[PATCH 05/12] soc/tegra: Add efuse driver for Tegra
Thierry Reding
thierry.reding at gmail.com
Fri Jul 11 05:16:04 PDT 2014
From: Peter De Schrijver <pdeschrijver at nvidia.com>
Implement fuse driver for Tegra20, Tegra30, Tegra114 and Tegra124. This
replaces functionality previously provided in arch/arm/mach-tegra, which
is removed in this patch.
While at it, move the only user of the global tegra_revision variable
over to tegra_sku_info.revision and export tegra_fuse_readl() to allow
drivers to read calibration fuses.
Signed-off-by: Peter De Schrijver <pdeschrijver at nvidia.com>
Signed-off-by: Stephen Warren <swarren at nvidia.com>
Signed-off-by: Thierry Reding <treding at nvidia.com>
---
Documentation/ABI/testing/sysfs-driver-tegra-fuse | 11 +
arch/arm/mach-tegra/Makefile | 4 -
arch/arm/mach-tegra/fuse.c | 259 ---------------------
arch/arm/mach-tegra/fuse.h | 60 -----
arch/arm/mach-tegra/reset.c | 1 -
arch/arm/mach-tegra/tegra.c | 3 +-
drivers/misc/fuse/Makefile | 1 +
drivers/soc/Makefile | 1 +
drivers/soc/tegra/Makefile | 1 +
drivers/soc/tegra/fuse/Makefile | 8 +
drivers/soc/tegra/fuse/fuse-tegra.c | 155 ++++++++++++
drivers/soc/tegra/fuse/fuse-tegra20.c | 141 +++++++++++
drivers/soc/tegra/fuse/fuse-tegra30.c | 223 ++++++++++++++++++
drivers/soc/tegra/fuse/fuse.h | 71 ++++++
.../soc/tegra/fuse/speedo-tegra114.c | 54 +++--
drivers/soc/tegra/fuse/speedo-tegra124.c | 167 +++++++++++++
.../soc/tegra/fuse/speedo-tegra20.c | 43 ++--
.../soc/tegra/fuse/speedo-tegra30.c | 174 +++++++-------
drivers/soc/tegra/fuse/tegra-apbmisc.c | 111 +++++++++
include/linux/tegra-soc.h | 20 +-
20 files changed, 1045 insertions(+), 463 deletions(-)
create mode 100644 Documentation/ABI/testing/sysfs-driver-tegra-fuse
delete mode 100644 arch/arm/mach-tegra/fuse.c
delete mode 100644 arch/arm/mach-tegra/fuse.h
create mode 100644 drivers/misc/fuse/Makefile
create mode 100644 drivers/soc/tegra/Makefile
create mode 100644 drivers/soc/tegra/fuse/Makefile
create mode 100644 drivers/soc/tegra/fuse/fuse-tegra.c
create mode 100644 drivers/soc/tegra/fuse/fuse-tegra20.c
create mode 100644 drivers/soc/tegra/fuse/fuse-tegra30.c
create mode 100644 drivers/soc/tegra/fuse/fuse.h
rename arch/arm/mach-tegra/tegra114_speedo.c => drivers/soc/tegra/fuse/speedo-tegra114.c (56%)
create mode 100644 drivers/soc/tegra/fuse/speedo-tegra124.c
rename arch/arm/mach-tegra/tegra20_speedo.c => drivers/soc/tegra/fuse/speedo-tegra20.c (68%)
rename arch/arm/mach-tegra/tegra30_speedo.c => drivers/soc/tegra/fuse/speedo-tegra30.c (53%)
create mode 100644 drivers/soc/tegra/fuse/tegra-apbmisc.c
diff --git a/Documentation/ABI/testing/sysfs-driver-tegra-fuse b/Documentation/ABI/testing/sysfs-driver-tegra-fuse
new file mode 100644
index 000000000000..69f5af632657
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-driver-tegra-fuse
@@ -0,0 +1,11 @@
+What: /sys/devices/*/<our-device>/fuse
+Date: February 2014
+Contact: Peter De Schrijver <pdeschrijver at nvidia.com>
+Description: read-only access to the efuses on Tegra20, Tegra30, Tegra114
+ and Tegra124 SoC's from NVIDIA. The efuses contain write once
+ data programmed at the factory. The data is layed out in 32bit
+ words in LSB first format. Each bit represents a single value
+ as decoded from the fuse registers. Bits order/assignment
+ exactly matches the HW registers, including any unused bits.
+Users: any user space application which wants to read the efuses on
+ Tegra SoC's
diff --git a/arch/arm/mach-tegra/Makefile b/arch/arm/mach-tegra/Makefile
index 6fbfbb77dcd9..e8601bb56f98 100644
--- a/arch/arm/mach-tegra/Makefile
+++ b/arch/arm/mach-tegra/Makefile
@@ -2,7 +2,6 @@ asflags-y += -march=armv7-a
obj-y += io.o
obj-y += irq.o
-obj-y += fuse.o
obj-y += pmc.o
obj-y += flowctrl.o
obj-y += powergate.o
@@ -13,13 +12,11 @@ obj-y += reset-handler.o
obj-y += sleep.o
obj-y += tegra.o
obj-$(CONFIG_CPU_IDLE) += cpuidle.o
-obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += tegra20_speedo.o
obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += sleep-tegra20.o
obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += pm-tegra20.o
ifeq ($(CONFIG_CPU_IDLE),y)
obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += cpuidle-tegra20.o
endif
-obj-$(CONFIG_ARCH_TEGRA_3x_SOC) += tegra30_speedo.o
obj-$(CONFIG_ARCH_TEGRA_3x_SOC) += sleep-tegra30.o
obj-$(CONFIG_ARCH_TEGRA_3x_SOC) += pm-tegra30.o
ifeq ($(CONFIG_CPU_IDLE),y)
@@ -28,7 +25,6 @@ endif
obj-$(CONFIG_SMP) += platsmp.o headsmp.o
obj-$(CONFIG_HOTPLUG_CPU) += hotplug.o
-obj-$(CONFIG_ARCH_TEGRA_114_SOC) += tegra114_speedo.o
obj-$(CONFIG_ARCH_TEGRA_114_SOC) += sleep-tegra30.o
obj-$(CONFIG_ARCH_TEGRA_114_SOC) += pm-tegra30.o
ifeq ($(CONFIG_CPU_IDLE),y)
diff --git a/arch/arm/mach-tegra/fuse.c b/arch/arm/mach-tegra/fuse.c
deleted file mode 100644
index e9b01a5cf40e..000000000000
--- a/arch/arm/mach-tegra/fuse.c
+++ /dev/null
@@ -1,259 +0,0 @@
-/*
- * arch/arm/mach-tegra/fuse.c
- *
- * Copyright (C) 2010 Google, Inc.
- * Copyright (c) 2013, NVIDIA CORPORATION. All rights reserved.
- *
- * Author:
- * Colin Cross <ccross at android.com>
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that 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.
- *
- */
-
-#include <linux/clk.h>
-#include <linux/export.h>
-#include <linux/io.h>
-#include <linux/kernel.h>
-#include <linux/random.h>
-#include <linux/tegra-soc.h>
-
-#include "apbio.h"
-#include "fuse.h"
-#include "iomap.h"
-
-/* Tegra20 only */
-#define FUSE_UID_LOW 0x108
-#define FUSE_UID_HIGH 0x10c
-
-/* Tegra30 and later */
-#define FUSE_VENDOR_CODE 0x200
-#define FUSE_FAB_CODE 0x204
-#define FUSE_LOT_CODE_0 0x208
-#define FUSE_LOT_CODE_1 0x20c
-#define FUSE_WAFER_ID 0x210
-#define FUSE_X_COORDINATE 0x214
-#define FUSE_Y_COORDINATE 0x218
-
-#define FUSE_SKU_INFO 0x110
-
-#define TEGRA20_FUSE_SPARE_BIT 0x200
-#define TEGRA30_FUSE_SPARE_BIT 0x244
-
-int tegra_sku_id;
-int tegra_cpu_process_id;
-int tegra_core_process_id;
-int tegra_cpu_speedo_id; /* only exist in Tegra30 and later */
-int tegra_soc_speedo_id;
-enum tegra_revision tegra_revision;
-
-static struct clk *fuse_clk;
-static int tegra_fuse_spare_bit;
-static void (*tegra_init_speedo_data)(void);
-
-/* The BCT to use at boot is specified by board straps that can be read
- * through a APB misc register and decoded. 2 bits, i.e. 4 possible BCTs.
