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Diffstat (limited to 'kernel/drivers/net/irda/girbil-sir.c')
-rw-r--r--kernel/drivers/net/irda/girbil-sir.c252
1 files changed, 252 insertions, 0 deletions
diff --git a/kernel/drivers/net/irda/girbil-sir.c b/kernel/drivers/net/irda/girbil-sir.c
new file mode 100644
index 000000000..7e0a5b8c6
--- /dev/null
+++ b/kernel/drivers/net/irda/girbil-sir.c
@@ -0,0 +1,252 @@
+/*********************************************************************
+ *
+ * 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 Tromsø 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/init.h>
+
+#include <net/irda/irda.h>
+
+#include "sir-dev.h"
+
+static int girbil_reset(struct sir_dev *dev);
+static int girbil_open(struct sir_dev *dev);
+static int girbil_close(struct sir_dev *dev);
+static int girbil_change_speed(struct sir_dev *dev, unsigned speed);
+
+/* Control register 1 */
+#define GIRBIL_TXEN 0x01 /* Enable transmitter */
+#define GIRBIL_RXEN 0x02 /* Enable receiver */
+#define GIRBIL_ECAN 0x04 /* Cancel self emitted 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_driver girbil = {
+ .owner = THIS_MODULE,
+ .driver_name = "Greenwich GIrBIL",
+ .type = IRDA_GIRBIL_DONGLE,
+ .open = girbil_open,
+ .close = girbil_close,
+ .reset = girbil_reset,
+ .set_speed = girbil_change_speed,
+};
+
+static int __init girbil_sir_init(void)
+{
+ return irda_register_dongle(&girbil);
+}
+
+static void __exit girbil_sir_cleanup(void)
+{
+ irda_unregister_dongle(&girbil);
+}
+
+static int girbil_open(struct sir_dev *dev)
+{
+ struct qos_info *qos = &dev->qos;
+
+ /* Power on dongle */
+ sirdev_set_dtr_rts(dev, TRUE, TRUE);
+
+ 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 girbil_close(struct sir_dev *dev)
+{
+ /* Power off dongle */
+ sirdev_set_dtr_rts(dev, FALSE, FALSE);
+
+ return 0;
+}
+
+/*
+ * Function girbil_change_speed (dev, speed)
+ *
+ * Set the speed for the Girbil type dongle.
+ *
+ */
+
+#define GIRBIL_STATE_WAIT_SPEED (SIRDEV_STATE_DONGLE_SPEED + 1)
+
+static int girbil_change_speed(struct sir_dev *dev, unsigned speed)
+{
+ unsigned state = dev->fsm.substate;
+ unsigned delay = 0;
+ u8 control[2];
+ static int ret = 0;
+
+ /* dongle alread reset - port and dongle at default speed */
+
+ switch(state) {
+
+ case SIRDEV_STATE_DONGLE_SPEED:
+
+ /* Set DTR and Clear RTS to enter command mode */
+ sirdev_set_dtr_rts(dev, FALSE, TRUE);
+
+ udelay(25); /* better wait a little while */
+
+ ret = 0;
+ switch (speed) {
+ default:
+ ret = -EINVAL;
+ /* fall through */
+ case 9600:
+ 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 */
+ sirdev_raw_write(dev, control, 2);
+
+ dev->speed = speed;
+
+ state = GIRBIL_STATE_WAIT_SPEED;
+ delay = 100;
+ break;
+
+ case GIRBIL_STATE_WAIT_SPEED:
+ /* Go back to normal mode */
+ sirdev_set_dtr_rts(dev, TRUE, TRUE);
+
+ udelay(25); /* better wait a little while */
+ break;
+
+ default:
+ net_err_ratelimited("%s - undefined state %d\n",
+ __func__, state);
+ ret = -EINVAL;
+ break;
+ }
+ dev->fsm.substate = state;
+ return (delay > 0) ? delay : ret;
+}
+
+/*
+ * Function girbil_reset (driver)
+ *
+ * This function resets the girbil dongle.
+ *
+ * Algorithm:
+ * 0. set RTS, and wait at least 5 ms
+ * 1. clear RTS
+ */
+
+
+#define GIRBIL_STATE_WAIT1_RESET (SIRDEV_STATE_DONGLE_RESET + 1)
+#define GIRBIL_STATE_WAIT2_RESET (SIRDEV_STATE_DONGLE_RESET + 2)
+#define GIRBIL_STATE_WAIT3_RESET (SIRDEV_STATE_DONGLE_RESET + 3)
+
+static int girbil_reset(struct sir_dev *dev)
+{
+ unsigned state = dev->fsm.substate;
+ unsigned delay = 0;
+ u8 control = GIRBIL_TXEN | GIRBIL_RXEN;
+ int ret = 0;
+
+ switch (state) {
+ case SIRDEV_STATE_DONGLE_RESET:
+ /* Reset dongle */
+ sirdev_set_dtr_rts(dev, TRUE, FALSE);
+ /* Sleep at least 5 ms */
+ delay = 20;
+ state = GIRBIL_STATE_WAIT1_RESET;
+ break;
+
+ case GIRBIL_STATE_WAIT1_RESET:
+ /* Set DTR and clear RTS to enter command mode */
+ sirdev_set_dtr_rts(dev, FALSE, TRUE);
+ delay = 20;
+ state = GIRBIL_STATE_WAIT2_RESET;
+ break;
+
+ case GIRBIL_STATE_WAIT2_RESET:
+ /* Write control byte */
+ sirdev_raw_write(dev, &control, 1);
+ delay = 20;
+ state = GIRBIL_STATE_WAIT3_RESET;
+ break;
+
+ case GIRBIL_STATE_WAIT3_RESET:
+ /* Go back to normal mode */
+ sirdev_set_dtr_rts(dev, TRUE, TRUE);
+ dev->speed = 9600;
+ break;
+
+ default:
+ net_err_ratelimited("%s(), undefined state %d\n",
+ __func__, state);
+ ret = -1;
+ break;
+ }
+ dev->fsm.substate = state;
+ return (delay > 0) ? delay : 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 */
+
+module_init(girbil_sir_init);
+module_exit(girbil_sir_cleanup);