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 <mach/spi-gpio.h>
  78 #include <plat/usb-control.h>
  79 #include <mach/regs-mem.h>
  80 #include <mach/hardware.h>
  81
  82 #include <mach/gta02.h>
  83
  84 #include <plat/regs-serial.h>
  85 #include <plat/nand.h>
  86 #include <plat/devs.h>
  87 #include <plat/cpu.h>
  88 #include <plat/pm.h>
  89 #include <plat/udc.h>
  90 #include <plat/gpio-cfg.h>
  91 #include <plat/iic.h>
  92
  93 static struct pcf50633 *gta02_pcf;
  94
  95 /*
  96  * This gets called frequently when we paniced.
  97  */
  98
  99 static long gta02_panic_blink(int state)
 100 {
 101         long delay = 0;
 102         char led;
 103
 104         led = (state) ? 1 : 0;
 105         gpio_direction_output(GTA02_GPIO_AUX_LED, led);
 106
 107         return delay;
 108 }
 109
 110
 111 static struct map_desc gta02_iodesc[] __initdata = {
 112         {
 113                 .virtual        = 0xe0000000,
 114                 .pfn            = __phys_to_pfn(S3C2410_CS3 + 0x01000000),
 115                 .length         = SZ_1M,
 116                 .type           = MT_DEVICE
 117         },
 118 };
 119
 120 #define UCON (S3C2410_UCON_DEFAULT | S3C2443_UCON_RXERR_IRQEN)
 121 #define ULCON (S3C2410_LCON_CS8 | S3C2410_LCON_PNONE | S3C2410_LCON_STOPB)
 122 #define UFCON (S3C2410_UFCON_RXTRIG8 | S3C2410_UFCON_FIFOMODE)
 123
 124 static struct s3c2410_uartcfg gta02_uartcfgs[] = {
 125         [0] = {
 126                 .hwport         = 0,
 127                 .flags          = 0,
 128                 .ucon           = UCON,
 129                 .ulcon          = ULCON,
 130                 .ufcon          = UFCON,
 131         },
 132         [1] = {
 133                 .hwport         = 1,
 134                 .flags          = 0,
 135                 .ucon           = UCON,
 136                 .ulcon          = ULCON,
 137                 .ufcon          = UFCON,
 138         },
 139         [2] = {
 140                 .hwport         = 2,
 141                 .flags          = 0,
 142                 .ucon           = UCON,
 143                 .ulcon          = ULCON,
 144                 .ufcon          = UFCON,
 145         },
 146 };
 147
 148 #ifdef CONFIG_CHARGER_PCF50633
 149 /*
 150  * On GTA02 the 1A charger features a 48K resistor to 0V on the ID pin.
 151  * We use this to recognize that we can pull 1A from the USB socket.
 152  *
 153  * These constants are the measured pcf50633 ADC levels with the 1A
 154  * charger / 48K resistor, and with no pulldown resistor.
 155  */
 156
 157 #define ADC_NOM_CHG_DETECT_1A 6
 158 #define ADC_NOM_CHG_DETECT_USB 43
 159
 160 static void
 161 gta02_configure_pmu_for_charger(struct pcf50633 *pcf, void *unused, int res)
 162 {
 163         int  ma;
 164
 165         /* Interpret charger type */
 166         if (res < ((ADC_NOM_CHG_DETECT_USB + ADC_NOM_CHG_DETECT_1A) / 2)) {
 167
 168                 /*
 169                  * Sanity - stop GPO driving out now that we have a 1A charger
 170                  * GPO controls USB Host power generation on GTA02
 171                  */
 172                 pcf50633_gpio_set(pcf, PCF50633_GPO, 0);
 173
 174                 ma = 1000;
 175         } else
 176                 ma = 100;
 177
 178         pcf50633_mbc_usb_curlim_set(pcf, ma);
 179 }
 180
 181 static struct delayed_work gta02_charger_work;
 182 static int gta02_usb_vbus_draw;
 183
 184 static void gta02_charger_worker(struct work_struct *work)
 185 {
 186         if (gta02_usb_vbus_draw) {
 187                 pcf50633_mbc_usb_curlim_set(gta02_pcf, gta02_usb_vbus_draw);
 188                 return;
 189         }
 190
 191 #ifdef CONFIG_PCF50633_ADC
 192         pcf50633_adc_async_read(gta02_pcf,
 193                                 PCF50633_ADCC1_MUX_ADCIN1,
 194                                 PCF50633_ADCC1_AVERAGE_16,
 195                                 gta02_configure_pmu_for_charger,
 196                                 NULL);
 197 #else
 198         /*
 199          * If the PCF50633 ADC is disabled we fallback to a
 200          * 100mA limit for safety.
