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(unsigned int irq, struct irq_desc *desc)
 280 {
 281         unsigned long pending;
 282
 283         pending = viper_irq_pending();
 284         do {
 285                 /* we're in a chained irq handler,
 286                  * so ack the interrupt by hand */
 287                 desc->irq_data.chip->irq_ack(&desc->irq_data);
 288
 289                 if (likely(pending)) {
 290                         irq = viper_bit_to_irq(__ffs(pending));
 291                         generic_handle_irq(irq);
 292                 }
 293                 pending = viper_irq_pending();
 294         } while (pending);
 295 }
 296
 297 static struct irq_chip viper_irq_chip = {
 298         .name           = "ISA",
 299         .irq_ack        = viper_ack_irq,
 300         .irq_mask       = viper_mask_irq,
 301         .irq_unmask     = viper_unmask_irq
 302 };
 303
 304 static void __init viper_init_irq(void)
 305 {
 306         int level;
 307         int isa_irq;
 308
 309         pxa25x_init_irq();
 310
 311         /* setup ISA IRQs */
 312         for (level = 0; level < ARRAY_SIZE(viper_isa_irqs); level++) {
 313                 isa_irq = viper_bit_to_irq(level);
 314                 irq_set_chip_and_handler(isa_irq, &viper_irq_chip,
 315                                          handle_edge_irq);
 316                 set_irq_flags(isa_irq, IRQF_VALID | IRQF_PROBE);
 317         }
 318
 319         irq_set_chained_handler(gpio_to_irq(VIPER_CPLD_GPIO),
 320                                 viper_irq_handler);
 321         irq_set_irq_type(gpio_to_irq(VIPER_CPLD_GPIO), IRQ_TYPE_EDGE_BOTH);
 322 }
 323
 324 /* Flat Panel */
 325 static struct pxafb_mode_info fb_mode_info[] = {
 326         {
 327                 .pixclock       = 157500,
 328
 329                 .xres           = 320,
 330                 .yres           = 240,
 331
 332                 .bpp            = 16,
 333
 334                 .hsync_len      = 63,
 335                 .left_margin    = 7,
 336                 .right_margin   = 13,
 337
 338                 .vsync_len      = 20,
 339                 .upper_margin   = 0,
 340                 .lower_margin   = 0,
 341
 342                 .sync           = 0,
 343         },
 344 };
 345
 346 static struct pxafb_mach_info fb_info = {
 347         .modes                  = fb_mode_info,
 348         .num_modes              = 1,
 349         .lcd_conn               = LCD_COLOR_TFT_16BPP | LCD_PCLK_EDGE_FALL,
 350 };
 351
 352 static int viper_backlight_init(struct device *dev)
 353 {
 354         int ret;
 355
 356         /* GPIO9 and 10 control FB backlight. Initialise to off */
 357         ret = gpio_request(VIPER_BCKLIGHT_EN_GPIO, "Backlight");
 358         if (ret)
 359                 goto err_request_bckl;
 360
 361         ret = gpio_request(VIPER_LCD_EN_GPIO, "LCD");
 362         if (ret)
 363                 goto err_request_lcd;
 364
 365         ret = gpio_direction_output(VIPER_BCKLIGHT_EN_GPIO, 0);
 366         if (ret)
 367                 goto err_dir;
 368
 369         ret = gpio_direction_output(VIPER_LCD_EN_GPIO, 0);
 370         if (ret)
 371                 goto err_dir;
 372
 373         return 0;
 374
 375 err_dir:
 376         gpio_free(VIPER_LCD_EN_GPIO);
 377 err_request_lcd:
 378         gpio_free(VIPER_BCKLIGHT_EN_GPIO);
 379 err_request_bckl:
 380         dev_err(dev, "Failed to setup LCD GPIOs\n");
 381
