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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* RadioTrack II driver for Linux radio support (C) 1998 Ben Pfaff
Mauro Carvalho Chehab4286c6f2006-04-08 16:06:16 -03002 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07003 * Based on RadioTrack I/RadioReveal (C) 1997 M. Kirkwood
Alan Coxd9b01442008-10-27 15:13:47 -03004 * Converted to new API by Alan Cox <alan@lxorguk.ukuu.org.uk>
Linus Torvalds1da177e2005-04-16 15:20:36 -07005 * Various bugfixes and enhancements by Russell Kroll <rkroll@exploits.org>
6 *
7 * TODO: Allow for more than one of these foolish entities :-)
8 *
Mauro Carvalho Chehabf8c559f2006-08-08 09:10:02 -03009 * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
Linus Torvalds1da177e2005-04-16 15:20:36 -070010 */
11
12#include <linux/module.h> /* Modules */
13#include <linux/init.h> /* Initdata */
Peter Osterlundfb911ee2005-09-13 01:25:15 -070014#include <linux/ioport.h> /* request_region */
Linus Torvalds1da177e2005-04-16 15:20:36 -070015#include <linux/delay.h> /* udelay */
Mauro Carvalho Chehabf8c559f2006-08-08 09:10:02 -030016#include <linux/videodev2.h> /* kernel radio structs */
Hans Verkuil922c78e2009-03-06 13:52:06 -030017#include <linux/mutex.h>
Mauro Carvalho Chehabf8c559f2006-08-08 09:10:02 -030018#include <linux/version.h> /* for KERNEL_VERSION MACRO */
Hans Verkuil922c78e2009-03-06 13:52:06 -030019#include <linux/io.h> /* outb, outb_p */
Hans Verkuil922c78e2009-03-06 13:52:06 -030020#include <media/v4l2-device.h>
21#include <media/v4l2-ioctl.h>
Mauro Carvalho Chehabf8c559f2006-08-08 09:10:02 -030022
Hans Verkuil922c78e2009-03-06 13:52:06 -030023MODULE_AUTHOR("Ben Pfaff");
24MODULE_DESCRIPTION("A driver for the RadioTrack II radio card.");
25MODULE_LICENSE("GPL");
Mauro Carvalho Chehabf8c559f2006-08-08 09:10:02 -030026
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#ifndef CONFIG_RADIO_RTRACK2_PORT
28#define CONFIG_RADIO_RTRACK2_PORT -1
29#endif
30
Mauro Carvalho Chehab4286c6f2006-04-08 16:06:16 -030031static int io = CONFIG_RADIO_RTRACK2_PORT;
Linus Torvalds1da177e2005-04-16 15:20:36 -070032static int radio_nr = -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -070033
Hans Verkuil922c78e2009-03-06 13:52:06 -030034module_param(io, int, 0);
35MODULE_PARM_DESC(io, "I/O address of the RadioTrack card (0x20c or 0x30c)");
36module_param(radio_nr, int, 0);
37
38#define RADIO_VERSION KERNEL_VERSION(0, 0, 2)
39
40struct rtrack2
Linus Torvalds1da177e2005-04-16 15:20:36 -070041{
Hans Verkuil922c78e2009-03-06 13:52:06 -030042 struct v4l2_device v4l2_dev;
43 struct video_device vdev;
44 int io;
Linus Torvalds1da177e2005-04-16 15:20:36 -070045 unsigned long curfreq;
46 int muted;
Hans Verkuil922c78e2009-03-06 13:52:06 -030047 struct mutex lock;
Linus Torvalds1da177e2005-04-16 15:20:36 -070048};
49
Hans Verkuil922c78e2009-03-06 13:52:06 -030050static struct rtrack2 rtrack2_card;
51
Linus Torvalds1da177e2005-04-16 15:20:36 -070052
53/* local things */
54
Hans Verkuil922c78e2009-03-06 13:52:06 -030055static void rt_mute(struct rtrack2 *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -070056{
Hans Verkuil922c78e2009-03-06 13:52:06 -030057 if (dev->muted)
Linus Torvalds1da177e2005-04-16 15:20:36 -070058 return;
Hans Verkuil922c78e2009-03-06 13:52:06 -030059 mutex_lock(&dev->lock);
60 outb(1, dev->io);
61 mutex_unlock(&dev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -070062 dev->muted = 1;
63}
64
Hans Verkuil922c78e2009-03-06 13:52:06 -030065static void rt_unmute(struct rtrack2 *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -070066{
67 if(dev->muted == 0)
68 return;
Hans Verkuil922c78e2009-03-06 13:52:06 -030069 mutex_lock(&dev->lock);
70 outb(0, dev->io);
