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path: root/drivers/media/radio/radio-si4713.c
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Diffstat (limited to 'drivers/media/radio/radio-si4713.c')
-rw-r--r--drivers/media/radio/radio-si4713.c367
1 files changed, 367 insertions, 0 deletions
diff --git a/drivers/media/radio/radio-si4713.c b/drivers/media/radio/radio-si4713.c
new file mode 100644
index 00000000000..65c14b70458
--- /dev/null
+++ b/drivers/media/radio/radio-si4713.c
@@ -0,0 +1,367 @@
+/*
+ * drivers/media/radio/radio-si4713.c
+ *
+ * Platform Driver for Silicon Labs Si4713 FM Radio Transmitter:
+ *
+ * Copyright (c) 2008 Instituto Nokia de Tecnologia - INdT
+ * Contact: Eduardo Valentin <eduardo.valentin@nokia.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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/version.h>
+#include <linux/platform_device.h>
+#include <linux/i2c.h>
+#include <linux/videodev2.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-common.h>
+#include <media/v4l2-ioctl.h>
+#include <media/radio-si4713.h>
+
+/* module parameters */
+static int radio_nr = -1; /* radio device minor (-1 ==> auto assign) */
+module_param(radio_nr, int, 0);
+MODULE_PARM_DESC(radio_nr,
+ "Minor number for radio device (-1 ==> auto assign)");
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Eduardo Valentin <eduardo.valentin@nokia.com>");
+MODULE_DESCRIPTION("Platform driver for Si4713 FM Radio Transmitter");
+MODULE_VERSION("0.0.1");
+
+/* Driver state struct */
+struct radio_si4713_device {
+ struct v4l2_device v4l2_dev;
+ struct video_device *radio_dev;
+};
+
+/* radio_si4713_fops - file operations interface */
+static const struct v4l2_file_operations radio_si4713_fops = {
+ .owner = THIS_MODULE,
+ .ioctl = video_ioctl2,
+};
+
+/* Video4Linux Interface */
+static int radio_si4713_fill_audout(struct v4l2_audioout *vao)
+{
+ /* TODO: check presence of audio output */
+ strlcpy(vao->name, "FM Modulator Audio Out", 32);
+
+ return 0;
+}
+
+static int radio_si4713_enumaudout(struct file *file, void *priv,
+ struct v4l2_audioout *vao)
+{
+ return radio_si4713_fill_audout(vao);
+}
+
+static int radio_si4713_g_audout(struct file *file, void *priv,
+ struct v4l2_audioout *vao)
+{
+ int rval = radio_si4713_fill_audout(vao);
+
+ vao->index = 0;
+
+ return rval;
+}
+
+static int radio_si4713_s_audout(struct file *file, void *priv,
+ struct v4l2_audioout *vao)
+{
+ return vao->index ? -EINVAL : 0;
+}
+
+/* radio_si4713_querycap - query device capabilities */
+static int radio_si4713_querycap(struct file *file, void *priv,
+ struct v4l2_capability *capability)
+{
+ struct radio_si4713_device *rsdev;
+
+ rsdev = video_get_drvdata(video_devdata(file));
+
+ strlcpy(capability->driver, "radio-si4713", sizeof(capability->driver));
+ strlcpy(capability->card, "Silicon Labs Si4713 Modulator",
+ sizeof(capability->card));
+ capability->capabilities = V4L2_CAP_MODULATOR | V4L2_CAP_RDS_OUTPUT;
+
+ return 0;
+}
+
+/* radio_si4713_queryctrl - enumerate control items */
+static int radio_si4713_queryctrl(struct file *file, void *priv,
+ struct v4l2_queryctrl *qc)
+{
+ /* Must be sorted from low to high control ID! */
+ static const u32 user_ctrls[] = {
+ V4L2_CID_USER_CLASS,
+ V4L2_CID_AUDIO_MUTE,
+ 0
+ };
+
+ /* Must be sorted from low to high control ID! */
+ static const u32 fmtx_ctrls[] = {
+ V4L2_CID_FM_TX_CLASS,
+ V4L2_CID_RDS_TX_DEVIATION,
