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nuttx/drivers/mtd/gd5f.c

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/************************************************************************************
* drivers/mtd/gd5f.c
* Driver for GigaDevice SPI nand flash.
*
* Copyright (C) 2019 FishSemi Inc. All rights reserved.
* Author: zhuyanlin <zhuyanlin@fishsemi.com>
*
* 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 <errno.h>
#include <debug.h>
#include <nuttx/kmalloc.h>
#include <nuttx/fs/ioctl.h>
#include <nuttx/spi/spi.h>
#include <nuttx/mtd/mtd.h>
/************************************************************************************
* Pre-processor Definitions
************************************************************************************/
/* Configuration ********************************************************************/
#ifndef CONFIG_GD5F_SPIMODE
# define CONFIG_GD5F_SPIMODE SPIDEV_MODE0
#endif
#ifndef CONFIG_GD5F_SPIFREQUENCY
# define CONFIG_GD5F_SPIFREQUENCY 20000000
#endif
/* GD5F Instructions ****************************************************************/
/* Command Value Description Addr Data */
/* Dummy */
#define GD5F_GET_FEATURE 0x0f /* Get features 1 0 1 */
#define GD5F_SET_FEATURE 0x1f /* Set features 1 0 1 */
#define GD5F_PAGE_READ 0x13 /* Array read 3 0 0 */
#define GD5F_READ_FROM_CACHE 0x03 /* Output cache data
* on SO 2 1 1-2112 */
#define GD5F_READ_ID 0x9f /* Read device ID 0 1 2 */
#define GD5F_ECC_STATUS_READ 0x7c /* Internal ECC status
* output 0 1 1 */
#define GD5F_BLOCK_ERASE 0xd8 /* Block erase 3 0 0 */
#define GD5F_PROGRAM_EXECUTE 0x10 /* Enter block/page
* address, execute 3 0 0 */
#define GD5F_PROGRAM_LOAD 0x02 /* Load program data with
* cache reset first 2 0 1-2112 */
#define GD5F_PROGRAM_LOAD_RANDOM 0x84 /* Load program data
* without cache reset 2 0 1-2112 */
#define GD5F_WRITE_ENABLE 0x06 /* 0 0 0 */
#define GD5F_WRITE_DISABLE 0x04 /* 0 0 0 */
#define GD5F_RESET 0xff /* Reset the device 0 0 0 */
#define GD5F_DUMMY 0x00 /* No Operation 0 0 0 */
/* Feature register *****************************************************************/
/* JEDEC Read ID register values */
#define GD5F_MANUFACTURER 0xc8
#define GD5F_GD5F_CAPACITY_MASK 0x0f
#define GD5F_CAPACITY_1GBIT 0x01 /* 1 Gb */
#define GD5F_CAPACITY_2GBIT 0x02 /* 2 Gb */
#define GD5F_CAPACITY_4GBIT 0x04 /* 4 Gb */
#define GD5F_NSECTORS_1GBIT 1024 /* 1024x131072 = 1Gbit memory capacity */
#define GD5F_NSECTORS_2GBIT 2048 /* 2048x131072 = 2Gbit memory capacity */
#define GD5F_NSECTORS_4GBIT 4096 /* 4096x131072 = 4Gbit memory capacity */
#define GD5F_SECTOR_SHIFT 17 /* 131072 byte */
#define GD5F_PAGE_SHIFT 11 /* 2048 */
/* Register address */
#define GD5F_SECURE_OTP 0xb0
#define GD5F_STATUS 0xc0
#define GD5F_BLOCK_PROTECTION 0xa0
/* Bit definitions */
/* Secure OTP (On-Time-Programmable) register */
#define GD5F_SOTP_QE (1 << 0) /* Bit 0: Quad Enable */
#define GD5F_SOTP_ECC (1 << 4) /* Bit 4: ECC enabled */
#define GD5F_SOTP_SOTP_EN (1 << 6) /* Bit 6: Secure OTP Enable */
#define GD5F_SOTP_SOTP_PROT (1 << 7) /* Bit 7: Secure OTP Protect */
/* Status register */
#define GD5F_SR_OIP (1 << 0) /* Bit 0: Operation in progress */
#define GD5F_SR_WEL (1 << 1) /* Bit 1: Write enable latch */
#define GD5F_SR_E_FAIL (1 << 2) /* Bit 2: Erase fail */
#define GD5F_SR_P_FAIL (1 << 3) /* Bit 3: Program Fail */
#define GD5F_SR_ECC_S0 (1 << 4) /* Bit 4-5: ECC Status */
#define GD5F_SR_ECC_S1 (1 << 5)
