mirror of
https://github.com/smaeul/u-boot.git
synced 2025-11-04 05:50:17 +00:00
b697b848e8
Provide a way to determine the HSIO (high-speed I/O) version supported by the Intel Management Engine (ME) implementation on the platform. Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Bin Meng <bmeng.cn@gmail.com>
58 lines
1.3 KiB
C
58 lines
1.3 KiB
C
/*
|
|
* Copyright (c) 2016 Google, Inc
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0
|
|
*
|
|
* Based on code from coreboot src/soc/intel/broadwell/me_status.c
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <errno.h>
|
|
#include <asm/arch/me.h>
|
|
|
|
static inline void me_read_dword_ptr(struct udevice *dev, void *ptr, int offset)
|
|
{
|
|
u32 dword;
|
|
|
|
dm_pci_read_config32(dev, offset, &dword);
|
|
memcpy(ptr, &dword, sizeof(dword));
|
|
}
|
|
|
|
int intel_me_hsio_version(struct udevice *dev, uint16_t *versionp,
|
|
uint16_t *checksump)
|
|
{
|
|
int count;
|
|
u32 hsiover;
|
|
struct me_hfs hfs;
|
|
|
|
/* Query for HSIO version, overloads H_GS and HFS */
|
|
dm_pci_write_config32(dev, PCI_ME_H_GS,
|
|
ME_HSIO_MESSAGE | ME_HSIO_CMD_GETHSIOVER);
|
|
|
|
/* Must wait for ME acknowledgement */
|
|
for (count = ME_RETRY; count > 0; --count) {
|
|
me_read_dword_ptr(dev, &hfs, PCI_ME_HFS);
|
|
if (hfs.bios_msg_ack)
|
|
break;
|
|
udelay(ME_DELAY);
|
|
}
|
|
if (!count) {
|
|
debug("ERROR: ME failed to respond\n");
|
|
return -ETIMEDOUT;
|
|
}
|
|
|
|
/* HSIO version should be in HFS_5 */
|
|
dm_pci_read_config32(dev, PCI_ME_HFS5, &hsiover);
|
|
*versionp = hsiover >> 16;
|
|
*checksump = hsiover & 0xffff;
|
|
|
|
debug("ME: HSIO Version : %d (CRC 0x%04x)\n",
|
|
*versionp, *checksump);
|
|
|
|
/* Reset registers to normal behavior */
|
|
dm_pci_write_config32(dev, PCI_ME_H_GS,
|
|
ME_HSIO_MESSAGE | ME_HSIO_CMD_GETHSIOVER);
|
|
|
|
return 0;
|
|
}
|