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_machine_is_compatible("nokia,n800"))
  57                 board_caps = NOKIA_N800;
  58         else if (of_machine_is_compatible("nokia,n810"))
  59                 board_caps = NOKIA_N810;
  60         else if (of_machine_is_compatible("nokia,n810-wimax"))
  61                 board_caps = NOKIA_N810_WIMAX;
  62
  63         if (!board_caps)
  64                 pr_err("Unknown board\n");
  65 }
  66
  67 #if IS_ENABLED(CONFIG_USB_MUSB_TUSB6010)
  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 const char announce[] __initconst = 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) && IS_ENABLED(CONFIG_MMC_OMAP)
 165
 166 /*
 167  * On both N800 and N810, only the first of the two MMC controllers is in use.
 168  * The two MMC slots are multiplexed via Menelaus companion chip over I2C.
 169  * On N800, both slots are powered via Menelaus. On N810, only one of the
 170  * slots is powered via Menelaus. The N810 EMMC is powered via GPIO.
 171  *
 172  * VMMC                         slot 1 on both N800 and N810
 173  * VDCDC3_APE and VMCS2_APE     slot 2 on N800
 174  * GPIO23 and GPIO9             slot 2 EMMC on N810
 175  *
 176  */
 177 #define N8X0_SLOT_SWITCH_GPIO   96
 178 #define N810_EMMC_VSD_GPIO      23
 179 #define N810_EMMC_VIO_GPIO      9
 180
 181 static int slot1_cover_open;
 182 static int slot2_cover_open;
 183 static struct device *mmc_device;
 184
 185 static int n8x0_mmc_switch_slot(struct device *dev, int slot)
 186 {
 187 #ifdef CONFIG_MMC_DEBUG
 188         dev_dbg(dev, "Choose slot %d\n", slot + 1);
 189 #endif
 190         gpio_set_value(N8X0_SLOT_SWITCH_GPIO, slot);
 191         return 0;
 192 }
 193
 194 static int n8x0_mmc_set_power_menelaus(struct device *dev, int slot,
 195                                         int power_on, int vdd)
 196 {
 197         int mV;
 198
 199 #ifdef CONFIG_MMC_DEBUG
 200         dev_dbg(dev, "Set slot %d power: %s (vdd %d)\n", slot + 1,
 201                 power_on ? "on" : "off", vdd);
 202 #endif
 203         if (slot == 0) {
 204                 if (!power_on)
 205                         return menelaus_set_vmmc(0);
 206                 switch (1 << vdd) {
 207                 case MMC_VDD_33_34:
 208                 case MMC_VDD_32_33:
 209                 case MMC_VDD_31_32:
 210                         mV = 3100;
 211                         break;
 212                 case MMC_VDD_30_31:
 213                         mV = 3000;
 214                         break;
 215                 case MMC_VDD_28_29:
 216                         mV = 2800;
 217                         break;
 218                 case MMC_VDD_165_195:
 219                         mV = 1850;
 220                         break;
 221                 default:
 222                         BUG();
 223                 }
 224                 return menelaus_set_vmmc(mV);
 225         } else {
 226                 if (!power_on)
 227                         return menelaus_set_vdcdc(3, 0);
 228                 switch (1 << vdd) {
 229                 case MMC_VDD_33_34:
 230                 case MMC_VDD_32_33:
 231                         mV = 3300;
 232                         break;
 233                 case MMC_VDD_30_31:
 234                 case MMC_VDD_29_30:
 235                         mV = 3000;
 236                         break;
 237                 case MMC_VDD_28_29:
 238                 case MMC_VDD_27_28:
 239                         mV = 2800;
 240                         break;
 241                 case MMC_VDD_24_25:
 242                 case MMC_VDD_23_24:
 243                         mV = 2400;
 244                         break;
 245                 case MMC_VDD_22_23:
 246                 case MMC_VDD_21_22:
 247                         mV = 2200;
 248                         break;
 249                 case MMC_VDD_20_21:
