arch/arm/mach-ux500/dma-db5500.c

   1 /*
   2  * Copyright (C) ST-Ericsson SA 2010
   3  *
   4  * Author: Per Forlin <per.forlin@stericsson.com> for ST-Ericsson
   5  * Author: Jonas Aaberg <jonas.aberg@stericsson.com> for ST-Ericsson
   6  * Author: Rabin Vincent <rabinv.vincent@stericsson.com> for ST-Ericsson
   7  *
   8  * License terms: GNU General Public License (GPL), version 2
   9  */
  10
  11 #include <linux/kernel.h>
  12 #include <linux/platform_device.h>
  13
  14 #include <plat/ste_dma40.h>
  15 #include <mach/setup.h>
  16 #include <mach/hardware.h>
  17
  18 #include "ste-dma40-db5500.h"
  19
  20 static struct resource dma40_resources[] = {
  21         [0] = {
  22                 .start = U5500_DMA_BASE,
  23                 .end   = U5500_DMA_BASE + SZ_4K - 1,
  24                 .flags = IORESOURCE_MEM,
  25                 .name  = "base",
  26         },
  27         [1] = {
  28                 .start = U5500_DMA_LCPA_BASE,
  29                 .end   = U5500_DMA_LCPA_BASE + 2 * SZ_1K - 1,
  30                 .flags = IORESOURCE_MEM,
  31                 .name  = "lcpa",
  32         },
  33         [2] = {
  34                 .start = IRQ_DB5500_DMA,
  35                 .end   = IRQ_DB5500_DMA,
  36                 .flags = IORESOURCE_IRQ
  37         }
  38 };
  39
  40 /* Default configuration for physical memcpy */
  41 static struct stedma40_chan_cfg dma40_memcpy_conf_phy = {
  42         .mode = STEDMA40_MODE_PHYSICAL,
  43         .dir = STEDMA40_MEM_TO_MEM,
  44
  45         .src_info.data_width = STEDMA40_BYTE_WIDTH,
  46         .src_info.psize = STEDMA40_PSIZE_PHY_1,
  47         .src_info.flow_ctrl = STEDMA40_NO_FLOW_CTRL,
  48
  49         .dst_info.data_width = STEDMA40_BYTE_WIDTH,
  50         .dst_info.psize = STEDMA40_PSIZE_PHY_1,
  51         .dst_info.flow_ctrl = STEDMA40_NO_FLOW_CTRL,
  52 };
  53
  54 /* Default configuration for logical memcpy */
  55 static struct stedma40_chan_cfg dma40_memcpy_conf_log = {
  56         .dir = STEDMA40_MEM_TO_MEM,
  57
  58         .src_info.data_width = STEDMA40_BYTE_WIDTH,
  59         .src_info.psize = STEDMA40_PSIZE_LOG_1,
  60         .src_info.flow_ctrl = STEDMA40_NO_FLOW_CTRL,
  61
  62         .dst_info.data_width = STEDMA40_BYTE_WIDTH,
  63         .dst_info.psize = STEDMA40_PSIZE_LOG_1,
  64         .dst_info.flow_ctrl = STEDMA40_NO_FLOW_CTRL,
  65 };
  66
  67 /*
  68  * Mapping between soruce event lines and physical device address This was
  69  * created assuming that the event line is tied to a device and therefore the
  70  * address is constant, however this is not true for at least USB, and the
  71  * values are just placeholders for USB.  This table is preserved and used for
  72  * now.
  73  */
  74 static const dma_addr_t dma40_rx_map[DB5500_DMA_NR_DEV] = {
  75         [DB5500_DMA_DEV24_SDMMC0_RX] = -1,
  76 };
  77
  78 /* Mapping between destination event lines and physical device address */
  79 static const dma_addr_t dma40_tx_map[DB5500_DMA_NR_DEV] = {
  80         [DB5500_DMA_DEV24_SDMMC0_TX] = -1,
  81 };
  82
  83 static int dma40_memcpy_event[] = {
  84         DB5500_DMA_MEMCPY_TX_1,
  85         DB5500_DMA_MEMCPY_TX_2,
  86         DB5500_DMA_MEMCPY_TX_3,
  87         DB5500_DMA_MEMCPY_TX_4,
  88         DB5500_DMA_MEMCPY_TX_5,
  89 };
  90
  91 static struct stedma40_platform_data dma40_plat_data = {
  92         .dev_len                = ARRAY_SIZE(dma40_rx_map),
  93         .dev_rx                 = dma40_rx_map,
  94         .dev_tx                 = dma40_tx_map,
  95         .memcpy                 = dma40_memcpy_event,
  96         .memcpy_len             = ARRAY_SIZE(dma40_memcpy_event),
  97         .memcpy_conf_phy        = &dma40_memcpy_conf_phy,
  98         .memcpy_conf_log        = &dma40_memcpy_conf_log,
  99         .disabled_channels      = {-1},
 100 };
 101
 102 static struct platform_device dma40_device = {
 103         .dev = {
 104                 .platform_data = &dma40_plat_data,
 105         },
 106         .name           = "dma40",
 107         .id             = 0,
 108         .num_resources  = ARRAY_SIZE(dma40_resources),
 109         .resource       = dma40_resources
 110 };
 111
 112 void __init db5500_dma_init(void)
 113 {
 114         int ret;
 115
 116         ret = platform_device_register(&dma40_device);
 117         if (ret)
 118                 dev_err(&dma40_device.dev, "unable to register device: %d\n", ret);
 119
 120 }