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/platform_data/i2c-gpio.h>
  39 #include <linux/gpio/machine.h>
  40 #include <linux/platform_data/i2c-pxa.h>
  41 #include <linux/serial_8250.h>
  42 #include <linux/smc91x.h>
  43 #include <linux/pwm.h>
  44 #include <linux/pwm_backlight.h>
  45 #include <linux/usb/isp116x.h>
  46 #include <linux/mtd/mtd.h>
  47 #include <linux/mtd/partitions.h>
  48 #include <linux/mtd/physmap.h>
  49 #include <linux/syscore_ops.h>
  50
  51 #include "pxa25x.h"
  52 #include <mach/audio.h>
  53 #include <linux/platform_data/video-pxafb.h>
  54 #include <mach/regs-uart.h>
  55 #include <linux/platform_data/pcmcia-pxa2xx_viper.h>
  56 #include "viper.h"
  57
  58 #include <asm/setup.h>
  59 #include <asm/mach-types.h>
  60 #include <asm/irq.h>
  61 #include <linux/sizes.h>
  62 #include <asm/system_info.h>
  63
  64 #include <asm/mach/arch.h>
  65 #include <asm/mach/map.h>
  66 #include <asm/mach/irq.h>
  67
  68 #include "generic.h"
  69 #include "devices.h"
  70
  71 static unsigned int icr;
  72
  73 static void viper_icr_set_bit(unsigned int bit)
  74 {
  75         icr |= bit;
  76         VIPER_ICR = icr;
  77 }
  78
  79 static void viper_icr_clear_bit(unsigned int bit)
  80 {
  81         icr &= ~bit;
  82         VIPER_ICR = icr;
  83 }
  84
  85 /* This function is used from the pcmcia module to reset the CF */
  86 static void viper_cf_reset(int state)
  87 {
  88         if (state)
  89                 viper_icr_set_bit(VIPER_ICR_CF_RST);
  90         else
  91                 viper_icr_clear_bit(VIPER_ICR_CF_RST);
  92 }
  93
  94 static struct arcom_pcmcia_pdata viper_pcmcia_info = {
  95         .cd_gpio        = VIPER_CF_CD_GPIO,
  96         .rdy_gpio       = VIPER_CF_RDY_GPIO,
  97         .pwr_gpio       = VIPER_CF_POWER_GPIO,
  98         .reset          = viper_cf_reset,
  99 };
 100
 101 static struct platform_device viper_pcmcia_device = {
 102         .name           = "viper-pcmcia",
 103         .id             = -1,
 104         .dev            = {
 105                 .platform_data  = &viper_pcmcia_info,
 106         },
 107 };
 108
 109 /*
 110  * The CPLD version register was not present on VIPER boards prior to
 111  * v2i1. On v1 boards where the version register is not present we
 112  * will just read back the previous value from the databus.
 113  *
 114  * Therefore we do two reads. The first time we write 0 to the
 115  * (read-only) register before reading and the second time we write
 116  * 0xff first. If the two reads do not match or they read back as 0xff
 117  * or 0x00 then we have version 1 hardware.
 118  */
 119 static u8 viper_hw_version(void)
 120 {
 121         u8 v1, v2;
 122         unsigned long flags;
 123
 124         local_irq_save(flags);
 125
 126         VIPER_VERSION = 0;
 127         v1 = VIPER_VERSION;
 128         VIPER_VERSION = 0xff;
 129         v2 = VIPER_VERSION;
 130
 131         v1 = (v1 != v2 || v1 == 0xff) ? 0 : v1;
 132
 133         local_irq_restore(flags);
 134         return v1;
 135 }
 136
 137 /* CPU system core operations. */
 138 static int viper_cpu_suspend(void)
 139 {
 140         viper_icr_set_bit(VIPER_ICR_R_DIS);
 141         return 0;
 142 }
 143
 144 static void viper_cpu_resume(void)
 145 {
 146         viper_icr_clear_bit(VIPER_ICR_R_DIS);
 147 }
 148
 149 static struct syscore_ops viper_cpu_syscore_ops = {
 150         .suspend        = viper_cpu_suspend,
 151         .resume         = viper_cpu_resume,
 152 };
 153
 154 static unsigned int current_voltage_divisor;
 155
 156 /*
 157  * If force is not true then step from existing to new divisor. If
 158  * force is true then jump straight to the new divisor. Stepping is
 159  * used because if the jump in voltage is too large, the VCC can dip
 160  * too low and the regulator cuts out.
