FL2440移植LINUX-3.4.2 （七）--驱动移植LCD（移植自己写的和移植内核自带的）
移植；
1.编译
2.解决错误
2.1头文件不对：去掉或更改
2.2宏不对：改名，使用新宏
2.3 函数没有了：改名使用新函数
（一）：移植自己写的LCD驱动：
修改内核配置：
│ Location: │
│ -> Device Drivers │
│ -> Graphics support │
│ -> Support for frame buffer devices (FB [=y])
│ <M> S3C2410 LCD framebuffer support
一定选上这个：
│ -> Device Drivers │
│ -> Graphics support │
│ -> Console display driver support
<*> Framebuffer Console support
make zImage
make modules
使用最新的根文件系统
cd linux-3.4.2/drivers/video
拷贝这三个模块到网络文件系统下：
cfbcopyarea.ko cfbfillrect.ko cfbimgblt.ko
启动新系统：
/ # insmod cfbcopyarea.ko
/ # insmod cfbimgblt.ko
/ # insmod cfbfillrect.ko
/ # insmod lcd.ko
lcd移植成功。
（二）下面把内核自带的Lcd驱动编译到内核里面：
修改内核mach-smdk2440.c文件：
1 /* LCD driver info */
2
3 static struct s3c2410fb_display smdk2440_lcd_cfg __initdata = {
4
5 .lcdcon5 = S3C2410_LCDCON5_FRM565 |
6 S3C2410_LCDCON5_INVVLINE |
7 S3C2410_LCDCON5_INVVFRAME |
8 S3C2410_LCDCON5_PWREN |
9 S3C2410_LCDCON5_HWSWP,
10
11 .type = S3C2410_LCDCON1_TFT,
12
13 .width = 480, /* by zhutao */
14 .height = 272, /* by zhutao */
15
16 /*Set value from LCD datasheet, pixclock set refer to
17 *document linux-3.0/Documentation/fb/framebuffer.txt */
18 #if 0
19 .pixclock = 166667, // HCLK 60 MHz, divisor 10
20 .xres = 240,
21 .yres = 320,
22 .bpp = 16,
23 .left_margin = 20,
24 .right_margin = 8,
25 .hsync_len = 4,
26 .upper_margin = 8,
27 .lower_margin = 7,
28 .vsync_len = 4,
29 #endif
30 /* by zhutao */
31 .pixclock = 111111, /* Dclk-Period =>1000000/Dclk=1000000/9*/
32 .xres = 480, /* Hsync Display Period =>Thd 480*/
33 .yres = 272, /* Vsync Display Period =>Tvd 272*/
34 .bpp = 16, /* 16 bpp*/
35 .left_margin = 2, /* Hsync Front-Porch =>Thf 2*/
36 .right_margin = 2, /* Hsync Back-Porch =>Thb 2*/
37 .hsync_len = 40, /* Hsync Pulse Width =>Thp 41*/
38 .upper_margin = 2, /* Vsync Front-Porch =>Tvf 2*/
39 .lower_margin = 2, /* Vsync Back-Porch =>Tvb 2*/
40 .vsync_len = 10, /* Vsync Pulse Width =>Tvp 10*/
41 /* by zhutao */
42 };
43
44 static struct s3c2410fb_mach_info smdk2440_fb_info __initdata = {
45 .displays = &smdk2440_lcd_cfg,
46 .num_displays = 1,
47 .default_display = 0,
48
49 #if 0
50 /* currently setup by downloader */
51 .gpccon = 0xaa940659,
52 .gpccon_mask = 0xffffffff,
53 .gpcup = 0x0000ffff,
54 .gpcup_mask = 0xffffffff,
55 .gpdcon = 0xaa84aaa0,
56 .gpdcon_mask = 0xffffffff,
57 .gpdup = 0x0000faff,
58 .gpdup_mask = 0xffffffff,
59 #endif
60
61 // .lpcsel = ((0xCE6) & ~7) | 1<<4, /* by zhutao */
62 .lpcsel = ((0xCE6) & ~7) | 1<<1, /* by zhutao */
修改内核配置：
│ Location: │
│ -> Device
Drivers
│
│ -> Graphics
support
│
│ -> Support for frame buffer devices (FB [=y])
│ <*> S3C2410 LCD framebuffer support
如果选上这个将会在lcd上显示linux的LOGO：
Location:
│
│ -> Device
Drivers
│
│ -> Graphics support
│ [*] Bootup logo --->
编译内核，启动，就有小企鹅了。
