Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Universal Host Controller Interface driver for USB. |
| 3 | * |
| 4 | * Maintainer: Alan Stern <stern@rowland.harvard.edu> |
| 5 | * |
| 6 | * (C) Copyright 1999 Linus Torvalds |
| 7 | * (C) Copyright 1999-2002 Johannes Erdfelt, johannes@erdfelt.com |
| 8 | * (C) Copyright 1999 Randy Dunlap |
| 9 | * (C) Copyright 1999 Georg Acher, acher@in.tum.de |
| 10 | * (C) Copyright 1999 Deti Fliegl, deti@fliegl.de |
| 11 | * (C) Copyright 1999 Thomas Sailer, sailer@ife.ee.ethz.ch |
| 12 | * (C) Copyright 1999 Roman Weissgaerber, weissg@vienna.at |
| 13 | * (C) Copyright 2000 Yggdrasil Computing, Inc. (port of new PCI interface |
| 14 | * support from usb-ohci.c by Adam Richter, adam@yggdrasil.com). |
| 15 | * (C) Copyright 1999 Gregory P. Smith (from usb-ohci.c) |
Alan Stern | c433472 | 2006-05-19 16:34:57 -0400 | [diff] [blame] | 16 | * (C) Copyright 2004-2006 Alan Stern, stern@rowland.harvard.edu |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | * |
| 18 | * Intel documents this fairly well, and as far as I know there |
| 19 | * are no royalties or anything like that, but even so there are |
| 20 | * people who decided that they want to do the same thing in a |
| 21 | * completely different way. |
| 22 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | */ |
| 24 | |
| 25 | #include <linux/config.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | #include <linux/module.h> |
| 27 | #include <linux/pci.h> |
| 28 | #include <linux/kernel.h> |
| 29 | #include <linux/init.h> |
| 30 | #include <linux/delay.h> |
| 31 | #include <linux/ioport.h> |
| 32 | #include <linux/sched.h> |
| 33 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | #include <linux/errno.h> |
| 35 | #include <linux/unistd.h> |
| 36 | #include <linux/interrupt.h> |
| 37 | #include <linux/spinlock.h> |
| 38 | #include <linux/debugfs.h> |
| 39 | #include <linux/pm.h> |
| 40 | #include <linux/dmapool.h> |
| 41 | #include <linux/dma-mapping.h> |
| 42 | #include <linux/usb.h> |
| 43 | #include <linux/bitops.h> |
| 44 | |
| 45 | #include <asm/uaccess.h> |
| 46 | #include <asm/io.h> |
| 47 | #include <asm/irq.h> |
| 48 | #include <asm/system.h> |
| 49 | |
| 50 | #include "../core/hcd.h" |
| 51 | #include "uhci-hcd.h" |
Adrian Bunk | 75e2df6 | 2006-03-25 18:01:53 +0100 | [diff] [blame] | 52 | #include "pci-quirks.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | |
| 54 | /* |
| 55 | * Version Information |
| 56 | */ |
Alan Stern | dccf4a4 | 2005-12-17 17:58:46 -0500 | [diff] [blame] | 57 | #define DRIVER_VERSION "v3.0" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | #define DRIVER_AUTHOR "Linus 'Frodo Rabbit' Torvalds, Johannes Erdfelt, \ |
| 59 | Randy Dunlap, Georg Acher, Deti Fliegl, Thomas Sailer, Roman Weissgaerber, \ |
| 60 | Alan Stern" |
| 61 | #define DRIVER_DESC "USB Universal Host Controller Interface driver" |
| 62 | |
| 63 | /* |
| 64 | * debug = 0, no debugging messages |
Alan Stern | 687f5f3 | 2005-11-30 17:16:19 -0500 | [diff] [blame] | 65 | * debug = 1, dump failed URBs except for stalls |
| 66 | * debug = 2, dump all failed URBs (including stalls) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | * show all queues in /debug/uhci/[pci_addr] |
Alan Stern | 687f5f3 | 2005-11-30 17:16:19 -0500 | [diff] [blame] | 68 | * debug = 3, show all TDs in URBs when dumping |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | */ |
| 70 | #ifdef DEBUG |
Alan Stern | 8d402e1 | 2005-12-17 18:03:37 -0500 | [diff] [blame] | 71 | #define DEBUG_CONFIGURED 1 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | static int debug = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | module_param(debug, int, S_IRUGO | S_IWUSR); |
| 74 | MODULE_PARM_DESC(debug, "Debug level"); |
Alan Stern | 8d402e1 | 2005-12-17 18:03:37 -0500 | [diff] [blame] | 75 | |
| 76 | #else |
| 77 | #define DEBUG_CONFIGURED 0 |
| 78 | #define debug 0 |
| 79 | #endif |
| 80 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | static char *errbuf; |
| 82 | #define ERRBUF_LEN (32 * 1024) |
| 83 | |
| 84 | static kmem_cache_t *uhci_up_cachep; /* urb_priv */ |
| 85 | |
Alan Stern | 6c1b445 | 2005-04-21 16:04:58 -0400 | [diff] [blame] | 86 | static void suspend_rh(struct uhci_hcd *uhci, enum uhci_rh_state new_state); |
| 87 | static void wakeup_rh(struct uhci_hcd *uhci); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | static void uhci_get_current_frame_number(struct uhci_hcd *uhci); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | #include "uhci-debug.c" |
| 91 | #include "uhci-q.c" |
Alan Stern | 1f09df8 | 2005-09-05 13:59:51 -0400 | [diff] [blame] | 92 | #include "uhci-hub.c" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 94 | /* |
Alan Stern | bb200f6 | 2005-10-03 16:36:29 -0400 | [diff] [blame] | 95 | * Finish up a host controller reset and update the recorded state. |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 96 | */ |
Alan Stern | bb200f6 | 2005-10-03 16:36:29 -0400 | [diff] [blame] | 97 | static void finish_reset(struct uhci_hcd *uhci) |
Alan Stern | 014e73c | 2005-04-09 17:24:42 -0400 | [diff] [blame] | 98 | { |
Alan Stern | c074b41 | 2005-04-22 14:39:12 -0400 | [diff] [blame] | 99 | int port; |
| 100 | |
Alan Stern | c074b41 | 2005-04-22 14:39:12 -0400 | [diff] [blame] | 101 | /* HCRESET doesn't affect the Suspend, Reset, and Resume Detect |
| 102 | * bits in the port status and control registers. |
| 103 | * We have to clear them by hand. |
| 104 | */ |
| 105 | for (port = 0; port < uhci->rh_numports; ++port) |
| 106 | outw(0, uhci->io_addr + USBPORTSC1 + (port * 2)); |
| 107 | |
Alan Stern | 8e32640 | 2006-04-04 14:47:44 -0400 | [diff] [blame] | 108 | uhci->port_c_suspend = uhci->resuming_ports = 0; |
Alan Stern | c8f4fe4 | 2005-04-09 17:27:32 -0400 | [diff] [blame] | 109 | uhci->rh_state = UHCI_RH_RESET; |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 110 | uhci->is_stopped = UHCI_IS_STOPPED; |
| 111 | uhci_to_hcd(uhci)->state = HC_STATE_HALT; |
Alan Stern | 6c1b445 | 2005-04-21 16:04:58 -0400 | [diff] [blame] | 112 | uhci_to_hcd(uhci)->poll_rh = 0; |
Alan Stern | 014e73c | 2005-04-09 17:24:42 -0400 | [diff] [blame] | 113 | } |
| 114 | |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 115 | /* |
