[media] radio-aztech: Convert to radio-isa

Tested with actual hardware and the Keene USB FM Transmitter.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 79 insertions, 292 deletions

diff --git a/drivers/media/radio/radio-aztech.c b/drivers/media/radio/radio-aztech.c
index eed7b0840734..8117fdf9ed4d 100644
--- a/drivers/media/radio/radio-aztech.c
+++ b/drivers/media/radio/radio-aztech.c
@@ -1,5 +1,7 @@
-/* radio-aztech.c - Aztech radio card driver for Linux 2.2
+/*
+ * radio-aztech.c - Aztech radio card driver
  *
+ * Converted to the radio-isa framework by Hans Verkuil <hans.verkuil@xs4all.nl>
  * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
  * Adapted to support the Video for Linux API by
  * Russell Kroll <rkroll@exploits.org>.  Based on original tuner code by:
@@ -10,19 +12,7 @@
  * Scott McGrath    (smcgrath@twilight.vtc.vsc.edu)
  * William McGrath  (wmcgrath@twilight.vtc.vsc.edu)
  *
- * The basis for this code may be found at http://bigbang.vtc.vsc.edu/fmradio/
- * along with more information on the card itself.
- *
- * History:
- * 1999-02-24   Russell Kroll <rkroll@exploits.org>
- *              Fine tuning/VIDEO_TUNER_LOW
- *              Range expanded to 87-108 MHz (from 87.9-107.8)
- *
- * Notable changes from the original source:
- * - includes stripped down to the essentials
- * - for loops used as delays replaced with udelay()
- * - #defines removed, changed to static values
- * - tuning structure changed - no more character arrays, other changes
+ * Fully tested with the Keene USB FM Transmitter and the v4l2-compliance tool.
 */
 
 #include <linux/module.h>       /* Modules                      */
@@ -33,124 +23,69 @@
 #include <linux/io.h>           /* outb, outb_p                 */
 #include <media/v4l2-device.h>
 #include <media/v4l2-ioctl.h>
+#include <media/v4l2-ctrls.h>
+#include "radio-isa.h"
 
 MODULE_AUTHOR("Russell Kroll, Quay Lu, Donald Song, Jason Lewis, Scott McGrath, William McGrath");
 MODULE_DESCRIPTION("A driver for the Aztech radio card.");
 MODULE_LICENSE("GPL");
-MODULE_VERSION("0.0.3");
+MODULE_VERSION("1.0.0");
 
 /* acceptable ports: 0x350 (JP3 shorted), 0x358 (JP3 open) */
-
 #ifndef CONFIG_RADIO_AZTECH_PORT
 #define CONFIG_RADIO_AZTECH_PORT -1
 #endif
 
-static int io = CONFIG_RADIO_AZTECH_PORT;
-static int radio_nr = -1;
-static int radio_wait_time = 1000;
+#define AZTECH_MAX 2
 
-module_param(io, int, 0);
-module_param(radio_nr, int, 0);
-MODULE_PARM_DESC(io, "I/O address of the Aztech card (0x350 or 0x358)");
+static int io[AZTECH_MAX] = { [0] = CONFIG_RADIO_AZTECH_PORT,
+                              [1 ... (AZTECH_MAX - 1)] = -1 };
+static int radio_nr[AZTECH_MAX] = { [0 ... (AZTECH_MAX - 1)] = -1 };
+static const int radio_wait_time = 1000;
 
-struct aztech
-{
-        struct v4l2_device v4l2_dev;
-        struct video_device vdev;
-        int io;
+module_param_array(io, int, NULL, 0444);
+MODULE_PARM_DESC(io, "I/O addresses of the Aztech card (0x350 or 0x358)");
+module_param_array(radio_nr, int, NULL, 0444);
+MODULE_PARM_DESC(radio_nr, "Radio device numbers");
+
+struct aztech {
+        struct radio_isa_card isa;
         int curvol;
-        unsigned long curfreq;
-        int stereo;
-        struct mutex lock;
 };
 
