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zeus.c

/*
 *  Support for the Arcom ZEUS.
 *
 *  Copyright (C) 2006 Arcom Control Systems Ltd.
 *
 *  Loosely based on Arcom's 2.6.16.28.
 *  Maintained by Marc Zyngier <maz@misterjones.org>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License version 2 as
 *  published by the Free Software Foundation.
 */

#include <linux/cpufreq.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/pm.h>
#include <linux/gpio.h>
#include <linux/serial_8250.h>
#include <linux/dm9000.h>
#include <linux/mmc/host.h>
#include <linux/spi/spi.h>
#include <linux/spi/pxa2xx_spi.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/mtd/physmap.h>
#include <linux/i2c.h>
#include <linux/i2c/pca953x.h>
#include <linux/apm-emulation.h>
#include <linux/can/platform/mcp251x.h>

#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>

#include <plat/i2c.h>

#include <mach/pxa2xx-regs.h>
#include <mach/regs-uart.h>
#include <mach/ohci.h>
#include <mach/mmc.h>
#include <mach/pxa27x-udc.h>
#include <mach/udc.h>
#include <mach/pxafb.h>
#include <mach/mfp-pxa27x.h>
#include <mach/pm.h>
#include <mach/audio.h>
#include <mach/arcom-pcmcia.h>
#include <mach/zeus.h>
#include <mach/smemc.h>

#include "generic.h"

/*
 * Interrupt handling
 */

static unsigned long zeus_irq_enabled_mask;
static const int zeus_isa_irqs[] = { 3, 4, 5, 6, 7, 10, 11, 12, };
static const int zeus_isa_irq_map[] = {
      0,          /* ISA irq #0, invalid */
      0,          /* ISA irq #1, invalid */
      0,          /* ISA irq #2, invalid */
      1 << 0,           /* ISA irq #3 */
      1 << 1,           /* ISA irq #4 */
      1 << 2,           /* ISA irq #5 */
      1 << 3,           /* ISA irq #6 */
      1 << 4,           /* ISA irq #7 */
      0,          /* ISA irq #8, invalid */
      0,          /* ISA irq #9, invalid */
      1 << 5,           /* ISA irq #10 */
      1 << 6,           /* ISA irq #11 */
      1 << 7,           /* ISA irq #12 */
};

static inline int zeus_irq_to_bitmask(unsigned int irq)
{
      return zeus_isa_irq_map[irq - PXA_ISA_IRQ(0)];
}

static inline int zeus_bit_to_irq(int bit)
{
      return zeus_isa_irqs[bit] + PXA_ISA_IRQ(0);
}

static void zeus_ack_irq(struct irq_data *d)
{
      __raw_writew(zeus_irq_to_bitmask(d->irq), ZEUS_CPLD_ISA_IRQ);
}

static void zeus_mask_irq(struct irq_data *d)
{
      zeus_irq_enabled_mask &= ~(zeus_irq_to_bitmask(d->irq));
}

static void zeus_unmask_irq(struct irq_data *d)
{
      zeus_irq_enabled_mask |= zeus_irq_to_bitmask(d->irq);
}

static inline unsigned long zeus_irq_pending(void)
{
      return __raw_readw(ZEUS_CPLD_ISA_IRQ) & zeus_irq_enabled_mask;
}

static void zeus_irq_handler(unsigned int irq, struct irq_desc *desc)
{
      unsigned long pending;

      pending = zeus_irq_pending();
      do {
            /* we're in a chained irq handler,
             * so ack the interrupt by hand */
            desc->irq_data.chip->irq_ack(&desc->irq_data);

            if (likely(pending)) {
                  irq = zeus_bit_to_irq(__ffs(pending));
                  generic_handle_irq(irq);
            }
            pending = zeus_irq_pending();
      } while (pending);
}

static struct irq_chip zeus_irq_chip = {
      .name       = "ISA",
      .irq_ack    = zeus_ack_irq,
      .irq_mask   = zeus_mask_irq,
      .irq_unmask = zeus_unmask_irq,
};

static void __init zeus_init_irq(void)
{
      int level;
      int isa_irq;

      pxa27x_init_irq();

