Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* SF16FMI radio driver for Linux radio support |
2 | * heavily based on rtrack driver... | |
3 | * (c) 1997 M. Kirkwood | |
4 | * (c) 1998 Petr Vandrovec, vandrove@vc.cvut.cz | |
5 | * | |
6 | * Fitted to new interface by Alan Cox <alan.cox@linux.org> | |
7 | * Made working and cleaned up functions <mikael.hedin@irf.se> | |
8 | * Support for ISAPnP by Ladislav Michl <ladis@psi.cz> | |
9 | * | |
10 | * Notes on the hardware | |
11 | * | |
12 | * Frequency control is done digitally -- ie out(port,encodefreq(95.8)); | |
13 | * No volume control - only mute/unmute - you have to use line volume | |
14 | * control on SB-part of SF16FMI | |
4286c6f6 | 15 | * |
1da177e4 LT |
16 | */ |
17 | ||
18 | #include <linux/kernel.h> /* __setup */ | |
19 | #include <linux/module.h> /* Modules */ | |
20 | #include <linux/init.h> /* Initdata */ | |
fb911ee8 | 21 | #include <linux/ioport.h> /* request_region */ |
1da177e4 LT |
22 | #include <linux/delay.h> /* udelay */ |
23 | #include <linux/videodev.h> /* kernel radio structs */ | |
5e87efa3 | 24 | #include <media/v4l2-common.h> |
1da177e4 LT |
25 | #include <linux/isapnp.h> |
26 | #include <asm/io.h> /* outb, outb_p */ | |
27 | #include <asm/uaccess.h> /* copy to/from user */ | |
3593cab5 | 28 | #include <linux/mutex.h> |
1da177e4 LT |
29 | |
30 | struct fmi_device | |
31 | { | |
32 | int port; | |
4286c6f6 MCC |
33 | int curvol; /* 1 or 0 */ |
34 | unsigned long curfreq; /* freq in kHz */ | |
35 | __u32 flags; | |
1da177e4 LT |
36 | }; |
37 | ||
4286c6f6 | 38 | static int io = -1; |
1da177e4 LT |
39 | static int radio_nr = -1; |
40 | static struct pnp_dev *dev = NULL; | |
3593cab5 | 41 | static struct mutex lock; |
1da177e4 LT |
42 | |
43 | /* freq is in 1/16 kHz to internal number, hw precision is 50 kHz */ | |
44 | /* It is only useful to give freq in intervall of 800 (=0.05Mhz), | |
4286c6f6 | 45 | * other bits will be truncated, e.g 92.7400016 -> 92.7, but |
1da177e4 LT |
46 | * 92.7400017 -> 92.75 |
47 | */ | |
48 | #define RSF16_ENCODE(x) ((x)/800+214) | |
49 | #define RSF16_MINFREQ 87*16000 | |
50 | #define RSF16_MAXFREQ 108*16000 | |
51 | ||
52 | static void outbits(int bits, unsigned int data, int port) | |
53 | { | |
54 | while(bits--) { | |
4286c6f6 | 55 | if(data & 1) { |
1da177e4 LT |
56 | outb(5, port); |
57 | udelay(6); | |
58 | outb(7, port); | |
59 | udelay(6); | |
60 | } else { | |
61 | outb(1, port); | |
62 | udelay(6); | |
63 | outb(3, port); | |
64 | udelay(6); | |
65 | } | |
66 | data>>=1; | |
67 | } | |
68 | } | |
69 | ||
70 | static inline void fmi_mute(int port) | |
71 | { | |
3593cab5 | 72 | mutex_lock(&lock); |
1da177e4 | 73 | outb(0x00, port); |
3593cab5 | 74 | mutex_unlock(&lock); |