 201          */
 202         pcf50633_mbc_usb_curlim_set(pcf, 100);
 203 #endif
 204 }
 205
 206 #define GTA02_CHARGER_CONFIGURE_TIMEOUT ((3000 * HZ) / 1000)
 207
 208 static void gta02_pmu_event_callback(struct pcf50633 *pcf, int irq)
 209 {
 210         if (irq == PCF50633_IRQ_USBINS) {
 211                 schedule_delayed_work(&gta02_charger_work,
 212                                       GTA02_CHARGER_CONFIGURE_TIMEOUT);
 213
 214                 return;
 215         }
 216
 217         if (irq == PCF50633_IRQ_USBREM) {
 218                 cancel_delayed_work_sync(&gta02_charger_work);
 219                 gta02_usb_vbus_draw = 0;
 220         }
 221 }
 222
 223 static void gta02_udc_vbus_draw(unsigned int ma)
 224 {
 225         if (!gta02_pcf)
 226                 return;
 227
 228         gta02_usb_vbus_draw = ma;
 229
 230         schedule_delayed_work(&gta02_charger_work,
 231                               GTA02_CHARGER_CONFIGURE_TIMEOUT);
 232 }
 233 #else /* !CONFIG_CHARGER_PCF50633 */
 234 #define gta02_pmu_event_callback        NULL
 235 #define gta02_udc_vbus_draw             NULL
 236 #endif
 237
 238 /*
 239  * This is called when pc50633 is probed, unfortunately quite late in the
 240  * day since it is an I2C bus device. Here we can belatedly define some
 241  * platform devices with the advantage that we can mark the pcf50633 as the
 242  * parent. This makes them get suspended and resumed with their parent
 243  * the pcf50633 still around.
 244  */
 245
 246 static void gta02_pmu_attach_child_devices(struct pcf50633 *pcf);
 247
 248
 249 static char *gta02_batteries[] = {
 250         "battery",
 251 };
 252
 253 static struct pcf50633_bl_platform_data gta02_backlight_data = {
 254         .default_brightness = 0x3f,
 255         .default_brightness_limit = 0,
 256         .ramp_time = 5,
 257 };
 258
 259 struct pcf50633_platform_data gta02_pcf_pdata = {
 260         .resumers = {
 261                 [0] =   PCF50633_INT1_USBINS |
 262                         PCF50633_INT1_USBREM |
 263                         PCF50633_INT1_ALARM,
 264                 [1] =   PCF50633_INT2_ONKEYF,
 265                 [2] =   PCF50633_INT3_ONKEY1S,
 266                 [3] =   PCF50633_INT4_LOWSYS |
 267                         PCF50633_INT4_LOWBAT |
 268                         PCF50633_INT4_HIGHTMP,
 269         },
 270
 271         .batteries = gta02_batteries,
 272         .num_batteries = ARRAY_SIZE(gta02_batteries),
 273
 274         .charger_reference_current_ma = 1000,
 275
 276         .backlight_data = &gta02_backlight_data,
 277
 278         .reg_init_data = {
 279                 [PCF50633_REGULATOR_AUTO] = {
 280                         .constraints = {
 281                                 .min_uV = 3300000,
 282                                 .max_uV = 3300000,
 283                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 284                                 .always_on = 1,
 285                                 .apply_uV = 1,
 286                                 .state_mem = {
 287                                         .enabled = 1,
 288                                 },
 289                         },
 290                 },
 291                 [PCF50633_REGULATOR_DOWN1] = {
 292                         .constraints = {
 293                                 .min_uV = 1300000,
 294                                 .max_uV = 1600000,
 295                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 296                                 .always_on = 1,
 297                                 .apply_uV = 1,
 298                         },
 299                 },
 300                 [PCF50633_REGULATOR_DOWN2] = {
 301                         .constraints = {
 302                                 .min_uV = 1800000,
 303                                 .max_uV = 1800000,
 304                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 305                                 .apply_uV = 1,
 306                                 .always_on = 1,
 307                                 .state_mem = {
 308                                         .enabled = 1,
 309                                 },
 310                         },
 311                 },
 312                 [PCF50633_REGULATOR_HCLDO] = {
 313                         .constraints = {
 314                                 .min_uV = 2000000,
 315                                 .max_uV = 3300000,
 316                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 317                                 .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
 318                                                 REGULATOR_CHANGE_STATUS,
 319                         },
 320                 },
 321                 [PCF50633_REGULATOR_LDO1] = {
 322                         .constraints = {
 323                                 .min_uV = 3300000,
 324                                 .max_uV = 3300000,
