arch/arm/mach-pxa/mainstone.c

   1 /*
   2  *  linux/arch/arm/mach-pxa/mainstone.c
   3  *
   4  *  Support for the Intel HCDDBBVA0 Development Platform.
   5  *  (go figure how they came up with such name...)
   6  *
   7  *  Author:     Nicolas Pitre
   8  *  Created:    Nov 05, 2002
   9  *  Copyright:  MontaVista Software Inc.
  10  *
  11  *  This program is free software; you can redistribute it and/or modify
  12  *  it under the terms of the GNU General Public License version 2 as
  13  *  published by the Free Software Foundation.
  14  */
  15 #include <linux/gpio.h>
  16 #include <linux/gpio/machine.h>
  17 #include <linux/init.h>
  18 #include <linux/platform_device.h>
  19 #include <linux/syscore_ops.h>
  20 #include <linux/interrupt.h>
  21 #include <linux/sched.h>
  22 #include <linux/bitops.h>
  23 #include <linux/fb.h>
  24 #include <linux/ioport.h>
  25 #include <linux/mtd/mtd.h>
  26 #include <linux/mtd/partitions.h>
  27 #include <linux/input.h>
  28 #include <linux/gpio_keys.h>
  29 #include <linux/pwm.h>
  30 #include <linux/pwm_backlight.h>
  31 #include <linux/smc91x.h>
  32 #include <linux/i2c/pxa-i2c.h>
  33 #include <linux/slab.h>
  34 #include <linux/leds.h>
  35
  36 #include <asm/types.h>
  37 #include <asm/setup.h>
  38 #include <asm/memory.h>
  39 #include <asm/mach-types.h>
  40 #include <mach/hardware.h>
  41 #include <asm/irq.h>
  42 #include <asm/sizes.h>
  43
  44 #include <asm/mach/arch.h>
  45 #include <asm/mach/map.h>
  46 #include <asm/mach/irq.h>
  47 #include <asm/mach/flash.h>
  48
  49 #include <mach/pxa27x.h>
  50 #include <mach/mainstone.h>
  51 #include <mach/audio.h>
  52 #include <linux/platform_data/video-pxafb.h>
  53 #include <linux/platform_data/mmc-pxamci.h>
  54 #include <linux/platform_data/irda-pxaficp.h>
  55 #include <linux/platform_data/usb-ohci-pxa27x.h>
  56 #include <linux/platform_data/keypad-pxa27x.h>
  57 #include <mach/smemc.h>
  58
  59 #include "generic.h"
  60 #include "devices.h"
  61
  62 static unsigned long mainstone_pin_config[] = {
  63         /* Chip Select */
  64         GPIO15_nCS_1,
  65
  66         /* LCD - 16bpp Active TFT */
  67         GPIOxx_LCD_TFT_16BPP,
  68         GPIO16_PWM0_OUT,        /* Backlight */
  69
  70         /* MMC */
  71         GPIO32_MMC_CLK,
  72         GPIO112_MMC_CMD,
  73         GPIO92_MMC_DAT_0,
  74         GPIO109_MMC_DAT_1,
  75         GPIO110_MMC_DAT_2,
  76         GPIO111_MMC_DAT_3,
  77
  78         /* USB Host Port 1 */
  79         GPIO88_USBH1_PWR,
  80         GPIO89_USBH1_PEN,
  81
  82         /* PC Card */
  83         GPIO48_nPOE,
  84         GPIO49_nPWE,
  85         GPIO50_nPIOR,
  86         GPIO51_nPIOW,
  87         GPIO85_nPCE_1,
  88         GPIO54_nPCE_2,
  89         GPIO79_PSKTSEL,
  90         GPIO55_nPREG,
  91         GPIO56_nPWAIT,
  92         GPIO57_nIOIS16,
  93
  94         /* AC97 */
  95         GPIO28_AC97_BITCLK,
  96         GPIO29_AC97_SDATA_IN_0,
  97         GPIO30_AC97_SDATA_OUT,
  98         GPIO31_AC97_SYNC,
  99         GPIO45_AC97_SYSCLK,
 100
 101         /* Keypad */
 102         GPIO93_KP_DKIN_0,
 103         GPIO94_KP_DKIN_1,
 104         GPIO95_KP_DKIN_2,
 105         GPIO100_KP_MKIN_0       | WAKEUP_ON_LEVEL_HIGH,
 106         GPIO101_KP_MKIN_1       | WAKEUP_ON_LEVEL_HIGH,
 107         GPIO102_KP_MKIN_2       | WAKEUP_ON_LEVEL_HIGH,
 108         GPIO97_KP_MKIN_3        | WAKEUP_ON_LEVEL_HIGH,
 109         GPIO98_KP_MKIN_4        | WAKEUP_ON_LEVEL_HIGH,
