// SPDX-License-Identifier: GPL-2.0 /* * SPI driver for Micrel/Kendin KS8995M and KSZ8864RMN ethernet switches * * Copyright (C) 2008 Gabor Juhos <juhosg at openwrt.org> * * This file was based on: drivers/spi/at25.c * Copyright (C) 2006 David Brownell */ #define pr_fmt(fmt) … #include <linux/types.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/delay.h> #include <linux/device.h> #include <linux/gpio/consumer.h> #include <linux/of.h> #include <linux/spi/spi.h> #define DRV_VERSION … #define DRV_DESC … /* ------------------------------------------------------------------------ */ #define KS8995_REG_ID0 … #define KS8995_REG_ID1 … #define KS8995_REG_GC0 … #define KS8995_REG_GC1 … #define KS8995_REG_GC2 … #define KS8995_REG_GC3 … #define KS8995_REG_GC4 … #define KS8995_REG_GC5 … #define KS8995_REG_GC6 … #define KS8995_REG_GC7 … #define KS8995_REG_GC8 … #define KS8995_REG_GC9 … #define KS8995_REG_PC(p, r) … #define KS8995_REG_PS(p, r) … #define KS8995_REG_TPC0 … #define KS8995_REG_TPC1 … #define KS8995_REG_TPC2 … #define KS8995_REG_TPC3 … #define KS8995_REG_TPC4 … #define KS8995_REG_TPC5 … #define KS8995_REG_TPC6 … #define KS8995_REG_TPC7 … #define KS8995_REG_MAC0 … #define KS8995_REG_MAC1 … #define KS8995_REG_MAC2 … #define KS8995_REG_MAC3 … #define KS8995_REG_MAC4 … #define KS8995_REG_MAC5 … #define KS8995_REG_IAC0 … #define KS8995_REG_IAC1 … #define KS8995_REG_IAD7 … #define KS8995_REG_IAD6 … #define KS8995_REG_IAD5 … #define KS8995_REG_IAD4 … #define KS8995_REG_IAD3 … #define KS8995_REG_IAD2 … #define KS8995_REG_IAD1 … #define KS8995_REG_IAD0 … #define KSZ8864_REG_ID1 … #define KS8995_REGS_SIZE … #define KSZ8864_REGS_SIZE … #define KSZ8795_REGS_SIZE … #define ID1_CHIPID_M … #define ID1_CHIPID_S … #define ID1_REVISION_M … #define ID1_REVISION_S … #define ID1_START_SW … #define FAMILY_KS8995 … #define FAMILY_KSZ8795 … #define CHIPID_M … #define KS8995_CHIP_ID … #define KSZ8864_CHIP_ID … #define KSZ8795_CHIP_ID … #define KS8995_CMD_WRITE … #define KS8995_CMD_READ … #define KS8995_RESET_DELAY … enum ks8995_chip_variant { … }; struct ks8995_chip_params { … }; static const struct ks8995_chip_params ks8995_chip[] = …; struct ks8995_switch { … }; static const struct spi_device_id ks8995_id[] = …; MODULE_DEVICE_TABLE(spi, ks8995_id); static const struct of_device_id ks8895_spi_of_match[] = …; MODULE_DEVICE_TABLE(of, ks8895_spi_of_match); static inline u8 get_chip_id(u8 val) { … } static inline u8 get_chip_rev(u8 val) { … } /* create_spi_cmd - create a chip specific SPI command header * @ks: pointer to switch instance * @cmd: SPI command for switch * @address: register address for command * * Different chip families use different bit pattern to address the switches * registers: * * KS8995: 8bit command + 8bit address * KSZ8795: 3bit command + 12bit address + 1bit TR (?) */ static inline __be16 create_spi_cmd(struct ks8995_switch *ks, int cmd, unsigned address) { … } /* ------------------------------------------------------------------------ */ static int ks8995_read(struct ks8995_switch *ks, char *buf, unsigned offset, size_t count) { … } static int ks8995_write(struct ks8995_switch *ks, char *buf, unsigned offset, size_t count) { … } static inline int ks8995_read_reg(struct ks8995_switch *ks, u8 addr, u8 *buf) { … } static inline int ks8995_write_reg(struct ks8995_switch *ks, u8 addr, u8 val) { … } /* ------------------------------------------------------------------------ */ static int ks8995_stop(struct ks8995_switch *ks) { … } static int ks8995_start(struct ks8995_switch *ks) { … } static int ks8995_reset(struct ks8995_switch *ks) { … } static ssize_t ks8995_registers_read(struct file *filp, struct kobject *kobj, struct bin_attribute *bin_attr, char *buf, loff_t off, size_t count) { … } static ssize_t ks8995_registers_write(struct file *filp, struct kobject *kobj, struct bin_attribute *bin_attr, char *buf, loff_t off, size_t count) { … } /* ks8995_get_revision - get chip revision * @ks: pointer to switch instance * * Verify chip family and id and get chip revision. */ static int ks8995_get_revision(struct ks8995_switch *ks) { … } static const struct bin_attribute ks8995_registers_attr = …; /* ------------------------------------------------------------------------ */ static int ks8995_probe(struct spi_device *spi) { … } static void ks8995_remove(struct spi_device *spi) { … } /* ------------------------------------------------------------------------ */ static struct spi_driver ks8995_driver = …; module_spi_driver(…) …; MODULE_DESCRIPTION(…); MODULE_VERSION(…); MODULE_AUTHOR(…) …; MODULE_LICENSE(…) …;
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