- phy-handle: see ethernet.txt [1].
- mac-address: see ethernet.txt [1].
- clocks: clock phandle and specifier pair.
+- clock-names: contain the clock name "mac_core"(required) and "mac_ifc"(optional).
+- resets: should contain the phandle to the MAC core reset signal(optional),
+ the MAC interface reset signal(optional)
+ and the PHY reset signal(optional).
+- reset-names: contain the reset signal name "mac_core"(optional),
+ "mac_ifc"(optional) and "phy"(optional).
+- hisilicon,phy-reset-delays-us: triplet of delays if PHY reset signal given.
+ The 1st cell is reset pre-delay in micro seconds.
+ The 2nd cell is reset pulse in micro seconds.
+ The 3rd cell is reset post-delay in micro seconds.
- PHY subnode: inherits from phy binding [2]
Example:
gmac0: ethernet@f9840000 {
- compatible = "hisilicon,hix5hd2-gemac", "hisilicon,hisi-gemac-v1";
+ compatible = "hisilicon,hi3798cv200-gemac", "hisilicon,hisi-gemac-v2";
reg = <0xf9840000 0x1000>,<0xf984300c 0x4>;
interrupts = <0 71 4>;
#address-cells = <1>;
#size-cells = <0>;
- phy-mode = "mii";
+ phy-mode = "rgmii";
phy-handle = <&phy2>;
mac-address = [00 00 00 00 00 00];
- clocks = <&clock HIX5HD2_MAC0_CLK>;
+ clocks = <&crg HISTB_ETH0_MAC_CLK>, <&crg HISTB_ETH0_MACIF_CLK>;
+ clock-names = "mac_core", "mac_ifc";
+ resets = <&crg 0xcc 8>, <&crg 0xcc 10>, <&crg 0xcc 12>;
+ reset-names = "mac_core", "mac_ifc", "phy";
+ hisilicon,phy-reset-delays-us = <10000 10000 30000>;
phy2: ethernet-phy@2 {
reg = <2>;
#include <linux/of_device.h>
#include <linux/of_net.h>
#include <linux/of_mdio.h>
+#include <linux/reset.h>
#include <linux/clk.h>
#include <linux/circ_buf.h>
#define GEMAC_V2 (GEMAC_V1 | HW_CAP_TSO)
#define HAS_CAP_TSO(hw_cap) ((hw_cap) & HW_CAP_TSO)
+#define PHY_RESET_DELAYS_PROPERTY "hisilicon,phy-reset-delays-us"
+
+enum phy_reset_delays {
+ PRE_DELAY,
+ PULSE,
+ POST_DELAY,
+ DELAYS_NUM,
+};
+
struct hix5hd2_desc {
__le32 buff_addr;
__le32 cmd;
unsigned int speed;
unsigned int duplex;
- struct clk *clk;
+ struct clk *mac_core_clk;
+ struct clk *mac_ifc_clk;
+ struct reset_control *mac_core_rst;
+ struct reset_control *mac_ifc_rst;
+ struct reset_control *phy_rst;
+ u32 phy_reset_delays[DELAYS_NUM];
struct mii_bus *bus;
struct napi_struct napi;
struct work_struct tx_timeout_task;
};
+static inline void hix5hd2_mac_interface_reset(struct hix5hd2_priv *priv)
+{
+ if (!priv->mac_ifc_rst)
+ return;
+
+ reset_control_assert(priv->mac_ifc_rst);
+ reset_control_deassert(priv->mac_ifc_rst);
+}
+
static void hix5hd2_config_port(struct net_device *dev, u32 speed, u32 duplex)
{
struct hix5hd2_priv *priv = netdev_priv(dev);
if (duplex)
val |= GMAC_FULL_DUPLEX;
writel_relaxed(val, priv->ctrl_base);
+ hix5hd2_mac_interface_reset(priv);
writel_relaxed(BIT_MODE_CHANGE_EN, priv->base + MODE_CHANGE_EN);
if (speed == SPEED_1000)
struct phy_device *phy;
int ret;
- ret = clk_prepare_enable(priv->clk);
+ ret = clk_prepare_enable(priv->mac_core_clk);
+ if (ret < 0) {
+ netdev_err(dev, "failed to enable mac core clk %d\n", ret);
+ return ret;
+ }
+
+ ret = clk_prepare_enable(priv->mac_ifc_clk);
if (ret < 0) {
- netdev_err(dev, "failed to enable clk %d\n", ret);
+ clk_disable_unprepare(priv->mac_core_clk);
+ netdev_err(dev, "failed to enable mac ifc clk %d\n", ret);
return ret;
}
phy = of_phy_connect(dev, priv->phy_node,
&hix5hd2_adjust_link, 0, priv->phy_mode);
- if (!phy)
+ if (!phy) {
+ clk_disable_unprepare(priv->mac_ifc_clk);
