6f7962b4d6
because we set it to edge-trigger.
1025 lines
29 KiB
C
1025 lines
29 KiB
C
/*-
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* Copyright (c) 2003-2007 Nate Lawson
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* Copyright (c) 2000 Michael Smith
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* Copyright (c) 2000 BSDi
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_acpi.h"
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/bus.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <sys/module.h>
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#include <sys/sx.h>
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#include <machine/bus.h>
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#include <machine/resource.h>
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#include <sys/rman.h>
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#include <contrib/dev/acpica/include/acpi.h>
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#include <contrib/dev/acpica/include/accommon.h>
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#include <dev/acpica/acpivar.h>
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/* Hooks for the ACPI CA debugging infrastructure */
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#define _COMPONENT ACPI_EC
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ACPI_MODULE_NAME("EC")
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/*
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* EC_COMMAND:
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* -----------
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*/
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typedef UINT8 EC_COMMAND;
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#define EC_COMMAND_UNKNOWN ((EC_COMMAND) 0x00)
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#define EC_COMMAND_READ ((EC_COMMAND) 0x80)
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#define EC_COMMAND_WRITE ((EC_COMMAND) 0x81)
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#define EC_COMMAND_BURST_ENABLE ((EC_COMMAND) 0x82)
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#define EC_COMMAND_BURST_DISABLE ((EC_COMMAND) 0x83)
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#define EC_COMMAND_QUERY ((EC_COMMAND) 0x84)
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/*
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* EC_STATUS:
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* ----------
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* The encoding of the EC status register is illustrated below.
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* Note that a set bit (1) indicates the property is TRUE
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* (e.g. if bit 0 is set then the output buffer is full).
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* +-+-+-+-+-+-+-+-+
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* |7|6|5|4|3|2|1|0|
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* +-+-+-+-+-+-+-+-+
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* | | | | | | | |
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* | | | | | | | +- Output Buffer Full?
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* | | | | | | +--- Input Buffer Full?
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* | | | | | +----- <reserved>
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* | | | | +------- Data Register is Command Byte?
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* | | | +--------- Burst Mode Enabled?
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* | | +----------- SCI Event?
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* | +------------- SMI Event?
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* +--------------- <reserved>
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*
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*/
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typedef UINT8 EC_STATUS;
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#define EC_FLAG_OUTPUT_BUFFER ((EC_STATUS) 0x01)
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#define EC_FLAG_INPUT_BUFFER ((EC_STATUS) 0x02)
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#define EC_FLAG_DATA_IS_CMD ((EC_STATUS) 0x08)
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#define EC_FLAG_BURST_MODE ((EC_STATUS) 0x10)
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/*
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* EC_EVENT:
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* ---------
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*/
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typedef UINT8 EC_EVENT;
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#define EC_EVENT_UNKNOWN ((EC_EVENT) 0x00)
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#define EC_EVENT_OUTPUT_BUFFER_FULL ((EC_EVENT) 0x01)
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#define EC_EVENT_INPUT_BUFFER_EMPTY ((EC_EVENT) 0x02)
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#define EC_EVENT_SCI ((EC_EVENT) 0x20)
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#define EC_EVENT_SMI ((EC_EVENT) 0x40)
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/* Data byte returned after burst enable indicating it was successful. */
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#define EC_BURST_ACK 0x90
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/*
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* Register access primitives
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*/
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#define EC_GET_DATA(sc) \
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bus_space_read_1((sc)->ec_data_tag, (sc)->ec_data_handle, 0)
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#define EC_SET_DATA(sc, v) \
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bus_space_write_1((sc)->ec_data_tag, (sc)->ec_data_handle, 0, (v))
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#define EC_GET_CSR(sc) \
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bus_space_read_1((sc)->ec_csr_tag, (sc)->ec_csr_handle, 0)
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#define EC_SET_CSR(sc, v) \
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bus_space_write_1((sc)->ec_csr_tag, (sc)->ec_csr_handle, 0, (v))
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/* Additional params to pass from the probe routine */
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struct acpi_ec_params {
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int glk;
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int gpe_bit;
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ACPI_HANDLE gpe_handle;
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int uid;
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};
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/*
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* Driver softc.
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*/
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struct acpi_ec_softc {
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device_t ec_dev;
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ACPI_HANDLE ec_handle;
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int ec_uid;
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ACPI_HANDLE ec_gpehandle;
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UINT8 ec_gpebit;
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int ec_data_rid;
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struct resource *ec_data_res;
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bus_space_tag_t ec_data_tag;
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bus_space_handle_t ec_data_handle;
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int ec_csr_rid;
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struct resource *ec_csr_res;
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bus_space_tag_t ec_csr_tag;
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bus_space_handle_t ec_csr_handle;
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int ec_glk;
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int ec_glkhandle;
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int ec_burstactive;
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int ec_sci_pend;
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volatile u_int ec_gencount;
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int ec_suspending;
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};
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/*
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* XXX njl
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* I couldn't find it in the spec but other implementations also use a
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* value of 1 ms for the time to acquire global lock.
