1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright (c) 2009 Daniel Mack <daniel@caiaq.de> 4 * Copyright (C) 2010 Freescale Semiconductor, Inc. 5 */ 6 7 #include <common.h> 8 #include <usb.h> 9 #include <errno.h> 10 #include <wait_bit.h> 11 #include <linux/compiler.h> 12 #include <usb/ehci-ci.h> 13 #include <asm/io.h> 14 #include <asm/arch/imx-regs.h> 15 #include <asm/arch/clock.h> 16 #include <asm/mach-imx/iomux-v3.h> 17 #include <asm/mach-imx/sys_proto.h> 18 #include <dm.h> 19 #include <asm/mach-types.h> 20 #include <power/regulator.h> 21 22 #include "ehci.h" 23 24 DECLARE_GLOBAL_DATA_PTR; 25 26 #define USB_OTGREGS_OFFSET 0x000 27 #define USB_H1REGS_OFFSET 0x200 28 #define USB_H2REGS_OFFSET 0x400 29 #define USB_H3REGS_OFFSET 0x600 30 #define USB_OTHERREGS_OFFSET 0x800 31 32 #define USB_H1_CTRL_OFFSET 0x04 33 34 #define USBPHY_CTRL 0x00000030 35 #define USBPHY_CTRL_SET 0x00000034 36 #define USBPHY_CTRL_CLR 0x00000038 37 #define USBPHY_CTRL_TOG 0x0000003c 38 39 #define USBPHY_PWD 0x00000000 40 #define USBPHY_CTRL_SFTRST 0x80000000 41 #define USBPHY_CTRL_CLKGATE 0x40000000 42 #define USBPHY_CTRL_ENUTMILEVEL3 0x00008000 43 #define USBPHY_CTRL_ENUTMILEVEL2 0x00004000 44 #define USBPHY_CTRL_OTG_ID 0x08000000 45 46 #define ANADIG_USB2_CHRG_DETECT_EN_B 0x00100000 47 #define ANADIG_USB2_CHRG_DETECT_CHK_CHRG_B 0x00080000 48 49 #define ANADIG_USB2_PLL_480_CTRL_BYPASS 0x00010000 50 #define ANADIG_USB2_PLL_480_CTRL_ENABLE 0x00002000 51 #define ANADIG_USB2_PLL_480_CTRL_POWER 0x00001000 52 #define ANADIG_USB2_PLL_480_CTRL_EN_USB_CLKS 0x00000040 53 54 #define USBNC_OFFSET 0x200 55 #define USBNC_PHY_STATUS_OFFSET 0x23C 56 #define USBNC_PHYSTATUS_ID_DIG (1 << 4) /* otg_id status */ 57 #define USBNC_PHYCFG2_ACAENB (1 << 4) /* otg_id detection enable */ 58 #define UCTRL_PWR_POL (1 << 9) /* OTG Polarity of Power Pin */ 59 #define UCTRL_OVER_CUR_POL (1 << 8) /* OTG Polarity of Overcurrent */ 60 #define UCTRL_OVER_CUR_DIS (1 << 7) /* Disable OTG Overcurrent Detection */ 61 62 /* USBCMD */ 63 #define UCMD_RUN_STOP (1 << 0) /* controller run/stop */ 64 #define UCMD_RESET (1 << 1) /* controller reset */ 65 66 #if defined(CONFIG_MX6) 67 static const unsigned phy_bases[] = { 68 USB_PHY0_BASE_ADDR, 69 USB_PHY1_BASE_ADDR, 70 }; 71 72 static void usb_internal_phy_clock_gate(int index, int on) 73 { 74 void __iomem *phy_reg; 75 76 if (index >= ARRAY_SIZE(phy_bases)) 77 return; 78 79 phy_reg = (void __iomem *)phy_bases[index]; 80 phy_reg += on ? USBPHY_CTRL_CLR : USBPHY_CTRL_SET; 81 writel(USBPHY_CTRL_CLKGATE, phy_reg); 82 } 83 84 static void usb_power_config(int index) 85 { 86 struct anatop_regs __iomem *anatop = 87 (struct anatop_regs __iomem *)ANATOP_BASE_ADDR; 88 void __iomem *chrg_detect; 89 void __iomem *pll_480_ctrl_clr; 90 void __iomem *pll_480_ctrl_set; 91 92 switch (index) { 93 case 0: 94 chrg_detect = &anatop->usb1_chrg_detect; 95 pll_480_ctrl_clr = &anatop->usb1_pll_480_ctrl_clr; 96 pll_480_ctrl_set = &anatop->usb1_pll_480_ctrl_set; 97 break; 98 case 1: 99 chrg_detect = &anatop->usb2_chrg_detect; 100 pll_480_ctrl_clr = &anatop->usb2_pll_480_ctrl_clr; 101 pll_480_ctrl_set = &anatop->usb2_pll_480_ctrl_set; 102 break; 103 default: 104 return; 105 } 106 /* 107 * Some phy and power's special controls 108 * 1. The external charger detector needs to be disabled 109 * or the signal at DP will be poor 110 * 2. The PLL's power and output to usb 111 * is totally controlled by IC, so the Software only needs 112 * to enable them at initializtion. 