/*
 * Renesas USB
 *
 * Copyright (C) 2011 Renesas Solutions Corp.
 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 */
#ifndef RENESAS_USB_H
#define RENESAS_USB_H
#include <linux/platform_device.h>
#include <linux/usb/ch9.h>

/*
 * module type
 *
 * it will be return value from get_id
 */
enum {
        USBHS_HOST = 0,
        USBHS_GADGET,
        USBHS_MAX,
};

/*
 * callback functions table for driver
 *
 * These functions are called from platform for driver.
 * Callback function's pointer will be set before
 * renesas_usbhs_platform_callback :: hardware_init was called
 */
struct renesas_usbhs_driver_callback {
        int (*notify_hotplug)(struct platform_device *pdev);
};

/*
 * callback functions for platform
 *
 * These functions are called from driver for platform
 */
struct renesas_usbhs_platform_callback {

        /*
         * option:
         *
         * Hardware init function for platform.
         * it is called when driver was probed.
         */
        int (*hardware_init)(struct platform_device *pdev);

        /*
         * option:
         *
         * Hardware exit function for platform.
         * it is called when driver was removed
         */
        int (*hardware_exit)(struct platform_device *pdev);

        /*
         * option:
         *
         * for board specific clock control
         */
        int (*power_ctrl)(struct platform_device *pdev,
                           void __iomem *base, int enable);

        /*
         * option:
         *
         * Phy reset for platform
         */
        int (*phy_reset)(struct platform_device *pdev);

        /*
         * get USB ID function
         *  - USBHS_HOST
         *  - USBHS_GADGET
         */
        int (*get_id)(struct platform_device *pdev);

        /*
         * get VBUS status function.
         */
        int (*get_vbus)(struct platform_device *pdev);

        /*
         * option:
         *
         * VBUS control is needed for Host
         */
        int (*set_vbus)(struct platform_device *pdev, int enable);
};

/*
 * parameters for renesas usbhs
 *
 * some register needs USB chip specific parameters.
 * This struct show it to driver
 */

struct renesas_usbhs_driver_pipe_config {
        u8 type;        /* USB_ENDPOINT_XFER_xxx */
        u16 bufsize;
        u8 bufnum;
        bool double_buf;
};
#define RENESAS_USBHS_PIPE(_type, _size, _num, _double_buf)     {       \
                        .type = (_type),                \
                        .bufsize = (_size),             \
                        .bufnum = (_num),               \
                        .double_buf = (_double_buf),    \
        }

struct renesas_usbhs_driver_param {
        /*
         * pipe settings
         */
        struct renesas_usbhs_driver_pipe_config *pipe_configs;
        int pipe_size; /* pipe_configs array size */

        /*
         * option:
         *
         * for BUSWAIT :: BWAIT
         * see
         *      renesas_usbhs/common.c :: usbhsc_set_buswait()
         * */
        int buswait_bwait;

        /*
         * option:
         *
         * delay time from notify_hotplug callback
         */
        int detection_delay; /* msec */

        /*
         * option:
         *
         * dma id for dmaengine
         * The data transfer direction on D0FIFO/D1FIFO should be
         * fixed for keeping consistency.
         * So, the platform id settings will be..
         *      .d0_tx_id = xx_TX,
         *      .d1_rx_id = xx_RX,
         * or
         *      .d1_tx_id = xx_TX,
         *      .d0_rx_id = xx_RX,
         */
        int d0_tx_id;
        int d0_rx_id;
        int d1_tx_id;
        int d1_rx_id;
        int d2_tx_id;
        int d2_rx_id;
        int d3_tx_id;
        int d3_rx_id;

        /*
         * option:
         *
         * pio <--> dma border.
         */
        int pio_dma_border; /* default is 64byte */

        uintptr_t type;
        u32 enable_gpio;

        /*
         * option:
         */
        u32 has_otg:1; /* for controlling PWEN/EXTLP */
        u32 has_sudmac:1; /* for SUDMAC */
        u32 has_usb_dmac:1; /* for USB-DMAC */
#define USBHS_USB_DMAC_XFER_SIZE        32      /* hardcode the xfer size */
};

#define USBHS_TYPE_RCAR_GEN2    1
#define USBHS_TYPE_RCAR_GEN3    2

/*
 * option:
 *
 * platform information for renesas_usbhs driver.
 */
struct renesas_usbhs_platform_info {
        /*
         * option:
         *
         * platform set these functions before
         * call platform_add_devices if needed
         */
        struct renesas_usbhs_platform_callback  platform_callback;

        /*
         * driver set these callback functions pointer.
         * platform can use it on callback functions
         */
        struct renesas_usbhs_driver_callback    driver_callback;

        /*
         * option:
         *
         * driver use these param for some register
         */
        struct renesas_usbhs_driver_param       driver_param;
};

/*
 * macro for platform
 */
#define renesas_usbhs_get_info(pdev)\
        ((struct renesas_usbhs_platform_info *)(pdev)->dev.platform_data)

#define renesas_usbhs_call_notify_hotplug(pdev)                         \
        ({                                                              \
                struct renesas_usbhs_driver_callback *dc;               \
                dc = &(renesas_usbhs_get_info(pdev)->driver_callback);  \
                if (dc && dc->notify_hotplug)                           \
                        dc->notify_hotplug(pdev);                       \
        })
#endif /* RENESAS_USB_H */