 161  *
 162  * force can be used to initialize the divisor to a know state by
 163  * setting the value for the current clock speed, since we are already
 164  * running at that speed we know the voltage should be pretty close so
 165  * the jump won't be too large
 166  */
 167 static void viper_set_core_cpu_voltage(unsigned long khz, int force)
 168 {
 169         int i = 0;
 170         unsigned int divisor = 0;
 171         const char *v;
 172
 173         if (khz < 200000) {
 174                 v = "1.0"; divisor = 0xfff;
 175         } else if (khz < 300000) {
 176                 v = "1.1"; divisor = 0xde5;
 177         } else {
 178                 v = "1.3"; divisor = 0x325;
 179         }
 180
 181         pr_debug("viper: setting CPU core voltage to %sV at %d.%03dMHz\n",
 182                  v, (int)khz / 1000, (int)khz % 1000);
 183
 184 #define STEP 0x100
 185         do {
 186                 int step;
 187
 188                 if (force)
 189                         step = divisor;
 190                 else if (current_voltage_divisor < divisor - STEP)
 191                         step = current_voltage_divisor + STEP;
 192                 else if (current_voltage_divisor > divisor + STEP)
 193                         step = current_voltage_divisor - STEP;
 194                 else
 195                         step = divisor;
 196                 force = 0;
 197
 198                 gpio_set_value(VIPER_PSU_CLK_GPIO, 0);
 199                 gpio_set_value(VIPER_PSU_nCS_LD_GPIO, 0);
 200
 201                 for (i = 1 << 11 ; i > 0 ; i >>= 1) {
 202                         udelay(1);
 203
 204                         gpio_set_value(VIPER_PSU_DATA_GPIO, step & i);
 205                         udelay(1);
 206
 207                         gpio_set_value(VIPER_PSU_CLK_GPIO, 1);
 208                         udelay(1);
 209
 210                         gpio_set_value(VIPER_PSU_CLK_GPIO, 0);
 211                 }
 212                 udelay(1);
 213
 214                 gpio_set_value(VIPER_PSU_nCS_LD_GPIO, 1);
 215                 udelay(1);
 216
 217                 gpio_set_value(VIPER_PSU_nCS_LD_GPIO, 0);
 218
 219                 current_voltage_divisor = step;
 220         } while (current_voltage_divisor != divisor);
 221 }
 222
 223 /* Interrupt handling */
 224 static unsigned long viper_irq_enabled_mask;
 225 static const int viper_isa_irqs[] = { 3, 4, 5, 6, 7, 10, 11, 12, 9, 14, 15 };
 226 static const int viper_isa_irq_map[] = {
 227         0,              /* ISA irq #0, invalid */
 228         0,              /* ISA irq #1, invalid */
 229         0,              /* ISA irq #2, invalid */
 230         1 << 0,         /* ISA irq #3 */
 231         1 << 1,         /* ISA irq #4 */
 232         1 << 2,         /* ISA irq #5 */
 233         1 << 3,         /* ISA irq #6 */
 234         1 << 4,         /* ISA irq #7 */
 235         0,              /* ISA irq #8, invalid */
 236         1 << 8,         /* ISA irq #9 */
 237         1 << 5,         /* ISA irq #10 */
 238         1 << 6,         /* ISA irq #11 */
 239         1 << 7,         /* ISA irq #12 */
 240         0,              /* ISA irq #13, invalid */
 241         1 << 9,         /* ISA irq #14 */
 242         1 << 10,        /* ISA irq #15 */
 243 };
 244
 245 static inline int viper_irq_to_bitmask(unsigned int irq)
 246 {
 247         return viper_isa_irq_map[irq - PXA_ISA_IRQ(0)];
 248 }
 249
 250 static inline int viper_bit_to_irq(int bit)
 251 {
 252         return viper_isa_irqs[bit] + PXA_ISA_IRQ(0);
 253 }
 254
 255 static void viper_ack_irq(struct irq_data *d)
 256 {
 257         int viper_irq = viper_irq_to_bitmask(d->irq);
 258
 259         if (viper_irq & 0xff)
 260                 VIPER_LO_IRQ_STATUS = viper_irq;
 261         else
 262                 VIPER_HI_IRQ_STATUS = (viper_irq >> 8);
 263 }
 264
 265 static void viper_mask_irq(struct irq_data *d)
 266 {
 267         viper_irq_enabled_mask &= ~(viper_irq_to_bitmask(d->irq));
 268 }
 269
 270 static void viper_unmask_irq(struct irq_data *d)
 271 {
 272         viper_irq_enabled_mask |= viper_irq_to_bitmask(d->irq);
 273 }
 274
 275 static inline unsigned long viper_irq_pending(void)
 276 {
 277         return (VIPER_HI_IRQ_STATUS << 8 | VIPER_LO_IRQ_STATUS) &
 278                         viper_irq_enabled_mask;
 279 }
 280
 281 static void viper_irq_handler(struct irq_desc *desc)
 282 {
 283         unsigned int irq;
 284         unsigned long pending;
 285
 286         pending = viper_irq_pending();
 287         do {
 288                 /* we're in a chained irq handler,
