linux/arch/arm/mach-s3c/mach-gta02.c
<<
>>
Prefs
   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/machine.h>
  19#include <linux/gpio.h>
  20#include <linux/gpio_keys.h>
  21#include <linux/workqueue.h>
  22#include <linux/platform_device.h>
  23#include <linux/serial_core.h>
  24#include <linux/serial_s3c.h>
  25#include <linux/input.h>
  26#include <linux/io.h>
  27#include <linux/i2c.h>
  28
  29#include <linux/mmc/host.h>
  30
  31#include <linux/mfd/pcf50633/adc.h>
  32#include <linux/mfd/pcf50633/backlight.h>
  33#include <linux/mfd/pcf50633/core.h>
  34#include <linux/mfd/pcf50633/gpio.h>
  35#include <linux/mfd/pcf50633/mbc.h>
  36#include <linux/mfd/pcf50633/pmic.h>
  37
  38#include <linux/mtd/mtd.h>
  39#include <linux/mtd/rawnand.h>
  40#include <linux/mtd/nand-ecc-sw-hamming.h>
  41#include <linux/mtd/partitions.h>
  42#include <linux/mtd/physmap.h>
  43
  44#include <linux/regulator/machine.h>
  45
  46#include <linux/spi/spi.h>
  47#include <linux/spi/s3c24xx.h>
  48
  49#include <asm/irq.h>
  50#include <asm/mach-types.h>
  51#include <asm/mach/arch.h>
  52#include <asm/mach/map.h>
  53#include <asm/mach/irq.h>
  54
  55#include <linux/platform_data/i2c-s3c2410.h>
  56#include <linux/platform_data/mtd-nand-s3c2410.h>
  57#include <linux/platform_data/touchscreen-s3c2410.h>
  58#include <linux/platform_data/usb-ohci-s3c2410.h>
  59#include <linux/platform_data/usb-s3c2410_udc.h>
  60#include <linux/platform_data/fb-s3c2410.h>
  61
  62#include "regs-gpio.h"
  63#include "regs-irq.h"
  64#include "gpio-samsung.h"
  65
  66#include "cpu.h"
  67#include "devs.h"
  68#include "gpio-cfg.h"
  69#include "pm.h"
  70
  71#include "s3c24xx.h"
  72#include "gta02.h"
  73
  74static struct pcf50633 *gta02_pcf;
  75
  76/*
  77 * This gets called frequently when we paniced.
  78 */
  79
  80static long gta02_panic_blink(int state)
  81{
  82        long delay = 0;
  83        char led;
  84
  85        led = (state) ? 1 : 0;
  86        gpio_direction_output(GTA02_GPIO_AUX_LED, led);
  87
  88        return delay;
  89}
  90
  91
  92static struct map_desc gta02_iodesc[] __initdata = {
  93        {
  94                .virtual        = 0xe0000000,
  95                .pfn            = __phys_to_pfn(S3C2410_CS3 + 0x01000000),
  96                .length         = SZ_1M,
  97                .type           = MT_DEVICE
  98        },
  99};
 100
 101#define UCON (S3C2410_UCON_DEFAULT | S3C2443_UCON_RXERR_IRQEN)
 102#define ULCON (S3C2410_LCON_CS8 | S3C2410_LCON_PNONE | S3C2410_LCON_STOPB)
 103#define UFCON (S3C2410_UFCON_RXTRIG8 | S3C2410_UFCON_FIFOMODE)
 104
 105static struct s3c2410_uartcfg gta02_uartcfgs[] = {
 106        [0] = {
 107                .hwport         = 0,
 108                .flags          = 0,
 109                .ucon           = UCON,
 110                .ulcon          = ULCON,
 111                .ufcon          = UFCON,
 112        },
 113        [1] = {
 114                .hwport         = 1,
 115                .flags          = 0,
 116                .ucon           = UCON,
 117                .ulcon          = ULCON,
 118                .ufcon          = UFCON,
 119        },
 120        [2] = {
 121                .hwport         = 2,
 122                .flags          = 0,
 123                .ucon           = UCON,
 124                .ulcon          = ULCON,
 125                .ufcon          = UFCON,
 126        },
 127};
 128
 129#ifdef CONFIG_CHARGER_PCF50633
 130/*
 131 * On GTA02 the 1A charger features a 48K resistor to 0V on the ID pin.
 132 * We use this to recognize that we can pull 1A from the USB socket.
