1 files changed, 476 insertions, 0 deletions

diff --git a/drivers/media/i2c/bt819.c b/drivers/media/i2c/bt819.c
new file mode 100644
index 0000000000..b4a25cc996
--- /dev/null
+++ b/drivers/media/i2c/bt819.c
@@ -0,0 +1,476 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *  bt819 - BT819A VideoStream Decoder (Rockwell Part)
+ *
+ * Copyright (C) 1999 Mike Bernson <mike@mlb.org>
+ * Copyright (C) 1998 Dave Perks <dperks@ibm.net>
+ *
+ * Modifications for LML33/DC10plus unified driver
+ * Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
+ *
+ * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>
+ *    - moved over to linux>=2.4.x i2c protocol (9/9/2002)
+ *
+ * This code was modify/ported from the saa7111 driver written
+ * by Dave Perks.
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/ioctl.h>
+#include <linux/delay.h>
+#include <linux/i2c.h>
+#include <linux/videodev2.h>
+#include <linux/slab.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-ctrls.h>
+#include <media/i2c/bt819.h>
+
+MODULE_DESCRIPTION("Brooktree-819 video decoder driver");
+MODULE_AUTHOR("Mike Bernson & Dave Perks");
+MODULE_LICENSE("GPL");
+
+static int debug;
+module_param(debug, int, 0);
+MODULE_PARM_DESC(debug, "Debug level (0-1)");
+
+
+/* ----------------------------------------------------------------------- */
+
+struct bt819 {
+	struct v4l2_subdev sd;
+	struct v4l2_ctrl_handler hdl;
+	unsigned char reg[32];
+
+	v4l2_std_id norm;
+	int input;
+	int enable;
+};
+
+static inline struct bt819 *to_bt819(struct v4l2_subdev *sd)
+{
+	return container_of(sd, struct bt819, sd);
+}
+
+static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
+{
+	return &container_of(ctrl->handler, struct bt819, hdl)->sd;
+}
+
+struct timing {
+	int hactive;
+	int hdelay;
+	int vactive;
+	int vdelay;
+	int hscale;
+	int vscale;
+};
+
+/* for values, see the bt819 datasheet */
+static struct timing timing_data[] = {
+	{864 - 24, 20, 625 - 2, 1, 0x0504, 0x0000},
+	{858 - 24, 20, 525 - 2, 1, 0x00f8, 0x0000},
+};
+
+/* ----------------------------------------------------------------------- */
+
+static inline int bt819_write(struct bt819 *decoder, u8 reg, u8 value)
+{
+	struct i2c_client *client = v4l2_get_subdevdata(&decoder->sd);
+
+	decoder->reg[reg] = value;
+	return i2c_smbus_write_byte_data(client, reg, value);
+}
+
+static inline int bt819_setbit(struct bt819 *decoder, u8 reg, u8 bit, u8 value)
+{
+	return bt819_write(decoder, reg,
+		(decoder->reg[reg] & ~(1 << bit)) | (value ? (1 << bit) : 0));
+}
+
+static int bt819_write_block(struct bt819 *decoder, const u8 *data, unsigned int len)
+{
+	struct i2c_client *client = v4l2_get_subdevdata(&decoder->sd);
+	int ret = -1;
+	u8 reg;
+
+	/* the bt819 has an autoincrement function, use it if
+	 * the adapter understands raw I2C */
+	if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
+		/* do raw I2C, not smbus compatible */
+		u8 block_data[32];
+		int block_len;
+
+		while (len >= 2) {
+			block_len = 0;
+			block_data[block_len++] = reg = data[0];
+			do {
+				block_data[block_len++] =
+				    decoder->reg[reg++] = data[1];
+				len -= 2;
+				data += 2;
+			} while (len >= 2 && data[0] == reg && block_len < 32);
+			ret = i2c_master_send(client, block_data, block_len);
+			if (ret < 0)
+				break;
+		}
+	} else {
+		/* do some slow I2C emulation kind of thing */
+		while (len >= 2) {
+			reg = *data++;
+			ret = bt819_write(decoder, reg, *data++);
+			if (ret < 0)
+				break;
+			len -= 2;
+		}
+	}
+
+	return ret;
+}
+
+static inline int bt819_read(struct bt819 *decoder, u8 reg)
+{
+	struct i2c_client *client = v4l2_get_subdevdata(&decoder->sd);
+
+	return i2c_smbus_read_byte_data(client, reg);
+}
+
+static int bt819_init(struct v4l2_subdev *sd)
+{
+	static unsigned char init[] = {
+		/*0x1f, 0x00,*/     /* Reset */
+		0x01, 0x59,	/* 0x01 input format */
+		0x02, 0x00,	/* 0x02 temporal decimation */
+		0x03, 0x12,	/* 0x03 Cropping msb */
+		0x04, 0x16,	/* 0x04 Vertical Delay, lsb */
+		0x05, 0xe0,	/* 0x05 Vertical Active lsb */
+		0x06, 0x80,	/* 0x06 Horizontal Delay lsb */
+		0x07, 0xd0,	/* 0x07 Horizontal Active lsb */
+		0x08, 0x00,	/* 0x08 Horizontal Scaling msb */
+		0x09, 0xf8,	/* 0x09 Horizontal Scaling lsb */
+		0x0a, 0x00,	/* 0x0a Brightness control */
+		0x0b, 0x30,	/* 0x0b Miscellaneous control */
+		0x0c, 0xd8,	/* 0x0c Luma Gain lsb */
+		0x0d, 0xfe,	/* 0x0d Chroma Gain (U) lsb */
+		0x0e, 0xb4,	/* 0x0e Chroma Gain (V) msb */
+		0x0f, 0x00,	/* 0x0f Hue control */
+		0x12, 0x04,	/* 0x12 Output Format */
+		0x13, 0x20,	/* 0x13 Vertical Scaling msb 0x00
+					   chroma comb OFF, line drop scaling, interlace scaling
+					   BUG? Why does turning the chroma comb on screw up color?
