arch/arm/mach-omap1/usb.c

   1 /*
   2  * Platform level USB initialization for FS USB OTG controller on omap1 and 24xx
   3  *
   4  * Copyright (C) 2004 Texas Instruments, Inc.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include <linux/module.h>
  22 #include <linux/kernel.h>
  23 #include <linux/init.h>
  24 #include <linux/platform_device.h>
  25 #include <linux/io.h>
  26
  27 #include <asm/irq.h>
  28
  29 #include <plat/mux.h>
  30 #include <plat/usb.h>
  31
  32 /* These routines should handle the standard chip-specific modes
  33  * for usb0/1/2 ports, covering basic mux and transceiver setup.
  34  *
  35  * Some board-*.c files will need to set up additional mux options,
  36  * like for suspend handling, vbus sensing, GPIOs, and the D+ pullup.
  37  */
  38
  39 /* TESTED ON:
  40  *  - 1611B H2 (with usb1 mini-AB) using standard Mini-B or OTG cables
  41  *  - 5912 OSK OHCI (with usb0 standard-A), standard A-to-B cables
  42  *  - 5912 OSK UDC, with *nonstandard* A-to-A cable
  43  *  - 1510 Innovator UDC with bundled usb0 cable
  44  *  - 1510 Innovator OHCI with bundled usb1/usb2 cable
  45  *  - 1510 Innovator OHCI with custom usb0 cable, feeding 5V VBUS
  46  *  - 1710 custom development board using alternate pin group
  47  *  - 1710 H3 (with usb1 mini-AB) using standard Mini-B or OTG cables
  48  */
  49
  50 #define INT_USB_IRQ_GEN         IH2_BASE + 20
  51 #define INT_USB_IRQ_NISO        IH2_BASE + 30
  52 #define INT_USB_IRQ_ISO         IH2_BASE + 29
  53 #define INT_USB_IRQ_HGEN        INT_USB_HHC_1
  54 #define INT_USB_IRQ_OTG         IH2_BASE + 8
  55
  56 #ifdef  CONFIG_USB_GADGET_OMAP
  57
  58 static struct resource udc_resources[] = {
  59         /* order is significant! */
  60         {               /* registers */
  61                 .start          = UDC_BASE,
  62                 .end            = UDC_BASE + 0xff,
  63                 .flags          = IORESOURCE_MEM,
  64         }, {            /* general IRQ */
  65                 .start          = INT_USB_IRQ_GEN,
  66                 .flags          = IORESOURCE_IRQ,
  67         }, {            /* PIO IRQ */
  68                 .start          = INT_USB_IRQ_NISO,
  69                 .flags          = IORESOURCE_IRQ,
  70         }, {            /* SOF IRQ */
  71                 .start          = INT_USB_IRQ_ISO,
  72                 .flags          = IORESOURCE_IRQ,
  73         },
  74 };
  75
  76 static u64 udc_dmamask = ~(u32)0;
  77
  78 static struct platform_device udc_device = {
  79         .name           = "omap_udc",
  80         .id             = -1,
  81         .dev = {
  82                 .dma_mask               = &udc_dmamask,
  83                 .coherent_dma_mask      = 0xffffffff,
  84         },
  85         .num_resources  = ARRAY_SIZE(udc_resources),
  86         .resource       = udc_resources,
  87 };
  88
  89 static inline void udc_device_init(struct omap_usb_config *pdata)
  90 {
  91         /* IRQ numbers for omap7xx */
  92         if(cpu_is_omap7xx()) {
  93                 udc_resources[1].start = INT_7XX_USB_GENI;
  94                 udc_resources[2].start = INT_7XX_USB_NON_ISO;
  95                 udc_resources[3].start = INT_7XX_USB_ISO;
  96         }
  97         pdata->udc_device = &udc_device;
  98 }
  99
 100 #else
 101
 102 static inline void udc_device_init(struct omap_usb_config *pdata)
 103 {
 104 }
 105
 106 #endif
 107
 108 #if     defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE)
 109
 110 /* The dmamask must be set for OHCI to work */
 111 static u64 ohci_dmamask = ~(u32)0;
 112
 113 static struct resource ohci_resources[] = {
 114         {