 110         GPIO99_KP_MKIN_5        | WAKEUP_ON_LEVEL_HIGH,
 111         GPIO103_KP_MKOUT_0,
 112         GPIO104_KP_MKOUT_1,
 113         GPIO105_KP_MKOUT_2,
 114         GPIO106_KP_MKOUT_3,
 115         GPIO107_KP_MKOUT_4,
 116         GPIO108_KP_MKOUT_5,
 117         GPIO96_KP_MKOUT_6,
 118
 119         /* I2C */
 120         GPIO117_I2C_SCL,
 121         GPIO118_I2C_SDA,
 122
 123         /* GPIO */
 124         GPIO1_GPIO | WAKEUP_ON_EDGE_BOTH,
 125 };
 126
 127 static struct resource smc91x_resources[] = {
 128         [0] = {
 129                 .start  = (MST_ETH_PHYS + 0x300),
 130                 .end    = (MST_ETH_PHYS + 0xfffff),
 131                 .flags  = IORESOURCE_MEM,
 132         },
 133         [1] = {
 134                 .start  = MAINSTONE_IRQ(3),
 135                 .end    = MAINSTONE_IRQ(3),
 136                 .flags  = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
 137         }
 138 };
 139
 140 static struct smc91x_platdata mainstone_smc91x_info = {
 141         .flags  = SMC91X_USE_8BIT | SMC91X_USE_16BIT | SMC91X_USE_32BIT |
 142                   SMC91X_NOWAIT | SMC91X_USE_DMA,
 143 };
 144
 145 static struct platform_device smc91x_device = {
 146         .name           = "smc91x",
 147         .id             = 0,
 148         .num_resources  = ARRAY_SIZE(smc91x_resources),
 149         .resource       = smc91x_resources,
 150         .dev            = {
 151                 .platform_data = &mainstone_smc91x_info,
 152         },
 153 };
 154
 155 static int mst_audio_startup(struct snd_pcm_substream *substream, void *priv)
 156 {
 157         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 158                 MST_MSCWR2 &= ~MST_MSCWR2_AC97_SPKROFF;
 159         return 0;
 160 }
 161
 162 static void mst_audio_shutdown(struct snd_pcm_substream *substream, void *priv)
 163 {
 164         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 165                 MST_MSCWR2 |= MST_MSCWR2_AC97_SPKROFF;
 166 }
 167
 168 static long mst_audio_suspend_mask;
 169
 170 static void mst_audio_suspend(void *priv)
 171 {
 172         mst_audio_suspend_mask = MST_MSCWR2;
 173         MST_MSCWR2 |= MST_MSCWR2_AC97_SPKROFF;
 174 }
 175
 176 static void mst_audio_resume(void *priv)
 177 {
 178         MST_MSCWR2 &= mst_audio_suspend_mask | ~MST_MSCWR2_AC97_SPKROFF;
 179 }
 180
 181 static pxa2xx_audio_ops_t mst_audio_ops = {
 182         .startup        = mst_audio_startup,
 183         .shutdown       = mst_audio_shutdown,
 184         .suspend        = mst_audio_suspend,
 185         .resume         = mst_audio_resume,
 186 };
 187
 188 static struct resource flash_resources[] = {
 189         [0] = {
 190                 .start  = PXA_CS0_PHYS,
 191                 .end    = PXA_CS0_PHYS + SZ_64M - 1,
 192                 .flags  = IORESOURCE_MEM,
 193         },
 194         [1] = {
 195                 .start  = PXA_CS1_PHYS,
 196                 .end    = PXA_CS1_PHYS + SZ_64M - 1,
 197                 .flags  = IORESOURCE_MEM,
 198         },
 199 };
 200
 201 static struct mtd_partition mainstoneflash0_partitions[] = {
 202         {
 203                 .name =         "Bootloader",
 204                 .size =         0x00040000,
 205                 .offset =       0,
 206                 .mask_flags =   MTD_WRITEABLE  /* force read-only */
 207         },{
 208                 .name =         "Kernel",
 209                 .size =         0x00400000,
