mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-28 20:02:17 +00:00
![Hans Verkuil](/assets/img/avatar_default.png)
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Reported-by: Randy Dunlap <rdunlap@xenotime.net> Acked-by: Randy Dunlap <rdunlap@xenotime.net> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
210 lines
6.1 KiB
C
210 lines
6.1 KiB
C
/*
|
|
* AimsLab RadioTrack (aka RadioVeveal) driver
|
|
*
|
|
* Copyright 1997 M. Kirkwood
|
|
*
|
|
* Converted to the radio-isa framework by Hans Verkuil <hans.verkuil@cisco.com>
|
|
* Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
|
|
* Converted to new API by Alan Cox <alan@lxorguk.ukuu.org.uk>
|
|
* Various bugfixes and enhancements by Russell Kroll <rkroll@exploits.org>
|
|
*
|
|
* Notes on the hardware (reverse engineered from other peoples'
|
|
* reverse engineering of AIMS' code :-)
|
|
*
|
|
* Frequency control is done digitally -- ie out(port,encodefreq(95.8));
|
|
*
|
|
* The signal strength query is unsurprisingly inaccurate. And it seems
|
|
* to indicate that (on my card, at least) the frequency setting isn't
|
|
* too great. (I have to tune up .025MHz from what the freq should be
|
|
* to get a report that the thing is tuned.)
|
|
*
|
|
* Volume control is (ugh) analogue:
|
|
* out(port, start_increasing_volume);
|
|
* wait(a_wee_while);
|
|
* out(port, stop_changing_the_volume);
|
|
*
|
|
* Fully tested with the Keene USB FM Transmitter and the v4l2-compliance tool.
|
|
*/
|
|
|
|
#include <linux/module.h> /* Modules */
|
|
#include <linux/init.h> /* Initdata */
|
|
#include <linux/ioport.h> /* request_region */
|
|
#include <linux/delay.h> /* msleep */
|
|
#include <linux/videodev2.h> /* kernel radio structs */
|
|
#include <linux/io.h> /* outb, outb_p */
|
|
#include <linux/slab.h>
|
|
#include <media/v4l2-device.h>
|
|
#include <media/v4l2-ioctl.h>
|
|
#include <media/v4l2-ctrls.h>
|
|
#include "radio-isa.h"
|
|
|
|
MODULE_AUTHOR("M. Kirkwood");
|
|
MODULE_DESCRIPTION("A driver for the RadioTrack/RadioReveal radio card.");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_VERSION("1.0.0");
|
|
|
|
#ifndef CONFIG_RADIO_RTRACK_PORT
|
|
#define CONFIG_RADIO_RTRACK_PORT -1
|
|
#endif
|
|
|
|
#define RTRACK_MAX 2
|
|
|
|
static int io[RTRACK_MAX] = { [0] = CONFIG_RADIO_RTRACK_PORT,
|
|
[1 ... (RTRACK_MAX - 1)] = -1 };
|
|
static int radio_nr[RTRACK_MAX] = { [0 ... (RTRACK_MAX - 1)] = -1 };
|
|
|
|
module_param_array(io, int, NULL, 0444);
|
|
MODULE_PARM_DESC(io, "I/O addresses of the RadioTrack card (0x20f or 0x30f)");
|
|
module_param_array(radio_nr, int, NULL, 0444);
|
|
MODULE_PARM_DESC(radio_nr, "Radio device numbers");
|
|
|
|
struct rtrack {
|
|
struct radio_isa_card isa;
|
|
int curvol;
|
|
};
|
|
|
|
static struct radio_isa_card *rtrack_alloc(void)
|
|
{
|
|
struct rtrack *rt = kzalloc(sizeof(struct rtrack), GFP_KERNEL);
|
|
|
|
if (rt)
|
|
rt->curvol = 0xff;
|
|
return rt ? &rt->isa : NULL;
|
|
}
|
|
|
|
/* The 128+64 on these outb's is to keep the volume stable while tuning.
|
|
* Without them, the volume _will_ creep up with each frequency change
|
|
* and bit 4 (+16) is to keep the signal strength meter enabled.
