| 1 | /* $NetBSD: cx24227.c,v 1.7 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: cx24227.c,v 1.7 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/module.h> |
| 37 | |
| 38 | #include <dev/i2c/cx24227var.h> |
| 39 | |
| 40 | /* #define CX24227_DEBUG */ |
| 41 | |
| 42 | struct cx24227 { |
| 43 | device_t parent; |
| 44 | i2c_tag_t tag; |
| 45 | i2c_addr_t addr; |
| 46 | }; |
| 47 | |
| 48 | static int cx24227_writereg(struct cx24227 *, uint8_t, uint16_t); |
| 49 | static int cx24227_readreg(struct cx24227 *, uint8_t, uint16_t *); |
| 50 | |
| 51 | static int cx24227_init(struct cx24227 *); |
| 52 | |
| 53 | static struct documentation_wanted { |
| 54 | uint8_t r; |
| 55 | uint16_t v; |
| 56 | } documentation_wanted[] = { |
| 57 | { 0x00, 0x0071, }, |
| 58 | { 0x01, 0x3213, }, |
| 59 | { 0x09, 0x0025, }, |
| 60 | { 0x1c, 0x001d, }, |
| 61 | { 0x1f, 0x002d, }, |
| 62 | { 0x20, 0x001d, }, |
| 63 | { 0x22, 0x0022, }, |
| 64 | { 0x23, 0x0020, }, |
| 65 | { 0x29, 0x110f, }, |
| 66 | { 0x2a, 0x10b4, }, |
| 67 | { 0x2b, 0x10ae, }, |
| 68 | { 0x2c, 0x0031, }, |
| 69 | { 0x31, 0x010d, }, |
| 70 | { 0x32, 0x0100, }, |
| 71 | { 0x44, 0x0510, }, |
| 72 | { 0x54, 0x0104, }, |
| 73 | { 0x58, 0x2222, }, |
| 74 | { 0x59, 0x1162, }, |
| 75 | { 0x5a, 0x3211, }, |
| 76 | { 0x5d, 0x0370, }, |
| 77 | { 0x5e, 0x0296, }, |
| 78 | { 0x61, 0x0010, }, |
| 79 | { 0x63, 0x4a00, }, |
| 80 | { 0x65, 0x0800, }, |
| 81 | { 0x71, 0x0003, }, |
| 82 | { 0x72, 0x0470, }, |
| 83 | { 0x81, 0x0002, }, |
| 84 | { 0x82, 0x0600, }, |
| 85 | { 0x86, 0x0002, }, |
| 86 | { 0x8a, 0x2c38, }, |
| 87 | { 0x8b, 0x2a37, }, |
| 88 | { 0x92, 0x302f, }, |
| 89 | { 0x93, 0x3332, }, |
| 90 | { 0x96, 0x000c, }, |
| 91 | { 0x99, 0x0101, }, |
| 92 | { 0x9c, 0x2e37, }, |
| 93 | { 0x9d, 0x2c37, }, |
| 94 | { 0x9e, 0x2c37, }, |
| 95 | { 0xab, 0x0100, }, |
| 96 | { 0xac, 0x1003, }, |
| 97 | { 0xad, 0x103f, }, |
| 98 | { 0xe2, 0x0100, }, |
| 99 | { 0xe3, 0x1000, }, |
| 100 | { 0x28, 0x1010, }, |
| 101 | { 0xb1, 0x000e, }, |
| 102 | }; |
| 103 | |
| 104 | |
| 105 | static int |
| 106 | cx24227_writereg(struct cx24227 *sc, uint8_t reg, uint16_t data) |
| 107 | { |
| 108 | int error; |
| 109 | uint8_t r[3]; |
| 110 | |
| 111 | if (iic_acquire_bus(sc->tag, I2C_F_POLL) != 0) |
| 112 | return false; |
| 113 | |
| 114 | r[0] = reg; |
| 115 | r[1] = (data >> 8) & 0xff; |
| 116 | r[2] = data & 0xff; |
| 117 | error = iic_exec(sc->tag, I2C_OP_WRITE_WITH_STOP, sc->addr, |
| 118 | r, 3, NULL, 0, I2C_F_POLL); |
| 119 | |
| 120 | iic_release_bus(sc->tag, I2C_F_POLL); |
| 121 | |
| 122 | return error; |
| 123 | } |
| 124 | |
| 125 | static int |
| 126 | cx24227_readreg(struct cx24227 *sc, uint8_t reg, uint16_t *data) |
| 127 | { |
| 128 | int error; |
| 129 | uint8_t r[2]; |
| 130 | |
