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 <mach/pxa2xx_spi.h>
  29
  30 #include <asm/setup.h>
  31 #include <asm/memory.h>
  32 #include <asm/mach-types.h>
  33 #include <mach/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 <mach/pxa-regs.h>
  45 #include <mach/pxa2xx-regs.h>
  46 #include <mach/mfp-pxa25x.h>
  47 #include <mach/audio.h>
  48 #include <mach/lubbock.h>
  49 #include <mach/udc.h>
  50 #include <mach/irda.h>
  51 #include <mach/pxafb.h>
  52 #include <mach/mmc.h>
  53
  54 #include "generic.h"
  55 #include "clock.h"
  56 #include "devices.h"
  57
  58 static unsigned long lubbock_pin_config[] __initdata = {
  59         GPIO15_nCS_1,   /* CS1 - Flash */
  60         GPIO78_nCS_2,   /* CS2 - Baseboard FGPA */
  61         GPIO79_nCS_3,   /* CS3 - SMC ethernet */
  62         GPIO80_nCS_4,   /* CS4 - SA1111 */
  63
  64         /* SSP data pins */
  65         GPIO23_SSP1_SCLK,
  66         GPIO25_SSP1_TXD,
  67         GPIO26_SSP1_RXD,
  68
  69         /* LCD - 16bpp DSTN */
  70         GPIO58_LCD_LDD_0,
  71         GPIO59_LCD_LDD_1,
  72         GPIO60_LCD_LDD_2,
  73         GPIO61_LCD_LDD_3,
  74         GPIO62_LCD_LDD_4,
  75         GPIO63_LCD_LDD_5,
  76         GPIO64_LCD_LDD_6,
  77         GPIO65_LCD_LDD_7,
  78         GPIO66_LCD_LDD_8,
  79         GPIO67_LCD_LDD_9,
  80         GPIO68_LCD_LDD_10,
  81         GPIO69_LCD_LDD_11,
  82         GPIO70_LCD_LDD_12,
  83         GPIO71_LCD_LDD_13,
  84         GPIO72_LCD_LDD_14,
  85         GPIO73_LCD_LDD_15,
  86         GPIO74_LCD_FCLK,
  87         GPIO75_LCD_LCLK,
  88         GPIO76_LCD_PCLK,
  89
  90         /* BTUART */
  91         GPIO42_BTUART_RXD,
  92         GPIO43_BTUART_TXD,
  93         GPIO44_BTUART_CTS,
  94         GPIO45_BTUART_RTS,
  95
  96         /* PC Card */
  97         GPIO48_nPOE,
  98         GPIO49_nPWE,
  99         GPIO50_nPIOR,
 100         GPIO51_nPIOW,
 101         GPIO52_nPCE_1,
 102         GPIO53_nPCE_2,
 103         GPIO54_nPSKTSEL,
 104         GPIO55_nPREG,
 105         GPIO56_nPWAIT,
 106         GPIO57_nIOIS16,
 107
 108         /* MMC */
 109         GPIO6_MMC_CLK,
 110         GPIO8_MMC_CS0,
 111
 112         /* wakeup */
 113         GPIO1_GPIO | WAKEUP_ON_EDGE_RISE,
 114 };
 115
 116 #define LUB_MISC_WR             __LUB_REG(LUBBOCK_FPGA_PHYS + 0x080)
 117
 118 void lubbock_set_misc_wr(unsigned int mask, unsigned int set)
 119 {
 120         unsigned long flags;
 121
 122         local_irq_save(flags);
 123         LUB_MISC_WR = (LUB_MISC_WR & ~mask) | (set & mask);
 124         local_irq_restore(flags);
 125 }
 126 EXPORT_SYMBOL(lubbock_set_misc_wr);
 127
 128 static unsigned long lubbock_irq_enabled;
 129
 130 static void lubbock_mask_irq(unsigned int irq)
 131 {
 132         int lubbock_irq = (irq - LUBBOCK_IRQ(0));
 133         LUB_IRQ_MASK_EN = (lubbock_irq_enabled &= ~(1 << lubbock_irq));
 134 }
 135
 136 static void lubbock_unmask_irq(unsigned int irq)
 137 {
 138         int lubbock_irq = (irq - LUBBOCK_IRQ(0));
 139         /* the irq can be acknowledged only if deasserted, so it's done here */
 140         LUB_IRQ_SET_CLR &= ~(1 << lubbock_irq);
 141         LUB_IRQ_MASK_EN = (lubbock_irq_enabled |= (1 << lubbock_irq));
 142 }
 143
 144 static struct irq_chip lubbock_irq_chip = {
 145         .name           = "FPGA",
 146         .ack            = lubbock_mask_irq,
 147         .mask           = lubbock_mask_irq,
