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 | 17230ac | 2007-02-19 15:52:45 -0500 | [diff] [blame] | 16 | * (C) Copyright 2004-2007 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | #include <linux/module.h> |
| 26 | #include <linux/pci.h> |
| 27 | #include <linux/kernel.h> |
| 28 | #include <linux/init.h> |
| 29 | #include <linux/delay.h> |
| 30 | #include <linux/ioport.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | #include <linux/errno.h> |
| 33 | #include <linux/unistd.h> |
| 34 | #include <linux/interrupt.h> |
| 35 | #include <linux/spinlock.h> |
| 36 | #include <linux/debugfs.h> |
| 37 | #include <linux/pm.h> |
| 38 | #include <linux/dmapool.h> |
| 39 | #include <linux/dma-mapping.h> |
| 40 | #include <linux/usb.h> |
Eric Lescouet | 27729aa | 2010-04-24 23:21:52 +0200 | [diff] [blame] | 41 | #include <linux/usb/hcd.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | #include <linux/bitops.h> |
Alan Stern | b62df45 | 2006-10-10 10:54:00 -0400 | [diff] [blame] | 43 | #include <linux/dmi.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | |
| 45 | #include <asm/uaccess.h> |
| 46 | #include <asm/io.h> |
| 47 | #include <asm/irq.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | #include "uhci-hcd.h" |
| 50 | |
| 51 | /* |
| 52 | * Version Information |
| 53 | */ |
Joe Perches | 85ee7a1 | 2011-04-23 20:38:19 -0700 | [diff] [blame] | 54 | #define DRIVER_AUTHOR \ |
| 55 | "Linus 'Frodo Rabbit' Torvalds, Johannes Erdfelt, " \ |
| 56 | "Randy Dunlap, Georg Acher, Deti Fliegl, Thomas Sailer, " \ |
| 57 | "Roman Weissgaerber, Alan Stern" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | #define DRIVER_DESC "USB Universal Host Controller Interface driver" |
| 59 | |
Alan Stern | 5f8364b | 2006-12-05 16:29:55 -0500 | [diff] [blame] | 60 | /* for flakey hardware, ignore overcurrent indicators */ |
Rusty Russell | 90ab5ee | 2012-01-13 09:32:20 +1030 | [diff] [blame] | 61 | static bool ignore_oc; |
Alan Stern | 5f8364b | 2006-12-05 16:29:55 -0500 | [diff] [blame] | 62 | module_param(ignore_oc, bool, S_IRUGO); |
| 63 | MODULE_PARM_DESC(ignore_oc, "ignore hardware overcurrent indications"); |
| 64 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | /* |
| 66 | * debug = 0, no debugging messages |
Alan Stern | 687f5f3 | 2005-11-30 17:16:19 -0500 | [diff] [blame] | 67 | * debug = 1, dump failed URBs except for stalls |
| 68 | * debug = 2, dump all failed URBs (including stalls) |
GeunSik Lim | 837cbb0 | 2009-09-07 21:39:05 +0900 | [diff] [blame] | 69 | * show all queues in /sys/kernel/debug/uhci/[pci_addr] |
Alan Stern | 687f5f3 | 2005-11-30 17:16:19 -0500 | [diff] [blame] | 70 | * debug = 3, show all TDs in URBs when dumping |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | */ |
Oliver Neukum | 1c20163 | 2013-11-18 13:23:16 +0100 | [diff] [blame] | 72 | #ifdef CONFIG_DYNAMIC_DEBUG |
Oliver Neukum | cadb375 | 2013-11-18 13:23:09 +0100 | [diff] [blame] | 73 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | static int debug = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | module_param(debug, int, S_IRUGO | S_IWUSR); |
| 76 | MODULE_PARM_DESC(debug, "Debug level"); |
Oliver Neukum | cadb375 | 2013-11-18 13:23:09 +0100 | [diff] [blame] | 77 | static char *errbuf; |
Alan Stern | 8d402e1 | 2005-12-17 18:03:37 -0500 | [diff] [blame] | 78 | |
| 79 | #else |
Oliver Neukum | cadb375 | 2013-11-18 13:23:09 +0100 | [diff] [blame] | 80 | |
| 81 | #define debug 0 |
| 82 | #define errbuf NULL |
| 83 | |
Alan Stern | 8d402e1 | 2005-12-17 18:03:37 -0500 | [diff] [blame] | 84 | #endif |
| 85 | |
Oliver Neukum | cadb375 | 2013-11-18 13:23:09 +0100 | [diff] [blame] | 86 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | #define ERRBUF_LEN (32 * 1024) |
| 88 | |
Christoph Lameter | e18b890 | 2006-12-06 20:33:20 -0800 | [diff] [blame] | 89 | static struct kmem_cache *uhci_up_cachep; /* urb_priv */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | |
Alan Stern | 6c1b445 | 2005-04-21 16:04:58 -0400 | [diff] [blame] | 91 | static void suspend_rh(struct uhci_hcd *uhci, enum uhci_rh_state new_state); |
| 92 | static void wakeup_rh(struct uhci_hcd *uhci); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | static void uhci_get_current_frame_number(struct uhci_hcd *uhci); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | |
Alan Stern | f3fe239 | 2007-01-08 12:00:28 -0500 | [diff] [blame] | 95 | /* |
| 96 | * Calculate the link pointer DMA value for the first Skeleton QH in a frame. |
| 97 | */ |
Jan Andersson | 51e2f62 | 2011-05-18 10:44:51 +0200 | [diff] [blame] | 98 | static __hc32 uhci_frame_skel_link(struct uhci_hcd *uhci, int frame) |
Alan Stern | f3fe239 | 2007-01-08 12:00:28 -0500 | [diff] [blame] | 99 | { |
| 100 | int skelnum; |
| 101 | |
| 102 | /* |
| 103 | * The interrupt queues will be interleaved as evenly as possible. |
| 104 | * There's not much to be done about period-1 interrupts; they have |
| 105 | * to occur in every frame. But we can schedule period-2 interrupts |
| 106 | * in odd-numbered frames, period-4 interrupts in frames congruent |
| 107 | * to 2 (mod 4), and so on. This way each frame only has two |
| 108 | * interrupt QHs, which will help spread out bandwidth utilization. |
| 109 | * |
| 110 | * ffs (Find First bit Set) does exactly what we need: |
Alan Stern | 17230ac | 2007-02-19 15:52:45 -0500 | [diff] [blame] | 111 | * 1,3,5,... => ffs = 0 => use period-2 QH = skelqh[8], |
| 112 | * 2,6,10,... => ffs = 1 => use period-4 QH = skelqh[7], etc. |
Alan Stern | f3fe239 | 2007-01-08 12:00:28 -0500 | [diff] [blame] | 113 | * ffs >= 7 => not on any high-period queue, so use |
Alan Stern | 17230ac | 2007-02-19 15:52:45 -0500 | [diff] [blame] | 114 | * period-1 QH = skelqh[9]. |
Alan Stern | f3fe239 | 2007-01-08 12:00:28 -0500 | [diff] [blame] | 115 | * Add in UHCI_NUMFRAMES to insure at least one bit is set. |
| 116 | */ |
| 117 | skelnum = 8 - (int) __ffs(frame | UHCI_NUMFRAMES); |
| 118 | if (skelnum <= 1) |
| 119 | skelnum = 9; |
Jan Andersson | 51e2f62 | 2011-05-18 10:44:51 +0200 | [diff] [blame] | 120 | return LINK_TO_QH(uhci, uhci->skelqh[skelnum]); |
Alan Stern | f3fe239 | 2007-01-08 12:00:28 -0500 | [diff] [blame] | 121 | } |
| 122 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | #include "uhci-debug.c" |
| 124 | #include "uhci-q.c" |
Alan Stern | 1f09df8 | 2005-09-05 13:59:51 -0400 | [diff] [blame] | 125 | #include "uhci-hub.c" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 127 | /* |
Alan Stern | bb200f6 | 2005-10-03 16:36:29 -0400 | [diff] [blame] | 128 | * Finish up a host controller reset and update the recorded state. |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 129 | */ |
Alan Stern | bb200f6 | 2005-10-03 16:36:29 -0400 | [diff] [blame] | 130 | static void finish_reset(struct uhci_hcd *uhci) |
Alan Stern | 014e73c | 2005-04-09 17:24:42 -0400 | [diff] [blame] | 131 | { |
Alan Stern | c074b41 | 2005-04-22 14:39:12 -0400 | [diff] [blame] | 132 | int port; |
| 133 | |
Alan Stern | c074b41 | 2005-04-22 14:39:12 -0400 | [diff] [blame] | 134 | /* HCRESET doesn't affect the Suspend, Reset, and Resume Detect |
