diff options
Diffstat (limited to 'drivers/net/irda/ma600.c')
| -rw-r--r-- | drivers/net/irda/ma600.c | 354 |
1 files changed, 354 insertions, 0 deletions
diff --git a/drivers/net/irda/ma600.c b/drivers/net/irda/ma600.c new file mode 100644 index 000000000000..f5e6836667fd --- /dev/null +++ b/drivers/net/irda/ma600.c @@ -0,0 +1,354 @@ +/********************************************************************* + * + * Filename: ma600.c + * Version: 0.1 + * Description: Implementation of the MA600 dongle + * Status: Experimental. + * Author: Leung <95Etwl@alumni.ee.ust.hk> http://www.engsvr.ust/~eetwl95 + * Created at: Sat Jun 10 20:02:35 2000 + * Modified at: + * Modified by: + * + * Note: very thanks to Mr. Maru Wang <maru@mobileaction.com.tw> for providing + * information on the MA600 dongle + * + * Copyright (c) 2000 Leung, 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, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + * + ********************************************************************/ + +/* define this macro for release version */ +//#define NDEBUG + +#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> + +#ifndef NDEBUG + #undef IRDA_DEBUG + #define IRDA_DEBUG(n, args...) (printk(KERN_DEBUG args)) + + #undef ASSERT + #define ASSERT(expr, func) \ + if(!(expr)) { \ + printk( "Assertion failed! %s,%s,%s,line=%d\n",\ + #expr,__FILE__,__FUNCTION__,__LINE__); \ + func} +#endif + +/* convert hex value to ascii hex */ +static const char hexTbl[] = "0123456789ABCDEF"; + + +static void ma600_open(dongle_t *self, struct qos_info *qos); +static void ma600_close(dongle_t *self); +static int ma600_change_speed(struct irda_task *task); +static int ma600_reset(struct irda_task *task); + +/* control byte for MA600 */ +#define MA600_9600 0x00 +#define MA600_19200 0x01 +#define MA600_38400 0x02 +#define MA600_57600 0x03 +#define MA600_115200 0x04 +#define MA600_DEV_ID1 0x05 +#define MA600_DEV_ID2 0x06 +#define MA600_2400 0x08 + +static struct dongle_reg dongle = { + .type = IRDA_MA600_DONGLE, + .open = ma600_open, + .close = ma600_close, + .reset = ma600_reset, + .change_speed = ma600_change_speed, + .owner = THIS_MODULE, +}; + +static int __init ma600_init(void) +{ + IRDA_DEBUG(2, "%s()\n", __FUNCTION__); + return irda_device_register_dongle(&dongle); +} + +static void __exit ma600_cleanup(void) +{ + IRDA_DEBUG(2, "%s()\n", __FUNCTION__); + irda_device_unregister_dongle(&dongle); +} + +/* + Power on: + (0) Clear RTS and DTR for 1 second + (1) Set RTS and DTR for 1 second + (2) 9600 bps now + Note: assume RTS, DTR are clear before +*/ +static void ma600_open(dongle_t *self, struct qos_info *qos) +{ + IRDA_DEBUG(2, "%s()\n", __FUNCTION__); + + qos->baud_rate.bits &= IR_2400|IR_9600|IR_19200|IR_38400 + |IR_57600|IR_115200; + qos->min_turn_time.bits = 0x01; /* Needs at least 1 ms */ + irda_qos_bits_to_value(qos); + + //self->set_dtr_rts(self->dev, FALSE, FALSE); + // should wait 1 second + + self->set_dtr_rts(self->dev, TRUE, TRUE); + // should wait 1 second +} + +static void ma600_close(dongle_t *self) +{ + IRDA_DEBUG(2, "%s()\n", __FUNCTION__); + + /* Power off dongle */ + self->set_dtr_rts(self->dev, FALSE, FALSE); +} + +static __u8 get_control_byte(__u32 speed) +{ + __u8 byte; + + switch (speed) { + default: + case 115200: + byte = MA600_115200; + break; + case 57600: + byte = MA600_57600; + break; + case 38400: + byte = MA600_38400; + break; + case 19200: + byte = MA600_19200; + break; + case 9600: + byte = MA600_9600; + break; + case 2400: + byte = MA600_2400; + break; + } + + return byte; +} + +/* + * Function ma600_change_speed (dev, state, speed) + * + * Set the speed for the MA600 type dongle. Warning, this + * function must be called with a process context! + * + * Algorithm + * 1. Reset + * 2. clear RTS, set DTR and wait for 1ms + * 3. send Control Byte to the MA600 through TXD to set new baud rate + * wait until the stop bit of Control Byte is sent (for 9600 baud rate, + * it takes about 10 msec) + * 4. set RTS, set DTR (return to NORMAL Operation) + * 5. wait at least 10 ms, new setting (baud rate, etc) takes effect here + * after + */ +static int ma600_change_speed(struct irda_task *task) +{ + dongle_t *self = (dongle_t *) task->instance; + __u32 speed = (__u32) task->param; + static __u8 byte; + __u8 byte_echo; + int ret = 0; + + IRDA_DEBUG(2, "%s()\n", __FUNCTION__); + + ASSERT(task != NULL, return -1;); + + if (self->speed_task && self->speed_task != task) { + IRDA_DEBUG(0, "%s(), busy!