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-rw-r--r--drivers/net/mdio/fwnode_mdio.c58
-rw-r--r--drivers/net/mdio/mdio-i2c.c310
-rw-r--r--drivers/net/mdio/mdio-mscc-miim.c42
-rw-r--r--drivers/net/mdio/mdio-mux-meson-g12a.c20
-rw-r--r--drivers/net/mdio/mdio-mux-mmioreg.c9
-rw-r--r--drivers/net/mdio/mdio-mux-multiplexer.c9
-rw-r--r--drivers/net/mdio/of_mdio.c1
7 files changed, 378 insertions, 71 deletions
diff --git a/drivers/net/mdio/fwnode_mdio.c b/drivers/net/mdio/fwnode_mdio.c
index 1c1584fca632..689e728345ce 100644
--- a/drivers/net/mdio/fwnode_mdio.c
+++ b/drivers/net/mdio/fwnode_mdio.c
@@ -10,10 +10,31 @@
#include <linux/fwnode_mdio.h>
#include <linux/of.h>
#include <linux/phy.h>
+#include <linux/pse-pd/pse.h>
MODULE_AUTHOR("Calvin Johnson <calvin.johnson@oss.nxp.com>");
MODULE_LICENSE("GPL");
+static struct pse_control *
+fwnode_find_pse_control(struct fwnode_handle *fwnode)
+{
+ struct pse_control *psec;
+ struct device_node *np;
+
+ if (!IS_ENABLED(CONFIG_PSE_CONTROLLER))
+ return NULL;
+
+ np = to_of_node(fwnode);
+ if (!np)
+ return NULL;
+
+ psec = of_pse_control_get(np);
+ if (PTR_ERR(psec) == -ENOENT)
+ return NULL;
+
+ return psec;
+}
+
static struct mii_timestamper *
fwnode_find_mii_timestamper(struct fwnode_handle *fwnode)
{
@@ -91,14 +112,21 @@ int fwnode_mdiobus_register_phy(struct mii_bus *bus,
struct fwnode_handle *child, u32 addr)
{
struct mii_timestamper *mii_ts = NULL;
+ struct pse_control *psec = NULL;
struct phy_device *phy;
bool is_c45 = false;
u32 phy_id;
int rc;
+ psec = fwnode_find_pse_control(child);
+ if (IS_ERR(psec))
+ return PTR_ERR(psec);
+
mii_ts = fwnode_find_mii_timestamper(child);
- if (IS_ERR(mii_ts))
- return PTR_ERR(mii_ts);
+ if (IS_ERR(mii_ts)) {
+ rc = PTR_ERR(mii_ts);
+ goto clean_pse;
+ }
rc = fwnode_property_match_string(child, "compatible",
"ethernet-phy-ieee802.3-c45");
@@ -110,8 +138,8 @@ int fwnode_mdiobus_register_phy(struct mii_bus *bus,
else
phy = phy_device_create(bus, addr, phy_id, 0, NULL);
if (IS_ERR(phy)) {
- unregister_mii_timestamper(mii_ts);
- return PTR_ERR(phy);
+ rc = PTR_ERR(phy);
+ goto clean_mii_ts;
}
if (is_acpi_node(child)) {
@@ -125,25 +153,33 @@ int fwnode_mdiobus_register_phy(struct mii_bus *bus,
/* All data is now stored in the phy struct, so register it */
rc = phy_device_register(phy);
if (rc) {
- phy_device_free(phy);
fwnode_handle_put(phy->mdio.dev.fwnode);
- return rc;
+ goto clean_phy;
}
} else if (is_of_node(child)) {
rc = fwnode_mdiobus_phy_device_register(bus, phy, child, addr);
- if (rc) {
- unregister_mii_timestamper(mii_ts);
- phy_device_free(phy);
- return rc;
- }
+ if (rc)
+ goto clean_phy;
}
+ phy->psec = psec;
+
/* phy->mii_ts may already be defined by the PHY driver. A
* mii_timestamper probed via the device tree will still have
* precedence.
