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         /* LCD - 16bpp DSTN */
  70         GPIO58_LCD_LDD_0,
  71         GPIO59_LCD_LDD_1,
  72         GPIO60_LCD_LDD_2,
  73         GPIO61_LCD_LDD_3,
  74         GPIO62_LCD_LDD_4,
  75         GPIO63_LCD_LDD_5,
  76         GPIO64_LCD_LDD_6,
  77         GPIO65_LCD_LDD_7,
  78         GPIO66_LCD_LDD_8,
  79         GPIO67_LCD_LDD_9,
  80         GPIO68_LCD_LDD_10,
  81         GPIO69_LCD_LDD_11,
  82         GPIO70_LCD_LDD_12,
  83         GPIO71_LCD_LDD_13,
  84         GPIO72_LCD_LDD_14,
  85         GPIO73_LCD_LDD_15,
  86         GPIO74_LCD_FCLK,
  87         GPIO75_LCD_LCLK,
  88         GPIO76_LCD_PCLK,
  89
  90         /* BTUART */
  91         GPIO42_BTUART_RXD,
  92         GPIO43_BTUART_TXD,
  93         GPIO44_BTUART_CTS,
  94         GPIO45_BTUART_RTS,
  95
  96         /* PC Card */
  97         GPIO48_nPOE,
  98         GPIO49_nPWE,
  99         GPIO50_nPIOR,
 100         GPIO51_nPIOW,
 101         GPIO52_nPCE_1,
 102         GPIO53_nPCE_2,
 103         GPIO54_nPSKTSEL,
 104         GPIO55_nPREG,
 105         GPIO56_nPWAIT,
 106         GPIO57_nIOIS16,
 107
 108         /* MMC */
 109         GPIO6_MMC_CLK,
 110         GPIO8_MMC_CS0,
 111
 112         /* wakeup */
 113         GPIO1_GPIO | WAKEUP_ON_EDGE_RISE,
 114 };
 115
 116 #define LUB_HEXLED              __LUB_REG(LUBBOCK_FPGA_PHYS + 0x010)
 117 #define LUB_MISC_WR             __LUB_REG(LUBBOCK_FPGA_PHYS + 0x080)
 118
 119 void lubbock_set_hexled(uint32_t value)
 120 {
 121         LUB_HEXLED = value;
 122 }
 123
 124 void lubbock_set_misc_wr(unsigned int mask, unsigned int set)
 125 {
 126         unsigned long flags;
 127
 128         local_irq_save(flags);
 129         LUB_MISC_WR = (LUB_MISC_WR & ~mask) | (set & mask);
 130         local_irq_restore(flags);
 131 }
 132 EXPORT_SYMBOL(lubbock_set_misc_wr);
 133
 134 static unsigned long lubbock_irq_enabled;
 135
 136 static void lubbock_mask_irq(unsigned int irq)
 137 {
 138         int lubbock_irq = (irq - LUBBOCK_IRQ(0));
 139         LUB_IRQ_MASK_EN = (lubbock_irq_enabled &= ~(1 << lubbock_irq));
 140 }
 141
 142 static void lubbock_unmask_irq(unsigned int irq)
 143 {
 144         int lubbock_irq = (irq - LUBBOCK_IRQ(0));
 145         /* the irq can be acknowledged only if deasserted, so it's done here */
 146         LUB_IRQ_SET_CLR &= ~(1 << lubbock_irq);
 147         LUB_IRQ_MASK_EN = (lubbock_irq_enabled |= (1 << lubbock_irq));
 148 }
 149
 150 static struct irq_chip lubbock_irq_chip = {
 151         .name           = "FPGA",
 152         .ack            = lubbock_mask_irq,
 153         .mask           = lubbock_mask_irq,
 154         .unmask         = lubbock_unmask_irq,
 155 };
 156
 157 static void lubbock_irq_handler(unsigned int irq, struct irq_desc *desc)
 158 {
 159         unsigned long pending = LUB_IRQ_SET_CLR & lubbock_irq_enabled;
 160         do {
 161                 GEDR(0) = GPIO_bit(0);  /* clear our parent irq */
 162                 if (likely(pending)) {
