1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * radio-timb.c Timberdale FPGA Radio driver |
4 | * Copyright (c) 2009 Intel Corporation |
5 | */ |
6 | |
7 | #include <linux/io.h> |
8 | #include <media/v4l2-ioctl.h> |
9 | #include <media/v4l2-device.h> |
10 | #include <media/v4l2-ctrls.h> |
11 | #include <media/v4l2-event.h> |
12 | #include <linux/platform_device.h> |
13 | #include <linux/interrupt.h> |
14 | #include <linux/slab.h> |
15 | #include <linux/i2c.h> |
16 | #include <linux/module.h> |
17 | #include <linux/platform_data/media/timb_radio.h> |
18 | |
19 | #define DRIVER_NAME "timb-radio" |
20 | |
21 | struct timbradio { |
22 | struct timb_radio_platform_data pdata; |
23 | struct v4l2_subdev *sd_tuner; |
24 | struct v4l2_subdev *sd_dsp; |
25 | struct video_device video_dev; |
26 | struct v4l2_device v4l2_dev; |
27 | struct mutex lock; |
28 | }; |
29 | |
30 | |
31 | static int timbradio_vidioc_querycap(struct file *file, void *priv, |
32 | struct v4l2_capability *v) |
33 | { |
34 | strscpy(v->driver, DRIVER_NAME, sizeof(v->driver)); |
35 | strscpy(v->card, "Timberdale Radio" , sizeof(v->card)); |
36 | snprintf(buf: v->bus_info, size: sizeof(v->bus_info), fmt: "platform:" DRIVER_NAME); |
37 | return 0; |
38 | } |
39 | |
40 | static int timbradio_vidioc_g_tuner(struct file *file, void *priv, |
41 | struct v4l2_tuner *v) |
42 | { |
43 | struct timbradio *tr = video_drvdata(file); |
44 | return v4l2_subdev_call(tr->sd_tuner, tuner, g_tuner, v); |
45 | } |
46 | |
47 | static int timbradio_vidioc_s_tuner(struct file *file, void *priv, |
48 | const struct v4l2_tuner *v) |
49 | { |
50 | struct timbradio *tr = video_drvdata(file); |
51 | return v4l2_subdev_call(tr->sd_tuner, tuner, s_tuner, v); |
52 | } |
53 | |
54 | static int timbradio_vidioc_s_frequency(struct file *file, void *priv, |
55 | const struct v4l2_frequency *f) |
56 | { |
57 | struct timbradio *tr = video_drvdata(file); |
58 | return v4l2_subdev_call(tr->sd_tuner, tuner, s_frequency, f); |
59 | } |
60 | |
61 | static int timbradio_vidioc_g_frequency(struct file *file, void *priv, |
62 | struct v4l2_frequency *f) |
63 | { |
64 | struct timbradio *tr = video_drvdata(file); |
65 | return v4l2_subdev_call(tr->sd_tuner, tuner, g_frequency, f); |
66 | } |
67 | |
68 | static const struct v4l2_ioctl_ops timbradio_ioctl_ops = { |
69 | .vidioc_querycap = timbradio_vidioc_querycap, |
70 | .vidioc_g_tuner = timbradio_vidioc_g_tuner, |
71 | .vidioc_s_tuner = timbradio_vidioc_s_tuner, |
72 | .vidioc_g_frequency = timbradio_vidioc_g_frequency, |
73 | .vidioc_s_frequency = timbradio_vidioc_s_frequency, |
74 | .vidioc_log_status = v4l2_ctrl_log_status, |
75 | .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, |
76 | .vidioc_unsubscribe_event = v4l2_event_unsubscribe, |
77 | }; |
78 | |
79 | static const struct v4l2_file_operations timbradio_fops = { |
80 | .owner = THIS_MODULE, |
81 | .open = v4l2_fh_open, |
82 | .release = v4l2_fh_release, |
83 | .poll = v4l2_ctrl_poll, |
84 | .unlocked_ioctl = video_ioctl2, |
85 | }; |
86 | |
