In ACPI case, there is no interface to register phy device to mdio-bus.
Phy device has to be registered itself to mdio-bus, and then enet can
get the phy device's info so that it can config the phy-device to help
to trasmit and receive data.
HNS hardware topology is as below. The MDIO controller may control several
PHY-devices, and each PHY-device connects to a MAC device. PHY-devices
will register when each mac find PHY device in initial sequence.
cpu
|
|
-------------------------------------------
| | |
| | |
| dsaf |
MDIO | MDIO
| --------------------------- |
| | | | | |
| | | | | |
| MAC MAC MAC MAC |
| | | | | |
---- |-------- |-------- | | --------
|| || || ||
PHY PHY PHY PHY
Signed-off-by: Kejian Yan <yankejian@xxxxxxxxxx>
Signed-off-by: Yisen Zhuang <Yisen.Zhuang@xxxxxxxxxx>
---
change log:
v2: fix the build error by kbuild test robot
v1: first submit
link: https://lkml.org/lkml/2016/5/13/97
---
drivers/net/ethernet/hisilicon/hns/hns_dsaf_mac.c | 133 ++++++++++++++++++++--
1 file changed, 126 insertions(+), 7 deletions(-)
diff --git a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_mac.c b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_mac.c
index 3ef0c9b..c526558 100644
--- a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_mac.c
+++ b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_mac.c
@@ -7,6 +7,7 @@
* (at your option) any later version.
*/
+#include <linux/acpi.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
@@ -638,6 +639,115 @@ free_mac_drv:
return ret;
}
+static int
+hns_mac_phy_parse_addr(struct device *dev, struct fwnode_handle *fwnode)
+{
+ u32 addr;
+ int ret;
+
+ ret = fwnode_property_read_u32(fwnode, "phy-addr", &addr);
+ if (ret) {
+ dev_err(dev, "has invalid PHY address ret:%d\n", ret);
+ return ret;
+ }
+
+ if (addr >= PHY_MAX_ADDR) {
+ dev_err(dev, "PHY address %i is too large\n", addr);
+ return -EINVAL;
+ }
+
+ return addr;
+}
+
+static int hns_mac_phydev_match(struct device *dev, void *fwnode)
+{
+ return dev->fwnode == fwnode;
+}
+
+static struct
+platform_device *hns_mac_find_platform_device(struct fwnode_handle *fwnode)
+{
+ struct device *dev;
+
+ dev = bus_find_device(&platform_bus_type, NULL,
+ fwnode, hns_mac_phydev_match);
+ return dev ? to_platform_device(dev) : NULL;
+}
+
+static int
+hns_mac_register_phydev(struct mii_bus *mdio, struct hns_mac_cb *mac_cb,
+ u32 addr)
+{
+ struct phy_device *phy;
+ const char *phy_type;
+ bool is_c45;
+ int rc;
+
+ rc = fwnode_property_read_string(mac_cb->fw_port,
+ "phy-mode", &phy_type);
+ if (rc < 0)
+ return rc;
+
+ if (!strcmp(phy_type, phy_modes(PHY_INTERFACE_MODE_XGMII)))
+ is_c45 = 1;
+ else if (!strcmp(phy_type, phy_modes(PHY_INTERFACE_MODE_SGMII)))
+ is_c45 = 0;
+ else
+ return -ENODATA;
+
+ phy = get_phy_device(mdio, addr, is_c45);
+ if (!phy || IS_ERR(phy))
+ return -EIO;
+
+ if (mdio->irq)
+ phy->irq = mdio->irq[addr];
+
+ /* All data is now stored in the phy struct;
+ * register it
+ */
+ rc = phy_device_register(phy);
+ if (rc) {
+ phy_device_free(phy);
+ return -ENODEV;
+ }
+
+ mac_cb->phy_dev = phy;
+
+ dev_dbg(&mdio->dev, "registered phy at address %i\n", addr);
+
+ return 0;
+}
+
+static void hns_mac_register_phy(struct hns_mac_cb *mac_cb)
+{
+ struct acpi_reference_args args;
+ struct platform_device *pdev;
+ struct mii_bus *mii_bus;
+ int rc;
+ int addr;
+
+ /* Loop over the child nodes and register a phy_device for each one */
+ if (!to_acpi_device_node(mac_cb->fw_port))
+ return;
+
+ rc = acpi_node_get_property_reference(
+ mac_cb->fw_port, "mdio-node", 0, &args);
+ if (rc)
+ return;
+
+ addr = hns_mac_phy_parse_addr(mac_cb->dev, mac_cb->fw_port);
+ if (addr < 0)
+ return;
+
+ /* dev address in adev */
+ pdev = hns_mac_find_platform_device(acpi_fwnode_handle(args.adev));
+ mii_bus = platform_get_drvdata(pdev);
+ rc = hns_mac_register_phydev(mii_bus, mac_cb, addr);
+ if (!rc)
+ dev_dbg(mac_cb->dev, "mac%d register phy addr:%d\n",
+ mac_cb->mac_id, addr);
+}
+
/**
*hns_mac_get_info - get mac information from device node
*@mac_cb: mac device
@@ -690,13 +800,17 @@ static int hns_mac_get_info(struct hns_mac_cb *mac_cb)
}
if (is_of_node(mac_cb->fw_port)) {
- /* parse property from port subnode in dsaf */
- np = of_parse_phandle(to_of_node(mac_cb->fw_port), "phy-handle", 0);
- mac_cb->phy_dev = of_phy_find_device(np);
- if (mac_cb->phy_dev) {
- put_device(&mac_cb->phy_dev->mdio.dev);
- dev_dbg(mac_cb->dev, "mac%d phy_node: %s\n",
- mac_cb->mac_id, np->name);
+ /* parse property from port subnode in dsaf */
+ np = of_parse_phandle(to_of_node(mac_cb->fw_port),
+ "phy-handle", 0);
+ mac_cb->phy_dev = of_phy_find_device(np);
+ if (mac_cb->phy_dev) {
+ /* refcount is held by of_phy_find_device()
+ * if the phy_dev is found
+ */
+ put_device(&mac_cb->phy_dev->mdio.dev);
+ dev_dbg(mac_cb->dev, "mac%d phy_node: %s\n",
+ mac_cb->mac_id, np->name);
}
syscon = syscon_node_to_regmap(
@@ -743,6 +857,11 @@ static int hns_mac_get_info(struct hns_mac_cb *mac_cb)
mac_cb->cpld_ctrl_reg = cpld_args.args[0];
}
}
+ } else if (is_acpi_node(mac_cb->fw_port)) {
+ hns_mac_register_phy(mac_cb);
+ } else {
+ dev_err(mac_cb->dev, "mac%d cannot find phy node\n",
+ mac_cb->mac_id);
}
return 0;
--
1.9.1
--
To unsubscribe from this list: send the line "unsubscribe linux-acpi" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
