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 static const int viper_isa_irqs[] = { 3, 4, 5, 6, 7, 10, 11, 12, 9, 14, 15 };
 208 static const int viper_isa_irq_map[] = {
 209         0,              /* ISA irq #0, invalid */
 210         0,              /* ISA irq #1, invalid */
 211         0,              /* ISA irq #2, invalid */
 212         1 << 0,         /* ISA irq #3 */
 213         1 << 1,         /* ISA irq #4 */
 214         1 << 2,         /* ISA irq #5 */
 215         1 << 3,         /* ISA irq #6 */
 216         1 << 4,         /* ISA irq #7 */
 217         0,              /* ISA irq #8, invalid */
 218         1 << 8,         /* ISA irq #9 */
 219         1 << 5,         /* ISA irq #10 */
 220         1 << 6,         /* ISA irq #11 */
 221         1 << 7,         /* ISA irq #12 */
 222         0,              /* ISA irq #13, invalid */
 223         1 << 9,         /* ISA irq #14 */
 224         1 << 10,        /* ISA irq #15 */
 225 };
 226
 227 static inline int viper_irq_to_bitmask(unsigned int irq)
 228 {
 229         return viper_isa_irq_map[irq - PXA_ISA_IRQ(0)];
 230 }
 231
 232 static inline int viper_bit_to_irq(int bit)
 233 {
 234         return viper_isa_irqs[bit] + PXA_ISA_IRQ(0);
 235 }
 236
 237 static void viper_ack_irq(unsigned int irq)
 238 {
 239         int viper_irq = viper_irq_to_bitmask(irq);
 240
 241         if (viper_irq & 0xff)
 242                 VIPER_LO_IRQ_STATUS = viper_irq;
 243         else
 244                 VIPER_HI_IRQ_STATUS = (viper_irq >> 8);
 245 }
 246
 247 static void viper_mask_irq(unsigned int irq)
 248 {
 249         viper_irq_enabled_mask &= ~(viper_irq_to_bitmask(irq));
 250 }
 251
 252 static void viper_unmask_irq(unsigned int irq)
 253 {
 254         viper_irq_enabled_mask |= viper_irq_to_bitmask(irq);
 255 }
 256
 257 static inline unsigned long viper_irq_pending(void)
 258 {
 259         return (VIPER_HI_IRQ_STATUS << 8 | VIPER_LO_IRQ_STATUS) &
 260                         viper_irq_enabled_mask;
 261 }
 262
 263 static void viper_irq_handler(unsigned int irq, struct irq_desc *desc)
 264 {
 265         unsigned long pending;
 266
 267         pending = viper_irq_pending();
 268         do {
 269                 /* we're in a chained irq handler,
 270                  * so ack the interrupt by hand */
 271                 GEDR(VIPER_CPLD_GPIO) = GPIO_bit(VIPER_CPLD_GPIO);
 272
 273                 if (likely(pending)) {
 274                         irq = viper_bit_to_irq(__ffs(pending));
 275                         generic_handle_irq(irq);
 276                 }
 277                 pending = viper_irq_pending();
 278         } while (pending);
 279 }
 280
 281 static struct irq_chip viper_irq_chip = {
 282         .name   = "ISA",
 283         .ack    = viper_ack_irq,
 284         .mask   = viper_mask_irq,
 285         .unmask = viper_unmask_irq
 286 };
 287
 288 static void __init viper_init_irq(void)
 289 {
 290         int level;
 291         int isa_irq;
 292
 293         pxa25x_init_irq();
 294
 295         /* setup ISA IRQs */
 296         for (level = 0; level < ARRAY_SIZE(viper_isa_irqs); level++) {
 297                 isa_irq = viper_bit_to_irq(level);
 298                 set_irq_chip(isa_irq, &viper_irq_chip);
 299                 set_irq_handler(isa_irq, handle_edge_irq);
 300                 set_irq_flags(isa_irq, IRQF_VALID | IRQF_PROBE);
 301         }
 302
 303         set_irq_chained_handler(gpio_to_irq(VIPER_CPLD_GPIO),
 304                                 viper_irq_handler);
 305         set_irq_type(gpio_to_irq(VIPER_CPLD_GPIO), IRQ_TYPE_EDGE_BOTH);
 306
 307 #ifndef CONFIG_SERIAL_PXA
 308         /*
 309          * 8250 doesn't support IRQ_TYPE being passed as part
 310          * of the plat_serial8250_port structure...
