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rt-thread/components/drivers/spi/spi_flash_sst25vfxx.c

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/*
* File : spi_flash_sst25vfxx.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2006 - 2011, RT-Thread Development Team
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Change Logs:
* Date Author Notes
* 2011-12-16 aozima the first version
*/
#include <stdint.h>
#include "spi_flash_sst25vfxx.h"
#define FLASH_DEBUG
#ifdef FLASH_DEBUG
#define FLASH_TRACE rt_kprintf
#else
#define FLASH_TRACE(...)
#endif /* #ifdef FLASH_DEBUG */
/* JEDEC Manufacturer¡¯s ID */
#define MF_ID (0xBF)
/* JEDEC Device ID : Memory Type */
#define MT_ID (0x25)
/* JEDEC Device ID: Memory Capacity */
#define MC_ID_SST25VF020B (0x8C) /* 2Mbit */
#define MC_ID_SST25VF040B (0x8D) /* 4Mbit */
#define MC_ID_SST25VF080B (0x8E) /* 8Mbit */
#define MC_ID_SST25VF016B (0x41) /* 16Mbit */
#define MC_ID_SST25VF032B (0x4A) /* 32Mbit */
#define MC_ID_SST25VF064C (0x4B) /* 64Mbit */
/* command list */
#define CMD_RDSR (0x05)
#define CMD_WRSR (0x01)
#define CMD_EWSR (0x50)
#define CMD_WRDI (0x04)
#define CMD_WREN (0x06)
#define CMD_READ (0x03)
#define CMD_FAST_READ (0x0B)
#define CMD_BP (0x02)
#define CMD_AAIP (0xAD)
#define CMD_ERASE_4K (0x20)
#define CMD_ERASE_32K (0x52)
#define CMD_ERASE_64K (0xD8)
#define CMD_ERASE_full (0xC7)
#define CMD_JEDEC_ID (0x9F)
#define CMD_EBSY (0x70)
#define CMD_DBSY (0x80)
#define DUMMY (0xFF)
static struct spi_flash_sst25vfxx spi_flash_sst25vfxx;
static uint8_t sst25vfxx_read_status(struct spi_flash_sst25vfxx * spi_flash)
{
return rt_spi_sendrecv8(spi_flash->rt_spi_device, CMD_RDSR);
}
static void sst25vfxx_wait_busy(struct spi_flash_sst25vfxx * spi_flash)
{
while( sst25vfxx_read_status(spi_flash) & (0x01));
}
/** \brief write N page on [page]
*
* \param page uint32_t unit : byte (4096 * N,1 page = 4096byte)
* \param buffer const uint8_t*
* \param size uint32_t unit : byte ( 4096*N )
* \return uint32_t
*
*/
static uint32_t sst25vfxx_page_write(struct spi_flash_sst25vfxx * spi_flash, uint32_t page, const uint8_t * buffer, uint32_t size)
{
uint32_t index;
uint32_t need_wirte = size;
uint8_t send_buffer[6];
page &= ~0xFFF; // page size = 4096byte
send_buffer[0] = CMD_WREN;
rt_spi_send(spi_flash->rt_spi_device, send_buffer, 1);
send_buffer[0] = CMD_ERASE_4K;
send_buffer[1] = (page >> 16);
send_buffer[2] = (page >> 8);
send_buffer[3] = (page);
rt_spi_send(spi_flash->rt_spi_device, send_buffer, 4);
sst25vfxx_wait_busy(spi_flash); // wait erase done.
