This patch adds support for the SHA1/MD5 hw module acceleration on
OMAP2420.
TODO:
- Add DMA transfer.
- Add support for OMAP1, OMAP2430, OMAP3.
Signed-off-by: David Cohen <david.cohen@xxxxxxxxxxx>
---
arch/arm/mach-omap1/devices.c | 29 ++
arch/arm/mach-omap2/devices.c | 29 ++
drivers/crypto/Kconfig | 9 +
drivers/crypto/Makefile | 1 +
drivers/crypto/omap-sha1-md5.c | 574 ++++++++++++++++++++++++++++++++++++++++
5 files changed, 642 insertions(+), 0 deletions(-)
create mode 100644 drivers/crypto/omap-sha1-md5.c
diff --git a/arch/arm/mach-omap1/devices.c b/arch/arm/mach-omap1/devices.c
index da8a3ac..5e7a943 100644
--- a/arch/arm/mach-omap1/devices.c
+++ b/arch/arm/mach-omap1/devices.c
@@ -137,6 +137,34 @@ static inline void omap_init_sti(void)
static inline void omap_init_sti(void) {}
#endif
+#ifdef CONFIG_OMAP_SHA1_MD5
+static struct resource sha1_md5_resources[] = {
+ {
+ .start = OMAP16XX_SEC_SHA1MD5,
+ .end = OMAP16XX_SEC_SHA1MD5 + 0x7ff,
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ .start = INT_1610_SHA1MD5,
+ .flags = IORESOURCE_IRQ,
+ }
+};
+
+static struct platform_device sha1_md5_device = {
+ .name = "OMAP SHA1/MD5",
+ .id = -1,
+ .num_resources = ARRAY_SIZE(sha1_md5_resources),
+ .resource = sha1_md5_resources,
+};
+
+static void omap_init_sha1_md5(void)
+{
+ platform_device_register(&sha1_md5_device);
+}
+#else
+static inline void omap_init_sha1_md5(void) { }
+#endif
+
/*-------------------------------------------------------------------------*/
/*
@@ -168,6 +196,7 @@ static int __init omap1_init_devices(void)
omap_init_mbox();
omap_init_rtc();
omap_init_sti();
+ omap_init_sha1_md5();
return 0;
}
diff --git a/arch/arm/mach-omap2/devices.c b/arch/arm/mach-omap2/devices.c
index 85bc01a..5fbeeb3 100644
--- a/arch/arm/mach-omap2/devices.c
+++ b/arch/arm/mach-omap2/devices.c
@@ -221,6 +221,34 @@ void omap_init_eac(struct eac_platform_data *pdata)
void omap_init_eac(struct eac_platform_data *pdata) {}
#endif
+#ifdef CONFIG_OMAP_SHA1_MD5
+static struct resource sha1_md5_resources[] = {
+ {
+ .start = OMAP2420_SEC_SHA1MD5_BASE,
+ .end = OMAP2420_SEC_SHA1MD5_BASE + 0x64,
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ .start = INT_24XX_SHA1MD5,
+ .flags = IORESOURCE_IRQ,
+ }
+};
+
+static struct platform_device sha1_md5_device = {
+ .name = "OMAP SHA1/MD5",
+ .id = -1,
+ .num_resources = ARRAY_SIZE(sha1_md5_resources),
+ .resource = sha1_md5_resources,
+};
+
+static void omap_init_sha1_md5(void)
+{
+ platform_device_register(&sha1_md5_device);
+}
+#else
+static inline void omap_init_sha1_md5(void) { }
+#endif
+
/*-------------------------------------------------------------------------*/
static int __init omap2_init_devices(void)
@@ -232,6 +260,7 @@ static int __init omap2_init_devices(void)
omap_init_mbox();
omap_init_mcspi();
omap_init_sti();
+ omap_init_sha1_md5();
return 0;
}
diff --git a/drivers/crypto/Kconfig b/drivers/crypto/Kconfig
index 5fd6688..87f1789 100644
--- a/drivers/crypto/Kconfig
+++ b/drivers/crypto/Kconfig
@@ -83,4 +83,13 @@ config ZCRYPT_MONOLITHIC
that contains all parts of the crypto device driver (ap bus,
request router and all the card drivers).
