![Alexey Klimov](/assets/img/avatar_default.png)
Patch removes empty open and release functions in pci and isa radio drivers, setting them to NULL. V4L module doesn't call for them due to previous patch. Signed-off-by: Alexey Klimov <klimov.linux@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
398 lines
9.5 KiB
C
398 lines
9.5 KiB
C
/* radio-aztech.c - Aztech radio card driver for Linux 2.2
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*
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* Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
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* Adapted to support the Video for Linux API by
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* Russell Kroll <rkroll@exploits.org>. Based on original tuner code by:
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*
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* Quay Ly
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* Donald Song
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* Jason Lewis (jlewis@twilight.vtc.vsc.edu)
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* Scott McGrath (smcgrath@twilight.vtc.vsc.edu)
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* William McGrath (wmcgrath@twilight.vtc.vsc.edu)
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*
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* The basis for this code may be found at http://bigbang.vtc.vsc.edu/fmradio/
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* along with more information on the card itself.
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*
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* History:
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* 1999-02-24 Russell Kroll <rkroll@exploits.org>
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* Fine tuning/VIDEO_TUNER_LOW
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* Range expanded to 87-108 MHz (from 87.9-107.8)
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*
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* Notable changes from the original source:
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* - includes stripped down to the essentials
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* - for loops used as delays replaced with udelay()
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* - #defines removed, changed to static values
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* - tuning structure changed - no more character arrays, other changes
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*/
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#include <linux/module.h> /* Modules */
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#include <linux/init.h> /* Initdata */
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#include <linux/ioport.h> /* request_region */
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#include <linux/delay.h> /* udelay */
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#include <linux/videodev2.h> /* kernel radio structs */
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#include <linux/version.h> /* for KERNEL_VERSION MACRO */
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#include <linux/io.h> /* outb, outb_p */
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#include <media/v4l2-device.h>
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#include <media/v4l2-ioctl.h>
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MODULE_AUTHOR("Russell Kroll, Quay Lu, Donald Song, Jason Lewis, Scott McGrath, William McGrath");
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MODULE_DESCRIPTION("A driver for the Aztech radio card.");
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MODULE_LICENSE("GPL");
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/* acceptable ports: 0x350 (JP3 shorted), 0x358 (JP3 open) */
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#ifndef CONFIG_RADIO_AZTECH_PORT
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#define CONFIG_RADIO_AZTECH_PORT -1
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#endif
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static int io = CONFIG_RADIO_AZTECH_PORT;
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static int radio_nr = -1;
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static int radio_wait_time = 1000;
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module_param(io, int, 0);
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module_param(radio_nr, int, 0);
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MODULE_PARM_DESC(io, "I/O address of the Aztech card (0x350 or 0x358)");
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#define RADIO_VERSION KERNEL_VERSION(0, 0, 2)
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struct aztech
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{
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struct v4l2_device v4l2_dev;
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struct video_device vdev;
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int io;
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int curvol;
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unsigned long curfreq;
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int stereo;
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struct mutex lock;
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};
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static struct aztech aztech_card;
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static int volconvert(int level)
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{
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level >>= 14; /* Map 16bits down to 2 bit */
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level &= 3;
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/* convert to card-friendly values */
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switch (level) {
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case 0:
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return 0;
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case 1:
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return 1;
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case 2:
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return 4;
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case 3:
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return 5;
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}
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return 0; /* Quieten gcc */
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}
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static void send_0_byte(struct aztech *az)
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{
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udelay(radio_wait_time);
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outb_p(2 + volconvert(az->curvol), az->io);
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outb_p(64 + 2 + volconvert(az->curvol), az->io);
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}
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static void send_1_byte(struct aztech *az)
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{
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udelay (radio_wait_time);
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outb_p(128 + 2 + volconvert(az->curvol), az->io);
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outb_p(128 + 64 + 2 + volconvert(az->curvol), az->io);
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}
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static int az_setvol(struct aztech *az, int vol)
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{
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mutex_lock(&az->lock);
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outb(volconvert(vol), az->io);
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mutex_unlock(&az->lock);
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return 0;
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}
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/* thanks to Michael Dwyer for giving me a dose of clues in
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* the signal strength department..
