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Date: Wed, 7 Nov 2012 19:14:57 +0100
From: Joachim Eastwood <manabian@...il.com>
To: nicolas.ferre@...el.com, davem@...emloft.net
Cc: plagnioj@...osoft.com, netdev@...r.kernel.org,
Joachim Eastwood <manabian@...il.com>
Subject: [PATCH 8/8] net/at91_ether: fix comment and style issues
Signed-off-by: Joachim Eastwood <manabian@...il.com>
---
drivers/net/ethernet/cadence/at91_ether.c | 111 ++++++++++++++----------------
1 file changed, 51 insertions(+), 60 deletions(-)
diff --git a/drivers/net/ethernet/cadence/at91_ether.c b/drivers/net/ethernet/cadence/at91_ether.c
index cf0cf06..e7a476c 100644
--- a/drivers/net/ethernet/cadence/at91_ether.c
+++ b/drivers/net/ethernet/cadence/at91_ether.c
@@ -6,11 +6,6 @@
* Based on an earlier Atmel EMAC macrocell driver by Atmel and Lineo Inc.
* Initial version by Rick Bronson 01/11/2003
*
- * Intel LXT971A PHY support by Christopher Bahns & David Knickerbocker
- * (Polaroid Corporation)
- *
- * Realtek RTL8201(B)L PHY support by Roman Avramenko <roman@...ystems.ru>
- *
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
@@ -38,22 +33,17 @@
#include "macb.h"
-#define DRV_NAME "at91_ether"
-#define DRV_VERSION "1.0"
-
/* 1518 rounded up */
#define MAX_RBUFF_SZ 0x600
/* max number of receive buffers */
#define MAX_RX_DESCR 9
-/*
- * Initialize and start the Receiver and Transmit subsystems
- */
+/* Initialize and start the Receiver and Transmit subsystems */
static int at91ether_start(struct net_device *dev)
{
struct macb *lp = netdev_priv(dev);
- unsigned long ctl;
dma_addr_t addr;
+ u32 ctl;
int i;
lp->rx_ring = dma_alloc_coherent(&lp->pdev->dev,
@@ -100,13 +90,11 @@ static int at91ether_start(struct net_device *dev)
return 0;
}
-/*
- * Open the ethernet interface
- */
+/* Open the ethernet interface */
static int at91ether_open(struct net_device *dev)
{
struct macb *lp = netdev_priv(dev);
- unsigned long ctl;
+ u32 ctl;
int ret;
if (!is_valid_ether_addr(dev->dev_addr))
@@ -123,9 +111,13 @@ static int at91ether_open(struct net_device *dev)
return ret;
/* Enable MAC interrupts */
- macb_writel(lp, IER, MACB_BIT(RCOMP) | MACB_BIT(RXUBR)
- | MACB_BIT(ISR_TUND) | MACB_BIT(ISR_RLE) | MACB_BIT(TCOMP)
- | MACB_BIT(ISR_ROVR) | MACB_BIT(HRESP));
+ macb_writel(lp, IER, MACB_BIT(RCOMP) |
+ MACB_BIT(RXUBR) |
+ MACB_BIT(ISR_TUND) |
+ MACB_BIT(ISR_RLE) |
+ MACB_BIT(TCOMP) |
+ MACB_BIT(ISR_ROVR) |
+ MACB_BIT(HRESP));
/* schedule a link state check */
phy_start(lp->phy_dev);
@@ -135,23 +127,24 @@ static int at91ether_open(struct net_device *dev)
return 0;
}
-/*
- * Close the interface
- */
+/* Close the interface */
static int at91ether_close(struct net_device *dev)
{
struct macb *lp = netdev_priv(dev);
- unsigned long ctl;
+ u32 ctl;
/* Disable Receiver and Transmitter */
ctl = macb_readl(lp, NCR);
macb_writel(lp, NCR, ctl & ~(MACB_BIT(TE) | MACB_BIT(RE)));
/* Disable MAC interrupts */
- macb_writel(lp, IDR, MACB_BIT(RCOMP) | MACB_BIT(RXUBR)
- | MACB_BIT(ISR_TUND) | MACB_BIT(ISR_RLE)
- | MACB_BIT(TCOMP) | MACB_BIT(ISR_ROVR)
- | MACB_BIT(HRESP));
+ macb_writel(lp, IDR, MACB_BIT(RCOMP) |
+ MACB_BIT(RXUBR) |
+ MACB_BIT(ISR_TUND) |
+ MACB_BIT(ISR_RLE) |
+ MACB_BIT(TCOMP) |
+ MACB_BIT(ISR_ROVR) |
+ MACB_BIT(HRESP));
netif_stop_queue(dev);
@@ -168,9 +161,7 @@ static int at91ether_close(struct net_device *dev)
return 0;
}
-/*
- * Transmit packet.
