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 <linux/signal.h>
  18 #include <linux/jiffies.h>
  19 #include <linux/platform_device.h>
  20 #include <linux/clk.h>
  21 #include <linux/err.h>
  22 #include <linux/gpio.h>
  23
  24 #include <asm/io.h>
  25 #include <asm/mach-types.h>
  26
  27 #include <mach/mux.h>
  28 #include <plat/fpga.h>
  29
  30 #include <mach/hardware.h>
  31 #include <mach/irqs.h>
  32 #include <mach/usb.h>
  33
  34
  35 /* OMAP-1510 OHCI has its own MMU for DMA */
  36 #define OMAP1510_LB_MEMSIZE     32      /* Should be same as SDRAM size */
  37 #define OMAP1510_LB_CLOCK_DIV   0xfffec10c
  38 #define OMAP1510_LB_MMU_CTL     0xfffec208
  39 #define OMAP1510_LB_MMU_LCK     0xfffec224
  40 #define OMAP1510_LB_MMU_LD_TLB  0xfffec228
  41 #define OMAP1510_LB_MMU_CAM_H   0xfffec22c
  42 #define OMAP1510_LB_MMU_CAM_L   0xfffec230
  43 #define OMAP1510_LB_MMU_RAM_H   0xfffec234
  44 #define OMAP1510_LB_MMU_RAM_L   0xfffec238
  45
  46
  47 #ifndef CONFIG_ARCH_OMAP
  48 #error "This file is OMAP bus glue.  CONFIG_OMAP must be defined."
  49 #endif
  50
  51 #ifdef CONFIG_TPS65010
  52 #include <linux/i2c/tps65010.h>
  53 #else
  54
  55 #define LOW     0
  56 #define HIGH    1
  57
  58 #define GPIO1   1
  59
  60 static inline int tps65010_set_gpio_out_value(unsigned gpio, unsigned value)
  61 {
  62         return 0;
  63 }
  64
  65 #endif
  66
  67 extern int usb_disabled(void);
  68 extern int ocpi_enable(void);
  69
  70 static struct clk *usb_host_ck;
  71 static struct clk *usb_dc_ck;
  72 static int host_enabled;
  73 static int host_initialized;
  74
  75 static void omap_ohci_clock_power(int on)
  76 {
  77         if (on) {
  78                 clk_enable(usb_dc_ck);
  79                 clk_enable(usb_host_ck);
  80                 /* guesstimate for T5 == 1x 32K clock + APLL lock time */
  81                 udelay(100);
  82         } else {
  83                 clk_disable(usb_host_ck);
  84                 clk_disable(usb_dc_ck);
  85         }
  86 }
  87
  88 /*
  89  * Board specific gang-switched transceiver power on/off.
  90  * NOTE:  OSK supplies power from DC, not battery.
  91  */
  92 static int omap_ohci_transceiver_power(int on)
  93 {
  94         if (on) {
  95                 if (machine_is_omap_innovator() && cpu_is_omap1510())
  96                         fpga_write(fpga_read(INNOVATOR_FPGA_CAM_USB_CONTROL)
  97                                 | ((1 << 5/*usb1*/) | (1 << 3/*usb2*/)),
  98                                INNOVATOR_FPGA_CAM_USB_CONTROL);
  99                 else if (machine_is_omap_osk())
 100                         tps65010_set_gpio_out_value(GPIO1, LOW);
 101         } else {
 102                 if (machine_is_omap_innovator() && cpu_is_omap1510())
 103                         fpga_write(fpga_read(INNOVATOR_FPGA_CAM_USB_CONTROL)
 104                                 & ~((1 << 5/*usb1*/) | (1 << 3/*usb2*/)),
 105                                INNOVATOR_FPGA_CAM_USB_CONTROL);
 106                 else if (machine_is_omap_osk())
 107                         tps65010_set_gpio_out_value(GPIO1, HIGH);
 108         }
 109
 110         return 0;
 111 }
 112
 113 #ifdef CONFIG_ARCH_OMAP15XX
 114 /*
 115  * OMAP-1510 specific Local Bus clock on/off
 116  */
 117 static int omap_1510_local_bus_power(int on)
 118 {
 119         if (on) {
 120                 omap_writel((1 << 1) | (1 << 0), OMAP1510_LB_MMU_CTL);
 121                 udelay(200);
 122         } else {
 123                 omap_writel(0, OMAP1510_LB_MMU_CTL);
 124         }
 125
 126         return 0;
 127 }
 128
 129 /*
 130  * OMAP-1510 specific Local Bus initialization
 131  * NOTE: This assumes 32MB memory size in OMAP1510LB_MEMSIZE.
