1 /* linux/arch/arm/mach-s3c2440/dma.c
2 *
3 * Copyright (c) 2006 Simtec Electronics
4 * Ben Dooks <ben@simtec.co.uk>
5 *
6 * S3C2440 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 <mach/dma.h>
21
22 #include <plat/dma.h>
23 #include <plat/cpu.h>
24
25 #include <plat/regs-serial.h>
26 #include <mach/regs-gpio.h>
27 #include <plat/regs-ac97.h>
28 #include <mach/regs-mem.h>
29 #include <mach/regs-lcd.h>
30 #include <mach/regs-sdi.h>
31 #include <asm/plat-s3c24xx/regs-iis.h>
32 #include <plat/regs-spi.h>
33
34 static struct s3c24xx_dma_map __initdata s3c2440_dma_mappings[] = {
35 [DMACH_XD0] = {
36 .name = "xdreq0",
37 .channels[0] = S3C2410_DCON_CH0_XDREQ0 | DMA_CH_VALID,
38 },
39 [DMACH_XD1] = {
40 .name = "xdreq1",
41 .channels[1] = S3C2410_DCON_CH1_XDREQ1 | DMA_CH_VALID,
42 },
43 [DMACH_SDI] = {
44 .name = "sdi",
45 .channels[0] = S3C2410_DCON_CH0_SDI | DMA_CH_VALID,
46 .channels[1] = S3C2440_DCON_CH1_SDI | DMA_CH_VALID,
47 .channels[2] = S3C2410_DCON_CH2_SDI | DMA_CH_VALID,
48 .channels[3] = S3C2410_DCON_CH3_SDI | DMA_CH_VALID,
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[1] = S3C2410_DCON_CH1_SPI | DMA_CH_VALID,
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[3] = S3C2410_DCON_CH3_SPI | DMA_CH_VALID,
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[0] = S3C2410_DCON_CH0_UART0 | DMA_CH_VALID,
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[1] = S3C2410_DCON_CH1_UART1 | DMA_CH_VALID,
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[3] = S3C2410_DCON_CH3_UART2 | DMA_CH_VALID,
79 .hw_addr.to = S3C2410_PA_UART2 + S3C2410_UTXH,
80 .hw_addr.from = S3C2410_PA_UART2 + S3C2410_URXH,
81 },
82 [DMACH_TIMER] = {
83 .name = "timer",
84 .channels[0] = S3C2410_DCON_CH0_TIMER | DMA_CH_VALID,
85 .channels[2] = S3C2410_DCON_CH2_TIMER | DMA_CH_VALID,
86 .channels[3] = S3C2410_DCON_CH3_TIMER | DMA_CH_VALID,
87 },
88 [DMACH_I2S_IN] = {
89 .name = "i2s-sdi",
90 .channels[1] = S3C2410_DCON_CH1_I2SSDI | DMA_CH_VALID,
91 .channels[2] = S3C2410_DCON_CH2_I2SSDI | DMA_CH_VALID,
92 .hw_addr.from = S3C2410_PA_IIS + S3C2410_IISFIFO,
93 },
94 [DMACH_I2S_OUT] = {
95 .name = "i2s-sdo",
96 .channels[0] = S3C2440_DCON_CH0_I2SSDO | DMA_CH_VALID,
97 .channels[2] = S3C2410_DCON_CH2_I2SSDO | DMA_CH_VALID,
98 .hw_addr.to = S3C2410_PA_IIS + S3C2410_IISFIFO,
99 },
100 [DMACH_PCM_IN] = {
101 .name = "pcm-in",
102 .channels[0] = S3C2440_DCON_CH0_PCMIN | DMA_CH_VALID,
103 .channels[2] = S3C2440_DCON_CH2_PCMIN | DMA_CH_VALID,
104 .hw_addr.from = S3C2440_PA_AC97 + S3C_AC97_PCM_DATA,
105 },
106 [DMACH_PCM_OUT] = {
107 .name = "pcm-out",
108 .channels[1] = S3C2440_DCON_CH1_PCMOUT | DMA_CH_VALID,
