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rt-thread-official/components/drivers/spi/spi_flash_gd.c

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/*
* File : spi_flash_gd.c
* This file is part of RT-Thread RTOS
* Copyright (c) 2016 Shanghai Fullhan Microelectronics Co., Ltd.
* All rights reserved
*
* 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
* 2015-10-11 fullhan copy from winbond flash
*/
#include <stdint.h>
#include <rtthread.h>
#include <rtdevice.h>
#include "spi_flash.h"
#include "spi_flash_gd.h"
#define FLASH_DEBUG
#ifdef FLASH_DEBUG
#define FLASH_TRACE rt_kprintf
#else
#define FLASH_TRACE(...)
#endif /* #ifdef FLASH_DEBUG */
#define PAGE_SIZE 4096
/* JEDEC Manufacturer's ID */
#define MF_ID (0xC8)
/* JEDEC Device ID: Memory type and Capacity */
#define MTC_GD25Q128 (0x4018)
/* 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 DUMMY (0xFF)
static struct spi_flash_device spi_flash_device;
static void flash_lock(struct spi_flash_device * flash_device)
{
rt_mutex_take(&flash_device->lock, RT_WAITING_FOREVER);
}
static void flash_unlock(struct spi_flash_device * flash_device)
{
rt_mutex_release(&flash_device->lock);
}
static uint8_t w25qxx_read_status(void)
{
return rt_spi_sendrecv8(spi_flash_device.rt_spi_device, CMD_RDSR1);
}
static void w25qxx_wait_busy(void)
{
while( w25qxx_read_status() & (0x01));
}
/** \brief read [size] byte from [offset] to [buffer]
*
* \param offset uint32_t unit : byte
* \param buffer uint8_t*
* \param size uint32_t unit : byte
* \return uint32_t byte for read
*
*/
static uint32_t w25qxx_read(uint32_t offset, uint8_t * buffer, uint32_t size)
{
uint8_t send_buffer[4];
send_buffer[0] = CMD_WRDI;
rt_spi_send(spi_flash_device.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_device.rt_spi_device,
send_buffer, 4,
buffer, size);
return size;
}
/** \brief write N page on [page]
*
* \param page_addr uint32_t unit : byte (4096 * N,1 page = 4096byte)
* \param buffer const uint8_t*
* \return uint32_t
*
*/
static uint32_t w25qxx_page_write(uint32_t page_addr, const uint8_t* buffer)
{
uint32_t index;
uint8_t send_buffer[4];
RT_ASSERT((page_addr&0xFF) == 0); /* page addr must align to 256byte. */
send_buffer[0] = CMD_WREN;
rt_spi_send(spi_flash_device.rt_spi_device, send_buffer, 1);
send_buffer[0] = CMD_ERASE_4K;
send_buffer[1] = (page_addr >> 16);
send_buffer[2] = (page_addr >> 8);
send_buffer[3] = (page_addr);
rt_spi_send(spi_flash_device.rt_spi_device, send_buffer, 4);
w25qxx_wait_busy(); // wait erase done.
