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 <linux/signal.h>
  24 #include <linux/platform_device.h>
  25
  26 #include <asm/mach-types.h>
  27 #include <asm/hardware.h>
  28 #include <asm/arch/pxa-regs.h>
  29 #include <asm/arch/ohci.h>
  30
  31 #define PXA_UHC_MAX_PORTNUM    3
  32
  33 #define UHCRHPS(x)              __REG2( 0x4C000050, (x)<<2 )
  34
  35 /*
  36   PMM_NPS_MODE -- PMM Non-power switching mode
  37       Ports are powered continuously.
  38
  39   PMM_GLOBAL_MODE -- PMM global switching mode
  40       All ports are powered at the same time.
  41
  42   PMM_PERPORT_MODE -- PMM per port switching mode
  43       Ports are powered individually.
  44  */
  45 static int pxa27x_ohci_select_pmm( int mode )
  46 {
  47         switch ( mode ) {
  48         case PMM_NPS_MODE:
  49                 UHCRHDA |= RH_A_NPS;
  50                 break;
  51         case PMM_GLOBAL_MODE:
  52                 UHCRHDA &= ~(RH_A_NPS & RH_A_PSM);
  53                 break;
  54         case PMM_PERPORT_MODE:
  55                 UHCRHDA &= ~(RH_A_NPS);
  56                 UHCRHDA |= RH_A_PSM;
  57
  58                 /* Set port power control mask bits, only 3 ports. */
  59                 UHCRHDB |= (0x7<<17);
  60                 break;
  61         default:
  62                 printk( KERN_ERR
  63                         "Invalid mode %d, set to non-power switch mode.\n",
  64                         mode );
  65
  66                 UHCRHDA |= RH_A_NPS;
  67         }
  68
  69         return 0;
  70 }
  71
  72 extern int usb_disabled(void);
  73
  74 /*-------------------------------------------------------------------------*/
  75
  76 static int pxa27x_start_hc(struct device *dev)
  77 {
  78         int retval = 0;
  79         struct pxaohci_platform_data *inf;
  80
  81         inf = dev->platform_data;
  82
  83         pxa_set_cken(CKEN10_USBHOST, 1);
  84
  85         UHCHR |= UHCHR_FHR;
  86         udelay(11);
  87         UHCHR &= ~UHCHR_FHR;
  88
  89         UHCHR |= UHCHR_FSBIR;
  90         while (UHCHR & UHCHR_FSBIR)
  91                 cpu_relax();
  92
  93         if (inf->init)
  94                 retval = inf->init(dev);
  95
  96         if (retval < 0)
  97                 return retval;
  98
  99         UHCHR &= ~UHCHR_SSE;
 100
 101         UHCHIE = (UHCHIE_UPRIE | UHCHIE_RWIE);
 102
 103         /* Clear any OTG Pin Hold */
 104         if (PSSR & PSSR_OTGPH)
 105                 PSSR |= PSSR_OTGPH;
 106
 107         return 0;
 108 }
 109
 110 static void pxa27x_stop_hc(struct device *dev)
 111 {
 112         struct pxaohci_platform_data *inf;
 113
 114         inf = dev->platform_data;
 115
 116         if (inf->exit)
 117                 inf->exit(dev);
 118
 119         UHCHR |= UHCHR_FHR;
 120         udelay(11);
 121         UHCHR &= ~UHCHR_FHR;
 122
 123         UHCCOMS |= 1;
 124         udelay(10);
 125
 126         pxa_set_cken(CKEN10_USBHOST, 0);
 127 }
 128
 129
 130 /*-------------------------------------------------------------------------*/
 131
 132 /* configure so an HC device and id are always provided */
 133 /* always called with process context; sleeping is OK */
 134
 135
 136 /**
 137  * usb_hcd_pxa27x_probe - initialize pxa27x-based HCDs
 138  * Context: !in_interrupt()
 139  *
 140  * Allocates basic resources for this USB host controller, and
 141  * then invokes the start() method for the HCD associated with it
 142  * through the hotplug entry's driver_data.
