/****************************************************************************
* arch/arm/src/lpc43/lpc43_spifi.c
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <stdint.h>
#include <stdbool.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <assert.h>
#include <errno.h>
#include <debug.h>
#include <nuttx/kmalloc.h>
#include <nuttx/fs/ioctl.h>
#include <nuttx/mtd.h>
#include <arch/irq.h>
#include <arch/board/board.h>
#include "up_arch.h"
#include "chip.h"
#include "lpc43_cgu.h"
#include "lpc43_spifi.h"
#include "lpc43_pinconfig.h"
#ifdef CONFIG_LPC43_SPIFI
/****************************************************************************
* Pre-Processor Definitions
****************************************************************************/
/* SPIFI Configuration ******************************************************/
/* This logic supports some special options that can be used to create an
* mtd device on the SPIFI FLASH. NOTE: CONFIG_LPC43_SPIFI=y must also
* be defined to enable SPIFI setup support:
*
* CONFIG_SPIFI_RDONLY - Create a read only device on SPIFI.
* CONFIG_SPIFI_OFFSET - Offset the beginning of the block driver this many
* bytes into the device address space. This offset must be an exact
* multiple of the erase block size. Default 0.
* CONFIG_SPIFI_SECTOR512 - If defined, then the driver will report a more
* FAT friendly 512 byte sector size and will manage the read-modify-write
* operations on the larger erase block.
* CONFIG_SPIFI_READONLY - Define to support only read-only operations.
*/
/* This is where the LPC43xx address where random-access reads begin */
#define SPIFI_BASE \
(FAR uint8_t *)(LPC43_SPIFI_DATA_BASE + CONFIG_SPIFI_OFFSET)
/* Check if we are using a hard-coded block size */
#ifdef CONFIG_SPIFI_BLKSIZE
# if CONFIG_SPIFI_BLKSIZE < 512
# error "CONFIG_SPIFI_BLKSIZE is too small"
# elif CONFIG_SPIFI_BLKSIZE == 512
# define SPIFI_BLKSHIFT 9
# elif CONFIG_SPIFI_BLKSIZE == 1024
# define SPIFI_BLKSHIFT 10
# elif CONFIG_SPIFI_BLKSIZE == (2*1024)
# define SPIFI_BLKSHIFT 11
# elif CONFIG_SPIFI_BLKSIZE == (4*1024)
# define SPIFI_BLKSHIFT 12
# elif CONFIG_SPIFI_BLKSIZE == (8*1024)
# define SPIFI_BLKSHIFT 13
# elif CONFIG_SPIFI_BLKSIZE == (16*1024)
# define SPIFI_BLKSHIFT 14
# elif CONFIG_SPIFI_BLKSIZE == (32*1024)
# define SPIFI_BLKSHIFT 15
# elif CONFIG_SPIFI_BLKSIZE == (64*1024)
# define SPIFI_BLKSHIFT 16
# elif CONFIG_SPIFI_BLKSIZE == (128*1024)
# define SPIFI_BLKSHIFT 17
# elif CONFIG_SPIFI_BLKSIZE == (256*1024)
# define SPIFI_BLKSHIFT 18
# else
# error "Unsupported value of CONFIG_SPIFI_BLKSIZE"
# endif
# define SPIFI_BLKSIZE CONFIG_SPIFI_BLKSIZE
#else
# define SPIFI_BLKSIZE priv->blksize
# define SPIFI_BLKSHIFT priv->blkshift
#endif
/* Can use ROM driver or an external driver library */
#ifndef CONFIG_SPIFI_LIBRARY
# define SPIFI_INIT(priv, rom, cshigh, options, mhz) \
priv->spifi->spifi_init(rom, cshigh, options, mhz)
# define SPIFI_PROGRAM(priv, rom, src, operands) \
priv->spifi->spifi_program(rom, src, operands)
# define SPIFI_ERASE(priv, rom, operands) \
priv->spifi->spifi_erase(rom, operands)
#else
# define SPIFI_INIT(priv, rom, cshigh, options, mhz) \
spifi_init(rom, cshigh, options, mhz)
# define SPIFI_PROGRAM(priv, rom, src, operands) \
spifi_program(rom, src, operands)
# define SPIFI_ERASE(priv, rom, operands) \
spifi_erase(rom, operands)
#endif
/* 512 byte sector simulation */
#ifdef CONFIG_SPIFI_SECTOR512 /* Emulate a 512 byte sector */
# define SPIFI_512SHIFT 9 /* Sector size 1 << 9 = 512 bytes */
# define SPIFI_512SIZE 512 /* Sector size = 512 bytes */
#endif
#define SPIFI_ERASED_STATE 0xff /* State of FLASH when erased */
/* Cache flags */
#define SST25_CACHE_VALID (1 << 0) /* 1=Cache has valid data */
#define SST25_CACHE_DIRTY (1 << 1) /* 1=Cache is dirty */
#define SST25_CACHE_ERASED (1 << 2) /* 1=Backing FLASH is erased */
#define IS_VALID(p) ((((p)->flags) & SST25_CACHE_VALID) != 0)
#define IS_DIRTY(p) ((((p)->flags) & SST25_CACHE_DIRTY) != 0)
#define IS_ERASED(p) ((((p)->flags) & SST25_CACHE_DIRTY) != 0)
#define SET_VALID(p) do { (p)->flags |= SST25_CACHE_VALID; } while (0)
#define SET_DIRTY(p) do { (p)->flags |= SST25_CACHE_DIRTY; } while (0)
#define SET_ERASED(p) do { (p)->flags |= SST25_CACHE_DIRTY; } while (0)
#define CLR_VALID(p) do { (p)->flags &= ~SST25_CACHE_VALID; } while (0)
#define CLR_DIRTY(p) do { (p)->flags &= ~SST25_CACHE_DIRTY; } while (0)
#define CLR_ERASED(p) do { (p)->flags &= ~SST25_CACHE_DIRTY; } while (0)
/* Select the divider to use as SPIFI input based on definitions in the
* board.h header file.
