// SPDX-License-Identifier: GPL-2.0-or-later /* * Copyright (C) 2015 Zodiac Inflight Innovations * * Author: Martyn Welch <[email protected]> * * Based on twl4030_wdt.c by Timo Kokkonen <timo.t.kokkonen at nokia.com>: * * Copyright (C) Nokia Corporation */ #include <linux/delay.h> #include <linux/i2c.h> #include <linux/ihex.h> #include <linux/firmware.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/slab.h> #include <linux/sysfs.h> #include <linux/types.h> #include <linux/watchdog.h> #include <asm/unaligned.h> #define ZIIRAVE_TIMEOUT_MIN … #define ZIIRAVE_TIMEOUT_MAX … #define ZIIRAVE_TIMEOUT_DEFAULT … #define ZIIRAVE_PING_VALUE … #define ZIIRAVE_STATE_INITIAL … #define ZIIRAVE_STATE_OFF … #define ZIIRAVE_STATE_ON … #define ZIIRAVE_FW_NAME … static char *ziirave_reasons[] = …; #define ZIIRAVE_WDT_FIRM_VER_MAJOR … #define ZIIRAVE_WDT_BOOT_VER_MAJOR … #define ZIIRAVE_WDT_RESET_REASON … #define ZIIRAVE_WDT_STATE … #define ZIIRAVE_WDT_TIMEOUT … #define ZIIRAVE_WDT_TIME_LEFT … #define ZIIRAVE_WDT_PING … #define ZIIRAVE_WDT_RESET_DURATION … #define ZIIRAVE_FIRM_PKT_TOTAL_SIZE … #define ZIIRAVE_FIRM_PKT_DATA_SIZE … #define ZIIRAVE_FIRM_FLASH_MEMORY_START … #define ZIIRAVE_FIRM_FLASH_MEMORY_END … #define ZIIRAVE_FIRM_PAGE_SIZE … /* Received and ready for next Download packet. */ #define ZIIRAVE_FIRM_DOWNLOAD_ACK … /* Firmware commands */ #define ZIIRAVE_CMD_DOWNLOAD_START … #define ZIIRAVE_CMD_DOWNLOAD_END … #define ZIIRAVE_CMD_DOWNLOAD_SET_READ_ADDR … #define ZIIRAVE_CMD_DOWNLOAD_READ_BYTE … #define ZIIRAVE_CMD_RESET_PROCESSOR … #define ZIIRAVE_CMD_JUMP_TO_BOOTLOADER … #define ZIIRAVE_CMD_DOWNLOAD_PACKET … #define ZIIRAVE_CMD_JUMP_TO_BOOTLOADER_MAGIC … #define ZIIRAVE_CMD_RESET_PROCESSOR_MAGIC … struct ziirave_wdt_rev { … }; struct ziirave_wdt_data { … }; static int wdt_timeout; module_param(wdt_timeout, int, 0); MODULE_PARM_DESC(…) …; static int reset_duration; module_param(reset_duration, int, 0); MODULE_PARM_DESC(…) …; static bool nowayout = … WATCHDOG_NOWAYOUT; module_param(nowayout, bool, 0); MODULE_PARM_DESC(…) …; static int ziirave_wdt_revision(struct i2c_client *client, struct ziirave_wdt_rev *rev, u8 command) { … } static int ziirave_wdt_set_state(struct watchdog_device *wdd, int state) { … } static int ziirave_wdt_start(struct watchdog_device *wdd) { … } static int ziirave_wdt_stop(struct watchdog_device *wdd) { … } static int ziirave_wdt_ping(struct watchdog_device *wdd) { … } static int ziirave_wdt_set_timeout(struct watchdog_device *wdd, unsigned int timeout) { … } static unsigned int ziirave_wdt_get_timeleft(struct watchdog_device *wdd) { … } static int ziirave_firm_read_ack(struct watchdog_device *wdd) { … } static int ziirave_firm_set_read_addr(struct watchdog_device *wdd, u32 addr) { … } static bool ziirave_firm_addr_readonly(u32 addr) { … } /* * ziirave_firm_write_pkt() - Build and write a firmware packet * * A packet to send to the firmware is composed by following bytes: * Length | Addr0 | Addr1 | Data0 .. Data15 | Checksum | * Where, * Length: A data byte containing the length of the data. * Addr0: Low byte of the address. * Addr1: High byte of the address. * Data0 .. Data15: Array of 16 bytes of data. * Checksum: Checksum byte to verify data integrity. */ static int __ziirave_firm_write_pkt(struct watchdog_device *wdd, u32 addr, const u8 *data, u8 len) { … } static int ziirave_firm_write_pkt(struct watchdog_device *wdd, u32 addr, const u8 *data, u8 len) { … } static int ziirave_firm_verify(struct watchdog_device *wdd, const struct firmware *fw) { … } static int ziirave_firm_upload(struct watchdog_device *wdd, const struct firmware *fw) { … } static const struct watchdog_info ziirave_wdt_info = …; static const struct watchdog_ops ziirave_wdt_ops = …; static ssize_t ziirave_wdt_sysfs_show_firm(struct device *dev, struct device_attribute *attr, char *buf) { … } static DEVICE_ATTR(firmware_version, S_IRUGO, ziirave_wdt_sysfs_show_firm, NULL); static ssize_t ziirave_wdt_sysfs_show_boot(struct device *dev, struct device_attribute *attr, char *buf) { … } static DEVICE_ATTR(bootloader_version, S_IRUGO, ziirave_wdt_sysfs_show_boot, NULL); static ssize_t ziirave_wdt_sysfs_show_reason(struct device *dev, struct device_attribute *attr, char *buf) { … } static DEVICE_ATTR(reset_reason, S_IRUGO, ziirave_wdt_sysfs_show_reason, NULL); static ssize_t ziirave_wdt_sysfs_store_firm(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static DEVICE_ATTR(update_firmware, S_IWUSR, NULL, ziirave_wdt_sysfs_store_firm); static struct attribute *ziirave_wdt_attrs[] = …; ATTRIBUTE_GROUPS(…); static int ziirave_wdt_init_duration(struct i2c_client *client) { … } static int ziirave_wdt_probe(struct i2c_client *client) { … } static void ziirave_wdt_remove(struct i2c_client *client) { … } static const struct i2c_device_id ziirave_wdt_id[] = …; MODULE_DEVICE_TABLE(i2c, ziirave_wdt_id); static const struct of_device_id zrv_wdt_of_match[] = …; MODULE_DEVICE_TABLE(of, zrv_wdt_of_match); static struct i2c_driver ziirave_wdt_driver = …; module_i2c_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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