From: Lee Jones Subject: [PATCH 6/9] crypto: ux500/cryp - Set DMA configuration though dma_slave_config() Date: Thu, 18 Apr 2013 11:27:02 +0100 Message-ID: <1366280825-31136-7-git-send-email-lee.jones@linaro.org> References: <1366280825-31136-1-git-send-email-lee.jones@linaro.org> Cc: arnd@arndb.de, linus.walleij@stericsson.com, Lee Jones , Herbert Xu , "David S. Miller" , Andreas Westin , linux-crypto@vger.kernel.org To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Return-path: In-Reply-To: <1366280825-31136-1-git-send-email-lee.jones@linaro.org> Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-crypto.vger.kernel.org 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 Cc: David S. Miller Cc: Andreas Westin Cc: linux-crypto@vger.kernel.org Signed-off-by: Lee Jones --- 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..49b2095 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 HASH_DMA_TX_FIFO 0x08 +#define HASH_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 444deaf..6c4f872 100644 --- a/drivers/crypto/ux500/cryp/cryp_core.c +++ b/drivers/crypto/ux500/cryp/cryp_core.c @@ -476,6 +476,19 @@ 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 + HASH_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 + HASH_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); @@ -491,6 +504,9 @@ 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); } @@ -1432,6 +1448,7 @@ 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