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*
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* This card has a stereo bit - bit 0 set = mono, not set = stereo
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* It also has a "signal" bit - bit 1 set = bad signal, not set = good
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*
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*/
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static int az_getsigstr(struct aztech *az)
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{
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int sig = 1;
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mutex_lock(&az->lock);
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if (inb(az->io) & 2) /* bit set = no signal present */
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sig = 0;
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mutex_unlock(&az->lock);
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return sig;
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}
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static int az_getstereo(struct aztech *az)
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{
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int stereo = 1;
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mutex_lock(&az->lock);
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if (inb(az->io) & 1) /* bit set = mono */
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stereo = 0;
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mutex_unlock(&az->lock);
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return stereo;
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}
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static int az_setfreq(struct aztech *az, unsigned long frequency)
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{
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int i;
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mutex_lock(&az->lock);
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az->curfreq = frequency;
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frequency += 171200; /* Add 10.7 MHz IF */
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frequency /= 800; /* Convert to 50 kHz units */
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send_0_byte(az); /* 0: LSB of frequency */
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for (i = 0; i < 13; i++) /* : frequency bits (1-13) */
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if (frequency & (1 << i))
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send_1_byte(az);
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else
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send_0_byte(az);
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send_0_byte(az); /* 14: test bit - always 0 */
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send_0_byte(az); /* 15: test bit - always 0 */
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send_0_byte(az); /* 16: band data 0 - always 0 */
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if (az->stereo) /* 17: stereo (1 to enable) */
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send_1_byte(az);
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else
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send_0_byte(az);
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send_1_byte(az); /* 18: band data 1 - unknown */
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send_0_byte(az); /* 19: time base - always 0 */
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send_0_byte(az); /* 20: spacing (0 = 25 kHz) */
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send_1_byte(az); /* 21: spacing (1 = 25 kHz) */
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send_0_byte(az); /* 22: spacing (0 = 25 kHz) */
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send_1_byte(az); /* 23: AM/FM (FM = 1, always) */
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/* latch frequency */
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udelay(radio_wait_time);
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outb_p(128 + 64 + volconvert(az->curvol), az->io);
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mutex_unlock(&az->lock);
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return 0;
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}
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static int vidioc_querycap(struct file *file, void *priv,
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struct v4l2_capability *v)
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{
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strlcpy(v->driver, "radio-aztech", sizeof(v->driver));
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strlcpy(v->card, "Aztech Radio", sizeof(v->card));
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strlcpy(v->bus_info, "ISA", sizeof(v->bus_info));
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v->version = RADIO_VERSION;
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v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
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return 0;
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}
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static int vidioc_g_tuner(struct file *file, void *priv,
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struct v4l2_tuner *v)
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{
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struct aztech *az = video_drvdata(file);
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if (v->index > 0)
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return -EINVAL;
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strlcpy(v->name, "FM", sizeof(v->name));
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v->type = V4L2_TUNER_RADIO;
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v->rangelow = 87 * 16000;
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v->rangehigh = 108 * 16000;
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v->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
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v->capability = V4L2_TUNER_CAP_LOW;
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if (az_getstereo(az))
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v->audmode = V4L2_TUNER_MODE_STEREO;
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else
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v->audmode = V4L2_TUNER_MODE_MONO;
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v->signal = 0xFFFF * az_getsigstr(az);
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return 0;
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}
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static int vidioc_s_tuner(struct file *file, void *priv,
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struct v4l2_tuner *v)
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{
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return v->index ? -EINVAL : 0;
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}
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static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
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{
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*i = 0;
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return 0;
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}
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static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
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{
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return i ? -EINVAL : 0;
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}
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static int vidioc_g_audio(struct file *file, void *priv,
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struct v4l2_audio *a)
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{
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a->index = 0;
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strlcpy(a->name, "Radio", sizeof(a->name));
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a->capability = V4L2_AUDCAP_STEREO;
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return 0;
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}
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static int vidioc_s_audio(struct file *file, void *priv,
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struct v4l2_audio *a)
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{
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return a->index ? -EINVAL : 0;
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}
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static int vidioc_s_frequency(struct file *file, void *priv,
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struct v4l2_frequency *f)
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{
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struct aztech *az = video_drvdata(file);
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az_setfreq(az, f->frequency);
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return 0;
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}
