Root/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#include <linux/io.h>
20
21#include <mach/dma.h>
22
23#include <plat/dma-s3c24xx.h>
24#include <plat/cpu.h>
25
26#include <plat/regs-serial.h>
27#include <mach/regs-gpio.h>
28#include <plat/regs-ac97.h>
29#include <plat/regs-dma.h>
30#include <mach/regs-mem.h>
31#include <mach/regs-lcd.h>
32#include <mach/regs-sdi.h>
33#include <plat/regs-iis.h>
34#include <plat/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
38static struct s3c24xx_dma_map __initdata s3c2412_dma_mappings[] = {
39    [DMACH_XD0] = {
40        .name = "xdreq0",
41        .channels = MAP(S3C2412_DMAREQSEL_XDREQ0),
42        .channels_rx = MAP(S3C2412_DMAREQSEL_XDREQ0),
43    },
44    [DMACH_XD1] = {
45        .name = "xdreq1",
46        .channels = MAP(S3C2412_DMAREQSEL_XDREQ1),
47        .channels_rx = MAP(S3C2412_DMAREQSEL_XDREQ1),
48    },
49    [DMACH_SDI] = {
50        .name = "sdi",
51        .channels = MAP(S3C2412_DMAREQSEL_SDI),
52        .channels_rx = MAP(S3C2412_DMAREQSEL_SDI),
53        .hw_addr.to = S3C2410_PA_SDI + S3C2410_SDIDATA,
54        .hw_addr.from = S3C2410_PA_SDI + S3C2410_SDIDATA,
55    },
56    [DMACH_SPI0] = {
57        .name = "spi0",
58        .channels = MAP(S3C2412_DMAREQSEL_SPI0TX),
59        .channels_rx = MAP(S3C2412_DMAREQSEL_SPI0RX),
60        .hw_addr.to = S3C2410_PA_SPI + S3C2410_SPTDAT,
61        .hw_addr.from = S3C2410_PA_SPI + S3C2410_SPRDAT,
62    },
63    [DMACH_SPI1] = {
64        .name = "spi1",
65        .channels = MAP(S3C2412_DMAREQSEL_SPI1TX),
66        .channels_rx = MAP(S3C2412_DMAREQSEL_SPI1RX),
67        .hw_addr.to = S3C2410_PA_SPI + S3C2412_SPI1 + S3C2410_SPTDAT,
68        .hw_addr.from = S3C2410_PA_SPI + S3C2412_SPI1 + S3C2410_SPRDAT,
69    },
70    [DMACH_UART0] = {
71        .name = "uart0",
72        .channels = MAP(S3C2412_DMAREQSEL_UART0_0),
73        .channels_rx = MAP(S3C2412_DMAREQSEL_UART0_0),
74        .hw_addr.to = S3C2410_PA_UART0 + S3C2410_UTXH,
75        .hw_addr.from = S3C2410_PA_UART0 + S3C2410_URXH,
76    },
77    [DMACH_UART1] = {
78        .name = "uart1",
79        .channels = MAP(S3C2412_DMAREQSEL_UART1_0),
80        .channels_rx = MAP(S3C2412_DMAREQSEL_UART1_0),
81        .hw_addr.to = S3C2410_PA_UART1 + S3C2410_UTXH,
82        .hw_addr.from = S3C2410_PA_UART1 + S3C2410_URXH,
83    },
84          [DMACH_UART2] = {
85        .name = "uart2",
86        .channels = MAP(S3C2412_DMAREQSEL_UART2_0),
87        .channels_rx = MAP(S3C2412_DMAREQSEL_UART2_0),
88        .hw_addr.to = S3C2410_PA_UART2 + S3C2410_UTXH,
89        .hw_addr.from = S3C2410_PA_UART2 + S3C2410_URXH,
90    },
91    [DMACH_UART0_SRC2] = {
92        .name = "uart0",
93        .channels = MAP(S3C2412_DMAREQSEL_UART0_1),
94        .channels_rx = MAP(S3C2412_DMAREQSEL_UART0_1),
95        .hw_addr.to = S3C2410_PA_UART0 + S3C2410_UTXH,
96        .hw_addr.from = S3C2410_PA_UART0 + S3C2410_URXH,
97    },
98    [DMACH_UART1_SRC2] = {
99        .name = "uart1",
100        .channels = MAP(S3C2412_DMAREQSEL_UART1_1),
101        .channels_rx = MAP(S3C2412_DMAREQSEL_UART1_1),
