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