recipes/linux/linux-omap-pm-2.6.29/omap3-touchbook/board-omap3touchbook.c

   1 /*
   2  * linux/arch/arm/mach-omap2/board-omap3touchbook.c
   3  *
   4  * Copyright (C) 2009 Always Innovating
   5  *
   6  * Modified from mach-omap2/board-omap3beagleboard.c
   7  *
   8  * Initial code: Grégoire Gentil, Tim Yamin
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation.
  13  */
  14
  15 #include <linux/kernel.h>
  16 #include <linux/init.h>
  17 #include <linux/platform_device.h>
  18 #include <linux/delay.h>
  19 #include <linux/err.h>
  20 #include <linux/clk.h>
  21 #include <linux/io.h>
  22 #include <linux/leds.h>
  23 #include <linux/gpio.h>
  24 #include <linux/input.h>
  25 #include <linux/gpio_keys.h>
  26
  27 #include <linux/mtd/mtd.h>
  28 #include <linux/mtd/partitions.h>
  29 #include <linux/mtd/nand.h>
  30
  31 #include <mach/mcspi.h>
  32 #include <linux/spi/spi.h>
  33 #include <linux/spi/ads7846.h>
  34 #include <linux/mma7455l.h>
  35
  36 #include <mach/dmtimer.h>
  37 #include <linux/backlight.h>
  38
  39 #include <linux/regulator/machine.h>
  40 #include <linux/i2c/twl4030.h>
  41 #include <linux/omapfb.h>
  42
  43 #include <mach/hardware.h>
  44 #include <asm/mach-types.h>
  45 #include <asm/mach/arch.h>
  46 #include <asm/mach/map.h>
  47 #include <asm/mach/flash.h>
  48
  49 #include <mach/board.h>
  50 #include <mach/usb.h>
  51 #include <mach/common.h>
  52 #include <mach/gpmc.h>
  53 #include <mach/nand.h>
  54 #include <mach/mux.h>
  55 #include <mach/omap-pm.h>
  56 #include <mach/clock.h>
  57 #include <mach/display.h>
  58
  59
  60 #include "twl4030-generic-scripts.h"
  61 #include "mmc-twl4030.h"
  62 #include "pm.h"
  63 #include "omap3-opp.h"
  64
  65
  66 #define GPMC_CS0_BASE  0x60
  67 #define GPMC_CS_SIZE   0x30
  68
  69 #define NAND_BLOCK_SIZE         SZ_128K
  70
  71 #define OMAP3_AC_GPIO           136 //Int1 DRDY
  72 #define OMAP3_TS_GPIO           162
  73 #define OMAP3_CHACHA_GPIO       154
  74 #define TB_BL_PWM_TIMER         9
  75 #define TB_KILL_POWER_GPIO      168
  76
  77 unsigned int ai_revision = 2;
  78
  79 static struct mtd_partition omap3touchbook_nand_partitions[] = {
  80         /* All the partition sizes are listed in terms of NAND block size */
  81         {
  82                 .name           = "X-Loader",
  83                 .offset         = 0,
  84                 .size           = 4 * NAND_BLOCK_SIZE,
  85                 .mask_flags     = MTD_WRITEABLE,        /* force read-only */
  86         },
  87         {
  88                 .name           = "U-Boot",
  89                 .offset         = MTDPART_OFS_APPEND,   /* Offset = 0x80000 */
  90                 .size           = 15 * NAND_BLOCK_SIZE,
  91                 .mask_flags     = MTD_WRITEABLE,        /* force read-only */
  92         },
  93         {
  94                 .name           = "U-Boot Env",
  95                 .offset         = MTDPART_OFS_APPEND,   /* Offset = 0x260000 */
  96                 .size           = 1 * NAND_BLOCK_SIZE,
  97         },
  98         {
  99                 .name           = "Kernel",
 100                 .offset         = MTDPART_OFS_APPEND,   /* Offset = 0x280000 */
 101                 .size           = 32 * NAND_BLOCK_SIZE,
 102         },
 103         {
 104                 .name           = "File System",
 105                 .offset         = MTDPART_OFS_APPEND,   /* Offset = 0x680000 */
 106                 .size           = MTDPART_SIZ_FULL,
 107         },
 108 };
 109
 110 static struct omap_nand_platform_data omap3touchbook_nand_data = {