/* Block Protection register */
#define GD5F_BP_SP (1 << 0) /* Bit 0: Solid-protection (1Gb only) */
#define GD5F_BP_COMPL (1 << 1) /* Bit 1: Complementary (1Gb only) */
#define GD5F_BP_INV (1 << 2) /* Bit 2: Invert (1Gb only) */
#define GD5F_BP_BP0 (1 << 3) /* Bit 3: Block Protection 0 */
#define GD5F_BP_BP1 (1 << 4) /* Bit 4: Block Protection 1 */
#define GD5F_BP_BP2 (1 << 5) /* Bit 5: Block Protection 2 */
#define GD5F_BP_BPRWD (1 << 7) /* Bit 7: Block Protection Register
* Write Disable */
/* ECC Status register */
#define GD5F_FEATURE_ECC_MASK (0x03 << 4)
#define GD5F_FEATURE_ECC_ERROR (0x02 << 4)
#define GD5F_FEATURE_ECC_OFFSET 4
#define GD5F_ECC_STATUS_MASK 0x0f
/************************************************************************************
* 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 gd5f_dev_s.
*/
struct gd5f_dev_s
{
struct mtd_dev_s mtd; /* MTD interface */
FAR struct spi_dev_s *dev; /* Saved SPI interface instance */
uint8_t sectorshift; /* 17 */
uint16_t nsectors; /* 1024 or 2048 */
uint8_t pageshift; /* 11 */
uint8_t eccstatus; /* Internal ECC status */
uint32_t spi_devid; /* Chip select inputs */
};
/************************************************************************************
* Private Function Prototypes
************************************************************************************/
/* Helpers */
static inline void gd5f_lock(FAR struct spi_dev_s *dev);
static inline void gd5f_unlock(FAR struct spi_dev_s *dev);
static int gd5f_readid(FAR struct gd5f_dev_s *priv);
static bool gd5f_waitstatus(FAR struct gd5f_dev_s *priv, uint8_t mask,
bool successif);
static inline void gd5f_writeenable(FAR struct gd5f_dev_s *priv);
static inline void gd5f_writedisable(FAR struct gd5f_dev_s *priv);
static bool gd5f_sectorerase(FAR struct gd5f_dev_s *priv, off_t startsector);
static void gd5f_readbuffer(FAR struct gd5f_dev_s *priv, uint32_t address,
uint8_t *buffer, size_t length);
static bool gd5f_read_page(FAR struct gd5f_dev_s *priv, uint32_t position);
static void gd5f_write_to_cache(FAR struct gd5f_dev_s *priv, uint32_t address,
const uint8_t *buffer, size_t length);
static bool gd5f_execute_write(FAR struct gd5f_dev_s *priv, uint32_t position);
static inline void gd5f_eccstatusread(FAR struct gd5f_dev_s *priv);
static inline void gd5f_enable_ecc(FAR struct gd5f_dev_s *priv);
static inline void gd5f_unlockblocks(FAR struct gd5f_dev_s *priv);
/* MTD driver methods */
static ssize_t gd5f_bread(FAR struct mtd_dev_s *dev, off_t startblock,
size_t nblocks, FAR uint8_t *buffer);
static ssize_t gd5f_read(FAR struct mtd_dev_s *dev, off_t offset, size_t nbytes,
FAR uint8_t *buffer);
static ssize_t gd5f_bwrite(FAR struct mtd_dev_s *dev, off_t startblock,
size_t nblocks, FAR const uint8_t *buffer);
static ssize_t gd5f_write(FAR struct mtd_dev_s *dev, off_t offset, size_t nbytes,
FAR const uint8_t *buffer);
static int gd5f_ioctl(FAR struct mtd_dev_s *dev, int cmd, unsigned long arg);
static int gd5f_erase(FAR struct mtd_dev_s *dev, off_t startblock, size_t nblocks);
/************************************************************************************
* Private Functions
************************************************************************************/
/************************************************************************************
* Name: gd5f_lock
************************************************************************************/
static inline void gd5f_lock(FAR struct spi_dev_s *dev)
