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Merge pull request #698 from yygg/master 

[DeviceDrivers] Add W25 MTD device driver.
This commit is contained in:
Bernard Xiong 2017-02-13 21:04:49 +08:00 committed by GitHub
parent 0a60415e75 564e7aefce
commit 60631804fa
4 changed files with 376 additions and 1 deletions
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5
components/drivers/spi/SConscript
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@ -11,7 +11,10 @@ if GetDepend('RT_USING_SPI_WIFI'):
if GetDepend('RT_USING_W25QXX'): if GetDepend('RT_USING_W25QXX'):
src_device += ['spi_flash_w25qxx.c'] src_device += ['spi_flash_w25qxx.c']
if GetDepend('RT_USING_W25QXX_MTD'):
src_device += ['spi_flash_w25qxx_mtd.c']
if GetDepend('RT_USING_ENC28J60'): if GetDepend('RT_USING_ENC28J60'):
src_device += ['enc28j60.c'] src_device += ['enc28j60.c']

10
components/drivers/spi/spi_flash.h
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@ -36,4 +36,14 @@ struct spi_flash_device
typedef struct spi_flash_device *rt_spi_flash_device_t; typedef struct spi_flash_device *rt_spi_flash_device_t;
#ifdef RT_USING_MTD_NOR
struct spi_flash_mtd
{
struct rt_mtd_nor_device mtd_device;
struct rt_spi_device * rt_spi_device;
struct rt_mutex lock;
void * user_data;
};
#endif
#endif #endif

328
components/drivers/spi/spi_flash_w25qxx_mtd.c Normal file
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@ -0,0 +1,328 @@
#include <rtthread.h>
#include <rtdevice.h>
#include "spi_flash.h"
#include "spi_flash_w25qxx_mtd.h"
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#define FLASH_DEBUG
#ifdef FLASH_DEBUG
#define FLASH_TRACE printf
#else
#define FLASH_TRACE(...)
#endif /* #ifdef FLASH_DEBUG */
/* JEDEC Manufacturer¡¯s ID */
#define MF_ID (0xEF)
/* JEDEC Device ID: Memory type and Capacity */
#define MTC_W25Q80_BV (0x4014) /* W25Q80BV */
#define MTC_W25Q16_BV_CL_CV (0x4015) /* W25Q16BV W25Q16CL W25Q16CV */
#define MTC_W25Q16_DW (0x6015) /* W25Q16DW */
#define MTC_W25Q32_BV (0x4016) /* W25Q32BV */
#define MTC_W25Q32_DW (0x6016) /* W25Q32DW */
#define MTC_W25Q64_BV_CV (0x4017) /* W25Q64BV W25Q64CV */
#define MTC_W25Q64_DW (0x4017) /* W25Q64DW */
#define MTC_W25Q128_BV (0x4018) /* W25Q128BV */
#define MTC_W25Q256_FV (TBD) /* W25Q256FV */
#define MTC_W25X80 (0x3014)
/* command list */
#define CMD_WRSR (0x01) /* Write Status Register */
#define CMD_PP (0x02) /* Page Program */
#define CMD_READ (0x03) /* Read Data */
#define CMD_WRDI (0x04) /* Write Disable */
#define CMD_RDSR1 (0x05) /* Read Status Register-1 */
#define CMD_WREN (0x06) /* Write Enable */
#define CMD_FAST_READ (0x0B) /* Fast Read */
#define CMD_ERASE_4K (0x20) /* Sector Erase:4K */
#define CMD_RDSR2 (0x35) /* Read Status Register-2 */
#define CMD_ERASE_32K (0x52) /* 32KB Block Erase */
#define CMD_JEDEC_ID (0x9F) /* Read JEDEC ID */
#define CMD_ERASE_full (0xC7) /* Chip Erase */
#define CMD_ERASE_64K (0xD8) /* 64KB Block Erase */
#define CMD_MANU_ID (0x90)
#define DUMMY (0xFF)
#define FLASH_ERASE_CMD CMD_ERASE_4K
#define FLASH_BLOCK_SIZE 4096
#define FLASH_PAGE_SIZE 256
static void w25qxx_lock(struct rt_mtd_nor_device *device)
{
struct spi_flash_mtd *mtd = (struct spi_flash_mtd *)device;
rt_mutex_take(&mtd->lock, RT_WAITING_FOREVER);
}
static void w25qxx_unlock(struct rt_mtd_nor_device *device)
{
struct spi_flash_mtd *mtd = (struct spi_flash_mtd *)device;
rt_mutex_release(&mtd->lock);
}
static rt_uint8_t w25qxx_read_status(struct rt_mtd_nor_device *device)
