1 /* radio-trust.c - Trust FM Radio card driver for Linux 2.2 2 * by Eric Lammerts <eric@scintilla.utwente.nl> 3 * 4 * Based on radio-aztech.c. Original notes: 5 * 6 * Adapted to support the Video for Linux API by 7 * Russell Kroll <rkroll@exploits.org>. Based on original tuner code by: 8 * 9 * Quay Ly 10 * Donald Song 11 * Jason Lewis (jlewis@twilight.vtc.vsc.edu) 12 * Scott McGrath (smcgrath@twilight.vtc.vsc.edu) 13 * William McGrath (wmcgrath@twilight.vtc.vsc.edu) 14 * 15 * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@kernel.org> 16 */ 17 18 #include <stdarg.h> 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 29 MODULE_AUTHOR("Eric Lammerts, Russell Kroll, Quay Lu, Donald Song, Jason Lewis, Scott McGrath, William McGrath"); 30 MODULE_DESCRIPTION("A driver for the Trust FM Radio card."); 31 MODULE_LICENSE("GPL"); 32 MODULE_VERSION("0.1.99"); 33 34 /* acceptable ports: 0x350 (JP3 shorted), 0x358 (JP3 open) */ 35 36 #ifndef CONFIG_RADIO_TRUST_PORT 37 #define CONFIG_RADIO_TRUST_PORT -1 38 #endif 39 40 #define TRUST_MAX 2 41 42 static int io[TRUST_MAX] = { [0] = CONFIG_RADIO_TRUST_PORT, 43 [1 ... (TRUST_MAX - 1)] = -1 }; 44 static int radio_nr[TRUST_MAX] = { [0 ... (TRUST_MAX - 1)] = -1 }; 45 46 module_param_array(io, int, NULL, 0444); 47 MODULE_PARM_DESC(io, "I/O addresses of the Trust FM Radio card (0x350 or 0x358)"); 48 module_param_array(radio_nr, int, NULL, 0444); 49 MODULE_PARM_DESC(radio_nr, "Radio device numbers"); 50 51 struct trust { 52 struct radio_isa_card isa; 53 int ioval; 54 }; 55 56 static 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 0x88 65 #define TSA6060T_ADDR 0xc4 66 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 73 static 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 else 94 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 } 118 119 static 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 } 128 129 static 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 } 137 138 static 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 } 146 147 static 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 } 157 158 static int basstreble2chip[15] = { 159 0, 1, 2, 3, 4, 5, 6, 7, 14, 13, 12, 11, 10, 9, 8 160 }; 161 162 static 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 } 178 179 static const struct v4l2_ctrl_ops trust_ctrl_ops = { 180 .s_ctrl = trust_s_ctrl, 181 }; 182 183 static 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 } 200 201 static 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 }; 209 210 static const int trust_ioports[] = { 0x350, 0x358 }; 211 212 static 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 }; 231 232 static int __init trust_init(void) 233 { 234 return isa_register_driver(&trust_driver.driver, TRUST_MAX); 235 } 236 237 static void __exit trust_exit(void) 238 { 239 isa_unregister_driver(&trust_driver.driver); 240 } 241 242 module_init(trust_init); 243 module_exit(trust_exit); 244