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/pxa-regs.h>
  46 #include <mach/pxa2xx-regs.h>
  47 #include <mach/bitfield.h>
  48 #include <mach/audio.h>
  49 #include <mach/pxafb.h>
  50 #include <mach/mfp-pxa25x.h>
  51 #include <mach/i2c.h>
  52 #include <mach/viper.h>
  53
  54 #include <asm/setup.h>
  55 #include <asm/mach-types.h>
  56 #include <asm/irq.h>
  57 #include <asm/sizes.h>
  58
  59 #include <asm/mach/arch.h>
  60 #include <asm/mach/map.h>
  61 #include <asm/mach/irq.h>
  62
  63 #include "generic.h"
  64 #include "devices.h"
  65
  66 static unsigned int icr;
  67
  68 static void viper_icr_set_bit(unsigned int bit)
  69 {
  70         icr |= bit;
  71         VIPER_ICR = icr;
  72 }
  73
  74 static void viper_icr_clear_bit(unsigned int bit)
  75 {
  76         icr &= ~bit;
  77         VIPER_ICR = icr;
  78 }
  79
  80 /* This function is used from the pcmcia module to reset the CF */
  81 void viper_cf_rst(int state)
  82 {
  83         if (state)
  84                 viper_icr_set_bit(VIPER_ICR_CF_RST);
  85         else
  86                 viper_icr_clear_bit(VIPER_ICR_CF_RST);
  87 }
  88 EXPORT_SYMBOL(viper_cf_rst);
  89
  90 /*
  91  * The CPLD version register was not present on VIPER boards prior to
  92  * v2i1. On v1 boards where the version register is not present we
  93  * will just read back the previous value from the databus.
  94  *
  95  * Therefore we do two reads. The first time we write 0 to the
  96  * (read-only) register before reading and the second time we write
  97  * 0xff first. If the two reads do not match or they read back as 0xff
  98  * or 0x00 then we have version 1 hardware.
  99  */
 100 static u8 viper_hw_version(void)
 101 {
 102         u8 v1, v2;
 103         unsigned long flags;
 104
 105         local_irq_save(flags);
 106
 107         VIPER_VERSION = 0;
 108         v1 = VIPER_VERSION;
 109         VIPER_VERSION = 0xff;
 110         v2 = VIPER_VERSION;
 111
 112         v1 = (v1 != v2 || v1 == 0xff) ? 0 : v1;
 113
 114         local_irq_restore(flags);
 115         return v1;
 116 }
 117
 118 /* CPU sysdev */
 119 static int viper_cpu_suspend(struct sys_device *sysdev, pm_message_t state)
 120 {
 121         viper_icr_set_bit(VIPER_ICR_R_DIS);
 122         return 0;
 123 }
 124
 125 static int viper_cpu_resume(struct sys_device *sysdev)
 126 {
 127         viper_icr_clear_bit(VIPER_ICR_R_DIS);
 128         return 0;
 129 }
 130
 131 static struct sysdev_driver viper_cpu_sysdev_driver = {
 132         .suspend        = viper_cpu_suspend,
 133         .resume         = viper_cpu_resume,
 134 };
 135
 136 static unsigned int current_voltage_divisor;
 137
 138 /*
 139  * If force is not true then step from existing to new divisor. If
 140  * force is true then jump straight to the new divisor. Stepping is
 141  * used because if the jump in voltage is too large, the VCC can dip
 142  * too low and the regulator cuts out.
