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-rw-r--r--arch/arm/mach-s3c2410/include/mach/dma.h8
-rw-r--r--arch/arm/mach-s3c64xx/include/mach/dma.h4
-rw-r--r--arch/arm/plat-samsung/Makefile6
-rw-r--r--arch/arm/plat-samsung/dma-ops.c131
-rw-r--r--arch/arm/plat-samsung/include/plat/dma-ops.h63
-rw-r--r--arch/arm/plat-samsung/include/plat/dma-pl330.h4
-rw-r--r--arch/arm/plat-samsung/include/plat/dma.h1
-rw-r--r--arch/arm/plat-samsung/s3c-dma-ops.c133
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 b2b2a5bb275e..e61a91f88c52 100644
--- a/arch/arm/mach-s3c2410/include/mach/dma.h
+++ b/arch/arm/mach-s3c2410/include/mach/dma.h
@@ -13,7 +13,6 @@
13#ifndef __ASM_ARCH_DMA_H 13#ifndef __ASM_ARCH_DMA_H
14#define __ASM_ARCH_DMA_H __FILE__ 14#define __ASM_ARCH_DMA_H __FILE__
15 15
16#include <plat/dma.h>
17#include <linux/sysdev.h> 16#include <linux/sysdev.h>
18 17
19#define MAX_DMA_TRANSFER_SIZE 0x100000 /* Data Unit is half word */ 18#define MAX_DMA_TRANSFER_SIZE 0x100000 /* Data Unit is half word */
@@ -51,6 +50,13 @@ enum dma_ch {
51 DMACH_MAX, /* the end entry */ 50 DMACH_MAX, /* the end entry */
52}; 51};
53 52
53static inline bool samsung_dma_is_dmadev(void)
54{
55 return false;
56}
57
58#include <plat/dma.h>
59
54#define DMACH_LOW_LEVEL (1<<28) /* use this to specifiy hardware ch no */ 60#define DMACH_LOW_LEVEL (1<<28) /* use this to specifiy hardware ch no */
55 61
56/* we have 4 dma channels */ 62/* 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 0a5d9268a23e..49c3a53135d4 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)
63 return true; 63 return true;
64} 64}
65 65
66static inline bool samsung_dma_is_dmadev(void)
67{
68 return false;
69}
66#define S3C2410_DMAF_CIRCULAR (1 << 0) 70#define S3C2410_DMAF_CIRCULAR (1 << 0)
67 71
68#include <plat/dma.h> 72#include <plat/dma.h>
diff --git a/arch/arm/plat-samsung/Makefile b/arch/arm/plat-samsung/Makefile
index 853764ba8cc5..e2ee0b8a3763 100644
--- a/arch/arm/plat-samsung/Makefile
+++ b/arch/arm/plat-samsung/Makefile
@@ -63,9 +63,11 @@ obj-$(CONFIG_SAMSUNG_DEV_BACKLIGHT) += dev-backlight.o
63 63
64# DMA support 64# DMA support
65 65
66obj-$(CONFIG_S3C_DMA) += dma.o 66obj-$(CONFIG_S3C_DMA) += dma.o s3c-dma-ops.o
67 67
68obj-$(CONFIG_S3C_PL330_DMA) += s3c-pl330.o 68obj-$(CONFIG_SAMSUNG_DMADEV) += dma-ops.o
69
70obj-$(CONFIG_S3C_PL330_DMA) += s3c-pl330.o s3c-dma-ops.o
69 71
70# PM support 72# PM support
71 73
diff --git a/arch/arm/plat-samsung/dma-ops.c b/arch/arm/plat-samsung/dma-ops.c
new file mode 100644
index 000000000000..6e3d9abc9e2e
--- /dev/null
+++ b/arch/arm/plat-samsung/dma-ops.c
@@ -0,0 +1,131 @@
1/* linux/arch/arm/plat-samsung/dma-ops.c
2 *
3 * Copyright (c) 2011 Samsung Electronics Co., Ltd.