 115                 .start  = OMAP_OHCI_BASE,
 116                 .end    = OMAP_OHCI_BASE + 0xff,
 117                 .flags  = IORESOURCE_MEM,
 118         },
 119         {
 120                 .start  = INT_USB_IRQ_HGEN,
 121                 .flags  = IORESOURCE_IRQ,
 122         },
 123 };
 124
 125 static struct platform_device ohci_device = {
 126         .name                   = "ohci",
 127         .id                     = -1,
 128         .dev = {
 129                 .dma_mask               = &ohci_dmamask,
 130                 .coherent_dma_mask      = 0xffffffff,
 131         },
 132         .num_resources  = ARRAY_SIZE(ohci_resources),
 133         .resource               = ohci_resources,
 134 };
 135
 136 static inline void ohci_device_init(struct omap_usb_config *pdata)
 137 {
 138         if (cpu_is_omap7xx())
 139                 ohci_resources[1].start = INT_7XX_USB_HHC_1;
 140         pdata->ohci_device = &ohci_device;
 141 }
 142
 143 #else
 144
 145 static inline void ohci_device_init(struct omap_usb_config *pdata)
 146 {
 147 }
 148
 149 #endif
 150
 151 #if     defined(CONFIG_USB_OTG) && defined(CONFIG_ARCH_OMAP_OTG)
 152
 153 static struct resource otg_resources[] = {
 154         /* order is significant! */
 155         {
 156                 .start          = OTG_BASE,
 157                 .end            = OTG_BASE + 0xff,
 158                 .flags          = IORESOURCE_MEM,
 159         }, {
 160                 .start          = INT_USB_IRQ_OTG,
 161                 .flags          = IORESOURCE_IRQ,
 162         },
 163 };
 164
 165 static struct platform_device otg_device = {
 166         .name           = "omap_otg",
 167         .id             = -1,
 168         .num_resources  = ARRAY_SIZE(otg_resources),
 169         .resource       = otg_resources,
 170 };
 171
 172 static inline void otg_device_init(struct omap_usb_config *pdata)
 173 {
 174         if (cpu_is_omap7xx())
 175                 otg_resources[1].start = INT_7XX_USB_OTG;
 176         pdata->otg_device = &otg_device;
 177 }
 178
 179 #else
 180
 181 static inline void otg_device_init(struct omap_usb_config *pdata)
 182 {
 183 }
 184
 185 #endif
 186
 187 u32 __init omap1_usb0_init(unsigned nwires, unsigned is_device)
 188 {
 189         u32     syscon1 = 0;
 190
 191         if (nwires == 0) {
 192                 if (!cpu_is_omap15xx()) {
 193                         u32 l;
 194
 195                         /* pulldown D+/D- */
 196                         l = omap_readl(USB_TRANSCEIVER_CTRL);
 197                         l &= ~(3 << 1);
 198                         omap_writel(l, USB_TRANSCEIVER_CTRL);
 199                 }
 200                 return 0;
 201         }
 202
 203         if (is_device) {
 204                 if (cpu_is_omap7xx()) {
 205                         omap_cfg_reg(AA17_7XX_USB_DM);
 206                         omap_cfg_reg(W16_7XX_USB_PU_EN);
 207                         omap_cfg_reg(W17_7XX_USB_VBUSI);
 208                         omap_cfg_reg(W18_7XX_USB_DMCK_OUT);
 209                         omap_cfg_reg(W19_7XX_USB_DCRST);
 210                 } else
 211                         omap_cfg_reg(W4_USB_PUEN);
 212         }
 213
 214         if (nwires == 2) {
 215                 u32 l;
 216
 217                 // omap_cfg_reg(P9_USB_DP);
 218                 // omap_cfg_reg(R8_USB_DM);
 219
 220                 if (cpu_is_omap15xx()) {
 221                         /* This works on 1510-Innovator */
 222                         return 0;
 223                 }
 224
 225                 /* NOTES:
 226                  *  - peripheral should configure VBUS detection!
