arch/arm/mach-pxa/viper.c

   1 /*
   2  *  linux/arch/arm/mach-pxa/viper.c
   3  *
   4  *  Support for the Arcom VIPER SBC.
   5  *
   6  *  Author:     Ian Campbell
   7  *  Created:    Feb 03, 2003
   8  *  Copyright:  Arcom Control Systems
   9  *
  10  *  Maintained by Marc Zyngier <maz@misterjones.org>
  11  *                             <marc.zyngier@altran.com>
  12  *
  13  * Based on lubbock.c:
  14  *  Author:     Nicolas Pitre
  15  *  Created:    Jun 15, 2001
  16  *  Copyright:  MontaVista Software Inc.
  17  *
  18  *  This program is free software; you can redistribute it and/or modify
  19  *  it under the terms of the GNU General Public License version 2 as
  20  *  published by the Free Software Foundation.
  21  */
  22
  23 #include <linux/types.h>
  24 #include <linux/memory.h>
  25 #include <linux/cpu.h>
  26 #include <linux/cpufreq.h>
  27 #include <linux/delay.h>
  28 #include <linux/fs.h>
  29 #include <linux/init.h>
  30 #include <linux/interrupt.h>
  31 #include <linux/major.h>
  32 #include <linux/module.h>
  33 #include <linux/pm.h>
  34 #include <linux/sched.h>
  35 #include <linux/gpio.h>
  36 #include <linux/i2c-gpio.h>
  37 #include <linux/serial_8250.h>
  38 #include <linux/smc91x.h>
  39 #include <linux/pwm_backlight.h>
  40 #include <linux/usb/isp116x.h>
  41 #include <linux/mtd/mtd.h>
  42 #include <linux/mtd/partitions.h>
  43 #include <linux/mtd/physmap.h>
  44
  45 #include <mach/pxa25x.h>
  46 #include <mach/audio.h>
  47 #include <mach/pxafb.h>
  48 #include <plat/i2c.h>
  49 #include <mach/regs-uart.h>
  50 #include <mach/viper.h>
  51
  52 #include <asm/setup.h>
  53 #include <asm/mach-types.h>
  54 #include <asm/irq.h>
  55 #include <asm/sizes.h>
  56
  57 #include <asm/mach/arch.h>
  58 #include <asm/mach/map.h>
  59 #include <asm/mach/irq.h>
  60
  61 #include "generic.h"
  62 #include "devices.h"
  63
  64 static unsigned int icr;
  65
  66 static void viper_icr_set_bit(unsigned int bit)
  67 {
  68         icr |= bit;
  69         VIPER_ICR = icr;
  70 }
  71
  72 static void viper_icr_clear_bit(unsigned int bit)
  73 {
  74         icr &= ~bit;
  75         VIPER_ICR = icr;
  76 }
  77
  78 /* This function is used from the pcmcia module to reset the CF */
  79 void viper_cf_rst(int state)
  80 {
  81         if (state)
  82                 viper_icr_set_bit(VIPER_ICR_CF_RST);
  83         else
  84                 viper_icr_clear_bit(VIPER_ICR_CF_RST);
  85 }
  86 EXPORT_SYMBOL(viper_cf_rst);
  87
  88 /*
  89  * The CPLD version register was not present on VIPER boards prior to
  90  * v2i1. On v1 boards where the version register is not present we
  91  * will just read back the previous value from the databus.
  92  *
  93  * Therefore we do two reads. The first time we write 0 to the
  94  * (read-only) register before reading and the second time we write
  95  * 0xff first. If the two reads do not match or they read back as 0xff
  96  * or 0x00 then we have version 1 hardware.
  97  */
  98 static u8 viper_hw_version(void)
  99 {
 100         u8 v1, v2;
 101         unsigned long flags;
 102
 103         local_irq_save(flags);
 104
 105         VIPER_VERSION = 0;
 106         v1 = VIPER_VERSION;
 107         VIPER_VERSION = 0xff;
 108         v2 = VIPER_VERSION;
 109
 110         v1 = (v1 != v2 || v1 == 0xff) ? 0 : v1;
 111
 112         local_irq_restore(flags);
 113         return v1;
 114 }
 115
 116 /* CPU sysdev */
 117 static int viper_cpu_suspend(struct sys_device *sysdev, pm_message_t state)
 118 {
 119         viper_icr_set_bit(VIPER_ICR_R_DIS);
 120         return 0;
 121 }
 122
 123 static int viper_cpu_resume(struct sys_device *sysdev)
 124 {
 125         viper_icr_clear_bit(VIPER_ICR_R_DIS);
 126         return 0;
 127 }
 128
 129 static struct sysdev_driver viper_cpu_sysdev_driver = {
 130         .suspend        = viper_cpu_suspend,
 131         .resume         = viper_cpu_resume,
 132 };
 133
 134 static unsigned int current_voltage_divisor;
 135
 136 /*
 137  * If force is not true then step from existing to new divisor. If
 138  * force is true then jump straight to the new divisor. Stepping is
 139  * used because if the jump in voltage is too large, the VCC can dip
 140  * too low and the regulator cuts out.
