RE: [PATCH 2/2] misc: add real function open/read/write/ioctl/close for moxa_serial_io driver

From: Jimmy Chen (???)
Date: Sun Apr 24 2011 - 22:36:16 EST

From: Jimmy Chen <jimmy.chen@xxxxxxxx>

Add real function and GPL license.

Signed-off-by: Jimmy Chen <jimmy.chen@xxxxxxxx>
---
diff --git a/drivers/misc/moxa_serial_io.c b/drivers/misc/moxa_serial_io.c
index df454c8..e69de29 100644
--- a/drivers/misc/moxa_serial_io.c
+++ b/drivers/misc/moxa_serial_io.c
@@ -1,609 +0,0 @@
-/*
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-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/errno.h>
-#include <linux/fs.h>
-#include <linux/mm.h>
-#include <linux/miscdevice.h>
-#include <linux/interrupt.h>
-#include <linux/sched.h>
-#include <asm/uaccess.h>
-#include <asm/io.h>
-#include "moxa_serial_io.h"
-
-#define MOXA_IO_MINOR 255
-#define BASEPORT 0x800
-#define MOXA_SERIAL_IO_VERSION "v0.1.0"
-/*
- * DIO file operaiton function call
-*/
-#define MAX_DIO 3
-
-#define DIO_INPUT 1
-#define DIO_OUTPUT 0
-#define DIO_HIGH 1
-#define DIO_LOW 0
-#define IOCTL_DIO_GET_MODE 1
-#define IOCTL_DIO_SET_MODE 2
-#define IOCTL_DIO_GET_DATA 3
-#define IOCTL_DIO_SET_DATA 4
-#define IOCTL_SET_DOUT 15
-#define IOCTL_GET_DOUT 16
-#define IOCTL_GET_DIN 17
-
-#define MOXA 0x400
-#define MOXA_SET_OP_MODE (MOXA + 66)
-#define MOXA_GET_OP_MODE (MOXA + 67)
-
-#define RS232_MODE 0
-#define RS485_2WIRE_MODE 1
-#define RS422_MODE 2
-#define RS485_4WIRE_MODE 3
-
-
-struct dio_set_struct {
- int io_number;
- int mode_data; // 1 for input, 0 for output, 1 for high, 0 for low
-};
-
-static unsigned char do_state_keep=0xff;
-static unsigned int counter = 0;
-static char string [128];
-unsigned char keep_opmode=0x00;
-
-/* open function - called when the "file" /dev/mxsio is opened in userspace */
-static int io_open (struct inode *inode, struct file *file) {
- return 0;
-}
-
-/* close function - called when the "file" /dev/mxsio is closed in userspace */
-static int io_release (struct inode *inode, struct file *file) {
- return 0;
-}
-
-/* read function called when from /dev/mxsio is read */
-static ssize_t io_read (struct file *file, char *buf,
- size_t count, loff_t *ppos) {
- int len, err;
-
- if( counter <= 0 )
- return 0;
- err = copy_to_user(buf,string,counter);
- if (err != 0)
- return -EFAULT;
- len = counter;
- counter = 0;
- return len;
-}
-
-/* write function called when to /dev/mxsio is written */
-static ssize_t io_write (struct file *file, const char *buf,
- size_t count, loff_t *ppos) {
- int err;
- err = copy_from_user(string,buf,count);
-
- if(count < 3)
- return -EINVAL;
- if (err != 0)
- return -EFAULT;
-
- outb((unsigned char)string[2], (((unsigned short)string[0])<<8)|((unsigned short)string[1]));
-
- counter += count;
- return count;
-}
-
-/* ioctl - I/O control */
-static int io_ioctl(struct inode *inode, struct file *file,unsigned int cmd, unsigned long arg) {
- struct dio_set_struct set;
- unsigned char di_state;
- unsigned char port,opmode,val;
-
- switch ( cmd ) {
- case IOCTL_SET_DOUT :
- if ( copy_from_user(&set, (struct dio_set_struct *)arg, sizeof(struct dio_set_struct)) )
- return -EFAULT;
- if ( set.io_number < 0 || set.io_number >= MAX_DIO )
- return -EINVAL;
- if ( set.mode_data == DIO_HIGH )
- do_state_keep |= (1<<set.io_number);
- else if ( set.mode_data == DIO_LOW )
- do_state_keep &= ~(1<<set.io_number);
- else
- return -EINVAL;
- outb(do_state_keep,BASEPORT+5);
