arch/arm/mach-pxa/viper.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  *  linux/arch/arm/mach-pxa/viper.c
   4  *
   5  *  Support for the Arcom VIPER SBC.
   6  *
   7  *  Author:     Ian Campbell
   8  *  Created:    Feb 03, 2003
   9  *  Copyright:  Arcom Control Systems
  10  *
  11  *  Maintained by Marc Zyngier <maz@misterjones.org>
  12  *                             <marc.zyngier@altran.com>
  13  *
  14  * Based on lubbock.c:
  15  *  Author:     Nicolas Pitre
  16  *  Created:    Jun 15, 2001
  17  *  Copyright:  MontaVista Software Inc.
  18  */
  19
  20 #include <linux/types.h>
  21 #include <linux/memory.h>
  22 #include <linux/cpu.h>
  23 #include <linux/cpufreq.h>
  24 #include <linux/delay.h>
  25 #include <linux/fs.h>
  26 #include <linux/init.h>
  27 #include <linux/slab.h>
  28 #include <linux/interrupt.h>
  29 #include <linux/major.h>
  30 #include <linux/module.h>
  31 #include <linux/pm.h>
  32 #include <linux/sched.h>
  33 #include <linux/gpio.h>
  34 #include <linux/jiffies.h>
  35 #include <linux/platform_data/i2c-gpio.h>
  36 #include <linux/gpio/machine.h>
  37 #include <linux/platform_data/i2c-pxa.h>
  38 #include <linux/serial_8250.h>
  39 #include <linux/smc91x.h>
  40 #include <linux/pwm.h>
  41 #include <linux/pwm_backlight.h>
  42 #include <linux/usb/isp116x.h>
  43 #include <linux/mtd/mtd.h>
  44 #include <linux/mtd/partitions.h>
  45 #include <linux/mtd/physmap.h>
  46 #include <linux/syscore_ops.h>
  47
  48 #include "pxa25x.h"
  49 #include <mach/audio.h>
  50 #include <linux/platform_data/video-pxafb.h>
  51 #include <mach/regs-uart.h>
  52 #include <linux/platform_data/pcmcia-pxa2xx_viper.h>
  53 #include "viper.h"
  54
  55 #include <asm/setup.h>
  56 #include <asm/mach-types.h>
  57 #include <asm/irq.h>
  58 #include <linux/sizes.h>
  59 #include <asm/system_info.h>
  60
  61 #include <asm/mach/arch.h>
  62 #include <asm/mach/map.h>
  63 #include <asm/mach/irq.h>
  64
  65 #include "generic.h"
  66 #include "devices.h"
  67
  68 static unsigned int icr;
  69
  70 static void viper_icr_set_bit(unsigned int bit)
  71 {
  72         icr |= bit;
  73         VIPER_ICR = icr;
  74 }
  75
  76 static void viper_icr_clear_bit(unsigned int bit)
  77 {
  78         icr &= ~bit;
  79         VIPER_ICR = icr;
  80 }
  81
  82 /* This function is used from the pcmcia module to reset the CF */
  83 static void viper_cf_reset(int state)
  84 {
  85         if (state)
  86                 viper_icr_set_bit(VIPER_ICR_CF_RST);
  87         else
  88                 viper_icr_clear_bit(VIPER_ICR_CF_RST);
  89 }
  90
  91 static struct arcom_pcmcia_pdata viper_pcmcia_info = {
  92         .cd_gpio        = VIPER_CF_CD_GPIO,
  93         .rdy_gpio       = VIPER_CF_RDY_GPIO,
  94         .pwr_gpio       = VIPER_CF_POWER_GPIO,
  95         .reset          = viper_cf_reset,
  96 };
  97
  98 static struct platform_device viper_pcmcia_device = {
  99         .name           = "viper-pcmcia",
 100         .id             = -1,
 101         .dev            = {
 102                 .platform_data  = &viper_pcmcia_info,
 103         },
 104 };
 105
 106 /*
 107  * The CPLD version register was not present on VIPER boards prior to
 108  * v2i1. On v1 boards where the version register is not present we
 109  * will just read back the previous value from the databus.
 110  *
 111  * Therefore we do two reads. The first time we write 0 to the
 112  * (read-only) register before reading and the second time we write
 113  * 0xff first. If the two reads do not match or they read back as 0xff
 114  * or 0x00 then we have version 1 hardware.
