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
  25 #include <linux/spi/spi.h>
  26 #include <linux/spi/ads7846.h>
  27 #include <asm/arch/pxa2xx_spi.h>
  28
  29 #include <asm/setup.h>
  30 #include <asm/memory.h>
  31 #include <asm/mach-types.h>
  32 #include <asm/hardware.h>
  33 #include <asm/irq.h>
  34 #include <asm/sizes.h>
  35
  36 #include <asm/mach/arch.h>
  37 #include <asm/mach/map.h>
  38 #include <asm/mach/irq.h>
  39 #include <asm/mach/flash.h>
  40
  41 #include <asm/hardware/sa1111.h>
  42
  43 #include <asm/arch/pxa-regs.h>
  44 #include <asm/arch/lubbock.h>
  45 #include <asm/arch/udc.h>
  46 #include <asm/arch/irda.h>
  47 #include <asm/arch/pxafb.h>
  48 #include <asm/arch/mmc.h>
  49
  50 #include "generic.h"
  51 #include "devices.h"
  52
  53
  54 #define LUB_MISC_WR             __LUB_REG(LUBBOCK_FPGA_PHYS + 0x080)
  55
  56 void lubbock_set_misc_wr(unsigned int mask, unsigned int set)
  57 {
  58         unsigned long flags;
  59
  60         local_irq_save(flags);
  61         LUB_MISC_WR = (LUB_MISC_WR & ~mask) | (set & mask);
  62         local_irq_restore(flags);
  63 }
  64 EXPORT_SYMBOL(lubbock_set_misc_wr);
  65
  66 static unsigned long lubbock_irq_enabled;
  67
  68 static void lubbock_mask_irq(unsigned int irq)
  69 {
  70         int lubbock_irq = (irq - LUBBOCK_IRQ(0));
  71         LUB_IRQ_MASK_EN = (lubbock_irq_enabled &= ~(1 << lubbock_irq));
  72 }
  73
  74 static void lubbock_unmask_irq(unsigned int irq)
  75 {
  76         int lubbock_irq = (irq - LUBBOCK_IRQ(0));
  77         /* the irq can be acknowledged only if deasserted, so it's done here */
  78         LUB_IRQ_SET_CLR &= ~(1 << lubbock_irq);
  79         LUB_IRQ_MASK_EN = (lubbock_irq_enabled |= (1 << lubbock_irq));
  80 }
  81
  82 static struct irq_chip lubbock_irq_chip = {
  83         .name           = "FPGA",
  84         .ack            = lubbock_mask_irq,
  85         .mask           = lubbock_mask_irq,
  86         .unmask         = lubbock_unmask_irq,
  87 };
  88
  89 static void lubbock_irq_handler(unsigned int irq, struct irq_desc *desc)
  90 {
  91         unsigned long pending = LUB_IRQ_SET_CLR & lubbock_irq_enabled;
  92         do {
  93                 GEDR(0) = GPIO_bit(0);  /* clear our parent irq */
  94                 if (likely(pending)) {
  95                         irq = LUBBOCK_IRQ(0) + __ffs(pending);
  96                         desc = irq_desc + irq;
  97                         desc_handle_irq(irq, desc);
  98                 }
  99                 pending = LUB_IRQ_SET_CLR & lubbock_irq_enabled;
 100         } while (pending);
 101 }
 102
 103 static void __init lubbock_init_irq(void)
 104 {
 105         int irq;
 106
 107         pxa25x_init_irq();
 108
 109         /* setup extra lubbock irqs */
 110         for (irq = LUBBOCK_IRQ(0); irq <= LUBBOCK_LAST_IRQ; irq++) {
 111                 set_irq_chip(irq, &lubbock_irq_chip);
 112                 set_irq_handler(irq, handle_level_irq);
 113                 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
 114         }
 115