Alan Stern | 4daaa87 | 2005-04-09 17:30:08 -0400 | [diff] [blame] | 116 | * Last rites for a defunct/nonfunctional controller |
Alan Stern | 02597d2 | 2005-04-28 14:51:27 -0400 | [diff] [blame] | 117 | * or one we don't want to use any more. |
Alan Stern | 4daaa87 | 2005-04-09 17:30:08 -0400 | [diff] [blame] | 118 | */ |
| 119 | static void hc_died(struct uhci_hcd *uhci) |
| 120 | { |
Alan Stern | bb200f6 | 2005-10-03 16:36:29 -0400 | [diff] [blame] | 121 | uhci_reset_hc(to_pci_dev(uhci_dev(uhci)), uhci->io_addr); |
| 122 | finish_reset(uhci); |
Alan Stern | 4daaa87 | 2005-04-09 17:30:08 -0400 | [diff] [blame] | 123 | uhci->hc_inaccessible = 1; |
| 124 | } |
| 125 | |
| 126 | /* |
David Brownell | be3cbc5 | 2006-06-05 12:16:39 -0400 | [diff] [blame^] | 127 | * Initialize a controller that was newly discovered or has lost power |
| 128 | * or otherwise been reset while it was suspended. In none of these cases |
| 129 | * can we be sure of its previous state. |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 130 | */ |
| 131 | static void check_and_reset_hc(struct uhci_hcd *uhci) |
| 132 | { |
Alan Stern | bb200f6 | 2005-10-03 16:36:29 -0400 | [diff] [blame] | 133 | if (uhci_check_and_reset_hc(to_pci_dev(uhci_dev(uhci)), uhci->io_addr)) |
| 134 | finish_reset(uhci); |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 135 | } |
| 136 | |
| 137 | /* |
| 138 | * Store the basic register settings needed by the controller. |
| 139 | */ |
| 140 | static void configure_hc(struct uhci_hcd *uhci) |
| 141 | { |
| 142 | /* Set the frame length to the default: 1 ms exactly */ |
| 143 | outb(USBSOF_DEFAULT, uhci->io_addr + USBSOF); |
| 144 | |
| 145 | /* Store the frame list base address */ |
Alan Stern | a1d59ce | 2005-09-16 14:22:51 -0400 | [diff] [blame] | 146 | outl(uhci->frame_dma_handle, uhci->io_addr + USBFLBASEADD); |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 147 | |
| 148 | /* Set the current frame number */ |
Alan Stern | c433472 | 2006-05-19 16:34:57 -0400 | [diff] [blame] | 149 | outw(uhci->frame_number & UHCI_MAX_SOF_NUMBER, |
| 150 | uhci->io_addr + USBFRNUM); |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 151 | |
Alan Stern | f37be9b | 2005-10-17 10:42:06 -0400 | [diff] [blame] | 152 | /* Mark controller as not halted before we enable interrupts */ |
| 153 | uhci_to_hcd(uhci)->state = HC_STATE_SUSPENDED; |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 154 | mb(); |
| 155 | |
| 156 | /* Enable PIRQ */ |
| 157 | pci_write_config_word(to_pci_dev(uhci_dev(uhci)), USBLEGSUP, |
| 158 | USBLEGSUP_DEFAULT); |
| 159 | } |
| 160 | |
| 161 | |
Alan Stern | c8f4fe4 | 2005-04-09 17:27:32 -0400 | [diff] [blame] | 162 | static int resume_detect_interrupts_are_broken(struct uhci_hcd *uhci) |
Alan Stern | 014e73c | 2005-04-09 17:24:42 -0400 | [diff] [blame] | 163 | { |
Alan Stern | c8f4fe4 | 2005-04-09 17:27:32 -0400 | [diff] [blame] | 164 | int port; |
Alan Stern | 014e73c | 2005-04-09 17:24:42 -0400 | [diff] [blame] | 165 | |
Alan Stern | c8f4fe4 | 2005-04-09 17:27:32 -0400 | [diff] [blame] | 166 | switch (to_pci_dev(uhci_dev(uhci))->vendor) { |
| 167 | default: |
| 168 | break; |
Alan Stern | 014e73c | 2005-04-09 17:24:42 -0400 | [diff] [blame] | 169 | |
Alan Stern | c8f4fe4 | 2005-04-09 17:27:32 -0400 | [diff] [blame] | 170 | case PCI_VENDOR_ID_GENESYS: |
| 171 | /* Genesys Logic's GL880S controllers don't generate |
| 172 | * resume-detect interrupts. |
| 173 | */ |
| 174 | return 1; |
| 175 | |
| 176 | case PCI_VENDOR_ID_INTEL: |
| 177 | /* Some of Intel's USB controllers have a bug that causes |
| 178 | * resume-detect interrupts if any port has an over-current |
| 179 | * condition. To make matters worse, some motherboards |
| 180 | * hardwire unused USB ports' over-current inputs active! |
| 181 | * To prevent problems, we will not enable resume-detect |
| 182 | * interrupts if any ports are OC. |
| 183 | */ |
| 184 | for (port = 0; port < uhci->rh_numports; ++port) { |
| 185 | if (inw(uhci->io_addr + USBPORTSC1 + port * 2) & |
| 186 | USBPORTSC_OC) |
| 187 | return 1; |
| 188 | } |
| 189 | break; |
| 190 | } |
| 191 | return 0; |
| 192 | } |
| 193 | |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 194 | static void suspend_rh(struct uhci_hcd *uhci, enum uhci_rh_state new_state) |
Alan Stern | c8f4fe4 | 2005-04-09 17:27:32 -0400 | [diff] [blame] | 195 | __releases(uhci->lock) |
| 196 | __acquires(uhci->lock) |
| 197 | { |
| 198 | int auto_stop; |
| 199 | int int_enable; |
| 200 | |
| 201 | auto_stop = (new_state == UHCI_RH_AUTO_STOPPED); |
David Brownell | be3cbc5 | 2006-06-05 12:16:39 -0400 | [diff] [blame^] | 202 | dev_dbg(&uhci_to_hcd(uhci)->self.root_hub->dev, |
| 203 | "%s%s\n", __FUNCTION__, |
Alan Stern | c8f4fe4 | 2005-04-09 17:27:32 -0400 | [diff] [blame] | 204 | (auto_stop ? " (auto-stop)" : "")); |
| 205 | |
| 206 | /* If we get a suspend request when we're already auto-stopped |
| 207 | * then there's nothing to do. |
| 208 | */ |
| 209 | if (uhci->rh_state == UHCI_RH_AUTO_STOPPED) { |
| 210 | uhci->rh_state = new_state; |
| 211 | return; |
| 212 | } |
| 213 | |
| 214 | /* Enable resume-detect interrupts if they work. |
| 215 | * Then enter Global Suspend mode, still configured. |
| 216 | */ |
Alan Stern | 1f09df8 | 2005-09-05 13:59:51 -0400 | [diff] [blame] | 217 | uhci->working_RD = 1; |
| 218 | int_enable = USBINTR_RESUME; |
| 219 | if (resume_detect_interrupts_are_broken(uhci)) { |
| 220 | uhci->working_RD = int_enable = 0; |
| 221 | } |
Alan Stern | c8f4fe4 | 2005-04-09 17:27:32 -0400 | [diff] [blame] | 222 | outw(int_enable, uhci->io_addr + USBINTR); |
| 223 | outw(USBCMD_EGSM | USBCMD_CF, uhci->io_addr + USBCMD); |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 224 | mb(); |
Alan Stern | c8f4fe4 | 2005-04-09 17:27:32 -0400 | [diff] [blame] | 225 | udelay(5); |
| 226 | |
| 227 | /* If we're auto-stopping then no devices have been attached |
| 228 | * for a while, so there shouldn't be any active URBs and the |
| 229 | * controller should stop after a few microseconds. Otherwise |
| 230 | * we will give the controller one frame to stop. |
| 231 | */ |
| 232 | if (!auto_stop && !(inw(uhci->io_addr + USBSTS) & USBSTS_HCH)) { |
| 233 | uhci->rh_state = UHCI_RH_SUSPENDING; |
| 234 | spin_unlock_irq(&uhci->lock); |
| 235 | msleep(1); |
| 236 | spin_lock_irq(&uhci->lock); |
