2 * IR port driver for the Cirrus Logic EP7211 processor.
4 * Copyright 2001, Blue Mug Inc. All rights reserved.
7 #include <linux/module.h>
8 #include <linux/delay.h>
10 #include <linux/init.h>
12 #include <net/irda/irda.h>
13 #include <net/irda/irda_device.h>
16 #include <asm/hardware.h>
18 #define MIN_DELAY 25 /* 15 us, but wait a little more to be sure */
19 #define MAX_DELAY 10000 /* 1 ms */
21 static void ep7211_ir_open(dongle_t *self, struct qos_info *qos);
22 static void ep7211_ir_close(dongle_t *self);
23 static int ep7211_ir_change_speed(struct irda_task *task);
24 static int ep7211_ir_reset(struct irda_task *task);
26 static 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,
35 static void ep7211_ir_open(dongle_t *self, struct qos_info *qos)
37 unsigned int syscon1, flags;
39 save_flags(flags); cli();
41 /* Turn on the SIR encoder. */
42 syscon1 = clps_readl(SYSCON1);
43 syscon1 |= SYSCON1_SIREN;
44 clps_writel(syscon1, SYSCON1);
46 /* XXX: We should disable modem status interrupts on the first
47 UART (interrupt #14). */
52 static void ep7211_ir_close(dongle_t *self)
54 unsigned int syscon1, flags;
56 save_flags(flags); cli();
58 /* Turn off the SIR encoder. */
59 syscon1 = clps_readl(SYSCON1);
60 syscon1 &= ~SYSCON1_SIREN;
61 clps_writel(syscon1, SYSCON1);
63 /* XXX: If we've disabled the modem status interrupts, we should
64 reset them back to their original state. */
70 * Function ep7211_ir_change_speed (task)
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
76 static int ep7211_ir_change_speed(struct irda_task *task)
78 irda_task_next_state(task, IRDA_TASK_DONE);
83 * Function ep7211_ir_reset (task)
85 * Reset the EP7211 I/R. We don't really have to do anything.
88 static int ep7211_ir_reset(struct irda_task *task)
90 irda_task_next_state(task, IRDA_TASK_DONE);
95 * Function ep7211_ir_init(void)
97 * Initialize EP7211 I/R module
100 static int __init ep7211_ir_init(void)
102 return irda_device_register_dongle(&dongle);
106 * Function ep7211_ir_cleanup(void)
108 * Cleanup EP7211 I/R module
111 static void __exit ep7211_ir_cleanup(void)
113 irda_device_unregister_dongle(&dongle);
116 MODULE_AUTHOR("Jon McClintock <jonm@bluemug.com>");
117 MODULE_DESCRIPTION("EP7211 I/R driver");
118 MODULE_LICENSE("GPL");
119 MODULE_ALIAS("irda-dongle-8"); /* IRDA_EP7211_IR */
121 module_init(ep7211_ir_init);
122 module_exit(ep7211_ir_cleanup);