update

code/part1/kernel/licheepi_nano_spiflash_defconfig

@@ -0,0 +1,25 @@
+CONFIG_ARM=y
+CONFIG_ARCH_SUNXI=y
+CONFIG_ENV_SIZE=0x8000
+CONFIG_ENV_OFFSET=0xf8000
+CONFIG_MACH_SUNIV=y
+CONFIG_DRAM_CLK=156
+CONFIG_DRAM_ZQ=0
+# CONFIG_VIDEO_SUNXI is not set
+CONFIG_DEFAULT_DEVICE_TREE="suniv-f1c100s-licheepi-nano"
+CONFIG_SPL=y
+# CONFIG_CMD_FLASH is not set
+# CONFIG_CMD_FPGA is not set
+CONFIG_CMD_SF=y
+CONFIG_CMD_SPI=y
+CONFIG_ENV_IS_IN_SPI_FLASH=y
+CONFIG_DM_SPI_FLASH=y
+CONFIG_SPI_FLASH=y
+CONFIG_SPI_FLASH_BAR=y
+CONFIG_SPI_FLASH_GIGADEVICE=y
+CONFIG_SPI_FLASH_MACRONIX=y
+CONFIG_SPI_FLASH_WINBOND=y
+CONFIG_SPL_SPI_SUNXI=y
+# CONFIG_SPL_DM_SERIAL is not set
+CONFIG_DM_SPI=y
+CONFIG_SUN6I_SPI=y

