ep7211_ir.c
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:3k
- /*
- * 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/sched.h>
- #include <linux/init.h>
- #include <net/irda/irda.h>
- #include <net/irda/irmod.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 struct dongle_reg dongle = {
- Q_NULL,
- IRDA_EP7211_IR,
- ep7211_ir_open,
- ep7211_ir_close,
- ep7211_ir_reset,
- ep7211_ir_change_speed,
- };
- static void ep7211_ir_open(dongle_t *self, struct qos_info *qos)
- {
- unsigned int syscon1, flags;
- save_flags(flags); cli();
- /* 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). */
- restore_flags(flags);
- MOD_INC_USE_COUNT;
- }
- static void ep7211_ir_close(dongle_t *self)
- {
- unsigned int syscon1, flags;
- save_flags(flags); cli();
- /* 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. */
- restore_flags(flags);
- MOD_DEC_USE_COUNT;
- }
- /*
- * 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
- *
- */
- 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");
-
- #ifdef MODULE
- module_init(ep7211_ir_init);
- #endif /* MODULE */
- module_exit(ep7211_ir_cleanup);