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
  48 #include <mach/pxa25x.h>
  49 #include <mach/audio.h>
  50 #include <mach/pxafb.h>
  51 #include <mach/regs-uart.h>
  52 #include <mach/arcom-pcmcia.h>
  53 #include <mach/viper.h>
  54
  55 #include <asm/setup.h>
  56 #include <asm/mach-types.h>
  57 #include <asm/irq.h>
  58 #include <asm/sizes.h>
  59
  60 #include <asm/mach/arch.h>
  61 #include <asm/mach/map.h>
  62 #include <asm/mach/irq.h>
  63
  64 #include "generic.h"
  65 #include "devices.h"
  66
  67 static unsigned int icr;
  68
  69 static void viper_icr_set_bit(unsigned int bit)
  70 {
  71         icr |= bit;
  72         VIPER_ICR = icr;
  73 }
  74
  75 static void viper_icr_clear_bit(unsigned int bit)
  76 {
  77         icr &= ~bit;
  78         VIPER_ICR = icr;
  79 }
  80
  81 /* This function is used from the pcmcia module to reset the CF */
  82 static void viper_cf_reset(int state)
  83 {
  84         if (state)
  85                 viper_icr_set_bit(VIPER_ICR_CF_RST);
  86         else
  87                 viper_icr_clear_bit(VIPER_ICR_CF_RST);
  88 }
  89
  90 static struct arcom_pcmcia_pdata viper_pcmcia_info = {
  91         .cd_gpio        = VIPER_CF_CD_GPIO,
  92         .rdy_gpio       = VIPER_CF_RDY_GPIO,
  93         .pwr_gpio       = VIPER_CF_POWER_GPIO,
  94         .reset          = viper_cf_reset,
  95 };
  96
  97 static struct platform_device viper_pcmcia_device = {
  98         .name           = "viper-pcmcia",
  99         .id             = -1,
 100         .dev            = {
 101                 .platform_data  = &viper_pcmcia_info,
 102         },
 103 };
 104
 105 /*
 106  * The CPLD version register was not present on VIPER boards prior to
 107  * v2i1. On v1 boards where the version register is not present we
 108  * will just read back the previous value from the databus.
 109  *
 110  * Therefore we do two reads. The first time we write 0 to the
 111  * (read-only) register before reading and the second time we write
 112  * 0xff first. If the two reads do not match or they read back as 0xff
 113  * or 0x00 then we have version 1 hardware.
 114  */
 115 static u8 viper_hw_version(void)
 116 {
 117         u8 v1, v2;
 118         unsigned long flags;
 119
 120         local_irq_save(flags);
 121
 122         VIPER_VERSION = 0;
 123         v1 = VIPER_VERSION;
 124         VIPER_VERSION = 0xff;
 125         v2 = VIPER_VERSION;
 126
 127         v1 = (v1 != v2 || v1 == 0xff) ? 0 : v1;
 128
 129         local_irq_restore(flags);
 130         return v1;
 131 }
 132
 133 /* CPU sysdev */
 134 static int viper_cpu_suspend(struct sys_device *sysdev, pm_message_t state)
 135 {
 136         viper_icr_set_bit(VIPER_ICR_R_DIS);
 137         return 0;
 138 }
 139
 140 static int viper_cpu_resume(struct sys_device *sysdev)
 141 {
 142         viper_icr_clear_bit(VIPER_ICR_R_DIS);
 143         return 0;
 144 }
 145
 146 static struct sysdev_driver viper_cpu_sysdev_driver = {
 147         .suspend        = viper_cpu_suspend,
 148         .resume         = viper_cpu_resume,
 149 };
 150
 151 static unsigned int current_voltage_divisor;
 152
 153 /*
 154  * If force is not true then step from existing to new divisor. If
 155  * force is true then jump straight to the new divisor. Stepping is
 156  * used because if the jump in voltage is too large, the VCC can dip
 157  * too low and the regulator cuts out.
