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/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-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         },
  51         [DMACH_SPI0] = {
  52                 .name           = "spi0",
  53                 .channels[1]    = S3C2410_DCON_CH1_SPI | DMA_CH_VALID,
  54         },
  55         [DMACH_SPI1] = {
  56                 .name           = "spi1",
  57                 .channels[3]    = S3C2410_DCON_CH3_SPI | DMA_CH_VALID,
  58         },
  59         [DMACH_UART0] = {
  60                 .name           = "uart0",
  61                 .channels[0]    = S3C2410_DCON_CH0_UART0 | DMA_CH_VALID,
  62         },
  63         [DMACH_UART1] = {
  64                 .name           = "uart1",
  65                 .channels[1]    = S3C2410_DCON_CH1_UART1 | DMA_CH_VALID,
  66         },
  67         [DMACH_UART2] = {
  68                 .name           = "uart2",
  69                 .channels[3]    = S3C2410_DCON_CH3_UART2 | DMA_CH_VALID,
  70         },
  71         [DMACH_TIMER] = {
  72                 .name           = "timer",
  73                 .channels[0]    = S3C2410_DCON_CH0_TIMER | DMA_CH_VALID,
  74                 .channels[2]    = S3C2410_DCON_CH2_TIMER | DMA_CH_VALID,
  75                 .channels[3]    = S3C2410_DCON_CH3_TIMER | DMA_CH_VALID,
  76         },
  77         [DMACH_I2S_IN] = {
  78                 .name           = "i2s-sdi",
  79                 .channels[1]    = S3C2410_DCON_CH1_I2SSDI | DMA_CH_VALID,
  80                 .channels[2]    = S3C2410_DCON_CH2_I2SSDI | DMA_CH_VALID,
  81         },
  82         [DMACH_I2S_OUT] = {
  83                 .name           = "i2s-sdo",
  84                 .channels[2]    = S3C2410_DCON_CH2_I2SSDO | DMA_CH_VALID,
  85         },
  86         [DMACH_USB_EP1] = {
  87                 .name           = "usb-ep1",
  88                 .channels[0]    = S3C2410_DCON_CH0_USBEP1 | DMA_CH_VALID,
  89         },
  90         [DMACH_USB_EP2] = {
  91                 .name           = "usb-ep2",
  92                 .channels[1]    = S3C2410_DCON_CH1_USBEP2 | DMA_CH_VALID,
  93         },
  94         [DMACH_USB_EP3] = {
  95                 .name           = "usb-ep3",
  96                 .channels[2]    = S3C2410_DCON_CH2_USBEP3 | DMA_CH_VALID,
  97         },
  98         [DMACH_USB_EP4] = {
  99                 .name           = "usb-ep4",
 100                 .channels[3]    =S3C2410_DCON_CH3_USBEP4 | DMA_CH_VALID,
 101         },
 102 };
 103
 104 static void s3c2410_dma_select(struct s3c2410_dma_chan *chan,
 105                                struct s3c24xx_dma_map *map)
 106 {
 107         chan->dcon = map->channels[chan->number] & ~DMA_CH_VALID;
 108 }
 109
 110 static struct s3c24xx_dma_selection __initdata s3c2410_dma_sel = {
 111         .select         = s3c2410_dma_select,
 112         .dcon_mask      = 7 << 24,
 113         .map            = s3c2410_dma_mappings,
 114         .map_size       = ARRAY_SIZE(s3c2410_dma_mappings),
 115 };
 116
 117 static struct s3c24xx_dma_order __initdata s3c2410_dma_order = {
 118         .channels       = {
 119                 [DMACH_SDI]     = {
 120                         .list   = {
 121                                 [0]     = 3 | DMA_CH_VALID,
 122                                 [1]     = 2 | DMA_CH_VALID,
 123                                 [2]     = 0 | DMA_CH_VALID,
 124                         },
 125                 },
 126                 [DMACH_I2S_IN]  = {
 127                         .list   = {
 128                                 [0]     = 1 | DMA_CH_VALID,
 129                                 [1]     = 2 | DMA_CH_VALID,
 130                         },
 131                 },
 132         },
 133 };
 134
 135 static int __init s3c2410_dma_add(struct device *dev)
 136 {
 137         s3c2410_dma_init();
 138         s3c24xx_dma_order_set(&s3c2410_dma_order);
 139         return s3c24xx_dma_init_map(&s3c2410_dma_sel);
 140 }
 141
 142 #if defined(CONFIG_CPU_S3C2410)
 143 static struct subsys_interface s3c2410_dma_interface = {
 144         .name           = "s3c2410_dma",
 145         .subsys         = &s3c2410_subsys,
 146         .add_dev        = s3c2410_dma_add,
 147 };
 148
 149 static int __init s3c2410_dma_drvinit(void)
 150 {
 151         return subsys_interface_register(&s3c2410_interface);
 152 }
 153
 154 arch_initcall(s3c2410_dma_drvinit);
 155
 156 static struct subsys_interface s3c2410a_dma_interface = {
 157         .name           = "s3c2410a_dma",
 158         .subsys         = &s3c2410a_subsys,
 159         .add_dev        = s3c2410_dma_add,
 160 };
 161
 162 static int __init s3c2410a_dma_drvinit(void)
 163 {
 164         return subsys_interface_register(&s3c2410a_dma_interface);
 165 }
 166
 167 arch_initcall(s3c2410a_dma_drvinit);
 168 #endif
 169
 170 #if defined(CONFIG_CPU_S3C2442)
 171 /* S3C2442 DMA contains the same selection table as the S3C2410 */
 172 static struct subsys_interface s3c2442_dma_interface = {
 173         .name           = "s3c2442_dma",
 174         .subsys         = &s3c2442_subsys,
 175         .add_dev        = s3c2410_dma_add,
 176 };
 177
 178 static int __init s3c2442_dma_drvinit(void)
 179 {
 180         return subsys_interface_register(&s3c2442_dma_interface);
 181 }
 182
 183 arch_initcall(s3c2442_dma_drvinit);
 184 #endif
 185