Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* RadioTrack II driver for Linux radio support (C) 1998 Ben Pfaff |
2 | * | |
3 | * Based on RadioTrack I/RadioReveal (C) 1997 M. Kirkwood | |
4 | * Converted to new API by Alan Cox <Alan.Cox@linux.org> | |
5 | * Various bugfixes and enhancements by Russell Kroll <rkroll@exploits.org> | |
6 | * | |
7 | * TODO: Allow for more than one of these foolish entities :-) | |
8 | * | |
9 | */ | |
10 | ||
11 | #include <linux/module.h> /* Modules */ | |
12 | #include <linux/init.h> /* Initdata */ | |
13 | #include <linux/ioport.h> /* check_region, request_region */ | |
14 | #include <linux/delay.h> /* udelay */ | |
15 | #include <asm/io.h> /* outb, outb_p */ | |
16 | #include <asm/uaccess.h> /* copy to/from user */ | |
17 | #include <linux/videodev.h> /* kernel radio structs */ | |
18 | #include <linux/config.h> /* CONFIG_RADIO_RTRACK2_PORT */ | |
19 | #include <linux/spinlock.h> | |
20 | ||
21 | #ifndef CONFIG_RADIO_RTRACK2_PORT | |
22 | #define CONFIG_RADIO_RTRACK2_PORT -1 | |
23 | #endif | |
24 | ||
25 | static int io = CONFIG_RADIO_RTRACK2_PORT; | |
26 | static int radio_nr = -1; | |
27 | static spinlock_t lock; | |
28 | ||
29 | struct rt_device | |
30 | { | |
31 | int port; | |
32 | unsigned long curfreq; | |
33 | int muted; | |
34 | }; | |
35 | ||
36 | ||
37 | /* local things */ | |
38 | ||
39 | static void rt_mute(struct rt_device *dev) | |
40 | { | |
41 | if(dev->muted) | |
42 | return; | |
43 | spin_lock(&lock); | |
44 | outb(1, io); | |
45 | spin_unlock(&lock); | |
46 | dev->muted = 1; | |
47 | } | |
48 | ||
49 | static void rt_unmute(struct rt_device *dev) | |
50 | { | |
51 | if(dev->muted == 0) | |
52 | return; | |
53 | spin_lock(&lock); | |
54 | outb(0, io); | |
55 | spin_unlock(&lock); | |
56 | dev->muted = 0; | |
57 | } | |
58 | ||
59 | static void zero(void) | |
60 | { | |
61 | outb_p(1, io); | |
62 | outb_p(3, io); | |
63 | outb_p(1, io); | |
64 | } | |
65 | ||
66 | static void one(void) | |
67 | { | |
68 | outb_p(5, io); | |
69 | outb_p(7, io); | |
70 | outb_p(5, io); | |
71 | } | |
72 | ||
73 | static int rt_setfreq(struct rt_device *dev, unsigned long freq) | |
74 | { | |
75 | int i; | |
76 | ||
77 | freq = freq / 200 + 856; | |
78 | ||
79 | spin_lock(&lock); | |
80 | ||
81 | outb_p(0xc8, io); | |
82 | outb_p(0xc9, io); | |
83 | outb_p(0xc9, io); | |
84 | ||
85 | for (i = 0; i < 10; i++) | |
86 | zero (); | |
87 | ||
88 | for (i = 14; i >= 0; i--) | |
89 | if (freq & (1 << i)) | |
90 | one (); | |
91 | else | |
92 | zero (); | |
93 | ||
94 | outb_p(0xc8, io); | |
95 | if (!dev->muted) | |
96 | outb_p(0, io); | |
97 | ||
98 | spin_unlock(&lock); | |
99 | return 0; | |
100 | } | |
101 | ||
102 | static int rt_getsigstr(struct rt_device *dev) | |
103 | { | |
104 | if (inb(io) & 2) /* bit set = no signal present */ | |
105 | return 0; | |
106 | return 1; /* signal present */ | |
107 | } | |
108 | ||
109 | static int rt_do_ioctl(struct inode *inode, struct file *file, | |
110 | unsigned int cmd, void *arg) | |
111 | { | |
112 | struct video_device *dev = video_devdata(file); | |
113 | struct rt_device *rt=dev->priv; | |
114 | ||
115 | switch(cmd) | |
116 | { | |
117 | case VIDIOCGCAP: | |
118 | { | |
119 | struct video_capability *v = arg; | |
120 | memset(v,0,sizeof(*v)); | |
121 | v->type=VID_TYPE_TUNER; | |
122 | v->channels=1; | |
123 | v->audios=1; | |
124 | strcpy(v->name, "RadioTrack II"); | |
125 | return 0; | |
126 | } | |
127 | case VIDIOCGTUNER: | |
128 | { | |
129 | struct video_tuner *v = arg; | |
130 | if(v->tuner) /* Only 1 tuner */ | |
131 | return -EINVAL; | |
132 | v->rangelow=88*16000; | |
133 | v->rangehigh=108*16000; | |
134 | v->flags=VIDEO_TUNER_LOW; | |
