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Linux 系统移植（五）- LED & LCD

2016-9-4 22:24:23 4465 Linux

为了直观的显示东西，所以先移植LCD 和 LED

1. 先修改mach-ok6410.c

#include
#include
/* leds */
static struct gpio_led ok6410_leds[] = {
[0] = {
.name = "led1",
.gpio = S3C64XX_GPM(0),
},
[1] = {
.name = "led2",
.gpio = S3C64XX_GPM(1),
},
[2] = {
.name = "led3",
.gpio = S3C64XX_GPM(2),
},
[3] = {
.name = "led4",
.gpio = S3C64XX_GPM(3),
},
};
static struct gpio_led_platform_data ok6410_gpio_led_pdata = {
.num_leds = ARRAY_SIZE(ok6410_leds),
.leds = ok6410_leds,
};
static struct platform_device ok6410_device_led = {
.name = "leds-gpio",
.id = -1,
.dev = {
.platform_data = &ok6410_gpio_led_pdata,
},
};
static struct fb_videomode ok6410_lcd_type0_timing = {
/* 4.3" 480x272 */
#if 0
.left_margin = 3,
.right_margin = 2,
.upper_margin = 1,
.lower_margin = 1,
.hsync_len = 40,
.vsync_len = 1,
.xres = 480,
.yres = 272,
#else
.left_margin = 2,
.right_margin = 2,
.upper_margin = 2,
.lower_margin = 2,
.hsync_len = 41,
.vsync_len = 10,
.xres = 480,
.yres = 272,
#endif
};
#if 0
static struct s3c_fb_pd_win ok6410_lcd_type1_fb_win = {
.max_bpp = 32,
.default_bpp = 16,
.xres = 800,
.yres = 480,
};
static struct fb_videomode ok6410_lcd_type1_timing = {
/* 7.0" 800x480 */
.left_margin = 8,
.right_margin = 13,
.upper_margin = 7,
.lower_margin = 5,
.hsync_len = 3,
.vsync_len = 1,
.xres = 800,
.yres = 480,
};
#endif
static struct s3c_fb_platdata ok6410_lcd_pdata[] __initdata = {
{
.setup_gpio = s3c64xx_fb_gpio_setup_24bpp,
.vtiming = &ok6410_lcd_type0_timing,
.win[0] = &ok6410_lcd_type0_fb_win,
.vidcon0 = VIDCON0_VIDOUT_RGB | VIDCON0_PNRMODE_RGB,
.vidcon1 = VIDCON1_INV_HSYNC | VIDCON1_INV_VSYNC,
},
#if 0
{
.setup_gpio = s3c64xx_fb_gpio_setup_24bpp,
.vtiming = &ok6410_lcd_type1_timing,
.win[0] = &ok6410_lcd_type1_fb_win,
.vidcon0 = VIDCON0_VIDOUT_RGB | VIDCON0_PNRMODE_RGB,
.vidcon1 = VIDCON1_INV_HSYNC | VIDCON1_INV_VSYNC,
},
#endif
{ },
};
static void ok6410_lcd_power_set(struct plat_lcd_data *pd,
unsigned int power)
{
#if 0
if (power)
gpio_direction_output(S3C64XX_GPE(0), 1);
else
gpio_direction_output(S3C64XX_GPE(0), 0);
#else
if (power) {
gpio_direction_output(S3C64XX_GPF(13), 1);
gpio_direction_output(S3C64XX_GPF(15), 1);
/* fire nRESET on power up */
gpio_direction_output(S3C64XX_GPN(5), 0);
msleep(10);
gpio_direction_output(S3C64XX_GPN(5), 1);
msleep(1);
} else {
gpio_direction_output(S3C64XX_GPF(15), 0);
gpio_direction_output(S3C64XX_GPF(13), 0);
}
#endif
}
static struct platform_device *ok6410_devices[] __initdata = {
&ok6410_device_eth,
&s3c_device_hsmmc0,
&s3c_device_hsmmc1,
&s3c_device_ohci,
&s3c_device_nand,
&s3c_device_fb,
&ok6410_lcd_powerdev,
&s3c_device_adc,
&s3c_device_ts,
&ok6410_device_led,
};
static struct map_desc ok6410_iodesc[] = {
[0] = {
/* LCD support */
.virtual = (unsigned long)S3C_VA_LCD,
.pfn = __phys_to_pfn(S3C_PA_FB),
.length = SZ_16K,
.type = MT_DEVICE,
},
};
static void __init ok6410_map_io(void)
{
u32 tmp;
//s3c64xx_init_io(NULL, 0);
s3c64xx_init_io(ok6410_iodesc, ARRAY_SIZE(ok6410_iodesc));
s3c24xx_init_clocks(12000000);
s3c24xx_init_uarts(ok6410_uartcfgs, ARRAY_SIZE(ok6410_uartcfgs));
samsung_set_timer_source(SAMSUNG_PWM3, SAMSUNG_PWM4);
/* set the LCD type */
tmp = __raw_readl(S3C64XX_SPCON);
tmp &= ~S3C64XX_SPCON_LCD_SEL_MASK;
tmp |= S3C64XX_SPCON_LCD_SEL_RGB;
__raw_writel(tmp, S3C64XX_SPCON);
/* remove the LCD bypass */
tmp = __raw_readl(S3C64XX_MODEM_MIFPCON);
tmp &= ~MIFPCON_LCD_BYPASS;
__raw_writel(tmp, S3C64XX_MODEM_MIFPCON);
}

