release/src-rt-6.x.4708/linux/linux-2.6.36/arch/arm/mach-s3c2443/dma.c

   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-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) { \
  37                 [0]     = (x) | DMA_CH_VALID,   \
  38                 [1]     = (x) | DMA_CH_VALID,   \
  39                 [2]     = (x) | DMA_CH_VALID,   \
  40                 [3]     = (x) | DMA_CH_VALID,   \
  41                 [4]     = (x) | DMA_CH_VALID,   \
  42                 [5]     = (x) | DMA_CH_VALID,   \
  43         }
  44
  45 static struct s3c24xx_dma_map __initdata s3c2443_dma_mappings[] = {
  46         [DMACH_XD0] = {
  47                 .name           = "xdreq0",
  48                 .channels       = MAP(S3C2443_DMAREQSEL_XDREQ0),
  49         },
  50         [DMACH_XD1] = {
  51                 .name           = "xdreq1",
  52                 .channels       = MAP(S3C2443_DMAREQSEL_XDREQ1),
  53         },
  54         [DMACH_SDI] = {
  55                 .name           = "sdi",
  56                 .channels       = MAP(S3C2443_DMAREQSEL_SDI),
  57                 .hw_addr.to     = S3C2410_PA_IIS + S3C2410_IISFIFO,
  58                 .hw_addr.from   = S3C2410_PA_IIS + S3C2410_IISFIFO,
  59         },
  60         [DMACH_SPI0] = {
  61                 .name           = "spi0",
  62                 .channels       = MAP(S3C2443_DMAREQSEL_SPI0TX),
  63                 .hw_addr.to     = S3C2410_PA_SPI + S3C2410_SPTDAT,
  64                 .hw_addr.from   = S3C2410_PA_SPI + S3C2410_SPRDAT,
  65         },
  66         [DMACH_SPI1] = {
  67                 .name           = "spi1",
  68                 .channels       = MAP(S3C2443_DMAREQSEL_SPI1TX),
  69                 .hw_addr.to     = S3C2410_PA_SPI + 0x20 + S3C2410_SPTDAT,
  70                 .hw_addr.from   = S3C2410_PA_SPI + 0x20 + S3C2410_SPRDAT,
  71         },
  72         [DMACH_UART0] = {
  73                 .name           = "uart0",
  74                 .channels       = MAP(S3C2443_DMAREQSEL_UART0_0),
  75                 .hw_addr.to     = S3C2410_PA_UART0 + S3C2410_UTXH,
  76                 .hw_addr.from   = S3C2410_PA_UART0 + S3C2410_URXH,
  77         },
  78         [DMACH_UART1] = {
  79                 .name           = "uart1",
  80                 .channels       = MAP(S3C2443_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(S3C2443_DMAREQSEL_UART2_0),
  87                 .hw_addr.to     = S3C2410_PA_UART2 + S3C2410_UTXH,
  88                 .hw_addr.from   = S3C2410_PA_UART2 + S3C2410_URXH,
  89         },
  90         [DMACH_UART3] = {
  91                 .name           = "uart3",
  92                 .channels       = MAP(S3C2443_DMAREQSEL_UART3_0),
  93                 .hw_addr.to     = S3C2443_PA_UART3 + S3C2410_UTXH,
  94                 .hw_addr.from   = S3C2443_PA_UART3 + S3C2410_URXH,
  95         },
  96         [DMACH_UART0_SRC2] = {
  97                 .name           = "uart0",
  98                 .channels       = MAP(S3C2443_DMAREQSEL_UART0_1),
  99                 .hw_addr.to     = S3C2410_PA_UART0 + S3C2410_UTXH,
 100                 .hw_addr.from   = S3C2410_PA_UART0 + S3C2410_URXH,
 101         },
 102         [DMACH_UART1_SRC2] = {
 103                 .name           = "uart1",