| 135 | * bits in the port status and control registers. |
| 136 | * We have to clear them by hand. |
| 137 | */ |
| 138 | for (port = 0; port < uhci->rh_numports; ++port) |
Jan Andersson | 9faa091 | 2011-05-06 12:00:16 +0200 | [diff] [blame] | 139 | uhci_writew(uhci, 0, USBPORTSC1 + (port * 2)); |
Alan Stern | c074b41 | 2005-04-22 14:39:12 -0400 | [diff] [blame] | 140 | |
Alan Stern | 8e32640 | 2006-04-04 14:47:44 -0400 | [diff] [blame] | 141 | uhci->port_c_suspend = uhci->resuming_ports = 0; |
Alan Stern | c8f4fe4 | 2005-04-09 17:27:32 -0400 | [diff] [blame] | 142 | uhci->rh_state = UHCI_RH_RESET; |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 143 | uhci->is_stopped = UHCI_IS_STOPPED; |
Alan Stern | 541c7d4 | 2010-06-22 16:39:10 -0400 | [diff] [blame] | 144 | clear_bit(HCD_FLAG_POLL_RH, &uhci_to_hcd(uhci)->flags); |
Alan Stern | 014e73c | 2005-04-09 17:24:42 -0400 | [diff] [blame] | 145 | } |
| 146 | |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 147 | /* |
Alan Stern | 4daaa87 | 2005-04-09 17:30:08 -0400 | [diff] [blame] | 148 | * Last rites for a defunct/nonfunctional controller |
Alan Stern | 02597d2 | 2005-04-28 14:51:27 -0400 | [diff] [blame] | 149 | * or one we don't want to use any more. |
Alan Stern | 4daaa87 | 2005-04-09 17:30:08 -0400 | [diff] [blame] | 150 | */ |
Alan Stern | e323de4 | 2006-06-05 12:21:30 -0400 | [diff] [blame] | 151 | static void uhci_hc_died(struct uhci_hcd *uhci) |
Alan Stern | 4daaa87 | 2005-04-09 17:30:08 -0400 | [diff] [blame] | 152 | { |
Alan Stern | e323de4 | 2006-06-05 12:21:30 -0400 | [diff] [blame] | 153 | uhci_get_current_frame_number(uhci); |
Jan Andersson | e7652e1 | 2011-05-06 12:00:13 +0200 | [diff] [blame] | 154 | uhci->reset_hc(uhci); |
Alan Stern | bb200f6 | 2005-10-03 16:36:29 -0400 | [diff] [blame] | 155 | finish_reset(uhci); |
Alan Stern | e323de4 | 2006-06-05 12:21:30 -0400 | [diff] [blame] | 156 | uhci->dead = 1; |
| 157 | |
| 158 | /* The current frame may already be partway finished */ |
| 159 | ++uhci->frame_number; |
Alan Stern | 4daaa87 | 2005-04-09 17:30:08 -0400 | [diff] [blame] | 160 | } |
| 161 | |
| 162 | /* |
David Brownell | be3cbc5 | 2006-06-05 12:16:39 -0400 | [diff] [blame] | 163 | * Initialize a controller that was newly discovered or has lost power |
| 164 | * or otherwise been reset while it was suspended. In none of these cases |
| 165 | * can we be sure of its previous state. |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 166 | */ |
| 167 | static void check_and_reset_hc(struct uhci_hcd *uhci) |
| 168 | { |
Jan Andersson | e7652e1 | 2011-05-06 12:00:13 +0200 | [diff] [blame] | 169 | if (uhci->check_and_reset_hc(uhci)) |
Alan Stern | bb200f6 | 2005-10-03 16:36:29 -0400 | [diff] [blame] | 170 | finish_reset(uhci); |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 171 | } |
| 172 | |
Jan Andersson | d3219d1 | 2011-05-06 12:00:17 +0200 | [diff] [blame] | 173 | #if defined(CONFIG_USB_UHCI_SUPPORT_NON_PCI_HC) |
| 174 | /* |
| 175 | * The two functions below are generic reset functions that are used on systems |
| 176 | * that do not have keyboard and mouse legacy support. We assume that we are |
| 177 | * running on such a system if CONFIG_USB_UHCI_SUPPORT_NON_PCI_HC is defined. |
| 178 | */ |
| 179 | |
| 180 | /* |
| 181 | * Make sure the controller is completely inactive, unable to |
| 182 | * generate interrupts or do DMA. |
| 183 | */ |
| 184 | static void uhci_generic_reset_hc(struct uhci_hcd *uhci) |
| 185 | { |
| 186 | /* Reset the HC - this will force us to get a |
| 187 | * new notification of any already connected |
| 188 | * ports due to the virtual disconnect that it |
| 189 | * implies. |
| 190 | */ |
| 191 | uhci_writew(uhci, USBCMD_HCRESET, USBCMD); |
| 192 | mb(); |
| 193 | udelay(5); |
| 194 | if (uhci_readw(uhci, USBCMD) & USBCMD_HCRESET) |
| 195 | dev_warn(uhci_dev(uhci), "HCRESET not completed yet!\n"); |
| 196 | |
| 197 | /* Just to be safe, disable interrupt requests and |
| 198 | * make sure the controller is stopped. |
| 199 | */ |
| 200 | uhci_writew(uhci, 0, USBINTR); |
| 201 | uhci_writew(uhci, 0, USBCMD); |
| 202 | } |
| 203 | |
| 204 | /* |
| 205 | * Initialize a controller that was newly discovered or has just been |
| 206 | * resumed. In either case we can't be sure of its previous state. |
| 207 | * |
| 208 | * Returns: 1 if the controller was reset, 0 otherwise. |
| 209 | */ |
| 210 | static int uhci_generic_check_and_reset_hc(struct uhci_hcd *uhci) |
| 211 | { |
| 212 | unsigned int cmd, intr; |
| 213 | |
| 214 | /* |
| 215 | * When restarting a suspended controller, we expect all the |
| 216 | * settings to be the same as we left them: |
| 217 | * |
| 218 | * Controller is stopped and configured with EGSM set; |
| 219 | * No interrupts enabled except possibly Resume Detect. |
| 220 | * |
| 221 | * If any of these conditions are violated we do a complete reset. |
| 222 | */ |
| 223 | |
| 224 | cmd = uhci_readw(uhci, USBCMD); |
| 225 | if ((cmd & USBCMD_RS) || !(cmd & USBCMD_CF) || !(cmd & USBCMD_EGSM)) { |
| 226 | dev_dbg(uhci_dev(uhci), "%s: cmd = 0x%04x\n", |
| 227 | __func__, cmd); |
| 228 | goto reset_needed; |
| 229 | } |
| 230 | |
| 231 | intr = uhci_readw(uhci, USBINTR); |
| 232 | if (intr & (~USBINTR_RESUME)) { |
| 233 | dev_dbg(uhci_dev(uhci), "%s: intr = 0x%04x\n", |
| 234 | __func__, intr); |
| 235 | goto reset_needed; |
| 236 | } |
| 237 | return 0; |
| 238 | |
| 239 | reset_needed: |
| 240 | dev_dbg(uhci_dev(uhci), "Performing full reset\n"); |
| 241 | uhci_generic_reset_hc(uhci); |
| 242 | return 1; |
| 243 | } |
| 244 | #endif /* CONFIG_USB_UHCI_SUPPORT_NON_PCI_HC */ |
| 245 | |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 246 | /* |
| 247 | * Store the basic register settings needed by the controller. |
| 248 | */ |
| 249 | static void configure_hc(struct uhci_hcd *uhci) |
| 250 | { |
| 251 | /* Set the frame length to the default: 1 ms exactly */ |
Jan Andersson | 9faa091 | 2011-05-06 12:00:16 +0200 | [diff] [blame] | 252 | uhci_writeb(uhci, USBSOF_DEFAULT, USBSOF); |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 253 | |
| 254 | /* Store the frame list base address */ |
Jan Andersson | 9faa091 | 2011-05-06 12:00:16 +0200 | [diff] [blame] | 255 | uhci_writel(uhci, uhci->frame_dma_handle, USBFLBASEADD); |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 256 | |
| 257 | /* Set the current frame number */ |
Jan Andersson | 9faa091 | 2011-05-06 12:00:16 +0200 | [diff] [blame] | 258 | uhci_writew(uhci, uhci->frame_number & UHCI_MAX_SOF_NUMBER, |
| 259 | USBFRNUM); |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 260 | |
Jan Andersson | e7652e1 | 2011-05-06 12:00:13 +0200 | [diff] [blame] | 261 | /* perform any arch/bus specific configuration */ |
| 262 | if (uhci->configure_hc) |
| 263 | uhci->configure_hc(uhci); |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 264 | } |
| 265 | |
Alan Stern | c8f4fe4 | 2005-04-09 17:27:32 -0400 | [diff] [blame] | 266 | static int resume_detect_interrupts_are_broken(struct uhci_hcd *uhci) |
Alan Stern | 014e73c | 2005-04-09 17:24:42 -0400 | [diff] [blame] | 267 | { |
