URL https://opencores.org/ocsvn/or1k/or1k/trunk

Subversion Repositories or1k

[/] [or1k/] [tags/] [MW_0_8_9PRE7/] [mw/] [src/] [drivers/] [mou_gpm.c] - Blame information for rev 673

Go to most recent revision | Details | Compare with Previous | View Log


/*
 * Copyright (c) 1999 Greg Haerr <greg@censoft.com>
 * Copyright (c) 1999 Alex Holden
 * Copyright (c) 1991 David I. Bell
 * Permission is granted to use, distribute, or modify this source,
 * provided that this copyright notice remains intact.
 *
 * GPM Mouse Driver
 *
 * Rewritten to understand the Logitech Mouseman protocol which GPM
 * produces on /dev/gpmdata when in repeater mode. Remember to start
 * GPM with the -R flag or it won't work. (gpm -R -t ps2)
 *
 */
#include <stdio.h>
#include <errno.h>
#include <unistd.h>
#include <fcntl.h>
#include "device.h"
 
#define SCALE           3       /* default scaling factor for acceleration */
#define THRESH          5       /* default threshhold for acceleration */
 
#define GPM_DEV_FILE    "/dev/gpmdata"
 
static int      GPM_Open(MOUSEDEVICE *pmd);
static void     GPM_Close(void);
static int      GPM_GetButtonInfo(void);
static void     MOU_GetDefaultAccel(int *pscale,int *pthresh);
static int      GPM_Read(MWCOORD *dx, MWCOORD *dy, MWCOORD *dz, int *bp);
 
MOUSEDEVICE mousedev = {
        GPM_Open,
        GPM_Close,
        GPM_GetButtonInfo,
        MOU_GetDefaultAccel,
        GPM_Read,
        NULL
};
 
static int mouse_fd;
 
/*
 * Open up the mouse device.
 * Returns the fd if successful, or negative if unsuccessful.
 */
static int
GPM_Open(MOUSEDEVICE *pmd)
{
        mouse_fd = open(GPM_DEV_FILE, O_NONBLOCK);
        if (mouse_fd < 0)
                return -1;
        return mouse_fd;
}
 
/*
 * Close the mouse device.
 */
static void
GPM_Close(void)
{
        if (mouse_fd > 0)
                close(mouse_fd);
        mouse_fd = 0;
}
 
/*
 * Get mouse buttons supported
 */
static int
GPM_GetButtonInfo(void)
{
        return MWBUTTON_L | MWBUTTON_M | MWBUTTON_R;
}
 
/*
 * Get default mouse acceleration settings
 */
static void
MOU_GetDefaultAccel(int *pscale,int *pthresh)
{
        *pscale = SCALE;
        *pthresh = THRESH;
}
 
/*
 * Attempt to read bytes from the mouse and interpret them.
 * Returns -1 on error, 0 if either no bytes were read or not enough
 * was read for a complete state, or 1 if the new state was read.
 * When a new state is read, the current buttons and x and y deltas
 * are returned.  This routine does not block.
 */
static int
GPM_Read(MWCOORD *dx, MWCOORD *dy, MWCOORD *dz, int *bp)
{
        static unsigned char buf[5];
        static int nbytes;
        int n;
 
        while((n = read(mouse_fd, &buf[nbytes], 5 - nbytes))) {
                if(n < 0) {
                        if ((errno == EINTR) || (errno == EAGAIN))
                                return 0;
                        else return -1;
                }
 
                nbytes += n;
 
                if(nbytes == 5) {
                        /* button data matches defines, no conversion*/
                        *bp = (~buf[0]) & 0x07;
                        *dx = (signed char)(buf[1]) + (signed char)(buf[3]);
                        *dy = -((signed char)(buf[2]) + (signed char)(buf[4]));
                        *dz = 0;
                        nbytes = 0;
                        return 1;
                }
        }
        return 0;
}

