arch/arm/mach-pxa/viper.c

   1 /*
   2  *  linux/arch/arm/mach-pxa/viper.c
   3  *
   4  *  Support for the Arcom VIPER SBC.
   5  *
   6  *  Author:     Ian Campbell
   7  *  Created:    Feb 03, 2003
   8  *  Copyright:  Arcom Control Systems
   9  *
  10  *  Maintained by Marc Zyngier <maz@misterjones.org>
  11  *                             <marc.zyngier@altran.com>
  12  *
  13  * Based on lubbock.c:
  14  *  Author:     Nicolas Pitre
  15  *  Created:    Jun 15, 2001
  16  *  Copyright:  MontaVista Software Inc.
  17  *
  18  *  This program is free software; you can redistribute it and/or modify
  19  *  it under the terms of the GNU General Public License version 2 as
  20  *  published by the Free Software Foundation.
  21  */
  22
  23 #include <linux/types.h>
  24 #include <linux/memory.h>
  25 #include <linux/cpu.h>
  26 #include <linux/cpufreq.h>
  27 #include <linux/delay.h>
  28 #include <linux/fs.h>
  29 #include <linux/init.h>
  30 #include <linux/interrupt.h>
  31 #include <linux/major.h>
  32 #include <linux/module.h>
  33 #include <linux/pm.h>
  34 #include <linux/sched.h>
  35 #include <linux/gpio.h>
  36 #include <linux/i2c-gpio.h>
  37 #include <linux/serial_8250.h>
  38 #include <linux/smc91x.h>
  39 #include <linux/pwm_backlight.h>
  40 #include <linux/usb/isp116x.h>
  41 #include <linux/mtd/mtd.h>
  42 #include <linux/mtd/partitions.h>
  43 #include <linux/mtd/physmap.h>
  44
  45 #include <mach/pxa25x.h>
  46 #include <mach/audio.h>
  47 #include <mach/pxafb.h>
  48 #include <plat/i2c.h>
  49 #include <mach/regs-uart.h>
  50 #include <mach/arcom-pcmcia.h>
  51 #include <mach/viper.h>
  52
  53 #include <asm/setup.h>
  54 #include <asm/mach-types.h>
  55 #include <asm/irq.h>
  56 #include <asm/sizes.h>
  57
  58 #include <asm/mach/arch.h>
  59 #include <asm/mach/map.h>
  60 #include <asm/mach/irq.h>
  61
  62 #include "generic.h"
  63 #include "devices.h"
  64
  65 static unsigned int icr;
  66
  67 static void viper_icr_set_bit(unsigned int bit)
  68 {
  69         icr |= bit;
  70         VIPER_ICR = icr;
  71 }
  72
  73 static void viper_icr_clear_bit(unsigned int bit)
  74 {
  75         icr &= ~bit;
  76         VIPER_ICR = icr;
  77 }
  78
  79 /* This function is used from the pcmcia module to reset the CF */
  80 static void viper_cf_reset(int state)
  81 {
  82         if (state)
  83                 viper_icr_set_bit(VIPER_ICR_CF_RST);
  84         else
  85                 viper_icr_clear_bit(VIPER_ICR_CF_RST);
  86 }
  87
  88 static struct arcom_pcmcia_pdata viper_pcmcia_info = {
  89         .cd_gpio        = VIPER_CF_CD_GPIO,
  90         .rdy_gpio       = VIPER_CF_RDY_GPIO,
  91         .pwr_gpio       = VIPER_CF_POWER_GPIO,
  92         .reset          = viper_cf_reset,
  93 };
  94
  95 static struct platform_device viper_pcmcia_device = {
  96         .name           = "viper-pcmcia",
  97         .id             = -1,
  98         .dev            = {
  99                 .platform_data  = &viper_pcmcia_info,
 100         },
 101 };
 102
 103 /*
 104  * The CPLD version register was not present on VIPER boards prior to
 105  * v2i1. On v1 boards where the version register is not present we
 106  * will just read back the previous value from the databus.
 107  *
 108  * Therefore we do two reads. The first time we write 0 to the
 109  * (read-only) register before reading and the second time we write
 110  * 0xff first. If the two reads do not match or they read back as 0xff
 111  * or 0x00 then we have version 1 hardware.
