[media] saa7134-go7007: convert to a subdev and the control framework

The only thing missing after this to make the Sensoray model 614 board work is
to hook it up to the saa7134 driver, but that will have to wait until this
driver goes out of staging.
Signed-off-by: Pete Eberlein <pete@sensoray.com>
[hans.verkuil@cisco.com: updated to make it merge correctly]
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/staging/media/go7007/Makefile

@@ -10,7 +10,7 @@ s2250-y := s2250-board.o
 
 # Uncomment when the saa7134 patches get into upstream
 #obj-$(CONFIG_VIDEO_SAA7134) += saa7134-go7007.o
-#ccflags-$(CONFIG_VIDEO_SAA7134:m=y) += -Idrivers/media/video/saa7134 -DSAA7134_MPEG_GO7007=3
+#ccflags-$(CONFIG_VIDEO_SAA7134:m=y) += -Idrivers/media/pci/saa7134
 
 # go7007-loader needs cypress ezusb loader from dvb-usb-v2
 ccflags-$(CONFIG_VIDEO_GO7007_LOADER:m=y) += -Idrivers/media/usb/dvb-usb-v2

drivers/staging/media/go7007/saa7134-go7007.c

@@ -28,12 +28,15 @@
 #include <linux/i2c.h>
 #include <asm/byteorder.h>
 #include <media/v4l2-common.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-subdev.h>
 
-#include "saa7134-reg.h"
 #include "saa7134.h"
+#include "saa7134-reg.h"
+#include "go7007.h"
 #include "go7007-priv.h"
 
-#define GO7007_HPI_DEBUG
+/*#define GO7007_HPI_DEBUG*/
 
 enum hpi_address {
 	HPI_ADDR_VIDEO_BUFFER = 0xe4,
@@ -57,6 +60,7 @@ enum gpio_command {
 };
 
 struct saa7134_go7007 {
+	struct v4l2_subdev sd;
 	struct saa7134_dev *dev;
 	u8 *top;
 	u8 *bottom;
@@ -64,6 +68,11 @@ struct saa7134_go7007 {
 	dma_addr_t bottom_dma;
 };
 
+static inline struct saa7134_go7007 *to_state(struct v4l2_subdev *sd)
+{
+	return container_of(sd, struct saa7134_go7007, sd);
+}
+
 static const struct go7007_board_info board_voyager = {
 	.flags		 = 0,
 	.sensor_flags	 = GO7007_SENSOR_656 |
@@ -83,7 +92,6 @@ static const struct go7007_board_info board_voyager = {
 		},
 	},
 };
-MODULE_FIRMWARE("go7007tv.bin");
 
 /********************* Driver for GPIO HPI interface *********************/
 
@@ -379,47 +387,6 @@ static int saa7134_go7007_send_firmware(struct go7007 *go, u8 *data, int len)
 	return 0;
 }
 
-static int saa7134_go7007_send_command(struct go7007 *go, unsigned int cmd,
-					void *arg)
-{
-	struct saa7134_go7007 *saa = go->hpi_context;
-	struct saa7134_dev *dev = saa->dev;
-
-	switch (cmd) {
-	case VIDIOC_S_STD:
-	{
-		v4l2_std_id *std = arg;
-		return saa7134_s_std_internal(dev, NULL, std);
-	}
-	case VIDIOC_G_STD:
-	{
-		v4l2_std_id *std = arg;
-		*std = dev->tvnorm->id;
-		return 0;
-	}
-	case VIDIOC_QUERYCTRL:
-	{
-		struct v4l2_queryctrl *ctrl = arg;
-		if (V4L2_CTRL_ID2CLASS(ctrl->id) == V4L2_CTRL_CLASS_USER)
-			return saa7134_queryctrl(NULL, NULL, ctrl);
-	}
-	case VIDIOC_G_CTRL:
-	{
-		struct v4l2_control *ctrl = arg;
-		if (V4L2_CTRL_ID2CLASS(ctrl->id) == V4L2_CTRL_CLASS_USER)
-			return saa7134_g_ctrl_internal(dev, NULL, ctrl);
-	}
-	case VIDIOC_S_CTRL:
-	{
-		struct v4l2_control *ctrl = arg;
-		if (V4L2_CTRL_ID2CLASS(ctrl->id) == V4L2_CTRL_CLASS_USER)
-			return saa7134_s_ctrl_internal(dev, NULL, ctrl);
-	}
-	}
-	return -EINVAL;
-
-}
-
 static struct go7007_hpi_ops saa7134_go7007_hpi_ops = {
 	.interface_reset	= saa7134_go7007_interface_reset,
 	.write_interrupt	= saa7134_go7007_write_interrupt,
@@ -427,16 +394,63 @@ static struct go7007_hpi_ops saa7134_go7007_hpi_ops = {
 	.stream_start		= saa7134_go7007_stream_start,
 	.stream_stop		= saa7134_go7007_stream_stop,
 	.send_firmware		= saa7134_go7007_send_firmware,
-	.send_command		= saa7134_go7007_send_command,
 };
 MODULE_FIRMWARE("go7007/go7007tv.bin");
 
