Add Tegra2 SPI controller.

processor_enable.c

 /*
  * This file is part of the flashrom project.
  *
  * Copyright (C) 2010 Carl-Daniel Hailfinger
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation; version 2 of the License.
  *
  * This program is distributed in the hope that it will be useful,
@@ skipping 63 matching lines @@
                 return (strncmp(ptr, "ICT Loongson-2 V0.3",
                                 sizeof("ICT Loongson-2 V0.3") - 1) == 0)
                     || (strncmp(ptr, "Godson2 V0.3  FPU V0.1",
                                 sizeof("Godson2 V0.3  FPU V0.1") - 1) == 0);
         }
         fclose(cpuinfo);
         return 0;
 }
 #endif
 
+#if defined(__arm__)
+#include <stdio.h>
+#include <string.h>
+#include <ctype.h>
+
+/* Returns true if the /proc/cpuinfo contains a line: "CPU part *: *0xc09".
+ * TODO: need to extend in future for same SPI controller in chip family.
+ */
+static int is_tegra2(void)
+{
+        FILE *cpuinfo;
+        uint32_t impl = 0, architecture = 0, variant = 0, part = 0;
+        const char *name = "CPU part";
+        const char *value = "0xc09";
+        int ret = 0;
+
+        cpuinfo = fopen("/proc/cpuinfo", "rb");
+        if (!cpuinfo)
+                return 0;
+        while (!feof(cpuinfo)) {
+                char line[512], *ptr;
+                if (fgets(line, sizeof(line), cpuinfo) == NULL)
+                        break;
+                ptr = line;
+                while (*ptr && isspace((unsigned char)*ptr))
+                        ptr++;
+                if (strncmp(ptr, name, strlen(name)) == 0)
+                        ptr += strlen(name);
+                while (*ptr && isspace((unsigned char)*ptr))
+                        ptr++;
+                if (*ptr != ':')
+                        continue;
+                ptr++;
+                while (*ptr && isspace((unsigned char)*ptr))
+                        ptr++;
+                ret = (strncmp(ptr, value, strlen(value)) == 0);
+        }
+        fclose(cpuinfo);
+        return ret;
+}
+#endif
+
 int processor_flash_enable(void)
 {
         /* FIXME: detect loongson on FreeBSD and OpenBSD as well.  */
 #if defined (__MIPSEL__) && defined (__linux)
         if (is_loongson()) {
                 flashbase = 0x1fc00000;
                 return 0;
         }
 #endif
+#if defined (__arm__)
+        if (is_tegra2()) {
+                msg_pdbg("Detected NVIDIA Tegra 2.\n");
+                return tegra2_spi_init();
+        }
+#endif
         /* Not implemented yet. Oh well. */
         return 1;
 }
 
 #endif