arch/arm/mach-omap2/board-n8x0.c

   1 /*
   2  * linux/arch/arm/mach-omap2/board-n8x0.c
   3  *
   4  * Copyright (C) 2005-2009 Nokia Corporation
   5  * Author: Juha Yrjola <juha.yrjola@nokia.com>
   6  *
   7  * Modified from mach-omap2/board-generic.c
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  */
  13
  14 #include <linux/clk.h>
  15 #include <linux/delay.h>
  16 #include <linux/gpio.h>
  17 #include <linux/init.h>
  18 #include <linux/io.h>
  19 #include <linux/irq.h>
  20 #include <linux/stddef.h>
  21 #include <linux/i2c.h>
  22 #include <linux/spi/spi.h>
  23 #include <linux/usb/musb.h>
  24 #include <linux/mmc/host.h>
  25 #include <linux/platform_data/spi-omap2-mcspi.h>
  26 #include <linux/platform_data/mmc-omap.h>
  27 #include <linux/mfd/menelaus.h>
  28 #include <sound/tlv320aic3x.h>
  29
  30 #include <asm/mach/arch.h>
  31 #include <asm/mach-types.h>
  32
  33 #include "common.h"
  34 #include "mmc.h"
  35 #include "soc.h"
  36 #include "common-board-devices.h"
  37
  38 #define TUSB6010_ASYNC_CS       1
  39 #define TUSB6010_SYNC_CS        4
  40 #define TUSB6010_GPIO_INT       58
  41 #define TUSB6010_GPIO_ENABLE    0
  42 #define TUSB6010_DMACHAN        0x3f
  43
  44 #define NOKIA_N810_WIMAX        (1 << 2)
  45 #define NOKIA_N810              (1 << 1)
  46 #define NOKIA_N800              (1 << 0)
  47
  48 static u32 board_caps;
  49
  50 #define board_is_n800()         (board_caps & NOKIA_N800)
  51 #define board_is_n810()         (board_caps & NOKIA_N810)
  52 #define board_is_n810_wimax()   (board_caps & NOKIA_N810_WIMAX)
  53
  54 static void board_check_revision(void)
  55 {
  56         if (of_have_populated_dt()) {
  57                 if (of_machine_is_compatible("nokia,n800"))
  58                         board_caps = NOKIA_N800;
  59                 else if (of_machine_is_compatible("nokia,n810"))
  60                         board_caps = NOKIA_N810;
  61                 else if (of_machine_is_compatible("nokia,n810-wimax"))
  62                         board_caps = NOKIA_N810_WIMAX;
  63         }
  64
  65         if (!board_caps)
  66                 pr_err("Unknown board\n");
  67 }
  68
  69 #if defined(CONFIG_USB_MUSB_TUSB6010) || defined(CONFIG_USB_MUSB_TUSB6010_MODULE)
  70 /*
  71  * Enable or disable power to TUSB6010. When enabling, turn on 3.3 V and
  72  * 1.5 V voltage regulators of PM companion chip. Companion chip will then
  73  * provide then PGOOD signal to TUSB6010 which will release it from reset.
  74  */
  75 static int tusb_set_power(int state)
  76 {
  77         int i, retval = 0;
  78
  79         if (state) {
  80                 gpio_set_value(TUSB6010_GPIO_ENABLE, 1);
  81                 msleep(1);
  82
  83                 /* Wait until TUSB6010 pulls INT pin down */
  84                 i = 100;
  85                 while (i && gpio_get_value(TUSB6010_GPIO_INT)) {
  86                         msleep(1);
  87                         i--;
  88                 }
  89
  90                 if (!i) {
  91                         printk(KERN_ERR "tusb: powerup failed\n");
  92                         retval = -ENODEV;
  93                 }
  94         } else {
  95                 gpio_set_value(TUSB6010_GPIO_ENABLE, 0);
  96                 msleep(10);
  97         }
  98
  99         return retval;
 100 }
 101
 102 static struct musb_hdrc_config musb_config = {
 103         .multipoint     = 1,
 104         .dyn_fifo       = 1,
 105         .num_eps        = 16,
 106         .ram_bits       = 12,
 107 };
 108
 109 static struct musb_hdrc_platform_data tusb_data = {
 110         .mode           = MUSB_OTG,
 111         .set_power      = tusb_set_power,
 112         .min_power      = 25,   /* x2 = 50 mA drawn from VBUS as peripheral */
 113         .power          = 100,  /* Max 100 mA VBUS for host mode */
 114         .config         = &musb_config,
 115 };
 116
 117 static void __init n8x0_usb_init(void)
 118 {
 119         int ret = 0;
 120         static char     announce[] __initdata = KERN_INFO "TUSB 6010\n";
 121
 122         /* PM companion chip power control pin */