 111         .options        = NAND_BUSWIDTH_16,
 112         .parts          = omap3touchbook_nand_partitions,
 113         .nr_parts       = ARRAY_SIZE(omap3touchbook_nand_partitions),
 114         .dma_channel    = -1,           /* disable DMA in OMAP NAND driver */
 115         .nand_setup     = NULL,
 116         .dev_ready      = NULL,
 117 };
 118
 119 static struct resource omap3touchbook_nand_resource = {
 120         .flags          = IORESOURCE_MEM,
 121 };
 122
 123 static struct platform_device omap3touchbook_nand_device = {
 124         .name           = "omap2-nand",
 125         .id             = -1,
 126         .dev            = {
 127                 .platform_data  = &omap3touchbook_nand_data,
 128         },
 129         .num_resources  = 1,
 130         .resource       = &omap3touchbook_nand_resource,
 131 };
 132
 133 #include "sdram-micron-mt46h32m32lf-6.h"
 134
 135 static struct omap_uart_config omap3_touchbook_uart_config __initdata = {
 136         .enabled_uarts  = ((1 << 0) | (1 << 1) | (1 << 2)),
 137 };
 138
 139 static struct twl4030_usb_data touchbook_usb_data = {
 140         .usb_mode       = T2_USB_MODE_ULPI,
 141 };
 142
 143 static struct twl4030_hsmmc_info mmc[] = {
 144         {
 145                 .mmc            = 1,
 146                 .wires          = 8,
 147                 .gpio_wp        = 29,
 148         },
 149         {}      /* Terminator */
 150 };
 151
 152 static struct regulator_consumer_supply touchbook_vmmc1_supply = {
 153         .supply                 = "vmmc",
 154 };
 155
 156 static struct regulator_consumer_supply touchbook_vsim_supply = {
 157         .supply                 = "vmmc_aux",
 158 };
 159
 160 static struct gpio_led gpio_leds[];
 161
 162 static int touchbook_twl_gpio_setup(struct device *dev,
 163                 unsigned gpio, unsigned ngpio)
 164 {
 165         /* gpio + 0 is "mmc0_cd" (input/IRQ) */
 166         omap_cfg_reg(AH8_34XX_GPIO29);
 167         mmc[0].gpio_cd = gpio + 0;
 168         twl4030_mmc_init(mmc);
 169
 170         /* link regulators to MMC adapters */
 171         touchbook_vmmc1_supply.dev = mmc[0].dev;
 172         touchbook_vsim_supply.dev = mmc[0].dev;
 173
 174         /* REVISIT: need ehci-omap hooks for external VBUS
 175          * power switch and overcurrent detect
 176          */
 177
 178 #if 0 /* TODO: This needs to be modified to not rely on u-boot */
 179         gpio_request(gpio + 1, "EHCI_nOC");
 180         gpio_direction_input(gpio + 1);
 181
 182         /* TWL4030_GPIO_MAX + 0 == ledA, EHCI nEN_USB_PWR (out, active low) */
 183         gpio_request(gpio + TWL4030_GPIO_MAX, "nEN_USB_PWR");
 184         gpio_direction_output(gpio + TWL4030_GPIO_MAX, 1);
 185
 186         /* TWL4030_GPIO_MAX + 1 == ledB, PMU_STAT (out, active low LED) */
 187         gpio_leds[2].gpio = gpio + TWL4030_GPIO_MAX + 1;
 188 #endif
 189         return 0;
 190 }
 191
 192 static struct twl4030_gpio_platform_data touchbook_gpio_data = {
 193         .gpio_base      = OMAP_MAX_GPIO_LINES,
 194         .irq_base       = TWL4030_GPIO_IRQ_BASE,
 195         .irq_end        = TWL4030_GPIO_IRQ_END,
 196         .use_leds       = true,
 197         .pullups        = BIT(1),
 198         .pulldowns      = BIT(2) | BIT(6) | BIT(7) | BIT(8) | BIT(13)
 199                                 | BIT(15) | BIT(16) | BIT(17),
 200         .setup          = touchbook_twl_gpio_setup,
 201 };
 202
 203 static struct platform_device omap3_touchbook_lcd_device = {
 204         .name           = "omap3touchbook_lcd",
