From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.9 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A2747C83009 for ; Wed, 29 Apr 2020 18:14:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6998921D79 for ; Wed, 29 Apr 2020 18:14:53 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="cHPzCI5l" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726871AbgD2SOw (ORCPT ); Wed, 29 Apr 2020 14:14:52 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40380 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1726511AbgD2SOw (ORCPT ); Wed, 29 Apr 2020 14:14:52 -0400 Received: from mail-pl1-x642.google.com (mail-pl1-x642.google.com [IPv6:2607:f8b0:4864:20::642]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E6D83C035493 for ; Wed, 29 Apr 2020 11:14:50 -0700 (PDT) Received: by mail-pl1-x642.google.com with SMTP id s10so1143290plr.1 for ; Wed, 29 Apr 2020 11:14:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=04WNxnJhiXYXCXBlE2vEsRAkvoVENCHXpxiMuJ1DsD4=; b=cHPzCI5li9e76pSS3yrEdeF1XAXzbR/o2mid1JcI19EnhIV+VAVSsWD/kgocgU/Reu +DUXFIzXH/qhkaOCk7a6UPBEBzJH0dWnnHBuFFy+06dtQA0tGIUR6s1qYeMlK5x9eHqm qWQiCeW49I46cAY/NuqCQorajHsv/FjPCy6L25IHRUBG6TT5+65GidLlBnnpYp8qX/4s lS7XRtWkKu6cN9jaf+y/upgKrPbWVyHIAjMxcNymyySQ21h2pdgLylyF5II6ur+jJmAD UGS9G5hkV55OQvgl4EtxAEmEsIV12dIg1YAobII7oP3W/ARcmu2Zt7jgrY/HJcnrR4Ys Qo1A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=04WNxnJhiXYXCXBlE2vEsRAkvoVENCHXpxiMuJ1DsD4=; b=VWmNpME0hLJo0YkBX/429HukmsMrOhXqic+Hwv9tNL89dQ5hyZ0O+3MmI1O86ZxdN5 Cw3gdfxSZUIajy9whCsQGxeZXIXfv2udyywl2sRCK4JF1ecT7p7ThOUADKlhwqs/vdWV sGq04LIAe0nQ7zu2fEhGJPY6ybgw8SmGdX9bgToIeZLM/rgrKNkm3/8OaUVk2zIf5pXz Nm2BPznyg4II8UI/oVRzYxzjsBosCIpWTHDbss4yX4ZNb5Nd4lxPC7/jggyhM3AtwAPT Rvm49hV84xtYNBPhUlE7GrvdwLA4jVGAVMKdhX12kIiPx8AsIO7wBZ6HatxS3dAcK1zj fp4g== X-Gm-Message-State: AGi0Publc1otuHii43kFk7VwMzpRtVRmwHRwBa/zH8si4t3YPlEGTzyk g50OcqJXLltbybE+r5IFyqZ6mu1n71s= X-Google-Smtp-Source: APiQypJUXsEagWJYSMZppPX3EWHhVkDSfu8lWg5acXnBz43PtV0/swrclqLTwQlR42Lgk8hN9v1dtg== X-Received: by 2002:a17:90a:246d:: with SMTP id h100mr4872275pje.58.1588184088643; Wed, 29 Apr 2020 11:14:48 -0700 (PDT) Received: from localhost ([45.127.44.67]) by smtp.gmail.com with ESMTPSA id y10sm1560807pfb.53.2020.04.29.11.14.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 29 Apr 2020 11:14:47 -0700 (PDT) From: Amit Kucheria To: linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, bjorn.andersson@linaro.org, daniel.lezcano@linaro.org, Andy Gross Cc: Amit Kucheria , linux-pm@vger.kernel.org Subject: [PATCH] drivers: thermal: tsens: Merge tsens-common.c into tsens.c Date: Wed, 29 Apr 2020 23:44:17 +0530 Message-Id: X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org tsens-common.c has outlived its usefuless. It was created expecting lots of custom routines per version of the TSENS IP. We haven't needed those, there is now only data in the version-specific files. Merge the code for tsens-common.c into tsens.c. As a result, - Remove any unnecessary forward declarations in tsens.h. - Add a Linaro copyright to tsens.c. - Fixup the Makefile to remove tsens-common.c. - Where it made sense, fix some 80-column alignments in the tsens-common.c code being copied over. There is no functional change with this patch. Signed-off-by: Amit Kucheria --- drivers/thermal/qcom/Makefile | 4 +- drivers/thermal/qcom/tsens-common.c | 843 ---------------------------- drivers/thermal/qcom/tsens.c | 838 +++++++++++++++++++++++++++ drivers/thermal/qcom/tsens.h | 5 - 4 files changed, 840 insertions(+), 850 deletions(-) delete mode 100644 drivers/thermal/qcom/tsens-common.c diff --git a/drivers/thermal/qcom/Makefile b/drivers/thermal/qcom/Makefile index 7c8dc6e366936..ec86eef7f6a6b 100644 --- a/drivers/thermal/qcom/Makefile +++ b/drivers/thermal/qcom/Makefile @@ -1,6 +1,6 @@ # SPDX-License-Identifier: GPL-2.0-only obj-$(CONFIG_QCOM_TSENS) += qcom_tsens.o -qcom_tsens-y += tsens.o tsens-common.o tsens-v0_1.o \ - tsens-8960.o tsens-v2.o tsens-v1.o +qcom_tsens-y += tsens.o tsens-v2.o tsens-v1.o tsens-v0_1.o \ + tsens-8960.o obj-$(CONFIG_QCOM_SPMI_TEMP_ALARM) += qcom-spmi-temp-alarm.o diff --git a/drivers/thermal/qcom/tsens-common.c b/drivers/thermal/qcom/tsens-common.c deleted file mode 100644 index 172545366636e..0000000000000 --- a/drivers/thermal/qcom/tsens-common.c +++ /dev/null @@ -1,843 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * Copyright (c) 2015, The Linux Foundation. All rights reserved. - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include "tsens.h" - -/** - * struct tsens_irq_data - IRQ status and temperature violations - * @up_viol: upper threshold violated - * @up_thresh: upper threshold temperature value - * @up_irq_mask: mask register for upper threshold irqs - * @up_irq_clear: clear register for uppper threshold irqs - * @low_viol: lower threshold violated - * @low_thresh: lower threshold temperature value - * @low_irq_mask: mask register for lower threshold irqs - * @low_irq_clear: clear register for lower threshold irqs - * @crit_viol: critical threshold violated - * @crit_thresh: critical threshold temperature value - * @crit_irq_mask: mask register for critical threshold irqs - * @crit_irq_clear: clear register for critical threshold irqs - * - * Structure containing data about temperature threshold settings and - * irq status if they were violated. - */ -struct tsens_irq_data { - u32 up_viol; - int up_thresh; - u32 up_irq_mask; - u32 up_irq_clear; - u32 low_viol; - int low_thresh; - u32 low_irq_mask; - u32 low_irq_clear; - u32 crit_viol; - u32 crit_thresh; - u32 crit_irq_mask; - u32 crit_irq_clear; -}; - -char *qfprom_read(struct device *dev, const char *cname) -{ - struct nvmem_cell *cell; - ssize_t data; - char *ret; - - cell = nvmem_cell_get(dev, cname); - if (IS_ERR(cell)) - return ERR_CAST(cell); - - ret = nvmem_cell_read(cell, &data); - nvmem_cell_put(cell); - - return ret; -} - -/* - * Use this function on devices where slope and offset calculations - * depend on calibration data read from qfprom. On others the slope - * and offset values are derived from tz->tzp->slope and tz->tzp->offset - * resp. - */ -void compute_intercept_slope(struct tsens_priv *priv, u32 *p1, - u32 *p2, u32 mode) -{ - int i; - int num, den; - - for (i = 0; i < priv->num_sensors; i++) { - dev_dbg(priv->dev, - "%s: sensor%d - data_point1:%#x data_point2:%#x\n", - __func__, i, p1[i], p2[i]); - - priv->sensor[i].slope = SLOPE_DEFAULT; - if (mode == TWO_PT_CALIB) { - /* - * slope (m) = adc_code2 - adc_code1 (y2 - y1)/ - * temp_120_degc - temp_30_degc (x2 - x1) - */ - num = p2[i] - p1[i]; - num *= SLOPE_FACTOR; - den = CAL_DEGC_PT2 - CAL_DEGC_PT1; - priv->sensor[i].slope = num / den; - } - - priv->sensor[i].offset = (p1[i] * SLOPE_FACTOR) - - (CAL_DEGC_PT1 * - priv->sensor[i].slope); - dev_dbg(priv->dev, "%s: offset:%d\n", __func__, priv->sensor[i].offset); - } -} - -static inline u32 degc_to_code(int degc, const struct tsens_sensor *s) -{ - u64 code = div_u64(((u64)degc * s->slope + s->offset), SLOPE_FACTOR); - - pr_debug("%s: raw_code: 0x%llx, degc:%d\n", __func__, code, degc); - return clamp_val(code, THRESHOLD_MIN_ADC_CODE, THRESHOLD_MAX_ADC_CODE); -} - -static inline int code_to_degc(u32 adc_code, const struct tsens_sensor *s) -{ - int degc, num, den; - - num = (adc_code * SLOPE_FACTOR) - s->offset; - den = s->slope; - - if (num > 0) - degc = num + (den / 2); - else if (num < 0) - degc = num - (den / 2); - else - degc = num; - - degc /= den; - - return degc; -} - -/** - * tsens_hw_to_mC - Return sign-extended temperature in mCelsius. - * @s: Pointer to sensor struct - * @field: Index into regmap_field array pointing to temperature data - * - * This function handles temperature returned in ADC code or deciCelsius - * depending on IP version. - * - * Return: Temperature in milliCelsius on success, a negative errno will - * be returned in error cases - */ -static int tsens_hw_to_mC(const struct tsens_sensor *s, int field) -{ - struct tsens_priv *priv = s->priv; - u32 resolution; - u32 temp = 0; - int ret; - - resolution = priv->fields[LAST_TEMP_0].msb - - priv->fields[LAST_TEMP_0].lsb; - - ret = regmap_field_read(priv->rf[field], &temp); - if (ret) - return ret; - - /* Convert temperature from ADC code to milliCelsius */ - if (priv->feat->adc) - return code_to_degc(temp, s) * 1000; - - /* deciCelsius -> milliCelsius along with sign extension */ - return sign_extend32(temp, resolution) * 100; -} - -/** - * tsens_mC_to_hw - Convert temperature to hardware register value - * @s: Pointer to sensor struct - * @temp: temperature in milliCelsius to be programmed to hardware - * - * This function outputs the value to be written to hardware in ADC code - * or deciCelsius depending on IP version. - * - * Return: ADC code or temperature in deciCelsius. - */ -static int tsens_mC_to_hw(const struct tsens_sensor *s, int temp) -{ - struct tsens_priv *priv = s->priv; - - /* milliC to adc code */ - if (priv->feat->adc) - return degc_to_code(temp / 1000, s); - - /* milliC to deciC */ - return temp / 100; -} - -static inline enum tsens_ver tsens_version(struct tsens_priv *priv) -{ - return priv->feat->ver_major; -} - -static void tsens_set_interrupt_v1(struct tsens_priv *priv, u32 hw_id, - enum tsens_irq_type irq_type, bool enable) -{ - u32 index = 0; - - switch (irq_type) { - case UPPER: - index = UP_INT_CLEAR_0 + hw_id; - break; - case LOWER: - index = LOW_INT_CLEAR_0 + hw_id; - break; - case CRITICAL: - /* No critical interrupts before v2 */ - return; - } - regmap_field_write(priv->rf[index], enable ? 0 : 1); -} - -static void tsens_set_interrupt_v2(struct tsens_priv *priv, u32 hw_id, - enum tsens_irq_type irq_type, bool enable) -{ - u32 index_mask = 0, index_clear = 0; - - /* - * To enable the interrupt flag for a sensor: - * - clear the mask bit - * To disable the interrupt flag for a sensor: - * - Mask further interrupts for this sensor - * - Write 1 followed by 0 to clear the interrupt - */ - switch (irq_type) { - case UPPER: - index_mask = UP_INT_MASK_0 + hw_id; - index_clear = UP_INT_CLEAR_0 + hw_id; - break; - case LOWER: - index_mask = LOW_INT_MASK_0 + hw_id; - index_clear = LOW_INT_CLEAR_0 + hw_id; - break; - case CRITICAL: - index_mask = CRIT_INT_MASK_0 + hw_id; - index_clear = CRIT_INT_CLEAR_0 + hw_id; - break; - } - - if (enable) { - regmap_field_write(priv->rf[index_mask], 0); - } else { - regmap_field_write(priv->rf[index_mask], 1); - regmap_field_write(priv->rf[index_clear], 1); - regmap_field_write(priv->rf[index_clear], 0); - } -} - -/** - * tsens_set_interrupt - Set state of an interrupt - * @priv: Pointer to tsens controller private data - * @hw_id: Hardware ID aka. sensor number - * @irq_type: irq_type from enum tsens_irq_type - * @enable: false = disable, true = enable - * - * Call IP-specific function to set state of an interrupt - * - * Return: void - */ -static void tsens_set_interrupt(struct tsens_priv *priv, u32 hw_id, - enum tsens_irq_type irq_type, bool enable) -{ - dev_dbg(priv->dev, "[%u] %s: %s -> %s\n", hw_id, __func__, - irq_type ? ((irq_type == 1) ? "UP" : "CRITICAL") : "LOW", - enable ? "en" : "dis"); - if (tsens_version(priv) > VER_1_X) - tsens_set_interrupt_v2(priv, hw_id, irq_type, enable); - else - tsens_set_interrupt_v1(priv, hw_id, irq_type, enable); -} - -/** - * tsens_threshold_violated - Check if a sensor temperature violated a preset threshold - * @priv: Pointer to tsens controller private data - * @hw_id: Hardware ID aka. sensor number - * @d: Pointer to irq state data - * - * Return: 0 if threshold was not violated, 1 if it was violated and negative - * errno in case of errors - */ -static int tsens_threshold_violated(struct tsens_priv *priv, u32 hw_id, - struct tsens_irq_data *d) -{ - int ret; - - ret = regmap_field_read(priv->rf[UPPER_STATUS_0 + hw_id], &d->up_viol); - if (ret) - return ret; - ret = regmap_field_read(priv->rf[LOWER_STATUS_0 + hw_id], &d->low_viol); - if (ret) - return ret; - - if (priv->feat->crit_int) { - ret = regmap_field_read(priv->rf[CRITICAL_STATUS_0 + hw_id], - &d->crit_viol); - if (ret) - return ret; - } - - if (d->up_viol || d->low_viol || d->crit_viol) - return 1; - - return 0; -} - -static int tsens_read_irq_state(struct tsens_priv *priv, u32 hw_id, - const struct tsens_sensor *s, - struct tsens_irq_data *d) -{ - int ret; - - ret = regmap_field_read(priv->rf[UP_INT_CLEAR_0 + hw_id], &d->up_irq_clear); - if (ret) - return ret; - ret = regmap_field_read(priv->rf[LOW_INT_CLEAR_0 + hw_id], &d->low_irq_clear); - if (ret) - return ret; - if (tsens_version(priv) > VER_1_X) { - ret = regmap_field_read(priv->rf[UP_INT_MASK_0 + hw_id], &d->up_irq_mask); - if (ret) - return ret; - ret = regmap_field_read(priv->rf[LOW_INT_MASK_0 + hw_id], &d->low_irq_mask); - if (ret) - return ret; - ret = regmap_field_read(priv->rf[CRIT_INT_CLEAR_0 + hw_id], - &d->crit_irq_clear); - if (ret) - return ret; - ret = regmap_field_read(priv->rf[CRIT_INT_MASK_0 + hw_id], - &d->crit_irq_mask); - if (ret) - return ret; - - d->crit_thresh = tsens_hw_to_mC(s, CRIT_THRESH_0 + hw_id); - } else { - /* No mask register on older TSENS */ - d->up_irq_mask = 0; - d->low_irq_mask = 0; - d->crit_irq_clear = 0; - d->crit_irq_mask = 0; - d->crit_thresh = 0; - } - - d->up_thresh = tsens_hw_to_mC(s, UP_THRESH_0 + hw_id); - d->low_thresh = tsens_hw_to_mC(s, LOW_THRESH_0 + hw_id); - - dev_dbg(priv->dev, "[%u] %s%s: status(%u|%u|%u) | clr(%u|%u|%u) | mask(%u|%u|%u)\n", - hw_id, __func__, - (d->up_viol || d->low_viol || d->crit_viol) ? "(V)" : "", - d->low_viol, d->up_viol, d->crit_viol, - d->low_irq_clear, d->up_irq_clear, d->crit_irq_clear, - d->low_irq_mask, d->up_irq_mask, d->crit_irq_mask); - dev_dbg(priv->dev, "[%u] %s%s: thresh: (%d:%d:%d)\n", hw_id, __func__, - (d->up_viol || d->low_viol || d->crit_viol) ? "(V)" : "", - d->low_thresh, d->up_thresh, d->crit_thresh); - - return 0; -} - -static inline u32 masked_irq(u32 hw_id, u32 mask, enum tsens_ver ver) -{ - if (ver > VER_1_X) - return mask & (1 << hw_id); - - /* v1, v0.1 don't have a irq mask register */ - return 0; -} - -/** - * tsens_critical_irq_thread() - Threaded handler for critical interrupts - * @irq: irq number - * @data: tsens controller private data - * - * Check FSM watchdog bark status and clear if needed. - * Check all sensors to find ones that violated their critical threshold limits. - * Clear and then re-enable the interrupt. - * - * The level-triggered interrupt might deassert if the temperature returned to - * within the threshold limits by the time the handler got scheduled. We - * consider the irq to have been handled in that case. - * - * Return: IRQ_HANDLED - */ -irqreturn_t tsens_critical_irq_thread(int irq, void *data) -{ - struct tsens_priv *priv = data; - struct tsens_irq_data d; - int temp, ret, i; - u32 wdog_status, wdog_count; - - if (priv->feat->has_watchdog) { - ret = regmap_field_read(priv->rf[WDOG_BARK_STATUS], - &wdog_status); - if (ret) - return ret; - - if (wdog_status) { - /* Clear WDOG interrupt */ - regmap_field_write(priv->rf[WDOG_BARK_CLEAR], 1); - regmap_field_write(priv->rf[WDOG_BARK_CLEAR], 0); - ret = regmap_field_read(priv->rf[WDOG_BARK_COUNT], - &wdog_count); - if (ret) - return ret; - if (wdog_count) - dev_dbg(priv->dev, "%s: watchdog count: %d\n", - __func__, wdog_count); - - /* Fall through to handle critical interrupts if any */ - } - } - - for (i = 0; i < priv->num_sensors; i++) { - const struct tsens_sensor *s = &priv->sensor[i]; - u32 hw_id = s->hw_id; - - if (IS_ERR(s->tzd)) - continue; - if (!tsens_threshold_violated(priv, hw_id, &d)) - continue; - ret = get_temp_tsens_valid(s, &temp); - if (ret) { - dev_err(priv->dev, "[%u] %s: error reading sensor\n", - hw_id, __func__); - continue; - } - - tsens_read_irq_state(priv, hw_id, s, &d); - if (d.crit_viol && - !masked_irq(hw_id, d.crit_irq_mask, tsens_version(priv))) { - /* Mask critical interrupts, unused on Linux */ - tsens_set_interrupt(priv, hw_id, CRITICAL, false); - } - } - - return IRQ_HANDLED; -} - -/** - * tsens_irq_thread - Threaded interrupt handler for uplow interrupts - * @irq: irq number - * @data: tsens controller private data - * - * Check all sensors to find ones that violated their threshold limits. If the - * temperature is still outside the limits, call thermal_zone_device_update() to - * update the thresholds, else re-enable the interrupts. - * - * The level-triggered interrupt might deassert if the temperature returned to - * within the threshold limits by the time the handler got scheduled. We - * consider the irq to have been handled in that case. - * - * Return: IRQ_HANDLED - */ -irqreturn_t tsens_irq_thread(int irq, void *data) -{ - struct tsens_priv *priv = data; - struct tsens_irq_data d; - bool enable = true, disable = false; - unsigned long flags; - int temp, ret, i; - - for (i = 0; i < priv->num_sensors; i++) { - bool trigger = false; - const struct tsens_sensor *s = &priv->sensor[i]; - u32 hw_id = s->hw_id; - - if (IS_ERR(s->tzd)) - continue; - if (!tsens_threshold_violated(priv, hw_id, &d)) - continue; - ret = get_temp_tsens_valid(s, &temp); - if (ret) { - dev_err(priv->dev, "[%u] %s: error reading sensor\n", hw_id, __func__); - continue; - } - - spin_lock_irqsave(&priv->ul_lock, flags); - - tsens_read_irq_state(priv, hw_id, s, &d); - - if (d.up_viol && - !masked_irq(hw_id, d.up_irq_mask, tsens_version(priv))) { - tsens_set_interrupt(priv, hw_id, UPPER, disable); - if (d.up_thresh > temp) { - dev_dbg(priv->dev, "[%u] %s: re-arm upper\n", - hw_id, __func__); - tsens_set_interrupt(priv, hw_id, UPPER, enable); - } else { - trigger = true; - /* Keep irq masked */ - } - } else if (d.low_viol && - !masked_irq(hw_id, d.low_irq_mask, tsens_version(priv))) { - tsens_set_interrupt(priv, hw_id, LOWER, disable); - if (d.low_thresh < temp) { - dev_dbg(priv->dev, "[%u] %s: re-arm low\n", - hw_id, __func__); - tsens_set_interrupt(priv, hw_id, LOWER, enable); - } else { - trigger = true; - /* Keep irq masked */ - } - } - - spin_unlock_irqrestore(&priv->ul_lock, flags); - - if (trigger) { - dev_dbg(priv->dev, "[%u] %s: TZ update trigger (%d mC)\n", - hw_id, __func__, temp); - thermal_zone_device_update(s->tzd, - THERMAL_EVENT_UNSPECIFIED); - } else { - dev_dbg(priv->dev, "[%u] %s: no violation: %d\n", - hw_id, __func__, temp); - } - } - - return IRQ_HANDLED; -} - -int tsens_set_trips(void *_sensor, int low, int high) -{ - struct tsens_sensor *s = _sensor; - struct tsens_priv *priv = s->priv; - struct device *dev = priv->dev; - struct tsens_irq_data d; - unsigned long flags; - int high_val, low_val, cl_high, cl_low; - u32 hw_id = s->hw_id; - - dev_dbg(dev, "[%u] %s: proposed thresholds: (%d:%d)\n", - hw_id, __func__, low, high); - - cl_high = clamp_val(high, -40000, 120000); - cl_low = clamp_val(low, -40000, 120000); - - high_val = tsens_mC_to_hw(s, cl_high); - low_val = tsens_mC_to_hw(s, cl_low); - - spin_lock_irqsave(&priv->ul_lock, flags); - - tsens_read_irq_state(priv, hw_id, s, &d); - - /* Write the new thresholds and clear the status */ - regmap_field_write(priv->rf[LOW_THRESH_0 + hw_id], low_val); - regmap_field_write(priv->rf[UP_THRESH_0 + hw_id], high_val); - tsens_set_interrupt(priv, hw_id, LOWER, true); - tsens_set_interrupt(priv, hw_id, UPPER, true); - - spin_unlock_irqrestore(&priv->ul_lock, flags); - - dev_dbg(dev, "[%u] %s: (%d:%d)->(%d:%d)\n", - hw_id, __func__, d.low_thresh, d.up_thresh, cl_low, cl_high); - - return 0; -} - -int tsens_enable_irq(struct tsens_priv *priv) -{ - int ret; - int val = tsens_version(priv) > VER_1_X ? 