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From b8d5957374dc0e6ec8687c6e1b154ea066d27a5b Mon Sep 17 00:00:00 2001
From: Phil Sutter <phil@nwl.cc>
Date: Wed, 14 May 2014 02:44:43 +0200
Subject: [PATCH] phy: add mdio boardinfo
---
drivers/net/Makefile | 2 +-
drivers/net/phy/Kconfig | 4 +++
drivers/net/phy/Makefile | 2 ++
drivers/net/phy/mdio-boardinfo.c | 58 ++++++++++++++++++++++++++++++++++++++++
drivers/net/phy/mdio-boardinfo.h | 22 +++++++++++++++
drivers/net/phy/mdio_bus.c | 20 ++++++++++++++
include/linux/phy.h | 18 +++++++++++++
7 files changed, 125 insertions(+), 1 deletion(-)
create mode 100644 drivers/net/phy/mdio-boardinfo.c
create mode 100644 drivers/net/phy/mdio-boardinfo.h
diff --git a/drivers/net/Makefile b/drivers/net/Makefile
index 3fef8a8..70b736b 100644
--- a/drivers/net/Makefile
+++ b/drivers/net/Makefile
@@ -15,7 +15,7 @@ obj-$(CONFIG_MII) += mii.o
obj-$(CONFIG_MDIO) += mdio.o
obj-$(CONFIG_NET) += Space.o loopback.o
obj-$(CONFIG_NETCONSOLE) += netconsole.o
-obj-$(CONFIG_PHYLIB) += phy/
+obj-y += phy/
obj-$(CONFIG_RIONET) += rionet.o
obj-$(CONFIG_NET_TEAM) += team/
obj-$(CONFIG_TUN) += tun.o
diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig
index 0414889..97ca8ec 100644
--- a/drivers/net/phy/Kconfig
+++ b/drivers/net/phy/Kconfig
@@ -12,6 +12,10 @@ menuconfig PHYLIB
if PHYLIB
+config MDIO_BOARDINFO
+ bool
+ default y
+
config SWCONFIG
tristate "Switch configuration API"
---help---
diff --git a/drivers/net/phy/Makefile b/drivers/net/phy/Makefile
index 3c76ff8..0c990a4 100644
--- a/drivers/net/phy/Makefile
+++ b/drivers/net/phy/Makefile
@@ -2,6 +2,8 @@
libphy-objs := phy.o phy_device.o mdio_bus.o
+obj-$(CONFIG_MDIO_BOARDINFO) += mdio-boardinfo.o
+
obj-$(CONFIG_PHYLIB) += libphy.o
obj-$(CONFIG_SWCONFIG) += swconfig.o
obj-$(CONFIG_MARVELL_PHY) += marvell.o
diff --git a/drivers/net/phy/mdio-boardinfo.c b/drivers/net/phy/mdio-boardinfo.c
new file mode 100644
index 0000000..9b8aaed
--- /dev/null
+++ b/drivers/net/phy/mdio-boardinfo.c
@@ -0,0 +1,58 @@
+/*
+ * mdio-boardinfo.c - collect pre-declarations of PHY devices
+ *
+ * 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>
+#include <linux/phy.h>
+#include <linux/slab.h>
+#include <linux/export.h>
+#include <linux/mutex.h>
+#include <linux/phy.h>
+
+#include "mdio-boardinfo.h"
+
+/*
+ * These symbols are exported ONLY FOR the mdio_bus component.
+ * No other users will be supported.
+ */
+
+LIST_HEAD(__mdio_board_list);
+EXPORT_SYMBOL_GPL(__mdio_board_list);
+
+DEFINE_MUTEX(__mdio_board_lock);
+EXPORT_SYMBOL_GPL(__mdio_board_lock);
+
+/**
+ * mdio_register_board_info - register PHY devices for a given board
+ * @info: array of chip descriptors
+ * @n: how many descriptors are provided
+ * Context: can sleep
+ *
+ * The board info passed can safely be __initdata ... but be careful of
+ * any embedded pointers (platform_data, etc), they're copied as-is.
