X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=drivers%2Fusb%2Fhost%2Fuhci-hcd.c;h=e0d4c2358b39653dc52fb06fde98e12d312a1775;hb=refs%2Fheads%2Fvserver;hp=dfe121d3588723b87bcfd891bcc9c908ff364392;hpb=76828883507a47dae78837ab5dec5a5b4513c667;p=linux-2.6.git diff --git a/drivers/usb/host/uhci-hcd.c b/drivers/usb/host/uhci-hcd.c index dfe121d35..e0d4c2358 100644 --- a/drivers/usb/host/uhci-hcd.c +++ b/drivers/usb/host/uhci-hcd.c @@ -13,7 +13,7 @@ * (C) Copyright 2000 Yggdrasil Computing, Inc. (port of new PCI interface * support from usb-ohci.c by Adam Richter, adam@yggdrasil.com). * (C) Copyright 1999 Gregory P. Smith (from usb-ohci.c) - * (C) Copyright 2004-2005 Alan Stern, stern@rowland.harvard.edu + * (C) Copyright 2004-2006 Alan Stern, stern@rowland.harvard.edu * * Intel documents this fairly well, and as far as I know there * are no royalties or anything like that, but even so there are @@ -22,7 +22,6 @@ * */ -#include #include #include #include @@ -31,7 +30,6 @@ #include #include #include -#include #include #include #include @@ -42,6 +40,7 @@ #include #include #include +#include #include #include @@ -50,16 +49,22 @@ #include "../core/hcd.h" #include "uhci-hcd.h" +#include "pci-quirks.h" /* * Version Information */ -#define DRIVER_VERSION "v2.3" +#define DRIVER_VERSION "v3.0" #define DRIVER_AUTHOR "Linus 'Frodo Rabbit' Torvalds, Johannes Erdfelt, \ Randy Dunlap, Georg Acher, Deti Fliegl, Thomas Sailer, Roman Weissgaerber, \ Alan Stern" #define DRIVER_DESC "USB Universal Host Controller Interface driver" +/* for flakey hardware, ignore overcurrent indicators */ +static int ignore_oc; +module_param(ignore_oc, bool, S_IRUGO); +MODULE_PARM_DESC(ignore_oc, "ignore hardware overcurrent indications"); + /* * debug = 0, no debugging messages * debug = 1, dump failed URBs except for stalls @@ -68,37 +73,29 @@ Alan Stern" * debug = 3, show all TDs in URBs when dumping */ #ifdef DEBUG +#define DEBUG_CONFIGURED 1 static int debug = 1; -#else -static int debug = 0; -#endif module_param(debug, int, S_IRUGO | S_IWUSR); MODULE_PARM_DESC(debug, "Debug level"); + +#else +#define DEBUG_CONFIGURED 0 +#define debug 0 +#endif + static char *errbuf; #define ERRBUF_LEN (32 * 1024) -static kmem_cache_t *uhci_up_cachep; /* urb_priv */ +static struct kmem_cache *uhci_up_cachep; /* urb_priv */ static void suspend_rh(struct uhci_hcd *uhci, enum uhci_rh_state new_state); static void wakeup_rh(struct uhci_hcd *uhci); static void uhci_get_current_frame_number(struct uhci_hcd *uhci); -/* If a transfer is still active after this much time, turn off FSBR */ -#define IDLE_TIMEOUT msecs_to_jiffies(50) -#define FSBR_DELAY msecs_to_jiffies(50) - -/* When we timeout an idle transfer for FSBR, we'll switch it over to */ -/* depth first traversal. We'll do it in groups of this number of TDs */ -/* to make sure it doesn't hog all of the bandwidth */ -#define DEPTH_INTERVAL 5 - #include "uhci-debug.c" #include "uhci-q.c" #include "uhci-hub.c" -extern void uhci_reset_hc(struct pci_dev *pdev, unsigned long base); -extern int uhci_check_and_reset_hc(struct pci_dev *pdev, unsigned long