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