1 /** 2 * omap-usb-host.c - The USBHS core driver for OMAP EHCI & OHCI 3 * 4 * Copyright (C) 2011-2013 Texas Instruments Incorporated - http://www.ti.com 5 * Author: Keshava Munegowda <keshava_mgowda@ti.com> 6 * Author: Roger Quadros <rogerq@ti.com> 7 * 8 * This program is free software: you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License version 2 of 10 * the License as published by the Free Software Foundation. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program. If not, see <http://www.gnu.org/licenses/>. 19 */ 20 #include <linux/kernel.h> 21 #include <linux/module.h> 22 #include <linux/types.h> 23 #include <linux/slab.h> 24 #include <linux/delay.h> 25 #include <linux/clk.h> 26 #include <linux/dma-mapping.h> 27 #include <linux/gpio.h> 28 #include <linux/platform_device.h> 29 #include <linux/platform_data/usb-omap.h> 30 #include <linux/pm_runtime.h> 31 #include <linux/of.h> 32 #include <linux/of_platform.h> 33 #include <linux/err.h> 34 35 #include "omap-usb.h" 36 37 #define USBHS_DRIVER_NAME "usbhs_omap" 38 #define OMAP_EHCI_DEVICE "ehci-omap" 39 #define OMAP_OHCI_DEVICE "ohci-omap3" 40 41 /* OMAP USBHOST Register addresses */ 42 43 /* UHH Register Set */ 44 #define OMAP_UHH_REVISION (0x00) 45 #define OMAP_UHH_SYSCONFIG (0x10) 46 #define OMAP_UHH_SYSCONFIG_MIDLEMODE (1 << 12) 47 #define OMAP_UHH_SYSCONFIG_CACTIVITY (1 << 8) 48 #define OMAP_UHH_SYSCONFIG_SIDLEMODE (1 << 3) 49 #define OMAP_UHH_SYSCONFIG_ENAWAKEUP (1 << 2) 50 #define OMAP_UHH_SYSCONFIG_SOFTRESET (1 << 1) 51 #define OMAP_UHH_SYSCONFIG_AUTOIDLE (1 << 0) 52 53 #define OMAP_UHH_SYSSTATUS (0x14) 54 #define OMAP_UHH_HOSTCONFIG (0x40) 55 #define OMAP_UHH_HOSTCONFIG_ULPI_BYPASS (1 << 0) 56 #define OMAP_UHH_HOSTCONFIG_ULPI_P1_BYPASS (1 << 0) 57 #define OMAP_UHH_HOSTCONFIG_ULPI_P2_BYPASS (1 << 11) 58 #define OMAP_UHH_HOSTCONFIG_ULPI_P3_BYPASS (1 << 12) 59 #define OMAP_UHH_HOSTCONFIG_INCR4_BURST_EN (1 << 2) 60 #define OMAP_UHH_HOSTCONFIG_INCR8_BURST_EN (1 << 3) 61 #define OMAP_UHH_HOSTCONFIG_INCR16_BURST_EN (1 << 4) 62 #define OMAP_UHH_HOSTCONFIG_INCRX_ALIGN_EN (1 << 5) 63 #define OMAP_UHH_HOSTCONFIG_P1_CONNECT_STATUS (1 << 8) 64 #define OMAP_UHH_HOSTCONFIG_P2_CONNECT_STATUS (1 << 9) 65 #define OMAP_UHH_HOSTCONFIG_P3_CONNECT_STATUS (1 << 10) 66 #define OMAP4_UHH_HOSTCONFIG_APP_START_CLK (1 << 31) 67 68 /* OMAP4-specific defines */ 69 #define OMAP4_UHH_SYSCONFIG_IDLEMODE_CLEAR (3 << 2) 70 #define OMAP4_UHH_SYSCONFIG_NOIDLE (1 << 2) 71 #define OMAP4_UHH_SYSCONFIG_STDBYMODE_CLEAR (3 << 4) 72 #define OMAP4_UHH_SYSCONFIG_NOSTDBY (1 << 4) 73 #define OMAP4_UHH_SYSCONFIG_SOFTRESET (1 << 0) 74 75 #define OMAP4_P1_MODE_CLEAR (3 << 16) 76 #define OMAP4_P1_MODE_TLL (1 << 16) 77 #define OMAP4_P1_MODE_HSIC (3 << 16) 78 #define OMAP4_P2_MODE_CLEAR (3 << 18) 79 #define OMAP4_P2_MODE_TLL (1 << 18) 80 #define OMAP4_P2_MODE_HSIC (3 << 18) 81 82 #define OMAP_UHH_DEBUG_CSR (0x44) 83 84 /* Values of UHH_REVISION - Note: these are not given in the TRM */ 85 #define OMAP_USBHS_REV1 0x00000010 /* OMAP3 */ 86 #define OMAP_USBHS_REV2 0x50700100 /* OMAP4 */ 87 88 #define is_omap_usbhs_rev1(x) (x->usbhs_rev == OMAP_USBHS_REV1) 89 #define is_omap_usbhs_rev2(x) (x->usbhs_rev == OMAP_USBHS_REV2) 90 91 #define is_ehci_phy_mode(x) (x == OMAP_EHCI_PORT_MODE_PHY) 92 #define