-static struct aztech aztech_card;
-
-static int volconvert(int level)
-{
-        level >>= 14;           /* Map 16bits down to 2 bit */
-        level &= 3;
-
-        /* convert to card-friendly values */
-        switch (level) {
-        case 0:
-                return 0;
-        case 1:
-                return 1;
-        case 2:
-                return 4;
-        case 3:
-                return 5;
-        }
-        return 0;       /* Quieten gcc */
-}
-
 static void send_0_byte(struct aztech *az)
 {
         udelay(radio_wait_time);
-        outb_p(2 + volconvert(az->curvol), az->io);
-        outb_p(64 + 2 + volconvert(az->curvol), az->io);
+        outb_p(2 + az->curvol, az->isa.io);
+        outb_p(64 + 2 + az->curvol, az->isa.io);
 }
 
 static void send_1_byte(struct aztech *az)
 {
-        udelay (radio_wait_time);
-        outb_p(128 + 2 + volconvert(az->curvol), az->io);
-        outb_p(128 + 64 + 2 + volconvert(az->curvol), az->io);
-}
-
-static int az_setvol(struct aztech *az, int vol)
-{
-        mutex_lock(&az->lock);
-        outb(volconvert(vol), az->io);
-        mutex_unlock(&az->lock);
-        return 0;
-}
-
-/* thanks to Michael Dwyer for giving me a dose of clues in
- * the signal strength department..
- *
- * This card has a stereo bit - bit 0 set = mono, not set = stereo
- * It also has a "signal" bit - bit 1 set = bad signal, not set = good
- *
- */
-
-static int az_getsigstr(struct aztech *az)
-{
-        int sig = 1;
-
-        mutex_lock(&az->lock);
-        if (inb(az->io) & 2)    /* bit set = no signal present */
-                sig = 0;
-        mutex_unlock(&az->lock);
-        return sig;
+        udelay(radio_wait_time);
+        outb_p(128 + 2 + az->curvol, az->isa.io);
+        outb_p(128 + 64 + 2 + az->curvol, az->isa.io);
 }
 
-static int az_getstereo(struct aztech *az)
+static struct radio_isa_card *aztech_alloc(void)
 {
-        int stereo = 1;
+        struct aztech *az = kzalloc(sizeof(*az), GFP_KERNEL);
 
-        mutex_lock(&az->lock);
-        if (inb(az->io) & 1)    /* bit set = mono */
-                stereo = 0;
-        mutex_unlock(&az->lock);
-        return stereo;
+        return az ? &az->isa : NULL;
 }
 
-static int az_setfreq(struct aztech *az, unsigned long frequency)
+static int aztech_s_frequency(struct radio_isa_card *isa, u32 freq)
 {
+        struct aztech *az = container_of(isa, struct aztech, isa);
         int  i;
 
-        mutex_lock(&az->lock);
-
-        az->curfreq = frequency;
-        frequency += 171200;            /* Add 10.7 MHz IF              */
-        frequency /= 800;               /* Convert to 50 kHz units      */
+        freq += 171200;                 /* Add 10.7 MHz IF              */
+        freq /= 800;                    /* Convert to 50 kHz units      */
 
         send_0_byte(az);                /*  0: LSB of frequency       */
 
         for (i = 0; i < 13; i++)        /*   : frequency bits (1-13)  */
-                if (frequency & (1 << i))
+                if (freq & (1 << i))
                         send_1_byte(az);
                 else
                         send_0_byte(az);
@@ -158,7 +93,7 @@ static int az_setfreq(struct aztech *az, unsigned long frequency)
         send_0_byte(az);                /* 14: test bit - always 0    */
         send_0_byte(az);                /* 15: test bit - always 0    */
         send_0_byte(az);                /* 16: band data 0 - always 0 */
-        if (az->stereo)         /* 17: stereo (1 to enable)   */
+        if (isa->stereo)                /* 17: stereo (1 to enable)   */
                 send_1_byte(az);
         else
                 send_0_byte(az);
@@ -173,225 +108,77 @@ static int az_setfreq(struct aztech *az, unsigned long frequency)
         /* latch frequency */
 