 205         .id             = -1,
 206 };
 207
 208 static struct regulator_consumer_supply touchbook_vdac_supply = {
 209         .supply         = "vdac",
 210         .dev            = &omap3_touchbook_lcd_device.dev,
 211 };
 212
 213 static struct regulator_consumer_supply touchbook_vdvi_supply = {
 214         .supply         = "vdvi",
 215         .dev            = &omap3_touchbook_lcd_device.dev,
 216 };
 217
 218 /* VMMC1 for MMC1 pins CMD, CLK, DAT0..DAT3 (20 mA, plus card == max 220 mA) */
 219 static struct regulator_init_data touchbook_vmmc1 = {
 220         .constraints = {
 221                 .min_uV                 = 1850000,
 222                 .max_uV                 = 3150000,
 223                 .valid_modes_mask       = REGULATOR_MODE_NORMAL
 224                                         | REGULATOR_MODE_STANDBY,
 225                 .valid_ops_mask         = REGULATOR_CHANGE_VOLTAGE
 226                                         | REGULATOR_CHANGE_MODE
 227                                         | REGULATOR_CHANGE_STATUS,
 228         },
 229         .num_consumer_supplies  = 1,
 230         .consumer_supplies      = &touchbook_vmmc1_supply,
 231 };
 232
 233 /* VSIM for MMC1 pins DAT4..DAT7 (2 mA, plus card == max 50 mA) */
 234 static struct regulator_init_data touchbook_vsim = {
 235         .constraints = {
 236                 .min_uV                 = 1800000,
 237                 .max_uV                 = 3000000,
 238                 .valid_modes_mask       = REGULATOR_MODE_NORMAL
 239                                         | REGULATOR_MODE_STANDBY,
 240                 .valid_ops_mask         = REGULATOR_CHANGE_VOLTAGE
 241                                         | REGULATOR_CHANGE_MODE
 242                                         | REGULATOR_CHANGE_STATUS,
 243         },
 244         .num_consumer_supplies  = 1,
 245         .consumer_supplies      = &touchbook_vsim_supply,
 246 };
 247
 248 /* VDAC for DSS driving S-Video (8 mA unloaded, max 65 mA) */
 249 static struct regulator_init_data touchbook_vdac = {
 250         .constraints = {
 251                 .min_uV                 = 1800000,
 252                 .max_uV                 = 1800000,
 253                 .valid_modes_mask       = REGULATOR_MODE_NORMAL
 254                                         | REGULATOR_MODE_STANDBY,
 255                 .valid_ops_mask         = REGULATOR_CHANGE_MODE
 256                                         | REGULATOR_CHANGE_STATUS,
 257         },
 258         .num_consumer_supplies  = 1,
 259         .consumer_supplies      = &touchbook_vdac_supply,
 260 };
 261
 262 /* VPLL2 for digital video outputs */
 263 static struct regulator_init_data touchbook_vpll2 = {
 264         .constraints = {
 265                 .name                   = "VDVI",
 266                 .min_uV                 = 1800000,
 267                 .max_uV                 = 1800000,
 268                 .valid_modes_mask       = REGULATOR_MODE_NORMAL
 269                                         | REGULATOR_MODE_STANDBY,
 270                 .valid_ops_mask         = REGULATOR_CHANGE_MODE
 271                                         | REGULATOR_CHANGE_STATUS,
 272         },
 273         .num_consumer_supplies  = 1,
 274         .consumer_supplies      = &touchbook_vdvi_supply,
 275 };
 276
 277 static const struct twl4030_resconfig touchbook_resconfig[] = {
 278         /* disable regulators that u-boot left enabled; the
 279          * devices' drivers should be managing these.
