drivers/usb/host/ohci-pxa27x.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  * Bus Glue for pxa27x
   9  *
  10  * Written by Christopher Hoover <ch@hpl.hp.com>
  11  * Based on fragments of previous driver by Russell King et al.
  12  *
  13  * Modified for LH7A404 from ohci-sa1111.c
  14  *  by Durgesh Pattamatta <pattamattad@sharpsec.com>
  15  *
  16  * Modified for pxa27x from ohci-lh7a404.c
  17  *  by Nick Bane <nick@cecomputing.co.uk> 26-8-2004
  18  *
  19  * This file is licenced under the GPL.
  20  */
  21
  22 #include <linux/device.h>
  23 #include <asm/mach-types.h>
  24 #include <asm/hardware.h>
  25 #include <asm/arch/pxa-regs.h>
  26
  27
  28 #define PMM_NPS_MODE           1
  29 #define PMM_GLOBAL_MODE        2
  30 #define PMM_PERPORT_MODE       3
  31
  32 #define PXA_UHC_MAX_PORTNUM    3
  33
  34 #define UHCRHPS(x)              __REG2( 0x4C000050, (x)<<2 )
  35
  36 static int pxa27x_ohci_pmm_state;
  37
  38 /*
  39   PMM_NPS_MODE -- PMM Non-power switching mode
  40       Ports are powered continuously.
  41
  42   PMM_GLOBAL_MODE -- PMM global switching mode
  43       All ports are powered at the same time.
  44
  45   PMM_PERPORT_MODE -- PMM per port switching mode
  46       Ports are powered individually.
  47  */
  48 static int pxa27x_ohci_select_pmm( int mode )
  49 {
  50         pxa27x_ohci_pmm_state = mode;
  51
  52         switch ( mode ) {
  53         case PMM_NPS_MODE:
  54                 UHCRHDA |= RH_A_NPS;
  55                 break;
  56         case PMM_GLOBAL_MODE:
  57                 UHCRHDA &= ~(RH_A_NPS & RH_A_PSM);
  58                 break;
  59         case PMM_PERPORT_MODE:
  60                 UHCRHDA &= ~(RH_A_NPS);
  61                 UHCRHDA |= RH_A_PSM;
  62
  63                 /* Set port power control mask bits, only 3 ports. */
  64                 UHCRHDB |= (0x7<<17);
  65                 break;
  66         default:
  67                 printk( KERN_ERR
  68                         "Invalid mode %d, set to non-power switch mode.\n",
  69                         mode );
  70
  71                 pxa27x_ohci_pmm_state = PMM_NPS_MODE;
  72                 UHCRHDA |= RH_A_NPS;
  73         }
  74
  75         return 0;
  76 }
  77
  78 extern int usb_disabled(void);
  79
  80 /*-------------------------------------------------------------------------*/
  81
  82 static void pxa27x_start_hc(struct platform_device *dev)
  83 {
  84         pxa_set_cken(CKEN10_USBHOST, 1);
  85
  86         UHCHR |= UHCHR_FHR;
  87         udelay(11);
  88         UHCHR &= ~UHCHR_FHR;
  89
  90         UHCHR |= UHCHR_FSBIR;
  91         while (UHCHR & UHCHR_FSBIR)
  92                 cpu_relax();
  93
  94         /* This could be properly abstracted away through the
  95            device data the day more machines are supported and
  96            their differences can be figured out correctly. */
  97         if (machine_is_mainstone()) {
  98                 /* setup Port1 GPIO pin. */
  99                 pxa_gpio_mode( 88 | GPIO_ALT_FN_1_IN);  /* USBHPWR1 */
 100                 pxa_gpio_mode( 89 | GPIO_ALT_FN_2_OUT); /* USBHPEN1 */
 101
 102                 /* Set the Power Control Polarity Low and Power Sense
 103                    Polarity Low to active low. Supply power to USB ports. */
 104                 UHCHR = (UHCHR | UHCHR_PCPL | UHCHR_PSPL) &
 105                         ~(UHCHR_SSEP1 | UHCHR_SSEP2 | UHCHR_SSEP3 | UHCHR_SSE);
 106
 107                 pxa27x_ohci_pmm_state = PMM_PERPORT_MODE;
 108         }
 109
 110         UHCHR &= ~UHCHR_SSE;
 111
 112         UHCHIE = (UHCHIE_UPRIE | UHCHIE_RWIE);
 113
 114         /* Clear any OTG Pin Hold */
 115         if (PSSR & PSSR_OTGPH)
 116                 PSSR |= PSSR_OTGPH;
 117 }
 118
 119 static void pxa27x_stop_hc(struct platform_device *dev)
 120 {
 121         UHCHR |= UHCHR_FHR;
 122         udelay(11);
 123         UHCHR &= ~UHCHR_FHR;
 124
 125         UHCCOMS |= 1;
 126         udelay(10);
 127
 128         pxa_set_cken(CKEN10_USBHOST, 0);
 129 }
 130
 131
 132 /*-------------------------------------------------------------------------*/
 133
 134 /* configure so an HC device and id are always provided */
 135 /* always called with process context; sleeping is OK */
 136
 137
 138 /**
 139  * usb_hcd_pxa27x_probe - initialize pxa27x-based HCDs
 140  * Context: !in_interrupt()
 141  *
 142  * Allocates basic resources for this USB host controller, and
 143  * then invokes the start() method for the HCD associated with it
 144  * through the hotplug entry's driver_data.
