diff options
| -rw-r--r-- | sys/dev/pci/alipm.c | 336 | ||||
| -rw-r--r-- | sys/dev/pci/files.pci | 7 |
2 files changed, 342 insertions, 1 deletions
diff --git a/sys/dev/pci/alipm.c b/sys/dev/pci/alipm.c new file mode 100644 index 00000000000..b4457e05122 --- /dev/null +++ b/sys/dev/pci/alipm.c @@ -0,0 +1,336 @@ +/* $OpenBSD: alipm.c,v 1.1 2005/12/24 23:36:36 kettenis 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 <sys/param.h> +#include <sys/device.h> +#include <sys/kernel.h> +#include <sys/lock.h> +#include <sys/proc.h> +#include <sys/systm.h> + +#include <dev/i2c/i2cvar.h> + +#include <dev/pci/pcidevs.h> +#include <dev/pci/pcireg.h> +#include <dev/pci/pcivar.h> + +/* + * Acer Labs M7101 Power register definitions. + */ + +/* PCI configuration registers. */ +#define ALIPM_CONF 0xd0 /* general configuration */ +#define ALIPM_CONF_SMBEN 0x0400 /* emanble 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 */ + +#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 lock 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; + pcireg_t reg; + + /* Map I/O space */ + iobase = pci_conf_read(pa->pa_pc, pa->pa_tag, ALIPM_BASE) >> 16; + sc->sc_iot = pa->pa_iot; + if (bus_space_map(sc->sc_iot, iobase, + ALIPM_SMB_SIZE, 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"); + return; + } + + 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"); + return; + } + + 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 */ + lockinit(&sc->sc_smb_lock, PRIBIO | PCATCH, "alipm", 0, 0); + 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; + iba.iba_name = "iic"; + iba.iba_tag = &sc->sc_smb_tag; + iba.iba_scan = 1; + config_found(&sc->sc_dev, &iba, iicbus_print); +} + +int +alipm_smb_acquire_bus(void *cookie, int flags) +{ + struct alipm_softc *sc = cookie; + + if (flags & I2C_F_POLL) + return (0); + + return (lockmgr(&sc->sc_smb_lock, LK_EXCLUSIVE, NULL)); +} + +void +alipm_smb_release_bus(void *cookie, int flags) +{ + struct alipm_softc *sc = cookie; + + if (flags & I2C_F_POLL) + return; + + lockmgr(&sc->sc_smb_lock, LK_RELEASE, NULL); +} + +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); + + /* 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); + 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 waiting until bus is idle\n", + sc->sc_dev.dv_xname); + return (ETIMEDOUT); + } + if (st & (ALIPM_SMB_HS_FAILED | + ALIPM_SMB_HS_BUSERR | ALIPM_SMB_HS_DEVERR)) { + printf("%s: bus error 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_write_1(sc->sc_iot, sc->sc_ioh, ALIPM_SMB_START, 0xff); + + /* 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); + 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\n", sc->sc_dev.dv_xname); + 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); + st = bus_space_read_1(sc->sc_iot, sc->sc_ioh, ALIPM_SMB_HS); + } + + /* 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); + if (len > 1) + b[1] = bus_space_read_1(sc->sc_iot, sc->sc_ioh, + ALIPM_SMB_HD1); + } + +done: + /* Clear status bits */ + bus_space_write_1(sc->sc_iot, sc->sc_ioh, ALIPM_SMB_HS, st); + + return (error); +} diff --git a/sys/dev/pci/files.pci b/sys/dev/pci/files.pci index b7bff165576..6959fc73a05 100644 --- a/sys/dev/pci/files.pci +++ b/sys/dev/pci/files.pci @@ -1,4 +1,4 @@ -# $OpenBSD: files.pci,v 1.193 2005/12/24 21:21:56 grange Exp $ +# $OpenBSD: files.pci,v 1.194 2005/12/24 23:36:36 kettenis Exp $ # $NetBSD: files.pci,v 1.20 1996/09/24 17:47:15 christos Exp $ # # Config file and device description for machine-independent PCI code. @@ -573,3 +573,8 @@ file dev/pci/bt8370.c art device ichiic: i2cbus attach ichiic at pci file dev/pci/ichiic.c ichiic + +# Acer Labs M7101 power management controller +device alipm: i2cbus +attach alipm at pci +file dev/pci/alipm.c alipm |