 325                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 326                                 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
 327                                 .apply_uV = 1,
 328                                 .state_mem = {
 329                                         .enabled = 0,
 330                                 },
 331                         },
 332                 },
 333                 [PCF50633_REGULATOR_LDO2] = {
 334                         .constraints = {
 335                                 .min_uV = 3300000,
 336                                 .max_uV = 3300000,
 337                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 338                                 .apply_uV = 1,
 339                         },
 340                 },
 341                 [PCF50633_REGULATOR_LDO3] = {
 342                         .constraints = {
 343                                 .min_uV = 3000000,
 344                                 .max_uV = 3000000,
 345                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 346                                 .apply_uV = 1,
 347                         },
 348                 },
 349                 [PCF50633_REGULATOR_LDO4] = {
 350                         .constraints = {
 351                                 .min_uV = 3200000,
 352                                 .max_uV = 3200000,
 353                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 354                                 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
 355                                 .apply_uV = 1,
 356                         },
 357                 },
 358                 [PCF50633_REGULATOR_LDO5] = {
 359                         .constraints = {
 360                                 .min_uV = 3000000,
 361                                 .max_uV = 3000000,
 362                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 363                                 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
 364                                 .apply_uV = 1,
 365                                 .state_mem = {
 366                                         .enabled = 1,
 367                                 },
 368                         },
 369                 },
 370                 [PCF50633_REGULATOR_LDO6] = {
 371                         .constraints = {
 372                                 .min_uV = 3000000,
 373                                 .max_uV = 3000000,
 374                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 375                         },
 376                 },
 377                 [PCF50633_REGULATOR_MEMLDO] = {
 378                         .constraints = {
 379                                 .min_uV = 1800000,
 380                                 .max_uV = 1800000,
 381                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 382                                 .state_mem = {
 383                                         .enabled = 1,
 384                                 },
 385                         },
 386                 },
 387
 388         },
 389         .probe_done = gta02_pmu_attach_child_devices,
 390         .mbc_event_callback = gta02_pmu_event_callback,
 391 };
 392
 393
 394 /* NOR Flash. */
 395
 396 #define GTA02_FLASH_BASE        0x18000000 /* GCS3 */
 397 #define GTA02_FLASH_SIZE        0x200000 /* 2MBytes */
 398
 399 static struct physmap_flash_data gta02_nor_flash_data = {
 400         .width          = 2,
 401 };
 402
 403 static struct resource gta02_nor_flash_resource = {
 404         .start          = GTA02_FLASH_BASE,
 405         .end            = GTA02_FLASH_BASE + GTA02_FLASH_SIZE - 1,
 406         .flags          = IORESOURCE_MEM,
 407 };
 408
 409 static struct platform_device gta02_nor_flash = {
 410         .name           = "physmap-flash",
 411         .id             = 0,
 412         .dev            = {
 413                 .platform_data  = &gta02_nor_flash_data,
 414         },
 415         .resource       = &gta02_nor_flash_resource,
 416         .num_resources  = 1,
 417 };
 418
 419
 420 struct platform_device s3c24xx_pwm_device = {
 421         .name           = "s3c24xx_pwm",
 422         .num_resources  = 0,
 423 };
 424
 425 static struct i2c_board_info gta02_i2c_devs[] __initdata = {
 426         {
 427                 I2C_BOARD_INFO("pcf50633", 0x73),
 428                 .irq = GTA02_IRQ_PCF50633,
 429                 .platform_data = &gta02_pcf_pdata,
 430         },
 431         {
 432                 I2C_BOARD_INFO("wm8753", 0x1a),
 433         },
 434 };
 435
 436 static struct s3c2410_nand_set __initdata gta02_nand_sets[] = {
 437         [0] = {
 438                 /*
 439                  * This name is also hard-coded in the boot loaders, so
 440                  * changing it would would require all users to upgrade
 441                  * their boot loaders, some of which are stored in a NOR
 442                  * that is considered to be immutable.
