nfsmb.c revision 1.7
1 /* $NetBSD: nfsmb.c,v 1.7 2007/10/19 12:00:53 ad 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 1.7 2007/10/19 12:00:53 ad 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_MCP04_SMBUS: 120 return 1; 121 } 122 } 123 124 return 0; 125 } 126 127 static void 128 nfsmbc_attach(struct device *parent, struct device *self, void *aux) 129 { 130 struct nfsmbc_softc *sc = (struct nfsmbc_softc *) self; 131 struct pci_attach_args *pa = aux; 132 struct nfsmbc_attach_args nfsmbca; 133 pcireg_t reg; 134 char devinfo[256]; 135 136 aprint_naive("\n"); 137 pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo, sizeof(devinfo)); 138 aprint_normal(": %s (rev. 0x%02x)\n", devinfo, 139 PCI_REVISION(pa->pa_class)); 140 141 sc->sc_pc = pa->pa_pc; 142 sc->sc_tag = pa->pa_tag; 143 sc->sc_pa = pa; 144 sc->sc_iot = pa->pa_iot; 145 146 nfsmbca.nfsmb_iot = sc->sc_iot; 147 148 reg = pci_conf_read(pa->pa_pc, pa->pa_tag, NFORCE_SMB1); 149 nfsmbca.nfsmb_num = 1; 150 nfsmbca.nfsmb_addr = NFORCE_SMBBASE(reg); 151 sc->sc_nfsmb[0] = config_found(&sc->sc_dev, &nfsmbca, nfsmbc_print); 152 153 reg = pci_conf_read(pa->pa_pc, pa->pa_tag, NFORCE_SMB2); 154 nfsmbca.nfsmb_num = 2; 155 nfsmbca.nfsmb_addr = NFORCE_SMBBASE(reg); 156 sc->sc_nfsmb[1] = config_found(&sc->sc_dev, &nfsmbca, nfsmbc_print); 157 } 158 159 static int 160 nfsmbc_print(void *aux, const char *pnp) 161 { 162 struct nfsmbc_attach_args *nfsmbcap = aux; 163 164 if (pnp) 165 aprint_normal("nfsmb SMBus %d at %s", 166 nfsmbcap->nfsmb_num, pnp); 167 else 168 aprint_normal(" SMBus %d", nfsmbcap->nfsmb_num); 169 return UNCONF; 170 } 171 172 173 CFATTACH_DECL(nfsmb, sizeof(struct nfsmb_softc), 174 nfsmb_match, nfsmb_attach, NULL, NULL); 175 176 static int 177 nfsmb_match(struct device *parent, struct cfdata *match, void *aux) 178 { 179 struct nfsmbc_attach_args *nfsmbcap = aux; 180 181 if (nfsmbcap->nfsmb_num == 1 || nfsmbcap->nfsmb_num == 2) 182 return 1; 183 return 0; 184 } 185 186 static void 187 nfsmb_attach(struct device *parent, struct device *self, void *aux) 188 { 189 struct nfsmb_softc *sc = (struct nfsmb_softc *) self; 190 struct nfsmbc_attach_args *nfsmbcap = aux; 191 struct i2cbus_attach_args iba; 192 193 aprint_naive("\n"); 194 aprint_normal("\n"); 195 196 sc->sc_nfsmbc = parent; 197 sc->sc_num = nfsmbcap->nfsmb_num; 198 sc->sc_iot = nfsmbcap->nfsmb_iot; 199 200 /* register with iic */ 201 sc->sc_i2c.ic_cookie = sc; 202 sc->sc_i2c.ic_acquire_bus = nfsmb_acquire_bus; 203 sc->sc_i2c.ic_release_bus = nfsmb_release_bus; 204 sc->sc_i2c.ic_send_start = NULL; 205 sc->sc_i2c.ic_send_stop = NULL; 206 sc->sc_i2c.ic_initiate_xfer = NULL; 207 sc->sc_i2c.ic_read_byte = NULL; 208 sc->sc_i2c.ic_write_byte = NULL; 209 sc->sc_i2c.ic_exec = nfsmb_exec; 210 211 rw_init(&sc->sc_rwlock); 212 213 if (bus_space_map(sc->sc_iot, nfsmbcap->nfsmb_addr, NFORCE_SMBSIZE, 0, 214 &sc->sc_ioh) != 0) { 215 aprint_error("%s: failed to map SMBus space\n", 216 sc->sc_dev.dv_xname); 217 return; 218 } 219 220 iba.iba_type = I2C_TYPE_SMBUS; 221 iba.iba_tag = &sc->sc_i2c; 222 (void) config_found_ia(&sc->sc_dev, "i2cbus", &iba, iicbus_print); 223 } 224 225 static int 226 nfsmb_acquire_bus(void *cookie, int flags) 227 { 228 struct nfsmb_softc *sc = cookie; 229 230 rw_enter(&sc->sc_rwlock, RW_WRITER); 231 return 0; 232 } 233 234 static void 235 nfsmb_release_bus(void *cookie, int flags) 236 { 237 struct nfsmb_softc *sc = cookie; 238 239 rw_exit(&sc->sc_rwlock); 240 } 241 242 static int 243 nfsmb_exec(void *cookie, i2c_op_t op, i2c_addr_t addr, const void *cmd, 244 size_t cmdlen, void *vbuf, size_t buflen, int flags) 245 { 246 struct nfsmb_softc *sc = (struct nfsmb_softc *)cookie; 247 uint8_t *p = vbuf; 248 int rv; 249 250 if (I2C_OP_READ_P(op) && (cmdlen == 0) && (buflen == 1)) { 251 rv = nfsmb_receive_1(sc, addr, op, flags); 252 if (rv == -1) 253 return -1; 254 *p = (uint8_t)rv; 255 return 0; 256 } 257 258 if ((I2C_OP_READ_P(op)) && (cmdlen == 1) && (buflen == 1)) { 259 rv = nfsmb_read_1(sc, *(const uint8_t*)cmd, addr, op, flags); 260 if (rv == -1) 261 return -1; 262 *p = (uint8_t)rv; 263 return 0; 264 } 265 266 if ((I2C_OP_READ_P(op)) && (cmdlen == 1) && (buflen == 2)) { 267 rv = nfsmb_read_2(sc, *(const uint8_t*)cmd, addr, op, flags); 268 if (rv == -1) 269 return -1; 270 *p = (uint8_t)rv; 271 return 0; 272 } 273 274 if ((I2C_OP_WRITE_P(op)) && (cmdlen == 0) && (buflen == 1)) 275 return nfsmb_send_1(sc, *(uint8_t*)vbuf, addr, op, flags); 276 277 if ((I2C_OP_WRITE_P(op)) && (cmdlen == 1) && (buflen == 1)) 278 return nfsmb_write_1(sc, *(const uint8_t*)cmd, *(uint8_t*)vbuf, 279 addr, op, flags); 280 281 if ((I2C_OP_WRITE_P(op)) && (cmdlen == 1) && (buflen == 2)) 282 return nfsmb_write_2(sc, 283 *(const uint8_t*)cmd, *((uint16_t *)vbuf), addr, op, flags); 284 285 return -1; 286 } 287 288 static int 289 nfsmb_check_done(struct nfsmb_softc *sc) 290 { 291 int us; 292 uint8_t stat; 293 294 us = 10 * 1000; /* XXXX: wait maximum 10 msec */ 295 do { 296 delay(10); 297 us -= 10; 298 if (us <= 0) 299 return -1; 300 } while (bus_space_read_1(sc->sc_iot, sc->sc_ioh, 301 NFORCE_SMB_PROTOCOL) != 0); 302 303 stat = bus_space_read_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_STATUS); 304 if ((stat & NFORCE_SMB_STATUS_DONE) && 305 !(stat & NFORCE_SMB_STATUS_STATUS)) 306 return 0; 307 return -1; 308 } 309 310 /* ARGSUSED */ 311 static int 312 nfsmb_send_1(struct nfsmb_softc *sc, uint8_t val, i2c_addr_t addr, i2c_op_t op, 313 int flags) 314 { 315 uint8_t data; 316 317 /* store cmd */ 318 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_COMMAND, val); 319 320 /* write smbus slave address to register */ 321 data = addr << 1; 322 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_ADDRESS, data); 323 324 /* write smbus protocol to register */ 325 data = I2C_OP_READ_P(op) | NFORCE_SMB_PROTOCOL_BYTE; 326 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_PROTOCOL, data); 327 328 return nfsmb_check_done(sc); 329 } 330 331 /* ARGSUSED */ 332 static int 333 nfsmb_write_1(struct nfsmb_softc *sc, uint8_t cmd, uint8_t val, i2c_addr_t addr, 334 i2c_op_t op, int flags) 335 { 336 uint8_t data; 337 338 /* store cmd */ 339 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_COMMAND, cmd); 340 341 /* store data */ 342 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_DATA, val); 343 344 /* write smbus slave address to register */ 345 data = addr << 1; 346 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_ADDRESS, data); 347 348 /* write smbus protocol to register */ 349 data = I2C_OP_READ_P(op) | NFORCE_SMB_PROTOCOL_BYTE_DATA; 350 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_PROTOCOL, data); 351 352 return nfsmb_check_done(sc); 353 } 354 355 static int 