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static int vidioc_g_frequency(struct file *file, void *priv,
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struct v4l2_frequency *f)
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{
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struct aztech *az = video_drvdata(file);
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f->type = V4L2_TUNER_RADIO;
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f->frequency = az->curfreq;
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return 0;
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}
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static int vidioc_queryctrl(struct file *file, void *priv,
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struct v4l2_queryctrl *qc)
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{
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switch (qc->id) {
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case V4L2_CID_AUDIO_MUTE:
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return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
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case V4L2_CID_AUDIO_VOLUME:
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return v4l2_ctrl_query_fill(qc, 0, 0xff, 1, 0xff);
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}
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return -EINVAL;
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}
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static int vidioc_g_ctrl(struct file *file, void *priv,
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struct v4l2_control *ctrl)
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{
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struct aztech *az = video_drvdata(file);
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switch (ctrl->id) {
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case V4L2_CID_AUDIO_MUTE:
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if (az->curvol == 0)
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ctrl->value = 1;
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else
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ctrl->value = 0;
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return 0;
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case V4L2_CID_AUDIO_VOLUME:
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ctrl->value = az->curvol * 6554;
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return 0;
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}
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return -EINVAL;
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}
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static int vidioc_s_ctrl(struct file *file, void *priv,
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struct v4l2_control *ctrl)
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{
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struct aztech *az = video_drvdata(file);
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switch (ctrl->id) {
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case V4L2_CID_AUDIO_MUTE:
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if (ctrl->value)
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az_setvol(az, 0);
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else
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az_setvol(az, az->curvol);
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return 0;
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case V4L2_CID_AUDIO_VOLUME:
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az_setvol(az, ctrl->value);
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return 0;
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}
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return -EINVAL;
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}
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static const struct v4l2_file_operations aztech_fops = {
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.owner = THIS_MODULE,
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.ioctl = video_ioctl2,
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};
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static const struct v4l2_ioctl_ops aztech_ioctl_ops = {
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.vidioc_querycap = vidioc_querycap,
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.vidioc_g_tuner = vidioc_g_tuner,
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.vidioc_s_tuner = vidioc_s_tuner,
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.vidioc_g_audio = vidioc_g_audio,
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.vidioc_s_audio = vidioc_s_audio,
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.vidioc_g_input = vidioc_g_input,
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.vidioc_s_input = vidioc_s_input,
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.vidioc_g_frequency = vidioc_g_frequency,
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.vidioc_s_frequency = vidioc_s_frequency,
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.vidioc_queryctrl = vidioc_queryctrl,
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.vidioc_g_ctrl = vidioc_g_ctrl,
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.vidioc_s_ctrl = vidioc_s_ctrl,
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};
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static int __init aztech_init(void)
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{
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struct aztech *az = &aztech_card;
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struct v4l2_device *v4l2_dev = &az->v4l2_dev;
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int res;
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strlcpy(v4l2_dev->name, "aztech", sizeof(v4l2_dev->name));
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az->io = io;
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if (az->io == -1) {
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v4l2_err(v4l2_dev, "you must set an I/O address with io=0x350 or 0x358\n");
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return -EINVAL;
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}
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if (!request_region(az->io, 2, "aztech")) {
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v4l2_err(v4l2_dev, "port 0x%x already in use\n", az->io);
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return -EBUSY;
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}
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res = v4l2_device_register(NULL, v4l2_dev);
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if (res < 0) {
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release_region(az->io, 2);
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v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
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return res;
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}
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mutex_init(&az->lock);
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strlcpy(az->vdev.name, v4l2_dev->name, sizeof(az->vdev.name));
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az->vdev.v4l2_dev = v4l2_dev;
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az->vdev.fops = &aztech_fops;
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az->vdev.ioctl_ops = &aztech_ioctl_ops;
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az->vdev.release = video_device_release_empty;
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video_set_drvdata(&az->vdev, az);
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if (video_register_device(&az->vdev, VFL_TYPE_RADIO, radio_nr) < 0) {
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v4l2_device_unregister(v4l2_dev);
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release_region(az->io, 2);
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return -EINVAL;
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}
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v4l2_info(v4l2_dev, "Aztech radio card driver v1.00/19990224 rkroll@exploits.org\n");
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/* mute card - prevents noisy bootups */
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outb(0, az->io);
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return 0;
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}
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static void __exit aztech_exit(void)
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{
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struct aztech *az = &aztech_card;
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video_unregister_device(&az->vdev);
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v4l2_device_unregister(&az->v4l2_dev);
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release_region(az->io, 2);
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}
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module_init(aztech_init);
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module_exit(aztech_exit);
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