diff options
Diffstat (limited to 'drivers/thermal/tegra_soctherm.c')
| -rw-r--r-- | drivers/thermal/tegra_soctherm.c | 476 |
1 files changed, 0 insertions, 476 deletions
diff --git a/drivers/thermal/tegra_soctherm.c b/drivers/thermal/tegra_soctherm.c deleted file mode 100644 index 136975220c92..000000000000 --- a/drivers/thermal/tegra_soctherm.c +++ /dev/null @@ -1,476 +0,0 @@ -/* - * Copyright (c) 2014, NVIDIA CORPORATION. All rights reserved. - * - * Author: - * Mikko Perttunen <mperttunen@nvidia.com> - * - * This software is licensed under the terms of the GNU General Public - * License version 2, as published by the Free Software Foundation, and - * may be copied, distributed, and modified under those terms. - * - * This program is distributed in the hope that 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. - * - */ - -#include <linux/bitops.h> -#include <linux/clk.h> -#include <linux/delay.h> -#include <linux/err.h> -#include <linux/interrupt.h> -#include <linux/io.h> -#include <linux/module.h> -#include <linux/of.h> -#include <linux/platform_device.h> -#include <linux/reset.h> -#include <linux/thermal.h> - -#include <soc/tegra/fuse.h> - -#define SENSOR_CONFIG0 0 -#define SENSOR_CONFIG0_STOP BIT(0) -#define SENSOR_CONFIG0_TALL_SHIFT 8 -#define SENSOR_CONFIG0_TCALC_OVER BIT(4) -#define SENSOR_CONFIG0_OVER BIT(3) -#define SENSOR_CONFIG0_CPTR_OVER BIT(2) - -#define SENSOR_CONFIG1 4 -#define SENSOR_CONFIG1_TSAMPLE_SHIFT 0 -#define SENSOR_CONFIG1_TIDDQ_EN_SHIFT 15 -#define SENSOR_CONFIG1_TEN_COUNT_SHIFT 24 -#define SENSOR_CONFIG1_TEMP_ENABLE BIT(31) - -#define SENSOR_CONFIG2 8 -#define SENSOR_CONFIG2_THERMA_SHIFT 16 -#define SENSOR_CONFIG2_THERMB_SHIFT 0 - -#define SENSOR_PDIV 0x1c0 -#define SENSOR_PDIV_T124 0x8888 -#define SENSOR_HOTSPOT_OFF 0x1c4 -#define SENSOR_HOTSPOT_OFF_T124 0x00060600 -#define SENSOR_TEMP1 0x1c8 -#define SENSOR_TEMP2 0x1cc - -#define SENSOR_TEMP_MASK 0xffff -#define READBACK_VALUE_MASK 0xff00 -#define READBACK_VALUE_SHIFT 8 -#define READBACK_ADD_HALF BIT(7) -#define READBACK_NEGATE BIT(0) - -#define FUSE_TSENSOR8_CALIB 0x180 -#define FUSE_SPARE_REALIGNMENT_REG_0 0x1fc - -#define FUSE_TSENSOR_CALIB_CP_TS_BASE_MASK 0x1fff -#define FUSE_TSENSOR_CALIB_FT_TS_BASE_MASK (0x1fff << 13) -#define FUSE_TSENSOR_CALIB_FT_TS_BASE_SHIFT 13 - -#define FUSE_TSENSOR8_CALIB_CP_TS_BASE_MASK 0x3ff -#define FUSE_TSENSOR8_CALIB_FT_TS_BASE_MASK (0x7ff << 10) -#define FUSE_TSENSOR8_CALIB_FT_TS_BASE_SHIFT 10 - -#define FUSE_SPARE_REALIGNMENT_REG_SHIFT_CP_MASK 0x3f -#define FUSE_SPARE_REALIGNMENT_REG_SHIFT_FT_MASK (0x1f << 21) -#define FUSE_SPARE_REALIGNMENT_REG_SHIFT_FT_SHIFT 21 - -#define NOMINAL_CALIB_FT_T124 105 -#define NOMINAL_CALIB_CP_T124 25 - -struct tegra_tsensor_configuration { - u32 tall, tsample, tiddq_en, ten_count, pdiv, tsample_ate, pdiv_ate; -}; - -struct tegra_tsensor { - const struct tegra_tsensor_configuration *config; - u32 base, calib_fuse_offset; - /* Correction values used to modify values read from calibration fuses */ - s32 fuse_corr_alpha, fuse_corr_beta; -}; - -struct tegra_thermctl_zone { - void __iomem *reg; - unsigned int shift; -}; - -static const struct tegra_tsensor_configuration t124_tsensor_config = { - .tall = 16300, - .tsample = 120, - .tiddq_en = 1, - .ten_count = 1, - .pdiv = 8, - .tsample_ate = 480, - .pdiv_ate = 8 -}; - -static const struct tegra_tsensor t124_tsensors[] = { - { - .config = &t124_tsensor_config, - .base = 0xc0, - .calib_fuse_offset = 0x098, - .fuse_corr_alpha = 1135400, - .fuse_corr_beta = -6266900, - }, - { - .config = &t124_tsensor_config, - .base = 0xe0, - .calib_fuse_offset = 0x084, - .fuse_corr_alpha = 1122220, - .fuse_corr_beta = -5700700, - }, - { - .config = &t124_tsensor_config, - .base = 0x100, - .calib_fuse_offset = 0x088, - .fuse_corr_alpha = 1127000, - .fuse_corr_beta = -6768200, - }, - { - .config = &t124_tsensor_config, - .base = 0x120, - .calib_fuse_offset = 0x12c, - .fuse_corr_alpha = 1110900, - .fuse_corr_beta = -6232000, - }, - { - .config = &t124_tsensor_config, - .base = 0x140, - .calib_fuse_offset = 0x158, - .fuse_corr_alpha = 1122300, - .fuse_corr_beta = -5936400, - }, - { - .config = &t124_tsensor_config, - .base = 0x160, - .calib_fuse_offset = 0x15c, - .fuse_corr_alpha = 1145700, - .fuse_corr_beta = -7124600, - }, - { - .config = &t124_tsensor_config, - .base = 0x180, - .calib_fuse_offset = 0x154, - .fuse_corr_alpha = 1120100, - .fuse_corr_beta = -6000500, - }, - { - .config = &t124_tsensor_config, - .base = 0x1a0, - .calib_fuse_offset = 0x160, - .fuse_corr_alpha = 1106500, - .fuse_corr_beta = -6729300, - }, -}; - -struct tegra_soctherm { - struct reset_control *reset; - struct clk *clock_tsensor; - struct clk *clock_soctherm; - void __iomem *regs; - - struct thermal_zone_device *thermctl_tzs[4]; -}; - -struct tsensor_shared_calibration { - u32 base_cp, base_ft; - u32 actual_temp_cp, actual_temp_ft; -}; - -static int calculate_shared_calibration(struct tsensor_shared_calibration *r) -{ - u32 val, shifted_cp, shifted_ft; - int err; - - err = tegra_fuse_readl(FUSE_TSENSOR8_CALIB, &val); - if (err) - return err; - r->base_cp = val & FUSE_TSENSOR8_CALIB_CP_TS_BASE_MASK; - r->base_ft = (val & FUSE_TSENSOR8_CALIB_FT_TS_BASE_MASK) - >> FUSE_TSENSOR8_CALIB_FT_TS_BASE_SHIFT; - val = ((val & FUSE_SPARE_REALIGNMENT_REG_SHIFT_FT_MASK) - >> FUSE_SPARE_REALIGNMENT_REG_SHIFT_FT_SHIFT); - shifted_ft = sign_extend32(val, 4); - - err = tegra_fuse_readl(FUSE_SPARE_REALIGNMENT_REG_0, &val); - if (err) - return err; - shifted_cp = sign_extend32(val, 5); - - r->actual_temp_cp = 2 * NOMINAL_CALIB_CP_T124 + shifted_cp; - r->actual_temp_ft = 2 * NOMINAL_CALIB_FT_T124 + shifted_ft; - - return 0; -} - -static s64 div64_s64_precise(s64 a, s64 b) -{ - s64 r, al; - - /* Scale up for increased precision division */ - al = a << 16; - - r = div64_s64(al * 2 + 1, 2 * b); - return r >> 16; -} - -static int -calculate_tsensor_calibration(const struct tegra_tsensor *sensor, - const struct tsensor_shared_calibration *shared, - u32 *calib) -{ - u32 val; - s32 actual_tsensor_ft, actual_tsensor_cp, delta_sens, delta_temp, - mult, div; - s16 therma, thermb; - s64 tmp; - int err; - - err = tegra_fuse_readl(sensor->calib_fuse_offset, &val); - if (err) - return err; - - actual_tsensor_cp = (shared->base_cp * 64) + sign_extend32(val, 12); - val = (val & FUSE_TSENSOR_CALIB_FT_TS_BASE_MASK) - >> FUSE_TSENSOR_CALIB_FT_TS_BASE_SHIFT; - actual_tsensor_ft = (shared->base_ft * 32) + sign_extend32(val, 