// SPDX-License-Identifier: GPL-2.0 // Copyright (C) 2019 Spreadtrum Communications Inc. #include <linux/clk.h> #include <linux/delay.h> #include <linux/hwspinlock.h> #include <linux/io.h> #include <linux/module.h> #include <linux/nvmem-provider.h> #include <linux/of.h> #include <linux/platform_device.h> #define SPRD_EFUSE_ENABLE … #define SPRD_EFUSE_ERR_FLAG … #define SPRD_EFUSE_ERR_CLR … #define SPRD_EFUSE_MAGIC_NUM … #define SPRD_EFUSE_FW_CFG … #define SPRD_EFUSE_PW_SWT … #define SPRD_EFUSE_MEM(val) … #define SPRD_EFUSE_VDD_EN … #define SPRD_EFUSE_AUTO_CHECK_EN … #define SPRD_EFUSE_DOUBLE_EN … #define SPRD_EFUSE_MARGIN_RD_EN … #define SPRD_EFUSE_LOCK_WR_EN … #define SPRD_EFUSE_ERR_CLR_MASK … #define SPRD_EFUSE_ENK1_ON … #define SPRD_EFUSE_ENK2_ON … #define SPRD_EFUSE_PROG_EN … #define SPRD_EFUSE_MAGIC_NUMBER … /* Block width (bytes) definitions */ #define SPRD_EFUSE_BLOCK_WIDTH … /* * The Spreadtrum AP efuse contains 2 parts: normal efuse and secure efuse, * and we can only access the normal efuse in kernel. So define the normal * block offset index and normal block numbers. */ #define SPRD_EFUSE_NORMAL_BLOCK_NUMS … #define SPRD_EFUSE_NORMAL_BLOCK_OFFSET … /* Timeout (ms) for the trylock of hardware spinlocks */ #define SPRD_EFUSE_HWLOCK_TIMEOUT … /* * Since different Spreadtrum SoC chip can have different normal block numbers * and offset. And some SoC can support block double feature, which means * when reading or writing data to efuse memory, the controller can save double * data in case one data become incorrect after a long period. * * Thus we should save them in the device data structure. */ struct sprd_efuse_variant_data { … }; struct sprd_efuse { … }; static const struct sprd_efuse_variant_data ums312_data = …; /* * On Spreadtrum platform, we have multi-subsystems will access the unique * efuse controller, so we need one hardware spinlock to synchronize between * the multiple subsystems. */ static int sprd_efuse_lock(struct sprd_efuse *efuse) { … } static void sprd_efuse_unlock(struct sprd_efuse *efuse) { … } static void sprd_efuse_set_prog_power(struct sprd_efuse *efuse, bool en) { … } static void sprd_efuse_set_read_power(struct sprd_efuse *efuse, bool en) { … } static void sprd_efuse_set_prog_lock(struct sprd_efuse *efuse, bool en) { … } static void sprd_efuse_set_auto_check(struct sprd_efuse *efuse, bool en) { … } static void sprd_efuse_set_data_double(struct sprd_efuse *efuse, bool en) { … } static void sprd_efuse_set_prog_en(struct sprd_efuse *efuse, bool en) { … } static int sprd_efuse_raw_prog(struct sprd_efuse *efuse, u32 blk, bool doub, bool lock, u32 *data) { … } static int sprd_efuse_raw_read(struct sprd_efuse *efuse, int blk, u32 *val, bool doub) { … } static int sprd_efuse_read(void *context, u32 offset, void *val, size_t bytes) { … } static int sprd_efuse_write(void *context, u32 offset, void *val, size_t bytes) { … } static int sprd_efuse_probe(struct platform_device *pdev) { … } static const struct of_device_id sprd_efuse_of_match[] = …; MODULE_DEVICE_TABLE(of, sprd_efuse_of_match); static struct platform_driver sprd_efuse_driver = …; module_platform_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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