Commit | Line | Data |
---|---|---|
8366fc39 KH |
1 | /* Miro PCM20 radio driver for Linux radio support |
2 | * (c) 1998 Ruurd Reitsma <R.A.Reitsma@wbmt.tudelft.nl> | |
3 | * Thanks to Norberto Pellici for the ACI device interface specification | |
4 | * The API part is based on the radiotrack driver by M. Kirkwood | |
5 | * This driver relies on the aci mixer provided by the snd-miro | |
6 | * ALSA driver. | |
7 | * Look there for further info... | |
8 | */ | |
9 | ||
10 | /* What ever you think about the ACI, version 0x07 is not very well! | |
11 | * I can't get frequency, 'tuner status', 'tuner flags' or mute/mono | |
12 | * conditions... Robert | |
13 | */ | |
14 | ||
15 | #include <linux/module.h> | |
16 | #include <linux/init.h> | |
17 | #include <linux/videodev2.h> | |
18 | #include <media/v4l2-device.h> | |
19 | #include <media/v4l2-ioctl.h> | |
7f51a610 | 20 | #include <media/v4l2-ctrls.h> |
f7c096f7 HV |
21 | #include <media/v4l2-fh.h> |
22 | #include <media/v4l2-event.h> | |
8366fc39 KH |
23 | #include <sound/aci.h> |
24 | ||
25 | static int radio_nr = -1; | |
26 | module_param(radio_nr, int, 0); | |
27 | MODULE_PARM_DESC(radio_nr, "Set radio device number (/dev/radioX). Default: -1 (autodetect)"); | |
28 | ||
8366fc39 KH |
29 | struct pcm20 { |
30 | struct v4l2_device v4l2_dev; | |
31 | struct video_device vdev; | |
7f51a610 | 32 | struct v4l2_ctrl_handler ctrl_handler; |
8366fc39 | 33 | unsigned long freq; |
f5e7cc4a | 34 | u32 audmode; |
8366fc39 | 35 | struct snd_miro_aci *aci; |
32958fdd | 36 | struct mutex lock; |
8366fc39 KH |
37 | }; |
38 | ||
39 | static struct pcm20 pcm20_card = { | |
f5e7cc4a HV |
40 | .freq = 87 * 16000, |
41 | .audmode = V4L2_TUNER_MODE_STEREO, | |
8366fc39 KH |
42 | }; |
43 | ||
8366fc39 KH |
44 | static int pcm20_setfreq(struct pcm20 *dev, unsigned long freq) |
45 | { | |
46 | unsigned char freql; | |
47 | unsigned char freqh; | |
48 | struct snd_miro_aci *aci = dev->aci; | |
49 | ||
8366fc39 KH |
50 | freq /= 160; |
51 | if (!(aci->aci_version == 0x07 || aci->aci_version >= 0xb0)) | |
52 | freq /= 10; /* I don't know exactly which version | |
53 | * needs this hack */ | |
54 | freql = freq & 0xff; | |
55 | freqh = freq >> 8; | |
56 | ||
8366fc39 KH |
57 | return snd_aci_cmd(aci, ACI_WRITE_TUNE, freql, freqh); |
58 | } | |
59 | ||
60 | static const struct v4l2_file_operations pcm20_fops = { | |
61 | .owner = THIS_MODULE, | |
f7c096f7 HV |
62 | .open = v4l2_fh_open, |
63 | .poll = v4l2_ctrl_poll, | |
64 | .release = v4l2_fh_release, | |
32958fdd | 65 | .unlocked_ioctl = video_ioctl2, |
8366fc39 KH |
66 | }; |
67 | ||
68 | static int vidioc_querycap(struct file *file, void *priv, | |
69 | struct v4l2_capability *v) | |
70 | { | |
f122d9a8 HV |
71 | struct pcm20 *dev = video_drvdata(file); |
72 | ||
8366fc39 KH |
73 | strlcpy(v->driver, "Miro PCM20", sizeof(v->driver)); |
74 | strlcpy(v->card, "Miro PCM20", sizeof(v->card)); | |
f122d9a8 HV |
75 | snprintf(v->bus_info, sizeof(v->bus_info), "ISA:%s", dev->v4l2_dev.name); |
76 | v->device_caps = V4L2_CAP_TUNER | V4L2_CAP_RADIO; | |
77 | v->capabilities = v->device_caps | V4L2_CAP_DEVICE_CAPS; | |
8366fc39 KH |
78 | return 0; |
