piixpm.c revision 1.2.10.2
1 1.2.10.2 kardel /* $NetBSD: piixpm.c,v 1.2.10.2 2006/06/01 22:36:49 kardel Exp $ */ 2 1.2.10.2 kardel /* $OpenBSD: piixpm.c,v 1.20 2006/02/27 08:25:02 grange Exp $ */ 3 1.2.10.2 kardel 4 1.2.10.2 kardel /* 5 1.2.10.2 kardel * Copyright (c) 2005, 2006 Alexander Yurchenko <grange (at) openbsd.org> 6 1.2.10.2 kardel * 7 1.2.10.2 kardel * Permission to use, copy, modify, and distribute this software for any 8 1.2.10.2 kardel * purpose with or without fee is hereby granted, provided that the above 9 1.2.10.2 kardel * copyright notice and this permission notice appear in all copies. 10 1.2.10.2 kardel * 11 1.2.10.2 kardel * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 12 1.2.10.2 kardel * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 13 1.2.10.2 kardel * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 14 1.2.10.2 kardel * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 15 1.2.10.2 kardel * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 16 1.2.10.2 kardel * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 17 1.2.10.2 kardel * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 18 1.2.10.2 kardel */ 19 1.2.10.2 kardel 20 1.2.10.2 kardel /* 21 1.2.10.2 kardel * Intel PIIX and compatible Power Management controller driver. 22 1.2.10.2 kardel */ 23 1.2.10.2 kardel 24 1.2.10.2 kardel #include <sys/cdefs.h> 25 1.2.10.2 kardel __KERNEL_RCSID(0, "$NetBSD: piixpm.c,v 1.2.10.2 2006/06/01 22:36:49 kardel Exp $"); 26 1.2.10.2 kardel 27 1.2.10.2 kardel #include <sys/param.h> 28 1.2.10.2 kardel #include <sys/systm.h> 29 1.2.10.2 kardel #include <sys/device.h> 30 1.2.10.2 kardel #include <sys/kernel.h> 31 1.2.10.2 kardel #include <sys/lock.h> 32 1.2.10.2 kardel #include <sys/proc.h> 33 1.2.10.2 kardel 34 1.2.10.2 kardel #include <machine/bus.h> 35 1.2.10.2 kardel 36 1.2.10.2 kardel #include <dev/pci/pcidevs.h> 37 1.2.10.2 kardel #include <dev/pci/pcireg.h> 38 1.2.10.2 kardel #include <dev/pci/pcivar.h> 39 1.2.10.2 kardel 40 1.2.10.2 kardel #include <dev/pci/piixpmreg.h> 41 1.2.10.2 kardel 42 1.2.10.2 kardel #include <dev/i2c/i2cvar.h> 43 1.2.10.2 kardel 44 1.2.10.2 kardel #ifdef PIIXPM_DEBUG 45 1.2.10.2 kardel #define DPRINTF(x) printf x 46 1.2.10.2 kardel #else 47 1.2.10.2 kardel #define DPRINTF(x) 48 1.2.10.2 kardel #endif 49 1.2.10.2 kardel 50 1.2.10.2 kardel #define PIIXPM_DELAY 200 51 1.2.10.2 kardel #define PIIXPM_TIMEOUT 1 52 1.2.10.2 kardel 53 1.2.10.2 kardel struct piixpm_softc { 54 1.2.10.2 kardel struct device sc_dev; 55 1.2.10.2 kardel 56 1.2.10.2 kardel bus_space_tag_t