diff options
Diffstat (limited to 'arch/arm/plat-samsung/s3c-dma-ops.c')
-rw-r--r-- | arch/arm/plat-samsung/s3c-dma-ops.c | 146 |
1 files changed, 0 insertions, 146 deletions
diff --git a/arch/arm/plat-samsung/s3c-dma-ops.c b/arch/arm/plat-samsung/s3c-dma-ops.c deleted file mode 100644 index 98b10ba67dc7..000000000000 --- a/arch/arm/plat-samsung/s3c-dma-ops.c +++ /dev/null @@ -1,146 +0,0 @@ -/* linux/arch/arm/plat-samsung/s3c-dma-ops.c - * - * Copyright (c) 2011 Samsung Electronics Co., Ltd. - * http://www.samsung.com - * - * Samsung S3C-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/slab.h> -#include <linux/types.h> -#include <linux/export.h> - -#include <mach/dma.h> - -struct cb_data { - void (*fp) (void *); - void *fp_param; - unsigned ch; - struct list_head node; -}; - -static LIST_HEAD(dma_list); - -static void s3c_dma_cb(struct s3c2410_dma_chan *channel, void *param, - int size, enum s3c2410_dma_buffresult res) -{ - struct cb_data *data = param; - - data->fp(data->fp_param); -} - -static unsigned s3c_dma_request(enum dma_ch dma_ch, - struct samsung_dma_req *param, - struct device *dev, char *ch_name) -{ - struct cb_data *data; - - if (s3c2410_dma_request(dma_ch, param->client, NULL) < 0) { - s3c2410_dma_free(dma_ch, param->client); - return 0; - } - - if (param->cap == DMA_CYCLIC) - s3c2410_dma_setflags(dma_ch, S3C2410_DMAF_CIRCULAR); - - data = kzalloc(sizeof(struct cb_data), GFP_KERNEL); - data->ch = dma_ch; - list_add_tail(&data->node, &dma_list); - - return (unsigned)dma_ch; -} - -static int s3c_dma_release(unsigned ch, void *param) -{ - struct cb_data *data; - - list_for_each_entry(data, &dma_list, node) - if (data->ch == ch) - break; - list_del(&data->node); - - s3c2410_dma_free(ch, param); - kfree(data); - - return 0; -} - -static int s3c_dma_config(unsigned ch, struct samsung_dma_config *param) -{ - s3c2410_dma_devconfig(ch, param->direction, param->fifo); - s3c2410_dma_config(ch, param->width); - - return 0; -} - -static int s3c_dma_prepare(unsigned ch, struct samsung_dma_prep *param) -{ - struct cb_data *data; - dma_addr_t pos = param->buf; - dma_addr_t end = param->buf + param->len; - - list_for_each_entry(data, &dma_list, node) - if (data->ch == ch) - break; - - if (!data->fp) { - s3c2410_dma_set_buffdone_fn(ch, s3c_dma_cb); - data->fp = param->fp; - data->fp_param = param->fp_param; - } - - if (param->cap != DMA_CYCLIC) { - s3c2410_dma_enqueue(ch, (void *)data, param->buf, param->len); - return 0; - } - - while (pos < end) { - s3c2410_dma_enqueue(ch, (void *)data, pos, param->period); - pos += param->period; - } - - return 0; -} - -static inline int s3c_dma_trigger(unsigned ch) -{ - return s3c2410_dma_ctrl(ch, S3C2410_DMAOP_START); -} - -static inline int s3c_dma_started(unsigned ch) -{ - return s3c2410_dma_ctrl(ch, S3C2410_DMAOP_STARTED); -} - -static inline int s3c_dma_flush(unsigned ch) -{ - return s3c2410_dma_ctrl(ch, S3C2410_DMAOP_FLUSH); -} - -static inline int s3c_dma_stop(unsigned ch) -{ - return s3c2410_dma_ctrl(ch, S3C2410_DMAOP_STOP); -} - -static struct samsung_dma_ops s3c_dma_ops = { - .request = s3c_dma_request, - .release = s3c_dma_release, - .config = s3c_dma_config, - .prepare = s3c_dma_prepare, - .trigger = s3c_dma_trigger, - .started = s3c_dma_started, - .flush = s3c_dma_flush, - .stop = s3c_dma_stop, -}; - -void *s3c_dma_get_ops(void) -{ - return &s3c_dma_ops; -} -EXPORT_SYMBOL(s3c_dma_get_ops); |