      /* Peripheral IRQs. It would be nice to move those inside driver
         configuration, but it is not supported at the moment. */
      set_irq_type(gpio_to_irq(ZEUS_AC97_GPIO), IRQ_TYPE_EDGE_RISING);
      set_irq_type(gpio_to_irq(ZEUS_WAKEUP_GPIO),     IRQ_TYPE_EDGE_RISING);
      set_irq_type(gpio_to_irq(ZEUS_PTT_GPIO),  IRQ_TYPE_EDGE_RISING);
      set_irq_type(gpio_to_irq(ZEUS_EXTGPIO_GPIO),    IRQ_TYPE_EDGE_FALLING);
      set_irq_type(gpio_to_irq(ZEUS_CAN_GPIO),  IRQ_TYPE_EDGE_FALLING);

      /* Setup ISA IRQs */
      for (level = 0; level < ARRAY_SIZE(zeus_isa_irqs); level++) {
            isa_irq = zeus_bit_to_irq(level);
            set_irq_chip(isa_irq, &zeus_irq_chip);
            set_irq_handler(isa_irq, handle_edge_irq);
            set_irq_flags(isa_irq, IRQF_VALID | IRQF_PROBE);
      }

      set_irq_type(gpio_to_irq(ZEUS_ISA_GPIO), IRQ_TYPE_EDGE_RISING);
      set_irq_chained_handler(gpio_to_irq(ZEUS_ISA_GPIO), zeus_irq_handler);
}


/*
 * Platform devices
 */

/* Flash */
static struct resource zeus_mtd_resources[] = {
      [0] = { /* NOR Flash (up to 64MB) */
            .start      = ZEUS_FLASH_PHYS,
            .end  = ZEUS_FLASH_PHYS + SZ_64M - 1,
            .flags      = IORESOURCE_MEM,
      },
      [1] = { /* SRAM */
            .start      = ZEUS_SRAM_PHYS,
            .end  = ZEUS_SRAM_PHYS + SZ_512K - 1,
            .flags      = IORESOURCE_MEM,
      },
};

static struct physmap_flash_data zeus_flash_data[] = {
      [0] = {
            .width            = 2,
            .parts            = NULL,
            .nr_parts   = 0,
      },
};

static struct platform_device zeus_mtd_devices[] = {
      [0] = {
            .name       = "physmap-flash",
            .id         = 0,
            .dev        = {
                  .platform_data = &zeus_flash_data[0],
            },
            .resource   = &zeus_mtd_resources[0],
            .num_resources    = 1,
      },
};

/* Serial */
static struct resource zeus_serial_resources[] = {
      {
            .start      = 0x10000000,
            .end  = 0x1000000f,
            .flags      = IORESOURCE_MEM,
      },
      {
            .start      = 0x10800000,
            .end  = 0x1080000f,
            .flags      = IORESOURCE_MEM,
      },
      {
            .start      = 0x11000000,
            .end  = 0x1100000f,
            .flags      = IORESOURCE_MEM,
      },
      {
            .start      = 0x40100000,
            .end  = 0x4010001f,
            .flags      = IORESOURCE_MEM,
      },
      {
            .start      = 0x40200000,
            .end  = 0x4020001f,
            .flags      = IORESOURCE_MEM,
      },
      {
            .start      = 0x40700000,
            .end  = 0x4070001f,
            .flags      = IORESOURCE_MEM,
      },
};

