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 <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 58static inline int tps65010_set_gpio_out_value(unsigned gpio, unsigned value) 59{ 60 return 0; 61} 62 63#endif 64 65extern int usb_disabled(void); 66extern int ocpi_enable(void); 67 68static struct clk *usb_host_ck; 69static struct clk *usb_dc_ck; 70static int host_enabled; 71static int host_initialized; 72 73static 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 */ 90static 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 */ 115static 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 */ 134static 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 168static void start_hnp(struct ohci_hcd *ohci) 169{ 170 const unsigned port = ohci_to_hcd(ohci)->self.otg_port - 1; 171 unsigned long flags; 172 173 otg_start_hnp(ohci->transceiver); 174 175 local_irq_save(flags); 176 ohci->transceiver->state = OTG_STATE_A_SUSPEND; 177 writel (RH_PS_PSS, &ohci->regs->roothub.portstatus [port]); 178 OTG_CTRL_REG &= ~OTG_A_BUSREQ; 179 local_irq_restore(flags); 180} 181 182#endif 183 184/*-------------------------------------------------------------------------*/ 185 186static int ohci_omap_init(struct usb_hcd *hcd) 187{ 188 struct ohci_hcd *ohci = hcd_to_ohci(hcd); 189 struct omap_usb_config *config = hcd->self.controller->platform_data; 190 int need_transceiver = (config->otg != 0); 191 int ret; 192 193 dev_dbg(hcd->self.controller, "starting USB Controller\n"); 194 195 if (config->otg) { 196 ohci_to_hcd(ohci)->self.otg_port = config->otg; 197 /* default/minimum OTG power budget: 8 mA */ 198 ohci_to_hcd(ohci)->power_budget = 8; 199 } 200 201 /* boards can use OTG transceivers in non-OTG modes */ 202 need_transceiver = need_transceiver 203 || machine_is_omap_h2() || machine_is_omap_h3(); 204 205 if (cpu_is_omap16xx()) 206 ocpi_enable(); 207 208#ifdef CONFIG_ARCH_OMAP_OTG 209 if (need_transceiver) { 210 ohci->transceiver = otg_get_transceiver(); 211 if (ohci->transceiver) { 212 int status = otg_set_host(ohci->transceiver, 213 &ohci_to_hcd(ohci)->self); 214 dev_dbg(hcd->self.controller, "init %s transceiver, status %d\n", 215 ohci->transceiver->label, status); 216 if (status) { 217 if (ohci->transceiver) 218 put_device(ohci->transceiver->dev); 219 return status; 220 } 221 } else { 222 dev_err(hcd->self.controller, "can't find transceiver\n"); 223 return -ENODEV; 224 } 225 } 226#endif 227 228 omap_ohci_clock_power(1); 229 230 if (cpu_is_omap1510()) { 231 omap_1510_local_bus_power(1); 232 omap_1510_local_bus_init(); 233 } 234 235 if ((ret = ohci_init(ohci)) < 0) 236 return ret; 237 238 /* board-specific power switching and overcurrent support */ 239 if (machine_is_omap_osk() || machine_is_omap_innovator()) { 240 u32 rh = roothub_a (ohci); 241 242 /* power switching (ganged by default) */ 243 rh &= ~RH_A_NPS; 244 245 /* TPS2045 switch for internal transceiver (port 1) */ 246 if (machine_is_omap_osk()) { 247 ohci_to_hcd(ohci)->power_budget = 250; 248 249 rh &= ~RH_A_NOCP; 250 251 /* gpio9 for overcurrent detction */ 252 omap_cfg_reg(W8_1610_GPIO9); 253 omap_request_gpio(9); 254 omap_set_gpio_direction(9, 1 /* IN */); 255 256 /* for paranoia's sake: disable USB.PUEN */ 257 omap_cfg_reg(W4_USB_HIGHZ); 258 } 259 ohci_writel(ohci, rh, &ohci->regs->roothub.a); 260 distrust_firmware = 0; 261 } else if (machine_is_nokia770()) { 262 /* We require a self-powered hub, which should have 263 * plenty of power. */ 264 ohci_to_hcd(ohci)->power_budget = 0; 265 } 266 267 omap_ohci_transceiver_power(1); 268 269 /* board init will have already handled HMC and mux setup. 