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
  52
  53 #define LUB_MISC_WR             __LUB_REG(LUBBOCK_FPGA_PHYS + 0x080)
  54
  55 void lubbock_set_misc_wr(unsigned int mask, unsigned int set)
  56 {
  57         unsigned long flags;
  58
  59         local_irq_save(flags);
  60         LUB_MISC_WR = (LUB_MISC_WR & ~mask) | (set & mask);
  61         local_irq_restore(flags);
  62 }
  63 EXPORT_SYMBOL(lubbock_set_misc_wr);
  64
  65 static unsigned long lubbock_irq_enabled;
  66
  67 static void lubbock_mask_irq(unsigned int irq)
  68 {
  69         int lubbock_irq = (irq - LUBBOCK_IRQ(0));
  70         LUB_IRQ_MASK_EN = (lubbock_irq_enabled &= ~(1 << lubbock_irq));
  71 }
  72
  73 static void lubbock_unmask_irq(unsigned int irq)
  74 {
  75         int lubbock_irq = (irq - LUBBOCK_IRQ(0));
  76         /* the irq can be acknowledged only if deasserted, so it's done here */
  77         LUB_IRQ_SET_CLR &= ~(1 << lubbock_irq);
  78         LUB_IRQ_MASK_EN = (lubbock_irq_enabled |= (1 << lubbock_irq));
  79 }
  80
  81 static struct irq_chip lubbock_irq_chip = {
  82         .name           = "FPGA",
  83         .ack            = lubbock_mask_irq,
  84         .mask           = lubbock_mask_irq,
  85         .unmask         = lubbock_unmask_irq,
  86 };
  87
  88 static void lubbock_irq_handler(unsigned int irq, struct irqdesc *desc,
  89                                 struct pt_regs *regs)
  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, regs);
  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         pxa_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, do_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         set_kset_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 = sysdev_class_register(&lubbock_irq_sysclass);
 140         if (ret == 0)
 141                 ret = sysdev_register(&lubbock_irq_device);
 142         return ret;
 143 }
 144
 145 device_initcall(lubbock_irq_device_init);
 146
 147 #endif
 148
 149 static int lubbock_udc_is_connected(void)
 150 {
 151         return (LUB_MISC_RD & (1 << 9)) == 0;
 152 }
 153
 154 static struct pxa2xx_udc_mach_info udc_info __initdata = {
 155         .udc_is_connected       = lubbock_udc_is_connected,
 156         // no D+ pullup; lubbock can't connect/disconnect in software
 157 };
 158
 159 static struct platform_device lub_audio_device = {
 160         .name           = "pxa2xx-ac97",
 161         .id             = -1,
 162 };
 163
 164 static struct resource sa1111_resources[] = {
 165         [0] = {
 166                 .start  = 0x10000000,
 167                 .end    = 0x10001fff,
 168                 .flags  = IORESOURCE_MEM,
 169         },
 170         [1] = {
 171                 .start  = LUBBOCK_SA1111_IRQ,
 172                 .end    = LUBBOCK_SA1111_IRQ,
 173                 .flags  = IORESOURCE_IRQ,
 174         },
 175 };
 176
 177 static struct platform_device sa1111_device = {
 178         .name           = "sa1111",
 179         .id             = -1,
 180         .num_resources  = ARRAY_SIZE(sa1111_resources),
 181         .resource       = sa1111_resources,
 182 };
 183
 184 static struct resource smc91x_resources[] = {
 185         [0] = {
 186                 .name   = "smc91x-regs",
 187                 .start  = 0x0c000c00,
 188                 .end    = 0x0c0fffff,
 189                 .flags  = IORESOURCE_MEM,
 190         },
 191         [1] = {
 192                 .start  = LUBBOCK_ETH_IRQ,
 193                 .end    = LUBBOCK_ETH_IRQ,
 194                 .flags  = IORESOURCE_IRQ,
 195         },
 196         [2] = {
 197                 .name   = "smc91x-attrib",
 198                 .start  = 0x0e000000,
 199                 .end    = 0x0e0fffff,
 200                 .flags  = IORESOURCE_MEM,
 201         },
 202 };
 203
 204 /* ADS7846 is connected through SSP ... and if your board has J5 populated,
 205  * you can select it to replace the ucb1400 by switching the touchscreen cable
 206  * (to J5) and poking board registers (as done below).  Else it's only useful
 207  * for the temperature sensors.