static struct plat_serial8250_port serial_platform_data[] = {
      /* External UARTs */
      /* FIXME: Shared IRQs on COM1-COM4 will not work properly on v1i1 hardware. */
      { /* COM1 */
            .mapbase    = 0x10000000,
            .irq        = gpio_to_irq(ZEUS_UARTA_GPIO),
            .irqflags   = IRQF_TRIGGER_RISING,
            .uartclk    = 14745600,
            .regshift   = 1,
            .flags            = UPF_IOREMAP | UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
            .iotype           = UPIO_MEM,
      },
      { /* COM2 */
            .mapbase    = 0x10800000,
            .irq        = gpio_to_irq(ZEUS_UARTB_GPIO),
            .irqflags   = IRQF_TRIGGER_RISING,
            .uartclk    = 14745600,
            .regshift   = 1,
            .flags            = UPF_IOREMAP | UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
            .iotype           = UPIO_MEM,
      },
      { /* COM3 */
            .mapbase    = 0x11000000,
            .irq        = gpio_to_irq(ZEUS_UARTC_GPIO),
            .irqflags   = IRQF_TRIGGER_RISING,
            .uartclk    = 14745600,
            .regshift   = 1,
            .flags            = UPF_IOREMAP | UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
            .iotype           = UPIO_MEM,
      },
      { /* COM4 */
            .mapbase    = 0x11800000,
            .irq        = gpio_to_irq(ZEUS_UARTD_GPIO),
            .irqflags   = IRQF_TRIGGER_RISING,
            .uartclk    = 14745600,
            .regshift   = 1,
            .flags            = UPF_IOREMAP | UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
            .iotype           = UPIO_MEM,
      },
      /* Internal UARTs */
      { /* FFUART */
            .membase    = (void *)&FFUART,
            .mapbase    = __PREG(FFUART),
            .irq        = IRQ_FFUART,
            .uartclk    = 921600 * 16,
            .regshift   = 2,
            .flags            = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
            .iotype           = UPIO_MEM,
      },
      { /* BTUART */
            .membase    = (void *)&BTUART,
            .mapbase    = __PREG(BTUART),
            .irq        = IRQ_BTUART,
            .uartclk    = 921600 * 16,
            .regshift   = 2,
            .flags            = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
            .iotype           = UPIO_MEM,
      },
      { /* STUART */
            .membase    = (void *)&STUART,
            .mapbase    = __PREG(STUART),
            .irq        = IRQ_STUART,
            .uartclk    = 921600 * 16,
            .regshift   = 2,
            .flags            = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
            .iotype           = UPIO_MEM,
      },
      { },
};

static struct platform_device zeus_serial_device = {
      .name = "serial8250",
      .id   = PLAT8250_DEV_PLATFORM,
      .dev  = {
            .platform_data = serial_platform_data,
      },
      .num_resources    = ARRAY_SIZE(zeus_serial_resources),
      .resource   = zeus_serial_resources,
};

/* Ethernet */
static struct resource zeus_dm9k0_resource[] = {
      [0] = {
            .start = ZEUS_ETH0_PHYS,
            .end   = ZEUS_ETH0_PHYS + 1,
            .flags = IORESOURCE_MEM
      },
      [1] = {
            .start = ZEUS_ETH0_PHYS + 2,
            .end   = ZEUS_ETH0_PHYS + 3,
            .flags = IORESOURCE_MEM
      },
      [2] = {
            .start = gpio_to_irq(ZEUS_ETH0_GPIO),
            .end   = gpio_to_irq(ZEUS_ETH0_GPIO),
            .flags = IORESOURCE_IRQ | IORESOURCE_IRQ_LOWEDGE,
      },
};

static struct resource zeus_dm9k1_resource[] = {
      [0] = {
            .start = ZEUS_ETH1_PHYS,
            .end   = ZEUS_ETH1_PHYS + 1,
            .flags = IORESOURCE_MEM
      },
      [1] = {
            .start = ZEUS_ETH1_PHYS + 2,
            .end   = ZEUS_ETH1_PHYS + 3,
            .flags = IORESOURCE_MEM,
      },
      [2] = {
            .start = gpio_to_irq(ZEUS_ETH1_GPIO),
            .end   = gpio_to_irq(ZEUS_ETH1_GPIO),
            .flags = IORESOURCE_IRQ | IORESOURCE_IRQ_LOWEDGE,
      },
};

