// SPDX-License-Identifier: GPL-2.0-only /* * w1_ds2433.c - w1 family 23 (DS2433) & 43 (DS28EC20) eeprom driver * * Copyright (c) 2005 Ben Gardner <[email protected]> * Copyright (c) 2023 Marc Ferland <[email protected]> */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/device.h> #include <linux/types.h> #include <linux/delay.h> #include <linux/slab.h> #ifdef CONFIG_W1_SLAVE_DS2433_CRC #include <linux/crc16.h> #define CRC16_INIT … #define CRC16_VALID … #endif #include <linux/w1.h> #define W1_EEPROM_DS2433 … #define W1_EEPROM_DS28EC20 … #define W1_EEPROM_DS2433_SIZE … #define W1_EEPROM_DS28EC20_SIZE … #define W1_PAGE_SIZE … #define W1_PAGE_BITS … #define W1_PAGE_MASK … #define W1_VALIDCRC_MAX … #define W1_F23_READ_EEPROM … #define W1_F23_WRITE_SCRATCH … #define W1_F23_READ_SCRATCH … #define W1_F23_COPY_SCRATCH … struct ds2433_config { … }; static const struct ds2433_config config_f23 = …; static const struct ds2433_config config_f43 = …; struct w1_f23_data { … }; /* * Check the file size bounds and adjusts count as needed. * This would not be needed if the file size didn't reset to 0 after a write. */ static inline size_t w1_f23_fix_count(loff_t off, size_t count, size_t size) { … } #ifdef CONFIG_W1_SLAVE_DS2433_CRC static int w1_f23_refresh_block(struct w1_slave *sl, struct w1_f23_data *data, int block) { … } #endif /* CONFIG_W1_SLAVE_DS2433_CRC */ static ssize_t eeprom_read(struct file *filp, struct kobject *kobj, struct bin_attribute *bin_attr, char *buf, loff_t off, size_t count) { … } /** * w1_f23_write() - Writes to the scratchpad and reads it back for verification. * @sl: The slave structure * @addr: Address for the write * @len: length must be <= (W1_PAGE_SIZE - (addr & W1_PAGE_MASK)) * @data: The data to write * * Then copies the scratchpad to EEPROM. * The data must be on one page. * The master must be locked. * * Return: 0=Success, -1=failure */ static int w1_f23_write(struct w1_slave *sl, int addr, int len, const u8 *data) { … } static ssize_t eeprom_write(struct file *filp, struct kobject *kobj, struct bin_attribute *bin_attr, char *buf, loff_t off, size_t count) { … } static struct bin_attribute bin_attr_f23_eeprom = …; static struct bin_attribute bin_attr_f43_eeprom = …; static struct bin_attribute *w1_f23_bin_attributes[] = …; static const struct attribute_group w1_f23_group = …; static const struct attribute_group *w1_f23_groups[] = …; static struct bin_attribute *w1_f43_bin_attributes[] = …; static const struct attribute_group w1_f43_group = …; static const struct attribute_group *w1_f43_groups[] = …; static int w1_f23_add_slave(struct w1_slave *sl) { … } static void w1_f23_remove_slave(struct w1_slave *sl) { … } static const struct w1_family_ops w1_f23_fops = …; static const struct w1_family_ops w1_f43_fops = …; static struct w1_family w1_family_23 = …; static struct w1_family w1_family_43 = …; static int __init w1_ds2433_init(void) { … } static void __exit w1_ds2433_exit(void) { … } module_init(…) …; module_exit(w1_ds2433_exit); MODULE_AUTHOR(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; MODULE_ALIAS(…) …; MODULE_ALIAS(…) …;
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