*/
if (mii_ts)
phy->mii_ts = mii_ts;
+
return 0;
+
+clean_phy:
+ phy_device_free(phy);
+clean_mii_ts:
+ unregister_mii_timestamper(mii_ts);
+clean_pse:
+ pse_control_put(psec);
+
+ return rc;
}
EXPORT_SYMBOL(fwnode_mdiobus_register_phy);
diff --git a/drivers/net/mdio/mdio-i2c.c b/drivers/net/mdio/mdio-i2c.c
index 09200a70b315..bf8bf5e20faf 100644
--- a/drivers/net/mdio/mdio-i2c.c
+++ b/drivers/net/mdio/mdio-i2c.c
@@ -3,6 +3,7 @@
* MDIO I2C bridge
*
* Copyright (C) 2015-2016 Russell King
+ * Copyright (C) 2021 Marek Behun
*
* Network PHYs can appear on I2C buses when they are part of SFP module.
* This driver exposes these PHYs to the networking PHY code, allowing
@@ -12,6 +13,7 @@
#include <linux/i2c.h>
#include <linux/mdio/mdio-i2c.h>
#include <linux/phy.h>
+#include <linux/sfp.h>
/*
* I2C bus addresses 0x50 and 0x51 are normally an EEPROM, which is
@@ -28,7 +30,7 @@ static unsigned int i2c_mii_phy_addr(int phy_id)
return phy_id + 0x40;
}
-static int i2c_mii_read(struct mii_bus *bus, int phy_id, int reg)
+static int i2c_mii_read_default(struct mii_bus *bus, int phy_id, int reg)
{
struct i2c_adapter *i2c = bus->priv;
struct i2c_msg msgs[2];
@@ -62,7 +64,8 @@ static int i2c_mii_read(struct mii_bus *bus, int phy_id, int reg)
return data[0] << 8 | data[1];
}
-static int i2c_mii_write(struct mii_bus *bus, int phy_id, int reg, u16 val)
+static int i2c_mii_write_default(struct mii_bus *bus, int phy_id, int reg,
+ u16 val)
{
struct i2c_adapter *i2c = bus->priv;
struct i2c_msg msg;
@@ -91,9 +94,288 @@ static int i2c_mii_write(struct mii_bus *bus, int phy_id, int reg, u16 val)
return ret < 0 ? ret : 0;
}
-struct mii_bus *mdio_i2c_alloc(struct device *parent, struct i2c_adapter *i2c)
+/* RollBall SFPs do not access internal PHY via I2C address 0x56, but
+ * instead via address 0x51, when SFP page is set to 0x03 and password to
+ * 0xffffffff.
+ *
+ * address size contents description
+ * ------- ---- -------- -----------
+ * 0x80 1 CMD 0x01/0x02/0x04 for write/read/done
+ * 0x81 1 DEV Clause 45 device
+ * 0x82 2 REG Clause 45 register
+ * 0x84 2 VAL Register value
+ */
+#define ROLLBALL_PHY_I2C_ADDR 0x51
+
+#define ROLLBALL_PASSWORD (SFP_VSL + 3)
+
+#define ROLLBALL_CMD_ADDR 0x80
+#define ROLLBALL_DATA_ADDR 0x81
+
+#define ROLLBALL_CMD_WRITE 0x01
+#define ROLLBALL_CMD_READ 0x02
+#define ROLLBALL_CMD_DONE 0x04
+
+#define SFP_PAGE_ROLLBALL_MDIO 3
+
+static int __i2c_transfer_err(struct i2c_adapter *i2c, struct i2c_msg *msgs,
+ int num)
+{
+ int ret;
+
+ ret = __i2c_transfer(i2c, msgs, num);
+ if (ret < 0)
+ return ret;
+ else if (ret != num)
+ return -EIO;
+ else
+ return 0;
+}
+
+static int __i2c_rollball_get_page(struct i2c_adapter *i2c, int bus_addr,
+ u8 *page)
+{
+ struct i2c_msg msgs[2];
+ u8 addr = SFP_PAGE;
+
+ msgs[0].addr = bus_addr;
+ msgs[0].flags = 0;
+ msgs[0].len = 1;
+ msgs[0].buf = &addr;
+
+ msgs[1].addr = bus_addr;
+ msgs[1].flags = I2C_M_RD;
+ msgs[1].len = 1;
+ msgs[1].buf = page;
+
+ return __i2c_transfer_err(i2c, msgs, 2);
+}
+
+static int __i2c_rollball_set_page(struct i2c_adapter *i2c, int bus_addr,
+ u8 page)
+{
+ struct i2c_msg msg;
+ u8 buf[2];
+
+ buf[0] = SFP_PAGE;
+ buf[1] = page;
+
+ msg.addr = bus_addr;
+ msg.flags = 0;
+ msg.len = 2;
+ msg.buf = buf;
+
+ return __i2c_transfer_err(i2c, &msg, 1);
+}
+
+/* In order to not interfere with other SFP code (which possibly may manipulate
+ * SFP_PAGE), for every transfer we do this:
+ * 1. lock the bus
+ * 2. save content of SFP_PAGE
+ * 3. set SFP_PAGE to 3
+ * 4. do the transfer
+ * 5. restore original SFP_PAGE
+ * 6. unlock the bus
+ * Note that one might think that steps 2 to 5 could be theoretically done all
+ * in one call to i2c_transfer (by constructing msgs array in such a way), but
+ * unfortunately tests show that this does not work :-( Changed SFP_PAGE does
+ * not take into account until i2c_transfer() is done.
