drivers/usb/host/ohci-pci.c

   1 /*
   2  * OHCI HCD (Host Controller Driver) for USB.
   3  *
   4  * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
   5  * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
   6  *
   7  * [ Initialisation is based on Linus'  ]
   8  * [ uhci code and gregs ohci fragments ]
   9  * [ (C) Copyright 1999 Linus Torvalds  ]
  10  * [ (C) Copyright 1999 Gregory P. Smith]
  11  *
  12  * PCI Bus Glue
  13  *
  14  * This file is licenced under the GPL.
  15  */
  16
  17 #include <linux/io.h>
  18 #include <linux/kernel.h>
  19 #include <linux/module.h>
  20 #include <linux/pci.h>
  21 #include <linux/usb.h>
  22 #include <linux/usb/hcd.h>
  23
  24 #include "ohci.h"
  25 #include "pci-quirks.h"
  26
  27 #define DRIVER_DESC "OHCI PCI platform driver"
  28
  29 static const char hcd_name[] = "ohci-pci";
  30
  31
  32 /*-------------------------------------------------------------------------*/
  33
  34 static int broken_suspend(struct usb_hcd *hcd)
  35 {
  36         device_init_wakeup(&hcd->self.root_hub->dev, 0);
  37         return 0;
  38 }
  39
  40 /* AMD 756, for most chips (early revs), corrupts register
  41  * values on read ... so enable the vendor workaround.
  42  */
  43 static int ohci_quirk_amd756(struct usb_hcd *hcd)
  44 {
  45         struct ohci_hcd *ohci = hcd_to_ohci (hcd);
  46
  47         ohci->flags = OHCI_QUIRK_AMD756;
  48         ohci_dbg (ohci, "AMD756 erratum 4 workaround\n");
  49
  50         /* also erratum 10 (suspend/resume issues) */
  51         return broken_suspend(hcd);
  52 }
  53
  54 /* Apple's OHCI driver has a lot of bizarre workarounds
  55  * for this chip.  Evidently control and bulk lists
  56  * can get confused.  (B&W G3 models, and ...)
  57  */
  58 static int ohci_quirk_opti(struct usb_hcd *hcd)
  59 {
  60         struct ohci_hcd *ohci = hcd_to_ohci (hcd);
  61
  62         ohci_dbg (ohci, "WARNING: OPTi workarounds unavailable\n");
  63
  64         return 0;
  65 }
  66
  67 /* Check for NSC87560. We have to look at the bridge (fn1) to
  68  * identify the USB (fn2). This quirk might apply to more or
  69  * even all NSC stuff.
  70  */
  71 static int ohci_quirk_ns(struct usb_hcd *hcd)
  72 {
  73         struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
  74         struct pci_dev  *b;
  75
  76         b  = pci_get_slot (pdev->bus, PCI_DEVFN (PCI_SLOT (pdev->devfn), 1));
  77         if (b && b->device == PCI_DEVICE_ID_NS_87560_LIO
  78             && b->vendor == PCI_VENDOR_ID_NS) {
  79                 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
  80
  81                 ohci->flags |= OHCI_QUIRK_SUPERIO;
  82                 ohci_dbg (ohci, "Using NSC SuperIO setup\n");
  83         }
  84         pci_dev_put(b);
  85
  86         return 0;
  87 }
  88
  89 /* Check for Compaq's ZFMicro chipset, which needs short
  90  * delays before control or bulk queues get re-activated
  91  * in finish_unlinks()
  92  */
  93 static int ohci_quirk_zfmicro(struct usb_hcd *hcd)
  94 {
  95         struct ohci_hcd *ohci = hcd_to_ohci (hcd);
  96
  97         ohci->flags |= OHCI_QUIRK_ZFMICRO;
  98         ohci_dbg(ohci, "enabled Compaq ZFMicro chipset quirks\n");
  99
 100         return 0;
 101 }
 102
 103 /* Check for Toshiba SCC OHCI which has big endian registers
 104  * and little endian in memory data structures
 105  */
 106 static int ohci_quirk_toshiba_scc(struct usb_hcd *hcd)
 107 {
 108         struct ohci_hcd *ohci = hcd_to_ohci (hcd);
 109
 110         /* That chip is only present in the southbridge of some
 111          * cell based platforms which are supposed to select
 112          * CONFIG_USB_OHCI_BIG_ENDIAN_MMIO. We verify here if
 113          * that was the case though.