 289                  * so ack the interrupt by hand */
 290                 desc->irq_data.chip->irq_ack(&desc->irq_data);
 291
 292                 if (likely(pending)) {
 293                         irq = viper_bit_to_irq(__ffs(pending));
 294                         generic_handle_irq(irq);
 295                 }
 296                 pending = viper_irq_pending();
 297         } while (pending);
 298 }
 299
 300 static struct irq_chip viper_irq_chip = {
 301         .name           = "ISA",
 302         .irq_ack        = viper_ack_irq,
 303         .irq_mask       = viper_mask_irq,
 304         .irq_unmask     = viper_unmask_irq
 305 };
 306
 307 static void __init viper_init_irq(void)
 308 {
 309         int level;
 310         int isa_irq;
 311
 312         pxa25x_init_irq();
 313
 314         /* setup ISA IRQs */
 315         for (level = 0; level < ARRAY_SIZE(viper_isa_irqs); level++) {
 316                 isa_irq = viper_bit_to_irq(level);
 317                 irq_set_chip_and_handler(isa_irq, &viper_irq_chip,
 318                                          handle_edge_irq);
 319                 irq_clear_status_flags(isa_irq, IRQ_NOREQUEST | IRQ_NOPROBE);
 320         }
 321
 322         irq_set_chained_handler(gpio_to_irq(VIPER_CPLD_GPIO),
 323                                 viper_irq_handler);
 324         irq_set_irq_type(gpio_to_irq(VIPER_CPLD_GPIO), IRQ_TYPE_EDGE_BOTH);
 325 }
 326
 327 /* Flat Panel */
 328 static struct pxafb_mode_info fb_mode_info[] = {
 329         {
 330                 .pixclock       = 157500,
 331
 332                 .xres           = 320,
 333                 .yres           = 240,
 334
 335                 .bpp            = 16,
 336
 337                 .hsync_len      = 63,
 338                 .left_margin    = 7,
 339                 .right_margin   = 13,
 340
 341                 .vsync_len      = 20,
 342                 .upper_margin   = 0,
 343                 .lower_margin   = 0,
 344
 345                 .sync           = 0,
 346         },
 347 };
 348
 349 static struct pxafb_mach_info fb_info = {
 350         .modes                  = fb_mode_info,
 351         .num_modes              = 1,
 352         .lcd_conn               = LCD_COLOR_TFT_16BPP | LCD_PCLK_EDGE_FALL,
 353 };
 354
 355 static struct pwm_lookup viper_pwm_lookup[] = {
 356         PWM_LOOKUP("pxa25x-pwm.0", 0, "pwm-backlight.0", NULL, 1000000,
 357                    PWM_POLARITY_NORMAL),
 358 };
 359
 360 static int viper_backlight_init(struct device *dev)
 361 {
 362         int ret;
 363
 364         /* GPIO9 and 10 control FB backlight. Initialise to off */
 365         ret = gpio_request(VIPER_BCKLIGHT_EN_GPIO, "Backlight");
 366         if (ret)
 367                 goto err_request_bckl;
 368
 369         ret = gpio_request(VIPER_LCD_EN_GPIO, "LCD");
 370         if (ret)
 371                 goto err_request_lcd;
 372
 373         ret = gpio_direction_output(VIPER_BCKLIGHT_EN_GPIO, 0);
 374         if (ret)
 375                 goto err_dir;
 376
 377         ret = gpio_direction_output(VIPER_LCD_EN_GPIO, 0);
 378         if (ret)
 379                 goto err_dir;
 380
 381         return 0;
 382
 383 err_dir:
 384         gpio_free(VIPER_LCD_EN_GPIO);
 385 err_request_lcd:
 386         gpio_free(VIPER_BCKLIGHT_EN_GPIO);
 387 err_request_bckl:
 388         dev_err(dev, "Failed to setup LCD GPIOs\n");
 389
 390         return ret;
 391 }
 392
 393 static int viper_backlight_notify(struct device *dev, int brightness)
 394 {
 395         gpio_set_value(VIPER_LCD_EN_GPIO, !!brightness);
 396         gpio_set_value(VIPER_BCKLIGHT_EN_GPIO, !!brightness);
 397
 398         return brightness;
 399 }
 400
 401 static void viper_backlight_exit(struct device *dev)
 402 {
 403         gpio_free(VIPER_LCD_EN_GPIO);
 404         gpio_free(VIPER_BCKLIGHT_EN_GPIO);
 405 }
 406
 407 static struct platform_pwm_backlight_data viper_backlight_data = {
 408         .max_brightness = 100,
 409         .dft_brightness = 100,
 410         .enable_gpio    = -1,
 411         .init           = viper_backlight_init,
 412         .notify         = viper_backlight_notify,
 413         .exit           = viper_backlight_exit,
 414 };
 415
 416 static struct platform_device viper_backlight_device = {
 417         .name           = "pwm-backlight",
 418         .dev            = {
 419                 .parent         = &pxa25x_device_pwm0.dev,
 420                 .platform_data  = &viper_backlight_data,
 421         },
 422 };
 423
 424 /* Ethernet */
 425 static struct resource smc91x_resources[] = {
 426         [0] = {
