V4L/DVB (10885): radio-maestro: convert to v4l2_device.

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

1 files changed, 164 insertions, 174 deletions

diff --git a/drivers/media/radio/radio-maestro.c b/drivers/media/radio/radio-maestro.c
index ba3a13a90013..adab964b2a39 100644
--- a/drivers/media/radio/radio-maestro.c
+++ b/drivers/media/radio/radio-maestro.c
@@ -22,27 +22,23 @@
 #include <linux/init.h>
 #include <linux/ioport.h>
 #include <linux/delay.h>
-#include <asm/io.h>
-#include <asm/uaccess.h>
+#include <linux/version.h>      /* for KERNEL_VERSION MACRO     */
 #include <linux/pci.h>
 #include <linux/videodev2.h>
-#include <media/v4l2-common.h>
+#include <linux/io.h>
+#include <linux/uaccess.h>
+#include <media/v4l2-device.h>
 #include <media/v4l2-ioctl.h>
 
-#include <linux/version.h>      /* for KERNEL_VERSION MACRO     */
-#define RADIO_VERSION KERNEL_VERSION(0,0,6)
-#define DRIVER_VERSION  "0.06"
+MODULE_AUTHOR("Adam Tlalka, atlka@pg.gda.pl");
+MODULE_DESCRIPTION("Radio driver for the Maestro PCI sound card radio.");
+MODULE_LICENSE("GPL");
 
-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,
-        }
-};
+static int radio_nr = -1;
+module_param(radio_nr, int, 0);
+
+#define RADIO_VERSION KERNEL_VERSION(0, 0, 6)
+#define DRIVER_VERSION  "0.06"
 
 #define GPIO_DATA       0x60   /* port offset from ESS_IO_BASE */
 
@@ -72,62 +68,27 @@ static struct v4l2_queryctrl radio_qctrl[] = {
 
 #define BITS2FREQ(x)    ((x) * FREQ_STEP - FREQ_IF)
 
-static int radio_nr = -1;
-module_param(radio_nr, int, 0);
+struct maestro {
+        struct v4l2_device v4l2_dev;
+        struct video_device vdev;
+        struct pci_dev *pdev;
+        struct mutex lock;
 
-static unsigned long in_use;
-
-static int maestro_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
+        u16     io;     /* base of Maestro card radio io (GPIO_DATA)*/
+        u16     muted;  /* VIDEO_AUDIO_MUTE */
+        u16     stereo; /* VIDEO_TUNER_STEREO_ON */
+        u16     tuned;  /* signal strength (0 or 0xffff) */
+};
 
-static int maestro_exclusive_open(struct file *file)
+static inline struct maestro *to_maestro(struct v4l2_device *v4l2_dev)
 {
-        return test_and_set_bit(0, &in_use) ? -EBUSY : 0;
+        return container_of(v4l2_dev, struct maestro, v4l2_dev);
 }
 
-static int maestro_exclusive_release(struct file *file)
+static u32 radio_bits_get(struct maestro *dev)
 {
-        clear_bit(0, &in_use);
-        return 0;
-}
-
-static void maestro_remove(struct pci_dev *pdev);
-
-static struct pci_device_id maestro_r_pci_tbl[] = {
-        { PCI_DEVICE(PCI_VENDOR_ID_ESS, PCI_DEVICE_ID_ESS_ESS1968),
-                .class = PCI_CLASS_MULTIMEDIA_AUDIO << 8,
-                .class_mask = 0xffff00 },
-        { PCI_DEVICE(PCI_VENDOR_ID_ESS, PCI_DEVICE_ID_ESS_ESS1978),
-                .class = PCI_CLASS_MULTIMEDIA_AUDIO << 8,
-                .class_mask = 0xffff00 },
-        { 0 }
-};
-MODULE_DEVICE_TABLE(pci, maestro_r_pci_tbl);
-
-static struct pci_driver maestro_r_driver = {
-        .name           = "maestro_radio",
-        .id_table       = maestro_r_pci_tbl,
-        .probe          = maestro_probe,
-        .remove         = __devexit_p(maestro_remove),
-};
-
-static const struct v4l2_file_operations maestro_fops = {
-        .owner          = THIS_MODULE,
-        .open           = maestro_exclusive_open,
-        .release        = maestro_exclusive_release,
-        .ioctl          = video_ioctl2,
-};
-
-struct radio_device {
-        u16     io,     /* base of Maestro card radio io (GPIO_DATA)*/
-                muted,  /* VIDEO_AUDIO_MUTE */
-                stereo, /* VIDEO_TUNER_STEREO_ON */
-                tuned;  /* signal strength (0 or 0xffff) */
-};
-
-static u32 radio_bits_get(struct radio_device *dev)
-{
-        register u16 io=dev->io, l, rdata;
-        register u32 data=0;
+        u16 io = dev->io, l, rdata;
+        u32 data = 0;
         u16 omask;
 
         omask = inw(io + IO_MASK);
@@ -135,25 +96,23 @@ static u32 radio_bits_get(struct radio_device *dev)
         outw(0, io);
         udelay(16);
 