 148         .unmask         = lubbock_unmask_irq,
 149 };
 150
 151 static void lubbock_irq_handler(unsigned int irq, struct irq_desc *desc)
 152 {
 153         unsigned long pending = LUB_IRQ_SET_CLR & lubbock_irq_enabled;
 154         do {
 155                 GEDR(0) = GPIO_bit(0);  /* clear our parent irq */
 156                 if (likely(pending)) {
 157                         irq = LUBBOCK_IRQ(0) + __ffs(pending);
 158                         generic_handle_irq(irq);
 159                 }
 160                 pending = LUB_IRQ_SET_CLR & lubbock_irq_enabled;
 161         } while (pending);
 162 }
 163
 164 static void __init lubbock_init_irq(void)
 165 {
 166         int irq;
 167
 168         pxa25x_init_irq();
 169
 170         /* setup extra lubbock irqs */
 171         for (irq = LUBBOCK_IRQ(0); irq <= LUBBOCK_LAST_IRQ; irq++) {
 172                 set_irq_chip(irq, &lubbock_irq_chip);
 173                 set_irq_handler(irq, handle_level_irq);
 174                 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
 175         }
 176
 177         set_irq_chained_handler(IRQ_GPIO(0), lubbock_irq_handler);
 178         set_irq_type(IRQ_GPIO(0), IRQ_TYPE_EDGE_FALLING);
 179 }
 180
 181 #ifdef CONFIG_PM
 182
 183 static int lubbock_irq_resume(struct sys_device *dev)
 184 {
 185         LUB_IRQ_MASK_EN = lubbock_irq_enabled;
 186         return 0;
 187 }
 188
 189 static struct sysdev_class lubbock_irq_sysclass = {
 190         .name = "cpld_irq",
 191         .resume = lubbock_irq_resume,
 192 };
 193
 194 static struct sys_device lubbock_irq_device = {
 195         .cls = &lubbock_irq_sysclass,
 196 };
 197
 198 static int __init lubbock_irq_device_init(void)
 199 {
 200         int ret = -ENODEV;
 201
 202         if (machine_is_lubbock()) {
 203                 ret = sysdev_class_register(&lubbock_irq_sysclass);
 204                 if (ret == 0)
 205                         ret = sysdev_register(&lubbock_irq_device);
 206         }
 207         return ret;
 208 }
 209
 210 device_initcall(lubbock_irq_device_init);
 211
 212 #endif
 213
 214 static int lubbock_udc_is_connected(void)
 215 {
 216         return (LUB_MISC_RD & (1 << 9)) == 0;
 217 }
 218
 219 static struct pxa2xx_udc_mach_info udc_info __initdata = {
 220         .udc_is_connected       = lubbock_udc_is_connected,
 221         // no D+ pullup; lubbock can't connect/disconnect in software
 222 };
 223
 224 static struct resource sa1111_resources[] = {
 225         [0] = {
 226                 .start  = 0x10000000,
 227                 .end    = 0x10001fff,
 228                 .flags  = IORESOURCE_MEM,
 229         },
 230         [1] = {
 231                 .start  = LUBBOCK_SA1111_IRQ,
 232                 .end    = LUBBOCK_SA1111_IRQ,
 233                 .flags  = IORESOURCE_IRQ,
 234         },
 235 };
 236
 237 static struct platform_device sa1111_device = {
 238         .name           = "sa1111",
 239         .id             = -1,
 240         .num_resources  = ARRAY_SIZE(sa1111_resources),
 241         .resource       = sa1111_resources,
 242 };
 243
 244 /* ADS7846 is connected through SSP ... and if your board has J5 populated,
 245  * you can select it to replace the ucb1400 by switching the touchscreen cable
 246  * (to J5) and poking board registers (as done below).  Else it's only useful
 247  * for the temperature sensors.
