/*
 * amd5536.h -- header for AMD 5536 UDC high/full speed USB device controller
 *
 * Copyright (C) 2007 AMD (http://www.amd.com)
 * Author: Thomas Dahlmann
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */

#ifndef AMD5536UDC_H
#define AMD5536UDC_H

/* various constants */
#define UDC_RDE_TIMER_SECONDS           1
#define UDC_RDE_TIMER_DIV               10
#define UDC_POLLSTALL_TIMER_USECONDS    500

/* Hs AMD5536 chip rev. */
#define UDC_HSA0_REV 1
#define UDC_HSB1_REV 2

/*
 * SETUP usb commands
 * needed, because some SETUP's are handled in hw, but must be passed to
 * gadget driver above
 * SET_CONFIG
 */
#define UDC_SETCONFIG_DWORD0                    0x00000900
#define UDC_SETCONFIG_DWORD0_VALUE_MASK         0xffff0000
#define UDC_SETCONFIG_DWORD0_VALUE_OFS          16

#define UDC_SETCONFIG_DWORD1                    0x00000000

/* SET_INTERFACE */
#define UDC_SETINTF_DWORD0                      0x00000b00
#define UDC_SETINTF_DWORD0_ALT_MASK             0xffff0000
#define UDC_SETINTF_DWORD0_ALT_OFS              16

#define UDC_SETINTF_DWORD1                      0x00000000
#define UDC_SETINTF_DWORD1_INTF_MASK            0x0000ffff
#define UDC_SETINTF_DWORD1_INTF_OFS             0

/* Mass storage reset */
#define UDC_MSCRES_DWORD0                       0x0000ff21
#define UDC_MSCRES_DWORD1                       0x00000000

/* Global CSR's -------------------------------------------------------------*/
#define UDC_CSR_ADDR                            0x500

/* EP NE bits */
/* EP number */
#define UDC_CSR_NE_NUM_MASK                     0x0000000f
#define UDC_CSR_NE_NUM_OFS                      0
/* EP direction */
#define UDC_CSR_NE_DIR_MASK                     0x00000010
#define UDC_CSR_NE_DIR_OFS                      4
/* EP type */
#define UDC_CSR_NE_TYPE_MASK                    0x00000060
#define UDC_CSR_NE_TYPE_OFS                     5
/* EP config number */
#define UDC_CSR_NE_CFG_MASK                     0x00000780
#define UDC_CSR_NE_CFG_OFS                      7
/* EP interface number */
#define UDC_CSR_NE_INTF_MASK                    0x00007800
#define UDC_CSR_NE_INTF_OFS                     11
/* EP alt setting */
#define UDC_CSR_NE_ALT_MASK                     0x00078000
#define UDC_CSR_NE_ALT_OFS                      15

/* max pkt */
#define UDC_CSR_NE_MAX_PKT_MASK                 0x3ff80000
#define UDC_CSR_NE_MAX_PKT_OFS                  19

/* Device Config Register ---------------------------------------------------*/
#define UDC_DEVCFG_ADDR                         0x400

#define UDC_DEVCFG_SOFTRESET                    31
#define UDC_DEVCFG_HNPSFEN                      30
#define UDC_DEVCFG_DMARST                       29
#define UDC_DEVCFG_SET_DESC                     18
#define UDC_DEVCFG_CSR_PRG                      17
#define UDC_DEVCFG_STATUS                       7
#define UDC_DEVCFG_DIR                          6
#define UDC_DEVCFG_PI                           5
#define UDC_DEVCFG_SS                           4
#define UDC_DEVCFG_SP                           3
#define UDC_DEVCFG_RWKP                         2

#define UDC_DEVCFG_SPD_MASK                     0x3
#define UDC_DEVCFG_SPD_OFS                      0
#define UDC_DEVCFG_SPD_HS                       0x0
#define UDC_DEVCFG_SPD_FS                       0x1
#define UDC_DEVCFG_SPD_LS                       0x2
/*#define UDC_DEVCFG_SPD_FS                     0x3*/


/* Device Control Register --------------------------------------------------*/
#define UDC_DEVCTL_ADDR                         0x404