{
(void)SPI_LOCK(dev, true);
SPI_SETMODE(dev, CONFIG_GD5F_SPIMODE);
SPI_SETBITS(dev, 8);
(void)SPI_HWFEATURES(dev, 0);
(void)SPI_SETFREQUENCY(dev, CONFIG_GD5F_SPIFREQUENCY);
}
/************************************************************************************
* Name: gd5f_unlock
************************************************************************************/
static inline void gd5f_unlock(FAR struct spi_dev_s *dev)
{
(void)SPI_LOCK(dev, false);
}
/************************************************************************************
* Name: gd5f_readid
************************************************************************************/
static int gd5f_readid(FAR struct gd5f_dev_s *priv)
{
uint16_t manufacturer;
uint16_t deviceid;
uint16_t capacity;
finfo("priv: %p\n", priv);
/* Lock the SPI bus, configure the bus, and select this FLASH part. */
gd5f_lock(priv->dev);
SPI_SELECT(priv->dev, SPIDEV_FLASH(priv->spi_devid), true);
/* Send the "Read ID" command and read two ID bytes */
(void)SPI_SEND(priv->dev, GD5F_READ_ID);
(void)SPI_SEND(priv->dev, GD5F_DUMMY);
manufacturer = SPI_SEND(priv->dev, GD5F_DUMMY);
deviceid = SPI_SEND(priv->dev, GD5F_DUMMY);
/* De-select the FLASH and unlock the bus */
SPI_SELECT(priv->dev, SPIDEV_FLASH(priv->spi_devid), false);
gd5f_unlock(priv->dev);
finfo("manufacturer: %02x deviceid: %02x\n",
manufacturer, deviceid);
/* Check for a valid manufacturer */
if (manufacturer == GD5F_MANUFACTURER)
{
capacity = deviceid & GD5F_GD5F_CAPACITY_MASK;
if (capacity == GD5F_CAPACITY_1GBIT)
{
priv->nsectors = GD5F_NSECTORS_1GBIT;
}
else if (capacity == GD5F_CAPACITY_2GBIT)
{
priv->nsectors = GD5F_NSECTORS_2GBIT;
}
else if (capacity == GD5F_CAPACITY_4GBIT)
{
priv->nsectors = GD5F_NSECTORS_4GBIT;
}
else
{
return -ENODEV;
}
priv->sectorshift = GD5F_SECTOR_SHIFT;
priv->pageshift = GD5F_PAGE_SHIFT;
return OK;
}
return -ENODEV;
}
/************************************************************************************
* Name: gd5f_waitstatus
************************************************************************************/
static bool gd5f_waitstatus(FAR struct gd5f_dev_s *priv, uint8_t mask, bool successif)
{
uint8_t status;
/* Loop as long as the memory is busy with a write cycle */
do
{
/* Select this FLASH part */
SPI_SELECT(priv->dev, SPIDEV_FLASH(priv->spi_devid), true);
/* Get feature command */
(void)SPI_SEND(priv->dev, GD5F_GET_FEATURE);
(void)SPI_SEND(priv->dev, GD5F_STATUS);
status = SPI_SEND(priv->dev, GD5F_DUMMY);
/* Deselect the FLASH */
SPI_SELECT(priv->dev, SPIDEV_FLASH(priv->spi_devid), false);
usleep(1000);
}
while ((status & GD5F_SR_OIP) != 0);
finfo("Complete %02x\n", status);
return successif ? ((status & mask) != 0) : ((status & mask) == 0);
}
/************************************************************************************
* Name: gd5f_writeenable
************************************************************************************/
static inline void gd5f_writeenable(FAR struct gd5f_dev_s *priv)
{
/* Select this FLASH part */
SPI_SELECT(priv->dev, SPIDEV_FLASH(priv->spi_devid), true);
/* Send Write Enable command */
(void)SPI_SEND(priv->dev, GD5F_WRITE_ENABLE);
/* Deselect the FLASH */
SPI_SELECT(priv->dev, SPIDEV_FLASH(priv->spi_devid), false);
}
/************************************************************************************
* Name: gd5f_writedisable
