arch/arm/mach-s3c24xx/mach-gta02.c

   1 /*
   2  * S3C2442 Machine Support for Openmoko GTA02 / FreeRunner.
   3  *
   4  * Copyright (C) 2006-2009 by Openmoko, Inc.
   5  * Authors: Harald Welte <laforge@openmoko.org>
   6  *          Andy Green <andy@openmoko.org>
   7  *          Werner Almesberger <werner@openmoko.org>
   8  * All rights reserved.
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public License as
  12  * published by the Free Software Foundation; either version 2 of
  13  * the License, or (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  23  * MA 02111-1307 USA
  24  */
  25
  26 #include <linux/kernel.h>
  27 #include <linux/types.h>
  28 #include <linux/interrupt.h>
  29 #include <linux/list.h>
  30 #include <linux/delay.h>
  31 #include <linux/timer.h>
  32 #include <linux/init.h>
  33 #include <linux/gpio.h>
  34 #include <linux/gpio_keys.h>
  35 #include <linux/workqueue.h>
  36 #include <linux/platform_device.h>
  37 #include <linux/serial_core.h>
  38 #include <linux/input.h>
  39 #include <linux/io.h>
  40 #include <linux/i2c.h>
  41
  42 #include <linux/mmc/host.h>
  43
  44 #include <linux/mfd/pcf50633/adc.h>
  45 #include <linux/mfd/pcf50633/backlight.h>
  46 #include <linux/mfd/pcf50633/core.h>
  47 #include <linux/mfd/pcf50633/gpio.h>
  48 #include <linux/mfd/pcf50633/mbc.h>
  49 #include <linux/mfd/pcf50633/pmic.h>
  50
  51 #include <linux/mtd/mtd.h>
  52 #include <linux/mtd/nand.h>
  53 #include <linux/mtd/nand_ecc.h>
  54 #include <linux/mtd/partitions.h>
  55 #include <linux/mtd/physmap.h>
  56
  57 #include <linux/regulator/machine.h>
  58
  59 #include <linux/spi/spi.h>
  60 #include <linux/spi/s3c24xx.h>
  61
  62 #include <asm/irq.h>
  63 #include <asm/mach-types.h>
  64 #include <asm/mach/arch.h>
  65 #include <asm/mach/map.h>
  66 #include <asm/mach/irq.h>
  67
  68 #include <linux/platform_data/i2c-s3c2410.h>
  69 #include <linux/platform_data/mtd-nand-s3c2410.h>
  70 #include <linux/platform_data/touchscreen-s3c2410.h>
  71 #include <linux/platform_data/usb-ohci-s3c2410.h>
  72 #include <linux/platform_data/usb-s3c2410_udc.h>
  73
  74 #include <mach/fb.h>
  75 #include <mach/hardware.h>
  76 #include <mach/regs-gpio.h>
  77 #include <mach/regs-irq.h>
  78
  79 #include <plat/cpu.h>
  80 #include <plat/devs.h>
  81 #include <plat/gpio-cfg.h>
  82 #include <plat/pm.h>
  83 #include <plat/regs-serial.h>
  84 #include <plat/samsung-time.h>
  85
  86 #include "common.h"
  87 #include "gta02.h"
  88
  89 static struct pcf50633 *gta02_pcf;
  90
  91 /*
  92  * This gets called frequently when we paniced.
  93  */
  94
  95 static long gta02_panic_blink(int state)
  96 {
  97         long delay = 0;
  98         char led;
  99
 100         led = (state) ? 1 : 0;
 101         gpio_direction_output(GTA02_GPIO_AUX_LED, led);
 102
 103         return delay;
 104 }
 105
 106
 107 static struct map_desc gta02_iodesc[] __initdata = {
 108         {
 109                 .virtual        = 0xe0000000,
 110                 .pfn            = __phys_to_pfn(S3C2410_CS3 + 0x01000000),
 111                 .length         = SZ_1M,
 112                 .type           = MT_DEVICE
 113         },
 114 };
 115
 116 #define UCON (S3C2410_UCON_DEFAULT | S3C2443_UCON_RXERR_IRQEN)
 117 #define ULCON (S3C2410_LCON_CS8 | S3C2410_LCON_PNONE | S3C2410_LCON_STOPB)
 118 #define UFCON (S3C2410_UFCON_RXTRIG8 | S3C2410_UFCON_FIFOMODE)
 119
 120 static struct s3c2410_uartcfg gta02_uartcfgs[] = {
 121         [0] = {
 122                 .hwport         = 0,
 123                 .flags          = 0,
 124                 .ucon           = UCON,
 125                 .ulcon          = ULCON,
 126                 .ufcon          = UFCON,
 127         },
 128         [1] = {
 129                 .hwport         = 1,
 130                 .flags          = 0,
 131                 .ucon           = UCON,
 132                 .ulcon          = ULCON,
 133                 .ufcon          = UFCON,
 134         },
 135         [2] = {
 136                 .hwport         = 2,
 137                 .flags          = 0,
 138                 .ucon           = UCON,
 139                 .ulcon          = ULCON,
 140                 .ufcon          = UFCON,
 141         },
 142 };
 143
 144 #ifdef CONFIG_CHARGER_PCF50633
 145 /*
 146  * On GTA02 the 1A charger features a 48K resistor to 0V on the ID pin.