 163                         irq = LUBBOCK_IRQ(0) + __ffs(pending);
 164                         generic_handle_irq(irq);
 165                 }
 166                 pending = LUB_IRQ_SET_CLR & lubbock_irq_enabled;
 167         } while (pending);
 168 }
 169
 170 static void __init lubbock_init_irq(void)
 171 {
 172         int irq;
 173
 174         pxa25x_init_irq();
 175
 176         /* setup extra lubbock irqs */
 177         for (irq = LUBBOCK_IRQ(0); irq <= LUBBOCK_LAST_IRQ; irq++) {
 178                 set_irq_chip(irq, &lubbock_irq_chip);
 179                 set_irq_handler(irq, handle_level_irq);
 180                 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
 181         }
 182
 183         set_irq_chained_handler(IRQ_GPIO(0), lubbock_irq_handler);
 184         set_irq_type(IRQ_GPIO(0), IRQ_TYPE_EDGE_FALLING);
 185 }
 186
 187 #ifdef CONFIG_PM
 188
 189 static int lubbock_irq_resume(struct sys_device *dev)
 190 {
 191         LUB_IRQ_MASK_EN = lubbock_irq_enabled;
 192         return 0;
 193 }
 194
 195 static struct sysdev_class lubbock_irq_sysclass = {
 196         .name = "cpld_irq",
 197         .resume = lubbock_irq_resume,
 198 };
 199
 200 static struct sys_device lubbock_irq_device = {
 201         .cls = &lubbock_irq_sysclass,
 202 };
 203
 204 static int __init lubbock_irq_device_init(void)
 205 {
 206         int ret = -ENODEV;
 207
 208         if (machine_is_lubbock()) {
 209                 ret = sysdev_class_register(&lubbock_irq_sysclass);
 210                 if (ret == 0)
 211                         ret = sysdev_register(&lubbock_irq_device);
 212         }
 213         return ret;
 214 }
 215
 216 device_initcall(lubbock_irq_device_init);
 217
 218 #endif
 219
 220 static int lubbock_udc_is_connected(void)
 221 {
 222         return (LUB_MISC_RD & (1 << 9)) == 0;
 223 }
 224
 225 static struct pxa2xx_udc_mach_info udc_info __initdata = {
 226         .udc_is_connected       = lubbock_udc_is_connected,
 227         // no D+ pullup; lubbock can't connect/disconnect in software
 228 };
 229
 230 static struct resource sa1111_resources[] = {
 231         [0] = {
 232                 .start  = 0x10000000,
 233                 .end    = 0x10001fff,
 234                 .flags  = IORESOURCE_MEM,
 235         },
 236         [1] = {
 237                 .start  = LUBBOCK_SA1111_IRQ,
 238                 .end    = LUBBOCK_SA1111_IRQ,
 239                 .flags  = IORESOURCE_IRQ,
 240         },
 241 };
 242
 243 static struct platform_device sa1111_device = {
 244         .name           = "sa1111",
 245         .id             = -1,
 246         .num_resources  = ARRAY_SIZE(sa1111_resources),
 247         .resource       = sa1111_resources,
 248 };
 249
 250 /* ADS7846 is connected through SSP ... and if your board has J5 populated,
 251  * you can select it to replace the ucb1400 by switching the touchscreen cable
 252  * (to J5) and poking board registers (as done below).  Else it's only useful
 253  * for the temperature sensors.
