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Diffstat (limited to 'drivers/net/irda/ma600.c')
-rw-r--r--drivers/net/irda/ma600.c354
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 00000000000..f5e6836667f
--- /dev/null
+++ b/drivers/net/irda/ma600.c
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+/*********************************************************************
+ *
+ * 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);
+
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