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-rw-r--r--sound/i2c/other/tea575x-tuner.c436
1 files changed, 436 insertions, 0 deletions
diff --git a/sound/i2c/other/tea575x-tuner.c b/sound/i2c/other/tea575x-tuner.c
new file mode 100644
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--- /dev/null
+++ b/sound/i2c/other/tea575x-tuner.c
@@ -0,0 +1,436 @@
+/*
+ * 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 <asm/io.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/version.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");
+
+static int radio_nr = -1;
+module_param(radio_nr, int, 0);
+
+#define RADIO_VERSION KERNEL_VERSION(0, 0, 2)
+#define FREQ_LO (50UL * 16000)
+#define FREQ_HI (150UL * 16000)
+
+/*
+ * 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
+
+static struct v4l2_queryctrl radio_qctrl[] = {
+ {
+ .id = V4L2_CID_AUDIO_MUTE,
+ .name = "Mute",
+ .minimum = 0,
+ .maximum = 1,
+ .default_value = 1,
+ .type = V4L2_CTRL_TYPE_BOOLEAN,
+ }
+};
+
+/*
+ * lowlevel part
+ */
+
+static void snd_tea575x_write(struct snd_tea575x *tea, unsigned int val)
+{
+ u16 l;
+ u8 data;
+
+ tea->ops->set_direction(tea, 1);
+ udelay(16);
+
+ for (l = 25; l > 0; l--) {
+ data = (val >> 24) & TEA575X_DATA;
+ val <<= 1; /* shift data */
+ tea->ops->set_pins(tea, data | TEA575X_WREN);
+ udelay(2);
+ tea->ops->set_pins(tea, data | TEA575X_WREN | TEA575X_CLK);
+ udelay(2);
+ tea->ops->set_pins(tea, data | TEA575X_WREN);
+ udelay(2);
+ }
+
+ if (!tea->mute)
+ tea->ops->set_pins(tea, 0);
+}
+
+static unsigned int snd_tea575x_read(struct snd_tea575x *tea)
+{
+ u16 l, rdata;
+ u32 data = 0;
+
+ tea->ops->set_direction(tea, 0);
+ tea->ops->set_pins(tea, 0);
+ udelay(16);
+
+ for (l = 24; l--;) {
+ tea->ops->set_pins(tea, TEA575X_CLK);
+ udelay(2);
+ if (!l)
+ tea->tuned = tea->ops->get_pins(tea) & TEA575X_MOST ? 0 : 1;
+ tea->ops->set_pins(tea, 0);
+ udelay(2);
+ data <<= 1; /* shift data */
+ rdata = tea->ops->get_pins(tea);
+ if (!l)
+ tea->stereo = (rdata & TEA575X_MOST) ? 0 : 1;
+ if (rdata & TEA575X_DATA)
+ data++;
+ udelay(2);
+ }
+
+ if (tea->mute)
+ tea->ops->set_pins(tea, TEA575X_WREN);
+
+ return data;
+}
+
+static void snd_tea575x_get_freq(struct snd_tea575x *tea)
+{
+ unsigned long freq;
+
+ freq = snd_tea575x_read(tea) & TEA575X_BIT_FREQ_MASK;
+ /* freq *= 12.5 */
+ freq *= 125;
+ freq /= 10;
+ /* crystal fixup */
+ if (tea->tea5759)
+ freq += TEA575X_FMIF;
+ else
+ freq -= TEA575X_FMIF;
+
+ tea->freq = freq * 16; /* from kHz */
+}
+
+static void snd_tea575x_set_freq(struct snd_tea575x *tea)
+{
+ unsigned long freq;
+
+ freq = clamp(tea->freq, FREQ_LO, FREQ_HI);
+ freq /= 16; /* to kHz */
+ /* crystal fixup */
+ if (tea->tea5759)
+ freq -= TEA575X_FMIF;
+ else
+ freq += TEA575X_FMIF;
+ /* freq /= 12.5 */
+ freq *= 10;
+ freq /= 125;
+
+ tea->val &= ~TEA575X_BIT_FREQ_MASK;
+ tea->val |= freq & TEA575X_BIT_FREQ_MASK;
+ snd_tea575x_write(tea, tea->val);