 427                 .name   = "smc91x-regs",
 428                 .start  = VIPER_ETH_PHYS + 0x300,
 429                 .end    = VIPER_ETH_PHYS + 0x30f,
 430                 .flags  = IORESOURCE_MEM,
 431         },
 432         [1] = {
 433                 .start  = PXA_GPIO_TO_IRQ(VIPER_ETH_GPIO),
 434                 .end    = PXA_GPIO_TO_IRQ(VIPER_ETH_GPIO),
 435                 .flags  = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
 436         },
 437         [2] = {
 438                 .name   = "smc91x-data32",
 439                 .start  = VIPER_ETH_DATA_PHYS,
 440                 .end    = VIPER_ETH_DATA_PHYS + 3,
 441                 .flags  = IORESOURCE_MEM,
 442         },
 443 };
 444
 445 static struct smc91x_platdata viper_smc91x_info = {
 446         .flags  = SMC91X_USE_16BIT | SMC91X_NOWAIT,
 447         .leda   = RPC_LED_100_10,
 448         .ledb   = RPC_LED_TX_RX,
 449 };
 450
 451 static struct platform_device smc91x_device = {
 452         .name           = "smc91x",
 453         .id             = -1,
 454         .num_resources  = ARRAY_SIZE(smc91x_resources),
 455         .resource       = smc91x_resources,
 456         .dev            = {
 457                 .platform_data  = &viper_smc91x_info,
 458         },
 459 };
 460
 461 /* i2c */
 462 static struct gpiod_lookup_table viper_i2c_gpiod_table = {
 463         .dev_id         = "i2c-gpio.1",
 464         .table          = {
 465                 GPIO_LOOKUP_IDX("gpio-pxa", VIPER_RTC_I2C_SDA_GPIO,
 466                                 NULL, 0, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
 467                 GPIO_LOOKUP_IDX("gpio-pxa", VIPER_RTC_I2C_SCL_GPIO,
 468                                 NULL, 1, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
 469         },
 470 };
 471
 472 static struct i2c_gpio_platform_data i2c_bus_data = {
 473         .udelay  = 10,
 474         .timeout = HZ,
 475 };
 476
 477 static struct platform_device i2c_bus_device = {
 478         .name           = "i2c-gpio",
 479         .id             = 1, /* pxa2xx-i2c is bus 0, so start at 1 */
 480         .dev = {
 481                 .platform_data = &i2c_bus_data,
 482         }
 483 };
 484
 485 static struct i2c_board_info __initdata viper_i2c_devices[] = {
 486         {
 487                 I2C_BOARD_INFO("ds1338", 0x68),
 488         },
 489 };
 490
 491 /*
 492  * Serial configuration:
 493  * You can either have the standard PXA ports driven by the PXA driver,
 494  * or all the ports (PXA + 16850) driven by the 8250 driver.
 495  * Choose your poison.
 496  */
 497
 498 static struct resource viper_serial_resources[] = {
 499 #ifndef CONFIG_SERIAL_PXA
 500         {
 501                 .start  = 0x40100000,
 502                 .end    = 0x4010001f,
 503                 .flags  = IORESOURCE_MEM,
 504         },
 505         {
 506                 .start  = 0x40200000,
 507                 .end    = 0x4020001f,
 508                 .flags  = IORESOURCE_MEM,
 509         },
 510         {
 511                 .start  = 0x40700000,
 512                 .end    = 0x4070001f,
 513                 .flags  = IORESOURCE_MEM,
 514         },
 515         {
 516                 .start  = VIPER_UARTA_PHYS,
 517                 .end    = VIPER_UARTA_PHYS + 0xf,
 518                 .flags  = IORESOURCE_MEM,
 519         },
 520         {
 521                 .start  = VIPER_UARTB_PHYS,
 522                 .end    = VIPER_UARTB_PHYS + 0xf,
 523                 .flags  = IORESOURCE_MEM,
 524         },
 525 #else
 526         {
 527                 0,
 528         },
 529 #endif
 530 };
 531
 532 static struct plat_serial8250_port serial_platform_data[] = {
 533 #ifndef CONFIG_SERIAL_PXA
 534         /* Internal UARTs */
 535         {
 536                 .membase        = (void *)&FFUART,
 537                 .mapbase        = __PREG(FFUART),
 538                 .irq            = IRQ_FFUART,
 539                 .uartclk        = 921600 * 16,
 540                 .regshift       = 2,
 541                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
 542                 .iotype         = UPIO_MEM,
 543         },
 544         {
 545                 .membase        = (void *)&BTUART,
 546                 .mapbase        = __PREG(BTUART),
 547                 .irq            = IRQ_BTUART,
 548                 .uartclk        = 921600 * 16,
 549                 .regshift       = 2,
 550                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
 551                 .iotype         = UPIO_MEM,
 552         },