- */
-int tegra_bct_strapping;
-
-#define STRAP_OPT 0x008
-#define GMI_AD0 (1 << 4)
-#define GMI_AD1 (1 << 5)
-#define RAM_ID_MASK (GMI_AD0 | GMI_AD1)
-#define RAM_CODE_SHIFT 4
-
-static const char *tegra_revision_name[TEGRA_REVISION_MAX] = {
- [TEGRA_REVISION_UNKNOWN] = "unknown",
- [TEGRA_REVISION_A01] = "A01",
- [TEGRA_REVISION_A02] = "A02",
- [TEGRA_REVISION_A03] = "A03",
- [TEGRA_REVISION_A03p] = "A03 prime",
- [TEGRA_REVISION_A04] = "A04",
-};
-
-static void tegra_fuse_enable_clk(void)
-{
- if (IS_ERR(fuse_clk))
- fuse_clk = clk_get_sys(NULL, "fuse");
- if (IS_ERR(fuse_clk))
- return;
- clk_prepare_enable(fuse_clk);
-}
-
-static void tegra_fuse_disable_clk(void)
-{
- if (IS_ERR(fuse_clk))
- return;
- clk_disable_unprepare(fuse_clk);
-}
-
-u32 tegra_fuse_readl(unsigned long offset)
-{
- return tegra_apb_readl(TEGRA_FUSE_BASE + offset);
-}
-
-bool tegra_spare_fuse(int bit)
-{
- bool ret;
-
- tegra_fuse_enable_clk();
-
- ret = tegra_fuse_readl(tegra_fuse_spare_bit + bit * 4);
-
- tegra_fuse_disable_clk();
-
- return ret;
-}
-
-static enum tegra_revision tegra_get_revision(u32 id)
-{
- u32 minor_rev = (id >> 16) & 0xf;
-
- switch (minor_rev) {
- case 1:
- return TEGRA_REVISION_A01;
- case 2:
- return TEGRA_REVISION_A02;
- case 3:
- if (tegra_get_chip_id() == TEGRA20 &&
- (tegra_spare_fuse(18) || tegra_spare_fuse(19)))
- return TEGRA_REVISION_A03p;
- else
- return TEGRA_REVISION_A03;
- case 4:
- return TEGRA_REVISION_A04;
- default:
- return TEGRA_REVISION_UNKNOWN;
- }
-}
-
-static void tegra_get_process_id(void)
-{
- u32 reg;
-
- tegra_fuse_enable_clk();
-
- reg = tegra_fuse_readl(tegra_fuse_spare_bit);
- tegra_cpu_process_id = (reg >> 6) & 3;
- reg = tegra_fuse_readl(tegra_fuse_spare_bit);
- tegra_core_process_id = (reg >> 12) & 3;
-
- tegra_fuse_disable_clk();
-}
-
-u32 tegra_read_chipid(void)
-{
- return readl_relaxed(IO_ADDRESS(TEGRA_APB_MISC_BASE) + 0x804);
-}
-
-u8 tegra_get_chip_id(void)
-{
- u32 id = tegra_read_chipid();
-
- return (id >> 8) & 0xff;
-}
-
-static void __init tegra20_fuse_init_randomness(void)
-{
- u32 randomness[2];
-
- randomness[0] = tegra_fuse_readl(FUSE_UID_LOW);
- randomness[1] = tegra_fuse_readl(FUSE_UID_HIGH);
-
- add_device_randomness(randomness, sizeof(randomness));
-}
-
-/* Applies to Tegra30 or later */
-static void __init tegra30_fuse_init_randomness(void)
-{
- u32 randomness[7];
-
- randomness[0] = tegra_fuse_readl(FUSE_VENDOR_CODE);
- randomness[1] = tegra_fuse_readl(FUSE_FAB_CODE);
- randomness[2] = tegra_fuse_readl(FUSE_LOT_CODE_0);
- randomness[3] = tegra_fuse_readl(FUSE_LOT_CODE_1);
- randomness[4] = tegra_fuse_readl(FUSE_WAFER_ID);
- randomness[5] = tegra_fuse_readl(FUSE_X_COORDINATE);
- randomness[6] = tegra_fuse_readl(FUSE_Y_COORDINATE);
-
- add_device_randomness(randomness, sizeof(randomness));
-}
-
-void __init tegra_init_fuse(void)
-{
- u32 id;
- u32 randomness[5];
- u8 chip_id;
-
- u32 reg = readl(IO_ADDRESS(TEGRA_CLK_RESET_BASE + 0x48));
- reg |= 1 << 28;
- writel(reg, IO_ADDRESS(TEGRA_CLK_RESET_BASE + 0x48));
-
- /*
- * Enable FUSE clock. This needs to be hardcoded because the clock
- * subsystem is not active during early boot.
- */
- reg = readl(IO_ADDRESS(TEGRA_CLK_RESET_BASE + 0x14));
- reg |= 1 << 7;
- writel(reg, IO_ADDRESS(TEGRA_CLK_RESET_BASE + 0x14));
- fuse_clk = ERR_PTR(-EINVAL);
-
- reg = tegra_fuse_readl(FUSE_SKU_INFO);
- randomness[0] = reg;
- tegra_sku_id = reg & 0xFF;
-
- reg = tegra_apb_readl(TEGRA_APB_MISC_BASE + STRAP_OPT);
- randomness[1] = reg;
- tegra_bct_strapping = (reg & RAM_ID_MASK) >> RAM_CODE_SHIFT;
-
- id = tegra_read_chipid();
- randomness[2] = id;
- chip_id = (id >> 8) & 0xff;
-
- switch (chip_id) {
- case TEGRA20:
- tegra_fuse_spare_bit = TEGRA20_FUSE_SPARE_BIT;
- tegra_init_speedo_data = &tegra20_init_speedo_data;
- break;
- case TEGRA30:
- tegra_fuse_spare_bit = TEGRA30_FUSE_SPARE_BIT;
- tegra_init_speedo_data = &tegra30_init_speedo_data;
- break;
- case TEGRA114:
- tegra_init_speedo_data = &tegra114_init_speedo_data;
- break;
- default:
- pr_warn("Tegra: unknown chip id %d\n", chip_id);
- tegra_fuse_spare_bit = TEGRA20_FUSE_SPARE_BIT;
- tegra_init_speedo_data = &tegra_get_process_id;
- }
-
- tegra_revision = tegra_get_revision(id);
- tegra_init_speedo_data();
- randomness[3] = (tegra_cpu_process_id << 16) | tegra_core_process_id;
- randomness[4] = (tegra_cpu_speedo_id << 16) | tegra_soc_speedo_id;
-
- add_device_randomness(randomness, sizeof(randomness));
- switch (chip_id) {
- case TEGRA20:
- tegra20_fuse_init_randomness();
- break;
- case TEGRA30:
- case TEGRA114:
- default:
- tegra30_fuse_init_randomness();
- break;
- }
-
- pr_info("Tegra Revision: %s SKU: %d CPU Process: %d Core Process: %d\n",
- tegra_revision_name[tegra_revision],
- tegra_sku_id, tegra_cpu_process_id,
- tegra_core_process_id);
-}
diff --git a/arch/arm/mach-tegra/fuse.h b/arch/arm/mach-tegra/fuse.h
deleted file mode 100644
index 48a48861c19b..000000000000
--- a/arch/arm/mach-tegra/fuse.h
+++ /dev/null
@@ -1,60 +0,0 @@
-/*
- * Copyright (C) 2010 Google, Inc.
- * Copyright (c) 2013, NVIDIA CORPORATION. All rights reserved.
- *
- * Author:
- * Colin Cross <ccross at android.com>
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that 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.
