diff options
| author |   Alexander Usyskin <alexander.usyskin@intel.com> | 2014-03-31 17:59:23 +0300 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-05-03 19:21:22 -0400 |
| commit | 04dd36619564c3fcf590c2bf2619b14c09cd0749 (patch) | |
| tree | 990d48b852f6eba87eb1450d509edcb80481f192 /drivers/misc/mei/hw-txe.c | |
| parent | mei: me: bump hbm version to 1.1 to support power gating (diff) | |
| download | linux-dev-04dd36619564c3fcf590c2bf2619b14c09cd0749.tar.xz linux-dev-04dd36619564c3fcf590c2bf2619b14c09cd0749.zip | |
mei: extract fw status registers
Fetch FW status registers, as they are important in
in understanding of FW reset reasons
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>
Diffstat (limited to 'drivers/misc/mei/hw-txe.c')
| -rw-r--r-- | drivers/misc/mei/hw-txe.c | 37 |
1 files changed, 36 insertions, 1 deletions
diff --git a/drivers/misc/mei/hw-txe.c b/drivers/misc/mei/hw-txe.c index 4a6f567f4f80..455a6a56b82b 100644 --- a/drivers/misc/mei/hw-txe.c +++ b/drivers/misc/mei/hw-txe.c @@ -620,7 +620,10 @@ static int mei_txe_write(struct mei_device *dev, mei_txe_input_ready_interrupt_enable(dev); if (!mei_txe_is_input_ready(dev)) { - dev_err(&dev->pdev->dev, "Input is not ready"); + struct mei_fw_status fw_status; + mei_fw_status(dev, &fw_status); + dev_err(&dev->pdev->dev, "Input is not ready " FW_STS_FMT "\n", + FW_STS_PRM(fw_status)); return -EAGAIN; } @@ -1039,8 +1042,40 @@ end: return IRQ_HANDLED; } + +/** + * mei_txe_fw_status - retrieve fw status from the pci config space + * + * @dev: the device structure + * @fw_status: fw status registers storage + * + * returns: 0 on success an error code otherwise + */ +static int mei_txe_fw_status(struct mei_device *dev, + struct mei_fw_status *fw_status) +{ + const u32 pci_cfg_reg[] = {PCI_CFG_TXE_FW_STS0, PCI_CFG_TXE_FW_STS1}; + int i; + + if (!fw_status) + return -EINVAL; + + fw_status->count = 2; + + for (i = 0; i < fw_status->count && i < MEI_FW_STATUS_MAX; i++) { + int ret; + ret = pci_read_config_dword(dev->pdev, + pci_cfg_reg[i], &fw_status->status[i]); + if (ret) + return ret; + } + + return 0; +} + static const struct mei_hw_ops mei_txe_hw_ops = { + .fw_status = mei_txe_fw_status, .host_is_ready = mei_txe_host_is_ready, .pg_state = mei_txe_pg_state, |