 143  *
 144  */
 145 int usb_hcd_pxa27x_probe (const struct hc_driver *driver, struct platform_device *pdev)
 146 {
 147         int retval;
 148         struct usb_hcd *hcd;
 149         struct pxaohci_platform_data *inf;
 150
 151         inf = pdev->dev.platform_data;
 152
 153         if (!inf)
 154                 return -ENODEV;
 155
 156         if (pdev->resource[1].flags != IORESOURCE_IRQ) {
 157                 pr_debug ("resource[1] is not IORESOURCE_IRQ");
 158                 return -ENOMEM;
 159         }
 160
 161         hcd = usb_create_hcd (driver, &pdev->dev, "pxa27x");
 162         if (!hcd)
 163                 return -ENOMEM;
 164         hcd->rsrc_start = pdev->resource[0].start;
 165         hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1;
 166
 167         if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
 168                 pr_debug("request_mem_region failed");
 169                 retval = -EBUSY;
 170                 goto err1;
 171         }
 172
 173         hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
 174         if (!hcd->regs) {
 175                 pr_debug("ioremap failed");
 176                 retval = -ENOMEM;
 177                 goto err2;
 178         }
 179
 180         if ((retval = pxa27x_start_hc(&pdev->dev)) < 0) {
 181                 pr_debug("pxa27x_start_hc failed");
 182                 goto err3;
 183         }
 184
 185         /* Select Power Management Mode */
 186         pxa27x_ohci_select_pmm(inf->port_mode);
 187
 188         ohci_hcd_init(hcd_to_ohci(hcd));
 189
 190         retval = usb_add_hcd(hcd, pdev->resource[1].start, SA_INTERRUPT);
 191         if (retval == 0)
 192                 return retval;
 193
 194         pxa27x_stop_hc(&pdev->dev);
 195  err3:
 196         iounmap(hcd->regs);
 197  err2:
 198         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 199  err1:
 200         usb_put_hcd(hcd);
 201         return retval;
 202 }
 203
 204
 205 /* may be called without controller electrically present */
 206 /* may be called with controller, bus, and devices active */
 207
 208 /**
 209  * usb_hcd_pxa27x_remove - shutdown processing for pxa27x-based HCDs
 210  * @dev: USB Host Controller being removed
 211  * Context: !in_interrupt()
 212  *
 213  * Reverses the effect of usb_hcd_pxa27x_probe(), first invoking
 214  * the HCD's stop() method.  It is always called from a thread
 215  * context, normally "rmmod", "apmd", or something similar.
 216  *
 217  */
 218 void usb_hcd_pxa27x_remove (struct usb_hcd *hcd, struct platform_device *pdev)
 219 {
 220         usb_remove_hcd(hcd);
 221         pxa27x_stop_hc(&pdev->dev);
 222         iounmap(hcd->regs);
 223         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 224         usb_put_hcd(hcd);
 225 }
 226
 227 /*-------------------------------------------------------------------------*/
 228
 229 static int __devinit
 230 ohci_pxa27x_start (struct usb_hcd *hcd)
 231 {
 232         struct ohci_hcd *ohci = hcd_to_ohci (hcd);
 233         int             ret;
 234
 235         ohci_dbg (ohci, "ohci_pxa27x_start, ohci:%p", ohci);
 236
 237         /* The value of NDP in roothub_a is incorrect on this hardware */
 238         ohci->num_ports = 3;
 239
 240         if ((ret = ohci_init(ohci)) < 0)
 241                 return ret;
 242
 243         if ((ret = ohci_run (ohci)) < 0) {
 244                 err ("can't start %s", hcd->self.bus_name);
 245                 ohci_stop (hcd);
 246                 return ret;
 247         }
 248
 249         return 0;
 250 }
 251
 252 /*-------------------------------------------------------------------------*/
 253
 254 static const struct hc_driver ohci_pxa27x_hc_driver = {
 255         .description =          hcd_name,
 256         .product_desc =         "PXA27x OHCI",
 257         .hcd_priv_size =        sizeof(struct ohci_hcd),
 258
 259         /*
 260          * generic hardware linkage