is_ehci_tll_mode(x) (x == OMAP_EHCI_PORT_MODE_TLL) 93 #define is_ehci_hsic_mode(x) (x == OMAP_EHCI_PORT_MODE_HSIC) 94 95 96 struct usbhs_hcd_omap { 97 int nports; 98 struct clk **utmi_clk; 99 struct clk **hsic60m_clk; 100 struct clk **hsic480m_clk; 101 102 struct clk *xclk60mhsp1_ck; 103 struct clk *xclk60mhsp2_ck; 104 struct clk *utmi_p1_gfclk; 105 struct clk *utmi_p2_gfclk; 106 struct clk *init_60m_fclk; 107 struct clk *ehci_logic_fck; 108 109 void __iomem *uhh_base; 110 111 struct usbhs_omap_platform_data *pdata; 112 113 u32 usbhs_rev; 114 }; 115 /*-------------------------------------------------------------------------*/ 116 117 const char usbhs_driver_name[] = USBHS_DRIVER_NAME; 118 static u64 usbhs_dmamask = DMA_BIT_MASK(32); 119 120 /*-------------------------------------------------------------------------*/ 121 122 static inline void usbhs_write(void __iomem *base, u32 reg, u32 val) 123 { 124 __raw_writel(val, base + reg); 125 } 126 127 static inline u32 usbhs_read(void __iomem *base, u32 reg) 128 { 129 return __raw_readl(base + reg); 130 } 131 132 static inline void usbhs_writeb(void __iomem *base, u8 reg, u8 val) 133 { 134 __raw_writeb(val, base + reg); 135 } 136 137 static inline u8 usbhs_readb(void __iomem *base, u8 reg) 138 { 139 return __raw_readb(base + reg); 140 } 141 142 /*-------------------------------------------------------------------------*/ 143 144 /** 145 * Map 'enum usbhs_omap_port_mode' found in <linux/platform_data/usb-omap.h> 146 * to the device tree binding portN-mode found in 147 * 'Documentation/devicetree/bindings/mfd/omap-usb-host.txt' 148 */ 149 static const char * const port_modes[] = { 150 [OMAP_USBHS_PORT_MODE_UNUSED] = "", 151 [OMAP_EHCI_PORT_MODE_PHY] = "ehci-phy", 152 [OMAP_EHCI_PORT_MODE_TLL] = "ehci-tll", 153 [OMAP_EHCI_PORT_MODE_HSIC] = "ehci-hsic", 154 [OMAP_OHCI_PORT_MODE_PHY_6PIN_DATSE0] = "ohci-phy-6pin-datse0", 155 [OMAP_OHCI_PORT_MODE_PHY_6PIN_DPDM] = "ohci-phy-6pin-dpdm", 156 [OMAP_OHCI_PORT_MODE_PHY_3PIN_DATSE0] = "ohci-phy-3pin-datse0", 157 [OMAP_OHCI_PORT_MODE_PHY_4PIN_DPDM] = "ohci-phy-4pin-dpdm", 158 [OMAP_OHCI_PORT_MODE_TLL_6PIN_DATSE0] = "ohci-tll-6pin-datse0", 159 [OMAP_OHCI_PORT_MODE_TLL_6PIN_DPDM] = "ohci-tll-6pin-dpdm", 160 [OMAP_OHCI_PORT_MODE_TLL_3PIN_DATSE0] = "ohci-tll-3pin-datse0", 161 [OMAP_OHCI_PORT_MODE_TLL_4PIN_DPDM] = "ohci-tll-4pin-dpdm", 162 [OMAP_OHCI_PORT_MODE_TLL_2PIN_DATSE0] = "ohci-tll-2pin-datse0", 163 [OMAP_OHCI_PORT_MODE_TLL_2PIN_DPDM] = "ohci-tll-2pin-dpdm", 164 }; 165 166 /** 167 * omap_usbhs_get_dt_port_mode - Get the 'enum usbhs_omap_port_mode' 168 * from the port mode string. 169 * @mode: The port mode string, usually obtained from device tree. 170 * 171 * The function returns the 'enum usbhs_omap_port_mode' that matches the 172 * provided port mode string as per the port_modes table. 