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Commit 7495b2eb authored by Danny Huang's avatar Danny Huang Committed by Stephen Warren
Browse files

ARM: tegra: add speedo-based process id for Tegra114 



Add speedo-based process identification for Tegra114.

Based on the work by: Alex Frid <afrid@nvidia.com>

Signed-off-by: default avatarDanny Huang <dahuang@nvidia.com>
[swarren: added include of bug.h]
Signed-off-by: default avatarStephen Warren <swarren@nvidia.com>
parent d591fdf8

arch/arm/mach-tegra/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -28,6 +28,7 @@ obj-$(CONFIG_HOTPLUG_CPU) += hotplug.o 
obj-$(CONFIG_CPU_FREQ)                  += cpu-tegra.o

obj-$(CONFIG_TEGRA_PCI)			+= pcie.o



obj-$(CONFIG_ARCH_TEGRA_114_SOC)	+= tegra114_speedo.o

ifeq ($(CONFIG_CPU_IDLE),y)

obj-$(CONFIG_ARCH_TEGRA_114_SOC)	+= cpuidle-tegra114.o

endif

arch/arm/mach-tegra/fuse.c

+4 −0
Original line number Diff line number Diff line
@@ -2,6 +2,7 @@ 
 * arch/arm/mach-tegra/fuse.c

 *

 * Copyright (C) 2010 Google, Inc.

 * Copyright (c) 2013, NVIDIA CORPORATION.  All rights reserved.

 *

 * Author:

 *	Colin Cross <ccross@android.com>
@@ -137,6 +138,9 @@ void tegra_init_fuse(void) 
		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", tegra_chip_id);

		tegra_fuse_spare_bit = TEGRA20_FUSE_SPARE_BIT;

arch/arm/mach-tegra/fuse.h

+7 −0
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2010 Google, Inc.

 * Copyright (c) 2013, NVIDIA CORPORATION.  All rights reserved.

 *

 * Author:

 *	Colin Cross <ccross@android.com>
@@ -66,4 +67,10 @@ void tegra30_init_speedo_data(void); 
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

arch/arm/mach-tegra/tegra114_speedo.c

0 → 100644
+104 −0
Original line number Diff line number Diff line 
/*

 * Copyright (c) 2013, 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	2

#define CPU_PROCESS_CORNERS_NUM		2



enum {

	THRESHOLD_INDEX_0,

	THRESHOLD_INDEX_1,

	THRESHOLD_INDEX_COUNT,

};



static const u32 core_process_speedos[][CORE_PROCESS_CORNERS_NUM] = {

	{1123,     UINT_MAX},

	{0,        UINT_MAX},

};



static const u32 cpu_process_speedos[][CPU_PROCESS_CORNERS_NUM] = {

	{1695,     UINT_MAX},

	{0,        UINT_MAX},

};



static void rev_sku_to_speedo_ids(int rev, int sku, int *threshold)

{

	u32 tmp;



	switch (sku) {

	case 0x00:

	case 0x10:

	case 0x05:

	case 0x06:

		tegra_cpu_speedo_id = 1;

		tegra_soc_speedo_id = 0;

		*threshold = THRESHOLD_INDEX_0;

		break;



	case 0x03:

	case 0x04:

		tegra_cpu_speedo_id = 2;

		tegra_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;

		*threshold = THRESHOLD_INDEX_0;

		break;

	}



	if (rev == TEGRA_REVISION_A01) {

		tmp = tegra_fuse_readl(0x270) << 1;

		tmp |= tegra_fuse_readl(0x26c);

		if (!tmp)

			tegra_cpu_speedo_id = 0;

	}

}



void tegra114_init_speedo_data(void)

{

	u32 cpu_speedo_val;

	u32 core_speedo_val;

	int threshold;

	int i;



	BUILD_BUG_ON(ARRAY_SIZE(cpu_process_speedos) !=

			THRESHOLD_INDEX_COUNT);

	BUILD_BUG_ON(ARRAY_SIZE(core_process_speedos) !=

			THRESHOLD_INDEX_COUNT);



	rev_sku_to_speedo_ids(tegra_revision, tegra_sku_id, &threshold);



	cpu_speedo_val = tegra_fuse_readl(0x12c) + 1024;

	core_speedo_val = tegra_fuse_readl(0x134);



	for (i = 0; i < CPU_PROCESS_CORNERS_NUM; i++)

		if (cpu_speedo_val < cpu_process_speedos[threshold][i])

			break;

	tegra_cpu_process_id = i;



	for (i = 0; i < CORE_PROCESS_CORNERS_NUM; i++)

		if (core_speedo_val < core_process_speedos[threshold][i])

			break;

	tegra_core_process_id = i;

}