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/lubbock.h>
  45 #include <asm/arch/udc.h>
  46 #include <asm/arch/irda.h>
  47 #include <asm/arch/pxafb.h>
  48 #include <asm/arch/mmc.h>
  49
  50 #include "generic.h"
  51
  52
  53 #define LUB_MISC_WR             __LUB_REG(LUBBOCK_FPGA_PHYS + 0x080)
  54
  55 void lubbock_set_misc_wr(unsigned int mask, unsigned int set)
  56 {
  57         unsigned long flags;
  58
  59         local_irq_save(flags);
  60         LUB_MISC_WR = (LUB_MISC_WR & ~mask) | (set & mask);
  61         local_irq_restore(flags);
  62 }
  63 EXPORT_SYMBOL(lubbock_set_misc_wr);
  64
  65 static unsigned long lubbock_irq_enabled;
  66
  67 static void lubbock_mask_irq(unsigned int irq)
  68 {
  69         int lubbock_irq = (irq - LUBBOCK_IRQ(0));
  70         LUB_IRQ_MASK_EN = (lubbock_irq_enabled &= ~(1 << lubbock_irq));
  71 }
  72
  73 static void lubbock_unmask_irq(unsigned int irq)
  74 {
  75         int lubbock_irq = (irq - LUBBOCK_IRQ(0));
  76         /* the irq can be acknowledged only if deasserted, so it's done here */
  77         LUB_IRQ_SET_CLR &= ~(1 << lubbock_irq);
  78         LUB_IRQ_MASK_EN = (lubbock_irq_enabled |= (1 << lubbock_irq));
  79 }
  80
  81 static struct irqchip lubbock_irq_chip = {
  82         .ack            = lubbock_mask_irq,
  83         .mask           = lubbock_mask_irq,
  84         .unmask         = lubbock_unmask_irq,
  85 };
  86
  87 static void lubbock_irq_handler(unsigned int irq, struct irqdesc *desc,
  88                                 struct pt_regs *regs)
  89 {
  90         unsigned long pending = LUB_IRQ_SET_CLR & lubbock_irq_enabled;
  91         do {
  92                 GEDR(0) = GPIO_bit(0);  /* clear our parent irq */
  93                 if (likely(pending)) {
  94                         irq = LUBBOCK_IRQ(0) + __ffs(pending);
  95                         desc = irq_desc + irq;
  96                         desc_handle_irq(irq, desc, regs);
  97                 }
  98                 pending = LUB_IRQ_SET_CLR & lubbock_irq_enabled;
  99         } while (pending);
 100 }
 101
 102 static void __init lubbock_init_irq(void)
 103 {
 104         int irq;
 105
 106         pxa_init_irq();
 107
 108         /* setup extra lubbock irqs */
 109         for (irq = LUBBOCK_IRQ(0); irq <= LUBBOCK_LAST_IRQ; irq++) {
 110                 set_irq_chip(irq, &lubbock_irq_chip);
 111                 set_irq_handler(irq, do_level_IRQ);
 112                 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
 113         }
 114
 115         set_irq_chained_handler(IRQ_GPIO(0), lubbock_irq_handler);
 116         set_irq_type(IRQ_GPIO(0), IRQT_FALLING);
 117 }
 118
 119 #ifdef CONFIG_PM
 120
 121 static int lubbock_irq_resume(struct sys_device *dev)
 122 {
 123         LUB_IRQ_MASK_EN = lubbock_irq_enabled;
 124         return 0;
 125 }
 126
 127 static struct sysdev_class lubbock_irq_sysclass = {
 128         set_kset_name("cpld_irq"),
 129         .resume = lubbock_irq_resume,
 130 };
 131
 132 static struct sys_device lubbock_irq_device = {
 133         .cls = &lubbock_irq_sysclass,
 134 };
 135
 136 static int __init lubbock_irq_device_init(void)
 137 {
 138         int ret = sysdev_class_register(&lubbock_irq_sysclass);
 139         if (ret == 0)
 140                 ret = sysdev_register(&lubbock_irq_device);
 141         return ret;
 142 }
 143
 144 device_initcall(lubbock_irq_device_init);
 145
 146 #endif
 147
 148 static int lubbock_udc_is_connected(void)
 149 {
 150         return (LUB_MISC_RD & (1 << 9)) == 0;
 151 }
 152
 153 static struct pxa2xx_udc_mach_info udc_info __initdata = {
 154         .udc_is_connected       = lubbock_udc_is_connected,
 155         // no D+ pullup; lubbock can't connect/disconnect in software
 156 };
 157
 158 static struct platform_device lub_audio_device = {
 159         .name           = "pxa2xx-ac97",
 160         .id             = -1,
 161 };
 162
