alipm.c revision 1.3.2.2
1 1.3.2.2 yamt /* $NetBSD: alipm.c,v 1.3.2.2 2009/05/04 08:12:54 yamt Exp $ */ 2 1.3.2.2 yamt /* $OpenBSD: alipm.c,v 1.13 2007/05/03 12:19:01 dlg Exp $ */ 3 1.3.2.2 yamt 4 1.3.2.2 yamt /* 5 1.3.2.2 yamt * Copyright (c) 2005 Mark Kettenis 6 1.3.2.2 yamt * 7 1.3.2.2 yamt * Permission to use, copy, modify, and distribute this software for any 8 1.3.2.2 yamt * purpose with or without fee is hereby granted, provided that the above 9 1.3.2.2 yamt * copyright notice and this permission notice appear in all copies. 10 1.3.2.2 yamt * 11 1.3.2.2 yamt * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 12 1.3.2.2 yamt * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 13 1.3.2.2 yamt * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 14 1.3.2.2 yamt * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 15 1.3.2.2 yamt * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 16 1.3.2.2 yamt * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 17 1.3.2.2 yamt * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 18 1.3.2.2 yamt */ 19 1.3.2.2 yamt 20 1.3.2.2 yamt #include <sys/cdefs.h> 21 1.3.2.2 yamt __KERNEL_RCSID(0, "$NetBSD: alipm.c,v 1.3.2.2 2009/05/04 08:12:54 yamt Exp $"); 22 1.3.2.2 yamt 23 1.3.2.2 yamt #include <sys/param.h> 24 1.3.2.2 yamt #include <sys/device.h> 25 1.3.2.2 yamt #include <sys/kernel.h> 26 1.3.2.2 yamt #include <sys/rwlock.h> 27 1.3.2.2 yamt #include <sys/proc.h> 28 1.3.2.2 yamt #include <sys/systm.h> 29 1.3.2.2 yamt 30 1.3.2.2 yamt #include <dev/i2c/i2cvar.h> 31 1.3.2.2 yamt 32 1.3.2.2 yamt #include <dev/pci/pcidevs.h> 33 1.3.2.2 yamt #include <dev/pci/pcireg.h> 34 1.3.2.2 yamt #include <dev/pci/pcivar.h> 35 1.3.2.2 yamt 36 1.3.2.2 yamt /* 37 1.3.2.2 yamt * Acer Labs M7101 Power register definitions. 38 1.3.2.2 yamt */ 39 1.3.2.2 yamt 40 1.3.2.2 yamt /* PCI configuration registers. */ 41 1.3.2.2 yamt #define ALIPM_CONF 0xd0 /* general configuration */ 42 1.3.2.2 yamt #define ALIPM_CONF_SMBEN 0x0400 /* enable SMBus */ 43 1.3.2.2 yamt #define ALIPM_BASE 0xe0 /* ACPI and SMBus base address */ 44 1.3.2.2 yamt #define ALIPM_SMB_HOSTC 0xf0 /* host configuration */ 45 1.3.2.2 yamt #define ALIPM_SMB_HOSTC_HSTEN 0x00000001 /* enable host controller */ 46 1.3.2.2 yamt #define ALIPM_SMB_HOSTC_CLOCK 0x00e00000 /* clock speed */ 47 1.3.2.2 yamt #define ALIPM_SMB_HOSTC_149K 0x00000000 /* 149 KHz clock */ 48 1.3.2.2 yamt #define ALIPM_SMB_HOSTC_74K 0x00200000 /* 74 KHz clock */ 49 1.3.2.2 yamt #define ALIPM_SMB_HOSTC_37K 0x00400000 /* 37 KHz clock */ 50 1.3.2.2 yamt #define ALIPM_SMB_HOSTC_223K 