7 : 1; - - ret = regmap_field_write(priv->rf[INT_EN], val); - if (ret < 0) - dev_err(priv->dev, "%s: failed to enable interrupts\n", __func__); - - return ret; -} - -void tsens_disable_irq(struct tsens_priv *priv) -{ - regmap_field_write(priv->rf[INT_EN], 0); -} - -int get_temp_tsens_valid(const struct tsens_sensor *s, int *temp) -{ - struct tsens_priv *priv = s->priv; - int hw_id = s->hw_id; - u32 temp_idx = LAST_TEMP_0 + hw_id; - u32 valid_idx = VALID_0 + hw_id; - u32 valid; - int ret; - - ret = regmap_field_read(priv->rf[valid_idx], &valid); - if (ret) - return ret; - while (!valid) { - /* Valid bit is 0 for 6 AHB clock cycles. - * At 19.2MHz, 1 AHB clock is ~60ns. - * We should enter this loop very, very rarely. - */ - ndelay(400); - ret = regmap_field_read(priv->rf[valid_idx], &valid); - if (ret) - return ret; - } - - /* Valid bit is set, OK to read the temperature */ - *temp = tsens_hw_to_mC(s, temp_idx); - - return 0; -} - -int get_temp_common(const struct tsens_sensor *s, int *temp) -{ - struct tsens_priv *priv = s->priv; - int hw_id = s->hw_id; - int last_temp = 0, ret; - - ret = regmap_field_read(priv->rf[LAST_TEMP_0 + hw_id], &last_temp); - if (ret) - return ret; - - *temp = code_to_degc(last_temp, s) * 1000; - - return 0; -} - -#ifdef CONFIG_DEBUG_FS -static int dbg_sensors_show(struct seq_file *s, void *data) -{ - struct platform_device *pdev = s->private; - struct tsens_priv *priv = platform_get_drvdata(pdev); - int i; - - seq_printf(s, "max: %2d\nnum: %2d\n\n", - priv->feat->max_sensors, priv->num_sensors); - - seq_puts(s, " id slope offset\n--------------------------\n"); - for (i = 0; i < priv->num_sensors; i++) { - seq_printf(s, "%8d %8d %8d\n", priv->sensor[i].hw_id, - priv->sensor[i].slope, priv->sensor[i].offset); - } - - return 0; -} - -static int dbg_version_show(struct seq_file *s, void *data) -{ - struct platform_device *pdev = s->private; - struct tsens_priv *priv = platform_get_drvdata(pdev); - u32 maj_ver, min_ver, step_ver; - int ret; - - if (tsens_version(priv) > VER_0_1) { - ret = regmap_field_read(priv->rf[VER_MAJOR], &maj_ver); - if (ret) - return ret; - ret = regmap_field_read(priv->rf[VER_MINOR], &min_ver); - if (ret) - return ret; - ret = regmap_field_read(priv->rf[VER_STEP], &step_ver); - if (ret) - return ret; - seq_printf(s, "%d.%d.%d\n", maj_ver, min_ver, step_ver); - } else { - seq_puts(s, "0.1.0\n"); - } - - return 0; -} - -DEFINE_SHOW_ATTRIBUTE(dbg_version); -DEFINE_SHOW_ATTRIBUTE(dbg_sensors); - -static void tsens_debug_init(struct platform_device *pdev) -{ - struct tsens_priv *priv = platform_get_drvdata(pdev); - struct dentry *root, *file; - - root = debugfs_lookup("tsens", NULL); - if (!root) - priv->debug_root = debugfs_create_dir("tsens", NULL); - else - priv->debug_root = root; - - file = debugfs_lookup("version", priv->debug_root); - if (!file) - debugfs_create_file("version", 0444, priv->debug_root, - pdev, &dbg_version_fops); - - /* A directory for each instance of the TSENS IP */ - priv->debug = debugfs_create_dir(dev_name(&pdev->dev), priv->debug_root); - debugfs_create_file("sensors", 0444, priv->debug, pdev, &dbg_sensors_fops); -} -#else -static inline void tsens_debug_init(struct platform_device *pdev) {} -#endif - -static const struct regmap_config tsens_config = { - .name = "tm", - .reg_bits = 32, - .val_bits = 32, - .reg_stride = 4, -}; - -static const struct regmap_config tsens_srot_config = { - .name = "srot", - .reg_bits = 32, - .val_bits = 32, - .reg_stride = 4, -}; - -int __init init_common(struct tsens_priv *priv) -{ - void __iomem *tm_base, *srot_base; - struct device *dev = priv->dev; - u32 ver_minor; - struct resource *res; - u32 enabled; - int ret, i, j; - struct platform_device *op = of_find_device_by_node(priv->dev->of_node); - - if (!op) - return -EINVAL; - - if (op->num_resources > 1) { - /* DT with separate SROT and TM address space */ - priv->tm_offset = 0; - res = platform_get_resource(op, IORESOURCE_MEM, 1); - srot_base = devm_ioremap_resource(dev, res); - if (IS_ERR(srot_base)) { - ret = PTR_ERR(srot_base); - goto err_put_device; - } - - priv->srot_map = devm_regmap_init_mmio(dev, srot_base, - &tsens_srot_config); - if (IS_ERR(priv->srot_map)) { - ret = PTR_ERR(priv->srot_map); - goto err_put_device; - } - } else { - /* old DTs where SROT and TM were in a contiguous 2K block */ - priv->tm_offset = 0x1000; - } - - res = platform_get_resource(op, IORESOURCE_MEM, 0); - tm_base = devm_ioremap_resource(dev, res); - if (IS_ERR(tm_base)) { - ret = PTR_ERR(tm_base); - goto err_put_device; - } - - priv->tm_map = devm_regmap_init_mmio(dev, tm_base, &tsens_config); - if (IS_ERR(priv->tm_map)) { - ret = PTR_ERR(priv->tm_map); - goto err_put_device; - } - - if (tsens_version(priv) > VER_0_1) { - for (i = VER_MAJOR; i <= VER_STEP; i++) { - priv->rf[i] = devm_regmap_field_alloc(dev, priv->srot_map, - priv->fields[i]); - if (IS_ERR(priv->rf[i])) - return PTR_ERR(priv->rf[i]); - } - ret = regmap_field_read(priv->rf[VER_MINOR], &ver_minor); - if (ret) - goto err_put_device; - } - - priv->rf[TSENS_EN] = devm_regmap_field_alloc(dev, priv->srot_map, - priv->fields[TSENS_EN]); - if (IS_ERR(priv->rf[TSENS_EN])) { - ret = PTR_ERR(priv->rf[TSENS_EN]); - goto err_put_device; - } - ret = regmap_field_read(priv->rf[TSENS_EN], &enabled); - if (ret) - goto err_put_device; - if (!enabled) { - dev_err(dev, "%s: device not enabled\n", __func__); - ret = -ENODEV; - goto err_put_device; - } - - priv->rf[SENSOR_EN] = devm_regmap_field_alloc(dev, priv->srot_map, - priv->fields[SENSOR_EN]); - if (IS_ERR(priv->rf[SENSOR_EN])) { - ret = PTR_ERR(priv->rf[SENSOR_EN]); - goto err_put_device; - } - priv->rf[INT_EN] = devm_regmap_field_alloc(dev, priv->tm_map, - priv->fields[INT_EN]); - if (IS_ERR(priv->rf[INT_EN])) { - ret = PTR_ERR(priv->rf[INT_EN]); - goto err_put_device; - } - - /* This loop might need changes if enum regfield_ids is reordered */ - for (j = LAST_TEMP_0; j <= UP_THRESH_15; j += 16) { - for (i = 0; i < priv->feat->max_sensors; i++) { - int idx = j + i; - - priv->rf[idx] = devm_regmap_field_alloc(dev, priv->tm_map, - priv->fields[idx]); - if (IS_ERR(priv->rf[idx])) { - ret = PTR_ERR(priv->rf[idx]); - goto err_put_device; - } - } - } - - if (priv->feat->crit_int) { - /* Loop might need changes if enum regfield_ids is reordered */ - for (j = CRITICAL_STATUS_0; j <= CRIT_THRESH_15; j += 16) { - for (i = 0; i < priv->feat->max_sensors; i++) { - int idx = j + i; - - priv->rf[idx] = - devm_regmap_field_alloc(dev, - priv->tm_map, - priv->fields[idx]); - if (IS_ERR(priv->rf[idx])) { - ret = PTR_ERR(priv->rf[idx]); - goto err_put_device; - } - } - } - } - - if (tsens_version(priv) > VER_1_X && ver_minor > 2) { - /* Watchdog is present only on v2.3+ */ - priv->feat->has_watchdog = 1; - for (i = WDOG_BARK_STATUS; i <= CC_MON_MASK; i++) { - priv->rf[i] = devm_regmap_field_alloc(dev, priv->tm_map, - priv->fields[i]); - if (IS_ERR(priv->rf[i])) { - ret = PTR_ERR(priv->rf[i]); - goto err_put_device; - } - } - /* - * Watchdog is already enabled, unmask the bark. - * Disable cycle completion monitoring - */ - regmap_field_write(priv->rf[WDOG_BARK_MASK], 0); - regmap_field_write(priv->rf[CC_MON_MASK], 1); - } - - spin_lock_init(&priv->ul_lock); - tsens_enable_irq(priv); - tsens_debug_init(op); - -err_put_device: - put_device(&op->dev); - return ret; -} diff --git a/drivers/thermal/qcom/tsens.c b/drivers/thermal/qcom/tsens.c index 2f77d235cf735..8d3e94d2a9ed4 100644 --- a/drivers/thermal/qcom/tsens.c +++ b/drivers/thermal/qcom/tsens.c @@ -1,19 +1,857 @@ // SPDX-License-Identifier: GPL-2.0 /* * Copyright (c) 2015, The Linux Foundation. All rights reserved. + * Copyright (c) 2019, 2020, Linaro Ltd. */ #include #include +#include #include +#include #include +#include #include #include #include +#include #include #include #include "tsens.h" +/** + * struct tsens_irq_data - IRQ status and temperature violations + * @up_viol: upper threshold violated + * @up_thresh: upper threshold temperature value + * @up_irq_mask: mask register for upper threshold irqs + * @up_irq_clear: clear register for uppper threshold irqs + * @low_viol: lower threshold violated + * @low_thresh: lower threshold temperature value + * @low_irq_mask: mask register for lower threshold irqs + * @low_irq_clear: clear register for lower threshold irqs + * @crit_viol: critical threshold violated + * @crit_thresh: critical threshold temperature value + * @crit_irq_mask: mask register for critical threshold irqs + * @crit_irq_clear: clear register for critical threshold irqs + * + * Structure containing data about temperature threshold settings and + * irq status if they were violated. + */ +struct tsens_irq_data { + u32 up_viol; + int up_thresh; + u32 up_irq_mask; + u32 up_irq_clear; + u32 low_viol; + int low_thresh; + u32 low_irq_mask; + u32 low_irq_clear; + u32 crit_viol; + u32 crit_thresh; + u32 crit_irq_mask; + u32 crit_irq_clear; +}; + +char *qfprom_read(struct device *dev, const char *cname) +{ + struct nvmem_cell *cell; + ssize_t data; + char *ret; + + cell = nvmem_cell_get(dev, cname); + if (IS_ERR(cell)) + return ERR_CAST(cell); + + ret = nvmem_cell_read(cell, &data); + nvmem_cell_put(cell); + + return ret; +} + +/* + * Use this function on devices where slope and offset calculations + * depend on calibration data read from qfprom. On others the slope + * and offset values are derived from tz->tzp->slope and tz->tzp->offset + * resp. + */ +void compute_intercept_slope(struct tsens_priv *priv, u32 *p1, + u32 *p2, u32 mode) +{ + int i; + int num, den; + + for (i = 0; i < priv->num_sensors; i++) { + dev_dbg(priv->dev, + "%s: sensor%d - data_point1:%#x data_point2:%#x\n", + __func__, i, p1[i], p2[i]); + + priv->sensor[i].slope = SLOPE_DEFAULT; + if (mode == TWO_PT_CALIB) { + /* + * slope (m) = adc_code2 - adc_code1 (y2 - y1)/ + * temp_120_degc - temp_30_degc (x2 - x1) + */ + num = p2[i] - p1[i]; + num *= SLOPE_FACTOR; + den = CAL_DEGC_PT2 - CAL_DEGC_PT1; + priv->sensor[i].slope = num / den; + } + + priv->sensor[i].offset = (p1[i] * SLOPE_FACTOR) - + (CAL_DEGC_PT1 * + priv->sensor[i].slope); + dev_dbg(priv->dev, "%s: offset:%d\n", __func__, + priv->sensor[i].offset); + } +} + +static inline u32 degc_to_code(int degc, const struct tsens_sensor *s) +{ + u64 code = div_u64(((u64)degc * s->slope + s->offset), SLOPE_FACTOR); + + pr_debug("%s: raw_code: 0x%llx, degc:%d\n", __func__, code, degc); + return clamp_val(code, THRESHOLD_MIN_ADC_CODE, THRESHOLD_MAX_ADC_CODE); +} + +static inline int code_to_degc(u32 adc_code, const struct tsens_sensor *s) +{ + int degc, num, den; + + num = (adc_code * SLOPE_FACTOR) - s->offset; + den = s->slope; + + if (num > 0) + degc = num + (den / 2); + else if (num < 0) + degc = num - (den / 2); + else + degc = num; + + degc /= den; + + return degc; +} + +/** + * tsens_hw_to_mC - Return sign-extended temperature in mCelsius. + * @s: Pointer to sensor struct + * @field: Index into regmap_field array pointing to temperature data + * + * This function handles temperature returned in ADC code or deciCelsius + * depending on IP version. + * + * Return: Temperature in milliCelsius on success, a negative errno will + * be returned in error cases + */ +static int tsens_hw_to_mC(const struct tsens_sensor *s, int field) +{ + struct tsens_priv *priv = s->priv; + u32 resolution; + u32 temp = 0; + int ret; + + resolution = priv->fields[LAST_TEMP_0].msb - + priv->fields[LAST_TEMP_0].lsb; + + ret = regmap_field_read(priv->rf[field], &temp); + if (ret) + return ret; + + /* Convert temperature from ADC code to milliCelsius */ + if (priv->feat->adc) + return code_to_degc(temp, s) * 1000; + + /* deciCelsius -> milliCelsius along with sign extension */ + return sign_extend32(temp, resolution) * 100; +} + +/** + * tsens_mC_to_hw - Convert temperature to hardware register value + * @s: Pointer to sensor struct + * @temp: temperature in milliCelsius to be programmed to hardware + * + * This function outputs the value to be written to hardware in ADC code + * or deciCelsius depending on IP version. + * + * Return: ADC code or temperature in deciCelsius. + */ +static int tsens_mC_to_hw(const struct tsens_sensor *s, int temp) +{ + struct tsens_priv *priv = s->priv; + + /* milliC to adc code */ + if (priv->feat->adc) + return degc_to_code(temp / 1000, s); + + /* milliC to deciC */ + return temp / 100; +} + +static inline enum tsens_ver tsens_version(struct tsens_priv *priv) +{ + return priv->feat->ver_major; +} + +static void tsens_set_interrupt_v1(struct tsens_priv *priv, u32 hw_id, + enum tsens_irq_type irq_type, bool enable) +{ + u32 index = 0; + + switch (irq_type) { + case UPPER: + index = UP_INT_CLEAR_0 + hw_id; + break; + case LOWER: + index = LOW_INT_CLEAR_0 + hw_id; + break; + case CRITICAL: + /* No critical interrupts before v2 */ + return; + } + regmap_field_write(priv->rf[index], enable ? 