diff options
Diffstat (limited to 'drivers/crypto/stmp3xxx_dcp.c')
| -rw-r--r-- | drivers/crypto/stmp3xxx_dcp.c | 1401 |
1 files changed, 1401 insertions, 0 deletions
diff --git a/drivers/crypto/stmp3xxx_dcp.c b/drivers/crypto/stmp3xxx_dcp.c new file mode 100644 index 000000000000..ff02ec807ec0 --- /dev/null +++ b/drivers/crypto/stmp3xxx_dcp.c @@ -0,0 +1,1401 @@ +/* + * Copyright 2008-2009 Freescale Semiconductor, Inc. All Rights Reserved. + */ + +/* + * The code contained herein is licensed under the GNU General Public + * License. You may obtain a copy of the GNU General Public License + * Version 2 or later at the following locations: + * + * http://www.opensource.org/licenses/gpl-license.html + * http://www.gnu.org/copyleft/gpl.html + */ +/* + * Based on geode-aes.c + * Copyright (C) 2004-2006, Advanced Micro Devices, Inc. + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/crypto.h> +#include <linux/spinlock.h> +#include <linux/platform_device.h> +#include <linux/err.h> +#include <crypto/algapi.h> +#include <crypto/aes.h> +#include <crypto/sha.h> +#include <linux/dma-mapping.h> +#include <linux/interrupt.h> +#include <linux/delay.h> + +#include <linux/io.h> +#include <linux/delay.h> + +#include <asm/cacheflush.h> + +#include "stmp3xxx_dcp.h" + +/* SHA1 is busted */ +#define DISABLE_SHA1 + +struct stmp3xxx_dcp { + struct device *dev; + spinlock_t lock; + struct mutex op_mutex[STMP3XXX_DCP_NUM_CHANNELS]; + struct completion op_wait[STMP3XXX_DCP_NUM_CHANNELS]; + int wait[STMP3XXX_DCP_NUM_CHANNELS]; + int dcp_vmi_irq; + int dcp_irq; +}; + +/* cipher flags */ +#define STMP3XXX_DCP_ENC 0x0001 +#define STMP3XXX_DCP_DEC 0x0002 +#define STMP3XXX_DCP_ECB 0x0004 +#define STMP3XXX_DCP_CBC 0x0008 +#define STMP3XXX_DCP_CBC_INIT 0x0010 +#define STMP3XXX_DCP_OTPKEY 0x0020 + +/* hash flags */ +#define STMP3XXX_DCP_INIT 0x0001 +#define STMP3XXX_DCP_UPDATE 0x0002 +#define STMP3XXX_DCP_FINAL 0x0004 + +#define STMP3XXX_DCP_AES 0x1000 +#define STMP3XXX_DCP_SHA1 0x2000 +#define STMP3XXX_DCP_CRC32 0x3000 +#define STMP3XXX_DCP_COPY 0x4000 +#define STMP3XXX_DCP_FILL 0x5000 +#define STMP3XXX_DCP_MODE_MASK 0xf000 + +struct stmp3xxx_dcp_op { + + unsigned int flags; + + void *src; + dma_addr_t src_phys; + + void *dst; + dma_addr_t dst_phys; + + int len; + + /* the key contains the IV for block modes */ + union { + struct { + u8 key[2 * AES_KEYSIZE_128] + __attribute__ ((__aligned__(32))); + dma_addr_t key_phys; + int keylen; + } cipher; + struct { + u8 digest[SHA1_DIGEST_SIZE] + __attribute__ ((__aligned__(32))); + dma_addr_t digest_phys; + int digestlen; + int init; + } hash; + }; + + union { + struct crypto_blkcipher *blk; + struct crypto_cipher *cip; + struct crypto_hash *hash; + } fallback; + + struct stmp3xxx_dcp_hw_packet pkt + __attribute__ ((__aligned__(32))); +}; + +struct stmp3xxx_dcp_hash_coherent_block { + struct stmp3xxx_dcp_hw_packet pkt[2] + __attribute__ ((__aligned__(32))); + u8 digest[SHA1_DIGEST_SIZE] + __attribute__ ((__aligned__(32))); + u8 rembuf[32]; +}; + +struct stmp3xxx_dcp_hash_op { + + unsigned int flags; + + void *src; + dma_addr_t src_phys; + + void *dst; + dma_addr_t dst_phys; + + int len; + + /* the key contains the IV for block modes */ + union { + struct { + u8 key[2 * AES_KEYSIZE_128] + __attribute__ ((__aligned__(32))); + dma_addr_t key_phys; + int keylen; + } cipher; + struct { + u8 digest[SHA1_DIGEST_SIZE] + __attribute__ ((__aligned__(32))); + dma_addr_t digest_phys; + int digestlen; + int init; + } hash; + }; + + union { + struct crypto_blkcipher *blk; + struct crypto_cipher *cip; + struct crypto_hash *hash; + } fallback; + + struct stmp3xxx_dcp_hash_coherent_block *hw; + dma_addr_t hw_phys; +}; + +/* only one */ +static struct stmp3xxx_dcp *global_sdcp; + +static void dcp_perform_op(struct stmp3xxx_dcp_op *op) +{ + struct stmp3xxx_dcp *sdcp = global_sdcp; + struct mutex *mutex; + struct stmp3xxx_dcp_hw_packet *pkt; + int chan; + u32 pkt1, pkt2; + unsigned long timeout; + dma_addr_t pkt_phys; + u32 stat; + + pkt1 = BM_DCP_PACKET1_DECR_SEMAPHORE | BM_DCP_PACKET1_INTERRUPT; + + switch (op->flags & STMP3XXX_DCP_MODE_MASK) { + + case STMP3XXX_DCP_AES: + + chan = CIPHER_CHAN; + + /* key is at the payload */ + pkt1 |= BM_DCP_PACKET1_ENABLE_CIPHER; + if ((op->flags & STMP3XXX_DCP_OTPKEY) == 0) + pkt1 |= BM_DCP_PACKET1_PAYLOAD_KEY; + if (op->flags & STMP3XXX_DCP_ENC) + pkt1 |= BM_DCP_PACKET1_CIPHER_ENCRYPT; + if (op->flags & STMP3XXX_DCP_CBC_INIT) + pkt1 |= BM_DCP_PACKET1_CIPHER_INIT; + + pkt2 = BF_DCP_PACKET2_CIPHER_CFG(0) | + BF_DCP_PACKET2_KEY_SELECT(0) | + BF_DCP_PACKET2_CIPHER_SELECT( + BV_DCP_PACKET2_CIPHER_SELECT__AES128); + + if (op->flags & STMP3XXX_DCP_ECB) + pkt2 |= BF_DCP_PACKET2_CIPHER_MODE( + BV_DCP_PACKET2_CIPHER_MODE__ECB); + else if (op->flags & STMP3XXX_DCP_CBC) + pkt2 |= BF_DCP_PACKET2_CIPHER_MODE( + BV_DCP_PACKET2_CIPHER_MODE__CBC); + + break; + + case STMP3XXX_DCP_SHA1: + + chan = HASH_CHAN; + + pkt1 |= BM_DCP_PACKET1_ENABLE_HASH; + if (op->flags & STMP3XXX_DCP_INIT) + pkt1 |= BM_DCP_PACKET1_HASH_INIT; + if (op->flags & STMP3XXX_DCP_FINAL) { + pkt1 |= BM_DCP_PACKET1_HASH_TERM; + BUG_ON(op->hash.digest == NULL); + } + + pkt2 = BF_DCP_PACKET2_HASH_SELECT( + BV_DCP_PACKET2_HASH_SELECT__SHA1); + break; + + default: + dev_err(sdcp->dev, "Unsupported mode\n"); + return; + } + + mutex = &sdcp->op_mutex[chan]; + pkt = &op->pkt; + + pkt->pNext = 0; + pkt->pkt1 = pkt1; + pkt->pkt2 = pkt2; + pkt->pSrc = (u32)op->src_phys; + pkt->pDst = (u32)op->dst_phys; + pkt->size = op->len; + pkt->pPayload = chan == CIPHER_CHAN ? + (u32)op->cipher.key_phys : (u32)op->hash.digest_phys; + pkt->stat = 0; + + pkt_phys = dma_map_single(sdcp->dev, pkt, sizeof(*pkt), + DMA_BIDIRECTIONAL); + if (dma_mapping_error(sdcp->dev, pkt_phys)) { + dev_err(sdcp->dev, "Unable to map packet descriptor\n"); + return; + } + + /* submit the work */ + mutex_lock(mutex); + + HW_DCP_CHnSTAT_CLR(chan, -1); + + /* Load the work packet pointer and bump the channel semaphore */ + HW_DCP_CHnCMDPTR_WR(chan, (u32)pkt_phys); + + /* XXX wake from interrupt instead of looping */ + timeout = jiffies + msecs_to_jiffies(1000); + + sdcp->wait[chan] = 0; + HW_DCP_CHnSEMA_WR(chan, BF_DCP_CHnSEMA_INCREMENT(1)); + while (time_before(jiffies, timeout) && sdcp->wait[chan] == 0) + cpu_relax(); + + if (!time_before(jiffies, timeout)) { + dev_err(sdcp->dev, "Timeout while waiting STAT 0x%08x\n", + HW_DCP_STAT_RD()); + goto out; + } + + stat = HW_DCP_CHnSTAT_RD(chan); + if ((stat & 0xff) != 0) + dev_err(sdcp->dev, "Channel stat error 0x%02x\n", + HW_DCP_CHnSTAT_RD(chan) & 0xff); +out: + mutex_unlock(mutex); + + dma_unmap_single(sdcp->dev, pkt_phys, sizeof(*pkt), DMA_TO_DEVICE); +} + +static int dcp_aes_setkey_cip(struct crypto_tfm *tfm, const u8 *key, + unsigned int len) +{ + struct stmp3xxx_dcp_op *op = crypto_tfm_ctx(tfm); + unsigned int ret; + + op->cipher.keylen = len; + + if (len == AES_KEYSIZE_128) { + memcpy(op->cipher.key, key, len); + return 0; + } + + if (len != AES_KEYSIZE_192 && len != AES_KEYSIZE_256) { + /* not supported at all */ + tfm->crt_flags |= CRYPTO_TFM_RES_BAD_KEY_LEN; + return -EINVAL; + } + + /* + * The requested key size is not supported by HW, do a fallback + */ + op->fallback.blk->base.crt_flags &= ~CRYPTO_TFM_REQ_MASK; + op->fallback.blk->base.crt_flags |= (tfm->crt_flags & + CRYPTO_TFM_REQ_MASK); + + ret = crypto_cipher_setkey(op->fallback.cip, key, len); + if (ret) { + tfm->crt_flags &= ~CRYPTO_TFM_RES_MASK; + tfm->crt_flags |= (op->fallback.blk->base.crt_flags & + CRYPTO_TFM_RES_MASK); + } + return ret; +} + +static void dcp_aes_encrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in) +{ + struct stmp3xxx_dcp *sdcp = global_sdcp; + struct stmp3xxx_dcp_op *op = crypto_tfm_ctx(tfm); + + if (unlikely(op->cipher.keylen != AES_KEYSIZE_128)) { + crypto_cipher_encrypt_one(op->fallback.cip, out, in); + return; + } + + op->src = (void *) in; + op->dst = (void *) out; + op->flags = STMP3XXX_DCP_AES | STMP3XXX_DCP_ENC | STMP3XXX_DCP_ECB; + op->len = AES_KEYSIZE_128; + + /* map the data */ + op->src_phys = dma_map_single(sdcp->dev, (void *)in, AES_KEYSIZE_128, + DMA_TO_DEVICE); + if (dma_mapping_error(sdcp->dev, op->src_phys)) { + dev_err(sdcp->dev, "Unable to map source\n"); + return; + } + + op->dst_phys = dma_map_single(sdcp->dev, out, AES_KEYSIZE_128, + DMA_FROM_DEVICE); + if (dma_mapping_error(sdcp->dev, op->dst_phys)) { + dev_err(sdcp->dev, "Unable to map dest\n"); + goto err_unmap_src; + } + + op->cipher.key_phys = dma_map_single(sdcp->dev, op->cipher.key, + AES_KEYSIZE_128, DMA_TO_DEVICE); + if (dma_mapping_error(sdcp->dev, op->cipher.key_phys)) { + dev_err(sdcp->dev, "Unable to map key\n"); + goto err_unmap_dst; + } + + /* perform the operation */ + dcp_perform_op(op); + + dma_unmap_single(sdcp->dev, op->cipher.key_phys, AES_KEYSIZE_128, + DMA_TO_DEVICE); +err_unmap_dst: + dma_unmap_single(sdcp->dev, op->dst_phys, op->len, DMA_FROM_DEVICE); +err_unmap_src: + dma_unmap_single(sdcp->dev, op->src_phys, op->len, DMA_TO_DEVICE); +} + +static void dcp_aes_decrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in) +{ + struct stmp3xxx_dcp *sdcp = global_sdcp; + struct stmp3xxx_dcp_op *op = crypto_tfm_ctx(tfm); + + if (unlikely(op->cipher.keylen != AES_KEYSIZE_128)) { + crypto_cipher_decrypt_one(op->fallback.cip, out, in); + return; + } + + op->src = (void *) in; + op->dst = (void *) out; + op->flags = STMP3XXX_DCP_AES | STMP3XXX_DCP_DEC | STMP3XXX_DCP_ECB; + op->len = AES_KEYSIZE_128; + + /* map the data */ + op->src_phys = dma_map_single(sdcp->dev, (void *)in, AES_KEYSIZE_128, + DMA_TO_DEVICE); + if (dma_mapping_error(sdcp->dev, op->src_phys)) { + dev_err(sdcp->dev, "Unable to map source\n"); + return; + } + + op->dst_phys = dma_map_single(sdcp->dev, out, AES_KEYSIZE_128, + DMA_FROM_DEVICE); + if (dma_mapping_error(sdcp->dev, op->dst_phys)) { + dev_err(sdcp->dev, "Unable to map dest\n"); + goto err_unmap_src; + } + + op->cipher.key_phys = dma_map_single(sdcp->dev, op->cipher.key, + AES_KEYSIZE_128, DMA_TO_DEVICE); + if (dma_mapping_error(sdcp->dev, op->cipher.key_phys)) { + dev_err(sdcp->dev, "Unable to map key\n"); + goto err_unmap_dst; + } + + /* perform the operation */ + dcp_perform_op(op); + + dma_unmap_single(sdcp->dev, op->cipher.key_phys, AES_KEYSIZE_128, + DMA_TO_DEVICE); +err_unmap_dst: + dma_unmap_single(sdcp->dev, op->dst_phys, op->len, DMA_FROM_DEVICE); +err_unmap_src: + dma_unmap_single(sdcp->dev, op->src_phys, op->len, DMA_TO_DEVICE); +} + +static int fallback_init_cip(struct crypto_tfm *tfm) +{ + const char *name = tfm->__crt_alg->cra_name; + struct stmp3xxx_dcp_op *op = crypto_tfm_ctx(tfm); + + op->fallback.cip = crypto_alloc_cipher(name, 0, + CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK); + + if (IS_ERR(op->fallback.cip)) { + printk(KERN_ERR "Error allocating fallback algo %s\n", name); + return PTR_ERR(op->fallback.cip); + } + + return 0; +} + +static void fallback_exit_cip(struct crypto_tfm *tfm) +{ + struct stmp3xxx_dcp_op *op = crypto_tfm_ctx(tfm); + + crypto_free_cipher(op->fallback.cip); + op->fallback.cip = NULL; +} + +static struct crypto_alg dcp_aes_alg = { + .cra_name = "aes", + .cra_driver_name = "dcp-aes", + .cra_priority = 300, + .cra_alignmask = 15, + .cra_flags = CRYPTO_ALG_TYPE_CIPHER | + CRYPTO_ALG_NEED_FALLBACK, + .cra_init = fallback_init_cip, + .cra_exit = fallback_exit_cip, + .cra_blocksize = AES_KEYSIZE_128, + .cra_ctxsize = sizeof(struct stmp3xxx_dcp_op), + .cra_module = THIS_MODULE, + .cra_list = LIST_HEAD_INIT(dcp_aes_alg.cra_list), + .cra_u = { + .cipher = { + .cia_min_keysize = AES_MIN_KEY_SIZE, + .cia_max_keysize = AES_MAX_KEY_SIZE, + .cia_setkey = dcp_aes_setkey_cip, + .cia_encrypt = dcp_aes_encrypt, + .cia_decrypt = dcp_aes_decrypt + } + } +}; + +static int dcp_aes_setkey_blk(struct crypto_tfm *tfm, const u8 *key, + unsigned int len) +{ + struct stmp3xxx_dcp_op *op = crypto_tfm_ctx(tfm); + unsigned int ret; + + op->cipher.keylen = len; + + if (len == AES_KEYSIZE_128) { + memcpy(op->cipher.key, key, len); + return 0; + } + + if (len != AES_KEYSIZE_192 && len != AES_KEYSIZE_256) { + /* not supported at all */ + tfm->crt_flags |= CRYPTO_TFM_RES_BAD_KEY_LEN; + return -EINVAL; + } + + /* + * The requested key size is not supported by HW, do a fallback + */ + op->fallback.blk->base.crt_flags &= ~CRYPTO_TFM_REQ_MASK; + op->fallback.blk->base.crt_flags |= (tfm->crt_flags & + CRYPTO_TFM_REQ_MASK); + + ret = crypto_blkcipher_setkey(op->fallback.blk, key, len); + if (ret) { + tfm->crt_flags &= ~CRYPTO_TFM_RES_MASK; + tfm->crt_flags |= (op->fallback.blk->base.crt_flags & + CRYPTO_TFM_RES_MASK); + } + return ret; +} + +static int fallback_blk_dec(struct blkcipher_desc *desc, + struct scatterlist *dst, struct scatterlist *src, + unsigned int nbytes) +{ + unsigned int ret; + struct crypto_blkcipher *tfm; + struct stmp3xxx_dcp_op *op = crypto_blkcipher_ctx(desc->tfm); + + tfm = desc->tfm; + desc->tfm = op->fallback.blk; + + ret = crypto_blkcipher_decrypt_iv(desc, dst, src, nbytes); + + desc->tfm = tfm; + return ret; +} + +static int fallback_blk_enc(struct blkcipher_desc *desc, + struct scatterlist *dst, struct scatterlist *src, + unsigned int nbytes) +{ + unsigned int ret; + struct crypto_blkcipher *tfm; + struct stmp3xxx_dcp_op *op = crypto_blkcipher_ctx(desc->tfm); + + tfm = desc->tfm; + desc->tfm = op->fallback.blk; + + ret = crypto_blkcipher_encrypt_iv(desc, dst, src, nbytes); + + desc->tfm = tfm; + return ret; +} + +static int fallback_init_blk(struct crypto_tfm *tfm) +{ + const char *name = tfm->__crt_alg->cra_name; + struct stmp3xxx_dcp_op *op = crypto_tfm_ctx(tfm); + + op->fallback.blk = crypto_alloc_blkcipher(name, 0, + CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK); + + if (IS_ERR(op->fallback.blk)) { + printk(KERN_ERR "Error allocating fallback algo %s\n", name); + return PTR_ERR(op->fallback.blk); + } + + return 0; +} + +static void fallback_exit_blk(struct crypto_tfm *tfm) +{ + struct stmp3xxx_dcp_op *op = crypto_tfm_ctx(tfm); + + crypto_free_blkcipher(op->fallback.blk); + op->fallback.blk = NULL; +} + +static int +dcp_aes_ecb_decrypt(struct blkcipher_desc *desc, + struct scatterlist *dst, struct scatterlist *src, + unsigned int nbytes) +{ + struct stmp3xxx_dcp *sdcp = global_sdcp; + struct stmp3xxx_dcp_op *op = crypto_blkcipher_ctx(desc->tfm); + struct blkcipher_walk walk; + int err; + + if (unlikely(op->cipher.keylen != AES_KEYSIZE_128)) + return fallback_blk_dec(desc, dst, src, nbytes); + + blkcipher_walk_init(&walk, dst, src, nbytes); + + /* key needs to be mapped only once */ + op->cipher.key_phys = dma_map_single(sdcp->dev, op->cipher.key, + AES_KEYSIZE_128, DMA_TO_DEVICE); + if (dma_mapping_error(sdcp->dev, op->cipher.key_phys)) { + dev_err(sdcp->dev, "Unable to map key\n"); + return -ENOMEM; + } + + err = blkcipher_walk_virt(desc, &walk); + while (err == 0 && (nbytes = walk.nbytes) > 0) { + op->src = walk.src.virt.addr, + op->dst = walk.dst.virt.addr; + op->flags = STMP3XXX_DCP_AES | STMP3XXX_DCP_DEC | + STMP3XXX_DCP_ECB; + op->len = nbytes - (nbytes % AES_KEYSIZE_128); + + /* map the data */ + op->src_phys = dma_map_single(sdcp->dev, op->src, op->len, + DMA_TO_DEVICE); + if (dma_mapping_error(sdcp->dev, op->src_phys)) { + dev_err(sdcp->dev, "Unable to map source\n"); + err = -ENOMEM; + break; + } + + op->dst_phys = dma_map_single(sdcp->dev, op->dst, op->len, + DMA_FROM_DEVICE); + if (dma_mapping_error(sdcp->dev, op->dst_phys)) { + dma_unmap_single(sdcp->dev, op->src_phys, op->len, + DMA_TO_DEVICE); + dev_err(sdcp->dev, "Unable to map dest\n"); + err = -ENOMEM; + break; + } + + /* perform! */ + dcp_perform_op(op); + + dma_unmap_single(sdcp->dev, op->dst_phys, op->len, + DMA_FROM_DEVICE); + dma_unmap_single(sdcp->dev, op->src_phys, op->len, + DMA_TO_DEVICE); + + nbytes -= op->len; + err = blkcipher_walk_done(desc, &walk, nbytes); + } + + dma_unmap_single(sdcp->dev, op->cipher.key_phys, AES_KEYSIZE_128, + DMA_TO_DEVICE); + + return err; +} + +static int +dcp_aes_ecb_encrypt(struct blkcipher_desc *desc, + struct scatterlist *dst, struct scatterlist *src, + unsigned int nbytes) +{ + struct stmp3xxx_dcp *sdcp = global_sdcp; + struct stmp3xxx_dcp_op *op = crypto_blkcipher_ctx(desc->tfm); + struct blkcipher_walk walk; + int err, ret; + + if (unlikely(op->cipher.keylen != AES_KEYSIZE_128)) + return fallback_blk_enc(desc, dst, src, nbytes); + + blkcipher_walk_init(&walk, dst, src, nbytes); + + /* key needs to be mapped only once */ + op->cipher.key_phys = dma_map_single(sdcp->dev, op->cipher.key, + AES_KEYSIZE_128, DMA_TO_DEVICE); + if (dma_mapping_error(sdcp->dev, op->cipher.key_phys)) { + dev_err(sdcp->dev, "Unable to map key\n"); + return -ENOMEM; + } + + err = blkcipher_walk_virt(desc, &walk); + + err = 0; + while (err == 0 && (nbytes = walk.nbytes) > 0) { + op->src = walk.src.virt.addr, + op->dst = walk.dst.virt.addr; + op->flags = STMP3XXX_DCP_AES | STMP3XXX_DCP_ENC | + STMP3XXX_DCP_ECB; + op->len = nbytes - (nbytes % AES_KEYSIZE_128); + + /* map the data */ + op->src_phys = dma_map_single(sdcp->dev, op->src, op->len, + DMA_TO_DEVICE); + if (dma_mapping_error(sdcp->dev, op->src_phys)) { + dev_err(sdcp->dev, "Unable to map source\n"); + err = -ENOMEM; + break; + } + + op->dst_phys = dma_map_single(sdcp->dev, op->dst, op->len, + DMA_FROM_DEVICE); + if (dma_mapping_error(sdcp->dev, op->dst_phys)) { + dma_unmap_single(sdcp->dev, op->src_phys, op->len, + DMA_TO_DEVICE); + dev_err(sdcp->dev, "Unable to map dest\n"); + err = -ENOMEM; + break; + } + + /* perform! */ + dcp_perform_op(op); + + dma_unmap_single(sdcp->dev, op->dst_phys, op->len, + DMA_FROM_DEVICE); + dma_unmap_single(sdcp->dev, op->src_phys, op->len, + DMA_TO_DEVICE); + + nbytes -= op->len; + ret = blkcipher_walk_done(desc, &walk, nbytes); + } + + dma_unmap_single(sdcp->dev, op->cipher.key_phys, AES_KEYSIZE_128, + DMA_TO_DEVICE); + + return err; +} + + +static struct crypto_alg dcp_aes_ecb_alg = { + .cra_name = "ecb(aes)", + .cra_driver_name = "dcp-ecb-aes", + .cra_priority = 400, + .cra_alignmask = 15, + .