 112  */
 113 static u8 viper_hw_version(void)
 114 {
 115         u8 v1, v2;
 116         unsigned long flags;
 117
 118         local_irq_save(flags);
 119
 120         VIPER_VERSION = 0;
 121         v1 = VIPER_VERSION;
 122         VIPER_VERSION = 0xff;
 123         v2 = VIPER_VERSION;
 124
 125         v1 = (v1 != v2 || v1 == 0xff) ? 0 : v1;
 126
 127         local_irq_restore(flags);
 128         return v1;
 129 }
 130
 131 /* CPU sysdev */
 132 static int viper_cpu_suspend(struct sys_device *sysdev, pm_message_t state)
 133 {
 134         viper_icr_set_bit(VIPER_ICR_R_DIS);
 135         return 0;
 136 }
 137
 138 static int viper_cpu_resume(struct sys_device *sysdev)
 139 {
 140         viper_icr_clear_bit(VIPER_ICR_R_DIS);
 141         return 0;
 142 }
 143
 144 static struct sysdev_driver viper_cpu_sysdev_driver = {
 145         .suspend        = viper_cpu_suspend,
 146         .resume         = viper_cpu_resume,
 147 };
 148
 149 static unsigned int current_voltage_divisor;
 150
 151 /*
 152  * If force is not true then step from existing to new divisor. If
 153  * force is true then jump straight to the new divisor. Stepping is
 154  * used because if the jump in voltage is too large, the VCC can dip
 155  * too low and the regulator cuts out.
 156  *
 157  * force can be used to initialize the divisor to a know state by
 158  * setting the value for the current clock speed, since we are already
 159  * running at that speed we know the voltage should be pretty close so
 160  * the jump won't be too large
 161  */
 162 static void viper_set_core_cpu_voltage(unsigned long khz, int force)
 163 {
 164         int i = 0;
 165         unsigned int divisor = 0;
 166         const char *v;
 167
 168         if (khz < 200000) {
 169                 v = "1.0"; divisor = 0xfff;
 170         } else if (khz < 300000) {
 171                 v = "1.1"; divisor = 0xde5;
 172         } else {
 173                 v = "1.3"; divisor = 0x325;
 174         }
 175
 176         pr_debug("viper: setting CPU core voltage to %sV at %d.%03dMHz\n",
 177                  v, (int)khz / 1000, (int)khz % 1000);
 178
 179 #define STEP 0x100
 180         do {
 181                 int step;
 182
 183                 if (force)
 184                         step = divisor;
 185                 else if (current_voltage_divisor < divisor - STEP)
 186                         step = current_voltage_divisor + STEP;
 187                 else if (current_voltage_divisor > divisor + STEP)
 188                         step = current_voltage_divisor - STEP;
 189                 else
 190                         step = divisor;
 191                 force = 0;
 192
 193                 gpio_set_value(VIPER_PSU_CLK_GPIO, 0);
 194                 gpio_set_value(VIPER_PSU_nCS_LD_GPIO, 0);
 195
 196                 for (i = 1 << 11 ; i > 0 ; i >>= 1) {
 197                         udelay(1);
 198
 199                         gpio_set_value(VIPER_PSU_DATA_GPIO, step & i);
 200                         udelay(1);
 201
 202                         gpio_set_value(VIPER_PSU_CLK_GPIO, 1);
 203                         udelay(1);
 204
 205                         gpio_set_value(VIPER_PSU_CLK_GPIO, 0);
 206                 }
 207                 udelay(1);
 208
 209                 gpio_set_value(VIPER_PSU_nCS_LD_GPIO, 1);
 210                 udelay(1);
 211
 212                 gpio_set_value(VIPER_PSU_nCS_LD_GPIO, 0);
 213
 214                 current_voltage_divisor = step;
 215         } while (current_voltage_divisor != divisor);
 216 }
 217
 218 /* Interrupt handling */
 219 static unsigned long viper_irq_enabled_mask;
 220 static const int viper_isa_irqs[] = { 3, 4, 5, 6, 7, 10, 11, 12, 9, 14, 15 };
 221 static const int viper_isa_irq_map[] = {
 222         0,              /* ISA irq #0, invalid */
 223         0,              /* ISA irq #1, invalid */
 224         0,              /* ISA irq #2, invalid */
 225         1 << 0,         /* ISA irq #3 */
 226         1 << 1,         /* ISA irq #4 */
 227         1 << 2,         /* ISA irq #5 */
 228         1 << 3,         /* ISA irq #6 */
