mini2440_map_io -> s3c24xx_init_uarts

随后调用s3c24xx_init_uarts()->s3c2410_init_uarts()->s3c24xx_init_uartdevs()

MACHINE_START(MINI2440, "MINI2440")
    /* Maintainer: Michel Pollet <[e-mail]> */
    .boot_params    = S3C2410_SDRAM_PA + 0x100,
    .map_io        = mini2440_map_io,
    .init_machine    = mini2440_init,
    .init_irq    = s3c24xx_init_irq,
    .timer        = &s3c24xx_timer,
MACHINE_END

static void __init mini2440_map_io(void)
{
    s3c24xx_init_io(mini2440_iodesc, ARRAY_SIZE(mini2440_iodesc));
    s3c24xx_init_clocks(12000000);
    s3c24xx_init_uarts(mini2440_uartcfgs, ARRAY_SIZE(mini2440_uartcfgs));
}


void __init s3c24xx_init_uarts(struct s3c2410_uartcfg *cfg, int no)
{
    if (cpu == NULL)
        return;

    if (cpu->init_uarts == NULL) {
        printk(KERN_ERR "s3c24xx_init_uarts: cpu has no uart init\n");
    } else
        (cpu->init_uarts)(cfg, no);
}

根据cpu id找到对应的cpu_table结构，确定调用

static struct cpu_table cpu_ids[] __initdata = {
    {
        .idcode        = 0x32410000,
        .idmask        = 0xffffffff,
        .map_io        = s3c2410_map_io,
        .init_clocks    = s3c2410_init_clocks,
        .init_uarts    = s3c2410_init_uarts,
        .init        = s3c2410_init,
        .name        = name_s3c2410
    },
...
}


void __init s3c2410_init_uarts(struct s3c2410_uartcfg *cfg, int no)
{
    s3c24xx_init_uartdevs("s3c2410-uart", s3c2410_uart_resources, cfg, no);
}

struct s3c24xx_uart_resources s3c2410_uart_resources[] __initdata = {
[0] = {
.resources	= s3c2410_uart0_resource,
.nr_resources	= ARRAY_SIZE(s3c2410_uart0_resource),
},
[1] = {
.resources	= s3c2410_uart1_resource,
.nr_resources	= ARRAY_SIZE(s3c2410_uart1_resource),
},
[2] = {
.resources	= s3c2410_uart2_resource,
.nr_resources	= ARRAY_SIZE(s3c2410_uart2_resource),
},
[3] = {
.resources	= s3c2410_uart3_resource,
.nr_resources	= ARRAY_SIZE(s3c2410_uart3_resource),
},
};
				
					
static struct resource s3c2410_uart0_resource[] = {
[0] = {
.start = S3C2410_PA_UART0,
.end   = S3C2410_PA_UART0 + 0x3fff,
.flags = IORESOURCE_MEM,//内存资源
},
[1] = {
.start = IRQ_S3CUART_RX0,
.end   = IRQ_S3CUART_ERR0,
.flags = IORESOURCE_IRQ,//中断资源
}
};
					
						
					



cfg的传入值
static struct s3c2410_uartcfg mini2440_uartcfgs[] __initdata = {
[0] = {
.hwport	     = 0,
.flags	     = 0,
.ucon	     = UCON,
.ulcon	     = ULCON,
.ufcon	     = UFCON,
},
[1] = {
.hwport	     = 1,
.flags	     = 0,
.ucon	     = UCON,
.ulcon	     = ULCON,
.ufcon	     = UFCON,
},
[2] = {
.hwport	     = 2,
.flags	     = 0,
.ucon	     = UCON,
.ulcon	     = ULCON,
.ufcon	     = UFCON,
},
};

				
no 的传入值 = 3

struct platform_device *s3c24xx_uart_src[4] = {
        &s3c24xx_uart_device0,
        &s3c24xx_uart_device1,
        &s3c24xx_uart_device2,
        &s3c24xx_uart_device3,
};

static struct platform_device s3c24xx_uart_device0 = {
.id = 0,
};


static struct platform_device s3c24xx_uart_device1 = {
.id = 1,
};


static struct platform_device s3c24xx_uart_device2 = {
.id = 2,
};


static struct platform_device s3c24xx_uart_device3 = {
.id = 3,
};

void __init s3c24xx_init_uartdevs(char *name,
                 struct s3c24xx_uart_resources *res,
                 struct s3c2410_uartcfg *cfg, int no)
{
    struct platform_device *platdev;
    struct s3c2410_uartcfg *cfgptr = uart_cfgs;
    struct s3c24xx_uart_resources *resp;
    int uart;

           //把配置信息保存起来，包括对寄存器的设置值

    memcpy(cfgptr, cfg, sizeof(struct s3c2410_uartcfg) * no);

            //给平台设备s3c24xx_uart_device0，s3c24xx_uart_device1，s3c24xx_uart_device2赋值

    for (uart = 0; uart < no; uart++, cfg++, cfgptr++) {
        platdev = s3c24xx_uart_src[cfgptr->hwport];

        resp = res + cfgptr->hwport;

                /*
                    struct platform_device *s3c24xx_uart_devs[4] = {
                     };

                */

              s3c24xx_uart_devs[uart] = platdev;

              //给平台总线设备结构体赋值

        platdev->name = name;//设备名
        platdev->resource = resp->resources;//设备资源
        platdev->num_resources = resp->nr_resources;//设备所使用各类资源数量

        platdev->dev.platform_data = cfgptr;
    }

    nr_uarts = no;
}