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   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 <asm/dma.h>
  21 #include <asm/arch/dma.h>
  22 #include <asm/plat-s3c24xx/dma.h>
  23
  24 #include <asm/plat-s3c24xx/cpu.h>
  25
  26 #include <asm/arch/regs-serial.h>
  27 #include <asm/arch/regs-gpio.h>
  28 #include <asm/arch/regs-ac97.h>
  29 #include <asm/arch/regs-mem.h>
  30 #include <asm/arch/regs-lcd.h>
  31 #include <asm/arch/regs-sdi.h>
  32 #include <asm/arch/regs-iis.h>
  33 #include <asm/arch/regs-spi.h>
  34
  35 static struct s3c24xx_dma_map __initdata s3c2440_dma_mappings[] = {
  36         [DMACH_XD0] = {
  37                 .name           = "xdreq0",
  38                 .channels[0]    = S3C2410_DCON_CH0_XDREQ0 | DMA_CH_VALID,
  39         },
  40         [DMACH_XD1] = {
  41                 .name           = "xdreq1",
  42                 .channels[1]    = S3C2410_DCON_CH1_XDREQ1 | DMA_CH_VALID,
  43         },
  44         [DMACH_SDI] = {
  45                 .name           = "sdi",
  46                 .channels[0]    = S3C2410_DCON_CH0_SDI | DMA_CH_VALID,
  47                 .channels[1]    = S3C2440_DCON_CH1_SDI | DMA_CH_VALID,
  48                 .channels[2]    = S3C2410_DCON_CH2_SDI | DMA_CH_VALID,
  49                 .channels[3]    = S3C2410_DCON_CH3_SDI | DMA_CH_VALID,
  50                 .hw_addr.to     = S3C2410_PA_IIS + S3C2410_IISFIFO,
  51                 .hw_addr.from   = S3C2410_PA_IIS + S3C2410_IISFIFO,
  52         },
  53         [DMACH_SPI0] = {
  54                 .name           = "spi0",
  55                 .channels[1]    = S3C2410_DCON_CH1_SPI | DMA_CH_VALID,
  56                 .hw_addr.to     = S3C2410_PA_SPI + S3C2410_SPTDAT,
  57                 .hw_addr.from   = S3C2410_PA_SPI + S3C2410_SPRDAT,
  58         },
  59         [DMACH_SPI1] = {
  60                 .name           = "spi1",
  61                 .channels[3]    = S3C2410_DCON_CH3_SPI | DMA_CH_VALID,
  62                 .hw_addr.to     = S3C2410_PA_SPI + 0x20 + S3C2410_SPTDAT,
  63                 .hw_addr.from   = S3C2410_PA_SPI + 0x20 + S3C2410_SPRDAT,
  64         },
  65         [DMACH_UART0] = {
  66                 .name           = "uart0",
  67                 .channels[0]    = S3C2410_DCON_CH0_UART0 | DMA_CH_VALID,
  68                 .hw_addr.to     = S3C2410_PA_UART0 + S3C2410_UTXH,
  69                 .hw_addr.from   = S3C2410_PA_UART0 + S3C2410_URXH,
  70         },
  71         [DMACH_UART1] = {
  72                 .name           = "uart1",
  73                 .channels[1]    = S3C2410_DCON_CH1_UART1 | DMA_CH_VALID,
  74                 .hw_addr.to     = S3C2410_PA_UART1 + S3C2410_UTXH,
  75                 .hw_addr.from   = S3C2410_PA_UART1 + S3C2410_URXH,
  76         },
  77         [DMACH_UART2] = {
  78                 .name           = "uart2",
  79                 .channels[3]    = S3C2410_DCON_CH3_UART2 | DMA_CH_VALID,
  80                 .hw_addr.to     = S3C2410_PA_UART2 + S3C2410_UTXH,
  81                 .hw_addr.from   = S3C2410_PA_UART2 + S3C2410_URXH,
  82         },
  83         [DMACH_TIMER] = {
  84                 .name           = "timer",
  85                 .channels[0]    = S3C2410_DCON_CH0_TIMER | DMA_CH_VALID,
  86                 .channels[2]    = S3C2410_DCON_CH2_TIMER | DMA_CH_VALID,
  87                 .channels[3]    = S3C2410_DCON_CH3_TIMER | DMA_CH_VALID,
  88         },
  89         [DMACH_I2S_IN] = {
  90                 .name           = "i2s-sdi",
  91                 .channels[1]    = S3C2410_DCON_CH1_I2SSDI | DMA_CH_VALID,
  92                 .channels[2]    = S3C2410_DCON_CH2_I2SSDI | DMA_CH_VALID,
  93                 .hw_addr.from   = S3C2410_PA_IIS + S3C2410_IISFIFO,
  94         },
  95         [DMACH_I2S_OUT] = {
  96                 .name           = "i2s-sdo",
  97                 .channels[0]    = S3C2440_DCON_CH0_I2SSDO | DMA_CH_VALID,
  98                 .channels[2]    = S3C2410_DCON_CH2_I2SSDO | DMA_CH_VALID,
  99                 .hw_addr.to     = S3C2410_PA_IIS + S3C2410_IISFIFO,
 100         },
 101         [DMACH_PCM_IN] = {
 102                 .name           = "pcm-in",