1da177e4 LT |
75 | } |
76 | ||
77 | static inline void fmi_unmute(int port) | |
78 | { | |
3593cab5 | 79 | mutex_lock(&lock); |
1da177e4 | 80 | outb(0x08, port); |
3593cab5 | 81 | mutex_unlock(&lock); |
1da177e4 LT |
82 | } |
83 | ||
84 | static inline int fmi_setfreq(struct fmi_device *dev) | |
85 | { | |
86 | int myport = dev->port; | |
87 | unsigned long freq = dev->curfreq; | |
88 | ||
3593cab5 | 89 | mutex_lock(&lock); |
1da177e4 LT |
90 | |
91 | outbits(16, RSF16_ENCODE(freq), myport); | |
92 | outbits(8, 0xC0, myport); | |
93 | msleep(143); /* was schedule_timeout(HZ/7) */ | |
3593cab5 | 94 | mutex_unlock(&lock); |
1da177e4 LT |
95 | if (dev->curvol) fmi_unmute(myport); |
96 | return 0; | |
97 | } | |
98 | ||
99 | static inline int fmi_getsigstr(struct fmi_device *dev) | |
100 | { | |
101 | int val; | |
102 | int res; | |
103 | int myport = dev->port; | |
104 | ||
4286c6f6 | 105 | |
3593cab5 | 106 | mutex_lock(&lock); |
1da177e4 LT |
107 | val = dev->curvol ? 0x08 : 0x00; /* unmute/mute */ |
108 | outb(val, myport); | |
109 | outb(val | 0x10, myport); | |
110 | msleep(143); /* was schedule_timeout(HZ/7) */ | |
111 | res = (int)inb(myport+1); | |
112 | outb(val, myport); | |
4286c6f6 | 113 | |
3593cab5 | 114 | mutex_unlock(&lock); |
1da177e4 LT |
115 | return (res & 2) ? 0 : 0xFFFF; |
116 | } | |
117 | ||
118 | static int fmi_do_ioctl(struct inode *inode, struct file *file, | |
119 | unsigned int cmd, void *arg) | |
120 | { | |
121 | struct video_device *dev = video_devdata(file); | |
122 | struct fmi_device *fmi=dev->priv; | |
4286c6f6 | 123 | |
1da177e4 LT |
124 | switch(cmd) |
125 | { | |
126 | case VIDIOCGCAP: | |
127 | { | |
128 | struct video_capability *v = arg; | |
129 | memset(v,0,sizeof(*v)); | |
130 | strcpy(v->name, "SF16-FMx radio"); | |
131 | v->type=VID_TYPE_TUNER; | |
132 | v->channels=1; | |
133 | v->audios=1; | |
134 | return 0; | |
135 | } | |
136 | case VIDIOCGTUNER: | |
137 | { | |
138 | struct video_tuner *v = arg; | |
139 | int mult; | |
140 | ||
141 | if(v->tuner) /* Only 1 tuner */ | |
142 | return -EINVAL; | |
143 | strcpy(v->name, "FM"); | |
144 | mult = (fmi->flags & VIDEO_TUNER_LOW) ? 1 : 1000; | |
145 | v->rangelow = RSF16_MINFREQ/mult; | |
146 | v->rangehigh = RSF16_MAXFREQ/mult; | |
147 | v->flags=fmi->flags; | |
148 | v->mode=VIDEO_MODE_AUTO; | |
149 | v->signal = fmi_getsigstr(fmi); | |
150 | return 0; | |
151 | } | |
152 | case VIDIOCSTUNER: | |
153 | { | |
154 | struct video_tuner *v = arg; | |
155 | if(v->tuner!=0) | |
156 | return -EINVAL; | |
157 | fmi->flags = v->flags & VIDEO_TUNER_LOW; | |
158 | /* Only 1 tuner so no setting needed ! */ | |
159 | return 0; | |
160 | } | |
161 | case VIDIOCGFREQ: | |
162 | { | |
163 | unsigned long *freq = arg; | |
