crypto: atmel-ecc - factor out code that can be shared (c34a3201) · Commits · 戴 / test

drivers/crypto/Kconfig

+4 −0

Original line number	Diff line number	Diff line
		@@ -519,9 +519,13 @@ config CRYPTO_DEV_ATMEL_SHA
		To compile this driver as a module, choose M here: the module
		will be called atmel-sha.

		config CRYPTO_DEV_ATMEL_I2C
		tristate

		config CRYPTO_DEV_ATMEL_ECC
		tristate "Support for Microchip / Atmel ECC hw accelerator"
		depends on I2C
		select CRYPTO_DEV_ATMEL_I2C
		select CRYPTO_ECDH
		select CRC16
		help

drivers/crypto/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -2,6 +2,7 @@
		obj-$(CONFIG_CRYPTO_DEV_ATMEL_AES) += atmel-aes.o
		obj-$(CONFIG_CRYPTO_DEV_ATMEL_SHA) += atmel-sha.o
		obj-$(CONFIG_CRYPTO_DEV_ATMEL_TDES) += atmel-tdes.o
		obj-$(CONFIG_CRYPTO_DEV_ATMEL_I2C) += atmel-i2c.o
		obj-$(CONFIG_CRYPTO_DEV_ATMEL_ECC) += atmel-ecc.o
		obj-$(CONFIG_CRYPTO_DEV_CAVIUM_ZIP) += cavium/
		obj-$(CONFIG_CRYPTO_DEV_CCP) += ccp/

drivers/crypto/atmel-ecc.c

+22 −384

Original line number	Diff line number	Diff line
		@@ -6,8 +6,6 @@
		* Author: Tudor Ambarus <tudor.ambarus@microchip.com>
		*/

		#include <linux/bitrev.h>
		#include <linux/crc16.h>
		#include <linux/delay.h>
		#include <linux/device.h>
		#include <linux/err.h>
		@@ -23,41 +21,10 @@
		#include <crypto/internal/kpp.h>
		#include <crypto/ecdh.h>
		#include <crypto/kpp.h>
		#include "atmel-ecc.h"

		/* 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;
		#include "atmel-i2c.h"

		static struct atmel_ecc_driver_data driver_data;

		/**
		* atmel_ecc_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_ecc_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;
		};

		/**
		* atmel_ecdh_ctx - transformation context
		* @client : pointer to i2c client device
		@@ -80,188 +47,12 @@ struct atmel_ecdh_ctx {
		bool do_fallback;
		};

		/**
		* atmel_ecc_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_ecc_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_ecc_work_data {
		struct atmel_ecdh_ctx *ctx;
		void (cbk)(struct atmel_ecc_work_data work_data, void *areq,
		int status);
		void *areq;
		struct work_struct work;
		struct atmel_ecc_cmd cmd;
		};

		static u16 atmel_ecc_crc16(u16 crc, const u8 *buffer, size_t len)
		{
		return cpu_to_le16(bitrev16(crc16(crc, buffer, len)));
		}

		/**
		* atmel_ecc_checksum() - Generate 16-bit CRC as required by ATMEL ECC.
		* CRC16 verification of the count, opcode, param1, param2 and data bytes.
		* The checksum is saved in little-endian format in the least significant
		* two bytes of the command. CRC polynomial is 0x8005 and the initial register
		* value should be zero.
		*
		* @cmd : structure used for communicating with the device.
		*/
		static void atmel_ecc_checksum(struct atmel_ecc_cmd *cmd)
		{
		u8 *data = &cmd->count;
		size_t len = cmd->count - CRC_SIZE;
		u16 crc16 = (u16 )(data + len);

