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 <mach/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 #ifndef CONFIG_SERIAL_PXA
 306         /*
 307          * 8250 doesn't support IRQ_TYPE being passed as part
 308          * of the plat_serial8250_port structure...
 309          */
 310         set_irq_type(gpio_to_irq(VIPER_UARTA_GPIO), IRQ_TYPE_EDGE_RISING);
 311         set_irq_type(gpio_to_irq(VIPER_UARTB_GPIO), IRQ_TYPE_EDGE_RISING);
 312 #endif
 313 }
 314
 315 /* Flat Panel */
 316 static struct pxafb_mode_info fb_mode_info[] = {
 317         {
 318                 .pixclock       = 157500,
 319
 320                 .xres           = 320,
 321                 .yres           = 240,
 322
 323                 .bpp            = 16,
 324
 325                 .hsync_len      = 63,
 326                 .left_margin    = 7,
 327                 .right_margin   = 13,
 328
 329                 .vsync_len      = 20,
 330                 .upper_margin   = 0,
 331                 .lower_margin   = 0,
 332
 333                 .sync           = 0,
 334         },
 335 };
 336
 337 static struct pxafb_mach_info fb_info = {
 338         .modes                  = fb_mode_info,
 339         .num_modes              = 1,
 340         .lcd_conn               = LCD_COLOR_TFT_16BPP | LCD_PCLK_EDGE_FALL,
 341 };
 342
 343 static int viper_backlight_init(struct device *dev)
 344 {
 345         int ret;
 346
 347         /* GPIO9 and 10 control FB backlight. Initialise to off */
 348         ret = gpio_request(VIPER_BCKLIGHT_EN_GPIO, "Backlight");
 349         if (ret)
 350                 goto err_request_bckl;
 351
 352         ret = gpio_request(VIPER_LCD_EN_GPIO, "LCD");
 353         if (ret)
 354                 goto err_request_lcd;
 355
 356         ret = gpio_direction_output(VIPER_BCKLIGHT_EN_GPIO, 0);
 357         if (ret)
 358                 goto err_dir;
 359
 360         ret = gpio_direction_output(VIPER_LCD_EN_GPIO, 0);
 361         if (ret)
 362                 goto err_dir;
 363
 364         return 0;
 365
 366 err_dir:
 367         gpio_free(VIPER_LCD_EN_GPIO);
 368 err_request_lcd:
 369         gpio_free(VIPER_BCKLIGHT_EN_GPIO);
 370 err_request_bckl:
 371         dev_err(dev, "Failed to setup LCD GPIOs\n");
 372
 373         return ret;
 374 }
 375
 376 static int viper_backlight_notify(int brightness)
 377 {
 378         gpio_set_value(VIPER_LCD_EN_GPIO, !!brightness);
 379         gpio_set_value(VIPER_BCKLIGHT_EN_GPIO, !!brightness);
 380
 381         return brightness;
 382 }
 383
 384 static void viper_backlight_exit(struct device *dev)
 385 {
 386         gpio_free(VIPER_LCD_EN_GPIO);
 387         gpio_free(VIPER_BCKLIGHT_EN_GPIO);
 388 }
 389
 390 static struct platform_pwm_backlight_data viper_backlight_data = {
 391         .pwm_id         = 0,
 392         .max_brightness = 100,
 393         .dft_brightness = 100,
 394         .pwm_period_ns  = 1000000,
 395         .init           = viper_backlight_init,
 396         .notify         = viper_backlight_notify,
 397         .exit           = viper_backlight_exit,
 398 };
 399
 400 static struct platform_device viper_backlight_device = {
 401         .name           = "pwm-backlight",
 402         .dev            = {
 403                 .parent         = &pxa25x_device_pwm0.dev,
 404                 .platform_data  = &viper_backlight_data,
 405         },
 406 };
 407
 408 /* Ethernet */
 409 static struct resource smc91x_resources[] = {
 410         [0] = {
 411                 .name   = "smc91x-regs",
 412                 .start  = VIPER_ETH_PHYS + 0x300,
 413                 .end    = VIPER_ETH_PHYS + 0x30f,
 414                 .flags  = IORESOURCE_MEM,
 415         },
 416         [1] = {
 417                 .start  = gpio_to_irq(VIPER_ETH_GPIO),
 418                 .end    = gpio_to_irq(VIPER_ETH_GPIO),
 419                 .flags  = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
 420         },
 421         [2] = {
 422                 .name   = "smc91x-data32",
