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 #include "common.h"
  33
  34 /* These routines should handle the standard chip-specific modes
  35  * for usb0/1/2 ports, covering basic mux and transceiver setup.
  36  *
  37  * Some board-*.c files will need to set up additional mux options,
  38  * like for suspend handling, vbus sensing, GPIOs, and the D+ pullup.
  39  */
  40
  41 /* TESTED ON:
  42  *  - 1611B H2 (with usb1 mini-AB) using standard Mini-B or OTG cables
  43  *  - 5912 OSK OHCI (with usb0 standard-A), standard A-to-B cables
  44  *  - 5912 OSK UDC, with *nonstandard* A-to-A cable
  45  *  - 1510 Innovator UDC with bundled usb0 cable
  46  *  - 1510 Innovator OHCI with bundled usb1/usb2 cable
  47  *  - 1510 Innovator OHCI with custom usb0 cable, feeding 5V VBUS
  48  *  - 1710 custom development board using alternate pin group
  49  *  - 1710 H3 (with usb1 mini-AB) using standard Mini-B or OTG cables
  50  */
  51
  52 #define INT_USB_IRQ_GEN         IH2_BASE + 20
  53 #define INT_USB_IRQ_NISO        IH2_BASE + 30
  54 #define INT_USB_IRQ_ISO         IH2_BASE + 29
  55 #define INT_USB_IRQ_HGEN        INT_USB_HHC_1
  56 #define INT_USB_IRQ_OTG         IH2_BASE + 8
  57
  58 #ifdef  CONFIG_USB_GADGET_OMAP
  59
  60 static struct resource udc_resources[] = {
  61         /* order is significant! */
  62         {               /* registers */
  63                 .start          = UDC_BASE,
  64                 .end            = UDC_BASE + 0xff,
  65                 .flags          = IORESOURCE_MEM,
  66         }, {            /* general IRQ */
  67                 .start          = INT_USB_IRQ_GEN,
  68                 .flags          = IORESOURCE_IRQ,
  69         }, {            /* PIO IRQ */
  70                 .start          = INT_USB_IRQ_NISO,
  71                 .flags          = IORESOURCE_IRQ,
  72         }, {            /* SOF IRQ */
  73                 .start          = INT_USB_IRQ_ISO,
  74                 .flags          = IORESOURCE_IRQ,
  75         },
  76 };
  77
  78 static u64 udc_dmamask = ~(u32)0;
  79
  80 static struct platform_device udc_device = {
  81         .name           = "omap_udc",
  82         .id             = -1,
  83         .dev = {
  84                 .dma_mask               = &udc_dmamask,
  85                 .coherent_dma_mask      = 0xffffffff,
  86         },
  87         .num_resources  = ARRAY_SIZE(udc_resources),
  88         .resource       = udc_resources,
  89 };
  90
  91 static inline void udc_device_init(struct omap_usb_config *pdata)
  92 {
  93         /* IRQ numbers for omap7xx */
  94         if(cpu_is_omap7xx()) {
  95                 udc_resources[1].start = INT_7XX_USB_GENI;
  96                 udc_resources[2].start = INT_7XX_USB_NON_ISO;
  97                 udc_resources[3].start = INT_7XX_USB_ISO;
  98         }
  99         pdata->udc_device = &udc_device;
 100 }
 101
 102 #else
 103
 104 static inline void udc_device_init(struct omap_usb_config *pdata)
 105 {
 106 }
 107
 108 #endif
 109
 110 #if     defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE)
 111
 112 /* The dmamask must be set for OHCI to work */
 113 static u64 ohci_dmamask = ~(u32)0;
 114
 115 static struct resource ohci_resources[] = {
 116         {
 117                 .start  = OMAP_OHCI_BASE,
 118                 .end    = OMAP_OHCI_BASE + 0xff,
 119                 .flags  = IORESOURCE_MEM,
 120         },
 121         {
 122                 .start  = INT_USB_IRQ_HGEN,
