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1// SPDX-License-Identifier: GPL-2.0-only2/* radio-trust.c - Trust FM Radio card driver for Linux 2.23 * by Eric Lammerts <eric@scintilla.utwente.nl>4 *5 * Based on radio-aztech.c. Original notes:6 *7 * Adapted to support the Video for Linux API by8 * Russell Kroll <rkroll@exploits.org>. Based on original tuner code by:9 *10 * Quay Ly11 * Donald Song12 * Jason Lewis (jlewis@twilight.vtc.vsc.edu)13 * Scott McGrath (smcgrath@twilight.vtc.vsc.edu)14 * William McGrath (wmcgrath@twilight.vtc.vsc.edu)15 *16 * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@kernel.org>17 */18 19#include <linux/module.h>20#include <linux/init.h>21#include <linux/ioport.h>22#include <linux/videodev2.h>23#include <linux/io.h>24#include <linux/slab.h>25#include <media/v4l2-device.h>26#include <media/v4l2-ioctl.h>27#include "radio-isa.h"28 29MODULE_AUTHOR("Eric Lammerts, Russell Kroll, Quay Lu, Donald Song, Jason Lewis, Scott McGrath, William McGrath");30MODULE_DESCRIPTION("A driver for the Trust FM Radio card.");31MODULE_LICENSE("GPL");32MODULE_VERSION("0.1.99");33 34/* acceptable ports: 0x350 (JP3 shorted), 0x358 (JP3 open) */35 36#ifndef CONFIG_RADIO_TRUST_PORT37#define CONFIG_RADIO_TRUST_PORT -138#endif39 40#define TRUST_MAX 241 42static int io[TRUST_MAX] = { [0] = CONFIG_RADIO_TRUST_PORT,43 [1 ... (TRUST_MAX - 1)] = -1 };44static int radio_nr[TRUST_MAX] = { [0 ... (TRUST_MAX - 1)] = -1 };45 46module_param_array(io, int, NULL, 0444);47MODULE_PARM_DESC(io, "I/O addresses of the Trust FM Radio card (0x350 or 0x358)");48module_param_array(radio_nr, int, NULL, 0444);49MODULE_PARM_DESC(radio_nr, "Radio device numbers");50 51struct trust {52 struct radio_isa_card isa;53 int ioval;54};55 56static struct radio_isa_card *trust_alloc(void)57{58 struct trust *tr = kzalloc(sizeof(*tr), GFP_KERNEL);59 60 return tr ? &tr->isa : NULL;61}62 63/* i2c addresses */64#define TDA7318_ADDR 0x8865#define TSA6060T_ADDR 0xc466 67#define TR_DELAY do { inb(tr->isa.io); inb(tr->isa.io); inb(tr->isa.io); } while (0)68#define TR_SET_SCL outb(tr->ioval |= 2, tr->isa.io)69#define TR_CLR_SCL outb(tr->ioval &= 0xfd, tr->isa.io)70#define TR_SET_SDA outb(tr->ioval |= 1, tr->isa.io)71#define TR_CLR_SDA outb(tr->ioval &= 0xfe, tr->isa.io)72 73static void write_i2c(struct trust *tr, int n, ...)74{75 unsigned char val, mask;76 va_list args;77 78 va_start(args, n);79 80 /* start condition */81 TR_SET_SDA;82 TR_SET_SCL;83 TR_DELAY;84 TR_CLR_SDA;85 TR_CLR_SCL;86 TR_DELAY;87 88 for (; n; n--) {89 val = va_arg(args, unsigned);90 for (mask = 0x80; mask; mask >>= 1) {91 if (val & mask)92 TR_SET_SDA;93 else94 TR_CLR_SDA;95 TR_SET_SCL;96 TR_DELAY;97 TR_CLR_SCL;98 TR_DELAY;99 }100 /* acknowledge bit */101 TR_SET_SDA;102 TR_SET_SCL;103 TR_DELAY;104 TR_CLR_SCL;105 TR_DELAY;106 }107 108 /* stop condition */109 TR_CLR_SDA;110 TR_DELAY;111 TR_SET_SCL;112 TR_DELAY;113 TR_SET_SDA;114 TR_DELAY;115 116 va_end(args);117}118 119static int trust_s_mute_volume(struct radio_isa_card *isa, bool mute, int vol)120{121 struct trust *tr = container_of(isa, struct trust, isa);122 123 tr->ioval = (tr->ioval & 0xf7) | (mute << 3);124 outb(tr->ioval, isa->io);125 write_i2c(tr, 2, TDA7318_ADDR, vol ^ 0x1f);126 return 0;127}128 129static int trust_s_stereo(struct radio_isa_card *isa, bool stereo)130{131 struct trust *tr = container_of(isa, struct trust, isa);132 133 tr->ioval = (tr->ioval & 0xfb) | (!stereo << 2);134 outb(tr->ioval, isa->io);135 return 0;136}137 138static u32 trust_g_signal(struct radio_isa_card *isa)139{140 int i, v;141 142 for (i = 0, v = 0; i < 100; i++)143 v |= inb(isa->io);144 return (v & 1) ? 