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V4L/DVB (5312): Saa713x: added a GPIO handler function 

This function allows to set, clear and tristate the GPIO ports.

Signed-off-by: Hartmut Hackmann <hartmut.hackmann@t-online.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Hartmut Hackmann 2007-04-27 12:31:11 -03:00 committed by Mauro Carvalho Chehab
parent 1bb0e8667f
commit b819594622
2 changed files with 42 additions and 0 deletions
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41
drivers/media/video/saa7134/saa7134-core.c
View File

@ -117,6 +117,47 @@ void saa7134_track_gpio(struct saa7134_dev *dev, char *msg)
dev->name, mode, (~mode) & status, mode & status, msg);
}
void saa7134_set_gpio(struct saa7134_dev *dev, int bit_no, int value)
{
u32 index, bitval;
u8 sync_control;
index = 1 << bit_no;
switch (value) {
case 0: /* static value */
case 1: dprintk("setting GPIO%d to static %d\n", bit_no, value);
/* turn sync mode off if necessary */
if (index & 0x00c00000)
saa_andorb(SAA7134_VIDEO_PORT_CTRL6, 0x0f, 0x00);
if (value)
bitval = index;
else
bitval = 0;
saa_andorl(SAA7134_GPIO_GPMODE0 >> 2, index, index);
saa_andorl(SAA7134_GPIO_GPSTATUS0 >> 2, index, bitval);
break;
case 3: /* tristate */
dprintk("setting GPIO%d to tristate\n", bit_no);
saa_andorl(SAA7134_GPIO_GPMODE0 >> 2, index, 0);
break;
case 4: /* sync output on GPIO 22 for tda8275a, 50Hz*/
case 5: /* sync output on GPIO 22 for tda8275a, 60Hz*/
if (bit_no == 22) {
dprintk("setting GPIO22 to vsync %d\n", value - 4);
saa_andorb(SAA7134_VIDEO_PORT_CTRL3, 0x80, 0x80);
saa_andorb(SAA7134_VIDEO_PORT_CTRL6, 0x0f, 0x03);
if (value == 5)
sync_control = 11;
else
sync_control = 17;
saa_writeb(SAA7134_VGATE_START, sync_control);
saa_writeb(SAA7134_VGATE_STOP, sync_control + 1);
saa_andorb(SAA7134_MISC_VGATE_MSB, 0x03, 0x00);
}
break;
}
}
/* ------------------------------------------------------------------ */

1
drivers/media/video/saa7134/saa7134.h
View File

@ -562,6 +562,7 @@ extern struct list_head saa7134_devlist;
extern int saa7134_no_overlay;
void saa7134_track_gpio(struct saa7134_dev *dev, char *msg);
void saa7134_set_gpio(struct saa7134_dev *dev, int bit_no, int value);
#define SAA7134_PGTABLE_SIZE 4096