static struct dm9000_plat_data zeus_dm9k_platdata = {
      .flags            = DM9000_PLATF_16BITONLY,
};

static struct platform_device zeus_dm9k0_device = {
      .name       = "dm9000",
      .id         = 0,
      .num_resources    = ARRAY_SIZE(zeus_dm9k0_resource),
      .resource   = zeus_dm9k0_resource,
      .dev        = {
            .platform_data = &zeus_dm9k_platdata,
      }
};

static struct platform_device zeus_dm9k1_device = {
      .name       = "dm9000",
      .id         = 1,
      .num_resources    = ARRAY_SIZE(zeus_dm9k1_resource),
      .resource   = zeus_dm9k1_resource,
      .dev        = {
            .platform_data = &zeus_dm9k_platdata,
      }
};

/* External SRAM */
static struct resource zeus_sram_resource = {
      .start            = ZEUS_SRAM_PHYS,
      .end        = ZEUS_SRAM_PHYS + ZEUS_SRAM_SIZE * 2 - 1,
      .flags            = IORESOURCE_MEM,
};

static struct platform_device zeus_sram_device = {
      .name       = "pxa2xx-8bit-sram",
      .id         = 0,
      .num_resources    = 1,
      .resource   = &zeus_sram_resource,
};

/* SPI interface on SSP3 */
static struct pxa2xx_spi_master pxa2xx_spi_ssp3_master_info = {
      .num_chipselect = 1,
      .enable_dma     = 1,
};

/* CAN bus on SPI */
static int zeus_mcp2515_setup(struct spi_device *sdev)
{
      int err;

      err = gpio_request(ZEUS_CAN_SHDN_GPIO, "CAN shutdown");
      if (err)
            return err;

      err = gpio_direction_output(ZEUS_CAN_SHDN_GPIO, 1);
      if (err) {
            gpio_free(ZEUS_CAN_SHDN_GPIO);
            return err;
      }

      return 0;
}

static int zeus_mcp2515_transceiver_enable(int enable)
{
      gpio_set_value(ZEUS_CAN_SHDN_GPIO, !enable);
      return 0;
}

static struct mcp251x_platform_data zeus_mcp2515_pdata = {
      .oscillator_frequency   = 16*1000*1000,
      .board_specific_setup   = zeus_mcp2515_setup,
      .power_enable           = zeus_mcp2515_transceiver_enable,
};

static struct spi_board_info zeus_spi_board_info[] = {
      [0] = {
            .modalias   = "mcp2515",
            .platform_data    = &zeus_mcp2515_pdata,
            .irq        = gpio_to_irq(ZEUS_CAN_GPIO),
            .max_speed_hz     = 1*1000*1000,
            .bus_num    = 3,
            .mode       = SPI_MODE_0,
            .chip_select      = 0,
      },
};

/* Leds */
static struct gpio_led zeus_leds[] = {
      [0] = {
            .name        = "zeus:yellow:1",
            .default_trigger = "heartbeat",
            .gpio        = ZEUS_EXT0_GPIO(3),
            .active_low  = 1,
      },
      [1] = {
            .name        = "zeus:yellow:2",
            .default_trigger = "default-on",
            .gpio        = ZEUS_EXT0_GPIO(4),
            .active_low  = 1,
      },
      [2] = {
            .name        = "zeus:yellow:3",
            .default_trigger = "default-on",
            .gpio        = ZEUS_EXT0_GPIO(5),
            .active_low  = 1,
      },
};

static struct gpio_led_platform_data zeus_leds_info = {
      .leds       = zeus_leds,
      .num_leds   = ARRAY_SIZE(zeus_leds),
};

static struct platform_device zeus_leds_device = {
      .name       = "leds-gpio",
      .id         = -1,
      .dev        = {
            .platform_data    = &zeus_leds_info,
      },
};

static void zeus_cf_reset(int state)
{
      u16 cpld_state = __raw_readw(ZEUS_CPLD_CONTROL);

      if (state)
            cpld_state |= ZEUS_CPLD_CONTROL_CF_RST;
      else
            cpld_state &= ~ZEUS_CPLD_CONTROL_CF_RST;

