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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>
20#include <sound/aci.h>
21
22static int radio_nr = -1;
23module_param(radio_nr, int, 0);
24MODULE_PARM_DESC(radio_nr, "Set radio device number (/dev/radioX). Default: -1 (autodetect)");
25
26static bool mono;
27module_param(mono, bool, 0);
28MODULE_PARM_DESC(mono, "Force tuner into mono mode.");
29
30struct pcm20 {
31 struct v4l2_device v4l2_dev;
32 struct video_device vdev;
33 unsigned long freq;
34 int muted;
35 struct snd_miro_aci *aci;
36 struct mutex lock;
37};
38
39static struct pcm20 pcm20_card = {
40 .freq = 87*16000,
41 .muted = 1,
42};
43
44static int pcm20_mute(struct pcm20 *dev, unsigned char mute)
45{
46 dev->muted = mute;
47 return snd_aci_cmd(dev->aci, ACI_SET_TUNERMUTE, mute, -1);
48}
49
50static int pcm20_stereo(struct pcm20 *dev, unsigned char stereo)
51{
52 return snd_aci_cmd(dev->aci, ACI_SET_TUNERMONO, !stereo, -1);
53}
54
55static int pcm20_setfreq(struct pcm20 *dev, unsigned long freq)
56{
57 unsigned char freql;
58 unsigned char freqh;
59 struct snd_miro_aci *aci = dev->aci;
60
61 dev->freq = freq;
62
63 freq /= 160;
64 if (!(aci->aci_version == 0x07 || aci->aci_version >= 0xb0))
65 freq /= 10; /* I don't know exactly which version
66 * needs this hack */
67 freql = freq & 0xff;
68 freqh = freq >> 8;
69
70 pcm20_stereo(dev, !mono);
71 return snd_aci_cmd(aci, ACI_WRITE_TUNE, freql, freqh);
72}
73
74static const struct v4l2_file_operations pcm20_fops = {
75 .owner = THIS_MODULE,
76 .unlocked_ioctl = video_ioctl2,
77};
78
79static int vidioc_querycap(struct file *file, void *priv,
80 struct v4l2_capability *v)
81{
82 strlcpy(v->driver, "Miro PCM20", sizeof(v->driver));
83 strlcpy(v->card, "Miro PCM20", sizeof(v->card));
84 strlcpy(v->bus_info, "ISA", sizeof(v->bus_info));
85 v->version = 0x1;
86 v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
87 return 0;
88}
89
90static int vidioc_g_tuner(struct file *file, void *priv,
91 struct v4l2_tuner *v)
92{
93 if (v->index) /* Only 1 tuner */
94 return -EINVAL;
95 strlcpy(v->name, "FM", sizeof(v->name));
96 v->type = V4L2_TUNER_RADIO;
97 v->rangelow = 87*16000;
98 v->rangehigh = 108*16000;
99 v->signal = 0xffff;
100 v->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
101 v->capability = V4L2_TUNER_CAP_LOW;
102 v->audmode = V4L2_TUNER_MODE_MONO;
103 return 0;
104}
105
106static int vidioc_s_tuner(struct file *file, void *priv,
107 struct v4l2_tuner *v)
108{
109 return v->index ? -EINVAL : 0;
110}
111
112static int vidioc_g_frequency(struct file *file, void *priv,
113 struct v4l2_frequency *f)
114{
115 struct pcm20 *dev = video_drvdata(file);
116
117 if (f->tuner != 0)
118 return -EINVAL;
119
120 f->type = V4L2_TUNER_RADIO;
121 f->frequency = dev->freq;
122 return 0;
123}
124
125
126static int vidioc_s_frequency(struct file *file, void *priv,
127 struct v4l2_frequency *f)
128{
129 struct pcm20 *dev = video_drvdata(file);
130
131 if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
132 return -EINVAL;
133
134 dev->freq = f->frequency;
135 pcm20_setfreq(dev, f->frequency);
136 return 0;
137}
138
139static int vidioc_queryctrl(struct file *file, void *priv,
140 struct v4l2_queryctrl *qc)
141{
142 switch (qc->id) {
143 case V4L2_CID_AUDIO_MUTE:
144 return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
145 }
146 return -EINVAL;
147}
148
149static int vidioc_g_ctrl(struct file *file, void *priv,
150 struct v4l2_control *ctrl)
151{
152 struct pcm20 *dev = video_drvdata(file);
153
154 switch (ctrl->id) {
155 case V4L2_CID_AUDIO_MUTE:
156 ctrl->value = dev->muted;
157 break;
158 default:
159 return -EINVAL;
160 }
161 return 0;
162}
163
164static int vidioc_s_ctrl(struct file *file, void *priv,
165 struct v4l2_control *ctrl)
166{
167 struct pcm20 *dev = video_drvdata(file);
168
169 switch (ctrl->id) {
170 case V4L2_CID_AUDIO_MUTE:
171 pcm20_mute(dev, ctrl->value);
172 break;
173 default:
174 return -EINVAL;
175 }
176 return 0;
177}
178
179static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
180{
181 *i = 0;
182 return 0;
183}
184
185static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
186{
187 return i ? -EINVAL : 0;
188}
189
190static int vidioc_g_audio(struct file *file, void *priv,
191 struct v4l2_audio *a)
192{
193 a->index = 0;
194 strlcpy(a->name, "Radio", sizeof(a->name));
195 a->capability = V4L2_AUDCAP_STEREO;
196 return 0;
197}
198
199static int vidioc_s_audio(struct file *file, void *priv,
200 struct v4l2_audio *a)
201{
202 return a->index ? -EINVAL : 0;
203}
204
205static const struct v4l2_ioctl_ops pcm20_ioctl_ops = {
206 .vidioc_querycap = vidioc_querycap,
207 .vidioc_g_tuner = vidioc_g_tuner,
208 .vidioc_s_tuner = vidioc_s_tuner,
209 .vidioc_g_frequency = vidioc_g_frequency,
210 .vidioc_s_frequency = vidioc_s_frequency,
211 .vidioc_queryctrl = vidioc_queryctrl,
212 .vidioc_g_ctrl = vidioc_g_ctrl,
213 .vidioc_s_ctrl = vidioc_s_ctrl,
214 .vidioc_g_audio = vidioc_g_audio,
215 .vidioc_s_audio = vidioc_s_audio,
216 .vidioc_g_input = vidioc_g_input,
217 .vidioc_s_input = vidioc_s_input,
218};
219
220static int __init pcm20_init(void)
221{
222 struct pcm20 *dev = &pcm20_card;
223 struct v4l2_device *v4l2_dev = &dev->v4l2_dev;
224 int res;
225
226 dev->aci = snd_aci_get_aci();
227 if (dev->aci == NULL) {
228 v4l2_err(v4l2_dev,
229 "you must load the snd-miro driver first!\n");
230 return -ENODEV;
231 }
232 strlcpy(v4l2_dev->name, "miropcm20", sizeof(v4l2_dev->name));
233 mutex_init(&dev->lock);
234
235 res = v4l2_device_register(NULL, v4l2_dev);
236 if (res < 0) {
237 v4l2_err(v4l2_dev, "could not register v4l2_device\n");
238 return -EINVAL;
239 }
240
241 strlcpy(dev->vdev.name, v4l2_dev->name, sizeof(dev->vdev.name));
242 dev->vdev.v4l2_dev = v4l2_dev;
243 dev->vdev.fops = &pcm20_fops;
244 dev->vdev.ioctl_ops = &pcm20_ioctl_ops;
245 dev->vdev.release = video_device_release_empty;
246 dev->vdev.lock = &dev->lock;
247 video_set_drvdata(&dev->vdev, dev);
248
249 if (video_register_device(&dev->vdev, VFL_TYPE_RADIO, radio_nr) < 0)
250 goto fail;
251
252 v4l2_info(v4l2_dev, "Mirosound PCM20 Radio tuner\n");
253 return 0;
254fail:
255 v4l2_device_unregister(v4l2_dev);
256 return -EINVAL;
257}
258
259MODULE_AUTHOR("Ruurd Reitsma, Krzysztof Helt");
260MODULE_DESCRIPTION("A driver for the Miro PCM20 radio card.");
261MODULE_LICENSE("GPL");
262
263static void __exit pcm20_cleanup(void)
264{
265 struct pcm20 *dev = &pcm20_card;
266
267 video_unregister_device(&dev->vdev);
268 v4l2_device_unregister(&dev->v4l2_dev);
269}
270
271module_init(pcm20_init);
272module_exit(pcm20_cleanup);