V4L/DVB (10889): radio-sf16fmr2: convert to v4l2_device.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/radio/radio-sf16fmr2.c

@@ -18,40 +18,29 @@
 #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>
+#include <linux/version.h>      /* for KERNEL_VERSION MACRO     */
+#include <linux/io.h>		/* outb, outb_p			*/
+#include <linux/uaccess.h>	/* copy to/from user		*/
+#include <media/v4l2-device.h>
+#include <media/v4l2-ioctl.h>
 
-static struct mutex lock;
+MODULE_AUTHOR("Ziglio Frediano, freddy77@angelfire.com");
+MODULE_DESCRIPTION("A driver for the SF16FMR2 radio.");
+MODULE_LICENSE("GPL");
+
+static int io = 0x384;
+static int radio_nr = -1;
+
+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);
 
-#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
 
@@ -62,156 +51,160 @@ static struct v4l2_queryctrl radio_qctrl[] = {
 #endif
 
 /* this should be static vars for module size */
-struct fmr2_device
+struct fmr2
 {
-	unsigned long in_use;
-	int port;
+	struct v4l2_device v4l2_dev;
+	struct video_device vdev;
+	struct mutex lock;
+	int io;
 	int curvol; /* 0-15 */
 	int mute;
 	int stereo; /* card is producing stereo audio */
 	unsigned long curfreq; /* freq in kHz */
 	int card_type;
-	__u32 flags;
+	u32 flags;
 };
 
-static int io = 0x384;
-static int radio_nr = -1;
+static struct fmr2 fmr2_card;
 
 /* 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
+#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)
+static inline void wait(int n, int io)
 {
-	for (;n;--n) inb(port);
+	for (; n; --n)
+		inb(io);
 }
 
-static void outbits(int bits, unsigned int data, int nWait, int port)
+static void outbits(int bits, unsigned int data, int nWait, int io)
 {
 	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);
+
+	for (; --bits >= 0;) {
+		bit = (data >> bits) & 1;
+		outb(bit, io);
+		wait(nWait, io);
+		outb(bit | 2, io);
+		wait(nWait, io);
+		outb(bit, io);
+		wait(nWait, io);
 	}
 }
 
-static inline void fmr2_mute(int port)
+static inline void fmr2_mute(int io)
 {
-	outb(0x00, port);
-	wait(4,port);
+	outb(0x00, io);
+	wait(4, io);
 }
 
-static inline void fmr2_unmute(int port)
+static inline void fmr2_unmute(int io)
 {
-	outb(0x04, port);
-	wait(4,port);
+	outb(0x04, io);
+	wait(4, io);
 }
 
-static inline int fmr2_stereo_mode(int port)
+static inline int fmr2_stereo_mode(int io)
 {
-	int n = inb(port);
-	outb(6,port);
-	inb(port);
-	n = ((n>>3)&1)^1;
+	int n = inb(io);
+
+	outb(6, io);
+	inb(io);
+	n = ((n >> 3) & 1) ^ 1;
 	debug_print((KERN_DEBUG "stereo: %d\n", n));
 	return n;
 }
 
-static int fmr2_product_info(struct fmr2_device *dev)
+static int fmr2_product_info(struct fmr2 *dev)
 {
-	int n = inb(dev->port);
+	int n = inb(dev->io);
+
 	n &= 0xC1;
-	if (n == 0)
-	{
+	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;
+	dev->card_type = (n == 128) ? 11 : 0;
 	return n;
 }
 
-static inline int fmr2_getsigstr(struct fmr2_device *dev)
+static inline int fmr2_getsigstr(struct fmr2 *dev)
 {
-	/* !!! work only if scanning freq */
-	int port = dev->port, res = 0xffff;
-	outb(5,port);
-	wait(4,port);
-	if (!(inb(port)&1)) res = 0;
+	/* !!! works only if scanning freq */
+	int res = 0xffff;
+
+	outb(5, dev->io);
+	wait(4, dev->io);
+	if (!(inb(dev->io) & 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)
+static int fmr2_setfreq(struct fmr2 *dev)
 {
-	int port = dev->port;
 	unsigned long freq = dev->curfreq;
 
-	fmr2_mute(port);
+	fmr2_mute(dev->io);
 
 	/* 0x42 for mono output
 	 * 0x102 forward scanning
 	 * 0x182 scansione avanti
 	 */
-	outbits(9,0x2,3,port);
-	outbits(16,RSF16_ENCODE(freq),2,port);
+	outbits(9, 0x2, 3, dev->io);
+	outbits(16, RSF16_ENCODE(freq), 2, dev->io);
 
-	fmr2_unmute(port);
+	fmr2_unmute(dev->io);
 
 	/* wait 0.11 sec */
 	msleep(110);
 
 	/* NOTE if mute this stop radio
 	   you must set freq on unmute */
-	dev->stereo = fmr2_stereo_mode(port);
+	dev->stereo = fmr2_stereo_mode(dev->io);
 	return 0;
 }
 