- */
+/* Transmit packet */
static int at91ether_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct macb *lp = netdev_priv(dev);
@@ -181,7 +172,8 @@ static int at91ether_start_xmit(struct sk_buff *skb, struct net_device *dev)
/* Store packet information (to free when Tx completed) */
lp->skb = skb;
lp->skb_length = skb->len;
- lp->skb_physaddr = dma_map_single(NULL, skb->data, skb->len, DMA_TO_DEVICE);
+ lp->skb_physaddr = dma_map_single(NULL, skb->data, skb->len,
+ DMA_TO_DEVICE);
/* Set address of the data in the Transmit Address register */
macb_writel(lp, TAR, lp->skb_physaddr);
@@ -190,16 +182,13 @@ static int at91ether_start_xmit(struct sk_buff *skb, struct net_device *dev)
} else {
netdev_err(dev, "%s called, but device is busy!\n", __func__);
- return NETDEV_TX_BUSY; /* if we return anything but zero, dev.c:1055 calls kfree_skb(skb)
- on this skb, he also reports -ENETDOWN and printk's, so either
- we free and return(0) or don't free and return 1 */
+ return NETDEV_TX_BUSY;
}
return NETDEV_TX_OK;
}
-/*
- * Extract received frame from buffer descriptors and sent to upper layers.
+/* Extract received frame from buffer descriptors and sent to upper layers.
* (Called from interrupt context)
*/
static void at91ether_rx(struct net_device *dev)
@@ -240,24 +229,25 @@ static void at91ether_rx(struct net_device *dev)
}
}
-/*
- * MAC interrupt handler
- */
+/* MAC interrupt handler */
static irqreturn_t at91ether_interrupt(int irq, void *dev_id)
{
- struct net_device *dev = (struct net_device *) dev_id;
+ struct net_device *dev = dev_id;
struct macb *lp = netdev_priv(dev);
- unsigned long intstatus, ctl;
+ u32 intstatus, ctl;
/* MAC Interrupt Status register indicates what interrupts are pending.
- It is automatically cleared once read. */
+ * It is automatically cleared once read.
