Commit | Line | Data |
---|---|---|
1da177e4 LT |
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> | |
03488826 | 11 | #include <linux/spinlock.h> |
1da177e4 LT |
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 | #define MIN_DELAY 25 /* 15 us, but wait a little more to be sure */ | |
20 | #define MAX_DELAY 10000 /* 1 ms */ | |
21 | ||
22 | static void ep7211_ir_open(dongle_t *self, struct qos_info *qos); | |
23 | static void ep7211_ir_close(dongle_t *self); | |
24 | static int ep7211_ir_change_speed(struct irda_task *task); | |
25 | static int ep7211_ir_reset(struct irda_task *task); | |
26 | ||
03488826 D |
27 | static DEFINE_SPINLOCK(ep7211_lock); |
28 | ||
1da177e4 LT |
29 | static struct dongle_reg dongle = { |
30 | .type = IRDA_EP7211_IR, | |
31 | .open = ep7211_ir_open, | |
32 | .close = ep7211_ir_close, | |
33 | .reset = ep7211_ir_reset, | |
34 | .change_speed = ep7211_ir_change_speed, | |
35 | .owner = THIS_MODULE, | |
36 | }; | |
37 | ||
38 | static void ep7211_ir_open(dongle_t *self, struct qos_info *qos) | |
39 | { | |
40 | unsigned int syscon1, flags; | |
41 | ||
03488826 | 42 | spin_lock_irqsave(&ep7211_lock, flags); |
1da177e4 LT |
43 | |
44 | /* Turn on the SIR encoder. */ | |
45 | syscon1 = clps_readl(SYSCON1); | |
46 | syscon1 |= SYSCON1_SIREN; | |
47 | clps_writel(syscon1, SYSCON1); | |
48 | ||
49 | /* XXX: We should disable modem status interrupts on the first | |
50 | UART (interrupt #14). */ | |
51 | ||
03488826 | 52 | spin_unlock_irqrestore(&ep7211_lock, flags); |
1da177e4 LT |
53 | } |
54 | ||
55 | static void ep7211_ir_close(dongle_t *self) | |
56 | { | |
57 | unsigned int syscon1, flags; | |
58 | ||
03488826 | 59 | spin_lock_irqsave(&ep7211_lock, flags); |
1da177e4 LT |
60 | |
61 | /* Turn off the SIR encoder. */ | |
62 | syscon1 = clps_readl(SYSCON1); | |
63 | syscon1 &= ~SYSCON1_SIREN; | |
64 | clps_writel(syscon1, SYSCON1); | |
65 | ||
66 | /* XXX: If we've disabled the modem status interrupts, we should | |
67 | reset them back to their original state. */ | |
68 | ||
03488826 | 69 | spin_unlock_irqrestore(&ep7211_lock, flags); |
1da177e4 LT |
70 | } |
71 | ||
72 | /* | |
73 | * Function ep7211_ir_change_speed (task) | |
74 | * | |
75 | * Change speed of the EP7211 I/R port. We don't really have to do anything | |
76 | * for the EP7211 as long as the rate is being changed at the serial port | |
77 | * level. | |
78 | */ | |
79 | static int ep7211_ir_change_speed(struct irda_task *task) | |
80 | { | |
81 | irda_task_next_state(task, IRDA_TASK_DONE); | |
82 | return 0; | |
83 | } | |
84 | ||
85 | /* | |
86 | * Function ep7211_ir_reset (task) | |
87 | * | |
88 | * Reset the EP7211 I/R. We don't really have to do anything. | |
89 | * | |
90 | */ | |
91 | static int ep7211_ir_reset(struct irda_task *task) | |
92 | { | |
93 | irda_task_next_state(task, IRDA_TASK_DONE); | |
94 | return 0; | |
95 | } | |
96 | ||
97 | /* | |
98 | * Function ep7211_ir_init(void) | |
99 | * | |
100 | * Initialize EP7211 I/R module | |
101 | * | |
102 | */ | |
103 | static int __init ep7211_ir_init(void) | |
104 | { | |
105 | return irda_device_register_dongle(&dongle); | |
106 | } | |
107 | ||
108 | /* | |
109 | * Function ep7211_ir_cleanup(void) | |
110 | * | |
111 | * Cleanup EP7211 I/R module | |
112 | * | |
113 | */ | |
114 | static void __exit ep7211_ir_cleanup(void) | |
115 | { | |
116 | irda_device_unregister_dongle(&dongle); | |
117 | } | |
118 | ||
119 | MODULE_AUTHOR("Jon McClintock <jonm@bluemug.com>"); | |
120 | MODULE_DESCRIPTION("EP7211 I/R driver"); | |
121 | MODULE_LICENSE("GPL"); | |
122 | MODULE_ALIAS("irda-dongle-8"); /* IRDA_EP7211_IR */ | |
123 | ||
124 | module_init(ep7211_ir_init); | |
125 | module_exit(ep7211_ir_cleanup); |