 133 *
 134 * These constants are the measured pcf50633 ADC levels with the 1A
 135 * charger / 48K resistor, and with no pulldown resistor.
 136 */
 137
 138#define ADC_NOM_CHG_DETECT_1A 6
 139#define ADC_NOM_CHG_DETECT_USB 43
 140
 141#ifdef CONFIG_PCF50633_ADC
 142static void
 143gta02_configure_pmu_for_charger(struct pcf50633 *pcf, void *unused, int res)
 144{
 145        int  ma;
 146
 147        /* Interpret charger type */
 148        if (res < ((ADC_NOM_CHG_DETECT_USB + ADC_NOM_CHG_DETECT_1A) / 2)) {
 149
 150                /*
 151                 * Sanity - stop GPO driving out now that we have a 1A charger
 152                 * GPO controls USB Host power generation on GTA02
 153                 */
 154                pcf50633_gpio_set(pcf, PCF50633_GPO, 0);
 155
 156                ma = 1000;
 157        } else
 158                ma = 100;
 159
 160        pcf50633_mbc_usb_curlim_set(pcf, ma);
 161}
 162#endif
 163
 164static struct delayed_work gta02_charger_work;
 165static int gta02_usb_vbus_draw;
 166
 167static void gta02_charger_worker(struct work_struct *work)
 168{
 169        if (gta02_usb_vbus_draw) {
 170                pcf50633_mbc_usb_curlim_set(gta02_pcf, gta02_usb_vbus_draw);
 171                return;
 172        }
 173
 174#ifdef CONFIG_PCF50633_ADC
 175        pcf50633_adc_async_read(gta02_pcf,
 176                                PCF50633_ADCC1_MUX_ADCIN1,
 177                                PCF50633_ADCC1_AVERAGE_16,
 178                                gta02_configure_pmu_for_charger,
 179                                NULL);
 180#else
 181        /*
 182         * If the PCF50633 ADC is disabled we fallback to a
 183         * 100mA limit for safety.
 184         */
 185        pcf50633_mbc_usb_curlim_set(gta02_pcf, 100);
 186#endif
 187}
 188
 189#define GTA02_CHARGER_CONFIGURE_TIMEOUT ((3000 * HZ) / 1000)
 190
 191static void gta02_pmu_event_callback(struct pcf50633 *pcf, int irq)
 192{
 193        if (irq == PCF50633_IRQ_USBINS) {
 194                schedule_delayed_work(&gta02_charger_work,
 195                                      GTA02_CHARGER_CONFIGURE_TIMEOUT);
 196
 197                return;
 198        }
 199
 200        if (irq == PCF50633_IRQ_USBREM) {
 201                cancel_delayed_work_sync(&gta02_charger_work);
 202                gta02_usb_vbus_draw = 0;
 203        }
 204}
 205
 206static void gta02_udc_vbus_draw(unsigned int ma)
 207{
 208        if (!gta02_pcf)
 209                return;
 210
 211        gta02_usb_vbus_draw = ma;
 212
 213        schedule_delayed_work(&gta02_charger_work,
 214                              GTA02_CHARGER_CONFIGURE_TIMEOUT);
 215}
 216#else /* !CONFIG_CHARGER_PCF50633 */
 217#define gta02_pmu_event_callback        NULL
 218#define gta02_udc_vbus_draw             NULL
 219#endif
 220
 221static char *gta02_batteries[] = {
 222        "battery",
 223};
 224
 225static struct pcf50633_bl_platform_data gta02_backlight_data = {
 226        .default_brightness = 0x3f,
 227        .default_brightness_limit = 0,
 228        .ramp_time = 5,
 229};
 230
 231static struct pcf50633_platform_data gta02_pcf_pdata = {
 232        .resumers = {
 233                [0] =   PCF50633_INT1_USBINS |
 234                        PCF50633_INT1_USBREM |
 235                        PCF50633_INT1_ALARM,
 236                [1] =   PCF50633_INT2_ONKEYF,
 237                [2] =   PCF50633_INT3_ONKEY1S,
 238                [3] =   PCF50633_INT4_LOWSYS |
 239                        PCF50633_INT4_LOWBAT |
 240                        PCF50633_INT4_HIGHTMP,
 241        },
 242
 243        .batteries = gta02_batteries,
 244        .num_batteries = ARRAY_SIZE(gta02_batteries),
 245
 246        .charger_reference_current_ma = 1000,
 247
 248        .backlight_data = &gta02_backlight_data,
 249
 250        .reg_init_data = {
 251                [PCF50633_REGULATOR_AUTO] = {
 252                        .constraints = {
 253                                .min_uV = 3300000,
 254                                .max_uV = 3300000,
 255                                .valid_modes_mask = REGULATOR_MODE_NORMAL,
 256                                .always_on = 1,
 257                                .apply_uV = 1,
 258                        },
 259                },
 260                [PCF50633_REGULATOR_DOWN1] = {
 261                        .constraints = {
 262                                .min_uV = 1300000,
 263                                .max_uV = 1600000,
 264                                .valid_modes_mask = REGULATOR_MODE_NORMAL,
 265                                .always_on = 1,
 266                                .apply_uV = 1,
 267                        },
 268                },
 269                [PCF50633_REGULATOR_DOWN2] = {
 270                        .constraints = {
 271                                .min_uV = 1800000,
 272                                .max_uV = 1800000,
 273                                .valid_modes_mask = REGULATOR_MODE_NORMAL,
 274                                .apply_uV = 1,
 275                                .always_on = 1,
 276                        },
 277                },