 423                 .start  = VIPER_ETH_DATA_PHYS,
 424                 .end    = VIPER_ETH_DATA_PHYS + 3,
 425                 .flags  = IORESOURCE_MEM,
 426         },
 427 };
 428
 429 static struct smc91x_platdata viper_smc91x_info = {
 430         .flags  = SMC91X_USE_16BIT | SMC91X_NOWAIT,
 431         .leda   = RPC_LED_100_10,
 432         .ledb   = RPC_LED_TX_RX,
 433 };
 434
 435 static struct platform_device smc91x_device = {
 436         .name           = "smc91x",
 437         .id             = -1,
 438         .num_resources  = ARRAY_SIZE(smc91x_resources),
 439         .resource       = smc91x_resources,
 440         .dev            = {
 441                 .platform_data  = &viper_smc91x_info,
 442         },
 443 };
 444
 445 /* i2c */
 446 static struct i2c_gpio_platform_data i2c_bus_data = {
 447         .sda_pin = VIPER_RTC_I2C_SDA_GPIO,
 448         .scl_pin = VIPER_RTC_I2C_SCL_GPIO,
 449         .udelay  = 10,
 450         .timeout = 100,
 451 };
 452
 453 static struct platform_device i2c_bus_device = {
 454         .name           = "i2c-gpio",
 455         .id             = 1, /* pxa2xx-i2c is bus 0, so start at 1 */
 456         .dev = {
 457                 .platform_data = &i2c_bus_data,
 458         }
 459 };
 460
 461 static struct i2c_board_info __initdata viper_i2c_devices[] = {
 462         {
 463                 I2C_BOARD_INFO("ds1338", 0x68),
 464         },
 465 };
 466
 467 /*
 468  * Serial configuration:
 469  * You can either have the standard PXA ports driven by the PXA driver,
 470  * or all the ports (PXA + 16850) driven by the 8250 driver.
 471  * Choose your poison.
 472  */
 473
 474 static struct resource viper_serial_resources[] = {
 475 #ifndef CONFIG_SERIAL_PXA
 476         {
 477                 .start  = 0x40100000,
 478                 .end    = 0x4010001f,
 479                 .flags  = IORESOURCE_MEM,
 480         },
 481         {
 482                 .start  = 0x40200000,
 483                 .end    = 0x4020001f,
 484                 .flags  = IORESOURCE_MEM,
 485         },
 486         {
 487                 .start  = 0x40700000,
 488                 .end    = 0x4070001f,
 489                 .flags  = IORESOURCE_MEM,
 490         },
 491         {
 492                 .start  = VIPER_UARTA_PHYS,
 493                 .end    = VIPER_UARTA_PHYS + 0xf,
 494                 .flags  = IORESOURCE_MEM,
 495         },
 496         {
 497                 .start  = VIPER_UARTB_PHYS,
 498                 .end    = VIPER_UARTB_PHYS + 0xf,
 499                 .flags  = IORESOURCE_MEM,
 500         },
 501 #else
 502         {
 503                 0,
 504         },
 505 #endif
 506 };
 507
 508 static struct plat_serial8250_port serial_platform_data[] = {
 509 #ifndef CONFIG_SERIAL_PXA
 510         /* Internal UARTs */
 511         {
 512                 .membase        = (void *)&FFUART,
 513                 .mapbase        = __PREG(FFUART),
 514                 .irq            = IRQ_FFUART,
 515                 .uartclk        = 921600 * 16,
 516                 .regshift       = 2,
 517                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
 518                 .iotype         = UPIO_MEM,
 519         },
 520         {
 521                 .membase        = (void *)&BTUART,
 522                 .mapbase        = __PREG(BTUART),
 523                 .irq            = IRQ_BTUART,
 524                 .uartclk        = 921600 * 16,
 525                 .regshift       = 2,
 526                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
 527                 .iotype         = UPIO_MEM,
 528         },
 529         {
 530                 .membase        = (void *)&STUART,
 531                 .mapbase        = __PREG(STUART),
 532                 .irq            = IRQ_STUART,
 533                 .uartclk        = 921600 * 16,
 534                 .regshift       = 2,
 535                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
 536                 .iotype         = UPIO_MEM,
 537         },
