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support cat /dev/mga_vid.

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git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@4485 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
eyck 2002-02-02 21:39:25 +00:00
parent 22dfed32b5
commit 4fc4130bf7
1 changed files with 31 additions and 4 deletions
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35
drivers/mga_vid.c
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@ -92,6 +92,12 @@ MODULE_LICENSE("GPL");
#define PARAM_BRIGHTNESS "brightness="
#define PARAM_SATURATION "saturation="
#define PARAM_BLACKIE "blackie="
#define PARAM_BUFF_SIZE 4096
static uint8_t *mga_param_buff = NULL;
static uint32_t mga_param_buff_size=0;
static uint32_t mga_param_buff_len=0;
// end eyck
typedef struct bes_registers_s
@ -692,7 +698,7 @@ switch(config->format){
}
// setting black&white mode
regs.besctl|=(regs.blackie<<20); // TODO: check g200 & g400 (maybe tomorrow)
regs.besctl|=(regs.blackie<<20);
//Enable contrast and brightness control
regs.besglobctl |= (1<<5) + (1<<7);
@ -1312,15 +1318,35 @@ static int mga_vid_find_card(void)
return TRUE;
}
static void mga_param_buff_fill( void )
{
unsigned len;
len = 0;
len += sprintf(&mga_param_buff[len],"Interface version: %04X\n",MGA_VID_VERSION);
len += sprintf(&mga_param_buff[len],"Memory: %x:%xM\n",mga_mem_base,mga_ram_size);
len += sprintf(&mga_param_buff[len],"MMIO: %p\n",mga_mmio_base);
len += sprintf(&mga_param_buff[len],"Configurable stuff:\n");
len += sprintf(&mga_param_buff[len],"~~~~~~~~~~~~~~~~~~~\n");
len += sprintf(&mga_param_buff[len],PARAM_BRIGHTNESS"%X\n",regs.brightness);
len += sprintf(&mga_param_buff[len],PARAM_BLACKIE"%s\n",regs.blackie?"on":"off");
mga_param_buff_len = len;
}
static ssize_t mga_vid_read(struct file *file, char *buf, size_t count, loff_t *ppos)
{
return -EINVAL;
uint32_t size;
if(!mga_param_buff) return -ESPIPE;
if(!(*ppos)) mga_param_buff_fill();
if(*ppos >= mga_param_buff_len) return 0;
size = min(count,mga_param_buff_len-(uint32_t)(*ppos));
memcpy(buf,mga_param_buff,size);
*ppos += size;
return size;
}
static ssize_t mga_vid_write(struct file *file, const char *buf, size_t count, loff_t *ppos)
{
// WARNING: eyck changes
if(memcmp(buf,PARAM_BRIGHTNESS,min(count,strlen(PARAM_BRIGHTNESS))) == 0)
{
short brightness;
@ -1338,7 +1364,6 @@ static ssize_t mga_vid_write(struct file *file, const char *buf, size_t count, l
} else count = -EIO;
// TODO: reset settings
return count;
// return -EINVAL;
}
static int mga_vid_mmap(struct file *file, struct vm_area_struct *vma)
@ -1449,6 +1474,8 @@ static int mga_vid_initialize(void)
unregister_chrdev(MGA_VID_MAJOR, "mga_vid");
return -EINVAL;
}
mga_param_buff = kmalloc(PARAM_BUFF_SIZE,GFP_KERNEL);
if(mga_param_buff) mga_param_buff_size = PARAM_BUFF_SIZE;
return(0);
}