 141  *
 142  * force can be used to initialize the divisor to a know state by
 143  * setting the value for the current clock speed, since we are already
 144  * running at that speed we know the voltage should be pretty close so
 145  * the jump won't be too large
 146  */
 147 static void viper_set_core_cpu_voltage(unsigned long khz, int force)
 148 {
 149         int i = 0;
 150         unsigned int divisor = 0;
 151         const char *v;
 152
 153         if (khz < 200000) {
 154                 v = "1.0"; divisor = 0xfff;
 155         } else if (khz < 300000) {
 156                 v = "1.1"; divisor = 0xde5;
 157         } else {
 158                 v = "1.3"; divisor = 0x325;
 159         }
 160
 161         pr_debug("viper: setting CPU core voltage to %sV at %d.%03dMHz\n",
 162                  v, (int)khz / 1000, (int)khz % 1000);
 163
 164 #define STEP 0x100
 165         do {
 166                 int step;
 167
 168                 if (force)
 169                         step = divisor;
 170                 else if (current_voltage_divisor < divisor - STEP)
 171                         step = current_voltage_divisor + STEP;
 172                 else if (current_voltage_divisor > divisor + STEP)
 173                         step = current_voltage_divisor - STEP;
 174                 else
 175                         step = divisor;
 176                 force = 0;
 177
 178                 gpio_set_value(VIPER_PSU_CLK_GPIO, 0);
 179                 gpio_set_value(VIPER_PSU_nCS_LD_GPIO, 0);
 180
 181                 for (i = 1 << 11 ; i > 0 ; i >>= 1) {
 182                         udelay(1);
 183
 184                         gpio_set_value(VIPER_PSU_DATA_GPIO, step & i);
 185                         udelay(1);
 186
 187                         gpio_set_value(VIPER_PSU_CLK_GPIO, 1);
 188                         udelay(1);
 189
 190                         gpio_set_value(VIPER_PSU_CLK_GPIO, 0);
 191                 }
 192                 udelay(1);
 193
 194                 gpio_set_value(VIPER_PSU_nCS_LD_GPIO, 1);
 195                 udelay(1);
 196
 197                 gpio_set_value(VIPER_PSU_nCS_LD_GPIO, 0);
 198
 199                 current_voltage_divisor = step;
 200         } while (current_voltage_divisor != divisor);
 201 }
 202
 203 /* Interrupt handling */
 204 static unsigned long viper_irq_enabled_mask;
 205 static const int viper_isa_irqs[] = { 3, 4, 5, 6, 7, 10, 11, 12, 9, 14, 15 };
 206 static const int viper_isa_irq_map[] = {
 207         0,              /* ISA irq #0, invalid */
 208         0,              /* ISA irq #1, invalid */
 209         0,              /* ISA irq #2, invalid */
 210         1 << 0,         /* ISA irq #3 */
 211         1 << 1,         /* ISA irq #4 */
 212         1 << 2,         /* ISA irq #5 */
 213         1 << 3,         /* ISA irq #6 */
 214         1 << 4,         /* ISA irq #7 */
 215         0,              /* ISA irq #8, invalid */
 216         1 << 8,         /* ISA irq #9 */
 217         1 << 5,         /* ISA irq #10 */
 218         1 << 6,         /* ISA irq #11 */
 219         1 << 7,         /* ISA irq #12 */
 220         0,              /* ISA irq #13, invalid */
 221         1 << 9,         /* ISA irq #14 */
 222         1 << 10,        /* ISA irq #15 */
 223 };
 224
 225 static inline int viper_irq_to_bitmask(unsigned int irq)
 226 {
 227         return viper_isa_irq_map[irq - PXA_ISA_IRQ(0)];
 228 }
 229
 230 static inline int viper_bit_to_irq(int bit)
 231 {
 232         return viper_isa_irqs[bit] + PXA_ISA_IRQ(0);
 233 }
 234
 235 static void viper_ack_irq(unsigned int irq)
 236 {
 237         int viper_irq = viper_irq_to_bitmask(irq);
 238
 239         if (viper_irq & 0xff)