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*/
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#define EC_LOCK_TIMEOUT 1000
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/* Default delay in microseconds between each run of the status polling loop. */
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#define EC_POLL_DELAY 50
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/* Total time in ms spent waiting for a response from EC. */
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#define EC_TIMEOUT 750
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#define EVENT_READY(event, status) \
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(((event) == EC_EVENT_OUTPUT_BUFFER_FULL && \
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((status) & EC_FLAG_OUTPUT_BUFFER) != 0) || \
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((event) == EC_EVENT_INPUT_BUFFER_EMPTY && \
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((status) & EC_FLAG_INPUT_BUFFER) == 0))
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ACPI_SERIAL_DECL(ec, "ACPI embedded controller");
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SYSCTL_DECL(_debug_acpi);
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SYSCTL_NODE(_debug_acpi, OID_AUTO, ec, CTLFLAG_RD, NULL, "EC debugging");
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static int ec_burst_mode;
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TUNABLE_INT("debug.acpi.ec.burst", &ec_burst_mode);
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SYSCTL_INT(_debug_acpi_ec, OID_AUTO, burst, CTLFLAG_RW, &ec_burst_mode, 0,
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"Enable use of burst mode (faster for nearly all systems)");
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static int ec_polled_mode;
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TUNABLE_INT("debug.acpi.ec.polled", &ec_polled_mode);
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SYSCTL_INT(_debug_acpi_ec, OID_AUTO, polled, CTLFLAG_RW, &ec_polled_mode, 0,
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"Force use of polled mode (only if interrupt mode doesn't work)");
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static int ec_timeout = EC_TIMEOUT;
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TUNABLE_INT("debug.acpi.ec.timeout", &ec_timeout);
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SYSCTL_INT(_debug_acpi_ec, OID_AUTO, timeout, CTLFLAG_RW, &ec_timeout,
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EC_TIMEOUT, "Total time spent waiting for a response (poll+sleep)");
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static ACPI_STATUS
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EcLock(struct acpi_ec_softc *sc)
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{
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ACPI_STATUS status;
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/* If _GLK is non-zero, acquire the global lock. */
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status = AE_OK;
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if (sc->ec_glk) {
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status = AcpiAcquireGlobalLock(EC_LOCK_TIMEOUT, &sc->ec_glkhandle);
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if (ACPI_FAILURE(status))
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return (status);
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}
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ACPI_SERIAL_BEGIN(ec);
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return (status);
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}
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static void
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EcUnlock(struct acpi_ec_softc *sc)
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{
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ACPI_SERIAL_END(ec);
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if (sc->ec_glk)
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AcpiReleaseGlobalLock(sc->ec_glkhandle);
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}
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static UINT32 EcGpeHandler(ACPI_HANDLE, UINT32, void *);
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static ACPI_STATUS EcSpaceSetup(ACPI_HANDLE Region, UINT32 Function,
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void *Context, void **return_Context);
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static ACPI_STATUS EcSpaceHandler(UINT32 Function,
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ACPI_PHYSICAL_ADDRESS Address,
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UINT32 Width, UINT64 *Value,
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void *Context, void *RegionContext);
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static ACPI_STATUS EcWaitEvent(struct acpi_ec_softc *sc, EC_EVENT Event,
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u_int gen_count);
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static ACPI_STATUS EcCommand(struct acpi_ec_softc *sc, EC_COMMAND cmd);
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static ACPI_STATUS EcRead(struct acpi_ec_softc *sc, UINT8 Address,
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UINT8 *Data);
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static ACPI_STATUS EcWrite(struct acpi_ec_softc *sc, UINT8 Address,
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UINT8 Data);
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static int acpi_ec_probe(device_t dev);
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static int acpi_ec_attach(device_t dev);
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static int acpi_ec_suspend(device_t dev);
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static int acpi_ec_resume(device_t dev);
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static int acpi_ec_shutdown(device_t dev);
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static int acpi_ec_read_method(device_t dev, u_int addr,
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UINT64 *val, int width);
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static int acpi_ec_write_method(device_t dev, u_int addr,
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UINT64 val, int width);
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static device_method_t acpi_ec_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, acpi_ec_probe),
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DEVMETHOD(device_attach, acpi_ec_attach),
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DEVMETHOD(device_suspend, acpi_ec_suspend),
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DEVMETHOD(device_resume, acpi_ec_resume),
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DEVMETHOD(device_shutdown, acpi_ec_shutdown),
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/* Embedded controller interface */
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DEVMETHOD(acpi_ec_read, acpi_ec_read_method),
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DEVMETHOD(acpi_ec_write, acpi_ec_write_method),
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{0, 0}
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};
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static driver_t acpi_ec_driver = {
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"acpi_ec",
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acpi_ec_methods,
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sizeof(struct acpi_ec_softc),
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};
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static devclass_t acpi_ec_devclass;
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DRIVER_MODULE(acpi_ec, acpi, acpi_ec_driver, acpi_ec_devclass, 0, 0);
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MODULE_DEPEND(acpi_ec, acpi, 1, 1, 1);
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/*
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* Look for an ECDT and if we find one, set up default GPE and
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* space handlers to catch attempts to access EC space before
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* we have a real driver instance in place.
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*
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* TODO: Some old Gateway laptops need us to fake up an ECDT or
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* otherwise attach early so that _REG methods can run.
