summaryrefslogtreecommitdiffstats
path: root/drivers/net/irda/girbil.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/net/irda/girbil.c')
-rw-r--r--drivers/net/irda/girbil.c250
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 00000000000..248aeb0c726
--- /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);
+
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-22 10:00:14 +0000