samsung-laptop: dump model and version informations

We still need to figure out exactly what each of different fields
represent, but they contain at least model and version informations.

Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Matthew Garrett <mjg@redhat.com>

1 files changed, 42 insertions, 0 deletions

diff --git a/drivers/platform/x86/samsung-laptop.c b/drivers/platform/x86/samsung-laptop.c
index 431f7dc2f222..b41c7b4f9c71 100644
--- a/drivers/platform/x86/samsung-laptop.c
+++ b/drivers/platform/x86/samsung-laptop.c
@@ -303,6 +303,7 @@ struct samsung_laptop_debug {
 
         struct debugfs_blob_wrapper f0000_wrapper;
         struct debugfs_blob_wrapper data_wrapper;
+        struct debugfs_blob_wrapper sdiag_wrapper;
 };
 
 struct samsung_laptop;
@@ -337,6 +338,8 @@ struct samsung_laptop {
 
         bool handle_backlight;
         bool has_stepping_quirk;
+
+        char sdiag[64];
 };
 
 
@@ -1164,6 +1167,9 @@ static int samsung_debugfs_init(struct samsung_laptop *samsung)
         samsung->debug.data_wrapper.data = &samsung->debug.data;
         samsung->debug.data_wrapper.size = sizeof(samsung->debug.data);
 
+        samsung->debug.sdiag_wrapper.data = samsung->sdiag;
+        samsung->debug.sdiag_wrapper.size = strlen(samsung->sdiag);
+
         dent = debugfs_create_u16("command", S_IRUGO | S_IWUSR,
                                   samsung->debug.root, &samsung->debug.command);
         if (!dent)
@@ -1207,6 +1213,12 @@ static int samsung_debugfs_init(struct samsung_laptop *samsung)
         if (!dent)
                 goto error_debugfs;
 
+        dent = debugfs_create_blob("sdiag", S_IRUGO | S_IWUSR,
+                                   samsung->debug.root,
+                                   &samsung->debug.sdiag_wrapper);
+        if (!dent)
+                goto error_debugfs;
+
         return 0;
 
 error_debugfs:
@@ -1259,6 +1271,34 @@ static __init void samsung_sabi_infos(struct samsung_laptop *samsung, int loca,
         printk(KERN_DEBUG " SABI pointer = 0x%08x\n", ifaceP);
 }
 
+static void __init samsung_sabi_diag(struct samsung_laptop *samsung)
+{
+        int loca = find_signature(samsung->f0000_segment, "SDiaG@");
+        int i;
+
+        if (loca == 0xffff)
+                return ;
+
+        /* Example:
+         * Ident: @SDiaG@686XX-N90X3A/966-SEC-07HL-S90X3A
+         *
+         * Product name: 90X3A
+         * BIOS Version: 07HL
+         */
+        loca += 1;
+        for (i = 0; loca < 0xffff && i < sizeof(samsung->sdiag) - 1; loca++) {
+                char temp = readb(samsung->f0000_segment + loca);
+
+                if (isalnum(temp) || temp == '/' || temp == '-')
+                        samsung->sdiag[i++] = temp;
+                else
+                        break ;
+        }
+
+        if (debug && samsung->sdiag[0])
+                pr_info("sdiag: %s", samsung->sdiag);
+}
+
 static int __init samsung_sabi_init(struct samsung_laptop *samsung)
 {
         const struct sabi_config *config = NULL;
@@ -1276,6 +1316,8 @@ static int __init samsung_sabi_init(struct samsung_laptop *samsung)
                 goto exit;
         }
 
+        samsung_sabi_diag(samsung);
+
         /* Try to find one of the signatures in memory to find the header */
         for (i = 0; sabi_configs[i].test_string != 0; ++i) {
                 samsung->config = &sabi_configs[i];