 147  * We use this to recognize that we can pull 1A from the USB socket.
 148  *
 149  * These constants are the measured pcf50633 ADC levels with the 1A
 150  * charger / 48K resistor, and with no pulldown resistor.
 151  */
 152
 153 #define ADC_NOM_CHG_DETECT_1A 6
 154 #define ADC_NOM_CHG_DETECT_USB 43
 155
 156 static void
 157 gta02_configure_pmu_for_charger(struct pcf50633 *pcf, void *unused, int res)
 158 {
 159         int  ma;
 160
 161         /* Interpret charger type */
 162         if (res < ((ADC_NOM_CHG_DETECT_USB + ADC_NOM_CHG_DETECT_1A) / 2)) {
 163
 164                 /*
 165                  * Sanity - stop GPO driving out now that we have a 1A charger
 166                  * GPO controls USB Host power generation on GTA02
 167                  */
 168                 pcf50633_gpio_set(pcf, PCF50633_GPO, 0);
 169
 170                 ma = 1000;
 171         } else
 172                 ma = 100;
 173
 174         pcf50633_mbc_usb_curlim_set(pcf, ma);
 175 }
 176
 177 static struct delayed_work gta02_charger_work;
 178 static int gta02_usb_vbus_draw;
 179
 180 static void gta02_charger_worker(struct work_struct *work)
 181 {
 182         if (gta02_usb_vbus_draw) {
 183                 pcf50633_mbc_usb_curlim_set(gta02_pcf, gta02_usb_vbus_draw);
 184                 return;
 185         }
 186
 187 #ifdef CONFIG_PCF50633_ADC
 188         pcf50633_adc_async_read(gta02_pcf,
 189                                 PCF50633_ADCC1_MUX_ADCIN1,
 190                                 PCF50633_ADCC1_AVERAGE_16,
 191                                 gta02_configure_pmu_for_charger,
 192                                 NULL);
 193 #else
 194         /*
 195          * If the PCF50633 ADC is disabled we fallback to a
 196          * 100mA limit for safety.
 197          */
 198         pcf50633_mbc_usb_curlim_set(pcf, 100);
 199 #endif
 200 }
 201
 202 #define GTA02_CHARGER_CONFIGURE_TIMEOUT ((3000 * HZ) / 1000)
 203
 204 static void gta02_pmu_event_callback(struct pcf50633 *pcf, int irq)
 205 {
 206         if (irq == PCF50633_IRQ_USBINS) {
 207                 schedule_delayed_work(&gta02_charger_work,
 208                                       GTA02_CHARGER_CONFIGURE_TIMEOUT);
 209
 210                 return;
 211         }
 212
 213         if (irq == PCF50633_IRQ_USBREM) {
 214                 cancel_delayed_work_sync(&gta02_charger_work);
 215                 gta02_usb_vbus_draw = 0;
 216         }
 217 }
 218
 219 static void gta02_udc_vbus_draw(unsigned int ma)
 220 {
 221         if (!gta02_pcf)
 222                 return;
 223
 224         gta02_usb_vbus_draw = ma;
 225
 226         schedule_delayed_work(&gta02_charger_work,
 227                               GTA02_CHARGER_CONFIGURE_TIMEOUT);
 228 }
 229 #else /* !CONFIG_CHARGER_PCF50633 */
 230 #define gta02_pmu_event_callback        NULL
 231 #define gta02_udc_vbus_draw             NULL
 232 #endif
 233
 234 /*
 235  * This is called when pc50633 is probed, unfortunately quite late in the
 236  * day since it is an I2C bus device. Here we can belatedly define some
 237  * platform devices with the advantage that we can mark the pcf50633 as the
 238  * parent. This makes them get suspended and resumed with their parent
 239  * the pcf50633 still around.
