drivers/usb/host/ohci-omap.c

   1 /*
   2  * OHCI HCD (Host Controller Driver) for USB.
   3  *
   4  * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
   5  * (C) Copyright 2000-2005 David Brownell
   6  * (C) Copyright 2002 Hewlett-Packard Company
   7  *
   8  * OMAP Bus Glue
   9  *
  10  * Modified for OMAP by Tony Lindgren <tony@atomide.com>
  11  * Based on the 2.4 OMAP OHCI driver originally done by MontaVista Software Inc.
  12  * and on ohci-sa1111.c by Christopher Hoover <ch@hpl.hp.com>
  13  *
  14  * This file is licenced under the GPL.
  15  */
  16
  17 #include <asm/hardware.h>
  18 #include <asm/io.h>
  19 #include <asm/mach-types.h>
  20
  21 #include <asm/arch/hardware.h>
  22 #include <asm/arch/mux.h>
  23 #include <asm/arch/irqs.h>
  24 #include <asm/arch/gpio.h>
  25 #include <asm/arch/fpga.h>
  26 #include <asm/arch/usb.h>
  27 #include <asm/hardware/clock.h>
  28
  29
  30 /* OMAP-1510 OHCI has its own MMU for DMA */
  31 #define OMAP1510_LB_MEMSIZE     32      /* Should be same as SDRAM size */
  32 #define OMAP1510_LB_CLOCK_DIV   0xfffec10c
  33 #define OMAP1510_LB_MMU_CTL     0xfffec208
  34 #define OMAP1510_LB_MMU_LCK     0xfffec224
  35 #define OMAP1510_LB_MMU_LD_TLB  0xfffec228
  36 #define OMAP1510_LB_MMU_CAM_H   0xfffec22c
  37 #define OMAP1510_LB_MMU_CAM_L   0xfffec230
  38 #define OMAP1510_LB_MMU_RAM_H   0xfffec234
  39 #define OMAP1510_LB_MMU_RAM_L   0xfffec238
  40
  41
  42 #ifndef CONFIG_ARCH_OMAP
  43 #error "This file is OMAP bus glue.  CONFIG_OMAP must be defined."
  44 #endif
  45
  46 #ifdef CONFIG_TPS65010
  47 #include <asm/arch/tps65010.h>
  48 #else
  49
  50 #define LOW     0
  51 #define HIGH    1
  52
  53 #define GPIO1   1
  54
  55 static inline int tps65010_set_gpio_out_value(unsigned gpio, unsigned value)
  56 {
  57         return 0;
  58 }
  59
  60 #endif
  61
  62 extern int usb_disabled(void);
  63 extern int ocpi_enable(void);
  64
  65 static struct clk *usb_host_ck;
  66
  67 static void omap_ohci_clock_power(int on)
  68 {
  69         if (on) {
  70                 clk_enable(usb_host_ck);
  71                 /* guesstimate for T5 == 1x 32K clock + APLL lock time */
  72                 udelay(100);
  73         } else {
  74                 clk_disable(usb_host_ck);
  75         }
  76 }
  77
  78 /*
  79  * Board specific gang-switched transceiver power on/off.
  80  * NOTE:  OSK supplies power from DC, not battery.
  81  */
  82 static int omap_ohci_transceiver_power(int on)
  83 {
  84         if (on) {
  85                 if (machine_is_omap_innovator() && cpu_is_omap1510())
  86                         fpga_write(fpga_read(INNOVATOR_FPGA_CAM_USB_CONTROL)
  87                                 | ((1 << 5/*usb1*/) | (1 << 3/*usb2*/)),
  88                                INNOVATOR_FPGA_CAM_USB_CONTROL);
  89                 else if (machine_is_omap_osk())
  90                         tps65010_set_gpio_out_value(GPIO1, LOW);
  91         } else {
  92                 if (machine_is_omap_innovator() && cpu_is_omap1510())
  93                         fpga_write(fpga_read(INNOVATOR_FPGA_CAM_USB_CONTROL)
  94                                 & ~((1 << 5/*usb1*/) | (1 << 3/*usb2*/)),
  95                                INNOVATOR_FPGA_CAM_USB_CONTROL);
  96                 else if (machine_is_omap_osk())
  97                         tps65010_set_gpio_out_value(GPIO1, HIGH);
  98         }
  99
 100         return 0;
 101 }
 102
 103 /*
 104  * OMAP-1510 specific Local Bus clock on/off
 105  */
 106 static int omap_1510_local_bus_power(int on)
 107 {
 108         if (on) {
 109                 omap_writel((1 << 1) | (1 << 0), OMAP1510_LB_MMU_CTL);
 110                 udelay(200);
 111         } else {
 112                 omap_writel(0, OMAP1510_LB_MMU_CTL);
 113         }
 114
 115         return 0;
 116 }
 117
 118 /*
 119  * OMAP-1510 specific Local Bus initialization
 120  * NOTE: This assumes 32MB memory size in OMAP1510LB_MEMSIZE.
