Merge branch 'rk3399-nxt' into all-in-one

Author: 54shady

rk3399/1p8.png

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+# Application test example
+
+## lcd_test
+
+简单的LCD测试程序,在LCD屏幕上显示彩色条纹

rk3399/3p0.png

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+#include <stdlib.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <fcntl.h>
+#include <linux/fb.h>
+#include <sys/mman.h>
+#include <sys/ioctl.h>
+
+#ifdef ANDROID_SYSTEM
+#define DEFAULT_FB_DEVICE "/dev/graphics/fb0"
+#else
+#define DEFAULT_FB_DEVICE "/dev/fb0"
+#endif
+
+/*
+ * Usage:
+ * Android:
+ * 		# stop
+ * 		./lcd_test
+ * 		# start
+ * Linux:
+ * 	./lcd_test
+ */
+int main(int argc, char *argv[])
+{
+	int fd = 0;
+	struct fb_var_screeninfo vinfo;
+	struct fb_fix_screeninfo finfo;
+	long int screensize = 0;
+	char *fbp = 0;
+	int x = 0, y = 0;
+	long int location = 0;
+
+	/* Open the file for reading and writing */
+	fd = open(DEFAULT_FB_DEVICE, O_RDWR);
+	if (fd == -1) {
+		perror("Error: cannot open framebuffer device");
+		exit(1);
+	}
+	printf("The framebuffer device was opened successfully.\n");
+
+	/* Get fixed screen information */
+	if (ioctl(fd, FBIOGET_FSCREENINFO, &finfo) == -1) {
+		perror("Error reading fixed information");
+		exit(2);
+	}
+
+	/* Get variable screen information */
+	if (ioctl(fd, FBIOGET_VSCREENINFO, &vinfo) == -1) {
+		perror("Error reading variable information");
+		exit(3);
+	}
+
+	printf("%dx%d, %dbpp\n", vinfo.xres, vinfo.yres, vinfo.bits_per_pixel);
+
+	/* Figure out the size of the screen in bytes */
+	screensize = vinfo.xres * vinfo.yres * vinfo.bits_per_pixel / 8;
+
+	/* Map the device to memory */
+	fbp = (char *)mmap(0, screensize, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
+	if (fbp < 0) {
+		perror("Error: failed to map framebuffer device to memory");
+		exit(4);
+	}
+	printf("The framebuffer device was mapped to memory successfully.\n");
+
+	/* Figure out where in memory to put the pixel */
+	for (y = 0; y < vinfo.yres; y++)
+	{
+		for (x = 0; x < vinfo.xres; x++)
+		{
+			location = (x+vinfo.xoffset) * (vinfo.bits_per_pixel/8) +
+				(y+vinfo.yoffset) * finfo.line_length;
+
+			if (vinfo.bits_per_pixel == 32)
+			{
+				*(fbp + location) = 100;// Some blue
+				*(fbp + location + 1) = 15+(x-100)/2; // A little green
+				*(fbp + location + 2) = 200-(y-100)/5;// A lot of red
+				*(fbp + location + 3) = 0;// No transparency
+			}
+			else //assume 16bpp
+			{
+				int b = 10;
+				int g = (x-100)/6; // A little green
+				int r = 31-(y-100)/16;// A lot of red
+				unsigned short int t = r<<11 | g << 5 | b;
+				*((unsigned short int*)(fbp + location)) = t;
+			}
+		}
+	}
+
+	munmap(fbp, screensize);
+	close(fd);
+	return 0;
+}

