234 lines
6.0 KiB
C
234 lines
6.0 KiB
C
/*
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* ALSA driver for TEA5757/5759 Philips AM/FM radio tuner chips
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*
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* Copyright (c) 2004 Jaroslav Kysela <perex@suse.cz>
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <sound/driver.h>
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#include <asm/io.h>
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#include <linux/delay.h>
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#include <linux/interrupt.h>
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#include <linux/init.h>
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#include <sound/core.h>
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#include <sound/tea575x-tuner.h>
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MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
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MODULE_DESCRIPTION("Routines for control of TEA5757/5759 Philips AM/FM radio tuner chips");
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MODULE_LICENSE("GPL");
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/*
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* definitions
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*/
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#define TEA575X_BIT_SEARCH (1<<24) /* 1 = search action, 0 = tuned */
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#define TEA575X_BIT_UPDOWN (1<<23) /* 0 = search down, 1 = search up */
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#define TEA575X_BIT_MONO (1<<22) /* 0 = stereo, 1 = mono */
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#define TEA575X_BIT_BAND_MASK (3<<20)
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#define TEA575X_BIT_BAND_FM (0<<20)
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#define TEA575X_BIT_BAND_MW (1<<20)
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#define TEA575X_BIT_BAND_LW (1<<21)
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#define TEA575X_BIT_BAND_SW (1<<22)
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#define TEA575X_BIT_PORT_0 (1<<19) /* user bit */
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#define TEA575X_BIT_PORT_1 (1<<18) /* user bit */
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#define TEA575X_BIT_SEARCH_MASK (3<<16) /* search level */
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#define TEA575X_BIT_SEARCH_5_28 (0<<16) /* FM >5uV, AM >28uV */
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#define TEA575X_BIT_SEARCH_10_40 (1<<16) /* FM >10uV, AM > 40uV */
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#define TEA575X_BIT_SEARCH_30_63 (2<<16) /* FM >30uV, AM > 63uV */
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#define TEA575X_BIT_SEARCH_150_1000 (3<<16) /* FM > 150uV, AM > 1000uV */
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#define TEA575X_BIT_DUMMY (1<<15) /* buffer */
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#define TEA575X_BIT_FREQ_MASK 0x7fff
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/*
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* lowlevel part
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*/
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static void snd_tea575x_set_freq(tea575x_t *tea)
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{
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unsigned long freq;
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freq = tea->freq / 16; /* to kHz */
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if (freq > 108000)
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freq = 108000;
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if (freq < 87000)
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freq = 87000;
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/* crystal fixup */
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if (tea->tea5759)
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freq -= tea->freq_fixup;
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else
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freq += tea->freq_fixup;
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/* freq /= 12.5 */
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freq *= 10;
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freq /= 125;
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tea->val &= ~TEA575X_BIT_FREQ_MASK;
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tea->val |= freq & TEA575X_BIT_FREQ_MASK;
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tea->ops->write(tea, tea->val);
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}
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/*
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* Linux Video interface
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*/
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static int snd_tea575x_ioctl(struct inode *inode, struct file *file,
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unsigned int cmd, unsigned long data)
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{
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struct video_device *dev = video_devdata(file);
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tea575x_t *tea = video_get_drvdata(dev);
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void __user *arg = (void __user *)data;
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switch(cmd) {
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case VIDIOCGCAP:
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{
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struct video_capability v;
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v.type = VID_TYPE_TUNER;
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v.channels = 1;
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v.audios = 1;
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/* No we don't do pictures */
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v.maxwidth = 0;
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v.maxheight = 0;
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v.minwidth = 0;
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v.minheight = 0;
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strcpy(v.name, tea->tea5759 ? "TEA5759" : "TEA5757");
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if (copy_to_user(arg,&v,sizeof(v)))
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return -EFAULT;
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return 0;
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}
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case VIDIOCGTUNER:
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{
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struct video_tuner v;
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if (copy_from_user(&v, arg,sizeof(v))!=0)
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return -EFAULT;
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if (v.tuner) /* Only 1 tuner */
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return -EINVAL;
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v.rangelow = (87*16000);
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v.rangehigh = (108*16000);
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v.flags = VIDEO_TUNER_LOW;
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v.mode = VIDEO_MODE_AUTO;
