Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
这个提交包含在：
Linus Torvalds
230
drivers/net/irda/mcp2120-sir.c
普通文件
230
drivers/net/irda/mcp2120-sir.c
普通文件
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/*********************************************************************
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*
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*
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* Filename: mcp2120.c
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* Version: 1.0
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* Description: Implementation for the MCP2120 (Microchip)
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* Status: Experimental.
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* Author: Felix Tang (tangf@eyetap.org)
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* Created at: Sun Mar 31 19:32:12 EST 2002
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* Based on code by: Dag Brattli <dagb@cs.uit.no>
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*
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* Copyright (c) 2002 Felix Tang, All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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********************************************************************/
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#include <linux/module.h>
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#include <linux/delay.h>
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#include <linux/init.h>
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#include <net/irda/irda.h>
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#include "sir-dev.h"
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static int mcp2120_reset(struct sir_dev *dev);
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static int mcp2120_open(struct sir_dev *dev);
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static int mcp2120_close(struct sir_dev *dev);
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static int mcp2120_change_speed(struct sir_dev *dev, unsigned speed);
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#define MCP2120_9600 0x87
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#define MCP2120_19200 0x8B
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#define MCP2120_38400 0x85
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#define MCP2120_57600 0x83
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#define MCP2120_115200 0x81
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#define MCP2120_COMMIT 0x11
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static struct dongle_driver mcp2120 = {
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.owner = THIS_MODULE,
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.driver_name = "Microchip MCP2120",
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.type = IRDA_MCP2120_DONGLE,
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.open = mcp2120_open,
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.close = mcp2120_close,
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.reset = mcp2120_reset,
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.set_speed = mcp2120_change_speed,
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};
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static int __init mcp2120_sir_init(void)
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{
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return irda_register_dongle(&mcp2120);
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}
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static void __exit mcp2120_sir_cleanup(void)
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{
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irda_unregister_dongle(&mcp2120);
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}
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static int mcp2120_open(struct sir_dev *dev)
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{
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struct qos_info *qos = &dev->qos;
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IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
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/* seems no explicit power-on required here and reset switching it on anyway */
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qos->baud_rate.bits &= IR_9600|IR_19200|IR_38400|IR_57600|IR_115200;
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qos->min_turn_time.bits = 0x01;
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irda_qos_bits_to_value(qos);
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return 0;
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}
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static int mcp2120_close(struct sir_dev *dev)
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{
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IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
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/* Power off dongle */
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/* reset and inhibit mcp2120 */
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sirdev_set_dtr_rts(dev, TRUE, TRUE);
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// sirdev_set_dtr_rts(dev, FALSE, FALSE);
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return 0;
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}
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/*
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* Function mcp2120_change_speed (dev, speed)
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*
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* Set the speed for the MCP2120.
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*
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*/
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#define MCP2120_STATE_WAIT_SPEED (SIRDEV_STATE_DONGLE_SPEED+1)
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static int mcp2120_change_speed(struct sir_dev *dev, unsigned speed)
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{
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unsigned state = dev->fsm.substate;
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unsigned delay = 0;
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u8 control[2];
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static int ret = 0;
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IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
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switch (state) {
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case SIRDEV_STATE_DONGLE_SPEED:
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/* Set DTR to enter command mode */
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sirdev_set_dtr_rts(dev, TRUE, FALSE);
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udelay(500);
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ret = 0;
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switch (speed) {
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default:
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speed = 9600;
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ret = -EINVAL;
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/* fall through */
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case 9600:
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control[0] = MCP2120_9600;
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//printk("mcp2120 9600\n");
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break;
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case 19200:
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control[0] = MCP2120_19200;
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//printk("mcp2120 19200\n");
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break;
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case 34800:
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control[0] = MCP2120_38400;
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//printk("mcp2120 38400\n");
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break;
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case 57600:
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control[0] = MCP2120_57600;
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//printk("mcp2120 57600\n");
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break;
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case 115200:
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control[0] = MCP2120_115200;
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//printk("mcp2120 115200\n");
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break;
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}
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control[1] = MCP2120_COMMIT;
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/* Write control bytes */
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sirdev_raw_write(dev, control, 2);
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dev->speed = speed;
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state = MCP2120_STATE_WAIT_SPEED;
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delay = 100;
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//printk("mcp2120_change_speed: dongle_speed\n");
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break;
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case MCP2120_STATE_WAIT_SPEED:
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/* Go back to normal mode */
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sirdev_set_dtr_rts(dev, FALSE, FALSE);
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//printk("mcp2120_change_speed: mcp_wait\n");
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break;
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default:
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IRDA_ERROR("%s(), undefine state %d\n", __FUNCTION__, state);
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ret = -EINVAL;
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break;
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}
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dev->fsm.substate = state;
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return (delay > 0) ? delay : ret;
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}
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/*
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* Function mcp2120_reset (driver)
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*
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* This function resets the mcp2120 dongle.
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*
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* Info: -set RTS to reset mcp2120
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* -set DTR to set mcp2120 software command mode
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* -mcp2120 defaults to 9600 baud after reset
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*
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* Algorithm:
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* 0. Set RTS to reset mcp2120.
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* 1. Clear RTS and wait for device reset timer of 30 ms (max).
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*
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*/
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#define MCP2120_STATE_WAIT1_RESET (SIRDEV_STATE_DONGLE_RESET+1)
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#define MCP2120_STATE_WAIT2_RESET (SIRDEV_STATE_DONGLE_RESET+2)
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static int mcp2120_reset(struct sir_dev *dev)
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{
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unsigned state = dev->fsm.substate;
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unsigned delay = 0;
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int ret = 0;
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IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
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switch (state) {
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case SIRDEV_STATE_DONGLE_RESET:
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//printk("mcp2120_reset: dongle_reset\n");
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/* Reset dongle by setting RTS*/
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sirdev_set_dtr_rts(dev, TRUE, TRUE);
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state = MCP2120_STATE_WAIT1_RESET;
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delay = 50;
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break;
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case MCP2120_STATE_WAIT1_RESET:
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//printk("mcp2120_reset: mcp2120_wait1\n");
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/* clear RTS and wait for at least 30 ms. */
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sirdev_set_dtr_rts(dev, FALSE, FALSE);
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state = MCP2120_STATE_WAIT2_RESET;
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delay = 50;
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break;
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case MCP2120_STATE_WAIT2_RESET:
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//printk("mcp2120_reset mcp2120_wait2\n");
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/* Go back to normal mode */
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sirdev_set_dtr_rts(dev, FALSE, FALSE);
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break;
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default:
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IRDA_ERROR("%s(), undefined state %d\n", __FUNCTION__, state);
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ret = -EINVAL;
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break;
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}
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dev->fsm.substate = state;
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return (delay > 0) ? delay : ret;
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}
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MODULE_AUTHOR("Felix Tang <tangf@eyetap.org>");
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MODULE_DESCRIPTION("Microchip MCP2120");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("irda-dongle-9"); /* IRDA_MCP2120_DONGLE */
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module_init(mcp2120_sir_init);
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module_exit(mcp2120_sir_cleanup);
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