diff options
Diffstat (limited to 'sound/i2c/other/tea575x-tuner.c')
| -rw-r--r-- | sound/i2c/other/tea575x-tuner.c | 233 |
1 files changed, 233 insertions, 0 deletions
diff --git a/sound/i2c/other/tea575x-tuner.c b/sound/i2c/other/tea575x-tuner.c new file mode 100644 index 000000000000..0f05a2b9a370 --- /dev/null +++ b/sound/i2c/other/tea575x-tuner.c @@ -0,0 +1,233 @@ +/* + * ALSA driver for TEA5757/5759 Philips AM/FM radio tuner chips + * + * Copyright (c) 2004 Jaroslav Kysela <perex@suse.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@suse.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(tea575x_t *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); + tea575x_t *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(tea575x_t *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.hardware = VID_HARDWARE_RTRACK; /* FIXME: assign new number */ + 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(tea575x_t *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); |