crypto: s5p-sss - add S5PV210 advanced crypto engine support
This change adds support for AES encrypting and decrypting using
advanced crypto engine found on Samsung S5PV210 and S5PC110 SoCs.
Signed-off-by: Vladimir Zapolskiy <vzapolskiy@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/drivers/crypto/s5p-sss.c b/drivers/crypto/s5p-sss.c
new file mode 100644
index 0000000..8115417
--- /dev/null
+++ b/drivers/crypto/s5p-sss.c
@@ -0,0 +1,701 @@
+/*
+ * Cryptographic API.
+ *
+ * Support for Samsung S5PV210 HW acceleration.
+ *
+ * Copyright (C) 2011 NetUP Inc. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ *
+ */
+
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/clk.h>
+#include <linux/platform_device.h>
+#include <linux/scatterlist.h>
+#include <linux/dma-mapping.h>
+#include <linux/io.h>
+#include <linux/crypto.h>
+#include <linux/interrupt.h>
+
+#include <crypto/algapi.h>
+#include <crypto/aes.h>
+#include <crypto/ctr.h>
+
+#include <plat/cpu.h>
+#include <plat/dma.h>
+
+#define _SBF(s, v) ((v) << (s))
+#define _BIT(b) _SBF(b, 1)
+
+/* Feed control registers */
+#define SSS_REG_FCINTSTAT 0x0000
+#define SSS_FCINTSTAT_BRDMAINT _BIT(3)
+#define SSS_FCINTSTAT_BTDMAINT _BIT(2)
+#define SSS_FCINTSTAT_HRDMAINT _BIT(1)
+#define SSS_FCINTSTAT_PKDMAINT _BIT(0)
+
+#define SSS_REG_FCINTENSET 0x0004
+#define SSS_FCINTENSET_BRDMAINTENSET _BIT(3)
+#define SSS_FCINTENSET_BTDMAINTENSET _BIT(2)
+#define SSS_FCINTENSET_HRDMAINTENSET _BIT(1)
+#define SSS_FCINTENSET_PKDMAINTENSET _BIT(0)
+
+#define SSS_REG_FCINTENCLR 0x0008
+#define SSS_FCINTENCLR_BRDMAINTENCLR _BIT(3)
+#define SSS_FCINTENCLR_BTDMAINTENCLR _BIT(2)
+#define SSS_FCINTENCLR_HRDMAINTENCLR _BIT(1)
+#define SSS_FCINTENCLR_PKDMAINTENCLR _BIT(0)
+
+#define SSS_REG_FCINTPEND 0x000C
+#define SSS_FCINTPEND_BRDMAINTP _BIT(3)
+#define SSS_FCINTPEND_BTDMAINTP _BIT(2)
+#define SSS_FCINTPEND_HRDMAINTP _BIT(1)
+#define SSS_FCINTPEND_PKDMAINTP _BIT(0)
+
+#define SSS_REG_FCFIFOSTAT 0x0010
+#define SSS_FCFIFOSTAT_BRFIFOFUL _BIT(7)
+#define SSS_FCFIFOSTAT_BRFIFOEMP _BIT(6)
+#define SSS_FCFIFOSTAT_BTFIFOFUL _BIT(5)
+#define SSS_FCFIFOSTAT_BTFIFOEMP _BIT(4)
+#define SSS_FCFIFOSTAT_HRFIFOFUL _BIT(3)
+#define SSS_FCFIFOSTAT_HRFIFOEMP _BIT(2)
+#define SSS_FCFIFOSTAT_PKFIFOFUL _BIT(1)
+#define SSS_FCFIFOSTAT_PKFIFOEMP _BIT(0)
+
+#define SSS_REG_FCFIFOCTRL 0x0014
+#define SSS_FCFIFOCTRL_DESSEL _BIT(2)
+#define SSS_HASHIN_INDEPENDENT _SBF(0, 0x00)
+#define SSS_HASHIN_CIPHER_INPUT _SBF(0, 0x01)
+#define SSS_HASHIN_CIPHER_OUTPUT _SBF(0, 0x02)