Alan Stern | 4daaa87 | 2005-04-09 17:30:08 -0400 | [diff] [blame] | 237 | if (uhci->hc_inaccessible) /* Died */ |
| 238 | return; |
Alan Stern | c8f4fe4 | 2005-04-09 17:27:32 -0400 | [diff] [blame] | 239 | } |
| 240 | if (!(inw(uhci->io_addr + USBSTS) & USBSTS_HCH)) |
David Brownell | be3cbc5 | 2006-06-05 12:16:39 -0400 | [diff] [blame^] | 241 | dev_warn(&uhci_to_hcd(uhci)->self.root_hub->dev, |
| 242 | "Controller not stopped yet!\n"); |
Alan Stern | c8f4fe4 | 2005-04-09 17:27:32 -0400 | [diff] [blame] | 243 | |
Alan Stern | 014e73c | 2005-04-09 17:24:42 -0400 | [diff] [blame] | 244 | uhci_get_current_frame_number(uhci); |
Alan Stern | c8f4fe4 | 2005-04-09 17:27:32 -0400 | [diff] [blame] | 245 | |
| 246 | uhci->rh_state = new_state; |
Alan Stern | 014e73c | 2005-04-09 17:24:42 -0400 | [diff] [blame] | 247 | uhci->is_stopped = UHCI_IS_STOPPED; |
Alan Stern | 6c1b445 | 2005-04-21 16:04:58 -0400 | [diff] [blame] | 248 | uhci_to_hcd(uhci)->poll_rh = !int_enable; |
Alan Stern | 014e73c | 2005-04-09 17:24:42 -0400 | [diff] [blame] | 249 | |
| 250 | uhci_scan_schedule(uhci, NULL); |
Alan Stern | 84afddd | 2006-05-12 11:35:45 -0400 | [diff] [blame] | 251 | uhci_fsbr_off(uhci); |
Alan Stern | 014e73c | 2005-04-09 17:24:42 -0400 | [diff] [blame] | 252 | } |
| 253 | |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 254 | static void start_rh(struct uhci_hcd *uhci) |
| 255 | { |
Alan Stern | f37be9b | 2005-10-17 10:42:06 -0400 | [diff] [blame] | 256 | uhci_to_hcd(uhci)->state = HC_STATE_RUNNING; |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 257 | uhci->is_stopped = 0; |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 258 | |
| 259 | /* Mark it configured and running with a 64-byte max packet. |
| 260 | * All interrupts are enabled, even though RESUME won't do anything. |
| 261 | */ |
| 262 | outw(USBCMD_RS | USBCMD_CF | USBCMD_MAXP, uhci->io_addr + USBCMD); |
| 263 | outw(USBINTR_TIMEOUT | USBINTR_RESUME | USBINTR_IOC | USBINTR_SP, |
| 264 | uhci->io_addr + USBINTR); |
| 265 | mb(); |
Alan Stern | 6c1b445 | 2005-04-21 16:04:58 -0400 | [diff] [blame] | 266 | uhci->rh_state = UHCI_RH_RUNNING; |
| 267 | uhci_to_hcd(uhci)->poll_rh = 1; |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 268 | } |
| 269 | |
| 270 | static void wakeup_rh(struct uhci_hcd *uhci) |
Alan Stern | c8f4fe4 | 2005-04-09 17:27:32 -0400 | [diff] [blame] | 271 | __releases(uhci->lock) |
| 272 | __acquires(uhci->lock) |
Alan Stern | 014e73c | 2005-04-09 17:24:42 -0400 | [diff] [blame] | 273 | { |
David Brownell | be3cbc5 | 2006-06-05 12:16:39 -0400 | [diff] [blame^] | 274 | dev_dbg(&uhci_to_hcd(uhci)->self.root_hub->dev, |
| 275 | "%s%s\n", __FUNCTION__, |
Alan Stern | c8f4fe4 | 2005-04-09 17:27:32 -0400 | [diff] [blame] | 276 | uhci->rh_state == UHCI_RH_AUTO_STOPPED ? |
| 277 | " (auto-start)" : ""); |
Alan Stern | 014e73c | 2005-04-09 17:24:42 -0400 | [diff] [blame] | 278 | |
Alan Stern | c8f4fe4 | 2005-04-09 17:27:32 -0400 | [diff] [blame] | 279 | /* If we are auto-stopped then no devices are attached so there's |
| 280 | * no need for wakeup signals. Otherwise we send Global Resume |
| 281 | * for 20 ms. |
| 282 | */ |
| 283 | if (uhci->rh_state == UHCI_RH_SUSPENDED) { |
| 284 | uhci->rh_state = UHCI_RH_RESUMING; |
| 285 | outw(USBCMD_FGR | USBCMD_EGSM | USBCMD_CF, |
| 286 | uhci->io_addr + USBCMD); |
| 287 | spin_unlock_irq(&uhci->lock); |
| 288 | msleep(20); |
| 289 | spin_lock_irq(&uhci->lock); |
Alan Stern | 4daaa87 | 2005-04-09 17:30:08 -0400 | [diff] [blame] | 290 | if (uhci->hc_inaccessible) /* Died */ |
| 291 | return; |
Alan Stern | 014e73c | 2005-04-09 17:24:42 -0400 | [diff] [blame] | 292 | |
Alan Stern | c8f4fe4 | 2005-04-09 17:27:32 -0400 | [diff] [blame] | 293 | /* End Global Resume and wait for EOP to be sent */ |
| 294 | outw(USBCMD_CF, uhci->io_addr + USBCMD); |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 295 | mb(); |
Alan Stern | c8f4fe4 | 2005-04-09 17:27:32 -0400 | [diff] [blame] | 296 | udelay(4); |
| 297 | if (inw(uhci->io_addr + USBCMD) & USBCMD_FGR) |
| 298 | dev_warn(uhci_dev(uhci), "FGR not stopped yet!\n"); |
Alan Stern | 014e73c | 2005-04-09 17:24:42 -0400 | [diff] [blame] | 299 | } |
Alan Stern | c8f4fe4 | 2005-04-09 17:27:32 -0400 | [diff] [blame] | 300 | |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 301 | start_rh(uhci); |
Alan Stern | 014e73c | 2005-04-09 17:24:42 -0400 | [diff] [blame] | 302 | |
Alan Stern | 6c1b445 | 2005-04-21 16:04:58 -0400 | [diff] [blame] | 303 | /* Restart root hub polling */ |
| 304 | mod_timer(&uhci_to_hcd(uhci)->rh_timer, jiffies); |
Alan Stern | 014e73c | 2005-04-09 17:24:42 -0400 | [diff] [blame] | 305 | } |
| 306 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | static irqreturn_t uhci_irq(struct usb_hcd *hcd, struct pt_regs *regs) |
| 308 | { |
| 309 | struct uhci_hcd *uhci = hcd_to_uhci(hcd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | unsigned short status; |
Alan Stern | 4daaa87 | 2005-04-09 17:30:08 -0400 | [diff] [blame] | 311 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | |
| 313 | /* |
| 314 | * Read the interrupt status, and write it back to clear the |
| 315 | * interrupt cause. Contrary to the UHCI specification, the |
| 316 | * "HC Halted" status bit is persistent: it is RO, not R/WC. |
| 317 | */ |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 318 | status = inw(uhci->io_addr + USBSTS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | if (!(status & ~USBSTS_HCH)) /* shared interrupt, not mine */ |
| 320 | return IRQ_NONE; |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 321 | outw(status, uhci->io_addr + USBSTS); /* Clear it */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | |
| 323 | if (status & ~(USBSTS_USBINT | USBSTS_ERROR | USBSTS_RD)) { |
| 324 | if (status & USBSTS_HSE) |
| 325 | dev_err(uhci_dev(uhci), "host system error, " |
| 326 | "PCI problems?\n"); |
| 327 | if (status & USBSTS_HCPE) |
| 328 | dev_err(uhci_dev(uhci), "host controller process " |
| 329 | "error, something bad happened!\n"); |
Alan Stern | 4daaa87 | 2005-04-09 17:30:08 -0400 | [diff] [blame] | 330 | if (status & USBSTS_HCH) { |
| 331 | spin_lock_irqsave(&uhci->lock, flags); |
| 332 | if (uhci->rh_state >= UHCI_RH_RUNNING) { |
| 333 | dev_err(uhci_dev(uhci), |
