1 files changed, 107 insertions, 0 deletions

diff --git a/arch/arm/mach-ux500/id.c b/arch/arm/mach-ux500/id.c
new file mode 100644
index 000000000000..d35122ebc67b
--- /dev/null
+++ b/arch/arm/mach-ux500/id.c
@@ -0,0 +1,107 @@
+/*
+ * Copyright (C) ST-Ericsson SA 2010
+ *
+ * Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson
+ * License terms: GNU General Public License (GPL) version 2
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/io.h>
+
+#include <asm/cputype.h>
+#include <asm/tlbflush.h>
+#include <asm/cacheflush.h>
+#include <asm/mach/map.h>
+
+#include <mach/hardware.h>
+#include <mach/setup.h>
+
+struct dbx500_asic_id dbx500_id;
+
+static unsigned int ux500_read_asicid(phys_addr_t addr)
+{
+        phys_addr_t base = addr & ~0xfff;
+        struct map_desc desc = {
+                .virtual        = IO_ADDRESS(base),
+                .pfn            = __phys_to_pfn(base),
+                .length         = SZ_16K,
+                .type           = MT_DEVICE,
+        };
+
+        iotable_init(&desc, 1);
+
+        /* As in devicemaps_init() */
+        local_flush_tlb_all();
+        flush_cache_all();
+
+        return readl(__io_address(addr));
+}
+
+static void ux500_print_soc_info(unsigned int asicid)
+{
+        unsigned int rev = dbx500_revision();
+
+        pr_info("DB%4x ", dbx500_partnumber());
+
+        if (rev == 0x01)
+                pr_cont("Early Drop");
+        else if (rev >= 0xA0)
+                pr_cont("v%d.%d" , (rev >> 4) - 0xA + 1, rev & 0xf);
+        else
+                pr_cont("Unknown");
+
+        pr_cont(" [%#010x]\n", asicid);
+}
+
+static unsigned int partnumber(unsigned int asicid)
+{
+        return (asicid >> 8) & 0xffff;
+}
+
+/*
+ * SOC          MIDR            ASICID ADDRESS          ASICID VALUE
+ * DB8500ed     0x410fc090      0x9001FFF4              0x00850001
+ * DB8500v1     0x411fc091      0x9001FFF4              0x008500A0
+ * DB8500v1.1   0x411fc091      0x9001FFF4              0x008500A1
+ * DB8500v2     0x412fc091      0x9001DBF4              0x008500B0
+ * DB5500v1     0x412fc091      0x9001FFF4              0x005500A0
+ */
+
+void __init ux500_map_io(void)
+{
+        unsigned int cpuid = read_cpuid_id();
+        unsigned int asicid = 0;
+        phys_addr_t addr = 0;
+
+        switch (cpuid) {
+        case 0x410fc090: /* DB8500ed */
+        case 0x411fc091: /* DB8500v1 */
+                addr = 0x9001FFF4;
+                break;
+
+        case 0x412fc091: /* DB8500v2 / DB5500v1 */
+                asicid = ux500_read_asicid(0x9001DBF4);
+                if (partnumber(asicid) == 0x8500)
+                        /* DB8500v2 */
+                        break;
+
+                /* DB5500v1 */
+                addr = 0x9001FFF4;
+                break;
+        }
+
+        if (addr)
+                asicid = ux500_read_asicid(addr);
+
+        if (!asicid) {
+                pr_err("Unable to identify SoC\n");
+                ux500_unknown_soc();
+        }
+
+        dbx500_id.process = asicid >> 24;
+        dbx500_id.partnumber = partnumber(asicid);
+        dbx500_id.revision = asicid & 0xff;
+
+        ux500_print_soc_info(asicid);
+}