 115  */
 116 static u8 viper_hw_version(void)
 117 {
 118         u8 v1, v2;
 119         unsigned long flags;
 120
 121         local_irq_save(flags);
 122
 123         VIPER_VERSION = 0;
 124         v1 = VIPER_VERSION;
 125         VIPER_VERSION = 0xff;
 126         v2 = VIPER_VERSION;
 127
 128         v1 = (v1 != v2 || v1 == 0xff) ? 0 : v1;
 129
 130         local_irq_restore(flags);
 131         return v1;
 132 }
 133
 134 /* CPU system core operations. */
 135 static int viper_cpu_suspend(void)
 136 {
 137         viper_icr_set_bit(VIPER_ICR_R_DIS);
 138         return 0;
 139 }
 140
 141 static void viper_cpu_resume(void)
 142 {
 143         viper_icr_clear_bit(VIPER_ICR_R_DIS);
 144 }
 145
 146 static struct syscore_ops viper_cpu_syscore_ops = {
 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(struct irq_desc *desc)
 279 {
 280         unsigned int irq;
 281         unsigned long pending;
 282
 283         pending = viper_irq_pending();
 284         do {
 285                 /* we're in a chained irq handler,
 286                  * so ack the interrupt by hand */
 287                 desc->irq_data.chip->irq_ack(&desc->irq_data);
 288
 289                 if (likely(pending)) {
 290                         irq = viper_bit_to_irq(__ffs(pending));
 291                         generic_handle_irq(irq);
 292                 }
 293                 pending = viper_irq_pending();
 294         } while (pending);
 295 }
 296
 297 static struct irq_chip viper_irq_chip = {
 298         .name           = "ISA",
 299         .irq_ack        = viper_ack_irq,
 300         .irq_mask       = viper_mask_irq,
 301         .irq_unmask     = viper_unmask_irq
 302 };
 303
 304 static void __init viper_init_irq(void)
 305 {
 306         int level;
 307         int isa_irq;
 308
 309         pxa25x_init_irq();
 310
 311         /* setup ISA IRQs */
 312         for (level = 0; level < ARRAY_SIZE(viper_isa_irqs); level++) {
 313                 isa_irq = viper_bit_to_irq(level);
 314                 irq_set_chip_and_handler(isa_irq, &viper_irq_chip,
 315                                          handle_edge_irq);
 316                 irq_clear_status_flags(isa_irq, IRQ_NOREQUEST | IRQ_NOPROBE);
 317         }
 318
 319         irq_set_chained_handler(gpio_to_irq(VIPER_CPLD_GPIO),
 320                                 viper_irq_handler);
 321         irq_set_irq_type(gpio_to_irq(VIPER_CPLD_GPIO), IRQ_TYPE_EDGE_BOTH);
 322 }
 323
 324 /* Flat Panel */
 325 static struct pxafb_mode_info fb_mode_info[] = {
 326         {
 327                 .pixclock       = 157500,
 328
 329                 .xres           = 320,
 330                 .yres           = 240,
 331
 332                 .bpp            = 16,
 333
 334                 .hsync_len      = 63,
 335                 .left_margin    = 7,
 336                 .right_margin   = 13,
 337
 338                 .vsync_len      = 20,
 339                 .upper_margin   = 0,
 340                 .lower_margin   = 0,
 341
 342                 .sync           = 0,
 343         },
 344 };
 345
 346 static struct pxafb_mach_info fb_info = {
 347         .modes                  = fb_mode_info,
 348         .num_modes              = 1,
 349         .lcd_conn               = LCD_COLOR_TFT_16BPP | LCD_PCLK_EDGE_FALL,
 350 };
 351
 352 static struct pwm_lookup viper_pwm_lookup[] = {
 353         PWM_LOOKUP("pxa25x-pwm.0", 0, "pwm-backlight.0", NULL, 1000000,
 354                    PWM_POLARITY_NORMAL),
 355 };
 356
 357 static int viper_backlight_init(struct device *dev)
 358 {
 359         int ret;
 360
 361         /* GPIO9 and 10 control FB backlight. Initialise to off */
 362         ret = gpio_request(VIPER_BCKLIGHT_EN_GPIO, "Backlight");
 363         if (ret)
 364                 goto err_request_bckl;
 365
 366         ret = gpio_request(VIPER_LCD_EN_GPIO, "LCD");
 367         if (ret)
 368                 goto err_request_lcd;
 369
 370         ret = gpio_direction_output(VIPER_BCKLIGHT_EN_GPIO, 0);
 371         if (ret)
 372                 goto err_dir;
 373
 374         ret = gpio_direction_output(VIPER_LCD_EN_GPIO, 0);