 104                 .channels       = MAP(S3C2443_DMAREQSEL_UART1_1),
 105                 .hw_addr.to     = S3C2410_PA_UART1 + S3C2410_UTXH,
 106                 .hw_addr.from   = S3C2410_PA_UART1 + S3C2410_URXH,
 107         },
 108         [DMACH_UART2_SRC2] = {
 109                 .name           = "uart2",
 110                 .channels       = MAP(S3C2443_DMAREQSEL_UART2_1),
 111                 .hw_addr.to     = S3C2410_PA_UART2 + S3C2410_UTXH,
 112                 .hw_addr.from   = S3C2410_PA_UART2 + S3C2410_URXH,
 113         },
 114         [DMACH_UART3_SRC2] = {
 115                 .name           = "uart3",
 116                 .channels       = MAP(S3C2443_DMAREQSEL_UART3_1),
 117                 .hw_addr.to     = S3C2443_PA_UART3 + S3C2410_UTXH,
 118                 .hw_addr.from   = S3C2443_PA_UART3 + S3C2410_URXH,
 119         },
 120         [DMACH_TIMER] = {
 121                 .name           = "timer",
 122                 .channels       = MAP(S3C2443_DMAREQSEL_TIMER),
 123         },
 124         [DMACH_I2S_IN] = {
 125                 .name           = "i2s-sdi",
 126                 .channels       = MAP(S3C2443_DMAREQSEL_I2SRX),
 127                 .hw_addr.from   = S3C2410_PA_IIS + S3C2410_IISFIFO,
 128         },
 129         [DMACH_I2S_OUT] = {
 130                 .name           = "i2s-sdo",
 131                 .channels       = MAP(S3C2443_DMAREQSEL_I2STX),
 132                 .hw_addr.to     = S3C2410_PA_IIS + S3C2410_IISFIFO,
 133         },
 134         [DMACH_PCM_IN] = {
 135                 .name           = "pcm-in",
 136                 .channels       = MAP(S3C2443_DMAREQSEL_PCMIN),
 137                 .hw_addr.from   = S3C2440_PA_AC97 + S3C_AC97_PCM_DATA,
 138         },
 139         [DMACH_PCM_OUT] = {
 140                 .name           = "pcm-out",
 141                 .channels       = MAP(S3C2443_DMAREQSEL_PCMOUT),
 142                 .hw_addr.to     = S3C2440_PA_AC97 + S3C_AC97_PCM_DATA,
 143         },
 144         [DMACH_MIC_IN] = {
 145                 .name           = "mic-in",
 146                 .channels       = MAP(S3C2443_DMAREQSEL_MICIN),
 147                 .hw_addr.from   = S3C2440_PA_AC97 + S3C_AC97_MIC_DATA,
 148         },
 149 };
 150
 151 static void s3c2443_dma_select(struct s3c2410_dma_chan *chan,
 152                                struct s3c24xx_dma_map *map)
 153 {
 154         writel(map->channels[0] | S3C2443_DMAREQSEL_HW,
 155                chan->regs + S3C2443_DMA_DMAREQSEL);
 156 }
 157
 158 static struct s3c24xx_dma_selection __initdata s3c2443_dma_sel = {
 159         .select         = s3c2443_dma_select,
 160         .dcon_mask      = 0,
 161         .map            = s3c2443_dma_mappings,
 162         .map_size       = ARRAY_SIZE(s3c2443_dma_mappings),
 163 };
 164
 165 static int __init s3c2443_dma_add(struct sys_device *sysdev)
 166 {
 167         s3c24xx_dma_init(6, IRQ_S3C2443_DMA0, 0x100);
 168         return s3c24xx_dma_init_map(&s3c2443_dma_sel);
 169 }
 170
 171 static struct sysdev_driver s3c2443_dma_driver = {
 172         .add    = s3c2443_dma_add,
 173 };
 174
 175 static int __init s3c2443_dma_init(void)
 176 {
 177         return sysdev_driver_register(&s3c2443_sysclass, &s3c2443_dma_driver);
 178 }
 179
 180 arch_initcall(s3c2443_dma_init);