Alan Stern | 5f8364b | 2006-12-05 16:29:55 -0500 | [diff] [blame] | 268 | /* If we have to ignore overcurrent events then almost by definition |
| 269 | * we can't depend on resume-detect interrupts. */ |
| 270 | if (ignore_oc) |
| 271 | return 1; |
| 272 | |
Jan Andersson | e7652e1 | 2011-05-06 12:00:13 +0200 | [diff] [blame] | 273 | return uhci->resume_detect_interrupts_are_broken ? |
| 274 | uhci->resume_detect_interrupts_are_broken(uhci) : 0; |
Alan Stern | c8f4fe4 | 2005-04-09 17:27:32 -0400 | [diff] [blame] | 275 | } |
| 276 | |
Alan Stern | d8f12ab | 2008-04-22 10:49:15 -0400 | [diff] [blame] | 277 | static int global_suspend_mode_is_broken(struct uhci_hcd *uhci) |
Alan Stern | b62df45 | 2006-10-10 10:54:00 -0400 | [diff] [blame] | 278 | { |
Jan Andersson | e7652e1 | 2011-05-06 12:00:13 +0200 | [diff] [blame] | 279 | return uhci->global_suspend_mode_is_broken ? |
| 280 | uhci->global_suspend_mode_is_broken(uhci) : 0; |
Alan Stern | b62df45 | 2006-10-10 10:54:00 -0400 | [diff] [blame] | 281 | } |
| 282 | |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 283 | 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] | 284 | __releases(uhci->lock) |
| 285 | __acquires(uhci->lock) |
| 286 | { |
| 287 | int auto_stop; |
Alan Stern | d8f12ab | 2008-04-22 10:49:15 -0400 | [diff] [blame] | 288 | int int_enable, egsm_enable, wakeup_enable; |
Alan Stern | 58a97ff | 2008-04-14 12:17:10 -0400 | [diff] [blame] | 289 | struct usb_device *rhdev = uhci_to_hcd(uhci)->self.root_hub; |
Alan Stern | c8f4fe4 | 2005-04-09 17:27:32 -0400 | [diff] [blame] | 290 | |
| 291 | auto_stop = (new_state == UHCI_RH_AUTO_STOPPED); |
Alan Stern | 58a97ff | 2008-04-14 12:17:10 -0400 | [diff] [blame] | 292 | dev_dbg(&rhdev->dev, "%s%s\n", __func__, |
Alan Stern | c8f4fe4 | 2005-04-09 17:27:32 -0400 | [diff] [blame] | 293 | (auto_stop ? " (auto-stop)" : "")); |
| 294 | |
Alan Stern | d8f12ab | 2008-04-22 10:49:15 -0400 | [diff] [blame] | 295 | /* Start off by assuming Resume-Detect interrupts and EGSM work |
| 296 | * and that remote wakeups should be enabled. |
Alan Stern | c8f4fe4 | 2005-04-09 17:27:32 -0400 | [diff] [blame] | 297 | */ |
Alan Stern | b62df45 | 2006-10-10 10:54:00 -0400 | [diff] [blame] | 298 | egsm_enable = USBCMD_EGSM; |
Alan Stern | 1f09df8 | 2005-09-05 13:59:51 -0400 | [diff] [blame] | 299 | int_enable = USBINTR_RESUME; |
Alan Stern | d8f12ab | 2008-04-22 10:49:15 -0400 | [diff] [blame] | 300 | wakeup_enable = 1; |
| 301 | |
Alan Stern | 5c12e78 | 2011-09-26 11:25:26 -0400 | [diff] [blame] | 302 | /* |
| 303 | * In auto-stop mode, we must be able to detect new connections. |
| 304 | * The user can force us to poll by disabling remote wakeup; |
| 305 | * otherwise we will use the EGSM/RD mechanism. |
Alan Stern | d8f12ab | 2008-04-22 10:49:15 -0400 | [diff] [blame] | 306 | */ |
| 307 | if (auto_stop) { |
| 308 | if (!device_may_wakeup(&rhdev->dev)) |
Alan Stern | 5c12e78 | 2011-09-26 11:25:26 -0400 | [diff] [blame] | 309 | egsm_enable = int_enable = 0; |
Alan Stern | d8f12ab | 2008-04-22 10:49:15 -0400 | [diff] [blame] | 310 | } |
| 311 | |
Alan Stern | 5c12e78 | 2011-09-26 11:25:26 -0400 | [diff] [blame] | 312 | #ifdef CONFIG_PM |
| 313 | /* |
| 314 | * In bus-suspend mode, we use the wakeup setting specified |
| 315 | * for the root hub. |
Alan Stern | d8f12ab | 2008-04-22 10:49:15 -0400 | [diff] [blame] | 316 | */ |
Alan Stern | 5c12e78 | 2011-09-26 11:25:26 -0400 | [diff] [blame] | 317 | else { |
| 318 | if (!rhdev->do_remote_wakeup) |
| 319 | wakeup_enable = 0; |
| 320 | } |
| 321 | #endif |
Alan Stern | d8f12ab | 2008-04-22 10:49:15 -0400 | [diff] [blame] | 322 | |
Alan Stern | 5c12e78 | 2011-09-26 11:25:26 -0400 | [diff] [blame] | 323 | /* |
| 324 | * UHCI doesn't distinguish between wakeup requests from downstream |
| 325 | * devices and local connect/disconnect events. There's no way to |
| 326 | * enable one without the other; both are controlled by EGSM. Thus |
| 327 | * if wakeups are disallowed then EGSM must be turned off -- in which |
| 328 | * case remote wakeup requests from downstream during system sleep |
| 329 | * will be lost. |
Alan Stern | d8f12ab | 2008-04-22 10:49:15 -0400 | [diff] [blame] | 330 | * |
Alan Stern | 5c12e78 | 2011-09-26 11:25:26 -0400 | [diff] [blame] | 331 | * In addition, if EGSM is broken then we can't use it. Likewise, |
| 332 | * if Resume-Detect interrupts are broken then we can't use them. |
| 333 | * |
| 334 | * Finally, neither EGSM nor RD is useful by itself. Without EGSM, |
| 335 | * the RD status bit will never get set. Without RD, the controller |
| 336 | * won't generate interrupts to tell the system about wakeup events. |
Alan Stern | d8f12ab | 2008-04-22 10:49:15 -0400 | [diff] [blame] | 337 | */ |
Alan Stern | 5c12e78 | 2011-09-26 11:25:26 -0400 | [diff] [blame] | 338 | if (!wakeup_enable || global_suspend_mode_is_broken(uhci) || |
| 339 | resume_detect_interrupts_are_broken(uhci)) |
| 340 | egsm_enable = int_enable = 0; |
Alan Stern | b62df45 | 2006-10-10 10:54:00 -0400 | [diff] [blame] | 341 | |
Alan Stern | 5c12e78 | 2011-09-26 11:25:26 -0400 | [diff] [blame] | 342 | uhci->RD_enable = !!int_enable; |
Jan Andersson | 9faa091 | 2011-05-06 12:00:16 +0200 | [diff] [blame] | 343 | uhci_writew(uhci, int_enable, USBINTR); |
| 344 | uhci_writew(uhci, egsm_enable | USBCMD_CF, USBCMD); |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 345 | mb(); |
Alan Stern | c8f4fe4 | 2005-04-09 17:27:32 -0400 | [diff] [blame] | 346 | udelay(5); |
| 347 | |
| 348 | /* If we're auto-stopping then no devices have been attached |
| 349 | * for a while, so there shouldn't be any active URBs and the |
| 350 | * controller should stop after a few microseconds. Otherwise |
| 351 | * we will give the controller one frame to stop. |
| 352 | */ |
Jan Andersson | 9faa091 | 2011-05-06 12:00:16 +0200 | [diff] [blame] | 353 | if (!auto_stop && !(uhci_readw(uhci, USBSTS) & USBSTS_HCH)) { |
Alan Stern | c8f4fe4 | 2005-04-09 17:27:32 -0400 | [diff] [blame] | 354 | uhci->rh_state = UHCI_RH_SUSPENDING; |
| 355 | spin_unlock_irq(&uhci->lock); |
| 356 | msleep(1); |
| 357 | spin_lock_irq(&uhci->lock); |
Alan Stern | e323de4 | 2006-06-05 12:21:30 -0400 | [diff] [blame] | 358 | if (uhci->dead) |
Alan Stern | 4daaa87 | 2005-04-09 17:30:08 -0400 | [diff] [blame] | 359 | return; |
Alan Stern | c8f4fe4 | 2005-04-09 17:27:32 -0400 | [diff] [blame] | 360 | } |
Jan Andersson | 9faa091 | 2011-05-06 12:00:16 +0200 | [diff] [blame] | 361 | if (!(uhci_readw(uhci, USBSTS) & USBSTS_HCH)) |
Alan Stern | 58a97ff | 2008-04-14 12:17:10 -0400 | [diff] [blame] | 362 | dev_warn(uhci_dev(uhci), "Controller not stopped yet!\n"); |
Alan Stern | c8f4fe4 | 2005-04-09 17:27:32 -0400 | [diff] [blame] | 363 | |
Alan Stern | 014e73c | 2005-04-09 17:24:42 -0400 | [diff] [blame] | 364 | uhci_get_current_frame_number(uhci); |
Alan Stern | c8f4fe4 | 2005-04-09 17:27:32 -0400 | [diff] [blame] | 365 | |
| 366 | uhci->rh_state = new_state; |
Alan Stern | 014e73c | 2005-04-09 17:24:42 -0400 | [diff] [blame] | 367 | uhci->is_stopped = UHCI_IS_STOPPED; |
