initial_commit

1 files changed, 466 insertions, 0 deletions

diff --git a/drivers/media/radio/radio-maxiradio.c b/drivers/media/radio/radio-maxiradio.c
new file mode 100644
index 00000000..e83e8400
--- /dev/null
+++ b/drivers/media/radio/radio-maxiradio.c
@@ -0,0 +1,466 @@
+/*
+ * Guillemot Maxi Radio FM 2000 PCI radio card driver for Linux
+ * (C) 2001 Dimitromanolakis Apostolos <apdim@grecian.net>
+ *
+ * Based in the radio Maestro PCI driver. Actually it uses the same chip
+ * for radio but different pci controller.
+ *
+ * I didn't have any specs I reversed engineered the protocol from
+ * the windows driver (radio.dll).
+ *
+ * The card uses the TEA5757 chip that includes a search function but it
+ * is useless as I haven't found any way to read back the frequency. If
+ * anybody does please mail me.
+ *
+ * For the pdf file see:
+ * http://www.nxp.com/acrobat_download2/expired_datasheets/TEA5757_5759_3.pdf 
+ *
+ *
+ * CHANGES:
+ *   0.75b
+ *     - better pci interface thanks to Francois Romieu <romieu@cogenit.fr>
+ *
+ *   0.75      Sun Feb  4 22:51:27 EET 2001
+ *     - tiding up
+ *     - removed support for multiple devices as it didn't work anyway
+ *
+ * BUGS:
+ *   - card unmutes if you change frequency
+ *
+ * (c) 2006, 2007 by Mauro Carvalho Chehab <mchehab@infradead.org>:
+ *	- Conversion to V4L2 API
+ *      - Uses video_ioctl2 for parsing and to add debug support
+ */
+
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/delay.h>
+#include <linux/mutex.h>
+#include <linux/pci.h>
+#include <linux/videodev2.h>
+#include <linux/version.h>      /* for KERNEL_VERSION MACRO     */
+#include <linux/io.h>
+#include <linux/slab.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-ioctl.h>
+
+MODULE_AUTHOR("Dimitromanolakis Apostolos, apdim@grecian.net");
+MODULE_DESCRIPTION("Radio driver for the Guillemot Maxi Radio FM2000 radio.");
+MODULE_LICENSE("GPL");
+
+static int radio_nr = -1;
+module_param(radio_nr, int, 0);
+
+static int debug;
+
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug, "activates debug info");
+
+#define DRIVER_VERSION	"0.77"
+
+#define RADIO_VERSION KERNEL_VERSION(0, 7, 7)
+
+#define dprintk(dev, num, fmt, arg...) \
+	v4l2_dbg(num, debug, &dev->v4l2_dev, fmt, ## arg)
+
+#ifndef PCI_VENDOR_ID_GUILLEMOT
+#define PCI_VENDOR_ID_GUILLEMOT 0x5046
+#endif
+
+#ifndef PCI_DEVICE_ID_GUILLEMOT
+#define PCI_DEVICE_ID_GUILLEMOT_MAXIRADIO 0x1001
+#endif
+
+
+/* TEA5757 pin mappings */
+static const int clk = 1, data = 2, wren = 4, mo_st = 8, power = 16;
+
+#define FREQ_LO		(87 * 16000)
+#define FREQ_HI		(108 * 16000)
+
+#define FREQ_IF         171200 /* 10.7*16000   */
+#define FREQ_STEP       200    /* 12.5*16      */
+
+/* (x==fmhz*16*1000) -> bits */
+#define FREQ2BITS(x) \
+  ((((unsigned int)(x) + FREQ_IF + (FREQ_STEP << 1)) / (FREQ_STEP << 2)) << 2)
+
+#define BITS2FREQ(x)	((x) * FREQ_STEP - FREQ_IF)
+
+
+struct maxiradio
+{
+	struct v4l2_device v4l2_dev;
+	struct video_device vdev;
+	struct pci_dev *pdev;
+
+	u16	io;	/* base of radio io */
+	u16	muted;	/* VIDEO_AUDIO_MUTE */
+	u16	stereo;	/* VIDEO_TUNER_STEREO_ON */
+	u16	tuned;	/* signal strength (0 or 0xffff) */
+
+	unsigned long freq;
+
+	struct mutex lock;
+};
+
+static inline struct maxiradio *to_maxiradio(struct v4l2_device *v4l2_dev)
+{
+	return container_of(v4l2_dev, struct maxiradio, v4l2_dev);
+}
+
+static void outbit(unsigned long bit, u16 io)
+{
+	int val = power | wren | (bit ? data : 0);
+
+	outb(val, io);
+	udelay(4);
+	outb(val | clk, io);
+	udelay(4);
+	outb(val, io);
+	udelay(4);
+}
+
+static void turn_power(struct maxiradio *dev, int p)
+{
+	if (p != 0) {
+		dprintk(dev, 1, "Radio powered on\n");
+		outb(power, dev->io);
+	} else {
