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/mfp-pxa25x.h>
  46 #include <asm/arch/audio.h>
  47 #include <asm/arch/lubbock.h>
  48 #include <asm/arch/udc.h>
  49 #include <asm/arch/irda.h>
  50 #include <asm/arch/pxafb.h>
  51 #include <asm/arch/mmc.h>
  52
  53 #include "generic.h"
  54 #include "devices.h"
  55
  56 static unsigned long lubbock_pin_config[] __initdata = {
  57         GPIO15_nCS_1,   /* CS1 - Flash */
  58         GPIO79_nCS_3,   /* CS3 - SMC ethernet */
  59
  60         /* SSP data pins */
  61         GPIO23_SSP1_SCLK,
  62         GPIO25_SSP1_TXD,
  63         GPIO26_SSP1_RXD,
  64
  65         /* BTUART */
  66         GPIO42_BTUART_RXD,
  67         GPIO43_BTUART_TXD,
  68         GPIO44_BTUART_CTS,
  69         GPIO45_BTUART_RTS,
  70
  71         /* PC Card */
  72         GPIO48_nPOE,
  73         GPIO49_nPWE,
  74         GPIO50_nPIOR,
  75         GPIO51_nPIOW,
  76         GPIO52_nPCE_1,
  77         GPIO53_nPCE_2,
  78         GPIO54_nPSKTSEL,
  79         GPIO55_nPREG,
  80         GPIO56_nPWAIT,
  81         GPIO57_nIOIS16,
  82
  83         /* MMC */
  84         GPIO6_MMC_CLK,
  85         GPIO8_MMC_CS0,
  86
  87         /* wakeup */
  88         GPIO1_GPIO | WAKEUP_ON_EDGE_RISE,
  89 };
  90
  91 #define LUB_MISC_WR             __LUB_REG(LUBBOCK_FPGA_PHYS + 0x080)
  92
  93 void lubbock_set_misc_wr(unsigned int mask, unsigned int set)
  94 {
  95         unsigned long flags;
  96
  97         local_irq_save(flags);
  98         LUB_MISC_WR = (LUB_MISC_WR & ~mask) | (set & mask);
  99         local_irq_restore(flags);
 100 }
 101 EXPORT_SYMBOL(lubbock_set_misc_wr);
 102
 103 static unsigned long lubbock_irq_enabled;
 104
 105 static void lubbock_mask_irq(unsigned int irq)
 106 {
 107         int lubbock_irq = (irq - LUBBOCK_IRQ(0));
 108         LUB_IRQ_MASK_EN = (lubbock_irq_enabled &= ~(1 << lubbock_irq));
 109 }
 110
 111 static void lubbock_unmask_irq(unsigned int irq)
 112 {
 113         int lubbock_irq = (irq - LUBBOCK_IRQ(0));
 114         /* the irq can be acknowledged only if deasserted, so it's done here */
 115         LUB_IRQ_SET_CLR &= ~(1 << lubbock_irq);
 116         LUB_IRQ_MASK_EN = (lubbock_irq_enabled |= (1 << lubbock_irq));
 117 }
 118
 119 static struct irq_chip lubbock_irq_chip = {
 120         .name           = "FPGA",
 121         .ack            = lubbock_mask_irq,
 122         .mask           = lubbock_mask_irq,
 123         .unmask         = lubbock_unmask_irq,
 124 };
 125
 126 static void lubbock_irq_handler(unsigned int irq, struct irq_desc *desc)
 127 {
 128         unsigned long pending = LUB_IRQ_SET_CLR & lubbock_irq_enabled;
 129         do {
 130                 GEDR(0) = GPIO_bit(0);  /* clear our parent irq */
 131                 if (likely(pending)) {
 132                         irq = LUBBOCK_IRQ(0) + __ffs(pending);
 133                         desc = irq_desc + irq;