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER | + CRYPTO_ALG_NEED_FALLBACK, + .cra_init = fallback_init_blk, + .cra_exit = fallback_exit_blk, + .cra_blocksize = AES_KEYSIZE_128, + .cra_ctxsize = sizeof(struct stmp3xxx_dcp_op), + .cra_type = &crypto_blkcipher_type, + .cra_module = THIS_MODULE, + .cra_list = LIST_HEAD_INIT(dcp_aes_ecb_alg.cra_list), + .cra_u = { + .blkcipher = { + .min_keysize = AES_MIN_KEY_SIZE, + .max_keysize = AES_MAX_KEY_SIZE, + .setkey = dcp_aes_setkey_blk, + .encrypt = dcp_aes_ecb_encrypt, + .decrypt = dcp_aes_ecb_decrypt + } + } +}; + +static int +dcp_aes_cbc_decrypt(struct blkcipher_desc *desc, + struct scatterlist *dst, struct scatterlist *src, + unsigned int nbytes) +{ + struct stmp3xxx_dcp *sdcp = global_sdcp; + struct stmp3xxx_dcp_op *op = crypto_blkcipher_ctx(desc->tfm); + struct blkcipher_walk walk; + int err, blockno; + + if (unlikely(op->cipher.keylen != AES_KEYSIZE_128)) + return fallback_blk_dec(desc, dst, src, nbytes); + + blkcipher_walk_init(&walk, dst, src, nbytes); + + blockno = 0; + err = blkcipher_walk_virt(desc, &walk); + while (err == 0 && (nbytes = walk.nbytes) > 0) { + op->src = walk.src.virt.addr, + op->dst = walk.dst.virt.addr; + op->flags = STMP3XXX_DCP_AES | STMP3XXX_DCP_DEC | + STMP3XXX_DCP_CBC; + if (blockno == 0) { + op->flags |= STMP3XXX_DCP_CBC_INIT; + memcpy(op->cipher.key + AES_KEYSIZE_128, walk.iv, + AES_KEYSIZE_128); + } + op->len = nbytes - (nbytes % AES_KEYSIZE_128); + + /* key (+iv) needs to be mapped only once */ + op->cipher.key_phys = dma_map_single(sdcp->dev, op->cipher.key, + AES_KEYSIZE_128 * 2, DMA_BIDIRECTIONAL); + if (dma_mapping_error(sdcp->dev, op->cipher.key_phys)) { + dev_err(sdcp->dev, "Unable to map key\n"); + err = -ENOMEM; + break; + } + + /* map the data */ + op->src_phys = dma_map_single(sdcp->dev, op->src, op->len, + DMA_TO_DEVICE); + if (dma_mapping_error(sdcp->dev, op->src_phys)) { + dma_unmap_single(sdcp->dev, op->cipher.key_phys, + AES_KEYSIZE_128 * 2, DMA_BIDIRECTIONAL); + dev_err(sdcp->dev, "Unable to map source\n"); + err = -ENOMEM; + break; + } + + op->dst_phys = dma_map_single(sdcp->dev, op->dst, op->len, + DMA_FROM_DEVICE); + if (dma_mapping_error(sdcp->dev, op->dst_phys)) { + dma_unmap_single(sdcp->dev, op->cipher.key_phys, + AES_KEYSIZE_128 * 2, DMA_BIDIRECTIONAL); + dma_unmap_single(sdcp->dev, op->src_phys, op->len, + DMA_TO_DEVICE); + dev_err(sdcp->dev, "Unable to map dest\n"); + err = -ENOMEM; + break; + } + + /* perform! */ + dcp_perform_op(op); + + dma_unmap_single(sdcp->dev, op->cipher.key_phys, + AES_KEYSIZE_128 * 2, DMA_BIDIRECTIONAL); + dma_unmap_single(sdcp->dev, op->dst_phys, op->len, + DMA_FROM_DEVICE); + dma_unmap_single(sdcp->dev, op->src_phys, op->len, + DMA_TO_DEVICE); + + nbytes -= op->len; + err = blkcipher_walk_done(desc, &walk, nbytes); + + blockno++; + } + + return err; +} + +static int +dcp_aes_cbc_encrypt(struct blkcipher_desc *desc, + struct scatterlist *dst, struct scatterlist *src, + unsigned int nbytes) +{ + struct stmp3xxx_dcp *sdcp = global_sdcp; + struct stmp3xxx_dcp_op *op = crypto_blkcipher_ctx(desc->tfm); + struct blkcipher_walk walk; + int err, ret, blockno; + + if (unlikely(op->cipher.keylen != AES_KEYSIZE_128)) + return fallback_blk_enc(desc, dst, src, nbytes); + + blkcipher_walk_init(&walk, dst, src, nbytes); + + blockno = 0; + + err = blkcipher_walk_virt(desc, &walk); + while (err == 0 && (nbytes = walk.nbytes) > 0) { + op->src = walk.src.virt.addr, + op->dst = walk.dst.virt.addr; + op->flags = STMP3XXX_DCP_AES | STMP3XXX_DCP_ENC | + STMP3XXX_DCP_CBC; + if (blockno == 0) { + op->flags |= STMP3XXX_DCP_CBC_INIT; + memcpy(op->cipher.key + AES_KEYSIZE_128, walk.iv, + AES_KEYSIZE_128); + } + op->len = nbytes - (nbytes % AES_KEYSIZE_128); + + /* key needs to be mapped only once */ + op->cipher.key_phys = dma_map_single(sdcp->dev, op->cipher.key, + AES_KEYSIZE_128 * 2, DMA_BIDIRECTIONAL); + if (dma_mapping_error(sdcp->dev, op->cipher.key_phys)) { + dev_err(sdcp->dev, "Unable to map key\n"); + return -ENOMEM; + } + + /* map the data */ + op->src_phys = dma_map_single(sdcp->dev, op->src, op->len, + DMA_TO_DEVICE); + if (dma_mapping_error(sdcp->dev, op->src_phys)) { + dma_unmap_single(sdcp->dev, op->cipher.key_phys, + AES_KEYSIZE_128 * 2, DMA_BIDIRECTIONAL); + dev_err(sdcp->dev, "Unable to map source\n"); + err = -ENOMEM; + break; + } + + op->dst_phys = dma_map_single(sdcp->dev, op->dst, op->len, + DMA_FROM_DEVICE); + if (dma_mapping_error(sdcp->dev, op->dst_phys)) { + dma_unmap_single(sdcp->dev, op->cipher.key_phys, + AES_KEYSIZE_128 * 2, DMA_BIDIRECTIONAL); + dma_unmap_single(sdcp->dev, op->src_phys, op->len, + DMA_TO_DEVICE); + dev_err(sdcp->dev, "Unable to map dest\n"); + err = -ENOMEM; + break; + } + + /* perform! */ + dcp_perform_op(op); + + dma_unmap_single(sdcp->dev, op->cipher.key_phys, + AES_KEYSIZE_128 * 2, DMA_BIDIRECTIONAL); + dma_unmap_single(sdcp->dev, op->dst_phys, op->len, + DMA_FROM_DEVICE); + dma_unmap_single(sdcp->dev, op->src_phys, op->len, + DMA_TO_DEVICE); + + nbytes -= op->len; + ret = blkcipher_walk_done(desc, &walk, nbytes); + + blockno++; + } + + return err; +} + +static struct crypto_alg dcp_aes_cbc_alg = { + .cra_name = "cbc(aes)", + .cra_driver_name = "dcp-cbc-aes", + .cra_priority = 400, + .cra_alignmask = 15, + .