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/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 static unsigned long lubbock_pin_config[] __initdata = {
  56         GPIO15_nCS_1,   /* CS1 - Flash */
  57         GPIO79_nCS_3,   /* CS3 - SMC ethernet */
  58
  59         /* SSP data pins */
  60         GPIO23_SSP1_SCLK,
  61         GPIO25_SSP1_TXD,
  62         GPIO26_SSP1_RXD,
  63
  64         /* BTUART */
  65         GPIO42_BTUART_RXD,
  66         GPIO43_BTUART_TXD,
  67         GPIO44_BTUART_CTS,
  68         GPIO45_BTUART_RTS,
  69
  70         /* PC Card */
  71         GPIO48_nPOE,
  72         GPIO49_nPWE,
  73         GPIO50_nPIOR,
  74         GPIO51_nPIOW,
  75         GPIO52_nPCE_1,
  76         GPIO53_nPCE_2,
  77         GPIO54_nPSKTSEL,
  78         GPIO55_nPREG,
  79         GPIO56_nPWAIT,
  80         GPIO57_nIOIS16,
  81
  82         /* MMC */
  83         GPIO6_MMC_CLK,
  84         GPIO8_MMC_CS0,
  85
  86         /* wakeup */
  87         GPIO1_GPIO | WAKEUP_ON_EDGE_RISE,
  88 };
  89
  90 #define LUB_MISC_WR             __LUB_REG(LUBBOCK_FPGA_PHYS + 0x080)
  91
  92 void lubbock_set_misc_wr(unsigned int mask, unsigned int set)
  93 {
  94         unsigned long flags;
  95
  96         local_irq_save(flags);
  97         LUB_MISC_WR = (LUB_MISC_WR & ~mask) | (set & mask);
  98         local_irq_restore(flags);
  99 }
 100 EXPORT_SYMBOL(lubbock_set_misc_wr);
 101
 102 static unsigned long lubbock_irq_enabled;
 103
 104 static void lubbock_mask_irq(unsigned int irq)
 105 {
 106         int lubbock_irq = (irq - LUBBOCK_IRQ(0));
 107         LUB_IRQ_MASK_EN = (lubbock_irq_enabled &= ~(1 << lubbock_irq));
 108 }
 109
 110 static void lubbock_unmask_irq(unsigned int irq)
 111 {
 112         int lubbock_irq = (irq - LUBBOCK_IRQ(0));
 113         /* the irq can be acknowledged only if deasserted, so it's done here */
 114         LUB_IRQ_SET_CLR &= ~(1 << lubbock_irq);
 115         LUB_IRQ_MASK_EN = (lubbock_irq_enabled |= (1 << lubbock_irq));
 116 }
 117
 118 static struct irq_chip lubbock_irq_chip = {
 119         .name           = "FPGA",
 120         .ack            = lubbock_mask_irq,
 121         .mask           = lubbock_mask_irq,
 122         .unmask         = lubbock_unmask_irq,
 123 };
 124
 125 static void lubbock_irq_handler(unsigned int irq, struct irq_desc *desc)
 126 {
 127         unsigned long pending = LUB_IRQ_SET_CLR & lubbock_irq_enabled;
 128         do {
 129                 GEDR(0) = GPIO_bit(0);  /* clear our parent irq */
 130                 if (likely(pending)) {
 131                         irq = LUBBOCK_IRQ(0) + __ffs(pending);
 132                         desc = irq_desc + irq;
 133                         desc_handle_irq(irq, desc);
 134                 }
 135                 pending = LUB_IRQ_SET_CLR & lubbock_irq_enabled;
 136         } while (pending);
 137 }
 138
 139 static void __init lubbock_init_irq(void)
 140 {
 141         int irq;
 142
 143         pxa25x_init_irq();
 144
 145         /* setup extra lubbock irqs */
 146         for (irq = LUBBOCK_IRQ(0); irq <= LUBBOCK_LAST_IRQ; irq++) {
 147                 set_irq_chip(irq, &lubbock_irq_chip);
 148                 set_irq_handler(irq, handle_level_irq);
 149                 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
 150         }
 151
 152         set_irq_chained_handler(IRQ_GPIO(0), lubbock_irq_handler);
 153         set_irq_type(IRQ_GPIO(0), IRQT_FALLING);
 154 }
 155
 156 #ifdef CONFIG_PM
 157
 158 static int lubbock_irq_resume(struct sys_device *dev)
 159 {
 160         LUB_IRQ_MASK_EN = lubbock_irq_enabled;
 161         return 0;
 162 }
 163
 164 static struct sysdev_class lubbock_irq_sysclass = {
 165         .name = "cpld_irq",
 166         .resume = lubbock_irq_resume,
 167 };
 168
 169 static struct sys_device lubbock_irq_device = {
 170         .cls = &lubbock_irq_sysclass,
 171 };
 172
 173 static int __init lubbock_irq_device_init(void)
 174 {
 175         int ret = -ENODEV;
 176
 177         if (machine_is_lubbock()) {
 178                 ret = sysdev_class_register(&lubbock_irq_sysclass);
 179                 if (ret == 0)
 180                         ret = sysdev_register(&lubbock_irq_device);