 123         ret = gpio_request_one(TUSB6010_GPIO_ENABLE, GPIOF_OUT_INIT_LOW,
 124                                "TUSB6010 enable");
 125         if (ret != 0) {
 126                 printk(KERN_ERR "Could not get TUSB power GPIO%i\n",
 127                        TUSB6010_GPIO_ENABLE);
 128                 return;
 129         }
 130         tusb_set_power(0);
 131
 132         ret = tusb6010_setup_interface(&tusb_data, TUSB6010_REFCLK_19, 2,
 133                                         TUSB6010_ASYNC_CS, TUSB6010_SYNC_CS,
 134                                         TUSB6010_GPIO_INT, TUSB6010_DMACHAN);
 135         if (ret != 0)
 136                 goto err;
 137
 138         printk(announce);
 139
 140         return;
 141
 142 err:
 143         gpio_free(TUSB6010_GPIO_ENABLE);
 144 }
 145 #else
 146
 147 static void __init n8x0_usb_init(void) {}
 148
 149 #endif /*CONFIG_USB_MUSB_TUSB6010 */
 150
 151
 152 static struct omap2_mcspi_device_config p54spi_mcspi_config = {
 153         .turbo_mode     = 0,
 154 };
 155
 156 static struct spi_board_info n800_spi_board_info[] __initdata = {
 157         {
 158                 .modalias       = "p54spi",
 159                 .bus_num        = 2,
 160                 .chip_select    = 0,
 161                 .max_speed_hz   = 48000000,
 162                 .controller_data = &p54spi_mcspi_config,
 163         },
 164 };
 165
 166 #if defined(CONFIG_MENELAUS) &&                                         \
 167         (defined(CONFIG_MMC_OMAP) || defined(CONFIG_MMC_OMAP_MODULE))
 168
 169 /*
 170  * On both N800 and N810, only the first of the two MMC controllers is in use.
 171  * The two MMC slots are multiplexed via Menelaus companion chip over I2C.
 172  * On N800, both slots are powered via Menelaus. On N810, only one of the
 173  * slots is powered via Menelaus. The N810 EMMC is powered via GPIO.
 174  *
 175  * VMMC                         slot 1 on both N800 and N810
 176  * VDCDC3_APE and VMCS2_APE     slot 2 on N800
 177  * GPIO23 and GPIO9             slot 2 EMMC on N810
 178  *
 179  */
 180 #define N8X0_SLOT_SWITCH_GPIO   96
 181 #define N810_EMMC_VSD_GPIO      23
 182 #define N810_EMMC_VIO_GPIO      9
 183
 184 static int slot1_cover_open;
 185 static int slot2_cover_open;
 186 static struct device *mmc_device;
 187
 188 static int n8x0_mmc_switch_slot(struct device *dev, int slot)
 189 {
 190 #ifdef CONFIG_MMC_DEBUG
 191         dev_dbg(dev, "Choose slot %d\n", slot + 1);
 192 #endif
 193         gpio_set_value(N8X0_SLOT_SWITCH_GPIO, slot);
 194         return 0;
 195 }
 196
 197 static int n8x0_mmc_set_power_menelaus(struct device *dev, int slot,
 198                                         int power_on, int vdd)
 199 {
 200         int mV;
 201
 202 #ifdef CONFIG_MMC_DEBUG
 203         dev_dbg(dev, "Set slot %d power: %s (vdd %d)\n", slot + 1,
 204                 power_on ? "on" : "off", vdd);
 205 #endif
 206         if (slot == 0) {
 207                 if (!power_on)
 208                         return menelaus_set_vmmc(0);
 209                 switch (1 << vdd) {
 210                 case MMC_VDD_33_34:
 211                 case MMC_VDD_32_33:
 212                 case MMC_VDD_31_32:
 213                         mV = 3100;
 214                         break;
 215                 case MMC_VDD_30_31:
 216                         mV = 3000;
 217                         break;
 218                 case MMC_VDD_28_29:
 219                         mV = 2800;
 220                         break;
 221                 case MMC_VDD_165_195:
 222                         mV = 1850;
 223                         break;
 224                 default:
 225                         BUG();
 226                 }
 227                 return menelaus_set_vmmc(mV);
 228         } else {
 229                 if (!power_on)
 230                         return menelaus_set_vdcdc(3, 0);
 231                 switch (1 << vdd) {
 232                 case MMC_VDD_33_34:
 233                 case MMC_VDD_32_33:
 234                         mV = 3300;
 235                         break;