sc_iot; 57 1.2.10.2 kardel bus_space_handle_t sc_ioh; 58 1.2.10.2 kardel void * sc_ih; 59 1.2.10.2 kardel int sc_poll; 60 1.2.10.2 kardel 61 1.2.10.2 kardel struct i2c_controller sc_i2c_tag; 62 1.2.10.2 kardel struct lock sc_i2c_lock; 63 1.2.10.2 kardel struct { 64 1.2.10.2 kardel i2c_op_t op; 65 1.2.10.2 kardel void * buf; 66 1.2.10.2 kardel size_t len; 67 1.2.10.2 kardel int flags; 68 1.2.10.2 kardel volatile int error; 69 1.2.10.2 kardel } sc_i2c_xfer; 70 1.2.10.2 kardel }; 71 1.2.10.2 kardel 72 1.2.10.2 kardel int piixpm_match(struct device *, struct cfdata *, void *); 73 1.2.10.2 kardel void piixpm_attach(struct device *, struct device *, void *); 74 1.2.10.2 kardel 75 1.2.10.2 kardel int piixpm_i2c_acquire_bus(void *, int); 76 1.2.10.2 kardel void piixpm_i2c_release_bus(void *, int); 77 1.2.10.2 kardel int piixpm_i2c_exec(void *, i2c_op_t, i2c_addr_t, const void *, size_t, 78 1.2.10.2 kardel void *, size_t, int); 79 1.2.10.2 kardel 80 1.2.10.2 kardel int piixpm_intr(void *); 81 1.2.10.2 kardel 82 1.2.10.2 kardel CFATTACH_DECL(piixpm, sizeof(struct piixpm_softc), 83 1.2.10.2 kardel piixpm_match, piixpm_attach, NULL, NULL); 84 1.2.10.2 kardel 85 1.2.10.2 kardel int 86 1.2.10.2 kardel piixpm_match(struct device *parent, struct cfdata *match, void *aux) 87 1.2.10.2 kardel { 88 1.2.10.2 kardel struct pci_attach_args *pa; 89 1.2.10.2 kardel 90 1.2.10.2 kardel pa = (struct pci_attach_args *)aux; 91 1.2.10.2 kardel switch (PCI_VENDOR(pa->pa_id)) { 92 1.2.10.2 kardel case PCI_VENDOR_INTEL: 93 1.2.10.2 kardel switch (PCI_PRODUCT(pa->pa_id)) { 94 1.2.10.2 kardel case PCI_PRODUCT_INTEL_82371AB_PMC: 95 1.2.10.2 kardel case PCI_PRODUCT_INTEL_82440MX_PMC: 96 1.2.10.2 kardel return 1; 97 1.2.10.2 kardel } 98 1.2.10.2 kardel break; 99 1.2.10.2 kardel case PCI_VENDOR_ATI: 100 1.2.10.2 kardel switch (PCI_PRODUCT(pa->pa_id)) { 101 1.2.10.2 kardel case PCI_PRODUCT_ATI_SB200_SMB: 102 1.2.10.2 kardel return 1; 103 1.2.10.2 kardel } 104 1.2.10.2 kardel break; 105 1.2.10.2 kardel } 106 1.2.10.2 kardel 107 1.2.10.2 kardel return 0; 108 1.2.10.2 kardel } 109 1.2.10.2 kardel 110 1.2.10.2 kardel void 111 1.2.10.2 kardel piixpm_attach(struct device *parent, struct device *self, void *aux) 112 1.2.10.2 kardel { 113 1.2.10.2 kardel struct piixpm_softc *sc = (struct piixpm_softc *)self; 114 1.2.10.2 kardel struct pci_attach_args *pa = aux; 115 1.2.10.2 kardel struct i2cbus_attach_args iba; 116 1.2.10.2 kardel pcireg_t base, conf; 117 1.2.10.2 kardel pci_intr_handle_t ih; 118 1.2.10.2 kardel const char *intrstr = NULL; 119 1.2.10.2 kardel 120 