 143  *
 144  * force can be used to initialize the divisor to a know state by
 145  * setting the value for the current clock speed, since we are already
 146  * running at that speed we know the voltage should be pretty close so
 147  * the jump won't be too large
 148  */
 149 static void viper_set_core_cpu_voltage(unsigned long khz, int force)
 150 {
 151         int i = 0;
 152         unsigned int divisor = 0;
 153         const char *v;
 154
 155         if (khz < 200000) {
 156                 v = "1.0"; divisor = 0xfff;
 157         } else if (khz < 300000) {
 158                 v = "1.1"; divisor = 0xde5;
 159         } else {
 160                 v = "1.3"; divisor = 0x325;
 161         }
 162
 163         pr_debug("viper: setting CPU core voltage to %sV at %d.%03dMHz\n",
 164                  v, (int)khz / 1000, (int)khz % 1000);
 165
 166 #define STEP 0x100
 167         do {
 168                 int step;
 169
 170                 if (force)
 171                         step = divisor;
 172                 else if (current_voltage_divisor < divisor - STEP)
 173                         step = current_voltage_divisor + STEP;
 174                 else if (current_voltage_divisor > divisor + STEP)
 175                         step = current_voltage_divisor - STEP;
 176                 else
 177                         step = divisor;
 178                 force = 0;
 179
 180                 gpio_set_value(VIPER_PSU_CLK_GPIO, 0);
 181                 gpio_set_value(VIPER_PSU_nCS_LD_GPIO, 0);
 182
 183                 for (i = 1 << 11 ; i > 0 ; i >>= 1) {
 184                         udelay(1);
 185
 186                         gpio_set_value(VIPER_PSU_DATA_GPIO, step & i);
 187                         udelay(1);
 188
 189                         gpio_set_value(VIPER_PSU_CLK_GPIO, 1);
 190                         udelay(1);
 191
 192                         gpio_set_value(VIPER_PSU_CLK_GPIO, 0);
 193                 }
 194                 udelay(1);
 195
 196                 gpio_set_value(VIPER_PSU_nCS_LD_GPIO, 1);
 197                 udelay(1);
 198
 199                 gpio_set_value(VIPER_PSU_nCS_LD_GPIO, 0);
 200
 201                 current_voltage_divisor = step;
 202         } while (current_voltage_divisor != divisor);
 203 }
 204
 205 /* Interrupt handling */
 206 static unsigned long viper_irq_enabled_mask;
 207
 208 static void viper_ack_irq(unsigned int irq)
 209 {
 210         int viper_irq = irq - PXA_ISA_IRQ(0);
 211
 212         if (viper_irq < 8)
 213                 VIPER_LO_IRQ_STATUS = 1 << viper_irq;
 214         else
 215                 VIPER_HI_IRQ_STATUS = 1 << (viper_irq - 8);
 216 }
 217
 218 static void viper_mask_irq(unsigned int irq)
 219 {
 220         viper_irq_enabled_mask &= ~(1 << (irq - PXA_ISA_IRQ(0)));
 221 }
 222
 223 static void viper_unmask_irq(unsigned int irq)
 224 {
 225         viper_irq_enabled_mask |= (1 << (irq - PXA_ISA_IRQ(0)));
 226 }
 227
 228 static inline unsigned long viper_irq_pending(void)
 229 {
 230         return (VIPER_HI_IRQ_STATUS << 8 | VIPER_LO_IRQ_STATUS) &
 231                         viper_irq_enabled_mask;
 232 }
 233
 234 static void viper_irq_handler(unsigned int irq, struct irq_desc *desc)
 235 {
 236         unsigned long pending;
 237
 238         pending = viper_irq_pending();
 239         do {
 240                 if (likely(pending)) {
 241                         irq = PXA_ISA_IRQ(0) + __ffs(pending);
 242                         generic_handle_irq(irq);
 243                 }
 244                 pending = viper_irq_pending();
 245         } while (pending);
 246 }
 247
 248 static struct irq_chip viper_irq_chip = {
 249         .name   = "ISA",
 250         .ack    = viper_ack_irq,
 251         .mask   = viper_mask_irq,
 252         .unmask = viper_unmask_irq
 253 };
 254
 255 static void __init viper_init_irq(void)
 256 {
 257         const int isa_irqs[] = { 3, 4, 5, 6, 7, 10, 11, 12, 9, 14, 15 };
 258         int irq;
 259         int isa_irq;
 260
 261         pxa25x_init_irq();
 262
 263         /* setup ISA IRQs */
 264         for (irq = 0; irq < ARRAY_SIZE(isa_irqs); irq++) {
 265                 isa_irq = isa_irqs[irq];
 266                 set_irq_chip(isa_irq, &viper_irq_chip);
 267                 set_irq_handler(isa_irq, handle_edge_irq);
 268                 set_irq_flags(isa_irq, IRQF_VALID | IRQF_PROBE);
 269         }
 270
 271         set_irq_chained_handler(gpio_to_irq(VIPER_CPLD_GPIO),
 272                                 viper_irq_handler);
 273         set_irq_type(gpio_to_irq(VIPER_CPLD_GPIO), IRQ_TYPE_EDGE_BOTH);
 274
 275 #ifndef CONFIG_SERIAL_PXA
 276         /*
 277          * 8250 doesn't support IRQ_TYPE being passed as part
 278          * of the plat_serial8250_port structure...
