自定义建设网站,手工制作头饰,有赞商城官网,竞价推广外包托管文章目录 动手写驱动之前的思考MAC驱动兼容不同的MPU平台解决不同MPU平台头文件包含的问题对MAC操作接口的抽象对MAC设备的抽象MAC设备的注册 这是个人驱动开发过程中做的一些记录#xff0c;仅代表个人意见和理解#xff0c;不喜勿喷 动手写驱动之前的思考 MAC驱动需要兼容不… 文章目录 动手写驱动之前的思考MAC驱动兼容不同的MPU平台解决不同MPU平台头文件包含的问题对MAC操作接口的抽象对MAC设备的抽象MAC设备的注册 这是个人驱动开发过程中做的一些记录仅代表个人意见和理解不喜勿喷 动手写驱动之前的思考 MAC驱动需要兼容不同的MPU平台 MAC驱动需要支持不同的PHY芯片 MAC驱动需要支持多个以太网接口 MAC驱动需要是否借鉴某个平台代码 在动手写驱动之前脑海里就会在不停地思考这几个问题等脑子里有个大概的可行框架就开始动手码代码。
MAC驱动兼容不同的MPU平台 Microchip 也有着丰富的MPU产品线(通过收购Atmel而获取)覆盖传统的ARM9、Cortex-A5和Cortex-A7内核。有的MPU它的以太网叫做GMAC而有的又叫做EMAC那编写驱动的时候就要留意对GMAC和EMAC的同时
解决不同MPU平台头文件包含的问题 选择在libraries/Kconfig文件下添加以下内容
config SOC_SAM9X60_EKboolselect RT_USING_COMPONENTS_INITselect RT_USING_CACHEconfig SOC_SAM9X75_EKboolselect RT_USING_COMPONENTS_INITselect RT_USING_CACHEconfig SOC_SAMA5D2_XULTboolselect ARCH_ARM_CORTEX_Aselect ARCH_ARM_CORTEX_FPUconfig SOC_SAMA5D2_SOM1_EKboolselect ARCH_ARM_CORTEX_Aselect ARCH_ARM_CORTEX_FPUconfig SOC_SAMA7G54_EKboolselect ARCH_ARM_CORTEX_Aselect ARCH_ARM_CORTEX_FPU那在sam9x75-ek/board/Kconfig文件下这么做
menu Microchip Harmony Plib Configurationconfig SOC_SAM9X75boolselect ARCH_ARM_ARM9select SOC_SAM9X75_EKselect RT_USING_USER_MAINdefault y通过这样的方式在选择sam9x75-ek平台做开发的时候就会自动选择上SOC_SAM9X75_EK这个宏定义后面会用到这个定义。 接下来在gmac/hpl_mac_async.h头文件中添加以下代码实现了对不同平台头文件的包含
#ifdef SOC_SAMA5D2
#include sama5d27.h
#endif#ifdef SOC_SAM9X75
#include sam9x75.h
#endif#ifdef SOC_SAMA7G54
#include sama7g54.h
#endif有的MPU平台只有一个GMAC那它给的MAC相关ID定义是ID_GMAC如果包含2个GMAC的MPU平台则会给出ID_GMAC0和ID_GMAC1那我选择在hpl_mac_async.h头文件添加这样的定义后面会讲解到这样定义的作用
#define ID_GMAC_NONE 0xFF#ifdef ID_GMAC
# define MAC0_ID ID_GMAC
# define MAC1_ID ID_GMAC_NONE
# define MAC0_IRQn GMAC_IRQn
# define MAC1_IRQn ID_GMAC_NONE
# define MAC0_REGS GMAC_REGS
# define MAC1_REGS (void *)0
#else
# define MAC0_ID ID_GMAC0
# define MAC1_ID ID_GMAC1
# define MAC0_IRQn GMAC0_IRQn
# define MAC1_IRQn GMAC1_IRQn
# define MAC0_REGS GMAC0_REGS
# define MAC1_REGS GMAC1_REGS
#endif对MAC操作接口的抽象 MAC操作接口的抽象包括中断处理函数、初始化、使能和禁止、网络数据包的收发、获取接收数据包长度、过滤的设置、MAC地址的设置和非常重要的PHY读写访问接口
struct h3_macplib_ops
{void (*macdev_interrupt)(mac_dev *const dev);int32_t (*macdev_init)(mac_dev *const dev, void *const hw);int32_t (*macdev_deinit)(mac_dev *const dev);int32_t (*macdev_enable)(mac_dev *const dev);int32_t (*macdev_disable)(mac_dev *const dev);int32_t (*macdev_change) (mac_dev *const dev, uint32_t speed);int32_t (*macdev_send)(mac_dev *const dev, uint8_t *buf, uint32_t len);uint32_t (*macdev_recv)(mac_dev *const dev, uint8_t *buf, uint32_t len);uint32_t (*macdev_rxbyte)(mac_dev *const dev);int32_t (*macdev_register)(mac_dev *const dev, mac_cb_type type, mac_async_cb fn);int32_t (*macdev_filter)(mac_dev *const dev, uint8_t index, mac_filter *filter);int32_t (*macdev_setmac)(mac_dev *const dev, uint8_t mac[6]);int32_t (*macdev_writephy)(mac_dev *const dev, uint16_t addr, uint16_t reg, uint16_t data);int32_t (*macdev_readphy) (mac_dev *const dev, uint16_t addr, uint16_t reg, uint16_t *val);
