[ALSA] Changed Jaroslav Kysela's e-mail from perex@suse.cz to perex@perex.cz
[linux-2.6.git] / sound / i2c / other / tea575x-tuner.c
1 /*
2  *   ALSA driver for TEA5757/5759 Philips AM/FM radio tuner chips
3  *
4  *      Copyright (c) 2004 Jaroslav Kysela <perex@perex.cz>
5  *
6  *
7  *   This program is free software; you can redistribute it and/or modify
8  *   it under the terms of the GNU General Public License as published by
9  *   the Free Software Foundation; either version 2 of the License, or
10  *   (at your option) any later version.
11  *
12  *   This program is distributed in the hope that it will be useful,
13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15  *   GNU General Public License for more details.
16  *
17  *   You should have received a copy of the GNU General Public License
18  *   along with this program; if not, write to the Free Software
19  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
20  *
21  */      
22
23 #include <sound/driver.h>
24 #include <asm/io.h>
25 #include <linux/delay.h>
26 #include <linux/interrupt.h>
27 #include <linux/init.h>
28 #include <sound/core.h>
29 #include <sound/tea575x-tuner.h>
30
31 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
32 MODULE_DESCRIPTION("Routines for control of TEA5757/5759 Philips AM/FM radio tuner chips");
33 MODULE_LICENSE("GPL");
34
35 /*
36  * definitions
37  */
38
39 #define TEA575X_BIT_SEARCH      (1<<24)         /* 1 = search action, 0 = tuned */
40 #define TEA575X_BIT_UPDOWN      (1<<23)         /* 0 = search down, 1 = search up */
41 #define TEA575X_BIT_MONO        (1<<22)         /* 0 = stereo, 1 = mono */
42 #define TEA575X_BIT_BAND_MASK   (3<<20)
43 #define TEA575X_BIT_BAND_FM     (0<<20)
44 #define TEA575X_BIT_BAND_MW     (1<<20)
45 #define TEA575X_BIT_BAND_LW     (1<<21)
46 #define TEA575X_BIT_BAND_SW     (1<<22)
47 #define TEA575X_BIT_PORT_0      (1<<19)         /* user bit */
48 #define TEA575X_BIT_PORT_1      (1<<18)         /* user bit */
49 #define TEA575X_BIT_SEARCH_MASK (3<<16)         /* search level */
50 #define TEA575X_BIT_SEARCH_5_28      (0<<16)    /* FM >5uV, AM >28uV */
51 #define TEA575X_BIT_SEARCH_10_40     (1<<16)    /* FM >10uV, AM > 40uV */
52 #define TEA575X_BIT_SEARCH_30_63     (2<<16)    /* FM >30uV, AM > 63uV */
53 #define TEA575X_BIT_SEARCH_150_1000  (3<<16)    /* FM > 150uV, AM > 1000uV */
54 #define TEA575X_BIT_DUMMY       (1<<15)         /* buffer */
55 #define TEA575X_BIT_FREQ_MASK   0x7fff
56
57 /*
58  * lowlevel part
59  */
60
61 static void snd_tea575x_set_freq(struct snd_tea575x *tea)
62 {
63         unsigned long freq;
64
65         freq = tea->freq / 16;          /* to kHz */
66         if (freq > 108000)
67                 freq = 108000;
68         if (freq < 87000)
69                 freq = 87000;
70         /* crystal fixup */
71         if (tea->tea5759)
72                 freq -= tea->freq_fixup;
73         else
74                 freq += tea->freq_fixup;
75         /* freq /= 12.5 */
76         freq *= 10;
77         freq /= 125;
78
79         tea->val &= ~TEA575X_BIT_FREQ_MASK;
80         tea->val |= freq & TEA575X_BIT_FREQ_MASK;
81         tea->ops->write(tea, tea->val);
82 }
83
84 /*
85  * Linux Video interface
86  */
87
88 static int snd_tea575x_ioctl(struct inode *inode, struct file *file,
89                              unsigned int cmd, unsigned long data)
90 {
91         struct video_device *dev = video_devdata(file);
92         struct snd_tea575x *tea = video_get_drvdata(dev);
93         void __user *arg = (void __user *)data;
94         
95         switch(cmd) {
96                 case VIDIOCGCAP:
97                 {
98                         struct video_capability v;
99                         v.type = VID_TYPE_TUNER;
100                         v.channels = 1;
101                         v.audios = 1;
102                         /* No we don't do pictures */
103                         v.maxwidth = 0;
104                         v.maxheight = 0;
105                         v.minwidth = 0;
106                         v.minheight = 0;
107                         strcpy(v.name, tea->tea5759 ? "TEA5759" : "TEA5757");
108                         if (copy_to_user(arg,&v,sizeof(v)))
109                                 return -EFAULT;
110                         return 0;
111                 }
112                 case VIDIOCGTUNER:
113                 {
114                         struct video_tuner v;
115                         if (copy_from_user(&v, arg,sizeof(v))!=0) 
116                                 return -EFAULT;
