td->hwNextTD | (*td_p & cpu_to_le32 (0x3)); if(++ (urb_priv->td_cnt) == urb_priv->length) urb_rm_priv (urb); if (urb->transfer_flags & USB_ASYNC_UNLINK) { usb_dec_dev_use (urb->dev); urb->status = -ECONNRESET; urb->complete (urb); } else { wake_up (&op_wakeup); } } else { td_p = &td->hwNextTD; } } if (ed->state & ED_DEL) { /* set by sohci_free_dev */ struct ohci_device * dev = usb_to_ohci (ohci->dev[edINFO & 0x7F]); OHCI_FREE (tdTailP); /* free dummy td */ ed->hwINFO = cpu_to_le32 (OHCI_ED_SKIP); ed->state = ED_NEW; /* if all eds are removed wake up sohci_free_dev */ if (!--dev->ed_cnt) wake_up (&op_wakeup); } else { ed->state &= ~ED_URB_DEL; ed->hwINFO &= ~cpu_to_le32 (OHCI_ED_SKIP); } if ((ed->type & 3) == CTRL) ctrl |= 1; if ((ed->type & 3) == BULK) bulk |= 1; } if (ctrl) writel (0, &ohci->regs->ed_controlcurrent); /* reset CTRL list */ if (bulk) writel (0, &ohci->regs->ed_bulkcurrent); /* reset BULK list */ if (!ohci->ed_rm_list[!frame]) { /* enable CTRL and BULK lists */ ohci->hc_control |= OHCI_CTRL_CLE | OHCI_CTRL_BLE; writel (ohci->hc_control, &ohci->regs->control); } ohci->ed_rm_list[frame] = NULL; spin_unlock_irqrestore (&usb_ed_lock, flags); } /*-------------------------------------------------------------------------*/ /* td done list */ static void dl_done_list (ohci_t * ohci, td_t * td_list) { td_t * td_list_next = NULL; ed_t * ed; int cc = 0; urb_t * urb; urb_priv_t * urb_priv; __u32 tdINFO, edHeadP, edTailP; unsigned long flags; while (td_list) { td_list_next = td_list->next_dl_td; urb = td_list->urb; urb_priv = urb->hcpriv; tdINFO = le32_to_cpup (&td_list->hwINFO); ed = td_list->ed; dl_transfer_length(td_list); /* error code of transfer */ cc = TD_CC_GET (tdINFO); if( cc == TD_CC_STALL) usb_endpoint_halt(urb->dev, usb_pipeendpoint(urb->pipe), usb_pipeout(urb->pipe)); if (!(urb->transfer_flags & USB_DISABLE_SPD) && (cc == TD_DATAUNDERRUN)) cc = TD_CC_NOERROR; if (++(urb_priv->td_cnt) == urb_priv->length) { if (urb_priv->state != URB_DEL && !(ed->state & ED_DEL) && ed->state != ED_NEW) { urb->status = cc_to_error[cc]; sohci_return_urb (urb); } else { urb_rm_priv (urb); } } spin_lock_irqsave (&usb_ed_lock, flags); if (ed->state != ED_NEW) { edHeadP = le32_to_cpup (&ed->hwHeadP) & 0xfffffff0; edTailP = le32_to_cpup (&ed->hwTailP); if((edHeadP == edTailP) && (ed->state == ED_OPER)) ep_unlink (ohci, ed); /* unlink eds if they are not busy */ } spin_unlock_irqrestore (&usb_ed_lock, flags); td_list = td_list_next; } } /*-------------------------------------------------------------------------* * Virtual Root Hub *-------------------------------------------------------------------------*/ /* Device descriptor */ static __u8 root_hub_dev_des[] = { 0x12, /* __u8 bLength; */ 0x01, /* __u8 bDescriptorType; Device */ 0x10, /* __u16 bcdUSB; v1.1 */ 0x01, 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ 0x00, /* __u8 bDeviceSubClass; */ 0x00, /* __u8 bDeviceProtocol; */ 0x08, /* __u8 bMaxPacketSize0; 8 Bytes */ 0x00, /* __u16 idVendor; */ 0x00, 0x00, /* __u16 idProduct; */ 0x00, 0x00, /* __u16 bcdDevice; */ 0x00, 0x00, /* __u8 iManufacturer; */ 0x02, /* __u8 iProduct; */ 0x01, /* __u8 iSerialNumber; */ 0x01 /* __u8 bNumConfigurations; */ }; /* Configuration descriptor */ static __u8 root_hub_config_des[] = { 0x09, /* __u8 