71 mutex_unlock(&dev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -070072 dev->muted = 0;
73}
74
Hans Verkuil922c78e2009-03-06 13:52:06 -030075static void zero(struct rtrack2 *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -070076{
Hans Verkuil922c78e2009-03-06 13:52:06 -030077 outb_p(1, dev->io);
78 outb_p(3, dev->io);
79 outb_p(1, dev->io);
Linus Torvalds1da177e2005-04-16 15:20:36 -070080}
81
Hans Verkuil922c78e2009-03-06 13:52:06 -030082static void one(struct rtrack2 *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -070083{
Hans Verkuil922c78e2009-03-06 13:52:06 -030084 outb_p(5, dev->io);
85 outb_p(7, dev->io);
86 outb_p(5, dev->io);
Linus Torvalds1da177e2005-04-16 15:20:36 -070087}
88
Hans Verkuil922c78e2009-03-06 13:52:06 -030089static int rt_setfreq(struct rtrack2 *dev, unsigned long freq)
Linus Torvalds1da177e2005-04-16 15:20:36 -070090{
91 int i;
92
Hans Verkuil922c78e2009-03-06 13:52:06 -030093 mutex_lock(&dev->lock);
94 dev->curfreq = freq;
Linus Torvalds1da177e2005-04-16 15:20:36 -070095 freq = freq / 200 + 856;
Mauro Carvalho Chehab4286c6f2006-04-08 16:06:16 -030096
Hans Verkuil922c78e2009-03-06 13:52:06 -030097 outb_p(0xc8, dev->io);
98 outb_p(0xc9, dev->io);
99 outb_p(0xc9, dev->io);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100
101 for (i = 0; i < 10; i++)
Hans Verkuil922c78e2009-03-06 13:52:06 -0300102 zero(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103
104 for (i = 14; i >= 0; i--)
105 if (freq & (1 << i))
Hans Verkuil922c78e2009-03-06 13:52:06 -0300106 one(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107 else
Hans Verkuil922c78e2009-03-06 13:52:06 -0300108 zero(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109
Hans Verkuil922c78e2009-03-06 13:52:06 -0300110 outb_p(0xc8, dev->io);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111 if (!dev->muted)
Hans Verkuil922c78e2009-03-06 13:52:06 -0300112 outb_p(0, dev->io);
Mauro Carvalho Chehab4286c6f2006-04-08 16:06:16 -0300113
Hans Verkuil922c78e2009-03-06 13:52:06 -0300114 mutex_unlock(&dev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115 return 0;
116}
117
Douglas Landgraf25f30382007-04-19 16:42:25 -0300118static int vidioc_querycap(struct file *file, void *priv,
119 struct v4l2_capability *v)
120{
121 strlcpy(v->driver, "radio-rtrack2", sizeof(v->driver));
122 strlcpy(v->card, "RadioTrack II", sizeof(v->card));
Hans Verkuil922c78e2009-03-06 13:52:06 -0300123 strlcpy(v->bus_info, "ISA", sizeof(v->bus_info));
Douglas Landgraf25f30382007-04-19 16:42:25 -0300124 v->version = RADIO_VERSION;
Hans Verkuil922c78e2009-03-06 13:52:06 -0300125 v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
Douglas Landgraf25f30382007-04-19 16:42:25 -0300126 return 0;
127}
128
129static int vidioc_s_tuner(struct file *file, void *priv,
130 struct v4l2_tuner *v)
131{
Hans Verkuil922c78e2009-03-06 13:52:06 -0300132 return v->index ? -EINVAL : 0;
Douglas Landgraf25f30382007-04-19 16:42:25 -0300133}
134
Hans Verkuil922c78e2009-03-06 13:52:06 -0300135static int rt_getsigstr(struct rtrack2 *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136{
Hans Verkuil922c78e2009-03-06 13:52:06 -0300137 int sig = 1;
138
139 mutex_lock(&dev->lock);
140 if (inb(dev->io) & 2) /* bit set = no signal present */
141 sig = 0;
142 mutex_unlock(&dev->lock);
143 return sig;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144}
145
Douglas Landgraf25f30382007-04-19 16:42:25 -0300146static int vidioc_g_tuner(struct file *file, void *priv,
147 struct v4l2_tuner *v)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148{
Hans Verkuil922c78e2009-03-06 13:52:06 -0300149 struct rtrack2 *rt = video_drvdata(file);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150
Douglas Landgraf25f30382007-04-19 16:42:25 -0300151 if (v->index > 0)
152 return -EINVAL;