send_buffer[0] = CMD_WREN;
rt_spi_send(spi_flash->rt_spi_device, send_buffer, 1);
send_buffer[0] = CMD_AAIP;
send_buffer[1] = (uint8_t)(page >> 16);
send_buffer[2] = (uint8_t)(page >> 8);
send_buffer[3] = (uint8_t)(page);
send_buffer[4] = *buffer++;
send_buffer[5] = *buffer++;
need_wirte -= 2;
rt_spi_send(spi_flash->rt_spi_device, send_buffer, 6);
sst25vfxx_wait_busy(spi_flash);
for(index=0; index < need_wirte/2; index++)
{
send_buffer[0] = CMD_AAIP;
send_buffer[1] = *buffer++;
send_buffer[2] = *buffer++;
rt_spi_send(spi_flash->rt_spi_device, send_buffer, 3);
sst25vfxx_wait_busy(spi_flash);
}
send_buffer[0] = CMD_WRDI;
rt_spi_send(spi_flash->rt_spi_device, send_buffer, 1);
return size;
}
/* RT-Thread device interface */
static rt_err_t sst25vfxx_flash_init(rt_device_t dev)
{
return RT_EOK;
}
static rt_err_t sst25vfxx_flash_open(rt_device_t dev, rt_uint16_t oflag)
{
rt_err_t result;
uint8_t send_buffer[2];
struct spi_flash_sst25vfxx * spi_flash = (struct spi_flash_sst25vfxx *)dev;
/* lock spi flash */
result = rt_mutex_take(&(spi_flash->lock), RT_WAITING_FOREVER);
if(result != RT_EOK)
{
return result;
}
send_buffer[0] = CMD_DBSY;
rt_spi_send(spi_flash->rt_spi_device, send_buffer, 1);
send_buffer[0] = CMD_EWSR;
rt_spi_send(spi_flash->rt_spi_device, send_buffer, 1);
send_buffer[0] = CMD_WRSR;
send_buffer[1] = 0;
rt_spi_send(spi_flash->rt_spi_device, send_buffer, 2);
/* release lock */
rt_mutex_release(&(spi_flash->lock));
return RT_EOK;
}
static rt_err_t sst25vfxx_flash_close(rt_device_t dev)
{
return RT_EOK;
}
static rt_err_t sst25vfxx_flash_control(rt_device_t dev, rt_uint8_t cmd, void *args)
{
struct spi_flash_sst25vfxx * spi_flash;
spi_flash = (struct spi_flash_sst25vfxx *)dev;
RT_ASSERT(dev != RT_NULL);
if (cmd == RT_DEVICE_CTRL_BLK_GETGEOME)
{
struct rt_device_blk_geometry *geometry;
geometry = (struct rt_device_blk_geometry *)args;
if (geometry == RT_NULL) return -RT_ERROR;
geometry->bytes_per_sector = spi_flash->geometry.bytes_per_sector;
geometry->sector_count = spi_flash->geometry.sector_count;
geometry->block_size = spi_flash->geometry.block_size;
}
return RT_EOK;
}
static rt_size_t sst25vfxx_flash_read(rt_device_t dev, rt_off_t pos, void* buffer, rt_size_t size)
{
rt_err_t result;
uint8_t send_buffer[4];
struct spi_flash_sst25vfxx * spi_flash = (struct spi_flash_sst25vfxx *)dev;
uint32_t offset = pos * spi_flash->geometry.bytes_per_sector;
/* lock spi flash */
result = rt_mutex_take(&(spi_flash->lock), RT_WAITING_FOREVER);
if(result != RT_EOK)
{
return 0;
}
send_buffer[0] = CMD_WRDI;
rt_spi_send(spi_flash->rt_spi_device, send_buffer, 1);
send_buffer[0] = CMD_READ;
send_buffer[1] = (uint8_t)(offset>>16);
send_buffer[2] = (uint8_t)(offset>>8);
send_buffer[3] = (uint8_t)(offset);
rt_spi_send_then_recv(spi_flash->rt_spi_device, send_buffer, 4, buffer, size * spi_flash->geometry.bytes_per_sector);
/* release lock */
rt_mutex_release(&(spi_flash->lock));
return size;
}
static rt_size_t sst25vfxx_flash_write(rt_device_t dev, rt_off_t pos, const void* buffer, rt_size_t size)
{
uint32_t i;
rt_err_t result;
const uint8_t * write_buffer = buffer;
struct spi_flash_sst25vfxx * spi_flash = (struct spi_flash_sst25vfxx *)dev;
/* lock spi flash */
