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

   1 // SPDX-License-Identifier: GPL-2.0+
   2 //
   3 // S3C2442 Machine Support for Openmoko GTA02 / FreeRunner.
   4 //
   5 // Copyright (C) 2006-2009 by Openmoko, Inc.
   6 // Authors: Harald Welte <laforge@openmoko.org>
   7 //          Andy Green <andy@openmoko.org>
   8 //          Werner Almesberger <werner@openmoko.org>
   9 // All rights reserved.
  10
  11 #include <linux/kernel.h>
  12 #include <linux/types.h>
  13 #include <linux/interrupt.h>
  14 #include <linux/list.h>
  15 #include <linux/delay.h>
  16 #include <linux/timer.h>
  17 #include <linux/init.h>
  18 #include <linux/gpio.h>
  19 #include <linux/gpio_keys.h>
  20 #include <linux/workqueue.h>
  21 #include <linux/platform_device.h>
  22 #include <linux/serial_core.h>
  23 #include <linux/serial_s3c.h>
  24 #include <linux/input.h>
  25 #include <linux/io.h>
  26 #include <linux/i2c.h>
  27
  28 #include <linux/mmc/host.h>
  29
  30 #include <linux/mfd/pcf50633/adc.h>
  31 #include <linux/mfd/pcf50633/backlight.h>
  32 #include <linux/mfd/pcf50633/core.h>
  33 #include <linux/mfd/pcf50633/gpio.h>
  34 #include <linux/mfd/pcf50633/mbc.h>
  35 #include <linux/mfd/pcf50633/pmic.h>
  36
  37 #include <linux/mtd/mtd.h>
  38 #include <linux/mtd/rawnand.h>
  39 #include <linux/mtd/nand_ecc.h>
  40 #include <linux/mtd/partitions.h>
  41 #include <linux/mtd/physmap.h>
  42
  43 #include <linux/regulator/machine.h>
  44
  45 #include <linux/spi/spi.h>
  46 #include <linux/spi/s3c24xx.h>
  47
  48 #include <asm/irq.h>
  49 #include <asm/mach-types.h>
  50 #include <asm/mach/arch.h>
  51 #include <asm/mach/map.h>
  52 #include <asm/mach/irq.h>
  53
  54 #include <linux/platform_data/i2c-s3c2410.h>
  55 #include <linux/platform_data/mtd-nand-s3c2410.h>
  56 #include <linux/platform_data/touchscreen-s3c2410.h>
  57 #include <linux/platform_data/usb-ohci-s3c2410.h>
  58 #include <linux/platform_data/usb-s3c2410_udc.h>
  59
  60 #include <mach/fb.h>
  61 #include <mach/hardware.h>
  62 #include <mach/regs-gpio.h>
  63 #include <mach/regs-irq.h>
  64 #include <mach/gpio-samsung.h>
  65
  66 #include <plat/cpu.h>
  67 #include <plat/devs.h>
  68 #include <plat/gpio-cfg.h>
  69 #include <plat/pm.h>
  70 #include <plat/samsung-time.h>
  71
  72 #include "common.h"
  73 #include "gta02.h"
  74
  75 static struct pcf50633 *gta02_pcf;
  76
  77 /*
  78  * This gets called frequently when we paniced.