 382         return ret;
 383 }
 384
 385 static int viper_backlight_notify(struct device *dev, int brightness)
 386 {
 387         gpio_set_value(VIPER_LCD_EN_GPIO, !!brightness);
 388         gpio_set_value(VIPER_BCKLIGHT_EN_GPIO, !!brightness);
 389
 390         return brightness;
 391 }
 392
 393 static void viper_backlight_exit(struct device *dev)
 394 {
 395         gpio_free(VIPER_LCD_EN_GPIO);
 396         gpio_free(VIPER_BCKLIGHT_EN_GPIO);
 397 }
 398
 399 static struct platform_pwm_backlight_data viper_backlight_data = {
 400         .pwm_id         = 0,
 401         .max_brightness = 100,
 402         .dft_brightness = 100,
 403         .pwm_period_ns  = 1000000,
 404         .enable_gpio    = -1,
 405         .init           = viper_backlight_init,
 406         .notify         = viper_backlight_notify,
 407         .exit           = viper_backlight_exit,
 408 };
 409
 410 static struct platform_device viper_backlight_device = {
 411         .name           = "pwm-backlight",
 412         .dev            = {
 413                 .parent         = &pxa25x_device_pwm0.dev,
 414                 .platform_data  = &viper_backlight_data,
 415         },
 416 };
 417
 418 /* Ethernet */
 419 static struct resource smc91x_resources[] = {
 420         [0] = {
 421                 .name   = "smc91x-regs",
 422                 .start  = VIPER_ETH_PHYS + 0x300,
 423                 .end    = VIPER_ETH_PHYS + 0x30f,
 424                 .flags  = IORESOURCE_MEM,
 425         },
 426         [1] = {
 427                 .start  = PXA_GPIO_TO_IRQ(VIPER_ETH_GPIO),
 428                 .end    = PXA_GPIO_TO_IRQ(VIPER_ETH_GPIO),
 429                 .flags  = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
 430         },
 431         [2] = {
 432                 .name   = "smc91x-data32",
 433                 .start  = VIPER_ETH_DATA_PHYS,
 434                 .end    = VIPER_ETH_DATA_PHYS + 3,
 435                 .flags  = IORESOURCE_MEM,
 436         },
 437 };
 438
 439 static struct smc91x_platdata viper_smc91x_info = {
 440         .flags  = SMC91X_USE_16BIT | SMC91X_NOWAIT,
 441         .leda   = RPC_LED_100_10,
 442         .ledb   = RPC_LED_TX_RX,
 443 };
 444
 445 static struct platform_device smc91x_device = {
 446         .name           = "smc91x",
 447         .id             = -1,
 448         .num_resources  = ARRAY_SIZE(smc91x_resources),
 449         .resource       = smc91x_resources,
 450         .dev            = {
 451                 .platform_data  = &viper_smc91x_info,
 452         },
 453 };
 454
 455 /* i2c */
 456 static struct i2c_gpio_platform_data i2c_bus_data = {
 457         .sda_pin = VIPER_RTC_I2C_SDA_GPIO,
 458         .scl_pin = VIPER_RTC_I2C_SCL_GPIO,
 459         .udelay  = 10,
 460         .timeout = HZ,
 461 };
 462
 463 static struct platform_device i2c_bus_device = {
 464         .name           = "i2c-gpio",
 465         .id             = 1, /* pxa2xx-i2c is bus 0, so start at 1 */
 466         .dev = {
 467                 .platform_data = &i2c_bus_data,
 468         }
 469 };
 470
 471 static struct i2c_board_info __initdata viper_i2c_devices[] = {
 472         {
 473                 I2C_BOARD_INFO("ds1338", 0x68),
 474         },
 475 };
 476
 477 /*
 478  * Serial configuration:
 479  * You can either have the standard PXA ports driven by the PXA driver,
 480  * or all the ports (PXA + 16850) driven by the 8250 driver.
 481  * Choose your poison.