4 * http://www.samsung.com
5 *
6 * Samsung DMA Operations
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12
13#include <linux/kernel.h>
14#include <linux/errno.h>
15#include <linux/amba/pl330.h>
16#include <linux/scatterlist.h>
17
18#include <mach/dma.h>
19
20static inline bool pl330_filter(struct dma_chan *chan, void *param)
21{
22 struct dma_pl330_peri *peri = chan->private;
23 return peri->peri_id == (unsigned)param;
24}
25
26static unsigned samsung_dmadev_request(enum dma_ch dma_ch,
27 struct samsung_dma_info *info)
28{
29 struct dma_chan *chan;
30 dma_cap_mask_t mask;
31 struct dma_slave_config slave_config;
32
33 dma_cap_zero(mask);
34 dma_cap_set(info->cap, mask);
35
36 chan = dma_request_channel(mask, pl330_filter, (void *)dma_ch);
37
38 if (info->direction == DMA_FROM_DEVICE) {
39 memset(&slave_config, 0, sizeof(struct dma_slave_config));
40 slave_config.direction = info->direction;
41 slave_config.src_addr = info->fifo;
42 slave_config.src_addr_width = info->width;
43 slave_config.src_maxburst = 1;
44 dmaengine_slave_config(chan, &slave_config);
45 } else if (info->direction == DMA_TO_DEVICE) {
46 memset(&slave_config, 0, sizeof(struct dma_slave_config));
47 slave_config.direction = info->direction;
48 slave_config.dst_addr = info->fifo;
49 slave_config.dst_addr_width = info->width;
50 slave_config.dst_maxburst = 1;
51 dmaengine_slave_config(chan, &slave_config);
52 }
53
54 return (unsigned)chan;
55}
56
57static int samsung_dmadev_release(unsigned ch,
58 struct s3c2410_dma_client *client)
59{
60 dma_release_channel((struct dma_chan *)ch);
61
62 return 0;
63}
64
65static int samsung_dmadev_prepare(unsigned ch,
66 struct samsung_dma_prep_info *info)
67{
68 struct scatterlist sg;
69 struct dma_chan *chan = (struct dma_chan *)ch;
70 struct dma_async_tx_descriptor *desc;
71
72 switch (info->cap) {
73 case DMA_SLAVE:
74 sg_init_table(&sg, 1);
75 sg_dma_len(&sg) = info->len;
76 sg_set_page(&sg, pfn_to_page(PFN_DOWN(info->buf)),
77 info->len, offset_in_page(info->buf));
78 sg_dma_address(&sg) = info->buf;
79
80 desc = chan->device->device_prep_slave_sg(chan,
81 &sg, 1, info->direction, DMA_PREP_INTERRUPT);
82 break;
83 case DMA_CYCLIC:
84 desc = chan->device->device_prep_dma_cyclic(chan,
85 info->buf, info->len, info->period, info->direction);
86 break;
87 default:
88 dev_err(&chan->dev->device, "unsupported format\n");
89 return -EFAULT;
90 }
91
92 if (!desc) {
93 dev_err(&chan->dev->device, "cannot prepare cyclic dma\n");
94 return -EFAULT;
95 }
96
97 desc->callback = info->fp;
98 desc->callback_param = info->fp_param;
99
100 dmaengine_submit((struct dma_async_tx_descriptor *)desc);
101
102 return 0;
103}
104
105static inline int samsung_dmadev_trigger(unsigned ch)
106{
107 dma_async_issue_pending((struct dma_chan *)ch);
108
109 return 0;
110}
111
112static inline int samsung_dmadev_flush(unsigned ch)
113{
114 return dmaengine_terminate_all((struct dma_chan *)ch);
115}
116
117struct samsung_dma_ops dmadev_ops = {
118 .request = samsung_dmadev_request,
119 .release = samsung_dmadev_release,
120 .prepare = samsung_dmadev_prepare,
121 .trigger = samsung_dmadev_trigger,
122 .started = NULL,
123 .flush = samsung_dmadev_flush,
124 .stop = samsung_dmadev_flush,
125};
126
127void *samsung_dmadev_get_ops(void)
128{
129 return &dmadev_ops;
130}
131EXPORT_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 000000000000..4c1a363526cf
--- /dev/null
+++ b/arch/arm/plat-samsung/include/plat/dma-ops.h
@@ -0,0 +1,63 @@
1/* arch/arm/plat-samsung/include/plat/dma-ops.h
2 *
3 * Copyright (c) 2011 Samsung Electronics Co., Ltd.
4 * http://www.samsung.com
5 *
6 * Samsung DMA support
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12
13#ifndef __SAMSUNG_DMA_OPS_H_
14#define __SAMSUNG_DMA_OPS_H_ __FILE__
15
16#include <linux/dmaengine.h>
17
18struct samsung_dma_prep_info {
19 enum dma_transaction_type cap;
20 enum dma_data_direction direction;
21 dma_addr_t buf;
22 unsigned long period;
23 unsigned long len;
24 void (*fp)(void *data);
25 void *fp_param;
26};
27
28struct samsung_dma_info {
29 enum dma_transaction_type cap;
30 enum dma_data_direction direction;
31 enum dma_slave_buswidth width;
32 dma_addr_t fifo;
33 struct s3c2410_dma_client *client;
34};
35
36struct samsung_dma_ops {
37 unsigned (*request)(enum dma_ch ch, struct samsung_dma_info *info);
38 int (*release)(unsigned ch, struct s3c2410_dma_client *client);
39 int (*prepare)(unsigned ch, struct samsung_dma_prep_info *info);
40 int (*trigger)(unsigned ch);
41 int (*started)(unsigned ch);
42 int (*flush)(unsigned ch);
43 int (*stop)(unsigned ch);
44};
45
46extern void *samsung_dmadev_get_ops(void);
47extern void *s3c_dma_get_ops(void);
48
49static inline void *__samsung_dma_get_ops(void)
50{
51 if (samsung_dma_is_dmadev())
52 return samsung_dmadev_get_ops();
53 else
54 return s3c_dma_get_ops();
55}
56
57/*
58 * samsung_dma_get_ops
59 * get the set of samsung dma operations
60 */
61#define samsung_dma_get_ops() __samsung_dma_get_ops()
62
63#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 0a5dade0e85c..2916920034f0 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)
93 return true; 93 return true;
94} 94}
95 95
96static inline bool samsung_dma_is_dmadev(void)
97{
98 return true;
99}
96#include <plat/dma.h> 100#include <plat/dma.h>
97 101
98#endif /* __DMA_PL330_H_ */ 102#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 8c273b7a6f56..361076060744 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);
126extern int s3c2410_dma_set_buffdone_fn(enum dma_ch, s3c2410_dma_cbfn_t rtn); 126extern int s3c2410_dma_set_buffdone_fn(enum dma_ch, s3c2410_dma_cbfn_t rtn);
127 127
128 128
129#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 000000000000..33ab3241268d
--- /dev/null
+++ b/arch/arm/plat-samsung/s3c-dma-ops.c
@@ -0,0 +1,133 @@
1/* linux/arch/arm/plat-samsung/s3c-dma-ops.c
2 *
3 * Copyright (c) 2011 Samsung Electronics Co., Ltd.
