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path: root/drivers/crypto/omap-aes.c
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Diffstat (limited to 'drivers/crypto/omap-aes.c')
-rw-r--r--drivers/crypto/omap-aes.c158
1 files changed, 125 insertions, 33 deletions
diff --git a/drivers/crypto/omap-aes.c b/drivers/crypto/omap-aes.c
index d34aa5d..bd1ad97 100644
--- a/drivers/crypto/omap-aes.c
+++ b/drivers/crypto/omap-aes.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
@@ -42,10 +43,11 @@
#define FLD_MASK(start, end) (((1 << ((start) - (end) + 1)) - 1) << (end))
#define FLD_VAL(val, start, end) (((val) << (end)) & FLD_MASK(start, end))
-#define AES_REG_KEY(x) (0x1C - ((x ^ 0x01) * 0x04))
-#define AES_REG_IV(x) (0x20 + ((x) * 0x04))
+#define AES_REG_KEY(dd, x) ((dd)->pdata->key_ofs - \
+ ((x ^ 0x01) * 0x04))
+#define AES_REG_IV(dd, x) ((dd)->pdata->iv_ofs + ((x) * 0x04))
-#define AES_REG_CTRL 0x30
+#define AES_REG_CTRL(dd) ((dd)->pdata->ctrl_ofs)
#define AES_REG_CTRL_CTR_WIDTH (1 << 7)
#define AES_REG_CTRL_CTR (1 << 6)
#define AES_REG_CTRL_CBC (1 << 5)
@@ -54,14 +56,11 @@
#define AES_REG_CTRL_INPUT_READY (1 << 1)
#define AES_REG_CTRL_OUTPUT_READY (1 << 0)
-#define AES_REG_DATA 0x34
-#define AES_REG_DATA_N(x) (0x34 + ((x) * 0x04))
+#define AES_REG_DATA_N(dd, x) ((dd)->pdata->data_ofs + ((x) * 0x04))
-#define AES_REG_REV 0x44
-#define AES_REG_REV_MAJOR 0xF0
-#define AES_REG_REV_MINOR 0x0F
+#define AES_REG_REV(dd) ((dd)->pdata->rev_ofs)
-#define AES_REG_MASK 0x48
+#define AES_REG_MASK(dd) ((dd)->pdata->mask_ofs)
#define AES_REG_MASK_SIDLE (1 << 6)
#define AES_REG_MASK_START (1 << 5)
#define AES_REG_MASK_DMA_OUT_EN (1 << 3)
@@ -69,8 +68,7 @@
#define AES_REG_MASK_SOFTRESET (1 << 1)
#define AES_REG_AUTOIDLE (1 << 0)
-#define AES_REG_SYSSTATUS 0x4C
-#define AES_REG_SYSSTATUS_RESETDONE (1 << 0)
+#define AES_REG_LENGTH_N(x) (0x54 + ((x) * 0x04))
#define DEFAULT_TIMEOUT (5*HZ)
@@ -98,6 +96,26 @@ struct omap_aes_reqctx {
#define OMAP_AES_QUEUE_LENGTH 1
#define OMAP_AES_CACHE_SIZE 0
+struct omap_aes_pdata {
+ void (*trigger)(struct omap_aes_dev *dd, int length);
+
+ u32 key_ofs;
+ u32 iv_ofs;
+ u32 ctrl_ofs;
+ u32 data_ofs;
+ u32 rev_ofs;
+ u32 mask_ofs;
+
+ u32 dma_enable_in;
+ u32 dma_enable_out;
+ u32 dma_start;
+
+ u32 major_mask;
+ u32 major_shift;
+ u32 minor_mask;
+ u32 minor_shift;
+};
+
struct omap_aes_dev {
struct list_head list;
unsigned long phys_base;
@@ -132,6 +150,8 @@ struct omap_aes_dev {
int dma_out;
struct dma_chan *dma_lch_out;
dma_addr_t dma_addr_out;
+
+ const struct omap_aes_pdata *pdata;
};
/* keep registered devices data here */
@@ -194,26 +214,16 @@ static int omap_aes_write_ctrl(struct omap_aes_dev *dd)