 482  */
 483
 484 static struct resource viper_serial_resources[] = {
 485 #ifndef CONFIG_SERIAL_PXA
 486         {
 487                 .start  = 0x40100000,
 488                 .end    = 0x4010001f,
 489                 .flags  = IORESOURCE_MEM,
 490         },
 491         {
 492                 .start  = 0x40200000,
 493                 .end    = 0x4020001f,
 494                 .flags  = IORESOURCE_MEM,
 495         },
 496         {
 497                 .start  = 0x40700000,
 498                 .end    = 0x4070001f,
 499                 .flags  = IORESOURCE_MEM,
 500         },
 501         {
 502                 .start  = VIPER_UARTA_PHYS,
 503                 .end    = VIPER_UARTA_PHYS + 0xf,
 504                 .flags  = IORESOURCE_MEM,
 505         },
 506         {
 507                 .start  = VIPER_UARTB_PHYS,
 508                 .end    = VIPER_UARTB_PHYS + 0xf,
 509                 .flags  = IORESOURCE_MEM,
 510         },
 511 #else
 512         {
 513                 0,
 514         },
 515 #endif
 516 };
 517
 518 static struct plat_serial8250_port serial_platform_data[] = {
 519 #ifndef CONFIG_SERIAL_PXA
 520         /* Internal UARTs */
 521         {
 522                 .membase        = (void *)&FFUART,
 523                 .mapbase        = __PREG(FFUART),
 524                 .irq            = IRQ_FFUART,
 525                 .uartclk        = 921600 * 16,
 526                 .regshift       = 2,
 527                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
 528                 .iotype         = UPIO_MEM,
 529         },
 530         {
 531                 .membase        = (void *)&BTUART,
 532                 .mapbase        = __PREG(BTUART),
 533                 .irq            = IRQ_BTUART,
 534                 .uartclk        = 921600 * 16,
 535                 .regshift       = 2,
 536                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
 537                 .iotype         = UPIO_MEM,
 538         },
 539         {
 540                 .membase        = (void *)&STUART,
 541                 .mapbase        = __PREG(STUART),
 542                 .irq            = IRQ_STUART,
 543                 .uartclk        = 921600 * 16,
 544                 .regshift       = 2,
 545                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
 546                 .iotype         = UPIO_MEM,
 547         },
 548         /* External UARTs */
 549         {
 550                 .mapbase        = VIPER_UARTA_PHYS,
 551                 .irq            = PXA_GPIO_TO_IRQ(VIPER_UARTA_GPIO),
 552                 .irqflags       = IRQF_TRIGGER_RISING,
 553                 .uartclk        = 1843200,
 554                 .regshift       = 1,
 555                 .iotype         = UPIO_MEM,
 556                 .flags          = UPF_BOOT_AUTOCONF | UPF_IOREMAP |
 557                                   UPF_SKIP_TEST,
 558         },
 559         {
 560                 .mapbase        = VIPER_UARTB_PHYS,
 561                 .irq            = PXA_GPIO_TO_IRQ(VIPER_UARTB_GPIO),
 562                 .irqflags       = IRQF_TRIGGER_RISING,
 563                 .uartclk        = 1843200,
 564                 .regshift       = 1,
 565                 .iotype         = UPIO_MEM,
 566                 .flags          = UPF_BOOT_AUTOCONF | UPF_IOREMAP |
 567                                   UPF_SKIP_TEST,
 568         },
 569 #endif
 570         { },
 571 };
 572
 573 static struct platform_device serial_device = {
 574         .name                   = "serial8250",
 575         .id                     = 0,
 576         .dev                    = {
 577                 .platform_data  = serial_platform_data,
 578         },
 579         .num_resources          = ARRAY_SIZE(viper_serial_resources),