 254  */
 255 static struct pxa2xx_spi_master pxa_ssp_master_info = {
 256         .num_chipselect = 1,
 257 };
 258
 259 static int lubbock_ads7846_pendown_state(void)
 260 {
 261         /* TS_BUSY is bit 8 in LUB_MISC_RD, but pendown is irq-only */
 262         return 0;
 263 }
 264
 265 static struct ads7846_platform_data ads_info = {
 266         .model                  = 7846,
 267         .vref_delay_usecs       = 100,          /* internal, no cap */
 268         .get_pendown_state      = lubbock_ads7846_pendown_state,
 269         // .x_plate_ohms                = 500,  /* GUESS! */
 270         // .y_plate_ohms                = 500,  /* GUESS! */
 271 };
 272
 273 static void ads7846_cs(u32 command)
 274 {
 275         static const unsigned   TS_nCS = 1 << 11;
 276         lubbock_set_misc_wr(TS_nCS, (command == PXA2XX_CS_ASSERT) ? 0 : TS_nCS);
 277 }
 278
 279 static struct pxa2xx_spi_chip ads_hw = {
 280         .tx_threshold           = 1,
 281         .rx_threshold           = 2,
 282         .cs_control             = ads7846_cs,
 283 };
 284
 285 static struct spi_board_info spi_board_info[] __initdata = { {
 286         .modalias       = "ads7846",
 287         .platform_data  = &ads_info,
 288         .controller_data = &ads_hw,
 289         .irq            = LUBBOCK_BB_IRQ,
 290         .max_speed_hz   = 120000 /* max sample rate at 3V */
 291                                 * 26 /* command + data + overhead */,
 292         .bus_num        = 1,
 293         .chip_select    = 0,
 294 },
 295 };
 296
 297 static struct resource smc91x_resources[] = {
 298         [0] = {
 299                 .name   = "smc91x-regs",
 300                 .start  = 0x0c000c00,
 301                 .end    = 0x0c0fffff,
 302                 .flags  = IORESOURCE_MEM,
 303         },
 304         [1] = {
 305                 .start  = LUBBOCK_ETH_IRQ,
 306                 .end    = LUBBOCK_ETH_IRQ,
 307                 .flags  = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
 308         },
 309         [2] = {
 310                 .name   = "smc91x-attrib",
 311                 .start  = 0x0e000000,
 312                 .end    = 0x0e0fffff,
 313                 .flags  = IORESOURCE_MEM,
 314         },
 315 };
 316
 317 static struct smc91x_platdata lubbock_smc91x_info = {
 318         .flags  = SMC91X_USE_16BIT | SMC91X_NOWAIT | SMC91X_IO_SHIFT_2,
 319 };
 320
 321 static struct platform_device smc91x_device = {
 322         .name           = "smc91x",
 323         .id             = -1,
 324         .num_resources  = ARRAY_SIZE(smc91x_resources),
 325         .resource       = smc91x_resources,
 326         .dev            = {
 327                 .platform_data = &lubbock_smc91x_info,
 328         },
 329 };
 330
 331 static struct resource flash_resources[] = {
 332         [0] = {
 333                 .start  = 0x00000000,
 334                 .end    = SZ_64M - 1,
 335                 .flags  = IORESOURCE_MEM,
 336         },
 337         [1] = {
 338                 .start  = 0x04000000,
 339                 .end    = 0x04000000 + SZ_64M - 1,
 340                 .flags  = IORESOURCE_MEM,
 341         },
 342 };
 343
 344 static struct mtd_partition lubbock_partitions[] = {
 345         {
 346                 .name =         "Bootloader",
 347                 .size =         0x00040000,
 348                 .offset =       0,
 349                 .mask_flags =   MTD_WRITEABLE  /* force read-only */
 350         },{
 351                 .name =         "Kernel",
 352                 .size =         0x00100000,
 353                 .offset =       0x00040000,
 354         },{
 355                 .name =         "Filesystem",
 356                 .size =         MTDPART_SIZ_FULL,
