1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * omap-usb-host.c - The USBHS core driver for OMAP EHCI & OHCI 4 * 5 * Copyright (C) 2011-2013 Texas Instruments Incorporated - https://www.ti.com 6 * Author: Keshava Munegowda <keshava_mgowda@ti.com> 7 * Author: Roger Quadros <rogerq@ti.com> 8 */ 9 #include <linux/kernel.h> 10 #include <linux/module.h> 11 #include <linux/types.h> 12 #include <linux/slab.h> 13 #include <linux/delay.h> 14 #include <linux/clk.h> 15 #include <linux/dma-mapping.h> 16 #include <linux/gpio.h> 17 #include <linux/platform_device.h> 18 #include <linux/platform_data/usb-omap.h> 19 #include <linux/pm_runtime.h> 20 #include <linux/of.h> 21 #include <linux/of_platform.h> 22 #include <linux/err.h> 23 24 #include "omap-usb.h" 25 26 #define USBHS_DRIVER_NAME "usbhs_omap" 27 #define OMAP_EHCI_DEVICE "ehci-omap" 28 #define OMAP_OHCI_DEVICE "ohci-omap3" 29 30 /* OMAP USBHOST Register addresses */ 31 32 /* UHH Register Set */ 33 #define OMAP_UHH_REVISION (0x00) 34 #define OMAP_UHH_SYSCONFIG (0x10) 35 #define OMAP_UHH_SYSCONFIG_MIDLEMODE (1 << 12) 36 #define OMAP_UHH_SYSCONFIG_CACTIVITY (1 << 8) 37 #define OMAP_UHH_SYSCONFIG_SIDLEMODE (1 << 3) 38 #define OMAP_UHH_SYSCONFIG_ENAWAKEUP (1 << 2) 39 #define OMAP_UHH_SYSCONFIG_SOFTRESET (1 << 1) 40 #define OMAP_UHH_SYSCONFIG_AUTOIDLE (1 << 0) 41 42 #define OMAP_UHH_SYSSTATUS (0x14) 43 #define OMAP_UHH_HOSTCONFIG (0x40) 44 #define OMAP_UHH_HOSTCONFIG_ULPI_BYPASS (1 << 0) 45 #define OMAP_UHH_HOSTCONFIG_ULPI_P1_BYPASS (1 << 0) 46 #define OMAP_UHH_HOSTCONFIG_ULPI_P2_BYPASS (1 << 11) 47 #define OMAP_UHH_HOSTCONFIG_ULPI_P3_BYPASS (1 << 12) 48 #define OMAP_UHH_HOSTCONFIG_INCR4_BURST_EN (1 << 2) 49 #define OMAP_UHH_HOSTCONFIG_INCR8_BURST_EN (1 << 3) 50 #define OMAP_UHH_HOSTCONFIG_INCR16_BURST_EN (1 << 4) 51 #define OMAP_UHH_HOSTCONFIG_INCRX_ALIGN_EN (1 << 5) 52 #define OMAP_UHH_HOSTCONFIG_P1_CONNECT_STATUS (1 << 8) 53 #define OMAP_UHH_HOSTCONFIG_P2_CONNECT_STATUS (1 << 9) 54 #define OMAP_UHH_HOSTCONFIG_P3_CONNECT_STATUS (1 << 10) 55 #define OMAP4_UHH_HOSTCONFIG_APP_START_CLK (1 << 31) 56 57 /* OMAP4-specific defines */ 58 #define OMAP4_UHH_SYSCONFIG_IDLEMODE_CLEAR (3 << 2) 59 #define OMAP4_UHH_SYSCONFIG_NOIDLE (1 << 2) 60 #define OMAP4_UHH_SYSCONFIG_STDBYMODE_CLEAR (3 << 4) 61 #define OMAP4_UHH_SYSCONFIG_NOSTDBY (1 << 4) 62 #define OMAP4_UHH_SYSCONFIG_SOFTRESET (1 << 0) 63 64 #define OMAP4_P1_MODE_CLEAR (3 << 16) 65 #define OMAP4_P1_MODE_TLL (1 << 16) 66 #define OMAP4_P1_MODE_HSIC (3 << 16) 67 #define OMAP4_P2_MODE_CLEAR (3 << 18) 68 #define OMAP4_P2_MODE_TLL (1 << 18) 69 #define OMAP4_P2_MODE_HSIC (3 << 18) 70 71 #define OMAP_UHH_DEBUG_CSR (0x44) 72 73 /* Values of UHH_REVISION - Note: these are not given in the TRM */ 74 #define OMAP_USBHS_REV1 0x00000010 /* OMAP3 */ 75 #define OMAP_USBHS_REV2 0x50700100 /* OMAP4 */ 76 77 #define is_omap_usbhs_rev1(x) (x->usbhs_rev == OMAP_USBHS_REV1) 78 #define is_omap_usbhs_rev2(x) (x->usbhs_rev == OMAP_USBHS_REV2) 79 80 #define is_ehci_phy_mode(x) (x == OMAP_EHCI_PORT_MODE_PHY) 81 #define is_ehci_tll_mode(x) (x == OMAP_EHCI_PORT_MODE_TLL) 82 #define is_ehci_hsic_mode(x) (x == OMAP_EHCI_PORT_MODE_HSIC) 83 84 85 struct usbhs_hcd_omap { 86 int nports; 87 struct clk **utmi_clk; 88 struct clk **hsic60m_clk; 89 struct clk **hsic480m_clk; 90 91 struct clk *xclk60mhsp1_ck; 92 struct clk *xclk60mhsp2_ck; 93 struct clk *utmi_p1_gfclk; 94 struct clk *utmi_p2_gfclk; 95 struct clk *init_60m_fclk; 96 struct clk *ehci_logic_fck; 97 98 void __iomem *uhh_base; 99 100 struct usbhs_omap_platform_data *pdata; 101 102 u32 usbhs_rev; 103 }; 104 /*-------------------------------------------------------------------------*/ 105 106 static const char usbhs_driver_name[] = USBHS_DRIVER_NAME; 107 static u64 usbhs_dmamask = DMA_BIT_MASK(32); 108 109 /*-------------------------------------------------------------------------*/ 110 111 static inline void usbhs_write(void __iomem *base, u32 reg, u32 val) 112 { 113 writel_relaxed(val, base + reg); 114 } 115 116 static inline u32 usbhs_read(void __iomem *base, u32 reg) 117 { 118 return readl_relaxed(base + reg); 119 } 120 121 /*-------------------------------------------------------------------------*/ 122 123 /* 124 * Map 'enum usbhs_omap_port_mode' found in <linux/platform_data/usb-omap.h> 125 * to the device tree binding portN-mode found in 126 * 'Documentation/devicetree/bindings/mfd/omap-usb-host.txt' 127 */ 128 static const char * const port_modes[] = { 129 [OMAP_USBHS_PORT_MODE_UNUSED] = "", 130 [OMAP_EHCI_PORT_MODE_PHY] = "ehci-phy", 131 [OMAP_EHCI_PORT_MODE_TLL] = "ehci-tll", 132 [OMAP_EHCI_PORT_MODE_HSIC] = "ehci-hsic", 133 [OMAP_OHCI_PORT_MODE_PHY_6PIN_DATSE0] = "ohci-phy-6pin-datse0", 134 [OMAP_OHCI_PORT_MODE_PHY_6PIN_DPDM] = "ohci-phy-6pin-dpdm", 135 [OMAP_OHCI_PORT_MODE_PHY_3PIN_DATSE0] = "ohci-phy-3pin-datse0", 136 [OMAP_OHCI_PORT_MODE_PHY_4PIN_DPDM] = "ohci-phy-4pin-dpdm", 137 [OMAP_OHCI_PORT_MODE_TLL_6PIN_DATSE0] = "ohci-tll-6pin-datse0", 138 [OMAP_OHCI_PORT_MODE_TLL_6PIN_DPDM] = "ohci-tll-6pin-dpdm", 139 [OMAP_OHCI_PORT_MODE_TLL_3PIN_DATSE0] = "ohci-tll-3pin-datse0", 140 [OMAP_OHCI_PORT_MODE_TLL_4PIN_DPDM] = "ohci-tll-4pin-dpdm", 141 [OMAP_OHCI_PORT_MODE_TLL_2PIN_DATSE0] = "ohci-tll-2pin-datse0", 142 [OMAP_OHCI_PORT_MODE_TLL_2PIN_DPDM] = "ohci-tll-2pin-dpdm", 143 }; 144 145 static struct platform_device *omap_usbhs_alloc_child(const char *name, 146 struct resource *res, int num_resources, void *pdata, 147 size_t pdata_size, struct device *dev) 148 { 149 struct platform_device *child; 150 int ret; 151 152 child = platform_device_alloc(name, 0); 153 154 if (!child) { 155 dev_err(dev, "platform_device_alloc %s failed\n", name); 156 goto err_end; 157 } 158 159 ret = platform_device_add_resources(child, res, num_resources); 160 if (ret) { 161 dev_err(dev, "platform_device_add_resources failed\n"); 162 goto err_alloc; 163 } 164 165 ret = platform_device_add_data(child, pdata, pdata_size); 166 if (ret) { 167 dev_err(dev, "platform_device_add_data failed\n"); 168 goto err_alloc; 169 } 170 171 child->dev.dma_mask = &usbhs_dmamask; 172 dma_set_coherent_mask(&child->dev, DMA_BIT_MASK(32)); 173 child->dev.parent = dev; 174 175 ret = platform_device_add(child); 176 if (ret) { 177 dev_err(dev, "platform_device_add