summaryrefslogtreecommitdiffstats
path: root/sound/i2c/other/tea575x-tuner.c
blob: 28a4af782f5e43943f199d77626c05f8dd2e4bac (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
/*
 *   ALSA driver for TEA5757/5759 Philips AM/FM radio tuner chips
 *
 *	Copyright (c) 2004 Jaroslav Kysela <perex@perex.cz>
 *
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 *
 */      

#include <asm/io.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <sound/core.h>
#include <sound/tea575x-tuner.h>

MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
MODULE_DESCRIPTION("Routines for control of TEA5757/5759 Philips AM/FM radio tuner chips");
MODULE_LICENSE("GPL");

/*
 * definitions
 */

#define TEA575X_BIT_SEARCH	(1<<24)		/* 1 = search action, 0 = tuned */
#define TEA575X_BIT_UPDOWN	(1<<23)		/* 0 = search down, 1 = search up */
#define TEA575X_BIT_MONO	(1<<22)		/* 0 = stereo, 1 = mono */
#define TEA575X_BIT_BAND_MASK	(3<<20)
#define TEA575X_BIT_BAND_FM	(0<<20)
#define TEA575X_BIT_BAND_MW	(1<<20)
#define TEA575X_BIT_BAND_LW	(1<<21)
#define TEA575X_BIT_BAND_SW	(1<<22)
#define TEA575X_BIT_PORT_0	(1<<19)		/* user bit */
#define TEA575X_BIT_PORT_1	(1<<18)		/* user bit */
#define TEA575X_BIT_SEARCH_MASK	(3<<16)		/* search level */
#define TEA575X_BIT_SEARCH_5_28	     (0<<16)	/* FM >5uV, AM >28uV */
#define TEA575X_BIT_SEARCH_10_40     (1<<16)	/* FM >10uV, AM > 40uV */
#define TEA575X_BIT_SEARCH_30_63     (2<<16)	/* FM >30uV, AM > 63uV */
#define TEA575X_BIT_SEARCH_150_1000  (3<<16)	/* FM > 150uV, AM > 1000uV */
#define TEA575X_BIT_DUMMY	(1<<15)		/* buffer */
#define TEA575X_BIT_FREQ_MASK	0x7fff

/*
 * lowlevel part
 */

static void snd_tea575x_set_freq(struct snd_tea575x *tea)
{
	unsigned long freq;

	freq = tea->freq / 16;		/* to kHz */
	if (freq > 108000)
		freq = 108000;
	if (freq < 87000)
		freq = 87000;
	/* crystal fixup */
	if (tea->tea5759)
		freq -= tea->freq_fixup;
	else
		freq += tea->freq_fixup;
	/* freq /= 12.5 */
	freq *= 10;
	freq /= 125;

	tea->val &= ~TEA575X_BIT_FREQ_MASK;
	tea->val |= freq & TEA575X_BIT_FREQ_MASK;
	tea->ops->write(tea, tea->val);
}

/*
 * Linux Video interface
 */

static int snd_tea575x_ioctl(struct inode *inode, struct file *file,
			     unsigned int cmd, unsigned long data)
{
	struct video_device *dev = video_devdata(file);
	struct snd_tea575x *tea = video_get_drvdata(dev);
	void __user *arg = (void __user *)data;
	
