Initial import of modified Linux 2.6.28 tree

Original upstream URL:
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git | branch linux-2.6.28.y

1 files changed, 508 insertions, 0 deletions

diff --git a/drivers/media/radio/radio-sf16fmr2.c b/drivers/media/radio/radio-sf16fmr2.c
new file mode 100644
index 0000000..b1f47c3
--- /dev/null
+++ b/drivers/media/radio/radio-sf16fmr2.c
@@ -0,0 +1,508 @@
+/* SF16FMR2 radio driver for Linux radio support
+ * heavily based on fmi driver...
+ * (c) 2000-2002 Ziglio Frediano, freddy77@angelfire.com
+ *
+ * Notes on the hardware
+ *
+ *  Frequency control is done digitally -- ie out(port,encodefreq(95.8));
+ *  No volume control - only mute/unmute - you have to use line volume
+ *
+ *  For read stereo/mono you must wait 0.1 sec after set frequency and
+ *  card unmuted so I set frequency on unmute
+ *  Signal handling seem to work only on autoscanning (not implemented)
+ *
+ *  Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
+ */
+
+#include <linux/module.h>	/* Modules 			*/
+#include <linux/init.h>		/* Initdata			*/
+#include <linux/ioport.h>	/* request_region		*/
+#include <linux/delay.h>	/* udelay			*/
+#include <asm/io.h>		/* outb, outb_p			*/
+#include <asm/uaccess.h>	/* copy to/from user		*/
+#include <linux/videodev2.h>	/* kernel radio structs		*/
+#include <media/v4l2-common.h>
+#include <media/v4l2-ioctl.h>
+#include <linux/mutex.h>
+
+static struct mutex lock;
+
+#include <linux/version.h>      /* for KERNEL_VERSION MACRO     */
+#define RADIO_VERSION KERNEL_VERSION(0,0,2)
+
+#define AUD_VOL_INDEX 1
+
+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,
+	},
+	[AUD_VOL_INDEX] = {
+		.id            = V4L2_CID_AUDIO_VOLUME,
+		.name          = "Volume",
+		.minimum       = 0,
+		.maximum       = 15,
+		.step          = 1,
+		.default_value = 0,
+		.type          = V4L2_CTRL_TYPE_INTEGER,
+	}
+};
+
+#undef DEBUG
+//#define DEBUG 1
+
+#ifdef DEBUG
+# define  debug_print(s) printk s
+#else
+# define  debug_print(s)
+#endif
+
+/* this should be static vars for module size */
+struct fmr2_device
+{
+	unsigned long in_use;
+	int port;
+	int curvol; /* 0-15 */
+	int mute;
+	int stereo; /* card is producing stereo audio */
+	unsigned long curfreq; /* freq in kHz */
+	int card_type;
+	__u32 flags;
+};
+
+static int io = 0x384;
+static int radio_nr = -1;
+
+/* hw precision is 12.5 kHz
+ * It is only useful to give freq in intervall of 200 (=0.0125Mhz),
+ * other bits will be truncated
+ */
+#define RSF16_ENCODE(x)	((x)/200+856)
+#define RSF16_MINFREQ 87*16000
+#define RSF16_MAXFREQ 108*16000
+
+static inline void wait(int n,int port)
+{
+	for (;n;--n) inb(port);
+}
+
+static void outbits(int bits, unsigned int data, int nWait, int port)
+{
+	int bit;
+	for(;--bits>=0;) {
+		bit = (data>>bits) & 1;
+		outb(bit,port);
+		wait(nWait,port);
+		outb(bit|2,port);
+		wait(nWait,port);
+		outb(bit,port);
+		wait(nWait,port);
+	}
+}
+
+static inline void fmr2_mute(int port)
+{
+	outb(0x00, port);
+	wait(4,port);
+}
+
+static inline void fmr2_unmute(int port)
+{
+	outb(0x04, port);
+	wait(4,port);
+}
+
+static inline int fmr2_stereo_mode(int port)
+{
+	int n = inb(port);
+	outb(6,port);
+	inb(port);
+	n = ((n>>3)&1)^1;
+	debug_print((KERN_DEBUG "stereo: %d\n", n));
+	return n;
+}
+
+static int fmr2_product_info(struct fmr2_device *dev)
+{
+	int n = inb(dev->port);
+	n &= 0xC1;
+	if (n == 0)
+	{
+		/* this should support volume set */
+		dev->card_type = 12;
+		return 0;
+	}
+	/* not volume (mine is 11) */
+	dev->card_type = (n==128)?11:0;
+	return n;
+}
+
+static inline int fmr2_getsigstr(struct fmr2_device *dev)