rk3399/README.md

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+# BSP for Firefly_RK3399
+
+## 分区表
+
+![默认分区表](default_storage_map.png)
+
+更新分区表方法1(烧写分区表文件)
+
+	rkdeveloptool db rk3399_loader_v1.08.106.bin
+	rkdeveloptool gpt parameter_gpt.txt
+
+parameter_gpt.txt内容如下
+
+	CMDLINE:
+	mtdparts=rk29xxnand:0x00001f40@0x00000040(loader1),0x00000080@0x00001f80(reserved1),0x00002000@0x00002000(reserved2),0x00002000@0x00004000(loader2),0x00002000@0x00006000(atf),0x00038000@0x00008000(boot:bootable),-@0x0040000(rootfs)
+
+更新分区表方法2(uboot中操作)
+
+	=> env set partitions name=rootfs,size=-,type=system
+	=> gpt write mmc 0 $partitions
+
+
+更新分区表方法3(fastboot烧写,参考官网)
+
+## U-Boot 2017.09
+
+使用ROCKCHIP官方代码
+
+	mkdir rk-linux
+	cd rk-linux
+
+	repo init --repo-url=https://github.com/rockchip-linux/repo -u https://github.com/rockchip-linux/manifests -b master
+	repo sync
+
+编译Uboot
+
+	build/mk-uboot.sh rk3399-firefly
+
+或者使用54shady的代码
+
+[Firefly_RK3399_UBOOT_Usage](https://github.com/54shady/firefly_rk3399_uboot)
+
+### 启动分析
+
+启动参数涉及下面环境变量
+
+	bootcmd=run distro_bootcmd
+
+	distro_bootcmd=for target in ${boot_targets}; do run bootcmd_${target}; done
+
+	boot_targets=mmc0 mmc1 usb0 pxe dhcp
+
+	bootcmd_mmc0=setenv devnum 0; run mmc_boot
+
+	mmc_boot=if mmc dev ${devnum}; then setenv devtype mmc; run scan_dev_for_boot_part; fi
+
+	scan_dev_for_boot_part=part list ${devtype} ${devnum} -bootable devplist; env exists devpli st || setenv devplist 1; for distro_bootpart in ${devplist}; do if fstype ${devtype} ${devn um}:${distro_bootpart} bootfstype; then run scan_dev_for_boot; fi; done
+
+	scan_dev_for_boot=echo Scanning ${devtype} ${devnum}:${distro_bootpart}...; for prefix in $ {boot_prefixes}; do run scan_dev_for_extlinux; run scan_dev_for_scripts; done;run scan_dev_ for_efi;
+
+	scan_dev_for_extlinux=if test -e ${devtype} ${devnum}:${distro_bootpart} ${prefix}extlinux/ extlinux.conf; then echo Found ${prefix}extlinux/extlinux.conf; run boot_extlinux; echo SCR IPT FAILED: continuing...; fi
+
+	boot_extlinux=sysboot ${devtype} ${devnum}:${distro_bootpart} any ${scriptaddr} ${prefix}extlinux/extlinux.conf
+
+上面环境变量最终结果
+
+	sysboot mmc 0:4 any 0x00500000 /extlinux/extlinux.conf
+
+## Kernel (4.4.16)
+
+获取代码
+
+	git clone https://github.com/54shady/firefly_rk3399_kernel.git
+
+编译出Image和dtb
+
+	./mk-kernel.sh
+
+## Rootfs
+
+	ROCKCHIP官方提供的linaro-rootfs.img即可,或是自己制作
+
+## Flash Image
+
+使用rkdeveloptool烧写所有镜像
+
+	rkdeveloptool db rk3399_loader_v1.08.106.bin
+	rkdeveloptool wl 0x40 idbloader.img
+	rkdeveloptool wl 0x4000 uboot.img
+	rkdeveloptool wl 0x6000 trust.img
+	rkdeveloptool wl 0x8000 boot.img
+	rkdeveloptool wl 0x40000 linaro-rootfs.img
+	rkdeveloptool rd
+
+进入uboot后,写入gpt
+
+	gpt write mmc 0 $partitions
+
+文件build/extlinux/rk3399.conf内容如下
+
+	label kernel-4.4
+		kernel /Image
+		fdt /rk3399-firefly-linux.dtb
+		append  earlyprintk console=ttyFIQ0,115200 rw root=PARTUUID=b921b045-1d rootfstype=ext4 init=/sbin/init rootwait