linux phy driver

Linux内核DM9161系列PHY芯片扩展

Linux目录下相关目录为：

linux-2.6.30/Documentation/networking/phy.txt                           关于PHY的介绍

linux-2.6.30/drivers/net/phy/davicom.c                                        DAVICOM芯片相关

linux-2.6.30/include/linux/phy.h                                                    phy头文件定义

 

davicom.c 文件的部分代码如下：

static struct phy_driver dm9161e_driver = {
        .phy_id         = 0x0181b880,
        .name           = "Davicom DM9161E",
        .phy_id_mask    = 0x0ffffff0,
        .features       = PHY_BASIC_FEATURES,
        .config_init    = dm9161_config_init,
        .config_aneg    = dm9161_config_aneg,
        .read_status    = genphy_read_status,
        .driver         = { .owner = THIS_MODULE,},
};

static struct phy_driver dm9161a_driver = {
        .phy_id         = 0x0181b8a0,
        .name           = "Davicom DM9161A",
        .phy_id_mask    = 0x0ffffff0,
        .features       = PHY_BASIC_FEATURES,
        .config_init    = dm9161_config_init,
        .config_aneg    = dm9161_config_aneg,
        .read_status    = genphy_read_status,
        .driver         = { .owner = THIS_MODULE,},
};

static struct phy_driver dm9131_driver = {
        .phy_id         = 0x00181b80,
        .name           = "Davicom DM9131",
        .phy_id_mask    = 0x0ffffff0,
        .features       = PHY_BASIC_FEATURES,
        .flags          = PHY_HAS_INTERRUPT,
        .config_aneg    = genphy_config_aneg,
        .read_status    = genphy_read_status,
        .ack_interrupt  = dm9161_ack_interrupt,
        .config_intr    = dm9161_config_intr,
        .driver         = { .owner = THIS_MODULE,},
};
static int __init davicom_init(void)
{
        int ret;

        ret = phy_driver_register(&dm9161e_driver);
        if (ret)
                goto err1;

        ret = phy_driver_register(&dm9161a_driver);
        if (ret)
                goto err2;

        ret = phy_driver_register(&dm9131_driver);
        if (ret)
                goto err3;
        return 0;

 err3:
        phy_driver_unregister(&dm9161a_driver);
 err2:
        phy_driver_unregister(&dm9161e_driver);
 err1:
        return ret;
}

static void __exit davicom_exit(void)
{
        phy_driver_unregister(&dm9161e_driver);
        phy_driver_unregister(&dm9161a_driver);
        phy_driver_unregister(&dm9131_driver);
}

module_init(davicom_init);
module_exit(davicom_exit);

在Linux内核配置中，选择DAVICOM公司PHY芯片的支持。

make menuconfig

Device Drivers-->Network device Support-->PHY Device support and infrastructure-->Drivers for DAVICOM Phy

这样在Linux的初始化中，会加载DAVICOM PHY芯片驱动module_init(davicom_init)。

 

所以如果需要再添加别的DM9161系列的PHY芯片支持，做的工作还是比较简单的。

第一：建立一个struct phy_driver的结构体：

static struct phy_driver dm9161c_driver = {
        .phy_id         = 0x.................,
        .name           = "Davicom DM9161C",
        .phy_id_mask    = 0x0ffffff0,
        .features       = PHY_BASIC_FEATURES,
        .config_init    = dm9161_config_init,
        .config_aneg    = dm9161_config_aneg,
        .read_status    = genphy_read_status,
        .driver         = { .owner = THIS_MODULE,},
};

第二：static int __init davicom_init(void）函数中增加相应的注册函数 ret = phy_driver_register(&dm9161c_driver)，并添加相关的错误处理

第三：static void __exit davicom_exit(void)函数中添加卸载函数.