mirror of https://gitee.com/openkylin/linux.git
454 lines
12 KiB
C
454 lines
12 KiB
C
/*
|
|
* sun4i-ss-core.c - hardware cryptographic accelerator for Allwinner A20 SoC
|
|
*
|
|
* Copyright (C) 2013-2015 Corentin LABBE <clabbe.montjoie@gmail.com>
|
|
*
|
|
* Core file which registers crypto algorithms supported by the SS.
|
|
*
|
|
* You could find a link for the datasheet in Documentation/arm/sunxi/README
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*/
|
|
#include <linux/clk.h>
|
|
#include <linux/crypto.h>
|
|
#include <linux/io.h>
|
|
#include <linux/module.h>
|
|
#include <linux/of.h>
|
|
#include <linux/platform_device.h>
|
|
#include <crypto/scatterwalk.h>
|
|
#include <linux/scatterlist.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/reset.h>
|
|
|
|
#include "sun4i-ss.h"
|
|
|
|
static struct sun4i_ss_alg_template ss_algs[] = {
|
|
{ .type = CRYPTO_ALG_TYPE_AHASH,
|
|
.mode = SS_OP_MD5,
|
|
.alg.hash = {
|
|
.init = sun4i_hash_init,
|
|
.update = sun4i_hash_update,
|
|
.final = sun4i_hash_final,
|
|
.finup = sun4i_hash_finup,
|
|
.digest = sun4i_hash_digest,
|
|
.export = sun4i_hash_export_md5,
|
|
.import = sun4i_hash_import_md5,
|
|
.halg = {
|
|
.digestsize = MD5_DIGEST_SIZE,
|
|
.statesize = sizeof(struct md5_state),
|
|
.base = {
|
|
.cra_name = "md5",
|
|
.cra_driver_name = "md5-sun4i-ss",
|
|
.cra_priority = 300,
|
|
.cra_alignmask = 3,
|
|
.cra_blocksize = MD5_HMAC_BLOCK_SIZE,
|
|
.cra_ctxsize = sizeof(struct sun4i_req_ctx),
|
|
.cra_module = THIS_MODULE,
|
|
.cra_init = sun4i_hash_crainit
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{ .type = CRYPTO_ALG_TYPE_AHASH,
|
|
.mode = SS_OP_SHA1,
|
|
.alg.hash = {
|
|
.init = sun4i_hash_init,
|
|
.update = sun4i_hash_update,
|
|
.final = sun4i_hash_final,
|
|
.finup = sun4i_hash_finup,
|
|
.digest = sun4i_hash_digest,
|
|
.export = sun4i_hash_export_sha1,
|
|
.import = sun4i_hash_import_sha1,
|
|
.halg = {
|
|
.digestsize = SHA1_DIGEST_SIZE,
|
|
.statesize = sizeof(struct sha1_state),
|
|
.base = {
|
|
.cra_name = "sha1",
|
|
.cra_driver_name = "sha1-sun4i-ss",
|
|
.cra_priority = 300,
|
|
.cra_alignmask = 3,
|
|
.cra_blocksize = SHA1_BLOCK_SIZE,
|
|
.cra_ctxsize = sizeof(struct sun4i_req_ctx),
|
|
.cra_module = THIS_MODULE,
|
|
.cra_init = sun4i_hash_crainit
|
|
}
|
|
}
|
|
}
|
|
},
|
|
{ .type = CRYPTO_ALG_TYPE_SKCIPHER,
|
|
.alg.crypto = {
|
|
.setkey = sun4i_ss_aes_setkey,
|
|
.encrypt = sun4i_ss_cbc_aes_encrypt,
|
|
.decrypt = sun4i_ss_cbc_aes_decrypt,