| 334 | "host controller halted, " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | "very bad!\n"); |
Alan Stern | 8d402e1 | 2005-12-17 18:03:37 -0500 | [diff] [blame] | 336 | if (debug > 1 && errbuf) { |
| 337 | /* Print the schedule for debugging */ |
| 338 | uhci_sprint_schedule(uhci, |
| 339 | errbuf, ERRBUF_LEN); |
| 340 | lprintk(errbuf); |
| 341 | } |
Alan Stern | 4daaa87 | 2005-04-09 17:30:08 -0400 | [diff] [blame] | 342 | hc_died(uhci); |
Alan Stern | 1f09df8 | 2005-09-05 13:59:51 -0400 | [diff] [blame] | 343 | |
| 344 | /* Force a callback in case there are |
| 345 | * pending unlinks */ |
| 346 | mod_timer(&hcd->rh_timer, jiffies); |
Alan Stern | 4daaa87 | 2005-04-09 17:30:08 -0400 | [diff] [blame] | 347 | } |
| 348 | spin_unlock_irqrestore(&uhci->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | } |
| 350 | } |
| 351 | |
| 352 | if (status & USBSTS_RD) |
Alan Stern | 6c1b445 | 2005-04-21 16:04:58 -0400 | [diff] [blame] | 353 | usb_hcd_poll_rh_status(hcd); |
Alan Stern | 1f09df8 | 2005-09-05 13:59:51 -0400 | [diff] [blame] | 354 | else { |
| 355 | spin_lock_irqsave(&uhci->lock, flags); |
| 356 | uhci_scan_schedule(uhci, regs); |
| 357 | spin_unlock_irqrestore(&uhci->lock, flags); |
| 358 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | |
| 360 | return IRQ_HANDLED; |
| 361 | } |
| 362 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | /* |
| 364 | * Store the current frame number in uhci->frame_number if the controller |
Alan Stern | c433472 | 2006-05-19 16:34:57 -0400 | [diff] [blame] | 365 | * is runnning. Expand from 11 bits (of which we use only 10) to a |
| 366 | * full-sized integer. |
| 367 | * |
| 368 | * Like many other parts of the driver, this code relies on being polled |
| 369 | * more than once per second as long as the controller is running. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 370 | */ |
| 371 | static void uhci_get_current_frame_number(struct uhci_hcd *uhci) |
| 372 | { |
Alan Stern | c433472 | 2006-05-19 16:34:57 -0400 | [diff] [blame] | 373 | if (!uhci->is_stopped) { |
| 374 | unsigned delta; |
| 375 | |
| 376 | delta = (inw(uhci->io_addr + USBFRNUM) - uhci->frame_number) & |
| 377 | (UHCI_NUMFRAMES - 1); |
| 378 | uhci->frame_number += delta; |
| 379 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | } |
| 381 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | /* |
| 383 | * De-allocate all resources |
| 384 | */ |
| 385 | static void release_uhci(struct uhci_hcd *uhci) |
| 386 | { |
| 387 | int i; |
| 388 | |
Alan Stern | 8d402e1 | 2005-12-17 18:03:37 -0500 | [diff] [blame] | 389 | if (DEBUG_CONFIGURED) { |
| 390 | spin_lock_irq(&uhci->lock); |
| 391 | uhci->is_initialized = 0; |
| 392 | spin_unlock_irq(&uhci->lock); |
| 393 | |
| 394 | debugfs_remove(uhci->dentry); |
| 395 | } |
| 396 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | for (i = 0; i < UHCI_NUM_SKELQH; i++) |
Alan Stern | 8b4cd42 | 2005-09-16 14:17:45 -0400 | [diff] [blame] | 398 | uhci_free_qh(uhci, uhci->skelqh[i]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 399 | |
Alan Stern | 8b4cd42 | 2005-09-16 14:17:45 -0400 | [diff] [blame] | 400 | uhci_free_td(uhci, uhci->term_td); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | |
Alan Stern | 8b4cd42 | 2005-09-16 14:17:45 -0400 | [diff] [blame] | 402 | dma_pool_destroy(uhci->qh_pool); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | |
Alan Stern | 8b4cd42 | 2005-09-16 14:17:45 -0400 | [diff] [blame] | 404 | dma_pool_destroy(uhci->td_pool); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | |
Alan Stern | a1d59ce | 2005-09-16 14:22:51 -0400 | [diff] [blame] | 406 | kfree(uhci->frame_cpu); |
| 407 | |
| 408 | dma_free_coherent(uhci_dev(uhci), |
| 409 | UHCI_NUMFRAMES * sizeof(*uhci->frame), |
| 410 | uhci->frame, uhci->frame_dma_handle); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | } |
| 412 | |
David Brownell | be3cbc5 | 2006-06-05 12:16:39 -0400 | [diff] [blame^] | 413 | static int uhci_init(struct usb_hcd *hcd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | { |
| 415 | struct uhci_hcd *uhci = hcd_to_uhci(hcd); |
Alan Stern | c074b41 | 2005-04-22 14:39:12 -0400 | [diff] [blame] | 416 | unsigned io_size = (unsigned) hcd->rsrc_len; |
| 417 | int port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | |
| 419 | uhci->io_addr = (unsigned long) hcd->rsrc_start; |
| 420 | |
Alan Stern | c074b41 | 2005-04-22 14:39:12 -0400 | [diff] [blame] | 421 | /* The UHCI spec says devices must have 2 ports, and goes on to say |
| 422 | * they may have more but gives no way to determine how many there |
Alan Stern | e07fefa | 2005-05-31 16:33:21 -0400 | [diff] [blame] | 423 | * are. However according to the UHCI spec, Bit 7 of the port |
Alan Stern | c074b41 | 2005-04-22 14:39:12 -0400 | [diff] [blame] | 424 | * status and control register is always set to 1. So we try to |
Alan Stern | e07fefa | 2005-05-31 16:33:21 -0400 | [diff] [blame] | 425 | * use this to our advantage. Another common failure mode when |
| 426 | * a nonexistent register is addressed is to return all ones, so |
| 427 | * we test for that also. |
Alan Stern | c074b41 | 2005-04-22 14:39:12 -0400 | [diff] [blame] | 428 | */ |
| 429 | for (port = 0; port < (io_size - USBPORTSC1) / 2; port++) { |
| 430 | unsigned int portstatus; |
| 431 | |
| 432 | portstatus = inw(uhci->io_addr + USBPORTSC1 + (port * 2)); |
Alan Stern | e07fefa | 2005-05-31 16:33:21 -0400 | [diff] [blame] | 433 | if (!(portstatus & 0x0080) || portstatus == 0xffff) |
Alan Stern | c074b41 | 2005-04-22 14:39:12 -0400 | [diff] [blame] | 434 | break; |
| 435 | } |
| 436 | if (debug) |
| 437 | dev_info(uhci_dev(uhci), "detected %d ports\n", port); |
| 438 | |
Alan Stern | e07fefa | 2005-05-31 16:33:21 -0400 | [diff] [blame] | 439 | /* Anything greater than 7 is weird so we'll ignore it. */ |
| 440 | if (port > UHCI_RH_MAXCHILD) { |
Alan Stern | c074b41 | 2005-04-22 14:39:12 -0400 | [diff] [blame] | 441 | dev_info(uhci_dev(uhci), "port count misdetected? " |
| 442 | "forcing to 2 ports\n"); |
| 443 | port = 2; |
| 444 | } |
| 445 | uhci->rh_numports = port; |
| 446 | |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 447 | /* Kick BIOS off this hardware and reset if the controller |