+ V4L2_CID_RDS_TX_PI,
+ V4L2_CID_RDS_TX_PTY,
+ V4L2_CID_RDS_TX_PS_NAME,
+ V4L2_CID_RDS_TX_RADIO_TEXT,
+ V4L2_CID_AUDIO_LIMITER_ENABLED,
+ V4L2_CID_AUDIO_LIMITER_RELEASE_TIME,
+ V4L2_CID_AUDIO_LIMITER_DEVIATION,
+ V4L2_CID_AUDIO_COMPRESSION_ENABLED,
+ V4L2_CID_AUDIO_COMPRESSION_GAIN,
+ V4L2_CID_AUDIO_COMPRESSION_THRESHOLD,
+ V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME,
+ V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME,
+ V4L2_CID_PILOT_TONE_ENABLED,
+ V4L2_CID_PILOT_TONE_DEVIATION,
+ V4L2_CID_PILOT_TONE_FREQUENCY,
+ V4L2_CID_TUNE_PREEMPHASIS,
+ V4L2_CID_TUNE_POWER_LEVEL,
+ V4L2_CID_TUNE_ANTENNA_CAPACITOR,
+ 0
+ };
+ static const u32 *ctrl_classes[] = {
+ user_ctrls,
+ fmtx_ctrls,
+ NULL
+ };
+ struct radio_si4713_device *rsdev;
+
+ rsdev = video_get_drvdata(video_devdata(file));
+
+ qc->id = v4l2_ctrl_next(ctrl_classes, qc->id);
+ if (qc->id == 0)
+ return -EINVAL;
+
+ if (qc->id == V4L2_CID_USER_CLASS || qc->id == V4L2_CID_FM_TX_CLASS)
+ return v4l2_ctrl_query_fill(qc, 0, 0, 0, 0);
+
+ return v4l2_device_call_until_err(&rsdev->v4l2_dev, 0, core,
+ queryctrl, qc);
+}
+
+/*
+ * v4l2 ioctl call backs.
+ * we are just a wrapper for v4l2_sub_devs.
+ */
+static inline struct v4l2_device *get_v4l2_dev(struct file *file)
+{
+ return &((struct radio_si4713_device *)video_drvdata(file))->v4l2_dev;
+}
+
+static int radio_si4713_g_ext_ctrls(struct file *file, void *p,
+ struct v4l2_ext_controls *vecs)
+{
+ return v4l2_device_call_until_err(get_v4l2_dev(file), 0, core,
+ g_ext_ctrls, vecs);
+}
+
+static int radio_si4713_s_ext_ctrls(struct file *file, void *p,
+ struct v4l2_ext_controls *vecs)
+{
+ return v4l2_device_call_until_err(get_v4l2_dev(file), 0, core,
+ s_ext_ctrls, vecs);
+}
+
+static int radio_si4713_g_ctrl(struct file *file, void *p,
+ struct v4l2_control *vc)
+{
+ return v4l2_device_call_until_err(get_v4l2_dev(file), 0, core,
+ g_ctrl, vc);
+}
+
+static int radio_si4713_s_ctrl(struct file *file, void *p,
+ struct v4l2_control *vc)
+{
+ return v4l2_device_call_until_err(get_v4l2_dev(file), 0, core,
+ s_ctrl, vc);
+}
+
+static int radio_si4713_g_modulator(struct file *file, void *p,
+ struct v4l2_modulator *vm)
+{
+ return v4l2_device_call_until_err(get_v4l2_dev(file), 0, tuner,
+ g_modulator, vm);
+}
+
+static int radio_si4713_s_modulator(struct file *file, void *p,
+ struct v4l2_modulator *vm)
+{
+ return v4l2_device_call_until_err(get_v4l2_dev(file), 0, tuner,
+ s_modulator, vm);
+}
+
+static int radio_si4713_g_frequency(struct file *file, void *p,
+ struct v4l2_frequency *vf)
+{
+ return v4l2_device_call_until_err(get_v4l2_dev(file), 0, tuner,
+ g_frequency, vf);
+}
+
+static int radio_si4713_s_frequency(struct file *file, void *p,
+ struct v4l2_frequency *vf)
+{
+ return v4l2_device_call_until_err(get_v4l2_dev(file), 0, tuner,
+ s_frequency, vf);
+}
+
+static long radio_si4713_default(struct file *file, void *p, int cmd, void *arg)
+{
+ return v4l2_device_call_until_err(get_v4l2_dev(file), 0, core,
+ ioctl, cmd, arg);
+}
+
+static struct v4l2_ioctl_ops radio_si4713_ioctl_ops = {
+ .vidioc_enumaudout = radio_si4713_enumaudout,
+ .vidioc_g_audout = radio_si4713_g_audout,
+ .vidioc_s_audout = radio_si4713_s_audout,
+ .vidioc_querycap = radio_si4713_querycap,
+ .vidioc_queryctrl = radio_si4713_queryctrl,
+ .vidioc_g_ext_ctrls = radio_si4713_g_ext_ctrls,
+ .vidioc_s_ext_ctrls = radio_si4713_s_ext_ctrls,
+ .vidioc_g_ctrl = radio_si4713_g_ctrl,