};对MAC设备的抽象 对MAC设备也做出了抽象MPU中如果存在多个MAC接口那就会有对应数量的MAC设备实例
struct h3_macplib_dev
{const char *name;IRQn_Type irqnum;H3_MAC_REGS regs;uint8_t mac_addr[6];uint8_t dev_id;uint8_t reserved;mac_async_dev mac_dev;phy_async_dev phy_dev;const struct rt_mdio_bus_ops *mdio_ops;const struct h3_macplib_ops *mac_ops;struct rt_mdio_bus rt_mdiobus;struct eth_device rt_ethdev;
};MAC设备的注册 对MAC设备对应的实例其部分成员都会在h3_macplib.c文件里面做静态的初始化
#if defined(BSP_USING_GMAC0) || defined(BSP_USING_EMAC0)
struct h3_macplib_dev h3_macdev0 {.name e0,.irqnum MAC0_IRQn,.regs MAC0_REGS,.dev_id MAC0_ID,.phy_dev {.name PHY0_DEVICE_NAME,.phyID1 H3_MACPLIB_PHY0ID1,.phyID2 H3_MACPLIB_PHY0ID2,.phyaddr PHY0_DEVICE_ADDRESS,},.mac_ops h3_macdev_ops,
};
#endif#if defined(BSP_USING_GMAC1) || defined(BSP_USING_EMAC1)
struct h3_macplib_dev h3_macdev1 {.name e1,.irqnum MAC1_IRQn,.regs MAC1_REGS,.dev_id MAC1_ID,.phy_dev {.name PHY1_DEVICE_NAME,.phyID1 H3_MACPLIB_PHY1ID1,.phyID2 H3_MACPLIB_PHY1ID2,.phyaddr PHY1_DEVICE_ADDRESS,},.mac_ops h3_macdev_ops,
};
#endif实现对多个MAC设备的注册是这样来实现的
static struct h3_macplib_dev *h3_macplib_devtable[]
{0
#if defined(BSP_USING_GMAC0) || defined(BSP_USING_EMAC0), h3_macdev0
#endif
#if defined(BSP_USING_GMAC1) || defined(BSP_USING_EMAC1), h3_macdev1
#endif
};int h3_macplib_init(void)
{rt_err_t state;uint8_t macaddr 0xAA;uint32_t table_sz sizeof(h3_macplib_devtable)/sizeof(uint32_t);struct h3_macplib_dev *macplib_dev;for (uint32_t i 1; i table_sz; i){macplib_dev h3_macplib_devtable[i];macplib_dev-mac_dev.devid macplib_dev-dev_id;macplib_dev-rt_mdiobus.hw_obj (void *)macplib_dev;macplib_dev-rt_mdiobus.ops h3_mdiobus_ops;/* GMAC MAC Address */macplib_dev-mac_addr[0] 0x54;macplib_dev-mac_addr[1] 0x27;macplib_dev-mac_addr[2] 0x8d;macplib_dev-mac_addr[3] 0x33;macplib_dev-mac_addr[4] 0x55;macplib_dev-mac_addr[5] macaddr;macplib_dev-rt_ethdev.parent.init h3_macplib_initial;macplib_dev-rt_ethdev.parent.open h3_macplib_open;macplib_dev-rt_ethdev.parent.close h3_macplib_close;macplib_dev-rt_ethdev.parent.read h3_macplib_read;macplib_dev-rt_ethdev.parent.write h3_macplib_write;macplib_dev-rt_ethdev.parent.control h3_macplib_control;macplib_dev-rt_ethdev.parent.user_data (void *)macplib_dev;macplib_dev-rt_ethdev.eth_rx h3_macplib_rx;macplib_dev-rt_ethdev.eth_tx h3_macplib_tx;/* register eth device */state eth_device_init(macplib_dev-rt_ethdev, macplib_dev-name);if (RT_EOK ! state) {break;}eth_device_linkchange(macplib_dev-rt_ethdev, RT_FALSE);}return state;
}