- //printk("%s,%d :BASEPORT+5:%x\n", __FUNCTION__, __LINE__,(unsigned long)inb(BASEPORT+5));
- break;
- case IOCTL_GET_DOUT :
- case IOCTL_GET_DIN :
- if ( copy_from_user(&set, (struct dio_set_struct *)arg, sizeof(struct dio_set_struct)) )
- return -EFAULT;
- if ( set.io_number == -1 ) { // to get all port
- if ( cmd == IOCTL_GET_DOUT )
- set.mode_data = do_state_keep & 0xf;
- else
- set.mode_data = (inb(BASEPORT+5)>>4) & 0xf;
- goto ioctl_get_label;
- }
- if ( set.io_number < 0 || set.io_number >= MAX_DIO )
- return -EINVAL;
- if ( cmd == IOCTL_GET_DOUT ) {
- if ( do_state_keep & (1<<set.io_number) )
- set.mode_data = 1;
- else
- set.mode_data = 0;
- } else {
- di_state = inb(BASEPORT+5)>>4;
- if ( di_state & (1<<set.io_number) )
- set.mode_data = 1;
- else
- set.mode_data = 0;
- }
-ioctl_get_label:
- if ( copy_to_user((struct dio_set_struct *)arg, &set, sizeof(struct dio_set_struct)) )
- return -EFAULT;
- break;
- case MOXA_SET_OP_MODE:
- copy_from_user(&opmode,(unsigned char *)arg,sizeof(unsigned char));
- port = opmode >> 4 ;
- opmode = opmode & 0xf;
-
- if ( opmode != RS232_MODE && opmode != RS485_2WIRE_MODE && opmode != RS422_MODE && opmode != RS485_4WIRE_MODE && port > 1)
- return -EFAULT;
-
- val=inb(BASEPORT+4)&(~(((unsigned char)0xe)<<(4*port)));
-
- switch(opmode){
- case RS232_MODE:
- val|=(((unsigned char)0x8)<<(4*port));
- break;
- case RS485_2WIRE_MODE:
- val|=(((unsigned char)0x2)<<(4*port));
- break;
- case RS422_MODE:
- case RS485_4WIRE_MODE:
- val|=(((unsigned char)0x4)<<(4*port));
- break;
- }
-
- outb(val,BASEPORT+4);
-
- keep_opmode &= ~(((unsigned char)0xf)<<(port*4));
- keep_opmode |= opmode<<(port*4);
-
- superio_enter_config();
- superio_set_logic_device((u8)(port+1));
- if(opmode == RS232_MODE){
- val=superio_get_reg(0xf0)& 0x7f;
- }else{
- val=superio_get_reg(0xf0)| 0x80;
- }
- superio_set_reg(val , 0xf0);
-
- break;
-
- case MOXA_GET_OP_MODE:
- copy_from_user(&port,(unsigned char *)arg,sizeof(unsigned char));
- if(port>1)return -EINVAL;
- opmode=(keep_opmode>>(port*4))& 0xf;
- copy_to_user((unsigned char*)arg, &opmode, sizeof(unsigned char));
-
- break;
- default:
- return -EINVAL;
- }
- return 0;
-}
-
-
-/* define which file operations are supported */
-struct file_operations io_fops = {
- .owner = THIS_MODULE,
- .llseek = NULL,
- .read = io_read,
- .write = io_write,
- .readdir = NULL,
- .poll = NULL,
- .ioctl = io_ioctl,
- .mmap = NULL,
- .open = io_open,
- .flush = NULL,
- .release = io_release,
- .fsync = NULL,
- .fasync = NULL,
- .lock = NULL,
-};
-
-/* register as misc driver */
-static struct miscdevice dio_miscdev = {
- .minor = MOXA_IO_MINOR,
- .name = "mxsio",
- .fops = &io_fops,
-};
-
-
-/* initialize module (and interrupt) */
-static int __init io_init_module (void) {
- unsigned char val;
- printk("initializing MOXA SERIAL IO module\n");
-
- if ( misc_register(&dio_miscdev)!=0 ) {
- printk("Moxa serial io driver: Register misc fail !\n");
- return -ENOMEM;
- }
-
- outb(do_state_keep, BASEPORT+5);
- outb(0x00, BASEPORT);
-
- /* set default serial mode to RS232 */
- outb(0x88, BASEPORT+4);
-
- superio_enter_config();
- superio_set_logic_device(1);
- val=superio_get_reg(0xf0)&0x7f;
- superio_set_reg(val,0xf0);
-
- superio_enter_config();
- superio_set_logic_device(2);
- val=superio_get_reg(0xf0)&0x7f;
- superio_set_reg(val,0xf0);
-
- printk(KERN_INFO "Moxa V2100 serial io driver, version " MOXA_SERIAL_IO_VERSION ", "
- "init OK\n");
- return 0;
-}
-
-// close and cleanup module
-static void __exit io_cleanup_module (void) {