		*crc16 = atmel_ecc_crc16(0, data, len);
		}

		static void atmel_ecc_init_read_cmd(struct atmel_ecc_cmd *cmd)
		{
		cmd->word_addr = COMMAND;
		cmd->opcode = OPCODE_READ;
		/*
		* Read the word from Configuration zone that contains the lock bytes
		* (UserExtra, Selector, LockValue, LockConfig).
		*/
		cmd->param1 = CONFIG_ZONE;
		cmd->param2 = DEVICE_LOCK_ADDR;
		cmd->count = READ_COUNT;

		atmel_ecc_checksum(cmd);

		cmd->msecs = MAX_EXEC_TIME_READ;
		cmd->rxsize = READ_RSP_SIZE;
		}

		static void atmel_ecc_init_genkey_cmd(struct atmel_ecc_cmd *cmd, u16 keyid)
		{
		cmd->word_addr = COMMAND;
		cmd->count = GENKEY_COUNT;
		cmd->opcode = OPCODE_GENKEY;
		cmd->param1 = GENKEY_MODE_PRIVATE;
		/* a random private key will be generated and stored in slot keyID */
		cmd->param2 = cpu_to_le16(keyid);

		atmel_ecc_checksum(cmd);

		cmd->msecs = MAX_EXEC_TIME_GENKEY;
		cmd->rxsize = GENKEY_RSP_SIZE;
		}

		static int atmel_ecc_init_ecdh_cmd(struct atmel_ecc_cmd *cmd,
		struct scatterlist *pubkey)
		{
		size_t copied;

		cmd->word_addr = COMMAND;
		cmd->count = ECDH_COUNT;
		cmd->opcode = OPCODE_ECDH;
		cmd->param1 = ECDH_PREFIX_MODE;
		/* private key slot */
		cmd->param2 = cpu_to_le16(DATA_SLOT_2);

		/*
		* The device only supports NIST P256 ECC keys. The public key size will
		* always be the same. Use a macro for the key size to avoid unnecessary
		* computations.
		*/
		copied = sg_copy_to_buffer(pubkey,
		sg_nents_for_len(pubkey,
		ATMEL_ECC_PUBKEY_SIZE),
		cmd->data, ATMEL_ECC_PUBKEY_SIZE);
		if (copied != ATMEL_ECC_PUBKEY_SIZE)
		return -EINVAL;

		atmel_ecc_checksum(cmd);

		cmd->msecs = MAX_EXEC_TIME_ECDH;
		cmd->rxsize = ECDH_RSP_SIZE;

		return 0;
		}

		/*
		* After wake and after execution of a command, there will be error, status, or
		* result bytes in the device's output register that can be retrieved by the
		* system. When the length of that group is four bytes, the codes returned are
		* detailed in error_list.
		*/
		static int atmel_ecc_status(struct device dev, u8 status)
		{
		size_t err_list_len = ARRAY_SIZE(error_list);
		int i;
		u8 err_id = status[1];

		if (*status != STATUS_SIZE)
		return 0;

		if (err_id == STATUS_WAKE_SUCCESSFUL \|\| err_id == STATUS_NOERR)
		return 0;

		for (i = 0; i < err_list_len; i++)
		if (error_list[i].value == err_id)
		break;

		/* if err_id is not in the error_list then ignore it */
		if (i != err_list_len) {
		dev_err(dev, "%02x: %s:\n", err_id, error_list[i].error_text);
		return err_id;
		}

		return 0;
		}

		static int atmel_ecc_wakeup(struct i2c_client *client)
		{
		struct atmel_ecc_i2c_client_priv *i2c_priv = i2c_get_clientdata(client);
		u8 status[STATUS_RSP_SIZE];
		int ret;

		/*
		* The device ignores any levels or transitions on the SCL pin when the
		* device is idle, asleep or during waking up. Don't check for error
		* when waking up the device.
		*/
		i2c_master_send(client, i2c_priv->wake_token, i2c_priv->wake_token_sz);

		/*
		* Wait to wake the device. Typical execution times for ecdh and genkey
		* are around tens of milliseconds. Delta is chosen to 50 microseconds.
		*/
		usleep_range(TWHI_MIN, TWHI_MAX);

		ret = i2c_master_recv(client, status, STATUS_SIZE);
		if (ret < 0)
		return ret;

		return atmel_ecc_status(&client->dev, status);
		}

		static int atmel_ecc_sleep(struct i2c_client *client)
		{
		u8 sleep = SLEEP_TOKEN;

		return i2c_master_send(client, &sleep, 1);
		}

		static void atmel_ecdh_done(struct atmel_ecc_work_data work_data, void areq,
		static void atmel_ecdh_done(struct atmel_i2c_work_data work_data, void areq,
		int status)
		{
		struct kpp_request *req = areq;
		struct atmel_ecdh_ctx *ctx = work_data->ctx;
		struct atmel_ecc_cmd *cmd = &work_data->cmd;
		struct atmel_i2c_cmd *cmd = &work_data->cmd;
		size_t copied, n_sz;

		if (status)
		@@ -282,82 +73,6 @@ free_work_data:
		kpp_request_complete(req, status);
		}

