mirror of https://gitee.com/openkylin/linux.git
415 lines
9.8 KiB
C
415 lines
9.8 KiB
C
/* Terratec ActiveRadio ISA Standalone card driver for Linux radio support
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* (c) 1999 R. Offermanns (rolf@offermanns.de)
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* based on the aimslab radio driver from M. Kirkwood
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* many thanks to Michael Becker and Friedhelm Birth (from TerraTec)
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*
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*
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* History:
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* 1999-05-21 First preview release
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*
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* Notes on the hardware:
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* There are two "main" chips on the card:
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* - Philips OM5610 (http://www-us.semiconductors.philips.com/acrobat/datasheets/OM5610_2.pdf)
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* - Philips SAA6588 (http://www-us.semiconductors.philips.com/acrobat/datasheets/SAA6588_1.pdf)
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* (you can get the datasheet at the above links)
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*
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* Frequency control is done digitally -- ie out(port,encodefreq(95.8));
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* Volume Control is done digitally
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*
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* there is a I2C controlled RDS decoder (SAA6588) onboard, which i would like to support someday
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* (as soon i have understand how to get started :)
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* If you can help me out with that, please contact me!!
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*
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*
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* Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
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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/videodev2.h> /* kernel radio structs */
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#include <linux/mutex.h>
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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("R.OFFERMANNS & others");
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MODULE_DESCRIPTION("A driver for the TerraTec ActiveRadio Standalone radio card.");
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MODULE_LICENSE("GPL");
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#ifndef CONFIG_RADIO_TERRATEC_PORT
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#define CONFIG_RADIO_TERRATEC_PORT 0x590
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#endif
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static int io = CONFIG_RADIO_TERRATEC_PORT;
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static int radio_nr = -1;
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module_param(io, int, 0);
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MODULE_PARM_DESC(io, "I/O address of the TerraTec ActiveRadio card (0x590 or 0x591)");
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module_param(radio_nr, int, 0);
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#define RADIO_VERSION KERNEL_VERSION(0, 0, 2)
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static struct v4l2_queryctrl radio_qctrl[] = {
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{
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.id = V4L2_CID_AUDIO_MUTE,
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.name = "Mute",
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.minimum = 0,
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.maximum = 1,
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.default_value = 1,
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.type = V4L2_CTRL_TYPE_BOOLEAN,
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},{
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.id = V4L2_CID_AUDIO_VOLUME,
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.name = "Volume",
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.minimum = 0,
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.maximum = 0xff,
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.step = 1,
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.default_value = 0xff,
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.type = V4L2_CTRL_TYPE_INTEGER,
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}
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};
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#define WRT_DIS 0x00
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#define CLK_OFF 0x00
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#define IIC_DATA 0x01
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#define IIC_CLK 0x02
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#define DATA 0x04
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#define CLK_ON 0x08
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#define WRT_EN 0x10
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struct terratec
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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 muted;
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struct mutex lock;
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};
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static struct terratec terratec_card;
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/* local things */
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static void tt_write_vol(struct terratec *tt, int volume)
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{
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int i;
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volume = volume + (volume * 32); /* change both channels */
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mutex_lock(&tt->lock);
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for (i = 0; i < 8; i++) {
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if (volume & (0x80 >> i))
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outb(0x80, tt->io + 1);
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else
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outb(0x00, tt->io + 1);
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}
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mutex_unlock(&tt->lock);
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}
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static void tt_mute(struct terratec *tt)
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{
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tt->muted = 1;
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tt_write_vol(tt, 0);
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}
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static int tt_setvol(struct terratec *tt, int vol)
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{
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if (vol == tt->curvol) { /* requested volume = current */
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if (tt->muted) { /* user is unmuting the card */
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tt->muted = 0;
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tt_write_vol(tt, vol); /* enable card */
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}
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return 0;
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}
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if (vol == 0) { /* volume = 0 means mute the card */
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tt_write_vol(tt, 0); /* "turn off card" by setting vol to 0 */
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tt->curvol = vol; /* track the volume state! */
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return 0;
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}
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tt->muted = 0;
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tt_write_vol(tt, vol);
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tt->curvol = vol;
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return 0;
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}
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/* this is the worst part in this driver */
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/* many more or less strange things are going on here, but hey, it works :) */
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static int tt_setfreq(struct terratec *tt, unsigned long freq1)
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{
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int freq;
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int i;
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int p;
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int temp;
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long rest;
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unsigned char buffer[25]; /* we have to bit shift 25 registers */
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mutex_lock(&tt->lock);
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tt->curfreq = freq1;
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freq = freq1 / 160; /* convert the freq. to a nice to handle value */
