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crypto: ux500/cryp - Set DMA configuration though dma_slave_config() 

The DMA controller currently takes configuration information from
information passed though dma_channel_request(), but it shouldn't.
Using the API, the DMA channel should only be configured during
a dma_slave_config() call.

Cc: David S. Miller <davem@davemloft.net>
Cc: Andreas Westin <andreas.westin@stericsson.com>
Cc: linux-crypto@vger.kernel.org
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Lee Jones 2013-05-15 10:51:39 +01:00 committed by Linus Walleij
parent 8703ffdd90
commit 3fc63d762f
2 changed files with 23 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/crypto/ux500/cryp/cryp.h
View File

@ -114,6 +114,9 @@ enum cryp_status_id {
};
/* Cryp DMA interface */
#define CRYP_DMA_TX_FIFO 0x08
#define CRYP_DMA_RX_FIFO 0x10
enum cryp_dma_req_type {
CRYP_DMA_DISABLE_BOTH,
CRYP_DMA_ENABLE_IN_DATA,
@ -217,7 +220,8 @@ struct cryp_dma {
/**
* struct cryp_device_data - structure for a cryp device.
* @base: Pointer to the hardware base address.
* @base: Pointer to virtual base address of the cryp device.
* @phybase: Pointer to physical memory location of the cryp device.
* @dev: Pointer to the devices dev structure.
* @clk: Pointer to the device's clock control.
* @pwr_regulator: Pointer to the device's power control.
@ -232,6 +236,7 @@ struct cryp_dma {
*/
struct cryp_device_data {
struct cryp_register __iomem *base;
phys_addr_t phybase;
struct device *dev;
struct clk *clk;
struct regulator *pwr_regulator;

17
drivers/crypto/ux500/cryp/cryp_core.c
View File

@ -475,6 +475,19 @@ static int cryp_get_device_data(struct cryp_ctx *ctx,
static void cryp_dma_setup_channel(struct cryp_device_data *device_data,
struct device *dev)
{
struct dma_slave_config mem2cryp = {
.direction = DMA_MEM_TO_DEV,
.dst_addr = device_data->phybase + CRYP_DMA_TX_FIFO,
.dst_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES,
.dst_maxburst = 4,
};
struct dma_slave_config cryp2mem = {
.direction = DMA_DEV_TO_MEM,
.src_addr = device_data->phybase + CRYP_DMA_RX_FIFO,
.src_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES,
.src_maxburst = 4,
};
dma_cap_zero(device_data->dma.mask);
dma_cap_set(DMA_SLAVE, device_data->dma.mask);
@ -490,6 +503,9 @@ static void cryp_dma_setup_channel(struct cryp_device_data *device_data,
stedma40_filter,
device_data->dma.cfg_cryp2mem);
dmaengine_slave_config(device_data->dma.chan_mem2cryp, &mem2cryp);
dmaengine_slave_config(device_data->dma.chan_cryp2mem, &cryp2mem);
init_completion(&device_data->dma.cryp_dma_complete);
}
@ -1431,6 +1447,7 @@ static int ux500_cryp_probe(struct platform_device *pdev)
goto out_kfree;
}
device_data->phybase = res->start;
device_data->base = ioremap(res->start, resource_size(res));
if (!device_data->base) {
dev_err(dev, "[%s]: ioremap failed!", __func__);