 158  *
 159  * force can be used to initialize the divisor to a know state by
 160  * setting the value for the current clock speed, since we are already
 161  * running at that speed we know the voltage should be pretty close so
 162  * the jump won't be too large
 163  */
 164 static void viper_set_core_cpu_voltage(unsigned long khz, int force)
 165 {
 166         int i = 0;
 167         unsigned int divisor = 0;
 168         const char *v;
 169
 170         if (khz < 200000) {
 171                 v = "1.0"; divisor = 0xfff;
 172         } else if (khz < 300000) {
 173                 v = "1.1"; divisor = 0xde5;
 174         } else {
 175                 v = "1.3"; divisor = 0x325;
 176         }
 177
 178         pr_debug("viper: setting CPU core voltage to %sV at %d.%03dMHz\n",
 179                  v, (int)khz / 1000, (int)khz % 1000);
 180
 181 #define STEP 0x100
 182         do {
 183                 int step;
 184
 185                 if (force)
 186                         step = divisor;
 187                 else if (current_voltage_divisor < divisor - STEP)
 188                         step = current_voltage_divisor + STEP;
 189                 else if (current_voltage_divisor > divisor + STEP)
 190                         step = current_voltage_divisor - STEP;
 191                 else
 192                         step = divisor;
 193                 force = 0;
 194
 195                 gpio_set_value(VIPER_PSU_CLK_GPIO, 0);
 196                 gpio_set_value(VIPER_PSU_nCS_LD_GPIO, 0);
 197
 198                 for (i = 1 << 11 ; i > 0 ; i >>= 1) {
 199                         udelay(1);
 200
 201                         gpio_set_value(VIPER_PSU_DATA_GPIO, step & i);
 202                         udelay(1);
 203
 204                         gpio_set_value(VIPER_PSU_CLK_GPIO, 1);
 205                         udelay(1);
 206
 207                         gpio_set_value(VIPER_PSU_CLK_GPIO, 0);
 208                 }
 209                 udelay(1);
 210
 211                 gpio_set_value(VIPER_PSU_nCS_LD_GPIO, 1);
 212                 udelay(1);
 213
 214                 gpio_set_value(VIPER_PSU_nCS_LD_GPIO, 0);
 215
 216                 current_voltage_divisor = step;
 217         } while (current_voltage_divisor != divisor);
 218 }
 219
 220 /* Interrupt handling */
 221 static unsigned long viper_irq_enabled_mask;
 222 static const int viper_isa_irqs[] = { 3, 4, 5, 6, 7, 10, 11, 12, 9, 14, 15 };
 223 static const int viper_isa_irq_map[] = {
 224         0,              /* ISA irq #0, invalid */
 225         0,              /* ISA irq #1, invalid */
 226         0,              /* ISA irq #2, invalid */
 227         1 << 0,         /* ISA irq #3 */
 228         1 << 1,         /* ISA irq #4 */
 229         1 << 2,         /* ISA irq #5 */
 230         1 << 3,         /* ISA irq #6 */
 231         1 << 4,         /* ISA irq #7 */
 232         0,              /* ISA irq #8, invalid */
 233         1 << 8,         /* ISA irq #9 */
 234         1 << 5,         /* ISA irq #10 */
 235         1 << 6,         /* ISA irq #11 */
 236         1 << 7,         /* ISA irq #12 */
 237         0,              /* ISA irq #13, invalid */
 238         1 << 9,         /* ISA irq #14 */
 239         1 << 10,        /* ISA irq #15 */
 240 };
 241
 242 static inline int viper_irq_to_bitmask(unsigned int irq)
 243 {
 244         return viper_isa_irq_map[irq - PXA_ISA_IRQ(0)];
 245 }
 246
 247 static inline int viper_bit_to_irq(int bit)
 248 {
 249         return viper_isa_irqs[bit] + PXA_ISA_IRQ(0);
 250 }
 251
 252 static void viper_ack_irq(struct irq_data *d)
 253 {
 254         int viper_irq = viper_irq_to_bitmask(d->irq);
 255
 256         if (viper_irq & 0xff)
 257                 VIPER_LO_IRQ_STATUS = viper_irq;
 258         else
 259                 VIPER_HI_IRQ_STATUS = (viper_irq >> 8);
 260 }
 261
 262 static void viper_mask_irq(struct irq_data *d)
 263 {
 264         viper_irq_enabled_mask &= ~(viper_irq_to_bitmask(d->irq));
 265 }
 266
 267 static void viper_unmask_irq(struct irq_data *d)
 268 {
 269         viper_irq_enabled_mask |= viper_irq_to_bitmask(d->irq);
 270 }
 271
 272 static inline unsigned long viper_irq_pending(void)
 273 {
 274         return (VIPER_HI_IRQ_STATUS << 8 | VIPER_LO_IRQ_STATUS) &
 275                         viper_irq_enabled_mask;
 276 }
 277
 278 static void viper_irq_handler(unsigned int irq, struct irq_desc *desc)
 279 {