 240                 VIPER_LO_IRQ_STATUS = viper_irq;
 241         else
 242                 VIPER_HI_IRQ_STATUS = (viper_irq >> 8);
 243 }
 244
 245 static void viper_mask_irq(unsigned int irq)
 246 {
 247         viper_irq_enabled_mask &= ~(viper_irq_to_bitmask(irq));
 248 }
 249
 250 static void viper_unmask_irq(unsigned int irq)
 251 {
 252         viper_irq_enabled_mask |= viper_irq_to_bitmask(irq);
 253 }
 254
 255 static inline unsigned long viper_irq_pending(void)
 256 {
 257         return (VIPER_HI_IRQ_STATUS << 8 | VIPER_LO_IRQ_STATUS) &
 258                         viper_irq_enabled_mask;
 259 }
 260
 261 static void viper_irq_handler(unsigned int irq, struct irq_desc *desc)
 262 {
 263         unsigned long pending;
 264
 265         pending = viper_irq_pending();
 266         do {
 267                 /* we're in a chained irq handler,
 268                  * so ack the interrupt by hand */
 269                 GEDR(VIPER_CPLD_GPIO) = GPIO_bit(VIPER_CPLD_GPIO);
 270
 271                 if (likely(pending)) {
 272                         irq = viper_bit_to_irq(__ffs(pending));
 273                         generic_handle_irq(irq);
 274                 }
 275                 pending = viper_irq_pending();
 276         } while (pending);
 277 }
 278
 279 static struct irq_chip viper_irq_chip = {
 280         .name   = "ISA",
 281         .ack    = viper_ack_irq,
 282         .mask   = viper_mask_irq,
 283         .unmask = viper_unmask_irq
 284 };
 285
 286 static void __init viper_init_irq(void)
 287 {
 288         int level;
 289         int isa_irq;
 290
 291         pxa25x_init_irq();
 292
 293         /* setup ISA IRQs */
 294         for (level = 0; level < ARRAY_SIZE(viper_isa_irqs); level++) {
 295                 isa_irq = viper_bit_to_irq(level);
 296                 set_irq_chip(isa_irq, &viper_irq_chip);
 297                 set_irq_handler(isa_irq, handle_edge_irq);
 298                 set_irq_flags(isa_irq, IRQF_VALID | IRQF_PROBE);
 299         }
 300
 301         set_irq_chained_handler(gpio_to_irq(VIPER_CPLD_GPIO),
 302                                 viper_irq_handler);
 303         set_irq_type(gpio_to_irq(VIPER_CPLD_GPIO), IRQ_TYPE_EDGE_BOTH);
 304 }
 305
 306 /* Flat Panel */
 307 static struct pxafb_mode_info fb_mode_info[] = {
 308         {
 309                 .pixclock       = 157500,
 310
 311                 .xres           = 320,
 312                 .yres           = 240,
 313
 314                 .bpp            = 16,
 315
 316                 .hsync_len      = 63,
 317                 .left_margin    = 7,
 318                 .right_margin   = 13,
 319
 320                 .vsync_len      = 20,
 321                 .upper_margin   = 0,
 322                 .lower_margin   = 0,
 323
 324                 .sync           = 0,
 325         },
 326 };
 327
 328 static struct pxafb_mach_info fb_info = {
 329         .modes                  = fb_mode_info,
 330         .num_modes              = 1,
 331         .lcd_conn               = LCD_COLOR_TFT_16BPP | LCD_PCLK_EDGE_FALL,
 332 };
 333
 334 static int viper_backlight_init(struct device *dev)
 335 {
 336         int ret;
 337
 338         /* GPIO9 and 10 control FB backlight. Initialise to off */
 339         ret = gpio_request(VIPER_BCKLIGHT_EN_GPIO, "Backlight");
 340         if (ret)
 341                 goto err_request_bckl;
 342
 343         ret = gpio_request(VIPER_LCD_EN_GPIO, "LCD");
 344         if (ret)
 345                 goto err_request_lcd;
 346
 347         ret = gpio_direction_output(VIPER_BCKLIGHT_EN_GPIO, 0);
 348         if (ret)
 349                 goto err_dir;
 350
 351         ret = gpio_direction_output(VIPER_LCD_EN_GPIO, 0);
