linux/arch/arm/mach-pxa/viper.c
<<
>>
Prefs
   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/slab.h>
  31#include <linux/interrupt.h>
  32#include <linux/major.h>
  33#include <linux/module.h>
  34#include <linux/pm.h>
  35#include <linux/sched.h>
  36#include <linux/gpio.h>
  37#include <linux/jiffies.h>
  38#include <linux/i2c-gpio.h>
  39#include <linux/i2c/pxa-i2c.h>
  40#include <linux/serial_8250.h>
  41#include <linux/smc91x.h>
  42#include <linux/pwm_backlight.h>
  43#include <linux/usb/isp116x.h>
  44#include <linux/mtd/mtd.h>
  45#include <linux/mtd/partitions.h>
  46#include <linux/mtd/physmap.h>
  47#include <linux/syscore_ops.h>
  48
  49#include <mach/pxa25x.h>
  50#include <mach/audio.h>
  51#include <linux/platform_data/video-pxafb.h>
  52#include <mach/regs-uart.h>
  53#include <linux/platform_data/pcmcia-pxa2xx_viper.h>
  54#include <mach/viper.h>
  55
  56#include <asm/setup.h>
  57#include <asm/mach-types.h>
  58#include <asm/irq.h>
  59#include <asm/sizes.h>
  60#include <asm/system_info.h>
  61
  62#include <asm/mach/arch.h>
  63#include <asm/mach/map.h>
  64#include <asm/mach/irq.h>
  65
  66#include "generic.h"
  67#include "devices.h"
  68
  69static unsigned int icr;
  70
  71static void viper_icr_set_bit(unsigned int bit)
  72{
  73        icr |= bit;
  74        VIPER_ICR = icr;
  75}
  76
  77static void viper_icr_clear_bit(unsigned int bit)
  78{
  79        icr &= ~bit;
  80        VIPER_ICR = icr;
  81}
  82
  83/* This function is used from the pcmcia module to reset the CF */
  84static void viper_cf_reset(int state)
  85{
  86        if (state)
  87                viper_icr_set_bit(VIPER_ICR_CF_RST);
  88        else
  89                viper_icr_clear_bit(VIPER_ICR_CF_RST);
  90}
  91
  92static struct arcom_pcmcia_pdata viper_pcmcia_info = {
  93        .cd_gpio        = VIPER_CF_CD_GPIO,
  94        .rdy_gpio       = VIPER_CF_RDY_GPIO,
  95        .pwr_gpio       = VIPER_CF_POWER_GPIO,
  96        .reset          = viper_cf_reset,
  97};
  98
  99static struct platform_device viper_pcmcia_device = {
 100        .name           = "viper-pcmcia",
 101        .id             = -1,
 102        .dev            = {
 103                .platform_data  = &viper_pcmcia_info,
 104        },
 105};
 106
 107/*
 108 * The CPLD version register was not present on VIPER boards prior to
 109 * v2i1. On v1 boards where the version register is not present we
 110 * will just read back the previous value from the databus.
 111 *
 112 * Therefore we do two reads. The first time we write 0 to the
 113 * (read-only) register before reading and the second time we write
 114 * 0xff first. If the two reads do not match or they read back as 0xff
 115 * or 0x00 then we have version 1 hardware.
 116 */
 117static u8 viper_hw_version(void)
 118{
 119        u8 v1, v2;
 120        unsigned long flags;
 121
 122        local_irq_save(flags);
 123
 124        VIPER_VERSION = 0;
 125        v1 = VIPER_VERSION;
 126        VIPER_VERSION = 0xff;
 127        v2 = VIPER_VERSION;
 128
 129        v1 = (v1 != v2 || v1 == 0xff) ? 0 : v1;
 130
 131        local_irq_restore(flags);
 132        return v1;
 133}
 134
 135/* CPU system core operations. */
 136static int viper_cpu_suspend(void)
 137{
 138        viper_icr_set_bit(VIPER_ICR_R_DIS);
 139        return 0;
 140}
 141
 142static void viper_cpu_resume(void)
 143{
 144        viper_icr_clear_bit(VIPER_ICR_R_DIS);
 145}
 146
 147static struct syscore_ops viper_cpu_syscore_ops = {
 148        .suspend        = viper_cpu_suspend,
 149        .resume         = viper_cpu_resume,
 150};
 151
 152static unsigned int current_voltage_divisor;
 153
 154/*
 155 * If force is not true then step from existing to new divisor. If
 156 * force is true then jump straight to the new divisor. Stepping is
 157 * used because if the jump in voltage is too large, the VCC can dip
 158 * too low and the regulator cuts out.
