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 <linux/platform_data/usb-musb-ux500.h>
  11 #include <linux/platform_data/dma-ste-dma40.h>
  12
  13 #include "db8500-regs.h"
  14
  15 #define MUSB_DMA40_RX_CH { \
  16                 .mode = STEDMA40_MODE_LOGICAL, \
  17                 .dir = STEDMA40_PERIPH_TO_MEM, \
  18                 .dst_dev_type = STEDMA40_DEV_DST_MEMORY, \
  19                 .src_info.data_width = STEDMA40_WORD_WIDTH, \
  20                 .dst_info.data_width = STEDMA40_WORD_WIDTH, \
  21                 .src_info.psize = STEDMA40_PSIZE_LOG_16, \
  22                 .dst_info.psize = STEDMA40_PSIZE_LOG_16, \
  23         }
  24
  25 #define MUSB_DMA40_TX_CH { \
  26                 .mode = STEDMA40_MODE_LOGICAL, \
  27                 .dir = STEDMA40_MEM_TO_PERIPH, \
  28                 .src_dev_type = STEDMA40_DEV_SRC_MEMORY, \
  29                 .src_info.data_width = STEDMA40_WORD_WIDTH, \
  30                 .dst_info.data_width = STEDMA40_WORD_WIDTH, \
  31                 .src_info.psize = STEDMA40_PSIZE_LOG_16, \
  32                 .dst_info.psize = STEDMA40_PSIZE_LOG_16, \
  33         }
  34
  35 static struct stedma40_chan_cfg musb_dma_rx_ch[UX500_MUSB_DMA_NUM_RX_CHANNELS]
  36         = {
  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         MUSB_DMA40_RX_CH
  45 };
  46
  47 static struct stedma40_chan_cfg musb_dma_tx_ch[UX500_MUSB_DMA_NUM_TX_CHANNELS]
  48         = {
  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         MUSB_DMA40_TX_CH,
  57 };
  58
  59 static void *ux500_dma_rx_param_array[UX500_MUSB_DMA_NUM_RX_CHANNELS] = {
  60         &musb_dma_rx_ch[0],
  61         &musb_dma_rx_ch[1],
  62         &musb_dma_rx_ch[2],
  63         &musb_dma_rx_ch[3],
  64         &musb_dma_rx_ch[4],
  65         &musb_dma_rx_ch[5],
  66         &musb_dma_rx_ch[6],
  67         &musb_dma_rx_ch[7]
  68 };
  69
  70 static void *ux500_dma_tx_param_array[UX500_MUSB_DMA_NUM_TX_CHANNELS] = {
  71         &musb_dma_tx_ch[0],
  72         &musb_dma_tx_ch[1],
  73         &musb_dma_tx_ch[2],
  74         &musb_dma_tx_ch[3],
  75         &musb_dma_tx_ch[4],
  76         &musb_dma_tx_ch[5],
  77         &musb_dma_tx_ch[6],
  78         &musb_dma_tx_ch[7]
  79 };
  80
  81 static struct ux500_musb_board_data musb_board_data = {
  82         .dma_rx_param_array = ux500_dma_rx_param_array,
  83         .dma_tx_param_array = ux500_dma_tx_param_array,
  84         .num_rx_channels = UX500_MUSB_DMA_NUM_RX_CHANNELS,
  85         .num_tx_channels = UX500_MUSB_DMA_NUM_TX_CHANNELS,
  86         .dma_filter = stedma40_filter,
  87 };
  88
  89 static u64 ux500_musb_dmamask = DMA_BIT_MASK(32);
  90
  91 static struct musb_hdrc_config musb_hdrc_config = {
  92         .multipoint     = true,
  93         .dyn_fifo       = true,
  94         .num_eps        = 16,
  95         .ram_bits       = 16,
  96 };
  97
  98 static struct musb_hdrc_platform_data musb_platform_data = {
  99         .mode = MUSB_OTG,
 100         .config = &musb_hdrc_config,
 101         .board_data = &musb_board_data,
 102 };
 103
 104 static struct resource usb_resources[] = {
 105         [0] = {
 106                 .name   = "usb-mem",
 107                 .flags  =  IORESOURCE_MEM,
 108         },
 109
 110         [1] = {
 111                 .name   = "mc", /* hard-coded in musb */
 112                 .flags  = IORESOURCE_IRQ,
 113         },
 114 };
 115
 116 struct platform_device ux500_musb_device = {
 117         .name = "musb-ux500",
 118         .id = 0,
 119         .dev = {
 120                 .platform_data = &musb_platform_data,
 121                 .dma_mask = &ux500_musb_dmamask,
 122                 .coherent_dma_mask = DMA_BIT_MASK(32),
 123         },
 124         .num_resources = ARRAY_SIZE(usb_resources),
 125         .resource = usb_resources,
 126 };
 127
 128 static inline void ux500_usb_dma_update_rx_ch_config(int *src_dev_type)
 129 {
 130         u32 idx;
 131
 132         for (idx = 0; idx < UX500_MUSB_DMA_NUM_RX_CHANNELS; idx++)
 133                 musb_dma_rx_ch[idx].src_dev_type = src_dev_type[idx];
 134 }
 135
 136 static inline void ux500_usb_dma_update_tx_ch_config(int *dst_dev_type)
 137 {
 138         u32 idx;
 139
 140         for (idx = 0; idx < UX500_MUSB_DMA_NUM_TX_CHANNELS; idx++)
 141                 musb_dma_tx_ch[idx].dst_dev_type = dst_dev_type[idx];
 142 }
 143
 144 void ux500_add_usb(struct device *parent, resource_size_t base, int irq,
 145                    int *dma_rx_cfg, int *dma_tx_cfg)
 146 {
 147         ux500_musb_device.resource[0].start = base;
 148         ux500_musb_device.resource[0].end = base + SZ_64K - 1;
 149         ux500_musb_device.resource[1].start = irq;
 150         ux500_musb_device.resource[1].end = irq;
 151
 152         ux500_usb_dma_update_rx_ch_config(dma_rx_cfg);
 153         ux500_usb_dma_update_tx_ch_config(dma_tx_cfg);
 154
 155         ux500_musb_device.dev.parent = parent;
 156
 157         platform_device_register(&ux500_musb_device);
 158 }