+
+#define SSS_REG_FCBRDMAS 0x0020
+#define SSS_REG_FCBRDMAL 0x0024
+#define SSS_REG_FCBRDMAC 0x0028
+#define SSS_FCBRDMAC_BYTESWAP _BIT(1)
+#define SSS_FCBRDMAC_FLUSH _BIT(0)
+
+#define SSS_REG_FCBTDMAS 0x0030
+#define SSS_REG_FCBTDMAL 0x0034
+#define SSS_REG_FCBTDMAC 0x0038
+#define SSS_FCBTDMAC_BYTESWAP _BIT(1)
+#define SSS_FCBTDMAC_FLUSH _BIT(0)
+
+#define SSS_REG_FCHRDMAS 0x0040
+#define SSS_REG_FCHRDMAL 0x0044
+#define SSS_REG_FCHRDMAC 0x0048
+#define SSS_FCHRDMAC_BYTESWAP _BIT(1)
+#define SSS_FCHRDMAC_FLUSH _BIT(0)
+
+#define SSS_REG_FCPKDMAS 0x0050
+#define SSS_REG_FCPKDMAL 0x0054
+#define SSS_REG_FCPKDMAC 0x0058
+#define SSS_FCPKDMAC_BYTESWAP _BIT(3)
+#define SSS_FCPKDMAC_DESCEND _BIT(2)
+#define SSS_FCPKDMAC_TRANSMIT _BIT(1)
+#define SSS_FCPKDMAC_FLUSH _BIT(0)
+
+#define SSS_REG_FCPKDMAO 0x005C
+
+/* AES registers */
+#define SSS_REG_AES_CONTROL 0x4000
+#define SSS_AES_BYTESWAP_DI _BIT(11)
+#define SSS_AES_BYTESWAP_DO _BIT(10)
+#define SSS_AES_BYTESWAP_IV _BIT(9)
+#define SSS_AES_BYTESWAP_CNT _BIT(8)
+#define SSS_AES_BYTESWAP_KEY _BIT(7)
+#define SSS_AES_KEY_CHANGE_MODE _BIT(6)
+#define SSS_AES_KEY_SIZE_128 _SBF(4, 0x00)
+#define SSS_AES_KEY_SIZE_192 _SBF(4, 0x01)
+#define SSS_AES_KEY_SIZE_256 _SBF(4, 0x02)
+#define SSS_AES_FIFO_MODE _BIT(3)
+#define SSS_AES_CHAIN_MODE_ECB _SBF(1, 0x00)
+#define SSS_AES_CHAIN_MODE_CBC _SBF(1, 0x01)
+#define SSS_AES_CHAIN_MODE_CTR _SBF(1, 0x02)
+#define SSS_AES_MODE_DECRYPT _BIT(0)
+
+#define SSS_REG_AES_STATUS 0x4004
+#define SSS_AES_BUSY _BIT(2)
+#define SSS_AES_INPUT_READY _BIT(1)
+#define SSS_AES_OUTPUT_READY _BIT(0)
+
+#define SSS_REG_AES_IN_DATA(s) (0x4010 + (s << 2))
+#define SSS_REG_AES_OUT_DATA(s) (0x4020 + (s << 2))
+#define SSS_REG_AES_IV_DATA(s) (0x4030 + (s << 2))
+#define SSS_REG_AES_CNT_DATA(s) (0x4040 + (s << 2))
+#define SSS_REG_AES_KEY_DATA(s) (0x4080 + (s << 2))
+
+#define SSS_REG(dev, reg) ((dev)->ioaddr + (SSS_REG_##reg))
+#define SSS_READ(dev, reg) __raw_readl(SSS_REG(dev, reg))
+#define SSS_WRITE(dev, reg, val) __raw_writel((val), SSS_REG(dev, reg))
+
+/* HW engine modes */
+#define FLAGS_AES_DECRYPT _BIT(0)
+#define FLAGS_AES_MODE_MASK _SBF(1, 0x03)
+#define FLAGS_AES_CBC _SBF(1, 0x01)
+#define FLAGS_AES_CTR _SBF(1, 0x02)
+
+#define AES_KEY_LEN 16
+#define CRYPTO_QUEUE_LEN 1
+
+struct s5p_aes_reqctx {
+ unsigned long mode;
+};
+
+struct s5p_aes_ctx {
+ struct s5p_aes_dev *dev;
+
+ uint8_t aes_key[AES_MAX_KEY_SIZE];
+ uint8_t nonce[CTR_RFC3686_NONCE_SIZE];
+ int keylen;
+};
+
+struct s5p_aes_dev {