- *
- */
-
-#ifndef __MACH_TEGRA_FUSE_H
-#define __MACH_TEGRA_FUSE_H
-
-#define SKU_ID_T20 8
-#define SKU_ID_T25SE 20
-#define SKU_ID_AP25 23
-#define SKU_ID_T25 24
-#define SKU_ID_AP25E 27
-#define SKU_ID_T25E 28
-
-#ifndef __ASSEMBLY__
-
-extern int tegra_sku_id;
-extern int tegra_cpu_process_id;
-extern int tegra_core_process_id;
-extern int tegra_cpu_speedo_id; /* only exist in Tegra30 and later */
-extern int tegra_soc_speedo_id;
-
-unsigned long long tegra_chip_uid(void);
-bool tegra_spare_fuse(int bit);
-u32 tegra_fuse_readl(unsigned long offset);
-
-#ifdef CONFIG_ARCH_TEGRA_2x_SOC
-void tegra20_init_speedo_data(void);
-#else
-static inline void tegra20_init_speedo_data(void) {}
-#endif
-
-#ifdef CONFIG_ARCH_TEGRA_3x_SOC
-void tegra30_init_speedo_data(void);
-#else
-static inline void tegra30_init_speedo_data(void) {}
-#endif
-
-#ifdef CONFIG_ARCH_TEGRA_114_SOC
-void tegra114_init_speedo_data(void);
-#else
-static inline void tegra114_init_speedo_data(void) {}
-#endif
-#endif /* __ASSEMBLY__ */
-
-#endif
diff --git a/arch/arm/mach-tegra/reset.c b/arch/arm/mach-tegra/reset.c
index bb1e5a12d1d7..e997b2573893 100644
--- a/arch/arm/mach-tegra/reset.c
+++ b/arch/arm/mach-tegra/reset.c
@@ -24,7 +24,6 @@
#include <asm/firmware.h>
#include <asm/hardware/cache-l2x0.h>
-#include "fuse.h"
#include "iomap.h"
#include "irammap.h"
#include "reset.h"
diff --git a/arch/arm/mach-tegra/tegra.c b/arch/arm/mach-tegra/tegra.c
index f4c5f6469ee4..1d60be4975b8 100644
--- a/arch/arm/mach-tegra/tegra.c
+++ b/arch/arm/mach-tegra/tegra.c
@@ -103,7 +103,8 @@ static void __init tegra_dt_init(void)
goto out;
soc_dev_attr->family = kasprintf(GFP_KERNEL, "Tegra");
- soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%d", tegra_revision);
+ soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%d",
+ tegra_sku_info.revision);
soc_dev_attr->soc_id = kasprintf(GFP_KERNEL, "%u", tegra_get_chip_id());
soc_dev = soc_device_register(soc_dev_attr);
diff --git a/drivers/misc/fuse/Makefile b/drivers/misc/fuse/Makefile
new file mode 100644
index 000000000000..0679c4febc89
--- /dev/null
+++ b/drivers/misc/fuse/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_ARCH_TEGRA) += tegra/
diff --git a/drivers/soc/Makefile b/drivers/soc/Makefile
index 0f7c44793b29..3b1b95d932d1 100644
--- a/drivers/soc/Makefile
+++ b/drivers/soc/Makefile
@@ -3,3 +3,4 @@
#
obj-$(CONFIG_ARCH_QCOM) += qcom/
+obj-$(CONFIG_ARCH_TEGRA) += tegra/
diff --git a/drivers/soc/tegra/Makefile b/drivers/soc/tegra/Makefile
new file mode 100644
index 000000000000..236600f91bb3
--- /dev/null
+++ b/drivers/soc/tegra/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_ARCH_TEGRA) += fuse/
diff --git a/drivers/soc/tegra/fuse/Makefile b/drivers/soc/tegra/fuse/Makefile
new file mode 100644
index 000000000000..3af357da91f3
--- /dev/null
+++ b/drivers/soc/tegra/fuse/Makefile
@@ -0,0 +1,8 @@
+obj-y += fuse-tegra.o
+obj-y += fuse-tegra30.o
+obj-y += tegra-apbmisc.o
+obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += fuse-tegra20.o
+obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += speedo-tegra20.o
+obj-$(CONFIG_ARCH_TEGRA_3x_SOC) += speedo-tegra30.o
+obj-$(CONFIG_ARCH_TEGRA_114_SOC) += speedo-tegra114.o
+obj-$(CONFIG_ARCH_TEGRA_124_SOC) += speedo-tegra124.o
diff --git a/drivers/soc/tegra/fuse/fuse-tegra.c b/drivers/soc/tegra/fuse/fuse-tegra.c
new file mode 100644
index 000000000000..6a6dac1754b1
--- /dev/null
+++ b/drivers/soc/tegra/fuse/fuse-tegra.c
@@ -0,0 +1,155 @@
+/*
+ * Copyright (c) 2013-2014, 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 <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <linux/device.h>
+#include <linux/kobject.h>
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/io.h>
+#include <linux/tegra-soc.h>
+
+#include "fuse.h"
+
+static u32 (*fuse_readl)(const unsigned int offset);
+static int fuse_size;
+struct tegra_sku_info tegra_sku_info;
+
+static const char *tegra_revision_name[TEGRA_REVISION_MAX] = {
+ [TEGRA_REVISION_UNKNOWN] = "unknown",
+ [TEGRA_REVISION_A01] = "A01",
+ [TEGRA_REVISION_A02] = "A02",
+ [TEGRA_REVISION_A03] = "A03",
+ [TEGRA_REVISION_A03p] = "A03 prime",
+ [TEGRA_REVISION_A04] = "A04",
+};
+
+static u8 fuse_readb(const unsigned int offset)
+{
+ u32 val;
+
+ val = fuse_readl(round_down(offset, 4));
+ val >>= (offset % 4) * 8;
+ val &= 0xff;
+
+ return val;
+}
+
+static ssize_t fuse_read(struct file *fd, struct kobject *kobj,
+ struct bin_attribute *attr, char *buf,
+ loff_t pos, size_t size)
+{
+ int i;
+
+ if (pos < 0 || pos >= fuse_size)
+ return 0;
+
+ if (size > fuse_size - pos)
+ size = fuse_size - pos;
+
+ for (i = 0; i < size; i++)
+ buf[i] = fuse_readb(pos + i);
+
+ return i;
+}
+
+static struct bin_attribute fuse_bin_attr = {
+ .attr = { .name = "fuse", .mode = S_IRUGO, },
+ .read = fuse_read,
+};
+
+static const struct of_device_id car_match[] __initconst = {
+ { .compatible = "nvidia,tegra20-car", },
+ { .compatible = "nvidia,tegra30-car", },
+ { .compatible = "nvidia,tegra114-car", },
+ { .compatible = "nvidia,tegra124-car", },
+ {},
+};
+
+static void tegra_enable_fuse_clk(void __iomem *base)
+{
+ u32 reg;
+
+ reg = readl_relaxed(base + 0x48);
+ reg |= 1 << 28;
+ writel(reg, base + 0x48);
+
+ /*
+ * Enable FUSE clock. This needs to be hardcoded because the clock
+ * subsystem is not active during early boot.
+ */
+ reg = readl(base + 0x14);
+ reg |= 1 << 7;
+ writel(reg, base + 0x14);
+}
+
+int tegra_fuse_readl(unsigned long offset, u32 *value)
+{
+ if (!fuse_readl)
+ return -EPROBE_DEFER;
+
+ *value = fuse_readl(offset);
+
+ return 0;
+}
+EXPORT_SYMBOL(tegra_fuse_readl);
+
+int tegra_fuse_create_sysfs(struct device *dev, int size,
+ u32 (*readl)(const unsigned int offset))
+{
+ if (fuse_size)
+ return -ENODEV;
+
+ fuse_bin_attr.size = size;
+ fuse_bin_attr.read = fuse_read;
+
+ fuse_size = size;
+ fuse_readl = readl;
+
+ return device_create_bin_file(dev, &fuse_bin_attr);
+}
+
+void __init tegra_init_fuse(void)
+{
+ struct device_node *np;
+ void __iomem *car_base;
+
+ tegra_init_apbmisc();
+
+ np = of_find_matching_node(NULL, car_match);
+ car_base = of_iomap(np, 0);
+ if (car_base) {
+ tegra_enable_fuse_clk(car_base);
+ iounmap(car_base);
+ } else {
+ pr_err("Could not enable fuse clk. ioremap tegra car failed.\n");
+ return;
+ }
+
+ if (tegra_get_chip_id() == TEGRA20)
+ tegra20_init_fuse_early();
+ else
+ tegra30_init_fuse_early();
+
+ pr_info("Tegra Revision: %s SKU: %d CPU Process: %d Core Process: %d\n",
+ tegra_revision_name[tegra_sku_info.revision],
+ tegra_sku_info.sku_id, tegra_sku_info.cpu_process_id,
+ tegra_sku_info.core_process_id);
+ pr_debug("Tegra CPU Speedo ID %d, Soc Speedo ID %d\n",
+ tegra_sku_info.cpu_speedo_id, tegra_sku_info.soc_speedo_id);
+}
diff --git a/drivers/soc/tegra/fuse/fuse-tegra20.c b/drivers/soc/tegra/fuse/fuse-tegra20.c
new file mode 100644
index 000000000000..09f91bf8c743
--- /dev/null
+++ b/drivers/soc/tegra/fuse/fuse-tegra20.c
@@ -0,0 +1,141 @@
+/*
+ * Copyright (c) 2013-2014, 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 <http://www.gnu.org/licenses/>.
