1 /* $NetBSD: alipm.c,v 1.14 2025/09/15 13:23:03 thorpej Exp $ */ 2 /* $OpenBSD: alipm.c,v 1.13 2007/05/03 12:19:01 dlg Exp $ */ 3 4 /* 5 * Copyright (c) 2005 Mark Kettenis 6 * 7 * Permission to use, copy, modify, and distribute this software for any 8 * purpose with or without fee is hereby granted, provided that the above 9 * copyright notice and this permission notice appear in all copies. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 18 */ 19 20 #include <sys/cdefs.h> 21 __KERNEL_RCSID(0, "$NetBSD: alipm.c,v 1.14 2025/09/15 13:23:03 thorpej Exp $"); 22 23 #include <sys/param.h> 24 #include <sys/device.h> 25 #include <sys/kernel.h> 26 #include <sys/mutex.h> 27 #include <sys/proc.h> 28 #include <sys/systm.h> 29 30 #include <dev/i2c/i2cvar.h> 31 32 #include <dev/pci/pcidevs.h> 33 #include <dev/pci/pcireg.h> 34 #include <dev/pci/pcivar.h> 35 36 /* 37 * Acer Labs M7101 Power register definitions. 38 */ 39 40 /* PCI configuration registers. */ 41 #define ALIPM_CONF 0xd0 /* general configuration */ 42 #define ALIPM_CONF_SMBEN 0x0400 /* enable SMBus */ 43 #define ALIPM_BASE 0xe0 /* ACPI and SMBus base address */ 44 #define ALIPM_SMB_HOSTC 0xf0 /* host configuration */ 45 #define ALIPM_SMB_HOSTC_HSTEN 0x00000001 /* enable host controller */ 46 #define ALIPM_SMB_HOSTC_CLOCK 0x00e00000 /* clock speed */ 47 #define ALIPM_SMB_HOSTC_149K 0x00000000 /* 149 KHz clock */ 48 #define ALIPM_SMB_HOSTC_74K 0x00200000 /* 74 KHz clock */ 49 #define ALIPM_SMB_HOSTC_37K 0x00400000 /* 37 KHz clock */ 50 #define ALIPM_SMB_HOSTC_223K 0x00800000 /* 223 KHz clock */ 51 #define ALIPM_SMB_HOSTC_111K 0x00a00000 /* 111 KHz clock */ 52 #define ALIPM_SMB_HOSTC_55K 0x00c00000 /* 55 KHz clock */ 53 54 #define ALIPM_SMB_SIZE 32 /* SMBus I/O space size */ 55 56 /* SMBus I/O registers */ 57 #define ALIPM_SMB_HS 0x00 /* host status */ 58 #define ALIPM_SMB_HS_IDLE 0x04 59 #define ALIPM_SMB_HS_BUSY 0x08 /* running a command */ 60 #define ALIPM_SMB_HS_DONE 0x10 /* command completed */ 61 #define ALIPM_SMB_HS_DEVERR 0x20 /* command error */ 62 #define ALIPM_SMB_HS_BUSERR 0x40 /* transaction collision */ 63 #define ALIPM_SMB_HS_FAILED 0x80 /* failed bus transaction */ 64 #define ALIPM_SMB_HS_BITS \ 65 "\020\003IDLE\004BUSY\005DONE\006DEVERR\007BUSERR\010FAILED" 66 #define ALIPM_SMB_HC 0x01 /* host control */ 67 #define ALIPM_SMB_HC_KILL 0x04 /* kill command */ 68 #define ALIPM_SMB_HC_RESET 0x08 /* reset bus */ 69 #define ALIPM_SMB_HC_CMD_QUICK 0x00 /* QUICK command */ 70 #define ALIPM_SMB_HC_CMD_BYTE 0x10 /* BYTE command */ 71 #define ALIPM_SMB_HC_CMD_BDATA 0x20 /* BYTE DATA command */ 72 #define ALIPM_SMB_HC_CMD_WDATA 0x30 /* WORD DATA command */ 73 #define ALIPM_SMB_HC_CMD_BLOCK 0x40 /* BLOCK command */ 74 #define ALIPM_SMB_START 0x02 /* start command */ 75 #define ALIPM_SMB_TXSLVA 0x03 /* transmit slave address */ 76 #define ALIPM_SMB_TXSLVA_READ (1 << 0) /* read direction */ 77 #define ALIPM_SMB_TXSLVA_ADDR(x) (((x) & 0x7f) << 1) /* 7-bit address */ 78 #define ALIPM_SMB_HD0 0x04 /* host data 0 */ 79 #define ALIPM_SMB_HD1 0x05 /* host data 1 */ 80 #define ALIPM_SMB_HBDB 0x06 /* host block data byte */ 81 #define ALIPM_SMB_HCMD 0x07 /* host command */ 82 83 /* 84 * Newer chips have a more standard, but different PCI configuration 85 * register layout. 