+config OMAP_SHA1_MD5
+ tristate "Support for OMAP SHA1/MD5 hw engine"
+ depends on ARCH_OMAP && CRYPTO_SHA1 && CRYPTO_MD5
+ help
+ OMAP processors have SHA1/MD5 module accelerator. Select this if you
+ want to use the OMAP module for SHA1/MD5 algorithms.
+
+ If unsure say M. The compiled module will be called omap-sha1-md5.ko
+
endif # CRYPTO_HW
diff --git a/drivers/crypto/Makefile b/drivers/crypto/Makefile
index d070030..daa0e15 100644
--- a/drivers/crypto/Makefile
+++ b/drivers/crypto/Makefile
@@ -1,3 +1,4 @@
obj-$(CONFIG_CRYPTO_DEV_PADLOCK_AES) += padlock-aes.o
obj-$(CONFIG_CRYPTO_DEV_PADLOCK_SHA) += padlock-sha.o
obj-$(CONFIG_CRYPTO_DEV_GEODE) += geode-aes.o
+obj-$(CONFIG_OMAP_SHA1_MD5) += omap-sha1-md5.o
diff --git a/drivers/crypto/omap-sha1-md5.c b/drivers/crypto/omap-sha1-md5.c
new file mode 100644
index 0000000..0542800
--- /dev/null
+++ b/drivers/crypto/omap-sha1-md5.c
@@ -0,0 +1,574 @@
+/*
+ * Cryptographic API.
+ *
+ * Support for OMAP SHA1/MD5 HW acceleration.
+ *
+ * Copyright (c) 2007 David Cohen <david.cohen@xxxxxxxxxxx>
+ *
+ * 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.
+ *
+ * This driver is based on padlock-sha.c driver.
+ */
+
+#include <asm/arch-omap/irqs.h>
+#include <crypto/algapi.h>
+#include <crypto/sha.h>
+#include <linux/err.h>
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/cryptohash.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/clk.h>
+#include <linux/irq.h>
+#include <linux/platform_device.h>
+#include <linux/scatterlist.h>
+
+#define SHA_REG_DIGEST(x) (0x00 + ((x) * 0x04))
+#define SHA_REG_DIN(x) (0x1C + ((x) * 0x04))
+
+#define SHA1_MD5_BLOCK_SIZE SHA1_BLOCK_SIZE
+#define MD5_DIGEST_SIZE 16
+
+#define SHA_REG_DIGCNT 0x14
+
+#define SHA_REG_CTRL 0x18
+#define SHA_REG_CTRL_LENGTH (0xFFFFFFFF << 5)
+#define SHA_REG_CTRL_CLOSE_HASH (1 << 4)
+#define SHA_REG_CTRL_ALGO_CONST (1 << 3)
+#define SHA_REG_CTRL_ALGO (1 << 2)
+#define SHA_REG_CTRL_INPUT_READY (1 << 1)
+#define SHA_REG_CTRL_OUTPUT_READY (1 << 0)
+
+#define SHA_REG_REV 0x5C
+#define SHA_REG_REV_MAJOR 0xF0
+#define SHA_REG_REV_MINOR 0x0F
+
+#define SHA_REG_MASK 0x60
+#define SHA_REG_MASK_DMA_EN (1 << 3)
+#define SHA_REG_MASK_IT_EN (1 << 2)
+#define SHA_REG_MASK_SOFTRESET (1 << 1)
+#define SHA_REG_AUTOIDLE (1 << 0)
+
+#define SHA_REG_SYSSTATUS 0x64
+#define SHA_REG_SYSSTATUS_RESETDONE (1 << 0)
+
+#define DRIVER_NAME "OMAP SHA1/MD5"
+
+struct omap_sha1_md5_ctx {
+ unsigned int type_algo;
+ unsigned int bufcnt;
+ unsigned int digcnt;
+ int algo_const;
+ int bypass;
+ int digsize;
