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nuttx/drivers/spi/qspi_flash.c

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/****************************************************************************
* drivers/spi/qspi_flash.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <assert.h>
#include <errno.h>
#include <debug.h>
#include <string.h>
#include <nuttx/kmalloc.h>
#include <nuttx/spi/qspi_flash.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* Configuration ************************************************************/
/* Define the FLASH SIZE in bytes */
#ifdef CONFIG_QSPI_FLASH_1M
# define CONFIG_QSPI_FLASH_SIZE (128 * 1024)
# define CONFIG_QSPI_FLASH_CAPACITY 0x11
#ifndef CONFIG_QSPI_FLASH_SECTORSIZE
# define CONFIG_QSPI_FLASH_SECTORSIZE 2048
#endif
#endif
#ifdef CONFIG_QSPI_FLASH_8M
# define CONFIG_QSPI_FLASH_SIZE (1024 * 1024)
# define CONFIG_QSPI_FLASH_CAPACITY 0x14
#endif
#ifdef CONFIG_QSPI_FLASH_32M
# define CONFIG_QSPI_FLASH_SIZE (4 * 1024 * 1024)
# define CONFIG_QSPI_FLASH_CAPACITY 0x16
#endif
#ifdef CONFIG_QSPI_FLASH_64M
# define CONFIG_QSPI_FLASH_SIZE (8 * 1024 * 1024)
# define CONFIG_QSPI_FLASH_CAPACITY 0x17
#endif
#ifdef CONFIG_QSPI_FLASH_128M
# define CONFIG_QSPI_FLASH_SIZE (16 * 1024 * 1024)
# define CONFIG_QSPI_FLASH_CAPACITY 0x18
#endif
#ifndef CONFIG_QSPI_FLASH_MANUFACTURER
# define CONFIG_QSPI_FLASH_MANUFACTURER 0x20
#endif
#ifndef CONFIG_QSPI_FLASH_MEMORY_TYPE
# define CONFIG_QSPI_FLASH_MEMORY_TYPE 0xba
#endif
#ifndef CONFIG_QSPI_FLASH_SECTORSIZE
# define CONFIG_QSPI_FLASH_SECTORSIZE 65536
#endif
#ifndef CONFIG_QSPI_FLASH_SUBSECTORSIZE
# define CONFIG_QSPI_FLASH_SUBSECTORSIZE 4096
#endif
#ifndef CONFIG_QSPI_FLASH_SECTORSIZE_MASK
# define CONFIG_QSPI_FLASH_SECTORSIZE_MASK (~(CONFIG_QSPI_FLASH_SECTORSIZE-1))
#endif
#ifndef CONFIG_QSPI_FLASH_SUBSECTORSIZE_MASK
# define CONFIG_QSPI_FLASH_SUBSECTORSIZE_MASK (~(CONFIG_QSPI_FLASH_SUBSECTORSIZE-1))
#endif
#ifndef CONFIG_QSPI_FLASH_PAGESIZE
# define CONFIG_QSPI_FLASH_PAGESIZE 256
#endif
#ifndef CONFIG_QSPI_FLASH_PAGESIZE_MASK
# define CONFIG_QSPI_FLASH_PAGESIZE_MASK (CONFIG_QSPI_FLASH_PAGESIZE-1)
#endif
/* Define FLASH States */
#define QSPI_FLASH_STATE_IDLE 0
#define QSPI_FLASH_STATE_RDID1 1
#define QSPI_FLASH_STATE_RDID2 2
#define QSPI_FLASH_STATE_RDID3 3
#define QSPI_FLASH_STATE_WREN 4
#define QSPI_FLASH_STATE_RDSR 5
#define QSPI_FLASH_STATE_SE1 6
#define QSPI_FLASH_STATE_SE2 7
#define QSPI_FLASH_STATE_SE3 8
#define QSPI_FLASH_STATE_PP1 9
#define QSPI_FLASH_STATE_PP2 10
#define QSPI_FLASH_STATE_PP3 11
#define QSPI_FLASH_STATE_PP4 12
#define QSPI_FLASH_STATE_READ1 13
#define QSPI_FLASH_STATE_READ2 14
#define QSPI_FLASH_STATE_READ3 15
#define QSPI_FLASH_STATE_READ4 16
#define QSPI_FLASH_STATE_FREAD_WAIT 17
/* Instructions */
/* Command Value N Description Addr Dummy Data */
#define QSPI_FLASH_WREN 0x06 /* 1 Write Enable 0 0 0 */
#define QSPI_FLASH_WRDI 0x04 /* 1 Write Disable 0 0 0 */
#define QSPI_FLASH_RDID 0x9f /* 1 Read Identification 0 0 1-3 */
#define QSPI_FLASH_RDSR 0x05 /* 1 Read Status Register 0 0 >=1 */
#define QSPI_FLASH_WRSR 0x01 /* 1 Write Status Register 0 0 1 */