 553         {
 554                 .membase        = (void *)&STUART,
 555                 .mapbase        = __PREG(STUART),
 556                 .irq            = IRQ_STUART,
 557                 .uartclk        = 921600 * 16,
 558                 .regshift       = 2,
 559                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
 560                 .iotype         = UPIO_MEM,
 561         },
 562         /* External UARTs */
 563         {
 564                 .mapbase        = VIPER_UARTA_PHYS,
 565                 .irq            = PXA_GPIO_TO_IRQ(VIPER_UARTA_GPIO),
 566                 .irqflags       = IRQF_TRIGGER_RISING,
 567                 .uartclk        = 1843200,
 568                 .regshift       = 1,
 569                 .iotype         = UPIO_MEM,
 570                 .flags          = UPF_BOOT_AUTOCONF | UPF_IOREMAP |
 571                                   UPF_SKIP_TEST,
 572         },
 573         {
 574                 .mapbase        = VIPER_UARTB_PHYS,
 575                 .irq            = PXA_GPIO_TO_IRQ(VIPER_UARTB_GPIO),
 576                 .irqflags       = IRQF_TRIGGER_RISING,
 577                 .uartclk        = 1843200,
 578                 .regshift       = 1,
 579                 .iotype         = UPIO_MEM,
 580                 .flags          = UPF_BOOT_AUTOCONF | UPF_IOREMAP |
 581                                   UPF_SKIP_TEST,
 582         },
 583 #endif
 584         { },
 585 };
 586
 587 static struct platform_device serial_device = {
 588         .name                   = "serial8250",
 589         .id                     = 0,
 590         .dev                    = {
 591                 .platform_data  = serial_platform_data,
 592         },
 593         .num_resources          = ARRAY_SIZE(viper_serial_resources),
 594         .resource               = viper_serial_resources,
 595 };
 596
 597 /* USB */
 598 static void isp116x_delay(struct device *dev, int delay)
 599 {
 600         ndelay(delay);
 601 }
 602
 603 static struct resource isp116x_resources[] = {
 604         [0] = { /* DATA */
 605                 .start  = VIPER_USB_PHYS + 0,
 606                 .end    = VIPER_USB_PHYS + 1,
 607                 .flags  = IORESOURCE_MEM,
 608         },
 609         [1] = { /* ADDR */
 610                 .start  = VIPER_USB_PHYS + 2,
 611                 .end    = VIPER_USB_PHYS + 3,
 612                 .flags  = IORESOURCE_MEM,
 613         },
 614         [2] = {
 615                 .start  = PXA_GPIO_TO_IRQ(VIPER_USB_GPIO),
 616                 .end    = PXA_GPIO_TO_IRQ(VIPER_USB_GPIO),
 617                 .flags  = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
 618         },
 619 };
 620
 621 /* (DataBusWidth16|AnalogOCEnable|DREQOutputPolarity|DownstreamPort15KRSel ) */
 622 static struct isp116x_platform_data isp116x_platform_data = {
 623         /* Enable internal resistors on downstream ports */
 624         .sel15Kres              = 1,
 625         /* On-chip overcurrent protection */
 626         .oc_enable              = 1,
 627         /* INT output polarity */
 628         .int_act_high           = 1,
 629         /* INT edge or level triggered */
 630         .int_edge_triggered     = 0,
 631
 632         /* WAKEUP pin connected - NOT SUPPORTED  */
 633         /* .remote_wakeup_connected = 0, */
 634         /* Wakeup by devices on usb bus enabled */
 635         .remote_wakeup_enable   = 0,
 636         .delay                  = isp116x_delay,
 637 };
 638
 639 static struct platform_device isp116x_device = {
 640         .name                   = "isp116x-hcd",
 641         .id                     = -1,
 642         .num_resources          = ARRAY_SIZE(isp116x_resources),
 643         .resource               = isp116x_resources,
 644         .dev                    = {
 645                 .platform_data  = &isp116x_platform_data,
 646         },
 647
 648 };
 649
 650 /* MTD */
 651 static struct resource mtd_resources[] = {
 652         [0] = { /* RedBoot config + filesystem flash */
 653                 .start  = VIPER_FLASH_PHYS,
 654                 .end    = VIPER_FLASH_PHYS + SZ_32M - 1,
 655                 .flags  = IORESOURCE_MEM,
 656         },
 657         [1] = { /* Boot flash */
 658                 .start  = VIPER_BOOT_PHYS,
 659                 .end    = VIPER_BOOT_PHYS + SZ_1M - 1,
 660                 .flags  = IORESOURCE_MEM,
 661         },
 662         [2] = { /*
 663                  * SRAM size is actually 256KB, 8bits, with a sparse mapping
 664                  * (each byte is on a 16bit boundary).
