PHY fixed driver: rework release path and update phy_id notation

device_bind_driver() error code returning has been fixed.  release()
function has been written, so that to free resources in correct way; the
release path is now clean.

Before the rework, it used to cause
 Device 'fixed@100:1' does not have a release() function, it is broken
 and must be fixed.
 BUG: at drivers/base/core.c:104 device_release()

 Call Trace:
  [<ffffffff802ec380>] kobject_cleanup+0x53/0x7e
  [<ffffffff802ec3ab>] kobject_release+0x0/0x9
  [<ffffffff802ecf3f>] kref_put+0x74/0x81
  [<ffffffff8035493b>] fixed_mdio_register_device+0x230/0x265
  [<ffffffff80564d31>] fixed_init+0x1f/0x35
  [<ffffffff802071a4>] init+0x147/0x2fb
  [<ffffffff80223b6e>] schedule_tail+0x36/0x92
  [<ffffffff8020a678>] child_rip+0xa/0x12
  [<ffffffff80311714>] acpi_ds_init_one_object+0x0/0x83
  [<ffffffff8020705d>] init+0x0/0x2fb
  [<ffffffff8020a66e>] child_rip+0x0/0x12

Also changed the notation of the fixed phy definition on
mdio bus to the form of <speed>+<duplex> to make it able to be used by
gianfar and ucc_geth that define phy_id strictly as "%d:%d" and cleaned up
the whitespace issues.

Signed-off-by: Vitaly Bordug <vitb@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

2 files changed, 169 insertions, 155 deletions

diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig
index dd09011c7ee5..432c210513be 100644
--- a/drivers/net/phy/Kconfig
+++ b/drivers/net/phy/Kconfig
@@ -76,4 +76,18 @@ config FIXED_MII_100_FDX
         bool "Emulation for 100M Fdx fixed PHY behavior"
         depends on FIXED_PHY
 
+config FIXED_MII_1000_FDX
+        bool "Emulation for 1000M Fdx fixed PHY behavior"
+        depends on FIXED_PHY
+
+config FIXED_MII_AMNT
+        int "Number of emulated PHYs to allocate "
+        depends on FIXED_PHY
+        default "1"
+        ---help---
+        Sometimes it is required to have several independent emulated
+        PHYs on the bus (in case of multi-eth but phy-less HW for instance).
+        This control will have specified number allocated for each fixed
+        PHY type enabled.
+
 endif # PHYLIB
diff --git a/drivers/net/phy/fixed.c b/drivers/net/phy/fixed.c
index bb966911a137..56191822fa26 100644
--- a/drivers/net/phy/fixed.c
+++ b/drivers/net/phy/fixed.c
@@ -30,53 +30,31 @@
 #include <linux/mii.h>
 #include <linux/ethtool.h>
 #include <linux/phy.h>
+#include <linux/phy_fixed.h>
 
 #include <asm/io.h>
 #include <asm/irq.h>
 #include <asm/uaccess.h>
 
-#define MII_REGS_NUM    7
-
-/*
-    The idea is to emulate normal phy behavior by responding with
-    pre-defined values to mii BMCR read, so that read_status hook could
-    take all the needed info.
-*/
-
-struct fixed_phy_status {
-        u8      link;
-        u16     speed;
-        u8      duplex;
-};
-
-/*-----------------------------------------------------------------------------
- *  Private information hoder for mii_bus
- *-----------------------------------------------------------------------------*/
-struct fixed_info {
-        u16 *regs;
-        u8 regs_num;
-        struct fixed_phy_status phy_status;
-        struct phy_device *phydev; /* pointer to the container */
-        /* link & speed cb */
-        int(*link_update)(struct net_device*, struct fixed_phy_status*);
-
-};
+/* we need to track the allocated pointers in order to free them on exit */
+static struct fixed_info *fixed_phy_ptrs[CONFIG_FIXED_MII_AMNT*MAX_PHY_AMNT];
 