code/part1/kernel/licheepi_zero_defconfig

@@ -0,0 +1,160 @@
+CONFIG_LOCALVERSION="-licheepi-zero"
+# CONFIG_LOCALVERSION_AUTO is not set
+CONFIG_NO_HZ=y
+CONFIG_HIGH_RES_TIMERS=y
+CONFIG_CGROUPS=y
+CONFIG_BLK_DEV_INITRD=y
+CONFIG_PERF_EVENTS=y
+CONFIG_MODULES=y
+CONFIG_MODULE_UNLOAD=y
+CONFIG_ARCH_SUNXI=y
+# CONFIG_MACH_SUN4I is not set
+# CONFIG_MACH_SUN5I is not set
+# CONFIG_MACH_SUN6I is not set
+# CONFIG_MACH_SUN7I is not set
+# CONFIG_MACH_SUN9I is not set
+CONFIG_SMP=y
+CONFIG_HAVE_ARM_ARCH_TIMER=y
+CONFIG_NR_CPUS=8
+CONFIG_ARM_PSCI=y
+CONFIG_AEABI=y
+CONFIG_HIGHMEM=y
+CONFIG_ARM_APPENDED_DTB=y
+CONFIG_ARM_ATAG_DTB_COMPAT=y
+CONFIG_CPU_FREQ=y
+CONFIG_CPUFREQ_DT=y
+CONFIG_VFP=y
+CONFIG_NEON=y
+CONFIG_NET=y
+CONFIG_PACKET=y
+CONFIG_UNIX=y
+CONFIG_INET=y
+CONFIG_IP_PNP=y
+CONFIG_IP_PNP_DHCP=y
+CONFIG_IP_PNP_BOOTP=y
+# CONFIG_INET_XFRM_MODE_TRANSPORT is not set
+# CONFIG_INET_XFRM_MODE_TUNNEL is not set
+# CONFIG_INET_XFRM_MODE_BEET is not set
+# CONFIG_INET_DIAG is not set
+# CONFIG_IPV6 is not set
+CONFIG_CFG80211=y
+CONFIG_CFG80211_WEXT=y
+CONFIG_MAC80211=y
+CONFIG_MAC80211_LEDS=y
+CONFIG_DEVTMPFS=y
+CONFIG_DEVTMPFS_MOUNT=y
+CONFIG_MTD=y
+CONFIG_MTD_M25P80=y
+CONFIG_MTD_SPI_NOR=y
+CONFIG_SCSI=y
+CONFIG_BLK_DEV_SD=y
+CONFIG_NETDEVICES=y
+# CONFIG_NET_VENDOR_ARC is not set
+# CONFIG_NET_CADENCE is not set
+# CONFIG_NET_VENDOR_BROADCOM is not set
+# CONFIG_NET_VENDOR_CIRRUS is not set
+# CONFIG_NET_VENDOR_FARADAY is not set
+# CONFIG_NET_VENDOR_INTEL is not set
+# CONFIG_NET_VENDOR_MARVELL is not set
+# CONFIG_NET_VENDOR_MICREL is not set
+# CONFIG_NET_VENDOR_MICROCHIP is not set
+# CONFIG_NET_VENDOR_NATSEMI is not set
+# CONFIG_NET_VENDOR_SAMSUNG is not set
+# CONFIG_NET_VENDOR_SEEQ is not set
+# CONFIG_NET_VENDOR_SMSC is not set
+CONFIG_STMMAC_ETH=y
+# CONFIG_NET_VENDOR_VIA is not set
+# CONFIG_NET_VENDOR_WIZNET is not set
+# CONFIG_INPUT_MOUSEDEV is not set
+CONFIG_INPUT_EVDEV=y
+CONFIG_KEYBOARD_SUN4I_LRADC=y
+# CONFIG_INPUT_MOUSE is not set
+CONFIG_INPUT_TOUCHSCREEN=y
+CONFIG_TOUCHSCREEN_NS2009=y
+CONFIG_INPUT_MISC=y
+CONFIG_INPUT_AXP20X_PEK=y
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
+CONFIG_SERIAL_8250_NR_UARTS=8
+CONFIG_SERIAL_8250_RUNTIME_UARTS=8
+CONFIG_SERIAL_8250_DW=y
+CONFIG_SERIAL_OF_PLATFORM=y
+# CONFIG_HW_RANDOM is not set
+CONFIG_I2C_CHARDEV=y
+CONFIG_I2C_MV64XXX=y
+CONFIG_SPI=y
+CONFIG_SPI_GPIO=y
+CONFIG_SPI_SUN6I=y
+CONFIG_GPIO_SYSFS=y
+CONFIG_POWER_SUPPLY=y
+CONFIG_AXP20X_POWER=y
+CONFIG_THERMAL=y
+CONFIG_CPU_THERMAL=y
+CONFIG_WATCHDOG=y
+CONFIG_SUNXI_WATCHDOG=y
+CONFIG_MFD_AXP20X_I2C=y
+CONFIG_MFD_AXP20X_RSB=y
+CONFIG_REGULATOR=y
+CONFIG_REGULATOR_FIXED_VOLTAGE=y
+CONFIG_REGULATOR_AXP20X=y
+CONFIG_REGULATOR_GPIO=y
+CONFIG_MEDIA_SUPPORT=y
+CONFIG_DRM=y
+CONFIG_DRM_SUN4I=y
+CONFIG_DRM_PANEL_SIMPLE=y
+CONFIG_DRM_DUMB_VGA_DAC=y
+CONFIG_FB_SIMPLE=y
+CONFIG_FB_SSD1307=y
+CONFIG_BACKLIGHT_PWM=y
+CONFIG_SOUND=y
+CONFIG_SND=y
+CONFIG_SND_SOC=y
+CONFIG_SND_SUN4I_CODEC=y
+CONFIG_SND_SUN8I_CODEC_ANALOG=y
+CONFIG_USB=y
+CONFIG_USB_EHCI_HCD=y
+CONFIG_USB_EHCI_HCD_PLATFORM=y
+CONFIG_USB_OHCI_HCD=y
+CONFIG_USB_OHCI_HCD_PLATFORM=y
+CONFIG_USB_MUSB_HDRC=y
+CONFIG_USB_MUSB_SUNXI=y
+CONFIG_NOP_USB_XCEIV=y
+CONFIG_USB_GADGET=y
+CONFIG_USB_CDC_COMPOSITE=y
+CONFIG_MMC=y
+CONFIG_MMC_SUNXI=y
+CONFIG_NEW_LEDS=y
+CONFIG_LEDS_CLASS=y
+CONFIG_LEDS_GPIO=y
+CONFIG_LEDS_TRIGGER_HEARTBEAT=y
+CONFIG_LEDS_TRIGGER_DEFAULT_ON=y
+CONFIG_RTC_CLASS=y
+# CONFIG_RTC_INTF_SYSFS is not set
+# CONFIG_RTC_INTF_PROC is not set
+CONFIG_DMADEVICES=y
+CONFIG_DMA_SUN6I=y
+CONFIG_STAGING=y
+# CONFIG_SUN8I_A23_CCU is not set
+# CONFIG_SUN8I_A33_CCU is not set
+# CONFIG_SUN8I_H3_CCU is not set
+# CONFIG_IOMMU_SUPPORT is not set
+CONFIG_EXTCON=y
+CONFIG_PWM_SUN4I=y
+CONFIG_PHY_SUN4I_USB=y
+CONFIG_NVMEM=y
+CONFIG_NVMEM_SUNXI_SID=y
+CONFIG_EXT4_FS=y
+CONFIG_VFAT_FS=y
+CONFIG_TMPFS=y
+CONFIG_NFS_FS=y
+CONFIG_NFS_V3_ACL=y
+CONFIG_NFS_V4=y
+CONFIG_ROOT_NFS=y
+CONFIG_NLS_CODEPAGE_437=y
+CONFIG_NLS_ISO8859_1=y
+CONFIG_PRINTK_TIME=y
+CONFIG_DEBUG_FS=y
+CONFIG_DEBUG_KERNEL=y
+# CONFIG_FTRACE is not set
+CONFIG_CRYPTO_CMAC=y
+CONFIG_CRYPTO_DEV_SUN4I_SS=y

