[PATCH 2/2] ARM: tegra: T30 speedo-based identification
From: Danny Huang
Date: Mon Oct 29 2012 - 03:22:22 EST
This patch adds speedo-based identification support for T30.
Signed-off-by: Danny Huang <dahuang@xxxxxxxxxx>
---
arch/arm/mach-tegra/Makefile | 1 +
arch/arm/mach-tegra/fuse.c | 26 +++-
arch/arm/mach-tegra/fuse.h | 8 +
arch/arm/mach-tegra/tegra30_speedo.c | 290 +++++++++++++++++++++++++++++++++++
4 files changed, 319 insertions(+), 6 deletions(-)
create mode 100644 arch/arm/mach-tegra/tegra30_speedo.c
diff --git a/arch/arm/mach-tegra/Makefile b/arch/arm/mach-tegra/Makefile
index 7ab6092..fae982a 100644
--- a/arch/arm/mach-tegra/Makefile
+++ b/arch/arm/mach-tegra/Makefile
@@ -17,6 +17,7 @@ obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += tegra20_speedo.o
obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += sleep-t20.o
obj-$(CONFIG_ARCH_TEGRA_3x_SOC) += tegra30_clocks.o
obj-$(CONFIG_ARCH_TEGRA_3x_SOC) += tegra30_clocks_data.o
+obj-$(CONFIG_ARCH_TEGRA_3x_SOC) += tegra30_speedo.o
obj-$(CONFIG_ARCH_TEGRA_3x_SOC) += sleep-t30.o
obj-$(CONFIG_SMP) += platsmp.o headsmp.o
obj-$(CONFIG_SMP) += reset.o
diff --git a/arch/arm/mach-tegra/fuse.c b/arch/arm/mach-tegra/fuse.c
index b28e6d2..03e697a 100644
--- a/arch/arm/mach-tegra/fuse.c
+++ b/arch/arm/mach-tegra/fuse.c
@@ -29,12 +29,17 @@
#define FUSE_UID_LOW 0x108
#define FUSE_UID_HIGH 0x10c
#define FUSE_SKU_INFO 0x110
-#define FUSE_SPARE_BIT 0x200
+
+#define TEGRA20_FUSE_SPARE_BIT 0x200
+#define TEGRA30_FUSE_SPARE_BIT 0x244
+
+static int tegra_fuse_spare_bit;
int tegra_sku_id;
int tegra_cpu_process_id;
int tegra_core_process_id;
int tegra_chip_id;
+int tegra_cpu_speedo_id;
int tegra_soc_speedo_id;
enum tegra_revision tegra_revision;
@@ -58,14 +63,14 @@ static const char *tegra_revision_name[TEGRA_REVISION_MAX] = {
[TEGRA_REVISION_A04] = "A04",
};
-static inline u32 tegra_fuse_readl(unsigned long offset)
+u32 tegra_fuse_readl(unsigned long offset)
{
return tegra_apb_readl(TEGRA_FUSE_BASE + offset);
}
unsigned int tegra_spare_fuse(int bit)
{
- return tegra_fuse_readl(FUSE_SPARE_BIT + bit * 4);
+ return tegra_fuse_readl(tegra_fuse_spare_bit + bit * 4);
}
static enum tegra_revision tegra_get_revision(u32 id)
@@ -107,9 +112,18 @@ void tegra_init_fuse(void)
id = readl_relaxed(IO_ADDRESS(TEGRA_APB_MISC_BASE) + 0x804);
tegra_chip_id = (id >> 8) & 0xff;
- tegra_revision = tegra_get_revision(id);
-
- tegra20_init_speedo_data();
+ switch (tegra_chip_id) {
+ case TEGRA20:
+ tegra_fuse_spare_bit = TEGRA20_FUSE_SPARE_BIT;
+ tegra_revision = tegra_get_revision(id);
+ tegra20_init_speedo_data();
+ break;
+ case TEGRA30:
+ tegra_fuse_spare_bit = TEGRA30_FUSE_SPARE_BIT;
+ tegra_revision = tegra_get_revision(id);
+ tegra30_init_speedo_data();
+ break;
+ }
pr_info("Tegra Revision: %s SKU: %d CPU Process: %d Core Process: %d\n",
tegra_revision_name[tegra_revision],
diff --git a/arch/arm/mach-tegra/fuse.h b/arch/arm/mach-tegra/fuse.h
index f1cafb9..544769c 100644
--- a/arch/arm/mach-tegra/fuse.h
+++ b/arch/arm/mach-tegra/fuse.h
@@ -42,6 +42,7 @@ extern int tegra_sku_id;
extern int tegra_cpu_process_id;
extern int tegra_core_process_id;
extern int tegra_chip_id;
+extern int tegra_cpu_speedo_id;
extern int tegra_soc_speedo_id;
extern enum tegra_revision tegra_revision;
@@ -50,6 +51,7 @@ extern int tegra_bct_strapping;
unsigned long long tegra_chip_uid(void);
void tegra_init_fuse(void);