 250                         mV = 2000;
 251                         break;
 252                 case MMC_VDD_165_195:
 253                         mV = 1800;
 254                         break;
 255                 default:
 256                         BUG();
 257                 }
 258                 return menelaus_set_vdcdc(3, mV);
 259         }
 260         return 0;
 261 }
 262
 263 static void n810_set_power_emmc(struct device *dev,
 264                                          int power_on)
 265 {
 266         dev_dbg(dev, "Set EMMC power %s\n", power_on ? "on" : "off");
 267
 268         if (power_on) {
 269                 gpio_set_value(N810_EMMC_VSD_GPIO, 1);
 270                 msleep(1);
 271                 gpio_set_value(N810_EMMC_VIO_GPIO, 1);
 272                 msleep(1);
 273         } else {
 274                 gpio_set_value(N810_EMMC_VIO_GPIO, 0);
 275                 msleep(50);
 276                 gpio_set_value(N810_EMMC_VSD_GPIO, 0);
 277                 msleep(50);
 278         }
 279 }
 280
 281 static int n8x0_mmc_set_power(struct device *dev, int slot, int power_on,
 282                               int vdd)
 283 {
 284         if (board_is_n800() || slot == 0)
 285                 return n8x0_mmc_set_power_menelaus(dev, slot, power_on, vdd);
 286
 287         n810_set_power_emmc(dev, power_on);
 288
 289         return 0;
 290 }
 291
 292 static int n8x0_mmc_set_bus_mode(struct device *dev, int slot, int bus_mode)
 293 {
 294         int r;
 295
 296         dev_dbg(dev, "Set slot %d bus mode %s\n", slot + 1,
 297                 bus_mode == MMC_BUSMODE_OPENDRAIN ? "open-drain" : "push-pull");
 298         BUG_ON(slot != 0 && slot != 1);
 299         slot++;
 300         switch (bus_mode) {
 301         case MMC_BUSMODE_OPENDRAIN:
 302                 r = menelaus_set_mmc_opendrain(slot, 1);
 303                 break;
 304         case MMC_BUSMODE_PUSHPULL:
 305                 r = menelaus_set_mmc_opendrain(slot, 0);
 306                 break;
 307         default:
 308                 BUG();
 309         }
 310         if (r != 0 && printk_ratelimit())
 311                 dev_err(dev, "MMC: unable to set bus mode for slot %d\n",
 312                         slot);
 313         return r;
 314 }
 315
 316 static int n8x0_mmc_get_cover_state(struct device *dev, int slot)
 317 {
 318         slot++;
 319         BUG_ON(slot != 1 && slot != 2);
 320         if (slot == 1)
 321                 return slot1_cover_open;
 322         else
 323                 return slot2_cover_open;
 324 }
 325
 326 static void n8x0_mmc_callback(void *data, u8 card_mask)
 327 {
 328         int bit, *openp, index;
 329
 330         if (board_is_n800()) {
 331                 bit = 1 << 1;
 332                 openp = &slot2_cover_open;
 333                 index = 1;
 334         } else {
 335                 bit = 1;
 336                 openp = &slot1_cover_open;
 337                 index = 0;
 338         }
 339
 340         if (card_mask & bit)
 341                 *openp = 1;
 342         else
 343                 *openp = 0;
 344
 345 #ifdef CONFIG_MMC_OMAP
 346         omap_mmc_notify_cover_event(mmc_device, index, *openp);
 347 #else
 348         pr_warn("MMC: notify cover event not available\n");
 349 #endif
 350 }
 351
 352 static int n8x0_mmc_late_init(struct device *dev)
 353 {
 354         int r, bit, *openp;
 355         int vs2sel;
 356
 357         mmc_device = dev;
 358
 359         r = menelaus_set_slot_sel(1);
 360         if (r < 0)
 361                 return r;
 362
 363         if (board_is_n800())
 364                 vs2sel = 0;
 365         else
 366                 vs2sel = 2;
 367
 368         r = menelaus_set_mmc_slot(2, 0, vs2sel, 1);
 369         if (r < 0)
 370                 return r;
 371
 372         n8x0_mmc_set_power(dev, 0, MMC_POWER_ON, 16); /* MMC_VDD_28_29 */