173 * If no match is found it returns -ENODEV 174 */ 175 static const int omap_usbhs_get_dt_port_mode(const char *mode) 176 { 177 int i; 178 179 for (i = 0; i < ARRAY_SIZE(port_modes); i++) { 180 if (!strcmp(mode, port_modes[i])) 181 return i; 182 } 183 184 return -ENODEV; 185 } 186 187 static struct platform_device *omap_usbhs_alloc_child(const char *name, 188 struct resource *res, int num_resources, void *pdata, 189 size_t pdata_size, struct device *dev) 190 { 191 struct platform_device *child; 192 int ret; 193 194 child = platform_device_alloc(name, 0); 195 196 if (!child) { 197 dev_err(dev, "platform_device_alloc %s failed\n", name); 198 goto err_end; 199 } 200 201 ret = platform_device_add_resources(child, res, num_resources); 202 if (ret) { 203 dev_err(dev, "platform_device_add_resources failed\n"); 204 goto err_alloc; 205 } 206 207 ret = platform_device_add_data(child, pdata, pdata_size); 208 if (ret) { 209 dev_err(dev, "platform_device_add_data failed\n"); 210 goto err_alloc; 211 } 212 213 child->dev.dma_mask = &usbhs_dmamask; 214 dma_set_coherent_mask(&child->dev, DMA_BIT_MASK(32)); 215 child->dev.parent = dev; 216 217 ret = platform_device_add(child); 218 if (ret) { 219 dev_err(dev, "platform_device_add failed\n"); 220 goto err_alloc; 221 } 222 223 return child; 224 225 err_alloc: 226 platform_device_put(child); 227 228 err_end: 229 return NULL; 230 } 231 232 static int omap_usbhs_alloc_children(struct platform_device *pdev) 233 { 234 struct device *dev = &pdev->dev; 235 struct usbhs_omap_platform_data *pdata = dev->platform_data; 236 struct platform_device *ehci; 237 struct platform_device *ohci; 238 struct resource *res; 239 struct resource resources[2]; 240 int ret; 241 242 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ehci"); 243 if (!res) { 244 dev_err(dev, "EHCI get resource IORESOURCE_MEM failed\n"); 245 ret = -ENODEV; 246 goto err_end; 247 } 248 resources[0] = *res; 249 250 res = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "ehci-irq"); 251 if (!res) { 252 dev_err(dev, " EHCI get resource IORESOURCE_IRQ failed\n"); 253 ret = -ENODEV; 254 goto err_end; 255 } 256 resources[1] = *res; 257 258 ehci = omap_usbhs_alloc_child(OMAP_EHCI_DEVICE, resources, 2, pdata, 259 sizeof(*pdata), dev); 260 261 if (!ehci) { 262 dev_err(dev, "omap_usbhs_alloc_child failed\n"); 263 ret = -ENOMEM; 264 goto err_end; 265 } 266 267 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ohci"); 268 if (!res) { 269 dev_err(dev, "OHCI get resource IORESOURCE_MEM failed\n"); 270 ret = -ENODEV; 271 goto err_ehci; 272 } 273 resources[0] = *res; 274 275 res = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "ohci-irq"); 276 if (!res) { 277 dev_err(dev, "OHCI get resource IORESOURCE_IRQ failed\n"); 278 ret = -ENODEV; 279 goto err_ehci; 280 } 281 resources[1] = *res; 282 283 ohci = omap_usbhs_alloc_child(OMAP_OHCI_DEVICE, resources, 2, pdata, 284 sizeof(*pdata), dev); 285 if (!ohci) { 286 dev_err(dev, "omap_usbhs_alloc_child failed\n"); 287 ret = -ENOMEM; 288 goto err_ehci; 289 } 290 291 return 0; 292 293 err_ehci: 294 platform_device_unregister(ehci); 295 296 err_end: 297 return ret; 298 } 299 300 static bool is_ohci_port(enum usbhs_omap_port_mode pmode) 301 { 302 switch (pmode) { 303 case OMAP_OHCI_PORT_MODE_PHY_6PIN_DATSE0: 304 case OMAP_OHCI_PORT_MODE_PHY_6PIN_DPDM: 305 case OMAP_OHCI_PORT_MODE_PHY_3PIN_DATSE0: 306 case OMAP_OHCI_PORT_MODE_PHY_4PIN_DPDM: 307 case OMAP_OHCI_PORT_MODE_TLL_6PIN_DATSE0: 308 case OMAP_OHCI_PORT_MODE_TLL_6PIN_DPDM: 309 case OMAP_OHCI_PORT_MODE_TLL_3PIN_DATSE0: 310 case OMAP_OHCI_PORT_MODE_TLL_4PIN_DPDM: 311 case OMAP_OHCI_PORT_MODE_TLL_2PIN_DATSE0: 312 case OMAP_OHCI_PORT_MODE_TLL_2PIN_DPDM: 313 return true; 314 315 default: 