 280         unsigned long pending;
 281
 282         pending = viper_irq_pending();
 283         do {
 284                 /* we're in a chained irq handler,
 285                  * so ack the interrupt by hand */
 286                 desc->irq_data.chip->irq_ack(&desc->irq_data);
 287
 288                 if (likely(pending)) {
 289                         irq = viper_bit_to_irq(__ffs(pending));
 290                         generic_handle_irq(irq);
 291                 }
 292                 pending = viper_irq_pending();
 293         } while (pending);
 294 }
 295
 296 static struct irq_chip viper_irq_chip = {
 297         .name           = "ISA",
 298         .irq_ack        = viper_ack_irq,
 299         .irq_mask       = viper_mask_irq,
 300         .irq_unmask     = viper_unmask_irq
 301 };
 302
 303 static void __init viper_init_irq(void)
 304 {
 305         int level;
 306         int isa_irq;
 307
 308         pxa25x_init_irq();
 309
 310         /* setup ISA IRQs */
 311         for (level = 0; level < ARRAY_SIZE(viper_isa_irqs); level++) {
 312                 isa_irq = viper_bit_to_irq(level);
 313                 set_irq_chip(isa_irq, &viper_irq_chip);
 314                 set_irq_handler(isa_irq, handle_edge_irq);
 315                 set_irq_flags(isa_irq, IRQF_VALID | IRQF_PROBE);
 316         }
 317
 318         set_irq_chained_handler(gpio_to_irq(VIPER_CPLD_GPIO),
 319                                 viper_irq_handler);
 320         set_irq_type(gpio_to_irq(VIPER_CPLD_GPIO), IRQ_TYPE_EDGE_BOTH);
 321 }
 322
 323 /* Flat Panel */
 324 static struct pxafb_mode_info fb_mode_info[] = {
 325         {
 326                 .pixclock       = 157500,
 327
 328                 .xres           = 320,
 329                 .yres           = 240,
 330
 331                 .bpp            = 16,
 332
 333                 .hsync_len      = 63,
 334                 .left_margin    = 7,
 335                 .right_margin   = 13,
 336
 337                 .vsync_len      = 20,
 338                 .upper_margin   = 0,
 339                 .lower_margin   = 0,
 340
 341                 .sync           = 0,
 342         },
 343 };
 344
 345 static struct pxafb_mach_info fb_info = {
 346         .modes                  = fb_mode_info,
 347         .num_modes              = 1,
 348         .lcd_conn               = LCD_COLOR_TFT_16BPP | LCD_PCLK_EDGE_FALL,
 349 };
 350
 351 static int viper_backlight_init(struct device *dev)
 352 {
 353         int ret;
 354
 355         /* GPIO9 and 10 control FB backlight. Initialise to off */
 356         ret = gpio_request(VIPER_BCKLIGHT_EN_GPIO, "Backlight");
 357         if (ret)
 358                 goto err_request_bckl;
 359
 360         ret = gpio_request(VIPER_LCD_EN_GPIO, "LCD");
 361         if (ret)
 362                 goto err_request_lcd;
 363
 364         ret = gpio_direction_output(VIPER_BCKLIGHT_EN_GPIO, 0);
 365         if (ret)
 366                 goto err_dir;
 367
 368         ret = gpio_direction_output(VIPER_LCD_EN_GPIO, 0);
 369         if (ret)
 370                 goto err_dir;
 371
 372         return 0;
 373
 374 err_dir:
 375         gpio_free(VIPER_LCD_EN_GPIO);
 376 err_request_lcd:
 377         gpio_free(VIPER_BCKLIGHT_EN_GPIO);
 378 err_request_bckl:
 379         dev_err(dev, "Failed to setup LCD GPIOs\n");
 380
 381         return ret;
 382 }
 383
 384 static int viper_backlight_notify(struct device *dev, int brightness)
 385 {
 386         gpio_set_value(VIPER_LCD_EN_GPIO, !!brightness);
 387         gpio_set_value(VIPER_BCKLIGHT_EN_GPIO, !!brightness);
 388
 389         return brightness;
 390 }
 391
 392 static void viper_backlight_exit(struct device *dev)
 393 {
 394         gpio_free(VIPER_LCD_EN_GPIO);
 395         gpio_free(VIPER_BCKLIGHT_EN_GPIO);
 396 }
 397
 398 static struct platform_pwm_backlight_data viper_backlight_data = {
 399         .pwm_id         = 0,
 400         .max_brightness = 100,
 401         .dft_brightness = 100,
 402         .pwm_period_ns  = 1000000,
 403         .init           = viper_backlight_init,
 404         .notify         = viper_backlight_notify,
 405         .exit           = viper_backlight_exit,
 406 };
 407
 408 static struct platform_device viper_backlight_device = {
 409         .name           = "pwm-backlight",
 410         .dev            = {
 411                 .parent         = &pxa25x_device_pwm0.dev,
 412                 .platform_data  = &viper_backlight_data,
