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
  85 #include "common.h"
  86 #include "gta02.h"
  87
  88 static struct pcf50633 *gta02_pcf;
  89
  90 /*
  91  * This gets called frequently when we paniced.
  92  */
  93
  94 static long gta02_panic_blink(int state)
  95 {
  96         long delay = 0;
  97         char led;
  98
  99         led = (state) ? 1 : 0;
 100         gpio_direction_output(GTA02_GPIO_AUX_LED, led);
 101
 102         return delay;
 103 }
 104
 105
 106 static struct map_desc gta02_iodesc[] __initdata = {
 107         {
 108                 .virtual        = 0xe0000000,
 109                 .pfn            = __phys_to_pfn(S3C2410_CS3 + 0x01000000),
 110                 .length         = SZ_1M,
 111                 .type           = MT_DEVICE
 112         },
 113 };
 114
 115 #define UCON (S3C2410_UCON_DEFAULT | S3C2443_UCON_RXERR_IRQEN)
 116 #define ULCON (S3C2410_LCON_CS8 | S3C2410_LCON_PNONE | S3C2410_LCON_STOPB)
 117 #define UFCON (S3C2410_UFCON_RXTRIG8 | S3C2410_UFCON_FIFOMODE)
 118
 119 static struct s3c2410_uartcfg gta02_uartcfgs[] = {
 120         [0] = {
 121                 .hwport         = 0,
 122                 .flags          = 0,
 123                 .ucon           = UCON,
 124                 .ulcon          = ULCON,
 125                 .ufcon          = UFCON,
 126         },
 127         [1] = {
 128                 .hwport         = 1,
 129                 .flags          = 0,
 130                 .ucon           = UCON,
 131                 .ulcon          = ULCON,
 132                 .ufcon          = UFCON,
 133         },
 134         [2] = {
 135                 .hwport         = 2,
 136                 .flags          = 0,
 137                 .ucon           = UCON,
 138                 .ulcon          = ULCON,
 139                 .ufcon          = UFCON,
 140         },
 141 };
 142
 143 #ifdef CONFIG_CHARGER_PCF50633
 144 /*
 145  * On GTA02 the 1A charger features a 48K resistor to 0V on the ID pin.
 146  * We use this to recognize that we can pull 1A from the USB socket.
 147  *
 148  * These constants are the measured pcf50633 ADC levels with the 1A
 149  * charger / 48K resistor, and with no pulldown resistor.
 150  */
 151
 152 #define ADC_NOM_CHG_DETECT_1A 6
 153 #define ADC_NOM_CHG_DETECT_USB 43
 154
 155 static void
 156 gta02_configure_pmu_for_charger(struct pcf50633 *pcf, void *unused, int res)
 157 {
 158         int  ma;
 159
 160         /* Interpret charger type */
 161         if (res < ((ADC_NOM_CHG_DETECT_USB + ADC_NOM_CHG_DETECT_1A) / 2)) {
 162
 163                 /*
 164                  * Sanity - stop GPO driving out now that we have a 1A charger
 165                  * GPO controls USB Host power generation on GTA02
 166                  */
 167                 pcf50633_gpio_set(pcf, PCF50633_GPO, 0);
 168
 169                 ma = 1000;
 170         } else
 171                 ma = 100;
 172
 173         pcf50633_mbc_usb_curlim_set(pcf, ma);
 174 }
 175
 176 static struct delayed_work gta02_charger_work;
 177 static int gta02_usb_vbus_draw;
 178
 179 static void gta02_charger_worker(struct work_struct *work)
 180 {
 181         if (gta02_usb_vbus_draw) {
 182                 pcf50633_mbc_usb_curlim_set(gta02_pcf, gta02_usb_vbus_draw);
 183                 return;
 184         }
 185
 186 #ifdef CONFIG_PCF50633_ADC
 187         pcf50633_adc_async_read(gta02_pcf,
 188                                 PCF50633_ADCC1_MUX_ADCIN1,
 189                                 PCF50633_ADCC1_AVERAGE_16,
 190                                 gta02_configure_pmu_for_charger,
 191                                 NULL);
 192 #else
 193         /*
 194          * If the PCF50633 ADC is disabled we fallback to a
 195          * 100mA limit for safety.