+ struct device *dev;
+ struct clk *clk;
+ void __iomem *ioaddr;
+ int irq_hash;
+ int irq_fc;
+
+ struct ablkcipher_request *req;
+ struct s5p_aes_ctx *ctx;
+ struct scatterlist *sg_src;
+ struct scatterlist *sg_dst;
+
+ struct tasklet_struct tasklet;
+ struct crypto_queue queue;
+ bool busy;
+ spinlock_t lock;
+};
+
+static struct s5p_aes_dev *s5p_dev;
+
+static void s5p_set_dma_indata(struct s5p_aes_dev *dev, struct scatterlist *sg)
+{
+ SSS_WRITE(dev, FCBRDMAS, sg_dma_address(sg));
+ SSS_WRITE(dev, FCBRDMAL, sg_dma_len(sg));
+}
+
+static void s5p_set_dma_outdata(struct s5p_aes_dev *dev, struct scatterlist *sg)
+{
+ SSS_WRITE(dev, FCBTDMAS, sg_dma_address(sg));
+ SSS_WRITE(dev, FCBTDMAL, sg_dma_len(sg));
+}
+
+static void s5p_aes_complete(struct s5p_aes_dev *dev, int err)
+{
+ /* holding a lock outside */
+ dev->req->base.complete(&dev->req->base, err);
+ dev->busy = false;
+}
+
+static void s5p_unset_outdata(struct s5p_aes_dev *dev)
+{
+ dma_unmap_sg(dev->dev, dev->sg_dst, 1, DMA_FROM_DEVICE);
+}
+
+static void s5p_unset_indata(struct s5p_aes_dev *dev)
+{
+ dma_unmap_sg(dev->dev, dev->sg_src, 1, DMA_TO_DEVICE);
+}
+
+static int s5p_set_outdata(struct s5p_aes_dev *dev, struct scatterlist *sg)
+{
+ int err;
+
+ if (!IS_ALIGNED(sg_dma_len(sg), AES_BLOCK_SIZE)) {
+ err = -EINVAL;
+ goto exit;
+ }
+ if (!sg_dma_len(sg)) {
+ err = -EINVAL;
+ goto exit;
+ }
+
+ err = dma_map_sg(dev->dev, sg, 1, DMA_FROM_DEVICE);
+ if (!err) {
+ err = -ENOMEM;
+ goto exit;
+ }
+
+ dev->sg_dst = sg;
+ err = 0;
+
+ exit:
+ return err;
+}
+
+static int s5p_set_indata(struct s5p_aes_dev *dev, struct scatterlist *sg)
+{
+ int err;
+
+ if (!IS_ALIGNED(sg_dma_len(sg), AES_BLOCK_SIZE)) {
+ err = -EINVAL;
+ goto exit;
+ }
+ if (!sg_dma_len(sg)) {
+ err = -EINVAL;
+ goto exit;
+ }
+
+ err = dma_map_sg(dev->dev, sg, 1, DMA_TO_DEVICE);
+ if (!err) {
+ err = -ENOMEM;
+ goto exit;
+ }
+
+ dev->sg_src = sg;
+ err = 0;
+
+ exit:
+ return err;
+}
+
+static void s5p_aes_tx(struct s5p_aes_dev *dev)
+{
+ int err = 0;
+
+ s5p_unset_outdata(dev);
+
+ if (!sg_is_last(dev->sg_dst)) {
+ err = s5p_set_outdata(dev, sg_next(dev->sg_dst));
+ if (err) {
+ s5p_aes_complete(dev, err);
+ return;
+ }
+
+ s5p_set_dma_outdata(dev, dev->sg_dst);
+ } else
+ s5p_aes_complete(dev, err);
+}
+
+static void s5p_aes_rx(struct s5p_aes_dev *dev)
+{
+ int err;
+
+ s5p_unset_indata(dev);
+
+ if (!sg_is_last(dev->sg_src)) {
+ err = s5p_set_indata(dev, sg_next(dev->sg_src));
+ if (err) {
+ s5p_aes_complete(dev, err);
+ return;
