ColdFire: Add MCF547x_8x dma code and header files

Signed-off-by: TsiChungLiew <Tsi-Chung.Liew@freescale.com>
Signed-off by: John Rigby <jrigby@freescale.com>

1 files changed, 386 insertions, 0 deletions

diff --git a/include/MCD_dma.h b/include/MCD_dma.h
new file mode 100644
index 0000000000..2d6bc00723
--- /dev/null
+++ b/include/MCD_dma.h
@@ -0,0 +1,386 @@
+/*
+ * Copyright (C) 2004-2007 Freescale Semiconductor, Inc.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#ifndef _MCD_API_H
+#define _MCD_API_H
+
+/* Turn Execution Unit tasks ON (#define) or OFF (#undef) */
+#undef MCD_INCLUDE_EU
+
+/* Number of DMA channels */
+#define NCHANNELS	16
+
+/* Total number of variants */
+#ifdef MCD_INCLUDE_EU
+#define NUMOFVARIANTS	6
+#else
+#define NUMOFVARIANTS	4
+#endif
+
+/* Define sizes of the various tables */
+#define TASK_TABLE_SIZE		(NCHANNELS*32)
+#define VAR_TAB_SIZE		(128)
+#define CONTEXT_SAVE_SIZE	(128)
+#define FUNCDESC_TAB_SIZE	(256)
+
+#ifdef MCD_INCLUDE_EU
+#define FUNCDESC_TAB_NUM	16
+#else
+#define FUNCDESC_TAB_NUM	1
+#endif
+
+#ifndef DEFINESONLY
+
+/* Portability typedefs */
+#if 1
+#include "common.h"
+#else
+#ifndef s32
+typedef int s32;
+#endif
+#ifndef u32
+typedef unsigned int u32;
+#endif
+#ifndef s16
+typedef short s16;
+#endif
+#ifndef u16
+typedef unsigned short u16;
+#endif
+#ifndef s8
+typedef char s8;
+#endif
+#ifndef u8
+typedef unsigned char u8;
+#endif
+#endif
+
+/*
+ * These structures represent the internal registers of the
+ * multi-channel DMA
+ */
+struct dmaRegs_s {
+	u32 taskbar;		/* task table base address */
+	u32 currPtr;
+	u32 endPtr;
+	u32 varTablePtr;
+	u16 dma_rsvd0;
+	u16 ptdControl;		/* ptd control */
+	u32 intPending;		/* interrupt pending */
+	u32 intMask;		/* interrupt mask */
+	u16 taskControl[16];	/* task control */
+	u8 priority[32];	/* priority */
+	u32 initiatorMux;	/* initiator mux control */
+	u32 taskSize0;		/* task size control 0. */
+	u32 taskSize1;		/* task size control 1. */
+	u32 dma_rsvd1;		/* reserved */
+	u32 dma_rsvd2;		/* reserved */
+	u32 debugComp1;		/* debug comparator 1 */
+	u32 debugComp2;		/* debug comparator 2 */
+	u32 debugControl;	/* debug control */
+	u32 debugStatus;	/* debug status */
+	u32 ptdDebug;		/* priority task decode debug */
+	u32 dma_rsvd3[31];	/* reserved */
+};
+typedef volatile struct dmaRegs_s dmaRegs;
+
+#endif
+
+/* PTD contrl reg bits */
+#define PTD_CTL_TSK_PRI		0x8000
+#define PTD_CTL_COMM_PREFETCH	0x0001
+
+/* Task Control reg bits and field masks */
+#define TASK_CTL_EN		0x8000
+#define TASK_CTL_VALID		0x4000
+#define TASK_CTL_ALWAYS		0x2000
+#define TASK_CTL_INIT_MASK	0x1f00
+#define TASK_CTL_ASTRT		0x0080
+#define TASK_CTL_HIPRITSKEN	0x0040
+#define TASK_CTL_HLDINITNUM	0x0020
+#define TASK_CTL_ASTSKNUM_MASK	0x000f
+
+/* Priority reg bits and field masks */
+#define PRIORITY_HLD		0x80
+#define PRIORITY_PRI_MASK	0x07
+
+/* Debug Control reg bits and field masks */
+#define DBG_CTL_BLOCK_TASKS_MASK	0xffff0000
+#define DBG_CTL_AUTO_ARM		0x00008000
+#define DBG_CTL_BREAK			0x00004000
+#define DBG_CTL_COMP1_TYP_MASK		0x00003800
+#define DBG_CTL_COMP2_TYP_MASK		0x00000070
+#define DBG_CTL_EXT_BREAK		0x00000004
+#define DBG_CTL_INT_BREAK		0x00000002
+
+/*
+ * PTD Debug reg selector addresses
+ * This reg must be written with a value to show the contents of
+ * one of the desired internal register.