 116         set_irq_chained_handler(IRQ_GPIO(0), lubbock_irq_handler);
 117         set_irq_type(IRQ_GPIO(0), IRQT_FALLING);
 118 }
 119
 120 #ifdef CONFIG_PM
 121
 122 static int lubbock_irq_resume(struct sys_device *dev)
 123 {
 124         LUB_IRQ_MASK_EN = lubbock_irq_enabled;
 125         return 0;
 126 }
 127
 128 static struct sysdev_class lubbock_irq_sysclass = {
 129         .name = "cpld_irq",
 130         .resume = lubbock_irq_resume,
 131 };
 132
 133 static struct sys_device lubbock_irq_device = {
 134         .cls = &lubbock_irq_sysclass,
 135 };
 136
 137 static int __init lubbock_irq_device_init(void)
 138 {
 139         int ret = -ENODEV;
 140
 141         if (machine_is_lubbock()) {
 142                 ret = sysdev_class_register(&lubbock_irq_sysclass);
 143                 if (ret == 0)
 144                         ret = sysdev_register(&lubbock_irq_device);
 145         }
 146         return ret;
 147 }
 148
 149 device_initcall(lubbock_irq_device_init);
 150
 151 #endif
 152
 153 static int lubbock_udc_is_connected(void)
 154 {
 155         return (LUB_MISC_RD & (1 << 9)) == 0;
 156 }
 157
 158 static struct pxa2xx_udc_mach_info udc_info __initdata = {
 159         .udc_is_connected       = lubbock_udc_is_connected,
 160         // no D+ pullup; lubbock can't connect/disconnect in software
 161 };
 162
 163 static struct platform_device lub_audio_device = {
 164         .name           = "pxa2xx-ac97",
 165         .id             = -1,
 166 };
 167
 168 static struct resource sa1111_resources[] = {
 169         [0] = {
 170                 .start  = 0x10000000,
 171                 .end    = 0x10001fff,
 172                 .flags  = IORESOURCE_MEM,
 173         },
 174         [1] = {
 175                 .start  = LUBBOCK_SA1111_IRQ,
 176                 .end    = LUBBOCK_SA1111_IRQ,
 177                 .flags  = IORESOURCE_IRQ,
 178         },
 179 };
 180
 181 static struct platform_device sa1111_device = {
 182         .name           = "sa1111",
 183         .id             = -1,
 184         .num_resources  = ARRAY_SIZE(sa1111_resources),
 185         .resource       = sa1111_resources,
 186 };
 187
 188 static struct resource smc91x_resources[] = {
 189         [0] = {
 190                 .name   = "smc91x-regs",
 191                 .start  = 0x0c000c00,
 192                 .end    = 0x0c0fffff,
 193                 .flags  = IORESOURCE_MEM,
 194         },
 195         [1] = {
 196                 .start  = LUBBOCK_ETH_IRQ,
 197                 .end    = LUBBOCK_ETH_IRQ,
 198                 .flags  = IORESOURCE_IRQ,
 199         },
 200         [2] = {
 201                 .name   = "smc91x-attrib",
 202                 .start  = 0x0e000000,
 203                 .end    = 0x0e0fffff,
 204                 .flags  = IORESOURCE_MEM,
 205         },
 206 };
 207
 208 /* ADS7846 is connected through SSP ... and if your board has J5 populated,
 209  * you can select it to replace the ucb1400 by switching the touchscreen cable
 210  * (to J5) and poking board registers (as done below).  Else it's only useful
 211  * for the temperature sensors.
