arch/arm/mach-s3c2440/dma.c

   1 /* linux/arch/arm/mach-s3c2440/dma.c
   2  *
   3  * Copyright (c) 2006 Simtec Electronics
   4  *      Ben Dooks <ben@simtec.co.uk>
   5  *
   6  * S3C2440 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/device.h>
  18 #include <linux/serial_core.h>
  19
  20 #include <mach/map.h>
  21 #include <mach/dma.h>
  22
  23 #include <plat/dma-s3c24xx.h>
  24 #include <plat/cpu.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 s3c2440_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[1]    = S3C2440_DCON_CH1_SDI | DMA_CH_VALID,
  49                 .channels[2]    = S3C2410_DCON_CH2_SDI | DMA_CH_VALID,
  50                 .channels[3]    = S3C2410_DCON_CH3_SDI | DMA_CH_VALID,
  51         },
  52         [DMACH_SPI0] = {
  53                 .name           = "spi0",
  54                 .channels[1]    = S3C2410_DCON_CH1_SPI | DMA_CH_VALID,
  55         },
  56         [DMACH_SPI1] = {
  57                 .name           = "spi1",
  58                 .channels[3]    = S3C2410_DCON_CH3_SPI | DMA_CH_VALID,
  59         },
  60         [DMACH_UART0] = {
  61                 .name           = "uart0",
  62                 .channels[0]    = S3C2410_DCON_CH0_UART0 | DMA_CH_VALID,
  63         },
  64         [DMACH_UART1] = {
  65                 .name           = "uart1",
  66                 .channels[1]    = S3C2410_DCON_CH1_UART1 | DMA_CH_VALID,
  67         },
  68         [DMACH_UART2] = {
  69                 .name           = "uart2",
  70                 .channels[3]    = S3C2410_DCON_CH3_UART2 | DMA_CH_VALID,
  71         },
  72         [DMACH_TIMER] = {
  73                 .name           = "timer",
  74                 .channels[0]    = S3C2410_DCON_CH0_TIMER | DMA_CH_VALID,
  75                 .channels[2]    = S3C2410_DCON_CH2_TIMER | DMA_CH_VALID,
  76                 .channels[3]    = S3C2410_DCON_CH3_TIMER | DMA_CH_VALID,
  77         },
  78         [DMACH_I2S_IN] = {
  79                 .name           = "i2s-sdi",
  80                 .channels[1]    = S3C2410_DCON_CH1_I2SSDI | DMA_CH_VALID,
  81                 .channels[2]    = S3C2410_DCON_CH2_I2SSDI | DMA_CH_VALID,
  82         },
  83         [DMACH_I2S_OUT] = {
  84                 .name           = "i2s-sdo",
  85                 .channels[0]    = S3C2440_DCON_CH0_I2SSDO | DMA_CH_VALID,
  86                 .channels[2]    = S3C2410_DCON_CH2_I2SSDO | DMA_CH_VALID,
  87         },
  88         [DMACH_PCM_IN] = {
  89                 .name           = "pcm-in",
  90                 .channels[0]    = S3C2440_DCON_CH0_PCMIN | DMA_CH_VALID,
  91                 .channels[2]    = S3C2440_DCON_CH2_PCMIN | DMA_CH_VALID,
  92         },
  93         [DMACH_PCM_OUT] = {
  94                 .name           = "pcm-out",
  95                 .channels[1]    = S3C2440_DCON_CH1_PCMOUT | DMA_CH_VALID,
  96                 .channels[3]    = S3C2440_DCON_CH3_PCMOUT | DMA_CH_VALID,
  97         },
  98         [DMACH_MIC_IN] = {
  99                 .name           = "mic-in",
 100                 .channels[2]    = S3C2440_DCON_CH2_MICIN | DMA_CH_VALID,
 101                 .channels[3]    = S3C2440_DCON_CH3_MICIN | DMA_CH_VALID,
 102         },
 103         [DMACH_USB_EP1] = {
 104                 .name           = "usb-ep1",
 105                 .channels[0]    = S3C2410_DCON_CH0_USBEP1 | DMA_CH_VALID,
 106         },
 107         [DMACH_USB_EP2] = {
 108                 .name           = "usb-ep2",