+ */
+#define PTD_DBG_REQ		0x00	/* shows the state of 31 initiators */
+#define PTD_DBG_TSK_VLD_INIT	0x01	/* shows which 16 tasks are valid and
+					   have initiators asserted */
+
+/* General return values */
+#define MCD_OK			0
+#define MCD_ERROR		-1
+#define MCD_TABLE_UNALIGNED	-2
+#define MCD_CHANNEL_INVALID	-3
+
+/* MCD_initDma input flags */
+#define MCD_RELOC_TASKS		0x00000001
+#define MCD_NO_RELOC_TASKS	0x00000000
+#define MCD_COMM_PREFETCH_EN	0x00000002	/* MCF547x/548x ONLY */
+
+/*
+ * MCD_dmaStatus Status Values for each channel:
+ * MCD_NO_DMA	- No DMA has been requested since reset
+ * MCD_IDLE	- DMA active, but the initiator is currently inactive
+ * MCD_RUNNING	- DMA active, and the initiator is currently active
+ * MCD_PAUSED	- DMA active but it is currently paused
+ * MCD_HALTED	- the most recent DMA has been killed with MCD_killTask()
+ * MCD_DONE	- the most recent DMA has completed
+ */
+#define MCD_NO_DMA		1
+#define MCD_IDLE		2
+#define MCD_RUNNING		3
+#define MCD_PAUSED		4
+#define MCD_HALTED		5
+#define MCD_DONE		6
+
+/* MCD_startDma parameter defines */
+
+/* Constants for the funcDesc parameter */
+/*
+ * MCD_NO_BYTE_SWAP	- to disable byte swapping
+ * MCD_BYTE_REVERSE	- to reverse the bytes of each u32 of the DMAed data
+ * MCD_U16_REVERSE	- to reverse the 16-bit halves of each 32-bit data
+ *			  value being DMAed
+ * MCD_U16_BYTE_REVERSE	- to reverse the byte halves of each 16-bit half of
+ *			  each 32-bit data value DMAed
+ * MCD_NO_BIT_REV	- do not reverse the bits of each byte DMAed
+ * MCD_BIT_REV		- reverse the bits of each byte DMAed
+ * MCD_CRC16		- to perform CRC-16 on DMAed data
+ * MCD_CRCCCITT		- to perform CRC-CCITT on DMAed data
+ * MCD_CRC32		- to perform CRC-32 on DMAed data
+ * MCD_CSUMINET		- to perform internet checksums on DMAed data
+ * MCD_NO_CSUM		- to perform no checksumming
+ */
+#define MCD_NO_BYTE_SWAP	0x00045670
+#define MCD_BYTE_REVERSE	0x00076540
+#define MCD_U16_REVERSE		0x00067450
+#define MCD_U16_BYTE_REVERSE	0x00054760
+#define MCD_NO_BIT_REV		0x00000000
+#define MCD_BIT_REV		0x00088880
+/* CRCing: */
+#define MCD_CRC16		0xc0100000
+#define MCD_CRCCCITT		0xc0200000
+#define MCD_CRC32		0xc0300000
+#define MCD_CSUMINET		0xc0400000
+#define MCD_NO_CSUM		0xa0000000
+
+#define MCD_FUNC_NOEU1		(MCD_NO_BYTE_SWAP | MCD_NO_BIT_REV | \
+				 MCD_NO_CSUM)
+#define MCD_FUNC_NOEU2		(MCD_NO_BYTE_SWAP | MCD_NO_CSUM)
+
+/* Constants for the flags parameter */
+#define MCD_TT_FLAGS_RL		0x00000001	/* Read line */
+#define MCD_TT_FLAGS_CW		0x00000002	/* Combine Writes */
+#define MCD_TT_FLAGS_SP		0x00000004	/* MCF547x/548x ONLY  */
+#define MCD_TT_FLAGS_MASK	0x000000ff
+#define MCD_TT_FLAGS_DEF	(MCD_TT_FLAGS_RL | MCD_TT_FLAGS_CW)
+
+#define MCD_SINGLE_DMA		0x00000100	/* Unchained DMA */
+#define MCD_CHAIN_DMA		/* TBD */
+#define MCD_EU_DMA		/* TBD */
