1 // SPDX-License-Identifier: GPL-2.0-only
3  * Driver for AK8813 / AK8814 TV-ecoders from Asahi Kasei Microsystems Co., Ltd. (AKM)
16 #include <media/v4l2-common.h>
17 #include <media/v4l2-device.h>
31 	unsigned int lines;  member
61 static int ak881x_g_register(struct v4l2_subdev *sd,  in ak881x_g_register()  argument
64 	struct i2c_client *client = v4l2_get_subdevdata(sd);  in ak881x_g_register()
66 	if (reg->reg > 0x26)  in ak881x_g_register()
67 		return -EINVAL;  in ak881x_g_register()
69 	reg->size = 1;  in ak881x_g_register()
70 	reg->val = reg_read(client, reg->reg);  in ak881x_g_register()
72 	if (reg->val > 0xffff)  in ak881x_g_register()
73 		return -EIO;  in ak881x_g_register()
78 static int ak881x_s_register(struct v4l2_subdev *sd,  in ak881x_s_register()  argument
81 	struct i2c_client *client = v4l2_get_subdevdata(sd);  in ak881x_s_register()
83 	if (reg->reg > 0x26)  in ak881x_s_register()
84 		return -EINVAL;  in ak881x_s_register()
86 	if (reg_write(client, reg->reg, reg->val) < 0)  in ak881x_s_register()
87 		return -EIO;  in ak881x_s_register()
93 static int ak881x_fill_fmt(struct v4l2_subdev *sd,  in ak881x_fill_fmt()  argument
97 	struct v4l2_mbus_framefmt *mf = &format->format;  in ak881x_fill_fmt()
98 	struct i2c_client *client = v4l2_get_subdevdata(sd);  in ak881x_fill_fmt()
101 	if (format->pad)  in ak881x_fill_fmt()
102 		return -EINVAL;  in ak881x_fill_fmt()
104 	v4l_bound_align_image(&mf->width, 0, 720, 2,  in ak881x_fill_fmt()
105 			      &mf->height, 0, ak881x->lines, 1, 0);  in ak881x_fill_fmt()
106 	mf->field	= V4L2_FIELD_INTERLACED;  in ak881x_fill_fmt()
107 	mf->code	= MEDIA_BUS_FMT_YUYV8_2X8;  in ak881x_fill_fmt()
108 	mf->colorspace	= V4L2_COLORSPACE_SMPTE170M;  in ak881x_fill_fmt()
113 static int ak881x_enum_mbus_code(struct v4l2_subdev *sd,  in ak881x_enum_mbus_code()  argument
117 	if (code->pad || code->index)  in ak881x_enum_mbus_code()
118 		return -EINVAL;  in ak881x_enum_mbus_code()
120 	code->code = MEDIA_BUS_FMT_YUYV8_2X8;  in ak881x_enum_mbus_code()
124 static int ak881x_get_selection(struct v4l2_subdev *sd,  in ak881x_get_selection()  argument
128 	struct i2c_client *client = v4l2_get_subdevdata(sd);  in ak881x_get_selection()
131 	if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE)  in ak881x_get_selection()
132 		return -EINVAL;  in ak881x_get_selection()
134 	switch (sel->target) {  in ak881x_get_selection()
136 		sel->r.left = 0;  in ak881x_get_selection()
137 		sel->r.top = 0;  in ak881x_get_selection()
138 		sel->r.width = 720;  in ak881x_get_selection()
139 		sel->r.height = ak881x->lines;  in ak881x_get_selection()
142 		return -EINVAL;  in ak881x_get_selection()
146 static int ak881x_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)  in ak881x_s_std_output()  argument
148 	struct i2c_client *client = v4l2_get_subdevdata(sd);  in ak881x_s_std_output()
154 		ak881x->lines = 480;  in ak881x_s_std_output()
157 		ak881x->lines = 480;  in ak881x_s_std_output()
160 		ak881x->lines = 480;  in ak881x_s_std_output()
163 		ak881x->lines = 480;  in ak881x_s_std_output()
166 		ak881x->lines = 576;  in ak881x_s_std_output()
169 		return -EINVAL;  in ak881x_s_std_output()
177 static int ak881x_s_stream(struct v4l2_subdev *sd, int enable)  in ak881x_s_stream()  argument
179 	struct i2c_client *client = v4l2_get_subdevdata(sd);  in ak881x_s_stream()
184 		/* For colour-bar testing set bit 6 of AK881X_VIDEO_PROCESS1 */  in ak881x_s_stream()
186 		if (ak881x->pdata->flags & AK881X_COMPONENT)  in ak881x_s_stream()
192 		dev_dbg(&client->dev, "chip status 0x%x\n",  in ak881x_s_stream()
197 		dev_dbg(&client->dev, "chip status 0x%x\n",  in ak881x_s_stream()
231 	struct i2c_adapter *adapter = client->adapter;  in ak881x_probe()
236 		dev_warn(&adapter->dev,  in ak881x_probe()
237 			 "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");  in ak881x_probe()
238 		return -EIO;  in ak881x_probe()
241 	ak881x = devm_kzalloc(&client->dev, sizeof(*ak881x), GFP_KERNEL);  in ak881x_probe()
243 		return -ENOMEM;  in ak881x_probe()
245 	v4l2_i2c_subdev_init(&ak881x->subdev, client, &ak881x_subdev_ops);  in ak881x_probe()
254 		dev_err(&client->dev,  in ak881x_probe()
256 		return -ENODEV;  in ak881x_probe()
259 	ak881x->revision = reg_read(client, AK881X_DEVICE_REVISION);  in ak881x_probe()
260 	ak881x->pdata = client->dev.platform_data;  in ak881x_probe()
262 	if (ak881x->pdata) {  in ak881x_probe()
263 		if (ak881x->pdata->flags & AK881X_FIELD)  in ak881x_probe()
268 		switch (ak881x->pdata->flags & AK881X_IF_MODE_MASK) {  in ak881x_probe()
280 		dev_dbg(&client->dev, "IF mode %x\n", ifmode);  in ak881x_probe()
284 		 * "black" lines on, e.g., SuperH VOU, whose default value of 20  in ak881x_probe()
290 	/* Hardware default: NTSC-M */  in ak881x_probe()
291 	ak881x->lines = 480;  in ak881x_probe()
293 	dev_info(&client->dev, "Detected an ak881x chip ID %x, revision %x\n",  in ak881x_probe()
294 		 data, ak881x->revision);  in ak881x_probe()
303 	v4l2_device_unregister_subdev(&ak881x->subdev);  in ak881x_remove()
324 MODULE_DESCRIPTION("TV-output driver for ak8813/ak8814");