79 | } | |
80 | ||
81 | static int vidioc_g_tuner(struct file *file, void *priv, | |
82 | struct v4l2_tuner *v) | |
83 | { | |
f5e7cc4a | 84 | struct pcm20 *dev = video_drvdata(file); |
9bbc5820 | 85 | int res; |
f5e7cc4a HV |
86 | |
87 | if (v->index) | |
8366fc39 KH |
88 | return -EINVAL; |
89 | strlcpy(v->name, "FM", sizeof(v->name)); | |
90 | v->type = V4L2_TUNER_RADIO; | |
91 | v->rangelow = 87*16000; | |
92 | v->rangehigh = 108*16000; | |
9bbc5820 HV |
93 | res = snd_aci_cmd(dev->aci, ACI_READ_TUNERSTATION, -1, -1); |
94 | v->signal = (res & 0x80) ? 0 : 0xffff; | |
95 | /* Note: stereo detection does not work if the audio is muted, | |
96 | it will default to mono in that case. */ | |
97 | res = snd_aci_cmd(dev->aci, ACI_READ_TUNERSTEREO, -1, -1); | |
98 | v->rxsubchans = (res & 0x40) ? V4L2_TUNER_SUB_MONO : | |
99 | V4L2_TUNER_SUB_STEREO; | |
f5e7cc4a HV |
100 | v->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO; |
101 | v->audmode = dev->audmode; | |
8366fc39 KH |
102 | return 0; |
103 | } | |
104 | ||
105 | static int vidioc_s_tuner(struct file *file, void *priv, | |
106 | struct v4l2_tuner *v) | |
107 | { | |
f5e7cc4a HV |
108 | struct pcm20 *dev = video_drvdata(file); |
109 | ||
110 | if (v->index) | |
111 | return -EINVAL; | |
112 | if (v->audmode > V4L2_TUNER_MODE_STEREO) | |
113 | v->audmode = V4L2_TUNER_MODE_STEREO; | |
114 | snd_aci_cmd(dev->aci, ACI_SET_TUNERMONO, | |
115 | v->audmode == V4L2_TUNER_MODE_MONO, -1); | |
116 | return 0; | |
8366fc39 KH |
117 | } |
118 | ||
119 | static int vidioc_g_frequency(struct file *file, void *priv, | |
120 | struct v4l2_frequency *f) | |
121 | { | |
122 | struct pcm20 *dev = video_drvdata(file); | |
123 | ||
124 | if (f->tuner != 0) | |
125 | return -EINVAL; | |
126 | ||
127 | f->type = V4L2_TUNER_RADIO; | |
128 | f->frequency = dev->freq; | |
129 | return 0; | |
130 | } | |
131 | ||
132 | ||
133 | static int vidioc_s_frequency(struct file *file, void *priv, | |
b530a447 | 134 | const struct v4l2_frequency *f) |
8366fc39 KH |
135 | { |
136 | struct pcm20 *dev = video_drvdata(file); | |
137 | ||
138 | if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO) | |
139 | return -EINVAL; | |
140 | ||
b530a447 | 141 | dev->freq = clamp_t(u32, f->frequency, 87 * 16000U, 108 * 16000U); |
f5e7cc4a | 142 | pcm20_setfreq(dev, dev->freq); |
8366fc39 KH |
143 | return 0; |
144 | } | |
145 | ||
7f51a610 | 146 | static int pcm20_s_ctrl(struct v4l2_ctrl *ctrl) |
8366fc39 | 147 | { |
7f51a610 | 148 | struct pcm20 *dev = container_of(ctrl->handler, struct pcm20, ctrl_handler); |
8366fc39 KH |
149 | |
150 | switch (ctrl->id) { | |
151 | case V4L2_CID_AUDIO_MUTE: | |
f5e7cc4a | 152 | snd_aci_cmd(dev->aci, ACI_SET_TUNERMUTE, ctrl->val, -1); |
7f51a610 | 153 | return 0; |
8366fc39 | 154 | } |
7f51a610 | 155 | return -EINVAL; |
8366fc39 KH |
156 | } |
157 | ||
8366fc39 KH |
158 | static const struct v4l2_ioctl_ops pcm20_ioctl_ops = { |
159 | .vidioc_querycap = vidioc_querycap, | |
160 | .vidioc_g_tuner = vidioc_g_tuner, | |
161 | .vidioc_s_tuner = vidioc_s_tuner, | |
162 | .vidioc_g_frequency = vidioc_g_frequency, | |
163 | .vidioc_s_frequency = vidioc_s_frequency, | |
f7c096f7 HV |