*/
#if defined(BOARD_SPIFI_PLL1)
# define BASE_SPIFI_CLKSEL BASE_SPIFI_CLKSEL_PLL1
#elif defined(BOARD_SPIFI_DIVA)
# define LPC43_IDIV_CTRL LPC43_IDIVA_CTRL
# define IDIV_CTRL_PD IDIVA_CTRL_PD
# define IDIV_CTRL_IDIV_MASK IDIVA_CTRL_IDIV_MASK
# define IDIV_CTRL_IDIV IDIVA_CTRL_IDIV(BOARD_SPIFI_DIVIDER)
# define IDIV_CTRL_IDIV_MAX 4
# define IDIV_CTRL_CLKSEL_MASK IDIVA_CTRL_CLKSEL_MASK
# define IDIV_CTRL_CLKSEL_PLL1 (IDIVA_CLKSEL_PLL1 | IDIVA_CTRL_AUTOBLOCK)
# define BASE_SPIFI_CLKSEL BASE_SPIFI_CLKSEL_IDIVA
#elif defined(BOARD_SPIFI_DIVB)
# define LPC43_IDIV_CTRL LPC43_IDIVB_CTRL
# define IDIV_CTRL_PD IDIVBCD_CTRL_PD
# define IDIV_CTRL_IDIV_MASK IDIVBCD_CTRL_IDIV_MASK
# define IDIV_CTRL_IDIV IDIVBCD_CTRL_IDIV(BOARD_SPIFI_DIVIDER)
# define IDIV_CTRL_IDIV_MAX 16
# define IDIV_CTRL_CLKSEL_MASK IDIVBCD_CTRL_CLKSEL_MASK
# define IDIV_CTRL_CLKSEL_PLL1 (IDIVBCD_CLKSEL_PLL1 | IDIVBCD_CTRL_AUTOBLOCK)
# define BASE_SPIFI_CLKSEL BASE_SPIFI_CLKSEL_IDIVB
#elif defined(BOARD_SPIFI_DIVC)
# define LPC43_IDIV_CTRL LPC43_IDIVC_CTRL
# define IDIV_CTRL_PD IDIVBCD_CTRL_PD
# define IDIV_CTRL_IDIV_MASK IDIVBCD_CTRL_IDIV_MASK
# define IDIV_CTRL_IDIV IDIVBCD_CTRL_IDIV(BOARD_SPIFI_DIVIDER)
# define IDIV_CTRL_IDIV_MAX 16
# define IDIV_CTRL_CLKSEL_MASK IDIVBCD_CTRL_CLKSEL_MASK
# define IDIV_CTRL_CLKSEL_PLL1 (IDIVBCD_CLKSEL_PLL1 | IDIVBCD_CTRL_AUTOBLOCK)
# define BASE_SPIFI_CLKSEL BASE_SPIFI_CLKSEL_IDIVC
#elif defined(BOARD_SPIFI_DIVD)
# define LPC43_IDIV_CTRL LPC43_IDIVD_CTRL
# define IDIV_CTRL_PD IDIVBCD_CTRL_PD
# define IDIV_CTRL_IDIV_MASK IDIVBCD_CTRL_IDIV_MASK
# define IDIV_CTRL_IDIV IDIVBCD_CTRL_IDIV(BOARD_SPIFI_DIVIDER)
# define IDIV_CTRL_IDIV_MAX 16
# define IDIV_CTRL_CLKSEL_MASK IDIVBCD_CTRL_CLKSEL_MASK
# define IDIV_CTRL_CLKSEL_PLL1 (IDIVBCD_CLKSEL_PLL1 | IDIVBCD_CTRL_AUTOBLOCK)
# define BASE_SPIFI_CLKSEL BASE_SPIFI_CLKSEL_IDIVD
#elif defined(BOARD_SPIFI_DIVE)
# define LPC43_IDIV_CTRL LPC43_IDIVE_CTRL
# define IDIV_CTRL_PD IDIVE_CTRL_PD
# define IDIV_CTRL_IDIV_MASK IDIVE_CTRL_IDIV_MASK
# define IDIV_CTRL_IDIV IDIVE_CTRL_IDIV(BOARD_SPIFI_DIVIDER)
# define IDIV_CTRL_IDIV_MAX 256
# define IDIV_CTRL_CLKSEL_MASK IDIVE_CTRL_CLKSEL_MASK
# define IDIV_CTRL_CLKSEL_PLL1 (IDIVE_CLKSEL_PLL1 | IDIVE_CTRL_AUTOBLOCK)
# define BASE_SPIFI_CLKSEL BASE_SPIFI_CLKSEL_IDIVE
#endif
#if BOARD_SPIFI_DIVIDER < 1 || BOARD_SPIFI_DIVIDER > IDIV_CTRL_IDIV_MAX
# error "Invalid value for BOARD_SPIFI_DIVIDER"
#endif
/* SPIFI_CSHIGH should be one less than the minimum number of clock cycles
* with the CS pin high, that the SPIFI should maintain between commands.
