release/src-rt-6.x.4708/linux/linux-2.6.36/arch/arm/mach-pxa/lubbock.c

   1 /*
   2  *  linux/arch/arm/mach-pxa/lubbock.c
   3  *
   4  *  Support for the Intel DBPXA250 Development Platform.
   5  *
   6  *  Author:     Nicolas Pitre
   7  *  Created:    Jun 15, 2001
   8  *  Copyright:  MontaVista Software Inc.
   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 #include <linux/module.h>
  15 #include <linux/kernel.h>
  16 #include <linux/init.h>
  17 #include <linux/platform_device.h>
  18 #include <linux/sysdev.h>
  19 #include <linux/major.h>
  20 #include <linux/fb.h>
  21 #include <linux/interrupt.h>
  22 #include <linux/mtd/mtd.h>
  23 #include <linux/mtd/partitions.h>
  24 #include <linux/smc91x.h>
  25
  26 #include <linux/spi/spi.h>
  27 #include <linux/spi/ads7846.h>
  28 #include <mach/pxa2xx_spi.h>
  29
  30 #include <asm/setup.h>
  31 #include <asm/memory.h>
  32 #include <asm/mach-types.h>
  33 #include <mach/hardware.h>
  34 #include <asm/irq.h>
  35 #include <asm/sizes.h>
  36
  37 #include <asm/mach/arch.h>
  38 #include <asm/mach/map.h>
  39 #include <asm/mach/irq.h>
  40 #include <asm/mach/flash.h>
  41
  42 #include <asm/hardware/sa1111.h>
  43
  44 #include <mach/pxa25x.h>
  45 #include <mach/gpio.h>
  46 #include <mach/audio.h>
  47 #include <mach/lubbock.h>
  48 #include <mach/udc.h>
  49 #include <mach/irda.h>
  50 #include <mach/pxafb.h>
  51 #include <mach/mmc.h>
  52 #include <mach/pm.h>
  53
  54 #include "generic.h"
  55 #include "clock.h"
  56 #include "devices.h"
  57
  58 static unsigned long lubbock_pin_config[] __initdata = {
  59         GPIO15_nCS_1,   /* CS1 - Flash */
  60         GPIO78_nCS_2,   /* CS2 - Baseboard FGPA */
  61         GPIO79_nCS_3,   /* CS3 - SMC ethernet */
  62         GPIO80_nCS_4,   /* CS4 - SA1111 */
  63
  64         /* SSP data pins */
  65         GPIO23_SSP1_SCLK,
  66         GPIO25_SSP1_TXD,
  67         GPIO26_SSP1_RXD,
  68
  69         /* AC97 */
  70         GPIO28_AC97_BITCLK,
  71         GPIO29_AC97_SDATA_IN_0,
  72         GPIO30_AC97_SDATA_OUT,
  73         GPIO31_AC97_SYNC,
  74
  75         /* LCD - 16bpp DSTN */
  76         GPIOxx_LCD_DSTN_16BPP,
  77
  78         /* BTUART */
  79         GPIO42_BTUART_RXD,
  80         GPIO43_BTUART_TXD,
  81         GPIO44_BTUART_CTS,
  82         GPIO45_BTUART_RTS,
  83
  84         /* PC Card */
  85         GPIO48_nPOE,
  86         GPIO49_nPWE,
  87         GPIO50_nPIOR,
  88         GPIO51_nPIOW,
  89         GPIO52_nPCE_1,
  90         GPIO53_nPCE_2,
  91         GPIO54_nPSKTSEL,
  92         GPIO55_nPREG,
  93         GPIO56_nPWAIT,
  94         GPIO57_nIOIS16,
  95
  96         /* MMC */
  97         GPIO6_MMC_CLK,
  98         GPIO8_MMC_CS0,
  99
 100         /* wakeup */
 101         GPIO1_GPIO | WAKEUP_ON_EDGE_RISE,
 102 };
 103
 104 #define LUB_HEXLED              __LUB_REG(LUBBOCK_FPGA_PHYS + 0x010)
 105 #define LUB_MISC_WR             __LUB_REG(LUBBOCK_FPGA_PHYS + 0x080)
 106
 107 void lubbock_set_hexled(uint32_t value)
 108 {
 109         LUB_HEXLED = value;
 110 }
 111
 112 void lubbock_set_misc_wr(unsigned int mask, unsigned int set)
 113 {
 114         unsigned long flags;
 115
 116         local_irq_save(flags);
 117         LUB_MISC_WR = (LUB_MISC_WR & ~mask) | (set & mask);
 118         local_irq_restore(flags);
 119 }
 120 EXPORT_SYMBOL(lubbock_set_misc_wr);
 121
 122 static unsigned long lubbock_irq_enabled;
 123
 124 static void lubbock_mask_irq(unsigned int irq)
 125 {
 126         int lubbock_irq = (irq - LUBBOCK_IRQ(0));
 127         LUB_IRQ_MASK_EN = (lubbock_irq_enabled &= ~(1 << lubbock_irq));
 128 }
 129
 130 static void lubbock_unmask_irq(unsigned int irq)
 131 {
 132         int lubbock_irq = (irq - LUBBOCK_IRQ(0));
 133         /* the irq can be acknowledged only if deasserted, so it's done here */
 134         LUB_IRQ_SET_CLR &= ~(1 << lubbock_irq);
