diff options
Diffstat (limited to 'drivers/crypto/omap-sham.c')
| -rw-r--r-- | drivers/crypto/omap-sham.c | 915 |
1 files changed, 721 insertions, 194 deletions
diff --git a/drivers/crypto/omap-sham.c b/drivers/crypto/omap-sham.c index 90d34adc2a6..3d1611f5aec 100644 --- a/drivers/crypto/omap-sham.c +++ b/drivers/crypto/omap-sham.c @@ -5,6 +5,7 @@ * * Copyright (c) 2010 Nokia Corporation * Author: Dmitry Kasatkin <dmitry.kasatkin@nokia.com> + * Copyright (c) 2011 Texas Instruments Incorporated * * 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 @@ -22,12 +23,18 @@ #include <linux/errno.h> #include <linux/interrupt.h> #include <linux/kernel.h> -#include <linux/clk.h> #include <linux/irq.h> #include <linux/io.h> #include <linux/platform_device.h> #include <linux/scatterlist.h> #include <linux/dma-mapping.h> +#include <linux/dmaengine.h> +#include <linux/omap-dma.h> +#include <linux/pm_runtime.h> +#include <linux/of.h> +#include <linux/of_device.h> +#include <linux/of_address.h> +#include <linux/of_irq.h> #include <linux/delay.h> #include <linux/crypto.h> #include <linux/cryptohash.h> @@ -37,16 +44,17 @@ #include <crypto/hash.h> #include <crypto/internal/hash.h> -#include <linux/omap-dma.h> -#include <mach/irqs.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 DST_MAXBURST 16 +#define DMA_MIN (DST_MAXBURST * sizeof(u32)) + +#define SHA_REG_IDIGEST(dd, x) ((dd)->pdata->idigest_ofs + ((x)*0x04)) +#define SHA_REG_DIN(dd, x) ((dd)->pdata->din_ofs + ((x) * 0x04)) +#define SHA_REG_DIGCNT(dd) ((dd)->pdata->digcnt_ofs) + +#define SHA_REG_ODIGEST(x) (0x00 + ((x) * 0x04)) #define SHA_REG_CTRL 0x18 #define SHA_REG_CTRL_LENGTH (0xFFFFFFFF << 5) @@ -56,19 +64,42 @@ #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_REV(dd) ((dd)->pdata->rev_ofs) -#define SHA_REG_MASK 0x60 +#define SHA_REG_MASK(dd) ((dd)->pdata->mask_ofs) #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(dd) ((dd)->pdata->sysstatus_ofs) #define SHA_REG_SYSSTATUS_RESETDONE (1 << 0) +#define SHA_REG_MODE 0x44 +#define SHA_REG_MODE_HMAC_OUTER_HASH (1 << 7) +#define SHA_REG_MODE_HMAC_KEY_PROC (1 << 5) +#define SHA_REG_MODE_CLOSE_HASH (1 << 4) +#define SHA_REG_MODE_ALGO_CONSTANT (1 << 3) +#define SHA_REG_MODE_ALGO_MASK (3 << 1) +#define SHA_REG_MODE_ALGO_MD5_128 (0 << 1) +#define SHA_REG_MODE_ALGO_SHA1_160 (1 << 1) +#define SHA_REG_MODE_ALGO_SHA2_224 (2 << 1) +#define SHA_REG_MODE_ALGO_SHA2_256 (3 << 1) + +#define SHA_REG_LENGTH 0x48 + +#define SHA_REG_IRQSTATUS 0x118 +#define SHA_REG_IRQSTATUS_CTX_RDY (1 << 3) +#define SHA_REG_IRQSTATUS_PARTHASH_RDY (1 << 2) +#define SHA_REG_IRQSTATUS_INPUT_RDY (1 << 1) +#define SHA_REG_IRQSTATUS_OUTPUT_RDY (1 << 0) + +#define SHA_REG_IRQENA 0x11C +#define SHA_REG_IRQENA_CTX_RDY (1 << 3) +#define SHA_REG_IRQENA_PARTHASH_RDY (1 << 2) +#define SHA_REG_IRQENA_INPUT_RDY (1 << 1) +#define SHA_REG_IRQENA_OUTPUT_RDY (1 << 0) + #define DEFAULT_TIMEOUT_INTERVAL HZ /* mostly device flags */ @@ -79,20 +110,33 @@ #define FLAGS_INIT 4 #define FLAGS_CPU 5 #define FLAGS_DMA_READY 6 +#define FLAGS_AUTO_XOR 7 +#define FLAGS_BE32_SHA1 8 /* context flags */ #define FLAGS_FINUP 16 #define FLAGS_SG 17 -#define FLAGS_SHA1 18 -#define FLAGS_HMAC 19 -#define FLAGS_ERROR 20 -#define OP_UPDATE 1 -#define OP_FINAL 2 +#define FLAGS_MODE_SHIFT 18 +#define FLAGS_MODE_MASK (SHA_REG_MODE_ALGO_MASK \ + << (FLAGS_MODE_SHIFT - 1)) +#define FLAGS_MODE_MD5 (SHA_REG_MODE_ALGO_MD5_128 \ + << (FLAGS_MODE_SHIFT - 1)) +#define FLAGS_MODE_SHA1 (SHA_REG_MODE_ALGO_SHA1_160 \ + << (FLAGS_MODE_SHIFT - 1)) +#define FLAGS_MODE_SHA224 (SHA_REG_MODE_ALGO_SHA2_224 \ + << (FLAGS_MODE_SHIFT - 1)) +#define FLAGS_MODE_SHA256 (SHA_REG_MODE_ALGO_SHA2_256 \ + << (FLAGS_MODE_SHIFT - 1)) +#define FLAGS_HMAC 20 +#define FLAGS_ERROR 21 + +#define OP_UPDATE 1 +#define OP_FINAL 2 #define OMAP_ALIGN_MASK (sizeof(u32)-1) #define OMAP_ALIGNED __attribute__((aligned(sizeof(u32)))) -#define BUFLEN PAGE_SIZE +#define BUFLEN PAGE_SIZE struct omap_sham_dev; @@ -101,7 +145,7 @@ struct omap_sham_reqctx { unsigned long flags; unsigned long op; - u8 digest[SHA1_DIGEST_SIZE] OMAP_ALIGNED; + u8 digest[SHA256_DIGEST_SIZE] OMAP_ALIGNED; size_t digcnt; size_t bufcnt; size_t buflen; @@ -109,6 +153,7 @@ struct omap_sham_reqctx { /* walk state */ struct scatterlist *sg; + struct scatterlist sgl; unsigned int offset; /* offset in current sg */ unsigned int total; /* total request */ @@ -117,8 +162,8 @@ struct omap_sham_reqctx { struct omap_sham_hmac_ctx { struct crypto_shash *shash; - u8 ipad[SHA1_MD5_BLOCK_SIZE]; - u8 opad[SHA1_MD5_BLOCK_SIZE]; + u8 