************************************************************************************/
static inline void gd5f_writedisable(FAR struct gd5f_dev_s *priv)
{
/* Select this FLASH part */
SPI_SELECT(priv->dev, SPIDEV_FLASH(priv->spi_devid), true);
/* Send Write Enable command */
(void)SPI_SEND(priv->dev, GD5F_WRITE_DISABLE);
/* Deselect the FLASH */
SPI_SELECT(priv->dev, SPIDEV_FLASH(priv->spi_devid), false);
}
/************************************************************************************
* Name: gd5f_sectorerase (128K)
************************************************************************************/
static bool gd5f_sectorerase(FAR struct gd5f_dev_s *priv, off_t startsector)
{
const uint32_t block = startsector << (priv->sectorshift - priv->pageshift);
finfo("block sector: %08lx\n", (long)block);
/* Send write enable instruction */
gd5f_writeenable(priv);
/* Select this FLASH part */
SPI_SELECT(priv->dev, SPIDEV_FLASH(priv->spi_devid), true);
/* Send the Block Erase instruction */
(void)SPI_SEND(priv->dev, GD5F_BLOCK_ERASE);
(void)SPI_SEND(priv->dev, (block >> 16) & 0xff);
(void)SPI_SEND(priv->dev, (block >> 8) & 0xff);
(void)SPI_SEND(priv->dev, block & 0xff);
/* De-select the FLASH */
SPI_SELECT(priv->dev, SPIDEV_FLASH(priv->spi_devid), false);
finfo("Erased\n");
return gd5f_waitstatus(priv, GD5F_SR_E_FAIL, false);
}
/************************************************************************************
* Name: gd5f_erase
************************************************************************************/
static int gd5f_erase(FAR struct mtd_dev_s *dev, off_t startblock, size_t nblocks)
{
FAR struct gd5f_dev_s *priv = (FAR struct gd5f_dev_s *)dev;
size_t blocksleft = nblocks;
finfo("Erase: startblock: %08lx nblocks: %d\n", (long)startblock, (int)nblocks);
/* Lock access to the SPI bus until we complete the erase */
gd5f_lock(priv->dev);
/* Wait all operations complete */
gd5f_waitstatus(priv, GD5F_SR_OIP, false);
while (blocksleft > 0)
{
if (!gd5f_sectorerase(priv, startblock))
{
break;
}
startblock++;
blocksleft--;
}
gd5f_unlock(priv->dev);
return nblocks - blocksleft;
}
/************************************************************************************
* Name: gd5f_readbuffer
************************************************************************************/
static void gd5f_readbuffer(FAR struct gd5f_dev_s *priv, uint32_t address,
uint8_t *buffer, size_t length)
{
const uint16_t offset = address & ((1 << priv->pageshift) - 1);
/* Select the FLASH */
SPI_SELECT(priv->dev, SPIDEV_FLASH(priv->spi_devid), true);
(void)SPI_SEND(priv->dev, GD5F_READ_FROM_CACHE);
/* Send the address high byte first. */
(void)SPI_SEND(priv->dev, (offset >> 8) & 0xff);
(void)SPI_SEND(priv->dev, (offset) & 0xff);
/* Send a dummy byte */
(void)SPI_SEND(priv->dev, GD5F_DUMMY);
/* Then read all of the requested bytes */
SPI_RECVBLOCK(priv->dev, buffer, length);
/* Deselect the FLASH */
SPI_SELECT(priv->dev, SPIDEV_FLASH(priv->spi_devid), false);
}
/************************************************************************************
* Name: gd5f_read_page
************************************************************************************/
static bool gd5f_read_page(FAR struct gd5f_dev_s *priv, uint32_t pageaddress)
{
const uint32_t row = pageaddress >> priv->pageshift;
/* Select this FLASH part */
SPI_SELECT(priv->dev, SPIDEV_FLASH(priv->spi_devid), true);
/* Send the Read Page instruction */
(void)SPI_SEND(priv->dev, GD5F_PAGE_READ);
(void)SPI_SEND(priv->dev, (row >> 16) & 0xff);
