[ARM] 3800/2: S3C2412: DMA channel mappings
[linux-2.6] / arch / arm / mach-s3c2410 / s3c2412-dma.c
1 /* linux/arch/arm/mach-s3c2410/s3c2412-dma.c
2  *
3  * (c) 2006 Simtec Electronics
4  *      Ben Dooks <ben@simtec.co.uk>
5  *
6  * S3C2412 DMA selection
7  *
8  * http://armlinux.simtec.co.uk/
9  *
10  * This program is free software; you can redistribute it and/or modify
11  * it under the terms of the GNU General Public License version 2 as
12  * published by the Free Software Foundation.
13 */
14
15 #include <linux/kernel.h>
16 #include <linux/init.h>
17 #include <linux/sysdev.h>
18
19 #include <asm/dma.h>
20 #include <asm/arch/dma.h>
21 #include <asm/io.h>
22
23 #include "dma.h"
24 #include "cpu.h"
25
26 #include <asm/arch/regs-serial.h>
27 #include <asm/arch/regs-gpio.h>
28 #include <asm/arch/regs-ac97.h>
29 #include <asm/arch/regs-mem.h>
30 #include <asm/arch/regs-lcd.h>
31 #include <asm/arch/regs-sdi.h>
32 #include <asm/arch/regs-iis.h>
33 #include <asm/arch/regs-spi.h>
34
35 #define MAP(x) { (x)| DMA_CH_VALID, (x)| DMA_CH_VALID, (x)| DMA_CH_VALID, (x)| DMA_CH_VALID }
36
37 static struct s3c24xx_dma_map __initdata s3c2412_dma_mappings[] = {
38         [DMACH_XD0] = {
39                 .name           = "xdreq0",
40                 .channels       = MAP(S3C2412_DMAREQSEL_XDREQ0),
41         },
42         [DMACH_XD1] = {
43                 .name           = "xdreq1",
44                 .channels       = MAP(S3C2412_DMAREQSEL_XDREQ1),
45         },
46         [DMACH_SDI] = {
47                 .name           = "sdi",
48                 .channels       = MAP(S3C2412_DMAREQSEL_SDI),
49                 .hw_addr.to     = S3C2410_PA_IIS + S3C2410_IISFIFO,
50                 .hw_addr.from   = S3C2410_PA_IIS + S3C2410_IISFIFO,
51         },
52         [DMACH_SPI0] = {
53                 .name           = "spi0",
54                 .channels       = MAP(S3C2412_DMAREQSEL_SPI0TX),
55                 .hw_addr.to     = S3C2410_PA_SPI + S3C2410_SPTDAT,
56                 .hw_addr.from   = S3C2410_PA_SPI + S3C2410_SPRDAT,
57         },
58         [DMACH_SPI1] = {
59                 .name           = "spi1",
60                 .channels       = MAP(S3C2412_DMAREQSEL_SPI1TX),
61                 .hw_addr.to     = S3C2410_PA_SPI + 0x20 + S3C2410_SPTDAT,
62                 .hw_addr.from   = S3C2410_PA_SPI + 0x20 + S3C2410_SPRDAT,
63         },
64         [DMACH_UART0] = {
65                 .name           = "uart0",
66                 .channels       = MAP(S3C2412_DMAREQSEL_UART0_0),
67                 .hw_addr.to     = S3C2410_PA_UART0 + S3C2410_UTXH,
68                 .hw_addr.from   = S3C2410_PA_UART0 + S3C2410_URXH,
69         },
70         [DMACH_UART1] = {
71                 .name           = "uart1",
72                 .channels       = MAP(S3C2412_DMAREQSEL_UART1_0),
73                 .hw_addr.to     = S3C2410_PA_UART1 + S3C2410_UTXH,
74                 .hw_addr.from   = S3C2410_PA_UART1 + S3C2410_URXH,
75         },
76         [DMACH_UART2] = {
77                 .name           = "uart2",
78                 .channels       = MAP(S3C2412_DMAREQSEL_UART2_0),
79                 .hw_addr.to     = S3C2410_PA_UART2 + S3C2410_UTXH,
80                 .hw_addr.from   = S3C2410_PA_UART2 + S3C2410_URXH,
