126 lines
2.8 KiB
C
126 lines
2.8 KiB
C
/*
|
|
* IR port driver for the Cirrus Logic EP7211 processor.
|
|
*
|
|
* Copyright 2001, Blue Mug Inc. All rights reserved.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/tty.h>
|
|
#include <linux/init.h>
|
|
#include <linux/spinlock.h>
|
|
|
|
#include <net/irda/irda.h>
|
|
#include <net/irda/irda_device.h>
|
|
|
|
#include <asm/io.h>
|
|
#include <asm/hardware.h>
|
|
|
|
#define MIN_DELAY 25 /* 15 us, but wait a little more to be sure */
|
|
#define MAX_DELAY 10000 /* 1 ms */
|
|
|
|
static void ep7211_ir_open(dongle_t *self, struct qos_info *qos);
|
|
static void ep7211_ir_close(dongle_t *self);
|
|
static int ep7211_ir_change_speed(struct irda_task *task);
|
|
static int ep7211_ir_reset(struct irda_task *task);
|
|
|
|
static DEFINE_SPINLOCK(ep7211_lock);
|
|
|
|
static struct dongle_reg dongle = {
|
|
.type = IRDA_EP7211_IR,
|
|
.open = ep7211_ir_open,
|
|
.close = ep7211_ir_close,
|
|
.reset = ep7211_ir_reset,
|
|
.change_speed = ep7211_ir_change_speed,
|
|
.owner = THIS_MODULE,
|
|
};
|
|
|
|
static void ep7211_ir_open(dongle_t *self, struct qos_info *qos)
|
|
{
|
|
unsigned int syscon1, flags;
|
|
|
|
spin_lock_irqsave(&ep7211_lock, flags);
|
|
|
|
/* Turn on the SIR encoder. */
|
|
syscon1 = clps_readl(SYSCON1);
|
|
syscon1 |= SYSCON1_SIREN;
|
|
clps_writel(syscon1, SYSCON1);
|
|
|
|
/* XXX: We should disable modem status interrupts on the first
|
|
UART (interrupt #14). */
|
|
|
|
spin_unlock_irqrestore(&ep7211_lock, flags);
|
|
}
|
|
|
|
static void ep7211_ir_close(dongle_t *self)
|
|
{
|
|
unsigned int syscon1, flags;
|
|
|
|
spin_lock_irqsave(&ep7211_lock, flags);
|
|
|
|
/* Turn off the SIR encoder. */
|
|
syscon1 = clps_readl(SYSCON1);
|
|
syscon1 &= ~SYSCON1_SIREN;
|
|
clps_writel(syscon1, SYSCON1);
|
|
|
|
/* XXX: If we've disabled the modem status interrupts, we should
|
|
reset them back to their original state. */
|
|
|
|
spin_unlock_irqrestore(&ep7211_lock, flags);
|
|
}
|
|
|
|
/*
|
|
* Function ep7211_ir_change_speed (task)
|
|
*
|
|
* Change speed of the EP7211 I/R port. We don't really have to do anything
|
|
* for the EP7211 as long as the rate is being changed at the serial port
|
|
* level.
|
|
*/
|
|
static int ep7211_ir_change_speed(struct irda_task *task)
|
|
{
|
|
irda_task_next_state(task, IRDA_TASK_DONE);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Function ep7211_ir_reset (task)
|
|
*
|
|
* Reset the EP7211 I/R. We don't really have to do anything.
|
|
*
|
|
*/
|
|
static int ep7211_ir_reset(struct irda_task *task)
|
|
{
|
|
irda_task_next_state(task, IRDA_TASK_DONE);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Function ep7211_ir_init(void)
|
|
*
|
|
* Initialize EP7211 I/R module
|
|
*
|
|
*/
|
|
static int __init ep7211_ir_init(void)
|
|
{
|
|
return irda_device_register_dongle(&dongle);
|
|
}
|
|
|
|
/*
|
|
* Function ep7211_ir_cleanup(void)
|
|
*
|
|
* Cleanup EP7211 I/R module
|
|
*
|
|
*/
|
|
static void __exit ep7211_ir_cleanup(void)
|
|
{
|
|
irda_device_unregister_dongle(&dongle);
|
|
}
|
|
|
|
MODULE_AUTHOR("Jon McClintock <jonm@bluemug.com>");
|
|
MODULE_DESCRIPTION("EP7211 I/R driver");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("irda-dongle-8"); /* IRDA_EP7211_IR */
|
|
|
|
module_init(ep7211_ir_init);
|
|
module_exit(ep7211_ir_cleanup);
|