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>
diff --git a/drivers/media/video/saa7134/saa7134-core.c b/drivers/media/video/saa7134/saa7134-core.c
index ed038ff..2e0518b 100644
--- a/drivers/media/video/saa7134/saa7134-core.c
+++ b/drivers/media/video/saa7134/saa7134-core.c
@@ -117,6 +117,47 @@
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;
+ }
+}
+
/* ------------------------------------------------------------------ */
diff --git a/drivers/media/video/saa7134/saa7134.h b/drivers/media/video/saa7134/saa7134.h
index b3e3957..7b5ae19 100644
--- a/drivers/media/video/saa7134/saa7134.h
+++ b/drivers/media/video/saa7134/saa7134.h
@@ -562,6 +562,7 @@
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