arch/arm/mach-s3c2440/mach-gta02.c

   1 /*
   2  * linux/arch/arm/mach-s3c2442/mach-gta02.c
   3  *
   4  * S3C2442 Machine Support for Openmoko GTA02 / FreeRunner.
   5  *
   6  * Copyright (C) 2006-2009 by Openmoko, Inc.
   7  * Authors: Harald Welte <laforge@openmoko.org>
   8  *          Andy Green <andy@openmoko.org>
   9  *          Werner Almesberger <werner@openmoko.org>
  10  * All rights reserved.
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License as
  14  * published by the Free Software Foundation; either version 2 of
  15  * the License, or (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  25  * MA 02111-1307 USA
  26  *
  27  */
  28
  29 #include <linux/kernel.h>
  30 #include <linux/types.h>
  31 #include <linux/interrupt.h>
  32 #include <linux/list.h>
  33 #include <linux/delay.h>
  34 #include <linux/timer.h>
  35 #include <linux/init.h>
  36 #include <linux/gpio.h>
  37 #include <linux/workqueue.h>
  38 #include <linux/platform_device.h>
  39 #include <linux/serial_core.h>
  40 #include <linux/spi/spi.h>
  41
  42 #include <linux/mmc/host.h>
  43
  44 #include <linux/mtd/mtd.h>
  45 #include <linux/mtd/nand.h>
  46 #include <linux/mtd/nand_ecc.h>
  47 #include <linux/mtd/partitions.h>
  48 #include <linux/mtd/physmap.h>
  49 #include <linux/io.h>
  50
  51 #include <linux/i2c.h>
  52 #include <linux/regulator/machine.h>
  53
  54 #include <linux/mfd/pcf50633/core.h>
  55 #include <linux/mfd/pcf50633/mbc.h>
  56 #include <linux/mfd/pcf50633/adc.h>
  57 #include <linux/mfd/pcf50633/gpio.h>
  58 #include <linux/mfd/pcf50633/pmic.h>
  59 #include <linux/mfd/pcf50633/backlight.h>
  60
  61 #include <linux/input.h>
  62 #include <linux/gpio_keys.h>
  63
  64 #include <asm/mach/arch.h>
  65 #include <asm/mach/map.h>
  66 #include <asm/mach/irq.h>
  67
  68 #include <asm/irq.h>
  69 #include <asm/mach-types.h>
  70
  71 #include <mach/regs-irq.h>
  72 #include <mach/regs-gpio.h>
  73 #include <mach/regs-gpioj.h>
  74 #include <mach/fb.h>
  75
  76 #include <mach/spi.h>
  77 #include <plat/usb-control.h>
  78 #include <mach/regs-mem.h>
  79 #include <mach/hardware.h>
  80
  81 #include <mach/gta02.h>
  82
  83 #include <plat/regs-serial.h>
  84 #include <plat/nand.h>
  85 #include <plat/devs.h>
  86 #include <plat/cpu.h>
  87 #include <plat/pm.h>
  88 #include <plat/udc.h>
  89 #include <plat/gpio-cfg.h>
  90 #include <plat/iic.h>
  91 #include <plat/ts.h>
  92
  93
  94 static struct pcf50633 *gta02_pcf;
  95
  96 /*
  97  * This gets called frequently when we paniced.
  98  */
  99
 100 static long gta02_panic_blink(int state)
 101 {
 102         long delay = 0;
 103         char led;
 104
 105         led = (state) ? 1 : 0;
 106         gpio_direction_output(GTA02_GPIO_AUX_LED, led);
 107
 108         return delay;
 109 }
 110
 111
 112 static struct map_desc gta02_iodesc[] __initdata = {
 113         {
 114                 .virtual        = 0xe0000000,
 115                 .pfn            = __phys_to_pfn(S3C2410_CS3 + 0x01000000),
 116                 .length         = SZ_1M,
 117                 .type           = MT_DEVICE
 118         },
 119 };
 120
 121 #define UCON (S3C2410_UCON_DEFAULT | S3C2443_UCON_RXERR_IRQEN)
 122 #define ULCON (S3C2410_LCON_CS8 | S3C2410_LCON_PNONE | S3C2410_LCON_STOPB)
 123 #define UFCON (S3C2410_UFCON_RXTRIG8 | S3C2410_UFCON_FIFOMODE)
 124
 125 static struct s3c2410_uartcfg gta02_uartcfgs[] = {
 126         [0] = {
 127                 .hwport         = 0,
 128                 .flags          = 0,
 129                 .ucon           = UCON,
 130                 .ulcon          = ULCON,
 131                 .ufcon          = UFCON,
 132         },
 133         [1] = {
 134                 .hwport         = 1,
 135                 .flags          = 0,
 136                 .ucon           = UCON,
 137                 .ulcon          = ULCON,
 138                 .ufcon          = UFCON,
 139         },
 140         [2] = {
 141                 .hwport         = 2,
 142                 .flags          = 0,
 143                 .ucon           = UCON,
 144                 .ulcon          = ULCON,
 145                 .ufcon          = UFCON,
 146         },
 147 };
 148
 149 #ifdef CONFIG_CHARGER_PCF50633
 150 /*
 151  * On GTA02 the 1A charger features a 48K resistor to 0V on the ID pin.