| 131 | *data = 0x0000; |
| 132 | |
| 133 | if (iic_acquire_bus(sc->tag, I2C_F_POLL) != 0) |
| 134 | return -1; |
| 135 | |
| 136 | error = iic_exec(sc->tag, I2C_OP_READ_WITH_STOP, sc->addr, |
| 137 | ®, 1, r, 2, I2C_F_POLL); |
| 138 | |
| 139 | iic_release_bus(sc->tag, I2C_F_POLL); |
| 140 | |
| 141 | *data |= r[0] << 8; |
| 142 | *data |= r[1]; |
| 143 | |
| 144 | return error; |
| 145 | } |
| 146 | |
| 147 | uint16_t |
| 148 | cx24227_get_signal(struct cx24227 *sc) |
| 149 | { |
| 150 | uint16_t sig = 0; |
| 151 | |
| 152 | cx24227_readreg(sc, 0xf1, &sig); |
| 153 | |
| 154 | return sig; |
| 155 | } |
| 156 | |
| 157 | fe_status_t |
| 158 | cx24227_get_dtv_status(struct cx24227 *sc) |
| 159 | { |
| 160 | uint16_t reg; |
| 161 | fe_status_t status = 0; |
| 162 | |
| 163 | cx24227_readreg(sc, 0xf1, ®); |
| 164 | |
| 165 | if(reg & 0x1000) |
| 166 | status = FE_HAS_VITERBI | FE_HAS_CARRIER | FE_HAS_SIGNAL; |
| 167 | if(reg & 0x8000) |
| 168 | status |= FE_HAS_LOCK | FE_HAS_SYNC; |
| 169 | |
| 170 | return status; |
| 171 | } |
| 172 | |
| 173 | int |
| 174 | cx24227_set_modulation(struct cx24227 *sc, fe_modulation_t modulation) |
| 175 | { |
| 176 | switch (modulation) { |
| 177 | case VSB_8: |
| 178 | case QAM_64: |
| 179 | case QAM_256: |
| 180 | case QAM_AUTO: |
| 181 | break; |
| 182 | default: |
| 183 | return EINVAL; |
| 184 | } |
| 185 | |
| 186 | /* soft reset */ |
| 187 | cx24227_writereg(sc, 0xf5, 0x0000); |
| 188 | cx24227_writereg(sc, 0xf5, 0x0001); |
| 189 | |
| 190 | switch (modulation) { |
| 191 | case VSB_8: |
| 192 | /* VSB8 */ |
| 193 | cx24227_writereg(sc, 0xf4, 0x0000); |
| 194 | break; |
| 195 | default: |
| 196 | /* QAM */ |
| 197 | cx24227_writereg(sc, 0xf4, 0x0001); |
| 198 | cx24227_writereg(sc, 0x85, 0x0110); |
| 199 | break; |
| 200 | } |
| 201 | |
| 202 | /* soft reset */ |
| 203 | cx24227_writereg(sc, 0xf5, 0x0000); |
| 204 | cx24227_writereg(sc, 0xf5, 0x0001); |
| 205 | |
| 206 | #if 0 |
| 207 | delay(100); |
| 208 | |
| 209 | /* open the i2c gate */ |
| 210 | cx24227_writereg(sc, 0xf3, 0x0001); |
| 211 | |
| 212 | /* we could tune in here? */ |
| 213 | |
| 214 | /* close the i2c gate */ |
| 215 | cx24227_writereg(sc, 0xf3, 0x0000); |
| 216 | |
| 217 | #endif |
| 218 | return 0; |
| 219 | } |
| 220 | |
| 221 | void |
| 222 | cx24227_enable(struct cx24227* sc, bool enable) |
| 223 | { |
| 224 | if (enable == true) { |
| 225 | cx24227_init(sc); |
| 226 | } |
| 227 | } |
| 228 | |
| 229 | struct cx24227 * |
| 230 | cx24227_open(device_t parent, i2c_tag_t tag, i2c_addr_t addr) |
| 231 | { |
| 232 | struct cx24227 *sc; |
| 233 | int e; |
| 234 | uint16_t value; |
| 235 | |
| 236 | sc = kmem_alloc(sizeof(*sc), KM_SLEEP); |
| 237 | if (sc == NULL) |
| 238 | return NULL; |
| 239 | |
| 240 | sc->parent = parent; |