 123                 .flags  = IORESOURCE_IRQ,
 124         },
 125 };
 126
 127 static struct platform_device ohci_device = {
 128         .name                   = "ohci",
 129         .id                     = -1,
 130         .dev = {
 131                 .dma_mask               = &ohci_dmamask,
 132                 .coherent_dma_mask      = 0xffffffff,
 133         },
 134         .num_resources  = ARRAY_SIZE(ohci_resources),
 135         .resource               = ohci_resources,
 136 };
 137
 138 static inline void ohci_device_init(struct omap_usb_config *pdata)
 139 {
 140         if (cpu_is_omap7xx())
 141                 ohci_resources[1].start = INT_7XX_USB_HHC_1;
 142         pdata->ohci_device = &ohci_device;
 143         pdata->ocpi_enable = &ocpi_enable;
 144 }
 145
 146 #else
 147
 148 static inline void ohci_device_init(struct omap_usb_config *pdata)
 149 {
 150 }
 151
 152 #endif
 153
 154 #if     defined(CONFIG_USB_OTG) && defined(CONFIG_ARCH_OMAP_OTG)
 155
 156 static struct resource otg_resources[] = {
 157         /* order is significant! */
 158         {
 159                 .start          = OTG_BASE,
 160                 .end            = OTG_BASE + 0xff,
 161                 .flags          = IORESOURCE_MEM,
 162         }, {
 163                 .start          = INT_USB_IRQ_OTG,
 164                 .flags          = IORESOURCE_IRQ,
 165         },
 166 };
 167
 168 static struct platform_device otg_device = {
 169         .name           = "omap_otg",
 170         .id             = -1,
 171         .num_resources  = ARRAY_SIZE(otg_resources),
 172         .resource       = otg_resources,
 173 };
 174
 175 static inline void otg_device_init(struct omap_usb_config *pdata)
 176 {
 177         if (cpu_is_omap7xx())
 178                 otg_resources[1].start = INT_7XX_USB_OTG;
 179         pdata->otg_device = &otg_device;
 180 }
 181
 182 #else
 183
 184 static inline void otg_device_init(struct omap_usb_config *pdata)
 185 {
 186 }
 187
 188 #endif
 189
 190 u32 __init omap1_usb0_init(unsigned nwires, unsigned is_device)
 191 {
 192         u32     syscon1 = 0;
 193
 194         if (nwires == 0) {
 195                 if (!cpu_is_omap15xx()) {
 196                         u32 l;
 197
 198                         /* pulldown D+/D- */
 199                         l = omap_readl(USB_TRANSCEIVER_CTRL);
 200                         l &= ~(3 << 1);
 201                         omap_writel(l, USB_TRANSCEIVER_CTRL);
 202                 }
 203                 return 0;
 204         }
 205
 206         if (is_device) {
 207                 if (cpu_is_omap7xx()) {
 208                         omap_cfg_reg(AA17_7XX_USB_DM);
 209                         omap_cfg_reg(W16_7XX_USB_PU_EN);
 210                         omap_cfg_reg(W17_7XX_USB_VBUSI);
 211                         omap_cfg_reg(W18_7XX_USB_DMCK_OUT);
 212                         omap_cfg_reg(W19_7XX_USB_DCRST);
 213                 } else
 214                         omap_cfg_reg(W4_USB_PUEN);
 215         }
 216
 217         if (nwires == 2) {
 218                 u32 l;
 219
 220                 // omap_cfg_reg(P9_USB_DP);
 221                 // omap_cfg_reg(R8_USB_DM);
 222
 223                 if (cpu_is_omap15xx()) {
 224                         /* This works on 1510-Innovator */
 225                         return 0;
 226                 }
 227
 228                 /* NOTES:
 229                  *  - peripheral should configure VBUS detection!
