![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>
444 lines
11 KiB
C
444 lines
11 KiB
C
/* radiotrack (radioreveal) driver for Linux radio support
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* (c) 1997 M. Kirkwood
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* Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
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* Converted to new API by Alan Cox <alan@lxorguk.ukuu.org.uk>
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* Various bugfixes and enhancements by Russell Kroll <rkroll@exploits.org>
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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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* Frequency range expanded to start at 87 MHz
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*
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* TODO: Allow for more than one of these foolish entities :-)
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*
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* Notes on the hardware (reverse engineered from other peoples'
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* reverse engineering of AIMS' code :-)
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*
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* Frequency control is done digitally -- ie out(port,encodefreq(95.8));
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*
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* The signal strength query is unsurprisingly inaccurate. And it seems
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* to indicate that (on my card, at least) the frequency setting isn't
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* too great. (I have to tune up .025MHz from what the freq should be
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* to get a report that the thing is tuned.)
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*
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* Volume control is (ugh) analogue:
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* out(port, start_increasing_volume);
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* wait(a_wee_while);
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* out(port, stop_changing_the_volume);
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*
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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("M.Kirkwood");
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MODULE_DESCRIPTION("A driver for the RadioTrack/RadioReveal radio card.");
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MODULE_LICENSE("GPL");
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#ifndef CONFIG_RADIO_RTRACK_PORT
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#define CONFIG_RADIO_RTRACK_PORT -1
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#endif
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static int io = CONFIG_RADIO_RTRACK_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 RadioTrack card (0x20f or 0x30f)");
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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 rtrack
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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 port;
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int curvol;
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unsigned long curfreq;
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int muted;
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int io;
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struct mutex lock;
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};
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static struct rtrack rtrack_card;
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/* local things */
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static void sleep_delay(long n)
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{
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/* Sleep nicely for 'n' uS */
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int d = n / msecs_to_jiffies(1000);
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if (!d)
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udelay(n);
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else
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msleep(jiffies_to_msecs(d));
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}
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static void rt_decvol(struct rtrack *rt)
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{
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outb(0x58, rt->io); /* volume down + sigstr + on */
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sleep_delay(100000);
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outb(0xd8, rt->io); /* volume steady + sigstr + on */
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}
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static void rt_incvol(struct rtrack *rt)
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{
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outb(0x98, rt->io); /* volume up + sigstr + on */
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sleep_delay(100000);
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outb(0xd8, rt->io); /* volume steady + sigstr + on */
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}
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static void rt_mute(struct rtrack *rt)
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{
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rt->muted = 1;
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mutex_lock(&rt->lock);
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outb(0xd0, rt->io); /* volume steady, off */
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mutex_unlock(&rt->lock);
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}
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static int rt_setvol(struct rtrack *rt, int vol)
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{
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int i;
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mutex_lock(&rt->lock);
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if (vol == rt->curvol) { /* requested volume = current */
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if (rt->muted) { /* user is unmuting the card */
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rt->muted = 0;
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outb(0xd8, rt->io); /* enable card */
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}
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mutex_unlock(&rt->lock);
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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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outb(0x48, rt->io); /* volume down but still "on" */
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sleep_delay(2000000); /* make sure it's totally down */
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outb(0xd0, rt->io); /* volume steady, off */
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rt->curvol = 0; /* track the volume state! */
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mutex_unlock(&rt->lock);
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return 0;
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}
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rt->muted = 0;
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if (vol > rt->curvol)
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for (i = rt->curvol; i < vol; i++)
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rt_incvol(rt);
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else
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for (i = rt->curvol; i > vol; i--)
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rt_decvol(rt);
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rt->curvol = vol;
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mutex_unlock(&rt->lock);
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return 0;
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}
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/* the 128+64 on these outb's is to keep the volume stable while tuning
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* without them, the volume _will_ creep up with each frequency change
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* and bit 4 (+16) is to keep the signal strength meter enabled
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*/
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static void send_0_byte(struct rtrack *rt)
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{
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if (rt->curvol == 0 || rt->muted) {
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outb_p(128+64+16+ 1, rt->io); /* wr-enable + data low */
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outb_p(128+64+16+2+1, rt->io); /* clock */
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}
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else {
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outb_p(128+64+16+8+ 1, rt->io); /* on + wr-enable + data low */
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outb_p(128+64+16+8+2+1, rt->io); /* clock */
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}
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sleep_delay(1000);
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}
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static void send_1_byte(struct rtrack *rt)
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{