0x00800000 /* 223 KHz clock */ 51 1.3.2.2 yamt #define ALIPM_SMB_HOSTC_111K 0x00a00000 /* 111 KHz clock */ 52 1.3.2.2 yamt #define ALIPM_SMB_HOSTC_55K 0x00c00000 /* 55 KHz clock */ 53 1.3.2.2 yamt 54 1.3.2.2 yamt #define ALIPM_SMB_SIZE 32 /* SMBus I/O space size */ 55 1.3.2.2 yamt 56 1.3.2.2 yamt /* SMBus I/O registers */ 57 1.3.2.2 yamt #define ALIPM_SMB_HS 0x00 /* host status */ 58 1.3.2.2 yamt #define ALIPM_SMB_HS_IDLE 0x04 59 1.3.2.2 yamt #define ALIPM_SMB_HS_BUSY 0x08 /* running a command */ 60 1.3.2.2 yamt #define ALIPM_SMB_HS_DONE 0x10 /* command completed */ 61 1.3.2.2 yamt #define ALIPM_SMB_HS_DEVERR 0x20 /* command error */ 62 1.3.2.2 yamt #define ALIPM_SMB_HS_BUSERR 0x40 /* transaction collision */ 63 1.3.2.2 yamt #define ALIPM_SMB_HS_FAILED 0x80 /* failed bus transaction */ 64 1.3.2.2 yamt #define ALIPM_SMB_HS_BITS \ 65 1.3.2.2 yamt "\020\003IDLE\004BUSY\005DONE\006DEVERR\007BUSERR\010FAILED" 66 1.3.2.2 yamt #define ALIPM_SMB_HC 0x01 /* host control */ 67 1.3.2.2 yamt #define ALIPM_SMB_HC_KILL 0x04 /* kill command */ 68 1.3.2.2 yamt #define ALIPM_SMB_HC_RESET 0x08 /* reset bus */ 69 1.3.2.2 yamt #define ALIPM_SMB_HC_CMD_QUICK 0x00 /* QUICK command */ 70 1.3.2.2 yamt #define ALIPM_SMB_HC_CMD_BYTE 0x10 /* BYTE command */ 71 1.3.2.2 yamt #define ALIPM_SMB_HC_CMD_BDATA 0x20 /* BYTE DATA command */ 72 1.3.2.2 yamt #define ALIPM_SMB_HC_CMD_WDATA 0x30 /* WORD DATA command */ 73 1.3.2.2 yamt #define ALIPM_SMB_HC_CMD_BLOCK 0x40 /* BLOCK command */ 74 1.3.2.2 yamt #define ALIPM_SMB_START 0x02 /* start command */ 75 1.3.2.2 yamt #define ALIPM_SMB_TXSLVA 0x03 /* transmit slave address */ 76 1.3.2.2 yamt #define ALIPM_SMB_TXSLVA_READ (1 << 0) /* read direction */ 77 1.3.2.2 yamt #define ALIPM_SMB_TXSLVA_ADDR(x) (((x) & 0x7f) << 1) /* 7-bit address */ 78 1.3.2.2 yamt #define ALIPM_SMB_HD0 0x04 /* host data 0 */ 79 1.3.2.2 yamt #define ALIPM_SMB_HD1 0x05 /* host data 1 */ 80 1.3.2.2 yamt #define ALIPM_SMB_HBDB 0x06 /* host block data byte */ 81 1.3.2.2 yamt #define ALIPM_SMB_HCMD 0x07 /* host command */ 82 1.3.2.2 yamt 83 1.3.2.2 yamt /* 84 1.3.2.2 yamt * Newer chips have a more standard, but different PCI configuration 85 1.3.2.2 yamt * register layout. 