117                         if (v.tuner)    /* Only 1 tuner */ 
118                                 return -EINVAL;
119                         v.rangelow = (87*16000);
120                         v.rangehigh = (108*16000);
121                         v.flags = VIDEO_TUNER_LOW;
122                         v.mode = VIDEO_MODE_AUTO;
123                         strcpy(v.name, "FM");
124                         v.signal = 0xFFFF;
125                         if (copy_to_user(arg, &v, sizeof(v)))
126                                 return -EFAULT;
127                         return 0;
128                 }
129                 case VIDIOCSTUNER:
130                 {
131                         struct video_tuner v;
132                         if(copy_from_user(&v, arg, sizeof(v)))
133                                 return -EFAULT;
134                         if(v.tuner!=0)
135                                 return -EINVAL;
136                         /* Only 1 tuner so no setting needed ! */
137                         return 0;
138                 }
139                 case VIDIOCGFREQ:
140                         if(copy_to_user(arg, &tea->freq, sizeof(tea->freq)))
141                                 return -EFAULT;
142                         return 0;
143                 case VIDIOCSFREQ:
144                         if(copy_from_user(&tea->freq, arg, sizeof(tea->freq)))
145                                 return -EFAULT;
146                         snd_tea575x_set_freq(tea);
147                         return 0;
148                 case VIDIOCGAUDIO:
149                 {       
150                         struct video_audio v;
151                         memset(&v, 0, sizeof(v));
152                         strcpy(v.name, "Radio");
153                         if(copy_to_user(arg,&v, sizeof(v)))
154                                 return -EFAULT;
155                         return 0;                       
156                 }
157                 case VIDIOCSAUDIO:
158                 {
159                         struct video_audio v;
160                         if(copy_from_user(&v, arg, sizeof(v))) 
161                                 return -EFAULT; 
162                         if(v.audio) 
163                                 return -EINVAL;
164                         return 0;
165                 }
166                 default:
167                         return -ENOIOCTLCMD;
168         }
169 }
170
171 static void snd_tea575x_release(struct video_device *vfd)
172 {
173 }
174
175 /*
176  * initialize all the tea575x chips
177  */
178 void snd_tea575x_init(struct snd_tea575x *tea)
179 {
180         unsigned int val;
181
182         val = tea->ops->read(tea);
183         if (val == 0x1ffffff || val == 0) {
184                 snd_printk(KERN_ERR "Cannot find TEA575x chip\n");
185                 return;
186         }
187
188         memset(&tea->vd, 0, sizeof(tea->vd));
189         tea->vd.owner = tea->card->module;
190         strcpy(tea->vd.name, tea->tea5759 ? "TEA5759 radio" : "TEA5757 radio");
191         tea->vd.type = VID_TYPE_TUNER;
192         tea->vd.hardware = VID_HARDWARE_RTRACK; /* FIXME: assign new number */
193         tea->vd.release = snd_tea575x_release;
194         video_set_drvdata(&tea->vd, tea);
195         tea->vd.fops = &tea->fops;
196         tea->fops.owner = tea->card->module;
197         tea->fops.open = video_exclusive_open;
198         tea->fops.release = video_exclusive_release;
199         tea->fops.ioctl = snd_tea575x_ioctl;
200         if (video_register_device(&tea->vd, VFL_TYPE_RADIO, tea->dev_nr - 1) < 0) {
201                 snd_printk(KERN_ERR "unable to register tea575x tuner\n");
202                 return;
203         }
204         tea->vd_registered = 1;
205
206         tea->val = TEA575X_BIT_BAND_FM | TEA575X_BIT_SEARCH_10_40;
207         tea->freq = 90500 * 16;         /* 90.5Mhz default */
208
209         snd_tea575x_set_freq(tea);
210 }
211
212 void snd_tea575x_exit(struct snd_tea575x *tea)
213 {
214         if (tea->vd_registered) {
215                 video_unregister_device(&tea->vd);
216                 tea->vd_registered = 0;
217         }
218 }
219
220 static int __init alsa_tea575x_module_init(void)
221 {
222         return 0;
223 }
224         
225 static void __exit alsa_tea575x_module_exit(void)
226 {
227 }
228         
229 module_init(alsa_tea575x_module_init)
230 module_exit(alsa_tea575x_module_exit)
231
232 EXPORT_SYMBOL(snd_tea575x_init);
233 EXPORT_SYMBOL(snd_tea575x_exit);