 373         n8x0_mmc_set_power(dev, 1, MMC_POWER_ON, 16);
 374
 375         r = menelaus_set_mmc_slot(1, 1, 0, 1);
 376         if (r < 0)
 377                 return r;
 378         r = menelaus_set_mmc_slot(2, 1, vs2sel, 1);
 379         if (r < 0)
 380                 return r;
 381
 382         r = menelaus_get_slot_pin_states();
 383         if (r < 0)
 384                 return r;
 385
 386         if (board_is_n800()) {
 387                 bit = 1 << 1;
 388                 openp = &slot2_cover_open;
 389         } else {
 390                 bit = 1;
 391                 openp = &slot1_cover_open;
 392                 slot2_cover_open = 0;
 393         }
 394
 395         /* All slot pin bits seem to be inversed until first switch change */
 396         if (r == 0xf || r == (0xf & ~bit))
 397                 r = ~r;
 398
 399         if (r & bit)
 400                 *openp = 1;
 401         else
 402                 *openp = 0;
 403
 404         r = menelaus_register_mmc_callback(n8x0_mmc_callback, NULL);
 405
 406         return r;
 407 }
 408
 409 static void n8x0_mmc_shutdown(struct device *dev)
 410 {
 411         int vs2sel;
 412
 413         if (board_is_n800())
 414                 vs2sel = 0;
 415         else
 416                 vs2sel = 2;
 417
 418         menelaus_set_mmc_slot(1, 0, 0, 0);
 419         menelaus_set_mmc_slot(2, 0, vs2sel, 0);
 420 }
 421
 422 static void n8x0_mmc_cleanup(struct device *dev)
 423 {
 424         menelaus_unregister_mmc_callback();
 425
 426         gpio_free(N8X0_SLOT_SWITCH_GPIO);
 427
 428         if (board_is_n810()) {
 429                 gpio_free(N810_EMMC_VSD_GPIO);
 430                 gpio_free(N810_EMMC_VIO_GPIO);
 431         }
 432 }
 433
 434 /*
 435  * MMC controller1 has two slots that are multiplexed via I2C.
 436  * MMC controller2 is not in use.
 437  */
 438 static struct omap_mmc_platform_data mmc1_data = {
 439         .nr_slots                       = 0,
 440         .switch_slot                    = n8x0_mmc_switch_slot,
 441         .init                           = n8x0_mmc_late_init,
 442         .cleanup                        = n8x0_mmc_cleanup,
 443         .shutdown                       = n8x0_mmc_shutdown,
 444         .max_freq                       = 24000000,
 445         .slots[0] = {
 446                 .wires                  = 4,
 447                 .set_power              = n8x0_mmc_set_power,
 448                 .set_bus_mode           = n8x0_mmc_set_bus_mode,
 449                 .get_cover_state        = n8x0_mmc_get_cover_state,
 450                 .ocr_mask               = MMC_VDD_165_195 | MMC_VDD_30_31 |
 451                                                 MMC_VDD_32_33   | MMC_VDD_33_34,
 452                 .name                   = "internal",
 453         },
 454         .slots[1] = {
 455                 .set_power              = n8x0_mmc_set_power,
 456                 .set_bus_mode           = n8x0_mmc_set_bus_mode,
 457                 .get_cover_state        = n8x0_mmc_get_cover_state,
 458                 .ocr_mask               = MMC_VDD_165_195 | MMC_VDD_20_21 |
 459                                                 MMC_VDD_21_22 | MMC_VDD_22_23 |
 460                                                 MMC_VDD_23_24 | MMC_VDD_24_25 |
 461                                                 MMC_VDD_27_28 | MMC_VDD_28_29 |
 462                                                 MMC_VDD_29_30 | MMC_VDD_30_31 |
 463                                                 MMC_VDD_32_33 | MMC_VDD_33_34,
 464                 .name                   = "external",
 465         },
 466 };
 467
 468 static struct omap_mmc_platform_data *mmc_data[OMAP24XX_NR_MMC];
 469
 470 static struct gpio n810_emmc_gpios[] __initdata = {
 471         { N810_EMMC_VSD_GPIO, GPIOF_OUT_INIT_LOW,  "MMC slot 2 Vddf" },