* Compute this from the SPIFI clock period and the minimum high time of CS
* from the serial flash data sheet:
*
* csHigh = ceiling( min CS high / SPIFI clock period ) - 1
*
* where ceiling means round up to the next higher integer if the argument
* isn�t an integer.
*/
#define SPIFI_CSHIGH 9
/* The final parameter of the spifi_init() ROM driver call should be the
* serial clock rate divided by 1000000, rounded to an integer. The SPIFI
* supports transfer rates of up to SPIFI_CLK/2 bytes per second. The SPIF_CLK
* is the output of the LPC43_BASE_SPIFI_CLK configured above; The frequency should
* be given by BOARD_SPIFI_FREQUENCY as provided by the board.h header file.
*/
#define SCLK_MHZ (BOARD_SPIFI_FREQUENCY + (1000000 / 2)) / 1000000
/****************************************************************************
* Private Types
****************************************************************************/
/* This type represents the state of the MTD device. The struct mtd_dev_s must
* appear at the beginning of the definition so that you can freely cast between
* pointers to struct mtd_dev_s and struct lpc43_dev_s.
*/
struct lpc43_dev_s
{
struct mtd_dev_s mtd; /* MTD interface */
#ifndef CONFIG_SPIFI_LIBRARY
FAR struct spifi_driver_s *spifi; /* Pointer to ROM driver table */
#endif
FAR struct spifi_dev_s rom; /* Needed for communication with ROM driver */
struct spifi_operands_s operands; /* Needed for program and erase ROM calls */
uint16_t nblocks; /* Number of blocks of size blksize */
#ifndef CONFIG_SPIFI_BLKSIZE
uint8_t blkshift; /* Log2 of erase block size */
uint32_t blksize; /* Size of one erase block (up to 256K) */
#endif
#if defined(CONFIG_SPIFI_SECTOR512) && !defined(CONFIG_SPIFI_READONLY)
uint8_t flags; /* Buffered sector flags */
uint16_t blkno; /* Erase block number in the cache */
FAR uint8_t *cache; /* Allocated sector data */
#endif
};
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
/* Helpers */
static void lpc43_blockerase(FAR struct lpc43_dev_s *priv, off_t offset);
static inline int lpc43_chiperase(FAR struct lpc43_dev_s *priv);
static inline void lpc43_pageread(FAR struct lpc43_dev_s *priv,
FAR uint8_t *dest, FAR const uint8_t *src,
size_t nbytes);
#ifndef CONFIG_SPIFI_READONLY
static int lpc43_pagewrite(FAR struct lpc43_dev_s *priv, FAR uint8_t *dest,
FAR const uint8_t *src, size_t nbytes);
#ifdef CONFIG_SPIFI_SECTOR512
static void lpc43_cacheflush(struct lpc43_dev_s *priv);
static FAR uint8_t *lpc43_cacheread(struct lpc43_dev_s *priv, off_t sector);
static void lpc43_cacheerase(struct lpc43_dev_s *priv, off_t sector);
static void lpc43_cachewrite(FAR struct lpc43_dev_s *priv, FAR const uint8_t *buffer,
off_t sector, size_t nsectors);
#endif
#endif
/* MTD driver methods */
static int lpc43_erase(FAR struct mtd_dev_s *dev, off_t startblock, size_t nblocks);
static ssize_t lpc43_bread(FAR struct mtd_dev_s *dev, off_t startblock,
size_t nblocks, FAR uint8_t *buf);
static ssize_t lpc43_bwrite(FAR struct mtd_dev_s *dev, off_t startblock,
size_t nblocks, FAR const uint8_t *buf);
static ssize_t lpc43_read(FAR struct mtd_dev_s *dev, off_t offset, size_t nbytes,
FAR uint8_t *buffer);
static int lpc43_ioctl(FAR struct mtd_dev_s *dev, int cmd, unsigned long arg);
/* Initialization */
#ifndef BOARD_SPIFI_PLL1
static inline void lpc43_idiv_clkconfig(void);
#endif
static inline void lpc43_spifi_clkconfig(void);
static inline void lpc43_spifi_pinconfig(void);
static inline int lpc43_rominit(FAR struct lpc43_dev_s *priv);
/****************************************************************************
* Private Data
****************************************************************************/
/* Only a single SPIFI driver instance is supported */
static struct lpc43_dev_s g_spifi;
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: lpc43_blockerase
****************************************************************************/
static void lpc43_blockerase(struct lpc43_dev_s *priv, off_t sector)
{
int result;
/* Erase one block on the chip:
*
* dest - Specifies the first address to be programmed or erased, either in
* the SPIFI memory area or as a zero-based device address. It must
* be at an offset that is an exact multiple of the erase block size.