+ *
+ * Based on drivers/misc/eeprom/sunxi_sid.c
+ */
+
+#include <linux/device.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/kobject.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/random.h>
+#include <linux/tegra-soc.h>
+
+#include "fuse.h"
+
+#define FUSE_BEGIN 0x100
+#define FUSE_SIZE 0x1f8
+#define FUSE_UID_LOW 0x08
+#define FUSE_UID_HIGH 0x0c
+
+static phys_addr_t fuse_phys;
+static struct clk *fuse_clk;
+static void __iomem __initdata *fuse_base;
+
+static u32 tegra20_fuse_readl(const unsigned int offset)
+{
+ int ret;
+ u32 val;
+
+ clk_prepare_enable(fuse_clk);
+
+ ret = tegra_apb_readl_using_dma(fuse_phys + FUSE_BEGIN + offset, &val);
+
+ clk_disable_unprepare(fuse_clk);
+
+ return (ret < 0) ? 0 : val;
+}
+
+static const struct of_device_id tegra20_fuse_of_match[] = {
+ { .compatible = "nvidia,tegra20-efuse" },
+ {},
+};
+
+static int tegra20_fuse_probe(struct platform_device *pdev)
+{
+ struct resource *res;
+
+ fuse_clk = devm_clk_get(&pdev->dev, NULL);
+ if (IS_ERR(fuse_clk)) {
+ dev_err(&pdev->dev, "missing clock");
+ return PTR_ERR(fuse_clk);
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res)
+ return -EINVAL;
+ fuse_phys = res->start;
+
+ if (tegra_fuse_create_sysfs(&pdev->dev, FUSE_SIZE, tegra20_fuse_readl))
+ return -ENODEV;
+
+ dev_dbg(&pdev->dev, "loaded\n");
+
+ return 0;
+}
+
+static struct platform_driver tegra20_fuse_driver = {
+ .probe = tegra20_fuse_probe,
+ .driver = {
+ .name = "tegra20_fuse",
+ .owner = THIS_MODULE,
+ .of_match_table = tegra20_fuse_of_match,
+ }
+};
+
+static int __init tegra20_fuse_init(void)
+{
+ return platform_driver_register(&tegra20_fuse_driver);
+}
+postcore_initcall(tegra20_fuse_init);
+
+/* Early boot code. This code is called before the devices are created */
+
+u32 __init tegra20_fuse_early(const unsigned int offset)
+{
+ return readl_relaxed(fuse_base + FUSE_BEGIN + offset);
+}
+
+bool __init tegra20_spare_fuse_early(int spare_bit)
+{
+ u32 offset = spare_bit * 4;
+ bool value;
+
+ value = tegra20_fuse_early(offset + 0x100);
+
+ return value;
+}
+
+static void __init tegra20_fuse_add_randomness(void)
+{
+ u32 randomness[7];
+
+ randomness[0] = tegra_sku_info.sku_id;
+ randomness[1] = tegra_read_straps();
+ randomness[2] = tegra_read_chipid();
+ randomness[3] = tegra_sku_info.cpu_process_id << 16;
+ randomness[3] |= tegra_sku_info.core_process_id;
+ randomness[4] = tegra_sku_info.cpu_speedo_id << 16;
+ randomness[4] |= tegra_sku_info.soc_speedo_id;
+ randomness[5] = tegra20_fuse_early(FUSE_UID_LOW);
+ randomness[6] = tegra20_fuse_early(FUSE_UID_HIGH);
+
+ add_device_randomness(randomness, sizeof(randomness));
+}
+
+void __init tegra20_init_fuse_early(void)
+{
+ fuse_base = ioremap(TEGRA_FUSE_BASE, TEGRA_FUSE_SIZE);
+
+ tegra_init_revision();
+ tegra20_init_speedo_data(&tegra_sku_info);
+ tegra20_fuse_add_randomness();
+
+ iounmap(fuse_base);
+}
diff --git a/drivers/soc/tegra/fuse/fuse-tegra30.c b/drivers/soc/tegra/fuse/fuse-tegra30.c
new file mode 100644
index 000000000000..a4cfb11ac15c
--- /dev/null
+++ b/drivers/soc/tegra/fuse/fuse-tegra30.c
@@ -0,0 +1,223 @@
+/*
+ * Copyright (c) 2013-2014, 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 <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <linux/device.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/of_device.h>
+#include <linux/of_address.h>
+#include <linux/platform_device.h>
+#include <linux/random.h>
+#include <linux/tegra-soc.h>
+
+#include "fuse.h"
+
+#define FUSE_BEGIN 0x100
+
+/* Tegra30 and later */
+#define FUSE_VENDOR_CODE 0x100
+#define FUSE_FAB_CODE 0x104
+#define FUSE_LOT_CODE_0 0x108
+#define FUSE_LOT_CODE_1 0x10c
+#define FUSE_WAFER_ID 0x110
+#define FUSE_X_COORDINATE 0x114
+#define FUSE_Y_COORDINATE 0x118
+
+#define FUSE_HAS_REVISION_INFO BIT(0)
+
+enum speedo_idx {
+ SPEEDO_TEGRA30 = 0,
+ SPEEDO_TEGRA114,
+ SPEEDO_TEGRA124,
+};
+
+struct tegra_fuse_info {
+ int size;
+ int spare_bit;
+ enum speedo_idx speedo_idx;
+};
+
+static void __iomem *fuse_base;
+static struct clk *fuse_clk;
+static struct tegra_fuse_info *fuse_info;
+
+u32 tegra30_fuse_readl(const unsigned int offset)
+{
+ u32 val;
+
+ /*
+ * early in the boot, the fuse clock will be enabled by
+ * tegra_init_fuse()
+ */
+
+ if (fuse_clk)
+ clk_prepare_enable(fuse_clk);
+
+ val = readl_relaxed(fuse_base + FUSE_BEGIN + offset);
+
+ if (fuse_clk)
+ clk_disable_unprepare(fuse_clk);
+
+ return val;
+}
+
+static struct tegra_fuse_info tegra30_info = {
+ .size = 0x2a4,
+ .spare_bit = 0x144,
+ .speedo_idx = SPEEDO_TEGRA30,
+};
+
+static struct tegra_fuse_info tegra114_info = {
+ .size = 0x2a0,
+ .speedo_idx = SPEEDO_TEGRA114,
+};
+
+static struct tegra_fuse_info tegra124_info = {
+ .size = 0x300,
+ .speedo_idx = SPEEDO_TEGRA124,
+};
+
+static const struct of_device_id tegra30_fuse_of_match[] = {
+ { .compatible = "nvidia,tegra30-efuse", .data = &tegra30_info },
+ { .compatible = "nvidia,tegra114-efuse", .data = &tegra114_info },
+ { .compatible = "nvidia,tegra124-efuse", .data = &tegra124_info },
+ {},
+};
+
+static int tegra30_fuse_probe(struct platform_device *pdev)
+{
+ const struct of_device_id *of_dev_id;
+
+ of_dev_id = of_match_device(tegra30_fuse_of_match, &pdev->dev);
+ if (!of_dev_id)
+ return -ENODEV;
+
+ fuse_clk = devm_clk_get(&pdev->dev, NULL);
+ if (IS_ERR(fuse_clk)) {
+ dev_err(&pdev->dev, "missing clock");
+ return PTR_ERR(fuse_clk);
+ }
+
+ platform_set_drvdata(pdev, NULL);
+
+ if (tegra_fuse_create_sysfs(&pdev->dev, fuse_info->size,
+ tegra30_fuse_readl))
+ return -ENODEV;
+
+ dev_dbg(&pdev->dev, "loaded\n");
+
+ return 0;
+}
+
+static struct platform_driver tegra30_fuse_driver = {
+ .probe = tegra30_fuse_probe,
+ .driver = {
+ .name = "tegra_fuse",
+ .owner = THIS_MODULE,
+ .of_match_table = tegra30_fuse_of_match,
+ }
+};
+
+static int __init tegra30_fuse_init(void)
+{
+ return platform_driver_register(&tegra30_fuse_driver);
+}
+postcore_initcall(tegra30_fuse_init);
+
+/* Early boot code. This code is called before the devices are created */
+
+typedef void (*speedo_f)(struct tegra_sku_info *sku_info);
+
+static speedo_f __initdata speedo_tbl[] = {
+ [SPEEDO_TEGRA30] = tegra30_init_speedo_data,
+ [SPEEDO_TEGRA114] = tegra114_init_speedo_data,
+ [SPEEDO_TEGRA124] = tegra124_init_speedo_data,
+};
+
+static void __init tegra30_fuse_add_randomness(void)
+{
+ u32 randomness[12];
+
+ randomness[0] = tegra_sku_info.sku_id;
+ randomness[1] = tegra_read_straps();
+ randomness[2] = tegra_read_chipid();
+ randomness[3] = tegra_sku_info.cpu_process_id << 16;
+ randomness[3] |= tegra_sku_info.core_process_id;
+ randomness[4] = tegra_sku_info.cpu_speedo_id << 16;
+ randomness[4] |= tegra_sku_info.soc_speedo_id;
+ randomness[5] = tegra30_fuse_readl(FUSE_VENDOR_CODE);
+ randomness[6] = tegra30_fuse_readl(FUSE_FAB_CODE);
+ randomness[7] = tegra30_fuse_readl(FUSE_LOT_CODE_0);
+ randomness[8] = tegra30_fuse_readl(FUSE_LOT_CODE_1);
+ randomness[9] = tegra30_fuse_readl(FUSE_WAFER_ID);
+ randomness[10] = tegra30_fuse_readl(FUSE_X_COORDINATE);
+ randomness[11] = tegra30_fuse_readl(FUSE_Y_COORDINATE);
+
+ add_device_randomness(randomness, sizeof(randomness));
+}
+
+static void __init legacy_fuse_init(void)
+{
+ switch (tegra_get_chip_id()) {
+ case TEGRA30:
+ fuse_info = &tegra30_info;
+ break;
+ case TEGRA114:
+ fuse_info = &tegra114_info;
+ break;
+ case TEGRA124:
+ fuse_info = &tegra124_info;
+ break;
+ default:
+ return;
+ }
+
+ fuse_base = ioremap(TEGRA_FUSE_BASE, TEGRA_FUSE_SIZE);
+}
+
+bool __init tegra30_spare_fuse(int spare_bit)
+{
+ u32 offset = fuse_info->spare_bit + spare_bit * 4;
+
+ return tegra30_fuse_readl(offset) & 1;
+}
+
+void __init tegra30_init_fuse_early(void)
+{
+ struct device_node *np;
+ const struct of_device_id *of_match;
+
+ np = of_find_matching_node_and_match(NULL, tegra30_fuse_of_match,
+ &of_match);
+ if (np) {
+ fuse_base = of_iomap(np, 0);
+ fuse_info = (struct tegra_fuse_info *)of_match->data;
+ } else
+ legacy_fuse_init();
+
+ if (!fuse_base) {
+ pr_warn("fuse DT node missing and unknown chip id: 0x%02x\n",
+ tegra_get_chip_id());
+ return;
+ }
+
+ tegra_init_revision();
+ speedo_tbl[fuse_info->speedo_idx](&tegra_sku_info);
+ tegra30_fuse_add_randomness();
+}
diff --git a/drivers/soc/tegra/fuse/fuse.h b/drivers/soc/tegra/fuse/fuse.h
new file mode 100644
index 000000000000..b3442770df09
--- /dev/null
+++ b/drivers/soc/tegra/fuse/fuse.h
@@ -0,0 +1,71 @@
+/*
+ * Copyright (C) 2010 Google, Inc.