164 | *freq = fmi->curfreq; | |
165 | if (!(fmi->flags & VIDEO_TUNER_LOW)) | |
166 | *freq /= 1000; | |
167 | return 0; | |
168 | } | |
169 | case VIDIOCSFREQ: | |
170 | { | |
171 | unsigned long *freq = arg; | |
172 | if (!(fmi->flags & VIDEO_TUNER_LOW)) | |
173 | *freq *= 1000; | |
174 | if (*freq < RSF16_MINFREQ || *freq > RSF16_MAXFREQ ) | |
175 | return -EINVAL; | |
176 | /*rounding in steps of 800 to match th freq | |
177 | that will be used */ | |
4286c6f6 | 178 | fmi->curfreq = (*freq/800)*800; |
1da177e4 LT |
179 | fmi_setfreq(fmi); |
180 | return 0; | |
181 | } | |
182 | case VIDIOCGAUDIO: | |
4286c6f6 | 183 | { |
1da177e4 LT |
184 | struct video_audio *v = arg; |
185 | memset(v,0,sizeof(*v)); | |
186 | v->flags=( (!fmi->curvol)*VIDEO_AUDIO_MUTE | VIDEO_AUDIO_MUTABLE); | |
187 | strcpy(v->name, "Radio"); | |
188 | v->mode=VIDEO_SOUND_STEREO; | |
4286c6f6 | 189 | return 0; |
1da177e4 LT |
190 | } |
191 | case VIDIOCSAUDIO: | |
192 | { | |
193 | struct video_audio *v = arg; | |
194 | if(v->audio) | |
195 | return -EINVAL; | |
196 | fmi->curvol= v->flags&VIDEO_AUDIO_MUTE ? 0 : 1; | |
4286c6f6 | 197 | fmi->curvol ? |
1da177e4 LT |
198 | fmi_unmute(fmi->port) : fmi_mute(fmi->port); |
199 | return 0; | |
200 | } | |
4286c6f6 | 201 | case VIDIOCGUNIT: |
1da177e4 | 202 | { |
4286c6f6 | 203 | struct video_unit *v = arg; |
1da177e4 LT |
204 | v->video=VIDEO_NO_UNIT; |
205 | v->vbi=VIDEO_NO_UNIT; | |
206 | v->radio=dev->minor; | |
207 | v->audio=0; /* How do we find out this??? */ | |
208 | v->teletext=VIDEO_NO_UNIT; | |
4286c6f6 | 209 | return 0; |
1da177e4 LT |
210 | } |
211 | default: | |
212 | return -ENOIOCTLCMD; | |
213 | } | |
214 | } | |
215 | ||
216 | static int fmi_ioctl(struct inode *inode, struct file *file, | |
217 | unsigned int cmd, unsigned long arg) | |
218 | { | |
219 | return video_usercopy(inode, file, cmd, arg, fmi_do_ioctl); | |
220 | } | |
221 | ||
222 | static struct fmi_device fmi_unit; | |
223 | ||
224 | static struct file_operations fmi_fops = { | |
225 | .owner = THIS_MODULE, | |
226 | .open = video_exclusive_open, | |
227 | .release = video_exclusive_release, | |
228 | .ioctl = fmi_ioctl, | |
0d0fbf81 | 229 | .compat_ioctl = v4l_compat_ioctl32, |
1da177e4 LT |
230 | .llseek = no_llseek, |
231 | }; | |
232 | ||
233 | static struct video_device fmi_radio= | |
234 | { | |
235 | .owner = THIS_MODULE, | |
236 | .name = "SF16FMx radio", | |
237 | .type = VID_TYPE_TUNER, | |
238 | .hardware = VID_HARDWARE_SF16MI, | |
239 | .fops = &fmi_fops, | |
240 | }; | |
241 | ||
242 | /* ladis: this is my card. does any other types exist? */ | |
243 | static struct isapnp_device_id id_table[] __devinitdata = { | |
244 | { ISAPNP_ANY_ID, ISAPNP_ANY_ID, | |
