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 <asm/mach/arch.h>
  62 #include <asm/mach/map.h>
  63 #include <asm/mach/irq.h>
  64
  65 #include <asm/irq.h>
  66 #include <asm/mach-types.h>
  67
  68 #include <mach/regs-irq.h>
  69 #include <mach/regs-gpio.h>
  70 #include <mach/regs-gpioj.h>
  71 #include <mach/fb.h>
  72
  73 #include <mach/spi.h>
  74 #include <mach/spi-gpio.h>
  75 #include <plat/usb-control.h>
  76 #include <mach/regs-mem.h>
  77 #include <mach/hardware.h>
  78
  79 #include <mach/gta02.h>
  80
  81 #include <plat/regs-serial.h>
  82 #include <plat/nand.h>
  83 #include <plat/devs.h>
  84 #include <plat/cpu.h>
  85 #include <plat/pm.h>
  86 #include <plat/udc.h>
  87 #include <plat/gpio-cfg.h>
  88 #include <plat/iic.h>
  89
  90 static struct pcf50633 *gta02_pcf;
  91
  92 /*
  93  * This gets called frequently when we paniced.
  94  */
  95
  96 static long gta02_panic_blink(int state)
  97 {
  98         long delay = 0;
  99         char led;
 100
 101         led = (state) ? 1 : 0;
 102         gpio_direction_output(GTA02_GPIO_AUX_LED, led);
 103
 104         return delay;
 105 }
 106
 107
 108 static struct map_desc gta02_iodesc[] __initdata = {
 109         {
 110                 .virtual        = 0xe0000000,
 111                 .pfn            = __phys_to_pfn(S3C2410_CS3 + 0x01000000),
 112                 .length         = SZ_1M,
 113                 .type           = MT_DEVICE
 114         },
 115 };
 116
 117 #define UCON (S3C2410_UCON_DEFAULT | S3C2443_UCON_RXERR_IRQEN)
 118 #define ULCON (S3C2410_LCON_CS8 | S3C2410_LCON_PNONE | S3C2410_LCON_STOPB)
 119 #define UFCON (S3C2410_UFCON_RXTRIG8 | S3C2410_UFCON_FIFOMODE)
 120
 121 static struct s3c2410_uartcfg gta02_uartcfgs[] = {
 122         [0] = {
 123                 .hwport         = 0,
 124                 .flags          = 0,
 125                 .ucon           = UCON,
 126                 .ulcon          = ULCON,
 127                 .ufcon          = UFCON,
 128         },
 129         [1] = {
 130                 .hwport         = 1,
 131                 .flags          = 0,
 132                 .ucon           = UCON,
 133                 .ulcon          = ULCON,
 134                 .ufcon          = UFCON,
 135         },
 136         [2] = {
 137                 .hwport         = 2,
 138                 .flags          = 0,
 139                 .ucon           = UCON,
 140                 .ulcon          = ULCON,
 141                 .ufcon          = UFCON,
 142         },
 143 };
 144
 145 #ifdef CONFIG_CHARGER_PCF50633
 146 /*
 147  * On GTA02 the 1A charger features a 48K resistor to 0V on the ID pin.
 148  * We use this to recognize that we can pull 1A from the USB socket.
 149  *
 150  * These constants are the measured pcf50633 ADC levels with the 1A
 151  * charger / 48K resistor, and with no pulldown resistor.