Mauro Carvalho Chehabf8c559f2006-08-08 09:10:02 -0300153
Hans Verkuil922c78e2009-03-06 13:52:06 -0300154 strlcpy(v->name, "FM", sizeof(v->name));
Douglas Landgraf25f30382007-04-19 16:42:25 -0300155 v->type = V4L2_TUNER_RADIO;
Hans Verkuil922c78e2009-03-06 13:52:06 -0300156 v->rangelow = 88 * 16000;
157 v->rangehigh = 108 * 16000;
Douglas Landgraf25f30382007-04-19 16:42:25 -0300158 v->rxsubchans = V4L2_TUNER_SUB_MONO;
159 v->capability = V4L2_TUNER_CAP_LOW;
160 v->audmode = V4L2_TUNER_MODE_MONO;
Hans Verkuil922c78e2009-03-06 13:52:06 -0300161 v->signal = 0xFFFF * rt_getsigstr(rt);
Douglas Landgraf25f30382007-04-19 16:42:25 -0300162 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163}
164
Douglas Landgraf25f30382007-04-19 16:42:25 -0300165static int vidioc_s_frequency(struct file *file, void *priv,
166 struct v4l2_frequency *f)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167{
Hans Verkuil922c78e2009-03-06 13:52:06 -0300168 struct rtrack2 *rt = video_drvdata(file);
Douglas Landgraf25f30382007-04-19 16:42:25 -0300169
Hans Verkuila3a9e282009-11-27 04:33:25 -0300170 if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
171 return -EINVAL;
Hans Verkuil922c78e2009-03-06 13:52:06 -0300172 rt_setfreq(rt, f->frequency);
Douglas Landgraf25f30382007-04-19 16:42:25 -0300173 return 0;
174}
175
176static int vidioc_g_frequency(struct file *file, void *priv,
177 struct v4l2_frequency *f)
178{
Hans Verkuil922c78e2009-03-06 13:52:06 -0300179 struct rtrack2 *rt = video_drvdata(file);
Douglas Landgraf25f30382007-04-19 16:42:25 -0300180
Hans Verkuila3a9e282009-11-27 04:33:25 -0300181 if (f->tuner != 0)
182 return -EINVAL;
Douglas Landgraf25f30382007-04-19 16:42:25 -0300183 f->type = V4L2_TUNER_RADIO;
184 f->frequency = rt->curfreq;
185 return 0;
186}
187
188static int vidioc_queryctrl(struct file *file, void *priv,
189 struct v4l2_queryctrl *qc)
190{
Hans Verkuil922c78e2009-03-06 13:52:06 -0300191 switch (qc->id) {
192 case V4L2_CID_AUDIO_MUTE:
193 return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
194 case V4L2_CID_AUDIO_VOLUME:
195 return v4l2_ctrl_query_fill(qc, 0, 65535, 65535, 65535);
Douglas Landgraf25f30382007-04-19 16:42:25 -0300196 }
197 return -EINVAL;
198}
199
200static int vidioc_g_ctrl(struct file *file, void *priv,
201 struct v4l2_control *ctrl)
202{
Hans Verkuil922c78e2009-03-06 13:52:06 -0300203 struct rtrack2 *rt = video_drvdata(file);
Douglas Landgraf25f30382007-04-19 16:42:25 -0300204
205 switch (ctrl->id) {
206 case V4L2_CID_AUDIO_MUTE:
207 ctrl->value = rt->muted;
208 return 0;
209 case V4L2_CID_AUDIO_VOLUME:
210 if (rt->muted)
211 ctrl->value = 0;
212 else
213 ctrl->value = 65535;
214 return 0;
215 }
216 return -EINVAL;
217}
218
219static int vidioc_s_ctrl(struct file *file, void *priv,
220 struct v4l2_control *ctrl)
221{
Hans Verkuil922c78e2009-03-06 13:52:06 -0300222 struct rtrack2 *rt = video_drvdata(file);
Douglas Landgraf25f30382007-04-19 16:42:25 -0300223
224 switch (ctrl->id) {
225 case V4L2_CID_AUDIO_MUTE:
226 if (ctrl->value)
227 rt_mute(rt);
228 else
229 rt_unmute(rt);
230 return 0;
231 case V4L2_CID_AUDIO_VOLUME:
232 if (ctrl->value)
233 rt_unmute(rt);
234 else
235 rt_mute(rt);
236 return 0;
237 }
238 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239}
240
Douglas Landgraf8b811cf2007-04-20 06:37:36 -0300241static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
242{
243 *i = 0;
244 return 0;
245}
246
247static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
248{
Hans Verkuil922c78e2009-03-06 13:52:06 -0300249 return i ? -EINVAL : 0;
250}
251
252static int vidioc_g_audio(struct file *file, void *priv,
253 struct v4l2_audio *a)
254{
255 a->index = 0;
256 strlcpy(a->name, "Radio", sizeof(a->name));
257 a->capability = V4L2_AUDCAP_STEREO;