unsigned int tegra_spare_fuse(int bit);
+u32 tegra_fuse_readl(unsigned long offset);
#ifdef CONFIG_ARCH_TEGRA_2x_SOC
void tegra20_init_speedo_data(void);
@@ -57,4 +59,10 @@ void tegra20_init_speedo_data(void);
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
+
#endif
diff --git a/arch/arm/mach-tegra/tegra30_speedo.c b/arch/arm/mach-tegra/tegra30_speedo.c
new file mode 100644
index 0000000..d3f4885
--- /dev/null
+++ b/arch/arm/mach-tegra/tegra30_speedo.c
@@ -0,0 +1,290 @@
+/*
+ * Copyright (c) 2012, 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/bug.h>
+
+#include "fuse.h"
+
+#define CORE_PROCESS_CORNERS_NUM 1
+#define CPU_PROCESS_CORNERS_NUM 6
+
+#define FUSE_SPEEDO_CALIB_0 0x114
+#define FUSE_PACKAGE_INFO 0X1FC
+#define FUSE_TEST_PROG_VER 0X128
+
+#define G_SPEEDO_BIT_MINUS1 58
+#define G_SPEEDO_BIT_MINUS1_R 59
+#define G_SPEEDO_BIT_MINUS2 60
+#define G_SPEEDO_BIT_MINUS2_R 61
+#define LP_SPEEDO_BIT_MINUS1 62
+#define LP_SPEEDO_BIT_MINUS1_R 63
+#define LP_SPEEDO_BIT_MINUS2 64
+#define LP_SPEEDO_BIT_MINUS2_R 65
+
+static const u32 core_process_speedos[][CORE_PROCESS_CORNERS_NUM] = {
+ {180},
+ {170},
+ {195},
+ {180},
+ {168},
+ {192},
+ {180},
+ {170},
+ {195},
+ {180},
+ {180},
+ {180},
+};
+
+static const u32 cpu_process_speedos[][CPU_PROCESS_CORNERS_NUM] = {
+ {306, 338, 360, 376, UINT_MAX},
+ {295, 336, 358, 375, UINT_MAX},
+ {325, 325, 358, 375, UINT_MAX},
+ {325, 325, 358, 375, UINT_MAX},
+ {292, 324, 348, 364, UINT_MAX},
+ {324, 324, 348, 364, UINT_MAX},
+ {324, 324, 348, 364, UINT_MAX},
+ {295, 336, 358, 375, UINT_MAX},
+ {358, 358, 358, 358, 397, UINT_MAX},
+ {364, 364, 364, 364, 397, UINT_MAX},
+ {295, 336, 358, 375, 391, UINT_MAX},
+ {295, 336, 358, 375, 391, UINT_MAX},
+};
+
+static int threshold_index;
+static int package_id;
+
+static void fuse_speedo_calib(u32 *speedo_g, u32 *speedo_lp)
+{
+ u32 reg;
+ int ate_ver;
+ int bit_minus1;
+ int bit_minus2;
+
+ WARN_ON(!speedo_g || !speedo_lp);
+ reg = tegra_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);
+
+ if (ate_ver >= 26) {
+ bit_minus1 = tegra_spare_fuse(LP_SPEEDO_BIT_MINUS1) & 0x1;
+ bit_minus1 |= tegra_spare_fuse(LP_SPEEDO_BIT_MINUS1_R) & 0x1;
+ bit_minus2 = tegra_spare_fuse(LP_SPEEDO_BIT_MINUS2) & 0x1;
+ bit_minus2 |= tegra_spare_fuse(LP_SPEEDO_BIT_MINUS2_R) & 0x1;
+ *speedo_lp |= (bit_minus1 << 1) | bit_minus2;
+
+ bit_minus1 = tegra_spare_fuse(G_SPEEDO_BIT_MINUS1) & 0x1;
+ bit_minus1 |= tegra_spare_fuse(G_SPEEDO_BIT_MINUS1_R) & 0x1;
+ bit_minus2 = tegra_spare_fuse(G_SPEEDO_BIT_MINUS2) & 0x1;
+ bit_minus2 |= tegra_spare_fuse(G_SPEEDO_BIT_MINUS2_R) & 0x1;
+ *speedo_g |= (bit_minus1 << 1) | bit_minus2;
+ } else {
+ *speedo_lp |= 0x3;
+ *speedo_g |= 0x3;
+ }
+}
+
+static void rev_sku_to_speedo_ids(int rev, int sku)
+{
+ switch (rev) {
+ case TEGRA_REVISION_A01:
+ tegra_cpu_speedo_id = 0;
+ tegra_soc_speedo_id = 0;
+ threshold_index = 0;
+ break;
+ case TEGRA_REVISION_A02:
+ case TEGRA_REVISION_A03:
+ switch (sku) {
+ case 0x87:
+ case 0x82:
+ tegra_cpu_speedo_id = 1;
+ tegra_soc_speedo_id = 1;
+ threshold_index = 1;
+ break;
+ case 0x81:
+ switch (package_id) {
+ case 1:
+ tegra_cpu_speedo_id = 2;
+ tegra_soc_speedo_id = 2;
+ threshold_index = 2;
+ break;
+ case 2:
+ tegra_cpu_speedo_id = 4;
+ tegra_soc_speedo_id = 1;
+ threshold_index = 7;
+ break;
+ default:
+ pr_err("Tegra3 Rev-A02: Reserved pkg: %d\n",
+ package_id);
+ BUG();
+ break;
+ }
+ break;
+ case 0x80:
+ switch (package_id) {
+ case 1:
+ tegra_cpu_speedo_id = 5;
+ tegra_soc_speedo_id = 2;
+ threshold_index = 8;
+ break;
+ case 2:
+ tegra_cpu_speedo_id = 6;
+ tegra_soc_speedo_id = 2;
+ threshold_index = 9;
+ break;
+ default:
+ pr_err("Tegra3 Rev-A02: Reserved pkg: %d\n",
+ package_id);
+ BUG();
+ break;
+ }
+ break;
+ case 0x83:
+ switch (package_id) {
+ case 1:
+ tegra_cpu_speedo_id = 7;
+ tegra_soc_speedo_id = 1;
+ threshold_index = 10;
+ break;
+ case 2:
+ tegra_cpu_speedo_id = 3;
+ tegra_soc_speedo_id = 2;
+ threshold_index = 3;
+ break;
+ default:
+ pr_err("Tegra3 Rev-A02: Reserved pkg: %d\n",
+ package_id);
+ BUG();
+ break;
+ }
+ break;
+ case 0x8F:
+ tegra_cpu_speedo_id = 8;
+ tegra_soc_speedo_id = 1;
+ threshold_index = 11;
+ break;
+ case 0x08:
+ tegra_cpu_speedo_id = 1;
+ tegra_soc_speedo_id = 1;
+ threshold_index = 4;
+ break;
+ case 0x02:
+ tegra_cpu_speedo_id = 2;
+ tegra_soc_speedo_id = 2;
+ threshold_index = 5;
+ break;
+ case 0x04:
+ tegra_cpu_speedo_id = 3;
+ tegra_soc_speedo_id = 2;
+ threshold_index = 6;
+ break;
+ case 0:
+ pr_info("Tegra3 ENG SKU: Checking package_id\n");
+ switch (package_id) {
+ case 1:
+ tegra_cpu_speedo_id = 2;
+ tegra_soc_speedo_id = 2;
+ threshold_index = 2;
+ break;
+ case 2:
+ tegra_cpu_speedo_id = 3;
+ tegra_soc_speedo_id = 2;
+ threshold_index = 3;
+ break;
+ default:
+ pr_err("Tegra3 Rev-A02: Reserved pkg: %d\n",
+ package_id);
+ BUG();
+ break;
+ }
+ break;
+ default:
+ pr_err("Tegra3: Unknown SKU %d\n", sku);
+ tegra_cpu_speedo_id = 0;
+ tegra_soc_speedo_id = 0;
+ threshold_index = 0;
+ break;
+ }
+ break;
+ default:
+ BUG();
+ break;
+ }
+}
+
+void tegra30_init_speedo_data(void)
+{
+ u32 cpu_speedo_val;
+ u32 core_speedo_val;
+ int i;
+
+ package_id = tegra_fuse_readl(FUSE_PACKAGE_INFO) & 0x0F;
+
+ WARN_ON(ARRAY_SIZE(cpu_process_speedos) !=
+ ARRAY_SIZE(core_process_speedos));
+
+ rev_sku_to_speedo_ids(tegra_revision, tegra_sku_id);
+ WARN_ON(threshold_index >= ARRAY_SIZE(cpu_process_speedos));
+
+ 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);
+
+ for (i = 0; i < CPU_PROCESS_CORNERS_NUM; i++) {
+ if (cpu_speedo_val <
+ cpu_process_speedos[threshold_index][i]) {
+ break;
+ }
+ }
+ tegra_cpu_process_id = i - 1;
+
+ if (tegra_cpu_process_id == -1) {
+ pr_err("****************************************************");
+ pr_err("****************************************************");
+ pr_err("* tegra3_speedo: CPU speedo value %3d out of range *",
+ cpu_speedo_val);
+ pr_err("****************************************************");
+ pr_err("****************************************************");
+
+ tegra_cpu_speedo_id = 1;
+ }
+
+ for (i = 0; i < CORE_PROCESS_CORNERS_NUM; i++) {
+ if (core_speedo_val <
+ core_process_speedos[threshold_index][i]) {
+ break;
+ }
+ }
+ tegra_core_process_id = i - 1;
+
+ if (tegra_core_process_id == -1) {
+ pr_err("****************************************************");
+ pr_err("****************************************************");
+ pr_err("* tegra3_speedo: CORE speedo value %3d out of range *",
+ core_speedo_val);
+ pr_err("****************************************************");
+ pr_err("****************************************************");
+
+ tegra_soc_speedo_id = 1;
+ }
+ pr_info("Tegra3: CPU Speedo ID %d, Soc Speedo ID %d",
+ tegra_cpu_speedo_id, tegra_soc_speedo_id);
+}
--
1.8.0
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