Alan Stern | d8f12ab | 2008-04-22 10:49:15 -0400 | [diff] [blame] | 368 | |
Alan Stern | 5c12e78 | 2011-09-26 11:25:26 -0400 | [diff] [blame] | 369 | /* |
| 370 | * If remote wakeup is enabled but either EGSM or RD interrupts |
| 371 | * doesn't work, then we won't get an interrupt when a wakeup event |
| 372 | * occurs. Thus the suspended root hub needs to be polled. |
Alan Stern | d8f12ab | 2008-04-22 10:49:15 -0400 | [diff] [blame] | 373 | */ |
Alan Stern | 5c12e78 | 2011-09-26 11:25:26 -0400 | [diff] [blame] | 374 | if (wakeup_enable && (!int_enable || !egsm_enable)) |
Alan Stern | 541c7d4 | 2010-06-22 16:39:10 -0400 | [diff] [blame] | 375 | set_bit(HCD_FLAG_POLL_RH, &uhci_to_hcd(uhci)->flags); |
| 376 | else |
| 377 | clear_bit(HCD_FLAG_POLL_RH, &uhci_to_hcd(uhci)->flags); |
Alan Stern | 014e73c | 2005-04-09 17:24:42 -0400 | [diff] [blame] | 378 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 379 | uhci_scan_schedule(uhci); |
Alan Stern | 84afddd | 2006-05-12 11:35:45 -0400 | [diff] [blame] | 380 | uhci_fsbr_off(uhci); |
Alan Stern | 014e73c | 2005-04-09 17:24:42 -0400 | [diff] [blame] | 381 | } |
| 382 | |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 383 | static void start_rh(struct uhci_hcd *uhci) |
| 384 | { |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 385 | uhci->is_stopped = 0; |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 386 | |
| 387 | /* Mark it configured and running with a 64-byte max packet. |
| 388 | * All interrupts are enabled, even though RESUME won't do anything. |
| 389 | */ |
Jan Andersson | 9faa091 | 2011-05-06 12:00:16 +0200 | [diff] [blame] | 390 | uhci_writew(uhci, USBCMD_RS | USBCMD_CF | USBCMD_MAXP, USBCMD); |
| 391 | uhci_writew(uhci, USBINTR_TIMEOUT | USBINTR_RESUME | |
| 392 | USBINTR_IOC | USBINTR_SP, USBINTR); |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 393 | mb(); |
Alan Stern | 6c1b445 | 2005-04-21 16:04:58 -0400 | [diff] [blame] | 394 | uhci->rh_state = UHCI_RH_RUNNING; |
Alan Stern | 541c7d4 | 2010-06-22 16:39:10 -0400 | [diff] [blame] | 395 | set_bit(HCD_FLAG_POLL_RH, &uhci_to_hcd(uhci)->flags); |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 396 | } |
| 397 | |
| 398 | static void wakeup_rh(struct uhci_hcd *uhci) |
Alan Stern | c8f4fe4 | 2005-04-09 17:27:32 -0400 | [diff] [blame] | 399 | __releases(uhci->lock) |
| 400 | __acquires(uhci->lock) |
Alan Stern | 014e73c | 2005-04-09 17:24:42 -0400 | [diff] [blame] | 401 | { |
David Brownell | be3cbc5 | 2006-06-05 12:16:39 -0400 | [diff] [blame] | 402 | dev_dbg(&uhci_to_hcd(uhci)->self.root_hub->dev, |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 403 | "%s%s\n", __func__, |
Alan Stern | c8f4fe4 | 2005-04-09 17:27:32 -0400 | [diff] [blame] | 404 | uhci->rh_state == UHCI_RH_AUTO_STOPPED ? |
| 405 | " (auto-start)" : ""); |
Alan Stern | 014e73c | 2005-04-09 17:24:42 -0400 | [diff] [blame] | 406 | |
Alan Stern | c8f4fe4 | 2005-04-09 17:27:32 -0400 | [diff] [blame] | 407 | /* If we are auto-stopped then no devices are attached so there's |
| 408 | * no need for wakeup signals. Otherwise we send Global Resume |
| 409 | * for 20 ms. |
| 410 | */ |
| 411 | if (uhci->rh_state == UHCI_RH_SUSPENDED) { |
Alan Stern | d8f12ab | 2008-04-22 10:49:15 -0400 | [diff] [blame] | 412 | unsigned egsm; |
| 413 | |
| 414 | /* Keep EGSM on if it was set before */ |
Jan Andersson | 9faa091 | 2011-05-06 12:00:16 +0200 | [diff] [blame] | 415 | egsm = uhci_readw(uhci, USBCMD) & USBCMD_EGSM; |
Alan Stern | c8f4fe4 | 2005-04-09 17:27:32 -0400 | [diff] [blame] | 416 | uhci->rh_state = UHCI_RH_RESUMING; |
Jan Andersson | 9faa091 | 2011-05-06 12:00:16 +0200 | [diff] [blame] | 417 | uhci_writew(uhci, USBCMD_FGR | USBCMD_CF | egsm, USBCMD); |
Alan Stern | c8f4fe4 | 2005-04-09 17:27:32 -0400 | [diff] [blame] | 418 | spin_unlock_irq(&uhci->lock); |
| 419 | msleep(20); |
| 420 | spin_lock_irq(&uhci->lock); |
Alan Stern | e323de4 | 2006-06-05 12:21:30 -0400 | [diff] [blame] | 421 | if (uhci->dead) |
Alan Stern | 4daaa87 | 2005-04-09 17:30:08 -0400 | [diff] [blame] | 422 | return; |
Alan Stern | 014e73c | 2005-04-09 17:24:42 -0400 | [diff] [blame] | 423 | |
Alan Stern | c8f4fe4 | 2005-04-09 17:27:32 -0400 | [diff] [blame] | 424 | /* End Global Resume and wait for EOP to be sent */ |
Jan Andersson | 9faa091 | 2011-05-06 12:00:16 +0200 | [diff] [blame] | 425 | uhci_writew(uhci, USBCMD_CF, USBCMD); |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 426 | mb(); |
Alan Stern | c8f4fe4 | 2005-04-09 17:27:32 -0400 | [diff] [blame] | 427 | udelay(4); |
Jan Andersson | 9faa091 | 2011-05-06 12:00:16 +0200 | [diff] [blame] | 428 | if (uhci_readw(uhci, USBCMD) & USBCMD_FGR) |
Alan Stern | c8f4fe4 | 2005-04-09 17:27:32 -0400 | [diff] [blame] | 429 | dev_warn(uhci_dev(uhci), "FGR not stopped yet!\n"); |
Alan Stern | 014e73c | 2005-04-09 17:24:42 -0400 | [diff] [blame] | 430 | } |
Alan Stern | c8f4fe4 | 2005-04-09 17:27:32 -0400 | [diff] [blame] | 431 | |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 432 | start_rh(uhci); |
Alan Stern | 014e73c | 2005-04-09 17:24:42 -0400 | [diff] [blame] | 433 | |
Alan Stern | 6c1b445 | 2005-04-21 16:04:58 -0400 | [diff] [blame] | 434 | /* Restart root hub polling */ |
| 435 | mod_timer(&uhci_to_hcd(uhci)->rh_timer, jiffies); |
Alan Stern | 014e73c | 2005-04-09 17:24:42 -0400 | [diff] [blame] | 436 | } |
| 437 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 438 | static irqreturn_t uhci_irq(struct usb_hcd *hcd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | { |
| 440 | struct uhci_hcd *uhci = hcd_to_uhci(hcd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 441 | unsigned short status; |
| 442 | |
| 443 | /* |
| 444 | * Read the interrupt status, and write it back to clear the |
| 445 | * interrupt cause. Contrary to the UHCI specification, the |
| 446 | * "HC Halted" status bit is persistent: it is RO, not R/WC. |
| 447 | */ |
Jan Andersson | 9faa091 | 2011-05-06 12:00:16 +0200 | [diff] [blame] | 448 | status = uhci_readw(uhci, USBSTS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | if (!(status & ~USBSTS_HCH)) /* shared interrupt, not mine */ |
| 450 | return IRQ_NONE; |
Jan Andersson | 9faa091 | 2011-05-06 12:00:16 +0200 | [diff] [blame] | 451 | uhci_writew(uhci, status, USBSTS); /* Clear it */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | |
Alan Stern | 0f815a0 | 2013-01-22 11:37:35 -0500 | [diff] [blame] | 453 | spin_lock(&uhci->lock); |
| 454 | if (unlikely(!uhci->is_initialized)) /* not yet configured */ |
| 455 | goto done; |
| 456 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | if (status & ~(USBSTS_USBINT | USBSTS_ERROR | USBSTS_RD)) { |
| 458 | if (status & USBSTS_HSE) |
Chen Gang | 3171fca | 2013-01-24 09:41:45 +0800 | [diff] [blame] | 459 | dev_err(uhci_dev(uhci), |
| 460 | "host system error, PCI problems?\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | if (status & USBSTS_HCPE) |
Chen Gang | 3171fca | 2013-01-24 09:41:45 +0800 | [diff] [blame] | 462 | dev_err(uhci_dev(uhci), |
| 463 | "host controller process error, something bad happened!\n"); |
Alan Stern | 4daaa87 | 2005-04-09 17:30:08 -0400 | [diff] [blame] | 464 | if (status & USBSTS_HCH) { |
