This patch series adds speedo identification functionality for tegra
T20 and T30. It reads speedo value from fuse and chooses CPU and core
process ID by checking speedo corner tables.
V2:
* Split spare fuse related changes to a separate patch
* Keep original fuse init flow on an unknown chip
* Change size check of speedo cornor table
* Set speedo id to 0 with unknown chip revision/SKU
* Set process id to 0 when speedo value out of range
Danny Huang (3):
ARM: tegra: flexible spare fuse read function
ARM: tegra: Add speedo-based process identification
ARM: tegra: T30 speedo-based process identification
arch/arm/mach-tegra/Makefile | 2 +
arch/arm/mach-tegra/fuse.c | 49 ++++--
arch/arm/mach-tegra/fuse.h | 16 ++
arch/arm/mach-tegra/tegra20_speedo.c | 109 +++++++++++++
arch/arm/mach-tegra/tegra30_speedo.c | 292 +++++++++++++++++++++++++++++++++++
5 files changed, 457 insertions(+), 11 deletions(-)
create mode 100644 arch/arm/mach-tegra/tegra20_speedo.c
create mode 100644 arch/arm/mach-tegra/tegra30_speedo.c
--
1.8.0
Detect CPU and core process ID by checking speedo corner tables.
This can provide a more accurate process ID.
Signed-off-by: Danny Huang <[email protected]>
---
arch/arm/mach-tegra/Makefile | 1 +
arch/arm/mach-tegra/fuse.c | 31 +++++++---
arch/arm/mach-tegra/fuse.h | 7 +++
arch/arm/mach-tegra/tegra20_speedo.c | 109 +++++++++++++++++++++++++++++++++++
4 files changed, 140 insertions(+), 8 deletions(-)
create mode 100644 arch/arm/mach-tegra/tegra20_speedo.c
diff --git a/arch/arm/mach-tegra/Makefile b/arch/arm/mach-tegra/Makefile
index 6f224f7..75418f1 100644
--- a/arch/arm/mach-tegra/Makefile
+++ b/arch/arm/mach-tegra/Makefile
@@ -13,6 +13,7 @@ obj-$(CONFIG_CPU_IDLE) += cpuidle.o
obj-$(CONFIG_CPU_IDLE) += sleep.o
obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += tegra20_clocks.o
obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += tegra20_clocks_data.o
+obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += tegra20_speedo.o
obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += tegra2_emc.o
obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += sleep-tegra20.o
ifeq ($(CONFIG_CPU_IDLE),y)
diff --git a/arch/arm/mach-tegra/fuse.c b/arch/arm/mach-tegra/fuse.c
index bd19c2f..9fd02c5 100644
--- a/arch/arm/mach-tegra/fuse.c
+++ b/arch/arm/mach-tegra/fuse.c
@@ -35,9 +35,11 @@ int tegra_sku_id;
int tegra_cpu_process_id;
int tegra_core_process_id;
int tegra_chip_id;
+int tegra_soc_speedo_id;
enum tegra_revision tegra_revision;
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.
@@ -91,6 +93,16 @@ static enum tegra_revision tegra_get_revision(u32 id)
}
}
+static void tegra_get_process_id(void)
+{
+ u32 reg;
+
+ 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;
+}
+
void tegra_init_fuse(void)
{
u32 id;
@@ -102,21 +114,24 @@ void tegra_init_fuse(void)
reg = tegra_fuse_readl(FUSE_SKU_INFO);
tegra_sku_id = reg & 0xFF;
- tegra_fuse_spare_bit = TEGRA20_FUSE_SPARE_BIT;
-