 132  *       See also arch/mach-omap/memory.h for __virt_to_dma() and
 133  *       __dma_to_virt() which need to match with the physical
 134  *       Local Bus address below.
 135  */
 136 static int omap_1510_local_bus_init(void)
 137 {
 138         unsigned int tlb;
 139         unsigned long lbaddr, physaddr;
 140
 141         omap_writel((omap_readl(OMAP1510_LB_CLOCK_DIV) & 0xfffffff8) | 0x4,
 142                OMAP1510_LB_CLOCK_DIV);
 143
 144         /* Configure the Local Bus MMU table */
 145         for (tlb = 0; tlb < OMAP1510_LB_MEMSIZE; tlb++) {
 146                 lbaddr = tlb * 0x00100000 + OMAP1510_LB_OFFSET;
 147                 physaddr = tlb * 0x00100000 + PHYS_OFFSET;
 148                 omap_writel((lbaddr & 0x0fffffff) >> 22, OMAP1510_LB_MMU_CAM_H);
 149                 omap_writel(((lbaddr & 0x003ffc00) >> 6) | 0xc,
 150                        OMAP1510_LB_MMU_CAM_L);
 151                 omap_writel(physaddr >> 16, OMAP1510_LB_MMU_RAM_H);
 152                 omap_writel((physaddr & 0x0000fc00) | 0x300, OMAP1510_LB_MMU_RAM_L);
 153                 omap_writel(tlb << 4, OMAP1510_LB_MMU_LCK);
 154                 omap_writel(0x1, OMAP1510_LB_MMU_LD_TLB);
 155         }
 156
 157         /* Enable the walking table */
 158         omap_writel(omap_readl(OMAP1510_LB_MMU_CTL) | (1 << 3), OMAP1510_LB_MMU_CTL);
 159         udelay(200);
 160
 161         return 0;
 162 }
 163 #else
 164 #define omap_1510_local_bus_power(x)    {}
 165 #define omap_1510_local_bus_init()      {}
 166 #endif
 167
 168 #ifdef  CONFIG_USB_OTG
 169
 170 static void start_hnp(struct ohci_hcd *ohci)
 171 {
 172         struct usb_hcd *hcd = ohci_to_hcd(ohci);
 173         const unsigned  port = hcd->self.otg_port - 1;
 174         unsigned long   flags;
 175         u32 l;
 176
 177         otg_start_hnp(hcd->phy->otg);
 178
 179         local_irq_save(flags);
 180         hcd->phy->state = OTG_STATE_A_SUSPEND;
 181         writel (RH_PS_PSS, &ohci->regs->roothub.portstatus [port]);
 182         l = omap_readl(OTG_CTRL);
 183         l &= ~OTG_A_BUSREQ;
 184         omap_writel(l, OTG_CTRL);
 185         local_irq_restore(flags);
 186 }
 187
 188 #endif
 189
 190 /*-------------------------------------------------------------------------*/
 191
 192 static int ohci_omap_init(struct usb_hcd *hcd)
 193 {
 194         struct ohci_hcd         *ohci = hcd_to_ohci(hcd);
 195         struct omap_usb_config  *config = hcd->self.controller->platform_data;
 196         int                     need_transceiver = (config->otg != 0);
 197         int                     ret;
 198
 199         dev_dbg(hcd->self.controller, "starting USB Controller\n");
 200
 201         if (config->otg) {
 202                 ohci_to_hcd(ohci)->self.otg_port = config->otg;
 203                 /* default/minimum OTG power budget:  8 mA */
 204                 ohci_to_hcd(ohci)->power_budget = 8;
 205         }
 206
 207         /* boards can use OTG transceivers in non-OTG modes */
 208         need_transceiver = need_transceiver
 209                         || machine_is_omap_h2() || machine_is_omap_h3();
 210
 211         /* XXX OMAP16xx only */
 212         if (config->ocpi_enable)
 213                 config->ocpi_enable();
 214
 215 #ifdef  CONFIG_USB_OTG
 216         if (need_transceiver) {
 217                 hcd->phy = usb_get_phy(USB_PHY_TYPE_USB2);