  79  */
  80
  81 static long gta02_panic_blink(int state)
  82 {
  83         long delay = 0;
  84         char led;
  85
  86         led = (state) ? 1 : 0;
  87         gpio_direction_output(GTA02_GPIO_AUX_LED, led);
  88
  89         return delay;
  90 }
  91
  92
  93 static struct map_desc gta02_iodesc[] __initdata = {
  94         {
  95                 .virtual        = 0xe0000000,
  96                 .pfn            = __phys_to_pfn(S3C2410_CS3 + 0x01000000),
  97                 .length         = SZ_1M,
  98                 .type           = MT_DEVICE
  99         },
 100 };
 101
 102 #define UCON (S3C2410_UCON_DEFAULT | S3C2443_UCON_RXERR_IRQEN)
 103 #define ULCON (S3C2410_LCON_CS8 | S3C2410_LCON_PNONE | S3C2410_LCON_STOPB)
 104 #define UFCON (S3C2410_UFCON_RXTRIG8 | S3C2410_UFCON_FIFOMODE)
 105
 106 static struct s3c2410_uartcfg gta02_uartcfgs[] = {
 107         [0] = {
 108                 .hwport         = 0,
 109                 .flags          = 0,
 110                 .ucon           = UCON,
 111                 .ulcon          = ULCON,
 112                 .ufcon          = UFCON,
 113         },
 114         [1] = {
 115                 .hwport         = 1,
 116                 .flags          = 0,
 117                 .ucon           = UCON,
 118                 .ulcon          = ULCON,
 119                 .ufcon          = UFCON,
 120         },
 121         [2] = {
 122                 .hwport         = 2,
 123                 .flags          = 0,
 124                 .ucon           = UCON,
 125                 .ulcon          = ULCON,
 126                 .ufcon          = UFCON,
 127         },
 128 };
 129
 130 #ifdef CONFIG_CHARGER_PCF50633
 131 /*
 132  * On GTA02 the 1A charger features a 48K resistor to 0V on the ID pin.
 133  * We use this to recognize that we can pull 1A from the USB socket.
 134  *
 135  * These constants are the measured pcf50633 ADC levels with the 1A
 136  * charger / 48K resistor, and with no pulldown resistor.
 137  */
 138
 139 #define ADC_NOM_CHG_DETECT_1A 6
 140 #define ADC_NOM_CHG_DETECT_USB 43
 141
 142 #ifdef CONFIG_PCF50633_ADC
 143 static void
 144 gta02_configure_pmu_for_charger(struct pcf50633 *pcf, void *unused, int res)
 145 {
 146         int  ma;
 147
 148         /* Interpret charger type */
 149         if (res < ((ADC_NOM_CHG_DETECT_USB + ADC_NOM_CHG_DETECT_1A) / 2)) {
 150
 151                 /*
 152                  * Sanity - stop GPO driving out now that we have a 1A charger
 153                  * GPO controls USB Host power generation on GTA02
 154                  */
 155                 pcf50633_gpio_set(pcf, PCF50633_GPO, 0);
 156
 157                 ma = 1000;
 158         } else
 159                 ma = 100;
 160
 161         pcf50633_mbc_usb_curlim_set(pcf, ma);
 162 }
 163 #endif
 164
 165 static struct delayed_work gta02_charger_work;
 166 static int gta02_usb_vbus_draw;
 167
 168 static void gta02_charger_worker(struct work_struct *work)
 169 {
 170         if (gta02_usb_vbus_draw) {
 171                 pcf50633_mbc_usb_curlim_set(gta02_pcf, gta02_usb_vbus_draw);
 172                 return;
 173         }
 174
 175 #ifdef CONFIG_PCF50633_ADC
 176         pcf50633_adc_async_read(gta02_pcf,
 177                                 PCF50633_ADCC1_MUX_ADCIN1,
 178                                 PCF50633_ADCC1_AVERAGE_16,
 179                                 gta02_configure_pmu_for_charger,
 180                                 NULL);
 181 #else
 182         /*
 183          * If the PCF50633 ADC is disabled we fallback to a
 184          * 100mA limit for safety.