 121  *       See also arch/mach-omap/memory.h for __virt_to_dma() and
 122  *       __dma_to_virt() which need to match with the physical
 123  *       Local Bus address below.
 124  */
 125 static int omap_1510_local_bus_init(void)
 126 {
 127         unsigned int tlb;
 128         unsigned long lbaddr, physaddr;
 129
 130         omap_writel((omap_readl(OMAP1510_LB_CLOCK_DIV) & 0xfffffff8) | 0x4,
 131                OMAP1510_LB_CLOCK_DIV);
 132
 133         /* Configure the Local Bus MMU table */
 134         for (tlb = 0; tlb < OMAP1510_LB_MEMSIZE; tlb++) {
 135                 lbaddr = tlb * 0x00100000 + OMAP1510_LB_OFFSET;
 136                 physaddr = tlb * 0x00100000 + PHYS_OFFSET;
 137                 omap_writel((lbaddr & 0x0fffffff) >> 22, OMAP1510_LB_MMU_CAM_H);
 138                 omap_writel(((lbaddr & 0x003ffc00) >> 6) | 0xc,
 139                        OMAP1510_LB_MMU_CAM_L);
 140                 omap_writel(physaddr >> 16, OMAP1510_LB_MMU_RAM_H);
 141                 omap_writel((physaddr & 0x0000fc00) | 0x300, OMAP1510_LB_MMU_RAM_L);
 142                 omap_writel(tlb << 4, OMAP1510_LB_MMU_LCK);
 143                 omap_writel(0x1, OMAP1510_LB_MMU_LD_TLB);
 144         }
 145
 146         /* Enable the walking table */
 147         omap_writel(omap_readl(OMAP1510_LB_MMU_CTL) | (1 << 3), OMAP1510_LB_MMU_CTL);
 148         udelay(200);
 149
 150         return 0;
 151 }
 152
 153 #ifdef  CONFIG_USB_OTG
 154
 155 static void start_hnp(struct ohci_hcd *ohci)
 156 {
 157         const unsigned  port = ohci_to_hcd(ohci)->self.otg_port - 1;
 158         unsigned long   flags;
 159
 160         otg_start_hnp(ohci->transceiver);
 161
 162         local_irq_save(flags);
 163         ohci->transceiver->state = OTG_STATE_A_SUSPEND;
 164         writel (RH_PS_PSS, &ohci->regs->roothub.portstatus [port]);
 165         OTG_CTRL_REG &= ~OTG_A_BUSREQ;
 166         local_irq_restore(flags);
 167 }
 168
 169 #endif
 170
 171 /*-------------------------------------------------------------------------*/
 172
 173 static int omap_start_hc(struct ohci_hcd *ohci, struct platform_device *pdev)
 174 {
 175         struct omap_usb_config  *config = pdev->dev.platform_data;
 176         int                     need_transceiver = (config->otg != 0);
 177         int                     ret;
 178
 179         dev_dbg(&pdev->dev, "starting USB Controller\n");
 180
 181         if (config->otg) {
 182                 ohci_to_hcd(ohci)->self.otg_port = config->otg;
 183                 /* default/minimum OTG power budget:  8 mA */
 184                 ohci->power_budget = 8;
 185         }
 186
 187         /* boards can use OTG transceivers in non-OTG modes */
 188         need_transceiver = need_transceiver
 189                         || machine_is_omap_h2() || machine_is_omap_h3();
 190
 191         if (cpu_is_omap16xx())
 192                 ocpi_enable();
 193
 194 #ifdef  CONFIG_ARCH_OMAP_OTG
 195         if (need_transceiver) {
 196                 ohci->transceiver = otg_get_transceiver();
 197                 if (ohci->transceiver) {
 198                         int     status = otg_set_host(ohci->transceiver,
 199                                                 &ohci_to_hcd(ohci)->self);
 200                         dev_dbg(&pdev->dev, "init %s transceiver, status %d\n",
 201                                         ohci->transceiver->label, status);
 202                         if (status) {
 203                                 if (ohci->transceiver)
 204                                         put_device(ohci->transceiver->dev);
 205                                 return status;
 206                         }
 207                 } else {
 208                         dev_err(&pdev->dev, "can't find transceiver\n");
 209                         return -ENODEV;
 210                 }
 211         }
 212 #endif
 213
 214         omap_ohci_clock_power(1);
 215
 216         if (cpu_is_omap1510()) {
 217                 omap_1510_local_bus_power(1);
 218                 omap_1510_local_bus_init();
 219         }
 220
 221         if ((ret = ohci_init(ohci)) < 0)
 222                 return ret;
 223
 224         /* board-specific power switching and overcurrent support */
 225         if (machine_is_omap_osk() || machine_is_omap_innovator()) {
 226                 u32     rh = roothub_a (ohci);
 227
 228                 /* power switching (ganged by default) */
 229                 rh &= ~RH_A_NPS;
 230
