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