12); - - delta_sens = actual_tsensor_ft - actual_tsensor_cp; - delta_temp = shared->actual_temp_ft - shared->actual_temp_cp; - - mult = sensor->config->pdiv * sensor->config->tsample_ate; - div = sensor->config->tsample * sensor->config->pdiv_ate; - - therma = div64_s64_precise((s64) delta_temp * (1LL << 13) * mult, - (s64) delta_sens * div); - - tmp = (s64)actual_tsensor_ft * shared->actual_temp_cp - - (s64)actual_tsensor_cp * shared->actual_temp_ft; - thermb = div64_s64_precise(tmp, (s64)delta_sens); - - therma = div64_s64_precise((s64)therma * sensor->fuse_corr_alpha, - (s64)1000000LL); - thermb = div64_s64_precise((s64)thermb * sensor->fuse_corr_alpha + - sensor->fuse_corr_beta, (s64)1000000LL); - - *calib = ((u16)therma << SENSOR_CONFIG2_THERMA_SHIFT) | - ((u16)thermb << SENSOR_CONFIG2_THERMB_SHIFT); - - return 0; -} - -static int enable_tsensor(struct tegra_soctherm *tegra, - const struct tegra_tsensor *sensor, - const struct tsensor_shared_calibration *shared) -{ - void __iomem *base = tegra->regs + sensor->base; - unsigned int val; - u32 calib; - int err; - - err = calculate_tsensor_calibration(sensor, shared, &calib); - if (err) - return err; - - val = sensor->config->tall << SENSOR_CONFIG0_TALL_SHIFT; - writel(val, base + SENSOR_CONFIG0); - - val = (sensor->config->tsample - 1) << SENSOR_CONFIG1_TSAMPLE_SHIFT; - val |= sensor->config->tiddq_en << SENSOR_CONFIG1_TIDDQ_EN_SHIFT; - val |= sensor->config->ten_count << SENSOR_CONFIG1_TEN_COUNT_SHIFT; - val |= SENSOR_CONFIG1_TEMP_ENABLE; - writel(val, base + SENSOR_CONFIG1); - - writel(calib, base + SENSOR_CONFIG2); - - return 0; -} - -/* - * Translate from soctherm readback format to millicelsius. - * The soctherm readback format in bits is as follows: - * TTTTTTTT H______N - * where T's contain the temperature in Celsius, - * H denotes an addition of 0.5 Celsius and N denotes negation - * of the final value. - */ -static int translate_temp(u16 val) -{ - long t; - - t = ((val & READBACK_VALUE_MASK) >> READBACK_VALUE_SHIFT) * 1000; - if (val & READBACK_ADD_HALF) - t += 500; - if (val & READBACK_NEGATE) - t *= -1; - - return t; -} - -static int tegra_thermctl_get_temp(void *data, int *out_temp) -{ - struct tegra_thermctl_zone *zone = data; - u32 val; - - val = (readl(zone->reg) >> zone->shift) & SENSOR_TEMP_MASK; - *out_temp = translate_temp(val); - - return 0; -} - -static const struct thermal_zone_of_device_ops tegra_of_thermal_ops = { - .get_temp = tegra_thermctl_get_temp, -}; - -static const struct of_device_id tegra_soctherm_of_match[] = { - { .compatible = "nvidia,tegra124-soctherm" }, - { }, -}; -MODULE_DEVICE_TABLE(of, tegra_soctherm_of_match); - -struct thermctl_zone_desc { - unsigned int offset; - unsigned int shift; -}; - -static const struct thermctl_zone_desc t124_thermctl_temp_zones[] = { - { SENSOR_TEMP1, 16 }, - { SENSOR_TEMP2, 16 }, - { SENSOR_TEMP1, 0 }, - { SENSOR_TEMP2, 0 } -}; - -static int tegra_soctherm_probe(struct platform_device *pdev) -{ - struct tegra_soctherm *tegra; - struct thermal_zone_device *tz; - struct tsensor_shared_calibration shared_calib; - struct resource *res; - unsigned int i; - int err; - - const struct tegra_tsensor *tsensors = t124_tsensors; - - tegra = devm_kzalloc(&pdev->dev, sizeof(*tegra), GFP_KERNEL); - if (!tegra) - return -ENOMEM; - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - tegra->regs = devm_ioremap_resource(&pdev->dev, res); - if (IS_ERR(tegra->regs)) - return PTR_ERR(tegra->regs); - - tegra->reset = devm_reset_control_get(&pdev->dev, "soctherm"); - if (IS_ERR(tegra->reset)) { - dev_err(&pdev->dev, "can't get soctherm reset\n"); - return PTR_ERR(tegra->reset); - } - - tegra->clock_tsensor = devm_clk_get(&pdev->dev, "tsensor"); - if (IS_ERR(tegra->clock_tsensor)) { - dev_err(&pdev->dev, "can't get tsensor clock\n"); - return PTR_ERR(tegra->clock_tsensor); - } - - tegra->clock_soctherm = devm_clk_get(&pdev->dev, "soctherm"); - if (IS_ERR(tegra->clock_soctherm)) { - dev_err(&pdev->dev, "can't get soctherm clock\n"); - return PTR_ERR(tegra->clock_soctherm); - } - - reset_control_assert(tegra->reset); - - err = clk_prepare_enable(tegra->clock_soctherm); - if (err) - return err; - - err = clk_prepare_enable(tegra->clock_tsensor); - if (err) { - clk_disable_unprepare(tegra->clock_soctherm); - return err; - } - - reset_control_deassert(tegra->reset); - - /* Initialize raw sensors */ - - err = calculate_shared_calibration(&shared_calib); - if (err) - goto disable_clocks; - - for (i = 0; i < ARRAY_SIZE(t124_tsensors); ++i) { - err = enable_tsensor(tegra, tsensors + i, &shared_calib); - if (err) - goto disable_clocks; - } - - writel(SENSOR_PDIV_T124, tegra->regs + SENSOR_PDIV); - writel(SENSOR_HOTSPOT_OFF_T124, tegra->regs + SENSOR_HOTSPOT_OFF); - - /* Initialize thermctl sensors */ - - for (i = 0; i < ARRAY_SIZE(tegra->thermctl_tzs); ++i) { - struct tegra_thermctl_zone *zone = - devm_kzalloc(&pdev->dev, sizeof(*zone), GFP_KERNEL); - if (!zone) { - err = -ENOMEM; - goto unregister_tzs; - } - - zone->reg = tegra->regs + t124_thermctl_temp_zones[i].offset; - zone->shift = t124_thermctl_temp_zones[i].shift; - - tz = thermal_zone_of_sensor_register(&pdev->dev, i, zone, - &tegra_of_thermal_ops); - if (IS_ERR(tz)) { - err = PTR_ERR(tz); - dev_err(&pdev->dev, "failed to register sensor: %d\n", - err); - goto unregister_tzs; - } - - tegra->thermctl_tzs[i] = tz; - } - - return 0; - -unregister_tzs: - while (i--) - thermal_zone_of_sensor_unregister(&pdev->dev, - tegra->thermctl_tzs[i]); - -disable_clocks: - clk_disable_unprepare(tegra->clock_tsensor); - clk_disable_unprepare(tegra->clock_soctherm); - - return err; -} - -static int tegra_soctherm_remove(struct platform_device *pdev) -{ - struct tegra_soctherm *tegra = platform_get_drvdata(pdev); - unsigned int i; - - for (i = 0; i < ARRAY_SIZE(tegra->thermctl_tzs); ++i) { - thermal_zone_of_sensor_unregister(&pdev->dev, - tegra->thermctl_tzs[i]); - } - - clk_disable_unprepare(tegra->clock_tsensor); - clk_disable_unprepare(tegra->clock_soctherm); - - return 0; -} - -static struct platform_driver tegra_soctherm_driver = { - .probe = tegra_soctherm_probe, - .remove = tegra_soctherm_remove, - .driver = { - .name = "tegra-soctherm", - .of_match_table = tegra_soctherm_of_match, - }, -}; -module_platform_driver(tegra_soctherm_driver); - -MODULE_AUTHOR("Mikko Perttunen <mperttunen@nvidia.com>"); -MODULE_DESCRIPTION("NVIDIA Tegra SOCTHERM thermal management driver"); -MODULE_LICENSE("GPL v2"); |