 230                  *  - only peripherals may use the internal D+/D- pulldowns
 231                  *  - OTG support on this port not yet written
 232                  */
 233
 234                 /* Don't do this for omap7xx -- it causes USB to not work correctly */
 235                 if (!cpu_is_omap7xx()) {
 236                         l = omap_readl(USB_TRANSCEIVER_CTRL);
 237                         l &= ~(7 << 4);
 238                         if (!is_device)
 239                                 l |= (3 << 1);
 240                         omap_writel(l, USB_TRANSCEIVER_CTRL);
 241                 }
 242
 243                 return 3 << 16;
 244         }
 245
 246         /* alternate pin config, external transceiver */
 247         if (cpu_is_omap15xx()) {
 248                 printk(KERN_ERR "no usb0 alt pin config on 15xx\n");
 249                 return 0;
 250         }
 251
 252         omap_cfg_reg(V6_USB0_TXD);
 253         omap_cfg_reg(W9_USB0_TXEN);
 254         omap_cfg_reg(W5_USB0_SE0);
 255         if (nwires != 3)
 256                 omap_cfg_reg(Y5_USB0_RCV);
 257
 258         /* NOTE:  SPEED and SUSP aren't configured here.  OTG hosts
 259          * may be able to use I2C requests to set those bits along
 260          * with VBUS switching and overcurrent detection.
 261          */
 262
 263         if (nwires != 6) {
 264                 u32 l;
 265
 266                 l = omap_readl(USB_TRANSCEIVER_CTRL);
 267                 l &= ~CONF_USB2_UNI_R;
 268                 omap_writel(l, USB_TRANSCEIVER_CTRL);
 269         }
 270
 271         switch (nwires) {
 272         case 3:
 273                 syscon1 = 2;
 274                 break;
 275         case 4:
 276                 syscon1 = 1;
 277                 break;
 278         case 6:
 279                 syscon1 = 3;
 280                 {
 281                         u32 l;
 282
 283                         omap_cfg_reg(AA9_USB0_VP);
 284                         omap_cfg_reg(R9_USB0_VM);
 285                         l = omap_readl(USB_TRANSCEIVER_CTRL);
 286                         l |= CONF_USB2_UNI_R;
 287                         omap_writel(l, USB_TRANSCEIVER_CTRL);
 288                 }
 289                 break;
 290         default:
 291                 printk(KERN_ERR "illegal usb%d %d-wire transceiver\n",
 292                         0, nwires);
 293         }
 294
 295         return syscon1 << 16;
 296 }
 297
 298 u32 __init omap1_usb1_init(unsigned nwires)
 299 {
 300         u32     syscon1 = 0;
 301
 302         if (!cpu_is_omap15xx() && nwires != 6) {
 303                 u32 l;
 304
 305                 l = omap_readl(USB_TRANSCEIVER_CTRL);
 306                 l &= ~CONF_USB1_UNI_R;
 307                 omap_writel(l, USB_TRANSCEIVER_CTRL);
 308         }
 309         if (nwires == 0)
 310                 return 0;
 311
 312         /* external transceiver */
 313         omap_cfg_reg(USB1_TXD);
 314         omap_cfg_reg(USB1_TXEN);
 315         if (nwires != 3)
 316                 omap_cfg_reg(USB1_RCV);
 317
 318         if (cpu_is_omap15xx()) {
 319                 omap_cfg_reg(USB1_SEO);
 320                 omap_cfg_reg(USB1_SPEED);
 321                 // SUSP
 322         } else if (cpu_is_omap1610() || cpu_is_omap5912()) {
 323                 omap_cfg_reg(W13_1610_USB1_SE0);
 324                 omap_cfg_reg(R13_1610_USB1_SPEED);
 325                 // SUSP
 326         } else if (cpu_is_omap1710()) {
 327                 omap_cfg_reg(R13_1710_USB1_SE0);
 328                 // SUSP
 329         } else {
