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// 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 <stdarg.h>
#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);
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