 352         if (ret)
 353                 goto err_dir;
 354
 355         return 0;
 356
 357 err_dir:
 358         gpio_free(VIPER_LCD_EN_GPIO);
 359 err_request_lcd:
 360         gpio_free(VIPER_BCKLIGHT_EN_GPIO);
 361 err_request_bckl:
 362         dev_err(dev, "Failed to setup LCD GPIOs\n");
 363
 364         return ret;
 365 }
 366
 367 static int viper_backlight_notify(int brightness)
 368 {
 369         gpio_set_value(VIPER_LCD_EN_GPIO, !!brightness);
 370         gpio_set_value(VIPER_BCKLIGHT_EN_GPIO, !!brightness);
 371
 372         return brightness;
 373 }
 374
 375 static void viper_backlight_exit(struct device *dev)
 376 {
 377         gpio_free(VIPER_LCD_EN_GPIO);
 378         gpio_free(VIPER_BCKLIGHT_EN_GPIO);
 379 }
 380
 381 static struct platform_pwm_backlight_data viper_backlight_data = {
 382         .pwm_id         = 0,
 383         .max_brightness = 100,
 384         .dft_brightness = 100,
 385         .pwm_period_ns  = 1000000,
 386         .init           = viper_backlight_init,
 387         .notify         = viper_backlight_notify,
 388         .exit           = viper_backlight_exit,
 389 };
 390
 391 static struct platform_device viper_backlight_device = {
 392         .name           = "pwm-backlight",
 393         .dev            = {
 394                 .parent         = &pxa25x_device_pwm0.dev,
 395                 .platform_data  = &viper_backlight_data,
 396         },
 397 };
 398
 399 /* Ethernet */
 400 static struct resource smc91x_resources[] = {
 401         [0] = {
 402                 .name   = "smc91x-regs",
 403                 .start  = VIPER_ETH_PHYS + 0x300,
 404                 .end    = VIPER_ETH_PHYS + 0x30f,
 405                 .flags  = IORESOURCE_MEM,
 406         },
 407         [1] = {
 408                 .start  = gpio_to_irq(VIPER_ETH_GPIO),
 409                 .end    = gpio_to_irq(VIPER_ETH_GPIO),
 410                 .flags  = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
 411         },
 412         [2] = {
 413                 .name   = "smc91x-data32",
 414                 .start  = VIPER_ETH_DATA_PHYS,
 415                 .end    = VIPER_ETH_DATA_PHYS + 3,
 416                 .flags  = IORESOURCE_MEM,
 417         },
 418 };
 419
 420 static struct smc91x_platdata viper_smc91x_info = {
 421         .flags  = SMC91X_USE_16BIT | SMC91X_NOWAIT,
 422         .leda   = RPC_LED_100_10,
 423         .ledb   = RPC_LED_TX_RX,
 424 };
 425
 426 static struct platform_device smc91x_device = {
 427         .name           = "smc91x",
 428         .id             = -1,
 429         .num_resources  = ARRAY_SIZE(smc91x_resources),
 430         .resource       = smc91x_resources,
 431         .dev            = {
 432                 .platform_data  = &viper_smc91x_info,
 433         },
 434 };
 435
 436 /* i2c */
 437 static struct i2c_gpio_platform_data i2c_bus_data = {
 438         .sda_pin = VIPER_RTC_I2C_SDA_GPIO,
 439         .scl_pin = VIPER_RTC_I2C_SCL_GPIO,
 440         .udelay  = 10,
 441         .timeout = 100,
 442 };
 443
 444 static struct platform_device i2c_bus_device = {
 445         .name           = "i2c-gpio",
 446         .id             = 1, /* pxa2xx-i2c is bus 0, so start at 1 */
 447         .dev = {
 448                 .platform_data = &i2c_bus_data,
 449         }
 450 };
 451
 452 static struct i2c_board_info __initdata viper_i2c_devices[] = {
 453         {
 454                 I2C_BOARD_INFO("ds1338", 0x68),
 455         },
 456 };
 457
 458 /*
 459  * Serial configuration:
 460  * You can either have the standard PXA ports driven by the PXA driver,
 461  * or all the ports (PXA + 16850) driven by the 8250 driver.
 462  * Choose your poison.