 261          */
 262         .irq =                  ohci_irq,
 263         .flags =                HCD_USB11 | HCD_MEMORY,
 264
 265         /*
 266          * basic lifecycle operations
 267          */
 268         .start =                ohci_pxa27x_start,
 269         .stop =                 ohci_stop,
 270
 271         /*
 272          * managing i/o requests and associated device resources
 273          */
 274         .urb_enqueue =          ohci_urb_enqueue,
 275         .urb_dequeue =          ohci_urb_dequeue,
 276         .endpoint_disable =     ohci_endpoint_disable,
 277
 278         /*
 279          * scheduling support
 280          */
 281         .get_frame_number =     ohci_get_frame,
 282
 283         /*
 284          * root hub support
 285          */
 286         .hub_status_data =      ohci_hub_status_data,
 287         .hub_control =          ohci_hub_control,
 288 #ifdef  CONFIG_PM
 289         .bus_suspend =          ohci_bus_suspend,
 290         .bus_resume =           ohci_bus_resume,
 291 #endif
 292         .start_port_reset =     ohci_start_port_reset,
 293 };
 294
 295 /*-------------------------------------------------------------------------*/
 296
 297 static int ohci_hcd_pxa27x_drv_probe(struct platform_device *pdev)
 298 {
 299         pr_debug ("In ohci_hcd_pxa27x_drv_probe");
 300
 301         if (usb_disabled())
 302                 return -ENODEV;
 303
 304         return usb_hcd_pxa27x_probe(&ohci_pxa27x_hc_driver, pdev);
 305 }
 306
 307 static int ohci_hcd_pxa27x_drv_remove(struct platform_device *pdev)
 308 {
 309         struct usb_hcd *hcd = platform_get_drvdata(pdev);
 310
 311         usb_hcd_pxa27x_remove(hcd, pdev);
 312         platform_set_drvdata(pdev, NULL);
 313         return 0;
 314 }
 315
 316 #ifdef  CONFIG_PM
 317 static int ohci_hcd_pxa27x_drv_suspend(struct platform_device *pdev, pm_message_t state)
 318 {
 319         struct usb_hcd *hcd = platform_get_drvdata(pdev);
 320         struct ohci_hcd *ohci = hcd_to_ohci(hcd);
 321
 322         if (time_before(jiffies, ohci->next_statechange))
 323                 msleep(5);
 324         ohci->next_statechange = jiffies;
 325
 326         pxa27x_stop_hc(&pdev->dev);
 327         hcd->state = HC_STATE_SUSPENDED;
 328         pdev->dev.power.power_state = PMSG_SUSPEND;
 329
 330         return 0;
 331 }
 332
 333 static int ohci_hcd_pxa27x_drv_resume(struct platform_device *pdev)
 334 {
 335         struct usb_hcd *hcd = platform_get_drvdata(pdev);
 336         struct ohci_hcd *ohci = hcd_to_ohci(hcd);
 337         int status;
 338
 339         if (time_before(jiffies, ohci->next_statechange))
 340                 msleep(5);
 341         ohci->next_statechange = jiffies;
 342
 343         if ((status = pxa27x_start_hc(&pdev->dev)) < 0)
 344                 return status;
 345
 346         pdev->dev.power.power_state = PMSG_ON;
 347         usb_hcd_resume_root_hub(hcd);
 348
 349         return 0;
 350 }
 351 #endif
 352
 353
 354 static struct platform_driver ohci_hcd_pxa27x_driver = {
 355         .probe          = ohci_hcd_pxa27x_drv_probe,
 356         .remove         = ohci_hcd_pxa27x_drv_remove,
 357 #ifdef CONFIG_PM
 358         .suspend        = ohci_hcd_pxa27x_drv_suspend,
 359         .resume         = ohci_hcd_pxa27x_drv_resume,
 360 #endif
 361         .driver         = {
 362                 .name   = "pxa27x-ohci",
 363         },
 364 };
 365
 366 static int __init ohci_hcd_pxa27x_init (void)
 367 {
 368         pr_debug (DRIVER_INFO " (pxa27x)");
 369         pr_debug ("block sizes: ed %d td %d\n",
 370                 sizeof (struct ed), sizeof (struct td));
 371
 372         return platform_driver_register(&ohci_hcd_pxa27x_driver);
 373 }
 374
 375 static void __exit ohci_hcd_pxa27x_cleanup (void)
 376 {
 377         platform_driver_unregister(&ohci_hcd_pxa27x_driver);
 378 }
 379
 380 module_init (ohci_hcd_pxa27x_init);
 381 module_exit (ohci_hcd_pxa27x_cleanup);