hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

net: hns: register phy device in each mac initial sequence 

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@huawei.com>
Signed-off-by: Yisen Zhuang <Yisen.Zhuang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Kejian Yan 2016-06-03 10:55:19 +08:00 committed by David S. Miller
parent 8413b3be4d
commit 1d1afa2ebf
1 changed files with 126 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

133
drivers/net/ethernet/hisilicon/hns/hns_dsaf_mac.c
View File

@ -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;