+ */
+static int i2c_transfer_rollball(struct i2c_adapter *i2c,
+ struct i2c_msg *msgs, int num)
+{
+ int ret, main_err = 0;
+ u8 saved_page;
+
+ i2c_lock_bus(i2c, I2C_LOCK_SEGMENT);
+
+ /* save original page */
+ ret = __i2c_rollball_get_page(i2c, msgs->addr, &saved_page);
+ if (ret)
+ goto unlock;
+
+ /* change to RollBall MDIO page */
+ ret = __i2c_rollball_set_page(i2c, msgs->addr, SFP_PAGE_ROLLBALL_MDIO);
+ if (ret)
+ goto unlock;
+
+ /* do the transfer; we try to restore original page if this fails */
+ ret = __i2c_transfer_err(i2c, msgs, num);
+ if (ret)
+ main_err = ret;
+
+ /* restore original page */
+ ret = __i2c_rollball_set_page(i2c, msgs->addr, saved_page);
+
+unlock:
+ i2c_unlock_bus(i2c, I2C_LOCK_SEGMENT);
+
+ return main_err ? : ret;
+}
+
+static int i2c_rollball_mii_poll(struct mii_bus *bus, int bus_addr, u8 *buf,
+ size_t len)
+{
+ struct i2c_adapter *i2c = bus->priv;
+ struct i2c_msg msgs[2];
+ u8 cmd_addr, tmp, *res;
+ int i, ret;
+
+ cmd_addr = ROLLBALL_CMD_ADDR;
+
+ res = buf ? buf : &tmp;
+ len = buf ? len : 1;
+
+ msgs[0].addr = bus_addr;
+ msgs[0].flags = 0;
+ msgs[0].len = 1;
+ msgs[0].buf = &cmd_addr;
+
+ msgs[1].addr = bus_addr;
+ msgs[1].flags = I2C_M_RD;
+ msgs[1].len = len;
+ msgs[1].buf = res;
+
+ /* By experiment it takes up to 70 ms to access a register for these
+ * SFPs. Sleep 20ms between iterations and try 10 times.