failed\n"); 178 goto err_alloc; 179 } 180 181 return child; 182 183 err_alloc: 184 platform_device_put(child); 185 186 err_end: 187 return NULL; 188 } 189 190 static int omap_usbhs_alloc_children(struct platform_device *pdev) 191 { 192 struct device *dev = &pdev->dev; 193 struct usbhs_omap_platform_data *pdata = dev_get_platdata(dev); 194 struct platform_device *ehci; 195 struct platform_device *ohci; 196 struct resource *res; 197 struct resource resources[2]; 198 int ret; 199 200 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ehci"); 201 if (!res) { 202 dev_err(dev, "EHCI get resource IORESOURCE_MEM failed\n"); 203 ret = -ENODEV; 204 goto err_end; 205 } 206 resources[0] = *res; 207 208 res = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "ehci-irq"); 209 if (!res) { 210 dev_err(dev, " EHCI get resource IORESOURCE_IRQ failed\n"); 211 ret = -ENODEV; 212 goto err_end; 213 } 214 resources[1] = *res; 215 216 ehci = omap_usbhs_alloc_child(OMAP_EHCI_DEVICE, resources, 2, pdata, 217 sizeof(*pdata), dev); 218 219 if (!ehci) { 220 dev_err(dev, "omap_usbhs_alloc_child failed\n"); 221 ret = -ENOMEM; 222 goto err_end; 223 } 224 225 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ohci"); 226 if (!res) { 227 dev_err(dev, "OHCI get resource IORESOURCE_MEM failed\n"); 228 ret = -ENODEV; 229 goto err_ehci; 230 } 231 resources[0] = *res; 232 233 res = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "ohci-irq"); 234 if (!res) { 235 dev_err(dev, "OHCI get resource IORESOURCE_IRQ failed\n"); 236 ret = -ENODEV; 237 goto err_ehci; 238 } 239 resources[1] = *res; 240 241 ohci = omap_usbhs_alloc_child(OMAP_OHCI_DEVICE, resources, 2, pdata, 242 sizeof(*pdata), dev); 243 if (!ohci) { 244 dev_err(dev, "omap_usbhs_alloc_child failed\n"); 245 ret = -ENOMEM; 246 goto err_ehci; 247 } 248 249 return 0; 250 251 err_ehci: 252 platform_device_unregister(ehci); 253 254 err_end: 255 return ret; 256 } 257 258 static bool is_ohci_port(enum usbhs_omap_port_mode pmode) 259 { 260 switch (pmode) { 261 case OMAP_OHCI_PORT_MODE_PHY_6PIN_DATSE0: 262 case OMAP_OHCI_PORT_MODE_PHY_6PIN_DPDM: 263 case OMAP_OHCI_PORT_MODE_PHY_3PIN_DATSE0: 264 case OMAP_OHCI_PORT_MODE_PHY_4PIN_DPDM: 265 case OMAP_OHCI_PORT_MODE_TLL_6PIN_DATSE0: 266 case OMAP_OHCI_PORT_MODE_TLL_6PIN_DPDM: 267 case OMAP_OHCI_PORT_MODE_TLL_3PIN_DATSE0: 268 case OMAP_OHCI_PORT_MODE_TLL_4PIN_DPDM: 269 case OMAP_OHCI_PORT_MODE_TLL_2PIN_DATSE0: 270 case OMAP_OHCI_PORT_MODE_TLL_2PIN_DPDM: 271 return true; 272 273 default: 274 return false; 275 } 276 } 277 278 static int usbhs_runtime_resume(struct device *dev) 279 { 280 struct usbhs_hcd_omap *omap = dev_get_drvdata(dev); 281 struct usbhs_omap_platform_data *pdata = omap->pdata; 282 int i, r; 283 284 dev_dbg(dev, "usbhs_runtime_resume\n"); 285 286 omap_tll_enable(pdata); 287 288 if (!IS_ERR(omap->ehci_logic_fck)) 289 clk_prepare_enable(omap->ehci_logic_fck); 290 291 for (i = 0; i < omap->nports; i++) { 292 switch (pdata->port_mode[i]) { 293 case OMAP_EHCI_PORT_MODE_HSIC: 294 if (!IS_ERR(omap->hsic60m_clk[i])) { 295 r = clk_prepare_enable(omap->hsic60m_clk[i]); 296 if (r) { 297 dev_err(dev, 