Alan Stern | 4daaa87 | 2005-04-09 17:30:08 -0400 | [diff] [blame] | 465 | if (uhci->rh_state >= UHCI_RH_RUNNING) { |
| 466 | dev_err(uhci_dev(uhci), |
Chen Gang | 3171fca | 2013-01-24 09:41:45 +0800 | [diff] [blame] | 467 | "host controller halted, very bad!\n"); |
Alan Stern | 8d402e1 | 2005-12-17 18:03:37 -0500 | [diff] [blame] | 468 | if (debug > 1 && errbuf) { |
| 469 | /* Print the schedule for debugging */ |
Chen Gang | 13996ca | 2013-01-23 16:13:41 +0800 | [diff] [blame] | 470 | uhci_sprint_schedule(uhci, errbuf, |
| 471 | ERRBUF_LEN - EXTRA_SPACE); |
Alan Stern | 8d402e1 | 2005-12-17 18:03:37 -0500 | [diff] [blame] | 472 | lprintk(errbuf); |
| 473 | } |
Alan Stern | e323de4 | 2006-06-05 12:21:30 -0400 | [diff] [blame] | 474 | uhci_hc_died(uhci); |
Alan Stern | 7d670a2 | 2011-04-05 13:36:04 -0400 | [diff] [blame] | 475 | usb_hc_died(hcd); |
Alan Stern | 1f09df8 | 2005-09-05 13:59:51 -0400 | [diff] [blame] | 476 | |
| 477 | /* Force a callback in case there are |
| 478 | * pending unlinks */ |
| 479 | mod_timer(&hcd->rh_timer, jiffies); |
Alan Stern | 4daaa87 | 2005-04-09 17:30:08 -0400 | [diff] [blame] | 480 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | } |
| 482 | } |
| 483 | |
Alan Stern | 0f815a0 | 2013-01-22 11:37:35 -0500 | [diff] [blame] | 484 | if (status & USBSTS_RD) { |
| 485 | spin_unlock(&uhci->lock); |
Alan Stern | 6c1b445 | 2005-04-21 16:04:58 -0400 | [diff] [blame] | 486 | usb_hcd_poll_rh_status(hcd); |
Alan Stern | 0f815a0 | 2013-01-22 11:37:35 -0500 | [diff] [blame] | 487 | } else { |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 488 | uhci_scan_schedule(uhci); |
Alan Stern | 0f815a0 | 2013-01-22 11:37:35 -0500 | [diff] [blame] | 489 | done: |
Alan Stern | 442258e | 2007-12-06 14:47:08 -0500 | [diff] [blame] | 490 | spin_unlock(&uhci->lock); |
Alan Stern | 1f09df8 | 2005-09-05 13:59:51 -0400 | [diff] [blame] | 491 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | |
| 493 | return IRQ_HANDLED; |
| 494 | } |
| 495 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | /* |
| 497 | * Store the current frame number in uhci->frame_number if the controller |
Justin P. Mattock | 06125be | 2011-02-26 20:33:57 -0800 | [diff] [blame] | 498 | * is running. Expand from 11 bits (of which we use only 10) to a |
Alan Stern | c433472 | 2006-05-19 16:34:57 -0400 | [diff] [blame] | 499 | * full-sized integer. |
| 500 | * |
| 501 | * Like many other parts of the driver, this code relies on being polled |
| 502 | * more than once per second as long as the controller is running. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | */ |
| 504 | static void uhci_get_current_frame_number(struct uhci_hcd *uhci) |
| 505 | { |
Alan Stern | c433472 | 2006-05-19 16:34:57 -0400 | [diff] [blame] | 506 | if (!uhci->is_stopped) { |
| 507 | unsigned delta; |
| 508 | |
Jan Andersson | 9faa091 | 2011-05-06 12:00:16 +0200 | [diff] [blame] | 509 | delta = (uhci_readw(uhci, USBFRNUM) - uhci->frame_number) & |
Alan Stern | c433472 | 2006-05-19 16:34:57 -0400 | [diff] [blame] | 510 | (UHCI_NUMFRAMES - 1); |
| 511 | uhci->frame_number += delta; |
| 512 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | } |
| 514 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | /* |
| 516 | * De-allocate all resources |
| 517 | */ |
| 518 | static void release_uhci(struct uhci_hcd *uhci) |
| 519 | { |
| 520 | int i; |
| 521 | |
Alan Stern | 8d402e1 | 2005-12-17 18:03:37 -0500 | [diff] [blame] | 522 | |
Oliver Neukum | cadb375 | 2013-11-18 13:23:09 +0100 | [diff] [blame] | 523 | spin_lock_irq(&uhci->lock); |
| 524 | uhci->is_initialized = 0; |
| 525 | spin_unlock_irq(&uhci->lock); |
| 526 | |
| 527 | debugfs_remove(uhci->dentry); |
Alan Stern | 8d402e1 | 2005-12-17 18:03:37 -0500 | [diff] [blame] | 528 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | for (i = 0; i < UHCI_NUM_SKELQH; i++) |
Alan Stern | 8b4cd42 | 2005-09-16 14:17:45 -0400 | [diff] [blame] | 530 | uhci_free_qh(uhci, uhci->skelqh[i]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | |
Alan Stern | 8b4cd42 | 2005-09-16 14:17:45 -0400 | [diff] [blame] | 532 | uhci_free_td(uhci, uhci->term_td); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 533 | |
Alan Stern | 8b4cd42 | 2005-09-16 14:17:45 -0400 | [diff] [blame] | 534 | dma_pool_destroy(uhci->qh_pool); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | |
Alan Stern | 8b4cd42 | 2005-09-16 14:17:45 -0400 | [diff] [blame] | 536 | dma_pool_destroy(uhci->td_pool); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | |
Alan Stern | a1d59ce | 2005-09-16 14:22:51 -0400 | [diff] [blame] | 538 | kfree(uhci->frame_cpu); |
| 539 | |
| 540 | dma_free_coherent(uhci_dev(uhci), |
| 541 | UHCI_NUMFRAMES * sizeof(*uhci->frame), |
| 542 | uhci->frame, uhci->frame_dma_handle); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 543 | } |
| 544 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 545 | /* |
| 546 | * Allocate a frame list, and then setup the skeleton |
| 547 | * |
| 548 | * The hardware doesn't really know any difference |
| 549 | * in the queues, but the order does matter for the |
Alan Stern | 17230ac | 2007-02-19 15:52:45 -0500 | [diff] [blame] | 550 | * protocols higher up. The order in which the queues |
| 551 | * are encountered by the hardware is: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 552 | * |
Alan Stern | 17230ac | 2007-02-19 15:52:45 -0500 | [diff] [blame] | 553 | * - All isochronous events are handled before any |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | * of the queues. We don't do that here, because |
| 555 | * we'll create the actual TD entries on demand. |
Alan Stern | 17230ac | 2007-02-19 15:52:45 -0500 | [diff] [blame] | 556 | * - The first queue is the high-period interrupt queue. |
| 557 | * - The second queue is the period-1 interrupt and async |
| 558 | * (low-speed control, full-speed control, then bulk) queue. |
| 559 | * - The third queue is the terminating bandwidth reclamation queue, |
| 560 | * which contains no members, loops back to itself, and is present |
| 561 | * only when FSBR is on and there are no full-speed control or bulk QHs. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 562 | */ |
| 563 | static int uhci_start(struct usb_hcd *hcd) |
| 564 | { |
| 565 | struct uhci_hcd *uhci = hcd_to_uhci(hcd); |
| 566 | int retval = -EBUSY; |
Alan Stern | c074b41 | 2005-04-22 14:39:12 -0400 | [diff] [blame] | 567 | int i; |
Alan Stern | b409214 | 2010-08-05 13:12:14 -0400 | [diff] [blame] | 568 | struct dentry __maybe_unused *dentry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 569 | |
Alan Stern | 6c1b445 | 2005-04-21 16:04:58 -0400 | [diff] [blame] | 570 | hcd->uses_new_polling = 1; |
Sebastian Andrzej Siewior | 2851784 | 2012-01-13 19:04:17 +0100 | [diff] [blame] | 571 | /* Accept arbitrarily long scatter-gather lists */ |
| 572 | if (!(hcd->driver->flags & HCD_LOCAL_MEM)) |
| 573 | hcd->self.sg_tablesize = ~0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 575 | spin_lock_init(&uhci->lock); |