 /* !!! not tested, in my card this does't work !!! */
-static int fmr2_setvolume(struct fmr2_device *dev)
+static int fmr2_setvolume(struct fmr2 *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 i, a;
 	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);
+		a = ((n >> i) & 1) << 6; /* if (a==0) a = 0; else a = 0x40; */
+		outb(a | 4, dev->io);
+		wait(4, dev->io);
+		outb(a | 0x24, dev->io);
+		wait(4, dev->io);
+		outb(a | 4, dev->io);
+		wait(4, dev->io);
 	}
 	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);
+		outb(a | 4, dev->io);
+		wait(4, dev->io);
+		outb(a | 0x24, dev->io);
+		wait(4, dev->io);
+		outb(a | 4, dev->io);
+		wait(4, dev->io);
 	}
-	wait(4, port);
-	outb(0x14, port);
-
+	wait(4, dev->io);
+	outb(0x14, dev->io);
 	return 0;
 }
 
@@ -220,9 +213,9 @@ static int vidioc_querycap(struct file *file, void  *priv,
 {
 	strlcpy(v->driver, "radio-sf16fmr2", sizeof(v->driver));
 	strlcpy(v->card, "SF16-FMR2 radio", sizeof(v->card));
-	sprintf(v->bus_info, "ISA");
+	strlcpy(v->bus_info, "ISA", sizeof(v->bus_info));
 	v->version = RADIO_VERSION;
-	v->capabilities = V4L2_CAP_TUNER;
+	v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
 	return 0;
 }
 
@@ -230,54 +223,52 @@ static int vidioc_g_tuner(struct file *file, void *priv,
 					struct v4l2_tuner *v)
 {
 	int mult;
-	struct fmr2_device *fmr2 = video_drvdata(file);
+	struct fmr2 *fmr2 = video_drvdata(file);
 
 	if (v->index > 0)
 		return -EINVAL;
 
-	strcpy(v->name, "FM");
+	strlcpy(v->name, "FM", sizeof(v->name));
 	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->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);
+	mutex_lock(&fmr2->lock);
 	v->signal = fmr2_getsigstr(fmr2);
-	mutex_unlock(&lock);
+	mutex_unlock(&fmr2->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;
+	return v->index ? -EINVAL : 0;
 }
 
 static int vidioc_s_frequency(struct file *file, void *priv,
 					struct v4l2_frequency *f)
 {
-	struct fmr2_device *fmr2 = video_drvdata(file);
+	struct fmr2 *fmr2 = video_drvdata(file);
 
 	if (!(fmr2->flags & V4L2_TUNER_CAP_LOW))
 		f->frequency *= 1000;
 	if (f->frequency < RSF16_MINFREQ ||
-			f->frequency > RSF16_MAXFREQ )
+			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;
+	/* rounding in steps of 200 to match the 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);
+		mutex_lock(&fmr2->lock);
 		fmr2_setfreq(fmr2);
-		mutex_unlock(&lock);
+		mutex_unlock(&fmr2->lock);
 	}
 	return 0;
 }
@@ -285,7 +276,7 @@ static int vidioc_s_frequency(struct file *file, void *priv,
 static int vidioc_g_frequency(struct file *file, void *priv,
 					struct v4l2_frequency *f)
 {
-	struct fmr2_device *fmr2 = video_drvdata(file);
+	struct fmr2 *fmr2 = video_drvdata(file);
 
 	f->type = V4L2_TUNER_RADIO;
 	f->frequency = fmr2->curfreq;
@@ -297,13 +288,16 @@ static int vidioc_g_frequency(struct file *file, void *priv,
 static int vidioc_queryctrl(struct file *file, void *priv,
 					struct v4l2_queryctrl *qc)
 {
-	int i;
+	struct fmr2 *fmr2 = video_drvdata(file);
 
-	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;
-		}
+	switch (qc->id) {
+	case V4L2_CID_AUDIO_MUTE:
+		return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
+	case V4L2_CID_AUDIO_VOLUME:
+		/* Only card_type == 11 implements volume */
+		if (fmr2->card_type == 11)
+			return v4l2_ctrl_query_fill(qc, 0, 15, 1, 0);
+		return v4l2_ctrl_query_fill(qc, 0, 1, 1, 0);
 	}
 	return -EINVAL;
 }
@@ -311,7 +305,7 @@ static int vidioc_queryctrl(struct file *file, void *priv,
 static int vidioc_g_ctrl(struct file *file, void *priv,
 					struct v4l2_control *ctrl)
 {
-	struct fmr2_device *fmr2 = video_drvdata(file);
+	struct fmr2 *fmr2 = video_drvdata(file);
 
 	switch (ctrl->id) {
 	case V4L2_CID_AUDIO_MUTE:
@@ -327,18 +321,14 @@ static int vidioc_g_ctrl(struct file *file, void *priv,
 static int vidioc_s_ctrl(struct file *file, void *priv,
 					struct v4l2_control *ctrl)
 {
-	struct fmr2_device *fmr2 = video_drvdata(file);
+	struct fmr2 *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;
-
+		fmr2->curvol = ctrl->value;
 		break;
 	default:
 		return -EINVAL;
@@ -351,25 +341,14 @@ static int vidioc_s_ctrl(struct file *file, void *priv,
 		printk(KERN_DEBUG "mute\n");
 #endif
 
