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 <plat/ste_dma40.h>
  10 #include <mach/hardware.h>
  11 #include <mach/usb.h>
  12
  13 #define MUSB_DMA40_RX_CH { \
  14                 .mode = STEDMA40_MODE_LOGICAL, \
  15                 .dir = STEDMA40_PERIPH_TO_MEM, \
  16                 .dst_dev_type = STEDMA40_DEV_DST_MEMORY, \
  17                 .src_info.data_width = STEDMA40_WORD_WIDTH, \
  18                 .dst_info.data_width = STEDMA40_WORD_WIDTH, \
  19                 .src_info.psize = STEDMA40_PSIZE_LOG_16, \
  20                 .dst_info.psize = STEDMA40_PSIZE_LOG_16, \
  21         }
  22
  23 #define MUSB_DMA40_TX_CH { \
  24                 .mode = STEDMA40_MODE_LOGICAL, \
  25                 .dir = STEDMA40_MEM_TO_PERIPH, \
  26                 .src_dev_type = STEDMA40_DEV_SRC_MEMORY, \
  27                 .src_info.data_width = STEDMA40_WORD_WIDTH, \
  28                 .dst_info.data_width = STEDMA40_WORD_WIDTH, \
  29                 .src_info.psize = STEDMA40_PSIZE_LOG_16, \
  30                 .dst_info.psize = STEDMA40_PSIZE_LOG_16, \
  31         }
  32
  33 static struct stedma40_chan_cfg musb_dma_rx_ch[UX500_MUSB_DMA_NUM_RX_CHANNELS]
  34         = {
  35         MUSB_DMA40_RX_CH,
  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 };
  44
  45 static struct stedma40_chan_cfg musb_dma_tx_ch[UX500_MUSB_DMA_NUM_TX_CHANNELS]
  46         = {
  47         MUSB_DMA40_TX_CH,
  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 };
  56
  57 static void *ux500_dma_rx_param_array[UX500_MUSB_DMA_NUM_RX_CHANNELS] = {
  58         &musb_dma_rx_ch[0],
  59         &musb_dma_rx_ch[1],
  60         &musb_dma_rx_ch[2],
  61         &musb_dma_rx_ch[3],
  62         &musb_dma_rx_ch[4],
  63         &musb_dma_rx_ch[5],
  64         &musb_dma_rx_ch[6],
  65         &musb_dma_rx_ch[7]
  66 };
  67
  68 static void *ux500_dma_tx_param_array[UX500_MUSB_DMA_NUM_TX_CHANNELS] = {
  69         &musb_dma_tx_ch[0],
  70         &musb_dma_tx_ch[1],
  71         &musb_dma_tx_ch[2],
  72         &musb_dma_tx_ch[3],
  73         &musb_dma_tx_ch[4],
  74         &musb_dma_tx_ch[5],
  75         &musb_dma_tx_ch[6],
  76         &musb_dma_tx_ch[7]
  77 };
  78
  79 static struct ux500_musb_board_data musb_board_data = {
  80         .dma_rx_param_array = ux500_dma_rx_param_array,
  81         .dma_tx_param_array = ux500_dma_tx_param_array,
  82         .num_rx_channels = UX500_MUSB_DMA_NUM_RX_CHANNELS,
  83         .num_tx_channels = UX500_MUSB_DMA_NUM_TX_CHANNELS,
  84         .dma_filter = stedma40_filter,
  85 };
  86
  87 static u64 ux500_musb_dmamask = DMA_BIT_MASK(32);
  88
  89 static struct musb_hdrc_config musb_hdrc_config = {
  90         .multipoint     = true,
  91         .dyn_fifo       = true,
  92         .num_eps        = 16,
  93         .ram_bits       = 16,
  94 };
  95
  96 static struct musb_hdrc_platform_data musb_platform_data = {
  97 #if defined(CONFIG_USB_MUSB_OTG)
  98         .mode = MUSB_OTG,
  99 #elif defined(CONFIG_USB_MUSB_PERIPHERAL)
 100         .mode = MUSB_PERIPHERAL,
 101 #else /* defined(CONFIG_USB_MUSB_HOST) */
 102         .mode = MUSB_HOST,
 103 #endif
 104         .config = &musb_hdrc_config,
 105         .board_data = &musb_board_data,
 106 };
 107
 108 static struct resource usb_resources[] = {
 109         [0] = {
 110                 .name   = "usb-mem",
 111                 .flags  =  IORESOURCE_MEM,
 112         },
 113
 114         [1] = {
 115                 .name   = "mc", /* hard-coded in musb */
 116                 .flags  = IORESOURCE_IRQ,
 117         },
 118 };
 119
 120 struct platform_device ux500_musb_device = {
 121         .name = "musb-ux500",
 122         .id = 0,
 123         .dev = {
 124                 .platform_data = &musb_platform_data,
 125                 .dma_mask = &ux500_musb_dmamask,
 126                 .coherent_dma_mask = DMA_BIT_MASK(32),
 127         },
 128         .num_resources = ARRAY_SIZE(usb_resources),
 129         .resource = usb_resources,
 130 };
 131
 132 static inline void ux500_usb_dma_update_rx_ch_config(int *src_dev_type)
 133 {
 134         u32 idx;
 135
 136         for (idx = 0; idx < UX500_MUSB_DMA_NUM_RX_CHANNELS; idx++)
 137                 musb_dma_rx_ch[idx].src_dev_type = src_dev_type[idx];
 138 }
 139
 140 static inline void ux500_usb_dma_update_tx_ch_config(int *dst_dev_type)
 141 {
 142         u32 idx;
 143
 144         for (idx = 0; idx < UX500_MUSB_DMA_NUM_TX_CHANNELS; idx++)
 145                 musb_dma_tx_ch[idx].dst_dev_type = dst_dev_type[idx];
 146 }
 147
 148 void ux500_add_usb(resource_size_t base, int irq, int *dma_rx_cfg,
 149         int *dma_tx_cfg)
 150 {
 151         ux500_musb_device.resource[0].start = base;
 152         ux500_musb_device.resource[0].end = base + SZ_64K - 1;
 153         ux500_musb_device.resource[1].start = irq;
 154         ux500_musb_device.resource[1].end = irq;
 155
 156         ux500_usb_dma_update_rx_ch_config(dma_rx_cfg);
 157         ux500_usb_dma_update_tx_ch_config(dma_tx_cfg);
 158
 159         platform_device_register(&ux500_musb_device);
 160 }