if (err)
return err;
- val = 0;
- if (dd->dma_lch_out != NULL)
- val |= AES_REG_MASK_DMA_OUT_EN;
- if (dd->dma_lch_in != NULL)
- val |= AES_REG_MASK_DMA_IN_EN;
-
- mask = AES_REG_MASK_DMA_IN_EN | AES_REG_MASK_DMA_OUT_EN;
-
- omap_aes_write_mask(dd, AES_REG_MASK, val, mask);
-
key32 = dd->ctx->keylen / sizeof(u32);
/* it seems a key should always be set even if it has not changed */
for (i = 0; i < key32; i++) {
- omap_aes_write(dd, AES_REG_KEY(i),
+ omap_aes_write(dd, AES_REG_KEY(dd, i),
__le32_to_cpu(dd->ctx->key[i]));
}
if ((dd->flags & FLAGS_CBC) && dd->req->info)
- omap_aes_write_n(dd, AES_REG_IV(0), dd->req->info, 4);
+ omap_aes_write_n(dd, AES_REG_IV(dd, 0), dd->req->info, 4);
val = FLD_VAL(((dd->ctx->keylen >> 3) - 1), 4, 3);
if (dd->flags & FLAGS_CBC)
@@ -224,11 +234,47 @@ static int omap_aes_write_ctrl(struct omap_aes_dev *dd)
mask = AES_REG_CTRL_CBC | AES_REG_CTRL_DIRECTION |
AES_REG_CTRL_KEY_SIZE;
- omap_aes_write_mask(dd, AES_REG_CTRL, val, mask);
+ omap_aes_write_mask(dd, AES_REG_CTRL(dd), val, mask);
return 0;
}
+static void omap_aes_dma_trigger_omap2(struct omap_aes_dev *dd, int length)
+{
+ u32 mask, val;
+
+ val = dd->pdata->dma_start;
+
+ if (dd->dma_lch_out != NULL)
+ val |= dd->pdata->dma_enable_out;
+ if (dd->dma_lch_in != NULL)
+ val |= dd->pdata->dma_enable_in;
+
+ mask = dd->pdata->dma_enable_out | dd->pdata->dma_enable_in |
+ dd->pdata->dma_start;
+
+ omap_aes_write_mask(dd, AES_REG_MASK(dd), val, mask);
+
+}
+
+static void omap_aes_dma_trigger_omap4(struct omap_aes_dev *dd, int length)
+{
+ omap_aes_write(dd, AES_REG_LENGTH_N(0), length);
+ omap_aes_write(dd, AES_REG_LENGTH_N(1), 0);
+
+ omap_aes_dma_trigger_omap2(dd, length);
+}
+
+static void omap_aes_dma_stop(struct omap_aes_dev *dd)
+{
+ u32 mask;
+
+ mask = dd->pdata->dma_enable_out | dd->pdata->dma_enable_in |
+ dd->pdata->dma_start;
+
+ omap_aes_write_mask(dd, AES_REG_MASK(dd), 0, mask);
+}
+
static struct omap_aes_dev *omap_aes_find_dev(struct omap_aes_ctx *ctx)
{
struct omap_aes_dev *dd = NULL, *tmp;
@@ -413,8 +459,8 @@ static int omap_aes_crypt_dma(struct crypto_tfm *tfm,
memset(&cfg, 0, sizeof(cfg));
- cfg.src_addr = dd->phys_base + AES_REG_DATA;
- cfg.dst_addr = dd->phys_base + AES_REG_DATA;
+ cfg.src_addr = dd->phys_base + AES_REG_DATA_N(dd, 0);
+ cfg.dst_addr = dd->phys_base + AES_REG_DATA_N(dd, 0);
cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
cfg.src_maxburst = DST_MAXBURST;
@@ -464,9 +510,8 @@ static int omap_aes_crypt_dma(struct crypto_tfm *tfm,
dma_async_issue_pending(dd->dma_lch_in);
dma_async_issue_pending(dd->dma_lch_out);
- /* start DMA or disable idle mode */
