text: /*
   * IR port driver for the Cirrus Logic EP7211 processor.
   *
   * Copyright 2001, Blue Mug Inc.  All rights reserved.
   * Copyright 2007, Samuel Ortiz <samuel@sortiz.org>
   */
  #include <linux/module.h>
  #include <linux/delay.h>
  #include <linux/tty.h>
  #include <linux/init.h>
  #include <linux/spinlock.h>
  
  #include <net/irda/irda.h>
  #include <net/irda/irda_device.h>
  
  #include <asm/io.h>
  #include <mach/hardware.h>
  
  #include "sir-dev.h"
  
  #define MIN_DELAY 25      /* 15 us, but wait a little more to be sure */
  #define MAX_DELAY 10000   /* 1 ms */
  
  static int ep7211_open(struct sir_dev *dev);
  static int ep7211_close(struct sir_dev *dev);
  static int ep7211_change_speed(struct sir_dev *dev, unsigned speed);
  static int ep7211_reset(struct sir_dev *dev);
  
  static struct dongle_driver ep7211 = {
  	.owner		= THIS_MODULE,
  	.driver_name	= "EP7211 IR driver",
  	.type		= IRDA_EP7211_DONGLE,
  	.open		= ep7211_open,
  	.close		= ep7211_close,
  	.reset		= ep7211_reset,
  	.set_speed	= ep7211_change_speed,
  };
  
  static int __init ep7211_sir_init(void)
  {
  	return irda_register_dongle(&ep7211);
  }
  
  static void __exit ep7211_sir_cleanup(void)
  {
  	irda_unregister_dongle(&ep7211);
  }
  
  static int ep7211_open(struct sir_dev *dev)
  {
  	unsigned int syscon;
  
  	/* Turn on the SIR encoder. */
  	syscon = clps_readl(SYSCON1);
  	syscon |= SYSCON1_SIREN;
  	clps_writel(syscon, SYSCON1);
  
  	return 0;
  }
  
  static int ep7211_close(struct sir_dev *dev)
  {
  	unsigned int syscon;
  
  	/* Turn off the SIR encoder. */
  	syscon = clps_readl(SYSCON1);
  	syscon &= ~SYSCON1_SIREN;
  	clps_writel(syscon, SYSCON1);
  
  	return 0;
  }
  
  static int ep7211_change_speed(struct sir_dev *dev, unsigned speed)
  {
  	return 0;
  }
  
  static int ep7211_reset(struct sir_dev *dev)
  {
  	return 0;
  }
  
  MODULE_AUTHOR("Samuel Ortiz <samuel@sortiz.org>");
  MODULE_DESCRIPTION("EP7211 IR dongle driver");
  MODULE_LICENSE("GPL");
  MODULE_ALIAS("irda-dongle-13"); /* IRDA_EP7211_DONGLE */
  
  module_init(ep7211_sir_init);
  module_exit(ep7211_sir_cleanup);
  