 375         if (ret)
 376                 goto err_dir;
 377
 378         return 0;
 379
 380 err_dir:
 381         gpio_free(VIPER_LCD_EN_GPIO);
 382 err_request_lcd:
 383         gpio_free(VIPER_BCKLIGHT_EN_GPIO);
 384 err_request_bckl:
 385         dev_err(dev, "Failed to setup LCD GPIOs\n");
 386
 387         return ret;
 388 }
 389
 390 static int viper_backlight_notify(struct device *dev, int brightness)
 391 {
 392         gpio_set_value(VIPER_LCD_EN_GPIO, !!brightness);
 393         gpio_set_value(VIPER_BCKLIGHT_EN_GPIO, !!brightness);
 394
 395         return brightness;
 396 }
 397
 398 static void viper_backlight_exit(struct device *dev)
 399 {
 400         gpio_free(VIPER_LCD_EN_GPIO);
 401         gpio_free(VIPER_BCKLIGHT_EN_GPIO);
 402 }
 403
 404 static struct platform_pwm_backlight_data viper_backlight_data = {
 405         .max_brightness = 100,
 406         .dft_brightness = 100,
 407         .enable_gpio    = -1,
 408         .init           = viper_backlight_init,
 409         .notify         = viper_backlight_notify,
 410         .exit           = viper_backlight_exit,
 411 };
 412
 413 static struct platform_device viper_backlight_device = {
 414         .name           = "pwm-backlight",
 415         .dev            = {
 416                 .parent         = &pxa25x_device_pwm0.dev,
 417                 .platform_data  = &viper_backlight_data,
 418         },
 419 };
 420
 421 /* Ethernet */
 422 static struct resource smc91x_resources[] = {
 423         [0] = {
 424                 .name   = "smc91x-regs",
 425                 .start  = VIPER_ETH_PHYS + 0x300,
 426                 .end    = VIPER_ETH_PHYS + 0x30f,
 427                 .flags  = IORESOURCE_MEM,
 428         },
 429         [1] = {
 430                 .start  = PXA_GPIO_TO_IRQ(VIPER_ETH_GPIO),
 431                 .end    = PXA_GPIO_TO_IRQ(VIPER_ETH_GPIO),
 432                 .flags  = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
 433         },
 434         [2] = {
 435                 .name   = "smc91x-data32",
 436                 .start  = VIPER_ETH_DATA_PHYS,
 437                 .end    = VIPER_ETH_DATA_PHYS + 3,
 438                 .flags  = IORESOURCE_MEM,
 439         },
 440 };
 441
 442 static struct smc91x_platdata viper_smc91x_info = {
 443         .flags  = SMC91X_USE_16BIT | SMC91X_NOWAIT,
 444         .leda   = RPC_LED_100_10,
 445         .ledb   = RPC_LED_TX_RX,
 446 };
 447
 448 static struct platform_device smc91x_device = {
 449         .name           = "smc91x",
 450         .id             = -1,
 451         .num_resources  = ARRAY_SIZE(smc91x_resources),
 452         .resource       = smc91x_resources,
 453         .dev            = {
 454                 .platform_data  = &viper_smc91x_info,
 455         },
 456 };
 457
 458 /* i2c */
 459 static struct gpiod_lookup_table viper_i2c_gpiod_table = {
 460         .dev_id         = "i2c-gpio.1",
 461         .table          = {
 462                 GPIO_LOOKUP_IDX("gpio-pxa", VIPER_RTC_I2C_SDA_GPIO,
 463                                 NULL, 0, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
 464                 GPIO_LOOKUP_IDX("gpio-pxa", VIPER_RTC_I2C_SCL_GPIO,
 465                                 NULL, 1, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
 466         },
 467 };
 468
 469 static struct i2c_gpio_platform_data i2c_bus_data = {
 470         .udelay  = 10,
 471         .timeout = HZ,
 472 };
 473
 474 static struct platform_device i2c_bus_device = {
 475         .name           = "i2c-gpio",
 476         .id             = 1, /* pxa2xx-i2c is bus 0, so start at 1 */
 477         .dev = {
 478                 .platform_data = &i2c_bus_data,
 479         }
 480 };
 481
 482 static struct i2c_board_info __initdata viper_i2c_devices[] = {
 483         {
 484                 I2C_BOARD_INFO("ds1338", 0x68),
 485         },
 486 };
 487
 488 /*
 489  * Serial configuration:
 490  * You can either have the standard PXA ports driven by the PXA driver,
 491  * or all the ports (PXA + 16850) driven by the 8250 driver.
