nfsmb.c revision 1.13
1 /* $NetBSD: nfsmb.c,v 1.13 2008/05/25 20:51:22 cegger 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 1.13 2008/05/25 20:51:22 cegger 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 device_t 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 device_t 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(device_t, struct cfdata *, void *); 81 static void nfsmbc_attach(device_t, device_t, void *); 82 static int nfsmbc_print(void *, const char *); 83 84 static int nfsmb_match(device_t, struct cfdata *, void *); 85 static void nfsmb_attach(device_t, device_t, 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_NEW(nfsmbc, sizeof(struct nfsmbc_softc), 105 nfsmbc_match, nfsmbc_attach, NULL, NULL); 106 107 static int 108 nfsmbc_match(device_t 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(device_t parent, device_t self, void *aux) 135 { 136 struct nfsmbc_softc *sc = device_private(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_dev = self; 149 sc->sc_pc = pa->pa_pc; 150 sc->sc_tag = pa->pa_tag; 151 sc->sc_pa = pa; 152 sc->sc_iot = pa->pa_iot; 153 154 nfsmbca.nfsmb_iot = sc->sc_iot; 155 156 switch (PCI_PRODUCT(pa->pa_id)) { 157 case PCI_PRODUCT_NVIDIA_NFORCE2_SMBUS: 158 case PCI_PRODUCT_NVIDIA_NFORCE2_400_SMBUS: 159 case PCI_PRODUCT_NVIDIA_NFORCE3_SMBUS: 160 case PCI_PRODUCT_NVIDIA_NFORCE3_250_SMBUS: 161 case PCI_PRODUCT_NVIDIA_NFORCE4_SMBUS: 162 baseregs[0] = NFORCE_OLD_SMB1; 163 baseregs[1] = NFORCE_OLD_SMB2; 164 break; 165 default: 166 baseregs[0] = NFORCE_SMB1; 167 baseregs[1] = NFORCE_SMB2; 168 break; 169 } 170 171 reg = pci_conf_read(pa->pa_pc, pa->pa_tag, baseregs[0]); 172 nfsmbca.nfsmb_num = 1; 173 nfsmbca.nfsmb_addr = NFORCE_SMBBASE(reg); 174 sc->sc_nfsmb[0] = config_found(sc->sc_dev, &nfsmbca, nfsmbc_print); 175 176 reg = pci_conf_read(pa->pa_pc, pa->pa_tag, baseregs[1]); 177 nfsmbca.nfsmb_num = 2; 178 nfsmbca.nfsmb_addr = NFORCE_SMBBASE(reg); 179 sc->sc_nfsmb[1] = config_found(sc->sc_dev, &nfsmbca, nfsmbc_print); 180 181 if (!pmf_device_register(self, NULL, NULL)) 182 aprint_error_dev(self, "couldn't establish power handler\n"); 183 } 184 185 static int 186 nfsmbc_print(void *aux, const char *pnp) 187 { 188 struct nfsmbc_attach_args *nfsmbcap = aux; 189 190 if (pnp) 191 aprint_normal("nfsmb SMBus %d at %s", 192 nfsmbcap->nfsmb_num, pnp); 193 else 194 aprint_normal(" SMBus %d", nfsmbcap->nfsmb_num); 195 return UNCONF; 196 } 197 198 199 CFATTACH_DECL_NEW(nfsmb, sizeof(struct nfsmb_softc), 200 nfsmb_match, nfsmb_attach, NULL, NULL); 201 202 static int 203 nfsmb_match(device_t parent, struct cfdata *match, void *aux) 204 { 205 struct nfsmbc_attach_args *nfsmbcap = aux; 206 207 if (nfsmbcap->nfsmb_num == 1 || nfsmbcap->nfsmb_num == 2) 208 return 1; 209 return 0; 210 } 211 212 static void 213 nfsmb_attach(device_t parent, device_t self, void *aux) 214 { 215 struct nfsmb_softc *sc = device_private(self); 216 struct nfsmbc_attach_args *nfsmbcap = aux; 217 struct i2cbus_attach_args iba; 218 219 aprint_naive("\n"); 220 aprint_normal("\n"); 221 222 sc->sc_dev = self; 223 sc->sc_nfsmbc = parent; 224 sc->sc_num = nfsmbcap->nfsmb_num; 225 sc->sc_iot = nfsmbcap->nfsmb_iot; 226 227 /* register with iic */ 228 sc->sc_i2c.ic_cookie = sc; 229 sc->sc_i2c.ic_acquire_bus = nfsmb_acquire_bus; 230 sc->sc_i2c.ic_release_bus = nfsmb_release_bus; 231 sc->sc_i2c.ic_send_start = NULL; 232 sc->sc_i2c.ic_send_stop = NULL; 233 sc->sc_i2c.ic_initiate_xfer = NULL; 234 sc->sc_i2c.ic_read_byte = NULL; 235 sc->sc_i2c.ic_write_byte = NULL; 236 sc->sc_i2c.ic_exec = nfsmb_exec; 237 238 rw_init(&sc->sc_rwlock); 239 240 if (bus_space_map(sc->sc_iot, nfsmbcap->nfsmb_addr, NFORCE_SMBSIZE, 