 463  */
 464
 465 static struct resource viper_serial_resources[] = {
 466 #ifndef CONFIG_SERIAL_PXA
 467         {
 468                 .start  = 0x40100000,
 469                 .end    = 0x4010001f,
 470                 .flags  = IORESOURCE_MEM,
 471         },
 472         {
 473                 .start  = 0x40200000,
 474                 .end    = 0x4020001f,
 475                 .flags  = IORESOURCE_MEM,
 476         },
 477         {
 478                 .start  = 0x40700000,
 479                 .end    = 0x4070001f,
 480                 .flags  = IORESOURCE_MEM,
 481         },
 482         {
 483                 .start  = VIPER_UARTA_PHYS,
 484                 .end    = VIPER_UARTA_PHYS + 0xf,
 485                 .flags  = IORESOURCE_MEM,
 486         },
 487         {
 488                 .start  = VIPER_UARTB_PHYS,
 489                 .end    = VIPER_UARTB_PHYS + 0xf,
 490                 .flags  = IORESOURCE_MEM,
 491         },
 492 #else
 493         {
 494                 0,
 495         },
 496 #endif
 497 };
 498
 499 static struct plat_serial8250_port serial_platform_data[] = {
 500 #ifndef CONFIG_SERIAL_PXA
 501         /* Internal UARTs */
 502         {
 503                 .membase        = (void *)&FFUART,
 504                 .mapbase        = __PREG(FFUART),
 505                 .irq            = IRQ_FFUART,
 506                 .uartclk        = 921600 * 16,
 507                 .regshift       = 2,
 508                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
 509                 .iotype         = UPIO_MEM,
 510         },
 511         {
 512                 .membase        = (void *)&BTUART,
 513                 .mapbase        = __PREG(BTUART),
 514                 .irq            = IRQ_BTUART,
 515                 .uartclk        = 921600 * 16,
 516                 .regshift       = 2,
 517                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
 518                 .iotype         = UPIO_MEM,
 519         },
 520         {
 521                 .membase        = (void *)&STUART,
 522                 .mapbase        = __PREG(STUART),
 523                 .irq            = IRQ_STUART,
 524                 .uartclk        = 921600 * 16,
 525                 .regshift       = 2,
 526                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
 527                 .iotype         = UPIO_MEM,
 528         },
 529         /* External UARTs */
 530         {
 531                 .mapbase        = VIPER_UARTA_PHYS,
 532                 .irq            = gpio_to_irq(VIPER_UARTA_GPIO),
 533                 .irqflags       = IRQF_TRIGGER_RISING,
 534                 .uartclk        = 1843200,
 535                 .regshift       = 1,
 536                 .iotype         = UPIO_MEM,
 537                 .flags          = UPF_BOOT_AUTOCONF | UPF_IOREMAP |
 538                                   UPF_SKIP_TEST,
 539         },
 540         {
 541                 .mapbase        = VIPER_UARTB_PHYS,
 542                 .irq            = gpio_to_irq(VIPER_UARTB_GPIO),
 543                 .irqflags       = IRQF_TRIGGER_RISING,
 544                 .uartclk        = 1843200,
 545                 .regshift       = 1,
 546                 .iotype         = UPIO_MEM,
 547                 .flags          = UPF_BOOT_AUTOCONF | UPF_IOREMAP |
 548                                   UPF_SKIP_TEST,
 549         },
 550 #endif
 551         { },
 552 };
 553
 554 static struct platform_device serial_device = {
 555         .name                   = "serial8250",
 556         .id                     = 0,
 557         .dev                    = {
 558                 .platform_data  = serial_platform_data,
 559         },
 560         .num_resources          = ARRAY_SIZE(viper_serial_resources),
 561         .resource               = viper_serial_resources,
 562 };
 563
 564 /* USB */
 565 static void isp116x_delay(struct device *dev, int delay)
 566 {
 567         ndelay(delay);
 568 }
 569
 570 static struct resource isp116x_resources[] = {
 571         [0] = { /* DATA */
 572                 .start  = VIPER_USB_PHYS + 0,
 573                 .end    = VIPER_USB_PHYS + 1,
 574                 .flags  = IORESOURCE_MEM,
 575         },
 576         [1] = { /* ADDR */
 577                 .start  = VIPER_USB_PHYS + 2,
 578                 .end    = VIPER_USB_PHYS + 3,
 579                 .flags  = IORESOURCE_MEM,
 580         },
 581         [2] = {
 582                 .start  = gpio_to_irq(VIPER_USB_GPIO),
 583                 .end    = gpio_to_irq(VIPER_USB_GPIO),
 584                 .flags  = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
 585         },
 586 };
 587
 588 /* (DataBusWidth16|AnalogOCEnable|DREQOutputPolarity|DownstreamPort15KRSel ) */
 589 static struct isp116x_platform_data isp116x_platform_data = {
 590         /* Enable internal resistors on downstream ports */
 591         .sel15Kres              = 1,
 592         /* On-chip overcurrent protection */
 593         .oc_enable              = 1,
 594         /* INT output polarity */
 595         .int_act_high           = 1,
 596         /* INT edge or level triggered */
 597         .int_edge_triggered     = 0,
 598
 599         /* WAKEUP pin connected - NOT SUPPORTED  */
 600         /* .remote_wakeup_connected = 0, */
 601         /* Wakeup by devices on usb bus enabled */
 602         .remote_wakeup_enable   = 0,
 603         .delay                  = isp116x_delay,
 604 };
 605
 606 static struct platform_device isp116x_device = {
 607         .name                   = "isp116x-hcd",
 608         .id                     = -1,
 609         .num_resources          = ARRAY_SIZE(isp116x_resources),
 610         .resource               = isp116x_resources,
 611         .dev                    = {
 612                 .platform_data  = &isp116x_platform_data,
 613         },
 614
 615 };
 616
 617 /* MTD */
 618 static struct resource mtd_resources[] = {
 619         [0] = { /* RedBoot config + filesystem flash */
 620                 .start  = VIPER_FLASH_PHYS,
 621                 .end    = VIPER_FLASH_PHYS + SZ_32M - 1,
 622                 .flags  = IORESOURCE_MEM,
 623         },
 624         [1] = { /* Boot flash */
 625                 .start  = VIPER_BOOT_PHYS,
 626                 .end    = VIPER_BOOT_PHYS + SZ_1M - 1,
 627                 .flags  = IORESOURCE_MEM,
 628         },
 629         [2] = { /*
 630                  * SRAM size is actually 256KB, 8bits, with a sparse mapping
 631                  * (each byte is on a 16bit boundary).