86 1.3.2.2 yamt */ 87 1.3.2.2 yamt 88 1.3.2.2 yamt #define ALIPM_SMB_BASE 0x14 /* SMBus base address */ 89 1.3.2.2 yamt #define ALIPM_SMB_HOSTX 0xe0 /* host configuration */ 90 1.3.2.2 yamt 91 1.3.2.2 yamt #ifdef ALIPM_DEBUG 92 1.3.2.2 yamt #define DPRINTF(x) printf x 93 1.3.2.2 yamt #else 94 1.3.2.2 yamt #define DPRINTF(x) 95 1.3.2.2 yamt #endif 96 1.3.2.2 yamt 97 1.3.2.2 yamt #define ALIPM_DELAY 100 98 1.3.2.2 yamt #define ALIPM_TIMEOUT 1 99 1.3.2.2 yamt 100 1.3.2.2 yamt struct alipm_softc { 101 1.3.2.2 yamt struct device sc_dev; 102 1.3.2.2 yamt 103 1.3.2.2 yamt bus_space_tag_t sc_iot; 104 1.3.2.2 yamt bus_space_handle_t sc_ioh; 105 1.3.2.2 yamt 106 1.3.2.2 yamt struct i2c_controller sc_smb_tag; 107 1.3.2.2 yamt krwlock_t sc_smb_lock; 108 1.3.2.2 yamt }; 109 1.3.2.2 yamt 110 1.3.2.2 yamt static int alipm_match(struct device *, cfdata_t, void *); 111 1.3.2.2 yamt static void alipm_attach(struct device *, struct device *, void *); 112 1.3.2.2 yamt 113 1.3.2.2 yamt int alipm_smb_acquire_bus(void *, int); 114 1.3.2.2 yamt void alipm_smb_release_bus(void *, int); 115 1.3.2.2 yamt int alipm_smb_exec(void *, i2c_op_t, i2c_addr_t, const void *, 116 1.3.2.2 yamt size_t, void *, size_t, int); 117 1.3.2.2 yamt 118 1.3.2.2 yamt CFATTACH_DECL(alipm, sizeof(struct alipm_softc), 119 1.3.2.2 yamt alipm_match, alipm_attach, NULL, NULL); 120 1.3.2.2 yamt 121 1.3.2.2 yamt static int 122 1.3.2.2 yamt alipm_match(struct device *parent, cfdata_t match, void *aux) 123 1.3.2.2 yamt { 124 1.3.2.2 yamt struct pci_attach_args *pa = aux; 125 1.3.2.2 yamt 126 1.3.2.2 yamt if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_ALI && 127 1.3.2.2 yamt (PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_ALI_M7101)) 128 1.3.2.2 yamt return (1); 129 1.3.2.2 yamt return (0); 130 1.3.2.2 yamt } 131 1.3.2.2 yamt 132 1.3.2.2 yamt static void 133 1.3.2.2 yamt alipm_attach(struct device *parent, struct device *self, void *aux) 134 1.3.2.2 yamt { 135 1.3.2.2 yamt struct alipm_softc *sc = (struct alipm_softc *) self; 136 1.3.2.2 yamt struct pci_attach_args *pa = aux; 137 1.3.2.2 yamt struct i2cbus_attach_args iba; 138 1.3.2.2 yamt pcireg_t iobase, reg; 139 1.3.2.2 yamt bus_size_t iosize = ALIPM_SMB_SIZE; 140 1.3.2.2 yamt 141 1.3.2.2 yamt /* Old chips don't have the PCI 2.2 Capabilities List. */ 142 1.3.2.2 yamt reg = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG); 143 1.3.2.2 yamt if ((reg & PCI_STATUS_CAPLIST_SUPPORT) == 0) { 144 1.3.2.2 yamt /* Map I/O space */ 145 1.3.2.2 yamt iobase = pci_conf_read(pa->pa_pc, pa->pa_tag, ALIPM_BASE); 146 1.3.2.2 yamt sc->sc_iot = pa->pa_iot; 147 1.3.2.2 yamt if (iobase == 0 || 148 1.3.2.2 yamt bus_space_map(sc->sc_iot, iobase >> 16, 149 1.3.2.2 yamt iosize, 0, &sc->sc_ioh)) { 150 1.3.2.2 yamt aprint_error_dev(&sc->sc_dev, "can't map I/O space\n"); 151 1.3.2.2 yamt return; 152 1.3.2.2 yamt } 153 1.3.2.2 yamt 154 1.3.2.2 yamt reg = pci_conf_read(pa->pa_pc, pa->pa_tag, ALIPM_CONF); 