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*/
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void
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acpi_ec_ecdt_probe(device_t parent)
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{
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ACPI_TABLE_ECDT *ecdt;
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ACPI_STATUS status;
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device_t child;
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ACPI_HANDLE h;
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struct acpi_ec_params *params;
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ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
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/* Find and validate the ECDT. */
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status = AcpiGetTable(ACPI_SIG_ECDT, 1, (ACPI_TABLE_HEADER **)&ecdt);
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if (ACPI_FAILURE(status) ||
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ecdt->Control.BitWidth != 8 ||
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ecdt->Data.BitWidth != 8) {
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return;
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}
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/* Create the child device with the given unit number. */
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child = BUS_ADD_CHILD(parent, 0, "acpi_ec", ecdt->Uid);
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if (child == NULL) {
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printf("%s: can't add child\n", __func__);
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return;
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}
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/* Find and save the ACPI handle for this device. */
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status = AcpiGetHandle(NULL, ecdt->Id, &h);
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if (ACPI_FAILURE(status)) {
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device_delete_child(parent, child);
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printf("%s: can't get handle\n", __func__);
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return;
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}
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acpi_set_handle(child, h);
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/* Set the data and CSR register addresses. */
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bus_set_resource(child, SYS_RES_IOPORT, 0, ecdt->Data.Address,
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/*count*/1);
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bus_set_resource(child, SYS_RES_IOPORT, 1, ecdt->Control.Address,
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/*count*/1);
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/*
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* Store values for the probe/attach routines to use. Store the
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* ECDT GPE bit and set the global lock flag according to _GLK.
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* Note that it is not perfectly correct to be evaluating a method
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* before initializing devices, but in practice this function
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* should be safe to call at this point.
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*/
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params = malloc(sizeof(struct acpi_ec_params), M_TEMP, M_WAITOK | M_ZERO);
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params->gpe_handle = NULL;
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params->gpe_bit = ecdt->Gpe;
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params->uid = ecdt->Uid;
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acpi_GetInteger(h, "_GLK", ¶ms->glk);
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acpi_set_private(child, params);
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/* Finish the attach process. */
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if (device_probe_and_attach(child) != 0)
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device_delete_child(parent, child);
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}
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static int
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acpi_ec_probe(device_t dev)
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{
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ACPI_BUFFER buf;
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ACPI_HANDLE h;
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ACPI_OBJECT *obj;
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ACPI_STATUS status;
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device_t peer;
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char desc[64];
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int ecdt;
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int ret;
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struct acpi_ec_params *params;
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static char *ec_ids[] = { "PNP0C09", NULL };
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/* Check that this is a device and that EC is not disabled. */
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if (acpi_get_type(dev) != ACPI_TYPE_DEVICE || acpi_disabled("ec"))
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return (ENXIO);
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/*
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* If probed via ECDT, set description and continue. Otherwise,
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* we can access the namespace and make sure this is not a
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* duplicate probe.
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*/
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ret = ENXIO;
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ecdt = 0;
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buf.Pointer = NULL;
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buf.Length = ACPI_ALLOCATE_BUFFER;
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params = acpi_get_private(dev);
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if (params != NULL) {
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ecdt = 1;
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ret = 0;
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} else if (ACPI_ID_PROBE(device_get_parent(dev), dev, ec_ids)) {
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params = malloc(sizeof(struct acpi_ec_params), M_TEMP,
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M_WAITOK | M_ZERO);
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h = acpi_get_handle(dev);
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/*
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* Read the unit ID to check for duplicate attach and the
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* global lock value to see if we should acquire it when
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* accessing the EC.
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*/
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status = acpi_GetInteger(h, "_UID", ¶ms->uid);
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if (ACPI_FAILURE(status))
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params->uid = 0;
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status = acpi_GetInteger(h, "_GLK", ¶ms->glk);
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if (ACPI_FAILURE(status))
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params->glk = 0;
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/*
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* Evaluate the _GPE method to find the GPE bit used by the EC to
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* signal status (SCI). If it's a package, it contains a reference
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* and GPE bit, similar to _PRW.
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*/
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status = AcpiEvaluateObject(h, "_GPE", NULL, &buf);
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if (ACPI_FAILURE(status)) {
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device_printf(dev, "can't evaluate _GPE - %s\n",
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AcpiFormatException(status));
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goto out;
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}
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obj = (ACPI_OBJECT *)buf.Pointer;
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if (obj == NULL)
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goto out;
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switch (obj->Type) {
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case ACPI_TYPE_INTEGER:
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params->gpe_handle = NULL;
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params->gpe_bit = obj->Integer.Value;
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break;
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case ACPI_TYPE_PACKAGE:
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if (!ACPI_PKG_VALID(obj, 2))
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goto out;
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params->gpe_handle =
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acpi_GetReference(NULL, &obj->Package.Elements[0]);
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if (params->gpe_handle == NULL ||
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acpi_PkgInt32(obj, 1, ¶ms->gpe_bit) != 0)
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goto out;
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break;
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default:
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device_printf(dev, "_GPE has invalid type %d\n", obj->Type);
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goto out;
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}
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/* Store the values we got from the namespace for attach. */
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acpi_set_private(dev, params);
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|
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/*
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* Check for a duplicate probe. This can happen when a probe
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* via ECDT succeeded already. If this is a duplicate, disable
|
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* this device.