         udelay(radio_wait_time);
-        outb_p(128 + 64 + volconvert(az->curvol), az->io);
-
-        mutex_unlock(&az->lock);
-
-        return 0;
-}
-
-static int vidioc_querycap(struct file *file, void  *priv,
-                                        struct v4l2_capability *v)
-{
-        strlcpy(v->driver, "radio-aztech", sizeof(v->driver));
-        strlcpy(v->card, "Aztech Radio", sizeof(v->card));
-        strlcpy(v->bus_info, "ISA", sizeof(v->bus_info));
-        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 aztech *az = video_drvdata(file);
-
-        if (v->index > 0)
-                return -EINVAL;
-
-        strlcpy(v->name, "FM", sizeof(v->name));
-        v->type = V4L2_TUNER_RADIO;
-
-        v->rangelow = 87 * 16000;
-        v->rangehigh = 108 * 16000;
-        v->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
-        v->capability = V4L2_TUNER_CAP_LOW;
-        if (az_getstereo(az))
-                v->audmode = V4L2_TUNER_MODE_STEREO;
-        else
-                v->audmode = V4L2_TUNER_MODE_MONO;
-        v->signal = 0xFFFF * az_getsigstr(az);
-
-        return 0;
-}
-
-static int vidioc_s_tuner(struct file *file, void *priv,
-                                struct v4l2_tuner *v)
-{
-        return v->index ? -EINVAL : 0;
-}
+        outb_p(128 + 64 + az->curvol, az->isa.io);
 
-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)
+/* thanks to Michael Dwyer for giving me a dose of clues in
+ * the signal strength department..
+ *
+ * This card has a stereo bit - bit 0 set = mono, not set = stereo
+ */
+static u32 aztech_g_rxsubchans(struct radio_isa_card *isa)
 {
-        return a->index ? -EINVAL : 0;
+        if (inb(isa->io) & 1)
+                return V4L2_TUNER_SUB_MONO;
+        return V4L2_TUNER_SUB_STEREO;
 }
 
-static int vidioc_s_frequency(struct file *file, void *priv,
-                                struct v4l2_frequency *f)
+static int aztech_s_stereo(struct radio_isa_card *isa, bool stereo)
 {
-        struct aztech *az = video_drvdata(file);
-
-        if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
-                return -EINVAL;
-        az_setfreq(az, f->frequency);
-        return 0;
+        return aztech_s_frequency(isa, isa->freq);
 }
 
-static int vidioc_g_frequency(struct file *file, void *priv,
-                                struct v4l2_frequency *f)
+static int aztech_s_mute_volume(struct radio_isa_card *isa, bool mute, int vol)
 {
-        struct aztech *az = video_drvdata(file);
+        struct aztech *az = container_of(isa, struct aztech, isa);
 
-        if (f->tuner != 0)
-                return -EINVAL;
-        f->type = V4L2_TUNER_RADIO;
-        f->frequency = az->curfreq;
+        if (mute)
+                vol = 0;
+        az->curvol = (vol & 1) + ((vol & 2) << 1);
+        outb(az->curvol, isa->io);
         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);
-        case V4L2_CID_AUDIO_VOLUME:
-                return v4l2_ctrl_query_fill(qc, 0, 0xff, 1, 0xff);
-        }
-        return -EINVAL;
-}
-
-static int vidioc_g_ctrl(struct file *file, void *priv,
-                            struct v4l2_control *ctrl)
-{
-        struct aztech *az = video_drvdata(file);
-
-        switch (ctrl->id) {
-        case V4L2_CID_AUDIO_MUTE:
-                if (az->curvol == 0)
-                        ctrl->value = 1;
-                else
-                        ctrl->value = 0;
-                return 0;
-        case V4L2_CID_AUDIO_VOLUME:
-                ctrl->value = az->curvol * 6554;
-                return 0;
-        }
-        return -EINVAL;
-}
-
-static int vidioc_s_ctrl(struct file *file, void *priv,
-                            struct v4l2_control *ctrl)
-{
-        struct aztech *az = video_drvdata(file);
-
-        switch (ctrl->id) {
-        case V4L2_CID_AUDIO_MUTE:
-                if (ctrl->value)
-                        az_setvol(az, 0);
-                else
-                        az_setvol(az, az->curvol);
-                return 0;
-        case V4L2_CID_AUDIO_VOLUME:
-                az_setvol(az, ctrl->value);
-                return 0;
-        }
-        return -EINVAL;
-}
-
-static const struct v4l2_file_operations aztech_fops = {
-        .owner          = THIS_MODULE,
-        .unlocked_ioctl = video_ioctl2,
+static const struct radio_isa_ops aztech_ops = {
+        .alloc = aztech_alloc,
+        .s_mute_volume = aztech_s_mute_volume,
+        .s_frequency = aztech_s_frequency,
+        .s_stereo = aztech_s_stereo,
+        .g_rxsubchans = aztech_g_rxsubchans,
 };
 