 580         .resource               = viper_serial_resources,
 581 };
 582
 583 /* USB */
 584 static void isp116x_delay(struct device *dev, int delay)
 585 {
 586         ndelay(delay);
 587 }
 588
 589 static struct resource isp116x_resources[] = {
 590         [0] = { /* DATA */
 591                 .start  = VIPER_USB_PHYS + 0,
 592                 .end    = VIPER_USB_PHYS + 1,
 593                 .flags  = IORESOURCE_MEM,
 594         },
 595         [1] = { /* ADDR */
 596                 .start  = VIPER_USB_PHYS + 2,
 597                 .end    = VIPER_USB_PHYS + 3,
 598                 .flags  = IORESOURCE_MEM,
 599         },
 600         [2] = {
 601                 .start  = PXA_GPIO_TO_IRQ(VIPER_USB_GPIO),
 602                 .end    = PXA_GPIO_TO_IRQ(VIPER_USB_GPIO),
 603                 .flags  = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
 604         },
 605 };
 606
 607 /* (DataBusWidth16|AnalogOCEnable|DREQOutputPolarity|DownstreamPort15KRSel ) */
 608 static struct isp116x_platform_data isp116x_platform_data = {
 609         /* Enable internal resistors on downstream ports */
 610         .sel15Kres              = 1,
 611         /* On-chip overcurrent protection */
 612         .oc_enable              = 1,
 613         /* INT output polarity */
 614         .int_act_high           = 1,
 615         /* INT edge or level triggered */
 616         .int_edge_triggered     = 0,
 617
 618         /* WAKEUP pin connected - NOT SUPPORTED  */
 619         /* .remote_wakeup_connected = 0, */
 620         /* Wakeup by devices on usb bus enabled */
 621         .remote_wakeup_enable   = 0,
 622         .delay                  = isp116x_delay,
 623 };
 624
 625 static struct platform_device isp116x_device = {
 626         .name                   = "isp116x-hcd",
 627         .id                     = -1,
 628         .num_resources          = ARRAY_SIZE(isp116x_resources),
 629         .resource               = isp116x_resources,
 630         .dev                    = {
 631                 .platform_data  = &isp116x_platform_data,
 632         },
 633
 634 };
 635
 636 /* MTD */
 637 static struct resource mtd_resources[] = {
 638         [0] = { /* RedBoot config + filesystem flash */
 639                 .start  = VIPER_FLASH_PHYS,
 640                 .end    = VIPER_FLASH_PHYS + SZ_32M - 1,
 641                 .flags  = IORESOURCE_MEM,
 642         },
 643         [1] = { /* Boot flash */
 644                 .start  = VIPER_BOOT_PHYS,
 645                 .end    = VIPER_BOOT_PHYS + SZ_1M - 1,
 646                 .flags  = IORESOURCE_MEM,
 647         },
 648         [2] = { /*
 649                  * SRAM size is actually 256KB, 8bits, with a sparse mapping
 650                  * (each byte is on a 16bit boundary).
 651                  */
 652                 .start  = _VIPER_SRAM_BASE,
 653                 .end    = _VIPER_SRAM_BASE + SZ_512K - 1,
 654                 .flags  = IORESOURCE_MEM,
 655         },
 656 };
 657
 658 static struct mtd_partition viper_boot_flash_partition = {
 659         .name           = "RedBoot",
 660         .size           = SZ_1M,
 661         .offset         = 0,
 662         .mask_flags     = MTD_WRITEABLE,        /* force R/O */
 663 };
 664
 665 static struct physmap_flash_data viper_flash_data[] = {
 666         [0] = {
 667                 .width          = 2,
 668                 .parts          = NULL,
 669                 .nr_parts       = 0,
 670         },
 671         [1] = {
 672                 .width          = 2,
 673                 .parts          = &viper_boot_flash_partition,
 674                 .nr_parts       = 1,
 675         },
 676 };
 677
 678 static struct platform_device viper_mtd_devices[] = {
 679         [0] = {