+					   Bug in the bt819 stepping on my board?
+					*/
+		0x14, 0x00,	/* 0x14 Vertical Scaling lsb */
+		0x16, 0x07,	/* 0x16 Video Timing Polarity
+					   ACTIVE=active low
+					   FIELD: high=odd,
+					   vreset=active high,
+					   hreset=active high */
+		0x18, 0x68,	/* 0x18 AGC Delay */
+		0x19, 0x5d,	/* 0x19 Burst Gate Delay */
+		0x1a, 0x80,	/* 0x1a ADC Interface */
+	};
+
+	struct bt819 *decoder = to_bt819(sd);
+	struct timing *timing = &timing_data[(decoder->norm & V4L2_STD_525_60) ? 1 : 0];
+
+	init[0x03 * 2 - 1] =
+	    (((timing->vdelay >> 8) & 0x03) << 6) |
+	    (((timing->vactive >> 8) & 0x03) << 4) |
+	    (((timing->hdelay >> 8) & 0x03) << 2) |
+	    ((timing->hactive >> 8) & 0x03);
+	init[0x04 * 2 - 1] = timing->vdelay & 0xff;
+	init[0x05 * 2 - 1] = timing->vactive & 0xff;
+	init[0x06 * 2 - 1] = timing->hdelay & 0xff;
+	init[0x07 * 2 - 1] = timing->hactive & 0xff;
+	init[0x08 * 2 - 1] = timing->hscale >> 8;
+	init[0x09 * 2 - 1] = timing->hscale & 0xff;
+	/* 0x15 in array is address 0x19 */
+	init[0x15 * 2 - 1] = (decoder->norm & V4L2_STD_625_50) ? 115 : 93;	/* Chroma burst delay */
+	/* reset */
+	bt819_write(decoder, 0x1f, 0x00);
+	mdelay(1);
+
+	/* init */
+	return bt819_write_block(decoder, init, sizeof(init));
+}
+
+/* ----------------------------------------------------------------------- */
+
+static int bt819_status(struct v4l2_subdev *sd, u32 *pstatus, v4l2_std_id *pstd)
+{
+	struct bt819 *decoder = to_bt819(sd);
+	int status = bt819_read(decoder, 0x00);
+	int res = V4L2_IN_ST_NO_SIGNAL;
+	v4l2_std_id std = pstd ? *pstd : V4L2_STD_ALL;
+
+	if ((status & 0x80))
+		res = 0;
+	else
+		std = V4L2_STD_UNKNOWN;
+
+	if ((status & 0x10))
+		std &= V4L2_STD_PAL;
+	else
+		std &= V4L2_STD_NTSC;
+	if (pstd)
+		*pstd = std;
+	if (pstatus)
+		*pstatus = res;
+
+	v4l2_dbg(1, debug, sd, "get status %x\n", status);
+	return 0;
+}
+
+static int bt819_querystd(struct v4l2_subdev *sd, v4l2_std_id *std)
+{
+	return bt819_status(sd, NULL, std);
+}
+
+static int bt819_g_input_status(struct v4l2_subdev *sd, u32 *status)
+{
+	return bt819_status(sd, status, NULL);
+}
+
+static int bt819_s_std(struct v4l2_subdev *sd, v4l2_std_id std)
+{
+	struct bt819 *decoder = to_bt819(sd);
+	struct timing *timing = NULL;
+
+	v4l2_dbg(1, debug, sd, "set norm %llx\n", (unsigned long long)std);
+
+	if (sd->v4l2_dev == NULL || sd->v4l2_dev->notify == NULL)
+		v4l2_err(sd, "no notify found!\n");
+
+	if (std & V4L2_STD_NTSC) {
+		v4l2_subdev_notify(sd, BT819_FIFO_RESET_LOW, NULL);
+		bt819_setbit(decoder, 0x01, 0, 1);
+		bt819_setbit(decoder, 0x01, 1, 0);
+		bt819_setbit(decoder, 0x01, 5, 0);
+		bt819_write(decoder, 0x18, 0x68);
+		bt819_write(decoder, 0x19, 0x5d);
+		/* bt819_setbit(decoder, 0x1a,  5, 1); */
+		timing = &timing_data[1];
+	} else if (std & V4L2_STD_PAL) {
+		v4l2_subdev_notify(sd, BT819_FIFO_RESET_LOW, NULL);
+		bt819_setbit(decoder, 0x01, 0, 1);
+		bt819_setbit(decoder, 0x01, 1, 1);