 279          */
 280         set_irq_type(gpio_to_irq(VIPER_UARTA_GPIO), IRQ_TYPE_EDGE_RISING);
 281         set_irq_type(gpio_to_irq(VIPER_UARTB_GPIO), IRQ_TYPE_EDGE_RISING);
 282 #endif
 283 }
 284
 285 /* Flat Panel */
 286 static struct pxafb_mode_info fb_mode_info[] = {
 287         {
 288                 .pixclock       = 157500,
 289
 290                 .xres           = 320,
 291                 .yres           = 240,
 292
 293                 .bpp            = 16,
 294
 295                 .hsync_len      = 63,
 296                 .left_margin    = 7,
 297                 .right_margin   = 13,
 298
 299                 .vsync_len      = 20,
 300                 .upper_margin   = 0,
 301                 .lower_margin   = 0,
 302
 303                 .sync           = 0,
 304         },
 305 };
 306
 307 static struct pxafb_mach_info fb_info = {
 308         .modes                  = fb_mode_info,
 309         .num_modes              = 1,
 310         .lcd_conn               = LCD_COLOR_TFT_16BPP | LCD_PCLK_EDGE_FALL,
 311 };
 312
 313 static int viper_backlight_init(struct device *dev)
 314 {
 315         int ret;
 316
 317         /* GPIO9 and 10 control FB backlight. Initialise to off */
 318         ret = gpio_request(VIPER_BCKLIGHT_EN_GPIO, "Backlight");
 319         if (ret)
 320                 goto err_request_bckl;
 321
 322         ret = gpio_request(VIPER_LCD_EN_GPIO, "LCD");
 323         if (ret)
 324                 goto err_request_lcd;
 325
 326         ret = gpio_direction_output(VIPER_BCKLIGHT_EN_GPIO, 0);
 327         if (ret)
 328                 goto err_dir;
 329
 330         ret = gpio_direction_output(VIPER_LCD_EN_GPIO, 0);
 331         if (ret)
 332                 goto err_dir;
 333
 334         return 0;
 335
 336 err_dir:
 337         gpio_free(VIPER_LCD_EN_GPIO);
 338 err_request_lcd:
 339         gpio_free(VIPER_BCKLIGHT_EN_GPIO);
 340 err_request_bckl:
 341         dev_err(dev, "Failed to setup LCD GPIOs\n");
 342
 343         return ret;
 344 }
 345
 346 static int viper_backlight_notify(int brightness)
 347 {
 348         gpio_set_value(VIPER_LCD_EN_GPIO, !!brightness);
 349         gpio_set_value(VIPER_BCKLIGHT_EN_GPIO, !!brightness);
 350
 351         return brightness;
 352 }
 353
 354 static void viper_backlight_exit(struct device *dev)
 355 {
 356         gpio_free(VIPER_LCD_EN_GPIO);
 357         gpio_free(VIPER_BCKLIGHT_EN_GPIO);
 358 }
 359
 360 static struct platform_pwm_backlight_data viper_backlight_data = {
 361         .pwm_id         = 0,
 362         .max_brightness = 100,
 363         .dft_brightness = 100,
 364         .pwm_period_ns  = 1000000,
 365         .init           = viper_backlight_init,
 366         .notify         = viper_backlight_notify,
 367         .exit           = viper_backlight_exit,
 368 };
 369
 370 static struct platform_device viper_backlight_device = {
 371         .name           = "pwm-backlight",
 372         .dev            = {
 373                 .parent         = &pxa25x_device_pwm0.dev,
 374                 .platform_data  = &viper_backlight_data,
 375         },
 376 };
 377
 378 /* Ethernet */
 379 static struct resource smc91x_resources[] = {
 380         [0] = {
 381                 .name   = "smc91x-regs",
 382                 .start  = VIPER_ETH_PHYS + 0x300,
 383                 .end    = VIPER_ETH_PHYS + 0x30f,
 384                 .flags  = IORESOURCE_MEM,
 385         },
 386         [1] = {
 387                 .start  = gpio_to_irq(VIPER_ETH_GPIO),
 388                 .end    = gpio_to_irq(VIPER_ETH_GPIO),
 389                 .flags  = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
 390         },
 391         [2] = {
 392                 .name   = "smc91x-data32",
 393                 .start  = VIPER_ETH_DATA_PHYS,
 394                 .end    = VIPER_ETH_DATA_PHYS + 3,
 395                 .flags  = IORESOURCE_MEM,
 396         },
 397 };
 398