 278                [PCF50633_REGULATOR_HCLDO] = {
 279                        .constraints = {
 280                                .min_uV = 2000000,
 281                                .max_uV = 3300000,
 282                                .valid_modes_mask = REGULATOR_MODE_NORMAL,
 283                                .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
 284                                                REGULATOR_CHANGE_STATUS,
 285                        },
 286                },
 287                [PCF50633_REGULATOR_LDO1] = {
 288                        .constraints = {
 289                                .min_uV = 3300000,
 290                                .max_uV = 3300000,
 291                                .valid_modes_mask = REGULATOR_MODE_NORMAL,
 292                                .valid_ops_mask = REGULATOR_CHANGE_STATUS,
 293                                .apply_uV = 1,
 294                        },
 295                },
 296                [PCF50633_REGULATOR_LDO2] = {
 297                        .constraints = {
 298                                .min_uV = 3300000,
 299                                .max_uV = 3300000,
 300                                .valid_modes_mask = REGULATOR_MODE_NORMAL,
 301                                .apply_uV = 1,
 302                        },
 303                },
 304                [PCF50633_REGULATOR_LDO3] = {
 305                        .constraints = {
 306                                .min_uV = 3000000,
 307                                .max_uV = 3000000,
 308                                .valid_modes_mask = REGULATOR_MODE_NORMAL,
 309                                .apply_uV = 1,
 310                        },
 311                },
 312                [PCF50633_REGULATOR_LDO4] = {
 313                        .constraints = {
 314                                .min_uV = 3200000,
 315                                .max_uV = 3200000,
 316                                .valid_modes_mask = REGULATOR_MODE_NORMAL,
 317                                .valid_ops_mask = REGULATOR_CHANGE_STATUS,
 318                                .apply_uV = 1,
 319                        },
 320                },
 321                [PCF50633_REGULATOR_LDO5] = {
 322                        .constraints = {
 323                                .min_uV = 3000000,
 324                                .max_uV = 3000000,
 325                                .valid_modes_mask = REGULATOR_MODE_NORMAL,
 326                                .valid_ops_mask = REGULATOR_CHANGE_STATUS,
 327                                .apply_uV = 1,
 328                        },
 329                },
 330                [PCF50633_REGULATOR_LDO6] = {
 331                        .constraints = {
 332                                .min_uV = 3000000,
 333                                .max_uV = 3000000,
 334                                .valid_modes_mask = REGULATOR_MODE_NORMAL,
 335                        },
 336                },
 337                [PCF50633_REGULATOR_MEMLDO] = {
 338                        .constraints = {
 339                                .min_uV = 1800000,
 340                                .max_uV = 1800000,
 341                                .valid_modes_mask = REGULATOR_MODE_NORMAL,
 342                        },
 343                },
 344
 345        },
 346        .mbc_event_callback = gta02_pmu_event_callback,
 347};
 348
 349
 350/* NOR Flash. */
 351
 352#define GTA02_FLASH_BASE        0x18000000 /* GCS3 */
 353#define GTA02_FLASH_SIZE        0x200000 /* 2MBytes */
 354
 355static struct physmap_flash_data gta02_nor_flash_data = {
 356        .width          = 2,
 357};
 358
 359static struct resource gta02_nor_flash_resource =
 360        DEFINE_RES_MEM(GTA02_FLASH_BASE, GTA02_FLASH_SIZE);
 361
 362static struct platform_device gta02_nor_flash = {
 363        .name           = "physmap-flash",
 364        .id             = 0,
 365        .dev            = {
 366                .platform_data  = &gta02_nor_flash_data,
 367        },
 368        .resource       = &gta02_nor_flash_resource,
 369        .num_resources  = 1,
 370};
 371
 372
 373static struct platform_device s3c24xx_pwm_device = {
 374        .name           = "s3c24xx_pwm",
 375        .num_resources  = 0,
 376};
 377
 378static struct platform_device gta02_dfbmcs320_device = {
 379        .name = "dfbmcs320",
 380};
 381
 382static struct i2c_board_info gta02_i2c_devs[] __initdata = {
 383        {
 384                I2C_BOARD_INFO("pcf50633", 0x73),
 385                .irq = GTA02_IRQ_PCF50633,
 386                .platform_data = &gta02_pcf_pdata,
 387        },
 388        {
 389                I2C_BOARD_INFO("wm8753", 0x1a),
 390        },
 391};
 392
 393static struct s3c2410_nand_set __initdata gta02_nand_sets[] = {
 394        [0] = {
 395                /*
 396                 * This name is also hard-coded in the boot loaders, so
 397                 * changing it would would require all users to upgrade
 398                 * their boot loaders, some of which are stored in a NOR
 399                 * that is considered to be immutable.