 280          */
 281         { .resource = RES_VAUX3, },     /* not even connected! */
 282         { .resource = RES_VMMC1, },
 283         { .resource = RES_VSIM, },
 284         { .resource = RES_VPLL2, },
 285         { .resource = RES_VDAC, },
 286         { .resource = RES_VUSB_1V5, },
 287         { .resource = RES_VUSB_1V8, },
 288         { .resource = RES_VUSB_3V1, },
 289         { 0, },
 290 };
 291
 292 static struct twl4030_power_data touchbook_power_data = {
 293         .resource_config        = touchbook_resconfig,
 294         /* REVISIT can't use GENERIC3430_T2SCRIPTS_DATA;
 295          * among other things, it makes reboot fail.
 296          */
 297 };
 298
 299 static struct twl4030_bci_platform_data touchbook_bci_data = {
 300         .tblsize                = 0,
 301         .no_backup_battery      = 1,
 302 };
 303
 304 static struct twl4030_madc_platform_data touchbook_madc_data = {
 305         .irq_line       = 1,
 306 };
 307
 308 static struct twl4030_platform_data touchbook_twldata = {
 309         .irq_base       = TWL4030_IRQ_BASE,
 310         .irq_end        = TWL4030_IRQ_END,
 311
 312         /* platform_data for children goes here */
 313         .usb            = &touchbook_usb_data,
 314         .gpio           = &touchbook_gpio_data,
 315         .power          = &touchbook_power_data,
 316         .vmmc1          = &touchbook_vmmc1,
 317         .vsim           = &touchbook_vsim,
 318         .vdac           = &touchbook_vdac,
 319         .vpll2          = &touchbook_vpll2,
 320
 321         /* TouchBook BCI */
 322         .bci            = &touchbook_bci_data,
 323         .madc           = &touchbook_madc_data,
 324 };
 325
 326 static struct i2c_board_info __initdata touchbook_i2c_boardinfo[] = {
 327         {
 328                 I2C_BOARD_INFO("twl4030", 0x48),
 329                 .flags = I2C_CLIENT_WAKE,
 330                 .irq = INT_34XX_SYS_NIRQ,
 331                 .platform_data = &touchbook_twldata,
 332         },
 333 };
 334
 335 static struct i2c_board_info __initdata touchBook_i2c_boardinfo[] = {
 336         {
 337                 I2C_BOARD_INFO("bq27200", 0x55),
 338         },
 339 //      {
 340 //              I2C_BOARD_INFO("chacha_mt8c", 0x40),
 341 //              .irq = OMAP_GPIO_IRQ(OMAP3_CHACHA_GPIO),
 342 //      },
 343 };
 344
 345 static void __init omap3_touchbook_i2c_init(void)
 346 {
 347         int ret;
 348
 349         /* Standard TouchBook bus */
 350         omap_register_i2c_bus(1, 2600, touchbook_i2c_boardinfo,
 351                         ARRAY_SIZE(touchbook_i2c_boardinfo));
 352
 353         /* Additional TouchBook bus */
 354         omap_register_i2c_bus(3, 100, touchBook_i2c_boardinfo,
 355                         ARRAY_SIZE(touchBook_i2c_boardinfo));
 356
 357 /*      ret = gpio_request(OMAP3_CHACHA_GPIO, "chacha_mt8c");
 358         if (ret < 0) {
 359                 printk(KERN_ERR "Failed to request GPIO %d for chacha_mt8c IRQ\n", OMAP3_CHACHA_GPIO);
 360                 return;
 361         }
 362
 363         gpio_direction_input(OMAP3_CHACHA_GPIO);*/
 364         return;
 365 }
 366
 367 static void __init omap3_ads7846_init(void)
 368 {
 369         if (gpio_request(OMAP3_TS_GPIO, "ads7846_pen_down")) {
 370                 printk(KERN_ERR "Failed to request GPIO %d for "
 371                                 "ads7846 pen down IRQ\n", OMAP3_TS_GPIO);
 372                 return;
 373         }
 374
 375         gpio_direction_input(OMAP3_TS_GPIO);
 376         omap_set_gpio_debounce(OMAP3_TS_GPIO, 1);