+ u8 hash[SHA1_DIGEST_SIZE];
+ u8 buffer[SHA1_BLOCK_SIZE];
+ struct hash_desc fallback;
+};
+
+struct omap_sha1_md5_dev {
+ unsigned long base_address;
+ int irq;
+ int digready;
+ struct clk *sha1_ick;
+ struct omap_sha1_md5_ctx
+ *hw_ctx;
+ struct device *dev;
+ wait_queue_head_t wq;
+};
+
+static struct omap_sha1_md5_dev *sha1_md5_data;
+
+#define SHA_REG_IOADDR(d, x) (void *)IO_ADDRESS((d)->base_address + (x))
+
+static u32 omap_sha1_md5_read(struct omap_sha1_md5_dev *data, u32 offset)
+{
+ return __raw_readl(SHA_REG_IOADDR(data, offset));
+}
+
+static void omap_sha1_md5_write(struct omap_sha1_md5_dev *data,
+ u32 value, u32 offset)
+{
+ __raw_writel(value, SHA_REG_IOADDR(data, offset));
+}
+
+static void omap_sha1_md5_write_mask(struct omap_sha1_md5_dev *data,
+ u32 value, u32 mask, u32 address)
+{
+ u32 val;
+
+ val = omap_sha1_md5_read(data, address);
+ val &= ~mask;
+ val |= value;
+ omap_sha1_md5_write(data, val, address);
+}
+
+static inline void omap_sha1_md5_enable_clk(struct crypto_tfm *tfm)
+{
+ struct omap_sha1_md5_dev *data = sha1_md5_data;
+
+ clk_enable(data->sha1_ick);
+}
+
+static inline void omap_sha1_md5_disable_clk(struct crypto_tfm *tfm)
+{
+ struct omap_sha1_md5_dev *data = sha1_md5_data;
+
+ clk_disable(data->sha1_ick);
+}
+
+static void omap_sha1_md5_copy_hash(struct crypto_tfm *tfm)
+{
+ struct omap_sha1_md5_ctx *ctx = crypto_tfm_ctx(tfm);
+ struct omap_sha1_md5_dev *data = sha1_md5_data;
+
+ u32 *hash = (u32 *)ctx->hash;
+
+ if (ctx->type_algo) {
+ /* SHA1 results are in big endian */
+ hash[0] = be32_to_cpu(
+ omap_sha1_md5_read(data, SHA_REG_DIGEST(0)));
+ hash[1] = be32_to_cpu(
+ omap_sha1_md5_read(data, SHA_REG_DIGEST(1)));
+ hash[2] = be32_to_cpu(
+ omap_sha1_md5_read(data, SHA_REG_DIGEST(2)));
+ hash[3] = be32_to_cpu(
+ omap_sha1_md5_read(data, SHA_REG_DIGEST(3)));
+ hash[4] = be32_to_cpu(
+ omap_sha1_md5_read(data, SHA_REG_DIGEST(4)));
+ } else {
+ /* MD5 results are in little endian */
+ hash[0] = le32_to_cpu(
+ omap_sha1_md5_read(data, SHA_REG_DIGEST(0)));
+ hash[1] = le32_to_cpu(
+ omap_sha1_md5_read(data, SHA_REG_DIGEST(1)));
+ hash[2] = le32_to_cpu(
+ omap_sha1_md5_read(data, SHA_REG_DIGEST(2)));
+ hash[3] = le32_to_cpu(
+ omap_sha1_md5_read(data, SHA_REG_DIGEST(3)));
+ }
+}
+
+static void omap_sha1_md5_bypass(struct crypto_tfm *tfm,
+ u8 *data, unsigned int length)
+{
+ struct omap_sha1_md5_ctx *ctx = crypto_tfm_ctx(tfm);
+
+ if (unlikely(!ctx->bypass))
+ return;
+
+ if (ctx->bypass == 1) {
+ crypto_hash_init(&ctx->fallback);
+ ctx->bypass++;
+ }