 399 static struct smc91x_platdata viper_smc91x_info = {
 400         .flags  = SMC91X_USE_16BIT | SMC91X_NOWAIT,
 401         .leda   = RPC_LED_100_10,
 402         .ledb   = RPC_LED_TX_RX,
 403 };
 404
 405 static struct platform_device smc91x_device = {
 406         .name           = "smc91x",
 407         .id             = -1,
 408         .num_resources  = ARRAY_SIZE(smc91x_resources),
 409         .resource       = smc91x_resources,
 410         .dev            = {
 411                 .platform_data  = &viper_smc91x_info,
 412         },
 413 };
 414
 415 /* i2c */
 416 static struct i2c_gpio_platform_data i2c_bus_data = {
 417         .sda_pin = VIPER_RTC_I2C_SDA_GPIO,
 418         .scl_pin = VIPER_RTC_I2C_SCL_GPIO,
 419         .udelay  = 10,
 420         .timeout = 100,
 421 };
 422
 423 static struct platform_device i2c_bus_device = {
 424         .name           = "i2c-gpio",
 425         .id             = 1, /* pxa2xx-i2c is bus 0, so start at 1 */
 426         .dev = {
 427                 .platform_data = &i2c_bus_data,
 428         }
 429 };
 430
 431 static struct i2c_board_info __initdata viper_i2c_devices[] = {
 432         {
 433                 I2C_BOARD_INFO("ds1338", 0x68),
 434         },
 435 };
 436
 437 /*
 438  * Serial configuration:
 439  * You can either have the standard PXA ports driven by the PXA driver,
 440  * or all the ports (PXA + 16850) driven by the 8250 driver.
 441  * Choose your poison.
 442  */
 443
 444 static struct resource viper_serial_resources[] = {
 445 #ifndef CONFIG_SERIAL_PXA
 446         {
 447                 .start  = 0x40100000,
 448                 .end    = 0x4010001f,
 449                 .flags  = IORESOURCE_MEM,
 450         },
 451         {
 452                 .start  = 0x40200000,
 453                 .end    = 0x4020001f,
 454                 .flags  = IORESOURCE_MEM,
 455         },
 456         {
 457                 .start  = 0x40700000,
 458                 .end    = 0x4070001f,
 459                 .flags  = IORESOURCE_MEM,
 460         },
 461         {
 462                 .start  = VIPER_UARTA_PHYS,
 463                 .end    = VIPER_UARTA_PHYS + 0xf,
 464                 .flags  = IORESOURCE_MEM,
 465         },
 466         {
 467                 .start  = VIPER_UARTB_PHYS,
 468                 .end    = VIPER_UARTB_PHYS + 0xf,
 469                 .flags  = IORESOURCE_MEM,
 470         },
 471 #else
 472         {
 473                 0,
 474         },
 475 #endif
 476 };
 477
 478 static struct plat_serial8250_port serial_platform_data[] = {
 479 #ifndef CONFIG_SERIAL_PXA
 480         /* Internal UARTs */
 481         {
 482                 .membase        = (void *)&FFUART,
 483                 .mapbase        = __PREG(FFUART),
 484                 .irq            = IRQ_FFUART,
 485                 .uartclk        = 921600 * 16,
 486                 .regshift       = 2,
 487                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
 488                 .iotype         = UPIO_MEM,
 489         },
 490         {
 491                 .membase        = (void *)&BTUART,
 492                 .mapbase        = __PREG(BTUART),
 493                 .irq            = IRQ_BTUART,
 494                 .uartclk        = 921600 * 16,
 495                 .regshift       = 2,
 496                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
 497                 .iotype         = UPIO_MEM,
 498         },
 499         {
 500                 .membase        = (void *)&STUART,
 501                 .mapbase        = __PREG(STUART),
 502                 .irq            = IRQ_STUART,
 503                 .uartclk        = 921600 * 16,
 504                 .regshift       = 2,
 505                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
 506                 .iotype         = UPIO_MEM,
 507         },
 508         /* External UARTs */
 509         {
 510                 .mapbase        = VIPER_UARTA_PHYS,
