xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

mei: read and print all six FW status registers

Browse Source 
ME devices prior to PCH8 (Lynx Point) have two FW status registers,
on PCH8 and newer excluding txe there are six FW status registers.

Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alexander Usyskin
2014-11-19 17:01:38 +02:00
committed by Greg Kroah-Hartman
parent e88281edd4
commit edca5ea3ff
7 changed files with 100 additions and 29 deletions
Download Patch File Download Diff File Expand all files Collapse all files

38
drivers/misc/mei/init.c
View File

@@ -54,6 +54,35 @@ const char *mei_pg_state_str(enum mei_pg_state state)
#undef MEI_PG_STATE
}
/**
* mei_fw_status2str - convert fw status registers to printable string
*
* @fw_status: firmware status
* @buf: string buffer at minimal size MEI_FW_STATUS_STR_SZ
* @len: buffer len must be >= MEI_FW_STATUS_STR_SZ
*
* Return: number of bytes written or -EINVAL if buffer is to small
*/
ssize_t mei_fw_status2str(struct mei_fw_status *fw_status,
char *buf, size_t len)
{
ssize_t cnt = 0;
int i;
buf[0] = '\0';
if (len < MEI_FW_STATUS_STR_SZ)
return -EINVAL;
for (i = 0; i < fw_status->count; i++)
cnt += scnprintf(buf + cnt, len - cnt, "%08X ",
fw_status->status[i]);
/* drop last space */
buf[cnt] = '\0';
return cnt;
}
EXPORT_SYMBOL_GPL(mei_fw_status2str);
/**
* mei_cancel_work - Cancel mei background jobs
@@ -86,12 +115,11 @@ int mei_reset(struct mei_device *dev)
state != MEI_DEV_DISABLED &&
state != MEI_DEV_POWER_DOWN &&
state != MEI_DEV_POWER_UP) {
struct mei_fw_status fw_status;
char fw_sts_str[MEI_FW_STATUS_STR_SZ];
mei_fw_status(dev, &fw_status);
dev_warn(dev->dev,
"unexpected reset: dev_state = %s " FW_STS_FMT "\n",
mei_dev_state_str(state), FW_STS_PRM(fw_status));
mei_fw_status_str(dev, fw_sts_str, MEI_FW_STATUS_STR_SZ);
dev_warn(dev->dev, "unexpected reset: dev_state = %s fw status = %s\n",
mei_dev_state_str(state), fw_sts_str);
}
/* we're already in reset, cancel the init timer