| 448 | * isn't already safely quiescent. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | */ |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 450 | check_and_reset_hc(uhci); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | return 0; |
| 452 | } |
| 453 | |
Alan Stern | 02597d2 | 2005-04-28 14:51:27 -0400 | [diff] [blame] | 454 | /* Make sure the controller is quiescent and that we're not using it |
| 455 | * any more. This is mainly for the benefit of programs which, like kexec, |
| 456 | * expect the hardware to be idle: not doing DMA or generating IRQs. |
| 457 | * |
| 458 | * This routine may be called in a damaged or failing kernel. Hence we |
| 459 | * do not acquire the spinlock before shutting down the controller. |
| 460 | */ |
| 461 | static void uhci_shutdown(struct pci_dev *pdev) |
| 462 | { |
| 463 | struct usb_hcd *hcd = (struct usb_hcd *) pci_get_drvdata(pdev); |
| 464 | |
| 465 | hc_died(hcd_to_uhci(hcd)); |
| 466 | } |
| 467 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | /* |
| 469 | * Allocate a frame list, and then setup the skeleton |
| 470 | * |
| 471 | * The hardware doesn't really know any difference |
| 472 | * in the queues, but the order does matter for the |
| 473 | * protocols higher up. The order is: |
| 474 | * |
| 475 | * - any isochronous events handled before any |
| 476 | * of the queues. We don't do that here, because |
| 477 | * we'll create the actual TD entries on demand. |
| 478 | * - The first queue is the interrupt queue. |
| 479 | * - The second queue is the control queue, split into low- and full-speed |
| 480 | * - The third queue is bulk queue. |
| 481 | * - The fourth queue is the bandwidth reclamation queue, which loops back |
| 482 | * to the full-speed control queue. |
| 483 | */ |
| 484 | static int uhci_start(struct usb_hcd *hcd) |
| 485 | { |
| 486 | struct uhci_hcd *uhci = hcd_to_uhci(hcd); |
| 487 | int retval = -EBUSY; |
Alan Stern | c074b41 | 2005-04-22 14:39:12 -0400 | [diff] [blame] | 488 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 489 | struct dentry *dentry; |
| 490 | |
Alan Stern | 6c1b445 | 2005-04-21 16:04:58 -0400 | [diff] [blame] | 491 | hcd->uses_new_polling = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 493 | spin_lock_init(&uhci->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | |
Alan Stern | dccf4a4 | 2005-12-17 17:58:46 -0500 | [diff] [blame] | 495 | INIT_LIST_HEAD(&uhci->idle_qh_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | |
| 497 | init_waitqueue_head(&uhci->waitqh); |
| 498 | |
Alan Stern | 8d402e1 | 2005-12-17 18:03:37 -0500 | [diff] [blame] | 499 | if (DEBUG_CONFIGURED) { |
| 500 | dentry = debugfs_create_file(hcd->self.bus_name, |
| 501 | S_IFREG|S_IRUGO|S_IWUSR, uhci_debugfs_root, |
| 502 | uhci, &uhci_debug_operations); |
| 503 | if (!dentry) { |
| 504 | dev_err(uhci_dev(uhci), "couldn't create uhci " |
| 505 | "debugfs entry\n"); |
| 506 | retval = -ENOMEM; |
| 507 | goto err_create_debug_entry; |
| 508 | } |
| 509 | uhci->dentry = dentry; |
| 510 | } |
| 511 | |
Alan Stern | a1d59ce | 2005-09-16 14:22:51 -0400 | [diff] [blame] | 512 | uhci->frame = dma_alloc_coherent(uhci_dev(uhci), |
| 513 | UHCI_NUMFRAMES * sizeof(*uhci->frame), |
| 514 | &uhci->frame_dma_handle, 0); |
| 515 | if (!uhci->frame) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 516 | dev_err(uhci_dev(uhci), "unable to allocate " |
| 517 | "consistent memory for frame list\n"); |
Alan Stern | a1d59ce | 2005-09-16 14:22:51 -0400 | [diff] [blame] | 518 | goto err_alloc_frame; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | } |
Alan Stern | a1d59ce | 2005-09-16 14:22:51 -0400 | [diff] [blame] | 520 | memset(uhci->frame, 0, UHCI_NUMFRAMES * sizeof(*uhci->frame)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 521 | |
Alan Stern | a1d59ce | 2005-09-16 14:22:51 -0400 | [diff] [blame] | 522 | uhci->frame_cpu = kcalloc(UHCI_NUMFRAMES, sizeof(*uhci->frame_cpu), |
| 523 | GFP_KERNEL); |
| 524 | if (!uhci->frame_cpu) { |
| 525 | dev_err(uhci_dev(uhci), "unable to allocate " |
| 526 | "memory for frame pointers\n"); |
| 527 | goto err_alloc_frame_cpu; |
| 528 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | |
| 530 | uhci->td_pool = dma_pool_create("uhci_td", uhci_dev(uhci), |
| 531 | sizeof(struct uhci_td), 16, 0); |
| 532 | if (!uhci->td_pool) { |
| 533 | dev_err(uhci_dev(uhci), "unable to create td dma_pool\n"); |
| 534 | goto err_create_td_pool; |
| 535 | } |
| 536 | |
| 537 | uhci->qh_pool = dma_pool_create("uhci_qh", uhci_dev(uhci), |
| 538 | sizeof(struct uhci_qh), 16, 0); |
| 539 | if (!uhci->qh_pool) { |
| 540 | dev_err(uhci_dev(uhci), "unable to create qh dma_pool\n"); |
| 541 | goto err_create_qh_pool; |
| 542 | } |
| 543 | |
Alan Stern | 2532178 | 2005-04-25 11:14:31 -0400 | [diff] [blame] | 544 | uhci->term_td = uhci_alloc_td(uhci); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 545 | if (!uhci->term_td) { |
| 546 | dev_err(uhci_dev(uhci), "unable to allocate terminating TD\n"); |
| 547 | goto err_alloc_term_td; |
| 548 | } |
| 549 | |
| 550 | for (i = 0; i < UHCI_NUM_SKELQH; i++) { |
Alan Stern | dccf4a4 | 2005-12-17 17:58:46 -0500 | [diff] [blame] | 551 | uhci->skelqh[i] = uhci_alloc_qh(uhci, NULL, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 552 | if (!uhci->skelqh[i]) { |
| 553 | dev_err(uhci_dev(uhci), "unable to allocate QH\n"); |
| 554 | goto err_alloc_skelqh; |
| 555 | } |
| 556 | } |
| 557 | |
| 558 | /* |
| 559 | * 8 Interrupt queues; link all higher int queues to int1, |
| 560 | * then link int1 to control and control to bulk |
| 561 | */ |
| 562 | uhci->skel_int128_qh->link = |
| 563 | uhci->skel_int64_qh->link = |
| 564 | uhci->skel_int32_qh->link = |
| 565 | uhci->skel_int16_qh->link = |
| 566 | uhci->skel_int8_qh->link = |
| 567 | uhci->skel_int4_qh->link = |
Alan Stern | dccf4a4 | 2005-12-17 17:58:46 -0500 | [diff] [blame] | 568 | uhci->skel_int2_qh->link = UHCI_PTR_QH | |
| 569 | cpu_to_le32(uhci->skel_int1_qh->dma_handle); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | |
Alan Stern | dccf4a4 | 2005-12-17 17:58:46 -0500 | [diff] [blame] | 571 | uhci->skel_int1_qh->link = UHCI_PTR_QH | |
| 572 | cpu_to_le32(uhci->skel_ls_control_qh->dma_handle); |
| 573 | uhci->skel_ls_control_qh->link = UHCI_PTR_QH | |
| 574 | cpu_to_le32(uhci->skel_fs_control_qh->dma_handle); |
| 575 | uhci->skel_fs_control_qh->link = UHCI_PTR_QH | |