 443                  */
 444                 .name           = "neo1973-nand",
 445                 .nr_chips       = 1,
 446                 .flash_bbt      = 1,
 447         },
 448 };
 449
 450 /*
 451  * Choose a set of timings derived from S3C@2442B MCP54
 452  * data sheet (K5D2G13ACM-D075 MCP Memory).
 453  */
 454
 455 static struct s3c2410_platform_nand __initdata gta02_nand_info = {
 456         .tacls          = 0,
 457         .twrph0         = 25,
 458         .twrph1         = 15,
 459         .nr_sets        = ARRAY_SIZE(gta02_nand_sets),
 460         .sets           = gta02_nand_sets,
 461 };
 462
 463
 464 static void gta02_udc_command(enum s3c2410_udc_cmd_e cmd)
 465 {
 466         switch (cmd) {
 467         case S3C2410_UDC_P_ENABLE:
 468                 pr_debug("%s S3C2410_UDC_P_ENABLE\n", __func__);
 469                 gpio_direction_output(GTA02_GPIO_USB_PULLUP, 1);
 470                 break;
 471         case S3C2410_UDC_P_DISABLE:
 472                 pr_debug("%s S3C2410_UDC_P_DISABLE\n", __func__);
 473                 gpio_direction_output(GTA02_GPIO_USB_PULLUP, 0);
 474                 break;
 475         case S3C2410_UDC_P_RESET:
 476                 pr_debug("%s S3C2410_UDC_P_RESET\n", __func__);
 477                 /* FIXME: Do something here. */
 478         }
 479 }
 480
 481 /* Get PMU to set USB current limit accordingly. */
 482 static struct s3c2410_udc_mach_info gta02_udc_cfg = {
 483         .vbus_draw      = gta02_udc_vbus_draw,
 484         .udc_command    = gta02_udc_command,
 485
 486 };
 487
 488 /* USB */
 489 static struct s3c2410_hcd_info gta02_usb_info __initdata = {
 490         .port[0]        = {
 491                 .flags  = S3C_HCDFLG_USED,
 492         },
 493         .port[1]        = {
 494                 .flags  = 0,
 495         },
 496 };
 497
 498 /* Buttons */
 499 static struct gpio_keys_button gta02_buttons[] = {
 500         {
 501                 .gpio = GTA02_GPIO_AUX_KEY,
 502                 .code = KEY_PHONE,
 503                 .desc = "Aux",
 504                 .type = EV_KEY,
 505                 .debounce_interval = 100,
 506         },
 507         {
 508                 .gpio = GTA02_GPIO_HOLD_KEY,
 509                 .code = KEY_PAUSE,
 510                 .desc = "Hold",
 511                 .type = EV_KEY,
 512                 .debounce_interval = 100,
 513         },
 514 };
 515
 516 static struct gpio_keys_platform_data gta02_buttons_pdata = {
 517         .buttons = gta02_buttons,
 518         .nbuttons = ARRAY_SIZE(gta02_buttons),
 519 };
 520
 521 static struct platform_device gta02_buttons_device = {
 522         .name = "gpio-keys",
 523         .id = -1,
 524         .dev = {
 525                 .platform_data = &gta02_buttons_pdata,
 526         },
 527 };
 528
 529 static void __init gta02_map_io(void)
 530 {
 531         s3c24xx_init_io(gta02_iodesc, ARRAY_SIZE(gta02_iodesc));
 532         s3c24xx_init_clocks(12000000);
 533         s3c24xx_init_uarts(gta02_uartcfgs, ARRAY_SIZE(gta02_uartcfgs));