 135         LUB_IRQ_MASK_EN = (lubbock_irq_enabled |= (1 << lubbock_irq));
 136 }
 137
 138 static struct irq_chip lubbock_irq_chip = {
 139         .name           = "FPGA",
 140         .ack            = lubbock_mask_irq,
 141         .mask           = lubbock_mask_irq,
 142         .unmask         = lubbock_unmask_irq,
 143 };
 144
 145 static void lubbock_irq_handler(unsigned int irq, struct irq_desc *desc)
 146 {
 147         unsigned long pending = LUB_IRQ_SET_CLR & lubbock_irq_enabled;
 148         do {
 149                 desc->chip->ack(irq);   /* clear our parent irq */
 150                 if (likely(pending)) {
 151                         irq = LUBBOCK_IRQ(0) + __ffs(pending);
 152                         generic_handle_irq(irq);
 153                 }
 154                 pending = LUB_IRQ_SET_CLR & lubbock_irq_enabled;
 155         } while (pending);
 156 }
 157
 158 static void __init lubbock_init_irq(void)
 159 {
 160         int irq;
 161
 162         pxa25x_init_irq();
 163
 164         /* setup extra lubbock irqs */
 165         for (irq = LUBBOCK_IRQ(0); irq <= LUBBOCK_LAST_IRQ; irq++) {
 166                 set_irq_chip(irq, &lubbock_irq_chip);
 167                 set_irq_handler(irq, handle_level_irq);
 168                 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
 169         }
 170
 171         set_irq_chained_handler(IRQ_GPIO(0), lubbock_irq_handler);
 172         set_irq_type(IRQ_GPIO(0), IRQ_TYPE_EDGE_FALLING);
 173 }
 174
 175 #ifdef CONFIG_PM
 176
 177 static int lubbock_irq_resume(struct sys_device *dev)
 178 {
 179         LUB_IRQ_MASK_EN = lubbock_irq_enabled;
 180         return 0;
 181 }
 182
 183 static struct sysdev_class lubbock_irq_sysclass = {
 184         .name = "cpld_irq",
 185         .resume = lubbock_irq_resume,
 186 };
 187
 188 static struct sys_device lubbock_irq_device = {
 189         .cls = &lubbock_irq_sysclass,
 190 };
 191
 192 static int __init lubbock_irq_device_init(void)
 193 {
 194         int ret = -ENODEV;
 195
 196         if (machine_is_lubbock()) {
 197                 ret = sysdev_class_register(&lubbock_irq_sysclass);
 198                 if (ret == 0)
 199                         ret = sysdev_register(&lubbock_irq_device);
 200         }
 201         return ret;
 202 }
 203
 204 device_initcall(lubbock_irq_device_init);
 205
 206 #endif
 207
 208 static int lubbock_udc_is_connected(void)
 209 {
 210         return (LUB_MISC_RD & (1 << 9)) == 0;
 211 }
 212
 213 static struct pxa2xx_udc_mach_info udc_info __initdata = {
 214         .udc_is_connected       = lubbock_udc_is_connected,
 215         // no D+ pullup; lubbock can't connect/disconnect in software
 216 };
 217
 218 static struct resource sa1111_resources[] = {
 219         [0] = {
 220                 .start  = 0x10000000,
 221                 .end    = 0x10001fff,
 222                 .flags  = IORESOURCE_MEM,
 223         },
 224         [1] = {
 225                 .start  = LUBBOCK_SA1111_IRQ,
 226                 .end    = LUBBOCK_SA1111_IRQ,
 227                 .flags  = IORESOURCE_IRQ,
 228         },
 229 };
 230
 231 static struct sa1111_platform_data sa1111_info = {
 232         .irq_base       = IRQ_BOARD_END,
 233 };
 234
 235 static struct platform_device sa1111_device = {
 236         .name           = "sa1111",
 237         .id             = -1,
 238         .num_resources  = ARRAY_SIZE(sa1111_resources),
 239         .resource       = sa1111_resources,
 240         .dev            = {
 241                 .platform_data  = &sa1111_info,
 242         },
 243 };
 244
 245 /* ADS7846 is connected through SSP ... and if your board has J5 populated,
 246  * you can select it to replace the ucb1400 by switching the touchscreen cable
 247  * (to J5) and poking board registers (as done below).  Else it's only useful
 248  * for the temperature sensors.