+#define MCD_FECTX_DMA		0x00001000	/* FEC TX ring DMA */
+#define MCD_FECRX_DMA		0x00002000	/* FEC RX ring DMA */
+
+/* these flags are valid for MCD_startDma and the chained buffer descriptors */
+/*
+ * MCD_BUF_READY	- indicates that this buf is now under the DMA's ctrl
+ * MCD_WRAP		- to tell the FEC Dmas to wrap to the first BD
+ * MCD_INTERRUPT	- to generate an interrupt after completion of the DMA
+ * MCD_END_FRAME	- tell the DMA to end the frame when transferring
+ *			  last byte of data in buffer
+ * MCD_CRC_RESTART	- to empty out the accumulated checksum prior to
+ *			  performing the DMA
+ */
+#define MCD_BUF_READY		0x80000000
+#define MCD_WRAP		0x20000000
+#define MCD_INTERRUPT		0x10000000
+#define MCD_END_FRAME		0x08000000
+#define MCD_CRC_RESTART		0x40000000
+
+/* Defines for the FEC buffer descriptor control/status word*/
+#define MCD_FEC_BUF_READY	0x8000
+#define MCD_FEC_WRAP		0x2000
+#define MCD_FEC_INTERRUPT	0x1000
+#define MCD_FEC_END_FRAME	0x0800
+
+/* Defines for general intuitiveness */
+
+#define MCD_TRUE		1
+#define MCD_FALSE		0
+
+/* Three different cases for destination and source. */
+#define MINUS1			-1
+#define ZERO			0
+#define PLUS1			1
+
+#ifndef DEFINESONLY
+
+/* Task Table Entry struct*/
+typedef struct {
+	u32 TDTstart;		/* task descriptor table start */
+	u32 TDTend;		/* task descriptor table end */
+	u32 varTab;		/* variable table start */
+	u32 FDTandFlags;	/* function descriptor table start & flags */
+	volatile u32 descAddrAndStatus;
+	volatile u32 modifiedVarTab;
+	u32 contextSaveSpace;	/* context save space start */
+	u32 literalBases;
+} TaskTableEntry;
+
+/* Chained buffer descriptor:
+ * flags	- flags describing the DMA
+ * csumResult	- checksum performed since last checksum reset
+ * srcAddr	- the address to move data from
+ * destAddr	- the address to move data to
+ * lastDestAddr	- the last address written to
+ * dmaSize	- the no of bytes to xfer independent of the xfer sz
+ * next		- next buffer descriptor in chain
+ * info		- private info about this descriptor;  DMA does not affect it
+ */
+typedef volatile struct MCD_bufDesc_struct MCD_bufDesc;
+struct MCD_bufDesc_struct {
+	u32 flags;
+	u32 csumResult;
+	s8 *srcAddr;
+	s8 *destAddr;
+	s8 *lastDestAddr;
+	u32 dmaSize;
+	MCD_bufDesc *next;
+	u32 info;
+};
+
+/* Progress Query struct:
+ * lastSrcAddr	- the most-recent or last, post-increment source address
+ * lastDestAddr	- the most-recent or last, post-increment destination address
+ * dmaSize	- the amount of data transferred for the current buffer
+ * currBufDesc	- pointer to the current buffer descriptor being DMAed
+ */
+
+typedef volatile struct MCD_XferProg_struct {
+	s8 *lastSrcAddr;
+	s8 *lastDestAddr;
+	u32 dmaSize;
+	MCD_bufDesc *currBufDesc;
+} MCD_XferProg;
+
+/* FEC buffer descriptor */
+typedef volatile struct MCD_bufDescFec_struct {
+	u16 statCtrl;
+	u16 length;