		/*
		* atmel_ecc_send_receive() - send a command to the device and receive its
		* response.
		* @client: i2c client device
		* @cmd : structure used to communicate with the device
		*
		* After the device receives a Wake token, a watchdog counter starts within the
		* device. After the watchdog timer expires, the device enters sleep mode
		* regardless of whether some I/O transmission or command execution is in
		* progress. If a command is attempted when insufficient time remains prior to
		* watchdog timer execution, the device will return the watchdog timeout error
		* code without attempting to execute the command. There is no way to reset the
		* counter other than to put the device into sleep or idle mode and then
		* wake it up again.
		*/
		static int atmel_ecc_send_receive(struct i2c_client *client,
		struct atmel_ecc_cmd *cmd)
		{
		struct atmel_ecc_i2c_client_priv *i2c_priv = i2c_get_clientdata(client);
		int ret;

		mutex_lock(&i2c_priv->lock);

		ret = atmel_ecc_wakeup(client);
		if (ret)
		goto err;

		/* send the command */
		ret = i2c_master_send(client, (u8 *)cmd, cmd->count + WORD_ADDR_SIZE);
		if (ret < 0)
		goto err;

		/* delay the appropriate amount of time for command to execute */
		msleep(cmd->msecs);

		/* receive the response */
		ret = i2c_master_recv(client, cmd->data, cmd->rxsize);
		if (ret < 0)
		goto err;

		/* put the device into low-power mode */
		ret = atmel_ecc_sleep(client);
		if (ret < 0)
		goto err;

		mutex_unlock(&i2c_priv->lock);
		return atmel_ecc_status(&client->dev, cmd->data);
		err:
		mutex_unlock(&i2c_priv->lock);
		return ret;
		}

		static void atmel_ecc_work_handler(struct work_struct *work)
		{
		struct atmel_ecc_work_data *work_data =
		container_of(work, struct atmel_ecc_work_data, work);
		struct atmel_ecc_cmd *cmd = &work_data->cmd;
		struct i2c_client *client = work_data->ctx->client;
		int status;

		status = atmel_ecc_send_receive(client, cmd);
		work_data->cbk(work_data, work_data->areq, status);
		}

		static void atmel_ecc_enqueue(struct atmel_ecc_work_data *work_data,
		void (cbk)(struct atmel_ecc_work_data work_data,
		void *areq, int status),
		void *areq)
		{
		work_data->cbk = (void *)cbk;
		work_data->areq = areq;

		INIT_WORK(&work_data->work, atmel_ecc_work_handler);
		schedule_work(&work_data->work);
		}

		static unsigned int atmel_ecdh_supported_curve(unsigned int curve_id)
		{
		if (curve_id == ECC_CURVE_NIST_P256)
		@@ -374,7 +89,7 @@ static int atmel_ecdh_set_secret(struct crypto_kpp tfm, const void buf,
		unsigned int len)
		{
		struct atmel_ecdh_ctx *ctx = kpp_tfm_ctx(tfm);
		struct atmel_ecc_cmd *cmd;
		struct atmel_i2c_cmd *cmd;
		void *public_key;
		struct ecdh params;
		int ret = -ENOMEM;
		@@ -412,9 +127,9 @@ static int atmel_ecdh_set_secret(struct crypto_kpp tfm, const void buf,
		ctx->do_fallback = false;
		ctx->curve_id = params.curve_id;

		atmel_ecc_init_genkey_cmd(cmd, DATA_SLOT_2);
		atmel_i2c_init_genkey_cmd(cmd, DATA_SLOT_2);

		ret = atmel_ecc_send_receive(ctx->client, cmd);
		ret = atmel_i2c_send_receive(ctx->client, cmd);
		if (ret)
		goto free_public_key;

		@@ -444,6 +159,9 @@ static int atmel_ecdh_generate_public_key(struct kpp_request *req)
		return crypto_kpp_generate_public_key(req);
		}

		if (!ctx->public_key)
		return -EINVAL;