155 1.3.2.2 yamt if ((reg & ALIPM_CONF_SMBEN) == 0) { 156 1.3.2.2 yamt aprint_error_dev(&sc->sc_dev, "SMBus disabled\n"); 157 1.3.2.2 yamt goto fail; 158 1.3.2.2 yamt } 159 1.3.2.2 yamt 160 1.3.2.2 yamt reg = pci_conf_read(pa->pa_pc, pa->pa_tag, ALIPM_SMB_HOSTC); 161 1.3.2.2 yamt if ((reg & ALIPM_SMB_HOSTC_HSTEN) == 0) { 162 1.3.2.2 yamt aprint_error_dev(&sc->sc_dev, "SMBus host disabled\n"); 163 1.3.2.2 yamt goto fail; 164 1.3.2.2 yamt } 165 1.3.2.2 yamt } else { 166 1.3.2.2 yamt /* Map I/O space */ 167 1.3.2.2 yamt if (pci_mapreg_map(pa, ALIPM_SMB_BASE, PCI_MAPREG_TYPE_IO, 0, 168 1.3.2.2 yamt &sc->sc_iot, &sc->sc_ioh, NULL, &iosize)) { 169 1.3.2.2 yamt aprint_error_dev(&sc->sc_dev, "can't map I/O space\n"); 170 1.3.2.2 yamt return; 171 1.3.2.2 yamt } 172 1.3.2.2 yamt 173 1.3.2.2 yamt reg = pci_conf_read(pa->pa_pc, pa->pa_tag, ALIPM_SMB_HOSTX); 174 1.3.2.2 yamt if ((reg & ALIPM_SMB_HOSTC_HSTEN) == 0) { 175 1.3.2.2 yamt aprint_error_dev(&sc->sc_dev, "SMBus host disabled\n"); 176 1.3.2.2 yamt goto fail; 177 1.3.2.2 yamt } 178 1.3.2.2 yamt } 179 1.3.2.2 yamt 180 1.3.2.2 yamt switch (reg & ALIPM_SMB_HOSTC_CLOCK) { 181 1.3.2.2 yamt case ALIPM_SMB_HOSTC_149K: 182 1.3.2.2 yamt aprint_normal(": 149KHz clock\n"); 183 1.3.2.2 yamt break; 184 1.3.2.2 yamt case ALIPM_SMB_HOSTC_74K: 185 1.3.2.2 yamt aprint_normal(": 74KHz clock\n"); 186 1.3.2.2 yamt break; 187 1.3.2.2 yamt case ALIPM_SMB_HOSTC_37K: 188 1.3.2.2 yamt aprint_normal(": 37KHz clock\n"); 189 1.3.2.2 yamt break; 190 1.3.2.2 yamt case ALIPM_SMB_HOSTC_223K: 191 1.3.2.2 yamt aprint_normal(": 223KHz clock\n"); 192 1.3.2.2 yamt break; 193 1.3.2.2 yamt case ALIPM_SMB_HOSTC_111K: 194 1.3.2.2 yamt aprint_normal(": 111KHz clock\n"); 195 1.3.2.2 yamt break; 196 1.3.2.2 yamt case ALIPM_SMB_HOSTC_55K: 197 1.3.2.2 yamt aprint_normal(": 55KHz clock\n"); 198 1.3.2.2 yamt break; 199 1.3.2.2 yamt default: 200 1.3.2.2 yamt aprint_normal(" unknown clock speed\n"); 201 1.3.2.2 yamt break; 202 1.3.2.2 yamt } 203 1.3.2.2 yamt 204 1.3.2.2 yamt /* Attach I2C bus */ 205 1.3.2.2 yamt rw_init(&sc->sc_smb_lock); 206 1.3.2.2 yamt sc->sc_smb_tag.ic_cookie = sc; 207 1.3.2.2 yamt sc->sc_smb_tag.ic_acquire_bus = alipm_smb_acquire_bus; 208 1.3.2.2 yamt sc->sc_smb_tag.ic_release_bus = alipm_smb_release_bus; 209 1.3.2.2 yamt sc->sc_smb_tag.ic_exec = alipm_smb_exec; 210 1.3.2.2 yamt 211 1.3.2.2 yamt memset(&iba, 0, sizeof iba); 212 1.3.2.2 yamt iba.iba_tag = &sc->sc_smb_tag; 213 1.3.2.2 yamt (void)config_found_ia(&sc->sc_dev, "i2cbus", &iba, iicbus_print); 214 1.3.2.2 yamt 215 1.3.2.2 yamt return; 216 1.3.2.2 