linux/arch/arm/mach-s3c24xx/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.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
  75static struct pcf50633 *gta02_pcf;
  76
  77/*
  78 * This gets called frequently when we paniced.
  79 */
  80
  81static 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
  93static 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
 106static 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
 143static void
 144gta02_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
 165static struct delayed_work gta02_charger_work;
 166static int gta02_usb_vbus_draw;
 167
 168static 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
 192static 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
 207static 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/*
 223 * This is called when pc50633 is probed, unfortunately quite late in the
 224 * day since it is an I2C bus device. Here we can belatedly define some
 225 * platform devices with the advantage that we can mark the pcf50633 as the
 226 * parent. This makes them get suspended and resumed with their parent
 227 * the pcf50633 still around.
 228 */
 229
 230static void gta02_pmu_attach_child_devices(struct pcf50633 *pcf);
 231
 232
 233static char *gta02_batteries[] = {
 234        "battery",
 235};
 236
 237static struct pcf50633_bl_platform_data gta02_backlight_data = {
 238        .default_brightness = 0x3f,
 239        .default_brightness_limit = 0,
 240        .ramp_time = 5,
 241};
 242
 243static struct pcf50633_platform_data gta02_pcf_pdata = {
 244        .resumers = {
 245                [0] =   PCF50633_INT1_USBINS |
 246                        PCF50633_INT1_USBREM |
 247                        PCF50633_INT1_ALARM,
 248                [1] =   PCF50633_INT2_ONKEYF,
 249                [2] =   PCF50633_INT3_ONKEY1S,
 250                [3] =   PCF50633_INT4_LOWSYS |
 251                        PCF50633_INT4_LOWBAT |
 252                        PCF50633_INT4_HIGHTMP,
 253        },
 254
 255        .batteries = gta02_batteries,
 256        .num_batteries = ARRAY_SIZE(gta02_batteries),
 257
 258        .charger_reference_current_ma = 1000,
 259
 260        .backlight_data = &gta02_backlight_data,
 261
 262        .reg_init_data = {
 263                [PCF50633_REGULATOR_AUTO] = {
 264                        .constraints = {
 265                                .min_uV = 3300000,
 266                                .max_uV = 3300000,
 267                                .valid_modes_mask = REGULATOR_MODE_NORMAL,
 268                                .always_on = 1,
 269                                .apply_uV = 1,
 270                        },
 271                },
 272                [PCF50633_REGULATOR_DOWN1] = {
 273                        .constraints = {
 274                                .min_uV = 1300000,
 275                                .max_uV = 1600000,
 276                                .valid_modes_mask = REGULATOR_MODE_NORMAL,
 277                                .always_on = 1,
 278                                .apply_uV = 1,
 279                        },
 280                },
 281                [PCF50633_REGULATOR_DOWN2] = {
 282                        .constraints = {
 283                                .min_uV = 1800000,
 284                                .max_uV = 1800000,
 285                                .valid_modes_mask = REGULATOR_MODE_NORMAL,
 286                                .apply_uV = 1,
 287                                .always_on = 1,
 288                        },
 289                },
 290                [PCF50633_REGULATOR_HCLDO] = {
 291                        .constraints = {
 292                                .min_uV = 2000000,
 293                                .max_uV = 3300000,
 294                                .valid_modes_mask = REGULATOR_MODE_NORMAL,
 295                                .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
 296                                                REGULATOR_CHANGE_STATUS,
 297                        },
 298                },
 299                [PCF50633_REGULATOR_LDO1] = {
 300                        .constraints = {
 301                                .min_uV = 3300000,
 302                                .max_uV = 3300000,
 303                                .valid_modes_mask = REGULATOR_MODE_NORMAL,
 304                                .valid_ops_mask = REGULATOR_CHANGE_STATUS,
 305                                .apply_uV = 1,
 306                        },
 307                },