 357                 .offset =       0x00140000
 358         }
 359 };
 360
 361 static struct flash_platform_data lubbock_flash_data[2] = {
 362         {
 363                 .map_name       = "cfi_probe",
 364                 .parts          = lubbock_partitions,
 365                 .nr_parts       = ARRAY_SIZE(lubbock_partitions),
 366         }, {
 367                 .map_name       = "cfi_probe",
 368                 .parts          = NULL,
 369                 .nr_parts       = 0,
 370         }
 371 };
 372
 373 static struct platform_device lubbock_flash_device[2] = {
 374         {
 375                 .name           = "pxa2xx-flash",
 376                 .id             = 0,
 377                 .dev = {
 378                         .platform_data = &lubbock_flash_data[0],
 379                 },
 380                 .resource = &flash_resources[0],
 381                 .num_resources = 1,
 382         },
 383         {
 384                 .name           = "pxa2xx-flash",
 385                 .id             = 1,
 386                 .dev = {
 387                         .platform_data = &lubbock_flash_data[1],
 388                 },
 389                 .resource = &flash_resources[1],
 390                 .num_resources = 1,
 391         },
 392 };
 393
 394 static struct platform_device *devices[] __initdata = {
 395         &sa1111_device,
 396         &smc91x_device,
 397         &lubbock_flash_device[0],
 398         &lubbock_flash_device[1],
 399 };
 400
 401 static struct pxafb_mode_info sharp_lm8v31_mode = {
 402         .pixclock       = 270000,
 403         .xres           = 640,
 404         .yres           = 480,
 405         .bpp            = 16,
 406         .hsync_len      = 1,
 407         .left_margin    = 3,
 408         .right_margin   = 3,
 409         .vsync_len      = 1,
 410         .upper_margin   = 0,
 411         .lower_margin   = 0,
 412         .sync           = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 413         .cmap_greyscale = 0,
 414 };
 415
 416 static struct pxafb_mach_info sharp_lm8v31 = {
 417         .modes          = &sharp_lm8v31_mode,
 418         .num_modes      = 1,
 419         .cmap_inverse   = 0,
 420         .cmap_static    = 0,
 421         .lcd_conn       = LCD_COLOR_DSTN_16BPP | LCD_PCLK_EDGE_FALL |
 422                           LCD_AC_BIAS_FREQ(255),
 423 };
 424
 425 #define MMC_POLL_RATE           msecs_to_jiffies(1000)
 426
 427 static void lubbock_mmc_poll(unsigned long);
 428 static irq_handler_t mmc_detect_int;
 429
 430 static struct timer_list mmc_timer = {
 431         .function       = lubbock_mmc_poll,
 432 };
 433
 434 static void lubbock_mmc_poll(unsigned long data)
 435 {
 436         unsigned long flags;
 437
 438         /* clear any previous irq state, then ... */
 439         local_irq_save(flags);
 440         LUB_IRQ_SET_CLR &= ~(1 << 0);
 441         local_irq_restore(flags);
 442
 443         /* poll until mmc/sd card is removed */
 444         if (LUB_IRQ_SET_CLR & (1 << 0))
 445                 mod_timer(&mmc_timer, jiffies + MMC_POLL_RATE);
 446         else {
 447                 (void) mmc_detect_int(LUBBOCK_SD_IRQ, (void *)data);
 448                 enable_irq(LUBBOCK_SD_IRQ);
 449         }
 450 }
 451
 452 static irqreturn_t lubbock_detect_int(int irq, void *data)
 453 {
 454         /* IRQ is level triggered; disable, and poll for removal */
 455         disable_irq(irq);
 456         mod_timer(&mmc_timer, jiffies + MMC_POLL_RATE);
 457
 458         return mmc_detect_int(irq, data);
 459 }
 460
 461 static int lubbock_mci_init(struct device *dev,
 462                 irq_handler_t detect_int,
 463                 void *data)
 464 {
 465         /* detect card insert/eject */