 159 *
 160 * force can be used to initialize the divisor to a know state by
 161 * setting the value for the current clock speed, since we are already
 162 * running at that speed we know the voltage should be pretty close so
 163 * the jump won't be too large
 164 */
 165static void viper_set_core_cpu_voltage(unsigned long khz, int force)
 166{
 167        int i = 0;
 168        unsigned int divisor = 0;
 169        const char *v;
 170
 171        if (khz < 200000) {
 172                v = "1.0"; divisor = 0xfff;
 173        } else if (khz < 300000) {
 174                v = "1.1"; divisor = 0xde5;
 175        } else {
 176                v = "1.3"; divisor = 0x325;
 177        }
 178
 179        pr_debug("viper: setting CPU core voltage to %sV at %d.%03dMHz\n",
 180                 v, (int)khz / 1000, (int)khz % 1000);
 181
 182#define STEP 0x100
 183        do {
 184                int step;
 185
 186                if (force)
 187                        step = divisor;
 188                else if (current_voltage_divisor < divisor - STEP)
 189                        step = current_voltage_divisor + STEP;
 190                else if (current_voltage_divisor > divisor + STEP)
 191                        step = current_voltage_divisor - STEP;
 192                else
 193                        step = divisor;
 194                force = 0;
 195
 196                gpio_set_value(VIPER_PSU_CLK_GPIO, 0);
 197                gpio_set_value(VIPER_PSU_nCS_LD_GPIO, 0);
 198
 199                for (i = 1 << 11 ; i > 0 ; i >>= 1) {
 200                        udelay(1);
 201
 202                        gpio_set_value(VIPER_PSU_DATA_GPIO, step & i);
 203                        udelay(1);
 204
 205                        gpio_set_value(VIPER_PSU_CLK_GPIO, 1);
 206                        udelay(1);
 207
 208                        gpio_set_value(VIPER_PSU_CLK_GPIO, 0);
 209                }
 210                udelay(1);
 211
 212                gpio_set_value(VIPER_PSU_nCS_LD_GPIO, 1);
 213                udelay(1);
 214
 215                gpio_set_value(VIPER_PSU_nCS_LD_GPIO, 0);
 216
 217                current_voltage_divisor = step;
 218        } while (current_voltage_divisor != divisor);
 219}
 220
 221/* Interrupt handling */
 222static unsigned long viper_irq_enabled_mask;
 223static const int viper_isa_irqs[] = { 3, 4, 5, 6, 7, 10, 11, 12, 9, 14, 15 };
 224static const int viper_isa_irq_map[] = {
 225        0,              /* ISA irq #0, invalid */
 226        0,              /* ISA irq #1, invalid */
 227        0,              /* ISA irq #2, invalid */
 228        1 << 0,         /* ISA irq #3 */
 229        1 << 1,         /* ISA irq #4 */
 230        1 << 2,         /* ISA irq #5 */
 231        1 << 3,         /* ISA irq #6 */
 232        1 << 4,         /* ISA irq #7 */
 233        0,              /* ISA irq #8, invalid */
 234        1 << 8,         /* ISA irq #9 */
 235        1 << 5,         /* ISA irq #10 */
 236        1 << 6,         /* ISA irq #11 */
 237        1 << 7,         /* ISA irq #12 */
 238        0,              /* ISA irq #13, invalid */
 239        1 << 9,         /* ISA irq #14 */
 240        1 << 10,        /* ISA irq #15 */
 241};
 242
 243static inline int viper_irq_to_bitmask(unsigned int irq)
 244{
 245        return viper_isa_irq_map[irq - PXA_ISA_IRQ(0)];
 246}
 247
 248static inline int viper_bit_to_irq(int bit)
 249{
 250        return viper_isa_irqs[bit] + PXA_ISA_IRQ(0);
 251}
 252
 253static void viper_ack_irq(struct irq_data *d)
 254{
 255        int viper_irq = viper_irq_to_bitmask(d->irq);
 256
 257        if (viper_irq & 0xff)
 258                VIPER_LO_IRQ_STATUS = viper_irq;
 259        else
 260                VIPER_HI_IRQ_STATUS = (viper_irq >> 8);
 261}
 262
 263static void viper_mask_irq(struct irq_data *d)
 264{
 265        viper_irq_enabled_mask &= ~(viper_irq_to_bitmask(d->irq));
 266}
 267
 268static void viper_unmask_irq(struct irq_data *d)
 269{
 270        viper_irq_enabled_mask |= viper_irq_to_bitmask(d->irq);
 271}
 272
 273static inline unsigned long viper_irq_pending(void)
 274{
 275        return (VIPER_HI_IRQ_STATUS << 8 | VIPER_LO_IRQ_STATUS) &
 276                        viper_irq_enabled_mask;
 277}
 278
 279static void viper_irq_handler(struct irq_desc *desc)
 280{
 281        unsigned int irq;