 511                 .irq            = gpio_to_irq(VIPER_UARTA_GPIO),
 512                 .uartclk        = 1843200,
 513                 .regshift       = 1,
 514                 .iotype         = UPIO_MEM,
 515                 .flags          = UPF_BOOT_AUTOCONF | UPF_IOREMAP |
 516                                   UPF_SKIP_TEST,
 517         },
 518         {
 519                 .mapbase        = VIPER_UARTB_PHYS,
 520                 .irq            = gpio_to_irq(VIPER_UARTB_GPIO),
 521                 .uartclk        = 1843200,
 522                 .regshift       = 1,
 523                 .iotype         = UPIO_MEM,
 524                 .flags          = UPF_BOOT_AUTOCONF | UPF_IOREMAP |
 525                                   UPF_SKIP_TEST,
 526         },
 527 #endif
 528         { },
 529 };
 530
 531 static struct platform_device serial_device = {
 532         .name                   = "serial8250",
 533         .id                     = 0,
 534         .dev                    = {
 535                 .platform_data  = serial_platform_data,
 536         },
 537         .num_resources          = ARRAY_SIZE(viper_serial_resources),
 538         .resource               = viper_serial_resources,
 539 };
 540
 541 /* USB */
 542 static void isp116x_delay(struct device *dev, int delay)
 543 {
 544         ndelay(delay);
 545 }
 546
 547 static struct resource isp116x_resources[] = {
 548         [0] = { /* DATA */
 549                 .start  = VIPER_USB_PHYS + 0,
 550                 .end    = VIPER_USB_PHYS + 1,
 551                 .flags  = IORESOURCE_MEM,
 552         },
 553         [1] = { /* ADDR */
 554                 .start  = VIPER_USB_PHYS + 2,
 555                 .end    = VIPER_USB_PHYS + 3,
 556                 .flags  = IORESOURCE_MEM,
 557         },
 558         [2] = {
 559                 .start  = gpio_to_irq(VIPER_USB_GPIO),
 560                 .end    = gpio_to_irq(VIPER_USB_GPIO),
 561                 .flags  = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
 562         },
 563 };
 564
 565 /* (DataBusWidth16|AnalogOCEnable|DREQOutputPolarity|DownstreamPort15KRSel ) */
 566 static struct isp116x_platform_data isp116x_platform_data = {
 567         /* Enable internal resistors on downstream ports */
 568         .sel15Kres              = 1,
 569         /* On-chip overcurrent protection */
 570         .oc_enable              = 1,
 571         /* INT output polarity */
 572         .int_act_high           = 1,
 573         /* INT edge or level triggered */
 574         .int_edge_triggered     = 0,
 575
 576         /* WAKEUP pin connected - NOT SUPPORTED  */
 577         /* .remote_wakeup_connected = 0, */
 578         /* Wakeup by devices on usb bus enabled */
 579         .remote_wakeup_enable   = 0,
 580         .delay                  = isp116x_delay,
 581 };
 582
 583 static struct platform_device isp116x_device = {
 584         .name                   = "isp116x-hcd",
 585         .id                     = -1,
 586         .num_resources          = ARRAY_SIZE(isp116x_resources),
 587         .resource               = isp116x_resources,
 588         .dev                    = {
 589                 .platform_data  = &isp116x_platform_data,
 590         },
 591
 592 };
 593
 594 /* MTD */
 595 static struct resource mtd_resources[] = {
 596         [0] = { /* RedBoot config + filesystem flash */
 597                 .start  = VIPER_FLASH_PHYS,
 598                 .end    = VIPER_FLASH_PHYS + SZ_32M - 1,
 599                 .flags  = IORESOURCE_MEM,
 600         },
 601         [1] = { /* Boot flash */
 602                 .start  = VIPER_BOOT_PHYS,
 603                 .end    = VIPER_BOOT_PHYS + SZ_1M - 1,
 604                 .flags  = IORESOURCE_MEM,
 605         },
 606         [2] = { /*
 607                  * SRAM size is actually 256KB, 8bits, with a sparse mapping
 608                  * (each byte is on a 16bit boundary).