 311          */
 312         set_irq_type(gpio_to_irq(VIPER_UARTA_GPIO), IRQ_TYPE_EDGE_RISING);
 313         set_irq_type(gpio_to_irq(VIPER_UARTB_GPIO), IRQ_TYPE_EDGE_RISING);
 314 #endif
 315 }
 316
 317 /* Flat Panel */
 318 static struct pxafb_mode_info fb_mode_info[] = {
 319         {
 320                 .pixclock       = 157500,
 321
 322                 .xres           = 320,
 323                 .yres           = 240,
 324
 325                 .bpp            = 16,
 326
 327                 .hsync_len      = 63,
 328                 .left_margin    = 7,
 329                 .right_margin   = 13,
 330
 331                 .vsync_len      = 20,
 332                 .upper_margin   = 0,
 333                 .lower_margin   = 0,
 334
 335                 .sync           = 0,
 336         },
 337 };
 338
 339 static struct pxafb_mach_info fb_info = {
 340         .modes                  = fb_mode_info,
 341         .num_modes              = 1,
 342         .lcd_conn               = LCD_COLOR_TFT_16BPP | LCD_PCLK_EDGE_FALL,
 343 };
 344
 345 static int viper_backlight_init(struct device *dev)
 346 {
 347         int ret;
 348
 349         /* GPIO9 and 10 control FB backlight. Initialise to off */
 350         ret = gpio_request(VIPER_BCKLIGHT_EN_GPIO, "Backlight");
 351         if (ret)
 352                 goto err_request_bckl;
 353
 354         ret = gpio_request(VIPER_LCD_EN_GPIO, "LCD");
 355         if (ret)
 356                 goto err_request_lcd;
 357
 358         ret = gpio_direction_output(VIPER_BCKLIGHT_EN_GPIO, 0);
 359         if (ret)
 360                 goto err_dir;
 361
 362         ret = gpio_direction_output(VIPER_LCD_EN_GPIO, 0);
 363         if (ret)
 364                 goto err_dir;
 365
 366         return 0;
 367
 368 err_dir:
 369         gpio_free(VIPER_LCD_EN_GPIO);
 370 err_request_lcd:
 371         gpio_free(VIPER_BCKLIGHT_EN_GPIO);
 372 err_request_bckl:
 373         dev_err(dev, "Failed to setup LCD GPIOs\n");
 374
 375         return ret;
 376 }
 377
 378 static int viper_backlight_notify(int brightness)
 379 {
 380         gpio_set_value(VIPER_LCD_EN_GPIO, !!brightness);
 381         gpio_set_value(VIPER_BCKLIGHT_EN_GPIO, !!brightness);
 382
 383         return brightness;
 384 }
 385
 386 static void viper_backlight_exit(struct device *dev)
 387 {
 388         gpio_free(VIPER_LCD_EN_GPIO);
 389         gpio_free(VIPER_BCKLIGHT_EN_GPIO);
 390 }
 391
 392 static struct platform_pwm_backlight_data viper_backlight_data = {
 393         .pwm_id         = 0,
 394         .max_brightness = 100,
 395         .dft_brightness = 100,
 396         .pwm_period_ns  = 1000000,
 397         .init           = viper_backlight_init,
 398         .notify         = viper_backlight_notify,
 399         .exit           = viper_backlight_exit,
 400 };
 401
 402 static struct platform_device viper_backlight_device = {
 403         .name           = "pwm-backlight",
 404         .dev            = {
 405                 .parent         = &pxa25x_device_pwm0.dev,
 406                 .platform_data  = &viper_backlight_data,
 407         },
 408 };
 409
 410 /* Ethernet */
 411 static struct resource smc91x_resources[] = {
 412         [0] = {
 413                 .name   = "smc91x-regs",
 414                 .start  = VIPER_ETH_PHYS + 0x300,
 415                 .end    = VIPER_ETH_PHYS + 0x30f,
 416                 .flags  = IORESOURCE_MEM,
 417         },
 418         [1] = {
 419                 .start  = gpio_to_irq(VIPER_ETH_GPIO),
 420                 .end    = gpio_to_irq(VIPER_ETH_GPIO),
 421                 .flags  = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
 422         },
 423         [2] = {
 424                 .name   = "smc91x-data32",
 425                 .start  = VIPER_ETH_DATA_PHYS,
 426                 .end    = VIPER_ETH_DATA_PHYS + 3,
 427                 .flags  = IORESOURCE_MEM,
 428         },
 429 };
 430
