nfsmb.c revision 1.6.2.6
1 /* $NetBSD: nfsmb.c,v 1.6.2.6 2008/01/21 09:44:07 yamt Exp $ */ 2 /* 3 * Copyright (c) 2007 KIYOHARA Takashi 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 18 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, 19 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 20 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 23 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 24 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 25 * POSSIBILITY OF SUCH DAMAGE. 26 * 27 */ 28 #include <sys/cdefs.h> 29 __KERNEL_RCSID(0, "$NetBSD: nfsmb.c,v 1.6.2.6 2008/01/21 09:44:07 yamt Exp $"); 30 31 #include <sys/param.h> 32 #include <sys/device.h> 33 #include <sys/errno.h> 34 #include <sys/kernel.h> 35 #include <sys/rwlock.h> 36 #include <sys/proc.h> 37 38 #include <sys/bus.h> 39 40 #include <dev/i2c/i2cvar.h> 41 42 #include <dev/pci/pcivar.h> 43 #include <dev/pci/pcireg.h> 44 #include <dev/pci/pcidevs.h> 45 46 #include <dev/pci/nfsmbreg.h> 47 48 49 struct nfsmbc_attach_args { 50 int nfsmb_num; 51 bus_space_tag_t nfsmb_iot; 52 int nfsmb_addr; 53 }; 54 55 struct nfsmb_softc; 56 struct nfsmbc_softc { 57 struct device sc_dev; 58 59 pci_chipset_tag_t sc_pc; 60 pcitag_t sc_tag; 61 struct pci_attach_args *sc_pa; 62 63 bus_space_tag_t sc_iot; 64 struct device *sc_nfsmb[2]; 65 }; 66 67 struct nfsmb_softc { 68 struct device sc_dev; 69 int sc_num; 70 struct device *sc_nfsmbc; 71 72 bus_space_tag_t sc_iot; 73 bus_space_handle_t sc_ioh; 74 75 struct i2c_controller sc_i2c; /* i2c controller info */ 76 krwlock_t sc_rwlock; 77 }; 78 79 80 static int nfsmbc_match(struct device *, struct cfdata *, void *); 81 static void nfsmbc_attach(struct device *, struct device *, void *); 82 static int nfsmbc_print(void *, const char *); 83 84 static int nfsmb_match(struct device *, struct cfdata *, void *); 85 static void nfsmb_attach(struct device *, struct device *, void *); 86 static int nfsmb_acquire_bus(void *, int); 87 static void nfsmb_release_bus(void *, int); 88 static int nfsmb_exec( 89 void *, i2c_op_t, i2c_addr_t, const void *, size_t, void *, size_t, int); 90 static int nfsmb_check_done(struct nfsmb_softc *); 91 static int 92 nfsmb_send_1(struct nfsmb_softc *, uint8_t, i2c_addr_t, i2c_op_t, int); 93 static int nfsmb_write_1( 94 struct nfsmb_softc *, uint8_t, uint8_t, i2c_addr_t, i2c_op_t, int); 95 static int nfsmb_write_2( 96 struct nfsmb_softc *, uint8_t, uint16_t, i2c_addr_t, i2c_op_t, int); 97 static int nfsmb_receive_1(struct nfsmb_softc *, i2c_addr_t, i2c_op_t, int); 98 static int 99 nfsmb_read_1(struct nfsmb_softc *, uint8_t, i2c_addr_t, i2c_op_t, int); 100 static int 101 nfsmb_read_2(struct nfsmb_softc *, uint8_t, i2c_addr_t, i2c_op_t, int); 102 103 104 CFATTACH_DECL(nfsmbc, sizeof(struct nfsmbc_softc), 105 nfsmbc_match, nfsmbc_attach, NULL, NULL); 106 107 static int 108 nfsmbc_match(struct device *parent, struct cfdata *match, void *aux) 109 { 110 struct pci_attach_args *pa = aux; 111 112 if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_NVIDIA) { 113 switch (PCI_PRODUCT(pa->pa_id)) { 114 case PCI_PRODUCT_NVIDIA_NFORCE2_SMBUS: 115 case PCI_PRODUCT_NVIDIA_NFORCE2_400_SMBUS: 116 case PCI_PRODUCT_NVIDIA_NFORCE3_SMBUS: 117 case PCI_PRODUCT_NVIDIA_NFORCE3_250_SMBUS: 118 case PCI_PRODUCT_NVIDIA_NFORCE4_SMBUS: 119 case PCI_PRODUCT_NVIDIA_NFORCE430_SMBUS: 120 case PCI_PRODUCT_NVIDIA_MCP04_SMBUS: 121 case PCI_PRODUCT_NVIDIA_MCP55_SMB: 122 case PCI_PRODUCT_NVIDIA_MCP61_SMB: 123 case