0 : 1); +} + +static void tsens_set_interrupt_v2(struct tsens_priv *priv, u32 hw_id, + enum tsens_irq_type irq_type, bool enable) +{ + u32 index_mask = 0, index_clear = 0; + + /* + * To enable the interrupt flag for a sensor: + * - clear the mask bit + * To disable the interrupt flag for a sensor: + * - Mask further interrupts for this sensor + * - Write 1 followed by 0 to clear the interrupt + */ + switch (irq_type) { + case UPPER: + index_mask = UP_INT_MASK_0 + hw_id; + index_clear = UP_INT_CLEAR_0 + hw_id; + break; + case LOWER: + index_mask = LOW_INT_MASK_0 + hw_id; + index_clear = LOW_INT_CLEAR_0 + hw_id; + break; + case CRITICAL: + index_mask = CRIT_INT_MASK_0 + hw_id; + index_clear = CRIT_INT_CLEAR_0 + hw_id; + break; + } + + if (enable) { + regmap_field_write(priv->rf[index_mask], 0); + } else { + regmap_field_write(priv->rf[index_mask], 1); + regmap_field_write(priv->rf[index_clear], 1); + regmap_field_write(priv->rf[index_clear], 0); + } +} + +/** + * tsens_set_interrupt - Set state of an interrupt + * @priv: Pointer to tsens controller private data + * @hw_id: Hardware ID aka. sensor number + * @irq_type: irq_type from enum tsens_irq_type + * @enable: false = disable, true = enable + * + * Call IP-specific function to set state of an interrupt + * + * Return: void + */ +static void tsens_set_interrupt(struct tsens_priv *priv, u32 hw_id, + enum tsens_irq_type irq_type, bool enable) +{ + dev_dbg(priv->dev, "[%u] %s: %s -> %s\n", hw_id, __func__, + irq_type ? ((irq_type == 1) ? "UP" : "CRITICAL") : "LOW", + enable ? "en" : "dis"); + if (tsens_version(priv) > VER_1_X) + tsens_set_interrupt_v2(priv, hw_id, irq_type, enable); + else + tsens_set_interrupt_v1(priv, hw_id, irq_type, enable); +} + +/** + * tsens_threshold_violated - Check if a sensor temperature violated a preset threshold + * @priv: Pointer to tsens controller private data + * @hw_id: Hardware ID aka. sensor number + * @d: Pointer to irq state data + * + * Return: 0 if threshold was not violated, 1 if it was violated and negative + * errno in case of errors + */ +static int tsens_threshold_violated(struct tsens_priv *priv, u32 hw_id, + struct tsens_irq_data *d) +{ + int ret; + + ret = regmap_field_read(priv->rf[UPPER_STATUS_0 + hw_id], &d->up_viol); + if (ret) + return ret; + ret = regmap_field_read(priv->rf[LOWER_STATUS_0 + hw_id], &d->low_viol); + if (ret) + return ret; + + if (priv->feat->crit_int) { + ret = regmap_field_read(priv->rf[CRITICAL_STATUS_0 + hw_id], + &d->crit_viol); + if (ret) + return ret; + } + + if (d->up_viol || d->low_viol || d->crit_viol) + return 1; + + return 0; +} + +static int tsens_read_irq_state(struct tsens_priv *priv, u32 hw_id, + const struct tsens_sensor *s, + struct tsens_irq_data *d) +{ + int ret; + + ret = regmap_field_read(priv->rf[UP_INT_CLEAR_0 + hw_id], &d->up_irq_clear); + if (ret) + return ret; + ret = regmap_field_read(priv->rf[LOW_INT_CLEAR_0 + hw_id], &d->low_irq_clear); + if (ret) + return ret; + if (tsens_version(priv) > VER_1_X) { + ret = regmap_field_read(priv->rf[UP_INT_MASK_0 + hw_id], &d->up_irq_mask); + if (ret) + return ret; + ret = regmap_field_read(priv->rf[LOW_INT_MASK_0 + hw_id], &d->low_irq_mask); + if (ret) + return ret; + ret = regmap_field_read(priv->rf[CRIT_INT_CLEAR_0 + hw_id], + &d->crit_irq_clear); + if (ret) + return ret; + ret = regmap_field_read(priv->rf[CRIT_INT_MASK_0 + hw_id], + &d->crit_irq_mask); + if (ret) + return ret; + + d->crit_thresh = tsens_hw_to_mC(s, CRIT_THRESH_0 + hw_id); + } else { + /* No mask register on older TSENS */ + d->up_irq_mask = 0; + d->low_irq_mask = 0; + d->crit_irq_clear = 0; + d->crit_irq_mask = 0; + d->crit_thresh = 0; + } + + d->up_thresh = tsens_hw_to_mC(s, UP_THRESH_0 + hw_id); + d->low_thresh = tsens_hw_to_mC(s, LOW_THRESH_0 + hw_id); + + dev_dbg(priv->dev, "[%u] %s%s: status(%u|%u|%u) | clr(%u|%u|%u) | mask(%u|%u|%u)\n", + hw_id, __func__, + (d->up_viol || d->low_viol || d->crit_viol) ? "(V)" : "", + d->low_viol, d->up_viol, d->crit_viol, + d->low_irq_clear, d->up_irq_clear, d->crit_irq_clear, + d->low_irq_mask, d->up_irq_mask, d->crit_irq_mask); + dev_dbg(priv->dev, "[%u] %s%s: thresh: (%d:%d:%d)\n", hw_id, __func__, + (d->up_viol || d->low_viol || d->crit_viol) ? "(V)" : "", + d->low_thresh, d->up_thresh, d->crit_thresh); + + return 0; +} + +static inline u32 masked_irq(u32 hw_id, u32 mask, enum tsens_ver ver) +{ + if (ver > VER_1_X) + return mask & (1 << hw_id); + + /* v1, v0.1 don't have a irq mask register */ + return 0; +} + +/** + * tsens_critical_irq_thread() - Threaded handler for critical interrupts + * @irq: irq number + * @data: tsens controller private data + * + * Check FSM watchdog bark status and clear if needed. + * Check all sensors to find ones that violated their critical threshold limits. + * Clear and then re-enable the interrupt. + * + * The level-triggered interrupt might deassert if the temperature returned to + * within the threshold limits by the time the handler got scheduled. We + * consider the irq to have been handled in that case. + * + * Return: IRQ_HANDLED + */ +irqreturn_t tsens_critical_irq_thread(int irq, void *data) +{ + struct tsens_priv *priv = data; + struct tsens_irq_data d; + int temp, ret, i; + u32 wdog_status, wdog_count; + + if (priv->feat->has_watchdog) { + ret = regmap_field_read(priv->rf[WDOG_BARK_STATUS], + &wdog_status); + if (ret) + return ret; + + if (wdog_status) { + /* Clear WDOG interrupt */ + regmap_field_write(priv->rf[WDOG_BARK_CLEAR], 1); + regmap_field_write(priv->rf[WDOG_BARK_CLEAR], 0); + ret = regmap_field_read(priv->rf[WDOG_BARK_COUNT], + &wdog_count); + if (ret) + return ret; + if (wdog_count) + dev_dbg(priv->dev, "%s: watchdog count: %d\n", + __func__, wdog_count); + + /* Fall through to handle critical interrupts if any */ + } + } + + for (i = 0; i < priv->num_sensors; i++) { + const struct tsens_sensor *s = &priv->sensor[i]; + u32 hw_id = s->hw_id; + + if (IS_ERR(s->tzd)) + continue; + if (!tsens_threshold_violated(priv, hw_id, &d)) + continue; + ret = get_temp_tsens_valid(s, &temp); + if (ret) { + dev_err(priv->dev, "[%u] %s: error reading sensor\n", + hw_id, __func__); + continue; + } + + tsens_read_irq_state(priv, hw_id, s, &d); + if (d.crit_viol && + !masked_irq(hw_id, d.crit_irq_mask, tsens_version(priv))) { + /* Mask critical interrupts, unused on Linux */ + tsens_set_interrupt(priv, hw_id, CRITICAL, false); + } + } + + return IRQ_HANDLED; +} + +/** + * tsens_irq_thread - Threaded interrupt handler for uplow interrupts + * @irq: irq number + * @data: tsens controller private data + * + * Check all sensors to find ones that violated their threshold limits. If the + * temperature is still outside the limits, call thermal_zone_device_update() to + * update the thresholds, else re-enable the interrupts. + * + * The level-triggered interrupt might deassert if the temperature returned to + * within the threshold limits by the time the handler got scheduled. We + * consider the irq to have been handled in that case. + * + * Return: IRQ_HANDLED + */ +irqreturn_t tsens_irq_thread(int irq, void *data) +{ + struct tsens_priv *priv = data; + struct tsens_irq_data d; + bool enable = true, disable = false; + unsigned long flags; + int temp, ret, i; + + for (i = 0; i < priv->num_sensors; i++) { + bool trigger = false; + const struct tsens_sensor *s = &priv->sensor[i]; + u32 hw_id = s->hw_id; + + if (IS_ERR(s->tzd)) + continue; + if (!tsens_threshold_violated(priv, hw_id, &d)) + continue; + ret = get_temp_tsens_valid(s, &temp); + if (ret) { + dev_err(priv->dev, "[%u] %s: error reading sensor\n", + hw_id, __func__); + continue; + } + + spin_lock_irqsave(&priv->ul_lock, flags); + + tsens_read_irq_state(priv, hw_id, s, &d); + + if (d.up_viol && + !masked_irq(hw_id, d.up_irq_mask, tsens_version(priv))) { + tsens_set_interrupt(priv, hw_id, UPPER, disable); + if (d.up_thresh > temp) { + dev_dbg(priv->dev, "[%u] %s: re-arm upper\n", + hw_id, __func__); + tsens_set_interrupt(priv, hw_id, UPPER, enable); + } else { + trigger = true; + /* Keep irq masked */ + } + } else if (d.low_viol && + !masked_irq(hw_id, d.low_irq_mask, tsens_version(priv))) { + tsens_set_interrupt(priv, hw_id, LOWER, disable); + if (d.low_thresh < temp) { + dev_dbg(priv->dev, "[%u] %s: re-arm low\n", + hw_id, __func__); + tsens_set_interrupt(priv, hw_id, LOWER, enable); + } else { + trigger = true; + /* Keep irq masked */ + } + } + + spin_unlock_irqrestore(&priv->ul_lock, flags); + + if (trigger) { + dev_dbg(priv->dev, "[%u] %s: TZ update trigger (%d mC)\n", + hw_id, __func__, temp); + thermal_zone_device_update(s->tzd, + THERMAL_EVENT_UNSPECIFIED); + } else { + dev_dbg(priv->dev, "[%u] %s: no violation: %d\n", + hw_id, __func__, temp); + } + } + + return IRQ_HANDLED; +} + +int tsens_set_trips(void *_sensor, int low, int high) +{ + struct tsens_sensor *s = _sensor; + struct tsens_priv *priv = s->priv; + struct device *dev = priv->dev; + struct tsens_irq_data d; + unsigned long flags; + int high_val, low_val, cl_high, cl_low; + u32 hw_id = s->hw_id; + + dev_dbg(dev, "[%u] %s: proposed thresholds: (%d:%d)\n", + hw_id, __func__, low, high); + + cl_high = clamp_val(high, -40000, 120000); + cl_low = clamp_val(low, -40000, 120000); + + high_val = tsens_mC_to_hw(s, cl_high); + low_val = tsens_mC_to_hw(s, cl_low); + + spin_lock_irqsave(&priv->ul_lock, flags); + + tsens_read_irq_state(priv, hw_id, s, &d); + + /* Write the new thresholds and clear the status */ + regmap_field_write(priv->rf[LOW_THRESH_0 + hw_id], low_val); + regmap_field_write(priv->rf[UP_THRESH_0 + hw_id], high_val); + tsens_set_interrupt(priv, hw_id, LOWER, true); + tsens_set_interrupt(priv, hw_id, UPPER, true); + + spin_unlock_irqrestore(&priv->ul_lock, flags); + + dev_dbg(dev, "[%u] %s: (%d:%d)->(%d:%d)\n", + hw_id, __func__, d.low_thresh, d.up_thresh, cl_low, cl_high); + + return 0; +} + +int tsens_enable_irq(struct tsens_priv *priv) +{ + int ret; + int val = tsens_version(priv) > VER_1_X ? 7 : 1; + + ret = regmap_field_write(priv->rf[INT_EN], val); + if (ret < 0) + dev_err(priv->dev, "%s: failed to enable interrupts\n", + __func__); + + return ret; +} + +void tsens_disable_irq(struct tsens_priv *priv) +{ + regmap_field_write(priv->rf[INT_EN], 0); +} + +int get_temp_tsens_valid(const struct tsens_sensor *s, int *temp) +{ + struct tsens_priv *priv = s->priv; + int hw_id = s->hw_id; + u32 temp_idx = LAST_TEMP_0 + hw_id; + u32 valid_idx = VALID_0 + hw_id; + u32 valid; + int ret; + + ret = regmap_field_read(priv->rf[valid_idx], &valid); + if (ret) + return ret; + while (!valid) { + /* Valid bit is 0 for 6 AHB clock cycles. + * At 19.2MHz, 1 AHB clock is ~60ns. + * We should enter this loop very, very rarely. + */ + ndelay(400); + ret = regmap_field_read(priv->rf[valid_idx], &valid); + if (ret) + return ret; + } + + /* Valid bit is set, OK to read the temperature */ + *temp = tsens_hw_to_mC(s, temp_idx); + + return 0; +} + +int get_temp_common(const struct tsens_sensor *s, int *temp) +{ + struct tsens_priv *priv = s->priv; + int hw_id = s->hw_id; + int last_temp = 0, ret; + + ret = regmap_field_read(priv->rf[LAST_TEMP_0 + hw_id], &last_temp); + if (ret) + return ret; + + *temp = code_to_degc(last_temp, s) * 1000; + + return 0; +} + +#ifdef CONFIG_DEBUG_FS +static int dbg_sensors_show(struct seq_file *s, void *data) +{ + struct platform_device *pdev = s->private; + struct tsens_priv *priv = platform_get_drvdata(pdev); + int i; + + seq_printf(s, "max: %2d\nnum: %2d\n\n", + priv->feat->max_sensors, priv->num_sensors); + + seq_puts(s, " id slope offset\n--------------------------\n"); + for (i = 0; i < priv->num_sensors; i++) { + seq_printf(s, "%8d %8d %8d\n", priv->sensor[i].hw_id, + priv->sensor[i].slope, priv->sensor[i].offset); + } + + return 0; +} + +static int dbg_version_show(struct seq_file *s, void *data) +{ + struct platform_device *pdev = s->private; + struct tsens_priv *priv = platform_get_drvdata(pdev); + u32 maj_ver, min_ver, step_ver; + int ret; + + if (tsens_version(priv) > VER_0_1) { + ret = regmap_field_read(priv->rf[VER_MAJOR], &maj_ver); + if (ret) + return ret; + ret = regmap_field_read(priv->rf[VER_MINOR], &min_ver); + if (ret) + return ret; + ret = regmap_field_read(priv->rf[VER_STEP], &step_ver); + if (ret) + return ret; + seq_printf(s, "%d.