{
struct spi_flash_mtd *mtd = (struct spi_flash_mtd *)device;
return rt_spi_sendrecv8(mtd->rt_spi_device, CMD_RDSR1);
}
static void w25qxx_wait_busy(struct rt_mtd_nor_device *device)
{
while( w25qxx_read_status(device) & (0x01));
}
static rt_err_t w25qxx_read_id(struct rt_mtd_nor_device *device)
{
rt_uint8_t cmd;
rt_uint8_t id_recv[3];
struct spi_flash_mtd *mtd = (struct spi_flash_mtd *)device;
w25qxx_lock(device);
cmd = 0xFF; /* reset SPI FLASH, cancel all cmd in processing. */
rt_spi_send(mtd->rt_spi_device, &cmd, 1);
cmd = CMD_WRDI;
rt_spi_send(mtd->rt_spi_device, &cmd, 1);
/* read flash id */
cmd = CMD_JEDEC_ID;
rt_spi_send_then_recv(mtd->rt_spi_device, &cmd, 1, id_recv, 3);
w25qxx_unlock(device);
return (rt_uint32_t)(id_recv[0] << 16) | (id_recv[1] << 8) | id_recv[2];
}
static rt_size_t w25qxx_read(struct rt_mtd_nor_device *device, rt_off_t offset, rt_uint8_t *buffer, rt_size_t length)
{
struct spi_flash_mtd *mtd = (struct spi_flash_mtd *)device;
rt_uint8_t send_buffer[4];
if((offset + length) > device->block_end * FLASH_BLOCK_SIZE)
return 0;
w25qxx_lock(device);
send_buffer[0] = CMD_WRDI;
rt_spi_send(mtd->rt_spi_device, send_buffer, 1);
send_buffer[0] = CMD_READ;
send_buffer[1] = (rt_uint8_t)(offset>>16);
send_buffer[2] = (rt_uint8_t)(offset>>8);
send_buffer[3] = (rt_uint8_t)(offset);
rt_spi_send_then_recv(mtd->rt_spi_device,
send_buffer, 4,
buffer, length);
w25qxx_unlock(device);
return length;
}
static rt_size_t w25qxx_write(struct rt_mtd_nor_device *device, rt_off_t offset, const rt_uint8_t *buffer, rt_size_t length)
{
struct spi_flash_mtd *mtd = (struct spi_flash_mtd *)device;
rt_uint8_t send_buffer[4];
rt_uint8_t *write_ptr ;
rt_size_t write_size,write_total;
if((offset + length) > device->block_end * FLASH_BLOCK_SIZE)
return 0;
w25qxx_lock(device);
send_buffer[0] = CMD_WREN;
rt_spi_send(mtd->rt_spi_device, send_buffer, 1);
w25qxx_wait_busy(device); // wait erase done.
write_size = 0;
write_total = 0;
write_ptr = (rt_uint8_t *)buffer;
while(write_total < length)
{
send_buffer[0] = CMD_WREN;
rt_spi_send(mtd->rt_spi_device, send_buffer, 1);
//write first page...
send_buffer[0] = CMD_PP;
send_buffer[1] = (rt_uint8_t)(offset >> 16);
send_buffer[2] = (rt_uint8_t)(offset >> 8);
send_buffer[3] = (rt_uint8_t)(offset);
//address % FLASH_PAGE_SIZE + length
if(((offset & (FLASH_PAGE_SIZE - 1)) + (length - write_total)) > FLASH_PAGE_SIZE)
{
write_size = FLASH_PAGE_SIZE - (offset & (FLASH_PAGE_SIZE - 1));
}
else
{
write_size = (length - write_total);
}
rt_spi_send_then_send(mtd->rt_spi_device,
send_buffer, 4,
write_ptr + write_total, write_size);
w25qxx_wait_busy(device);
offset += write_size;
write_total += write_size;
}
send_buffer[0] = CMD_WRDI;
rt_spi_send(mtd->rt_spi_device, send_buffer, 1);
w25qxx_unlock(device);
return length;
}
static rt_err_t w25qxx_erase_block(struct rt_mtd_nor_device *device, rt_off_t offset, rt_uint32_t length)
{
struct spi_flash_mtd *mtd = (struct spi_flash_mtd *)device;
rt_uint8_t send_buffer[4];
rt_uint32_t erase_size = 0;
//offset must be ALIGN_DOWN to BLOCKSIZE
if(offset != RT_ALIGN_DOWN(offset,FLASH_BLOCK_SIZE))
return 0;
if((offset + length) > device->block_end * FLASH_BLOCK_SIZE)
return 0;
/* check length must align to block size */
if(length % device->block_size != 0)
{
rt_kprintf("param length = %d ,error\n",length);
return 0;
}
w25qxx_lock(device);
send_buffer[0] = CMD_WREN;
rt_spi_send(mtd->rt_spi_device, send_buffer, 1);
w25qxx_wait_busy(device); // wait erase done.