| 241 | sc->tag = tag; |
| 242 | sc->addr = addr; |
| 243 | |
| 244 | /* read chip ids */ |
| 245 | value = 0; |
| 246 | e = cx24227_readreg(sc, 0x04, &value); |
| 247 | if (e) { |
| 248 | device_printf(parent, "cx24227: read failed: %d\n" , e); |
| 249 | kmem_free(sc, sizeof(*sc)); |
| 250 | return NULL; |
| 251 | } |
| 252 | #ifdef CX24227_DEBUG |
| 253 | device_printf(parent, "cx24227: chipid %04x\n" , value); |
| 254 | #endif |
| 255 | |
| 256 | |
| 257 | value = 0x0001; /* open the i2c gate */ |
| 258 | e = cx24227_writereg(sc, 0xf3, value); |
| 259 | #if 0 |
| 260 | if (e) { |
| 261 | device_printf(parent, "cx24227: write failed: %d\n" , e); |
| 262 | kmem_free(sc, sizeof(*sc)); |
| 263 | return NULL; |
| 264 | } |
| 265 | #endif |
| 266 | |
| 267 | cx24227_init(sc); |
| 268 | |
| 269 | return sc; |
| 270 | } |
| 271 | |
| 272 | void |
| 273 | cx24227_close(struct cx24227 *sc) |
| 274 | { |
| 275 | kmem_free(sc, sizeof(*sc)); |
| 276 | } |
| 277 | |
| 278 | |
| 279 | static void |
| 280 | cx24227_sleepreset(struct cx24227 *sc) |
| 281 | { |
| 282 | cx24227_writereg(sc, 0xf2, 0); |
| 283 | cx24227_writereg(sc, 0xfa, 0); |
| 284 | } |
| 285 | |
| 286 | static int |
| 287 | cx24227_init(struct cx24227 *sc) |
| 288 | { |
| 289 | unsigned int i; |
| 290 | uint16_t reg; |
| 291 | |
| 292 | cx24227_sleepreset(sc); |
| 293 | |
| 294 | for(i = 0; i < __arraycount(documentation_wanted); i++) |
| 295 | cx24227_writereg(sc, documentation_wanted[i].r, documentation_wanted[i].v); |
| 296 | |
| 297 | /* Serial */ |
| 298 | cx24227_readreg(sc, 0xab, ®); |
| 299 | reg |= 0x0100; |
| 300 | cx24227_writereg(sc, 0xab, reg); |
| 301 | |
| 302 | /* no spectral inversion */ |
| 303 | cx24227_writereg(sc, 0x1b, 0x0110); |
| 304 | |
| 305 | /* 44MHz IF */ |
| 306 | cx24227_writereg(sc, 0x87, 0x01be); |
| 307 | cx24227_writereg(sc, 0x88, 0x0436); |
| 308 | cx24227_writereg(sc, 0x89, 0x054d); |
| 309 | |
| 310 | /* GPIO on */ |
| 311 | cx24227_readreg(sc, 0xe3, ®); |
| 312 | reg |= 0x1100; |
| 313 | cx24227_writereg(sc, 0xe3, reg); |
| 314 | |
| 315 | /* clocking */ |
| 316 | cx24227_readreg(sc, 0xac, ®); |
| 317 | reg &= ~0x3000; |
| 318 | reg |= 0x1000; |
| 319 | cx24227_writereg(sc, 0xac, reg); |
| 320 | |
| 321 | /* soft reset */ |
| 322 | cx24227_writereg(sc, 0xf5, 0x0000); |
| 323 | cx24227_writereg(sc, 0xf5, 0x0001); |
| 324 | |
| 325 | /* open gate */ |
| 326 | cx24227_writereg(sc, 0xf3, 0x0001); |
| 327 | |
| 328 | return 0; |
| 329 | } |
| 330 | |
| 331 | MODULE(MODULE_CLASS_DRIVER, cx24227, "i2cexec" ); |
| 332 | |
| 333 | static int |
| 334 | cx24227_modcmd(modcmd_t cmd, void *priv) |
| 335 | { |
| 336 | if (cmd == MODULE_CMD_INIT || cmd == MODULE_CMD_FINI) |
| 337 | return 0; |
| 338 | return ENOTTY; |
| 339 | } |
| 340 | |