/* $OpenBSD: alipm.c,v 1.13 2007/05/03 12:19:01 dlg Exp $ */ /* * Copyright (c) 2005 Mark Kettenis * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include #include #include #include #include #include #include #include #include #include #ifdef __sparc64__ #include #endif /* * Acer Labs M7101 Power register definitions. */ /* PCI configuration registers. */ #define ALIPM_CONF 0xd0 /* general configuration */ #define ALIPM_CONF_SMBEN 0x0400 /* enable SMBus */ #define ALIPM_BASE 0xe0 /* ACPI and SMBus base address */ #define ALIPM_SMB_HOSTC 0xf0 /* host configuration */ #define ALIPM_SMB_HOSTC_HSTEN 0x00000001 /* enable host controller */ #define ALIPM_SMB_HOSTC_CLOCK 0x00e00000 /* clock speed */ #define ALIPM_SMB_HOSTC_149K 0x00000000 /* 149 KHz clock */ #define ALIPM_SMB_HOSTC_74K 0x00200000 /* 74 KHz clock */ #define ALIPM_SMB_HOSTC_37K 0x00400000 /* 37 KHz clock */ #define ALIPM_SMB_HOSTC_223K 0x00800000 /* 223 KHz clock */ #define ALIPM_SMB_HOSTC_111K 0x00a00000 /* 111 KHz clock */ #define ALIPM_SMB_HOSTC_55K 0x00c00000 /* 55 KHz clock */ #define ALIPM_SMB_SIZE 32 /* SMBus I/O space size */ /* SMBus I/O registers */ #define ALIPM_SMB_HS 0x00 /* host status */ #define ALIPM_SMB_HS_IDLE 0x04 #define ALIPM_SMB_HS_BUSY 0x08 /* running a command */ #define ALIPM_SMB_HS_DONE 0x10 /* command completed */ #define ALIPM_SMB_HS_DEVERR 0x20 /* command error */ #define ALIPM_SMB_HS_BUSERR 0x40 /* transaction collision */ #define ALIPM_SMB_HS_FAILED 0x80 /* failed bus transaction */ #define ALIPM_SMB_HS_BITS \ "\020\003IDLE\004BUSY\005DONE\006DEVERR\007BUSERR\010FAILED" #define ALIPM_SMB_HC 0x01 /* host control */ #define ALIPM_SMB_HC_KILL 0x04 /* kill command */ #define ALIPM_SMB_HC_RESET 0x08 /* reset bus */ #define ALIPM_SMB_HC_CMD_QUICK 0x00 /* QUICK command */ #define ALIPM_SMB_HC_CMD_BYTE 0x10 /* BYTE command */ #define ALIPM_SMB_HC_CMD_BDATA 0x20 /* BYTE DATA command */ #define ALIPM_SMB_HC_CMD_WDATA 0x30 /* WORD DATA command */ #define ALIPM_SMB_HC_CMD_BLOCK 0x40 /* BLOCK command */ #define ALIPM_SMB_START 0x02 /* start command */ #define ALIPM_SMB_TXSLVA 0x03 /* transmit slave address */ #define ALIPM_SMB_TXSLVA_READ (1 << 0) /* read direction */ #define ALIPM_SMB_TXSLVA_ADDR(x) (((x) & 0x7f) << 1) /* 7-bit address */ #define ALIPM_SMB_HD0 0x04 /* host data 0 */ #define ALIPM_SMB_HD1 0x05 /* host data 1 */ #define ALIPM_SMB_HBDB 0x06 /* host block data byte */ #define ALIPM_SMB_HCMD 0x07 /* host command */ /* * Newer chips have a more standard, but different PCI configuration * register layout. */ #define ALIPM_SMB_BASE 0x14 /* SMBus base address */ #define ALIPM_SMB_HOSTX 0xe0 /* host