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