 229         1 << 4,         /* ISA irq #7 */
 230         0,              /* ISA irq #8, invalid */
 231         1 << 8,         /* ISA irq #9 */
 232         1 << 5,         /* ISA irq #10 */
 233         1 << 6,         /* ISA irq #11 */
 234         1 << 7,         /* ISA irq #12 */
 235         0,              /* ISA irq #13, invalid */
 236         1 << 9,         /* ISA irq #14 */
 237         1 << 10,        /* ISA irq #15 */
 238 };
 239
 240 static inline int viper_irq_to_bitmask(unsigned int irq)
 241 {
 242         return viper_isa_irq_map[irq - PXA_ISA_IRQ(0)];
 243 }
 244
 245 static inline int viper_bit_to_irq(int bit)
 246 {
 247         return viper_isa_irqs[bit] + PXA_ISA_IRQ(0);
 248 }
 249
 250 static void viper_ack_irq(unsigned int irq)
 251 {
 252         int viper_irq = viper_irq_to_bitmask(irq);
 253
 254         if (viper_irq & 0xff)
 255                 VIPER_LO_IRQ_STATUS = viper_irq;
 256         else
 257                 VIPER_HI_IRQ_STATUS = (viper_irq >> 8);
 258 }
 259
 260 static void viper_mask_irq(unsigned int irq)
 261 {
 262         viper_irq_enabled_mask &= ~(viper_irq_to_bitmask(irq));
 263 }
 264
 265 static void viper_unmask_irq(unsigned int irq)
 266 {
 267         viper_irq_enabled_mask |= viper_irq_to_bitmask(irq);
 268 }
 269
 270 static inline unsigned long viper_irq_pending(void)
 271 {
 272         return (VIPER_HI_IRQ_STATUS << 8 | VIPER_LO_IRQ_STATUS) &
 273                         viper_irq_enabled_mask;
 274 }
 275
 276 static void viper_irq_handler(unsigned int irq, struct irq_desc *desc)
 277 {
 278         unsigned long pending;
 279
 280         pending = viper_irq_pending();
 281         do {
 282                 /* we're in a chained irq handler,
 283                  * so ack the interrupt by hand */
 284                 GEDR(VIPER_CPLD_GPIO) = GPIO_bit(VIPER_CPLD_GPIO);
 285
 286                 if (likely(pending)) {
 287                         irq = viper_bit_to_irq(__ffs(pending));
 288                         generic_handle_irq(irq);
 289                 }
 290                 pending = viper_irq_pending();
 291         } while (pending);
 292 }
 293
 294 static struct irq_chip viper_irq_chip = {
 295         .name   = "ISA",
 296         .ack    = viper_ack_irq,
 297         .mask   = viper_mask_irq,
 298         .unmask = viper_unmask_irq
 299 };
 300
 301 static void __init viper_init_irq(void)
 302 {
 303         int level;
 304         int isa_irq;
 305
 306         pxa25x_init_irq();
 307
 308         /* setup ISA IRQs */
 309         for (level = 0; level < ARRAY_SIZE(viper_isa_irqs); level++) {
 310                 isa_irq = viper_bit_to_irq(level);
 311                 set_irq_chip(isa_irq, &viper_irq_chip);
 312                 set_irq_handler(isa_irq, handle_edge_irq);
 313                 set_irq_flags(isa_irq, IRQF_VALID | IRQF_PROBE);
 314         }
 315
 316         set_irq_chained_handler(gpio_to_irq(VIPER_CPLD_GPIO),
 317                                 viper_irq_handler);
 318         set_irq_type(gpio_to_irq(VIPER_CPLD_GPIO), IRQ_TYPE_EDGE_BOTH);
 319 }
 320
 321 /* Flat Panel */
 322 static struct pxafb_mode_info fb_mode_info[] = {
 323         {
 324                 .pixclock       = 157500,
 325
 326                 .xres           = 320,
 327                 .yres           = 240,
 328
 329                 .bpp            = 16,
 330
 331                 .hsync_len      = 63,
 332                 .left_margin    = 7,
 333                 .right_margin   = 13,
 334
 335                 .vsync_len      = 20,
 336                 .upper_margin   = 0,
 337                 .lower_margin   = 0,
 338
 339                 .sync           = 0,
 340         },
 341 };
 342
 343 static struct pxafb_mach_info fb_info = {
 344         .modes                  = fb_mode_info,
 345         .num_modes              = 1,
 346         .lcd_conn               = LCD_COLOR_TFT_16BPP | LCD_PCLK_EDGE_FALL,
 347 };
 348
 349 static int viper_backlight_init(struct device *dev)
 350 {
 351         int ret;
 352
 353         /* GPIO9 and 10 control FB backlight. Initialise to off */