 163 static struct resource sa1111_resources[] = {
 164         [0] = {
 165                 .start  = 0x10000000,
 166                 .end    = 0x10001fff,
 167                 .flags  = IORESOURCE_MEM,
 168         },
 169         [1] = {
 170                 .start  = LUBBOCK_SA1111_IRQ,
 171                 .end    = LUBBOCK_SA1111_IRQ,
 172                 .flags  = IORESOURCE_IRQ,
 173         },
 174 };
 175
 176 static struct platform_device sa1111_device = {
 177         .name           = "sa1111",
 178         .id             = -1,
 179         .num_resources  = ARRAY_SIZE(sa1111_resources),
 180         .resource       = sa1111_resources,
 181 };
 182
 183 static struct resource smc91x_resources[] = {
 184         [0] = {
 185                 .name   = "smc91x-regs",
 186                 .start  = 0x0c000c00,
 187                 .end    = 0x0c0fffff,
 188                 .flags  = IORESOURCE_MEM,
 189         },
 190         [1] = {
 191                 .start  = LUBBOCK_ETH_IRQ,
 192                 .end    = LUBBOCK_ETH_IRQ,
 193                 .flags  = IORESOURCE_IRQ,
 194         },
 195         [2] = {
 196                 .name   = "smc91x-attrib",
 197                 .start  = 0x0e000000,
 198                 .end    = 0x0e0fffff,
 199                 .flags  = IORESOURCE_MEM,
 200         },
 201 };
 202
 203 /* ADS7846 is connected through SSP ... and if your board has J5 populated,
 204  * you can select it to replace the ucb1400 by switching the touchscreen cable
 205  * (to J5) and poking board registers (as done below).  Else it's only useful
 206  * for the temperature sensors.
 207  */
 208 static struct resource pxa_ssp_resources[] = {
 209         [0] = {
 210                 .start  = __PREG(SSCR0_P(1)),
 211                 .end    = __PREG(SSCR0_P(1)) + 0x14,
 212                 .flags  = IORESOURCE_MEM,
 213         },
 214         [1] = {
 215                 .start  = IRQ_SSP,
 216                 .end    = IRQ_SSP,
 217                 .flags  = IORESOURCE_IRQ,
 218         },
 219 };
 220
 221 static struct pxa2xx_spi_master pxa_ssp_master_info = {
 222         .ssp_type       = PXA25x_SSP,
 223         .clock_enable   = CKEN3_SSP,
 224         .num_chipselect = 0,
 225 };
 226
 227 static struct platform_device pxa_ssp = {
 228         .name           = "pxa2xx-spi",
 229         .id             = 1,
 230         .resource       = pxa_ssp_resources,
 231         .num_resources  = ARRAY_SIZE(pxa_ssp_resources),
 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 platform_device smc91x_device = {
 276         .name           = "smc91x",
 277         .id             = -1,
 278         .num_resources  = ARRAY_SIZE(smc91x_resources),
 279         .resource       = smc91x_resources,
 280 };
 281
 282 static struct resource flash_resources[] = {
 283         [0] = {
 284                 .start  = 0x00000000,
 285                 .end    = SZ_64M - 1,
 286                 .flags  = IORESOURCE_MEM,
 287         },
 288         [1] = {
 289                 .start  = 0x04000000,
 290                 .end    = 0x04000000 + SZ_64M - 1,
 291                 .flags  = IORESOURCE_MEM,
 292         },
 293 };
 294
 295 static struct mtd_partition lubbock_partitions[] = {
 296         {
 297                 .name =         "Bootloader",
 298                 .size =         0x00040000,
 299                 .offset =       0,
 300                 .mask_flags =   MTD_WRITEABLE  /* force read-only */
 301         },{
 302                 .name =         "Kernel",
 303                 .size =         0x00100000,
 304                 .offset =       0x00040000,
 305         },{
 306                 .name =         "Filesystem",
 307                 .size =         MTDPART_SIZ_FULL,
 308                 .offset =       0x00140000
 309         }
 310 };
 311
 312 static struct flash_platform_data lubbock_flash_data[2] = {
 313         {
 314                 .map_name       = "cfi_probe",