 249  */
 250 static struct pxa2xx_spi_master pxa_ssp_master_info = {
 251         .num_chipselect = 1,
 252 };
 253
 254 static int lubbock_ads7846_pendown_state(void)
 255 {
 256         /* TS_BUSY is bit 8 in LUB_MISC_RD, but pendown is irq-only */
 257         return 0;
 258 }
 259
 260 static struct ads7846_platform_data ads_info = {
 261         .model                  = 7846,
 262         .vref_delay_usecs       = 100,          /* internal, no cap */
 263         .get_pendown_state      = lubbock_ads7846_pendown_state,
 264         // .x_plate_ohms                = 500,  /* GUESS! */
 265         // .y_plate_ohms                = 500,  /* GUESS! */
 266 };
 267
 268 static void ads7846_cs(u32 command)
 269 {
 270         static const unsigned   TS_nCS = 1 << 11;
 271         lubbock_set_misc_wr(TS_nCS, (command == PXA2XX_CS_ASSERT) ? 0 : TS_nCS);
 272 }
 273
 274 static struct pxa2xx_spi_chip ads_hw = {
 275         .tx_threshold           = 1,
 276         .rx_threshold           = 2,
 277         .cs_control             = ads7846_cs,
 278 };
 279
 280 static struct spi_board_info spi_board_info[] __initdata = { {
 281         .modalias       = "ads7846",
 282         .platform_data  = &ads_info,
 283         .controller_data = &ads_hw,
 284         .irq            = LUBBOCK_BB_IRQ,
 285         .max_speed_hz   = 120000 /* max sample rate at 3V */
 286                                 * 26 /* command + data + overhead */,
 287         .bus_num        = 1,
 288         .chip_select    = 0,
 289 },
 290 };
 291
 292 static struct resource smc91x_resources[] = {
 293         [0] = {
 294                 .name   = "smc91x-regs",
 295                 .start  = 0x0c000c00,
 296                 .end    = 0x0c0fffff,
 297                 .flags  = IORESOURCE_MEM,
 298         },
 299         [1] = {
 300                 .start  = LUBBOCK_ETH_IRQ,
 301                 .end    = LUBBOCK_ETH_IRQ,
 302                 .flags  = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
 303         },
 304         [2] = {
 305                 .name   = "smc91x-attrib",
 306                 .start  = 0x0e000000,
 307                 .end    = 0x0e0fffff,
 308                 .flags  = IORESOURCE_MEM,
 309         },
 310 };
 311
 312 static struct smc91x_platdata lubbock_smc91x_info = {
 313         .flags  = SMC91X_USE_16BIT | SMC91X_NOWAIT | SMC91X_IO_SHIFT_2,
 314 };
 315
 316 static struct platform_device smc91x_device = {
 317         .name           = "smc91x",
 318         .id             = -1,
 319         .num_resources  = ARRAY_SIZE(smc91x_resources),
 320         .resource       = smc91x_resources,
 321         .dev            = {
 322                 .platform_data = &lubbock_smc91x_info,
 323         },
 324 };
 325
 326 static struct resource flash_resources[] = {
 327         [0] = {
 328                 .start  = 0x00000000,
 329                 .end    = SZ_64M - 1,
 330                 .flags  = IORESOURCE_MEM,
 331         },
 332         [1] = {
 333                 .start  = 0x04000000,
 334                 .end    = 0x04000000 + SZ_64M - 1,
 335                 .flags  = IORESOURCE_MEM,
 336         },
 337 };
 338
 339 static struct mtd_partition lubbock_partitions[] = {
 340         {
 341                 .name =         "Bootloader",
 342                 .size =         0x00040000,
 343                 .offset =       0,
 344                 .mask_flags =   MTD_WRITEABLE  /* force read-only */
 345         },{
 346                 .name =         "Kernel",
 347                 .size =         0x00100000,
 348                 .offset =       0x00040000,
 349         },{
 350                 .name =         "Filesystem",
 351                 .size =         MTDPART_SIZ_FULL,
 352                 .offset =       0x00140000
 353         }
 354 };
 355
 356 static struct flash_platform_data lubbock_flash_data[2] = {