code/part1/uboot/LicheePi_Zero_defconfig

@@ -0,0 +1,14 @@
+CONFIG_ARM=y
+CONFIG_ARCH_SUNXI=y
+CONFIG_MACH_SUN8I_V3S=y
+CONFIG_DRAM_CLK=360
+CONFIG_DRAM_ZQ=14779
+CONFIG_DEFAULT_DEVICE_TREE="sun8i-v3s-licheepi-zero"
+CONFIG_SPL=y
+# CONFIG_CMD_FLASH is not set
+# CONFIG_CMD_FPGA is not set
+# CONFIG_SPL_DOS_PARTITION is not set
+# CONFIG_SPL_ISO_PARTITION is not set
+# CONFIG_SPL_EFI_PARTITION is not set
+# CONFIG_NETDEVICES is not set
+CONFIG_SYS_USB_EVENT_POLL_VIA_INT_QUEUE=y

code/part1/uboot/licheepi_nano_defconfig

@@ -0,0 +1,9 @@
+CONFIG_ARM=y
+CONFIG_ARCH_SUNXI=y
+CONFIG_MACH_SUNIV=y
+CONFIG_DRAM_CLK=156
+CONFIG_DRAM_ZQ=0
+# CONFIG_VIDEO_SUNXI is not set
+CONFIG_DEFAULT_DEVICE_TREE="suniv-f1c100s-licheepi-nano"
+CONFIG_SPL=y
+# CONFIG_SPL_DM_SERIAL is not set