bLength; */ 0x02, /* __u8 bDescriptorType; Configuration */ 0x19, /* __u16 wTotalLength; */ 0x00, 0x01, /* __u8 bNumInterfaces; */ 0x01, /* __u8 bConfigurationValue; */ 0x00, /* __u8 iConfiguration; */ 0x40, /* __u8 bmAttributes; Bit 7: Bus-powered, 6: Self-powered, 5 Remote-wakwup, 4..0: resvd */ 0x00, /* __u8 MaxPower; */ /* interface */ 0x09, /* __u8 if_bLength; */ 0x04, /* __u8 if_bDescriptorType; Interface */ 0x00, /* __u8 if_bInterfaceNumber; */ 0x00, /* __u8 if_bAlternateSetting; */ 0x01, /* __u8 if_bNumEndpoints; */ 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ 0x00, /* __u8 if_bInterfaceSubClass; */ 0x00, /* __u8 if_bInterfaceProtocol; */ 0x00, /* __u8 if_iInterface; */ /* endpoint */ 0x07, /* __u8 ep_bLength; */ 0x05, /* __u8 ep_bDescriptorType; Endpoint */ 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ 0x03, /* __u8 ep_bmAttributes; Interrupt */ 0x02, /* __u16 ep_wMaxPacketSize; ((MAX_ROOT_PORTS + 1) / 8 */ 0x00, 0xff /* __u8 ep_bInterval; 255 ms */ }; /* Hub class-specific descriptor is constructed dynamically */ /*-------------------------------------------------------------------------*/ /* prepare Interrupt pipe data; HUB INTERRUPT ENDPOINT */ static int rh_send_irq (ohci_t * ohci, void * rh_data, int rh_len) { int num_ports; int i; int ret; int len; __u8 data[8]; num_ports = readl (&ohci->regs->roothub.a) & RH_A_NDP; if (num_ports > MAX_ROOT_PORTS) { err ("bogus NDP=%d for OHCI %s", num_ports, ohci->ohci_dev->slot_name); err ("rereads as NDP=%d", readl (&ohci->regs->roothub.a) & RH_A_NDP); /* retry later; "should not happen" */ return 0; } *(__u8 *) data = (readl (&ohci->regs->roothub.status) & (RH_HS_LPSC | RH_HS_OCIC)) ? 1: 0; ret = *(__u8 *) data; for ( i = 0; i < num_ports; i++) { *(__u8 *) (data + (i + 1) / 8) |= ((readl (&ohci->regs->roothub.portstatus[i]) & (RH_PS_CSC | RH_PS_PESC | RH_PS_PSSC | RH_PS_OCIC | RH_PS_PRSC)) ? 1: 0) << ((i + 1) % 8); ret += *(__u8 *) (data + (i + 1) / 8); } len = i/8 + 1; if (ret > 0) { memcpy (rh_data, data, min (len, min (rh_len, sizeof(data)))); return len; } return 0; } /*-------------------------------------------------------------------------*/ /* Virtual Root Hub INTs are polled by this timer every "interval" ms */ static void rh_int_timer_do (unsigned long ptr) { int len; urb_t * urb = (urb_t *) ptr; ohci_t * ohci = urb->dev->bus->hcpriv; if (ohci->disabled) return; /* ignore timers firing during PM suspend, etc */ if ((ohci->hc_control & OHCI_CTRL_HCFS) != OHCI_USB_OPER) return; if(ohci->rh.send) { len = rh_send_irq (ohci, urb->transfer_buffer, urb->transfer_buffer_length); if (len > 0) { urb->actual_length = len; #ifdef DEBUG urb_print (urb, "RET-t(rh)", usb_pipeout (urb->pipe)); #endif if (urb->complete) urb->complete (urb); } } rh_init_int_timer (urb); } /*-------------------------------------------------------------------------*/ /* Root Hub INTs are polled by this timer */ static int rh_init_int_timer (urb_t * urb) { ohci_t * ohci = urb->dev->bus->hcpriv; ohci->rh.interval = urb->interval; init_timer (&ohci->rh.rh_int_timer); ohci->rh.rh_int_timer.function = rh_int_timer_do; ohci->rh.rh_int_timer.data = (unsigned long) urb; ohci->rh.rh_int_timer.expires = jiffies + (HZ * (urb->interval < 30? 