 196          */
 197         pcf50633_mbc_usb_curlim_set(pcf, 100);
 198 #endif
 199 }
 200
 201 #define GTA02_CHARGER_CONFIGURE_TIMEOUT ((3000 * HZ) / 1000)
 202
 203 static void gta02_pmu_event_callback(struct pcf50633 *pcf, int irq)
 204 {
 205         if (irq == PCF50633_IRQ_USBINS) {
 206                 schedule_delayed_work(&gta02_charger_work,
 207                                       GTA02_CHARGER_CONFIGURE_TIMEOUT);
 208
 209                 return;
 210         }
 211
 212         if (irq == PCF50633_IRQ_USBREM) {
 213                 cancel_delayed_work_sync(&gta02_charger_work);
 214                 gta02_usb_vbus_draw = 0;
 215         }
 216 }
 217
 218 static void gta02_udc_vbus_draw(unsigned int ma)
 219 {
 220         if (!gta02_pcf)
 221                 return;
 222
 223         gta02_usb_vbus_draw = ma;
 224
 225         schedule_delayed_work(&gta02_charger_work,
 226                               GTA02_CHARGER_CONFIGURE_TIMEOUT);
 227 }
 228 #else /* !CONFIG_CHARGER_PCF50633 */
 229 #define gta02_pmu_event_callback        NULL
 230 #define gta02_udc_vbus_draw             NULL
 231 #endif
 232
 233 /*
 234  * This is called when pc50633 is probed, unfortunately quite late in the
 235  * day since it is an I2C bus device. Here we can belatedly define some
 236  * platform devices with the advantage that we can mark the pcf50633 as the
 237  * parent. This makes them get suspended and resumed with their parent
 238  * the pcf50633 still around.
 239  */
 240
 241 static void gta02_pmu_attach_child_devices(struct pcf50633 *pcf);
 242
 243
 244 static char *gta02_batteries[] = {
 245         "battery",
 246 };
 247
 248 static struct pcf50633_bl_platform_data gta02_backlight_data = {
 249         .default_brightness = 0x3f,
 250         .default_brightness_limit = 0,
 251         .ramp_time = 5,
 252 };
 253
 254 static struct pcf50633_platform_data gta02_pcf_pdata = {
 255         .resumers = {
 256                 [0] =   PCF50633_INT1_USBINS |
 257                         PCF50633_INT1_USBREM |
 258                         PCF50633_INT1_ALARM,
 259                 [1] =   PCF50633_INT2_ONKEYF,
 260                 [2] =   PCF50633_INT3_ONKEY1S,
 261                 [3] =   PCF50633_INT4_LOWSYS |
 262                         PCF50633_INT4_LOWBAT |
 263                         PCF50633_INT4_HIGHTMP,
 264         },
 265
 266         .batteries = gta02_batteries,
 267         .num_batteries = ARRAY_SIZE(gta02_batteries),
 268
 269         .charger_reference_current_ma = 1000,
 270
 271         .backlight_data = &gta02_backlight_data,
 272
 273         .reg_init_data = {
 274                 [PCF50633_REGULATOR_AUTO] = {
 275                         .constraints = {
 276                                 .min_uV = 3300000,
 277                                 .max_uV = 3300000,
 278                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 279                                 .always_on = 1,
 280                                 .apply_uV = 1,
 281                         },
 282                 },
 283                 [PCF50633_REGULATOR_DOWN1] = {
 284                         .constraints = {
 285                                 .min_uV = 1300000,
 286                                 .max_uV = 1600000,
 287                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 288                                 .always_on = 1,
 289                                 .apply_uV = 1,
 290                         },
 291                 },
 292                 [PCF50633_REGULATOR_DOWN2] = {
 293                         .constraints = {
 294                                 .min_uV = 1800000,
 295                                 .max_uV = 1800000,
 296                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 297                                 .apply_uV = 1,
 298                                 .always_on = 1,
 299                         },
 300                 },
 301                 [PCF50633_REGULATOR_HCLDO] = {
 302                         .constraints = {
 303                                 .min_uV = 2000000,
 304                                 .max_uV = 3300000,
 305                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 306                                 .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
 307                                                 REGULATOR_CHANGE_STATUS,
 308                         },
 309                 },
 310                 [PCF50633_REGULATOR_LDO1] = {
 311                         .constraints = {
 312                                 .min_uV = 3300000,
 313                                 .max_uV = 3300000,
 314                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 315                                 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
 316                                 .apply_uV = 1,
 317                         },
 318                 },
 319                 [PCF50633_REGULATOR_LDO2] = {
 320                         .constraints = {