 181         }
 182         return ret;
 183 }
 184
 185 device_initcall(lubbock_irq_device_init);
 186
 187 #endif
 188
 189 static int lubbock_udc_is_connected(void)
 190 {
 191         return (LUB_MISC_RD & (1 << 9)) == 0;
 192 }
 193
 194 static struct pxa2xx_udc_mach_info udc_info __initdata = {
 195         .udc_is_connected       = lubbock_udc_is_connected,
 196         // no D+ pullup; lubbock can't connect/disconnect in software
 197 };
 198
 199 static struct platform_device lub_audio_device = {
 200         .name           = "pxa2xx-ac97",
 201         .id             = -1,
 202 };
 203
 204 static struct resource sa1111_resources[] = {
 205         [0] = {
 206                 .start  = 0x10000000,
 207                 .end    = 0x10001fff,
 208                 .flags  = IORESOURCE_MEM,
 209         },
 210         [1] = {
 211                 .start  = LUBBOCK_SA1111_IRQ,
 212                 .end    = LUBBOCK_SA1111_IRQ,
 213                 .flags  = IORESOURCE_IRQ,
 214         },
 215 };
 216
 217 static struct platform_device sa1111_device = {
 218         .name           = "sa1111",
 219         .id             = -1,
 220         .num_resources  = ARRAY_SIZE(sa1111_resources),
 221         .resource       = sa1111_resources,
 222 };
 223
 224 /* ADS7846 is connected through SSP ... and if your board has J5 populated,
 225  * you can select it to replace the ucb1400 by switching the touchscreen cable
 226  * (to J5) and poking board registers (as done below).  Else it's only useful
 227  * for the temperature sensors.
 228  */
 229 static struct pxa2xx_spi_master pxa_ssp_master_info = {
 230         .num_chipselect = 0,
 231 };
 232
 233 static struct platform_device pxa_ssp = {
 234         .name           = "pxa2xx-spi",
 235         .id             = 1,
 236         .dev = {
 237                 .platform_data  = &pxa_ssp_master_info,
 238         },
 239 };
 240
 241 static int lubbock_ads7846_pendown_state(void)
 242 {
 243         /* TS_BUSY is bit 8 in LUB_MISC_RD, but pendown is irq-only */
 244         return 0;
 245 }
 246
 247 static struct ads7846_platform_data ads_info = {
 248         .model                  = 7846,
 249         .vref_delay_usecs       = 100,          /* internal, no cap */
 250         .get_pendown_state      = lubbock_ads7846_pendown_state,
 251         // .x_plate_ohms                = 500,  /* GUESS! */
 252         // .y_plate_ohms                = 500,  /* GUESS! */
 253 };
 254
 255 static void ads7846_cs(u32 command)
 256 {
 257         static const unsigned   TS_nCS = 1 << 11;
 258         lubbock_set_misc_wr(TS_nCS, (command == PXA2XX_CS_ASSERT) ? 0 : TS_nCS);
 259 }
 260
 261 static struct pxa2xx_spi_chip ads_hw = {
 262         .tx_threshold           = 1,
 263         .rx_threshold           = 2,
 264         .cs_control             = ads7846_cs,
 265 };
 266
 267 static struct spi_board_info spi_board_info[] __initdata = { {
 268         .modalias       = "ads7846",
 269         .platform_data  = &ads_info,
 270         .controller_data = &ads_hw,
 271         .irq            = LUBBOCK_BB_IRQ,
 272         .max_speed_hz   = 120000 /* max sample rate at 3V */
 273                                 * 26 /* command + data + overhead */,
 274         .bus_num        = 1,
 275         .chip_select    = 0,
 276 },
 277 };
 278
 279 static struct resource smc91x_resources[] = {
 280         [0] = {
 281                 .name   = "smc91x-regs",
 282                 .start  = 0x0c000c00,
 283                 .end    = 0x0c0fffff,
 284                 .flags  = IORESOURCE_MEM,
 285         },
 286         [1] = {
 287                 .start  = LUBBOCK_ETH_IRQ,
 288                 .end    = LUBBOCK_ETH_IRQ,
 289                 .flags  = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
 290         },
 291         [2] = {
 292                 .name   = "smc91x-attrib",
 293                 .start  = 0x0e000000,
 294                 .end    = 0x0e0fffff,
 295                 .flags  = IORESOURCE_MEM,
 296         },
 297 };
 298
 299 static struct platform_device smc91x_device = {
 300         .name           = "smc91x",
 301         .id             = -1,
 302         .num_resources  = ARRAY_SIZE(smc91x_resources),