316 return false; 317 } 318 } 319 320 static int usbhs_runtime_resume(struct device *dev) 321 { 322 struct usbhs_hcd_omap *omap = dev_get_drvdata(dev); 323 struct usbhs_omap_platform_data *pdata = omap->pdata; 324 int i, r; 325 326 dev_dbg(dev, "usbhs_runtime_resume\n"); 327 328 omap_tll_enable(pdata); 329 330 if (!IS_ERR(omap->ehci_logic_fck)) 331 clk_enable(omap->ehci_logic_fck); 332 333 for (i = 0; i < omap->nports; i++) { 334 switch (pdata->port_mode[i]) { 335 case OMAP_EHCI_PORT_MODE_HSIC: 336 if (!IS_ERR(omap->hsic60m_clk[i])) { 337 r = clk_enable(omap->hsic60m_clk[i]); 338 if (r) { 339 dev_err(dev, 340 "Can't enable port %d hsic60m clk:%d\n", 341 i, r); 342 } 343 } 344 345 if (!IS_ERR(omap->hsic480m_clk[i])) { 346 r = clk_enable(omap->hsic480m_clk[i]); 347 if (r) { 348 dev_err(dev, 349 "Can't enable port %d hsic480m clk:%d\n", 350 i, r); 351 } 352 } 353 /* Fall through as HSIC mode needs utmi_clk */ 354 355 case OMAP_EHCI_PORT_MODE_TLL: 356 if (!IS_ERR(omap->utmi_clk[i])) { 357 r = clk_enable(omap->utmi_clk[i]); 358 if (r) { 359 dev_err(dev, 360 "Can't enable port %d clk : %d\n", 361 i, r); 362 } 363 } 364 break; 365 default: 366 break; 367 } 368 } 369 370 return 0; 371 } 372 373 static int usbhs_runtime_suspend(struct device *dev) 374 { 375 struct usbhs_hcd_omap *omap = dev_get_drvdata(dev); 376 struct usbhs_omap_platform_data *pdata = omap->pdata; 377 int i; 378 379 dev_dbg(dev, "usbhs_runtime_suspend\n"); 380 381 for (i = 0; i < omap->nports; i++) { 382 switch (pdata->port_mode[i]) { 383 case OMAP_EHCI_PORT_MODE_HSIC: 384 if (!IS_ERR(omap->hsic60m_clk[i])) 385 clk_disable(omap->hsic60m_clk[i]); 386 387 if (!IS_ERR(omap->hsic480m_clk[i])) 388 clk_disable(omap->hsic480m_clk[i]); 389 /* Fall through as utmi_clks were used in HSIC mode */ 390 391 case OMAP_EHCI_PORT_MODE_TLL: 392 if (!IS_ERR(omap->utmi_clk[i])) 393 clk_disable(omap->utmi_clk[i]); 394 break; 395 default: 396 break; 397 } 398 } 399 400 if (!IS_ERR(omap->ehci_logic_fck)) 401 clk_disable(omap->ehci_logic_fck); 402 403 omap_tll_disable(pdata); 404 405 return 0; 406 } 407 408 static unsigned omap_usbhs_rev1_hostconfig(struct usbhs_hcd_omap *omap, 409 unsigned reg) 410 { 411 struct usbhs_omap_platform_data *pdata = omap->pdata; 412 int i; 413 414 for (i = 0; i < omap->nports; i++) { 415 switch (pdata->port_mode[i]) { 416 case OMAP_USBHS_PORT_MODE_UNUSED: 417 reg &= ~(OMAP_UHH_HOSTCONFIG_P1_CONNECT_STATUS << i); 418 break; 419 case OMAP_EHCI_PORT_MODE_PHY: 420 if (pdata->single_ulpi_bypass) 421 break; 422 423 if (i == 0) 424 reg &= ~OMAP_UHH_HOSTCONFIG_ULPI_P1_BYPASS; 425 else 426 reg &= ~(OMAP_UHH_HOSTCONFIG_ULPI_P2_BYPASS 427 << (i-1)); 428 break; 429 default: 430 if (pdata->single_ulpi_bypass) 431 break; 432 433 if (i == 0) 434 reg |= OMAP_UHH_HOSTCONFIG_ULPI_P1_BYPASS; 435 else 436 reg |= OMAP_UHH_HOSTCONFIG_ULPI_P2_BYPASS 437 << (i-1); 438 break; 439 } 440 } 441 442 if (pdata->single_ulpi_bypass) { 443 /* bypass ULPI only if none of the ports use PHY mode */ 444 reg |= OMAP_UHH_HOSTCONFIG_ULPI_BYPASS; 445 446 for (i = 0; i < omap->nports; i++) { 447 if (is_ehci_phy_mode(pdata->port_mode[i])) { 448 reg &= OMAP_UHH_HOSTCONFIG_ULPI_BYPASS; 449 break; 450 } 451 } 452 } 453 454 return reg; 455 } 456 457 static unsigned omap_usbhs_rev2_hostconfig(struct