 218                 if (!IS_ERR_OR_NULL(hcd->phy)) {
 219                         int     status = otg_set_host(hcd->phy->otg,
 220                                                 &ohci_to_hcd(ohci)->self);
 221                         dev_dbg(hcd->self.controller, "init %s phy, status %d\n",
 222                                         hcd->phy->label, status);
 223                         if (status) {
 224                                 usb_put_phy(hcd->phy);
 225                                 return status;
 226                         }
 227                 } else {
 228                         dev_err(hcd->self.controller, "can't find phy\n");
 229                         return -ENODEV;
 230                 }
 231                 ohci->start_hnp = start_hnp;
 232         }
 233 #endif
 234
 235         omap_ohci_clock_power(1);
 236
 237         if (cpu_is_omap15xx()) {
 238                 omap_1510_local_bus_power(1);
 239                 omap_1510_local_bus_init();
 240         }
 241
 242         if ((ret = ohci_init(ohci)) < 0)
 243                 return ret;
 244
 245         /* board-specific power switching and overcurrent support */
 246         if (machine_is_omap_osk() || machine_is_omap_innovator()) {
 247                 u32     rh = roothub_a (ohci);
 248
 249                 /* power switching (ganged by default) */
 250                 rh &= ~RH_A_NPS;
 251
 252                 /* TPS2045 switch for internal transceiver (port 1) */
 253                 if (machine_is_omap_osk()) {
 254                         ohci_to_hcd(ohci)->power_budget = 250;
 255
 256                         rh &= ~RH_A_NOCP;
 257
 258                         /* gpio9 for overcurrent detction */
 259                         omap_cfg_reg(W8_1610_GPIO9);
 260                         gpio_request(9, "OHCI overcurrent");
 261                         gpio_direction_input(9);
 262
 263                         /* for paranoia's sake:  disable USB.PUEN */
 264                         omap_cfg_reg(W4_USB_HIGHZ);
 265                 }
 266                 ohci_writel(ohci, rh, &ohci->regs->roothub.a);
 267                 ohci->flags &= ~OHCI_QUIRK_HUB_POWER;
 268         } else if (machine_is_nokia770()) {
 269                 /* We require a self-powered hub, which should have
 270                  * plenty of power. */
 271                 ohci_to_hcd(ohci)->power_budget = 0;
 272         }
 273
 274         /* FIXME khubd hub requests should manage power switching */
 275         omap_ohci_transceiver_power(1);
 276
 277         /* board init will have already handled HMC and mux setup.
 278          * any external transceiver should already be initialized
 279          * too, so all configured ports use the right signaling now.
 280          */
 281
 282         return 0;
 283 }
 284
 285 static void ohci_omap_stop(struct usb_hcd *hcd)
 286 {
 287         dev_dbg(hcd->self.controller, "stopping USB Controller\n");
 288         ohci_stop(hcd);
 289         omap_ohci_clock_power(0);
 290 }
 291
 292
 293 /*-------------------------------------------------------------------------*/
 294
 295 /**
 296  * usb_hcd_omap_probe - initialize OMAP-based HCDs
 297  * Context: !in_interrupt()
 298  *
 299  * Allocates basic resources for this USB host controller, and
 300  * then invokes the start() method for the HCD associated with it
 301  * through the hotplug entry's driver_data.
