arch/arm/mach-ux500/usb.c

   1 /*
   2  * Copyright (C) ST-Ericsson SA 2011
   3  *
   4  * Author: Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com>
   5  * License terms: GNU General Public License (GPL) version 2
   6  */
   7 #include <linux/platform_device.h>
   8 #include <linux/usb/musb.h>
   9 #include <linux/dma-mapping.h>
  10 #include <plat/ste_dma40.h>
  11 #include <mach/hardware.h>
  12 #include <mach/usb.h>
  13
  14 #define MUSB_DMA40_RX_CH { \
  15                 .mode = STEDMA40_MODE_LOGICAL, \
  16                 .dir = STEDMA40_PERIPH_TO_MEM, \
  17                 .dst_dev_type = STEDMA40_DEV_DST_MEMORY, \
  18                 .src_info.data_width = STEDMA40_WORD_WIDTH, \
  19                 .dst_info.data_width = STEDMA40_WORD_WIDTH, \
  20                 .src_info.psize = STEDMA40_PSIZE_LOG_16, \
  21                 .dst_info.psize = STEDMA40_PSIZE_LOG_16, \
  22         }
  23
  24 #define MUSB_DMA40_TX_CH { \
  25                 .mode = STEDMA40_MODE_LOGICAL, \
  26                 .dir = STEDMA40_MEM_TO_PERIPH, \
  27                 .src_dev_type = STEDMA40_DEV_SRC_MEMORY, \
  28                 .src_info.data_width = STEDMA40_WORD_WIDTH, \
  29                 .dst_info.data_width = STEDMA40_WORD_WIDTH, \
  30                 .src_info.psize = STEDMA40_PSIZE_LOG_16, \
  31                 .dst_info.psize = STEDMA40_PSIZE_LOG_16, \
  32         }
  33
  34 static struct stedma40_chan_cfg musb_dma_rx_ch[UX500_MUSB_DMA_NUM_RX_CHANNELS]
  35         = {
  36         MUSB_DMA40_RX_CH,
  37         MUSB_DMA40_RX_CH,
  38         MUSB_DMA40_RX_CH,
  39         MUSB_DMA40_RX_CH,
  40         MUSB_DMA40_RX_CH,
  41         MUSB_DMA40_RX_CH,
  42         MUSB_DMA40_RX_CH,
  43         MUSB_DMA40_RX_CH
  44 };
  45
  46 static struct stedma40_chan_cfg musb_dma_tx_ch[UX500_MUSB_DMA_NUM_TX_CHANNELS]
  47         = {
  48         MUSB_DMA40_TX_CH,
  49         MUSB_DMA40_TX_CH,
  50         MUSB_DMA40_TX_CH,
  51         MUSB_DMA40_TX_CH,
  52         MUSB_DMA40_TX_CH,
  53         MUSB_DMA40_TX_CH,
  54         MUSB_DMA40_TX_CH,
  55         MUSB_DMA40_TX_CH,
  56 };
  57
  58 static void *ux500_dma_rx_param_array[UX500_MUSB_DMA_NUM_RX_CHANNELS] = {
  59         &musb_dma_rx_ch[0],
  60         &musb_dma_rx_ch[1],
  61         &musb_dma_rx_ch[2],
  62         &musb_dma_rx_ch[3],
  63         &musb_dma_rx_ch[4],
  64         &musb_dma_rx_ch[5],
  65         &musb_dma_rx_ch[6],
  66         &musb_dma_rx_ch[7]
  67 };
  68
  69 static void *ux500_dma_tx_param_array[UX500_MUSB_DMA_NUM_TX_CHANNELS] = {
  70         &musb_dma_tx_ch[0],
  71         &musb_dma_tx_ch[1],
  72         &musb_dma_tx_ch[2],
  73         &musb_dma_tx_ch[3],
  74         &musb_dma_tx_ch[4],
  75         &musb_dma_tx_ch[5],
  76         &musb_dma_tx_ch[6],
  77         &musb_dma_tx_ch[7]
  78 };
  79
  80 static struct ux500_musb_board_data musb_board_data = {
  81         .dma_rx_param_array = ux500_dma_rx_param_array,
  82         .dma_tx_param_array = ux500_dma_tx_param_array,
  83         .num_rx_channels = UX500_MUSB_DMA_NUM_RX_CHANNELS,
  84         .num_tx_channels = UX500_MUSB_DMA_NUM_TX_CHANNELS,
  85         .dma_filter = stedma40_filter,
  86 };
  87
  88 static u64 ux500_musb_dmamask = DMA_BIT_MASK(32);
  89
  90 static struct musb_hdrc_config musb_hdrc_config = {
  91         .multipoint     = true,
  92         .dyn_fifo       = true,
  93         .num_eps        = 16,
  94         .ram_bits       = 16,
  95 };
  96
  97 static struct musb_hdrc_platform_data musb_platform_data = {
  98         .mode = MUSB_OTG,
  99         .config = &musb_hdrc_config,
 100         .board_data = &musb_board_data,
 101 };
 102
 103 static struct resource usb_resources[] = {
 104         [0] = {
 105                 .name   = "usb-mem",
 106                 .flags  =  IORESOURCE_MEM,
 107         },
 108
 109         [1] = {
 110                 .name   = "mc", /* hard-coded in musb */
 111                 .flags  = IORESOURCE_IRQ,
 112         },
 113 };
 114
 115 struct platform_device ux500_musb_device = {
 116         .name = "musb-ux500",
 117         .id = 0,
 118         .dev = {
 119                 .platform_data = &musb_platform_data,
 120                 .dma_mask = &ux500_musb_dmamask,
 121                 .coherent_dma_mask = DMA_BIT_MASK(32),
 122         },
 123         .num_resources = ARRAY_SIZE(usb_resources),
 124         .resource = usb_resources,
 125 };
 126
 127 static inline void ux500_usb_dma_update_rx_ch_config(int *src_dev_type)
 128 {
 129         u32 idx;
 130
 131         for (idx = 0; idx < UX500_MUSB_DMA_NUM_RX_CHANNELS; idx++)
 132                 musb_dma_rx_ch[idx].src_dev_type = src_dev_type[idx];
 133 }
 134
 135 static inline void ux500_usb_dma_update_tx_ch_config(int *dst_dev_type)
 136 {
 137         u32 idx;
 138
 139         for (idx = 0; idx < UX500_MUSB_DMA_NUM_TX_CHANNELS; idx++)
 140                 musb_dma_tx_ch[idx].dst_dev_type = dst_dev_type[idx];
 141 }
 142
 143 void ux500_add_usb(resource_size_t base, int irq, int *dma_rx_cfg,
 144         int *dma_tx_cfg)
 145 {
 146         ux500_musb_device.resource[0].start = base;
 147         ux500_musb_device.resource[0].end = base + SZ_64K - 1;
 148         ux500_musb_device.resource[1].start = irq;
 149         ux500_musb_device.resource[1].end = irq;
 150
 151         ux500_usb_dma_update_rx_ch_config(dma_rx_cfg);
 152         ux500_usb_dma_update_tx_ch_config(dma_tx_cfg);
 153
 154         platform_device_register(&ux500_musb_device);
 155 }