 227                  *  - only peripherals may use the internal D+/D- pulldowns
 228                  *  - OTG support on this port not yet written
 229                  */
 230
 231                 /* Don't do this for omap7xx -- it causes USB to not work correctly */
 232                 if (!cpu_is_omap7xx()) {
 233                         l = omap_readl(USB_TRANSCEIVER_CTRL);
 234                         l &= ~(7 << 4);
 235                         if (!is_device)
 236                                 l |= (3 << 1);
 237                         omap_writel(l, USB_TRANSCEIVER_CTRL);
 238                 }
 239
 240                 return 3 << 16;
 241         }
 242
 243         /* alternate pin config, external transceiver */
 244         if (cpu_is_omap15xx()) {
 245                 printk(KERN_ERR "no usb0 alt pin config on 15xx\n");
 246                 return 0;
 247         }
 248
 249         omap_cfg_reg(V6_USB0_TXD);
 250         omap_cfg_reg(W9_USB0_TXEN);
 251         omap_cfg_reg(W5_USB0_SE0);
 252         if (nwires != 3)
 253                 omap_cfg_reg(Y5_USB0_RCV);
 254
 255         /* NOTE:  SPEED and SUSP aren't configured here.  OTG hosts
 256          * may be able to use I2C requests to set those bits along
 257          * with VBUS switching and overcurrent detection.
 258          */
 259
 260         if (nwires != 6) {
 261                 u32 l;
 262
 263                 l = omap_readl(USB_TRANSCEIVER_CTRL);
 264                 l &= ~CONF_USB2_UNI_R;
 265                 omap_writel(l, USB_TRANSCEIVER_CTRL);
 266         }
 267
 268         switch (nwires) {
 269         case 3:
 270                 syscon1 = 2;
 271                 break;
 272         case 4:
 273                 syscon1 = 1;
 274                 break;
 275         case 6:
 276                 syscon1 = 3;
 277                 {
 278                         u32 l;
 279
 280                         omap_cfg_reg(AA9_USB0_VP);
 281                         omap_cfg_reg(R9_USB0_VM);
 282                         l = omap_readl(USB_TRANSCEIVER_CTRL);
 283                         l |= CONF_USB2_UNI_R;
 284                         omap_writel(l, USB_TRANSCEIVER_CTRL);
 285                 }
 286                 break;
 287         default:
 288                 printk(KERN_ERR "illegal usb%d %d-wire transceiver\n",
 289                         0, nwires);
 290         }
 291
 292         return syscon1 << 16;
 293 }
 294
 295 u32 __init omap1_usb1_init(unsigned nwires)
 296 {
 297         u32     syscon1 = 0;
 298
 299         if (!cpu_is_omap15xx() && nwires != 6) {
 300                 u32 l;
 301
 302                 l = omap_readl(USB_TRANSCEIVER_CTRL);
 303                 l &= ~CONF_USB1_UNI_R;
 304                 omap_writel(l, USB_TRANSCEIVER_CTRL);
 305         }
 306         if (nwires == 0)
 307                 return 0;
 308
 309         /* external transceiver */
 310         omap_cfg_reg(USB1_TXD);
 311         omap_cfg_reg(USB1_TXEN);
 312         if (nwires != 3)
 313                 omap_cfg_reg(USB1_RCV);
 314
 315         if (cpu_is_omap15xx()) {
 316                 omap_cfg_reg(USB1_SEO);
 317                 omap_cfg_reg(USB1_SPEED);
 318                 // SUSP
 319         } else if (cpu_is_omap1610() || cpu_is_omap5912()) {
 320                 omap_cfg_reg(W13_1610_USB1_SE0);
 321                 omap_cfg_reg(R13_1610_USB1_SPEED);
 322                 // SUSP
 323         } else if (cpu_is_omap1710()) {
 324                 omap_cfg_reg(R13_1710_USB1_SE0);
 325                 // SUSP
 326         } else {
