git.oblomov.eu Git - linux-2.6/blob - 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
  30
  31 #define PMM_NPS_MODE           1
  32 #define PMM_GLOBAL_MODE        2
  33 #define PMM_PERPORT_MODE       3
  34
  35 #define PXA_UHC_MAX_PORTNUM    3
  36
  37 #define UHCRHPS(x)              __REG2( 0x4C000050, (x)<<2 )
  38
  39 static int pxa27x_ohci_pmm_state;
  40
  41 /*
  42   PMM_NPS_MODE -- PMM Non-power switching mode
  43       Ports are powered continuously.
  44
  45   PMM_GLOBAL_MODE -- PMM global switching mode
  46       All ports are powered at the same time.
  47
  48   PMM_PERPORT_MODE -- PMM per port switching mode
  49       Ports are powered individually.
  50  */
  51 static int pxa27x_ohci_select_pmm( int mode )
  52 {
  53         pxa27x_ohci_pmm_state = mode;
  54
  55         switch ( mode ) {
  56         case PMM_NPS_MODE:
  57                 UHCRHDA |= RH_A_NPS;
  58                 break;
  59         case PMM_GLOBAL_MODE:
  60                 UHCRHDA &= ~(RH_A_NPS & RH_A_PSM);
  61                 break;
  62         case PMM_PERPORT_MODE:
  63                 UHCRHDA &= ~(RH_A_NPS);
  64                 UHCRHDA |= RH_A_PSM;
  65
  66                 /* Set port power control mask bits, only 3 ports. */
  67                 UHCRHDB |= (0x7<<17);
  68                 break;
  69         default:
  70                 printk( KERN_ERR
  71                         "Invalid mode %d, set to non-power switch mode.\n",
  72                         mode );
  73
  74                 pxa27x_ohci_pmm_state = PMM_NPS_MODE;
  75                 UHCRHDA |= RH_A_NPS;
  76         }
  77
  78         return 0;
  79 }
  80
  81 extern int usb_disabled(void);
  82
  83 /*-------------------------------------------------------------------------*/
  84
  85 static void pxa27x_start_hc(struct platform_device *dev)
  86 {
  87         pxa_set_cken(CKEN10_USBHOST, 1);
  88
  89         UHCHR |= UHCHR_FHR;
  90         udelay(11);
  91         UHCHR &= ~UHCHR_FHR;
  92
  93         UHCHR |= UHCHR_FSBIR;
  94         while (UHCHR & UHCHR_FSBIR)
  95                 cpu_relax();
  96
  97         /* This could be properly abstracted away through the
  98            device data the day more machines are supported and
  99            their differences can be figured out correctly. */
 100         if (machine_is_mainstone()) {
 101                 /* setup Port1 GPIO pin. */
 102                 pxa_gpio_mode( 88 | GPIO_ALT_FN_1_IN);  /* USBHPWR1 */
 103                 pxa_gpio_mode( 89 | GPIO_ALT_FN_2_OUT); /* USBHPEN1 */
 104
 105                 /* Set the Power Control Polarity Low and Power Sense
 106                    Polarity Low to active low. Supply power to USB ports. */
 107                 UHCHR = (UHCHR | UHCHR_PCPL | UHCHR_PSPL) &
 108                         ~(UHCHR_SSEP1 | UHCHR_SSEP2 | UHCHR_SSEP3 | UHCHR_SSE);
 109
 110                 pxa27x_ohci_pmm_state = PMM_PERPORT_MODE;
 111         }
 112
 113         UHCHR &= ~UHCHR_SSE;
 114
 115         UHCHIE = (UHCHIE_UPRIE | UHCHIE_RWIE);
 116
 117         /* Clear any OTG Pin Hold */
 118         if (PSSR & PSSR_OTGPH)
 119                 PSSR |= PSSR_OTGPH;
 120 }
 121
 122 static void pxa27x_stop_hc(struct platform_device *dev)
 123 {
 124         UHCHR |= UHCHR_FHR;
 125         udelay(11);
 126         UHCHR &= ~UHCHR_FHR;
 127
 128         UHCCOMS |= 1;
 129         udelay(10);
 130
 131         pxa_set_cken(CKEN10_USBHOST, 0);
 132 }
 133
 134
 135 /*-------------------------------------------------------------------------*/
 136
 137 /* configure so an HC device and id are always provided */
 138 /* always called with process context; sleeping is OK */
 139
 140
 141 /**
 142  * usb_hcd_pxa27x_probe - initialize pxa27x-based HCDs
 143  * Context: !in_interrupt()
 144  *
 145  * Allocates basic resources for this USB host controller, and
 146  * then invokes the start() method for the HCD associated with it
 147  * through the hotplug entry's driver_data.