-        for (l=24;l--;) {
+        for (l = 24; l--;) {
                 outw(STR_CLK, io);              /* HI state */
                 udelay(2);
-                if(!l)
+                if (!l)
                         dev->tuned = inw(io) & STR_MOST ? 0 : 0xffff;
                 outw(0, io);                    /* LO state */
                 udelay(2);
                 data <<= 1;                     /* shift data */
                 rdata = inw(io);
-                if(!l)
-                        dev->stereo =  rdata & STR_MOST ?
-                        0 : 1;
-                else
-                        if(rdata & STR_DATA)
-                                data++;
+                if (!l)
+                        dev->stereo = (rdata & STR_MOST) ?  0 : 1;
+                else if (rdata & STR_DATA)
+                        data++;
                 udelay(2);
         }
 
-        if(dev->muted)
+        if (dev->muted)
                 outw(STR_WREN, io);
 
         udelay(4);
@@ -162,18 +121,18 @@ static u32 radio_bits_get(struct radio_device *dev)
         return data & 0x3ffe;
 }
 
-static void radio_bits_set(struct radio_device *dev, u32 data)
+static void radio_bits_set(struct maestro *dev, u32 data)
 {
-        register u16 io=dev->io, l, bits;
+        u16 io = dev->io, l, bits;
         u16 omask, odir;
 
         omask = inw(io + IO_MASK);
-        odir  = (inw(io + IO_DIR) & ~STR_DATA) | (STR_CLK | STR_WREN);
+        odir = (inw(io + IO_DIR) & ~STR_DATA) | (STR_CLK | STR_WREN);
         outw(odir | STR_DATA, io + IO_DIR);
         outw(~(STR_DATA | STR_CLK | STR_WREN), io + IO_MASK);
         udelay(16);
-        for (l=25;l;l--) {
-                bits = ((data >> 18) & STR_DATA) | STR_WREN ;
+        for (l = 25; l; l--) {
+                bits = ((data >> 18) & STR_DATA) | STR_WREN;
                 data <<= 1;                     /* shift data */
                 outw(bits, io);                 /* start strobe */
                 udelay(2);
@@ -183,7 +142,7 @@ static void radio_bits_set(struct radio_device *dev, u32 data)
                 udelay(4);
         }
 
-        if(!dev->muted)
+        if (!dev->muted)
                 outw(0, io);
 
         udelay(4);
@@ -195,78 +154,79 @@ static void radio_bits_set(struct radio_device *dev, u32 data)
 static int vidioc_querycap(struct file *file, void  *priv,
                                         struct v4l2_capability *v)
 {
+        struct maestro *dev = video_drvdata(file);
+
         strlcpy(v->driver, "radio-maestro", sizeof(v->driver));
         strlcpy(v->card, "Maestro Radio", sizeof(v->card));
-        sprintf(v->bus_info, "PCI");
+        snprintf(v->bus_info, sizeof(v->bus_info), "PCI:%s", pci_name(dev->pdev));
         v->version = RADIO_VERSION;
-        v->capabilities = V4L2_CAP_TUNER;
+        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 radio_device *card = video_drvdata(file);
+        struct maestro *dev = video_drvdata(file);
 
         if (v->index > 0)
                 return -EINVAL;
 
-        (void)radio_bits_get(card);
+        mutex_lock(&dev->lock);
+        radio_bits_get(dev);
 
-        strcpy(v->name, "FM");
+        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->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
         v->capability = V4L2_TUNER_CAP_LOW;
-        if(card->stereo)
+        if (dev->stereo)
                 v->audmode = V4L2_TUNER_MODE_STEREO;
         else
                 v->audmode = V4L2_TUNER_MODE_MONO;
-        v->signal = card->tuned;
+        v->signal = dev->tuned;
+        mutex_unlock(&dev->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 radio_device *card = video_drvdata(file);
+        struct maestro *dev = video_drvdata(file);
 
         if (f->frequency < FREQ_LO || f->frequency > FREQ_HI)
                 return -EINVAL;
-        radio_bits_set(card, FREQ2BITS(f->frequency));
+        mutex_lock(&dev->lock);
+        radio_bits_set(dev, FREQ2BITS(f->frequency));
+        mutex_unlock(&dev->lock);
         return 0;
 }
 
