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Diffstat (limited to 'sound/i2c/other/tea575x-tuner.c')
-rw-r--r--sound/i2c/other/tea575x-tuner.c233
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 00000000000..0f05a2b9a37
--- /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);
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