+
+ if (length) {
+ struct scatterlist sg;
+
+ sg_set_buf(&sg, data, length);
+ crypto_hash_update(&ctx->fallback, &sg, sg.length);
+ }
+}
+
+static void omap_sha1_md5_digest_buffer(struct crypto_tfm *tfm,
+ u8 *buf, unsigned int len, int close_hash)
+{
+ struct omap_sha1_md5_ctx *ctx = crypto_tfm_ctx(tfm);
+ struct omap_sha1_md5_dev *data = sha1_md5_data;
+ unsigned int algo_const = 0;
+ int c;
+ u32 *buffer = (u32 *)buf;
+
+ if (unlikely(ctx->bypass)) {
+ omap_sha1_md5_bypass(tfm, buf, len);
+ return;
+ }
+
+ if (unlikely(ctx->algo_const)) {
+ algo_const = SHA_REG_CTRL_ALGO_CONST;
+ ctx->algo_const = 0;
+ } else
+ omap_sha1_md5_write(data, ctx->digcnt, SHA_REG_DIGCNT);
+
+ if (unlikely(close_hash))
+ close_hash = SHA_REG_CTRL_CLOSE_HASH;
+
+ /* Setting ALGO_CONST only for the first iteration
+ * and CLOSE_HASH only for the last one. */
+ omap_sha1_md5_write_mask(data,
+ ctx->type_algo | algo_const | close_hash | (len << 5),
+ SHA_REG_CTRL_ALGO_CONST | SHA_REG_CTRL_CLOSE_HASH |
+ SHA_REG_CTRL_ALGO | SHA_REG_CTRL_LENGTH,
+ SHA_REG_CTRL);
+
+ ctx->digcnt += len;
+ while (!(omap_sha1_md5_read(data, SHA_REG_CTRL)
+ & SHA_REG_CTRL_INPUT_READY));
+
+ if (len % 4)
+ len = (len/4) + 1;
+ else
+ len /= 4;
+ for (c = 0; c < len; c++)
+ omap_sha1_md5_write(data, buffer[c], SHA_REG_DIN(c));
+}
+
+static void omap_sha1_md5_append_buffer(struct crypto_tfm *tfm,
+ const uint8_t *data, unsigned int length)
+{
+ struct omap_sha1_md5_ctx *ctx = crypto_tfm_ctx(tfm);
+
+ BUG_ON((ctx->bufcnt + length) > SHA1_MD5_BLOCK_SIZE);
+
+ memcpy(&ctx->buffer[ctx->bufcnt], data, length);
+ ctx->bufcnt += length;
+}
+
+static void omap_sha1_md5_dia_update(struct crypto_tfm *tfm,
+ const uint8_t *data, unsigned int length)
+{
+ struct omap_sha1_md5_ctx *ctx = crypto_tfm_ctx(tfm);
+
+ /* We need to save the last buffer <= 64 to digest it with
+ * CLOSE_HASH = 1 */
+ if (ctx->bufcnt && ((ctx->bufcnt + length) > SHA1_MD5_BLOCK_SIZE)) {
+ unsigned int c = SHA1_MD5_BLOCK_SIZE - ctx->bufcnt;
+
+ omap_sha1_md5_append_buffer(tfm, data, c);
+ data += c;
+ length -= c;
+ if (length) {
+ ctx->bufcnt = 0;
+ omap_sha1_md5_digest_buffer(tfm, ctx->buffer,
+ SHA1_MD5_BLOCK_SIZE, 0);
+ }
+ }
+
+ while (length > SHA1_MD5_BLOCK_SIZE) {
+ /* Revisit: use DMA here */
+ omap_sha1_md5_digest_buffer(tfm, (u8 *)data,
+ SHA1_MD5_BLOCK_SIZE, 0);
+ length -= SHA1_MD5_BLOCK_SIZE;
+ data += SHA1_MD5_BLOCK_SIZE;
+ }
+
+ if (length)
+ omap_sha1_md5_append_buffer(tfm, data, length);
+}
+
+static void omap_sha1_md5_start_reset(struct crypto_tfm *tfm)