 240  */
 241
 242 static void gta02_pmu_attach_child_devices(struct pcf50633 *pcf);
 243
 244
 245 static char *gta02_batteries[] = {
 246         "battery",
 247 };
 248
 249 static struct pcf50633_bl_platform_data gta02_backlight_data = {
 250         .default_brightness = 0x3f,
 251         .default_brightness_limit = 0,
 252         .ramp_time = 5,
 253 };
 254
 255 static struct pcf50633_platform_data gta02_pcf_pdata = {
 256         .resumers = {
 257                 [0] =   PCF50633_INT1_USBINS |
 258                         PCF50633_INT1_USBREM |
 259                         PCF50633_INT1_ALARM,
 260                 [1] =   PCF50633_INT2_ONKEYF,
 261                 [2] =   PCF50633_INT3_ONKEY1S,
 262                 [3] =   PCF50633_INT4_LOWSYS |
 263                         PCF50633_INT4_LOWBAT |
 264                         PCF50633_INT4_HIGHTMP,
 265         },
 266
 267         .batteries = gta02_batteries,
 268         .num_batteries = ARRAY_SIZE(gta02_batteries),
 269
 270         .charger_reference_current_ma = 1000,
 271
 272         .backlight_data = &gta02_backlight_data,
 273
 274         .reg_init_data = {
 275                 [PCF50633_REGULATOR_AUTO] = {
 276                         .constraints = {
 277                                 .min_uV = 3300000,
 278                                 .max_uV = 3300000,
 279                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 280                                 .always_on = 1,
 281                                 .apply_uV = 1,
 282                         },
 283                 },
 284                 [PCF50633_REGULATOR_DOWN1] = {
 285                         .constraints = {
 286                                 .min_uV = 1300000,
 287                                 .max_uV = 1600000,
 288                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 289                                 .always_on = 1,
 290                                 .apply_uV = 1,
 291                         },
 292                 },
 293                 [PCF50633_REGULATOR_DOWN2] = {
 294                         .constraints = {
 295                                 .min_uV = 1800000,
 296                                 .max_uV = 1800000,
 297                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 298                                 .apply_uV = 1,
 299                                 .always_on = 1,
 300                         },
 301                 },
 302                 [PCF50633_REGULATOR_HCLDO] = {
 303                         .constraints = {
 304                                 .min_uV = 2000000,
 305                                 .max_uV = 3300000,
 306                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 307                                 .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
 308                                                 REGULATOR_CHANGE_STATUS,
 309                         },
 310                 },
 311                 [PCF50633_REGULATOR_LDO1] = {
 312                         .constraints = {
 313                                 .min_uV = 3300000,
 314                                 .max_uV = 3300000,
 315                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 316                                 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
 317                                 .apply_uV = 1,
 318                         },
 319                 },
 320                 [PCF50633_REGULATOR_LDO2] = {
 321                         .constraints = {
 322                                 .min_uV = 3300000,
 323                                 .max_uV = 3300000,
 324                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 325                                 .apply_uV = 1,
 326                         },
 327                 },
 328                 [PCF50633_REGULATOR_LDO3] = {
 329                         .constraints = {
 330                                 .min_uV = 3000000,
 331                                 .max_uV = 3000000,
 332                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 333                                 .apply_uV = 1,
 334                         },
 335                 },
 336                 [PCF50633_REGULATOR_LDO4] = {
 337                         .constraints = {
 338                                 .min_uV = 3200000,
 339                                 .max_uV = 3200000,
 340                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 341                                 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