 377         omap_set_gpio_debounce_time(OMAP3_TS_GPIO, 0xa);
 378 }
 379
 380 static struct ads7846_platform_data ads7846_config = {
 381         .x_min                  = 100,
 382         .y_min                  = 265,
 383         .x_max                  = 3950,
 384         .y_max                  = 3750,
 385         .x_plate_ohms           = 40,
 386         .pressure_max           = 255,
 387         .debounce_max           = 10,
 388         .debounce_tol           = 5,
 389         .debounce_rep           = 1,
 390         .gpio_pendown           = OMAP3_TS_GPIO,
 391         .keep_vref_on           = 1,
 392 };
 393
 394 static struct omap2_mcspi_device_config ads7846_mcspi_config = {
 395         .turbo_mode     = 0,
 396         .single_channel = 1,    /* 0: slave, 1: master */
 397 };
 398
 399 static struct spi_board_info omap3_ads7846_spi_board_info[] __initdata = {
 400         {
 401                 .modalias               = "ads7846",
 402                 .bus_num                = 4,
 403                 .chip_select            = 0,
 404                 .max_speed_hz           = 1500000,
 405                 .controller_data        = &ads7846_mcspi_config, //(void *) 161,
 406                 .irq                    = OMAP_GPIO_IRQ(OMAP3_TS_GPIO),
 407                 .platform_data          = &ads7846_config,
 408         }
 409 };
 410
 411 static void __init omap3_touchbook_init_irq(void)
 412 {
 413         omap2_init_common_hw(mt46h32m32lf6_sdrc_params, omap3_mpu_rate_table,
 414                                                  omap3_dsp_rate_table, omap3_l3_rate_table);
 415         omap_init_irq();
 416         omap_gpio_init();
 417 }
 418
 419 static struct gpio_led gpio_leds[] = {
 420         {
 421                 .name                   = "touchbook::usr0",
 422                 .default_trigger        = "heartbeat",
 423                 .gpio                   = 150,
 424         },
 425         {
 426                 .name                   = "touchbook::usr1",
 427                 .default_trigger        = "mmc0",
 428                 .gpio                   = 149,
 429         },
 430         {
 431                 .name                   = "touchbook::pmu_stat",
 432                 .gpio                   = -EINVAL,      /* gets replaced */
 433                 .active_low             = true,
 434         },
 435 };
 436
 437 static struct gpio_led_platform_data gpio_led_info = {
 438         .leds           = gpio_leds,
 439         .num_leds       = ARRAY_SIZE(gpio_leds),
 440 };
 441
 442 static struct platform_device leds_gpio = {
 443         .name   = "leds-gpio",
 444         .id     = -1,
 445         .dev    = {
 446                 .platform_data  = &gpio_led_info,
 447         },
 448 };
 449
 450 static struct gpio_keys_button gpio_buttons[] = {
 451         {
 452                 .code                   = BTN_EXTRA,
 453                 .gpio                   = 7,
 454                 .desc                   = "user",
 455                 .wakeup                 = 1,
 456         },
 457         {
 458                 .code                   = KEY_POWER,
 459                 .gpio                   = 183,
 460                 .desc                   = "power",
 461                 .wakeup                 = 1,
 462                 .active_low             = 1,
 463         },
 464 };
 465
 466 static struct gpio_keys_platform_data gpio_key_info = {
 467         .buttons        = gpio_buttons,
 468         .nbuttons       = ARRAY_SIZE(gpio_buttons),
 469 };
 470
 471 static struct platform_device keys_gpio = {