 472         { N810_EMMC_VIO_GPIO, GPIOF_OUT_INIT_LOW,  "MMC slot 2 Vdd"  },
 473 };
 474
 475 static void __init n8x0_mmc_init(void)
 476 {
 477         int err;
 478
 479         if (board_is_n810()) {
 480                 mmc1_data.slots[0].name = "external";
 481
 482                 /*
 483                  * Some Samsung Movinand chips do not like open-ended
 484                  * multi-block reads and fall to braind-dead state
 485                  * while doing so. Reducing the number of blocks in
 486                  * the transfer or delays in clock disable do not help
 487                  */
 488                 mmc1_data.slots[1].name = "internal";
 489                 mmc1_data.slots[1].ban_openended = 1;
 490         }
 491
 492         err = gpio_request_one(N8X0_SLOT_SWITCH_GPIO, GPIOF_OUT_INIT_LOW,
 493                                "MMC slot switch");
 494         if (err)
 495                 return;
 496
 497         if (board_is_n810()) {
 498                 err = gpio_request_array(n810_emmc_gpios,
 499                                          ARRAY_SIZE(n810_emmc_gpios));
 500                 if (err) {
 501                         gpio_free(N8X0_SLOT_SWITCH_GPIO);
 502                         return;
 503                 }
 504         }
 505
 506         mmc1_data.nr_slots = 2;
 507         mmc_data[0] = &mmc1_data;
 508 }
 509 #else
 510 static struct omap_mmc_platform_data mmc1_data;
 511 void __init n8x0_mmc_init(void)
 512 {
 513 }
 514 #endif  /* CONFIG_MMC_OMAP */
 515
 516 #ifdef CONFIG_MENELAUS
 517
 518 static int n8x0_auto_sleep_regulators(void)
 519 {
 520         u32 val;
 521         int ret;
 522
 523         val = EN_VPLL_SLEEP | EN_VMMC_SLEEP    \
 524                 | EN_VAUX_SLEEP | EN_VIO_SLEEP \
 525                 | EN_VMEM_SLEEP | EN_DC3_SLEEP \
 526                 | EN_VC_SLEEP | EN_DC2_SLEEP;
 527
 528         ret = menelaus_set_regulator_sleep(1, val);
 529         if (ret < 0) {
 530                 pr_err("Could not set regulators to sleep on menelaus: %u\n",
 531                        ret);
 532                 return ret;
 533         }
 534         return 0;
 535 }
 536
 537 static int n8x0_auto_voltage_scale(void)
 538 {
 539         int ret;
 540
 541         ret = menelaus_set_vcore_hw(1400, 1050);
 542         if (ret < 0) {
 543                 pr_err("Could not set VCORE voltage on menelaus: %u\n", ret);
 544                 return ret;
 545         }
 546         return 0;
 547 }
 548
 549 static int n8x0_menelaus_late_init(struct device *dev)
 550 {
 551         int ret;
 552
 553         ret = n8x0_auto_voltage_scale();
 554         if (ret < 0)
 555                 return ret;
 556         ret = n8x0_auto_sleep_regulators();
 557         if (ret < 0)
 558                 return ret;
 559         return 0;
 560 }
 561
 562 #else
 563 static int n8x0_menelaus_late_init(struct device *dev)
 564 {
 565         return 0;
 566 }
 567 #endif
 568
 569 struct menelaus_platform_data n8x0_menelaus_platform_data __initdata = {
 570         .late_init = n8x0_menelaus_late_init,
 571 };
 572
 573 struct aic3x_pdata n810_aic33_data __initdata = {
 574         .gpio_reset = 118,
 575 };
 576
 577 static int __init n8x0_late_initcall(void)
 578 {
 579         if (!board_caps)
 580                 return -ENODEV;
 581
 582         n8x0_mmc_init();
 583         n8x0_usb_init();
 584
 585         return 0;
 586 }
 587 omap_late_initcall(n8x0_late_initcall);
 588
 589 /*
 590  * Legacy init pdata init for n8x0. Note that we want to follow the
 591  * I2C bus numbering starting at 0 for device tree like other omaps.
 592  */
 593 void * __init n8x0_legacy_init(void)
 594 {
 595         board_check_revision();
 596         spi_register_board_info(n800_spi_board_info,
 597                                 ARRAY_SIZE(n800_spi_board_info));
 598         return &mmc1_data;
 599 }