270 * any external transceiver should already be initialized 271 * too, so all configured ports use the right signaling now. 272 */ 273 274 return 0; 275} 276 277static void ohci_omap_stop(struct usb_hcd *hcd) 278{ 279 dev_dbg(hcd->self.controller, "stopping USB Controller\n"); 280 omap_ohci_clock_power(0); 281} 282 283 284/*-------------------------------------------------------------------------*/ 285 286/** 287 * usb_hcd_omap_probe - initialize OMAP-based HCDs 288 * Context: !in_interrupt() 289 * 290 * Allocates basic resources for this USB host controller, and 291 * then invokes the start() method for the HCD associated with it 292 * through the hotplug entry's driver_data. 293 */ 294static int usb_hcd_omap_probe (const struct hc_driver *driver, 295 struct platform_device *pdev) 296{ 297 int retval, irq; 298 struct usb_hcd *hcd = 0; 299 struct ohci_hcd *ohci; 300 301 if (pdev->num_resources != 2) { 302 printk(KERN_ERR "hcd probe: invalid num_resources: %i\n", 303 pdev->num_resources); 304 return -ENODEV; 305 } 306 307 if (pdev->resource[0].flags != IORESOURCE_MEM 308 || pdev->resource[1].flags != IORESOURCE_IRQ) { 309 printk(KERN_ERR "hcd probe: invalid resource type\n"); 310 return -ENODEV; 311 } 312 313 usb_host_ck = clk_get(0, "usb_hhc_ck"); 314 if (IS_ERR(usb_host_ck)) 315 return PTR_ERR(usb_host_ck); 316 317 if (!cpu_is_omap1510()) 318 usb_dc_ck = clk_get(0, "usb_dc_ck"); 319 else 320 usb_dc_ck = clk_get(0, "lb_ck"); 321 322 if (IS_ERR(usb_dc_ck)) { 323 clk_put(usb_host_ck); 324 return PTR_ERR(usb_dc_ck); 325 } 326 327 328 hcd = usb_create_hcd (driver, &pdev->dev, pdev->dev.bus_id); 329 if (!hcd) { 330 retval = -ENOMEM; 331 goto err0; 332 } 333 hcd->rsrc_start = pdev->resource[0].start; 334 hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1; 335 336 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { 337 dev_dbg(&pdev->dev, "request_mem_region failed\n"); 338 retval = -EBUSY; 339 goto err1; 340 } 341 342 hcd->regs = (void __iomem *) (int) IO_ADDRESS(hcd->rsrc_start); 343 344 ohci = hcd_to_ohci(hcd); 345 ohci_hcd_init(ohci); 346 347 host_initialized = 0; 348 host_enabled = 1; 349 350 irq = platform_get_irq(pdev, 0); 351 if (irq < 0) { 352 retval = -ENXIO; 353 goto err2; 354 } 355 retval = usb_add_hcd(hcd, irq, IRQF_DISABLED); 356 if (retval) 357 goto err2; 358 359 host_initialized = 1; 360 361 if (!host_enabled) 362 omap_ohci_clock_power(0); 363 364 return 0; 365err2: 366 release_mem_region(hcd->rsrc_start, hcd->rsrc_len); 367err1: 368 usb_put_hcd(hcd); 369err0: 370 clk_put(usb_dc_ck); 371 clk_put(usb_host_ck); 372 return retval; 373} 374 375 376/* may be called with controller, bus, and devices active */ 377 378/** 379 * usb_hcd_omap_remove - shutdown processing for OMAP-based HCDs 380 * @dev: USB Host Controller being removed 381 * Context: !in_interrupt() 382 * 383 * Reverses the effect of usb_hcd_omap_probe(), first invoking 384 * the HCD's stop() method. It is always called from a thread 385 * context, normally "rmmod", "apmd", or something similar. 