+ */
+int __init
+mdiobus_register_board_info(struct mdio_board_info const *info, unsigned n)
+{
+ struct mdio_board_entry *be;
+ int i;
+
+ be = kzalloc(n * sizeof(*be), GFP_KERNEL);
+ if (!be)
+ return -ENOMEM;
+
+ for (i = 0; i < n; i++, be++, info++) {
+ memcpy(&be->board_info, info, sizeof(*info));
+ mutex_lock(&__mdio_board_lock);
+ list_add_tail(&be->list, &__mdio_board_list);
+ mutex_unlock(&__mdio_board_lock);
+ }
+
+ return 0;
+}
diff --git a/drivers/net/phy/mdio-boardinfo.h b/drivers/net/phy/mdio-boardinfo.h
new file mode 100644
index 0000000..28fbc0d
--- /dev/null
+++ b/drivers/net/phy/mdio-boardinfo.h
@@ -0,0 +1,22 @@
+/*
+ * mdio-boardinfo.h - boardinfo interface internal to the mdio_bus component
+ *
+ * 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/mutex.h>
+
+struct mdio_board_entry {
+ struct list_head list;
+ struct mdio_board_info board_info;
+};
+
+/* __mdio_board_lock protects __mdio_board_list
+ * only mdio_bus components are allowed to use these symbols.
+ */
+extern struct mutex __mdio_board_lock;
+extern struct list_head __mdio_board_list;
diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c
index 71e4900..50fbe35 100644
--- a/drivers/net/phy/mdio_bus.c
+++ b/drivers/net/phy/mdio_bus.c
@@ -38,6 +38,8 @@
#include <asm/irq.h>
+#include "mdio-boardinfo.h"
+
/**
* mdiobus_alloc_size - allocate a mii_bus structure
* @size: extra amount of memory to allocate for private storage.
@@ -224,15 +226,33 @@ void mdiobus_free(struct mii_bus *bus)
}
EXPORT_SYMBOL(mdiobus_free);
+static void mdiobus_setup_phydev_from_boardinfo(struct mii_bus *bus,
+ struct phy_device *phydev,
+ struct mdio_board_info *bi)
+{
+ if (strcmp(bus->id, bi->bus_id) ||
+ bi->phy_addr != phydev->addr)
+ return;
+
+ phydev->dev.platform_data = (void *) bi->platform_data;
+}
+
struct phy_device *mdiobus_scan(struct mii_bus *bus, int addr)
{
struct phy_device *phydev;
+ struct mdio_board_entry *be;
int err;
phydev = get_phy_device(bus, addr, false);
if (IS_ERR(phydev) || phydev == NULL)
return phydev;
+ mutex_lock(&__mdio_board_lock);
+ list_for_each_entry(be, &__mdio_board_list, list)
+ mdiobus_setup_phydev_from_boardinfo(bus, phydev,
+ &be->board_info);
+ mutex_unlock(&__mdio_board_lock);
+
err = phy_device_register(phydev);
if (err) {
phy_device_free(phydev);
diff --git a/include/linux/phy.h b/include/linux/phy.h
index f1441b4..9dca415 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -658,4 +658,22 @@ int __init mdio_bus_init(void);
void mdio_bus_exit(void);
extern struct bus_type mdio_bus_type;
+
+struct mdio_board_info {
+ const char *bus_id;
+ int phy_addr;
+
+ const void *platform_data;
+};
+
+#ifdef CONFIG_MDIO_BOARDINFO
+int mdiobus_register_board_info(const struct mdio_board_info *info, unsigned n);
+#else
+static inline int
+mdiobus_register_board_info(const struct mdio_board_info *info, unsigned n)
+{
+ return 0;
+}
+#endif
+
#endif /* __PHY_H */
--
1.8.5.3
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