|
|
.min_keysize = AES_MIN_KEY_SIZE,
|
|
.max_keysize = AES_MAX_KEY_SIZE,
|
|
.ivsize = AES_BLOCK_SIZE,
|
|
.base = {
|
|
.cra_name = "cbc(aes)",
|
|
.cra_driver_name = "cbc-aes-sun4i-ss",
|
|
.cra_priority = 300,
|
|
.cra_blocksize = AES_BLOCK_SIZE,
|
|
.cra_flags = CRYPTO_ALG_TYPE_SKCIPHER |
|
|
CRYPTO_ALG_KERN_DRIVER_ONLY,
|
|
.cra_ctxsize = sizeof(struct sun4i_tfm_ctx),
|
|
.cra_module = THIS_MODULE,
|
|
.cra_alignmask = 3,
|
|
.cra_init = sun4i_ss_cipher_init,
|
|
}
|
|
}
|
|
},
|
|
{ .type = CRYPTO_ALG_TYPE_SKCIPHER,
|
|
.alg.crypto = {
|
|
.setkey = sun4i_ss_aes_setkey,
|
|
.encrypt = sun4i_ss_ecb_aes_encrypt,
|
|
.decrypt = sun4i_ss_ecb_aes_decrypt,
|
|
.min_keysize = AES_MIN_KEY_SIZE,
|
|
.max_keysize = AES_MAX_KEY_SIZE,
|
|
.ivsize = AES_BLOCK_SIZE,
|
|
.base = {
|
|
.cra_name = "ecb(aes)",
|
|
.cra_driver_name = "ecb-aes-sun4i-ss",
|
|
.cra_priority = 300,
|
|
.cra_blocksize = AES_BLOCK_SIZE,
|
|
.cra_flags = CRYPTO_ALG_TYPE_SKCIPHER |
|
|
CRYPTO_ALG_KERN_DRIVER_ONLY,
|
|
.cra_ctxsize = sizeof(struct sun4i_tfm_ctx),
|
|
.cra_module = THIS_MODULE,
|
|
.cra_alignmask = 3,
|
|
.cra_init = sun4i_ss_cipher_init,
|
|
}
|
|
}
|
|
},
|
|
{ .type = CRYPTO_ALG_TYPE_SKCIPHER,
|
|
.alg.crypto = {
|
|
.setkey = sun4i_ss_des_setkey,
|
|
.encrypt = sun4i_ss_cbc_des_encrypt,
|
|
.decrypt = sun4i_ss_cbc_des_decrypt,
|
|
.min_keysize = DES_KEY_SIZE,
|
|
.max_keysize = DES_KEY_SIZE,
|
|
.ivsize = DES_BLOCK_SIZE,
|
|
.base = {
|
|
.cra_name = "cbc(des)",
|
|
.cra_driver_name = "cbc-des-sun4i-ss",
|
|
.cra_priority = 300,
|
|
.cra_blocksize = DES_BLOCK_SIZE,
|
|
.cra_flags = CRYPTO_ALG_TYPE_SKCIPHER |
|
|
CRYPTO_ALG_KERN_DRIVER_ONLY,
|
|
.cra_ctxsize = sizeof(struct sun4i_req_ctx),
|
|
.cra_module = THIS_MODULE,
|
|
.cra_alignmask = 3,
|
|
.cra_init = sun4i_ss_cipher_init,
|
|
}
|
|
}
|
|
},
|
|
{ .type = CRYPTO_ALG_TYPE_SKCIPHER,
|
|
.alg.crypto = {
|
|
.setkey = sun4i_ss_des_setkey,
|
|
.encrypt = sun4i_ss_ecb_des_encrypt,
|
|
.decrypt = sun4i_ss_ecb_des_decrypt,
|
|
.min_keysize = DES_KEY_SIZE,
|
|
.max_keysize = DES_KEY_SIZE,
|
|
.base = {
|
|
.cra_name = "ecb(des)",
|
|
.cra_driver_name = "ecb-des-sun4i-ss",
|
|
.cra_priority = 300,
|
|
.cra_blocksize = DES_BLOCK_SIZE,
|
|
.cra_flags = CRYPTO_ALG_TYPE_SKCIPHER |
|
|
CRYPTO_ALG_KERN_DRIVER_ONLY,
|
|
.cra_ctxsize = sizeof(struct sun4i_req_ctx),
|
|
.cra_module = THIS_MODULE,
|
|
.cra_alignmask = 3,
|
|
.cra_init = sun4i_ss_cipher_init,
|
|
}
|
|
}
|
|
},
|
|
