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path: root/drivers/net/ethernet/hisilicon/hns_mdio.c
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Diffstat (limited to 'drivers/net/ethernet/hisilicon/hns_mdio.c')
-rw-r--r--drivers/net/ethernet/hisilicon/hns_mdio.c204
1 files changed, 138 insertions, 66 deletions
diff --git a/drivers/net/ethernet/hisilicon/hns_mdio.c b/drivers/net/ethernet/hisilicon/hns_mdio.c
index 765ddb3dcd1a..33f4c483af0f 100644
--- a/drivers/net/ethernet/hisilicon/hns_mdio.c
+++ b/drivers/net/ethernet/hisilicon/hns_mdio.c
@@ -7,6 +7,7 @@
* (at your option) any later version.
*/
+#include <linux/acpi.h>
#include <linux/errno.h>
#include <linux/etherdevice.h>
#include <linux/init.h>
@@ -36,9 +37,19 @@
#define MDIO_TIMEOUT 1000000
+struct hns_mdio_sc_reg {
+ u16 mdio_clk_en;
+ u16 mdio_clk_dis;
+ u16 mdio_reset_req;
+ u16 mdio_reset_dreq;
+ u16 mdio_clk_st;
+ u16 mdio_reset_st;
+};
+
struct hns_mdio_device {
void *vbase; /* mdio reg base address */
struct regmap *subctrl_vbase;
+ struct hns_mdio_sc_reg sc_reg;
};
/* mdio reg */
@@ -92,7 +103,6 @@ enum mdio_c45_op_seq {
#define MDIO_SC_CLK_DIS 0x33C
#define MDIO_SC_RESET_REQ 0xA38
#define MDIO_SC_RESET_DREQ 0xA3C
-#define MDIO_SC_CTRL 0x2010
#define MDIO_SC_CLK_ST 0x531C
#define MDIO_SC_RESET_ST 0x5A1C
@@ -352,69 +362,68 @@ static int hns_mdio_read(struct mii_bus *bus, int phy_id, int regnum)
static int hns_mdio_reset(struct mii_bus *bus)
{
struct hns_mdio_device *mdio_dev = (struct hns_mdio_device *)bus->priv;
+ const struct hns_mdio_sc_reg *sc_reg;
int ret;
- if (!mdio_dev->subctrl_vbase) {
- dev_err(&bus->dev, "mdio sys ctl reg has not maped\n");
- return -ENODEV;
- }
-
- /*1. reset req, and read reset st check*/
- ret = mdio_sc_cfg_reg_write(mdio_dev, MDIO_SC_RESET_REQ, 0x1,
- MDIO_SC_RESET_ST, 0x1,
- MDIO_CHECK_SET_ST);
- if (ret) {
- dev_err(&bus->dev, "MDIO reset fail\n");
- return ret;
- }
+ if (dev_of_node(bus->parent)) {
+ if (!mdio_dev->subctrl_vbase) {
+ dev_err(&bus->dev, "mdio sys ctl reg has not maped\n");
+ return -ENODEV;
+ }
- /*2. dis clk, and read clk st check*/
- ret = mdio_sc_cfg_reg_write(mdio_dev, MDIO_SC_CLK_DIS,
- 0x1, MDIO_SC_CLK_ST, 0x1,
- MDIO_CHECK_CLR_ST);
- if (ret) {
- dev_err(&bus->dev, "MDIO dis clk fail\n");
- return ret;
- }
+ sc_reg = &mdio_dev->sc_reg;
+ /* 1. reset req, and read reset st check */
+ ret = mdio_sc_cfg_reg_write(mdio_dev, sc_reg->mdio_reset_req,
+ 0x1, sc_reg->mdio_reset_st, 0x1,
+ MDIO_CHECK_SET_ST);
+ if (ret) {
+ dev_err(&bus->dev, "MDIO reset fail\n");
+ return ret;
+ }
- /*3. reset dreq, and read reset st check*/
- ret = mdio_sc_cfg_reg_write(mdio_dev, MDIO_SC_RESET_DREQ, 0x1,
- MDIO_SC_RESET_ST, 0x1,
- MDIO_CHECK_CLR_ST);
- if (ret) {
