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> /* IRQF_DISABLED */ 18 #include <linux/jiffies.h> 19 #include <linux/platform_device.h> 20 #include <linux/clk.h> 21 22 #include <mach/hardware.h> 23 #include <asm/io.h> 24 #include <asm/mach-types.h> 25 26 #include <mach/mux.h> 27 #include <mach/irqs.h> 28 #include <mach/gpio.h> 29 #include <mach/fpga.h> 30 #include <mach/usb.h> 31 32 33 /* OMAP-1510 OHCI has its own MMU for DMA */ 34 #define OMAP1510_LB_MEMSIZE 32 /* Should be same as SDRAM size */ 35 #define OMAP1510_LB_CLOCK_DIV 0xfffec10c 36 #define OMAP1510_LB_MMU_CTL 0xfffec208 37 #define OMAP1510_LB_MMU_LCK 0xfffec224 38 #define OMAP1510_LB_MMU_LD_TLB 0xfffec228 39 #define OMAP1510_LB_MMU_CAM_H 0xfffec22c 40 #define OMAP1510_LB_MMU_CAM_L 0xfffec230 41 #define OMAP1510_LB_MMU_RAM_H 0xfffec234 42 #define OMAP1510_LB_MMU_RAM_L 0xfffec238 43 44 45 #ifndef CONFIG_ARCH_OMAP 46 #error "This file is OMAP bus glue. CONFIG_OMAP must be defined." 47 #endif 48 49 #ifdef CONFIG_TPS65010 50 #include <linux/i2c/tps65010.h> 51 #else 52 53 #define LOW 0 54 #define HIGH 1 55 56 #define GPIO1 1 57 58 static inline int tps65010_set_gpio_out_value(unsigned gpio, unsigned value) 59 { 60 return 0; 61 } 62 63 #endif 64 65 extern int usb_disabled(void); 66 extern int ocpi_enable(void); 67 68 static struct clk *usb_host_ck; 69 static struct clk *usb_dc_ck; 70 static int host_enabled; 71 static int host_initialized; 72 73 static void omap_ohci_clock_power(int on) 74 { 75 if (on) { 76 clk_enable(usb_dc_ck); 77 clk_enable(usb_host_ck); 78 /* guesstimate for T5 == 1x 32K clock + APLL lock time */ 79 udelay(100); 80 } else { 81 clk_disable(usb_host_ck); 82 clk_disable(usb_dc_ck); 83 } 84 } 85 86 /* 87 * Board specific gang-switched transceiver power on/off. 88 * NOTE: OSK supplies power from DC, not battery. 89 */ 90 static int omap_ohci_transceiver_power(int on) 91 { 92 if (on) { 93 if (machine_is_omap_innovator() && cpu_is_omap1510()) 94 fpga_write(fpga_read(INNOVATOR_FPGA_CAM_USB_CONTROL) 95 | ((1 << 5/*usb1*/) | (1 << 3/*usb2*/)), 96 INNOVATOR_FPGA_CAM_USB_CONTROL); 97 else if (machine_is_omap_osk()) 98 tps65010_set_gpio_out_value(GPIO1, LOW); 99 } else { 100 if (machine_is_omap_innovator() && cpu_is_omap1510()) 101 fpga_write(fpga_read(INNOVATOR_FPGA_CAM_USB_CONTROL) 102 & ~((1 << 5/*usb1*/) | (1 << 3/*usb2*/)), 103 INNOVATOR_FPGA_CAM_USB_CONTROL); 104 else if (machine_is_omap_osk()) 105 tps65010_set_gpio_out_value(GPIO1, HIGH); 106 } 107 108 return 0; 109 } 110 111 #ifdef CONFIG_ARCH_OMAP15XX 112 /* 113 * OMAP-1510 specific Local Bus clock on/off 114 */ 115 static int omap_1510_local_bus_power(int on) 116 { 117 if (on) { 118 omap_writel((1 << 1) | (1 << 0), OMAP1510_LB_MMU_CTL); 119 udelay(200); 120 } else { 121 omap_writel(0, OMAP1510_LB_MMU_CTL); 122 } 123 124 return 0; 125 } 126 127 /* 128 * OMAP-1510 specific Local Bus initialization 129 * NOTE: This assumes 32MB memory size in OMAP1510LB_MEMSIZE. 