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/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
  69 static unsigned int icr;
  70
  71 static void viper_icr_set_bit(unsigned int bit)
  72 {
  73         icr |= bit;
  74         VIPER_ICR = icr;
  75 }
  76
  77 static 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 */
  84 static 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
  92 static 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
  99 static 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  */
 117 static 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. */
 136 static int viper_cpu_suspend(void)
 137 {
 138         viper_icr_set_bit(VIPER_ICR_R_DIS);
 139         return 0;
 140 }
 141
 142 static void viper_cpu_resume(void)
 143 {
 144         viper_icr_clear_bit(VIPER_ICR_R_DIS);
 145 }
 146
 147 static struct syscore_ops viper_cpu_syscore_ops = {
 148         .suspend        = viper_cpu_suspend,
 149         .resume         = viper_cpu_resume,
 150 };
 151
 152 static 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  */
 165 static 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 */
 222 static unsigned long viper_irq_enabled_mask;
 223 static const int viper_isa_irqs[] = { 3, 4, 5, 6, 7, 10, 11, 12, 9, 14, 15 };
 224 static 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
 243 static inline int viper_irq_to_bitmask(unsigned int irq)
 244 {
 245         return viper_isa_irq_map[irq - PXA_ISA_IRQ(0)];
 246 }
 247
 248 static inline int viper_bit_to_irq(int bit)
 249 {
 250         return viper_isa_irqs[bit] + PXA_ISA_IRQ(0);
 251 }
 252
 253 static 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
 263 static void viper_mask_irq(struct irq_data *d)
 264 {
 265         viper_irq_enabled_mask &= ~(viper_irq_to_bitmask(d->irq));
 266 }
 267
 268 static void viper_unmask_irq(struct irq_data *d)
 269 {
 270         viper_irq_enabled_mask |= viper_irq_to_bitmask(d->irq);
 271 }
 272
 273 static 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
 279 static 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
 298 static 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
 305 static 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 */
 326 static 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
 347 static 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
 353 static 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
 376 err_dir:
 377         gpio_free(VIPER_LCD_EN_GPIO);
 378 err_request_lcd:
 379         gpio_free(VIPER_BCKLIGHT_EN_GPIO);
 380 err_request_bckl:
 381         dev_err(dev, "Failed to setup LCD GPIOs\n");
 382
 383         return ret;
 384 }
 385
 386 static 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
 394 static void viper_backlight_exit(struct device *dev)
 395 {
 396         gpio_free(VIPER_LCD_EN_GPIO);
 397         gpio_free(VIPER_BCKLIGHT_EN_GPIO);
 398 }
 399
 400 static 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
 411 static 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 */
 420 static 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
 440 static 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
 446 static 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 */
 457 static 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
 464 static 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
 472 static 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
 485 static 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
 519 static 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
 574 static 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 */
 585 static void isp116x_delay(struct device *dev, int delay)
 586 {
 587         ndelay(delay);
 588 }
 589
 590 static 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 ) */
 609 static 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
 626 static 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 */
 638 static 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
 659 static 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
 666 static 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
 679 static 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
 700 static 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
 711 static 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
 769 static unsigned long viper_tpm;
 770
 771 static 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
 778 static 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
 813 error_free_tpm:
 814         kfree(tpm_device);
 815 error_tpm:
 816         pr_err("viper: Couldn't %s, giving up\n", errstr);
 817 }
 818
 819 static 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
 840 err_dir:
 841         gpio_free(VIPER_PSU_nCS_LD_GPIO);
 842 err_request_cs:
 843         gpio_free(VIPER_PSU_CLK_GPIO);
 844 err_request_clk:
 845         gpio_free(VIPER_PSU_DATA_GPIO);
 846 err_request_data:
 847         pr_err("viper: Failed to setup vcore control GPIOs\n");
 848 }
 849
 850 static 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
 860 err_dir:
 861         gpio_free(VIPER_UART_SHDN_GPIO);
 862 err_request:
 863         pr_err("viper: Failed to setup UART shutdown GPIO\n");
 864 }
 865
 866 #ifdef CONFIG_CPU_FREQ
 867 static 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
 897 static struct notifier_block viper_cpufreq_notifier_block = {
 898         .notifier_call  = viper_cpufreq_notifier
 899 };
 900
 901 static 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
 908 static inline void viper_init_cpufreq(void) {}
 909 #endif
 910
 911 static 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
 919 static 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
 968 static 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
 983 static 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
 992 MACHINE_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,
1002 MACHINE_END