net: pch_gbe: Make 64 bit safe

The pch_gbe driver previously casted pointers to & from unsigned 32 bit
integers in many locations. This breaks the driver on 64 bit systems,
producing streams of compiler warnings about mismatched pointer &
integer sizes and then failing to keep track of addresses correctly at
runtime.

Fix the driver for 64 bit systems by using unsigned longs in place of
the previously used 32 bit integers.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>

drivers/net/pch_gbe.c

@@ -118,14 +118,14 @@ static void pch_gbe_rx_descs_init(struct udevice *dev)
 	memset(rx_desc, 0, sizeof(struct pch_gbe_rx_desc) * PCH_GBE_DESC_NUM);
 	for (i = 0; i < PCH_GBE_DESC_NUM; i++)
 		rx_desc->buffer_addr = dm_pci_phys_to_mem(priv->dev,
-			(u32)(priv->rx_buff[i]));
+			(ulong)(priv->rx_buff[i]));
 
-	writel(dm_pci_phys_to_mem(priv->dev, (u32)rx_desc),
+	writel(dm_pci_phys_to_mem(priv->dev, (ulong)rx_desc),
 	       &mac_regs->rx_dsc_base);
 	writel(sizeof(struct pch_gbe_rx_desc) * (PCH_GBE_DESC_NUM - 1),
 	       &mac_regs->rx_dsc_size);
 
-	writel(dm_pci_phys_to_mem(priv->dev, (u32)(rx_desc + 1)),
+	writel(dm_pci_phys_to_mem(priv->dev, (ulong)(rx_desc + 1)),
 	       &mac_regs->rx_dsc_sw_p);
 }
 
@@ -137,11 +137,11 @@ static void pch_gbe_tx_descs_init(struct udevice *dev)
 
 	memset(tx_desc, 0, sizeof(struct pch_gbe_tx_desc) * PCH_GBE_DESC_NUM);
 
-	writel(dm_pci_phys_to_mem(priv->dev, (u32)tx_desc),
+	writel(dm_pci_phys_to_mem(priv->dev, (ulong)tx_desc),
 	       &mac_regs->tx_dsc_base);
 	writel(sizeof(struct pch_gbe_tx_desc) * (PCH_GBE_DESC_NUM - 1),
 	       &mac_regs->tx_dsc_size);
-	writel(dm_pci_phys_to_mem(priv->dev, (u32)(tx_desc + 1)),
+	writel(dm_pci_phys_to_mem(priv->dev, (ulong)(tx_desc + 1)),
 	       &mac_regs->tx_dsc_sw_p);
 }
 
@@ -251,7 +251,7 @@ static int pch_gbe_send(struct udevice *dev, void *packet, int length)
 	if (length < 64)
 		frame_ctrl |= PCH_GBE_TXD_CTRL_APAD;
 
-	tx_desc->buffer_addr = dm_pci_phys_to_mem(priv->dev, (u32)packet);
+	tx_desc->buffer_addr = dm_pci_phys_to_mem(priv->dev, (ulong)packet);
 	tx_desc->length = length;
 	tx_desc->tx_words_eob = length + 3;
 	tx_desc->tx_frame_ctrl = frame_ctrl;
@@ -262,7 +262,7 @@ static int pch_gbe_send(struct udevice *dev, void *packet, int length)
 	if (++priv->tx_idx >= PCH_GBE_DESC_NUM)
 		priv->tx_idx = 0;
 
-	writel(dm_pci_phys_to_mem(priv->dev, (u32)(tx_head + priv->tx_idx)),
+	writel(dm_pci_phys_to_mem(priv->dev, (ulong)(tx_head + priv->tx_idx)),
 	       &mac_regs->tx_dsc_sw_p);
 
 	start = get_timer(0);
@@ -283,7 +283,7 @@ static int pch_gbe_recv(struct udevice *dev, int flags, uchar **packetp)
 	struct pch_gbe_priv *priv = dev_get_priv(dev);
 	struct pch_gbe_regs *mac_regs = priv->mac_regs;
 	struct pch_gbe_rx_desc *rx_desc;
-	u32 hw_desc, buffer_addr, length;
+	ulong hw_desc, buffer_addr, length;
 
 	rx_desc = &priv->rx_desc[priv->rx_idx];
 
@@ -291,7 +291,7 @@ static int pch_gbe_recv(struct udevice *dev, int flags, uchar **packetp)
 	hw_desc = readl(&mac_regs->rx_dsc_hw_p_hld);
 
 	/* Just return if not receiving any packet */
-	if ((u32)rx_desc == hw_desc)
+	if ((ulong)rx_desc == hw_desc)
 		return -EAGAIN;
 
 	buffer_addr = dm_pci_mem_to_phys(priv->dev, rx_desc->buffer_addr);
@@ -315,7 +315,7 @@ static int pch_gbe_free_pkt(struct udevice *dev, uchar *packet, int length)
 	if (++rx_swp >= PCH_GBE_DESC_NUM)
 		rx_swp = 0;
 
-	writel(dm_pci_phys_to_mem(priv->dev, (u32)(rx_head + rx_swp)),
+	writel(dm_pci_phys_to_mem(priv->dev, (ulong)(rx_head + rx_swp)),
 	       &mac_regs->rx_dsc_sw_p);
 
 	return 0;