+ * Copyright (c) 2013, NVIDIA CORPORATION. All rights reserved.
+ *
+ * Author:
+ * Colin Cross <ccross at android.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that 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.
+ *
+ */
+
+#ifndef __DRIVERS_MISC_TEGRA_FUSE_H
+#define __DRIVERS_MISC_TEGRA_FUSE_H
+
+#define TEGRA_FUSE_BASE 0x7000f800
+#define TEGRA_FUSE_SIZE 0x400
+
+int tegra_fuse_create_sysfs(struct device *dev, int size,
+ u32 (*readl)(const unsigned int offset));
+
+bool tegra30_spare_fuse(int bit);
+u32 tegra30_fuse_readl(const unsigned int offset);
+void tegra30_init_fuse_early(void);
+void tegra_init_revision(void);
+void tegra_init_apbmisc(void);
+
+#ifdef CONFIG_ARCH_TEGRA_2x_SOC
+void tegra20_init_speedo_data(struct tegra_sku_info *sku_info);
+bool tegra20_spare_fuse_early(int spare_bit);
+void tegra20_init_fuse_early(void);
+u32 tegra20_fuse_early(const unsigned int offset);
+#else
+static inline void tegra20_init_speedo_data(struct tegra_sku_info *sku_info) {}
+static inline bool tegra20_spare_fuse_early(int spare_bit, void *fuse_base)
+{
+ return false;
+}
+static inline void tegra20_init_fuse_early(void);
+static inline tegra20_fuse_early(const unsigned int offset);
+{
+ return 0;
+}
+#endif
+
+
+#ifdef CONFIG_ARCH_TEGRA_3x_SOC
+void tegra30_init_speedo_data(struct tegra_sku_info *sku_info);
+#else
+static inline void tegra30_init_speedo_data(struct tegra_sku_info *sku_info) {}
+#endif
+
+#ifdef CONFIG_ARCH_TEGRA_114_SOC
+void tegra114_init_speedo_data(struct tegra_sku_info *sku_info);
+#else
+static inline void tegra114_init_speedo_data(struct tegra_sku_info *sku_info) {}
+#endif
+
+#ifdef CONFIG_ARCH_TEGRA_124_SOC
+void tegra124_init_speedo_data(struct tegra_sku_info *sku_info);
+#else
+static inline void tegra124_init_speedo_data(struct tegra_sku_info *sku_info) {}
+#endif
+
+#endif
diff --git a/arch/arm/mach-tegra/tegra114_speedo.c b/drivers/soc/tegra/fuse/speedo-tegra114.c
similarity index 56%
rename from arch/arm/mach-tegra/tegra114_speedo.c
rename to drivers/soc/tegra/fuse/speedo-tegra114.c
index f086a3ea291e..98d6cde33646 100644
--- a/arch/arm/mach-tegra/tegra114_speedo.c
+++ b/drivers/soc/tegra/fuse/speedo-tegra114.c
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2013, NVIDIA CORPORATION. All rights reserved.
+ * Copyright (c) 2013-2014, 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,
@@ -14,14 +14,15 @@
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
-#include <linux/bug.h>
+#include <linux/device.h>
#include <linux/kernel.h>
+#include <linux/bug.h>
#include <linux/tegra-soc.h>
#include "fuse.h"
-#define CORE_PROCESS_CORNERS_NUM 2
-#define CPU_PROCESS_CORNERS_NUM 2
+#define CORE_PROCESS_CORNERS 2
+#define CPU_PROCESS_CORNERS 2
enum {
THRESHOLD_INDEX_0,
@@ -29,54 +30,57 @@ enum {
THRESHOLD_INDEX_COUNT,
};
-static const u32 core_process_speedos[][CORE_PROCESS_CORNERS_NUM] = {
+static const u32 __initconst core_process_speedos[][CORE_PROCESS_CORNERS] = {
{1123, UINT_MAX},
{0, UINT_MAX},
};
-static const u32 cpu_process_speedos[][CPU_PROCESS_CORNERS_NUM] = {
+static const u32 __initconst cpu_process_speedos[][CPU_PROCESS_CORNERS] = {
{1695, UINT_MAX},
{0, UINT_MAX},
};
-static void rev_sku_to_speedo_ids(int rev, int sku, int *threshold)
+static void __init rev_sku_to_speedo_ids(struct tegra_sku_info *sku_info,
+ int *threshold)
{
u32 tmp;
+ u32 sku = sku_info->sku_id;
+ enum tegra_revision rev = sku_info->revision;
switch (sku) {
case 0x00:
case 0x10:
case 0x05:
case 0x06:
- tegra_cpu_speedo_id = 1;
- tegra_soc_speedo_id = 0;
+ sku_info->cpu_speedo_id = 1;
+ sku_info->soc_speedo_id = 0;
*threshold = THRESHOLD_INDEX_0;
break;
case 0x03:
case 0x04:
- tegra_cpu_speedo_id = 2;
- tegra_soc_speedo_id = 1;
+ sku_info->cpu_speedo_id = 2;
+ sku_info->soc_speedo_id = 1;
*threshold = THRESHOLD_INDEX_1;
break;
default:
- pr_err("Tegra114 Unknown SKU %d\n", sku);
- tegra_cpu_speedo_id = 0;
- tegra_soc_speedo_id = 0;
+ pr_err("Tegra Unknown SKU %d\n", sku);
+ sku_info->cpu_speedo_id = 0;
+ sku_info->soc_speedo_id = 0;
*threshold = THRESHOLD_INDEX_0;
break;
}
if (rev == TEGRA_REVISION_A01) {
- tmp = tegra_fuse_readl(0x270) << 1;
- tmp |= tegra_fuse_readl(0x26c);
+ tmp = tegra30_fuse_readl(0x270) << 1;
+ tmp |= tegra30_fuse_readl(0x26c);
if (!tmp)
- tegra_cpu_speedo_id = 0;
+ sku_info->cpu_speedo_id = 0;
}
}
-void tegra114_init_speedo_data(void)
+void __init tegra114_init_speedo_data(struct tegra_sku_info *sku_info)
{
u32 cpu_speedo_val;
u32 core_speedo_val;
@@ -88,18 +92,18 @@ void tegra114_init_speedo_data(void)
BUILD_BUG_ON(ARRAY_SIZE(core_process_speedos) !=
THRESHOLD_INDEX_COUNT);
- rev_sku_to_speedo_ids(tegra_revision, tegra_sku_id, &threshold);
+ rev_sku_to_speedo_ids(sku_info, &threshold);
- cpu_speedo_val = tegra_fuse_readl(0x12c) + 1024;
- core_speedo_val = tegra_fuse_readl(0x134);
+ cpu_speedo_val = tegra30_fuse_readl(0x12c) + 1024;
+ core_speedo_val = tegra30_fuse_readl(0x134);
- for (i = 0; i < CPU_PROCESS_CORNERS_NUM; i++)
+ for (i = 0; i < CPU_PROCESS_CORNERS; i++)
if (cpu_speedo_val < cpu_process_speedos[threshold][i])
break;
- tegra_cpu_process_id = i;
+ sku_info->cpu_process_id = i;
- for (i = 0; i < CORE_PROCESS_CORNERS_NUM; i++)
+ for (i = 0; i < CORE_PROCESS_CORNERS; i++)
if (core_speedo_val < core_process_speedos[threshold][i])
break;
- tegra_core_process_id = i;
+ sku_info->core_process_id = i;
}
diff --git a/drivers/soc/tegra/fuse/speedo-tegra124.c b/drivers/soc/tegra/fuse/speedo-tegra124.c
new file mode 100644
index 000000000000..a15dd537f2ab
--- /dev/null
+++ b/drivers/soc/tegra/fuse/speedo-tegra124.c
@@ -0,0 +1,167 @@
+/*
+ * Copyright (c) 2013-2014, 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 <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/bug.h>
+#include <linux/tegra-soc.h>
+
+#include "fuse.h"
+
+#define CPU_PROCESS_CORNERS 2
+#define GPU_PROCESS_CORNERS 2
+#define CORE_PROCESS_CORNERS 2
+
+#define FUSE_CPU_SPEEDO_0 0x14
+#define FUSE_CPU_SPEEDO_1 0x2c
