[IRDA]: Add act200l-sir driver.

From Martin Diehl.

* converted for new api from old driver

drivers/net/irda/act200l-sir.c

+/*********************************************************************
+ *
+ * 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/init.h>
+
+#include <net/irda/irda.h>
+
+#include "sir-dev.h"
+
+static int act200l_reset(struct sir_dev *dev);
+static int act200l_open(struct sir_dev *dev);
+static int act200l_close(struct sir_dev *dev);
+static int act200l_change_speed(struct sir_dev *dev, unsigned speed);
+
+/* 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_driver act200l = {
+	.owner		= THIS_MODULE,
+	.driver_name	= "ACTiSYS ACT-IR200L",
+	.type		= IRDA_ACT200L_DONGLE,
+	.open		= act200l_open,
+	.close		= act200l_close,
+	.reset		= act200l_reset,
+	.set_speed	= act200l_change_speed,
+};
+
+int __init act200l_init(void)
+{
+	return irda_register_dongle(&act200l);
+}
+
+void __exit act200l_cleanup(void)
+{
+	irda_unregister_dongle(&act200l);
+}
+
+static int act200l_open(struct sir_dev *dev)
+{
+	struct qos_info *qos = &dev->qos;
+
+	IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
+
+	/* Power on the dongle */
+	sirdev_set_dtr_rts(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;
+	irda_qos_bits_to_value(qos);
+
+	/* irda thread waits 50 msec for power settling */
+
+	return 0;
+}
+
+static int act200l_close(struct sir_dev *dev)
+{
+	IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
+
+	/* Power off the dongle */
+	sirdev_set_dtr_rts(dev, FALSE, FALSE);
+
+	return 0;
+}
+
+/*
+ * Function act200l_change_speed (dev, speed)
+ *
+ *    Set the speed for the ACTiSYS ACT-IR200L type dongle.
+ *
+ */
+static int act200l_change_speed(struct sir_dev *dev, unsigned speed)
+{
+	u8 control[3];
+	int ret = 0;
+
+	IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
+
+	/* Clear DTR and set RTS to enter command mode */
+	sirdev_set_dtr_rts(dev, FALSE, TRUE);
+
+	switch (speed) {
+	default:
+		ret = -EINVAL;
+		/* fall through */
+	case 9600:
+		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 */
+	sirdev_raw_write(dev, control, 3);
+	set_current_state(TASK_UNINTERRUPTIBLE);
+	schedule_timeout(MSECS_TO_JIFFIES(5));
+
+	/* Go back to normal mode */
+	sirdev_set_dtr_rts(dev, TRUE, TRUE);
+
+	dev->speed = speed;
+	return ret;
+}
+
+/*
+ * Function act200l_reset (driver)
+ *
+ *    Reset the ACTiSYS ACT-IR200L type dongle.
+ */
+
+#define ACT200L_STATE_WAIT1_RESET	(SIRDEV_STATE_DONGLE_RESET+1)
+#define ACT200L_STATE_WAIT2_RESET	(SIRDEV_STATE_DONGLE_RESET+2)
+
+static int act200l_reset(struct sir_dev *dev)
+{
+	unsigned state = dev->fsm.substate;
+	unsigned delay = 0;
+	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, "%s()\n", __FUNCTION__ );
+
+	switch (state) {
+	case SIRDEV_STATE_DONGLE_RESET:
+		/* Reset the dongle : set RTS low for 25 ms */
+		sirdev_set_dtr_rts(dev, TRUE, FALSE);
+		state = ACT200L_STATE_WAIT1_RESET;
+		delay = 50;
+		break;
+
+	case ACT200L_STATE_WAIT1_RESET:
+		/* Clear DTR and set RTS to enter command mode */
+		sirdev_set_dtr_rts(dev, FALSE, TRUE);
+
+		udelay(25);			/* better wait for some short while */
+
+		/* Write control bytes */
+		sirdev_raw_write(dev, control, sizeof(control));
+		state = ACT200L_STATE_WAIT2_RESET;
+		delay = 15;
+		break;
+
+	case ACT200L_STATE_WAIT2_RESET:
+		/* Go back to normal mode */
+		sirdev_set_dtr_rts(dev, TRUE, TRUE);
+		dev->speed = 9600;
+		break;
+	default:
+		ERROR("%s(), unknown state %d\n", __FUNCTION__, state);
+		ret = -1;
+		break;
+	}
+	dev->fsm.substate = state;
+	return (delay > 0) ? delay : ret;
+}
+
+MODULE_AUTHOR("SHIMIZU Takuya <tshimizu@ga2.so-net.ne.jp>");
+MODULE_DESCRIPTION("ACTiSYS ACT-IR200L dongle driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("irda-dongle-10"); /* IRDA_ACT200L_DONGLE */
+
+module_init(act200l_init);
+module_exit(act200l_cleanup);