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474086f8ff
Change-Id: I990bae6be548d117d12a69b3d5cda1c93abb238d Signed-off-by: Anastasia Klimchuk <aklm@flashrom.org> Reviewed-on: https://review.coreboot.org/c/flashrom/+/89938 Reviewed-by: Antonio Vázquez Blanco <antoniovazquezblanco@gmail.com> Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
144 lines
2.7 KiB
C
144 lines
2.7 KiB
C
/*
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* This file is part of the flashrom project.
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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* SPDX-FileCopyrightText: 2013 Rudolf Marek <r.marek@assembler.cz>
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* SPDX-FileCopyrightText: 2013 Stefan Tauner
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*/
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#include "programmer.h"
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#include "hwaccess_x86_io.h"
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#include "spi.h"
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#include "platform/pci.h"
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#include "platform/udelay.h"
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/* same as serverengines */
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static void enter_conf_mode_ec(uint16_t port)
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{
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OUTB(0x5a, port);
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}
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static void exit_conf_mode_ec(uint16_t port)
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{
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OUTB(0xa5, port);
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}
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static uint16_t get_sio_port(struct pci_dev *dev)
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{
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uint16_t ec_port;
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if (!dev) {
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return 0;
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}
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ec_port = pci_read_word(dev, 0xa4);
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/* EcPortActive? */
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if (!(ec_port & 0x1))
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return 0;
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ec_port &= ~0x1;
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return ec_port;
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}
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/* Wait for up to 10 ms for a response. */
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static int mbox_wait_ack(uint16_t mbox_port)
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{
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int i = 10;
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while (sio_read(mbox_port, 0x82) != 0xfa) {
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if (--i == 0) {
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msg_pwarn("IMC MBOX: Timeout!\n");
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return 1;
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}
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default_delay(1000);
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}
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return 0;
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}
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static uint16_t mbox_get_port(uint16_t sio_port)
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{
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uint16_t mbox_port;
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enter_conf_mode_ec(sio_port);
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/* Go to LDN 9, mailbox */
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sio_write(sio_port, 7, 9);
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/* MBOX inactive? */
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if ((sio_read(sio_port, 0x30) & 1) == 0) {
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exit_conf_mode_ec(sio_port);
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return 0;
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}
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mbox_port = sio_read(sio_port, 0x60) << 8;
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mbox_port |= sio_read(sio_port, 0x61);
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exit_conf_mode_ec(sio_port);
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return mbox_port;
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}
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/* Returns negative values when IMC is inactive, positive values on errors */
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static int imc_send_cmd(struct pci_dev *dev, uint8_t cmd)
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{
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uint16_t sio_port;
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uint16_t mbox_port;
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/* IntegratedEcPresent? */
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if (!(pci_read_byte(dev, 0x40) & (1 << 7)))
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return -1;
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sio_port = get_sio_port(dev);
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if (!sio_port)
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return -1;
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msg_pdbg2("IMC SIO is at 0x%x.\n", sio_port);
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mbox_port = mbox_get_port(sio_port);
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if (!mbox_port)
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return -1;
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msg_pdbg2("IMC MBOX is at 0x%x.\n", mbox_port);
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sio_write(mbox_port, 0x82, 0x0);
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sio_write(mbox_port, 0x83, cmd);
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sio_write(mbox_port, 0x84, 0x0);
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/* trigger transfer 0x96 with subcommand cmd */
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sio_write(mbox_port, 0x80, 0x96);
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return mbox_wait_ack(mbox_port);
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}
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static int imc_resume(void *data)
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{
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struct pci_dev *dev = data;
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int ret = imc_send_cmd(dev, 0xb5);
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if (ret != 0)
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msg_pinfo("Resuming IMC failed.\n");
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else
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msg_pdbg2("IMC resumed.\n");
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return ret;
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}
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int amd_imc_shutdown(struct pci_dev *dev)
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{
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/* Try to put IMC to sleep */
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int ret = imc_send_cmd(dev, 0xb4);
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/* No IMC activity detectable, assume we are fine */
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if (ret < 0) {
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msg_pdbg2("No IMC found.\n");
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return 0;
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}
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if (ret != 0) {
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msg_perr("Shutting down IMC failed.\n");
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return ret;
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}
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msg_pdbg2("Shutting down IMC successful.\n");
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if (register_shutdown(imc_resume, dev))
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return 1;
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return ret;
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}
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