From bedbef8ad3e75a304af6361af235302bcc61d06b Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 14 May 2024 06:39:01 +0000
Subject: [PATCH] 修改内核路径
---
kernel/drivers/net/phy/fixed_phy.c | 179 +++++++++++++++++++++++++++++++++++++++++++----------------
1 files changed, 129 insertions(+), 50 deletions(-)
diff --git a/kernel/drivers/net/phy/fixed_phy.c b/kernel/drivers/net/phy/fixed_phy.c
index 5982016..18d81f4 100644
--- a/kernel/drivers/net/phy/fixed_phy.c
+++ b/kernel/drivers/net/phy/fixed_phy.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
/*
* Fixed MDIO bus (MDIO bus emulation with fixed PHYs)
*
@@ -5,11 +6,6 @@
* Anton Vorontsov <avorontsov@ru.mvista.com>
*
* Copyright (c) 2006-2007 MontaVista Software, Inc.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
*/
#include <linux/kernel.h>
@@ -22,9 +18,10 @@
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/of.h>
-#include <linux/gpio.h>
-#include <linux/seqlock.h>
+#include <linux/gpio/consumer.h>
#include <linux/idr.h>
+#include <linux/netdevice.h>
+#include <linux/linkmode.h>
#include "swphy.h"
@@ -36,11 +33,11 @@
struct fixed_phy {
int addr;
struct phy_device *phydev;
- seqcount_t seqcount;
struct fixed_phy_status status;
+ bool no_carrier;
int (*link_update)(struct net_device *, struct fixed_phy_status *);
struct list_head node;
- int link_gpio;
+ struct gpio_desc *link_gpiod;
};
static struct platform_device *pdev;
@@ -48,10 +45,29 @@
.phys = LIST_HEAD_INIT(platform_fmb.phys),
};
+int fixed_phy_change_carrier(struct net_device *dev, bool new_carrier)
+{
+ struct fixed_mdio_bus *fmb = &platform_fmb;
+ struct phy_device *phydev = dev->phydev;
+ struct fixed_phy *fp;
+
+ if (!phydev || !phydev->mdio.bus)
+ return -EINVAL;
+
+ list_for_each_entry(fp, &fmb->phys, node) {
+ if (fp->addr == phydev->mdio.addr) {
+ fp->no_carrier = !new_carrier;
+ return 0;
+ }
+ }
+ return -EINVAL;
+}
+EXPORT_SYMBOL_GPL(fixed_phy_change_carrier);
+
static void fixed_phy_update(struct fixed_phy *fp)
{
- if (gpio_is_valid(fp->link_gpio))
- fp->status.link = !!gpio_get_value_cansleep(fp->link_gpio);
+ if (!fp->no_carrier && fp->link_gpiod)
+ fp->status.link = !!gpiod_get_value_cansleep(fp->link_gpiod);
}
static int fixed_mdio_read(struct mii_bus *bus, int phy_addr, int reg_num)
@@ -62,18 +78,17 @@
list_for_each_entry(fp, &fmb->phys, node) {
if (fp->addr == phy_addr) {
struct fixed_phy_status state;
- int s;
- do {
- s = read_seqcount_begin(&fp->seqcount);
- /* Issue callback if user registered it. */
- if (fp->link_update)
- fp->link_update(fp->phydev->attached_dev,
- &fp->status);
- /* Check the GPIO for change in status */
- fixed_phy_update(fp);
- state = fp->status;
- } while (read_seqcount_retry(&fp->seqcount, s));
+ fp->status.link = !fp->no_carrier;
+
+ /* Issue callback if user registered it. */
+ if (fp->link_update)
+ fp->link_update(fp->phydev->attached_dev,
+ &fp->status);
+
+ /* Check the GPIO for change in status */
+ fixed_phy_update(fp);
+ state = fp->status;
return swphy_read_reg(reg_num, &state);
}
@@ -115,9 +130,9 @@
}
EXPORT_SYMBOL_GPL(fixed_phy_set_link_update);
-int fixed_phy_add(unsigned int irq, int phy_addr,
- struct fixed_phy_status *status,
- int link_gpio)
+static int fixed_phy_add_gpiod(unsigned int irq, int phy_addr,
+ struct fixed_phy_status *status,
+ struct gpio_desc *gpiod)
{
int ret;
struct fixed_mdio_bus *fmb = &platform_fmb;
@@ -131,31 +146,24 @@
if (!fp)
return -ENOMEM;
- seqcount_init(&fp->seqcount);
-
if (irq != PHY_POLL)
fmb->mii_bus->irq[phy_addr] = irq;
fp->addr = phy_addr;
fp->status = *status;
- fp->link_gpio = link_gpio;
-
- if (gpio_is_valid(fp->link_gpio)) {
- ret = gpio_request_one(fp->link_gpio, GPIOF_DIR_IN,
- "fixed-link-gpio-link");
- if (ret)
- goto err_regs;
- }
+ fp->link_gpiod = gpiod;
fixed_phy_update(fp);
list_add_tail(&fp->node, &fmb->phys);
return 0;
+}
-err_regs:
- kfree(fp);
- return ret;
+int fixed_phy_add(unsigned int irq, int phy_addr,
+ struct fixed_phy_status *status) {
+
+ return fixed_phy_add_gpiod(irq, phy_addr, status, NULL);
}
EXPORT_SYMBOL_GPL(fixed_phy_add);
@@ -169,8 +177,8 @@
list_for_each_entry_safe(fp, tmp, &fmb->phys, node) {
if (fp->addr == phy_addr) {
list_del(&fp->node);
- if (gpio_is_valid(fp->link_gpio))
- gpio_free(fp->link_gpio);
+ if (fp->link_gpiod)
+ gpiod_put(fp->link_gpiod);
kfree(fp);
ida_simple_remove(&phy_fixed_ida, phy_addr);
return;
@@ -178,10 +186,47 @@
}
}
-struct phy_device *fixed_phy_register(unsigned int irq,
- struct fixed_phy_status *status,
- int link_gpio,
- struct device_node *np)
+#ifdef CONFIG_OF_GPIO
+static struct gpio_desc *fixed_phy_get_gpiod(struct device_node *np)
+{
+ struct device_node *fixed_link_node;
+ struct gpio_desc *gpiod;
+
+ if (!np)
+ return NULL;
+
+ fixed_link_node = of_get_child_by_name(np, "fixed-link");
+ if (!fixed_link_node)
+ return NULL;
+
+ /*
+ * As the fixed link is just a device tree node without any
+ * Linux device associated with it, we simply have obtain
+ * the GPIO descriptor from the device tree like this.