 210                 .offset =       0x00040000,
 211         },{
 212                 .name =         "Filesystem",
 213                 .size =         MTDPART_SIZ_FULL,
 214                 .offset =       0x00440000
 215         }
 216 };
 217
 218 static struct flash_platform_data mst_flash_data[2] = {
 219         {
 220                 .map_name       = "cfi_probe",
 221                 .parts          = mainstoneflash0_partitions,
 222                 .nr_parts       = ARRAY_SIZE(mainstoneflash0_partitions),
 223         }, {
 224                 .map_name       = "cfi_probe",
 225                 .parts          = NULL,
 226                 .nr_parts       = 0,
 227         }
 228 };
 229
 230 static struct platform_device mst_flash_device[2] = {
 231         {
 232                 .name           = "pxa2xx-flash",
 233                 .id             = 0,
 234                 .dev = {
 235                         .platform_data = &mst_flash_data[0],
 236                 },
 237                 .resource = &flash_resources[0],
 238                 .num_resources = 1,
 239         },
 240         {
 241                 .name           = "pxa2xx-flash",
 242                 .id             = 1,
 243                 .dev = {
 244                         .platform_data = &mst_flash_data[1],
 245                 },
 246                 .resource = &flash_resources[1],
 247                 .num_resources = 1,
 248         },
 249 };
 250
 251 #if defined(CONFIG_FB_PXA) || defined(CONFIG_FB_PXA_MODULE)
 252 static struct pwm_lookup mainstone_pwm_lookup[] = {
 253         PWM_LOOKUP("pxa27x-pwm.0", 0, "pwm-backlight.0", NULL, 78770,
 254                    PWM_POLARITY_NORMAL),
 255 };
 256
 257 static struct platform_pwm_backlight_data mainstone_backlight_data = {
 258         .max_brightness = 1023,
 259         .dft_brightness = 1023,
 260         .enable_gpio    = -1,
 261 };
 262
 263 static struct platform_device mainstone_backlight_device = {
 264         .name           = "pwm-backlight",
 265         .dev            = {
 266                 .parent = &pxa27x_device_pwm0.dev,
 267                 .platform_data = &mainstone_backlight_data,
 268         },
 269 };
 270
 271 static void __init mainstone_backlight_register(void)
 272 {
 273         int ret;
 274
 275         pwm_add_table(mainstone_pwm_lookup, ARRAY_SIZE(mainstone_pwm_lookup));
 276
 277         ret = platform_device_register(&mainstone_backlight_device);
 278         if (ret) {
 279                 printk(KERN_ERR "mainstone: failed to register backlight device: %d\n", ret);
 280                 pwm_remove_table(mainstone_pwm_lookup,
 281                                  ARRAY_SIZE(mainstone_pwm_lookup));
 282         }
 283 }
 284 #else
 285 #define mainstone_backlight_register()  do { } while (0)
 286 #endif
 287
 288 static struct pxafb_mode_info toshiba_ltm04c380k_mode = {
 289         .pixclock               = 50000,
 290         .xres                   = 640,
 291         .yres                   = 480,
 292         .bpp                    = 16,
 293         .hsync_len              = 1,
 294         .left_margin            = 0x9f,
 295         .right_margin           = 1,
 296         .vsync_len              = 44,
 297         .upper_margin           = 0,
 298         .lower_margin           = 0,
 299         .sync                   = FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT,
 300 };
 301
 302 static struct pxafb_mode_info toshiba_ltm035a776c_mode = {