usbhs_hcd_omap *omap, 458 unsigned reg) 459 { 460 struct usbhs_omap_platform_data *pdata = omap->pdata; 461 int i; 462 463 for (i = 0; i < omap->nports; i++) { 464 /* Clear port mode fields for PHY mode */ 465 reg &= ~(OMAP4_P1_MODE_CLEAR << 2 * i); 466 467 if (is_ehci_tll_mode(pdata->port_mode[i]) || 468 (is_ohci_port(pdata->port_mode[i]))) 469 reg |= OMAP4_P1_MODE_TLL << 2 * i; 470 else if (is_ehci_hsic_mode(pdata->port_mode[i])) 471 reg |= OMAP4_P1_MODE_HSIC << 2 * i; 472 } 473 474 return reg; 475 } 476 477 static void omap_usbhs_init(struct device *dev) 478 { 479 struct usbhs_hcd_omap *omap = dev_get_drvdata(dev); 480 unsigned reg; 481 482 dev_dbg(dev, "starting TI HSUSB Controller\n"); 483 484 pm_runtime_get_sync(dev); 485 486 reg = usbhs_read(omap->uhh_base, OMAP_UHH_HOSTCONFIG); 487 /* setup ULPI bypass and burst configurations */ 488 reg |= (OMAP_UHH_HOSTCONFIG_INCR4_BURST_EN 489 | OMAP_UHH_HOSTCONFIG_INCR8_BURST_EN 490 | OMAP_UHH_HOSTCONFIG_INCR16_BURST_EN); 491 reg |= OMAP4_UHH_HOSTCONFIG_APP_START_CLK; 492 reg &= ~OMAP_UHH_HOSTCONFIG_INCRX_ALIGN_EN; 493 494 switch (omap->usbhs_rev) { 495 case OMAP_USBHS_REV1: 496 reg = omap_usbhs_rev1_hostconfig(omap, reg); 497 break; 498 499 case OMAP_USBHS_REV2: 500 reg = omap_usbhs_rev2_hostconfig(omap, reg); 501 break; 502 503 default: /* newer revisions */ 504 reg = omap_usbhs_rev2_hostconfig(omap, reg); 505 break; 506 } 507 508 usbhs_write(omap->uhh_base, OMAP_UHH_HOSTCONFIG, reg); 509 dev_dbg(dev, "UHH setup done, uhh_hostconfig=%x\n", reg); 510 511 pm_runtime_put_sync(dev); 512 } 513 514 static int usbhs_omap_get_dt_pdata(struct device *dev, 515 struct usbhs_omap_platform_data *pdata) 516 { 517 int ret, i; 518 struct device_node *node = dev->of_node; 519 520 ret = of_property_read_u32(node, "num-ports", &pdata->nports); 521 if (ret) 522 pdata->nports = 0; 523 524 if (pdata->nports > OMAP3_HS_USB_PORTS) { 525 dev_warn(dev, "Too many num_ports <%d> in device tree. Max %d\n", 526 pdata->nports, OMAP3_HS_USB_PORTS); 527 return -ENODEV; 528 } 529 530 /* get port modes */ 531 for (i = 0; i < OMAP3_HS_USB_PORTS; i++) { 532 char prop[11]; 533 const char *mode; 534 535 pdata->port_mode[i] = OMAP_USBHS_PORT_MODE_UNUSED; 536 537 snprintf(prop, sizeof(prop), "port%d-mode", i + 1); 538 ret = of_property_read_string(node, prop, &mode); 539 if (ret < 0) 540 continue; 541 542 ret = omap_usbhs_get_dt_port_mode(mode); 543 if (ret < 0) { 544 dev_warn(dev, "Invalid port%d-mode \"%s\" in device tree\n", 545 i, mode); 546 return -ENODEV; 547 } 548 549 dev_dbg(dev, "port%d-mode: %s -> %d\n", i, mode, ret); 550 pdata->port_mode[i] = ret; 551 } 552 553 /* get flags */ 554 pdata->single_ulpi_bypass = of_property_read_bool(node, 555 "single-ulpi-bypass"); 556 557 return 0; 558 } 559 560 static struct of_device_id usbhs_child_match_table[] = { 561 { .compatible = "ti,omap-ehci", }, 562 { .compatible = "ti,omap-ohci", }, 563 { } 564 }; 565 566 /** 567 * usbhs_omap_probe - initialize TI-based HCDs 568 * 569 * Allocates basic resources for this USB host controller. 