+/* --------------------------------------------------------------------------*/
+
+static int saa7134_go7007_s_std(struct v4l2_subdev *sd, v4l2_std_id norm)
+{
+	struct saa7134_go7007 *saa = to_state(sd);
+	struct saa7134_dev *dev = saa->dev;
+
+	return saa7134_s_std_internal(dev, NULL, norm);
+}
+
+static int saa7134_go7007_queryctrl(struct v4l2_subdev *sd,
+				    struct v4l2_queryctrl *query)
+{
+	return saa7134_queryctrl(NULL, NULL, query);
+}
+static int saa7134_go7007_s_ctrl(struct v4l2_subdev *sd,
+				 struct v4l2_control *ctrl)
+{
+	struct saa7134_go7007 *saa = to_state(sd);
+	struct saa7134_dev *dev = saa->dev;
+	return saa7134_s_ctrl_internal(dev, NULL, ctrl);
+}
+
+static int saa7134_go7007_g_ctrl(struct v4l2_subdev *sd,
+				 struct v4l2_control *ctrl)
+{
+	struct saa7134_go7007 *saa = to_state(sd);
+	struct saa7134_dev *dev = saa->dev;
+	return saa7134_g_ctrl_internal(dev, NULL, ctrl);
+}
+
+/* --------------------------------------------------------------------------*/
+
+static const struct v4l2_subdev_core_ops saa7134_go7007_core_ops = {
+	.g_ctrl = saa7134_go7007_g_ctrl,
+	.s_ctrl = saa7134_go7007_s_ctrl,
+	.queryctrl = saa7134_go7007_queryctrl,
+	.s_std = saa7134_go7007_s_std,
+};
+
+static const struct v4l2_subdev_ops saa7134_go7007_sd_ops = {
+	.core = &saa7134_go7007_core_ops,
+};
+
+/* --------------------------------------------------------------------------*/
+
+
 /********************* Add/remove functions *********************/
 
 static int saa7134_go7007_init(struct saa7134_dev *dev)
 {
 	struct go7007 *go;
 	struct saa7134_go7007 *saa;
+	struct v4l2_subdev *sd;
 
 	printk(KERN_DEBUG "saa7134-go7007: probing new SAA713X board\n");
 
@@ -444,6 +458,12 @@ static int saa7134_go7007_init(struct saa7134_dev *dev)
 	if (saa == NULL)
 		return -ENOMEM;
 
+	/* Init the subdevice interface */
+	sd = &saa->sd;
+	v4l2_subdev_init(sd, &saa7134_go7007_sd_ops);
+	v4l2_set_subdevdata(sd, saa);
+	strncpy(sd->name, "saa7134-go7007", sizeof(sd->name));
+
 	/* Allocate a couple pages for receiving the compressed stream */
 	saa->top = (u8 *)get_zeroed_page(GFP_KERNEL);
 	if (!saa->top)
@@ -471,8 +491,12 @@ static int saa7134_go7007_init(struct saa7134_dev *dev)
 	 * V4L2 and ALSA interfaces */
 	if (go7007_register_encoder(go, go->board_info->num_i2c_devs) < 0)
 		goto initfail;
+
+	/* Register the subdevice interface with the go7007 device */
+	if (v4l2_device_register_subdev(&go->v4l2_dev, sd) < 0)
+		printk(KERN_INFO "saa7134-go7007: register subdev failed\n");
+
 	dev->empress_dev = &go->vdev;
-	video_set_drvdata(dev->empress_dev, go);
 
 	go->status = STATUS_ONLINE;
 	return 0;
@@ -506,6 +530,7 @@ static int saa7134_go7007_fini(struct saa7134_dev *dev)
 	go->status = STATUS_SHUTDOWN;
 	free_page((unsigned long)saa->top);
 	free_page((unsigned long)saa->bottom);
+	v4l2_device_unregister_subdev(&saa->sd);
 	kfree(saa);
 	video_unregister_device(&go->vdev);