1 files changed, 517 insertions, 0 deletions

diff --git a/drivers/media/i2c/bt819.c b/drivers/media/i2c/bt819.c
new file mode 100644
index 000000000000..377bf05b1efd
--- /dev/null
+++ b/drivers/media/i2c/bt819.c
@@ -0,0 +1,517 @@
+/*
+ *  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-chip-ident.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 ident;
+        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;
+
+        if ((status & 0x80))
+                res = 0;
+
+        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 int bt819_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
+{
+        struct bt819 *decoder = to_bt819(sd);
+        struct i2c_client *client = v4l2_get_subdevdata(sd);
+
+        return v4l2_chip_ident_i2c_client(client, chip, decoder->ident, 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_chip_ident = bt819_g_chip_ident,
+        .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,
+        .s_std = bt819_s_std,
+};
+
+static const struct v4l2_subdev_video_ops bt819_video_ops = {
+        .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 = kzalloc(sizeof(struct bt819), 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";
+                decoder->ident = V4L2_IDENT_BT819A;
+                break;
+        case 0x60:
+                name = "bt817a";
+                decoder->ident = V4L2_IDENT_BT817A;
+                break;
+        case 0x20:
+                name = "bt815a";
+                decoder->ident = V4L2_IDENT_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);
+                kfree(decoder);
+                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);
+        kfree(decoder);
+        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);