 538         /* External UARTs */
 539         {
 540                 .mapbase        = VIPER_UARTA_PHYS,
 541                 .irq            = gpio_to_irq(VIPER_UARTA_GPIO),
 542                 .uartclk        = 1843200,
 543                 .regshift       = 1,
 544                 .iotype         = UPIO_MEM,
 545                 .flags          = UPF_BOOT_AUTOCONF | UPF_IOREMAP |
 546                                   UPF_SKIP_TEST,
 547         },
 548         {
 549                 .mapbase        = VIPER_UARTB_PHYS,
 550                 .irq            = gpio_to_irq(VIPER_UARTB_GPIO),
 551                 .uartclk        = 1843200,
 552                 .regshift       = 1,
 553                 .iotype         = UPIO_MEM,
 554                 .flags          = UPF_BOOT_AUTOCONF | UPF_IOREMAP |
 555                                   UPF_SKIP_TEST,
 556         },
 557 #endif
 558         { },
 559 };
 560
 561 static struct platform_device serial_device = {
 562         .name                   = "serial8250",
 563         .id                     = 0,
 564         .dev                    = {
 565                 .platform_data  = serial_platform_data,
 566         },
 567         .num_resources          = ARRAY_SIZE(viper_serial_resources),
 568         .resource               = viper_serial_resources,
 569 };
 570
 571 /* USB */
 572 static void isp116x_delay(struct device *dev, int delay)
 573 {
 574         ndelay(delay);
 575 }
 576
 577 static struct resource isp116x_resources[] = {
 578         [0] = { /* DATA */
 579                 .start  = VIPER_USB_PHYS + 0,
 580                 .end    = VIPER_USB_PHYS + 1,
 581                 .flags  = IORESOURCE_MEM,
 582         },
 583         [1] = { /* ADDR */
 584                 .start  = VIPER_USB_PHYS + 2,
 585                 .end    = VIPER_USB_PHYS + 3,
 586                 .flags  = IORESOURCE_MEM,
 587         },
 588         [2] = {
 589                 .start  = gpio_to_irq(VIPER_USB_GPIO),
 590                 .end    = gpio_to_irq(VIPER_USB_GPIO),
 591                 .flags  = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
 592         },
 593 };
 594
 595 /* (DataBusWidth16|AnalogOCEnable|DREQOutputPolarity|DownstreamPort15KRSel ) */
 596 static struct isp116x_platform_data isp116x_platform_data = {
 597         /* Enable internal resistors on downstream ports */
 598         .sel15Kres              = 1,
 599         /* On-chip overcurrent protection */
 600         .oc_enable              = 1,
 601         /* INT output polarity */
 602         .int_act_high           = 1,
 603         /* INT edge or level triggered */
 604         .int_edge_triggered     = 0,
 605
 606         /* WAKEUP pin connected - NOT SUPPORTED  */
 607         /* .remote_wakeup_connected = 0, */
 608         /* Wakeup by devices on usb bus enabled */
 609         .remote_wakeup_enable   = 0,
 610         .delay                  = isp116x_delay,
 611 };
 612
 613 static struct platform_device isp116x_device = {
 614         .name                   = "isp116x-hcd",
 615         .id                     = -1,
 616         .num_resources          = ARRAY_SIZE(isp116x_resources),
 617         .resource               = isp116x_resources,
 618         .dev                    = {
 619                 .platform_data  = &isp116x_platform_data,
 620         },
 621
 622 };
 623
 624 /* MTD */
 625 static struct resource mtd_resources[] = {
 626         [0] = { /* RedBoot config + filesystem flash */
 627                 .start  = VIPER_FLASH_PHYS,
 628                 .end    = VIPER_FLASH_PHYS + SZ_32M - 1,
 629                 .flags  = IORESOURCE_MEM,
 630         },
 631         [1] = { /* Boot flash */
 632                 .start  = VIPER_BOOT_PHYS,
 633                 .end    = VIPER_BOOT_PHYS + SZ_1M - 1,
 634                 .flags  = IORESOURCE_MEM,
 635         },
 636         [2] = { /*
 637                  * SRAM size is actually 256KB, 8bits, with a sparse mapping
 638                  * (each byte is on a 16bit boundary).