164 | .vidioc_log_status = v4l2_ctrl_log_status, |
165 | .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, | |
166 | .vidioc_unsubscribe_event = v4l2_event_unsubscribe, | |
7f51a610 HV |
167 | }; |
168 | ||
169 | static const struct v4l2_ctrl_ops pcm20_ctrl_ops = { | |
170 | .s_ctrl = pcm20_s_ctrl, | |
8366fc39 KH |
171 | }; |
172 | ||
173 | static int __init pcm20_init(void) | |
174 | { | |
175 | struct pcm20 *dev = &pcm20_card; | |
176 | struct v4l2_device *v4l2_dev = &dev->v4l2_dev; | |
7f51a610 | 177 | struct v4l2_ctrl_handler *hdl; |
8366fc39 KH |
178 | int res; |
179 | ||
180 | dev->aci = snd_aci_get_aci(); | |
181 | if (dev->aci == NULL) { | |
182 | v4l2_err(v4l2_dev, | |
183 | "you must load the snd-miro driver first!\n"); | |
184 | return -ENODEV; | |
185 | } | |
f122d9a8 | 186 | strlcpy(v4l2_dev->name, "radio-miropcm20", sizeof(v4l2_dev->name)); |
32958fdd | 187 | mutex_init(&dev->lock); |
8366fc39 KH |
188 | |
189 | res = v4l2_device_register(NULL, v4l2_dev); | |
190 | if (res < 0) { | |
191 | v4l2_err(v4l2_dev, "could not register v4l2_device\n"); | |
192 | return -EINVAL; | |
193 | } | |
194 | ||
7f51a610 HV |
195 | hdl = &dev->ctrl_handler; |
196 | v4l2_ctrl_handler_init(hdl, 1); | |
197 | v4l2_ctrl_new_std(hdl, &pcm20_ctrl_ops, | |
198 | V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1); | |
199 | v4l2_dev->ctrl_handler = hdl; | |
200 | if (hdl->error) { | |
201 | res = hdl->error; | |
202 | v4l2_err(v4l2_dev, "Could not register control\n"); | |
203 | goto err_hdl; | |
204 | } | |
8366fc39 KH |
205 | strlcpy(dev->vdev.name, v4l2_dev->name, sizeof(dev->vdev.name)); |
206 | dev->vdev.v4l2_dev = v4l2_dev; | |
207 | dev->vdev.fops = &pcm20_fops; | |
208 | dev->vdev.ioctl_ops = &pcm20_ioctl_ops; | |
209 | dev->vdev.release = video_device_release_empty; | |
32958fdd | 210 | dev->vdev.lock = &dev->lock; |
f7c096f7 | 211 | set_bit(V4L2_FL_USE_FH_PRIO, &dev->vdev.flags); |
8366fc39 | 212 | video_set_drvdata(&dev->vdev, dev); |
f5e7cc4a HV |
213 | snd_aci_cmd(dev->aci, ACI_SET_TUNERMONO, |
214 | dev->audmode == V4L2_TUNER_MODE_MONO, -1); | |
215 | pcm20_setfreq(dev, dev->freq); | |
8366fc39 KH |
216 | |
217 | if (video_register_device(&dev->vdev, VFL_TYPE_RADIO, radio_nr) < 0) | |
7f51a610 | 218 | goto err_hdl; |
8366fc39 KH |
219 | |
220 | v4l2_info(v4l2_dev, "Mirosound PCM20 Radio tuner\n"); | |
221 | return 0; | |
7f51a610 HV |
222 | err_hdl: |
223 | v4l2_ctrl_handler_free(hdl); | |
8366fc39 KH |
224 | v4l2_device_unregister(v4l2_dev); |
225 | return -EINVAL; | |
226 | } | |
227 | ||
228 | MODULE_AUTHOR("Ruurd Reitsma, Krzysztof Helt"); | |
229 | MODULE_DESCRIPTION("A driver for the Miro PCM20 radio card."); | |
230 | MODULE_LICENSE("GPL"); | |
231 | ||
232 | static void __exit pcm20_cleanup(void) | |
233 | { | |
234 | struct pcm20 *dev = &pcm20_card; | |
235 | ||
236 | video_unregister_device(&dev->vdev); | |
f5e7cc4a | 237 | snd_aci_cmd(dev->aci, ACI_SET_TUNERMUTE, 1, -1); |
7f51a610 | 238 | v4l2_ctrl_handler_free(&dev->ctrl_handler); |
8366fc39 KH |
239 | v4l2_device_unregister(&dev->v4l2_dev); |
240 | } | |
241 | ||
242 | module_init(pcm20_init); | |
243 | module_exit(pcm20_cleanup); |