yamt 217 1.3.2.2 yamt fail: 218 1.3.2.2 yamt bus_space_unmap(sc->sc_iot, sc->sc_ioh, iosize); 219 1.3.2.2 yamt } 220 1.3.2.2 yamt 221 1.3.2.2 yamt int 222 1.3.2.2 yamt alipm_smb_acquire_bus(void *cookie, int flags) 223 1.3.2.2 yamt { 224 1.3.2.2 yamt struct alipm_softc *sc = cookie; 225 1.3.2.2 yamt 226 1.3.2.2 yamt if (flags & I2C_F_POLL) 227 1.3.2.2 yamt return (0); 228 1.3.2.2 yamt 229 1.3.2.2 yamt rw_enter(&sc->sc_smb_lock, RW_WRITER); 230 1.3.2.2 yamt return 0; 231 1.3.2.2 yamt } 232 1.3.2.2 yamt 233 1.3.2.2 yamt void 234 1.3.2.2 yamt alipm_smb_release_bus(void *cookie, int flags) 235 1.3.2.2 yamt { 236 1.3.2.2 yamt struct alipm_softc *sc = cookie; 237 1.3.2.2 yamt 238 1.3.2.2 yamt if (flags & I2C_F_POLL) 239 1.3.2.2 yamt return; 240 1.3.2.2 yamt 241 1.3.2.2 yamt rw_exit(&sc->sc_smb_lock); 242 1.3.2.2 yamt } 243 1.3.2.2 yamt 244 1.3.2.2 yamt int 245 1.3.2.2 yamt alipm_smb_exec(void *cookie, i2c_op_t op, i2c_addr_t addr, 246 1.3.2.2 yamt const void *cmdbuf, size_t cmdlen, void *buf, size_t len, int flags) 247 1.3.2.2 yamt { 248 1.3.2.2 yamt struct alipm_softc *sc = cookie; 249 1.3.2.2 yamt u_int8_t *b; 250 1.3.2.2 yamt u_int8_t ctl, st; 251 1.3.2.2 yamt int retries, error = 0; 252 1.3.2.2 yamt 253 1.3.2.2 yamt DPRINTF(("%s: exec op %d, addr 0x%x, cmdlen %d, len %d, " 254 1.3.2.2 yamt "flags 0x%x\n", sc->sc_dev.dv_xname, op, addr, cmdlen, 255 1.3.2.2 yamt len, flags)); 256 1.3.2.2 yamt 257 1.3.2.2 yamt if (!I2C_OP_STOP_P(op) || cmdlen > 1 || len > 2) 258 1.3.2.2 yamt return (EOPNOTSUPP); 259 1.3.2.2 yamt 260 1.3.2.2 yamt /* Clear status bits */ 261 1.3.2.2 yamt bus_space_write_1(sc->sc_iot, sc->sc_ioh, ALIPM_SMB_HS, 262 1.3.2.2 yamt ALIPM_SMB_HS_DONE | ALIPM_SMB_HS_FAILED | 263 1.3.2.2 yamt ALIPM_SMB_HS_BUSERR | ALIPM_SMB_HS_DEVERR); 264 1.3.2.2 yamt bus_space_barrier(sc->sc_iot, sc->sc_ioh, ALIPM_SMB_HS, 1, 265 1.3.2.2 yamt BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 266 1.3.2.2 yamt 267 1.3.2.2 yamt /* Wait until bus is idle */ 268 1.3.2.2 yamt for (retries = 1000; retries > 0; retries--) { 269 1.3.2.2 yamt st = bus_space_read_1(sc->sc_iot, sc->sc_ioh, ALIPM_SMB_HS); 270 1.3.2.2 yamt bus_space_barrier(sc->sc_iot, sc->sc_ioh, ALIPM_SMB_HS, 1, 271 1.3.2.2 yamt BUS_SPACE_BARRIER_READ); 272 1.3.2.2 yamt if (st & (ALIPM_SMB_HS_IDLE | ALIPM_SMB_HS_FAILED | 273 1.3.2.2 yamt ALIPM_SMB_HS_BUSERR | ALIPM_SMB_HS_DEVERR)) 274 1.3.2.2 yamt break; 275 1.3.2.2 yamt DELAY(ALIPM_DELAY); 276 1.3.2.2 yamt } 277 1.3.2.2 yamt if (retries == 0) { 278 1.3.2.2 yamt aprint_error_dev(&sc->sc_dev, "timeout st 0x%x\n", st); 279 1.3.2.2 