while (erase_size < length)
{
send_buffer[0] = CMD_ERASE_4K;
send_buffer[1] = (rt_uint8_t) (offset >> 16);
send_buffer[2] = (rt_uint8_t) (offset >> 8);
send_buffer[3] = (rt_uint8_t) (offset);
rt_spi_send(mtd->rt_spi_device, send_buffer, 4);
w25qxx_wait_busy(device); // wait erase done.
erase_size += 4096;
offset += 4096;
}
send_buffer[0] = CMD_WRDI;
rt_spi_send(mtd->rt_spi_device, send_buffer, 1);
w25qxx_unlock(device);
return RT_EOK;
}
const static struct rt_mtd_nor_driver_ops w25qxx_mtd_ops =
{
w25qxx_read_id,
w25qxx_read,
w25qxx_write,
w25qxx_erase_block,
};
rt_err_t w25qxx_mtd_init(const char *mtd_name,const char * spi_device_name)
{
rt_err_t result = RT_EOK;
rt_uint32_t id;
rt_uint8_t send_buffer[3];
struct rt_spi_device* rt_spi_device;
struct spi_flash_mtd* mtd = (struct spi_flash_mtd *)rt_malloc(sizeof(struct spi_flash_mtd));
RT_ASSERT(mtd != RT_NULL);
/* initialize mutex */
if (rt_mutex_init(&mtd->lock, mtd_name, RT_IPC_FLAG_FIFO) != RT_EOK)
{
FLASH_TRACE("init mtd lock mutex failed\n");
result = -RT_ENOSYS;
goto _error_exit;
}
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);
result = -RT_ENOSYS;
goto _error_exit;
}
mtd->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 = 20 * 1000 * 1000; /* 20 */
rt_spi_configure(rt_spi_device, &cfg);
}
/* Init Flash device */
{
w25qxx_lock(&mtd->mtd_device);
send_buffer[0] = CMD_WREN;
rt_spi_send(mtd->rt_spi_device, send_buffer, 1);
w25qxx_wait_busy(&mtd->mtd_device);
send_buffer[0] = CMD_WRSR;
send_buffer[1] = 0;
send_buffer[2] = 0;
rt_spi_send(mtd->rt_spi_device, send_buffer, 3);
w25qxx_wait_busy(&mtd->mtd_device);
w25qxx_unlock(&mtd->mtd_device);
}
id = w25qxx_read_id(&mtd->mtd_device);
mtd->mtd_device.block_size = 4096;
mtd->mtd_device.block_start = 0;
switch(id & 0xFFFF)
{
case MTC_W25Q80_BV: /* W25Q80BV */
mtd->mtd_device.block_end = 256;
break;
case MTC_W25Q16_BV_CL_CV: /* W25Q16BV W25Q16CL W25Q16CV */
case MTC_W25Q16_DW: /* W25Q16DW */
mtd->mtd_device.block_end = 512;
break;
case MTC_W25Q32_BV: /* W25Q32BV */
case MTC_W25Q32_DW: /* W25Q32DW */
mtd->mtd_device.block_end = 1024;
break;
case MTC_W25Q64_BV_CV: /* W25Q64BV W25Q64CV */
mtd->mtd_device.block_end = 2048;
break;
case MTC_W25Q128_BV: /* W25Q128BV */
mtd->mtd_device.block_end = 4086;
break;
}
mtd->mtd_device.ops = &w25qxx_mtd_ops;
rt_mtd_nor_register_device(mtd_name,&mtd->mtd_device);
return RT_EOK;
_error_exit:
if(mtd != RT_NULL)
rt_free(mtd);
return result;
}

34
components/drivers/spi/spi_flash_w25qxx_mtd.h Normal file
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@ -0,0 +1,34 @@
/*
* File : spi_flash_w25qxx.h
* 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
* 2012-08-23 aozima add flash lock.
* 2017-02-11 urey add mtd fucntion
*/
#ifndef SPI_FLASH_W25QXX_H_INCLUDED
#define SPI_FLASH_W25QXX_H_INCLUDED
#include <rtthread.h>
extern rt_err_t w25qxx_mtd_init(const char *mtd_name,const char * spi_device_name);
#endif // SPI_FLASH_W25QXX_H_INCLUDED