+ .vidioc_s_ctrl = radio_si4713_s_ctrl,
+ .vidioc_g_modulator = radio_si4713_g_modulator,
+ .vidioc_s_modulator = radio_si4713_s_modulator,
+ .vidioc_g_frequency = radio_si4713_g_frequency,
+ .vidioc_s_frequency = radio_si4713_s_frequency,
+ .vidioc_default = radio_si4713_default,
+};
+
+/* radio_si4713_vdev_template - video device interface */
+static struct video_device radio_si4713_vdev_template = {
+ .fops = &radio_si4713_fops,
+ .name = "radio-si4713",
+ .release = video_device_release,
+ .ioctl_ops = &radio_si4713_ioctl_ops,
+};
+
+/* Platform driver interface */
+/* radio_si4713_pdriver_probe - probe for the device */
+static int radio_si4713_pdriver_probe(struct platform_device *pdev)
+{
+ struct radio_si4713_platform_data *pdata = pdev->dev.platform_data;
+ struct radio_si4713_device *rsdev;
+ struct i2c_adapter *adapter;
+ struct v4l2_subdev *sd;
+ int rval = 0;
+
+ if (!pdata) {
+ dev_err(&pdev->dev, "Cannot proceed without platform data.\n");
+ rval = -EINVAL;
+ goto exit;
+ }
+
+ rsdev = kzalloc(sizeof *rsdev, GFP_KERNEL);
+ if (!rsdev) {
+ dev_err(&pdev->dev, "Failed to alloc video device.\n");
+ rval = -ENOMEM;
+ goto exit;
+ }
+
+ rval = v4l2_device_register(&pdev->dev, &rsdev->v4l2_dev);
+ if (rval) {
+ dev_err(&pdev->dev, "Failed to register v4l2 device.\n");
+ goto free_rsdev;
+ }
+
+ adapter = i2c_get_adapter(pdata->i2c_bus);
+ if (!adapter) {
+ dev_err(&pdev->dev, "Cannot get i2c adapter %d\n",
+ pdata->i2c_bus);
+ rval = -ENODEV;
+ goto unregister_v4l2_dev;
+ }
+
+ sd = v4l2_i2c_new_subdev_board(&rsdev->v4l2_dev, adapter, "si4713_i2c",
+ pdata->subdev_board_info, NULL);
+ if (!sd) {
+ dev_err(&pdev->dev, "Cannot get v4l2 subdevice\n");
+ rval = -ENODEV;
+ goto unregister_v4l2_dev;
+ }
+
+ rsdev->radio_dev = video_device_alloc();
+ if (!rsdev->radio_dev) {
+ dev_err(&pdev->dev, "Failed to alloc video device.\n");
+ rval = -ENOMEM;
+ goto unregister_v4l2_dev;
+ }
+
+ memcpy(rsdev->radio_dev, &radio_si4713_vdev_template,
+ sizeof(radio_si4713_vdev_template));
+ video_set_drvdata(rsdev->radio_dev, rsdev);
+ if (video_register_device(rsdev->radio_dev, VFL_TYPE_RADIO, radio_nr)) {
+ dev_err(&pdev->dev, "Could not register video device.\n");
+ rval = -EIO;
+ goto free_vdev;
+ }
+ dev_info(&pdev->dev, "New device successfully probed\n");
+
+ goto exit;
+
+free_vdev:
+ video_device_release(rsdev->radio_dev);
+unregister_v4l2_dev:
+ v4l2_device_unregister(&rsdev->v4l2_dev);
+free_rsdev:
+ kfree(rsdev);
+exit:
+ return rval;
+}
+
+/* radio_si4713_pdriver_remove - remove the device */
+static int __exit radio_si4713_pdriver_remove(struct platform_device *pdev)
+{
+ struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
+ struct radio_si4713_device *rsdev = container_of(v4l2_dev,
+ struct radio_si4713_device,
+ v4l2_dev);
+
+ video_unregister_device(rsdev->radio_dev);
+ v4l2_device_unregister(&rsdev->v4l2_dev);
+ kfree(rsdev);
+
+ return 0;
+}
+
+static struct platform_driver radio_si4713_pdriver = {
+ .driver = {
+ .name = "radio-si4713",
+ },
+ .probe = radio_si4713_pdriver_probe,
+ .remove = __exit_p(radio_si4713_pdriver_remove),
+};
+
+/* Module Interface */
+static int __init radio_si4713_module_init(void)
+{
+ return platform_driver_register(&radio_si4713_pdriver);
+}
+
+static void __exit radio_si4713_module_exit(void)
+{
+ platform_driver_unregister(&radio_si4713_pdriver);
+}
+
+module_init(radio_si4713_module_init);
+module_exit(radio_si4713_module_exit);
+