diff options
Diffstat (limited to 'qemu/roms/u-boot/drivers/power/exynos-tmu.c')
| -rw-r--r-- | qemu/roms/u-boot/drivers/power/exynos-tmu.c | 346 |
1 files changed, 0 insertions, 346 deletions
diff --git a/qemu/roms/u-boot/drivers/power/exynos-tmu.c b/qemu/roms/u-boot/drivers/power/exynos-tmu.c deleted file mode 100644 index 9a093a5bd..000000000 --- a/qemu/roms/u-boot/drivers/power/exynos-tmu.c +++ /dev/null @@ -1,346 +0,0 @@ -/* - * Copyright (c) 2012 Samsung Electronics Co., Ltd. - * http://www.samsung.com - * Akshay Saraswat <akshay.s@samsung.com> - * - * EXYNOS - Thermal Management Unit - * - * See file CREDITS for list of people who contributed to this - * project. - * - * 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. - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, - * MA 02111-1307 USA - */ - -#include <common.h> -#include <errno.h> -#include <fdtdec.h> -#include <tmu.h> -#include <asm/arch/tmu.h> -#include <asm/arch/power.h> - -#define TRIMINFO_RELOAD 1 -#define CORE_EN 1 -#define THERM_TRIP_EN (1 << 12) - -#define INTEN_RISE0 1 -#define INTEN_RISE1 (1 << 4) -#define INTEN_RISE2 (1 << 8) -#define INTEN_FALL0 (1 << 16) -#define INTEN_FALL1 (1 << 20) -#define INTEN_FALL2 (1 << 24) - -#define TRIM_INFO_MASK 0xff - -#define INTCLEAR_RISE0 1 -#define INTCLEAR_RISE1 (1 << 4) -#define INTCLEAR_RISE2 (1 << 8) -#define INTCLEAR_FALL0 (1 << 16) -#define INTCLEAR_FALL1 (1 << 20) -#define INTCLEAR_FALL2 (1 << 24) -#define INTCLEARALL (INTCLEAR_RISE0 | INTCLEAR_RISE1 | \ - 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 min_val; - /* maximum value in temperature code range */ - unsigned max_val; - /* temperature threshold to start warning */ - unsigned start_warning; - /* temperature threshold CPU tripping */ - unsigned start_tripping; - /* temperature threshold for HW tripping */ - unsigned 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 efuse_min_value; - /* pre-defined efuse value for temperature calibration */ - unsigned efuse_value; - /* pre-defined efuse range maximum value */ - unsigned efuse_max_value; - /* current temperature sensing slope */ - unsigned slope; -}; - -/* TMU device specific details and status */ -struct tmu_info { - /* base Address for the TMU */ - struct exynos5_tmu_reg *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 te1; - /* value required for triminfo_85 calibration */ - unsigned te2; - /* Value for measured data calibration */ - 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; - -/* - * Get current temperature code from register, - * then calculate and calibrate it's value - * in degree celsius. - * - * @return current temperature of the chip as sensed by TMU - */ -static int get_cur_temp(struct tmu_info *info) -{ - struct exynos5_tmu_reg *reg = info->tmu_base; - ulong start; - int cur_temp = 0; - - /* - * Temperature code range between min 25 and max 125. - * May run more than once for first call as initial sensing - * has not yet happened. - */ - if (info->tmu_state == TMU_STATUS_NORMAL) { - start = get_timer(0); - do { - cur_temp = readl(®->current_temp) & 0xff; - } while ((cur_temp == 0) || (get_timer(start) > 100)); - } - - if (cur_temp == 0) - return cur_temp; - - /* Calibrate current temperature */ - cur_temp = cur_temp - info->te1 + info->dc_value; - - return cur_temp; -} - -/* - * Monitors status of the TMU device and exynos temperature - * - * @param 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) -{ - int cur_temp; - struct tmu_data *data = &gbl_info.data; - - if (gbl_info.tmu_state == TMU_STATUS_INIT) - return TMU_STATUS_INIT; - - /* Read current temperature of the SOC */ - cur_temp = get_cur_temp(&gbl_info); - - if (!cur_temp) - goto out; - - *temp = cur_temp; - - /* Temperature code lies between min 25 and max 125 */ - if ((cur_temp >= data->ts.start_tripping) && - (cur_temp <= data->ts.max_val)) - return TMU_STATUS_TRIPPED; - - if (cur_temp >= data->ts.start_warning) - return TMU_STATUS_WARNING; - - if ((cur_temp < data->ts.start_warning) && - (cur_temp >= data->ts.min_val)) - return TMU_STATUS_NORMAL; - - out: - /* Temperature code does not lie between min 25 and max 125 */ - gbl_info.tmu_state = TMU_STATUS_INIT; - debug("EXYNOS_TMU: Thermal reading failed\n"); - return TMU_STATUS_INIT; -} - -/* - * 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 - */ -static int get_tmu_fdt_values(struct