86 */ 87 88 #define ALIPM_SMB_BASE 0x14 /* SMBus base address */ 89 #define ALIPM_SMB_HOSTX 0xe0 /* host configuration */ 90 91 #ifdef ALIPM_DEBUG 92 #define DPRINTF(x) printf x 93 #else 94 #define DPRINTF(x) 95 #endif 96 97 #define ALIPM_DELAY 100 98 #define ALIPM_TIMEOUT 1 99 100 struct alipm_softc { 101 device_t sc_dev; 102 103 bus_space_tag_t sc_iot; 104 bus_space_handle_t sc_ioh; 105 106 struct i2c_controller sc_smb_tag; 107 }; 108 109 static int alipm_match(device_t, cfdata_t, void *); 110 static void alipm_attach(device_t, device_t, void *); 111 112 int alipm_smb_acquire_bus(void *, int); 113 void alipm_smb_release_bus(void *, int); 114 int alipm_smb_exec(void *, i2c_op_t, i2c_addr_t, const void *, 115 size_t, void *, size_t, int); 116 117 CFATTACH_DECL_NEW(alipm, sizeof(struct alipm_softc), 118 alipm_match, alipm_attach, NULL, NULL); 119 120 static int 121 alipm_match(device_t parent, cfdata_t match, void *aux) 122 { 123 struct pci_attach_args *pa = aux; 124 125 if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_ALI && 126 (PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_ALI_M7101)) 127 return (1); 128 return (0); 129 } 130 131 static void 132 alipm_attach(device_t parent, device_t self, void *aux) 133 { 134 struct alipm_softc *sc = device_private(self); 135 struct pci_attach_args *pa = aux; 136 pcireg_t iobase, reg; 137 bus_size_t iosize = ALIPM_SMB_SIZE; 138 139 sc->sc_dev = self; 140 141 /* Old chips don't have the PCI 2.2 Capabilities List. */ 142 reg = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG); 143 if ((reg & PCI_STATUS_CAPLIST_SUPPORT) == 0) { 144 /* Map I/O space */ 145 iobase = pci_conf_read(pa->pa_pc, pa->pa_tag, ALIPM_BASE); 146 sc->sc_iot = pa->pa_iot; 147 if (iobase == 0 || 148 bus_space_map(sc->sc_iot, iobase >> 16, 149 iosize, 0, &sc->sc_ioh)) { 150 aprint_error_dev(sc->sc_dev, "can't map I/O space\n"); 151 return; 152 } 153 154 reg = pci_conf_read(pa->pa_pc, pa->pa_tag, ALIPM_CONF); 155 if ((reg & ALIPM_CONF_SMBEN) == 0) { 156 aprint_error_dev(sc->sc_dev, "SMBus disabled\n"); 157 goto fail; 158 } 159 160 reg = pci_conf_read(pa->pa_pc, pa->pa_tag, ALIPM_SMB_HOSTC); 161 if ((reg & ALIPM_SMB_HOSTC_HSTEN) == 0) { 162 aprint_error_dev(sc->sc_dev, "SMBus host disabled\n"); 163 goto fail; 164 } 165 } else { 166 /* Map I/O space */ 167 if (pci_mapreg_map(pa, ALIPM_SMB_BASE, PCI_MAPREG_TYPE_IO, 0, 168 &sc->sc_iot, &sc->sc_ioh, NULL, &iosize)) { 169 aprint_error_dev(sc->sc_dev, "can't map I/O space\n"); 170 return; 171 } 172 173 reg = pci_conf_read(pa->pa_pc, pa->pa_tag, ALIPM_SMB_HOSTX); 174 if ((reg & ALIPM_SMB_HOSTC_HSTEN) == 0) { 175 aprint_error_dev(sc->sc_dev, "SMBus host disabled\n"); 176 goto fail; 177 } 178 } 