 431 static struct smc91x_platdata viper_smc91x_info = {
 432         .flags  = SMC91X_USE_16BIT | SMC91X_NOWAIT,
 433         .leda   = RPC_LED_100_10,
 434         .ledb   = RPC_LED_TX_RX,
 435 };
 436
 437 static struct platform_device smc91x_device = {
 438         .name           = "smc91x",
 439         .id             = -1,
 440         .num_resources  = ARRAY_SIZE(smc91x_resources),
 441         .resource       = smc91x_resources,
 442         .dev            = {
 443                 .platform_data  = &viper_smc91x_info,
 444         },
 445 };
 446
 447 /* i2c */
 448 static struct i2c_gpio_platform_data i2c_bus_data = {
 449         .sda_pin = VIPER_RTC_I2C_SDA_GPIO,
 450         .scl_pin = VIPER_RTC_I2C_SCL_GPIO,
 451         .udelay  = 10,
 452         .timeout = 100,
 453 };
 454
 455 static struct platform_device i2c_bus_device = {
 456         .name           = "i2c-gpio",
 457         .id             = 1, /* pxa2xx-i2c is bus 0, so start at 1 */
 458         .dev = {
 459                 .platform_data = &i2c_bus_data,
 460         }
 461 };
 462
 463 static struct i2c_board_info __initdata viper_i2c_devices[] = {
 464         {
 465                 I2C_BOARD_INFO("ds1338", 0x68),
 466         },
 467 };
 468
 469 /*
 470  * Serial configuration:
 471  * You can either have the standard PXA ports driven by the PXA driver,
 472  * or all the ports (PXA + 16850) driven by the 8250 driver.
 473  * Choose your poison.
 474  */
 475
 476 static struct resource viper_serial_resources[] = {
 477 #ifndef CONFIG_SERIAL_PXA
 478         {
 479                 .start  = 0x40100000,
 480                 .end    = 0x4010001f,
 481                 .flags  = IORESOURCE_MEM,
 482         },
 483         {
 484                 .start  = 0x40200000,
 485                 .end    = 0x4020001f,
 486                 .flags  = IORESOURCE_MEM,
 487         },
 488         {
 489                 .start  = 0x40700000,
 490                 .end    = 0x4070001f,
 491                 .flags  = IORESOURCE_MEM,
 492         },
 493         {
 494                 .start  = VIPER_UARTA_PHYS,
 495                 .end    = VIPER_UARTA_PHYS + 0xf,
 496                 .flags  = IORESOURCE_MEM,
 497         },
 498         {
 499                 .start  = VIPER_UARTB_PHYS,
 500                 .end    = VIPER_UARTB_PHYS + 0xf,
 501                 .flags  = IORESOURCE_MEM,
 502         },
 503 #else
 504         {
 505                 0,
 506         },
 507 #endif
 508 };
 509
 510 static struct plat_serial8250_port serial_platform_data[] = {
 511 #ifndef CONFIG_SERIAL_PXA
 512         /* Internal UARTs */
 513         {
 514                 .membase        = (void *)&FFUART,
 515                 .mapbase        = __PREG(FFUART),
 516                 .irq            = IRQ_FFUART,
 517                 .uartclk        = 921600 * 16,
 518                 .regshift       = 2,
 519                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
 520                 .iotype         = UPIO_MEM,
 521         },
 522         {
 523                 .membase        = (void *)&BTUART,
 524                 .mapbase        = __PREG(BTUART),
 525                 .irq            = IRQ_BTUART,
 526                 .uartclk        = 921600 * 16,
 527                 .regshift       = 2,
 528                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
 529                 .iotype         = UPIO_MEM,
 530         },
 531         {
 532                 .membase        = (void *)&STUART,
 533                 .mapbase        = __PREG(STUART),
 534                 .irq            = IRQ_STUART,
 535                 .uartclk        = 921600 * 16,
 536                 .regshift       = 2,
 537                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
 538                 .iotype         = UPIO_MEM,
 539         },
 540         /* External UARTs */
 541         {
 542                 .mapbase        = VIPER_UARTA_PHYS,