 303         .resource       = smc91x_resources,
 304 };
 305
 306 static struct resource flash_resources[] = {
 307         [0] = {
 308                 .start  = 0x00000000,
 309                 .end    = SZ_64M - 1,
 310                 .flags  = IORESOURCE_MEM,
 311         },
 312         [1] = {
 313                 .start  = 0x04000000,
 314                 .end    = 0x04000000 + SZ_64M - 1,
 315                 .flags  = IORESOURCE_MEM,
 316         },
 317 };
 318
 319 static struct mtd_partition lubbock_partitions[] = {
 320         {
 321                 .name =         "Bootloader",
 322                 .size =         0x00040000,
 323                 .offset =       0,
 324                 .mask_flags =   MTD_WRITEABLE  /* force read-only */
 325         },{
 326                 .name =         "Kernel",
 327                 .size =         0x00100000,
 328                 .offset =       0x00040000,
 329         },{
 330                 .name =         "Filesystem",
 331                 .size =         MTDPART_SIZ_FULL,
 332                 .offset =       0x00140000
 333         }
 334 };
 335
 336 static struct flash_platform_data lubbock_flash_data[2] = {
 337         {
 338                 .map_name       = "cfi_probe",
 339                 .parts          = lubbock_partitions,
 340                 .nr_parts       = ARRAY_SIZE(lubbock_partitions),
 341         }, {
 342                 .map_name       = "cfi_probe",
 343                 .parts          = NULL,
 344                 .nr_parts       = 0,
 345         }
 346 };
 347
 348 static struct platform_device lubbock_flash_device[2] = {
 349         {
 350                 .name           = "pxa2xx-flash",
 351                 .id             = 0,
 352                 .dev = {
 353                         .platform_data = &lubbock_flash_data[0],
 354                 },
 355                 .resource = &flash_resources[0],
 356                 .num_resources = 1,
 357         },
 358         {
 359                 .name           = "pxa2xx-flash",
 360                 .id             = 1,
 361                 .dev = {
 362                         .platform_data = &lubbock_flash_data[1],
 363                 },
 364                 .resource = &flash_resources[1],
 365                 .num_resources = 1,
 366         },
 367 };
 368
 369 static struct platform_device *devices[] __initdata = {
 370         &sa1111_device,
 371         &lub_audio_device,
 372         &smc91x_device,
 373         &lubbock_flash_device[0],
 374         &lubbock_flash_device[1],
 375         &pxa_ssp,
 376 };
 377
 378 static struct pxafb_mode_info sharp_lm8v31_mode = {
 379         .pixclock       = 270000,
 380         .xres           = 640,
 381         .yres           = 480,
 382         .bpp            = 16,
 383         .hsync_len      = 1,
 384         .left_margin    = 3,
 385         .right_margin   = 3,
 386         .vsync_len      = 1,
 387         .upper_margin   = 0,
 388         .lower_margin   = 0,
 389         .sync           = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 390         .cmap_greyscale = 0,
 391 };
 392
 393 static struct pxafb_mach_info sharp_lm8v31 = {
 394         .modes          = &sharp_lm8v31_mode,
 395         .num_modes      = 1,
 396         .cmap_inverse   = 0,
 397         .cmap_static    = 0,
 398         .lcd_conn       = LCD_COLOR_DSTN_16BPP | LCD_PCLK_EDGE_FALL |
 399                           LCD_AC_BIAS_FREQ(255);
 400 };
 401
 402 #define MMC_POLL_RATE           msecs_to_jiffies(1000)
 403
 404 static void lubbock_mmc_poll(unsigned long);
 405 static irq_handler_t mmc_detect_int;
 406
 407 static struct timer_list mmc_timer = {
 408         .function       = lubbock_mmc_poll,
 409 };
 410
 411 static void lubbock_mmc_poll(unsigned long data)
 412 {
 413         unsigned long flags;
 414
 415         /* clear any previous irq state, then ... */
 416         local_irq_save(flags);
 417         LUB_IRQ_SET_CLR &= ~(1 << 0);
 418         local_irq_restore(flags);
 419
 420         /* poll until mmc/sd card is removed */
 421         if (LUB_IRQ_SET_CLR & (1 << 0))
 422                 mod_timer(&mmc_timer, jiffies + MMC_POLL_RATE);
