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Add support for SMBus System Interface (SSIF).
ok jmatthew@
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,225 @@ | ||
| /* $OpenBSD: ipmi_i2c.c,v 1.1 2019/08/19 18:31:03 kettenis Exp $ */ | ||
| /* | ||
| * Copyright (c) 2019 Mark Kettenis <kettenis@openbsd.org> | ||
| * | ||
| * 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/systm.h> | ||
| #include <sys/device.h> | ||
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| #include <machine/bus.h> | ||
|
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| #include <dev/i2c/i2cvar.h> | ||
| #include <dev/ipmivar.h> | ||
|
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| #define BMC_SA 0x20 /* BMC/ESM3 */ | ||
| #define BMC_LUN 0 | ||
|
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| struct ipmi_i2c_softc { | ||
| struct ipmi_softc sc; | ||
| i2c_tag_t sc_tag; | ||
| i2c_addr_t sc_addr; | ||
| uint8_t sc_rev; | ||
| }; | ||
|
|
||
| void cmn_buildmsg(struct ipmi_cmd *); | ||
| int ssif_sendmsg(struct ipmi_cmd *); | ||
| int ssif_recvmsg(struct ipmi_cmd *); | ||
| int ssif_reset(struct ipmi_softc *); | ||
| int ssif_probe(struct ipmi_softc *); | ||
|
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| struct ipmi_if ssif_if = { | ||
| "SSIF", | ||
| 0, | ||
| cmn_buildmsg, | ||
| ssif_sendmsg, | ||
| ssif_recvmsg, | ||
| ssif_reset, | ||
| ssif_probe, | ||
| IPMI_MSG_DATASND, | ||
| IPMI_MSG_DATARCV | ||
| }; | ||
|
|
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| extern void ipmi_attach(struct device *, struct device *, void *); | ||
|
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| int ipmi_i2c_match(struct device *, void *, void *); | ||
| void ipmi_i2c_attach(struct device *, struct device *, void *); | ||
|
|
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| struct cfattach ipmi_i2c_ca = { | ||
| sizeof(struct ipmi_i2c_softc), ipmi_i2c_match, ipmi_i2c_attach | ||
| }; | ||
|
|
||
| int ipmi_i2c_get_interface_caps(struct ipmi_i2c_softc *); | ||
| int ipmi_i2c_get_device_id(struct ipmi_i2c_softc *); | ||
|
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| int | ||
| ipmi_i2c_match(struct device *parent, void *match, void *aux) | ||
| { | ||
| struct i2c_attach_args *ia = aux; | ||
|
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| return (strcmp(ia->ia_name, "IPI0001") == 0 || | ||
| strcmp(ia->ia_name, "APMC0D8A") == 0); | ||
| } | ||
|
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| void | ||
| ipmi_i2c_attach(struct device *parent, struct device *self, void *aux) | ||
| { | ||
| struct ipmi_i2c_softc *sc = (struct ipmi_i2c_softc *)self; | ||
| struct i2c_attach_args *ia = aux; | ||
| struct ipmi_attach_args iaa; | ||
|
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| sc->sc_tag = ia->ia_tag; | ||
| sc->sc_addr = ia->ia_addr; | ||
| sc->sc.sc_if = &ssif_if; | ||
|
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| if (ipmi_i2c_get_interface_caps(sc)) { | ||
| printf(": can't get system interface capabilities\n"); | ||
| return; | ||
| } | ||
|
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| if (ipmi_i2c_get_device_id(sc)) { | ||
| printf(": can't get system interface capabilities\n"); | ||
| return; | ||
| } | ||
|
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| memset(&iaa, 0, sizeof(iaa)); | ||
| iaa.iaa_if_type = IPMI_IF_SSIF; | ||
| iaa.iaa_if_rev = (sc->sc_rev >> 4 | sc->sc_rev << 4); | ||
| iaa.iaa_if_irq = -1; | ||
| ipmi_attach_common(&sc->sc, &iaa); | ||
| } | ||
|
|
||
| int | ||
| ipmi_i2c_get_interface_caps(struct ipmi_i2c_softc *sc) | ||
| { | ||
| struct ipmi_cmd c; | ||
| uint8_t data[5]; | ||
|
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| data[0] = 0; /* SSIF */ | ||
|