 231                 /* TPS2045 switch for internal transceiver (port 1) */
 232                 if (machine_is_omap_osk()) {
 233                         ohci->power_budget = 250;
 234
 235                         rh &= ~RH_A_NOCP;
 236
 237                         /* gpio9 for overcurrent detction */
 238                         omap_cfg_reg(W8_1610_GPIO9);
 239                         omap_request_gpio(9);
 240                         omap_set_gpio_direction(9, 1 /* IN */);
 241
 242                         /* for paranoia's sake:  disable USB.PUEN */
 243                         omap_cfg_reg(W4_USB_HIGHZ);
 244                 }
 245                 ohci_writel(ohci, rh, &ohci->regs->roothub.a);
 246                 distrust_firmware = 0;
 247         }
 248
 249         /* FIXME khubd hub requests should manage power switching */
 250         omap_ohci_transceiver_power(1);
 251
 252         /* board init will have already handled HMC and mux setup.
 253          * any external transceiver should already be initialized
 254          * too, so all configured ports use the right signaling now.
 255          */
 256
 257         return 0;
 258 }
 259
 260 static void omap_stop_hc(struct platform_device *pdev)
 261 {
 262         dev_dbg(&pdev->dev, "stopping USB Controller\n");
 263         omap_ohci_clock_power(0);
 264 }
 265
 266
 267 /*-------------------------------------------------------------------------*/
 268
 269 void usb_hcd_omap_remove (struct usb_hcd *, struct platform_device *);
 270
 271 /* configure so an HC device and id are always provided */
 272 /* always called with process context; sleeping is OK */
 273
 274
 275 /**
 276  * usb_hcd_omap_probe - initialize OMAP-based HCDs
 277  * Context: !in_interrupt()
 278  *
 279  * Allocates basic resources for this USB host controller, and
 280  * then invokes the start() method for the HCD associated with it
 281  * through the hotplug entry's driver_data.
 282  */
 283 int usb_hcd_omap_probe (const struct hc_driver *driver,
 284                           struct platform_device *pdev)
 285 {
 286         int retval;
 287         struct usb_hcd *hcd = 0;
 288         struct ohci_hcd *ohci;
 289
 290         if (pdev->num_resources != 2) {
 291                 printk(KERN_ERR "hcd probe: invalid num_resources: %i\n",
 292                        pdev->num_resources);
 293                 return -ENODEV;
 294         }
 295
 296         if (pdev->resource[0].flags != IORESOURCE_MEM
 297                         || pdev->resource[1].flags != IORESOURCE_IRQ) {
 298                 printk(KERN_ERR "hcd probe: invalid resource type\n");
 299                 return -ENODEV;
 300         }
 301
 302         usb_host_ck = clk_get(0, "usb_hhc_ck");
 303         if (IS_ERR(usb_host_ck))
 304                 return PTR_ERR(usb_host_ck);
 305
 306         hcd = usb_create_hcd (driver, &pdev->dev, pdev->dev.bus_id);
 307         if (!hcd) {
 308                 retval = -ENOMEM;
 309                 goto err0;
 310         }
 311         hcd->rsrc_start = pdev->resource[0].start;
 312         hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1;
 313
 314         if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
 315                 dev_dbg(&pdev->dev, "request_mem_region failed\n");
 316                 retval = -EBUSY;
 317                 goto err1;
 318         }
 319
 320         hcd->regs = (void __iomem *) (int) IO_ADDRESS(hcd->rsrc_start);
 321
 322         ohci = hcd_to_ohci(hcd);
 323         ohci_hcd_init(ohci);
 324
 325         retval = omap_start_hc(ohci, pdev);
 326         if (retval < 0)
 327                 goto err2;
 328
 329         retval = usb_add_hcd(hcd, platform_get_irq(pdev, 0), SA_INTERRUPT);
 330         if (retval == 0)
 331                 return retval;
 332
 333         omap_stop_hc(pdev);
 334 err2:
 335         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 336 err1:
 337         usb_put_hcd(hcd);
 338 err0:
 339         clk_put(usb_host_ck);
 340         return retval;
 341 }
 342
 343
 344 /* may be called with controller, bus, and devices active */
 345
 346 /**
 347  * usb_hcd_omap_remove - shutdown processing for OMAP-based HCDs
 348  * @dev: USB Host Controller being removed
 349  * Context: !in_interrupt()
 350  *
 351  * Reverses the effect of usb_hcd_omap_probe(), first invoking
 352  * the HCD's stop() method.  It is always called from a thread
 353  * context, normally "rmmod", "apmd", or something similar.
