荔枝派zero从焊接到跑起linux

步骤

焊flash芯片（如果大于16M，需要改烧录工具的源码）
焊引脚，为了串口看数据

焊接flash芯片，需要注意1号脚的位置，flash芯片在开发板背面，1号脚位置是靠近麦克风的那边

以下为编译相关步骤，参考连接，注意，下载的源码，选用spi flash模式

uboot

git clone -b v3s-spi-experimental https://github.com/Lichee-Pi/u-boot.git

make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- menuconfig
Architecture select，选ARM
Device Drivers
    SPI Flash Support
    勾选自己flash的厂家名称，这里选Macronix SPI flash support
    如果使用的是16MB以上的flash，需要勾选flash bank支持选项，否则最多只能读到16MB

code include/configs/sun8i.h，在include xxx之前添加

#define CONFIG_BOOTCOMMAND   "sf probe 0; "                           
                             "sf read 0x41800000 0x100000 0x10000; "  
                             "sf read 0x41000000 0x110000 0x400000; " 
                             "bootz 0x41000000 - 0x41800000"

 #define CONFIG_BOOTARGS      "console=ttyS0,115200 earlyprintk panic=5 rootwait " 
                             "mtdparts=spi32766.0:1M(uboot)ro,64k(dtb)ro,4M(kernel)ro,-(rootfs) root=31:03 rw rootfstype=jffs2"

编译

time make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- 2>&1 | tee build.log

下载linux内核源码

make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- licheepi_zero_defconfig
make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- menuconfig

选中

Device Drivers
    <*>Memory Technology Device (MTD) support
        <*> Command line partition table parsing 该项目用来解析uboot传递过来的flash分区信息。
        <*> SPI-NOR device Support
File systems
    <*> Miscellaneous filesystems
        <*> Journalling Flash File System v2 (JFFS2) support

code arch/arm/boot/dts/sun8i-v3s-licheepi-zero.dts

&spi0 {
        status ="okay";

        mx25l25635e:mx25l25635e@0 {
                compatible = "jedec,spi-nor";
                reg = <0x0>;
                spi-max-frequency = <50000000>;
                #address-cells = <1>;
                #size-cells = <1>;
        };

};

编译

make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- -j4
make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- dtbs
东西在在 arch/arm/boot/zImage

rootfs，以前弄过，直接用mkfs.jffs2生成文件系统了

sudo mkfs.jffs2 -s 0x100 -e 0x10000 -p 0x1AF0000 -d ~/downloads/rootfs/ -o ../jffs2.img

打包镜像

dd if=/dev/zero of=flashimg.bin bs=1M count=32
dd if=$HOME/dev/embedded/lichee/zero/SPI_Flash/u-boot/u-boot-sunxi-with-spl.bin of=flashimg.bin bs=1K conv=notrunc
dd if=$HOME/dev/embedded/lichee/zero/SPI_Flash/linux-zero-4.13.y/arch/arm/boot/dts/sun8i-v3s-licheepi-zero-dock.dtb of=flashimg.bin bs=1K seek=1024  conv=notrunc
dd if=$HOME/dev/embedded/lichee/zero/SPI_Flash/linux-zero-4.13.y/arch/arm/boot/zImage of=flashimg.bin bs=1K seek=1088  conv=notrunc
dd if=$HOME/dev/embedded/lichee/zero/SPI_Flash/jffs2.img of=flashimg.bin  bs=1K seek=5184  conv=notrunc

烧录固件

git clone -b spi-rebase https://github.com/Icenowy/sunxi-tools.git

修复超过16M的写入问题

code fel-spiflash.c，搜索

#define CMD_WRITE_ENABLE 0x06
和
aw_fel_spiflash_write_helper函数

改成如下部分

#define CMD_WRITE_ENABLE 0x06
#define SPI_FLASH_16MB_BOUN  0x1000000
# define CMD_BANKADDR_BRWR              0x17    //only SPANSION flash use it
# define CMD_BANKADDR_BRRD              0x16
# define CMD_EXTNADDR_WREAR             0xC5
# define CMD_EXTNADDR_RDEAR             0xC8
size_t bank_curr = 0;

void aw_fel_spiflash_write_helper(feldev_handle *dev,
                  uint32_t offset, void *buf, size_t len,
                  size_t erase_size, uint8_t erase_cmd,
                  size_t program_size, uint8_t program_cmd)
{
    uint8_t *buf8 = (uint8_t *)buf;
    size_t max_chunk_size = dev->soc_info->scratch_addr - dev->soc_info->spl_addr;
    size_t cmd_idx, bank_sel;