PCI_PRODUCT_NVIDIA_MCP65_SMB: 124 case PCI_PRODUCT_NVIDIA_MCP67_SMB: 125 case PCI_PRODUCT_NVIDIA_MCP73_SMB: 126 return 1; 127 } 128 } 129 130 return 0; 131 } 132 133 static void 134 nfsmbc_attach(struct device *parent, struct device *self, void *aux) 135 { 136 struct nfsmbc_softc *sc = (struct nfsmbc_softc *) self; 137 struct pci_attach_args *pa = aux; 138 struct nfsmbc_attach_args nfsmbca; 139 pcireg_t reg; 140 int baseregs[2]; 141 char devinfo[256]; 142 143 aprint_naive("\n"); 144 pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo, sizeof(devinfo)); 145 aprint_normal(": %s (rev. 0x%02x)\n", devinfo, 146 PCI_REVISION(pa->pa_class)); 147 148 sc->sc_pc = pa->pa_pc; 149 sc->sc_tag = pa->pa_tag; 150 sc->sc_pa = pa; 151 sc->sc_iot = pa->pa_iot; 152 153 nfsmbca.nfsmb_iot = sc->sc_iot; 154 155 switch (PCI_PRODUCT(pa->pa_id)) { 156 case PCI_PRODUCT_NVIDIA_NFORCE2_SMBUS: 157 case PCI_PRODUCT_NVIDIA_NFORCE2_400_SMBUS: 158 case PCI_PRODUCT_NVIDIA_NFORCE3_SMBUS: 159 case PCI_PRODUCT_NVIDIA_NFORCE3_250_SMBUS: 160 case PCI_PRODUCT_NVIDIA_NFORCE4_SMBUS: 161 baseregs[0] = NFORCE_OLD_SMB1; 162 baseregs[1] = NFORCE_OLD_SMB2; 163 break; 164 default: 165 baseregs[0] = NFORCE_SMB1; 166 baseregs[1] = NFORCE_SMB2; 167 break; 168 } 169 170 reg = pci_conf_read(pa->pa_pc, pa->pa_tag, baseregs[0]); 171 nfsmbca.nfsmb_num = 1; 172 nfsmbca.nfsmb_addr = NFORCE_SMBBASE(reg); 173 sc->sc_nfsmb[0] = config_found(&sc->sc_dev, &nfsmbca, nfsmbc_print); 174 175 reg = pci_conf_read(pa->pa_pc, pa->pa_tag, baseregs[1]); 176 nfsmbca.nfsmb_num = 2; 177 nfsmbca.nfsmb_addr = NFORCE_SMBBASE(reg); 178 sc->sc_nfsmb[1] = config_found(&sc->sc_dev, &nfsmbca, nfsmbc_print); 179 } 180 181 static int 182 nfsmbc_print(void *aux, const char *pnp) 183 { 184 struct nfsmbc_attach_args *nfsmbcap = aux; 185 186 if (pnp) 187 aprint_normal("nfsmb SMBus %d at %s", 188 nfsmbcap->nfsmb_num, pnp); 189 else 190 aprint_normal(" SMBus %d", nfsmbcap->nfsmb_num); 191 return UNCONF; 192 } 193 194 195 CFATTACH_DECL(nfsmb, sizeof(struct nfsmb_softc), 196 nfsmb_match, nfsmb_attach, NULL, NULL); 197 198 static int 199 nfsmb_match(struct device *parent, struct cfdata *match, void *aux) 200 { 201 struct nfsmbc_attach_args *nfsmbcap = aux; 202 203 if (nfsmbcap->nfsmb_num == 1 || nfsmbcap->nfsmb_num == 2) 204 return 1; 205 return 0; 206 } 207 208 static void 209 nfsmb_attach(struct device *parent, struct device *self, void *aux) 210 { 211 struct nfsmb_softc *sc = (struct nfsmb_softc *) self; 212 struct nfsmbc_attach_args *nfsmbcap = aux; 213 struct i2cbus_attach_args iba; 214 215 aprint_naive("\n"); 216 aprint_normal("\n"); 217 218 sc->sc_nfsmbc = parent; 219 sc->sc_num = nfsmbcap->nfsmb_num; 220 sc->sc_iot = nfsmbcap->nfsmb_iot; 221 222 /* register with iic */ 223 sc->sc_i2c.ic_cookie = sc; 224 sc->sc_i2c.ic_acquire_bus = nfsmb_acquire_bus; 225 sc->sc_i2c.ic_release_bus = nfsmb_release_bus; 226 sc->sc_i2c.ic_send_start = NULL; 227 sc->sc_i2c.ic_send_stop = NULL; 228 sc->sc_i2c.ic_initiate_xfer = NULL; 229 sc->sc_i2c.ic_read_byte = NULL; 230 sc->sc_i2c.ic_write_byte = NULL; 231 sc->sc_i2c.ic_exec = nfsmb_exec; 232 233 rw_init(&sc->sc_rwlock); 234 235 if (bus_space_map(sc->sc_iot, nfsmbcap->nfsmb_addr, NFORCE_SMBSIZE, 0, 236 &sc->sc_ioh) != 0) { 237 aprint_error("%s: failed to map SMBus space\n", 238 sc->sc_dev.dv_xname); 239 return; 240 } 241 242 iba.iba_type = I2C_TYPE_SMBUS; 243 iba.iba_tag = &sc->sc_i2c; 244 (void) config_found_ia(&sc->sc_dev, "i2cbus", &iba, iicbus_print); 