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a21765a7 | 1 | /* linux/arch/arm/mach-s3c2412/dma.c |
34348012 | 2 | * |
c16f7bd8 | 3 | * Copyright (c) 2006 Simtec Electronics |
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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> | |
b6d1f542 | 18 | #include <linux/serial_core.h> |
fced80c7 | 19 | #include <linux/io.h> |
34348012 | 20 | |
a09e64fb | 21 | #include <mach/dma.h> |
34348012 | 22 | |
992426bf | 23 | #include <plat/dma-s3c24xx.h> |
a2b7ba9c | 24 | #include <plat/cpu.h> |
34348012 | 25 | |
a2b7ba9c | 26 | #include <plat/regs-serial.h> |
a09e64fb | 27 | #include <mach/regs-gpio.h> |
f74c95c2 | 28 | #include <plat/regs-ac97.h> |
44dc9404 | 29 | #include <plat/regs-dma.h> |
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30 | #include <mach/regs-mem.h> |
31 | #include <mach/regs-lcd.h> | |
32 | #include <mach/regs-sdi.h> | |
8150bc88 | 33 | #include <plat/regs-iis.h> |
13622708 | 34 | #include <plat/regs-spi.h> |
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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), | |
c6709e8e | 42 | .channels_rx = MAP(S3C2412_DMAREQSEL_XDREQ0), |
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43 | }, |
44 | [DMACH_XD1] = { | |
45 | .name = "xdreq1", | |
46 | .channels = MAP(S3C2412_DMAREQSEL_XDREQ1), | |
c6709e8e | 47 | .channels_rx = MAP(S3C2412_DMAREQSEL_XDREQ1), |
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48 | }, |
49 | [DMACH_SDI] = { | |
50 | .name = "sdi", | |
51 | .channels = MAP(S3C2412_DMAREQSEL_SDI), | |
c6709e8e | 52 | .channels_rx = MAP(S3C2412_DMAREQSEL_SDI), |
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53 | }, |
54 | [DMACH_SPI0] = { | |
55 | .name = "spi0", | |
56 | .channels = MAP(S3C2412_DMAREQSEL_SPI0TX), | |
c6709e8e | 57 | .channels_rx = MAP(S3C2412_DMAREQSEL_SPI0RX), |
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58 | }, |
59 | [DMACH_SPI1] = { | |
60 | .name = "spi1", | |
61 | .channels = MAP(S3C2412_DMAREQSEL_SPI1TX), | |
c6709e8e | 62 | .channels_rx = MAP(S3C2412_DMAREQSEL_SPI1RX), |
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63 | }, |
64 | [DMACH_UART0] = { | |
65 | .name = "uart0", | |
66 | .channels = MAP(S3C2412_DMAREQSEL_UART0_0), | |
c6709e8e | 67 | .channels_rx = MAP(S3C2412_DMAREQSEL_UART0_0), |
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68 | }, |
69 | [DMACH_UART1] = { | |
70 | .name = "uart1", | |
71 | .channels = MAP(S3C2412_DMAREQSEL_UART1_0), | |
c6709e8e | 72 | .channels_rx = MAP(S3C2412_DMAREQSEL_UART1_0), |
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73 | }, |
74 | [DMACH_UART2] = { | |
75 | .name = "uart2", | |
76 | .channels = MAP(S3C2412_DMAREQSEL_UART2_0), | |
c6709e8e | 77 | .channels_rx = MAP(S3C2412_DMAREQSEL_UART2_0), |
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78 | }, |
79 | [DMACH_UART0_SRC2] = { | |
80 | .name = "uart0", | |
81 | .channels = MAP(S3C2412_DMAREQSEL_UART0_1), | |
c6709e8e | 82 | .channels_rx = MAP(S3C2412_DMAREQSEL_UART0_1), |
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83 | }, |
84 | [DMACH_UART1_SRC2] = { | |
85 | .name = "uart1", | |
86 | .channels = MAP(S3C2412_DMAREQSEL_UART1_1), | |
c6709e8e | 87 | .channels_rx = MAP(S3C2412_DMAREQSEL_UART1_1), |
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88 | }, |
89 | [DMACH_UART2_SRC2] = { | |
90 | .name = "uart2", | |
91 | .channels = MAP(S3C2412_DMAREQSEL_UART2_1), | |
c6709e8e | 92 | .channels_rx = MAP(S3C2412_DMAREQSEL_UART2_1), |
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93 | }, |
