arch/arm/mach-s3c24xx/dma-s3c2410.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/device.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-s3c24xx.h>
  25
  26 #include <plat/regs-serial.h>
  27 #include <mach/regs-gpio.h>
  28 #include <plat/regs-dma.h>
  29 #include <mach/regs-lcd.h>
  30 #include <mach/regs-sdi.h>
  31 #include <plat/regs-spi.h>
  32
  33 static struct s3c24xx_dma_map __initdata s3c2410_dma_mappings[] = {
  34         [DMACH_XD0] = {
  35                 .name           = "xdreq0",
  36                 .channels[0]    = S3C2410_DCON_CH0_XDREQ0 | DMA_CH_VALID,
  37         },
  38         [DMACH_XD1] = {
  39                 .name           = "xdreq1",
  40                 .channels[1]    = S3C2410_DCON_CH1_XDREQ1 | DMA_CH_VALID,
  41         },
  42         [DMACH_SDI] = {
  43                 .name           = "sdi",
  44                 .channels[0]    = S3C2410_DCON_CH0_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[2]    = S3C2410_DCON_CH2_I2SSDO | DMA_CH_VALID,
  82         },
  83         [DMACH_USB_EP1] = {
  84                 .name           = "usb-ep1",
  85                 .channels[0]    = S3C2410_DCON_CH0_USBEP1 | DMA_CH_VALID,
  86         },
  87         [DMACH_USB_EP2] = {
  88                 .name           = "usb-ep2",
  89                 .channels[1]    = S3C2410_DCON_CH1_USBEP2 | DMA_CH_VALID,
  90         },
  91         [DMACH_USB_EP3] = {
  92                 .name           = "usb-ep3",
  93                 .channels[2]    = S3C2410_DCON_CH2_USBEP3 | DMA_CH_VALID,
  94         },
  95         [DMACH_USB_EP4] = {
  96                 .name           = "usb-ep4",
  97                 .channels[3]    =S3C2410_DCON_CH3_USBEP4 | DMA_CH_VALID,
  98         },
  99 };
 100
 101 static void s3c2410_dma_select(struct s3c2410_dma_chan *chan,
 102                                struct s3c24xx_dma_map *map)
 103 {
 104         chan->dcon = map->channels[chan->number] & ~DMA_CH_VALID;
 105 }
 106
 107 static struct s3c24xx_dma_selection __initdata s3c2410_dma_sel = {
 108         .select         = s3c2410_dma_select,
 109         .dcon_mask      = 7 << 24,
 110         .map            = s3c2410_dma_mappings,
 111         .map_size       = ARRAY_SIZE(s3c2410_dma_mappings),
 112 };
 113
 114 static struct s3c24xx_dma_order __initdata s3c2410_dma_order = {
 115         .channels       = {
 116                 [DMACH_SDI]     = {
 117                         .list   = {
 118                                 [0]     = 3 | DMA_CH_VALID,
 119                                 [1]     = 2 | DMA_CH_VALID,
 120                                 [2]     = 0 | DMA_CH_VALID,
 121                         },
 122                 },
 123                 [DMACH_I2S_IN]  = {
 124                         .list   = {
 125                                 [0]     = 1 | DMA_CH_VALID,
 126                                 [1]     = 2 | DMA_CH_VALID,
 127                         },
 128                 },
 129         },
 130 };
 131
 132 static int __init s3c2410_dma_add(struct device *dev,
 133                                   struct subsys_interface *sif)
 134 {
 135         s3c2410_dma_init();
 136         s3c24xx_dma_order_set(&s3c2410_dma_order);
 137         return s3c24xx_dma_init_map(&s3c2410_dma_sel);
 138 }
 139
 140 #if defined(CONFIG_CPU_S3C2410)
 141 static struct subsys_interface s3c2410_dma_interface = {
 142         .name           = "s3c2410_dma",
 143         .subsys         = &s3c2410_subsys,
 144         .add_dev        = s3c2410_dma_add,
 145 };
 146
 147 static int __init s3c2410_dma_drvinit(void)
 148 {
 149         return subsys_interface_register(&s3c2410_dma_interface);
 150 }
 151
 152 arch_initcall(s3c2410_dma_drvinit);
 153
 154 static struct subsys_interface s3c2410a_dma_interface = {
 155         .name           = "s3c2410a_dma",
 156         .subsys         = &s3c2410a_subsys,
 157         .add_dev        = s3c2410_dma_add,
 158 };
 159
 160 static int __init s3c2410a_dma_drvinit(void)
 161 {
 162         return subsys_interface_register(&s3c2410a_dma_interface);
 163 }
 164
 165 arch_initcall(s3c2410a_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 subsys_interface s3c2442_dma_interface = {
 171         .name           = "s3c2442_dma",
 172         .subsys         = &s3c2442_subsys,
 173         .add_dev        = s3c2410_dma_add,
 174 };
 175
 176 static int __init s3c2442_dma_drvinit(void)
 177 {
 178         return subsys_interface_register(&s3c2442_dma_interface);
 179 }
 180
 181 arch_initcall(s3c2442_dma_drvinit);
 182 #endif
 183