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 <mach/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
ep7211_sir_init(void)39 static int __init ep7211_sir_init(void)
40 {
41 return irda_register_dongle(&ep7211);
42 }
43
ep7211_sir_cleanup(void)44 static void __exit ep7211_sir_cleanup(void)
45 {
46 irda_unregister_dongle(&ep7211);
47 }
48
ep7211_open(struct sir_dev * dev)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
ep7211_close(struct sir_dev * dev)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
ep7211_change_speed(struct sir_dev * dev,unsigned speed)73 static int ep7211_change_speed(struct sir_dev *dev, unsigned speed)
74 {
75 return 0;
76 }
77
ep7211_reset(struct sir_dev * dev)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);
90