109 .channels[3] = S3C2440_DCON_CH3_PCMOUT | DMA_CH_VALID,
110 .hw_addr.to = S3C2440_PA_AC97 + S3C_AC97_PCM_DATA,
111 },
112 [DMACH_MIC_IN] = {
113 .name = "mic-in",
114 .channels[2] = S3C2440_DCON_CH2_MICIN | DMA_CH_VALID,
115 .channels[3] = S3C2440_DCON_CH3_MICIN | DMA_CH_VALID,
116 .hw_addr.from = S3C2440_PA_AC97 + S3C_AC97_MIC_DATA,
117 },
118 [DMACH_USB_EP1] = {
119 .name = "usb-ep1",
120 .channels[0] = S3C2410_DCON_CH0_USBEP1 | DMA_CH_VALID,
121 },
122 [DMACH_USB_EP2] = {
123 .name = "usb-ep2",
124 .channels[1] = S3C2410_DCON_CH1_USBEP2 | DMA_CH_VALID,
125 },
126 [DMACH_USB_EP3] = {
127 .name = "usb-ep3",
128 .channels[2] = S3C2410_DCON_CH2_USBEP3 | DMA_CH_VALID,
129 },
130 [DMACH_USB_EP4] = {
131 .name = "usb-ep4",
132 .channels[3] = S3C2410_DCON_CH3_USBEP4 | DMA_CH_VALID,
133 },
134 };
135
s3c2440_dma_select(struct s3c2410_dma_chan * chan,struct s3c24xx_dma_map * map)136 static void s3c2440_dma_select(struct s3c2410_dma_chan *chan,
137 struct s3c24xx_dma_map *map)
138 {
139 chan->dcon = map->channels[chan->number] & ~DMA_CH_VALID;
140 }
141
142 static struct s3c24xx_dma_selection __initdata s3c2440_dma_sel = {
143 .select = s3c2440_dma_select,
144 .dcon_mask = 7 << 24,
145 .map = s3c2440_dma_mappings,
146 .map_size = ARRAY_SIZE(s3c2440_dma_mappings),
147 };
148
149 static struct s3c24xx_dma_order __initdata s3c2440_dma_order = {
150 .channels = {
151 [DMACH_SDI] = {
152 .list = {
153 [0] = 3 | DMA_CH_VALID,
154 [1] = 2 | DMA_CH_VALID,
155 [2] = 1 | DMA_CH_VALID,
156 [3] = 0 | DMA_CH_VALID,
157 },
158 },
159 [DMACH_I2S_IN] = {
160 .list = {
161 [0] = 1 | DMA_CH_VALID,
162 [1] = 2 | DMA_CH_VALID,
163 },
164 },
165 [DMACH_I2S_OUT] = {
166 .list = {
167 [0] = 2 | DMA_CH_VALID,
168 [1] = 1 | DMA_CH_VALID,
169 },
170 },
171 [DMACH_PCM_IN] = {
172 .list = {
173 [0] = 2 | DMA_CH_VALID,
174 [1] = 1 | DMA_CH_VALID,
175 },
176 },
177 [DMACH_PCM_OUT] = {
178 .list = {
179 [0] = 1 | DMA_CH_VALID,
180 [1] = 3 | DMA_CH_VALID,
181 },
182 },
183 [DMACH_MIC_IN] = {
184 .list = {
185 [0] = 3 | DMA_CH_VALID,
186 [1] = 2 | DMA_CH_VALID,
187 },
188 },
189 },
190 };
191
s3c2440_dma_add(struct sys_device * sysdev)192 static int __init s3c2440_dma_add(struct sys_device *sysdev)
193 {
194 s3c2410_dma_init();
195 s3c24xx_dma_order_set(&s3c2440_dma_order);
196 return s3c24xx_dma_init_map(&s3c2440_dma_sel);
197 }
198
199 static struct sysdev_driver s3c2440_dma_driver = {
200 .add = s3c2440_dma_add,
201 };
202
s3c2440_dma_init(void)203 static int __init s3c2440_dma_init(void)
204 {
205 return sysdev_driver_register(&s3c2440_sysclass, &s3c2440_dma_driver);
206 }
207
208 arch_initcall(s3c2440_dma_init);
209
210