| 1 | /* $NetBSD: mt2131.c,v 1.5 2015/03/07 14:16:51 jmcneill Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright (c) 2008, 2011 Jonathan A. Kollasch |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * Redistribution and use in source and binary forms, with or without |
| 8 | * modification, are permitted provided that the following conditions |
| 9 | * are met: |
| 10 | * 1. Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
| 12 | * 2. Redistributions in binary form must reproduce the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer in the |
| 14 | * documentation and/or other materials provided with the distribution. |
| 15 | * |
| 16 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| 18 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 19 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR |
| 20 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| 21 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| 22 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
| 23 | * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| 24 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
| 25 | * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
| 26 | * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | */ |
| 28 | |
| 29 | #include <sys/cdefs.h> |
| 30 | __KERNEL_RCSID(0, "$NetBSD: mt2131.c,v 1.5 2015/03/07 14:16:51 jmcneill Exp $" ); |
| 31 | |
| 32 | #include <sys/param.h> |
| 33 | #include <sys/systm.h> |
| 34 | #include <sys/device.h> |
| 35 | #include <sys/kmem.h> |
| 36 | #include <sys/syslog.h> |
| 37 | #include <sys/proc.h> |
| 38 | #include <sys/module.h> |
| 39 | |
| 40 | #include <dev/i2c/mt2131var.h> |
| 41 | |
| 42 | #define PWR 0x07 |
| 43 | #define UPC_1 0x0b |
| 44 | #define AGC_RL 0x10 |
| 45 | #define MISC_2 0x15 |
| 46 | |
| 47 | #define IF1 1220 |
| 48 | #define IF2 44000 |
| 49 | #define REF 16000 |
| 50 | |
| 51 | static const uint8_t mt2131_initstring[] = { |
| 52 | 0x01, |
| 53 | 0x50, 0x00, 0x50, 0x80, 0x00, 0x49, |
| 54 | 0xfa, 0x88, 0x08, 0x77, 0x41, 0x04, 0x00, 0x00, 0x00, 0x32, |
| 55 | 0x7f, 0xda, 0x4c, 0x00, 0x10, 0xaa, 0x78, 0x80, 0xff, 0x68, |
| 56 | 0xa0, 0xff, 0xdd, 0x00, 0x00 |
| 57 | }; |
| 58 | |
| 59 | static const uint8_t mt2131_agcinitstring[] = { |
| 60 | AGC_RL, |
| 61 | 0x7f, 0xc8, 0x0a, 0x5f, 0x00, 0x04 |
| 62 | }; |
| 63 | |
| 64 | |
| 65 | struct mt2131_softc { |
| 66 | device_t parent; |
| 67 | i2c_tag_t tag; |
| 68 | i2c_addr_t addr; |
| 69 | uint32_t frequency; |
| 70 | uint32_t bandwidth; |
| 71 | }; |
| 72 | |
| 73 | static int mt2131_init(struct mt2131_softc *); |
| 74 | |
| 75 | static int mt2131_read(struct mt2131_softc *, uint8_t, uint8_t *); |