 114          */
 115 #ifdef CONFIG_USB_OHCI_BIG_ENDIAN_MMIO
 116         ohci->flags |= OHCI_QUIRK_BE_MMIO;
 117         ohci_dbg (ohci, "enabled big endian Toshiba quirk\n");
 118         return 0;
 119 #else
 120         ohci_err (ohci, "unsupported big endian Toshiba quirk\n");
 121         return -ENXIO;
 122 #endif
 123 }
 124
 125 /* Check for NEC chip and apply quirk for allegedly lost interrupts.
 126  */
 127
 128 static void ohci_quirk_nec_worker(struct work_struct *work)
 129 {
 130         struct ohci_hcd *ohci = container_of(work, struct ohci_hcd, nec_work);
 131         int status;
 132
 133         status = ohci_restart(ohci);
 134         if (status != 0)
 135                 ohci_err(ohci, "Restarting NEC controller failed in %s, %d\n",
 136                          "ohci_restart", status);
 137 }
 138
 139 static int ohci_quirk_nec(struct usb_hcd *hcd)
 140 {
 141         struct ohci_hcd *ohci = hcd_to_ohci (hcd);
 142
 143         ohci->flags |= OHCI_QUIRK_NEC;
 144         INIT_WORK(&ohci->nec_work, ohci_quirk_nec_worker);
 145         ohci_dbg (ohci, "enabled NEC chipset lost interrupt quirk\n");
 146
 147         return 0;
 148 }
 149
 150 static int ohci_quirk_amd700(struct usb_hcd *hcd)
 151 {
 152         struct ohci_hcd *ohci = hcd_to_ohci(hcd);
 153
 154         if (usb_amd_find_chipset_info())
 155                 ohci->flags |= OHCI_QUIRK_AMD_PLL;
 156
 157         /* SB800 needs pre-fetch fix */
 158         if (usb_amd_prefetch_quirk()) {
 159                 ohci->flags |= OHCI_QUIRK_AMD_PREFETCH;
 160                 ohci_dbg(ohci, "enabled AMD prefetch quirk\n");
 161         }
 162
 163         ohci->flags |= OHCI_QUIRK_GLOBAL_SUSPEND;
 164         return 0;
 165 }
 166
 167 /* List of quirks for OHCI */
 168 static const struct pci_device_id ohci_pci_quirks[] = {
 169         {
 170                 PCI_DEVICE(PCI_VENDOR_ID_AMD, 0x740c),
 171                 .driver_data = (unsigned long)ohci_quirk_amd756,
 172         },
 173         {
 174                 PCI_DEVICE(PCI_VENDOR_ID_OPTI, 0xc861),
 175                 .driver_data = (unsigned long)ohci_quirk_opti,
 176         },
 177         {
 178                 PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_ANY_ID),
 179                 .driver_data = (unsigned long)ohci_quirk_ns,
 180         },
 181         {
 182                 PCI_DEVICE(PCI_VENDOR_ID_COMPAQ, 0xa0f8),
 183                 .driver_data = (unsigned long)ohci_quirk_zfmicro,
 184         },
 185         {
 186                 PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, 0x01b6),
 187                 .driver_data = (unsigned long)ohci_quirk_toshiba_scc,
 188         },
 189         {
 190                 PCI_DEVICE(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_USB),
 191                 .driver_data = (unsigned long)ohci_quirk_nec,
 192         },
 193         {
 194                 /* Toshiba portege 4000 */
 195                 .vendor         = PCI_VENDOR_ID_AL,
 196                 .device         = 0x5237,
 197                 .subvendor      = PCI_VENDOR_ID_TOSHIBA,
 198                 .subdevice      = 0x0004,
 199                 .driver_data    = (unsigned long) broken_suspend,
 200         },
 201         {
 202                 PCI_DEVICE(PCI_VENDOR_ID_ITE, 0x8152),
 203                 .driver_data = (unsigned long) broken_suspend,
 204         },
 205         {
 206                 PCI_DEVICE(PCI_VENDOR_ID_ATI, 0x4397),
 207                 .driver_data = (unsigned long)ohci_quirk_amd700,
 208         },
 209         {
 210                 PCI_DEVICE(PCI_VENDOR_ID_ATI, 0x4398),
 211                 .driver_data = (unsigned long)ohci_quirk_amd700,
 212         },
 213         {
 214                 PCI_DEVICE(PCI_VENDOR_ID_ATI, 0x4399),
 215                 .driver_data = (unsigned long)ohci_quirk_amd700,
 216         },
 217
 218         /* FIXME for some of the early AMD 760 southbridges, OHCI
 219          * won't work at all.  blacklist them.
