arch/arm/mach-s3c2440/dma.c

   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/map.h>
  21 #include <mach/dma.h>
  22
  23 #include <plat/dma-plat.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 static struct s3c24xx_dma_map __initdata s3c2440_dma_mappings[] = {
  37         [DMACH_XD0] = {
  38                 .name           = "xdreq0",
  39                 .channels[0]    = S3C2410_DCON_CH0_XDREQ0 | DMA_CH_VALID,
  40         },
  41         [DMACH_XD1] = {
  42                 .name           = "xdreq1",
  43                 .channels[1]    = S3C2410_DCON_CH1_XDREQ1 | DMA_CH_VALID,
  44         },
  45         [DMACH_SDI] = {
  46                 .name           = "sdi",
  47                 .channels[0]    = S3C2410_DCON_CH0_SDI | DMA_CH_VALID,
  48                 .channels[1]    = S3C2440_DCON_CH1_SDI | DMA_CH_VALID,
  49                 .channels[2]    = S3C2410_DCON_CH2_SDI | DMA_CH_VALID,
  50                 .channels[3]    = S3C2410_DCON_CH3_SDI | DMA_CH_VALID,
  51                 .hw_addr.to     = S3C2410_PA_IIS + S3C2410_IISFIFO,
  52                 .hw_addr.from   = S3C2410_PA_IIS + S3C2410_IISFIFO,
  53         },
  54         [DMACH_SPI0] = {
  55                 .name           = "spi0",
  56                 .channels[1]    = S3C2410_DCON_CH1_SPI | DMA_CH_VALID,
  57                 .hw_addr.to     = S3C2410_PA_SPI + S3C2410_SPTDAT,
  58                 .hw_addr.from   = S3C2410_PA_SPI + S3C2410_SPRDAT,
  59         },
  60         [DMACH_SPI1] = {
  61                 .name           = "spi1",
  62                 .channels[3]    = S3C2410_DCON_CH3_SPI | DMA_CH_VALID,
  63                 .hw_addr.to     = S3C2410_PA_SPI + 0x20 + S3C2410_SPTDAT,
  64                 .hw_addr.from   = S3C2410_PA_SPI + 0x20 + S3C2410_SPRDAT,
  65         },
  66         [DMACH_UART0] = {
  67                 .name           = "uart0",
  68                 .channels[0]    = S3C2410_DCON_CH0_UART0 | DMA_CH_VALID,
  69                 .hw_addr.to     = S3C2410_PA_UART0 + S3C2410_UTXH,
  70                 .hw_addr.from   = S3C2410_PA_UART0 + S3C2410_URXH,
  71         },
  72         [DMACH_UART1] = {
  73                 .name           = "uart1",
  74                 .channels[1]    = S3C2410_DCON_CH1_UART1 | DMA_CH_VALID,
  75                 .hw_addr.to     = S3C2410_PA_UART1 + S3C2410_UTXH,
  76                 .hw_addr.from   = S3C2410_PA_UART1 + S3C2410_URXH,
  77         },
  78         [DMACH_UART2] = {
  79                 .name           = "uart2",
  80                 .channels[3]    = S3C2410_DCON_CH3_UART2 | DMA_CH_VALID,
  81                 .hw_addr.to     = S3C2410_PA_UART2 + S3C2410_UTXH,
  82                 .hw_addr.from   = S3C2410_PA_UART2 + S3C2410_URXH,
  83         },
  84         [DMACH_TIMER] = {
  85                 .name           = "timer",
  86                 .channels[0]    = S3C2410_DCON_CH0_TIMER | DMA_CH_VALID,
  87                 .channels[2]    = S3C2410_DCON_CH2_TIMER | DMA_CH_VALID,
  88                 .channels[3]    = S3C2410_DCON_CH3_TIMER | DMA_CH_VALID,
  89         },
  90         [DMACH_I2S_IN] = {
  91                 .name           = "i2s-sdi",
  92                 .channels[1]    = S3C2410_DCON_CH1_I2SSDI | DMA_CH_VALID,
  93                 .channels[2]    = S3C2410_DCON_CH2_I2SSDI | DMA_CH_VALID,
  94                 .hw_addr.from   = S3C2410_PA_IIS + S3C2410_IISFIFO,
  95         },
  96         [DMACH_I2S_OUT] = {
  97                 .name           = "i2s-sdo",
  98                 .channels[0]    = S3C2440_DCON_CH0_I2SSDO | DMA_CH_VALID,
  99                 .channels[2]    = S3C2410_DCON_CH2_I2SSDO | DMA_CH_VALID,
 100                 .hw_addr.to     = S3C2410_PA_IIS + S3C2410_IISFIFO,
 101         },
 102         [DMACH_PCM_IN] = {
 103                 .name           = "pcm-in",
 104                 .channels[0]    = S3C2440_DCON_CH0_PCMIN | DMA_CH_VALID,
 105                 .channels[2]    = S3C2440_DCON_CH2_PCMIN | DMA_CH_VALID,
 106                 .hw_addr.from   = S3C2440_PA_AC97 + S3C_AC97_PCM_DATA,
 107         },
 108         [DMACH_PCM_OUT] = {
 109                 .name           = "pcm-out",
