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         [DB5500_DMA_DEV38_USB_OTG_IEP_8] = -1,
  77         [DB5500_DMA_DEV23_USB_OTG_IEP_7_15] = -1,
  78         [DB5500_DMA_DEV22_USB_OTG_IEP_6_14] = -1,
  79         [DB5500_DMA_DEV21_USB_OTG_IEP_5_13] = -1,
  80         [DB5500_DMA_DEV20_USB_OTG_IEP_4_12] = -1,
  81         [DB5500_DMA_DEV6_USB_OTG_IEP_3_11] = -1,
  82         [DB5500_DMA_DEV5_USB_OTG_IEP_2_10] = -1,
  83         [DB5500_DMA_DEV4_USB_OTG_IEP_1_9] = -1,
  84 };
  85
  86 /* Mapping between destination event lines and physical device address */
  87 static const dma_addr_t dma40_tx_map[DB5500_DMA_NR_DEV] = {
  88         [DB5500_DMA_DEV24_SDMMC0_TX] = -1,
  89         [DB5500_DMA_DEV38_USB_OTG_OEP_8] = -1,
  90         [DB5500_DMA_DEV23_USB_OTG_OEP_7_15] = -1,
  91         [DB5500_DMA_DEV22_USB_OTG_OEP_6_14] = -1,
  92         [DB5500_DMA_DEV21_USB_OTG_OEP_5_13] = -1,
  93         [DB5500_DMA_DEV20_USB_OTG_OEP_4_12] = -1,
  94         [DB5500_DMA_DEV6_USB_OTG_OEP_3_11] = -1,
  95         [DB5500_DMA_DEV5_USB_OTG_OEP_2_10] = -1,
  96         [DB5500_DMA_DEV4_USB_OTG_OEP_1_9] = -1,
  97 };
  98
  99 static int dma40_memcpy_event[] = {
 100         DB5500_DMA_MEMCPY_TX_1,
 101         DB5500_DMA_MEMCPY_TX_2,
 102         DB5500_DMA_MEMCPY_TX_3,
 103         DB5500_DMA_MEMCPY_TX_4,
 104         DB5500_DMA_MEMCPY_TX_5,
 105 };
 106
 107 static struct stedma40_platform_data dma40_plat_data = {
 108         .dev_len                = ARRAY_SIZE(dma40_rx_map),
 109         .dev_rx                 = dma40_rx_map,
 110         .dev_tx                 = dma40_tx_map,
 111         .memcpy                 = dma40_memcpy_event,
 112         .memcpy_len             = ARRAY_SIZE(dma40_memcpy_event),
 113         .memcpy_conf_phy        = &dma40_memcpy_conf_phy,
 114         .memcpy_conf_log        = &dma40_memcpy_conf_log,
 115         .disabled_channels      = {-1},
 116 };
 117
 118 static struct platform_device dma40_device = {
 119         .dev = {
 120                 .platform_data = &dma40_plat_data,
 121         },
 122         .name           = "dma40",
 123         .id             = 0,
 124         .num_resources  = ARRAY_SIZE(dma40_resources),
 125         .resource       = dma40_resources
 126 };
 127
 128 void __init db5500_dma_init(void)
 129 {
 130         int ret;
 131
 132         ret = platform_device_register(&dma40_device);
 133         if (ret)
 134                 dev_err(&dma40_device.dev, "unable to register device: %d\n", ret);
 135
 136 }