30: urb->interval)) / 1000; add_timer (&ohci->rh.rh_int_timer); return 0; } /*-------------------------------------------------------------------------*/ #define OK(x) len = (x); break #define WR_RH_STAT(x) writel((x), &ohci->regs->roothub.status) #define WR_RH_PORTSTAT(x) writel((x), &ohci->regs->roothub.portstatus[wIndex-1]) #define RD_RH_STAT readl(&ohci->regs->roothub.status) #define RD_RH_PORTSTAT readl(&ohci->regs->roothub.portstatus[wIndex-1]) /* request to virtual root hub */ static int rh_submit_urb (urb_t * urb) { struct usb_device * usb_dev = urb->dev; ohci_t * ohci = usb_dev->bus->hcpriv; unsigned int pipe = urb->pipe; devrequest * cmd = (devrequest *) urb->setup_packet; void * data = urb->transfer_buffer; int leni = urb->transfer_buffer_length; int len = 0; int status = TD_CC_NOERROR; __u32 datab[4]; __u8 * data_buf = (__u8 *) datab; __u16 bmRType_bReq; __u16 wValue; __u16 wIndex; __u16 wLength; if (usb_pipeint(pipe)) { ohci->rh.urb = urb; ohci->rh.send = 1; ohci->rh.interval = urb->interval; rh_init_int_timer(urb); urb->status = cc_to_error [TD_CC_NOERROR]; return 0; } bmRType_bReq = cmd->requesttype | (cmd->request << 8); wValue = le16_to_cpu (cmd->value); wIndex = le16_to_cpu (cmd->index); wLength = le16_to_cpu (cmd->length); dbg ("rh_submit_urb, req = %d(%x) len=%d", bmRType_bReq, bmRType_bReq, wLength); switch (bmRType_bReq) { /* Request Destination: without flags: Device, RH_INTERFACE: interface, RH_ENDPOINT: endpoint, RH_CLASS means HUB here, RH_OTHER | RH_CLASS almost ever means HUB_PORT here */ case RH_GET_STATUS: *(__u16 *) data_buf = cpu_to_le16 (1); OK (2); case RH_GET_STATUS | RH_INTERFACE: *(__u16 *) data_buf = cpu_to_le16 (0); OK (2); case RH_GET_STATUS | RH_ENDPOINT: *(__u16 *) data_buf = cpu_to_le16 (0); OK (2); case RH_GET_STATUS | RH_CLASS: *(__u32 *) data_buf = cpu_to_le32 ( RD_RH_STAT & ~(RH_HS_CRWE | RH_HS_DRWE)); OK (4); case RH_GET_STATUS | RH_OTHER | RH_CLASS: *(__u32 *) data_buf = cpu_to_le32 (RD_RH_PORTSTAT); OK (4); case RH_CLEAR_FEATURE | RH_ENDPOINT: switch (wValue) { case (RH_ENDPOINT_STALL): OK (0); } break; case RH_CLEAR_FEATURE | RH_CLASS: switch (wValue) { case RH_C_HUB_LOCAL_POWER: OK(0); case (RH_C_HUB_OVER_CURRENT): WR_RH_STAT(RH_HS_OCIC); OK (0); } break; case RH_CLEAR_FEATURE | RH_OTHER | RH_CLASS: switch (wValue) { case (RH_PORT_ENABLE): WR_RH_PORTSTAT (RH_PS_CCS ); OK (0); case (RH_PORT_SUSPEND): WR_RH_PORTSTAT (RH_PS_POCI); OK (0); case (RH_PORT_POWER): WR_RH_PORTSTAT (RH_PS_LSDA); OK (0); case (RH_C_PORT_CONNECTION): WR_RH_PORTSTAT (RH_PS_CSC ); OK (0); case (RH_C_PORT_ENABLE): WR_RH_PORTSTAT (RH_PS_PESC); OK (0); case (RH_C_PORT_SUSPEND): WR_RH_PORTSTAT (RH_PS_PSSC); OK (0); case (RH_C_PORT_OVER_CURRENT): WR_RH_PORTSTAT (RH_PS_OCIC); OK (0); case (RH_C_PORT_RESET): WR_RH_PORTSTAT (RH_PS_PRSC); OK (0); } break; case RH_SET_FEATURE | RH_OTHER | RH_CLASS: switch (wValue) { case (RH_PORT_SUSPEND): WR_RH_PORTSTAT (RH_PS_PSS ); OK (0); case (RH_PORT_RESET): /* BUG IN HUP CODE *********/ if (RD_RH_PORTSTAT & RH_PS_CCS) WR_RH_PORTSTAT (RH_PS_PRS); OK (0); case (RH_PORT_POWER): WR_RH_PORTSTAT (RH_PS_PPS ); OK (0); case (RH_PORT_ENABLE): /* BUG IN HUP CODE *********/ if (RD_RH_PORTSTAT & RH_PS_CCS) WR_RH_PORTSTAT (RH_PS_PES ); OK (0); } break; case RH_SET_ADDRESS: ohci->rh.devnum = wValue; OK(0); case RH_GET_DESCRIPTOR: switch ((wValue & 0xff00) >> 8) { case (0x01): /* device descriptor */ len = min (leni, min (sizeof (root_hub_dev_des), wLength)); data_buf = root_hub_dev_des; OK(len); case (0x02): /* configuration descriptor */ len = min (leni, min (sizeof (root_hub_config_des), wLength)); data_buf = root_hub_config_des; OK(len); case (0x03): /* string descriptors */ len = usb_root_hub_string (wValue & 0xff, (int)(long) ohci->regs, "OHCI", data, wLength); if (len > 0) { data_buf = data; OK (min (leni, len)); } // else fallthrough default: status = TD_CC_STALL; } break; case RH_GET_DESCRIPTOR | RH_CLASS: { __u32 temp = readl (&ohci->regs->roothub.a); data_buf [0] = 9; // min length; data_buf [1] = 0x29; data_buf [2] = temp & RH_A_NDP; data_buf [3] = 0; if (temp & RH_A_PSM) /* per-port power switching? */ data_buf [3] |= 0x1; if (temp & RH_A_NOCP) /* no overcurrent reporting? */ data_buf [3] |= 0x10; else if (temp & RH_A_OCPM) /* per-port overcurrent reporting? */ data_buf [3] |= 0x8; datab [1] = 0; data_buf [5] = (temp & RH_A_POTPGT) >> 24; temp = readl (&ohci->regs->roothub.b); data_buf [7] = temp & RH_B_DR; if (data_buf [2] < 7) { data_buf [8] = 0xff; } else { data_buf [0] += 2; data_buf [8] = (temp & RH_B_DR) >> 8; data_buf [10] = data_buf [9] = 0xff; } len = min (leni, min (data_buf [0], wLength)); OK (len); } case RH_GET_CONFIGURATION: *(__u8 *) data_buf = 0x01; OK (1); case RH_SET_CONFIGURATION: WR_RH_STAT (0x10000); OK (0); default: dbg ("unsupported root hub command"); status = TD_CC_STALL; } #ifdef DEBUG ohci_dump_roothub (ohci, 0); #endif len = min(len, leni); if (data != data_buf) memcpy (data, data_buf, len); urb->actual_length = len; urb->status = cc_to_error [status]; #ifdef DEBUG urb_print (urb, "RET(rh)", usb_pipeout (urb->pipe)); #endif if (urb->complete) urb->complete (urb); return 0; } /*-------------------------------------------------------------------------*/ static int rh_unlink_urb (urb_t * urb) { ohci_t * ohci = urb->dev->bus->hcpriv; if (ohci->rh.urb == urb) { ohci->rh.send = 0; del_timer (&ohci->rh.rh_int_timer); } return 0; } /*-------------------------------------------------------------------------* * HC functions *-------------------------------------------------------------------------*/ /* reset the HC and BUS */ static int hc_reset (ohci_t * ohci) { int timeout = 30; int smm_timeout = 50; /* 0,5 sec */ if (readl (&ohci->regs->control) & OHCI_CTRL_IR) { /* SMM owns the HC */ writel (OHCI_OCR, &ohci->regs->cmdstatus); /* request ownership */ dbg("USB HC TakeOver from SMM"); while (readl (&ohci->regs->control) & OHCI_CTRL_IR) { wait_ms (10); if (--smm_timeout == 0) { err("USB HC TakeOver failed!"); return -1; } } } /* Disable HC interrupts */ writel (OHCI_INTR_MIE, &ohci->regs->intrdisable); dbg("USB HC reset_hc %s: ctrl = %x ;", ohci->ohci_dev->slot_name, readl (&ohci->regs->control)); /* Reset USB (needed by some controllers) */ writel (0, &ohci->regs->control); /* HC Reset requires max 10 ms delay */ writel (OHCI_HCR, &ohci->regs->cmdstatus); while ((readl (&ohci->regs->cmdstatus) & OHCI_HCR) != 0) { if (--timeout == 0) { err("USB HC reset timed out!"); return -1; } udelay (1); } ohci->disabled = 0; return 0; } /*-------------------------------------------------------------------------*/ /* Start an OHCI