 639                  */
 640                 .start  = _VIPER_SRAM_BASE,
 641                 .end    = _VIPER_SRAM_BASE + SZ_512K - 1,
 642                 .flags  = IORESOURCE_MEM,
 643         },
 644 };
 645
 646 static struct mtd_partition viper_boot_flash_partition = {
 647         .name           = "RedBoot",
 648         .size           = SZ_1M,
 649         .offset         = 0,
 650         .mask_flags     = MTD_WRITEABLE,        /* force R/O */
 651 };
 652
 653 static struct physmap_flash_data viper_flash_data[] = {
 654         [0] = {
 655                 .width          = 2,
 656                 .parts          = NULL,
 657                 .nr_parts       = 0,
 658         },
 659         [1] = {
 660                 .width          = 2,
 661                 .parts          = &viper_boot_flash_partition,
 662                 .nr_parts       = 1,
 663         },
 664 };
 665
 666 static struct platform_device viper_mtd_devices[] = {
 667         [0] = {
 668                 .name           = "physmap-flash",
 669                 .id             = 0,
 670                 .dev            = {
 671                         .platform_data  = &viper_flash_data[0],
 672                 },
 673                 .resource       = &mtd_resources[0],
 674                 .num_resources  = 1,
 675         },
 676         [1] = {
 677                 .name           = "physmap-flash",
 678                 .id             = 1,
 679                 .dev            = {
 680                         .platform_data  = &viper_flash_data[1],
 681                 },
 682                 .resource       = &mtd_resources[1],
 683                 .num_resources  = 1,
 684         },
 685 };
 686
 687 static struct platform_device *viper_devs[] __initdata = {
 688         &smc91x_device,
 689         &i2c_bus_device,
 690         &serial_device,
 691         &isp116x_device,
 692         &viper_mtd_devices[0],
 693         &viper_mtd_devices[1],
 694         &viper_backlight_device,
 695 };
 696
 697 static mfp_cfg_t viper_pin_config[] __initdata = {
 698         /* Chip selects */
 699         GPIO15_nCS_1,
 700         GPIO78_nCS_2,
 701         GPIO79_nCS_3,
 702         GPIO80_nCS_4,
 703         GPIO33_nCS_5,
 704
 705         /* FP Backlight */
 706         GPIO9_GPIO,                             /* VIPER_BCKLIGHT_EN_GPIO */
 707         GPIO10_GPIO,                            /* VIPER_LCD_EN_GPIO */
 708         GPIO16_PWM0_OUT,
 709
 710         /* Ethernet PHY Ready */
 711         GPIO18_RDY,
 712
 713         /* Serial shutdown */
 714         GPIO12_GPIO | MFP_LPM_DRIVE_HIGH,       /* VIPER_UART_SHDN_GPIO */
 715
 716         /* Compact-Flash / PC104 */
 717         GPIO48_nPOE,
 718         GPIO49_nPWE,
 719         GPIO50_nPIOR,
 720         GPIO51_nPIOW,
 721         GPIO52_nPCE_1,
 722         GPIO53_nPCE_2,
 723         GPIO54_nPSKTSEL,
 724         GPIO55_nPREG,
 725         GPIO56_nPWAIT,
 726         GPIO57_nIOIS16,
 727         GPIO8_GPIO,                             /* VIPER_CF_RDY_GPIO */
 728         GPIO32_GPIO,                            /* VIPER_CF_CD_GPIO */
 729         GPIO82_GPIO,                            /* VIPER_CF_POWER_GPIO */
 730
 731         /* Integrated UPS control */
 732         GPIO20_GPIO,                            /* VIPER_UPS_GPIO */
 733
 734         /* Vcc regulator control */
 735         GPIO6_GPIO,                             /* VIPER_PSU_DATA_GPIO */
 736         GPIO11_GPIO,                            /* VIPER_PSU_CLK_GPIO */
 737         GPIO19_GPIO,                            /* VIPER_PSU_nCS_LD_GPIO */
 738
 739         /* i2c busses */
 740         GPIO26_GPIO,                            /* VIPER_TPM_I2C_SDA_GPIO */
 741         GPIO27_GPIO,                            /* VIPER_TPM_I2C_SCL_GPIO */
 742         GPIO83_GPIO,                            /* VIPER_RTC_I2C_SDA_GPIO */
 743         GPIO84_GPIO,                            /* VIPER_RTC_I2C_SCL_GPIO */
 744
 745         /* PC/104 Interrupt */