code/part13/mytftfb.c

@@ -0,0 +1,299 @@
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/fs.h>
+#include <linux/init.h>       
+#include <asm/io.h>          //含有ioremap函数iounmap函数
+#include <asm/uaccess.h>     //含有copy_from_user函数和含有copy_to_user函数
+#include <linux/device.h>    //含有类相关的设备函数
+#include <linux/cdev.h>
+#include <linux/platform_device.h> //包含platform函数
+#include <linux/of.h>        //包含设备树相关函数
+#include <linux/fb.h>        //包含frame buffer
+#include <linux/spi/spi.h>
+#include <linux/regmap.h>
+#include <linux/gpio.h>
+
+static struct fb_info *myfb;           //定义一个fb_info
+static struct task_struct *fb_thread;  //定义一个线程刷新屏幕
+static struct spi_device *fbspi;       //保存spi驱动指针
+static struct gpio_desc *dc_pin;       //dc引脚
+static struct gpio_desc *reset_pin;    //reset引脚
+
+static u32 pseudo_palette[16];  //调色板缓存区
+
+static void fb_write_reg(struct spi_device *spi, u8 reg)
+{
+    gpiod_set_value(dc_pin, 0); //低电平，命令
+    spi_write(spi, &reg, 1);
+}
+
+static void fb_write_data(struct spi_device *spi, u16 data)
+{   
+    u8 buf[2];
+    buf[0] = ((u8)(data>>8));
+    buf[1] = ((u8)(data&0x00ff));
+    gpiod_set_value(dc_pin, 1);  //高电平，数据
+    spi_write(spi, &buf[0], 1);
+    spi_write(spi, &buf[1], 1);   
+}
+
+static void fb_set_win(struct spi_device *spi, u8 xStar, u8 yStar,u8 xEnd,u8 yEnd)
+{
+    fb_write_reg(spi,0x2a);   
+    fb_write_data(spi,xStar);
+    fb_write_data(spi,xEnd);
+    fb_write_reg(spi,0x2b);   
+    fb_write_data(spi,yStar);
+    fb_write_data(spi,yEnd);
+    fb_write_reg(spi,0x2c); 
+}
+
+
+static void myfb_init(struct spi_device *spi)
+{
+    gpiod_set_value(reset_pin, 0); //设低电平
+    msleep(100);
+    gpiod_set_value(reset_pin, 1); //设高电平
+    msleep(50);
+        /* 写寄存器，初始化 */
+    fb_write_reg(spi,0x36);
+    fb_write_data(spi,0x0000);
+    fb_write_reg(spi,0x3A);
+    fb_write_data(spi,0x0500);
+    fb_write_reg(spi,0xB2);
+    fb_write_data(spi,0x0C0C);
+    fb_write_data(spi,0x0033);
+    fb_write_data(spi,0x3300);
+    fb_write_data(spi,0x0033);
+    fb_write_data(spi,0x3300);
+    fb_write_reg(spi,0xB7);
+    fb_write_data(spi,0x3500);
+    fb_write_reg(spi,0xB8);
+    fb_write_data(spi,0x1900);
+    fb_write_reg(spi,0xC0);
+    fb_write_data(spi,0x2C00);
+    fb_write_reg(spi,0xC2);
+    fb_write_data(spi,0xC100);
+    fb_write_reg(spi,0xC3);
+    fb_write_data(spi,0x1200);
+    fb_write_reg(spi,0xC4);
+    fb_write_data(spi,0x2000);
+    fb_write_reg(spi,0xC6);
+    fb_write_data(spi,0x0F00);
+    fb_write_reg(spi,0xD0);
+    fb_write_data(spi,0xA4A1);
+    fb_write_reg(spi,0xE0);
+    fb_write_data(spi,0xD004);
+    fb_write_data(spi,0x0D11);
+    fb_write_data(spi,0x132B);
+    fb_write_data(spi,0x3F54);
+    fb_write_data(spi,0x4C18);
+    fb_write_data(spi,0x0D0B);
+    fb_write_data(spi,0x1F23);
+    fb_write_reg(spi,0xE1);
+    fb_write_data(spi,0xD004);
+    fb_write_data(spi,0x0C11);
+    fb_write_data(spi,0x132C);
+    fb_write_data(spi,0x3F44);
+    fb_write_data(spi,0x512F);
+    fb_write_data(spi,0x1F1F);
+    fb_write_data(spi,0x2023);
+    fb_write_reg(spi,0x21);
+    fb_write_reg(spi,0x11);
+    mdelay(50);  
+    fb_write_reg(spi,0x29);
+    mdelay(200);
+
+}
+
+void fb_refresh(struct fb_info *fbi, struct spi_device *spi)
+{
+    int x, y;
+    u16 *p = (u16 *)(fbi->screen_base);
+    fb_set_win(spi, 0,0,239,239);
+    for (y = 0; y < fbi->var.yres; y++)
+    {
+        for (x = 0; x < fbi->var.xres; x++)
+        {
+            fb_write_data(spi,*p);
+            p++;
+        }
+    }
+}
+
+int thread_func_fb(void *data)
+{
+    struct fb_info *fbi = (struct fb_info *)data;
+    while (1)
+    {
+        if (kthread_should_stop())
+            break;
+        fb_refresh(fbi,fbspi);
+    }
+    return 0;
+}
+
+static inline unsigned int chan_to_field(unsigned int chan, struct fb_bitfield *bf)
+{
+    chan &= 0xffff;
+    chan >>= 16 - bf->length;
+    return chan << bf->offset;
+}
+
+static u32 pseudo_palette[16];
+
+static int myfb_setcolreg(u32 regno, u32 red,u32 green, u32 blue,u32 transp, struct fb_info *info)
+{
+    unsigned int val;
+    
+    if (regno > 16)
+    {
+        return 1;
+    }
+    val  = chan_to_field(red,   &info->var.red);
+    val |= chan_to_field(green, &info->var.green);
