Blackfin: BF537-stamp: cleanup spi flash driver

This punts the old spi flash driver for a new/generalized one until the
common one can be integrated.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

3 files changed, 3 insertions, 475 deletions

diff --git a/board/bf533-stamp/Makefile b/board/bf533-stamp/Makefile
index 02c941b5a5d..14bb7a24f6b 100644
--- a/board/bf533-stamp/Makefile
+++ b/board/bf533-stamp/Makefile
@@ -29,7 +29,7 @@ include $(TOPDIR)/config.mk
 
 LIB	= $(obj)lib$(BOARD).a
 
-COBJS	:= $(BOARD).o spi.o
+COBJS	:= $(BOARD).o spi_flash.o
 
 SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
 OBJS	:= $(addprefix $(obj),$(COBJS))
diff --git a/board/bf533-stamp/spi.c b/board/bf533-stamp/spi.c
deleted file mode 100644
index 15141cf7432..00000000000
--- a/board/bf533-stamp/spi.c
+++ /dev/null
@@ -1,474 +0,0 @@
-/****************************************************************************
- *  SPI flash driver for M25P64
- ****************************************************************************/
-#include <common.h>
-#include <linux/ctype.h>
-#include <asm/io.h>
-#include <asm/mach-common/bits/spi.h>
-
-#if defined(CONFIG_SPI)
-
- /*Application definitions */
-
-#define	NUM_SECTORS 	128	/* number of sectors */
-#define SECTOR_SIZE		0x10000
-#define NOP_NUM		1000
-
-#define COMMON_SPI_SETTINGS (SPE|MSTR|CPHA|CPOL)	/*Settings to the SPI_CTL */
-#define TIMOD01 (0x01)		/*stes the SPI to work with core instructions */
-
- /*Flash commands */
-#define SPI_WREN	(0x06)	/*Set Write Enable Latch */
-#define SPI_WRDI	(0x04)	/*Reset Write Enable Latch */
-#define SPI_RDSR	(0x05)	/*Read Status Register */
-#define SPI_WRSR	(0x01)	/*Write Status Register */
-#define SPI_READ	(0x03)	/*Read data from memory */
-#define SPI_PP  	(0x02)	/*Program Data into memory */
-#define SPI_SE  	(0xD8)	/*Erase one sector in memory */
-#define SPI_BE		(0xC7)	/*Erase all memory */
-#define WIP		(0x1)	/*Check the write in progress bit of the SPI status register */
-#define WEL		(0x2)	/*Check the write enable bit of the SPI status register */
-
-#define TIMEOUT 350000000
-
-typedef enum {
-	NO_ERR,
-	POLL_TIMEOUT,
-	INVALID_SECTOR,
-	INVALID_BLOCK,
-} ERROR_CODE;
-
-void spi_init_f(void);
-void spi_init_r(void);
-ssize_t spi_read(uchar *, int, uchar *, int);
-ssize_t spi_write(uchar *, int, uchar *, int);
-
-char ReadStatusRegister(void);
-void Wait_For_SPIF(void);
-void SetupSPI(const int spi_setting);
-void SPI_OFF(void);
-void SendSingleCommand(const int iCommand);
-
-ERROR_CODE GetSectorNumber(unsigned long ulOffset, int *pnSector);
-ERROR_CODE EraseBlock(int nBlock);
-ERROR_CODE ReadData(unsigned long ulStart, long lCount, int *pnData);
-ERROR_CODE WriteData(unsigned long ulStart, long lCount, int *pnData);
-ERROR_CODE Wait_For_Status(char Statusbit);
-ERROR_CODE Wait_For_WEL(void);
-
-/* -------------------
- * Variables
- * ------------------- */
-
-/* **************************************************************************
- *
- *  Function:    spi_init_f