Alan Stern | c5e3b74 | 2006-06-05 12:28:57 -0400 | [diff] [blame] | 576 | setup_timer(&uhci->fsbr_timer, uhci_fsbr_timeout, |
| 577 | (unsigned long) uhci); |
Alan Stern | dccf4a4 | 2005-12-17 17:58:46 -0500 | [diff] [blame] | 578 | INIT_LIST_HEAD(&uhci->idle_qh_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 579 | init_waitqueue_head(&uhci->waitqh); |
| 580 | |
Alan Stern | b409214 | 2010-08-05 13:12:14 -0400 | [diff] [blame] | 581 | #ifdef UHCI_DEBUG_OPS |
| 582 | dentry = debugfs_create_file(hcd->self.bus_name, |
| 583 | S_IFREG|S_IRUGO|S_IWUSR, uhci_debugfs_root, |
| 584 | uhci, &uhci_debug_operations); |
| 585 | if (!dentry) { |
| 586 | dev_err(uhci_dev(uhci), "couldn't create uhci debugfs entry\n"); |
| 587 | return -ENOMEM; |
Alan Stern | 8d402e1 | 2005-12-17 18:03:37 -0500 | [diff] [blame] | 588 | } |
Alan Stern | b409214 | 2010-08-05 13:12:14 -0400 | [diff] [blame] | 589 | uhci->dentry = dentry; |
| 590 | #endif |
Alan Stern | 8d402e1 | 2005-12-17 18:03:37 -0500 | [diff] [blame] | 591 | |
Alan Stern | a1d59ce | 2005-09-16 14:22:51 -0400 | [diff] [blame] | 592 | uhci->frame = dma_alloc_coherent(uhci_dev(uhci), |
| 593 | UHCI_NUMFRAMES * sizeof(*uhci->frame), |
| 594 | &uhci->frame_dma_handle, 0); |
| 595 | if (!uhci->frame) { |
Chen Gang | 3171fca | 2013-01-24 09:41:45 +0800 | [diff] [blame] | 596 | dev_err(uhci_dev(uhci), |
| 597 | "unable to allocate consistent memory for frame list\n"); |
Alan Stern | a1d59ce | 2005-09-16 14:22:51 -0400 | [diff] [blame] | 598 | goto err_alloc_frame; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | } |
Alan Stern | a1d59ce | 2005-09-16 14:22:51 -0400 | [diff] [blame] | 600 | memset(uhci->frame, 0, UHCI_NUMFRAMES * sizeof(*uhci->frame)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 601 | |
Alan Stern | a1d59ce | 2005-09-16 14:22:51 -0400 | [diff] [blame] | 602 | uhci->frame_cpu = kcalloc(UHCI_NUMFRAMES, sizeof(*uhci->frame_cpu), |
| 603 | GFP_KERNEL); |
| 604 | if (!uhci->frame_cpu) { |
Chen Gang | 3171fca | 2013-01-24 09:41:45 +0800 | [diff] [blame] | 605 | dev_err(uhci_dev(uhci), |
| 606 | "unable to allocate memory for frame pointers\n"); |
Alan Stern | a1d59ce | 2005-09-16 14:22:51 -0400 | [diff] [blame] | 607 | goto err_alloc_frame_cpu; |
| 608 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 609 | |
| 610 | uhci->td_pool = dma_pool_create("uhci_td", uhci_dev(uhci), |
| 611 | sizeof(struct uhci_td), 16, 0); |
| 612 | if (!uhci->td_pool) { |
| 613 | dev_err(uhci_dev(uhci), "unable to create td dma_pool\n"); |
| 614 | goto err_create_td_pool; |
| 615 | } |
| 616 | |
| 617 | uhci->qh_pool = dma_pool_create("uhci_qh", uhci_dev(uhci), |
| 618 | sizeof(struct uhci_qh), 16, 0); |
| 619 | if (!uhci->qh_pool) { |
| 620 | dev_err(uhci_dev(uhci), "unable to create qh dma_pool\n"); |
| 621 | goto err_create_qh_pool; |
| 622 | } |
| 623 | |
Alan Stern | 2532178 | 2005-04-25 11:14:31 -0400 | [diff] [blame] | 624 | uhci->term_td = uhci_alloc_td(uhci); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 625 | if (!uhci->term_td) { |
| 626 | dev_err(uhci_dev(uhci), "unable to allocate terminating TD\n"); |
| 627 | goto err_alloc_term_td; |
| 628 | } |
| 629 | |
| 630 | for (i = 0; i < UHCI_NUM_SKELQH; i++) { |
Alan Stern | dccf4a4 | 2005-12-17 17:58:46 -0500 | [diff] [blame] | 631 | uhci->skelqh[i] = uhci_alloc_qh(uhci, NULL, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | if (!uhci->skelqh[i]) { |
| 633 | dev_err(uhci_dev(uhci), "unable to allocate QH\n"); |
| 634 | goto err_alloc_skelqh; |
| 635 | } |
| 636 | } |
| 637 | |
| 638 | /* |
Alan Stern | 17230ac | 2007-02-19 15:52:45 -0500 | [diff] [blame] | 639 | * 8 Interrupt queues; link all higher int queues to int1 = async |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 640 | */ |
Alan Stern | 17230ac | 2007-02-19 15:52:45 -0500 | [diff] [blame] | 641 | for (i = SKEL_ISO + 1; i < SKEL_ASYNC; ++i) |
Jan Andersson | 51e2f62 | 2011-05-18 10:44:51 +0200 | [diff] [blame] | 642 | uhci->skelqh[i]->link = LINK_TO_QH(uhci, uhci->skel_async_qh); |
| 643 | uhci->skel_async_qh->link = UHCI_PTR_TERM(uhci); |
| 644 | uhci->skel_term_qh->link = LINK_TO_QH(uhci, uhci->skel_term_qh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 645 | |
| 646 | /* This dummy TD is to work around a bug in Intel PIIX controllers */ |
Jan Andersson | 51e2f62 | 2011-05-18 10:44:51 +0200 | [diff] [blame] | 647 | uhci_fill_td(uhci, uhci->term_td, 0, uhci_explen(0) | |
Alan Stern | 17230ac | 2007-02-19 15:52:45 -0500 | [diff] [blame] | 648 | (0x7f << TD_TOKEN_DEVADDR_SHIFT) | USB_PID_IN, 0); |
Jan Andersson | 51e2f62 | 2011-05-18 10:44:51 +0200 | [diff] [blame] | 649 | uhci->term_td->link = UHCI_PTR_TERM(uhci); |
Alan Stern | 17230ac | 2007-02-19 15:52:45 -0500 | [diff] [blame] | 650 | uhci->skel_async_qh->element = uhci->skel_term_qh->element = |
Jan Andersson | 51e2f62 | 2011-05-18 10:44:51 +0200 | [diff] [blame] | 651 | LINK_TO_TD(uhci, uhci->term_td); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 652 | |
| 653 | /* |
| 654 | * Fill the frame list: make all entries point to the proper |
| 655 | * interrupt queue. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 656 | */ |
| 657 | for (i = 0; i < UHCI_NUMFRAMES; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 658 | |
| 659 | /* Only place we don't use the frame list routines */ |
Alan Stern | f3fe239 | 2007-01-08 12:00:28 -0500 | [diff] [blame] | 660 | uhci->frame[i] = uhci_frame_skel_link(uhci, i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 661 | } |
| 662 | |
| 663 | /* |
| 664 | * Some architectures require a full mb() to enforce completion of |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 665 | * the memory writes above before the I/O transfers in configure_hc(). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 666 | */ |
| 667 | mb(); |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 668 | |
Alan Stern | 0f815a0 | 2013-01-22 11:37:35 -0500 | [diff] [blame] | 669 | spin_lock_irq(&uhci->lock); |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 670 | configure_hc(uhci); |
Alan Stern | 8d402e1 | 2005-12-17 18:03:37 -0500 | [diff] [blame] | 671 | uhci->is_initialized = 1; |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 672 | start_rh(uhci); |
Alan Stern | ba297ed | 2010-06-09 17:34:39 -0400 | [diff] [blame] | 673 | spin_unlock_irq(&uhci->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 674 | return 0; |
| 675 | |
| 676 | /* |
| 677 | * error exits: |
| 678 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 679 | err_alloc_skelqh: |
Alan Stern | 8b4cd42 | 2005-09-16 14:17:45 -0400 | [diff] [blame] | 680 | for (i = 0; i < UHCI_NUM_SKELQH; i++) { |
| 681 | if (uhci->skelqh[i]) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 682 | uhci_free_qh(uhci, uhci->skelqh[i]); |
Alan Stern | 8b4cd42 | 2005-09-16 14:17:45 -0400 | [diff] [blame] | 683 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 684 | |
| 685 | uhci_free_td(uhci, uhci->term_td); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 686 | |
| 687 | err_alloc_term_td: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 688 | dma_pool_destroy(uhci->qh_pool); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 689 | |