#define UDC_DEVCTL_THLEN_MASK                   0xff000000
#define UDC_DEVCTL_THLEN_OFS                    24

#define UDC_DEVCTL_BRLEN_MASK                   0x00ff0000
#define UDC_DEVCTL_BRLEN_OFS                    16

#define UDC_DEVCTL_CSR_DONE                     13
#define UDC_DEVCTL_DEVNAK                       12
#define UDC_DEVCTL_SD                           10
#define UDC_DEVCTL_MODE                         9
#define UDC_DEVCTL_BREN                         8
#define UDC_DEVCTL_THE                          7
#define UDC_DEVCTL_BF                           6
#define UDC_DEVCTL_BE                           5
#define UDC_DEVCTL_DU                           4
#define UDC_DEVCTL_TDE                          3
#define UDC_DEVCTL_RDE                          2
#define UDC_DEVCTL_RES                          0


/* Device Status Register ---------------------------------------------------*/
#define UDC_DEVSTS_ADDR                         0x408

#define UDC_DEVSTS_TS_MASK                      0xfffc0000
#define UDC_DEVSTS_TS_OFS                       18

#define UDC_DEVSTS_SESSVLD                      17
#define UDC_DEVSTS_PHY_ERROR                    16
#define UDC_DEVSTS_RXFIFO_EMPTY                 15

#define UDC_DEVSTS_ENUM_SPEED_MASK              0x00006000
#define UDC_DEVSTS_ENUM_SPEED_OFS               13
#define UDC_DEVSTS_ENUM_SPEED_FULL              1
#define UDC_DEVSTS_ENUM_SPEED_HIGH              0

#define UDC_DEVSTS_SUSP                         12

#define UDC_DEVSTS_ALT_MASK                     0x00000f00
#define UDC_DEVSTS_ALT_OFS                      8

#define UDC_DEVSTS_INTF_MASK                    0x000000f0
#define UDC_DEVSTS_INTF_OFS                     4

#define UDC_DEVSTS_CFG_MASK                     0x0000000f
#define UDC_DEVSTS_CFG_OFS                      0


/* Device Interrupt Register ------------------------------------------------*/
#define UDC_DEVINT_ADDR                         0x40c

#define UDC_DEVINT_SVC                          7
#define UDC_DEVINT_ENUM                         6
#define UDC_DEVINT_SOF                          5
#define UDC_DEVINT_US                           4
#define UDC_DEVINT_UR                           3
#define UDC_DEVINT_ES                           2
#define UDC_DEVINT_SI                           1
#define UDC_DEVINT_SC                           0

/* Device Interrupt Mask Register -------------------------------------------*/
#define UDC_DEVINT_MSK_ADDR                     0x410

#define UDC_DEVINT_MSK                          0x7f

/* Endpoint Interrupt Register ----------------------------------------------*/
#define UDC_EPINT_ADDR                          0x414

#define UDC_EPINT_OUT_MASK                      0xffff0000
#define UDC_EPINT_OUT_OFS                       16
#define UDC_EPINT_IN_MASK                       0x0000ffff
#define UDC_EPINT_IN_OFS                        0

#define UDC_EPINT_IN_EP0                        0
#define UDC_EPINT_IN_EP1                        1
#define UDC_EPINT_IN_EP2                        2
#define UDC_EPINT_IN_EP3                        3
#define UDC_EPINT_OUT_EP0                       16
#define UDC_EPINT_OUT_EP1                       17
#define UDC_EPINT_OUT_EP2                       18
#define UDC_EPINT_OUT_EP3                       19

#define UDC_EPINT_EP0_ENABLE_MSK                0x001e001e

/* Endpoint Interrupt Mask Register -----------------------------------------*/
#define UDC_EPINT_MSK_ADDR                      0x418

#define UDC_EPINT_OUT_MSK_MASK                  0xffff0000
#define UDC_EPINT_OUT_MSK_OFS                   16
#define UDC_EPINT_IN_MSK_MASK                   0x0000ffff
#define UDC_EPINT_IN_MSK_OFS                    0

#define UDC_EPINT_MSK_DISABLE_ALL               0xffffffff
/* mask non-EP0 endpoints */
#define UDC_EPDATAINT_MSK_DISABLE               0xfffefffe
/* mask all dev interrupts */
#define UDC_DEV_MSK_DISABLE                     0x7f

