release/src-rt-6.x/linux/linux-2.6/arch/arm/mach-s3c2410/dma.c

   1 /* linux/arch/arm/mach-s3c2410/dma.c
   2  *
   3  * Copyright (c) 2006 Simtec Electronics
   4  *      Ben Dooks <ben@simtec.co.uk>
   5  *
   6  * S3C2410 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
  23 #include <asm/plat-s3c24xx/cpu.h>
  24 #include <asm/plat-s3c24xx/dma.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 s3c2410_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[2]    = S3C2410_DCON_CH2_SDI | DMA_CH_VALID,
  48                 .channels[3]    = S3C2410_DCON_CH3_SDI | DMA_CH_VALID,
  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[1]    = S3C2410_DCON_CH1_SPI | DMA_CH_VALID,
  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[3]    = S3C2410_DCON_CH3_SPI | DMA_CH_VALID,
  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[0]    = S3C2410_DCON_CH0_UART0 | DMA_CH_VALID,
  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[1]    = S3C2410_DCON_CH1_UART1 | DMA_CH_VALID,
  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[3]    = S3C2410_DCON_CH3_UART2 | DMA_CH_VALID,
  79                 .hw_addr.to     = S3C2410_PA_UART2 + S3C2410_UTXH,
  80                 .hw_addr.from   = S3C2410_PA_UART2 + S3C2410_URXH,
  81         },
  82         [DMACH_TIMER] = {
  83                 .name           = "timer",
  84                 .channels[0]    = S3C2410_DCON_CH0_TIMER | DMA_CH_VALID,
  85                 .channels[2]    = S3C2410_DCON_CH2_TIMER | DMA_CH_VALID,
  86                 .channels[3]    = S3C2410_DCON_CH3_TIMER | DMA_CH_VALID,
  87         },
  88         [DMACH_I2S_IN] = {
  89                 .name           = "i2s-sdi",
  90                 .channels[1]    = S3C2410_DCON_CH1_I2SSDI | DMA_CH_VALID,
  91                 .channels[2]    = S3C2410_DCON_CH2_I2SSDI | DMA_CH_VALID,
  92                 .hw_addr.from   = S3C2410_PA_IIS + S3C2410_IISFIFO,
  93         },
  94         [DMACH_I2S_OUT] = {
  95                 .name           = "i2s-sdo",
  96                 .channels[2]    = S3C2410_DCON_CH2_I2SSDO | DMA_CH_VALID,
  97                 .hw_addr.to     = S3C2410_PA_IIS + S3C2410_IISFIFO,
  98         },
  99         [DMACH_USB_EP1] = {
 100                 .name           = "usb-ep1",
 101                 .channels[0]    = S3C2410_DCON_CH0_USBEP1 | DMA_CH_VALID,
 102         },
 103         [DMACH_USB_EP2] = {
 104                 .name           = "usb-ep2",
 105                 .channels[1]    = S3C2410_DCON_CH1_USBEP2 | DMA_CH_VALID,
 106         },
 107         [DMACH_USB_EP3] = {
 108                 .name           = "usb-ep3",
 109                 .channels[2]    = S3C2410_DCON_CH2_USBEP3 | DMA_CH_VALID,
 110         },
 111         [DMACH_USB_EP4] = {
 112                 .name           = "usb-ep4",
 113                 .channels[3]    =S3C2410_DCON_CH3_USBEP4 | DMA_CH_VALID,
 114         },
 115 };
 116
 117 static void s3c2410_dma_select(struct s3c2410_dma_chan *chan,
 118                                struct s3c24xx_dma_map *map)
 119 {
 120         chan->dcon = map->channels[chan->number] & ~DMA_CH_VALID;
 121 }
 122
 123 static struct s3c24xx_dma_selection __initdata s3c2410_dma_sel = {
 124         .select         = s3c2410_dma_select,
 125         .dcon_mask      = 7 << 24,
 126         .map            = s3c2410_dma_mappings,
 127         .map_size       = ARRAY_SIZE(s3c2410_dma_mappings),
 128 };
 129
 130 static struct s3c24xx_dma_order __initdata s3c2410_dma_order = {
 131         .channels       = {
 132                 [DMACH_SDI]     = {
 133                         .list   = {
 134                                 [0]     = 3 | DMA_CH_VALID,
 135                                 [1]     = 2 | DMA_CH_VALID,
 136                                 [2]     = 0 | DMA_CH_VALID,
 137                         },
 138                 },
 139                 [DMACH_I2S_IN]  = {
 140                         .list   = {
 141                                 [0]     = 1 | DMA_CH_VALID,
 142                                 [1]     = 2 | DMA_CH_VALID,
 143                         },
 144                 },
 145         },
 146 };
 147
 148 static int s3c2410_dma_add(struct sys_device *sysdev)
 149 {
 150         s3c2410_dma_init();
 151         s3c24xx_dma_order_set(&s3c2410_dma_order);
 152         return s3c24xx_dma_init_map(&s3c2410_dma_sel);
 153 }
 154
 155 #if defined(CONFIG_CPU_S3C2410)
 156 static struct sysdev_driver s3c2410_dma_driver = {
 157         .add    = s3c2410_dma_add,
 158 };
 159
 160 static int __init s3c2410_dma_drvinit(void)
 161 {
 162         return sysdev_driver_register(&s3c2410_sysclass, &s3c2410_dma_driver);
 163 }
 164
 165 arch_initcall(s3c2410_dma_drvinit);
 166 #endif
 167
 168 #if defined(CONFIG_CPU_S3C2442)
 169 /* S3C2442 DMA contains the same selection table as the S3C2410 */
 170 static struct sysdev_driver s3c2442_dma_driver = {
 171         .add    = s3c2410_dma_add,
 172 };
 173
 174 static int __init s3c2442_dma_drvinit(void)
 175 {
 176         return sysdev_driver_register(&s3c2442_sysclass, &s3c2442_dma_driver);
 177 }
 178
 179 arch_initcall(s3c2442_dma_drvinit);
 180 #endif
 181