 357         {
 358                 .map_name       = "cfi_probe",
 359                 .parts          = lubbock_partitions,
 360                 .nr_parts       = ARRAY_SIZE(lubbock_partitions),
 361         }, {
 362                 .map_name       = "cfi_probe",
 363                 .parts          = NULL,
 364                 .nr_parts       = 0,
 365         }
 366 };
 367
 368 static struct platform_device lubbock_flash_device[2] = {
 369         {
 370                 .name           = "pxa2xx-flash",
 371                 .id             = 0,
 372                 .dev = {
 373                         .platform_data = &lubbock_flash_data[0],
 374                 },
 375                 .resource = &flash_resources[0],
 376                 .num_resources = 1,
 377         },
 378         {
 379                 .name           = "pxa2xx-flash",
 380                 .id             = 1,
 381                 .dev = {
 382                         .platform_data = &lubbock_flash_data[1],
 383                 },
 384                 .resource = &flash_resources[1],
 385                 .num_resources = 1,
 386         },
 387 };
 388
 389 static struct platform_device *devices[] __initdata = {
 390         &sa1111_device,
 391         &smc91x_device,
 392         &lubbock_flash_device[0],
 393         &lubbock_flash_device[1],
 394 };
 395
 396 static struct pxafb_mode_info sharp_lm8v31_mode = {
 397         .pixclock       = 270000,
 398         .xres           = 640,
 399         .yres           = 480,
 400         .bpp            = 16,
 401         .hsync_len      = 1,
 402         .left_margin    = 3,
 403         .right_margin   = 3,
 404         .vsync_len      = 1,
 405         .upper_margin   = 0,
 406         .lower_margin   = 0,
 407         .sync           = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 408         .cmap_greyscale = 0,
 409 };
 410
 411 static struct pxafb_mach_info sharp_lm8v31 = {
 412         .modes          = &sharp_lm8v31_mode,
 413         .num_modes      = 1,
 414         .cmap_inverse   = 0,
 415         .cmap_static    = 0,
 416         .lcd_conn       = LCD_COLOR_DSTN_16BPP | LCD_PCLK_EDGE_FALL |
 417                           LCD_AC_BIAS_FREQ(255),
 418 };
 419
 420 #define MMC_POLL_RATE           msecs_to_jiffies(1000)
 421
 422 static void lubbock_mmc_poll(unsigned long);
 423 static irq_handler_t mmc_detect_int;
 424
 425 static struct timer_list mmc_timer = {
 426         .function       = lubbock_mmc_poll,
 427 };
 428
 429 static void lubbock_mmc_poll(unsigned long data)
 430 {
 431         unsigned long flags;
 432
 433         /* clear any previous irq state, then ... */
 434         local_irq_save(flags);
 435         LUB_IRQ_SET_CLR &= ~(1 << 0);
 436         local_irq_restore(flags);
 437
 438         /* poll until mmc/sd card is removed */
 439         if (LUB_IRQ_SET_CLR & (1 << 0))
 440                 mod_timer(&mmc_timer, jiffies + MMC_POLL_RATE);
 441         else {
 442                 (void) mmc_detect_int(LUBBOCK_SD_IRQ, (void *)data);
 443                 enable_irq(LUBBOCK_SD_IRQ);
 444         }
 445 }
 446
 447 static irqreturn_t lubbock_detect_int(int irq, void *data)
 448 {
 449         /* IRQ is level triggered; disable, and poll for removal */
 450         disable_irq(irq);
 451         mod_timer(&mmc_timer, jiffies + MMC_POLL_RATE);
 452
 453         return mmc_detect_int(irq, data);
 454 }
 455
 456 static int lubbock_mci_init(struct device *dev,
 457                 irq_handler_t detect_int,
 458                 void *data)
 459 {
 460         /* detect card insert/eject */
 461         mmc_detect_int = detect_int;
 462         init_timer(&mmc_timer);
 463         mmc_timer.data = (unsigned long) data;
 464         return request_irq(LUBBOCK_SD_IRQ, lubbock_detect_int,
 465                         IRQF_SAMPLE_RANDOM, "lubbock-sd-detect", data);
