// SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause /* * UCSI driver for STMicroelectronics STM32G0 Type-C PD controller * * Copyright (C) 2022, STMicroelectronics - All Rights Reserved * Author: Fabrice Gasnier <[email protected]>. */ #include <linux/delay.h> #include <linux/firmware.h> #include <linux/i2c.h> #include <linux/interrupt.h> #include <linux/module.h> #include <linux/platform_device.h> #include <linux/unaligned.h> #include "ucsi.h" /* STM32G0 I2C bootloader addr: 0b1010001x (See AN2606) */ #define STM32G0_I2C_BL_ADDR … /* STM32G0 I2C bootloader max data size */ #define STM32G0_I2C_BL_SZ … /* STM32 I2C bootloader commands (See AN4221) */ #define STM32_CMD_GVR … #define STM32_CMD_GVR_LEN … #define STM32_CMD_RM … #define STM32_CMD_WM … #define STM32_CMD_ADDR_LEN … #define STM32_CMD_ERASE … #define STM32_CMD_ERASE_SPECIAL_LEN … #define STM32_CMD_GLOBAL_MASS_ERASE … /* STM32 I2C bootloader answer status */ #define STM32G0_I2C_BL_ACK … #define STM32G0_I2C_BL_NACK … #define STM32G0_I2C_BL_BUSY … /* STM32G0 flash definitions */ #define STM32G0_USER_OPTION_BYTES … #define STM32G0_USER_OB_NBOOT0 … #define STM32G0_USER_OB_NBOOT_SEL … #define STM32G0_USER_OB_BOOT_MAIN … #define STM32G0_MAIN_MEM_ADDR … /* STM32 Firmware definitions: additional commands */ #define STM32G0_FW_GETVER … #define STM32G0_FW_GETVER_LEN … #define STM32G0_FW_RSTGOBL … #define STM32G0_FW_KEYWORD … /* ucsi_stm32g0_fw_info located at the end of the firmware */ struct ucsi_stm32g0_fw_info { … }; struct ucsi_stm32g0 { … }; /* * Bootloader commands helpers: * - send command (2 bytes) * - check ack * Then either: * - receive data * - receive data + check ack * - send data + check ack * These operations depends on the command and have various length. */ static int ucsi_stm32g0_bl_check_ack(struct ucsi *ucsi) { … } static int ucsi_stm32g0_bl_cmd_check_ack(struct ucsi *ucsi, unsigned int cmd, bool check_ack) { … } static int ucsi_stm32g0_bl_cmd(struct ucsi *ucsi, unsigned int cmd) { … } static int ucsi_stm32g0_bl_rcv_check_ack(struct ucsi *ucsi, void *data, size_t len, bool check_ack) { … } static int ucsi_stm32g0_bl_rcv(struct ucsi *ucsi, void *data, size_t len) { … } static int ucsi_stm32g0_bl_rcv_woack(struct ucsi *ucsi, void *data, size_t len) { … } static int ucsi_stm32g0_bl_send(struct ucsi *ucsi, void *data, size_t len) { … } /* Bootloader commands */ static int ucsi_stm32g0_bl_get_version(struct ucsi *ucsi, u8 *bl_version) { … } static int ucsi_stm32g0_bl_send_addr(struct ucsi *ucsi, u32 addr) { … } static int ucsi_stm32g0_bl_global_mass_erase(struct ucsi *ucsi) { … } static int ucsi_stm32g0_bl_write(struct ucsi *ucsi, u32 addr, const void *data, size_t len) { … } static int ucsi_stm32g0_bl_read(struct ucsi *ucsi, u32 addr, void *data, size_t len) { … } /* Firmware commands (the same address as the bootloader) */ static int ucsi_stm32g0_fw_cmd(struct ucsi *ucsi, unsigned int cmd) { … } static int ucsi_stm32g0_fw_rcv(struct ucsi *ucsi, void *data, size_t len) { … } /* UCSI ops */ static int ucsi_stm32g0_read(struct ucsi *ucsi, unsigned int offset, void *val, size_t len) { … } static int ucsi_stm32g0_read_version(struct ucsi *ucsi, u16 *version) { … } static int ucsi_stm32g0_read_cci(struct ucsi *ucsi, u32 *cci) { … } static int ucsi_stm32g0_read_message_in(struct ucsi *ucsi, void *val, size_t len) { … } static int ucsi_stm32g0_async_control(struct ucsi *ucsi, u64 command) { … } static irqreturn_t ucsi_stm32g0_irq_handler(int irq, void *data) { … } static const struct ucsi_operations ucsi_stm32g0_ops = …; static int ucsi_stm32g0_register(struct ucsi *ucsi) { … } static void ucsi_stm32g0_unregister(struct ucsi *ucsi) { … } static void ucsi_stm32g0_fw_cb(const struct firmware *fw, void *context) { … } static int ucsi_stm32g0_probe_bootloader(struct ucsi *ucsi) { … } static int ucsi_stm32g0_probe(struct i2c_client *client) { … } static void ucsi_stm32g0_remove(struct i2c_client *client) { … } static int ucsi_stm32g0_suspend(struct device *dev) { … } static int ucsi_stm32g0_resume(struct device *dev) { … } static DEFINE_SIMPLE_DEV_PM_OPS(ucsi_stm32g0_pm_ops, ucsi_stm32g0_suspend, ucsi_stm32g0_resume); static const struct of_device_id __maybe_unused ucsi_stm32g0_typec_of_match[] = …; MODULE_DEVICE_TABLE(of, ucsi_stm32g0_typec_of_match); static const struct i2c_device_id ucsi_stm32g0_typec_i2c_devid[] = …; MODULE_DEVICE_TABLE(i2c, ucsi_stm32g0_typec_i2c_devid); static struct i2c_driver ucsi_stm32g0_i2c_driver = …; module_i2c_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; MODULE_ALIAS(…) …;
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