 134                         desc_handle_irq(irq, desc);
 135                 }
 136                 pending = LUB_IRQ_SET_CLR & lubbock_irq_enabled;
 137         } while (pending);
 138 }
 139
 140 static void __init lubbock_init_irq(void)
 141 {
 142         int irq;
 143
 144         pxa25x_init_irq();
 145
 146         /* setup extra lubbock irqs */
 147         for (irq = LUBBOCK_IRQ(0); irq <= LUBBOCK_LAST_IRQ; irq++) {
 148                 set_irq_chip(irq, &lubbock_irq_chip);
 149                 set_irq_handler(irq, handle_level_irq);
 150                 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
 151         }
 152
 153         set_irq_chained_handler(IRQ_GPIO(0), lubbock_irq_handler);
 154         set_irq_type(IRQ_GPIO(0), IRQT_FALLING);
 155 }
 156
 157 #ifdef CONFIG_PM
 158
 159 static int lubbock_irq_resume(struct sys_device *dev)
 160 {
 161         LUB_IRQ_MASK_EN = lubbock_irq_enabled;
 162         return 0;
 163 }
 164
 165 static struct sysdev_class lubbock_irq_sysclass = {
 166         .name = "cpld_irq",
 167         .resume = lubbock_irq_resume,
 168 };
 169
 170 static struct sys_device lubbock_irq_device = {
 171         .cls = &lubbock_irq_sysclass,
 172 };
 173
 174 static int __init lubbock_irq_device_init(void)
 175 {
 176         int ret = -ENODEV;
 177
 178         if (machine_is_lubbock()) {
 179                 ret = sysdev_class_register(&lubbock_irq_sysclass);
 180                 if (ret == 0)
 181                         ret = sysdev_register(&lubbock_irq_device);
 182         }
 183         return ret;
 184 }
 185
 186 device_initcall(lubbock_irq_device_init);
 187
 188 #endif
 189
 190 static int lubbock_udc_is_connected(void)
 191 {
 192         return (LUB_MISC_RD & (1 << 9)) == 0;
 193 }
 194
 195 static struct pxa2xx_udc_mach_info udc_info __initdata = {
 196         .udc_is_connected       = lubbock_udc_is_connected,
 197         // no D+ pullup; lubbock can't connect/disconnect in software
 198 };
 199
 200 static struct resource sa1111_resources[] = {
 201         [0] = {
 202                 .start  = 0x10000000,
 203                 .end    = 0x10001fff,
 204                 .flags  = IORESOURCE_MEM,
 205         },
 206         [1] = {
 207                 .start  = LUBBOCK_SA1111_IRQ,
 208                 .end    = LUBBOCK_SA1111_IRQ,
 209                 .flags  = IORESOURCE_IRQ,
 210         },
 211 };
 212
 213 static struct platform_device sa1111_device = {
 214         .name           = "sa1111",
 215         .id             = -1,
 216         .num_resources  = ARRAY_SIZE(sa1111_resources),
 217         .resource       = sa1111_resources,
 218 };
 219
 220 /* ADS7846 is connected through SSP ... and if your board has J5 populated,
 221  * you can select it to replace the ucb1400 by switching the touchscreen cable
 222  * (to J5) and poking board registers (as done below).  Else it's only useful
 223  * for the temperature sensors.
