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/jiffies.h>
  18
  19 #ifdef CONFIG_PPC_PMAC
  20 #include <asm/machdep.h>
  21 #include <asm/pmac_feature.h>
  22 #include <asm/pci-bridge.h>
  23 #include <asm/prom.h>
  24 #endif
  25
  26 #ifndef CONFIG_PCI
  27 #error "This file is PCI bus glue.  CONFIG_PCI must be defined."
  28 #endif
  29
  30 /*-------------------------------------------------------------------------*/
  31
  32 static int
  33 ohci_pci_reset (struct usb_hcd *hcd)
  34 {
  35         struct ohci_hcd *ohci = hcd_to_ohci (hcd);
  36
  37         ohci_hcd_init (ohci);
  38         return ohci_init (ohci);
  39 }
  40
  41 static int __devinit
  42 ohci_pci_start (struct usb_hcd *hcd)
  43 {
  44         struct ohci_hcd *ohci = hcd_to_ohci (hcd);
  45         int             ret;
  46
  47         if(hcd->self.controller && hcd->self.controller->bus == &pci_bus_type) {
  48                 struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
  49
  50                 /* AMD 756, for most chips (early revs), corrupts register
  51                  * values on read ... so enable the vendor workaround.
  52                  */
  53                 if (pdev->vendor == PCI_VENDOR_ID_AMD
  54                                 && pdev->device == 0x740c) {
  55                         ohci->flags = OHCI_QUIRK_AMD756;
  56                         ohci_dbg (ohci, "AMD756 erratum 4 workaround\n");
  57                         // also somewhat erratum 10 (suspend/resume issues)
  58                 }
  59
  60                 /* FIXME for some of the early AMD 760 southbridges, OHCI
  61                  * won't work at all.  blacklist them.
  62                  */
  63
  64                 /* Apple's OHCI driver has a lot of bizarre workarounds
  65                  * for this chip.  Evidently control and bulk lists
  66                  * can get confused.  (B&W G3 models, and ...)
  67                  */
  68                 else if (pdev->vendor == PCI_VENDOR_ID_OPTI
  69                                 && pdev->device == 0xc861) {
  70                         ohci_dbg (ohci,
  71                                 "WARNING: OPTi workarounds unavailable\n");
  72                 }
  73
  74                 /* Check for NSC87560. We have to look at the bridge (fn1) to
  75                  * identify the USB (fn2). This quirk might apply to more or
  76                  * even all NSC stuff.
  77                  */
  78                 else if (pdev->vendor == PCI_VENDOR_ID_NS) {
  79                         struct pci_dev  *b;
  80
  81                         b  = pci_find_slot (pdev->bus->number,
  82                                         PCI_DEVFN (PCI_SLOT (pdev->devfn), 1));
  83                         if (b && b->device == PCI_DEVICE_ID_NS_87560_LIO
  84                                         && b->vendor == PCI_VENDOR_ID_NS) {
  85                                 ohci->flags |= OHCI_QUIRK_SUPERIO;
  86                                 ohci_dbg (ohci, "Using NSC SuperIO setup\n");
  87                         }
  88                 }
  89
  90                 /* Check for Compaq's ZFMicro chipset, which needs short
  91                  * delays before control or bulk queues get re-activated
  92                  * in finish_unlinks()
  93                  */
  94                 else if (pdev->vendor == PCI_VENDOR_ID_COMPAQ
  95                                 && pdev->device  == 0xa0f8) {
  96                         ohci->flags |= OHCI_QUIRK_ZFMICRO;
  97                         ohci_dbg (ohci,
  98                                 "enabled Compaq ZFMicro chipset quirk\n");
  99                 }
 100         }
 101
 102         /* NOTE: there may have already been a first reset, to
 103          * keep bios/smm irqs from making trouble
 104          */
 105         if ((ret = ohci_run (ohci)) < 0) {
 106                 ohci_err (ohci, "can't start\n");
 107                 ohci_stop (hcd);
 108                 return ret;
 109         }
 110         return 0;
 111 }
 112
 113 #ifdef  CONFIG_PM
 114
 115 static int ohci_pci_suspend (struct usb_hcd *hcd, pm_message_t message)
 116 {
 117         /* root hub was already suspended */
 118
 119         /* FIXME these PMAC things get called in the wrong places.  ASIC
 120          * clocks should be turned off AFTER entering D3, and on BEFORE
 121          * trying to enter D0.  Evidently the PCI layer doesn't currently
 122          * provide the right sort of platform hooks for this ...