 680                 .name           = "physmap-flash",
 681                 .id             = 0,
 682                 .dev            = {
 683                         .platform_data  = &viper_flash_data[0],
 684                 },
 685                 .resource       = &mtd_resources[0],
 686                 .num_resources  = 1,
 687         },
 688         [1] = {
 689                 .name           = "physmap-flash",
 690                 .id             = 1,
 691                 .dev            = {
 692                         .platform_data  = &viper_flash_data[1],
 693                 },
 694                 .resource       = &mtd_resources[1],
 695                 .num_resources  = 1,
 696         },
 697 };
 698
 699 static struct platform_device *viper_devs[] __initdata = {
 700         &smc91x_device,
 701         &i2c_bus_device,
 702         &serial_device,
 703         &isp116x_device,
 704         &viper_mtd_devices[0],
 705         &viper_mtd_devices[1],
 706         &viper_backlight_device,
 707         &viper_pcmcia_device,
 708 };
 709
 710 static mfp_cfg_t viper_pin_config[] __initdata = {
 711         /* Chip selects */
 712         GPIO15_nCS_1,
 713         GPIO78_nCS_2,
 714         GPIO79_nCS_3,
 715         GPIO80_nCS_4,
 716         GPIO33_nCS_5,
 717
 718         /* AC97 */
 719         GPIO28_AC97_BITCLK,
 720         GPIO29_AC97_SDATA_IN_0,
 721         GPIO30_AC97_SDATA_OUT,
 722         GPIO31_AC97_SYNC,
 723
 724         /* FP Backlight */
 725         GPIO9_GPIO,                             /* VIPER_BCKLIGHT_EN_GPIO */
 726         GPIO10_GPIO,                            /* VIPER_LCD_EN_GPIO */
 727         GPIO16_PWM0_OUT,
 728
 729         /* Ethernet PHY Ready */
 730         GPIO18_RDY,
 731
 732         /* Serial shutdown */
 733         GPIO12_GPIO | MFP_LPM_DRIVE_HIGH,       /* VIPER_UART_SHDN_GPIO */
 734
 735         /* Compact-Flash / PC104 */
 736         GPIO48_nPOE,
 737         GPIO49_nPWE,
 738         GPIO50_nPIOR,
 739         GPIO51_nPIOW,
 740         GPIO52_nPCE_1,
 741         GPIO53_nPCE_2,
 742         GPIO54_nPSKTSEL,
 743         GPIO55_nPREG,
 744         GPIO56_nPWAIT,
 745         GPIO57_nIOIS16,
 746         GPIO8_GPIO,                             /* VIPER_CF_RDY_GPIO */
 747         GPIO32_GPIO,                            /* VIPER_CF_CD_GPIO */
 748         GPIO82_GPIO,                            /* VIPER_CF_POWER_GPIO */
 749
 750         /* Integrated UPS control */
 751         GPIO20_GPIO,                            /* VIPER_UPS_GPIO */
 752
 753         /* Vcc regulator control */
 754         GPIO6_GPIO,                             /* VIPER_PSU_DATA_GPIO */
 755         GPIO11_GPIO,                            /* VIPER_PSU_CLK_GPIO */
 756         GPIO19_GPIO,                            /* VIPER_PSU_nCS_LD_GPIO */
 757
 758         /* i2c busses */
 759         GPIO26_GPIO,                            /* VIPER_TPM_I2C_SDA_GPIO */
 760         GPIO27_GPIO,                            /* VIPER_TPM_I2C_SCL_GPIO */
 761         GPIO83_GPIO,                            /* VIPER_RTC_I2C_SDA_GPIO */
 762         GPIO84_GPIO,                            /* VIPER_RTC_I2C_SCL_GPIO */
 763
 764         /* PC/104 Interrupt */
 765         GPIO1_GPIO | WAKEUP_ON_EDGE_RISE,       /* VIPER_CPLD_GPIO */
 766 };
 767
 768 static unsigned long viper_tpm;
 769
 770 static int __init viper_tpm_setup(char *str)
 771 {
 772         return kstrtoul(str, 10, &viper_tpm) >= 0;
 773 }
 774
 775 __setup("tpm=", viper_tpm_setup);
 776
 777 static void __init viper_tpm_init(void)
 778 {
 779         struct platform_device *tpm_device;
 780         struct i2c_gpio_platform_data i2c_tpm_data = {
 781                 .sda_pin = VIPER_TPM_I2C_SDA_GPIO,
 782                 .scl_pin = VIPER_TPM_I2C_SCL_GPIO,