		/* might want less than we've got */
		nbytes = min_t(size_t, ATMEL_ECC_PUBKEY_SIZE, req->dst_len);

		@@ -461,7 +179,7 @@ static int atmel_ecdh_compute_shared_secret(struct kpp_request *req)
		{
		struct crypto_kpp *tfm = crypto_kpp_reqtfm(req);
		struct atmel_ecdh_ctx *ctx = kpp_tfm_ctx(tfm);
		struct atmel_ecc_work_data *work_data;
		struct atmel_i2c_work_data *work_data;
		gfp_t gfp;
		int ret;

		@@ -482,12 +200,13 @@ static int atmel_ecdh_compute_shared_secret(struct kpp_request *req)
		return -ENOMEM;

		work_data->ctx = ctx;
		work_data->client = ctx->client;

		ret = atmel_ecc_init_ecdh_cmd(&work_data->cmd, req->src);
		ret = atmel_i2c_init_ecdh_cmd(&work_data->cmd, req->src);
		if (ret)
		goto free_work_data;

		atmel_ecc_enqueue(work_data, atmel_ecdh_done, req);
		atmel_i2c_enqueue(work_data, atmel_ecdh_done, req);

		return -EINPROGRESS;

		@@ -498,7 +217,7 @@ free_work_data:

		static struct i2c_client *atmel_ecc_i2c_client_alloc(void)
		{
		struct atmel_ecc_i2c_client_priv i2c_priv, min_i2c_priv = NULL;
		struct atmel_i2c_client_priv i2c_priv, min_i2c_priv = NULL;
		struct i2c_client *client = ERR_PTR(-ENODEV);
		int min_tfm_cnt = INT_MAX;
		int tfm_cnt;
		@@ -533,7 +252,7 @@ static struct i2c_client *atmel_ecc_i2c_client_alloc(void)

		static void atmel_ecc_i2c_client_free(struct i2c_client *client)
		{
		struct atmel_ecc_i2c_client_priv *i2c_priv = i2c_get_clientdata(client);
		struct atmel_i2c_client_priv *i2c_priv = i2c_get_clientdata(client);

		atomic_dec(&i2c_priv->tfm_count);
		}
		@@ -604,99 +323,18 @@ static struct kpp_alg atmel_ecdh = {
		},
		};

		static inline size_t atmel_ecc_wake_token_sz(u32 bus_clk_rate)
		{
		u32 no_of_bits = DIV_ROUND_UP(TWLO_USEC * bus_clk_rate, USEC_PER_SEC);

		/* return the size of the wake_token in bytes */
		return DIV_ROUND_UP(no_of_bits, 8);
		}

		static int device_sanity_check(struct i2c_client *client)
		{
		struct atmel_ecc_cmd *cmd;
		int ret;

		cmd = kmalloc(sizeof(*cmd), GFP_KERNEL);
		if (!cmd)
		return -ENOMEM;

		atmel_ecc_init_read_cmd(cmd);

		ret = atmel_ecc_send_receive(client, cmd);
		if (ret)
		goto free_cmd;

		/*
		* It is vital that the Configuration, Data and OTP zones be locked
		* prior to release into the field of the system containing the device.
		* Failure to lock these zones may permit modification of any secret
		* keys and may lead to other security problems.
		*/
		if (cmd->data[LOCK_CONFIG_IDX] \|\| cmd->data[LOCK_VALUE_IDX]) {
		dev_err(&client->dev, "Configuration or Data and OTP zones are unlocked!\n");
		ret = -ENOTSUPP;
		}

