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/*
* 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);
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