 632                  */
 633                 .start  = _VIPER_SRAM_BASE,
 634                 .end    = _VIPER_SRAM_BASE + SZ_512K - 1,
 635                 .flags  = IORESOURCE_MEM,
 636         },
 637 };
 638
 639 static struct mtd_partition viper_boot_flash_partition = {
 640         .name           = "RedBoot",
 641         .size           = SZ_1M,
 642         .offset         = 0,
 643         .mask_flags     = MTD_WRITEABLE,        /* force R/O */
 644 };
 645
 646 static struct physmap_flash_data viper_flash_data[] = {
 647         [0] = {
 648                 .width          = 2,
 649                 .parts          = NULL,
 650                 .nr_parts       = 0,
 651         },
 652         [1] = {
 653                 .width          = 2,
 654                 .parts          = &viper_boot_flash_partition,
 655                 .nr_parts       = 1,
 656         },
 657 };
 658
 659 static struct platform_device viper_mtd_devices[] = {
 660         [0] = {
 661                 .name           = "physmap-flash",
 662                 .id             = 0,
 663                 .dev            = {
 664                         .platform_data  = &viper_flash_data[0],
 665                 },
 666                 .resource       = &mtd_resources[0],
 667                 .num_resources  = 1,
 668         },
 669         [1] = {
 670                 .name           = "physmap-flash",
 671                 .id             = 1,
 672                 .dev            = {
 673                         .platform_data  = &viper_flash_data[1],
 674                 },
 675                 .resource       = &mtd_resources[1],
 676                 .num_resources  = 1,
 677         },
 678 };
 679
 680 static struct platform_device *viper_devs[] __initdata = {
 681         &smc91x_device,
 682         &i2c_bus_device,
 683         &serial_device,
 684         &isp116x_device,
 685         &viper_mtd_devices[0],
 686         &viper_mtd_devices[1],
 687         &viper_backlight_device,
 688 };
 689
 690 static mfp_cfg_t viper_pin_config[] __initdata = {
 691         /* Chip selects */
 692         GPIO15_nCS_1,
 693         GPIO78_nCS_2,
 694         GPIO79_nCS_3,
 695         GPIO80_nCS_4,
 696         GPIO33_nCS_5,
 697
 698         /* FP Backlight */
 699         GPIO9_GPIO,                             /* VIPER_BCKLIGHT_EN_GPIO */
 700         GPIO10_GPIO,                            /* VIPER_LCD_EN_GPIO */
 701         GPIO16_PWM0_OUT,
 702
 703         /* Ethernet PHY Ready */
 704         GPIO18_RDY,
 705
 706         /* Serial shutdown */
 707         GPIO12_GPIO | MFP_LPM_DRIVE_HIGH,       /* VIPER_UART_SHDN_GPIO */
 708
 709         /* Compact-Flash / PC104 */
 710         GPIO48_nPOE,
 711         GPIO49_nPWE,
 712         GPIO50_nPIOR,
 713         GPIO51_nPIOW,
 714         GPIO52_nPCE_1,
 715         GPIO53_nPCE_2,
 716         GPIO54_nPSKTSEL,
 717         GPIO55_nPREG,
 718         GPIO56_nPWAIT,
 719         GPIO57_nIOIS16,
 720         GPIO8_GPIO,                             /* VIPER_CF_RDY_GPIO */
 721         GPIO32_GPIO,                            /* VIPER_CF_CD_GPIO */
 722         GPIO82_GPIO,                            /* VIPER_CF_POWER_GPIO */
 723
 724         /* Integrated UPS control */
 725         GPIO20_GPIO,                            /* VIPER_UPS_GPIO */
 726
 727         /* Vcc regulator control */
 728         GPIO6_GPIO,                             /* VIPER_PSU_DATA_GPIO */
 729         GPIO11_GPIO,                            /* VIPER_PSU_CLK_GPIO */
 730         GPIO19_GPIO,                            /* VIPER_PSU_nCS_LD_GPIO */
 731
 732         /* i2c busses */
 733         GPIO26_GPIO,                            /* VIPER_TPM_I2C_SDA_GPIO */
 734         GPIO27_GPIO,                            /* VIPER_TPM_I2C_SCL_GPIO */
 735         GPIO83_GPIO,                            /* VIPER_RTC_I2C_SDA_GPIO */
 736         GPIO84_GPIO,                            /* VIPER_RTC_I2C_SCL_GPIO */
 737
 738         /* PC/104 Interrupt */
 739         GPIO1_GPIO | WAKEUP_ON_EDGE_RISE,       /* VIPER_CPLD_GPIO */