result = rt_mutex_take(&(spi_flash->lock), RT_WAITING_FOREVER);
if(result != RT_EOK)
{
return 0;
}
for(i=0; i<size; i++)
{
sst25vfxx_page_write(spi_flash,
(pos + i) * spi_flash->geometry.bytes_per_sector,
write_buffer,
spi_flash->geometry.bytes_per_sector);
write_buffer += spi_flash->geometry.bytes_per_sector;
}
/* release lock */
rt_mutex_release(&(spi_flash->lock));
return size;
}
rt_err_t sst25vfxx_init(const char * flash_device_name, const char * spi_device_name)
{
struct rt_spi_device * rt_spi_device;
struct spi_flash_sst25vfxx * spi_flash = &spi_flash_sst25vfxx;
rt_spi_device = (struct rt_spi_device *)rt_device_find(spi_device_name);
if(rt_spi_device == RT_NULL)
{
FLASH_TRACE("spi device %s not found!\r\n", spi_device_name);
return -RT_ENOSYS;
}
spi_flash->rt_spi_device = rt_spi_device;
/* config spi */
{
struct rt_spi_configuration cfg;
cfg.data_width = 8;
cfg.mode = RT_SPI_MODE_0 | RT_SPI_MSB; /* SPI Compatible: Mode 0 and Mode 3 */
cfg.max_hz = 50000000; /* 50M */
rt_spi_configure(spi_flash->rt_spi_device, &cfg);
}
/* init flash */
{
rt_uint8_t cmd;
rt_uint8_t id_recv[3];
cmd = CMD_WRDI;
rt_spi_send(spi_flash->rt_spi_device, &cmd, 1);
/* read flash id */
cmd = CMD_JEDEC_ID;
rt_spi_send_then_recv(spi_flash->rt_spi_device, &cmd, 1, id_recv, 3);
if(id_recv[0] != MF_ID || id_recv[1] != MT_ID)
{
FLASH_TRACE("Manufacturer¡¯s ID or Memory Type error!\r\n");
FLASH_TRACE("JEDEC Read-ID Data : %02X %02X %02X\r\n", id_recv[0], id_recv[1], id_recv[2]);
return -RT_ENOSYS;
}
spi_flash->geometry.bytes_per_sector = 4096;
spi_flash->geometry.block_size = 4096; /* block erase: 4k */
if(id_recv[2] == MC_ID_SST25VF020B)
{
FLASH_TRACE("SST25VF020B detection\r\n");
spi_flash->geometry.sector_count = 64;
}
else if(id_recv[2] == MC_ID_SST25VF040B)
{
FLASH_TRACE("SST25VF040B detection\r\n");
spi_flash->geometry.sector_count = 128;
}
else if(id_recv[2] == MC_ID_SST25VF080B)
{
FLASH_TRACE("SST25VF080B detection\r\n");
spi_flash->geometry.sector_count = 256;
}
else if(id_recv[2] == MC_ID_SST25VF016B)
{
FLASH_TRACE("SST25VF016B detection\r\n");
spi_flash->geometry.sector_count = 512;
}
else if(id_recv[2] == MC_ID_SST25VF032B)
{
FLASH_TRACE("SST25VF032B detection\r\n");
spi_flash->geometry.sector_count = 1024;
}
else if(id_recv[2] == MC_ID_SST25VF064C)
{
FLASH_TRACE("SST25VF064C detection\r\n");
spi_flash->geometry.sector_count = 2048;
}
else
{
FLASH_TRACE("Memory Capacity error!\r\n");
return -RT_ENOSYS;
}
}
/* initialize mutex lock */
rt_mutex_init(&spi_flash->lock, flash_device_name, RT_IPC_FLAG_PRIO);
/* register device */
spi_flash->flash_device.type = RT_Device_Class_Block;
spi_flash->flash_device.init = sst25vfxx_flash_init;
spi_flash->flash_device.open = sst25vfxx_flash_open;
spi_flash->flash_device.close = sst25vfxx_flash_close;
spi_flash->flash_device.read = sst25vfxx_flash_read;
spi_flash->flash_device.write = sst25vfxx_flash_write;
spi_flash->flash_device.control = sst25vfxx_flash_control;
/* no private */
spi_flash->flash_device.user_data = RT_NULL;
rt_device_register(&spi_flash->flash_device, flash_device_name,
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_STANDALONE);
return RT_EOK;
}
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