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/*
* Generic Broadcom Home Networking Division (HND) DMA engine HW interface
* This supports the following chips: BCM42xx, 44xx, 47xx .
*
* Copyright (C) 1999-2012, Broadcom Corporation
*
* Unless you and Broadcom execute a separate written software license
* agreement governing use of this software, this software is licensed to you
* under the terms of the GNU General Public License version 2 (the "GPL"),
* available at http://www.broadcom.com/licenses/GPLv2.php, with the
* following added to such license:
*
* As a special exception, the copyright holders of this software give you
* permission to link this software with independent modules, and to copy and
* distribute the resulting executable under terms of your choice, provided that
* you also meet, for each linked independent module, the terms and conditions of
* the license of that module. An independent module is a module which is not
* derived from this software. The special exception does not apply to any
* modifications of the software.
*
* Notwithstanding the above, under no circumstances may you combine this
* software in any way with any other Broadcom software provided under a license
* other than the GPL, without Broadcom's express prior written consent.
*
* $Id: sbhnddma.h 309193 2012-01-19 00:03:57Z $
*/
#ifndef _sbhnddma_h_
#define _sbhnddma_h_
/* DMA structure:
* support two DMA engines: 32 bits address or 64 bit addressing
* basic DMA register set is per channel(transmit or receive)
* a pair of channels is defined for convenience
*/
/* 32 bits addressing */
/* dma registers per channel(xmt or rcv) */
typedef volatile struct {
uint32 control; /* enable, et al */
uint32 addr; /* descriptor ring base address (4K aligned) */
uint32 ptr; /* last descriptor posted to chip */
uint32 status; /* current active descriptor, et al */
} dma32regs_t;
typedef volatile struct {
dma32regs_t xmt; /* dma tx channel */
dma32regs_t rcv; /* dma rx channel */
} dma32regp_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 */
} dma32diag_t;
/*
* 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 */
} dma32dd_t;
/*
* Each descriptor ring must be 4096byte aligned, and fit within a single 4096byte page.
*/
#define D32RINGALIGN_BITS 12
#define D32MAXRINGSZ (1 << D32RINGALIGN_BITS)
#define D32RINGALIGN (1 << D32RINGALIGN_BITS)
#define D32MAXDD (D32MAXRINGSZ / sizeof (dma32dd_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 */
#define XC_MR_MASK 0x000000C0 /* Multiple outstanding reads */
#define XC_MR_SHIFT 6
#define XC_PD ((uint32)1 << 11) /* parity check disable */
#define XC_AE ((uint32)3 << 16) /* address extension bits */
#define XC_AE_SHIFT 16
#define XC_BL_MASK 0x001C0000 /* BurstLen bits */
#define XC_BL_SHIFT 18
#define XC_PC_MASK 0x00E00000 /* Prefetch control */
#define XC_PC_SHIFT 21
#define XC_PT_MASK 0x03000000 /* Prefetch threshold */
#define XC_PT_SHIFT 24
/* Multiple outstanding reads */
#define DMA_MR_1 0
#define DMA_MR_2 1
/* 2, 3: reserved */
/* DMA Burst Length in bytes */
#define DMA_BL_16 0
#define DMA_BL_32 1
#define DMA_BL_64 2
#define DMA_BL_128 3
#define DMA_BL_256 4
#define DMA_BL_512 5
#define DMA_BL_1024 6
/* Prefetch control */
#define DMA_PC_0 0
#define DMA_PC_4 1
#define DMA_PC_8 2
#define DMA_PC_16 3
/* others: reserved */
/* Prefetch threshold */
#define DMA_PT_1 0
#define DMA_PT_2 1
#define DMA_PT_4 2
#define DMA_PT_8 3
/* 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 */
#define RC_SH ((uint32)1 << 9) /* separate rx header descriptor enable */
#define RC_OC ((uint32)1 << 10) /* overflow continue */
#define RC_PD ((uint32)1 << 11) /* parity check disable */
#define RC_AE ((uint32)3 << 16) /* address extension bits */
#define RC_AE_SHIFT 16
#define RC_BL_MASK 0x001C0000 /* BurstLen bits */
#define RC_BL_SHIFT 18
#define RC_PC_MASK 0x00E00000 /* Prefetch control */
#define RC_PC_SHIFT 21
#define RC_PT_MASK 0x03000000 /* Prefetch threshold */
#define RC_PT_SHIFT 24
/* 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 */
#define FA_SEL_RSD 0xe0000 /* receive frame status data */
#define FA_SEL_RSP 0xf0000 /* receive frame status pointers */
/* descriptor control flags */
#define CTRL_BC_MASK 0x00001fff /* buffer byte count, real data len must <= 4KB */
#define CTRL_AE ((uint32)3 << 16) /* address extension bits */
#define CTRL_AE_SHIFT 16
#define CTRL_PARITY ((uint32)3 << 18) /* parity bit */
#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
/* 64 bits addressing */
/* dma registers per channel(xmt or rcv) */
typedef volatile struct {
uint32 control; /* enable, et al */
uint32 ptr; /* last descriptor posted to chip */
uint32 addrlow; /* descriptor ring base address low 32-bits (8K aligned) */
uint32 addrhigh; /* descriptor ring base address bits 63:32 (8K aligned) */
uint32 status0; /* current descriptor, xmt state */
uint32 status1; /* active descriptor, xmt error */
} dma64regs_t;
typedef volatile struct {
dma64regs_t tx; /* dma64 tx channel */
dma64regs_t rx; /* dma64 rx channel */
} dma64regp_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 */
} dma64diag_t;
/*
* DMA Descriptor
* Descriptors are only read by the hardware, never written back.