+	u32 dataPointer;
+} MCD_bufDescFec;
+
+/*************************************************************************/
+/* API function Prototypes  - see MCD_dmaApi.c for further notes */
+
+/* MCD_startDma starts a particular kind of DMA:
+ * srcAddr	- the channel on which to run the DMA
+ * srcIncr	- the address to move data from, or buffer-descriptor address
+ * destAddr	- the amount to increment the source address per transfer
+ * destIncr	- the address to move data to
+ * dmaSize	- the amount to increment the destination address per transfer
+ * xferSize	- the number bytes in of each data movement (1, 2, or 4)
+ * initiator	- what device initiates the DMA
+ * priority	- priority of the DMA
+ * flags	- flags describing the DMA
+ * funcDesc	- description of byte swapping, bit swapping, and CRC actions
+ */
+int MCD_startDma(int channel, s8 * srcAddr, s16 srcIncr, s8 * destAddr,
+		 s16 destIncr, u32 dmaSize, u32 xferSize, u32 initiator,
+		 int priority, u32 flags, u32 funcDesc);
+
+/*
+ * MCD_initDma() initializes the DMA API by setting up a pointer to the DMA
+ * registers, relocating and creating the appropriate task structures, and
+ * setting up some global settings
+ */
+int MCD_initDma(dmaRegs * sDmaBarAddr, void *taskTableDest, u32 flags);
+
+/* MCD_dmaStatus() returns the status of the DMA on the requested channel. */
+int MCD_dmaStatus(int channel);
+
+/* MCD_XferProgrQuery() returns progress of DMA on requested channel */
+int MCD_XferProgrQuery(int channel, MCD_XferProg * progRep);
+
+/*
+ * MCD_killDma() halts the DMA on the requested channel, without any
+ * intention of resuming the DMA.
+ */
+int MCD_killDma(int channel);
+
+/*
+ * MCD_continDma() continues a DMA which as stopped due to encountering an
+ * unready buffer descriptor.
+ */
+int MCD_continDma(int channel);
+
+/*
+ * MCD_pauseDma() pauses the DMA on the given channel ( if any DMA is
+ * running on that channel).
+ */
+int MCD_pauseDma(int channel);
+
+/*
+ * MCD_resumeDma() resumes the DMA on a given channel (if any DMA is
+ * running on that channel).
+ */
+int MCD_resumeDma(int channel);
+
+/* MCD_csumQuery provides the checksum/CRC after performing a non-chained DMA */
+int MCD_csumQuery(int channel, u32 * csum);
+
+/*
+ * MCD_getCodeSize provides the packed size required by the microcoded task
+ * and structures.
+ */
+int MCD_getCodeSize(void);
+
+/*
+ * MCD_getVersion provides a pointer to a version string and returns a
+ * version number.
+ */
+int MCD_getVersion(char **longVersion);
+
+/* macro for setting a location in the variable table */
+#define MCD_SET_VAR(taskTab,idx,value) ((u32 *)(taskTab)->varTab)[idx] = value
+/* Note that MCD_SET_VAR() is invoked many times in firing up a DMA function,
+   so I'm avoiding surrounding it with "do {} while(0)" */
+
+#endif				/* DEFINESONLY */
+
+#endif				/* _MCD_API_H */