tmu_info *info, const void *blob) -{ -#ifdef CONFIG_OF_CONTROL - fdt_addr_t addr; - 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. - */ - addr = fdtdec_get_addr(blob, node, "reg"); - if (addr == FDT_ADDR_T_NONE) { - debug("%s: Missing tmu-base\n", __func__); - return -1; - } - info->tmu_base = (struct exynos5_tmu_reg *)addr; - - /* Optional field. */ - info->tmu_mux = fdtdec_get_int(blob, - node, "samsung,mux", -1); - /* Take default value as per the user manual b(110) */ - if (info->tmu_mux == -1) - info->tmu_mux = 0x6; - - info->data.ts.min_val = fdtdec_get_int(blob, - node, "samsung,min-temp", -1); - error |= (info->data.ts.min_val == -1); - info->data.ts.max_val = fdtdec_get_int(blob, - node, "samsung,max-temp", -1); - error |= (info->data.ts.max_val == -1); - info->data.ts.start_warning = fdtdec_get_int(blob, - node, "samsung,start-warning", -1); - error |= (info->data.ts.start_warning == -1); - info->data.ts.start_tripping = fdtdec_get_int(blob, - node, "samsung,start-tripping", -1); - error |= (info->data.ts.start_tripping == -1); - info->data.ts.hardware_tripping = fdtdec_get_int(blob, - node, "samsung,hw-tripping", -1); - error |= (info->data.ts.hardware_tripping == -1); - info->data.efuse_min_value = fdtdec_get_int(blob, - node, "samsung,efuse-min-value", -1); - error |= (info->data.efuse_min_value == -1); - info->data.efuse_value = fdtdec_get_int(blob, - node, "samsung,efuse-value", -1); - error |= (info->data.efuse_value == -1); - info->data.efuse_max_value = fdtdec_get_int(blob, - node, "samsung,efuse-max-value", -1); - error |= (info->data.efuse_max_value == -1); - info->data.slope = fdtdec_get_int(blob, - node, "samsung,slope", -1); - error |= (info->data.slope == -1); - info->dc_value = fdtdec_get_int(blob, - node, "samsung,dc-value", -1); - error |= (info->dc_value == -1); - - if (error) { - debug("fail to get tmu node properties\n"); - return -1; - } -#else - /* Non DT support may never be added. Just in case */ - return -1; -#endif - - return 0; -} - -/* - * Calibrate and calculate threshold values and - * enable interrupt levels - * - * @param info pointer to the tmu_info struct - */ -static void tmu_setup_parameters(struct tmu_info *info) -{ - unsigned te_code, con; - unsigned warning_code, trip_code, hwtrip_code; - unsigned cooling_temp; - unsigned rising_value; - struct tmu_data *data = &info->data; - struct exynos5_tmu_reg *reg = info->tmu_base; - - /* Must reload for reading efuse value from triminfo register */ - writel(TRIMINFO_RELOAD, ®->triminfo_control); - - /* Get the compensation parameter */ - te_code = readl(®->triminfo); - info->te1 = te_code & TRIM_INFO_MASK; - info->te2 = ((te_code >> 8) & TRIM_INFO_MASK); - - if ((data->efuse_min_value > info->te1) || - (info->te1 > data->efuse_max_value) - || (info->te2 != 0)) - info->te1 = data->efuse_value; - - /* Get RISING & FALLING Threshold value */ - warning_code = data->ts.start_warning - + info->te1 - info->dc_value; - trip_code = data->ts.start_tripping - + info->te1 - info->dc_value; - hwtrip_code = data->ts.hardware_tripping - + info->te1 - info->dc_value; - - cooling_temp = 0; - - rising_value = ((warning_code << 8) | - (trip_code << 16) | - (hwtrip_code << 24)); - - /* Set interrupt level */ - writel(rising_value, ®->threshold_temp_rise); - writel(cooling_temp, ®->threshold_temp_fall); - - /* - * Init TMU control tuning parameters - * [28:24] VREF - Voltage reference - * [15:13] THERM_TRIP_MODE - Tripping mode - * [12] THERM_TRIP_EN - Thermal tripping enable - * [11:8] BUF_SLOPE_SEL - Gain of amplifier - * [6] THERM_TRIP_BY_TQ_EN - Tripping by TQ pin - */ - writel(data->slope, ®->tmu_control); - - writel(INTCLEARALL, ®->intclear); - - /* TMU core enable */ - con = readl(®->tmu_control); - con |= THERM_TRIP_EN | CORE_EN | (info->tmu_mux << 20); - - writel(con, ®->tmu_control); - - /* Enable HW thermal trip */ - set_hw_thermal_trip(); - - /* LEV1 LEV2 interrupt enable */ - writel(INTEN_RISE1 | INTEN_RISE2, ®->inten); -} - -/* - * Initialize TMU device - * - * @param blob FDT blob - * @return int value, 0 for success - */ -int tmu_init(const void *blob) -{ - gbl_info.tmu_state = TMU_STATUS_INIT; - if (get_tmu_fdt_values(&gbl_info, blob) < 0) - goto ret; - - tmu_setup_parameters(&gbl_info); - gbl_info.tmu_state = TMU_STATUS_NORMAL; -ret: - return gbl_info.tmu_state; -} |