 152  */
 153
 154 #define ADC_NOM_CHG_DETECT_1A 6
 155 #define ADC_NOM_CHG_DETECT_USB 43
 156
 157 static void
 158 gta02_configure_pmu_for_charger(struct pcf50633 *pcf, void *unused, int res)
 159 {
 160         int  ma;
 161
 162         /* Interpret charger type */
 163         if (res < ((ADC_NOM_CHG_DETECT_USB + ADC_NOM_CHG_DETECT_1A) / 2)) {
 164
 165                 /*
 166                  * Sanity - stop GPO driving out now that we have a 1A charger
 167                  * GPO controls USB Host power generation on GTA02
 168                  */
 169                 pcf50633_gpio_set(pcf, PCF50633_GPO, 0);
 170
 171                 ma = 1000;
 172         } else
 173                 ma = 100;
 174
 175         pcf50633_mbc_usb_curlim_set(pcf, ma);
 176 }
 177
 178 static struct delayed_work gta02_charger_work;
 179 static int gta02_usb_vbus_draw;
 180
 181 static void gta02_charger_worker(struct work_struct *work)
 182 {
 183         if (gta02_usb_vbus_draw) {
 184                 pcf50633_mbc_usb_curlim_set(gta02_pcf, gta02_usb_vbus_draw);
 185                 return;
 186         }
 187
 188 #ifdef CONFIG_PCF50633_ADC
 189         pcf50633_adc_async_read(gta02_pcf,
 190                                 PCF50633_ADCC1_MUX_ADCIN1,
 191                                 PCF50633_ADCC1_AVERAGE_16,
 192                                 gta02_configure_pmu_for_charger,
 193                                 NULL);
 194 #else
 195         /*
 196          * If the PCF50633 ADC is disabled we fallback to a
 197          * 100mA limit for safety.
 198          */
 199         pcf50633_mbc_usb_curlim_set(pcf, 100);
 200 #endif
 201 }
 202
 203 #define GTA02_CHARGER_CONFIGURE_TIMEOUT ((3000 * HZ) / 1000)
 204
 205 static void gta02_pmu_event_callback(struct pcf50633 *pcf, int irq)
 206 {
 207         if (irq == PCF50633_IRQ_USBINS) {
 208                 schedule_delayed_work(&gta02_charger_work,
 209                                       GTA02_CHARGER_CONFIGURE_TIMEOUT);
 210
 211                 return;
 212         }
 213
 214         if (irq == PCF50633_IRQ_USBREM) {
 215                 cancel_delayed_work_sync(&gta02_charger_work);
 216                 gta02_usb_vbus_draw = 0;
 217         }
 218 }
 219
 220 static void gta02_udc_vbus_draw(unsigned int ma)
 221 {
 222         if (!gta02_pcf)
 223                 return;
 224
 225         gta02_usb_vbus_draw = ma;
 226
 227         schedule_delayed_work(&gta02_charger_work,
 228                               GTA02_CHARGER_CONFIGURE_TIMEOUT);
 229 }
 230 #else /* !CONFIG_CHARGER_PCF50633 */
 231 #define gta02_pmu_event_callback        NULL
 232 #define gta02_udc_vbus_draw             NULL
 233 #endif
 234
 235 /*
 236  * This is called when pc50633 is probed, unfortunately quite late in the
 237  * day since it is an I2C bus device. Here we can belatedly define some
 238  * platform devices with the advantage that we can mark the pcf50633 as the
 239  * parent. This makes them get suspended and resumed with their parent
 240  * the pcf50633 still around.