controller, set the BUS operational * enable interrupts * connect the virtual root hub */ static int hc_start (ohci_t * ohci) { __u32 mask; unsigned int fminterval; struct usb_device * usb_dev; struct ohci_device * dev; /* Tell the controller where the control and bulk lists are * The lists are empty now. */ writel (0, &ohci->regs->ed_controlhead); writel (0, &ohci->regs->ed_bulkhead); writel (virt_to_bus (&ohci->hcca), &ohci->regs->hcca); /* a reset clears this */ fminterval = 0x2edf; writel ((fminterval * 9) / 10, &ohci->regs->periodicstart); fminterval |= ((((fminterval - 210) * 6) / 7) << 16); writel (fminterval, &ohci->regs->fminterval); writel (0x628, &ohci->regs->lsthresh); /* start controller operations */ ohci->hc_control = OHCI_CONTROL_INIT | OHCI_USB_OPER; writel (ohci->hc_control, &ohci->regs->control); /* Choose the interrupts we care about now, others later on demand */ mask = OHCI_INTR_MIE | OHCI_INTR_UE | OHCI_INTR_WDH | OHCI_INTR_SO; writel (mask, &ohci->regs->intrenable); writel (mask, &ohci->regs->intrstatus); #ifdef OHCI_USE_NPS writel ((readl(&ohci->regs->roothub.a) | RH_A_NPS) & ~RH_A_PSM, &ohci->regs->roothub.a); writel (RH_HS_LPSC, &ohci->regs->roothub.status); // POTPGT delay is bits 24-31, in 2 ms units. mdelay ((readl(&ohci->regs->roothub.a) >> 23) & 0x1fe); #endif /* OHCI_USE_NPS */ /* connect the virtual root hub */ ohci->rh.devnum = 0; usb_dev = usb_alloc_dev (NULL, ohci->bus); if (!usb_dev) return -ENOMEM; dev = usb_to_ohci (usb_dev); ohci->bus->root_hub = usb_dev; usb_connect (usb_dev); if (usb_new_device (usb_dev) != 0) { usb_free_dev (usb_dev); return -ENODEV; } return 0; } /*-------------------------------------------------------------------------*/ /* an interrupt happens */ static void hc_interrupt (int irq, void * __ohci, struct pt_regs * r) { ohci_t * ohci = __ohci; struct ohci_regs * regs = ohci->regs; int ints; if ((ohci->hcca.done_head != 0) && !(le32_to_cpup (&ohci->hcca.done_head) & 0x01)) { ints = OHCI_INTR_WDH; } else if ((ints = (readl (®s->intrstatus) & readl (®s->intrenable))) == 0) { return; } // dbg("Interrupt: %x frame: %x", ints, le16_to_cpu (ohci->hcca.frame_no)); if (ints & OHCI_INTR_UE) { ohci->disabled++; err ("OHCI Unrecoverable Error, controller %s disabled", ohci->ohci_dev->slot_name); // e.g. due to PCI Master/Target Abort #ifndef DEBUG // FIXME: be optimistic, hope that bug won't repeat often. // Make some non-interrupt context restart the controller. // Count and limit the retries though; either hardware or // software errors can go forever... #endif } if (ints & OHCI_INTR_WDH) { writel (OHCI_INTR_WDH, ®s->intrdisable); dl_done_list (ohci, dl_reverse_done_list (ohci)); writel (OHCI_INTR_WDH, ®s->intrenable); } if (ints & OHCI_INTR_SO) { dbg("USB Schedule overrun"); writel (OHCI_INTR_SO, ®s->intrenable); } if (ints & OHCI_INTR_SF) { unsigned int frame = le16_to_cpu (ohci->hcca.frame_no) & 1; writel (OHCI_INTR_SF, ®s->intrdisable); if (ohci->ed_rm_list[!frame] != NULL) { dl_del_list (ohci, !frame); } if (ohci->ed_rm_list[frame] != NULL) writel (OHCI_INTR_SF, ®s->intrenable); } writel (ints, ®s->intrstatus); writel (OHCI_INTR_MIE, ®s->intrenable); } /*-------------------------------------------------------------------------*/ /* reinitialize after controller reset */ static void hc_reinit_ohci (ohci_t *ohci) { int i; /* for load balancing of the interrupt branches */ for (i = 0; i < NUM_INTS; i++) ohci->ohci_int_load[i] = 0; for (i = 0; i < NUM_INTS; i++) ohci->hcca.int_table[i] = 0; ohci->ed_rm_list [0] = NULL; ohci->ed_rm_list [1] = NULL; /* end of control and bulk lists */ ohci->ed_isotail = NULL; ohci->ed_controltail = NULL; ohci->ed_bulktail = NULL; } /* allocate OHCI */ static ohci_t * hc_alloc_ohci (void * mem_base) { ohci_t * ohci; struct usb_bus * bus; ohci = (ohci_t *) __get_free_pages (GFP_KERNEL, 1); if (!ohci) return NULL; memset (ohci, 0, sizeof (ohci_t)); ohci->irq = -1; ohci->regs = mem_base; bus = usb_alloc_bus (&sohci_device_operations); if (!bus) { free_pages ((unsigned long) ohci, 1); return NULL; } ohci->bus = bus; bus->hcpriv = (void *) ohci; return ohci; } /*-------------------------------------------------------------------------*/ /* De-allocate all resources.. */ static void hc_release_ohci (ohci_t * ohci) { dbg ("USB HC release ohci %s", ohci->ohci_dev->slot_name); /* disconnect all devices */ if (ohci->bus->root_hub) usb_disconnect (&ohci->bus->root_hub); if (!ohci->disabled) hc_reset (ohci); if (ohci->irq >= 0) { free_irq (ohci->irq, ohci); ohci->irq = -1; } ohci->ohci_dev->driver_data = 0; usb_deregister_bus (ohci->bus); usb_free_bus (ohci->bus); /* unmap the IO address space */ iounmap (ohci->regs); free_pages ((unsigned long) ohci, 1); } /*-------------------------------------------------------------------------*/ /* Increment the module usage count, start the control thread and * return success. */ static int hc_found_ohci (struct pci_dev *dev, int irq, void * mem_base) { ohci_t * ohci; char buf[8], *bufp = buf; #ifndef __sparc__ sprintf(buf, "%d", irq); #else bufp = __irq_itoa(irq); #endif printk(KERN_INFO __FILE__ ": USB OHCI at membase 0x%lx, IRQ %s\n", (unsigned long) mem_base, bufp); printk(KERN_INFO __FILE__ ": pci slot %s, %s\n", dev->slot_name, dev->name); ohci = hc_alloc_ohci (mem_base); if (!ohci) { return -ENOMEM; } ohci->ohci_dev = dev; dev->driver_data = ohci; INIT_LIST_HEAD (&ohci->ohci_hcd_list); list_add (&ohci->ohci_hcd_list, &ohci_hcd_list); if (hc_reset (ohci) < 0) { hc_release_ohci (ohci); return -ENODEV; } writel (ohci->hc_control = OHCI_USB_RESET, &ohci->regs->control); wait_ms (10); usb_register_bus (ohci->bus); if (request_irq (irq, hc_interrupt, SA_SHIRQ, "usb-ohci", ohci) == 0) { struct pm_dev *pmdev; ohci->irq = irq; hc_start (ohci); pmdev = pm_register (PM_PCI_DEV, PM_PCI_ID(dev), handle_pm_event); if (pmdev) pmdev->data = ohci; #ifdef DEBUG ohci_dump (ohci, 1); #endif return 0; } err("request interrupt %d failed", irq); hc_release_ohci (ohci); return -EBUSY; } /*-------------------------------------------------------------------------*/ static int hc_start_ohci (struct pci_dev * dev) { unsigned long mem_base; if (pci_enable_device(dev) < 0) return -ENODEV; pci_set_master (dev); mem_base = pci_resource_start(dev, 0); mem_base = (unsigned long) ioremap_nocache (mem_base, 4096); if (!mem_base) { err("Error mapping OHCI memory"); return -EFAULT; } return hc_found_ohci (dev, dev->irq, (void *) mem_base); } /*-------------------------------------------------------------------------*/ #ifdef CONFIG_PMAC_PBOOK /* On Powerbooks, put the