 472         .name   = "gpio-keys",
 473         .id     = -1,
 474         .dev    = {
 475                 .platform_data  = &gpio_key_info,
 476         },
 477 };
 478
 479 /* DSS */
 480
 481 static int touchbook_enable_dvi(struct omap_display *display)
 482 {
 483         if (display->hw_config.panel_reset_gpio != -1)
 484                 gpio_set_value(display->hw_config.panel_reset_gpio, 1);
 485
 486         return 0;
 487 }
 488
 489 static void touchbook_disable_dvi(struct omap_display *display)
 490 {
 491         if (display->hw_config.panel_reset_gpio != -1)
 492                 gpio_set_value(display->hw_config.panel_reset_gpio, 0);
 493 }
 494
 495 static struct omap_dss_display_config touchbook_display_data_dvi = {
 496         .type = OMAP_DISPLAY_TYPE_DPI,
 497         .name = "dvi",
 498         .panel_name = "panel-generic",
 499         .u.dpi.data_lines = 24,
 500         .panel_reset_gpio = 176,
 501         .panel_enable = touchbook_enable_dvi,
 502         .panel_disable = touchbook_disable_dvi,
 503 };
 504
 505
 506 static int touchbook_panel_enable_tv(struct omap_display *display)
 507 {
 508 #define ENABLE_VDAC_DEDICATED           0x03
 509 #define ENABLE_VDAC_DEV_GRP             0x20
 510
 511         twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
 512                         ENABLE_VDAC_DEDICATED,
 513                         TWL4030_VDAC_DEDICATED);
 514         twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
 515                         ENABLE_VDAC_DEV_GRP, TWL4030_VDAC_DEV_GRP);
 516
 517         return 0;
 518 }
 519
 520 static void touchbook_panel_disable_tv(struct omap_display *display)
 521 {
 522         twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0x00,
 523                         TWL4030_VDAC_DEDICATED);
 524         twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0x00,
 525                         TWL4030_VDAC_DEV_GRP);
 526 }
 527
 528 static struct omap_dss_display_config touchbook_display_data_tv = {
 529         .type = OMAP_DISPLAY_TYPE_VENC,
 530         .name = "tv",
 531         .u.venc.type = OMAP_DSS_VENC_TYPE_SVIDEO,
 532         .panel_enable = touchbook_panel_enable_tv,
 533         .panel_disable = touchbook_panel_disable_tv,
 534 };
 535
 536 static struct omap_dss_board_info touchbook_dss_data = {
 537         .num_displays = 2,
 538         .displays = {
 539                 &touchbook_display_data_dvi,
 540                 &touchbook_display_data_tv,
 541         }
 542 };
 543
 544 static struct platform_device touchbook_dss_device = {
 545         .name          = "omapdss",
 546         .id            = -1,
 547         .dev            = {
 548                 .platform_data = &touchbook_dss_data,
 549         },
 550 };
 551
 552 static void __init touchbook_display_init(void)
 553 {
 554         int r;
 555
 556         r = gpio_request(touchbook_display_data_dvi.panel_reset_gpio, "DVI reset");
 557         if (r < 0) {
 558                 printk(KERN_ERR "Unable to get DVI reset GPIO\n");
 559                 return;
 560         }
 561
 562         gpio_direction_output(touchbook_display_data_dvi.panel_reset_gpio, 0);
 563 }
 564
 565 static struct omap_board_config_kernel omap3_touchbook_config[] __initdata = {
 566         { OMAP_TAG_UART,        &omap3_touchbook_uart_config },
 567 };
 568
 569 static struct platform_device *omap3_touchbook_devices[] __initdata = {
 570         &touchbook_dss_device,
 571         &leds_gpio,
 572         &keys_gpio,
 573 };
 574
 575 static void __init omap3touchbook_flash_init(void)
