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 IS_ENABLED(CONFIG_USB_MUSB_TUSB6010)
  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) && IS_ENABLED(CONFIG_MMC_OMAP)
 167
 168 /*
 169  * On both N800 and N810, only the first of the two MMC controllers is in use.
 170  * The two MMC slots are multiplexed via Menelaus companion chip over I2C.
 171  * On N800, both slots are powered via Menelaus. On N810, only one of the
 172  * slots is powered via Menelaus. The N810 EMMC is powered via GPIO.
 173  *
 174  * VMMC                         slot 1 on both N800 and N810
 175  * VDCDC3_APE and VMCS2_APE     slot 2 on N800
 176  * GPIO23 and GPIO9             slot 2 EMMC on N810
 177  *
 178  */
 179 #define N8X0_SLOT_SWITCH_GPIO   96
 180 #define N810_EMMC_VSD_GPIO      23
 181 #define N810_EMMC_VIO_GPIO      9
 182
 183 static int slot1_cover_open;
 184 static int slot2_cover_open;
 185 static struct device *mmc_device;
 186
 187 static int n8x0_mmc_switch_slot(struct device *dev, int slot)
 188 {
 189 #ifdef CONFIG_MMC_DEBUG
 190         dev_dbg(dev, "Choose slot %d\n", slot + 1);
 191 #endif
 192         gpio_set_value(N8X0_SLOT_SWITCH_GPIO, slot);
 193         return 0;
 194 }
 195
 196 static int n8x0_mmc_set_power_menelaus(struct device *dev, int slot,
 197                                         int power_on, int vdd)
 198 {
 199         int mV;
 200
 201 #ifdef CONFIG_MMC_DEBUG
 202         dev_dbg(dev, "Set slot %d power: %s (vdd %d)\n", slot + 1,
 203                 power_on ? "on" : "off", vdd);
 204 #endif
 205         if (slot == 0) {
 206                 if (!power_on)
 207                         return menelaus_set_vmmc(0);
 208                 switch (1 << vdd) {
 209                 case MMC_VDD_33_34:
 210                 case MMC_VDD_32_33:
 211                 case MMC_VDD_31_32:
 212                         mV = 3100;
 213                         break;
 214                 case MMC_VDD_30_31:
 215                         mV = 3000;
 216                         break;
 217                 case MMC_VDD_28_29:
 218                         mV = 2800;
 219                         break;
 220                 case MMC_VDD_165_195:
 221                         mV = 1850;
 222                         break;
 223                 default:
 224                         BUG();
 225                 }
 226                 return menelaus_set_vmmc(mV);
 227         } else {
 228                 if (!power_on)
 229                         return menelaus_set_vdcdc(3, 0);
 230                 switch (1 << vdd) {
 231                 case MMC_VDD_33_34:
 232                 case MMC_VDD_32_33:
 233                         mV = 3300;
 234                         break;
 235                 case MMC_VDD_30_31:
 236                 case MMC_VDD_29_30:
 237                         mV = 3000;
 238                         break;
 239                 case MMC_VDD_28_29:
 240                 case MMC_VDD_27_28:
 241                         mV = 2800;
 242                         break;
 243                 case MMC_VDD_24_25:
 244                 case MMC_VDD_23_24:
 245                         mV = 2400;
 246                         break;
 247                 case MMC_VDD_22_23:
 248                 case MMC_VDD_21_22:
 249                         mV = 2200;
 250                         break;
 251                 case MMC_VDD_20_21:
 252                         mV = 2000;
 253                         break;
 254                 case MMC_VDD_165_195:
 255                         mV = 1800;
 256                         break;
 257                 default:
 258                         BUG();
 259                 }
 260                 return menelaus_set_vdcdc(3, mV);
 261         }