+		dprintk(dev, 1, "Radio powered off\n");
+		outb(0, dev->io);
+	}
+}
+
+static void set_freq(struct maxiradio *dev, u32 freq)
+{
+	unsigned long int si;
+	int bl;
+	int io = dev->io;
+	int val = FREQ2BITS(freq);
+
+	/* TEA5757 shift register bits (see pdf) */
+
+	outbit(0, io); /* 24  search */
+	outbit(1, io); /* 23  search up/down */
+
+	outbit(0, io); /* 22  stereo/mono */
+
+	outbit(0, io); /* 21  band */
+	outbit(0, io); /* 20  band (only 00=FM works I think) */
+
+	outbit(0, io); /* 19  port ? */
+	outbit(0, io); /* 18  port ? */
+
+	outbit(0, io); /* 17  search level */
+	outbit(0, io); /* 16  search level */
+
+	si = 0x8000;
+	for (bl = 1; bl <= 16; bl++) {
+		outbit(val & si, io);
+		si >>= 1;
+	}
+
+	dprintk(dev, 1, "Radio freq set to %d.%02d MHz\n",
+				freq / 16000,
+				freq % 16000 * 100 / 16000);
+
+	turn_power(dev, 1);
+}
+
+static int get_stereo(u16 io)
+{
+	outb(power,io);
+	udelay(4);
+
+	return !(inb(io) & mo_st);
+}
+
+static int get_tune(u16 io)
+{
+	outb(power+clk,io);
+	udelay(4);
+
+	return !(inb(io) & mo_st);
+}
+
+
+static int vidioc_querycap(struct file *file, void  *priv,
+			    struct v4l2_capability *v)
+{
+	struct maxiradio *dev = video_drvdata(file);
+
+	strlcpy(v->driver, "radio-maxiradio", sizeof(v->driver));
+	strlcpy(v->card, "Maxi Radio FM2000 radio", sizeof(v->card));
+	snprintf(v->bus_info, sizeof(v->bus_info), "PCI:%s", pci_name(dev->pdev));
+	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 maxiradio *dev = video_drvdata(file);
+
+	if (v->index > 0)
+		return -EINVAL;
+
+	mutex_lock(&dev->lock);
+	strlcpy(v->name, "FM", sizeof(v->name));
+	v->type = V4L2_TUNER_RADIO;
+	v->rangelow = FREQ_LO;
+	v->rangehigh = FREQ_HI;
+	v->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
+	v->capability = V4L2_TUNER_CAP_LOW;
+	if (get_stereo(dev->io))
+		v->audmode = V4L2_TUNER_MODE_STEREO;
+	else
+		v->audmode = V4L2_TUNER_MODE_MONO;
+	v->signal = 0xffff * get_tune(dev->io);
+	mutex_unlock(&dev->lock);
+
+	return 0;
+}
+
+static int vidioc_s_tuner(struct file *file, void *priv,
+			   struct v4l2_tuner *v)
+{
+	return v->index ? -EINVAL : 0;
+}
+
+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)
+{
+	return i ? -EINVAL : 0;
+}
+
+static int vidioc_g_audio(struct file *file, void *priv,
+			   struct v4l2_audio *a)
+{
+	a->index = 0;
+	strlcpy(a->name, "Radio", sizeof(a->name));
+	a->capability = V4L2_AUDCAP_STEREO;
+	return 0;
+}
+
+
+static int vidioc_s_audio(struct file *file, void *priv,
+			   struct v4l2_audio *a)
+{
+	return a->index ? -EINVAL : 0;
+}
+
+static int vidioc_s_frequency(struct file *file, void *priv,
+			       struct v4l2_frequency *f)
+{
+	struct maxiradio *dev = video_drvdata(file);
+
+	if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
+		return -EINVAL;
+	if (f->frequency < FREQ_LO || f->frequency > FREQ_HI) {
+		dprintk(dev, 1, "radio freq (%d.%02d MHz) out of range (%d-%d)\n",
+					f->frequency / 16000,
+					f->frequency % 16000 * 100 / 16000,
+					FREQ_LO / 16000, FREQ_HI / 16000);
+
+		return -EINVAL;
+	}
+
+	mutex_lock(&dev->lock);
+	dev->freq = f->frequency;
+	set_freq(dev, dev->freq);
+	msleep(125);
+	mutex_unlock(&dev->lock);
+
+	return 0;
+}
+
+static int vidioc_g_frequency(struct file *file, void *priv,
+			       struct v4l2_frequency *f)
+{
+	struct maxiradio *dev = video_drvdata(file);
+
+	if (f->tuner != 0)
+		return -EINVAL;
+	f->type = V4L2_TUNER_RADIO;
+	f->frequency = dev->freq;
+
+	dprintk(dev, 4, "radio freq is %d.%02d MHz",
+				f->frequency / 16000,
+				f->frequency % 16000 * 100 / 16000);
+
+	return 0;
+}
+
+static int vidioc_queryctrl(struct file *file, void *priv,
+			     struct v4l2_queryctrl *qc)
+{
+	switch (qc->id) {
+	case V4L2_CID_AUDIO_MUTE:
+		return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
+	}
+	return -EINVAL;
+}
+
+static int vidioc_g_ctrl(struct file *file, void *priv,
+		struct v4l2_control *ctrl)
+{
+	struct maxiradio *dev = video_drvdata(file);
+
+	switch (ctrl->id) {
+	case V4L2_CID_AUDIO_MUTE:
+		ctrl->value = dev->muted;
+		return 0;
+	}
+
+	return -EINVAL;
+}
+
+static int vidioc_s_ctrl(struct file *file, void *priv,
+		struct v4l2_control *ctrl)
+{
+	struct maxiradio *dev = video_drvdata(file);
+
+	switch (ctrl->id) {
+	case V4L2_CID_AUDIO_MUTE:
+		mutex_lock(&dev->lock);
+		dev->muted = ctrl->value;
+		if (dev->muted)
+			turn_power(dev, 0);
+		else
+			set_freq(dev, dev->freq);
+		mutex_unlock(&dev->lock);
+		return 0;
+	}
+
+	return -EINVAL;
+}
+
+static const struct v4l2_file_operations maxiradio_fops = {
+	.owner		= THIS_MODULE,
+	.unlocked_ioctl = video_ioctl2,
+};
+
+static const struct v4l2_ioctl_ops maxiradio_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 int __devinit maxiradio_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
+{
+	struct maxiradio *dev;
+	struct v4l2_device *v4l2_dev;
+	int retval = -ENOMEM;
+
+	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+	if (dev == NULL) {
+		dev_err(&pdev->dev, "not enough memory\n");
+		return -ENOMEM;
+	}
+
+	v4l2_dev = &dev->v4l2_dev;
+	mutex_init(&dev->lock);
+	dev->pdev = pdev;
+	dev->muted = 1;
+	dev->freq = FREQ_LO;
+
+	strlcpy(v4l2_dev->name, "maxiradio", sizeof(v4l2_dev->name));
+
+	retval = v4l2_device_register(&pdev->dev, v4l2_dev);
+	if (retval < 0) {
+		v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
+		goto errfr;
+	}
+
+	if (!request_region(pci_resource_start(pdev, 0),
+			   pci_resource_len(pdev, 0), "Maxi Radio FM 2000")) {
+		v4l2_err(v4l2_dev, "can't reserve I/O ports\n");
+		goto err_out;
+	}
+
+	if (pci_enable_device(pdev))
+		goto err_out_free_region;
+
+	dev->io = pci_resource_start(pdev, 0);
+	strlcpy(dev->vdev.name, v4l2_dev->name, sizeof(dev->vdev.name));
+	dev->vdev.v4l2_dev = v4l2_dev;
+	dev->vdev.fops = &maxiradio_fops;
+	dev->vdev.ioctl_ops = &maxiradio_ioctl_ops;
+	dev->vdev.release = video_device_release_empty;
+	video_set_drvdata(&dev->vdev, dev);
+
+	if (video_register_device(&dev->vdev, VFL_TYPE_RADIO, radio_nr) < 0) {
+		v4l2_err(v4l2_dev, "can't register device!");
+		goto err_out_free_region;
+	}
+
+	v4l2_info(v4l2_dev, "version " DRIVER_VERSION "\n");
+
+	v4l2_info(v4l2_dev, "found Guillemot MAXI Radio device (io = 0x%x)\n",
+	       dev->io);
+	return 0;
+
+err_out_free_region:
+	release_region(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
+err_out:
+	v4l2_device_unregister(v4l2_dev);
+errfr:
+	kfree(dev);
+	return -ENODEV;
+}
+
+static void __devexit maxiradio_remove_one(struct pci_dev *pdev)
+{
+	struct v4l2_device *v4l2_dev = dev_get_drvdata(&pdev->dev);
+	struct maxiradio *dev = to_maxiradio(v4l2_dev);
+
+	video_unregister_device(&dev->vdev);
+	v4l2_device_unregister(&dev->v4l2_dev);
+	release_region(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
+}
+
+static struct pci_device_id maxiradio_pci_tbl[] = {
+	{ PCI_VENDOR_ID_GUILLEMOT, PCI_DEVICE_ID_GUILLEMOT_MAXIRADIO,
+		PCI_ANY_ID, PCI_ANY_ID, },
+	{ 0 }
+};
+
+MODULE_DEVICE_TABLE(pci, maxiradio_pci_tbl);
+
+static struct pci_driver maxiradio_driver = {
+	.name		= "radio-maxiradio",
+	.id_table	= maxiradio_pci_tbl,
+	.probe		= maxiradio_init_one,
+	.remove		= __devexit_p(maxiradio_remove_one),
+};
+
+static int __init maxiradio_radio_init(void)
+{
+	return pci_register_driver(&maxiradio_driver);
+}
+
+static void __exit maxiradio_radio_exit(void)
+{
+	pci_unregister_driver(&maxiradio_driver);
+}
+
+module_init(maxiradio_radio_init);
+module_exit(maxiradio_radio_exit);