yamt return (ETIMEDOUT); 280 1.3.2.2 yamt } 281 1.3.2.2 yamt if (st & (ALIPM_SMB_HS_FAILED | 282 1.3.2.2 yamt ALIPM_SMB_HS_BUSERR | ALIPM_SMB_HS_DEVERR)) { 283 1.3.2.2 yamt aprint_error_dev(&sc->sc_dev, "error st 0x%x\n", st); 284 1.3.2.2 yamt return (EIO); 285 1.3.2.2 yamt } 286 1.3.2.2 yamt 287 1.3.2.2 yamt /* Set slave address and transfer direction. */ 288 1.3.2.2 yamt bus_space_write_1(sc->sc_iot, sc->sc_ioh, ALIPM_SMB_TXSLVA, 289 1.3.2.2 yamt ALIPM_SMB_TXSLVA_ADDR(addr) | 290 1.3.2.2 yamt (I2C_OP_READ_P(op) ? ALIPM_SMB_TXSLVA_READ : 0)); 291 1.3.2.2 yamt 292 1.3.2.2 yamt if (cmdlen > 0) 293 1.3.2.2 yamt /* Set command byte */ 294 1.3.2.2 yamt bus_space_write_1(sc->sc_iot, sc->sc_ioh, 295 1.3.2.2 yamt ALIPM_SMB_HCMD, ((const u_int8_t *)cmdbuf)[0]); 296 1.3.2.2 yamt 297 1.3.2.2 yamt if (I2C_OP_WRITE_P(op)) { 298 1.3.2.2 yamt /* Write data. */ 299 1.3.2.2 yamt b = buf; 300 1.3.2.2 yamt if (len > 0) 301 1.3.2.2 yamt bus_space_write_1(sc->sc_iot, sc->sc_ioh, 302 1.3.2.2 yamt ALIPM_SMB_HD0, b[0]); 303 1.3.2.2 yamt if (len > 1) 304 1.3.2.2 yamt bus_space_write_1(sc->sc_iot, sc->sc_ioh, 305 1.3.2.2 yamt ALIPM_SMB_HD1, b[1]); 306 1.3.2.2 yamt } 307 1.3.2.2 yamt 308 1.3.2.2 yamt /* Set SMBus command */ 309 1.3.2.2 yamt if (len == 0) { 310 1.3.2.2 yamt if (cmdlen == 0) 311 1.3.2.2 yamt ctl = ALIPM_SMB_HC_CMD_QUICK; 312 1.3.2.2 yamt else 313 1.3.2.2 yamt ctl = ALIPM_SMB_HC_CMD_BYTE; 314 1.3.2.2 yamt } else if (len == 1) 315 1.3.2.2 yamt ctl = ALIPM_SMB_HC_CMD_BDATA; 316 1.3.2.2 yamt else 317 1.3.2.2 yamt ctl = ALIPM_SMB_HC_CMD_WDATA; 318 1.3.2.2 yamt bus_space_write_1(sc->sc_iot, sc->sc_ioh, ALIPM_SMB_HC, ctl); 319 1.3.2.2 yamt 320 1.3.2.2 yamt /* Start transaction */ 321 1.3.2.2 yamt bus_space_barrier(sc->sc_iot, sc->sc_ioh, 0, ALIPM_SMB_SIZE, 322 1.3.2.2 yamt BUS_SPACE_BARRIER_WRITE); 323 1.3.2.2 yamt bus_space_write_1(sc->sc_iot, sc->sc_ioh, ALIPM_SMB_START, 0xff); 324 1.3.2.2 yamt bus_space_barrier(sc->sc_iot, sc->sc_ioh, 0, ALIPM_SMB_SIZE, 325 1.3.2.2 yamt BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 326 1.3.2.2 yamt 327 1.3.2.2 yamt /* Poll for completion */ 328 1.3.2.2 yamt DELAY(ALIPM_DELAY); 329 1.3.2.2 yamt for (retries = 1000; retries > 0; retries--) { 330 1.3.2.2 yamt st = bus_space_read_1(sc->sc_iot, sc->sc_ioh, ALIPM_SMB_HS); 331 1.3.2.2 yamt bus_space_barrier(sc->sc_iot, sc->sc_ioh, ALIPM_SMB_HS, 1, 332 1.3.2.2 yamt BUS_SPACE_BARRIER_READ); 333 1.3.2.2 yamt if (st & (ALIPM_SMB_HS_IDLE | ALIPM_SMB_HS_FAILED | 334 1.3.2.2 yamt ALIPM_SMB_HS_BUSERR | ALIPM_SMB_HS_DEVERR)) 335 1.3.2.2 yamt break; 336 1.3.2.2 