| 76 | static int mt2131_write(struct mt2131_softc *, uint8_t, uint8_t); |
| 77 | |
| 78 | struct mt2131_softc * |
| 79 | mt2131_open(device_t parent, i2c_tag_t t, i2c_addr_t a) |
| 80 | { |
| 81 | struct mt2131_softc *sc; |
| 82 | int ret; |
| 83 | uint8_t cmd, reg; |
| 84 | |
| 85 | cmd = reg = 0; |
| 86 | |
| 87 | /* get id reg */ |
| 88 | iic_acquire_bus(t, I2C_F_POLL); |
| 89 | ret = iic_exec(t, I2C_OP_READ_WITH_STOP, a, &cmd, 1, ®, 1, I2C_F_POLL); |
| 90 | iic_release_bus(t, I2C_F_POLL); |
| 91 | |
| 92 | if (ret) { |
| 93 | device_printf(parent, "%s(): read fail\n" , __func__); |
| 94 | return NULL; |
| 95 | } |
| 96 | |
| 97 | if ((reg & 0xfe) != 0x3e) { |
| 98 | device_printf(parent, "%s(): chip id %02x unknown\n" , |
| 99 | __func__, reg); |
| 100 | return NULL; |
| 101 | } |
| 102 | |
| 103 | sc = kmem_alloc(sizeof(*sc), KM_SLEEP); |
| 104 | if (sc == NULL) |
| 105 | return NULL; |
| 106 | |
| 107 | sc->parent = parent; |
| 108 | sc->tag = t; |
| 109 | sc->addr = a; |
| 110 | |
| 111 | mt2131_init(sc); |
| 112 | |
| 113 | return sc; |
| 114 | } |
| 115 | |
| 116 | void |
| 117 | mt2131_close(struct mt2131_softc *sc) |
| 118 | { |
| 119 | kmem_free(sc, sizeof(*sc)); |
| 120 | } |
| 121 | |
| 122 | int |
| 123 | mt2131_tune_dtv(struct mt2131_softc *sc, const struct dvb_frontend_parameters *p) |
| 124 | { |
| 125 | int rv, i; |
| 126 | uint64_t o1, o2; |
| 127 | uint64_t d1, d2; |
| 128 | uint32_t r1, r2; |
| 129 | uint32_t fr; |
| 130 | uint8_t b[7]; |
| 131 | uint8_t regval; |
| 132 | |
| 133 | mt2131_init(sc); |
| 134 | |
| 135 | b[0] = 0x01; |
| 136 | |
| 137 | if(p->frequency != 0 && |
| 138 | (p->frequency < 50000000 || p->frequency > 1000000000)) |
| 139 | return EINVAL; |
| 140 | |
| 141 | fr = p->frequency / 1000; |
| 142 | |
| 143 | o1 = fr + IF1 * 1000; |
| 144 | o2 = o1 - fr - IF2; |
| 145 | |
| 146 | d1 = (o1 * 8192)/REF; |
| 147 | d2 = (o2 * 8192)/REF; |
| 148 | |
| 149 | r1 = d1/8192; |
| 150 | r2 = d2/8192; |
| 151 | |
| 152 | b[1] = (d1 & 0x1fe0) >> 5; |
| 153 | b[2] = (d1 & 0x001f); |
| 154 | b[3] = r1; |
| 155 | b[4] = (d2 & 0x1fe0) >> 5; |
| 156 | b[5] = (d2 & 0x001f); |
| 157 | b[6] = r2; |
| 158 | |
| 159 | iic_acquire_bus(sc->tag, I2C_F_POLL); |
| 160 | rv = iic_exec(sc->tag, I2C_OP_WRITE_WITH_STOP, sc->addr, b, 7, NULL, 0, I2C_F_POLL); |
| 161 | iic_release_bus(sc->tag, I2C_F_POLL); |
| 162 | |
| 163 | regval = (fr - 27501) / 55000; |
| 164 | |
| 165 | if(regval > 0x13) |
| 166 | regval = 0x13; |
| 167 | |
| 168 | rv = mt2131_write(sc, UPC_1, regval); |
| 169 | |
| 170 | if (rv != 0) |
| 171 | device_printf(sc->parent, "%s write failed\n" , __func__); |
| 172 | |
| 173 | sc->frequency = (o1 - o2 - IF2) * 1000; |
| 174 | |
| 175 | for (i = 0; i < 100; i++) { |