130 * See also arch/mach-omap/memory.h for __virt_to_dma() and 131 * __dma_to_virt() which need to match with the physical 132 * Local Bus address below. 133 */ 134 static int omap_1510_local_bus_init(void) 135 { 136 unsigned int tlb; 137 unsigned long lbaddr, physaddr; 138 139 omap_writel((omap_readl(OMAP1510_LB_CLOCK_DIV) & 0xfffffff8) | 0x4, 140 OMAP1510_LB_CLOCK_DIV); 141 142 /* Configure the Local Bus MMU table */ 143 for (tlb = 0; tlb < OMAP1510_LB_MEMSIZE; tlb++) { 144 lbaddr = tlb * 0x00100000 + OMAP1510_LB_OFFSET; 145 physaddr = tlb * 0x00100000 + PHYS_OFFSET; 146 omap_writel((lbaddr & 0x0fffffff) >> 22, OMAP1510_LB_MMU_CAM_H); 147 omap_writel(((lbaddr & 0x003ffc00) >> 6) | 0xc, 148 OMAP1510_LB_MMU_CAM_L); 149 omap_writel(physaddr >> 16, OMAP1510_LB_MMU_RAM_H); 150 omap_writel((physaddr & 0x0000fc00) | 0x300, OMAP1510_LB_MMU_RAM_L); 151 omap_writel(tlb << 4, OMAP1510_LB_MMU_LCK); 152 omap_writel(0x1, OMAP1510_LB_MMU_LD_TLB); 153 } 154 155 /* Enable the walking table */ 156 omap_writel(omap_readl(OMAP1510_LB_MMU_CTL) | (1 << 3), OMAP1510_LB_MMU_CTL); 157 udelay(200); 158 159 return 0; 160 } 161 #else 162 #define omap_1510_local_bus_power(x) {} 163 #define omap_1510_local_bus_init() {} 164 #endif 165 166 #ifdef CONFIG_USB_OTG 167 168 static void start_hnp(struct ohci_hcd *ohci) 169 { 170 const unsigned port = ohci_to_hcd(ohci)->self.otg_port - 1; 171 unsigned long flags; 172 u32 l; 173 174 otg_start_hnp(ohci->transceiver); 175 176 local_irq_save(flags); 177 ohci->transceiver->state = OTG_STATE_A_SUSPEND; 178 writel (RH_PS_PSS, &ohci->regs->roothub.portstatus [port]); 179 l = omap_readl(OTG_CTRL); 180 l &= ~OTG_A_BUSREQ; 181 omap_writel(l, OTG_CTRL); 182 local_irq_restore(flags); 183 } 184 185 #endif 186 187 /*-------------------------------------------------------------------------*/ 188 189 static int ohci_omap_init(struct usb_hcd *hcd) 190 { 191 struct ohci_hcd *ohci = hcd_to_ohci(hcd); 192 struct omap_usb_config *config = hcd->self.controller->platform_data; 193 int need_transceiver = (config->otg != 0); 194 int ret; 195 196 dev_dbg(hcd->self.controller, "starting USB Controller\n"); 197 198 if (config->otg) { 199 ohci_to_hcd(ohci)->self.otg_port = config->otg; 200 /* default/minimum OTG power budget: 8 mA */ 201 ohci_to_hcd(ohci)->power_budget = 8; 202 } 203 204 /* boards can use OTG transceivers in non-OTG modes */ 205 need_transceiver = need_transceiver 206 || machine_is_omap_h2() || machine_is_omap_h3(); 207 208 if (cpu_is_omap16xx()) 209 ocpi_enable(); 210 211 #ifdef CONFIG_USB_OTG 212 if (need_transceiver) { 213 ohci->transceiver = otg_get_transceiver(); 214 if (ohci->transceiver) { 215 int status = otg_set_host(ohci->transceiver, 216 &ohci_to_hcd(ohci)->self); 217 dev_dbg(hcd->self.controller, "init %s transceiver, status %d\n", 218 ohci->transceiver->label, status); 219 if (status) { 220 if (ohci->transceiver) 221 put_device(ohci->transceiver->dev); 