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER | + CRYPTO_ALG_NEED_FALLBACK, + .cra_init = fallback_init_blk, + .cra_exit = fallback_exit_blk, + .cra_blocksize = AES_KEYSIZE_128, + .cra_ctxsize = sizeof(struct stmp3xxx_dcp_op), + .cra_type = &crypto_blkcipher_type, + .cra_module = THIS_MODULE, + .cra_list = LIST_HEAD_INIT(dcp_aes_cbc_alg.cra_list), + .cra_u = { + .blkcipher = { + .min_keysize = AES_MIN_KEY_SIZE, + .max_keysize = AES_MAX_KEY_SIZE, + .setkey = dcp_aes_setkey_blk, + .encrypt = dcp_aes_cbc_encrypt, + .decrypt = dcp_aes_cbc_decrypt, + .ivsize = AES_KEYSIZE_128, + } + } +}; + +#ifndef DISABLE_SHA1 + +static void dcp_perform_hash_op(struct stmp3xxx_dcp_hash_op *op) +{ + struct stmp3xxx_dcp *sdcp = global_sdcp; + struct mutex *mutex; + int chan; + struct stmp3xxx_dcp_hw_packet *pkt; + unsigned long timeout; + u32 stat; + int size1, descno; + + BUG_ON((op->flags & STMP3XXX_DCP_MODE_MASK) != STMP3XXX_DCP_SHA1); + + chan = HASH_CHAN; + + switch (op->flags & (STMP3XXX_DCP_INIT | STMP3XXX_DCP_UPDATE | + STMP3XXX_DCP_FINAL)) { + + case STMP3XXX_DCP_INIT | STMP3XXX_DCP_UPDATE: + + BUG_ON(op->len <= 1); + + pkt = &op->hw->pkt[0]; + pkt->pNext = 0; + pkt->pkt1 = BM_DCP_PACKET1_HASH_INIT | + BM_DCP_PACKET1_DECR_SEMAPHORE | + BM_DCP_PACKET1_INTERRUPT | + BM_DCP_PACKET1_ENABLE_HASH; + pkt->pkt2 = BF_DCP_PACKET2_HASH_SELECT( + BV_DCP_PACKET2_HASH_SELECT__SHA1); + pkt->pSrc = (u32)op->src_phys; + pkt->pDst = 0; + pkt->size = op->len - 1; + pkt->pPayload = 0; + pkt->stat = 0; + + /* save last byte */ + op->hw->rembuf[1] = ((u8 *)op->src)[op->len - 1]; + + descno = 1; + break; + + case STMP3XXX_DCP_UPDATE: + + BUG_ON(op->len <= 1); + + op->hw->rembuf[0] = op->hw->rembuf[1]; + + pkt = &op->hw->pkt[0]; + pkt->pNext = 0; + pkt->pkt1 = BM_DCP_PACKET1_CHAIN_CONTIGUOUS | + BM_DCP_PACKET1_ENABLE_HASH; + pkt->pkt2 = BF_DCP_PACKET2_HASH_SELECT( + BV_DCP_PACKET2_HASH_SELECT__SHA1); + pkt->pSrc = (u32)op->hw_phys + offsetof( + struct stmp3xxx_dcp_hash_coherent_block, rembuf); + pkt->pDst = 0; + pkt->size = 1; + pkt->pPayload = 0; + pkt->stat = 0; + + pkt = &op->hw->pkt[1]; + pkt->pNext = 0; + pkt->pkt1 = BM_DCP_PACKET1_DECR_SEMAPHORE | + BM_DCP_PACKET1_INTERRUPT | + BM_DCP_PACKET1_ENABLE_HASH; + pkt->pkt2 = BF_DCP_PACKET2_HASH_SELECT( + BV_DCP_PACKET2_HASH_SELECT__SHA1); + pkt->pSrc = (u32)op->src_phys; + pkt->pDst = 0; + pkt->size = op->len - 1; + pkt->pPayload = 0; + pkt->stat = 0; + + /* save last byte */ + op->hw->rembuf[1] = ((u8 *)op->src)[op->len - 1]; + + descno = 2; + + break; + + case STMP3XXX_DCP_FINAL: + + op->hw->rembuf[0] = op->hw->rembuf[1]; + + pkt = &op->hw->pkt[0]; + pkt->pNext = 0; + pkt->pkt1 = BM_DCP_PACKET1_HASH_TERM | + BM_DCP_PACKET1_DECR_SEMAPHORE | + BM_DCP_PACKET1_INTERRUPT | + BM_DCP_PACKET1_ENABLE_HASH; + pkt->pkt2 = BF_DCP_PACKET2_HASH_SELECT( + BV_DCP_PACKET2_HASH_SELECT__SHA1); + pkt->pSrc = (u32)op->hw_phys + offsetof( + struct stmp3xxx_dcp_hash_coherent_block, rembuf); + pkt->pDst = 0; + pkt->size = 1; + pkt->pPayload = (u32)op->hw_phys + offsetof( + struct stmp3xxx_dcp_hash_coherent_block, digest); + pkt->stat = 0; + + descno = 1; + + break; + + /* all others BUG */ + default: + BUG(); + return; + } + + mutex = &sdcp->op_mutex[chan]; + + /* submit the work */ + mutex_lock(mutex); + + HW_DCP_CHnSTAT_CLR(chan, -1); + + mb(); + /* Load the work packet pointer and bump the channel semaphore */ + HW_DCP_CHnCMDPTR_WR(chan, (u32)op->hw_phys + + offsetof(struct stmp3xxx_dcp_hash_coherent_block, pkt[0])); + + /* XXX wake from interrupt instead of looping */ + timeout = jiffies + msecs_to_jiffies(1000); + + HW_DCP_CHnSEMA_WR(chan, BF_DCP_CHnSEMA_INCREMENT(descno)); + + while (time_before(jiffies, timeout) && + ((HW_DCP_CHnSEMA_RD(chan) >> 16) & 0xff) != 0) + cpu_relax(); + + if (!time_before(jiffies, timeout)) { + dev_err(sdcp->dev, "Timeout while waiting STAT 0x%08x\n", + HW_DCP_STAT_RD()); + goto out; + } + + stat = HW_DCP_CHnSTAT_RD(chan); + if ((stat & 0xff) != 0) + dev_err(sdcp->dev, "Channel stat error 0x%02x\n", + HW_DCP_CHnSTAT_RD(chan) & 0xff); + +out: + mutex_unlock(mutex); + + mdelay(500); +} + +static int fallback_init_hash(struct crypto_tfm *tfm) +{ + const char *name = tfm->__crt_alg->cra_name; + struct stmp3xxx_dcp_hash_op *op = crypto_tfm_ctx(tfm); + struct stmp3xxx_dcp *sdcp = global_sdcp; + + op->fallback.hash = crypto_alloc_hash(name, 0, + CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK); + if (IS_ERR(op->fallback.hash)) { + printk(KERN_ERR "Error allocating fallback algo %s\n", name); + return PTR_ERR(op->fallback.hash); + } + + op->hw = dma_alloc_coherent(sdcp->dev, sizeof(*op->hw), &op->hw_phys, + GFP_KERNEL); + if (op->hw == NULL) { + printk(KERN_ERR "Error allocating coherent block for %s\n", + name); + crypto_free_hash(op->fallback.hash); + op->fallback.hash = NULL; + return -ENOMEM; + } + memset(op->hw, 0, sizeof(*op->hw)); + + return 0; +} + +static void fallback_exit_hash(struct crypto_tfm *tfm) +{ + struct stmp3xxx_dcp_hash_op *op = crypto_tfm_ctx(tfm); + struct stmp3xxx_dcp *sdcp = global_sdcp; + + dma_free_coherent(sdcp->dev, sizeof(*op->hw), op->hw, op->hw_phys); + crypto_free_hash(op->fallback.hash); + op->fallback.hash = NULL; +} + +static void dcp_sha1_init(struct crypto_tfm *tfm) +{ + struct stmp3xxx_dcp_hash_op *op = crypto_tfm_ctx(tfm); + + op->hash.init = 1; + memset(op->hw->rembuf, 0, sizeof(op->hw->rembuf)); + memset(op->hw->digest, 0, sizeof(op->hw->digest)); +} + +static void dcp_sha1_update(struct crypto_tfm *tfm, + const uint8_t *data, unsigned int length) +{ + struct stmp3xxx_dcp *sdcp = global_sdcp; + struct stmp3xxx_dcp_hash_op *op = crypto_tfm_ctx(tfm); + + op->src = (void *)data; + op->dst = NULL; + op->flags = STMP3XXX_DCP_SHA1 | STMP3XXX_DCP_UPDATE; + if (op->hash.init) { + op->hash.init = 0; + op->flags |= STMP3XXX_DCP_INIT; + } + op->len = length; + + /* map the data */ + op->src_phys = dma_map_single(sdcp->dev, op->src, op->len, + DMA_TO_DEVICE); + if (dma_mapping_error(sdcp->dev, op->src_phys)) { + dev_err(sdcp->dev, "Unable to map source\n"); + return; + } + op->dst_phys = 0; + + /* perform! */ + dcp_perform_hash_op(op); + + dma_unmap_single(sdcp->dev, op->src_phys, op->len, DMA_TO_DEVICE); +} + +static void dcp_sha1_final(struct crypto_tfm *tfm, uint8_t *out) +{ + struct stmp3xxx_dcp_hash_op *op = crypto_tfm_ctx(tfm); + int i; + const uint8_t *digest; + + op->src = NULL; + op->dst = NULL; + op->flags = STMP3XXX_DCP_SHA1 | STMP3XXX_DCP_FINAL; + op->len = 0; + + /* perform! */ + dcp_perform_hash_op(op); + + /* hardware reverses the digest (for some unexplicable reason) */ + digest = op->hw->digest + SHA1_DIGEST_SIZE; + for (i = 0; i < SHA1_DIGEST_SIZE; i++) + *out++ = *--digest; + memcpy(out, op->hw->digest, SHA1_DIGEST_SIZE); +} + +static struct crypto_alg dcp_sha1_alg = { + .cra_name = "sha1", + .cra_driver_name = "dcp-sha1", + .cra_priority = 300, + .cra_flags = CRYPTO_ALG_TYPE_DIGEST | + CRYPTO_ALG_NEED_FALLBACK, + .cra_blocksize = SHA1_BLOCK_SIZE, + .cra_ctxsize = sizeof(struct stmp3xxx_dcp_hash_op), + .cra_module = THIS_MODULE, + .cra_list = LIST_HEAD_INIT(dcp_sha1_alg.cra_list), + .cra_init = fallback_init_hash, + .cra_exit = fallback_exit_hash, + .cra_u = { + .digest = { + .dia_digestsize = SHA1_DIGEST_SIZE, + .dia_init = dcp_sha1_init, + .dia_update = dcp_sha1_update, + .dia_final = dcp_sha1_final, + } + } +}; +#endif + +static irqreturn_t dcp_common_irq(int irq, void *context) +{ + struct stmp3xxx_dcp *sdcp = context; + u32 msk; + + /* check */ + msk = HW_DCP_STAT_RD() & BF_DCP_STAT_IRQ(0x0f); + if (msk == 0) + return IRQ_NONE; + + /* clear this channel */ + HW_DCP_STAT_CLR(msk); + if (msk & BF_DCP_STAT_IRQ(0x01)) + sdcp->wait[0]++; + if (msk & BF_DCP_STAT_IRQ(0x02)) + sdcp->wait[1]++; + if (msk & BF_DCP_STAT_IRQ(0x04)) + sdcp->wait[2]++; + if (msk & BF_DCP_STAT_IRQ(0x08)) + sdcp->wait[3]++; + return IRQ_HANDLED; +} + +static irqreturn_t dcp_vmi_irq(int irq, void *context) +{ + return dcp_common_irq(irq, context); +} + +static irqreturn_t dcp_irq(int irq, void *context) +{ + return dcp_common_irq(irq, context); +} + +static int stmp3xxx_dcp_probe(struct platform_device *pdev) +{ + struct stmp3xxx_dcp *sdcp = NULL; + struct resource *r; + int i, ret; + + if (global_sdcp != NULL) { + dev_err(&pdev->dev, "Only one instance allowed\n"); + ret = -ENODEV; + goto err; + } + + /* allocate memory */ + sdcp = kzalloc(sizeof(*sdcp), GFP_KERNEL); + if (sdcp == NULL) { + dev_err(&pdev->dev, "Failed to allocate structure\n"); + ret = -ENOMEM; + goto err; + } + + sdcp->dev = &pdev->dev; + spin_lock_init(&sdcp->lock); + + for (i = 0; i < STMP3XXX_DCP_NUM_CHANNELS; i++) { + mutex_init(&sdcp->op_mutex[i]); + init_completion(&sdcp->op_wait[i]); + } + + platform_set_drvdata(pdev, sdcp); + + /* Soft reset and remove the clock gate */ + HW_DCP_CTRL_SET(BM_DCP_CTRL_SFTRST); + + /* At 24Mhz, it takes no more than 4 clocks (160 ns) Maximum for + * the part to reset, reading the register twice should + * be sufficient to get 4 clks delay. + */ + HW_DCP_CTRL_RD(); + HW_DCP_CTRL_RD(); + + HW_DCP_CTRL_CLR(BM_DCP_CTRL_SFTRST | BM_DCP_CTRL_CLKGATE); + + /* Initialize control registers */ + HW_DCP_CTRL_WR(STMP3XXX_DCP_CTRL_INIT); + HW_DCP_CHANNELCTRL_WR(STMP3XXX_DCP_CHANNELCTRL_INIT); + + /* We do not enable context switching. Give the context + * buffer pointer an illegal address so if context switching is + * inadvertantly enabled, the dcp will return an error instead of + * trashing good memory. The dcp dma cannot access rom, so any rom + * address will do. + */ + HW_DCP_CONTEXT_WR(0xFFFF0000); + + for (i = 0; i < STMP3XXX_DCP_NUM_CHANNELS; i++) + HW_DCP_CHnSTAT_CLR(i, -1); + HW_DCP_STAT_CLR(-1); + + r = platform_get_resource(pdev, IORESOURCE_IRQ, 0); + if (!r) { + dev_err(&pdev->dev, "can't get IRQ resource (0)\n"); + ret = -EIO; + goto err_unregister_sha1; + } + sdcp->dcp_vmi_irq = r->start; + ret = request_irq(sdcp->dcp_vmi_irq, dcp_vmi_irq, 0, "stmp3xxx-dcp", + sdcp); + if (ret != 0) { + dev_err(&pdev->dev, "can't request_irq (0)\n"); + goto err_unregister_sha1; + } + + r = platform_get_resource(pdev, IORESOURCE_IRQ, 1); + if (!r) { + dev_err(&pdev->dev, "can't get IRQ resource (1)\n"); + ret = -EIO; + goto err_free_irq0; + } + sdcp->dcp_irq = r->start; + ret = request_irq(sdcp->dcp_irq, dcp_irq, 0, "stmp3xxx-dcp", sdcp); + if (ret != 0) { + dev_err(&pdev->dev, "can't request_irq (1)\n"); + goto err_free_irq0; + } + + global_sdcp = sdcp; + + ret = crypto_register_alg(&dcp_aes_alg); + if (ret != 0) { + dev_err(&pdev->dev, "Failed to register aes crypto\n"); + goto err_kfree; + } + + ret = crypto_register_alg(&dcp_aes_ecb_alg); + if (ret != 0) { + dev_err(&pdev->dev, "Failed to register aes ecb crypto\n"); + goto err_unregister_aes; + } + + ret = crypto_register_alg(&dcp_aes_cbc_alg); + if (ret != 0) { + dev_err(&pdev->dev, "Failed to register aes cbc crypto\n"); + goto err_unregister_aes_ecb; + } + +#ifndef DISABLE_SHA1 + ret = crypto_register_alg(&dcp_sha1_alg); + if (ret != 0) { + dev_err(&pdev->dev, "Failed to register aes cbc crypto\n"); + goto err_unregister_aes_cbc; + } +#endif + + dev_notice(&pdev->dev, "DCP crypto enabled.!\n"); + return 0; + +err_free_irq0: + free_irq(sdcp->dcp_vmi_irq, sdcp); +err_unregister_sha1: +#ifndef DISABLE_SHA1 + crypto_unregister_alg(&dcp_sha1_alg); +#endif +err_unregister_aes_cbc: + crypto_unregister_alg(&dcp_aes_cbc_alg); +err_unregister_aes_ecb: + crypto_unregister_alg(&dcp_aes_ecb_alg); +err_unregister_aes: + crypto_unregister_alg(&dcp_aes_alg); +err_kfree: + kfree(sdcp); +err: + + return ret; +} + +static int stmp3xxx_dcp_remove(struct platform_device *pdev) +{ + struct stmp3xxx_dcp *sdcp; + + sdcp = platform_get_drvdata(pdev); + platform_set_drvdata(pdev, NULL); + + free_irq(sdcp->dcp_irq, sdcp); + free_irq(sdcp->dcp_vmi_irq, sdcp); +#ifndef DISABLE_SHA1 + crypto_unregister_alg(&dcp_sha1_alg); +#endif + crypto_unregister_alg(&dcp_aes_cbc_alg); + crypto_unregister_alg(&dcp_aes_ecb_alg); + crypto_unregister_alg(&dcp_aes_alg); + kfree(sdcp); + global_sdcp = NULL; + + return 0; +} + + +#ifdef CONFIG_PM +static int stmp3xxx_dcp_suspend(struct platform_device *pdev, + pm_message_t state) +{ + return 0; +} + +static int stmp3xxx_dcp_resume(struct platform_device *pdev) +{ + return 0; +} +#else +#define stmp3xxx_dcp_suspend NULL +#define stmp3xxx_dcp_resume NULL +#endif + +static struct platform_driver stmp3xxx_dcp_driver = { + .probe = stmp3xxx_dcp_probe, + .remove = stmp3xxx_dcp_remove, + .suspend = stmp3xxx_dcp_suspend, + .resume = stmp3xxx_dcp_resume, + .driver = { + .name = "stmp3xxx-dcp", + .owner = THIS_MODULE, + }, +}; + +static int __init +stmp3xxx_dcp_init(void) +{ + return platform_driver_register(&stmp3xxx_dcp_driver); +} + +static void __exit +stmp3xxx_dcp_exit(void) +{ + platform_driver_unregister(&stmp3xxx_dcp_driver); +} + +MODULE_AUTHOR("Pantelis Antoniou <pantelis@embeddedalley.com>"); +MODULE_DESCRIPTION("STMP3XXX DCP Crypto Driver"); +MODULE_LICENSE("GPL"); + +module_init(stmp3xxx_dcp_init); +module_exit(stmp3xxx_dcp_exit); |