 354         ret = gpio_request(VIPER_BCKLIGHT_EN_GPIO, "Backlight");
 355         if (ret)
 356                 goto err_request_bckl;
 357
 358         ret = gpio_request(VIPER_LCD_EN_GPIO, "LCD");
 359         if (ret)
 360                 goto err_request_lcd;
 361
 362         ret = gpio_direction_output(VIPER_BCKLIGHT_EN_GPIO, 0);
 363         if (ret)
 364                 goto err_dir;
 365
 366         ret = gpio_direction_output(VIPER_LCD_EN_GPIO, 0);
 367         if (ret)
 368                 goto err_dir;
 369
 370         return 0;
 371
 372 err_dir:
 373         gpio_free(VIPER_LCD_EN_GPIO);
 374 err_request_lcd:
 375         gpio_free(VIPER_BCKLIGHT_EN_GPIO);
 376 err_request_bckl:
 377         dev_err(dev, "Failed to setup LCD GPIOs\n");
 378
 379         return ret;
 380 }
 381
 382 static int viper_backlight_notify(int brightness)
 383 {
 384         gpio_set_value(VIPER_LCD_EN_GPIO, !!brightness);
 385         gpio_set_value(VIPER_BCKLIGHT_EN_GPIO, !!brightness);
 386
 387         return brightness;
 388 }
 389
 390 static void viper_backlight_exit(struct device *dev)
 391 {
 392         gpio_free(VIPER_LCD_EN_GPIO);
 393         gpio_free(VIPER_BCKLIGHT_EN_GPIO);
 394 }
 395
 396 static struct platform_pwm_backlight_data viper_backlight_data = {
 397         .pwm_id         = 0,
 398         .max_brightness = 100,
 399         .dft_brightness = 100,
 400         .pwm_period_ns  = 1000000,
 401         .init           = viper_backlight_init,
 402         .notify         = viper_backlight_notify,
 403         .exit           = viper_backlight_exit,
 404 };
 405
 406 static struct platform_device viper_backlight_device = {
 407         .name           = "pwm-backlight",
 408         .dev            = {
 409                 .parent         = &pxa25x_device_pwm0.dev,
 410                 .platform_data  = &viper_backlight_data,
 411         },
 412 };
 413
 414 /* Ethernet */
 415 static struct resource smc91x_resources[] = {
 416         [0] = {
 417                 .name   = "smc91x-regs",
 418                 .start  = VIPER_ETH_PHYS + 0x300,
 419                 .end    = VIPER_ETH_PHYS + 0x30f,
 420                 .flags  = IORESOURCE_MEM,
 421         },
 422         [1] = {
 423                 .start  = gpio_to_irq(VIPER_ETH_GPIO),
 424                 .end    = gpio_to_irq(VIPER_ETH_GPIO),
 425                 .flags  = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
 426         },
 427         [2] = {
 428                 .name   = "smc91x-data32",
 429                 .start  = VIPER_ETH_DATA_PHYS,
 430                 .end    = VIPER_ETH_DATA_PHYS + 3,
 431                 .flags  = IORESOURCE_MEM,
 432         },
 433 };
 434
 435 static struct smc91x_platdata viper_smc91x_info = {
 436         .flags  = SMC91X_USE_16BIT | SMC91X_NOWAIT,
 437         .leda   = RPC_LED_100_10,
 438         .ledb   = RPC_LED_TX_RX,
 439 };
 440
 441 static struct platform_device smc91x_device = {
 442         .name           = "smc91x",
 443         .id             = -1,
 444         .num_resources  = ARRAY_SIZE(smc91x_resources),
 445         .resource       = smc91x_resources,
 446         .dev            = {
 447                 .platform_data  = &viper_smc91x_info,
 448         },
 449 };
 450
 451 /* i2c */
 452 static struct i2c_gpio_platform_data i2c_bus_data = {
 453         .sda_pin = VIPER_RTC_I2C_SDA_GPIO,
 454         .scl_pin = VIPER_RTC_I2C_SCL_GPIO,
 455         .udelay  = 10,
 456         .timeout = 100,
 457 };
 458
 459 static struct platform_device i2c_bus_device = {
 460         .name           = "i2c-gpio",
 461         .id             = 1, /* pxa2xx-i2c is bus 0, so start at 1 */
 462         .dev = {
 463                 .platform_data = &i2c_bus_data,
 464         }
 465 };
 466
 467 static struct i2c_board_info __initdata viper_i2c_devices[] = {
 468         {
 469                 I2C_BOARD_INFO("ds1338", 0x68),
 470         },
 471 };
 472
 473 /*
 474  * Serial configuration:
 475  * You can either have the standard PXA ports driven by the PXA driver,
 476  * or all the ports (PXA + 16850) driven by the 8250 driver.
 477  * Choose your poison.