 413         },
 414 };
 415
 416 /* Ethernet */
 417 static struct resource smc91x_resources[] = {
 418         [0] = {
 419                 .name   = "smc91x-regs",
 420                 .start  = VIPER_ETH_PHYS + 0x300,
 421                 .end    = VIPER_ETH_PHYS + 0x30f,
 422                 .flags  = IORESOURCE_MEM,
 423         },
 424         [1] = {
 425                 .start  = gpio_to_irq(VIPER_ETH_GPIO),
 426                 .end    = gpio_to_irq(VIPER_ETH_GPIO),
 427                 .flags  = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
 428         },
 429         [2] = {
 430                 .name   = "smc91x-data32",
 431                 .start  = VIPER_ETH_DATA_PHYS,
 432                 .end    = VIPER_ETH_DATA_PHYS + 3,
 433                 .flags  = IORESOURCE_MEM,
 434         },
 435 };
 436
 437 static struct smc91x_platdata viper_smc91x_info = {
 438         .flags  = SMC91X_USE_16BIT | SMC91X_NOWAIT,
 439         .leda   = RPC_LED_100_10,
 440         .ledb   = RPC_LED_TX_RX,
 441 };
 442
 443 static struct platform_device smc91x_device = {
 444         .name           = "smc91x",
 445         .id             = -1,
 446         .num_resources  = ARRAY_SIZE(smc91x_resources),
 447         .resource       = smc91x_resources,
 448         .dev            = {
 449                 .platform_data  = &viper_smc91x_info,
 450         },
 451 };
 452
 453 /* i2c */
 454 static struct i2c_gpio_platform_data i2c_bus_data = {
 455         .sda_pin = VIPER_RTC_I2C_SDA_GPIO,
 456         .scl_pin = VIPER_RTC_I2C_SCL_GPIO,
 457         .udelay  = 10,
 458         .timeout = HZ,
 459 };
 460
 461 static struct platform_device i2c_bus_device = {
 462         .name           = "i2c-gpio",
 463         .id             = 1, /* pxa2xx-i2c is bus 0, so start at 1 */
 464         .dev = {
 465                 .platform_data = &i2c_bus_data,
 466         }
 467 };
 468
 469 static struct i2c_board_info __initdata viper_i2c_devices[] = {
 470         {
 471                 I2C_BOARD_INFO("ds1338", 0x68),
 472         },
 473 };
 474
 475 /*
 476  * Serial configuration:
 477  * You can either have the standard PXA ports driven by the PXA driver,
 478  * or all the ports (PXA + 16850) driven by the 8250 driver.
 479  * Choose your poison.
 480  */
 481
 482 static struct resource viper_serial_resources[] = {
 483 #ifndef CONFIG_SERIAL_PXA
 484         {
 485                 .start  = 0x40100000,
 486                 .end    = 0x4010001f,
 487                 .flags  = IORESOURCE_MEM,
 488         },
 489         {
 490                 .start  = 0x40200000,
 491                 .end    = 0x4020001f,
 492                 .flags  = IORESOURCE_MEM,
 493         },
 494         {
 495                 .start  = 0x40700000,
 496                 .end    = 0x4070001f,
 497                 .flags  = IORESOURCE_MEM,
 498         },
 499         {
 500                 .start  = VIPER_UARTA_PHYS,
 501                 .end    = VIPER_UARTA_PHYS + 0xf,
 502                 .flags  = IORESOURCE_MEM,
 503         },
 504         {
 505                 .start  = VIPER_UARTB_PHYS,
 506                 .end    = VIPER_UARTB_PHYS + 0xf,
 507                 .flags  = IORESOURCE_MEM,
 508         },
 509 #else
 510         {
 511                 0,
 512         },
 513 #endif
 514 };
 515
 516 static struct plat_serial8250_port serial_platform_data[] = {
 517 #ifndef CONFIG_SERIAL_PXA
 518         /* Internal UARTs */
 519         {
 520                 .membase        = (void *)&FFUART,
 521                 .mapbase        = __PREG(FFUART),
 522                 .irq            = IRQ_FFUART,
 523                 .uartclk        = 921600 * 16,
 524                 .regshift       = 2,
 525                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
 526                 .iotype         = UPIO_MEM,
 527         },
 528         {
 529                 .membase        = (void *)&BTUART,
 530                 .mapbase        = __PREG(BTUART),
 531                 .irq            = IRQ_BTUART,
 532                 .uartclk        = 921600 * 16,
 533                 .regshift       = 2,
 534                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
 535                 .iotype         = UPIO_MEM,
 536         },
 537         {
 538                 .membase        = (void *)&STUART,
 539                 .mapbase        = __PREG(STUART),