 543                 .irq            = gpio_to_irq(VIPER_UARTA_GPIO),
 544                 .uartclk        = 1843200,
 545                 .regshift       = 1,
 546                 .iotype         = UPIO_MEM,
 547                 .flags          = UPF_BOOT_AUTOCONF | UPF_IOREMAP |
 548                                   UPF_SKIP_TEST,
 549         },
 550         {
 551                 .mapbase        = VIPER_UARTB_PHYS,
 552                 .irq            = gpio_to_irq(VIPER_UARTB_GPIO),
 553                 .uartclk        = 1843200,
 554                 .regshift       = 1,
 555                 .iotype         = UPIO_MEM,
 556                 .flags          = UPF_BOOT_AUTOCONF | UPF_IOREMAP |
 557                                   UPF_SKIP_TEST,
 558         },
 559 #endif
 560         { },
 561 };
 562
 563 static struct platform_device serial_device = {
 564         .name                   = "serial8250",
 565         .id                     = 0,
 566         .dev                    = {
 567                 .platform_data  = serial_platform_data,
 568         },
 569         .num_resources          = ARRAY_SIZE(viper_serial_resources),
 570         .resource               = viper_serial_resources,
 571 };
 572
 573 /* USB */
 574 static void isp116x_delay(struct device *dev, int delay)
 575 {
 576         ndelay(delay);
 577 }
 578
 579 static struct resource isp116x_resources[] = {
 580         [0] = { /* DATA */
 581                 .start  = VIPER_USB_PHYS + 0,
 582                 .end    = VIPER_USB_PHYS + 1,
 583                 .flags  = IORESOURCE_MEM,
 584         },
 585         [1] = { /* ADDR */
 586                 .start  = VIPER_USB_PHYS + 2,
 587                 .end    = VIPER_USB_PHYS + 3,
 588                 .flags  = IORESOURCE_MEM,
 589         },
 590         [2] = {
 591                 .start  = gpio_to_irq(VIPER_USB_GPIO),
 592                 .end    = gpio_to_irq(VIPER_USB_GPIO),
 593                 .flags  = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
 594         },
 595 };
 596
 597 /* (DataBusWidth16|AnalogOCEnable|DREQOutputPolarity|DownstreamPort15KRSel ) */
 598 static struct isp116x_platform_data isp116x_platform_data = {
 599         /* Enable internal resistors on downstream ports */
 600         .sel15Kres              = 1,
 601         /* On-chip overcurrent protection */
 602         .oc_enable              = 1,
 603         /* INT output polarity */
 604         .int_act_high           = 1,
 605         /* INT edge or level triggered */
 606         .int_edge_triggered     = 0,
 607
 608         /* WAKEUP pin connected - NOT SUPPORTED  */
 609         /* .remote_wakeup_connected = 0, */
 610         /* Wakeup by devices on usb bus enabled */
 611         .remote_wakeup_enable   = 0,
 612         .delay                  = isp116x_delay,
 613 };
 614
 615 static struct platform_device isp116x_device = {
 616         .name                   = "isp116x-hcd",
 617         .id                     = -1,
 618         .num_resources          = ARRAY_SIZE(isp116x_resources),
 619         .resource               = isp116x_resources,
 620         .dev                    = {
 621                 .platform_data  = &isp116x_platform_data,
 622         },
 623
 624 };
 625
 626 /* MTD */
 627 static struct resource mtd_resources[] = {
 628         [0] = { /* RedBoot config + filesystem flash */
 629                 .start  = VIPER_FLASH_PHYS,
 630                 .end    = VIPER_FLASH_PHYS + SZ_32M - 1,
 631                 .flags  = IORESOURCE_MEM,
 632         },
 633         [1] = { /* Boot flash */
 634                 .start  = VIPER_BOOT_PHYS,
 635                 .end    = VIPER_BOOT_PHYS + SZ_1M - 1,
 636                 .flags  = IORESOURCE_MEM,
 637         },
 638         [2] = { /*
 639                  * SRAM size is actually 256KB, 8bits, with a sparse mapping
 640                  * (each byte is on a 16bit boundary).