+}
+
+/*
+ * Linux Video interface
+ */
+
+static int vidioc_querycap(struct file *file, void *priv,
+ struct v4l2_capability *v)
+{
+ struct snd_tea575x *tea = video_drvdata(file);
+
+ strlcpy(v->driver, "tea575x-tuner", sizeof(v->driver));
+ strlcpy(v->card, tea->card, sizeof(v->card));
+ strlcat(v->card, tea->tea5759 ? " TEA5759" : " TEA5757", sizeof(v->card));
+ strlcpy(v->bus_info, tea->bus_info, sizeof(v->bus_info));
+ v->version = RADIO_VERSION;
+ v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
+ return 0;
+}
+
+static int vidioc_g_tuner(struct file *file, void *priv,
+ struct v4l2_tuner *v)
+{
+ struct snd_tea575x *tea = video_drvdata(file);
+
+ if (v->index > 0)
+ return -EINVAL;
+
+ snd_tea575x_read(tea);
+
+ strcpy(v->name, "FM");
+ v->type = V4L2_TUNER_RADIO;
+ v->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO;
+ v->rangelow = FREQ_LO;
+ v->rangehigh = FREQ_HI;
+ v->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
+ v->audmode = tea->stereo ? V4L2_TUNER_MODE_STEREO : V4L2_TUNER_MODE_MONO;
+ v->signal = tea->tuned ? 0xffff : 0;
+
+ return 0;
+}
+
+static int vidioc_s_tuner(struct file *file, void *priv,
+ struct v4l2_tuner *v)
+{
+ if (v->index > 0)
+ return -EINVAL;
+ return 0;
+}
+
+static int vidioc_g_frequency(struct file *file, void *priv,
+ struct v4l2_frequency *f)
+{
+ struct snd_tea575x *tea = video_drvdata(file);
+
+ if (f->tuner != 0)
+ return -EINVAL;
+ f->type = V4L2_TUNER_RADIO;
+ snd_tea575x_get_freq(tea);
+ f->frequency = tea->freq;
+ return 0;
+}
+
+static int vidioc_s_frequency(struct file *file, void *priv,
+ struct v4l2_frequency *f)
+{
+ struct snd_tea575x *tea = video_drvdata(file);
+
+ if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
+ return -EINVAL;
+
+ if (f->frequency < FREQ_LO || f->frequency > FREQ_HI)
+ return -EINVAL;
+
+ tea->freq = f->frequency;
+
+ snd_tea575x_set_freq(tea);
+
+ return 0;
+}
+
+static int vidioc_g_audio(struct file *file, void *priv,
+ struct v4l2_audio *a)
+{
+ if (a->index > 1)
+ return -EINVAL;
+
+ strcpy(a->name, "Radio");
+ a->capability = V4L2_AUDCAP_STEREO;
+ return 0;
+}
+
+static int vidioc_s_audio(struct file *file, void *priv,
+ struct v4l2_audio *a)
+{
+ if (a->index != 0)
+ return -EINVAL;
+ return 0;
+}
+
+static int vidioc_queryctrl(struct file *file, void *priv,
+ struct v4l2_queryctrl *qc)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
+ if (qc->id && qc->id == radio_qctrl[i].id) {
+ memcpy(qc, &(radio_qctrl[i]),
+ sizeof(*qc));
+ return 0;
+ }
+ }
+ return -EINVAL;
+}
+
+static int vidioc_g_ctrl(struct file *file, void *priv,
+ struct v4l2_control *ctrl)
+{
+ struct snd_tea575x *tea = video_drvdata(file);
+
+ switch (ctrl->id) {
+ case V4L2_CID_AUDIO_MUTE:
+ ctrl->value = tea->mute;
+ return 0;
+ }
+ return -EINVAL;
+}
+
+static int vidioc_s_ctrl(struct file *file, void *priv,
+ struct v4l2_control *ctrl)
+{
+ struct snd_tea575x *tea = video_drvdata(file);