| 176 | kpause("mt2131" , true, 1, NULL); |
| 177 | |
| 178 | rv = mt2131_read(sc, 0x08, ®val); |
| 179 | if (rv != 0) |
| 180 | device_printf(sc->parent, "%s read failed\n" , __func__); |
| 181 | |
| 182 | if (( regval & 0x88 ) == 0x88 ) { |
| 183 | return 0; |
| 184 | } |
| 185 | } |
| 186 | |
| 187 | device_printf(sc->parent, "mt2131 not locked, %02x\n" , b[1]); |
| 188 | |
| 189 | return rv; |
| 190 | } |
| 191 | |
| 192 | static int |
| 193 | mt2131_init(struct mt2131_softc *sc) |
| 194 | { |
| 195 | int ret; |
| 196 | |
| 197 | ret = iic_acquire_bus(sc->tag, I2C_F_POLL); |
| 198 | if (ret) |
| 199 | return -1; |
| 200 | ret = iic_exec(sc->tag, I2C_OP_WRITE_WITH_STOP, sc->addr, |
| 201 | mt2131_initstring, sizeof(mt2131_initstring), NULL, 0, I2C_F_POLL); |
| 202 | if (ret) |
| 203 | return -1; |
| 204 | iic_release_bus(sc->tag, I2C_F_POLL); |
| 205 | |
| 206 | ret = mt2131_write(sc, UPC_1, 0x09); |
| 207 | ret = mt2131_write(sc, MISC_2, 0x47); |
| 208 | ret = mt2131_write(sc, PWR, 0xf2); |
| 209 | ret = mt2131_write(sc, UPC_1, 0x01); |
| 210 | |
| 211 | ret = iic_acquire_bus(sc->tag, I2C_F_POLL); |
| 212 | if (ret) |
| 213 | return -1; |
| 214 | ret = iic_exec(sc->tag, I2C_OP_WRITE_WITH_STOP, sc->addr, |
| 215 | mt2131_agcinitstring, sizeof(mt2131_agcinitstring), |
| 216 | NULL, 0, I2C_F_POLL); |
| 217 | iic_release_bus(sc->tag, I2C_F_POLL); |
| 218 | if (ret) |
| 219 | return -1; |
| 220 | |
| 221 | return 0; |
| 222 | } |
| 223 | |
| 224 | static int |
| 225 | mt2131_read(struct mt2131_softc *sc, uint8_t r, uint8_t *v) |
| 226 | { |
| 227 | int ret; |
| 228 | |
| 229 | ret = iic_acquire_bus(sc->tag, I2C_F_POLL); |
| 230 | if (ret) |
| 231 | return ret; |
| 232 | ret = iic_exec(sc->tag, I2C_OP_READ_WITH_STOP, sc->addr, |
| 233 | &r, 1, v, 1, I2C_F_POLL); |
| 234 | |
| 235 | iic_release_bus(sc->tag, I2C_F_POLL); |
| 236 | |
| 237 | return ret; |
| 238 | } |
| 239 | |
| 240 | static int |
| 241 | mt2131_write(struct mt2131_softc *sc, uint8_t a, uint8_t v) |
| 242 | { |
| 243 | int ret; |
| 244 | uint8_t b[] = { a, v }; |
| 245 | |
| 246 | ret = iic_acquire_bus(sc->tag, I2C_F_POLL); |
| 247 | if (ret) |
| 248 | return ret; |
| 249 | |
| 250 | ret = iic_exec(sc->tag, I2C_OP_READ_WITH_STOP, sc->addr, |
| 251 | b, sizeof(b), NULL, 0, I2C_F_POLL); |
| 252 | |
| 253 | iic_release_bus(sc->tag, I2C_F_POLL); |
| 254 | |
| 255 | return ret; |
| 256 | } |
| 257 | |
| 258 | MODULE(MODULE_CLASS_DRIVER, mt2131, "i2cexec" ); |
| 259 | |
| 260 | static int |
| 261 | mt2131_modcmd(modcmd_t cmd, void *priv) |
| 262 | { |
| 263 | if (cmd == MODULE_CMD_INIT || cmd == MODULE_CMD_FINI) |
| 264 | return 0; |
| 265 | return ENOTTY; |
| 266 | } |
| 267 | |