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*/
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peer = devclass_get_device(acpi_ec_devclass, params->uid);
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if (peer == NULL || !device_is_alive(peer))
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ret = 0;
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else
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device_disable(dev);
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}
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out:
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if (ret == 0) {
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snprintf(desc, sizeof(desc), "Embedded Controller: GPE %#x%s%s",
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params->gpe_bit, (params->glk) ? ", GLK" : "",
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ecdt ? ", ECDT" : "");
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device_set_desc_copy(dev, desc);
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}
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|
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if (ret > 0 && params)
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free(params, M_TEMP);
|
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if (buf.Pointer)
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AcpiOsFree(buf.Pointer);
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return (ret);
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}
|
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|
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static int
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acpi_ec_attach(device_t dev)
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{
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struct acpi_ec_softc *sc;
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struct acpi_ec_params *params;
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ACPI_STATUS Status;
|
|
|
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ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
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|
|
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/* Fetch/initialize softc (assumes softc is pre-zeroed). */
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sc = device_get_softc(dev);
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params = acpi_get_private(dev);
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sc->ec_dev = dev;
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sc->ec_handle = acpi_get_handle(dev);
|
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|
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/* Retrieve previously probed values via device ivars. */
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sc->ec_glk = params->glk;
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sc->ec_gpebit = params->gpe_bit;
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sc->ec_gpehandle = params->gpe_handle;
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sc->ec_uid = params->uid;
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sc->ec_suspending = FALSE;
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acpi_set_private(dev, NULL);
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free(params, M_TEMP);
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|
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/* Attach bus resources for data and command/status ports. */
|
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sc->ec_data_rid = 0;
|
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sc->ec_data_res = bus_alloc_resource_any(sc->ec_dev, SYS_RES_IOPORT,
|
|
&sc->ec_data_rid, RF_ACTIVE);
|
|
if (sc->ec_data_res == NULL) {
|
|
device_printf(dev, "can't allocate data port\n");
|
|
goto error;
|
|
}
|
|
sc->ec_data_tag = rman_get_bustag(sc->ec_data_res);
|
|
sc->ec_data_handle = rman_get_bushandle(sc->ec_data_res);
|
|
|
|
sc->ec_csr_rid = 1;
|
|
sc->ec_csr_res = bus_alloc_resource_any(sc->ec_dev, SYS_RES_IOPORT,
|
|
&sc->ec_csr_rid, RF_ACTIVE);
|
|
if (sc->ec_csr_res == NULL) {
|
|
device_printf(dev, "can't allocate command/status port\n");
|
|
goto error;
|
|
}
|
|
sc->ec_csr_tag = rman_get_bustag(sc->ec_csr_res);
|
|
sc->ec_csr_handle = rman_get_bushandle(sc->ec_csr_res);
|
|
|
|
/*
|
|
* Install a handler for this EC's GPE bit. We want edge-triggered
|
|
* behavior.
|
|
*/
|
|
ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "attaching GPE handler\n"));
|
|
Status = AcpiInstallGpeHandler(sc->ec_gpehandle, sc->ec_gpebit,
|
|
ACPI_GPE_EDGE_TRIGGERED, EcGpeHandler, sc);
|
|
if (ACPI_FAILURE(Status)) {
|
|
device_printf(dev, "can't install GPE handler for %s - %s\n",
|
|
acpi_name(sc->ec_handle), AcpiFormatException(Status));
|
|