- dev_err(&bus->dev, "MDIO dis clk fail\n");
- return ret;
- }
+ /* 2. dis clk, and read clk st check */
+ ret = mdio_sc_cfg_reg_write(mdio_dev, sc_reg->mdio_clk_dis,
+ 0x1, sc_reg->mdio_clk_st, 0x1,
+ MDIO_CHECK_CLR_ST);
+ if (ret) {
+ dev_err(&bus->dev, "MDIO dis clk fail\n");
+ return ret;
+ }
- /*4. en clk, and read clk st check*/
- ret = mdio_sc_cfg_reg_write(mdio_dev, MDIO_SC_CLK_EN,
- 0x1, MDIO_SC_CLK_ST, 0x1,
- MDIO_CHECK_SET_ST);
- if (ret)
- dev_err(&bus->dev, "MDIO en clk fail\n");
+ /* 3. reset dreq, and read reset st check */
+ ret = mdio_sc_cfg_reg_write(mdio_dev, sc_reg->mdio_reset_dreq,
+ 0x1, sc_reg->mdio_reset_st, 0x1,
+ MDIO_CHECK_CLR_ST);
+ if (ret) {
+ dev_err(&bus->dev, "MDIO dis clk fail\n");
+ return ret;
+ }
+ /* 4. en clk, and read clk st check */
+ ret = mdio_sc_cfg_reg_write(mdio_dev, sc_reg->mdio_clk_en,
+ 0x1, sc_reg->mdio_clk_st, 0x1,
+ MDIO_CHECK_SET_ST);
+ if (ret)
+ dev_err(&bus->dev, "MDIO en clk fail\n");
+ } else if (is_acpi_node(bus->parent->fwnode)) {
+ acpi_status s;
+
+ s = acpi_evaluate_object(ACPI_HANDLE(bus->parent),
+ "_RST", NULL, NULL);
+ if (ACPI_FAILURE(s)) {
+ dev_err(&bus->dev, "Reset failed, return:%#x\n", s);
+ ret = -EBUSY;
+ } else {
+ ret = 0;
+ }
+ } else {
+ dev_err(&bus->dev, "Can not get cfg data from DT or ACPI\n");
+ ret = -ENXIO;
+ }
return ret;
}
/**
- * hns_mdio_bus_name - get mdio bus name
- * @name: mdio bus name
- * @np: mdio device node pointer
- */
-static void hns_mdio_bus_name(char *name, struct device_node *np)
-{
- const u32 *addr;
- u64 taddr = OF_BAD_ADDR;
-
- addr = of_get_address(np, 0, NULL, NULL);
- if (addr)
- taddr = of_translate_address(np, addr);
-
- snprintf(name, MII_BUS_ID_SIZE, "%s@%llx", np->name,
- (unsigned long long)taddr);
-}
-
-/**
* hns_mdio_probe - probe mdio device
* @pdev: mdio platform device
*
@@ -422,17 +431,16 @@ static void hns_mdio_bus_name(char *name, struct device_node *np)
*/
static int hns_mdio_probe(struct platform_device *pdev)
{
- struct device_node *np;
struct hns_mdio_device *mdio_dev;
struct mii_bus *new_bus;
struct resource *res;
- int ret;
+ int ret = -ENODEV;
if (!pdev) {
dev_err(NULL, "pdev is NULL!\r\n");
return -ENODEV;
}
- np = pdev->dev.of_node;
+
mdio_dev = devm_kzalloc(&pdev->dev, sizeof(*mdio_dev), GFP_KERNEL);
if (!mdio_dev)
return -ENOMEM;
@@ -448,7 +456,7 @@ static int hns_mdio_probe(struct platform_device *pdev)
new_bus->write = hns_mdio_write;
new_bus->reset = hns_mdio_reset;
new_bus->priv = mdio_dev;
- hns_mdio_bus_name(new_bus->id, np);
+ new_bus->parent = &pdev->dev;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
mdio_dev->vbase = devm_ioremap_resource(&pdev->dev, res);
@@ -457,16 +465,73 @@ static int hns_mdio_probe(struct platform_device *pdev)
return ret;
}
- mdio_dev->subctrl_vbase =