*/
typedef volatile struct {
uint32 ctrl1; /* misc control bits */
uint32 ctrl2; /* buffer count and address extension */
uint32 addrlow; /* memory address of the date buffer, bits 31:0 */
uint32 addrhigh; /* memory address of the date buffer, bits 63:32 */
} dma64dd_t;
/*
* Each descriptor ring must be 8kB aligned, and fit within a contiguous 8kB physical addresss.
*/
#define D64RINGALIGN_BITS 13
#define D64MAXRINGSZ (1 << D64RINGALIGN_BITS)
#define D64RINGALIGN (1 << D64RINGALIGN_BITS)
#define D64MAXDD (D64MAXRINGSZ / sizeof (dma64dd_t))
/* transmit channel control */
#define D64_XC_XE 0x00000001 /* transmit enable */
#define D64_XC_SE 0x00000002 /* transmit suspend request */
#define D64_XC_LE 0x00000004 /* loopback enable */
#define D64_XC_FL 0x00000010 /* flush request */
#define D64_XC_MR_MASK 0x000000C0 /* Multiple outstanding reads */
#define D64_XC_MR_SHIFT 6
#define D64_XC_PD 0x00000800 /* parity check disable */
#define D64_XC_AE 0x00030000 /* address extension bits */
#define D64_XC_AE_SHIFT 16
#define D64_XC_BL_MASK 0x001C0000 /* BurstLen bits */
#define D64_XC_BL_SHIFT 18
#define D64_XC_PC_MASK 0x00E00000 /* Prefetch control */
#define D64_XC_PC_SHIFT 21
#define D64_XC_PT_MASK 0x03000000 /* Prefetch threshold */
#define D64_XC_PT_SHIFT 24
/* transmit descriptor table pointer */
#define D64_XP_LD_MASK 0x00001fff /* last valid descriptor */
/* transmit channel status */
#define D64_XS0_CD_MASK 0x00001fff /* current descriptor pointer */
#define D64_XS0_XS_MASK 0xf0000000 /* transmit state */
#define D64_XS0_XS_SHIFT 28
#define D64_XS0_XS_DISABLED 0x00000000 /* disabled */
#define D64_XS0_XS_ACTIVE 0x10000000 /* active */
#define D64_XS0_XS_IDLE 0x20000000 /* idle wait */
#define D64_XS0_XS_STOPPED 0x30000000 /* stopped */
#define D64_XS0_XS_SUSP 0x40000000 /* suspend pending */
#define D64_XS1_AD_MASK 0x00001fff /* active descriptor */
#define D64_XS1_XE_MASK 0xf0000000 /* transmit errors */
#define D64_XS1_XE_SHIFT 28
#define D64_XS1_XE_NOERR 0x00000000 /* no error */
#define D64_XS1_XE_DPE 0x10000000 /* descriptor protocol error */
#define D64_XS1_XE_DFU 0x20000000 /* data fifo underrun */
#define D64_XS1_XE_DTE 0x30000000 /* data transfer error */
#define D64_XS1_XE_DESRE 0x40000000 /* descriptor read error */
#define D64_XS1_XE_COREE 0x50000000 /* core error */
/* receive channel control */
#define D64_RC_RE 0x00000001 /* receive enable */
#define D64_RC_RO_MASK 0x000000fe /* receive frame offset */
#define D64_RC_RO_SHIFT 1
#define D64_RC_FM 0x00000100 /* direct fifo receive (pio) mode */
#define D64_RC_SH 0x00000200 /* separate rx header descriptor enable */
#define D64_RC_OC 0x00000400 /* overflow continue */
#define D64_RC_PD 0x00000800 /* parity check disable */
#define D64_RC_AE 0x00030000 /* address extension bits */
#define D64_RC_AE_SHIFT 16
#define D64_RC_BL_MASK 0x001C0000 /* BurstLen bits */
#define D64_RC_BL_SHIFT 18
#define D64_RC_PC_MASK 0x00E00000 /* Prefetch control */
#define D64_RC_PC_SHIFT 21
#define D64_RC_PT_MASK 0x03000000 /* Prefetch threshold */
#define D64_RC_PT_SHIFT 24
/* flags for dma controller */
#define DMA_CTRL_PEN (1 << 0) /* partity enable */
#define DMA_CTRL_ROC (1 << 1) /* rx overflow continue */