 236                 case MMC_VDD_30_31:
 237                 case MMC_VDD_29_30:
 238                         mV = 3000;
 239                         break;
 240                 case MMC_VDD_28_29:
 241                 case MMC_VDD_27_28:
 242                         mV = 2800;
 243                         break;
 244                 case MMC_VDD_24_25:
 245                 case MMC_VDD_23_24:
 246                         mV = 2400;
 247                         break;
 248                 case MMC_VDD_22_23:
 249                 case MMC_VDD_21_22:
 250                         mV = 2200;
 251                         break;
 252                 case MMC_VDD_20_21:
 253                         mV = 2000;
 254                         break;
 255                 case MMC_VDD_165_195:
 256                         mV = 1800;
 257                         break;
 258                 default:
 259                         BUG();
 260                 }
 261                 return menelaus_set_vdcdc(3, mV);
 262         }
 263         return 0;
 264 }
 265
 266 static void n810_set_power_emmc(struct device *dev,
 267                                          int power_on)
 268 {
 269         dev_dbg(dev, "Set EMMC power %s\n", power_on ? "on" : "off");
 270
 271         if (power_on) {
 272                 gpio_set_value(N810_EMMC_VSD_GPIO, 1);
 273                 msleep(1);
 274                 gpio_set_value(N810_EMMC_VIO_GPIO, 1);
 275                 msleep(1);
 276         } else {
 277                 gpio_set_value(N810_EMMC_VIO_GPIO, 0);
 278                 msleep(50);
 279                 gpio_set_value(N810_EMMC_VSD_GPIO, 0);
 280                 msleep(50);
 281         }
 282 }
 283
 284 static int n8x0_mmc_set_power(struct device *dev, int slot, int power_on,
 285                               int vdd)
 286 {
 287         if (board_is_n800() || slot == 0)
 288                 return n8x0_mmc_set_power_menelaus(dev, slot, power_on, vdd);
 289
 290         n810_set_power_emmc(dev, power_on);
 291
 292         return 0;
 293 }
 294
 295 static int n8x0_mmc_set_bus_mode(struct device *dev, int slot, int bus_mode)
 296 {
 297         int r;
 298
 299         dev_dbg(dev, "Set slot %d bus mode %s\n", slot + 1,
 300                 bus_mode == MMC_BUSMODE_OPENDRAIN ? "open-drain" : "push-pull");
 301         BUG_ON(slot != 0 && slot != 1);
 302         slot++;
 303         switch (bus_mode) {
 304         case MMC_BUSMODE_OPENDRAIN:
 305                 r = menelaus_set_mmc_opendrain(slot, 1);
 306                 break;
 307         case MMC_BUSMODE_PUSHPULL:
 308                 r = menelaus_set_mmc_opendrain(slot, 0);
 309                 break;
 310         default:
 311                 BUG();
 312         }
 313         if (r != 0 && printk_ratelimit())
 314                 dev_err(dev, "MMC: unable to set bus mode for slot %d\n",
 315                         slot);
 316         return r;
 317 }
 318
 319 static int n8x0_mmc_get_cover_state(struct device *dev, int slot)
 320 {
 321         slot++;
 322         BUG_ON(slot != 1 && slot != 2);
 323         if (slot == 1)
 324                 return slot1_cover_open;
 325         else
 326                 return slot2_cover_open;
 327 }
 328
 329 static void n8x0_mmc_callback(void *data, u8 card_mask)
 330 {
 331         int bit, *openp, index;
 332
 333         if (board_is_n800()) {
 334                 bit = 1 << 1;
 335                 openp = &slot2_cover_open;
 336                 index = 1;
 337         } else {
 338                 bit = 1;
 339                 openp = &slot1_cover_open;
 340                 index = 0;
 341         }
 342
 343         if (card_mask & bit)
 344                 *openp = 1;
 345         else
 346                 *openp = 0;
 347
 348 #ifdef CONFIG_MMC_OMAP
 349         omap_mmc_notify_cover_event(mmc_device, index, *openp);
 350 #else
 351         pr_warn("MMC: notify cover event not available\n");
 352 #endif
 353 }
 354
 355 static int n8x0_mmc_late_init(struct device *dev)
 356 {
 357         int r, bit, *openp;
 358         int vs2sel;