goto error;
|
|
}
|
|
|
|
/*
|
|
* Install address space handler
|
|
*/
|
|
ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "attaching address space handler\n"));
|
|
Status = AcpiInstallAddressSpaceHandler(sc->ec_handle, ACPI_ADR_SPACE_EC,
|
|
&EcSpaceHandler, &EcSpaceSetup, sc);
|
|
if (ACPI_FAILURE(Status)) {
|
|
device_printf(dev, "can't install address space handler for %s - %s\n",
|
|
acpi_name(sc->ec_handle), AcpiFormatException(Status));
|
|
goto error;
|
|
}
|
|
|
|
/* Enable runtime GPEs for the handler. */
|
|
Status = AcpiEnableGpe(sc->ec_gpehandle, sc->ec_gpebit);
|
|
if (ACPI_FAILURE(Status)) {
|
|
device_printf(dev, "AcpiEnableGpe failed: %s\n",
|
|
AcpiFormatException(Status));
|
|
goto error;
|
|
}
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "acpi_ec_attach complete\n"));
|
|
return (0);
|
|
|
|
error:
|
|
AcpiRemoveGpeHandler(sc->ec_gpehandle, sc->ec_gpebit, EcGpeHandler);
|
|
AcpiRemoveAddressSpaceHandler(sc->ec_handle, ACPI_ADR_SPACE_EC,
|
|
EcSpaceHandler);
|
|
if (sc->ec_csr_res)
|
|
bus_release_resource(sc->ec_dev, SYS_RES_IOPORT, sc->ec_csr_rid,
|
|
sc->ec_csr_res);
|
|
if (sc->ec_data_res)
|
|
bus_release_resource(sc->ec_dev, SYS_RES_IOPORT, sc->ec_data_rid,
|
|
sc->ec_data_res);
|
|
return (ENXIO);
|
|
}
|
|
|
|
static int
|
|
acpi_ec_suspend(device_t dev)
|
|
{
|
|
struct acpi_ec_softc *sc;
|
|
|
|
sc = device_get_softc(dev);
|
|
sc->ec_suspending = TRUE;
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
acpi_ec_resume(device_t dev)
|
|
{
|
|
struct acpi_ec_softc *sc;
|
|
|
|
sc = device_get_softc(dev);
|
|
sc->ec_suspending = FALSE;
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
acpi_ec_shutdown(device_t dev)
|
|
{
|
|
struct acpi_ec_softc *sc;
|
|
|
|
/* Disable the GPE so we don't get EC events during shutdown. */
|
|
sc = device_get_softc(dev);
|
|
AcpiDisableGpe(sc->ec_gpehandle, sc->ec_gpebit);
|
|
return (0);
|
|
}
|
|
|
|
/* Methods to allow other devices (e.g., smbat) to read/write EC space. */
|
|
static int
|
|
acpi_ec_read_method(device_t dev, u_int addr, UINT64 *val, int width)
|
|
{
|
|
struct acpi_ec_softc *sc;
|
|
ACPI_STATUS status;
|
|
|
|
sc = device_get_softc(dev);
|
|
status = EcSpaceHandler(ACPI_READ, addr, width * 8, val, sc, NULL);
|
|
if (ACPI_FAILURE(status))
|
|
return (ENXIO);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
acpi_ec_write_method(device_t dev, u_int addr, UINT64 val, int width)
|
|
{
|
|
struct acpi_ec_softc *sc;
|
|
ACPI_STATUS status;
|
|
|
|
sc = device_get_softc(dev);
|
|
status = EcSpaceHandler(ACPI_WRITE, addr, width * 8, &val, sc, NULL);
|
|
if (ACPI_FAILURE(status))
|
|
return (ENXIO);
|
|
return (0);
|
|
}
|
|
|
|
static ACPI_STATUS
|
|
EcCheckStatus(struct acpi_ec_softc *sc, const char *msg, EC_EVENT event)
|
|
{
|
|
ACPI_STATUS status;
|
|
EC_STATUS ec_status;
|
|
|
|
status = AE_NO_HARDWARE_RESPONSE;
|
|
ec_status = EC_GET_CSR(sc);
|
|
if (sc->ec_burstactive && !(ec_status & EC_FLAG_BURST_MODE)) {
|
|
CTR1(KTR_ACPI, "ec burst disabled in waitevent (%s)", msg);
|
|
sc->ec_burstactive = FALSE;
|
|
}
|
|
if (EVENT_READY(event, ec_status)) {
|
|
CTR2(KTR_ACPI, "ec %s wait ready, status %#x", msg, ec_status);
|
|
status = AE_OK;
|
|
}
|
|
return (status);
|
|
}
|
|
|
|
static void
|
|
EcGpeQueryHandler(void *Context)
|
|
{
|
|
struct acpi_ec_softc *sc = (struct acpi_ec_softc *)Context;
|
|
UINT8 Data;
|
|
ACPI_STATUS Status;
|
|
int retry, sci_enqueued;
|
|
char qxx[5];
|
|
|
|
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
|
|
KASSERT(Context != NULL, ("EcGpeQueryHandler called with NULL"));
|
|
|
|
/* Serialize user access with EcSpaceHandler(). */
|
|
Status = EcLock(sc);
|
|
if (ACPI_FAILURE(Status)) {
|
|
device_printf(sc->ec_dev, "GpeQuery lock error: %s\n",
|
|
AcpiFormatException(Status));
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Send a query command to the EC to find out which _Qxx call it
|
|
* wants to make. This command clears the SCI bit and also the
|
|
* interrupt source since we are edge-triggered. To prevent the GPE
|
|
* that may arise from running the query from causing another query
|
|
* to be queued, we clear the pending flag only after running it.
|
|
*/
|
|
sci_enqueued = sc->ec_sci_pend;
|
|
for (retry = 0; retry < 2; retry++) {
|
|
Status = EcCommand(sc, EC_COMMAND_QUERY);
|
|
if (ACPI_SUCCESS(Status))
|
|
break;
|
|
if (EcCheckStatus(sc, "retr_check",
|
|
EC_EVENT_INPUT_BUFFER_EMPTY) == AE_OK)
|
|
continue;
|
|
else
|
|
break;
|
|
}
|
|
sc->ec_sci_pend = FALSE;
|
|
if (ACPI_FAILURE(Status)) {
|
|
EcUnlock(sc);
|
|
device_printf(sc->ec_dev, "GPE query failed: %s\n",
|
|
AcpiFormatException(Status));
|
|
return;
|
|
}
|
|
Data = EC_GET_DATA(sc);
|
|
|
|
/*
|
|
* We have to unlock before running the _Qxx method below since that
|
|
* method may attempt to read/write from EC address space, causing
|
|
* recursive acquisition of the lock.