Line No.	Rev	Author	Line
1	673	markom	`/*`
2			`* Copyright (c) 1999 Greg Haerr <greg@censoft.com>`
3			`* Copyright (c) 1999 Alex Holden`
4			`* Copyright (c) 1991 David I. Bell`
5			`* Permission is granted to use, distribute, or modify this source,`
6			`* provided that this copyright notice remains intact.`
7			`*`
8			`* GPM Mouse Driver`
9			`*`
10			`* Rewritten to understand the Logitech Mouseman protocol which GPM`
11			`* produces on /dev/gpmdata when in repeater mode. Remember to start`
12			`* GPM with the -R flag or it won't work. (gpm -R -t ps2)`
13			`*`
14			`*/`
15			`#include <stdio.h>`
16			`#include <errno.h>`
17			`#include <unistd.h>`
18			`#include <fcntl.h>`
19			`#include "device.h"`
20
21			`#define SCALE 3 /* default scaling factor for acceleration */`
22			`#define THRESH 5 /* default threshhold for acceleration */`
23
24			`#define GPM_DEV_FILE "/dev/gpmdata"`
25
26			`static int GPM_Open(MOUSEDEVICE *pmd);`
27			`static void GPM_Close(void);`
28			`static int GPM_GetButtonInfo(void);`
29			`static void MOU_GetDefaultAccel(int pscale,int pthresh);`
30			`static int GPM_Read(MWCOORD dx, MWCOORD dy, MWCOORD dz, int bp);`
31
32			`MOUSEDEVICE mousedev = {`
33			`GPM_Open,`
34			`GPM_Close,`
35			`GPM_GetButtonInfo,`
36			`MOU_GetDefaultAccel,`
37			`GPM_Read,`
38			`NULL`
39			`};`
40
41			`static int mouse_fd;`
42
43			`/*`
44			`* Open up the mouse device.`
45			`* Returns the fd if successful, or negative if unsuccessful.`
46			`*/`
47			`static int`
48			`GPM_Open(MOUSEDEVICE *pmd)`
49			`{`
50			`mouse_fd = open(GPM_DEV_FILE, O_NONBLOCK);`
51			`if (mouse_fd < 0)`
52			`return -1;`
53			`return mouse_fd;`
54			`}`
55
56			`/*`
57			`* Close the mouse device.`
58			`*/`
59			`static void`
60			`GPM_Close(void)`
61			`{`
62			`if (mouse_fd > 0)`
63			`close(mouse_fd);`
64			`mouse_fd = 0;`
65			`}`
66
67			`/*`
68			`* Get mouse buttons supported`
69			`*/`
70			`static int`
71			`GPM_GetButtonInfo(void)`
72			`{`
73			`return MWBUTTON_L \| MWBUTTON_M \| MWBUTTON_R;`
74			`}`
75
76			`/*`
77			`* Get default mouse acceleration settings`
78			`*/`
79			`static void`
80			`MOU_GetDefaultAccel(int pscale,int pthresh)`
81			`{`
82			`*pscale = SCALE;`
83			`*pthresh = THRESH;`
84			`}`
85
86			`/*`
87			`* Attempt to read bytes from the mouse and interpret them.`
88			`* Returns -1 on error, 0 if either no bytes were read or not enough`
89			`* was read for a complete state, or 1 if the new state was read.`
90			`* When a new state is read, the current buttons and x and y deltas`
91			`* are returned. This routine does not block.`
92			`*/`
93			`static int`
94			`GPM_Read(MWCOORD dx, MWCOORD dy, MWCOORD dz, int bp)`
95			`{`
96			`static unsigned char buf[5];`
97			`static int nbytes;`
98			`int n;`
99
100			`while((n = read(mouse_fd, &buf[nbytes], 5 - nbytes))) {`
101			`if(n < 0) {`
102			`if ((errno == EINTR) \|\| (errno == EAGAIN))`
103			`return 0;`
104			`else return -1;`
105			`}`
106
107			`nbytes += n;`
108
109			`if(nbytes == 5) {`
110			`/* button data matches defines, no conversion*/`
111			`*bp = (~buf[0]) & 0x07;`
112			`*dx = (signed char)(buf[1]) + (signed char)(buf[3]);`
113			`*dy = -((signed char)(buf[2]) + (signed char)(buf[4]));`
114			`*dz = 0;`
115			`nbytes = 0;`
116			`return 1;`
117			`}`
118			`}`
119			`return 0;`
120			`}`

Browse

Tools

Subversion Repositories or1k

[/] [or1k/] [tags/] [MW_0_8_9PRE7/] [mw/] [src/] [drivers/] [mou_gpm.c] - Blame information for rev 673