249 lines
6.3 KiB
C
249 lines
6.3 KiB
C
/*
|
|
* Zoltrix Radio Plus driver
|
|
* Copyright 1998 C. van Schaik <carl@leg.uct.ac.za>
|
|
*
|
|
* BUGS
|
|
* Due to the inconsistency in reading from the signal flags
|
|
* it is difficult to get an accurate tuned signal.
|
|
*
|
|
* It seems that the card is not linear to 0 volume. It cuts off
|
|
* at a low volume, and it is not possible (at least I have not found)
|
|
* to get fine volume control over the low volume range.
|
|
*
|
|
* Some code derived from code by Romolo Manfredini
|
|
* romolo@bicnet.it
|
|
*
|
|
* 1999-05-06 - (C. van Schaik)
|
|
* - Make signal strength and stereo scans
|
|
* kinder to cpu while in delay
|
|
* 1999-01-05 - (C. van Schaik)
|
|
* - Changed tuning to 1/160Mhz accuracy
|
|
* - Added stereo support
|
|
* (card defaults to stereo)
|
|
* (can explicitly force mono on the card)
|
|
* (can detect if station is in stereo)
|
|
* - Added unmute function
|
|
* - Reworked ioctl functions
|
|
* 2002-07-15 - Fix Stereo typo
|
|
*
|
|
* 2006-07-24 - Converted to V4L2 API
|
|
* by Mauro Carvalho Chehab <mchehab@infradead.org>
|
|
*
|
|
* Converted to the radio-isa framework by Hans Verkuil <hans.verkuil@cisco.com>
|
|
*
|
|
* Note that this is the driver for the Zoltrix Radio Plus.
|
|
* This driver does not work for the Zoltrix Radio Plus 108 or the
|
|
* Zoltrix Radio Plus for Windows.
|
|
*
|
|
* 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> /* udelay, msleep */
|
|
#include <linux/videodev2.h> /* kernel radio structs */
|
|
#include <linux/mutex.h>
|
|
#include <linux/io.h> /* outb, outb_p */
|
|
#include <linux/slab.h>
|
|
#include <media/v4l2-device.h>
|
|
#include <media/v4l2-ioctl.h>
|
|
#include "radio-isa.h"
|
|
|
|
MODULE_AUTHOR("C. van Schaik");
|
|
MODULE_DESCRIPTION("A driver for the Zoltrix Radio Plus.");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_VERSION("0.1.99");
|
|
|
|
#ifndef CONFIG_RADIO_ZOLTRIX_PORT
|
|
#define CONFIG_RADIO_ZOLTRIX_PORT -1
|
|
#endif
|
|
|
|
#define ZOLTRIX_MAX 2
|
|
|
|
static int io[ZOLTRIX_MAX] = { [0] = CONFIG_RADIO_ZOLTRIX_PORT,
|
|
[1 ... (ZOLTRIX_MAX - 1)] = -1 };
|
|
static int radio_nr[ZOLTRIX_MAX] = { [0 ... (ZOLTRIX_MAX - 1)] = -1 };
|
|
|
|
module_param_array(io, int, NULL, 0444);
|
|
MODULE_PARM_DESC(io, "I/O addresses of the Zoltrix Radio Plus card (0x20c or 0x30c)");
|
|
module_param_array(radio_nr, int, NULL, 0444);
|
|
MODULE_PARM_DESC(radio_nr, "Radio device numbers");
|
|
|
|
struct zoltrix {
|
|
struct radio_isa_card isa;
|
|
int curvol;
|
|
bool muted;
|
|
};
|
|
|
|
static struct radio_isa_card *zoltrix_alloc(void)
|
|
{
|
|
struct zoltrix *zol = kzalloc(sizeof(*zol), GFP_KERNEL);
|
|
|
|
return zol ? &zol->isa : NULL;
|
|
}
|
|
|
|
static int zoltrix_s_mute_volume(struct radio_isa_card *isa, bool mute, int vol)
|
|
{
|
|
struct zoltrix *zol = container_of(isa, struct zoltrix, isa);
|
|
|
|
zol->curvol = vol;
|
|
zol->muted = mute;
|
|
if (mute || vol == 0) {
|
|
outb(0, isa->io);
|
|
outb(0, isa->io);
|
|
inb(isa->io + 3); /* Zoltrix needs to be read to confirm */
|
|
return 0;
|
|
}
|
|
|
|
outb(vol - 1, isa->io);
|
|
msleep(10);
|
|
inb(isa->io + 2);
|
|
return 0;
|
|
}
|
|
|
|
/* tunes the radio to the desired frequency */
|
|
static int zoltrix_s_frequency(struct radio_isa_card *isa, u32 freq)
|
|
{
|
|
struct zoltrix *zol = container_of(isa, struct zoltrix, isa);
|
|
struct v4l2_device *v4l2_dev = &isa->v4l2_dev;
|
|