 330                 pr_debug("usb%d cpu unrecognized\n", 1);
 331                 return 0;
 332         }
 333
 334         switch (nwires) {
 335         case 2:
 336                 goto bad;
 337         case 3:
 338                 syscon1 = 2;
 339                 break;
 340         case 4:
 341                 syscon1 = 1;
 342                 break;
 343         case 6:
 344                 syscon1 = 3;
 345                 omap_cfg_reg(USB1_VP);
 346                 omap_cfg_reg(USB1_VM);
 347                 if (!cpu_is_omap15xx()) {
 348                         u32 l;
 349
 350                         l = omap_readl(USB_TRANSCEIVER_CTRL);
 351                         l |= CONF_USB1_UNI_R;
 352                         omap_writel(l, USB_TRANSCEIVER_CTRL);
 353                 }
 354                 break;
 355         default:
 356 bad:
 357                 printk(KERN_ERR "illegal usb%d %d-wire transceiver\n",
 358                         1, nwires);
 359         }
 360
 361         return syscon1 << 20;
 362 }
 363
 364 u32 __init omap1_usb2_init(unsigned nwires, unsigned alt_pingroup)
 365 {
 366         u32     syscon1 = 0;
 367
 368         /* NOTE omap1 erratum: must leave USB2_UNI_R set if usb0 in use */
 369         if (alt_pingroup || nwires == 0)
 370                 return 0;
 371
 372         if (!cpu_is_omap15xx() && nwires != 6) {
 373                 u32 l;
 374
 375                 l = omap_readl(USB_TRANSCEIVER_CTRL);
 376                 l &= ~CONF_USB2_UNI_R;
 377                 omap_writel(l, USB_TRANSCEIVER_CTRL);
 378         }
 379
 380         /* external transceiver */
 381         if (cpu_is_omap15xx()) {
 382                 omap_cfg_reg(USB2_TXD);
 383                 omap_cfg_reg(USB2_TXEN);
 384                 omap_cfg_reg(USB2_SEO);
 385                 if (nwires != 3)
 386                         omap_cfg_reg(USB2_RCV);
 387                 /* there is no USB2_SPEED */
 388         } else if (cpu_is_omap16xx()) {
 389                 omap_cfg_reg(V6_USB2_TXD);
 390                 omap_cfg_reg(W9_USB2_TXEN);
 391                 omap_cfg_reg(W5_USB2_SE0);
 392                 if (nwires != 3)
 393                         omap_cfg_reg(Y5_USB2_RCV);
 394                 // FIXME omap_cfg_reg(USB2_SPEED);
 395         } else {
 396                 pr_debug("usb%d cpu unrecognized\n", 1);
 397                 return 0;
 398         }
 399
 400         // omap_cfg_reg(USB2_SUSP);
 401
 402         switch (nwires) {
 403         case 2:
 404                 goto bad;
 405         case 3:
 406                 syscon1 = 2;
 407                 break;
 408         case 4:
 409                 syscon1 = 1;
 410                 break;
 411         case 5:
 412                 goto bad;
 413         case 6:
 414                 syscon1 = 3;
 415                 if (cpu_is_omap15xx()) {
 416                         omap_cfg_reg(USB2_VP);
 417                         omap_cfg_reg(USB2_VM);
 418                 } else {
 419                         u32 l;
 420
 421                         omap_cfg_reg(AA9_USB2_VP);
 422                         omap_cfg_reg(R9_USB2_VM);
 423                         l = omap_readl(USB_TRANSCEIVER_CTRL);
 424                         l |= CONF_USB2_UNI_R;
 425                         omap_writel(l, USB_TRANSCEIVER_CTRL);
 426                 }
 427                 break;
 428         default:
 429 bad:
 430                 printk(KERN_ERR "illegal usb%d %d-wire transceiver\n",
 431                         2, nwires);
 432         }
 433
 434         return syscon1 << 24;
 435 }
 436
 437 #ifdef  CONFIG_ARCH_OMAP15XX