* length - The number of bytes to be programmed or erased
*/
priv->operands.dest = SPIFI_BASE + (sector << SPIFI_BLKSHIFT);
priv->operands.length = SPIFI_BLKSIZE;
result = SPIFI_ERASE(priv, &priv->rom, &priv->operands);
if (result != 0)
{
fdbg("ERROR: SPIFI_ERASE failed: %05x\n", result);
}
}
/****************************************************************************
* Name: lpc43_chiperase
****************************************************************************/
static inline int lpc43_chiperase(struct lpc43_dev_s *priv)
{
int result;
/* Erase the entire chip:
*
* dest - Specifies the first address to be programmed or erased, either in
* the SPIFI memory area or as a zero-based device address. It must
* be at an offset that is an exact multiple of the erase block size.
* length - The number of bytes to be programmed or erased
*/
priv->operands.dest = SPIFI_BASE;
priv->operands.length = SPIFI_BLKSIZE * priv->nblocks;
result = SPIFI_ERASE(priv, &priv->rom, &priv->operands);
if (result != 0)
{
fdbg("ERROR: SPIFI_ERASE failed: %05x\n", result);
return -EIO;
}
return OK;
}
/****************************************************************************
* Name: lpc43_pagewrite
****************************************************************************/
#ifndef CONFIG_SPIFI_READONLY
static int lpc43_pagewrite(FAR struct lpc43_dev_s *priv, FAR uint8_t *dest,
FAR const uint8_t *src, size_t nbytes)
{
int result;
/* Write FLASH pages:
*
* dest - Specifies the first address to be programmed or erased, either in
* the SPIFI memory area or as a zero-based device address. It must
* be at an offset that is an exact multiple of the erase block size.
* length - The number of bytes to be programmed or erased
*/
priv->operands.dest = dest;
priv->operands.length = nbytes;
result = SPIFI_PROGRAM(priv, &priv->rom, src, &priv->operands);
if (result != 0)
{
fdbg("ERROR: SPIFI_PROGRAM failed: %05x\n", result);
return -EIO;
}
return OK;
}
#endif
/****************************************************************************
* Name: lpc43_pageread
****************************************************************************/
static inline void lpc43_pageread(FAR struct lpc43_dev_s *priv,
FAR uint8_t *dest, FAR const uint8_t *src,
size_t nbytes)
{
memcpy(dest, src, nbytes);
}
/****************************************************************************
* Name: lpc43_cacheflush
****************************************************************************/
#if defined(CONFIG_SPIFI_SECTOR512) && !defined(CONFIG_SPIFI_READONLY)
static void lpc43_cacheflush(struct lpc43_dev_s *priv)
{
FAR uint8_t *dest;
int ret;
/* If the cached is dirty (meaning that it no longer matches the old FLASH contents)
* or was erased (with the cache containing the correct FLASH contents), then write
* the cached erase block to FLASH.
*/
if (IS_DIRTY(priv) || IS_ERASED(priv))
{
/* Get the SPIFI address corresponding to the cached erase block */
dest = SPIFI_BASE + (priv->blkno << SPIFI_BLKSHIFT);
/* Write entire erase block to FLASH */
ret = lpc43_pagewrite(priv, dest, priv->cache, SPIFI_BLKSIZE);
if (ret < 0)
{
fdbg("ERROR: lpc43_pagewrite failed: %d\n", ret);
}
/* The case is no long dirty and the FLASH is no longer erased */
CLR_DIRTY(priv);
CLR_ERASED(priv);
}
}
#endif
/****************************************************************************
* Name: lpc43_cacheread
****************************************************************************/
#if defined(CONFIG_SPIFI_SECTOR512) && !defined(CONFIG_SPIFI_READONLY)
static FAR uint8_t *lpc43_cacheread(struct lpc43_dev_s *priv, off_t sector)
{
FAR const uint8_t *src;
off_t blkno;
int index;
/* Convert from the 512 byte sector to the erase sector size of the device. For
* exmample, if the actual erase sector size if 4Kb (1 << 12), then we first
* shift to the right by 3 to get the sector number in 4096 increments.