 262         return 0;
 263 }
 264
 265 static void n810_set_power_emmc(struct device *dev,
 266                                          int power_on)
 267 {
 268         dev_dbg(dev, "Set EMMC power %s\n", power_on ? "on" : "off");
 269
 270         if (power_on) {
 271                 gpio_set_value(N810_EMMC_VSD_GPIO, 1);
 272                 msleep(1);
 273                 gpio_set_value(N810_EMMC_VIO_GPIO, 1);
 274                 msleep(1);
 275         } else {
 276                 gpio_set_value(N810_EMMC_VIO_GPIO, 0);
 277                 msleep(50);
 278                 gpio_set_value(N810_EMMC_VSD_GPIO, 0);
 279                 msleep(50);
 280         }
 281 }
 282
 283 static int n8x0_mmc_set_power(struct device *dev, int slot, int power_on,
 284                               int vdd)
 285 {
 286         if (board_is_n800() || slot == 0)
 287                 return n8x0_mmc_set_power_menelaus(dev, slot, power_on, vdd);
 288
 289         n810_set_power_emmc(dev, power_on);
 290
 291         return 0;
 292 }
 293
 294 static int n8x0_mmc_set_bus_mode(struct device *dev, int slot, int bus_mode)
 295 {
 296         int r;
 297
 298         dev_dbg(dev, "Set slot %d bus mode %s\n", slot + 1,
 299                 bus_mode == MMC_BUSMODE_OPENDRAIN ? "open-drain" : "push-pull");
 300         BUG_ON(slot != 0 && slot != 1);
 301         slot++;
 302         switch (bus_mode) {
 303         case MMC_BUSMODE_OPENDRAIN:
 304                 r = menelaus_set_mmc_opendrain(slot, 1);
 305                 break;
 306         case MMC_BUSMODE_PUSHPULL:
 307                 r = menelaus_set_mmc_opendrain(slot, 0);
 308                 break;
 309         default:
 310                 BUG();
 311         }
 312         if (r != 0 && printk_ratelimit())
 313                 dev_err(dev, "MMC: unable to set bus mode for slot %d\n",
 314                         slot);
 315         return r;
 316 }
 317
 318 static int n8x0_mmc_get_cover_state(struct device *dev, int slot)
 319 {
 320         slot++;
 321         BUG_ON(slot != 1 && slot != 2);
 322         if (slot == 1)
 323                 return slot1_cover_open;
 324         else
 325                 return slot2_cover_open;
 326 }
 327
 328 static void n8x0_mmc_callback(void *data, u8 card_mask)
 329 {
 330         int bit, *openp, index;
 331
 332         if (board_is_n800()) {
 333                 bit = 1 << 1;
 334                 openp = &slot2_cover_open;
 335                 index = 1;
 336         } else {
 337                 bit = 1;
 338                 openp = &slot1_cover_open;
 339                 index = 0;
 340         }
 341
 342         if (card_mask & bit)
 343                 *openp = 1;
 344         else
 345                 *openp = 0;
 346
 347 #ifdef CONFIG_MMC_OMAP
 348         omap_mmc_notify_cover_event(mmc_device, index, *openp);
 349 #else
 350         pr_warn("MMC: notify cover event not available\n");
 351 #endif
 352 }
 353
 354 static int n8x0_mmc_late_init(struct device *dev)
 355 {
 356         int r, bit, *openp;
 357         int vs2sel;
 358
 359         mmc_device = dev;
 360
 361         r = menelaus_set_slot_sel(1);
 362         if (r < 0)
 363                 return r;
 364
 365         if (board_is_n800())
 366                 vs2sel = 0;
 367         else
 368                 vs2sel = 2;
 369
 370         r = menelaus_set_mmc_slot(2, 0, vs2sel, 1);
 371         if (r < 0)
 372                 return r;
 373
 374         n8x0_mmc_set_power(dev, 0, MMC_POWER_ON, 16); /* MMC_VDD_28_29 */
 375         n8x0_mmc_set_power(dev, 1, MMC_POWER_ON, 16);
 376
 377         r = menelaus_set_mmc_slot(1, 1, 0, 1);
 378         if (r < 0)
 379                 return r;
 380         r = menelaus_set_mmc_slot(2, 1, vs2sel, 1);