unsigned long long bitmask, f, m;
|
|
bool stereo = isa->stereo;
|
|
int i;
|
|
|
|
if (freq == 0) {
|
|
v4l2_warn(v4l2_dev, "cannot set a frequency of 0.\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
m = (freq / 160 - 8800) * 2;
|
|
f = (unsigned long long)m + 0x4d1c;
|
|
|
|
bitmask = 0xc480402c10080000ull;
|
|
i = 45;
|
|
|
|
outb(0, isa->io);
|
|
outb(0, isa->io);
|
|
inb(isa->io + 3); /* Zoltrix needs to be read to confirm */
|
|
|
|
outb(0x40, isa->io);
|
|
outb(0xc0, isa->io);
|
|
|
|
bitmask = (bitmask ^ ((f & 0xff) << 47) ^ ((f & 0xff00) << 30) ^ (stereo << 31));
|
|
while (i--) {
|
|
if ((bitmask & 0x8000000000000000ull) != 0) {
|
|
outb(0x80, isa->io);
|
|
udelay(50);
|
|
outb(0x00, isa->io);
|
|
udelay(50);
|
|
outb(0x80, isa->io);
|
|
udelay(50);
|
|
} else {
|
|
outb(0xc0, isa->io);
|
|
udelay(50);
|
|
outb(0x40, isa->io);
|
|
udelay(50);
|
|
outb(0xc0, isa->io);
|
|
udelay(50);
|
|
}
|
|
bitmask *= 2;
|
|
}
|
|
/* termination sequence */
|
|
outb(0x80, isa->io);
|
|
outb(0xc0, isa->io);
|
|
outb(0x40, isa->io);
|
|
udelay(1000);
|
|
inb(isa->io + 2);
|
|
udelay(1000);
|
|
|
|
return zoltrix_s_mute_volume(isa, zol->muted, zol->curvol);
|
|
}
|
|
|
|
/* Get signal strength */
|
|
static u32 zoltrix_g_rxsubchans(struct radio_isa_card *isa)
|
|
{
|
|
struct zoltrix *zol = container_of(isa, struct zoltrix, isa);
|
|
int a, b;
|
|
|
|
outb(0x00, isa->io); /* This stuff I found to do nothing */
|
|
outb(zol->curvol, isa->io);
|
|
msleep(20);
|
|
|
|
a = inb(isa->io);
|
|
msleep(10);
|
|
b = inb(isa->io);
|
|
|
|
return (a == b && a == 0xcf) ?
|
|
V4L2_TUNER_SUB_STEREO : V4L2_TUNER_SUB_MONO;
|
|
}
|
|
|
|
static u32 zoltrix_g_signal(struct radio_isa_card *isa)
|
|
{
|
|
struct zoltrix *zol = container_of(isa, struct zoltrix, isa);
|
|
int a, b;
|
|
|
|
outb(0x00, isa->io); /* This stuff I found to do nothing */
|
|
outb(zol->curvol, isa->io);
|
|
msleep(20);
|
|
|
|
a = inb(isa->io);
|
|
msleep(10);
|
|
b = inb(isa->io);
|
|
|
|
if (a != b)
|
|
return 0;
|
|
|
|
/* I found this out by playing with a binary scanner on the card io */
|
|
return (a == 0xcf || a == 0xdf || a == 0xef) ? 0xffff : 0;
|
|
}
|
|
|
|
static int zoltrix_s_stereo(struct radio_isa_card *isa, bool stereo)
|
|
{
|
|
return zoltrix_s_frequency(isa, isa->freq);
|
|
}
|
|
|
|
static const struct radio_isa_ops zoltrix_ops = {
|
|
.alloc = zoltrix_alloc,
|
|
.s_mute_volume = zoltrix_s_mute_volume,
|
|
.s_frequency = zoltrix_s_frequency,
|
|
.s_stereo = zoltrix_s_stereo,
|
|
.g_rxsubchans = zoltrix_g_rxsubchans,
|
|
.g_signal = zoltrix_g_signal,
|
|
};
|
|
|
|
static const int zoltrix_ioports[] = { 0x20c, 0x30c };
|
|
|
|
static struct radio_isa_driver zoltrix_driver = {
|
|
.driver = {
|
|
.match = radio_isa_match,
|
|
.probe = radio_isa_probe,
|
|
.remove = radio_isa_remove,
|
|
.driver = {
|
|
.name = "radio-zoltrix",
|
|
},
|
|
},
|
|
.io_params = io,
|
|
.radio_nr_params = radio_nr,
|
|
.io_ports = zoltrix_ioports,
|
|
.num_of_io_ports = ARRAY_SIZE(zoltrix_ioports),
|
|
.region_size = 2,
|
|
.card = "Zoltrix Radio Plus",
|
|
.ops = &zoltrix_ops,
|
|
.has_stereo = true,
|
|
.max_volume = 15,
|
|
};
|
|
|
|
static int __init zoltrix_init(void)
|
|
{
|
|
return isa_register_driver(&zoltrix_driver.driver, ZOLTRIX_MAX);
|
|
}
|
|
|
|
static void __exit zoltrix_exit(void)
|
|
{
|
|
isa_unregister_driver(&zoltrix_driver.driver);
|
|
}
|
|
|
|
module_init(zoltrix_init);
|
|
module_exit(zoltrix_exit);
|
|
|