// SPDX-License-Identifier: GPL-2.0-only /* * w1_ds2805 - w1 family 0d (DS28E05) driver * * Copyright (c) 2016 Andrew Worsley [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/w1.h> #define W1_EEPROM_DS2805 … #define W1_F0D_EEPROM_SIZE … #define W1_F0D_PAGE_BITS … #define W1_F0D_PAGE_SIZE … #define W1_F0D_PAGE_MASK … #define W1_F0D_SCRATCH_BITS … #define W1_F0D_SCRATCH_SIZE … #define W1_F0D_SCRATCH_MASK … #define W1_F0D_READ_EEPROM … #define W1_F0D_WRITE_EEPROM … #define W1_F0D_RELEASE … #define W1_F0D_CS_OK … #define W1_F0D_TPROG_MS … #define W1_F0D_READ_RETRIES … #define W1_F0D_READ_MAXLEN … /* * 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_f0d_fix_count(loff_t off, size_t count, size_t size) { … } /* * Read a block from W1 ROM two times and compares the results. * If they are equal they are returned, otherwise the read * is repeated W1_F0D_READ_RETRIES times. * * count must not exceed W1_F0D_READ_MAXLEN. */ static int w1_f0d_readblock(struct w1_slave *sl, int off, int count, char *buf) { … } static ssize_t w1_f0d_read_bin(struct file *filp, struct kobject *kobj, struct bin_attribute *bin_attr, char *buf, loff_t off, size_t count) { … } /* * Writes to the scratchpad and reads it back for verification. * Then copies the scratchpad to EEPROM. * The data must be aligned at W1_F0D_SCRATCH_SIZE bytes and * must be W1_F0D_SCRATCH_SIZE bytes long. * The master must be locked. * * @param sl The slave structure * @param addr Address for the write * @param len length must be <= (W1_F0D_PAGE_SIZE - (addr & W1_F0D_PAGE_MASK)) * @param data The data to write * @return 0=Success -1=failure */ static int w1_f0d_write(struct w1_slave *sl, int addr, int len, const u8 *data) { … } static ssize_t w1_f0d_write_bin(struct file *filp, struct kobject *kobj, struct bin_attribute *bin_attr, char *buf, loff_t off, size_t count) { … } static struct bin_attribute w1_f0d_bin_attr = …; static int w1_f0d_add_slave(struct w1_slave *sl) { … } static void w1_f0d_remove_slave(struct w1_slave *sl) { … } static const struct w1_family_ops w1_f0d_fops = …; static struct w1_family w1_family_0d = …; module_w1_family(…); MODULE_LICENSE(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …;
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