Added audio-related stuff used on a few multimedia boards

From: Mauro Carvalho Chehab <mchehab@infradead.org>

Those files are not part of V4L stuff. However, they are or dependent of V4L 
apis or used on some video boards.
After this patch, it will be possible to compile and test they against changes
at V4L API or drivers.

Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 233 insertions, 0 deletions

diff --git a/linux/sound/i2c/other/tea575x-tuner.c b/linux/sound/i2c/other/tea575x-tuner.c
new file mode 100644
index 000000000..1a4f39b8d
--- /dev/null
+++ b/linux/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(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.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(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);