 241  */
 242
 243 static void gta02_pmu_attach_child_devices(struct pcf50633 *pcf);
 244
 245
 246 static char *gta02_batteries[] = {
 247         "battery",
 248 };
 249
 250 static struct pcf50633_bl_platform_data gta02_backlight_data = {
 251         .default_brightness = 0x3f,
 252         .default_brightness_limit = 0,
 253         .ramp_time = 5,
 254 };
 255
 256 struct pcf50633_platform_data gta02_pcf_pdata = {
 257         .resumers = {
 258                 [0] =   PCF50633_INT1_USBINS |
 259                         PCF50633_INT1_USBREM |
 260                         PCF50633_INT1_ALARM,
 261                 [1] =   PCF50633_INT2_ONKEYF,
 262                 [2] =   PCF50633_INT3_ONKEY1S,
 263                 [3] =   PCF50633_INT4_LOWSYS |
 264                         PCF50633_INT4_LOWBAT |
 265                         PCF50633_INT4_HIGHTMP,
 266         },
 267
 268         .batteries = gta02_batteries,
 269         .num_batteries = ARRAY_SIZE(gta02_batteries),
 270
 271         .charger_reference_current_ma = 1000,
 272
 273         .backlight_data = &gta02_backlight_data,
 274
 275         .reg_init_data = {
 276                 [PCF50633_REGULATOR_AUTO] = {
 277                         .constraints = {
 278                                 .min_uV = 3300000,
 279                                 .max_uV = 3300000,
 280                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 281                                 .always_on = 1,
 282                                 .apply_uV = 1,
 283                                 .state_mem = {
 284                                         .enabled = 1,
 285                                 },
 286                         },
 287                 },
 288                 [PCF50633_REGULATOR_DOWN1] = {
 289                         .constraints = {
 290                                 .min_uV = 1300000,
 291                                 .max_uV = 1600000,
 292                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 293                                 .always_on = 1,
 294                                 .apply_uV = 1,
 295                         },
 296                 },
 297                 [PCF50633_REGULATOR_DOWN2] = {
 298                         .constraints = {
 299                                 .min_uV = 1800000,
 300                                 .max_uV = 1800000,
 301                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 302                                 .apply_uV = 1,
 303                                 .always_on = 1,
 304                                 .state_mem = {
 305                                         .enabled = 1,
 306                                 },
 307                         },
 308                 },
 309                 [PCF50633_REGULATOR_HCLDO] = {
 310                         .constraints = {
 311                                 .min_uV = 2000000,
 312                                 .max_uV = 3300000,
 313                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 314                                 .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE,
 315                                 .always_on = 1,
 316                         },
 317                 },
 318                 [PCF50633_REGULATOR_LDO1] = {
 319                         .constraints = {
 320                                 .min_uV = 3300000,
 321                                 .max_uV = 3300000,
 322                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 323                                 .apply_uV = 1,
 324                                 .state_mem = {
 325                                         .enabled = 0,
 326                                 },
 327                         },
 328                 },
 329                 [PCF50633_REGULATOR_LDO2] = {
 330                         .constraints = {
 331                                 .min_uV = 3300000,
 332                                 .max_uV = 3300000,
 333                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 334                                 .apply_uV = 1,
 335                         },
 336                 },
 337                 [PCF50633_REGULATOR_LDO3] = {
 338                         .constraints = {
 339                                 .min_uV = 3000000,
 340                                 .max_uV = 3000000,