| 576 | cpu_to_le32(uhci->skel_bulk_qh->dma_handle); |
| 577 | uhci->skel_bulk_qh->link = UHCI_PTR_QH | |
| 578 | cpu_to_le32(uhci->skel_term_qh->dma_handle); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 579 | |
| 580 | /* This dummy TD is to work around a bug in Intel PIIX controllers */ |
Alan Stern | fa34656 | 2005-11-30 11:57:51 -0500 | [diff] [blame] | 581 | uhci_fill_td(uhci->term_td, 0, uhci_explen(0) | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | (0x7f << TD_TOKEN_DEVADDR_SHIFT) | USB_PID_IN, 0); |
| 583 | uhci->term_td->link = cpu_to_le32(uhci->term_td->dma_handle); |
| 584 | |
| 585 | uhci->skel_term_qh->link = UHCI_PTR_TERM; |
| 586 | uhci->skel_term_qh->element = cpu_to_le32(uhci->term_td->dma_handle); |
| 587 | |
| 588 | /* |
| 589 | * Fill the frame list: make all entries point to the proper |
| 590 | * interrupt queue. |
| 591 | * |
| 592 | * The interrupt queues will be interleaved as evenly as possible. |
| 593 | * There's not much to be done about period-1 interrupts; they have |
| 594 | * to occur in every frame. But we can schedule period-2 interrupts |
| 595 | * in odd-numbered frames, period-4 interrupts in frames congruent |
| 596 | * to 2 (mod 4), and so on. This way each frame only has two |
| 597 | * interrupt QHs, which will help spread out bandwidth utilization. |
| 598 | */ |
| 599 | for (i = 0; i < UHCI_NUMFRAMES; i++) { |
| 600 | int irq; |
| 601 | |
| 602 | /* |
| 603 | * ffs (Find First bit Set) does exactly what we need: |
Alan Stern | dccf4a4 | 2005-12-17 17:58:46 -0500 | [diff] [blame] | 604 | * 1,3,5,... => ffs = 0 => use skel_int2_qh = skelqh[8], |
| 605 | * 2,6,10,... => ffs = 1 => use skel_int4_qh = skelqh[7], etc. |
| 606 | * ffs >= 7 => not on any high-period queue, so use |
| 607 | * skel_int1_qh = skelqh[9]. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 608 | * Add UHCI_NUMFRAMES to insure at least one bit is set. |
| 609 | */ |
Alan Stern | dccf4a4 | 2005-12-17 17:58:46 -0500 | [diff] [blame] | 610 | irq = 8 - (int) __ffs(i + UHCI_NUMFRAMES); |
| 611 | if (irq <= 1) |
| 612 | irq = 9; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 613 | |
| 614 | /* Only place we don't use the frame list routines */ |
Alan Stern | a1d59ce | 2005-09-16 14:22:51 -0400 | [diff] [blame] | 615 | uhci->frame[i] = UHCI_PTR_QH | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 616 | cpu_to_le32(uhci->skelqh[irq]->dma_handle); |
| 617 | } |
| 618 | |
| 619 | /* |
| 620 | * Some architectures require a full mb() to enforce completion of |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 621 | * the memory writes above before the I/O transfers in configure_hc(). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 622 | */ |
| 623 | mb(); |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 624 | |
| 625 | configure_hc(uhci); |
Alan Stern | 8d402e1 | 2005-12-17 18:03:37 -0500 | [diff] [blame] | 626 | uhci->is_initialized = 1; |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 627 | start_rh(uhci); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 628 | return 0; |
| 629 | |
| 630 | /* |
| 631 | * error exits: |
| 632 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 633 | err_alloc_skelqh: |
Alan Stern | 8b4cd42 | 2005-09-16 14:17:45 -0400 | [diff] [blame] | 634 | for (i = 0; i < UHCI_NUM_SKELQH; i++) { |
| 635 | if (uhci->skelqh[i]) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 636 | uhci_free_qh(uhci, uhci->skelqh[i]); |
Alan Stern | 8b4cd42 | 2005-09-16 14:17:45 -0400 | [diff] [blame] | 637 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 638 | |
| 639 | uhci_free_td(uhci, uhci->term_td); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 640 | |
| 641 | err_alloc_term_td: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 642 | dma_pool_destroy(uhci->qh_pool); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | |
| 644 | err_create_qh_pool: |
| 645 | dma_pool_destroy(uhci->td_pool); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 646 | |
| 647 | err_create_td_pool: |
Alan Stern | a1d59ce | 2005-09-16 14:22:51 -0400 | [diff] [blame] | 648 | kfree(uhci->frame_cpu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 649 | |
Alan Stern | a1d59ce | 2005-09-16 14:22:51 -0400 | [diff] [blame] | 650 | err_alloc_frame_cpu: |
| 651 | dma_free_coherent(uhci_dev(uhci), |
| 652 | UHCI_NUMFRAMES * sizeof(*uhci->frame), |
| 653 | uhci->frame, uhci->frame_dma_handle); |
| 654 | |
| 655 | err_alloc_frame: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 656 | debugfs_remove(uhci->dentry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 657 | |
| 658 | err_create_debug_entry: |
| 659 | return retval; |
| 660 | } |
| 661 | |
| 662 | static void uhci_stop(struct usb_hcd *hcd) |
| 663 | { |
| 664 | struct uhci_hcd *uhci = hcd_to_uhci(hcd); |
| 665 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 666 | spin_lock_irq(&uhci->lock); |
Alan Stern | 1f09df8 | 2005-09-05 13:59:51 -0400 | [diff] [blame] | 667 | if (!uhci->hc_inaccessible) |
Alan Stern | bb200f6 | 2005-10-03 16:36:29 -0400 | [diff] [blame] | 668 | hc_died(uhci); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | uhci_scan_schedule(uhci, NULL); |
| 670 | spin_unlock_irq(&uhci->lock); |
Alan Stern | 6c1b445 | 2005-04-21 16:04:58 -0400 | [diff] [blame] | 671 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 672 | release_uhci(uhci); |
| 673 | } |
| 674 | |
| 675 | #ifdef CONFIG_PM |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 676 | static int uhci_rh_suspend(struct usb_hcd *hcd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 677 | { |
| 678 | struct uhci_hcd *uhci = hcd_to_uhci(hcd); |
David Brownell | be3cbc5 | 2006-06-05 12:16:39 -0400 | [diff] [blame^] | 679 | int rc = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 680 | |
| 681 | spin_lock_irq(&uhci->lock); |
David Brownell | be3cbc5 | 2006-06-05 12:16:39 -0400 | [diff] [blame^] | 682 | if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) |
| 683 | rc = -ESHUTDOWN; |
| 684 | else if (!uhci->hc_inaccessible) |
Alan Stern | 4daaa87 | 2005-04-09 17:30:08 -0400 | [diff] [blame] | 685 | suspend_rh(uhci, UHCI_RH_SUSPENDED); |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 686 | spin_unlock_irq(&uhci->lock); |