 212  */
 213 static struct pxa2xx_spi_master pxa_ssp_master_info = {
 214         .num_chipselect = 0,
 215 };
 216
 217 static struct platform_device pxa_ssp = {
 218         .name           = "pxa2xx-spi",
 219         .id             = 1,
 220         .dev = {
 221                 .platform_data  = &pxa_ssp_master_info,
 222         },
 223 };
 224
 225 static int lubbock_ads7846_pendown_state(void)
 226 {
 227         /* TS_BUSY is bit 8 in LUB_MISC_RD, but pendown is irq-only */
 228         return 0;
 229 }
 230
 231 static struct ads7846_platform_data ads_info = {
 232         .model                  = 7846,
 233         .vref_delay_usecs       = 100,          /* internal, no cap */
 234         .get_pendown_state      = lubbock_ads7846_pendown_state,
 235         // .x_plate_ohms                = 500,  /* GUESS! */
 236         // .y_plate_ohms                = 500,  /* GUESS! */
 237 };
 238
 239 static void ads7846_cs(u32 command)
 240 {
 241         static const unsigned   TS_nCS = 1 << 11;
 242         lubbock_set_misc_wr(TS_nCS, (command == PXA2XX_CS_ASSERT) ? 0 : TS_nCS);
 243 }
 244
 245 static struct pxa2xx_spi_chip ads_hw = {
 246         .tx_threshold           = 1,
 247         .rx_threshold           = 2,
 248         .cs_control             = ads7846_cs,
 249 };
 250
 251 static struct spi_board_info spi_board_info[] __initdata = { {
 252         .modalias       = "ads7846",
 253         .platform_data  = &ads_info,
 254         .controller_data = &ads_hw,
 255         .irq            = LUBBOCK_BB_IRQ,
 256         .max_speed_hz   = 120000 /* max sample rate at 3V */
 257                                 * 26 /* command + data + overhead */,
 258         .bus_num        = 1,
 259         .chip_select    = 0,
 260 },
 261 };
 262
 263 static struct platform_device smc91x_device = {
 264         .name           = "smc91x",
 265         .id             = -1,
 266         .num_resources  = ARRAY_SIZE(smc91x_resources),
 267         .resource       = smc91x_resources,
 268 };
 269
 270 static struct resource flash_resources[] = {
 271         [0] = {
 272                 .start  = 0x00000000,
 273                 .end    = SZ_64M - 1,
 274                 .flags  = IORESOURCE_MEM,
 275         },
 276         [1] = {
 277                 .start  = 0x04000000,
 278                 .end    = 0x04000000 + SZ_64M - 1,
 279                 .flags  = IORESOURCE_MEM,
 280         },
 281 };
 282
 283 static struct mtd_partition lubbock_partitions[] = {
 284         {
 285                 .name =         "Bootloader",
 286                 .size =         0x00040000,
 287                 .offset =       0,
 288                 .mask_flags =   MTD_WRITEABLE  /* force read-only */
 289         },{
 290                 .name =         "Kernel",
 291                 .size =         0x00100000,
 292                 .offset =       0x00040000,
 293         },{
 294                 .name =         "Filesystem",
 295                 .size =         MTDPART_SIZ_FULL,
 296                 .offset =       0x00140000
 297         }
 298 };
 299
 300 static struct flash_platform_data lubbock_flash_data[2] = {
 301         {
 302                 .map_name       = "cfi_probe",
 303                 .parts          = lubbock_partitions,
 304                 .nr_parts       = ARRAY_SIZE(lubbock_partitions),
 305         }, {
 306                 .map_name       = "cfi_probe",
 307                 .parts          = NULL,
 308                 .nr_parts       = 0,
 309         }
 310 };
 311
 312 static struct platform_device lubbock_flash_device[2] = {
 313         {
 314                 .name           = "pxa2xx-flash",
 315                 .id             = 0,
 316                 .dev = {
 317                         .platform_data = &lubbock_flash_data[0],
 318                 },
 319                 .resource = &flash_resources[0],
 320                 .num_resources = 1,
 321         },
 322         {