 103                 .channels[0]    = S3C2440_DCON_CH0_PCMIN | DMA_CH_VALID,
 104                 .channels[2]    = S3C2440_DCON_CH2_PCMIN | DMA_CH_VALID,
 105                 .hw_addr.from   = S3C2440_PA_AC97 + S3C_AC97_PCM_DATA,
 106         },
 107         [DMACH_PCM_OUT] = {
 108                 .name           = "pcm-out",
 109                 .channels[1]    = S3C2440_DCON_CH1_PCMOUT | DMA_CH_VALID,
 110                 .channels[3]    = S3C2440_DCON_CH3_PCMOUT | DMA_CH_VALID,
 111                 .hw_addr.to     = S3C2440_PA_AC97 + S3C_AC97_PCM_DATA,
 112         },
 113         [DMACH_MIC_IN] = {
 114                 .name           = "mic-in",
 115                 .channels[2]    = S3C2440_DCON_CH2_MICIN | DMA_CH_VALID,
 116                 .channels[3]    = S3C2440_DCON_CH3_MICIN | DMA_CH_VALID,
 117                 .hw_addr.from   = S3C2440_PA_AC97 + S3C_AC97_MIC_DATA,
 118         },
 119         [DMACH_USB_EP1] = {
 120                 .name           = "usb-ep1",
 121                 .channels[0]    = S3C2410_DCON_CH0_USBEP1 | DMA_CH_VALID,
 122         },
 123         [DMACH_USB_EP2] = {
 124                 .name           = "usb-ep2",
 125                 .channels[1]    = S3C2410_DCON_CH1_USBEP2 | DMA_CH_VALID,
 126         },
 127         [DMACH_USB_EP3] = {
 128                 .name           = "usb-ep3",
 129                 .channels[2]    = S3C2410_DCON_CH2_USBEP3 | DMA_CH_VALID,
 130         },
 131         [DMACH_USB_EP4] = {
 132                 .name           = "usb-ep4",
 133                 .channels[3]    = S3C2410_DCON_CH3_USBEP4 | DMA_CH_VALID,
 134         },
 135 };
 136
 137 static void s3c2440_dma_select(struct s3c2410_dma_chan *chan,
 138                                struct s3c24xx_dma_map *map)
 139 {
 140         chan->dcon = map->channels[chan->number] & ~DMA_CH_VALID;
 141 }
 142
 143 static struct s3c24xx_dma_selection __initdata s3c2440_dma_sel = {
 144         .select         = s3c2440_dma_select,
 145         .dcon_mask      = 7 << 24,
 146         .map            = s3c2440_dma_mappings,
 147         .map_size       = ARRAY_SIZE(s3c2440_dma_mappings),
 148 };
 149
 150 static struct s3c24xx_dma_order __initdata s3c2440_dma_order = {
 151         .channels       = {
 152                 [DMACH_SDI]     = {
 153                         .list   = {
 154                                 [0]     = 3 | DMA_CH_VALID,
 155                                 [1]     = 2 | DMA_CH_VALID,
 156                                 [2]     = 1 | DMA_CH_VALID,
 157                                 [3]     = 0 | DMA_CH_VALID,
 158                         },
 159                 },
 160                 [DMACH_I2S_IN]  = {
 161                         .list   = {
 162                                 [0]     = 1 | DMA_CH_VALID,
 163                                 [1]     = 2 | DMA_CH_VALID,
 164                         },
 165                 },
 166                 [DMACH_I2S_OUT] = {
 167                         .list   = {
 168                                 [0]     = 2 | DMA_CH_VALID,
 169                                 [1]     = 1 | DMA_CH_VALID,
 170                         },
 171                 },
 172                 [DMACH_PCM_IN] = {
 173                         .list   = {
 174                                 [0]     = 2 | DMA_CH_VALID,
 175                                 [1]     = 1 | DMA_CH_VALID,
 176                         },
 177                 },
 178                 [DMACH_PCM_OUT] = {
 179                         .list   = {
 180                                 [0]     = 1 | DMA_CH_VALID,
 181                                 [1]     = 3 | DMA_CH_VALID,
 182                         },
 183                 },
 184                 [DMACH_MIC_IN] = {
 185                         .list   = {
 186                                 [0]     = 3 | DMA_CH_VALID,
 187                                 [1]     = 2 | DMA_CH_VALID,
 188                         },
 189                 },
 190         },
 191 };
 192
 193 static int s3c2440_dma_add(struct sys_device *sysdev)
 194 {
 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
 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