/* * File : spi_flash_at45dbxx.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 #include "spi_flash_at45dbxx.h" #define FLASH_DEBUG #define DMA_BUFFER_SIZE 512 #ifdef FLASH_DEBUG #define FLASH_TRACE rt_kprintf #else #define FLASH_TRACE(...) #endif /**< #ifdef FLASH_DEBUG */ /* JEDEC Manufacturer¡¯s ID */ #define MF_ID (0x1F) /* atmel */ #define DENSITY_CODE_011D (0x02) /* AT45DB011D Density Code : 00010 = 1-Mbit */ #define DENSITY_CODE_021D (0x03) /* AT45DB021D Density Code : 00011 = 2-Mbit */ #define DENSITY_CODE_041D (0x04) /* AT45DB041D Density Code : 00100 = 4-Mbit */ #define DENSITY_CODE_081D (0x05) /* AT45DB081D Density Code : 00101 = 8-Mbit */ #define DENSITY_CODE_161D (0x06) /* AT45DB161D Density Code : 00110 = 16-Mbit */ #define DENSITY_CODE_321D (0x07) /* AT45DB321D Density Code : 00111 = 32-Mbit */ #define DENSITY_CODE_642D (0x08) /* AT45DB642D Density Code : 01000 = 64-Mbit */ struct JEDEC_ID { uint8_t manufacturer_id; /* Manufacturer ID */ uint8_t density_code:5; /* Density Code */ uint8_t family_code:3; /* Family Code */ uint8_t version_code:5; /* Product Version Code */ uint8_t mlc_code:3; /* MLC Code */ uint8_t byte_count; /* Byte Count */ }; #define AT45DB_BUFFER_1_WRITE 0x84 #define AT45DB_BUFFER_2_WRITE 0x87 #define AT45DB_BUFFER_1_READ 0xD4 #define AT45DB_BUFFER_2_READ 0xD6 #define AT45DB_B1_TO_MM_PAGE_PROG_WITH_ERASE 0x83 #define AT45DB_B2_TO_MM_PAGE_PROG_WITH_ERASE 0x86 #define AT45DB_MM_PAGE_TO_B1_XFER 0x53 #define AT45DB_MM_PAGE_TO_B2_XFER 0x55 #define AT45DB_PAGE_ERASE 0x81 #define AT45DB_SECTOR_ERASE 0x7C #define AT45DB_READ_STATE_REGISTER 0xD7 #define AT45DB_MM_PAGE_READ 0xD2 #define AT45DB_MM_PAGE_PROG_THRU_BUFFER1 0x82 #define AT45DB_CMD_JEDEC_ID 0x9F static struct spi_flash_at45dbxx spi_flash_at45dbxx; /*****************************************************************************/ /*Status Register Format: */ /* ------------------------------------------------------------------------- */ /* | bit7 | bit6 | bit5 | bit4 | bit3 | bit2 | bit1 | bit0 | */ /* |--------|--------|--------|--------|--------|--------|--------|--------| */ /* |RDY/BUSY| COMP | device density | X | X | */ /* ------------------------------------------------------------------------- */ /* 0:busy | | AT45DB041:0111 | protect|page size */ /* 1:ready | | AT45DB161:1011 | */ /* --------------------------------------------------------------------------*/ /*****************************************************************************/ static uint8_t AT45DB_StatusRegisterRead(void) { return rt_spi_sendrecv8(spi_flash_at45dbxx.rt_spi_device, AT45DB_READ_STATE_REGISTER); } static void wait_busy(void) { uint16_t i = 0; while (i++ < 10000) { if (AT45DB_StatusRegisterRead() & 0x80) { return; } } FLASH_TRACE("\r\nSPI_FLASH timeout!!!\r\n"); } /* RT-Thread Device Driver Interface */ static rt_err_t AT45DB_flash_init(rt_device_t dev) { return RT_EOK; } static rt_err_t AT45DB_flash_open(rt_device_t dev, rt_uint16_t oflag) { return RT_EOK; } static rt_err_t AT45DB_flash_close(rt_device_t dev) { return RT_EOK; } static rt_err_t AT45DB_flash_control(rt_device_t dev, rt_uint8_t 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 = 512; geometry->sector_count = 4096; geometry->block_size = 4096; /* block erase: 4k */ } return RT_EOK; } static rt_size_t AT45DB_flash_read_page_256(rt_device_t dev, rt_off_t pos, void* buffer, rt_size_t size) { uint32_t index, nr; uint8_t * read_buffer = buffer; nr = size; for (index = 0; index < nr; index++) { uint32_t page = pos; uint8_t send_buffer[8]; uint32_t i; for(i=0; i> 7); send_buffer[2] = (uint8_t)(page << 1); rt_spi_send_then_recv(spi_flash_at45dbxx.rt_spi_device, send_buffer, 8, read_buffer, 256); read_buffer += 256; page++; } return size; } static rt_size_t AT45DB_flash_read_page_512(rt_device_t dev, rt_off_t pos, void* buffer, rt_size_t size) { uint32_t index, nr; uint8_t * read_buffer = buffer; nr = size; for (index = 0; index < nr; index++) { uint32_t page = pos; uint8_t send_buffer[8]; uint32_t i; for(i=0; i> 6); send_buffer[2] = (uint8_t)(page << 2); rt_spi_send_then_recv(spi_flash_at45dbxx.rt_spi_device, send_buffer, 8, read_buffer, 512); read_buffer += 512; page++; } return size; } static rt_size_t AT45DB_flash_read_page_1024(rt_device_t dev, rt_off_t pos, void* buffer, rt_size_t size) { uint32_t index, nr; uint8_t * read_buffer = buffer; nr = size; for (index = 0; index < nr; index++) { uint32_t page = pos; uint8_t send_buffer[8]; uint32_t i; for(i=0; i> 5); send_buffer[2] = (uint8_t)(page << 3); rt_spi_send_then_recv(spi_flash_at45dbxx.rt_spi_device, send_buffer, 8, read_buffer, 1024); read_buffer += 1024; page++; } return size; } static rt_size_t AT45DB_flash_write_page_256(rt_device_t dev, rt_off_t pos, const void* buffer, rt_size_t size) { rt_uint32_t index, nr; const uint8_t * write_buffer = buffer; nr = size; for (index = 0; index < nr; index++) { uint32_t page = pos; uint8_t send_buffer[4]; send_buffer[0] = AT45DB_MM_PAGE_PROG_THRU_BUFFER1; send_buffer[1] = (uint8_t) (page >> 7); send_buffer[2] = (uint8_t) (page << 1); send_buffer[3] = 0; rt_spi_send_then_send(spi_flash_at45dbxx.rt_spi_device, send_buffer, 4, write_buffer, 256); write_buffer += 256; page++; wait_busy(); } return size; } static rt_size_t AT45DB_flash_write_page_512(rt_device_t dev, rt_off_t pos, const void* buffer, rt_size_t size) { rt_uint32_t index, nr; const uint8_t * write_buffer = buffer; nr = size; for (index = 0; index < nr; index++) { uint32_t page = pos; uint8_t send_buffer[4]; send_buffer[0] = AT45DB_MM_PAGE_PROG_THRU_BUFFER1; send_buffer[1] = (uint8_t) (page >> 6); send_buffer[2] = (uint8_t) (page << 2); send_buffer[3] = 0; rt_spi_send_then_send(spi_flash_at45dbxx.rt_spi_device, send_buffer, 4, write_buffer, 512); write_buffer += 512; page++; wait_busy(); } return size; } static rt_size_t AT45DB_flash_write_page_1024(rt_device_t dev, rt_off_t pos, const void* buffer, rt_size_t size) { rt_uint32_t index, nr; const uint8_t * write_buffer = buffer; nr = size; for (index = 0; index < nr; index++) { uint32_t page = pos; uint8_t send_buffer[4]; send_buffer[0] = AT45DB_MM_PAGE_PROG_THRU_BUFFER1; send_buffer[1] = (uint8_t) (page >> 5); send_buffer[2] = (uint8_t) (page << 3); send_buffer[3] = 0; rt_spi_send_then_send(spi_flash_at45dbxx.rt_spi_device, send_buffer, 4, write_buffer, 1024); write_buffer += 1024; page++; wait_busy(); } return size; } rt_err_t at45dbxx_init(const char * flash_device_name, const char * spi_device_name) { struct rt_spi_device * rt_spi_device; struct JEDEC_ID * JEDEC_ID; 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_at45dbxx.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 Modes 0 and 3 */ cfg.max_hz = 66000000; /* Atmel RapidS Serial Interface: 66MHz Maximum Clock Frequency */ rt_spi_configure(spi_flash_at45dbxx.rt_spi_device, &cfg); } /* read JEDEC ID */ { uint8_t cmd; uint8_t id_recv[6]; JEDEC_ID = (struct JEDEC_ID *)id_recv; cmd = AT45DB_CMD_JEDEC_ID; rt_spi_send_then_recv(spi_flash_at45dbxx.rt_spi_device, &cmd, 1, id_recv, 6); /**< 1FH = Atmel */ /**< 001 = Atmel DataFlash */ if(JEDEC_ID->manufacturer_id != 0x1F || JEDEC_ID->family_code != 0x01) { 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; } if(JEDEC_ID->density_code == DENSITY_CODE_011D) { /**< AT45DB011D Density Code : 00010 = 1-Mbit */ FLASH_TRACE("AT45DB011D detection\r\n"); spi_flash_at45dbxx.geometry.bytes_per_sector = 256; /* Page Erase (256 Bytes) */ spi_flash_at45dbxx.geometry.sector_count = 512; /* 1-Mbit / 8 / 256 = 512 */ spi_flash_at45dbxx.geometry.block_size = 1024*2; /* Block Erase (2-Kbytes) */ } else if(JEDEC_ID->density_code == DENSITY_CODE_021D) { /**< AT45DB021D Density Code : 00011 = 2-Mbit */ FLASH_TRACE("AT45DB021D detection\r\n"); spi_flash_at45dbxx.geometry.bytes_per_sector = 256; /* Page Erase (256 Bytes) */ spi_flash_at45dbxx.geometry.sector_count = 512*2; /* 2-Mbit / 8 / 256 = 1024 */ spi_flash_at45dbxx.geometry.block_size = 1024*2; /* Block Erase (2-Kbytes) */ } else if(JEDEC_ID->density_code == DENSITY_CODE_041D) { /**< AT45DB041D Density Code : 00100 = 4-Mbit */ FLASH_TRACE("AT45DB041D detection\r\n"); spi_flash_at45dbxx.geometry.bytes_per_sector = 256; /* Page Erase (256 Bytes) */ spi_flash_at45dbxx.geometry.sector_count = 512*4; /* 4-Mbit / 8 / 256 = 2048 */ spi_flash_at45dbxx.geometry.block_size = 1024*2; /* Block Erase (2-Kbytes) */ } else if(JEDEC_ID->density_code == DENSITY_CODE_081D) { /**< AT45DB081D Density Code : 00101 = 8-Mbit */ FLASH_TRACE("AT45DB081D detection\r\n"); spi_flash_at45dbxx.geometry.bytes_per_sector = 256; /* Page Erase (256 Bytes) */ spi_flash_at45dbxx.geometry.sector_count = 512*8; /* 8-Mbit / 8 / 256 = 4096 */ spi_flash_at45dbxx.geometry.block_size = 1024*2; /* Block Erase (2-Kbytes) */ } else if(JEDEC_ID->density_code == DENSITY_CODE_161D) { /**< AT45DB161D Density Code : 00110 = 16-Mbit */ FLASH_TRACE("AT45DB161D detection\r\n"); spi_flash_at45dbxx.geometry.bytes_per_sector = 512; /* Page Erase (512 Bytes) */ spi_flash_at45dbxx.geometry.sector_count = 256*16; /* 16-Mbit / 8 / 512 = 4096 */ spi_flash_at45dbxx.geometry.block_size = 1024*4; /* Block Erase (4-Kbytes) */ } else if(JEDEC_ID->density_code == DENSITY_CODE_321D) { /**< AT45DB321D Density Code : 00111 = 32-Mbit */ FLASH_TRACE("AT45DB321D detection\r\n"); spi_flash_at45dbxx.geometry.bytes_per_sector = 512; /* Page Erase (512 Bytes) */ spi_flash_at45dbxx.geometry.sector_count = 256*32; /* 32-Mbit / 8 / 512 = 8192 */ spi_flash_at45dbxx.geometry.block_size = 1024*4; /* Block Erase (4-Kbytes) */ } else if(JEDEC_ID->density_code == DENSITY_CODE_642D) { /**< AT45DB642D Density Code : 01000 = 64-Mbit */ FLASH_TRACE("AT45DB642D detection\r\n"); spi_flash_at45dbxx.geometry.bytes_per_sector = 1024; /* Page Erase (1 Kbyte) */ spi_flash_at45dbxx.geometry.sector_count = 128*64; /* 64-Mbit / 8 / 1024 = 8192 */ spi_flash_at45dbxx.geometry.block_size = 1024*8; /* Block Erase (8 Kbytes) */ } else { FLASH_TRACE("Memory Capacity error!\r\n"); return -RT_ENOSYS; } } /* register device */ spi_flash_at45dbxx.flash_device.type = RT_Device_Class_Block; spi_flash_at45dbxx.flash_device.init = AT45DB_flash_init; spi_flash_at45dbxx.flash_device.open = AT45DB_flash_open; spi_flash_at45dbxx.flash_device.close = AT45DB_flash_close; spi_flash_at45dbxx.flash_device.control = AT45DB_flash_control; if(JEDEC_ID->density_code == DENSITY_CODE_642D) { spi_flash_at45dbxx.flash_device.read = AT45DB_flash_read_page_1024; spi_flash_at45dbxx.flash_device.write = AT45DB_flash_write_page_1024; } else if(JEDEC_ID->density_code == DENSITY_CODE_161D || JEDEC_ID->density_code == DENSITY_CODE_321D ) { spi_flash_at45dbxx.flash_device.read = AT45DB_flash_read_page_512; spi_flash_at45dbxx.flash_device.write = AT45DB_flash_write_page_512; } else { spi_flash_at45dbxx.flash_device.read = AT45DB_flash_read_page_256; spi_flash_at45dbxx.flash_device.write = AT45DB_flash_write_page_256; } /* no private */ spi_flash_at45dbxx.flash_device.user_data = RT_NULL; rt_device_register(&spi_flash_at45dbxx.flash_device, flash_device_name, RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_STANDALONE); return RT_EOK; }