1 // SPDX-License-Identifier: GPL-2.0-only 2 /* radio-trust.c - Trust FM Radio card driver for Linux 2.2 3 * 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 by 8 * Russell Kroll <rkroll@exploits.org>. Based on original tuner code by: 9 * 10 * Quay Ly 11 * Donald Song 12 * 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 <stdarg.h> 20 #include <linux/module.h> 21 #include <linux/init.h> 22 #include <linux/ioport.h> 23 #include <linux/videodev2.h> 24 #include <linux/io.h> 25 #include <linux/slab.h> 26 #include <media/v4l2-device.h> 27 #include <media/v4l2-ioctl.h> 28 #include "radio-isa.h" 29 30 MODULE_AUTHOR("Eric Lammerts, Russell Kroll, Quay Lu, Donald Song, Jason Lewis, Scott McGrath, William McGrath"); 31 MODULE_DESCRIPTION("A driver for the Trust FM Radio card."); 32 MODULE_LICENSE("GPL"); 33 MODULE_VERSION("0.1.99"); 34 35 /* acceptable ports: 0x350 (JP3 shorted), 0x358 (JP3 open) */ 36 37 #ifndef CONFIG_RADIO_TRUST_PORT 38 #define CONFIG_RADIO_TRUST_PORT -1 39 #endif 40 41 #define TRUST_MAX 2 42 43 static int io[TRUST_MAX] = { [0] = CONFIG_RADIO_TRUST_PORT, 44 [1 ... (TRUST_MAX - 1)] = -1 }; 45 static int radio_nr[TRUST_MAX] = { [0 ... (TRUST_MAX - 1)] = -1 }; 46 47 module_param_array(io, int, NULL, 0444); 48 MODULE_PARM_DESC(io, "I/O addresses of the Trust FM Radio card (0x350 or 0x358)"); 49 module_param_array(radio_nr, int, NULL, 0444); 50 MODULE_PARM_DESC(radio_nr, "Radio device numbers"); 51 52 struct trust { 53 struct radio_isa_card isa; 54 int ioval; 55 }; 56 57 static struct radio_isa_card *trust_alloc(void) 58 { 59 struct trust *tr = kzalloc(sizeof(*tr), GFP_KERNEL); 60 61 return tr ? &tr->isa : NULL; 62 } 63 64 /* i2c addresses */ 65 #define TDA7318_ADDR 0x88 66 #define TSA6060T_ADDR 0xc4 67 68 #define TR_DELAY do { inb(tr->isa.io); inb(tr->isa.io); inb(tr->isa.io); } while (0) 69 #define TR_SET_SCL outb(tr->ioval |= 2, tr->isa.io) 70 #define TR_CLR_SCL outb(tr->ioval &= 0xfd, tr->isa.io) 71 #define TR_SET_SDA outb(tr->ioval |= 1, tr->isa.io) 72 #define TR_CLR_SDA outb(tr->ioval &= 0xfe, tr->isa.io) 73 74 static void write_i2c(struct trust *tr, int n, ...) 75 { 76 unsigned char val, mask; 77 va_list args; 78 79 va_start(args, n); 80 81 /* start condition */ 82 TR_SET_SDA; 83 TR_SET_SCL; 84 TR_DELAY; 85 TR_CLR_SDA; 86 TR_CLR_SCL; 87 TR_DELAY; 88 89 for (; n; n--) { 90 val = va_arg(args, unsigned); 91 for (mask = 0x80; mask; mask >>= 1) { 92 if (val & mask) 93 TR_SET_SDA; 94 else 95 TR_CLR_SDA; 96 TR_SET_SCL; 97 TR_DELAY; 98 TR_CLR_SCL; 99 TR_DELAY; 100 } 101 /* acknowledge bit */ 102 TR_SET_SDA; 103 TR_SET_SCL; 104 TR_DELAY; 105 TR_CLR_SCL; 106 TR_DELAY; 107 } 108 109 /* stop condition */ 110 TR_CLR_SDA; 111 TR_DELAY; 112 TR_SET_SCL; 113 TR_DELAY; 114 TR_SET_SDA; 115 TR_DELAY; 116 117 va_end(args); 118 } 119 120 static int trust_s_mute_volume(struct radio_isa_card *isa, bool mute, int vol) 121 { 122 struct trust *tr = container_of(isa, struct trust, isa); 123 124 tr->ioval = (tr->ioval & 0xf7) | (mute << 3); 125 outb(tr->ioval, isa->io); 126 write_i2c(tr, 2, TDA7318_ADDR, vol ^ 0x1f); 127 return 0; 128 } 129 130 static int trust_s_stereo(struct radio_isa_card *isa, bool stereo) 131 { 132 struct trust *tr = container_of(isa, struct trust, isa); 133 134 tr->ioval = (tr->ioval & 0xfb) | (!stereo << 2); 135 outb(tr->ioval, isa->io); 136 return 0; 137 } 138 139 static u32 trust_g_signal(struct radio_isa_card *isa) 140 { 141 int i, v; 142 143 for (i = 0, v = 0; i < 100; i++) 144 v |= inb(isa->io); 145 return (v & 1) ? 