- 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;
-
reg = tegra_apb_readl(TEGRA_APB_MISC_BASE + STRAP_OPT);
tegra_bct_strapping = (reg & RAM_ID_MASK) >> RAM_CODE_SHIFT;
id = readl_relaxed(IO_ADDRESS(TEGRA_APB_MISC_BASE) + 0x804);
tegra_chip_id = (id >> 8) & 0xff;
+ tegra_fuse_spare_bit = TEGRA20_FUSE_SPARE_BIT;
+
+ switch (tegra_chip_id) {
+ case TEGRA20:
+ tegra_init_speedo_data = &tegra20_init_speedo_data;
+ break;
+ default:
+ tegra_init_speedo_data = &tegra_get_process_id;
+ }
+
tegra_revision = tegra_get_revision(id);
+ tegra_init_speedo_data();
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 aef1223..7347c88 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_soc_speedo_id;
extern enum tegra_revision tegra_revision;
extern int tegra_bct_strapping;
@@ -51,4 +52,10 @@ void tegra_init_fuse(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
+
#endif
diff --git a/arch/arm/mach-tegra/tegra20_speedo.c b/arch/arm/mach-tegra/tegra20_speedo.c
new file mode 100644
index 0000000..97feba3
--- /dev/null
+++ b/arch/arm/mach-tegra/tegra20_speedo.c
@@ -0,0 +1,109 @@
+/*
+ * 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 CPU_SPEEDO_LSBIT 20
+#define CPU_SPEEDO_MSBIT 29
+#define CPU_SPEEDO_REDUND_LSBIT 30
+#define CPU_SPEEDO_REDUND_MSBIT 39
+#define CPU_SPEEDO_REDUND_OFFS (CPU_SPEEDO_REDUND_MSBIT - CPU_SPEEDO_MSBIT)
+
+#define CORE_SPEEDO_LSBIT 40
+#define CORE_SPEEDO_MSBIT 47
+#define CORE_SPEEDO_REDUND_LSBIT 48
+#define CORE_SPEEDO_REDUND_MSBIT 55
+#define CORE_SPEEDO_REDUND_OFFS (CORE_SPEEDO_REDUND_MSBIT - CORE_SPEEDO_MSBIT)
+
+#define SPEEDO_MULT 4
+
+#define PROCESS_CORNERS_NUM 4
+
+#define SPEEDO_ID_SELECT_0(rev) ((rev) <= 2)
+#define SPEEDO_ID_SELECT_1(sku) \
+ (((sku) != 20) && ((sku) != 23) && ((sku) != 24) && \
+ ((sku) != 27) && ((sku) != 28))
+
+enum {
+ SPEEDO_ID_0,
+ SPEEDO_ID_1,
+ SPEEDO_ID_2,
+ SPEEDO_ID_COUNT,
+};
+
+static const u32 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] = {
+ {165, 195, 224, UINT_MAX},
+ {165, 195, 224, UINT_MAX},
+ {165, 195, 224, UINT_MAX},
+};
+
+void tegra20_init_speedo_data(void)
+{
+ u32 reg;
+ u32 val;
+ int i;
+
+ 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;
+ else
+ tegra_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);
+ val = (val << 1) | (reg & 0x1);
+ }
+ val = val * SPEEDO_MULT;
+ pr_debug("%s CPU speedo value %u\n", __func__, val);
+
+ for (i = 0; i < (PROCESS_CORNERS_NUM - 1); i++) {
+ if (val <= cpu_process_speedos[tegra_soc_speedo_id][i])
+ break;
+ }
+ tegra_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);
+ val = (val << 1) | (reg & 0x1);
+ }
+ val = val * SPEEDO_MULT;
+ pr_debug("%s Core speedo value %u\n", __func__, val);
+
+ for (i = 0; i < (PROCESS_CORNERS_NUM - 1); i++) {
+ if (val <= core_process_speedos[tegra_soc_speedo_id][i])
+ break;
+ }
+ tegra_core_process_id = i;
+
+ pr_info("Tegra2 Soc Speedo ID %d", tegra_soc_speedo_id);
+}
--
1.8.0
This patch adds speedo-based process identification support for T30.