 303         .pixclock               = 110000,
 304         .xres                   = 240,
 305         .yres                   = 320,
 306         .bpp                    = 16,
 307         .hsync_len              = 4,
 308         .left_margin            = 8,
 309         .right_margin           = 20,
 310         .vsync_len              = 3,
 311         .upper_margin           = 1,
 312         .lower_margin           = 10,
 313         .sync                   = FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT,
 314 };
 315
 316 static struct pxafb_mach_info mainstone_pxafb_info = {
 317         .num_modes              = 1,
 318         .lcd_conn               = LCD_COLOR_TFT_16BPP | LCD_PCLK_EDGE_FALL,
 319 };
 320
 321 static int mainstone_mci_init(struct device *dev, irq_handler_t mstone_detect_int, void *data)
 322 {
 323         int err;
 324
 325         /* make sure SD/Memory Stick multiplexer's signals
 326          * are routed to MMC controller
 327          */
 328         MST_MSCWR1 &= ~MST_MSCWR1_MS_SEL;
 329
 330         err = request_irq(MAINSTONE_MMC_IRQ, mstone_detect_int, 0,
 331                              "MMC card detect", data);
 332         if (err)
 333                 printk(KERN_ERR "mainstone_mci_init: MMC/SD: can't request MMC card detect IRQ\n");
 334
 335         return err;
 336 }
 337
 338 static int mainstone_mci_setpower(struct device *dev, unsigned int vdd)
 339 {
 340         struct pxamci_platform_data* p_d = dev->platform_data;
 341
 342         if (( 1 << vdd) & p_d->ocr_mask) {
 343                 printk(KERN_DEBUG "%s: on\n", __func__);
 344                 MST_MSCWR1 |= MST_MSCWR1_MMC_ON;
 345                 MST_MSCWR1 &= ~MST_MSCWR1_MS_SEL;
 346         } else {
 347                 printk(KERN_DEBUG "%s: off\n", __func__);
 348                 MST_MSCWR1 &= ~MST_MSCWR1_MMC_ON;
 349         }
 350         return 0;
 351 }
 352
 353 static void mainstone_mci_exit(struct device *dev, void *data)
 354 {
 355         free_irq(MAINSTONE_MMC_IRQ, data);
 356 }
 357
 358 static struct pxamci_platform_data mainstone_mci_platform_data = {
 359         .ocr_mask               = MMC_VDD_32_33|MMC_VDD_33_34,
 360         .init                   = mainstone_mci_init,
 361         .setpower               = mainstone_mci_setpower,
 362         .exit                   = mainstone_mci_exit,
 363         .gpio_card_detect       = -1,
 364         .gpio_card_ro           = -1,
 365         .gpio_power             = -1,
 366 };
 367
 368 static void mainstone_irda_transceiver_mode(struct device *dev, int mode)
 369 {
 370         unsigned long flags;
 371
 372         local_irq_save(flags);
 373         if (mode & IR_SIRMODE) {
 374                 MST_MSCWR1 &= ~MST_MSCWR1_IRDA_FIR;
 375         } else if (mode & IR_FIRMODE) {
 376                 MST_MSCWR1 |= MST_MSCWR1_IRDA_FIR;
 377         }
 378         pxa2xx_transceiver_mode(dev, mode);
 379         if (mode & IR_OFF) {
 380                 MST_MSCWR1 = (MST_MSCWR1 & ~MST_MSCWR1_IRDA_MASK) | MST_MSCWR1_IRDA_OFF;
 381         } else {
 382                 MST_MSCWR1 = (MST_MSCWR1 & ~MST_MSCWR1_IRDA_MASK) | MST_MSCWR1_IRDA_FULL;
 383         }
 384         local_irq_restore(flags);
 385 }
 386
 387 static struct pxaficp_platform_data mainstone_ficp_platform_data = {
 388         .gpio_pwdown            = -1,
 389         .transceiver_cap        = IR_SIRMODE | IR_FIRMODE | IR_OFF,
