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