+ }
+
+ s5p_set_dma_indata(dev, dev->sg_src);
+ }
+}
+
+static irqreturn_t s5p_aes_interrupt(int irq, void *dev_id)
+{
+ struct platform_device *pdev = dev_id;
+ struct s5p_aes_dev *dev = platform_get_drvdata(pdev);
+ uint32_t status;
+ unsigned long flags;
+
+ spin_lock_irqsave(&dev->lock, flags);
+
+ if (irq == dev->irq_fc) {
+ status = SSS_READ(dev, FCINTSTAT);
+ if (status & SSS_FCINTSTAT_BRDMAINT)
+ s5p_aes_rx(dev);
+ if (status & SSS_FCINTSTAT_BTDMAINT)
+ s5p_aes_tx(dev);
+
+ SSS_WRITE(dev, FCINTPEND, status);
+ }
+
+ spin_unlock_irqrestore(&dev->lock, flags);
+
+ return IRQ_HANDLED;
+}
+
+static void s5p_set_aes(struct s5p_aes_dev *dev,
+ uint8_t *key, uint8_t *iv, unsigned int keylen)
+{
+ void __iomem *keystart;
+
+ memcpy(dev->ioaddr + SSS_REG_AES_IV_DATA(0), iv, 0x10);
+
+ if (keylen == AES_KEYSIZE_256)
+ keystart = dev->ioaddr + SSS_REG_AES_KEY_DATA(0);
+ else if (keylen == AES_KEYSIZE_192)
+ keystart = dev->ioaddr + SSS_REG_AES_KEY_DATA(2);
+ else
+ keystart = dev->ioaddr + SSS_REG_AES_KEY_DATA(4);
+
+ memcpy(keystart, key, keylen);
+}
+
+static void s5p_aes_crypt_start(struct s5p_aes_dev *dev, unsigned long mode)
+{
+ struct ablkcipher_request *req = dev->req;
+
+ uint32_t aes_control;
+ int err;
+ unsigned long flags;
+
+ aes_control = SSS_AES_KEY_CHANGE_MODE;
+ if (mode & FLAGS_AES_DECRYPT)
+ aes_control |= SSS_AES_MODE_DECRYPT;
+
+ if ((mode & FLAGS_AES_MODE_MASK) == FLAGS_AES_CBC)
+ aes_control |= SSS_AES_CHAIN_MODE_CBC;
+ else if ((mode & FLAGS_AES_MODE_MASK) == FLAGS_AES_CTR)
+ aes_control |= SSS_AES_CHAIN_MODE_CTR;
+
+ if (dev->ctx->keylen == AES_KEYSIZE_192)
+ aes_control |= SSS_AES_KEY_SIZE_192;
+ else if (dev->ctx->keylen == AES_KEYSIZE_256)
+ aes_control |= SSS_AES_KEY_SIZE_256;
+
+ aes_control |= SSS_AES_FIFO_MODE;
+
+ /* as a variant it is possible to use byte swapping on DMA side */
+ aes_control |= SSS_AES_BYTESWAP_DI
+ | SSS_AES_BYTESWAP_DO
+ | SSS_AES_BYTESWAP_IV
+ | SSS_AES_BYTESWAP_KEY
+ | SSS_AES_BYTESWAP_CNT;
+
+ spin_lock_irqsave(&dev->lock, flags);
+
+ SSS_WRITE(dev, FCINTENCLR,
+ SSS_FCINTENCLR_BTDMAINTENCLR | SSS_FCINTENCLR_BRDMAINTENCLR);
+ SSS_WRITE(dev, FCFIFOCTRL, 0x00);
+
+ err = s5p_set_indata(dev, req->src);
+ if (err)
+ goto indata_error;
+
+ err = s5p_set_outdata(dev, req->dst);
+ if (err)
+ goto outdata_error;
+
+ SSS_WRITE(dev, AES_CONTROL, aes_control);
+ s5p_set_aes(dev, dev->ctx->aes_key, req->info, dev->ctx->keylen);
+
+ s5p_set_dma_indata(dev, req->src);
+ s5p_set_dma_outdata(dev, req->dst);
+
+ SSS_WRITE(dev, FCINTENSET,
