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[/] [or1k_old/] [trunk/] [rc203soc/] [sw/] [uClinux/] [drivers/] [char/] [lcdtxt.c] - Blame information for rev 1765

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/*****************************************************************************/
 
/*
 *      lcdtxt.c -- driver for a text based LCD display
 *
 *      (C) Copyright 2000, greg Ungerer (gerg@moreton.com.au)
 */
 
/*****************************************************************************/
 
#include <linux/config.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/fs.h>
#include <linux/mm.h>
#include <linux/delay.h>
#include <asm/param.h>
#include <asm/coldfire.h>
#include <asm/mcfsim.h>
 
/*****************************************************************************/
 
/*
 *      Define driver major number.
 */
#define LCDTXT_MAJOR    120
 
/*
 *      Define LCD hardware address.
 */
#define LCDTXT_ADDR     0x30800000
 
/*****************************************************************************/
 
int lcdtxt_open(struct inode *inode, struct file *filp)
{
#if 0
        printk("lcdtxt_open()\n");
#endif
 
        return(0);
}
 
/*****************************************************************************/
 
void lcdtxt_release(struct inode *inode, struct file *filp)
{
#if 0
        printk("lcdtxt_close()\n");
#endif
}
 
/*****************************************************************************/
 
int lcdtxt_write(struct inode *inode, struct file *filp, const char *buf, int count)
{
        volatile char   *lcdp;
        char            *dp;
        int             num;
 
#if 0
        printk("lcdtxt_write(buf=%x,count=%d)\n", (int) buf, count);
#endif
 
        dp = (char *) buf;
        lcdp = (volatile char *) LCDTXT_ADDR;
 
        for (num = count; (num >= 0); num--) {
                *lcdp = get_user(dp++);
                udelay(1);
        }
 
        return(count);
}
 
/*****************************************************************************/
 
int lcdtxt_ioctl(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg)
{
        int     rc = 0;
 
#if 0
        switch (cmd) {
        default:
                rc = -EINVAL;
                break;
        }
#endif
 
        return(rc);
}
 
/*****************************************************************************/
 
/*
 *      Exported file operations structure for driver...
 */
 
struct file_operations  lcdtxt_fops = {
        NULL,           /* lseek */
        NULL,           /* read */
        lcdtxt_write,   /* write */
        NULL,           /* readdir */
        NULL,           /* poll */
        lcdtxt_ioctl,   /* ioctl */
        NULL,           /* mmap */
        lcdtxt_open,    /* open */
        lcdtxt_release, /* release */
        NULL,           /* fsync */
        NULL,           /* fasync */
        NULL,           /* check_media_change */
        NULL            /* revalidate */
};
 
/*****************************************************************************/
 
void lcdtxt_init(void)
{
        int     rc;
 
        /* Register lcdtxt as character device */
        rc = register_chrdev(LCDTXT_MAJOR, "lcdtxt", &lcdtxt_fops);
        if (rc < 0) {
                printk(KERN_WARNING "LCDTXT: can't get major %d\n",
                        LCDTXT_MAJOR);
                return;
        }
 
        printk("LCDTXT: Copyright (C) 2000, Greg Ungerer "
                "(gerg@moreton.com.au)\n");
 
#if 0
        /* Setup CS4 for our external hardware */
#ifdef CONFIG_OLDMASK
        *((volatile unsigned short *) (MCF_MBAR + MCFSIM_CSMR4)) = 0x0001;
        *((volatile unsigned short *) (MCF_MBAR + MCFSIM_CSCR4)) = 0x3d40;
#else
        *((volatile unsigned short *) (MCF_MBAR + MCFSIM_CSAR4)) = 0x30c0;
        *((volatile unsigned long *) (MCF_MBAR + MCFSIM_CSMR4)) = 0x000f0001;
        *((volatile unsigned short *) (MCF_MBAR + MCFSIM_CSCR4)) = 0x3d40;
#endif
#endif
}
 