113 */ 114 writel(ANADIG_USB2_CHRG_DETECT_EN_B | 115 ANADIG_USB2_CHRG_DETECT_CHK_CHRG_B, 116 chrg_detect); 117 118 writel(ANADIG_USB2_PLL_480_CTRL_BYPASS, 119 pll_480_ctrl_clr); 120 121 writel(ANADIG_USB2_PLL_480_CTRL_ENABLE | 122 ANADIG_USB2_PLL_480_CTRL_POWER | 123 ANADIG_USB2_PLL_480_CTRL_EN_USB_CLKS, 124 pll_480_ctrl_set); 125 } 126 127 /* Return 0 : host node, <>0 : device mode */ 128 static int usb_phy_enable(int index, struct usb_ehci *ehci) 129 { 130 void __iomem *phy_reg; 131 void __iomem *phy_ctrl; 132 void __iomem *usb_cmd; 133 int ret; 134 135 if (index >= ARRAY_SIZE(phy_bases)) 136 return 0; 137 138 phy_reg = (void __iomem *)phy_bases[index]; 139 phy_ctrl = (void __iomem *)(phy_reg + USBPHY_CTRL); 140 usb_cmd = (void __iomem *)&ehci->usbcmd; 141 142 /* Stop then Reset */ 143 clrbits_le32(usb_cmd, UCMD_RUN_STOP); 144 ret = wait_for_bit_le32(usb_cmd, UCMD_RUN_STOP, false, 10000, false); 145 if (ret) 146 return ret; 147 148 setbits_le32(usb_cmd, UCMD_RESET); 149 ret = wait_for_bit_le32(usb_cmd, UCMD_RESET, false, 10000, false); 150 if (ret) 151 return ret; 152 153 /* Reset USBPHY module */ 154 setbits_le32(phy_ctrl, USBPHY_CTRL_SFTRST); 155 udelay(10); 156 157 /* Remove CLKGATE and SFTRST */ 158 clrbits_le32(phy_ctrl, USBPHY_CTRL_CLKGATE | USBPHY_CTRL_SFTRST); 159 udelay(10); 160 161 /* Power up the PHY */ 162 writel(0, phy_reg + USBPHY_PWD); 163 /* enable FS/LS device */ 164 setbits_le32(phy_ctrl, USBPHY_CTRL_ENUTMILEVEL2 | 165 USBPHY_CTRL_ENUTMILEVEL3); 166 167 return 0; 168 } 169 170 int usb_phy_mode(int port) 171 { 172 void __iomem *phy_reg; 173 void __iomem *phy_ctrl; 174 u32 val; 175 176 phy_reg = (void __iomem *)phy_bases[port]; 177 phy_ctrl = (void __iomem *)(phy_reg + USBPHY_CTRL); 178 179 val = readl(phy_ctrl); 180 181 if (val & USBPHY_CTRL_OTG_ID) 182 return USB_INIT_DEVICE; 183 else 184 return USB_INIT_HOST; 185 } 186 187 /* Base address for this IP block is 0x02184800 */ 188 struct usbnc_regs { 189 u32 ctrl[4]; /* otg/host1-3 */ 190 u32 uh2_hsic_ctrl; 191 u32 uh3_hsic_ctrl; 192 u32 otg_phy_ctrl_0; 193 u32 uh1_phy_ctrl_0; 194 }; 195 #elif defined(CONFIG_MX7) 196 struct usbnc_regs { 197 u32 ctrl1; 198 u32 ctrl2; 199 u32 reserve1[10]; 200 u32 phy_cfg1; 201 u32 phy_cfg2; 202 u32 reserve2; 203 u32 phy_status; 204 u32 reserve3[4]; 205 u32 adp_cfg1; 206 u32 adp_cfg2; 207 u32 adp_status; 208 }; 209 210 static void usb_power_config(int index) 211 { 212 struct usbnc_regs *usbnc = (struct usbnc_regs *)(USB_BASE_ADDR + 213 (0x10000 * index) + USBNC_OFFSET); 214 void __iomem *phy_cfg2 = (void __iomem *)(&usbnc->phy_cfg2); 215 void __iomem *ctrl = (void __iomem *)(&usbnc->ctrl1); 216 217 /* 218 * Clear the ACAENB to enable usb_otg_id detection, 219 * otherwise it is the ACA detection enabled. 