435 lines
10 KiB
C
435 lines
10 KiB
C
/* radio-trust.c - Trust FM Radio card driver for Linux 2.2
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* by Eric Lammerts <eric@scintilla.utwente.nl>
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*
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* Based on radio-aztech.c. Original notes:
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*
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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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* Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
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*/
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#include <stdarg.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/ioport.h>
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#include <linux/version.h> /* for KERNEL_VERSION MACRO */
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#include <linux/videodev2.h>
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#include <linux/io.h>
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#include <media/v4l2-device.h>
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#include <media/v4l2-ioctl.h>
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MODULE_AUTHOR("Eric Lammerts, Russell Kroll, Quay Lu, Donald Song, Jason Lewis, Scott McGrath, William McGrath");
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MODULE_DESCRIPTION("A driver for the Trust FM 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_TRUST_PORT
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#define CONFIG_RADIO_TRUST_PORT -1
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#endif
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static int io = CONFIG_RADIO_TRUST_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 Trust FM Radio card (0x350 or 0x358)");
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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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struct trust {
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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 ioval;
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__u16 curvol;
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__u16 curbass;
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__u16 curtreble;
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int muted;
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unsigned long curfreq;
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int curstereo;
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int curmute;
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struct mutex lock;
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};
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static struct trust trust_card;
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/* i2c addresses */
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#define TDA7318_ADDR 0x88
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#define TSA6060T_ADDR 0xc4
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#define TR_DELAY do { inb(tr->io); inb(tr->io); inb(tr->io); } while (0)
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#define TR_SET_SCL outb(tr->ioval |= 2, tr->io)
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#define TR_CLR_SCL outb(tr->ioval &= 0xfd, tr->io)
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#define TR_SET_SDA outb(tr->ioval |= 1, tr->io)
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#define TR_CLR_SDA outb(tr->ioval &= 0xfe, tr->io)
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static void write_i2c(struct trust *tr, int n, ...)
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{
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unsigned char val, mask;
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va_list args;
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va_start(args, n);
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/* start condition */
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TR_SET_SDA;
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TR_SET_SCL;
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TR_DELAY;
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TR_CLR_SDA;
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TR_CLR_SCL;
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TR_DELAY;
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for(; n; n--) {
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val = va_arg(args, unsigned);
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for(mask = 0x80; mask; mask >>= 1) {
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if(val & mask)
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TR_SET_SDA;
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else
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TR_CLR_SDA;
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TR_SET_SCL;
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TR_DELAY;
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TR_CLR_SCL;
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TR_DELAY;
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}
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/* acknowledge bit */
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TR_SET_SDA;
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TR_SET_SCL;
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TR_DELAY;
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TR_CLR_SCL;
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TR_DELAY;
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}
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/* stop condition */
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TR_CLR_SDA;
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TR_DELAY;
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TR_SET_SCL;
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TR_DELAY;
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TR_SET_SDA;
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TR_DELAY;
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va_end(args);
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}
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static void tr_setvol(struct trust *tr, __u16 vol)
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{
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mutex_lock(&tr->lock);
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tr->curvol = vol / 2048;
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write_i2c(tr, 2, TDA7318_ADDR, tr->curvol ^ 0x1f);
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mutex_unlock(&tr->lock);
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}
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static int basstreble2chip[15] = {
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0, 1, 2, 3, 4, 5, 6, 7, 14, 13, 12, 11, 10, 9, 8
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};
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static void tr_setbass(struct trust *tr, __u16 bass)
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{
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mutex_lock(&tr->lock);
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tr->curbass = bass / 4370;
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write_i2c(tr, 2, TDA7318_ADDR, 0x60 | basstreble2chip[tr->curbass]);
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mutex_unlock(&tr->lock);
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}
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static void tr_settreble(struct trust *tr, __u16 treble)
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{
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mutex_lock(&tr->lock);
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tr->curtreble = treble / 4370;
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write_i2c(tr, 2, TDA7318_ADDR, 0x70 | basstreble2chip[tr->curtreble]);
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mutex_unlock(&tr->lock);
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}
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static void tr_setstereo(struct trust *tr, int stereo)
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{
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mutex_lock(&tr->lock);
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tr->curstereo = !!stereo;
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tr->ioval = (tr->ioval & 0xfb) | (!tr->curstereo << 2);
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outb(tr->ioval, tr->io);
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mutex_unlock(&tr->lock);
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}
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static void tr_setmute(struct trust *tr, int mute)
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{
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mutex_lock(&tr->lock);
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tr->curmute = !!mute;
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tr->ioval = (tr->ioval & 0xf7) | (tr->curmute << 3);
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outb(tr->ioval, tr->io);
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mutex_unlock(&tr->lock);
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}
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static int tr_getsigstr(struct trust *tr)
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{
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int i, v;
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mutex_lock(&tr->lock);
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for (i = 0, v = 0; i < 100; i++)
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v |= inb(tr->io);