 /*-----------------------------------------------------------------------------
  *  If something weird is required to be done with link/speed,
  * network driver is able to assign a function to implement this.
  * May be useful for PHY's that need to be software-driven.
  *-----------------------------------------------------------------------------*/
-int fixed_mdio_set_link_update(struct phy_device* phydev,
-                int(*link_update)(struct net_device*, struct fixed_phy_status*))
+int fixed_mdio_set_link_update(struct phy_device *phydev,
+                               int (*link_update) (struct net_device *,
+                                                   struct fixed_phy_status *))
 {
         struct fixed_info *fixed;
 
-        if(link_update == NULL)
+        if (link_update == NULL)
                 return -EINVAL;
 
-        if(phydev) {
-                if(phydev->bus) {
+        if (phydev) {
+                if (phydev->bus) {
                         fixed = phydev->bus->priv;
                         fixed->link_update = link_update;
                         return 0;
@@ -84,54 +62,64 @@ int fixed_mdio_set_link_update(struct phy_device* phydev,
         }
         return -EINVAL;
 }
+
 EXPORT_SYMBOL(fixed_mdio_set_link_update);
 
+struct fixed_info *fixed_mdio_get_phydev (int phydev_ind)
+{
+        if (phydev_ind >= MAX_PHY_AMNT)
+                return NULL;
+        return fixed_phy_ptrs[phydev_ind];
+}
+
+EXPORT_SYMBOL(fixed_mdio_get_phydev);
+
 /*-----------------------------------------------------------------------------
  *  This is used for updating internal mii regs from the status
  *-----------------------------------------------------------------------------*/
-#if defined(CONFIG_FIXED_MII_100_FDX) || defined(CONFIG_FIXED_MII_10_FDX)
+#if defined(CONFIG_FIXED_MII_100_FDX) || defined(CONFIG_FIXED_MII_10_FDX) || defined(CONFIG_FIXED_MII_1000_FDX)
 static int fixed_mdio_update_regs(struct fixed_info *fixed)
 {
         u16 *regs = fixed->regs;
         u16 bmsr = 0;
         u16 bmcr = 0;
 
-        if(!regs) {
+        if (!regs) {
                 printk(KERN_ERR "%s: regs not set up", __FUNCTION__);
                 return -EINVAL;
         }
 
-        if(fixed->phy_status.link)
+        if (fixed->phy_status.link)
                 bmsr |= BMSR_LSTATUS;
 
-        if(fixed->phy_status.duplex) {
+        if (fixed->phy_status.duplex) {
                 bmcr |= BMCR_FULLDPLX;
 
-                switch ( fixed->phy_status.speed ) {
+                switch (fixed->phy_status.speed) {
                 case 100:
                         bmsr |= BMSR_100FULL;
                         bmcr |= BMCR_SPEED100;
-                break;
+                        break;
 
                 case 10:
                         bmsr |= BMSR_10FULL;
-                break;
+                        break;
                 }
         } else {
-                switch ( fixed->phy_status.speed ) {
+                switch (fixed->phy_status.speed) {
                 case 100:
                         bmsr |= BMSR_100HALF;
                         bmcr |= BMCR_SPEED100;
-                break;
+                        break;
 
                 case 10:
                         bmsr |= BMSR_100HALF;
-                break;
+                        break;
                 }
         }
 
-        regs[MII_BMCR] =  bmcr;
-        regs[MII_BMSR] =  bmsr | 0x800; /*we are always capable of 10 hdx*/
+        regs[MII_BMCR] = bmcr;
+        regs[MII_BMSR] = bmsr | 0x800;  /*we are always capable of 10 hdx */
 
         return 0;
 }
@@ -141,29 +129,30 @@ static int fixed_mii_read(struct mii_bus *bus, int phy_id, int location)
         struct fixed_info *fixed = bus->priv;
 
         /* if user has registered link update callback, use it */
-        if(fixed->phydev)
-                if(fixed->phydev->attached_dev) {
-                        if(fixed->link_update) {
+        if (fixed->phydev)
+                if (fixed->phydev->attached_dev) {
+                        if (fixed->link_update) {
                                 fixed->link_update(fixed->phydev->attached_dev,
-                                                &fixed->phy_status);
+                                                   &fixed->phy_status);
                                 fixed_mdio_update_regs(fixed);
                         }
-        }
+                }
 
         if ((unsigned int)location >= fixed->regs_num)
                 return -1;
         return fixed->regs[location];
 }
 