 576 {
 577         u8 cs = 0;
 578         u8 nandcs = GPMC_CS_NUM + 1;
 579
 580         u32 gpmc_base_add = OMAP34XX_GPMC_VIRT;
 581
 582         /* find out the chip-select on which NAND exists */
 583         while (cs < GPMC_CS_NUM) {
 584                 u32 ret = 0;
 585                 ret = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG1);
 586
 587                 if ((ret & 0xC00) == 0x800) {
 588                         printk(KERN_INFO "Found NAND on CS%d\n", cs);
 589                         if (nandcs > GPMC_CS_NUM)
 590                                 nandcs = cs;
 591                 }
 592                 cs++;
 593         }
 594
 595         if (nandcs > GPMC_CS_NUM) {
 596                 printk(KERN_INFO "NAND: Unable to find configuration "
 597                                  "in GPMC\n ");
 598                 return;
 599         }
 600
 601         if (nandcs < GPMC_CS_NUM) {
 602                 omap3touchbook_nand_data.cs = nandcs;
 603                 omap3touchbook_nand_data.gpmc_cs_baseaddr = (void *)
 604                         (gpmc_base_add + GPMC_CS0_BASE + nandcs * GPMC_CS_SIZE);
 605                 omap3touchbook_nand_data.gpmc_baseaddr = (void *) (gpmc_base_add);
 606
 607                 printk(KERN_INFO "Registering NAND on CS%d\n", nandcs);
 608                 if (platform_device_register(&omap3touchbook_nand_device) < 0)
 609                         printk(KERN_ERR "Unable to register NAND device\n");
 610         }
 611 }
 612
 613 static void __init omap3_mma7455l_init(void)
 614 {
 615         int ret;
 616
 617         ret = gpio_request(OMAP3_AC_GPIO, "mma7455l");
 618         if (ret < 0) {
 619                 printk(KERN_ERR "Failed to request GPIO %d for mma7455l IRQ\n", OMAP3_AC_GPIO);
 620                 return;
 621         }
 622
 623         gpio_direction_input(OMAP3_AC_GPIO);
 624 }
 625
 626 static struct mma7455l_platform_data mma7455l_config = {
 627         .calibration_x = -4, //26 for Beagleboard
 628         .calibration_y = 28, //44 for Beagleboard
 629         .calibration_z = -28, //26 for Beagleboard
 630 };
 631
 632 static struct omap2_mcspi_device_config mma7455l_mcspi_config = {
 633         .turbo_mode     = 0,
 634         .single_channel = 1,    /* 0: slave, 1: master */
 635 };
 636
 637 static struct spi_board_info omap3_mma7455l_spi_board_info[] __initdata = {
 638         {
 639                 .modalias               = "mma7455l",
 640                 .bus_num                = 3,
 641                 .chip_select            = 0,
 642                 .max_speed_hz           = 200000,
 643                 .irq                    = OMAP_GPIO_IRQ(OMAP3_AC_GPIO),
 644                 .controller_data        = &mma7455l_mcspi_config, //(void *) 135,
 645                 .platform_data          = &mma7455l_config,
 646         }
 647 };
 648
 649 static int touchbook_backlight_brightness = 50;
 650 static struct omap_dm_timer *touchbook_backlight_pwm;
 651
 652 static int touchbook_backlight_read(struct backlight_device *bd)
 653 {
 654         return touchbook_backlight_brightness;
 655 }
 656
 657 static int touchbook_backlight_update(struct backlight_device *bd)
 658 {
 659         int value = bd->props.brightness;
 660         touchbook_backlight_brightness = value;
 661
 662         /* Frequency calculation:
 663            - For 200Hz PWM, you want to load -164 (=> -32768Hz / 200Hz).
 664            - Minimum duty cycle for the backlight is 15%.
 665            - You have (164*0.85) => ~140 levels of brightness.