      __raw_writew(cpld_state, ZEUS_CPLD_CONTROL);
}

static struct arcom_pcmcia_pdata zeus_pcmcia_info = {
      .cd_gpio    = ZEUS_CF_CD_GPIO,
      .rdy_gpio   = ZEUS_CF_RDY_GPIO,
      .pwr_gpio   = ZEUS_CF_PWEN_GPIO,
      .reset            = zeus_cf_reset,
};

static struct platform_device zeus_pcmcia_device = {
      .name       = "zeus-pcmcia",
      .id         = -1,
      .dev        = {
            .platform_data    = &zeus_pcmcia_info,
      },
};

static struct resource zeus_max6369_resource = {
      .start            = ZEUS_CPLD_EXTWDOG_PHYS,
      .end        = ZEUS_CPLD_EXTWDOG_PHYS,
      .flags            = IORESOURCE_MEM,
};

struct platform_device zeus_max6369_device = {
      .name       = "max6369_wdt",
      .id         = -1,
      .resource   = &zeus_max6369_resource,
      .num_resources    = 1,
};

static struct platform_device *zeus_devices[] __initdata = {
      &zeus_serial_device,
      &zeus_mtd_devices[0],
      &zeus_dm9k0_device,
      &zeus_dm9k1_device,
      &zeus_sram_device,
      &zeus_leds_device,
      &zeus_pcmcia_device,
      &zeus_max6369_device,
};

/* AC'97 */
static pxa2xx_audio_ops_t zeus_ac97_info = {
      .reset_gpio = 95,
};


/*
 * USB host
 */

static int zeus_ohci_init(struct device *dev)
{
      int err;

      /* Switch on port 2. */
      if ((err = gpio_request(ZEUS_USB2_PWREN_GPIO, "USB2_PWREN"))) {
            dev_err(dev, "Can't request USB2_PWREN\n");
            return err;
      }

      if ((err = gpio_direction_output(ZEUS_USB2_PWREN_GPIO, 1))) {
            gpio_free(ZEUS_USB2_PWREN_GPIO);
            dev_err(dev, "Can't enable USB2_PWREN\n");
            return err;
      }

      /* Port 2 is shared between host and client interface. */
      UP2OCR = UP2OCR_HXOE | UP2OCR_HXS | UP2OCR_DMPDE | UP2OCR_DPPDE;

      return 0;
}

static void zeus_ohci_exit(struct device *dev)
{
      /* Power-off port 2 */
      gpio_direction_output(ZEUS_USB2_PWREN_GPIO, 0);
      gpio_free(ZEUS_USB2_PWREN_GPIO);
}

static struct pxaohci_platform_data zeus_ohci_platform_data = {
      .port_mode  = PMM_NPS_MODE,
      /* Clear Power Control Polarity Low and set Power Sense
       * Polarity Low. Supply power to USB ports. */
      .flags            = ENABLE_PORT_ALL | POWER_SENSE_LOW,
      .init       = zeus_ohci_init,
      .exit       = zeus_ohci_exit,
};