+ clk_disable_unprepare(priv->mac_core_clk);
return -ENODEV;
+ }
phy_start(phy);
hix5hd2_hw_init(priv);
phy_disconnect(dev->phydev);
}
- clk_disable_unprepare(priv->clk);
+ clk_disable_unprepare(priv->mac_ifc_clk);
+ clk_disable_unprepare(priv->mac_core_clk);
return 0;
}
}
}
+static inline void hix5hd2_mac_core_reset(struct hix5hd2_priv *priv)
+{
+ if (!priv->mac_core_rst)
+ return;
+
+ reset_control_assert(priv->mac_core_rst);
+ reset_control_deassert(priv->mac_core_rst);
+}
+
+static void hix5hd2_sleep_us(u32 time_us)
+{
+ u32 time_ms;
+
+ if (!time_us)
+ return;
+
+ time_ms = DIV_ROUND_UP(time_us, 1000);
+ if (time_ms < 20)
+ usleep_range(time_us, time_us + 500);
+ else
+ msleep(time_ms);
+}
+
+static void hix5hd2_phy_reset(struct hix5hd2_priv *priv)
+{
+ /* To make sure PHY hardware reset success,
+ * we must keep PHY in deassert state first and
+ * then complete the hardware reset operation
+ */
+ reset_control_deassert(priv->phy_rst);
+ hix5hd2_sleep_us(priv->phy_reset_delays[PRE_DELAY]);
+
+ reset_control_assert(priv->phy_rst);
+ /* delay some time to ensure reset ok,
+ * this depends on PHY hardware feature
+ */
+ hix5hd2_sleep_us(priv->phy_reset_delays[PULSE]);
+ reset_control_deassert(priv->phy_rst);
+ /* delay some time to ensure later MDIO access */
+ hix5hd2_sleep_us(priv->phy_reset_delays[POST_DELAY]);
+}
+
static const struct of_device_id hix5hd2_of_match[];
static int hix5hd2_dev_probe(struct platform_device *pdev)
goto out_free_netdev;
}
- priv->clk = devm_clk_get(&pdev->dev, NULL);
- if (IS_ERR(priv->clk)) {
- netdev_err(ndev, "failed to get clk\n");
+ priv->mac_core_clk = devm_clk_get(&pdev->dev, "mac_core");
+ if (IS_ERR(priv->mac_core_clk)) {
+ netdev_err(ndev, "failed to get mac core clk\n");
ret = -ENODEV;
goto out_free_netdev;
}
- ret = clk_prepare_enable(priv->clk);
+ ret = clk_prepare_enable(priv->mac_core_clk);
if (ret < 0) {
- netdev_err(ndev, "failed to enable clk %d\n", ret);
+ netdev_err(ndev, "failed to enable mac core clk %d\n", ret);
goto out_free_netdev;
}
+ priv->mac_ifc_clk = devm_clk_get(&pdev->dev, "mac_ifc");
+ if (IS_ERR(priv->mac_ifc_clk))
+ priv->mac_ifc_clk = NULL;
+
+ ret = clk_prepare_enable(priv->mac_ifc_clk);
+ if (ret < 0) {
+ netdev_err(ndev, "failed to enable mac ifc clk %d\n", ret);
+ goto out_disable_mac_core_clk;
+ }
+
+ priv->mac_core_rst = devm_reset_control_get(dev, "mac_core");
+ if (IS_ERR(priv->mac_core_rst))
+ priv->mac_core_rst = NULL;
+ hix5hd2_mac_core_reset(priv);
+
+ priv->mac_ifc_rst = devm_reset_control_get(dev, "mac_ifc");
+ if (IS_ERR(priv->mac_ifc_rst))
+ priv->mac_ifc_rst = NULL;
+
+ priv->phy_rst = devm_reset_control_get(dev, "phy");
+ if (IS_ERR(priv->phy_rst)) {
+ priv->phy_rst = NULL;
+ } else {
+ ret = of_property_read_u32_array(node,
+ PHY_RESET_DELAYS_PROPERTY,
+ priv->phy_reset_delays,
+ DELAYS_NUM);
+ if (ret)
+ goto out_disable_clk;
+ hix5hd2_phy_reset(priv);
+ }
+
bus = mdiobus_alloc();
if (bus == NULL) {
ret = -ENOMEM;
- goto out_free_netdev;
+ goto out_disable_clk;
}
bus->priv = priv;
goto out_destroy_queue;
}
- clk_disable_unprepare(priv->clk);
+ clk_disable_unprepare(priv->mac_ifc_clk);
+ clk_disable_unprepare(priv->mac_core_clk);
return ret;
mdiobus_unregister(bus);
err_free_mdio:
mdiobus_free(bus);
+out_disable_clk:
+ clk_disable_unprepare(priv->mac_ifc_clk);
+out_disable_mac_core_clk:
+ clk_disable_unprepare(priv->mac_core_clk);
out_free_netdev:
free_netdev(ndev);
projects / linux-beck.git / commitdiff