0, 241 &sc->sc_ioh) != 0) { 242 aprint_error_dev(self, "failed to map SMBus space\n"); 243 return; 244 } 245 246 iba.iba_type = I2C_TYPE_SMBUS; 247 iba.iba_tag = &sc->sc_i2c; 248 (void) config_found_ia(sc->sc_dev, "i2cbus", &iba, iicbus_print); 249 250 if (!pmf_device_register(self, NULL, NULL)) 251 aprint_error_dev(self, "couldn't establish power handler\n"); 252 } 253 254 static int 255 nfsmb_acquire_bus(void *cookie, int flags) 256 { 257 struct nfsmb_softc *sc = cookie; 258 259 rw_enter(&sc->sc_rwlock, RW_WRITER); 260 return 0; 261 } 262 263 static void 264 nfsmb_release_bus(void *cookie, int flags) 265 { 266 struct nfsmb_softc *sc = cookie; 267 268 rw_exit(&sc->sc_rwlock); 269 } 270 271 static int 272 nfsmb_exec(void *cookie, i2c_op_t op, i2c_addr_t addr, const void *cmd, 273 size_t cmdlen, void *vbuf, size_t buflen, int flags) 274 { 275 struct nfsmb_softc *sc = (struct nfsmb_softc *)cookie; 276 uint8_t *p = vbuf; 277 int rv; 278 279 if (I2C_OP_READ_P(op) && (cmdlen == 0) && (buflen == 1)) { 280 rv = nfsmb_receive_1(sc, addr, op, flags); 281 if (rv == -1) 282 return -1; 283 *p = (uint8_t)rv; 284 return 0; 285 } 286 287 if ((I2C_OP_READ_P(op)) && (cmdlen == 1) && (buflen == 1)) { 288 rv = nfsmb_read_1(sc, *(const uint8_t*)cmd, addr, op, flags); 289 if (rv == -1) 290 return -1; 291 *p = (uint8_t)rv; 292 return 0; 293 } 294 295 if ((I2C_OP_READ_P(op)) && (cmdlen == 1) && (buflen == 2)) { 296 rv = nfsmb_read_2(sc, *(const uint8_t*)cmd, addr, op, flags); 297 if (rv == -1) 298 return -1; 299 *p = (uint8_t)rv; 300 return 0; 301 } 302 303 if ((I2C_OP_WRITE_P(op)) && (cmdlen == 0) && (buflen == 1)) 304 return nfsmb_send_1(sc, *(uint8_t*)vbuf, addr, op, flags); 305 306 if ((I2C_OP_WRITE_P(op)) && (cmdlen == 1) && (buflen == 1)) 307 return nfsmb_write_1(sc, *(const uint8_t*)cmd, *(uint8_t*)vbuf, 308 addr, op, flags); 309 310 if ((I2C_OP_WRITE_P(op)) && (cmdlen == 1) && (buflen == 2)) 311 return nfsmb_write_2(sc, 312 *(const uint8_t*)cmd, *((uint16_t *)vbuf), addr, op, flags); 313 314 return -1; 315 } 316 317 static int 318 nfsmb_check_done(struct nfsmb_softc *sc) 319 { 320 int us; 321 uint8_t stat; 322 323 us = 10 * 1000; /* XXXX: wait maximum 10 msec */ 324 do { 325 delay(10); 326 us -= 10; 327 if (us <= 0) 328 return -1; 329 } while (bus_space_read_1(sc->sc_iot, sc->sc_ioh, 330 NFORCE_SMB_PROTOCOL) != 0); 331 332 stat = bus_space_read_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_STATUS); 333 if ((stat & NFORCE_SMB_STATUS_DONE) && 334 !(stat & NFORCE_SMB_STATUS_STATUS)) 335 return 0; 336 return -1; 337 } 338 339 /* ARGSUSED */ 340 static int 341 nfsmb_send_1(struct nfsmb_softc *sc, uint8_t val, i2c_addr_t addr, i2c_op_t op, 342 int flags) 343 { 344 uint8_t data; 345 346 /* store cmd */ 347 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_COMMAND, val); 348 349 /* write smbus slave address to register */ 350 data = addr << 1; 351 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_ADDRESS, data); 352 353 /* write smbus protocol to register */ 354 data = I2C_OP_READ_P(op) | NFORCE_SMB_PROTOCOL_BYTE; 355 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_PROTOCOL, data); 356 357 return nfsmb_check_done(sc); 358 } 359 360 /* ARGSUSED */ 361 static int 362 nfsmb_write_1(struct nfsmb_softc *sc, uint8_t cmd, uint8_t val, i2c_addr_t addr, 363 i2c_op_t op, int flags) 364 { 365 uint8_t data; 366 367 /* store cmd */ 368 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_COMMAND, cmd); 369 370 /* store data */ 371 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_DATA, val); 372 373 /* write smbus slave address to register */ 374 data = addr << 1; 375 