ipad[SHA1_MD5_BLOCK_SIZE] OMAP_ALIGNED; + u8 opad[SHA1_MD5_BLOCK_SIZE] OMAP_ALIGNED; }; struct omap_sham_ctx { @@ -134,22 +179,56 @@ struct omap_sham_ctx { #define OMAP_SHAM_QUEUE_LENGTH 1 +struct omap_sham_algs_info { + struct ahash_alg *algs_list; + unsigned int size; + unsigned int registered; +}; + +struct omap_sham_pdata { + struct omap_sham_algs_info *algs_info; + unsigned int algs_info_size; + unsigned long flags; + int digest_size; + + void (*copy_hash)(struct ahash_request *req, int out); + void (*write_ctrl)(struct omap_sham_dev *dd, size_t length, + int final, int dma); + void (*trigger)(struct omap_sham_dev *dd, size_t length); + int (*poll_irq)(struct omap_sham_dev *dd); + irqreturn_t (*intr_hdlr)(int irq, void *dev_id); + + u32 odigest_ofs; + u32 idigest_ofs; + u32 din_ofs; + u32 digcnt_ofs; + u32 rev_ofs; + u32 mask_ofs; + u32 sysstatus_ofs; + + u32 major_mask; + u32 major_shift; + u32 minor_mask; + u32 minor_shift; +}; + struct omap_sham_dev { struct list_head list; unsigned long phys_base; struct device *dev; void __iomem *io_base; int irq; - struct clk *iclk; spinlock_t lock; int err; - int dma; - int dma_lch; + unsigned int dma; + struct dma_chan *dma_lch; struct tasklet_struct done_task; unsigned long flags; struct crypto_queue queue; struct ahash_request *req; + + const struct omap_sham_pdata *pdata; }; struct omap_sham_drv { @@ -197,21 +276,44 @@ static inline int omap_sham_wait(struct omap_sham_dev *dd, u32 offset, u32 bit) return 0; } -static void omap_sham_copy_hash(struct ahash_request *req, int out) +static void omap_sham_copy_hash_omap2(struct ahash_request *req, int out) { struct omap_sham_reqctx *ctx = ahash_request_ctx(req); + struct omap_sham_dev *dd = ctx->dd; u32 *hash = (u32 *)ctx->digest; int i; - /* MD5 is almost unused. So copy sha1 size to reduce code */ - for (i = 0; i < SHA1_DIGEST_SIZE / sizeof(u32); i++) { + for (i = 0; i < dd->pdata->digest_size / sizeof(u32); i++) { if (out) - hash[i] = omap_sham_read(ctx->dd, - SHA_REG_DIGEST(i)); + hash[i] = omap_sham_read(dd, SHA_REG_IDIGEST(dd, i)); else - omap_sham_write(ctx->dd, - SHA_REG_DIGEST(i), hash[i]); + omap_sham_write(dd, SHA_REG_IDIGEST(dd, i), hash[i]); + } +} + +static void omap_sham_copy_hash_omap4(struct ahash_request *req, int out) +{ + struct omap_sham_reqctx *ctx = ahash_request_ctx(req); + struct omap_sham_dev *dd = ctx->dd; + int i; + + if (ctx->flags & BIT(FLAGS_HMAC)) { + struct crypto_ahash *tfm = crypto_ahash_reqtfm(dd->req); + struct omap_sham_ctx *tctx = crypto_ahash_ctx(tfm); + struct omap_sham_hmac_ctx *bctx = tctx->base; + u32 *opad = (u32 *)bctx->opad; + + for (i = 0; i < dd->pdata->digest_size / sizeof(u32); i++) { + if (out) + opad[i] = omap_sham_read(dd, + SHA_REG_ODIGEST(i)); + else + omap_sham_write(dd, SHA_REG_ODIGEST(i), + opad[i]); + } } + + omap_sham_copy_hash_omap2(req, out); } static void omap_sham_copy_ready_hash(struct ahash_request *req) @@ -219,34 +321,44 @@ static void omap_sham_copy_ready_hash(struct ahash_request *req) struct omap_sham_reqctx *ctx = ahash_request_ctx(req); u32 *in = (u32 *)ctx->digest; u32 *hash = (u32 *)req->result; - int i; + int i, d, big_endian = 0; if (!hash) return; - if (likely(ctx->flags & BIT(FLAGS_SHA1))) { - /* SHA1 results are in big endian */ - for (i = 0; i < SHA1_DIGEST_SIZE / sizeof(u32); i++) + switch (ctx->flags & FLAGS_MODE_MASK) { + case FLAGS_MODE_MD5: + d = MD5_DIGEST_SIZE / sizeof(u32); + break; + case FLAGS_MODE_SHA1: + /* OMAP2 SHA1 is big endian */ + if (test_bit(FLAGS_BE32_SHA1, &ctx->dd->flags)) + big_endian = 1; + d = SHA1_DIGEST_SIZE / sizeof(u32); + break; + case FLAGS_MODE_SHA224: + d = SHA224_DIGEST_SIZE / sizeof(u32); + break; + case FLAGS_MODE_SHA256: + d = SHA256_DIGEST_SIZE / sizeof(u32); + break; + default: + d = 0; + } + + if (big_endian) + for (i = 0; i < d; i++) hash[i] = be32_to_cpu(in[i]); - } else { - /* MD5 results are in little endian */ - for (i = 0; i < MD5_DIGEST_SIZE / sizeof(u32); i++) + else + for (i = 0; i < d; i++) hash[i] = le32_to_cpu(in[i]); - } } static int omap_sham_hw_init(struct omap_sham_dev *dd) { - clk_enable(dd->iclk); + pm_runtime_get_sync(dd->dev); if (!test_bit(FLAGS_INIT, &dd->flags)) { - omap_sham_write_mask(dd, SHA_REG_MASK, - SHA_REG_MASK_SOFTRESET, SHA_REG_MASK_SOFTRESET); - - if (omap_sham_wait(dd, SHA_REG_SYSSTATUS, - SHA_REG_SYSSTATUS_RESETDONE)) - return -ETIMEDOUT; - set_bit(FLAGS_INIT, &dd->flags); dd->err = 0; } @@ -254,23 +366,23 @@ static int omap_sham_hw_init(struct omap_sham_dev *dd) return 0; } -static void omap_sham_write_ctrl(struct omap_sham_dev *dd, size_t