135 | v->mode=VIDEO_MODE_AUTO; | |
136 | v->signal=0xFFFF*rt_getsigstr(rt); | |
137 | strcpy(v->name, "FM"); | |
138 | return 0; | |
139 | } | |
140 | case VIDIOCSTUNER: | |
141 | { | |
142 | struct video_tuner *v = arg; | |
143 | if(v->tuner!=0) | |
144 | return -EINVAL; | |
145 | /* Only 1 tuner so no setting needed ! */ | |
146 | return 0; | |
147 | } | |
148 | case VIDIOCGFREQ: | |
149 | { | |
150 | unsigned long *freq = arg; | |
151 | *freq = rt->curfreq; | |
152 | return 0; | |
153 | } | |
154 | case VIDIOCSFREQ: | |
155 | { | |
156 | unsigned long *freq = arg; | |
157 | rt->curfreq = *freq; | |
158 | rt_setfreq(rt, rt->curfreq); | |
159 | return 0; | |
160 | } | |
161 | case VIDIOCGAUDIO: | |
162 | { | |
163 | struct video_audio *v = arg; | |
164 | memset(v,0, sizeof(*v)); | |
165 | v->flags|=VIDEO_AUDIO_MUTABLE; | |
166 | v->volume=1; | |
167 | v->step=65535; | |
168 | strcpy(v->name, "Radio"); | |
169 | return 0; | |
170 | } | |
171 | case VIDIOCSAUDIO: | |
172 | { | |
173 | struct video_audio *v = arg; | |
174 | if(v->audio) | |
175 | return -EINVAL; | |
176 | ||
177 | if(v->flags&VIDEO_AUDIO_MUTE) | |
178 | rt_mute(rt); | |
179 | else | |
180 | rt_unmute(rt); | |
181 | ||
182 | return 0; | |
183 | } | |
184 | default: | |
185 | return -ENOIOCTLCMD; | |
186 | } | |
187 | } | |
188 | ||
189 | static int rt_ioctl(struct inode *inode, struct file *file, | |
190 | unsigned int cmd, unsigned long arg) | |
191 | { | |
192 | return video_usercopy(inode, file, cmd, arg, rt_do_ioctl); | |
193 | } | |
194 | ||
195 | static struct rt_device rtrack2_unit; | |
196 | ||
197 | static struct file_operations rtrack2_fops = { | |
198 | .owner = THIS_MODULE, | |
199 | .open = video_exclusive_open, | |
200 | .release = video_exclusive_release, | |
201 | .ioctl = rt_ioctl, | |
202 | .llseek = no_llseek, | |
203 | }; | |
204 | ||
205 | static struct video_device rtrack2_radio= | |
206 | { | |
207 | .owner = THIS_MODULE, | |
208 | .name = "RadioTrack II radio", | |
209 | .type = VID_TYPE_TUNER, | |
210 | .hardware = VID_HARDWARE_RTRACK2, | |
211 | .fops = &rtrack2_fops, | |
212 | }; | |
213 | ||
214 | static int __init rtrack2_init(void) | |
215 | { | |
216 | if(io==-1) | |
217 | { | |
218 | printk(KERN_ERR "You must set an I/O address with io=0x20c or io=0x30c\n"); | |
219 | return -EINVAL; | |
220 | } | |
221 | if (!request_region(io, 4, "rtrack2")) | |
222 | { | |
223 | printk(KERN_ERR "rtrack2: port 0x%x already in use\n", io); | |
224 | return -EBUSY; | |
225 | } | |
226 | ||
227 | rtrack2_radio.priv=&rtrack2_unit; | |
228 | ||
229 | spin_lock_init(&lock); | |
230 | if(video_register_device(&rtrack2_radio, VFL_TYPE_RADIO, radio_nr)==-1) | |
231 | { | |
232 | release_region(io, 4); | |
233 | return -EINVAL; | |
234 | } | |
235 | ||
236 | printk(KERN_INFO "AIMSlab Radiotrack II card driver.\n"); | |
237 | ||
238 | /* mute card - prevents noisy bootups */ | |
239 | outb(1, io); | |
240 | rtrack2_unit.muted = 1; | |
241 | ||
242 | return 0; | |
243 | } | |
244 | ||
245 | MODULE_AUTHOR("Ben Pfaff"); | |
246 | MODULE_DESCRIPTION("A driver for the RadioTrack II radio card."); | |
247 | MODULE_LICENSE("GPL"); | |
248 | ||
249 | module_param(io, int, 0); | |
250 | MODULE_PARM_DESC(io, "I/O address of the RadioTrack card (0x20c or 0x30c)"); | |
251 | module_param(radio_nr, int, 0); | |
252 | ||
253 | static void __exit rtrack2_cleanup_module(void) | |
254 | { | |
255 | video_unregister_device(&rtrack2_radio); | |
256 | release_region(io,4); | |
257 | } | |
258 | ||
259 | module_init(rtrack2_init); | |
260 | module_exit(rtrack2_cleanup_module); | |
261 | ||
262 | /* | |
263 | Local variables: | |
264 | compile-command: "mmake" | |
265 | End: | |
266 | */ |