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