diff options
Diffstat (limited to 'src/cpu/samsung/exynos5-common/exynos-tmu.c')
| -rw-r--r-- | src/cpu/samsung/exynos5-common/exynos-tmu.c | 167 |
1 files changed, 22 insertions, 145 deletions
diff --git a/src/cpu/samsung/exynos5-common/exynos-tmu.c b/src/cpu/samsung/exynos5-common/exynos-tmu.c index f908076a85..26777fca23 100644 --- a/src/cpu/samsung/exynos5-common/exynos-tmu.c +++ b/src/cpu/samsung/exynos5-common/exynos-tmu.c @@ -2,11 +2,12 @@ * Copyright (c) 2012 Samsung Electronics Co., Ltd. * http://www.samsung.com * Akshay Saraswat <Akshay.s@samsung.com> + * Copyright (c) 2013 Google Inc. * * EXYNOS - Thermal Management Unit * - * See file CREDITS for list of people who contributed to this - * project. + * This file was originally imported from Das U-Boot and then re-factored + * for coreboot. * * 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 @@ -17,11 +18,11 @@ * MA 02111-1307 USA */ -#include <common.h> -#include <errno.h> -#include <fdtdec.h> -#include <asm/arch/exynos-tmu.h> -#include <asm/arch/power.h> +#include <arch/io.h> +#include <cpu/samsung/exynos5-common/power.h> +#include <cpu/samsung/exynos5-common/exynos-tmu.h> + +#include <console/console.h> #define TRIMINFO_RELOAD 1 #define CORE_EN 1 @@ -46,55 +47,6 @@ INTCLEAR_RISE2 | INTCLEAR_FALL0 | \ INTCLEAR_FALL1 | INTCLEAR_FALL2) -/* Tmeperature threshold values for various thermal events */ -struct temperature_params { - /* minimum value in temperature code range */ - unsigned int min_val; - /* maximum value in temperature code range */ - unsigned int max_val; - /* temperature threshold to start warning */ - unsigned int start_warning; - /* temperature threshold CPU tripping */ - unsigned int start_tripping; - /* temperature threshold for HW tripping */ - unsigned int hardware_tripping; -}; - -/* Pre-defined values and thresholds for calibration of current temperature */ -struct tmu_data { - /* pre-defined temperature thresholds */ - struct temperature_params ts; - /* pre-defined efuse range minimum value */ - unsigned int efuse_min_value; - /* pre-defined efuse value for temperature calibration */ - unsigned int efuse_value; - /* pre-defined efuse range maximum value */ - unsigned int efuse_max_value; - /* current temperature sensing slope */ - unsigned int slope; -}; - -/* TMU device specific details and status */ -struct tmu_info { - /* base Address for the TMU */ - unsigned tmu_base; - /* mux Address for the TMU */ - int tmu_mux; - /* pre-defined values for calibration and thresholds */ - struct tmu_data data; - /* value required for triminfo_25 calibration */ - unsigned int te1; - /* value required for triminfo_85 calibration */ - unsigned int te2; - /* TMU DC value for threshold calculation */ - int dc_value; - /* enum value indicating status of the TMU */ - int tmu_state; -}; - -/* Global struct tmu_info variable to store init values */ -static struct tmu_info gbl_info; - /* * After reading temperature code from register, compensating * its value and calculating celsius temperatue, @@ -102,7 +54,7 @@ static struct tmu_info gbl_info; * * @return current temperature of the chip as sensed by TMU */ -int get_cur_temp(struct tmu_info *info) +static int get_cur_temp(struct tmu_info *info) { int cur_temp; struct tmu_reg *reg = (struct tmu_reg *)info->tmu_base; @@ -120,19 +72,20 @@ int get_cur_temp(struct tmu_info *info) /* * Monitors status of the TMU device and exynos temperature * - * @param temp pointer to the current temperature value + * @info TMU info + * @temp pointer to the current temperature value * @return enum tmu_status_t value, code indicating event to execute */ -enum tmu_status_t tmu_monitor(int *temp) +enum tmu_status_t tmu_monitor(struct tmu_info *info, int *temp) { - if (gbl_info.tmu_state == TMU_STATUS_INIT) + if (info->tmu_state == TMU_STATUS_INIT) return -1; int cur_temp; - struct tmu_data *data = &gbl_info.data; + struct tmu_data *data = &info->data; /* Read current temperature of the SOC */ - cur_temp = get_cur_temp(&gbl_info); + cur_temp = get_cur_temp(info); *temp = cur_temp; /* Temperature code lies between min 25 and max 125 */ @@ -146,93 +99,20 @@ enum tmu_status_t tmu_monitor(int *temp) return TMU_STATUS_NORMAL; /* Temperature code does not lie between min 25 and max 125 */ else { - gbl_info.tmu_state = TMU_STATUS_INIT; - debug("EXYNOS_TMU: Thermal reading failed\n"); + info->tmu_state = TMU_STATUS_INIT; + printk(BIOS_DEBUG, "EXYNOS_TMU: Thermal reading failed\n"); return -1; } return 0; } /* - * Get TMU specific pre-defined values from FDT - * - * @param info pointer to the tmu_info struct - * @param blob FDT blob - * @return int value, 0 for success - */ -int get_tmu_fdt_values(struct tmu_info *info, const void *blob) -{ - int node; - int error = 0; - - /* Get the node from FDT for TMU */ - node = fdtdec_next_compatible(blob, 0, - COMPAT_SAMSUNG_EXYNOS_TMU); - if (node < 0) { - debug("EXYNOS_TMU: No node for tmu in device tree\n"); - return -1; - } - - /* - * Get the pre-defined TMU specific values from FDT. - * All of these are expected to be correct otherwise - * miscalculation of register values in tmu_setup_parameters - * may result in misleading current temperature. - */ - info->tmu_base = fdtdec_get_addr(blob, node, "reg"); - if (info->tmu_base == FDT_ADDR_T_NONE) { - debug("%s: Missing tmu-base\n", __func__); - return -1; - } - info->tmu_mux = fdtdec_get_int(blob, - node, "samsung,mux", -1); - error |= info->tmu_mux; - info->data.ts.min_val = fdtdec_get_int(blob, - node, "samsung,min-temp", -1); - error |= info->data.ts.min_val; - info->data.ts.max_val = fdtdec_get_int(blob, - node, "samsung,max-temp", -1); - error |= info->data.ts.max_val; - info->data.ts.start_warning = fdtdec_get_int(blob, - node, "samsung,start-warning", -1); - error |= info->data.ts.start_warning; - info->data.ts.start_tripping = fdtdec_get_int(blob, - node, "samsung,start-tripping", -1); - error |= info->data.ts.start_tripping; - info->data.ts.hardware_tripping = fdtdec_get_int(blob, - node, "samsung,hw-tripping", -1); - error |= info->data.ts.hardware_tripping; - info->data.efuse_min_value = fdtdec_get_int(blob, - node, "samsung,efuse-min-value", -1); - error |= info->data.efuse_min_value; - info->data.efuse_value = fdtdec_get_int(blob, - node, "samsung,efuse-value", -1); - error |= info->data.efuse_value; - info->data.efuse_max_value = fdtdec_get_int(blob, - node, "samsung,efuse-max-value", -1); - error |= info->data.efuse_max_value; - info->data.slope = fdtdec_get_int(blob, - node, "samsung,slope", -1); - error |= info->data.slope; - info->dc_value = fdtdec_get_int(blob, - node, "samsung,dc-value", -1); - error |= info->dc_value; - - if (error == -1) { - debug("fail to get tmu node properties\n"); - return -1; - } - - return 0; -} - -/* * Calibrate and calculate threshold values and * enable interrupt levels * * @param info pointer to the tmu_info struct */ -void tmu_setup_parameters(struct tmu_info *info) +static void tmu_setup_parameters(struct tmu_info *info) { unsigned int te_temp, con; unsigned int warning_code, trip_code, hwtrip_code; @@ -302,17 +182,14 @@ void tmu_setup_parameters(struct tmu_info *info) /* * Initialize TMU device * - * @param blob FDT blob * @return int value, 0 for success */ -int tmu_init(const void *blob) +int tmu_init(struct tmu_info *info) { - gbl_info.tmu_state = TMU_STATUS_INIT; - if (get_tmu_fdt_values(&gbl_info, blob) < 0) - return -1; + info->tmu_state = TMU_STATUS_INIT; - tmu_setup_parameters(&gbl_info); - gbl_info.tmu_state = TMU_STATUS_NORMAL; + tmu_setup_parameters(info); + info->tmu_state = TMU_STATUS_NORMAL; return 0; } |