245 } 246 247 static int 248 nfsmb_acquire_bus(void *cookie, int flags) 249 { 250 struct nfsmb_softc *sc = cookie; 251 252 rw_enter(&sc->sc_rwlock, RW_WRITER); 253 return 0; 254 } 255 256 static void 257 nfsmb_release_bus(void *cookie, int flags) 258 { 259 struct nfsmb_softc *sc = cookie; 260 261 rw_exit(&sc->sc_rwlock); 262 } 263 264 static int 265 nfsmb_exec(void *cookie, i2c_op_t op, i2c_addr_t addr, const void *cmd, 266 size_t cmdlen, void *vbuf, size_t buflen, int flags) 267 { 268 struct nfsmb_softc *sc = (struct nfsmb_softc *)cookie; 269 uint8_t *p = vbuf; 270 int rv; 271 272 if (I2C_OP_READ_P(op) && (cmdlen == 0) && (buflen == 1)) { 273 rv = nfsmb_receive_1(sc, addr, op, flags); 274 if (rv == -1) 275 return -1; 276 *p = (uint8_t)rv; 277 return 0; 278 } 279 280 if ((I2C_OP_READ_P(op)) && (cmdlen == 1) && (buflen == 1)) { 281 rv = nfsmb_read_1(sc, *(const uint8_t*)cmd, addr, op, flags); 282 if (rv == -1) 283 return -1; 284 *p = (uint8_t)rv; 285 return 0; 286 } 287 288 if ((I2C_OP_READ_P(op)) && (cmdlen == 1) && (buflen == 2)) { 289 rv = nfsmb_read_2(sc, *(const uint8_t*)cmd, addr, op, flags); 290 if (rv == -1) 291 return -1; 292 *p = (uint8_t)rv; 293 return 0; 294 } 295 296 if ((I2C_OP_WRITE_P(op)) && (cmdlen == 0) && (buflen == 1)) 297 return nfsmb_send_1(sc, *(uint8_t*)vbuf, addr, op, flags); 298 299 if ((I2C_OP_WRITE_P(op)) && (cmdlen == 1) && (buflen == 1)) 300 return nfsmb_write_1(sc, *(const uint8_t*)cmd, *(uint8_t*)vbuf, 301 addr, op, flags); 302 303 if ((I2C_OP_WRITE_P(op)) && (cmdlen == 1) && (buflen == 2)) 304 return nfsmb_write_2(sc, 305 *(const uint8_t*)cmd, *((uint16_t *)vbuf), addr, op, flags); 306 307 return -1; 308 } 309 310 static int 311 nfsmb_check_done(struct nfsmb_softc *sc) 312 { 313 int us; 314 uint8_t stat; 315 316 us = 10 * 1000; /* XXXX: wait maximum 10 msec */ 317 do { 318 delay(10); 319 us -= 10; 320 if (us <= 0) 321 return -1; 322 } while (bus_space_read_1(sc->sc_iot, sc->sc_ioh, 323 NFORCE_SMB_PROTOCOL) != 0); 324 325 stat = bus_space_read_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_STATUS); 326 if ((stat & NFORCE_SMB_STATUS_DONE) && 327 !(stat & NFORCE_SMB_STATUS_STATUS)) 328 return 0; 329 return -1; 330 } 331 332 /* ARGSUSED */ 333 static int 334 nfsmb_send_1(struct nfsmb_softc *sc, uint8_t val, i2c_addr_t addr, i2c_op_t op, 335 int flags) 336 { 337 uint8_t data; 338 339 /* store cmd */ 340 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_COMMAND, val); 341 342 /* write smbus slave address to register */ 343 data = addr << 1; 344 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_ADDRESS, data); 345 346 /* write smbus protocol to register */ 347 data = I2C_OP_READ_P(op) | NFORCE_SMB_PROTOCOL_BYTE; 348 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_PROTOCOL, data); 349 350 return nfsmb_check_done(sc); 351 } 352 353 /* ARGSUSED */ 354 static int 355 nfsmb_write_1(struct nfsmb_softc *sc, uint8_t cmd, uint8_t val, i2c_addr_t addr, 356 i2c_op_t op, int flags) 357 { 358 uint8_t data; 359 360 /* store cmd */ 361 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_COMMAND, cmd); 362 363 /* store data */ 364 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_DATA, val); 365 366 /* write smbus slave address to register */ 367 data = addr << 1; 368 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_ADDRESS, data); 369 370 /* write smbus protocol to register */ 371 data = I2C_OP_READ_P(op) | NFORCE_SMB_PROTOCOL_BYTE_DATA; 372 