samsung update 1

1 files changed, 190 insertions, 0 deletions

diff --git a/arch/arm/mach-exynos/asv-4x12.c b/arch/arm/mach-exynos/asv-4x12.c
new file mode 100644
index 0000000..5eeaf20
--- /dev/null
+++ b/arch/arm/mach-exynos/asv-4x12.c
@@ -0,0 +1,190 @@
+/* linux/arch/arm/mach-exynos/asv-4x12.c
+ *
+ * Copyright (c) 2011 Samsung Electronics Co., Ltd.
+ *		http://www.samsung.com/
+ *
+ * EXYNOS4X12 - ASV(Adaptive Supply Voltage) driver
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/err.h>
+#include <linux/clk.h>
+#include <linux/io.h>
+
+#include <mach/asv.h>
+#include <mach/map.h>
+#include <plat/cpu.h>
+
+/* ASV function for Fused Chip */
+#define IDS_ARM_OFFSET		24
+#define IDS_ARM_MASK		0xFF
+#define HPM_OFFSET		12
+#define HPM_MASK		0x1F
+
+#define FUSED_SG_OFFSET		3
+#define ORIG_SG_OFFSET		17
+#define ORIG_SG_MASK		0xF
+#define MOD_SG_OFFSET		21
+#define MOD_SG_MASK		0x7
+
+#define DEFAULT_ASV_GROUP	1
+
+#define CHIP_ID_REG		(S5P_VA_CHIPID + 0x4)
+
+struct asv_judge_table exynos4x12_limit[] = {
+	/* HPM, IDS */
+	{  0,   0},		/* Reserved Group */
+	{  0,   0},		/* Reserved Group */
+	{ 14,   9},
+	{ 16,  14},
+	{ 18,  17},
+	{ 20,  20},
+	{ 21,  24},
+	{ 22,  30},
+	{ 23,  34},
+	{ 24,  39},
+	{100, 100},
+	{999, 999},		/* Reserved Group */
+};
+
+struct asv_judge_table exynos4212_limit[] = {
+	/* HPM, IDS */
+	{  0,   0},		/* Reserved Group */
+	{ 17,  12},
+	{ 18,  13},
+	{ 20,  14},
+	{ 22,  18},
+	{ 24,  22},
+	{ 25,  29},
+	{ 26,  31},
+	{ 27,  35},
+	{ 28,  39},
+	{100, 100},
+	{999, 999},		/* Reserved Group */
+};
+
+static int exynos4x12_get_hpm(struct samsung_asv *asv_info)
+{
+	asv_info->hpm_result = (asv_info->pkg_id >> HPM_OFFSET) & HPM_MASK;
+
+	return 0;
+}
+
+static int exynos4x12_get_ids(struct samsung_asv *asv_info)
+{
+	asv_info->ids_result = (asv_info->pkg_id >> IDS_ARM_OFFSET) & IDS_ARM_MASK;
+
+	return 0;
+}
+
+static void exynos4x12_pre_set_abb(void)
+{
+	switch (exynos_result_of_asv) {
+	case 0:
+	case 1:
+	case 2:
+	case 3:
+		exynos4x12_set_abb(ABB_MODE_100V);
+		break;
+
+	default:
+		exynos4x12_set_abb(ABB_MODE_130V);
+		break;
+	}
+}
+
+static int exynos4x12_asv_store_result(struct samsung_asv *asv_info)
+{
+	unsigned int i;
+
+	if (soc_is_exynos4412()) {
+		for (i = 0; i < ARRAY_SIZE(exynos4x12_limit); i++) {
+			if ((asv_info->ids_result <= exynos4x12_limit[i].ids_limit) ||
+			    (asv_info->hpm_result <= exynos4x12_limit[i].hpm_limit)) {
+				exynos_result_of_asv = i;
+				break;
+			}
+		}
+	} else {
+		for (i = 0; i < ARRAY_SIZE(exynos4212_limit); i++) {
+			if ((asv_info->ids_result <= exynos4212_limit[i].ids_limit) ||
+			    (asv_info->hpm_result <= exynos4212_limit[i].hpm_limit)) {
+				exynos_result_of_asv = i;
+				break;
+			}
+		}
+
+	}
+
+	/*
+	 * If ASV result value is lower than default value
+	 * Fix with default value.
+	 */
+	if (exynos_result_of_asv < DEFAULT_ASV_GROUP)
+		exynos_result_of_asv = DEFAULT_ASV_GROUP;
+
+	pr_info("EXYNOS4X12(NO SG): IDS : %d HPM : %d RESULT : %d\n",
+		asv_info->ids_result, asv_info->hpm_result, exynos_result_of_asv);
+
+	exynos4x12_pre_set_abb();
+
+	return 0;
+}
+
+int exynos4x12_asv_init(struct samsung_asv *asv_info)
+{
+	unsigned int tmp;
+	unsigned int exynos_orig_sp;
+	unsigned int exynos_mod_sp;
+	int exynos_cal_asv;
+
+	exynos_result_of_asv = 0;
+
+	pr_info("EXYNOS4X12: Adaptive Support Voltage init\n");
+
+	tmp = __raw_readl(CHIP_ID_REG);
+
+	/* Store PKG_ID */
+	asv_info->pkg_id = tmp;
+
+	/* If Speed group is fused, get speed group from */
+	if ((tmp >> FUSED_SG_OFFSET) & 0x1) {
+		exynos_orig_sp = (tmp >> ORIG_SG_OFFSET) & ORIG_SG_MASK;
+		exynos_mod_sp = (tmp >> MOD_SG_OFFSET) & MOD_SG_MASK;
+
+		exynos_cal_asv = exynos_orig_sp - exynos_mod_sp;
+
+		/*
+		 * If There is no origin speed group,
+		 * store 1 asv group into exynos_result_of_asv.
+		 */
+		if (!exynos_orig_sp) {
+			pr_info("EXYNOS4X12: No Origin speed Group\n");
+			exynos_result_of_asv = DEFAULT_ASV_GROUP;
+		} else {
+			if (exynos_cal_asv < DEFAULT_ASV_GROUP)
+				exynos_result_of_asv = DEFAULT_ASV_GROUP;
+			else
+				exynos_result_of_asv = exynos_cal_asv;
+		}
+
+		pr_info("EXYNOS4X12(SG):  ORIG : %d MOD : %d RESULT : %d\n",
+			exynos_orig_sp, exynos_mod_sp, exynos_result_of_asv);
+
+		exynos4x12_pre_set_abb();
+
+		return -EEXIST;
+	}
+
+	asv_info->get_ids = exynos4x12_get_ids;
+	asv_info->get_hpm = exynos4x12_get_hpm;
+	asv_info->store_result = exynos4x12_asv_store_result;
+
+	return 0;
+}