+ SSS_FCINTENSET_BTDMAINTENSET | SSS_FCINTENSET_BRDMAINTENSET);
+
+ spin_unlock_irqrestore(&dev->lock, flags);
+
+ return;
+
+ outdata_error:
+ s5p_unset_indata(dev);
+
+ indata_error:
+ s5p_aes_complete(dev, err);
+ spin_unlock_irqrestore(&dev->lock, flags);
+}
+
+static void s5p_tasklet_cb(unsigned long data)
+{
+ struct s5p_aes_dev *dev = (struct s5p_aes_dev *)data;
+ struct crypto_async_request *async_req, *backlog;
+ struct s5p_aes_reqctx *reqctx;
+ unsigned long flags;
+
+ spin_lock_irqsave(&dev->lock, flags);
+ backlog = crypto_get_backlog(&dev->queue);
+ async_req = crypto_dequeue_request(&dev->queue);
+ spin_unlock_irqrestore(&dev->lock, flags);
+
+ if (!async_req)
+ return;
+
+ if (backlog)
+ backlog->complete(backlog, -EINPROGRESS);
+
+ dev->req = ablkcipher_request_cast(async_req);
+ dev->ctx = crypto_tfm_ctx(dev->req->base.tfm);
+ reqctx = ablkcipher_request_ctx(dev->req);
+
+ s5p_aes_crypt_start(dev, reqctx->mode);
+}
+
+static int s5p_aes_handle_req(struct s5p_aes_dev *dev,
+ struct ablkcipher_request *req)
+{
+ unsigned long flags;
+ int err;
+
+ spin_lock_irqsave(&dev->lock, flags);
+ if (dev->busy) {
+ err = -EAGAIN;
+ spin_unlock_irqrestore(&dev->lock, flags);
+ goto exit;
+ }
+ dev->busy = true;
+
+ err = ablkcipher_enqueue_request(&dev->queue, req);
+ spin_unlock_irqrestore(&dev->lock, flags);
+
+ tasklet_schedule(&dev->tasklet);
+
+ exit:
+ return err;
+}
+
+static int s5p_aes_crypt(struct ablkcipher_request *req, unsigned long mode)
+{
+ struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
+ struct s5p_aes_ctx *ctx = crypto_ablkcipher_ctx(tfm);
+ struct s5p_aes_reqctx *reqctx = ablkcipher_request_ctx(req);
+ struct s5p_aes_dev *dev = ctx->dev;
+
+ if (!IS_ALIGNED(req->nbytes, AES_BLOCK_SIZE)) {
+ pr_err("request size is not exact amount of AES blocks\n");
+ return -EINVAL;
+ }
+
+ reqctx->mode = mode;
+
+ return s5p_aes_handle_req(dev, req);
+}
+
+static int s5p_aes_setkey(struct crypto_ablkcipher *cipher,
+ const uint8_t *key, unsigned int keylen)
+{
+ struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher);
+ struct s5p_aes_ctx *ctx = crypto_tfm_ctx(tfm);
+
+ if (keylen != AES_KEYSIZE_128 &&
+ keylen != AES_KEYSIZE_192 &&
+ keylen != AES_KEYSIZE_256)
+ return -EINVAL;
+
+ memcpy(ctx->aes_key, key, keylen);
+ ctx->keylen = keylen;
+
+ return 0;
+}
+
+static int s5p_aes_ecb_encrypt(struct ablkcipher_request *req)
+{
+ return s5p_aes_crypt(req, 0);
+}
+
+static int s5p_aes_ecb_decrypt(struct ablkcipher_request *req)
+{
