tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * IR port driver for the Cirrus Logic EP7211 processor.
3 *
4 * Copyright 2001, Blue Mug Inc. All rights reserved.
5 */
6
7#include <linux/module.h>
8#include <linux/delay.h>
9#include <linux/tty.h>
10#include <linux/init.h>
11
12#include <net/irda/irda.h>
13#include <net/irda/irda_device.h>
14
15#include <asm/io.h>
16#include <asm/hardware.h>
17
18#define MIN_DELAY 25 /* 15 us, but wait a little more to be sure */
19#define MAX_DELAY 10000 /* 1 ms */
20
21static void ep7211_ir_open(dongle_t *self, struct qos_info *qos);
22static void ep7211_ir_close(dongle_t *self);
23static int ep7211_ir_change_speed(struct irda_task *task);
24static int ep7211_ir_reset(struct irda_task *task);
25
26static struct dongle_reg dongle = {
27 .type = IRDA_EP7211_IR,
28 .open = ep7211_ir_open,
29 .close = ep7211_ir_close,
30 .reset = ep7211_ir_reset,
31 .change_speed = ep7211_ir_change_speed,
32 .owner = THIS_MODULE,
33};
34
35static void ep7211_ir_open(dongle_t *self, struct qos_info *qos)
36{
37 unsigned int syscon1, flags;
38
39 save_flags(flags); cli();
40
41 /* Turn on the SIR encoder. */
42 syscon1 = clps_readl(SYSCON1);
43 syscon1 |= SYSCON1_SIREN;
44 clps_writel(syscon1, SYSCON1);
45
46 /* XXX: We should disable modem status interrupts on the first
47 UART (interrupt #14). */
48
49 restore_flags(flags);
50}
51
52static void ep7211_ir_close(dongle_t *self)
53{
54 unsigned int syscon1, flags;
55
56 save_flags(flags); cli();
57
58 /* Turn off the SIR encoder. */
59 syscon1 = clps_readl(SYSCON1);
60 syscon1 &= ~SYSCON1_SIREN;
61 clps_writel(syscon1, SYSCON1);
62
63 /* XXX: If we've disabled the modem status interrupts, we should
64 reset them back to their original state. */
65
66 restore_flags(flags);
67}
68
69/*
70 * Function ep7211_ir_change_speed (task)
71 *
72 * Change speed of the EP7211 I/R port. We don't really have to do anything
73 * for the EP7211 as long as the rate is being changed at the serial port
74 * level.
75 */
76static int ep7211_ir_change_speed(struct irda_task *task)
77{
78 irda_task_next_state(task, IRDA_TASK_DONE);
79 return 0;
80}
81
82/*
83 * Function ep7211_ir_reset (task)
84 *
85 * Reset the EP7211 I/R. We don't really have to do anything.
86 *
87 */
88static int ep7211_ir_reset(struct irda_task *task)
89{
90 irda_task_next_state(task, IRDA_TASK_DONE);
91 return 0;
92}
93
94/*
95 * Function ep7211_ir_init(void)
96 *
97 * Initialize EP7211 I/R module
98 *
99 */
100static int __init ep7211_ir_init(void)
101{
102 return irda_device_register_dongle(&dongle);
103}
104
105/*
106 * Function ep7211_ir_cleanup(void)
107 *
108 * Cleanup EP7211 I/R module
109 *
110 */
111static void __exit ep7211_ir_cleanup(void)
112{
113 irda_device_unregister_dongle(&dongle);
114}
115
116MODULE_AUTHOR("Jon McClintock <jonm@bluemug.com>");
117MODULE_DESCRIPTION("EP7211 I/R driver");
118MODULE_LICENSE("GPL");
119MODULE_ALIAS("irda-dongle-8"); /* IRDA_EP7211_IR */
120
121module_init(ep7211_ir_init);
122module_exit(ep7211_ir_cleanup);