 302  */
 303 static int usb_hcd_omap_probe (const struct hc_driver *driver,
 304                           struct platform_device *pdev)
 305 {
 306         int retval, irq;
 307         struct usb_hcd *hcd = 0;
 308         struct ohci_hcd *ohci;
 309
 310         if (pdev->num_resources != 2) {
 311                 printk(KERN_ERR "hcd probe: invalid num_resources: %i\n",
 312                        pdev->num_resources);
 313                 return -ENODEV;
 314         }
 315
 316         if (pdev->resource[0].flags != IORESOURCE_MEM
 317                         || pdev->resource[1].flags != IORESOURCE_IRQ) {
 318                 printk(KERN_ERR "hcd probe: invalid resource type\n");
 319                 return -ENODEV;
 320         }
 321
 322         usb_host_ck = clk_get(&pdev->dev, "usb_hhc_ck");
 323         if (IS_ERR(usb_host_ck))
 324                 return PTR_ERR(usb_host_ck);
 325
 326         if (!cpu_is_omap15xx())
 327                 usb_dc_ck = clk_get(&pdev->dev, "usb_dc_ck");
 328         else
 329                 usb_dc_ck = clk_get(&pdev->dev, "lb_ck");
 330
 331         if (IS_ERR(usb_dc_ck)) {
 332                 clk_put(usb_host_ck);
 333                 return PTR_ERR(usb_dc_ck);
 334         }
 335
 336
 337         hcd = usb_create_hcd (driver, &pdev->dev, dev_name(&pdev->dev));
 338         if (!hcd) {
 339                 retval = -ENOMEM;
 340                 goto err0;
 341         }
 342         hcd->rsrc_start = pdev->resource[0].start;
 343         hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1;
 344
 345         if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
 346                 dev_dbg(&pdev->dev, "request_mem_region failed\n");
 347                 retval = -EBUSY;
 348                 goto err1;
 349         }
 350
 351         hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
 352         if (!hcd->regs) {
 353                 dev_err(&pdev->dev, "can't ioremap OHCI HCD\n");
 354                 retval = -ENOMEM;
 355                 goto err2;
 356         }
 357
 358         ohci = hcd_to_ohci(hcd);
 359         ohci_hcd_init(ohci);
 360
 361         host_initialized = 0;
 362         host_enabled = 1;
 363
 364         irq = platform_get_irq(pdev, 0);
 365         if (irq < 0) {
 366                 retval = -ENXIO;
 367                 goto err3;
 368         }
 369         retval = usb_add_hcd(hcd, irq, 0);
 370         if (retval)
 371                 goto err3;
 372
 373         host_initialized = 1;
 374
 375         if (!host_enabled)
 376                 omap_ohci_clock_power(0);
 377
 378         return 0;
 379 err3:
 380         iounmap(hcd->regs);
 381 err2:
 382         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 383 err1:
 384         usb_put_hcd(hcd);
 385 err0:
 386         clk_put(usb_dc_ck);
 387         clk_put(usb_host_ck);
 388         return retval;
 389 }
 390
 391
 392 /* may be called with controller, bus, and devices active */
 393
 394 /**
 395  * usb_hcd_omap_remove - shutdown processing for OMAP-based HCDs
 396  * @dev: USB Host Controller being removed
 397  * Context: !in_interrupt()
 398  *
 399  * Reverses the effect of usb_hcd_omap_probe(), first invoking
 400  * the HCD's stop() method.  It is always called from a thread
 401  * context, normally "rmmod", "apmd", or something similar.
 402  */
 403 static inline void
 404 usb_hcd_omap_remove (struct usb_hcd *hcd, struct platform_device *pdev)
 405 {
 406         usb_remove_hcd(hcd);
 407         if (!IS_ERR_OR_NULL(hcd->phy)) {
 408                 (void) otg_set_host(hcd->phy->otg, 0);
 409                 usb_put_phy(hcd->phy);
 410         }
 411         if (machine_is_omap_osk())
 412                 gpio_free(9);
 413         iounmap(hcd->regs);
 414         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 415         usb_put_hcd(hcd);
 416         clk_put(usb_dc_ck);
 417         clk_put(usb_host_ck);
 418 }
 419
 420 /*-------------------------------------------------------------------------*/
 421
 422 static int
 423 ohci_omap_start (struct usb_hcd *hcd)
 424 {
 425         struct omap_usb_config *config;
 426         struct ohci_hcd *ohci = hcd_to_ohci (hcd);
 427         int             ret;
 428
 429         if (!host_enabled)
 430                 return 0;