+ return s5p_aes_crypt(req, FLAGS_AES_DECRYPT);
+}
+
+static int s5p_aes_cbc_encrypt(struct ablkcipher_request *req)
+{
+ return s5p_aes_crypt(req, FLAGS_AES_CBC);
+}
+
+static int s5p_aes_cbc_decrypt(struct ablkcipher_request *req)
+{
+ return s5p_aes_crypt(req, FLAGS_AES_DECRYPT | FLAGS_AES_CBC);
+}
+
+static int s5p_aes_cra_init(struct crypto_tfm *tfm)
+{
+ struct s5p_aes_ctx *ctx = crypto_tfm_ctx(tfm);
+
+ ctx->dev = s5p_dev;
+ tfm->crt_ablkcipher.reqsize = sizeof(struct s5p_aes_reqctx);
+
+ return 0;
+}
+
+static struct crypto_alg algs[] = {
+ {
+ .cra_name = "ecb(aes)",
+ .cra_driver_name = "ecb-aes-s5p",
+ .cra_priority = 100,
+ .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
+ CRYPTO_ALG_ASYNC,
+ .cra_blocksize = AES_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct s5p_aes_ctx),
+ .cra_alignmask = 0x0f,
+ .cra_type = &crypto_ablkcipher_type,
+ .cra_module = THIS_MODULE,
+ .cra_init = s5p_aes_cra_init,
+ .cra_u.ablkcipher = {
+ .min_keysize = AES_MIN_KEY_SIZE,
+ .max_keysize = AES_MAX_KEY_SIZE,
+ .setkey = s5p_aes_setkey,
+ .encrypt = s5p_aes_ecb_encrypt,
+ .decrypt = s5p_aes_ecb_decrypt,
+ }
+ },
+ {
+ .cra_name = "cbc(aes)",
+ .cra_driver_name = "cbc-aes-s5p",
+ .cra_priority = 100,
+ .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
+ CRYPTO_ALG_ASYNC,
+ .cra_blocksize = AES_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct s5p_aes_ctx),
+ .cra_alignmask = 0x0f,
+ .cra_type = &crypto_ablkcipher_type,
+ .cra_module = THIS_MODULE,
+ .cra_init = s5p_aes_cra_init,
+ .cra_u.ablkcipher = {
+ .min_keysize = AES_MIN_KEY_SIZE,
+ .max_keysize = AES_MAX_KEY_SIZE,
+ .ivsize = AES_BLOCK_SIZE,
+ .setkey = s5p_aes_setkey,
+ .encrypt = s5p_aes_cbc_encrypt,
+ .decrypt = s5p_aes_cbc_decrypt,
+ }
+ },
+};
+
+static int s5p_aes_probe(struct platform_device *pdev)
+{
+ int i, j, err = -ENODEV;
+ struct s5p_aes_dev *pdata;
+ struct device *dev = &pdev->dev;
+ struct resource *res;
+
+ if (s5p_dev)
+ return -EEXIST;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res)
+ return -ENODEV;
+
+ pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata)
+ return -ENOMEM;
+
+ if (!devm_request_mem_region(dev, res->start,
+ resource_size(res), pdev->name))
+ return -EBUSY;
+
+ pdata->clk = clk_get(dev, "secss");
+ if (IS_ERR(pdata->clk)) {
+ dev_err(dev, "failed to find secss clock source\n");
+ return -ENOENT;
+ }
+
+ clk_enable(pdata->clk);
+
+ spin_lock_init(&pdata->lock);
+ pdata->ioaddr = devm_ioremap(dev, res->start,
+ resource_size(res));
+