 185          */
 186         pcf50633_mbc_usb_curlim_set(gta02_pcf, 100);
 187 #endif
 188 }
 189
 190 #define GTA02_CHARGER_CONFIGURE_TIMEOUT ((3000 * HZ) / 1000)
 191
 192 static void gta02_pmu_event_callback(struct pcf50633 *pcf, int irq)
 193 {
 194         if (irq == PCF50633_IRQ_USBINS) {
 195                 schedule_delayed_work(&gta02_charger_work,
 196                                       GTA02_CHARGER_CONFIGURE_TIMEOUT);
 197
 198                 return;
 199         }
 200
 201         if (irq == PCF50633_IRQ_USBREM) {
 202                 cancel_delayed_work_sync(&gta02_charger_work);
 203                 gta02_usb_vbus_draw = 0;
 204         }
 205 }
 206
 207 static void gta02_udc_vbus_draw(unsigned int ma)
 208 {
 209         if (!gta02_pcf)
 210                 return;
 211
 212         gta02_usb_vbus_draw = ma;
 213
 214         schedule_delayed_work(&gta02_charger_work,
 215                               GTA02_CHARGER_CONFIGURE_TIMEOUT);
 216 }
 217 #else /* !CONFIG_CHARGER_PCF50633 */
 218 #define gta02_pmu_event_callback        NULL
 219 #define gta02_udc_vbus_draw             NULL
 220 #endif
 221
 222 static char *gta02_batteries[] = {
 223         "battery",
 224 };
 225
 226 static struct pcf50633_bl_platform_data gta02_backlight_data = {
 227         .default_brightness = 0x3f,
 228         .default_brightness_limit = 0,
 229         .ramp_time = 5,
 230 };
 231
 232 static struct pcf50633_platform_data gta02_pcf_pdata = {
 233         .resumers = {
 234                 [0] =   PCF50633_INT1_USBINS |
 235                         PCF50633_INT1_USBREM |
 236                         PCF50633_INT1_ALARM,
 237                 [1] =   PCF50633_INT2_ONKEYF,
 238                 [2] =   PCF50633_INT3_ONKEY1S,
 239                 [3] =   PCF50633_INT4_LOWSYS |
 240                         PCF50633_INT4_LOWBAT |
 241                         PCF50633_INT4_HIGHTMP,
 242         },
 243
 244         .batteries = gta02_batteries,
 245         .num_batteries = ARRAY_SIZE(gta02_batteries),
 246
 247         .charger_reference_current_ma = 1000,
 248
 249         .backlight_data = &gta02_backlight_data,
 250
 251         .reg_init_data = {
 252                 [PCF50633_REGULATOR_AUTO] = {
 253                         .constraints = {
 254                                 .min_uV = 3300000,
 255                                 .max_uV = 3300000,
 256                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 257                                 .always_on = 1,
 258                                 .apply_uV = 1,
 259                         },
 260                 },
 261                 [PCF50633_REGULATOR_DOWN1] = {
 262                         .constraints = {
 263                                 .min_uV = 1300000,
 264                                 .max_uV = 1600000,
 265                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 266                                 .always_on = 1,
 267                                 .apply_uV = 1,
 268                         },
 269                 },
 270                 [PCF50633_REGULATOR_DOWN2] = {
 271                         .constraints = {
 272                                 .min_uV = 1800000,
 273                                 .max_uV = 1800000,
 274                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 275                                 .apply_uV = 1,
 276                                 .always_on = 1,
 277                         },
 278                 },
 279                 [PCF50633_REGULATOR_HCLDO] = {
 280                         .constraints = {
 281                                 .min_uV = 2000000,
 282                                 .max_uV = 3300000,
 283                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 284                                 .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
 285                                                 REGULATOR_CHANGE_STATUS,
 286                         },
 287                 },
 288                 [PCF50633_REGULATOR_LDO1] = {
 289                         .constraints = {
 290                                 .min_uV = 3300000,
 291                                 .max_uV = 3300000,
 292                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 293                                 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
 294                                 .apply_uV = 1,
 295                         },
 296                 },