 282        unsigned long pending;
 283
 284        pending = viper_irq_pending();
 285        do {
 286                /* we're in a chained irq handler,
 287                 * so ack the interrupt by hand */
 288                desc->irq_data.chip->irq_ack(&desc->irq_data);
 289
 290                if (likely(pending)) {
 291                        irq = viper_bit_to_irq(__ffs(pending));
 292                        generic_handle_irq(irq);
 293                }
 294                pending = viper_irq_pending();
 295        } while (pending);
 296}
 297
 298static struct irq_chip viper_irq_chip = {
 299        .name           = "ISA",
 300        .irq_ack        = viper_ack_irq,
 301        .irq_mask       = viper_mask_irq,
 302        .irq_unmask     = viper_unmask_irq
 303};
 304
 305static void __init viper_init_irq(void)
 306{
 307        int level;
 308        int isa_irq;
 309
 310        pxa25x_init_irq();
 311
 312        /* setup ISA IRQs */
 313        for (level = 0; level < ARRAY_SIZE(viper_isa_irqs); level++) {
 314                isa_irq = viper_bit_to_irq(level);
 315                irq_set_chip_and_handler(isa_irq, &viper_irq_chip,
 316                                         handle_edge_irq);
 317                irq_clear_status_flags(isa_irq, IRQ_NOREQUEST | IRQ_NOPROBE);
 318        }
 319
 320        irq_set_chained_handler(gpio_to_irq(VIPER_CPLD_GPIO),
 321                                viper_irq_handler);
 322        irq_set_irq_type(gpio_to_irq(VIPER_CPLD_GPIO), IRQ_TYPE_EDGE_BOTH);
 323}
 324
 325/* Flat Panel */
 326static struct pxafb_mode_info fb_mode_info[] = {
 327        {
 328                .pixclock       = 157500,
 329
 330                .xres           = 320,
 331                .yres           = 240,
 332
 333                .bpp            = 16,
 334
 335                .hsync_len      = 63,
 336                .left_margin    = 7,
 337                .right_margin   = 13,
 338
 339                .vsync_len      = 20,
 340                .upper_margin   = 0,
 341                .lower_margin   = 0,
 342
 343                .sync           = 0,
 344        },
 345};
 346
 347static struct pxafb_mach_info fb_info = {
 348        .modes                  = fb_mode_info,
 349        .num_modes              = 1,
 350        .lcd_conn               = LCD_COLOR_TFT_16BPP | LCD_PCLK_EDGE_FALL,
 351};
 352
 353static int viper_backlight_init(struct device *dev)
 354{
 355        int ret;
 356
 357        /* GPIO9 and 10 control FB backlight. Initialise to off */
 358        ret = gpio_request(VIPER_BCKLIGHT_EN_GPIO, "Backlight");
 359        if (ret)
 360                goto err_request_bckl;
 361
 362        ret = gpio_request(VIPER_LCD_EN_GPIO, "LCD");
 363        if (ret)
 364                goto err_request_lcd;
 365
 366        ret = gpio_direction_output(VIPER_BCKLIGHT_EN_GPIO, 0);
 367        if (ret)
 368                goto err_dir;
 369
 370        ret = gpio_direction_output(VIPER_LCD_EN_GPIO, 0);
 371        if (ret)
 372                goto err_dir;
 373
 374        return 0;
 375
 376err_dir:
 377        gpio_free(VIPER_LCD_EN_GPIO);
 378err_request_lcd:
 379        gpio_free(VIPER_BCKLIGHT_EN_GPIO);
 380err_request_bckl:
 381        dev_err(dev, "Failed to setup LCD GPIOs\n");
 382
 383        return ret;
 384}
 385
 386static int viper_backlight_notify(struct device *dev, int brightness)
 387{
 388        gpio_set_value(VIPER_LCD_EN_GPIO, !!brightness);
 389        gpio_set_value(VIPER_BCKLIGHT_EN_GPIO, !!brightness);
 390
 391        return brightness;
 392}
 393
 394static void viper_backlight_exit(struct device *dev)
 395{
 396        gpio_free(VIPER_LCD_EN_GPIO);
 397        gpio_free(VIPER_BCKLIGHT_EN_GPIO);
 398}
 399
 400static struct platform_pwm_backlight_data viper_backlight_data = {
 401        .pwm_id         = 0,
 402        .max_brightness = 100,
 403        .dft_brightness = 100,
 404        .pwm_period_ns  = 1000000,
 405        .enable_gpio    = -1,
 406        .init           = viper_backlight_init,
 407        .notify         = viper_backlight_notify,
 408        .exit           = viper_backlight_exit,
 409};
 410
 411static struct platform_device viper_backlight_device = {
 412        .name           = "pwm-backlight",
 413        .dev            = {
 414                .parent         = &pxa25x_device_pwm0.dev,
