arch/arm/mach-s3c24xx/dma-s3c2440.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 #include <linux/serial_s3c.h>
  20
  21 #include <mach/map.h>
  22 #include <mach/dma.h>
  23
  24 #include <plat/dma-s3c24xx.h>
  25 #include <plat/cpu.h>
  26
  27 #include <mach/regs-gpio.h>
  28 #include <plat/regs-dma.h>
  29 #include <mach/regs-lcd.h>
  30 #include <plat/regs-spi.h>
  31
  32 static struct s3c24xx_dma_map __initdata s3c2440_dma_mappings[] = {
  33         [DMACH_XD0] = {
  34                 .name           = "xdreq0",
  35                 .channels[0]    = S3C2410_DCON_CH0_XDREQ0 | DMA_CH_VALID,
  36         },
  37         [DMACH_XD1] = {
  38                 .name           = "xdreq1",
  39                 .channels[1]    = S3C2410_DCON_CH1_XDREQ1 | DMA_CH_VALID,
  40         },
  41         [DMACH_SDI] = {
  42                 .name           = "sdi",
  43                 .channels[0]    = S3C2410_DCON_CH0_SDI | DMA_CH_VALID,
  44                 .channels[1]    = S3C2440_DCON_CH1_SDI | DMA_CH_VALID,
  45                 .channels[2]    = S3C2410_DCON_CH2_SDI | DMA_CH_VALID,
  46                 .channels[3]    = S3C2410_DCON_CH3_SDI | DMA_CH_VALID,
  47         },
  48         [DMACH_SPI0] = {
  49                 .name           = "spi0",
  50                 .channels[1]    = S3C2410_DCON_CH1_SPI | DMA_CH_VALID,
  51         },
  52         [DMACH_SPI1] = {
  53                 .name           = "spi1",
  54                 .channels[3]    = S3C2410_DCON_CH3_SPI | DMA_CH_VALID,
  55         },
  56         [DMACH_UART0] = {
  57                 .name           = "uart0",
  58                 .channels[0]    = S3C2410_DCON_CH0_UART0 | DMA_CH_VALID,
  59         },
  60         [DMACH_UART1] = {
  61                 .name           = "uart1",
  62                 .channels[1]    = S3C2410_DCON_CH1_UART1 | DMA_CH_VALID,
  63         },
  64         [DMACH_UART2] = {
  65                 .name           = "uart2",
  66                 .channels[3]    = S3C2410_DCON_CH3_UART2 | DMA_CH_VALID,
  67         },
  68         [DMACH_TIMER] = {
  69                 .name           = "timer",
  70                 .channels[0]    = S3C2410_DCON_CH0_TIMER | DMA_CH_VALID,
  71                 .channels[2]    = S3C2410_DCON_CH2_TIMER | DMA_CH_VALID,
  72                 .channels[3]    = S3C2410_DCON_CH3_TIMER | DMA_CH_VALID,
  73         },
  74         [DMACH_I2S_IN] = {
  75                 .name           = "i2s-sdi",
  76                 .channels[1]    = S3C2410_DCON_CH1_I2SSDI | DMA_CH_VALID,
  77                 .channels[2]    = S3C2410_DCON_CH2_I2SSDI | DMA_CH_VALID,
  78         },
  79         [DMACH_I2S_OUT] = {
  80                 .name           = "i2s-sdo",
  81                 .channels[0]    = S3C2440_DCON_CH0_I2SSDO | DMA_CH_VALID,
  82                 .channels[2]    = S3C2410_DCON_CH2_I2SSDO | DMA_CH_VALID,
  83         },
  84         [DMACH_PCM_IN] = {
  85                 .name           = "pcm-in",
  86                 .channels[0]    = S3C2440_DCON_CH0_PCMIN | DMA_CH_VALID,
  87                 .channels[2]    = S3C2440_DCON_CH2_PCMIN | DMA_CH_VALID,
  88         },
  89         [DMACH_PCM_OUT] = {
  90                 .name           = "pcm-out",
  91                 .channels[1]    = S3C2440_DCON_CH1_PCMOUT | DMA_CH_VALID,
  92                 .channels[3]    = S3C2440_DCON_CH3_PCMOUT | DMA_CH_VALID,
  93         },
  94         [DMACH_MIC_IN] = {
  95                 .name           = "mic-in",
  96                 .channels[2]    = S3C2440_DCON_CH2_MICIN | DMA_CH_VALID,
  97                 .channels[3]    = S3C2440_DCON_CH3_MICIN | DMA_CH_VALID,
  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 s3c2440_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 s3c2440_dma_sel = {
 124         .select         = s3c2440_dma_select,
 125         .dcon_mask      = 7 << 24,
 126         .map            = s3c2440_dma_mappings,
 127         .map_size       = ARRAY_SIZE(s3c2440_dma_mappings),
 128 };
 129
 130 static struct s3c24xx_dma_order __initdata s3c2440_dma_order = {
 131         .channels       = {
 132                 [DMACH_SDI]     = {
 133                         .list   = {
 134                                 [0]     = 3 | DMA_CH_VALID,
 135                                 [1]     = 2 | DMA_CH_VALID,
 136                                 [2]     = 1 | DMA_CH_VALID,
 137                                 [3]     = 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                 [DMACH_I2S_OUT] = {
 147                         .list   = {
 148                                 [0]     = 2 | DMA_CH_VALID,
 149                                 [1]     = 1 | DMA_CH_VALID,
 150                         },
 151                 },
 152                 [DMACH_PCM_IN] = {
 153                         .list   = {
 154                                 [0]     = 2 | DMA_CH_VALID,
 155                                 [1]     = 1 | DMA_CH_VALID,
 156                         },
 157                 },
 158                 [DMACH_PCM_OUT] = {
 159                         .list   = {
 160                                 [0]     = 1 | DMA_CH_VALID,
 161                                 [1]     = 3 | DMA_CH_VALID,
 162                         },
 163                 },
 164                 [DMACH_MIC_IN] = {
 165                         .list   = {
 166                                 [0]     = 3 | DMA_CH_VALID,
 167                                 [1]     = 2 | DMA_CH_VALID,
 168                         },
 169                 },
 170         },
 171 };
 172
 173 static int __init s3c2440_dma_add(struct device *dev,
 174                                   struct subsys_interface *sif)
 175 {
 176         s3c2410_dma_init();
 177         s3c24xx_dma_order_set(&s3c2440_dma_order);
 178         return s3c24xx_dma_init_map(&s3c2440_dma_sel);
 179 }
 180
 181 static struct subsys_interface s3c2440_dma_interface = {
 182         .name           = "s3c2440_dma",
 183         .subsys         = &s3c2440_subsys,
 184         .add_dev        = s3c2440_dma_add,
 185 };
 186
 187 static int __init s3c2440_dma_init(void)
 188 {
 189         return subsys_interface_register(&s3c2440_dma_interface);
 190 }
 191
 192 arch_initcall(s3c2440_dma_init);
 193