 208  */
 209 static struct resource pxa_ssp_resources[] = {
 210         [0] = {
 211                 .start  = __PREG(SSCR0_P(1)),
 212                 .end    = __PREG(SSCR0_P(1)) + 0x14,
 213                 .flags  = IORESOURCE_MEM,
 214         },
 215         [1] = {
 216                 .start  = IRQ_SSP,
 217                 .end    = IRQ_SSP,
 218                 .flags  = IORESOURCE_IRQ,
 219         },
 220 };
 221
 222 static struct pxa2xx_spi_master pxa_ssp_master_info = {
 223         .ssp_type       = PXA25x_SSP,
 224         .clock_enable   = CKEN3_SSP,
 225         .num_chipselect = 0,
 226 };
 227
 228 static struct platform_device pxa_ssp = {
 229         .name           = "pxa2xx-spi",
 230         .id             = 1,
 231         .resource       = pxa_ssp_resources,
 232         .num_resources  = ARRAY_SIZE(pxa_ssp_resources),
 233         .dev = {
 234                 .platform_data  = &pxa_ssp_master_info,
 235         },
 236 };
 237
 238 static int lubbock_ads7846_pendown_state(void)
 239 {
 240         /* TS_BUSY is bit 8 in LUB_MISC_RD, but pendown is irq-only */
 241         return 0;
 242 }
 243
 244 static struct ads7846_platform_data ads_info = {
 245         .model                  = 7846,
 246         .vref_delay_usecs       = 100,          /* internal, no cap */
 247         .get_pendown_state      = lubbock_ads7846_pendown_state,
 248         // .x_plate_ohms                = 500,  /* GUESS! */
 249         // .y_plate_ohms                = 500,  /* GUESS! */
 250 };
 251
 252 static void ads7846_cs(u32 command)
 253 {
 254         static const unsigned   TS_nCS = 1 << 11;
 255         lubbock_set_misc_wr(TS_nCS, (command == PXA2XX_CS_ASSERT) ? 0 : TS_nCS);
 256 }
 257
 258 static struct pxa2xx_spi_chip ads_hw = {
 259         .tx_threshold           = 1,
 260         .rx_threshold           = 2,
 261         .cs_control             = ads7846_cs,
 262 };
 263
 264 static struct spi_board_info spi_board_info[] __initdata = { {
 265         .modalias       = "ads7846",
 266         .platform_data  = &ads_info,
 267         .controller_data = &ads_hw,
 268         .irq            = LUBBOCK_BB_IRQ,
 269         .max_speed_hz   = 120000 /* max sample rate at 3V */
 270                                 * 26 /* command + data + overhead */,
 271         .bus_num        = 1,
 272         .chip_select    = 0,
 273 },
 274 };
 275
 276 static struct platform_device smc91x_device = {
 277         .name           = "smc91x",
 278         .id             = -1,
 279         .num_resources  = ARRAY_SIZE(smc91x_resources),
 280         .resource       = smc91x_resources,
 281 };
 282
 283 static struct resource flash_resources[] = {
 284         [0] = {
 285                 .start  = 0x00000000,
 286                 .end    = SZ_64M - 1,
 287                 .flags  = IORESOURCE_MEM,
 288         },
 289         [1] = {
 290                 .start  = 0x04000000,
 291                 .end    = 0x04000000 + SZ_64M - 1,
 292                 .flags  = IORESOURCE_MEM,
 293         },
 294 };
 295
 296 static struct mtd_partition lubbock_partitions[] = {
 297         {
 298                 .name =         "Bootloader",
 299                 .size =         0x00040000,
 300                 .offset =       0,
 301                 .mask_flags =   MTD_WRITEABLE  /* force read-only */
 302         },{
 303                 .name =         "Kernel",
 304                 .size =         0x00100000,
 305                 .offset =       0x00040000,
 306         },{
 307                 .name =         "Filesystem",
 308                 .size =         MTDPART_SIZ_FULL,
 309                 .offset =       0x00140000
 310         }
 311 };
 312
 313 static struct flash_platform_data lubbock_flash_data[2] = {
 314         {
 315                 .map_name       = "cfi_probe",
 316                 .parts          = lubbock_partitions,
