| 1 | /* $NetBSD: nfsmb.c,v 1.24 2016/02/14 19:54:21 chs 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 1.24 2016/02/14 19:54:21 chs 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/mutex.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 | device_t sc_nfsmb[2]; |
| 65 | }; |
| 66 | |
| 67 | struct nfsmb_softc { |
| 68 | device_t sc_dev; |
| 69 | int sc_num; |
| 70 | device_t 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 | kmutex_t sc_mutex; |
| 77 | }; |
| 78 | |
| 79 | |
| 80 | static int nfsmbc_match(device_t, cfdata_t, 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, cfdata_t, 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 | static int |
| 103 | nfsmb_quick(struct nfsmb_softc *, i2c_addr_t, i2c_op_t, int); |
| 104 | |
| 105 | CFATTACH_DECL_NEW(nfsmbc, sizeof(struct nfsmbc_softc), |
| 106 | nfsmbc_match, nfsmbc_attach, NULL, NULL); |
| 107 | |
| 108 | static int |
| 109 | nfsmbc_match(device_t parent, cfdata_t match, void *aux) |
| 110 | { |
| 111 | struct pci_attach_args *pa = aux; |
| 112 | |
| 113 | if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_NVIDIA) { |
| 114 | switch (PCI_PRODUCT(pa->pa_id)) { |
| 115 | case PCI_PRODUCT_NVIDIA_NFORCE2_SMBUS: |
| 116 | case PCI_PRODUCT_NVIDIA_NFORCE2_400_SMBUS: |
| 117 | case PCI_PRODUCT_NVIDIA_NFORCE3_SMBUS: |
| 118 | case PCI_PRODUCT_NVIDIA_NFORCE3_250_SMBUS: |
| 119 | case PCI_PRODUCT_NVIDIA_NFORCE4_SMBUS: |
| 120 | case PCI_PRODUCT_NVIDIA_NFORCE430_SMBUS: |
| 121 | case PCI_PRODUCT_NVIDIA_MCP04_SMBUS: |
| 122 | case PCI_PRODUCT_NVIDIA_MCP55_SMB: |
| 123 | case PCI_PRODUCT_NVIDIA_MCP61_SMB: |
| 124 | case PCI_PRODUCT_NVIDIA_MCP65_SMB: |
| 125 | case PCI_PRODUCT_NVIDIA_MCP67_SMB: |
| 126 | case PCI_PRODUCT_NVIDIA_MCP73_SMB: |
| 127 | case PCI_PRODUCT_NVIDIA_MCP78S_SMB: |
| 128 | case PCI_PRODUCT_NVIDIA_MCP79_SMB: |
| 129 | return 1; |
| 130 | } |
| 131 | } |
| 132 | |
| 133 | return 0; |
| 134 | } |
| 135 | |
| 136 | static void |
| 137 | nfsmbc_attach(device_t parent, device_t self, void *aux) |
| 138 | { |
| 139 | struct nfsmbc_softc *sc = device_private(self); |
| 140 | struct pci_attach_args *pa = aux; |
| 141 | struct nfsmbc_attach_args nfsmbca; |
| 142 | pcireg_t reg; |
| 143 | int baseregs[2]; |
| 144 | |
| 145 | pci_aprint_devinfo(pa, NULL); |
| 146 | |
| 147 | sc->sc_dev = self; |
| 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 | /* This driver is similar to an ISA bridge that doesn't |
| 181 | * need any special handling. So registering NULL handlers |
| 182 | * are sufficent. */ |
| 183 | if (!pmf_device_register(self, NULL, NULL)) |
| 184 | aprint_error_dev(self, "couldn't establish power handler\n" ); |
| 185 | } |
| 186 | |
| 187 | static int |
| 188 | nfsmbc_print(void *aux, const char *pnp) |
| 189 | { |
| 190 | struct nfsmbc_attach_args *nfsmbcap = aux; |
| 191 | |
| 192 | if (pnp) |
| 193 | aprint_normal("nfsmb SMBus %d at %s" , |
| 194 | nfsmbcap->nfsmb_num, pnp); |
| 195 | else |
| 196 | aprint_normal(" SMBus %d" , nfsmbcap->nfsmb_num); |
| 197 | return UNCONF; |
| 198 | } |
| 199 | |
| 200 | |
| 201 | CFATTACH_DECL_NEW(nfsmb, sizeof(struct nfsmb_softc), |
| 202 | nfsmb_match, nfsmb_attach, NULL, NULL); |
| 203 | |
| 204 | static int |
| 205 | nfsmb_match(device_t parent, cfdata_t match, void *aux) |
| 206 | { |
| 207 | struct nfsmbc_attach_args *nfsmbcap = aux; |
| 208 | |
| 209 | if (nfsmbcap->nfsmb_num == 1 || nfsmbcap->nfsmb_num == 2) |
| 210 | return 1; |
| 211 | return 0; |
| 212 | } |
| 213 | |
| 214 | static void |