 341                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 342                                 .apply_uV = 1,
 343                         },
 344                 },
 345                 [PCF50633_REGULATOR_LDO4] = {
 346                         .constraints = {
 347                                 .min_uV = 3200000,
 348                                 .max_uV = 3200000,
 349                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 350                                 .apply_uV = 1,
 351                         },
 352                 },
 353                 [PCF50633_REGULATOR_LDO5] = {
 354                         .constraints = {
 355                                 .min_uV = 3000000,
 356                                 .max_uV = 3000000,
 357                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 358                                 .apply_uV = 1,
 359                                 .state_mem = {
 360                                         .enabled = 1,
 361                                 },
 362                         },
 363                 },
 364                 [PCF50633_REGULATOR_LDO6] = {
 365                         .constraints = {
 366                                 .min_uV = 3000000,
 367                                 .max_uV = 3000000,
 368                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 369                         },
 370                 },
 371                 [PCF50633_REGULATOR_MEMLDO] = {
 372                         .constraints = {
 373                                 .min_uV = 1800000,
 374                                 .max_uV = 1800000,
 375                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 376                                 .state_mem = {
 377                                         .enabled = 1,
 378                                 },
 379                         },
 380                 },
 381
 382         },
 383         .probe_done = gta02_pmu_attach_child_devices,
 384         .mbc_event_callback = gta02_pmu_event_callback,
 385 };
 386
 387
 388 /* NOR Flash. */
 389
 390 #define GTA02_FLASH_BASE        0x18000000 /* GCS3 */
 391 #define GTA02_FLASH_SIZE        0x200000 /* 2MBytes */
 392
 393 static struct physmap_flash_data gta02_nor_flash_data = {
 394         .width          = 2,
 395 };
 396
 397 static struct resource gta02_nor_flash_resource = {
 398         .start          = GTA02_FLASH_BASE,
 399         .end            = GTA02_FLASH_BASE + GTA02_FLASH_SIZE - 1,
 400         .flags          = IORESOURCE_MEM,
 401 };
 402
 403 static struct platform_device gta02_nor_flash = {
 404         .name           = "physmap-flash",
 405         .id             = 0,
 406         .dev            = {
 407                 .platform_data  = &gta02_nor_flash_data,
 408         },
 409         .resource       = &gta02_nor_flash_resource,
 410         .num_resources  = 1,
 411 };
 412
 413
 414 struct platform_device s3c24xx_pwm_device = {
 415         .name           = "s3c24xx_pwm",
 416         .num_resources  = 0,
 417 };
 418
 419 static struct i2c_board_info gta02_i2c_devs[] __initdata = {
 420         {
 421                 I2C_BOARD_INFO("pcf50633", 0x73),
 422                 .irq = GTA02_IRQ_PCF50633,
 423                 .platform_data = &gta02_pcf_pdata,
 424         },
 425         {
 426                 I2C_BOARD_INFO("wm8753", 0x1a),
 427         },
 428 };
 429
 430 static struct s3c2410_nand_set __initdata gta02_nand_sets[] = {
 431         [0] = {
 432                 /*
 433                  * This name is also hard-coded in the boot loaders, so
 434                  * changing it would would require all users to upgrade
 435                  * their boot loaders, some of which are stored in a NOR
 436                  * that is considered to be immutable.
 437                  */
 438                 .name           = "neo1973-nand",
 439                 .nr_chips       = 1,
 440                 .flash_bbt      = 1,
 441         },
 442 };
 443
 444 /*
 445  * Choose a set of timings derived from S3C@2442B MCP54
 446  * data sheet (K5D2G13ACM-D075 MCP Memory).
 447  */
 448
 449 static struct s3c2410_platform_nand __initdata gta02_nand_info = {
 450         .tacls          = 0,
 451         .twrph0         = 25,
 452         .twrph1         = 15,
 453         .nr_sets        = ARRAY_SIZE(gta02_nand_sets),
 454         .sets           = gta02_nand_sets,