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memset(buffer, 0, sizeof(buffer));
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rest = freq * 10 + 10700; /* I once had understood what is going on here */
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/* maybe some wise guy (friedhelm?) can comment this stuff */
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i = 13;
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p = 10;
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temp = 102400;
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while (rest != 0) {
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if (rest % temp == rest)
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buffer[i] = 0;
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else {
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buffer[i] = 1;
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rest = rest - temp;
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}
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i--;
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p--;
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temp = temp / 2;
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}
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for (i = 24; i > -1; i--) { /* bit shift the values to the radiocard */
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if (buffer[i] == 1) {
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outb(WRT_EN | DATA, tt->io);
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outb(WRT_EN | DATA | CLK_ON, tt->io);
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outb(WRT_EN | DATA, tt->io);
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} else {
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outb(WRT_EN | 0x00, tt->io);
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outb(WRT_EN | 0x00 | CLK_ON, tt->io);
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}
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}
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outb(0x00, tt->io);
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mutex_unlock(&tt->lock);
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return 0;
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}
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static int tt_getsigstr(struct terratec *tt)
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{
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if (inb(tt->io) & 2) /* bit set = no signal present */
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return 0;
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return 1; /* signal present */
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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-terratec", sizeof(v->driver));
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strlcpy(v->card, "ActiveRadio", 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 terratec *tt = 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;
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v->capability = V4L2_TUNER_CAP_LOW;
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v->audmode = V4L2_TUNER_MODE_MONO;
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v->signal = 0xFFFF * tt_getsigstr(tt);
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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_s_frequency(struct file *file, void *priv,
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struct v4l2_frequency *f)
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{
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struct terratec *tt = video_drvdata(file);
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tt_setfreq(tt, 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 terratec *tt = video_drvdata(file);
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f->type = V4L2_TUNER_RADIO;
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f->frequency = tt->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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int i;
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for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
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if (qc->id && qc->id == radio_qctrl[i].id) {
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memcpy(qc, &(radio_qctrl[i]), sizeof(*qc));
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return 0;
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}
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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 terratec *tt = video_drvdata(file);
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switch (ctrl->id) {
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case V4L2_CID_AUDIO_MUTE:
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if (tt->muted)
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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 = tt->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 terratec *tt = 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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tt_mute(tt);
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else
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tt_setvol(tt,tt->curvol);
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return 0;
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case V4L2_CID_AUDIO_VOLUME:
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tt_setvol(tt,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 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 const struct v4l2_file_operations terratec_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 terratec_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_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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.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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};
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static int __init terratec_init(void)
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{
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struct terratec *tt = &terratec_card;
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struct v4l2_device *v4l2_dev = &tt->v4l2_dev;
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int res;
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strlcpy(v4l2_dev->name, "terratec", sizeof(v4l2_dev->name));
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tt->io = io;
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if (tt->io == -1) {
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v4l2_err(v4l2_dev, "you must set an I/O address with io=0x590 or 0x591\n");
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return -EINVAL;
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}
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if (!request_region(tt->io, 2, "terratec")) {
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v4l2_err(v4l2_dev, "port 0x%x already in use\n", 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(tt->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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strlcpy(tt->vdev.name, v4l2_dev->name, sizeof(tt->vdev.name));
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tt->vdev.v4l2_dev = v4l2_dev;
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tt->vdev.fops = &terratec_fops;
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tt->vdev.ioctl_ops = &terratec_ioctl_ops;
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tt->vdev.release = video_device_release_empty;
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video_set_drvdata(&tt->vdev, tt);
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mutex_init(&tt->lock);
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if (video_register_device(&tt->vdev, VFL_TYPE_RADIO, radio_nr) < 0) {
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v4l2_device_unregister(&tt->v4l2_dev);
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release_region(tt->io, 2);
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return -EINVAL;
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}
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v4l2_info(v4l2_dev, "TERRATEC ActivRadio Standalone card driver.\n");
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/* mute card - prevents noisy bootups */
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tt_write_vol(tt, 0);
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return 0;
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}
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static void __exit terratec_exit(void)
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{
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struct terratec *tt = &terratec_card;
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struct v4l2_device *v4l2_dev = &tt->v4l2_dev;
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video_unregister_device(&tt->vdev);
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v4l2_device_unregister(&tt->v4l2_dev);
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release_region(tt->io, 2);
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v4l2_info(v4l2_dev, "TERRATEC ActivRadio Standalone card driver unloaded.\n");
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}
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module_init(terratec_init);
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module_exit(terratec_exit);
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