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   1 /* linux/arch/arm/mach-s3c2443/dma.c
   2  *
   3  * Copyright (c) 2007 Simtec Electronics
   4  *      Ben Dooks <ben@simtec.co.uk>
   5  *
   6  * S3C2443 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.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 <mach/regs-mem.h>
  30 #include <mach/regs-lcd.h>
  31 #include <mach/regs-sdi.h>
  32 #include <plat/regs-iis.h>
  33 #include <plat/regs-spi.h>
  34
  35 #define MAP(x) { \
  36                 [0]     = (x) | DMA_CH_VALID,   \
  37                 [1]     = (x) | DMA_CH_VALID,   \
  38                 [2]     = (x) | DMA_CH_VALID,   \
  39                 [3]     = (x) | DMA_CH_VALID,   \
  40                 [4]     = (x) | DMA_CH_VALID,   \
  41                 [5]     = (x) | DMA_CH_VALID,   \
  42         }
  43
  44 static struct s3c24xx_dma_map __initdata s3c2443_dma_mappings[] = {
  45         [DMACH_XD0] = {
  46                 .name           = "xdreq0",
  47                 .channels       = MAP(S3C2443_DMAREQSEL_XDREQ0),
  48         },
  49         [DMACH_XD1] = {
  50                 .name           = "xdreq1",
  51                 .channels       = MAP(S3C2443_DMAREQSEL_XDREQ1),
  52         },
  53         [DMACH_SDI] = {
  54                 .name           = "sdi",
  55                 .channels       = MAP(S3C2443_DMAREQSEL_SDI),
  56                 .hw_addr.to     = S3C2410_PA_IIS + S3C2410_IISFIFO,
  57                 .hw_addr.from   = S3C2410_PA_IIS + S3C2410_IISFIFO,
  58         },
  59         [DMACH_SPI0] = {
  60                 .name           = "spi0",
  61                 .channels       = MAP(S3C2443_DMAREQSEL_SPI0TX),
  62                 .hw_addr.to     = S3C2410_PA_SPI + S3C2410_SPTDAT,
  63                 .hw_addr.from   = S3C2410_PA_SPI + S3C2410_SPRDAT,
  64         },
  65         [DMACH_SPI1] = {
  66                 .name           = "spi1",
  67                 .channels       = MAP(S3C2443_DMAREQSEL_SPI1TX),
  68                 .hw_addr.to     = S3C2410_PA_SPI + 0x20 + S3C2410_SPTDAT,
  69                 .hw_addr.from   = S3C2410_PA_SPI + 0x20 + S3C2410_SPRDAT,
  70         },
  71         [DMACH_UART0] = {
  72                 .name           = "uart0",
  73                 .channels       = MAP(S3C2443_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(S3C2443_DMAREQSEL_UART1_0),
  80                 .hw_addr.to     = S3C2410_PA_UART1 + S3C2410_UTXH,
  81                 .hw_addr.from   = S3C2410_PA_UART1 + S3C2410_URXH,
  82         },
  83         [DMACH_UART2] = {
  84                 .name           = "uart2",
  85                 .channels       = MAP(S3C2443_DMAREQSEL_UART2_0),
  86                 .hw_addr.to     = S3C2410_PA_UART2 + S3C2410_UTXH,
  87                 .hw_addr.from   = S3C2410_PA_UART2 + S3C2410_URXH,
  88         },
  89         [DMACH_UART3] = {
  90                 .name           = "uart3",
  91                 .channels       = MAP(S3C2443_DMAREQSEL_UART3_0),
  92                 .hw_addr.to     = S3C2443_PA_UART3 + S3C2410_UTXH,
  93                 .hw_addr.from   = S3C2443_PA_UART3 + S3C2410_URXH,
  94         },
  95         [DMACH_UART0_SRC2] = {
  96                 .name           = "uart0",
  97                 .channels       = MAP(S3C2443_DMAREQSEL_UART0_1),
  98                 .hw_addr.to     = S3C2410_PA_UART0 + S3C2410_UTXH,
  99                 .hw_addr.from   = S3C2410_PA_UART0 + S3C2410_URXH,