 145  *
 146  */
 147 int usb_hcd_pxa27x_probe (const struct hc_driver *driver,
 148                           struct platform_device *dev)
 149 {
 150         int retval;
 151         struct usb_hcd *hcd;
 152
 153         if (dev->resource[1].flags != IORESOURCE_IRQ) {
 154                 pr_debug ("resource[1] is not IORESOURCE_IRQ");
 155                 return -ENOMEM;
 156         }
 157
 158         hcd = usb_create_hcd (driver, &dev->dev, "pxa27x");
 159         if (!hcd)
 160                 return -ENOMEM;
 161         hcd->rsrc_start = dev->resource[0].start;
 162         hcd->rsrc_len = dev->resource[0].end - dev->resource[0].start + 1;
 163
 164         if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
 165                 pr_debug("request_mem_region failed");
 166                 retval = -EBUSY;
 167                 goto err1;
 168         }
 169
 170         hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
 171         if (!hcd->regs) {
 172                 pr_debug("ioremap failed");
 173                 retval = -ENOMEM;
 174                 goto err2;
 175         }
 176
 177         pxa27x_start_hc(dev);
 178
 179         /* Select Power Management Mode */
 180         pxa27x_ohci_select_pmm(pxa27x_ohci_pmm_state);
 181
 182         ohci_hcd_init(hcd_to_ohci(hcd));
 183
 184         retval = usb_add_hcd(hcd, dev->resource[1].start, SA_INTERRUPT);
 185         if (retval == 0)
 186                 return retval;
 187
 188         pxa27x_stop_hc(dev);
 189         iounmap(hcd->regs);
 190  err2:
 191         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 192  err1:
 193         usb_put_hcd(hcd);
 194         return retval;
 195 }
 196
 197
 198 /* may be called without controller electrically present */
 199 /* may be called with controller, bus, and devices active */
 200
 201 /**
 202  * usb_hcd_pxa27x_remove - shutdown processing for pxa27x-based HCDs
 203  * @dev: USB Host Controller being removed
 204  * Context: !in_interrupt()
 205  *
 206  * Reverses the effect of usb_hcd_pxa27x_probe(), first invoking
 207  * the HCD's stop() method.  It is always called from a thread
 208  * context, normally "rmmod", "apmd", or something similar.