 540                 .irq            = IRQ_STUART,
 541                 .uartclk        = 921600 * 16,
 542                 .regshift       = 2,
 543                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
 544                 .iotype         = UPIO_MEM,
 545         },
 546         /* External UARTs */
 547         {
 548                 .mapbase        = VIPER_UARTA_PHYS,
 549                 .irq            = gpio_to_irq(VIPER_UARTA_GPIO),
 550                 .irqflags       = IRQF_TRIGGER_RISING,
 551                 .uartclk        = 1843200,
 552                 .regshift       = 1,
 553                 .iotype         = UPIO_MEM,
 554                 .flags          = UPF_BOOT_AUTOCONF | UPF_IOREMAP |
 555                                   UPF_SKIP_TEST,
 556         },
 557         {
 558                 .mapbase        = VIPER_UARTB_PHYS,
 559                 .irq            = gpio_to_irq(VIPER_UARTB_GPIO),
 560                 .irqflags       = IRQF_TRIGGER_RISING,
 561                 .uartclk        = 1843200,
 562                 .regshift       = 1,
 563                 .iotype         = UPIO_MEM,
 564                 .flags          = UPF_BOOT_AUTOCONF | UPF_IOREMAP |
 565                                   UPF_SKIP_TEST,
 566         },
 567 #endif
 568         { },
 569 };
 570
 571 static struct platform_device serial_device = {
 572         .name                   = "serial8250",
 573         .id                     = 0,
 574         .dev                    = {
 575                 .platform_data  = serial_platform_data,
 576         },
 577         .num_resources          = ARRAY_SIZE(viper_serial_resources),
 578         .resource               = viper_serial_resources,
 579 };
 580
 581 /* USB */
 582 static void isp116x_delay(struct device *dev, int delay)
 583 {
 584         ndelay(delay);
 585 }
 586
 587 static struct resource isp116x_resources[] = {
 588         [0] = { /* DATA */
 589                 .start  = VIPER_USB_PHYS + 0,
 590                 .end    = VIPER_USB_PHYS + 1,
 591                 .flags  = IORESOURCE_MEM,
 592         },
 593         [1] = { /* ADDR */
 594                 .start  = VIPER_USB_PHYS + 2,
 595                 .end    = VIPER_USB_PHYS + 3,
 596                 .flags  = IORESOURCE_MEM,
 597         },
 598         [2] = {
 599                 .start  = gpio_to_irq(VIPER_USB_GPIO),
 600                 .end    = gpio_to_irq(VIPER_USB_GPIO),
 601                 .flags  = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
 602         },
 603 };
 604
 605 /* (DataBusWidth16|AnalogOCEnable|DREQOutputPolarity|DownstreamPort15KRSel ) */
 606 static struct isp116x_platform_data isp116x_platform_data = {
 607         /* Enable internal resistors on downstream ports */
 608         .sel15Kres              = 1,
 609         /* On-chip overcurrent protection */
 610         .oc_enable              = 1,
 611         /* INT output polarity */
 612         .int_act_high           = 1,
 613         /* INT edge or level triggered */
 614         .int_edge_triggered     = 0,
 615
 616         /* WAKEUP pin connected - NOT SUPPORTED  */
 617         /* .remote_wakeup_connected = 0, */
 618         /* Wakeup by devices on usb bus enabled */
 619         .remote_wakeup_enable   = 0,
 620         .delay                  = isp116x_delay,
 621 };
 622
 623 static struct platform_device isp116x_device = {
 624         .name                   = "isp116x-hcd",
 625         .id                     = -1,
 626         .num_resources          = ARRAY_SIZE(isp116x_resources),
 627         .resource               = isp116x_resources,
 628         .dev                    = {
 629                 .platform_data  = &isp116x_platform_data,
 630         },
 631
 632 };
 633
 634 /* MTD */
 635 static struct resource mtd_resources[] = {
 636         [0] = { /* RedBoot config + filesystem flash */
 637                 .start  = VIPER_FLASH_PHYS,
 638                 .end    = VIPER_FLASH_PHYS + SZ_32M - 1,
 639                 .flags  = IORESOURCE_MEM,
 640         },
 641         [1] = { /* Boot flash */
 642                 .start  = VIPER_BOOT_PHYS,
 643                 .end    = VIPER_BOOT_PHYS + SZ_1M - 1,
 644                 .flags  = IORESOURCE_MEM,
 645         },
 646         [2] = { /*
 647                  * SRAM size is actually 256KB, 8bits, with a sparse mapping
 648                  * (each byte is on a 16bit boundary).