 478  */
 479
 480 static struct resource viper_serial_resources[] = {
 481 #ifndef CONFIG_SERIAL_PXA
 482         {
 483                 .start  = 0x40100000,
 484                 .end    = 0x4010001f,
 485                 .flags  = IORESOURCE_MEM,
 486         },
 487         {
 488                 .start  = 0x40200000,
 489                 .end    = 0x4020001f,
 490                 .flags  = IORESOURCE_MEM,
 491         },
 492         {
 493                 .start  = 0x40700000,
 494                 .end    = 0x4070001f,
 495                 .flags  = IORESOURCE_MEM,
 496         },
 497         {
 498                 .start  = VIPER_UARTA_PHYS,
 499                 .end    = VIPER_UARTA_PHYS + 0xf,
 500                 .flags  = IORESOURCE_MEM,
 501         },
 502         {
 503                 .start  = VIPER_UARTB_PHYS,
 504                 .end    = VIPER_UARTB_PHYS + 0xf,
 505                 .flags  = IORESOURCE_MEM,
 506         },
 507 #else
 508         {
 509                 0,
 510         },
 511 #endif
 512 };
 513
 514 static struct plat_serial8250_port serial_platform_data[] = {
 515 #ifndef CONFIG_SERIAL_PXA
 516         /* Internal UARTs */
 517         {
 518                 .membase        = (void *)&FFUART,
 519                 .mapbase        = __PREG(FFUART),
 520                 .irq            = IRQ_FFUART,
 521                 .uartclk        = 921600 * 16,
 522                 .regshift       = 2,
 523                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
 524                 .iotype         = UPIO_MEM,
 525         },
 526         {
 527                 .membase        = (void *)&BTUART,
 528                 .mapbase        = __PREG(BTUART),
 529                 .irq            = IRQ_BTUART,
 530                 .uartclk        = 921600 * 16,
 531                 .regshift       = 2,
 532                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
 533                 .iotype         = UPIO_MEM,
 534         },
 535         {
 536                 .membase        = (void *)&STUART,
 537                 .mapbase        = __PREG(STUART),
 538                 .irq            = IRQ_STUART,
 539                 .uartclk        = 921600 * 16,
 540                 .regshift       = 2,
 541                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
 542                 .iotype         = UPIO_MEM,
 543         },
 544         /* External UARTs */
 545         {
 546                 .mapbase        = VIPER_UARTA_PHYS,
 547                 .irq            = gpio_to_irq(VIPER_UARTA_GPIO),
 548                 .irqflags       = IRQF_TRIGGER_RISING,
 549                 .uartclk        = 1843200,
 550                 .regshift       = 1,
 551                 .iotype         = UPIO_MEM,
 552                 .flags          = UPF_BOOT_AUTOCONF | UPF_IOREMAP |
 553                                   UPF_SKIP_TEST,
 554         },
 555         {
 556                 .mapbase        = VIPER_UARTB_PHYS,
 557                 .irq            = gpio_to_irq(VIPER_UARTB_GPIO),
 558                 .irqflags       = IRQF_TRIGGER_RISING,
 559                 .uartclk        = 1843200,
 560                 .regshift       = 1,
 561                 .iotype         = UPIO_MEM,
 562                 .flags          = UPF_BOOT_AUTOCONF | UPF_IOREMAP |
 563                                   UPF_SKIP_TEST,
 564         },
 565 #endif
 566         { },
 567 };
 568
 569 static struct platform_device serial_device = {
 570         .name                   = "serial8250",
 571         .id                     = 0,
 572         .dev                    = {
 573                 .platform_data  = serial_platform_data,
 574         },
 575         .num_resources          = ARRAY_SIZE(viper_serial_resources),
 576         .resource               = viper_serial_resources,
 577 };
 578
 579 /* USB */
 580 static void isp116x_delay(struct device *dev, int delay)
 581 {
 582         ndelay(delay);
 583 }
 584
 585 static struct resource isp116x_resources[] = {
 586         [0] = { /* DATA */
 587                 .start  = VIPER_USB_PHYS + 0,
 588                 .end    = VIPER_USB_PHYS + 1,
 589                 .flags  = IORESOURCE_MEM,
 590         },
 591         [1] = { /* ADDR */
 592                 .start  = VIPER_USB_PHYS + 2,
 593                 .end    = VIPER_USB_PHYS + 3,
 594                 .flags  = IORESOURCE_MEM,
 595         },
 596         [2] = {
 597                 .start  = gpio_to_irq(VIPER_USB_GPIO),
 598                 .end    = gpio_to_irq(VIPER_USB_GPIO),
 599                 .flags  = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
 600         },
 601 };
 602
 603 /* (DataBusWidth16|AnalogOCEnable|DREQOutputPolarity|DownstreamPort15KRSel ) */
 604 static struct isp116x_platform_data isp116x_platform_data = {
 605         /* Enable internal resistors on downstream ports */
 606         .sel15Kres              = 1,
 607         /* On-chip overcurrent protection */
 608         .oc_enable              = 1,
 609         /* INT output polarity */
 610         .int_act_high           = 1,
 611         /* INT edge or level triggered */
 612         .int_edge_triggered     = 0,
 613
 614         /* WAKEUP pin connected - NOT SUPPORTED  */
 615         /* .remote_wakeup_connected = 0, */
 616         /* Wakeup by devices on usb bus enabled */
 617         .remote_wakeup_enable   = 0,
 618         .delay                  = isp116x_delay,
 619 };
 620
 621 static struct platform_device isp116x_device = {
 622         .name                   = "isp116x-hcd",
 623         .id                     = -1,
 624         .num_resources          = ARRAY_SIZE(isp116x_resources),
 625         .resource               = isp116x_resources,
 626         .dev                    = {
 627                 .platform_data  = &isp116x_platform_data,
 628         },
 629
 630 };
 631
 632 /* MTD */
 633 static struct resource mtd_resources[] = {
 634         [0] = { /* RedBoot config + filesystem flash */
 635                 .start  = VIPER_FLASH_PHYS,
 636                 .end    = VIPER_FLASH_PHYS + SZ_32M - 1,
 637                 .flags  = IORESOURCE_MEM,
 638         },
 639         [1] = { /* Boot flash */
 640                 .start  = VIPER_BOOT_PHYS,
 641                 .end    = VIPER_BOOT_PHYS + SZ_1M - 1,
 642                 .flags  = IORESOURCE_MEM,
 643         },
 644         [2] = { /*
 645                  * SRAM size is actually 256KB, 8bits, with a sparse mapping
 646                  * (each byte is on a 16bit boundary).
