1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
|
/* linux/arch/arm/mach-s3c2412/dma.c
*
* Copyright (c) 2006 Simtec Electronics
* Ben Dooks <ben@simtec.co.uk>
*
* S3C2412 DMA selection
*
* http://armlinux.simtec.co.uk/
*
* 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/init.h>
#include <linux/device.h>
#include <linux/serial_core.h>
#include <linux/io.h>
#include <mach/dma.h>
#include <plat/dma-s3c24xx.h>
#include <plat/cpu.h>
#include <plat/regs-serial.h>
#include <mach/regs-gpio.h>
#include <plat/regs-ac97.h>
#include <plat/regs-dma.h>
#include <mach/regs-mem.h>
#include <mach/regs-lcd.h>
#include <mach/regs-sdi.h>
#include <plat/regs-iis.h>
#include <plat/regs-spi.h>
#define MAP(x) { (x)| DMA_CH_VALID, (x)| DMA_CH_VALID, (x)| DMA_CH_VALID, (x)| DMA_CH_VALID }
static struct s3c24xx_dma_map __initdata s3c2412_dma_mappings[] = {
[DMACH_XD0] = {
.name = "xdreq0",
.channels = MAP(S3C2412_DMAREQSEL_XDREQ0),
.channels_rx = MAP(S3C2412_DMAREQSEL_XDREQ0),
},
[DMACH_XD1] = {
.name = "xdreq1",
.channels = MAP(S3C2412_DMAREQSEL_XDREQ1),
.channels_rx = MAP(S3C2412_DMAREQSEL_XDREQ1),
},
[DMACH_SDI] = {
.name = "sdi",
.channels = MAP(S3C2412_DMAREQSEL_SDI),
.channels_rx = MAP(S3C2412_DMAREQSEL_SDI),
},
[DMACH_SPI0] = {
.name = "spi0",
.channels = MAP(S3C2412_DMAREQSEL_SPI0TX),
.channels_rx = MAP(S3C2412_DMAREQSEL_SPI0RX),
},
[DMACH_SPI1] = {
.name = "spi1",
.channels = MAP(S3C2412_DMAREQSEL_SPI1TX),
.channels_rx = MAP(S3C2412_DMAREQSEL_SPI1RX),
},
[DMACH_UART0] = {
.name = "uart0",
.channels = MAP(S3C2412_DMAREQSEL_UART0_0),
.channels_rx = MAP(S3C2412_DMAREQSEL_UART0_0),
},
[DMACH_UART1] = {
.name = "uart1",
.channels = MAP(S3C2412_DMAREQSEL_UART1_0),
.channels_rx = MAP(S3C2412_DMAREQSEL_UART1_0),
},
[DMACH_UART2] = {
.name = "uart2",
.channels = MAP(S3C2412_DMAREQSEL_UART2_0),
.channels_rx = MAP(S3C2412_DMAREQSEL_UART2_0),
},
[DMACH_UART0_SRC2] = {
.name = "uart0",
.channels = MAP(S3C2412_DMAREQSEL_UART0_1),
.channels_rx = MAP(S3C2412_DMAREQSEL_UART0_1),
},
[DMACH_UART1_SRC2] = {
.name = "uart1",
.channels = MAP(S3C2412_DMAREQSEL_UART1_1),
.channels_rx = MAP(S3C2412_DMAREQSEL_UART1_1),
},
[DMACH_UART2_SRC2] = {
.name = "uart2",
.channels = MAP(S3C2412_DMAREQSEL_UART2_1),
.channels_rx = MAP(S3C2412_DMAREQSEL_UART2_1),
},
[DMACH_TIMER] = {
.name = "timer",
.channels = MAP(S3C2412_DMAREQSEL_TIMER),
.channels_rx = MAP(S3C2412_DMAREQSEL_TIMER),
},
[DMACH_I2S_IN] = {
.name = "i2s-sdi",
.channels = MAP(S3C2412_DMAREQSEL_I2SRX),
.channels_rx = MAP(S3C2412_DMAREQSEL_I2SRX),
},
[DMACH_I2S_OUT] = {
.name = "i2s-sdo",
.channels = MAP(S3C2412_DMAREQSEL_I2STX),
.channels_rx = MAP(S3C2412_DMAREQSEL_I2STX),
},
[DMACH_USB_EP1] = {
.name = "usb-ep1",
.channels = MAP(S3C2412_DMAREQSEL_USBEP1),
.channels_rx = MAP(S3C2412_DMAREQSEL_USBEP1),
},
[DMACH_USB_EP2] = {
.name = "usb-ep2",
.channels = MAP(S3C2412_DMAREQSEL_USBEP2),
.channels_rx = MAP(S3C2412_DMAREQSEL_USBEP2),
},
[DMACH_USB_EP3] = {
.name = "usb-ep3",
.channels = MAP(S3C2412_DMAREQSEL_USBEP3),
.channels_rx = MAP(S3C2412_DMAREQSEL_USBEP3),
},
[DMACH_USB_EP4] = {
.name = "usb-ep4",
.channels = MAP(S3C2412_DMAREQSEL_USBEP4),
.channels_rx = MAP(S3C2412_DMAREQSEL_USBEP4),
},
};
static void s3c2412_dma_direction(struct s3c2410_dma_chan *chan,
struct s3c24xx_dma_map *map,
enum dma_data_direction dir)
{
unsigned long chsel;
if (dir == DMA_FROM_DEVICE)
chsel = map->channels_rx[0];
else
chsel = map->channels[0];
chsel &= ~DMA_CH_VALID;
chsel |= S3C2412_DMAREQSEL_HW;
writel(chsel, chan->regs + S3C2412_DMA_DMAREQSEL);
}
static void s3c2412_dma_select(struct s3c2410_dma_chan *chan,
struct s3c24xx_dma_map *map)
{
s3c2412_dma_direction(chan, map, chan->source);
}
static struct s3c24xx_dma_selection __initdata s3c2412_dma_sel = {
.select = s3c2412_dma_select,
.direction = s3c2412_dma_direction,
.dcon_mask = 0,
.map = s3c2412_dma_mappings,
.map_size = ARRAY_SIZE(s3c2412_dma_mappings),
};
static int __init s3c2412_dma_add(struct device *dev)
{
s3c2410_dma_init();
return s3c24xx_dma_init_map(&s3c2412_dma_sel);
}
static struct subsys_interface s3c2412_dma_interface = {
.name = "s3c2412_dma",
.subsys = &s3c2412_subsys,
.add_dev = s3c2412_dma_add,
};
static int __init s3c2412_dma_init(void)
{
return subsys_interface_register(&s3c2412_dma_interface);
}
arch_initcall(s3c2412_dma_init);
|