|
|
*/
|
|
|
|
static void send_0_byte(struct radio_isa_card *isa, int on)
|
|
{
|
|
outb_p(128+64+16+on+1, isa->io); /* wr-enable + data low */
|
|
outb_p(128+64+16+on+2+1, isa->io); /* clock */
|
|
msleep(1);
|
|
}
|
|
|
|
static void send_1_byte(struct radio_isa_card *isa, int on)
|
|
{
|
|
outb_p(128+64+16+on+4+1, isa->io); /* wr-enable+data high */
|
|
outb_p(128+64+16+on+4+2+1, isa->io); /* clock */
|
|
msleep(1);
|
|
}
|
|
|
|
static int rtrack_s_frequency(struct radio_isa_card *isa, u32 freq)
|
|
{
|
|
int on = v4l2_ctrl_g_ctrl(isa->mute) ? 0 : 8;
|
|
int i;
|
|
|
|
freq += 171200; /* Add 10.7 MHz IF */
|
|
freq /= 800; /* Convert to 50 kHz units */
|
|
|
|
send_0_byte(isa, on); /* 0: LSB of frequency */
|
|
|
|
for (i = 0; i < 13; i++) /* : frequency bits (1-13) */
|
|
if (freq & (1 << i))
|
|
send_1_byte(isa, on);
|
|
else
|
|
send_0_byte(isa, on);
|
|
|
|
send_0_byte(isa, on); /* 14: test bit - always 0 */
|
|
send_0_byte(isa, on); /* 15: test bit - always 0 */
|
|
|
|
send_0_byte(isa, on); /* 16: band data 0 - always 0 */
|
|
send_0_byte(isa, on); /* 17: band data 1 - always 0 */
|
|
send_0_byte(isa, on); /* 18: band data 2 - always 0 */
|
|
send_0_byte(isa, on); /* 19: time base - always 0 */
|
|
|
|
send_0_byte(isa, on); /* 20: spacing (0 = 25 kHz) */
|
|
send_1_byte(isa, on); /* 21: spacing (1 = 25 kHz) */
|
|
send_0_byte(isa, on); /* 22: spacing (0 = 25 kHz) */
|
|
send_1_byte(isa, on); /* 23: AM/FM (FM = 1, always) */
|
|
|
|
outb(0xd0 + on, isa->io); /* volume steady + sigstr */
|
|
return 0;
|
|
}
|
|
|
|
static u32 rtrack_g_signal(struct radio_isa_card *isa)
|
|
{
|
|
/* bit set = no signal present */
|
|
return 0xffff * !(inb(isa->io) & 2);
|
|
}
|
|
|
|
static int rtrack_s_mute_volume(struct radio_isa_card *isa, bool mute, int vol)
|
|
{
|
|
struct rtrack *rt = container_of(isa, struct rtrack, isa);
|
|
int curvol = rt->curvol;
|
|
|
|
if (mute) {
|
|
outb(0xd0, isa->io); /* volume steady + sigstr + off */
|
|
return 0;
|
|
}
|
|
if (vol == 0) { /* volume = 0 means mute the card */
|
|
outb(0x48, isa->io); /* volume down but still "on" */
|
|
msleep(curvol * 3); /* make sure it's totally down */
|
|
} else if (curvol < vol) {
|
|
outb(0x98, isa->io); /* volume up + sigstr + on */
|
|
for (; curvol < vol; curvol++)
|
|
udelay(3000);
|
|
} else if (curvol > vol) {
|
|
outb(0x58, isa->io); /* volume down + sigstr + on */
|
|
for (; curvol > vol; curvol--)
|
|
udelay(3000);
|
|
}
|
|
outb(0xd8, isa->io); /* volume steady + sigstr + on */
|
|
rt->curvol = vol;
|
|
return 0;
|
|
}
|
|
|
|
/* Mute card - prevents noisy bootups */
|
|
static int rtrack_initialize(struct radio_isa_card *isa)
|
|
{
|
|
/* this ensures that the volume is all the way up */
|
|
outb(0x90, isa->io); /* volume up but still "on" */
|
|
msleep(3000); /* make sure it's totally up */
|
|
outb(0xc0, isa->io); /* steady volume, mute card */
|
|
return 0;
|
|
}
|
|
|
|
static const struct radio_isa_ops rtrack_ops = {
|
|
.alloc = rtrack_alloc,
|
|
.init = rtrack_initialize,
|
|
.s_mute_volume = rtrack_s_mute_volume,
|
|
.s_frequency = rtrack_s_frequency,
|
|
.g_signal = rtrack_g_signal,
|
|
};
|
|
|
|
static const int rtrack_ioports[] = { 0x20f, 0x30f };
|
|
|
|
static struct radio_isa_driver rtrack_driver = {
|
|
.driver = {
|
|
.match = radio_isa_match,
|
|
.probe = radio_isa_probe,
|
|
.remove = radio_isa_remove,
|
|
.driver = {
|
|
.name = "radio-aimslab",
|
|
},
|
|
},
|
|
.io_params = io,
|
|
.radio_nr_params = radio_nr,
|
|
.io_ports = rtrack_ioports,
|
|
.num_of_io_ports = ARRAY_SIZE(rtrack_ioports),
|
|
.region_size = 2,
|
|
.card = "AIMSlab RadioTrack/RadioReveal",
|
|
.ops = &rtrack_ops,
|
|
.has_stereo = true,
|
|
.max_volume = 0xff,
|
|
};
|
|
|
|
static int __init rtrack_init(void)
|
|
{
|
|
return isa_register_driver(&rtrack_driver.driver, RTRACK_MAX);
|
|
}
|
|
|
|
static void __exit rtrack_exit(void)
|
|
{
|
|
isa_unregister_driver(&rtrack_driver.driver);
|
|
}
|
|
|
|
module_init(rtrack_init);
|
|
module_exit(rtrack_exit);
|