179 180 switch (reg & ALIPM_SMB_HOSTC_CLOCK) { 181 case ALIPM_SMB_HOSTC_149K: 182 aprint_normal(": 149KHz clock\n"); 183 break; 184 case ALIPM_SMB_HOSTC_74K: 185 aprint_normal(": 74KHz clock\n"); 186 break; 187 case ALIPM_SMB_HOSTC_37K: 188 aprint_normal(": 37KHz clock\n"); 189 break; 190 case ALIPM_SMB_HOSTC_223K: 191 aprint_normal(": 223KHz clock\n"); 192 break; 193 case ALIPM_SMB_HOSTC_111K: 194 aprint_normal(": 111KHz clock\n"); 195 break; 196 case ALIPM_SMB_HOSTC_55K: 197 aprint_normal(": 55KHz clock\n"); 198 break; 199 default: 200 aprint_normal(" unknown clock speed\n"); 201 break; 202 } 203 aprint_naive("\n"); 204 205 /* Attach I2C bus */ 206 iic_tag_init(&sc->sc_smb_tag); 207 sc->sc_smb_tag.ic_cookie = sc; 208 sc->sc_smb_tag.ic_exec = alipm_smb_exec; 209 210 iicbus_attach(sc->sc_dev, &sc->sc_smb_tag); 211 212 return; 213 214 fail: 215 bus_space_unmap(sc->sc_iot, sc->sc_ioh, iosize); 216 } 217 218 int 219 alipm_smb_exec(void *cookie, i2c_op_t op, i2c_addr_t addr, 220 const void *cmdbuf, size_t cmdlen, void *buf, size_t len, int flags) 221 { 222 struct alipm_softc *sc = cookie; 223 u_int8_t *b; 224 u_int8_t ctl, st; 225 int retries, error = 0; 226 227 DPRINTF(("%s: exec op %d, addr 0x%x, cmdlen %d, len %d, " 228 "flags 0x%x\n", device_xname(sc->sc_dev), op, addr, cmdlen, 229 len, flags)); 230 231 if (!I2C_OP_STOP_P(op) || cmdlen > 1 || len > 2 || 232 (cmdlen == 0 && len > 1)) 233 return (EOPNOTSUPP); 234 235 /* Clear status bits */ 236 bus_space_write_1(sc->sc_iot, sc->sc_ioh, ALIPM_SMB_HS, 237 ALIPM_SMB_HS_DONE | ALIPM_SMB_HS_FAILED | 238 ALIPM_SMB_HS_BUSERR | ALIPM_SMB_HS_DEVERR); 239 bus_space_barrier(sc->sc_iot, sc->sc_ioh, ALIPM_SMB_HS, 1, 240 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 241 242 /* Wait until bus is idle */ 243 for (retries = 1000; retries > 0; retries--) { 244 st = bus_space_read_1(sc->sc_iot, sc->sc_ioh, ALIPM_SMB_HS); 245 bus_space_barrier(sc->sc_iot, sc->sc_ioh, ALIPM_SMB_HS, 1, 246 BUS_SPACE_BARRIER_READ); 247 if (st & (ALIPM_SMB_HS_IDLE | ALIPM_SMB_HS_FAILED | 248 ALIPM_SMB_HS_BUSERR | ALIPM_SMB_HS_DEVERR)) 249 break; 250 DELAY(ALIPM_DELAY); 251 } 252 if (retries == 0) { 253 aprint_error_dev(sc->sc_dev, "timeout st 0x%x\n", st); 254 return (ETIMEDOUT); 255 } 256 if (st & (ALIPM_SMB_HS_FAILED | 257 ALIPM_SMB_HS_BUSERR | ALIPM_SMB_HS_DEVERR)) { 258 aprint_error_dev(sc->sc_dev, "error st 0x%x\n", st); 259 return (EIO); 260 } 261 262 /* Set slave address and transfer direction. */ 263 bus_space_write_1(sc->sc_iot, sc->sc_ioh, ALIPM_SMB_TXSLVA, 264 ALIPM_SMB_TXSLVA_ADDR(addr) | 265 (I2C_OP_READ_P(op) ? ALIPM_SMB_TXSLVA_READ : 0)); 266 267 if (cmdlen > 0) 268 /* Set command byte */ 269 bus_space_write_1(sc->sc_iot, sc->sc_ioh, 270 ALIPM_SMB_HCMD, ((const u_int8_t *)cmdbuf)[0]); 271 272 if (I2C_OP_WRITE_P(op)) { 273 /* Write data. */ 274 b = buf; 275 if (cmdlen == 0 && len == 1) 276 bus_space_write_1(sc->sc_iot, sc->sc_ioh, 277 ALIPM_SMB_HCMD, b[0]); 278 else if (len > 0) 279 bus_space_write_1(sc->sc_iot, sc->sc_ioh, 