/* Following are default values for UCON, ULCON and UFCON UART registers */

#define S5PV210_UCON_DEFAULT    (S3C2410_UCON_TXILEVEL |    \

                 S3C2410_UCON_RXILEVEL |    \

                 S3C2410_UCON_TXIRQMODE |    \

                 S3C2410_UCON_RXIRQMODE |    \

                 S3C2410_UCON_RXFIFO_TOI |    \

                 S3C2443_UCON_RXERR_IRQEN)

#define S5PV210_ULCON_DEFAULT    S3C2410_LCON_CS8

#define S5PV210_UFCON_DEFAULT    (S3C2410_UFCON_FIFOMODE |    \

                 S5PV210_UFCON_TXTRIG4 |    \

                 S5PV210_UFCON_RXTRIG4)

static struct s3c2410_uartcfg smdkc110_uartcfgs[] __initdata = {

    {

        .hwport        = ,

        .flags        = ,

        .ucon        = S5PV210_UCON_DEFAULT,

        .ulcon        = S5PV210_ULCON_DEFAULT,

        .ufcon        = S5PV210_UFCON_DEFAULT,

    },

    {

        .hwport        = ,

        .flags        = ,

        .ucon        = S5PV210_UCON_DEFAULT,

        .ulcon        = S5PV210_ULCON_DEFAULT,

        .ufcon        = S5PV210_UFCON_DEFAULT,

    },

#ifndef CONFIG_FIQ_DEBUGGER

    {

        .hwport        = ,

        .flags        = ,

        .ucon        = S5PV210_UCON_DEFAULT,

        .ulcon        = S5PV210_ULCON_DEFAULT,

        .ufcon        = S5PV210_UFCON_DEFAULT,

    },

#endif

    {

        .hwport        = ,

        .flags        = ,

        .ucon        = S5PV210_UCON_DEFAULT,

        .ulcon        = S5PV210_ULCON_DEFAULT,

        .ufcon        = S5PV210_UFCON_DEFAULT,

    },

};

/*调用MACHINE_START宏

MACHINE_START和MACHINE_END框起了一个machine_desc结构体的声明并根据MACHINE_START宏的参数初始化其.nr和.name成员

并将该结构体标记编译到.arch.info.init段

在MACHINE_START和MACHINE_END宏之间可以初始化machine_desc结构体的剩余成员

*/

#ifdef CONFIG_MACH_SMDKC110

MACHINE_START(SMDKC110, "SMDKC110")

#elif CONFIG_MACH_SMDKV210

MACHINE_START(SMDKV210, "SMDKV210")

#endif

    /* Maintainer: Kukjin Kim <kgene.kim@samsung.com> */

    .phys_io    = S3C_PA_UART & 0xfff00000,

    .io_pg_offst    = (((u32)S3C_VA_UART) >> ) & 0xfffc,

    .boot_params    = S5P_PA_SDRAM + 0x100,

    .init_irq    = s5pv210_init_irq,//板级中断初始化函数

    .map_io        = smdkc110_map_io,//板级io初始化函数

    .init_machine    = smdkc110_machine_init,//板级初始化函数

    .timer        = &s5p_systimer,

MACHINE_END

static void __init smdkc110_map_io(void)

{

    s5p_init_io(NULL, , S5P_VA_CHIPID);

    s3c24xx_init_clocks();

    s5pv210_gpiolib_init();

    s3c24xx_init_uarts(smdkc110_uartcfgs, ARRAY_SIZE(smdkc110_uartcfgs));

    s5p_reserve_bootmem(smdkc110_media_devs, ARRAY_SIZE(smdkc110_media_devs));

#ifdef CONFIG_MTD_ONENAND

    s5pc110_device_onenand.name = "s5pc110-onenand";

#endif

#ifdef CONFIG_MTD_NAND

    s3c_device_nand.name = "s5pv210-nand";

#endif

    s5p_device_rtc.name = "smdkc110-rtc";

}

/* table of supported CPUs */
static struct cpu_table cpu_ids[] __initdata = {

{

        .idcode        = 0x43110000,

        .idmask        = 0xfffff000,

        .map_io        = s5pv210_map_io,

        .init_clocks    = s5pv210_init_clocks,

        .init_uarts    = s5pv210_init_uarts,

        .init        = s5pv210_init,

        .name        = name_s5pv210,

    },

};

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);//这里最终会调用上面的s5pv210_init_uarts

}

#define s5pv210_init_uarts s5pv210_common_init_uarts

/* uart registration process */

void __init s5pv210_common_init_uarts(struct s3c2410_uartcfg *cfg, int no)

{

    struct s3c2410_uartcfg *tcfg = cfg;

    u32 ucnt;

    for (ucnt = ; ucnt < no; ucnt++, tcfg++) {

        if (!tcfg->clocks) {

            tcfg->clocks = s5pv210_serial_clocks;

            tcfg->clocks_size = ARRAY_SIZE(s5pv210_serial_clocks);

        }

    }

    s3c24xx_init_uartdevs("s5pv210-uart", s5p_uart_resources, cfg, no);

}

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;

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

    for (uart = ; uart < no; uart++, cfg++, cfgptr++) {

        platdev = s3c24xx_uart_src[cfgptr->hwport];

        resp = res + cfgptr->hwport;

        s3c24xx_uart_devs[uart] = platdev;

        platdev->name = name;

        platdev->resource = resp->resources;

        platdev->num_resources = resp->nr_resources;

        platdev->dev.platform_data = cfgptr;//将cfg挂到platdev->dev.platform_data上

    }

    nr_uarts = no;

}

static int __init s3c_arch_init(void)

{

    int ret;

    // do the correct init for cpu

    if (cpu == NULL)

        panic("s3c_arch_init: NULL cpu\n");

    ret = (cpu->init)();

    if (ret != )

        return ret;

    ret = platform_add_devices(s3c24xx_uart_devs, nr_uarts);

    return ret;

}

arch_initcall(s3c_arch_init);