+
+ switch (ctrl->id) {
+ case V4L2_CID_AUDIO_MUTE:
+ if (tea->mute != ctrl->value) {
+ tea->mute = ctrl->value;
+ snd_tea575x_set_freq(tea);
+ }
+ return 0;
+ }
+ return -EINVAL;
+}
+
+static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
+{
+ *i = 0;
+ return 0;
+}
+
+static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
+{
+ if (i != 0)
+ return -EINVAL;
+ return 0;
+}
+
+static int snd_tea575x_exclusive_open(struct file *file)
+{
+ struct snd_tea575x *tea = video_drvdata(file);
+
+ return test_and_set_bit(0, &tea->in_use) ? -EBUSY : 0;
+}
+
+static int snd_tea575x_exclusive_release(struct file *file)
+{
+ struct snd_tea575x *tea = video_drvdata(file);
+
+ clear_bit(0, &tea->in_use);
+ return 0;
+}
+
+static const struct v4l2_file_operations tea575x_fops = {
+ .owner = THIS_MODULE,
+ .open = snd_tea575x_exclusive_open,
+ .release = snd_tea575x_exclusive_release,
+ .ioctl = video_ioctl2,
+};
+
+static const struct v4l2_ioctl_ops tea575x_ioctl_ops = {
+ .vidioc_querycap = vidioc_querycap,
+ .vidioc_g_tuner = vidioc_g_tuner,
+ .vidioc_s_tuner = vidioc_s_tuner,
+ .vidioc_g_audio = vidioc_g_audio,
+ .vidioc_s_audio = vidioc_s_audio,
+ .vidioc_g_input = vidioc_g_input,
+ .vidioc_s_input = vidioc_s_input,
+ .vidioc_g_frequency = vidioc_g_frequency,
+ .vidioc_s_frequency = vidioc_s_frequency,
+ .vidioc_queryctrl = vidioc_queryctrl,
+ .vidioc_g_ctrl = vidioc_g_ctrl,
+ .vidioc_s_ctrl = vidioc_s_ctrl,
+};
+
+static struct video_device tea575x_radio = {
+ .name = "tea575x-tuner",
+ .fops = &tea575x_fops,
+ .ioctl_ops = &tea575x_ioctl_ops,
+ .release = video_device_release,
+};
+
+/*
+ * initialize all the tea575x chips
+ */
+int snd_tea575x_init(struct snd_tea575x *tea)
+{
+ int retval;
+ struct video_device *tea575x_radio_inst;
+
+ tea->mute = 1;
+
+ snd_tea575x_write(tea, 0x55AA);
+ if (snd_tea575x_read(tea) != 0x55AA)
+ return -ENODEV;
+
+ tea->in_use = 0;
+ tea->val = TEA575X_BIT_BAND_FM | TEA575X_BIT_SEARCH_10_40;
+ tea->freq = 90500 * 16; /* 90.5Mhz default */
+
+ tea575x_radio_inst = video_device_alloc();
+ if (tea575x_radio_inst == NULL) {
+ printk(KERN_ERR "tea575x-tuner: not enough memory\n");
+ return -ENOMEM;
+ }
+
+ memcpy(tea575x_radio_inst, &tea575x_radio, sizeof(tea575x_radio));
+
+ strcpy(tea575x_radio.name, tea->tea5759 ?
+ "TEA5759 radio" : "TEA5757 radio");
+
+ video_set_drvdata(tea575x_radio_inst, tea);
+
+ retval = video_register_device(tea575x_radio_inst,
+ VFL_TYPE_RADIO, radio_nr);
+ if (retval) {
+ printk(KERN_ERR "tea575x-tuner: can't register video device!\n");
+ kfree(tea575x_radio_inst);
+ return retval;
+ }
+
+ snd_tea575x_set_freq(tea);
+ tea->vd = tea575x_radio_inst;
+
+ return 0;
+}
+
+void snd_tea575x_exit(struct snd_tea575x *tea)
+{
+ if (tea->vd) {
+ video_unregister_device(tea->vd);
+ tea->vd = NULL;
+ }
+}
+
+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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