+ */
intstatus = macb_readl(lp, ISR);
- if (intstatus & MACB_BIT(RCOMP)) /* Receive complete */
+ /* Receive complete */
+ if (intstatus & MACB_BIT(RCOMP))
at91ether_rx(dev);
- if (intstatus & MACB_BIT(TCOMP)) { /* Transmit complete */
- /* The TCOM bit is set even if the transmission failed. */
+ /* Transmit complete */
+ if (intstatus & MACB_BIT(TCOMP)) {
+ /* The TCOM bit is set even if the transmission failed */
if (intstatus & (MACB_BIT(ISR_TUND) | MACB_BIT(ISR_RLE)))
lp->stats.tx_errors++;
@@ -271,7 +261,7 @@ static irqreturn_t at91ether_interrupt(int irq, void *dev_id)
netif_wake_queue(dev);
}
- /* Work-around for Errata #11 */
+ /* Work-around for EMAC Errata section 41.3.1 */
if (intstatus & MACB_BIT(RXUBR)) {
ctl = macb_readl(lp, NCR);
macb_writel(lp, NCR, ctl & ~MACB_BIT(RE));
@@ -354,18 +344,17 @@ static int at91ether_get_hwaddr_dt(struct macb *bp)
}
#endif
-/*
- * Detect MAC & PHY and perform ethernet interface initialization
- */
+/* Detect MAC & PHY and perform ethernet interface initialization */
static int __init at91ether_probe(struct platform_device *pdev)
{
struct macb_platform_data *board_data = pdev->dev.platform_data;
struct resource *regs;
struct net_device *dev;
struct phy_device *phydev;
+ struct pinctrl *pinctrl;
struct macb *lp;
int res;
- struct pinctrl *pinctrl;
+ u32 reg;
regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!regs)
@@ -389,7 +378,8 @@ static int __init at91ether_probe(struct platform_device *pdev)
lp->dev = dev;
spin_lock_init(&lp->lock);
- dev->base_addr = regs->start; /* physical base address */
+ /* physical base address */
+ dev->base_addr = regs->start;
lp->regs = devm_ioremap(&pdev->dev, regs->start, resource_size(regs));
if (!lp->regs) {
res = -ENOMEM;
@@ -432,10 +422,11 @@ static int __init at91ether_probe(struct platform_device *pdev)
macb_writel(lp, NCR, 0);
+ reg = MACB_BF(CLK, MACB_CLK_DIV32) | MACB_BIT(BIG);
if (lp->phy_interface == PHY_INTERFACE_MODE_RMII)
- macb_writel(lp, NCFGR, MACB_BF(CLK, MACB_CLK_DIV32) | MACB_BIT(BIG) | MACB_BIT(RM9200_RMII));
- else
- macb_writel(lp, NCFGR, MACB_BF(CLK, MACB_CLK_DIV32) | MACB_BIT(BIG));
+ reg |= MACB_BIT(RM9200_RMII);
+
+ macb_writel(lp, NCFGR, reg);
/* Register the network interface */
res = register_netdev(dev);
@@ -445,11 +436,13 @@ static int __init at91ether_probe(struct platform_device *pdev)
if (macb_mii_init(lp) != 0)
goto err_out_unregister_netdev;
- netif_carrier_off(dev); /* will be enabled in open() */
+ /* will be enabled in open() */
+ netif_carrier_off(dev);
phydev = lp->phy_dev;
netdev_info(dev, "attached PHY driver [%s] (mii_bus:phy_addr=%s, irq=%d)\n",
- phydev->drv->name, dev_name(&phydev->dev), phydev->irq);
+ phydev->drv->name, dev_name(&phydev->dev),
+ phydev->irq);
/* Display ethernet banner */
netdev_info(dev, "AT91 ethernet at 0x%08lx int=%d (%pM)\n",
@@ -486,7 +479,6 @@ static int __devexit at91ether_remove(struct platform_device *pdev)
}
#ifdef CONFIG_PM
-
static int at91ether_suspend(struct platform_device *pdev, pm_message_t mesg)
{
struct net_device *net_dev = platform_get_drvdata(pdev);
@@ -514,7 +506,6 @@ static int at91ether_resume(struct platform_device *pdev)
}
return 0;
}
-
#else
#define at91ether_suspend NULL
#define at91ether_resume NULL
@@ -525,7 +516,7 @@ static struct platform_driver at91ether_driver = {
.suspend = at91ether_suspend,
.resume = at91ether_resume,
.driver = {
- .name = DRV_NAME,
+ .name = "at91_ether",
.owner = THIS_MODULE,
.of_match_table = of_match_ptr(at91ether_dt_ids),
},
@@ -547,4 +538,4 @@ module_exit(at91ether_exit)
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("AT91RM9200 EMAC Ethernet driver");
MODULE_AUTHOR("Andrew Victor");
-MODULE_ALIAS("platform:" DRV_NAME);
+MODULE_ALIAS("platform:at91_ether");
--
1.8.0
--
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