Re: bytes from mouse

From: Vojtech Pavlik
Date: Tue Jul 27 2004 - 14:07:15 EST

On Tue, Jul 27, 2004 at 12:40:50PM -0300, Maikon Bueno wrote:

> Hi all,
> In the follow code, I try to get the bytes from the mouse, but the
> bytes that I got are always either 0 or -128, in any state of mouse
> (with or without pressed buttons).
> I'm using COM1 and I read the bytes from the 0x3f8 port.
> Am I reading the values from the correct address? Is there other way to do that?
>
> Thanks.

How about

modprobe serport
modprobe sermouse
inputattach --msc /dev/ttyS0 &

> --------------------------
>
>
>
> #define MODULE
> #define __KERNEL__
>
> #include<linux/ioport.h>
> #include <linux/config.h>
>
> #include <linux/module.h>
>
> #include<linux/sched.h>
> #include<linux/poll.h>
> #include<linux/interrupt.h>
> #include<linux/miscdevice.h>
> #include<linux/init.h>
>
> #include <linux/kernel.h>
> #include<linux/slab.h>
> #include <linux/fs.h>
> #include <linux/errno.h>
> #include <linux/types.h>
> #include <linux/proc_fs.h>
> #include <linux/fcntl.h>
> #include <linux/devfs_fs_kernel.h>
>
> #include <linux/string.h>
> #include <linux/unistd.h>
> #include <asm/system.h>
> #include <asm/io.h>
> #include <asm/irq.h>
> #define PORT 0x3f8 //COM1
> #define LCR 3
> #define MSB 1
> #define LSB 0
> #define FCR 2
> #define SCR 7
>
> #define OURMOUSE_BASE 0x300
> #define OURMOUSE_MINOR 1
> #define OURMOUSE_MAJOR 56
> #define MOUSE_IRQ 4 //COM1
>
> static int mouse_users = 0;
> static int mouse_dx = 0;
> static int mouse_dy = 0;
> static int mouse_event = 0;
> static int mouse_buttons = 0;
> static int mouse_intr = MOUSE_IRQ;
> static int interrupt_count=0;
>
> static struct wait_queue *mouse_wait;
> static spinlock_t mouse_lock = SPIN_LOCK_UNLOCKED;
> static devfs_handle_t ourmouse_dir;
> static devfs_handle_t ourmouse_dev;
>
> static int ourmouse_open(struct inode *inode, struct file *file);
> static int ourmouse_close(struct inode *inode,struct file *file);
> static void ourmouse_interrupt(int irq, void *dev_id, struct pt_regs *regs);
> static unsigned int mouse_poll(struct file *file, poll_table *wait);
> static int enable_irq_interrupt();
>
> static int bufferin;
> static int bufferout;
> static char buffer[1024];
> static unsigned interrupt_enabled = 0;
>
> MODULE_LICENSE("GPL");
> MODULE_AUTHOR("OURMOUSE");
>
> char ourmouse_str[] = "Hi Baby!\n ";
>
> ssize_t ourmouse_read(struct file *filp , char *buf,
> size_t count, loff_t *offp)
> {
> struct inode *inode = filp->f_dentry->d_inode;
> int minor = MINOR(inode->i_rdev);
> char *txt;
>
> if (filp->private_data) {
> txt = filp->private_data;
> } else {
> txt = ourmouse_str;
> }
> if (count > strlen(txt)) count = strlen(txt);
> copy_to_user(buf, txt, count);
> *offp += count;
> return count;
> }
>
> struct file_operations ourmouse_fops = {
> read: ourmouse_read,
> open: ourmouse_open,
> release: ourmouse_close,
> };
>
> int init_module(void){
> printk("<1> initing\n");
> if(check_region(OURMOUSE_BASE, 3))
> return -ENODEV;
> request_region(OURMOUSE_BASE, 3,"Ourmouse");
>
> devfs_register_chrdev(OURMOUSE_MAJOR,"Ourmouse",&ourmouse_fops);
> ourmouse_dir = devfs_mk_dir(NULL,"Ourmouse", NULL);
> if(ourmouse_dir == NULL){
> printk("<1> Couldn't make the Ourmouse's dir\n");
> }
> ourmouse_dev = devfs_register(ourmouse_dir,
> "Ourmouse",DEVFS_FL_NONE,OURMOUSE_MAJOR,OURMOUSE_MINOR, S_IFCHR |
> S_IRUGO,&ourmouse_fops, NULL);
> if (ourmouse_dev == NULL){
> printk("<1> Couldn't register Ourmouse\n");
> }
>
> interrupt_enabled=!enable_irq_interrupt();
> if (!interrupt_enabled)
> return -EBUSY;
>
> return 0;
> }
>
> void cleanup_module(void){
> release_region(OURMOUSE_BASE, 3);
> devfs_unregister(ourmouse_dev);
> free_irq(mouse_intr, NULL);
> printk("<1> Bye %i\n",interrupt_count);
> }
>
> static int ourmouse_open(struct inode *inode, struct file *file)
> {
> int err = 0;
> if(mouse_users++)
> return 0;
> if(!interrupt_enabled)
> {
> mouse_users--;
> return -EBUSY;
> }
>
> mouse_dx = 0;
> mouse_dy = 0;
> mouse_buttons = 0;
> mouse_event = 0;
> MOD_INC_USE_COUNT;
>
> return 0;
> }
>
> static int ourmouse_close(struct inode *inode,struct file *file)
> {
> if(--mouse_users)
> return 0;
> MOD_DEC_USE_COUNT;
> return 0;
> }
>
> static void ourmouse_interrupt(int irq, void *dev_id, struct pt_regs *regs)
> {
> //interrupt_count++;
>
> int i;
> do {
> i = inb(PORT + 5);
> if (i & 1) {
> buffer[bufferin] = inb(PORT);
> printk("<1> Byte %i: %i\n",bufferin,buffer[bufferin]);
> bufferin++;
> if (bufferin == 1024) bufferin = 0;
> }
> }while (i & 1);
>
> }
>
> static unsigned int mouse_poll(struct file *file, poll_table *wait)
> {
> return 0;
> }
>
> static int enable_irq_interrupt()
> {
> unsigned long flags;
> int i;
> bufferin = 0;
> bufferout = 0;
> save_flags(flags); cli();
> i=request_irq(mouse_intr,ourmouse_interrupt,SA_INTERRUPT,"Ourmouse",NULL);
> if(i) {
> restore_flags(flags);
> return i;
> }
> outb(0,PORT + 1); // Turn off interrupts - Port1
> outb(0,PORT + 1); // Disable interrupts - bit 0 ->0
> outb(0x80,PORT + 3); // enable DLAB - bit 7 ->1
> outb(0x0C,PORT + 0); // Set Divisor LSB
> outb(0x00,PORT + 1); // Set Divisor MSB
> outb(0x03,PORT + 3); // 8 Bits, No Parity, 1 Stop Bit
> outb(0xC7,PORT + 2); // Enable FIFO if UART is 16500+
> outb(0x0B,PORT + 4); // Turn on DTR, RTS, and OUT2
> outb(0x01,PORT + 1); // Interrupt when data received
> printk("<1> sioEnable --ok ... irq: %d\n", mouse_intr);
> restore_flags(flags);
> return 0;
>
> }
> -
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--
Vojtech Pavlik
SuSE Labs, SuSE CR
-
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