+{
+	/* !!! work only if scanning freq */
+	int port = dev->port, res = 0xffff;
+	outb(5,port);
+	wait(4,port);
+	if (!(inb(port)&1)) res = 0;
+	debug_print((KERN_DEBUG "signal: %d\n", res));
+	return res;
+}
+
+/* set frequency and unmute card */
+static int fmr2_setfreq(struct fmr2_device *dev)
+{
+	int port = dev->port;
+	unsigned long freq = dev->curfreq;
+
+	fmr2_mute(port);
+
+	/* 0x42 for mono output
+	 * 0x102 forward scanning
+	 * 0x182 scansione avanti
+	 */
+	outbits(9,0x2,3,port);
+	outbits(16,RSF16_ENCODE(freq),2,port);
+
+	fmr2_unmute(port);
+
+	/* wait 0.11 sec */
+	msleep(110);
+
+	/* NOTE if mute this stop radio
+	   you must set freq on unmute */
+	dev->stereo = fmr2_stereo_mode(port);
+	return 0;
+}
+
+/* !!! not tested, in my card this does't work !!! */
+static int fmr2_setvolume(struct fmr2_device *dev)
+{
+	int vol[16] = { 0x021, 0x084, 0x090, 0x104,
+			0x110, 0x204, 0x210, 0x402,
+			0x404, 0x408, 0x410, 0x801,
+			0x802, 0x804, 0x808, 0x810 };
+	int i, a, port = dev->port;
+	int n = vol[dev->curvol & 0x0f];
+
+	if (dev->card_type != 11)
+		return 1;
+
+	for (i = 12; --i >= 0; ) {
+		a = ((n >> i) & 1) << 6; /* if (a=0) a= 0; else a= 0x40; */
+		outb(a | 4, port);
+		wait(4, port);
+		outb(a | 0x24, port);
+		wait(4, port);
+		outb(a | 4, port);
+		wait(4, port);
+	}
+	for (i = 6; --i >= 0; ) {
+		a = ((0x18 >> i) & 1) << 6;
+		outb(a | 4, port);
+		wait(4,port);
+		outb(a | 0x24, port);
+		wait(4,port);
+		outb(a|4, port);
+		wait(4,port);
+	}
+	wait(4, port);
+	outb(0x14, port);
+
+	return 0;
+}
+
+static int vidioc_querycap(struct file *file, void  *priv,
+					struct v4l2_capability *v)
+{
+	strlcpy(v->driver, "radio-sf16fmr2", sizeof(v->driver));
+	strlcpy(v->card, "SF16-FMR2 radio", sizeof(v->card));
+	sprintf(v->bus_info, "ISA");
+	v->version = RADIO_VERSION;
+	v->capabilities = V4L2_CAP_TUNER;
+	return 0;
+}
+
+static int vidioc_g_tuner(struct file *file, void *priv,
+					struct v4l2_tuner *v)
+{
+	int mult;
+	struct fmr2_device *fmr2 = video_drvdata(file);
+
+	if (v->index > 0)
+		return -EINVAL;
+
+	strcpy(v->name, "FM");
+	v->type = V4L2_TUNER_RADIO;
+
+	mult = (fmr2->flags & V4L2_TUNER_CAP_LOW) ? 1 : 1000;
+	v->rangelow = RSF16_MINFREQ/mult;
+	v->rangehigh = RSF16_MAXFREQ/mult;
+	v->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_MODE_STEREO;
+	v->capability = fmr2->flags&V4L2_TUNER_CAP_LOW;
+	v->audmode = fmr2->stereo ? V4L2_TUNER_MODE_STEREO:
+				V4L2_TUNER_MODE_MONO;
+	mutex_lock(&lock);
+	v->signal = fmr2_getsigstr(fmr2);
+	mutex_unlock(&lock);
+	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_s_frequency(struct file *file, void *priv,
+					struct v4l2_frequency *f)
+{
+	struct fmr2_device *fmr2 = video_drvdata(file);
+
+	if (!(fmr2->flags & V4L2_TUNER_CAP_LOW))
+		f->frequency *= 1000;
+	if (f->frequency < RSF16_MINFREQ ||
+			f->frequency > RSF16_MAXFREQ )
+		return -EINVAL;
+	/*rounding in steps of 200 to match th freq
+	that will be used */
+	fmr2->curfreq = (f->frequency/200)*200;
+
+	/* set card freq (if not muted) */
+	if (fmr2->curvol && !fmr2->mute) {
+		mutex_lock(&lock);
+		fmr2_setfreq(fmr2);
+		mutex_unlock(&lock);
+	}
+	return 0;
+}
+
+static int vidioc_g_frequency(struct file *file, void *priv,
+					struct v4l2_frequency *f)
+{
+	struct fmr2_device *fmr2 = video_drvdata(file);
+
+	f->type = V4L2_TUNER_RADIO;
+	f->frequency = fmr2->curfreq;
+	if (!(fmr2->flags & V4L2_TUNER_CAP_LOW))
+		f->frequency /= 1000;
+	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 fmr2_device *fmr2 = video_drvdata(file);
+
+	switch (ctrl->id) {
+	case V4L2_CID_AUDIO_MUTE:
+		ctrl->value = fmr2->mute;