 609                  */
 610                 .start  = _VIPER_SRAM_BASE,
 611                 .end    = _VIPER_SRAM_BASE + SZ_512K - 1,
 612                 .flags  = IORESOURCE_MEM,
 613         },
 614 };
 615
 616 static struct mtd_partition viper_boot_flash_partition = {
 617         .name           = "RedBoot",
 618         .size           = SZ_1M,
 619         .offset         = 0,
 620         .mask_flags     = MTD_WRITEABLE,        /* force R/O */
 621 };
 622
 623 static struct physmap_flash_data viper_flash_data[] = {
 624         [0] = {
 625                 .width          = 2,
 626                 .parts          = NULL,
 627                 .nr_parts       = 0,
 628         },
 629         [1] = {
 630                 .width          = 2,
 631                 .parts          = &viper_boot_flash_partition,
 632                 .nr_parts       = 1,
 633         },
 634 };
 635
 636 static struct platform_device viper_mtd_devices[] = {
 637         [0] = {
 638                 .name           = "physmap-flash",
 639                 .id             = 0,
 640                 .dev            = {
 641                         .platform_data  = &viper_flash_data[0],
 642                 },
 643                 .resource       = &mtd_resources[0],
 644                 .num_resources  = 1,
 645         },
 646         [1] = {
 647                 .name           = "physmap-flash",
 648                 .id             = 1,
 649                 .dev            = {
 650                         .platform_data  = &viper_flash_data[1],
 651                 },
 652                 .resource       = &mtd_resources[1],
 653                 .num_resources  = 1,
 654         },
 655 };
 656
 657 static struct platform_device *viper_devs[] __initdata = {
 658         &smc91x_device,
 659         &i2c_bus_device,
 660         &serial_device,
 661         &isp116x_device,
 662         &viper_mtd_devices[0],
 663         &viper_mtd_devices[1],
 664         &viper_backlight_device,
 665 };
 666
 667 static mfp_cfg_t viper_pin_config[] __initdata = {
 668         /* Chip selects */
 669         GPIO15_nCS_1,
 670         GPIO78_nCS_2,
 671         GPIO79_nCS_3,
 672         GPIO80_nCS_4,
 673         GPIO33_nCS_5,
 674
 675         /* FP Backlight */
 676         GPIO9_GPIO,                             /* VIPER_BCKLIGHT_EN_GPIO */
 677         GPIO10_GPIO,                            /* VIPER_LCD_EN_GPIO */
 678         GPIO16_PWM0_OUT,
 679
 680         /* Ethernet PHY Ready */
 681         GPIO18_RDY,
 682
 683         /* Serial shutdown */
 684         GPIO12_GPIO | MFP_LPM_DRIVE_HIGH,       /* VIPER_UART_SHDN_GPIO */
 685
 686         /* Compact-Flash / PC104 */
 687         GPIO48_nPOE,
 688         GPIO49_nPWE,
 689         GPIO50_nPIOR,
 690         GPIO51_nPIOW,
 691         GPIO52_nPCE_1,
 692         GPIO53_nPCE_2,
 693         GPIO54_nPSKTSEL,
 694         GPIO55_nPREG,
 695         GPIO56_nPWAIT,
 696         GPIO57_nIOIS16,
 697         GPIO8_GPIO,                             /* VIPER_CF_RDY_GPIO */
 698         GPIO32_GPIO,                            /* VIPER_CF_CD_GPIO */
 699         GPIO82_GPIO,                            /* VIPER_CF_POWER_GPIO */
 700
 701         /* Integrated UPS control */
 702         GPIO20_GPIO,                            /* VIPER_UPS_GPIO */
 703
 704         /* Vcc regulator control */
 705         GPIO6_GPIO,                             /* VIPER_PSU_DATA_GPIO */
 706         GPIO11_GPIO,                            /* VIPER_PSU_CLK_GPIO */
 707         GPIO19_GPIO,                            /* VIPER_PSU_nCS_LD_GPIO */
 708
 709         /* i2c busses */
 710         GPIO26_GPIO,                            /* VIPER_TPM_I2C_SDA_GPIO */
 711         GPIO27_GPIO,                            /* VIPER_TPM_I2C_SCL_GPIO */
 712         GPIO83_GPIO,                            /* VIPER_RTC_I2C_SDA_GPIO */
 713         GPIO84_GPIO,                            /* VIPER_RTC_I2C_SCL_GPIO */
 714
 715         /* PC/104 Interrupt */