 649                  */
 650                 .start  = _VIPER_SRAM_BASE,
 651                 .end    = _VIPER_SRAM_BASE + SZ_512K - 1,
 652                 .flags  = IORESOURCE_MEM,
 653         },
 654 };
 655
 656 static struct mtd_partition viper_boot_flash_partition = {
 657         .name           = "RedBoot",
 658         .size           = SZ_1M,
 659         .offset         = 0,
 660         .mask_flags     = MTD_WRITEABLE,        /* force R/O */
 661 };
 662
 663 static struct physmap_flash_data viper_flash_data[] = {
 664         [0] = {
 665                 .width          = 2,
 666                 .parts          = NULL,
 667                 .nr_parts       = 0,
 668         },
 669         [1] = {
 670                 .width          = 2,
 671                 .parts          = &viper_boot_flash_partition,
 672                 .nr_parts       = 1,
 673         },
 674 };
 675
 676 static struct platform_device viper_mtd_devices[] = {
 677         [0] = {
 678                 .name           = "physmap-flash",
 679                 .id             = 0,
 680                 .dev            = {
 681                         .platform_data  = &viper_flash_data[0],
 682                 },
 683                 .resource       = &mtd_resources[0],
 684                 .num_resources  = 1,
 685         },
 686         [1] = {
 687                 .name           = "physmap-flash",
 688                 .id             = 1,
 689                 .dev            = {
 690                         .platform_data  = &viper_flash_data[1],
 691                 },
 692                 .resource       = &mtd_resources[1],
 693                 .num_resources  = 1,
 694         },
 695 };
 696
 697 static struct platform_device *viper_devs[] __initdata = {
 698         &smc91x_device,
 699         &i2c_bus_device,
 700         &serial_device,
 701         &isp116x_device,
 702         &viper_mtd_devices[0],
 703         &viper_mtd_devices[1],
 704         &viper_backlight_device,
 705         &viper_pcmcia_device,
 706 };
 707
 708 static mfp_cfg_t viper_pin_config[] __initdata = {
 709         /* Chip selects */
 710         GPIO15_nCS_1,
 711         GPIO78_nCS_2,
 712         GPIO79_nCS_3,
 713         GPIO80_nCS_4,
 714         GPIO33_nCS_5,
 715
 716         /* AC97 */
 717         GPIO28_AC97_BITCLK,
 718         GPIO29_AC97_SDATA_IN_0,
 719         GPIO30_AC97_SDATA_OUT,
 720         GPIO31_AC97_SYNC,
 721
 722         /* FP Backlight */
 723         GPIO9_GPIO,                             /* VIPER_BCKLIGHT_EN_GPIO */
 724         GPIO10_GPIO,                            /* VIPER_LCD_EN_GPIO */
 725         GPIO16_PWM0_OUT,
 726
 727         /* Ethernet PHY Ready */
 728         GPIO18_RDY,
 729
 730         /* Serial shutdown */
 731         GPIO12_GPIO | MFP_LPM_DRIVE_HIGH,       /* VIPER_UART_SHDN_GPIO */
 732
 733         /* Compact-Flash / PC104 */
 734         GPIO48_nPOE,
 735         GPIO49_nPWE,
 736         GPIO50_nPIOR,
 737         GPIO51_nPIOW,
 738         GPIO52_nPCE_1,
 739         GPIO53_nPCE_2,
 740         GPIO54_nPSKTSEL,
 741         GPIO55_nPREG,
 742         GPIO56_nPWAIT,
 743         GPIO57_nIOIS16,
 744         GPIO8_GPIO,                             /* VIPER_CF_RDY_GPIO */
 745         GPIO32_GPIO,                            /* VIPER_CF_CD_GPIO */
 746         GPIO82_GPIO,                            /* VIPER_CF_POWER_GPIO */
 747
 748         /* Integrated UPS control */
 749         GPIO20_GPIO,                            /* VIPER_UPS_GPIO */
 750
 751         /* Vcc regulator control */
 752         GPIO6_GPIO,                             /* VIPER_PSU_DATA_GPIO */
 753         GPIO11_GPIO,                            /* VIPER_PSU_CLK_GPIO */
 754         GPIO19_GPIO,                            /* VIPER_PSU_nCS_LD_GPIO */
 755
 756         /* i2c busses */
 757         GPIO26_GPIO,                            /* VIPER_TPM_I2C_SDA_GPIO */
 758         GPIO27_GPIO,                            /* VIPER_TPM_I2C_SCL_GPIO */
 759         GPIO83_GPIO,                            /* VIPER_RTC_I2C_SDA_GPIO */