 248  */
 249 static struct pxa2xx_spi_master pxa_ssp_master_info = {
 250         .num_chipselect = 1,
 251 };
 252
 253 static int lubbock_ads7846_pendown_state(void)
 254 {
 255         /* TS_BUSY is bit 8 in LUB_MISC_RD, but pendown is irq-only */
 256         return 0;
 257 }
 258
 259 static struct ads7846_platform_data ads_info = {
 260         .model                  = 7846,
 261         .vref_delay_usecs       = 100,          /* internal, no cap */
 262         .get_pendown_state      = lubbock_ads7846_pendown_state,
 263         // .x_plate_ohms                = 500,  /* GUESS! */
 264         // .y_plate_ohms                = 500,  /* GUESS! */
 265 };
 266
 267 static void ads7846_cs(u32 command)
 268 {
 269         static const unsigned   TS_nCS = 1 << 11;
 270         lubbock_set_misc_wr(TS_nCS, (command == PXA2XX_CS_ASSERT) ? 0 : TS_nCS);
 271 }
 272
 273 static struct pxa2xx_spi_chip ads_hw = {
 274         .tx_threshold           = 1,
 275         .rx_threshold           = 2,
 276         .cs_control             = ads7846_cs,
 277 };
 278
 279 static struct spi_board_info spi_board_info[] __initdata = { {
 280         .modalias       = "ads7846",
 281         .platform_data  = &ads_info,
 282         .controller_data = &ads_hw,
 283         .irq            = LUBBOCK_BB_IRQ,
 284         .max_speed_hz   = 120000 /* max sample rate at 3V */
 285                                 * 26 /* command + data + overhead */,
 286         .bus_num        = 1,
 287         .chip_select    = 0,
 288 },
 289 };
 290
 291 static struct resource smc91x_resources[] = {
 292         [0] = {
 293                 .name   = "smc91x-regs",
 294                 .start  = 0x0c000c00,
 295                 .end    = 0x0c0fffff,
 296                 .flags  = IORESOURCE_MEM,
 297         },
 298         [1] = {
 299                 .start  = LUBBOCK_ETH_IRQ,
 300                 .end    = LUBBOCK_ETH_IRQ,
 301                 .flags  = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
 302         },
 303         [2] = {
 304                 .name   = "smc91x-attrib",
 305                 .start  = 0x0e000000,
 306                 .end    = 0x0e0fffff,
 307                 .flags  = IORESOURCE_MEM,
 308         },
 309 };
 310
 311 static struct smc91x_platdata lubbock_smc91x_info = {
 312         .flags  = SMC91X_USE_16BIT | SMC91X_NOWAIT | SMC91X_IO_SHIFT_2,
 313 };
 314
 315 static struct platform_device smc91x_device = {
 316         .name           = "smc91x",
 317         .id             = -1,
 318         .num_resources  = ARRAY_SIZE(smc91x_resources),
 319         .resource       = smc91x_resources,
 320         .dev            = {
 321                 .platform_data = &lubbock_smc91x_info,
 322         },
 323 };
 324
 325 static struct resource flash_resources[] = {
 326         [0] = {
 327                 .start  = 0x00000000,
 328                 .end    = SZ_64M - 1,
 329                 .flags  = IORESOURCE_MEM,
 330         },
 331         [1] = {
 332                 .start  = 0x04000000,
 333                 .end    = 0x04000000 + SZ_64M - 1,
 334                 .flags  = IORESOURCE_MEM,
 335         },
 336 };
 337
 338 static struct mtd_partition lubbock_partitions[] = {
 339         {
 340                 .name =         "Bootloader",
 341                 .size =         0x00040000,
 342                 .offset =       0,
 343                 .mask_flags =   MTD_WRITEABLE  /* force read-only */
 344         },{
 345                 .name =         "Kernel",
 346                 .size =         0x00100000,
 347                 .offset =       0x00040000,
 348         },{
 349                 .name =         "Filesystem",
 350                 .size =         MTDPART_SIZ_FULL,
