/*      $NetBSD: dbdma.h,v 1.6 2016/07/15 21:08:27 macallan Exp $       */

/*
* Copyright 1991-1998 by Open Software Foundation, Inc.
*              All Rights Reserved
*
* Permission to use, copy, modify, and distribute this software and
* its documentation for any purpose and without fee is hereby granted,
* provided that the above copyright notice appears in all copies and
* that both the copyright notice and this permission notice appear in
* supporting documentation.
*
* OSF DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE.
*
* IN NO EVENT SHALL OSF BE LIABLE FOR ANY SPECIAL, INDIRECT, OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
* LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT,
* NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
*/

#ifndef _POWERMAC_DBDMA_H_
#define _POWERMAC_DBDMA_H_

#define DBDMA_CMD_OUT_MORE      0
#define DBDMA_CMD_OUT_LAST      1
#define DBDMA_CMD_IN_MORE       2
#define DBDMA_CMD_IN_LAST       3
#define DBDMA_CMD_STORE_QUAD    4
#define DBDMA_CMD_LOAD_QUAD     5
#define DBDMA_CMD_NOP           6
#define DBDMA_CMD_STOP          7

/* Keys */

#define DBDMA_KEY_STREAM0       0
#define DBDMA_KEY_STREAM1       1
#define DBDMA_KEY_STREAM2       2
#define DBDMA_KEY_STREAM3       3

/* value 4 is reserved */
#define DBDMA_KEY_REGS          5
#define DBDMA_KEY_SYSTEM        6
#define DBDMA_KEY_DEVICE        7

#define DBDMA_INT_NEVER         0
#define DBDMA_INT_IF_TRUE       1
#define DBDMA_INT_IF_FALSE      2
#define DBDMA_INT_ALWAYS        3

#define DBDMA_BRANCH_NEVER      0
#define DBDMA_BRANCH_IF_TRUE    1
#define DBDMA_BRANCH_IF_FALSE   2
#define DBDMA_BRANCH_ALWAYS     3

#define DBDMA_WAIT_NEVER        0
#define DBDMA_WAIT_IF_TRUE      1
#define DBDMA_WAIT_IF_FALSE     2
#define DBDMA_WAIT_ALWAYS       3


/* Channels */

#define DBDMA_SCSI0             0x0
#define DBDMA_CURIO_SCSI        DBDMA_SCSI0
#define DBDMA_FLOPPY            0x1
#define DBDMA_ETHERNET_TX       0x2
#define DBDMA_ETHERNET_RV       0x3
#define DBDMA_SCC_XMIT_A        0x4
#define DBDMA_SCC_RECV_A        0x5
#define DBDMA_SCC_XMIT_B        0x6
#define DBDMA_SCC_RECV_B        0x7
#define DBDMA_AUDIO_OUT         0x8
#define DBDMA_AUDIO_IN          0x9
#define DBDMA_SCSI1             0xA

/* Control register values (in little endian) */

#define DBDMA_STATUS_MASK       0x000000ff      /* Status Mask */
#define DBDMA_CNTRL_BRANCH      0x00000100
                               /* 0x200 reserved */
#define DBDMA_CNTRL_ACTIVE      0x00000400
#define DBDMA_CNTRL_DEAD        0x00000800
#define DBDMA_CNTRL_WAKE        0x00001000
#define DBDMA_CNTRL_FLUSH       0x00002000
#define DBDMA_CNTRL_PAUSE       0x00004000
#define DBDMA_CNTRL_RUN         0x00008000

#define DBDMA_SET_CNTRL(x)      ( ((x) | (x) << 16) )
#define DBDMA_CLEAR_CNTRL(x)    ( (x) << 16)


#define DBDMA_REGMAP(channel) \
               (dbdma_regmap_t *)((v_u_char *) POWERMAC_IO(PCI_DMA_BASE_PHYS) \
                               + (channel << 8))

/* This struct is layout in little endian format */

struct dbdma_command {
       uint16_t        d_count;
       uint16_t        d_command;
       uint32_t        d_address;
       uint32_t        d_cmddep;
       uint16_t        d_resid;
       uint16_t        d_status;
};

typedef struct dbdma_command dbdma_command_t;

#define DBDMA_BUILD_CMD(d, cmd, key, interrupt, wait, branch) {         \
               out16rb(&(d)->d_command,                                \
                               ((cmd) << 12) | ((key) << 8) |          \
                               ((interrupt) << 4) |                    \
                               ((branch) << 2) | (wait));              \
       }

#define DBDMA_BUILD(d, cmd, key, count, address, interrupt, wait, branch) { \
               out16rb(&(d)->d_count, count);                  \
               out32rb(&(d)->d_address, address);                      \
               (d)->d_resid = 0;                                       \
               (d)->d_status = 0;                                      \
               (d)->d_cmddep = 0;                                      \
               out16rb(&(d)->d_command,                                \
                               ((cmd) << 12) | ((key) << 8) |          \
                               ((interrupt) << 4) |                    \
                               ((branch) << 2) | (wait));              \
       }

#define DBDMA_LD4_ENDIAN(a)     in32rb(a)
#define DBDMA_ST4_ENDIAN(a, x)  out32rb(a, x)

/*
* DBDMA Channel layout
*
* NOTE - This structure is in little-endian format.
*/

struct dbdma_regmap {
       uint32_t        d_control;      /* Control Register */
       uint32_t        d_status;       /* DBDMA Status Register */
       uint32_t        d_cmdptrhi;     /* MSB of command pointer (not used yet) */
       uint32_t        d_cmdptrlo;     /* LSB of command pointer */
       uint32_t        d_intselect;    /* Interrupt Select */
       uint32_t        d_branch;       /* Branch selection */
       uint32_t        d_wait;         /* Wait selection */
       uint32_t        d_transmode;    /* Transfer modes */
       uint32_t        d_dataptrhi;    /* MSB of Data Pointer */
       uint32_t        d_dataptrlo;    /* LSB of Data Pointer */
       uint32_t        d_reserved;     /* Reserved for the moment */
       uint32_t        d_branchptrhi;  /* MSB of Branch Pointer */
       uint32_t        d_branchptrlo;  /* LSB of Branch Pointer */
       /* The remaining fields are undefinied and unimplemented */
};

typedef volatile struct dbdma_regmap dbdma_regmap_t;

/* DBDMA routines */

void    dbdma_start(dbdma_regmap_t *channel, dbdma_command_t *commands);
void    dbdma_stop(dbdma_regmap_t *channel);
void    dbdma_flush(dbdma_regmap_t *channel);
void    dbdma_reset(dbdma_regmap_t *channel);
void    dbdma_continue(dbdma_regmap_t *channel);
void    dbdma_pause(dbdma_regmap_t *channel);

dbdma_command_t *dbdma_alloc(int, void **);     /* Allocate command structures */
void    dbdma_free(void *, int);

#endif /* !defined(_POWERMAC_DBDMA_H_) */

You are viewing proxied material from ftp.icm.edu.pl. The copyright of proxied material belongs to its original authors. Any comments or complaints in relation to proxied material should be directed to the original authors of the content concerned. Please see the disclaimer for more details.