 224  */
 225 static struct pxa2xx_spi_master pxa_ssp_master_info = {
 226         .num_chipselect = 0,
 227 };
 228
 229 static struct platform_device pxa_ssp = {
 230         .name           = "pxa2xx-spi",
 231         .id             = 1,
 232         .dev = {
 233                 .platform_data  = &pxa_ssp_master_info,
 234         },
 235 };
 236
 237 static int lubbock_ads7846_pendown_state(void)
 238 {
 239         /* TS_BUSY is bit 8 in LUB_MISC_RD, but pendown is irq-only */
 240         return 0;
 241 }
 242
 243 static struct ads7846_platform_data ads_info = {
 244         .model                  = 7846,
 245         .vref_delay_usecs       = 100,          /* internal, no cap */
 246         .get_pendown_state      = lubbock_ads7846_pendown_state,
 247         // .x_plate_ohms                = 500,  /* GUESS! */
 248         // .y_plate_ohms                = 500,  /* GUESS! */
 249 };
 250
 251 static void ads7846_cs(u32 command)
 252 {
 253         static const unsigned   TS_nCS = 1 << 11;
 254         lubbock_set_misc_wr(TS_nCS, (command == PXA2XX_CS_ASSERT) ? 0 : TS_nCS);
 255 }
 256
 257 static struct pxa2xx_spi_chip ads_hw = {
 258         .tx_threshold           = 1,
 259         .rx_threshold           = 2,
 260         .cs_control             = ads7846_cs,
 261 };
 262
 263 static struct spi_board_info spi_board_info[] __initdata = { {
 264         .modalias       = "ads7846",
 265         .platform_data  = &ads_info,
 266         .controller_data = &ads_hw,
 267         .irq            = LUBBOCK_BB_IRQ,
 268         .max_speed_hz   = 120000 /* max sample rate at 3V */
 269                                 * 26 /* command + data + overhead */,
 270         .bus_num        = 1,
 271         .chip_select    = 0,
 272 },
 273 };
 274
 275 static struct resource smc91x_resources[] = {
 276         [0] = {
 277                 .name   = "smc91x-regs",
 278                 .start  = 0x0c000c00,
 279                 .end    = 0x0c0fffff,
 280                 .flags  = IORESOURCE_MEM,
 281         },
 282         [1] = {
 283                 .start  = LUBBOCK_ETH_IRQ,
 284                 .end    = LUBBOCK_ETH_IRQ,
 285                 .flags  = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
 286         },
 287         [2] = {
 288                 .name   = "smc91x-attrib",
 289                 .start  = 0x0e000000,
 290                 .end    = 0x0e0fffff,
 291                 .flags  = IORESOURCE_MEM,
 292         },
 293 };
 294
 295 static struct platform_device smc91x_device = {
 296         .name           = "smc91x",
 297         .id             = -1,
 298         .num_resources  = ARRAY_SIZE(smc91x_resources),
 299         .resource       = smc91x_resources,
 300 };
 301
 302 static struct resource flash_resources[] = {
 303         [0] = {
 304                 .start  = 0x00000000,
 305                 .end    = SZ_64M - 1,
 306                 .flags  = IORESOURCE_MEM,
 307         },
 308         [1] = {
 309                 .start  = 0x04000000,
 310                 .end    = 0x04000000 + SZ_64M - 1,
 311                 .flags  = IORESOURCE_MEM,
 312         },
 313 };
 314
 315 static struct mtd_partition lubbock_partitions[] = {
 316         {
 317                 .name =         "Bootloader",
 318                 .size =         0x00040000,
 319                 .offset =       0,
 320                 .mask_flags =   MTD_WRITEABLE  /* force read-only */
 321         },{
 322                 .name =         "Kernel",
 323                 .size =         0x00100000,
 324                 .offset =       0x00040000,
 325         },{
 326                 .name =         "Filesystem",