+{
+ struct omap_sha1_md5_dev *data = sha1_md5_data;
+
+ omap_sha1_md5_write_mask(data, SHA_REG_MASK_SOFTRESET,
+ SHA_REG_MASK_SOFTRESET, SHA_REG_MASK);
+}
+
+static void omap_sha1_md5_wait_reset(struct crypto_tfm *tfm)
+{
+ struct omap_sha1_md5_dev *data = sha1_md5_data;
+
+ while (!(omap_sha1_md5_read(data, SHA_REG_SYSSTATUS)
+ & SHA_REG_SYSSTATUS_RESETDONE));
+}
+
+static void omap_sha1_md5_dia_init(struct crypto_tfm *tfm)
+{
+ struct omap_sha1_md5_dev *data = sha1_md5_data;
+ struct omap_sha1_md5_ctx *ctx = crypto_tfm_ctx(tfm);
+
+ if (unlikely(data->hw_ctx))
+ ctx->bypass = 1;
+ else {
+ data->hw_ctx = ctx;
+ ctx->bypass = 0;
+ omap_sha1_md5_enable_clk(tfm);
+ omap_sha1_md5_start_reset(tfm);
+ data->digready = 0;
+ }
+
+ if (ctx->bypass) {
+ omap_sha1_md5_bypass(tfm, NULL, 0);
+ return;
+ }
+
+ ctx->algo_const = 1;
+ ctx->bufcnt = 0;
+ ctx->digcnt = 0;
+
+ omap_sha1_md5_wait_reset(tfm);
+ omap_sha1_md5_write_mask(data, SHA_REG_MASK_IT_EN,
+ SHA_REG_MASK_DMA_EN | SHA_REG_MASK_IT_EN, SHA_REG_MASK);
+}
+
+static void omap_sha1_md5_dia_final(struct crypto_tfm *tfm, uint8_t *out)
+{
+ struct omap_sha1_md5_ctx *ctx = crypto_tfm_ctx(tfm);
+ struct omap_sha1_md5_dev *data = sha1_md5_data;
+ int digsize = ctx->digsize;
+
+ /* The buffer should be >= 9 */
+ if (((ctx->digcnt + ctx->bufcnt) < 9) && !ctx->bypass)
+ ctx->bypass = 1;
+
+ omap_sha1_md5_digest_buffer(tfm, ctx->buffer, ctx->bufcnt, 1);
+
+ if (unlikely(ctx->bypass)) {
+ crypto_hash_final(&ctx->fallback, out);
+ ctx->bypass = 0;
+ goto bypass;
+ } else
+ data->digready = 1;
+
+ wait_event_interruptible(data->wq, (data->digready == 2));
+ omap_sha1_md5_copy_hash(tfm);
+
+ memcpy(out, ctx->hash, digsize);
+
+bypass:
+ if (data->hw_ctx == ctx) {
+ omap_sha1_md5_disable_clk(tfm);
+ data->hw_ctx = NULL;
+ }
+}
+
+static irqreturn_t omap_sha1_md5_irq(int irq, void *dev_id)
+{
+ struct omap_sha1_md5_dev *data = dev_id;
+
+ omap_sha1_md5_write_mask(data, SHA_REG_CTRL_OUTPUT_READY,
+ SHA_REG_CTRL_OUTPUT_READY, SHA_REG_CTRL);
+
+ if (likely(!data->digready))
+ return IRQ_HANDLED;
+
+ if (data->hw_ctx == NULL) {
+ dev_err(data->dev, "unknown interrupt.\n");
+ return IRQ_HANDLED;
+ }
+
+ data->digready = 2;
+ wake_up_interruptible(&data->wq);
+
+ return IRQ_HANDLED;
+}
+
+static int omap_sha1_md5_cra_init(struct crypto_tfm *tfm)
+{
+ struct omap_sha1_md5_ctx *ctx = crypto_tfm_ctx(tfm);
+ struct omap_sha1_md5_dev *data = sha1_md5_data;
+ const char *fallback_driver_name = tfm->__crt_alg->cra_name;
+ struct crypto_hash *fallback_tfm;
+
