drivers/usb/host/ohci-sa1111.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  * (C) Copyright 2002 Hewlett-Packard Company
   7  *
   8  * SA1111 Bus Glue
   9  *
  10  * Written by Christopher Hoover <ch@hpl.hp.com>
  11  * Based on fragments of previous driver by Russell King et al.
  12  *
  13  * This file is licenced under the GPL.
  14  */
  15
  16 #include <mach/hardware.h>
  17 #include <asm/mach-types.h>
  18 #include <mach/assabet.h>
  19 #include <mach/badge4.h>
  20 #include <asm/hardware/sa1111.h>
  21
  22 #ifndef CONFIG_SA1111
  23 #error "This file is SA-1111 bus glue.  CONFIG_SA1111 must be defined."
  24 #endif
  25
  26 extern int usb_disabled(void);
  27
  28 /*-------------------------------------------------------------------------*/
  29
  30 static void sa1111_start_hc(struct sa1111_dev *dev)
  31 {
  32         unsigned int usb_rst = 0;
  33
  34         printk(KERN_DEBUG "%s: starting SA-1111 OHCI USB Controller\n",
  35                __FILE__);
  36
  37 #ifdef CONFIG_SA1100_BADGE4
  38         if (machine_is_badge4()) {
  39                 badge4_set_5V(BADGE4_5V_USB, 1);
  40         }
  41 #endif
  42
  43         if (machine_is_xp860() ||
  44             machine_has_neponset() ||
  45             machine_is_pfs168() ||
  46             machine_is_badge4())
  47                 usb_rst = USB_RESET_PWRSENSELOW | USB_RESET_PWRCTRLLOW;
  48
  49         /*
  50          * Configure the power sense and control lines.  Place the USB
  51          * host controller in reset.
  52          */
  53         sa1111_writel(usb_rst | USB_RESET_FORCEIFRESET | USB_RESET_FORCEHCRESET,
  54                       dev->mapbase + SA1111_USB_RESET);
  55
  56         /*
  57          * Now, carefully enable the USB clock, and take
  58          * the USB host controller out of reset.
  59          */
  60         sa1111_enable_device(dev);
  61         udelay(11);
  62         sa1111_writel(usb_rst, dev->mapbase + SA1111_USB_RESET);
  63 }
  64
  65 static void sa1111_stop_hc(struct sa1111_dev *dev)
  66 {
  67         unsigned int usb_rst;
  68         printk(KERN_DEBUG "%s: stopping SA-1111 OHCI USB Controller\n",
  69                __FILE__);
  70
  71         /*
  72          * Put the USB host controller into reset.
  73          */
  74         usb_rst = sa1111_readl(dev->mapbase + SA1111_USB_RESET);
  75         sa1111_writel(usb_rst | USB_RESET_FORCEIFRESET | USB_RESET_FORCEHCRESET,
  76                       dev->mapbase + SA1111_USB_RESET);
  77
  78         /*
  79          * Stop the USB clock.
  80          */
  81         sa1111_disable_device(dev);
  82
  83 #ifdef CONFIG_SA1100_BADGE4
  84         if (machine_is_badge4()) {
  85                 /* Disable power to the USB bus */
  86                 badge4_set_5V(BADGE4_5V_USB, 0);
  87         }
  88 #endif
  89 }
  90
  91
  92 /*-------------------------------------------------------------------------*/
  93
  94 #if 0
  95 static void dump_hci_status(struct usb_hcd *hcd, const char *label)
  96 {
  97         unsigned long status = sa1111_readl(hcd->regs + SA1111_USB_STATUS);
  98
  99         dbg ("%s USB_STATUS = { %s%s%s%s%s}", label,
 100              ((status & USB_STATUS_IRQHCIRMTWKUP) ? "IRQHCIRMTWKUP " : ""),
 101              ((status & USB_STATUS_IRQHCIBUFFACC) ? "IRQHCIBUFFACC " : ""),
 102              ((status & USB_STATUS_NIRQHCIM) ? "" : "IRQHCIM "),
 103              ((status & USB_STATUS_NHCIMFCLR) ? "" : "HCIMFCLR "),
 104              ((status & USB_STATUS_USBPWRSENSE) ? "USBPWRSENSE " : ""));
 105 }
 106 #endif
 107
 108 /*-------------------------------------------------------------------------*/
 109
 110 /* configure so an HC device and id are always provided */
 111 /* always called with process context; sleeping is OK */
 112
 113
 114 /**
 115  * usb_hcd_sa1111_probe - initialize SA-1111-based HCDs
 116  * Context: !in_interrupt()
 117  *
 118  * Allocates basic resources for this USB host controller, and
 119  * then invokes the start() method for the HCD associated with it
 120  * through the hotplug entry's driver_data.
 121  *
 122  * Store this function in the HCD's struct pci_driver as probe().