{ .type = CRYPTO_ALG_TYPE_SKCIPHER,
|
|
.alg.crypto = {
|
|
.setkey = sun4i_ss_des3_setkey,
|
|
.encrypt = sun4i_ss_cbc_des3_encrypt,
|
|
.decrypt = sun4i_ss_cbc_des3_decrypt,
|
|
.min_keysize = DES3_EDE_KEY_SIZE,
|
|
.max_keysize = DES3_EDE_KEY_SIZE,
|
|
.ivsize = DES3_EDE_BLOCK_SIZE,
|
|
.base = {
|
|
.cra_name = "cbc(des3_ede)",
|
|
.cra_driver_name = "cbc-des3-sun4i-ss",
|
|
.cra_priority = 300,
|
|
.cra_blocksize = DES3_EDE_BLOCK_SIZE,
|
|
.cra_flags = CRYPTO_ALG_TYPE_SKCIPHER |
|
|
CRYPTO_ALG_KERN_DRIVER_ONLY,
|
|
.cra_ctxsize = sizeof(struct sun4i_req_ctx),
|
|
.cra_module = THIS_MODULE,
|
|
.cra_alignmask = 3,
|
|
.cra_init = sun4i_ss_cipher_init,
|
|
}
|
|
}
|
|
},
|
|
{ .type = CRYPTO_ALG_TYPE_SKCIPHER,
|
|
.alg.crypto = {
|
|
.setkey = sun4i_ss_des3_setkey,
|
|
.encrypt = sun4i_ss_ecb_des3_encrypt,
|
|
.decrypt = sun4i_ss_ecb_des3_decrypt,
|
|
.min_keysize = DES3_EDE_KEY_SIZE,
|
|
.max_keysize = DES3_EDE_KEY_SIZE,
|
|
.ivsize = DES3_EDE_BLOCK_SIZE,
|
|
.base = {
|
|
.cra_name = "ecb(des3_ede)",
|
|
.cra_driver_name = "ecb-des3-sun4i-ss",
|
|
.cra_priority = 300,
|
|
.cra_blocksize = DES3_EDE_BLOCK_SIZE,
|
|
.cra_flags = CRYPTO_ALG_TYPE_SKCIPHER,
|
|
.cra_ctxsize = sizeof(struct sun4i_req_ctx),
|
|
.cra_module = THIS_MODULE,
|
|
.cra_alignmask = 3,
|
|
.cra_init = sun4i_ss_cipher_init,
|
|
}
|
|
}
|
|
},
|
|
#ifdef CONFIG_CRYPTO_DEV_SUN4I_SS_PRNG
|
|
{
|
|
.type = CRYPTO_ALG_TYPE_RNG,
|
|
.alg.rng = {
|
|
.base = {
|
|
.cra_name = "stdrng",
|
|
.cra_driver_name = "sun4i_ss_rng",
|
|
.cra_priority = 300,
|
|
.cra_ctxsize = 0,
|
|
.cra_module = THIS_MODULE,
|
|
},
|
|
.generate = sun4i_ss_prng_generate,
|
|
.seed = sun4i_ss_prng_seed,
|
|
.seedsize = SS_SEED_LEN / BITS_PER_BYTE,
|
|
}
|
|
},
|
|
#endif
|
|
};
|
|
|
|
static int sun4i_ss_probe(struct platform_device *pdev)
|
|
{
|
|
struct resource *res;
|
|
u32 v;
|
|
int err, i;
|
|
unsigned long cr;
|
|
const unsigned long cr_ahb = 24 * 1000 * 1000;
|
|
const unsigned long cr_mod = 150 * 1000 * 1000;
|
|
struct sun4i_ss_ctx *ss;
|
|
|
|
if (!pdev->dev.of_node)
|
|
return -ENODEV;
|
|
|
|
ss = devm_kzalloc(&pdev->dev, sizeof(*ss), GFP_KERNEL);
|
|
if (!ss)
|
|
return -ENOMEM;
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
ss->base = devm_ioremap_resource(&pdev->dev, res);
|
|
if (IS_ERR(ss->base)) {
|
|
dev_err(&pdev->dev, "Cannot request MMIO\n");
|
|
return PTR_ERR(ss->base);
|
|
}
|
|
|
|
ss->ssclk = devm_clk_get(&pdev->dev, "mod");
|
|
if (IS_ERR(ss->ssclk)) {
|
