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/*
* Generic Broadcom Home Networking Division (HND) DMA engine definitions.
* This supports the following chips: BCM42xx, 44xx, 47xx .
*
* Copyright 2004, Broadcom Corporation
* All Rights Reserved.
*
* THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
* KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
* SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
* $Id$
*/
#ifndef _hnddma_h_
#define _hnddma_h_
/*
* Each DMA processor consists of a transmit channel and a receive channel.
*/
typedef volatile struct {
/* transmit channel */
uint32 xmtcontrol; /* enable, et al */
uint32 xmtaddr; /* descriptor ring base address (4K aligned) */
uint32 xmtptr; /* last descriptor posted to chip */
uint32 xmtstatus; /* current active descriptor, et al */
/* receive channel */
uint32 rcvcontrol; /* enable, et al */
uint32 rcvaddr; /* descriptor ring base address (4K aligned) */
uint32 rcvptr; /* last descriptor posted to chip */
uint32 rcvstatus; /* current active descriptor, et al */
} dmaregs_t;
typedef volatile struct {
/* diag access */
uint32 fifoaddr; /* diag address */
uint32 fifodatalow; /* low 32bits of data */
uint32 fifodatahigh; /* high 32bits of data */
uint32 pad; /* reserved */
} dmafifo_t;
/* transmit channel control */
#define XC_XE ((uint32)1 << 0) /* transmit enable */
#define XC_SE ((uint32)1 << 1) /* transmit suspend request */
#define XC_LE ((uint32)1 << 2) /* loopback enable */
#define XC_FL ((uint32)1 << 4) /* flush request */
/* transmit descriptor table pointer */
#define XP_LD_MASK 0xfff /* last valid descriptor */
/* transmit channel status */
#define XS_CD_MASK 0x0fff /* current descriptor pointer */
#define XS_XS_MASK 0xf000 /* transmit state */
#define XS_XS_SHIFT 12
#define XS_XS_DISABLED 0x0000 /* disabled */
#define XS_XS_ACTIVE 0x1000 /* active */
#define XS_XS_IDLE 0x2000 /* idle wait */
#define XS_XS_STOPPED 0x3000 /* stopped */
#define XS_XS_SUSP 0x4000 /* suspend pending */
#define XS_XE_MASK 0xf0000 /* transmit errors */
#define XS_XE_SHIFT 16
#define XS_XE_NOERR 0x00000 /* no error */
#define XS_XE_DPE 0x10000 /* descriptor protocol error */
#define XS_XE_DFU 0x20000 /* data fifo underrun */
#define XS_XE_BEBR 0x30000 /* bus error on buffer read */
#define XS_XE_BEDA 0x40000 /* bus error on descriptor access */
#define XS_AD_MASK 0xfff00000 /* active descriptor */
#define XS_AD_SHIFT 20
/* receive channel control */
#define RC_RE ((uint32)1 << 0) /* receive enable */
#define RC_RO_MASK 0xfe /* receive frame offset */
#define RC_RO_SHIFT 1
#define RC_FM ((uint32)1 << 8) /* direct fifo receive (pio) mode */
/* receive descriptor table pointer */
#define RP_LD_MASK 0xfff /* last valid descriptor */
/* receive channel status */
#define RS_CD_MASK 0x0fff /* current descriptor pointer */
#define RS_RS_MASK 0xf000 /* receive state */
#define RS_RS_SHIFT 12
#define RS_RS_DISABLED 0x0000 /* disabled */
#define RS_RS_ACTIVE 0x1000 /* active */
#define RS_RS_IDLE 0x2000 /* idle wait */
#define RS_RS_STOPPED 0x3000 /* reserved */
#define RS_RE_MASK 0xf0000 /* receive errors */
#define RS_RE_SHIFT 16
#define RS_RE_NOERR 0x00000 /* no error */
#define RS_RE_DPE 0x10000 /* descriptor protocol error */
#define RS_RE_DFO 0x20000 /* data fifo overflow */
#define RS_RE_BEBW 0x30000 /* bus error on buffer write */
#define RS_RE_BEDA 0x40000 /* bus error on descriptor access */
#define RS_AD_MASK 0xfff00000 /* active descriptor */
#define RS_AD_SHIFT 20
/* fifoaddr */
#define FA_OFF_MASK 0xffff /* offset */
#define FA_SEL_MASK 0xf0000 /* select */
#define FA_SEL_SHIFT 16
#define FA_SEL_XDD 0x00000 /* transmit dma data */
#define FA_SEL_XDP 0x10000 /* transmit dma pointers */
#define FA_SEL_RDD 0x40000 /* receive dma data */
#define FA_SEL_RDP 0x50000 /* receive dma pointers */
#define FA_SEL_XFD 0x80000 /* transmit fifo data */
#define FA_SEL_XFP 0x90000 /* transmit fifo pointers */
#define FA_SEL_RFD 0xc0000 /* receive fifo data */
#define FA_SEL_RFP 0xd0000 /* receive fifo pointers */
/*
* DMA Descriptor
* Descriptors are only read by the hardware, never written back.