/* Endpoint-specific CSR's --------------------------------------------------*/
#define UDC_EPREGS_ADDR                         0x0
#define UDC_EPIN_REGS_ADDR                      0x0
#define UDC_EPOUT_REGS_ADDR                     0x200

#define UDC_EPCTL_ADDR                          0x0

#define UDC_EPCTL_RRDY                          9
#define UDC_EPCTL_CNAK                          8
#define UDC_EPCTL_SNAK                          7
#define UDC_EPCTL_NAK                           6

#define UDC_EPCTL_ET_MASK                       0x00000030
#define UDC_EPCTL_ET_OFS                        4
#define UDC_EPCTL_ET_CONTROL                    0
#define UDC_EPCTL_ET_ISO                        1
#define UDC_EPCTL_ET_BULK                       2
#define UDC_EPCTL_ET_INTERRUPT                  3

#define UDC_EPCTL_P                             3
#define UDC_EPCTL_SN                            2
#define UDC_EPCTL_F                             1
#define UDC_EPCTL_S                             0

/* Endpoint Status Registers ------------------------------------------------*/
#define UDC_EPSTS_ADDR                          0x4

#define UDC_EPSTS_RX_PKT_SIZE_MASK              0x007ff800
#define UDC_EPSTS_RX_PKT_SIZE_OFS               11

#define UDC_EPSTS_TDC                           10
#define UDC_EPSTS_HE                            9
#define UDC_EPSTS_BNA                           7
#define UDC_EPSTS_IN                            6

#define UDC_EPSTS_OUT_MASK                      0x00000030
#define UDC_EPSTS_OUT_OFS                       4
#define UDC_EPSTS_OUT_DATA                      1
#define UDC_EPSTS_OUT_DATA_CLEAR                0x10
#define UDC_EPSTS_OUT_SETUP                     2
#define UDC_EPSTS_OUT_SETUP_CLEAR               0x20
#define UDC_EPSTS_OUT_CLEAR                     0x30

/* Endpoint Buffer Size IN/ Receive Packet Frame Number OUT Registers ------*/
#define UDC_EPIN_BUFF_SIZE_ADDR                 0x8
#define UDC_EPOUT_FRAME_NUMBER_ADDR             0x8

#define UDC_EPIN_BUFF_SIZE_MASK                 0x0000ffff
#define UDC_EPIN_BUFF_SIZE_OFS                  0
/* EP0in txfifo = 128 bytes*/
#define UDC_EPIN0_BUFF_SIZE                     32
/* EP0in fullspeed txfifo = 128 bytes*/
#define UDC_FS_EPIN0_BUFF_SIZE                  32

/* fifo size mult = fifo size / max packet */
#define UDC_EPIN_BUFF_SIZE_MULT                 2

/* EPin data fifo size = 1024 bytes DOUBLE BUFFERING */
#define UDC_EPIN_BUFF_SIZE                      256
/* EPin small INT data fifo size = 128 bytes */
#define UDC_EPIN_SMALLINT_BUFF_SIZE             32

/* EPin fullspeed data fifo size = 128 bytes DOUBLE BUFFERING */
#define UDC_FS_EPIN_BUFF_SIZE                   32

#define UDC_EPOUT_FRAME_NUMBER_MASK             0x0000ffff
#define UDC_EPOUT_FRAME_NUMBER_OFS              0

/* Endpoint Buffer Size OUT/Max Packet Size Registers -----------------------*/
#define UDC_EPOUT_BUFF_SIZE_ADDR                0x0c
#define UDC_EP_MAX_PKT_SIZE_ADDR                0x0c

#define UDC_EPOUT_BUFF_SIZE_MASK                0xffff0000
#define UDC_EPOUT_BUFF_SIZE_OFS                 16
#define UDC_EP_MAX_PKT_SIZE_MASK                0x0000ffff
#define UDC_EP_MAX_PKT_SIZE_OFS                 0
/* EP0in max packet size = 64 bytes */
#define UDC_EP0IN_MAX_PKT_SIZE                  64
/* EP0out max packet size = 64 bytes */
#define UDC_EP0OUT_MAX_PKT_SIZE                 64
/* EP0in fullspeed max packet size = 64 bytes */
#define UDC_FS_EP0IN_MAX_PKT_SIZE               64
/* EP0out fullspeed max packet size = 64 bytes */
#define UDC_FS_EP0OUT_MAX_PKT_SIZE              64