(void)SPI_SEND(priv->dev, (row >> 8) & 0xff);
(void)SPI_SEND(priv->dev, row & 0xff);
/* Deselect the FLASH */
SPI_SELECT(priv->dev, SPIDEV_FLASH(priv->spi_devid), false);
/* Wait Page Read Complete */
gd5f_waitstatus(priv, GD5F_SR_OIP, false);
/* Check HardWare ECC result */
gd5f_eccstatusread(priv);
if ((priv->eccstatus & GD5F_FEATURE_ECC_MASK) == GD5F_FEATURE_ECC_ERROR)
{
/* ECC report uncorrectable, discard data */
return false;
}
return true;
}
/************************************************************************************
* Name: gd5f_read
************************************************************************************/
static ssize_t gd5f_read(FAR struct mtd_dev_s *dev, off_t offset, size_t nbytes,
FAR uint8_t *buffer)
{
FAR struct gd5f_dev_s *priv = (FAR struct gd5f_dev_s *)dev;
size_t bytesleft = nbytes;
uint32_t position = offset;
finfo("Read: offset: %08lx nbytes: %d\n", (long)offset, (int)nbytes);
/* Lock the SPI bus and select this FLASH part */
gd5f_lock(priv->dev);
/* Wait all operations complete */
gd5f_waitstatus(priv, GD5F_SR_OIP, false);
while (bytesleft)
{
const uint32_t pageaddress = (position >> priv->pageshift) << priv->pageshift;
const uint32_t spaceleft = pageaddress + (1 << priv->pageshift) - position;
const size_t chunklength = bytesleft < spaceleft ? bytesleft : spaceleft;
if (!gd5f_read_page(priv, pageaddress))
{
break;
}
gd5f_readbuffer(priv, position, buffer, chunklength);
position += chunklength;
buffer += chunklength;
bytesleft -= chunklength;
}
gd5f_unlock(priv->dev);
finfo("return nbytes: %d\n", (int)(nbytes - bytesleft));
return nbytes - bytesleft;
}
/**************************************************************************
* Name: gd5f_bread
**************************************************************************/
static ssize_t gd5f_bread(FAR struct mtd_dev_s *dev, off_t startblock,
size_t nblocks, FAR uint8_t *buffer)
{
ssize_t nbytes;
FAR struct gd5f_dev_s *priv = (FAR struct gd5f_dev_s *)dev;
finfo("Bread: startblock: %08lx nblocks: %d\n",
(long)startblock, (int)nblocks);
nbytes = gd5f_read(dev, startblock << priv->pageshift,
nblocks << priv->pageshift, buffer);
if (nbytes > 0)
{
nbytes >>= priv->pageshift;
}
return nbytes;
}
/************************************************************************************
* Name: gd5f_write_to_cache
************************************************************************************/
static void gd5f_write_to_cache(FAR struct gd5f_dev_s *priv, uint32_t address,
const uint8_t *buffer, size_t length)
{
const uint16_t offset = address & ((1 << priv->pageshift) - 1);
/* Select the FLASH */
SPI_SELECT(priv->dev, SPIDEV_FLASH(priv->spi_devid), true);
/* Send the Program Load command */
(void)SPI_SEND(priv->dev, GD5F_PROGRAM_LOAD);
/* Send the address high byte first. */
(void)SPI_SEND(priv->dev, (offset >> 8) & 0xff);
(void)SPI_SEND(priv->dev, (offset) & 0xff);
/* Send block of bytes */
SPI_SNDBLOCK(priv->dev, buffer, length);
/* De-select the FLASH */
SPI_SELECT(priv->dev, SPIDEV_FLASH(priv->spi_devid), false);
}
/************************************************************************************
* Name: gd5f_execute_write
************************************************************************************/
static bool gd5f_execute_write(FAR struct gd5f_dev_s *priv, uint32_t pageaddress)
{
const uint32_t row = pageaddress >> priv->pageshift;
/* Select this FLASH part */