 760         GPIO84_GPIO,                            /* VIPER_RTC_I2C_SCL_GPIO */
 761
 762         /* PC/104 Interrupt */
 763         GPIO1_GPIO | WAKEUP_ON_EDGE_RISE,       /* VIPER_CPLD_GPIO */
 764 };
 765
 766 static unsigned long viper_tpm;
 767
 768 static int __init viper_tpm_setup(char *str)
 769 {
 770         strict_strtoul(str, 10, &viper_tpm);
 771         return 1;
 772 }
 773
 774 __setup("tpm=", viper_tpm_setup);
 775
 776 static void __init viper_tpm_init(void)
 777 {
 778         struct platform_device *tpm_device;
 779         struct i2c_gpio_platform_data i2c_tpm_data = {
 780                 .sda_pin = VIPER_TPM_I2C_SDA_GPIO,
 781                 .scl_pin = VIPER_TPM_I2C_SCL_GPIO,
 782                 .udelay  = 10,
 783                 .timeout = HZ,
 784         };
 785         char *errstr;
 786
 787         /* Allocate TPM i2c bus if requested */
 788         if (!viper_tpm)
 789                 return;
 790
 791         tpm_device = platform_device_alloc("i2c-gpio", 2);
 792         if (tpm_device) {
 793                 if (!platform_device_add_data(tpm_device,
 794                                               &i2c_tpm_data,
 795                                               sizeof(i2c_tpm_data))) {
 796                         if (platform_device_add(tpm_device)) {
 797                                 errstr = "register TPM i2c bus";
 798                                 goto error_free_tpm;
 799                         }
 800                 } else {
 801                         errstr = "allocate TPM i2c bus data";
 802                         goto error_free_tpm;
 803                 }
 804         } else {
 805                 errstr = "allocate TPM i2c device";
 806                 goto error_tpm;
 807         }
 808
 809         return;
 810
 811 error_free_tpm:
 812         kfree(tpm_device);
 813 error_tpm:
 814         pr_err("viper: Couldn't %s, giving up\n", errstr);
 815 }
 816
 817 static void __init viper_init_vcore_gpios(void)
 818 {
 819         if (gpio_request(VIPER_PSU_DATA_GPIO, "PSU data"))
 820                 goto err_request_data;
 821
 822         if (gpio_request(VIPER_PSU_CLK_GPIO, "PSU clock"))
 823                 goto err_request_clk;
 824
 825         if (gpio_request(VIPER_PSU_nCS_LD_GPIO, "PSU cs"))
 826                 goto err_request_cs;
 827
 828         if (gpio_direction_output(VIPER_PSU_DATA_GPIO, 0) ||
 829             gpio_direction_output(VIPER_PSU_CLK_GPIO, 0) ||
 830             gpio_direction_output(VIPER_PSU_nCS_LD_GPIO, 0))
 831                 goto err_dir;
 832
 833         /* c/should assume redboot set the correct level ??? */
 834         viper_set_core_cpu_voltage(get_clk_frequency_khz(0), 1);
 835
 836         return;
 837
 838 err_dir:
 839         gpio_free(VIPER_PSU_nCS_LD_GPIO);
 840 err_request_cs:
 841         gpio_free(VIPER_PSU_CLK_GPIO);
 842 err_request_clk:
 843         gpio_free(VIPER_PSU_DATA_GPIO);
 844 err_request_data:
 845         pr_err("viper: Failed to setup vcore control GPIOs\n");
 846 }
 847
 848 static void __init viper_init_serial_gpio(void)
 849 {
 850         if (gpio_request(VIPER_UART_SHDN_GPIO, "UARTs shutdown"))
 851                 goto err_request;
 852
 853         if (gpio_direction_output(VIPER_UART_SHDN_GPIO, 0))
 854                 goto err_dir;
 855
 856         return;
 857
 858 err_dir:
 859         gpio_free(VIPER_UART_SHDN_GPIO);
 860 err_request:
 861         pr_err("viper: Failed to setup UART shutdown GPIO\n");
 862 }
 863
 864 #ifdef CONFIG_CPU_FREQ
 865 static int viper_cpufreq_notifier(struct notifier_block *nb,
 866                                   unsigned long val, void *data)
 867 {
 868         struct cpufreq_freqs *freq = data;
 869
 870         /* TODO: Adjust timings??? */
 871
 872         switch (val) {
 873         case CPUFREQ_PRECHANGE:
 874                 if (freq->old < freq->new) {
 875                         /* we are getting faster so raise the voltage
 876                          * before we change freq */
 877                         viper_set_core_cpu_voltage(freq->new, 0);
 878                 }
 879                 break;