base); - /* * Finish up a host controller reset and update the recorded state. */ @@ -113,28 +110,34 @@ static void finish_reset(struct uhci_hcd *uhci) for (port = 0; port < uhci->rh_numports; ++port) outw(0, uhci->io_addr + USBPORTSC1 + (port * 2)); - uhci->port_c_suspend = uhci->suspended_ports = - uhci->resuming_ports = 0; + uhci->port_c_suspend = uhci->resuming_ports = 0; uhci->rh_state = UHCI_RH_RESET; uhci->is_stopped = UHCI_IS_STOPPED; uhci_to_hcd(uhci)->state = HC_STATE_HALT; uhci_to_hcd(uhci)->poll_rh = 0; + + uhci->dead = 0; /* Full reset resurrects the controller */ } /* * Last rites for a defunct/nonfunctional controller * or one we don't want to use any more. */ -static void hc_died(struct uhci_hcd *uhci) +static void uhci_hc_died(struct uhci_hcd *uhci) { + uhci_get_current_frame_number(uhci); uhci_reset_hc(to_pci_dev(uhci_dev(uhci)), uhci->io_addr); finish_reset(uhci); - uhci->hc_inaccessible = 1; + uhci->dead = 1; + + /* The current frame may already be partway finished */ + ++uhci->frame_number; } /* - * Initialize a controller that was newly discovered or has just been - * resumed. In either case we can't be sure of its previous state. + * Initialize a controller that was newly discovered or has lost power + * or otherwise been reset while it was suspended. In none of these cases + * can we be sure of its previous state. */ static void check_and_reset_hc(struct uhci_hcd *uhci) { @@ -154,7 +157,8 @@ static void configure_hc(struct uhci_hcd *uhci) outl(uhci->frame_dma_handle, uhci->io_addr + USBFLBASEADD); /* Set the current frame number */ - outw(uhci->frame_number, uhci->io_addr + USBFRNUM); + outw(uhci->frame_number & UHCI_MAX_SOF_NUMBER, + uhci->io_addr + USBFRNUM); /* Mark controller as not halted before we enable interrupts */ uhci_to_hcd(uhci)->state = HC_STATE_SUSPENDED; @@ -170,6 +174,11 @@ static int resume_detect_interrupts_are_broken(struct uhci_hcd *uhci) { int port; + /* If we have to ignore overcurrent events then almost by definition + * we can't depend on resume-detect interrupts. */ + if (ignore_oc) + return 1; + switch (to_pci_dev(uhci_dev(uhci))->vendor) { default: break; @@ -198,15 +207,38 @@ static int resume_detect_interrupts_are_broken(struct uhci_hcd *uhci) return 0; } +static int remote_wakeup_is_broken(struct uhci_hcd *uhci) +{ + int port; + char *sys_info; + static char bad_Asus_board[] = "A7V8X"; + + /* One of Asus's motherboards has a bug which causes it to + * wake up immediately from suspend-to-RAM if any of the ports + * are connected. In such cases we will not set EGSM. + */ + sys_info = dmi_get_system_info(DMI_BOARD_NAME); + if (sys_info && !strcmp(sys_info, bad_Asus_board)) { + for (port = 0; port < uhci->rh_numports; ++port) { + if (inw(uhci->io_addr + USBPORTSC1 + port * 2) & + USBPORTSC_CCS) + return 1; + } + } + + return 0; +} + static void suspend_rh(struct uhci_hcd *uhci, enum uhci_rh_state new_state) __releases(uhci->lock) __acquires(uhci->lock) { int auto_stop; - int int_enable; + int int_enable, egsm_enable; auto_stop = (new_state == UHCI_RH_AUTO_STOPPED); - dev_dbg(uhci_dev(uhci), "%s%s\n", __FUNCTION__, + dev_dbg(&uhci_to_hcd(uhci)->self.root_hub->dev, + "%s%s\n", __FUNCTION__, (auto_stop ? " (auto-stop)" : "")); /* If we get a suspend request when we're already auto-stopped @@ -218,15 +250,20 @@ __acquires(uhci->lock) } /* Enable resume-detect interrupts if they work. - * Then enter Global Suspend mode, still configured. + * Then enter Global Suspend mode if _it_ works, still configured. */ + egsm_enable = USBCMD_EGSM; uhci->working_RD = 1; int_enable = USBINTR_RESUME; - if (resume_detect_interrupts_are_broken(uhci)) { + if (remote_wakeup_is_broken(uhci)) + egsm_enable = 0; + if (resume_detect_interrupts_are_broken(uhci) || !egsm_enable || + !device_may_wakeup( + &uhci_to_hcd(uhci)->self.root_hub->dev)) uhci->working_RD = int_enable = 0; - } + outw(int_enable, uhci->io_addr + USBINTR); - outw(USBCMD_EGSM | USBCMD_CF, uhci->io_addr + USBCMD); + outw(egsm_enable | USBCMD_CF, uhci->io_addr + USBCMD); mb(); udelay(5); @@ -240,27 +277,27 @@ __acquires(uhci->lock) spin_unlock_irq(&uhci->lock); msleep(1); spin_lock_irq(&uhci->lock); - if (uhci->hc_inaccessible) /* Died */ + if (uhci->dead) return; } if (!(inw(uhci->io_addr + USBSTS) & USBSTS_HCH)) - dev_warn(uhci_dev(uhci), "Controller not stopped yet!\n"); + dev_warn(&uhci_to_hcd(uhci)->self.root_hub->dev, + "Controller not stopped yet!\n"); uhci_get_current_frame_number(uhci); - smp_wmb(); uhci->rh_state = new_state; uhci->is_stopped = UHCI_IS_STOPPED; uhci_to_hcd(uhci)->poll_rh = !int_enable; - uhci_scan_schedule(uhci, NULL); + uhci_scan_schedule(uhci); + uhci_fsbr_off(uhci); } static void start_rh(struct uhci_hcd *uhci) { uhci_to_hcd(uhci)->state = HC_STATE_RUNNING; uhci->is_stopped = 0; - smp_wmb(); /* Mark it configured and running with a 64-byte max packet. * All interrupts are enabled, even though RESUME won't do anything. @@ -277,7 +314,8 @@ static void wakeup_rh(struct uhci_hcd *uhci) __releases(uhci->lock) __acquires(uhci->lock) { - dev_dbg(uhci_dev(uhci), "%s%s\n", __FUNCTION__, + dev_dbg(&uhci_to_hcd(uhci)->self.root_hub->dev, + "%s%s\n", __FUNCTION__, uhci->rh_state == UHCI_RH_AUTO_STOPPED ? " (auto-start)" : ""); @@ -292,7 +330,7 @@ __acquires(uhci->lock) spin_unlock_irq(&uhci->lock); msleep(20); spin_lock_irq(&uhci->lock); - if (uhci->hc_inaccessible) /* Died */ + if (uhci->dead) return; /* End Global Resume and wait for EOP to be sent */ @@ -309,7 +347,7 @@ __acquires(uhci->lock) mod_timer(&uhci_to_hcd(uhci)->rh_timer, jiffies); } -static irqreturn_t uhci_irq(struct usb_hcd *hcd, struct pt_regs *regs) +static irqreturn_t uhci_irq(struct usb_hcd *hcd) { struct uhci_hcd *uhci = hcd_to_uhci(hcd); unsigned short status; @@ -338,7 +376,13 @@ static irqreturn_t uhci_irq(struct usb_hcd *hcd, struct pt_regs *regs) dev_err(uhci_dev(uhci), "host controller halted, " "very bad!