4 * http://www.samsung.com
5 *
6 * Samsung S3C-DMA Operations
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12
13#include <linux/kernel.h>
14#include <linux/errno.h>
15#include <linux/slab.h>
16#include <linux/types.h>
17
18#include <mach/dma.h>
19
20struct cb_data {
21 void (*fp) (void *);
22 void *fp_param;
23 unsigned ch;
24 struct list_head node;
25};
26
27static LIST_HEAD(dma_list);
28
29static void s3c_dma_cb(struct s3c2410_dma_chan *channel, void *param,
30 int size, enum s3c2410_dma_buffresult res)
31{
32 struct cb_data *data = param;
33
34 data->fp(data->fp_param);
35}
36
37static unsigned s3c_dma_request(enum dma_ch dma_ch,
38 struct samsung_dma_info *info)
39{
40 struct cb_data *data;
41
42 if (s3c2410_dma_request(dma_ch, info->client, NULL) < 0) {
43 s3c2410_dma_free(dma_ch, info->client);
44 return 0;
45 }
46
47 data = kzalloc(sizeof(struct cb_data), GFP_KERNEL);
48 data->ch = dma_ch;
49 list_add_tail(&data->node, &dma_list);
50
51 if (info->direction == DMA_FROM_DEVICE)
52 s3c2410_dma_devconfig(dma_ch, S3C2410_DMASRC_HW, info->fifo);
53 else
54 s3c2410_dma_devconfig(dma_ch, S3C2410_DMASRC_MEM, info->fifo);
55
56 if (info->cap == DMA_CYCLIC)
57 s3c2410_dma_setflags(dma_ch, S3C2410_DMAF_CIRCULAR);
58
59 s3c2410_dma_config(dma_ch, info->width);
60
61 return (unsigned)dma_ch;
62}
63
64static int s3c_dma_release(unsigned ch, struct s3c2410_dma_client *client)
65{
66 struct cb_data *data;
67
68 list_for_each_entry(data, &dma_list, node)
69 if (data->ch == ch)
70 break;
71 list_del(&data->node);
72
73 s3c2410_dma_free(ch, client);
74 kfree(data);
75
76 return 0;
77}
78
79static int s3c_dma_prepare(unsigned ch, struct samsung_dma_prep_info *info)
80{
81 struct cb_data *data;
82 int len = (info->cap == DMA_CYCLIC) ? info->period : info->len;
83
84 list_for_each_entry(data, &dma_list, node)
85 if (data->ch == ch)
86 break;
87
88 if (!data->fp) {
89 s3c2410_dma_set_buffdone_fn(ch, s3c_dma_cb);
90 data->fp = info->fp;
91 data->fp_param = info->fp_param;
92 }
93
94 s3c2410_dma_enqueue(ch, (void *)data, info->buf, len);
95
96 return 0;
97}
98
99static inline int s3c_dma_trigger(unsigned ch)
100{
101 return s3c2410_dma_ctrl(ch, S3C2410_DMAOP_START);
102}
103
104static inline int s3c_dma_started(unsigned ch)
105{
106 return s3c2410_dma_ctrl(ch, S3C2410_DMAOP_STARTED);
107}
108
109static inline int s3c_dma_flush(unsigned ch)
110{
111 return s3c2410_dma_ctrl(ch, S3C2410_DMAOP_FLUSH);
112}
113
114static inline int s3c_dma_stop(unsigned ch)
115{
116 return s3c2410_dma_ctrl(ch, S3C2410_DMAOP_STOP);
117}
118
119static struct samsung_dma_ops s3c_dma_ops = {
120 .request = s3c_dma_request,
121 .release = s3c_dma_release,
122 .prepare = s3c_dma_prepare,
123 .trigger = s3c_dma_trigger,
124 .started = s3c_dma_started,
125 .flush = s3c_dma_flush,
126 .stop = s3c_dma_stop,
127};
128
129void *s3c_dma_get_ops(void)
130{
131 return &s3c_dma_ops;
132}
133EXPORT_SYMBOL(s3c_dma_get_ops);
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-30 05:54:17 -0500