 342                                 .apply_uV = 1,
 343                         },
 344                 },
 345                 [PCF50633_REGULATOR_LDO5] = {
 346                         .constraints = {
 347                                 .min_uV = 3000000,
 348                                 .max_uV = 3000000,
 349                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 350                                 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
 351                                 .apply_uV = 1,
 352                         },
 353                 },
 354                 [PCF50633_REGULATOR_LDO6] = {
 355                         .constraints = {
 356                                 .min_uV = 3000000,
 357                                 .max_uV = 3000000,
 358                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 359                         },
 360                 },
 361                 [PCF50633_REGULATOR_MEMLDO] = {
 362                         .constraints = {
 363                                 .min_uV = 1800000,
 364                                 .max_uV = 1800000,
 365                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 366                         },
 367                 },
 368
 369         },
 370         .probe_done = gta02_pmu_attach_child_devices,
 371         .mbc_event_callback = gta02_pmu_event_callback,
 372 };
 373
 374
 375 /* NOR Flash. */
 376
 377 #define GTA02_FLASH_BASE        0x18000000 /* GCS3 */
 378 #define GTA02_FLASH_SIZE        0x200000 /* 2MBytes */
 379
 380 static struct physmap_flash_data gta02_nor_flash_data = {
 381         .width          = 2,
 382 };
 383
 384 static struct resource gta02_nor_flash_resource =
 385         DEFINE_RES_MEM(GTA02_FLASH_BASE, GTA02_FLASH_SIZE);
 386
 387 static struct platform_device gta02_nor_flash = {
 388         .name           = "physmap-flash",
 389         .id             = 0,
 390         .dev            = {
 391                 .platform_data  = &gta02_nor_flash_data,
 392         },
 393         .resource       = &gta02_nor_flash_resource,
 394         .num_resources  = 1,
 395 };
 396
 397
 398 static struct platform_device s3c24xx_pwm_device = {
 399         .name           = "s3c24xx_pwm",
 400         .num_resources  = 0,
 401 };
 402
 403 static struct platform_device gta02_dfbmcs320_device = {
 404         .name = "dfbmcs320",
 405 };
 406
 407 static struct i2c_board_info gta02_i2c_devs[] __initdata = {
 408         {
 409                 I2C_BOARD_INFO("pcf50633", 0x73),
 410                 .irq = GTA02_IRQ_PCF50633,
 411                 .platform_data = &gta02_pcf_pdata,
 412         },
 413         {
 414                 I2C_BOARD_INFO("wm8753", 0x1a),
 415         },
 416 };
 417
 418 static struct s3c2410_nand_set __initdata gta02_nand_sets[] = {
 419         [0] = {
 420                 /*
 421                  * This name is also hard-coded in the boot loaders, so
 422                  * changing it would would require all users to upgrade
 423                  * their boot loaders, some of which are stored in a NOR
 424                  * that is considered to be immutable.
 425                  */
 426                 .name           = "neo1973-nand",
 427                 .nr_chips       = 1,
 428                 .flash_bbt      = 1,
 429         },
 430 };
 431
 432 /*
 433  * Choose a set of timings derived from S3C@2442B MCP54
 434  * data sheet (K5D2G13ACM-D075 MCP Memory).
 435  */
 436
 437 static struct s3c2410_platform_nand __initdata gta02_nand_info = {
 438         .tacls          = 0,
 439         .twrph0         = 25,
 440         .twrph1         = 15,
 441         .nr_sets        = ARRAY_SIZE(gta02_nand_sets),
 442         .sets           = gta02_nand_sets,
 443 };
 444
 445
 446 /* Get PMU to set USB current limit accordingly. */
 447 static struct s3c2410_udc_mach_info gta02_udc_cfg __initdata = {
 448         .vbus_draw      = gta02_udc_vbus_draw,
 449         .pullup_pin = GTA02_GPIO_USB_PULLUP,
 450 };
 451
 452 /* USB */
 453 static struct s3c2410_hcd_info gta02_usb_info __initdata = {
 454         .port[0]        = {
 455                 .flags  = S3C_HCDFLG_USED,
 456         },
 457         .port[1]        = {
 458                 .flags  = 0,
 459         },
 460 };
 461
 462 /* Touchscreen */
 463 static struct s3c2410_ts_mach_info gta02_ts_info = {
 464         .delay                  = 10000,
 465         .presc                  = 0xff, /* slow as we can go */