1.2.10.2 kardel /* Read configuration */ 121 1.2.10.2 kardel conf = pci_conf_read(pa->pa_pc, pa->pa_tag, PIIX_SMB_HOSTC); 122 1.2.10.2 kardel DPRINTF((": conf 0x%x", conf)); 123 1.2.10.2 kardel 124 1.2.10.2 kardel if ((conf & PIIX_SMB_HOSTC_HSTEN) == 0) { 125 1.2.10.2 kardel printf(": SMBus disabled\n"); 126 1.2.10.2 kardel return; 127 1.2.10.2 kardel } 128 1.2.10.2 kardel 129 1.2.10.2 kardel /* Map I/O space */ 130 1.2.10.2 kardel sc->sc_iot = pa->pa_iot; 131 1.2.10.2 kardel base = pci_conf_read(pa->pa_pc, pa->pa_tag, PIIX_SMB_BASE) & 0xffff; 132 1.2.10.2 kardel if (bus_space_map(sc->sc_iot, PCI_MAPREG_IO_ADDR(base), 133 1.2.10.2 kardel PIIX_SMB_SIZE, 0, &sc->sc_ioh)) { 134 1.2.10.2 kardel printf(": can't map I/O space\n"); 135 1.2.10.2 kardel return; 136 1.2.10.2 kardel } 137 1.2.10.2 kardel 138 1.2.10.2 kardel sc->sc_poll = 1; 139 1.2.10.2 kardel if ((conf & PIIX_SMB_HOSTC_INTMASK) == PIIX_SMB_HOSTC_SMI) { 140 1.2.10.2 kardel /* No PCI IRQ */ 141 1.2.10.2 kardel printf(": SMI"); 142 1.2.10.2 kardel } else if ((conf & PIIX_SMB_HOSTC_INTMASK) == PIIX_SMB_HOSTC_IRQ) { 143 1.2.10.2 kardel /* Install interrupt handler */ 144 1.2.10.2 kardel if (pci_intr_map(pa, &ih) == 0) { 145 1.2.10.2 kardel intrstr = pci_intr_string(pa->pa_pc, ih); 146 1.2.10.2 kardel sc->sc_ih = pci_intr_establish(pa->pa_pc, ih, IPL_BIO, 147 1.2.10.2 kardel piixpm_intr, sc); 148 1.2.10.2 kardel if (sc->sc_ih != NULL) { 149 1.2.10.2 kardel printf(": %s", intrstr); 150 1.2.10.2 kardel sc->sc_poll = 0; 151 1.2.10.2 kardel } 152 1.2.10.2 kardel } 153 1.2.10.2 kardel if (sc->sc_poll) 154 1.2.10.2 kardel printf(": polling"); 155 1.2.10.2 kardel } 156 1.2.10.2 kardel 157 1.2.10.2 kardel printf("\n"); 158 1.2.10.2 kardel 159 1.2.10.2 kardel /* Attach I2C bus */ 160 1.2.10.2 kardel lockinit(&sc->sc_i2c_lock, PRIBIO | PCATCH, "iiclk", 0, 0); 161 1.2.10.2 kardel sc->sc_i2c_tag.ic_cookie = sc; 162 1.2.10.2 kardel sc->sc_i2c_tag.ic_acquire_bus = piixpm_i2c_acquire_bus; 163 1.2.10.2 kardel sc->sc_i2c_tag.ic_release_bus = piixpm_i2c_release_bus; 164 1.2.10.2 kardel sc->sc_i2c_tag.ic_exec = piixpm_i2c_exec; 165 1.2.10.2 kardel 166 1.2.10.2 kardel bzero(&iba, sizeof(iba)); 167 1.2.10.2 kardel iba.iba_name = "iic"; 168 1.2.10.2 kardel iba.iba_tag = &sc->sc_i2c_tag; 169 1.2.10.2 kardel config_found(self, &iba, iicbus_print); 170 1.2.10.2 kardel 171 1.2.10.2 kardel return; 172 1.2.10.2 kardel } 173 1.2.10.2 kardel 174 1.2.10.2 kardel int 175 1.2.10.2 kardel piixpm_i2c_acquire_bus(void *cookie, int flags) 176 1.2.10.2 kardel { 177 1.2.10.2 kardel struct piixpm_softc *sc = cookie; 