controller into suspend mode when going * to sleep, and do a resume when waking up. */ static int ohci_sleep_notify (struct pmu_sleep_notifier * self, int when) { struct list_head * ohci_l; ohci_t * ohci; for (ohci_l = ohci_hcd_list.next; ohci_l != &ohci_hcd_list; ohci_l = ohci_l->next) { ohci = list_entry (ohci_l, ohci_t, ohci_hcd_list); switch (when) { case PBOOK_SLEEP_NOW: disable_irq (ohci->irq); writel (ohci->hc_control = OHCI_USB_SUSPEND, &ohci->regs->control); wait_ms (10); break; case PBOOK_WAKE: writel (ohci->hc_control = OHCI_USB_RESUME, &ohci->regs->control); wait_ms (20); ohci->hc_control = OHCI_CONTROL_INIT | OHCI_USB_OPER; writel (ohci->hc_control, &ohci->regs->control); enable_irq (ohci->irq); break; } } return PBOOK_SLEEP_OK; } static struct pmu_sleep_notifier ohci_sleep_notifier = { ohci_sleep_notify, SLEEP_LEVEL_MISC, }; #endif /* CONFIG_PMAC_PBOOK */ /*-------------------------------------------------------------------------*/ static int handle_pm_event (struct pm_dev *dev, pm_request_t rqst, void *data) { ohci_t * ohci = (ohci_t*) dev->data; int temp = 0; if (ohci) { switch (rqst) { case PM_SUSPEND: /* act as if usb suspend can always be used */ dbg("USB suspend: %s", ohci->ohci_dev->slot_name); ohci->hc_control = OHCI_USB_SUSPEND; writel (ohci->hc_control, &ohci->regs->control); wait_ms (10); break; case PM_RESUME: /* did we suspend, or were we powered off? */ ohci->hc_control = readl (&ohci->regs->control); temp = ohci->hc_control & OHCI_CTRL_HCFS; switch (temp) { case OHCI_USB_RESET: // lost power dbg("USB reset: %s", ohci->ohci_dev->slot_name); ohci->disabled = 1; if (ohci->bus->root_hub) usb_disconnect (&ohci->bus->root_hub); hc_reinit_ohci (ohci); if ((temp = hc_reset (ohci)) < 0 || (temp = hc_start (ohci)) < 0) { ohci->disabled = 1; err ("can't restart %s, %d", ohci->ohci_dev->slot_name, temp); } dbg ("reset done"); break; case OHCI_USB_SUSPEND: // host wakeup case OHCI_USB_RESUME: // remote wakeup dbg("USB resume: %s", ohci->ohci_dev->slot_name); ohci->hc_control = OHCI_USB_RESUME; writel (ohci->hc_control, &ohci->regs->control); wait_ms (20); ohci->hc_control = OHCI_CONTROL_INIT | OHCI_USB_OPER; writel (ohci->hc_control, &ohci->regs->control); break; default: warn ("odd PM_RESUME"); } break; } } return 0; } /*-------------------------------------------------------------------------*/ #define PCI_CLASS_SERIAL_USB_OHCI 0x0C0310 int ohci_hcd_init (void) { int ret = -ENODEV; struct pci_dev * dev = NULL; while ((dev = pci_find_class (PCI_CLASS_SERIAL_USB_OHCI, dev))) { if (hc_start_ohci(dev) >= 0) ret = 0; } #ifdef CONFIG_PMAC_PBOOK pmu_register_sleep_notifier (&ohci_sleep_notifier); #endif return ret; } /*-------------------------------------------------------------------------*/ #ifdef MODULE int init_module (void) { return ohci_hcd_init (); } /*-------------------------------------------------------------------------*/ void cleanup_module (void) { ohci_t * ohci; pm_unregister_all (handle_pm_event); #ifdef CONFIG_PMAC_PBOOK pmu_unregister_sleep_notifier (&ohci_sleep_notifier); #endif while (!list_empty (&ohci_hcd_list)) { ohci = list_entry (ohci_hcd_list.next, ohci_t, ohci_hcd_list); list_del (&ohci->ohci_hcd_list); INIT_LIST_HEAD (&ohci->ohci_hcd_list); hc_release_ohci (ohci); } } #endif //MODULE