 148  *
 149  */
 150 int usb_hcd_pxa27x_probe (const struct hc_driver *driver,
 151                           struct platform_device *dev)
 152 {
 153         int retval;
 154         struct usb_hcd *hcd;
 155
 156         if (dev->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, &dev->dev, "pxa27x");
 162         if (!hcd)
 163                 return -ENOMEM;
 164         hcd->rsrc_start = dev->resource[0].start;
 165         hcd->rsrc_len = dev->resource[0].end - dev->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         pxa27x_start_hc(dev);
 181
 182         /* Select Power Management Mode */
 183         pxa27x_ohci_select_pmm(pxa27x_ohci_pmm_state);
 184
 185         ohci_hcd_init(hcd_to_ohci(hcd));
 186
 187         retval = usb_add_hcd(hcd, dev->resource[1].start, SA_INTERRUPT);
 188         if (retval == 0)
 189                 return retval;
 190
 191         pxa27x_stop_hc(dev);
 192         iounmap(hcd->regs);
 193  err2:
 194         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 195  err1:
 196         usb_put_hcd(hcd);
 197         return retval;
 198 }
 199
 200
 201 /* may be called without controller electrically present */
 202 /* may be called with controller, bus, and devices active */
 203
 204 /**
 205  * usb_hcd_pxa27x_remove - shutdown processing for pxa27x-based HCDs
 206  * @dev: USB Host Controller being removed
 207  * Context: !in_interrupt()
 208  *
 209  * Reverses the effect of usb_hcd_pxa27x_probe(), first invoking
 210  * the HCD's stop() method.  It is always called from a thread
 211  * context, normally "rmmod", "apmd", or something similar.
 212  *
 213  */
 214 void usb_hcd_pxa27x_remove (struct usb_hcd *hcd, struct platform_device *dev)
 215 {
 216         usb_remove_hcd(hcd);
 217         pxa27x_stop_hc(dev);
 218         iounmap(hcd->regs);
 219         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 220         usb_put_hcd(hcd);
 221 }
 222
 223 /*-------------------------------------------------------------------------*/
 224
 225 static int __devinit
 226 ohci_pxa27x_start (struct usb_hcd *hcd)
 227 {
 228         struct ohci_hcd *ohci = hcd_to_ohci (hcd);
 229         int             ret;
 230
 231         ohci_dbg (ohci, "ohci_pxa27x_start, ohci:%p", ohci);
 232
 233         /* The value of NDP in roothub_a is incorrect on this hardware */
 234         ohci->num_ports = 3;
 235
 236         if ((ret = ohci_init(ohci)) < 0)
 237                 return ret;
 238
 239         if ((ret = ohci_run (ohci)) < 0) {
 240                 err ("can't start %s", hcd->self.bus_name);
 241                 ohci_stop (hcd);
 242                 return ret;
 243         }
 244
 245         return 0;
 246 }
 247
 248 /*-------------------------------------------------------------------------*/
 249
 250 static const struct hc_driver ohci_pxa27x_hc_driver = {
 251         .description =          hcd_name,
 252         .product_desc =         "PXA27x OHCI",
 253         .hcd_priv_size =        sizeof(struct ohci_hcd),
 254
 255         /*
 256          * generic hardware linkage
 257          */
 258         .irq =                  ohci_irq,