复制代码

2. 拷贝video驱动
将厂家提供的源代码linux3.0.1中的drviers/video/samsung拷贝到drviers/video/目录下
修改drviers/video/的Kconfig文件，在文件中加入
source "drivers/video/samsung/Kconfig"
修改修改drviers/video/的Makefie文件,再最后一行添加：
obj-$(CONFIG_FB_S3C_EXT) += samsung/
在arch/ARM/plat-samsung/include/plat/map-base.h里面添加
#define S3C_VA_LCD S3C_ADDR(0x01100000) /* LCD */
在include/generated/atuoconfig.h里面添加
#define CONFIG_FB_S3C_EXT_NUM 4
把drivers/video/samsung/s3cfb_fimd4x.c里面的
s3c6410_pm_do_save(s3c_lcd_save, ARRAY_SIZE(s3c_lcd_save));
改成s3c_pm_do_save(s3c_lcd_save, ARRAY_SIZE(s3c_lcd_save));
s3c6410_pm_do_restore(s3c_lcd_save, ARRAY_SIZE(s3c_lcd_save));
改成s3c_pm_do_restore(s3c_lcd_save, ARRAY_SIZE(s3c_lcd_save));
上面这段来自：http://blog.chinaunix.net/uid-28382924-id-3484385.html
3. 接下来解决一些会产生编译错误的方法
drivers/video/samsung/s3cfb.c

//static int __init s3cfb_probe(struct platform_device *pdev)
static int s3cfb_probe(struct platform_device *pdev)

复制代码

//int __devinit s3cfb_init(void)
int __init s3cfb_init(void)

复制代码

拷贝原厂的arch/arm/plat-samsung/include/plat/regs-fb.h, regs-fb-v4.h到现在内核对应的位置
拷贝原厂的arch/arm/mach-s3c64xx/include/mach/regs-fb.h, regs-lcd.h到现在内核对应的位置
4. 内核配置
LED

Device Drivers --->

复制代码

LCD

Device Drivers --->

复制代码

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詹磊 · 2016-9-10 01:06:59 沙发最后发现，其实LCD移植是不用拷贝文件的，直接打开S3C FB选项就好了，这个在内核里已经存在，不用三星的驱动

赞 1 回复举报 SuperStone 2020-5-12 09:14 楼主不用三星的驱动怎么操作呢？赞回复举报

詹磊 · 2016-9-10 19:42:05 板凳 make modules_install INSTALL_MOD_PATH=/home/zhanlei/nfs/mouldes 复制代码模块安装

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詹磊 · 2016-9-10 19:43:57 4^# Eclipse 插入内核裁剪的宏配置 cat autoconf.h \|grep define \|awk '{print "" $2 "" $ 3 ""}' > symbol.xml 复制代码

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