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-rw-r--r--drivers/net/phy/phy_device.c12
-rw-r--r--include/linux/mod_devicetable.h26
-rw-r--r--include/linux/phy.h1
-rw-r--r--scripts/mod/file2alias.c26
4 files changed, 65 insertions, 0 deletions
diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
index db1794546c5..1a99bb24410 100644
--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -149,6 +149,7 @@ EXPORT_SYMBOL(phy_scan_fixups);
struct phy_device* phy_device_create(struct mii_bus *bus, int addr, int phy_id)
{
struct phy_device *dev;
+
/* We allocate the device, and initialize the
* default values */
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
@@ -179,6 +180,17 @@ struct phy_device* phy_device_create(struct mii_bus *bus, int addr, int phy_id)
mutex_init(&dev->lock);
INIT_DELAYED_WORK(&dev->state_queue, phy_state_machine);
+ /* Request the appropriate module unconditionally; don't
+ bother trying to do so only if it isn't already loaded,
+ because that gets complicated. A hotplug event would have
+ done an unconditional modprobe anyway.
+ We don't do normal hotplug because it won't work for MDIO
+ -- because it relies on the device staying around for long
+ enough for the driver to get loaded. With MDIO, the NIC
+ driver will get bored and give up as soon as it finds that
+ there's no driver _already_ loaded. */
+ request_module(MDIO_MODULE_PREFIX MDIO_ID_FMT, MDIO_ID_ARGS(phy_id));
+
return dev;
}
EXPORT_SYMBOL(phy_device_create);
diff --git a/include/linux/mod_devicetable.h b/include/linux/mod_devicetable.h
index f58e9d836f3..55f1f9c9506 100644
--- a/include/linux/mod_devicetable.h
+++ b/include/linux/mod_devicetable.h
@@ -474,4 +474,30 @@ struct platform_device_id {
__attribute__((aligned(sizeof(kernel_ulong_t))));
};
+#define MDIO_MODULE_PREFIX "mdio:"
+
+#define MDIO_ID_FMT "%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d"
+#define MDIO_ID_ARGS(_id) \
+ (_id)>>31, ((_id)>>30) & 1, ((_id)>>29) & 1, ((_id)>>28) & 1, \
+ ((_id)>>27) & 1, ((_id)>>26) & 1, ((_id)>>25) & 1, ((_id)>>24) & 1, \
+ ((_id)>>23) & 1, ((_id)>>22) & 1, ((_id)>>21) & 1, ((_id)>>20) & 1, \
+ ((_id)>>19) & 1, ((_id)>>18) & 1, ((_id)>>17) & 1, ((_id)>>16) & 1, \
+ ((_id)>>15) & 1, ((_id)>>14) & 1, ((_id)>>13) & 1, ((_id)>>12) & 1, \
+ ((_id)>>11) & 1, ((_id)>>10) & 1, ((_id)>>9) & 1, ((_id)>>8) & 1, \
+ ((_id)>>7) & 1, ((_id)>>6) & 1, ((_id)>>5) & 1, ((_id)>>4) & 1, \
+ ((_id)>>3) & 1, ((_id)>>2) & 1, ((_id)>>1) & 1, (_id) & 1
+
+/**
+ * struct mdio_device_id - identifies PHY devices on an MDIO/MII bus
+ * @phy_id: The result of
+ * (mdio_read(&MII_PHYSID1) << 16 | mdio_read(&PHYSID2)) & @phy_id_mask
+ * for this PHY type
+ * @phy_id_mask: Defines the significant bits of @phy_id. A value of 0
+ * is used to terminate an array of struct mdio_device_id.
+ */
+struct mdio_device_id {
+ __u32 phy_id;
+ __u32 phy_id_mask;
+};
+
#endif /* LINUX_MOD_DEVICETABLE_H */
diff --git a/include/linux/phy.h b/include/linux/phy.h
index d9bce4b526b..987e111f7b1 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -24,6 +24,7 @@
#include <linux/mii.h>
#include <linux/timer.h>
#include <linux/workqueue.h>
+#include <linux/mod_devicetable.h>
#include <asm/atomic.h>
diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c
index 220213e603d..36a60a85317 100644
--- a/scripts/mod/file2alias.c
+++ b/scripts/mod/file2alias.c
@@ -796,6 +796,28 @@ static int do_platform_entry(const char *filename,
return 1;
}
+static int do_mdio_entry(const char *filename,
+ struct mdio_device_id *id, char *alias)
+{
+ int i;
+
+ alias += sprintf(alias, MDIO_MODULE_PREFIX);
+
+ for (i = 0; i < 32; i++) {
+ if (!((id->phy_id_mask >> (31-i)) & 1))
+ *(alias++) = '?';
+ else if ((id->phy_id >> (31-i)) & 1)
+ *(alias++) = '1';
+ else
+ *(alias++) = '0';
+ }
+
+ /* Terminate the string */
+ *alias = 0;
+
+ return 1;
+}
+
/* Ignore any prefix, eg. some architectures prepend _ */
static inline int sym_is(const char *symbol, const char *name)
{
@@ -943,6 +965,10 @@ void handle_moddevtable(struct module *mod, struct elf_info *info,
do_table(symval, sym->st_size,
sizeof(struct platform_device_id), "platform",
do_platform_entry, mod);
+ else if (sym_is(symname, "__mod_mdio_device_table"))
+ do_table(symval, sym->st_size,
+ sizeof(struct mdio_device_id), "mdio",
+ do_mdio_entry, mod);
free(zeros);
}