102        .hw_addr.to = S3C2410_PA_UART1 + S3C2410_UTXH,
103        .hw_addr.from = S3C2410_PA_UART1 + S3C2410_URXH,
104    },
105          [DMACH_UART2_SRC2] = {
106        .name = "uart2",
107        .channels = MAP(S3C2412_DMAREQSEL_UART2_1),
108        .channels_rx = MAP(S3C2412_DMAREQSEL_UART2_1),
109        .hw_addr.to = S3C2410_PA_UART2 + S3C2410_UTXH,
110        .hw_addr.from = S3C2410_PA_UART2 + S3C2410_URXH,
111    },
112    [DMACH_TIMER] = {
113        .name = "timer",
114        .channels = MAP(S3C2412_DMAREQSEL_TIMER),
115        .channels_rx = MAP(S3C2412_DMAREQSEL_TIMER),
116    },
117    [DMACH_I2S_IN] = {
118        .name = "i2s-sdi",
119        .channels = MAP(S3C2412_DMAREQSEL_I2SRX),
120        .channels_rx = MAP(S3C2412_DMAREQSEL_I2SRX),
121    },
122    [DMACH_I2S_OUT] = {
123        .name = "i2s-sdo",
124        .channels = MAP(S3C2412_DMAREQSEL_I2STX),
125        .channels_rx = MAP(S3C2412_DMAREQSEL_I2STX),
126    },
127    [DMACH_USB_EP1] = {
128        .name = "usb-ep1",
129        .channels = MAP(S3C2412_DMAREQSEL_USBEP1),
130        .channels_rx = MAP(S3C2412_DMAREQSEL_USBEP1),
131    },
132    [DMACH_USB_EP2] = {
133        .name = "usb-ep2",
134        .channels = MAP(S3C2412_DMAREQSEL_USBEP2),
135        .channels_rx = MAP(S3C2412_DMAREQSEL_USBEP2),
136    },
137    [DMACH_USB_EP3] = {
138        .name = "usb-ep3",
139        .channels = MAP(S3C2412_DMAREQSEL_USBEP3),
140        .channels_rx = MAP(S3C2412_DMAREQSEL_USBEP3),
141    },
142    [DMACH_USB_EP4] = {
143        .name = "usb-ep4",
144        .channels = MAP(S3C2412_DMAREQSEL_USBEP4),
145        .channels_rx = MAP(S3C2412_DMAREQSEL_USBEP4),
146    },
147};
148
149static void s3c2412_dma_direction(struct s3c2410_dma_chan *chan,
150                  struct s3c24xx_dma_map *map,
151                  enum s3c2410_dmasrc dir)
152{
153    unsigned long chsel;
154
155    if (dir == S3C2410_DMASRC_HW)
156        chsel = map->channels_rx[0];
157    else
158        chsel = map->channels[0];
159
160    chsel &= ~DMA_CH_VALID;
161    chsel |= S3C2412_DMAREQSEL_HW;
162
163    writel(chsel, chan->regs + S3C2412_DMA_DMAREQSEL);
164}
165
166static void s3c2412_dma_select(struct s3c2410_dma_chan *chan,
167                   struct s3c24xx_dma_map *map)
168{
169    s3c2412_dma_direction(chan, map, chan->source);
170}
171
172static struct s3c24xx_dma_selection __initdata s3c2412_dma_sel = {
173    .select = s3c2412_dma_select,
174    .direction = s3c2412_dma_direction,
175    .dcon_mask = 0,
176    .map = s3c2412_dma_mappings,
177    .map_size = ARRAY_SIZE(s3c2412_dma_mappings),
178};
179
180static int __init s3c2412_dma_add(struct sys_device *sysdev)
181{
182    s3c2410_dma_init();
183    return s3c24xx_dma_init_map(&s3c2412_dma_sel);
184}
185
186static struct sysdev_driver s3c2412_dma_driver = {
187    .add = s3c2412_dma_add,
188};
189
190static int __init s3c2412_dma_init(void)
191{
192    return sysdev_driver_register(&s3c2412_sysclass, &s3c2412_dma_driver);
193}
194
195arch_initcall(s3c2412_dma_init);
196

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