- *
- *  Description: Init SPI-Controller (ROM part)
- *
- *  return:      ---
- *
- * *********************************************************************** */
-void spi_init_f(void)
-{
-}
-
-/* **************************************************************************
- *
- *  Function:    spi_init_r
- *
- *  Description: Init SPI-Controller (RAM part) -
- *		 The malloc engine is ready and we can move our buffers to
- *		 normal RAM
- *
- *  return:      ---
- *
- * *********************************************************************** */
-void spi_init_r(void)
-{
-	return;
-}
-
-/****************************************************************************
- *  Function:    spi_write
- **************************************************************************** */
-ssize_t spi_write(uchar * addr, int alen, uchar * buffer, int len)
-{
-	unsigned long offset;
-	int start_block, end_block;
-	int start_byte, end_byte;
-	ERROR_CODE result = NO_ERR;
-	uchar temp[SECTOR_SIZE];
-	int i, num;
-
-	offset = addr[0] << 16 | addr[1] << 8 | addr[2];
-	/* Get the start block number */
-	result = GetSectorNumber(offset, &start_block);
-	if (result == INVALID_SECTOR) {
-		printf("Invalid sector! ");
-		return 0;
-	}
-	/* Get the end block number */
-	result = GetSectorNumber(offset + len - 1, &end_block);
-	if (result == INVALID_SECTOR) {
-		printf("Invalid sector! ");
-		return 0;
-	}
-
-	for (num = start_block; num <= end_block; num++) {
-		ReadData(num * SECTOR_SIZE, SECTOR_SIZE, (int *)temp);
-		start_byte = num * SECTOR_SIZE;
-		end_byte = (num + 1) * SECTOR_SIZE - 1;
-		if (start_byte < offset)
-			start_byte = offset;
-		if (end_byte > (offset + len))
-			end_byte = (offset + len - 1);
-		for (i = start_byte; i <= end_byte; i++)
-			temp[i - num * SECTOR_SIZE] = buffer[i - offset];
-		EraseBlock(num);
-		result = WriteData(num * SECTOR_SIZE, SECTOR_SIZE, (int *)temp);
-		if (result != NO_ERR)
-			return 0;
-		printf(".");
-	}
-	return len;
-}
-
-/****************************************************************************
- *  Function:    spi_read
- **************************************************************************** */
-ssize_t spi_read(uchar * addr, int alen, uchar * buffer, int len)
-{
-	unsigned long offset;
-	offset = addr[0] << 16 | addr[1] << 8 | addr[2];
-	ReadData(offset, len, (int *)buffer);
-	return len;
-}
-
-void SendSingleCommand(const int iCommand)
-{
-	unsigned short dummy;
-
-	/*turns on the SPI in single write mode */
-	SetupSPI((COMMON_SPI_SETTINGS | TIMOD01));
-
-	/*sends the actual command to the SPI TX register */
-	*pSPI_TDBR = iCommand;
-	SSYNC();
-
-	/*The SPI status register will be polled to check the SPIF bit */
-	Wait_For_SPIF();
-
-	dummy = *pSPI_RDBR;
-
-	/*The SPI will be turned off */
-	SPI_OFF();
-
-}
-
-void SetupSPI(const int spi_setting)
-{
-
-	if (icache_status() || dcache_status())
-		udelay(CONFIG_CCLK_HZ / 50000000);
-	/*sets up the PF2 to be the slave select of the SPI */
-	*pSPI_FLG = 0xFB04;