| 690 | err_create_qh_pool: |
| 691 | dma_pool_destroy(uhci->td_pool); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 692 | |
| 693 | err_create_td_pool: |
Alan Stern | a1d59ce | 2005-09-16 14:22:51 -0400 | [diff] [blame] | 694 | kfree(uhci->frame_cpu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 695 | |
Alan Stern | a1d59ce | 2005-09-16 14:22:51 -0400 | [diff] [blame] | 696 | err_alloc_frame_cpu: |
| 697 | dma_free_coherent(uhci_dev(uhci), |
| 698 | UHCI_NUMFRAMES * sizeof(*uhci->frame), |
| 699 | uhci->frame, uhci->frame_dma_handle); |
| 700 | |
| 701 | err_alloc_frame: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 702 | debugfs_remove(uhci->dentry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 703 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 704 | return retval; |
| 705 | } |
| 706 | |
| 707 | static void uhci_stop(struct usb_hcd *hcd) |
| 708 | { |
| 709 | struct uhci_hcd *uhci = hcd_to_uhci(hcd); |
| 710 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 711 | spin_lock_irq(&uhci->lock); |
Alan Stern | 541c7d4 | 2010-06-22 16:39:10 -0400 | [diff] [blame] | 712 | if (HCD_HW_ACCESSIBLE(hcd) && !uhci->dead) |
Alan Stern | e323de4 | 2006-06-05 12:21:30 -0400 | [diff] [blame] | 713 | uhci_hc_died(uhci); |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 714 | uhci_scan_schedule(uhci); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 715 | spin_unlock_irq(&uhci->lock); |
Pete Zaitcev | d23356da | 2010-01-08 15:39:22 -0700 | [diff] [blame] | 716 | synchronize_irq(hcd->irq); |
Alan Stern | 6c1b445 | 2005-04-21 16:04:58 -0400 | [diff] [blame] | 717 | |
Alan Stern | c5e3b74 | 2006-06-05 12:28:57 -0400 | [diff] [blame] | 718 | del_timer_sync(&uhci->fsbr_timer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 719 | release_uhci(uhci); |
| 720 | } |
| 721 | |
| 722 | #ifdef CONFIG_PM |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 723 | static int uhci_rh_suspend(struct usb_hcd *hcd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 724 | { |
| 725 | struct uhci_hcd *uhci = hcd_to_uhci(hcd); |
David Brownell | be3cbc5 | 2006-06-05 12:16:39 -0400 | [diff] [blame] | 726 | int rc = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 727 | |
| 728 | spin_lock_irq(&uhci->lock); |
Alan Stern | 541c7d4 | 2010-06-22 16:39:10 -0400 | [diff] [blame] | 729 | if (!HCD_HW_ACCESSIBLE(hcd)) |
David Brownell | be3cbc5 | 2006-06-05 12:16:39 -0400 | [diff] [blame] | 730 | rc = -ESHUTDOWN; |
Alan Stern | cec3a53 | 2010-01-08 11:18:20 -0500 | [diff] [blame] | 731 | else if (uhci->dead) |
| 732 | ; /* Dead controllers tell no tales */ |
| 733 | |
| 734 | /* Once the controller is stopped, port resumes that are already |
| 735 | * in progress won't complete. Hence if remote wakeup is enabled |
| 736 | * for the root hub and any ports are in the middle of a resume or |
| 737 | * remote wakeup, we must fail the suspend. |
| 738 | */ |
| 739 | else if (hcd->self.root_hub->do_remote_wakeup && |
| 740 | uhci->resuming_ports) { |
Chen Gang | 3171fca | 2013-01-24 09:41:45 +0800 | [diff] [blame] | 741 | dev_dbg(uhci_dev(uhci), |
| 742 | "suspend failed because a port is resuming\n"); |
Alan Stern | cec3a53 | 2010-01-08 11:18:20 -0500 | [diff] [blame] | 743 | rc = -EBUSY; |
| 744 | } else |
Alan Stern | 4daaa87 | 2005-04-09 17:30:08 -0400 | [diff] [blame] | 745 | suspend_rh(uhci, UHCI_RH_SUSPENDED); |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 746 | spin_unlock_irq(&uhci->lock); |
David Brownell | be3cbc5 | 2006-06-05 12:16:39 -0400 | [diff] [blame] | 747 | return rc; |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 748 | } |
| 749 | |
| 750 | static int uhci_rh_resume(struct usb_hcd *hcd) |
| 751 | { |
| 752 | struct uhci_hcd *uhci = hcd_to_uhci(hcd); |
Alan Stern | 4daaa87 | 2005-04-09 17:30:08 -0400 | [diff] [blame] | 753 | int rc = 0; |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 754 | |
| 755 | spin_lock_irq(&uhci->lock); |
Alan Stern | 541c7d4 | 2010-06-22 16:39:10 -0400 | [diff] [blame] | 756 | if (!HCD_HW_ACCESSIBLE(hcd)) |
David Brownell | be3cbc5 | 2006-06-05 12:16:39 -0400 | [diff] [blame] | 757 | rc = -ESHUTDOWN; |
Alan Stern | cfa59da | 2007-06-21 16:25:35 -0400 | [diff] [blame] | 758 | else if (!uhci->dead) |
Alan Stern | 4daaa87 | 2005-04-09 17:30:08 -0400 | [diff] [blame] | 759 | wakeup_rh(uhci); |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 760 | spin_unlock_irq(&uhci->lock); |
Alan Stern | 4daaa87 | 2005-04-09 17:30:08 -0400 | [diff] [blame] | 761 | return rc; |
Alan Stern | a8bed8b | 2005-04-09 17:29:00 -0400 | [diff] [blame] | 762 | } |
| 763 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 764 | #endif |
| 765 | |
Alan Stern | dccf4a4 | 2005-12-17 17:58:46 -0500 | [diff] [blame] | 766 | /* 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] | 767 | static void uhci_hcd_endpoint_disable(struct usb_hcd *hcd, |
Alan Stern | dccf4a4 | 2005-12-17 17:58:46 -0500 | [diff] [blame] | 768 | struct usb_host_endpoint *hep) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 769 | { |
| 770 | struct uhci_hcd *uhci = hcd_to_uhci(hcd); |
Alan Stern | dccf4a4 | 2005-12-17 17:58:46 -0500 | [diff] [blame] | 771 | struct uhci_qh *qh; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 772 | |
Alan Stern | dccf4a4 | 2005-12-17 17:58:46 -0500 | [diff] [blame] | 773 | spin_lock_irq(&uhci->lock); |
| 774 | qh = (struct uhci_qh *) hep->hcpriv; |
| 775 | if (qh == NULL) |
| 776 | goto done; |
| 777 | |
| 778 | while (qh->state != QH_STATE_IDLE) { |
| 779 | ++uhci->num_waiting; |
| 780 | spin_unlock_irq(&uhci->lock); |
| 781 | wait_event_interruptible(uhci->waitqh, |
| 782 | qh->state == QH_STATE_IDLE); |
| 783 | spin_lock_irq(&uhci->lock); |
| 784 | --uhci->num_waiting; |
| 785 | } |
| 786 | |
| 787 | uhci_free_qh(uhci, qh); |
| 788 | done: |
| 789 | spin_unlock_irq(&uhci->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 790 | } |
| 791 | |
| 792 | static int uhci_hcd_get_frame_number(struct usb_hcd *hcd) |
| 793 | { |
| 794 | struct uhci_hcd *uhci = hcd_to_uhci(hcd); |
Alan Stern | c433472 | 2006-05-19 16:34:57 -0400 | [diff] [blame] | 795 | unsigned frame_number; |
| 796 | unsigned delta; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 797 | |
| 798 | /* Minimize latency by avoiding the spinlock */ |
Alan Stern | c433472 | 2006-05-19 16:34:57 -0400 | [diff] [blame] | 799 | frame_number = uhci->frame_number; |
| 800 | barrier(); |
Jan Andersson | 9faa091 | 2011-05-06 12:00:16 +0200 | [diff] [blame] | 801 | delta = (uhci_readw(uhci, USBFRNUM) - frame_number) & |
Alan Stern | c433472 | 2006-05-19 16:34:57 -0400 | [diff] [blame] | 802 | (UHCI_NUMFRAMES - 1); |
| 803 | return frame_number + delta; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 804 | } |
| 805 | |
Jan Andersson | c31a65f | 2011-05-06 12:00:15 +0200 | [diff] [blame] | 806 | /* Determines number of ports on controller */ |
| 807 | static int uhci_count_ports(struct usb_hcd *hcd) |
| 808 | { |
| 809 | struct uhci_hcd *uhci = hcd_to_uhci(hcd); |
| 810 | unsigned io_size = (unsigned) hcd->rsrc_len; |