 665                  */
 666                 .start  = _VIPER_SRAM_BASE,
 667                 .end    = _VIPER_SRAM_BASE + SZ_512K - 1,
 668                 .flags  = IORESOURCE_MEM,
 669         },
 670 };
 671
 672 static struct mtd_partition viper_boot_flash_partition = {
 673         .name           = "RedBoot",
 674         .size           = SZ_1M,
 675         .offset         = 0,
 676         .mask_flags     = MTD_WRITEABLE,        /* force R/O */
 677 };
 678
 679 static struct physmap_flash_data viper_flash_data[] = {
 680         [0] = {
 681                 .width          = 2,
 682                 .parts          = NULL,
 683                 .nr_parts       = 0,
 684         },
 685         [1] = {
 686                 .width          = 2,
 687                 .parts          = &viper_boot_flash_partition,
 688                 .nr_parts       = 1,
 689         },
 690 };
 691
 692 static struct platform_device viper_mtd_devices[] = {
 693         [0] = {
 694                 .name           = "physmap-flash",
 695                 .id             = 0,
 696                 .dev            = {
 697                         .platform_data  = &viper_flash_data[0],
 698                 },
 699                 .resource       = &mtd_resources[0],
 700                 .num_resources  = 1,
 701         },
 702         [1] = {
 703                 .name           = "physmap-flash",
 704                 .id             = 1,
 705                 .dev            = {
 706                         .platform_data  = &viper_flash_data[1],
 707                 },
 708                 .resource       = &mtd_resources[1],
 709                 .num_resources  = 1,
 710         },
 711 };
 712
 713 static struct platform_device *viper_devs[] __initdata = {
 714         &smc91x_device,
 715         &i2c_bus_device,
 716         &serial_device,
 717         &isp116x_device,
 718         &viper_mtd_devices[0],
 719         &viper_mtd_devices[1],
 720         &viper_backlight_device,
 721         &viper_pcmcia_device,
 722 };
 723
 724 static mfp_cfg_t viper_pin_config[] __initdata = {
 725         /* Chip selects */
 726         GPIO15_nCS_1,
 727         GPIO78_nCS_2,
 728         GPIO79_nCS_3,
 729         GPIO80_nCS_4,
 730         GPIO33_nCS_5,
 731
 732         /* AC97 */
 733         GPIO28_AC97_BITCLK,
 734         GPIO29_AC97_SDATA_IN_0,
 735         GPIO30_AC97_SDATA_OUT,
 736         GPIO31_AC97_SYNC,
 737
 738         /* FP Backlight */
 739         GPIO9_GPIO,                             /* VIPER_BCKLIGHT_EN_GPIO */
 740         GPIO10_GPIO,                            /* VIPER_LCD_EN_GPIO */
 741         GPIO16_PWM0_OUT,
 742
 743         /* Ethernet PHY Ready */
 744         GPIO18_RDY,
 745
 746         /* Serial shutdown */
 747         GPIO12_GPIO | MFP_LPM_DRIVE_HIGH,       /* VIPER_UART_SHDN_GPIO */
 748
 749         /* Compact-Flash / PC104 */
 750         GPIO48_nPOE,
 751         GPIO49_nPWE,
 752         GPIO50_nPIOR,
 753         GPIO51_nPIOW,
 754         GPIO52_nPCE_1,
 755         GPIO53_nPCE_2,
 756         GPIO54_nPSKTSEL,
 757         GPIO55_nPREG,
 758         GPIO56_nPWAIT,
 759         GPIO57_nIOIS16,
 760         GPIO8_GPIO,                             /* VIPER_CF_RDY_GPIO */
 761         GPIO32_GPIO,                            /* VIPER_CF_CD_GPIO */
 762         GPIO82_GPIO,                            /* VIPER_CF_POWER_GPIO */
 763
 764         /* Integrated UPS control */
 765         GPIO20_GPIO,                            /* VIPER_UPS_GPIO */
 766
 767         /* Vcc regulator control */
 768         GPIO6_GPIO,                             /* VIPER_PSU_DATA_GPIO */
 769         GPIO11_GPIO,                            /* VIPER_PSU_CLK_GPIO */
 770         GPIO19_GPIO,                            /* VIPER_PSU_nCS_LD_GPIO */
 771
 772         /* i2c busses */
 773         GPIO26_GPIO,                            /* VIPER_TPM_I2C_SDA_GPIO */
 774         GPIO27_GPIO,                            /* VIPER_TPM_I2C_SCL_GPIO */
 775         GPIO83_GPIO,                            /* VIPER_RTC_I2C_SDA_GPIO */
 776         GPIO84_GPIO,                            /* VIPER_RTC_I2C_SCL_GPIO */
 777
 778         /* PC/104 Interrupt */
 779         GPIO1_GPIO | WAKEUP_ON_EDGE_RISE,       /* VIPER_CPLD_GPIO */
 780 };
 781
