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   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 <mach/map.h>
  21 #include <mach/dma.h>
  22
  23 #include <plat/cpu.h>
  24 #include <plat/dma-plat.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 s3c2410_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[2]    = S3C2410_DCON_CH2_SDI | DMA_CH_VALID,
  49                 .channels[3]    = S3C2410_DCON_CH3_SDI | DMA_CH_VALID,
  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[1]    = S3C2410_DCON_CH1_SPI | DMA_CH_VALID,
  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[3]    = S3C2410_DCON_CH3_SPI | DMA_CH_VALID,
  62                 .hw_addr.to     = S3C2410_PA_SPI + 0x20 + S3C2410_SPTDAT,
  63                 .hw_addr.from   = S3C2410_PA_SPI + 0x20 + S3C2410_SPRDAT,
  64         },
  65         [DMACH_UART0] = {
  66                 .name           = "uart0",
  67                 .channels[0]    = S3C2410_DCON_CH0_UART0 | DMA_CH_VALID,
  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[1]    = S3C2410_DCON_CH1_UART1 | DMA_CH_VALID,
  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[3]    = S3C2410_DCON_CH3_UART2 | DMA_CH_VALID,
  80                 .hw_addr.to     = S3C2410_PA_UART2 + S3C2410_UTXH,
  81                 .hw_addr.from   = S3C2410_PA_UART2 + S3C2410_URXH,
  82         },
  83         [DMACH_TIMER] = {
  84                 .name           = "timer",
  85                 .channels[0]    = S3C2410_DCON_CH0_TIMER | DMA_CH_VALID,
  86                 .channels[2]    = S3C2410_DCON_CH2_TIMER | DMA_CH_VALID,
  87                 .channels[3]    = S3C2410_DCON_CH3_TIMER | DMA_CH_VALID,
  88         },
  89         [DMACH_I2S_IN] = {
  90                 .name           = "i2s-sdi",
  91                 .channels[1]    = S3C2410_DCON_CH1_I2SSDI | DMA_CH_VALID,
  92                 .channels[2]    = S3C2410_DCON_CH2_I2SSDI | DMA_CH_VALID,
  93                 .hw_addr.from   = S3C2410_PA_IIS + S3C2410_IISFIFO,
  94         },
  95         [DMACH_I2S_OUT] = {
  96                 .name           = "i2s-sdo",
  97                 .channels[2]    = S3C2410_DCON_CH2_I2SSDO | DMA_CH_VALID,
  98                 .hw_addr.to     = S3C2410_PA_IIS + S3C2410_IISFIFO,
  99         },
 100         [DMACH_USB_EP1] = {
 101                 .name           = "usb-ep1",
 102                 .channels[0]    = S3C2410_DCON_CH0_USBEP1 | DMA_CH_VALID,
 103         },
 104         [DMACH_USB_EP2] = {
 105                 .name           = "usb-ep2",
 106                 .channels[1]    = S3C2410_DCON_CH1_USBEP2 | DMA_CH_VALID,
 107         },
 108         [DMACH_USB_EP3] = {
 109                 .name           = "usb-ep3",
 110                 .channels[2]    = S3C2410_DCON_CH2_USBEP3 | DMA_CH_VALID,
 111         },
 112         [DMACH_USB_EP4] = {
 113                 .name           = "usb-ep4",
 114                 .channels[3]    =S3C2410_DCON_CH3_USBEP4 | DMA_CH_VALID,
 115         },
 116 };
 117
 118 static void s3c2410_dma_select(struct s3c2410_dma_chan *chan,
 119                                struct s3c24xx_dma_map *map)
 120 {
 121         chan->dcon = map->channels[chan->number] & ~DMA_CH_VALID;
 122 }
 123
 124 static struct s3c24xx_dma_selection __initdata s3c2410_dma_sel = {
 125         .select         = s3c2410_dma_select,
 126         .dcon_mask      = 7 << 24,
 127         .map            = s3c2410_dma_mappings,
 128         .map_size       = ARRAY_SIZE(s3c2410_dma_mappings),
 129 };
 130
 131 static struct s3c24xx_dma_order __initdata s3c2410_dma_order = {
 132         .channels       = {
 133                 [DMACH_SDI]     = {
 134                         .list   = {
 135                                 [0]     = 3 | DMA_CH_VALID,
 136                                 [1]     = 2 | DMA_CH_VALID,
 137                                 [2]     = 0 | DMA_CH_VALID,
 138                         },
 139                 },
 140                 [DMACH_I2S_IN]  = {
 141                         .list   = {
 142                                 [0]     = 1 | DMA_CH_VALID,
 143                                 [1]     = 2 | DMA_CH_VALID,
 144                         },
 145                 },
 146         },
 147 };
 148
 149 static int __init s3c2410_dma_add(struct sys_device *sysdev)
 150 {
 151         s3c2410_dma_init();
 152         s3c24xx_dma_order_set(&s3c2410_dma_order);
 153         return s3c24xx_dma_init_map(&s3c2410_dma_sel);
 154 }
 155
 156 #if defined(CONFIG_CPU_S3C2410)
 157 static struct sysdev_driver s3c2410_dma_driver = {
 158         .add    = s3c2410_dma_add,
 159 };
 160
 161 static int __init s3c2410_dma_drvinit(void)
 162 {
 163         return sysdev_driver_register(&s3c2410_sysclass, &s3c2410_dma_driver);
 164 }
 165
 166 arch_initcall(s3c2410_dma_drvinit);
 167 #endif
 168
 169 #if defined(CONFIG_CPU_S3C2442)
 170 /* S3C2442 DMA contains the same selection table as the S3C2410 */
 171 static struct sysdev_driver s3c2442_dma_driver = {
 172         .add    = s3c2410_dma_add,
 173 };
 174
 175 static int __init s3c2442_dma_drvinit(void)
 176 {
 177         return sysdev_driver_register(&s3c2442_sysclass, &s3c2442_dma_driver);
 178 }
 179
 180 arch_initcall(s3c2442_dma_drvinit);
 181 #endif
 182