 641                  */
 642                 .start  = _VIPER_SRAM_BASE,
 643                 .end    = _VIPER_SRAM_BASE + SZ_512K - 1,
 644                 .flags  = IORESOURCE_MEM,
 645         },
 646 };
 647
 648 static struct mtd_partition viper_boot_flash_partition = {
 649         .name           = "RedBoot",
 650         .size           = SZ_1M,
 651         .offset         = 0,
 652         .mask_flags     = MTD_WRITEABLE,        /* force R/O */
 653 };
 654
 655 static struct physmap_flash_data viper_flash_data[] = {
 656         [0] = {
 657                 .width          = 2,
 658                 .parts          = NULL,
 659                 .nr_parts       = 0,
 660         },
 661         [1] = {
 662                 .width          = 2,
 663                 .parts          = &viper_boot_flash_partition,
 664                 .nr_parts       = 1,
 665         },
 666 };
 667
 668 static struct platform_device viper_mtd_devices[] = {
 669         [0] = {
 670                 .name           = "physmap-flash",
 671                 .id             = 0,
 672                 .dev            = {
 673                         .platform_data  = &viper_flash_data[0],
 674                 },
 675                 .resource       = &mtd_resources[0],
 676                 .num_resources  = 1,
 677         },
 678         [1] = {
 679                 .name           = "physmap-flash",
 680                 .id             = 1,
 681                 .dev            = {
 682                         .platform_data  = &viper_flash_data[1],
 683                 },
 684                 .resource       = &mtd_resources[1],
 685                 .num_resources  = 1,
 686         },
 687 };
 688
 689 static struct platform_device *viper_devs[] __initdata = {
 690         &smc91x_device,
 691         &i2c_bus_device,
 692         &serial_device,
 693         &isp116x_device,
 694         &viper_mtd_devices[0],
 695         &viper_mtd_devices[1],
 696         &viper_backlight_device,
 697 };
 698
 699 static mfp_cfg_t viper_pin_config[] __initdata = {
 700         /* Chip selects */
 701         GPIO15_nCS_1,
 702         GPIO78_nCS_2,
 703         GPIO79_nCS_3,
 704         GPIO80_nCS_4,
 705         GPIO33_nCS_5,
 706
 707         /* FP Backlight */
 708         GPIO9_GPIO,                             /* VIPER_BCKLIGHT_EN_GPIO */
 709         GPIO10_GPIO,                            /* VIPER_LCD_EN_GPIO */
 710         GPIO16_PWM0_OUT,
 711
 712         /* Ethernet PHY Ready */
 713         GPIO18_RDY,
 714
 715         /* Serial shutdown */
 716         GPIO12_GPIO | MFP_LPM_DRIVE_HIGH,       /* VIPER_UART_SHDN_GPIO */
 717
 718         /* Compact-Flash / PC104 */
 719         GPIO48_nPOE,
 720         GPIO49_nPWE,
 721         GPIO50_nPIOR,
 722         GPIO51_nPIOW,
 723         GPIO52_nPCE_1,
 724         GPIO53_nPCE_2,
 725         GPIO54_nPSKTSEL,
 726         GPIO55_nPREG,
 727         GPIO56_nPWAIT,
 728         GPIO57_nIOIS16,
 729         GPIO8_GPIO,                             /* VIPER_CF_RDY_GPIO */
 730         GPIO32_GPIO,                            /* VIPER_CF_CD_GPIO */
 731         GPIO82_GPIO,                            /* VIPER_CF_POWER_GPIO */
 732
 733         /* Integrated UPS control */
 734         GPIO20_GPIO,                            /* VIPER_UPS_GPIO */
 735
 736         /* Vcc regulator control */
 737         GPIO6_GPIO,                             /* VIPER_PSU_DATA_GPIO */
 738         GPIO11_GPIO,                            /* VIPER_PSU_CLK_GPIO */
 739         GPIO19_GPIO,                            /* VIPER_PSU_nCS_LD_GPIO */
 740
 741         /* i2c busses */
 742         GPIO26_GPIO,                            /* VIPER_TPM_I2C_SDA_GPIO */
 743         GPIO27_GPIO,                            /* VIPER_TPM_I2C_SCL_GPIO */
 744         GPIO83_GPIO,                            /* VIPER_RTC_I2C_SDA_GPIO */
 745         GPIO84_GPIO,                            /* VIPER_RTC_I2C_SCL_GPIO */
 746
 747         /* PC/104 Interrupt */
