X-Git-Url: http://git.samba.org/samba.git/?p=sfrench%2Fcifs-2.6.git;a=blobdiff_plain;f=drivers%2Fsoc%2Ftegra%2Ffuse%2Ftegra-apbmisc.c;fp=drivers%2Fsoc%2Ftegra%2Ffuse%2Ftegra-apbmisc.c;h=bfc1d54ac4adc349465428c22faeddba4aa0f0aa;hp=0000000000000000000000000000000000000000;hb=783c8f4c84451bc444e314a71b447239c6ef6fd9;hpb=35874f3617b38e0c1f72163407c41d554a8f5939
diff --git a/drivers/soc/tegra/fuse/tegra-apbmisc.c b/drivers/soc/tegra/fuse/tegra-apbmisc.c
new file mode 100644
index 000000000000..bfc1d54ac4ad
--- /dev/null
+++ b/drivers/soc/tegra/fuse/tegra-apbmisc.c
@@ -0,0 +1,112 @@
+/*
+ * Copyright (c) 2014, NVIDIA CORPORATION. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see .
+ *
+ */
+
+#include
+#include
+#include
+#include
+
+#include
+
+#include "fuse.h"
+
+#define APBMISC_BASE 0x70000800
+#define APBMISC_SIZE 0x64
+#define FUSE_SKU_INFO 0x10
+
+static void __iomem *apbmisc_base;
+static void __iomem *strapping_base;
+
+u32 tegra_read_chipid(void)
+{
+ return readl_relaxed(apbmisc_base + 4);
+}
+
+u8 tegra_get_chip_id(void)
+{
+ u32 id = tegra_read_chipid();
+
+ return (id >> 8) & 0xff;
+}
+
+u32 tegra_read_straps(void)
+{
+ if (strapping_base)
+ return readl_relaxed(strapping_base);
+ else
+ return 0;
+}
+
+static const struct of_device_id apbmisc_match[] __initconst = {
+ { .compatible = "nvidia,tegra20-apbmisc", },
+ {},
+};
+
+void __init tegra_init_revision(void)
+{
+ u32 id, chip_id, minor_rev;
+ int rev;
+
+ id = tegra_read_chipid();
+ chip_id = (id >> 8) & 0xff;
+ minor_rev = (id >> 16) & 0xf;
+
+ switch (minor_rev) {
+ case 1:
+ rev = TEGRA_REVISION_A01;
+ break;
+ case 2:
+ rev = TEGRA_REVISION_A02;
+ break;
+ case 3:
+ if (chip_id == TEGRA20 && (tegra20_spare_fuse_early(18) ||
+ tegra20_spare_fuse_early(19)))
+ rev = TEGRA_REVISION_A03p;
+ else
+ rev = TEGRA_REVISION_A03;
+ break;
+ case 4:
+ rev = TEGRA_REVISION_A04;
+ break;
+ default:
+ rev = TEGRA_REVISION_UNKNOWN;
+ }
+
+ tegra_sku_info.revision = rev;
+
+ if (chip_id == TEGRA20)
+ tegra_sku_info.sku_id = tegra20_fuse_early(FUSE_SKU_INFO);
+ else
+ tegra_sku_info.sku_id = tegra30_fuse_readl(FUSE_SKU_INFO);
+}
+
+void __init tegra_init_apbmisc(void)
+{
+ struct device_node *np;
+
+ np = of_find_matching_node(NULL, apbmisc_match);
+ apbmisc_base = of_iomap(np, 0);
+ if (!apbmisc_base) {
+ pr_warn("ioremap tegra apbmisc failed. using %08x instead\n",
+ APBMISC_BASE);
+ apbmisc_base = ioremap(APBMISC_BASE, APBMISC_SIZE);
+ }
+
+ strapping_base = of_iomap(np, 1);
+ if (!strapping_base)
+ pr_err("ioremap tegra strapping_base failed\n");
+}