diff options
| -rw-r--r-- | arch/arm/mach-s3c2410/include/mach/dma.h | 8 | ||||
| -rw-r--r-- | arch/arm/mach-s3c64xx/include/mach/dma.h | 4 | ||||
| -rw-r--r-- | arch/arm/plat-samsung/Makefile | 6 | ||||
| -rw-r--r-- | arch/arm/plat-samsung/dma-ops.c | 131 | ||||
| -rw-r--r-- | arch/arm/plat-samsung/include/plat/dma-ops.h | 63 | ||||
| -rw-r--r-- | arch/arm/plat-samsung/include/plat/dma-pl330.h | 4 | ||||
| -rw-r--r-- | arch/arm/plat-samsung/include/plat/dma.h | 1 | ||||
| -rw-r--r-- | arch/arm/plat-samsung/s3c-dma-ops.c | 133 |
8 files changed, 347 insertions, 3 deletions
diff --git a/arch/arm/mach-s3c2410/include/mach/dma.h b/arch/arm/mach-s3c2410/include/mach/dma.h index b2b2a5b..e61a91f 100644 --- a/arch/arm/mach-s3c2410/include/mach/dma.h +++ b/arch/arm/mach-s3c2410/include/mach/dma.h @@ -13,7 +13,6 @@ #ifndef __ASM_ARCH_DMA_H #define __ASM_ARCH_DMA_H __FILE__ -#include <plat/dma.h> #include <linux/sysdev.h> #define MAX_DMA_TRANSFER_SIZE 0x100000 /* Data Unit is half word */ @@ -51,6 +50,13 @@ enum dma_ch { DMACH_MAX, /* the end entry */ }; +static inline bool samsung_dma_is_dmadev(void) +{ + return false; +} + +#include <plat/dma.h> + #define DMACH_LOW_LEVEL (1<<28) /* use this to specifiy hardware ch no */ /* we have 4 dma channels */ diff --git a/arch/arm/mach-s3c64xx/include/mach/dma.h b/arch/arm/mach-s3c64xx/include/mach/dma.h index 0a5d926..49c3a53 100644 --- a/arch/arm/mach-s3c64xx/include/mach/dma.h +++ b/arch/arm/mach-s3c64xx/include/mach/dma.h @@ -63,6 +63,10 @@ static __inline__ bool s3c_dma_has_circular(void) return true; } +static inline bool samsung_dma_is_dmadev(void) +{ + return false; +} #define S3C2410_DMAF_CIRCULAR (1 << 0) #include <plat/dma.h> diff --git a/arch/arm/plat-samsung/Makefile b/arch/arm/plat-samsung/Makefile index 853764b..e2ee0b8 100644 --- a/arch/arm/plat-samsung/Makefile +++ b/arch/arm/plat-samsung/Makefile @@ -63,9 +63,11 @@ obj-$(CONFIG_SAMSUNG_DEV_BACKLIGHT) += dev-backlight.o # DMA support -obj-$(CONFIG_S3C_DMA) += dma.o +obj-$(CONFIG_S3C_DMA) += dma.o s3c-dma-ops.o -obj-$(CONFIG_S3C_PL330_DMA) += s3c-pl330.o +obj-$(CONFIG_SAMSUNG_DMADEV) += dma-ops.o + +obj-$(CONFIG_S3C_PL330_DMA) += s3c-pl330.o s3c-dma-ops.o # PM support diff --git a/arch/arm/plat-samsung/dma-ops.c b/arch/arm/plat-samsung/dma-ops.c new file mode 100644 index 0000000..6e3d9ab --- /dev/null +++ b/arch/arm/plat-samsung/dma-ops.c @@ -0,0 +1,131 @@ +/* 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 <mach/dma.h> + +static inline bool pl330_filter(struct dma_chan *chan, void *param) +{ + struct dma_pl330_peri *peri = chan->private; + return peri->peri_id == (unsigned)param; +} + +static unsigned samsung_dmadev_request(enum dma_ch dma_ch, + struct samsung_dma_info *info) +{ + struct dma_chan *chan; + dma_cap_mask_t mask; + struct dma_slave_config slave_config; + + dma_cap_zero(mask); + dma_cap_set(info->cap, mask); + + chan = dma_request_channel(mask, pl330_filter, (void *)dma_ch); + + if (info->direction == DMA_FROM_DEVICE) { + memset(&slave_config, 0, sizeof(struct dma_slave_config)); + slave_config.direction = info->direction; + slave_config.src_addr = info->fifo; + slave_config.src_addr_width = info->width; + slave_config.src_maxburst = 1; + dmaengine_slave_config(chan, &slave_config); + } else if (info->direction == DMA_TO_DEVICE) { + memset(&slave_config, 0, sizeof(struct dma_slave_config)); + slave_config.direction = info->direction; + slave_config.dst_addr = info->fifo; + slave_config.dst_addr_width = info->width; + slave_config.dst_maxburst = 1; + dmaengine_slave_config(chan, &slave_config); + } + + return (unsigned)chan; +} + +static int samsung_dmadev_release(unsigned ch, + struct s3c2410_dma_client *client) +{ + dma_release_channel((struct dma_chan *)ch); + + return 0; +} + +static int samsung_dmadev_prepare(unsigned ch, + struct samsung_dma_prep_info *info) +{ + struct scatterlist sg; + struct dma_chan *chan = (struct dma_chan *)ch; + struct dma_async_tx_descriptor *desc; + + switch (info->cap) { + case DMA_SLAVE: + sg_init_table(&sg, 1); + sg_dma_len(&sg) = info->len; + sg_set_page(&sg, pfn_to_page(PFN_DOWN(info->buf)), + info->len, offset_in_page(info->buf)); + sg_dma_address(&sg) = info->buf; + + desc = chan->device->device_prep_slave_sg(chan, + &sg, 1, info->direction, DMA_PREP_INTERRUPT); + break; + case DMA_CYCLIC: + desc = chan->device->device_prep_dma_cyclic(chan, + info->buf, info->len, info->period, info->direction); + 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 = info->fp; + desc->callback_param = info->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); +} + +struct samsung_dma_ops dmadev_ops = { + .request = samsung_dmadev_request, + .release = samsung_dmadev_release, + .