244 lines
5.9 KiB
C
244 lines
5.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/* radio-trust.c - Trust FM Radio card driver for Linux 2.2
|
|
* by Eric Lammerts <eric@scintilla.utwente.nl>
|
|
*
|
|
* Based on radio-aztech.c. Original notes:
|
|
*
|
|
* Adapted to support the Video for Linux API by
|
|
* Russell Kroll <rkroll@exploits.org>. Based on original tuner code by:
|
|
*
|
|
* Quay Ly
|
|
* Donald Song
|
|
* Jason Lewis (jlewis@twilight.vtc.vsc.edu)
|
|
* Scott McGrath (smcgrath@twilight.vtc.vsc.edu)
|
|
* William McGrath (wmcgrath@twilight.vtc.vsc.edu)
|
|
*
|
|
* Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@kernel.org>
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/videodev2.h>
|
|
#include <linux/io.h>
|
|
#include <linux/slab.h>
|
|
#include <media/v4l2-device.h>
|
|
#include <media/v4l2-ioctl.h>
|
|
#include "radio-isa.h"
|
|
|
|
MODULE_AUTHOR("Eric Lammerts, Russell Kroll, Quay Lu, Donald Song, Jason Lewis, Scott McGrath, William McGrath");
|
|
MODULE_DESCRIPTION("A driver for the Trust FM Radio card.");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_VERSION("0.1.99");
|
|
|
|
/* acceptable ports: 0x350 (JP3 shorted), 0x358 (JP3 open) */
|
|
|
|
#ifndef CONFIG_RADIO_TRUST_PORT
|
|
#define CONFIG_RADIO_TRUST_PORT -1
|
|
#endif
|
|
|
|
#define TRUST_MAX 2
|
|
|
|
static int io[TRUST_MAX] = { [0] = CONFIG_RADIO_TRUST_PORT,
|
|
[1 ... (TRUST_MAX - 1)] = -1 };
|
|
static int radio_nr[TRUST_MAX] = { [0 ... (TRUST_MAX - 1)] = -1 };
|
|
|
|
module_param_array(io, int, NULL, 0444);
|
|
MODULE_PARM_DESC(io, "I/O addresses of the Trust FM Radio card (0x350 or 0x358)");
|
|
module_param_array(radio_nr, int, NULL, 0444);
|
|
MODULE_PARM_DESC(radio_nr, "Radio device numbers");
|
|
|
|
struct trust {
|
|
struct radio_isa_card isa;
|
|
int ioval;
|
|
};
|
|
|
|
static struct radio_isa_card *trust_alloc(void)
|
|
{
|
|
struct trust *tr = kzalloc(sizeof(*tr), GFP_KERNEL);
|
|
|
|
return tr ? &tr->isa : NULL;
|
|
}
|
|
|
|
/* i2c addresses */
|
|
#define TDA7318_ADDR 0x88
|
|
#define TSA6060T_ADDR 0xc4
|
|
|
|
#define TR_DELAY do { inb(tr->isa.io); inb(tr->isa.io); inb(tr->isa.io); } while (0)
|
|
#define TR_SET_SCL outb(tr->ioval |= 2, tr->isa.io)
|
|
#define TR_CLR_SCL outb(tr->ioval &= 0xfd, tr->isa.io)
|
|
#define TR_SET_SDA outb(tr->ioval |= 1, tr->isa.io)
|
|
#define TR_CLR_SDA outb(tr->ioval &= 0xfe, tr->isa.io)
|
|
|
|
static void write_i2c(struct trust *tr, int n, ...)
|
|
{
|
|
unsigned char val, mask;
|
|
va_list args;
|
|
|
|
va_start(args, n);
|
|
|
|
/* start condition */
|
|
TR_SET_SDA;
|
|
TR_SET_SCL;
|
|
TR_DELAY;
|
|
TR_CLR_SDA;
|
|
TR_CLR_SCL;
|
|
TR_DELAY;
|
|
|
|
for (; n; n--) {
|
|
val = va_arg(args, unsigned);
|
|
for (mask = 0x80; mask; mask >>= 1) {
|
|
if (val & mask)
|
|
TR_SET_SDA;
|
|
else
|
|
TR_CLR_SDA;
|
|
TR_SET_SCL;
|
|
TR_DELAY;
|
|
TR_CLR_SCL;
|
|
TR_DELAY;
|
|
}
|
|
/* acknowledge bit */
|
|
TR_SET_SDA;
|
|
TR_SET_SCL;
|
|
TR_DELAY;
|
|
TR_CLR_SCL;
|
|
TR_DELAY;
|
|
}
|
|
|
|
/* stop condition */
|
|
TR_CLR_SDA;
|
|
TR_DELAY;
|
|
TR_SET_SCL;
|
|
TR_DELAY;
|
|
TR_SET_SDA;
|
|
TR_DELAY;
|
|
|
|
va_end(args);
|
|
}
|
|
|
|
static int trust_s_mute_volume(struct radio_isa_card *isa, bool mute, int vol)
|
|
{
|
|
struct trust *tr = container_of(isa, struct trust, isa);
|
|
|
|
tr->ioval = (tr->ioval & 0xf7) | (mute << 3);
|
|
outb(tr->ioval, isa->io);
|
|