 321                                 .min_uV = 3300000,
 322                                 .max_uV = 3300000,
 323                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 324                                 .apply_uV = 1,
 325                         },
 326                 },
 327                 [PCF50633_REGULATOR_LDO3] = {
 328                         .constraints = {
 329                                 .min_uV = 3000000,
 330                                 .max_uV = 3000000,
 331                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 332                                 .apply_uV = 1,
 333                         },
 334                 },
 335                 [PCF50633_REGULATOR_LDO4] = {
 336                         .constraints = {
 337                                 .min_uV = 3200000,
 338                                 .max_uV = 3200000,
 339                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 340                                 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
 341                                 .apply_uV = 1,
 342                         },
 343                 },
 344                 [PCF50633_REGULATOR_LDO5] = {
 345                         .constraints = {
 346                                 .min_uV = 3000000,
 347                                 .max_uV = 3000000,
 348                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 349                                 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
 350                                 .apply_uV = 1,
 351                         },
 352                 },
 353                 [PCF50633_REGULATOR_LDO6] = {
 354                         .constraints = {
 355                                 .min_uV = 3000000,
 356                                 .max_uV = 3000000,
 357                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 358                         },
 359                 },
 360                 [PCF50633_REGULATOR_MEMLDO] = {
 361                         .constraints = {
 362                                 .min_uV = 1800000,
 363                                 .max_uV = 1800000,
 364                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 365                         },
 366                 },
 367
 368         },
 369         .probe_done = gta02_pmu_attach_child_devices,
 370         .mbc_event_callback = gta02_pmu_event_callback,
 371 };
 372
 373
 374 /* NOR Flash. */
 375
 376 #define GTA02_FLASH_BASE        0x18000000 /* GCS3 */
 377 #define GTA02_FLASH_SIZE        0x200000 /* 2MBytes */
 378
 379 static struct physmap_flash_data gta02_nor_flash_data = {
 380         .width          = 2,
 381 };
 382
 383 static struct resource gta02_nor_flash_resource =
 384         DEFINE_RES_MEM(GTA02_FLASH_BASE, GTA02_FLASH_SIZE);
 385
 386 static struct platform_device gta02_nor_flash = {
 387         .name           = "physmap-flash",
 388         .id             = 0,
 389         .dev            = {
 390                 .platform_data  = &gta02_nor_flash_data,
 391         },
 392         .resource       = &gta02_nor_flash_resource,
 393         .num_resources  = 1,
 394 };
 395
 396
 397 static struct platform_device s3c24xx_pwm_device = {
 398         .name           = "s3c24xx_pwm",
 399         .num_resources  = 0,
 400 };
 401
 402 static struct platform_device gta02_dfbmcs320_device = {
 403         .name = "dfbmcs320",
 404 };
 405
 406 static struct i2c_board_info gta02_i2c_devs[] __initdata = {
 407         {
 408                 I2C_BOARD_INFO("pcf50633", 0x73),
 409                 .irq = GTA02_IRQ_PCF50633,
 410                 .platform_data = &gta02_pcf_pdata,
 411         },
 412         {
 413                 I2C_BOARD_INFO("wm8753", 0x1a),
 414         },
 415 };
 416
 417 static struct s3c2410_nand_set __initdata gta02_nand_sets[] = {
 418         [0] = {
 419                 /*
 420                  * This name is also hard-coded in the boot loaders, so
 421                  * changing it would would require all users to upgrade
 422                  * their boot loaders, some of which are stored in a NOR
 423                  * that is considered to be immutable.
 424                  */
 425                 .name           = "neo1973-nand",
 426                 .nr_chips       = 1,
 427                 .flash_bbt      = 1,
 428         },
 429 };
 430
 431 /*
 432  * Choose a set of timings derived from S3C@2442B MCP54
 433  * data sheet (K5D2G13ACM-D075 MCP Memory).
 434  */
 435
 436 static struct s3c2410_platform_nand __initdata gta02_nand_info = {
 437         .tacls          = 0,
 438         .twrph0         = 25,
 439         .twrph1         = 15,
 440         .nr_sets        = ARRAY_SIZE(gta02_nand_sets),
 441         .sets           = gta02_nand_sets,
 442 };
 443
 444
 445 /* Get PMU to set USB current limit accordingly. */
 446 static struct s3c2410_udc_mach_info gta02_udc_cfg __initdata = {