 315                 .parts          = lubbock_partitions,
 316                 .nr_parts       = ARRAY_SIZE(lubbock_partitions),
 317         }, {
 318                 .map_name       = "cfi_probe",
 319                 .parts          = NULL,
 320                 .nr_parts       = 0,
 321         }
 322 };
 323
 324 static struct platform_device lubbock_flash_device[2] = {
 325         {
 326                 .name           = "pxa2xx-flash",
 327                 .id             = 0,
 328                 .dev = {
 329                         .platform_data = &lubbock_flash_data[0],
 330                 },
 331                 .resource = &flash_resources[0],
 332                 .num_resources = 1,
 333         },
 334         {
 335                 .name           = "pxa2xx-flash",
 336                 .id             = 1,
 337                 .dev = {
 338                         .platform_data = &lubbock_flash_data[1],
 339                 },
 340                 .resource = &flash_resources[1],
 341                 .num_resources = 1,
 342         },
 343 };
 344
 345 static struct platform_device *devices[] __initdata = {
 346         &sa1111_device,
 347         &lub_audio_device,
 348         &smc91x_device,
 349         &lubbock_flash_device[0],
 350         &lubbock_flash_device[1],
 351         &pxa_ssp,
 352 };
 353
 354 static struct pxafb_mach_info sharp_lm8v31 __initdata = {
 355         .pixclock       = 270000,
 356         .xres           = 640,
 357         .yres           = 480,
 358         .bpp            = 16,
 359         .hsync_len      = 1,
 360         .left_margin    = 3,
 361         .right_margin   = 3,
 362         .vsync_len      = 1,
 363         .upper_margin   = 0,
 364         .lower_margin   = 0,
 365         .sync           = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 366         .cmap_greyscale = 0,
 367         .cmap_inverse   = 0,
 368         .cmap_static    = 0,
 369         .lccr0          = LCCR0_SDS,
 370         .lccr3          = LCCR3_PCP | LCCR3_Acb(255),
 371 };
 372
 373 #define MMC_POLL_RATE           msecs_to_jiffies(1000)
 374
 375 static void lubbock_mmc_poll(unsigned long);
 376 static irqreturn_t (*mmc_detect_int)(int, void *, struct pt_regs *);
 377
 378 static struct timer_list mmc_timer = {
 379         .function       = lubbock_mmc_poll,
 380 };
 381
 382 static void lubbock_mmc_poll(unsigned long data)
 383 {
 384         unsigned long flags;
 385
 386         /* clear any previous irq state, then ... */
 387         local_irq_save(flags);
 388         LUB_IRQ_SET_CLR &= ~(1 << 0);
 389         local_irq_restore(flags);
 390
 391         /* poll until mmc/sd card is removed */
 392         if (LUB_IRQ_SET_CLR & (1 << 0))
 393                 mod_timer(&mmc_timer, jiffies + MMC_POLL_RATE);
 394         else {
 395                 (void) mmc_detect_int(LUBBOCK_SD_IRQ, (void *)data, NULL);
 396                 enable_irq(LUBBOCK_SD_IRQ);
 397         }
 398 }
 399
 400 static irqreturn_t lubbock_detect_int(int irq, void *data, struct pt_regs *regs)
 401 {
 402         /* IRQ is level triggered; disable, and poll for removal */
 403         disable_irq(irq);
 404         mod_timer(&mmc_timer, jiffies + MMC_POLL_RATE);
 405
 406         return mmc_detect_int(irq, data, regs);
 407 }
 408
 409 static int lubbock_mci_init(struct device *dev,
 410                 irqreturn_t (*detect_int)(int, void *, struct pt_regs *),
 411                 void *data)
 412 {
 413         /* setup GPIO for PXA25x MMC controller */
 414         pxa_gpio_mode(GPIO6_MMCCLK_MD);
 415         pxa_gpio_mode(GPIO8_MMCCS0_MD);
 416
 417         /* detect card insert/eject */
 418         mmc_detect_int = detect_int;
 419         init_timer(&mmc_timer);
 420         mmc_timer.data = (unsigned long) data;
 421         return request_irq(LUBBOCK_SD_IRQ, lubbock_detect_int,
 422                         SA_SAMPLE_RANDOM, "lubbock-sd-detect", data);
