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[irda-users] [PATCH] : ir258_mcp2120_driver.diff
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From: Jean T. <jt...@bo...> - 2002-04-19 02:31:54
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ir258_mcp2120_driver.diff :
-------------------------
<Following patch from Felix Tang>
o [FEATURE] Dongle driver for mcp2120/crystal hardware
-----------------------------------------
diff -u -p linux/include/linux/irda.d7.h linux/include/linux/irda.h
--- linux/include/linux/irda.d7.h Wed Apr 10 17:47:58 2002
+++ linux/include/linux/irda.h Wed Apr 10 17:48:24 2002
@@ -67,6 +67,7 @@ typedef enum {
IRDA_AIRPORT_DONGLE = 6,
IRDA_OLD_BELKIN_DONGLE = 7,
IRDA_EP7211_IR = 8,
+ IRDA_MCP2120_DONGLE = 9,
} IRDA_DONGLE;
/* Protocol types to be used for SOCK_DGRAM */
diff -u -p linux/drivers/net/irda/Config.d7.in linux/drivers/net/irda/Config.in
--- linux/drivers/net/irda/Config.d7.in Wed Apr 10 17:46:56 2002
+++ linux/drivers/net/irda/Config.in Wed Apr 10 17:47:26 2002
@@ -13,6 +13,7 @@ if [ "$CONFIG_DONGLE" != "n" ]; then
dep_tristate ' Tekram IrMate 210B dongle' CONFIG_TEKRAM_DONGLE $CONFIG_IRDA
dep_tristate ' Greenwich GIrBIL dongle' CONFIG_GIRBIL_DONGLE $CONFIG_IRDA
dep_tristate ' Parallax LiteLink dongle' CONFIG_LITELINK_DONGLE $CONFIG_IRDA
+ dep_tristate ' Microchip MCP2120' CONFIG_MCP2120_DONGLE $CONFIG_IRDA
dep_tristate ' Old Belkin dongle' CONFIG_OLD_BELKIN_DONGLE $CONFIG_IRDA
if [ "$CONFIG_ARCH_EP7211" = "y" ]; then
dep_tristate ' EP7211 I/R support' CONFIG_EP7211_IR $CONFIG_IRDA
diff -u -p linux/drivers/net/irda/Config.d7.help linux/drivers/net/irda/Config.help
--- linux/drivers/net/irda/Config.d7.help Wed Apr 10 17:49:14 2002
+++ linux/drivers/net/irda/Config.help Wed Apr 10 17:50:03 2002
@@ -138,6 +138,18 @@ CONFIG_LITELINK_DONGLE
used by IrTTY. To activate support for Parallax dongles you will
have to start irattach like this "irattach -d litelink".
+Microchip MCP2120 dongle
+CONFIG_MCP2120_DONGLE
+ Say Y here if you want to build support for the Microchip MCP2120
+ dongle. If you want to compile it as a module, say M here and read
+ <file:Documentation/modules.txt>. The MCP2120 dongle attaches to
+ the normal 9-pin serial port connector, and can currently only be
+ used by IrTTY. To activate support for MCP2120 dongles you will
+ have to insert "irattach -d mcp2120" in the /etc/irda/drivers script.
+
+ You must build this dongle yourself. For more information see:
+ <http://www.eyetap.org/~tangf/irda_sir_linux.html>
+
CONFIG_OLD_BELKIN_DONGLE
Say Y here if you want to build support for the Adaptec Airport 1000
and 2000 dongles. If you want to compile it as a module, say M here
diff -u -p linux/drivers/net/irda/Makefile.d7 linux/drivers/net/irda/Makefile
--- linux/drivers/net/irda/Makefile.d7 Wed Apr 10 17:46:07 2002
+++ linux/drivers/net/irda/Makefile Wed Apr 10 17:46:35 2002
@@ -28,5 +28,6 @@ obj-$(CONFIG_GIRBIL_DONGLE) += girbil.o
obj-$(CONFIG_LITELINK_DONGLE) += litelink.o
obj-$(CONFIG_OLD_BELKIN_DONGLE) += old_belkin.o
obj-$(CONFIG_EP7211_IR) += ep7211_ir.o
+obj-$(CONFIG_MCP2120_DONGLE) += mcp2120.o
include $(TOPDIR)/Rules.make
diff -u -p linux/drivers/net/irda/mcp2120.d7.c linux/drivers/net/irda/mcp2120.c
--- linux/drivers/net/irda/mcp2120.d7.c Wed Apr 10 17:52:54 2002
+++ linux/drivers/net/irda/mcp2120.c Wed Apr 10 17:45:29 2002
@@ -0,0 +1,252 @@
+/*********************************************************************
+ *
+ *
+ * Filename: mcp2120.c
+ * Version: 1.0
+ * Description: Implementation for the MCP2120 (Microchip)
+ * Status: Experimental.
+ * Author: Felix Tang (ta...@ey...)