 327                 pr_debug("usb%d cpu unrecognized\n", 1);
 328                 return 0;
 329         }
 330
 331         switch (nwires) {
 332         case 2:
 333                 goto bad;
 334         case 3:
 335                 syscon1 = 2;
 336                 break;
 337         case 4:
 338                 syscon1 = 1;
 339                 break;
 340         case 6:
 341                 syscon1 = 3;
 342                 omap_cfg_reg(USB1_VP);
 343                 omap_cfg_reg(USB1_VM);
 344                 if (!cpu_is_omap15xx()) {
 345                         u32 l;
 346
 347                         l = omap_readl(USB_TRANSCEIVER_CTRL);
 348                         l |= CONF_USB1_UNI_R;
 349                         omap_writel(l, USB_TRANSCEIVER_CTRL);
 350                 }
 351                 break;
 352         default:
 353 bad:
 354                 printk(KERN_ERR "illegal usb%d %d-wire transceiver\n",
 355                         1, nwires);
 356         }
 357
 358         return syscon1 << 20;
 359 }
 360
 361 u32 __init omap1_usb2_init(unsigned nwires, unsigned alt_pingroup)
 362 {
 363         u32     syscon1 = 0;
 364
 365         /* NOTE omap1 erratum: must leave USB2_UNI_R set if usb0 in use */
 366         if (alt_pingroup || nwires == 0)
 367                 return 0;
 368
 369         if (!cpu_is_omap15xx() && nwires != 6) {
 370                 u32 l;
 371
 372                 l = omap_readl(USB_TRANSCEIVER_CTRL);
 373                 l &= ~CONF_USB2_UNI_R;
 374                 omap_writel(l, USB_TRANSCEIVER_CTRL);
 375         }
 376
 377         /* external transceiver */
 378         if (cpu_is_omap15xx()) {
 379                 omap_cfg_reg(USB2_TXD);
 380                 omap_cfg_reg(USB2_TXEN);
 381                 omap_cfg_reg(USB2_SEO);
 382                 if (nwires != 3)
 383                         omap_cfg_reg(USB2_RCV);
 384                 /* there is no USB2_SPEED */
 385         } else if (cpu_is_omap16xx()) {
 386                 omap_cfg_reg(V6_USB2_TXD);
 387                 omap_cfg_reg(W9_USB2_TXEN);
 388                 omap_cfg_reg(W5_USB2_SE0);
 389                 if (nwires != 3)
 390                         omap_cfg_reg(Y5_USB2_RCV);
 391                 // FIXME omap_cfg_reg(USB2_SPEED);
 392         } else {
 393                 pr_debug("usb%d cpu unrecognized\n", 1);
 394                 return 0;
 395         }
 396
 397         // omap_cfg_reg(USB2_SUSP);
 398
 399         switch (nwires) {
 400         case 2:
 401                 goto bad;
 402         case 3:
 403                 syscon1 = 2;
 404                 break;
 405         case 4:
 406                 syscon1 = 1;
 407                 break;
 408         case 5:
 409                 goto bad;
 410         case 6:
 411                 syscon1 = 3;
 412                 if (cpu_is_omap15xx()) {
 413                         omap_cfg_reg(USB2_VP);
 414                         omap_cfg_reg(USB2_VM);
 415                 } else {
 416                         u32 l;
 417
 418                         omap_cfg_reg(AA9_USB2_VP);
 419                         omap_cfg_reg(R9_USB2_VM);
 420                         l = omap_readl(USB_TRANSCEIVER_CTRL);
 421                         l |= CONF_USB2_UNI_R;
 422                         omap_writel(l, USB_TRANSCEIVER_CTRL);
 423                 }
 424                 break;
 425         default:
 426 bad:
 427                 printk(KERN_ERR "illegal usb%d %d-wire transceiver\n",
 428                         2, nwires);
 429         }
 430
 431         return syscon1 << 24;
 432 }
 433
 434 #ifdef  CONFIG_ARCH_OMAP15XX