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if (rt->curvol == 0 || rt->muted) {
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outb_p(128+64+16+4 +1, rt->io); /* wr-enable+data high */
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outb_p(128+64+16+4+2+1, rt->io); /* clock */
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}
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else {
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outb_p(128+64+16+8+4 +1, rt->io); /* on+wr-enable+data high */
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outb_p(128+64+16+8+4+2+1, rt->io); /* clock */
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}
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sleep_delay(1000);
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}
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static int rt_setfreq(struct rtrack *rt, unsigned long freq)
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{
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int i;
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mutex_lock(&rt->lock); /* Stop other ops interfering */
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rt->curfreq = freq;
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/* now uses VIDEO_TUNER_LOW for fine tuning */
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freq += 171200; /* Add 10.7 MHz IF */
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freq /= 800; /* Convert to 50 kHz units */
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send_0_byte(rt); /* 0: LSB of frequency */
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for (i = 0; i < 13; i++) /* : frequency bits (1-13) */
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if (freq & (1 << i))
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send_1_byte(rt);
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else
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send_0_byte(rt);
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send_0_byte(rt); /* 14: test bit - always 0 */
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send_0_byte(rt); /* 15: test bit - always 0 */
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send_0_byte(rt); /* 16: band data 0 - always 0 */
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send_0_byte(rt); /* 17: band data 1 - always 0 */
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send_0_byte(rt); /* 18: band data 2 - always 0 */
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send_0_byte(rt); /* 19: time base - always 0 */
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send_0_byte(rt); /* 20: spacing (0 = 25 kHz) */
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send_1_byte(rt); /* 21: spacing (1 = 25 kHz) */
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send_0_byte(rt); /* 22: spacing (0 = 25 kHz) */
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send_1_byte(rt); /* 23: AM/FM (FM = 1, always) */
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if (rt->curvol == 0 || rt->muted)
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outb(0xd0, rt->io); /* volume steady + sigstr */
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else
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outb(0xd8, rt->io); /* volume steady + sigstr + on */
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mutex_unlock(&rt->lock);
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return 0;
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}
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static int rt_getsigstr(struct rtrack *rt)
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{
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int sig = 1;
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mutex_lock(&rt->lock);
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if (inb(rt->io) & 2) /* bit set = no signal present */
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sig = 0;
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mutex_unlock(&rt->lock);
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return sig;
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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-aimslab", sizeof(v->driver));
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strlcpy(v->card, "RadioTrack", 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 rtrack *rt = 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 * rt_getsigstr(rt);
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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 rtrack *rt = video_drvdata(file);
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rt_setfreq(rt, 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 rtrack *rt = video_drvdata(file);
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f->type = V4L2_TUNER_RADIO;
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f->frequency = rt->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 rtrack *rt = 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 = rt->muted;
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return 0;
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case V4L2_CID_AUDIO_VOLUME:
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ctrl->value = rt->curvol;
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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 rtrack *rt = 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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rt_mute(rt);
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else
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rt_setvol(rt, rt->curvol);
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return 0;
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case V4L2_CID_AUDIO_VOLUME:
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rt_setvol(rt, 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 rtrack_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 rtrack_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 rtrack_init(void)
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{
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struct rtrack *rt = &rtrack_card;
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struct v4l2_device *v4l2_dev = &rt->v4l2_dev;
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int res;
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strlcpy(v4l2_dev->name, "rtrack", sizeof(v4l2_dev->name));
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rt->io = io;
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if (rt->io == -1) {
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v4l2_err(v4l2_dev, "you must set an I/O address with io=0x20f or 0x30f\n");
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return -EINVAL;
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}
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if (!request_region(rt->io, 2, "rtrack")) {
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v4l2_err(v4l2_dev, "port 0x%x already in use\n", rt->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(rt->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(rt->vdev.name, v4l2_dev->name, sizeof(rt->vdev.name));
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rt->vdev.v4l2_dev = v4l2_dev;
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rt->vdev.fops = &rtrack_fops;
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rt->vdev.ioctl_ops = &rtrack_ioctl_ops;
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rt->vdev.release = video_device_release_empty;
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video_set_drvdata(&rt->vdev, rt);
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if (video_register_device(&rt->vdev, VFL_TYPE_RADIO, radio_nr) < 0) {
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v4l2_device_unregister(&rt->v4l2_dev);
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release_region(rt->io, 2);
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return -EINVAL;
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}
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v4l2_info(v4l2_dev, "AIMSlab RadioTrack/RadioReveal card driver.\n");
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/* Set up the I/O locking */
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mutex_init(&rt->lock);
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/* mute card - prevents noisy bootups */
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/* this ensures that the volume is all the way down */
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outb(0x48, rt->io); /* volume down but still "on" */
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sleep_delay(2000000); /* make sure it's totally down */
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outb(0xc0, rt->io); /* steady volume, mute card */
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return 0;
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}
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static void __exit rtrack_exit(void)
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{
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struct rtrack *rt = &rtrack_card;
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video_unregister_device(&rt->vdev);
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v4l2_device_unregister(&rt->v4l2_dev);
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release_region(rt->io, 2);
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}
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module_init(rtrack_init);
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module_exit(rtrack_exit);
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