fec: add support for PHY interface platform data

The i.MX25 PDK uses RMII to communicate with its PHY. This patch adds
the ability to configure RMII, based on platform data.

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Acked-by:  Greg Ungerer <gerg@uclinux.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/fec.c b/drivers/net/fec.c
index 42d9ac9ba3958aa3b4b6a7210bb96cb51aa3dd52..326465ffbb2358c286e04b8e1e48fb56f700b765 100644 (file)
--- a/drivers/net/fec.c
+++ b/drivers/net/fec.c
@@ -41,6 +41,7 @@
 #include <linux/clk.h>
 #include <linux/platform_device.h>
 #include <linux/phy.h>
+#include <linux/fec.h>
 
 #include <asm/cacheflush.h>
 
@@ -182,6 +183,7 @@ struct fec_enet_private {
        struct  phy_device *phy_dev;
        int     mii_timeout;
        uint    phy_speed;
+       phy_interface_t phy_interface;
        int     index;
        int     link;
        int     full_duplex;
@@ -1191,6 +1193,21 @@ fec_restart(struct net_device *dev, int duplex)
        /* Set MII speed */
        writel(fep->phy_speed, fep->hwp + FEC_MII_SPEED);
 
+#ifdef FEC_MIIGSK_ENR
+       if (fep->phy_interface == PHY_INTERFACE_MODE_RMII) {
+               /* disable the gasket and wait */
+               writel(0, fep->hwp + FEC_MIIGSK_ENR);
+               while (readl(fep->hwp + FEC_MIIGSK_ENR) & 4)
+                       udelay(1);
+
+               /* configure the gasket: RMII, 50 MHz, no loopback, no echo */
+               writel(1, fep->hwp + FEC_MIIGSK_CFGR);
+
+               /* re-enable the gasket */
+               writel(2, fep->hwp + FEC_MIIGSK_ENR);
+       }
+#endif
+
        /* And last, enable the transmit and receive processing */
        writel(2, fep->hwp + FEC_ECNTRL);
        writel(0, fep->hwp + FEC_R_DES_ACTIVE);
@@ -1226,6 +1243,7 @@ static int __devinit
 fec_probe(struct platform_device *pdev)
 {
        struct fec_enet_private *fep;
+       struct fec_platform_data *pdata;
        struct net_device *ndev;
        int i, irq, ret = 0;
        struct resource *r;
@@ -1259,6 +1277,10 @@ fec_probe(struct platform_device *pdev)
 
        platform_set_drvdata(pdev, ndev);
 
+       pdata = pdev->dev.platform_data;
+       if (pdata)
+               fep->phy_interface = pdata->phy;
+
        /* This device has up to three irqs on some platforms */
        for (i = 0; i < 3; i++) {
                irq = platform_get_irq(pdev, i);

diff --git a/drivers/net/fec.h b/drivers/net/fec.h
index cc47f3f057c7464b2f5096e7810bad46c9362cf7..2c48b25668d56f7247707b8a8fadff476713ad22 100644 (file)
--- a/drivers/net/fec.h
+++ b/drivers/net/fec.h
@@ -43,6 +43,8 @@
 #define FEC_R_DES_START                0x180 /* Receive descriptor ring */
 #define FEC_X_DES_START                0x184 /* Transmit descriptor ring */
 #define FEC_R_BUFF_SIZE                0x188 /* Maximum receive buff size */
+#define FEC_MIIGSK_CFGR                0x300 /* MIIGSK Configuration reg */
+#define FEC_MIIGSK_ENR         0x308 /* MIIGSK Enable reg */
 
 #else
 

diff --git a/include/linux/fec.h b/include/linux/fec.h
new file mode 100644 (file)
index 0000000..5d3523d
--- /dev/null
+++ b/include/linux/fec.h
@@ -0,0 +1,21 @@
+/* include/linux/fec.h
+ *
+ * Copyright (c) 2009 Orex Computed Radiography
+ *   Baruch Siach <baruch@tkos.co.il>
+ *
+ * Header file for the FEC platform data
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef __LINUX_FEC_H__
+#define __LINUX_FEC_H__
+
+#include <linux/phy.h>
+
+struct fec_platform_data {
+       phy_interface_t phy;
+};
+
+#endif