 492  * Choose your poison.
 493  */
 494
 495 static struct resource viper_serial_resources[] = {
 496 #ifndef CONFIG_SERIAL_PXA
 497         {
 498                 .start  = 0x40100000,
 499                 .end    = 0x4010001f,
 500                 .flags  = IORESOURCE_MEM,
 501         },
 502         {
 503                 .start  = 0x40200000,
 504                 .end    = 0x4020001f,
 505                 .flags  = IORESOURCE_MEM,
 506         },
 507         {
 508                 .start  = 0x40700000,
 509                 .end    = 0x4070001f,
 510                 .flags  = IORESOURCE_MEM,
 511         },
 512         {
 513                 .start  = VIPER_UARTA_PHYS,
 514                 .end    = VIPER_UARTA_PHYS + 0xf,
 515                 .flags  = IORESOURCE_MEM,
 516         },
 517         {
 518                 .start  = VIPER_UARTB_PHYS,
 519                 .end    = VIPER_UARTB_PHYS + 0xf,
 520                 .flags  = IORESOURCE_MEM,
 521         },
 522 #else
 523         {
 524                 0,
 525         },
 526 #endif
 527 };
 528
 529 static struct plat_serial8250_port serial_platform_data[] = {
 530 #ifndef CONFIG_SERIAL_PXA
 531         /* Internal UARTs */
 532         {
 533                 .membase        = (void *)&FFUART,
 534                 .mapbase        = __PREG(FFUART),
 535                 .irq            = IRQ_FFUART,
 536                 .uartclk        = 921600 * 16,
 537                 .regshift       = 2,
 538                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
 539                 .iotype         = UPIO_MEM,
 540         },
 541         {
 542                 .membase        = (void *)&BTUART,
 543                 .mapbase        = __PREG(BTUART),
 544                 .irq            = IRQ_BTUART,
 545                 .uartclk        = 921600 * 16,
 546                 .regshift       = 2,
 547                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
 548                 .iotype         = UPIO_MEM,
 549         },
 550         {
 551                 .membase        = (void *)&STUART,
 552                 .mapbase        = __PREG(STUART),
 553                 .irq            = IRQ_STUART,
 554                 .uartclk        = 921600 * 16,
 555                 .regshift       = 2,
 556                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
 557                 .iotype         = UPIO_MEM,
 558         },
 559         /* External UARTs */
 560         {
 561                 .mapbase        = VIPER_UARTA_PHYS,
 562                 .irq            = PXA_GPIO_TO_IRQ(VIPER_UARTA_GPIO),
 563                 .irqflags       = IRQF_TRIGGER_RISING,
 564                 .uartclk        = 1843200,
 565                 .regshift       = 1,
 566                 .iotype         = UPIO_MEM,
 567                 .flags          = UPF_BOOT_AUTOCONF | UPF_IOREMAP |
 568                                   UPF_SKIP_TEST,
 569         },
 570         {
 571                 .mapbase        = VIPER_UARTB_PHYS,
 572                 .irq            = PXA_GPIO_TO_IRQ(VIPER_UARTB_GPIO),
 573                 .irqflags       = IRQF_TRIGGER_RISING,
 574                 .uartclk        = 1843200,
 575                 .regshift       = 1,
 576                 .iotype         = UPIO_MEM,
 577                 .flags          = UPF_BOOT_AUTOCONF | UPF_IOREMAP |
 578                                   UPF_SKIP_TEST,
 579         },
 580 #endif
 581         { },
 582 };
 583
 584 static struct platform_device serial_device = {
 585         .name                   = "serial8250",
 586         .id                     = 0,
 587         .dev                    = {
 588                 .platform_data  = serial_platform_data,
 589         },
 590         .num_resources          = ARRAY_SIZE(viper_serial_resources),
 591         .resource               = viper_serial_resources,
 592 };
 593