write_i2c(tr, 2, TDA7318_ADDR, vol ^ 0x1f);
|
|
return 0;
|
|
}
|
|
|
|
static int trust_s_stereo(struct radio_isa_card *isa, bool stereo)
|
|
{
|
|
struct trust *tr = container_of(isa, struct trust, isa);
|
|
|
|
tr->ioval = (tr->ioval & 0xfb) | (!stereo << 2);
|
|
outb(tr->ioval, isa->io);
|
|
return 0;
|
|
}
|
|
|
|
static u32 trust_g_signal(struct radio_isa_card *isa)
|
|
{
|
|
int i, v;
|
|
|
|
for (i = 0, v = 0; i < 100; i++)
|
|
v |= inb(isa->io);
|
|
return (v & 1) ? 0 : 0xffff;
|
|
}
|
|
|
|
static int trust_s_frequency(struct radio_isa_card *isa, u32 freq)
|
|
{
|
|
struct trust *tr = container_of(isa, struct trust, isa);
|
|
|
|
freq /= 160; /* Convert to 10 kHz units */
|
|
freq += 1070; /* Add 10.7 MHz IF */
|
|
write_i2c(tr, 5, TSA6060T_ADDR, (freq << 1) | 1,
|
|
freq >> 7, 0x60 | ((freq >> 15) & 1), 0);
|
|
return 0;
|
|
}
|
|
|
|
static int basstreble2chip[15] = {
|
|
0, 1, 2, 3, 4, 5, 6, 7, 14, 13, 12, 11, 10, 9, 8
|
|
};
|
|
|
|
static int trust_s_ctrl(struct v4l2_ctrl *ctrl)
|
|
{
|
|
struct radio_isa_card *isa =
|
|
container_of(ctrl->handler, struct radio_isa_card, hdl);
|
|
struct trust *tr = container_of(isa, struct trust, isa);
|
|
|
|
switch (ctrl->id) {
|
|
case V4L2_CID_AUDIO_BASS:
|
|
write_i2c(tr, 2, TDA7318_ADDR, 0x60 | basstreble2chip[ctrl->val]);
|
|
return 0;
|
|
case V4L2_CID_AUDIO_TREBLE:
|
|
write_i2c(tr, 2, TDA7318_ADDR, 0x70 | basstreble2chip[ctrl->val]);
|
|
return 0;
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
|
|
static const struct v4l2_ctrl_ops trust_ctrl_ops = {
|
|
.s_ctrl = trust_s_ctrl,
|
|
};
|
|
|
|
static int trust_initialize(struct radio_isa_card *isa)
|
|
{
|
|
struct trust *tr = container_of(isa, struct trust, isa);
|
|
|
|
tr->ioval = 0xf;
|
|
write_i2c(tr, 2, TDA7318_ADDR, 0x80); /* speaker att. LF = 0 dB */
|
|
write_i2c(tr, 2, TDA7318_ADDR, 0xa0); /* speaker att. RF = 0 dB */
|
|
write_i2c(tr, 2, TDA7318_ADDR, 0xc0); /* speaker att. LR = 0 dB */
|
|
write_i2c(tr, 2, TDA7318_ADDR, 0xe0); /* speaker att. RR = 0 dB */
|
|
write_i2c(tr, 2, TDA7318_ADDR, 0x40); /* stereo 1 input, gain = 18.75 dB */
|
|
|
|
v4l2_ctrl_new_std(&isa->hdl, &trust_ctrl_ops,
|
|
V4L2_CID_AUDIO_BASS, 0, 15, 1, 8);
|
|
v4l2_ctrl_new_std(&isa->hdl, &trust_ctrl_ops,
|
|
V4L2_CID_AUDIO_TREBLE, 0, 15, 1, 8);
|
|
return isa->hdl.error;
|
|
}
|
|
|
|
static const struct radio_isa_ops trust_ops = {
|
|
.init = trust_initialize,
|
|
.alloc = trust_alloc,
|
|
.s_mute_volume = trust_s_mute_volume,
|
|
.s_frequency = trust_s_frequency,
|
|
.s_stereo = trust_s_stereo,
|
|
.g_signal = trust_g_signal,
|
|
};
|
|
|
|
static const int trust_ioports[] = { 0x350, 0x358 };
|
|
|
|
static struct radio_isa_driver trust_driver = {
|
|
.driver = {
|
|
.match = radio_isa_match,
|
|
.probe = radio_isa_probe,
|
|
.remove = radio_isa_remove,
|
|
.driver = {
|
|
.name = "radio-trust",
|
|
},
|
|
},
|
|
.io_params = io,
|
|
.radio_nr_params = radio_nr,
|
|
.io_ports = trust_ioports,
|
|
.num_of_io_ports = ARRAY_SIZE(trust_ioports),
|
|
.region_size = 2,
|
|
.card = "Trust FM Radio",
|
|
.ops = &trust_ops,
|
|
.has_stereo = true,
|
|
.max_volume = 31,
|
|
};
|
|
|
|
static int __init trust_init(void)
|
|
{
|
|
return isa_register_driver(&trust_driver.driver, TRUST_MAX);
|
|
}
|
|
|
|
static void __exit trust_exit(void)
|
|
{
|
|
isa_unregister_driver(&trust_driver.driver);
|
|
}
|
|
|
|
module_init(trust_init);
|
|
module_exit(trust_exit);
|