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); diff --git a/arch/arm/plat-samsung/include/plat/dma-ops.h b/arch/arm/plat-samsung/include/plat/dma-ops.h new file mode 100644 index 0000000..4c1a363 --- /dev/null +++ b/arch/arm/plat-samsung/include/plat/dma-ops.h @@ -0,0 +1,63 @@ +/* arch/arm/plat-samsung/include/plat/dma-ops.h + * + * Copyright (c) 2011 Samsung Electronics Co., Ltd. + * http://www.samsung.com + * + * Samsung DMA support + * + * 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. + */ + +#ifndef __SAMSUNG_DMA_OPS_H_ +#define __SAMSUNG_DMA_OPS_H_ __FILE__ + +#include <linux/dmaengine.h> + +struct samsung_dma_prep_info { + enum dma_transaction_type cap; + enum dma_data_direction direction; + dma_addr_t buf; + unsigned long period; + unsigned long len; + void (*fp)(void *data); + void *fp_param; +}; + +struct samsung_dma_info { + enum dma_transaction_type cap; + enum dma_data_direction direction; + enum dma_slave_buswidth width; + dma_addr_t fifo; + struct s3c2410_dma_client *client; +}; + +struct samsung_dma_ops { + unsigned (*request)(enum dma_ch ch, struct samsung_dma_info *info); + int (*release)(unsigned ch, struct s3c2410_dma_client *client); + int (*prepare)(unsigned ch, struct samsung_dma_prep_info *info); + int (*trigger)(unsigned ch); + int (*started)(unsigned ch); + int (*flush)(unsigned ch); + int (*stop)(unsigned ch); +}; + +extern void *samsung_dmadev_get_ops(void); +extern void *s3c_dma_get_ops(void); + +static inline void *__samsung_dma_get_ops(void) +{ + if (samsung_dma_is_dmadev()) + return samsung_dmadev_get_ops(); + else + return s3c_dma_get_ops(); +} + +/* + * samsung_dma_get_ops + * get the set of samsung dma operations + */ +#define samsung_dma_get_ops() __samsung_dma_get_ops() + +#endif /* __SAMSUNG_DMA_OPS_H_ */ diff --git a/arch/arm/plat-samsung/include/plat/dma-pl330.h b/arch/arm/plat-samsung/include/plat/dma-pl330.h index 0a5dade..2916920 100644 --- a/arch/arm/plat-samsung/include/plat/dma-pl330.h +++ b/arch/arm/plat-samsung/include/plat/dma-pl330.h @@ -93,6 +93,10 @@ static inline bool s3c_dma_has_circular(void) return true; } +static inline bool samsung_dma_is_dmadev(void) +{ + return true; +} #include <plat/dma.h> #endif /* __DMA_PL330_H_ */ diff --git a/arch/arm/plat-samsung/include/plat/dma.h b/arch/arm/plat-samsung/include/plat/dma.h index 8c273b7..3610760 100644 --- a/arch/arm/plat-samsung/include/plat/dma.h +++ b/arch/arm/plat-samsung/include/plat/dma.h @@ -126,3 +126,4 @@ extern int s3c2410_dma_set_opfn(enum dma_ch, s3c2410_dma_opfn_t rtn); extern int s3c2410_dma_set_buffdone_fn(enum dma_ch, s3c2410_dma_cbfn_t rtn); +#include <plat/dma-ops.h> diff --git a/arch/arm/plat-samsung/s3c-dma-ops.c b/arch/arm/plat-samsung/s3c-dma-ops.c new file mode 100644 index 0000000..33ab324 --- /dev/null +++ b/arch/arm/plat-samsung/s3c-dma-ops.c @@ -0,0 +1,133 @@ +/* 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 <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_info *info) +{ + struct cb_data *data; + + if (s3c2410_dma_request(dma_ch, info->client, NULL) < 0) { + s3c2410_dma_free(dma_ch, info->client); + return 0; + } + + data = kzalloc(sizeof(struct cb_data), GFP_KERNEL); + data->ch = dma_ch; + list_add_tail(&data->node, &dma_list); + + if (info->direction == DMA_FROM_DEVICE) + s3c2410_dma_devconfig(dma_ch, S3C2410_DMASRC_HW, info->fifo); + else + s3c2410_dma_devconfig(dma_ch, S3C2410_DMASRC_MEM, info->fifo); + + if (info->cap == DMA_CYCLIC) + s3c2410_dma_setflags(dma_ch, S3C2410_DMAF_CIRCULAR); + + s3c2410_dma_config(dma_ch, info->width); + + return (unsigned)dma_ch; +} + +static int s3c_dma_release(unsigned ch, struct s3c2410_dma_client *client) +{ + 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, client); + kfree(data); + + return 0; +} + +static int s3c_dma_prepare(unsigned ch, struct samsung_dma_prep_info *info) +{ + struct cb_data *data; + int len = (info->cap == DMA_CYCLIC) ? info->period : info->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 = info->fp; + data->fp_param = info->fp_param; + } + + s3c2410_dma_enqueue(ch, (void *)data, info->buf, len); + + 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, + .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); |