+		bt819_setbit(decoder, 0x01, 5, 1);
+		bt819_write(decoder, 0x18, 0x7f);
+		bt819_write(decoder, 0x19, 0x72);
+		/* bt819_setbit(decoder, 0x1a,  5, 0); */
+		timing = &timing_data[0];
+	} else {
+		v4l2_dbg(1, debug, sd, "unsupported norm %llx\n",
+				(unsigned long long)std);
+		return -EINVAL;
+	}
+	bt819_write(decoder, 0x03,
+			(((timing->vdelay >> 8) & 0x03) << 6) |
+			(((timing->vactive >> 8) & 0x03) << 4) |
+			(((timing->hdelay >> 8) & 0x03) << 2) |
+			((timing->hactive >> 8) & 0x03));
+	bt819_write(decoder, 0x04, timing->vdelay & 0xff);
+	bt819_write(decoder, 0x05, timing->vactive & 0xff);
+	bt819_write(decoder, 0x06, timing->hdelay & 0xff);
+	bt819_write(decoder, 0x07, timing->hactive & 0xff);
+	bt819_write(decoder, 0x08, (timing->hscale >> 8) & 0xff);
+	bt819_write(decoder, 0x09, timing->hscale & 0xff);
+	decoder->norm = std;
+	v4l2_subdev_notify(sd, BT819_FIFO_RESET_HIGH, NULL);
+	return 0;
+}
+
+static int bt819_s_routing(struct v4l2_subdev *sd,
+			   u32 input, u32 output, u32 config)
+{
+	struct bt819 *decoder = to_bt819(sd);
+
+	v4l2_dbg(1, debug, sd, "set input %x\n", input);
+
+	if (input > 7)
+		return -EINVAL;
+
+	if (sd->v4l2_dev == NULL || sd->v4l2_dev->notify == NULL)
+		v4l2_err(sd, "no notify found!\n");
+
+	if (decoder->input != input) {
+		v4l2_subdev_notify(sd, BT819_FIFO_RESET_LOW, NULL);
+		decoder->input = input;
+		/* select mode */
+		if (decoder->input == 0) {
+			bt819_setbit(decoder, 0x0b, 6, 0);
+			bt819_setbit(decoder, 0x1a, 1, 1);
+		} else {
+			bt819_setbit(decoder, 0x0b, 6, 1);
+			bt819_setbit(decoder, 0x1a, 1, 0);
+		}
+		v4l2_subdev_notify(sd, BT819_FIFO_RESET_HIGH, NULL);
+	}
+	return 0;
+}
+
+static int bt819_s_stream(struct v4l2_subdev *sd, int enable)
+{
+	struct bt819 *decoder = to_bt819(sd);
+
+	v4l2_dbg(1, debug, sd, "enable output %x\n", enable);
+
+	if (decoder->enable != enable) {
+		decoder->enable = enable;
+		bt819_setbit(decoder, 0x16, 7, !enable);
+	}
+	return 0;
+}
+
+static int bt819_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+	struct v4l2_subdev *sd = to_sd(ctrl);
+	struct bt819 *decoder = to_bt819(sd);
+	int temp;
+
+	switch (ctrl->id) {
+	case V4L2_CID_BRIGHTNESS:
+		bt819_write(decoder, 0x0a, ctrl->val);
+		break;
+
+	case V4L2_CID_CONTRAST:
+		bt819_write(decoder, 0x0c, ctrl->val & 0xff);
+		bt819_setbit(decoder, 0x0b, 2, ((ctrl->val >> 8) & 0x01));
+		break;
+
+	case V4L2_CID_SATURATION:
+		bt819_write(decoder, 0x0d, (ctrl->val >> 7) & 0xff);
+		bt819_setbit(decoder, 0x0b, 1, ((ctrl->val >> 15) & 0x01));
+
+		/* Ratio between U gain and V gain must stay the same as
+		   the ratio between the default U and V gain values. */
+		temp = (ctrl->val * 180) / 254;
+		bt819_write(decoder, 0x0e, (temp >> 7) & 0xff);
+		bt819_setbit(decoder, 0x0b, 0, (temp >> 15) & 0x01);
+		break;
+
+	case V4L2_CID_HUE:
+		bt819_write(decoder, 0x0f, ctrl->val);
+		break;
+
+	default:
+		return -EINVAL;