|
|
*/
|
|
EcUnlock(sc);
|
|
|
|
/* Ignore the value for "no outstanding event". (13.3.5) */
|
|
CTR2(KTR_ACPI, "ec query ok,%s running _Q%02X", Data ? "" : " not", Data);
|
|
if (Data == 0)
|
|
return;
|
|
|
|
/* Evaluate _Qxx to respond to the controller. */
|
|
snprintf(qxx, sizeof(qxx), "_Q%02X", Data);
|
|
AcpiUtStrupr(qxx);
|
|
Status = AcpiEvaluateObject(sc->ec_handle, qxx, NULL, NULL);
|
|
if (ACPI_FAILURE(Status) && Status != AE_NOT_FOUND) {
|
|
device_printf(sc->ec_dev, "evaluation of query method %s failed: %s\n",
|
|
qxx, AcpiFormatException(Status));
|
|
}
|
|
|
|
/* Reenable runtime GPE if its execution was deferred. */
|
|
if (sci_enqueued) {
|
|
Status = AcpiFinishGpe(sc->ec_gpehandle, sc->ec_gpebit);
|
|
if (ACPI_FAILURE(Status))
|
|
device_printf(sc->ec_dev, "reenabling runtime GPE failed: %s\n",
|
|
AcpiFormatException(Status));
|
|
}
|
|
}
|
|
|
|
/*
|
|
* The GPE handler is called when IBE/OBF or SCI events occur. We are
|
|
* called from an unknown lock context.
|
|
*/
|
|
static UINT32
|
|
EcGpeHandler(ACPI_HANDLE GpeDevice, UINT32 GpeNumber, void *Context)
|
|
{
|
|
struct acpi_ec_softc *sc = Context;
|
|
ACPI_STATUS Status;
|
|
EC_STATUS EcStatus;
|
|
|
|
KASSERT(Context != NULL, ("EcGpeHandler called with NULL"));
|
|
CTR0(KTR_ACPI, "ec gpe handler start");
|
|
|
|
/*
|
|
* Notify EcWaitEvent() that the status register is now fresh. If we
|
|
* didn't do this, it wouldn't be possible to distinguish an old IBE
|
|
* from a new one, for example when doing a write transaction (writing
|
|
* address and then data values.)
|
|
*/
|
|
atomic_add_int(&sc->ec_gencount, 1);
|
|
wakeup(sc);
|
|
|
|
/*
|
|
* If the EC_SCI bit of the status register is set, queue a query handler.
|
|
* It will run the query and _Qxx method later, under the lock.
|
|
*/
|
|
EcStatus = EC_GET_CSR(sc);
|
|
if ((EcStatus & EC_EVENT_SCI) && !sc->ec_sci_pend) {
|
|
CTR0(KTR_ACPI, "ec gpe queueing query handler");
|
|
Status = AcpiOsExecute(OSL_GPE_HANDLER, EcGpeQueryHandler, Context);
|
|
if (ACPI_SUCCESS(Status)) {
|
|
sc->ec_sci_pend = TRUE;
|
|
return (0);
|
|
} else
|
|
printf("EcGpeHandler: queuing GPE query handler failed\n");
|
|
}
|
|
return (ACPI_REENABLE_GPE);
|
|
}
|
|
|
|
static ACPI_STATUS
|
|
EcSpaceSetup(ACPI_HANDLE Region, UINT32 Function, void *Context,
|
|
void **RegionContext)
|
|
{
|
|
|
|
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
|
|
|
|
/*
|
|
* If deactivating a region, always set the output to NULL. Otherwise,
|
|
* just pass the context through.
|
|
*/
|
|
if (Function == ACPI_REGION_DEACTIVATE)
|
|
*RegionContext = NULL;
|
|
else
|
|
*RegionContext = Context;
|
|
|
|
return_ACPI_STATUS (AE_OK);
|
|
}
|
|
|
|
static ACPI_STATUS
|
|
EcSpaceHandler(UINT32 Function, ACPI_PHYSICAL_ADDRESS Address, UINT32 Width,
|
|
UINT64 *Value, void *Context, void *RegionContext)
|
|
{
|
|
struct acpi_ec_softc *sc = (struct acpi_ec_softc *)Context;
|
|
ACPI_PHYSICAL_ADDRESS EcAddr;
|
|
UINT8 *EcData;
|
|
ACPI_STATUS Status;
|
|
|
|
ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, (UINT32)Address);
|
|
|
|
if (Function != ACPI_READ && Function != ACPI_WRITE)
|
|
return_ACPI_STATUS (AE_BAD_PARAMETER);
|
|
if (Width % 8 != 0 || Value == NULL || Context == NULL)
|
|
return_ACPI_STATUS (AE_BAD_PARAMETER);
|
|
if (Address + Width / 8 > 256)
|
|
return_ACPI_STATUS (AE_BAD_ADDRESS);
|
|
|
|
/*
|
|
* If booting, check if we need to run the query handler. If so, we
|
|
* we call it directly here since our thread taskq is not active yet.
