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