 297                 [PCF50633_REGULATOR_LDO2] = {
 298                         .constraints = {
 299                                 .min_uV = 3300000,
 300                                 .max_uV = 3300000,
 301                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 302                                 .apply_uV = 1,
 303                         },
 304                 },
 305                 [PCF50633_REGULATOR_LDO3] = {
 306                         .constraints = {
 307                                 .min_uV = 3000000,
 308                                 .max_uV = 3000000,
 309                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 310                                 .apply_uV = 1,
 311                         },
 312                 },
 313                 [PCF50633_REGULATOR_LDO4] = {
 314                         .constraints = {
 315                                 .min_uV = 3200000,
 316                                 .max_uV = 3200000,
 317                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 318                                 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
 319                                 .apply_uV = 1,
 320                         },
 321                 },
 322                 [PCF50633_REGULATOR_LDO5] = {
 323                         .constraints = {
 324                                 .min_uV = 3000000,
 325                                 .max_uV = 3000000,
 326                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 327                                 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
 328                                 .apply_uV = 1,
 329                         },
 330                 },
 331                 [PCF50633_REGULATOR_LDO6] = {
 332                         .constraints = {
 333                                 .min_uV = 3000000,
 334                                 .max_uV = 3000000,
 335                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 336                         },
 337                 },
 338                 [PCF50633_REGULATOR_MEMLDO] = {
 339                         .constraints = {
 340                                 .min_uV = 1800000,
 341                                 .max_uV = 1800000,
 342                                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 343                         },
 344                 },
 345
 346         },
 347         .mbc_event_callback = gta02_pmu_event_callback,
 348 };
 349
 350
 351 /* NOR Flash. */
 352
 353 #define GTA02_FLASH_BASE        0x18000000 /* GCS3 */
 354 #define GTA02_FLASH_SIZE        0x200000 /* 2MBytes */
 355
 356 static struct physmap_flash_data gta02_nor_flash_data = {
 357         .width          = 2,
 358 };
 359
 360 static struct resource gta02_nor_flash_resource =
 361         DEFINE_RES_MEM(GTA02_FLASH_BASE, GTA02_FLASH_SIZE);
 362
 363 static struct platform_device gta02_nor_flash = {
 364         .name           = "physmap-flash",
 365         .id             = 0,
 366         .dev            = {
 367                 .platform_data  = &gta02_nor_flash_data,
 368         },
 369         .resource       = &gta02_nor_flash_resource,
 370         .num_resources  = 1,
 371 };
 372
 373
 374 static struct platform_device s3c24xx_pwm_device = {
 375         .name           = "s3c24xx_pwm",
 376         .num_resources  = 0,
 377 };
 378
 379 static struct platform_device gta02_dfbmcs320_device = {
 380         .name = "dfbmcs320",
 381 };
 382
 383 static struct i2c_board_info gta02_i2c_devs[] __initdata = {
 384         {
 385                 I2C_BOARD_INFO("pcf50633", 0x73),
 386                 .irq = GTA02_IRQ_PCF50633,
 387                 .platform_data = &gta02_pcf_pdata,
 388         },
 389         {
 390                 I2C_BOARD_INFO("wm8753", 0x1a),
 391         },
 392 };
 393
 394 static struct s3c2410_nand_set __initdata gta02_nand_sets[] = {
 395         [0] = {
 396                 /*
 397                  * This name is also hard-coded in the boot loaders, so
 398                  * changing it would would require all users to upgrade
 399                  * their boot loaders, some of which are stored in a NOR
 400                  * that is considered to be immutable.
 401                  */
 402                 .name           = "neo1973-nand",
 403                 .nr_chips       = 1,
 404                 .flash_bbt      = 1,
 405         },
 406 };
 407
 408 /*
 409  * Choose a set of timings derived from S3C@2442B MCP54
