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SubjectRE: [PATCH] ep93xx_eth.c: general cleanup
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General cleanup of the ep93xx_eth driver.

1) Use pr_fmt() to prefix the module name and __func__ to the error
messages.
2) <linux/io.h> instead of <asm/io.h>
3) <mach/hardware.h> instead of <mach/ep93xx-regs.h> and <mach/platform.h>
4) Move the ep93xx_mdio_read (and ep93xx_mdio_write) function to eliminate
the function prototype.
5) Change all the printk(<level> messages to pr_<level> and remove the
__func__ argument.
6) Use platform_get_{resource/irq} to get the platform resources and add
an error check.
7) Use resource_size() for request_mem_region() and ioremap().
8) Use %pM to print the MAC address at the end of the probe.
9) Use dev->dev_addr not data->dev_addr for the MAC argument because a
random address could be used if the platform does not supply one.
The message at the end of the probe is left as a printk since it displays
cleaner without the function name that would be displayed with pr_info().

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Lennert Buytenhek <kernel@wantstofly.org>
Cc: David S. Miller <davem@davemloft.net>
Cc: Joe Perches <joe@perches.com>

---
V2 - Missed the resource check and resource_size()
V3 - Change pr_fmt() as suggested by Joe Perches
Don't remove DRV_MODULE_NAME and DRV_MODULE_VERSION
Don't remove the message in ep93xx_eth_init_module()
platform_get_irq returns an int not a resource *

diff --git a/drivers/net/arm/ep93xx_eth.c b/drivers/net/arm/ep93xx_eth.c
index b25467a..bf72d57 100644
--- a/drivers/net/arm/ep93xx_eth.c
+++ b/drivers/net/arm/ep93xx_eth.c
@@ -9,6 +9,8 @@
* (at your option) any later version.
*/

+#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
+
#include <linux/dma-mapping.h>
#include <linux/module.h>
#include <linux/kernel.h>
@@ -20,9 +22,9 @@
#include <linux/moduleparam.h>
#include <linux/platform_device.h>
#include <linux/delay.h>
-#include <mach/ep93xx-regs.h>
-#include <mach/platform.h>
-#include <asm/io.h>
+#include <linux/io.h>
+
+#include <mach/hardware.h>

#define DRV_MODULE_NAME "ep93xx-eth"
#define DRV_MODULE_VERSION "0.1"
@@ -185,7 +187,47 @@ struct ep93xx_priv
#define wrw(ep, off, val) __raw_writew((val), (ep)->base_addr + (off))
#define wrl(ep, off, val) __raw_writel((val), (ep)->base_addr + (off))

-static int ep93xx_mdio_read(struct net_device *dev, int phy_id, int reg);
+static int ep93xx_mdio_read(struct net_device *dev, int phy_id, int reg)
+{
+ struct ep93xx_priv *ep = netdev_priv(dev);
+ int data;
+ int i;
+
+ wrl(ep, REG_MIICMD, REG_MIICMD_READ | (phy_id << 5) | reg);
+
+ for (i = 0; i < 10; i++) {
+ if ((rdl(ep, REG_MIISTS) & REG_MIISTS_BUSY) == 0)
+ break;
+ msleep(1);
+ }
+
+ if (i == 10) {
+ pr_info("mdio read timed out\n");
+ data = 0xffff;
+ } else {
+ data = rdl(ep, REG_MIIDATA);
+ }
+
+ return data;
+}
+
+static void ep93xx_mdio_write(struct net_device *dev, int phy_id, int reg, int data)
+{
+ struct ep93xx_priv *ep = netdev_priv(dev);
+ int i;
+
+ wrl(ep, REG_MIIDATA, data);
+ wrl(ep, REG_MIICMD, REG_MIICMD_WRITE | (phy_id << 5) | reg);
+
+ for (i = 0; i < 10; i++) {
+ if ((rdl(ep, REG_MIISTS) & REG_MIISTS_BUSY) == 0)
+ break;
+ msleep(1);
+ }
+
+ if (i == 10)
+ pr_info("mdio write timed out\n");
+}

static struct net_device_stats *ep93xx_get_stats(struct net_device *dev)
{
@@ -217,14 +259,11 @@ static int ep93xx_rx(struct net_device *dev, int processed, int budget)
rstat->rstat1 = 0;

if (!(rstat0 & RSTAT0_EOF))
- printk(KERN_CRIT "ep93xx_rx: not end-of-frame "
- " %.8x %.8x\n", rstat0, rstat1);
+ pr_crit("not end-of-frame %.8x %.8x\n", rstat0, rstat1);
if (!(rstat0 & RSTAT0_EOB))
- printk(KERN_CRIT "ep93xx_rx: not end-of-buffer "
- " %.8x %.8x\n", rstat0, rstat1);
+ pr_crit("not end-of-buffer %.8x %.8x\n", rstat0, rstat1);
if ((rstat1 & RSTAT1_BUFFER_INDEX) >> 16 != entry)
- printk(KERN_CRIT "ep93xx_rx: entry mismatch "
- " %.8x %.8x\n", rstat0, rstat1);
+ pr_crit("entry mismatch %.8x %.8x\n", rstat0, rstat1);