 666         */
 667
 668         /* Halve input brightness */
 669         value /= 2;
 670
 671         /* For maximum brightness, just stop the timer... */
 672         if(value != bd->props.max_brightness)
 673         {
 674                 /* Load the appropriate value for 200Hz PWM */
 675                 u32 period = clk_get_rate(omap_dm_timer_get_fclk(touchbook_backlight_pwm)) / 200;
 676
 677                 /* Minimum duty cycle is 15% */
 678                 u32 minimum = (period * 3) / 20;
 679                 u32 maximum = (period * 17) / 20;
 680
 681                 /* Work out match value */
 682                 u32 match = (maximum * value) / 100;
 683
 684                 /* Start... */
 685                 omap_dm_timer_set_load(touchbook_backlight_pwm, 1, 0xFFFFFFFF - period - 1);
 686                 omap_dm_timer_set_match(touchbook_backlight_pwm, 1, 0xFFFFFFFF - minimum - match);
 687                 omap_dm_timer_write_counter(touchbook_backlight_pwm, -1);
 688                 //omap_dm_timer_stop(touchbook_backlight_pwm);
 689                 omap_dm_timer_start(touchbook_backlight_pwm);
 690         }
 691         else
 692                 omap_dm_timer_stop(touchbook_backlight_pwm);
 693
 694
 695         return 0;
 696 }
 697
 698 static struct backlight_ops touchbook_backlight_properties = {
 699         .get_brightness = touchbook_backlight_read,
 700         .update_status = touchbook_backlight_update,
 701 };
 702
 703 static void __init omap3_touchbook_backlight_init(void)
 704 {
 705         static struct backlight_device *bd;
 706         bd = backlight_device_register("touchbook", NULL, NULL, &touchbook_backlight_properties);
 707
 708         if(bd)
 709         {
 710                 touchbook_backlight_pwm = omap_dm_timer_request_specific(TB_BL_PWM_TIMER);
 711                 omap_dm_timer_enable(touchbook_backlight_pwm);
 712                 omap_dm_timer_set_source(touchbook_backlight_pwm, OMAP_TIMER_SRC_SYS_CLK);
 713                 omap_dm_timer_set_pwm(touchbook_backlight_pwm, 1, 1, OMAP_TIMER_TRIGGER_OVERFLOW_AND_COMPARE);
 714
 715                 bd->props.max_brightness = 100;
 716                 bd->props.brightness = touchbook_backlight_brightness;
 717         }
 718
 719         touchbook_backlight_update(bd);
 720 }
 721
 722 static void omap3_touchbook_poweroff(void)
 723 {
 724         int r;
 725
 726         r = gpio_request(TB_KILL_POWER_GPIO, "DVI reset");
 727         if (r < 0) {
 728                 printk(KERN_ERR "Unable to get kill power GPIO\n");
 729                 return;
 730         }
 731
 732         gpio_direction_output(TB_KILL_POWER_GPIO, 0);
 733 }
 734
 735 static int __init ai_revision_instance(char *str)
 736 {
 737         if (!str)
 738                 return -EINVAL;
 739
 740         ai_revision = simple_strtoul(str, NULL, 10);
 741
 742         return 0;
 743 }
 744
 745 static void __init omap3_touchbook_init(void)
 746 {
 747         pm_power_off = omap3_touchbook_poweroff;
 748
 749         omap3_touchbook_i2c_init();
 750         platform_add_devices(omap3_touchbook_devices,
 751                         ARRAY_SIZE(omap3_touchbook_devices));
 752         omap_board_config = omap3_touchbook_config;
 753         omap_board_config_size = ARRAY_SIZE(omap3_touchbook_config);
 754         omap_serial_init();
 755
 756         omap_cfg_reg(J25_34XX_GPIO170);
 757
 758         omap3touchbook_flash_init();
 759         touchbook_display_init();
 760         omap3_touchbook_backlight_init();
 761
 762         /* Touch Book */
 763         spi_register_board_info(omap3_ads7846_spi_board_info, ARRAY_SIZE(omap3_ads7846_spi_board_info));
 764         spi_register_board_info(omap3_mma7455l_spi_board_info, ARRAY_SIZE(omap3_mma7455l_spi_board_info));
 765
 766         omap3_ads7846_init();
 767         omap3_mma7455l_init();
 768
 769         usb_musb_init();
 770         usb_ehci_init();
 771 }
 772
 773 static void __init omap3_touchbook_map_io(void)
 774 {
 775         omap2_set_globals_343x();
 776         omap2_map_common_io();
 777 }
 778
 779 early_param("air", ai_revision_instance);
 780
 781 MACHINE_START(OMAP3_TOUCHBOOK, "OMAP3 Touch Book")
 782         /* Maintainer: Gregoire Gentil - http://www.alwaysinnovating.com */
 783         .phys_io        = 0x48000000,
 784         .io_pg_offst    = ((0xd8000000) >> 18) & 0xfffc,
 785         .boot_params    = 0x80000100,
 786         .map_io         = omap3_touchbook_map_io,
 787         .init_irq       = omap3_touchbook_init_irq,
 788         .init_machine   = omap3_touchbook_init,
 789         .timer          = &omap_timer,
 790 MACHINE_END