/*
 * Flat Panel
 */

static void zeus_lcd_power(int on, struct fb_var_screeninfo *si)
{
      gpio_set_value(ZEUS_LCD_EN_GPIO, on);
}

static void zeus_backlight_power(int on)
{
      gpio_set_value(ZEUS_BKLEN_GPIO, on);
}

static int zeus_setup_fb_gpios(void)
{
      int err;

      if ((err = gpio_request(ZEUS_LCD_EN_GPIO, "LCD_EN")))
            goto out_err;

      if ((err = gpio_direction_output(ZEUS_LCD_EN_GPIO, 0)))
            goto out_err_lcd;

      if ((err = gpio_request(ZEUS_BKLEN_GPIO, "BKLEN")))
            goto out_err_lcd;

      if ((err = gpio_direction_output(ZEUS_BKLEN_GPIO, 0)))
            goto out_err_bkl;

      return 0;

out_err_bkl:
      gpio_free(ZEUS_BKLEN_GPIO);
out_err_lcd:
      gpio_free(ZEUS_LCD_EN_GPIO);
out_err:
      return err;
}

static struct pxafb_mode_info zeus_fb_mode_info[] = {
      {
            .pixclock       = 39722,

            .xres           = 640,
            .yres           = 480,

            .bpp            = 16,

            .hsync_len      = 63,
            .left_margin    = 16,
            .right_margin   = 81,

            .vsync_len      = 2,
            .upper_margin   = 12,
            .lower_margin   = 31,

            .sync       = 0,
      },
};

static struct pxafb_mach_info zeus_fb_info = {
      .modes                  = zeus_fb_mode_info,
      .num_modes        = 1,
      .lcd_conn         = LCD_COLOR_TFT_16BPP | LCD_PCLK_EDGE_FALL,
      .pxafb_lcd_power  = zeus_lcd_power,
      .pxafb_backlight_power  = zeus_backlight_power,
};

/*
 * MMC/SD Device
 *
 * The card detect interrupt isn't debounced so we delay it by 250ms
 * to give the card a chance to fully insert/eject.
 */

static struct pxamci_platform_data zeus_mci_platform_data = {
      .ocr_mask         = MMC_VDD_32_33|MMC_VDD_33_34,
      .detect_delay_ms  = 250,
      .gpio_card_detect       = ZEUS_MMC_CD_GPIO,
      .gpio_card_ro           = ZEUS_MMC_WP_GPIO,
      .gpio_card_ro_invert    = 1,
      .gpio_power             = -1
};

/*
 * USB Device Controller
 */
static void zeus_udc_command(int cmd)
{
      switch (cmd) {
      case PXA2XX_UDC_CMD_DISCONNECT:
            pr_info("zeus: disconnecting USB client\n");
            UP2OCR = UP2OCR_HXOE | UP2OCR_HXS | UP2OCR_DMPDE | UP2OCR_DPPDE;
            break;

      case PXA2XX_UDC_CMD_CONNECT:
            pr_info("zeus: connecting USB client\n");
            UP2OCR = UP2OCR_HXOE | UP2OCR_DPPUE;
            break;
      }
}

static struct pxa2xx_udc_mach_info zeus_udc_info = {
      .udc_command = zeus_udc_command,
};

#ifdef CONFIG_PM
static void zeus_power_off(void)
{
      local_irq_disable();
      pxa27x_cpu_suspend(PWRMODE_DEEPSLEEP);
}
#else
#define zeus_power_off   NULL
#endif

#ifdef CONFIG_APM_EMULATION
static void zeus_get_power_status(struct apm_power_info *info)
{
      /* Power supply is always present */
      info->ac_line_status    = APM_AC_ONLINE;
      info->battery_status    = APM_BATTERY_STATUS_NOT_PRESENT;
      info->battery_flag      = APM_BATTERY_FLAG_NOT_PRESENT;
}

static inline void zeus_setup_apm(void)
{
      apm_get_power_status = zeus_get_power_status;
}
#else
static inline void zeus_setup_apm(void)
{
}
#endif

static int zeus_get_pcb_info(struct i2c_client *client, unsigned gpio,
                       unsigned ngpio, void *context)
{
      int i;
      u8 pcb_info = 0;

      for (i = 0; i < 8; i++) {
            int pcb_bit = gpio + i + 8;