 359
 360         mmc_device = dev;
 361
 362         r = menelaus_set_slot_sel(1);
 363         if (r < 0)
 364                 return r;
 365
 366         if (board_is_n800())
 367                 vs2sel = 0;
 368         else
 369                 vs2sel = 2;
 370
 371         r = menelaus_set_mmc_slot(2, 0, vs2sel, 1);
 372         if (r < 0)
 373                 return r;
 374
 375         n8x0_mmc_set_power(dev, 0, MMC_POWER_ON, 16); /* MMC_VDD_28_29 */
 376         n8x0_mmc_set_power(dev, 1, MMC_POWER_ON, 16);
 377
 378         r = menelaus_set_mmc_slot(1, 1, 0, 1);
 379         if (r < 0)
 380                 return r;
 381         r = menelaus_set_mmc_slot(2, 1, vs2sel, 1);
 382         if (r < 0)
 383                 return r;
 384
 385         r = menelaus_get_slot_pin_states();
 386         if (r < 0)
 387                 return r;
 388
 389         if (board_is_n800()) {
 390                 bit = 1 << 1;
 391                 openp = &slot2_cover_open;
 392         } else {
 393                 bit = 1;
 394                 openp = &slot1_cover_open;
 395                 slot2_cover_open = 0;
 396         }
 397
 398         /* All slot pin bits seem to be inversed until first switch change */
 399         if (r == 0xf || r == (0xf & ~bit))
 400                 r = ~r;
 401
 402         if (r & bit)
 403                 *openp = 1;
 404         else
 405                 *openp = 0;
 406
 407         r = menelaus_register_mmc_callback(n8x0_mmc_callback, NULL);
 408
 409         return r;
 410 }
 411
 412 static void n8x0_mmc_shutdown(struct device *dev)
 413 {
 414         int vs2sel;
 415
 416         if (board_is_n800())
 417                 vs2sel = 0;
 418         else
 419                 vs2sel = 2;
 420
 421         menelaus_set_mmc_slot(1, 0, 0, 0);
 422         menelaus_set_mmc_slot(2, 0, vs2sel, 0);
 423 }
 424
 425 static void n8x0_mmc_cleanup(struct device *dev)
 426 {
 427         menelaus_unregister_mmc_callback();
 428
 429         gpio_free(N8X0_SLOT_SWITCH_GPIO);
 430
 431         if (board_is_n810()) {
 432                 gpio_free(N810_EMMC_VSD_GPIO);
 433                 gpio_free(N810_EMMC_VIO_GPIO);
 434         }
 435 }
 436
 437 /*
 438  * MMC controller1 has two slots that are multiplexed via I2C.
 439  * MMC controller2 is not in use.
 440  */
 441 static struct omap_mmc_platform_data mmc1_data = {
 442         .nr_slots                       = 0,
 443         .switch_slot                    = n8x0_mmc_switch_slot,
 444         .init                           = n8x0_mmc_late_init,
 445         .cleanup                        = n8x0_mmc_cleanup,
 446         .shutdown                       = n8x0_mmc_shutdown,
 447         .max_freq                       = 24000000,
 448         .slots[0] = {
 449                 .wires                  = 4,
 450                 .set_power              = n8x0_mmc_set_power,
 451                 .set_bus_mode           = n8x0_mmc_set_bus_mode,
 452                 .get_cover_state        = n8x0_mmc_get_cover_state,
 453                 .ocr_mask               = MMC_VDD_165_195 | MMC_VDD_30_31 |
 454                                                 MMC_VDD_32_33   | MMC_VDD_33_34,
 455                 .name                   = "internal",
 456         },
 457         .slots[1] = {
 458                 .set_power              = n8x0_mmc_set_power,
 459                 .set_bus_mode           = n8x0_mmc_set_bus_mode,
 460                 .get_cover_state        = n8x0_mmc_get_cover_state,
 461                 .ocr_mask               = MMC_VDD_165_195 | MMC_VDD_20_21 |
 462                                                 MMC_VDD_21_22 | MMC_VDD_22_23 |
 463                                                 MMC_VDD_23_24 | MMC_VDD_24_25 |
 464                                                 MMC_VDD_27_28 | MMC_VDD_28_29 |
 465                                                 MMC_VDD_29_30 | MMC_VDD_30_31 |
 466                                                 MMC_VDD_32_33 | MMC_VDD_33_34,
 467                 .name                   = "external",
 468         },
 469 };
 470
