// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (c) 2014-2018, The Linux Foundation. All rights reserved. * Copyright (C) 2021-2022 Linaro Ltd * Author: Krzysztof Kozlowski <[email protected]>, based on * previous work of Thara Gopinath and msm-4.9 downstream sources. */ #include <linux/err.h> #include <linux/interconnect.h> #include <linux/interrupt.h> #include <linux/io.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/of.h> #include <linux/platform_device.h> #include <linux/pm_opp.h> #include <linux/regmap.h> #include <linux/sizes.h> /* * The BWMON samples data throughput within 'sample_ms' time. With three * configurable thresholds (Low, Medium and High) gives four windows (called * zones) of current bandwidth: * * Zone 0: byte count < THRES_LO * Zone 1: THRES_LO < byte count < THRES_MED * Zone 2: THRES_MED < byte count < THRES_HIGH * Zone 3: THRES_HIGH < byte count * * Zones 0 and 2 are not used by this driver. */ /* Internal sampling clock frequency */ #define HW_TIMER_HZ … #define BWMON_V4_GLOBAL_IRQ_CLEAR … #define BWMON_V4_GLOBAL_IRQ_ENABLE … /* * All values here and further are matching regmap fields, so without absolute * register offsets. */ #define BWMON_V4_GLOBAL_IRQ_ENABLE_ENABLE … /* * Starting with SDM845, the BWMON4 register space has changed a bit: * the global registers were jammed into the beginning of the monitor region. * To keep the proper offsets, one would have to map <GLOBAL_BASE 0x200> and * <GLOBAL_BASE+0x100 0x300>, which is straight up wrong. * To facilitate for that, while allowing the older, arguably more proper * implementations to work, offset the global registers by -0x100 to avoid * having to map half of the global registers twice. */ #define BWMON_V4_845_OFFSET … #define BWMON_V4_GLOBAL_IRQ_CLEAR_845 … #define BWMON_V4_GLOBAL_IRQ_ENABLE_845 … #define BWMON_V4_IRQ_STATUS … #define BWMON_V4_IRQ_CLEAR … #define BWMON_V4_IRQ_ENABLE … #define BWMON_IRQ_ENABLE_MASK … #define BWMON_V5_IRQ_STATUS … #define BWMON_V5_IRQ_CLEAR … #define BWMON_V5_IRQ_ENABLE … #define BWMON_V4_ENABLE … #define BWMON_V5_ENABLE … #define BWMON_ENABLE_ENABLE … #define BWMON_V4_CLEAR … #define BWMON_V5_CLEAR … #define BWMON_CLEAR_CLEAR … #define BWMON_CLEAR_CLEAR_ALL … #define BWMON_V4_SAMPLE_WINDOW … #define BWMON_V5_SAMPLE_WINDOW … #define BWMON_V4_THRESHOLD_HIGH … #define BWMON_V4_THRESHOLD_MED … #define BWMON_V4_THRESHOLD_LOW … #define BWMON_V5_THRESHOLD_HIGH … #define BWMON_V5_THRESHOLD_MED … #define BWMON_V5_THRESHOLD_LOW … #define BWMON_V4_ZONE_ACTIONS … #define BWMON_V5_ZONE_ACTIONS … /* * Actions to perform on some zone 'z' when current zone hits the threshold: * Increment counter of zone 'z' */ #define BWMON_ZONE_ACTIONS_INCREMENT(z) … /* Clear counter of zone 'z' */ #define BWMON_ZONE_ACTIONS_CLEAR(z) … /* Zone 0 threshold hit: Clear zone count */ #define BWMON_ZONE_ACTIONS_ZONE0 … /* Zone 1 threshold hit: Increment zone count & clear lower zones */ #define BWMON_ZONE_ACTIONS_ZONE1 … /* Zone 2 threshold hit: Increment zone count & clear lower zones */ #define BWMON_ZONE_ACTIONS_ZONE2 … /* Zone 3 threshold hit: Increment zone count & clear lower zones */ #define BWMON_ZONE_ACTIONS_ZONE3 … /* * There is no clear documentation/explanation of BWMON_V4_THRESHOLD_COUNT * register. Based on observations, this is number of times one threshold has to * be reached, to trigger interrupt in given zone. * * 0xff are maximum values meant to ignore the zones 0 and 2. */ #define BWMON_V4_THRESHOLD_COUNT … #define BWMON_V5_THRESHOLD_COUNT … #define BWMON_THRESHOLD_COUNT_ZONE0_DEFAULT … #define BWMON_THRESHOLD_COUNT_ZONE2_DEFAULT … #define BWMON_V4_ZONE_MAX(zone) … #define BWMON_V5_ZONE_MAX(zone) … /* Quirks