- printk("cleaning up module\n");
- misc_deregister(&dio_miscdev);
-}
-
-module_init(io_init_module);
-module_exit(io_cleanup_module);
-MODULE_AUTHOR("Jimmy.Chen@xxxxxxxx");
-MODULE_LICENSE("GPL");
-MODULE_DESCRIPTION("MOXA SERIAL IO module");
diff --git a/drivers/misc/moxa_serial_io.h b/drivers/misc/moxa_serial_io.h
index 5d14193..e69de29 100644
--- a/drivers/misc/moxa_serial_io.h
+++ b/drivers/misc/moxa_serial_io.h
@@ -1,389 +0,0 @@
-/*
- * GNU GENERAL PUBLIC LICENSE
- * Version 2, June 1991
- *
- * Copyright (C) 1989, 1991 Free Software Foundation, Inc.
- * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- * Everyone is permitted to copy and distribute verbatim copies
- * of this license document, but changing it is not allowed.
- *
- * Preamble
- *
- * The licenses for most software are designed to take away your
- * freedom to share and change it. By contrast, the GNU General Public
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- * the GNU Library General Public License instead.) You can apply it to
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- * How to Apply These Terms to Your New Programs
- *
- * If you develop a new program, and you want it to be of the greatest
- * possible use to the public, the best way to achieve this is to make it
- * free software which everyone can redistribute and change under these terms.
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- * to attach them to the start of each source file to most effectively
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- * Copyright (C) 19yy <name of author>
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- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
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- * `Gnomovision' (which makes passes at compilers) written by James Hacker.
- *
- * <signature of Ty Coon>, 1 April 1989
- * Ty Coon, President of Vice
- *
- * This General Public License does not permit incorporating your program into
- * proprietary programs. If your program is a subroutine library, you may
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- * library. If this is what you want to do, use the GNU Library General
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- */
-
-#ifndef __X86__SUPERIO__
-#define __X86__SUPERIO__
-
-#define SUPERIO_CONFIG_PORT 0x2e
-
-unsigned char superio_get_reg(u8 val) {
- outb (val, SUPERIO_CONFIG_PORT);
- outb( 0x80,0xeb); // a Small delay
- val = inb (SUPERIO_CONFIG_PORT+1);
- outb( 0x80,0xeb); // a Small delay
- return val;
-}
-
-void superio_set_reg(u8 val,u8 index) {
- outb (index, SUPERIO_CONFIG_PORT);
- outb( 0x80, 0xeb); // a Small delay
- outb (val, (SUPERIO_CONFIG_PORT+1));
- outb(0x80, 0xeb); // a Small delay
-}
-
-void superio_set_logic_device(u8 val) {
- superio_set_reg(val, 0x07);
- outb( 0x80, 0xeb); // a Small delay
-}
-
-void superio_enter_config(void) {
-#if defined(DA681)
- outb (0x87, SUPERIO_CONFIG_PORT);
- outb(0x80, 0xeb); // a Small delay
- outb (0x87, SUPERIO_CONFIG_PORT);
- outb(0x80, 0xeb); // a Small delay
-#elif defined(V21XX)
- outb (0x87, SUPERIO_CONFIG_PORT);
- outb (0x01, SUPERIO_CONFIG_PORT);
- outb (0x55, SUPERIO_CONFIG_PORT);
- outb (0x55, SUPERIO_CONFIG_PORT);
-#endif
-}
-
-void superio_exit_config(void) {
- outb(0x02, SUPERIO_CONFIG_PORT);
- outb( 0x80, 0xeb); // a Small delay
- outb(0x02, SUPERIO_CONFIG_PORT+1);
-}
-
-#endif //__X86__SUPERIO__
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