+ pdata->irq_hash = platform_get_irq_byname(pdev, "hash");
+ if (pdata->irq_hash < 0) {
+ err = pdata->irq_hash;
+ dev_warn(dev, "hash interrupt is not available.\n");
+ goto err_irq;
+ }
+ err = devm_request_irq(dev, pdata->irq_hash, s5p_aes_interrupt,
+ IRQF_SHARED, pdev->name, pdev);
+ if (err < 0) {
+ dev_warn(dev, "hash interrupt is not available.\n");
+ goto err_irq;
+ }
+
+ pdata->irq_fc = platform_get_irq_byname(pdev, "feed control");
+ if (pdata->irq_fc < 0) {
+ err = pdata->irq_fc;
+ dev_warn(dev, "feed control interrupt is not available.\n");
+ goto err_irq;
+ }
+ err = devm_request_irq(dev, pdata->irq_fc, s5p_aes_interrupt,
+ IRQF_SHARED, pdev->name, pdev);
+ if (err < 0) {
+ dev_warn(dev, "feed control interrupt is not available.\n");
+ goto err_irq;
+ }
+
+ pdata->dev = dev;
+ platform_set_drvdata(pdev, pdata);
+ s5p_dev = pdata;
+
+ tasklet_init(&pdata->tasklet, s5p_tasklet_cb, (unsigned long)pdata);
+ crypto_init_queue(&pdata->queue, CRYPTO_QUEUE_LEN);
+
+ for (i = 0; i < ARRAY_SIZE(algs); i++) {
+ INIT_LIST_HEAD(&algs[i].cra_list);
+ err = crypto_register_alg(&algs[i]);
+ if (err)
+ goto err_algs;
+ }
+
+ pr_info("s5p-sss driver registered\n");
+
+ return 0;
+
+ err_algs:
+ dev_err(dev, "can't register '%s': %d\n", algs[i].cra_name, err);
+
+ for (j = 0; j < i; j++)
+ crypto_unregister_alg(&algs[j]);
+
+ tasklet_kill(&pdata->tasklet);
+
+ err_irq:
+ clk_disable(pdata->clk);
+ clk_put(pdata->clk);
+
+ s5p_dev = NULL;
+ platform_set_drvdata(pdev, NULL);
+
+ return err;
+}
+
+static int s5p_aes_remove(struct platform_device *pdev)
+{
+ struct s5p_aes_dev *pdata = platform_get_drvdata(pdev);
+ int i;
+
+ if (!pdata)
+ return -ENODEV;
+
+ for (i = 0; i < ARRAY_SIZE(algs); i++)
+ crypto_unregister_alg(&algs[i]);
+
+ tasklet_kill(&pdata->tasklet);
+
+ clk_disable(pdata->clk);
+ clk_put(pdata->clk);
+
+ s5p_dev = NULL;
+ platform_set_drvdata(pdev, NULL);
+
+ return 0;
+}
+
+static struct platform_driver s5p_aes_crypto = {
+ .probe = s5p_aes_probe,
+ .remove = s5p_aes_remove,
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "s5p-secss",
+ },
+};
+
+static int __init s5p_aes_mod_init(void)
+{
+ return platform_driver_register(&s5p_aes_crypto);
+}
+
+static void __exit s5p_aes_mod_exit(void)
+{
+ platform_driver_unregister(&s5p_aes_crypto);
+}
+
+module_init(s5p_aes_mod_init);
+module_exit(s5p_aes_mod_exit);
+
+MODULE_DESCRIPTION("S5PV210 AES hw acceleration support.");
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Vladimir Zapolskiy <vzapolskiy@gmail.com>");