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simpad.c

/*
 * linux/arch/arm/mach-sa1100/simpad.c
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/tty.h>
#include <linux/proc_fs.h>
#include <linux/string.h> 
#include <linux/pm.h>
#include <linux/platform_device.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>

#include <asm/irq.h>
#include <asm/hardware.h>
#include <asm/setup.h>

#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <asm/mach/flash.h>
#include <asm/mach/map.h>
#include <asm/mach/serial_sa1100.h>
#include <asm/arch/mcp.h>
#include <asm/arch/simpad.h>

#include <linux/serial_core.h>
#include <linux/ioport.h>
#include <asm/io.h>

#include "generic.h"

long cs3_shadow;

long get_cs3_shadow(void)
{
      return cs3_shadow;
}

void set_cs3(long value)
{
      *(CS3BUSTYPE *)(CS3_BASE) = cs3_shadow = value;
}

void set_cs3_bit(int value)
{
      cs3_shadow |= value;
      *(CS3BUSTYPE *)(CS3_BASE) = cs3_shadow;
}

void clear_cs3_bit(int value)
{
      cs3_shadow &= ~value;
      *(CS3BUSTYPE *)(CS3_BASE) = cs3_shadow;
}

EXPORT_SYMBOL(set_cs3_bit);
EXPORT_SYMBOL(clear_cs3_bit);

static struct map_desc simpad_io_desc[] __initdata = {
      {     /* MQ200 */
            .virtual    =  0xf2800000,
            .pfn        = __phys_to_pfn(0x4b800000),
            .length           = 0x00800000,
            .type       = MT_DEVICE
      }, {  /* Paules CS3, write only */
            .virtual    =  0xf1000000,
            .pfn        = __phys_to_pfn(0x18000000),
            .length           = 0x00100000,
            .type       = MT_DEVICE
      },
};


static void simpad_uart_pm(struct uart_port *port, u_int state, u_int oldstate)
{
      if (port->mapbase == (u_int)&Ser1UTCR0) {
            if (state)
            {
                  clear_cs3_bit(RS232_ON);
                  clear_cs3_bit(DECT_POWER_ON);
            }else
            {
                  set_cs3_bit(RS232_ON);
                  set_cs3_bit(DECT_POWER_ON);
            }
      }
}

static struct sa1100_port_fns simpad_port_fns __initdata = {
      .pm      = simpad_uart_pm,
};


static struct mtd_partition simpad_partitions[] = {
      {
            .name       = "SIMpad boot firmware",
            .size       = 0x00080000,
            .offset     = 0,
            .mask_flags = MTD_WRITEABLE,
      }, {
            .name       = "SIMpad kernel",
            .size       = 0x0010000,
            .offset     = MTDPART_OFS_APPEND,
      }, {
            .name       = "SIMpad root jffs2",
            .size       = MTDPART_SIZ_FULL,
            .offset     = MTDPART_OFS_APPEND,
      }
};

static struct flash_platform_data simpad_flash_data = {
      .map_name    = "cfi_probe",
      .parts       = simpad_partitions,
      .nr_parts    = ARRAY_SIZE(simpad_partitions),
};


static struct resource simpad_flash_resources [] = {
      {
            .start     = SA1100_CS0_PHYS,
            .end       = SA1100_CS0_PHYS + SZ_16M -1,
            .flags     = IORESOURCE_MEM,
      }, {
            .start     = SA1100_CS1_PHYS,
            .end       = SA1100_CS1_PHYS + SZ_16M -1,
            .flags     = IORESOURCE_MEM,
      }
};

static struct mcp_plat_data simpad_mcp_data = {
      .mccr0            = MCCR0_ADM,
      .sclk_rate  = 11981000,
};



static void __init simpad_map_io(void)
{
      sa1100_map_io();

      iotable_init(simpad_io_desc, ARRAY_SIZE(simpad_io_desc));

      set_cs3_bit (EN1 | EN0 | LED2_ON | DISPLAY_ON | RS232_ON |
                  ENABLE_5V | RESET_SIMCARD | DECT_POWER_ON);


        sa1100_register_uart_fns(&simpad_port_fns);
      sa1100_register_uart(0, 3);  /* serial interface */
      sa1100_register_uart(1, 1);  /* DECT             */

      // Reassign UART 1 pins
      GAFR |= GPIO_UART_TXD | GPIO_UART_RXD;
      GPDR |= GPIO_UART_TXD | GPIO_LDD13 | GPIO_LDD15;
      GPDR &= ~GPIO_UART_RXD;
      PPAR |= PPAR_UPR;

      /*
       * Set up registers for sleep mode.
       */


      PWER = PWER_GPIO0| PWER_RTC;
      PGSR = 0x818;
      PCFR = 0;
      PSDR = 0;

      sa11x0_set_flash_data(&simpad_flash_data, simpad_flash_resources,
                        ARRAY_SIZE(simpad_flash_resources));
      sa11x0_set_mcp_data(&simpad_mcp_data);
}

static void simpad_power_off(void)
{
      local_irq_disable(); // was cli
      set_cs3(0x800);        /* only SD_MEDIAQ */

      /* disable internal oscillator, float CS lines */
      PCFR = (PCFR_OPDE | PCFR_FP | PCFR_FS);
      /* enable wake-up on GPIO0 (Assabet...) */
      PWER = GFER = GRER = 1;
      /*
       * set scratchpad to zero, just in case it is used as a
       * restart address by the bootloader.
       */
      PSPR = 0;
      PGSR = 0;
      /* enter sleep mode */
      PMCR = PMCR_SF;
      while(1);

      local_irq_enable(); /* we won't ever call it */


}


/*
 * MediaQ Video Device
 */
static struct platform_device simpad_mq200fb = {
      .name = "simpad-mq200",
      .id   = 0,
};

static struct platform_device *devices[] __initdata = {
      &simpad_mq200fb
};



static int __init simpad_init(void)
{
      int ret;

      pm_power_off = simpad_power_off;

      ret = platform_add_devices(devices, ARRAY_SIZE(devices));
      if(ret)
            printk(KERN_WARNING "simpad: Unable to register mq200 framebuffer device");

      return 0;
}

arch_initcall(simpad_init);


MACHINE_START(SIMPAD, "Simpad")
      /* Maintainer: Holger Freyther */
      .phys_io    = 0x80000000,
      .io_pg_offst      = ((0xf8000000) >> 18) & 0xfffc,
      .boot_params      = 0xc0000100,
      .map_io           = simpad_map_io,
      .init_irq   = sa1100_init_irq,
      .timer            = &sa1100_timer,
MACHINE_END

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