+#define FUSE_CPU_SPEEDO_2 0x30
+#define FUSE_SOC_SPEEDO_0 0x34
+#define FUSE_SOC_SPEEDO_1 0x38
+#define FUSE_SOC_SPEEDO_2 0x3c
+#define FUSE_CPU_IDDQ 0x18
+#define FUSE_SOC_IDDQ 0x40
+#define FUSE_GPU_IDDQ 0x128
+#define FUSE_FT_REV 0x28
+
+enum {
+ THRESHOLD_INDEX_0,
+ THRESHOLD_INDEX_1,
+ THRESHOLD_INDEX_COUNT,
+};
+
+static const u32 __initconst cpu_process_speedos[][CPU_PROCESS_CORNERS] = {
+ {2190, UINT_MAX},
+ {0, UINT_MAX},
+};
+
+static const u32 __initconst gpu_process_speedos[][GPU_PROCESS_CORNERS] = {
+ {1965, UINT_MAX},
+ {0, UINT_MAX},
+};
+
+static const u32 __initconst core_process_speedos[][CORE_PROCESS_CORNERS] = {
+ {2101, UINT_MAX},
+ {0, UINT_MAX},
+};
+
+static void __init rev_sku_to_speedo_ids(struct tegra_sku_info *sku_info,
+ int *threshold)
+{
+ int sku = sku_info->sku_id;
+
+ /* Assign to default */
+ sku_info->cpu_speedo_id = 0;
+ sku_info->soc_speedo_id = 0;
+ sku_info->gpu_speedo_id = 0;
+ *threshold = THRESHOLD_INDEX_0;
+
+ switch (sku) {
+ case 0x00: /* Eng sku */
+ case 0x0F:
+ case 0x23:
+ /* Using the default */
+ break;
+ case 0x83:
+ sku_info->cpu_speedo_id = 2;
+ break;
+
+ case 0x1F:
+ case 0x87:
+ case 0x27:
+ sku_info->cpu_speedo_id = 2;
+ sku_info->soc_speedo_id = 0;
+ sku_info->gpu_speedo_id = 1;
+ *threshold = THRESHOLD_INDEX_0;
+ break;
+ case 0x81:
+ case 0x21:
+ case 0x07:
+ sku_info->cpu_speedo_id = 1;
+ sku_info->soc_speedo_id = 1;
+ sku_info->gpu_speedo_id = 1;
+ *threshold = THRESHOLD_INDEX_1;
+ break;
+ case 0x49:
+ case 0x4A:
+ case 0x48:
+ sku_info->cpu_speedo_id = 4;
+ sku_info->soc_speedo_id = 2;
+ sku_info->gpu_speedo_id = 3;
+ *threshold = THRESHOLD_INDEX_1;
+ break;
+ default:
+ pr_err("Tegra Unknown SKU %d\n", sku);
+ /* Using the default for the error case */
+ break;
+ }
+}
+
+void __init tegra124_init_speedo_data(struct tegra_sku_info *sku_info)
+{
+ int i, threshold, cpu_speedo_0_value, soc_speedo_0_value;
+ int cpu_iddq_value, gpu_iddq_value, soc_iddq_value;
+
+ BUILD_BUG_ON(ARRAY_SIZE(cpu_process_speedos) !=
+ THRESHOLD_INDEX_COUNT);
+ BUILD_BUG_ON(ARRAY_SIZE(gpu_process_speedos) !=
+ THRESHOLD_INDEX_COUNT);
+ BUILD_BUG_ON(ARRAY_SIZE(core_process_speedos) !=
+ THRESHOLD_INDEX_COUNT);
+
+ cpu_speedo_0_value = tegra30_fuse_readl(FUSE_CPU_SPEEDO_0);
+
+ /* GPU Speedo is stored in CPU_SPEEDO_2 */
+ sku_info->gpu_speedo_value = tegra30_fuse_readl(FUSE_CPU_SPEEDO_2);
+
+ soc_speedo_0_value = tegra30_fuse_readl(FUSE_SOC_SPEEDO_0);
+
+ cpu_iddq_value = tegra30_fuse_readl(FUSE_CPU_IDDQ);
+ soc_iddq_value = tegra30_fuse_readl(FUSE_SOC_IDDQ);
+ gpu_iddq_value = tegra30_fuse_readl(FUSE_GPU_IDDQ);
+
+ sku_info->cpu_speedo_value = cpu_speedo_0_value;
+
+ if (sku_info->cpu_speedo_value == 0) {
+ pr_warn("Tegra Warning: Speedo value not fused.\n");
+ WARN_ON(1);
+ return;
+ }
+
+ rev_sku_to_speedo_ids(sku_info, &threshold);
+
+ sku_info->cpu_iddq_value = tegra30_fuse_readl(FUSE_CPU_IDDQ);
+
+ for (i = 0; i < GPU_PROCESS_CORNERS; i++)
+ if (sku_info->gpu_speedo_value <
+ gpu_process_speedos[threshold][i])
+ break;
+ sku_info->gpu_process_id = i;
+
+ for (i = 0; i < CPU_PROCESS_CORNERS; i++)
+ if (sku_info->cpu_speedo_value <
+ cpu_process_speedos[threshold][i])
+ break;
+ sku_info->cpu_process_id = i;
+
+ for (i = 0; i < CORE_PROCESS_CORNERS; i++)
+ if (soc_speedo_0_value <
+ core_process_speedos[threshold][i])
+ break;
+ sku_info->core_process_id = i;
+
+ pr_debug("Tegra GPU Speedo ID=%d, Speedo Value=%d\n",
+ sku_info->gpu_speedo_id, sku_info->gpu_speedo_value);
+}
diff --git a/arch/arm/mach-tegra/tegra20_speedo.c b/drivers/soc/tegra/fuse/speedo-tegra20.c
similarity index 68%
rename from arch/arm/mach-tegra/tegra20_speedo.c
rename to drivers/soc/tegra/fuse/speedo-tegra20.c
index 83431011a23c..c951fa45ad34 100644
--- a/arch/arm/mach-tegra/tegra20_speedo.c
+++ b/drivers/soc/tegra/fuse/speedo-tegra20.c
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
+ * Copyright (c) 2012-2014, 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,
@@ -14,8 +14,9 @@
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
-#include <linux/bug.h>
#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/bug.h>
#include <linux/tegra-soc.h>
#include "fuse.h"
@@ -48,19 +49,19 @@ enum {
SPEEDO_ID_COUNT,
};
-static const u32 cpu_process_speedos[][PROCESS_CORNERS_NUM] = {
+static const u32 __initconst cpu_process_speedos[][PROCESS_CORNERS_NUM] = {
{315, 366, 420, UINT_MAX},
{303, 368, 419, UINT_MAX},
{316, 331, 383, UINT_MAX},
};
-static const u32 core_process_speedos[][PROCESS_CORNERS_NUM] = {
+static const u32 __initconst core_process_speedos[][PROCESS_CORNERS_NUM] = {
{165, 195, 224, UINT_MAX},
{165, 195, 224, UINT_MAX},
{165, 195, 224, UINT_MAX},
};
-void tegra20_init_speedo_data(void)
+void __init tegra20_init_speedo_data(struct tegra_sku_info *sku_info)
{
u32 reg;
u32 val;
@@ -69,42 +70,40 @@ void tegra20_init_speedo_data(void)
BUILD_BUG_ON(ARRAY_SIZE(cpu_process_speedos) != SPEEDO_ID_COUNT);
BUILD_BUG_ON(ARRAY_SIZE(core_process_speedos) != SPEEDO_ID_COUNT);
- if (SPEEDO_ID_SELECT_0(tegra_revision))
- tegra_soc_speedo_id = SPEEDO_ID_0;
- else if (SPEEDO_ID_SELECT_1(tegra_sku_id))
- tegra_soc_speedo_id = SPEEDO_ID_1;
+ if (SPEEDO_ID_SELECT_0(sku_info->revision))
+ sku_info->soc_speedo_id = SPEEDO_ID_0;
+ else if (SPEEDO_ID_SELECT_1(sku_info->sku_id))
+ sku_info->soc_speedo_id = SPEEDO_ID_1;
else
- tegra_soc_speedo_id = SPEEDO_ID_2;
+ sku_info->soc_speedo_id = SPEEDO_ID_2;
val = 0;
for (i = CPU_SPEEDO_MSBIT; i >= CPU_SPEEDO_LSBIT; i--) {
- reg = tegra_spare_fuse(i) |
- tegra_spare_fuse(i + CPU_SPEEDO_REDUND_OFFS);
+ reg = tegra20_spare_fuse_early(i) |
+ tegra20_spare_fuse_early(i + CPU_SPEEDO_REDUND_OFFS);
val = (val << 1) | (reg & 0x1);
}
val = val * SPEEDO_MULT;
- pr_debug("%s CPU speedo value %u\n", __func__, val);
+ pr_debug("Tegra CPU speedo value %u\n", val);
for (i = 0; i < (PROCESS_CORNERS_NUM - 1); i++) {
- if (val <= cpu_process_speedos[tegra_soc_speedo_id][i])
+ if (val <= cpu_process_speedos[sku_info->soc_speedo_id][i])