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strcpy(v.name, "FM");
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v.signal = 0xFFFF;
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if (copy_to_user(arg, &v, sizeof(v)))
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return -EFAULT;
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return 0;
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}
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case VIDIOCSTUNER:
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{
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struct video_tuner v;
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if(copy_from_user(&v, arg, sizeof(v)))
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return -EFAULT;
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if(v.tuner!=0)
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return -EINVAL;
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/* Only 1 tuner so no setting needed ! */
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return 0;
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}
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case VIDIOCGFREQ:
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if(copy_to_user(arg, &tea->freq, sizeof(tea->freq)))
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return -EFAULT;
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return 0;
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case VIDIOCSFREQ:
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if(copy_from_user(&tea->freq, arg, sizeof(tea->freq)))
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return -EFAULT;
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snd_tea575x_set_freq(tea);
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return 0;
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case VIDIOCGAUDIO:
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{
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struct video_audio v;
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memset(&v, 0, sizeof(v));
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strcpy(v.name, "Radio");
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if(copy_to_user(arg,&v, sizeof(v)))
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return -EFAULT;
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return 0;
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}
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case VIDIOCSAUDIO:
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{
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struct video_audio v;
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if(copy_from_user(&v, arg, sizeof(v)))
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return -EFAULT;
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if(v.audio)
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return -EINVAL;
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return 0;
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}
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default:
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return -ENOIOCTLCMD;
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}
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}
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static void snd_tea575x_release(struct video_device *vfd)
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{
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}
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/*
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* initialize all the tea575x chips
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*/
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void snd_tea575x_init(tea575x_t *tea)
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{
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unsigned int val;
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val = tea->ops->read(tea);
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if (val == 0x1ffffff || val == 0) {
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snd_printk(KERN_ERR "Cannot find TEA575x chip\n");
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return;
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}
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memset(&tea->vd, 0, sizeof(tea->vd));
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tea->vd.owner = tea->card->module;
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strcpy(tea->vd.name, tea->tea5759 ? "TEA5759 radio" : "TEA5757 radio");
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tea->vd.type = VID_TYPE_TUNER;
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tea->vd.hardware = VID_HARDWARE_RTRACK; /* FIXME: assign new number */
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tea->vd.release = snd_tea575x_release;
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video_set_drvdata(&tea->vd, tea);
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tea->vd.fops = &tea->fops;
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tea->fops.owner = tea->card->module;
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tea->fops.open = video_exclusive_open;
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tea->fops.release = video_exclusive_release;
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tea->fops.ioctl = snd_tea575x_ioctl;
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if (video_register_device(&tea->vd, VFL_TYPE_RADIO, tea->dev_nr - 1) < 0) {
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snd_printk(KERN_ERR "unable to register tea575x tuner\n");
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return;
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}
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tea->vd_registered = 1;
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tea->val = TEA575X_BIT_BAND_FM | TEA575X_BIT_SEARCH_10_40;
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tea->freq = 90500 * 16; /* 90.5Mhz default */
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snd_tea575x_set_freq(tea);
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}
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void snd_tea575x_exit(tea575x_t *tea)
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{
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if (tea->vd_registered) {
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video_unregister_device(&tea->vd);
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tea->vd_registered = 0;
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}
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}
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static int __init alsa_tea575x_module_init(void)
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{
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return 0;
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}
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static void __exit alsa_tea575x_module_exit(void)
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{
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}
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module_init(alsa_tea575x_module_init)
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module_exit(alsa_tea575x_module_exit)
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EXPORT_SYMBOL(snd_tea575x_init);
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EXPORT_SYMBOL(snd_tea575x_exit);
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