87 | static int timbradio_probe(struct platform_device *pdev) |
88 | { |
89 | struct timb_radio_platform_data *pdata = pdev->dev.platform_data; |
90 | struct timbradio *tr; |
91 | int err; |
92 | |
93 | if (!pdata) { |
94 | dev_err(&pdev->dev, "Platform data missing\n" ); |
95 | err = -EINVAL; |
96 | goto err; |
97 | } |
98 | |
99 | tr = devm_kzalloc(dev: &pdev->dev, size: sizeof(*tr), GFP_KERNEL); |
100 | if (!tr) { |
101 | err = -ENOMEM; |
102 | goto err; |
103 | } |
104 | |
105 | tr->pdata = *pdata; |
106 | mutex_init(&tr->lock); |
107 | |
108 | strscpy(tr->video_dev.name, "Timberdale Radio" , |
109 | sizeof(tr->video_dev.name)); |
110 | tr->video_dev.fops = &timbradio_fops; |
111 | tr->video_dev.ioctl_ops = &timbradio_ioctl_ops; |
112 | tr->video_dev.release = video_device_release_empty; |
113 | tr->video_dev.minor = -1; |
114 | tr->video_dev.lock = &tr->lock; |
115 | tr->video_dev.device_caps = V4L2_CAP_TUNER | V4L2_CAP_RADIO; |
116 | |
117 | strscpy(tr->v4l2_dev.name, DRIVER_NAME, sizeof(tr->v4l2_dev.name)); |
118 | err = v4l2_device_register(NULL, v4l2_dev: &tr->v4l2_dev); |
119 | if (err) |
120 | goto err; |
121 | |
122 | tr->video_dev.v4l2_dev = &tr->v4l2_dev; |
123 | |
124 | tr->sd_tuner = v4l2_i2c_new_subdev_board(v4l2_dev: &tr->v4l2_dev, |
125 | adapter: i2c_get_adapter(nr: pdata->i2c_adapter), info: pdata->tuner, NULL); |
126 | tr->sd_dsp = v4l2_i2c_new_subdev_board(v4l2_dev: &tr->v4l2_dev, |
127 | adapter: i2c_get_adapter(nr: pdata->i2c_adapter), info: pdata->dsp, NULL); |
128 | if (tr->sd_tuner == NULL || tr->sd_dsp == NULL) { |
129 | err = -ENODEV; |
130 | goto err_video_req; |
131 | } |
132 | |
133 | tr->v4l2_dev.ctrl_handler = tr->sd_dsp->ctrl_handler; |
134 | |
135 | err = video_register_device(vdev: &tr->video_dev, type: VFL_TYPE_RADIO, nr: -1); |
136 | if (err) { |
137 | dev_err(&pdev->dev, "Error reg video\n" ); |
138 | goto err_video_req; |
139 | } |
140 | |
141 | video_set_drvdata(vdev: &tr->video_dev, data: tr); |
142 | |
143 | platform_set_drvdata(pdev, data: tr); |
144 | return 0; |
145 | |
146 | err_video_req: |
147 | v4l2_device_unregister(v4l2_dev: &tr->v4l2_dev); |
148 | err: |
149 | dev_err(&pdev->dev, "Failed to register: %d\n" , err); |
150 | |
151 | return err; |
152 | } |
153 | |
154 | static void timbradio_remove(struct platform_device *pdev) |
155 | { |
156 | struct timbradio *tr = platform_get_drvdata(pdev); |
157 | |
158 | video_unregister_device(vdev: &tr->video_dev); |
159 | v4l2_device_unregister(v4l2_dev: &tr->v4l2_dev); |
160 | } |
161 | |
162 | static struct platform_driver timbradio_platform_driver = { |
163 | .driver = { |
164 | .name = DRIVER_NAME, |
165 | }, |
166 | .probe = timbradio_probe, |
167 | .remove_new = timbradio_remove, |
168 | }; |
169 | |
170 | module_platform_driver(timbradio_platform_driver); |
171 | |
172 | MODULE_DESCRIPTION("Timberdale Radio driver" ); |
173 | MODULE_AUTHOR("Mocean Laboratories <info@mocean-labs.com>" ); |
174 | MODULE_LICENSE("GPL v2" ); |
175 | MODULE_VERSION("0.0.2" ); |
176 | MODULE_ALIAS("platform:" DRIVER_NAME); |
177 | |