*/
blkno = sector >> (SPIFI_BLKSHIFT - SPIFI_512SHIFT);
fvdbg("sector: %ld blkno: %d\n", sector, blkno);
/* Check if the requested erase block is already in the cache */
if (!IS_VALID(priv) || blkno != priv->blkno)
{
/* No.. Flush any dirty erase block currently in the cache */
lpc43_cacheflush(priv);
/* Read the erase block into the cache */
/* Get the SPIFI address corresponding to the cached erase block */
src = SPIFI_BASE + (priv->blkno << SPIFI_BLKSHIFT);
/* Write entire erase block to FLASH */
lpc43_pageread(priv, priv->cache, src, SPIFI_BLKSIZE);
/* Mark the sector as cached */
priv->blkno = blkno;
SET_VALID(priv); /* The data in the cache is valid */
CLR_DIRTY(priv); /* It should match the FLASH contents */
CLR_ERASED(priv); /* The underlying FLASH has not been erased */
}
/* Get the index to the 512 sector in the erase block that holds the argument */
index = sector & ((1 << (SPIFI_BLKSHIFT - SPIFI_512SHIFT)) - 1);
/* Return the address in the cache that holds this sector */
return &priv->cache[index << SPIFI_512SHIFT];
}
#endif
/****************************************************************************
* Name: lpc43_cacheerase
****************************************************************************/
#if defined(CONFIG_SPIFI_SECTOR512) && !defined(CONFIG_SPIFI_READONLY)
static void lpc43_cacheerase(struct lpc43_dev_s *priv, off_t sector)
{
FAR uint8_t *dest;
/* First, make sure that the erase block containing the 512 byte sector is in
* the cache.
*/
dest = lpc43_cacheread(priv, sector);
/* Erase the block containing this sector if it is not already erased.
* The erased indicated will be cleared when the data from the erase sector
* is read into the cache and set here when we erase the block.
*/
if (!IS_ERASED(priv))
{
off_t blkno = sector >> (SPIFI_BLKSHIFT - SPIFI_512SHIFT);
fvdbg("sector: %ld blkno: %d\n", sector, blkno);
lpc43_blockerase(priv, blkno);
SET_ERASED(priv);
}
/* Put the cached sector data into the erase state and mart the cache as dirty
* (but don't update the FLASH yet. The caller will do that at a more optimal
* time).
*/
memset(dest, SPIFI_ERASED_STATE, SPIFI_512SIZE);
SET_DIRTY(priv);
}
#endif
/****************************************************************************
* Name: lpc43_cachewrite
****************************************************************************/
#if defined(CONFIG_SPIFI_SECTOR512) && !defined(CONFIG_SPIFI_READONLY)
static void lpc43_cachewrite(FAR struct lpc43_dev_s *priv, FAR const uint8_t *buffer,
off_t sector, size_t nsectors)
{
FAR uint8_t *dest;
for (; nsectors > 0; nsectors--)
{
/* First, make sure that the erase block containing 512 byte sector is in
* memory.
*/
dest = lpc43_cacheread(priv, sector);
/* Erase the block containing this sector if it is not already erased.
* The erased indicated will be cleared when the data from the erase sector
* is read into the cache and set here when we erase the sector.
*/
if (!IS_ERASED(priv))
{
off_t blkno = sector >> (SPIFI_BLKSHIFT - SPIFI_512SHIFT);
fvdbg("sector: %ld blkno: %d\n", sector, blkno);
lpc43_blockerase(priv, blkno);
SET_ERASED(priv);
}
/* Copy the new sector data into cached erase block */
memcpy(dest, buffer, SPIFI_512SIZE);
SET_DIRTY(priv);
/* Set up for the next 512 byte sector */
buffer += SPIFI_512SIZE;
sector++;
}
/* Flush the last erase block left in the cache */
lpc43_cacheflush(priv);
}
#endif
/****************************************************************************
* Name: lpc43_erase
****************************************************************************/
static int lpc43_erase(FAR struct mtd_dev_s *dev, off_t startblock, size_t nblocks)
{
#ifdef CONFIG_SPIFI_READONLY
return -EACESS
#else
FAR struct lpc43_dev_s *priv = (FAR struct lpc43_dev_s *)dev;
size_t blocksleft = nblocks;
fvdbg("startblock: %08lx nblocks: %d\n", (long)startblock, (int)nblocks);
while (blocksleft-- > 0)
{
/* Erase each sector */
#ifdef CONFIG_SPIFI_SECTOR512
lpc43_cacheerase(priv, startblock);
#else
lpc43_blockerase(priv, startblock);
#endif
startblock++;
}
#ifdef CONFIG_SPIFI_SECTOR512
/* Flush the last erase block left in the cache */
lpc43_cacheflush(priv);
#endif
return (int)nblocks;
#endif
}
/****************************************************************************
* Name: lpc43_bread
****************************************************************************/
static ssize_t lpc43_bread(FAR struct mtd_dev_s *dev, off_t startblock, size_t nblocks,
FAR uint8_t *buffer)
{
#ifdef CONFIG_SPIFI_SECTOR512
ssize_t nbytes;
fvdbg("startblock: %08lx nblocks: %d\n", (long)startblock, (int)nblocks);
/* On this device, we can handle the block read just like the byte-oriented read */
nbytes = lpc43_read(dev, startblock << SPIFI_512SHIFT, nblocks << SPIFI_512SHIFT, buffer);
if (nbytes > 0)