| 811 | int port; |
| 812 | |
| 813 | /* The UHCI spec says devices must have 2 ports, and goes on to say |
| 814 | * they may have more but gives no way to determine how many there |
| 815 | * are. However according to the UHCI spec, Bit 7 of the port |
| 816 | * status and control register is always set to 1. So we try to |
| 817 | * use this to our advantage. Another common failure mode when |
| 818 | * a nonexistent register is addressed is to return all ones, so |
| 819 | * we test for that also. |
| 820 | */ |
| 821 | for (port = 0; port < (io_size - USBPORTSC1) / 2; port++) { |
| 822 | unsigned int portstatus; |
| 823 | |
Jan Andersson | 9faa091 | 2011-05-06 12:00:16 +0200 | [diff] [blame] | 824 | portstatus = uhci_readw(uhci, USBPORTSC1 + (port * 2)); |
Jan Andersson | c31a65f | 2011-05-06 12:00:15 +0200 | [diff] [blame] | 825 | if (!(portstatus & 0x0080) || portstatus == 0xffff) |
| 826 | break; |
| 827 | } |
| 828 | if (debug) |
| 829 | dev_info(uhci_dev(uhci), "detected %d ports\n", port); |
| 830 | |
| 831 | /* Anything greater than 7 is weird so we'll ignore it. */ |
| 832 | if (port > UHCI_RH_MAXCHILD) { |
Chen Gang | 3171fca | 2013-01-24 09:41:45 +0800 | [diff] [blame] | 833 | dev_info(uhci_dev(uhci), |
| 834 | "port count misdetected? forcing to 2 ports\n"); |
Jan Andersson | c31a65f | 2011-05-06 12:00:15 +0200 | [diff] [blame] | 835 | port = 2; |
| 836 | } |
| 837 | |
| 838 | return port; |
| 839 | } |
| 840 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 841 | static const char hcd_name[] = "uhci_hcd"; |
| 842 | |
Jan Andersson | 3db7739 | 2011-05-06 12:00:18 +0200 | [diff] [blame] | 843 | #ifdef CONFIG_PCI |
Jan Andersson | c31a65f | 2011-05-06 12:00:15 +0200 | [diff] [blame] | 844 | #include "uhci-pci.c" |
Jan Andersson | 3db7739 | 2011-05-06 12:00:18 +0200 | [diff] [blame] | 845 | #define PCI_DRIVER uhci_pci_driver |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 846 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 847 | |
Jan Andersson | 3db7739 | 2011-05-06 12:00:18 +0200 | [diff] [blame] | 848 | #ifdef CONFIG_SPARC_LEON |
| 849 | #include "uhci-grlib.c" |
| 850 | #define PLATFORM_DRIVER uhci_grlib_driver |
Alan Stern | abb3064 | 2009-04-27 13:33:24 -0400 | [diff] [blame] | 851 | #endif |
Jan Andersson | 3db7739 | 2011-05-06 12:00:18 +0200 | [diff] [blame] | 852 | |
Tony Prisk | 100d459 | 2012-07-21 22:58:53 +1200 | [diff] [blame] | 853 | #ifdef CONFIG_USB_UHCI_PLATFORM |
| 854 | #include "uhci-platform.c" |
| 855 | #define PLATFORM_DRIVER uhci_platform_driver |
| 856 | #endif |
| 857 | |
Jan Andersson | 3db7739 | 2011-05-06 12:00:18 +0200 | [diff] [blame] | 858 | #if !defined(PCI_DRIVER) && !defined(PLATFORM_DRIVER) |
| 859 | #error "missing bus glue for uhci-hcd" |
| 860 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 861 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 862 | static int __init uhci_hcd_init(void) |
| 863 | { |
| 864 | int retval = -ENOMEM; |
| 865 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 866 | if (usb_disabled()) |
| 867 | return -ENODEV; |
| 868 | |
Alan Stern | 2b70f07 | 2008-10-02 11:47:15 -0400 | [diff] [blame] | 869 | printk(KERN_INFO "uhci_hcd: " DRIVER_DESC "%s\n", |
| 870 | ignore_oc ? ", overcurrent ignored" : ""); |
Alan Stern | 9beeee6 | 2008-10-02 11:48:13 -0400 | [diff] [blame] | 871 | set_bit(USB_UHCI_LOADED, &usb_hcds_loaded); |
Alan Stern | 2b70f07 | 2008-10-02 11:47:15 -0400 | [diff] [blame] | 872 | |
Oliver Neukum | 1c20163 | 2013-11-18 13:23:16 +0100 | [diff] [blame] | 873 | #ifdef CONFIG_DYNAMIC_DEBUG |
Oliver Neukum | cadb375 | 2013-11-18 13:23:09 +0100 | [diff] [blame] | 874 | errbuf = kmalloc(ERRBUF_LEN, GFP_KERNEL); |
| 875 | if (!errbuf) |
| 876 | goto errbuf_failed; |
| 877 | uhci_debugfs_root = debugfs_create_dir("uhci", usb_debug_root); |
| 878 | if (!uhci_debugfs_root) |
| 879 | goto debug_failed; |
| 880 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 881 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 882 | uhci_up_cachep = kmem_cache_create("uhci_urb_priv", |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 883 | sizeof(struct urb_priv), 0, 0, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 884 | if (!uhci_up_cachep) |
| 885 | goto up_failed; |
| 886 | |
Jan Andersson | 3db7739 | 2011-05-06 12:00:18 +0200 | [diff] [blame] | 887 | #ifdef PLATFORM_DRIVER |
| 888 | retval = platform_driver_register(&PLATFORM_DRIVER); |
| 889 | if (retval < 0) |
| 890 | goto clean0; |
| 891 | #endif |
| 892 | |
| 893 | #ifdef PCI_DRIVER |
| 894 | retval = pci_register_driver(&PCI_DRIVER); |
| 895 | if (retval < 0) |
| 896 | goto clean1; |
| 897 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 898 | |
| 899 | return 0; |
| 900 | |
Jan Andersson | 3db7739 | 2011-05-06 12:00:18 +0200 | [diff] [blame] | 901 | #ifdef PCI_DRIVER |
| 902 | clean1: |
| 903 | #endif |
| 904 | #ifdef PLATFORM_DRIVER |
| 905 | platform_driver_unregister(&PLATFORM_DRIVER); |
| 906 | clean0: |
| 907 | #endif |
Alexey Dobriyan | 1a1d92c | 2006-09-27 01:49:40 -0700 | [diff] [blame] | 908 | kmem_cache_destroy(uhci_up_cachep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 909 | |
| 910 | up_failed: |
Oliver Neukum | cadb375 | 2013-11-18 13:23:09 +0100 | [diff] [blame] | 911 | #if defined(DEBUG) || defined(CONFIG_DYNAMIC_DEBUG) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 912 | debugfs_remove(uhci_debugfs_root); |
| 913 | |
| 914 | debug_failed: |
| 915 | kfree(errbuf); |
| 916 | |
| 917 | errbuf_failed: |
Oliver Neukum | cadb375 | 2013-11-18 13:23:09 +0100 | [diff] [blame] | 918 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 919 | |
Alan Stern | 9beeee6 | 2008-10-02 11:48:13 -0400 | [diff] [blame] | 920 | clear_bit(USB_UHCI_LOADED, &usb_hcds_loaded); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 921 | return retval; |
| 922 | } |
| 923 | |
| 924 | static void __exit uhci_hcd_cleanup(void) |
| 925 | { |
Jan Andersson | 3db7739 | 2011-05-06 12:00:18 +0200 | [diff] [blame] | 926 | #ifdef PLATFORM_DRIVER |
| 927 | platform_driver_unregister(&PLATFORM_DRIVER); |
| 928 | #endif |
| 929 | #ifdef PCI_DRIVER |
| 930 | pci_unregister_driver(&PCI_DRIVER); |
| 931 | #endif |
Alexey Dobriyan | 1a1d92c | 2006-09-27 01:49:40 -0700 | [diff] [blame] | 932 | kmem_cache_destroy(uhci_up_cachep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 933 | debugfs_remove(uhci_debugfs_root); |
Oliver Neukum | 1c20163 | 2013-11-18 13:23:16 +0100 | [diff] [blame] | 934 | #ifdef CONFIG_DYNAMIC_DEBUG |
Jesper Juhl | 1bc3c9e | 2005-04-18 17:39:34 -0700 | [diff] [blame] | 935 | kfree(errbuf); |
Oliver Neukum | cadb375 | 2013-11-18 13:23:09 +0100 | [diff] [blame] | 936 | #endif |
Alan Stern | 9beeee6 | 2008-10-02 11:48:13 -0400 | [diff] [blame] | 937 | clear_bit(USB_UHCI_LOADED, &usb_hcds_loaded); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 938 | } |
| 939 | |
| 940 | module_init(uhci_hcd_init); |
| 941 | module_exit(uhci_hcd_cleanup); |
| 942 | |
| 943 | MODULE_AUTHOR(DRIVER_AUTHOR); |
| 944 | MODULE_DESCRIPTION(DRIVER_DESC); |
| 945 | MODULE_LICENSE("GPL"); |