 123  */
 124 int usb_hcd_sa1111_probe (const struct hc_driver *driver,
 125                           struct sa1111_dev *dev)
 126 {
 127         struct usb_hcd *hcd;
 128         int retval;
 129
 130         hcd = usb_create_hcd (driver, &dev->dev, "sa1111");
 131         if (!hcd)
 132                 return -ENOMEM;
 133         hcd->rsrc_start = dev->res.start;
 134         hcd->rsrc_len = resource_size(&dev->res);
 135
 136         if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
 137                 dbg("request_mem_region failed");
 138                 retval = -EBUSY;
 139                 goto err1;
 140         }
 141         hcd->regs = dev->mapbase;
 142
 143         sa1111_start_hc(dev);
 144         ohci_hcd_init(hcd_to_ohci(hcd));
 145
 146         retval = usb_add_hcd(hcd, dev->irq[1], IRQF_DISABLED);
 147         if (retval == 0)
 148                 return retval;
 149
 150         sa1111_stop_hc(dev);
 151         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 152  err1:
 153         usb_put_hcd(hcd);
 154         return retval;
 155 }
 156
 157
 158 /* may be called without controller electrically present */
 159 /* may be called with controller, bus, and devices active */
 160
 161 /**
 162  * usb_hcd_sa1111_remove - shutdown processing for SA-1111-based HCDs
 163  * @dev: USB Host Controller being removed
 164  * Context: !in_interrupt()
 165  *
 166  * Reverses the effect of usb_hcd_sa1111_probe(), first invoking
 167  * the HCD's stop() method.  It is always called from a thread
 168  * context, normally "rmmod", "apmd", or something similar.
 169  *
 170  */
 171 void usb_hcd_sa1111_remove (struct usb_hcd *hcd, struct sa1111_dev *dev)
 172 {
 173         usb_remove_hcd(hcd);
 174         sa1111_stop_hc(dev);
 175         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 176         usb_put_hcd(hcd);
 177 }
 178
 179 /*-------------------------------------------------------------------------*/
 180
 181 static int __devinit
 182 ohci_sa1111_start (struct usb_hcd *hcd)
 183 {
 184         struct ohci_hcd *ohci = hcd_to_ohci (hcd);
 185         int             ret;
 186
 187         if ((ret = ohci_init(ohci)) < 0)
 188                 return ret;
 189
 190         if ((ret = ohci_run (ohci)) < 0) {
 191                 err ("can't start %s", hcd->self.bus_name);
 192                 ohci_stop (hcd);
 193                 return ret;
 194         }
 195         return 0;
 196 }
 197
 198 /*-------------------------------------------------------------------------*/
 199
 200 static const struct hc_driver ohci_sa1111_hc_driver = {
 201         .description =          hcd_name,
 202         .product_desc =         "SA-1111 OHCI",
 203         .hcd_priv_size =        sizeof(struct ohci_hcd),
 204
 205         /*
 206          * generic hardware linkage
 207          */
 208         .irq =                  ohci_irq,
 209         .flags =                HCD_USB11 | HCD_MEMORY,
 210
 211         /*
 212          * basic lifecycle operations
 213          */
 214         .start =                ohci_sa1111_start,
 215         .stop =                 ohci_stop,
 216
 217         /*
 218          * managing i/o requests and associated device resources
 219          */
 220         .urb_enqueue =          ohci_urb_enqueue,
 221         .urb_dequeue =          ohci_urb_dequeue,
 222         .endpoint_disable =     ohci_endpoint_disable,
 223
 224         /*
 225          * scheduling support
 226          */
 227         .get_frame_number =     ohci_get_frame,
 228
 229         /*
 230          * root hub support
 231          */
 232         .hub_status_data =      ohci_hub_status_data,
 233         .hub_control =          ohci_hub_control,
 234 #ifdef  CONFIG_PM
 235         .bus_suspend =          ohci_bus_suspend,
 236         .bus_resume =           ohci_bus_resume,
 237 #endif
 238         .start_port_reset =     ohci_start_port_reset,
 239 };
 240
 241 /*-------------------------------------------------------------------------*/
 242
 243 static int ohci_hcd_sa1111_drv_probe(struct sa1111_dev *dev)
 244 {
 245         int ret;
 246
 247         if (usb_disabled())
 248                 return -ENODEV;
 249
 250         ret = usb_hcd_sa1111_probe(&ohci_sa1111_hc_driver, dev);
 251         return ret;
 252 }
 253
 254 static int ohci_hcd_sa1111_drv_remove(struct sa1111_dev *dev)
 255 {
 256         struct usb_hcd *hcd = sa1111_get_drvdata(dev);
 257
 258         usb_hcd_sa1111_remove(hcd, dev);
 259         return 0;
 260 }
 261
 262 static struct sa1111_driver ohci_hcd_sa1111_driver = {
 263         .drv = {
 264                 .name   = "sa1111-ohci",
 265         },
 266         .devid          = SA1111_DEVID_USB,
 267         .probe          = ohci_hcd_sa1111_drv_probe,
 268         .remove         = ohci_hcd_sa1111_drv_remove,
 269 };
 270