\n"); - hc_died(uhci); + if (debug > 1 && errbuf) { + /* Print the schedule for debugging */ + uhci_sprint_schedule(uhci, + errbuf, ERRBUF_LEN); + lprintk(errbuf); + } + uhci_hc_died(uhci); /* Force a callback in case there are * pending unlinks */ @@ -352,7 +396,7 @@ static irqreturn_t uhci_irq(struct usb_hcd *hcd, struct pt_regs *regs) usb_hcd_poll_rh_status(hcd); else { spin_lock_irqsave(&uhci->lock, flags); - uhci_scan_schedule(uhci, regs); + uhci_scan_schedule(uhci); spin_unlock_irqrestore(&uhci->lock, flags); } @@ -361,12 +405,21 @@ static irqreturn_t uhci_irq(struct usb_hcd *hcd, struct pt_regs *regs) /* * Store the current frame number in uhci->frame_number if the controller - * is runnning + * is runnning. Expand from 11 bits (of which we use only 10) to a + * full-sized integer. + * + * Like many other parts of the driver, this code relies on being polled + * more than once per second as long as the controller is running. */ static void uhci_get_current_frame_number(struct uhci_hcd *uhci) { - if (!uhci->is_stopped) - uhci->frame_number = inw(uhci->io_addr + USBFRNUM); + if (!uhci->is_stopped) { + unsigned delta; + + delta = (inw(uhci->io_addr + USBFRNUM) - uhci->frame_number) & + (UHCI_NUMFRAMES - 1); + uhci->frame_number += delta; + } } /* @@ -376,6 +429,14 @@ static void release_uhci(struct uhci_hcd *uhci) { int i; + if (DEBUG_CONFIGURED) { + spin_lock_irq(&uhci->lock); + uhci->is_initialized = 0; + spin_unlock_irq(&uhci->lock); + + debugfs_remove(uhci->dentry); + } + for (i = 0; i < UHCI_NUM_SKELQH; i++) uhci_free_qh(uhci, uhci->skelqh[i]); @@ -390,11 +451,9 @@ static void release_uhci(struct uhci_hcd *uhci) dma_free_coherent(uhci_dev(uhci), UHCI_NUMFRAMES * sizeof(*uhci->frame), uhci->frame, uhci->frame_dma_handle); - - debugfs_remove(uhci->dentry); } -static int uhci_reset(struct usb_hcd *hcd) +static int uhci_init(struct usb_hcd *hcd) { struct uhci_hcd *uhci = hcd_to_uhci(hcd); unsigned io_size = (unsigned) hcd->rsrc_len; @@ -446,7 +505,7 @@ static void uhci_shutdown(struct pci_dev *pdev) { struct usb_hcd *hcd = (struct usb_hcd *) pci_get_drvdata(pdev); - hc_died(hcd_to_uhci(hcd)); + uhci_hc_died(hcd_to_uhci(hcd)); } /* @@ -474,33 +533,25 @@ static int uhci_start(struct usb_hcd *hcd) hcd->uses_new_polling = 1; - dentry = debugfs_create_file(hcd->self.bus_name, - S_IFREG|S_IRUGO|S_IWUSR, uhci_debugfs_root, uhci, - &uhci_debug_operations); - if (!dentry) { - dev_err(uhci_dev(uhci), - "couldn't create uhci debugfs entry\n"); - retval = -ENOMEM; - goto err_create_debug_entry; - } - uhci->dentry = dentry; - - uhci->fsbr = 0; - uhci->fsbrtimeout = 0; - spin_lock_init(&uhci->lock); - INIT_LIST_HEAD(&uhci->qh_remove_list); - - INIT_LIST_HEAD(&uhci->td_remove_list); - - INIT_LIST_HEAD(&uhci->urb_remove_list); - - INIT_LIST_HEAD(&uhci->urb_list); - - INIT_LIST_HEAD(&uhci->complete_list); - + setup_timer(&uhci->fsbr_timer, uhci_fsbr_timeout, + (unsigned long) uhci); + INIT_LIST_HEAD(&uhci->idle_qh_list); init_waitqueue_head(&uhci->waitqh); + if (DEBUG_CONFIGURED) { + dentry = debugfs_create_file(hcd->self.bus_name, + S_IFREG|S_IRUGO|S_IWUSR, uhci_debugfs_root, + uhci, &uhci_debug_operations); + if (!dentry) { + dev_err(uhci_dev(uhci), "couldn't create uhci " + "debugfs entry\n"); + retval = -ENOMEM; + goto err_create_debug_entry; + } + uhci->dentry = dentry; + } + uhci->frame = dma_alloc_coherent(uhci_dev(uhci), UHCI_NUMFRAMES * sizeof(*uhci->frame), &uhci->frame_dma_handle, 0); @@ -540,7 +591,7 @@ static int uhci_start(struct usb_hcd *hcd) } for (i = 0; i < UHCI_NUM_SKELQH; i++) { - uhci->skelqh[i] = uhci_alloc_qh(uhci); + uhci->skelqh[i] = uhci_alloc_qh(uhci, NULL, NULL); if (!uhci->skelqh[i]) { dev_err(uhci_dev(uhci), "unable to allocate QH\n"); goto err_alloc_skelqh; @@ -557,13 +608,17 @@ static int uhci_start(struct usb_hcd *hcd) uhci->skel_int16_qh->link = uhci->skel_int8_qh->link = uhci->skel_int4_qh->link = - uhci->skel_int2_qh->link = - cpu_to_le32(uhci->skel_int1_qh->dma_handle) | UHCI_PTR_QH; - uhci->skel_int1_qh->link = cpu_to_le32(uhci->skel_ls_control_qh->dma_handle) | UHCI_PTR_QH; - - uhci->skel_ls_control_qh->link = cpu_to_le32(uhci->skel_fs_control_qh->dma_handle) | UHCI_PTR_QH; - uhci->skel_fs_control_qh->link = cpu_to_le32(uhci->skel_bulk_qh->dma_handle) | UHCI_PTR_QH; - uhci->skel_bulk_qh->link = cpu_to_le32(uhci->skel_term_qh->dma_handle) | UHCI_PTR_QH; + uhci->skel_int2_qh->link = UHCI_PTR_QH | + cpu_to_le32(uhci->skel_int1_qh->dma_handle); + + uhci->skel_int1_qh->link = UHCI_PTR_QH | + cpu_to_le32(uhci->skel_ls_control_qh->dma_handle); + uhci->skel_ls_control_qh->link = UHCI_PTR_QH | + cpu_to_le32(uhci->skel_fs_control_qh->dma_handle); + uhci->skel_fs_control_qh->link = UHCI_PTR_QH | + cpu_to_le32(uhci->skel_bulk_qh->dma_handle); + uhci->skel_bulk_qh->link = UHCI_PTR_QH | + cpu_to_le32(uhci->skel_term_qh->dma_handle); /* This dummy TD is to work around a bug in Intel PIIX controllers */ uhci_fill_td(uhci->term_td, 0, uhci_explen(0) | @@ -589,15 +644,15 @@ static int uhci_start(struct usb_hcd *hcd) /* * ffs (Find First bit Set) does exactly what we need: - * 1,3,5,... => ffs = 0 => use skel_int2_qh = skelqh[6], - * 2,6,10,... => ffs = 1 => use skel_int4_qh = skelqh[5], etc. - * ffs > 6 => not on any high-period queue, so use - * skel_int1_qh = skelqh[7]. + * 1,3,5,... => ffs = 0 => use skel_int2_qh = skelqh[8], + * 2,6,10,... => ffs = 1 => use skel_int4_qh = skelqh[7], etc. + * ffs >= 7 => not on any high-period queue, so use + * skel_int1_qh = skelqh[9]. * Add UHCI_NUMFRAMES to insure at least one bit is set. */ - irq = 6 - (int) __ffs(i + UHCI_NUMFRAMES); - if (irq < 0) - irq = 7; + irq = 8 - (int) __ffs(i + UHCI_NUMFRAMES); + if (irq <= 1) + irq = 9; /* Only place we don't use the frame list routines */ uhci->frame[i] = UHCI_PTR_QH | @@ -611,6 +666,7 @@ static int uhci_start(struct usb_hcd *hcd) mb(); configure_hc(uhci); + uhci->is_initialized = 1; start_rh(uhci); return 0; @@ -651,11 +707,12 @@ static void uhci_stop(struct usb_hcd *hcd) struct uhci_hcd *uhci = hcd_to_uhci(hcd); spin_lock_irq(&uhci->lock); - if (!uhci->hc_inaccessible) - hc_died(uhci); - uhci_scan_schedule(uhci, NULL); + if (test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags) && !uhci->dead) + uhci_hc_died(uhci); + uhci_scan_schedule(uhci); spin_unlock_irq(&uhci->lock); + del_timer_sync(&uhci->fsbr_timer); release_uhci(uhci); } @@ -663,12 +720,15 @@ static void uhci_stop(struct usb_hcd *hcd) static int uhci_rh_suspend(struct usb_hcd *hcd) { struct uhci_hcd *uhci = hcd_to_uhci(hcd); + int rc = 0; spin_lock_irq(&uhci->lock); - if (!uhci->hc_inaccessible) /* Not dead */ + if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) + rc = -ESHUTDOWN; + else if (!uhci->dead) suspend_rh(uhci, UHCI_RH_SUSPENDED); spin_unlock_irq(&uhci->lock); - return 0; + return rc; } static int uhci_rh_resume(struct usb_hcd *hcd) @@ -677,13 +737,10 @@ static int uhci_rh_resume(struct usb_hcd *hcd) int rc = 0; spin_lock_irq(&uhci->lock); - if (uhci->hc_inaccessible) { - if (uhci->rh_state == UHCI_RH_SUSPENDED) { - dev_warn(uhci_dev(uhci), "HC isn't running!\n"); - rc = -ENODEV; - } - /* Otherwise the HC is dead */ - } else + if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) { + dev_warn(&hcd->self.root_hub->dev, "HC isn't running!\n"); + rc = -ESHUTDOWN; + } else if (!uhci->dead) wakeup_rh(uhci); spin_unlock_irq(&uhci->lock); return rc; @@ -697,8 +754,8 @@ static int uhci_suspend(struct usb_hcd *hcd, pm_message_t message) dev_dbg(uhci_dev(uhci), "%s\n", __FUNCTION__); spin_lock_irq(&uhci->lock); - if (uhci->hc_inaccessible) /* Dead or already suspended */ - goto done; + if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags) || uhci->dead) + goto done_okay; /* Already suspended or dead */ if (uhci->rh_state > UHCI_RH_SUSPENDED) { dev_warn(uhci_dev(uhci), "Root hub isn't suspended!\n"); @@ -711,12 +768,16 @@ static int uhci_suspend(struct usb_hcd *hcd, pm_message_t message) */ pci_write_config_word(to_pci_dev(uhci_dev(uhci)), USBLEGSUP, 0); mb(); - clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); - uhci->hc_inaccessible = 1; hcd->poll_rh = 0; /* FIXME: Enable non-PME# remote wakeup? */ + /* make sure snapshot being resumed re-enumerates everything */ + if (message.event == PM_EVENT_PRETHAW) + uhci_hc_died(uhci); + +done_okay: + clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); done: spin_unlock_irq(&uhci->lock); return rc; @@ -729,24 +790,22 @@ static int uhci_resume(struct usb_hcd *hcd) dev_dbg(uhci_dev(uhci), "%s\n", __FUNCTION__); /* Since we aren't in D3 any more, it's safe to set this flag - * even if the controller was dead. It might not even be dead - * any more, if the firmware or quirks code has reset it. + * even if the controller was dead. */ set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); mb(); - if (uhci->rh_state == UHCI_RH_RESET) /* Dead */ - return 0; spin_lock_irq(&uhci->lock); /* FIXME: Disable non-PME# remote wakeup? */ - uhci->hc_inaccessible = 0; - - /* The BIOS may have changed the controller settings during a - * system wakeup. Check it and reconfigure to avoid problems. + /* The firmware or a boot kernel may have changed the controller + * settings during a system wakeup. Check it and reconfigure + * to avoid problems. */ check_and_reset_hc(uhci); + + /* If the controller was dead before, it's back alive now */ configure_hc(uhci); if (uhci->rh_state == UHCI_RH_RESET) { @@ -767,30 +826,44 @@ static int uhci_resume(struct usb_hcd *hcd) } #endif -/* Wait until all the URBs for a particular device/endpoint are gone */ +/* Wait until a particular device/endpoint's QH is idle, and free it */ static void uhci_hcd_endpoint_disable(struct usb_hcd *hcd, - struct