 415                .platform_data  = &viper_backlight_data,
 416        },
 417};
 418
 419/* Ethernet */
 420static struct resource smc91x_resources[] = {
 421        [0] = {
 422                .name   = "smc91x-regs",
 423                .start  = VIPER_ETH_PHYS + 0x300,
 424                .end    = VIPER_ETH_PHYS + 0x30f,
 425                .flags  = IORESOURCE_MEM,
 426        },
 427        [1] = {
 428                .start  = PXA_GPIO_TO_IRQ(VIPER_ETH_GPIO),
 429                .end    = PXA_GPIO_TO_IRQ(VIPER_ETH_GPIO),
 430                .flags  = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
 431        },
 432        [2] = {
 433                .name   = "smc91x-data32",
 434                .start  = VIPER_ETH_DATA_PHYS,
 435                .end    = VIPER_ETH_DATA_PHYS + 3,
 436                .flags  = IORESOURCE_MEM,
 437        },
 438};
 439
 440static struct smc91x_platdata viper_smc91x_info = {
 441        .flags  = SMC91X_USE_16BIT | SMC91X_NOWAIT,
 442        .leda   = RPC_LED_100_10,
 443        .ledb   = RPC_LED_TX_RX,
 444};
 445
 446static struct platform_device smc91x_device = {
 447        .name           = "smc91x",
 448        .id             = -1,
 449        .num_resources  = ARRAY_SIZE(smc91x_resources),
 450        .resource       = smc91x_resources,
 451        .dev            = {
 452                .platform_data  = &viper_smc91x_info,
 453        },
 454};
 455
 456/* i2c */
 457static struct i2c_gpio_platform_data i2c_bus_data = {
 458        .sda_pin = VIPER_RTC_I2C_SDA_GPIO,
 459        .scl_pin = VIPER_RTC_I2C_SCL_GPIO,
 460        .udelay  = 10,
 461        .timeout = HZ,
 462};
 463
 464static struct platform_device i2c_bus_device = {
 465        .name           = "i2c-gpio",
 466        .id             = 1, /* pxa2xx-i2c is bus 0, so start at 1 */
 467        .dev = {
 468                .platform_data = &i2c_bus_data,
 469        }
 470};
 471
 472static struct i2c_board_info __initdata viper_i2c_devices[] = {
 473        {
 474                I2C_BOARD_INFO("ds1338", 0x68),
 475        },
 476};
 477
 478/*
 479 * Serial configuration:
 480 * You can either have the standard PXA ports driven by the PXA driver,
 481 * or all the ports (PXA + 16850) driven by the 8250 driver.
 482 * Choose your poison.
 483 */
 484
 485static struct resource viper_serial_resources[] = {
 486#ifndef CONFIG_SERIAL_PXA
 487        {
 488                .start  = 0x40100000,
 489                .end    = 0x4010001f,
 490                .flags  = IORESOURCE_MEM,
 491        },
 492        {
 493                .start  = 0x40200000,
 494                .end    = 0x4020001f,
 495                .flags  = IORESOURCE_MEM,
 496        },
 497        {
 498                .start  = 0x40700000,
 499                .end    = 0x4070001f,
 500                .flags  = IORESOURCE_MEM,
 501        },
 502        {
 503                .start  = VIPER_UARTA_PHYS,
 504                .end    = VIPER_UARTA_PHYS + 0xf,
 505                .flags  = IORESOURCE_MEM,
 506        },
 507        {
 508                .start  = VIPER_UARTB_PHYS,
 509                .end    = VIPER_UARTB_PHYS + 0xf,
 510                .flags  = IORESOURCE_MEM,
 511        },
 512#else
 513        {
 514                0,
 515        },
 516#endif
 517};
 518
 519static struct plat_serial8250_port serial_platform_data[] = {
 520#ifndef CONFIG_SERIAL_PXA
 521        /* Internal UARTs */
 522        {
 523                .membase        = (void *)&FFUART,
 524                .mapbase        = __PREG(FFUART),
 525                .irq            = IRQ_FFUART,
 526                .uartclk        = 921600 * 16,
 527                .regshift       = 2,
 528                .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
 529                .iotype         = UPIO_MEM,
 530        },
 531        {
 532                .membase        = (void *)&BTUART,
 533                .mapbase        = __PREG(BTUART),
 534                .irq            = IRQ_BTUART,
 535                .uartclk        = 921600 * 16,
 536                .regshift       = 2,
 537                .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
 538                .iotype         = UPIO_MEM,
 539        },
 540        {
 541                .membase        = (void *)&STUART,
 542                .mapbase        = __PREG(STUART),