298 "Can't enable port %d hsic60m clk:%d\n", 299 i, r); 300 } 301 } 302 303 if (!IS_ERR(omap->hsic480m_clk[i])) { 304 r = clk_prepare_enable(omap->hsic480m_clk[i]); 305 if (r) { 306 dev_err(dev, 307 "Can't enable port %d hsic480m clk:%d\n", 308 i, r); 309 } 310 } 311 fallthrough; /* as HSIC mode needs utmi_clk */ 312 313 case OMAP_EHCI_PORT_MODE_TLL: 314 if (!IS_ERR(omap->utmi_clk[i])) { 315 r = clk_prepare_enable(omap->utmi_clk[i]); 316 if (r) { 317 dev_err(dev, 318 "Can't enable port %d clk : %d\n", 319 i, r); 320 } 321 } 322 break; 323 default: 324 break; 325 } 326 } 327 328 return 0; 329 } 330 331 static int usbhs_runtime_suspend(struct device *dev) 332 { 333 struct usbhs_hcd_omap *omap = dev_get_drvdata(dev); 334 struct usbhs_omap_platform_data *pdata = omap->pdata; 335 int i; 336 337 dev_dbg(dev, "usbhs_runtime_suspend\n"); 338 339 for (i = 0; i < omap->nports; i++) { 340 switch (pdata->port_mode[i]) { 341 case OMAP_EHCI_PORT_MODE_HSIC: 342 if (!IS_ERR(omap->hsic60m_clk[i])) 343 clk_disable_unprepare(omap->hsic60m_clk[i]); 344 345 if (!IS_ERR(omap->hsic480m_clk[i])) 346 clk_disable_unprepare(omap->hsic480m_clk[i]); 347 fallthrough; /* as utmi_clks were used in HSIC mode */ 348 349 case OMAP_EHCI_PORT_MODE_TLL: 350 if (!IS_ERR(omap->utmi_clk[i])) 351 clk_disable_unprepare(omap->utmi_clk[i]); 352 break; 353 default: 354 break; 355 } 356 } 357 358 if (!IS_ERR(omap->ehci_logic_fck)) 359 clk_disable_unprepare(omap->ehci_logic_fck); 360 361 omap_tll_disable(pdata); 362 363 return 0; 364 } 365 366 static unsigned omap_usbhs_rev1_hostconfig(struct usbhs_hcd_omap *omap, 367 unsigned reg) 368 { 369 struct usbhs_omap_platform_data *pdata = omap->pdata; 370 int i; 371 372 for (i = 0; i < omap->nports; i++) { 373 switch (pdata->port_mode[i]) { 374 case OMAP_USBHS_PORT_MODE_UNUSED: 375 reg &= ~(OMAP_UHH_HOSTCONFIG_P1_CONNECT_STATUS << i); 376 break; 377 case OMAP_EHCI_PORT_MODE_PHY: 378 if (pdata->single_ulpi_bypass) 379 break; 380 381 if (i == 0) 382 reg &= ~OMAP_UHH_HOSTCONFIG_ULPI_P1_BYPASS; 383 else 384 reg &= ~(OMAP_UHH_HOSTCONFIG_ULPI_P2_BYPASS 385 << (i-1)); 386 break; 387 default: 388 if (pdata->single_ulpi_bypass) 389 break; 390 391 if (i == 0) 392 reg |= OMAP_UHH_HOSTCONFIG_ULPI_P1_BYPASS; 393 else 394 reg |= OMAP_UHH_HOSTCONFIG_ULPI_P2_BYPASS 395 << (i-1); 396 break; 397 } 398 } 399 400 if (pdata->single_ulpi_bypass) { 401 /* bypass ULPI only if none of the ports use PHY mode */ 402 reg |= OMAP_UHH_HOSTCONFIG_ULPI_BYPASS; 403 404 for (i = 0; i < omap->nports; i++) { 405 if (is_ehci_phy_mode(pdata->port_mode[i])) { 406 reg &= ~OMAP_UHH_HOSTCONFIG_ULPI_BYPASS; 407 break; 408 } 409 } 410 } 411 412 return reg; 413 } 414 415 static unsigned omap_usbhs_rev2_hostconfig(struct usbhs_hcd_omap *omap, 416 unsigned reg) 417 { 418 struct usbhs_omap_platform_data *pdata = omap->pdata; 419 int i; 420 421 for (i = 0; i < omap->nports; i++) { 422 /* Clear port mode fields for PHY mode */ 423 reg &= ~(OMAP4_P1_MODE_CLEAR << 2 * i); 424 425 if (is_ehci_tll_mode(pdata->port_mode[i]) || 426 (is_ohci_port(pdata->port_mode[i]))) 427 reg |= OMAP4_P1_MODE_TLL << 2 * i; 428 else if (is_ehci_hsic_mode(pdata->port_mode[i])) 429 reg |= OMAP4_P1_MODE_HSIC << 2 * i; 430 } 431 432 return reg; 433 } 434 435 static void omap_usbhs_init(struct device *dev) 436 { 437 struct usbhs_hcd_omap *omap = dev_get_drvdata(dev); 438 unsigned reg; 439 440 dev_dbg(dev, "starting TI HSUSB Controller\n"); 441 442 pm_runtime_get_sync(dev); 443 444 reg = usbhs_read(omap->uhh_base, OMAP_UHH_HOSTCONFIG); 445 /* setup ULPI bypass and burst configurations */ 446 reg |= (OMAP_UHH_HOSTCONFIG_INCR4_BURST_EN 447 | OMAP_UHH_HOSTCONFIG_INCR8_BURST_EN 448 | OMAP_UHH_HOSTCONFIG_INCR16_BURST_EN); 449 reg |= OMAP4_UHH_HOSTCONFIG_APP_START_CLK; 450 reg &= ~OMAP_UHH_HOSTCONFIG_INCRX_ALIGN_EN; 451 452 switch (omap->usbhs_rev) { 453 case OMAP_USBHS_REV1: 454 reg = omap_usbhs_rev1_hostconfig(omap, reg); 455 break; 456 457 case OMAP_USBHS_REV2: 458 reg = omap_usbhs_rev2_hostconfig(omap, reg); 459 break; 460 461 default: /* newer revisions */ 462 reg = omap_usbhs_rev2_hostconfig(omap, reg); 463 break; 464 } 465 466 usbhs_write(omap->uhh_base, OMAP_UHH_HOSTCONFIG, reg); 467 dev_dbg(dev, "UHH setup done, uhh_hostconfig=%x\n", reg); 468 469 pm_runtime_put_sync(dev); 470 } 471 472 static int usbhs_omap_get_dt_pdata(struct device *dev, 473 struct usbhs_omap_platform_data *pdata) 474 { 475 int ret, i; 476 struct device_node *node = dev->of_node; 477 478 ret = of_property_read_u32(node, "num-ports", &pdata->nports); 479 if (ret) 480 pdata->nports = 0; 481 482 if (pdata->nports > OMAP3_HS_USB_PORTS) { 483 dev_warn(dev, "Too many num_ports <%d> in device tree. Max %d\n", 484 pdata->nports, OMAP3_HS_USB_PORTS); 485 return -ENODEV; 486 } 487 488 /* get port modes */ 489 for (i = 0; i < OMAP3_HS_USB_PORTS; i++) { 490 char prop[11]; 491 const char *mode; 492 493 pdata->port_mode[i] = OMAP_USBHS_PORT_MODE_UNUSED; 494 495 snprintf(prop, sizeof(prop), "port%d-mode", i + 1); 496 ret = of_property_read_string(node, prop, &mode); 497 if (ret < 0) 498 continue; 499 500 /* get 'enum usbhs_omap_port_mode' from port mode string */ 501 ret = match_string(port_modes, ARRAY_SIZE(port_modes), mode); 502 if (ret < 0) { 503 dev_warn(dev, "Invalid port%d-mode \"%s\" in device tree\n", 504 i, mode); 505 return -ENODEV; 506 } 507 508 dev_dbg(dev, "port%d-mode: %s -> %d\n", i, mode, ret); 509 pdata->port_mode[i] = ret; 510 } 511 512 /* get flags */ 513 pdata->single_ulpi_bypass = of_property_read_bool(node, 514 "single-ulpi-bypass"); 515 516 return 0; 517 } 518 519 static const struct of_device_id usbhs_child_match_table[] = { 520 { .compatible = "ti,ehci-omap", }, 521 { .compatible = "ti,ohci-omap3", }, 522 { } 523 }; 524 525 /** 526 * usbhs_omap_probe - initialize TI-based HCDs 527 * 528 * Allocates basic resources for this USB host controller. 