+ */
+ i = 10;
+ do {
+ msleep(20);
+
+ ret = i2c_transfer_rollball(i2c, msgs, ARRAY_SIZE(msgs));
+ if (ret)
+ return ret;
+
+ if (*res == ROLLBALL_CMD_DONE)
+ return 0;
+ } while (i-- > 0);
+
+ dev_dbg(&bus->dev, "poll timed out\n");
+
+ return -ETIMEDOUT;
+}
+
+static int i2c_rollball_mii_cmd(struct mii_bus *bus, int bus_addr, u8 cmd,
+ u8 *data, size_t len)
+{
+ struct i2c_adapter *i2c = bus->priv;
+ struct i2c_msg msgs[2];
+ u8 cmdbuf[2];
+
+ cmdbuf[0] = ROLLBALL_CMD_ADDR;
+ cmdbuf[1] = cmd;
+
+ msgs[0].addr = bus_addr;
+ msgs[0].flags = 0;
+ msgs[0].len = len;
+ msgs[0].buf = data;
+
+ msgs[1].addr = bus_addr;
+ msgs[1].flags = 0;
+ msgs[1].len = sizeof(cmdbuf);
+ msgs[1].buf = cmdbuf;
+
+ return i2c_transfer_rollball(i2c, msgs, ARRAY_SIZE(msgs));
+}
+
+static int i2c_mii_read_rollball(struct mii_bus *bus, int phy_id, int reg)
+{
+ u8 buf[4], res[6];
+ int bus_addr, ret;
+ u16 val;
+
+ if (!(reg & MII_ADDR_C45))
+ return -EOPNOTSUPP;
+
+ bus_addr = i2c_mii_phy_addr(phy_id);
+ if (bus_addr != ROLLBALL_PHY_I2C_ADDR)
+ return 0xffff;
+
+ buf[0] = ROLLBALL_DATA_ADDR;
+ buf[1] = (reg >> 16) & 0x1f;
+ buf[2] = (reg >> 8) & 0xff;
+ buf[3] = reg & 0xff;
+
+ ret = i2c_rollball_mii_cmd(bus, bus_addr, ROLLBALL_CMD_READ, buf,
+ sizeof(buf));
+ if (ret < 0)
+ return ret;
+
+ ret = i2c_rollball_mii_poll(bus, bus_addr, res, sizeof(res));
+ if (ret == -ETIMEDOUT)
+ return 0xffff;
+ else if (ret < 0)
+ return ret;
+
+ val = res[4] << 8 | res[5];
+
+ return val;
+}
+
+static int i2c_mii_write_rollball(struct mii_bus *bus, int phy_id, int reg,
+ u16 val)
+{
+ int bus_addr, ret;
+ u8 buf[6];
+
+ if (!(reg & MII_ADDR_C45))
+ return -EOPNOTSUPP;
+
+ bus_addr = i2c_mii_phy_addr(phy_id);
+ if (bus_addr != ROLLBALL_PHY_I2C_ADDR)
+ return 0;
+
+ buf[0] = ROLLBALL_DATA_ADDR;
+ buf[1] = (reg >> 16) & 0x1f;
+ buf[2] = (reg >> 8) & 0xff;
+ buf[3] = reg & 0xff;
+ buf[4] = val >> 8;
+ buf[5] = val & 0xff;
+
+ ret = i2c_rollball_mii_cmd(bus, bus_addr, ROLLBALL_CMD_WRITE, buf,
+ sizeof(buf));
+ if (ret < 0)
+ return ret;
+
+ ret = i2c_rollball_mii_poll(bus, bus_addr, NULL, 0);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static int i2c_mii_init_rollball(struct i2c_adapter *i2c)
+{
+ struct i2c_msg msg;
+ u8 pw[5];
+ int ret;
+
+ pw[0] = ROLLBALL_PASSWORD;
+ pw[1] = 0xff;
+ pw[2] = 0xff;
+ pw[3] = 0xff;
+ pw[4] = 0xff;
+
+ msg.addr = ROLLBALL_PHY_I2C_ADDR;
+ msg.flags = 0;
+ msg.len = sizeof(pw);
+ msg.buf = pw;
+
+ ret = i2c_transfer(i2c, &msg, 1);
+ if (ret < 0)
+ return ret;
+ else if (ret != 1)
+ return -EIO;
+ else
+ return 0;
+}
+
+struct mii_bus *mdio_i2c_alloc(struct device *parent, struct i2c_adapter *i2c,
+ enum mdio_i2c_proto protocol)
{
struct mii_bus *mii;
+ int ret;
if (!i2c_check_functionality(i2c, I2C_FUNC_I2C))
return ERR_PTR(-EINVAL);
@@ -104,10 +386,28 @@ struct mii_bus *mdio_i2c_alloc(struct device *parent, struct i2c_adapter *i2c)
snprintf(mii->id, MII_BUS_ID_SIZE, "i2c:%s", dev_name(parent));
mii->parent = parent;