Signed-off-by: Danny Huang <[email protected]>
---
arch/arm/mach-tegra/Makefile | 1 +
arch/arm/mach-tegra/fuse.c | 11 +-
arch/arm/mach-tegra/fuse.h | 7 +
arch/arm/mach-tegra/tegra30_speedo.c | 292 +++++++++++++++++++++++++++++++++++
4 files changed, 309 insertions(+), 2 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 75418f1..0979e8b 100644
--- a/arch/arm/mach-tegra/Makefile
+++ b/arch/arm/mach-tegra/Makefile
@@ -21,6 +21,7 @@ obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += cpuidle-tegra20.o
endif
obj-$(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-$(CONFIG_ARCH_TEGRA_3x_SOC) += sleep-tegra30.o
ifeq ($(CONFIG_CPU_IDLE),y)
obj-$(CONFIG_ARCH_TEGRA_3x_SOC) += cpuidle-tegra30.o
diff --git a/arch/arm/mach-tegra/fuse.c b/arch/arm/mach-tegra/fuse.c
index 9fd02c5..8121742 100644
--- a/arch/arm/mach-tegra/fuse.c
+++ b/arch/arm/mach-tegra/fuse.c
@@ -30,11 +30,13 @@
#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_chip_id;
+int tegra_cpu_speedo_id; /* only exist in Tegra30 and later */
int tegra_soc_speedo_id;
enum tegra_revision tegra_revision;
@@ -120,13 +122,18 @@ void tegra_init_fuse(void)
id = readl_relaxed(IO_ADDRESS(TEGRA_APB_MISC_BASE) + 0x804);
tegra_chip_id = (id >> 8) & 0xff;
- tegra_fuse_spare_bit = TEGRA20_FUSE_SPARE_BIT;
-
switch (tegra_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;
default:
+ pr_warn("Tegra: unknown chip id %d\n", tegra_chip_id);
+ tegra_fuse_spare_bit = TEGRA20_FUSE_SPARE_BIT;
tegra_init_speedo_data = &tegra_get_process_id;
}
diff --git a/arch/arm/mach-tegra/fuse.h b/arch/arm/mach-tegra/fuse.h
index 7347c88..ff1383d 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; /* only exist in Tegra30 and later */
extern int tegra_soc_speedo_id;
extern enum tegra_revision tegra_revision;
@@ -58,4 +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..9dc76ad
--- /dev/null
+++ b/arch/arm/mach-tegra/tegra30_speedo.c
@@ -0,0 +1,292 @@
+/*
+ * 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
+
+enum {
+ THRESHOLD_INDEX_0,
+ THRESHOLD_INDEX_1,
+ THRESHOLD_INDEX_2,
+ THRESHOLD_INDEX_3,
+ THRESHOLD_INDEX_4,
+ THRESHOLD_INDEX_5,
+ THRESHOLD_INDEX_6,
+ THRESHOLD_INDEX_7,
+ THRESHOLD_INDEX_8,
+ THRESHOLD_INDEX_9,
+ THRESHOLD_INDEX_10,
+ THRESHOLD_INDEX_11,
+ THRESHOLD_INDEX_COUNT,
+};
+
+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;
+
+ 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);
+ 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);
+ *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);
+ *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 = 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 = THRESHOLD_INDEX_1;
+ break;
+ case 0x81:
+ switch (package_id) {
+ case 1:
+ tegra_cpu_speedo_id = 2;
+ tegra_soc_speedo_id = 2;
+ threshold_index = THRESHOLD_INDEX_2;
+ break;
+ case 2:
+ tegra_cpu_speedo_id = 4;
+ tegra_soc_speedo_id = 1;
+ threshold_index = THRESHOLD_INDEX_7;
+ break;
+ default:
+ pr_err("Tegra3: Unknown 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 = THRESHOLD_INDEX_8;
+ break;
+ case 2:
+ tegra_cpu_speedo_id = 6;
+ tegra_soc_speedo_id = 2;
+ threshold_index = THRESHOLD_INDEX_9;
+ break;
+ default:
+ pr_err("Tegra3: Unknown 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 = THRESHOLD_INDEX_10;
+ break;
+ case 2:
+ tegra_cpu_speedo_id = 3;
+ tegra_soc_speedo_id = 2;
+ threshold_index = THRESHOLD_INDEX_3;
+ break;
+ default:
+ pr_err("Tegra3: Unknown pkg %d\n", package_id);
+ BUG();
+ break;
+ }
+ break;
+ case 0x8F:
+ tegra_cpu_speedo_id = 8;
+ tegra_soc_speedo_id = 1;
+ threshold_index = THRESHOLD_INDEX_11;
+ break;
+ case 0x08:
+ tegra_cpu_speedo_id = 1;
+ tegra_soc_speedo_id = 1;
+ threshold_index = THRESHOLD_INDEX_4;
+ break;
+ case 0x02:
+ tegra_cpu_speedo_id = 2;
+ tegra_soc_speedo_id = 2;
+ threshold_index = THRESHOLD_INDEX_5;
+ break;
+ case 0x04:
+ tegra_cpu_speedo_id = 3;
+ tegra_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;
+ threshold_index = THRESHOLD_INDEX_2;
+ break;
+ case 2:
+ tegra_cpu_speedo_id = 3;
+ tegra_soc_speedo_id = 2;
+ threshold_index = THRESHOLD_INDEX_3;
+ break;
+ default:
+ pr_err("Tegra3: Unknown pkg %d\n", package_id);
+ BUG();
+ break;
+ }
+ break;
+ default:
+ pr_warn("Tegra3: Unknown SKU %d\n", sku);
+ tegra_cpu_speedo_id = 0;
+ tegra_soc_speedo_id = 0;
+ threshold_index = THRESHOLD_INDEX_0;
+ break;
+ }
+ break;
+ default:
+ pr_warn("Tegra3: Unknown chip rev %d\n", rev);
+ tegra_cpu_speedo_id = 0;
+ tegra_soc_speedo_id = 0;
+ threshold_index = THRESHOLD_INDEX_0;
+ break;
+ }
+}
+
+void tegra30_init_speedo_data(void)
+{
+ u32 cpu_speedo_val;
+ u32 core_speedo_val;
+ int i;
+
+ BUILD_BUG_ON(ARRAY_SIZE(cpu_process_speedos) !=
+ THRESHOLD_INDEX_COUNT);
+ 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);
+ 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_warn("Tegra3: CPU speedo value %3d out of range",
+ cpu_speedo_val);
+ tegra_cpu_process_id = 0;
+ 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_warn("Tegra3: CORE speedo value %3d out of range",
+ core_speedo_val);
+ tegra_core_process_id = 0;
+ 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
Change the spare fuse base from a definition to a variable.