 423 }
 424
 425 static int lubbock_mci_get_ro(struct device *dev)
 426 {
 427         return (LUB_MISC_RD & (1 << 2)) != 0;
 428 }
 429
 430 static void lubbock_mci_exit(struct device *dev, void *data)
 431 {
 432         free_irq(LUBBOCK_SD_IRQ, data);
 433         del_timer_sync(&mmc_timer);
 434 }
 435
 436 static struct pxamci_platform_data lubbock_mci_platform_data = {
 437         .ocr_mask       = MMC_VDD_32_33|MMC_VDD_33_34,
 438         .detect_delay   = 1,
 439         .init           = lubbock_mci_init,
 440         .get_ro         = lubbock_mci_get_ro,
 441         .exit           = lubbock_mci_exit,
 442 };
 443
 444 static void lubbock_irda_transceiver_mode(struct device *dev, int mode)
 445 {
 446         unsigned long flags;
 447
 448         local_irq_save(flags);
 449         if (mode & IR_SIRMODE) {
 450                 LUB_MISC_WR &= ~(1 << 4);
 451         } else if (mode & IR_FIRMODE) {
 452                 LUB_MISC_WR |= 1 << 4;
 453         }
 454         local_irq_restore(flags);
 455 }
 456
 457 static struct pxaficp_platform_data lubbock_ficp_platform_data = {
 458         .transceiver_cap  = IR_SIRMODE | IR_FIRMODE,
 459         .transceiver_mode = lubbock_irda_transceiver_mode,
 460 };
 461
 462 static void __init lubbock_init(void)
 463 {
 464         int flashboot = (LUB_CONF_SWITCHES & 1);
 465
 466         pxa_set_udc_info(&udc_info);
 467         set_pxa_fb_info(&sharp_lm8v31);
 468         pxa_set_mci_info(&lubbock_mci_platform_data);
 469         pxa_set_ficp_info(&lubbock_ficp_platform_data);
 470
 471         lubbock_flash_data[0].width = lubbock_flash_data[1].width =
 472                 (BOOT_DEF & 1) ? 2 : 4;
 473         /* Compensate for the nROMBT switch which swaps the flash banks */
 474         printk(KERN_NOTICE "Lubbock configured to boot from %s (bank %d)\n",
 475                flashboot?"Flash":"ROM", flashboot);
 476
 477         lubbock_flash_data[flashboot^1].name = "application-flash";
 478         lubbock_flash_data[flashboot].name = "boot-rom";
 479         (void) platform_add_devices(devices, ARRAY_SIZE(devices));
 480
 481         spi_register_board_info(spi_board_info, ARRAY_SIZE(spi_board_info));
 482 }
 483
 484 static struct map_desc lubbock_io_desc[] __initdata = {
 485         {       /* CPLD */
 486                 .virtual        =  LUBBOCK_FPGA_VIRT,
 487                 .pfn            = __phys_to_pfn(LUBBOCK_FPGA_PHYS),
 488                 .length         = 0x00100000,
 489                 .type           = MT_DEVICE
 490         }
 491 };
 492
 493 static void __init lubbock_map_io(void)
 494 {
 495         pxa_map_io();
 496         iotable_init(lubbock_io_desc, ARRAY_SIZE(lubbock_io_desc));
 497
 498         /* SSP data pins */
 499         pxa_gpio_mode(GPIO23_SCLK_MD);
 500         pxa_gpio_mode(GPIO25_STXD_MD);
 501         pxa_gpio_mode(GPIO26_SRXD_MD);
 502
 503         /* This enables the BTUART */
 504         pxa_gpio_mode(GPIO42_BTRXD_MD);
 505         pxa_gpio_mode(GPIO43_BTTXD_MD);
 506         pxa_gpio_mode(GPIO44_BTCTS_MD);
 507         pxa_gpio_mode(GPIO45_BTRTS_MD);
 508
 509         /* This is for the SMC chip select */
 510         pxa_gpio_mode(GPIO79_nCS_3_MD);
 511
 512         /* setup sleep mode values */
 513         PWER  = 0x00000002;
 514         PFER  = 0x00000000;
 515         PRER  = 0x00000002;
 516         PGSR0 = 0x00008000;
 517         PGSR1 = 0x003F0202;
 518         PGSR2 = 0x0001C000;
 519         PCFR |= PCFR_OPDE;
 520 }
 521
 522 MACHINE_START(LUBBOCK, "Intel DBPXA250 Development Platform (aka Lubbock)")
 523         /* Maintainer: MontaVista Software Inc. */
 524         .phys_io        = 0x40000000,
 525         .io_pg_offst    = (io_p2v(0x40000000) >> 18) & 0xfffc,
 526         .map_io         = lubbock_map_io,
 527         .init_irq       = lubbock_init_irq,
 528         .timer          = &pxa_timer,
 529         .init_machine   = lubbock_init,
 530 MACHINE_END