 109                 .channels[1]    = S3C2410_DCON_CH1_USBEP2 | DMA_CH_VALID,
 110         },
 111         [DMACH_USB_EP3] = {
 112                 .name           = "usb-ep3",
 113                 .channels[2]    = S3C2410_DCON_CH2_USBEP3 | DMA_CH_VALID,
 114         },
 115         [DMACH_USB_EP4] = {
 116                 .name           = "usb-ep4",
 117                 .channels[3]    = S3C2410_DCON_CH3_USBEP4 | DMA_CH_VALID,
 118         },
 119 };
 120
 121 static void s3c2440_dma_select(struct s3c2410_dma_chan *chan,
 122                                struct s3c24xx_dma_map *map)
 123 {
 124         chan->dcon = map->channels[chan->number] & ~DMA_CH_VALID;
 125 }
 126
 127 static struct s3c24xx_dma_selection __initdata s3c2440_dma_sel = {
 128         .select         = s3c2440_dma_select,
 129         .dcon_mask      = 7 << 24,
 130         .map            = s3c2440_dma_mappings,
 131         .map_size       = ARRAY_SIZE(s3c2440_dma_mappings),
 132 };
 133
 134 static struct s3c24xx_dma_order __initdata s3c2440_dma_order = {
 135         .channels       = {
 136                 [DMACH_SDI]     = {
 137                         .list   = {
 138                                 [0]     = 3 | DMA_CH_VALID,
 139                                 [1]     = 2 | DMA_CH_VALID,
 140                                 [2]     = 1 | DMA_CH_VALID,
 141                                 [3]     = 0 | DMA_CH_VALID,
 142                         },
 143                 },
 144                 [DMACH_I2S_IN]  = {
 145                         .list   = {
 146                                 [0]     = 1 | DMA_CH_VALID,
 147                                 [1]     = 2 | DMA_CH_VALID,
 148                         },
 149                 },
 150                 [DMACH_I2S_OUT] = {
 151                         .list   = {
 152                                 [0]     = 2 | DMA_CH_VALID,
 153                                 [1]     = 1 | DMA_CH_VALID,
 154                         },
 155                 },
 156                 [DMACH_PCM_IN] = {
 157                         .list   = {
 158                                 [0]     = 2 | DMA_CH_VALID,
 159                                 [1]     = 1 | DMA_CH_VALID,
 160                         },
 161                 },
 162                 [DMACH_PCM_OUT] = {
 163                         .list   = {
 164                                 [0]     = 1 | DMA_CH_VALID,
 165                                 [1]     = 3 | DMA_CH_VALID,
 166                         },
 167                 },
 168                 [DMACH_MIC_IN] = {
 169                         .list   = {
 170                                 [0]     = 3 | DMA_CH_VALID,
 171                                 [1]     = 2 | DMA_CH_VALID,
 172                         },
 173                 },
 174         },
 175 };
 176
 177 static int __init s3c2440_dma_add(struct device *dev,
 178                                   struct subsys_interface *sif)
 179 {
 180         s3c2410_dma_init();
 181         s3c24xx_dma_order_set(&s3c2440_dma_order);
 182         return s3c24xx_dma_init_map(&s3c2440_dma_sel);
 183 }
 184
 185 static struct subsys_interface s3c2440_dma_interface = {
 186         .name           = "s3c2440_dma",
 187         .subsys         = &s3c2440_subsys,
 188         .add_dev        = s3c2440_dma_add,
 189 };
 190
 191 static int __init s3c2440_dma_init(void)
 192 {
 193         return subsys_interface_register(&s3c2440_dma_interface);
 194 }
 195
 196 arch_initcall(s3c2440_dma_init);
 197