 716         GPIO1_GPIO | WAKEUP_ON_EDGE_RISE,       /* VIPER_CPLD_GPIO */
 717 };
 718
 719 static unsigned long viper_tpm;
 720
 721 static int __init viper_tpm_setup(char *str)
 722 {
 723         strict_strtoul(str, 10, &viper_tpm);
 724         return 1;
 725 }
 726
 727 __setup("tpm=", viper_tpm_setup);
 728
 729 static void __init viper_tpm_init(void)
 730 {
 731         struct platform_device *tpm_device;
 732         struct i2c_gpio_platform_data i2c_tpm_data = {
 733                 .sda_pin = VIPER_TPM_I2C_SDA_GPIO,
 734                 .scl_pin = VIPER_TPM_I2C_SCL_GPIO,
 735                 .udelay  = 10,
 736                 .timeout = 100,
 737         };
 738         char *errstr;
 739
 740         /* Allocate TPM i2c bus if requested */
 741         if (!viper_tpm)
 742                 return;
 743
 744         tpm_device = platform_device_alloc("i2c-gpio", 2);
 745         if (tpm_device) {
 746                 if (!platform_device_add_data(tpm_device,
 747                                               &i2c_tpm_data,
 748                                               sizeof(i2c_tpm_data))) {
 749                         if (platform_device_add(tpm_device)) {
 750                                 errstr = "register TPM i2c bus";
 751                                 goto error_free_tpm;
 752                         }
 753                 } else {
 754                         errstr = "allocate TPM i2c bus data";
 755                         goto error_free_tpm;
 756                 }
 757         } else {
 758                 errstr = "allocate TPM i2c device";
 759                 goto error_tpm;
 760         }
 761
 762         return;
 763
 764 error_free_tpm:
 765         kfree(tpm_device);
 766 error_tpm:
 767         pr_err("viper: Couldn't %s, giving up\n", errstr);
 768 }
 769
 770 static void __init viper_init_vcore_gpios(void)
 771 {
 772         if (gpio_request(VIPER_PSU_DATA_GPIO, "PSU data"))
 773                 goto err_request_data;
 774
 775         if (gpio_request(VIPER_PSU_CLK_GPIO, "PSU clock"))
 776                 goto err_request_clk;
 777
 778         if (gpio_request(VIPER_PSU_nCS_LD_GPIO, "PSU cs"))
 779                 goto err_request_cs;
 780
 781         if (gpio_direction_output(VIPER_PSU_DATA_GPIO, 0) ||
 782             gpio_direction_output(VIPER_PSU_CLK_GPIO, 0) ||
 783             gpio_direction_output(VIPER_PSU_nCS_LD_GPIO, 0))
 784                 goto err_dir;
 785
 786         /* c/should assume redboot set the correct level ??? */
 787         viper_set_core_cpu_voltage(get_clk_frequency_khz(0), 1);
 788
 789         return;
 790
 791 err_dir:
 792         gpio_free(VIPER_PSU_nCS_LD_GPIO);
 793 err_request_cs:
 794         gpio_free(VIPER_PSU_CLK_GPIO);
 795 err_request_clk:
 796         gpio_free(VIPER_PSU_DATA_GPIO);
 797 err_request_data:
 798         pr_err("viper: Failed to setup vcore control GPIOs\n");
 799 }
 800
 801 static void __init viper_init_serial_gpio(void)
 802 {
 803         if (gpio_request(VIPER_UART_SHDN_GPIO, "UARTs shutdown"))
 804                 goto err_request;
 805
 806         if (gpio_direction_output(VIPER_UART_SHDN_GPIO, 0))
 807                 goto err_dir;
 808
 809         return;
 810
 811 err_dir:
 812         gpio_free(VIPER_UART_SHDN_GPIO);
 813 err_request:
 814         pr_err("viper: Failed to setup UART shutdown GPIO\n");
 815 }
 816
 817 #ifdef CONFIG_CPU_FREQ
 818 static int viper_cpufreq_notifier(struct notifier_block *nb,
 819                                   unsigned long val, void *data)
 820 {
 821         struct cpufreq_freqs *freq = data;
 822
 823         /* TODO: Adjust timings??? */
 824
 825         switch (val) {
 826         case CPUFREQ_PRECHANGE:
 827                 if (freq->old < freq->new) {
 828                         /* we are getting faster so raise the voltage
 829                          * before we change freq */
 830                         viper_set_core_cpu_voltage(freq->new, 0);
 831                 }
 832                 break;
 833         case CPUFREQ_POSTCHANGE:
