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| author |   Tomas Winkler <tomas.winkler@intel.com> | 2020-06-19 19:51:17 +0300 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-06-29 18:40:26 +0200 |
| commit | 4d3c6c8eb9816a0a0cb80becd159cf81a9977ed7 (patch) | |
| tree | 3601024f7561aea99b3229b8a7b108226928cc98 /drivers/misc/mei/hw-me.c | |
| parent | mei: me: constify the device parameter to the probe quirk (diff) | |
| download | linux-dev-4d3c6c8eb9816a0a0cb80becd159cf81a9977ed7.tar.xz linux-dev-4d3c6c8eb9816a0a0cb80becd159cf81a9977ed7.zip | |
mei: me: make mei_me_fw_sku_sps_4() less cryptic
Last add mei_me_fw_sku_sps_4() kdoc and add descriptive defines
for register name and values.
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Link: https://lore.kernel.org/r/20200619165121.2145330-3-tomas.winkler@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc/mei/hw-me.c')
| -rw-r--r-- | drivers/misc/mei/hw-me.c | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c index f977a150a685..5ca9c678d3a8 100644 --- a/drivers/misc/mei/hw-me.c +++ b/drivers/misc/mei/hw-me.c @@ -1366,20 +1366,26 @@ static bool mei_me_fw_type_nm(const struct pci_dev *pdev) #define MEI_CFG_FW_NM \ .quirk_probe = mei_me_fw_type_nm +/** + * mei_me_fw_sku_sps_4() - check for sps 4.0 sku + * + * Read ME FW Status register to check for SPS Firmware. + * The SPS FW is only signaled in the PCI function 0. + * __Note__: Deprecated by SPS 5.0 and newer. + * + * @pdev: pci device + * + * Return: true in case of SPS firmware + */ static bool mei_me_fw_type_sps_4(const struct pci_dev *pdev) { u32 reg; unsigned int devfn; - /* - * Read ME FW Status register to check for SPS Firmware - * The SPS FW is only signaled in pci function 0 - */ devfn = PCI_DEVFN(PCI_SLOT(pdev->devfn), 0); pci_bus_read_config_dword(pdev->bus, devfn, PCI_CFG_HFS_1, ®); trace_mei_pci_cfg_read(&pdev->dev, "PCI_CFG_HFS_1", PCI_CFG_HFS_1, reg); - /* if bits [19:16] = 15, running SPS Firmware */ - return (reg & 0xf0000) == 0xf0000; + return (reg & PCI_CFG_HFS_1_OPMODE_MSK) == PCI_CFG_HFS_1_OPMODE_SPS; } #define MEI_CFG_FW_SPS_4 \ |