 647                  */
 648                 .start  = _VIPER_SRAM_BASE,
 649                 .end    = _VIPER_SRAM_BASE + SZ_512K - 1,
 650                 .flags  = IORESOURCE_MEM,
 651         },
 652 };
 653
 654 static struct mtd_partition viper_boot_flash_partition = {
 655         .name           = "RedBoot",
 656         .size           = SZ_1M,
 657         .offset         = 0,
 658         .mask_flags     = MTD_WRITEABLE,        /* force R/O */
 659 };
 660
 661 static struct physmap_flash_data viper_flash_data[] = {
 662         [0] = {
 663                 .width          = 2,
 664                 .parts          = NULL,
 665                 .nr_parts       = 0,
 666         },
 667         [1] = {
 668                 .width          = 2,
 669                 .parts          = &viper_boot_flash_partition,
 670                 .nr_parts       = 1,
 671         },
 672 };
 673
 674 static struct platform_device viper_mtd_devices[] = {
 675         [0] = {
 676                 .name           = "physmap-flash",
 677                 .id             = 0,
 678                 .dev            = {
 679                         .platform_data  = &viper_flash_data[0],
 680                 },
 681                 .resource       = &mtd_resources[0],
 682                 .num_resources  = 1,
 683         },
 684         [1] = {
 685                 .name           = "physmap-flash",
 686                 .id             = 1,
 687                 .dev            = {
 688                         .platform_data  = &viper_flash_data[1],
 689                 },
 690                 .resource       = &mtd_resources[1],
 691                 .num_resources  = 1,
 692         },
 693 };
 694
 695 static struct platform_device *viper_devs[] __initdata = {
 696         &smc91x_device,
 697         &i2c_bus_device,
 698         &serial_device,
 699         &isp116x_device,
 700         &viper_mtd_devices[0],
 701         &viper_mtd_devices[1],
 702         &viper_backlight_device,
 703         &viper_pcmcia_device,
 704 };
 705
 706 static mfp_cfg_t viper_pin_config[] __initdata = {
 707         /* Chip selects */
 708         GPIO15_nCS_1,
 709         GPIO78_nCS_2,
 710         GPIO79_nCS_3,
 711         GPIO80_nCS_4,
 712         GPIO33_nCS_5,
 713
 714         /* FP Backlight */
 715         GPIO9_GPIO,                             /* VIPER_BCKLIGHT_EN_GPIO */
 716         GPIO10_GPIO,                            /* VIPER_LCD_EN_GPIO */
 717         GPIO16_PWM0_OUT,
 718
 719         /* Ethernet PHY Ready */
 720         GPIO18_RDY,
 721
 722         /* Serial shutdown */
 723         GPIO12_GPIO | MFP_LPM_DRIVE_HIGH,       /* VIPER_UART_SHDN_GPIO */
 724
 725         /* Compact-Flash / PC104 */
 726         GPIO48_nPOE,
 727         GPIO49_nPWE,
 728         GPIO50_nPIOR,
 729         GPIO51_nPIOW,
 730         GPIO52_nPCE_1,
 731         GPIO53_nPCE_2,
 732         GPIO54_nPSKTSEL,
 733         GPIO55_nPREG,
 734         GPIO56_nPWAIT,
 735         GPIO57_nIOIS16,
 736         GPIO8_GPIO,                             /* VIPER_CF_RDY_GPIO */
 737         GPIO32_GPIO,                            /* VIPER_CF_CD_GPIO */
 738         GPIO82_GPIO,                            /* VIPER_CF_POWER_GPIO */
 739
 740         /* Integrated UPS control */
 741         GPIO20_GPIO,                            /* VIPER_UPS_GPIO */
 742
 743         /* Vcc regulator control */
 744         GPIO6_GPIO,                             /* VIPER_PSU_DATA_GPIO */
 745         GPIO11_GPIO,                            /* VIPER_PSU_CLK_GPIO */
 746         GPIO19_GPIO,                            /* VIPER_PSU_nCS_LD_GPIO */
 747
 748         /* i2c busses */
 749         GPIO26_GPIO,                            /* VIPER_TPM_I2C_SDA_GPIO */
 750         GPIO27_GPIO,                            /* VIPER_TPM_I2C_SCL_GPIO */
 751         GPIO83_GPIO,                            /* VIPER_RTC_I2C_SDA_GPIO */
 752         GPIO84_GPIO,                            /* VIPER_RTC_I2C_SCL_GPIO */
 753
 754         /* PC/104 Interrupt */
 755         GPIO1_GPIO | WAKEUP_ON_EDGE_RISE,       /* VIPER_CPLD_GPIO */