| 215 | nfsmb_attach(device_t parent, device_t self, void *aux) |
| 216 | { |
| 217 | struct nfsmb_softc *sc = device_private(self); |
| 218 | struct nfsmbc_attach_args *nfsmbcap = aux; |
| 219 | struct i2cbus_attach_args iba; |
| 220 | |
| 221 | aprint_naive("\n" ); |
| 222 | aprint_normal("\n" ); |
| 223 | |
| 224 | sc->sc_dev = self; |
| 225 | sc->sc_nfsmbc = parent; |
| 226 | sc->sc_num = nfsmbcap->nfsmb_num; |
| 227 | sc->sc_iot = nfsmbcap->nfsmb_iot; |
| 228 | |
| 229 | /* register with iic */ |
| 230 | sc->sc_i2c.ic_cookie = sc; |
| 231 | sc->sc_i2c.ic_acquire_bus = nfsmb_acquire_bus; |
| 232 | sc->sc_i2c.ic_release_bus = nfsmb_release_bus; |
| 233 | sc->sc_i2c.ic_send_start = NULL; |
| 234 | sc->sc_i2c.ic_send_stop = NULL; |
| 235 | sc->sc_i2c.ic_initiate_xfer = NULL; |
| 236 | sc->sc_i2c.ic_read_byte = NULL; |
| 237 | sc->sc_i2c.ic_write_byte = NULL; |
| 238 | sc->sc_i2c.ic_exec = nfsmb_exec; |
| 239 | |
| 240 | mutex_init(&sc->sc_mutex, MUTEX_DEFAULT, IPL_NONE); |
| 241 | |
| 242 | if (bus_space_map(sc->sc_iot, nfsmbcap->nfsmb_addr, NFORCE_SMBSIZE, 0, |
| 243 | &sc->sc_ioh) != 0) { |
| 244 | aprint_error_dev(self, "failed to map SMBus space\n" ); |
| 245 | return; |
| 246 | } |
| 247 | |
| 248 | memset(&iba, 0, sizeof(iba)); |
| 249 | iba.iba_type = I2C_TYPE_SMBUS; |
| 250 | iba.iba_tag = &sc->sc_i2c; |
| 251 | (void) config_found_ia(sc->sc_dev, "i2cbus" , &iba, iicbus_print); |
| 252 | |
| 253 | /* This driver is similar to an ISA bridge that doesn't |
| 254 | * need any special handling. So registering NULL handlers |
| 255 | * are sufficent. */ |
| 256 | if (!pmf_device_register(self, NULL, NULL)) |
| 257 | aprint_error_dev(self, "couldn't establish power handler\n" ); |
| 258 | } |
| 259 | |
| 260 | static int |
| 261 | nfsmb_acquire_bus(void *cookie, int flags) |
| 262 | { |
| 263 | struct nfsmb_softc *sc = cookie; |
| 264 | |
| 265 | mutex_enter(&sc->sc_mutex); |
| 266 | return 0; |
| 267 | } |
| 268 | |
| 269 | static void |
| 270 | nfsmb_release_bus(void *cookie, int flags) |
| 271 | { |
| 272 | struct nfsmb_softc *sc = cookie; |
| 273 | |
| 274 | mutex_exit(&sc->sc_mutex); |
| 275 | } |
| 276 | |
| 277 | static int |
| 278 | nfsmb_exec(void *cookie, i2c_op_t op, i2c_addr_t addr, const void *cmd, |
| 279 | size_t cmdlen, void *vbuf, size_t buflen, int flags) |
| 280 | { |
| 281 | struct nfsmb_softc *sc = (struct nfsmb_softc *)cookie; |
| 282 | uint8_t *p = vbuf; |
| 283 | int rv; |
| 284 | |
| 285 | if ((cmdlen == 0) && (buflen == 0)) { |
| 286 | return nfsmb_quick(sc, addr, op, flags); |
| 287 | } |
| 288 | |
| 289 | if (I2C_OP_READ_P(op) && (cmdlen == 0) && (buflen == 1)) { |
| 290 | rv = nfsmb_receive_1(sc, addr, op, flags); |
| 291 | if (rv == -1) |
| 292 | return -1; |
| 293 | *p = (uint8_t)rv; |
| 294 | return 0; |
| 295 | } |
| 296 | |
| 297 | if ((I2C_OP_READ_P(op)) && (cmdlen == 1) && (buflen == 1)) { |
| 298 | rv = nfsmb_read_1(sc, *(const uint8_t*)cmd, addr, op, flags); |
| 299 | if (rv == -1) |
| 300 | return -1; |
| 301 | *p = (uint8_t)rv; |
| 302 | return 0; |
| 303 | } |
| 304 | |
| 305 | if ((I2C_OP_READ_P(op)) && (cmdlen == 1) && (buflen == 2)) { |
| 306 | rv = nfsmb_read_2(sc, *(const uint8_t*)cmd, addr, op, flags); |
| 307 | if (rv == -1) |
| 308 | return -1; |
| 309 | *(uint16_t *)p = (uint16_t)rv; |
| 310 | return 0; |
| 311 | } |
| 312 | |
| 313 | if ((I2C_OP_WRITE_P(op)) && (cmdlen == 0) && (buflen == 1)) |
| 314 | return nfsmb_send_1(sc, *(uint8_t*)vbuf, addr, op, flags); |
| 315 | |
| 316 | if ((I2C_OP_WRITE_P(op)) && (cmdlen == 1) && (buflen == 1)) |