 594 /* USB */
 595 static void isp116x_delay(struct device *dev, int delay)
 596 {
 597         ndelay(delay);
 598 }
 599
 600 static struct resource isp116x_resources[] = {
 601         [0] = { /* DATA */
 602                 .start  = VIPER_USB_PHYS + 0,
 603                 .end    = VIPER_USB_PHYS + 1,
 604                 .flags  = IORESOURCE_MEM,
 605         },
 606         [1] = { /* ADDR */
 607                 .start  = VIPER_USB_PHYS + 2,
 608                 .end    = VIPER_USB_PHYS + 3,
 609                 .flags  = IORESOURCE_MEM,
 610         },
 611         [2] = {
 612                 .start  = PXA_GPIO_TO_IRQ(VIPER_USB_GPIO),
 613                 .end    = PXA_GPIO_TO_IRQ(VIPER_USB_GPIO),
 614                 .flags  = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
 615         },
 616 };
 617
 618 /* (DataBusWidth16|AnalogOCEnable|DREQOutputPolarity|DownstreamPort15KRSel ) */
 619 static struct isp116x_platform_data isp116x_platform_data = {
 620         /* Enable internal resistors on downstream ports */
 621         .sel15Kres              = 1,
 622         /* On-chip overcurrent protection */
 623         .oc_enable              = 1,
 624         /* INT output polarity */
 625         .int_act_high           = 1,
 626         /* INT edge or level triggered */
 627         .int_edge_triggered     = 0,
 628
 629         /* WAKEUP pin connected - NOT SUPPORTED  */
 630         /* .remote_wakeup_connected = 0, */
 631         /* Wakeup by devices on usb bus enabled */
 632         .remote_wakeup_enable   = 0,
 633         .delay                  = isp116x_delay,
 634 };
 635
 636 static struct platform_device isp116x_device = {
 637         .name                   = "isp116x-hcd",
 638         .id                     = -1,
 639         .num_resources          = ARRAY_SIZE(isp116x_resources),
 640         .resource               = isp116x_resources,
 641         .dev                    = {
 642                 .platform_data  = &isp116x_platform_data,
 643         },
 644
 645 };
 646
 647 /* MTD */
 648 static struct resource mtd_resources[] = {
 649         [0] = { /* RedBoot config + filesystem flash */
 650                 .start  = VIPER_FLASH_PHYS,
 651                 .end    = VIPER_FLASH_PHYS + SZ_32M - 1,
 652                 .flags  = IORESOURCE_MEM,
 653         },
 654         [1] = { /* Boot flash */
 655                 .start  = VIPER_BOOT_PHYS,
 656                 .end    = VIPER_BOOT_PHYS + SZ_1M - 1,
 657                 .flags  = IORESOURCE_MEM,
 658         },
 659         [2] = { /*
 660                  * SRAM size is actually 256KB, 8bits, with a sparse mapping
 661                  * (each byte is on a 16bit boundary).
 662                  */
 663                 .start  = _VIPER_SRAM_BASE,
 664                 .end    = _VIPER_SRAM_BASE + SZ_512K - 1,
 665                 .flags  = IORESOURCE_MEM,
 666         },
 667 };
 668
 669 static struct mtd_partition viper_boot_flash_partition = {
 670         .name           = "RedBoot",
 671         .size           = SZ_1M,
 672         .offset         = 0,
 673         .mask_flags     = MTD_WRITEABLE,        /* force R/O */
 674 };
 675
 676 static struct physmap_flash_data viper_flash_data[] = {
 677         [0] = {
 678                 .width          = 2,
 679                 .parts          = NULL,
 680                 .nr_parts       = 0,
 681         },
 682         [1] = {
 683                 .width          = 2,
 684                 .parts          = &viper_boot_flash_partition,
 685                 .nr_parts       = 1,
 686         },
 687 };
 688
 689 static struct platform_device viper_mtd_devices[] = {
 690         [0] = {
 691                 .name           = "physmap-flash",
 692                 .id             = 0,
 693                 .dev            = {
 694                         .platform_data  = &viper_flash_data[0],