 317                 .nr_parts       = ARRAY_SIZE(lubbock_partitions),
 318         }, {
 319                 .map_name       = "cfi_probe",
 320                 .parts          = NULL,
 321                 .nr_parts       = 0,
 322         }
 323 };
 324
 325 static struct platform_device lubbock_flash_device[2] = {
 326         {
 327                 .name           = "pxa2xx-flash",
 328                 .id             = 0,
 329                 .dev = {
 330                         .platform_data = &lubbock_flash_data[0],
 331                 },
 332                 .resource = &flash_resources[0],
 333                 .num_resources = 1,
 334         },
 335         {
 336                 .name           = "pxa2xx-flash",
 337                 .id             = 1,
 338                 .dev = {
 339                         .platform_data = &lubbock_flash_data[1],
 340                 },
 341                 .resource = &flash_resources[1],
 342                 .num_resources = 1,
 343         },
 344 };
 345
 346 static struct platform_device *devices[] __initdata = {
 347         &sa1111_device,
 348         &lub_audio_device,
 349         &smc91x_device,
 350         &lubbock_flash_device[0],
 351         &lubbock_flash_device[1],
 352         &pxa_ssp,
 353 };
 354
 355 static struct pxafb_mach_info sharp_lm8v31 __initdata = {
 356         .pixclock       = 270000,
 357         .xres           = 640,
 358         .yres           = 480,
 359         .bpp            = 16,
 360         .hsync_len      = 1,
 361         .left_margin    = 3,
 362         .right_margin   = 3,
 363         .vsync_len      = 1,
 364         .upper_margin   = 0,
 365         .lower_margin   = 0,
 366         .sync           = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 367         .cmap_greyscale = 0,
 368         .cmap_inverse   = 0,
 369         .cmap_static    = 0,
 370         .lccr0          = LCCR0_SDS,
 371         .lccr3          = LCCR3_PCP | LCCR3_Acb(255),
 372 };
 373
 374 #define MMC_POLL_RATE           msecs_to_jiffies(1000)
 375
 376 static void lubbock_mmc_poll(unsigned long);
 377 static irqreturn_t (*mmc_detect_int)(int, void *, struct pt_regs *);
 378
 379 static struct timer_list mmc_timer = {
 380         .function       = lubbock_mmc_poll,
 381 };
 382
 383 static void lubbock_mmc_poll(unsigned long data)
 384 {
 385         unsigned long flags;
 386
 387         /* clear any previous irq state, then ... */
 388         local_irq_save(flags);
 389         LUB_IRQ_SET_CLR &= ~(1 << 0);
 390         local_irq_restore(flags);
 391
 392         /* poll until mmc/sd card is removed */
 393         if (LUB_IRQ_SET_CLR & (1 << 0))
 394                 mod_timer(&mmc_timer, jiffies + MMC_POLL_RATE);
 395         else {
 396                 (void) mmc_detect_int(LUBBOCK_SD_IRQ, (void *)data, NULL);
 397                 enable_irq(LUBBOCK_SD_IRQ);
 398         }
 399 }
 400
 401 static irqreturn_t lubbock_detect_int(int irq, void *data, struct pt_regs *regs)
 402 {
 403         /* IRQ is level triggered; disable, and poll for removal */
 404         disable_irq(irq);
 405         mod_timer(&mmc_timer, jiffies + MMC_POLL_RATE);
 406
 407         return mmc_detect_int(irq, data, regs);
 408 }
 409
 410 static int lubbock_mci_init(struct device *dev,
 411                 irqreturn_t (*detect_int)(int, void *, struct pt_regs *),
 412                 void *data)
 413 {
 414         /* setup GPIO for PXA25x MMC controller */
 415         pxa_gpio_mode(GPIO6_MMCCLK_MD);
 416         pxa_gpio_mode(GPIO8_MMCCS0_MD);
 417
 418         /* detect card insert/eject */
 419         mmc_detect_int = detect_int;
 420         init_timer(&mmc_timer);
 421         mmc_timer.data = (unsigned long) data;
 422         return request_irq(LUBBOCK_SD_IRQ, lubbock_detect_int,
 423                         IRQF_SAMPLE_RANDOM, "lubbock-sd-detect", data);
 424 }
 425