 466         mmc_detect_int = detect_int;
 467         init_timer(&mmc_timer);
 468         mmc_timer.data = (unsigned long) data;
 469         return request_irq(LUBBOCK_SD_IRQ, lubbock_detect_int,
 470                         IRQF_SAMPLE_RANDOM, "lubbock-sd-detect", data);
 471 }
 472
 473 static int lubbock_mci_get_ro(struct device *dev)
 474 {
 475         return (LUB_MISC_RD & (1 << 2)) != 0;
 476 }
 477
 478 static void lubbock_mci_exit(struct device *dev, void *data)
 479 {
 480         free_irq(LUBBOCK_SD_IRQ, data);
 481         del_timer_sync(&mmc_timer);
 482 }
 483
 484 static struct pxamci_platform_data lubbock_mci_platform_data = {
 485         .ocr_mask       = MMC_VDD_32_33|MMC_VDD_33_34,
 486         .detect_delay   = 1,
 487         .init           = lubbock_mci_init,
 488         .get_ro         = lubbock_mci_get_ro,
 489         .exit           = lubbock_mci_exit,
 490 };
 491
 492 static void lubbock_irda_transceiver_mode(struct device *dev, int mode)
 493 {
 494         unsigned long flags;
 495
 496         local_irq_save(flags);
 497         if (mode & IR_SIRMODE) {
 498                 LUB_MISC_WR &= ~(1 << 4);
 499         } else if (mode & IR_FIRMODE) {
 500                 LUB_MISC_WR |= 1 << 4;
 501         }
 502         pxa2xx_transceiver_mode(dev, mode);
 503         local_irq_restore(flags);
 504 }
 505
 506 static struct pxaficp_platform_data lubbock_ficp_platform_data = {
 507         .transceiver_cap  = IR_SIRMODE | IR_FIRMODE,
 508         .transceiver_mode = lubbock_irda_transceiver_mode,
 509 };
 510
 511 static void __init lubbock_init(void)
 512 {
 513         int flashboot = (LUB_CONF_SWITCHES & 1);
 514
 515         pxa2xx_mfp_config(ARRAY_AND_SIZE(lubbock_pin_config));
 516
 517         clk_add_alias("SA1111_CLK", NULL, "GPIO11_CLK", NULL);
 518         pxa_set_udc_info(&udc_info);
 519         set_pxa_fb_info(&sharp_lm8v31);
 520         pxa_set_mci_info(&lubbock_mci_platform_data);
 521         pxa_set_ficp_info(&lubbock_ficp_platform_data);
 522         pxa_set_ac97_info(NULL);
 523
 524         lubbock_flash_data[0].width = lubbock_flash_data[1].width =
 525                 (BOOT_DEF & 1) ? 2 : 4;
 526         /* Compensate for the nROMBT switch which swaps the flash banks */
 527         printk(KERN_NOTICE "Lubbock configured to boot from %s (bank %d)\n",
 528                flashboot?"Flash":"ROM", flashboot);
 529
 530         lubbock_flash_data[flashboot^1].name = "application-flash";
 531         lubbock_flash_data[flashboot].name = "boot-rom";
 532         (void) platform_add_devices(devices, ARRAY_SIZE(devices));
 533
 534         pxa2xx_set_spi_info(1, &pxa_ssp_master_info);
 535         spi_register_board_info(spi_board_info, ARRAY_SIZE(spi_board_info));
 536 }
 537
 538 static struct map_desc lubbock_io_desc[] __initdata = {
 539         {       /* CPLD */
 540                 .virtual        =  LUBBOCK_FPGA_VIRT,
 541                 .pfn            = __phys_to_pfn(LUBBOCK_FPGA_PHYS),
 542                 .length         = 0x00100000,
 543                 .type           = MT_DEVICE
 544         }
 545 };
 546
 547 static void __init lubbock_map_io(void)
 548 {
 549         pxa_map_io();
 550         iotable_init(lubbock_io_desc, ARRAY_SIZE(lubbock_io_desc));
 551
 552         PCFR |= PCFR_OPDE;
 553 }
 554
 555 MACHINE_START(LUBBOCK, "Intel DBPXA250 Development Platform (aka Lubbock)")
 556         /* Maintainer: MontaVista Software Inc. */
 557         .phys_io        = 0x40000000,
 558         .io_pg_offst    = (io_p2v(0x40000000) >> 18) & 0xfffc,
 559         .map_io         = lubbock_map_io,
 560         .init_irq       = lubbock_init_irq,
 561         .timer          = &pxa_timer,
 562         .init_machine   = lubbock_init,
 563 MACHINE_END