570 */ 571 static int usbhs_omap_probe(struct platform_device *pdev) 572 { 573 struct device *dev = &pdev->dev; 574 struct usbhs_omap_platform_data *pdata = dev->platform_data; 575 struct usbhs_hcd_omap *omap; 576 struct resource *res; 577 int ret = 0; 578 int i; 579 bool need_logic_fck; 580 581 if (dev->of_node) { 582 /* For DT boot we populate platform data from OF node */ 583 pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); 584 if (!pdata) 585 return -ENOMEM; 586 587 ret = usbhs_omap_get_dt_pdata(dev, pdata); 588 if (ret) 589 return ret; 590 591 dev->platform_data = pdata; 592 } 593 594 if (!pdata) { 595 dev_err(dev, "Missing platform data\n"); 596 return -ENODEV; 597 } 598 599 if (pdata->nports > OMAP3_HS_USB_PORTS) { 600 dev_info(dev, "Too many num_ports <%d> in platform_data. Max %d\n", 601 pdata->nports, OMAP3_HS_USB_PORTS); 602 return -ENODEV; 603 } 604 605 omap = devm_kzalloc(dev, sizeof(*omap), GFP_KERNEL); 606 if (!omap) { 607 dev_err(dev, "Memory allocation failed\n"); 608 return -ENOMEM; 609 } 610 611 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 612 omap->uhh_base = devm_ioremap_resource(dev, res); 613 if (IS_ERR(omap->uhh_base)) 614 return PTR_ERR(omap->uhh_base); 615 616 omap->pdata = pdata; 617 618 /* Initialize the TLL subsystem */ 619 omap_tll_init(pdata); 620 621 pm_runtime_enable(dev); 622 623 platform_set_drvdata(pdev, omap); 624 pm_runtime_get_sync(dev); 625 626 omap->usbhs_rev = usbhs_read(omap->uhh_base, OMAP_UHH_REVISION); 627 628 /* we need to call runtime suspend before we update omap->nports 629 * to prevent unbalanced clk_disable() 630 */ 631 pm_runtime_put_sync(dev); 632 633 /* 634 * If platform data contains nports then use that 635 * else make out number of ports from USBHS revision 636 */ 637 if (pdata->nports) { 638 omap->nports = pdata->nports; 639 } else { 640 switch (omap->usbhs_rev) { 641 case OMAP_USBHS_REV1: 642 omap->nports = 3; 643 break; 644 case OMAP_USBHS_REV2: 645 omap->nports = 2; 646 break; 647 default: 648 omap->nports = OMAP3_HS_USB_PORTS; 649 dev_dbg(dev, 650 "USB HOST Rev:0x%d not recognized, assuming %d ports\n", 651 omap->usbhs_rev, omap->nports); 652 break; 653 } 654 pdata->nports = omap->nports; 655 } 656 657 i = sizeof(struct clk *) * omap->nports; 658 omap->utmi_clk = devm_kzalloc(dev, i, GFP_KERNEL); 659 omap->hsic480m_clk = devm_kzalloc(dev, i, GFP_KERNEL); 660 omap->hsic60m_clk = devm_kzalloc(dev, i, GFP_KERNEL); 661 662 if (!omap->utmi_clk || !omap->hsic480m_clk || !omap->hsic60m_clk) { 663 dev_err(dev, "Memory allocation failed\n"); 664 ret = -ENOMEM; 665 goto err_mem; 666 } 667 668 need_logic_fck = false; 669 for (i = 0; i < omap->nports; i++) { 670 if (is_ehci_phy_mode(i) || is_ehci_tll_mode(i) || 671 is_ehci_hsic_mode(i)) 672 need_logic_fck |= true; 673 } 674 675 omap->ehci_logic_fck = ERR_PTR(-EINVAL); 676 if (need_logic_fck) { 677 omap->ehci_logic_fck = clk_get(dev, "ehci_logic_fck"); 678 if (IS_ERR(omap->ehci_logic_fck)) { 679 ret = PTR_ERR(omap->ehci_logic_fck); 680 dev_dbg(dev, "ehci_logic_fck failed:%d\n", ret); 681 } 682 } 683 684 omap->utmi_p1_gfclk = clk_get(dev, "utmi_p1_gfclk"); 685 if (IS_ERR(omap->utmi_p1_gfclk)) { 686 ret = PTR_ERR(omap->utmi_p1_gfclk); 687 dev_err(dev, "utmi_p1_gfclk failed error:%d\n", ret); 688 goto err_p1_gfclk; 689 } 690 691 omap->utmi_p2_gfclk = clk_get(dev, "utmi_p2_gfclk"); 692 if (IS_ERR(omap->utmi_p2_gfclk)) { 693 ret = PTR_ERR(omap->utmi_p2_gfclk); 694 dev_err(dev, "utmi_p2_gfclk failed error:%d\n", ret); 695 goto