text: /*
   * linux/arch/arm/mach-sa1100/pfs168.c
   */
  #include <linux/config.h>
  #include <linux/init.h>
  #include <linux/kernel.h>
  #include <linux/tty.h>
  #include <linux/errno.h>
  
  #include <asm/hardware.h>
  #include <asm/setup.h>
  
  #include <asm/mach/arch.h>
  #include <asm/mach/map.h>
  #include <asm/mach/serial_sa1100.h>
  
  #include "generic.h"
  #include "sa1111.h"
  
  
  static int __init pfs168_init(void)
  {
  	int ret;
  
  	if (!machine_is_pfs168())
  		return -ENODEV;
  
  	/*
  	 * Ensure that the memory bus request/grant signals are setup,
  	 * and the grant is held in its inactive state
  	 */
  	sa1110_mb_disable();
  
  	/*
  	 * Probe for SA1111.
  	 */
  	ret = sa1111_probe(PFS168_SA1111_BASE);
  	if (ret < 0)
  		return ret;
  
  	/*
  	 * We found it.  Wake the chip up.
  	 */
  	sa1111_wake();
  
  	/*
  	 * The SDRAM configuration of the SA1110 and the SA1111 must
  	 * match.  This is very important to ensure that SA1111 accesses
  	 * don't corrupt the SDRAM.  Note that this ungates the SA1111's
  	 * MBGNT signal, so we must have called sa1110_mb_disable()
  	 * beforehand.
  	 */
  	sa1111_configure_smc(1,
  			     FExtr(MDCNFG, MDCNFG_SA1110_DRAC0),
  			     FExtr(MDCNFG, MDCNFG_SA1110_TDL0));
  
  	/*
  	 * We only need to turn on DCLK whenever we want to use the
  	 * DMA.  It can otherwise be held firmly in the off position.
  	 */
  	SKPCR |= SKPCR_DCLKEN;
  
  	/*
  	 * Enable the SA1110 memory bus request and grant signals.
  	 */
  	sa1110_mb_enable();
  
  	sa1111_init_irq(IRQ_GPIO25);	/* SA1111 IRQ on GPIO 25 */
  
  	return 0;
  }
  
  __initcall(pfs168_init);
  
  
  static void __init pfs168_init_irq(void)
  {
  	sa1100_init_irq();
  
  	/*
  	 * Need to register these as rising edge interrupts
  	 * for standard 16550 serial driver support.
  	 */
  	set_GPIO_IRQ_edge(GPIO_GPIO(19), GPIO_RISING_EDGE);
  	set_GPIO_IRQ_edge(GPIO_GPIO(20), GPIO_RISING_EDGE);
  	set_GPIO_IRQ_edge(GPIO_GPIO(25), GPIO_RISING_EDGE);
  	set_GPIO_IRQ_edge(GPIO_UCB1300_IRQ, GPIO_RISING_EDGE);
  }
  
  
  static void __init
  fixup_pfs168(struct machine_desc *desc, struct param_struct *params,
  	     char **cmdline, struct meminfo *mi)
  {
  	SET_BANK( 0, 0xc0000000, 16*1024*1024 );
  	mi->nr_banks = 1;
  
  	ROOT_DEV = MKDEV(RAMDISK_MAJOR,0);
  	setup_ramdisk( 1, 0, 0, 8192 );
  	setup_initrd( 0xc0800000, 3*1024*1024 );
  }
  
  static struct map_desc pfs168_io_desc[] __initdata = {
   /* virtual     physical    length      domain     r  w  c  b */
    { 0xe8000000, 0x00000000, 0x02000000, DOMAIN_IO, 0, 1, 0, 0 }, /* Flash bank 0 */
    { 0xf0000000, 0x10000000, 0x00001000, DOMAIN_IO, 0, 1, 0, 0 }, /* 16C752 DUART port A (COM5) */
    { 0xf0001000, 0x10800000, 0x00001000, DOMAIN_IO, 0, 1, 0, 0 }, /* 16C752 DUART port B (COM6) */
    { 0xf0002000, 0x11000000, 0x00001000, DOMAIN_IO, 0, 1, 0, 0 }, /* COM1 RTS control (SYSC1RTS) */
    { 0xf0003000, 0x11400000, 0x00001000, DOMAIN_IO, 0, 1, 0, 0 }, /* Status LED control (SYSLED) */
    { 0xf0004000, 0x11800000, 0x00001000, DOMAIN_IO, 0, 1, 0, 0 }, /* DTMF code read (SYSDTMF) */
    { 0xf0005000, 0x11c00000, 0x00001000, DOMAIN_IO, 0, 1, 0, 0 }, /* LCD configure, enable (SYSLCDDE) */
    { 0xf0006000, 0x12000000, 0x00001000, DOMAIN_IO, 0, 1, 0, 0 }, /* COM1 DSR and motion sense (SYSC1DSR) */
    { 0xf0007000, 0x12800000, 0x00001000, DOMAIN_IO, 0, 1, 0, 0 }, /* COM3 xmit enable (SYSC3TEN) */
    { 0xf0008000, 0x13000000, 0x00001000, DOMAIN_IO, 0, 1, 0, 0 }, /* Control register A (SYSCTLA) */
    { 0xf0009000, 0x13800000, 0x00001000, DOMAIN_IO, 0, 1, 0, 0 }, /* Control register B (SYSCTLB) */
    { 0xf000a000, 0x18000000, 0x00001000, DOMAIN_IO, 0, 1, 0, 0 }, /* SMC91C96 */
    { 0xf2800000, 0x4b800000, 0x00800000, DOMAIN_IO, 0, 1, 0, 0 }, /* MQ200 */
    { 0xf4000000, 0x40000000, 0x00100000, DOMAIN_IO, 0, 1, 0, 0 }, /* SA-1111 */
    LAST_DESC
  };
  
  static void __init pfs168_map_io(void)
  {
  	sa1100_map_io();
  	iotable_init(pfs168_io_desc);
  
  	sa1100_register_uart(0, 3);
  	sa1100_register_uart(1, 1);
  }
  
  MACHINE_START(PFS168, "Tulsa")
  	BOOT_MEM(0xc0000000, 0x80000000, 0xf8000000)
  #if defined(CONFIG_PFS168_CMDLINE)
  	BOOT_PARAMS(0xc0000100)
  #endif
  	FIXUP(fixup_pfs168)
  	MAPIO(pfs168_map_io)
  	INITIRQ(pfs168_init_irq)
  MACHINE_END
  