|
|
*/
|
|
if (cold || rebooting || sc->ec_suspending) {
|
|
if ((EC_GET_CSR(sc) & EC_EVENT_SCI)) {
|
|
CTR0(KTR_ACPI, "ec running gpe handler directly");
|
|
EcGpeQueryHandler(sc);
|
|
}
|
|
}
|
|
|
|
/* Serialize with EcGpeQueryHandler() at transaction granularity. */
|
|
Status = EcLock(sc);
|
|
if (ACPI_FAILURE(Status))
|
|
return_ACPI_STATUS (Status);
|
|
|
|
/* If we can't start burst mode, continue anyway. */
|
|
Status = EcCommand(sc, EC_COMMAND_BURST_ENABLE);
|
|
if (ACPI_SUCCESS(Status)) {
|
|
if (EC_GET_DATA(sc) == EC_BURST_ACK) {
|
|
CTR0(KTR_ACPI, "ec burst enabled");
|
|
sc->ec_burstactive = TRUE;
|
|
}
|
|
}
|
|
|
|
/* Perform the transaction(s), based on Width. */
|
|
EcAddr = Address;
|
|
EcData = (UINT8 *)Value;
|
|
if (Function == ACPI_READ)
|
|
*Value = 0;
|
|
do {
|
|
switch (Function) {
|
|
case ACPI_READ:
|
|
Status = EcRead(sc, EcAddr, EcData);
|
|
break;
|
|
case ACPI_WRITE:
|
|
Status = EcWrite(sc, EcAddr, *EcData);
|
|
break;
|
|
}
|
|
if (ACPI_FAILURE(Status))
|
|
break;
|
|
EcAddr++;
|
|
EcData++;
|
|
} while (EcAddr < Address + Width / 8);
|
|
|
|
if (sc->ec_burstactive) {
|
|
sc->ec_burstactive = FALSE;
|
|
if (ACPI_SUCCESS(EcCommand(sc, EC_COMMAND_BURST_DISABLE)))
|
|
CTR0(KTR_ACPI, "ec disabled burst ok");
|
|
}
|
|
|
|
EcUnlock(sc);
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
static ACPI_STATUS
|
|
EcWaitEvent(struct acpi_ec_softc *sc, EC_EVENT Event, u_int gen_count)
|
|
{
|
|
static int no_intr = 0;
|
|
ACPI_STATUS Status;
|
|
int count, i, need_poll, slp_ival;
|
|
|
|
ACPI_SERIAL_ASSERT(ec);
|
|
Status = AE_NO_HARDWARE_RESPONSE;
|
|
need_poll = cold || rebooting || ec_polled_mode || sc->ec_suspending;
|
|
|
|
/* Wait for event by polling or GPE (interrupt). */
|
|
if (need_poll) {
|
|
count = (ec_timeout * 1000) / EC_POLL_DELAY;
|
|
if (count == 0)
|
|
count = 1;
|
|
DELAY(10);
|
|
for (i = 0; i < count; i++) {
|
|
Status = EcCheckStatus(sc, "poll", Event);
|
|
if (Status == AE_OK)
|
|
break;
|
|
DELAY(EC_POLL_DELAY);
|
|
}
|
|
} else {
|
|
slp_ival = hz / 1000;
|
|
if (slp_ival != 0) {
|
|
count = ec_timeout;
|
|
} else {
|
|
/* hz has less than 1 ms resolution so scale timeout. */
|
|
slp_ival = 1;
|
|
count = ec_timeout / (1000 / hz);
|
|
}
|
|
|
|
/*
|
|
* Wait for the GPE to signal the status changed, checking the
|
|
* status register each time we get one. It's possible to get a
|
|
* GPE for an event we're not interested in here (i.e., SCI for
|
|
* EC query).
|
|
*/
|
|
for (i = 0; i < count; i++) {
|
|
if (gen_count == sc->ec_gencount)
|
|
tsleep(sc, 0, "ecgpe", slp_ival);
|
|
/*
|
|
* Record new generation count. It's possible the GPE was
|
|
* just to notify us that a query is needed and we need to
|
|
* wait for a second GPE to signal the completion of the
|
|
* event we are actually waiting for.
|
|
*/
|
|
Status = EcCheckStatus(sc, "sleep", Event);
|
|
if (Status == AE_OK) {
|
|
if (gen_count == sc->ec_gencount)
|
|
no_intr++;
|
|
else
|
|
no_intr = 0;
|
|
break;
|
|
}
|
|
gen_count = sc->ec_gencount;
|
|
}
|
|
|
|
/*
|
|
* We finished waiting for the GPE and it never arrived. Try to
|
|
* read the register once and trust whatever value we got. This is
|
|
* the best we can do at this point.