yamt DELAY(ALIPM_DELAY); 337 1.3.2.2 yamt } 338 1.3.2.2 yamt if (retries == 0) { 339 1.3.2.2 yamt aprint_error_dev(&sc->sc_dev, "timeout st 0x%x, resetting\n",st); 340 1.3.2.2 yamt bus_space_write_1(sc->sc_iot, sc->sc_ioh, ALIPM_SMB_HC, 341 1.3.2.2 yamt ALIPM_SMB_HC_RESET); 342 1.3.2.2 yamt bus_space_barrier(sc->sc_iot, sc->sc_ioh, 0, ALIPM_SMB_SIZE, 343 1.3.2.2 yamt BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 344 1.3.2.2 yamt st = bus_space_read_1(sc->sc_iot, sc->sc_ioh, ALIPM_SMB_HS); 345 1.3.2.2 yamt bus_space_barrier(sc->sc_iot, sc->sc_ioh, ALIPM_SMB_HS, 1, 346 1.3.2.2 yamt BUS_SPACE_BARRIER_READ); 347 1.3.2.2 yamt error = ETIMEDOUT; 348 1.3.2.2 yamt goto done; 349 1.3.2.2 yamt } 350 1.3.2.2 yamt 351 1.3.2.2 yamt if ((st & ALIPM_SMB_HS_DONE) == 0) { 352 1.3.2.2 yamt bus_space_write_1(sc->sc_iot, sc->sc_ioh, ALIPM_SMB_HC, 353 1.3.2.2 yamt ALIPM_SMB_HC_KILL); 354 1.3.2.2 yamt bus_space_barrier(sc->sc_iot, sc->sc_ioh, 0, ALIPM_SMB_SIZE, 355 1.3.2.2 yamt BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 356 1.3.2.2 yamt st = bus_space_read_1(sc->sc_iot, sc->sc_ioh, ALIPM_SMB_HS); 357 1.3.2.2 yamt bus_space_barrier(sc->sc_iot, sc->sc_ioh, ALIPM_SMB_HS, 1, 358 1.3.2.2 yamt BUS_SPACE_BARRIER_READ); 359 1.3.2.2 yamt if ((st & ALIPM_SMB_HS_FAILED) == 0) 360 1.3.2.2 yamt aprint_error_dev(&sc->sc_dev, "error st 0x%x\n", st); 361 1.3.2.2 yamt } 362 1.3.2.2 yamt 363 1.3.2.2 yamt /* Check for errors */ 364 1.3.2.2 yamt if (st & (ALIPM_SMB_HS_FAILED | 365 1.3.2.2 yamt ALIPM_SMB_HS_BUSERR | ALIPM_SMB_HS_DEVERR)) { 366 1.3.2.2 yamt error = EIO; 367 1.3.2.2 yamt goto done; 368 1.3.2.2 yamt } 369 1.3.2.2 yamt 370 1.3.2.2 yamt if (I2C_OP_READ_P(op)) { 371 1.3.2.2 yamt /* Read data */ 372 1.3.2.2 yamt b = buf; 373 1.3.2.2 yamt if (len > 0) { 374 1.3.2.2 yamt b[0] = bus_space_read_1(sc->sc_iot, sc->sc_ioh, 375 1.3.2.2 yamt ALIPM_SMB_HD0); 376 1.3.2.2 yamt bus_space_barrier(sc->sc_iot, sc->sc_ioh, 377 1.3.2.2 yamt ALIPM_SMB_HD0, 1, BUS_SPACE_BARRIER_READ); 378 1.3.2.2 yamt } 379 1.3.2.2 yamt if (len > 1) { 380 1.3.2.2 yamt b[1] = bus_space_read_1(sc->sc_iot, sc->sc_ioh, 381 1.3.2.2 yamt ALIPM_SMB_HD1); 382 1.3.2.2 yamt bus_space_barrier(sc->sc_iot, sc->sc_ioh, 383 1.3.2.2 yamt ALIPM_SMB_HD1, 1, BUS_SPACE_BARRIER_READ); 384 1.3.2.2 yamt } 385 1.3.2.2 yamt } 386 1.3.2.2 yamt 387 1.3.2.2 yamt done: 388 1.3.2.2 yamt /* Clear status bits */ 389 1.3.2.2 yamt bus_space_write_1(sc->sc_iot, sc->sc_ioh, ALIPM_SMB_HS, st); 390 1.3.2.2 yamt 391 1.3.2.2 yamt return (error); 392 1.3.2.2 yamt } 393
Indexes created Sun Oct 19 02:09:48 GMT 2025