 431         config = hcd->self.controller->platform_data;
 432         if (config->otg || config->rwc) {
 433                 ohci->hc_control = OHCI_CTRL_RWC;
 434                 writel(OHCI_CTRL_RWC, &ohci->regs->control);
 435         }
 436
 437         if ((ret = ohci_run (ohci)) < 0) {
 438                 dev_err(hcd->self.controller, "can't start\n");
 439                 ohci_stop (hcd);
 440                 return ret;
 441         }
 442         return 0;
 443 }
 444
 445 /*-------------------------------------------------------------------------*/
 446
 447 static const struct hc_driver ohci_omap_hc_driver = {
 448         .description =          hcd_name,
 449         .product_desc =         "OMAP OHCI",
 450         .hcd_priv_size =        sizeof(struct ohci_hcd),
 451
 452         /*
 453          * generic hardware linkage
 454          */
 455         .irq =                  ohci_irq,
 456         .flags =                HCD_USB11 | HCD_MEMORY,
 457
 458         /*
 459          * basic lifecycle operations
 460          */
 461         .reset =                ohci_omap_init,
 462         .start =                ohci_omap_start,
 463         .stop =                 ohci_omap_stop,
 464         .shutdown =             ohci_shutdown,
 465
 466         /*
 467          * managing i/o requests and associated device resources
 468          */
 469         .urb_enqueue =          ohci_urb_enqueue,
 470         .urb_dequeue =          ohci_urb_dequeue,
 471         .endpoint_disable =     ohci_endpoint_disable,
 472
 473         /*
 474          * scheduling support
 475          */
 476         .get_frame_number =     ohci_get_frame,
 477
 478         /*
 479          * root hub support
 480          */
 481         .hub_status_data =      ohci_hub_status_data,
 482         .hub_control =          ohci_hub_control,
 483 #ifdef  CONFIG_PM
 484         .bus_suspend =          ohci_bus_suspend,
 485         .bus_resume =           ohci_bus_resume,
 486 #endif
 487         .start_port_reset =     ohci_start_port_reset,
 488 };
 489
 490 /*-------------------------------------------------------------------------*/
 491
 492 static int ohci_hcd_omap_drv_probe(struct platform_device *dev)
 493 {
 494         return usb_hcd_omap_probe(&ohci_omap_hc_driver, dev);
 495 }
 496
 497 static int ohci_hcd_omap_drv_remove(struct platform_device *dev)
 498 {
 499         struct usb_hcd          *hcd = platform_get_drvdata(dev);
 500
 501         usb_hcd_omap_remove(hcd, dev);
 502         platform_set_drvdata(dev, NULL);
 503
 504         return 0;
 505 }
 506
 507 /*-------------------------------------------------------------------------*/
 508
 509 #ifdef  CONFIG_PM
 510
 511 static int ohci_omap_suspend(struct platform_device *dev, pm_message_t message)
 512 {
 513         struct ohci_hcd *ohci = hcd_to_ohci(platform_get_drvdata(dev));
 514
 515         if (time_before(jiffies, ohci->next_statechange))
 516                 msleep(5);
 517         ohci->next_statechange = jiffies;
 518
 519         omap_ohci_clock_power(0);
 520         return 0;
 521 }
 522
 523 static int ohci_omap_resume(struct platform_device *dev)
 524 {
 525         struct usb_hcd  *hcd = platform_get_drvdata(dev);
 526         struct ohci_hcd *ohci = hcd_to_ohci(hcd);
 527
 528         if (time_before(jiffies, ohci->next_statechange))
 529                 msleep(5);
 530         ohci->next_statechange = jiffies;
 531
 532         omap_ohci_clock_power(1);
 533         ohci_finish_controller_resume(hcd);
 534         return 0;
 535 }
 536
 537 #endif
 538
 539 /*-------------------------------------------------------------------------*/
 540
 541 /*
 542  * Driver definition to register with the OMAP bus
 543  */
 544 static struct platform_driver ohci_hcd_omap_driver = {
 545         .probe          = ohci_hcd_omap_drv_probe,
 546         .remove         = ohci_hcd_omap_drv_remove,
 547         .shutdown       = usb_hcd_platform_shutdown,
 548 #ifdef  CONFIG_PM
 549         .suspend        = ohci_omap_suspend,
 550         .resume         = ohci_omap_resume,
 551 #endif
 552         .driver         = {
 553                 .owner  = THIS_MODULE,
 554                 .name   = "ohci",
 555         },
 556 };
 557
 558 MODULE_ALIAS("platform:ohci");