 695                 },
 696                 .resource       = &mtd_resources[0],
 697                 .num_resources  = 1,
 698         },
 699         [1] = {
 700                 .name           = "physmap-flash",
 701                 .id             = 1,
 702                 .dev            = {
 703                         .platform_data  = &viper_flash_data[1],
 704                 },
 705                 .resource       = &mtd_resources[1],
 706                 .num_resources  = 1,
 707         },
 708 };
 709
 710 static struct platform_device *viper_devs[] __initdata = {
 711         &smc91x_device,
 712         &i2c_bus_device,
 713         &serial_device,
 714         &isp116x_device,
 715         &viper_mtd_devices[0],
 716         &viper_mtd_devices[1],
 717         &viper_backlight_device,
 718         &viper_pcmcia_device,
 719 };
 720
 721 static mfp_cfg_t viper_pin_config[] __initdata = {
 722         /* Chip selects */
 723         GPIO15_nCS_1,
 724         GPIO78_nCS_2,
 725         GPIO79_nCS_3,
 726         GPIO80_nCS_4,
 727         GPIO33_nCS_5,
 728
 729         /* AC97 */
 730         GPIO28_AC97_BITCLK,
 731         GPIO29_AC97_SDATA_IN_0,
 732         GPIO30_AC97_SDATA_OUT,
 733         GPIO31_AC97_SYNC,
 734
 735         /* FP Backlight */
 736         GPIO9_GPIO,                             /* VIPER_BCKLIGHT_EN_GPIO */
 737         GPIO10_GPIO,                            /* VIPER_LCD_EN_GPIO */
 738         GPIO16_PWM0_OUT,
 739
 740         /* Ethernet PHY Ready */
 741         GPIO18_RDY,
 742
 743         /* Serial shutdown */
 744         GPIO12_GPIO | MFP_LPM_DRIVE_HIGH,       /* VIPER_UART_SHDN_GPIO */
 745
 746         /* Compact-Flash / PC104 */
 747         GPIO48_nPOE,
 748         GPIO49_nPWE,
 749         GPIO50_nPIOR,
 750         GPIO51_nPIOW,
 751         GPIO52_nPCE_1,
 752         GPIO53_nPCE_2,
 753         GPIO54_nPSKTSEL,
 754         GPIO55_nPREG,
 755         GPIO56_nPWAIT,
 756         GPIO57_nIOIS16,
 757         GPIO8_GPIO,                             /* VIPER_CF_RDY_GPIO */
 758         GPIO32_GPIO,                            /* VIPER_CF_CD_GPIO */
 759         GPIO82_GPIO,                            /* VIPER_CF_POWER_GPIO */
 760
 761         /* Integrated UPS control */
 762         GPIO20_GPIO,                            /* VIPER_UPS_GPIO */
 763
 764         /* Vcc regulator control */
 765         GPIO6_GPIO,                             /* VIPER_PSU_DATA_GPIO */
 766         GPIO11_GPIO,                            /* VIPER_PSU_CLK_GPIO */
 767         GPIO19_GPIO,                            /* VIPER_PSU_nCS_LD_GPIO */
 768
 769         /* i2c busses */
 770         GPIO26_GPIO,                            /* VIPER_TPM_I2C_SDA_GPIO */
 771         GPIO27_GPIO,                            /* VIPER_TPM_I2C_SCL_GPIO */
 772         GPIO83_GPIO,                            /* VIPER_RTC_I2C_SDA_GPIO */
 773         GPIO84_GPIO,                            /* VIPER_RTC_I2C_SCL_GPIO */
 774
 775         /* PC/104 Interrupt */
 776         GPIO1_GPIO | WAKEUP_ON_EDGE_RISE,       /* VIPER_CPLD_GPIO */
 777 };
 778
 779 static unsigned long viper_tpm;
 780
 781 static int __init viper_tpm_setup(char *str)
 782 {
 783         return kstrtoul(str, 10, &viper_tpm) >= 0;
 784 }
 785
 786 __setup("tpm=", viper_tpm_setup);
 787
 788 struct gpiod_lookup_table viper_tpm_i2c_gpiod_table = {
 789         .dev_id = "i2c-gpio.2",
 790         .table = {
 791                 GPIO_LOOKUP_IDX("gpio-pxa", VIPER_TPM_I2C_SDA_GPIO,
 792                                 NULL, 0, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
 793                 GPIO_LOOKUP_IDX("gpio-pxa", VIPER_TPM_I2C_SCL_GPIO,
 794                                 NULL, 1, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
 795         },
 796 };
 797
 798 static void __init viper_tpm_init(void)
 799 {
 800         struct platform_device *tpm_device;
