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);