220 */ 221 clrbits_le32(phy_cfg2, USBNC_PHYCFG2_ACAENB); 222 223 /* Set power polarity to high active */ 224 #ifdef CONFIG_MXC_USB_OTG_HACTIVE 225 setbits_le32(ctrl, UCTRL_PWR_POL); 226 #else 227 clrbits_le32(ctrl, UCTRL_PWR_POL); 228 #endif 229 } 230 231 int usb_phy_mode(int port) 232 { 233 struct usbnc_regs *usbnc = (struct usbnc_regs *)(USB_BASE_ADDR + 234 (0x10000 * port) + USBNC_OFFSET); 235 void __iomem *status = (void __iomem *)(&usbnc->phy_status); 236 u32 val; 237 238 val = readl(status); 239 240 if (val & USBNC_PHYSTATUS_ID_DIG) 241 return USB_INIT_DEVICE; 242 else 243 return USB_INIT_HOST; 244 } 245 #endif 246 247 static void usb_oc_config(int index) 248 { 249 #if defined(CONFIG_MX6) 250 struct usbnc_regs *usbnc = (struct usbnc_regs *)(USB_BASE_ADDR + 251 USB_OTHERREGS_OFFSET); 252 void __iomem *ctrl = (void __iomem *)(&usbnc->ctrl[index]); 253 #elif defined(CONFIG_MX7) 254 struct usbnc_regs *usbnc = (struct usbnc_regs *)(USB_BASE_ADDR + 255 (0x10000 * index) + USBNC_OFFSET); 256 void __iomem *ctrl = (void __iomem *)(&usbnc->ctrl1); 257 #endif 258 259 #if CONFIG_MACH_TYPE == MACH_TYPE_MX6Q_ARM2 260 /* mx6qarm2 seems to required a different setting*/ 261 clrbits_le32(ctrl, UCTRL_OVER_CUR_POL); 262 #else 263 setbits_le32(ctrl, UCTRL_OVER_CUR_POL); 264 #endif 265 266 setbits_le32(ctrl, UCTRL_OVER_CUR_DIS); 267 } 268 269 /** 270 * board_usb_phy_mode - override usb phy mode 271 * @port: usb host/otg port 272 * 273 * Target board specific, override usb_phy_mode. 274 * When usb-otg is used as usb host port, iomux pad usb_otg_id can be 275 * left disconnected in this case usb_phy_mode will not be able to identify 276 * the phy mode that usb port is used. 277 * Machine file overrides board_usb_phy_mode. 278 * 279 * Return: USB_INIT_DEVICE or USB_INIT_HOST 280 */ 281 int __weak board_usb_phy_mode(int port) 282 { 283 return usb_phy_mode(port); 284 } 285 286 /** 287 * board_ehci_hcd_init - set usb vbus voltage 288 * @port: usb otg port 289 * 290 * Target board specific, setup iomux pad to setup supply vbus voltage 291 * for usb otg port. Machine board file overrides board_ehci_hcd_init 292 * 293 * Return: 0 Success 294 */ 295 int __weak board_ehci_hcd_init(int port) 296 { 297 return 0; 298 } 299 300 /** 301 * board_ehci_power - enables/disables usb vbus voltage 302 * @port: usb otg port 303 * @on: on/off vbus voltage 304 * 305 * Enables/disables supply vbus voltage for usb otg port. 306 * Machine board file overrides board_ehci_power 307 * 308 * Return: 0 Success 309 */ 310 int __weak board_ehci_power(int port, int on) 311 { 312 return 0; 313 } 314 315 int ehci_mx6_common_init(struct usb_ehci *ehci, int index) 316 { 317 int ret; 318 319 enable_usboh3_clk(1); 320 mdelay(1); 321 322 /* Do board specific initialization */ 323 ret = board_ehci_hcd_init(index); 324 if (ret) 325 return ret; 326 327 usb_power_config(index); 328 usb_oc_config(index); 329 330 #if defined(CONFIG_MX6) 331 usb_internal_phy_clock_gate(index, 1); 332 usb_phy_enable(index, ehci); 333 #endif 334 335 return 0; 336 } 337 338 #if !CONFIG_IS_ENABLED(DM_USB) 339 int ehci_hcd_init(int index, enum usb_init_type init, 340 struct ehci_hccr **hccr, struct ehci_hcor **hcor) 341 { 342 enum usb_init_type type; 343 #if defined(CONFIG_MX6) 344 u32 controller_spacing = 0x200; 345 #elif defined(CONFIG_MX7) 346 u32 controller_spacing = 0x10000; 347 #endif 348 struct usb_ehci *ehci = (struct usb_ehci *)(USB_BASE_ADDR + 349 (controller_spacing * index)); 350 int ret; 351 352 if (index > 3) 353 return -EINVAL; 354 355 ret = ehci_mx6_common_init(ehci, index); 356 if (ret) 357 return ret; 358 359 type = board_usb_phy_mode(index); 360 361 if (hccr && hcor) { 362 *hccr = (struct ehci_hccr *)((uint32_t)&ehci->caplength); 363 *hcor = (struct ehci_hcor *)((uint32_t)*hccr + 364 HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase))); 365 } 366 367 if ((type == init) || (type == USB_INIT_DEVICE)) 368 board_ehci_power(index, (type == USB_INIT_DEVICE) ? 0 : 1); 369 if (type != init) 370 return -ENODEV; 371 if (type == USB_INIT_DEVICE) 372 return 0; 373 374 setbits_le32(&ehci->usbmode, CM_HOST); 375 writel(CONFIG_MXC_USB_PORTSC, &ehci->portsc); 376 setbits_le32(&ehci->portsc, USB_EN); 377 378 mdelay(10); 379 380 return 0; 381 } 382 383 int ehci_hcd_stop(int index) 384 { 385 return 0; 386 } 387 #else 388 struct ehci_mx6_priv_data { 389 struct ehci_ctrl ctrl; 390 struct usb_ehci *ehci; 391 struct udevice *vbus_supply; 392 enum usb_init_type init_type; 393 int portnr; 394 }; 395 396 static int mx6_init_after_reset(struct ehci_ctrl *dev) 397 { 398 struct ehci_mx6_priv_data *priv = dev->priv; 399 enum usb_init_type type = priv->init_type; 400 struct usb_ehci *ehci = priv->ehci; 401 int ret; 402 403 ret = ehci_mx6_common_init(priv->ehci, priv->portnr); 404 if (ret) 405 return ret; 406 407 #if CONFIG_IS_ENABLED(DM_REGULATOR) 408 if (priv->vbus_supply) { 409 ret = regulator_set_enable(priv->vbus_supply, 410 (type == USB_INIT_DEVICE) ? 411 false : true); 412 if (ret) { 413 puts("Error enabling VBUS supply\n"); 414 return ret; 415 } 416 } 417 #endif 418 419 if (type == USB_INIT_DEVICE) 420 return 0; 421 422 setbits_le32(&ehci->usbmode, CM_HOST); 423 writel(CONFIG_MXC_USB_PORTSC, &ehci->portsc); 424 setbits_le32(&ehci->portsc, USB_EN); 425 426 mdelay(10); 427 428 return 0; 429 } 430 431 static const struct ehci_ops mx6_ehci_ops = { 432 .init_after_reset = mx6_init_after_reset 433 }; 434 435 static int ehci_usb_phy_mode(struct udevice *dev) 436 { 437 struct usb_platdata *plat = dev_get_platdata(dev); 438 void *__iomem addr = (void *__iomem)devfdt_get_addr(dev); 439 void *__iomem phy_ctrl, *__iomem phy_status; 440 const void *blob = gd->fdt_blob; 441 int offset = dev_of_offset(dev), phy_off; 442 u32 val; 443 444 /* 445 * About fsl,usbphy, Refer to 446 * Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt. 447 */ 448 if (is_mx6()) { 449 phy_off = fdtdec_lookup_phandle(blob, 450 offset, 451 "fsl,usbphy"); 452 if (phy_off < 0) 453 return -EINVAL; 454 455 addr = (void __iomem *)fdtdec_get_addr(blob, phy_off, 456 "reg"); 457 if ((fdt_addr_t)addr == FDT_ADDR_T_NONE) 458 return -EINVAL; 