 447         .vbus_draw      = gta02_udc_vbus_draw,
 448         .pullup_pin = GTA02_GPIO_USB_PULLUP,
 449 };
 450
 451 /* USB */
 452 static struct s3c2410_hcd_info gta02_usb_info __initdata = {
 453         .port[0]        = {
 454                 .flags  = S3C_HCDFLG_USED,
 455         },
 456         .port[1]        = {
 457                 .flags  = 0,
 458         },
 459 };
 460
 461 /* Touchscreen */
 462 static struct s3c2410_ts_mach_info gta02_ts_info = {
 463         .delay                  = 10000,
 464         .presc                  = 0xff, /* slow as we can go */
 465         .oversampling_shift     = 2,
 466 };
 467
 468 /* Buttons */
 469 static struct gpio_keys_button gta02_buttons[] = {
 470         {
 471                 .gpio = GTA02_GPIO_AUX_KEY,
 472                 .code = KEY_PHONE,
 473                 .desc = "Aux",
 474                 .type = EV_KEY,
 475                 .debounce_interval = 100,
 476         },
 477         {
 478                 .gpio = GTA02_GPIO_HOLD_KEY,
 479                 .code = KEY_PAUSE,
 480                 .desc = "Hold",
 481                 .type = EV_KEY,
 482                 .debounce_interval = 100,
 483         },
 484 };
 485
 486 static struct gpio_keys_platform_data gta02_buttons_pdata = {
 487         .buttons = gta02_buttons,
 488         .nbuttons = ARRAY_SIZE(gta02_buttons),
 489 };
 490
 491 static struct platform_device gta02_buttons_device = {
 492         .name = "gpio-keys",
 493         .id = -1,
 494         .dev = {
 495                 .platform_data = &gta02_buttons_pdata,
 496         },
 497 };
 498
 499 static void __init gta02_map_io(void)
 500 {
 501         s3c24xx_init_io(gta02_iodesc, ARRAY_SIZE(gta02_iodesc));
 502         s3c24xx_init_clocks(12000000);
 503         s3c24xx_init_uarts(gta02_uartcfgs, ARRAY_SIZE(gta02_uartcfgs));
 504 }
 505
 506
 507 /* These are the guys that don't need to be children of PMU. */
 508
 509 static struct platform_device *gta02_devices[] __initdata = {
 510         &s3c_device_ohci,
 511         &s3c_device_wdt,
 512         &s3c_device_sdi,
 513         &s3c_device_usbgadget,
 514         &s3c_device_nand,
 515         &gta02_nor_flash,
 516         &s3c24xx_pwm_device,
 517         &s3c_device_iis,
 518         &s3c_device_i2c0,
 519         &gta02_dfbmcs320_device,
 520         &gta02_buttons_device,
 521         &s3c_device_adc,
 522         &s3c_device_ts,
 523 };
 524
 525 /* These guys DO need to be children of PMU. */
 526
 527 static struct platform_device *gta02_devices_pmu_children[] = {
 528 };
 529
 530
 531 /*
 532  * This is called when pc50633 is probed, quite late in the day since it is an
 533  * I2C bus device.  Here we can define platform devices with the advantage that
 534  * we can mark the pcf50633 as the parent.  This makes them get suspended and
 535  * resumed with their parent the pcf50633 still around.  All devices whose
 536  * operation depends on something from pcf50633 must have this relationship
 537  * made explicit like this, or suspend and resume will become an unreliable
 538  * hellworld.
 539  */
 540
 541 static void gta02_pmu_attach_child_devices(struct pcf50633 *pcf)
 542 {
 543         int n;
 544
 545         /* Grab a copy of the now probed PMU pointer. */
 546         gta02_pcf = pcf;
 547
 548         for (n = 0; n < ARRAY_SIZE(gta02_devices_pmu_children); n++)
 549                 gta02_devices_pmu_children[n]->dev.parent = pcf->dev;
 550
 551         platform_add_devices(gta02_devices_pmu_children,
 552                              ARRAY_SIZE(gta02_devices_pmu_children));
 553 }
 554
 555 static void gta02_poweroff(void)
 556 {
 557         pcf50633_reg_set_bit_mask(gta02_pcf, PCF50633_REG_OOCSHDWN, 1, 1);
 558 }
 559
 560 static void __init gta02_machine_init(void)
 561 {
 562         /* Set the panic callback to turn AUX LED on or off. */
 563         panic_blink = gta02_panic_blink;
 564
 565         s3c_pm_init();
 566
 567 #ifdef CONFIG_CHARGER_PCF50633
 568         INIT_DELAYED_WORK(&gta02_charger_work, gta02_charger_worker);
 569 #endif
 570
 571         s3c24xx_udc_set_platdata(&gta02_udc_cfg);
 572         s3c24xx_ts_set_platdata(&gta02_ts_info);
 573         s3c_ohci_set_platdata(&gta02_usb_info);
 574         s3c_nand_set_platdata(&gta02_nand_info);
 575         s3c_i2c0_set_platdata(NULL);
 576
 577         i2c_register_board_info(0, gta02_i2c_devs, ARRAY_SIZE(gta02_i2c_devs));
 578
 579         platform_add_devices(gta02_devices, ARRAY_SIZE(gta02_devices));
 580         pm_power_off = gta02_poweroff;
 581
 582         regulator_has_full_constraints();
 583 }
 584
 585
 586 MACHINE_START(NEO1973_GTA02, "GTA02")
 587         /* Maintainer: Nelson Castillo <arhuaco@freaks-unidos.net> */
 588         .atag_offset    = 0x100,
 589         .map_io         = gta02_map_io,
 590         .init_irq       = s3c24xx_init_irq,
 591         .init_machine   = gta02_machine_init,
 592         .init_time      = s3c24xx_timer_init,
 593         .restart        = s3c244x_restart,
 594 MACHINE_END