 466         .oversampling_shift     = 2,
 467 };
 468
 469 /* Buttons */
 470 static struct gpio_keys_button gta02_buttons[] = {
 471         {
 472                 .gpio = GTA02_GPIO_AUX_KEY,
 473                 .code = KEY_PHONE,
 474                 .desc = "Aux",
 475                 .type = EV_KEY,
 476                 .debounce_interval = 100,
 477         },
 478         {
 479                 .gpio = GTA02_GPIO_HOLD_KEY,
 480                 .code = KEY_PAUSE,
 481                 .desc = "Hold",
 482                 .type = EV_KEY,
 483                 .debounce_interval = 100,
 484         },
 485 };
 486
 487 static struct gpio_keys_platform_data gta02_buttons_pdata = {
 488         .buttons = gta02_buttons,
 489         .nbuttons = ARRAY_SIZE(gta02_buttons),
 490 };
 491
 492 static struct platform_device gta02_buttons_device = {
 493         .name = "gpio-keys",
 494         .id = -1,
 495         .dev = {
 496                 .platform_data = &gta02_buttons_pdata,
 497         },
 498 };
 499
 500 static void __init gta02_map_io(void)
 501 {
 502         s3c24xx_init_io(gta02_iodesc, ARRAY_SIZE(gta02_iodesc));
 503         s3c24xx_init_clocks(12000000);
 504         s3c24xx_init_uarts(gta02_uartcfgs, ARRAY_SIZE(gta02_uartcfgs));
 505         samsung_set_timer_source(SAMSUNG_PWM3, SAMSUNG_PWM4);
 506 }
 507
 508
 509 /* These are the guys that don't need to be children of PMU. */
 510
 511 static struct platform_device *gta02_devices[] __initdata = {
 512         &s3c_device_ohci,
 513         &s3c_device_wdt,
 514         &s3c_device_sdi,
 515         &s3c_device_usbgadget,
 516         &s3c_device_nand,
 517         &gta02_nor_flash,
 518         &s3c24xx_pwm_device,
 519         &s3c_device_iis,
 520         &s3c_device_i2c0,
 521         &gta02_dfbmcs320_device,
 522         &gta02_buttons_device,
 523         &s3c_device_adc,
 524         &s3c_device_ts,
 525 };
 526
 527 /* These guys DO need to be children of PMU. */
 528
 529 static struct platform_device *gta02_devices_pmu_children[] = {
 530 };
 531
 532
 533 /*
 534  * This is called when pc50633 is probed, quite late in the day since it is an
 535  * I2C bus device.  Here we can define platform devices with the advantage that
 536  * we can mark the pcf50633 as the parent.  This makes them get suspended and
 537  * resumed with their parent the pcf50633 still around.  All devices whose
 538  * operation depends on something from pcf50633 must have this relationship
 539  * made explicit like this, or suspend and resume will become an unreliable
 540  * hellworld.
 541  */
 542
 543 static void gta02_pmu_attach_child_devices(struct pcf50633 *pcf)
 544 {
 545         int n;
 546
 547         /* Grab a copy of the now probed PMU pointer. */
 548         gta02_pcf = pcf;
 549
 550         for (n = 0; n < ARRAY_SIZE(gta02_devices_pmu_children); n++)
 551                 gta02_devices_pmu_children[n]->dev.parent = pcf->dev;
 552
 553         platform_add_devices(gta02_devices_pmu_children,
 554                              ARRAY_SIZE(gta02_devices_pmu_children));
 555 }
 556
 557 static void gta02_poweroff(void)
 558 {
 559         pcf50633_reg_set_bit_mask(gta02_pcf, PCF50633_REG_OOCSHDWN, 1, 1);
 560 }
 561
 562 static void __init gta02_machine_init(void)
 563 {
 564         /* Set the panic callback to turn AUX LED on or off. */
 565         panic_blink = gta02_panic_blink;
 566
 567         s3c_pm_init();
 568
 569 #ifdef CONFIG_CHARGER_PCF50633
 570         INIT_DELAYED_WORK(&gta02_charger_work, gta02_charger_worker);
 571 #endif
 572
 573         s3c24xx_udc_set_platdata(&gta02_udc_cfg);
 574         s3c24xx_ts_set_platdata(&gta02_ts_info);
 575         s3c_ohci_set_platdata(&gta02_usb_info);
 576         s3c_nand_set_platdata(&gta02_nand_info);
 577         s3c_i2c0_set_platdata(NULL);
 578
 579         i2c_register_board_info(0, gta02_i2c_devs, ARRAY_SIZE(gta02_i2c_devs));
 580
 581         platform_add_devices(gta02_devices, ARRAY_SIZE(gta02_devices));
 582         pm_power_off = gta02_poweroff;
 583
 584         regulator_has_full_constraints();
 585 }
 586
 587
 588 MACHINE_START(NEO1973_GTA02, "GTA02")
 589         /* Maintainer: Nelson Castillo <arhuaco@freaks-unidos.net> */
 590         .atag_offset    = 0x100,
 591         .map_io         = gta02_map_io,
 592         .init_irq       = s3c2442_init_irq,
 593         .init_machine   = gta02_machine_init,
 594         .init_time      = samsung_timer_init,
 595         .restart        = s3c244x_restart,
 596 MACHINE_END