 543                .irq            = IRQ_STUART,
 544                .uartclk        = 921600 * 16,
 545                .regshift       = 2,
 546                .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
 547                .iotype         = UPIO_MEM,
 548        },
 549        /* External UARTs */
 550        {
 551                .mapbase        = VIPER_UARTA_PHYS,
 552                .irq            = PXA_GPIO_TO_IRQ(VIPER_UARTA_GPIO),
 553                .irqflags       = IRQF_TRIGGER_RISING,
 554                .uartclk        = 1843200,
 555                .regshift       = 1,
 556                .iotype         = UPIO_MEM,
 557                .flags          = UPF_BOOT_AUTOCONF | UPF_IOREMAP |
 558                                  UPF_SKIP_TEST,
 559        },
 560        {
 561                .mapbase        = VIPER_UARTB_PHYS,
 562                .irq            = PXA_GPIO_TO_IRQ(VIPER_UARTB_GPIO),
 563                .irqflags       = IRQF_TRIGGER_RISING,
 564                .uartclk        = 1843200,
 565                .regshift       = 1,
 566                .iotype         = UPIO_MEM,
 567                .flags          = UPF_BOOT_AUTOCONF | UPF_IOREMAP |
 568                                  UPF_SKIP_TEST,
 569        },
 570#endif
 571        { },
 572};
 573
 574static struct platform_device serial_device = {
 575        .name                   = "serial8250",
 576        .id                     = 0,
 577        .dev                    = {
 578                .platform_data  = serial_platform_data,
 579        },
 580        .num_resources          = ARRAY_SIZE(viper_serial_resources),
 581        .resource               = viper_serial_resources,
 582};
 583
 584/* USB */
 585static void isp116x_delay(struct device *dev, int delay)
 586{
 587        ndelay(delay);
 588}
 589
 590static struct resource isp116x_resources[] = {
 591        [0] = { /* DATA */
 592                .start  = VIPER_USB_PHYS + 0,
 593                .end    = VIPER_USB_PHYS + 1,
 594                .flags  = IORESOURCE_MEM,
 595        },
 596        [1] = { /* ADDR */
 597                .start  = VIPER_USB_PHYS + 2,
 598                .end    = VIPER_USB_PHYS + 3,
 599                .flags  = IORESOURCE_MEM,
 600        },
 601        [2] = {
 602                .start  = PXA_GPIO_TO_IRQ(VIPER_USB_GPIO),
 603                .end    = PXA_GPIO_TO_IRQ(VIPER_USB_GPIO),
 604                .flags  = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
 605        },
 606};
 607
 608/* (DataBusWidth16|AnalogOCEnable|DREQOutputPolarity|DownstreamPort15KRSel ) */
 609static struct isp116x_platform_data isp116x_platform_data = {
 610        /* Enable internal resistors on downstream ports */
 611        .sel15Kres              = 1,
 612        /* On-chip overcurrent protection */
 613        .oc_enable              = 1,
 614        /* INT output polarity */
 615        .int_act_high           = 1,
 616        /* INT edge or level triggered */
 617        .int_edge_triggered     = 0,
 618
 619        /* WAKEUP pin connected - NOT SUPPORTED  */
 620        /* .remote_wakeup_connected = 0, */
 621        /* Wakeup by devices on usb bus enabled */
 622        .remote_wakeup_enable   = 0,
 623        .delay                  = isp116x_delay,
 624};
 625
 626static struct platform_device isp116x_device = {
 627        .name                   = "isp116x-hcd",
 628        .id                     = -1,
 629        .num_resources          = ARRAY_SIZE(isp116x_resources),
 630        .resource               = isp116x_resources,
 631        .dev                    = {
 632                .platform_data  = &isp116x_platform_data,
 633        },
 634
 635};
 636
 637/* MTD */
 638static struct resource mtd_resources[] = {
 639        [0] = { /* RedBoot config + filesystem flash */
 640                .start  = VIPER_FLASH_PHYS,
 641                .end    = VIPER_FLASH_PHYS + SZ_32M - 1,
 642                .flags  = IORESOURCE_MEM,
 643        },
 644        [1] = { /* Boot flash */
 645                .start  = VIPER_BOOT_PHYS,
 646                .end    = VIPER_BOOT_PHYS + SZ_1M - 1,
 647                .flags  = IORESOURCE_MEM,
 648        },
 649        [2] = { /*
 650                 * SRAM size is actually 256KB, 8bits, with a sparse mapping
 651                 * (each byte is on a 16bit boundary).