222 return status; 223 } 224 } else { 225 dev_err(hcd->self.controller, "can't find transceiver\n"); 226 return -ENODEV; 227 } 228 ohci->start_hnp = start_hnp; 229 } 230 #endif 231 232 omap_ohci_clock_power(1); 233 234 if (cpu_is_omap15xx()) { 235 omap_1510_local_bus_power(1); 236 omap_1510_local_bus_init(); 237 } 238 239 if ((ret = ohci_init(ohci)) < 0) 240 return ret; 241 242 /* board-specific power switching and overcurrent support */ 243 if (machine_is_omap_osk() || machine_is_omap_innovator()) { 244 u32 rh = roothub_a (ohci); 245 246 /* power switching (ganged by default) */ 247 rh &= ~RH_A_NPS; 248 249 /* TPS2045 switch for internal transceiver (port 1) */ 250 if (machine_is_omap_osk()) { 251 ohci_to_hcd(ohci)->power_budget = 250; 252 253 rh &= ~RH_A_NOCP; 254 255 /* gpio9 for overcurrent detction */ 256 omap_cfg_reg(W8_1610_GPIO9); 257 omap_request_gpio(9); 258 omap_set_gpio_direction(9, 1 /* IN */); 259 260 /* for paranoia's sake: disable USB.PUEN */ 261 omap_cfg_reg(W4_USB_HIGHZ); 262 } 263 ohci_writel(ohci, rh, &ohci->regs->roothub.a); 264 ohci->flags &= ~OHCI_QUIRK_HUB_POWER; 265 } else if (machine_is_nokia770()) { 266 /* We require a self-powered hub, which should have 267 * plenty of power. */ 268 ohci_to_hcd(ohci)->power_budget = 0; 269 } 270 271 /* FIXME khubd hub requests should manage power switching */ 272 omap_ohci_transceiver_power(1); 273 274 /* board init will have already handled HMC and mux setup. 275 * any external transceiver should already be initialized 276 * too, so all configured ports use the right signaling now. 277 */ 278 279 return 0; 280 } 281 282 static void ohci_omap_stop(struct usb_hcd *hcd) 283 { 284 dev_dbg(hcd->self.controller, "stopping USB Controller\n"); 285 omap_ohci_clock_power(0); 286 } 287 288 289 /*-------------------------------------------------------------------------*/ 290 291 /** 292 * usb_hcd_omap_probe - initialize OMAP-based HCDs 293 * Context: !in_interrupt() 294 * 295 * Allocates basic resources for this USB host controller, and 296 * then invokes the start() method for the HCD associated with it 297 * through the hotplug entry's driver_data. 298 */ 299 static int usb_hcd_omap_probe (const struct hc_driver *driver, 300 struct platform_device *pdev) 301 { 302 int retval, irq; 303 struct usb_hcd *hcd = 0; 304 struct ohci_hcd *ohci; 305 306 if (pdev->num_resources != 2) { 307 printk(KERN_ERR "hcd probe: invalid num_resources: %i\n", 308 pdev->num_resources); 309 return -ENODEV; 310 } 311 312 if (pdev->resource[0].flags != IORESOURCE_MEM 313 || pdev->resource[1].flags != IORESOURCE_IRQ) { 314 printk(KERN_ERR "hcd probe: invalid resource type\n"); 315 return -ENODEV; 316 } 317 318 usb_host_ck = clk_get(0, "usb_hhc_ck"); 319 if (IS_ERR(usb_host_ck)) 320 return PTR_ERR(usb_host_ck); 321 322 if (!cpu_is_omap15xx()) 323 usb_dc_ck = clk_get(0, "usb_dc_ck"); 324 else 325 usb_dc_ck = clk_get(0, "lb_ck"); 326 327 if (IS_ERR(usb_dc_ck)) { 328 clk_put(usb_host_ck); 329 return PTR_ERR(usb_dc_ck); 330 } 331 332 333 hcd = usb_create_hcd (driver, &pdev->dev, dev_name(&pdev->dev)); 334 if (!hcd) { 335 retval = -ENOMEM; 336 goto err0; 337 } 338 hcd->rsrc_start = pdev->resource[0].start; 339 hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1; 340 341 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { 342 dev_dbg(&pdev->dev, "request_mem_region failed\n"); 343 retval = -EBUSY; 344 goto err1; 345 } 346 347 hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); 348 if (!hcd->regs) { 349 dev_err(&pdev->dev, "can't ioremap OHCI HCD\n"); 350 retval = -ENOMEM; 351 goto err2; 352 } 353 354 ohci = hcd_to_ohci(hcd); 355 ohci_hcd_init(ohci); 356 357 host_initialized = 0; 358 host_enabled = 1; 359 360 irq = platform_get_irq(pdev, 0); 361 if (irq < 0) { 362 retval = -ENXIO; 363 goto err3; 364 } 365 retval = usb_add_hcd(hcd, irq, IRQF_DISABLED); 366 if (retval) 367 goto err3; 368 369 host_initialized = 1; 370 371 if (!host_enabled) 372 omap_ohci_clock_power(0); 373 374 return 0; 375 err3: 376 iounmap(hcd->regs); 377 err2: 378 release_mem_region(hcd->rsrc_start, hcd->rsrc_len); 379 err1: 380 usb_put_hcd(hcd); 381 err0: 382 clk_put(usb_dc_ck); 383 clk_put(usb_host_ck); 384 return retval; 385 } 386 387 388 /* may be called with controller, bus, and devices active */ 389 390 /** 391 * usb_hcd_omap_remove - shutdown processing for OMAP-based HCDs 392 * @dev: USB Host Controller being removed 393 * Context: !in_interrupt() 394 * 395 * Reverses the effect of usb_hcd_omap_probe(), first invoking 396 * the HCD's stop() method. It is always called from a thread 397 * context, normally "rmmod", "apmd", or something similar. 398 */ 399 static inline void 400 usb_hcd_omap_remove (struct usb_hcd *hcd, struct platform_device *pdev) 401 { 402 struct ohci_hcd *ohci = hcd_to_ohci (hcd); 403 404 usb_remove_hcd(hcd); 405 if (ohci->transceiver) { 406 (void) otg_set_host(ohci->transceiver, 0); 407 put_device(ohci->transceiver->dev); 408 } 409 if (machine_is_omap_osk()) 410 omap_free_gpio(9); 411 iounmap(hcd->regs); 412 release_mem_region(hcd->rsrc_start, hcd->rsrc_len); 413 usb_put_hcd(hcd); 414 clk_put(usb_dc_ck); 415 clk_put(usb_host_ck); 416 } 417 418 /*-------------------------------------------------------------------------*/ 419 420 static int 421 ohci_omap_start (struct usb_hcd *hcd) 422 { 423 struct omap_usb_config *config; 424 struct ohci_hcd *ohci = hcd_to_ohci (hcd); 425 int ret; 426 427 if (!host_enabled) 428 return 0; 429 config = hcd->self.controller->platform_data; 430 if (config->otg || config->rwc) { 431 ohci->hc_control = OHCI_CTRL_RWC; 432 writel(OHCI_CTRL_RWC, &ohci->regs->control); 433 } 434 435 if ((ret = ohci_run (ohci)) < 0) { 436 dev_err(hcd->self.controller, "can't start\n"); 437 ohci_stop (hcd); 438 return ret; 439 } 440 return 0; 441 } 442 443 /*-------------------------------------------------------------------------*/ 