#define QSPI_FLASH_READ 0x03 /* 1 Read Data Bytes 3 0 >=1 */
#define QSPI_FLASH_FAST_READ 0x0b /* 1 Higher speed read 3 1 >=1 */
#define QSPI_FLASH_PP 0x02 /* 1 Page Program 3 0 1-256 */
#define QSPI_FLASH_SE 0xd8 /* 1 Sector Erase 3 0 0 */
#define QSPI_FLASH_BE 0xc7 /* 1 Bulk Erase 0 0 0 */
#define QSPI_FLASH_DP 0xb9 /* 2 Deep power down 0 0 0 */
#define QSPI_FLASH_RES 0xab /* 2 Read Electronic
* Signature 0 3 >=1 */
#define QSPI_FLASH_SSE 0x20 /* 3 Sub-Sector Erase 0 0 0 */
#define QSPI_FLASH_ID 0x9f /* JEDEC ID */
#define QSPI_FLASH_READ_QUAD 0xeb
#define QSPI_FLASH_DUMMY 0xa5
#define QSPI_FLASH_WREN_SET 0x02
/****************************************************************************
* Private Types
****************************************************************************/
struct qspi_flashdev_s
{
struct qspi_dev_s spidev; /* Externally visible part of the SPI interface */
uint32_t selected; /* SPIn base address */
int wren;
int state;
uint16_t read_data;
uint8_t last_cmd;
unsigned long address;
unsigned char data[CONFIG_QSPI_FLASH_SIZE];
};
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
/* QSPI methods */
static int qspi_flash_lock(FAR struct qspi_dev_s *dev, bool lock);
static uint32_t qspi_flash_setfrequency(FAR struct qspi_dev_s *dev,
uint32_t frequency);
static void qspi_flash_setmode(FAR struct qspi_dev_s *dev,
enum qspi_mode_e mode);
static void qspi_flash_setbits(FAR struct qspi_dev_s *dev, int nbits);
static int qspi_flash_command(FAR struct qspi_dev_s *dev,
FAR struct qspi_cmdinfo_s *cmd);
static int qspi_flash_memory(FAR struct qspi_dev_s *dev,
FAR struct qspi_meminfo_s *mem);
static FAR void *qspi_flash_alloc(FAR struct qspi_dev_s *dev,
size_t buflen);
static void qspi_flash_free(FAR struct qspi_dev_s *dev,
FAR void *buffer);
static void qspi_flash_writeword(FAR struct qspi_flashdev_s *priv,
uint16_t data,
FAR struct qspi_cmdinfo_s *cmdinfo);
/****************************************************************************
* Private Data
****************************************************************************/
static const struct qspi_ops_s g_qspiops =
{
qspi_flash_lock, /* lock */
qspi_flash_setfrequency, /* setfrequency */
qspi_flash_setmode, /* setmode */
qspi_flash_setbits, /* setbits */
#ifdef CONFIG_QSPI_HWFEATURES
NULL, /* hwfeatures */
#endif
qspi_flash_command, /* command */
qspi_flash_memory, /* memory */
qspi_flash_alloc, /* alloc */
qspi_flash_free /* free */
};
struct qspi_flashdev_s g_qspidev =
{
{
&g_qspiops
}
};
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: qspi_flash_lock
*
* Description:
* On SPI buses where there are multiple devices, it will be necessary to
* lock SPI to have exclusive access to the buses for a sequence of
* transfers. The bus should be locked before the chip is selected. After
* locking the SPI bus, the caller should then also call the setfrequency,
* setbits, and setmode methods to make sure that the SPI is properly
* configured for the device. If the SPI bus is being shared, then it
* may have been left in an incompatible state.