178 1.2.10.2 kardel 179 1.2.10.2 kardel if (cold || sc->sc_poll || (flags & I2C_F_POLL)) 180 1.2.10.2 kardel return (0); 181 1.2.10.2 kardel 182 1.2.10.2 kardel return (lockmgr(&sc->sc_i2c_lock, LK_EXCLUSIVE, NULL)); 183 1.2.10.2 kardel } 184 1.2.10.2 kardel 185 1.2.10.2 kardel void 186 1.2.10.2 kardel piixpm_i2c_release_bus(void *cookie, int flags) 187 1.2.10.2 kardel { 188 1.2.10.2 kardel struct piixpm_softc *sc = cookie; 189 1.2.10.2 kardel 190 1.2.10.2 kardel if (cold || sc->sc_poll || (flags & I2C_F_POLL)) 191 1.2.10.2 kardel return; 192 1.2.10.2 kardel 193 1.2.10.2 kardel lockmgr(&sc->sc_i2c_lock, LK_RELEASE, NULL); 194 1.2.10.2 kardel } 195 1.2.10.2 kardel 196 1.2.10.2 kardel int 197 1.2.10.2 kardel piixpm_i2c_exec(void *cookie, i2c_op_t op, i2c_addr_t addr, 198 1.2.10.2 kardel const void *cmdbuf, size_t cmdlen, void *buf, size_t len, int flags) 199 1.2.10.2 kardel { 200 1.2.10.2 kardel struct piixpm_softc *sc = cookie; 201 1.2.10.2 kardel const u_int8_t *b; 202 1.2.10.2 kardel u_int8_t ctl = 0, st; 203 1.2.10.2 kardel int retries; 204 1.2.10.2 kardel 205 1.2.10.2 kardel DPRINTF(("%s: exec: op %d, addr 0x%x, cmdlen %d, len %d, flags 0x%x\n", 206 1.2.10.2 kardel sc->sc_dev.dv_xname, op, addr, cmdlen, len, flags)); 207 1.2.10.2 kardel 208 1.2.10.2 kardel /* Wait for bus to be idle */ 209 1.2.10.2 kardel for (retries = 100; retries > 0; retries--) { 210 1.2.10.2 kardel st = bus_space_read_1(sc->sc_iot, sc->sc_ioh, PIIX_SMB_HS); 211 1.2.10.2 kardel if (!(st & PIIX_SMB_HS_BUSY)) 212 1.2.10.2 kardel break; 213 1.2.10.2 kardel DELAY(PIIXPM_DELAY); 214 1.2.10.2 kardel } 215 1.2.10.2 kardel DPRINTF(("%s: exec: st 0x%b\n", sc->sc_dev.dv_xname, st, 216 1.2.10.2 kardel PIIX_SMB_HS_BITS)); 217 1.2.10.2 kardel if (st & PIIX_SMB_HS_BUSY) 218 1.2.10.2 kardel return (1); 219 1.2.10.2 kardel 220 1.2.10.2 kardel if (cold || sc->sc_poll) 221 1.2.10.2 kardel flags |= I2C_F_POLL; 222 1.2.10.2 kardel 223 1.2.10.2 kardel if (!I2C_OP_STOP_P(op) || cmdlen > 1 || len > 2) 224 1.2.10.2 kardel return (1); 225 1.2.10.2 kardel 226 1.2.10.2 kardel /* Setup transfer */ 227 1.2.10.2 kardel sc->sc_i2c_xfer.op = op; 228 1.2.10.2 kardel sc->sc_i2c_xfer.buf = buf; 229 1.2.10.2 kardel sc->sc_i2c_xfer.len = len; 230 1.2.10.2 kardel sc->sc_i2c_xfer.flags = flags; 231 1.2.10.2 kardel sc->sc_i2c_xfer.error = 0; 232 1.2.10.2 kardel 233 1.2.10.2 kardel /* Set slave address and transfer direction */ 234 1.2.10.2 kardel bus_space_write_1(sc->sc_iot, sc->sc_ioh, PIIX_SMB_TXSLVA, 235 1.2.10.2 kardel PIIX_SMB_TXSLVA_ADDR(addr) | 236 1.2.10.2 kardel (I2C_OP_READ_P(op) ? PIIX_SMB_TXSLVA_READ : 0)); 237 1.2.10.2 kardel 238 1.2.10.2 kardel b = cmdbuf; 239 1.2.10.2 kardel if (cmdlen > 0) 240 1.2.10.2 kardel /* Set command byte */ 241 1.2.10.2 kardel bus_space_write_1(sc->sc_iot, sc->sc_ioh, PIIX_SMB_HCMD, b[0]); 242 1.2.10.2 kardel 243 1.2.10.2 kardel if (I2C_OP_WRITE_P(op)) { 244 1.2.10.2 kardel /* Write data */ 245 1.2.10.2 kardel b = buf; 246 1.2.10.2 kardel if (len > 0) 247 1.2.10.2 kardel bus_space_write_1(sc->sc_iot, sc->sc_ioh, 248 1.2.10.2 kardel PIIX_SMB_HD0, b[0]); 249 1.2.10.2 kardel if (len > 1) 250 1.2.10.2 kardel bus_space_write_1(sc->sc_iot, sc->sc_ioh, 251 1.2.10.2 kardel PIIX_SMB_HD1, b[1]); 252 1.2.10.2 kardel } 253 1.2.10.2 kardel 254 1.2.10.2 kardel /* Set SMBus command */ 255 1.2.10.2 kardel if (len == 0) 256 1.2.10.2 kardel ctl = PIIX_SMB_HC_CMD_BYTE; 257 1.2.10.2 kardel else if (len == 1) 258 1.2.10.2 kardel ctl = PIIX_SMB_HC_CMD_BDATA; 259 1.2.10.2 kardel else if (len == 2) 260 1.2.10.2 kardel ctl = PIIX_SMB_HC_CMD_WDATA; 261 1.2.10.2 kardel 262 1.2.10.2 kardel if ((flags & I2C_F_POLL) == 0) 263 1.2.10.2 kardel ctl |= PIIX_SMB_HC_INTREN; 264 1.2.10.2 kardel 265 1.2.10.2 kardel /* Start transaction */ 266 1.2.10.2 kardel ctl |= PIIX_SMB_HC_START; 267 1.2.10.2 kardel bus_space_write_1(sc->sc_iot, sc->sc_ioh, PIIX_SMB_HC, ctl); 268 1.2.10.2 kardel 269 1.2.10.2 kardel if (flags & I2C_F_POLL) { 270 1.2.10.2 kardel /* Poll for completion */ 271 1.2.10.2 kardel DELAY(PIIXPM_DELAY); 272 1.2.10.2 kardel for (retries = 1000; retries > 0; retries--) { 273 1.2.10.2 kardel st = bus_space_read_1(sc->sc_iot, sc->sc_ioh, 274 1.2.10.2 kardel PIIX_SMB_HS); 275 1.2.10.2 kardel if ((st & PIIX_SMB_HS_BUSY) == 0) 276 1.2.10.2 kardel break; 277 1.2.10.2 kardel DELAY(PIIXPM_DELAY); 278 1.2.10.2 kardel } 279 1.2.10.2 kardel if (st & PIIX_SMB_HS_BUSY) 280 1.2.10.2 kardel goto timeout; 281 1.2.10.2 kardel piixpm_intr(sc); 282 1.2.10.2 kardel } else { 283 1.2.10.2 kardel /* Wait for interrupt */ 284 1.2.10.2 kardel if (tsleep(sc, PRIBIO, "iicexec", PIIXPM_TIMEOUT * hz)) 285 1.2.10.2 kardel goto timeout; 286 1.2.10.2 kardel } 287 1.2.10.2 kardel 288 1.2.10.2 kardel if (sc->sc_i2c_xfer.error) 289 1.2.10.2 kardel return (1); 290 1.2.10.2 kardel 291 1.2.10.2 kardel return (0); 292 1.2.10.2 kardel 293 1.2.10.2 kardel timeout: 294 1.2.10.2 kardel /* 295 1.2.10.2 kardel * Transfer timeout. Kill the transaction and clear status bits. 296 1.2.10.2 kardel */ 297 1.2.10.2 kardel printf("%s: timeout, status 0x%x\n", sc->sc_dev.dv_xname, st); 298 1.2.10.2 kardel bus_space_write_1(sc->sc_iot, sc->sc_ioh, PIIX_SMB_HC, 