err_p2_gfclk; 696 } 697 698 omap->xclk60mhsp1_ck = clk_get(dev, "xclk60mhsp1_ck"); 699 if (IS_ERR(omap->xclk60mhsp1_ck)) { 700 ret = PTR_ERR(omap->xclk60mhsp1_ck); 701 dev_err(dev, "xclk60mhsp1_ck failed error:%d\n", ret); 702 goto err_xclk60mhsp1; 703 } 704 705 omap->xclk60mhsp2_ck = clk_get(dev, "xclk60mhsp2_ck"); 706 if (IS_ERR(omap->xclk60mhsp2_ck)) { 707 ret = PTR_ERR(omap->xclk60mhsp2_ck); 708 dev_err(dev, "xclk60mhsp2_ck failed error:%d\n", ret); 709 goto err_xclk60mhsp2; 710 } 711 712 omap->init_60m_fclk = clk_get(dev, "init_60m_fclk"); 713 if (IS_ERR(omap->init_60m_fclk)) { 714 ret = PTR_ERR(omap->init_60m_fclk); 715 dev_err(dev, "init_60m_fclk failed error:%d\n", ret); 716 goto err_init60m; 717 } 718 719 for (i = 0; i < omap->nports; i++) { 720 char clkname[30]; 721 722 /* clock names are indexed from 1*/ 723 snprintf(clkname, sizeof(clkname), 724 "usb_host_hs_utmi_p%d_clk", i + 1); 725 726 /* If a clock is not found we won't bail out as not all 727 * platforms have all clocks and we can function without 728 * them 729 */ 730 omap->utmi_clk[i] = clk_get(dev, clkname); 731 if (IS_ERR(omap->utmi_clk[i])) 732 dev_dbg(dev, "Failed to get clock : %s : %ld\n", 733 clkname, PTR_ERR(omap->utmi_clk[i])); 734 735 snprintf(clkname, sizeof(clkname), 736 "usb_host_hs_hsic480m_p%d_clk", i + 1); 737 omap->hsic480m_clk[i] = clk_get(dev, clkname); 738 if (IS_ERR(omap->hsic480m_clk[i])) 739 dev_dbg(dev, "Failed to get clock : %s : %ld\n", 740 clkname, PTR_ERR(omap->hsic480m_clk[i])); 741 742 snprintf(clkname, sizeof(clkname), 743 "usb_host_hs_hsic60m_p%d_clk", i + 1); 744 omap->hsic60m_clk[i] = clk_get(dev, clkname); 745 if (IS_ERR(omap->hsic60m_clk[i])) 746 dev_dbg(dev, "Failed to get clock : %s : %ld\n", 747 clkname, PTR_ERR(omap->hsic60m_clk[i])); 748 } 749 750 if (is_ehci_phy_mode(pdata->port_mode[0])) { 751 /* for OMAP3, clk_set_parent fails */ 752 ret = clk_set_parent(omap->utmi_p1_gfclk, 753 omap->xclk60mhsp1_ck); 754 if (ret != 0) 755 dev_dbg(dev, "xclk60mhsp1_ck set parent failed: %d\n", 756 ret); 757 } else if (is_ehci_tll_mode(pdata->port_mode[0])) { 758 ret = clk_set_parent(omap->utmi_p1_gfclk, 759 omap->init_60m_fclk); 760 if (ret != 0) 761 dev_dbg(dev, "P0 init_60m_fclk set parent failed: %d\n", 762 ret); 763 } 764 765 if (is_ehci_phy_mode(pdata->port_mode[1])) { 766 ret = clk_set_parent(omap->utmi_p2_gfclk, 767 omap->xclk60mhsp2_ck); 768 if (ret != 0) 769 dev_dbg(dev, "xclk60mhsp2_ck set parent failed: %d\n", 770 ret); 771 } else if (is_ehci_tll_mode(pdata->port_mode[1])) { 772 ret = clk_set_parent(omap->utmi_p2_gfclk, 773 omap->init_60m_fclk); 774 if (ret != 0) 775 dev_dbg(dev, "P1 init_60m_fclk set parent failed: %d\n", 776 ret); 777 } 778 779 omap_usbhs_init(dev); 780 781 if (dev->of_node) { 782 ret = of_platform_populate(dev->of_node, 783 usbhs_child_match_table, NULL, dev); 784 785 if (ret) { 786 dev_err(dev, "Failed to create DT children: %d\n", ret); 787 goto err_alloc; 788 } 789 790 } else { 791 ret = omap_usbhs_alloc_children(pdev); 792 if (ret) { 793 dev_err(dev, "omap_usbhs_alloc_children failed: %d\n", 794 ret); 795 goto err_alloc; 796 } 797 } 798 799 return 0; 800 801 err_alloc: 802 for (i = 0; i < omap->nports; i++) { 803 if (!IS_ERR(omap->utmi_clk[i])) 804 clk_put(omap->utmi_clk[i]); 805 