 static int vidioc_g_frequency(struct file *file, void *priv,
                                         struct v4l2_frequency *f)
 {
-        struct radio_device *card = video_drvdata(file);
+        struct maestro *dev = video_drvdata(file);
 
         f->type = V4L2_TUNER_RADIO;
-        f->frequency = BITS2FREQ(radio_bits_get(card));
+        mutex_lock(&dev->lock);
+        f->frequency = BITS2FREQ(radio_bits_get(dev));
+        mutex_unlock(&dev->lock);
         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;
-                }
+        switch (qc->id) {
+        case V4L2_CID_AUDIO_MUTE:
+                return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
         }
         return -EINVAL;
 }
@@ -274,11 +234,11 @@ static int vidioc_queryctrl(struct file *file, void *priv,
 static int vidioc_g_ctrl(struct file *file, void *priv,
                                         struct v4l2_control *ctrl)
 {
-        struct radio_device *card = video_drvdata(file);
+        struct maestro *dev = video_drvdata(file);
 
         switch (ctrl->id) {
         case V4L2_CID_AUDIO_MUTE:
-                ctrl->value = card->muted;
+                ctrl->value = dev->muted;
                 return 0;
         }
         return -EINVAL;
@@ -287,56 +247,85 @@ 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 radio_device *card = video_drvdata(file);
-        register u16 io = card->io;
-        register u16 omask = inw(io + IO_MASK);
+        struct maestro *dev = video_drvdata(file);
+        u16 io = dev->io;
+        u16 omask;
 
         switch (ctrl->id) {
         case V4L2_CID_AUDIO_MUTE:
+                mutex_lock(&dev->lock);
+                omask = inw(io + IO_MASK);
                 outw(~STR_WREN, io + IO_MASK);
-                outw((card->muted = ctrl->value ) ?
-                                STR_WREN : 0, io);
+                dev->muted = ctrl->value;
+                outw(dev->muted ? STR_WREN : 0, io);
                 udelay(4);
                 outw(omask, io + IO_MASK);
                 msleep(125);
+                mutex_unlock(&dev->lock);
                 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)
+{
+        return i ? -EINVAL : 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->index = 0;
+        strlcpy(a->name, "Radio", sizeof(a->name));
         a->capability = V4L2_AUDCAP_STEREO;
         return 0;
 }
 
-static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
+static int vidioc_s_audio(struct file *file, void *priv,
+                                        struct v4l2_audio *a)
 {
-        *i = 0;
-        return 0;
+        return a->index ? -EINVAL : 0;
 }
 
-static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
+static int maestro_open(struct file *file)
 {
-        if (i != 0)
-                return -EINVAL;
         return 0;
 }
 
-static int vidioc_s_audio(struct file *file, void *priv,
-                                        struct v4l2_audio *a)
+static int maestro_release(struct file *file)
 {
-        if (a->index != 0)
-                return -EINVAL;
         return 0;
 }
 
-static u16 __devinit radio_power_on(struct radio_device *dev)
+static const struct v4l2_file_operations maestro_fops = {
+        .owner          = THIS_MODULE,
+        .open           = maestro_open,
+        .release        = maestro_release,
+        .ioctl          = video_ioctl2,
+};
+
+static const struct v4l2_ioctl_ops maestro_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 u16 __devinit radio_power_on(struct maestro *dev)
 {
         register u16 io = dev->io;
         register u32 ofreq;
@@ -360,33 +349,11 @@ static u16 __devinit radio_power_on(struct radio_device *dev)
         return (ofreq == radio_bits_get(dev));
 }
 
-static const struct v4l2_ioctl_ops maestro_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 maestro_radio = {
-        .name           = "Maestro radio",
-        .fops           = &maestro_fops,
-        .ioctl_ops      = &maestro_ioctl_ops,
-        .release        = video_device_release,
-};
-
 static int __devinit maestro_probe(struct pci_dev *pdev,
         const struct pci_device_id *ent)
 {
-        struct radio_device *radio_unit;
-        struct video_device *maestro_radio_inst;
+        struct maestro *dev;
+        struct v4l2_device *v4l2_dev;
         int retval;
 
         retval = pci_enable_device(pdev);
@@ -397,46 +364,53 @@ static int __devinit maestro_probe(struct pci_dev *pdev,
 
         retval = -ENOMEM;
 