It provides flexibilty to read spare fuse on different chip.
Signed-off-by: Danny Huang <[email protected]>
---
arch/arm/mach-tegra/fuse.c | 19 ++++++++++++-------
arch/arm/mach-tegra/fuse.h | 2 ++
2 files changed, 14 insertions(+), 7 deletions(-)
diff --git a/arch/arm/mach-tegra/fuse.c b/arch/arm/mach-tegra/fuse.c
index 6c752e8..bd19c2f 100644
--- a/arch/arm/mach-tegra/fuse.c
+++ b/arch/arm/mach-tegra/fuse.c
@@ -28,7 +28,8 @@
#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
int tegra_sku_id;
int tegra_cpu_process_id;
@@ -36,6 +37,8 @@ int tegra_core_process_id;
int tegra_chip_id;
enum tegra_revision tegra_revision;
+static int tegra_fuse_spare_bit;
+
/* 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.
*/
@@ -56,14 +59,14 @@ 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);
}
-static inline bool get_spare_fuse(int bit)
+bool 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)
@@ -77,7 +80,7 @@ static enum tegra_revision tegra_get_revision(u32 id)
return TEGRA_REVISION_A02;
case 3:
if (tegra_chip_id == TEGRA20 &&
- (get_spare_fuse(18) || get_spare_fuse(19)))
+ (tegra_spare_fuse(18) || tegra_spare_fuse(19)))
return TEGRA_REVISION_A03p;
else
return TEGRA_REVISION_A03;
@@ -99,10 +102,12 @@ void tegra_init_fuse(void)
reg = tegra_fuse_readl(FUSE_SKU_INFO);
tegra_sku_id = reg & 0xFF;
- reg = tegra_fuse_readl(FUSE_SPARE_BIT);
+ tegra_fuse_spare_bit = TEGRA20_FUSE_SPARE_BIT;
+
+ reg = tegra_fuse_readl(tegra_fuse_spare_bit);
tegra_cpu_process_id = (reg >> 6) & 3;
- reg = tegra_fuse_readl(FUSE_SPARE_BIT);
+ reg = tegra_fuse_readl(tegra_fuse_spare_bit);
tegra_core_process_id = (reg >> 12) & 3;
reg = tegra_apb_readl(TEGRA_APB_MISC_BASE + STRAP_OPT);
diff --git a/arch/arm/mach-tegra/fuse.h b/arch/arm/mach-tegra/fuse.h
index d2107b2..aef1223 100644
--- a/arch/arm/mach-tegra/fuse.h
+++ b/arch/arm/mach-tegra/fuse.h
@@ -48,5 +48,7 @@ extern int tegra_bct_strapping;
unsigned long long tegra_chip_uid(void);
void tegra_init_fuse(void);
+bool tegra_spare_fuse(int bit);
+u32 tegra_fuse_readl(unsigned long offset);
#endif
--
1.8.0
On 11/15/2012 12:42 AM, Danny Huang wrote:
> This patch series adds speedo identification functionality for tegra
> T20 and T30. It reads speedo value from fuse and chooses CPU and core
> process ID by checking speedo corner tables.
I think this all looks fine; I assume there will be some forthcoming
usage of the new variables.
I applied the series with some very minor changes to the printfs and
commit description to that "Tegra20" was consistently used instead of
"T20" or "Tegra2", and the same for Tegra30.