if (!IS_ERR(omap->hsic60m_clk[i])) 806 clk_put(omap->hsic60m_clk[i]); 807 if (!IS_ERR(omap->hsic480m_clk[i])) 808 clk_put(omap->hsic480m_clk[i]); 809 } 810 811 clk_put(omap->init_60m_fclk); 812 813 err_init60m: 814 clk_put(omap->xclk60mhsp2_ck); 815 816 err_xclk60mhsp2: 817 clk_put(omap->xclk60mhsp1_ck); 818 819 err_xclk60mhsp1: 820 clk_put(omap->utmi_p2_gfclk); 821 822 err_p2_gfclk: 823 clk_put(omap->utmi_p1_gfclk); 824 825 err_p1_gfclk: 826 if (!IS_ERR(omap->ehci_logic_fck)) 827 clk_put(omap->ehci_logic_fck); 828 829 err_mem: 830 pm_runtime_disable(dev); 831 832 return ret; 833 } 834 835 static int usbhs_omap_remove_child(struct device *dev, void *data) 836 { 837 dev_info(dev, "unregistering\n"); 838 platform_device_unregister(to_platform_device(dev)); 839 return 0; 840 } 841 842 /** 843 * usbhs_omap_remove - shutdown processing for UHH & TLL HCDs 844 * @pdev: USB Host Controller being removed 845 * 846 * Reverses the effect of usbhs_omap_probe(). 847 */ 848 static int usbhs_omap_remove(struct platform_device *pdev) 849 { 850 struct usbhs_hcd_omap *omap = platform_get_drvdata(pdev); 851 int i; 852 853 for (i = 0; i < omap->nports; i++) { 854 if (!IS_ERR(omap->utmi_clk[i])) 855 clk_put(omap->utmi_clk[i]); 856 if (!IS_ERR(omap->hsic60m_clk[i])) 857 clk_put(omap->hsic60m_clk[i]); 858 if (!IS_ERR(omap->hsic480m_clk[i])) 859 clk_put(omap->hsic480m_clk[i]); 860 } 861 862 clk_put(omap->init_60m_fclk); 863 clk_put(omap->utmi_p1_gfclk); 864 clk_put(omap->utmi_p2_gfclk); 865 clk_put(omap->xclk60mhsp2_ck); 866 clk_put(omap->xclk60mhsp1_ck); 867 868 if (!IS_ERR(omap->ehci_logic_fck)) 869 clk_put(omap->ehci_logic_fck); 870 871 pm_runtime_disable(&pdev->dev); 872 873 /* remove children */ 874 device_for_each_child(&pdev->dev, NULL, usbhs_omap_remove_child); 875 return 0; 876 } 877 878 static const struct dev_pm_ops usbhsomap_dev_pm_ops = { 879 .runtime_suspend = usbhs_runtime_suspend, 880 .runtime_resume = usbhs_runtime_resume, 881 }; 882 883 static const struct of_device_id usbhs_omap_dt_ids[] = { 884 { .compatible = "ti,usbhs-host" }, 885 { } 886 }; 887 888 MODULE_DEVICE_TABLE(of, usbhs_omap_dt_ids); 889 890 891 static struct platform_driver usbhs_omap_driver = { 892 .driver = { 893 .name = (char *)usbhs_driver_name, 894 .owner = THIS_MODULE, 895 .pm = &usbhsomap_dev_pm_ops, 896 .of_match_table = of_match_ptr(usbhs_omap_dt_ids), 897 }, 898 .remove = usbhs_omap_remove, 899 }; 900 901 MODULE_AUTHOR("Keshava Munegowda <keshava_mgowda@ti.com>"); 902 MODULE_AUTHOR("Roger Quadros <rogerq@ti.com>"); 903 MODULE_ALIAS("platform:" USBHS_DRIVER_NAME); 904 MODULE_LICENSE("GPL v2"); 905 MODULE_DESCRIPTION("usb host common core driver for omap EHCI and OHCI"); 906 907 static int __init omap_usbhs_drvinit(void) 908 { 909 return platform_driver_probe(&usbhs_omap_driver, usbhs_omap_probe); 910 } 911 912 /* 913 * init before ehci and ohci drivers; 914 * The usbhs core driver should be initialized much before 915 * the omap ehci and ohci probe functions are called. 916 * This usbhs core driver should be initialized after 917 * usb tll driver 918 */ 919 fs_initcall_sync(omap_usbhs_drvinit); 920 921 static void __exit omap_usbhs_drvexit(void) 922 { 923 platform_driver_unregister(&usbhs_omap_driver); 924 } 925 module_exit(omap_usbhs_drvexit); 926