 400                 */
 401                .name           = "neo1973-nand",
 402                .nr_chips       = 1,
 403                .flash_bbt      = 1,
 404        },
 405};
 406
 407/*
 408 * Choose a set of timings derived from S3C@2442B MCP54
 409 * data sheet (K5D2G13ACM-D075 MCP Memory).
 410 */
 411
 412static struct s3c2410_platform_nand __initdata gta02_nand_info = {
 413        .tacls          = 0,
 414        .twrph0         = 25,
 415        .twrph1         = 15,
 416        .nr_sets        = ARRAY_SIZE(gta02_nand_sets),
 417        .sets           = gta02_nand_sets,
 418        .engine_type    = NAND_ECC_ENGINE_TYPE_SOFT,
 419};
 420
 421
 422/* Get PMU to set USB current limit accordingly. */
 423static struct s3c2410_udc_mach_info gta02_udc_cfg __initdata = {
 424        .vbus_draw      = gta02_udc_vbus_draw,
 425        .pullup_pin = GTA02_GPIO_USB_PULLUP,
 426};
 427
 428/* USB */
 429static struct s3c2410_hcd_info gta02_usb_info __initdata = {
 430        .port[0]        = {
 431                .flags  = S3C_HCDFLG_USED,
 432        },
 433        .port[1]        = {
 434                .flags  = 0,
 435        },
 436};
 437
 438/* Touchscreen */
 439static struct s3c2410_ts_mach_info gta02_ts_info = {
 440        .delay                  = 10000,
 441        .presc                  = 0xff, /* slow as we can go */
 442        .oversampling_shift     = 2,
 443};
 444
 445/* Buttons */
 446static struct gpio_keys_button gta02_buttons[] = {
 447        {
 448                .gpio = GTA02_GPIO_AUX_KEY,
 449                .code = KEY_PHONE,
 450                .desc = "Aux",
 451                .type = EV_KEY,
 452                .debounce_interval = 100,
 453        },
 454        {
 455                .gpio = GTA02_GPIO_HOLD_KEY,
 456                .code = KEY_PAUSE,
 457                .desc = "Hold",
 458                .type = EV_KEY,
 459                .debounce_interval = 100,
 460        },
 461};
 462
 463static struct gpio_keys_platform_data gta02_buttons_pdata = {
 464        .buttons = gta02_buttons,
 465        .nbuttons = ARRAY_SIZE(gta02_buttons),
 466};
 467
 468static struct platform_device gta02_buttons_device = {
 469        .name = "gpio-keys",
 470        .id = -1,
 471        .dev = {
 472                .platform_data = &gta02_buttons_pdata,
 473        },
 474};
 475
 476static struct gpiod_lookup_table gta02_audio_gpio_table = {
 477        .dev_id = "neo1973-audio",
 478        .table = {
 479                GPIO_LOOKUP("GPIOJ", 2, "amp-shut", GPIO_ACTIVE_HIGH),
 480                GPIO_LOOKUP("GPIOJ", 1, "hp", GPIO_ACTIVE_HIGH),
 481                { },
 482        },
 483};
 484
 485static struct platform_device gta02_audio = {
 486        .name = "neo1973-audio",
 487        .id = -1,
 488};
 489
 490static struct gpiod_lookup_table gta02_mmc_gpio_table = {
 491        .dev_id = "s3c2410-sdi",
 492        .table = {
 493                /* bus pins */
 494                GPIO_LOOKUP_IDX("GPIOE",  5, "bus", 0, GPIO_ACTIVE_HIGH),