 782 static unsigned long viper_tpm;
 783
 784 static int __init viper_tpm_setup(char *str)
 785 {
 786         return kstrtoul(str, 10, &viper_tpm) >= 0;
 787 }
 788
 789 __setup("tpm=", viper_tpm_setup);
 790
 791 struct gpiod_lookup_table viper_tpm_i2c_gpiod_table = {
 792         .dev_id = "i2c-gpio.2",
 793         .table = {
 794                 GPIO_LOOKUP_IDX("gpio-pxa", VIPER_TPM_I2C_SDA_GPIO,
 795                                 NULL, 0, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
 796                 GPIO_LOOKUP_IDX("gpio-pxa", VIPER_TPM_I2C_SCL_GPIO,
 797                                 NULL, 1, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
 798         },
 799 };
 800
 801 static void __init viper_tpm_init(void)
 802 {
 803         struct platform_device *tpm_device;
 804         struct i2c_gpio_platform_data i2c_tpm_data = {
 805                 .udelay  = 10,
 806                 .timeout = HZ,
 807         };
 808         char *errstr;
 809
 810         /* Allocate TPM i2c bus if requested */
 811         if (!viper_tpm)
 812                 return;
 813
 814         gpiod_add_lookup_table(&viper_tpm_i2c_gpiod_table);
 815         tpm_device = platform_device_alloc("i2c-gpio", 2);
 816         if (tpm_device) {
 817                 if (!platform_device_add_data(tpm_device,
 818                                               &i2c_tpm_data,
 819                                               sizeof(i2c_tpm_data))) {
 820                         if (platform_device_add(tpm_device)) {
 821                                 errstr = "register TPM i2c bus";
 822                                 goto error_free_tpm;
 823                         }
 824                 } else {
 825                         errstr = "allocate TPM i2c bus data";
 826                         goto error_free_tpm;
 827                 }
 828         } else {
 829                 errstr = "allocate TPM i2c device";
 830                 goto error_tpm;
 831         }
 832
 833         return;
 834
 835 error_free_tpm:
 836         kfree(tpm_device);
 837 error_tpm:
 838         pr_err("viper: Couldn't %s, giving up\n", errstr);
 839 }
 840
 841 static void __init viper_init_vcore_gpios(void)
 842 {
 843         if (gpio_request(VIPER_PSU_DATA_GPIO, "PSU data"))
 844                 goto err_request_data;
 845
 846         if (gpio_request(VIPER_PSU_CLK_GPIO, "PSU clock"))
 847                 goto err_request_clk;
 848
 849         if (gpio_request(VIPER_PSU_nCS_LD_GPIO, "PSU cs"))
 850                 goto err_request_cs;
 851
 852         if (gpio_direction_output(VIPER_PSU_DATA_GPIO, 0) ||
 853             gpio_direction_output(VIPER_PSU_CLK_GPIO, 0) ||
 854             gpio_direction_output(VIPER_PSU_nCS_LD_GPIO, 0))
 855                 goto err_dir;
 856
 857         /* c/should assume redboot set the correct level ??? */
 858         viper_set_core_cpu_voltage(get_clk_frequency_khz(0), 1);
 859
 860         return;
 861
 862 err_dir:
 863         gpio_free(VIPER_PSU_nCS_LD_GPIO);
 864 err_request_cs:
 865         gpio_free(VIPER_PSU_CLK_GPIO);
 866 err_request_clk:
 867         gpio_free(VIPER_PSU_DATA_GPIO);
 868 err_request_data:
 869         pr_err("viper: Failed to setup vcore control GPIOs\n");
 870 }
 871
 872 static void __init viper_init_serial_gpio(void)
 873 {
 874         if (gpio_request(VIPER_UART_SHDN_GPIO, "UARTs shutdown"))
 875                 goto err_request;
 876
 877         if (gpio_direction_output(VIPER_UART_SHDN_GPIO, 0))
 878                 goto err_dir;
 879
 880         return;
 881
 882 err_dir:
 883         gpio_free(VIPER_UART_SHDN_GPIO);
 884 err_request:
 885         pr_err("viper: Failed to setup UART shutdown GPIO\n");
 886 }
 887
 888 #ifdef CONFIG_CPU_FREQ
 889 static int viper_cpufreq_notifier(struct notifier_block *nb,
 890                                   unsigned long val, void *data)
 891 {
 892         struct cpufreq_freqs *freq = data;
 893
 894         /* TODO: Adjust timings??? */
 895
 896         switch (val) {
 897         case CPUFREQ_PRECHANGE:
 898                 if (freq->old < freq->new) {
 899                         /* we are getting faster so raise the voltage
 900                          * before we change freq */
 901                         viper_set_core_cpu_voltage(freq->new, 0);