 801         struct i2c_gpio_platform_data i2c_tpm_data = {
 802                 .udelay  = 10,
 803                 .timeout = HZ,
 804         };
 805         char *errstr;
 806
 807         /* Allocate TPM i2c bus if requested */
 808         if (!viper_tpm)
 809                 return;
 810
 811         gpiod_add_lookup_table(&viper_tpm_i2c_gpiod_table);
 812         tpm_device = platform_device_alloc("i2c-gpio", 2);
 813         if (tpm_device) {
 814                 if (!platform_device_add_data(tpm_device,
 815                                               &i2c_tpm_data,
 816                                               sizeof(i2c_tpm_data))) {
 817                         if (platform_device_add(tpm_device)) {
 818                                 errstr = "register TPM i2c bus";
 819                                 goto error_free_tpm;
 820                         }
 821                 } else {
 822                         errstr = "allocate TPM i2c bus data";
 823                         goto error_free_tpm;
 824                 }
 825         } else {
 826                 errstr = "allocate TPM i2c device";
 827                 goto error_tpm;
 828         }
 829
 830         return;
 831
 832 error_free_tpm:
 833         kfree(tpm_device);
 834 error_tpm:
 835         pr_err("viper: Couldn't %s, giving up\n", errstr);
 836 }
 837
 838 static void __init viper_init_vcore_gpios(void)
 839 {
 840         if (gpio_request(VIPER_PSU_DATA_GPIO, "PSU data"))
 841                 goto err_request_data;
 842
 843         if (gpio_request(VIPER_PSU_CLK_GPIO, "PSU clock"))
 844                 goto err_request_clk;
 845
 846         if (gpio_request(VIPER_PSU_nCS_LD_GPIO, "PSU cs"))
 847                 goto err_request_cs;
 848
 849         if (gpio_direction_output(VIPER_PSU_DATA_GPIO, 0) ||
 850             gpio_direction_output(VIPER_PSU_CLK_GPIO, 0) ||
 851             gpio_direction_output(VIPER_PSU_nCS_LD_GPIO, 0))
 852                 goto err_dir;
 853
 854         /* c/should assume redboot set the correct level ??? */
 855         viper_set_core_cpu_voltage(get_clk_frequency_khz(0), 1);
 856
 857         return;
 858
 859 err_dir:
 860         gpio_free(VIPER_PSU_nCS_LD_GPIO);
 861 err_request_cs:
 862         gpio_free(VIPER_PSU_CLK_GPIO);
 863 err_request_clk:
 864         gpio_free(VIPER_PSU_DATA_GPIO);
 865 err_request_data:
 866         pr_err("viper: Failed to setup vcore control GPIOs\n");
 867 }
 868
 869 static void __init viper_init_serial_gpio(void)
 870 {
 871         if (gpio_request(VIPER_UART_SHDN_GPIO, "UARTs shutdown"))
 872                 goto err_request;
 873
 874         if (gpio_direction_output(VIPER_UART_SHDN_GPIO, 0))
 875                 goto err_dir;
 876
 877         return;
 878
 879 err_dir:
 880         gpio_free(VIPER_UART_SHDN_GPIO);
 881 err_request:
 882         pr_err("viper: Failed to setup UART shutdown GPIO\n");
 883 }
 884
 885 #ifdef CONFIG_CPU_FREQ
 886 static int viper_cpufreq_notifier(struct notifier_block *nb,
 887                                   unsigned long val, void *data)
 888 {
 889         struct cpufreq_freqs *freq = data;
 890
 891         /* TODO: Adjust timings??? */
 892
 893         switch (val) {
 894         case CPUFREQ_PRECHANGE:
 895                 if (freq->old < freq->new) {
 896                         /* we are getting faster so raise the voltage
 897                          * before we change freq */
 898                         viper_set_core_cpu_voltage(freq->new, 0);
 899                 }
 900                 break;
 901         case CPUFREQ_POSTCHANGE:
 902                 if (freq->old > freq->new) {
 903                         /* we are slowing down so drop the power
 904                          * after we change freq */
 905                         viper_set_core_cpu_voltage(freq->new, 0);
 906                 }
 907                 break;