usb_host_endpoint *ep) + struct usb_host_endpoint *hep) { struct uhci_hcd *uhci = hcd_to_uhci(hcd); + struct uhci_qh *qh; + + spin_lock_irq(&uhci->lock); + qh = (struct uhci_qh *) hep->hcpriv; + if (qh == NULL) + goto done; - wait_event_interruptible(uhci->waitqh, list_empty(&ep->urb_list)); + while (qh->state != QH_STATE_IDLE) { + ++uhci->num_waiting; + spin_unlock_irq(&uhci->lock); + wait_event_interruptible(uhci->waitqh, + qh->state == QH_STATE_IDLE); + spin_lock_irq(&uhci->lock); + --uhci->num_waiting; + } + + uhci_free_qh(uhci, qh); +done: + spin_unlock_irq(&uhci->lock); } static int uhci_hcd_get_frame_number(struct usb_hcd *hcd) { struct uhci_hcd *uhci = hcd_to_uhci(hcd); - unsigned long flags; - int is_stopped; - int frame_number; + unsigned frame_number; + unsigned delta; /* Minimize latency by avoiding the spinlock */ - local_irq_save(flags); - is_stopped = uhci->is_stopped; - smp_rmb(); - frame_number = (is_stopped ? uhci->frame_number : - inw(uhci->io_addr + USBFRNUM)); - local_irq_restore(flags); - return frame_number; + frame_number = uhci->frame_number; + barrier(); + delta = (inw(uhci->io_addr + USBFRNUM) - frame_number) & + (UHCI_NUMFRAMES - 1); + return frame_number + delta; } static const char hcd_name[] = "uhci_hcd"; @@ -805,7 +878,7 @@ static const struct hc_driver uhci_driver = { .flags = HCD_USB11, /* Basic lifecycle operations */ - .reset = uhci_reset, + .reset = uhci_init, .start = uhci_start, #ifdef CONFIG_PM .suspend = uhci_suspend, @@ -827,7 +900,7 @@ static const struct hc_driver uhci_driver = { static const struct pci_device_id uhci_pci_ids[] = { { /* handle any USB UHCI controller */ - PCI_DEVICE_CLASS(((PCI_CLASS_SERIAL_USB << 8) | 0x00), ~0), + PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_UHCI, ~0), .driver_data = (unsigned long) &uhci_driver, }, { /* end: all zeroes */ } }; @@ -852,21 +925,21 @@ static int __init uhci_hcd_init(void) { int retval = -ENOMEM; - printk(KERN_INFO DRIVER_DESC " " DRIVER_VERSION "\n"); + printk(KERN_INFO DRIVER_DESC " " DRIVER_VERSION "%s\n", + ignore_oc ? ", overcurrent ignored" : ""); if (usb_disabled()) return -ENODEV; - if (debug) { + if (DEBUG_CONFIGURED) { errbuf = kmalloc(ERRBUF_LEN, GFP_KERNEL); if (!errbuf) goto errbuf_failed; + uhci_debugfs_root = debugfs_create_dir("uhci", NULL); + if (!uhci_debugfs_root) + goto debug_failed; } - uhci_debugfs_root = debugfs_create_dir("uhci", NULL); - if (!uhci_debugfs_root) - goto debug_failed; - uhci_up_cachep = kmem_cache_create("uhci_urb_priv", sizeof(struct urb_priv), 0, 0, NULL, NULL); if (!uhci_up_cachep) @@ -879,8 +952,7 @@ static int __init uhci_hcd_init(void) return 0; init_failed: - if (kmem_cache_destroy(uhci_up_cachep)) - warn("not all urb_privs were freed!"); + kmem_cache_destroy(uhci_up_cachep); up_failed: debugfs_remove(uhci_debugfs_root); @@ -896,10 +968,7 @@ errbuf_failed: static void __exit uhci_hcd_cleanup(void) { pci_unregister_driver(&uhci_pci_driver); - - if (kmem_cache_destroy(uhci_up_cachep)) - warn("not all urb_privs were freed!"); - + kmem_cache_destroy(uhci_up_cachep); debugfs_remove(uhci_debugfs_root); kfree(errbuf); }