	switch(cmd) {
		case VIDIOCGCAP:
		{
			struct video_capability v;
			v.type = VID_TYPE_TUNER;
			v.channels = 1;
			v.audios = 1;
			/* No we don't do pictures */
			v.maxwidth = 0;
			v.maxheight = 0;
			v.minwidth = 0;
			v.minheight = 0;
			strcpy(v.name, tea->tea5759 ? "TEA5759" : "TEA5757");
			if (copy_to_user(arg,&v,sizeof(v)))
				return -EFAULT;
			return 0;
		}
		case VIDIOCGTUNER:
		{
			struct video_tuner v;
			if (copy_from_user(&v, arg,sizeof(v))!=0) 
				return -EFAULT;
			if (v.tuner)	/* Only 1 tuner */ 
				return -EINVAL;
			v.rangelow = (87*16000);
			v.rangehigh = (108*16000);
			v.flags = VIDEO_TUNER_LOW;
			v.mode = VIDEO_MODE_AUTO;
			strcpy(v.name, "FM");
			v.signal = 0xFFFF;
			if (copy_to_user(arg, &v, sizeof(v)))
				return -EFAULT;
			return 0;
		}
		case VIDIOCSTUNER:
		{
			struct video_tuner v;
			if(copy_from_user(&v, arg, sizeof(v)))
				return -EFAULT;
			if(v.tuner!=0)
				return -EINVAL;
			/* Only 1 tuner so no setting needed ! */
			return 0;
		}
		case VIDIOCGFREQ:
			if(copy_to_user(arg, &tea->freq, sizeof(tea->freq)))
				return -EFAULT;
			return 0;
		case VIDIOCSFREQ:
			if(copy_from_user(&tea->freq, arg, sizeof(tea->freq)))
				return -EFAULT;
			snd_tea575x_set_freq(tea);
			return 0;
		case VIDIOCGAUDIO:
		{	
			struct video_audio v;
			memset(&v, 0, sizeof(v));
			strcpy(v.name, "Radio");
			if(copy_to_user(arg,&v, sizeof(v)))
				return -EFAULT;
			return 0;			
		}
		case VIDIOCSAUDIO:
		{
			struct video_audio v;
			if(copy_from_user(&v, arg, sizeof(v))) 
				return -EFAULT;	
			if(v.audio) 
				return -EINVAL;
			return 0;
		}
		default:
			return -ENOIOCTLCMD;
	}
}

static void snd_tea575x_release(struct video_device *vfd)
{
}

/*
 * initialize all the tea575x chips
 */
void snd_tea575x_init(struct snd_tea575x *tea)
{
	unsigned int val;

	val = tea->ops->read(tea);
	if (val == 0x1ffffff || val == 0) {
		snd_printk(KERN_ERR "Cannot find TEA575x chip\n");
		return;
	}

	memset(&tea->vd, 0, sizeof(tea->vd));
	tea->vd.owner = tea->card->module;
	strcpy(tea->vd.name, tea->tea5759 ? "TEA5759 radio" : "TEA5757 radio");
	tea->vd.type = VID_TYPE_TUNER;
	tea->vd.release = snd_tea575x_release;
	video_set_drvdata(&tea->vd, tea);
	tea->vd.fops = &tea->fops;
	tea->fops.owner = tea->card->module;
	tea->fops.open = video_exclusive_open;
	tea->fops.release = video_exclusive_release;
	tea->fops.ioctl = snd_tea575x_ioctl;
	if (video_register_device(&tea->vd, VFL_TYPE_RADIO, tea->dev_nr - 1) < 0) {
		snd_printk(KERN_ERR "unable to register tea575x tuner\n");
		return;
	}
	tea->vd_registered = 1;

	tea->val = TEA575X_BIT_BAND_FM | TEA575X_BIT_SEARCH_10_40;
	tea->freq = 90500 * 16;		/* 90.5Mhz default */

	snd_tea575x_set_freq(tea);
}

void snd_tea575x_exit(struct snd_tea575x *tea)
{
	if (tea->vd_registered) {
		video_unregister_device(&tea->vd);
		tea->vd_registered = 0;
	}
}

static int __init alsa_tea575x_module_init(void)
{
	return 0;
}
        
static void __exit alsa_tea575x_module_exit(void)
{
}
        
module_init(alsa_tea575x_module_init)
module_exit(alsa_tea575x_module_exit)

EXPORT_SYMBOL(snd_tea575x_init);
EXPORT_SYMBOL(snd_tea575x_exit);
OpenPOWER on IntegriCloud