SPI_SELECT(priv->dev, SPIDEV_FLASH(priv->spi_devid), true);
/* Send the Program Execute instruction */
(void)SPI_SEND(priv->dev, GD5F_PROGRAM_EXECUTE);
(void)SPI_SEND(priv->dev, (row >> 16) & 0xff);
(void)SPI_SEND(priv->dev, (row >> 8) & 0xff);
(void)SPI_SEND(priv->dev, row & 0xff);
/* De-select the FLASH */
SPI_SELECT(priv->dev, SPIDEV_FLASH(priv->spi_devid), false);
return gd5f_waitstatus(priv, GD5F_SR_P_FAIL, false);
}
/************************************************************************************
* Name: gd5f_write
************************************************************************************/
static ssize_t gd5f_write(FAR struct mtd_dev_s *dev, off_t offset, size_t nbytes,
FAR const uint8_t *buffer)
{
FAR struct gd5f_dev_s *priv = (FAR struct gd5f_dev_s *)dev;
size_t bytesleft = nbytes;
uint32_t position = offset;
finfo("Write: offset: %08lx nbytes: %d \n", (long)offset, (int)nbytes);
gd5f_lock(priv->dev);
/* Wait all operations complete */
gd5f_waitstatus(priv, GD5F_SR_OIP, false);
while (bytesleft)
{
const uint32_t pageaddress = (position >> priv->pageshift) << priv->pageshift;
const uint32_t spaceleft = pageaddress + (1 << priv->pageshift) - position;
const size_t chunklength = bytesleft < spaceleft ? bytesleft : spaceleft;
gd5f_write_to_cache(priv, position, buffer, chunklength);
gd5f_writeenable(priv);
if (!gd5f_execute_write(priv, pageaddress))
{
break;
}
position += chunklength;
buffer += chunklength;
bytesleft -= chunklength;
}
gd5f_unlock(priv->dev);
return nbytes - bytesleft;
}
/**************************************************************************
* Name: gd5f_bwrite
**************************************************************************/
static ssize_t gd5f_bwrite(FAR struct mtd_dev_s *dev, off_t startblock,
size_t nblocks, FAR const uint8_t *buffer)
{
ssize_t nbytes;
FAR struct gd5f_dev_s *priv = (FAR struct gd5f_dev_s *)dev;
finfo("Bwrite: startblock: %08lx nblocks: %d\n",
(long)startblock, (int)nblocks);
/* Lock the SPI bus and write all of the pages to FLASH */
nbytes = gd5f_write(dev, startblock << priv->pageshift,
nblocks << priv->pageshift, buffer);
if (nbytes > 0)
{
nbytes >>= priv->pageshift;
}
return nbytes;
}
/************************************************************************************
* Name: mx25l_ioctl
************************************************************************************/
static int gd5f_ioctl(FAR struct mtd_dev_s *dev, int cmd, unsigned long arg)
{
FAR struct gd5f_dev_s *priv = (FAR struct gd5f_dev_s *)dev;
int ret = -EINVAL;
finfo("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)
{
geo->blocksize = (1 << priv->pageshift);
geo->erasesize = (1 << priv->sectorshift);
geo->neraseblocks = priv->nsectors;
ret = OK;
finfo("blocksize: %d erasesize: %d neraseblocks: %d\n",
geo->blocksize, geo->erasesize, geo->neraseblocks);
}
}
break;
case MTDIOC_BULKERASE:
{
/* Erase the entire device */
ret = gd5f_erase(dev, 0, priv->nsectors);
}
break;
case MTDIOC_ECCSTATUS:
{
uint8_t *result = (uint8_t *)arg;
*result =
(priv->eccstatus & GD5F_FEATURE_ECC_MASK) >> GD5F_FEATURE_ECC_OFFSET;
ret = OK;
}
break;
default:
ret = -ENOTTY; /* Bad command */
break;
}
finfo("return %d\n", ret);
return ret;
}
/************************************************************************************
* Name: gd5f_eccstatusread
************************************************************************************/
static inline void gd5f_eccstatusread(FAR struct gd5f_dev_s *priv)
