act200l.c
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上传日期:2013-04-10
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- /*********************************************************************
- *
- * Filename: act200l.c
- * Version: 0.8
- * Description: Implementation for the ACTiSYS ACT-IR200L dongle
- * Status: Experimental.
- * Author: SHIMIZU Takuya <tshimizu@ga2.so-net.ne.jp>
- * Created at: Fri Aug 3 17:35:42 2001
- * Modified at: Fri Aug 17 10:22:40 2001
- * Modified by: SHIMIZU Takuya <tshimizu@ga2.so-net.ne.jp>
- *
- * Copyright (c) 2001 SHIMIZU Takuya, All Rights Reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- ********************************************************************/
- #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/irda_device.h>
- #include <net/irda/irtty.h>
- static int act200l_reset(struct irda_task *task);
- static void act200l_open(dongle_t *self, struct qos_info *qos);
- static void act200l_close(dongle_t *self);
- static int act200l_change_speed(struct irda_task *task);
- /* Regsiter 0: Control register #1 */
- #define ACT200L_REG0 0x00
- #define ACT200L_TXEN 0x01 /* Enable transmitter */
- #define ACT200L_RXEN 0x02 /* Enable receiver */
- /* Register 1: Control register #2 */
- #define ACT200L_REG1 0x10
- #define ACT200L_LODB 0x01 /* Load new baud rate count value */
- #define ACT200L_WIDE 0x04 /* Expand the maximum allowable pulse */
- /* Register 4: Output Power register */
- #define ACT200L_REG4 0x40
- #define ACT200L_OP0 0x01 /* Enable LED1C output */
- #define ACT200L_OP1 0x02 /* Enable LED2C output */
- #define ACT200L_BLKR 0x04
- /* Register 5: Receive Mode register */
- #define ACT200L_REG5 0x50
- #define ACT200L_RWIDL 0x01 /* fixed 1.6us pulse mode */
- /* Register 6: Receive Sensitivity register #1 */
- #define ACT200L_REG6 0x60
- #define ACT200L_RS0 0x01 /* receive threshold bit 0 */
- #define ACT200L_RS1 0x02 /* receive threshold bit 1 */
- /* Register 7: Receive Sensitivity register #2 */
- #define ACT200L_REG7 0x70
- #define ACT200L_ENPOS 0x04 /* Ignore the falling edge */
- /* Register 8,9: Baud Rate Dvider register #1,#2 */
- #define ACT200L_REG8 0x80
- #define ACT200L_REG9 0x90
- #define ACT200L_2400 0x5f
- #define ACT200L_9600 0x17
- #define ACT200L_19200 0x0b
- #define ACT200L_38400 0x05
- #define ACT200L_57600 0x03
- #define ACT200L_115200 0x01
- /* Register 13: Control register #3 */
- #define ACT200L_REG13 0xd0
- #define ACT200L_SHDW 0x01 /* Enable access to shadow registers */
- /* Register 15: Status register */
- #define ACT200L_REG15 0xf0
- /* Register 21: Control register #4 */
- #define ACT200L_REG21 0x50
- #define ACT200L_EXCK 0x02 /* Disable clock output driver */
- #define ACT200L_OSCL 0x04 /* oscillator in low power, medium accuracy mode */
- static struct dongle_reg dongle = {
- Q_NULL,
- IRDA_ACT200L_DONGLE,
- act200l_open,
- act200l_close,
- act200l_reset,
- act200l_change_speed,
- };
- int __init act200l_init(void)
- {
- return irda_device_register_dongle(&dongle);
- }
- void __exit act200l_cleanup(void)
- {
- irda_device_unregister_dongle(&dongle);
- }
- static void act200l_open(dongle_t *self, struct qos_info *qos)
- {
- IRDA_DEBUG(2, __FUNCTION__ "()n");
- /* Power on the dongle */
- self->set_dtr_rts(self->dev, TRUE, TRUE);
- /* Set the speeds we can accept */
- qos->baud_rate.bits &= IR_9600|IR_19200|IR_38400|IR_57600|IR_115200;
- qos->min_turn_time.bits = 0x03;
- MOD_INC_USE_COUNT;
- }
- static void act200l_close(dongle_t *self)
- {
- IRDA_DEBUG(2, __FUNCTION__ "()n");
- /* Power off the dongle */
- self->set_dtr_rts(self->dev, FALSE, FALSE);
- MOD_DEC_USE_COUNT;
- }
- /*
- * Function act200l_change_speed (dev, speed)
- *
- * Set the speed for the ACTiSYS ACT-IR200L type dongle.