    if (max_chunk_size > 0x1000)
        max_chunk_size = 0x1000;
    uint8_t *cmdbuf = malloc(max_chunk_size);
    cmd_idx = 0;

    prepare_spi_batch_data_transfer(dev, dev->soc_info->spl_addr);
    //add bank support
    {
    cmd_idx = 0;
    bank_sel = offset /SPI_FLASH_16MB_BOUN;
    if (bank_sel == bank_curr)
        goto bar_end;

    /* Emit write enable command */
    cmdbuf[cmd_idx++] = 0;
    cmdbuf[cmd_idx++] = 1;
    cmdbuf[cmd_idx++] = CMD_WRITE_ENABLE;
    /* Emit write bank */
    cmdbuf[cmd_idx++] = 0;
    cmdbuf[cmd_idx++] = 2;
    cmdbuf[cmd_idx++] = CMD_EXTNADDR_WREAR;
    cmdbuf[cmd_idx++] = offset >> 24;
    /* Emit wait for completion */
    cmdbuf[cmd_idx++] = 0xFF;
    cmdbuf[cmd_idx++] = 0xFF;
    /* Emit the end marker */
    cmdbuf[cmd_idx++] = 0;
    cmdbuf[cmd_idx++] = 0;
    aw_fel_write(dev, cmdbuf, dev->soc_info->spl_addr, cmd_idx);
    aw_fel_remotefunc_execute(dev, NULL);
    bar_end:
        bank_curr = bank_sel;
    }
    cmd_idx = 0;

    prepare_spi_batch_data_transfer(dev, dev->soc_info->spl_addr);

    while (len > 0) {
        while (len > 0 && max_chunk_size - cmd_idx > program_size + 64) {
            if (offset % erase_size == 0) {
                /* Emit write enable command */
                cmdbuf[cmd_idx++] = 0;
                cmdbuf[cmd_idx++] = 1;
                cmdbuf[cmd_idx++] = CMD_WRITE_ENABLE;
                /* Emit erase command */
                cmdbuf[cmd_idx++] = 0;
                cmdbuf[cmd_idx++] = 4;
                cmdbuf[cmd_idx++] = erase_cmd;
                cmdbuf[cmd_idx++] = offset >> 16;
                cmdbuf[cmd_idx++] = offset >> 8;
                cmdbuf[cmd_idx++] = offset;
                /* Emit wait for completion */
                cmdbuf[cmd_idx++] = 0xFF;
                cmdbuf[cmd_idx++] = 0xFF;
            }
            /* Emit write enable command */
            cmdbuf[cmd_idx++] = 0;
            cmdbuf[cmd_idx++] = 1;
            cmdbuf[cmd_idx++] = CMD_WRITE_ENABLE;
            /* Emit page program command */
            size_t write_count = program_size;
            if (write_count > len)
                write_count = len;
            cmdbuf[cmd_idx++] = (4 + write_count) >> 8;
            cmdbuf[cmd_idx++] = 4 + write_count;
            cmdbuf[cmd_idx++] = program_cmd;
            cmdbuf[cmd_idx++] = offset >> 16;
            cmdbuf[cmd_idx++] = offset >> 8;
            cmdbuf[cmd_idx++] = offset;
            memcpy(cmdbuf + cmd_idx, buf8, write_count);
            cmd_idx += write_count;
            buf8    += write_count;
            len     -= write_count;
            offset  += write_count;
            /* Emit wait for completion */
            cmdbuf[cmd_idx++] = 0xFF;
            cmdbuf[cmd_idx++] = 0xFF;
        }
        /* Emit the end marker */
        cmdbuf[cmd_idx++] = 0;
        cmdbuf[cmd_idx++] = 0;

        /* Flush */
        aw_fel_write(dev, cmdbuf, dev->soc_info->spl_addr, cmd_idx);
        aw_fel_remotefunc_execute(dev, NULL);
        cmd_idx = 0;
    }

    free(cmdbuf);
}

make

烧录

测试是否发现flash设备
sunxi-fel version
sunxi-fel -p spiflash-write 0 ~/dev/embedded/lichee/zero/SPI_Flash/flashimg.bin

重新上电以后，是不是就看到串口有输出啦