-static int fixed_mii_write(struct mii_bus *bus, int phy_id, int location, u16 val)
+static int fixed_mii_write(struct mii_bus *bus, int phy_id, int location,
+                           u16 val)
 {
-        /* do nothing for now*/
+        /* do nothing for now */
         return 0;
 }
 
 static int fixed_mii_reset(struct mii_bus *bus)
 {
-        /*nothing here - no way/need to reset it*/
+        /*nothing here - no way/need to reset it */
         return 0;
 }
 #endif
@@ -171,8 +160,8 @@ static int fixed_mii_reset(struct mii_bus *bus)
 static int fixed_config_aneg(struct phy_device *phydev)
 {
         /* :TODO:03/13/2006 09:45:37 PM::
-         The full autoneg funcionality can be emulated,
-         but no need to have anything here for now
+           The full autoneg funcionality can be emulated,
+           but no need to have anything here for now
          */
         return 0;
 }
@@ -182,59 +171,79 @@ static int fixed_config_aneg(struct phy_device *phydev)
  * match will never return true...
  *-----------------------------------------------------------------------------*/
 static struct phy_driver fixed_mdio_driver = {
-        .name           = "Fixed PHY",
-        .features       = PHY_BASIC_FEATURES,
-        .config_aneg    = fixed_config_aneg,
-        .read_status    = genphy_read_status,
-        .driver         = { .owner = THIS_MODULE,},
+        .name = "Fixed PHY",
+#ifdef CONFIG_FIXED_MII_1000_FDX
+        .features = PHY_GBIT_FEATURES,
+#else
+        .features = PHY_BASIC_FEATURES,
+#endif
+        .config_aneg = fixed_config_aneg,
+        .read_status = genphy_read_status,
+        .driver = { .owner = THIS_MODULE, },
 };
 
+static void fixed_mdio_release(struct device *dev)
+{
+        struct phy_device *phydev = container_of(dev, struct phy_device, dev);
+        struct mii_bus *bus = phydev->bus;
+        struct fixed_info *fixed = bus->priv;
+
+        kfree(phydev);
+        kfree(bus->dev);
+        kfree(bus);
+        kfree(fixed->regs);
+        kfree(fixed);
+}
+
 /*-----------------------------------------------------------------------------
  *  This func is used to create all the necessary stuff, bind
  * the fixed phy driver and register all it on the mdio_bus_type.
- * speed is either 10 or 100, duplex is boolean.
+ * speed is either 10 or 100 or 1000, duplex is boolean.
  * number is used to create multiple fixed PHYs, so that several devices can
  * utilize them simultaneously.
+ *
+ * The device on mdio bus will look like [bus_id]:[phy_id],
+ * bus_id = number
+ * phy_id = speed+duplex.
  *-----------------------------------------------------------------------------*/
-#if defined(CONFIG_FIXED_MII_100_FDX) || defined(CONFIG_FIXED_MII_10_FDX)
-static int fixed_mdio_register_device(int number, int speed, int duplex)
+#if defined(CONFIG_FIXED_MII_100_FDX) || defined(CONFIG_FIXED_MII_10_FDX) || defined(CONFIG_FIXED_MII_1000_FDX)
+struct fixed_info *fixed_mdio_register_device(
+        int bus_id, int speed, int duplex, u8 phy_id)
 {
         struct mii_bus *new_bus;
         struct fixed_info *fixed;
         struct phy_device *phydev;
-        int err = 0;
+        int err;
 
-        struct device* dev = kzalloc(sizeof(struct device), GFP_KERNEL);
+        struct device *dev = kzalloc(sizeof(struct device), GFP_KERNEL);
 
-        if (NULL == dev)
-                return -ENOMEM;
+        if (dev == NULL)
+                goto err_dev_alloc;
 
         new_bus = kzalloc(sizeof(struct mii_bus), GFP_KERNEL);
 
