diff options
Diffstat (limited to 'src/soc/intel/broadwell/me_status.c')
| -rw-r--r-- | src/soc/intel/broadwell/me_status.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/src/soc/intel/broadwell/me_status.c b/src/soc/intel/broadwell/me_status.c index 3738fd4c8b..4dfbeaec75 100644 --- a/src/soc/intel/broadwell/me_status.c +++ b/src/soc/intel/broadwell/me_status.c @@ -25,6 +25,7 @@ #include <string.h> #include <broadwell/pci_devs.h> #include <broadwell/me.h> +#include <delay.h> #if (CONFIG_DEFAULT_CONSOLE_LOGLEVEL >= BIOS_DEBUG) @@ -279,3 +280,38 @@ void intel_me_status(void) printk(BIOS_DEBUG, "\n"); } #endif + +void intel_me_hsio_version(uint16_t *version, uint16_t *checksum) +{ + int count; + u32 hsiover; + struct me_hfs hfs; + + /* Query for HSIO version, overloads H_GS and HFS */ + pci_write_config32(PCH_DEV_ME, 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(&hfs, PCI_ME_HFS); + if (hfs.bios_msg_ack) + break; + udelay(ME_DELAY); + } + if (!count) { + printk(BIOS_ERR, "ERROR: ME failed to respond\n"); + return; + } + + /* HSIO version should be in HFS_5 */ + hsiover = pci_read_config32(PCH_DEV_ME, PCI_ME_HFS5); + *version = hsiover >> 16; + *checksum = hsiover & 0xffff; + + printk(BIOS_DEBUG, "ME: HSIO Version : %d (CRC 0x%04x)\n", + *version, *checksum); + + /* Reset registers to normal behavior */ + pci_write_config32(PCH_DEV_ME, PCI_ME_H_GS, + ME_HSIO_MESSAGE | ME_HSIO_CMD_GETHSIOVER); +} |