 652                 */
 653                .start  = _VIPER_SRAM_BASE,
 654                .end    = _VIPER_SRAM_BASE + SZ_512K - 1,
 655                .flags  = IORESOURCE_MEM,
 656        },
 657};
 658
 659static struct mtd_partition viper_boot_flash_partition = {
 660        .name           = "RedBoot",
 661        .size           = SZ_1M,
 662        .offset         = 0,
 663        .mask_flags     = MTD_WRITEABLE,        /* force R/O */
 664};
 665
 666static struct physmap_flash_data viper_flash_data[] = {
 667        [0] = {
 668                .width          = 2,
 669                .parts          = NULL,
 670                .nr_parts       = 0,
 671        },
 672        [1] = {
 673                .width          = 2,
 674                .parts          = &viper_boot_flash_partition,
 675                .nr_parts       = 1,
 676        },
 677};
 678
 679static struct platform_device viper_mtd_devices[] = {
 680        [0] = {
 681                .name           = "physmap-flash",
 682                .id             = 0,
 683                .dev            = {
 684                        .platform_data  = &viper_flash_data[0],
 685                },
 686                .resource       = &mtd_resources[0],
 687                .num_resources  = 1,
 688        },
 689        [1] = {
 690                .name           = "physmap-flash",
 691                .id             = 1,
 692                .dev            = {
 693                        .platform_data  = &viper_flash_data[1],
 694                },
 695                .resource       = &mtd_resources[1],
 696                .num_resources  = 1,
 697        },
 698};
 699
 700static struct platform_device *viper_devs[] __initdata = {
 701        &smc91x_device,
 702        &i2c_bus_device,
 703        &serial_device,
 704        &isp116x_device,
 705        &viper_mtd_devices[0],
 706        &viper_mtd_devices[1],
 707        &viper_backlight_device,
 708        &viper_pcmcia_device,
 709};
 710
 711static mfp_cfg_t viper_pin_config[] __initdata = {
 712        /* Chip selects */
 713        GPIO15_nCS_1,
 714        GPIO78_nCS_2,
 715        GPIO79_nCS_3,
 716        GPIO80_nCS_4,
 717        GPIO33_nCS_5,
 718
 719        /* AC97 */
 720        GPIO28_AC97_BITCLK,
 721        GPIO29_AC97_SDATA_IN_0,
 722        GPIO30_AC97_SDATA_OUT,
 723        GPIO31_AC97_SYNC,
 724
 725        /* FP Backlight */
 726        GPIO9_GPIO,                             /* VIPER_BCKLIGHT_EN_GPIO */
 727        GPIO10_GPIO,                            /* VIPER_LCD_EN_GPIO */
 728        GPIO16_PWM0_OUT,
 729
 730        /* Ethernet PHY Ready */
 731        GPIO18_RDY,
 732
 733        /* Serial shutdown */
 734        GPIO12_GPIO | MFP_LPM_DRIVE_HIGH,       /* VIPER_UART_SHDN_GPIO */
 735
 736        /* Compact-Flash / PC104 */
 737        GPIO48_nPOE,
 738        GPIO49_nPWE,
 739        GPIO50_nPIOR,
 740        GPIO51_nPIOW,
 741        GPIO52_nPCE_1,
 742        GPIO53_nPCE_2,
 743        GPIO54_nPSKTSEL,
 744        GPIO55_nPREG,
 745        GPIO56_nPWAIT,
 746        GPIO57_nIOIS16,
 747        GPIO8_GPIO,                             /* VIPER_CF_RDY_GPIO */
 748        GPIO32_GPIO,                            /* VIPER_CF_CD_GPIO */
 749        GPIO82_GPIO,                            /* VIPER_CF_POWER_GPIO */
 750
 751        /* Integrated UPS control */
 752        GPIO20_GPIO,                            /* VIPER_UPS_GPIO */
 753
 754        /* Vcc regulator control */
 755        GPIO6_GPIO,                             /* VIPER_PSU_DATA_GPIO */
 756        GPIO11_GPIO,                            /* VIPER_PSU_CLK_GPIO */
 757        GPIO19_GPIO,                            /* VIPER_PSU_nCS_LD_GPIO */
 758
 759        /* i2c busses */
 760        GPIO26_GPIO,                            /* VIPER_TPM_I2C_SDA_GPIO */
 761        GPIO27_GPIO,                            /* VIPER_TPM_I2C_SCL_GPIO */
 762        GPIO83_GPIO,                            /* VIPER_RTC_I2C_SDA_GPIO */
