V4L/DVB (11282): saa7134: add RDS support.

The Terratec Cinergy 600 TV MK3 supports the RDS decoder saa6588.
Add support to saa7134 for such devices.
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/saa7134/Kconfig

@@ -6,6 +6,7 @@ config VIDEO_SAA7134
 	select VIDEO_TUNER
 	select VIDEO_TVEEPROM
 	select CRC32
+	select VIDEO_SAA6588 if VIDEO_HELPER_CHIPS_AUTO
 	---help---
 	  This is a video4linux driver for Philips SAA713x based
 	  TV cards.

drivers/media/video/saa7134/saa7134-cards.c

@@ -1704,6 +1704,7 @@ struct saa7134_board saa7134_boards[] = {
 		.radio_type     = UNSET,
 		.tuner_addr	= ADDR_UNSET,
 		.radio_addr	= ADDR_UNSET,
+		.rds_addr 	= 0x10,
 		.tda9887_conf   = TDA9887_PRESENT,
 		.inputs         = {{
 			.name = name_tv,

drivers/media/video/saa7134/saa7134-core.c

@@ -990,6 +990,17 @@ static int __devinit saa7134_initdev(struct pci_dev *pci_dev,
 			sd->grp_id = GRP_EMPRESS;
 	}
 
+	if (saa7134_boards[dev->board].rds_addr) {
+		unsigned short addrs[2] = { 0, I2C_CLIENT_END };
+		struct v4l2_subdev *sd;
+
+		addrs[0] = saa7134_boards[dev->board].rds_addr;
+		sd = v4l2_i2c_new_probed_subdev(&dev->i2c_adap, "saa6588",
+			    "saa6588", addrs);
+		if (sd)
+			printk(KERN_INFO "%s: found RDS decoder\n", dev->name);
+	}
+
 	request_submodules(dev);
 
 	v4l2_prio_init(&dev->prio);

drivers/media/video/saa7134/saa7134-video.c

@@ -30,6 +30,7 @@
 #include "saa7134-reg.h"
 #include "saa7134.h"
 #include <media/v4l2-common.h>
+#include <media/rds.h>
 
 /* ------------------------------------------------------------------ */
 
@@ -1462,6 +1463,7 @@ static int video_release(struct file *file)
 {
 	struct saa7134_fh  *fh  = file->private_data;
 	struct saa7134_dev *dev = fh->dev;
+	struct rds_command cmd;
 	unsigned long flags;
 
 	/* turn off overlay */
@@ -1495,6 +1497,8 @@ static int video_release(struct file *file)
 	saa_andorb(SAA7134_OFMT_DATA_B, 0x1f, 0);
 
 	saa_call_all(dev, core, s_standby, 0);
+	if (fh->radio)
+		saa_call_all(dev, core, ioctl, RDS_CMD_CLOSE, &cmd);
 
 	/* free stuff */
 	videobuf_mmap_free(&fh->cap);
@@ -1515,6 +1519,37 @@ static int video_mmap(struct file *file, struct vm_area_struct * vma)
 	return videobuf_mmap_mapper(saa7134_queue(fh), vma);
 }
 
+static ssize_t radio_read(struct file *file, char __user *data,
+			 size_t count, loff_t *ppos)
+{
+	struct saa7134_fh *fh = file->private_data;
+	struct saa7134_dev *dev = fh->dev;
+	struct rds_command cmd;
+
+	cmd.block_count = count/3;
+	cmd.buffer = data;
+	cmd.instance = file;
+	cmd.result = -ENODEV;
+
+	saa_call_all(dev, core, ioctl, RDS_CMD_READ, &cmd);
+
+	return cmd.result;
+}
+
+static unsigned int radio_poll(struct file *file, poll_table *wait)
+{
+	struct saa7134_fh *fh = file->private_data;
+	struct saa7134_dev *dev = fh->dev;
+	struct rds_command cmd;
+
+	cmd.instance = file;
+	cmd.event_list = wait;
+	cmd.result = -ENODEV;
+	saa_call_all(dev, core, ioctl, RDS_CMD_POLL, &cmd);
+
+	return cmd.result;
+}
+
 /* ------------------------------------------------------------------ */
 
 static int saa7134_try_get_set_fmt_vbi_cap(struct file *file, void *priv,
@@ -2439,8 +2474,10 @@ static const struct v4l2_ioctl_ops video_ioctl_ops = {
 static const struct v4l2_file_operations radio_fops = {
 	.owner	  = THIS_MODULE,
 	.open	  = video_open,
+	.read     = radio_read,
 	.release  = video_release,
 	.ioctl	  = video_ioctl2,
+	.poll     = radio_poll,
 };
 
 static const struct v4l2_ioctl_ops radio_ioctl_ops = {

drivers/media/video/saa7134/saa7134.h

@@ -333,6 +333,7 @@ struct saa7134_board {
 	unsigned char		tuner_addr;
 	unsigned char		radio_addr;
 	unsigned char		empress_addr;
+	unsigned char		rds_addr;
 
 	unsigned int            tda9887_conf;
 	unsigned int            tuner_config;