+ /* Allocate a fallback and abort if it failed. */
+ fallback_tfm = crypto_alloc_hash(fallback_driver_name, 0,
+ CRYPTO_ALG_ASYNC |
+ CRYPTO_ALG_NEED_FALLBACK);
+ if (IS_ERR(fallback_tfm)) {
+ dev_err(data->dev, "fallback driver '%s' could not be"
+ "loaded.\n", fallback_driver_name);
+ return PTR_ERR(fallback_tfm);
+ }
+
+ ctx->fallback.tfm = fallback_tfm;
+
+ return 0;
+}
+
+static int omap_sha1_cra_init(struct crypto_tfm *tfm)
+{
+ struct omap_sha1_md5_ctx *ctx = crypto_tfm_ctx(tfm);
+
+ ctx->type_algo = SHA_REG_CTRL_ALGO;
+ ctx->digsize = SHA1_DIGEST_SIZE;
+
+ return omap_sha1_md5_cra_init(tfm);
+}
+
+static int omap_md5_cra_init(struct crypto_tfm *tfm)
+{
+ struct omap_sha1_md5_ctx *ctx = crypto_tfm_ctx(tfm);
+
+ ctx->type_algo = 0;
+ ctx->digsize = MD5_DIGEST_SIZE;
+
+ return omap_sha1_md5_cra_init(tfm);
+}
+
+static void omap_sha1_md5_cra_exit(struct crypto_tfm *tfm)
+{
+ struct omap_sha1_md5_ctx *ctx = crypto_tfm_ctx(tfm);
+
+ crypto_free_hash(ctx->fallback.tfm);
+ ctx->fallback.tfm = NULL;
+}
+
+static struct crypto_alg omap_sha1_alg = {
+ .cra_name = "sha1",
+ .cra_driver_name = "omap-sha1",
+ .cra_flags = CRYPTO_ALG_TYPE_DIGEST |
+ CRYPTO_ALG_NEED_FALLBACK,
+ .cra_blocksize = SHA1_MD5_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct omap_sha1_md5_ctx),
+ .cra_module = THIS_MODULE,
+ .cra_list = LIST_HEAD_INIT(omap_sha1_alg.cra_list),
+ .cra_init = omap_sha1_cra_init,
+ .cra_exit = omap_sha1_md5_cra_exit,
+ .cra_u = {
+ .digest = {
+ .dia_digestsize = SHA1_DIGEST_SIZE,
+ .dia_init = omap_sha1_md5_dia_init,
+ .dia_update = omap_sha1_md5_dia_update,
+ .dia_final = omap_sha1_md5_dia_final,
+ }
+ }
+};
+
+static struct crypto_alg omap_md5_alg = {
+ .cra_name = "md5",
+ .cra_driver_name = "omap-md5",
+ .cra_flags = CRYPTO_ALG_TYPE_DIGEST |
+ CRYPTO_ALG_NEED_FALLBACK,
+ .cra_blocksize = SHA1_MD5_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct omap_sha1_md5_ctx),
+ .cra_module = THIS_MODULE,
+ .cra_list = LIST_HEAD_INIT(omap_md5_alg.cra_list),
+ .cra_init = omap_md5_cra_init,
+ .cra_exit = omap_sha1_md5_cra_exit,
+ .cra_u = {
+ .digest = {
+ .dia_digestsize = MD5_DIGEST_SIZE,
+ .dia_init = omap_sha1_md5_dia_init,
+ .dia_update = omap_sha1_md5_dia_update,
+ .dia_final = omap_sha1_md5_dia_final,
+ }
+ }
+};
+
+static int omap_sha1_md5_probe(struct platform_device *pdev)
+{
+ struct omap_sha1_md5_dev *data;
+ struct device *dev = &pdev->dev;
+ struct resource *res;
+ int rc;
+
+ rc = crypto_register_alg(&omap_sha1_alg);
+ if (rc)
+ goto sha1_err;
+ rc = crypto_register_alg(&omap_md5_alg);