+    val |= chan_to_field(blue,  &info->var.blue);
+    pseudo_palette[regno] = val;
+    return 0;
+}
+
+static struct fb_ops myfb_ops = {
+    .owner      = THIS_MODULE,
+    .fb_write       = fb_sys_write,
+    .fb_setcolreg   = myfb_setcolreg,  /*设置颜色寄存器*/
+    .fb_fillrect    = sys_fillrect,         /*用像素行填充矩形框，通用库函数*/
+    .fb_copyarea    = sys_copyarea,         /*将屏幕的一个矩形区域复制到另一个区域，通用库函数*/
+    .fb_imageblit   = sys_imageblit,        /*显示一副图像，通用库函数*/
+};
+
+static void myfb_update(struct fb_info *fbi, struct list_head *pagelist)
+{
+    //比较粗暴的方式，直接全部刷新
+    fbi->fbops->fb_pan_display(&fbi->var,fbi);  //将应用层数据刷到FrameBuffer缓存中
+}
+
+static struct fb_deferred_io myfb_defio = {
+    .delay           = HZ/20,
+    .deferred_io     = &myfb_update,
+};
+
+static struct fb_var_screeninfo myfb_var = {
+    .rotate =         0,
+    .xres =           240,
+    .yres =           240,
+    .xres_virtual =   240,
+    .yres_virtual =   240,
+    .bits_per_pixel = 16,
+    .nonstd =         1,
+    /* RGB565 */
+    .red.offset =     11,
+    .red.length =     5,
+    .green.offset =   5,
+    .green.length =   6,
+    .blue.offset =    0,
+    .blue.length =    5,
+    .transp.offset =  0,
+    .transp.length =  0,
+    .activate       = FB_ACTIVATE_NOW,
+    .vmode          = FB_VMODE_NONINTERLACED,
+};
+
+static struct fb_fix_screeninfo myfb_fix = {
+    .type           = FB_TYPE_PACKED_PIXELS,
+    .visual         = FB_VISUAL_TRUECOLOR,
+    .line_length    = 240*2,//16 bit = 2byte
+    .accel          = FB_ACCEL_NONE,//没有使用硬件加速
+    .id             = "myfb",
+};
+
+static int myfb_probe(struct spi_device *spi)
+{
+    int ret;
+    void *gmem_addr;
+    u32  gmem_size;
+    fbspi = spi;  //保存spi驱动指针
+    printk(KERN_ERR"register myfb_spi_probe!\n");
+
+    dc_pin = devm_gpiod_get(&spi->dev,"dc",GPIOF_OUT_INIT_LOW);
+    if(IS_ERR(dc_pin))
+    {
+        printk(KERN_ERR"fail to request dc-gpios!\n");
+        return -1;
+    }
+    reset_pin = devm_gpiod_get(&spi->dev,"reset",GPIOF_OUT_INIT_HIGH);
+    if(IS_ERR(reset_pin))
+    {
+        printk(KERN_ERR"fail to request reset-gpios!\n");
+        return -1;
+    }
+    gpiod_direction_output(dc_pin,0);
+    gpiod_direction_output(reset_pin,1);
+
+    printk(KERN_INFO"register myfb_probe dev!\n");
+    myfb = framebuffer_alloc(sizeof(struct fb_info), &spi->dev);  //向内核申请fb_info结构体
+    //初始化底层操作结构体
+    myfb->fbops = &myfb_ops;
+    gmem_size = 240 * 240 * 2;
+    gmem_addr = kmalloc(gmem_size,GFP_KERNEL);  //分配Frame Buffer显存
+    if(!gmem_addr)
+    {
+        printk(KERN_ERR"fail to alloc fb buffer!\n");
+    }
+    myfb->pseudo_palette = pseudo_palette;
+    myfb->var = myfb_var;
+    myfb->fix = myfb_fix;
+    myfb->screen_buffer = gmem_addr;
+    myfb->screen_size = gmem_size;
+
+    myfb->fix.smem_len = gmem_size;          
+    myfb->fix.smem_start = (u32)gmem_addr;   
+    
+    memset((void *)myfb->fix.smem_start, 0, myfb->fix.smem_len); //清楚显示缓存
+    myfb_init(spi);
+    myfb->fbdefio = &myfb_defio;
+    fb_deferred_io_init(myfb);
+    ret = register_framebuffer(myfb);
+    if(ret)
+    {
+        framebuffer_release(myfb);
+        unregister_framebuffer(myfb);
+        devm_gpiod_put(&spi->dev, dc_pin);
+        devm_gpiod_put(&spi->dev, reset_pin);
+        printk(KERN_ERR"fail to register fb dev!\n");
+        return -1;
+    }
+    fb_thread= kthread_run(thread_func_fb, myfb, spi->modalias);
+    return 0;
+}
+
+int myfb_remove(struct spi_device *spi)
+{
+    fb_deferred_io_cleanup(myfb); //清除刷新机制
+    unregister_framebuffer(myfb);
+    devm_gpiod_put(&spi->dev, dc_pin);
+    devm_gpiod_put(&spi->dev, reset_pin);
+    return 0;
+}
+
+
+struct of_device_id myfb_match[] = {
+    {.compatible = "test,myfb-spi"}, 
+    {},
+};
+
+struct spi_driver myfb_drv = {
+    .probe  = myfb_probe,
+    .remove = myfb_remove,
+    .driver = {
+        .owner = THIS_MODULE,
+        .name = "myfb_spi_driver",
+        .of_match_table = myfb_match,
+    },
+};
+
+module_spi_driver(myfb_drv);
+
+MODULE_LICENSE("GPL");                  //不加的话加载会有错误提醒
+MODULE_AUTHOR("1477153217@qq.com");     //作者
+MODULE_VERSION("0.1");                  //版本
+MODULE_DESCRIPTION("myfb_spi_driver");  //简单的描述