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