/*****************************************************************************/

Line No.	Rev	Author	Line
1	1626	jcastillo	`/*****************************************************************************/`
2
3			`/*`
4			`* lcdtxt.c -- driver for a text based LCD display`
5			`*`
6			`* (C) Copyright 2000, greg Ungerer (gerg@moreton.com.au)`
7			`*/`
8
9			`/*****************************************************************************/`
10
11			`#include <linux/config.h>`
12			`#include <linux/types.h>`
13			`#include <linux/kernel.h>`
14			`#include <linux/fs.h>`
15			`#include <linux/mm.h>`
16			`#include <linux/delay.h>`
17			`#include <asm/param.h>`
18			`#include <asm/coldfire.h>`
19			`#include <asm/mcfsim.h>`
20
21			`/*****************************************************************************/`
22
23			`/*`
24			`* Define driver major number.`
25			`*/`
26			`#define LCDTXT_MAJOR 120`
27
28			`/*`
29			`* Define LCD hardware address.`
30			`*/`
31			`#define LCDTXT_ADDR 0x30800000`
32
33			`/*****************************************************************************/`
34
35			`int lcdtxt_open(struct inode inode, struct file filp)`
36			`{`
37			`#if 0`
38			`printk("lcdtxt_open()\n");`
39			`#endif`
40
41			`return(0);`
42			`}`
43
44			`/*****************************************************************************/`
45
46			`void lcdtxt_release(struct inode inode, struct file filp)`
47			`{`
48			`#if 0`
49			`printk("lcdtxt_close()\n");`
50			`#endif`
51			`}`
52
53			`/*****************************************************************************/`
54
55			`int lcdtxt_write(struct inode inode, struct file filp, const char *buf, int count)`
56			`{`
57			`volatile char *lcdp;`
58			`char *dp;`
59			`int num;`
60
61			`#if 0`
62			`printk("lcdtxt_write(buf=%x,count=%d)\n", (int) buf, count);`
63			`#endif`
64
65			`dp = (char *) buf;`
66			`lcdp = (volatile char *) LCDTXT_ADDR;`
67
68			`for (num = count; (num >= 0); num--) {`
69			`*lcdp = get_user(dp++);`
70			`udelay(1);`
71			`}`
72
73			`return(count);`
74			`}`
75
76			`/*****************************************************************************/`
77
78			`int lcdtxt_ioctl(struct inode inode, struct file filp, unsigned int cmd, unsigned long arg)`
79			`{`
80			`int rc = 0;`
81
82			`#if 0`
83			`switch (cmd) {`
84			`default:`
85			`rc = -EINVAL;`
86			`break;`
87			`}`
88			`#endif`
89
90			`return(rc);`
91			`}`
92
93			`/*****************************************************************************/`
94
95			`/*`
96			`* Exported file operations structure for driver...`
97			`*/`
98
99			`struct file_operations lcdtxt_fops = {`
100			`NULL, /* lseek */`
101			`NULL, /* read */`
102			`lcdtxt_write, /* write */`
103			`NULL, /* readdir */`
104			`NULL, /* poll */`
105			`lcdtxt_ioctl, /* ioctl */`
106			`NULL, /* mmap */`
107			`lcdtxt_open, /* open */`
108			`lcdtxt_release, /* release */`
109			`NULL, /* fsync */`
110			`NULL, /* fasync */`
111			`NULL, /* check_media_change */`
112			`NULL /* revalidate */`
113			`};`
114
115			`/*****************************************************************************/`
116
117			`void lcdtxt_init(void)`
118			`{`
119			`int rc;`
120
121			`/* Register lcdtxt as character device */`
122			`rc = register_chrdev(LCDTXT_MAJOR, "lcdtxt", &lcdtxt_fops);`
123			`if (rc < 0) {`
124			`printk(KERN_WARNING "LCDTXT: can't get major %d\n",`
125			`LCDTXT_MAJOR);`
126			`return;`
127			`}`
128
129			`printk("LCDTXT: Copyright (C) 2000, Greg Ungerer "`
130			`"(gerg@moreton.com.au)\n");`
131
132			`#if 0`
133			`/* Setup CS4 for our external hardware */`
134			`#ifdef CONFIG_OLDMASK`
135			`((volatile unsigned short ) (MCF_MBAR + MCFSIM_CSMR4)) = 0x0001;`
136			`((volatile unsigned short ) (MCF_MBAR + MCFSIM_CSCR4)) = 0x3d40;`
137			`#else`
138			`((volatile unsigned short ) (MCF_MBAR + MCFSIM_CSAR4)) = 0x30c0;`
139			`((volatile unsigned long ) (MCF_MBAR + MCFSIM_CSMR4)) = 0x000f0001;`
140			`((volatile unsigned short ) (MCF_MBAR + MCFSIM_CSCR4)) = 0x3d40;`
141			`#endif`
142			`#endif`
143			`}`
144
145			`/*****************************************************************************/`

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[/] [or1k_old/] [trunk/] [rc203soc/] [sw/] [uClinux/] [drivers/] [char/] [lcdtxt.c] - Blame information for rev 1765