David Brownell | be3cbc5 | 2006-06-05 12:16:39 -0400 | [diff] [blame^] | 687 | return rc; |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 688 | } |
| 689 | |
| 690 | static int uhci_rh_resume(struct usb_hcd *hcd) |
| 691 | { |
| 692 | struct uhci_hcd *uhci = hcd_to_uhci(hcd); |
Alan Stern | 4daaa87 | 2005-04-09 17:30:08 -0400 | [diff] [blame] | 693 | int rc = 0; |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 694 | |
| 695 | spin_lock_irq(&uhci->lock); |
David Brownell | be3cbc5 | 2006-06-05 12:16:39 -0400 | [diff] [blame^] | 696 | if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) { |
| 697 | dev_warn(&hcd->self.root_hub->dev, "HC isn't running!\n"); |
| 698 | rc = -ESHUTDOWN; |
| 699 | } else if (!uhci->hc_inaccessible) |
Alan Stern | 4daaa87 | 2005-04-09 17:30:08 -0400 | [diff] [blame] | 700 | wakeup_rh(uhci); |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 701 | spin_unlock_irq(&uhci->lock); |
Alan Stern | 4daaa87 | 2005-04-09 17:30:08 -0400 | [diff] [blame] | 702 | return rc; |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 703 | } |
| 704 | |
| 705 | static int uhci_suspend(struct usb_hcd *hcd, pm_message_t message) |
| 706 | { |
| 707 | struct uhci_hcd *uhci = hcd_to_uhci(hcd); |
Alan Stern | 4daaa87 | 2005-04-09 17:30:08 -0400 | [diff] [blame] | 708 | int rc = 0; |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 709 | |
| 710 | dev_dbg(uhci_dev(uhci), "%s\n", __FUNCTION__); |
| 711 | |
| 712 | spin_lock_irq(&uhci->lock); |
Alan Stern | 4daaa87 | 2005-04-09 17:30:08 -0400 | [diff] [blame] | 713 | if (uhci->hc_inaccessible) /* Dead or already suspended */ |
| 714 | goto done; |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 715 | |
Alan Stern | 4daaa87 | 2005-04-09 17:30:08 -0400 | [diff] [blame] | 716 | if (uhci->rh_state > UHCI_RH_SUSPENDED) { |
| 717 | dev_warn(uhci_dev(uhci), "Root hub isn't suspended!\n"); |
Alan Stern | 4daaa87 | 2005-04-09 17:30:08 -0400 | [diff] [blame] | 718 | rc = -EBUSY; |
| 719 | goto done; |
| 720 | }; |
| 721 | |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 722 | /* All PCI host controllers are required to disable IRQ generation |
| 723 | * at the source, so we must turn off PIRQ. |
| 724 | */ |
| 725 | pci_write_config_word(to_pci_dev(uhci_dev(uhci)), USBLEGSUP, 0); |
Alan Stern | 42245e6 | 2005-12-16 11:09:01 -0800 | [diff] [blame] | 726 | mb(); |
Benjamin Herrenschmidt | 8de9840 | 2005-11-25 09:59:46 +1100 | [diff] [blame] | 727 | clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 728 | uhci->hc_inaccessible = 1; |
Alan Stern | 1f09df8 | 2005-09-05 13:59:51 -0400 | [diff] [blame] | 729 | hcd->poll_rh = 0; |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 730 | |
| 731 | /* FIXME: Enable non-PME# remote wakeup? */ |
| 732 | |
Alan Stern | 4daaa87 | 2005-04-09 17:30:08 -0400 | [diff] [blame] | 733 | done: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 734 | spin_unlock_irq(&uhci->lock); |
Alan Stern | 4daaa87 | 2005-04-09 17:30:08 -0400 | [diff] [blame] | 735 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 736 | } |
| 737 | |
| 738 | static int uhci_resume(struct usb_hcd *hcd) |
| 739 | { |
| 740 | struct uhci_hcd *uhci = hcd_to_uhci(hcd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 741 | |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 742 | dev_dbg(uhci_dev(uhci), "%s\n", __FUNCTION__); |
| 743 | |
Alan Stern | 687f5f3 | 2005-11-30 17:16:19 -0500 | [diff] [blame] | 744 | /* Since we aren't in D3 any more, it's safe to set this flag |
| 745 | * even if the controller was dead. It might not even be dead |
| 746 | * any more, if the firmware or quirks code has reset it. |
Benjamin Herrenschmidt | 8de9840 | 2005-11-25 09:59:46 +1100 | [diff] [blame] | 747 | */ |
| 748 | set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); |
Alan Stern | 42245e6 | 2005-12-16 11:09:01 -0800 | [diff] [blame] | 749 | mb(); |
Benjamin Herrenschmidt | 8de9840 | 2005-11-25 09:59:46 +1100 | [diff] [blame] | 750 | |
Alan Stern | 4daaa87 | 2005-04-09 17:30:08 -0400 | [diff] [blame] | 751 | if (uhci->rh_state == UHCI_RH_RESET) /* Dead */ |
| 752 | return 0; |
David Brownell | be3cbc5 | 2006-06-05 12:16:39 -0400 | [diff] [blame^] | 753 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 754 | spin_lock_irq(&uhci->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 755 | |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 756 | /* FIXME: Disable non-PME# remote wakeup? */ |
| 757 | |
| 758 | uhci->hc_inaccessible = 0; |
| 759 | |
| 760 | /* The BIOS may have changed the controller settings during a |
| 761 | * system wakeup. Check it and reconfigure to avoid problems. |
| 762 | */ |
| 763 | check_and_reset_hc(uhci); |
| 764 | configure_hc(uhci); |
| 765 | |
Alan Stern | 1c50c31 | 2005-11-14 11:45:38 -0500 | [diff] [blame] | 766 | if (uhci->rh_state == UHCI_RH_RESET) { |
| 767 | |
| 768 | /* The controller had to be reset */ |
| 769 | usb_root_hub_lost_power(hcd->self.root_hub); |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 770 | suspend_rh(uhci, UHCI_RH_SUSPENDED); |
Alan Stern | 1c50c31 | 2005-11-14 11:45:38 -0500 | [diff] [blame] | 771 | } |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 772 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 773 | spin_unlock_irq(&uhci->lock); |
Alan Stern | 6c1b445 | 2005-04-21 16:04:58 -0400 | [diff] [blame] | 774 | |
Alan Stern | 1f09df8 | 2005-09-05 13:59:51 -0400 | [diff] [blame] | 775 | if (!uhci->working_RD) { |
| 776 | /* Suspended root hub needs to be polled */ |
| 777 | hcd->poll_rh = 1; |
Alan Stern | 6c1b445 | 2005-04-21 16:04:58 -0400 | [diff] [blame] | 778 | usb_hcd_poll_rh_status(hcd); |
Alan Stern | 1f09df8 | 2005-09-05 13:59:51 -0400 | [diff] [blame] | 779 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 780 | return 0; |
| 781 | } |
| 782 | #endif |
| 783 | |
Alan Stern | dccf4a4 | 2005-12-17 17:58:46 -0500 | [diff] [blame] | 784 | /* Wait until a particular device/endpoint's QH is idle, and free it */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 785 | static void uhci_hcd_endpoint_disable(struct usb_hcd *hcd, |
Alan Stern | dccf4a4 | 2005-12-17 17:58:46 -0500 | [diff] [blame] | 786 | struct usb_host_endpoint *hep) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 787 | { |
| 788 | struct uhci_hcd *uhci = hcd_to_uhci(hcd); |