 783                 .udelay  = 10,
 784                 .timeout = HZ,
 785         };
 786         char *errstr;
 787
 788         /* Allocate TPM i2c bus if requested */
 789         if (!viper_tpm)
 790                 return;
 791
 792         tpm_device = platform_device_alloc("i2c-gpio", 2);
 793         if (tpm_device) {
 794                 if (!platform_device_add_data(tpm_device,
 795                                               &i2c_tpm_data,
 796                                               sizeof(i2c_tpm_data))) {
 797                         if (platform_device_add(tpm_device)) {
 798                                 errstr = "register TPM i2c bus";
 799                                 goto error_free_tpm;
 800                         }
 801                 } else {
 802                         errstr = "allocate TPM i2c bus data";
 803                         goto error_free_tpm;
 804                 }
 805         } else {
 806                 errstr = "allocate TPM i2c device";
 807                 goto error_tpm;
 808         }
 809
 810         return;
 811
 812 error_free_tpm:
 813         kfree(tpm_device);
 814 error_tpm:
 815         pr_err("viper: Couldn't %s, giving up\n", errstr);
 816 }
 817
 818 static void __init viper_init_vcore_gpios(void)
 819 {
 820         if (gpio_request(VIPER_PSU_DATA_GPIO, "PSU data"))
 821                 goto err_request_data;
 822
 823         if (gpio_request(VIPER_PSU_CLK_GPIO, "PSU clock"))
 824                 goto err_request_clk;
 825
 826         if (gpio_request(VIPER_PSU_nCS_LD_GPIO, "PSU cs"))
 827                 goto err_request_cs;
 828
 829         if (gpio_direction_output(VIPER_PSU_DATA_GPIO, 0) ||
 830             gpio_direction_output(VIPER_PSU_CLK_GPIO, 0) ||
 831             gpio_direction_output(VIPER_PSU_nCS_LD_GPIO, 0))
 832                 goto err_dir;
 833
 834         /* c/should assume redboot set the correct level ??? */
 835         viper_set_core_cpu_voltage(get_clk_frequency_khz(0), 1);
 836
 837         return;
 838
 839 err_dir:
 840         gpio_free(VIPER_PSU_nCS_LD_GPIO);
 841 err_request_cs:
 842         gpio_free(VIPER_PSU_CLK_GPIO);
 843 err_request_clk:
 844         gpio_free(VIPER_PSU_DATA_GPIO);
 845 err_request_data:
 846         pr_err("viper: Failed to setup vcore control GPIOs\n");
 847 }
 848
 849 static void __init viper_init_serial_gpio(void)
 850 {
 851         if (gpio_request(VIPER_UART_SHDN_GPIO, "UARTs shutdown"))
 852                 goto err_request;
 853
 854         if (gpio_direction_output(VIPER_UART_SHDN_GPIO, 0))
 855                 goto err_dir;
 856
 857         return;
 858
 859 err_dir:
 860         gpio_free(VIPER_UART_SHDN_GPIO);
 861 err_request:
 862         pr_err("viper: Failed to setup UART shutdown GPIO\n");
 863 }
 864
 865 #ifdef CONFIG_CPU_FREQ
 866 static int viper_cpufreq_notifier(struct notifier_block *nb,
 867                                   unsigned long val, void *data)
 868 {
 869         struct cpufreq_freqs *freq = data;
 870
 871         /* TODO: Adjust timings??? */
 872
 873         switch (val) {
 874         case CPUFREQ_PRECHANGE:
 875                 if (freq->old < freq->new) {
 876                         /* we are getting faster so raise the voltage
 877                          * before we change freq */
 878                         viper_set_core_cpu_voltage(freq->new, 0);
 879                 }
 880                 break;
 881         case CPUFREQ_POSTCHANGE:
 882                 if (freq->old > freq->new) {
 883                         /* we are slowing down so drop the power
 884                          * after we change freq */
 885                         viper_set_core_cpu_voltage(freq->new, 0);
 886                 }
 887                 break;