 354  *
 355  */
 356 void usb_hcd_omap_remove (struct usb_hcd *hcd, struct platform_device *pdev)
 357 {
 358         usb_remove_hcd(hcd);
 359         if (machine_is_omap_osk())
 360                 omap_free_gpio(9);
 361         omap_stop_hc(pdev);
 362         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 363         usb_put_hcd(hcd);
 364         clk_put(usb_host_ck);
 365 }
 366
 367 /*-------------------------------------------------------------------------*/
 368
 369 static int __devinit
 370 ohci_omap_start (struct usb_hcd *hcd)
 371 {
 372         struct omap_usb_config *config;
 373         struct ohci_hcd *ohci = hcd_to_ohci (hcd);
 374         int             ret;
 375
 376         config = hcd->self.controller->platform_data;
 377         if (config->otg || config->rwc)
 378                 writel(OHCI_CTRL_RWC, &ohci->regs->control);
 379
 380         if ((ret = ohci_run (ohci)) < 0) {
 381                 dev_err(hcd->self.controller, "can't start\n");
 382                 ohci_stop (hcd);
 383                 return ret;
 384         }
 385         return 0;
 386 }
 387
 388 /*-------------------------------------------------------------------------*/
 389
 390 static const struct hc_driver ohci_omap_hc_driver = {
 391         .description =          hcd_name,
 392         .product_desc =         "OMAP OHCI",
 393         .hcd_priv_size =        sizeof(struct ohci_hcd),
 394
 395         /*
 396          * generic hardware linkage
 397          */
 398         .irq =                  ohci_irq,
 399         .flags =                HCD_USB11 | HCD_MEMORY,
 400
 401         /*
 402          * basic lifecycle operations
 403          */
 404         .start =                ohci_omap_start,
 405         .stop =                 ohci_stop,
 406
 407         /*
 408          * managing i/o requests and associated device resources
 409          */
 410         .urb_enqueue =          ohci_urb_enqueue,
 411         .urb_dequeue =          ohci_urb_dequeue,
 412         .endpoint_disable =     ohci_endpoint_disable,
 413
 414         /*
 415          * scheduling support
 416          */
 417         .get_frame_number =     ohci_get_frame,
 418
 419         /*
 420          * root hub support
 421          */
 422         .hub_status_data =      ohci_hub_status_data,
 423         .hub_control =          ohci_hub_control,
 424 #ifdef  CONFIG_USB_SUSPEND
 425         .hub_suspend =          ohci_hub_suspend,
 426         .hub_resume =           ohci_hub_resume,
 427 #endif
 428         .start_port_reset =     ohci_start_port_reset,
 429 };
 430
 431 /*-------------------------------------------------------------------------*/
 432
 433 static int ohci_hcd_omap_drv_probe(struct device *dev)
 434 {
 435         return usb_hcd_omap_probe(&ohci_omap_hc_driver,
 436                                 to_platform_device(dev));
 437 }
 438
 439 static int ohci_hcd_omap_drv_remove(struct device *dev)
 440 {
 441         struct platform_device  *pdev = to_platform_device(dev);
 442         struct usb_hcd          *hcd = dev_get_drvdata(dev);
 443         struct ohci_hcd         *ohci = hcd_to_ohci (hcd);
 444
 445         usb_hcd_omap_remove(hcd, pdev);
 446         if (ohci->transceiver) {
 447                 (void) otg_set_host(ohci->transceiver, 0);
 448                 put_device(ohci->transceiver->dev);
 449         }
 450         dev_set_drvdata(dev, NULL);
 451
 452         return 0;
 453 }
 454
 455 /*-------------------------------------------------------------------------*/
 456
 457 #ifdef  CONFIG_PM
 458
 459 /* states match PCI usage, always suspending the root hub except that
 460  * 4 ~= D3cold (ACPI D3) with clock off (resume sees reset).