 435
 436 /* ULPD_DPLL_CTRL */
 437 #define DPLL_IOB                (1 << 13)
 438 #define DPLL_PLL_ENABLE         (1 << 4)
 439 #define DPLL_LOCK               (1 << 0)
 440
 441 /* ULPD_APLL_CTRL */
 442 #define APLL_NDPLL_SWITCH       (1 << 0)
 443
 444 static void __init omap_1510_usb_init(struct omap_usb_config *config)
 445 {
 446         unsigned int val;
 447         u16 w;
 448
 449         config->usb0_init(config->pins[0], is_usb0_device(config));
 450         config->usb1_init(config->pins[1]);
 451         config->usb2_init(config->pins[2], 0);
 452
 453         val = omap_readl(MOD_CONF_CTRL_0) & ~(0x3f << 1);
 454         val |= (config->hmc_mode << 1);
 455         omap_writel(val, MOD_CONF_CTRL_0);
 456
 457         printk("USB: hmc %d", config->hmc_mode);
 458         if (config->pins[0])
 459                 printk(", usb0 %d wires%s", config->pins[0],
 460                         is_usb0_device(config) ? " (dev)" : "");
 461         if (config->pins[1])
 462                 printk(", usb1 %d wires", config->pins[1]);
 463         if (config->pins[2])
 464                 printk(", usb2 %d wires", config->pins[2]);
 465         printk("\n");
 466
 467         /* use DPLL for 48 MHz function clock */
 468         pr_debug("APLL %04x DPLL %04x REQ %04x\n", omap_readw(ULPD_APLL_CTRL),
 469                         omap_readw(ULPD_DPLL_CTRL), omap_readw(ULPD_SOFT_REQ));
 470
 471         w = omap_readw(ULPD_APLL_CTRL);
 472         w &= ~APLL_NDPLL_SWITCH;
 473         omap_writew(w, ULPD_APLL_CTRL);
 474
 475         w = omap_readw(ULPD_DPLL_CTRL);
 476         w |= DPLL_IOB | DPLL_PLL_ENABLE;
 477         omap_writew(w, ULPD_DPLL_CTRL);
 478
 479         w = omap_readw(ULPD_SOFT_REQ);
 480         w |= SOFT_UDC_REQ | SOFT_DPLL_REQ;
 481         omap_writew(w, ULPD_SOFT_REQ);
 482
 483         while (!(omap_readw(ULPD_DPLL_CTRL) & DPLL_LOCK))
 484                 cpu_relax();
 485
 486 #ifdef  CONFIG_USB_GADGET_OMAP
 487         if (config->register_dev) {
 488                 int status;
 489
 490                 udc_device.dev.platform_data = config;
 491                 status = platform_device_register(&udc_device);
 492                 if (status)
 493                         pr_debug("can't register UDC device, %d\n", status);
 494                 /* udc driver gates 48MHz by D+ pullup */
 495         }
 496 #endif
 497
 498 #if     defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE)
 499         if (config->register_host) {
 500                 int status;
 501
 502                 ohci_device.dev.platform_data = config;
 503                 status = platform_device_register(&ohci_device);
 504                 if (status)
 505                         pr_debug("can't register OHCI device, %d\n", status);
 506                 /* hcd explicitly gates 48MHz */
 507         }
 508 #endif
 509 }
 510
 511 #else
 512 static inline void omap_1510_usb_init(struct omap_usb_config *config) {}
 513 #endif
 514
 515 void __init omap1_usb_init(struct omap_usb_config *pdata)
 516 {
 517         pdata->usb0_init = omap1_usb0_init;
 518         pdata->usb1_init = omap1_usb1_init;
 519         pdata->usb2_init = omap1_usb2_init;
 520         udc_device_init(pdata);
 521         ohci_device_init(pdata);
 522         otg_device_init(pdata);
 523
 524         if (cpu_is_omap7xx() || cpu_is_omap16xx())
 525                 omap_otg_init(pdata);
 526         else if (cpu_is_omap15xx())
 527                 omap_1510_usb_init(pdata);
 528         else
 529                 printk(KERN_ERR "USB: No init for your chip yet\n");
 530 }