 423         else {
 424                 (void) mmc_detect_int(LUBBOCK_SD_IRQ, (void *)data);
 425                 enable_irq(LUBBOCK_SD_IRQ);
 426         }
 427 }
 428
 429 static irqreturn_t lubbock_detect_int(int irq, void *data)
 430 {
 431         /* IRQ is level triggered; disable, and poll for removal */
 432         disable_irq(irq);
 433         mod_timer(&mmc_timer, jiffies + MMC_POLL_RATE);
 434
 435         return mmc_detect_int(irq, data);
 436 }
 437
 438 static int lubbock_mci_init(struct device *dev,
 439                 irq_handler_t detect_int,
 440                 void *data)
 441 {
 442         /* detect card insert/eject */
 443         mmc_detect_int = detect_int;
 444         init_timer(&mmc_timer);
 445         mmc_timer.data = (unsigned long) data;
 446         return request_irq(LUBBOCK_SD_IRQ, lubbock_detect_int,
 447                         IRQF_SAMPLE_RANDOM, "lubbock-sd-detect", data);
 448 }
 449
 450 static int lubbock_mci_get_ro(struct device *dev)
 451 {
 452         return (LUB_MISC_RD & (1 << 2)) != 0;
 453 }
 454
 455 static void lubbock_mci_exit(struct device *dev, void *data)
 456 {
 457         free_irq(LUBBOCK_SD_IRQ, data);
 458         del_timer_sync(&mmc_timer);
 459 }
 460
 461 static struct pxamci_platform_data lubbock_mci_platform_data = {
 462         .ocr_mask       = MMC_VDD_32_33|MMC_VDD_33_34,
 463         .detect_delay   = 1,
 464         .init           = lubbock_mci_init,
 465         .get_ro         = lubbock_mci_get_ro,
 466         .exit           = lubbock_mci_exit,
 467 };
 468
 469 static void lubbock_irda_transceiver_mode(struct device *dev, int mode)
 470 {
 471         unsigned long flags;
 472
 473         local_irq_save(flags);
 474         if (mode & IR_SIRMODE) {
 475                 LUB_MISC_WR &= ~(1 << 4);
 476         } else if (mode & IR_FIRMODE) {
 477                 LUB_MISC_WR |= 1 << 4;
 478         }
 479         local_irq_restore(flags);
 480 }
 481
 482 static struct pxaficp_platform_data lubbock_ficp_platform_data = {
 483         .transceiver_cap  = IR_SIRMODE | IR_FIRMODE,
 484         .transceiver_mode = lubbock_irda_transceiver_mode,
 485 };
 486
 487 static void __init lubbock_init(void)
 488 {
 489         int flashboot = (LUB_CONF_SWITCHES & 1);
 490
 491         pxa2xx_mfp_config(ARRAY_AND_SIZE(lubbock_pin_config));
 492
 493         pxa_set_udc_info(&udc_info);
 494         set_pxa_fb_info(&sharp_lm8v31);
 495         pxa_set_mci_info(&lubbock_mci_platform_data);
 496         pxa_set_ficp_info(&lubbock_ficp_platform_data);
 497
 498         lubbock_flash_data[0].width = lubbock_flash_data[1].width =
 499                 (BOOT_DEF & 1) ? 2 : 4;
 500         /* Compensate for the nROMBT switch which swaps the flash banks */
 501         printk(KERN_NOTICE "Lubbock configured to boot from %s (bank %d)\n",
 502                flashboot?"Flash":"ROM", flashboot);
 503
 504         lubbock_flash_data[flashboot^1].name = "application-flash";
 505         lubbock_flash_data[flashboot].name = "boot-rom";
 506         (void) platform_add_devices(devices, ARRAY_SIZE(devices));
 507
 508         spi_register_board_info(spi_board_info, ARRAY_SIZE(spi_board_info));
 509 }
 510
 511 static struct map_desc lubbock_io_desc[] __initdata = {
 512         {       /* CPLD */
 513                 .virtual        =  LUBBOCK_FPGA_VIRT,
 514                 .pfn            = __phys_to_pfn(LUBBOCK_FPGA_PHYS),
 515                 .length         = 0x00100000,
 516                 .type           = MT_DEVICE
 517         }
 518 };
 519
 520 static void __init lubbock_map_io(void)
 521 {
 522         pxa_map_io();
 523         iotable_init(lubbock_io_desc, ARRAY_SIZE(lubbock_io_desc));
 524
 525         PCFR |= PCFR_OPDE;
 526 }
 527
 528 MACHINE_START(LUBBOCK, "Intel DBPXA250 Development Platform (aka Lubbock)")
 529         /* Maintainer: MontaVista Software Inc. */
 530         .phys_io        = 0x40000000,
 531         .io_pg_offst    = (io_p2v(0x40000000) >> 18) & 0xfffc,
 532         .map_io         = lubbock_map_io,
 533         .init_irq       = lubbock_init_irq,
 534         .timer          = &pxa_timer,
 535         .init_machine   = lubbock_init,
 536 MACHINE_END