release/src-rt-6.x/linux/linux-2.6/arch/arm/mach-s3c2412/dma.c

   1 /* linux/arch/arm/mach-s3c2412/dma.c
   2  *
   3  * Copyright (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 #include <linux/serial_core.h>
  19
  20 #include <asm/dma.h>
  21 #include <asm/arch/dma.h>
  22 #include <asm/io.h>
  23
  24 #include <asm/plat-s3c24xx/dma.h>
  25 #include <asm/plat-s3c24xx/cpu.h>
  26
  27 #include <asm/arch/regs-serial.h>
  28 #include <asm/arch/regs-gpio.h>
  29 #include <asm/arch/regs-ac97.h>
  30 #include <asm/arch/regs-mem.h>
  31 #include <asm/arch/regs-lcd.h>
  32 #include <asm/arch/regs-sdi.h>
  33 #include <asm/arch/regs-iis.h>
  34 #include <asm/arch/regs-spi.h>
  35
  36 #define MAP(x) { (x)| DMA_CH_VALID, (x)| DMA_CH_VALID, (x)| DMA_CH_VALID, (x)| DMA_CH_VALID }
  37
  38 static struct s3c24xx_dma_map __initdata s3c2412_dma_mappings[] = {
  39         [DMACH_XD0] = {
  40                 .name           = "xdreq0",
  41                 .channels       = MAP(S3C2412_DMAREQSEL_XDREQ0),
  42         },
  43         [DMACH_XD1] = {
  44                 .name           = "xdreq1",
  45                 .channels       = MAP(S3C2412_DMAREQSEL_XDREQ1),
  46         },
  47         [DMACH_SDI] = {
  48                 .name           = "sdi",
  49                 .channels       = MAP(S3C2412_DMAREQSEL_SDI),
  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       = MAP(S3C2412_DMAREQSEL_SPI0TX),
  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       = MAP(S3C2412_DMAREQSEL_SPI1TX),
  62                 .hw_addr.to     = S3C2410_PA_SPI + S3C2412_SPI1 + S3C2410_SPTDAT,
  63                 .hw_addr.from   = S3C2410_PA_SPI + S3C2412_SPI1  + S3C2410_SPRDAT,
  64         },
  65         [DMACH_UART0] = {
  66                 .name           = "uart0",
  67                 .channels       = MAP(S3C2412_DMAREQSEL_UART0_0),
  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       = MAP(S3C2412_DMAREQSEL_UART1_0),
  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       = MAP(S3C2412_DMAREQSEL_UART2_0),
  80                 .hw_addr.to     = S3C2410_PA_UART2 + S3C2410_UTXH,
  81                 .hw_addr.from   = S3C2410_PA_UART2 + S3C2410_URXH,
  82         },
  83         [DMACH_UART0_SRC2] = {
  84                 .name           = "uart0",
  85                 .channels       = MAP(S3C2412_DMAREQSEL_UART0_1),
  86                 .hw_addr.to     = S3C2410_PA_UART0 + S3C2410_UTXH,
  87                 .hw_addr.from   = S3C2410_PA_UART0 + S3C2410_URXH,
  88         },
  89         [DMACH_UART1_SRC2] = {
  90                 .name           = "uart1",
  91                 .channels       = MAP(S3C2412_DMAREQSEL_UART1_1),
  92                 .hw_addr.to     = S3C2410_PA_UART1 + S3C2410_UTXH,
  93                 .hw_addr.from   = S3C2410_PA_UART1 + S3C2410_URXH,
  94         },
  95         [DMACH_UART2_SRC2] = {
  96                 .name           = "uart2",
  97                 .channels       = MAP(S3C2412_DMAREQSEL_UART2_1),
  98                 .hw_addr.to     = S3C2410_PA_UART2 + S3C2410_UTXH,
  99                 .hw_addr.from   = S3C2410_PA_UART2 + S3C2410_URXH,
 100         },
 101         [DMACH_TIMER] = {
 102                 .name           = "timer",
 103                 .channels       = MAP(S3C2412_DMAREQSEL_TIMER),
 104         },
 105         [DMACH_I2S_IN] = {
 106                 .name           = "i2s-sdi",
 107                 .channels       = MAP(S3C2412_DMAREQSEL_I2SRX),
 108                 .hw_addr.from   = S3C2410_PA_IIS + S3C2410_IISFIFO,
 109         },
 110         [DMACH_I2S_OUT] = {
 111                 .name           = "i2s-sdo",
 112                 .channels       = MAP(S3C2412_DMAREQSEL_I2STX),
 113                 .hw_addr.to     = S3C2410_PA_IIS + S3C2410_IISFIFO,
 114         },
 115         [DMACH_USB_EP1] = {
 116                 .name           = "usb-ep1",
 117                 .channels       = MAP(S3C2412_DMAREQSEL_USBEP1),
 118         },
 119         [DMACH_USB_EP2] = {
 120                 .name           = "usb-ep2",
 121                 .channels       = MAP(S3C2412_DMAREQSEL_USBEP2),
 122         },
 123         [DMACH_USB_EP3] = {
 124                 .name           = "usb-ep3",
 125                 .channels       = MAP(S3C2412_DMAREQSEL_USBEP3),
 126         },
 127         [DMACH_USB_EP4] = {
 128                 .name           = "usb-ep4",
 129                 .channels       = MAP(S3C2412_DMAREQSEL_USBEP4),
 130         },
 131 };
 132
 133 static void s3c2412_dma_select(struct s3c2410_dma_chan *chan,
 134                                struct s3c24xx_dma_map *map)
 135 {
 136         writel(map->channels[0] | S3C2412_DMAREQSEL_HW,
 137                chan->regs + S3C2412_DMA_DMAREQSEL);
 138 }
 139
 140 static struct s3c24xx_dma_selection __initdata s3c2412_dma_sel = {
 141         .select         = s3c2412_dma_select,
 142         .dcon_mask      = 0,
 143         .map            = s3c2412_dma_mappings,
 144         .map_size       = ARRAY_SIZE(s3c2412_dma_mappings),
 145 };
 146
 147 static int s3c2412_dma_add(struct sys_device *sysdev)
 148 {
 149         s3c2410_dma_init();
 150         return s3c24xx_dma_init_map(&s3c2412_dma_sel);
 151 }
 152
 153 static struct sysdev_driver s3c2412_dma_driver = {
 154         .add    = s3c2412_dma_add,
 155 };
 156
 157 static int __init s3c2412_dma_init(void)
 158 {
 159         return sysdev_driver_register(&s3c2412_sysclass, &s3c2412_dma_driver);
 160 }
 161
 162 arch_initcall(s3c2412_dma_init);