|
|
*/
|
|
if (Status != AE_OK)
|
|
Status = EcCheckStatus(sc, "sleep_end", Event);
|
|
}
|
|
if (!need_poll && no_intr > 10) {
|
|
device_printf(sc->ec_dev,
|
|
"not getting interrupts, switched to polled mode\n");
|
|
ec_polled_mode = 1;
|
|
}
|
|
if (Status != AE_OK)
|
|
CTR0(KTR_ACPI, "error: ec wait timed out");
|
|
return (Status);
|
|
}
|
|
|
|
static ACPI_STATUS
|
|
EcCommand(struct acpi_ec_softc *sc, EC_COMMAND cmd)
|
|
{
|
|
ACPI_STATUS status;
|
|
EC_EVENT event;
|
|
EC_STATUS ec_status;
|
|
u_int gen_count;
|
|
|
|
ACPI_SERIAL_ASSERT(ec);
|
|
|
|
/* Don't use burst mode if user disabled it. */
|
|
if (!ec_burst_mode && cmd == EC_COMMAND_BURST_ENABLE)
|
|
return (AE_ERROR);
|
|
|
|
/* Decide what to wait for based on command type. */
|
|
switch (cmd) {
|
|
case EC_COMMAND_READ:
|
|
case EC_COMMAND_WRITE:
|
|
case EC_COMMAND_BURST_DISABLE:
|
|
event = EC_EVENT_INPUT_BUFFER_EMPTY;
|
|
break;
|
|
case EC_COMMAND_QUERY:
|
|
case EC_COMMAND_BURST_ENABLE:
|
|
event = EC_EVENT_OUTPUT_BUFFER_FULL;
|
|
break;
|
|
default:
|
|
device_printf(sc->ec_dev, "EcCommand: invalid command %#x\n", cmd);
|
|
return (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
/*
|
|
* Ensure empty input buffer before issuing command.
|
|
* Use generation count of zero to force a quick check.
|
|
*/
|
|
status = EcWaitEvent(sc, EC_EVENT_INPUT_BUFFER_EMPTY, 0);
|
|
if (ACPI_FAILURE(status))
|
|
return (status);
|
|
|
|
/* Run the command and wait for the chosen event. */
|
|
CTR1(KTR_ACPI, "ec running command %#x", cmd);
|
|
gen_count = sc->ec_gencount;
|
|
EC_SET_CSR(sc, cmd);
|
|
status = EcWaitEvent(sc, event, gen_count);
|
|
if (ACPI_SUCCESS(status)) {
|
|
/* If we succeeded, burst flag should now be present. */
|
|
if (cmd == EC_COMMAND_BURST_ENABLE) {
|
|
ec_status = EC_GET_CSR(sc);
|
|
if ((ec_status & EC_FLAG_BURST_MODE) == 0)
|
|
status = AE_ERROR;
|
|
}
|
|
} else
|
|
device_printf(sc->ec_dev, "EcCommand: no response to %#x\n", cmd);
|
|
return (status);
|
|
}
|
|
|
|
static ACPI_STATUS
|
|
EcRead(struct acpi_ec_softc *sc, UINT8 Address, UINT8 *Data)
|
|
{
|
|
ACPI_STATUS status;
|
|
u_int gen_count;
|
|
int retry;
|
|
|
|
ACPI_SERIAL_ASSERT(ec);
|
|
CTR1(KTR_ACPI, "ec read from %#x", Address);
|
|
|
|
for (retry = 0; retry < 2; retry++) {
|
|
status = EcCommand(sc, EC_COMMAND_READ);
|
|
if (ACPI_FAILURE(status))
|
|
return (status);
|
|
|
|
gen_count = sc->ec_gencount;
|
|
EC_SET_DATA(sc, Address);
|
|
status = EcWaitEvent(sc, EC_EVENT_OUTPUT_BUFFER_FULL, gen_count);
|
|
if (ACPI_FAILURE(status)) {
|
|
if (EcCheckStatus(sc, "retr_check",
|
|
EC_EVENT_INPUT_BUFFER_EMPTY) == AE_OK)
|
|
continue;
|
|
else
|
|
break;
|
|
}
|
|
*Data = EC_GET_DATA(sc);
|
|
return (AE_OK);
|
|
}
|
|
device_printf(sc->ec_dev, "EcRead: failed waiting to get data\n");
|
|
return (status);
|
|
}
|
|
|
|
static ACPI_STATUS
|
|
EcWrite(struct acpi_ec_softc *sc, UINT8 Address, UINT8 Data)
|
|
{
|
|
ACPI_STATUS status;
|
|
u_int gen_count;
|
|
|
|
ACPI_SERIAL_ASSERT(ec);
|
|
CTR2(KTR_ACPI, "ec write to %#x, data %#x", Address, Data);
|
|
|
|
status = EcCommand(sc, EC_COMMAND_WRITE);
|
|
if (ACPI_FAILURE(status))
|
|
return (status);
|
|
|
|
gen_count = sc->ec_gencount;
|
|
EC_SET_DATA(sc, Address);
|
|
status = EcWaitEvent(sc, EC_EVENT_INPUT_BUFFER_EMPTY, gen_count);
|
|
if (ACPI_FAILURE(status)) {
|
|
device_printf(sc->ec_dev, "EcWrite: failed waiting for sent address\n");
|
|
return (status);
|
|
}
|
|
|
|
gen_count = sc->ec_gencount;
|
|
EC_SET_DATA(sc, Data);
|
|
status = EcWaitEvent(sc, EC_EVENT_INPUT_BUFFER_EMPTY, gen_count);
|
|
if (ACPI_FAILURE(status)) {
|
|
device_printf(sc->ec_dev, "EcWrite: failed waiting for sent data\n");
|
|
return (status);
|
|
}
|
|
|
|
return (AE_OK);
|
|
}
|