 426 static int lubbock_mci_get_ro(struct device *dev)
 427 {
 428         return (LUB_MISC_RD & (1 << 2)) != 0;
 429 }
 430
 431 static void lubbock_mci_exit(struct device *dev, void *data)
 432 {
 433         free_irq(LUBBOCK_SD_IRQ, data);
 434         del_timer_sync(&mmc_timer);
 435 }
 436
 437 static struct pxamci_platform_data lubbock_mci_platform_data = {
 438         .ocr_mask       = MMC_VDD_32_33|MMC_VDD_33_34,
 439         .detect_delay   = 1,
 440         .init           = lubbock_mci_init,
 441         .get_ro         = lubbock_mci_get_ro,
 442         .exit           = lubbock_mci_exit,
 443 };
 444
 445 static void lubbock_irda_transceiver_mode(struct device *dev, int mode)
 446 {
 447         unsigned long flags;
 448
 449         local_irq_save(flags);
 450         if (mode & IR_SIRMODE) {
 451                 LUB_MISC_WR &= ~(1 << 4);
 452         } else if (mode & IR_FIRMODE) {
 453                 LUB_MISC_WR |= 1 << 4;
 454         }
 455         local_irq_restore(flags);
 456 }
 457
 458 static struct pxaficp_platform_data lubbock_ficp_platform_data = {
 459         .transceiver_cap  = IR_SIRMODE | IR_FIRMODE,
 460         .transceiver_mode = lubbock_irda_transceiver_mode,
 461 };
 462
 463 static void __init lubbock_init(void)
 464 {
 465         int flashboot = (LUB_CONF_SWITCHES & 1);
 466
 467         pxa_set_udc_info(&udc_info);
 468         set_pxa_fb_info(&sharp_lm8v31);
 469         pxa_set_mci_info(&lubbock_mci_platform_data);
 470         pxa_set_ficp_info(&lubbock_ficp_platform_data);
 471
 472         lubbock_flash_data[0].width = lubbock_flash_data[1].width =
 473                 (BOOT_DEF & 1) ? 2 : 4;
 474         /* Compensate for the nROMBT switch which swaps the flash banks */
 475         printk(KERN_NOTICE "Lubbock configured to boot from %s (bank %d)\n",
 476                flashboot?"Flash":"ROM", flashboot);
 477
 478         lubbock_flash_data[flashboot^1].name = "application-flash";
 479         lubbock_flash_data[flashboot].name = "boot-rom";
 480         (void) platform_add_devices(devices, ARRAY_SIZE(devices));
 481
 482         spi_register_board_info(spi_board_info, ARRAY_SIZE(spi_board_info));
 483 }
 484
 485 static struct map_desc lubbock_io_desc[] __initdata = {
 486         {       /* CPLD */
 487                 .virtual        =  LUBBOCK_FPGA_VIRT,
 488                 .pfn            = __phys_to_pfn(LUBBOCK_FPGA_PHYS),
 489                 .length         = 0x00100000,
 490                 .type           = MT_DEVICE
 491         }
 492 };
 493
 494 static void __init lubbock_map_io(void)
 495 {
 496         pxa_map_io();
 497         iotable_init(lubbock_io_desc, ARRAY_SIZE(lubbock_io_desc));
 498
 499         /* SSP data pins */
 500         pxa_gpio_mode(GPIO23_SCLK_MD);
 501         pxa_gpio_mode(GPIO25_STXD_MD);
 502         pxa_gpio_mode(GPIO26_SRXD_MD);
 503
 504         /* This enables the BTUART */
 505         pxa_gpio_mode(GPIO42_BTRXD_MD);
 506         pxa_gpio_mode(GPIO43_BTTXD_MD);
 507         pxa_gpio_mode(GPIO44_BTCTS_MD);
 508         pxa_gpio_mode(GPIO45_BTRTS_MD);
 509
 510         /* This is for the SMC chip select */
 511         pxa_gpio_mode(GPIO79_nCS_3_MD);
 512
 513         /* setup sleep mode values */
 514         PWER  = 0x00000002;
 515         PFER  = 0x00000000;
 516         PRER  = 0x00000002;
 517         PGSR0 = 0x00008000;
 518         PGSR1 = 0x003F0202;
 519         PGSR2 = 0x0001C000;
 520         PCFR |= PCFR_OPDE;
 521 }
 522
 523 MACHINE_START(LUBBOCK, "Intel DBPXA250 Development Platform (aka Lubbock)")
 524         /* Maintainer: MontaVista Software Inc. */
 525         .phys_io        = 0x40000000,
 526         .io_pg_offst    = (io_p2v(0x40000000) >> 18) & 0xfffc,
 527         .map_io         = lubbock_map_io,
 528         .init_irq       = lubbock_init_irq,
 529         .timer          = &pxa_timer,
 530         .init_machine   = lubbock_init,
 531 MACHINE_END