 888         default:
 889                 /* ignore */
 890                 break;
 891         }
 892
 893         return 0;
 894 }
 895
 896 static struct notifier_block viper_cpufreq_notifier_block = {
 897         .notifier_call  = viper_cpufreq_notifier
 898 };
 899
 900 static void __init viper_init_cpufreq(void)
 901 {
 902         if (cpufreq_register_notifier(&viper_cpufreq_notifier_block,
 903                                       CPUFREQ_TRANSITION_NOTIFIER))
 904                 pr_err("viper: Failed to setup cpufreq notifier\n");
 905 }
 906 #else
 907 static inline void viper_init_cpufreq(void) {}
 908 #endif
 909
 910 static void viper_power_off(void)
 911 {
 912         pr_notice("Shutting off UPS\n");
 913         gpio_set_value(VIPER_UPS_GPIO, 1);
 914         /* Spin to death... */
 915         while (1);
 916 }
 917
 918 static void __init viper_init(void)
 919 {
 920         u8 version;
 921
 922         pm_power_off = viper_power_off;
 923
 924         pxa2xx_mfp_config(ARRAY_AND_SIZE(viper_pin_config));
 925
 926         pxa_set_ffuart_info(NULL);
 927         pxa_set_btuart_info(NULL);
 928         pxa_set_stuart_info(NULL);
 929
 930         /* Wake-up serial console */
 931         viper_init_serial_gpio();
 932
 933         pxa_set_fb_info(NULL, &fb_info);
 934
 935         /* v1 hardware cannot use the datacs line */
 936         version = viper_hw_version();
 937         if (version == 0)
 938                 smc91x_device.num_resources--;
 939
 940         pxa_set_i2c_info(NULL);
 941         platform_add_devices(viper_devs, ARRAY_SIZE(viper_devs));
 942
 943         viper_init_vcore_gpios();
 944         viper_init_cpufreq();
 945
 946         register_syscore_ops(&viper_cpu_syscore_ops);
 947
 948         if (version) {
 949                 pr_info("viper: hardware v%di%d detected. "
 950                         "CPLD revision %d.\n",
 951                         VIPER_BOARD_VERSION(version),
 952                         VIPER_BOARD_ISSUE(version),
 953                         VIPER_CPLD_REVISION(version));
 954                 system_rev = (VIPER_BOARD_VERSION(version) << 8) |
 955                              (VIPER_BOARD_ISSUE(version) << 4) |
 956                              VIPER_CPLD_REVISION(version);
 957         } else {
 958                 pr_info("viper: No version register.\n");
 959         }
 960
 961         i2c_register_board_info(1, ARRAY_AND_SIZE(viper_i2c_devices));
 962
 963         viper_tpm_init();
 964         pxa_set_ac97_info(NULL);
 965 }
 966
 967 static struct map_desc viper_io_desc[] __initdata = {
 968         {
 969                 .virtual = VIPER_CPLD_BASE,
 970                 .pfn     = __phys_to_pfn(VIPER_CPLD_PHYS),
 971                 .length  = 0x00300000,
 972                 .type    = MT_DEVICE,
 973         },
 974         {
 975                 .virtual = VIPER_PC104IO_BASE,
 976                 .pfn     = __phys_to_pfn(0x30000000),
 977                 .length  = 0x00800000,
 978                 .type    = MT_DEVICE,
 979         },
 980 };
 981
 982 static void __init viper_map_io(void)
 983 {
 984         pxa25x_map_io();
 985
 986         iotable_init(viper_io_desc, ARRAY_SIZE(viper_io_desc));
 987
 988         PCFR |= PCFR_OPDE;
 989 }
 990
 991 MACHINE_START(VIPER, "Arcom/Eurotech VIPER SBC")
 992         /* Maintainer: Marc Zyngier <maz@misterjones.org> */
 993         .atag_offset    = 0x100,
 994         .map_io         = viper_map_io,
 995         .nr_irqs        = PXA_NR_IRQS,
 996         .init_irq       = viper_init_irq,
 997         .handle_irq     = pxa25x_handle_irq,
 998         .init_time      = pxa_timer_init,
 999         .init_machine   = viper_init,
1000         .restart        = pxa_restart,
1001 MACHINE_END