// SPDX-License-Identifier: GPL-2.0-only /* radio-trust.c - Trust FM Radio card driver for Linux 2.2 * by Eric Lammerts * * Based on radio-aztech.c. Original notes: * * Adapted to support the Video for Linux API by * Russell Kroll . 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 */ #include #include #include #include #include #include #include #include #include #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);