Merge branch 'bgmac-fixes'

Jon Mason says:

====================
net: ethernet: bgmac: bug fixes

Changes in v5:
* Rebased to the latest code and fixed up a compile error due to the
  mac_addr struct going away (found by David Miller)

Changes in v4:
* Added the udelays from the previous code (per David Miller)

Changes in v3:
* Reworked the init sequence patch to only remove the device reset if
  the device is actually in reset.  Given that this code doesn't bear
  much resemblance to the original code, I'm changing the author of the
  patch.  This was tested on NS2 SVK.

Changes in v2:
* Reworked the first match to make it more obvious what portions of the
  register were being preserved (Per Rafal Mileki)
* Style change to reorder the function variables in patch 2 (per Sergei
  Shtylyov)

Bug fixes for bgmac driver
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

Author: davem330

drivers/net/ethernet/broadcom/bgmac-platform.c

@@ -51,8 +51,7 @@ static void platform_bgmac_idm_write(struct bgmac *bgmac, u16 offset, u32 value)
 
 static bool platform_bgmac_clk_enabled(struct bgmac *bgmac)
 {
-	if ((bgmac_idm_read(bgmac, BCMA_IOCTL) &
-	     (BCMA_IOCTL_CLK | BCMA_IOCTL_FGC)) != BCMA_IOCTL_CLK)
+	if ((bgmac_idm_read(bgmac, BCMA_IOCTL) & BGMAC_CLK_EN) != BGMAC_CLK_EN)
 		return false;
 	if (bgmac_idm_read(bgmac, BCMA_RESET_CTL) & BCMA_RESET_CTL_RESET)
 		return false;
@@ -61,15 +60,25 @@ static bool platform_bgmac_clk_enabled(struct bgmac *bgmac)
 
 static void platform_bgmac_clk_enable(struct bgmac *bgmac, u32 flags)
 {
-	bgmac_idm_write(bgmac, BCMA_IOCTL,
-			(BCMA_IOCTL_CLK | BCMA_IOCTL_FGC | flags));
-	bgmac_idm_read(bgmac, BCMA_IOCTL);
+	u32 val;
 
-	bgmac_idm_write(bgmac, BCMA_RESET_CTL, 0);
-	bgmac_idm_read(bgmac, BCMA_RESET_CTL);
-	udelay(1);
+	/* The Reset Control register only contains a single bit to show if the
+	 * controller is currently in reset.  Do a sanity check here, just in
+	 * case the bootloader happened to leave the device in reset.
+	 */
+	val = bgmac_idm_read(bgmac, BCMA_RESET_CTL);
+	if (val) {
+		bgmac_idm_write(bgmac, BCMA_RESET_CTL, 0);
+		bgmac_idm_read(bgmac, BCMA_RESET_CTL);
+		udelay(1);
+	}
 
-	bgmac_idm_write(bgmac, BCMA_IOCTL, (BCMA_IOCTL_CLK | flags));
+	val = bgmac_idm_read(bgmac, BCMA_IOCTL);
+	/* Some bits of BCMA_IOCTL set by HW/ATF and should not change */
+	val |= flags & ~(BGMAC_AWCACHE | BGMAC_ARCACHE | BGMAC_AWUSER |
+			 BGMAC_ARUSER);
+	val |= BGMAC_CLK_EN;
+	bgmac_idm_write(bgmac, BCMA_IOCTL, val);
 	bgmac_idm_read(bgmac, BCMA_IOCTL);
 	udelay(1);
 }

drivers/net/ethernet/broadcom/bgmac.c

@@ -1223,12 +1223,16 @@ static netdev_tx_t bgmac_start_xmit(struct sk_buff *skb,
 static int bgmac_set_mac_address(struct net_device *net_dev, void *addr)
 {
 	struct bgmac *bgmac = netdev_priv(net_dev);
+	struct sockaddr *sa = addr;
 	int ret;
 
 	ret = eth_prepare_mac_addr_change(net_dev, addr);
 	if (ret < 0)
 		return ret;
-	bgmac_write_mac_address(bgmac, (u8 *)addr);
+
+	ether_addr_copy(net_dev->dev_addr, sa->sa_data);
+	bgmac_write_mac_address(bgmac, net_dev->dev_addr);
+
 	eth_commit_mac_addr_change(net_dev, addr);
 	return 0;
 }

drivers/net/ethernet/broadcom/bgmac.h

@@ -213,6 +213,22 @@
 /* BCMA GMAC core specific IO Control (BCMA_IOCTL) flags */
 #define BGMAC_BCMA_IOCTL_SW_CLKEN		0x00000004	/* PHY Clock Enable */
 #define BGMAC_BCMA_IOCTL_SW_RESET		0x00000008	/* PHY Reset */
+/* The IOCTL values appear to be different in NS, NSP, and NS2, and do not match
+ * the values directly above
+ */
+#define BGMAC_CLK_EN				BIT(0)
+#define BGMAC_RESERVED_0			BIT(1)
+#define BGMAC_SOURCE_SYNC_MODE_EN		BIT(2)
+#define BGMAC_DEST_SYNC_MODE_EN			BIT(3)
+#define BGMAC_TX_CLK_OUT_INVERT_EN		BIT(4)
+#define BGMAC_DIRECT_GMII_MODE			BIT(5)
+#define BGMAC_CLK_250_SEL			BIT(6)
+#define BGMAC_AWCACHE				(0xf << 7)
+#define BGMAC_RESERVED_1			(0x1f << 11)
+#define BGMAC_ARCACHE				(0xf << 16)
+#define BGMAC_AWUSER				(0x3f << 20)
+#define BGMAC_ARUSER				(0x3f << 26)
+#define BGMAC_RESERVED				BIT(31)
 
 /* BCMA GMAC core specific IO status (BCMA_IOST) flags */
 #define BGMAC_BCMA_IOST_ATTACHED		0x00000800