break;
}
- tegra_cpu_process_id = i;
+ sku_info->cpu_process_id = i;
val = 0;
for (i = CORE_SPEEDO_MSBIT; i >= CORE_SPEEDO_LSBIT; i--) {
- reg = tegra_spare_fuse(i) |
- tegra_spare_fuse(i + CORE_SPEEDO_REDUND_OFFS);
+ reg = tegra20_spare_fuse_early(i) |
+ tegra20_spare_fuse_early(i + CORE_SPEEDO_REDUND_OFFS);
val = (val << 1) | (reg & 0x1);
}
val = val * SPEEDO_MULT;
- pr_debug("%s Core speedo value %u\n", __func__, val);
+ pr_debug("Core speedo value %u\n", val);
for (i = 0; i < (PROCESS_CORNERS_NUM - 1); i++) {
- if (val <= core_process_speedos[tegra_soc_speedo_id][i])
+ if (val <= core_process_speedos[sku_info->soc_speedo_id][i])
break;
}
- tegra_core_process_id = i;
-
- pr_info("Tegra20 Soc Speedo ID %d", tegra_soc_speedo_id);
+ sku_info->core_process_id = i;
}
diff --git a/arch/arm/mach-tegra/tegra30_speedo.c b/drivers/soc/tegra/fuse/speedo-tegra30.c
similarity index 53%
rename from arch/arm/mach-tegra/tegra30_speedo.c
rename to drivers/soc/tegra/fuse/speedo-tegra30.c
index 4dda681bdaf9..1a85ad83fe5a 100644
--- a/arch/arm/mach-tegra/tegra30_speedo.c
+++ b/drivers/soc/tegra/fuse/speedo-tegra30.c
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
+ * Copyright (c) 2012-2014, 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,
@@ -14,18 +14,19 @@
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
-#include <linux/bug.h>
+#include <linux/device.h>
#include <linux/kernel.h>
+#include <linux/bug.h>
#include <linux/tegra-soc.h>
#include "fuse.h"
-#define CORE_PROCESS_CORNERS_NUM 1
-#define CPU_PROCESS_CORNERS_NUM 6
+#define CORE_PROCESS_CORNERS 1
+#define CPU_PROCESS_CORNERS 6
-#define FUSE_SPEEDO_CALIB_0 0x114
-#define FUSE_PACKAGE_INFO 0X1FC
-#define FUSE_TEST_PROG_VER 0X128
+#define FUSE_SPEEDO_CALIB_0 0x14
+#define FUSE_PACKAGE_INFO 0XFC
+#define FUSE_TEST_PROG_VER 0X28
#define G_SPEEDO_BIT_MINUS1 58
#define G_SPEEDO_BIT_MINUS1_R 59
@@ -52,7 +53,7 @@ enum {
THRESHOLD_INDEX_COUNT,
};
-static const u32 core_process_speedos[][CORE_PROCESS_CORNERS_NUM] = {
+static const u32 __initconst core_process_speedos[][CORE_PROCESS_CORNERS] = {
{180},
{170},
{195},
@@ -67,7 +68,7 @@ static const u32 core_process_speedos[][CORE_PROCESS_CORNERS_NUM] = {
{180},
};
-static const u32 cpu_process_speedos[][CPU_PROCESS_CORNERS_NUM] = {
+static const u32 __initconst cpu_process_speedos[][CPU_PROCESS_CORNERS] = {
{306, 338, 360, 376, UINT_MAX},
{295, 336, 358, 375, UINT_MAX},
{325, 325, 358, 375, UINT_MAX},
@@ -82,35 +83,34 @@ static const u32 cpu_process_speedos[][CPU_PROCESS_CORNERS_NUM] = {
{295, 336, 358, 375, 391, UINT_MAX},
};
-static int threshold_index;
-static int package_id;
+static int threshold_index __initdata;
-static void fuse_speedo_calib(u32 *speedo_g, u32 *speedo_lp)
+static void __init fuse_speedo_calib(u32 *speedo_g, u32 *speedo_lp)
{
u32 reg;
int ate_ver;
int bit_minus1;
int bit_minus2;
- reg = tegra_fuse_readl(FUSE_SPEEDO_CALIB_0);
+ reg = tegra30_fuse_readl(FUSE_SPEEDO_CALIB_0);
*speedo_lp = (reg & 0xFFFF) * 4;
*speedo_g = ((reg >> 16) & 0xFFFF) * 4;
- ate_ver = tegra_fuse_readl(FUSE_TEST_PROG_VER);
- pr_info("%s: ATE prog ver %d.%d\n", __func__, ate_ver/10, ate_ver%10);
+ ate_ver = tegra30_fuse_readl(FUSE_TEST_PROG_VER);
+ pr_debug("Tegra ATE prog ver %d.%d\n", ate_ver/10, ate_ver%10);
if (ate_ver >= 26) {
- bit_minus1 = tegra_spare_fuse(LP_SPEEDO_BIT_MINUS1);
- bit_minus1 |= tegra_spare_fuse(LP_SPEEDO_BIT_MINUS1_R);
- bit_minus2 = tegra_spare_fuse(LP_SPEEDO_BIT_MINUS2);
- bit_minus2 |= tegra_spare_fuse(LP_SPEEDO_BIT_MINUS2_R);
+ bit_minus1 = tegra30_spare_fuse(LP_SPEEDO_BIT_MINUS1);
+ bit_minus1 |= tegra30_spare_fuse(LP_SPEEDO_BIT_MINUS1_R);
+ bit_minus2 = tegra30_spare_fuse(LP_SPEEDO_BIT_MINUS2);
+ bit_minus2 |= tegra30_spare_fuse(LP_SPEEDO_BIT_MINUS2_R);
*speedo_lp |= (bit_minus1 << 1) | bit_minus2;
- bit_minus1 = tegra_spare_fuse(G_SPEEDO_BIT_MINUS1);
- bit_minus1 |= tegra_spare_fuse(G_SPEEDO_BIT_MINUS1_R);
- bit_minus2 = tegra_spare_fuse(G_SPEEDO_BIT_MINUS2);
- bit_minus2 |= tegra_spare_fuse(G_SPEEDO_BIT_MINUS2_R);
+ bit_minus1 = tegra30_spare_fuse(G_SPEEDO_BIT_MINUS1);
+ bit_minus1 |= tegra30_spare_fuse(G_SPEEDO_BIT_MINUS1_R);
+ bit_minus2 = tegra30_spare_fuse(G_SPEEDO_BIT_MINUS2);
+ bit_minus2 |= tegra30_spare_fuse(G_SPEEDO_BIT_MINUS2_R);
*speedo_g |= (bit_minus1 << 1) | bit_minus2;
} else {
*speedo_lp |= 0x3;
@@ -118,133 +118,131 @@ static void fuse_speedo_calib(u32 *speedo_g, u32 *speedo_lp)
}
}
-static void rev_sku_to_speedo_ids(int rev, int sku)
+static void __init rev_sku_to_speedo_ids(struct tegra_sku_info *sku_info)
{
- switch (rev) {
+ int package_id = tegra30_fuse_readl(FUSE_PACKAGE_INFO) & 0x0F;
+
+ switch (sku_info->revision) {
case TEGRA_REVISION_A01:
- tegra_cpu_speedo_id = 0;
- tegra_soc_speedo_id = 0;
+ sku_info->cpu_speedo_id = 0;
+ sku_info->soc_speedo_id = 0;
threshold_index = THRESHOLD_INDEX_0;
break;
case TEGRA_REVISION_A02:
case TEGRA_REVISION_A03:
- switch (sku) {
+ switch (sku_info->sku_id) {
case 0x87:
case 0x82:
- tegra_cpu_speedo_id = 1;
- tegra_soc_speedo_id = 1;
+ sku_info->cpu_speedo_id = 1;
+ sku_info->soc_speedo_id = 1;
threshold_index = THRESHOLD_INDEX_1;
break;
case 0x81:
switch (package_id) {
case 1:
- tegra_cpu_speedo_id = 2;
- tegra_soc_speedo_id = 2;
+ sku_info->cpu_speedo_id = 2;
+ sku_info->soc_speedo_id = 2;
threshold_index = THRESHOLD_INDEX_2;
break;
case 2:
- tegra_cpu_speedo_id = 4;
- tegra_soc_speedo_id = 1;
+ sku_info->cpu_speedo_id = 4;
+ sku_info->soc_speedo_id = 1;
threshold_index = THRESHOLD_INDEX_7;
break;
default:
- pr_err("Tegra30: Unknown pkg %d\n", package_id);
- BUG();
+ pr_err("Tegra Unknown pkg %d\n", package_id);
break;
}
break;
case 0x80:
switch (package_id) {
case 1:
- tegra_cpu_speedo_id = 5;
- tegra_soc_speedo_id = 2;
+ sku_info->cpu_speedo_id = 5;
+ sku_info->soc_speedo_id = 2;
threshold_index = THRESHOLD_INDEX_8;
break;
case 2:
- tegra_cpu_speedo_id = 6;
- tegra_soc_speedo_id = 2;
+ sku_info->cpu_speedo_id = 6;
+ sku_info->soc_speedo_id = 2;
threshold_index = THRESHOLD_INDEX_9;