\n", __FUNCTION__); + return msecs_to_jiffies(10); + } else { + self->speed_task = task; + } + + switch (task->state) { + case IRDA_TASK_INIT: + case IRDA_TASK_CHILD_INIT: + /* + * Need to reset the dongle and go to 9600 bps before + * programming + */ + if (irda_task_execute(self, ma600_reset, NULL, task, + (void *) speed)) { + /* Dongle need more time to reset */ + irda_task_next_state(task, IRDA_TASK_CHILD_WAIT); + + /* give 1 second to finish */ + ret = msecs_to_jiffies(1000); + } else { + irda_task_next_state(task, IRDA_TASK_CHILD_DONE); + } + 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, Clear RTS */ + self->set_dtr_rts(self->dev, TRUE, FALSE); + + ret = msecs_to_jiffies(1); /* Sleep 1 ms */ + irda_task_next_state(task, IRDA_TASK_WAIT); + break; + + case IRDA_TASK_WAIT: + speed = (__u32) task->param; + byte = get_control_byte(speed); + + /* Write control byte */ + self->write(self->dev, &byte, sizeof(byte)); + + irda_task_next_state(task, IRDA_TASK_WAIT1); + + /* Wait at least 10 ms */ + ret = msecs_to_jiffies(15); + break; + + case IRDA_TASK_WAIT1: + /* Read control byte echo */ + self->read(self->dev, &byte_echo, sizeof(byte_echo)); + + if(byte != byte_echo) { + /* if control byte != echo, I don't know what to do */ + printk(KERN_WARNING "%s() control byte written != read!\n", __FUNCTION__); + printk(KERN_WARNING "control byte = 0x%c%c\n", + hexTbl[(byte>>4)&0x0f], hexTbl[byte&0x0f]); + printk(KERN_WARNING "byte echo = 0x%c%c\n", + hexTbl[(byte_echo>>4) & 0x0f], + hexTbl[byte_echo & 0x0f]); + #ifndef NDEBUG + } else { + IRDA_DEBUG(2, "%s() control byte write read OK\n", __FUNCTION__); + #endif + } + + /* Set DTR, Set RTS */ + self->set_dtr_rts(self->dev, TRUE, TRUE); + + irda_task_next_state(task, IRDA_TASK_WAIT2); + + /* Wait at least 10 ms */ + ret = msecs_to_jiffies(10); + break; + + case IRDA_TASK_WAIT2: + 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 ma600_reset (driver) + * + * This function resets the ma600 dongle. Warning, this function + * must be called with a process context!! + * + * Algorithm: + * 0. DTR=0, RTS=1 and wait 10 ms + * 1. DTR=1, RTS=1 and wait 10 ms + * 2. 9600 bps now + */ +int ma600_reset(struct irda_task *task) +{ + dongle_t *self = (dongle_t *) task->instance; + int ret = 0; + + IRDA_DEBUG(2, "%s()\n", __FUNCTION__); + + ASSERT(task != NULL, return -1;); + + if (self->reset_task && self->reset_task != task) { + IRDA_DEBUG(0, "%s(), busy!\n", __FUNCTION__); + return msecs_to_jiffies(10); + } else + self->reset_task = task; + + switch (task->state) { + case IRDA_TASK_INIT: + /* Clear DTR and Set RTS */ + self->set_dtr_rts(self->dev, FALSE, TRUE); + irda_task_next_state(task, IRDA_TASK_WAIT1); + ret = msecs_to_jiffies(10); /* Sleep 10 ms */ + break; + case IRDA_TASK_WAIT1: + /* Set DTR and RTS */ + self->set_dtr_rts(self->dev, TRUE, TRUE); + irda_task_next_state(task, IRDA_TASK_WAIT2); + ret = msecs_to_jiffies(10); /* Sleep 10 ms */ + break; + case IRDA_TASK_WAIT2: + 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; + } + return ret; +} + +MODULE_AUTHOR("Leung <95Etwl@alumni.ee.ust.hk> http://www.engsvr.ust/~eetwl95"); +MODULE_DESCRIPTION("MA600 dongle driver version 0.1"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("irda-dongle-11"); /* IRDA_MA600_DONGLE */ + +/* + * Function init_module (void) + * + * Initialize MA600 module + * + */ +module_init(ma600_init); + +/* + * Function cleanup_module (void) + * + * Cleanup MA600 module + * + */ +module_exit(ma600_cleanup); + |