 327                 .size =         MTDPART_SIZ_FULL,
 328                 .offset =       0x00140000
 329         }
 330 };
 331
 332 static struct flash_platform_data lubbock_flash_data[2] = {
 333         {
 334                 .map_name       = "cfi_probe",
 335                 .parts          = lubbock_partitions,
 336                 .nr_parts       = ARRAY_SIZE(lubbock_partitions),
 337         }, {
 338                 .map_name       = "cfi_probe",
 339                 .parts          = NULL,
 340                 .nr_parts       = 0,
 341         }
 342 };
 343
 344 static struct platform_device lubbock_flash_device[2] = {
 345         {
 346                 .name           = "pxa2xx-flash",
 347                 .id             = 0,
 348                 .dev = {
 349                         .platform_data = &lubbock_flash_data[0],
 350                 },
 351                 .resource = &flash_resources[0],
 352                 .num_resources = 1,
 353         },
 354         {
 355                 .name           = "pxa2xx-flash",
 356                 .id             = 1,
 357                 .dev = {
 358                         .platform_data = &lubbock_flash_data[1],
 359                 },
 360                 .resource = &flash_resources[1],
 361                 .num_resources = 1,
 362         },
 363 };
 364
 365 static struct platform_device *devices[] __initdata = {
 366         &sa1111_device,
 367         &smc91x_device,
 368         &lubbock_flash_device[0],
 369         &lubbock_flash_device[1],
 370         &pxa_ssp,
 371 };
 372
 373 static struct pxafb_mode_info sharp_lm8v31_mode = {
 374         .pixclock       = 270000,
 375         .xres           = 640,
 376         .yres           = 480,
 377         .bpp            = 16,
 378         .hsync_len      = 1,
 379         .left_margin    = 3,
 380         .right_margin   = 3,
 381         .vsync_len      = 1,
 382         .upper_margin   = 0,
 383         .lower_margin   = 0,
 384         .sync           = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 385         .cmap_greyscale = 0,
 386 };
 387
 388 static struct pxafb_mach_info sharp_lm8v31 = {
 389         .modes          = &sharp_lm8v31_mode,
 390         .num_modes      = 1,
 391         .cmap_inverse   = 0,
 392         .cmap_static    = 0,
 393         .lcd_conn       = LCD_COLOR_DSTN_16BPP | LCD_PCLK_EDGE_FALL |
 394                           LCD_AC_BIAS_FREQ(255),
 395 };
 396
 397 #define MMC_POLL_RATE           msecs_to_jiffies(1000)
 398
 399 static void lubbock_mmc_poll(unsigned long);
 400 static irq_handler_t mmc_detect_int;
 401
 402 static struct timer_list mmc_timer = {
 403         .function       = lubbock_mmc_poll,
 404 };
 405
 406 static void lubbock_mmc_poll(unsigned long data)
 407 {
 408         unsigned long flags;
 409
 410         /* clear any previous irq state, then ... */
 411         local_irq_save(flags);
 412         LUB_IRQ_SET_CLR &= ~(1 << 0);
 413         local_irq_restore(flags);
 414
 415         /* poll until mmc/sd card is removed */
 416         if (LUB_IRQ_SET_CLR & (1 << 0))
 417                 mod_timer(&mmc_timer, jiffies + MMC_POLL_RATE);
 418         else {
 419                 (void) mmc_detect_int(LUBBOCK_SD_IRQ, (void *)data);
 420                 enable_irq(LUBBOCK_SD_IRQ);
 421         }
 422 }
 423
 424 static irqreturn_t lubbock_detect_int(int irq, void *data)
 425 {
 426         /* IRQ is level triggered; disable, and poll for removal */
 427         disable_irq(irq);
 428         mod_timer(&mmc_timer, jiffies + MMC_POLL_RATE);
 429
 430         return mmc_detect_int(irq, data);
 431 }
 432
 433 static int lubbock_mci_init(struct device *dev,
 434                 irq_handler_t detect_int,
