// SPDX-License-Identifier: GPL-2.0-only // Copyright (C) 2016 Broadcom #include <linux/acpi.h> #include <linux/delay.h> #include <linux/device.h> #include <linux/io.h> #include <linux/module.h> #include <linux/nvmem-provider.h> #include <linux/of.h> #include <linux/platform_device.h> /* * # of tries for OTP Status. The time to execute a command varies. The slowest * commands are writes which also vary based on the # of bits turned on. Writing * 0xffffffff takes ~3800 us. */ #define OTPC_RETRIES … /* Sequence to enable OTP program */ #define OTPC_PROG_EN_SEQ … /* OTPC Commands */ #define OTPC_CMD_READ … #define OTPC_CMD_OTP_PROG_ENABLE … #define OTPC_CMD_OTP_PROG_DISABLE … #define OTPC_CMD_PROGRAM … /* OTPC Status Bits */ #define OTPC_STAT_CMD_DONE … #define OTPC_STAT_PROG_OK … /* OTPC register definition */ #define OTPC_MODE_REG_OFFSET … #define OTPC_MODE_REG_OTPC_MODE … #define OTPC_COMMAND_OFFSET … #define OTPC_COMMAND_COMMAND_WIDTH … #define OTPC_CMD_START_OFFSET … #define OTPC_CMD_START_START … #define OTPC_CPU_STATUS_OFFSET … #define OTPC_CPUADDR_REG_OFFSET … #define OTPC_CPUADDR_REG_OTPC_CPU_ADDRESS_WIDTH … #define OTPC_CPU_WRITE_REG_OFFSET … #define OTPC_CMD_MASK … #define OTPC_ADDR_MASK … struct otpc_map { … }; static struct otpc_map otp_map = …; static struct otpc_map otp_map_v2 = …; struct otpc_priv { … }; static inline void set_command(void __iomem *base, u32 command) { … } static inline void set_cpu_address(void __iomem *base, u32 addr) { … } static inline void set_start_bit(void __iomem *base) { … } static inline void reset_start_bit(void __iomem *base) { … } static inline void write_cpu_data(void __iomem *base, u32 value) { … } static int poll_cpu_status(void __iomem *base, u32 value) { … } static int enable_ocotp_program(void __iomem *base) { … } static int disable_ocotp_program(void __iomem *base) { … } static int bcm_otpc_read(void *context, unsigned int offset, void *val, size_t bytes) { … } static int bcm_otpc_write(void *context, unsigned int offset, void *val, size_t bytes) { … } static struct nvmem_config bcm_otpc_nvmem_config = …; static const struct of_device_id bcm_otpc_dt_ids[] = …; MODULE_DEVICE_TABLE(of, bcm_otpc_dt_ids); static const struct acpi_device_id bcm_otpc_acpi_ids[] __maybe_unused = …; MODULE_DEVICE_TABLE(acpi, bcm_otpc_acpi_ids); static int bcm_otpc_probe(struct platform_device *pdev) { … } static struct platform_driver bcm_otpc_driver = …; module_platform_driver(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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