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mutex_unlock(&tr->lock);
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return (v & 1) ? 0 : 0xffff;
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}
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static int tr_getstereo(struct trust *tr)
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{
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/* don't know how to determine it, just return the setting */
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return tr->curstereo;
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}
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static void tr_setfreq(struct trust *tr, unsigned long f)
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{
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mutex_lock(&tr->lock);
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tr->curfreq = f;
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f /= 160; /* Convert to 10 kHz units */
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f += 1070; /* Add 10.7 MHz IF */
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write_i2c(tr, 5, TSA6060T_ADDR, (f << 1) | 1, f >> 7, 0x60 | ((f >> 15) & 1), 0);
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mutex_unlock(&tr->lock);
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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-trust", sizeof(v->driver));
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strlcpy(v->card, "Trust FM 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 trust *tr = 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 = 87.5 * 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 (tr_getstereo(tr))
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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 = tr_getsigstr(tr);
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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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struct trust *tr = video_drvdata(file);
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if (v->index)
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return -EINVAL;
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tr_setstereo(tr, v->audmode == V4L2_TUNER_MODE_STEREO);
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return 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 trust *tr = video_drvdata(file);
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if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
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return -EINVAL;
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tr_setfreq(tr, 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 trust *tr = video_drvdata(file);
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if (f->tuner != 0)
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return -EINVAL;
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f->type = V4L2_TUNER_RADIO;
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f->frequency = tr->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, 65535, 2048, 65535);
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case V4L2_CID_AUDIO_BASS:
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case V4L2_CID_AUDIO_TREBLE:
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return v4l2_ctrl_query_fill(qc, 0, 65535, 4370, 32768);
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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 trust *tr = video_drvdata(file);
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switch (ctrl->id) {
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case V4L2_CID_AUDIO_MUTE:
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ctrl->value = tr->curmute;
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return 0;
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case V4L2_CID_AUDIO_VOLUME:
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ctrl->value = tr->curvol * 2048;
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return 0;
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case V4L2_CID_AUDIO_BASS:
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ctrl->value = tr->curbass * 4370;
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return 0;
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case V4L2_CID_AUDIO_TREBLE:
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ctrl->value = tr->curtreble * 4370;
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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 trust *tr = video_drvdata(file);
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switch (ctrl->id) {
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case V4L2_CID_AUDIO_MUTE:
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tr_setmute(tr, ctrl->value);
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return 0;
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case V4L2_CID_AUDIO_VOLUME:
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tr_setvol(tr, ctrl->value);
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return 0;
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case V4L2_CID_AUDIO_BASS:
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tr_setbass(tr, ctrl->value);
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return 0;
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case V4L2_CID_AUDIO_TREBLE:
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tr_settreble(tr, 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 trust_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 trust_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 trust_init(void)
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{
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struct trust *tr = &trust_card;
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struct v4l2_device *v4l2_dev = &tr->v4l2_dev;
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int res;
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strlcpy(v4l2_dev->name, "trust", sizeof(v4l2_dev->name));
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tr->io = io;
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tr->ioval = 0xf;
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mutex_init(&tr->lock);
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if (tr->io == -1) {
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v4l2_err(v4l2_dev, "You must set an I/O address with io=0x0x350 or 0x358\n");
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return -EINVAL;
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}
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if (!request_region(tr->io, 2, "Trust FM Radio")) {
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v4l2_err(v4l2_dev, "port 0x%x already in use\n", tr->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(tr->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(tr->vdev.name, v4l2_dev->name, sizeof(tr->vdev.name));
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tr->vdev.v4l2_dev = v4l2_dev;
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tr->vdev.fops = &trust_fops;
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tr->vdev.ioctl_ops = &trust_ioctl_ops;
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tr->vdev.release = video_device_release_empty;
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video_set_drvdata(&tr->vdev, tr);
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if (video_register_device(&tr->vdev, VFL_TYPE_RADIO, radio_nr) < 0) {
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v4l2_device_unregister(v4l2_dev);
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release_region(tr->io, 2);
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return -EINVAL;
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}
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v4l2_info(v4l2_dev, "Trust FM Radio card driver v1.0.\n");
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write_i2c(tr, 2, TDA7318_ADDR, 0x80); /* speaker att. LF = 0 dB */
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write_i2c(tr, 2, TDA7318_ADDR, 0xa0); /* speaker att. RF = 0 dB */
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write_i2c(tr, 2, TDA7318_ADDR, 0xc0); /* speaker att. LR = 0 dB */
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write_i2c(tr, 2, TDA7318_ADDR, 0xe0); /* speaker att. RR = 0 dB */
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write_i2c(tr, 2, TDA7318_ADDR, 0x40); /* stereo 1 input, gain = 18.75 dB */
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tr_setvol(tr, 0xffff);
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tr_setbass(tr, 0x8000);
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tr_settreble(tr, 0x8000);
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tr_setstereo(tr, 1);
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/* mute card - prevents noisy bootups */
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tr_setmute(tr, 1);
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return 0;
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}
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static void __exit cleanup_trust_module(void)
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{
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struct trust *tr = &trust_card;
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video_unregister_device(&tr->vdev);
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v4l2_device_unregister(&tr->v4l2_dev);
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release_region(tr->io, 2);
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}
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module_init(trust_init);
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module_exit(cleanup_trust_module);
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