            if (gpio_request(pcb_bit, "pcb info")) {
                  dev_err(&client->dev, "Can't request pcb info %d\n", i);
                  continue;
            }

            if (gpio_direction_input(pcb_bit)) {
                  dev_err(&client->dev, "Can't read pcb info %d\n", i);
                  gpio_free(pcb_bit);
                  continue;
            }

            pcb_info |= !!gpio_get_value(pcb_bit) << i;

            gpio_free(pcb_bit);
      }

      dev_info(&client->dev, "Zeus PCB version %d issue %d\n",
             pcb_info >> 4, pcb_info & 0xf);

      return 0;
}

static struct pca953x_platform_data zeus_pca953x_pdata[] = {
      [0] = { .gpio_base      = ZEUS_EXT0_GPIO_BASE, },
      [1] = {
            .gpio_base  = ZEUS_EXT1_GPIO_BASE,
            .setup            = zeus_get_pcb_info,
      },
      [2] = { .gpio_base = ZEUS_USER_GPIO_BASE, },
};

static struct i2c_board_info __initdata zeus_i2c_devices[] = {
      {
            I2C_BOARD_INFO("pca9535",     0x21),
            .platform_data    = &zeus_pca953x_pdata[0],
      },
      {
            I2C_BOARD_INFO("pca9535",     0x22),
            .platform_data    = &zeus_pca953x_pdata[1],
      },
      {
            I2C_BOARD_INFO("pca9535",     0x20),
            .platform_data    = &zeus_pca953x_pdata[2],
            .irq        = gpio_to_irq(ZEUS_EXTGPIO_GPIO),
      },
      { I2C_BOARD_INFO("lm75a",     0x48) },
      { I2C_BOARD_INFO("24c01",     0x50) },
      { I2C_BOARD_INFO("isl1208",   0x6f) },
};

static mfp_cfg_t zeus_pin_config[] __initdata = {
      /* AC97 */
      GPIO28_AC97_BITCLK,
      GPIO29_AC97_SDATA_IN_0,
      GPIO30_AC97_SDATA_OUT,
      GPIO31_AC97_SYNC,

      GPIO15_nCS_1,
      GPIO78_nCS_2,
      GPIO80_nCS_4,
      GPIO33_nCS_5,

      GPIO22_GPIO,
      GPIO32_MMC_CLK,
      GPIO92_MMC_DAT_0,
      GPIO109_MMC_DAT_1,
      GPIO110_MMC_DAT_2,
      GPIO111_MMC_DAT_3,
      GPIO112_MMC_CMD,

      GPIO88_USBH1_PWR,
      GPIO89_USBH1_PEN,
      GPIO119_USBH2_PWR,
      GPIO120_USBH2_PEN,

      GPIO86_LCD_LDD_16,
      GPIO87_LCD_LDD_17,

      GPIO102_GPIO,
      GPIO104_CIF_DD_2,
      GPIO105_CIF_DD_1,

      GPIO81_SSP3_TXD,
      GPIO82_SSP3_RXD,
      GPIO83_SSP3_SFRM,
      GPIO84_SSP3_SCLK,

      GPIO48_nPOE,
      GPIO49_nPWE,
      GPIO50_nPIOR,
      GPIO51_nPIOW,
      GPIO85_nPCE_1,
      GPIO54_nPCE_2,
      GPIO79_PSKTSEL,
      GPIO55_nPREG,
      GPIO56_nPWAIT,
      GPIO57_nIOIS16,
      GPIO36_GPIO,            /* CF CD */
      GPIO97_GPIO,            /* CF PWREN */
      GPIO99_GPIO,            /* CF RDY */
};