 435                 void *data)
 436 {
 437         /* detect card insert/eject */
 438         mmc_detect_int = detect_int;
 439         init_timer(&mmc_timer);
 440         mmc_timer.data = (unsigned long) data;
 441         return request_irq(LUBBOCK_SD_IRQ, lubbock_detect_int,
 442                         IRQF_SAMPLE_RANDOM, "lubbock-sd-detect", data);
 443 }
 444
 445 static int lubbock_mci_get_ro(struct device *dev)
 446 {
 447         return (LUB_MISC_RD & (1 << 2)) != 0;
 448 }
 449
 450 static void lubbock_mci_exit(struct device *dev, void *data)
 451 {
 452         free_irq(LUBBOCK_SD_IRQ, data);
 453         del_timer_sync(&mmc_timer);
 454 }
 455
 456 static struct pxamci_platform_data lubbock_mci_platform_data = {
 457         .ocr_mask       = MMC_VDD_32_33|MMC_VDD_33_34,
 458         .detect_delay   = 1,
 459         .init           = lubbock_mci_init,
 460         .get_ro         = lubbock_mci_get_ro,
 461         .exit           = lubbock_mci_exit,
 462 };
 463
 464 static void lubbock_irda_transceiver_mode(struct device *dev, int mode)
 465 {
 466         unsigned long flags;
 467
 468         local_irq_save(flags);
 469         if (mode & IR_SIRMODE) {
 470                 LUB_MISC_WR &= ~(1 << 4);
 471         } else if (mode & IR_FIRMODE) {
 472                 LUB_MISC_WR |= 1 << 4;
 473         }
 474         local_irq_restore(flags);
 475 }
 476
 477 static struct pxaficp_platform_data lubbock_ficp_platform_data = {
 478         .transceiver_cap  = IR_SIRMODE | IR_FIRMODE,
 479         .transceiver_mode = lubbock_irda_transceiver_mode,
 480 };
 481
 482 static void __init lubbock_init(void)
 483 {
 484         int flashboot = (LUB_CONF_SWITCHES & 1);
 485
 486         pxa2xx_mfp_config(ARRAY_AND_SIZE(lubbock_pin_config));
 487
 488         pxa_set_udc_info(&udc_info);
 489         set_pxa_fb_info(&sharp_lm8v31);
 490         pxa_set_mci_info(&lubbock_mci_platform_data);
 491         pxa_set_ficp_info(&lubbock_ficp_platform_data);
 492         pxa_set_ac97_info(NULL);
 493
 494         lubbock_flash_data[0].width = lubbock_flash_data[1].width =
 495                 (BOOT_DEF & 1) ? 2 : 4;
 496         /* Compensate for the nROMBT switch which swaps the flash banks */
 497         printk(KERN_NOTICE "Lubbock configured to boot from %s (bank %d)\n",
 498                flashboot?"Flash":"ROM", flashboot);
 499
 500         lubbock_flash_data[flashboot^1].name = "application-flash";
 501         lubbock_flash_data[flashboot].name = "boot-rom";
 502         (void) platform_add_devices(devices, ARRAY_SIZE(devices));
 503
 504         spi_register_board_info(spi_board_info, ARRAY_SIZE(spi_board_info));
 505 }
 506
 507 static struct map_desc lubbock_io_desc[] __initdata = {
 508         {       /* CPLD */
 509                 .virtual        =  LUBBOCK_FPGA_VIRT,
 510                 .pfn            = __phys_to_pfn(LUBBOCK_FPGA_PHYS),
 511                 .length         = 0x00100000,
 512                 .type           = MT_DEVICE
 513         }
 514 };
 515
 516 static void __init lubbock_map_io(void)
 517 {
 518         pxa_map_io();
 519         iotable_init(lubbock_io_desc, ARRAY_SIZE(lubbock_io_desc));
 520
 521         PCFR |= PCFR_OPDE;
 522 }
 523
 524 MACHINE_START(LUBBOCK, "Intel DBPXA250 Development Platform (aka Lubbock)")
 525         /* Maintainer: MontaVista Software Inc. */
 526         .phys_io        = 0x40000000,
 527         .io_pg_offst    = (io_p2v(0x40000000) >> 18) & 0xfffc,
 528         .map_io         = lubbock_map_io,
 529         .init_irq       = lubbock_init_irq,
 530         .timer          = &pxa_timer,
 531         .init_machine   = lubbock_init,
 532 MACHINE_END