459 460 phy_ctrl = (void __iomem *)(addr + USBPHY_CTRL); 461 val = readl(phy_ctrl); 462 463 if (val & USBPHY_CTRL_OTG_ID) 464 plat->init_type = USB_INIT_DEVICE; 465 else 466 plat->init_type = USB_INIT_HOST; 467 } else if (is_mx7()) { 468 phy_status = (void __iomem *)(addr + 469 USBNC_PHY_STATUS_OFFSET); 470 val = readl(phy_status); 471 472 if (val & USBNC_PHYSTATUS_ID_DIG) 473 plat->init_type = USB_INIT_DEVICE; 474 else 475 plat->init_type = USB_INIT_HOST; 476 } else { 477 return -EINVAL; 478 } 479 480 return 0; 481 } 482 483 static int ehci_usb_ofdata_to_platdata(struct udevice *dev) 484 { 485 struct usb_platdata *plat = dev_get_platdata(dev); 486 const char *mode; 487 488 mode = fdt_getprop(gd->fdt_blob, dev_of_offset(dev), "dr_mode", NULL); 489 if (mode) { 490 if (strcmp(mode, "peripheral") == 0) 491 plat->init_type = USB_INIT_DEVICE; 492 else if (strcmp(mode, "host") == 0) 493 plat->init_type = USB_INIT_HOST; 494 else if (strcmp(mode, "otg") == 0) 495 return ehci_usb_phy_mode(dev); 496 else 497 return -EINVAL; 498 499 return 0; 500 } 501 502 return ehci_usb_phy_mode(dev); 503 } 504 505 static int ehci_usb_probe(struct udevice *dev) 506 { 507 struct usb_platdata *plat = dev_get_platdata(dev); 508 struct usb_ehci *ehci = (struct usb_ehci *)devfdt_get_addr(dev); 509 struct ehci_mx6_priv_data *priv = dev_get_priv(dev); 510 enum usb_init_type type = plat->init_type; 511 struct ehci_hccr *hccr; 512 struct ehci_hcor *hcor; 513 int ret; 514 515 priv->ehci = ehci; 516 priv->portnr = dev->seq; 517 priv->init_type = type; 518 519 #if CONFIG_IS_ENABLED(DM_REGULATOR) 520 ret = device_get_supply_regulator(dev, "vbus-supply", 521 &priv->vbus_supply); 522 if (ret) 523 debug("%s: No vbus supply\n", dev->name); 524 #endif 525 ret = ehci_mx6_common_init(ehci, priv->portnr); 526 if (ret) 527 return ret; 528 529 #if CONFIG_IS_ENABLED(DM_REGULATOR) 530 if (priv->vbus_supply) { 531 ret = regulator_set_enable(priv->vbus_supply, 532 (type == USB_INIT_DEVICE) ? 533 false : true); 534 if (ret) { 535 puts("Error enabling VBUS supply\n"); 536 return ret; 537 } 538 } 539 #endif 540 541 if (priv->init_type == USB_INIT_HOST) { 542 setbits_le32(&ehci->usbmode, CM_HOST); 543 writel(CONFIG_MXC_USB_PORTSC, &ehci->portsc); 544 setbits_le32(&ehci->portsc, USB_EN); 545 } 546 547 mdelay(10); 548 549 hccr = (struct ehci_hccr *)((uint32_t)&ehci->caplength); 550 hcor = (struct ehci_hcor *)((uint32_t)hccr + 551 HC_LENGTH(ehci_readl(&(hccr)->cr_capbase))); 552 553 return ehci_register(dev, hccr, hcor, &mx6_ehci_ops, 0, priv->init_type); 554 } 555 556 static const struct udevice_id mx6_usb_ids[] = { 557 { .compatible = "fsl,imx27-usb" }, 558 { } 559 }; 560 561 U_BOOT_DRIVER(usb_mx6) = { 562 .name = "ehci_mx6", 563 .id = UCLASS_USB, 564 .of_match = mx6_usb_ids, 565 .ofdata_to_platdata = ehci_usb_ofdata_to_platdata, 566 .probe = ehci_usb_probe, 567 .remove = ehci_deregister, 568 .ops = &ehci_usb_ops, 569 .platdata_auto_alloc_size = sizeof(struct usb_platdata), 570 .priv_auto_alloc_size = sizeof(struct ehci_mx6_priv_data), 571 .flags = DM_FLAG_ALLOC_PRIV_DMA, 572 }; 573 #endif 574