 308                [PCF50633_REGULATOR_LDO2] = {
 309                        .constraints = {
 310                                .min_uV = 3300000,
 311                                .max_uV = 3300000,
 312                                .valid_modes_mask = REGULATOR_MODE_NORMAL,
 313                                .apply_uV = 1,
 314                        },
 315                },
 316                [PCF50633_REGULATOR_LDO3] = {
 317                        .constraints = {
 318                                .min_uV = 3000000,
 319                                .max_uV = 3000000,
 320                                .valid_modes_mask = REGULATOR_MODE_NORMAL,
 321                                .apply_uV = 1,
 322                        },
 323                },
 324                [PCF50633_REGULATOR_LDO4] = {
 325                        .constraints = {
 326                                .min_uV = 3200000,
 327                                .max_uV = 3200000,
 328                                .valid_modes_mask = REGULATOR_MODE_NORMAL,
 329                                .valid_ops_mask = REGULATOR_CHANGE_STATUS,
 330                                .apply_uV = 1,
 331                        },
 332                },
 333                [PCF50633_REGULATOR_LDO5] = {
 334                        .constraints = {
 335                                .min_uV = 3000000,
 336                                .max_uV = 3000000,
 337                                .valid_modes_mask = REGULATOR_MODE_NORMAL,
 338                                .valid_ops_mask = REGULATOR_CHANGE_STATUS,
 339                                .apply_uV = 1,
 340                        },
 341                },
 342                [PCF50633_REGULATOR_LDO6] = {
 343                        .constraints = {
 344                                .min_uV = 3000000,
 345                                .max_uV = 3000000,
 346                                .valid_modes_mask = REGULATOR_MODE_NORMAL,
 347                        },
 348                },
 349                [PCF50633_REGULATOR_MEMLDO] = {
 350                        .constraints = {
 351                                .min_uV = 1800000,
 352                                .max_uV = 1800000,
 353                                .valid_modes_mask = REGULATOR_MODE_NORMAL,
 354                        },
 355                },
 356
 357        },
 358        .probe_done = gta02_pmu_attach_child_devices,
 359        .mbc_event_callback = gta02_pmu_event_callback,
 360};
 361
 362
 363/* NOR Flash. */
 364
 365#define GTA02_FLASH_BASE        0x18000000 /* GCS3 */
 366#define GTA02_FLASH_SIZE        0x200000 /* 2MBytes */
 367
 368static struct physmap_flash_data gta02_nor_flash_data = {
 369        .width          = 2,
 370};
 371
 372static struct resource gta02_nor_flash_resource =
 373        DEFINE_RES_MEM(GTA02_FLASH_BASE, GTA02_FLASH_SIZE);
 374
 375static struct platform_device gta02_nor_flash = {
 376        .name           = "physmap-flash",
 377        .id             = 0,
 378        .dev            = {
 379                .platform_data  = &gta02_nor_flash_data,
 380        },
 381        .resource       = &gta02_nor_flash_resource,
 382        .num_resources  = 1,
 383};
 384
 385
 386static struct platform_device s3c24xx_pwm_device = {
 387        .name           = "s3c24xx_pwm",
 388        .num_resources  = 0,
 389};
 390
 391static struct platform_device gta02_dfbmcs320_device = {
 392        .name = "dfbmcs320",
 393};
 394
 395static struct i2c_board_info gta02_i2c_devs[] __initdata = {
 396        {
 397                I2C_BOARD_INFO("pcf50633", 0x73),
 398                .irq = GTA02_IRQ_PCF50633,
 399                .platform_data = &gta02_pcf_pdata,
 400        },
 401        {
 402                I2C_BOARD_INFO("wm8753", 0x1a),
 403        },
 404};
 405
 406static struct s3c2410_nand_set __initdata gta02_nand_sets[] = {
 407        [0] = {
 408                /*
 409                 * This name is also hard-coded in the boot loaders, so
 410                 * changing it would would require all users to upgrade
 411                 * their boot loaders, some of which are stored in a NOR
 412                 * that is considered to be immutable.
 413                 */
 414                .name           = "neo1973-nand",
 415                .nr_chips       = 1,
 416                .flash_bbt      = 1,
 417        },
 418};
 419
 420/*
 421 * Choose a set of timings derived from S3C@2442B MCP54
 422 * data sheet (K5D2G13ACM-D075 MCP Memory).
