/*
* @file hv_drv_UsbMusbHsDma.h
* @brief Header of MUSB OTG driver - support for Mentor's DMA controller.
*
* @author HiView SoC Software Team
* @version 1.0.0
* @date 2022-06-15
*/

#ifndef __HV_DRV_USB_MUSB_HS_DMA_H_
#define __HV_DRV_USB_MUSB_HS_DMA_H_

#define MUSB_HSDMA_BASE        0x200
#define MUSB_HSDMA_INTR        (MUSB_HSDMA_BASE + 0)
#define MUSB_HSDMA_CONTROL     0x4
#define MUSB_HSDMA_ADDRESS     0x8
#define MUSB_HSDMA_COUNT       0xc

#define MUSB_HSDMA_CHANNEL_OFFSET(_bchannel, _offset)        \
        (MUSB_HSDMA_BASE + (_bchannel << 4) + _offset)

#define musb_read_hsdma_addr(mbase, bchannel)    \
    musb_readl(mbase,    \
           MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_ADDRESS))

#define musb_write_hsdma_addr(mbase, bchannel, addr) \
    musb_writel(mbase, \
            MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_ADDRESS), \
            addr)

#define musb_read_hsdma_count(mbase, bchannel)    \
    musb_readl(mbase,    \
           MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_COUNT))

#define musb_write_hsdma_count(mbase, bchannel, len) \
    musb_writel(mbase, \
            MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_COUNT), \
            len)


/* control register (16-bit): */
#define MUSB_HSDMA_ENABLE_SHIFT         0
#define MUSB_HSDMA_TRANSMIT_SHIFT       1
#define MUSB_HSDMA_MODE1_SHIFT          2
#define MUSB_HSDMA_IRQENABLE_SHIFT      3
#define MUSB_HSDMA_ENDPOINT_SHIFT       4
#define MUSB_HSDMA_BUSERROR_SHIFT       8
#define MUSB_HSDMA_BURSTMODE_SHIFT      9
#define MUSB_HSDMA_BURSTMODE            (3 << MUSB_HSDMA_BURSTMODE_SHIFT)
#define MUSB_HSDMA_BURSTMODE_UNSPEC     0
#define MUSB_HSDMA_BURSTMODE_INCR4      1
#define MUSB_HSDMA_BURSTMODE_INCR8      2
#define MUSB_HSDMA_BURSTMODE_INCR16     3

#define MUSB_HSDMA_CHANNELS             8

struct musb_dma_controller;

struct musb_dma_channel {
    struct dma_channel              channel;
    struct musb_dma_controller      *controller;
    u32               start_addr;
    u32               len;
    u16               max_packet_sz;
    u8                idx;
    u8                epnum;
    u8                transmit;
};

struct musb_dma_controller {
    struct dma_controller        controller;
    struct musb_dma_channel      channel[MUSB_HSDMA_CHANNELS];
    void             *private_data;
    void             *base;
    u8               channel_count;
    u8               used_channels;
    int              irq;
};

irqreturn_t dma_controller_irq(int irq, void *private_data);

#endif