 390         .transceiver_mode       = mainstone_irda_transceiver_mode,
 391 };
 392
 393 static struct gpio_keys_button gpio_keys_button[] = {
 394         [0] = {
 395                 .desc   = "wakeup",
 396                 .code   = KEY_SUSPEND,
 397                 .type   = EV_KEY,
 398                 .gpio   = 1,
 399                 .wakeup = 1,
 400         },
 401 };
 402
 403 static struct gpio_keys_platform_data mainstone_gpio_keys = {
 404         .buttons        = gpio_keys_button,
 405         .nbuttons       = 1,
 406 };
 407
 408 static struct platform_device mst_gpio_keys_device = {
 409         .name           = "gpio-keys",
 410         .id             = -1,
 411         .dev            = {
 412                 .platform_data  = &mainstone_gpio_keys,
 413         },
 414 };
 415
 416 static struct resource mst_cplds_resources[] = {
 417         [0] = {
 418                 .start  = MST_FPGA_PHYS + 0xc0,
 419                 .end    = MST_FPGA_PHYS + 0xe0 - 1,
 420                 .flags  = IORESOURCE_MEM,
 421         },
 422         [1] = {
 423                 .start  = PXA_GPIO_TO_IRQ(0),
 424                 .end    = PXA_GPIO_TO_IRQ(0),
 425                 .flags  = IORESOURCE_IRQ | IORESOURCE_IRQ_LOWEDGE,
 426         },
 427         [2] = {
 428                 .start  = MAINSTONE_IRQ(0),
 429                 .end    = MAINSTONE_IRQ(15),
 430                 .flags  = IORESOURCE_IRQ,
 431         },
 432 };
 433
 434 static struct platform_device mst_cplds_device = {
 435         .name           = "pxa_cplds_irqs",
 436         .id             = -1,
 437         .resource       = &mst_cplds_resources[0],
 438         .num_resources  = 3,
 439 };
 440
 441 static struct platform_device *platform_devices[] __initdata = {
 442         &smc91x_device,
 443         &mst_flash_device[0],
 444         &mst_flash_device[1],
 445         &mst_gpio_keys_device,
 446         &mst_cplds_device,
 447 };
 448
 449 static struct pxaohci_platform_data mainstone_ohci_platform_data = {
 450         .port_mode      = PMM_PERPORT_MODE,
 451         .flags          = ENABLE_PORT_ALL | POWER_CONTROL_LOW | POWER_SENSE_LOW,
 452 };
 453
 454 #if defined(CONFIG_KEYBOARD_PXA27x) || defined(CONFIG_KEYBOARD_PXA27x_MODULE)
 455 static const unsigned int mainstone_matrix_keys[] = {
 456         KEY(0, 0, KEY_A), KEY(1, 0, KEY_B), KEY(2, 0, KEY_C),
 457         KEY(3, 0, KEY_D), KEY(4, 0, KEY_E), KEY(5, 0, KEY_F),
 458         KEY(0, 1, KEY_G), KEY(1, 1, KEY_H), KEY(2, 1, KEY_I),
 459         KEY(3, 1, KEY_J), KEY(4, 1, KEY_K), KEY(5, 1, KEY_L),
 460         KEY(0, 2, KEY_M), KEY(1, 2, KEY_N), KEY(2, 2, KEY_O),
 461         KEY(3, 2, KEY_P), KEY(4, 2, KEY_Q), KEY(5, 2, KEY_R),
 462         KEY(0, 3, KEY_S), KEY(1, 3, KEY_T), KEY(2, 3, KEY_U),
 463         KEY(3, 3, KEY_V), KEY(4, 3, KEY_W), KEY(5, 3, KEY_X),
 464         KEY(2, 4, KEY_Y), KEY(3, 4, KEY_Z),
 465
 466         KEY(0, 4, KEY_DOT),     /* . */
 467         KEY(1, 4, KEY_CLOSE),   /* @ */
 468         KEY(4, 4, KEY_SLASH),
 469         KEY(5, 4, KEY_BACKSLASH),
 470         KEY(0, 5, KEY_HOME),
 471         KEY(1, 5, KEY_LEFTSHIFT),
 472         KEY(2, 5, KEY_SPACE),
 473         KEY(3, 5, KEY_SPACE),
 474         KEY(4, 5, KEY_ENTER),
 475         KEY(5, 5, KEY_BACKSPACE),
 476
 477         KEY(0, 6, KEY_UP),
 478         KEY(1, 6, KEY_DOWN),
 479         KEY(2, 6, KEY_LEFT),
 480         KEY(3, 6, KEY_RIGHT),
 481         KEY(4, 6, KEY_SELECT),
 482 };
 483