-        if (NULL == new_bus) {
-                kfree(dev);
-                return -ENOMEM;
-        }
+        if (new_bus == NULL)
+                goto err_bus_alloc;
+
         fixed = kzalloc(sizeof(struct fixed_info), GFP_KERNEL);
 
-        if (NULL == fixed) {
-                kfree(dev);
-                kfree(new_bus);
-                return -ENOMEM;
-        }
+        if (fixed == NULL)
+                goto err_fixed_alloc;
+
+        fixed->regs = kzalloc(MII_REGS_NUM * sizeof(int), GFP_KERNEL);
+        if (NULL == fixed->regs)
+                goto err_fixed_regs_alloc;
 
-        fixed->regs = kzalloc(MII_REGS_NUM*sizeof(int), GFP_KERNEL);
         fixed->regs_num = MII_REGS_NUM;
         fixed->phy_status.speed = speed;
         fixed->phy_status.duplex = duplex;
         fixed->phy_status.link = 1;
 
-        new_bus->name = "Fixed MII Bus",
-        new_bus->read = &fixed_mii_read,
-        new_bus->write = &fixed_mii_write,
-        new_bus->reset = &fixed_mii_reset,
-
-        /*set up workspace*/
+        new_bus->name = "Fixed MII Bus";
+        new_bus->read = &fixed_mii_read;
+        new_bus->write = &fixed_mii_write;
+        new_bus->reset = &fixed_mii_reset;
+        /*set up workspace */
         fixed_mdio_update_regs(fixed);
         new_bus->priv = fixed;
 
@@ -243,119 +252,110 @@ static int fixed_mdio_register_device(int number, int speed, int duplex)
 
         /* create phy_device and register it on the mdio bus */
         phydev = phy_device_create(new_bus, 0, 0);
+        if (phydev == NULL)
+                goto err_phy_dev_create;
 
         /*
-         Put the phydev pointer into the fixed pack so that bus read/write code could
-         be able to access for instance attached netdev. Well it doesn't have to do
-         so, only in case of utilizing user-specified link-update...
+         * Put the phydev pointer into the fixed pack so that bus read/write
+         * code could be able to access for instance attached netdev. Well it
+         * doesn't have to do so, only in case of utilizing user-specified
+         * link-update...
          */
-        fixed->phydev = phydev;
 
-        if(NULL == phydev) {
-                err = -ENOMEM;
-                goto device_create_fail;
-        }
+        fixed->phydev = phydev;
+        phydev->speed = speed;
+        phydev->duplex = duplex;
 
         phydev->irq = PHY_IGNORE_INTERRUPT;
         phydev->dev.bus = &mdio_bus_type;
 
-        if(number)
-                snprintf(phydev->dev.bus_id, BUS_ID_SIZE,
-                                "fixed_%d@%d:%d", number, speed, duplex);
-        else
-                snprintf(phydev->dev.bus_id, BUS_ID_SIZE,
-                                "fixed@%d:%d", speed, duplex);
-        phydev->bus = new_bus;
+        snprintf(phydev->dev.bus_id, BUS_ID_SIZE,
+                 PHY_ID_FMT, bus_id, phy_id);
 
-        err = device_register(&phydev->dev);
-        if(err) {
-                printk(KERN_ERR "Phy %s failed to register\n",
-                                phydev->dev.bus_id);
-                goto bus_register_fail;
-        }
+        phydev->bus = new_bus;
 
-        /*
-           the mdio bus has phy_id match... In order not to do it
-           artificially, we are binding the driver here by hand;
-           it will be the same for all the fixed phys anyway.
-         */
         phydev->dev.driver = &fixed_mdio_driver.driver;
-
+        phydev->dev.release = fixed_mdio_release;
         err = phydev->dev.driver->probe(&phydev->dev);
-        if(err < 0) {
-                printk(KERN_ERR "Phy %s: problems with fixed driver\n",phydev->dev.bus_id);
-                goto probe_fail;
+        if (err < 0) {
+                printk(KERN_ERR "Phy %s: problems with fixed driver\n",
+                       phydev->dev.bus_id);
+                goto err_out;
         }
+        err = device_register(&phydev->dev);
+        if (err) {
+                printk(KERN_ERR "Phy %s failed to register\n",
+                       phydev->dev.bus_id);
+                goto err_out;
+        }
+        //phydev->state = PHY_RUNNING; /* make phy go up quick, but in 10Mbit/HDX
+        return fixed;
 