 740 };
 741
 742 static unsigned long viper_tpm;
 743
 744 static int __init viper_tpm_setup(char *str)
 745 {
 746         strict_strtoul(str, 10, &viper_tpm);
 747         return 1;
 748 }
 749
 750 __setup("tpm=", viper_tpm_setup);
 751
 752 static void __init viper_tpm_init(void)
 753 {
 754         struct platform_device *tpm_device;
 755         struct i2c_gpio_platform_data i2c_tpm_data = {
 756                 .sda_pin = VIPER_TPM_I2C_SDA_GPIO,
 757                 .scl_pin = VIPER_TPM_I2C_SCL_GPIO,
 758                 .udelay  = 10,
 759                 .timeout = 100,
 760         };
 761         char *errstr;
 762
 763         /* Allocate TPM i2c bus if requested */
 764         if (!viper_tpm)
 765                 return;
 766
 767         tpm_device = platform_device_alloc("i2c-gpio", 2);
 768         if (tpm_device) {
 769                 if (!platform_device_add_data(tpm_device,
 770                                               &i2c_tpm_data,
 771                                               sizeof(i2c_tpm_data))) {
 772                         if (platform_device_add(tpm_device)) {
 773                                 errstr = "register TPM i2c bus";
 774                                 goto error_free_tpm;
 775                         }
 776                 } else {
 777                         errstr = "allocate TPM i2c bus data";
 778                         goto error_free_tpm;
 779                 }
 780         } else {
 781                 errstr = "allocate TPM i2c device";
 782                 goto error_tpm;
 783         }
 784
 785         return;
 786
 787 error_free_tpm:
 788         kfree(tpm_device);
 789 error_tpm:
 790         pr_err("viper: Couldn't %s, giving up\n", errstr);
 791 }
 792
 793 static void __init viper_init_vcore_gpios(void)
 794 {
 795         if (gpio_request(VIPER_PSU_DATA_GPIO, "PSU data"))
 796                 goto err_request_data;
 797
 798         if (gpio_request(VIPER_PSU_CLK_GPIO, "PSU clock"))
 799                 goto err_request_clk;
 800
 801         if (gpio_request(VIPER_PSU_nCS_LD_GPIO, "PSU cs"))
 802                 goto err_request_cs;
 803
 804         if (gpio_direction_output(VIPER_PSU_DATA_GPIO, 0) ||
 805             gpio_direction_output(VIPER_PSU_CLK_GPIO, 0) ||
 806             gpio_direction_output(VIPER_PSU_nCS_LD_GPIO, 0))
 807                 goto err_dir;
 808
 809         /* c/should assume redboot set the correct level ??? */
 810         viper_set_core_cpu_voltage(get_clk_frequency_khz(0), 1);
 811
 812         return;
 813
 814 err_dir:
 815         gpio_free(VIPER_PSU_nCS_LD_GPIO);
 816 err_request_cs:
 817         gpio_free(VIPER_PSU_CLK_GPIO);
 818 err_request_clk:
 819         gpio_free(VIPER_PSU_DATA_GPIO);
 820 err_request_data:
 821         pr_err("viper: Failed to setup vcore control GPIOs\n");
 822 }
 823
 824 static void __init viper_init_serial_gpio(void)
 825 {
 826         if (gpio_request(VIPER_UART_SHDN_GPIO, "UARTs shutdown"))
 827                 goto err_request;
 828
 829         if (gpio_direction_output(VIPER_UART_SHDN_GPIO, 0))
 830                 goto err_dir;
 831
 832         return;
 833
 834 err_dir:
 835         gpio_free(VIPER_UART_SHDN_GPIO);
 836 err_request:
 837         pr_err("viper: Failed to setup UART shutdown GPIO\n");
 838 }
 839
 840 #ifdef CONFIG_CPU_FREQ
 841 static int viper_cpufreq_notifier(struct notifier_block *nb,
 842                                   unsigned long val, void *data)
 843 {
 844         struct cpufreq_freqs *freq = data;
 845
 846         /* TODO: Adjust timings??? */
 847
 848         switch (val) {
 849         case CPUFREQ_PRECHANGE:
 850                 if (freq->old < freq->new) {
 851                         /* we are getting faster so raise the voltage
 852                          * before we change freq */
 853                         viper_set_core_cpu_voltage(freq->new, 0);
 854                 }
 855                 break;
 856         case CPUFREQ_POSTCHANGE:
 857                 if (freq->old > freq->new) {
 858                         /* we are slowing down so drop the power