{
SPI_SELECT(priv->dev, SPIDEV_FLASH(priv->spi_devid), true);
(void)SPI_SEND(priv->dev, GD5F_GET_FEATURE);
(void)SPI_SEND(priv->dev, GD5F_STATUS);
priv->eccstatus = SPI_SEND(priv->dev, GD5F_DUMMY);
SPI_SELECT(priv->dev, SPIDEV_FLASH(priv->spi_devid), false);
}
/************************************************************************************
* Name: gd5f_enable_ecc
************************************************************************************/
static inline void gd5f_enable_ecc(FAR struct gd5f_dev_s *priv)
{
uint8_t secure_otp = GD5F_SOTP_ECC;
gd5f_lock(priv->dev);
gd5f_writeenable(priv);
SPI_SELECT(priv->dev, SPIDEV_FLASH(priv->spi_devid), true);
(void)SPI_SEND(priv->dev, GD5F_SET_FEATURE);
(void)SPI_SEND(priv->dev, GD5F_SECURE_OTP);
(void)SPI_SEND(priv->dev, secure_otp);
SPI_SELECT(priv->dev, SPIDEV_FLASH(priv->spi_devid), false);
gd5f_writedisable(priv);
gd5f_unlock(priv->dev);
}
/************************************************************************************
* Name: gd5f_unlockblocks
************************************************************************************/
static inline void gd5f_unlockblocks(FAR struct gd5f_dev_s *priv)
{
uint8_t blockprotection = 0x00;
gd5f_lock(priv->dev);
gd5f_writeenable(priv);
SPI_SELECT(priv->dev, SPIDEV_FLASH(priv->spi_devid), true);
(void)SPI_SEND(priv->dev, GD5F_SET_FEATURE);
(void)SPI_SEND(priv->dev, GD5F_BLOCK_PROTECTION);
(void)SPI_SEND(priv->dev, blockprotection);
SPI_SELECT(priv->dev, SPIDEV_FLASH(priv->spi_devid), false);
gd5f_writedisable(priv);
gd5f_unlock(priv->dev);
}
/************************************************************************************
* Public Functions
************************************************************************************/
/************************************************************************************
* Name: gd5f_initialize
*
* Description:
* Create an initialize MTD device instance. 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).
*
************************************************************************************/
FAR struct mtd_dev_s *gd5f_initialize(FAR struct spi_dev_s *dev,
uint32_t spi_devid)
{
FAR struct gd5f_dev_s *priv;
int ret;
finfo("dev: %p\n", dev);
priv = (FAR struct gd5f_dev_s *)kmm_zalloc(sizeof(struct gd5f_dev_s));
if (priv)
{
/* Initialize the allocated structure. (unsupported methods were
* nullified by kmm_zalloc).
*/
priv->mtd.erase = gd5f_erase;
priv->mtd.bread = gd5f_bread;
priv->mtd.bwrite = gd5f_bwrite;
priv->mtd.ioctl = gd5f_ioctl;
priv->mtd.name = "gd5f";
priv->dev = dev;
priv->spi_devid = spi_devid;
/* De-select the FLASH */
SPI_SELECT(dev, SPIDEV_FLASH(priv->spi_devid), false);
/* Reset the flash */
SPI_SELECT(priv->dev, SPIDEV_FLASH(priv->spi_devid), true);
(void)SPI_SEND(priv->dev, GD5F_RESET);
SPI_SELECT(priv->dev, SPIDEV_FLASH(priv->spi_devid), false);
/* Wait reset complete */
gd5f_waitstatus(priv, GD5F_SR_OIP, false);
/* Identify the FLASH chip and get its capacity */
ret = gd5f_readid(priv);
if (ret != OK)
{
/* Unrecognized! Discard all of that work we just did and return NULL */
ferr("ERROR: Unrecognized\n");
kmm_free(priv);
return NULL;
}
gd5f_enable_ecc(priv);
gd5f_waitstatus(priv, GD5F_SR_OIP, false);
gd5f_unlockblocks(priv);
}
/* Return the implementation-specific state structure as the MTD device */
finfo("Return %p\n", priv);
return (FAR struct mtd_dev_s *)priv;
}
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