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