// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 /* Copyright (c) 2016-2018 Mellanox Technologies. All rights reserved */ #include <linux/err.h> #include <linux/i2c.h> #include <linux/init.h> #include <linux/jiffies.h> #include <linux/kernel.h> #include <linux/mutex.h> #include <linux/module.h> #include <linux/mod_devicetable.h> #include <linux/platform_data/mlxreg.h> #include <linux/slab.h> #include "cmd.h" #include "core.h" #include "i2c.h" #include "resources.h" #define MLXSW_I2C_CIR2_BASE … #define MLXSW_I2C_CIR_STATUS_OFF … #define MLXSW_I2C_CIR2_OFF_STATUS … #define MLXSW_I2C_OPMOD_SHIFT … #define MLXSW_I2C_EVENT_BIT_SHIFT … #define MLXSW_I2C_GO_BIT_SHIFT … #define MLXSW_I2C_CIR_CTRL_STATUS_SHIFT … #define MLXSW_I2C_EVENT_BIT … #define MLXSW_I2C_GO_BIT … #define MLXSW_I2C_GO_OPMODE … #define MLXSW_I2C_SET_IMM_CMD … #define MLXSW_I2C_PUSH_IMM_CMD … #define MLXSW_I2C_SET_CMD … #define MLXSW_I2C_PUSH_CMD … #define MLXSW_I2C_TLV_HDR_SIZE … #define MLXSW_I2C_ADDR_WIDTH … #define MLXSW_I2C_PUSH_CMD_SIZE … #define MLXSW_I2C_SET_EVENT_CMD … #define MLXSW_I2C_PUSH_EVENT_CMD … #define MLXSW_I2C_READ_SEMA_SIZE … #define MLXSW_I2C_PREP_SIZE … #define MLXSW_I2C_MBOX_SIZE … #define MLXSW_I2C_MBOX_OUT_PARAM_OFF … #define MLXSW_I2C_MBOX_OFFSET_BITS … #define MLXSW_I2C_MBOX_SIZE_BITS … #define MLXSW_I2C_ADDR_BUF_SIZE … #define MLXSW_I2C_BLK_DEF … #define MLXSW_I2C_BLK_MAX … #define MLXSW_I2C_RETRY … #define MLXSW_I2C_TIMEOUT_MSECS … #define MLXSW_I2C_MAX_DATA_SIZE … /* Driver can be initialized by kernel platform driver or from the user * space. In the first case IRQ line number is passed through the platform * data, otherwise default IRQ line is to be used. Default IRQ is relevant * only for specific I2C slave address, allowing 3.4 MHz I2C path to the chip * (special hardware feature for I2C acceleration). */ #define MLXSW_I2C_DEFAULT_IRQ … #define MLXSW_FAST_I2C_SLAVE … /** * struct mlxsw_i2c - device private data: * @cmd: command attributes; * @cmd.mb_size_in: input mailbox size; * @cmd.mb_off_in: input mailbox offset in register space; * @cmd.mb_size_out: output mailbox size; * @cmd.mb_off_out: output mailbox offset in register space; * @cmd.lock: command execution lock; * @dev: I2C device; * @core: switch core pointer; * @bus_info: bus info block; * @block_size: maximum block size allowed to pass to under layer; * @pdata: device platform data; * @irq_work: interrupts work item; * @irq: IRQ line number; */ struct mlxsw_i2c { … }; #define MLXSW_I2C_READ_MSG(_client, _addr_buf, _buf, _len) … #define MLXSW_I2C_WRITE_MSG(_client, _buf, _len) … /* Routine converts in and out mail boxes offset and size. */ static inline void mlxsw_i2c_convert_mbox(struct mlxsw_i2c *mlxsw_i2c, u8 *buf) { … } /* Routine obtains register size from mail box buffer. */ static inline int mlxsw_i2c_get_reg_size(u8 *in_mbox) { … } /* Routine sets I2C device internal offset in the transaction buffer. */ static inline void mlxsw_i2c_set_slave_addr(u8 *buf, u32 off) { … } /* Routine waits until go bit is cleared. */ static int mlxsw_i2c_wait_go_bit(struct i2c_client *client, struct mlxsw_i2c *mlxsw_i2c, u8 *p_status) { … } /* Routine posts a command to ASIC through mail box. */ static int mlxsw_i2c_write_cmd(struct i2c_client *client, struct mlxsw_i2c *mlxsw_i2c, int immediate) { … } /* Routine posts initialization command to ASIC through mail box. */ static int mlxsw_i2c_write_init_cmd(struct i2c_client *client, struct mlxsw_i2c *mlxsw_i2c, u16 opcode, u32 in_mod) { … } /* Routine obtains mail box offsets from ASIC register space. */ static int mlxsw_i2c_get_mbox(struct i2c_client *client, struct mlxsw_i2c *mlxsw_i2c) { … } /* Routine sends I2C write transaction to ASIC device. */ static int mlxsw_i2c_write(struct device *dev, size_t in_mbox_size, u8 *in_mbox, int num, u8 *p_status) { … } /* Routine executes I2C command. */ static int mlxsw_i2c_cmd(struct device *dev, u16 opcode, u32 in_mod, size_t in_mbox_size, u8 *in_mbox, size_t out_mbox_size, u8 *out_mbox, u8 *status) { … } static int mlxsw_i2c_cmd_exec(void *bus_priv, u16 opcode, u8 opcode_mod, u32 in_mod, bool out_mbox_direct, char *in_mbox, size_t in_mbox_size, char *out_mbox, size_t out_mbox_size, u8 *status) { … } static bool mlxsw_i2c_skb_transmit_busy(void *bus_priv, const struct mlxsw_tx_info *tx_info) { … } static int mlxsw_i2c_skb_transmit(void *bus_priv, struct sk_buff *skb, const struct mlxsw_tx_info *tx_info) { … } static int mlxsw_i2c_init(void *bus_priv, struct mlxsw_core *mlxsw_core, const struct mlxsw_config_profile *profile, struct mlxsw_res *res) { … } static void mlxsw_i2c_fini(void *bus_priv) { … } static void mlxsw_i2c_work_handler(struct work_struct *work) { … } static irqreturn_t mlxsw_i2c_irq_handler(int irq, void *dev) { … } static int mlxsw_i2c_irq_init(struct mlxsw_i2c *mlxsw_i2c, u8 addr) { … } static void mlxsw_i2c_irq_fini(struct mlxsw_i2c *mlxsw_i2c) { … } static const struct mlxsw_bus mlxsw_i2c_bus = …; static int mlxsw_i2c_probe(struct i2c_client *client) { … } static void mlxsw_i2c_remove(struct i2c_client *client) { … } int mlxsw_i2c_driver_register(struct i2c_driver *i2c_driver) { … } EXPORT_SYMBOL(…); void mlxsw_i2c_driver_unregister(struct i2c_driver *i2c_driver) { … } EXPORT_SYMBOL(…); MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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