for(index=0; index < (PAGE_SIZE / 256); index++)
{
send_buffer[0] = CMD_WREN;
rt_spi_send(spi_flash_device.rt_spi_device, send_buffer, 1);
send_buffer[0] = CMD_PP;
send_buffer[1] = (uint8_t)(page_addr >> 16);
send_buffer[2] = (uint8_t)(page_addr >> 8);
send_buffer[3] = (uint8_t)(page_addr);
rt_spi_send_then_send(spi_flash_device.rt_spi_device,
send_buffer,
4,
buffer,
256);
buffer += 256;
page_addr += 256;
w25qxx_wait_busy();
}
send_buffer[0] = CMD_WRDI;
rt_spi_send(spi_flash_device.rt_spi_device, send_buffer, 1);
return PAGE_SIZE;
}
/* RT-Thread device interface */
static rt_err_t w25qxx_flash_init(rt_device_t dev)
{
return RT_EOK;
}
static rt_err_t w25qxx_flash_open(rt_device_t dev, rt_uint16_t oflag)
{
uint8_t send_buffer[3];
flash_lock((struct spi_flash_device *)dev);
send_buffer[0] = CMD_WREN;
rt_spi_send(spi_flash_device.rt_spi_device, send_buffer, 1);
send_buffer[0] = CMD_WRSR;
send_buffer[1] = 0;
send_buffer[2] = 0;
rt_spi_send(spi_flash_device.rt_spi_device, send_buffer, 3);
w25qxx_wait_busy();
flash_unlock((struct spi_flash_device *)dev);
return RT_EOK;
}
static rt_err_t w25qxx_flash_close(rt_device_t dev)
{
return RT_EOK;
}
static rt_err_t w25qxx_flash_control(rt_device_t dev, int cmd, void *args)
{
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_device.geometry.bytes_per_sector;
geometry->sector_count = spi_flash_device.geometry.sector_count;
geometry->block_size = spi_flash_device.geometry.block_size;
}
return RT_EOK;
}
static rt_size_t w25qxx_flash_read(rt_device_t dev,
rt_off_t pos,
void* buffer,
rt_size_t size)
{
flash_lock((struct spi_flash_device *)dev);
w25qxx_read(pos*spi_flash_device.geometry.bytes_per_sector,
buffer,
size*spi_flash_device.geometry.bytes_per_sector);
flash_unlock((struct spi_flash_device *)dev);
return size;
}
static rt_size_t w25qxx_flash_write(rt_device_t dev,
rt_off_t pos,
const void* buffer,
rt_size_t size)
{
rt_size_t i = 0;
rt_size_t block = size;
const uint8_t * ptr = buffer;
flash_lock((struct spi_flash_device *)dev);
while(block--)
{
w25qxx_page_write((pos + i)*spi_flash_device.geometry.bytes_per_sector,
ptr);
ptr += PAGE_SIZE;
i++;
}
flash_unlock((struct spi_flash_device *)dev);
return size;
}
rt_err_t gd_init(const char * flash_device_name, const char * spi_device_name)
{
struct rt_spi_device * rt_spi_device;
/* initialize mutex */
if (rt_mutex_init(&spi_flash_device.lock, spi_device_name, RT_IPC_FLAG_FIFO) != RT_EOK)
{
rt_kprintf("init sd lock mutex failed\n");
return -RT_ENOSYS;
}
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_device.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 = 50 * 1000 * 1000; /* 50M */
rt_spi_configure(spi_flash_device.rt_spi_device, &cfg);
}
/* init flash */
{
rt_uint8_t cmd;
rt_uint8_t id_recv[3];
uint16_t memory_type_capacity;
flash_lock(&spi_flash_device);
cmd = 0xFF; /* reset SPI FLASH, cancel all cmd in processing. */
rt_spi_send(spi_flash_device.rt_spi_device, &cmd, 1);
cmd = CMD_WRDI;
rt_spi_send(spi_flash_device.rt_spi_device, &cmd, 1);
/* read flash id */
cmd = CMD_JEDEC_ID;
rt_spi_send_then_recv(spi_flash_device.rt_spi_device, &cmd, 1, id_recv, 3);
flash_unlock(&spi_flash_device);
if(id_recv[0] != MF_ID)
{
FLASH_TRACE("Manufacturers ID 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_device.geometry.bytes_per_sector = 4096;
spi_flash_device.geometry.block_size = 4096; /* block erase: 4k */
/* get memory type and capacity */
memory_type_capacity = id_recv[1];
memory_type_capacity = (memory_type_capacity << 8) | id_recv[2];
if(memory_type_capacity == MTC_GD25Q128)
{
FLASH_TRACE("GD128 detection\r\n");
spi_flash_device.geometry.sector_count = 4096;
}
else
{
FLASH_TRACE("Memory Capacity error!\r\n");
return -RT_ENOSYS;
}
}
/* register device */
spi_flash_device.flash_device.type = RT_Device_Class_Block;
spi_flash_device.flash_device.init = w25qxx_flash_init;
spi_flash_device.flash_device.open = w25qxx_flash_open;
spi_flash_device.flash_device.close = w25qxx_flash_close;
spi_flash_device.flash_device.read = w25qxx_flash_read;
spi_flash_device.flash_device.write = w25qxx_flash_write;
spi_flash_device.flash_device.control = w25qxx_flash_control;
/* no private */
spi_flash_device.flash_device.user_data = RT_NULL;
rt_device_register(&spi_flash_device.flash_device, flash_device_name,
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_STANDALONE);
return RT_EOK;
}
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