356 nfsmb_write_2(struct nfsmb_softc *sc, uint8_t cmd, uint16_t val, 357 i2c_addr_t addr, i2c_op_t op, int flags) 358 { 359 uint8_t data, low, high; 360 361 /* store cmd */ 362 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_COMMAND, cmd); 363 364 /* store data */ 365 low = val; 366 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_DATA, low); 367 high = val >> 8; 368 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_DATA, high); 369 370 /* write smbus slave address to register */ 371 data = addr << 1; 372 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_ADDRESS, data); 373 374 /* write smbus protocol to register */ 375 data = I2C_OP_READ_P(op) | NFORCE_SMB_PROTOCOL_WORD_DATA; 376 if (flags & I2C_F_PEC) 377 data |= NFORCE_SMB_PROTOCOL_PEC; 378 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_PROTOCOL, data); 379 380 return nfsmb_check_done(sc); 381 } 382 383 /* ARGSUSED */ 384 static int 385 nfsmb_receive_1(struct nfsmb_softc *sc, i2c_addr_t addr, i2c_op_t op, int flags) 386 { 387 uint8_t data; 388 389 /* write smbus slave address to register */ 390 data = addr << 1; 391 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_ADDRESS, data); 392 393 /* write smbus protocol to register */ 394 data = I2C_OP_READ_P(op) | NFORCE_SMB_PROTOCOL_BYTE; 395 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_PROTOCOL, data); 396 397 /* check for errors */ 398 if (nfsmb_check_done(sc) < 0) 399 return -1; 400 401 /* read data */ 402 return bus_space_read_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_DATA); 403 } 404 405 /* ARGSUSED */ 406 static int 407 nfsmb_read_1(struct nfsmb_softc *sc, uint8_t cmd, i2c_addr_t addr, i2c_op_t op, 408 int flags) 409 { 410 uint8_t data; 411 412 /* store cmd */ 413 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_COMMAND, cmd); 414 415 /* write smbus slave address to register */ 416 data = addr << 1; 417 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_ADDRESS, data); 418 419 /* write smbus protocol to register */ 420 data = I2C_OP_READ_P(op) | NFORCE_SMB_PROTOCOL_BYTE_DATA; 421 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_PROTOCOL, data); 422 423 /* check for errors */ 424 if (nfsmb_check_done(sc) < 0) 425 return -1; 426 427 /* read data */ 428 return bus_space_read_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_DATA); 429 } 430 431 static int 432 nfsmb_read_2(struct nfsmb_softc *sc, uint8_t cmd, i2c_addr_t addr, i2c_op_t op, 433 int flags) 434 { 435 uint8_t data, low, high; 436 437 /* store cmd */ 438 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_COMMAND, cmd); 439 440 /* write smbus slave address to register */ 441 data = addr << 1; 442 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_ADDRESS, data); 443 444 /* write smbus protocol to register */ 445 data = I2C_OP_READ_P(op) | NFORCE_SMB_PROTOCOL_BYTE_DATA; 446 if (flags & I2C_F_PEC) 447 data |= NFORCE_SMB_PROTOCOL_PEC; 448 bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_PROTOCOL, data); 449 450 /* check for errors */ 451 if (nfsmb_check_done(sc) < 0) 452 return -1; 453 454 /* read data */ 455 low = bus_space_read_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_DATA); 456 high = bus_space_read_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_DATA); 457 return low | high << 8; 458 } 459
Indexes created Tue Sep 30 07:10:03 GMT 2025