 351                 .offset =       0x00140000
 352         }
 353 };
 354
 355 static struct flash_platform_data lubbock_flash_data[2] = {
 356         {
 357                 .map_name       = "cfi_probe",
 358                 .parts          = lubbock_partitions,
 359                 .nr_parts       = ARRAY_SIZE(lubbock_partitions),
 360         }, {
 361                 .map_name       = "cfi_probe",
 362                 .parts          = NULL,
 363                 .nr_parts       = 0,
 364         }
 365 };
 366
 367 static struct platform_device lubbock_flash_device[2] = {
 368         {
 369                 .name           = "pxa2xx-flash",
 370                 .id             = 0,
 371                 .dev = {
 372                         .platform_data = &lubbock_flash_data[0],
 373                 },
 374                 .resource = &flash_resources[0],
 375                 .num_resources = 1,
 376         },
 377         {
 378                 .name           = "pxa2xx-flash",
 379                 .id             = 1,
 380                 .dev = {
 381                         .platform_data = &lubbock_flash_data[1],
 382                 },
 383                 .resource = &flash_resources[1],
 384                 .num_resources = 1,
 385         },
 386 };
 387
 388 static struct platform_device *devices[] __initdata = {
 389         &sa1111_device,
 390         &smc91x_device,
 391         &lubbock_flash_device[0],
 392         &lubbock_flash_device[1],
 393 };
 394
 395 static struct pxafb_mode_info sharp_lm8v31_mode = {
 396         .pixclock       = 270000,
 397         .xres           = 640,
 398         .yres           = 480,
 399         .bpp            = 16,
 400         .hsync_len      = 1,
 401         .left_margin    = 3,
 402         .right_margin   = 3,
 403         .vsync_len      = 1,
 404         .upper_margin   = 0,
 405         .lower_margin   = 0,
 406         .sync           = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 407         .cmap_greyscale = 0,
 408 };
 409
 410 static struct pxafb_mach_info sharp_lm8v31 = {
 411         .modes          = &sharp_lm8v31_mode,
 412         .num_modes      = 1,
 413         .cmap_inverse   = 0,
 414         .cmap_static    = 0,
 415         .lcd_conn       = LCD_COLOR_DSTN_16BPP | LCD_PCLK_EDGE_FALL |
 416                           LCD_AC_BIAS_FREQ(255),
 417 };
 418
 419 #define MMC_POLL_RATE           msecs_to_jiffies(1000)
 420
 421 static void lubbock_mmc_poll(unsigned long);
 422 static irq_handler_t mmc_detect_int;
 423
 424 static struct timer_list mmc_timer = {
 425         .function       = lubbock_mmc_poll,
 426 };
 427
 428 static void lubbock_mmc_poll(unsigned long data)
 429 {
 430         unsigned long flags;
 431
 432         /* clear any previous irq state, then ... */
 433         local_irq_save(flags);
 434         LUB_IRQ_SET_CLR &= ~(1 << 0);
 435         local_irq_restore(flags);
 436
 437         /* poll until mmc/sd card is removed */
 438         if (LUB_IRQ_SET_CLR & (1 << 0))
 439                 mod_timer(&mmc_timer, jiffies + MMC_POLL_RATE);
 440         else {
 441                 (void) mmc_detect_int(LUBBOCK_SD_IRQ, (void *)data);
 442                 enable_irq(LUBBOCK_SD_IRQ);
 443         }
 444 }
 445
 446 static irqreturn_t lubbock_detect_int(int irq, void *data)
 447 {
 448         /* IRQ is level triggered; disable, and poll for removal */
 449         disable_irq(irq);
 450         mod_timer(&mmc_timer, jiffies + MMC_POLL_RATE);
 451
 452         return mmc_detect_int(irq, data);
 453 }
 454
 455 static int lubbock_mci_init(struct device *dev,
 456                 irq_handler_t detect_int,
 457                 void *data)
 458 {
 459         /* detect card insert/eject */
