summaryrefslogtreecommitdiff
path: root/arch/arm/plat-samsung/dma-ops.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/plat-samsung/dma-ops.c')
-rw-r--r--arch/arm/plat-samsung/dma-ops.c146
1 files changed, 0 insertions, 146 deletions
diff --git a/arch/arm/plat-samsung/dma-ops.c b/arch/arm/plat-samsung/dma-ops.c
deleted file mode 100644
index 886326ee6f6c..000000000000
--- a/arch/arm/plat-samsung/dma-ops.c
+++ /dev/null
@@ -1,146 +0,0 @@
-/* linux/arch/arm/plat-samsung/dma-ops.c
- *
- * Copyright (c) 2011 Samsung Electronics Co., Ltd.
- * http://www.samsung.com
- *
- * Samsung DMA Operations
- *
- * 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 by the Free Software Foundation.
- */
-
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/amba/pl330.h>
-#include <linux/scatterlist.h>
-#include <linux/export.h>
-
-#include <mach/dma.h>
-
-#if defined(CONFIG_PL330_DMA)
-#define dma_filter pl330_filter
-#elif defined(CONFIG_S3C64XX_PL080)
-#define dma_filter pl08x_filter_id
-#endif
-
-static unsigned samsung_dmadev_request(enum dma_ch dma_ch,
- struct samsung_dma_req *param,
- struct device *dev, char *ch_name)
-{
- dma_cap_mask_t mask;
-
- dma_cap_zero(mask);
- dma_cap_set(param->cap, mask);
-
- if (dev->of_node)
- return (unsigned)dma_request_slave_channel(dev, ch_name);
- else
- return (unsigned)dma_request_channel(mask, dma_filter,
- (void *)dma_ch);
-}
-
-static int samsung_dmadev_release(unsigned ch, void *param)
-{
- dma_release_channel((struct dma_chan *)ch);
-
- return 0;
-}
-
-static int samsung_dmadev_config(unsigned ch,
- struct samsung_dma_config *param)
-{
- struct dma_chan *chan = (struct dma_chan *)ch;
- struct dma_slave_config slave_config;
-
- if (param->direction == DMA_DEV_TO_MEM) {
- memset(&slave_config, 0, sizeof(struct dma_slave_config));
- slave_config.direction = param->direction;
- slave_config.src_addr = param->fifo;
- slave_config.src_addr_width = param->width;
- slave_config.src_maxburst = 1;
- dmaengine_slave_config(chan, &slave_config);
- } else if (param->direction == DMA_MEM_TO_DEV) {
- memset(&slave_config, 0, sizeof(struct dma_slave_config));
- slave_config.direction = param->direction;
- slave_config.dst_addr = param->fifo;
- slave_config.dst_addr_width = param->width;
- slave_config.dst_maxburst = 1;
- dmaengine_slave_config(chan, &slave_config);
- } else {
- pr_warn("unsupported direction\n");
- return -EINVAL;
- }
-
- return 0;
-}
-
-static int samsung_dmadev_prepare(unsigned ch,
- struct samsung_dma_prep *param)
-{
- struct scatterlist sg;
- struct dma_chan *chan = (struct dma_chan *)ch;
- struct dma_async_tx_descriptor *desc;
-
- switch (param->cap) {
- case DMA_SLAVE:
- sg_init_table(&sg, 1);
- sg_dma_len(&sg) = param->len;
- sg_set_page(&sg, pfn_to_page(PFN_DOWN(param->buf)),
- param->len, offset_in_page(param->buf));
- sg_dma_address(&sg) = param->buf;
-
- desc = dmaengine_prep_slave_sg(chan,
- &sg, 1, param->direction, DMA_PREP_INTERRUPT);
- break;
- case DMA_CYCLIC:
- desc = dmaengine_prep_dma_cyclic(chan, param->buf,
- param->len, param->period, param->direction,
- DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
- break;
- default:
- dev_err(&chan->dev->device, "unsupported format\n");
- return -EFAULT;
- }
-
- if (!desc) {
- dev_err(&chan->dev->device, "cannot prepare cyclic dma\n");
- return -EFAULT;
- }
-
- desc->callback = param->fp;
- desc->callback_param = param->fp_param;
-
- dmaengine_submit((struct dma_async_tx_descriptor *)desc);
-
- return 0;
-}
-
-static inline int samsung_dmadev_trigger(unsigned ch)
-{
- dma_async_issue_pending((struct dma_chan *)ch);
-
- return 0;
-}
-
-static inline int samsung_dmadev_flush(unsigned ch)
-{
- return dmaengine_terminate_all((struct dma_chan *)ch);
-}
-
-static struct samsung_dma_ops dmadev_ops = {
- .request = samsung_dmadev_request,
- .release = samsung_dmadev_release,
- .config = samsung_dmadev_config,
- .prepare = samsung_dmadev_prepare,
- .trigger = samsung_dmadev_trigger,
- .started = NULL,
- .flush = samsung_dmadev_flush,
- .stop = samsung_dmadev_flush,
-};
-
-void *samsung_dmadev_get_ops(void)
-{
- return &dmadev_ops;
-}
-EXPORT_SYMBOL(samsung_dmadev_get_ops);