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 #include <linux/smc91x.h>
  25
  26 #include <linux/spi/spi.h>
  27 #include <linux/spi/ads7846.h>
  28 #include <asm/arch/pxa2xx_spi.h>
  29
  30 #include <asm/setup.h>
  31 #include <asm/memory.h>
  32 #include <asm/mach-types.h>
  33 #include <asm/hardware.h>
  34 #include <asm/irq.h>
  35 #include <asm/sizes.h>
  36
  37 #include <asm/mach/arch.h>
  38 #include <asm/mach/map.h>
  39 #include <asm/mach/irq.h>
  40 #include <asm/mach/flash.h>
  41
  42 #include <asm/hardware/sa1111.h>
  43
  44 #include <asm/arch/pxa-regs.h>
  45 #include <asm/arch/pxa2xx-regs.h>
  46 #include <asm/arch/mfp-pxa25x.h>
  47 #include <asm/arch/audio.h>
  48 #include <asm/arch/lubbock.h>
  49 #include <asm/arch/udc.h>
  50 #include <asm/arch/irda.h>
  51 #include <asm/arch/pxafb.h>
  52 #include <asm/arch/mmc.h>
  53
  54 #include "generic.h"
  55 #include "devices.h"
  56
  57 static unsigned long lubbock_pin_config[] __initdata = {
  58         GPIO15_nCS_1,   /* CS1 - Flash */
  59         GPIO79_nCS_3,   /* CS3 - SMC ethernet */
  60
  61         /* SSP data pins */
  62         GPIO23_SSP1_SCLK,
  63         GPIO25_SSP1_TXD,
  64         GPIO26_SSP1_RXD,
  65
  66         /* BTUART */
  67         GPIO42_BTUART_RXD,
  68         GPIO43_BTUART_TXD,
  69         GPIO44_BTUART_CTS,
  70         GPIO45_BTUART_RTS,
  71
  72         /* PC Card */
  73         GPIO48_nPOE,
  74         GPIO49_nPWE,
  75         GPIO50_nPIOR,
  76         GPIO51_nPIOW,
  77         GPIO52_nPCE_1,
  78         GPIO53_nPCE_2,
  79         GPIO54_nPSKTSEL,
  80         GPIO55_nPREG,
  81         GPIO56_nPWAIT,
  82         GPIO57_nIOIS16,
  83
  84         /* MMC */
  85         GPIO6_MMC_CLK,
  86         GPIO8_MMC_CS0,
  87
  88         /* wakeup */
  89         GPIO1_GPIO | WAKEUP_ON_EDGE_RISE,
  90 };
  91
  92 #define LUB_MISC_WR             __LUB_REG(LUBBOCK_FPGA_PHYS + 0x080)
  93
  94 void lubbock_set_misc_wr(unsigned int mask, unsigned int set)
  95 {
  96         unsigned long flags;
  97
  98         local_irq_save(flags);
  99         LUB_MISC_WR = (LUB_MISC_WR & ~mask) | (set & mask);
 100         local_irq_restore(flags);
 101 }
 102 EXPORT_SYMBOL(lubbock_set_misc_wr);
 103
 104 static unsigned long lubbock_irq_enabled;
 105
 106 static void lubbock_mask_irq(unsigned int irq)
 107 {
 108         int lubbock_irq = (irq - LUBBOCK_IRQ(0));
 109         LUB_IRQ_MASK_EN = (lubbock_irq_enabled &= ~(1 << lubbock_irq));
 110 }
 111
 112 static void lubbock_unmask_irq(unsigned int irq)
 113 {
 114         int lubbock_irq = (irq - LUBBOCK_IRQ(0));
 115         /* the irq can be acknowledged only if deasserted, so it's done here */
 116         LUB_IRQ_SET_CLR &= ~(1 << lubbock_irq);
 117         LUB_IRQ_MASK_EN = (lubbock_irq_enabled |= (1 << lubbock_irq));
 118 }
 119
 120 static struct irq_chip lubbock_irq_chip = {
 121         .name           = "FPGA",
 122         .ack            = lubbock_mask_irq,
 123         .mask           = lubbock_mask_irq,
 124         .unmask         = lubbock_unmask_irq,
 125 };
 126
 127 static void lubbock_irq_handler(unsigned int irq, struct irq_desc *desc)
 128 {
 129         unsigned long pending = LUB_IRQ_SET_CLR & lubbock_irq_enabled;