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| c.c_sc = &sc->sc; | ||
| c.c_rssa = BMC_SA; | ||
| c.c_rslun = BMC_LUN; | ||
| c.c_netfn = APP_NETFN; | ||
| c.c_cmd = APP_GET_SYSTEM_INTERFACE_CAPS; | ||
| c.c_txlen = 1; | ||
| c.c_rxlen = 0; | ||
| c.c_maxrxlen = sizeof(data); | ||
| c.c_data = data; | ||
| if (ipmi_sendcmd(&c) || ipmi_recvcmd(&c)) | ||
| return EIO; | ||
|
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||
| /* Check SSIF version number. */ | ||
| if ((data[1] & 0x7) != 0) | ||
| return EINVAL; | ||
| /* Check input and output message sizes. */ | ||
| if (data[2] < 32 || data[3] < 32) | ||
| return EINVAL; | ||
|
|
||
| return 0; | ||
| } | ||
|
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| int | ||
| ipmi_i2c_get_device_id(struct ipmi_i2c_softc *sc) | ||
| { | ||
| struct ipmi_cmd c; | ||
| uint8_t data[16]; | ||
|
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| c.c_sc = &sc->sc; | ||
| c.c_rssa = BMC_SA; | ||
| c.c_rslun = BMC_LUN; | ||
| c.c_netfn = APP_NETFN; | ||
| c.c_cmd = APP_GET_DEVICE_ID; | ||
| c.c_txlen = 0; | ||
| c.c_rxlen = 0; | ||
| c.c_maxrxlen = sizeof(data); | ||
| c.c_data = data; | ||
| if (ipmi_sendcmd(&c) || ipmi_recvcmd(&c)) | ||
| return EIO; | ||
|
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| sc->sc_rev = data[4]; | ||
| return 0; | ||
| } | ||
|
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| int | ||
| ssif_sendmsg(struct ipmi_cmd *c) | ||
| { | ||
| struct ipmi_i2c_softc *sc = (struct ipmi_i2c_softc *)c->c_sc; | ||
| uint8_t *buf = sc->sc.sc_buf; | ||
| uint8_t cmd[2]; | ||
| int error, retry; | ||
|
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| /* We only support single-part writes. */ | ||
| if (c->c_txlen > 32) | ||
| return -1; | ||
|
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| iic_acquire_bus(sc->sc_tag, 0); | ||
|
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| while (retry--) { | ||
| cmd[0] = 2; | ||
| cmd[1] = c->c_txlen; | ||
| error = iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP, | ||
| sc->sc_addr, cmd, sizeof(cmd), buf, c->c_txlen, 0); | ||
| if (!error) | ||
| break; | ||
| } | ||
|
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| iic_release_bus(sc->sc_tag, 0); | ||
|
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| return (error ? -1 : 0); | ||
| } | ||
|
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| int | ||
| ssif_recvmsg(struct ipmi_cmd *c) | ||
| { | ||
| struct ipmi_i2c_softc *sc = (struct ipmi_i2c_softc *)c->c_sc; | ||
| uint8_t buf[IPMI_MAX_RX + 16]; | ||
| uint8_t cmd[1]; | ||
| int error, retry; | ||
|
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| /* We only support single-part reads. */ | ||
| if (c->c_maxrxlen > 32) | ||
| return -1; | ||
|
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| iic_acquire_bus(sc->sc_tag, 0); | ||
|
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| cmd[0] = 3; | ||
| for (retry = 0; retry < 250; retry++) { | ||
| memset(buf, 0, c->c_maxrxlen + 1); | ||
| error = iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, | ||
| sc->sc_addr, cmd, sizeof(cmd), buf, c->c_maxrxlen + 1, 0); | ||
| if (!error) { | ||
| c->c_rxlen = buf[0]; | ||
| memcpy(sc->sc.sc_buf, &buf[1], c->c_maxrxlen); | ||
| break; | ||
| } | ||
| } | ||
|
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| iic_release_bus(sc->sc_tag, 0); | ||
|
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| return (error ? -1 : 0); | ||
| } | ||
|
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| int | ||
| ssif_reset(struct ipmi_softc *sc) | ||
| { | ||
| return -1; | ||
| } | ||
|
|
||
| int | ||
| ssif_probe(struct ipmi_softc *sc) | ||
| { | ||
| return 0; | ||
| } |
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