{
return nbytes >> SPIFI_512SHIFT;
}
return (int)nbytes;
#else
FAR struct lpc43_dev_s *priv = (FAR struct lpc43_dev_s *)dev;
ssize_t nbytes;
fvdbg("startblock: %08lx nblocks: %d\n", (long)startblock, (int)nblocks);
/* On this device, we can handle the block read just like the byte-oriented read */
nbytes = lpc43_read(dev, startblock << SPIFI_BLKSHIFT,
nblocks << SPIFI_BLKSHIFT, buffer);
if (nbytes > 0)
{
return nbytes >> SPIFI_BLKSHIFT;
}
return (int)nbytes;
#endif
}
/****************************************************************************
* Name: lpc43_bwrite
****************************************************************************/
static ssize_t lpc43_bwrite(FAR struct mtd_dev_s *dev, off_t startblock, size_t nblocks,
FAR const uint8_t *buffer)
{
#if defined(CONFIG_SPIFI_READONLY)
return -EACCESS;
#elif defined(CONFIG_SPIFI_SECTOR512)
FAR struct lpc43_dev_s *priv = (FAR struct lpc43_dev_s *)dev;
fvdbg("startblock: %08lx nblocks: %d\n", (long)startblock, (int)nblocks);
lpc43_cachewrite(priv, buffer, startblock, nblocks);
return nblocks;
#else
FAR struct lpc43_dev_s *priv = (FAR struct lpc43_dev_s *)dev;
FAR uint8_t *dest;
fvdbg("startblock: %08lx nblocks: %d\n", (long)startblock, (int)nblocks);
/* Get the SPIFI address corresponding to the erase block */
dest = SPIFI_BASE + (startblock << SPIFI_BLKSHIFT);
/* Write all of the erase blocks to FLASH */
ret = lpc43_pagewrite(priv, dest, buffer, nblocks << SPIFI_512SHIFT);
if (ret < 0)
{
fdbg("ERROR: lpc43_pagewrite failed: %d\n", ret);
return ret;
}
return nblocks;
#endif
}
/****************************************************************************
* Name: lpc43_read
****************************************************************************/
static ssize_t lpc43_read(FAR struct mtd_dev_s *dev, off_t offset, size_t nbytes,
FAR uint8_t *buffer)
{
FAR struct lpc43_dev_s *priv = (FAR struct lpc43_dev_s *)dev;
FAR const uint8_t *src;
fvdbg("offset: %08lx nbytes: %d\n", (long)offset, (int)nbytes);
/* Get the SPIFI address corresponding sector */
src = SPIFI_BASE + offset;
/* Read FLASH contents into the user buffer */
lpc43_pageread(priv, buffer, src, nbytes);
fvdbg("return nbytes: %d\n", (int)nbytes);
return nbytes;
}
/****************************************************************************
* Name: lpc43_ioctl
****************************************************************************/
static int lpc43_ioctl(FAR struct mtd_dev_s *dev, int cmd, unsigned long arg)
{
FAR struct lpc43_dev_s *priv = (FAR struct lpc43_dev_s *)dev;
int ret = -EINVAL; /* Assume good command with bad parameters */
fvdbg("cmd: %d \n", cmd);
switch (cmd)
{
case MTDIOC_GEOMETRY:
{
FAR struct mtd_geometry_s *geo = (FAR struct mtd_geometry_s *)((uintptr_t)arg);
if (geo)
{
/* Populate the geometry structure with information need to know
* the capacity and how to access the device.
*
* NOTE: that the device is treated as though it where just an array
* of fixed size blocks. That is most likely not true, but the client
* will expect the device logic to do whatever is necessary to make it
* appear so.
*/
#ifdef CONFIG_SPIFI_SECTOR512
geo->blocksize = 512;
geo->erasesize = 512;
geo->neraseblocks = priv->nblocks << (SPIFI_BLKSHIFT - SPIFI_512SHIFT);
#else
geo->blocksize = SPIFI_BLKSIZE;
geo->erasesize = SPIFI_BLKSIZE;
geo->neraseblocks = priv->nblocks;
#endif
ret = OK;
fvdbg("blocksize: %d erasesize: %d neraseblocks: %d\n",
geo->blocksize, geo->erasesize, geo->neraseblocks);
}
}
break;
case MTDIOC_BULKERASE:
{
/* Erase the entire device */
ret = lpc43_chiperase(priv);
}
break;
case MTDIOC_XIPBASE:
default:
ret = -ENOTTY; /* Bad command */
break;
}
fvdbg("return %d\n", ret);
return ret;
}
/****************************************************************************
* Name: lpc43_idiv_clkconfig
*
* Description:
* Configure PLL1 as the input to the selected divider and enable the
* divider.
*
****************************************************************************/
#ifndef BOARD_SPIFI_PLL1
static inline void lpc43_idiv_clkconfig(void)
{
uint32_t regval;
/* Configure PLL1 as the input to the selected divider */
regval = getreg32(LPC43_IDIV_CTRL);
regval &= ~IDIV_CTRL_CLKSEL_MASK;
regval |= IDIV_CTRL_CLKSEL_PLL1;
putreg32(regval, LPC43_IDIV_CTRL);
/* Enable the divider (by making sure that the power down bit is clear) */
regval &= ~IDIV_CTRL_PD;
putreg32(regval, LPC43_IDIV_CTRL);
/* Set the divider value */
regval &= ~IDIVA_CTRL_IDIV_MASK;
regval |= IDIV_CTRL_IDIV;
putreg32(regval, LPC43_IDIV_CTRL);
}
#else
# define lpc43_idiv_clkconfig()
#endif
/****************************************************************************
* Name: lpc43_spifi_clkconfig
*
* Description:
* Configure the selected divider (or PLL1) as the input to the SPIFI
* and enable the SPIFI clock.