+		return 0;
+	case V4L2_CID_AUDIO_VOLUME:
+		ctrl->value = fmr2->curvol;
+		return 0;
+	}
+	return -EINVAL;
+}
+
+static int vidioc_s_ctrl(struct file *file, void *priv,
+					struct v4l2_control *ctrl)
+{
+	struct fmr2_device *fmr2 = video_drvdata(file);
+
+	switch (ctrl->id) {
+	case V4L2_CID_AUDIO_MUTE:
+		fmr2->mute = ctrl->value;
+		break;
+	case V4L2_CID_AUDIO_VOLUME:
+		if (ctrl->value > radio_qctrl[AUD_VOL_INDEX].maximum)
+			fmr2->curvol = radio_qctrl[AUD_VOL_INDEX].maximum;
+		else
+			fmr2->curvol = ctrl->value;
+
+		break;
+	default:
+		return -EINVAL;
+	}
+
+#ifdef DEBUG
+	if (fmr2->curvol && !fmr2->mute)
+		printk(KERN_DEBUG "unmute\n");
+	else
+		printk(KERN_DEBUG "mute\n");
+#endif
+
+	mutex_lock(&lock);
+	if (fmr2->curvol && !fmr2->mute) {
+		fmr2_setvolume(fmr2);
+		/* Set frequency and unmute card */
+		fmr2_setfreq(fmr2);
+	} else
+		fmr2_mute(fmr2->port);
+	mutex_unlock(&lock);
+	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_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 vidioc_s_audio(struct file *file, void *priv,
+					struct v4l2_audio *a)
+{
+	if (a->index != 0)
+		return -EINVAL;
+	return 0;
+}
+
+static struct fmr2_device fmr2_unit;
+
+static int fmr2_exclusive_open(struct inode *inode, struct file *file)
+{
+	return test_and_set_bit(0, &fmr2_unit.in_use) ? -EBUSY : 0;
+}
+
+static int fmr2_exclusive_release(struct inode *inode, struct file *file)
+{
+	clear_bit(0, &fmr2_unit.in_use);
+	return 0;
+}
+
+static const struct file_operations fmr2_fops = {
+	.owner          = THIS_MODULE,
+	.open           = fmr2_exclusive_open,
+	.release        = fmr2_exclusive_release,
+	.ioctl          = video_ioctl2,
+#ifdef CONFIG_COMPAT
+	.compat_ioctl	= v4l_compat_ioctl32,
+#endif
+	.llseek         = no_llseek,
+};
+
+static const struct v4l2_ioctl_ops fmr2_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 fmr2_radio = {
+	.name		= "SF16FMR2 radio",
+	.fops		= &fmr2_fops,
+	.ioctl_ops 	= &fmr2_ioctl_ops,
+	.release	= video_device_release_empty,
+};
+
+static int __init fmr2_init(void)
+{
+	fmr2_unit.port = io;
+	fmr2_unit.curvol = 0;
+	fmr2_unit.mute = 0;
+	fmr2_unit.curfreq = 0;
+	fmr2_unit.stereo = 1;
+	fmr2_unit.flags = V4L2_TUNER_CAP_LOW;
+	fmr2_unit.card_type = 0;
+	video_set_drvdata(&fmr2_radio, &fmr2_unit);
+
+	mutex_init(&lock);
+
+	if (!request_region(io, 2, "sf16fmr2")) {
+		printk(KERN_ERR "radio-sf16fmr2: request_region failed!\n");
+		return -EBUSY;
+	}
+
+	if (video_register_device(&fmr2_radio, VFL_TYPE_RADIO, radio_nr) < 0) {
+		release_region(io, 2);
+		return -EINVAL;
+	}
+
+	printk(KERN_INFO "SF16FMR2 radio card driver at 0x%x.\n", io);
+	/* mute card - prevents noisy bootups */
+	mutex_lock(&lock);
+	fmr2_mute(io);
+	fmr2_product_info(&fmr2_unit);
+	mutex_unlock(&lock);
+	debug_print((KERN_DEBUG "card_type %d\n", fmr2_unit.card_type));
+
+	/* Only card_type == 11 implements volume */
+	if (fmr2_unit.card_type != 11)
+		radio_qctrl[AUD_VOL_INDEX].maximum = 1;
+
+	return 0;
+}
+
+MODULE_AUTHOR("Ziglio Frediano, freddy77@angelfire.com");
+MODULE_DESCRIPTION("A driver for the SF16FMR2 radio.");
+MODULE_LICENSE("GPL");
+
+module_param(io, int, 0);
+MODULE_PARM_DESC(io, "I/O address of the SF16FMR2 card (should be 0x384, if do not work try 0x284)");
+module_param(radio_nr, int, 0);
+
+static void __exit fmr2_cleanup_module(void)
+{
+	video_unregister_device(&fmr2_radio);
+	release_region(io,2);
+}
+
+module_init(fmr2_init);
+module_exit(fmr2_cleanup_module);
+
+#ifndef MODULE
+
+static int __init fmr2_setup_io(char *str)
+{
+	get_option(&str, &io);
+	return 1;
+}
+
+__setup("sf16fmr2=", fmr2_setup_io);
+
+#endif