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Message-Id: <20220215080438.264876-1-tomas.winkler@intel.com>
Date: Tue, 15 Feb 2022 10:04:35 +0200
From: Tomas Winkler <tomas.winkler@...el.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Alexander Usyskin <alexander.usyskin@...el.com>,
Vitaly Lubart <vitaly.lubart@...el.com>,
linux-kernel@...r.kernel.org, stable@...r.kernel.org,
Tomas Winkler <tomas.winkler@...el.com>
Subject: [char-misc 1/4] mei: me: disable driver on the ign firmware
From: Alexander Usyskin <alexander.usyskin@...el.com>
Add a quirk to disable MEI interface on Intel PCH Ignition (IGN)
as the IGN firmware doesn't support the protocol.
Cc: <stable@...r.kernel.org>
Signed-off-by: Alexander Usyskin <alexander.usyskin@...el.com>
Signed-off-by: Tomas Winkler <tomas.winkler@...el.com>
---
drivers/misc/mei/hw-me-regs.h | 1 +
drivers/misc/mei/hw-me.c | 23 ++++++++++++-----------
2 files changed, 13 insertions(+), 11 deletions(-)
diff --git a/drivers/misc/mei/hw-me-regs.h b/drivers/misc/mei/hw-me-regs.h
index 67bb6a25fd0a..888c27bc3f1a 100644
--- a/drivers/misc/mei/hw-me-regs.h
+++ b/drivers/misc/mei/hw-me-regs.h
@@ -120,6 +120,7 @@
#define PCI_CFG_HFS_2 0x48
#define PCI_CFG_HFS_3 0x60
# define PCI_CFG_HFS_3_FW_SKU_MSK 0x00000070
+# define PCI_CFG_HFS_3_FW_SKU_IGN 0x00000000
# define PCI_CFG_HFS_3_FW_SKU_SPS 0x00000060
#define PCI_CFG_HFS_4 0x64
#define PCI_CFG_HFS_5 0x68
diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c
index d3a6c0728645..fbc4c9581864 100644
--- a/drivers/misc/mei/hw-me.c
+++ b/drivers/misc/mei/hw-me.c
@@ -1405,16 +1405,16 @@ static bool mei_me_fw_type_sps_4(const struct pci_dev *pdev)
.quirk_probe = mei_me_fw_type_sps_4
/**
- * mei_me_fw_type_sps() - check for sps sku
+ * mei_me_fw_type_sps_ign() - check for sps or ign sku
*
- * Read ME FW Status register to check for SPS Firmware.
- * The SPS FW is only signaled in pci function 0
+ * Read ME FW Status register to check for SPS or IGN Firmware.
+ * The SPS/IGN FW is only signaled in pci function 0
*
* @pdev: pci device
*
- * Return: true in case of SPS firmware
+ * Return: true in case of SPS/IGN firmware
*/
-static bool mei_me_fw_type_sps(const struct pci_dev *pdev)
+static bool mei_me_fw_type_sps_ign(const struct pci_dev *pdev)
{
u32 reg;
u32 fw_type;
@@ -1427,14 +1427,15 @@ static bool mei_me_fw_type_sps(const struct pci_dev *pdev)
dev_dbg(&pdev->dev, "fw type is %d\n", fw_type);
- return fw_type == PCI_CFG_HFS_3_FW_SKU_SPS;
+ return fw_type == PCI_CFG_HFS_3_FW_SKU_IGN ||
+ fw_type == PCI_CFG_HFS_3_FW_SKU_SPS;
}
#define MEI_CFG_KIND_ITOUCH \
.kind = "itouch"
-#define MEI_CFG_FW_SPS \
- .quirk_probe = mei_me_fw_type_sps
+#define MEI_CFG_FW_SPS_IGN \
+ .quirk_probe = mei_me_fw_type_sps_ign
#define MEI_CFG_FW_VER_SUPP \
.fw_ver_supported = 1
@@ -1535,7 +1536,7 @@ static const struct mei_cfg mei_me_pch12_sps_cfg = {
MEI_CFG_PCH8_HFS,
MEI_CFG_FW_VER_SUPP,
MEI_CFG_DMA_128,
- MEI_CFG_FW_SPS,
+ MEI_CFG_FW_SPS_IGN,
};
/* Cannon Lake itouch with quirk for SPS 5.0 and newer Firmware exclusion
@@ -1545,7 +1546,7 @@ static const struct mei_cfg mei_me_pch12_itouch_sps_cfg = {
MEI_CFG_KIND_ITOUCH,
MEI_CFG_PCH8_HFS,
MEI_CFG_FW_VER_SUPP,
- MEI_CFG_FW_SPS,
+ MEI_CFG_FW_SPS_IGN,
};
/* Tiger Lake and newer devices */
@@ -1562,7 +1563,7 @@ static const struct mei_cfg mei_me_pch15_sps_cfg = {
MEI_CFG_FW_VER_SUPP,
MEI_CFG_DMA_128,
MEI_CFG_TRC,
- MEI_CFG_FW_SPS,
+ MEI_CFG_FW_SPS_IGN,
};
/*
--
2.34.1
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