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Date: Mon, 19 Apr 2010 00:12:21 +0200
From: Richard Röjfors
<richard.rojfors@...agicore.com>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net, bhutchings@...arflare.com
Subject: [PATCH] ks8842: Add platform data for setting mac address
This patch adds platform data to the ks8842 driver.
Via the platform data a MAC address, to be used by the controller,
can be passed.
To ensure this MAC address is used, the MAC address is written
after each hardware reset.
Signed-off-by: Richard Röjfors <richard.rojfors@...agicore.com>
---
diff --git a/drivers/net/ks8842.c b/drivers/net/ks8842.c
index 5c45cb5..423dd8d 100644
--- a/drivers/net/ks8842.c
+++ b/drivers/net/ks8842.c
@@ -1,5 +1,5 @@
/*
- * ks8842_main.c timberdale KS8842 ethernet driver
+ * ks8842.c timberdale KS8842 ethernet driver
* Copyright (c) 2009 Intel Corporation
*
* This program is free software; you can redistribute it and/or modify
@@ -26,6 +26,7 @@
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/ethtool.h>
+#include <linux/ks8842.h>
#define DRV_NAME "ks8842"
@@ -302,6 +303,20 @@ static void ks8842_read_mac_addr(struct ks8842_adapter *adapter, u8 *dest)
ks8842_write16(adapter, 39, mac, REG_MACAR3);
}
+static void ks8842_write_mac_addr(struct ks8842_adapter *adapter, u8 *mac)
+{
+ unsigned long flags;
+ unsigned i;
+
+ spin_lock_irqsave(&adapter->lock, flags);
+ for (i = 0; i < ETH_ALEN; i++) {
+ ks8842_write8(adapter, 2, mac[ETH_ALEN - i - 1], REG_MARL + i);
+ ks8842_write8(adapter, 39, mac[ETH_ALEN - i - 1],
+ REG_MACAR1 + i);
+ }
+ spin_unlock_irqrestore(&adapter->lock, flags);
+}
+
static inline u16 ks8842_tx_fifo_space(struct ks8842_adapter *adapter)
{
return ks8842_read16(adapter, 16, REG_TXMIR) & 0x1fff;
@@ -520,6 +535,8 @@ static int ks8842_open(struct net_device *netdev)
/* reset the HW */
ks8842_reset_hw(adapter);
+ ks8842_write_mac_addr(adapter, netdev->dev_addr);
+
ks8842_update_link_status(netdev, adapter);
err = request_irq(adapter->irq, ks8842_irq, IRQF_SHARED, DRV_NAME,
@@ -567,10 +584,8 @@ static netdev_tx_t ks8842_xmit_frame(struct sk_buff *skb,
static int ks8842_set_mac(struct net_device *netdev, void *p)
{
struct ks8842_adapter *adapter = netdev_priv(netdev);
- unsigned long flags;
struct sockaddr *addr = p;
char *mac = (u8 *)addr->sa_data;
- int i;
dev_dbg(&adapter->pdev->dev, "%s: entry\n", __func__);
@@ -579,13 +594,7 @@ static int ks8842_set_mac(struct net_device *netdev, void *p)
memcpy(netdev->dev_addr, mac, netdev->addr_len);
- spin_lock_irqsave(&adapter->lock, flags);
- for (i = 0; i < ETH_ALEN; i++) {
- ks8842_write8(adapter, 2, mac[ETH_ALEN - i - 1], REG_MARL + i);
- ks8842_write8(adapter, 39, mac[ETH_ALEN - i - 1],
- REG_MACAR1 + i);
- }
- spin_unlock_irqrestore(&adapter->lock, flags);
+ ks8842_write_mac_addr(adapter, mac);
return 0;
}
@@ -604,6 +613,8 @@ static void ks8842_tx_timeout(struct net_device *netdev)
ks8842_reset_hw(adapter);
+ ks8842_write_mac_addr(adapter, netdev->dev_addr);
+
ks8842_update_link_status(netdev, adapter);
}
@@ -626,7 +637,9 @@ static int __devinit ks8842_probe(struct platform_device *pdev)
struct resource *iomem;
struct net_device *netdev;
struct ks8842_adapter *adapter;
+ struct ks8842_platform_data *pdata = pdev->dev.platform_data;
u16 id;
+ unsigned i;
iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!request_mem_region(iomem->start, resource_size(iomem), DRV_NAME))
@@ -657,7 +670,25 @@ static int __devinit ks8842_probe(struct platform_device *pdev)
netdev->netdev_ops = &ks8842_netdev_ops;
netdev->ethtool_ops = &ks8842_ethtool_ops;
- ks8842_read_mac_addr(adapter, netdev->dev_addr);
+ /* Check if a mac address was given */
+ i = netdev->addr_len;
+ if (pdata) {
+ for (i = 0; i < netdev->addr_len; i++)
+ if (pdata->macaddr[i] != 0)
+ break;
+
+ if (i < netdev->addr_len)
+ /* an address was passed, use it */
+ memcpy(netdev->dev_addr, pdata->macaddr,
+ netdev->addr_len);
+ }
+
+ if (i == netdev->addr_len) {
+ ks8842_read_mac_addr(adapter, netdev->dev_addr);
+
+ if (!is_valid_ether_addr(netdev->dev_addr))
+ random_ether_addr(netdev->dev_addr);
+ }
id = ks8842_read16(adapter, 32, REG_SW_ID_AND_ENABLE);
diff --git a/include/linux/ks8842.h b/include/linux/ks8842.h
new file mode 100644
index 0000000..da0341b
--- /dev/null
+++ b/include/linux/ks8842.h
@@ -0,0 +1,34 @@
+/*
+ * ks8842.h KS8842 platform data struct definition
+ * Copyright (c) 2010 Intel Corporation
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef _LINUX_KS8842_H
+#define _LINUX_KS8842_H
+
+#include <linux/if_ether.h>
+
+/**
+ * struct ks8842_platform_data - Platform data of the KS8842 network driver
+ * @macaddr: The MAC address of the device, set to all 0:s to use the on in
+ * the chip.
+ *
+ */
+struct ks8842_platform_data {
+ u8 macaddr[ETH_ALEN];
+};
+
+#endif
--
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