diff options
| author | Alexander Usyskin <alexander.usyskin@intel.com> | 2015-08-02 22:20:51 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-08-04 03:33:54 +0300 |
| commit | bb9f4d26dda7d2a875cadc0f7eedee3d65d3d1f5 (patch) | |
| tree | ae3cec0e9b0011eeb724bd87bc289ffc09d8f3ea | |
| parent | 11830486c5717c713bb363b14944cda39e3034f9 (diff) | |
| download | linux-bb9f4d26dda7d2a875cadc0f7eedee3d65d3d1f5.tar.xz | |
mei: me: d0i3: add flag to indicate D0i3 support
Detect d0i3 low power state during hw configuration,
the value is set in HFS_1 pci config reigister.
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>
| -rw-r--r-- | drivers/misc/mei/hw-me-regs.h | 1 | ||||
| -rw-r--r-- | drivers/misc/mei/hw-me.c | 10 | ||||
| -rw-r--r-- | drivers/misc/mei/hw-me.h | 6 |
3 files changed, 14 insertions, 3 deletions
diff --git a/drivers/misc/mei/hw-me-regs.h b/drivers/misc/mei/hw-me-regs.h index 6cfb198d5daf..4c8f05ea3651 100644 --- a/drivers/misc/mei/hw-me-regs.h +++ b/drivers/misc/mei/hw-me-regs.h @@ -123,6 +123,7 @@ /* Host Firmware Status Registers in PCI Config Space */ #define PCI_CFG_HFS_1 0x40 +# define PCI_CFG_HFS_1_D0I3_MSK 0x80000000 #define PCI_CFG_HFS_2 0x48 #define PCI_CFG_HFS_3 0x60 #define PCI_CFG_HFS_4 0x64 diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c index 43d7101ff993..17d6894b0fd2 100644 --- a/drivers/misc/mei/hw-me.c +++ b/drivers/misc/mei/hw-me.c @@ -176,12 +176,20 @@ static int mei_me_fw_status(struct mei_device *dev, */ static void mei_me_hw_config(struct mei_device *dev) { + struct pci_dev *pdev = to_pci_dev(dev->dev); struct mei_me_hw *hw = to_me_hw(dev); - u32 hcsr = mei_hcsr_read(dev); + u32 hcsr, reg; + /* Doesn't change in runtime */ + hcsr = mei_hcsr_read(dev); dev->hbuf_depth = (hcsr & H_CBD) >> 24; hw->pg_state = MEI_PG_OFF; + + reg = 0; + pci_read_config_dword(pdev, PCI_CFG_HFS_1, ®); + hw->d0i3_supported = + ((reg & PCI_CFG_HFS_1_D0I3_MSK) == PCI_CFG_HFS_1_D0I3_MSK); } /** diff --git a/drivers/misc/mei/hw-me.h b/drivers/misc/mei/hw-me.h index 6022d52af6f6..cf64847a35b9 100644 --- a/drivers/misc/mei/hw-me.h +++ b/drivers/misc/mei/hw-me.h @@ -50,13 +50,15 @@ struct mei_cfg { * struct mei_me_hw - me hw specific data * * @cfg: per device generation config and ops - * @mem_addr: io memory address - * @pg_state: power gating state + * @mem_addr: io memory address + * @pg_state: power gating state + * @d0i3_supported: di03 support */ struct mei_me_hw { const struct mei_cfg *cfg; void __iomem *mem_addr; enum mei_pg_state pg_state; + bool d0i3_supported; }; #define to_me_hw(dev) (struct mei_me_hw *)((dev)->hw) |