%d.%d\n", maj_ver, min_ver, step_ver); + } else { + seq_puts(s, "0.1.0\n"); + } + + return 0; +} + +DEFINE_SHOW_ATTRIBUTE(dbg_version); +DEFINE_SHOW_ATTRIBUTE(dbg_sensors); + +static void tsens_debug_init(struct platform_device *pdev) +{ + struct tsens_priv *priv = platform_get_drvdata(pdev); + struct dentry *root, *file; + + root = debugfs_lookup("tsens", NULL); + if (!root) + priv->debug_root = debugfs_create_dir("tsens", NULL); + else + priv->debug_root = root; + + file = debugfs_lookup("version", priv->debug_root); + if (!file) + debugfs_create_file("version", 0444, priv->debug_root, + pdev, &dbg_version_fops); + + /* A directory for each instance of the TSENS IP */ + priv->debug = debugfs_create_dir(dev_name(&pdev->dev), priv->debug_root); + debugfs_create_file("sensors", 0444, priv->debug, pdev, &dbg_sensors_fops); +} +#else +static inline void tsens_debug_init(struct platform_device *pdev) {} +#endif + +static const struct regmap_config tsens_config = { + .name = "tm", + .reg_bits = 32, + .val_bits = 32, + .reg_stride = 4, +}; + +static const struct regmap_config tsens_srot_config = { + .name = "srot", + .reg_bits = 32, + .val_bits = 32, + .reg_stride = 4, +}; + +int __init init_common(struct tsens_priv *priv) +{ + void __iomem *tm_base, *srot_base; + struct device *dev = priv->dev; + u32 ver_minor; + struct resource *res; + u32 enabled; + int ret, i, j; + struct platform_device *op = of_find_device_by_node(priv->dev->of_node); + + if (!op) + return -EINVAL; + + if (op->num_resources > 1) { + /* DT with separate SROT and TM address space */ + priv->tm_offset = 0; + res = platform_get_resource(op, IORESOURCE_MEM, 1); + srot_base = devm_ioremap_resource(dev, res); + if (IS_ERR(srot_base)) { + ret = PTR_ERR(srot_base); + goto err_put_device; + } + + priv->srot_map = devm_regmap_init_mmio(dev, srot_base, + &tsens_srot_config); + if (IS_ERR(priv->srot_map)) { + ret = PTR_ERR(priv->srot_map); + goto err_put_device; + } + } else { + /* old DTs where SROT and TM were in a contiguous 2K block */ + priv->tm_offset = 0x1000; + } + + res = platform_get_resource(op, IORESOURCE_MEM, 0); + tm_base = devm_ioremap_resource(dev, res); + if (IS_ERR(tm_base)) { + ret = PTR_ERR(tm_base); + goto err_put_device; + } + + priv->tm_map = devm_regmap_init_mmio(dev, tm_base, &tsens_config); + if (IS_ERR(priv->tm_map)) { + ret = PTR_ERR(priv->tm_map); + goto err_put_device; + } + + if (tsens_version(priv) > VER_0_1) { + for (i = VER_MAJOR; i <= VER_STEP; i++) { + priv->rf[i] = devm_regmap_field_alloc(dev, priv->srot_map, + priv->fields[i]); + if (IS_ERR(priv->rf[i])) + return PTR_ERR(priv->rf[i]); + } + ret = regmap_field_read(priv->rf[VER_MINOR], &ver_minor); + if (ret) + goto err_put_device; + } + + priv->rf[TSENS_EN] = devm_regmap_field_alloc(dev, priv->srot_map, + priv->fields[TSENS_EN]); + if (IS_ERR(priv->rf[TSENS_EN])) { + ret = PTR_ERR(priv->rf[TSENS_EN]); + goto err_put_device; + } + ret = regmap_field_read(priv->rf[TSENS_EN], &enabled); + if (ret) + goto err_put_device; + if (!enabled) { + dev_err(dev, "%s: device not enabled\n", __func__); + ret = -ENODEV; + goto err_put_device; + } + + priv->rf[SENSOR_EN] = devm_regmap_field_alloc(dev, priv->srot_map, + priv->fields[SENSOR_EN]); + if (IS_ERR(priv->rf[SENSOR_EN])) { + ret = PTR_ERR(priv->rf[SENSOR_EN]); + goto err_put_device; + } + priv->rf[INT_EN] = devm_regmap_field_alloc(dev, priv->tm_map, + priv->fields[INT_EN]); + if (IS_ERR(priv->rf[INT_EN])) { + ret = PTR_ERR(priv->rf[INT_EN]); + goto err_put_device; + } + + /* This loop might need changes if enum regfield_ids is reordered */ + for (j = LAST_TEMP_0; j <= UP_THRESH_15; j += 16) { + for (i = 0; i < priv->feat->max_sensors; i++) { + int idx = j + i; + + priv->rf[idx] = devm_regmap_field_alloc(dev, + priv->tm_map, + priv->fields[idx]); + if (IS_ERR(priv->rf[idx])) { + ret = PTR_ERR(priv->rf[idx]); + goto err_put_device; + } + } + } + + if (priv->feat->crit_int) { + /* Loop might need changes if enum regfield_ids is reordered */ + for (j = CRITICAL_STATUS_0; j <= CRIT_THRESH_15; j += 16) { + for (i = 0; i < priv->feat->max_sensors; i++) { + int idx = j + i; + + priv->rf[idx] = + devm_regmap_field_alloc(dev, + priv->tm_map, + priv->fields[idx]); + if (IS_ERR(priv->rf[idx])) { + ret = PTR_ERR(priv->rf[idx]); + goto err_put_device; + } + } + } + } + + if (tsens_version(priv) > VER_1_X && ver_minor > 2) { + /* Watchdog is present only on v2.3+ */ + priv->feat->has_watchdog = 1; + for (i = WDOG_BARK_STATUS; i <= CC_MON_MASK; i++) { + priv->rf[i] = devm_regmap_field_alloc(dev, priv->tm_map, + priv->fields[i]); + if (IS_ERR(priv->rf[i])) { + ret = PTR_ERR(priv->rf[i]); + goto err_put_device; + } + } + /* + * Watchdog is already enabled, unmask the bark. + * Disable cycle completion monitoring + */ + regmap_field_write(priv->rf[WDOG_BARK_MASK], 0); + regmap_field_write(priv->rf[CC_MON_MASK], 1); + } + + spin_lock_init(&priv->ul_lock); + tsens_enable_irq(priv); + tsens_debug_init(op); + +err_put_device: + put_device(&op->dev); + return ret; +} + static int tsens_get_temp(void *data, int *temp) { struct tsens_sensor *s = data; diff --git a/drivers/thermal/qcom/tsens.h b/drivers/thermal/qcom/tsens.h index 502acf0e68285..59d01162c66af 100644 --- a/drivers/thermal/qcom/tsens.h +++ b/drivers/thermal/qcom/tsens.h @@ -580,11 +580,6 @@ void compute_intercept_slope(struct tsens_priv *priv, u32 *pt1, u32 *pt2, u32 mo int init_common(struct tsens_priv *priv); int get_temp_tsens_valid(const struct tsens_sensor *s, int *temp); int get_temp_common(const struct tsens_sensor *s, int *temp); -int tsens_enable_irq(struct tsens_priv *priv); -void tsens_disable_irq(struct tsens_priv *priv); -int tsens_set_trips(void *_sensor, int low, int high); -irqreturn_t tsens_irq_thread(int irq, void *data); -irqreturn_t tsens_critical_irq_thread(int irq, void *data); /* TSENS target */ extern struct tsens_plat_data data_8960; -- 2.20.1