 534 }
 535
 536
 537 /* These are the guys that don't need to be children of PMU. */
 538
 539 static struct platform_device *gta02_devices[] __initdata = {
 540         &s3c_device_ohci,
 541         &s3c_device_wdt,
 542         &s3c_device_sdi,
 543         &s3c_device_usbgadget,
 544         &s3c_device_nand,
 545         &gta02_nor_flash,
 546         &s3c24xx_pwm_device,
 547         &s3c_device_iis,
 548         &samsung_asoc_dma,
 549         &s3c_device_i2c0,
 550         &gta02_buttons_device,
 551 };
 552
 553 /* These guys DO need to be children of PMU. */
 554
 555 static struct platform_device *gta02_devices_pmu_children[] = {
 556 };
 557
 558
 559 /*
 560  * This is called when pc50633 is probed, quite late in the day since it is an
 561  * I2C bus device.  Here we can define platform devices with the advantage that
 562  * we can mark the pcf50633 as the parent.  This makes them get suspended and
 563  * resumed with their parent the pcf50633 still around.  All devices whose
 564  * operation depends on something from pcf50633 must have this relationship
 565  * made explicit like this, or suspend and resume will become an unreliable
 566  * hellworld.
 567  */
 568
 569 static void gta02_pmu_attach_child_devices(struct pcf50633 *pcf)
 570 {
 571         int n;
 572
 573         /* Grab a copy of the now probed PMU pointer. */
 574         gta02_pcf = pcf;
 575
 576         for (n = 0; n < ARRAY_SIZE(gta02_devices_pmu_children); n++)
 577                 gta02_devices_pmu_children[n]->dev.parent = pcf->dev;
 578
 579         platform_add_devices(gta02_devices_pmu_children,
 580                              ARRAY_SIZE(gta02_devices_pmu_children));
 581 }
 582
 583 static void gta02_poweroff(void)
 584 {
 585         pcf50633_reg_set_bit_mask(gta02_pcf, PCF50633_REG_OOCSHDWN, 1, 1);
 586 }
 587
 588 static void __init gta02_machine_init(void)
 589 {
 590         /* Set the panic callback to turn AUX LED on or off. */
 591         panic_blink = gta02_panic_blink;
 592
 593         s3c_pm_init();
 594
 595 #ifdef CONFIG_CHARGER_PCF50633
 596         INIT_DELAYED_WORK(&gta02_charger_work, gta02_charger_worker);
 597 #endif
 598
 599         s3c24xx_udc_set_platdata(&gta02_udc_cfg);
 600         s3c_ohci_set_platdata(&gta02_usb_info);
 601         s3c_nand_set_platdata(&gta02_nand_info);
 602         s3c_i2c0_set_platdata(NULL);
 603
 604         i2c_register_board_info(0, gta02_i2c_devs, ARRAY_SIZE(gta02_i2c_devs));
 605
 606         platform_add_devices(gta02_devices, ARRAY_SIZE(gta02_devices));
 607         pm_power_off = gta02_poweroff;
 608
 609         regulator_has_full_constraints();
 610 }
 611
 612
 613 MACHINE_START(NEO1973_GTA02, "GTA02")
 614         /* Maintainer: Nelson Castillo <arhuaco@freaks-unidos.net> */
 615         .boot_params    = S3C2410_SDRAM_PA + 0x100,
 616         .map_io         = gta02_map_io,
 617         .init_irq       = s3c24xx_init_irq,
 618         .init_machine   = gta02_machine_init,
 619         .timer          = &s3c24xx_timer,
 620 MACHINE_END