for specific BWMON types */ #define BWMON_HAS_GLOBAL_IRQ … #define BWMON_NEEDS_FORCE_CLEAR … enum bwmon_fields { … }; struct icc_bwmon_data { … }; struct icc_bwmon { … }; /* BWMON v4 */ static const struct reg_field msm8998_bwmon_reg_fields[] = …; static const struct regmap_range msm8998_bwmon_reg_noread_ranges[] = …; static const struct regmap_access_table msm8998_bwmon_reg_read_table = …; static const struct regmap_range msm8998_bwmon_reg_volatile_ranges[] = …; static const struct regmap_access_table msm8998_bwmon_reg_volatile_table = …; static const struct reg_field msm8998_bwmon_global_reg_fields[] = …; static const struct regmap_range msm8998_bwmon_global_reg_noread_ranges[] = …; static const struct regmap_access_table msm8998_bwmon_global_reg_read_table = …; /* * Fill the cache for non-readable registers only as rest does not really * matter and can be read from the device. */ static const struct reg_default msm8998_bwmon_reg_defaults[] = …; static const struct reg_default msm8998_bwmon_global_reg_defaults[] = …; static const struct regmap_config msm8998_bwmon_regmap_cfg = …; static const struct regmap_config msm8998_bwmon_global_regmap_cfg = …; static const struct reg_field sdm845_cpu_bwmon_reg_fields[] = …; static const struct regmap_range sdm845_cpu_bwmon_reg_noread_ranges[] = …; static const struct regmap_access_table sdm845_cpu_bwmon_reg_read_table = …; /* * Fill the cache for non-readable registers only as rest does not really * matter and can be read from the device. */ static const struct reg_default sdm845_cpu_bwmon_reg_defaults[] = …; static const struct regmap_config sdm845_cpu_bwmon_regmap_cfg = …; /* BWMON v5 */ static const struct reg_field sdm845_llcc_bwmon_reg_fields[] = …; static const struct regmap_range sdm845_llcc_bwmon_reg_noread_ranges[] = …; static const struct regmap_access_table sdm845_llcc_bwmon_reg_read_table = …; static const struct regmap_range sdm845_llcc_bwmon_reg_volatile_ranges[] = …; static const struct regmap_access_table sdm845_llcc_bwmon_reg_volatile_table = …; /* * Fill the cache for non-readable registers only as rest does not really * matter and can be read from the device. */ static const struct reg_default sdm845_llcc_bwmon_reg_defaults[] = …; static const struct regmap_config sdm845_llcc_bwmon_regmap_cfg = …; static void bwmon_clear_counters(struct icc_bwmon *bwmon, bool clear_all) { … } static void bwmon_clear_irq(struct icc_bwmon *bwmon) { … } static void bwmon_disable(struct icc_bwmon *bwmon) { … } static void bwmon_enable(struct icc_bwmon *bwmon, unsigned int irq_enable) { … } static unsigned int bwmon_kbps_to_count(struct icc_bwmon *bwmon, unsigned int kbps) { … } static void bwmon_set_threshold(struct icc_bwmon *bwmon, struct regmap_field *reg, unsigned int kbps) { … } static void bwmon_start(struct icc_bwmon *bwmon) { … } static irqreturn_t bwmon_intr(int irq, void *dev_id) { … } static irqreturn_t bwmon_intr_thread(int irq, void *dev_id) { … } static int bwmon_init_regmap(struct platform_device *pdev, struct icc_bwmon *bwmon) { … } static int bwmon_probe(struct platform_device *pdev) { … } static void bwmon_remove(struct platform_device *pdev) { … } static const struct icc_bwmon_data msm8998_bwmon_data = …; static const struct icc_bwmon_data sdm845_cpu_bwmon_data = …; static const struct icc_bwmon_data sdm845_llcc_bwmon_data = …; static const struct icc_bwmon_data sc7280_llcc_bwmon_data = …; static const struct of_device_id bwmon_of_match[] = …; MODULE_DEVICE_TABLE(of, bwmon_of_match); static struct platform_driver bwmon_driver = …; module_platform_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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