#define DMA_CTRL_RXMULTI (1 << 2) /* allow rx scatter to multiple descriptors */
#define DMA_CTRL_UNFRAMED (1 << 3) /* Unframed Rx/Tx data */
#define DMA_CTRL_USB_BOUNDRY4KB_WAR (1 << 4)
#define DMA_CTRL_DMA_AVOIDANCE_WAR (1 << 5) /* DMA avoidance WAR for 4331 */
/* receive descriptor table pointer */
#define D64_RP_LD_MASK 0x00001fff /* last valid descriptor */
/* receive channel status */
#define D64_RS0_CD_MASK 0x00001fff /* current descriptor pointer */
#define D64_RS0_RS_MASK 0xf0000000 /* receive state */
#define D64_RS0_RS_SHIFT 28
#define D64_RS0_RS_DISABLED 0x00000000 /* disabled */
#define D64_RS0_RS_ACTIVE 0x10000000 /* active */
#define D64_RS0_RS_IDLE 0x20000000 /* idle wait */
#define D64_RS0_RS_STOPPED 0x30000000 /* stopped */
#define D64_RS0_RS_SUSP 0x40000000 /* suspend pending */
#define D64_RS1_AD_MASK 0x0001ffff /* active descriptor */
#define D64_RS1_RE_MASK 0xf0000000 /* receive errors */
#define D64_RS1_RE_SHIFT 28
#define D64_RS1_RE_NOERR 0x00000000 /* no error */
#define D64_RS1_RE_DPO 0x10000000 /* descriptor protocol error */
#define D64_RS1_RE_DFU 0x20000000 /* data fifo overflow */
#define D64_RS1_RE_DTE 0x30000000 /* data transfer error */
#define D64_RS1_RE_DESRE 0x40000000 /* descriptor read error */
#define D64_RS1_RE_COREE 0x50000000 /* core error */
/* fifoaddr */
#define D64_FA_OFF_MASK 0xffff /* offset */
#define D64_FA_SEL_MASK 0xf0000 /* select */
#define D64_FA_SEL_SHIFT 16
#define D64_FA_SEL_XDD 0x00000 /* transmit dma data */
#define D64_FA_SEL_XDP 0x10000 /* transmit dma pointers */
#define D64_FA_SEL_RDD 0x40000 /* receive dma data */
#define D64_FA_SEL_RDP 0x50000 /* receive dma pointers */
#define D64_FA_SEL_XFD 0x80000 /* transmit fifo data */
#define D64_FA_SEL_XFP 0x90000 /* transmit fifo pointers */
#define D64_FA_SEL_RFD 0xc0000 /* receive fifo data */
#define D64_FA_SEL_RFP 0xd0000 /* receive fifo pointers */
#define D64_FA_SEL_RSD 0xe0000 /* receive frame status data */
#define D64_FA_SEL_RSP 0xf0000 /* receive frame status pointers */
/* descriptor control flags 1 */
#define D64_CTRL_COREFLAGS 0x0ff00000 /* core specific flags */
#define D64_CTRL1_EOT ((uint32)1 << 28) /* end of descriptor table */
#define D64_CTRL1_IOC ((uint32)1 << 29) /* interrupt on completion */
#define D64_CTRL1_EOF ((uint32)1 << 30) /* end of frame */
#define D64_CTRL1_SOF ((uint32)1 << 31) /* start of frame */
/* descriptor control flags 2 */
#define D64_CTRL2_BC_MASK 0x00007fff /* buffer byte count. real data len must <= 16KB */
#define D64_CTRL2_AE 0x00030000 /* address extension bits */
#define D64_CTRL2_AE_SHIFT 16
#define D64_CTRL2_PARITY 0x00040000 /* parity bit */
/* control flags in the range [27:20] are core-specific and not defined here */
#define D64_CTRL_CORE_MASK 0x0ff00000
#define D64_RX_FRM_STS_LEN 0x0000ffff /* frame length mask */
#define D64_RX_FRM_STS_OVFL 0x00800000 /* RxOverFlow */
#define D64_RX_FRM_STS_DSCRCNT 0x0f000000 /* no. of descriptors used - 1, d11corerev >= 22 */
#define D64_RX_FRM_STS_DATATYPE 0xf0000000 /* core-dependent data type */
/* receive frame status */
typedef volatile struct {
uint16 len;
uint16 flags;
} dma_rxh_t;
#endif /* _sbhnddma_h_ */
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