 152  * We use this to recognize that we can pull 1A from the USB socket.
 153  *
 154  * These constants are the measured pcf50633 ADC levels with the 1A
 155  * charger / 48K resistor, and with no pulldown resistor.
 156  */
 157
 158 #define ADC_NOM_CHG_DETECT_1A 6
 159 #define ADC_NOM_CHG_DETECT_USB 43
 160
 161 static void
 162 gta02_configure_pmu_for_charger(struct pcf50633 *pcf, void *unused, int res)
 163 {
 164         int  ma;
 165
 166         /* Interpret charger type */
 167         if (res < ((ADC_NOM_CHG_DETECT_USB + ADC_NOM_CHG_DETECT_1A) / 2)) {
 168
 169                 /*
 170                  * Sanity - stop GPO driving out now that we have a 1A charger
 171                  * GPO controls USB Host power generation on GTA02
 172                  */
 173                 pcf50633_gpio_set(pcf, PCF50633_GPO, 0);
 174
 175                 ma = 1000;
 176         } else
 177                 ma = 100;
 178
 179         pcf50633_mbc_usb_curlim_set(pcf, ma);
 180 }
 181
 182 static struct delayed_work gta02_charger_work;
 183 static int gta02_usb_vbus_draw;
 184
 185 static void gta02_charger_worker(struct work_struct *work)
 186 {
 187         if (gta02_usb_vbus_draw) {
 188                 pcf50633_mbc_usb_curlim_set(gta02_pcf, gta02_usb_vbus_draw);
 189                 return;
 190         }
 191
 192 #ifdef CONFIG_PCF50633_ADC
 193         pcf50633_adc_async_read(gta02_pcf,
 194                                 PCF50633_ADCC1_MUX_ADCIN1,
 195                                 PCF50633_ADCC1_AVERAGE_16,
 196                                 gta02_configure_pmu_for_charger,
 197                                 NULL);
 198 #else
 199         /*
 200          * If the PCF50633 ADC is disabled we fallback to a
 201          * 100mA limit for safety.
 202          */
 203         pcf50633_mbc_usb_curlim_set(pcf, 100);
 204 #endif
 205 }
 206
 207 #define GTA02_CHARGER_CONFIGURE_TIMEOUT ((3000 * HZ) / 1000)
 208
 209 static void gta02_pmu_event_callback(struct pcf50633 *pcf, int irq)
 210 {
 211         if (irq == PCF50633_IRQ_USBINS) {
 212                 schedule_delayed_work(&gta02_charger_work,
 213                                       GTA02_CHARGER_CONFIGURE_TIMEOUT);
 214
 215                 return;
 216         }
 217
 218         if (irq == PCF50633_IRQ_USBREM) {
 219                 cancel_delayed_work_sync(&gta02_charger_work);
 220                 gta02_usb_vbus_draw = 0;
 221         }
 222 }
 223
 224 static void gta02_udc_vbus_draw(unsigned int ma)
 225 {
 226         if (!gta02_pcf)
 227                 return;
 228
 229         gta02_usb_vbus_draw = ma;
 230
 231         schedule_delayed_work(&gta02_charger_work,
 232                               GTA02_CHARGER_CONFIGURE_TIMEOUT);
 233 }
 234 #else /* !CONFIG_CHARGER_PCF50633 */
 235 #define gta02_pmu_event_callback        NULL
 236 #define gta02_udc_vbus_draw             NULL
 237 #endif
 238
 239 /*
 240  * This is called when pc50633 is probed, unfortunately quite late in the
 241  * day since it is an I2C bus device. Here we can belatedly define some
 242  * platform devices with the advantage that we can mark the pcf50633 as the
 243  * parent. This makes them get suspended and resumed with their parent
 244  * the pcf50633 still around.