 908         default:
 909                 /* ignore */
 910                 break;
 911         }
 912
 913         return 0;
 914 }
 915
 916 static struct notifier_block viper_cpufreq_notifier_block = {
 917         .notifier_call  = viper_cpufreq_notifier
 918 };
 919
 920 static void __init viper_init_cpufreq(void)
 921 {
 922         if (cpufreq_register_notifier(&viper_cpufreq_notifier_block,
 923                                       CPUFREQ_TRANSITION_NOTIFIER))
 924                 pr_err("viper: Failed to setup cpufreq notifier\n");
 925 }
 926 #else
 927 static inline void viper_init_cpufreq(void) {}
 928 #endif
 929
 930 static void viper_power_off(void)
 931 {
 932         pr_notice("Shutting off UPS\n");
 933         gpio_set_value(VIPER_UPS_GPIO, 1);
 934         /* Spin to death... */
 935         while (1);
 936 }
 937
 938 static void __init viper_init(void)
 939 {
 940         u8 version;
 941
 942         pm_power_off = viper_power_off;
 943
 944         pxa2xx_mfp_config(ARRAY_AND_SIZE(viper_pin_config));
 945
 946         pxa_set_ffuart_info(NULL);
 947         pxa_set_btuart_info(NULL);
 948         pxa_set_stuart_info(NULL);
 949
 950         /* Wake-up serial console */
 951         viper_init_serial_gpio();
 952
 953         pxa_set_fb_info(NULL, &fb_info);
 954
 955         /* v1 hardware cannot use the datacs line */
 956         version = viper_hw_version();
 957         if (version == 0)
 958                 smc91x_device.num_resources--;
 959
 960         pxa_set_i2c_info(NULL);
 961         gpiod_add_lookup_table(&viper_i2c_gpiod_table);
 962         pwm_add_table(viper_pwm_lookup, ARRAY_SIZE(viper_pwm_lookup));
 963         platform_add_devices(viper_devs, ARRAY_SIZE(viper_devs));
 964
 965         viper_init_vcore_gpios();
 966         viper_init_cpufreq();
 967
 968         register_syscore_ops(&viper_cpu_syscore_ops);
 969
 970         if (version) {
 971                 pr_info("viper: hardware v%di%d detected. "
 972                         "CPLD revision %d.\n",
 973                         VIPER_BOARD_VERSION(version),
 974                         VIPER_BOARD_ISSUE(version),
 975                         VIPER_CPLD_REVISION(version));
 976                 system_rev = (VIPER_BOARD_VERSION(version) << 8) |
 977                              (VIPER_BOARD_ISSUE(version) << 4) |
 978                              VIPER_CPLD_REVISION(version);
 979         } else {
 980                 pr_info("viper: No version register.\n");
 981         }
 982
 983         i2c_register_board_info(1, ARRAY_AND_SIZE(viper_i2c_devices));
 984
 985         viper_tpm_init();
 986         pxa_set_ac97_info(NULL);
 987 }
 988
 989 static struct map_desc viper_io_desc[] __initdata = {
 990         {
 991                 .virtual = VIPER_CPLD_BASE,
 992                 .pfn     = __phys_to_pfn(VIPER_CPLD_PHYS),
 993                 .length  = 0x00300000,
 994                 .type    = MT_DEVICE,
 995         },
 996         {
 997                 .virtual = VIPER_PC104IO_BASE,
 998                 .pfn     = __phys_to_pfn(0x30000000),
 999                 .length  = 0x00800000,
1000                 .type    = MT_DEVICE,
1001         },
1002 };
1003
1004 static void __init viper_map_io(void)
1005 {
1006         pxa25x_map_io();
1007
1008         iotable_init(viper_io_desc, ARRAY_SIZE(viper_io_desc));
1009
1010         PCFR |= PCFR_OPDE;
1011 }
1012
1013 MACHINE_START(VIPER, "Arcom/Eurotech VIPER SBC")
1014         /* Maintainer: Marc Zyngier <maz@misterjones.org> */
1015         .atag_offset    = 0x100,
1016         .map_io         = viper_map_io,
1017         .nr_irqs        = PXA_NR_IRQS,
1018         .init_irq       = viper_init_irq,
1019         .handle_irq     = pxa25x_handle_irq,
1020         .init_time      = pxa_timer_init,
1021         .init_machine   = viper_init,
1022         .restart        = pxa_restart,
1023 MACHINE_END