arch/arm/mach-s3c2410/s3c2412-dma.c

   1 /* linux/arch/arm/mach-s3c2410/s3c2412-dma.c
   2  *
   3  * (c) 2006 Simtec Electronics
   4  *      Ben Dooks <ben@simtec.co.uk>
   5  *
   6  * S3C2412 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
  19 #include <asm/dma.h>
  20 #include <asm/arch/dma.h>
  21 #include <asm/io.h>
  22
  23 #include "dma.h"
  24 #include "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 #define MAP(x) { (x)| DMA_CH_VALID, (x)| DMA_CH_VALID, (x)| DMA_CH_VALID, (x)| DMA_CH_VALID }
  36
  37 static struct s3c24xx_dma_map __initdata s3c2412_dma_mappings[] = {
  38         [DMACH_XD0] = {
  39                 .name           = "xdreq0",
  40                 .channels       = MAP(S3C2412_DMAREQSEL_XDREQ0),
  41         },
  42         [DMACH_XD1] = {
  43                 .name           = "xdreq1",
  44                 .channels       = MAP(S3C2412_DMAREQSEL_XDREQ1),
  45         },
  46         [DMACH_SDI] = {
  47                 .name           = "sdi",
  48                 .channels       = MAP(S3C2412_DMAREQSEL_SDI),
  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       = MAP(S3C2412_DMAREQSEL_SPI0TX),
  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       = MAP(S3C2412_DMAREQSEL_SPI1TX),
  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       = MAP(S3C2412_DMAREQSEL_UART0_0),
  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       = MAP(S3C2412_DMAREQSEL_UART1_0),
  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       = MAP(S3C2412_DMAREQSEL_UART2_0),
  79                 .hw_addr.to     = S3C2410_PA_UART2 + S3C2410_UTXH,
  80                 .hw_addr.from   = S3C2410_PA_UART2 + S3C2410_URXH,
  81         },
  82         [DMACH_UART0_SRC2] = {
  83                 .name           = "uart0",
  84                 .channels       = MAP(S3C2412_DMAREQSEL_UART0_1),
  85                 .hw_addr.to     = S3C2410_PA_UART0 + S3C2410_UTXH,
  86                 .hw_addr.from   = S3C2410_PA_UART0 + S3C2410_URXH,
  87         },
  88         [DMACH_UART1_SRC2] = {
  89                 .name           = "uart1",
  90                 .channels       = MAP(S3C2412_DMAREQSEL_UART1_1),
  91                 .hw_addr.to     = S3C2410_PA_UART1 + S3C2410_UTXH,
  92                 .hw_addr.from   = S3C2410_PA_UART1 + S3C2410_URXH,
  93         },
  94         [DMACH_UART2_SRC2] = {
  95                 .name           = "uart2",
  96                 .channels       = MAP(S3C2412_DMAREQSEL_UART2_1),
  97                 .hw_addr.to     = S3C2410_PA_UART2 + S3C2410_UTXH,
  98                 .hw_addr.from   = S3C2410_PA_UART2 + S3C2410_URXH,
  99         },
 100         [DMACH_TIMER] = {
 101                 .name           = "timer",
 102                 .channels       = MAP(S3C2412_DMAREQSEL_TIMER),
 103         },
 104         [DMACH_I2S_IN] = {
 105                 .name           = "i2s-sdi",
 106                 .channels       = MAP(S3C2412_DMAREQSEL_I2SRX),
 107                 .hw_addr.from   = S3C2410_PA_IIS + S3C2410_IISFIFO,
 108         },
 109         [DMACH_I2S_OUT] = {
 110                 .name           = "i2s-sdo",
 111                 .channels       = MAP(S3C2412_DMAREQSEL_I2STX),
 112                 .hw_addr.to     = S3C2410_PA_IIS + S3C2410_IISFIFO,
 113         },
 114         [DMACH_USB_EP1] = {
 115                 .name           = "usb-ep1",
 116                 .channels       = MAP(S3C2412_DMAREQSEL_USBEP1),
 117         },
 118         [DMACH_USB_EP2] = {
 119                 .name           = "usb-ep2",
 120                 .channels       = MAP(S3C2412_DMAREQSEL_USBEP2),
 121         },
 122         [DMACH_USB_EP3] = {
 123                 .name           = "usb-ep3",
 124                 .channels       = MAP(S3C2412_DMAREQSEL_USBEP3),
 125         },
 126         [DMACH_USB_EP4] = {
 127                 .name           = "usb-ep4",
 128                 .channels       = MAP(S3C2412_DMAREQSEL_USBEP4),
 129         },
 130 };
 131
 132 static void s3c2412_dma_select(struct s3c2410_dma_chan *chan,
 133                                struct s3c24xx_dma_map *map)
 134 {
 135         writel(chan->regs + S3C2412_DMA_DMAREQSEL,
 136                map->channels[0] | S3C2412_DMAREQSEL_HW);
 137 }
 138
 139 static struct s3c24xx_dma_selection __initdata s3c2412_dma_sel = {
 140         .select         = s3c2412_dma_select,
 141         .dcon_mask      = 0,
 142         .map            = s3c2412_dma_mappings,
 143         .map_size       = ARRAY_SIZE(s3c2412_dma_mappings),
 144 };
 145
 146 static int s3c2412_dma_add(struct sys_device *sysdev)
 147 {
 148         return s3c24xx_dma_init_map(&s3c2412_dma_sel);
 149 }
 150
 151 static struct sysdev_driver s3c2412_dma_driver = {
 152         .add    = s3c2412_dma_add,
 153 };
 154
 155 static int __init s3c2412_dma_init(void)
 156 {
 157         return sysdev_driver_register(&s3c2412_sysclass, &s3c2412_dma_driver);
 158 }
 159
 160 arch_initcall(s3c2412_dma_init);