-        err = device_bind_driver(&phydev->dev);
-        if (err)
-                goto probe_fail;
-
-        return 0;
-
-probe_fail:
-        device_unregister(&phydev->dev);
-bus_register_fail:
+err_out:
         kfree(phydev);
-device_create_fail:
-        kfree(dev);
-        kfree(new_bus);
+err_phy_dev_create:
+        kfree(fixed->regs);
+err_fixed_regs_alloc:
         kfree(fixed);
+err_fixed_alloc:
+        kfree(new_bus);
+err_bus_alloc:
+        kfree(dev);
+err_dev_alloc:
+
+        return NULL;
 
-        return err;
 }
 #endif
 
-
 MODULE_DESCRIPTION("Fixed PHY device & driver for PAL");
 MODULE_AUTHOR("Vitaly Bordug");
 MODULE_LICENSE("GPL");
 
 static int __init fixed_init(void)
 {
-#if 0
-        int ret;
-        int duplex = 0;
-#endif
-
-        /* register on the bus... Not expected to be matched with anything there... */
+        int cnt = 0;
+        int i;
+/* register on the bus... Not expected to be matched
+ * with anything there...
+ *
+ */
         phy_driver_register(&fixed_mdio_driver);
 
-        /* So let the fun begin...
-           We will create several mdio devices here, and will bound the upper
-           driver to them.
-
-           Then the external software can lookup the phy bus by searching
-           fixed@speed:duplex, e.g. fixed@100:1, to be connected to the
-           virtual 100M Fdx phy.
-
-           In case several virtual PHYs required, the bus_id will be in form
-           fixed_<num>@<speed>:<duplex>, which make it able even to define
-           driver-specific link control callback, if for instance PHY is completely
-           SW-driven.
-
-        */
-
-#ifdef CONFIG_FIXED_MII_DUPLEX
-#if 0
-        duplex = 1;
-#endif
+/* We will create several mdio devices here, and will bound the upper
+ * driver to them.
+ *
+ * Then the external software can lookup the phy bus by searching
+ * for 0:101, to be connected to the virtual 100M Fdx phy.
+ *
+ * In case several virtual PHYs required, the bus_id will be in form
+ * [num]:[duplex]+[speed], which make it able even to define
+ * driver-specific link control callback, if for instance PHY is
+ * completely SW-driven.
+ */
+        for (i=1; i <= CONFIG_FIXED_MII_AMNT; i++) {
+#ifdef CONFIG_FIXED_MII_1000_FDX
+                fixed_phy_ptrs[cnt++] = fixed_mdio_register_device(0, 1000, 1, i);
 #endif
-
 #ifdef CONFIG_FIXED_MII_100_FDX
-        fixed_mdio_register_device(0, 100, 1);
+                fixed_phy_ptrs[cnt++] = fixed_mdio_register_device(1, 100, 1, i);
 #endif
-
 #ifdef CONFIG_FIXED_MII_10_FDX
-        fixed_mdio_register_device(0, 10, 1);
+                fixed_phy_ptrs[cnt++] = fixed_mdio_register_device(2, 10, 1, i);
 #endif
+        }
+
         return 0;
 }
 
 static void __exit fixed_exit(void)
 {
+        int i;
+
         phy_driver_unregister(&fixed_mdio_driver);
-        /* :WARNING:02/18/2006 04:32:40 AM:: Cleanup all the created stuff */
+        for (i=0; i < MAX_PHY_AMNT; i++)
+                if ( fixed_phy_ptrs[i] )
+                        device_unregister(&fixed_phy_ptrs[i]->phydev->dev);
 }
 
 module_init(fixed_init);