drivers/net/irda/ep7211-sir.c

   1 /*
   2  * IR port driver for the Cirrus Logic EP7211 processor.
   3  *
   4  * Copyright 2001, Blue Mug Inc.  All rights reserved.
   5  * Copyright 2007, Samuel Ortiz <samuel@sortiz.org>
   6  */
   7 #include <linux/module.h>
   8 #include <linux/delay.h>
   9 #include <linux/tty.h>
  10 #include <linux/init.h>
  11 #include <linux/spinlock.h>
  12
  13 #include <net/irda/irda.h>
  14 #include <net/irda/irda_device.h>
  15
  16 #include <asm/io.h>
  17 #include <asm/hardware.h>
  18
  19 #include "sir-dev.h"
  20
  21 #define MIN_DELAY 25      /* 15 us, but wait a little more to be sure */
  22 #define MAX_DELAY 10000   /* 1 ms */
  23
  24 static int ep7211_open(struct sir_dev *dev);
  25 static int ep7211_close(struct sir_dev *dev);
  26 static int ep7211_change_speed(struct sir_dev *dev, unsigned speed);
  27 static int ep7211_reset(struct sir_dev *dev);
  28
  29 static struct dongle_driver ep7211 = {
  30         .owner          = THIS_MODULE,
  31         .driver_name    = "EP7211 IR driver",
  32         .type           = IRDA_EP7211_DONGLE,
  33         .open           = ep7211_open,
  34         .close          = ep7211_close,
  35         .reset          = ep7211_reset,
  36         .set_speed      = ep7211_change_speed,
  37 };
  38
  39 static int __init ep7211_sir_init(void)
  40 {
  41         return irda_register_dongle(&ep7211);
  42 }
  43
  44 static void __exit ep7211_sir_cleanup(void)
  45 {
  46         irda_unregister_dongle(&ep7211);
  47 }
  48
  49 static int ep7211_open(struct sir_dev *dev)
  50 {
  51         unsigned int syscon;
  52
  53         /* Turn on the SIR encoder. */
  54         syscon = clps_readl(SYSCON1);
  55         syscon |= SYSCON1_SIREN;
  56         clps_writel(syscon, SYSCON1);
  57
  58         return 0;
  59 }
  60
  61 static int ep7211_close(struct sir_dev *dev)
  62 {
  63         unsigned int syscon;
  64
  65         /* Turn off the SIR encoder. */
  66         syscon = clps_readl(SYSCON1);
  67         syscon &= ~SYSCON1_SIREN;
  68         clps_writel(syscon, SYSCON1);
  69
  70         return 0;
  71 }
  72
  73 static int ep7211_change_speed(struct sir_dev *dev, unsigned speed)
  74 {
  75         return 0;
  76 }
  77
  78 static int ep7211_reset(struct sir_dev *dev)
  79 {
  80         return 0;
  81 }
  82
  83 MODULE_AUTHOR("Samuel Ortiz <samuel@sortiz.org>");
  84 MODULE_DESCRIPTION("EP7211 IR dongle driver");
  85 MODULE_LICENSE("GPL");
  86 MODULE_ALIAS("irda-dongle-13"); /* IRDA_EP7211_DONGLE */
  87
  88 module_init(ep7211_sir_init);
  89 module_exit(ep7211_sir_cleanup);