*
****************************************************************************/
static inline void lpc43_spifi_clkconfig(void)
{
uint32_t regval;
/* Configure the selected divider (or PLL1) as the input to the SPIFI */
regval = getreg32(LPC43_BASE_SPIFI_CLK);
regval &= ~BASE_SPIFI_CLK_CLKSEL_MASK;
regval |= BASE_SPIFI_CLKSEL;
putreg32(regval, LPC43_BASE_SPIFI_CLK);
/* Enable the SPIFI clocking (by making sure that the power down bit is
* clear)
*/
regval &= ~IDIVA_CTRL_PD;
putreg32(regval, LPC43_BASE_SPIFI_CLK);
}
/****************************************************************************
* Name: lpc43_spifi_pinconfig
*
* Description:
* Configure SPIFI pins
*
****************************************************************************/
static inline void lpc43_spifi_pinconfig(void)
{
/* Configure SPIFI pins */
lpc43_pin_config(PINCONF_SPIFI_CS); /* Input buffering not needed */
lpc43_pin_config(PINCONF_SPIFI_MISO); /* High drive for SCLK */
lpc43_pin_config(PINCONF_SPIFI_MOSI);
lpc43_pin_config(PINCONF_SPIFI_SCK);
lpc43_pin_config(PINCONF_SPIFI_SIO2);
lpc43_pin_config(PINCONF_SPIFI_SIO3);
}
/****************************************************************************
* Name: lpc43_rominit
*
* Description:
* Initialize the SPIFI ROM driver
*
****************************************************************************/
static inline int lpc43_rominit(FAR struct lpc43_dev_s *priv)
{
#ifndef CONFIG_SPIFI_BLKSIZE
FAR struct spfi_desc_s *desc;
uint16_t sectors;
uint8_t log2;
#endif
int32_t result;
/* Get the pointer to the SPIFI ROM driver table. */
#ifndef CONFIG_SPIFI_LIBRARY
priv->spifi = *((struct spifi_driver_s **)SPIFI_ROM_PTR);
#endif
/* The final parameter of the spifi_init() ROM driver call should be the
* serial clock rate divided by 1000000, rounded to an integer. The SPIFI
* supports transfer rates of up to SPIFI_CLK/2 bytes per second. The SPIF_CLK
* is the output of the LPC43_BASE_SPIFI_CLK configured above; The frequency should
* be given by BOARD_SPIFI_FREQUENCY as provided by the board.h header file.
*
* A return value of zero frp spifi_init() indicates success. Non-zero error
* codes include:
*
* 0x2000A No operative serial flash (JEDEC ID all zeroes or all ones)
* 0x20009 Unknown manufacturer code
* 0x20008 Unknown device type code
* 0x20007 Unknown device ID code
* 0x20006 Unknown extended device ID value (only for Spansion 25FL12x
* in the initial API)
* 0x20005 Device status error
* 0x20004 Operand error: S_MODE3+S_FULLCLK+S_RCVCLK in options
*/
result = SPIFI_INIT(priv, &priv->rom, SPIFI_CSHIGH,
S_RCVCLK | S_FULLCLK, SCLK_MHZ);
if (result != 0)
{
fdbg("ERROR: SPIFI_INIT failed: %05x\n", result);
/* Try again */
result = SPIFI_INIT(priv, &priv->rom, SPIFI_CSHIGH,
S_RCVCLK | S_FULLCLK, SCLK_MHZ);
if (result != 0)
{
fdbg("ERROR: SPIFI_INIT failed: %05x\n", result);
return -ENODEV;
}
}
fvdbg("SPFI:\n");
fvdbg(" base: %08x\n", priv->rom.base);
fvdbg(" regbase: %08x\n", priv->rom.regbase);
fvdbg(" devsize: %08x\n", priv->rom.devsize);
fvdbg(" memsize: %08x\n", priv->rom.memsize);
fvdbg(" mfger: %02x\n", priv->rom.mfger);
fvdbg(" devtype: %02x\n", priv->rom.devtype);
fvdbg(" devid: %02x\n", priv->rom.devid);
fvdbg(" busy: %02x\n", priv->rom.busy);
fvdbg(" stat: %04x\n", priv->rom.stat.h);
fvdbg(" setprot: %04x\n", priv->rom.setprot);
fvdbg(" writeprot: %04x\n", priv->rom.writeprot);
fvdbg(" memcmd: %08x\n", priv->rom.memcmd);
fvdbg(" progcmd: %08x\n", priv->rom.progcmd);
fvdbg(" sectors: %04x\n", priv->rom.sectors);
fvdbg(" protbytes: %04x\n", priv->rom.protbytes);
fvdbg(" opts: %08x\n", priv->rom.opts);
fvdbg(" errcheck: %08x\n", priv->rom.errcheck);
/* Get the largest erase block size */
#ifndef CONFIG_SPIFI_BLKSIZE
desc = priv->rom.protents;
sectors = priv->rom.sectors;
log2 = 0;
fvdbg("FLASH Geometry:\n");
while (sectors > 0)
{
fvdbg(" log2: %d rept: %d\n", desc->log2, desc->rept);
/* Check if this is the largest erase block size seen */
if (desc->log2 > log2)
