48413df88e20eacbbb1a19a84941b4ec9a798a5a
[linux-2.6.git] / arch / arm / mach-s3c2412 / dma.c
1 /* linux/arch/arm/mach-s3c2412/dma.c
2  *
3  * Copyright (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 #include <linux/serial_core.h>
19
20 #include <asm/dma.h>
21 #include <asm/arch/dma.h>
22 #include <asm/io.h>
23
24 #include <asm/plat-s3c24xx/dma.h>
25 #include <asm/plat-s3c24xx/cpu.h>
26
27 #include <asm/plat-s3c/regs-serial.h>
28 #include <asm/arch/regs-gpio.h>
29 #include <asm/arch/regs-ac97.h>
30 #include <asm/arch/regs-mem.h>
31 #include <asm/arch/regs-lcd.h>
32 #include <asm/arch/regs-sdi.h>
33 #include <asm/arch/regs-iis.h>
34 #include <asm/arch/regs-spi.h>
35
36 #define MAP(x) { (x)| DMA_CH_VALID, (x)| DMA_CH_VALID, (x)| DMA_CH_VALID, (x)| DMA_CH_VALID }
37
38 static struct s3c24xx_dma_map __initdata s3c2412_dma_mappings[] = {
39         [DMACH_XD0] = {
40                 .name           = "xdreq0",
41                 .channels       = MAP(S3C2412_DMAREQSEL_XDREQ0),
42         },
43         [DMACH_XD1] = {
44                 .name           = "xdreq1",
45                 .channels       = MAP(S3C2412_DMAREQSEL_XDREQ1),
46         },
47         [DMACH_SDI] = {
48                 .name           = "sdi",
49                 .channels       = MAP(S3C2412_DMAREQSEL_SDI),
50                 .hw_addr.to     = S3C2410_PA_IIS + S3C2410_IISFIFO,
51                 .hw_addr.from   = S3C2410_PA_IIS + S3C2410_IISFIFO,
52         },
53         [DMACH_SPI0] = {
54                 .name           = "spi0",
55                 .channels       = MAP(S3C2412_DMAREQSEL_SPI0TX),
56                 .hw_addr.to     = S3C2410_PA_SPI + S3C2410_SPTDAT,
57                 .hw_addr.from   = S3C2410_PA_SPI + S3C2410_SPRDAT,
58         },
59         [DMACH_SPI1] = {
60                 .name           = "spi1",
61                 .channels       = MAP(S3C2412_DMAREQSEL_SPI1TX),
62                 .hw_addr.to     = S3C2410_PA_SPI + S3C2412_SPI1 + S3C2410_SPTDAT,
63                 .hw_addr.from   = S3C2410_PA_SPI + S3C2412_SPI1  + S3C2410_SPRDAT,
64         },
65         [DMACH_UART0] = {
66                 .name           = "uart0",
67                 .channels       = MAP(S3C2412_DMAREQSEL_UART0_0),
68                 .hw_addr.to     = S3C2410_PA_UART0 + S3C2410_UTXH,
69                 .hw_addr.from   = S3C2410_PA_UART0 + S3C2410_URXH,
70         },
71         [DMACH_UART1] = {
72                 .name           = "uart1",
73                 .channels       = MAP(S3C2412_DMAREQSEL_UART1_0),
74                 .hw_addr.to     = S3C2410_PA_UART1 + S3C2410_UTXH,
75                 .hw_addr.from   = S3C2410_PA_UART1 + S3C2410_URXH,
76         },
77         [DMACH_UART2] = {
78                 .name           = "uart2",
79                 .channels       = MAP(S3C2412_DMAREQSEL_UART2_0),
80                 .hw_addr.to     = S3C2410_PA_UART2 + S3C2410_UTXH,
81                 .hw_addr.from   = S3C2410_PA_UART2 + S3C2410_URXH,
82         },
83         [DMACH_UART0_SRC2] = {
84                 .name           = "uart0",
85                 .channels       = MAP(S3C2412_DMAREQSEL_UART0_1),
86                 .hw_addr.to     = S3C2410_PA_UART0 + S3C2410_UTXH,
87                 .hw_addr.from   = S3C2410_PA_UART0 + S3C2410_URXH,
88         },
89         [DMACH_UART1_SRC2] = {
90                 .name           = "uart1",
91                 .channels       = MAP(S3C2412_DMAREQSEL_UART1_1),
92                 .hw_addr.to     = S3C2410_PA_UART1 + S3C2410_UTXH,
93                 .hw_addr.from   = S3C2410_PA_UART1 + S3C2410_URXH,
94         },
95         [DMACH_UART2_SRC2] = {
96                 .name           = "uart2",
97                 .channels       = MAP(S3C2412_DMAREQSEL_UART2_1),
98                 .hw_addr.to     = S3C2410_PA_UART2 + S3C2410_UTXH,
99                 .hw_addr.from   = S3C2410_PA_UART2 + S3C2410_URXH,
100         },
101         [DMACH_TIMER] = {
102                 .name           = "timer",
103                 .channels       = MAP(S3C2412_DMAREQSEL_TIMER),
104         },
105         [DMACH_I2S_IN] = {
106                 .name           = "i2s-sdi",
107                 .channels       = MAP(S3C2412_DMAREQSEL_I2SRX),
108                 .hw_addr.from   = S3C2410_PA_IIS + S3C2410_IISFIFO,
109         },
110         [DMACH_I2S_OUT] = {
111                 .name           = "i2s-sdo",
112                 .channels       = MAP(S3C2412_DMAREQSEL_I2STX),
113                 .hw_addr.to     = S3C2410_PA_IIS + S3C2410_IISFIFO,
114         },
115         [DMACH_USB_EP1] = {
116                 .name           = "usb-ep1",
117                 .channels       = MAP(S3C2412_DMAREQSEL_USBEP1),
118         },
119         [DMACH_USB_EP2] = {
120                 .name           = "usb-ep2",
121                 .channels       = MAP(S3C2412_DMAREQSEL_USBEP2),
122         },
123         [DMACH_USB_EP3] = {
124                 .name           = "usb-ep3",
125                 .channels       = MAP(S3C2412_DMAREQSEL_USBEP3),
126         },
127         [DMACH_USB_EP4] = {
128                 .name           = "usb-ep4",
129                 .channels       = MAP(S3C2412_DMAREQSEL_USBEP4),
130         },
131 };
132
133 static void s3c2412_dma_select(struct s3c2410_dma_chan *chan,
134                                struct s3c24xx_dma_map *map)
135 {
136         writel(map->channels[0] | S3C2412_DMAREQSEL_HW,
137                chan->regs + S3C2412_DMA_DMAREQSEL);
138 }
139
140 static struct s3c24xx_dma_selection __initdata s3c2412_dma_sel = {
141         .select         = s3c2412_dma_select,
142         .dcon_mask      = 0,
143         .map            = s3c2412_dma_mappings,
144         .map_size       = ARRAY_SIZE(s3c2412_dma_mappings),
145 };
146
147 static int s3c2412_dma_add(struct sys_device *sysdev)
148 {
149         s3c2410_dma_init();
150         return s3c24xx_dma_init_map(&s3c2412_dma_sel);
151 }
152
153 static struct sysdev_driver s3c2412_dma_driver = {
154         .add    = s3c2412_dma_add,
155 };
156
157 static int __init s3c2412_dma_init(void)
158 {
159         return sysdev_driver_register(&s3c2412_sysclass, &s3c2412_dma_driver);
160 }
161
162 arch_initcall(s3c2412_dma_init);