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