netdev: bfin_mac: add Blackfin MII bus to platform bus to allow DSA access

When we register the MII bus to the platfrom bus, the Distributed Switch
Architecture can hook in transparently.

Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 84 insertions, 33 deletions

diff --git a/drivers/net/bfin_mac.c b/drivers/net/bfin_mac.c
index f0f1eb929dbb..955a46958b7f 100644
--- a/drivers/net/bfin_mac.c
+++ b/drivers/net/bfin_mac.c
@@ -971,7 +971,8 @@ static int __devinit bfin_mac_probe(struct platform_device *pdev)
 {
         struct net_device *ndev;
         struct bfin_mac_local *lp;
-        int rc, i;
+        struct platform_device *pd;
+        int rc;
 
         ndev = alloc_etherdev(sizeof(struct bfin_mac_local));
         if (!ndev) {
@@ -996,13 +997,6 @@ static int __devinit bfin_mac_probe(struct platform_device *pdev)
                 goto out_err_probe_mac;
         }
 
-        /* set the GPIO pins to Ethernet mode */
-        rc = peripheral_request_list(pin_req, DRV_NAME);
-        if (rc) {
-                dev_err(&pdev->dev, "Requesting peripherals failed!\n");
-                rc = -EFAULT;
-                goto out_err_setup_pin_mux;
-        }
 
         /*
          * Is it valid? (Did bootloader initialize it?)
@@ -1018,26 +1012,14 @@ static int __devinit bfin_mac_probe(struct platform_device *pdev)
 
         setup_mac_addr(ndev->dev_addr);
 
-        /* MDIO bus initial */
-        lp->mii_bus = mdiobus_alloc();
-        if (lp->mii_bus == NULL)
-                goto out_err_mdiobus_alloc;
-
-        lp->mii_bus->priv = ndev;
-        lp->mii_bus->read = bfin_mdiobus_read;
-        lp->mii_bus->write = bfin_mdiobus_write;
-        lp->mii_bus->reset = bfin_mdiobus_reset;
-        lp->mii_bus->name = "bfin_mac_mdio";
-        snprintf(lp->mii_bus->id, MII_BUS_ID_SIZE, "0");
-        lp->mii_bus->irq = kmalloc(sizeof(int)*PHY_MAX_ADDR, GFP_KERNEL);
-        for (i = 0; i < PHY_MAX_ADDR; ++i)
-                lp->mii_bus->irq[i] = PHY_POLL;
-
-        rc = mdiobus_register(lp->mii_bus);
-        if (rc) {
-                dev_err(&pdev->dev, "Cannot register MDIO bus!\n");
-                goto out_err_mdiobus_register;
+        if (!pdev->dev.platform_data) {
+                dev_err(&pdev->dev, "Cannot get platform device bfin_mii_bus!\n");
+                rc = -ENODEV;
+                goto out_err_probe_mac;
         }
+        pd = pdev->dev.platform_data;
+        lp->mii_bus = platform_get_drvdata(pd);
+        lp->mii_bus->priv = ndev;
 
         rc = mii_probe(ndev);
         if (rc) {
@@ -1079,11 +1061,8 @@ out_err_reg_ndev:
 out_err_request_irq:
 out_err_mii_probe:
         mdiobus_unregister(lp->mii_bus);
-out_err_mdiobus_register:
         mdiobus_free(lp->mii_bus);
-out_err_mdiobus_alloc:
         peripheral_free_list(pin_req);
-out_err_setup_pin_mux:
 out_err_probe_mac:
         platform_set_drvdata(pdev, NULL);
         free_netdev(ndev);
@@ -1098,8 +1077,7 @@ static int __devexit bfin_mac_remove(struct platform_device *pdev)
 
         platform_set_drvdata(pdev, NULL);
 
-        mdiobus_unregister(lp->mii_bus);
-        mdiobus_free(lp->mii_bus);
+        lp->mii_bus->priv = NULL;
 
         unregister_netdev(ndev);
 
@@ -1137,6 +1115,74 @@ static int bfin_mac_resume(struct platform_device *pdev)
 #define bfin_mac_resume NULL
 #endif  /* CONFIG_PM */
 
+static int __devinit bfin_mii_bus_probe(struct platform_device *pdev)
+{
+        struct mii_bus *miibus;
+        int rc, i;
+
+        /*
+         * We are setting up a network card,
+         * so set the GPIO pins to Ethernet mode
+         */
+        rc = peripheral_request_list(pin_req, DRV_NAME);
+        if (rc) {
+                dev_err(&pdev->dev, "Requesting peripherals failed!\n");
+                return rc;
+        }
+
+        rc = -ENOMEM;
+        miibus = mdiobus_alloc();
+        if (miibus == NULL)
+                goto out_err_alloc;
+        miibus->read = bfin_mdiobus_read;
+        miibus->write = bfin_mdiobus_write;
+        miibus->reset = bfin_mdiobus_reset;
+
+        miibus->parent = &pdev->dev;
+        miibus->name = "bfin_mii_bus";
+        snprintf(miibus->id, MII_BUS_ID_SIZE, "0");
+        miibus->irq = kmalloc(sizeof(int)*PHY_MAX_ADDR, GFP_KERNEL);
+        if (miibus->irq == NULL)
+                goto out_err_alloc;
+        for (i = 0; i < PHY_MAX_ADDR; ++i)
+                miibus->irq[i] = PHY_POLL;
+
+        rc = mdiobus_register(miibus);
+        if (rc) {
+                dev_err(&pdev->dev, "Cannot register MDIO bus!\n");
+                goto out_err_mdiobus_register;
+        }
+
+        platform_set_drvdata(pdev, miibus);
+        return 0;
+
+out_err_mdiobus_register:
+        mdiobus_free(miibus);
+out_err_alloc:
+        peripheral_free_list(pin_req);
+
+        return rc;
+}
+
+static int __devexit bfin_mii_bus_remove(struct platform_device *pdev)
+{
+        struct mii_bus *miibus = platform_get_drvdata(pdev);
+        platform_set_drvdata(pdev, NULL);
+        mdiobus_unregister(miibus);
+        mdiobus_free(miibus);
+        peripheral_free_list(pin_req);
+        return 0;
+}
+
+static struct platform_driver bfin_mii_bus_driver = {
+        .probe = bfin_mii_bus_probe,
+        .remove = __devexit_p(bfin_mii_bus_remove),
+        .driver = {
+                .name = "bfin_mii_bus",
+                .owner  = THIS_MODULE,
+        },
+};
+
 static struct platform_driver bfin_mac_driver = {
         .probe = bfin_mac_probe,
         .remove = __devexit_p(bfin_mac_remove),
@@ -1150,7 +1196,11 @@ static struct platform_driver bfin_mac_driver = {
 
 static int __init bfin_mac_init(void)
 {
-        return platform_driver_register(&bfin_mac_driver);
+        int ret;
+        ret = platform_driver_register(&bfin_mii_bus_driver);
+        if (!ret)
+                return platform_driver_register(&bfin_mac_driver);
+        return -ENODEV;
 }
 
 module_init(bfin_mac_init);
@@ -1158,6 +1208,7 @@ module_init(bfin_mac_init);
 static void __exit bfin_mac_cleanup(void)
 {
         platform_driver_unregister(&bfin_mac_driver);
+        platform_driver_unregister(&bfin_mii_bus_driver);
 }
 
 module_exit(bfin_mac_cleanup);