 423 */
 424
 425static struct s3c2410_platform_nand __initdata gta02_nand_info = {
 426        .tacls          = 0,
 427        .twrph0         = 25,
 428        .twrph1         = 15,
 429        .nr_sets        = ARRAY_SIZE(gta02_nand_sets),
 430        .sets           = gta02_nand_sets,
 431        .ecc_mode       = NAND_ECC_SOFT,
 432};
 433
 434
 435/* Get PMU to set USB current limit accordingly. */
 436static struct s3c2410_udc_mach_info gta02_udc_cfg __initdata = {
 437        .vbus_draw      = gta02_udc_vbus_draw,
 438        .pullup_pin = GTA02_GPIO_USB_PULLUP,
 439};
 440
 441/* USB */
 442static struct s3c2410_hcd_info gta02_usb_info __initdata = {
 443        .port[0]        = {
 444                .flags  = S3C_HCDFLG_USED,
 445        },
 446        .port[1]        = {
 447                .flags  = 0,
 448        },
 449};
 450
 451/* Touchscreen */
 452static struct s3c2410_ts_mach_info gta02_ts_info = {
 453        .delay                  = 10000,
 454        .presc                  = 0xff, /* slow as we can go */
 455        .oversampling_shift     = 2,
 456};
 457
 458/* Buttons */
 459static struct gpio_keys_button gta02_buttons[] = {
 460        {
 461                .gpio = GTA02_GPIO_AUX_KEY,
 462                .code = KEY_PHONE,
 463                .desc = "Aux",
 464                .type = EV_KEY,
 465                .debounce_interval = 100,
 466        },
 467        {
 468                .gpio = GTA02_GPIO_HOLD_KEY,
 469                .code = KEY_PAUSE,
 470                .desc = "Hold",
 471                .type = EV_KEY,
 472                .debounce_interval = 100,
 473        },
 474};
 475
 476static struct gpio_keys_platform_data gta02_buttons_pdata = {
 477        .buttons = gta02_buttons,
 478        .nbuttons = ARRAY_SIZE(gta02_buttons),
 479};
 480
 481static struct platform_device gta02_buttons_device = {
 482        .name = "gpio-keys",
 483        .id = -1,
 484        .dev = {
 485                .platform_data = &gta02_buttons_pdata,
 486        },
 487};
 488
 489static void __init gta02_map_io(void)
 490{
 491        s3c24xx_init_io(gta02_iodesc, ARRAY_SIZE(gta02_iodesc));
 492        s3c24xx_init_uarts(gta02_uartcfgs, ARRAY_SIZE(gta02_uartcfgs));
 493        samsung_set_timer_source(SAMSUNG_PWM3, SAMSUNG_PWM4);
 494}
 495
 496
 497/* These are the guys that don't need to be children of PMU. */
 498
 499static struct platform_device *gta02_devices[] __initdata = {
 500        &s3c_device_ohci,
 501        &s3c_device_wdt,
 502        &s3c_device_sdi,
 503        &s3c_device_usbgadget,
 504        &s3c_device_nand,
 505        &gta02_nor_flash,
 506        &s3c24xx_pwm_device,
 507        &s3c_device_iis,
 508        &s3c_device_i2c0,
 509        &gta02_dfbmcs320_device,
 510        &gta02_buttons_device,
 511        &s3c_device_adc,
 512        &s3c_device_ts,
 513};
 514
 515/* These guys DO need to be children of PMU. */
 516
 517static 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
 531static 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
 545static void gta02_poweroff(void)
 546{
 547        pcf50633_reg_set_bit_mask(gta02_pcf, PCF50633_REG_OOCSHDWN, 1, 1);
 548}
 549
 550static 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        s3c24xx_ts_set_platdata(&gta02_ts_info);
 563        s3c_ohci_set_platdata(&gta02_usb_info);
 564        s3c_nand_set_platdata(&gta02_nand_info);
 565        s3c_i2c0_set_platdata(NULL);
 566
 567        i2c_register_board_info(0, gta02_i2c_devs, ARRAY_SIZE(gta02_i2c_devs));
 568
 569        platform_add_devices(gta02_devices, ARRAY_SIZE(gta02_devices));
 570        pm_power_off = gta02_poweroff;
 571
 572        regulator_has_full_constraints();
 573}
 574
 575static void __init gta02_init_time(void)
 576{
 577        s3c2442_init_clocks(12000000);
 578        samsung_timer_init();
 579}
 580
 581MACHINE_START(NEO1973_GTA02, "GTA02")
 582        /* Maintainer: Nelson Castillo <arhuaco@freaks-unidos.net> */
 583        .atag_offset    = 0x100,
 584        .map_io         = gta02_map_io,
 585        .init_irq       = s3c2442_init_irq,
 586        .init_machine   = gta02_machine_init,
 587        .init_time      = gta02_init_time,
 588MACHINE_END
 589