-	mutex_lock(&lock);
+	mutex_lock(&fmr2->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;
+		fmr2_mute(fmr2->io);
+	mutex_unlock(&fmr2->lock);
 	return 0;
 }
 
@@ -381,36 +360,38 @@ static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
 
 static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
 {
-	if (i != 0)
-		return -EINVAL;
-	return 0;
+	return i ? -EINVAL : 0;
 }
 
-static int vidioc_s_audio(struct file *file, void *priv,
+static int vidioc_g_audio(struct file *file, void *priv,
 					struct v4l2_audio *a)
 {
-	if (a->index != 0)
-		return -EINVAL;
+	a->index = 0;
+	strlcpy(a->name, "Radio", sizeof(a->name));
+	a->capability = V4L2_AUDCAP_STEREO;
 	return 0;
 }
 
-static struct fmr2_device fmr2_unit;
+static int vidioc_s_audio(struct file *file, void *priv,
+					struct v4l2_audio *a)
+{
+	return a->index ? -EINVAL : 0;
+}
 
-static int fmr2_exclusive_open(struct file *file)
+static int fmr2_open(struct file *file)
 {
-	return test_and_set_bit(0, &fmr2_unit.in_use) ? -EBUSY : 0;
+	return 0;
 }
 
-static int fmr2_exclusive_release(struct file *file)
+static int fmr2_release(struct file *file)
 {
-	clear_bit(0, &fmr2_unit.in_use);
 	return 0;
 }
 
 static const struct v4l2_file_operations fmr2_fops = {
 	.owner          = THIS_MODULE,
-	.open           = fmr2_exclusive_open,
-	.release        = fmr2_exclusive_release,
+	.open           = fmr2_open,
+	.release        = fmr2_release,
 	.ioctl          = video_ioctl2,
 };
 
@@ -429,67 +410,64 @@ static const struct v4l2_ioctl_ops fmr2_ioctl_ops = {
 	.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");
+	struct fmr2 *fmr2 = &fmr2_card;
+	struct v4l2_device *v4l2_dev = &fmr2->v4l2_dev;
+	int res;
+
+	strlcpy(v4l2_dev->name, "sf16fmr2", sizeof(v4l2_dev->name));
+	fmr2->io = io;
+	fmr2->stereo = 1;
+	fmr2->flags = V4L2_TUNER_CAP_LOW;
+	mutex_init(&fmr2->lock);
+
+	if (!request_region(fmr2->io, 2, "sf16fmr2")) {
+		v4l2_err(v4l2_dev, "request_region failed!\n");
 		return -EBUSY;
 	}
 
-	if (video_register_device(&fmr2_radio, VFL_TYPE_RADIO, radio_nr) < 0) {
-		release_region(io, 2);
-		return -EINVAL;
+	res = v4l2_device_register(NULL, v4l2_dev);
+	if (res < 0) {
+		release_region(fmr2->io, 2);
+		v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
+		return res;
 	}
 
-	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));
+	strlcpy(fmr2->vdev.name, v4l2_dev->name, sizeof(fmr2->vdev.name));
+	fmr2->vdev.v4l2_dev = v4l2_dev;
+	fmr2->vdev.fops = &fmr2_fops;
+	fmr2->vdev.ioctl_ops = &fmr2_ioctl_ops;
+	fmr2->vdev.release = video_device_release_empty;
+	video_set_drvdata(&fmr2->vdev, fmr2);
 
-	/* Only card_type == 11 implements volume */
-	if (fmr2_unit.card_type != 11)
-		radio_qctrl[AUD_VOL_INDEX].maximum = 1;
+	if (video_register_device(&fmr2->vdev, VFL_TYPE_RADIO, radio_nr) < 0) {
+		v4l2_device_unregister(v4l2_dev);
+		release_region(fmr2->io, 2);
+		return -EINVAL;
+	}
 
+	v4l2_info(v4l2_dev, "SF16FMR2 radio card driver at 0x%x.\n", fmr2->io);
+	/* mute card - prevents noisy bootups */
+	mutex_lock(&fmr2->lock);
+	fmr2_mute(fmr2->io);
+	fmr2_product_info(fmr2);
+	mutex_unlock(&fmr2->lock);
+	debug_print((KERN_DEBUG "card_type %d\n", fmr2->card_type));
 	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)
+static void __exit fmr2_exit(void)
 {
-	video_unregister_device(&fmr2_radio);
-	release_region(io,2);
+	struct fmr2 *fmr2 = &fmr2_card;
+
+	video_unregister_device(&fmr2->vdev);
+	v4l2_device_unregister(&fmr2->v4l2_dev);
+	release_region(fmr2->io, 2);
 }
 
 module_init(fmr2_init);
-module_exit(fmr2_cleanup_module);
+module_exit(fmr2_exit);
 
 #ifndef MODULE