 110                 .channels[1]    = S3C2440_DCON_CH1_PCMOUT | DMA_CH_VALID,
 111                 .channels[3]    = S3C2440_DCON_CH3_PCMOUT | DMA_CH_VALID,
 112                 .hw_addr.to     = S3C2440_PA_AC97 + S3C_AC97_PCM_DATA,
 113         },
 114         [DMACH_MIC_IN] = {
 115                 .name           = "mic-in",
 116                 .channels[2]    = S3C2440_DCON_CH2_MICIN | DMA_CH_VALID,
 117                 .channels[3]    = S3C2440_DCON_CH3_MICIN | DMA_CH_VALID,
 118                 .hw_addr.from   = S3C2440_PA_AC97 + S3C_AC97_MIC_DATA,
 119         },
 120         [DMACH_USB_EP1] = {
 121                 .name           = "usb-ep1",
 122                 .channels[0]    = S3C2410_DCON_CH0_USBEP1 | DMA_CH_VALID,
 123         },
 124         [DMACH_USB_EP2] = {
 125                 .name           = "usb-ep2",
 126                 .channels[1]    = S3C2410_DCON_CH1_USBEP2 | DMA_CH_VALID,
 127         },
 128         [DMACH_USB_EP3] = {
 129                 .name           = "usb-ep3",
 130                 .channels[2]    = S3C2410_DCON_CH2_USBEP3 | DMA_CH_VALID,
 131         },
 132         [DMACH_USB_EP4] = {
 133                 .name           = "usb-ep4",
 134                 .channels[3]    = S3C2410_DCON_CH3_USBEP4 | DMA_CH_VALID,
 135         },
 136 };
 137
 138 static void s3c2440_dma_select(struct s3c2410_dma_chan *chan,
 139                                struct s3c24xx_dma_map *map)
 140 {
 141         chan->dcon = map->channels[chan->number] & ~DMA_CH_VALID;
 142 }
 143
 144 static struct s3c24xx_dma_selection __initdata s3c2440_dma_sel = {
 145         .select         = s3c2440_dma_select,
 146         .dcon_mask      = 7 << 24,
 147         .map            = s3c2440_dma_mappings,
 148         .map_size       = ARRAY_SIZE(s3c2440_dma_mappings),
 149 };
 150
 151 static struct s3c24xx_dma_order __initdata s3c2440_dma_order = {
 152         .channels       = {
 153                 [DMACH_SDI]     = {
 154                         .list   = {
 155                                 [0]     = 3 | DMA_CH_VALID,
 156                                 [1]     = 2 | DMA_CH_VALID,
 157                                 [2]     = 1 | DMA_CH_VALID,
 158                                 [3]     = 0 | DMA_CH_VALID,
 159                         },
 160                 },
 161                 [DMACH_I2S_IN]  = {
 162                         .list   = {
 163                                 [0]     = 1 | DMA_CH_VALID,
 164                                 [1]     = 2 | DMA_CH_VALID,
 165                         },
 166                 },
 167                 [DMACH_I2S_OUT] = {
 168                         .list   = {
 169                                 [0]     = 2 | DMA_CH_VALID,
 170                                 [1]     = 1 | DMA_CH_VALID,
 171                         },
 172                 },
 173                 [DMACH_PCM_IN] = {
 174                         .list   = {
 175                                 [0]     = 2 | DMA_CH_VALID,
 176                                 [1]     = 1 | DMA_CH_VALID,
 177                         },
 178                 },
 179                 [DMACH_PCM_OUT] = {
 180                         .list   = {
 181                                 [0]     = 1 | DMA_CH_VALID,
 182                                 [1]     = 3 | DMA_CH_VALID,
 183                         },
 184                 },
 185                 [DMACH_MIC_IN] = {
 186                         .list   = {
 187                                 [0]     = 3 | DMA_CH_VALID,
 188                                 [1]     = 2 | DMA_CH_VALID,
 189                         },
 190                 },
 191         },
 192 };
 193
 194 static int __init s3c2440_dma_add(struct sys_device *sysdev)
 195 {
 196         s3c2410_dma_init();
 197         s3c24xx_dma_order_set(&s3c2440_dma_order);
 198         return s3c24xx_dma_init_map(&s3c2440_dma_sel);
 199 }
 200
 201 static struct sysdev_driver s3c2440_dma_driver = {
 202         .add    = s3c2440_dma_add,
 203 };
 204
 205 static int __init s3c2440_dma_init(void)
 206 {
 207         return sysdev_driver_register(&s3c2440_sysclass, &s3c2440_dma_driver);
 208 }
 209
 210 arch_initcall(s3c2440_dma_init);
 211