| 317 | return nfsmb_write_1(sc, *(const uint8_t*)cmd, *(uint8_t*)vbuf, |
| 318 | addr, op, flags); |
| 319 | |
| 320 | if ((I2C_OP_WRITE_P(op)) && (cmdlen == 1) && (buflen == 2)) |
| 321 | return nfsmb_write_2(sc, |
| 322 | *(const uint8_t*)cmd, *((uint16_t *)vbuf), addr, op, flags); |
| 323 | |
| 324 | return -1; |
| 325 | } |
| 326 | |
| 327 | static int |
| 328 | nfsmb_check_done(struct nfsmb_softc *sc) |
| 329 | { |
| 330 | int us; |
| 331 | uint8_t stat; |
| 332 | |
| 333 | us = 10 * 1000; /* XXXX: wait maximum 10 msec */ |
| 334 | do { |
| 335 | delay(10); |
| 336 | us -= 10; |
| 337 | if (us <= 0) |
| 338 | return -1; |
| 339 | } while (bus_space_read_1(sc->sc_iot, sc->sc_ioh, |
| 340 | NFORCE_SMB_PROTOCOL) != 0); |
| 341 | |
| 342 | stat = bus_space_read_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_STATUS); |
| 343 | if ((stat & NFORCE_SMB_STATUS_DONE) && |
| 344 | !(stat & NFORCE_SMB_STATUS_STATUS)) |
| 345 | return 0; |
| 346 | return -1; |
| 347 | } |
| 348 | |
| 349 | /* ARGSUSED */ |
| 350 | static int |
| 351 | nfsmb_quick(struct nfsmb_softc *sc, i2c_addr_t addr, i2c_op_t op, int flags) |
| 352 | { |
| 353 | uint8_t data; |
| 354 | |
| 355 | /* write smbus slave address to register */ |
| 356 | data = addr << 1; |
| 357 | bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_ADDRESS, data); |
| 358 | |
| 359 | /* write smbus protocol to register */ |
| 360 | data = I2C_OP_READ_P(op) | NFORCE_SMB_PROTOCOL_QUICK; |
| 361 | bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_PROTOCOL, data); |
| 362 | |
| 363 | return nfsmb_check_done(sc); |
| 364 | } |
| 365 | |
| 366 | /* ARGSUSED */ |
| 367 | static int |
| 368 | nfsmb_send_1(struct nfsmb_softc *sc, uint8_t val, i2c_addr_t addr, i2c_op_t op, |
| 369 | int flags) |
| 370 | { |
| 371 | uint8_t data; |
| 372 | |
| 373 | /* store cmd */ |
| 374 | bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_COMMAND, val); |
| 375 | |
| 376 | /* write smbus slave address to register */ |
| 377 | data = addr << 1; |
| 378 | bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_ADDRESS, data); |
| 379 | |
| 380 | /* write smbus protocol to register */ |
| 381 | data = I2C_OP_READ_P(op) | NFORCE_SMB_PROTOCOL_BYTE; |
| 382 | bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_PROTOCOL, data); |
| 383 | |
| 384 | return nfsmb_check_done(sc); |
| 385 | } |
| 386 | |
| 387 | /* ARGSUSED */ |
| 388 | static int |
| 389 | nfsmb_write_1(struct nfsmb_softc *sc, uint8_t cmd, uint8_t val, i2c_addr_t addr, |
| 390 | i2c_op_t op, int flags) |
| 391 | { |
| 392 | uint8_t data; |
| 393 | |
| 394 | /* store cmd */ |
| 395 | bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_COMMAND, cmd); |
| 396 | |
| 397 | /* store data */ |
| 398 | bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_DATA, val); |
| 399 | |
| 400 | /* write smbus slave address to register */ |
| 401 | data = addr << 1; |
| 402 | bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_ADDRESS, data); |
| 403 | |
| 404 | /* write smbus protocol to register */ |
| 405 | data = I2C_OP_READ_P(op) | NFORCE_SMB_PROTOCOL_BYTE_DATA; |
| 406 | bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_PROTOCOL, data); |
| 407 | |
| 408 | return nfsmb_check_done(sc); |
| 409 | } |
| 410 | |
| 411 | static int |
| 412 | nfsmb_write_2(struct nfsmb_softc *sc, uint8_t cmd, uint16_t val, |
| 413 | i2c_addr_t addr, i2c_op_t op, int flags) |
| 414 | { |
| 415 | uint8_t data, low, high; |
| 416 | |
| 417 | /* store cmd */ |