 902                 }
 903                 break;
 904         case CPUFREQ_POSTCHANGE:
 905                 if (freq->old > freq->new) {
 906                         /* we are slowing down so drop the power
 907                          * after we change freq */
 908                         viper_set_core_cpu_voltage(freq->new, 0);
 909                 }
 910                 break;
 911         default:
 912                 /* ignore */
 913                 break;
 914         }
 915
 916         return 0;
 917 }
 918
 919 static struct notifier_block viper_cpufreq_notifier_block = {
 920         .notifier_call  = viper_cpufreq_notifier
 921 };
 922
 923 static void __init viper_init_cpufreq(void)
 924 {
 925         if (cpufreq_register_notifier(&viper_cpufreq_notifier_block,
 926                                       CPUFREQ_TRANSITION_NOTIFIER))
 927                 pr_err("viper: Failed to setup cpufreq notifier\n");
 928 }
 929 #else
 930 static inline void viper_init_cpufreq(void) {}
 931 #endif
 932
 933 static void viper_power_off(void)
 934 {
 935         pr_notice("Shutting off UPS\n");
 936         gpio_set_value(VIPER_UPS_GPIO, 1);
 937         /* Spin to death... */
 938         while (1);
 939 }
 940
 941 static void __init viper_init(void)
 942 {
 943         u8 version;
 944
 945         pm_power_off = viper_power_off;
 946
 947         pxa2xx_mfp_config(ARRAY_AND_SIZE(viper_pin_config));
 948
 949         pxa_set_ffuart_info(NULL);
 950         pxa_set_btuart_info(NULL);
 951         pxa_set_stuart_info(NULL);
 952
 953         /* Wake-up serial console */
 954         viper_init_serial_gpio();
 955
 956         pxa_set_fb_info(NULL, &fb_info);
 957
 958         /* v1 hardware cannot use the datacs line */
 959         version = viper_hw_version();
 960         if (version == 0)
 961                 smc91x_device.num_resources--;
 962
 963         pxa_set_i2c_info(NULL);
 964         gpiod_add_lookup_table(&viper_i2c_gpiod_table);
 965         pwm_add_table(viper_pwm_lookup, ARRAY_SIZE(viper_pwm_lookup));
 966         platform_add_devices(viper_devs, ARRAY_SIZE(viper_devs));
 967
 968         viper_init_vcore_gpios();
 969         viper_init_cpufreq();
 970
 971         register_syscore_ops(&viper_cpu_syscore_ops);
 972
 973         if (version) {
 974                 pr_info("viper: hardware v%di%d detected. "
 975                         "CPLD revision %d.\n",
 976                         VIPER_BOARD_VERSION(version),
 977                         VIPER_BOARD_ISSUE(version),
 978                         VIPER_CPLD_REVISION(version));
 979                 system_rev = (VIPER_BOARD_VERSION(version) << 8) |
 980                              (VIPER_BOARD_ISSUE(version) << 4) |
 981                              VIPER_CPLD_REVISION(version);
 982         } else {
 983                 pr_info("viper: No version register.\n");
 984         }
 985
 986         i2c_register_board_info(1, ARRAY_AND_SIZE(viper_i2c_devices));
 987
 988         viper_tpm_init();
 989         pxa_set_ac97_info(NULL);
 990 }
 991
 992 static struct map_desc viper_io_desc[] __initdata = {
 993         {
 994                 .virtual = VIPER_CPLD_BASE,
 995                 .pfn     = __phys_to_pfn(VIPER_CPLD_PHYS),
 996                 .length  = 0x00300000,
 997                 .type    = MT_DEVICE,
 998         },
 999         {
1000                 .virtual = VIPER_PC104IO_BASE,
1001                 .pfn     = __phys_to_pfn(0x30000000),
1002                 .length  = 0x00800000,
1003                 .type    = MT_DEVICE,
1004         },
1005 };
1006
1007 static void __init viper_map_io(void)
1008 {
1009         pxa25x_map_io();
1010
1011         iotable_init(viper_io_desc, ARRAY_SIZE(viper_io_desc));
1012
1013         PCFR |= PCFR_OPDE;
1014 }
1015
1016 MACHINE_START(VIPER, "Arcom/Eurotech VIPER SBC")
1017         /* Maintainer: Marc Zyngier <maz@misterjones.org> */
1018         .atag_offset    = 0x100,
1019         .map_io         = viper_map_io,
1020         .nr_irqs        = PXA_NR_IRQS,
1021         .init_irq       = viper_init_irq,
1022         .handle_irq     = pxa25x_handle_irq,
1023         .init_time      = pxa_timer_init,
1024         .init_machine   = viper_init,
1025         .restart        = pxa_restart,
1026 MACHINE_END