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_ADDRESS, data); 376 377 /* write smbus protocol to register */ 378 data = I2C_OP_READ_P(op) | NFORCE_SMB_PROTOCOL_BYTE_DATA; 379 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_PROTOCOL, data); 380 381 return nfsmb_check_done(sc); 382 } 383 384 static int 385 nfsmb_write_2(struct nfsmb_softc *sc, uint8_t cmd, uint16_t val, 386 i2c_addr_t addr, i2c_op_t op, int flags) 387 { 388 uint8_t data, low, high; 389 390 /* store cmd */ 391 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_COMMAND, cmd); 392 393 /* store data */ 394 low = val; 395 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_DATA, low); 396 high = val >> 8; 397 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_DATA, high); 398 399 /* write smbus slave address to register */ 400 data = addr << 1; 401 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_ADDRESS, data); 402 403 /* write smbus protocol to register */ 404 data = I2C_OP_READ_P(op) | NFORCE_SMB_PROTOCOL_WORD_DATA; 405 if (flags & I2C_F_PEC) 406 data |= NFORCE_SMB_PROTOCOL_PEC; 407 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_PROTOCOL, data); 408 409 return nfsmb_check_done(sc); 410 } 411 412 /* ARGSUSED */ 413 static int 414 nfsmb_receive_1(struct nfsmb_softc *sc, i2c_addr_t addr, i2c_op_t op, int flags) 415 { 416 uint8_t data; 417 418 /* write smbus slave address to register */ 419 data = addr << 1; 420 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_ADDRESS, data); 421 422 /* write smbus protocol to register */ 423 data = I2C_OP_READ_P(op) | NFORCE_SMB_PROTOCOL_BYTE; 424 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_PROTOCOL, data); 425 426 /* check for errors */ 427 if (nfsmb_check_done(sc) < 0) 428 return -1; 429 430 /* read data */ 431 return bus_space_read_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_DATA); 432 } 433 434 /* ARGSUSED */ 435 static int 436 nfsmb_read_1(struct nfsmb_softc *sc, uint8_t cmd, i2c_addr_t addr, i2c_op_t op, 437 int flags) 438 { 439 uint8_t data; 440 441 /* store cmd */ 442 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_COMMAND, cmd); 443 444 /* write smbus slave address to register */ 445 data = addr << 1; 446 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_ADDRESS, data); 447 448 /* write smbus protocol to register */ 449 data = I2C_OP_READ_P(op) | NFORCE_SMB_PROTOCOL_BYTE_DATA; 450 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_PROTOCOL, data); 451 452 /* check for errors */ 453 if (nfsmb_check_done(sc) < 0) 454 return -1; 455 456 /* read data */ 457 return bus_space_read_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_DATA); 458 } 459 460 static int 461 nfsmb_read_2(struct nfsmb_softc *sc, uint8_t cmd, i2c_addr_t addr, i2c_op_t op, 462 int flags) 463 { 464 uint8_t data, low, high; 465 466 /* store cmd */ 467 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_COMMAND, cmd); 468 469 /* write smbus slave address to register */ 470 data = addr << 1; 471 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_ADDRESS, data); 472 473 /* write smbus protocol to register */ 474 data = I2C_OP_READ_P(op) | NFORCE_SMB_PROTOCOL_BYTE_DATA; 475 if (flags & I2C_F_PEC) 476 data |= NFORCE_SMB_PROTOCOL_PEC; 477 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_PROTOCOL, data); 478 479 /* check for errors */ 480 if (nfsmb_check_done(sc) < 0) 481 return -1; 482 483 /* read data */ 484 low = bus_space_read_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_DATA); 485 high = bus_space_read_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_DATA); 486 return low | high << 8; 487 } 488
Indexes created Tue Sep 30 07:10:03 GMT 2025