| 418 | bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_COMMAND, cmd); |
| 419 | |
| 420 | /* store data */ |
| 421 | low = val; |
| 422 | bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_DATA, low); |
| 423 | high = val >> 8; |
| 424 | bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_DATA + 1, high); |
| 425 | |
| 426 | /* write smbus slave address to register */ |
| 427 | data = addr << 1; |
| 428 | bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_ADDRESS, data); |
| 429 | |
| 430 | /* write smbus protocol to register */ |
| 431 | data = I2C_OP_READ_P(op) | NFORCE_SMB_PROTOCOL_WORD_DATA; |
| 432 | if (flags & I2C_F_PEC) |
| 433 | data |= NFORCE_SMB_PROTOCOL_PEC; |
| 434 | bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_PROTOCOL, data); |
| 435 | |
| 436 | return nfsmb_check_done(sc); |
| 437 | } |
| 438 | |
| 439 | /* ARGSUSED */ |
| 440 | static int |
| 441 | nfsmb_receive_1(struct nfsmb_softc *sc, i2c_addr_t addr, i2c_op_t op, int flags) |
| 442 | { |
| 443 | uint8_t data; |
| 444 | |
| 445 | /* write smbus slave address to register */ |
| 446 | data = addr << 1; |
| 447 | bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_ADDRESS, data); |
| 448 | |
| 449 | /* write smbus protocol to register */ |
| 450 | data = I2C_OP_READ_P(op) | NFORCE_SMB_PROTOCOL_BYTE; |
| 451 | bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_PROTOCOL, data); |
| 452 | |
| 453 | /* check for errors */ |
| 454 | if (nfsmb_check_done(sc) < 0) |
| 455 | return -1; |
| 456 | |
| 457 | /* read data */ |
| 458 | return bus_space_read_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_DATA); |
| 459 | } |
| 460 | |
| 461 | /* ARGSUSED */ |
| 462 | static int |
| 463 | nfsmb_read_1(struct nfsmb_softc *sc, uint8_t cmd, i2c_addr_t addr, i2c_op_t op, |
| 464 | int flags) |
| 465 | { |
| 466 | uint8_t data; |
| 467 | |
| 468 | /* store cmd */ |
| 469 | bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_COMMAND, cmd); |
| 470 | |
| 471 | /* write smbus slave address to register */ |
| 472 | data = addr << 1; |
| 473 | bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_ADDRESS, data); |
| 474 | |
| 475 | /* write smbus protocol to register */ |
| 476 | data = I2C_OP_READ_P(op) | NFORCE_SMB_PROTOCOL_BYTE_DATA; |
| 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 | return bus_space_read_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_DATA); |
| 485 | } |
| 486 | |
| 487 | static int |
| 488 | nfsmb_read_2(struct nfsmb_softc *sc, uint8_t cmd, i2c_addr_t addr, i2c_op_t op, |
| 489 | int flags) |
| 490 | { |
| 491 | uint8_t data, low, high; |
| 492 | |
| 493 | /* store cmd */ |
| 494 | bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_COMMAND, cmd); |
| 495 | |
| 496 | /* write smbus slave address to register */ |
| 497 | data = addr << 1; |
| 498 | bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_ADDRESS, data); |
| 499 | |
| 500 | /* write smbus protocol to register */ |
| 501 | data = I2C_OP_READ_P(op) | NFORCE_SMB_PROTOCOL_WORD_DATA; |
| 502 | if (flags & I2C_F_PEC) |
| 503 | data |= NFORCE_SMB_PROTOCOL_PEC; |
| 504 | bus_space_write_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_PROTOCOL, data); |
| 505 | |
| 506 | /* check for errors */ |
| 507 | if (nfsmb_check_done(sc) < 0) |
| 508 | return -1; |
| 509 | |
| 510 | /* read data */ |
| 511 | low = bus_space_read_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_DATA); |
| 512 | high = bus_space_read_1(sc->sc_iot, sc->sc_ioh, NFORCE_SMB_DATA + 1); |
| 513 | return low | high << 8; |
| 514 | } |
| 515 | |