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