 756 };
 757
 758 static unsigned long viper_tpm;
 759
 760 static int __init viper_tpm_setup(char *str)
 761 {
 762         strict_strtoul(str, 10, &viper_tpm);
 763         return 1;
 764 }
 765
 766 __setup("tpm=", viper_tpm_setup);
 767
 768 static void __init viper_tpm_init(void)
 769 {
 770         struct platform_device *tpm_device;
 771         struct i2c_gpio_platform_data i2c_tpm_data = {
 772                 .sda_pin = VIPER_TPM_I2C_SDA_GPIO,
 773                 .scl_pin = VIPER_TPM_I2C_SCL_GPIO,
 774                 .udelay  = 10,
 775                 .timeout = 100,
 776         };
 777         char *errstr;
 778
 779         /* Allocate TPM i2c bus if requested */
 780         if (!viper_tpm)
 781                 return;
 782
 783         tpm_device = platform_device_alloc("i2c-gpio", 2);
 784         if (tpm_device) {
 785                 if (!platform_device_add_data(tpm_device,
 786                                               &i2c_tpm_data,
 787                                               sizeof(i2c_tpm_data))) {
 788                         if (platform_device_add(tpm_device)) {
 789                                 errstr = "register TPM i2c bus";
 790                                 goto error_free_tpm;
 791                         }
 792                 } else {
 793                         errstr = "allocate TPM i2c bus data";
 794                         goto error_free_tpm;
 795                 }
 796         } else {
 797                 errstr = "allocate TPM i2c device";
 798                 goto error_tpm;
 799         }
 800
 801         return;
 802
 803 error_free_tpm:
 804         kfree(tpm_device);
 805 error_tpm:
 806         pr_err("viper: Couldn't %s, giving up\n", errstr);
 807 }
 808
 809 static void __init viper_init_vcore_gpios(void)
 810 {
 811         if (gpio_request(VIPER_PSU_DATA_GPIO, "PSU data"))
 812                 goto err_request_data;
 813
 814         if (gpio_request(VIPER_PSU_CLK_GPIO, "PSU clock"))
 815                 goto err_request_clk;
 816
 817         if (gpio_request(VIPER_PSU_nCS_LD_GPIO, "PSU cs"))
 818                 goto err_request_cs;
 819
 820         if (gpio_direction_output(VIPER_PSU_DATA_GPIO, 0) ||
 821             gpio_direction_output(VIPER_PSU_CLK_GPIO, 0) ||
 822             gpio_direction_output(VIPER_PSU_nCS_LD_GPIO, 0))
 823                 goto err_dir;
 824
 825         /* c/should assume redboot set the correct level ??? */
 826         viper_set_core_cpu_voltage(get_clk_frequency_khz(0), 1);
 827
 828         return;
 829
 830 err_dir:
 831         gpio_free(VIPER_PSU_nCS_LD_GPIO);
 832 err_request_cs:
 833         gpio_free(VIPER_PSU_CLK_GPIO);
 834 err_request_clk:
 835         gpio_free(VIPER_PSU_DATA_GPIO);
 836 err_request_data:
 837         pr_err("viper: Failed to setup vcore control GPIOs\n");
 838 }
 839
 840 static void __init viper_init_serial_gpio(void)
 841 {
 842         if (gpio_request(VIPER_UART_SHDN_GPIO, "UARTs shutdown"))
 843                 goto err_request;
 844
 845         if (gpio_direction_output(VIPER_UART_SHDN_GPIO, 0))
 846                 goto err_dir;
 847
 848         return;
 849
 850 err_dir:
 851         gpio_free(VIPER_UART_SHDN_GPIO);
 852 err_request:
 853         pr_err("viper: Failed to setup UART shutdown GPIO\n");
 854 }
 855
 856 #ifdef CONFIG_CPU_FREQ
 857 static int viper_cpufreq_notifier(struct notifier_block *nb,
 858                                   unsigned long val, void *data)
 859 {
 860         struct cpufreq_freqs *freq = data;
 861
 862         /* TODO: Adjust timings??? */
 863
 864         switch (val) {
 865         case CPUFREQ_PRECHANGE:
 866                 if (freq->old < freq->new) {
 867                         /* we are getting faster so raise the voltage
 868                          * before we change freq */
 869                         viper_set_core_cpu_voltage(freq->new, 0);
 870                 }
 871                 break;
 872         case CPUFREQ_POSTCHANGE:
 873                 if (freq->old > freq->new) {
 874                         /* we are slowing down so drop the power