299 1.2.10.2 kardel PIIX_SMB_HC_KILL); 300 1.2.10.2 kardel DELAY(PIIXPM_DELAY); 301 1.2.10.2 kardel st = bus_space_read_1(sc->sc_iot, sc->sc_ioh, PIIX_SMB_HS); 302 1.2.10.2 kardel if ((st & PIIX_SMB_HS_FAILED) == 0) 303 1.2.10.2 kardel printf("%s: transaction abort failed, status 0x%x\n", 304 1.2.10.2 kardel sc->sc_dev.dv_xname, st); 305 1.2.10.2 kardel bus_space_write_1(sc->sc_iot, sc->sc_ioh, PIIX_SMB_HS, st); 306 1.2.10.2 kardel return (1); 307 1.2.10.2 kardel } 308 1.2.10.2 kardel 309 1.2.10.2 kardel int 310 1.2.10.2 kardel piixpm_intr(void *arg) 311 1.2.10.2 kardel { 312 1.2.10.2 kardel struct piixpm_softc *sc = arg; 313 1.2.10.2 kardel u_int8_t st; 314 1.2.10.2 kardel u_int8_t *b; 315 1.2.10.2 kardel size_t len; 316 1.2.10.2 kardel 317 1.2.10.2 kardel /* Read status */ 318 1.2.10.2 kardel st = bus_space_read_1(sc->sc_iot, sc->sc_ioh, PIIX_SMB_HS); 319 1.2.10.2 kardel if ((st & PIIX_SMB_HS_BUSY) != 0 || (st & (PIIX_SMB_HS_INTR | 320 1.2.10.2 kardel PIIX_SMB_HS_DEVERR | PIIX_SMB_HS_BUSERR | 321 1.2.10.2 kardel PIIX_SMB_HS_FAILED)) == 0) 322 1.2.10.2 kardel /* Interrupt was not for us */ 323 1.2.10.2 kardel return (0); 324 1.2.10.2 kardel 325 1.2.10.2 kardel DPRINTF(("%s: intr st 0x%b\n", sc->sc_dev.dv_xname, st, 326 1.2.10.2 kardel PIIX_SMB_HS_BITS)); 327 1.2.10.2 kardel 328 1.2.10.2 kardel /* Clear status bits */ 329 1.2.10.2 kardel bus_space_write_1(sc->sc_iot, sc->sc_ioh, PIIX_SMB_HS, st); 330 1.2.10.2 kardel 331 1.2.10.2 kardel /* Check for errors */ 332 1.2.10.2 kardel if (st & (PIIX_SMB_HS_DEVERR | PIIX_SMB_HS_BUSERR | 333 1.2.10.2 kardel PIIX_SMB_HS_FAILED)) { 334 1.2.10.2 kardel sc->sc_i2c_xfer.error = 1; 335 1.2.10.2 kardel goto done; 336 1.2.10.2 kardel } 337 1.2.10.2 kardel 338 1.2.10.2 kardel if (st & PIIX_SMB_HS_INTR) { 339 1.2.10.2 kardel if (I2C_OP_WRITE_P(sc->sc_i2c_xfer.op)) 340 1.2.10.2 kardel goto done; 341 1.2.10.2 kardel 342 1.2.10.2 kardel /* Read data */ 343 1.2.10.2 kardel b = sc->sc_i2c_xfer.buf; 344 1.2.10.2 kardel len = sc->sc_i2c_xfer.len; 345 1.2.10.2 kardel if (len > 0) 346 1.2.10.2 kardel b[0] = bus_space_read_1(sc->sc_iot, sc->sc_ioh, 347 1.2.10.2 kardel PIIX_SMB_HD0); 348 1.2.10.2 kardel if (len > 1) 349 1.2.10.2 kardel b[1] = bus_space_read_1(sc->sc_iot, sc->sc_ioh, 350 1.2.10.2 kardel PIIX_SMB_HD1); 351 1.2.10.2 kardel } 352 1.2.10.2 kardel 353 1.2.10.2 kardel done: 354 1.2.10.2 kardel if ((sc->sc_i2c_xfer.flags & I2C_F_POLL) == 0) 355 1.2.10.2 kardel wakeup(sc); 356 1.2.10.2 kardel return (1); 357 1.2.10.2 kardel } 358
Indexes created Thu Oct 02 01:09:59 GMT 2025