529 * 530 * @pdev: Pointer to this device's platform device structure 531 */ 532 static int usbhs_omap_probe(struct platform_device *pdev) 533 { 534 struct device *dev = &pdev->dev; 535 struct usbhs_omap_platform_data *pdata = dev_get_platdata(dev); 536 struct usbhs_hcd_omap *omap; 537 struct resource *res; 538 int ret = 0; 539 int i; 540 bool need_logic_fck; 541 542 if (dev->of_node) { 543 /* For DT boot we populate platform data from OF node */ 544 pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); 545 if (!pdata) 546 return -ENOMEM; 547 548 ret = usbhs_omap_get_dt_pdata(dev, pdata); 549 if (ret) 550 return ret; 551 552 dev->platform_data = pdata; 553 } 554 555 if (!pdata) { 556 dev_err(dev, "Missing platform data\n"); 557 return -ENODEV; 558 } 559 560 if (pdata->nports > OMAP3_HS_USB_PORTS) { 561 dev_info(dev, "Too many num_ports <%d> in platform_data. Max %d\n", 562 pdata->nports, OMAP3_HS_USB_PORTS); 563 return -ENODEV; 564 } 565 566 omap = devm_kzalloc(dev, sizeof(*omap), GFP_KERNEL); 567 if (!omap) { 568 dev_err(dev, "Memory allocation failed\n"); 569 return -ENOMEM; 570 } 571 572 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 573 omap->uhh_base = devm_ioremap_resource(dev, res); 574 if (IS_ERR(omap->uhh_base)) 575 return PTR_ERR(omap->uhh_base); 576 577 omap->pdata = pdata; 578 579 /* Initialize the TLL subsystem */ 580 omap_tll_init(pdata); 581 582 pm_runtime_enable(dev); 583 584 platform_set_drvdata(pdev, omap); 585 pm_runtime_get_sync(dev); 586 587 omap->usbhs_rev = usbhs_read(omap->uhh_base, OMAP_UHH_REVISION); 588 589 /* we need to call runtime suspend before we update omap->nports 590 * to prevent unbalanced clk_disable() 591 */ 592 pm_runtime_put_sync(dev); 593 594 /* 595 * If platform data contains nports then use that 596 * else make out number of ports from USBHS revision 597 */ 598 if (pdata->nports) { 599 omap->nports = pdata->nports; 600 } else { 601 switch (omap->usbhs_rev) { 602 case OMAP_USBHS_REV1: 603 omap->nports = 3; 604 break; 605 case OMAP_USBHS_REV2: 606 omap->nports = 2; 607 break; 608 default: 609 omap->nports = OMAP3_HS_USB_PORTS; 610 dev_dbg(dev, 611 "USB HOST Rev:0x%x not recognized, assuming %d ports\n", 612 omap->usbhs_rev, omap->nports); 613 break; 614 } 615 pdata->nports = omap->nports; 616 } 617 618 i = sizeof(struct clk *) * omap->nports; 619 omap->utmi_clk = devm_kzalloc(dev, i, GFP_KERNEL); 620 omap->hsic480m_clk = devm_kzalloc(dev, i, GFP_KERNEL); 621 omap->hsic60m_clk = devm_kzalloc(dev, i, GFP_KERNEL); 622 623 if (!omap->utmi_clk || !omap->hsic480m_clk || !omap->hsic60m_clk) { 624 dev_err(dev, "Memory allocation failed\n"); 625 ret = -ENOMEM; 626 goto err_mem; 627 } 628 629 /* Set all clocks as invalid to begin with */ 630 omap->ehci_logic_fck = ERR_PTR(-ENODEV); 631 omap->init_60m_fclk = ERR_PTR(-ENODEV); 632 omap->utmi_p1_gfclk = ERR_PTR(-ENODEV); 633 omap->utmi_p2_gfclk = ERR_PTR(-ENODEV); 634 omap->xclk60mhsp1_ck = ERR_PTR(-ENODEV); 635 omap->xclk60mhsp2_ck = ERR_PTR(-ENODEV); 636 637 for (i = 0; i < omap->nports; i++) { 638 omap->utmi_clk[i] = ERR_PTR(-ENODEV); 639 omap->hsic480m_clk[i] = ERR_PTR(-ENODEV); 640 omap->hsic60m_clk[i] = ERR_PTR(-ENODEV); 641 } 642 643 /* for OMAP3 i.e. USBHS REV1 */ 644 if (omap->usbhs_rev == OMAP_USBHS_REV1) { 645 need_logic_fck = false; 646 for (i = 0; i < omap->nports; i++) { 647 if (is_ehci_phy_mode(pdata->port_mode[i]) || 648 is_ehci_tll_mode(pdata->port_mode[i]) || 649 is_ehci_hsic_mode(pdata->port_mode[i])) 650 651 need_logic_fck |= true; 