|
err = PTR_ERR(ss->ssclk);
|
|
dev_err(&pdev->dev, "Cannot get SS clock err=%d\n", err);
|
|
return err;
|
|
}
|
|
dev_dbg(&pdev->dev, "clock ss acquired\n");
|
|
|
|
ss->busclk = devm_clk_get(&pdev->dev, "ahb");
|
|
if (IS_ERR(ss->busclk)) {
|
|
err = PTR_ERR(ss->busclk);
|
|
dev_err(&pdev->dev, "Cannot get AHB SS clock err=%d\n", err);
|
|
return err;
|
|
}
|
|
dev_dbg(&pdev->dev, "clock ahb_ss acquired\n");
|
|
|
|
ss->reset = devm_reset_control_get_optional(&pdev->dev, "ahb");
|
|
if (IS_ERR(ss->reset)) {
|
|
if (PTR_ERR(ss->reset) == -EPROBE_DEFER)
|
|
return PTR_ERR(ss->reset);
|
|
dev_info(&pdev->dev, "no reset control found\n");
|
|
ss->reset = NULL;
|
|
}
|
|
|
|
/* Enable both clocks */
|
|
err = clk_prepare_enable(ss->busclk);
|
|
if (err) {
|
|
dev_err(&pdev->dev, "Cannot prepare_enable busclk\n");
|
|
return err;
|
|
}
|
|
err = clk_prepare_enable(ss->ssclk);
|
|
if (err) {
|
|
dev_err(&pdev->dev, "Cannot prepare_enable ssclk\n");
|
|
goto error_ssclk;
|
|
}
|
|
|
|
/*
|
|
* Check that clock have the correct rates given in the datasheet
|
|
* Try to set the clock to the maximum allowed
|
|
*/
|
|
err = clk_set_rate(ss->ssclk, cr_mod);
|
|
if (err) {
|
|
dev_err(&pdev->dev, "Cannot set clock rate to ssclk\n");
|
|
goto error_clk;
|
|
}
|
|
|
|
/* Deassert reset if we have a reset control */
|
|
if (ss->reset) {
|
|
err = reset_control_deassert(ss->reset);
|
|
if (err) {
|
|
dev_err(&pdev->dev, "Cannot deassert reset control\n");
|
|
goto error_clk;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* The only impact on clocks below requirement are bad performance,
|
|
* so do not print "errors"
|
|
* warn on Overclocked clocks
|
|
*/
|
|
cr = clk_get_rate(ss->busclk);
|
|
if (cr >= cr_ahb)
|
|
dev_dbg(&pdev->dev, "Clock bus %lu (%lu MHz) (must be >= %lu)\n",
|
|
cr, cr / 1000000, cr_ahb);
|
|
else
|
|
dev_warn(&pdev->dev, "Clock bus %lu (%lu MHz) (must be >= %lu)\n",
|
|
cr, cr / 1000000, cr_ahb);
|
|
|
|
cr = clk_get_rate(ss->ssclk);
|
|
if (cr <= cr_mod)
|
|
if (cr < cr_mod)
|
|
dev_warn(&pdev->dev, "Clock ss %lu (%lu MHz) (must be <= %lu)\n",
|
|
cr, cr / 1000000, cr_mod);
|
|
else
|
|
dev_dbg(&pdev->dev, "Clock ss %lu (%lu MHz) (must be <= %lu)\n",
|
|
cr, cr / 1000000, cr_mod);
|
|
else
|
|
dev_warn(&pdev->dev, "Clock ss is at %lu (%lu MHz) (must be <= %lu)\n",
|
|
cr, cr / 1000000, cr_mod);
|
|
|
|
/*
|
|
* Datasheet named it "Die Bonding ID"
|
|
* I expect to be a sort of Security System Revision number.