 245  */
 246
 247 static void gta02_pmu_attach_child_devices(struct pcf50633 *pcf);
 248
 249
 250 static char *gta02_batteries[] = {
 251         "battery",
 252 };
 253
 254 static struct pcf50633_bl_platform_data gta02_backlight_data = {
 255         .default_brightness = 0x3f,
 256         .default_brightness_limit = 0,
 257         .ramp_time = 5,
 258 };
 259
 260 struct pcf50633_platform_data gta02_pcf_pdata = {
 261         .resumers = {
 262                 [0] =   PCF50633_INT1_USBINS |
 263                         PCF50633_INT1_USBREM |
 264                         PCF50633_INT1_ALARM,
 265                 [1] =   PCF50633_INT2_ONKEYF,
 266                 [2] =   PCF50633_INT3_ONKEY1S,
 267                 [3] =   PCF50633_INT4_LOWSYS |
 268                         PCF50633_INT4_LOWBAT |
 269                         PCF50633_INT4_HIGHTMP,
 270         },
 271
 272         .batteries = gta02_batteries,
 273         .num_batteries = ARRAY_SIZE(gta02_batteries),
 274
 275         .charger_reference_current_ma = 1000,
 276
 277         .backlight_data = &gta02_backlight_data,
 278
 279         .reg_init_data = {
 280                 [PCF50633_REGULATOR_AUTO] = {
 281                         .constraints = {
 282                                 .min_uV = 3300000,
 283                                 .max_uV = 3300000,
 284                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 285                                 .always_on = 1,
 286                                 .apply_uV = 1,
 287                         },
 288                 },
 289                 [PCF50633_REGULATOR_DOWN1] = {
 290                         .constraints = {
 291                                 .min_uV = 1300000,
 292                                 .max_uV = 1600000,
 293                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 294                                 .always_on = 1,
 295                                 .apply_uV = 1,
 296                         },
 297                 },
 298                 [PCF50633_REGULATOR_DOWN2] = {
 299                         .constraints = {
 300                                 .min_uV = 1800000,
 301                                 .max_uV = 1800000,
 302                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 303                                 .apply_uV = 1,
 304                                 .always_on = 1,
 305                         },
 306                 },
 307                 [PCF50633_REGULATOR_HCLDO] = {
 308                         .constraints = {
 309                                 .min_uV = 2000000,
 310                                 .max_uV = 3300000,
 311                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 312                                 .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
 313                                                 REGULATOR_CHANGE_STATUS,
 314                         },
 315                 },
 316                 [PCF50633_REGULATOR_LDO1] = {
 317                         .constraints = {
 318                                 .min_uV = 3300000,
 319                                 .max_uV = 3300000,
 320                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 321                                 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
 322                                 .apply_uV = 1,
 323                         },
 324                 },
 325                 [PCF50633_REGULATOR_LDO2] = {
 326                         .constraints = {
 327                                 .min_uV = 3300000,
 328                                 .max_uV = 3300000,
 329                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 330                                 .apply_uV = 1,
 331                         },
 332                 },
 333                 [PCF50633_REGULATOR_LDO3] = {
 334                         .constraints = {
 335                                 .min_uV = 3000000,
 336                                 .max_uV = 3000000,
 337                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 338                                 .apply_uV = 1,
 339                         },
 340                 },
 341                 [PCF50633_REGULATOR_LDO4] = {
 342                         .constraints = {
 343                                 .min_uV = 3200000,
 344                                 .max_uV = 3200000,
 345                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 346                                 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