 875                          * after we change freq */
 876                         viper_set_core_cpu_voltage(freq->new, 0);
 877                 }
 878                 break;
 879         case CPUFREQ_RESUMECHANGE:
 880                 viper_set_core_cpu_voltage(freq->new, 0);
 881                 break;
 882         default:
 883                 /* ignore */
 884                 break;
 885         }
 886
 887         return 0;
 888 }
 889
 890 static struct notifier_block viper_cpufreq_notifier_block = {
 891         .notifier_call  = viper_cpufreq_notifier
 892 };
 893
 894 static void __init viper_init_cpufreq(void)
 895 {
 896         if (cpufreq_register_notifier(&viper_cpufreq_notifier_block,
 897                                       CPUFREQ_TRANSITION_NOTIFIER))
 898                 pr_err("viper: Failed to setup cpufreq notifier\n");
 899 }
 900 #else
 901 static inline void viper_init_cpufreq(void) {}
 902 #endif
 903
 904 static void viper_power_off(void)
 905 {
 906         pr_notice("Shutting off UPS\n");
 907         gpio_set_value(VIPER_UPS_GPIO, 1);
 908         /* Spin to death... */
 909         while (1);
 910 }
 911
 912 static void __init viper_init(void)
 913 {
 914         u8 version;
 915
 916         pm_power_off = viper_power_off;
 917
 918         pxa2xx_mfp_config(ARRAY_AND_SIZE(viper_pin_config));
 919
 920         pxa_set_ffuart_info(NULL);
 921         pxa_set_btuart_info(NULL);
 922         pxa_set_stuart_info(NULL);
 923
 924         /* Wake-up serial console */
 925         viper_init_serial_gpio();
 926
 927         set_pxa_fb_info(&fb_info);
 928
 929         /* v1 hardware cannot use the datacs line */
 930         version = viper_hw_version();
 931         if (version == 0)
 932                 smc91x_device.num_resources--;
 933
 934         pxa_set_i2c_info(NULL);
 935         platform_add_devices(viper_devs, ARRAY_SIZE(viper_devs));
 936
 937         viper_init_vcore_gpios();
 938         viper_init_cpufreq();
 939
 940         sysdev_driver_register(&cpu_sysdev_class, &viper_cpu_sysdev_driver);
 941
 942         if (version) {
 943                 pr_info("viper: hardware v%di%d detected. "
 944                         "CPLD revision %d.\n",
 945                         VIPER_BOARD_VERSION(version),
 946                         VIPER_BOARD_ISSUE(version),
 947                         VIPER_CPLD_REVISION(version));
 948                 system_rev = (VIPER_BOARD_VERSION(version) << 8) |
 949                              (VIPER_BOARD_ISSUE(version) << 4) |
 950                              VIPER_CPLD_REVISION(version);
 951         } else {
 952                 pr_info("viper: No version register.\n");
 953         }
 954
 955         i2c_register_board_info(1, ARRAY_AND_SIZE(viper_i2c_devices));
 956
 957         viper_tpm_init();
 958         pxa_set_ac97_info(NULL);
 959 }
 960
 961 static struct map_desc viper_io_desc[] __initdata = {
 962         {
 963                 .virtual = VIPER_CPLD_BASE,
 964                 .pfn     = __phys_to_pfn(VIPER_CPLD_PHYS),
 965                 .length  = 0x00300000,
 966                 .type    = MT_DEVICE,
 967         },
 968         {
 969                 .virtual = VIPER_PC104IO_BASE,
 970                 .pfn     = __phys_to_pfn(0x30000000),
 971                 .length  = 0x00800000,
 972                 .type    = MT_DEVICE,
 973         },
 974 };
 975
 976 static void __init viper_map_io(void)
 977 {
 978         pxa_map_io();
 979
 980         iotable_init(viper_io_desc, ARRAY_SIZE(viper_io_desc));
 981
 982         PCFR |= PCFR_OPDE;
 983 }
 984
 985 MACHINE_START(VIPER, "Arcom/Eurotech VIPER SBC")
 986         /* Maintainer: Marc Zyngier <maz@misterjones.org> */
 987         .phys_io        = 0x40000000,
 988         .io_pg_offst    = (io_p2v(0x40000000) >> 18) & 0xfffc,
 989         .boot_params    = 0xa0000100,
 990         .map_io         = viper_map_io,
 991         .init_irq       = viper_init_irq,
 992         .timer          = &pxa_timer,
 993         .init_machine   = viper_init,
 994 MACHINE_END