+	}
+	return 0;
+}
+
+/* ----------------------------------------------------------------------- */
+
+static const struct v4l2_ctrl_ops bt819_ctrl_ops = {
+	.s_ctrl = bt819_s_ctrl,
+};
+
+static const struct v4l2_subdev_video_ops bt819_video_ops = {
+	.s_std = bt819_s_std,
+	.s_routing = bt819_s_routing,
+	.s_stream = bt819_s_stream,
+	.querystd = bt819_querystd,
+	.g_input_status = bt819_g_input_status,
+};
+
+static const struct v4l2_subdev_ops bt819_ops = {
+	.video = &bt819_video_ops,
+};
+
+/* ----------------------------------------------------------------------- */
+
+static int bt819_probe(struct i2c_client *client)
+{
+	int i, ver;
+	struct bt819 *decoder;
+	struct v4l2_subdev *sd;
+	const char *name;
+
+	/* Check if the adapter supports the needed features */
+	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
+		return -ENODEV;
+
+	decoder = devm_kzalloc(&client->dev, sizeof(*decoder), GFP_KERNEL);
+	if (decoder == NULL)
+		return -ENOMEM;
+	sd = &decoder->sd;
+	v4l2_i2c_subdev_init(sd, client, &bt819_ops);
+
+	ver = bt819_read(decoder, 0x17);
+	switch (ver & 0xf0) {
+	case 0x70:
+		name = "bt819a";
+		break;
+	case 0x60:
+		name = "bt817a";
+		break;
+	case 0x20:
+		name = "bt815a";
+		break;
+	default:
+		v4l2_dbg(1, debug, sd,
+			"unknown chip version 0x%02x\n", ver);
+		return -ENODEV;
+	}
+
+	v4l_info(client, "%s found @ 0x%x (%s)\n", name,
+			client->addr << 1, client->adapter->name);
+
+	decoder->norm = V4L2_STD_NTSC;
+	decoder->input = 0;
+	decoder->enable = 1;
+
+	i = bt819_init(sd);
+	if (i < 0)
+		v4l2_dbg(1, debug, sd, "init status %d\n", i);
+
+	v4l2_ctrl_handler_init(&decoder->hdl, 4);
+	v4l2_ctrl_new_std(&decoder->hdl, &bt819_ctrl_ops,
+			V4L2_CID_BRIGHTNESS, -128, 127, 1, 0);
+	v4l2_ctrl_new_std(&decoder->hdl, &bt819_ctrl_ops,
+			V4L2_CID_CONTRAST, 0, 511, 1, 0xd8);
+	v4l2_ctrl_new_std(&decoder->hdl, &bt819_ctrl_ops,
+			V4L2_CID_SATURATION, 0, 511, 1, 0xfe);
+	v4l2_ctrl_new_std(&decoder->hdl, &bt819_ctrl_ops,
+			V4L2_CID_HUE, -128, 127, 1, 0);
+	sd->ctrl_handler = &decoder->hdl;
+	if (decoder->hdl.error) {
+		int err = decoder->hdl.error;
+
+		v4l2_ctrl_handler_free(&decoder->hdl);
+		return err;
+	}
+	v4l2_ctrl_handler_setup(&decoder->hdl);
+	return 0;
+}
+
+static void bt819_remove(struct i2c_client *client)
+{
+	struct v4l2_subdev *sd = i2c_get_clientdata(client);
+	struct bt819 *decoder = to_bt819(sd);
+
+	v4l2_device_unregister_subdev(sd);
+	v4l2_ctrl_handler_free(&decoder->hdl);
+}
+
+/* ----------------------------------------------------------------------- */
+
+static const struct i2c_device_id bt819_id[] = {
+	{ "bt819a", 0 },
+	{ "bt817a", 0 },
+	{ "bt815a", 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, bt819_id);
+
+static struct i2c_driver bt819_driver = {
+	.driver = {
+		.name	= "bt819",
+	},
+	.probe		= bt819_probe,
+	.remove		= bt819_remove,
+	.id_table	= bt819_id,
+};
+
+module_i2c_driver(bt819_driver);