94 | [DMACH_TIMER] = { | |
95 | .name = "timer", | |
96 | .channels = MAP(S3C2412_DMAREQSEL_TIMER), | |
c6709e8e | 97 | .channels_rx = MAP(S3C2412_DMAREQSEL_TIMER), |
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98 | }, |
99 | [DMACH_I2S_IN] = { | |
100 | .name = "i2s-sdi", | |
101 | .channels = MAP(S3C2412_DMAREQSEL_I2SRX), | |
c6709e8e | 102 | .channels_rx = MAP(S3C2412_DMAREQSEL_I2SRX), |
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103 | }, |
104 | [DMACH_I2S_OUT] = { | |
105 | .name = "i2s-sdo", | |
106 | .channels = MAP(S3C2412_DMAREQSEL_I2STX), | |
c6709e8e | 107 | .channels_rx = MAP(S3C2412_DMAREQSEL_I2STX), |
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108 | }, |
109 | [DMACH_USB_EP1] = { | |
110 | .name = "usb-ep1", | |
111 | .channels = MAP(S3C2412_DMAREQSEL_USBEP1), | |
c6709e8e | 112 | .channels_rx = MAP(S3C2412_DMAREQSEL_USBEP1), |
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113 | }, |
114 | [DMACH_USB_EP2] = { | |
115 | .name = "usb-ep2", | |
116 | .channels = MAP(S3C2412_DMAREQSEL_USBEP2), | |
c6709e8e | 117 | .channels_rx = MAP(S3C2412_DMAREQSEL_USBEP2), |
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118 | }, |
119 | [DMACH_USB_EP3] = { | |
120 | .name = "usb-ep3", | |
121 | .channels = MAP(S3C2412_DMAREQSEL_USBEP3), | |
c6709e8e | 122 | .channels_rx = MAP(S3C2412_DMAREQSEL_USBEP3), |
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123 | }, |
124 | [DMACH_USB_EP4] = { | |
125 | .name = "usb-ep4", | |
126 | .channels = MAP(S3C2412_DMAREQSEL_USBEP4), | |
c6709e8e | 127 | .channels_rx = MAP(S3C2412_DMAREQSEL_USBEP4), |
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128 | }, |
129 | }; | |
130 | ||
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131 | static void s3c2412_dma_direction(struct s3c2410_dma_chan *chan, |
132 | struct s3c24xx_dma_map *map, | |
133 | enum s3c2410_dmasrc dir) | |
134 | { | |
135 | unsigned long chsel; | |
136 | ||
137 | if (dir == S3C2410_DMASRC_HW) | |
138 | chsel = map->channels_rx[0]; | |
139 | else | |
140 | chsel = map->channels[0]; | |
141 | ||
142 | chsel &= ~DMA_CH_VALID; | |
143 | chsel |= S3C2412_DMAREQSEL_HW; | |
144 | ||
145 | writel(chsel, chan->regs + S3C2412_DMA_DMAREQSEL); | |
146 | } | |
147 | ||
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148 | static void s3c2412_dma_select(struct s3c2410_dma_chan *chan, |
149 | struct s3c24xx_dma_map *map) | |
150 | { | |
c6709e8e | 151 | s3c2412_dma_direction(chan, map, chan->source); |
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152 | } |
153 | ||
154 | static struct s3c24xx_dma_selection __initdata s3c2412_dma_sel = { | |
155 | .select = s3c2412_dma_select, | |
c6709e8e | 156 | .direction = s3c2412_dma_direction, |
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157 | .dcon_mask = 0, |
158 | .map = s3c2412_dma_mappings, | |
159 | .map_size = ARRAY_SIZE(s3c2412_dma_mappings), | |
160 | }; | |
161 | ||
f2c10d6c | 162 | static int __init s3c2412_dma_add(struct sys_device *sysdev) |
34348012 | 163 | { |
48adbcf3 | 164 | s3c2410_dma_init(); |
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165 | return s3c24xx_dma_init_map(&s3c2412_dma_sel); |
166 | } | |
167 | ||
168 | static struct sysdev_driver s3c2412_dma_driver = { | |
169 | .add = s3c2412_dma_add, | |
170 | }; | |
171 | ||
172 | static int __init s3c2412_dma_init(void) | |
173 | { | |
174 | return sysdev_driver_register(&s3c2412_sysclass, &s3c2412_dma_driver); | |
175 | } | |
176 | ||
177 | arch_initcall(s3c2412_dma_init); |