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_PROTOCOL, data); 373 374 return nfsmb_check_done(sc); 375 } 376 377 static int 378 nfsmb_write_2(struct nfsmb_softc *sc, uint8_t cmd, uint16_t val, 379 i2c_addr_t addr, i2c_op_t op, int flags) 380 { 381 uint8_t data, low, high; 382 383 /* store cmd */ 384 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_COMMAND, cmd); 385 386 /* store data */ 387 low = val; 388 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_DATA, low); 389 high = val >> 8; 390 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_DATA, high); 391 392 /* write smbus slave address to register */ 393 data = addr << 1; 394 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_ADDRESS, data); 395 396 /* write smbus protocol to register */ 397 data = I2C_OP_READ_P(op) | NFORCE_SMB_PROTOCOL_WORD_DATA; 398 if (flags & I2C_F_PEC) 399 data |= NFORCE_SMB_PROTOCOL_PEC; 400 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_PROTOCOL, data); 401 402 return nfsmb_check_done(sc); 403 } 404 405 /* ARGSUSED */ 406 static int 407 nfsmb_receive_1(struct nfsmb_softc *sc, i2c_addr_t addr, i2c_op_t op, int flags) 408 { 409 uint8_t data; 410 411 /* write smbus slave address to register */ 412 data = addr << 1; 413 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_ADDRESS, data); 414 415 /* write smbus protocol to register */ 416 data = I2C_OP_READ_P(op) | NFORCE_SMB_PROTOCOL_BYTE; 417 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_PROTOCOL, data); 418 419 /* check for errors */ 420 if (nfsmb_check_done(sc) < 0) 421 return -1; 422 423 /* read data */ 424 return bus_space_read_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_DATA); 425 } 426 427 /* ARGSUSED */ 428 static int 429 nfsmb_read_1(struct nfsmb_softc *sc, uint8_t cmd, i2c_addr_t addr, i2c_op_t op, 430 int flags) 431 { 432 uint8_t data; 433 434 /* store cmd */ 435 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_COMMAND, cmd); 436 437 /* write smbus slave address to register */ 438 data = addr << 1; 439 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_ADDRESS, data); 440 441 /* write smbus protocol to register */ 442 data = I2C_OP_READ_P(op) | NFORCE_SMB_PROTOCOL_BYTE_DATA; 443 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_PROTOCOL, data); 444 445 /* check for errors */ 446 if (nfsmb_check_done(sc) < 0) 447 return -1; 448 449 /* read data */ 450 return bus_space_read_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_DATA); 451 } 452 453 static int 454 nfsmb_read_2(struct nfsmb_softc *sc, uint8_t cmd, i2c_addr_t addr, i2c_op_t op, 455 int flags) 456 { 457 uint8_t data, low, high; 458 459 /* store cmd */ 460 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_COMMAND, cmd); 461 462 /* write smbus slave address to register */ 463 data = addr << 1; 464 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_ADDRESS, data); 465 466 /* write smbus protocol to register */ 467 data = I2C_OP_READ_P(op) | NFORCE_SMB_PROTOCOL_BYTE_DATA; 468 if (flags & I2C_F_PEC) 469 data |= NFORCE_SMB_PROTOCOL_PEC; 470 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_PROTOCOL, data); 471 472 /* check for errors */ 473 if (nfsmb_check_done(sc) < 0) 474 return -1; 475 476 /* read data */ 477 low = bus_space_read_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_DATA); 478 high = bus_space_read_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_DATA); 479 return low | high << 8; 480 } 481
Indexes created Thu Oct 02 07:10:07 GMT 2025