netdev: mdio-octeon.c: Convert to use device tree.

Get the MDIO bus controller addresses from the device tree, small
clean up in use of devm_*

Remove, now unused, platform device setup code.

Signed-off-by: David Daney <david.daney@cavium.com>
Acked-by: David S. Miller <davem@davemloft.net>
Cc: linux-mips@linux-mips.org
Cc: devicetree-discuss@lists.ozlabs.org
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Rob Herring <rob.herring@calxeda.com>
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/3938/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 58 insertions, 34 deletions

diff --git a/drivers/net/phy/mdio-octeon.c b/drivers/net/phy/mdio-octeon.c
index 826d961f39f7..d4015aa663e6 100644
--- a/drivers/net/phy/mdio-octeon.c
+++ b/drivers/net/phy/mdio-octeon.c
@@ -3,14 +3,17 @@
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  *
- * Copyright (C) 2009 Cavium Networks
+ * Copyright (C) 2009,2011 Cavium, Inc.
  */
 
-#include <linux/gfp.h>
-#include <linux/init.h>
-#include <linux/module.h>
 #include <linux/platform_device.h>
+#include <linux/of_mdio.h>
+#include <linux/delay.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/gfp.h>
 #include <linux/phy.h>
+#include <linux/io.h>
 
 #include <asm/octeon/octeon.h>
 #include <asm/octeon/cvmx-smix-defs.h>
@@ -18,9 +21,17 @@
 #define DRV_VERSION "1.0"
 #define DRV_DESCRIPTION "Cavium Networks Octeon SMI/MDIO driver"
 
+#define SMI_CMD         0x0
+#define SMI_WR_DAT      0x8
+#define SMI_RD_DAT      0x10
+#define SMI_CLK         0x18
+#define SMI_EN          0x20
+
 struct octeon_mdiobus {
         struct mii_bus *mii_bus;
-        int unit;
+        u64 register_base;
+        resource_size_t mdio_phys;
+        resource_size_t regsize;
         int phy_irq[PHY_MAX_ADDR];
 };
 
@@ -35,15 +46,15 @@ static int octeon_mdiobus_read(struct mii_bus *bus, int phy_id, int regnum)
         smi_cmd.s.phy_op = 1; /* MDIO_CLAUSE_22_READ */
         smi_cmd.s.phy_adr = phy_id;
         smi_cmd.s.reg_adr = regnum;
-        cvmx_write_csr(CVMX_SMIX_CMD(p->unit), smi_cmd.u64);
+        cvmx_write_csr(p->register_base + SMI_CMD, smi_cmd.u64);
 
         do {
                 /*
                  * Wait 1000 clocks so we don't saturate the RSL bus
                  * doing reads.
                  */
-                cvmx_wait(1000);
-                smi_rd.u64 = cvmx_read_csr(CVMX_SMIX_RD_DAT(p->unit));
+                __delay(1000);
+                smi_rd.u64 = cvmx_read_csr(p->register_base + SMI_RD_DAT);
         } while (smi_rd.s.pending && --timeout);
 
         if (smi_rd.s.val)
@@ -62,21 +73,21 @@ static int octeon_mdiobus_write(struct mii_bus *bus, int phy_id,
 
         smi_wr.u64 = 0;
         smi_wr.s.dat = val;
-        cvmx_write_csr(CVMX_SMIX_WR_DAT(p->unit), smi_wr.u64);
+        cvmx_write_csr(p->register_base + SMI_WR_DAT, smi_wr.u64);
 
         smi_cmd.u64 = 0;
         smi_cmd.s.phy_op = 0; /* MDIO_CLAUSE_22_WRITE */
         smi_cmd.s.phy_adr = phy_id;
         smi_cmd.s.reg_adr = regnum;
-        cvmx_write_csr(CVMX_SMIX_CMD(p->unit), smi_cmd.u64);
+        cvmx_write_csr(p->register_base + SMI_CMD, smi_cmd.u64);
 
         do {
                 /*
                  * Wait 1000 clocks so we don't saturate the RSL bus
                  * doing reads.
                  */
-                cvmx_wait(1000);
-                smi_wr.u64 = cvmx_read_csr(CVMX_SMIX_WR_DAT(p->unit));
+                __delay(1000);
+                smi_wr.u64 = cvmx_read_csr(p->register_base + SMI_WR_DAT);
         } while (smi_wr.s.pending && --timeout);
 
         if (timeout <= 0)
@@ -88,38 +99,44 @@ static int octeon_mdiobus_write(struct mii_bus *bus, int phy_id,
 static int __devinit octeon_mdiobus_probe(struct platform_device *pdev)
 {
         struct octeon_mdiobus *bus;
+        struct resource *res_mem;
         union cvmx_smix_en smi_en;
-        int i;
         int err = -ENOENT;
 
         bus = devm_kzalloc(&pdev->dev, sizeof(*bus), GFP_KERNEL);
         if (!bus)
                 return -ENOMEM;
 