 323                 .name           = "pxa2xx-flash",
 324                 .id             = 1,
 325                 .dev = {
 326                         .platform_data = &lubbock_flash_data[1],
 327                 },
 328                 .resource = &flash_resources[1],
 329                 .num_resources = 1,
 330         },
 331 };
 332
 333 static struct platform_device *devices[] __initdata = {
 334         &sa1111_device,
 335         &lub_audio_device,
 336         &smc91x_device,
 337         &lubbock_flash_device[0],
 338         &lubbock_flash_device[1],
 339         &pxa_ssp,
 340 };
 341
 342 static struct pxafb_mode_info sharp_lm8v31_mode = {
 343         .pixclock       = 270000,
 344         .xres           = 640,
 345         .yres           = 480,
 346         .bpp            = 16,
 347         .hsync_len      = 1,
 348         .left_margin    = 3,
 349         .right_margin   = 3,
 350         .vsync_len      = 1,
 351         .upper_margin   = 0,
 352         .lower_margin   = 0,
 353         .sync           = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 354         .cmap_greyscale = 0,
 355 };
 356
 357 static struct pxafb_mach_info sharp_lm8v31 = {
 358         .modes          = &sharp_lm8v31_mode,
 359         .num_modes      = 1,
 360         .cmap_inverse   = 0,
 361         .cmap_static    = 0,
 362         .lccr0          = LCCR0_SDS,
 363         .lccr3          = LCCR3_PCP | LCCR3_Acb(255),
 364 };
 365
 366 #define MMC_POLL_RATE           msecs_to_jiffies(1000)
 367
 368 static void lubbock_mmc_poll(unsigned long);
 369 static irq_handler_t mmc_detect_int;
 370
 371 static struct timer_list mmc_timer = {
 372         .function       = lubbock_mmc_poll,
 373 };
 374
 375 static void lubbock_mmc_poll(unsigned long data)
 376 {
 377         unsigned long flags;
 378
 379         /* clear any previous irq state, then ... */
 380         local_irq_save(flags);
 381         LUB_IRQ_SET_CLR &= ~(1 << 0);
 382         local_irq_restore(flags);
 383
 384         /* poll until mmc/sd card is removed */
 385         if (LUB_IRQ_SET_CLR & (1 << 0))
 386                 mod_timer(&mmc_timer, jiffies + MMC_POLL_RATE);
 387         else {
 388                 (void) mmc_detect_int(LUBBOCK_SD_IRQ, (void *)data);
 389                 enable_irq(LUBBOCK_SD_IRQ);
 390         }
 391 }
 392
 393 static irqreturn_t lubbock_detect_int(int irq, void *data)
 394 {
 395         /* IRQ is level triggered; disable, and poll for removal */
 396         disable_irq(irq);
 397         mod_timer(&mmc_timer, jiffies + MMC_POLL_RATE);
 398
 399         return mmc_detect_int(irq, data);
 400 }
 401
 402 static int lubbock_mci_init(struct device *dev,
 403                 irq_handler_t detect_int,
 404                 void *data)
 405 {
 406         /* setup GPIO for PXA25x MMC controller */
 407         pxa_gpio_mode(GPIO6_MMCCLK_MD);
 408         pxa_gpio_mode(GPIO8_MMCCS0_MD);
 409
 410         /* detect card insert/eject */
 411         mmc_detect_int = detect_int;
 412         init_timer(&mmc_timer);
 413         mmc_timer.data = (unsigned long) data;
 414         return request_irq(LUBBOCK_SD_IRQ, lubbock_detect_int,
 415                         IRQF_SAMPLE_RANDOM, "lubbock-sd-detect", data);
 416 }
 417
 418 static int lubbock_mci_get_ro(struct device *dev)
 419 {
 420         return (LUB_MISC_RD & (1 << 2)) != 0;
 421 }
 422
 423 static void lubbock_mci_exit(struct device *dev, void *data)
 424 {
 425         free_irq(LUBBOCK_SD_IRQ, data);
 426         del_timer_sync(&mmc_timer);
 427 }
 428
 429 static struct pxamci_platform_data lubbock_mci_platform_data = {
 430         .ocr_mask       = MMC_VDD_32_33|MMC_VDD_33_34,
 431         .detect_delay   = 1,
 432         .init           = lubbock_mci_init,
 433         .get_ro         = lubbock_mci_get_ro,
 434         .exit           = lubbock_mci_exit,
 435 };
 436
 437 static void lubbock_irda_transceiver_mode(struct device *dev, int mode)
 438 {
 439         unsigned long flags;