 455 };
 456
 457
 458 static void gta02_udc_command(enum s3c2410_udc_cmd_e cmd)
 459 {
 460         switch (cmd) {
 461         case S3C2410_UDC_P_ENABLE:
 462                 pr_debug("%s S3C2410_UDC_P_ENABLE\n", __func__);
 463                 gpio_direction_output(GTA02_GPIO_USB_PULLUP, 1);
 464                 break;
 465         case S3C2410_UDC_P_DISABLE:
 466                 pr_debug("%s S3C2410_UDC_P_DISABLE\n", __func__);
 467                 gpio_direction_output(GTA02_GPIO_USB_PULLUP, 0);
 468                 break;
 469         case S3C2410_UDC_P_RESET:
 470                 pr_debug("%s S3C2410_UDC_P_RESET\n", __func__);
 471                 /* FIXME: Do something here. */
 472         }
 473 }
 474
 475 /* Get PMU to set USB current limit accordingly. */
 476 static struct s3c2410_udc_mach_info gta02_udc_cfg = {
 477         .vbus_draw      = gta02_udc_vbus_draw,
 478         .udc_command    = gta02_udc_command,
 479
 480 };
 481
 482 /* USB */
 483 static struct s3c2410_hcd_info gta02_usb_info __initdata = {
 484         .port[0]        = {
 485                 .flags  = S3C_HCDFLG_USED,
 486         },
 487         .port[1]        = {
 488                 .flags  = 0,
 489         },
 490 };
 491
 492
 493 static void __init gta02_map_io(void)
 494 {
 495         s3c24xx_init_io(gta02_iodesc, ARRAY_SIZE(gta02_iodesc));
 496         s3c24xx_init_clocks(12000000);
 497         s3c24xx_init_uarts(gta02_uartcfgs, ARRAY_SIZE(gta02_uartcfgs));
 498 }
 499
 500
 501 /* These are the guys that don't need to be children of PMU. */
 502
 503 static struct platform_device *gta02_devices[] __initdata = {
 504         &s3c_device_ohci,
 505         &s3c_device_wdt,
 506         &s3c_device_sdi,
 507         &s3c_device_usbgadget,
 508         &s3c_device_nand,
 509         &gta02_nor_flash,
 510         &s3c24xx_pwm_device,
 511         &s3c_device_iis,
 512         &s3c_device_i2c0,
 513 };
 514
 515 /* These guys DO need to be children of PMU. */
 516
 517 static struct platform_device *gta02_devices_pmu_children[] = {
 518 };
 519
 520
 521 /*
 522  * This is called when pc50633 is probed, quite late in the day since it is an
 523  * I2C bus device.  Here we can define platform devices with the advantage that
 524  * we can mark the pcf50633 as the parent.  This makes them get suspended and
 525  * resumed with their parent the pcf50633 still around.  All devices whose
 526  * operation depends on something from pcf50633 must have this relationship
 527  * made explicit like this, or suspend and resume will become an unreliable
 528  * hellworld.
 529  */
 530
 531 static void gta02_pmu_attach_child_devices(struct pcf50633 *pcf)
 532 {
 533         int n;
 534
 535         /* Grab a copy of the now probed PMU pointer. */
 536         gta02_pcf = pcf;
 537
 538         for (n = 0; n < ARRAY_SIZE(gta02_devices_pmu_children); n++)
 539                 gta02_devices_pmu_children[n]->dev.parent = pcf->dev;
 540
 541         platform_add_devices(gta02_devices_pmu_children,
 542                              ARRAY_SIZE(gta02_devices_pmu_children));
 543 }
 544
 545 static void gta02_poweroff(void)
 546 {
 547         pcf50633_reg_set_bit_mask(gta02_pcf, PCF50633_REG_OOCSHDWN, 1, 1);
 548 }
 549
 550 static void __init gta02_machine_init(void)
 551 {
 552         /* Set the panic callback to turn AUX LED on or off. */
 553         panic_blink = gta02_panic_blink;
 554
 555         s3c_pm_init();
 556
 557 #ifdef CONFIG_CHARGER_PCF50633
 558         INIT_DELAYED_WORK(&gta02_charger_work, gta02_charger_worker);
 559 #endif
 560
 561         s3c24xx_udc_set_platdata(&gta02_udc_cfg);
 562         s3c_ohci_set_platdata(&gta02_usb_info);
 563         s3c_nand_set_platdata(&gta02_nand_info);
 564         s3c_i2c0_set_platdata(NULL);
 565
 566         i2c_register_board_info(0, gta02_i2c_devs, ARRAY_SIZE(gta02_i2c_devs));
 567
 568         platform_add_devices(gta02_devices, ARRAY_SIZE(gta02_devices));
 569         pm_power_off = gta02_poweroff;
 570 }
 571
 572
 573 MACHINE_START(NEO1973_GTA02, "GTA02")
 574         /* Maintainer: Nelson Castillo <arhuaco@freaks-unidos.net> */
 575         .boot_params    = S3C2410_SDRAM_PA + 0x100,
 576         .map_io         = gta02_map_io,
 577         .init_irq       = s3c24xx_init_irq,
 578         .init_machine   = gta02_machine_init,
 579         .timer          = &s3c24xx_timer,
 580 MACHINE_END