初始化信息
phy正常连接
log信息
[ 1.279600] rk_gmac-dwmac fe300000.ethernet: clock input or output? (input).
[ 1.280239] rk_gmac-dwmac fe300000.ethernet: TX delay(0x28).
[ 1.280746] rk_gmac-dwmac fe300000.ethernet: RX delay(0x11).
[ 1.281275] rk_gmac-dwmac fe300000.ethernet: integrated PHY? (no).
[ 1.281991] rk_gmac-dwmac fe300000.ethernet: cannot get clock clk_mac_speed
[ 1.282620] rk_gmac-dwmac fe300000.ethernet: clock input from PHY
[ 1.288166] rk_gmac-dwmac fe300000.ethernet: init for RGMII
[ 1.288783] stmmac - user ID: 0x10, Synopsys ID: 0x35
[ 1.289240] Ring mode enabled
[ 1.289512] DMA HW capability register supported
[ 1.289911] Normal descriptors
[ 1.290220] RX Checksum Offload Engine supported (type 2)
[ 1.290717] TX Checksum insertion supported
[ 1.291093] Wake-Up On Lan supported
[ 1.291463] Enable RX Mitigation via HW Watchdog Timer
[ 1.356532] libphy: stmmac: probed
[ 1.356845] eth%d: PHY ID 001cc915 at 0 IRQ POLL (stmmac-0:00) active
[ 1.357428] eth%d: PHY ID 001cc915 at 1 IRQ POLL (stmmac-0:01)
sysfs接口信息
[root@rk3399:/]# cat /sys/devices/platform/fe300000.ethernet/mdio_bus/stmmac-0/
device/ stmmac-0:00/ subsystem/
power/ stmmac-0:01/ uevent
[root@rk3399:/]# cat /sys/devices/platform/fe300000.ethernet/mdio_bus/stmmac-0/s
tmmac-0:00/phy_id
0x001cc915
[root@rk3399:/]# cat /sys/devices/platform/fe300000.ethernet/mdio_bus/stmmac-0/s
tmmac-0:00/phy_registers 0: 0x11401: 0x796d2: 0x1c3: 0xc9154: 0x1e15: 0xc1e16: 0xd7: 0x20018: 0x60019: 0x300
10: 0x3800
11: 0x0
12: 0x0
13: 0x0
14: 0x0
15: 0x3000
16: 0x16e
17: 0xad42
18: 0x9f01
19: 0x6c52
20: 0x8040
21: 0x1006
22: 0x4100
23: 0x2100
24: 0x0
25: 0x8c00
26: 0x40
27: 0x106
28: 0x217c
29: 0x8038
30: 0x123
31: 0x0
去掉phy芯片
log信息
[ 1.286877] rk_gmac-dwmac fe300000.ethernet: clock input or output? (input).
[ 1.287517] rk_gmac-dwmac fe300000.ethernet: TX delay(0x28).
[ 1.288023] rk_gmac-dwmac fe300000.ethernet: RX delay(0x11).
[ 1.288552] rk_gmac-dwmac fe300000.ethernet: integrated PHY? (no).
[ 1.289270] rk_gmac-dwmac fe300000.ethernet: cannot get clock clk_mac_speed
[ 1.289899] rk_gmac-dwmac fe300000.ethernet: clock input from PHY
[ 1.295453] rk_gmac-dwmac fe300000.ethernet: init for RGMII
[ 1.296059] stmmac - user ID: 0x10, Synopsys ID: 0x35
[ 1.296515] Ring mode enabled
[ 1.296788] DMA HW capability register supported
[ 1.297186] Normal descriptors
[ 1.297503] RX Checksum Offload Engine supported (type 2)
[ 1.297992] TX Checksum insertion supported
[ 1.298376] Wake-Up On Lan supported
[ 1.298736] Enable RX Mitigation via HW Watchdog Timer
[ 1.364025] libphy: stmmac: probed
[ 1.364343] eth%d: No PHY found
驱动识别过程
驱动文件
kernel/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c
kernel/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
kernel/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
kernel/drivers/net/phy/phy_device.c
kernel/drivers/net/phy/mdio_bus.c
kernel/include/linux/phy.h
kernel/drivers/net/ethernet/stmicro/stmmac/stmmac.h
kernel/include/linux/netdevice.h
#define PHY_MAX_ADDR 32
#define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
#define mdiobus_register(bus) __mdiobus_register(bus, THIS_MODULE)
stmmac_mdio_register(struct net_device *ndev) //注册mdio总线，配置总线参数，配置phydev中断属性mdiobus_register(new_bus); //注册mii_bus，在总线上扫描PHY_ADDR 0到31是否有对应的phydevmdiobus_scan(bus, i); //按照传递的addr数值，获取总线上是否有p对应的phydev，如果有使用phy_device_register函数进行注册get_phy_device(bus, addr, false);get_phy_id(bus, addr, &phy_id, is_c45, &c45_ids); //按照传递的addr数值读取对应addr上phy设备的id，如果有对应的设备会返回phy设备的id，否则返回0xffffffffphy_device_create(bus, addr, phy_id, is_c45, &c45_ids);phy_device_register(phydev);/*** stmmac_mdio_register* @ndev: net device structure* Description: it registers the MII bus*/