280 ALIPM_SMB_HD0, b[0]); 281 if (len > 1) 282 bus_space_write_1(sc->sc_iot, sc->sc_ioh, 283 ALIPM_SMB_HD1, b[1]); 284 } 285 286 /* Set SMBus command */ 287 if (cmdlen == 0) { 288 if (len == 0) 289 ctl = ALIPM_SMB_HC_CMD_QUICK; 290 else 291 ctl = ALIPM_SMB_HC_CMD_BYTE; 292 } else if (len == 1) 293 ctl = ALIPM_SMB_HC_CMD_BDATA; 294 else 295 ctl = ALIPM_SMB_HC_CMD_WDATA; 296 bus_space_write_1(sc->sc_iot, sc->sc_ioh, ALIPM_SMB_HC, ctl); 297 298 /* Start transaction */ 299 bus_space_barrier(sc->sc_iot, sc->sc_ioh, 0, ALIPM_SMB_SIZE, 300 BUS_SPACE_BARRIER_WRITE); 301 bus_space_write_1(sc->sc_iot, sc->sc_ioh, ALIPM_SMB_START, 0xff); 302 bus_space_barrier(sc->sc_iot, sc->sc_ioh, 0, ALIPM_SMB_SIZE, 303 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 304 305 /* Poll for completion */ 306 DELAY(ALIPM_DELAY); 307 for (retries = 1000; retries > 0; retries--) { 308 st = bus_space_read_1(sc->sc_iot, sc->sc_ioh, ALIPM_SMB_HS); 309 bus_space_barrier(sc->sc_iot, sc->sc_ioh, ALIPM_SMB_HS, 1, 310 BUS_SPACE_BARRIER_READ); 311 if (st & (ALIPM_SMB_HS_IDLE | ALIPM_SMB_HS_FAILED | 312 ALIPM_SMB_HS_BUSERR | ALIPM_SMB_HS_DEVERR)) 313 break; 314 DELAY(ALIPM_DELAY); 315 } 316 if (retries == 0) { 317 aprint_error_dev(sc->sc_dev, "timeout st 0x%x, resetting\n",st); 318 bus_space_write_1(sc->sc_iot, sc->sc_ioh, ALIPM_SMB_HC, 319 ALIPM_SMB_HC_RESET); 320 bus_space_barrier(sc->sc_iot, sc->sc_ioh, 0, ALIPM_SMB_SIZE, 321 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 322 st = bus_space_read_1(sc->sc_iot, sc->sc_ioh, ALIPM_SMB_HS); 323 bus_space_barrier(sc->sc_iot, sc->sc_ioh, ALIPM_SMB_HS, 1, 324 BUS_SPACE_BARRIER_READ); 325 error = ETIMEDOUT; 326 goto done; 327 } 328 329 if ((st & ALIPM_SMB_HS_DONE) == 0) { 330 bus_space_write_1(sc->sc_iot, sc->sc_ioh, ALIPM_SMB_HC, 331 ALIPM_SMB_HC_KILL); 332 bus_space_barrier(sc->sc_iot, sc->sc_ioh, 0, ALIPM_SMB_SIZE, 333 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 334 st = bus_space_read_1(sc->sc_iot, sc->sc_ioh, ALIPM_SMB_HS); 335 bus_space_barrier(sc->sc_iot, sc->sc_ioh, ALIPM_SMB_HS, 1, 336 BUS_SPACE_BARRIER_READ); 337 if ((st & ALIPM_SMB_HS_FAILED) == 0) 338 aprint_error_dev(sc->sc_dev, "error st 0x%x\n", st); 339 } 340 341 /* Check for errors */ 342 if (st & (ALIPM_SMB_HS_FAILED | 343 ALIPM_SMB_HS_BUSERR | ALIPM_SMB_HS_DEVERR)) { 344 error = EIO; 345 goto done; 346 } 347 348 if (I2C_OP_READ_P(op)) { 349 /* Read data */ 350 b = buf; 351 if (len > 0) { 352 b[0] = bus_space_read_1(sc->sc_iot, sc->sc_ioh, 353 ALIPM_SMB_HD0); 354 bus_space_barrier(sc->sc_iot, sc->sc_ioh, 355 ALIPM_SMB_HD0, 1, BUS_SPACE_BARRIER_READ); 356 } 357 if (len > 1) { 358 b[1] = bus_space_read_1(sc->sc_iot, sc->sc_ioh, 359 ALIPM_SMB_HD1); 360 bus_space_barrier(sc->sc_iot, sc->sc_ioh, 361 ALIPM_SMB_HD1, 1, BUS_SPACE_BARRIER_READ); 362 } 363 } 364 365 done: 366 /* Clear status bits */ 367 bus_space_write_1(sc->sc_iot, sc->sc_ioh, ALIPM_SMB_HS, st); 368 369 return (error); 370 } 371
Indexes created Tue Sep 23 20:09:58 GMT 2025