/*
 * Endpoint dma descriptors ------------------------------------------------
 *
 * Setup data, Status dword
 */
#define UDC_DMA_STP_STS_CFG_MASK                0x0fff0000
#define UDC_DMA_STP_STS_CFG_OFS                 16
#define UDC_DMA_STP_STS_CFG_ALT_MASK            0x000f0000
#define UDC_DMA_STP_STS_CFG_ALT_OFS             16
#define UDC_DMA_STP_STS_CFG_INTF_MASK           0x00f00000
#define UDC_DMA_STP_STS_CFG_INTF_OFS            20
#define UDC_DMA_STP_STS_CFG_NUM_MASK            0x0f000000
#define UDC_DMA_STP_STS_CFG_NUM_OFS             24
#define UDC_DMA_STP_STS_RX_MASK                 0x30000000
#define UDC_DMA_STP_STS_RX_OFS                  28
#define UDC_DMA_STP_STS_BS_MASK                 0xc0000000
#define UDC_DMA_STP_STS_BS_OFS                  30
#define UDC_DMA_STP_STS_BS_HOST_READY           0
#define UDC_DMA_STP_STS_BS_DMA_BUSY             1
#define UDC_DMA_STP_STS_BS_DMA_DONE             2
#define UDC_DMA_STP_STS_BS_HOST_BUSY            3
/* IN data, Status dword */
#define UDC_DMA_IN_STS_TXBYTES_MASK             0x0000ffff
#define UDC_DMA_IN_STS_TXBYTES_OFS              0
#define UDC_DMA_IN_STS_FRAMENUM_MASK            0x07ff0000
#define UDC_DMA_IN_STS_FRAMENUM_OFS             0
#define UDC_DMA_IN_STS_L                        27
#define UDC_DMA_IN_STS_TX_MASK                  0x30000000
#define UDC_DMA_IN_STS_TX_OFS                   28
#define UDC_DMA_IN_STS_BS_MASK                  0xc0000000
#define UDC_DMA_IN_STS_BS_OFS                   30
#define UDC_DMA_IN_STS_BS_HOST_READY            0
#define UDC_DMA_IN_STS_BS_DMA_BUSY              1
#define UDC_DMA_IN_STS_BS_DMA_DONE              2
#define UDC_DMA_IN_STS_BS_HOST_BUSY             3
/* OUT data, Status dword */
#define UDC_DMA_OUT_STS_RXBYTES_MASK            0x0000ffff
#define UDC_DMA_OUT_STS_RXBYTES_OFS             0
#define UDC_DMA_OUT_STS_FRAMENUM_MASK           0x07ff0000
#define UDC_DMA_OUT_STS_FRAMENUM_OFS            0
#define UDC_DMA_OUT_STS_L                       27
#define UDC_DMA_OUT_STS_RX_MASK                 0x30000000
#define UDC_DMA_OUT_STS_RX_OFS                  28
#define UDC_DMA_OUT_STS_BS_MASK                 0xc0000000
#define UDC_DMA_OUT_STS_BS_OFS                  30
#define UDC_DMA_OUT_STS_BS_HOST_READY           0
#define UDC_DMA_OUT_STS_BS_DMA_BUSY             1
#define UDC_DMA_OUT_STS_BS_DMA_DONE             2
#define UDC_DMA_OUT_STS_BS_HOST_BUSY            3
/* max ep0in packet */
#define UDC_EP0IN_MAXPACKET                     1000
/* max dma packet */
#define UDC_DMA_MAXPACKET                       65536

/* un-usable DMA address */
#define DMA_DONT_USE                            (~(dma_addr_t) 0 )

/* other Endpoint register addresses and values-----------------------------*/
#define UDC_EP_SUBPTR_ADDR                      0x10
#define UDC_EP_DESPTR_ADDR                      0x14
#define UDC_EP_WRITE_CONFIRM_ADDR               0x1c