 746         GPIO1_GPIO | WAKEUP_ON_EDGE_RISE,       /* VIPER_CPLD_GPIO */
 747 };
 748
 749 static unsigned long viper_tpm;
 750
 751 static int __init viper_tpm_setup(char *str)
 752 {
 753         strict_strtoul(str, 10, &viper_tpm);
 754         return 1;
 755 }
 756
 757 __setup("tpm=", viper_tpm_setup);
 758
 759 static void __init viper_tpm_init(void)
 760 {
 761         struct platform_device *tpm_device;
 762         struct i2c_gpio_platform_data i2c_tpm_data = {
 763                 .sda_pin = VIPER_TPM_I2C_SDA_GPIO,
 764                 .scl_pin = VIPER_TPM_I2C_SCL_GPIO,
 765                 .udelay  = 10,
 766                 .timeout = 100,
 767         };
 768         char *errstr;
 769
 770         /* Allocate TPM i2c bus if requested */
 771         if (!viper_tpm)
 772                 return;
 773
 774         tpm_device = platform_device_alloc("i2c-gpio", 2);
 775         if (tpm_device) {
 776                 if (!platform_device_add_data(tpm_device,
 777                                               &i2c_tpm_data,
 778                                               sizeof(i2c_tpm_data))) {
 779                         if (platform_device_add(tpm_device)) {
 780                                 errstr = "register TPM i2c bus";
 781                                 goto error_free_tpm;
 782                         }
 783                 } else {
 784                         errstr = "allocate TPM i2c bus data";
 785                         goto error_free_tpm;
 786                 }
 787         } else {
 788                 errstr = "allocate TPM i2c device";
 789                 goto error_tpm;
 790         }
 791
 792         return;
 793
 794 error_free_tpm:
 795         kfree(tpm_device);
 796 error_tpm:
 797         pr_err("viper: Couldn't %s, giving up\n", errstr);
 798 }
 799
 800 static void __init viper_init_vcore_gpios(void)
 801 {
 802         if (gpio_request(VIPER_PSU_DATA_GPIO, "PSU data"))
 803                 goto err_request_data;
 804
 805         if (gpio_request(VIPER_PSU_CLK_GPIO, "PSU clock"))
 806                 goto err_request_clk;
 807
 808         if (gpio_request(VIPER_PSU_nCS_LD_GPIO, "PSU cs"))
 809                 goto err_request_cs;
 810
 811         if (gpio_direction_output(VIPER_PSU_DATA_GPIO, 0) ||
 812             gpio_direction_output(VIPER_PSU_CLK_GPIO, 0) ||
 813             gpio_direction_output(VIPER_PSU_nCS_LD_GPIO, 0))
 814                 goto err_dir;
 815
 816         /* c/should assume redboot set the correct level ??? */
 817         viper_set_core_cpu_voltage(get_clk_frequency_khz(0), 1);
 818
 819         return;
 820
 821 err_dir:
 822         gpio_free(VIPER_PSU_nCS_LD_GPIO);
 823 err_request_cs:
 824         gpio_free(VIPER_PSU_CLK_GPIO);
 825 err_request_clk:
 826         gpio_free(VIPER_PSU_DATA_GPIO);
 827 err_request_data:
 828         pr_err("viper: Failed to setup vcore control GPIOs\n");
 829 }
 830
 831 static void __init viper_init_serial_gpio(void)
 832 {
 833         if (gpio_request(VIPER_UART_SHDN_GPIO, "UARTs shutdown"))
 834                 goto err_request;
 835
 836         if (gpio_direction_output(VIPER_UART_SHDN_GPIO, 0))
 837                 goto err_dir;
 838
 839         return;
 840
 841 err_dir:
 842         gpio_free(VIPER_UART_SHDN_GPIO);
 843 err_request:
 844         pr_err("viper: Failed to setup UART shutdown GPIO\n");
 845 }
 846
 847 #ifdef CONFIG_CPU_FREQ
 848 static int viper_cpufreq_notifier(struct notifier_block *nb,
 849                                   unsigned long val, void *data)
 850 {
 851         struct cpufreq_freqs *freq = data;
 852
 853         /* TODO: Adjust timings??? */
 854
 855         switch (val) {
 856         case CPUFREQ_PRECHANGE:
 857                 if (freq->old < freq->new) {
 858                         /* we are getting faster so raise the voltage
 859                          * before we change freq */
 860                         viper_set_core_cpu_voltage(freq->new, 0);
 861                 }
 862                 break;
 863         case CPUFREQ_POSTCHANGE:
 864                 if (freq->old > freq->new) {
 865                         /* we are slowing down so drop the power
 866                          * after we change freq */
 867                         viper_set_core_cpu_voltage(freq->new, 0);
 868                 }
 869                 break;
 870         case CPUFREQ_RESUMECHANGE:
 871                 viper_set_core_cpu_voltage(freq->new, 0);
 872                 break;
 873         default:
 874                 /* ignore */
 875                 break;
 876         }
 877
 878         return 0;
 879 }
 880
 881 static struct notifier_block viper_cpufreq_notifier_block = {
 882         .notifier_call  = viper_cpufreq_notifier
 883 };
 884
 885 static void __init viper_init_cpufreq(void)
 886 {
 887         if (cpufreq_register_notifier(&viper_cpufreq_notifier_block,
 888                                       CPUFREQ_TRANSITION_NOTIFIER))
 889                 pr_err("viper: Failed to setup cpufreq notifier\n");
 890 }
 891 #else
 892 static inline void viper_init_cpufreq(void) {}
 893 #endif
 894
 895 static void viper_power_off(void)
 896 {
 897         pr_notice("Shutting off UPS\n");
 898         gpio_set_value(VIPER_UPS_GPIO, 1);
 899         /* Spin to death... */
 900         while (1);
 901 }
 902
 903 static void __init viper_init(void)
 904 {
 905         u8 version;
 906
 907         pm_power_off = viper_power_off;
 908
 909         pxa2xx_mfp_config(ARRAY_AND_SIZE(viper_pin_config));
 910
 911         /* Wake-up serial console */
 912         viper_init_serial_gpio();
 913
 914         set_pxa_fb_info(&fb_info);
 915
 916         /* v1 hardware cannot use the datacs line */
 917         version = viper_hw_version();
 918         if (version == 0)
 919                 smc91x_device.num_resources--;
 920
 921         pxa_set_i2c_info(NULL);
 922         platform_add_devices(viper_devs, ARRAY_SIZE(viper_devs));
 923
 924         viper_init_vcore_gpios();
 925         viper_init_cpufreq();
 926
 927         sysdev_driver_register(&cpu_sysdev_class, &viper_cpu_sysdev_driver);
 928
 929         if (version) {
 930                 pr_info("viper: hardware v%di%d detected. "
 931                         "CPLD revision %d.\n",
 932                         VIPER_BOARD_VERSION(version),
 933                         VIPER_BOARD_ISSUE(version),
 934                         VIPER_CPLD_REVISION(version));
 935                 system_rev = (VIPER_BOARD_VERSION(version) << 8) |
 936                              (VIPER_BOARD_ISSUE(version) << 4) |
 937                              VIPER_CPLD_REVISION(version);
 938         } else {
 939                 pr_info("viper: No version register.\n");
 940         }
 941
 942         i2c_register_board_info(1, ARRAY_AND_SIZE(viper_i2c_devices));
 943
 944         viper_tpm_init();
 945         pxa_set_ac97_info(NULL);
 946 }
 947
 948 static struct map_desc viper_io_desc[] __initdata = {
 949         {
 950                 .virtual = VIPER_CPLD_BASE,
 951                 .pfn     = __phys_to_pfn(VIPER_CPLD_PHYS),
 952                 .length  = 0x00300000,
 953                 .type    = MT_DEVICE,
 954         },
 955         {
 956                 .virtual = VIPER_PC104IO_BASE,
 957                 .pfn     = __phys_to_pfn(0x30000000),
 958                 .length  = 0x00800000,
 959                 .type    = MT_DEVICE,
 960         },
 961 };
 962
 963 static void __init viper_map_io(void)
 964 {
 965         pxa_map_io();
 966
 967         iotable_init(viper_io_desc, ARRAY_SIZE(viper_io_desc));
 968
 969         PCFR |= PCFR_OPDE;
 970 }
 971
 972 MACHINE_START(VIPER, "Arcom/Eurotech VIPER SBC")
 973         /* Maintainer: Marc Zyngier <maz@misterjones.org> */
 974         .phys_io        = 0x40000000,
 975         .io_pg_offst    = (io_p2v(0x40000000) >> 18) & 0xfffc,
 976         .boot_params    = 0xa0000100,
 977         .map_io         = viper_map_io,
 978         .init_irq       = viper_init_irq,
 979         .timer          = &pxa_timer,
 980         .init_machine   = viper_init,
 981 MACHINE_END