 461  */
 462
 463 static int ohci_omap_suspend(struct device *dev, u32 state, u32 level)
 464 {
 465         struct ohci_hcd *ohci = hcd_to_ohci(dev_get_drvdata(dev));
 466         int             status = -EINVAL;
 467
 468         if (level != SUSPEND_POWER_DOWN)
 469                 return 0;
 470         if (state <= dev->power.power_state)
 471                 return 0;
 472
 473         dev_dbg(dev, "suspend to %d\n", state);
 474         down(&ohci_to_hcd(ohci)->self.root_hub->serialize);
 475         status = ohci_hub_suspend(ohci_to_hcd(ohci));
 476         if (status == 0) {
 477                 if (state >= 4) {
 478                         omap_ohci_clock_power(0);
 479                         ohci_to_hcd(ohci)->self.root_hub->state =
 480                                         USB_STATE_SUSPENDED;
 481                         state = 4;
 482                 }
 483                 ohci_to_hcd(ohci)->state = HC_STATE_SUSPENDED;
 484                 dev->power.power_state = state;
 485         }
 486         up(&ohci_to_hcd(ohci)->self.root_hub->serialize);
 487         return status;
 488 }
 489
 490 static int ohci_omap_resume(struct device *dev, u32 level)
 491 {
 492         struct ohci_hcd *ohci = hcd_to_ohci(dev_get_drvdata(dev));
 493         int             status = 0;
 494
 495         if (level != RESUME_POWER_ON)
 496                 return 0;
 497
 498         switch (dev->power.power_state) {
 499         case 0:
 500                 break;
 501         case 4:
 502                 if (time_before(jiffies, ohci->next_statechange))
 503                         msleep(5);
 504                 ohci->next_statechange = jiffies;
 505                 omap_ohci_clock_power(1);
 506                 /* FALLTHROUGH */
 507         default:
 508                 dev_dbg(dev, "resume from %d\n", dev->power.power_state);
 509 #ifdef  CONFIG_USB_SUSPEND
 510                 /* get extra cleanup even if remote wakeup isn't in use */
 511                 status = usb_resume_device(ohci_to_hcd(ohci)->self.root_hub);
 512 #else
 513                 down(&ohci_to_hcd(ohci)->self.root_hub->serialize);
 514                 status = ohci_hub_resume(ohci_to_hcd(ohci));
 515                 up(&ohci_to_hcd(ohci)->self.root_hub->serialize);
 516 #endif
 517                 if (status == 0)
 518                         dev->power.power_state = 0;
 519                 break;
 520         }
 521         return status;
 522 }
 523
 524 #endif
 525
 526 /*-------------------------------------------------------------------------*/
 527
 528 /*
 529  * Driver definition to register with the OMAP bus
 530  */
 531 static struct device_driver ohci_hcd_omap_driver = {
 532         .name           = "ohci",
 533         .bus            = &platform_bus_type,
 534         .probe          = ohci_hcd_omap_drv_probe,
 535         .remove         = ohci_hcd_omap_drv_remove,
 536 #ifdef  CONFIG_PM
 537         .suspend        = ohci_omap_suspend,
 538         .resume         = ohci_omap_resume,
 539 #endif
 540 };
 541
 542 static int __init ohci_hcd_omap_init (void)
 543 {
 544         printk (KERN_DEBUG "%s: " DRIVER_INFO " (OMAP)\n", hcd_name);
 545         if (usb_disabled())
 546                 return -ENODEV;
 547
 548         pr_debug("%s: block sizes: ed %Zd td %Zd\n", hcd_name,
 549                 sizeof (struct ed), sizeof (struct td));
 550
 551         return driver_register(&ohci_hcd_omap_driver);
 552 }
 553
 554 static void __exit ohci_hcd_omap_cleanup (void)
 555 {
 556         driver_unregister(&ohci_hcd_omap_driver);
 557 }
 558
 559 module_init (ohci_hcd_omap_init);
 560 module_exit (ohci_hcd_omap_cleanup);