0 : 0xffff; 146 } 147 148 static int trust_s_frequency(struct radio_isa_card *isa, u32 freq) 149 { 150 struct trust *tr = container_of(isa, struct trust, isa); 151 152 freq /= 160; /* Convert to 10 kHz units */ 153 freq += 1070; /* Add 10.7 MHz IF */ 154 write_i2c(tr, 5, TSA6060T_ADDR, (freq << 1) | 1, 155 freq >> 7, 0x60 | ((freq >> 15) & 1), 0); 156 return 0; 157 } 158 159 static int basstreble2chip[15] = { 160 0, 1, 2, 3, 4, 5, 6, 7, 14, 13, 12, 11, 10, 9, 8 161 }; 162 163 static int trust_s_ctrl(struct v4l2_ctrl *ctrl) 164 { 165 struct radio_isa_card *isa = 166 container_of(ctrl->handler, struct radio_isa_card, hdl); 167 struct trust *tr = container_of(isa, struct trust, isa); 168 169 switch (ctrl->id) { 170 case V4L2_CID_AUDIO_BASS: 171 write_i2c(tr, 2, TDA7318_ADDR, 0x60 | basstreble2chip[ctrl->val]); 172 return 0; 173 case V4L2_CID_AUDIO_TREBLE: 174 write_i2c(tr, 2, TDA7318_ADDR, 0x70 | basstreble2chip[ctrl->val]); 175 return 0; 176 } 177 return -EINVAL; 178 } 179 180 static const struct v4l2_ctrl_ops trust_ctrl_ops = { 181 .s_ctrl = trust_s_ctrl, 182 }; 183 184 static int trust_initialize(struct radio_isa_card *isa) 185 { 186 struct trust *tr = container_of(isa, struct trust, isa); 187 188 tr->ioval = 0xf; 189 write_i2c(tr, 2, TDA7318_ADDR, 0x80); /* speaker att. LF = 0 dB */ 190 write_i2c(tr, 2, TDA7318_ADDR, 0xa0); /* speaker att. RF = 0 dB */ 191 write_i2c(tr, 2, TDA7318_ADDR, 0xc0); /* speaker att. LR = 0 dB */ 192 write_i2c(tr, 2, TDA7318_ADDR, 0xe0); /* speaker att. RR = 0 dB */ 193 write_i2c(tr, 2, TDA7318_ADDR, 0x40); /* stereo 1 input, gain = 18.75 dB */ 194 195 v4l2_ctrl_new_std(&isa->hdl, &trust_ctrl_ops, 196 V4L2_CID_AUDIO_BASS, 0, 15, 1, 8); 197 v4l2_ctrl_new_std(&isa->hdl, &trust_ctrl_ops, 198 V4L2_CID_AUDIO_TREBLE, 0, 15, 1, 8); 199 return isa->hdl.error; 200 } 201 202 static const struct radio_isa_ops trust_ops = { 203 .init = trust_initialize, 204 .alloc = trust_alloc, 205 .s_mute_volume = trust_s_mute_volume, 206 .s_frequency = trust_s_frequency, 207 .s_stereo = trust_s_stereo, 208 .g_signal = trust_g_signal, 209 }; 210 211 static const int trust_ioports[] = { 0x350, 0x358 }; 212 213 static struct radio_isa_driver trust_driver = { 214 .driver = { 215 .match = radio_isa_match, 216 .probe = radio_isa_probe, 217 .remove = radio_isa_remove, 218 .driver = { 219 .name = "radio-trust", 220 }, 221 }, 222 .io_params = io, 223 .radio_nr_params = radio_nr, 224 .io_ports = trust_ioports, 225 .num_of_io_ports = ARRAY_SIZE(trust_ioports), 226 .region_size = 2, 227 .card = "Trust FM Radio", 228 .ops = &trust_ops, 229 .has_stereo = true, 230 .max_volume = 31, 231 }; 232 233 static int __init trust_init(void) 234 { 235 return isa_register_driver(&trust_driver.driver, TRUST_MAX); 236 } 237 238 static void __exit trust_exit(void) 239 { 240 isa_unregister_driver(&trust_driver.driver); 241 } 242 243 module_init(trust_init); 244 module_exit(trust_exit); 245