 748         GPIO1_GPIO | WAKEUP_ON_EDGE_RISE,       /* VIPER_CPLD_GPIO */
 749 };
 750
 751 static unsigned long viper_tpm;
 752
 753 static int __init viper_tpm_setup(char *str)
 754 {
 755         strict_strtoul(str, 10, &viper_tpm);
 756         return 1;
 757 }
 758
 759 __setup("tpm=", viper_tpm_setup);
 760
 761 static void __init viper_tpm_init(void)
 762 {
 763         struct platform_device *tpm_device;
 764         struct i2c_gpio_platform_data i2c_tpm_data = {
 765                 .sda_pin = VIPER_TPM_I2C_SDA_GPIO,
 766                 .scl_pin = VIPER_TPM_I2C_SCL_GPIO,
 767                 .udelay  = 10,
 768                 .timeout = 100,
 769         };
 770         char *errstr;
 771
 772         /* Allocate TPM i2c bus if requested */
 773         if (!viper_tpm)
 774                 return;
 775
 776         tpm_device = platform_device_alloc("i2c-gpio", 2);
 777         if (tpm_device) {
 778                 if (!platform_device_add_data(tpm_device,
 779                                               &i2c_tpm_data,
 780                                               sizeof(i2c_tpm_data))) {
 781                         if (platform_device_add(tpm_device)) {
 782                                 errstr = "register TPM i2c bus";
 783                                 goto error_free_tpm;
 784                         }
 785                 } else {
 786                         errstr = "allocate TPM i2c bus data";
 787                         goto error_free_tpm;
 788                 }
 789         } else {
 790                 errstr = "allocate TPM i2c device";
 791                 goto error_tpm;
 792         }
 793
 794         return;
 795
 796 error_free_tpm:
 797         kfree(tpm_device);
 798 error_tpm:
 799         pr_err("viper: Couldn't %s, giving up\n", errstr);
 800 }
 801
 802 static void __init viper_init_vcore_gpios(void)
 803 {
 804         if (gpio_request(VIPER_PSU_DATA_GPIO, "PSU data"))
 805                 goto err_request_data;
 806
 807         if (gpio_request(VIPER_PSU_CLK_GPIO, "PSU clock"))
 808                 goto err_request_clk;
 809
 810         if (gpio_request(VIPER_PSU_nCS_LD_GPIO, "PSU cs"))
 811                 goto err_request_cs;
 812
 813         if (gpio_direction_output(VIPER_PSU_DATA_GPIO, 0) ||
 814             gpio_direction_output(VIPER_PSU_CLK_GPIO, 0) ||
 815             gpio_direction_output(VIPER_PSU_nCS_LD_GPIO, 0))
 816                 goto err_dir;
 817
 818         /* c/should assume redboot set the correct level ??? */
 819         viper_set_core_cpu_voltage(get_clk_frequency_khz(0), 1);
 820
 821         return;
 822
 823 err_dir:
 824         gpio_free(VIPER_PSU_nCS_LD_GPIO);
 825 err_request_cs:
 826         gpio_free(VIPER_PSU_CLK_GPIO);
 827 err_request_clk:
 828         gpio_free(VIPER_PSU_DATA_GPIO);
 829 err_request_data:
 830         pr_err("viper: Failed to setup vcore control GPIOs\n");
 831 }
 832
 833 static void __init viper_init_serial_gpio(void)
 834 {
 835         if (gpio_request(VIPER_UART_SHDN_GPIO, "UARTs shutdown"))
 836                 goto err_request;
 837
 838         if (gpio_direction_output(VIPER_UART_SHDN_GPIO, 0))
 839                 goto err_dir;
 840
 841         return;
 842
 843 err_dir:
 844         gpio_free(VIPER_UART_SHDN_GPIO);
 845 err_request:
 846         pr_err("viper: Failed to setup UART shutdown GPIO\n");
 847 }
 848
 849 #ifdef CONFIG_CPU_FREQ
 850 static int viper_cpufreq_notifier(struct notifier_block *nb,
 851                                   unsigned long val, void *data)
 852 {
 853         struct cpufreq_freqs *freq = data;
 854
 855         /* TODO: Adjust timings??? */
 856
 857         switch (val) {
 858         case CPUFREQ_PRECHANGE:
 859                 if (freq->old < freq->new) {
 860                         /* we are getting faster so raise the voltage
 861                          * before we change freq */
 862                         viper_set_core_cpu_voltage(freq->new, 0);
 863                 }
 864                 break;
 865         case CPUFREQ_POSTCHANGE:
