patch-2.4.20 linux-2.4.20/drivers/net/irda/act200l.c

• Lines: 300
• Date: Thu Nov 28 15:53:13 2002
• Orig file: linux-2.4.19/drivers/net/irda/act200l.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.19/drivers/net/irda/act200l.c linux-2.4.20/drivers/net/irda/act200l.c
@@ -0,0 +1,299 @@
+/*********************************************************************
+ *
+ * Filename:      act200l.c
+ * Version:       0.8
+ * Description:   Implementation for the ACTiSYS ACT-IR200L dongle
+ * Status:        Experimental.
+ * Author:        SHIMIZU Takuya <tshimizu@ga2.so-net.ne.jp>
+ * Created at:    Fri Aug  3 17:35:42 2001
+ * Modified at:   Fri Aug 17 10:22:40 2001
+ * Modified by:   SHIMIZU Takuya <tshimizu@ga2.so-net.ne.jp>
+ *
+ *     Copyright (c) 2001 SHIMIZU Takuya, 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.
+ *
+ ********************************************************************/
+
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/tty.h>
+#include <linux/sched.h>
+#include <linux/init.h>
+
+#include <net/irda/irda.h>
+#include <net/irda/irda_device.h>
+#include <net/irda/irtty.h>
+
+static int  act200l_reset(struct irda_task *task);
+static void act200l_open(dongle_t *self, struct qos_info *qos);
+static void act200l_close(dongle_t *self);
+static int  act200l_change_speed(struct irda_task *task);
+
+/* Regsiter 0: Control register #1 */
+#define ACT200L_REG0    0x00
+#define ACT200L_TXEN    0x01 /* Enable transmitter */
+#define ACT200L_RXEN    0x02 /* Enable receiver */
+
+/* Register 1: Control register #2 */
+#define ACT200L_REG1    0x10
+#define ACT200L_LODB    0x01 /* Load new baud rate count value */
+#define ACT200L_WIDE    0x04 /* Expand the maximum allowable pulse */
+
+/* Register 4: Output Power register */
+#define ACT200L_REG4    0x40
+#define ACT200L_OP0     0x01 /* Enable LED1C output */
+#define ACT200L_OP1     0x02 /* Enable LED2C output */
+#define ACT200L_BLKR    0x04
+
+/* Register 5: Receive Mode register */
+#define ACT200L_REG5    0x50
+#define ACT200L_RWIDL   0x01 /* fixed 1.6us pulse mode */
+
+/* Register 6: Receive Sensitivity register #1 */
+#define ACT200L_REG6    0x60
+#define ACT200L_RS0     0x01 /* receive threshold bit 0 */
+#define ACT200L_RS1     0x02 /* receive threshold bit 1 */
+
+/* Register 7: Receive Sensitivity register #2 */
+#define ACT200L_REG7    0x70
+#define ACT200L_ENPOS   0x04 /* Ignore the falling edge */
+
+/* Register 8,9: Baud Rate Dvider register #1,#2 */
+#define ACT200L_REG8    0x80
+#define ACT200L_REG9    0x90
+
+#define ACT200L_2400    0x5f
+#define ACT200L_9600    0x17
+#define ACT200L_19200   0x0b
+#define ACT200L_38400   0x05
+#define ACT200L_57600   0x03
+#define ACT200L_115200  0x01
+
+/* Register 13: Control register #3 */
+#define ACT200L_REG13   0xd0
+#define ACT200L_SHDW    0x01 /* Enable access to shadow registers */
+
+/* Register 15: Status register */
+#define ACT200L_REG15   0xf0
+
+/* Register 21: Control register #4 */
+#define ACT200L_REG21   0x50
+#define ACT200L_EXCK    0x02 /* Disable clock output driver */
+#define ACT200L_OSCL    0x04 /* oscillator in low power, medium accuracy mode */
+
+static struct dongle_reg dongle = {
+	Q_NULL,
+	IRDA_ACT200L_DONGLE,
+	act200l_open,
+	act200l_close,
+	act200l_reset,
+	act200l_change_speed,
+};
+
+int __init act200l_init(void)
+{
+	return irda_device_register_dongle(&dongle);
+}
+
+void __exit act200l_cleanup(void)
+{
+	irda_device_unregister_dongle(&dongle);
+}
+
+static void act200l_open(dongle_t *self, struct qos_info *qos)
+{
+	IRDA_DEBUG(2, __FUNCTION__ "()\n");
+
+	/* Power on the dongle */
+	self->set_dtr_rts(self->dev, TRUE, TRUE);
+
+	/* Set the speeds we can accept */
+	qos->baud_rate.bits &= IR_9600|IR_19200|IR_38400|IR_57600|IR_115200;
+	qos->min_turn_time.bits = 0x03;
+
+	MOD_INC_USE_COUNT;
+}
+
+static void act200l_close(dongle_t *self)
+{
+	IRDA_DEBUG(2, __FUNCTION__ "()\n");
+
+	/* Power off the dongle */
+	self->set_dtr_rts(self->dev, FALSE, FALSE);
+
+	MOD_DEC_USE_COUNT;
+}
+
+/*
+ * Function act200l_change_speed (dev, speed)
+ *
+ *    Set the speed for the ACTiSYS ACT-IR200L type dongle.
