net: ethernet: davinci_emac: add OF support

add OF support for the davinci_emac driver.

Signed-off-by: Heiko Schocher <hs@denx.de>
Acked-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Anatolij Gustschin <agust@denx.de>
Cc: netdev@vger.kernel.org
Cc: davinci-linux-open-source@linux.davincidsp.com
Cc: linux-arm-kernel@lists.infradead.org
Cc: devicetree-discuss@lists.ozlabs.org
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Sekhar Nori <nsekhar@ti.com>
Cc: Wolfgang Denk <wd@denx.de>
Cc: Anatoly Sivov <mm05@mail.ru>
Cc: David Miller <davem@davemloft.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/Documentation/devicetree/bindings/net/davinci_emac.txt b/Documentation/devicetree/bindings/net/davinci_emac.txt
new file mode 100644 (file)
index 0000000..48b259e
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/davinci_emac.txt
@@ -0,0 +1,41 @@
+* Texas Instruments Davinci EMAC
+
+This file provides information, what the device node
+for the davinci_emac interface contains.
+
+Required properties:
+- compatible: "ti,davinci-dm6467-emac";
+- reg: Offset and length of the register set for the device
+- ti,davinci-ctrl-reg-offset: offset to control register
+- ti,davinci-ctrl-mod-reg-offset: offset to control module register
+- ti,davinci-ctrl-ram-offset: offset to control module ram
+- ti,davinci-ctrl-ram-size: size of control module ram
+- ti,davinci-rmii-en: use RMII
+- ti,davinci-no-bd-ram: has the emac controller BD RAM
+- phy-handle: Contains a phandle to an Ethernet PHY.
+              if not, davinci_emac driver defaults to 100/FULL
+- interrupts: interrupt mapping for the davinci emac interrupts sources:
+              4 sources: <Receive Threshold Interrupt
+                         Receive Interrupt
+                         Transmit Interrupt
+                         Miscellaneous Interrupt>
+
+Optional properties:
+- local-mac-address : 6 bytes, mac address
+
+Example (enbw_cmc board):
+       eth0: emac@1e20000 {
+               compatible = "ti,davinci-dm6467-emac";
+               reg = <0x220000 0x4000>;
+               ti,davinci-ctrl-reg-offset = <0x3000>;
+               ti,davinci-ctrl-mod-reg-offset = <0x2000>;
+               ti,davinci-ctrl-ram-offset = <0>;
+               ti,davinci-ctrl-ram-size = <0x2000>;
+               local-mac-address = [ 00 00 00 00 00 00 ];
+               interrupts = <33
+                               34
+                               35
+                               36
+                               >;
+               interrupt-parent = <&intc>;
+       };

diff --git a/drivers/net/ethernet/ti/davinci_emac.c b/drivers/net/ethernet/ti/davinci_emac.c
index ab0bbb7..b298ab0 100644 (file)
--- a/drivers/net/ethernet/ti/davinci_emac.c
+++ b/drivers/net/ethernet/ti/davinci_emac.c
@@ -58,6 +58,12 @@
 #include <linux/io.h>
 #include <linux/uaccess.h>
 #include <linux/davinci_emac.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/of_net.h>
+
+#include <mach/mux.h>
 
 #include <asm/irq.h>
 #include <asm/page.h>
@@ -339,6 +345,9 @@ struct emac_priv {
        u32 rx_addr_type;
        atomic_t cur_tx;
        const char *phy_id;
+#ifdef CONFIG_OF
+       struct device_node *phy_node;
+#endif
        struct phy_device *phydev;
        spinlock_t lock;
        /*platform specific members*/
@@ -1760,6 +1769,77 @@ static const struct net_device_ops emac_netdev_ops = {
 #endif
 };
 
+#ifdef CONFIG_OF
+static struct emac_platform_data
+       *davinci_emac_of_get_pdata(struct platform_device *pdev,
+       struct emac_priv *priv)
+{
+       struct device_node *np;
+       struct emac_platform_data *pdata = NULL;
+       const u8 *mac_addr;
+       u32 data;
+       int ret;
+
+       pdata = pdev->dev.platform_data;
+       if (!pdata) {
+               pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
+               if (!pdata)
+                       goto nodata;
+       }
+
+       np = pdev->dev.of_node;
+       if (!np)
+               goto nodata;
+       else
+               pdata->version = EMAC_VERSION_2;
+
+       if (!is_valid_ether_addr(pdata->mac_addr)) {
+               mac_addr = of_get_mac_address(np);
+               if (mac_addr)
+                       memcpy(pdata->mac_addr, mac_addr, ETH_ALEN);
+       }
+
+       ret = of_property_read_u32(np, "ti,davinci-ctrl-reg-offset", &data);
+       if (!ret)
+               pdata->ctrl_reg_offset = data;
+
+       ret = of_property_read_u32(np, "ti,davinci-ctrl-mod-reg-offset",
+               &data);
+       if (!ret)
+               pdata->ctrl_mod_reg_offset = data;
+
+       ret = of_property_read_u32(np, "ti,davinci-ctrl-ram-offset", &data);
+       if (!ret)
+               pdata->ctrl_ram_offset = data;
+
+       ret = of_property_read_u32(np, "ti,davinci-ctrl-ram-size", &data);
+       if (!ret)
+               pdata->ctrl_ram_size = data;
+
+       ret = of_property_read_u32(np, "ti,davinci-rmii-en", &data);
+       if (!ret)
+               pdata->rmii_en = data;
+
+       ret = of_property_read_u32(np, "ti,davinci-no-bd-ram", &data);
+       if (!ret)
+               pdata->no_bd_ram = data;
+
+       priv->phy_node = of_parse_phandle(np, "phy-handle", 0);
+       if (!priv->phy_node)
+               pdata->phy_id = "";
+
+       pdev->dev.platform_data = pdata;
+nodata:
+       return  pdata;
+}
+#else
+static struct emac_platform_data
+       *davinci_emac_of_get_pdata(struct platform_device *pdev,
+       struct emac_priv *priv)
+{
+       return  pdev->dev.platform_data;
+}
+#endif
 /**
  * davinci_emac_probe - EMAC device probe
  * @pdev: The DaVinci EMAC device that we are removing
@@ -1802,7 +1882,7 @@ static int __devinit davinci_emac_probe(struct platform_device *pdev)
 
        spin_lock_init(&priv->lock);
 
-       pdata = pdev->dev.platform_data;
+       pdata = davinci_emac_of_get_pdata(pdev, priv);
        if (!pdata) {
                dev_err(&pdev->dev, "no platform data\n");
                rc = -ENODEV;
@@ -2013,12 +2093,19 @@ static const struct dev_pm_ops davinci_emac_pm_ops = {
        .resume         = davinci_emac_resume,
 };
 
+static const struct of_device_id davinci_emac_of_match[] = {
+       {.compatible = "ti,davinci-dm6467-emac", },
+       {},
+};
+MODULE_DEVICE_TABLE(of, davinci_emac_of_match);
+
 /* davinci_emac_driver: EMAC platform driver structure */
 static struct platform_driver davinci_emac_driver = {
        .driver = {
                .name    = "davinci_emac",
                .owner   = THIS_MODULE,
                .pm      = &davinci_emac_pm_ops,
+               .of_match_table = of_match_ptr(davinci_emac_of_match),
        },
        .probe = davinci_emac_probe,
        .remove = __devexit_p(davinci_emac_remove),