 834                 if (freq->old > freq->new) {
 835                         /* we are slowing down so drop the power
 836                          * after we change freq */
 837                         viper_set_core_cpu_voltage(freq->new, 0);
 838                 }
 839                 break;
 840         case CPUFREQ_RESUMECHANGE:
 841                 viper_set_core_cpu_voltage(freq->new, 0);
 842                 break;
 843         default:
 844                 /* ignore */
 845                 break;
 846         }
 847
 848         return 0;
 849 }
 850
 851 static struct notifier_block viper_cpufreq_notifier_block = {
 852         .notifier_call  = viper_cpufreq_notifier
 853 };
 854
 855 static void __init viper_init_cpufreq(void)
 856 {
 857         if (cpufreq_register_notifier(&viper_cpufreq_notifier_block,
 858                                       CPUFREQ_TRANSITION_NOTIFIER))
 859                 pr_err("viper: Failed to setup cpufreq notifier\n");
 860 }
 861 #else
 862 static inline void viper_init_cpufreq(void) {}
 863 #endif
 864
 865 static void viper_power_off(void)
 866 {
 867         pr_notice("Shutting off UPS\n");
 868         gpio_set_value(VIPER_UPS_GPIO, 1);
 869         /* Spin to death... */
 870         while (1);
 871 }
 872
 873 static void __init viper_init(void)
 874 {
 875         u8 version;
 876
 877         pm_power_off = viper_power_off;
 878
 879         pxa2xx_mfp_config(ARRAY_AND_SIZE(viper_pin_config));
 880
 881         /* Wake-up serial console */
 882         viper_init_serial_gpio();
 883
 884         set_pxa_fb_info(&fb_info);
 885
 886         /* v1 hardware cannot use the datacs line */
 887         version = viper_hw_version();
 888         if (version == 0)
 889                 smc91x_device.num_resources--;
 890
 891         pxa_set_i2c_info(NULL);
 892         platform_add_devices(viper_devs, ARRAY_SIZE(viper_devs));
 893
 894         viper_init_vcore_gpios();
 895         viper_init_cpufreq();
 896
 897         sysdev_driver_register(&cpu_sysdev_class, &viper_cpu_sysdev_driver);
 898
 899         if (version) {
 900                 pr_info("viper: hardware v%di%d detected. "
 901                         "CPLD revision %d.\n",
 902                         VIPER_BOARD_VERSION(version),
 903                         VIPER_BOARD_ISSUE(version),
 904                         VIPER_CPLD_REVISION(version));
 905                 system_rev = (VIPER_BOARD_VERSION(version) << 8) |
 906                              (VIPER_BOARD_ISSUE(version) << 4) |
 907                              VIPER_CPLD_REVISION(version);
 908         } else {
 909                 pr_info("viper: No version register.\n");
 910         }
 911
 912         i2c_register_board_info(1, ARRAY_AND_SIZE(viper_i2c_devices));
 913
 914         viper_tpm_init();
 915         pxa_set_ac97_info(NULL);
 916 }
 917
 918 static struct map_desc viper_io_desc[] __initdata = {
 919         {
 920                 .virtual = VIPER_CPLD_BASE,
 921                 .pfn     = __phys_to_pfn(VIPER_CPLD_PHYS),
 922                 .length  = 0x00300000,
 923                 .type    = MT_DEVICE,
 924         },
 925         {
 926                 .virtual = VIPER_PC104IO_BASE,
 927                 .pfn     = __phys_to_pfn(_PCMCIA1IO),
 928                 .length  = 0x00800000,
 929                 .type    = MT_DEVICE,
 930         },
 931 };
 932
 933 static void __init viper_map_io(void)
 934 {
 935         pxa_map_io();
 936
 937         iotable_init(viper_io_desc, ARRAY_SIZE(viper_io_desc));
 938
 939         PCFR |= PCFR_OPDE;
 940 }
 941
 942 MACHINE_START(VIPER, "Arcom/Eurotech VIPER SBC")
 943         /* Maintainer: Marc Zyngier <maz@misterjones.org> */
 944         .phys_io        = 0x40000000,
 945         .io_pg_offst    = (io_p2v(0x40000000) >> 18) & 0xfffc,
 946         .boot_params    = 0xa0000100,
 947         .map_io         = viper_map_io,
 948         .init_irq       = viper_init_irq,
 949         .timer          = &pxa_timer,
 950         .init_machine   = viper_init,
 951 MACHINE_END