summaryrefslogtreecommitdiffstats
path: root/drivers/media/i2c/vp27smpx.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/media/i2c/vp27smpx.c')
-rw-r--r--drivers/media/i2c/vp27smpx.c189
1 files changed, 189 insertions, 0 deletions
diff --git a/drivers/media/i2c/vp27smpx.c b/drivers/media/i2c/vp27smpx.c
new file mode 100644
index 0000000000..0ba3c2b680
--- /dev/null
+++ b/drivers/media/i2c/vp27smpx.c
@@ -0,0 +1,189 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * vp27smpx - driver version 0.0.1
+ *
+ * Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl>
+ *
+ * Based on a tvaudio patch from Takahiro Adachi <tadachi@tadachi-net.com>
+ * and Kazuhiko Kawakami <kazz-0@mail.goo.ne.jp>
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/ioctl.h>
+#include <linux/uaccess.h>
+#include <linux/i2c.h>
+#include <linux/videodev2.h>
+#include <media/v4l2-device.h>
+
+MODULE_DESCRIPTION("vp27smpx driver");
+MODULE_AUTHOR("Hans Verkuil");
+MODULE_LICENSE("GPL");
+
+
+/* ----------------------------------------------------------------------- */
+
+struct vp27smpx_state {
+ struct v4l2_subdev sd;
+ int radio;
+ u32 audmode;
+};
+
+static inline struct vp27smpx_state *to_state(struct v4l2_subdev *sd)
+{
+ return container_of(sd, struct vp27smpx_state, sd);
+}
+
+static void vp27smpx_set_audmode(struct v4l2_subdev *sd, u32 audmode)
+{
+ struct vp27smpx_state *state = to_state(sd);
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+ u8 data[3] = { 0x00, 0x00, 0x04 };
+
+ switch (audmode) {
+ case V4L2_TUNER_MODE_MONO:
+ case V4L2_TUNER_MODE_LANG1:
+ break;
+ case V4L2_TUNER_MODE_STEREO:
+ case V4L2_TUNER_MODE_LANG1_LANG2:
+ data[1] = 0x01;
+ break;
+ case V4L2_TUNER_MODE_LANG2:
+ data[1] = 0x02;
+ break;
+ }
+
+ if (i2c_master_send(client, data, sizeof(data)) != sizeof(data))
+ v4l2_err(sd, "I/O error setting audmode\n");
+ else
+ state->audmode = audmode;
+}
+
+static int vp27smpx_s_radio(struct v4l2_subdev *sd)
+{
+ struct vp27smpx_state *state = to_state(sd);
+
+ state->radio = 1;
+ return 0;
+}
+
+static int vp27smpx_s_std(struct v4l2_subdev *sd, v4l2_std_id norm)
+{
+ struct vp27smpx_state *state = to_state(sd);
+
+ state->radio = 0;
+ return 0;
+}
+
+static int vp27smpx_s_tuner(struct v4l2_subdev *sd, const struct v4l2_tuner *vt)
+{
+ struct vp27smpx_state *state = to_state(sd);
+
+ if (!state->radio)
+ vp27smpx_set_audmode(sd, vt->audmode);
+ return 0;
+}
+
+static int vp27smpx_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *vt)
+{
+ struct vp27smpx_state *state = to_state(sd);
+
+ if (state->radio)
+ return 0;
+ vt->audmode = state->audmode;
+ vt->capability = V4L2_TUNER_CAP_STEREO |
+ V4L2_TUNER_CAP_LANG1 | V4L2_TUNER_CAP_LANG2;
+ vt->rxsubchans = V4L2_TUNER_SUB_MONO;
+ return 0;
+}
+
+static int vp27smpx_log_status(struct v4l2_subdev *sd)
+{
+ struct vp27smpx_state *state = to_state(sd);
+
+ v4l2_info(sd, "Audio Mode: %u%s\n", state->audmode,
+ state->radio ? " (Radio)" : "");
+ return 0;
+}
+
+/* ----------------------------------------------------------------------- */
+
+static const struct v4l2_subdev_core_ops vp27smpx_core_ops = {
+ .log_status = vp27smpx_log_status,
+};
+
+static const struct v4l2_subdev_tuner_ops vp27smpx_tuner_ops = {
+ .s_radio = vp27smpx_s_radio,
+ .s_tuner = vp27smpx_s_tuner,
+ .g_tuner = vp27smpx_g_tuner,
+};
+
+static const struct v4l2_subdev_video_ops vp27smpx_video_ops = {
+ .s_std = vp27smpx_s_std,
+};
+
+static const struct v4l2_subdev_ops vp27smpx_ops = {
+ .core = &vp27smpx_core_ops,
+ .tuner = &vp27smpx_tuner_ops,
+ .video = &vp27smpx_video_ops,
+};
+
+/* ----------------------------------------------------------------------- */
+
+/* i2c implementation */
+
+/*
+ * Generic i2c probe
+ * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
+ */
+
+static int vp27smpx_probe(struct i2c_client *client)
+{
+ struct vp27smpx_state *state;
+ struct v4l2_subdev *sd;
+
+ /* Check if the adapter supports the needed features */
+ if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
+ return -EIO;
+
+ v4l_info(client, "chip found @ 0x%x (%s)\n",
+ client->addr << 1, client->adapter->name);
+
+ state = devm_kzalloc(&client->dev, sizeof(*state), GFP_KERNEL);
+ if (state == NULL)
+ return -ENOMEM;
+ sd = &state->sd;
+ v4l2_i2c_subdev_init(sd, client, &vp27smpx_ops);
+ state->audmode = V4L2_TUNER_MODE_STEREO;
+
+ /* initialize vp27smpx */
+ vp27smpx_set_audmode(sd, state->audmode);
+ return 0;
+}
+
+static void vp27smpx_remove(struct i2c_client *client)
+{
+ struct v4l2_subdev *sd = i2c_get_clientdata(client);
+
+ v4l2_device_unregister_subdev(sd);
+}
+
+/* ----------------------------------------------------------------------- */
+
+static const struct i2c_device_id vp27smpx_id[] = {
+ { "vp27smpx", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, vp27smpx_id);
+
+static struct i2c_driver vp27smpx_driver = {
+ .driver = {
+ .name = "vp27smpx",
+ },
+ .probe = vp27smpx_probe,
+ .remove = vp27smpx_remove,
+ .id_table = vp27smpx_id,
+};
+
+module_i2c_driver(vp27smpx_driver);