 859                          * after we change freq */
 860                         viper_set_core_cpu_voltage(freq->new, 0);
 861                 }
 862                 break;
 863         case CPUFREQ_RESUMECHANGE:
 864                 viper_set_core_cpu_voltage(freq->new, 0);
 865                 break;
 866         default:
 867                 /* ignore */
 868                 break;
 869         }
 870
 871         return 0;
 872 }
 873
 874 static struct notifier_block viper_cpufreq_notifier_block = {
 875         .notifier_call  = viper_cpufreq_notifier
 876 };
 877
 878 static void __init viper_init_cpufreq(void)
 879 {
 880         if (cpufreq_register_notifier(&viper_cpufreq_notifier_block,
 881                                       CPUFREQ_TRANSITION_NOTIFIER))
 882                 pr_err("viper: Failed to setup cpufreq notifier\n");
 883 }
 884 #else
 885 static inline void viper_init_cpufreq(void) {}
 886 #endif
 887
 888 static void viper_power_off(void)
 889 {
 890         pr_notice("Shutting off UPS\n");
 891         gpio_set_value(VIPER_UPS_GPIO, 1);
 892         /* Spin to death... */
 893         while (1);
 894 }
 895
 896 static void __init viper_init(void)
 897 {
 898         u8 version;
 899
 900         pm_power_off = viper_power_off;
 901
 902         pxa2xx_mfp_config(ARRAY_AND_SIZE(viper_pin_config));
 903
 904         pxa_set_ffuart_info(NULL);
 905         pxa_set_btuart_info(NULL);
 906         pxa_set_stuart_info(NULL);
 907
 908         /* Wake-up serial console */
 909         viper_init_serial_gpio();
 910
 911         set_pxa_fb_info(&fb_info);
 912
 913         /* v1 hardware cannot use the datacs line */
 914         version = viper_hw_version();
 915         if (version == 0)
 916                 smc91x_device.num_resources--;
 917
 918         pxa_set_i2c_info(NULL);
 919         platform_add_devices(viper_devs, ARRAY_SIZE(viper_devs));
 920
 921         viper_init_vcore_gpios();
 922         viper_init_cpufreq();
 923
 924         sysdev_driver_register(&cpu_sysdev_class, &viper_cpu_sysdev_driver);
 925
 926         if (version) {
 927                 pr_info("viper: hardware v%di%d detected. "
 928                         "CPLD revision %d.\n",
 929                         VIPER_BOARD_VERSION(version),
 930                         VIPER_BOARD_ISSUE(version),
 931                         VIPER_CPLD_REVISION(version));
 932                 system_rev = (VIPER_BOARD_VERSION(version) << 8) |
 933                              (VIPER_BOARD_ISSUE(version) << 4) |
 934                              VIPER_CPLD_REVISION(version);
 935         } else {
 936                 pr_info("viper: No version register.\n");
 937         }
 938
 939         i2c_register_board_info(1, ARRAY_AND_SIZE(viper_i2c_devices));
 940
 941         viper_tpm_init();
 942         pxa_set_ac97_info(NULL);
 943 }
 944
 945 static struct map_desc viper_io_desc[] __initdata = {
 946         {
 947                 .virtual = VIPER_CPLD_BASE,
 948                 .pfn     = __phys_to_pfn(VIPER_CPLD_PHYS),
 949                 .length  = 0x00300000,
 950                 .type    = MT_DEVICE,
 951         },
 952         {
 953                 .virtual = VIPER_PC104IO_BASE,
 954                 .pfn     = __phys_to_pfn(0x30000000),
 955                 .length  = 0x00800000,
 956                 .type    = MT_DEVICE,
 957         },
 958 };
 959
 960 static void __init viper_map_io(void)
 961 {
 962         pxa_map_io();
 963
 964         iotable_init(viper_io_desc, ARRAY_SIZE(viper_io_desc));
 965
 966         PCFR |= PCFR_OPDE;
 967 }
 968
 969 MACHINE_START(VIPER, "Arcom/Eurotech VIPER SBC")
 970         /* Maintainer: Marc Zyngier <maz@misterjones.org> */
 971         .phys_io        = 0x40000000,
 972         .io_pg_offst    = (io_p2v(0x40000000) >> 18) & 0xfffc,
 973         .boot_params    = 0xa0000100,
 974         .map_io         = viper_map_io,
 975         .init_irq       = viper_init_irq,
 976         .timer          = &pxa_timer,
 977         .init_machine   = viper_init,
 978 MACHINE_END