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Subject[PATCH 16/39] crypto: ux500/cryp - Set DMA configuration though dma_slave_config()
Date
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: Herbert Xu <herbert@gondor.apana.org.au>
Cc: David S. Miller <davem@davemloft.net>
Cc: Andreas Westin <andreas.westin@stericsson.com>
Cc: linux-crypto@vger.kernel.org
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
drivers/crypto/ux500/cryp/cryp.h | 7 ++++++-
drivers/crypto/ux500/cryp/cryp_core.c | 17 +++++++++++++++++
2 files changed, 23 insertions(+), 1 deletion(-)

diff --git a/drivers/crypto/ux500/cryp/cryp.h b/drivers/crypto/ux500/cryp/cryp.h
index 14cfd05..d1d6606 100644
--- a/drivers/crypto/ux500/cryp/cryp.h
+++ b/drivers/crypto/ux500/cryp/cryp.h
@@ -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;
diff --git a/drivers/crypto/ux500/cryp/cryp_core.c b/drivers/crypto/ux500/cryp/cryp_core.c
index ccdf173..d9c863d 100644
--- a/drivers/crypto/ux500/cryp/cryp_core.c
+++ b/drivers/crypto/ux500/cryp/cryp_core.c
@@ -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__);
--
1.7.10.4


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