+ * Created at: Sun Mar 31 19:32:12 EST 2002
+ * Based on code by: Dag Brattli <da...@cs...>
+ *
+ * Copyright (c) 2002 Felix Tang, 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/irmod.h>
+#include <net/irda/irda_device.h>
+#include <net/irda/irtty.h>
+
+static int mcp2120_reset(struct irda_task *task);
+static void mcp2120_open(dongle_t *self, struct qos_info *qos);
+static void mcp2120_close(dongle_t *self);
+static int mcp2120_change_speed(struct irda_task *task);
+
+#define MCP2120_9600 0x87
+#define MCP2120_19200 0x8B
+#define MCP2120_38400 0x85
+#define MCP2120_57600 0x83
+#define MCP2120_115200 0x81
+
+#define MCP2120_COMMIT 0x11
+
+static struct dongle_reg dongle = {
+ Q_NULL,
+ IRDA_MCP2120_DONGLE,
+ mcp2120_open,
+ mcp2120_close,
+ mcp2120_reset,
+ mcp2120_change_speed,
+};
+
+int __init mcp2120_init(void)
+{
+ return irda_device_register_dongle(&dongle);
+}
+
+void mcp2120_cleanup(void)
+{
+ irda_device_unregister_dongle(&dongle);
+}
+
+static void mcp2120_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 = 0x01;
+
+ MOD_INC_USE_COUNT;
+}
+
+static void mcp2120_close(dongle_t *self)
+{
+ /* Power off dongle */
+ /* reset and inhibit mcp2120 */
+ self->set_dtr_rts(self->dev, TRUE, TRUE);
+ //self->set_dtr_rts(self->dev, FALSE, FALSE);
+
+ MOD_DEC_USE_COUNT;
+}
+
+/*
+ * Function mcp2120_change_speed (dev, speed)
+ *
+ * Set the speed for the MCP2120.
+ *
+ */
+static int mcp2120_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 */
+ //printk("Dmcp2120_change_speed irda_task_init\n");
+ if (irda_task_execute(self, mcp2120_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:
+ /* Set DTR to enter command mode */
+ self->set_dtr_rts(self->dev, TRUE, FALSE);
+ udelay(500);
+
+ switch (speed) {
+ case 9600:
+ default:
+ control[0] = MCP2120_9600;
+ //printk("mcp2120 9600\n");
+ break;
+ case 19200:
+ control[0] = MCP2120_19200;
+ //printk("mcp2120 19200\n");
+ break;
+ case 34800:
+ control[0] = MCP2120_38400;
+ //printk("mcp2120 38400\n");
+ break;
+ case 57600:
+ control[0] = MCP2120_57600;
+ //printk("mcp2120 57600\n");
+ break;
+ case 115200:
+ control[0] = MCP2120_115200;
+ //printk("mcp2120 115200\n");
+ break;
+ }
+ control[1] = MCP2120_COMMIT;
+
+ /* Write control bytes */
+ self->write(self->dev, control, 2);
+
+ irda_task_next_state(task, IRDA_TASK_WAIT);
+ ret = MSECS_TO_JIFFIES(100);
+ //printk("mcp2120_change_speed irda_child_done\n");
+ break;
+ case IRDA_TASK_WAIT:
+ /* Go back to normal mode */
+ self->set_dtr_rts(self->dev, FALSE, FALSE);
+ irda_task_next_state(task, IRDA_TASK_DONE);
+ self->speed_task = NULL;
+ //printk("mcp2120_change_speed irda_task_wait\n");
+ 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 mcp2120_reset (driver)
+ *
+ * This function resets the mcp2120 dongle.
+ *
+ * Info: -set RTS to reset mcp2120
+ * -set DTR to set mcp2120 software command mode
+ * -mcp2120 defaults to 9600 baud after reset
+ *
+ * Algorithm:
+ * 0. Set RTS to reset mcp2120.
+ * 1. Clear RTS and wait for device reset timer of 30 ms (max).
+ *
+ */
+
+
+static int mcp2120_reset(struct irda_task *task)
+{
+ dongle_t *self = (dongle_t *) task->instance;
+ int ret = 0;
+
+ self->reset_task = task;
+
+ switch (task->state) {
+ case IRDA_TASK_INIT:
+ //printk("mcp2120_reset irda_task_init\n");
+ /* Reset dongle by setting RTS*/
+ 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:
+ //printk("mcp2120_reset irda_task_wait1\n");
+ /* clear RTS and wait for at least 30 ms. */
+ self->set_dtr_rts(self->dev, FALSE, FALSE);
+ irda_task_next_state(task, IRDA_TASK_WAIT2);
+ ret = MSECS_TO_JIFFIES(50);
+ break;
+ case IRDA_TASK_WAIT2:
+ //printk("mcp2120_reset irda_task_wait2\n");
+ /* Go back to normal mode */
+ self->set_dtr_rts(self->dev, FALSE, FALSE);
+ 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;
+}
+
+#ifdef MODULE
+MODULE_AUTHOR("Felix Tang <ta...@ey...>");
+MODULE_DESCRIPTION("Microchip MCP2120");
+MODULE_LICENSE("GPL");
+
+
+/*
+ * Function init_module (void)
+ *
+ * Initialize MCP2120 module
+ *
+ */
+int init_module(void)
+{
+ return mcp2120_init();
+}
+
+/*
+ * Function cleanup_module (void)
+ *
+ * Cleanup MCP2120 module
+ *
+ */
+void cleanup_module(void)
+{
+ mcp2120_cleanup();
+}
+#endif /* MODULE */
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