 880         case CPUFREQ_POSTCHANGE:
 881                 if (freq->old > freq->new) {
 882                         /* we are slowing down so drop the power
 883                          * after we change freq */
 884                         viper_set_core_cpu_voltage(freq->new, 0);
 885                 }
 886                 break;
 887         case CPUFREQ_RESUMECHANGE:
 888                 viper_set_core_cpu_voltage(freq->new, 0);
 889                 break;
 890         default:
 891                 /* ignore */
 892                 break;
 893         }
 894
 895         return 0;
 896 }
 897
 898 static struct notifier_block viper_cpufreq_notifier_block = {
 899         .notifier_call  = viper_cpufreq_notifier
 900 };
 901
 902 static void __init viper_init_cpufreq(void)
 903 {
 904         if (cpufreq_register_notifier(&viper_cpufreq_notifier_block,
 905                                       CPUFREQ_TRANSITION_NOTIFIER))
 906                 pr_err("viper: Failed to setup cpufreq notifier\n");
 907 }
 908 #else
 909 static inline void viper_init_cpufreq(void) {}
 910 #endif
 911
 912 static void viper_power_off(void)
 913 {
 914         pr_notice("Shutting off UPS\n");
 915         gpio_set_value(VIPER_UPS_GPIO, 1);
 916         /* Spin to death... */
 917         while (1);
 918 }
 919
 920 static void __init viper_init(void)
 921 {
 922         u8 version;
 923
 924         pm_power_off = viper_power_off;
 925
 926         pxa2xx_mfp_config(ARRAY_AND_SIZE(viper_pin_config));
 927
 928         pxa_set_ffuart_info(NULL);
 929         pxa_set_btuart_info(NULL);
 930         pxa_set_stuart_info(NULL);
 931
 932         /* Wake-up serial console */
 933         viper_init_serial_gpio();
 934
 935         set_pxa_fb_info(&fb_info);
 936
 937         /* v1 hardware cannot use the datacs line */
 938         version = viper_hw_version();
 939         if (version == 0)
 940                 smc91x_device.num_resources--;
 941
 942         pxa_set_i2c_info(NULL);
 943         platform_add_devices(viper_devs, ARRAY_SIZE(viper_devs));
 944
 945         viper_init_vcore_gpios();
 946         viper_init_cpufreq();
 947
 948         sysdev_driver_register(&cpu_sysdev_class, &viper_cpu_sysdev_driver);
 949
 950         if (version) {
 951                 pr_info("viper: hardware v%di%d detected. "
 952                         "CPLD revision %d.\n",
 953                         VIPER_BOARD_VERSION(version),
 954                         VIPER_BOARD_ISSUE(version),
 955                         VIPER_CPLD_REVISION(version));
 956                 system_rev = (VIPER_BOARD_VERSION(version) << 8) |
 957                              (VIPER_BOARD_ISSUE(version) << 4) |
 958                              VIPER_CPLD_REVISION(version);
 959         } else {
 960                 pr_info("viper: No version register.\n");
 961         }
 962
 963         i2c_register_board_info(1, ARRAY_AND_SIZE(viper_i2c_devices));
 964
 965         viper_tpm_init();
 966         pxa_set_ac97_info(NULL);
 967 }
 968
 969 static struct map_desc viper_io_desc[] __initdata = {
 970         {
 971                 .virtual = VIPER_CPLD_BASE,
 972                 .pfn     = __phys_to_pfn(VIPER_CPLD_PHYS),
 973                 .length  = 0x00300000,
 974                 .type    = MT_DEVICE,
 975         },
 976         {
 977                 .virtual = VIPER_PC104IO_BASE,
 978                 .pfn     = __phys_to_pfn(0x30000000),
 979                 .length  = 0x00800000,
 980                 .type    = MT_DEVICE,
 981         },
 982 };
 983
 984 static void __init viper_map_io(void)
 985 {
 986         pxa25x_map_io();
 987
 988         iotable_init(viper_io_desc, ARRAY_SIZE(viper_io_desc));
 989
 990         PCFR |= PCFR_OPDE;
 991 }
 992
 993 MACHINE_START(VIPER, "Arcom/Eurotech VIPER SBC")
 994         /* Maintainer: Marc Zyngier <maz@misterjones.org> */
 995         .boot_params    = 0xa0000100,
 996         .map_io         = viper_map_io,
 997         .init_irq       = viper_init_irq,
 998         .timer          = &pxa_timer,
 999         .init_machine   = viper_init,
1000 MACHINE_END