+ */
+ gpiod = fwnode_gpiod_get_index(of_fwnode_handle(fixed_link_node),
+ "link", 0, GPIOD_IN, "mdio");
+ if (IS_ERR(gpiod) && PTR_ERR(gpiod) != -EPROBE_DEFER) {
+ if (PTR_ERR(gpiod) != -ENOENT)
+ pr_err("error getting GPIO for fixed link %pOF, proceed without\n",
+ fixed_link_node);
+ gpiod = NULL;
+ }
+ of_node_put(fixed_link_node);
+
+ return gpiod;
+}
+#else
+static struct gpio_desc *fixed_phy_get_gpiod(struct device_node *np)
+{
+ return NULL;
+}
+#endif
+
+static struct phy_device *__fixed_phy_register(unsigned int irq,
+ struct fixed_phy_status *status,
+ struct device_node *np,
+ struct gpio_desc *gpiod)
{
struct fixed_mdio_bus *fmb = &platform_fmb;
struct phy_device *phy;
@@ -191,12 +236,19 @@
if (!fmb->mii_bus || fmb->mii_bus->state != MDIOBUS_REGISTERED)
return ERR_PTR(-EPROBE_DEFER);
+ /* Check if we have a GPIO associated with this fixed phy */
+ if (!gpiod) {
+ gpiod = fixed_phy_get_gpiod(np);
+ if (IS_ERR(gpiod))
+ return ERR_CAST(gpiod);
+ }
+
/* Get the next available PHY address, up to PHY_MAX_ADDR */
phy_addr = ida_simple_get(&phy_fixed_ida, 0, PHY_MAX_ADDR, GFP_KERNEL);
if (phy_addr < 0)
return ERR_PTR(phy_addr);
- ret = fixed_phy_add(irq, phy_addr, status, link_gpio);
+ ret = fixed_phy_add_gpiod(irq, phy_addr, status, gpiod);
if (ret < 0) {
ida_simple_remove(&phy_fixed_ida, phy_addr);
return ERR_PTR(ret);
@@ -223,15 +275,26 @@
switch (status->speed) {
case SPEED_1000:
- phy->supported = PHY_1000BT_FEATURES;
- break;
+ linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT,
+ phy->supported);
+ linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
+ phy->supported);
+ fallthrough;
case SPEED_100:
- phy->supported = PHY_100BT_FEATURES;
- break;
+ linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT,
+ phy->supported);
+ linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT,
+ phy->supported);
+ fallthrough;
case SPEED_10:
default:
- phy->supported = PHY_10BT_FEATURES;
+ linkmode_set_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT,
+ phy->supported);
+ linkmode_set_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT,
+ phy->supported);
}
+
+ phy_advertise_supported(phy);
ret = phy_device_register(phy);
if (ret) {
@@ -243,8 +306,24 @@
return phy;
}
+
+struct phy_device *fixed_phy_register(unsigned int irq,
+ struct fixed_phy_status *status,
+ struct device_node *np)
+{
+ return __fixed_phy_register(irq, status, np, NULL);
+}
EXPORT_SYMBOL_GPL(fixed_phy_register);
+struct phy_device *
+fixed_phy_register_with_gpiod(unsigned int irq,
+ struct fixed_phy_status *status,
+ struct gpio_desc *gpiod)
+{
+ return __fixed_phy_register(irq, status, NULL, gpiod);
+}
+EXPORT_SYMBOL_GPL(fixed_phy_register_with_gpiod);
+
void fixed_phy_unregister(struct phy_device *phy)
{
phy_device_remove(phy);
--
Gitblit v1.6.2