- mii->read = i2c_mii_read;
- mii->write = i2c_mii_write;
mii->priv = i2c;
+ switch (protocol) {
+ case MDIO_I2C_ROLLBALL:
+ ret = i2c_mii_init_rollball(i2c);
+ if (ret < 0) {
+ dev_err(parent,
+ "Cannot initialize RollBall MDIO I2C protocol: %d\n",
+ ret);
+ mdiobus_free(mii);
+ return ERR_PTR(ret);
+ }
+
+ mii->read = i2c_mii_read_rollball;
+ mii->write = i2c_mii_write_rollball;
+ break;
+ default:
+ mii->read = i2c_mii_read_default;
+ mii->write = i2c_mii_write_default;
+ break;
+ }
+
return mii;
}
EXPORT_SYMBOL_GPL(mdio_i2c_alloc);
diff --git a/drivers/net/mdio/mdio-mscc-miim.c b/drivers/net/mdio/mdio-mscc-miim.c
index 08541007b18a..51f68daac152 100644
--- a/drivers/net/mdio/mdio-mscc-miim.c
+++ b/drivers/net/mdio/mdio-mscc-miim.c
@@ -12,6 +12,7 @@
#include <linux/iopoll.h>
#include <linux/kernel.h>
#include <linux/mdio/mdio-mscc-miim.h>
+#include <linux/mfd/ocelot.h>
#include <linux/module.h>
#include <linux/of_mdio.h>
#include <linux/phy.h>
@@ -270,44 +271,25 @@ static int mscc_miim_clk_set(struct mii_bus *bus)
static int mscc_miim_probe(struct platform_device *pdev)
{
- struct regmap *mii_regmap, *phy_regmap = NULL;
struct device_node *np = pdev->dev.of_node;
+ struct regmap *mii_regmap, *phy_regmap;
struct device *dev = &pdev->dev;
- void __iomem *regs, *phy_regs;
struct mscc_miim_dev *miim;
- struct resource *res;
struct mii_bus *bus;
int ret;
- regs = devm_platform_get_and_ioremap_resource(pdev, 0, NULL);
- if (IS_ERR(regs)) {
- dev_err(dev, "Unable to map MIIM registers\n");
- return PTR_ERR(regs);
- }
-
- mii_regmap = devm_regmap_init_mmio(dev, regs, &mscc_miim_regmap_config);
-
- if (IS_ERR(mii_regmap)) {
- dev_err(dev, "Unable to create MIIM regmap\n");
- return PTR_ERR(mii_regmap);
- }
+ mii_regmap = ocelot_regmap_from_resource(pdev, 0,
+ &mscc_miim_regmap_config);
+ if (IS_ERR(mii_regmap))
+ return dev_err_probe(dev, PTR_ERR(mii_regmap),
+ "Unable to create MIIM regmap\n");
/* This resource is optional */
- res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
- if (res) {
- phy_regs = devm_ioremap_resource(dev, res);
- if (IS_ERR(phy_regs)) {
- dev_err(dev, "Unable to map internal phy registers\n");
- return PTR_ERR(phy_regs);
- }
-
- phy_regmap = devm_regmap_init_mmio(dev, phy_regs,
- &mscc_miim_phy_regmap_config);
- if (IS_ERR(phy_regmap)) {
- dev_err(dev, "Unable to create phy register regmap\n");
- return PTR_ERR(phy_regmap);
- }
- }
+ phy_regmap = ocelot_regmap_from_resource_optional(pdev, 1,
+ &mscc_miim_phy_regmap_config);
+ if (IS_ERR(phy_regmap))
+ return dev_err_probe(dev, PTR_ERR(phy_regmap),
+ "Unable to create phy register regmap\n");
ret = mscc_miim_setup(dev, &bus, "mscc_miim", mii_regmap, 0);
if (ret < 0) {
diff --git a/drivers/net/mdio/mdio-mux-meson-g12a.c b/drivers/net/mdio/mdio-mux-meson-g12a.c
index b8866bc3f2e8..4a2e94faf57e 100644
--- a/drivers/net/mdio/mdio-mux-meson-g12a.c
+++ b/drivers/net/mdio/mdio-mux-meson-g12a.c
@@ -233,11 +233,9 @@ static int g12a_ephy_glue_clk_register(struct device *dev)
