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[/] [or1k_soc_on_altera_embedded_dev_kit/] [trunk/] [linux-2.6/] [linux-2.6.24/] [sound/] [i2c/] [other/] [tea575x-tuner.c] - Rev 17
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/* * 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 <sound/driver.h> #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);
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