length, +static void omap_sham_write_ctrl_omap2(struct omap_sham_dev *dd, size_t length, int final, int dma) { struct omap_sham_reqctx *ctx = ahash_request_ctx(dd->req); u32 val = length << 5, mask; if (likely(ctx->digcnt)) - omap_sham_write(dd, SHA_REG_DIGCNT, ctx->digcnt); + omap_sham_write(dd, SHA_REG_DIGCNT(dd), ctx->digcnt); - omap_sham_write_mask(dd, SHA_REG_MASK, + omap_sham_write_mask(dd, SHA_REG_MASK(dd), SHA_REG_MASK_IT_EN | (dma ? SHA_REG_MASK_DMA_EN : 0), SHA_REG_MASK_IT_EN | SHA_REG_MASK_DMA_EN); /* * Setting ALGO_CONST only for the first iteration * and CLOSE_HASH only for the last one. */ - if (ctx->flags & BIT(FLAGS_SHA1)) + if ((ctx->flags & FLAGS_MODE_MASK) == FLAGS_MODE_SHA1) val |= SHA_REG_CTRL_ALGO; if (!ctx->digcnt) val |= SHA_REG_CTRL_ALGO_CONST; @@ -283,6 +395,81 @@ static void omap_sham_write_ctrl(struct omap_sham_dev *dd, size_t length, omap_sham_write_mask(dd, SHA_REG_CTRL, val, mask); } +static void omap_sham_trigger_omap2(struct omap_sham_dev *dd, size_t length) +{ +} + +static int omap_sham_poll_irq_omap2(struct omap_sham_dev *dd) +{ + return omap_sham_wait(dd, SHA_REG_CTRL, SHA_REG_CTRL_INPUT_READY); +} + +static void omap_sham_write_n(struct omap_sham_dev *dd, u32 offset, + u32 *value, int count) +{ + for (; count--; value++, offset += 4) + omap_sham_write(dd, offset, *value); +} + +static void omap_sham_write_ctrl_omap4(struct omap_sham_dev *dd, size_t length, + int final, int dma) +{ + struct omap_sham_reqctx *ctx = ahash_request_ctx(dd->req); + u32 val, mask; + + /* + * Setting ALGO_CONST only for the first iteration and + * CLOSE_HASH only for the last one. Note that flags mode bits + * correspond to algorithm encoding in mode register. + */ + val = (ctx->flags & FLAGS_MODE_MASK) >> (FLAGS_MODE_SHIFT - 1); + if (!ctx->digcnt) { + struct crypto_ahash *tfm = crypto_ahash_reqtfm(dd->req); + struct omap_sham_ctx *tctx = crypto_ahash_ctx(tfm); + struct omap_sham_hmac_ctx *bctx = tctx->base; + + val |= SHA_REG_MODE_ALGO_CONSTANT; + + if (ctx->flags & BIT(FLAGS_HMAC)) { + val |= SHA_REG_MODE_HMAC_KEY_PROC; + omap_sham_write_n(dd, SHA_REG_ODIGEST(0), + (u32 *)bctx->ipad, + SHA1_BLOCK_SIZE / sizeof(u32)); + ctx->digcnt += SHA1_BLOCK_SIZE; + } + } + + if (final) { + val |= SHA_REG_MODE_CLOSE_HASH; + + if (ctx->flags & BIT(FLAGS_HMAC)) + val |= SHA_REG_MODE_HMAC_OUTER_HASH; + } + + mask = SHA_REG_MODE_ALGO_CONSTANT | SHA_REG_MODE_CLOSE_HASH | + SHA_REG_MODE_ALGO_MASK | SHA_REG_MODE_HMAC_OUTER_HASH | + SHA_REG_MODE_HMAC_KEY_PROC; + + dev_dbg(dd->dev, "ctrl: %08x, flags: %08lx\n", val, ctx->flags); + omap_sham_write_mask(dd, SHA_REG_MODE, val, mask); + omap_sham_write(dd, SHA_REG_IRQENA, SHA_REG_IRQENA_OUTPUT_RDY); + omap_sham_write_mask(dd, SHA_REG_MASK(dd), + SHA_REG_MASK_IT_EN | + (dma ? SHA_REG_MASK_DMA_EN : 0), + SHA_REG_MASK_IT_EN | SHA_REG_MASK_DMA_EN); +} + +static void omap_sham_trigger_omap4(struct omap_sham_dev *dd, size_t length) +{ + omap_sham_write(dd, SHA_REG_LENGTH, length); +} + +static int omap_sham_poll_irq_omap4(struct omap_sham_dev *dd) +{ + return omap_sham_wait(dd, SHA_REG_IRQSTATUS, + SHA_REG_IRQSTATUS_INPUT_RDY); +} + static int omap_sham_xmit_cpu(struct omap_sham_dev *dd, const u8 *buf, size_t length, int final) { @@ -293,12 +480,13 @@ static int omap_sham_xmit_cpu(struct omap_sham_dev *dd, const u8 *buf, dev_dbg(dd->dev, "xmit_cpu: digcnt: %d, length: %d, final: %d\n", ctx->digcnt, length, final); - omap_sham_write_ctrl(dd, length, final, 0); + dd->pdata->write_ctrl(dd, length, final, 0); + dd->pdata->trigger(dd, length); /* should be non-zero before next lines to disable clocks later */ ctx->digcnt += length; - if (omap_sham_wait(dd, SHA_REG_CTRL, SHA_REG_CTRL_INPUT_READY)) + if (dd->pdata->poll_irq(dd)) return -ETIMEDOUT; if (final) @@ -309,30 +497,73 @@ static int omap_sham_xmit_cpu(struct omap_sham_dev *dd, const u8 *buf, len32 = DIV_ROUND_UP(length, sizeof(u32)); for (count = 0; count < len32; count++) - omap_sham_write(dd, SHA_REG_DIN(count), buffer[count]); + omap_sham_write(dd, SHA_REG_DIN(dd, count), buffer[count]); return -EINPROGRESS; } +static void omap_sham_dma_callback(void *param) +{ + struct omap_sham_dev *dd = param; + + set_bit(FLAGS_DMA_READY, &dd->flags); + tasklet_schedule(&dd->done_task); +} + static int omap_sham_xmit_dma(struct omap_sham_dev *dd, dma_addr_t dma_addr, - size_t length, int final) + size_t length, int final, int is_sg) { struct omap_sham_reqctx *ctx = ahash_request_ctx(dd->req); - int len32; + struct dma_async_tx_descriptor *tx; + struct dma_slave_config cfg; + int len32, ret; dev_dbg(dd->dev, "xmit_dma: digcnt: %d, length: %d, final: %d\n", ctx->digcnt, length, final); - len32 = DIV_ROUND_UP(length, sizeof(u32)); + memset(&cfg, 0, sizeof(cfg)); + + cfg.dst_addr = dd->phys_base + SHA_REG_DIN(dd, 0); + cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; + cfg.dst_maxburst = DST_MAXBURST; + + ret = dmaengine_slave_config(dd->dma_lch, &cfg); + if (ret) { + pr_err("omap-sham: can't configure dmaengine slave: %d\n", ret); + return ret; + } - omap_set_dma_transfer_params(dd->dma_lch, OMAP_DMA_DATA_TYPE_S32, len32, - 1, OMAP_DMA_SYNC_PACKET, dd->dma, - OMAP_DMA_DST_SYNC_PREFETCH); + len32 = DIV_ROUND_UP(length, DMA_MIN) * DMA_MIN; + + if (is_sg) { + /* + * The SG entry passed in may not have the 'length' member + * set correctly so use a local SG entry (sgl) with the + * proper value for 'length' instead. If this is not done, + * the dmaengine may try to DMA the incorrect amount of data. + */ + sg_init_table(&ctx->sgl, 1); + ctx->sgl.page_link = ctx->sg->page_link; + ctx->sgl.offset = ctx->sg->offset; + sg_dma_len(&ctx->sgl) = len32; + sg_dma_address(&ctx->sgl) = sg_dma_address(ctx->sg); + + tx = dmaengine_prep_slave_sg(dd->dma_lch, &ctx->sgl, 1, + DMA_MEM_TO_DEV, DMA_PREP_INTERRUPT | DMA_CTRL_ACK); + } else { + tx = dmaengine_prep_slave_single(dd->dma_lch, dma_addr, len32, + DMA_MEM_TO_DEV, DMA_PREP_INTERRUPT | DMA_CTRL_ACK); + } + + if (!tx) { + dev_err(dd->dev, "prep_slave_sg/single() failed\n"); + return -EINVAL; + } - omap_set_dma_src_params(dd->dma_lch, 0, OMAP_DMA_AMODE_POST_INC, - dma_addr, 0, 0); + tx->callback = omap_sham_dma_callback; + tx->callback_param = dd; - omap_sham_write_ctrl(dd, length, final, 1); + dd->pdata->write_ctrl(dd, length, final, 1); ctx->digcnt += length; @@ -341,7 +572,10 @@ static int omap_sham_xmit_dma(struct omap_sham_dev *dd, dma_addr_t dma_addr, set_bit(FLAGS_DMA_ACTIVE, &dd->flags); - omap_start_dma(dd->dma_lch); + dmaengine_submit(tx); + dma_async_issue_pending(dd->dma_lch); + + dd->pdata->trigger(dd, length); return -EINPROGRESS; } @@ -388,6 +622,8 @@ static int omap_sham_xmit_dma_map(struct omap_sham_dev *dd, struct omap_sham_reqctx *ctx, size_t length, int final) { + int ret; + ctx->dma_addr = dma_map_single(dd->dev, ctx->buffer, ctx->buflen, DMA_TO_DEVICE); if (dma_mapping_error(dd->dev, ctx->dma_addr)) { @@ -397,8 +633,12 @@ static int omap_sham_xmit_dma_map(struct omap_sham_dev *dd, ctx->flags &= ~BIT(FLAGS_SG); - /* next call does not fail... so no unmap in the case of error */ - return omap_sham_xmit_dma(dd, ctx->dma_addr, length, final); + ret = omap_sham_xmit_dma(dd, ctx->dma_addr, length, final, 0); + if (ret != -EINPROGRESS) + dma_unmap_single(dd->dev, ctx->dma_addr, ctx->buflen, + DMA_TO_DEVICE); + + return ret; } static int omap_sham_update_dma_slow(struct omap_sham_dev *dd) @@ -433,6 +673,7 @@ static int omap_sham_update_dma_start(struct omap_sham_dev *dd) struct omap_sham_reqctx *ctx = ahash_request_ctx(dd->req); unsigned int length, final, tail; struct scatterlist *sg; + int ret; if (!ctx->total) return 0; @@ -440,6 +681,15 @@ static int omap_sham_update_dma_start(struct omap_sham_dev *dd) if (ctx->bufcnt || ctx->offset) return omap_sham_update_dma_slow(dd); + /* + * Don't use the sg interface when the transfer size is less + * than the number of elements in a DMA frame. Otherwise, + * the dmaengine infrastructure will calculate that it needs + * to transfer 0 frames which ultimately fails. + */ + if (ctx->total < (DST_MAXBURST * sizeof(u32))) + return omap_sham_update_dma_slow(dd); + dev_dbg(dd->dev, "fast: digcnt: %d, bufcnt: %u, total: %u\n", ctx->digcnt, ctx->bufcnt, ctx->total); @@ -477,8 +727,11 @@ static int omap_sham_update_dma_start(struct omap_sham_dev *dd) final = (ctx->flags & BIT(FLAGS_FINUP)) && !ctx->total; - /* next call does not fail... so no unmap in the case of error */ - return omap_sham_xmit_dma(dd, sg_dma_address(ctx->sg), length, final); + ret = omap_sham_xmit_dma(dd, sg_dma_address(ctx->sg), length, final, 1); + if (ret != -EINPROGRESS) + dma_unmap_sg(dd->dev, ctx->sg, 1, DMA_TO_DEVICE); + + return ret; } static int omap_sham_update_cpu(struct omap_sham_dev *dd) @@ -497,7 +750,8 @@ static int omap_sham_update_dma_stop(struct omap_sham_dev *dd) { struct omap_sham_reqctx *ctx = ahash_request_ctx(dd->req); - omap_stop_dma(dd->dma_lch); + dmaengine_terminate_all(dd->dma_lch); + if (ctx->flags & BIT(FLAGS_SG)) { dma_unmap_sg(dd->dev, ctx->sg, 1, DMA_TO_DEVICE); if (ctx->sg->length == ctx->offset) { @@ -539,18 +793,33 @@ static int omap_sham_init(struct ahash_request *req) dev_dbg(dd->dev, "init: digest size: %d\n", crypto_ahash_digestsize(tfm)); - if (crypto_ahash_digestsize(tfm) == SHA1_DIGEST_SIZE) - ctx->flags |= BIT(FLAGS_SHA1); + switch (crypto_ahash_digestsize(tfm)) { + case MD5_DIGEST_SIZE: + ctx->flags |= FLAGS_MODE_MD5; + break; + case SHA1_DIGEST_SIZE: + ctx->flags |= FLAGS_MODE_SHA1; + break; + case SHA224_DIGEST_SIZE: + ctx->flags |= FLAGS_MODE_SHA224; + break; + case SHA256_DIGEST_SIZE: + ctx->flags |= FLAGS_MODE_SHA256; + break; + } ctx->bufcnt = 0; ctx->digcnt = 0; ctx->buflen = BUFLEN; if (tctx->flags & BIT(FLAGS_HMAC)) { - struct omap_sham_hmac_ctx *bctx = tctx->base; + if (!test_bit(FLAGS_AUTO_XOR, &dd->flags)) { + struct omap_sham_hmac_ctx *bctx = tctx->base; + + memcpy(ctx->buffer, bctx->ipad, SHA1_MD5_BLOCK_SIZE); + ctx->bufcnt = SHA1_MD5_BLOCK_SIZE; + } - memcpy(ctx->buffer, bctx->ipad, SHA1_MD5_BLOCK_SIZE); - ctx->bufcnt = SHA1_MD5_BLOCK_SIZE; ctx->flags |= BIT(FLAGS_HMAC); } @@ -584,7 +853,7 @@ static int omap_sham_final_req(struct omap_sham_dev *dd) struct omap_sham_reqctx *ctx = ahash_request_ctx(req); int err = 0, use_dma = 1; - if (ctx->bufcnt <= 64) + if (ctx->bufcnt <= DMA_MIN) /* faster to handle last block with cpu */ use_dma = 0; @@ -627,7 +896,8 @@ static int omap_sham_finish(struct ahash_request *req) if (ctx->digcnt) { omap_sham_copy_ready_hash(req); - if (ctx->flags & BIT(FLAGS_HMAC)) + if ((ctx->flags & BIT(FLAGS_HMAC)) && + !test_bit(FLAGS_AUTO_XOR, &dd->flags)) err = omap_sham_finish_hmac(req); } @@ -642,7 +912,7 @@ static void omap_sham_finish_req(struct ahash_request *req, int err) struct omap_sham_dev *dd = ctx->dd; if (!err) { - omap_sham_copy_hash(req, 1); + dd->pdata->copy_hash(req, 1); if (test_bit(FLAGS_FINAL, &dd->flags)) err = omap_sham_finish(req); } else { @@ -652,7 +922,8 @@ static void omap_sham_finish_req(struct ahash_request *req, int err) /* atomic operation is not needed here */ dd->flags &= ~(BIT(FLAGS_BUSY) | BIT(FLAGS_FINAL) | BIT(FLAGS_CPU) | BIT(FLAGS_DMA_READY) | BIT(FLAGS_OUTPUT_READY)); - clk_disable(dd->iclk); + + pm_runtime_put_sync(dd->dev); if (req->base.complete) req->base.complete(&req->base, err); @@ -699,19 +970,9 @@ static int omap_sham_handle_queue(struct omap_sham_dev *dd, if (err) goto err1; - omap_set_dma_dest_params(dd->dma_lch, 0, - OMAP_DMA_AMODE_CONSTANT, - dd->phys_base + SHA_REG_DIN(0), 0, 16); - - omap_set_dma_dest_burst_mode(dd->dma_lch, - OMAP_DMA_DATA_BURST_16); - - omap_set_dma_src_burst_mode(dd->dma_lch, - OMAP_DMA_DATA_BURST_4); - if (ctx->digcnt) /* request has changed - restore hash */ - omap_sham_copy_hash(req, 0); + dd->pdata->copy_hash(req, 0); if (ctx->op == OP_UPDATE) { err = omap_sham_update_req(dd); @@ -850,7 +1111,21 @@ static int omap_sham_setkey(struct crypto_ahash *tfm, const u8 *key, struct omap_sham_hmac_ctx *bctx = tctx->base; int bs = crypto_shash_blocksize(bctx->shash); int ds = crypto_shash_digestsize(bctx->shash); + struct omap_sham_dev *dd = NULL, *tmp; int err, i; + + spin_lock_bh(&sham.lock); + if (!tctx->dd) { + list_for_each_entry(tmp, &sham.dev_list, list) { + dd = tmp; + break; + } + tctx->dd = dd; + } else { + dd = tctx->dd; + } + spin_unlock_bh(&sham.lock); + err = crypto_shash_setkey(tctx->fallback, key, keylen); if (err) return err; @@ -867,11 +1142,14 @@ static int omap_sham_setkey(struct crypto_ahash *tfm, const u8 *key, } memset(bctx->ipad + keylen, 0, bs - keylen); - memcpy(bctx->opad, bctx->ipad, bs); - for (i = 0; i < bs; i++) { - bctx->ipad[i] ^= 0x36; - bctx->opad[i] ^= 0x5c; + if (!test_bit(FLAGS_AUTO_XOR, &dd->flags)) { + memcpy(bctx->opad, bctx->ipad, bs); + + for (i = 0; i < bs; i++) { + bctx->ipad[i] ^= 0x36; + bctx->opad[i] ^= 0x5c; + } } return err; @@ -921,6 +1199,16 @@ static int omap_sham_cra_sha1_init(struct crypto_tfm *tfm) return omap_sham_cra_init_alg(tfm, "sha1"); } +static int omap_sham_cra_sha224_init(struct crypto_tfm *tfm) +{ + return omap_sham_cra_init_alg(tfm, "sha224"); +} + +static int omap_sham_cra_sha256_init(struct crypto_tfm *tfm) +{ + return omap_sham_cra_init_alg(tfm, "sha256"); +} + static int omap_sham_cra_md5_init(struct crypto_tfm *tfm) { return omap_sham_cra_init_alg(tfm, "md5"); @@ -939,7 +1227,7 @@ static void omap_sham_cra_exit(struct crypto_tfm *tfm) } } -static struct ahash_alg algs[] = { +static struct ahash_alg algs_sha1_md5[] = { { .init = omap_sham_init, .update = omap_sham_update, @@ -1038,6 +1326,102 @@ static struct ahash_alg algs[] = { } }; +/* OMAP4 has some algs in addition to what OMAP2 has */ +static struct ahash_alg algs_sha224_sha256[] = { +{ + .init = omap_sham_init, + .update = omap_sham_update, + .final = omap_sham_final, + .finup = omap_sham_finup, + .digest = omap_sham_digest, + .halg.digestsize = SHA224_DIGEST_SIZE, + .halg.base = { + .cra_name = "sha224", + .cra_driver_name = "omap-sha224", + .cra_priority = 100, + .cra_flags = CRYPTO_ALG_TYPE_AHASH | + CRYPTO_ALG_ASYNC | + CRYPTO_ALG_NEED_FALLBACK, + .cra_blocksize = SHA224_BLOCK_SIZE, + .cra_ctxsize = sizeof(struct omap_sham_ctx), + .cra_alignmask = 0, + .cra_module = THIS_MODULE, + .cra_init = omap_sham_cra_init, + .cra_exit = omap_sham_cra_exit, + } +}, +{ + .init = omap_sham_init, + .update = omap_sham_update, + .final = omap_sham_final, + .finup = omap_sham_finup, + .digest = omap_sham_digest, + .halg.digestsize = SHA256_DIGEST_SIZE, + .halg.base = { + .cra_name = "sha256", + .cra_driver_name = "omap-sha256", + .cra_priority = 100, + .cra_flags = CRYPTO_ALG_TYPE_AHASH | + CRYPTO_ALG_ASYNC | + CRYPTO_ALG_NEED_FALLBACK, + .cra_blocksize = SHA256_BLOCK_SIZE, + .cra_ctxsize = sizeof(struct omap_sham_ctx), + .cra_alignmask = 0, + .cra_module = THIS_MODULE, + .cra_init = omap_sham_cra_init, + .cra_exit = omap_sham_cra_exit, + } +}, +{ + .init = omap_sham_init, + .update = omap_sham_update, + .final = omap_sham_final, + .finup = omap_sham_finup, + .digest = omap_sham_digest, + .setkey = omap_sham_setkey, + .halg.digestsize = SHA224_DIGEST_SIZE, + .halg.base = { + .cra_name = "hmac(sha224)", + .cra_driver_name = "omap-hmac-sha224", + .cra_priority = 100, + .cra_flags = CRYPTO_ALG_TYPE_AHASH | + CRYPTO_ALG_ASYNC | + CRYPTO_ALG_NEED_FALLBACK, + .cra_blocksize = SHA224_BLOCK_SIZE, + .cra_ctxsize = sizeof(struct omap_sham_ctx) + + sizeof(struct omap_sham_hmac_ctx), + .cra_alignmask = OMAP_ALIGN_MASK, + .cra_module = THIS_MODULE, + .cra_init = omap_sham_cra_sha224_init, + .cra_exit = omap_sham_cra_exit, + } +}, +{ + .init = omap_sham_init, + .update = omap_sham_update, + .final = omap_sham_final, + .finup = omap_sham_finup, + .digest = omap_sham_digest, + .setkey = omap_sham_setkey, + .halg.digestsize = SHA256_DIGEST_SIZE, + .halg.base = { + .cra_name = "hmac(sha256)", + .cra_driver_name = "omap-hmac-sha256", + .cra_priority = 100, + .cra_flags = CRYPTO_ALG_TYPE_AHASH | + CRYPTO_ALG_ASYNC | + CRYPTO_ALG_NEED_FALLBACK, + .cra_blocksize = SHA256_BLOCK_SIZE, + .cra_ctxsize = sizeof(struct omap_sham_ctx) + + sizeof(struct omap_sham_hmac_ctx), + .cra_alignmask = OMAP_ALIGN_MASK, + .cra_module = THIS_MODULE, + .cra_init = omap_sham_cra_sha256_init, + .cra_exit = omap_sham_cra_exit, + } +}, +}; + static void omap_sham_done_task(unsigned long data) { struct omap_sham_dev *dd = (struct omap_sham_dev *)data; @@ -1076,7 +1460,19 @@ finish: omap_sham_finish_req(dd->req, err); } -static irqreturn_t omap_sham_irq(int irq, void *dev_id) +static irqreturn_t omap_sham_irq_common(struct omap_sham_dev *dd) +{ + if (!test_bit(FLAGS_BUSY, &dd->flags)) { + dev_warn(dd->dev, "Interrupt when no active requests.\n"); + } else { + set_bit(FLAGS_OUTPUT_READY, &dd->flags); + tasklet_schedule(&dd->done_task); + } + + return IRQ_HANDLED; +} + +static irqreturn_t omap_sham_irq_omap2(int irq, void *dev_id) { struct omap_sham_dev *dd = dev_id; @@ -1088,61 +1484,188 @@ static irqreturn_t omap_sham_irq(int irq, void *dev_id) SHA_REG_CTRL_OUTPUT_READY); omap_sham_read(dd, SHA_REG_CTRL); - if (!test_bit(FLAGS_BUSY, &dd->flags)) { - dev_warn(dd->dev, "Interrupt when no active requests.\n"); - return IRQ_HANDLED; - } + return omap_sham_irq_common(dd); +} - set_bit(FLAGS_OUTPUT_READY, &dd->flags); - tasklet_schedule(&dd->done_task); +static irqreturn_t omap_sham_irq_omap4(int irq, void *dev_id) +{ + struct omap_sham_dev *dd = dev_id; - return IRQ_HANDLED; + omap_sham_write_mask(dd, SHA_REG_MASK(dd), 0, SHA_REG_MASK_IT_EN); + + return omap_sham_irq_common(dd); } -static void omap_sham_dma_callback(int lch, u16 ch_status, void *data) +static struct omap_sham_algs_info omap_sham_algs_info_omap2[] = { + { + .algs_list = algs_sha1_md5, + .size = ARRAY_SIZE(algs_sha1_md5), + }, +}; + +static const struct omap_sham_pdata omap_sham_pdata_omap2 = { + .algs_info = omap_sham_algs_info_omap2, + .algs_info_size = ARRAY_SIZE(omap_sham_algs_info_omap2), + .flags = BIT(FLAGS_BE32_SHA1), + .digest_size = SHA1_DIGEST_SIZE, + .copy_hash = omap_sham_copy_hash_omap2, + .write_ctrl = omap_sham_write_ctrl_omap2, + .trigger = omap_sham_trigger_omap2, + .poll_irq = omap_sham_poll_irq_omap2, + .intr_hdlr = omap_sham_irq_omap2, + .idigest_ofs = 0x00, + .din_ofs = 0x1c, + .digcnt_ofs = 0x14, + .rev_ofs = 0x5c, + .mask_ofs = 0x60, + .sysstatus_ofs = 0x64, + .major_mask = 