snprintf(in_name, sizeof(in_name), "clkin%d", i);
clk = devm_clk_get(dev, in_name);
- if (IS_ERR(clk)) {
- if (PTR_ERR(clk) != -EPROBE_DEFER)
- dev_err(dev, "Missing clock %s\n", in_name);
- return PTR_ERR(clk);
- }
+ if (IS_ERR(clk))
+ return dev_err_probe(dev, PTR_ERR(clk),
+ "Missing clock %s\n", in_name);
parent_names[i] = __clk_get_name(clk);
}
@@ -317,12 +315,9 @@ static int g12a_mdio_mux_probe(struct platform_device *pdev)
return PTR_ERR(priv->regs);
priv->pclk = devm_clk_get(dev, "pclk");
- if (IS_ERR(priv->pclk)) {
- ret = PTR_ERR(priv->pclk);
- if (ret != -EPROBE_DEFER)
- dev_err(dev, "failed to get peripheral clock\n");
- return ret;
- }
+ if (IS_ERR(priv->pclk))
+ return dev_err_probe(dev, PTR_ERR(priv->pclk),
+ "failed to get peripheral clock\n");
/* Make sure the device registers are clocked */
ret = clk_prepare_enable(priv->pclk);
@@ -339,8 +334,7 @@ static int g12a_mdio_mux_probe(struct platform_device *pdev)
ret = mdio_mux_init(dev, dev->of_node, g12a_mdio_switch_fn,
&priv->mux_handle, dev, NULL);
if (ret) {
- if (ret != -EPROBE_DEFER)
- dev_err(dev, "mdio multiplexer init failed: %d", ret);
+ dev_err_probe(dev, ret, "mdio multiplexer init failed\n");
goto err;
}
diff --git a/drivers/net/mdio/mdio-mux-mmioreg.c b/drivers/net/mdio/mdio-mux-mmioreg.c
index c02fb2a067ee..c02c9c660016 100644
--- a/drivers/net/mdio/mdio-mux-mmioreg.c
+++ b/drivers/net/mdio/mdio-mux-mmioreg.c
@@ -159,12 +159,9 @@ static int mdio_mux_mmioreg_probe(struct platform_device *pdev)
ret = mdio_mux_init(&pdev->dev, pdev->dev.of_node,
mdio_mux_mmioreg_switch_fn,
&s->mux_handle, s, NULL);
- if (ret) {
- if (ret != -EPROBE_DEFER)
- dev_err(&pdev->dev,
- "failed to register mdio-mux bus %pOF\n", np);
- return ret;
- }
+ if (ret)
+ return dev_err_probe(&pdev->dev, ret,
+ "failed to register mdio-mux bus %pOF\n", np);
pdev->dev.platform_data = s;
diff --git a/drivers/net/mdio/mdio-mux-multiplexer.c b/drivers/net/mdio/mdio-mux-multiplexer.c
index 527acfc3c045..bfa5af577b0a 100644
--- a/drivers/net/mdio/mdio-mux-multiplexer.c
+++ b/drivers/net/mdio/mdio-mux-multiplexer.c
@@ -72,12 +72,9 @@ static int mdio_mux_multiplexer_probe(struct platform_device *pdev)
return -ENOMEM;
s->muxc = devm_mux_control_get(dev, NULL);
- if (IS_ERR(s->muxc)) {
- ret = PTR_ERR(s->muxc);
- if (ret != -EPROBE_DEFER)
- dev_err(&pdev->dev, "Failed to get mux: %d\n", ret);
- return ret;
- }
+ if (IS_ERR(s->muxc))
+ return dev_err_probe(&pdev->dev, PTR_ERR(s->muxc),
+ "Failed to get mux\n");
platform_set_drvdata(pdev, s);
diff --git a/drivers/net/mdio/of_mdio.c b/drivers/net/mdio/of_mdio.c
index 9e3c815a070f..796e9c7857d0 100644
--- a/drivers/net/mdio/of_mdio.c
+++ b/drivers/net/mdio/of_mdio.c
@@ -231,6 +231,7 @@ int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np)
return 0;
unregister:
+ of_node_put(child);
mdiobus_unregister(mdio);
return rc;
}
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-28 23:28:36 +0300