 440
 441         local_irq_save(flags);
 442         if (mode & IR_SIRMODE) {
 443                 LUB_MISC_WR &= ~(1 << 4);
 444         } else if (mode & IR_FIRMODE) {
 445                 LUB_MISC_WR |= 1 << 4;
 446         }
 447         local_irq_restore(flags);
 448 }
 449
 450 static struct pxaficp_platform_data lubbock_ficp_platform_data = {
 451         .transceiver_cap  = IR_SIRMODE | IR_FIRMODE,
 452         .transceiver_mode = lubbock_irda_transceiver_mode,
 453 };
 454
 455 static void __init lubbock_init(void)
 456 {
 457         int flashboot = (LUB_CONF_SWITCHES & 1);
 458
 459         pxa_set_udc_info(&udc_info);
 460         set_pxa_fb_info(&sharp_lm8v31);
 461         pxa_set_mci_info(&lubbock_mci_platform_data);
 462         pxa_set_ficp_info(&lubbock_ficp_platform_data);
 463
 464         lubbock_flash_data[0].width = lubbock_flash_data[1].width =
 465                 (BOOT_DEF & 1) ? 2 : 4;
 466         /* Compensate for the nROMBT switch which swaps the flash banks */
 467         printk(KERN_NOTICE "Lubbock configured to boot from %s (bank %d)\n",
 468                flashboot?"Flash":"ROM", flashboot);
 469
 470         lubbock_flash_data[flashboot^1].name = "application-flash";
 471         lubbock_flash_data[flashboot].name = "boot-rom";
 472         (void) platform_add_devices(devices, ARRAY_SIZE(devices));
 473
 474         spi_register_board_info(spi_board_info, ARRAY_SIZE(spi_board_info));
 475 }
 476
 477 static struct map_desc lubbock_io_desc[] __initdata = {
 478         {       /* CPLD */
 479                 .virtual        =  LUBBOCK_FPGA_VIRT,
 480                 .pfn            = __phys_to_pfn(LUBBOCK_FPGA_PHYS),
 481                 .length         = 0x00100000,
 482                 .type           = MT_DEVICE
 483         }
 484 };
 485
 486 static void __init lubbock_map_io(void)
 487 {
 488         pxa_map_io();
 489         iotable_init(lubbock_io_desc, ARRAY_SIZE(lubbock_io_desc));
 490
 491         /* SSP data pins */
 492         pxa_gpio_mode(GPIO23_SCLK_MD);
 493         pxa_gpio_mode(GPIO25_STXD_MD);
 494         pxa_gpio_mode(GPIO26_SRXD_MD);
 495
 496         /* This enables the BTUART */
 497         pxa_gpio_mode(GPIO42_BTRXD_MD);
 498         pxa_gpio_mode(GPIO43_BTTXD_MD);
 499         pxa_gpio_mode(GPIO44_BTCTS_MD);
 500         pxa_gpio_mode(GPIO45_BTRTS_MD);
 501
 502         GPSR(GPIO48_nPOE) =
 503                 GPIO_bit(GPIO48_nPOE) |
 504                 GPIO_bit(GPIO49_nPWE) |
 505                 GPIO_bit(GPIO50_nPIOR) |
 506                 GPIO_bit(GPIO51_nPIOW) |
 507                 GPIO_bit(GPIO52_nPCE_1) |
 508                 GPIO_bit(GPIO53_nPCE_2);
 509
 510         pxa_gpio_mode(GPIO48_nPOE_MD);
 511         pxa_gpio_mode(GPIO49_nPWE_MD);
 512         pxa_gpio_mode(GPIO50_nPIOR_MD);
 513         pxa_gpio_mode(GPIO51_nPIOW_MD);
 514         pxa_gpio_mode(GPIO52_nPCE_1_MD);
 515         pxa_gpio_mode(GPIO53_nPCE_2_MD);
 516         pxa_gpio_mode(GPIO54_pSKTSEL_MD);
 517         pxa_gpio_mode(GPIO55_nPREG_MD);
 518         pxa_gpio_mode(GPIO56_nPWAIT_MD);
 519         pxa_gpio_mode(GPIO57_nIOIS16_MD);
 520
 521         /* This is for the SMC chip select */
 522         pxa_gpio_mode(GPIO79_nCS_3_MD);
 523
 524         /* setup sleep mode values */
 525         PWER  = 0x00000002;
 526         PFER  = 0x00000000;
 527         PRER  = 0x00000002;
 528         PGSR0 = 0x00008000;
 529         PGSR1 = 0x003F0202;
 530         PGSR2 = 0x0001C000;
 531         PCFR |= PCFR_OPDE;
 532 }
 533
 534 MACHINE_START(LUBBOCK, "Intel DBPXA250 Development Platform (aka Lubbock)")
 535         /* Maintainer: MontaVista Software Inc. */
 536         .phys_io        = 0x40000000,
 537         .io_pg_offst    = (io_p2v(0x40000000) >> 18) & 0xfffc,
 538         .map_io         = lubbock_map_io,
 539         .init_irq       = lubbock_init_irq,
 540         .timer          = &pxa_timer,
 541         .init_machine   = lubbock_init,
 542 MACHINE_END