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(CKEN_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(CKEN_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         if (inf->power_budget)
 189                 hcd->power_budget = inf->power_budget;
 190
 191         ohci_hcd_init(hcd_to_ohci(hcd));
 192
 193         retval = usb_add_hcd(hcd, pdev->resource[1].start, IRQF_DISABLED);
 194         if (retval == 0)
 195                 return retval;
 196
 197         pxa27x_stop_hc(&pdev->dev);
 198  err3:
 199         iounmap(hcd->regs);
 200  err2:
 201         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 202  err1:
 203         usb_put_hcd(hcd);
 204         return retval;
 205 }
 206
 207
 208 /* may be called without controller electrically present */
 209 /* may be called with controller, bus, and devices active */
 210
 211 /**
 212  * usb_hcd_pxa27x_remove - shutdown processing for pxa27x-based HCDs
 213  * @dev: USB Host Controller being removed
 214  * Context: !in_interrupt()
 215  *
 216  * Reverses the effect of usb_hcd_pxa27x_probe(), first invoking
 217  * the HCD's stop() method.  It is always called from a thread
 218  * context, normally "rmmod", "apmd", or something similar.
 219  *
 220  */
 221 void usb_hcd_pxa27x_remove (struct usb_hcd *hcd, struct platform_device *pdev)
 222 {
 223         usb_remove_hcd(hcd);
 224         pxa27x_stop_hc(&pdev->dev);
 225         iounmap(hcd->regs);
 226         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 227         usb_put_hcd(hcd);
 228 }
 229
 230 /*-------------------------------------------------------------------------*/
 231
 232 static int __devinit
 233 ohci_pxa27x_start (struct usb_hcd *hcd)
 234 {
 235         struct ohci_hcd *ohci = hcd_to_ohci (hcd);
 236         int             ret;
 237
 238         ohci_dbg (ohci, "ohci_pxa27x_start, ohci:%p", ohci);
 239
 240         /* The value of NDP in roothub_a is incorrect on this hardware */
 241         ohci->num_ports = 3;
 242
 243         if ((ret = ohci_init(ohci)) < 0)
 244                 return ret;
 245
 246         if ((ret = ohci_run (ohci)) < 0) {
 247                 err ("can't start %s", hcd->self.bus_name);
 248                 ohci_stop (hcd);
 249                 return ret;
 250         }
 251
 252         return 0;
 253 }
 254
 255 /*-------------------------------------------------------------------------*/
 256
 257 static const struct hc_driver ohci_pxa27x_hc_driver = {
 258         .description =          hcd_name,
 259         .product_desc =         "PXA27x OHCI",
 260         .hcd_priv_size =        sizeof(struct ohci_hcd),
 261
 262         /*
 263          * generic hardware linkage
 264          */
 265         .irq =                  ohci_irq,
 266         .flags =                HCD_USB11 | HCD_MEMORY,
 267
 268         /*
 269          * basic lifecycle operations
 270          */
 271         .start =                ohci_pxa27x_start,
 272         .stop =                 ohci_stop,
 273         .shutdown =             ohci_shutdown,
 274
 275         /*
 276          * managing i/o requests and associated device resources
 277          */
 278         .urb_enqueue =          ohci_urb_enqueue,
 279         .urb_dequeue =          ohci_urb_dequeue,
 280         .endpoint_disable =     ohci_endpoint_disable,
 281
 282         /*
 283          * scheduling support
 284          */
 285         .get_frame_number =     ohci_get_frame,
 286
 287         /*
 288          * root hub support
 289          */
 290         .hub_status_data =      ohci_hub_status_data,
 291         .hub_control =          ohci_hub_control,
 292         .hub_irq_enable =       ohci_rhsc_enable,
 293 #ifdef  CONFIG_PM
 294         .bus_suspend =          ohci_bus_suspend,
 295         .bus_resume =           ohci_bus_resume,
 296 #endif
 297         .start_port_reset =     ohci_start_port_reset,
 298 };
 299
 300 /*-------------------------------------------------------------------------*/
 301
 302 static int ohci_hcd_pxa27x_drv_probe(struct platform_device *pdev)
 303 {
 304         pr_debug ("In ohci_hcd_pxa27x_drv_probe");
 305
 306         if (usb_disabled())
 307                 return -ENODEV;
 308
 309         return usb_hcd_pxa27x_probe(&ohci_pxa27x_hc_driver, pdev);
 310 }
 311
 312 static int ohci_hcd_pxa27x_drv_remove(struct platform_device *pdev)
 313 {
 314         struct usb_hcd *hcd = platform_get_drvdata(pdev);
 315
 316         usb_hcd_pxa27x_remove(hcd, pdev);
 317         platform_set_drvdata(pdev, NULL);
 318         return 0;
 319 }
 320
 321 #ifdef  CONFIG_PM
 322 static int ohci_hcd_pxa27x_drv_suspend(struct platform_device *pdev, pm_message_t state)
 323 {
 324         struct usb_hcd *hcd = platform_get_drvdata(pdev);
 325         struct ohci_hcd *ohci = hcd_to_ohci(hcd);
 326
 327         if (time_before(jiffies, ohci->next_statechange))
 328                 msleep(5);
 329         ohci->next_statechange = jiffies;
 330
 331         pxa27x_stop_hc(&pdev->dev);
 332         hcd->state = HC_STATE_SUSPENDED;
 333         pdev->dev.power.power_state = PMSG_SUSPEND;
 334
 335         return 0;
 336 }
 337
 338 static int ohci_hcd_pxa27x_drv_resume(struct platform_device *pdev)
 339 {
 340         struct usb_hcd *hcd = platform_get_drvdata(pdev);
 341         struct ohci_hcd *ohci = hcd_to_ohci(hcd);
 342         int status;
 343
 344         if (time_before(jiffies, ohci->next_statechange))
 345                 msleep(5);
 346         ohci->next_statechange = jiffies;
 347
 348         if ((status = pxa27x_start_hc(&pdev->dev)) < 0)
 349                 return status;
 350
 351         pdev->dev.power.power_state = PMSG_ON;
 352         usb_hcd_resume_root_hub(hcd);
 353
 354         return 0;
 355 }
 356 #endif
 357
 358
 359 static struct platform_driver ohci_hcd_pxa27x_driver = {
 360         .probe          = ohci_hcd_pxa27x_drv_probe,
 361         .remove         = ohci_hcd_pxa27x_drv_remove,
 362         .shutdown       = usb_hcd_platform_shutdown,
 363 #ifdef CONFIG_PM
 364         .suspend        = ohci_hcd_pxa27x_drv_suspend,
 365         .resume         = ohci_hcd_pxa27x_drv_resume,
 366 #endif
 367         .driver         = {
 368                 .name   = "pxa27x-ohci",
 369         },
 370 };
 371