*
* Input Parameters:
* dev - Device-specific state data
* lock - true: Lock spi bus, false: unlock SPI bus
*
* Returned Value:
* None
*
****************************************************************************/
static int qspi_flash_lock(FAR struct qspi_dev_s *dev, bool lock)
{
return OK;
}
/****************************************************************************
* Name: qspi_flash_memory
*
* Description:
* Perform QSPI Memory transaction operations
*
* Returned Value:
* Always returns zero
*
****************************************************************************/
int qspi_flash_memory(FAR struct qspi_dev_s *dev,
FAR struct qspi_meminfo_s *mem)
{
FAR struct qspi_flashdev_s *priv = (FAR struct qspi_flashdev_s *)dev;
switch (mem->cmd)
{
case QSPI_FLASH_READ_QUAD:
priv->wren = 0;
memcpy(mem->buffer, &priv->data[mem->addr], mem->buflen);
priv->address += mem->addr + mem->buflen;
priv->state = QSPI_FLASH_STATE_IDLE;
break;
case QSPI_FLASH_PP:
if (priv->wren)
{
memcpy(&priv->data[mem->addr], mem->buffer, mem->buflen);
}
break;
default:
return -EINVAL;
}
return 0;
}
/****************************************************************************
* Name: qspi_flash_setfrequency
*
* Description:
* Set the SPI frequency.
*
* Input Parameters:
* dev - Device-specific state data
* frequency - The SPI frequency requested
*
* Returned Value:
* Returns the actual frequency selected
*
****************************************************************************/
static uint32_t qspi_flash_setfrequency(FAR struct qspi_dev_s *dev,
uint32_t frequency)
{
return frequency;
}
/****************************************************************************
* Name: qspi_flash_setmode
*
* Description:
* Set the SPI mode. see enum spi_mode_e for mode definitions
*
* Input Parameters:
* dev - Device-specific state data
* mode - The SPI mode requested
*
* Returned Value:
* Returns the actual frequency selected
*
****************************************************************************/
static void qspi_flash_setmode(FAR struct qspi_dev_s *dev,
enum qspi_mode_e mode)
{
}
/****************************************************************************
* Name: qspi_flash_setbits
*
* Description:
* Set the number of bits per word.
*
* Input Parameters:
* dev - Device-specific state data
* nbits - The number of bits requested
*
* Returned Value:
* None
*
****************************************************************************/
static void qspi_flash_setbits(FAR struct qspi_dev_s *dev, int nbits)
{
}
/****************************************************************************
* Name: qspi_flash_alloc
*
* Description:
* Allocate a buffer and associate it with the QSPI device
*
* Input Parameters:
* dev - Device-specific state data
* buflen - Length of buffer to allocate
*
* Returned Value:
* None
*
****************************************************************************/
static FAR void *qspi_flash_alloc(FAR struct qspi_dev_s *dev, size_t buflen)
{
return kmm_malloc(buflen);
}
/****************************************************************************
* Name: qspi_flash_free
*
* Description:
* Allocate a buffer and associate it with the QSPI device
*
* Input Parameters:
* dev - Device-specific state data
* buflen - Length of buffer to allocate
*
* Returned Value:
* None
*
****************************************************************************/
static void qspi_flash_free(FAR struct qspi_dev_s *dev, FAR void *buffer)
{
kmm_free(buffer);
}
/****************************************************************************
* Name: qspi_flash_sectorerase
*
* Description:
* Erase one sector
*
* Input Parameters:
* priv - Device-specific state data
*
* Returned Value:
* None
*
****************************************************************************/
static void qspi_flash_sectorerase(FAR struct qspi_flashdev_s *priv)
{
uint32_t address;
uint32_t len = 0;
/* Ensure the WREN bit is set before any erase operation */
if (priv->wren)
{
address = priv->address;
if (priv->last_cmd == QSPI_FLASH_SE)
{
address &= CONFIG_QSPI_FLASH_SECTORSIZE_MASK;
len = CONFIG_QSPI_FLASH_SECTORSIZE;
}
else if (priv->last_cmd == QSPI_FLASH_SSE)
{
address &= CONFIG_QSPI_FLASH_SUBSECTORSIZE_MASK;
len = CONFIG_QSPI_FLASH_SUBSECTORSIZE;
}
/* Now perform the erase */
memset(&priv->data[address], 0xff, len);
}
}
/****************************************************************************
* Name: qspi_flash_writeword
*
* Description:
* Write a word (byte in our case) to the FLASH state machine.