 410  * data sheet (K5D2G13ACM-D075 MCP Memory).
 411  */
 412
 413 static struct s3c2410_platform_nand __initdata gta02_nand_info = {
 414         .tacls          = 0,
 415         .twrph0         = 25,
 416         .twrph1         = 15,
 417         .nr_sets        = ARRAY_SIZE(gta02_nand_sets),
 418         .sets           = gta02_nand_sets,
 419         .ecc_mode       = NAND_ECC_SOFT,
 420 };
 421
 422
 423 /* Get PMU to set USB current limit accordingly. */
 424 static struct s3c2410_udc_mach_info gta02_udc_cfg __initdata = {
 425         .vbus_draw      = gta02_udc_vbus_draw,
 426         .pullup_pin = GTA02_GPIO_USB_PULLUP,
 427 };
 428
 429 /* USB */
 430 static struct s3c2410_hcd_info gta02_usb_info __initdata = {
 431         .port[0]        = {
 432                 .flags  = S3C_HCDFLG_USED,
 433         },
 434         .port[1]        = {
 435                 .flags  = 0,
 436         },
 437 };
 438
 439 /* Touchscreen */
 440 static struct s3c2410_ts_mach_info gta02_ts_info = {
 441         .delay                  = 10000,
 442         .presc                  = 0xff, /* slow as we can go */
 443         .oversampling_shift     = 2,
 444 };
 445
 446 /* Buttons */
 447 static struct gpio_keys_button gta02_buttons[] = {
 448         {
 449                 .gpio = GTA02_GPIO_AUX_KEY,
 450                 .code = KEY_PHONE,
 451                 .desc = "Aux",
 452                 .type = EV_KEY,
 453                 .debounce_interval = 100,
 454         },
 455         {
 456                 .gpio = GTA02_GPIO_HOLD_KEY,
 457                 .code = KEY_PAUSE,
 458                 .desc = "Hold",
 459                 .type = EV_KEY,
 460                 .debounce_interval = 100,
 461         },
 462 };
 463
 464 static struct gpio_keys_platform_data gta02_buttons_pdata = {
 465         .buttons = gta02_buttons,
 466         .nbuttons = ARRAY_SIZE(gta02_buttons),
 467 };
 468
 469 static struct platform_device gta02_buttons_device = {
 470         .name = "gpio-keys",
 471         .id = -1,
 472         .dev = {
 473                 .platform_data = &gta02_buttons_pdata,
 474         },
 475 };
 476
 477 static void __init gta02_map_io(void)
 478 {
 479         s3c24xx_init_io(gta02_iodesc, ARRAY_SIZE(gta02_iodesc));
 480         s3c24xx_init_uarts(gta02_uartcfgs, ARRAY_SIZE(gta02_uartcfgs));
 481         samsung_set_timer_source(SAMSUNG_PWM3, SAMSUNG_PWM4);
 482 }
 483
 484
 485 /* These are the guys that don't need to be children of PMU. */
 486
 487 static struct platform_device *gta02_devices[] __initdata = {
 488         &s3c_device_ohci,
 489         &s3c_device_wdt,
 490         &s3c_device_sdi,
 491         &s3c_device_usbgadget,
 492         &s3c_device_nand,
 493         &gta02_nor_flash,
 494         &s3c24xx_pwm_device,
 495         &s3c_device_iis,
 496         &s3c_device_i2c0,
 497         &gta02_dfbmcs320_device,
 498         &gta02_buttons_device,
 499         &s3c_device_adc,
 500         &s3c_device_ts,
 501 };
 502
 503 static void gta02_poweroff(void)
 504 {
 505         pcf50633_reg_set_bit_mask(gta02_pcf, PCF50633_REG_OOCSHDWN, 1, 1);
 506 }
 507
 508 static void __init gta02_machine_init(void)
 509 {
 510         /* Set the panic callback to turn AUX LED on or off. */
 511         panic_blink = gta02_panic_blink;
 512
 513         s3c_pm_init();
 514
 515 #ifdef CONFIG_CHARGER_PCF50633
 516         INIT_DELAYED_WORK(&gta02_charger_work, gta02_charger_worker);
 517 #endif
 518
 519         s3c24xx_udc_set_platdata(&gta02_udc_cfg);
 520         s3c24xx_ts_set_platdata(&gta02_ts_info);
 521         s3c_ohci_set_platdata(&gta02_usb_info);
 522         s3c_nand_set_platdata(&gta02_nand_info);
 523         s3c_i2c0_set_platdata(NULL);
 524
 525         i2c_register_board_info(0, gta02_i2c_devs, ARRAY_SIZE(gta02_i2c_devs));
 526
 527         platform_add_devices(gta02_devices, ARRAY_SIZE(gta02_devices));
 528         pm_power_off = gta02_poweroff;
 529
 530         regulator_has_full_constraints();
 531 }
 532
 533 static void __init gta02_init_time(void)
 534 {
 535         s3c2442_init_clocks(12000000);
 536         samsung_timer_init();
 537 }
 538
 539 MACHINE_START(NEO1973_GTA02, "GTA02")
 540         /* Maintainer: Nelson Castillo <arhuaco@freaks-unidos.net> */
 541         .atag_offset    = 0x100,
 542         .map_io         = gta02_map_io,
 543         .init_irq       = s3c2442_init_irq,
 544         .init_machine   = gta02_machine_init,
 545         .init_time      = gta02_init_time,
 546 MACHINE_END