 123          */
 124 #ifdef CONFIG_PPC_PMAC
 125         if (_machine == _MACH_Pmac) {
 126                 struct device_node      *of_node;
 127
 128                 /* Disable USB PAD & cell clock */
 129                 of_node = pci_device_to_OF_node (to_pci_dev(hcd->self.controller));
 130                 if (of_node)
 131                         pmac_call_feature(PMAC_FTR_USB_ENABLE, of_node, 0, 0);
 132         }
 133 #endif /* CONFIG_PPC_PMAC */
 134         return 0;
 135 }
 136
 137
 138 static int ohci_pci_resume (struct usb_hcd *hcd)
 139 {
 140 #ifdef CONFIG_PPC_PMAC
 141         if (_machine == _MACH_Pmac) {
 142                 struct device_node *of_node;
 143
 144                 /* Re-enable USB PAD & cell clock */
 145                 of_node = pci_device_to_OF_node (to_pci_dev(hcd->self.controller));
 146                 if (of_node)
 147                         pmac_call_feature (PMAC_FTR_USB_ENABLE, of_node, 0, 1);
 148         }
 149 #endif /* CONFIG_PPC_PMAC */
 150
 151         usb_hcd_resume_root_hub(hcd);
 152         return 0;
 153 }
 154
 155 #endif  /* CONFIG_PM */
 156
 157
 158 /*-------------------------------------------------------------------------*/
 159
 160 static const struct hc_driver ohci_pci_hc_driver = {
 161         .description =          hcd_name,
 162         .product_desc =         "OHCI Host Controller",
 163         .hcd_priv_size =        sizeof(struct ohci_hcd),
 164
 165         /*
 166          * generic hardware linkage
 167          */
 168         .irq =                  ohci_irq,
 169         .flags =                HCD_MEMORY | HCD_USB11,
 170
 171         /*
 172          * basic lifecycle operations
 173          */
 174         .reset =                ohci_pci_reset,
 175         .start =                ohci_pci_start,
 176 #ifdef  CONFIG_PM
 177         .suspend =              ohci_pci_suspend,
 178         .resume =               ohci_pci_resume,
 179 #endif
 180         .stop =                 ohci_stop,
 181
 182         /*
 183          * managing i/o requests and associated device resources
 184          */
 185         .urb_enqueue =          ohci_urb_enqueue,
 186         .urb_dequeue =          ohci_urb_dequeue,
 187         .endpoint_disable =     ohci_endpoint_disable,
 188
 189         /*
 190          * scheduling support
 191          */
 192         .get_frame_number =     ohci_get_frame,
 193
 194         /*
 195          * root hub support
 196          */
 197         .hub_status_data =      ohci_hub_status_data,
 198         .hub_control =          ohci_hub_control,
 199 #ifdef  CONFIG_PM
 200         .bus_suspend =          ohci_bus_suspend,
 201         .bus_resume =           ohci_bus_resume,
 202 #endif
 203         .start_port_reset =     ohci_start_port_reset,
 204 };
 205
 206 /*-------------------------------------------------------------------------*/
 207
 208
 209 static const struct pci_device_id pci_ids [] = { {
 210         /* handle any USB OHCI controller */
 211         PCI_DEVICE_CLASS((PCI_CLASS_SERIAL_USB << 8) | 0x10, ~0),
 212         .driver_data =  (unsigned long) &ohci_pci_hc_driver,
 213         }, { /* end: all zeroes */ }
 214 };
 215 MODULE_DEVICE_TABLE (pci, pci_ids);
 216
 217 /* pci driver glue; this is a "new style" PCI driver module */
 218 static struct pci_driver ohci_pci_driver = {
 219         .name =         (char *) hcd_name,
 220         .id_table =     pci_ids,
 221         .owner =        THIS_MODULE,
 222
 223         .probe =        usb_hcd_pci_probe,
 224         .remove =       usb_hcd_pci_remove,
 225
 226 #ifdef  CONFIG_PM
 227         .suspend =      usb_hcd_pci_suspend,
 228         .resume =       usb_hcd_pci_resume,
 229 #endif
 230 };
 231
 232
 233 static int __init ohci_hcd_pci_init (void)
 234 {
 235         printk (KERN_DEBUG "%s: " DRIVER_INFO " (PCI)\n", hcd_name);
 236         if (usb_disabled())
 237                 return -ENODEV;
 238
 239         pr_debug ("%s: block sizes: ed %Zd td %Zd\n", hcd_name,
 240                 sizeof (struct ed), sizeof (struct td));
 241         return pci_register_driver (&ohci_pci_driver);
 242 }
 243 module_init (ohci_hcd_pci_init);
 244
 245 /*-------------------------------------------------------------------------*/
 246
 247 static void __exit ohci_hcd_pci_cleanup (void)
 248 {
 249         pci_unregister_driver (&ohci_pci_driver);
 250 }
 251 module_exit (ohci_hcd_pci_cleanup);