diff options
Diffstat (limited to 'drivers/staging/irda/drivers/esi-sir.c')
| -rw-r--r-- | drivers/staging/irda/drivers/esi-sir.c | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/drivers/staging/irda/drivers/esi-sir.c b/drivers/staging/irda/drivers/esi-sir.c new file mode 100644 index 000000000000..019a3e848bcb --- /dev/null +++ b/drivers/staging/irda/drivers/esi-sir.c @@ -0,0 +1,157 @@ +/********************************************************************* + * + * Filename: esi.c + * Version: 1.6 + * Description: Driver for the Extended Systems JetEye PC dongle + * Status: Experimental. + * Author: Dag Brattli <dagb@cs.uit.no> + * Created at: Sat Feb 21 18:54:38 1998 + * Modified at: Sun Oct 27 22:01:04 2002 + * Modified by: Martin Diehl <mad@mdiehl.de> + * + * Copyright (c) 1999 Dag Brattli, <dagb@cs.uit.no>, + * Copyright (c) 1998 Thomas Davis, <ratbert@radiks.net>, + * Copyright (c) 2002 Martin Diehl, <mad@mdiehl.de>, + * 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. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <http://www.gnu.org/licenses/>. + * + ********************************************************************/ + +#include <linux/module.h> +#include <linux/delay.h> +#include <linux/init.h> + +#include <net/irda/irda.h> + +#include "sir-dev.h" + +static int esi_open(struct sir_dev *); +static int esi_close(struct sir_dev *); +static int esi_change_speed(struct sir_dev *, unsigned); +static int esi_reset(struct sir_dev *); + +static struct dongle_driver esi = { + .owner = THIS_MODULE, + .driver_name = "JetEye PC ESI-9680 PC", + .type = IRDA_ESI_DONGLE, + .open = esi_open, + .close = esi_close, + .reset = esi_reset, + .set_speed = esi_change_speed, +}; + +static int __init esi_sir_init(void) +{ + return irda_register_dongle(&esi); +} + +static void __exit esi_sir_cleanup(void) +{ + irda_unregister_dongle(&esi); +} + +static int esi_open(struct sir_dev *dev) +{ + struct qos_info *qos = &dev->qos; + + /* Power up and set dongle to 9600 baud */ + sirdev_set_dtr_rts(dev, FALSE, TRUE); + + qos->baud_rate.bits &= IR_9600|IR_19200|IR_115200; + qos->min_turn_time.bits = 0x01; /* Needs at least 10 ms */ + irda_qos_bits_to_value(qos); + + /* irda thread waits 50 msec for power settling */ + + return 0; +} + +static int esi_close(struct sir_dev *dev) +{ + /* Power off dongle */ + sirdev_set_dtr_rts(dev, FALSE, FALSE); + + return 0; +} + +/* + * Function esi_change_speed (task) + * + * Set the speed for the Extended Systems JetEye PC ESI-9680 type dongle + * Apparently (see old esi-driver) no delays are needed here... + * + */ +static int esi_change_speed(struct sir_dev *dev, unsigned speed) +{ + int ret = 0; + int dtr, rts; + + switch (speed) { + case 19200: + dtr = TRUE; + rts = FALSE; + break; + case 115200: + dtr = rts = TRUE; + break; + default: + ret = -EINVAL; + speed = 9600; + /* fall through */ + case 9600: + dtr = FALSE; + rts = TRUE; + break; + } + + /* Change speed of dongle */ + sirdev_set_dtr_rts(dev, dtr, rts); + dev->speed = speed; + + return ret; +} + +/* + * Function esi_reset (task) + * + * Reset dongle; + * + */ +static int esi_reset(struct sir_dev *dev) +{ + sirdev_set_dtr_rts(dev, FALSE, FALSE); + + /* Hm, the old esi-driver left the dongle unpowered relying on + * the following speed change to repower. This might work for + * the esi because we only need the modem lines. However, now the + * general rule is reset must bring the dongle to some working + * well-known state because speed change might write to registers. + * The old esi-driver didn't any delay here - let's hope it' fine. + */ + + sirdev_set_dtr_rts(dev, FALSE, TRUE); + dev->speed = 9600; + + return 0; +} + +MODULE_AUTHOR("Dag Brattli <dagb@cs.uit.no>"); +MODULE_DESCRIPTION("Extended Systems JetEye PC dongle driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("irda-dongle-1"); /* IRDA_ESI_DONGLE */ + +module_init(esi_sir_init); +module_exit(esi_sir_cleanup); + |