 381         if (r < 0)
 382                 return r;
 383
 384         r = menelaus_get_slot_pin_states();
 385         if (r < 0)
 386                 return r;
 387
 388         if (board_is_n800()) {
 389                 bit = 1 << 1;
 390                 openp = &slot2_cover_open;
 391         } else {
 392                 bit = 1;
 393                 openp = &slot1_cover_open;
 394                 slot2_cover_open = 0;
 395         }
 396
 397         /* All slot pin bits seem to be inversed until first switch change */
 398         if (r == 0xf || r == (0xf & ~bit))
 399                 r = ~r;
 400
 401         if (r & bit)
 402                 *openp = 1;
 403         else
 404                 *openp = 0;
 405
 406         r = menelaus_register_mmc_callback(n8x0_mmc_callback, NULL);
 407
 408         return r;
 409 }
 410
 411 static void n8x0_mmc_shutdown(struct device *dev)
 412 {
 413         int vs2sel;
 414
 415         if (board_is_n800())
 416                 vs2sel = 0;
 417         else
 418                 vs2sel = 2;
 419
 420         menelaus_set_mmc_slot(1, 0, 0, 0);
 421         menelaus_set_mmc_slot(2, 0, vs2sel, 0);
 422 }
 423
 424 static void n8x0_mmc_cleanup(struct device *dev)
 425 {
 426         menelaus_unregister_mmc_callback();
 427
 428         gpio_free(N8X0_SLOT_SWITCH_GPIO);
 429
 430         if (board_is_n810()) {
 431                 gpio_free(N810_EMMC_VSD_GPIO);
 432                 gpio_free(N810_EMMC_VIO_GPIO);
 433         }
 434 }
 435
 436 /*
 437  * MMC controller1 has two slots that are multiplexed via I2C.
 438  * MMC controller2 is not in use.
 439  */
 440 static struct omap_mmc_platform_data mmc1_data = {
 441         .nr_slots                       = 0,
 442         .switch_slot                    = n8x0_mmc_switch_slot,
 443         .init                           = n8x0_mmc_late_init,
 444         .cleanup                        = n8x0_mmc_cleanup,
 445         .shutdown                       = n8x0_mmc_shutdown,
 446         .max_freq                       = 24000000,
 447         .slots[0] = {
 448                 .wires                  = 4,
 449                 .set_power              = n8x0_mmc_set_power,
 450                 .set_bus_mode           = n8x0_mmc_set_bus_mode,
 451                 .get_cover_state        = n8x0_mmc_get_cover_state,
 452                 .ocr_mask               = MMC_VDD_165_195 | MMC_VDD_30_31 |
 453                                                 MMC_VDD_32_33   | MMC_VDD_33_34,
 454                 .name                   = "internal",
 455         },
 456         .slots[1] = {
 457                 .set_power              = n8x0_mmc_set_power,
 458                 .set_bus_mode           = n8x0_mmc_set_bus_mode,
 459                 .get_cover_state        = n8x0_mmc_get_cover_state,
 460                 .ocr_mask               = MMC_VDD_165_195 | MMC_VDD_20_21 |
 461                                                 MMC_VDD_21_22 | MMC_VDD_22_23 |
 462                                                 MMC_VDD_23_24 | MMC_VDD_24_25 |
 463                                                 MMC_VDD_27_28 | MMC_VDD_28_29 |
 464                                                 MMC_VDD_29_30 | MMC_VDD_30_31 |
 465                                                 MMC_VDD_32_33 | MMC_VDD_33_34,
 466                 .name                   = "external",
 467         },
 468 };
 469
 470 static struct omap_mmc_platform_data *mmc_data[OMAP24XX_NR_MMC];
 471
 472 static struct gpio n810_emmc_gpios[] __initdata = {
 473         { N810_EMMC_VSD_GPIO, GPIOF_OUT_INIT_LOW,  "MMC slot 2 Vddf" },
 474         { N810_EMMC_VIO_GPIO, GPIOF_OUT_INIT_LOW,  "MMC slot 2 Vdd"  },
 475 };
 476
 477 static void __init n8x0_mmc_init(void)