 460         mmc_detect_int = detect_int;
 461         init_timer(&mmc_timer);
 462         mmc_timer.data = (unsigned long) data;
 463         return request_irq(LUBBOCK_SD_IRQ, lubbock_detect_int,
 464                         IRQF_SAMPLE_RANDOM, "lubbock-sd-detect", data);
 465 }
 466
 467 static int lubbock_mci_get_ro(struct device *dev)
 468 {
 469         return (LUB_MISC_RD & (1 << 2)) != 0;
 470 }
 471
 472 static void lubbock_mci_exit(struct device *dev, void *data)
 473 {
 474         free_irq(LUBBOCK_SD_IRQ, data);
 475         del_timer_sync(&mmc_timer);
 476 }
 477
 478 static struct pxamci_platform_data lubbock_mci_platform_data = {
 479         .ocr_mask       = MMC_VDD_32_33|MMC_VDD_33_34,
 480         .detect_delay   = 1,
 481         .init           = lubbock_mci_init,
 482         .get_ro         = lubbock_mci_get_ro,
 483         .exit           = lubbock_mci_exit,
 484 };
 485
 486 static void lubbock_irda_transceiver_mode(struct device *dev, int mode)
 487 {
 488         unsigned long flags;
 489
 490         local_irq_save(flags);
 491         if (mode & IR_SIRMODE) {
 492                 LUB_MISC_WR &= ~(1 << 4);
 493         } else if (mode & IR_FIRMODE) {
 494                 LUB_MISC_WR |= 1 << 4;
 495         }
 496         pxa2xx_transceiver_mode(dev, mode);
 497         local_irq_restore(flags);
 498 }
 499
 500 static struct pxaficp_platform_data lubbock_ficp_platform_data = {
 501         .transceiver_cap  = IR_SIRMODE | IR_FIRMODE,
 502         .transceiver_mode = lubbock_irda_transceiver_mode,
 503 };
 504
 505 static void __init lubbock_init(void)
 506 {
 507         int flashboot = (LUB_CONF_SWITCHES & 1);
 508
 509         pxa2xx_mfp_config(ARRAY_AND_SIZE(lubbock_pin_config));
 510
 511         clk_add_alias("SA1111_CLK", NULL, "GPIO11_CLK", NULL);
 512         pxa_set_udc_info(&udc_info);
 513         set_pxa_fb_info(&sharp_lm8v31);
 514         pxa_set_mci_info(&lubbock_mci_platform_data);
 515         pxa_set_ficp_info(&lubbock_ficp_platform_data);
 516         pxa_set_ac97_info(NULL);
 517
 518         lubbock_flash_data[0].width = lubbock_flash_data[1].width =
 519                 (BOOT_DEF & 1) ? 2 : 4;
 520         /* Compensate for the nROMBT switch which swaps the flash banks */
 521         printk(KERN_NOTICE "Lubbock configured to boot from %s (bank %d)\n",
 522                flashboot?"Flash":"ROM", flashboot);
 523
 524         lubbock_flash_data[flashboot^1].name = "application-flash";
 525         lubbock_flash_data[flashboot].name = "boot-rom";
 526         (void) platform_add_devices(devices, ARRAY_SIZE(devices));
 527
 528         pxa2xx_set_spi_info(1, &pxa_ssp_master_info);
 529         spi_register_board_info(spi_board_info, ARRAY_SIZE(spi_board_info));
 530 }
 531
 532 static struct map_desc lubbock_io_desc[] __initdata = {
 533         {       /* CPLD */
 534                 .virtual        =  LUBBOCK_FPGA_VIRT,
 535                 .pfn            = __phys_to_pfn(LUBBOCK_FPGA_PHYS),
 536                 .length         = 0x00100000,
 537                 .type           = MT_DEVICE
 538         }
 539 };
 540
 541 static void __init lubbock_map_io(void)
 542 {
 543         pxa_map_io();
 544         iotable_init(lubbock_io_desc, ARRAY_SIZE(lubbock_io_desc));
 545
 546         PCFR |= PCFR_OPDE;
 547 }
 548
 549 MACHINE_START(LUBBOCK, "Intel DBPXA250 Development Platform (aka Lubbock)")
 550         /* Maintainer: MontaVista Software Inc. */
 551         .phys_io        = 0x40000000,
 552         .io_pg_offst    = (io_p2v(0x40000000) >> 18) & 0xfffc,
 553         .map_io         = lubbock_map_io,
 554         .init_irq       = lubbock_init_irq,
 555         .timer          = &pxa_timer,
 556         .init_machine   = lubbock_init,
 557 MACHINE_END