-        radio_unit = kzalloc(sizeof(*radio_unit), GFP_KERNEL);
-        if (radio_unit == NULL) {
+        dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+        if (dev == NULL) {
                 dev_err(&pdev->dev, "not enough memory\n");
                 goto err;
         }
 
-        radio_unit->io = pci_resource_start(pdev, 0) + GPIO_DATA;
+        v4l2_dev = &dev->v4l2_dev;
+        mutex_init(&dev->lock);
+        dev->pdev = pdev;
 
-        maestro_radio_inst = video_device_alloc();
-        if (maestro_radio_inst == NULL) {
-                dev_err(&pdev->dev, "not enough memory\n");
+        strlcpy(v4l2_dev->name, "maestro", 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;
         }
 
-        memcpy(maestro_radio_inst, &maestro_radio, sizeof(maestro_radio));
-        video_set_drvdata(maestro_radio_inst, radio_unit);
-        pci_set_drvdata(pdev, maestro_radio_inst);
+        dev->io = pci_resource_start(pdev, 0) + GPIO_DATA;
 
-        retval = video_register_device(maestro_radio_inst, VFL_TYPE_RADIO, radio_nr);
+        strlcpy(dev->vdev.name, v4l2_dev->name, sizeof(dev->vdev.name));
+        dev->vdev.v4l2_dev = v4l2_dev;
+        dev->vdev.fops = &maestro_fops;
+        dev->vdev.ioctl_ops = &maestro_ioctl_ops;
+        dev->vdev.release = video_device_release_empty;
+        video_set_drvdata(&dev->vdev, dev);
+
+        retval = video_register_device(&dev->vdev, VFL_TYPE_RADIO, radio_nr);
         if (retval) {
-                printk(KERN_ERR "can't register video device!\n");
+                v4l2_err(v4l2_dev, "can't register video device!\n");
                 goto errfr1;
         }
 
-        if (!radio_power_on(radio_unit)) {
+        if (!radio_power_on(dev)) {
                 retval = -EIO;
                 goto errunr;
         }
 
-        dev_info(&pdev->dev, "version " DRIVER_VERSION " time " __TIME__ "  "
-                 __DATE__ "\n");
-        dev_info(&pdev->dev, "radio chip initialized\n");
+        v4l2_info(v4l2_dev, "version " DRIVER_VERSION "\n");
 
         return 0;
 errunr:
-        video_unregister_device(maestro_radio_inst);
+        video_unregister_device(&dev->vdev);
 errfr1:
-        video_device_release(maestro_radio_inst);
+        v4l2_device_unregister(v4l2_dev);
 errfr:
-        kfree(radio_unit);
+        kfree(dev);
 err:
         return retval;
 
@@ -444,11 +418,31 @@ err:
 
 static void __devexit maestro_remove(struct pci_dev *pdev)
 {
-        struct video_device *vdev = pci_get_drvdata(pdev);
+        struct v4l2_device *v4l2_dev = dev_get_drvdata(&pdev->dev);
+        struct maestro *dev = to_maestro(v4l2_dev);
 
-        video_unregister_device(vdev);
+        video_unregister_device(&dev->vdev);
+        v4l2_device_unregister(&dev->v4l2_dev);
 }
 
+static struct pci_device_id maestro_r_pci_tbl[] = {
+        { PCI_DEVICE(PCI_VENDOR_ID_ESS, PCI_DEVICE_ID_ESS_ESS1968),
+                .class = PCI_CLASS_MULTIMEDIA_AUDIO << 8,
+                .class_mask = 0xffff00 },
+        { PCI_DEVICE(PCI_VENDOR_ID_ESS, PCI_DEVICE_ID_ESS_ESS1978),
+                .class = PCI_CLASS_MULTIMEDIA_AUDIO << 8,
+                .class_mask = 0xffff00 },
+        { 0 }
+};
+MODULE_DEVICE_TABLE(pci, maestro_r_pci_tbl);
+
+static struct pci_driver maestro_r_driver = {
+        .name           = "maestro_radio",
+        .id_table       = maestro_r_pci_tbl,
+        .probe          = maestro_probe,
+        .remove         = __devexit_p(maestro_remove),
+};
+
 static int __init maestro_radio_init(void)
 {
         int retval = pci_register_driver(&maestro_r_driver);
@@ -466,7 +460,3 @@ static void __exit maestro_radio_exit(void)
 
 module_init(maestro_radio_init);
 module_exit(maestro_radio_exit);
-
-MODULE_AUTHOR("Adam Tlalka, atlka@pg.gda.pl");
-MODULE_DESCRIPTION("Radio driver for the Maestro PCI sound card radio.");
-MODULE_LICENSE("GPL");