i7300_edac: Detect if the device is on single mode

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 17 insertions, 8 deletions

diff --git a/drivers/edac/i7300_edac.c b/drivers/edac/i7300_edac.c
index 27088af79672..a88742abf1f4 100644
--- a/drivers/edac/i7300_edac.c
+++ b/drivers/edac/i7300_edac.c
@@ -92,12 +92,13 @@
 
         /* OFFSETS for Function 1 */
 #define MC_SETTINGS             0x40
+  #define IS_MIRRORED(mc)               ((mc) & (1 << 16))
+  #define IS_ECC_ENABLED(mc)            ((mc) & (1 << 5))
+  #define IS_RETRY_ENABLED(mc)          ((mc) & (1 << 31))
+  #define IS_SCRBALGO_ENHANCED(mc)      ((mc) & (1 << 8))
 
-#define IS_MIRRORED(mc)                 ((mc) & (1 << 16))
-#define IS_ECC_ENABLED(mc)              ((mc) & (1 << 5))
-#define IS_RETRY_ENABLED(mc)            ((mc) & (1 << 31))
-#define IS_SCRBALGO_ENHANCED(mc)        ((mc) & (1 << 8))
-
+#define MC_SETTINGS_A           0x58
+  #define IS_SINGLE_MODE(mca)           ((mca) & (1 << 14))
 
 #define TOLM                    0x6C
 #define REDMEMB                 0x7C
@@ -237,9 +238,11 @@ struct i7300_pvt {
 
         u16 tolm;                               /* top of low memory */
         u64 ambase;                             /* AMB BAR */
-        u32 mc_settings;
 
-        u16 mir[MAX_MIR];
+        u32 mc_settings;                        /* Report several settings */
+        u32 mc_settings_a;
+
+        u16 mir[MAX_MIR];                       /* Memory Interleave Reg*/
 
         u16 mtr[MAX_SLOTS][MAX_BRANCHES];               /* Memory Technlogy Reg */
         u16 ambpresent[MAX_CHANNELS];           /* AMB present regs */
@@ -653,9 +656,15 @@ static int i7300_get_mc_regs(struct mem_ctl_info *mci)
         /* Get memory controller settings */
         pci_read_config_dword(pvt->pci_dev_16_1_fsb_addr_map, MC_SETTINGS,
                              &pvt->mc_settings);
+        pci_read_config_dword(pvt->pci_dev_16_1_fsb_addr_map, MC_SETTINGS_A,
+                             &pvt->mc_settings_a);
 
-        debugf0("Memory controller operating on %s mode\n",
+        if (IS_SINGLE_MODE(pvt->mc_settings_a))
+                debugf0("Memory controller operating on single mode\n");
+        else
+                debugf0("Memory controller operating on %s mode\n",
                 IS_MIRRORED(pvt->mc_settings) ? "mirrored" : "non-mirrored");
+
         debugf0("Error detection is %s\n",
                 IS_ECC_ENABLED(pvt->mc_settings) ? "enabled" : "disabled");
         debugf0("Retry is %s\n",