break;
default:
- pr_err("Tegra30: Unknown pkg %d\n", package_id);
- BUG();
+ pr_err("Tegra Unknown pkg %d\n", package_id);
break;
}
break;
case 0x83:
switch (package_id) {
case 1:
- tegra_cpu_speedo_id = 7;
- tegra_soc_speedo_id = 1;
+ sku_info->cpu_speedo_id = 7;
+ sku_info->soc_speedo_id = 1;
threshold_index = THRESHOLD_INDEX_10;
break;
case 2:
- tegra_cpu_speedo_id = 3;
- tegra_soc_speedo_id = 2;
+ sku_info->cpu_speedo_id = 3;
+ sku_info->soc_speedo_id = 2;
threshold_index = THRESHOLD_INDEX_3;
break;
default:
- pr_err("Tegra30: Unknown pkg %d\n", package_id);
- BUG();
+ pr_err("Tegra Unknown pkg %d\n", package_id);
break;
}
break;
case 0x8F:
- tegra_cpu_speedo_id = 8;
- tegra_soc_speedo_id = 1;
+ sku_info->cpu_speedo_id = 8;
+ sku_info->soc_speedo_id = 1;
threshold_index = THRESHOLD_INDEX_11;
break;
case 0x08:
- tegra_cpu_speedo_id = 1;
- tegra_soc_speedo_id = 1;
+ sku_info->cpu_speedo_id = 1;
+ sku_info->soc_speedo_id = 1;
threshold_index = THRESHOLD_INDEX_4;
break;
case 0x02:
- tegra_cpu_speedo_id = 2;
- tegra_soc_speedo_id = 2;
+ sku_info->cpu_speedo_id = 2;
+ sku_info->soc_speedo_id = 2;
threshold_index = THRESHOLD_INDEX_5;
break;
case 0x04:
- tegra_cpu_speedo_id = 3;
- tegra_soc_speedo_id = 2;
+ sku_info->cpu_speedo_id = 3;
+ sku_info->soc_speedo_id = 2;
threshold_index = THRESHOLD_INDEX_6;
break;
case 0:
switch (package_id) {
case 1:
- tegra_cpu_speedo_id = 2;
- tegra_soc_speedo_id = 2;
+ sku_info->cpu_speedo_id = 2;
+ sku_info->soc_speedo_id = 2;
threshold_index = THRESHOLD_INDEX_2;
break;
case 2:
- tegra_cpu_speedo_id = 3;
- tegra_soc_speedo_id = 2;
+ sku_info->cpu_speedo_id = 3;
+ sku_info->soc_speedo_id = 2;
threshold_index = THRESHOLD_INDEX_3;
break;
default:
- pr_err("Tegra30: Unknown pkg %d\n", package_id);
- BUG();
+ pr_err("Tegra Unknown pkg %d\n", package_id);
break;
}
break;
default:
- pr_warn("Tegra30: Unknown SKU %d\n", sku);
- tegra_cpu_speedo_id = 0;
- tegra_soc_speedo_id = 0;
+ pr_warn("Tegra Unknown SKU %d\n", sku_info->sku_id);
+ sku_info->cpu_speedo_id = 0;
+ sku_info->soc_speedo_id = 0;
threshold_index = THRESHOLD_INDEX_0;
break;
}
break;
default:
- pr_warn("Tegra30: Unknown chip rev %d\n", rev);
- tegra_cpu_speedo_id = 0;
- tegra_soc_speedo_id = 0;
+ pr_warn("Tegra Unknown chip rev %d\n", sku_info->revision);
+ sku_info->cpu_speedo_id = 0;
+ sku_info->soc_speedo_id = 0;
threshold_index = THRESHOLD_INDEX_0;
break;
}
}
-void tegra30_init_speedo_data(void)
+void __init tegra30_init_speedo_data(struct tegra_sku_info *sku_info)
{
u32 cpu_speedo_val;
u32 core_speedo_val;
@@ -255,39 +253,35 @@ void tegra30_init_speedo_data(void)
BUILD_BUG_ON(ARRAY_SIZE(core_process_speedos) !=
THRESHOLD_INDEX_COUNT);
- package_id = tegra_fuse_readl(FUSE_PACKAGE_INFO) & 0x0F;
- rev_sku_to_speedo_ids(tegra_revision, tegra_sku_id);
+ rev_sku_to_speedo_ids(sku_info);
fuse_speedo_calib(&cpu_speedo_val, &core_speedo_val);
- pr_debug("%s CPU speedo value %u\n", __func__, cpu_speedo_val);
- pr_debug("%s Core speedo value %u\n", __func__, core_speedo_val);
+ pr_debug("Tegra CPU speedo value %u\n", cpu_speedo_val);
+ pr_debug("Tegra Core speedo value %u\n", core_speedo_val);
- for (i = 0; i < CPU_PROCESS_CORNERS_NUM; i++) {
+ for (i = 0; i < CPU_PROCESS_CORNERS; i++) {
if (cpu_speedo_val < cpu_process_speedos[threshold_index][i])
break;
}
- tegra_cpu_process_id = i - 1;
+ sku_info->cpu_process_id = i - 1;
- if (tegra_cpu_process_id == -1) {
- pr_warn("Tegra30: CPU speedo value %3d out of range",
- cpu_speedo_val);
- tegra_cpu_process_id = 0;
- tegra_cpu_speedo_id = 1;
+ if (sku_info->cpu_process_id == -1) {
+ pr_warn("Tegra CPU speedo value %3d out of range",
+ cpu_speedo_val);
+ sku_info->cpu_process_id = 0;
+ sku_info->cpu_speedo_id = 1;
}
- for (i = 0; i < CORE_PROCESS_CORNERS_NUM; i++) {
+ for (i = 0; i < CORE_PROCESS_CORNERS; i++) {
if (core_speedo_val < core_process_speedos[threshold_index][i])
break;
}
- tegra_core_process_id = i - 1;
+ sku_info->core_process_id = i - 1;
- if (tegra_core_process_id == -1) {
- pr_warn("Tegra30: CORE speedo value %3d out of range",
- core_speedo_val);
- tegra_core_process_id = 0;
- tegra_soc_speedo_id = 1;
+ if (sku_info->core_process_id == -1) {
+ pr_warn("Tegra CORE speedo value %3d out of range",
+ core_speedo_val);
+ sku_info->core_process_id = 0;
+ sku_info->soc_speedo_id = 1;
}
-
- pr_info("Tegra30: CPU Speedo ID %d, Soc Speedo ID %d",
- tegra_cpu_speedo_id, tegra_soc_speedo_id);
}
diff --git a/drivers/soc/tegra/fuse/tegra-apbmisc.c b/drivers/soc/tegra/fuse/tegra-apbmisc.c
new file mode 100644
index 000000000000..d51d8159a3f8
--- /dev/null
+++ b/drivers/soc/tegra/fuse/tegra-apbmisc.c
@@ -0,0 +1,111 @@
+/*
+ * 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 <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/io.h>
+#include <linux/tegra-soc.h>
+
+#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");
+}
diff --git a/include/linux/tegra-soc.h b/include/linux/tegra-soc.h
index 3a00b3419594..3d984219aaa1 100644
--- a/include/linux/tegra-soc.h
+++ b/include/linux/tegra-soc.h
@@ -22,6 +22,9 @@
#define TEGRA114 0x35
#define TEGRA124 0x40
+#define TEGRA_FUSE_SKU_CALIB_0 0xf0
+#define TEGRA30_FUSE_SATA_CALIB 0x124
+
#ifndef __ASSEMBLY__
u32 tegra_read_chipid(void);
@@ -37,11 +40,26 @@ enum tegra_revision {
TEGRA_REVISION_MAX,
};
+struct tegra_sku_info {
+ int sku_id;
+ int cpu_process_id;
+ int cpu_speedo_id;
+ int cpu_speedo_value;
+ int cpu_iddq_value;
+ int core_process_id;
+ int soc_speedo_id;
+ int gpu_speedo_id;
+ int gpu_process_id;
+ int gpu_speedo_value;
+ enum tegra_revision revision;
+};
+
u32 tegra_read_straps(void);
u32 tegra_read_chipid(void);
void tegra_init_fuse(void);
+int tegra_fuse_readl(unsigned long offset, u32 *value);
-extern enum tegra_revision tegra_revision;
+extern struct tegra_sku_info tegra_sku_info;
#if defined(CONFIG_TEGRA20_APB_DMA)
int tegra_apb_readl_using_dma(unsigned long offset, u32 *value);
--
2.0.1
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