-        /* The platform_device id is our unit number.  */
-        bus->unit = pdev->id;
+        res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+
+        if (res_mem == NULL) {
+                dev_err(&pdev->dev, "found no memory resource\n");
+                err = -ENXIO;
+                goto fail;
+        }
+        bus->mdio_phys = res_mem->start;
+        bus->regsize = resource_size(res_mem);
+        if (!devm_request_mem_region(&pdev->dev, bus->mdio_phys, bus->regsize,
+                                     res_mem->name)) {
+                dev_err(&pdev->dev, "request_mem_region failed\n");
+                goto fail;
+        }
+        bus->register_base =
+                (u64)devm_ioremap(&pdev->dev, bus->mdio_phys, bus->regsize);
 
         bus->mii_bus = mdiobus_alloc();
 
         if (!bus->mii_bus)
-                goto err;
+                goto fail;
 
         smi_en.u64 = 0;
         smi_en.s.en = 1;
-        cvmx_write_csr(CVMX_SMIX_EN(bus->unit), smi_en.u64);
-
-        /*
-         * Standard Octeon evaluation boards don't support phy
-         * interrupts, we need to poll.
-         */
-        for (i = 0; i < PHY_MAX_ADDR; i++)
-                bus->phy_irq[i] = PHY_POLL;
+        cvmx_write_csr(bus->register_base + SMI_EN, smi_en.u64);
 
         bus->mii_bus->priv = bus;
         bus->mii_bus->irq = bus->phy_irq;
         bus->mii_bus->name = "mdio-octeon";
-        snprintf(bus->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x",
-                bus->mii_bus->name, bus->unit);
+        snprintf(bus->mii_bus->id, MII_BUS_ID_SIZE, "%llx", bus->register_base);
         bus->mii_bus->parent = &pdev->dev;
 
         bus->mii_bus->read = octeon_mdiobus_read;
@@ -127,20 +144,18 @@ static int __devinit octeon_mdiobus_probe(struct platform_device *pdev)
 
         dev_set_drvdata(&pdev->dev, bus);
 
-        err = mdiobus_register(bus->mii_bus);
+        err = of_mdiobus_register(bus->mii_bus, pdev->dev.of_node);
         if (err)
-                goto err_register;
+                goto fail_register;
 
         dev_info(&pdev->dev, "Version " DRV_VERSION "\n");
 
         return 0;
-err_register:
+fail_register:
         mdiobus_free(bus->mii_bus);
-
-err:
-        devm_kfree(&pdev->dev, bus);
+fail:
         smi_en.u64 = 0;
-        cvmx_write_csr(CVMX_SMIX_EN(bus->unit), smi_en.u64);
+        cvmx_write_csr(bus->register_base + SMI_EN, smi_en.u64);
         return err;
 }
 
@@ -154,14 +169,23 @@ static int __devexit octeon_mdiobus_remove(struct platform_device *pdev)
         mdiobus_unregister(bus->mii_bus);
         mdiobus_free(bus->mii_bus);
         smi_en.u64 = 0;
-        cvmx_write_csr(CVMX_SMIX_EN(bus->unit), smi_en.u64);
+        cvmx_write_csr(bus->register_base + SMI_EN, smi_en.u64);
         return 0;
 }
 
+static struct of_device_id octeon_mdiobus_match[] = {
+        {
+                .compatible = "cavium,octeon-3860-mdio",
+        },
+        {},
+};
+MODULE_DEVICE_TABLE(of, octeon_mdiobus_match);
+
 static struct platform_driver octeon_mdiobus_driver = {
         .driver = {
                 .name           = "mdio-octeon",
                 .owner          = THIS_MODULE,
+                .of_match_table = octeon_mdiobus_match,
         },
         .probe          = octeon_mdiobus_probe,
         .remove         = __devexit_p(octeon_mdiobus_remove),