- syscon_node_to_regmap(of_parse_phandle(np, "subctrl-vbase", 0));
- if (IS_ERR(mdio_dev->subctrl_vbase)) {
- dev_warn(&pdev->dev, "no syscon hisilicon,peri-c-subctrl\n");
- mdio_dev->subctrl_vbase = NULL;
- }
- new_bus->parent = &pdev->dev;
platform_set_drvdata(pdev, new_bus);
+ snprintf(new_bus->id, MII_BUS_ID_SIZE, "%s-%s", "Mii",
+ dev_name(&pdev->dev));
+ if (dev_of_node(&pdev->dev)) {
+ struct of_phandle_args reg_args;
+
+ ret = of_parse_phandle_with_fixed_args(pdev->dev.of_node,
+ "subctrl-vbase",
+ 4,
+ 0,
+ &reg_args);
+ if (!ret) {
+ mdio_dev->subctrl_vbase =
+ syscon_node_to_regmap(reg_args.np);
+ if (IS_ERR(mdio_dev->subctrl_vbase)) {
+ dev_warn(&pdev->dev, "syscon_node_to_regmap error\n");
+ mdio_dev->subctrl_vbase = NULL;
+ } else {
+ if (reg_args.args_count == 4) {
+ mdio_dev->sc_reg.mdio_clk_en =
+ (u16)reg_args.args[0];
+ mdio_dev->sc_reg.mdio_clk_dis =
+ (u16)reg_args.args[0] + 4;
+ mdio_dev->sc_reg.mdio_reset_req =
+ (u16)reg_args.args[1];
+ mdio_dev->sc_reg.mdio_reset_dreq =
+ (u16)reg_args.args[1] + 4;
+ mdio_dev->sc_reg.mdio_clk_st =
+ (u16)reg_args.args[2];
+ mdio_dev->sc_reg.mdio_reset_st =
+ (u16)reg_args.args[3];
+ } else {
+ /* for compatible */
+ mdio_dev->sc_reg.mdio_clk_en =
+ MDIO_SC_CLK_EN;
+ mdio_dev->sc_reg.mdio_clk_dis =
+ MDIO_SC_CLK_DIS;
+ mdio_dev->sc_reg.mdio_reset_req =
+ MDIO_SC_RESET_REQ;
+ mdio_dev->sc_reg.mdio_reset_dreq =
+ MDIO_SC_RESET_DREQ;
+ mdio_dev->sc_reg.mdio_clk_st =
+ MDIO_SC_CLK_ST;
+ mdio_dev->sc_reg.mdio_reset_st =
+ MDIO_SC_RESET_ST;
+ }
+ }
+ } else {
+ dev_warn(&pdev->dev, "find syscon ret = %#x\n", ret);
+ mdio_dev->subctrl_vbase = NULL;
+ }
+
+ ret = of_mdiobus_register(new_bus, pdev->dev.of_node);
+ } else if (is_acpi_node(pdev->dev.fwnode)) {
+ /* Clear all the IRQ properties */
+ memset(new_bus->irq, PHY_POLL, 4 * PHY_MAX_ADDR);
+
+ /* Mask out all PHYs from auto probing. */
+ new_bus->phy_mask = ~0;
+
+ /* Register the MDIO bus */
+ ret = mdiobus_register(new_bus);
+ } else {
+ dev_err(&pdev->dev, "Can not get cfg data from DT or ACPI\n");
+ ret = -ENXIO;
+ }
- ret = of_mdiobus_register(new_bus, np);
if (ret) {
dev_err(&pdev->dev, "Cannot register as MDIO bus!\n");
platform_set_drvdata(pdev, NULL);
@@ -499,12 +564,19 @@ static const struct of_device_id hns_mdio_match[] = {
{}
};
+static const struct acpi_device_id hns_mdio_acpi_match[] = {
+ { "HISI0141", 0 },
+ { },
+};
+MODULE_DEVICE_TABLE(acpi, hns_mdio_acpi_match);
+
static struct platform_driver hns_mdio_driver = {
.probe = hns_mdio_probe,
.remove = hns_mdio_remove,
.driver = {
.name = MDIO_DRV_NAME,
.of_match_table = hns_mdio_match,
+ .acpi_match_table = ACPI_PTR(hns_mdio_acpi_match),
},
};
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-02 14:38:11 +0000