-	*pSPI_BAUD = CONFIG_SPI_BAUD;
-	*pSPI_CTL = spi_setting;
-	SSYNC();
-}
-
-void SPI_OFF(void)
-{
-
-	*pSPI_CTL = 0x0400;	/* disable SPI */
-	*pSPI_FLG = 0;
-	*pSPI_BAUD = 0;
-	SSYNC();
-	udelay(CONFIG_CCLK_HZ / 50000000);
-
-}
-
-void Wait_For_SPIF(void)
-{
-	unsigned short dummyread;
-	while ((*pSPI_STAT & TXS)) ;
-	while (!(*pSPI_STAT & SPIF)) ;
-	while (!(*pSPI_STAT & RXS)) ;
-	dummyread = *pSPI_RDBR;	/* Read dummy to empty the receive register      */
-
-}
-
-ERROR_CODE Wait_For_WEL(void)
-{
-	int i;
-	char status_register = 0;
-	ERROR_CODE ErrorCode = NO_ERR;	/* tells us if there was an error erasing flash */
-
-	for (i = 0; i < TIMEOUT; i++) {
-		status_register = ReadStatusRegister();
-		if ((status_register & WEL)) {
-			ErrorCode = NO_ERR;	/* tells us if there was an error erasing flash */
-			break;
-		}
-		ErrorCode = POLL_TIMEOUT;	/* Time out error */
-	};
-
-	return ErrorCode;
-}
-
-ERROR_CODE Wait_For_Status(char Statusbit)
-{
-	int i;
-	char status_register = 0xFF;
-	ERROR_CODE ErrorCode = NO_ERR;	/* tells us if there was an error erasing flash */
-
-	for (i = 0; i < TIMEOUT; i++) {
-		status_register = ReadStatusRegister();
-		if (!(status_register & Statusbit)) {
-			ErrorCode = NO_ERR;	/* tells us if there was an error erasing flash */
-			break;
-		}
-		ErrorCode = POLL_TIMEOUT;	/* Time out error */
-	};
-
-	return ErrorCode;
-}
-
-char ReadStatusRegister(void)
-{
-	char status_register = 0;
-
-	SetupSPI((COMMON_SPI_SETTINGS | TIMOD01));	/* Turn on the SPI */
-
-	*pSPI_TDBR = SPI_RDSR;	/* send instruction to read status register */
-	SSYNC();
-	Wait_For_SPIF();	/*wait until the instruction has been sent */
-	*pSPI_TDBR = 0;		/*send dummy to receive the status register */
-	SSYNC();
-	Wait_For_SPIF();	/*wait until the data has been sent */
-	status_register = *pSPI_RDBR;	/*read the status register */
-
-	SPI_OFF();		/* Turn off the SPI */
-
-	return status_register;
-}
-
-ERROR_CODE GetSectorNumber(unsigned long ulOffset, int *pnSector)
-{
-	int nSector = 0;
-	ERROR_CODE ErrorCode = NO_ERR;
-
-	if (ulOffset > (NUM_SECTORS * 0x10000 - 1)) {
-		ErrorCode = INVALID_SECTOR;
-		return ErrorCode;
-	}
-
-	nSector = (int)ulOffset / 0x10000;
-	*pnSector = nSector;
-
-	/* ok */
-	return ErrorCode;
-}
-
-ERROR_CODE EraseBlock(int nBlock)
-{
-	unsigned long ulSectorOff = 0x0, ShiftValue;
-	ERROR_CODE ErrorCode = NO_ERR;
-
-	/* if the block is invalid just return */
-	if ((nBlock < 0) || (nBlock > NUM_SECTORS)) {
-		ErrorCode = INVALID_BLOCK;	/* tells us if there was an error erasing flash */
-		return ErrorCode;
-	}
-	/* figure out the offset of the block in flash */
-	if ((nBlock >= 0) && (nBlock < NUM_SECTORS)) {
-		ulSectorOff = (nBlock * SECTOR_SIZE);
-
-	} else {
-		ErrorCode = INVALID_BLOCK;	/* tells us if there was an error erasing flash */
-		return ErrorCode;
-	}
-
-	/* A write enable instruction must previously have been executed */
-	SendSingleCommand(SPI_WREN);
-
-	/*The status register will be polled to check the write enable latch "WREN" */