 484 static struct matrix_keymap_data mainstone_matrix_keymap_data = {
 485         .keymap                 = mainstone_matrix_keys,
 486         .keymap_size            = ARRAY_SIZE(mainstone_matrix_keys),
 487 };
 488
 489 struct pxa27x_keypad_platform_data mainstone_keypad_info = {
 490         .matrix_key_rows        = 6,
 491         .matrix_key_cols        = 7,
 492         .matrix_keymap_data     = &mainstone_matrix_keymap_data,
 493
 494         .enable_rotary0         = 1,
 495         .rotary0_up_key         = KEY_UP,
 496         .rotary0_down_key       = KEY_DOWN,
 497
 498         .debounce_interval      = 30,
 499 };
 500
 501 static void __init mainstone_init_keypad(void)
 502 {
 503         pxa_set_keypad_info(&mainstone_keypad_info);
 504 }
 505 #else
 506 static inline void mainstone_init_keypad(void) {}
 507 #endif
 508
 509 static void __init mainstone_init(void)
 510 {
 511         int SW7 = 0;  /* FIXME: get from SCR (Mst doc section 3.2.1.1) */
 512
 513         pxa2xx_mfp_config(ARRAY_AND_SIZE(mainstone_pin_config));
 514
 515         pxa_set_ffuart_info(NULL);
 516         pxa_set_btuart_info(NULL);
 517         pxa_set_stuart_info(NULL);
 518
 519         mst_flash_data[0].width = (__raw_readl(BOOT_DEF) & 1) ? 2 : 4;
 520         mst_flash_data[1].width = 4;
 521
 522         /* Compensate for SW7 which swaps the flash banks */
 523         mst_flash_data[SW7].name = "processor-flash";
 524         mst_flash_data[SW7 ^ 1].name = "mainboard-flash";
 525
 526         printk(KERN_NOTICE "Mainstone configured to boot from %s\n",
 527                mst_flash_data[0].name);
 528
 529         /* system bus arbiter setting
 530          * - Core_Park
 531          * - LCD_wt:DMA_wt:CORE_Wt = 2:3:4
 532          */
 533         ARB_CNTRL = ARB_CORE_PARK | 0x234;
 534
 535         platform_add_devices(platform_devices, ARRAY_SIZE(platform_devices));
 536
 537         /* reading Mainstone's "Virtual Configuration Register"
 538            might be handy to select LCD type here */
 539         if (0)
 540                 mainstone_pxafb_info.modes = &toshiba_ltm04c380k_mode;
 541         else
 542                 mainstone_pxafb_info.modes = &toshiba_ltm035a776c_mode;
 543
 544         pxa_set_fb_info(NULL, &mainstone_pxafb_info);
 545         mainstone_backlight_register();
 546
 547         pxa_set_mci_info(&mainstone_mci_platform_data);
 548         pxa_set_ficp_info(&mainstone_ficp_platform_data);
 549         pxa_set_ohci_info(&mainstone_ohci_platform_data);
 550         pxa_set_i2c_info(NULL);
 551         pxa_set_ac97_info(&mst_audio_ops);
 552
 553         mainstone_init_keypad();
 554 }
 555
 556
 557 static struct map_desc mainstone_io_desc[] __initdata = {
 558         {       /* CPLD */
 559                 .virtual        =  MST_FPGA_VIRT,
 560                 .pfn            = __phys_to_pfn(MST_FPGA_PHYS),
 561                 .length         = 0x00100000,
 562                 .type           = MT_DEVICE
 563         }
 564 };
 565
 566 static void __init mainstone_map_io(void)
 567 {
 568         pxa27x_map_io();
 569         iotable_init(mainstone_io_desc, ARRAY_SIZE(mainstone_io_desc));
 570
 571         /*      for use I SRAM as framebuffer.  */
 572         PSLR |= 0xF04;
 573         PCFR = 0x66;
 574 }
 575
 576 /*
 577  * Driver for the 8 discrete LEDs available for general use:
 578  * Note: bits [15-8] are used to enable/blank the 8 7 segment hex displays
 579  * so be sure to not monkey with them here.