 220          */
 221
 222         {},
 223 };
 224
 225 static int ohci_pci_reset (struct usb_hcd *hcd)
 226 {
 227         struct ohci_hcd *ohci = hcd_to_ohci (hcd);
 228         struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
 229         int ret = 0;
 230
 231         if (hcd->self.controller) {
 232                 const struct pci_device_id *quirk_id;
 233
 234                 quirk_id = pci_match_id(ohci_pci_quirks, pdev);
 235                 if (quirk_id != NULL) {
 236                         int (*quirk)(struct usb_hcd *ohci);
 237                         quirk = (void *)quirk_id->driver_data;
 238                         ret = quirk(hcd);
 239                 }
 240         }
 241
 242         if (ret == 0)
 243                 ret = ohci_setup(hcd);
 244         /*
 245         * After ohci setup RWC may not be set for add-in PCI cards.
 246         * This transfers PCI PM wakeup capabilities.
 247         */
 248         if (device_can_wakeup(&pdev->dev))
 249                 ohci->hc_control |= OHCI_CTRL_RWC;
 250         return ret;
 251 }
 252
 253 static struct hc_driver __read_mostly ohci_pci_hc_driver;
 254
 255 static const struct ohci_driver_overrides pci_overrides __initconst = {
 256         .product_desc =         "OHCI PCI host controller",
 257         .reset =                ohci_pci_reset,
 258 };
 259
 260 static const struct pci_device_id pci_ids [] = { {
 261         /* handle any USB OHCI controller */
 262         PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_OHCI, ~0),
 263         .driver_data =  (unsigned long) &ohci_pci_hc_driver,
 264         }, {
 265         /* The device in the ConneXT I/O hub has no class reg */
 266         PCI_VDEVICE(STMICRO, PCI_DEVICE_ID_STMICRO_USB_OHCI),
 267         .driver_data =  (unsigned long) &ohci_pci_hc_driver,
 268         }, { /* end: all zeroes */ }
 269 };
 270 MODULE_DEVICE_TABLE (pci, pci_ids);
 271
 272 /* pci driver glue; this is a "new style" PCI driver module */
 273 static struct pci_driver ohci_pci_driver = {
 274         .name =         (char *) hcd_name,
 275         .id_table =     pci_ids,
 276
 277         .probe =        usb_hcd_pci_probe,
 278         .remove =       usb_hcd_pci_remove,
 279         .shutdown =     usb_hcd_pci_shutdown,
 280
 281 #ifdef CONFIG_PM
 282         .driver =       {
 283                 .pm =   &usb_hcd_pci_pm_ops
 284         },
 285 #endif
 286 };
 287
 288 static int __init ohci_pci_init(void)
 289 {
 290         if (usb_disabled())
 291                 return -ENODEV;
 292
 293         pr_info("%s: " DRIVER_DESC "\n", hcd_name);
 294
 295         ohci_init_driver(&ohci_pci_hc_driver, &pci_overrides);
 296
 297 #ifdef  CONFIG_PM
 298         /* Entries for the PCI suspend/resume callbacks are special */
 299         ohci_pci_hc_driver.pci_suspend = ohci_suspend;
 300         ohci_pci_hc_driver.pci_resume = ohci_resume;
 301 #endif
 302
 303         return pci_register_driver(&ohci_pci_driver);
 304 }
 305 module_init(ohci_pci_init);
 306
 307 static void __exit ohci_pci_cleanup(void)
 308 {
 309         pci_unregister_driver(&ohci_pci_driver);
 310 }
 311 module_exit(ohci_pci_cleanup);
 312
 313 MODULE_DESCRIPTION(DRIVER_DESC);
 314 MODULE_LICENSE("GPL");
 315 MODULE_SOFTDEP("pre: ehci_pci");