-	ErrorCode = Wait_For_WEL();
-
-	if (POLL_TIMEOUT == ErrorCode) {
-		printf("SPI Erase block error\n");
-		return ErrorCode;
-	} else
-		/*Turn on the SPI to send single commands */
-		SetupSPI((COMMON_SPI_SETTINGS | TIMOD01));
-
-	/* Send the erase block command to the flash followed by the 24 address  */
-	/* to point to the start of a sector. */
-	*pSPI_TDBR = SPI_SE;
-	SSYNC();
-	Wait_For_SPIF();
-	ShiftValue = (ulSectorOff >> 16);	/* Send the highest byte of the 24 bit address at first */
-	*pSPI_TDBR = ShiftValue;
-	SSYNC();
-	Wait_For_SPIF();	/* Wait until the instruction has been sent */
-	ShiftValue = (ulSectorOff >> 8);	/* Send the middle byte of the 24 bit address  at second */
-	*pSPI_TDBR = ShiftValue;
-	SSYNC();
-	Wait_For_SPIF();	/* Wait until the instruction has been sent */
-	*pSPI_TDBR = ulSectorOff;	/* Send the lowest byte of the 24 bit address finally */
-	SSYNC();
-	Wait_For_SPIF();	/* Wait until the instruction has been sent */
-
-	/*Turns off the SPI */
-	SPI_OFF();
-
-	/* Poll the status register to check the Write in Progress bit */
-	/* Sector erase takes time */
-	ErrorCode = Wait_For_Status(WIP);
-
-	/* block erase should be complete */
-	return ErrorCode;
-}
-
-/*****************************************************************************
-* ERROR_CODE ReadData()
-*
-* Read a value from flash for verify purpose
-*
-* Inputs:	unsigned long ulStart - holds the SPI start address
-*			int pnData - pointer to store value read from flash
-*			long lCount - number of elements to read
-***************************************************************************** */
-ERROR_CODE ReadData(unsigned long ulStart, long lCount, int *pnData)
-{
-	unsigned long ShiftValue;
-	char *cnData;
-	int i;
-
-	cnData = (char *)pnData;	/* Pointer cast to be able to increment byte wise */
-
-	/* Start SPI interface   */
-	SetupSPI((COMMON_SPI_SETTINGS | TIMOD01));
-
-	*pSPI_TDBR = SPI_READ;	/* Send the read command to SPI device */
-	SSYNC();
-	Wait_For_SPIF();	/* Wait until the instruction has been sent */
-	ShiftValue = (ulStart >> 16);	/* Send the highest byte of the 24 bit address at first */
-	*pSPI_TDBR = ShiftValue;	/* Send the byte to the SPI device */
-	SSYNC();
-	Wait_For_SPIF();	/* Wait until the instruction has been sent */
-	ShiftValue = (ulStart >> 8);	/* Send the middle byte of the 24 bit address  at second */
-	*pSPI_TDBR = ShiftValue;	/* Send the byte to the SPI device */
-	SSYNC();
-	Wait_For_SPIF();	/* Wait until the instruction has been sent */
-	*pSPI_TDBR = ulStart;	/* Send the lowest byte of the 24 bit address finally */
-	SSYNC();
-	Wait_For_SPIF();	/* Wait until the instruction has been sent */
-
-	/* After the SPI device address has been placed on the MOSI pin the data can be */
-	/* received on the MISO pin. */
-	for (i = 0; i < lCount; i++) {
-		*pSPI_TDBR = 0;	/*send dummy */
-		SSYNC();
-		while (!(*pSPI_STAT & RXS)) ;
-		*cnData++ = *pSPI_RDBR;	/*read  */
-
-		if ((i >= SECTOR_SIZE) && (i % SECTOR_SIZE == 0))