+ if (rc)
+ goto md5_err;
+
+ data = kzalloc(sizeof(struct omap_sha1_md5_dev), GFP_KERNEL);
+ if (data == NULL) {
+ dev_err(dev, "unable to alloc data struct.\n");
+ goto data_err;
+ }
+ platform_set_drvdata(pdev, data);
+ data->dev = dev;
+
+ /* Get the base address */
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_err(dev, "invalid resource type\n");
+ rc = -ENODEV;
+ goto res_err;
+ }
+ data->base_address = res->start;
+
+ /* Set the private data */
+ sha1_md5_data = data;
+
+ /* Get the IRQ */
+ res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+ if (!res) {
+ dev_err(dev, "invalid resource type\n");
+ rc = -ENODEV;
+ goto res_err;
+ }
+ data->irq = res->start;
+
+ rc = request_irq(res->start, omap_sha1_md5_irq,
+ IRQF_TRIGGER_LOW, DRIVER_NAME, data);
+ if (rc) {
+ dev_err(dev, "unable to request irq.\n");
+ goto res_err;
+ }
+
+ /* Initializing the clock */
+ data->sha1_ick = clk_get(0, "sha_ick");
+ if (!data->sha1_ick) {
+ dev_err(dev, "clock intialization failed.\n");
+ rc = -ENODEV;
+ goto clk_err;
+ }
+
+ init_waitqueue_head(&data->wq);
+
+ dev_info(dev, "hw accel on OMAP rev %u.%u\n",
+ (omap_sha1_md5_read(data, SHA_REG_REV) & SHA_REG_REV_MAJOR)>>4,
+ omap_sha1_md5_read(data, SHA_REG_REV) & SHA_REG_REV_MINOR);
+
+ return 0;
+
+clk_err:
+ free_irq(data->irq, data);
+res_err:
+ kfree(data);
+data_err:
+ crypto_unregister_alg(&omap_md5_alg);
+md5_err:
+ crypto_unregister_alg(&omap_sha1_alg);
+sha1_err:
+ dev_err(dev, "initialization failed.\n");
+ return rc;
+}
+
+static int omap_sha1_md5_remove(struct platform_device *pdev)
+{
+ struct omap_sha1_md5_dev *data = platform_get_drvdata(pdev);
+
+ free_irq(data->irq, data);
+ kfree(data);
+ crypto_unregister_alg(&omap_sha1_alg);
+ crypto_unregister_alg(&omap_md5_alg);
+
+ return 0;
+}
+
+static struct platform_driver omap_sha1_md5_driver = {
+ .probe = omap_sha1_md5_probe,
+ .remove = omap_sha1_md5_remove,
+ .driver = {
+ .name = DRIVER_NAME,
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init omap_sha1_md5_init(void)
+{
+ int ret;
+
+ ret = platform_driver_register(&omap_sha1_md5_driver);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static void __exit omap_sha1_md5_exit(void)
+{
+ platform_driver_unregister(&omap_sha1_md5_driver);
+}
+
+module_init(omap_sha1_md5_init);
+module_exit(omap_sha1_md5_exit);
+
+MODULE_DESCRIPTION("OMAP SHA1/MD5 hw acceleration support.");
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("David Cohen");
--
1.5.3.5
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