0xf0, + .major_shift = 4, + .minor_mask = 0x0f, + .minor_shift = 0, +}; + +#ifdef CONFIG_OF +static struct omap_sham_algs_info omap_sham_algs_info_omap4[] = { + { + .algs_list = algs_sha1_md5, + .size = ARRAY_SIZE(algs_sha1_md5), + }, + { + .algs_list = algs_sha224_sha256, + .size = ARRAY_SIZE(algs_sha224_sha256), + }, +}; + +static const struct omap_sham_pdata omap_sham_pdata_omap4 = { + .algs_info = omap_sham_algs_info_omap4, + .algs_info_size = ARRAY_SIZE(omap_sham_algs_info_omap4), + .flags = BIT(FLAGS_AUTO_XOR), + .digest_size = SHA256_DIGEST_SIZE, + .copy_hash = omap_sham_copy_hash_omap4, + .write_ctrl = omap_sham_write_ctrl_omap4, + .trigger = omap_sham_trigger_omap4, + .poll_irq = omap_sham_poll_irq_omap4, + .intr_hdlr = omap_sham_irq_omap4, + .idigest_ofs = 0x020, + .din_ofs = 0x080, + .digcnt_ofs = 0x040, + .rev_ofs = 0x100, + .mask_ofs = 0x110, + .sysstatus_ofs = 0x114, + .major_mask = 0x0700, + .major_shift = 8, + .minor_mask = 0x003f, + .minor_shift = 0, +}; + +static const struct of_device_id omap_sham_of_match[] = { + { + .compatible = "ti,omap2-sham", + .data = &omap_sham_pdata_omap2, + }, + { + .compatible = "ti,omap4-sham", + .data = &omap_sham_pdata_omap4, + }, + {}, +}; +MODULE_DEVICE_TABLE(of, omap_sham_of_match); + +static int omap_sham_get_res_of(struct omap_sham_dev *dd, + struct device *dev, struct resource *res) { - struct omap_sham_dev *dd = data; + struct device_node *node = dev->of_node; + const struct of_device_id *match; + int err = 0; - if (ch_status != OMAP_DMA_BLOCK_IRQ) { - pr_err("omap-sham DMA error status: 0x%hx\n", ch_status); - dd->err = -EIO; - clear_bit(FLAGS_INIT, &dd->flags);/* request to re-initialize */ + match = of_match_device(of_match_ptr(omap_sham_of_match), dev); + if (!match) { + dev_err(dev, "no compatible OF match\n"); + err = -EINVAL; + goto err; } - set_bit(FLAGS_DMA_READY, &dd->flags); - tasklet_schedule(&dd->done_task); + err = of_address_to_resource(node, 0, res); + if (err < 0) { + dev_err(dev, "can't translate OF node address\n"); + err = -EINVAL; + goto err; + } + + dd->irq = of_irq_to_resource(node, 0, NULL); + if (!dd->irq) { + dev_err(dev, "can't translate OF irq value\n"); + err = -EINVAL; + goto err; + } + + dd->dma = -1; /* Dummy value that's unused */ + dd->pdata = match->data; + +err: + return err; } +#else +static const struct of_device_id omap_sham_of_match[] = { + {}, +}; -static int omap_sham_dma_init(struct omap_sham_dev *dd) +static int omap_sham_get_res_of(struct omap_sham_dev *dd, + struct device *dev, struct resource *res) { - int err; + return -EINVAL; +} +#endif - dd->dma_lch = -1; +static int omap_sham_get_res_pdev(struct omap_sham_dev *dd, + struct platform_device *pdev, struct resource *res) +{ + struct device *dev = &pdev->dev; + struct resource *r; + int err = 0; - err = omap_request_dma(dd->dma, dev_name(dd->dev), - omap_sham_dma_callback, dd, &dd->dma_lch); - if (err) { - dev_err(dd->dev, "Unable to request DMA channel\n"); - return err; + /* Get the base address */ + r = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!r) { + dev_err(dev, "no MEM resource info\n"); + err = -ENODEV; + goto err; } + memcpy(res, r, sizeof(*res)); - return 0; -} + /* Get the IRQ */ + dd->irq = platform_get_irq(pdev, 0); + if (dd->irq < 0) { + dev_err(dev, "no IRQ resource info\n"); + err = dd->irq; + goto err; + } -static void omap_sham_dma_cleanup(struct omap_sham_dev *dd) -{ - if (dd->dma_lch >= 0) { - omap_free_dma(dd->dma_lch); - dd->dma_lch = -1; + /* Get the DMA */ + r = platform_get_resource(pdev, IORESOURCE_DMA, 0); + if (!r) { + dev_err(dev, "no DMA resource info\n"); + err = -ENODEV; + goto err; } + dd->dma = r->start; + + /* Only OMAP2/3 can be non-DT */ + dd->pdata = &omap_sham_pdata_omap2; + +err: + return err; } static int omap_sham_probe(struct platform_device *pdev) { struct omap_sham_dev *dd; struct device *dev = &pdev->dev; - struct resource *res; + struct resource res; + dma_cap_mask_t mask; int err, i, j; + u32 rev; dd = kzalloc(sizeof(struct omap_sham_dev), GFP_KERNEL); if (dd == NULL) { @@ -1158,89 +1681,75 @@ static int omap_sham_probe(struct platform_device *pdev) tasklet_init(&dd->done_task, omap_sham_done_task, (unsigned long)dd); crypto_init_queue(&dd->queue, OMAP_SHAM_QUEUE_LENGTH); - dd->irq = -1; - - /* Get the base address */ - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) { - dev_err(dev, "no MEM resource info\n"); - err = -ENODEV; - goto res_err; - } - dd->phys_base = res->start; - - /* Get the DMA */ - res = platform_get_resource(pdev, IORESOURCE_DMA, 0); - if (!res) { - dev_err(dev, "no DMA resource info\n"); - err = -ENODEV; + err = (dev->of_node) ? omap_sham_get_res_of(dd, dev, &res) : + omap_sham_get_res_pdev(dd, pdev, &res); + if (err) goto res_err; - } - dd->dma = res->start; - /* Get the IRQ */ - dd->irq = platform_get_irq(pdev, 0); - if (dd->irq < 0) { - dev_err(dev, "no IRQ resource info\n"); - err = dd->irq; + dd->io_base = devm_request_and_ioremap(dev, &res); + if (!dd->io_base) { + dev_err(dev, "can't ioremap\n"); + err = -ENOMEM; goto res_err; } + dd->phys_base = res.start; - err = request_irq(dd->irq, omap_sham_irq, - IRQF_TRIGGER_LOW, dev_name(dev), dd); + err = request_irq(dd->irq, dd->pdata->intr_hdlr, IRQF_TRIGGER_LOW, + dev_name(dev), dd); if (err) { dev_err(dev, "unable to request irq.\n"); goto res_err; } - err = omap_sham_dma_init(dd); - if (err) - goto dma_err; + dma_cap_zero(mask); + dma_cap_set(DMA_SLAVE, mask); - /* Initializing the clock */ - dd->iclk = clk_get(dev, "ick"); - if (IS_ERR(dd->iclk)) { - dev_err(dev, "clock intialization failed.\n"); - err = PTR_ERR(dd->iclk); - goto clk_err; + dd->dma_lch = dma_request_slave_channel_compat(mask, omap_dma_filter_fn, + &dd->dma, dev, "rx"); + if (!dd->dma_lch) { + dev_err(dev, "unable to obtain RX DMA engine channel %u\n", + dd->dma); + err = -ENXIO; + goto dma_err; } - dd->io_base = ioremap(dd->phys_base, SZ_4K); - if (!dd->io_base) { - dev_err(dev, "can't ioremap\n"); - err = -ENOMEM; - goto io_err; - } + dd->flags |= dd->pdata->flags; + + pm_runtime_enable(dev); + pm_runtime_get_sync(dev); + rev = omap_sham_read(dd, SHA_REG_REV(dd)); + pm_runtime_put_sync(&pdev->dev); - clk_enable(dd->iclk); dev_info(dev, "hw accel on OMAP rev %u.%u\n", - (omap_sham_read(dd, SHA_REG_REV) & SHA_REG_REV_MAJOR) >> 4, - omap_sham_read(dd, SHA_REG_REV) & SHA_REG_REV_MINOR); - clk_disable(dd->iclk); + (rev & dd->pdata->major_mask) >> dd->pdata->major_shift, + (rev & dd->pdata->minor_mask) >> dd->pdata->minor_shift); spin_lock(&sham.lock); list_add_tail(&dd->list, &sham.dev_list); spin_unlock(&sham.lock); - for (i = 0; i < ARRAY_SIZE(algs); i++) { - err = crypto_register_ahash(&algs[i]); - if (err) - goto err_algs; + for (i = 0; i < dd->pdata->algs_info_size; i++) { + for (j = 0; j < dd->pdata->algs_info[i].size; j++) { + err = crypto_register_ahash( + &dd->pdata->algs_info[i].algs_list[j]); + if (err) + goto err_algs; + + dd->pdata->algs_info[i].registered++; + } } return 0; err_algs: - for (j = 0; j < i; j++) - crypto_unregister_ahash(&algs[j]); - iounmap(dd->io_base); -io_err: - clk_put(dd->iclk); -clk_err: - omap_sham_dma_cleanup(dd); + for (i = dd->pdata->algs_info_size - 1; i >= 0; i--) + for (j = dd->pdata->algs_info[i].registered - 1; j >= 0; j--) + crypto_unregister_ahash( + &dd->pdata->algs_info[i].algs_list[j]); + pm_runtime_disable(dev); + dma_release_channel(dd->dma_lch); dma_err: - if (dd->irq >= 0) - free_irq(dd->irq, dd); + free_irq(dd->irq, dd); res_err: kfree(dd); dd = NULL; @@ -1253,7 +1762,7 @@ data_err: static int omap_sham_remove(struct platform_device *pdev) { static struct omap_sham_dev *dd; - int i; + int i, j; dd = platform_get_drvdata(pdev); if (!dd) @@ -1261,33 +1770,51 @@ static int omap_sham_remove(struct platform_device *pdev) spin_lock(&sham.lock); list_del(&dd->list); spin_unlock(&sham.lock); - for (i = 0; i < ARRAY_SIZE(algs); i++) - crypto_unregister_ahash(&algs[i]); + for (i = dd->pdata->algs_info_size - 1; i >= 0; i--) + for (j = dd->pdata->algs_info[i].registered - 1; j >= 0; j--) + crypto_unregister_ahash( + &dd->pdata->algs_info[i].algs_list[j]); tasklet_kill(&dd->done_task); - iounmap(dd->io_base); - clk_put(dd->iclk); - omap_sham_dma_cleanup(dd); - if (dd->irq >= 0) - free_irq(dd->irq, dd); + pm_runtime_disable(&pdev->dev); + dma_release_channel(dd->dma_lch); + free_irq(dd->irq, dd); kfree(dd); dd = NULL; return 0; } +#ifdef CONFIG_PM_SLEEP +static int omap_sham_suspend(struct device *dev) +{ + pm_runtime_put_sync(dev); + return 0; +} + +static int omap_sham_resume(struct device *dev) +{ + pm_runtime_get_sync(dev); + return 0; +} +#endif + +static const struct dev_pm_ops omap_sham_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(omap_sham_suspend, omap_sham_resume) +}; + static struct platform_driver omap_sham_driver = { .probe = omap_sham_probe, .remove = omap_sham_remove, .driver = { .name = "omap-sham", .owner = THIS_MODULE, + .pm = &omap_sham_pm_ops, + .of_match_table = omap_sham_of_match, }, }; static int __init omap_sham_mod_init(void) { - pr_info("loading %s driver\n", "omap-sham"); - return platform_driver_register(&omap_sham_driver); } |