- omap_aes_write_mask(dd, AES_REG_MASK, AES_REG_MASK_START,
- AES_REG_MASK_START);
+ /* start DMA */
+ dd->pdata->trigger(dd, length);
return 0;
}
@@ -586,7 +631,7 @@ static int omap_aes_crypt_dma_stop(struct omap_aes_dev *dd)
pr_debug("total: %d\n", dd->total);
- omap_aes_write_mask(dd, AES_REG_MASK, 0, AES_REG_MASK_START);
+ omap_aes_dma_stop(dd);
dmaengine_terminate_all(dd->dma_lch_in);
dmaengine_terminate_all(dd->dma_lch_out);
@@ -826,10 +871,48 @@ static struct crypto_alg algs[] = {
}
};
+static const struct omap_aes_pdata omap_aes_pdata_omap2 = {
+ .trigger = omap_aes_dma_trigger_omap2,
+ .key_ofs = 0x1c,
+ .iv_ofs = 0x20,
+ .ctrl_ofs = 0x30,
+ .data_ofs = 0x34,
+ .rev_ofs = 0x44,
+ .mask_ofs = 0x48,
+ .dma_enable_in = BIT(2),
+ .dma_enable_out = BIT(3),
+ .dma_start = BIT(5),
+ .major_mask = 0xf0,
+ .major_shift = 4,
+ .minor_mask = 0x0f,
+ .minor_shift = 0,
+};
+
#ifdef CONFIG_OF
+static const struct omap_aes_pdata omap_aes_pdata_omap4 = {
+ .trigger = omap_aes_dma_trigger_omap4,
+ .key_ofs = 0x3c,
+ .iv_ofs = 0x40,
+ .ctrl_ofs = 0x50,
+ .data_ofs = 0x60,
+ .rev_ofs = 0x80,
+ .mask_ofs = 0x84,
+ .dma_enable_in = BIT(5),
+ .dma_enable_out = BIT(6),
+ .major_mask = 0x0700,
+ .major_shift = 8,
+ .minor_mask = 0x003f,
+ .minor_shift = 0,
+};
+
static const struct of_device_id omap_aes_of_match[] = {
{
.compatible = "ti,omap2-aes",
+ .data = &omap_aes_pdata_omap2,
+ },
+ {
+ .compatible = "ti,omap4-aes",
+ .data = &omap_aes_pdata_omap4,
},
{},
};
@@ -859,6 +942,8 @@ static int omap_aes_get_res_of(struct omap_aes_dev *dd,
dd->dma_out = -1; /* Dummy value that's unused */
dd->dma_in = -1; /* Dummy value that's unused */
+ dd->pdata = match->data;
+
err:
return err;
}
@@ -908,6 +993,9 @@ static int omap_aes_get_res_pdev(struct omap_aes_dev *dd,
}
dd->dma_in = r->start;
+ /* Only OMAP2/3 can be non-DT */
+ dd->pdata = &omap_aes_pdata_omap2;
+
err:
return err;
}
@@ -947,12 +1035,16 @@ static int omap_aes_probe(struct platform_device *pdev)
pm_runtime_enable(dev);
pm_runtime_get_sync(dev);
- reg = omap_aes_read(dd, AES_REG_REV);
- dev_info(dev, "OMAP AES hw accel rev: %u.%u\n",
- (reg & AES_REG_REV_MAJOR) >> 4, reg & AES_REG_REV_MINOR);
+ omap_aes_dma_stop(dd);
+
+ reg = omap_aes_read(dd, AES_REG_REV(dd));
pm_runtime_put_sync(dev);
+ dev_info(dev, "OMAP AES hw accel rev: %u.%u\n",
+ (reg & dd->pdata->major_mask) >> dd->pdata->major_shift,
+ (reg & dd->pdata->minor_mask) >> dd->pdata->minor_shift);
+
tasklet_init(&dd->done_task, omap_aes_done_task, (unsigned long)dd);
tasklet_init(&dd->queue_task, omap_aes_queue_task, (unsigned long)dd);
generated by cgit v0.10.2 at 2024-11-19 08:08:23 (GMT)