 478 {
 479         int err;
 480
 481         if (board_is_n810()) {
 482                 mmc1_data.slots[0].name = "external";
 483
 484                 /*
 485                  * Some Samsung Movinand chips do not like open-ended
 486                  * multi-block reads and fall to braind-dead state
 487                  * while doing so. Reducing the number of blocks in
 488                  * the transfer or delays in clock disable do not help
 489                  */
 490                 mmc1_data.slots[1].name = "internal";
 491                 mmc1_data.slots[1].ban_openended = 1;
 492         }
 493
 494         err = gpio_request_one(N8X0_SLOT_SWITCH_GPIO, GPIOF_OUT_INIT_LOW,
 495                                "MMC slot switch");
 496         if (err)
 497                 return;
 498
 499         if (board_is_n810()) {
 500                 err = gpio_request_array(n810_emmc_gpios,
 501                                          ARRAY_SIZE(n810_emmc_gpios));
 502                 if (err) {
 503                         gpio_free(N8X0_SLOT_SWITCH_GPIO);
 504                         return;
 505                 }
 506         }
 507
 508         mmc1_data.nr_slots = 2;
 509         mmc_data[0] = &mmc1_data;
 510 }
 511 #else
 512 static struct omap_mmc_platform_data mmc1_data;
 513 void __init n8x0_mmc_init(void)
 514 {
 515 }
 516 #endif  /* CONFIG_MMC_OMAP */
 517
 518 #ifdef CONFIG_MENELAUS
 519
 520 static int n8x0_auto_sleep_regulators(void)
 521 {
 522         u32 val;
 523         int ret;
 524
 525         val = EN_VPLL_SLEEP | EN_VMMC_SLEEP    \
 526                 | EN_VAUX_SLEEP | EN_VIO_SLEEP \
 527                 | EN_VMEM_SLEEP | EN_DC3_SLEEP \
 528                 | EN_VC_SLEEP | EN_DC2_SLEEP;
 529
 530         ret = menelaus_set_regulator_sleep(1, val);
 531         if (ret < 0) {
 532                 pr_err("Could not set regulators to sleep on menelaus: %u\n",
 533                        ret);
 534                 return ret;
 535         }
 536         return 0;
 537 }
 538
 539 static int n8x0_auto_voltage_scale(void)
 540 {
 541         int ret;
 542
 543         ret = menelaus_set_vcore_hw(1400, 1050);
 544         if (ret < 0) {
 545                 pr_err("Could not set VCORE voltage on menelaus: %u\n", ret);
 546                 return ret;
 547         }
 548         return 0;
 549 }
 550
 551 static int n8x0_menelaus_late_init(struct device *dev)
 552 {
 553         int ret;
 554
 555         ret = n8x0_auto_voltage_scale();
 556         if (ret < 0)
 557                 return ret;
 558         ret = n8x0_auto_sleep_regulators();
 559         if (ret < 0)
 560                 return ret;
 561         return 0;
 562 }
 563
 564 #else
 565 static int n8x0_menelaus_late_init(struct device *dev)
 566 {
 567         return 0;
 568 }
 569 #endif
 570
 571 struct menelaus_platform_data n8x0_menelaus_platform_data __initdata = {
 572         .late_init = n8x0_menelaus_late_init,
 573 };
 574
 575 struct aic3x_pdata n810_aic33_data __initdata = {
 576         .gpio_reset = 118,
 577 };
 578
 579 static int __init n8x0_late_initcall(void)
 580 {
 581         if (!board_caps)
 582                 return -ENODEV;
 583
 584         n8x0_mmc_init();
 585         n8x0_usb_init();
 586
 587         return 0;
 588 }
 589 omap_late_initcall(n8x0_late_initcall);
 590
 591 /*
 592  * Legacy init pdata init for n8x0. Note that we want to follow the
 593  * I2C bus numbering starting at 0 for device tree like other omaps.
 594  */
 595 void * __init n8x0_legacy_init(void)
 596 {
 597         board_check_revision();
 598         spi_register_board_info(n800_spi_board_info,
 599                                 ARRAY_SIZE(n800_spi_board_info));
 600         return &mmc1_data;
 601 }