0 : 0xffff;145}146 147static int trust_s_frequency(struct radio_isa_card *isa, u32 freq)148{149 struct trust *tr = container_of(isa, struct trust, isa);150 151 freq /= 160; /* Convert to 10 kHz units */152 freq += 1070; /* Add 10.7 MHz IF */153 write_i2c(tr, 5, TSA6060T_ADDR, (freq << 1) | 1,154 freq >> 7, 0x60 | ((freq >> 15) & 1), 0);155 return 0;156}157 158static int basstreble2chip[15] = {159 0, 1, 2, 3, 4, 5, 6, 7, 14, 13, 12, 11, 10, 9, 8160};161 162static int trust_s_ctrl(struct v4l2_ctrl *ctrl)163{164 struct radio_isa_card *isa =165 container_of(ctrl->handler, struct radio_isa_card, hdl);166 struct trust *tr = container_of(isa, struct trust, isa);167 168 switch (ctrl->id) {169 case V4L2_CID_AUDIO_BASS:170 write_i2c(tr, 2, TDA7318_ADDR, 0x60 | basstreble2chip[ctrl->val]);171 return 0;172 case V4L2_CID_AUDIO_TREBLE:173 write_i2c(tr, 2, TDA7318_ADDR, 0x70 | basstreble2chip[ctrl->val]);174 return 0;175 }176 return -EINVAL;177}178 179static const struct v4l2_ctrl_ops trust_ctrl_ops = {180 .s_ctrl = trust_s_ctrl,181};182 183static int trust_initialize(struct radio_isa_card *isa)184{185 struct trust *tr = container_of(isa, struct trust, isa);186 187 tr->ioval = 0xf;188 write_i2c(tr, 2, TDA7318_ADDR, 0x80); /* speaker att. LF = 0 dB */189 write_i2c(tr, 2, TDA7318_ADDR, 0xa0); /* speaker att. RF = 0 dB */190 write_i2c(tr, 2, TDA7318_ADDR, 0xc0); /* speaker att. LR = 0 dB */191 write_i2c(tr, 2, TDA7318_ADDR, 0xe0); /* speaker att. RR = 0 dB */192 write_i2c(tr, 2, TDA7318_ADDR, 0x40); /* stereo 1 input, gain = 18.75 dB */193 194 v4l2_ctrl_new_std(&isa->hdl, &trust_ctrl_ops,195 V4L2_CID_AUDIO_BASS, 0, 15, 1, 8);196 v4l2_ctrl_new_std(&isa->hdl, &trust_ctrl_ops,197 V4L2_CID_AUDIO_TREBLE, 0, 15, 1, 8);198 return isa->hdl.error;199}200 201static const struct radio_isa_ops trust_ops = {202 .init = trust_initialize,203 .alloc = trust_alloc,204 .s_mute_volume = trust_s_mute_volume,205 .s_frequency = trust_s_frequency,206 .s_stereo = trust_s_stereo,207 .g_signal = trust_g_signal,208};209 210static const int trust_ioports[] = { 0x350, 0x358 };211 212static struct radio_isa_driver trust_driver = {213 .driver = {214 .match = radio_isa_match,215 .probe = radio_isa_probe,216 .remove = radio_isa_remove,217 .driver = {218 .name = "radio-trust",219 },220 },221 .io_params = io,222 .radio_nr_params = radio_nr,223 .io_ports = trust_ioports,224 .num_of_io_ports = ARRAY_SIZE(trust_ioports),225 .region_size = 2,226 .card = "Trust FM Radio",227 .ops = &trust_ops,228 .has_stereo = true,229 .max_volume = 31,230};231 232static int __init trust_init(void)233{234 return isa_register_driver(&trust_driver.driver, TRUST_MAX);235}236 237static void __exit trust_exit(void)238{239 isa_unregister_driver(&trust_driver.driver);240}241 242module_init(trust_init);243module_exit(trust_exit);244