/*
 * DM9k MSCx settings:  SRAM, 16 bits
 *                17 cycles delay first access
 *                 5 cycles delay next access
 *                13 cycles recovery time
 *                faster device
 */
#define DM9K_MSC_VALUE        0xe4c9

static void __init zeus_init(void)
{
      u16 dm9000_msc = DM9K_MSC_VALUE;
      u32 msc0, msc1;

      system_rev = __raw_readw(ZEUS_CPLD_VERSION);
      pr_info("Zeus CPLD V%dI%d\n", (system_rev & 0xf0) >> 4, (system_rev & 0x0f));

      /* Fix timings for dm9000s (CS1/CS2)*/
      msc0 = (__raw_readl(MSC0) & 0x0000ffff) | (dm9000_msc << 16);
      msc1 = (__raw_readl(MSC1) & 0xffff0000) | dm9000_msc;
      __raw_writel(msc0, MSC0);
      __raw_writel(msc1, MSC1);

      pm_power_off = zeus_power_off;
      zeus_setup_apm();

      pxa2xx_mfp_config(ARRAY_AND_SIZE(zeus_pin_config));

      platform_add_devices(zeus_devices, ARRAY_SIZE(zeus_devices));

      pxa_set_ohci_info(&zeus_ohci_platform_data);

      if (zeus_setup_fb_gpios())
            pr_err("Failed to setup fb gpios\n");
      else
            set_pxa_fb_info(&zeus_fb_info);

      pxa_set_mci_info(&zeus_mci_platform_data);
      pxa_set_udc_info(&zeus_udc_info);
      pxa_set_ac97_info(&zeus_ac97_info);
      pxa_set_i2c_info(NULL);
      i2c_register_board_info(0, ARRAY_AND_SIZE(zeus_i2c_devices));
      pxa2xx_set_spi_info(3, &pxa2xx_spi_ssp3_master_info);
      spi_register_board_info(zeus_spi_board_info, ARRAY_SIZE(zeus_spi_board_info));
}

static struct map_desc zeus_io_desc[] __initdata = {
      {
            .virtual = ZEUS_CPLD_VERSION,
            .pfn     = __phys_to_pfn(ZEUS_CPLD_VERSION_PHYS),
            .length  = 0x1000,
            .type    = MT_DEVICE,
      },
      {
            .virtual = ZEUS_CPLD_ISA_IRQ,
            .pfn     = __phys_to_pfn(ZEUS_CPLD_ISA_IRQ_PHYS),
            .length  = 0x1000,
            .type    = MT_DEVICE,
      },
      {
            .virtual = ZEUS_CPLD_CONTROL,
            .pfn     = __phys_to_pfn(ZEUS_CPLD_CONTROL_PHYS),
            .length  = 0x1000,
            .type    = MT_DEVICE,
      },
      {
            .virtual = ZEUS_PC104IO,
            .pfn     = __phys_to_pfn(ZEUS_PC104IO_PHYS),
            .length  = 0x00800000,
            .type    = MT_DEVICE,
      },
};

static void __init zeus_map_io(void)
{
      pxa27x_map_io();

      iotable_init(zeus_io_desc, ARRAY_SIZE(zeus_io_desc));

      /* Clear PSPR to ensure a full restart on wake-up. */
      PMCR = PSPR = 0;

      /* enable internal 32.768Khz oscillator (ignore OSCC_OOK) */
      OSCC |= OSCC_OON;

      /* Some clock cycles later (from OSCC_ON), programme PCFR (OPDE...).
       * float chip selects and PCMCIA */
      PCFR = PCFR_OPDE | PCFR_DC_EN | PCFR_FS | PCFR_FP;
}

MACHINE_START(ARCOM_ZEUS, "Arcom/Eurotech ZEUS")
      /* Maintainer: Marc Zyngier <maz@misterjones.org> */
      .boot_params      = 0xa0000100,
      .map_io           = zeus_map_io,
      .nr_irqs    = ZEUS_NR_IRQS,
      .init_irq   = zeus_init_irq,
      .timer            = &pxa_timer,
      .init_machine     = zeus_init,
MACHINE_END


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