| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Tudor-Dan Ambarus | 318 | 72.77% | 4 | 44.44% |
| Ard Biesheuvel | 108 | 24.71% | 2 | 22.22% |
| Tetsuo Handa | 6 | 1.37% | 1 | 11.11% |
| Herbert Xu | 4 | 0.92% | 1 | 11.11% |
| Lukas Bulwahn | 1 | 0.23% | 1 | 11.11% |
| Total | 437 | 9 |
/* SPDX-License-Identifier: GPL-2.0 */ /* * Copyright (c) 2017, Microchip Technology Inc. * Author: Tudor Ambarus */ #ifndef __ATMEL_I2C_H__ #define __ATMEL_I2C_H__ #include <linux/hw_random.h> #include <linux/types.h> #define ATMEL_ECC_PRIORITY 300 #define COMMAND 0x03 /* packet function */ #define SLEEP_TOKEN 0x01 #define WAKE_TOKEN_MAX_SIZE 8 /* Definitions of Data and Command sizes */ #define WORD_ADDR_SIZE 1 #define COUNT_SIZE 1 #define CRC_SIZE 2 #define CMD_OVERHEAD_SIZE (COUNT_SIZE + CRC_SIZE) /* size in bytes of the n prime */ #define ATMEL_ECC_NIST_P256_N_SIZE 32 #define ATMEL_ECC_PUBKEY_SIZE (2 * ATMEL_ECC_NIST_P256_N_SIZE) #define STATUS_RSP_SIZE 4 #define ECDH_RSP_SIZE (32 + CMD_OVERHEAD_SIZE) #define GENKEY_RSP_SIZE (ATMEL_ECC_PUBKEY_SIZE + \ CMD_OVERHEAD_SIZE) #define READ_RSP_SIZE (4 + CMD_OVERHEAD_SIZE) #define RANDOM_RSP_SIZE (32 + CMD_OVERHEAD_SIZE) #define MAX_RSP_SIZE GENKEY_RSP_SIZE /** * atmel_i2c_cmd - structure used for communicating with the device. * @word_addr: indicates the function of the packet sent to the device. This * byte should have a value of COMMAND for normal operation. * @count : number of bytes to be transferred to (or from) the device. * @opcode : the command code. * @param1 : the first parameter; always present. * @param2 : the second parameter; always present. * @data : optional remaining input data. Includes a 2-byte CRC. * @rxsize : size of the data received from i2c client. * @msecs : command execution time in milliseconds */ struct atmel_i2c_cmd { u8 word_addr; u8 count; u8 opcode; u8 param1; __le16 param2; u8 data[MAX_RSP_SIZE]; u8 msecs; u16 rxsize; } __packed; /* Status/Error codes */ #define STATUS_SIZE 0x04 #define STATUS_NOERR 0x00 #define STATUS_WAKE_SUCCESSFUL 0x11 /* Definitions for eeprom organization */ #define CONFIGURATION_ZONE 0 /* Definitions for Indexes common to all commands */ #define RSP_DATA_IDX 1 /* buffer index of data in response */ #define DATA_SLOT_2 2 /* used for ECDH private key */ /* Definitions for the device lock state */ #define DEVICE_LOCK_ADDR 0x15 #define LOCK_VALUE_IDX (RSP_DATA_IDX + 2) #define LOCK_CONFIG_IDX (RSP_DATA_IDX + 3) /* * Wake High delay to data communication (microseconds). SDA should be stable * high for this entire duration. */ #define TWHI_MIN 1500 #define TWHI_MAX 1550 /* Wake Low duration */ #define TWLO_USEC 60 /* Command execution time (milliseconds) */ #define MAX_EXEC_TIME_ECDH 58 #define MAX_EXEC_TIME_GENKEY 115 #define MAX_EXEC_TIME_READ 1 #define MAX_EXEC_TIME_RANDOM 50 /* Command opcode */ #define OPCODE_ECDH 0x43 #define OPCODE_GENKEY 0x40 #define OPCODE_READ 0x02 #define OPCODE_RANDOM 0x1b /* Definitions for the READ Command */ #define READ_COUNT 7 /* Definitions for the RANDOM Command */ #define RANDOM_COUNT 7 /* Definitions for the GenKey Command */ #define GENKEY_COUNT 7 #define GENKEY_MODE_PRIVATE 0x04 /* Definitions for the ECDH Command */ #define ECDH_COUNT 71 #define ECDH_PREFIX_MODE 0x00 /* Used for binding tfm objects to i2c clients. */ struct atmel_ecc_driver_data { struct list_head i2c_client_list; spinlock_t i2c_list_lock; } ____cacheline_aligned; /** * atmel_i2c_client_priv - i2c_client private data * @client : pointer to i2c client device * @i2c_client_list_node: part of i2c_client_list * @lock : lock for sending i2c commands * @wake_token : wake token array of zeros * @wake_token_sz : size in bytes of the wake_token * @tfm_count : number of active crypto transformations on i2c client * * Reads and writes from/to the i2c client are sequential. The first byte * transmitted to the device is treated as the byte size. Any attempt to send * more than this number of bytes will cause the device to not ACK those bytes. * After the host writes a single command byte to the input buffer, reads are * prohibited until after the device completes command execution. Use a mutex * when sending i2c commands. */ struct atmel_i2c_client_priv { struct i2c_client *client; struct list_head i2c_client_list_node; struct mutex lock; u8 wake_token[WAKE_TOKEN_MAX_SIZE]; size_t wake_token_sz; atomic_t tfm_count ____cacheline_aligned; struct hwrng hwrng; }; /** * atmel_i2c_work_data - data structure representing the work * @ctx : transformation context. * @cbk : pointer to a callback function to be invoked upon completion of this * request. This has the form: * callback(struct atmel_i2c_work_data *work_data, void *areq, u8 status) * where: * @work_data: data structure representing the work * @areq : optional pointer to an argument passed with the original * request. * @status : status returned from the i2c client device or i2c error. * @areq: optional pointer to a user argument for use at callback time. * @work: describes the task to be executed. * @cmd : structure used for communicating with the device. */ struct atmel_i2c_work_data { void *ctx; struct i2c_client *client; void (*cbk)(struct atmel_i2c_work_data *work_data, void *areq, int status); void *areq; struct work_struct work; struct atmel_i2c_cmd cmd; }; int atmel_i2c_probe(struct i2c_client *client); void atmel_i2c_enqueue(struct atmel_i2c_work_data *work_data, void (*cbk)(struct atmel_i2c_work_data *work_data, void *areq, int status), void *areq); void atmel_i2c_flush_queue(void); int atmel_i2c_send_receive(struct i2c_client *client, struct atmel_i2c_cmd *cmd); void atmel_i2c_init_read_cmd(struct atmel_i2c_cmd *cmd); void atmel_i2c_init_random_cmd(struct atmel_i2c_cmd *cmd); void atmel_i2c_init_genkey_cmd(struct atmel_i2c_cmd *cmd, u16 keyid); int atmel_i2c_init_ecdh_cmd(struct atmel_i2c_cmd *cmd, struct scatterlist *pubkey); #endif /* __ATMEL_I2C_H__ */
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