AT91: MACB support

The Atmel MACB Ethernet peripheral is also integrated in the AT91SAM9260
and AT91SAM9263 processors.  The differences from the AVR32 version are:
      * Single peripheral clock.
      * MII/RMII selection bit is inverted.
      * Clock enable bit.

Original patch from Patrice Vilchez.

Signed-off-by: Andrew Victor <andrew@sanpeople.com>
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

3 files changed, 31 insertions, 4 deletions

diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index a005517a4184..ad92b6a76ee6 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -190,7 +190,7 @@ config MII
 
 config MACB
         tristate "Atmel MACB support"
-        depends on NET_ETHERNET && AVR32
+        depends on NET_ETHERNET && (AVR32 || ARCH_AT91SAM9260 || ARCH_AT91SAM9263)
         select MII
         help
           The Atmel MACB ethernet interface is found on many AT32 and AT91
diff --git a/drivers/net/macb.c b/drivers/net/macb.c
index 25b559b5d5ed..5eb7a3536f29 100644
--- a/drivers/net/macb.c
+++ b/drivers/net/macb.c
@@ -1046,6 +1046,14 @@ static int __devinit macb_probe(struct platform_device *pdev)
 
         spin_lock_init(&bp->lock);
 
+#if defined(CONFIG_ARCH_AT91)
+        bp->pclk = clk_get(&pdev->dev, "macb_clk");
+        if (IS_ERR(bp->pclk)) {
+                dev_err(&pdev->dev, "failed to get macb_clk\n");
+                goto err_out_free_dev;
+        }
+        clk_enable(bp->pclk);
+#else
         bp->pclk = clk_get(&pdev->dev, "pclk");
         if (IS_ERR(bp->pclk)) {
                 dev_err(&pdev->dev, "failed to get pclk\n");
@@ -1059,6 +1067,7 @@ static int __devinit macb_probe(struct platform_device *pdev)
 
         clk_enable(bp->pclk);
         clk_enable(bp->hclk);
+#endif
 
         bp->regs = ioremap(regs->start, regs->end - regs->start + 1);
         if (!bp->regs) {
@@ -1119,9 +1128,17 @@ static int __devinit macb_probe(struct platform_device *pdev)
 
         pdata = pdev->dev.platform_data;
         if (pdata && pdata->is_rmii)
+#if defined(CONFIG_ARCH_AT91)
+                macb_writel(bp, USRIO, (MACB_BIT(RMII) | MACB_BIT(CLKEN)) );
+#else
                 macb_writel(bp, USRIO, 0);
+#endif
         else
+#if defined(CONFIG_ARCH_AT91)
+                macb_writel(bp, USRIO, MACB_BIT(CLKEN));
+#else
                 macb_writel(bp, USRIO, MACB_BIT(MII));
+#endif
 
         bp->tx_pending = DEF_TX_RING_PENDING;
 
@@ -1148,9 +1165,11 @@ err_out_free_irq:
 err_out_iounmap:
         iounmap(bp->regs);
 err_out_disable_clocks:
+#ifndef CONFIG_ARCH_AT91
         clk_disable(bp->hclk);
-        clk_disable(bp->pclk);
         clk_put(bp->hclk);
+#endif
+        clk_disable(bp->pclk);
 err_out_put_pclk:
         clk_put(bp->pclk);
 err_out_free_dev:
@@ -1173,9 +1192,11 @@ static int __devexit macb_remove(struct platform_device *pdev)
                 unregister_netdev(dev);
                 free_irq(dev->irq, dev);
                 iounmap(bp->regs);
+#ifndef CONFIG_ARCH_AT91
                 clk_disable(bp->hclk);
-                clk_disable(bp->pclk);
                 clk_put(bp->hclk);
+#endif
+                clk_disable(bp->pclk);
                 clk_put(bp->pclk);
                 free_netdev(dev);
                 platform_set_drvdata(pdev, NULL);
diff --git a/drivers/net/macb.h b/drivers/net/macb.h
index 27bf0ae0f0bb..b3bb2182edd1 100644
--- a/drivers/net/macb.h
+++ b/drivers/net/macb.h
@@ -200,7 +200,7 @@
 #define MACB_SOF_OFFSET                         30
 #define MACB_SOF_SIZE                           2
 
-/* Bitfields in USRIO */
+/* Bitfields in USRIO (AVR32) */
 #define MACB_MII_OFFSET                         0
 #define MACB_MII_SIZE                           1
 #define MACB_EAM_OFFSET                         1
@@ -210,6 +210,12 @@
 #define MACB_TX_PAUSE_ZERO_OFFSET               3
 #define MACB_TX_PAUSE_ZERO_SIZE                 1
 
+/* Bitfields in USRIO (AT91) */
+#define MACB_RMII_OFFSET                        0
+#define MACB_RMII_SIZE                          1
+#define MACB_CLKEN_OFFSET                       1
+#define MACB_CLKEN_SIZE                         1
+
 /* Bitfields in WOL */
 #define MACB_IP_OFFSET                          0
 #define MACB_IP_SIZE                            16