 866                 if (freq->old > freq->new) {
 867                         /* we are slowing down so drop the power
 868                          * after we change freq */
 869                         viper_set_core_cpu_voltage(freq->new, 0);
 870                 }
 871                 break;
 872         case CPUFREQ_RESUMECHANGE:
 873                 viper_set_core_cpu_voltage(freq->new, 0);
 874                 break;
 875         default:
 876                 /* ignore */
 877                 break;
 878         }
 879
 880         return 0;
 881 }
 882
 883 static struct notifier_block viper_cpufreq_notifier_block = {
 884         .notifier_call  = viper_cpufreq_notifier
 885 };
 886
 887 static void __init viper_init_cpufreq(void)
 888 {
 889         if (cpufreq_register_notifier(&viper_cpufreq_notifier_block,
 890                                       CPUFREQ_TRANSITION_NOTIFIER))
 891                 pr_err("viper: Failed to setup cpufreq notifier\n");
 892 }
 893 #else
 894 static inline void viper_init_cpufreq(void) {}
 895 #endif
 896
 897 static void viper_power_off(void)
 898 {
 899         pr_notice("Shutting off UPS\n");
 900         gpio_set_value(VIPER_UPS_GPIO, 1);
 901         /* Spin to death... */
 902         while (1);
 903 }
 904
 905 static void __init viper_init(void)
 906 {
 907         u8 version;
 908
 909         pm_power_off = viper_power_off;
 910
 911         pxa2xx_mfp_config(ARRAY_AND_SIZE(viper_pin_config));
 912
 913         /* Wake-up serial console */
 914         viper_init_serial_gpio();
 915
 916         set_pxa_fb_info(&fb_info);
 917
 918         /* v1 hardware cannot use the datacs line */
 919         version = viper_hw_version();
 920         if (version == 0)
 921                 smc91x_device.num_resources--;
 922
 923         pxa_set_i2c_info(NULL);
 924         platform_add_devices(viper_devs, ARRAY_SIZE(viper_devs));
 925
 926         viper_init_vcore_gpios();
 927         viper_init_cpufreq();
 928
 929         sysdev_driver_register(&cpu_sysdev_class, &viper_cpu_sysdev_driver);
 930
 931         if (version) {
 932                 pr_info("viper: hardware v%di%d detected. "
 933                         "CPLD revision %d.\n",
 934                         VIPER_BOARD_VERSION(version),
 935                         VIPER_BOARD_ISSUE(version),
 936                         VIPER_CPLD_REVISION(version));
 937                 system_rev = (VIPER_BOARD_VERSION(version) << 8) |
 938                              (VIPER_BOARD_ISSUE(version) << 4) |
 939                              VIPER_CPLD_REVISION(version);
 940         } else {
 941                 pr_info("viper: No version register.\n");
 942         }
 943
 944         i2c_register_board_info(1, ARRAY_AND_SIZE(viper_i2c_devices));
 945
 946         viper_tpm_init();
 947         pxa_set_ac97_info(NULL);
 948 }
 949
 950 static struct map_desc viper_io_desc[] __initdata = {
 951         {
 952                 .virtual = VIPER_CPLD_BASE,
 953                 .pfn     = __phys_to_pfn(VIPER_CPLD_PHYS),
 954                 .length  = 0x00300000,
 955                 .type    = MT_DEVICE,
 956         },
 957         {
 958                 .virtual = VIPER_PC104IO_BASE,
 959                 .pfn     = __phys_to_pfn(_PCMCIA1IO),
 960                 .length  = 0x00800000,
 961                 .type    = MT_DEVICE,
 962         },
 963 };
 964
 965 static void __init viper_map_io(void)
 966 {
 967         pxa_map_io();
 968
 969         iotable_init(viper_io_desc, ARRAY_SIZE(viper_io_desc));
 970
 971         PCFR |= PCFR_OPDE;
 972 }
 973
 974 MACHINE_START(VIPER, "Arcom/Eurotech VIPER SBC")
 975         /* Maintainer: Marc Zyngier <maz@misterjones.org> */
 976         .phys_io        = 0x40000000,
 977         .io_pg_offst    = (io_p2v(0x40000000) >> 18) & 0xfffc,
 978         .boot_params    = 0xa0000100,
 979         .map_io         = viper_map_io,
 980         .init_irq       = viper_init_irq,
 981         .timer          = &pxa_timer,
 982         .init_machine   = viper_init,
 983 MACHINE_END