*/
typedef volatile struct {
uint32 ctrl; /* misc control bits & bufcount */
uint32 addr; /* data buffer address */
} dmadd_t;
/*
* Each descriptor ring must be 4096byte aligned
* and fit within a single 4096byte page.
*/
#define DMAMAXRINGSZ 4096
#define DMARINGALIGN 4096
/* control flags */
#define CTRL_BC_MASK 0x1fff /* buffer byte count */
#define CTRL_EOT ((uint32)1 << 28) /* end of descriptor table */
#define CTRL_IOC ((uint32)1 << 29) /* interrupt on completion */
#define CTRL_EOF ((uint32)1 << 30) /* end of frame */
#define CTRL_SOF ((uint32)1 << 31) /* start of frame */
/* control flags in the range [27:20] are core-specific and not defined here */
#define CTRL_CORE_MASK 0x0ff00000
/* export structure */
typedef volatile struct {
/* rx error counters */
uint rxgiants; /* rx giant frames */
uint rxnobuf; /* rx out of dma descriptors */
/* tx error counters */
uint txnobuf; /* tx out of dma descriptors */
} hnddma_t;
#ifndef di_t
#define di_t void
#endif
/* externs */
extern void *dma_attach(void *drv, void *dev, char *name, dmaregs_t *dmaregs,
uint ntxd, uint nrxd, uint rxbufsize, uint nrxpost, uint rxoffset,
uint ddoffset, uint dataoffset, uint *msg_level);
extern void dma_detach(di_t *di);
extern void dma_txreset(di_t *di);
extern void dma_rxreset(di_t *di);
extern void dma_txinit(di_t *di);
extern bool dma_txenabled(di_t *di);
extern void dma_rxinit(di_t *di);
extern void dma_rxenable(di_t *di);
extern bool dma_rxenabled(di_t *di);
extern void dma_txsuspend(di_t *di);
extern void dma_txresume(di_t *di);
extern bool dma_txsuspended(di_t *di);
extern bool dma_txstopped(di_t *di);
extern bool dma_rxstopped(di_t *di);
extern int dma_txfast(di_t *di, void *p, uint32 coreflags);
extern int dma_tx(di_t *di, void *p, uint32 coreflags);
extern void dma_fifoloopbackenable(di_t *di);
extern void *dma_rx(di_t *di);
extern void dma_rxfill(di_t *di);
extern void dma_txreclaim(di_t *di, bool forceall);
extern void dma_rxreclaim(di_t *di);
extern char *dma_dump(di_t *di, char *buf);
extern char *dma_dumptx(di_t *di, char *buf);
extern char *dma_dumprx(di_t *di, char *buf);
extern uint dma_getvar(di_t *di, char *name);
extern void *dma_getnexttxp(di_t *di, bool forceall);
extern void *dma_peeknexttxp(di_t *di);
extern void *dma_getnextrxp(di_t *di, bool forceall);
extern void dma_txblock(di_t *di);
extern void dma_txunblock(di_t *di);
extern uint dma_txactive(di_t *di);
extern void dma_txrotate(di_t *di);
#endif /* _hnddma_h_ */
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