 347                                 .apply_uV = 1,
 348                         },
 349                 },
 350                 [PCF50633_REGULATOR_LDO5] = {
 351                         .constraints = {
 352                                 .min_uV = 3000000,
 353                                 .max_uV = 3000000,
 354                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 355                                 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
 356                                 .apply_uV = 1,
 357                         },
 358                 },
 359                 [PCF50633_REGULATOR_LDO6] = {
 360                         .constraints = {
 361                                 .min_uV = 3000000,
 362                                 .max_uV = 3000000,
 363                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 364                         },
 365                 },
 366                 [PCF50633_REGULATOR_MEMLDO] = {
 367                         .constraints = {
 368                                 .min_uV = 1800000,
 369                                 .max_uV = 1800000,
 370                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 371                         },
 372                 },
 373
 374         },
 375         .probe_done = gta02_pmu_attach_child_devices,
 376         .mbc_event_callback = gta02_pmu_event_callback,
 377 };
 378
 379
 380 /* NOR Flash. */
 381
 382 #define GTA02_FLASH_BASE        0x18000000 /* GCS3 */
 383 #define GTA02_FLASH_SIZE        0x200000 /* 2MBytes */
 384
 385 static struct physmap_flash_data gta02_nor_flash_data = {
 386         .width          = 2,
 387 };
 388
 389 static struct resource gta02_nor_flash_resource = {
 390         .start          = GTA02_FLASH_BASE,
 391         .end            = GTA02_FLASH_BASE + GTA02_FLASH_SIZE - 1,
 392         .flags          = IORESOURCE_MEM,
 393 };
 394
 395 static struct platform_device gta02_nor_flash = {
 396         .name           = "physmap-flash",
 397         .id             = 0,
 398         .dev            = {
 399                 .platform_data  = &gta02_nor_flash_data,
 400         },
 401         .resource       = &gta02_nor_flash_resource,
 402         .num_resources  = 1,
 403 };
 404
 405
 406 struct platform_device s3c24xx_pwm_device = {
 407         .name           = "s3c24xx_pwm",
 408         .num_resources  = 0,
 409 };
 410
 411 static struct platform_device gta02_dfbmcs320_device = {
 412         .name = "dfbmcs320",
 413 };
 414
 415 static struct i2c_board_info gta02_i2c_devs[] __initdata = {
 416         {
 417                 I2C_BOARD_INFO("pcf50633", 0x73),
 418                 .irq = GTA02_IRQ_PCF50633,
 419                 .platform_data = &gta02_pcf_pdata,
 420         },
 421         {
 422                 I2C_BOARD_INFO("wm8753", 0x1a),
 423         },
 424 };
 425
 426 static struct s3c2410_nand_set __initdata gta02_nand_sets[] = {
 427         [0] = {
 428                 /*
 429                  * This name is also hard-coded in the boot loaders, so
 430                  * changing it would would require all users to upgrade
 431                  * their boot loaders, some of which are stored in a NOR
 432                  * that is considered to be immutable.
 433                  */
 434                 .name           = "neo1973-nand",
 435                 .nr_chips       = 1,
 436                 .flash_bbt      = 1,
 437         },
 438 };
 439
 440 /*
 441  * Choose a set of timings derived from S3C@2442B MCP54
 442  * data sheet (K5D2G13ACM-D075 MCP Memory).
 443  */
 444
 445 static struct s3c2410_platform_nand __initdata gta02_nand_info = {
 446         .tacls          = 0,
 447         .twrph0         = 25,
 448         .twrph1         = 15,
 449         .nr_sets        = ARRAY_SIZE(gta02_nand_sets),
 450         .sets           = gta02_nand_sets,
 451 };
 452
 453
 454 /* Get PMU to set USB current limit accordingly. */
 455 static struct s3c2410_udc_mach_info gta02_udc_cfg __initdata = {
 456         .vbus_draw      = gta02_udc_vbus_draw,
 457         .pullup_pin = GTA02_GPIO_USB_PULLUP,
 458 };
 459
 460 /* USB */
 461 static struct s3c2410_hcd_info gta02_usb_info __initdata = {
 462         .port[0]        = {
 463                 .flags  = S3C_HCDFLG_USED,
 464         },
 465         .port[1]        = {
 466                 .flags  = 0,
 467         },
 468 };
 469
 470 /* Touchscreen */
 471 static struct s3c2410_ts_mach_info gta02_ts_info = {