 763        GPIO84_GPIO,                            /* VIPER_RTC_I2C_SCL_GPIO */
 764
 765        /* PC/104 Interrupt */
 766        GPIO1_GPIO | WAKEUP_ON_EDGE_RISE,       /* VIPER_CPLD_GPIO */
 767};
 768
 769static unsigned long viper_tpm;
 770
 771static int __init viper_tpm_setup(char *str)
 772{
 773        return kstrtoul(str, 10, &viper_tpm) >= 0;
 774}
 775
 776__setup("tpm=", viper_tpm_setup);
 777
 778static void __init viper_tpm_init(void)
 779{
 780        struct platform_device *tpm_device;
 781        struct i2c_gpio_platform_data i2c_tpm_data = {
 782                .sda_pin = VIPER_TPM_I2C_SDA_GPIO,
 783                .scl_pin = VIPER_TPM_I2C_SCL_GPIO,
 784                .udelay  = 10,
 785                .timeout = HZ,
 786        };
 787        char *errstr;
 788
 789        /* Allocate TPM i2c bus if requested */
 790        if (!viper_tpm)
 791                return;
 792
 793        tpm_device = platform_device_alloc("i2c-gpio", 2);
 794        if (tpm_device) {
 795                if (!platform_device_add_data(tpm_device,
 796                                              &i2c_tpm_data,
 797                                              sizeof(i2c_tpm_data))) {
 798                        if (platform_device_add(tpm_device)) {
 799                                errstr = "register TPM i2c bus";
 800                                goto error_free_tpm;
 801                        }
 802                } else {
 803                        errstr = "allocate TPM i2c bus data";
 804                        goto error_free_tpm;
 805                }
 806        } else {
 807                errstr = "allocate TPM i2c device";
 808                goto error_tpm;
 809        }
 810
 811        return;
 812
 813error_free_tpm:
 814        kfree(tpm_device);
 815error_tpm:
 816        pr_err("viper: Couldn't %s, giving up\n", errstr);
 817}
 818
 819static void __init viper_init_vcore_gpios(void)
 820{
 821        if (gpio_request(VIPER_PSU_DATA_GPIO, "PSU data"))
 822                goto err_request_data;
 823
 824        if (gpio_request(VIPER_PSU_CLK_GPIO, "PSU clock"))
 825                goto err_request_clk;
 826
 827        if (gpio_request(VIPER_PSU_nCS_LD_GPIO, "PSU cs"))
 828                goto err_request_cs;
 829
 830        if (gpio_direction_output(VIPER_PSU_DATA_GPIO, 0) ||
 831            gpio_direction_output(VIPER_PSU_CLK_GPIO, 0) ||
 832            gpio_direction_output(VIPER_PSU_nCS_LD_GPIO, 0))
 833                goto err_dir;
 834
 835        /* c/should assume redboot set the correct level ??? */
 836        viper_set_core_cpu_voltage(get_clk_frequency_khz(0), 1);
 837
 838        return;
 839
 840err_dir:
 841        gpio_free(VIPER_PSU_nCS_LD_GPIO);
 842err_request_cs:
 843        gpio_free(VIPER_PSU_CLK_GPIO);
 844err_request_clk:
 845        gpio_free(VIPER_PSU_DATA_GPIO);
 846err_request_data:
 847        pr_err("viper: Failed to setup vcore control GPIOs\n");
 848}
 849
 850static void __init viper_init_serial_gpio(void)
 851{
 852        if (gpio_request(VIPER_UART_SHDN_GPIO, "UARTs shutdown"))
 853                goto err_request;
 854
 855        if (gpio_direction_output(VIPER_UART_SHDN_GPIO, 0))
 856                goto err_dir;
 857
 858        return;
 859
 860err_dir:
 861        gpio_free(VIPER_UART_SHDN_GPIO);
 862err_request:
 863        pr_err("viper: Failed to setup UART shutdown GPIO\n");
 864}
 865
 866#ifdef CONFIG_CPU_FREQ
 867static int viper_cpufreq_notifier(struct notifier_block *nb,
 868                                  unsigned long val, void *data)
 869{
 870        struct cpufreq_freqs *freq = data;
 871
 872        /* TODO: Adjust timings??? */
 873
 874        switch (val) {
 875        case CPUFREQ_PRECHANGE:
 876                if (freq->old < freq->new) {
 877                        /* we are getting faster so raise the voltage
 878                         * before we change freq */
 879                        viper_set_core_cpu_voltage(freq->new, 0);
 880                }
 881                break;