-			printf(".");
-	}
-
-	SPI_OFF();		/* Turn off the SPI */
-
-	return NO_ERR;
-}
-
-ERROR_CODE WriteFlash(unsigned long ulStartAddr, long lTransferCount,
-		      int *iDataSource, long *lWriteCount)
-{
-
-	unsigned long ulWAddr;
-	long lWTransferCount = 0;
-	int i;
-	char iData;
-	char *temp = (char *)iDataSource;
-	ERROR_CODE ErrorCode = NO_ERR;	/* tells us if there was an error erasing flash */
-
-	/* First, a Write Enable Command must be sent to the SPI. */
-	SendSingleCommand(SPI_WREN);
-
-	/* Second, the SPI Status Register will be tested whether the  */
-	/*         Write Enable Bit has been set.  */
-	ErrorCode = Wait_For_WEL();
-	if (POLL_TIMEOUT == ErrorCode) {
-		printf("SPI Write Time Out\n");
-		return ErrorCode;
-	} else
-		/* Third, the 24 bit address will be shifted out the SPI MOSI bytewise. */
-		SetupSPI((COMMON_SPI_SETTINGS | TIMOD01));	/* Turns the SPI on */
-	*pSPI_TDBR = SPI_PP;
-	SSYNC();
-	Wait_For_SPIF();	/*wait until the instruction has been sent */
-	ulWAddr = (ulStartAddr >> 16);
-	*pSPI_TDBR = ulWAddr;
-	SSYNC();
-	Wait_For_SPIF();	/*wait until the instruction has been sent */
-	ulWAddr = (ulStartAddr >> 8);
-	*pSPI_TDBR = ulWAddr;
-	SSYNC();
-	Wait_For_SPIF();	/*wait until the instruction has been sent */
-	ulWAddr = ulStartAddr;
-	*pSPI_TDBR = ulWAddr;
-	SSYNC();
-	Wait_For_SPIF();	/*wait until the instruction has been sent */
-	/* Fourth, maximum number of 256 bytes will be taken from the Buffer */
-	/* and sent to the SPI device. */
-	for (i = 0; (i < lTransferCount) && (i < 256); i++, lWTransferCount++) {
-		iData = *temp;
-		*pSPI_TDBR = iData;
-		SSYNC();
-		Wait_For_SPIF();	/*wait until the instruction has been sent */
-		temp++;
-	}
-
-	SPI_OFF();		/* Turns the SPI off */
-
-	/* Sixth, the SPI Write in Progress Bit must be toggled to ensure the  */
-	/* programming is done before start of next transfer. */
-	ErrorCode = Wait_For_Status(WIP);
-
-	if (POLL_TIMEOUT == ErrorCode) {
-		printf("SPI Program Time out!\n");
-		return ErrorCode;
-	} else
-
-		*lWriteCount = lWTransferCount;
-
-	return ErrorCode;
-}
-
-ERROR_CODE WriteData(unsigned long ulStart, long lCount, int *pnData)
-{
-
-	unsigned long ulWStart = ulStart;
-	long lWCount = lCount, lWriteCount;
-	long *pnWriteCount = &lWriteCount;
-
-	ERROR_CODE ErrorCode = NO_ERR;
-
-	while (lWCount != 0) {
-		ErrorCode = WriteFlash(ulWStart, lWCount, pnData, pnWriteCount);
-
-		/* After each function call of WriteFlash the counter must be adjusted */
-		lWCount -= *pnWriteCount;
-
-		/* Also, both address pointers must be recalculated. */
-		ulWStart += *pnWriteCount;
-		pnData += *pnWriteCount / 4;
-	}
-
-	/* return the appropriate error code */
-	return ErrorCode;
-}
-
-#endif				/* CONFIG_SPI */
diff --git a/board/bf533-stamp/spi_flash.c b/board/bf533-stamp/spi_flash.c
new file mode 100644
index 00000000000..8784741bb84
--- /dev/null
+++ b/board/bf533-stamp/spi_flash.c
@@ -0,0 +1,2 @@
+/* Share the spi flash code */
+#include "../bf537-stamp/spi_flash.c"