 580  */
 581
 582 #if defined(CONFIG_NEW_LEDS) && defined(CONFIG_LEDS_CLASS)
 583 struct mainstone_led {
 584         struct led_classdev     cdev;
 585         u8                      mask;
 586 };
 587
 588 /*
 589  * The triggers lines up below will only be used if the
 590  * LED triggers are compiled in.
 591  */
 592 static const struct {
 593         const char *name;
 594         const char *trigger;
 595 } mainstone_leds[] = {
 596         { "mainstone:D28", "default-on", },
 597         { "mainstone:D27", "cpu0", },
 598         { "mainstone:D26", "heartbeat" },
 599         { "mainstone:D25", },
 600         { "mainstone:D24", },
 601         { "mainstone:D23", },
 602         { "mainstone:D22", },
 603         { "mainstone:D21", },
 604 };
 605
 606 static void mainstone_led_set(struct led_classdev *cdev,
 607                               enum led_brightness b)
 608 {
 609         struct mainstone_led *led = container_of(cdev,
 610                                          struct mainstone_led, cdev);
 611         u32 reg = MST_LEDCTRL;
 612
 613         if (b != LED_OFF)
 614                 reg |= led->mask;
 615         else
 616                 reg &= ~led->mask;
 617
 618         MST_LEDCTRL = reg;
 619 }
 620
 621 static enum led_brightness mainstone_led_get(struct led_classdev *cdev)
 622 {
 623         struct mainstone_led *led = container_of(cdev,
 624                                          struct mainstone_led, cdev);
 625         u32 reg = MST_LEDCTRL;
 626
 627         return (reg & led->mask) ? LED_FULL : LED_OFF;
 628 }
 629
 630 static int __init mainstone_leds_init(void)
 631 {
 632         int i;
 633
 634         if (!machine_is_mainstone())
 635                 return -ENODEV;
 636
 637         /* All ON */
 638         MST_LEDCTRL |= 0xff;
 639         for (i = 0; i < ARRAY_SIZE(mainstone_leds); i++) {
 640                 struct mainstone_led *led;
 641
 642                 led = kzalloc(sizeof(*led), GFP_KERNEL);
 643                 if (!led)
 644                         break;
 645
 646                 led->cdev.name = mainstone_leds[i].name;
 647                 led->cdev.brightness_set = mainstone_led_set;
 648                 led->cdev.brightness_get = mainstone_led_get;
 649                 led->cdev.default_trigger = mainstone_leds[i].trigger;
 650                 led->mask = BIT(i);
 651
 652                 if (led_classdev_register(NULL, &led->cdev) < 0) {
 653                         kfree(led);
 654                         break;
 655                 }
 656         }
 657
 658         return 0;
 659 }
 660
 661 /*
 662  * Since we may have triggers on any subsystem, defer registration
 663  * until after subsystem_init.
 664  */
 665 fs_initcall(mainstone_leds_init);
 666 #endif
 667
 668 MACHINE_START(MAINSTONE, "Intel HCDDBBVA0 Development Platform (aka Mainstone)")
 669         /* Maintainer: MontaVista Software Inc. */
 670         .atag_offset    = 0x100,        /* BLOB boot parameter setting */
 671         .map_io         = mainstone_map_io,
 672         .nr_irqs        = MAINSTONE_NR_IRQS,
 673         .init_irq       = pxa27x_init_irq,
 674         .handle_irq     = pxa27x_handle_irq,
 675         .init_time      = pxa_timer_init,
 676         .init_machine   = mainstone_init,
 677         .restart        = pxa_restart,
 678 MACHINE_END