-static const struct v4l2_ioctl_ops aztech_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 const int aztech_ioports[] = { 0x350, 0x358 };
+
+static struct radio_isa_driver aztech_driver = {
+        .driver = {
+                .match          = radio_isa_match,
+                .probe          = radio_isa_probe,
+                .remove         = radio_isa_remove,
+                .driver         = {
+                        .name   = "radio-aztech",
+                },
+        },
+        .io_params = io,
+        .radio_nr_params = radio_nr,
+        .io_ports = aztech_ioports,
+        .num_of_io_ports = ARRAY_SIZE(aztech_ioports),
+        .region_size = 2,
+        .card = "Aztech Radio",
+        .ops = &aztech_ops,
+        .has_stereo = true,
+        .max_volume = 3,
 };
 
 static int __init aztech_init(void)
 {
-        struct aztech *az = &aztech_card;
-        struct v4l2_device *v4l2_dev = &az->v4l2_dev;
-        int res;
-
-        strlcpy(v4l2_dev->name, "aztech", sizeof(v4l2_dev->name));
-        az->io = io;
-
-        if (az->io == -1) {
-                v4l2_err(v4l2_dev, "you must set an I/O address with io=0x350 or 0x358\n");
-                return -EINVAL;
-        }
-
-        if (!request_region(az->io, 2, "aztech")) {
-                v4l2_err(v4l2_dev, "port 0x%x already in use\n", az->io);
-                return -EBUSY;
-        }
-
-        res = v4l2_device_register(NULL, v4l2_dev);
-        if (res < 0) {
-                release_region(az->io, 2);
-                v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
-                return res;
-        }
-
-        mutex_init(&az->lock);
-        strlcpy(az->vdev.name, v4l2_dev->name, sizeof(az->vdev.name));
-        az->vdev.v4l2_dev = v4l2_dev;
-        az->vdev.fops = &aztech_fops;
-        az->vdev.ioctl_ops = &aztech_ioctl_ops;
-        az->vdev.release = video_device_release_empty;
-        video_set_drvdata(&az->vdev, az);
-        /* mute card - prevents noisy bootups */
-        outb(0, az->io);
-
-        if (video_register_device(&az->vdev, VFL_TYPE_RADIO, radio_nr) < 0) {
-                v4l2_device_unregister(v4l2_dev);
-                release_region(az->io, 2);
-                return -EINVAL;
-        }
-
-        v4l2_info(v4l2_dev, "Aztech radio card driver v1.00/19990224 rkroll@exploits.org\n");
-        return 0;
+        return isa_register_driver(&aztech_driver.driver, AZTECH_MAX);
 }
 
 static void __exit aztech_exit(void)
 {
-        struct aztech *az = &aztech_card;
-
-        video_unregister_device(&az->vdev);
-        v4l2_device_unregister(&az->v4l2_dev);
-        release_region(az->io, 2);
+        isa_unregister_driver(&aztech_driver.driver);
 }
 
 module_init(aztech_init);