+ *
+ */
+static int act200l_change_speed(struct irda_task *task)
+{
+	dongle_t *self = (dongle_t *) task->instance;
+	__u32 speed = (__u32) task->param;
+	__u8 control[3];
+	int ret = 0;
+
+	IRDA_DEBUG(2, __FUNCTION__ "()\n");
+
+	self->speed_task = task;
+
+	switch (task->state) {
+	case IRDA_TASK_INIT:
+		if (irda_task_execute(self, act200l_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:
+		WARNING(__FUNCTION__ "(), resetting dongle timed out!\n");
+		ret = -1;
+		break;
+	case IRDA_TASK_CHILD_DONE:
+		/* Clear DTR and set RTS to enter command mode */
+		self->set_dtr_rts(self->dev, FALSE, TRUE);
+
+		switch (speed) {
+		case 9600:
+		default:
+			control[0] = ACT200L_REG8 |  (ACT200L_9600       & 0x0f);
+			control[1] = ACT200L_REG9 | ((ACT200L_9600 >> 4) & 0x0f);
+			break;
+		case 19200:
+			control[0] = ACT200L_REG8 |  (ACT200L_19200       & 0x0f);
+			control[1] = ACT200L_REG9 | ((ACT200L_19200 >> 4) & 0x0f);
+			break;
+		case 38400:
+			control[0] = ACT200L_REG8 |  (ACT200L_38400       & 0x0f);
+			control[1] = ACT200L_REG9 | ((ACT200L_38400 >> 4) & 0x0f);
+			break;
+		case 57600:
+			control[0] = ACT200L_REG8 |  (ACT200L_57600       & 0x0f);
+			control[1] = ACT200L_REG9 | ((ACT200L_57600 >> 4) & 0x0f);
+			break;
+		case 115200:
+			control[0] = ACT200L_REG8 |  (ACT200L_115200       & 0x0f);
+			control[1] = ACT200L_REG9 | ((ACT200L_115200 >> 4) & 0x0f);
+			break;
+		}
+		control[2] = ACT200L_REG1 | ACT200L_LODB | ACT200L_WIDE;
+
+		/* Write control bytes */
+		self->write(self->dev, control, 3);
+		irda_task_next_state(task, IRDA_TASK_WAIT);
+		ret = MSECS_TO_JIFFIES(5);
+		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:
+		ERROR(__FUNCTION__ "(), unknown state %d\n", task->state);
+		irda_task_next_state(task, IRDA_TASK_DONE);
+		self->speed_task = NULL;
+		ret = -1;
+		break;
+	}
+	return ret;
+}
+
+/*
+ * Function act200l_reset (driver)
+ *
+ *    Reset the ACTiSYS ACT-IR200L type dongle.
+ */
+static int act200l_reset(struct irda_task *task)
+{
+	dongle_t *self = (dongle_t *) task->instance;
+	__u8 control[9] = {
+		ACT200L_REG15,
+		ACT200L_REG13 | ACT200L_SHDW,
+		ACT200L_REG21 | ACT200L_EXCK | ACT200L_OSCL,
+		ACT200L_REG13,
+		ACT200L_REG7  | ACT200L_ENPOS,
+		ACT200L_REG6  | ACT200L_RS0  | ACT200L_RS1,
+		ACT200L_REG5  | ACT200L_RWIDL,
+		ACT200L_REG4  | ACT200L_OP0  | ACT200L_OP1 | ACT200L_BLKR,
+		ACT200L_REG0  | ACT200L_TXEN | ACT200L_RXEN
+	};
+	int ret = 0;
+
+	IRDA_DEBUG(2, __FUNCTION__ "()\n");
+
+	self->reset_task = task;
+
+	switch (task->state) {
+	case IRDA_TASK_INIT:
+		/* Power on the dongle */
+		self->set_dtr_rts(self->dev, TRUE, TRUE);
+
+		irda_task_next_state(task, IRDA_TASK_WAIT1);
+		ret = MSECS_TO_JIFFIES(50);
+		break;
+	case IRDA_TASK_WAIT1:
+		/* Reset the dongle : set RTS low for 25 ms */
+		self->set_dtr_rts(self->dev, TRUE, FALSE);
+
+		irda_task_next_state(task, IRDA_TASK_WAIT2);
+		ret = MSECS_TO_JIFFIES(50);
+		break;
+	case IRDA_TASK_WAIT2:
+		/* Clear DTR and set RTS to enter command mode */
+		self->set_dtr_rts(self->dev, FALSE, TRUE);
+
+		/* Write control bytes */
+		self->write(self->dev, control, 9);
+		irda_task_next_state(task, IRDA_TASK_WAIT3);
+		ret = MSECS_TO_JIFFIES(15);
+		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:
+		ERROR(__FUNCTION__ "(), unknown state %d\n", task->state);
+		irda_task_next_state(task, IRDA_TASK_DONE);
+		self->reset_task = NULL;
+		ret = -1;
+		break;
+	}
+	return ret;
+}
+
+MODULE_AUTHOR("SHIMIZU Takuya <tshimizu@ga2.so-net.ne.jp>");
+MODULE_DESCRIPTION("ACTiSYS ACT-IR200L dongle driver");
+MODULE_LICENSE("GPL");
+
+/*
+ * Function init_module (void)
+ *
+ *    Initialize ACTiSYS ACT-IR200L module
+ *
+ */
+module_init(act200l_init);
+
+/*
+ * Function cleanup_module (void)
+ *
+ *    Cleanup ACTiSYS ACT-IR200L module
+ *
+ */
+module_exit(act200l_cleanup);