 471 static struct omap_mmc_platform_data *mmc_data[OMAP24XX_NR_MMC];
 472
 473 static struct gpio n810_emmc_gpios[] __initdata = {
 474         { N810_EMMC_VSD_GPIO, GPIOF_OUT_INIT_LOW,  "MMC slot 2 Vddf" },
 475         { N810_EMMC_VIO_GPIO, GPIOF_OUT_INIT_LOW,  "MMC slot 2 Vdd"  },
 476 };
 477
 478 static void __init n8x0_mmc_init(void)
 479 {
 480         int err;
 481
 482         if (board_is_n810()) {
 483                 mmc1_data.slots[0].name = "external";
 484
 485                 /*
 486                  * Some Samsung Movinand chips do not like open-ended
 487                  * multi-block reads and fall to braind-dead state
 488                  * while doing so. Reducing the number of blocks in
 489                  * the transfer or delays in clock disable do not help
 490                  */
 491                 mmc1_data.slots[1].name = "internal";
 492                 mmc1_data.slots[1].ban_openended = 1;
 493         }
 494
 495         err = gpio_request_one(N8X0_SLOT_SWITCH_GPIO, GPIOF_OUT_INIT_LOW,
 496                                "MMC slot switch");
 497         if (err)
 498                 return;
 499
 500         if (board_is_n810()) {
 501                 err = gpio_request_array(n810_emmc_gpios,
 502                                          ARRAY_SIZE(n810_emmc_gpios));
 503                 if (err) {
 504                         gpio_free(N8X0_SLOT_SWITCH_GPIO);
 505                         return;
 506                 }
 507         }
 508
 509         mmc1_data.nr_slots = 2;
 510         mmc_data[0] = &mmc1_data;
 511 }
 512 #else
 513 static struct omap_mmc_platform_data mmc1_data;
 514 void __init n8x0_mmc_init(void)
 515 {
 516 }
 517 #endif  /* CONFIG_MMC_OMAP */
 518
 519 #ifdef CONFIG_MENELAUS
 520
 521 static int n8x0_auto_sleep_regulators(void)
 522 {
 523         u32 val;
 524         int ret;
 525
 526         val = EN_VPLL_SLEEP | EN_VMMC_SLEEP    \
 527                 | EN_VAUX_SLEEP | EN_VIO_SLEEP \
 528                 | EN_VMEM_SLEEP | EN_DC3_SLEEP \
 529                 | EN_VC_SLEEP | EN_DC2_SLEEP;
 530
 531         ret = menelaus_set_regulator_sleep(1, val);
 532         if (ret < 0) {
 533                 pr_err("Could not set regulators to sleep on menelaus: %u\n",
 534                        ret);
 535                 return ret;
 536         }
 537         return 0;
 538 }
 539
 540 static int n8x0_auto_voltage_scale(void)
 541 {
 542         int ret;
 543
 544         ret = menelaus_set_vcore_hw(1400, 1050);
 545         if (ret < 0) {
 546                 pr_err("Could not set VCORE voltage on menelaus: %u\n", ret);
 547                 return ret;
 548         }
 549         return 0;
 550 }
 551
 552 static int n8x0_menelaus_late_init(struct device *dev)
 553 {
 554         int ret;
 555
 556         ret = n8x0_auto_voltage_scale();
 557         if (ret < 0)
 558                 return ret;
 559         ret = n8x0_auto_sleep_regulators();
 560         if (ret < 0)
 561                 return ret;
 562         return 0;
 563 }
 564
 565 #else
 566 static int n8x0_menelaus_late_init(struct device *dev)
 567 {
 568         return 0;
 569 }
 570 #endif
 571
 572 struct menelaus_platform_data n8x0_menelaus_platform_data __initdata = {
 573         .late_init = n8x0_menelaus_late_init,
 574 };
 575
 576 struct aic3x_pdata n810_aic33_data __initdata = {
 577         .gpio_reset = 118,
 578 };
 579
 580 static int __init n8x0_late_initcall(void)
 581 {
 582         if (!board_caps)
 583                 return -ENODEV;
 584
 585         n8x0_mmc_init();
 586         n8x0_usb_init();
 587
 588         return 0;
 589 }
 590 omap_late_initcall(n8x0_late_initcall);
 591
 592 /*
 593  * Legacy init pdata init for n8x0. Note that we want to follow the
 594  * I2C bus numbering starting at 0 for device tree like other omaps.
 595  */
 596 void * __init n8x0_legacy_init(void)
 597 {
 598         board_check_revision();
 599         spi_register_board_info(n800_spi_board_info,
 600                                 ARRAY_SIZE(n800_spi_board_info));
 601         return &mmc1_data;
 602 }