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/plat-s3c/regs-serial.h>
  28 #include <asm/arch/regs-gpio.h>
  29 #include <asm/plat-s3c/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/plat-s3c24xx/regs-s3c2412-iis.h>
  34 #include <asm/plat-s3c24xx/regs-iis.h>
  35 #include <asm/plat-s3c24xx/regs-spi.h>
  36
  37 #define MAP(x) { (x)| DMA_CH_VALID, (x)| DMA_CH_VALID, (x)| DMA_CH_VALID, (x)| DMA_CH_VALID }
  38
  39 static struct s3c24xx_dma_map __initdata s3c2412_dma_mappings[] = {
  40         [DMACH_XD0] = {
  41                 .name           = "xdreq0",
  42                 .channels       = MAP(S3C2412_DMAREQSEL_XDREQ0),
  43         },
  44         [DMACH_XD1] = {
  45                 .name           = "xdreq1",
  46                 .channels       = MAP(S3C2412_DMAREQSEL_XDREQ1),
  47         },
  48         [DMACH_SDI] = {
  49                 .name           = "sdi",
  50                 .channels       = MAP(S3C2412_DMAREQSEL_SDI),
  51                 .hw_addr.to     = S3C2410_PA_SDI + S3C2410_SDIDATA,
  52                 .hw_addr.from   = S3C2410_PA_SDI + S3C2410_SDIDATA,
  53         },
  54         [DMACH_SPI0] = {
  55                 .name           = "spi0",
  56                 .channels       = MAP(S3C2412_DMAREQSEL_SPI0TX),
  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       = MAP(S3C2412_DMAREQSEL_SPI1TX),
  63                 .hw_addr.to     = S3C2410_PA_SPI + S3C2412_SPI1 + S3C2410_SPTDAT,
  64                 .hw_addr.from   = S3C2410_PA_SPI + S3C2412_SPI1  + S3C2410_SPRDAT,
  65         },
  66         [DMACH_UART0] = {
  67                 .name           = "uart0",
  68                 .channels       = MAP(S3C2412_DMAREQSEL_UART0_0),
  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       = MAP(S3C2412_DMAREQSEL_UART1_0),
  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       = MAP(S3C2412_DMAREQSEL_UART2_0),
  81                 .hw_addr.to     = S3C2410_PA_UART2 + S3C2410_UTXH,
  82                 .hw_addr.from   = S3C2410_PA_UART2 + S3C2410_URXH,
  83         },
  84         [DMACH_UART0_SRC2] = {
  85                 .name           = "uart0",
  86                 .channels       = MAP(S3C2412_DMAREQSEL_UART0_1),
  87                 .hw_addr.to     = S3C2410_PA_UART0 + S3C2410_UTXH,
  88                 .hw_addr.from   = S3C2410_PA_UART0 + S3C2410_URXH,
  89         },
  90         [DMACH_UART1_SRC2] = {
  91                 .name           = "uart1",
  92                 .channels       = MAP(S3C2412_DMAREQSEL_UART1_1),
  93                 .hw_addr.to     = S3C2410_PA_UART1 + S3C2410_UTXH,
  94                 .hw_addr.from   = S3C2410_PA_UART1 + S3C2410_URXH,
  95         },
  96         [DMACH_UART2_SRC2] = {
  97                 .name           = "uart2",
  98                 .channels       = MAP(S3C2412_DMAREQSEL_UART2_1),
  99                 .hw_addr.to     = S3C2410_PA_UART2 + S3C2410_UTXH,
 100                 .hw_addr.from   = S3C2410_PA_UART2 + S3C2410_URXH,
 101         },
 102         [DMACH_TIMER] = {
 103                 .name           = "timer",
 104                 .channels       = MAP(S3C2412_DMAREQSEL_TIMER),
 105         },
 106         [DMACH_I2S_IN] = {
 107                 .name           = "i2s-sdi",
 108                 .channels       = MAP(S3C2412_DMAREQSEL_I2SRX),
 109                 .hw_addr.from   = S3C2410_PA_IIS + S3C2412_IISRXD,
 110         },
 111         [DMACH_I2S_OUT] = {
 112                 .name           = "i2s-sdo",
 113                 .channels       = MAP(S3C2412_DMAREQSEL_I2STX),
 114                 .hw_addr.to     = S3C2410_PA_IIS + S3C2412_IISTXD,
 115         },
 116         [DMACH_USB_EP1] = {
 117                 .name           = "usb-ep1",
 118                 .channels       = MAP(S3C2412_DMAREQSEL_USBEP1),
 119         },
 120         [DMACH_USB_EP2] = {
 121                 .name           = "usb-ep2",
 122                 .channels       = MAP(S3C2412_DMAREQSEL_USBEP2),
 123         },
 124         [DMACH_USB_EP3] = {
 125                 .name           = "usb-ep3",
 126                 .channels       = MAP(S3C2412_DMAREQSEL_USBEP3),
 127         },
 128         [DMACH_USB_EP4] = {
 129                 .name           = "usb-ep4",
 130                 .channels       = MAP(S3C2412_DMAREQSEL_USBEP4),
 131         },
 132 };
 133
 134 static void s3c2412_dma_select(struct s3c2410_dma_chan *chan,
 135                                struct s3c24xx_dma_map *map)
 136 {
 137         writel(map->channels[0] | S3C2412_DMAREQSEL_HW,
 138                chan->regs + S3C2412_DMA_DMAREQSEL);
 139 }
 140
 141 static struct s3c24xx_dma_selection __initdata s3c2412_dma_sel = {
 142         .select         = s3c2412_dma_select,
 143         .dcon_mask      = 0,
 144         .map            = s3c2412_dma_mappings,
 145         .map_size       = ARRAY_SIZE(s3c2412_dma_mappings),
 146 };
 147
 148 static int __init s3c2412_dma_add(struct sys_device *sysdev)
 149 {
 150         s3c2410_dma_init();
 151         return s3c24xx_dma_init_map(&s3c2412_dma_sel);
 152 }
 153
 154 static struct sysdev_driver s3c2412_dma_driver = {
 155         .add    = s3c2412_dma_add,
 156 };
 157
 158 static int __init s3c2412_dma_init(void)
 159 {
 160         return sysdev_driver_register(&s3c2412_sysclass, &s3c2412_dma_driver);
 161 }
 162
 163 arch_initcall(s3c2412_dma_init);