 259         .flags =                HCD_USB11 | HCD_MEMORY,
 260
 261         /*
 262          * basic lifecycle operations
 263          */
 264         .start =                ohci_pxa27x_start,
 265         .stop =                 ohci_stop,
 266
 267         /*
 268          * managing i/o requests and associated device resources
 269          */
 270         .urb_enqueue =          ohci_urb_enqueue,
 271         .urb_dequeue =          ohci_urb_dequeue,
 272         .endpoint_disable =     ohci_endpoint_disable,
 273
 274         /*
 275          * scheduling support
 276          */
 277         .get_frame_number =     ohci_get_frame,
 278
 279         /*
 280          * root hub support
 281          */
 282         .hub_status_data =      ohci_hub_status_data,
 283         .hub_control =          ohci_hub_control,
 284 #ifdef  CONFIG_PM
 285         .bus_suspend =          ohci_bus_suspend,
 286         .bus_resume =           ohci_bus_resume,
 287 #endif
 288         .start_port_reset =     ohci_start_port_reset,
 289 };
 290
 291 /*-------------------------------------------------------------------------*/
 292
 293 static int ohci_hcd_pxa27x_drv_probe(struct platform_device *pdev)
 294 {
 295         int ret;
 296
 297         pr_debug ("In ohci_hcd_pxa27x_drv_probe");
 298
 299         if (usb_disabled())
 300                 return -ENODEV;
 301
 302         ret = usb_hcd_pxa27x_probe(&ohci_pxa27x_hc_driver, pdev);
 303         return ret;
 304 }
 305
 306 static int ohci_hcd_pxa27x_drv_remove(struct platform_device *pdev)
 307 {
 308         struct usb_hcd *hcd = platform_get_drvdata(pdev);
 309
 310         usb_hcd_pxa27x_remove(hcd, pdev);
 311         return 0;
 312 }
 313
 314 static int ohci_hcd_pxa27x_drv_suspend(struct platform_device *dev, pm_message_t state)
 315 {
 316 //      struct usb_hcd *hcd = platform_get_drvdata(dev);
 317         printk("%s: not implemented yet\n", __FUNCTION__);
 318
 319         return 0;
 320 }
 321
 322 static int ohci_hcd_pxa27x_drv_resume(struct platform_device *dev)
 323 {
 324 //      struct usb_hcd *hcd = platform_get_drvdata(dev);
 325         printk("%s: not implemented yet\n", __FUNCTION__);
 326
 327         return 0;
 328 }
 329
 330
 331 static struct platform_driver ohci_hcd_pxa27x_driver = {
 332         .probe          = ohci_hcd_pxa27x_drv_probe,
 333         .remove         = ohci_hcd_pxa27x_drv_remove,
 334         .suspend        = ohci_hcd_pxa27x_drv_suspend,
 335         .resume         = ohci_hcd_pxa27x_drv_resume,
 336         .driver         = {
 337                 .name   = "pxa27x-ohci",
 338         },
 339 };
 340
 341 static int __init ohci_hcd_pxa27x_init (void)
 342 {
 343         pr_debug (DRIVER_INFO " (pxa27x)");
 344         pr_debug ("block sizes: ed %d td %d\n",
 345                 sizeof (struct ed), sizeof (struct td));
 346
 347         return platform_driver_register(&ohci_hcd_pxa27x_driver);
 348 }
 349
 350 static void __exit ohci_hcd_pxa27x_cleanup (void)
 351 {
 352         platform_driver_unregister(&ohci_hcd_pxa27x_driver);
 353 }
 354
 355 module_init (ohci_hcd_pxa27x_init);
 356 module_exit (ohci_hcd_pxa27x_cleanup);