245 | ISAPNP_VENDOR('M','F','R'), ISAPNP_FUNCTION(0xad10), 0}, | |
246 | { ISAPNP_CARD_END, }, | |
247 | }; | |
248 | ||
249 | MODULE_DEVICE_TABLE(isapnp, id_table); | |
250 | ||
251 | static int isapnp_fmi_probe(void) | |
252 | { | |
253 | int i = 0; | |
254 | ||
255 | while (id_table[i].card_vendor != 0 && dev == NULL) { | |
256 | dev = pnp_find_dev(NULL, id_table[i].vendor, | |
257 | id_table[i].function, NULL); | |
258 | i++; | |
259 | } | |
260 | ||
261 | if (!dev) | |
262 | return -ENODEV; | |
263 | if (pnp_device_attach(dev) < 0) | |
264 | return -EAGAIN; | |
265 | if (pnp_activate_dev(dev) < 0) { | |
266 | printk ("radio-sf16fmi: PnP configure failed (out of resources?)\n"); | |
267 | pnp_device_detach(dev); | |
268 | return -ENOMEM; | |
269 | } | |
270 | if (!pnp_port_valid(dev, 0)) { | |
271 | pnp_device_detach(dev); | |
272 | return -ENODEV; | |
273 | } | |
274 | ||
275 | i = pnp_port_start(dev, 0); | |
276 | printk ("radio-sf16fmi: PnP reports card at %#x\n", i); | |
277 | ||
278 | return i; | |
279 | } | |
280 | ||
281 | static int __init fmi_init(void) | |
282 | { | |
283 | if (io < 0) | |
284 | io = isapnp_fmi_probe(); | |
285 | if (io < 0) { | |
286 | printk(KERN_ERR "radio-sf16fmi: No PnP card found.\n"); | |
287 | return io; | |
288 | } | |
289 | if (!request_region(io, 2, "radio-sf16fmi")) { | |
290 | printk(KERN_ERR "radio-sf16fmi: port 0x%x already in use\n", io); | |
291 | return -EBUSY; | |
292 | } | |
293 | ||
294 | fmi_unit.port = io; | |
295 | fmi_unit.curvol = 0; | |
296 | fmi_unit.curfreq = 0; | |
297 | fmi_unit.flags = VIDEO_TUNER_LOW; | |
298 | fmi_radio.priv = &fmi_unit; | |
4286c6f6 | 299 | |
3593cab5 | 300 | mutex_init(&lock); |
4286c6f6 | 301 | |
1da177e4 LT |
302 | if (video_register_device(&fmi_radio, VFL_TYPE_RADIO, radio_nr) == -1) { |
303 | release_region(io, 2); | |
304 | return -EINVAL; | |
305 | } | |
4286c6f6 | 306 | |
1da177e4 LT |
307 | printk(KERN_INFO "SF16FMx radio card driver at 0x%x\n", io); |
308 | /* mute card - prevents noisy bootups */ | |
309 | fmi_mute(io); | |
310 | return 0; | |
311 | } | |
312 | ||
313 | MODULE_AUTHOR("Petr Vandrovec, vandrove@vc.cvut.cz and M. Kirkwood"); | |
314 | MODULE_DESCRIPTION("A driver for the SF16MI radio."); | |
315 | MODULE_LICENSE("GPL"); | |
316 | ||
317 | module_param(io, int, 0); | |
318 | MODULE_PARM_DESC(io, "I/O address of the SF16MI card (0x284 or 0x384)"); | |
319 | module_param(radio_nr, int, 0); | |
320 | ||
321 | static void __exit fmi_cleanup_module(void) | |
322 | { | |
323 | video_unregister_device(&fmi_radio); | |
324 | release_region(io, 2); | |
325 | if (dev) | |
326 | pnp_device_detach(dev); | |
327 | } | |
328 | ||
329 | module_init(fmi_init); | |
330 | module_exit(fmi_cleanup_module); |