 130         do {
 131                 GEDR(0) = GPIO_bit(0);  /* clear our parent irq */
 132                 if (likely(pending)) {
 133                         irq = LUBBOCK_IRQ(0) + __ffs(pending);
 134                         desc = irq_desc + irq;
 135                         desc_handle_irq(irq, desc);
 136                 }
 137                 pending = LUB_IRQ_SET_CLR & lubbock_irq_enabled;
 138         } while (pending);
 139 }
 140
 141 static void __init lubbock_init_irq(void)
 142 {
 143         int irq;
 144
 145         pxa25x_init_irq();
 146
 147         /* setup extra lubbock irqs */
 148         for (irq = LUBBOCK_IRQ(0); irq <= LUBBOCK_LAST_IRQ; irq++) {
 149                 set_irq_chip(irq, &lubbock_irq_chip);
 150                 set_irq_handler(irq, handle_level_irq);
 151                 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
 152         }
 153
 154         set_irq_chained_handler(IRQ_GPIO(0), lubbock_irq_handler);
 155         set_irq_type(IRQ_GPIO(0), IRQT_FALLING);
 156 }
 157
 158 #ifdef CONFIG_PM
 159
 160 static int lubbock_irq_resume(struct sys_device *dev)
 161 {
 162         LUB_IRQ_MASK_EN = lubbock_irq_enabled;
 163         return 0;
 164 }
 165
 166 static struct sysdev_class lubbock_irq_sysclass = {
 167         .name = "cpld_irq",
 168         .resume = lubbock_irq_resume,
 169 };
 170
 171 static struct sys_device lubbock_irq_device = {
 172         .cls = &lubbock_irq_sysclass,
 173 };
 174
 175 static int __init lubbock_irq_device_init(void)
 176 {
 177         int ret = -ENODEV;
 178
 179         if (machine_is_lubbock()) {
 180                 ret = sysdev_class_register(&lubbock_irq_sysclass);
 181                 if (ret == 0)
 182                         ret = sysdev_register(&lubbock_irq_device);
 183         }
 184         return ret;
 185 }
 186
 187 device_initcall(lubbock_irq_device_init);
 188
 189 #endif
 190
 191 static int lubbock_udc_is_connected(void)
 192 {
 193         return (LUB_MISC_RD & (1 << 9)) == 0;
 194 }
 195
 196 static struct pxa2xx_udc_mach_info udc_info __initdata = {
 197         .udc_is_connected       = lubbock_udc_is_connected,
 198         // no D+ pullup; lubbock can't connect/disconnect in software
 199 };
 200
 201 static struct resource sa1111_resources[] = {
 202         [0] = {
 203                 .start  = 0x10000000,
 204                 .end    = 0x10001fff,
 205                 .flags  = IORESOURCE_MEM,
 206         },
 207         [1] = {
 208                 .start  = LUBBOCK_SA1111_IRQ,
 209                 .end    = LUBBOCK_SA1111_IRQ,
 210                 .flags  = IORESOURCE_IRQ,
 211         },
 212 };
 213
 214 static struct platform_device sa1111_device = {
 215         .name           = "sa1111",
 216         .id             = -1,
 217         .num_resources  = ARRAY_SIZE(sa1111_resources),
 218         .resource       = sa1111_resources,
 219 };
 220
 221 /* ADS7846 is connected through SSP ... and if your board has J5 populated,
 222  * you can select it to replace the ucb1400 by switching the touchscreen cable
 223  * (to J5) and poking board registers (as done below).  Else it's only useful
 224  * for the temperature sensors.