/* EP number as layouted in AHB space */
#define UDC_EP_NUM                              32
#define UDC_EPIN_NUM                            16
#define UDC_EPIN_NUM_USED                       5
#define UDC_EPOUT_NUM                           16
/* EP number of EP's really used = EP0 + 8 data EP's */
#define UDC_USED_EP_NUM                         9
/* UDC CSR regs are aligned but AHB regs not - offset for OUT EP's */
#define UDC_CSR_EP_OUT_IX_OFS                   12

#define UDC_EP0OUT_IX                           16
#define UDC_EP0IN_IX                            0

/* Rx fifo address and size = 1k -------------------------------------------*/
#define UDC_RXFIFO_ADDR                         0x800
#define UDC_RXFIFO_SIZE                         0x400

/* Tx fifo address and size = 1.5k -----------------------------------------*/
#define UDC_TXFIFO_ADDR                         0xc00
#define UDC_TXFIFO_SIZE                         0x600

/* default data endpoints --------------------------------------------------*/
#define UDC_EPIN_STATUS_IX                      1
#define UDC_EPIN_IX                             2
#define UDC_EPOUT_IX                            18

/* general constants -------------------------------------------------------*/
#define UDC_DWORD_BYTES                         4
#define UDC_BITS_PER_BYTE_SHIFT                 3
#define UDC_BYTE_MASK                           0xff
#define UDC_BITS_PER_BYTE                       8

/*---------------------------------------------------------------------------*/
/* UDC CSR's */
struct udc_csrs {

        /* sca - setup command address */
        u32 sca;

        /* ep ne's */
        u32 ne[UDC_USED_EP_NUM];
} __attribute__ ((packed));

/* AHB subsystem CSR registers */
struct udc_regs {

        /* device configuration */
        u32 cfg;

        /* device control */
        u32 ctl;

        /* device status */
        u32 sts;

        /* device interrupt */
        u32 irqsts;

        /* device interrupt mask */
        u32 irqmsk;

        /* endpoint interrupt */
        u32 ep_irqsts;

        /* endpoint interrupt mask */
        u32 ep_irqmsk;
} __attribute__ ((packed));

/* endpoint specific registers */
struct udc_ep_regs {

        /* endpoint control */
        u32 ctl;

        /* endpoint status */
        u32 sts;

        /* endpoint buffer size in/ receive packet frame number out */
        u32 bufin_framenum;

        /* endpoint buffer size out/max packet size */
        u32 bufout_maxpkt;

        /* endpoint setup buffer pointer */
        u32 subptr;

        /* endpoint data descriptor pointer */
        u32 desptr;

        /* reserverd */
        u32 reserved;

        /* write/read confirmation */
        u32 confirm;

} __attribute__ ((packed));

/* control data DMA desc */
struct udc_stp_dma {
        /* status quadlet */
        u32     status;
        /* reserved */
        u32     _reserved;
        /* first setup word */
        u32     data12;
        /* second setup word */
        u32     data34;
} __attribute__ ((aligned (16)));

/* normal data DMA desc */
struct udc_data_dma {
        /* status quadlet */
        u32     status;
        /* reserved */
        u32     _reserved;
        /* buffer pointer */
        u32     bufptr;
        /* next descriptor pointer */
        u32     next;
} __attribute__ ((aligned (16)));

/* request packet */
struct udc_request {
        /* embedded gadget ep */
        struct usb_request              req;

        /* flags */
        unsigned                        dma_going : 1,
                                        dma_done : 1;
        /* phys. address */
        dma_addr_t                      td_phys;
        /* first dma desc. of chain */
        struct udc_data_dma             *td_data;
        /* last dma desc. of chain */
        struct udc_data_dma             *td_data_last;
        struct list_head                queue;

        /* chain length */
        unsigned                        chain_len;

};