 495                GPIO_LOOKUP_IDX("GPIOE",  6, "bus", 1, GPIO_ACTIVE_HIGH),
 496                GPIO_LOOKUP_IDX("GPIOE",  7, "bus", 2, GPIO_ACTIVE_HIGH),
 497                GPIO_LOOKUP_IDX("GPIOE",  8, "bus", 3, GPIO_ACTIVE_HIGH),
 498                GPIO_LOOKUP_IDX("GPIOE",  9, "bus", 4, GPIO_ACTIVE_HIGH),
 499                GPIO_LOOKUP_IDX("GPIOE", 10, "bus", 5, GPIO_ACTIVE_HIGH),
 500                { },
 501        },
 502};
 503
 504static void __init gta02_map_io(void)
 505{
 506        s3c24xx_init_io(gta02_iodesc, ARRAY_SIZE(gta02_iodesc));
 507        s3c24xx_init_uarts(gta02_uartcfgs, ARRAY_SIZE(gta02_uartcfgs));
 508        s3c24xx_set_timer_source(S3C24XX_PWM3, S3C24XX_PWM4);
 509}
 510
 511
 512/* These are the guys that don't need to be children of PMU. */
 513
 514static struct platform_device *gta02_devices[] __initdata = {
 515        &s3c_device_ohci,
 516        &s3c_device_wdt,
 517        &s3c_device_sdi,
 518        &s3c_device_usbgadget,
 519        &s3c_device_nand,
 520        &gta02_nor_flash,
 521        &s3c24xx_pwm_device,
 522        &s3c_device_iis,
 523        &s3c_device_i2c0,
 524        &gta02_dfbmcs320_device,
 525        &gta02_buttons_device,
 526        &s3c_device_adc,
 527        &s3c_device_ts,
 528        &gta02_audio,
 529};
 530
 531static void gta02_poweroff(void)
 532{
 533        pcf50633_reg_set_bit_mask(gta02_pcf, PCF50633_REG_OOCSHDWN, 1, 1);
 534}
 535
 536static void __init gta02_machine_init(void)
 537{
 538        /* Set the panic callback to turn AUX LED on or off. */
 539        panic_blink = gta02_panic_blink;
 540
 541        s3c_pm_init();
 542
 543#ifdef CONFIG_CHARGER_PCF50633
 544        INIT_DELAYED_WORK(&gta02_charger_work, gta02_charger_worker);
 545#endif
 546
 547        s3c24xx_udc_set_platdata(&gta02_udc_cfg);
 548        s3c24xx_ts_set_platdata(&gta02_ts_info);
 549        s3c_ohci_set_platdata(&gta02_usb_info);
 550        s3c_nand_set_platdata(&gta02_nand_info);
 551        s3c_i2c0_set_platdata(NULL);
 552
 553        i2c_register_board_info(0, gta02_i2c_devs, ARRAY_SIZE(gta02_i2c_devs));
 554
 555        /* Configure the I2S pins (GPE0...GPE4) in correct mode */
 556        s3c_gpio_cfgall_range(S3C2410_GPE(0), 5, S3C_GPIO_SFN(2),
 557                              S3C_GPIO_PULL_NONE);
 558
 559        gpiod_add_lookup_table(&gta02_audio_gpio_table);
 560        gpiod_add_lookup_table(&gta02_mmc_gpio_table);
 561        platform_add_devices(gta02_devices, ARRAY_SIZE(gta02_devices));
 562        pm_power_off = gta02_poweroff;
 563
 564        regulator_has_full_constraints();
 565}
 566
 567static void __init gta02_init_time(void)
 568{
 569        s3c2442_init_clocks(12000000);
 570        s3c24xx_timer_init();
 571}
 572
 573MACHINE_START(NEO1973_GTA02, "GTA02")
 574        /* Maintainer: Nelson Castillo <arhuaco@freaks-unidos.net> */
 575        .atag_offset    = 0x100,
 576        .map_io         = gta02_map_io,
 577        .init_irq       = s3c2442_init_irq,
 578        .init_machine   = gta02_machine_init,
 579        .init_time      = gta02_init_time,
 580MACHINE_END
 581