 225  */
 226 static struct pxa2xx_spi_master pxa_ssp_master_info = {
 227         .num_chipselect = 0,
 228 };
 229
 230 static int lubbock_ads7846_pendown_state(void)
 231 {
 232         /* TS_BUSY is bit 8 in LUB_MISC_RD, but pendown is irq-only */
 233         return 0;
 234 }
 235
 236 static struct ads7846_platform_data ads_info = {
 237         .model                  = 7846,
 238         .vref_delay_usecs       = 100,          /* internal, no cap */
 239         .get_pendown_state      = lubbock_ads7846_pendown_state,
 240         // .x_plate_ohms                = 500,  /* GUESS! */
 241         // .y_plate_ohms                = 500,  /* GUESS! */
 242 };
 243
 244 static void ads7846_cs(u32 command)
 245 {
 246         static const unsigned   TS_nCS = 1 << 11;
 247         lubbock_set_misc_wr(TS_nCS, (command == PXA2XX_CS_ASSERT) ? 0 : TS_nCS);
 248 }
 249
 250 static struct pxa2xx_spi_chip ads_hw = {
 251         .tx_threshold           = 1,
 252         .rx_threshold           = 2,
 253         .cs_control             = ads7846_cs,
 254 };
 255
 256 static struct spi_board_info spi_board_info[] __initdata = { {
 257         .modalias       = "ads7846",
 258         .platform_data  = &ads_info,
 259         .controller_data = &ads_hw,
 260         .irq            = LUBBOCK_BB_IRQ,
 261         .max_speed_hz   = 120000 /* max sample rate at 3V */
 262                                 * 26 /* command + data + overhead */,
 263         .bus_num        = 1,
 264         .chip_select    = 0,
 265 },
 266 };
 267
 268 static struct resource smc91x_resources[] = {
 269         [0] = {
 270                 .name   = "smc91x-regs",
 271                 .start  = 0x0c000c00,
 272                 .end    = 0x0c0fffff,
 273                 .flags  = IORESOURCE_MEM,
 274         },
 275         [1] = {
 276                 .start  = LUBBOCK_ETH_IRQ,
 277                 .end    = LUBBOCK_ETH_IRQ,
 278                 .flags  = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
 279         },
 280         [2] = {
 281                 .name   = "smc91x-attrib",
 282                 .start  = 0x0e000000,
 283                 .end    = 0x0e0fffff,
 284                 .flags  = IORESOURCE_MEM,
 285         },
 286 };
 287
 288 static struct smc91x_platdata lubbock_smc91x_info = {
 289         .flags  = SMC91X_USE_16BIT | SMC91X_NOWAIT | SMC91X_IO_SHIFT_2,
 290 };
 291
 292 static struct platform_device smc91x_device = {
 293         .name           = "smc91x",
 294         .id             = -1,
 295         .num_resources  = ARRAY_SIZE(smc91x_resources),
 296         .resource       = smc91x_resources,
 297         .dev            = {
 298                 .platform_data = &lubbock_smc91x_info,
 299         },
 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 };
 371
 372 static struct pxafb_mode_info sharp_lm8v31_mode = {
 373         .pixclock       = 270000,
 374         .xres           = 640,
 375         .yres           = 480,
 376         .bpp            = 16,
 377         .hsync_len      = 1,
 378         .left_margin    = 3,
 379         .right_margin   = 3,
 380         .vsync_len      = 1,
 381         .upper_margin   = 0,
 382         .lower_margin   = 0,
 383         .sync           = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 384         .cmap_greyscale = 0,
 385 };
 386
 387 static struct pxafb_mach_info sharp_lm8v31 = {
 388         .modes          = &sharp_lm8v31_mode,
 389         .num_modes      = 1,
 390         .cmap_inverse   = 0,
 391         .cmap_static    = 0,
 392         .lcd_conn       = LCD_COLOR_DSTN_16BPP | LCD_PCLK_EDGE_FALL |
 393                           LCD_AC_BIAS_FREQ(255),
 394 };
 395
 396 #define MMC_POLL_RATE           msecs_to_jiffies(1000)
 397
 398 static void lubbock_mmc_poll(unsigned long);