652 } 653 654 if (need_logic_fck) { 655 omap->ehci_logic_fck = devm_clk_get(dev, 656 "usbhost_120m_fck"); 657 if (IS_ERR(omap->ehci_logic_fck)) { 658 ret = PTR_ERR(omap->ehci_logic_fck); 659 dev_err(dev, "usbhost_120m_fck failed:%d\n", 660 ret); 661 goto err_mem; 662 } 663 } 664 goto initialize; 665 } 666 667 /* for OMAP4+ i.e. USBHS REV2+ */ 668 omap->utmi_p1_gfclk = devm_clk_get(dev, "utmi_p1_gfclk"); 669 if (IS_ERR(omap->utmi_p1_gfclk)) { 670 ret = PTR_ERR(omap->utmi_p1_gfclk); 671 dev_err(dev, "utmi_p1_gfclk failed error:%d\n", ret); 672 goto err_mem; 673 } 674 675 omap->utmi_p2_gfclk = devm_clk_get(dev, "utmi_p2_gfclk"); 676 if (IS_ERR(omap->utmi_p2_gfclk)) { 677 ret = PTR_ERR(omap->utmi_p2_gfclk); 678 dev_err(dev, "utmi_p2_gfclk failed error:%d\n", ret); 679 goto err_mem; 680 } 681 682 omap->xclk60mhsp1_ck = devm_clk_get(dev, "refclk_60m_ext_p1"); 683 if (IS_ERR(omap->xclk60mhsp1_ck)) { 684 ret = PTR_ERR(omap->xclk60mhsp1_ck); 685 dev_err(dev, "refclk_60m_ext_p1 failed error:%d\n", ret); 686 goto err_mem; 687 } 688 689 omap->xclk60mhsp2_ck = devm_clk_get(dev, "refclk_60m_ext_p2"); 690 if (IS_ERR(omap->xclk60mhsp2_ck)) { 691 ret = PTR_ERR(omap->xclk60mhsp2_ck); 692 dev_err(dev, "refclk_60m_ext_p2 failed error:%d\n", ret); 693 goto err_mem; 694 } 695 696 omap->init_60m_fclk = devm_clk_get(dev, "refclk_60m_int"); 697 if (IS_ERR(omap->init_60m_fclk)) { 698 ret = PTR_ERR(omap->init_60m_fclk); 699 dev_err(dev, "refclk_60m_int failed error:%d\n", ret); 700 goto err_mem; 701 } 702 703 for (i = 0; i < omap->nports; i++) { 704 char clkname[30]; 705 706 /* clock names are indexed from 1*/ 707 snprintf(clkname, sizeof(clkname), 708 "usb_host_hs_utmi_p%d_clk", i + 1); 709 710 /* If a clock is not found we won't bail out as not all 711 * platforms have all clocks and we can function without 712 * them 713 */ 714 omap->utmi_clk[i] = devm_clk_get(dev, clkname); 715 if (IS_ERR(omap->utmi_clk[i])) { 716 ret = PTR_ERR(omap->utmi_clk[i]); 717 dev_err(dev, "Failed to get clock : %s : %d\n", 718 clkname, ret); 719 goto err_mem; 720 } 721 722 snprintf(clkname, sizeof(clkname), 723 "usb_host_hs_hsic480m_p%d_clk", i + 1); 724 omap->hsic480m_clk[i] = devm_clk_get(dev, clkname); 725 if (IS_ERR(omap->hsic480m_clk[i])) { 726 ret = PTR_ERR(omap->hsic480m_clk[i]); 727 dev_err(dev, "Failed to get clock : %s : %d\n", 728 clkname, ret); 729 goto err_mem; 730 } 731 732 snprintf(clkname, sizeof(clkname), 733 "usb_host_hs_hsic60m_p%d_clk", i + 1); 734 omap->hsic60m_clk[i] = devm_clk_get(dev, clkname); 735 if (IS_ERR(omap->hsic60m_clk[i])) { 736 ret = PTR_ERR(omap->hsic60m_clk[i]); 737 dev_err(dev, "Failed to get clock : %s : %d\n", 738 clkname, ret); 739 goto err_mem; 740 } 741 } 742 743 if (is_ehci_phy_mode(pdata->port_mode[0])) { 744 ret = clk_set_parent(omap->utmi_p1_gfclk, 745 omap->xclk60mhsp1_ck); 746 if (ret != 0) { 747 dev_err(dev, "xclk60mhsp1_ck set parent failed: %d\n", 748 ret); 749 goto err_mem; 750 } 751 } else if (is_ehci_tll_mode(pdata->port_mode[0])) { 752 ret = clk_set_parent(omap->utmi_p1_gfclk, 753 omap->init_60m_fclk); 754 if (ret != 0) { 755 dev_err(dev, "P0 init_60m_fclk