{
log2 = desc->log2;
}
/* Decrement the count of sectors we have checked */
sectors -= desc->rept;
}
DEBUGASSERT(log2 > 0);
/* Save the digested FLASH geometry info */
priv->blkshift = log2;
priv->blksize = (1 << log2);
priv->nblocks = priv->rom.memsize / priv->blksize;
fvdbg("Driver FLASH Geometry:\n");
fvdbg(" blkshift: %d\n", priv->blkshift);
fvdbg(" blksize: %08x\n", priv->blksize);
fvdbg(" nblocks: %d\n", priv->nblocks);
#if CONFIG_SPIFI_SECTOR512
DEBUGASSERT(log2 > 9);
#endif
#else
/* Save the digested FLASH geometry info */
priv->nblocks = (priv->rom.memsize >> SPIFI_BLKSHIFT);
fvdbg("Driver FLASH Geometry:\n");
fvdbg(" blkshift: %d\n", SPIFI_BLKSHIFT);
fvdbg(" blksize: %08x\n", SPIFI_BLKSIZE);
fvdbg(" nblocks: %d\n", priv->nblocks);
#endif
return OK;
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: lpc43_spifi_initialize
*
* Description:
* Create an initialized MTD device instance for the SPIFI device. MTD
* devices are not registered in the file system, but are created as
* instances that can be bound to other functions (such as a block or
* character driver front end).
*
* SPIFI interface clocking is configured per settings in the board.h file.
*
* Input Parameters:
* None
*
* Returned value:
* One success, a reference to the initialized MTD device instance is
* returned; NULL is returned on any failure.
*
****************************************************************************/
FAR struct mtd_dev_s *lpc43_spifi_initialize(void)
{
/* At present, only a single instance of the SPIFI driver is supported */
FAR struct lpc43_dev_s *priv = &g_spifi;
irqstate_t flags;
int ret;
/* Initialize the SPIFI driver structure. Since the driver instance lies
* in .bss, it should have been already cleared to zero.
*/
priv->mtd.erase = lpc43_erase;
priv->mtd.bread = lpc43_bread;
priv->mtd.bwrite = lpc43_bwrite;
priv->mtd.read = lpc43_read;
priv->mtd.ioctl = lpc43_ioctl;
priv->operands.protect = -1; /* Save and restore protection */
priv->operands.options = S_CALLER_ERASE; /* This driver will do erasure */
/* Initialize the SPIFI. Interrupts must be disabled here because shared
* CGU registers will be modified.
*/
flags = irqsave();
/* The SPIFI will receive clocking from a divider per the settings
* provided in the board.h file. Configure PLL1 as the input clock
* for the selected divider
*/
lpc43_idiv_clkconfig();
/* Configure SPIFI to received clocking from the selected divider */
lpc43_spifi_clkconfig();
/* Configure SPIFI pins */
lpc43_spifi_pinconfig();
irqrestore(flags);
/* Initialize the SPIFI ROM driver */
ret = lpc43_rominit(priv);
if (ret != OK)
{
return NULL;
}
/* Check if we need to emulator a 512 byte sector */
#ifdef CONFIG_SPIFI_SECTOR512
/* Allocate a buffer for the erase block cache */
priv->cache = (FAR uint8_t *)kmalloc(SPIFI_BLKSIZE);
if (!priv->cache)
{
/* Allocation failed! Discard all of that work we just did and return NULL */
fdbg("ERROR: Allocation failed\n");
return NULL;
}
#endif
/* Return the implementation-specific state structure as the MTD device */
fvdbg("Return %p\n", priv);
return (FAR struct mtd_dev_s *)priv;
}
/****************************************************************************
* Name: pullMISO
*
* Description:
* hardware-control routine used by spifi_rom_api.c
*
* Input Parameters:
* high
*
* Returned value:
* None.
*
****************************************************************************/
#ifdef CONFIG_SPIFI_LIBRARY
void pullMISO(int high)
{
uint32_t pinconfig;
/* Control MISO pull-up/down state Assume pull down by clearing:
*
* EPD = Enable pull-down connect (bit
*/
pinconfig = PINCONF_SPIFI_MISO & ~(PINCONF_PULLUP | PINCONF_PULLDOWN);
switch (high)
{
case 0:
{
/* Pull down */
pinconfig |= PINCONF_PULLDOWN;
}
break;
case 1:
{
/* Pull up */
pinconfig |= PINCONF_PULLUP;
}
break;
default:
{
/* Neither */
}
break;
}
/* Reconfigure MISO */
lpc43_pin_config(pinconfig);
}
#endif
#endif /* CONFIG_LPC43_SPIFI */
