diff options
Diffstat (limited to 'drivers/net/irda/girbil.c')
| -rw-r--r-- | drivers/net/irda/girbil.c | 250 |
1 files changed, 250 insertions, 0 deletions
diff --git a/drivers/net/irda/girbil.c b/drivers/net/irda/girbil.c new file mode 100644 index 000000000000..248aeb0c726c --- /dev/null +++ b/drivers/net/irda/girbil.c @@ -0,0 +1,250 @@ +/********************************************************************* + * + * Filename: girbil.c + * Version: 1.2 + * Description: Implementation for the Greenwich GIrBIL dongle + * Status: Experimental. + * Author: Dag Brattli <dagb@cs.uit.no> + * Created at: Sat Feb 6 21:02:33 1999 + * Modified at: Fri Dec 17 09:13:20 1999 + * Modified by: Dag Brattli <dagb@cs.uit.no> + * + * Copyright (c) 1999 Dag Brattli, 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. + * + * Neither Dag Brattli nor University of Tromsų admit liability nor + * provide warranty for any of this software. This material is + * provided "AS-IS" and at no charge. + * + ********************************************************************/ + +#include <linux/module.h> +#include <linux/delay.h> +#include <linux/tty.h> +#include <linux/init.h> + +#include <net/irda/irda.h> +#include <net/irda/irda_device.h> + +static int girbil_reset(struct irda_task *task); +static void girbil_open(dongle_t *self, struct qos_info *qos); +static void girbil_close(dongle_t *self); +static int girbil_change_speed(struct irda_task *task); + +/* Control register 1 */ +#define GIRBIL_TXEN 0x01 /* Enable transmitter */ +#define GIRBIL_RXEN 0x02 /* Enable receiver */ +#define GIRBIL_ECAN 0x04 /* Cancel self emmited data */ +#define GIRBIL_ECHO 0x08 /* Echo control characters */ + +/* LED Current Register (0x2) */ +#define GIRBIL_HIGH 0x20 +#define GIRBIL_MEDIUM 0x21 +#define GIRBIL_LOW 0x22 + +/* Baud register (0x3) */ +#define GIRBIL_2400 0x30 +#define GIRBIL_4800 0x31 +#define GIRBIL_9600 0x32 +#define GIRBIL_19200 0x33 +#define GIRBIL_38400 0x34 +#define GIRBIL_57600 0x35 +#define GIRBIL_115200 0x36 + +/* Mode register (0x4) */ +#define GIRBIL_IRDA 0x40 +#define GIRBIL_ASK 0x41 + +/* Control register 2 (0x5) */ +#define GIRBIL_LOAD 0x51 /* Load the new baud rate value */ + +static struct dongle_reg dongle = { + .type = IRDA_GIRBIL_DONGLE, + .open = girbil_open, + .close = girbil_close, + .reset = girbil_reset, + .change_speed = girbil_change_speed, + .owner = THIS_MODULE, +}; + +static int __init girbil_init(void) +{ + return irda_device_register_dongle(&dongle); +} + +static void __exit girbil_cleanup(void) +{ + irda_device_unregister_dongle(&dongle); +} + +static void girbil_open(dongle_t *self, struct qos_info *qos) +{ + qos->baud_rate.bits &= IR_9600|IR_19200|IR_38400|IR_57600|IR_115200; + qos->min_turn_time.bits = 0x03; +} + +static void girbil_close(dongle_t *self) +{ + /* Power off dongle */ + self->set_dtr_rts(self->dev, FALSE, FALSE); +} + +/* + * Function girbil_change_speed (dev, speed) + * + * Set the speed for the Girbil type dongle. + * + */ +static int girbil_change_speed(struct irda_task *task) +{ + dongle_t *self = (dongle_t *) task->instance; + __u32 speed = (__u32) task->param; + __u8 control[2]; + int ret = 0; + + self->speed_task = task; + + switch (task->state) { + case IRDA_TASK_INIT: + /* Need to reset the dongle and go to 9600 bps before + programming */ + if (irda_task_execute(self, girbil_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: + IRDA_WARNING("%s(), resetting dongle timed out!\n", + __FUNCTION__); + ret = -1; + break; + case IRDA_TASK_CHILD_DONE: + /* Set DTR and Clear RTS to enter command mode */ + self->set_dtr_rts(self->dev, FALSE, TRUE); + + switch (speed) { + case 9600: + default: + control[0] = GIRBIL_9600; + break; + case 19200: + control[0] = GIRBIL_19200; + break; + case 34800: + control[0] = GIRBIL_38400; + break; + case 57600: + control[0] = GIRBIL_57600; + break; + case 115200: + control[0] = GIRBIL_115200; + break; + } + control[1] = GIRBIL_LOAD; + + /* Write control bytes */ + self->write(self->dev, control, 2); + irda_task_next_state(task, IRDA_TASK_WAIT); + ret = msecs_to_jiffies(100); + 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: + IRDA_ERROR("%s(), unknown state %d\n", + __FUNCTION__, task->state); + irda_task_next_state(task, IRDA_TASK_DONE); + self->speed_task = NULL; + ret = -1; + break; + } + return ret; +} + +/* + * Function girbil_reset (driver) + * + * This function resets the girbil dongle. + * + * Algorithm: + * 0. set RTS, and wait at least 5 ms + * 1. clear RTS + */ +static int girbil_reset(struct irda_task *task) +{ + dongle_t *self = (dongle_t *) task->instance; + __u8 control = GIRBIL_TXEN | GIRBIL_RXEN; + int ret = 0; + + self->reset_task = task; + + switch (task->state) { + case IRDA_TASK_INIT: + /* Reset dongle */ + self->set_dtr_rts(self->dev, TRUE, FALSE); + irda_task_next_state(task, IRDA_TASK_WAIT1); + /* Sleep at least 5 ms */ + ret = msecs_to_jiffies(20); + break; + case IRDA_TASK_WAIT1: + /* Set DTR and clear RTS to enter command mode */ + self->set_dtr_rts(self->dev, FALSE, TRUE); + irda_task_next_state(task, IRDA_TASK_WAIT2); + ret = msecs_to_jiffies(20); + break; + case IRDA_TASK_WAIT2: + /* Write control byte */ + self->write(self->dev, &control, 1); + irda_task_next_state(task, IRDA_TASK_WAIT3); + ret = msecs_to_jiffies(20); + 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: + IRDA_ERROR("%s(), unknown state %d\n", + __FUNCTION__, task->state); + irda_task_next_state(task, IRDA_TASK_DONE); + self->reset_task = NULL; + ret = -1; + break; + } + return ret; +} + +MODULE_AUTHOR("Dag Brattli <dagb@cs.uit.no>"); +MODULE_DESCRIPTION("Greenwich GIrBIL dongle driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("irda-dongle-4"); /* IRDA_GIRBIL_DONGLE */ + +/* + * Function init_module (void) + * + * Initialize Girbil module + * + */ +module_init(girbil_init); + +/* + * Function cleanup_module (void) + * + * Cleanup Girbil module + * + */ +module_exit(girbil_cleanup); + |