usb.c

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/*
 * Copyright (C) ST-Ericsson SA 2011
 *
 * Author: Mian Yousaf Kaukab <[email protected]>
 * License terms: GNU General Public License (GPL) version 2
 */
#include <linux/platform_device.h>
#include <linux/usb/musb.h>
#include <linux/dma-mapping.h>

#include <plat/ste_dma40.h>
#include <mach/hardware.h>
#include <linux/platform_data/usb-musb-ux500.h>

#define MUSB_DMA40_RX_CH { \
        .mode = STEDMA40_MODE_LOGICAL, \
        .dir = STEDMA40_PERIPH_TO_MEM, \
        .dst_dev_type = STEDMA40_DEV_DST_MEMORY, \
        .src_info.data_width = STEDMA40_WORD_WIDTH, \
        .dst_info.data_width = STEDMA40_WORD_WIDTH, \
        .src_info.psize = STEDMA40_PSIZE_LOG_16, \
        .dst_info.psize = STEDMA40_PSIZE_LOG_16, \
    }

#define MUSB_DMA40_TX_CH { \
        .mode = STEDMA40_MODE_LOGICAL, \
        .dir = STEDMA40_MEM_TO_PERIPH, \
        .src_dev_type = STEDMA40_DEV_SRC_MEMORY, \
        .src_info.data_width = STEDMA40_WORD_WIDTH, \
        .dst_info.data_width = STEDMA40_WORD_WIDTH, \
        .src_info.psize = STEDMA40_PSIZE_LOG_16, \
        .dst_info.psize = STEDMA40_PSIZE_LOG_16, \
    }

static struct stedma40_chan_cfg musb_dma_rx_ch[UX500_MUSB_DMA_NUM_RX_CHANNELS]
    = {
    MUSB_DMA40_RX_CH,
    MUSB_DMA40_RX_CH,
    MUSB_DMA40_RX_CH,
    MUSB_DMA40_RX_CH,
    MUSB_DMA40_RX_CH,
    MUSB_DMA40_RX_CH,
    MUSB_DMA40_RX_CH,
    MUSB_DMA40_RX_CH
};

static struct stedma40_chan_cfg musb_dma_tx_ch[UX500_MUSB_DMA_NUM_TX_CHANNELS]
    = {
    MUSB_DMA40_TX_CH,
    MUSB_DMA40_TX_CH,
    MUSB_DMA40_TX_CH,
    MUSB_DMA40_TX_CH,
    MUSB_DMA40_TX_CH,
    MUSB_DMA40_TX_CH,
    MUSB_DMA40_TX_CH,
    MUSB_DMA40_TX_CH,
};

static void *ux500_dma_rx_param_array[UX500_MUSB_DMA_NUM_RX_CHANNELS] = {
    &musb_dma_rx_ch[0],
    &musb_dma_rx_ch[1],
    &musb_dma_rx_ch[2],
    &musb_dma_rx_ch[3],
    &musb_dma_rx_ch[4],
    &musb_dma_rx_ch[5],
    &musb_dma_rx_ch[6],
    &musb_dma_rx_ch[7]
};

static void *ux500_dma_tx_param_array[UX500_MUSB_DMA_NUM_TX_CHANNELS] = {
    &musb_dma_tx_ch[0],
    &musb_dma_tx_ch[1],
    &musb_dma_tx_ch[2],
    &musb_dma_tx_ch[3],
    &musb_dma_tx_ch[4],
    &musb_dma_tx_ch[5],
    &musb_dma_tx_ch[6],
    &musb_dma_tx_ch[7]
};

static struct ux500_musb_board_data musb_board_data = {
    .dma_rx_param_array = ux500_dma_rx_param_array,
    .dma_tx_param_array = ux500_dma_tx_param_array,
    .num_rx_channels = UX500_MUSB_DMA_NUM_RX_CHANNELS,
    .num_tx_channels = UX500_MUSB_DMA_NUM_TX_CHANNELS,
    .dma_filter = stedma40_filter,
};

static u64 ux500_musb_dmamask = DMA_BIT_MASK(32);

static struct musb_hdrc_config musb_hdrc_config = {
    .multipoint = true,
    .dyn_fifo   = true,
    .num_eps    = 16,
    .ram_bits   = 16,
};

static struct musb_hdrc_platform_data musb_platform_data = {
    .mode = MUSB_OTG,
    .config = &musb_hdrc_config,
    .board_data = &musb_board_data,
};

static struct resource usb_resources[] = {
    [0] = {
        .name   = "usb-mem",
        .flags  =  IORESOURCE_MEM,
    },

    [1] = {
        .name   = "mc", /* hard-coded in musb */
        .flags  = IORESOURCE_IRQ,
    },
};

struct platform_device ux500_musb_device = {
    .name = "musb-ux500",
    .id = 0,
    .dev = {
        .platform_data = &musb_platform_data,
        .dma_mask = &ux500_musb_dmamask,
        .coherent_dma_mask = DMA_BIT_MASK(32),
    },
    .num_resources = ARRAY_SIZE(usb_resources),
    .resource = usb_resources,
};

static inline void ux500_usb_dma_update_rx_ch_config(int *src_dev_type)
{
    u32 idx;

    for (idx = 0; idx < UX500_MUSB_DMA_NUM_RX_CHANNELS; idx++)
        musb_dma_rx_ch[idx].src_dev_type = src_dev_type[idx];
}

static inline void ux500_usb_dma_update_tx_ch_config(int *dst_dev_type)
{
    u32 idx;

    for (idx = 0; idx < UX500_MUSB_DMA_NUM_TX_CHANNELS; idx++)
        musb_dma_tx_ch[idx].dst_dev_type = dst_dev_type[idx];
}

void ux500_add_usb(struct device *parent, resource_size_t base, int irq,
           int *dma_rx_cfg, int *dma_tx_cfg)
{
    ux500_musb_device.resource[0].start = base;
    ux500_musb_device.resource[0].end = base + SZ_64K - 1;
    ux500_musb_device.resource[1].start = irq;
    ux500_musb_device.resource[1].end = irq;

    ux500_usb_dma_update_rx_ch_config(dma_rx_cfg);
    ux500_usb_dma_update_tx_ch_config(dma_tx_cfg);

    ux500_musb_device.dev.parent = parent;

    platform_device_register(&ux500_musb_device);
}