Added missing tegra files.HEADmaster

1 files changed, 222 insertions, 0 deletions

diff --git a/drivers/media/video/tda9840.c b/drivers/media/video/tda9840.c
new file mode 100644
index 00000000000..22fa8202d5c
--- /dev/null
+++ b/drivers/media/video/tda9840.c
@@ -0,0 +1,222 @@
+ /*
+    tda9840 - i2c-driver for the tda9840 by SGS Thomson
+
+    Copyright (C) 1998-2003 Michael Hunold <michael@mihu.de>
+    Copyright (C) 2008 Hans Verkuil <hverkuil@xs4all.nl>
+
+    The tda9840 is a stereo/dual sound processor with digital
+    identification. It can be found at address 0x84 on the i2c-bus.
+
+    For detailed informations download the specifications directly
+    from SGS Thomson at http://www.st.com
+
+    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/ioctl.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-chip-ident.h>
+
+MODULE_AUTHOR("Michael Hunold <michael@mihu.de>");
+MODULE_DESCRIPTION("tda9840 driver");
+MODULE_LICENSE("GPL");
+
+static int debug;
+module_param(debug, int, 0644);
+
+MODULE_PARM_DESC(debug, "Debug level (0-1)");
+
+#define SWITCH          0x00
+#define LEVEL_ADJUST    0x02
+#define STEREO_ADJUST   0x03
+#define TEST            0x04
+
+#define TDA9840_SET_MUTE                0x00
+#define TDA9840_SET_MONO                0x10
+#define TDA9840_SET_STEREO              0x2a
+#define TDA9840_SET_LANG1               0x12
+#define TDA9840_SET_LANG2               0x1e
+#define TDA9840_SET_BOTH                0x1a
+#define TDA9840_SET_BOTH_R              0x16
+#define TDA9840_SET_EXTERNAL            0x7a
+
+
+static void tda9840_write(struct v4l2_subdev *sd, u8 reg, u8 val)
+{
+        struct i2c_client *client = v4l2_get_subdevdata(sd);
+
+        if (i2c_smbus_write_byte_data(client, reg, val))
+                v4l2_dbg(1, debug, sd, "error writing %02x to %02x\n",
+                                val, reg);
+}
+
+static int tda9840_s_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *t)
+{
+        int byte;
+
+        if (t->index)
+                return -EINVAL;
+
+        switch (t->audmode) {
+        case V4L2_TUNER_MODE_STEREO:
+                byte = TDA9840_SET_STEREO;
+                break;
+        case V4L2_TUNER_MODE_LANG1_LANG2:
+                byte = TDA9840_SET_BOTH;
+                break;
+        case V4L2_TUNER_MODE_LANG1:
+                byte = TDA9840_SET_LANG1;
+                break;
+        case V4L2_TUNER_MODE_LANG2:
+                byte = TDA9840_SET_LANG2;
+                break;
+        default:
+                byte = TDA9840_SET_MONO;
+                break;
+        }
+        v4l2_dbg(1, debug, sd, "TDA9840_SWITCH: 0x%02x\n", byte);
+        tda9840_write(sd, SWITCH, byte);
+        return 0;
+}
+
+static int tda9840_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *t)
+{
+        struct i2c_client *client = v4l2_get_subdevdata(sd);
+        u8 byte;
+
+        t->rxsubchans = V4L2_TUNER_SUB_MONO;
+        if (1 != i2c_master_recv(client, &byte, 1)) {
+                v4l2_dbg(1, debug, sd,
+                        "i2c_master_recv() failed\n");
+                return -EIO;
+        }
+
+        if (byte & 0x80) {
+                v4l2_dbg(1, debug, sd,
+                        "TDA9840_DETECT: register contents invalid\n");
+                return -EINVAL;
+        }
+
+        v4l2_dbg(1, debug, sd, "TDA9840_DETECT: byte: 0x%02x\n", byte);
+
+        switch (byte & 0x60) {
+        case 0x00:
+                t->rxsubchans = V4L2_TUNER_SUB_MONO;
+                break;
+        case 0x20:
+                t->rxsubchans = V4L2_TUNER_SUB_LANG1 | V4L2_TUNER_SUB_LANG2;
+                break;
+        case 0x40:
+                t->rxsubchans = V4L2_TUNER_SUB_STEREO | V4L2_TUNER_SUB_MONO;
+                break;
+        default: /* Incorrect detect */
+                t->rxsubchans = V4L2_TUNER_MODE_MONO;
+                break;
+        }
+        return 0;
+}
+
+static int tda9840_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
+{
+        struct i2c_client *client = v4l2_get_subdevdata(sd);
+
+        return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_TDA9840, 0);
+}
+
+/* ----------------------------------------------------------------------- */
+
+static const struct v4l2_subdev_core_ops tda9840_core_ops = {
+        .g_chip_ident = tda9840_g_chip_ident,
+};
+
+static const struct v4l2_subdev_tuner_ops tda9840_tuner_ops = {
+        .s_tuner = tda9840_s_tuner,
+        .g_tuner = tda9840_g_tuner,
+};
+
+static const struct v4l2_subdev_ops tda9840_ops = {
+        .core = &tda9840_core_ops,
+        .tuner = &tda9840_tuner_ops,
+};
+
+/* ----------------------------------------------------------------------- */
+
+static int tda9840_probe(struct i2c_client *client,
+                          const struct i2c_device_id *id)
+{
+        struct v4l2_subdev *sd;
+
+        /* let's see whether this adapter can support what we need */
+        if (!i2c_check_functionality(client->adapter,
+                        I2C_FUNC_SMBUS_READ_BYTE_DATA |
+                        I2C_FUNC_SMBUS_WRITE_BYTE_DATA))
+                return -EIO;
+
+        v4l_info(client, "chip found @ 0x%x (%s)\n",
+                        client->addr << 1, client->adapter->name);
+
+        sd = kzalloc(sizeof(struct v4l2_subdev), GFP_KERNEL);
+        if (sd == NULL)
+                return -ENOMEM;
+        v4l2_i2c_subdev_init(sd, client, &tda9840_ops);
+
+        /* set initial values for level & stereo - adjustment, mode */
+        tda9840_write(sd, LEVEL_ADJUST, 0);
+        tda9840_write(sd, STEREO_ADJUST, 0);
+        tda9840_write(sd, SWITCH, TDA9840_SET_STEREO);
+        return 0;
+}
+
+static int tda9840_remove(struct i2c_client *client)
+{
+        struct v4l2_subdev *sd = i2c_get_clientdata(client);
+
+        v4l2_device_unregister_subdev(sd);
+        kfree(sd);
+        return 0;
+}
+
+static const struct i2c_device_id tda9840_id[] = {
+        { "tda9840", 0 },
+        { }
+};
+MODULE_DEVICE_TABLE(i2c, tda9840_id);
+
+static struct i2c_driver tda9840_driver = {
+        .driver = {
+                .owner  = THIS_MODULE,
+                .name   = "tda9840",
+        },
+        .probe          = tda9840_probe,
+        .remove         = tda9840_remove,
+        .id_table       = tda9840_id,
+};
+
+static __init int init_tda9840(void)
+{
+        return i2c_add_driver(&tda9840_driver);
+}
+
+static __exit void exit_tda9840(void)
+{
+        i2c_del_driver(&tda9840_driver);
+}
+
+module_init(init_tda9840);
+module_exit(exit_tda9840);