 209  *
 210  */
 211 void usb_hcd_pxa27x_remove (struct usb_hcd *hcd, struct platform_device *dev)
 212 {
 213         usb_remove_hcd(hcd);
 214         pxa27x_stop_hc(dev);
 215         iounmap(hcd->regs);
 216         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 217         usb_put_hcd(hcd);
 218 }
 219
 220 /*-------------------------------------------------------------------------*/
 221
 222 static int __devinit
 223 ohci_pxa27x_start (struct usb_hcd *hcd)
 224 {
 225         struct ohci_hcd *ohci = hcd_to_ohci (hcd);
 226         int             ret;
 227
 228         ohci_dbg (ohci, "ohci_pxa27x_start, ohci:%p", ohci);
 229
 230         /* The value of NDP in roothub_a is incorrect on this hardware */
 231         ohci->num_ports = 3;
 232
 233         if ((ret = ohci_init(ohci)) < 0)
 234                 return ret;
 235
 236         if ((ret = ohci_run (ohci)) < 0) {
 237                 err ("can't start %s", hcd->self.bus_name);
 238                 ohci_stop (hcd);
 239                 return ret;
 240         }
 241
 242         return 0;
 243 }
 244
 245 /*-------------------------------------------------------------------------*/
 246
 247 static const struct hc_driver ohci_pxa27x_hc_driver = {
 248         .description =          hcd_name,
 249         .product_desc =         "PXA27x OHCI",
 250         .hcd_priv_size =        sizeof(struct ohci_hcd),
 251
 252         /*
 253          * generic hardware linkage
 254          */
 255         .irq =                  ohci_irq,
 256         .flags =                HCD_USB11 | HCD_MEMORY,
 257
 258         /*
 259          * basic lifecycle operations
 260          */
 261         .start =                ohci_pxa27x_start,
 262         .stop =                 ohci_stop,
 263
 264         /*
 265          * managing i/o requests and associated device resources
 266          */
 267         .urb_enqueue =          ohci_urb_enqueue,
 268         .urb_dequeue =          ohci_urb_dequeue,
 269         .endpoint_disable =     ohci_endpoint_disable,
 270
 271         /*
 272          * scheduling support
 273          */
 274         .get_frame_number =     ohci_get_frame,
 275
 276         /*
 277          * root hub support
 278          */
 279         .hub_status_data =      ohci_hub_status_data,
 280         .hub_control =          ohci_hub_control,
 281 #ifdef  CONFIG_USB_SUSPEND
 282         .hub_suspend =          ohci_hub_suspend,
 283         .hub_resume =           ohci_hub_resume,
 284 #endif
 285 };
 286
 287 /*-------------------------------------------------------------------------*/
 288
 289 static int ohci_hcd_pxa27x_drv_probe(struct device *dev)
 290 {
 291         struct platform_device *pdev = to_platform_device(dev);
 292         int ret;
 293
 294         pr_debug ("In ohci_hcd_pxa27x_drv_probe");
 295
 296         if (usb_disabled())
 297                 return -ENODEV;
 298
 299         ret = usb_hcd_pxa27x_probe(&ohci_pxa27x_hc_driver, pdev);
 300         return ret;
 301 }
 302
 303 static int ohci_hcd_pxa27x_drv_remove(struct device *dev)
 304 {
 305         struct platform_device *pdev = to_platform_device(dev);
 306         struct usb_hcd *hcd = dev_get_drvdata(dev);
 307
 308         usb_hcd_pxa27x_remove(hcd, pdev);
 309         return 0;
 310 }
 311
 312 static int ohci_hcd_pxa27x_drv_suspend(struct device *dev, pm_message_t state, u32 level)
 313 {
 314 //      struct platform_device *pdev = to_platform_device(dev);
 315 //      struct usb_hcd *hcd = dev_get_drvdata(dev);
 316         printk("%s: not implemented yet\n", __FUNCTION__);
 317
 318         return 0;
 319 }
 320
 321 static int ohci_hcd_pxa27x_drv_resume(struct device *dev, u32 level)
 322 {
 323 //      struct platform_device *pdev = to_platform_device(dev);
 324 //      struct usb_hcd *hcd = dev_get_drvdata(dev);
 325         printk("%s: not implemented yet\n", __FUNCTION__);
 326
 327         return 0;
 328 }
 329
 330
 331 static struct device_driver ohci_hcd_pxa27x_driver = {
 332         .name           = "pxa27x-ohci",
 333         .bus            = &platform_bus_type,
 334         .probe          = ohci_hcd_pxa27x_drv_probe,
 335         .remove         = ohci_hcd_pxa27x_drv_remove,
 336         .suspend        = ohci_hcd_pxa27x_drv_suspend,
 337         .resume         = ohci_hcd_pxa27x_drv_resume,
 338 };
 339
 340 static int __init ohci_hcd_pxa27x_init (void)
 341 {
 342         pr_debug (DRIVER_INFO " (pxa27x)");
 343         pr_debug ("block sizes: ed %d td %d\n",
 344                 sizeof (struct ed), sizeof (struct td));
 345
 346         return driver_register(&ohci_hcd_pxa27x_driver);
 347 }
 348
 349 static void __exit ohci_hcd_pxa27x_cleanup (void)
 350 {
 351         driver_unregister(&ohci_hcd_pxa27x_driver);
 352 }
 353
 354 module_init (ohci_hcd_pxa27x_init);
 355 module_exit (ohci_hcd_pxa27x_cleanup);