set parent failed: %d\n", 756 ret); 757 goto err_mem; 758 } 759 } 760 761 if (is_ehci_phy_mode(pdata->port_mode[1])) { 762 ret = clk_set_parent(omap->utmi_p2_gfclk, 763 omap->xclk60mhsp2_ck); 764 if (ret != 0) { 765 dev_err(dev, "xclk60mhsp2_ck set parent failed: %d\n", 766 ret); 767 goto err_mem; 768 } 769 } else if (is_ehci_tll_mode(pdata->port_mode[1])) { 770 ret = clk_set_parent(omap->utmi_p2_gfclk, 771 omap->init_60m_fclk); 772 if (ret != 0) { 773 dev_err(dev, "P1 init_60m_fclk set parent failed: %d\n", 774 ret); 775 goto err_mem; 776 } 777 } 778 779 initialize: 780 omap_usbhs_init(dev); 781 782 if (dev->of_node) { 783 ret = of_platform_populate(dev->of_node, 784 usbhs_child_match_table, NULL, dev); 785 786 if (ret) { 787 dev_err(dev, "Failed to create DT children: %d\n", ret); 788 goto err_mem; 789 } 790 791 } else { 792 ret = omap_usbhs_alloc_children(pdev); 793 if (ret) { 794 dev_err(dev, "omap_usbhs_alloc_children failed: %d\n", 795 ret); 796 goto err_mem; 797 } 798 } 799 800 return 0; 801 802 err_mem: 803 pm_runtime_disable(dev); 804 805 return ret; 806 } 807 808 static int usbhs_omap_remove_child(struct device *dev, void *data) 809 { 810 dev_info(dev, "unregistering\n"); 811 platform_device_unregister(to_platform_device(dev)); 812 return 0; 813 } 814 815 /** 816 * usbhs_omap_remove - shutdown processing for UHH & TLL HCDs 817 * @pdev: USB Host Controller being removed 818 * 819 * Reverses the effect of usbhs_omap_probe(). 820 */ 821 static int usbhs_omap_remove(struct platform_device *pdev) 822 { 823 pm_runtime_disable(&pdev->dev); 824 825 /* remove children */ 826 device_for_each_child(&pdev->dev, NULL, usbhs_omap_remove_child); 827 return 0; 828 } 829 830 static const struct dev_pm_ops usbhsomap_dev_pm_ops = { 831 .runtime_suspend = usbhs_runtime_suspend, 832 .runtime_resume = usbhs_runtime_resume, 833 }; 834 835 static const struct of_device_id usbhs_omap_dt_ids[] = { 836 { .compatible = "ti,usbhs-host" }, 837 { } 838 }; 839 840 MODULE_DEVICE_TABLE(of, usbhs_omap_dt_ids); 841 842 843 static struct platform_driver usbhs_omap_driver = { 844 .driver = { 845 .name = usbhs_driver_name, 846 .pm = &usbhsomap_dev_pm_ops, 847 .of_match_table = usbhs_omap_dt_ids, 848 }, 849 .probe = usbhs_omap_probe, 850 .remove = usbhs_omap_remove, 851 }; 852 853 MODULE_AUTHOR("Keshava Munegowda <keshava_mgowda@ti.com>"); 854 MODULE_AUTHOR("Roger Quadros <rogerq@ti.com>"); 855 MODULE_ALIAS("platform:" USBHS_DRIVER_NAME); 856 MODULE_LICENSE("GPL v2"); 857 MODULE_DESCRIPTION("usb host common core driver for omap EHCI and OHCI"); 858 859 static int omap_usbhs_drvinit(void) 860 { 861 return platform_driver_register(&usbhs_omap_driver); 862 } 863 864 /* 865 * init before ehci and ohci drivers; 866 * The usbhs core driver should be initialized much before 867 * the omap ehci and ohci probe functions are called. 868 * This usbhs core driver should be initialized after 869 * usb tll driver 870 */ 871 fs_initcall_sync(omap_usbhs_drvinit); 872 873 static void omap_usbhs_drvexit(void) 874 { 875 platform_driver_unregister(&usbhs_omap_driver); 876 } 877 module_exit(omap_usbhs_drvexit); 878