- *
- */
- static int act200l_change_speed(struct irda_task *task)
- {
- dongle_t *self = (dongle_t *) task->instance;
- __u32 speed = (__u32) task->param;
- __u8 control[3];
- int ret = 0;
- IRDA_DEBUG(2, __FUNCTION__ "()n");
- self->speed_task = task;
- switch (task->state) {
- case IRDA_TASK_INIT:
- if (irda_task_execute(self, act200l_reset, NULL, task,
- (void *) speed))
- {
- /* Dongle need more time to reset */
- irda_task_next_state(task, IRDA_TASK_CHILD_WAIT);
- /* Give reset 1 sec to finish */
- ret = MSECS_TO_JIFFIES(1000);
- }
- break;
- case IRDA_TASK_CHILD_WAIT:
- WARNING(__FUNCTION__ "(), resetting dongle timed out!n");
- ret = -1;
- break;
- case IRDA_TASK_CHILD_DONE:
- /* Clear DTR and set RTS to enter command mode */
- self->set_dtr_rts(self->dev, FALSE, TRUE);
- switch (speed) {
- case 9600:
- default:
- control[0] = ACT200L_REG8 | (ACT200L_9600 & 0x0f);
- control[1] = ACT200L_REG9 | ((ACT200L_9600 >> 4) & 0x0f);
- break;
- case 19200:
- control[0] = ACT200L_REG8 | (ACT200L_19200 & 0x0f);
- control[1] = ACT200L_REG9 | ((ACT200L_19200 >> 4) & 0x0f);
- break;
- case 38400:
- control[0] = ACT200L_REG8 | (ACT200L_38400 & 0x0f);
- control[1] = ACT200L_REG9 | ((ACT200L_38400 >> 4) & 0x0f);
- break;
- case 57600:
- control[0] = ACT200L_REG8 | (ACT200L_57600 & 0x0f);
- control[1] = ACT200L_REG9 | ((ACT200L_57600 >> 4) & 0x0f);
- break;
- case 115200:
- control[0] = ACT200L_REG8 | (ACT200L_115200 & 0x0f);
- control[1] = ACT200L_REG9 | ((ACT200L_115200 >> 4) & 0x0f);
- break;
- }
- control[2] = ACT200L_REG1 | ACT200L_LODB | ACT200L_WIDE;
- /* Write control bytes */
- self->write(self->dev, control, 3);
- irda_task_next_state(task, IRDA_TASK_WAIT);
- ret = MSECS_TO_JIFFIES(5);
- break;
- case IRDA_TASK_WAIT:
- /* Go back to normal mode */
- self->set_dtr_rts(self->dev, TRUE, TRUE);
- irda_task_next_state(task, IRDA_TASK_DONE);
- self->speed_task = NULL;
- break;
- default:
- ERROR(__FUNCTION__ "(), unknown state %dn", task->state);
- irda_task_next_state(task, IRDA_TASK_DONE);
- self->speed_task = NULL;
- ret = -1;
- break;
- }
- return ret;
- }
- /*
- * Function act200l_reset (driver)
- *
- * Reset the ACTiSYS ACT-IR200L type dongle.
- */
- static int act200l_reset(struct irda_task *task)
- {
- dongle_t *self = (dongle_t *) task->instance;
- __u8 control[9] = {
- ACT200L_REG15,
- ACT200L_REG13 | ACT200L_SHDW,
- ACT200L_REG21 | ACT200L_EXCK | ACT200L_OSCL,
- ACT200L_REG13,
- ACT200L_REG7 | ACT200L_ENPOS,
- ACT200L_REG6 | ACT200L_RS0 | ACT200L_RS1,
- ACT200L_REG5 | ACT200L_RWIDL,
- ACT200L_REG4 | ACT200L_OP0 | ACT200L_OP1 | ACT200L_BLKR,
- ACT200L_REG0 | ACT200L_TXEN | ACT200L_RXEN
- };
- int ret = 0;
- IRDA_DEBUG(2, __FUNCTION__ "()n");
- self->reset_task = task;
- switch (task->state) {
- case IRDA_TASK_INIT:
- /* Power on the dongle */
- self->set_dtr_rts(self->dev, TRUE, TRUE);
- irda_task_next_state(task, IRDA_TASK_WAIT1);
- ret = MSECS_TO_JIFFIES(50);
- break;
- case IRDA_TASK_WAIT1:
- /* Reset the dongle : set RTS low for 25 ms */
- self->set_dtr_rts(self->dev, TRUE, FALSE);
- irda_task_next_state(task, IRDA_TASK_WAIT2);
- ret = MSECS_TO_JIFFIES(50);
- break;
- case IRDA_TASK_WAIT2:
- /* Clear DTR and set RTS to enter command mode */
- self->set_dtr_rts(self->dev, FALSE, TRUE);
- /* Write control bytes */
- self->write(self->dev, control, 9);
- irda_task_next_state(task, IRDA_TASK_WAIT3);
- ret = MSECS_TO_JIFFIES(15);
- break;
- case IRDA_TASK_WAIT3:
- /* Go back to normal mode */
- self->set_dtr_rts(self->dev, TRUE, TRUE);
- irda_task_next_state(task, IRDA_TASK_DONE);
- self->reset_task = NULL;
- break;
- default:
- ERROR(__FUNCTION__ "(), unknown state %dn", task->state);
- irda_task_next_state(task, IRDA_TASK_DONE);
- self->reset_task = NULL;
- ret = -1;
- break;
- }
- return ret;
- }
- MODULE_AUTHOR("SHIMIZU Takuya <tshimizu@ga2.so-net.ne.jp>");
- MODULE_DESCRIPTION("ACTiSYS ACT-IR200L dongle driver");
- MODULE_LICENSE("GPL");
- /*
- * Function init_module (void)
- *
- * Initialize ACTiSYS ACT-IR200L module
- *
- */
- module_init(act200l_init);
- /*
- * Function cleanup_module (void)
- *
- * Cleanup ACTiSYS ACT-IR200L module
- *
- */
- module_exit(act200l_cleanup);