*
* Input Parameters:
* dev - Device-specific state data
* data - the data to send to the simulated FLASH
*
* Returned Value:
* None
*
****************************************************************************/
static void qspi_flash_writeword(FAR struct qspi_flashdev_s *priv,
uint16_t data,
FAR struct qspi_cmdinfo_s *cmdinfo)
{
switch (priv->state)
{
case QSPI_FLASH_STATE_IDLE:
priv->last_cmd = data;
priv->read_data = 0xff;
switch (data)
{
case QSPI_FLASH_WREN:
priv->wren = 1;
break;
case QSPI_FLASH_WRDI:
priv->wren = 0;
break;
/* Sector / Subsector erase */
case QSPI_FLASH_SE:
case QSPI_FLASH_SSE:
priv->address = cmdinfo->addr;
/* Now perform the sector or sub-sector erase.
* Really this should be done during the deselect,
* but this is just a simulation .
*/
qspi_flash_sectorerase(priv);
break;
/* Bulk Erase */
case QSPI_FLASH_BE:
priv->state = QSPI_FLASH_STATE_IDLE;
if (priv->wren)
{
memset(priv->data, 0xff, CONFIG_QSPI_FLASH_SIZE);
}
break;
default:
break;
}
break;
default:
priv->state = QSPI_FLASH_STATE_IDLE;
priv->read_data = 0xff;
break;
}
}
/****************************************************************************
* Name: qspi_flash_command
*
* Description:
* Perform QSPI Command operations
*
* Returned Value:
* Always returns zero
*
****************************************************************************/
static int qspi_flash_command(FAR struct qspi_dev_s *dev,
FAR struct qspi_cmdinfo_s *cmdinfo)
{
FAR uint8_t *p_buf;
FAR struct qspi_flashdev_s *priv = (FAR struct qspi_flashdev_s *)dev;
DEBUGASSERT(cmdinfo->cmd < 256);
/* Does data accompany the command? */
if (QSPICMD_ISDATA(cmdinfo->flags))
{
DEBUGASSERT(cmdinfo->buffer != NULL && cmdinfo->buflen > 0);
p_buf = (FAR uint8_t *)cmdinfo->buffer;
/* Read or write operation? */
if (QSPICMD_ISWRITE(cmdinfo->flags))
{
/* Write data operation */
qspi_flash_writeword(priv, cmdinfo->cmd, cmdinfo);
}
else
{
/* Read data operation */
switch (cmdinfo->cmd)
{
case QSPI_FLASH_ID:
p_buf[0] = CONFIG_QSPI_FLASH_MANUFACTURER;
p_buf[1] = CONFIG_QSPI_FLASH_MEMORY_TYPE;
p_buf[2] = CONFIG_QSPI_FLASH_CAPACITY;
break;
case QSPI_FLASH_RDSR:
p_buf[0] = priv->wren == 1 ? QSPI_FLASH_WREN_SET : 0;
break;
}
}
}
else
{
/* Write data operation */
qspi_flash_writeword(priv, cmdinfo->cmd, cmdinfo);
}
return 0;
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: qspi_flash_initialize
*
* Description:
* Initialize the selected SPI port
*
* Returned Value:
* Valid SPI device structure reference on success; a NULL on failure
*
****************************************************************************/
FAR struct qspi_dev_s *qspi_flash_initialize(void)
{
FAR struct qspi_flashdev_s *priv = NULL;
priv = &g_qspidev;
priv->selected = 0;
priv->wren = 0;
priv->address = 0;
priv->state = QSPI_FLASH_STATE_IDLE;
priv->read_data = 0xff;
priv->last_cmd = 0xff;
memset(&priv->data[0], 0xff, sizeof(priv->data));
return (FAR struct qspi_dev_s *)priv;
}
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