Douglas Landgraf8b811cf2007-04-20 06:37:36 -0300258 return 0;
259}
260
261static int vidioc_s_audio(struct file *file, void *priv,
262 struct v4l2_audio *a)
263{
Hans Verkuil922c78e2009-03-06 13:52:06 -0300264 return a->index ? -EINVAL : 0;
265}
266
Hans Verkuilbec43662008-12-30 06:58:20 -0300267static const struct v4l2_file_operations rtrack2_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268 .owner = THIS_MODULE,
Hans Verkuil32958fd2010-11-14 09:36:23 -0300269 .unlocked_ioctl = video_ioctl2,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270};
271
Hans Verkuila3998102008-07-21 02:57:38 -0300272static const struct v4l2_ioctl_ops rtrack2_ioctl_ops = {
Douglas Landgraf25f30382007-04-19 16:42:25 -0300273 .vidioc_querycap = vidioc_querycap,
274 .vidioc_g_tuner = vidioc_g_tuner,
275 .vidioc_s_tuner = vidioc_s_tuner,
276 .vidioc_g_frequency = vidioc_g_frequency,
277 .vidioc_s_frequency = vidioc_s_frequency,
278 .vidioc_queryctrl = vidioc_queryctrl,
279 .vidioc_g_ctrl = vidioc_g_ctrl,
280 .vidioc_s_ctrl = vidioc_s_ctrl,
Douglas Landgraf8b811cf2007-04-20 06:37:36 -0300281 .vidioc_g_audio = vidioc_g_audio,
282 .vidioc_s_audio = vidioc_s_audio,
283 .vidioc_g_input = vidioc_g_input,
284 .vidioc_s_input = vidioc_s_input,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285};
286
287static int __init rtrack2_init(void)
288{
Hans Verkuil922c78e2009-03-06 13:52:06 -0300289 struct rtrack2 *dev = &rtrack2_card;
290 struct v4l2_device *v4l2_dev = &dev->v4l2_dev;
291 int res;
292
293 strlcpy(v4l2_dev->name, "rtrack2", sizeof(v4l2_dev->name));
294 dev->io = io;
295 if (dev->io == -1) {
296 v4l2_err(v4l2_dev, "You must set an I/O address with io=0x20c or io=0x30c\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297 return -EINVAL;
298 }
Hans Verkuil922c78e2009-03-06 13:52:06 -0300299 if (!request_region(dev->io, 4, "rtrack2")) {
300 v4l2_err(v4l2_dev, "port 0x%x already in use\n", dev->io);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301 return -EBUSY;
302 }
303
Hans Verkuil922c78e2009-03-06 13:52:06 -0300304 res = v4l2_device_register(NULL, v4l2_dev);
305 if (res < 0) {
306 release_region(dev->io, 4);
307 v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
308 return res;
309 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310
Hans Verkuil922c78e2009-03-06 13:52:06 -0300311 strlcpy(dev->vdev.name, v4l2_dev->name, sizeof(dev->vdev.name));
312 dev->vdev.v4l2_dev = v4l2_dev;
313 dev->vdev.fops = &rtrack2_fops;
314 dev->vdev.ioctl_ops = &rtrack2_ioctl_ops;
315 dev->vdev.release = video_device_release_empty;
316 video_set_drvdata(&dev->vdev, dev);
317
Hans Verkuil32958fd2010-11-14 09:36:23 -0300318 /* mute card - prevents noisy bootups */
319 outb(1, dev->io);
320 dev->muted = 1;
321
Hans Verkuil922c78e2009-03-06 13:52:06 -0300322 mutex_init(&dev->lock);
323 if (video_register_device(&dev->vdev, VFL_TYPE_RADIO, radio_nr) < 0) {
324 v4l2_device_unregister(v4l2_dev);
325 release_region(dev->io, 4);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326 return -EINVAL;
327 }
Mauro Carvalho Chehab4286c6f2006-04-08 16:06:16 -0300328
Hans Verkuil922c78e2009-03-06 13:52:06 -0300329 v4l2_info(v4l2_dev, "AIMSlab Radiotrack II card driver.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331 return 0;
332}
333
Hans Verkuil922c78e2009-03-06 13:52:06 -0300334static void __exit rtrack2_exit(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335{
Hans Verkuil922c78e2009-03-06 13:52:06 -0300336 struct rtrack2 *dev = &rtrack2_card;
337
338 video_unregister_device(&dev->vdev);
339 v4l2_device_unregister(&dev->v4l2_dev);
340 release_region(dev->io, 4);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341}
342
343module_init(rtrack2_init);
Hans Verkuil922c78e2009-03-06 13:52:06 -0300344module_exit(rtrack2_exit);