configuration */ #ifdef ALIPM_DEBUG #define DPRINTF(x) printf x #else #define DPRINTF(x) #endif #define ALIPM_DELAY 100 #define ALIPM_TIMEOUT 1 struct alipm_softc { struct device sc_dev; bus_space_tag_t sc_iot; bus_space_handle_t sc_ioh; struct i2c_controller sc_smb_tag; struct rwlock sc_smb_lock; }; int alipm_match(struct device *, void *, void *); void alipm_attach(struct device *, struct device *, void *); int alipm_smb_acquire_bus(void *, int); void alipm_smb_release_bus(void *, int); int alipm_smb_exec(void *, i2c_op_t, i2c_addr_t, const void *, size_t, void *, size_t, int); struct cfattach alipm_ca = { sizeof(struct alipm_softc), alipm_match, alipm_attach }; struct cfdriver alipm_cd = { NULL, "alipm", DV_DULL }; int alipm_match(struct device *parent, void *match, void *aux) { struct pci_attach_args *pa = aux; if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_ALI && (PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_ALI_M7101)) return (1); return (0); } void alipm_attach(struct device *parent, struct device *self, void *aux) { struct alipm_softc *sc = (struct alipm_softc *) self; struct pci_attach_args *pa = aux; struct i2cbus_attach_args iba; pcireg_t iobase, reg; bus_size_t iosize = ALIPM_SMB_SIZE; /* Old chips don't have the PCI 2.2 Capabilities List. */ reg = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG); if ((reg & PCI_STATUS_CAPLIST_SUPPORT) == 0) { /* Map I/O space */ iobase = pci_conf_read(pa->pa_pc, pa->pa_tag, ALIPM_BASE); sc->sc_iot = pa->pa_iot; if (iobase == 0 || bus_space_map(sc->sc_iot, iobase >> 16, iosize, 0, &sc->sc_ioh)) { printf(": can't map I/O space\n"); return; } reg = pci_conf_read(pa->pa_pc, pa->pa_tag, ALIPM_CONF); if ((reg & ALIPM_CONF_SMBEN) == 0) { printf(": SMBus disabled\n"); goto fail; } reg = pci_conf_read(pa->pa_pc, pa->pa_tag, ALIPM_SMB_HOSTC); if ((reg & ALIPM_SMB_HOSTC_HSTEN) == 0) { printf(": SMBus host disabled\n"); goto fail; } } else { /* Map I/O space */ if (pci_mapreg_map(pa, ALIPM_SMB_BASE, PCI_MAPREG_TYPE_IO, 0, &sc->sc_iot, &sc->sc_ioh, NULL, &iosize, ALIPM_SMB_SIZE)) { printf(": can't map I/O space\n"); return; } reg = pci_conf_read(pa->pa_pc, pa->pa_tag, ALIPM_SMB_HOSTX); if ((reg & ALIPM_SMB_HOSTC_HSTEN) == 0) { printf(": SMBus host disabled\n"); goto fail; } } switch (reg & ALIPM_SMB_HOSTC_CLOCK) { case ALIPM_SMB_HOSTC_149K: printf(": 149KHz clock"); break; case ALIPM_SMB_HOSTC_74K: printf(": 74KHz clock"); break; case ALIPM_SMB_HOSTC_37K: printf(": 37KHz clock"); break; case ALIPM_SMB_HOSTC_223K: printf(": 223KHz clock"); break; case ALIPM_SMB_HOSTC_111K: printf(": 111KHz clock"); break; case ALIPM_SMB_HOSTC_55K: printf(": 55KHz clock"); break; default: printf(" unknown clock speed"); break; } printf("\n"); /* Attach I2C bus */ rw_init(&sc->sc_smb_lock, "alipm"); sc->sc_smb_tag.ic_cookie = sc; sc->sc_smb_tag.ic_acquire_bus = alipm_smb_acquire_bus; sc->sc_smb_tag.ic_release_bus = alipm_smb_release_bus; sc->sc_smb_tag.ic_exec = alipm_smb_exec; bzero(&iba, sizeof iba); iba.iba_name = "iic"; iba.iba_tag = &sc->sc_smb_tag; #ifdef __sparc64__ iba.iba_bus_scan = ofwiic_pci_scan; iba.iba_bus_scan_arg = pa; #endif config_found(&sc->sc_dev, &iba, iicbus_print); return; fail: bus_space_unmap(sc->sc_iot, sc->sc_ioh, iosize); } int alipm_smb_acquire_bus(void *cookie, int flags) { struct alipm_softc *sc = cookie; if (flags & I2C_F_POLL) return (0); return (rw_enter(&sc->sc_smb_lock, RW_WRITE | RW_INTR)); } void alipm_smb_release_bus(void *cookie, int flags) { struct alipm_softc *sc = cookie; if (flags & I2C_F_POLL) return; rw_exit(&sc->sc_smb_lock); } int alipm_smb_exec(void *cookie, i2c_op_t op, i2c_addr_t addr, const void *cmdbuf, size_t cmdlen, void *buf, size_t len, int flags) { struct alipm_softc *sc = cookie; u_int8_t *b; u_int8_t ctl, st; int retries, error = 0; DPRINTF(("%s: exec op %d, addr 0x%x, cmdlen %d, len %d, " "flags 0x%x\n", sc->sc_dev.dv_xname, op, addr, cmdlen, len, flags)); if (!I2C_OP_STOP_P(op) || cmdlen > 1 || len > 2) return (EOPNOTSUPP); /* Clear status bits */ bus_space_write_1(sc->sc_iot, sc->sc_ioh, ALIPM_SMB_HS, ALIPM_SMB_HS_DONE | ALIPM_SMB_HS_FAILED | ALIPM_SMB_HS_BUSERR | ALIPM_SMB_HS_DEVERR); bus_space_barrier(sc->sc_iot, sc->sc_ioh, ALIPM_SMB_HS, 1, BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); /* Wait until bus is idle */ for (retries = 1000; retries > 0; retries--) { st = bus_space_read_1(sc->sc_iot, sc->sc_ioh, ALIPM_SMB_HS); bus_space_barrier(sc->sc_iot, sc->sc_ioh, ALIPM_SMB_HS, 1, BUS_SPACE_BARRIER_READ); if (st & (ALIPM_SMB_HS_IDLE | ALIPM_SMB_HS_FAILED | ALIPM_SMB_HS_BUSERR | ALIPM_SMB_HS_DEVERR)) break; DELAY(ALIPM_DELAY); } if (retries == 0) { printf("%s: timeout st 0x%b\n", sc->sc_dev.dv_xname, st, ALIPM_SMB_HS_BITS); return (ETIMEDOUT); } if (st & (ALIPM_SMB_HS_FAILED | ALIPM_SMB_HS_BUSERR | ALIPM_SMB_HS_DEVERR)) { printf("%s: error st 0x%b\n", sc->sc_dev.dv_xname, st, ALIPM_SMB_HS_BITS); return (EIO); } /* Set slave address and transfer direction. */ bus_space_write_1(sc->sc_iot, sc->sc_ioh, ALIPM_SMB_TXSLVA, ALIPM_SMB_TXSLVA_ADDR(addr) | (I2C_OP_READ_P(op) ? ALIPM_SMB_TXSLVA_READ : 0)); b = (void *)cmdbuf; if (cmdlen > 0) /* Set command byte */ bus_space_write_1(sc->sc_iot, sc->sc_ioh, ALIPM_SMB_HCMD, b[0]); if (I2C_OP_WRITE_P(op)) { /* Write data. */ b = buf; if (len > 0) bus_space_write_1(sc->sc_iot, sc->sc_ioh, ALIPM_SMB_HD0, b[0]); if (len > 1) bus_space_write_1(sc->sc_iot, sc->sc_ioh, ALIPM_SMB_HD1, b[1]); } /* Set SMBus command */ if (len == 0) ctl = ALIPM_SMB_HC_CMD_BYTE; else if (len == 1) ctl = ALIPM_SMB_HC_CMD_BDATA; else if (len == 2) ctl = ALIPM_SMB_HC_CMD_WDATA; bus_space_write_1(sc->sc_iot, sc->sc_ioh, ALIPM_SMB_HC, ctl); /* Start transaction */ bus_space_barrier(sc->sc_iot, sc->sc_ioh, 0, ALIPM_SMB_SIZE, BUS_SPACE_BARRIER_WRITE); bus_space_write_1(sc->sc_iot, sc->sc_ioh, ALIPM_SMB_START, 0xff); bus_space_barrier(sc->sc_iot, sc->sc_ioh, 0, ALIPM_SMB_SIZE, BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); /* Poll for completion */ DELAY(ALIPM_DELAY); for (retries = 1000; retries > 0; retries--) { st = bus_space_read_1(sc->sc_iot, sc->sc_ioh, ALIPM_SMB_HS); bus_space_barrier(sc->sc_iot, sc->sc_ioh, ALIPM_SMB_HS, 1, BUS_SPACE_BARRIER_READ); if (st & (ALIPM_SMB_HS_IDLE | ALIPM_SMB_HS_FAILED | ALIPM_SMB_HS_BUSERR | ALIPM_SMB_HS_DEVERR)) break; DELAY(ALIPM_DELAY); } if (retries == 0) { printf("%s: timeout st 0x%b, resetting\n", sc->sc_dev.dv_xname, st, ALIPM_SMB_HS_BITS); bus_space_write_1(sc->sc_iot, sc->sc_ioh, ALIPM_SMB_HC, ALIPM_SMB_HC_RESET); bus_space_barrier(sc->sc_iot, sc->sc_ioh, 0, ALIPM_SMB_SIZE, BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); st = bus_space_read_1(sc->sc_iot, sc->sc_ioh, ALIPM_SMB_HS); bus_space_barrier(sc->sc_iot, sc->sc_ioh, ALIPM_SMB_HS, 1, BUS_SPACE_BARRIER_READ); error = ETIMEDOUT; goto done; } if ((st & ALIPM_SMB_HS_DONE) == 0) { bus_space_write_1(sc->sc_iot, sc->sc_ioh, ALIPM_SMB_HC, ALIPM_SMB_HC_KILL); bus_space_barrier(sc->sc_iot, sc->sc_ioh, 0, ALIPM_SMB_SIZE, BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); st = bus_space_read_1(sc->sc_iot, sc->sc_ioh, ALIPM_SMB_HS); bus_space_barrier(sc->sc_iot, sc->sc_ioh, ALIPM_SMB_HS, 1, BUS_SPACE_BARRIER_READ); if ((st & ALIPM_SMB_HS_FAILED) == 0) printf("%s: error st 0x%b\n", sc->sc_dev.dv_xname, st, ALIPM_SMB_HS_BITS); } /* Check for errors */ if (st & (ALIPM_SMB_HS_FAILED | ALIPM_SMB_HS_BUSERR | ALIPM_SMB_HS_DEVERR)) { error = EIO; goto done; } if (I2C_OP_READ_P(op)) { /* Read data */ b = buf; if (len > 0) { b[0] = bus_space_read_1(sc->sc_iot, sc->sc_ioh, ALIPM_SMB_HD0); bus_space_barrier(sc->sc_iot, sc->sc_ioh, ALIPM_SMB_HD0, 1, BUS_SPACE_BARRIER_READ); } if (len > 1) { b[1] = bus_space_read_1(sc->sc_iot, sc->sc_ioh, ALIPM_SMB_HD1); bus_space_barrier(sc->sc_iot, sc->sc_ioh, ALIPM_SMB_HD1, 1, BUS_SPACE_BARRIER_READ); } } done: /* Clear status bits */ bus_space_write_1(sc->sc_iot, sc->sc_ioh, ALIPM_SMB_HS, st); return (error); }