 472         .delay                  = 10000,
 473         .presc                  = 0xff, /* slow as we can go */
 474         .oversampling_shift     = 2,
 475 };
 476
 477 /* Buttons */
 478 static struct gpio_keys_button gta02_buttons[] = {
 479         {
 480                 .gpio = GTA02_GPIO_AUX_KEY,
 481                 .code = KEY_PHONE,
 482                 .desc = "Aux",
 483                 .type = EV_KEY,
 484                 .debounce_interval = 100,
 485         },
 486         {
 487                 .gpio = GTA02_GPIO_HOLD_KEY,
 488                 .code = KEY_PAUSE,
 489                 .desc = "Hold",
 490                 .type = EV_KEY,
 491                 .debounce_interval = 100,
 492         },
 493 };
 494
 495 static struct gpio_keys_platform_data gta02_buttons_pdata = {
 496         .buttons = gta02_buttons,
 497         .nbuttons = ARRAY_SIZE(gta02_buttons),
 498 };
 499
 500 static struct platform_device gta02_buttons_device = {
 501         .name = "gpio-keys",
 502         .id = -1,
 503         .dev = {
 504                 .platform_data = &gta02_buttons_pdata,
 505         },
 506 };
 507
 508 static void __init gta02_map_io(void)
 509 {
 510         s3c24xx_init_io(gta02_iodesc, ARRAY_SIZE(gta02_iodesc));
 511         s3c24xx_init_clocks(12000000);
 512         s3c24xx_init_uarts(gta02_uartcfgs, ARRAY_SIZE(gta02_uartcfgs));
 513 }
 514
 515
 516 /* These are the guys that don't need to be children of PMU. */
 517
 518 static struct platform_device *gta02_devices[] __initdata = {
 519         &s3c_device_ohci,
 520         &s3c_device_wdt,
 521         &s3c_device_sdi,
 522         &s3c_device_usbgadget,
 523         &s3c_device_nand,
 524         &gta02_nor_flash,
 525         &s3c24xx_pwm_device,
 526         &s3c_device_iis,
 527         &samsung_asoc_dma,
 528         &s3c_device_i2c0,
 529         &gta02_dfbmcs320_device,
 530         &gta02_buttons_device,
 531         &s3c_device_adc,
 532         &s3c_device_ts,
 533 };
 534
 535 /* These guys DO need to be children of PMU. */
 536
 537 static struct platform_device *gta02_devices_pmu_children[] = {
 538 };
 539
 540
 541 /*
 542  * This is called when pc50633 is probed, quite late in the day since it is an
 543  * I2C bus device.  Here we can define platform devices with the advantage that
 544  * we can mark the pcf50633 as the parent.  This makes them get suspended and
 545  * resumed with their parent the pcf50633 still around.  All devices whose
 546  * operation depends on something from pcf50633 must have this relationship
 547  * made explicit like this, or suspend and resume will become an unreliable
 548  * hellworld.
 549  */
 550
 551 static void gta02_pmu_attach_child_devices(struct pcf50633 *pcf)
 552 {
 553         int n;
 554
 555         /* Grab a copy of the now probed PMU pointer. */
 556         gta02_pcf = pcf;
 557
 558         for (n = 0; n < ARRAY_SIZE(gta02_devices_pmu_children); n++)
 559                 gta02_devices_pmu_children[n]->dev.parent = pcf->dev;
 560
 561         platform_add_devices(gta02_devices_pmu_children,
 562                              ARRAY_SIZE(gta02_devices_pmu_children));
 563 }
 564
 565 static void gta02_poweroff(void)
 566 {
 567         pcf50633_reg_set_bit_mask(gta02_pcf, PCF50633_REG_OOCSHDWN, 1, 1);
 568 }
 569
 570 static void __init gta02_machine_init(void)
 571 {
 572         /* Set the panic callback to turn AUX LED on or off. */
 573         panic_blink = gta02_panic_blink;
 574
 575         s3c_pm_init();
 576
 577 #ifdef CONFIG_CHARGER_PCF50633
 578         INIT_DELAYED_WORK(&gta02_charger_work, gta02_charger_worker);
 579 #endif
 580
 581         s3c24xx_udc_set_platdata(&gta02_udc_cfg);
 582         s3c24xx_ts_set_platdata(&gta02_ts_info);
 583         s3c_ohci_set_platdata(&gta02_usb_info);
 584         s3c_nand_set_platdata(&gta02_nand_info);
 585         s3c_i2c0_set_platdata(NULL);
 586
 587         i2c_register_board_info(0, gta02_i2c_devs, ARRAY_SIZE(gta02_i2c_devs));
 588
 589         platform_add_devices(gta02_devices, ARRAY_SIZE(gta02_devices));
 590         pm_power_off = gta02_poweroff;
 591
 592         regulator_has_full_constraints();
 593 }
 594
 595
 596 MACHINE_START(NEO1973_GTA02, "GTA02")
 597         /* Maintainer: Nelson Castillo <arhuaco@freaks-unidos.net> */
 598         .atag_offset    = 0x100,
 599         .map_io         = gta02_map_io,
 600         .init_irq       = s3c24xx_init_irq,
 601         .init_machine   = gta02_machine_init,
 602         .timer          = &s3c24xx_timer,
 603 MACHINE_END