|
|
* Since the A80 seems to have an other version of SS
|
|
* this info could be useful
|
|
*/
|
|
writel(SS_ENABLED, ss->base + SS_CTL);
|
|
v = readl(ss->base + SS_CTL);
|
|
v >>= 16;
|
|
v &= 0x07;
|
|
dev_info(&pdev->dev, "Die ID %d\n", v);
|
|
writel(0, ss->base + SS_CTL);
|
|
|
|
ss->dev = &pdev->dev;
|
|
|
|
spin_lock_init(&ss->slock);
|
|
|
|
for (i = 0; i < ARRAY_SIZE(ss_algs); i++) {
|
|
ss_algs[i].ss = ss;
|
|
switch (ss_algs[i].type) {
|
|
case CRYPTO_ALG_TYPE_SKCIPHER:
|
|
err = crypto_register_skcipher(&ss_algs[i].alg.crypto);
|
|
if (err) {
|
|
dev_err(ss->dev, "Fail to register %s\n",
|
|
ss_algs[i].alg.crypto.base.cra_name);
|
|
goto error_alg;
|
|
}
|
|
break;
|
|
case CRYPTO_ALG_TYPE_AHASH:
|
|
err = crypto_register_ahash(&ss_algs[i].alg.hash);
|
|
if (err) {
|
|
dev_err(ss->dev, "Fail to register %s\n",
|
|
ss_algs[i].alg.hash.halg.base.cra_name);
|
|
goto error_alg;
|
|
}
|
|
break;
|
|
case CRYPTO_ALG_TYPE_RNG:
|
|
err = crypto_register_rng(&ss_algs[i].alg.rng);
|
|
if (err) {
|
|
dev_err(ss->dev, "Fail to register %s\n",
|
|
ss_algs[i].alg.rng.base.cra_name);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
platform_set_drvdata(pdev, ss);
|
|
return 0;
|
|
error_alg:
|
|
i--;
|
|
for (; i >= 0; i--) {
|
|
switch (ss_algs[i].type) {
|
|
case CRYPTO_ALG_TYPE_SKCIPHER:
|
|
crypto_unregister_skcipher(&ss_algs[i].alg.crypto);
|
|
break;
|
|
case CRYPTO_ALG_TYPE_AHASH:
|
|
crypto_unregister_ahash(&ss_algs[i].alg.hash);
|
|
break;
|
|
case CRYPTO_ALG_TYPE_RNG:
|
|
crypto_unregister_rng(&ss_algs[i].alg.rng);
|
|
break;
|
|
}
|
|
}
|
|
if (ss->reset)
|
|
reset_control_assert(ss->reset);
|
|
error_clk:
|
|
clk_disable_unprepare(ss->ssclk);
|
|
error_ssclk:
|
|
clk_disable_unprepare(ss->busclk);
|
|
return err;
|
|
}
|
|
|
|
static int sun4i_ss_remove(struct platform_device *pdev)
|
|
{
|
|
int i;
|
|
struct sun4i_ss_ctx *ss = platform_get_drvdata(pdev);
|
|
|
|
for (i = 0; i < ARRAY_SIZE(ss_algs); i++) {
|
|
switch (ss_algs[i].type) {
|
|
case CRYPTO_ALG_TYPE_SKCIPHER:
|
|
crypto_unregister_skcipher(&ss_algs[i].alg.crypto);
|
|
break;
|
|
case CRYPTO_ALG_TYPE_AHASH:
|
|
crypto_unregister_ahash(&ss_algs[i].alg.hash);
|
|
break;
|
|
case CRYPTO_ALG_TYPE_RNG:
|
|
crypto_unregister_rng(&ss_algs[i].alg.rng);
|
|
break;
|
|
}
|
|
}
|
|
|
|
writel(0, ss->base + SS_CTL);
|
|
if (ss->reset)
|
|
reset_control_assert(ss->reset);
|
|
clk_disable_unprepare(ss->busclk);
|
|
clk_disable_unprepare(ss->ssclk);
|
|
return 0;
|
|
}
|
|
|
|
static const struct of_device_id a20ss_crypto_of_match_table[] = {
|
|
{ .compatible = "allwinner,sun4i-a10-crypto" },
|
|
{}
|
|
};
|
|
MODULE_DEVICE_TABLE(of, a20ss_crypto_of_match_table);
|
|
|
|
static struct platform_driver sun4i_ss_driver = {
|
|
.probe = sun4i_ss_probe,
|
|
.remove = sun4i_ss_remove,
|
|
.driver = {
|
|
.name = "sun4i-ss",
|
|
.of_match_table = a20ss_crypto_of_match_table,
|
|
},
|
|
};
|
|
|
|
module_platform_driver(sun4i_ss_driver);
|
|
|
|
MODULE_ALIAS("platform:sun4i-ss");
|
|
MODULE_DESCRIPTION("Allwinner Security System cryptographic accelerator");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Corentin LABBE <clabbe.montjoie@gmail.com>");
|