444 445 static const struct hc_driver ohci_omap_hc_driver = { 446 .description = hcd_name, 447 .product_desc = "OMAP OHCI", 448 .hcd_priv_size = sizeof(struct ohci_hcd), 449 450 /* 451 * generic hardware linkage 452 */ 453 .irq = ohci_irq, 454 .flags = HCD_USB11 | HCD_MEMORY, 455 456 /* 457 * basic lifecycle operations 458 */ 459 .reset = ohci_omap_init, 460 .start = ohci_omap_start, 461 .stop = ohci_omap_stop, 462 .shutdown = ohci_shutdown, 463 464 /* 465 * managing i/o requests and associated device resources 466 */ 467 .urb_enqueue = ohci_urb_enqueue, 468 .urb_dequeue = ohci_urb_dequeue, 469 .endpoint_disable = ohci_endpoint_disable, 470 471 /* 472 * scheduling support 473 */ 474 .get_frame_number = ohci_get_frame, 475 476 /* 477 * root hub support 478 */ 479 .hub_status_data = ohci_hub_status_data, 480 .hub_control = ohci_hub_control, 481 #ifdef CONFIG_PM 482 .bus_suspend = ohci_bus_suspend, 483 .bus_resume = ohci_bus_resume, 484 #endif 485 .start_port_reset = ohci_start_port_reset, 486 }; 487 488 /*-------------------------------------------------------------------------*/ 489 490 static int ohci_hcd_omap_drv_probe(struct platform_device *dev) 491 { 492 return usb_hcd_omap_probe(&ohci_omap_hc_driver, dev); 493 } 494 495 static int ohci_hcd_omap_drv_remove(struct platform_device *dev) 496 { 497 struct usb_hcd *hcd = platform_get_drvdata(dev); 498 499 usb_hcd_omap_remove(hcd, dev); 500 platform_set_drvdata(dev, NULL); 501 502 return 0; 503 } 504 505 /*-------------------------------------------------------------------------*/ 506 507 #ifdef CONFIG_PM 508 509 static int ohci_omap_suspend(struct platform_device *dev, pm_message_t message) 510 { 511 struct ohci_hcd *ohci = hcd_to_ohci(platform_get_drvdata(dev)); 512 513 if (time_before(jiffies, ohci->next_statechange)) 514 msleep(5); 515 ohci->next_statechange = jiffies; 516 517 omap_ohci_clock_power(0); 518 ohci_to_hcd(ohci)->state = HC_STATE_SUSPENDED; 519 return 0; 520 } 521 522 static int ohci_omap_resume(struct platform_device *dev) 523 { 524 struct usb_hcd *hcd = platform_get_drvdata(dev); 525 struct ohci_hcd *ohci = hcd_to_ohci(hcd); 526 527 if (time_before(jiffies, ohci->next_statechange)) 528 msleep(5); 529 ohci->next_statechange = jiffies; 530 531 omap_ohci_clock_power(1); 532 ohci_finish_controller_resume(hcd); 533 return 0; 534 } 535 536 #endif 537 538 /*-------------------------------------------------------------------------*/ 539 540 /* 541 * Driver definition to register with the OMAP bus 542 */ 543 static struct platform_driver ohci_hcd_omap_driver = { 544 .probe = ohci_hcd_omap_drv_probe, 545 .remove = ohci_hcd_omap_drv_remove, 546 .shutdown = usb_hcd_platform_shutdown, 547 #ifdef CONFIG_PM 548 .suspend = ohci_omap_suspend, 549 .resume = ohci_omap_resume, 550 #endif 551 .driver = { 552 .owner = THIS_MODULE, 553 .name = "ohci", 554 }, 555 }; 556 557 MODULE_ALIAS("platform:ohci"); 558