Alan Stern | dccf4a4 | 2005-12-17 17:58:46 -0500 | [diff] [blame] | 789 | struct uhci_qh *qh; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 790 | |
Alan Stern | dccf4a4 | 2005-12-17 17:58:46 -0500 | [diff] [blame] | 791 | spin_lock_irq(&uhci->lock); |
| 792 | qh = (struct uhci_qh *) hep->hcpriv; |
| 793 | if (qh == NULL) |
| 794 | goto done; |
| 795 | |
| 796 | while (qh->state != QH_STATE_IDLE) { |
| 797 | ++uhci->num_waiting; |
| 798 | spin_unlock_irq(&uhci->lock); |
| 799 | wait_event_interruptible(uhci->waitqh, |
| 800 | qh->state == QH_STATE_IDLE); |
| 801 | spin_lock_irq(&uhci->lock); |
| 802 | --uhci->num_waiting; |
| 803 | } |
| 804 | |
| 805 | uhci_free_qh(uhci, qh); |
| 806 | done: |
| 807 | spin_unlock_irq(&uhci->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 808 | } |
| 809 | |
| 810 | static int uhci_hcd_get_frame_number(struct usb_hcd *hcd) |
| 811 | { |
| 812 | struct uhci_hcd *uhci = hcd_to_uhci(hcd); |
Alan Stern | c433472 | 2006-05-19 16:34:57 -0400 | [diff] [blame] | 813 | unsigned frame_number; |
| 814 | unsigned delta; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 815 | |
| 816 | /* Minimize latency by avoiding the spinlock */ |
Alan Stern | c433472 | 2006-05-19 16:34:57 -0400 | [diff] [blame] | 817 | frame_number = uhci->frame_number; |
| 818 | barrier(); |
| 819 | delta = (inw(uhci->io_addr + USBFRNUM) - frame_number) & |
| 820 | (UHCI_NUMFRAMES - 1); |
| 821 | return frame_number + delta; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 822 | } |
| 823 | |
| 824 | static const char hcd_name[] = "uhci_hcd"; |
| 825 | |
| 826 | static const struct hc_driver uhci_driver = { |
| 827 | .description = hcd_name, |
| 828 | .product_desc = "UHCI Host Controller", |
| 829 | .hcd_priv_size = sizeof(struct uhci_hcd), |
| 830 | |
| 831 | /* Generic hardware linkage */ |
| 832 | .irq = uhci_irq, |
| 833 | .flags = HCD_USB11, |
| 834 | |
| 835 | /* Basic lifecycle operations */ |
David Brownell | be3cbc5 | 2006-06-05 12:16:39 -0400 | [diff] [blame^] | 836 | .reset = uhci_init, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 837 | .start = uhci_start, |
| 838 | #ifdef CONFIG_PM |
| 839 | .suspend = uhci_suspend, |
| 840 | .resume = uhci_resume, |
Alan Stern | 0c0382e | 2005-10-13 17:08:02 -0400 | [diff] [blame] | 841 | .bus_suspend = uhci_rh_suspend, |
| 842 | .bus_resume = uhci_rh_resume, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 843 | #endif |
| 844 | .stop = uhci_stop, |
| 845 | |
| 846 | .urb_enqueue = uhci_urb_enqueue, |
| 847 | .urb_dequeue = uhci_urb_dequeue, |
| 848 | |
| 849 | .endpoint_disable = uhci_hcd_endpoint_disable, |
| 850 | .get_frame_number = uhci_hcd_get_frame_number, |
| 851 | |
| 852 | .hub_status_data = uhci_hub_status_data, |
| 853 | .hub_control = uhci_hub_control, |
| 854 | }; |
| 855 | |
| 856 | static const struct pci_device_id uhci_pci_ids[] = { { |
| 857 | /* handle any USB UHCI controller */ |
Jean Delvare | c67808e | 2006-04-09 20:07:35 +0200 | [diff] [blame] | 858 | PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_UHCI, ~0), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 859 | .driver_data = (unsigned long) &uhci_driver, |
| 860 | }, { /* end: all zeroes */ } |
| 861 | }; |
| 862 | |
| 863 | MODULE_DEVICE_TABLE(pci, uhci_pci_ids); |
| 864 | |
| 865 | static struct pci_driver uhci_pci_driver = { |
| 866 | .name = (char *)hcd_name, |
| 867 | .id_table = uhci_pci_ids, |
| 868 | |
| 869 | .probe = usb_hcd_pci_probe, |
| 870 | .remove = usb_hcd_pci_remove, |
Alan Stern | 02597d2 | 2005-04-28 14:51:27 -0400 | [diff] [blame] | 871 | .shutdown = uhci_shutdown, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 872 | |
| 873 | #ifdef CONFIG_PM |
| 874 | .suspend = usb_hcd_pci_suspend, |
| 875 | .resume = usb_hcd_pci_resume, |
| 876 | #endif /* PM */ |
| 877 | }; |
| 878 | |
| 879 | static int __init uhci_hcd_init(void) |
| 880 | { |
| 881 | int retval = -ENOMEM; |
| 882 | |
| 883 | printk(KERN_INFO DRIVER_DESC " " DRIVER_VERSION "\n"); |
| 884 | |
| 885 | if (usb_disabled()) |
| 886 | return -ENODEV; |
| 887 | |
Alan Stern | 8d402e1 | 2005-12-17 18:03:37 -0500 | [diff] [blame] | 888 | if (DEBUG_CONFIGURED) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 889 | errbuf = kmalloc(ERRBUF_LEN, GFP_KERNEL); |
| 890 | if (!errbuf) |
| 891 | goto errbuf_failed; |
Alan Stern | 8d402e1 | 2005-12-17 18:03:37 -0500 | [diff] [blame] | 892 | uhci_debugfs_root = debugfs_create_dir("uhci", NULL); |
| 893 | if (!uhci_debugfs_root) |
| 894 | goto debug_failed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 895 | } |
| 896 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 897 | uhci_up_cachep = kmem_cache_create("uhci_urb_priv", |
| 898 | sizeof(struct urb_priv), 0, 0, NULL, NULL); |
| 899 | if (!uhci_up_cachep) |
| 900 | goto up_failed; |
| 901 | |
| 902 | retval = pci_register_driver(&uhci_pci_driver); |
| 903 | if (retval) |
| 904 | goto init_failed; |
| 905 | |
| 906 | return 0; |
| 907 | |
| 908 | init_failed: |
| 909 | if (kmem_cache_destroy(uhci_up_cachep)) |
Alan Stern | 687f5f3 | 2005-11-30 17:16:19 -0500 | [diff] [blame] | 910 | warn("not all urb_privs were freed!"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 911 | |
| 912 | up_failed: |
| 913 | debugfs_remove(uhci_debugfs_root); |
| 914 | |
| 915 | debug_failed: |
Jesper Juhl | 1bc3c9e | 2005-04-18 17:39:34 -0700 | [diff] [blame] | 916 | kfree(errbuf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 917 | |
| 918 | errbuf_failed: |
| 919 | |
| 920 | return retval; |
| 921 | } |
| 922 | |
| 923 | static void __exit uhci_hcd_cleanup(void) |
| 924 | { |
| 925 | pci_unregister_driver(&uhci_pci_driver); |
| 926 | |
| 927 | if (kmem_cache_destroy(uhci_up_cachep)) |
Alan Stern | 687f5f3 | 2005-11-30 17:16:19 -0500 | [diff] [blame] | 928 | warn("not all urb_privs were freed!"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 929 | |
| 930 | debugfs_remove(uhci_debugfs_root); |
Jesper Juhl | 1bc3c9e | 2005-04-18 17:39:34 -0700 | [diff] [blame] | 931 | kfree(errbuf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 932 | } |
| 933 | |
| 934 | module_init(uhci_hcd_init); |
| 935 | module_exit(uhci_hcd_cleanup); |
| 936 | |
| 937 | MODULE_AUTHOR(DRIVER_AUTHOR); |
| 938 | MODULE_DESCRIPTION(DRIVER_DESC); |
| 939 | MODULE_LICENSE("GPL"); |