/* UDC specific endpoint parameters */
struct udc_ep {
        struct usb_ep                   ep;
        struct udc_ep_regs __iomem      *regs;
        u32 __iomem                     *txfifo;
        u32 __iomem                     *dma;
        dma_addr_t                      td_phys;
        dma_addr_t                      td_stp_dma;
        struct udc_stp_dma              *td_stp;
        struct udc_data_dma             *td;
        /* temp request */
        struct udc_request              *req;
        unsigned                        req_used;
        unsigned                        req_completed;
        /* dummy DMA desc for BNA dummy */
        struct udc_request              *bna_dummy_req;
        unsigned                        bna_occurred;

        /* NAK state */
        unsigned                        naking;

        struct udc                      *dev;

        /* queue for requests */
        struct list_head                queue;
        unsigned                        halted;
        unsigned                        cancel_transfer;
        unsigned                        num : 5,
                                        fifo_depth : 14,
                                        in : 1;
};

/* device struct */
struct udc {
        struct usb_gadget               gadget;
        spinlock_t                      lock;   /* protects all state */
        /* all endpoints */
        struct udc_ep                   ep[UDC_EP_NUM];
        struct usb_gadget_driver        *driver;
        /* operational flags */
        unsigned                        active : 1,
                                        stall_ep0in : 1,
                                        waiting_zlp_ack_ep0in : 1,
                                        set_cfg_not_acked : 1,
                                        irq_registered : 1,
                                        data_ep_enabled : 1,
                                        data_ep_queued : 1,
                                        mem_region : 1,
                                        sys_suspended : 1,
                                        connected;

        u16                             chiprev;

        /* registers */
        struct pci_dev                  *pdev;
        struct udc_csrs __iomem         *csr;
        struct udc_regs __iomem         *regs;
        struct udc_ep_regs __iomem      *ep_regs;
        u32 __iomem                     *rxfifo;
        u32 __iomem                     *txfifo;

        /* DMA desc pools */
        struct pci_pool                 *data_requests;
        struct pci_pool                 *stp_requests;

        /* device data */
        unsigned long                   phys_addr;
        void __iomem                    *virt_addr;
        unsigned                        irq;

        /* states */
        u16                             cur_config;
        u16                             cur_intf;
        u16                             cur_alt;
};

#define to_amd5536_udc(g)       (container_of((g), struct udc, gadget))

/* setup request data */
union udc_setup_data {
        u32                     data[2];
        struct usb_ctrlrequest  request;
};

/*
 *---------------------------------------------------------------------------
 * SET and GET bitfields in u32 values
 * via constants for mask/offset:
 * <bit_field_stub_name> is the text between
 * UDC_ and _MASK|_OFS of appropriate
 * constant
 *
 * set bitfield value in u32 u32Val
 */
#define AMD_ADDBITS(u32Val, bitfield_val, bitfield_stub_name)           \
        (((u32Val) & (((u32) ~((u32) bitfield_stub_name##_MASK))))      \
        | (((bitfield_val) << ((u32) bitfield_stub_name##_OFS))         \
                & ((u32) bitfield_stub_name##_MASK)))

/*
 * set bitfield value in zero-initialized u32 u32Val
 * => bitfield bits in u32Val are all zero
 */
#define AMD_INIT_SETBITS(u32Val, bitfield_val, bitfield_stub_name)      \
        ((u32Val)                                                       \
        | (((bitfield_val) << ((u32) bitfield_stub_name##_OFS))         \
                & ((u32) bitfield_stub_name##_MASK)))

/* get bitfield value from u32 u32Val */
#define AMD_GETBITS(u32Val, bitfield_stub_name)                         \
        ((u32Val & ((u32) bitfield_stub_name##_MASK))                   \
                >> ((u32) bitfield_stub_name##_OFS))

/* SET and GET bits in u32 values ------------------------------------------*/
#define AMD_BIT(bit_stub_name) (1 << bit_stub_name)
#define AMD_UNMASK_BIT(bit_stub_name) (~AMD_BIT(bit_stub_name))
#define AMD_CLEAR_BIT(bit_stub_name) (~AMD_BIT(bit_stub_name))

/* debug macros ------------------------------------------------------------*/

#define DBG(udc , args...)      dev_dbg(&(udc)->pdev->dev, args)

#ifdef UDC_VERBOSE
#define VDBG                    DBG
#else
#define VDBG(udc , args...)     do {} while (0)
#endif

#endif /* #ifdef AMD5536UDC_H */