81         },
82         [DMACH_UART0_SRC2] = {
83                 .name           = "uart0",
84                 .channels       = MAP(S3C2412_DMAREQSEL_UART0_1),
85                 .hw_addr.to     = S3C2410_PA_UART0 + S3C2410_UTXH,
86                 .hw_addr.from   = S3C2410_PA_UART0 + S3C2410_URXH,
87         },
88         [DMACH_UART1_SRC2] = {
89                 .name           = "uart1",
90                 .channels       = MAP(S3C2412_DMAREQSEL_UART1_1),
91                 .hw_addr.to     = S3C2410_PA_UART1 + S3C2410_UTXH,
92                 .hw_addr.from   = S3C2410_PA_UART1 + S3C2410_URXH,
93         },
94         [DMACH_UART2_SRC2] = {
95                 .name           = "uart2",
96                 .channels       = MAP(S3C2412_DMAREQSEL_UART2_1),
97                 .hw_addr.to     = S3C2410_PA_UART2 + S3C2410_UTXH,
98                 .hw_addr.from   = S3C2410_PA_UART2 + S3C2410_URXH,
99         },
100         [DMACH_TIMER] = {
101                 .name           = "timer",
102                 .channels       = MAP(S3C2412_DMAREQSEL_TIMER),
103         },
104         [DMACH_I2S_IN] = {
105                 .name           = "i2s-sdi",
106                 .channels       = MAP(S3C2412_DMAREQSEL_I2SRX),
107                 .hw_addr.from   = S3C2410_PA_IIS + S3C2410_IISFIFO,
108         },
109         [DMACH_I2S_OUT] = {
110                 .name           = "i2s-sdo",
111                 .channels       = MAP(S3C2412_DMAREQSEL_I2STX),
112                 .hw_addr.to     = S3C2410_PA_IIS + S3C2410_IISFIFO,
113         },
114         [DMACH_USB_EP1] = {
115                 .name           = "usb-ep1",
116                 .channels       = MAP(S3C2412_DMAREQSEL_USBEP1),
117         },
118         [DMACH_USB_EP2] = {
119                 .name           = "usb-ep2",
120                 .channels       = MAP(S3C2412_DMAREQSEL_USBEP2),
121         },
122         [DMACH_USB_EP3] = {
123                 .name           = "usb-ep3",
124                 .channels       = MAP(S3C2412_DMAREQSEL_USBEP3),
125         },
126         [DMACH_USB_EP4] = {
127                 .name           = "usb-ep4",
128                 .channels       = MAP(S3C2412_DMAREQSEL_USBEP4),
129         },
130 };
131
132 static void s3c2412_dma_select(struct s3c2410_dma_chan *chan,
133                                struct s3c24xx_dma_map *map)
134 {
135         writel(chan->regs + S3C2412_DMA_DMAREQSEL,
136                map->channels[0] | S3C2412_DMAREQSEL_HW);
137 }
138
139 static struct s3c24xx_dma_selection __initdata s3c2412_dma_sel = {
140         .select         = s3c2412_dma_select,
141         .dcon_mask      = 0,
142         .map            = s3c2412_dma_mappings,
143         .map_size       = ARRAY_SIZE(s3c2412_dma_mappings),
144 };
145
146 static int s3c2412_dma_add(struct sys_device *sysdev)
147 {
148         return s3c24xx_dma_init_map(&s3c2412_dma_sel);
149 }
150
151 static struct sysdev_driver s3c2412_dma_driver = {
152         .add    = s3c2412_dma_add,
153 };
154
155 static int __init s3c2412_dma_init(void)
156 {
157         return sysdev_driver_register(&s3c2412_sysclass, &s3c2412_dma_driver);
158 }
159
160 arch_initcall(s3c2412_dma_init);