 466 }
 467
 468 static int lubbock_mci_get_ro(struct device *dev)
 469 {
 470         return (LUB_MISC_RD & (1 << 2)) != 0;
 471 }
 472
 473 static void lubbock_mci_exit(struct device *dev, void *data)
 474 {
 475         free_irq(LUBBOCK_SD_IRQ, data);
 476         del_timer_sync(&mmc_timer);
 477 }
 478
 479 static struct pxamci_platform_data lubbock_mci_platform_data = {
 480         .ocr_mask               = MMC_VDD_32_33|MMC_VDD_33_34,
 481         .detect_delay_ms        = 10,
 482         .init                   = lubbock_mci_init,
 483         .get_ro                 = lubbock_mci_get_ro,
 484         .exit                   = lubbock_mci_exit,
 485         .gpio_card_detect       = -1,
 486         .gpio_card_ro           = -1,
 487         .gpio_power             = -1,
 488 };
 489
 490 static void lubbock_irda_transceiver_mode(struct device *dev, int mode)
 491 {
 492         unsigned long flags;
 493
 494         local_irq_save(flags);
 495         if (mode & IR_SIRMODE) {
 496                 LUB_MISC_WR &= ~(1 << 4);
 497         } else if (mode & IR_FIRMODE) {
 498                 LUB_MISC_WR |= 1 << 4;
 499         }
 500         pxa2xx_transceiver_mode(dev, mode);
 501         local_irq_restore(flags);
 502 }
 503
 504 static struct pxaficp_platform_data lubbock_ficp_platform_data = {
 505         .gpio_pwdown            = -1,
 506         .transceiver_cap        = IR_SIRMODE | IR_FIRMODE,
 507         .transceiver_mode       = lubbock_irda_transceiver_mode,
 508 };
 509
 510 static void __init lubbock_init(void)
 511 {
 512         int flashboot = (LUB_CONF_SWITCHES & 1);
 513
 514         pxa2xx_mfp_config(ARRAY_AND_SIZE(lubbock_pin_config));
 515
 516         pxa_set_ffuart_info(NULL);
 517         pxa_set_btuart_info(NULL);
 518         pxa_set_stuart_info(NULL);
 519
 520         clk_add_alias("SA1111_CLK", NULL, "GPIO11_CLK", NULL);
 521         pxa_set_udc_info(&udc_info);
 522         set_pxa_fb_info(&sharp_lm8v31);
 523         pxa_set_mci_info(&lubbock_mci_platform_data);
 524         pxa_set_ficp_info(&lubbock_ficp_platform_data);
 525         pxa_set_ac97_info(NULL);
 526
 527         lubbock_flash_data[0].width = lubbock_flash_data[1].width =
 528                 (BOOT_DEF & 1) ? 2 : 4;
 529         /* Compensate for the nROMBT switch which swaps the flash banks */
 530         printk(KERN_NOTICE "Lubbock configured to boot from %s (bank %d)\n",
 531                flashboot?"Flash":"ROM", flashboot);
 532
 533         lubbock_flash_data[flashboot^1].name = "application-flash";
 534         lubbock_flash_data[flashboot].name = "boot-rom";
 535         (void) platform_add_devices(devices, ARRAY_SIZE(devices));
 536
 537         pxa2xx_set_spi_info(1, &pxa_ssp_master_info);
 538         spi_register_board_info(spi_board_info, ARRAY_SIZE(spi_board_info));
 539 }
 540
 541 static struct map_desc lubbock_io_desc[] __initdata = {
 542         {       /* CPLD */
 543                 .virtual        =  LUBBOCK_FPGA_VIRT,
 544                 .pfn            = __phys_to_pfn(LUBBOCK_FPGA_PHYS),
 545                 .length         = 0x00100000,
 546                 .type           = MT_DEVICE
 547         }
 548 };
 549
 550 static void __init lubbock_map_io(void)
 551 {
 552         pxa_map_io();
 553         iotable_init(lubbock_io_desc, ARRAY_SIZE(lubbock_io_desc));
 554
 555         PCFR |= PCFR_OPDE;
 556 }
 557
 558 MACHINE_START(LUBBOCK, "Intel DBPXA250 Development Platform (aka Lubbock)")
 559         /* Maintainer: MontaVista Software Inc. */
 560         .phys_io        = 0x40000000,
 561         .io_pg_offst    = (io_p2v(0x40000000) >> 18) & 0xfffc,
 562         .map_io         = lubbock_map_io,
 563         .init_irq       = lubbock_init_irq,
 564         .timer          = &pxa_timer,
 565         .init_machine   = lubbock_init,
 566 MACHINE_END