386 */ 387static inline void 388usb_hcd_omap_remove (struct usb_hcd *hcd, struct platform_device *pdev) 389{ 390 struct ohci_hcd *ohci = hcd_to_ohci (hcd); 391 392 usb_remove_hcd(hcd); 393 if (ohci->transceiver) { 394 (void) otg_set_host(ohci->transceiver, 0); 395 put_device(ohci->transceiver->dev); 396 } 397 if (machine_is_omap_osk()) 398 omap_free_gpio(9); 399 release_mem_region(hcd->rsrc_start, hcd->rsrc_len); 400 usb_put_hcd(hcd); 401 clk_put(usb_dc_ck); 402 clk_put(usb_host_ck); 403} 404 405/*-------------------------------------------------------------------------*/ 406 407static int 408ohci_omap_start (struct usb_hcd *hcd) 409{ 410 struct omap_usb_config *config; 411 struct ohci_hcd *ohci = hcd_to_ohci (hcd); 412 int ret; 413 414 if (!host_enabled) 415 return 0; 416 config = hcd->self.controller->platform_data; 417 if (config->otg || config->rwc) { 418 ohci->hc_control = OHCI_CTRL_RWC; 419 writel(OHCI_CTRL_RWC, &ohci->regs->control); 420 } 421 422 if ((ret = ohci_run (ohci)) < 0) { 423 dev_err(hcd->self.controller, "can't start\n"); 424 ohci_stop (hcd); 425 return ret; 426 } 427 return 0; 428} 429 430/*-------------------------------------------------------------------------*/ 431 432static const struct hc_driver ohci_omap_hc_driver = { 433 .description = hcd_name, 434 .product_desc = "OMAP OHCI", 435 .hcd_priv_size = sizeof(struct ohci_hcd), 436 437 /* 438 * generic hardware linkage 439 */ 440 .irq = ohci_irq, 441 .flags = HCD_USB11 | HCD_MEMORY, 442 443 /* 444 * basic lifecycle operations 445 */ 446 .reset = ohci_omap_init, 447 .start = ohci_omap_start, 448 .stop = ohci_omap_stop, 449 .shutdown = ohci_shutdown, 450 451 /* 452 * managing i/o requests and associated device resources 453 */ 454 .urb_enqueue = ohci_urb_enqueue, 455 .urb_dequeue = ohci_urb_dequeue, 456 .endpoint_disable = ohci_endpoint_disable, 457 458 /* 459 * scheduling support 460 */ 461 .get_frame_number = ohci_get_frame, 462 463 /* 464 * root hub support 465 */ 466 .hub_status_data = ohci_hub_status_data, 467 .hub_control = ohci_hub_control, 468 .hub_irq_enable = ohci_rhsc_enable, 469#ifdef CONFIG_PM 470 .bus_suspend = ohci_bus_suspend, 471 .bus_resume = ohci_bus_resume, 472#endif 473 .start_port_reset = ohci_start_port_reset, 474}; 475 476/*-------------------------------------------------------------------------*/ 477 478static int ohci_hcd_omap_drv_probe(struct platform_device *dev) 479{ 480 return usb_hcd_omap_probe(&ohci_omap_hc_driver, dev); 481} 482 483static int ohci_hcd_omap_drv_remove(struct platform_device *dev) 484{ 485 struct usb_hcd *hcd = platform_get_drvdata(dev); 486 487 usb_hcd_omap_remove(hcd, dev); 488 platform_set_drvdata(dev, NULL); 489 490 return 0; 491} 492 493/*-------------------------------------------------------------------------*/ 494 495#ifdef CONFIG_PM 496 497static int ohci_omap_suspend(struct platform_device *dev, pm_message_t message) 498{ 499 struct ohci_hcd *ohci = hcd_to_ohci(platform_get_drvdata(dev)); 500 501 if (time_before(jiffies, ohci->next_statechange)) 502 msleep(5); 503 ohci->next_statechange = jiffies; 504 505 omap_ohci_clock_power(0); 506 ohci_to_hcd(ohci)->state = HC_STATE_SUSPENDED; 507 dev->dev.power.power_state = PMSG_SUSPEND; 508 return 0; 509} 510 511static int ohci_omap_resume(struct platform_device *dev) 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(1); 520 dev->dev.power.power_state = PMSG_ON; 521 usb_hcd_resume_root_hub(platform_get_drvdata(dev)); 522 return 0; 523} 524 525#endif 526 527/*-------------------------------------------------------------------------*/ 528 529/* 530 * Driver definition to register with the OMAP bus 531 */ 532static struct platform_driver ohci_hcd_omap_driver = { 533 .probe = ohci_hcd_omap_drv_probe, 534 .remove = ohci_hcd_omap_drv_remove, 535 .shutdown = usb_hcd_platform_shutdown, 536#ifdef CONFIG_PM 537 .suspend = ohci_omap_suspend, 538 .resume = ohci_omap_resume, 539#endif 540 .driver = { 541 .owner = THIS_MODULE, 542 .name = "ohci", 543 }, 544}; 545