--- /dev/null
+/*
+ * 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.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#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/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 Vertial Scaling msb 0x00
+ chroma comb OFF, line drop scaling, interlace scaling
+ BUG? Why does turning the chroma comb on fuck up color?
+ Bug in the bt819 stepping on my board?
+ */
+ 0x14, 0x00, /* 0x14 Vertial 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_core_ops bt819_core_ops = {
+ .g_ext_ctrls = v4l2_subdev_g_ext_ctrls,
+ .try_ext_ctrls = v4l2_subdev_try_ext_ctrls,
+ .s_ext_ctrls = v4l2_subdev_s_ext_ctrls,
+ .g_ctrl = v4l2_subdev_g_ctrl,
+ .s_ctrl = v4l2_subdev_s_ctrl,
+ .queryctrl = v4l2_subdev_queryctrl,
+ .querymenu = v4l2_subdev_querymenu,
+};
+
+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 = {
+ .core = &bt819_core_ops,
+ .video = &bt819_video_ops,
+};
+
+/* ----------------------------------------------------------------------- */
+
+static int bt819_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ 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 int 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);
+ return 0;
+}
+
+/* ----------------------------------------------------------------------- */
+
+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 = {
+ .owner = THIS_MODULE,
+ .name = "bt819",
+ },
+ .probe = bt819_probe,
+ .remove = bt819_remove,
+ .id_table = bt819_id,
+};
+
+module_i2c_driver(bt819_driver);
Code Review / kvmfornfv.git / blobdiff