int stmmac_mdio_register(struct net_device *ndev)
{
int err = 0;struct mii_bus *new_bus;int *irqlist;struct stmmac_priv *priv = netdev_priv(ndev);struct stmmac_mdio_bus_data *mdio_bus_data = priv->plat->mdio_bus_data;int addr, found;if (!mdio_bus_data)return 0;new_bus = mdiobus_alloc();if (new_bus == NULL)return -ENOMEM;if (mdio_bus_data->irqs) {
irqlist = mdio_bus_data->irqs;} else {
for (addr = 0; addr < PHY_MAX_ADDR; addr++)priv->mii_irq[addr] = PHY_POLL;irqlist = priv->mii_irq;}#ifdef CONFIG_OFif (priv->device->of_node)mdio_bus_data->reset_gpio = -1;
#endifnew_bus->name = "stmmac";new_bus->read = &stmmac_mdio_read;new_bus->write = &stmmac_mdio_write;new_bus->reset = &stmmac_mdio_reset;snprintf(new_bus->id, MII_BUS_ID_SIZE, "%s-%x",new_bus->name, priv->plat->bus_id);new_bus->priv = ndev;new_bus->irq = irqlist;new_bus->phy_mask = mdio_bus_data->phy_mask;new_bus->parent = priv->device;err = mdiobus_register(new_bus);if (err != 0) {
pr_err("%s: Cannot register as MDIO bus\n", new_bus->name);goto bus_register_fail;}found = 0;for (addr = 0; addr < PHY_MAX_ADDR; addr++) {
struct phy_device *phydev = new_bus->phy_map[addr];if (phydev) {
int act = 0;char irq_num[4];char *irq_str;/** If an IRQ was provided to be assigned after* the bus probe, do it here.*/if ((mdio_bus_data->irqs == NULL) &&(mdio_bus_data->probed_phy_irq > 0)) {
irqlist[addr] = mdio_bus_data->probed_phy_irq;phydev->irq = mdio_bus_data->probed_phy_irq;}/** If we're going to bind the MAC to this PHY bus,* and no PHY number was provided to the MAC,* use the one probed here.*/if (priv->plat->phy_addr == -1)priv->plat->phy_addr = addr;act = (priv->plat->phy_addr == addr);switch (phydev->irq) {
case PHY_POLL:irq_str = "POLL";break;case PHY_IGNORE_INTERRUPT:irq_str = "IGNORE";break;default:sprintf(irq_num, "%d", phydev->irq);irq_str = irq_num;break;}pr_info("%s: PHY ID %08x at %d IRQ %s (%s)%s\n",ndev->name, phydev->phy_id, addr,irq_str, dev_name(&phydev->dev),act ? " active" : "");found = 1;}}if (!found) {
pr_warn("%s: No PHY found\n", ndev->name);mdiobus_unregister(new_bus);mdiobus_free(new_bus);return -ENODEV;}priv->mii = new_bus;return 0;bus_register_fail:mdiobus_free(new_bus);return err;
}
/*** __mdiobus_register - bring up all the PHYs on a given bus and attach them to bus* @bus: target mii_bus* @owner: module containing bus accessor functions** Description: Called by a bus driver to bring up all the PHYs* on a given bus, and attach them to the bus. Drivers should use* mdiobus_register() rather than __mdiobus_register() unless they* need to pass a specific owner module.** Returns 0 on success or < 0 on error.*/int __mdiobus_register(struct mii_bus *bus, struct module *owner)struct phy_device *mdiobus_scan(struct mii_bus *bus, int addr)/*** get_phy_device - reads the specified PHY device and returns its @phy_device* struct* @bus: the target MII bus* @addr: PHY address on the MII bus* @is_c45: If true the PHY uses the 802.3 clause 45 protocol** Description: Reads the ID registers of the PHY at @addr on the* @bus, then allocates and returns the phy_device to represent it.*/
struct phy_device *get_phy_device(struct mii_bus *bus, int addr, bool is_c45)/*** phy_device_register - Register the phy device on the MDIO bus* @phydev: phy_device structure to be added to the MDIO bus*/
int phy_device_register(struct phy_device *phydev)struct phy_device *phy_device_create(struct mii_bus *bus, int addr, int phy_id,bool is_c45,struct phy_c45_device_ids *c45_ids)