 100         },
 101         [DMACH_UART1_SRC2] = {
 102                 .name           = "uart1",
 103                 .channels       = MAP(S3C2443_DMAREQSEL_UART1_1),
 104                 .hw_addr.to     = S3C2410_PA_UART1 + S3C2410_UTXH,
 105                 .hw_addr.from   = S3C2410_PA_UART1 + S3C2410_URXH,
 106         },
 107         [DMACH_UART2_SRC2] = {
 108                 .name           = "uart2",
 109                 .channels       = MAP(S3C2443_DMAREQSEL_UART2_1),
 110                 .hw_addr.to     = S3C2410_PA_UART2 + S3C2410_UTXH,
 111                 .hw_addr.from   = S3C2410_PA_UART2 + S3C2410_URXH,
 112         },
 113         [DMACH_UART3_SRC2] = {
 114                 .name           = "uart3",
 115                 .channels       = MAP(S3C2443_DMAREQSEL_UART3_1),
 116                 .hw_addr.to     = S3C2443_PA_UART3 + S3C2410_UTXH,
 117                 .hw_addr.from   = S3C2443_PA_UART3 + S3C2410_URXH,
 118         },
 119         [DMACH_TIMER] = {
 120                 .name           = "timer",
 121                 .channels       = MAP(S3C2443_DMAREQSEL_TIMER),
 122         },
 123         [DMACH_I2S_IN] = {
 124                 .name           = "i2s-sdi",
 125                 .channels       = MAP(S3C2443_DMAREQSEL_I2SRX),
 126                 .hw_addr.from   = S3C2410_PA_IIS + S3C2410_IISFIFO,
 127         },
 128         [DMACH_I2S_OUT] = {
 129                 .name           = "i2s-sdo",
 130                 .channels       = MAP(S3C2443_DMAREQSEL_I2STX),
 131                 .hw_addr.to     = S3C2410_PA_IIS + S3C2410_IISFIFO,
 132         },
 133         [DMACH_PCM_IN] = {
 134                 .name           = "pcm-in",
 135                 .channels       = MAP(S3C2443_DMAREQSEL_PCMIN),
 136                 .hw_addr.from   = S3C2440_PA_AC97 + S3C_AC97_PCM_DATA,
 137         },
 138         [DMACH_PCM_OUT] = {
 139                 .name           = "pcm-out",
 140                 .channels       = MAP(S3C2443_DMAREQSEL_PCMOUT),
 141                 .hw_addr.to     = S3C2440_PA_AC97 + S3C_AC97_PCM_DATA,
 142         },
 143         [DMACH_MIC_IN] = {
 144                 .name           = "mic-in",
 145                 .channels       = MAP(S3C2443_DMAREQSEL_MICIN),
 146                 .hw_addr.from   = S3C2440_PA_AC97 + S3C_AC97_MIC_DATA,
 147         },
 148 };
 149
 150 static void s3c2443_dma_select(struct s3c2410_dma_chan *chan,
 151                                struct s3c24xx_dma_map *map)
 152 {
 153         writel(map->channels[0] | S3C2443_DMAREQSEL_HW,
 154                chan->regs + S3C2443_DMA_DMAREQSEL);
 155 }
 156
 157 static struct s3c24xx_dma_selection __initdata s3c2443_dma_sel = {
 158         .select         = s3c2443_dma_select,
 159         .dcon_mask      = 0,
 160         .map            = s3c2443_dma_mappings,
 161         .map_size       = ARRAY_SIZE(s3c2443_dma_mappings),
 162 };
 163
 164 static int __init s3c2443_dma_add(struct sys_device *sysdev)
 165 {
 166         s3c24xx_dma_init(6, IRQ_S3C2443_DMA0, 0x100);
 167         return s3c24xx_dma_init_map(&s3c2443_dma_sel);
 168 }
 169
 170 static struct sysdev_driver s3c2443_dma_driver = {
 171         .add    = s3c2443_dma_add,
 172 };
 173
 174 static int __init s3c2443_dma_init(void)
 175 {
 176         return sysdev_driver_register(&s3c2443_sysclass, &s3c2443_dma_driver);
 177 }
 178
 179 arch_initcall(s3c2443_dma_init);