		/* fall through */
		free_cmd:
		kfree(cmd);
		return ret;
		}

		static int atmel_ecc_probe(struct i2c_client *client,
		const struct i2c_device_id *id)
		{
		struct atmel_ecc_i2c_client_priv *i2c_priv;
		struct device *dev = &client->dev;
		struct atmel_i2c_client_priv *i2c_priv;
		int ret;
		u32 bus_clk_rate;

		if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
		dev_err(dev, "I2C_FUNC_I2C not supported\n");
		return -ENODEV;
		}

		clk_rate = i2c_acpi_find_bus_speed(&client->adapter->dev);
		if (!clk_rate) {
		ret = device_property_read_u32(&client->adapter->dev,
		"clock-frequency", &bus_clk_rate);
		if (ret) {
		dev_err(dev, "failed to read clock-frequency property\n");
		return ret;
		}
		}

		if (bus_clk_rate > 1000000L) {
		dev_err(dev, "%d exceeds maximum supported clock frequency (1MHz)\n",
		bus_clk_rate);
		return -EINVAL;
		}

		i2c_priv = devm_kmalloc(dev, sizeof(*i2c_priv), GFP_KERNEL);
		if (!i2c_priv)
		return -ENOMEM;

		i2c_priv->client = client;
		mutex_init(&i2c_priv->lock);

		/*
		* WAKE_TOKEN_MAX_SIZE was calculated for the maximum bus_clk_rate -
		* 1MHz. The previous bus_clk_rate check ensures us that wake_token_sz
		* will always be smaller than or equal to WAKE_TOKEN_MAX_SIZE.
		*/
		i2c_priv->wake_token_sz = atmel_ecc_wake_token_sz(bus_clk_rate);

		memset(i2c_priv->wake_token, 0, sizeof(i2c_priv->wake_token));

		atomic_set(&i2c_priv->tfm_count, 0);

		i2c_set_clientdata(client, i2c_priv);

		ret = device_sanity_check(client);
		ret = atmel_i2c_probe(client, id);
		if (ret)
		return ret;

		i2c_priv = i2c_get_clientdata(client);

		spin_lock(&driver_data.i2c_list_lock);
		list_add_tail(&i2c_priv->i2c_client_list_node,
		&driver_data.i2c_client_list);
		@@ -708,10 +346,10 @@ static int atmel_ecc_probe(struct i2c_client *client,
		list_del(&i2c_priv->i2c_client_list_node);
		spin_unlock(&driver_data.i2c_list_lock);

		dev_err(dev, "%s alg registration failed\n",
		dev_err(&client->dev, "%s alg registration failed\n",
		atmel_ecdh.base.cra_driver_name);
		} else {
		dev_info(dev, "atmel ecc algorithms registered in /proc/crypto\n");
		dev_info(&client->dev, "atmel ecc algorithms registered in /proc/crypto\n");
		}

		return ret;
		@@ -719,7 +357,7 @@ static int atmel_ecc_probe(struct i2c_client *client,

		static int atmel_ecc_remove(struct i2c_client *client)
		{
		struct atmel_ecc_i2c_client_priv *i2c_priv = i2c_get_clientdata(client);
		struct atmel_i2c_client_priv *i2c_priv = i2c_get_clientdata(client);

		/* Return EBUSY if i2c client already allocated. */
		if (atomic_read(&i2c_priv->tfm_count)) {

drivers/crypto/atmel-i2c.c

0 → 100644

+349 −0

File added.

Preview size limit exceeded, changes collapsed.

drivers/crypto/atmel-ecc.h→drivers/crypto/atmel-i2c.h

+75 −5

Original line number	Diff line number	Diff line
		@@ -4,8 +4,8 @@
		* Author: Tudor Ambarus <tudor.ambarus@microchip.com>
		*/

		#ifndef __ATMEL_ECC_H__
		#define __ATMEL_ECC_H__
		#ifndef __ATMEL_I2C_H__
		#define __ATMEL_I2C_H__

		#define ATMEL_ECC_PRIORITY 300

		@@ -31,7 +31,7 @@
		#define MAX_RSP_SIZE GENKEY_RSP_SIZE

		/**
		* atmel_ecc_cmd - structure used for communicating with the device.
		* 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.
		@@ -42,7 +42,7 @@
		* @rxsize : size of the data received from i2c client.
		* @msecs : command execution time in milliseconds
		*/
		struct atmel_ecc_cmd {
		struct atmel_i2c_cmd {
		u8 word_addr;
		u8 count;
		u8 opcode;
		@@ -113,4 +113,74 @@ static const struct {
		#define ECDH_COUNT 71
		#define ECDH_PREFIX_MODE 0x00

		#endif /* __ATMEL_ECC_H__ */
		/* 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;
		};

		/**
		* 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, const struct i2c_device_id id);

		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);

		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_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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