 399 static irq_handler_t mmc_detect_int;
 400
 401 static struct timer_list mmc_timer = {
 402         .function       = lubbock_mmc_poll,
 403 };
 404
 405 static void lubbock_mmc_poll(unsigned long data)
 406 {
 407         unsigned long flags;
 408
 409         /* clear any previous irq state, then ... */
 410         local_irq_save(flags);
 411         LUB_IRQ_SET_CLR &= ~(1 << 0);
 412         local_irq_restore(flags);
 413
 414         /* poll until mmc/sd card is removed */
 415         if (LUB_IRQ_SET_CLR & (1 << 0))
 416                 mod_timer(&mmc_timer, jiffies + MMC_POLL_RATE);
 417         else {
 418                 (void) mmc_detect_int(LUBBOCK_SD_IRQ, (void *)data);
 419                 enable_irq(LUBBOCK_SD_IRQ);
 420         }
 421 }
 422
 423 static irqreturn_t lubbock_detect_int(int irq, void *data)
 424 {
 425         /* IRQ is level triggered; disable, and poll for removal */
 426         disable_irq(irq);
 427         mod_timer(&mmc_timer, jiffies + MMC_POLL_RATE);
 428
 429         return mmc_detect_int(irq, data);
 430 }
 431
 432 static int lubbock_mci_init(struct device *dev,
 433                 irq_handler_t detect_int,
 434                 void *data)
 435 {
 436         /* detect card insert/eject */
 437         mmc_detect_int = detect_int;
 438         init_timer(&mmc_timer);
 439         mmc_timer.data = (unsigned long) data;
 440         return request_irq(LUBBOCK_SD_IRQ, lubbock_detect_int,
 441                         IRQF_SAMPLE_RANDOM, "lubbock-sd-detect", data);
 442 }
 443
 444 static int lubbock_mci_get_ro(struct device *dev)
 445 {
 446         return (LUB_MISC_RD & (1 << 2)) != 0;
 447 }
 448
 449 static void lubbock_mci_exit(struct device *dev, void *data)
 450 {
 451         free_irq(LUBBOCK_SD_IRQ, data);
 452         del_timer_sync(&mmc_timer);
 453 }
 454
 455 static struct pxamci_platform_data lubbock_mci_platform_data = {
 456         .ocr_mask       = MMC_VDD_32_33|MMC_VDD_33_34,
 457         .detect_delay   = 1,
 458         .init           = lubbock_mci_init,
 459         .get_ro         = lubbock_mci_get_ro,
 460         .exit           = lubbock_mci_exit,
 461 };
 462
 463 static void lubbock_irda_transceiver_mode(struct device *dev, int mode)
 464 {
 465         unsigned long flags;
 466
 467         local_irq_save(flags);
 468         if (mode & IR_SIRMODE) {
 469                 LUB_MISC_WR &= ~(1 << 4);
 470         } else if (mode & IR_FIRMODE) {
 471                 LUB_MISC_WR |= 1 << 4;
 472         }
 473         pxa2xx_transceiver_mode(dev, mode);
 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         pxa2xx_set_spi_info(1, &pxa_ssp_master_info);
 505         spi_register_board_info(spi_board_info, ARRAY_SIZE(spi_board_info));
 506 }
 507
 508 static struct map_desc lubbock_io_desc[] __initdata = {
 509         {       /* CPLD */
 510                 .virtual        =  LUBBOCK_FPGA_VIRT,
 511                 .pfn            = __phys_to_pfn(LUBBOCK_FPGA_PHYS),
 512                 .length         = 0x00100000,
 513                 .type           = MT_DEVICE
 514         }
 515 };
 516
 517 static void __init lubbock_map_io(void)
 518 {
 519         pxa_map_io();
 520         iotable_init(lubbock_io_desc, ARRAY_SIZE(lubbock_io_desc));
 521
 522         PCFR |= PCFR_OPDE;
 523 }
 524
 525 MACHINE_START(LUBBOCK, "Intel DBPXA250 Development Platform (aka Lubbock)")
 526         /* Maintainer: MontaVista Software Inc. */
 527         .phys_io        = 0x40000000,
 528         .io_pg_offst    = (io_p2v(0x40000000) >> 18) & 0xfffc,
 529         .map_io         = lubbock_map_io,
 530         .init_irq       = lubbock_init_irq,
 531         .timer          = &pxa_timer,
 532         .init_machine   = lubbock_init,
 533 MACHINE_END