 438
 439 /* ULPD_DPLL_CTRL */
 440 #define DPLL_IOB                (1 << 13)
 441 #define DPLL_PLL_ENABLE         (1 << 4)
 442 #define DPLL_LOCK               (1 << 0)
 443
 444 /* ULPD_APLL_CTRL */
 445 #define APLL_NDPLL_SWITCH       (1 << 0)
 446
 447 static void __init omap_1510_usb_init(struct omap_usb_config *config)
 448 {
 449         unsigned int val;
 450         u16 w;
 451
 452         config->usb0_init(config->pins[0], is_usb0_device(config));
 453         config->usb1_init(config->pins[1]);
 454         config->usb2_init(config->pins[2], 0);
 455
 456         val = omap_readl(MOD_CONF_CTRL_0) & ~(0x3f << 1);
 457         val |= (config->hmc_mode << 1);
 458         omap_writel(val, MOD_CONF_CTRL_0);
 459
 460         printk("USB: hmc %d", config->hmc_mode);
 461         if (config->pins[0])
 462                 printk(", usb0 %d wires%s", config->pins[0],
 463                         is_usb0_device(config) ? " (dev)" : "");
 464         if (config->pins[1])
 465                 printk(", usb1 %d wires", config->pins[1]);
 466         if (config->pins[2])
 467                 printk(", usb2 %d wires", config->pins[2]);
 468         printk("\n");
 469
 470         /* use DPLL for 48 MHz function clock */
 471         pr_debug("APLL %04x DPLL %04x REQ %04x\n", omap_readw(ULPD_APLL_CTRL),
 472                         omap_readw(ULPD_DPLL_CTRL), omap_readw(ULPD_SOFT_REQ));
 473
 474         w = omap_readw(ULPD_APLL_CTRL);
 475         w &= ~APLL_NDPLL_SWITCH;
 476         omap_writew(w, ULPD_APLL_CTRL);
 477
 478         w = omap_readw(ULPD_DPLL_CTRL);
 479         w |= DPLL_IOB | DPLL_PLL_ENABLE;
 480         omap_writew(w, ULPD_DPLL_CTRL);
 481
 482         w = omap_readw(ULPD_SOFT_REQ);
 483         w |= SOFT_UDC_REQ | SOFT_DPLL_REQ;
 484         omap_writew(w, ULPD_SOFT_REQ);
 485
 486         while (!(omap_readw(ULPD_DPLL_CTRL) & DPLL_LOCK))
 487                 cpu_relax();
 488
 489 #ifdef  CONFIG_USB_GADGET_OMAP
 490         if (config->register_dev) {
 491                 int status;
 492
 493                 udc_device.dev.platform_data = config;
 494                 status = platform_device_register(&udc_device);
 495                 if (status)
 496                         pr_debug("can't register UDC device, %d\n", status);
 497                 /* udc driver gates 48MHz by D+ pullup */
 498         }
 499 #endif
 500
 501 #if     defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE)
 502         if (config->register_host) {
 503                 int status;
 504
 505                 ohci_device.dev.platform_data = config;
 506                 status = platform_device_register(&ohci_device);
 507                 if (status)
 508                         pr_debug("can't register OHCI device, %d\n", status);
 509                 /* hcd explicitly gates 48MHz */
 510         }
 511 #endif
 512 }
 513
 514 #else
 515 static inline void omap_1510_usb_init(struct omap_usb_config *config) {}
 516 #endif
 517
 518 void __init omap1_usb_init(struct omap_usb_config *pdata)
 519 {
 520         pdata->usb0_init = omap1_usb0_init;
 521         pdata->usb1_init = omap1_usb1_init;
 522         pdata->usb2_init = omap1_usb2_init;
 523         udc_device_init(pdata);
 524         ohci_device_init(pdata);
 525         otg_device_init(pdata);
 526
 527         if (cpu_is_omap7xx() || cpu_is_omap16xx())
 528                 omap_otg_init(pdata);
 529         else if (cpu_is_omap15xx())
 530                 omap_1510_usb_init(pdata);
 531         else
 532                 printk(KERN_ERR "USB: No init for your chip yet\n");
 533 }