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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>
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2 changed files with 42 additions and 0 deletions
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@ -117,6 +117,47 @@ void saa7134_track_gpio(struct saa7134_dev *dev, char *msg)
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dev->name, mode, (~mode) & status, mode & status, msg);
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}
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void saa7134_set_gpio(struct saa7134_dev *dev, int bit_no, int value)
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{
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u32 index, bitval;
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u8 sync_control;
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index = 1 << bit_no;
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switch (value) {
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case 0: /* static value */
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case 1: dprintk("setting GPIO%d to static %d\n", bit_no, value);
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/* turn sync mode off if necessary */
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if (index & 0x00c00000)
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saa_andorb(SAA7134_VIDEO_PORT_CTRL6, 0x0f, 0x00);
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if (value)
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bitval = index;
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else
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bitval = 0;
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saa_andorl(SAA7134_GPIO_GPMODE0 >> 2, index, index);
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saa_andorl(SAA7134_GPIO_GPSTATUS0 >> 2, index, bitval);
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break;
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case 3: /* tristate */
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dprintk("setting GPIO%d to tristate\n", bit_no);
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saa_andorl(SAA7134_GPIO_GPMODE0 >> 2, index, 0);
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break;
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case 4: /* sync output on GPIO 22 for tda8275a, 50Hz*/
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case 5: /* sync output on GPIO 22 for tda8275a, 60Hz*/
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if (bit_no == 22) {
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dprintk("setting GPIO22 to vsync %d\n", value - 4);
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saa_andorb(SAA7134_VIDEO_PORT_CTRL3, 0x80, 0x80);
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saa_andorb(SAA7134_VIDEO_PORT_CTRL6, 0x0f, 0x03);
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if (value == 5)
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sync_control = 11;
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else
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sync_control = 17;
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saa_writeb(SAA7134_VGATE_START, sync_control);
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saa_writeb(SAA7134_VGATE_STOP, sync_control + 1);
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saa_andorb(SAA7134_MISC_VGATE_MSB, 0x03, 0x00);
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}
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break;
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}
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}
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/* ------------------------------------------------------------------ */
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@ -562,6 +562,7 @@ extern struct list_head saa7134_devlist;
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extern int saa7134_no_overlay;
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void saa7134_track_gpio(struct saa7134_dev *dev, char *msg);
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void saa7134_set_gpio(struct saa7134_dev *dev, int bit_no, int value);
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#define SAA7134_PGTABLE_SIZE 4096
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