 882        case CPUFREQ_POSTCHANGE:
 883                if (freq->old > freq->new) {
 884                        /* we are slowing down so drop the power
 885                         * after we change freq */
 886                        viper_set_core_cpu_voltage(freq->new, 0);
 887                }
 888                break;
 889        default:
 890                /* ignore */
 891                break;
 892        }
 893
 894        return 0;
 895}
 896
 897static struct notifier_block viper_cpufreq_notifier_block = {
 898        .notifier_call  = viper_cpufreq_notifier
 899};
 900
 901static void __init viper_init_cpufreq(void)
 902{
 903        if (cpufreq_register_notifier(&viper_cpufreq_notifier_block,
 904                                      CPUFREQ_TRANSITION_NOTIFIER))
 905                pr_err("viper: Failed to setup cpufreq notifier\n");
 906}
 907#else
 908static inline void viper_init_cpufreq(void) {}
 909#endif
 910
 911static void viper_power_off(void)
 912{
 913        pr_notice("Shutting off UPS\n");
 914        gpio_set_value(VIPER_UPS_GPIO, 1);
 915        /* Spin to death... */
 916        while (1);
 917}
 918
 919static void __init viper_init(void)
 920{
 921        u8 version;
 922
 923        pm_power_off = viper_power_off;
 924
 925        pxa2xx_mfp_config(ARRAY_AND_SIZE(viper_pin_config));
 926
 927        pxa_set_ffuart_info(NULL);
 928        pxa_set_btuart_info(NULL);
 929        pxa_set_stuart_info(NULL);
 930
 931        /* Wake-up serial console */
 932        viper_init_serial_gpio();
 933
 934        pxa_set_fb_info(NULL, &fb_info);
 935
 936        /* v1 hardware cannot use the datacs line */
 937        version = viper_hw_version();
 938        if (version == 0)
 939                smc91x_device.num_resources--;
 940
 941        pxa_set_i2c_info(NULL);
 942        platform_add_devices(viper_devs, ARRAY_SIZE(viper_devs));
 943
 944        viper_init_vcore_gpios();
 945        viper_init_cpufreq();
 946
 947        register_syscore_ops(&viper_cpu_syscore_ops);
 948
 949        if (version) {
 950                pr_info("viper: hardware v%di%d detected. "
 951                        "CPLD revision %d.\n",
 952                        VIPER_BOARD_VERSION(version),
 953                        VIPER_BOARD_ISSUE(version),
 954                        VIPER_CPLD_REVISION(version));
 955                system_rev = (VIPER_BOARD_VERSION(version) << 8) |
 956                             (VIPER_BOARD_ISSUE(version) << 4) |
 957                             VIPER_CPLD_REVISION(version);
 958        } else {
 959                pr_info("viper: No version register.\n");
 960        }
 961
 962        i2c_register_board_info(1, ARRAY_AND_SIZE(viper_i2c_devices));
 963
 964        viper_tpm_init();
 965        pxa_set_ac97_info(NULL);
 966}
 967
 968static struct map_desc viper_io_desc[] __initdata = {
 969        {
 970                .virtual = VIPER_CPLD_BASE,
 971                .pfn     = __phys_to_pfn(VIPER_CPLD_PHYS),
 972                .length  = 0x00300000,
 973                .type    = MT_DEVICE,
 974        },
 975        {
 976                .virtual = VIPER_PC104IO_BASE,
 977                .pfn     = __phys_to_pfn(0x30000000),
 978                .length  = 0x00800000,
 979                .type    = MT_DEVICE,
 980        },
 981};
 982
 983static void __init viper_map_io(void)
 984{
 985        pxa25x_map_io();
 986
 987        iotable_init(viper_io_desc, ARRAY_SIZE(viper_io_desc));
 988
 989        PCFR |= PCFR_OPDE;
 990}
 991
 992MACHINE_START(VIPER, "Arcom/Eurotech VIPER SBC")
 993        /* Maintainer: Marc Zyngier <maz@misterjones.org> */
 994        .atag_offset    = 0x100,
 995        .map_io         = viper_map_io,
 996        .nr_irqs        = PXA_NR_IRQS,
 997        .init_irq       = viper_init_irq,
 998        .handle_irq     = pxa25x_handle_irq,
 999        .init_time      = pxa_timer_init,
1000        .init_machine   = viper_init,
1001        .restart        = pxa_restart,
1002MACHINE_END
1003