if (!(rstat0 & RSTAT0_RWE)) {
ep->stats.rx_errors++;
@@ -241,8 +280,7 @@ static int ep93xx_rx(struct net_device *dev, int processed, int budget)

length = rstat1 & RSTAT1_FRAME_LENGTH;
if (length > MAX_PKT_SIZE) {
- printk(KERN_NOTICE "ep93xx_rx: invalid length "
- " %.8x %.8x\n", rstat0, rstat1);
+ pr_notice("invalid length %.8x %.8x\n", rstat0, rstat1);
goto err;
}

@@ -371,11 +409,9 @@ static void ep93xx_tx_complete(struct net_device *dev)
tstat->tstat0 = 0;

if (tstat0 & TSTAT0_FA)
- printk(KERN_CRIT "ep93xx_tx_complete: frame aborted "
- " %.8x\n", tstat0);
+ pr_crit("frame aborted %.8x\n", tstat0);
if ((tstat0 & TSTAT0_BUFFER_INDEX) != entry)
- printk(KERN_CRIT "ep93xx_tx_complete: entry mismatch "
- " %.8x\n", tstat0);
+ pr_crit("entry mismatch %.8x\n", tstat0);

if (tstat0 & TSTAT0_TXWE) {
int length = ep->descs->tdesc[entry].tdesc1 & 0xfff;
@@ -536,7 +572,7 @@ static int ep93xx_start_hw(struct net_device *dev)
}

if (i == 10) {
- printk(KERN_CRIT DRV_MODULE_NAME ": hw failed to reset\n");
+ pr_crit("hw failed to reset\n");
return 1;
}

@@ -581,7 +617,7 @@ static int ep93xx_start_hw(struct net_device *dev)
}

if (i == 10) {
- printk(KERN_CRIT DRV_MODULE_NAME ": hw failed to start\n");
+ pr_crit("hw failed to start\n");
return 1;
}

@@ -617,7 +653,7 @@ static void ep93xx_stop_hw(struct net_device *dev)
}

if (i == 10)
- printk(KERN_CRIT DRV_MODULE_NAME ": hw failed to reset\n");
+ pr_crit("hw failed to reset\n");
}

static int ep93xx_open(struct net_device *dev)
@@ -681,48 +717,6 @@ static int ep93xx_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
return generic_mii_ioctl(&ep->mii, data, cmd, NULL);
}

-static int ep93xx_mdio_read(struct net_device *dev, int phy_id, int reg)
-{
- struct ep93xx_priv *ep = netdev_priv(dev);
- int data;
- int i;
-
- wrl(ep, REG_MIICMD, REG_MIICMD_READ | (phy_id << 5) | reg);
-
- for (i = 0; i < 10; i++) {
- if ((rdl(ep, REG_MIISTS) & REG_MIISTS_BUSY) == 0)
- break;
- msleep(1);
- }
-
- if (i == 10) {
- printk(KERN_INFO DRV_MODULE_NAME ": mdio read timed out\n");
- data = 0xffff;
- } else {
- data = rdl(ep, REG_MIIDATA);
- }
-
- return data;
-}
-
-static void ep93xx_mdio_write(struct net_device *dev, int phy_id, int reg, int data)
-{
- struct ep93xx_priv *ep = netdev_priv(dev);
- int i;
-
- wrl(ep, REG_MIIDATA, data);
- wrl(ep, REG_MIICMD, REG_MIICMD_WRITE | (phy_id << 5) | reg);
-
- for (i = 0; i < 10; i++) {
- if ((rdl(ep, REG_MIISTS) & REG_MIISTS_BUSY) == 0)
- break;
- msleep(1);
- }
-
- if (i == 10)
- printk(KERN_INFO DRV_MODULE_NAME ": mdio write timed out\n");
-}
-
static void ep93xx_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
{
strcpy(info->driver, DRV_MODULE_NAME);
@@ -825,12 +819,19 @@ static int ep93xx_eth_probe(struct platform_device *pdev)
struct ep93xx_eth_data *data;
struct net_device *dev;
struct ep93xx_priv *ep;
+ struct resource *mem;
+ int irq;
int err;

if (pdev == NULL)
return -ENODEV;
data = pdev->dev.platform_data;

+ mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ irq = platform_get_irq(pdev, 0);
+ if (!mem || irq < 0)
+ return -ENXIO;
+
dev = ep93xx_dev_alloc(data);
if (dev == NULL) {
err = -ENOMEM;
@@ -842,23 +843,21 @@ static int ep93xx_eth_probe(struct platform_device *pdev)

platform_set_drvdata(pdev, dev);

- ep->res = request_mem_region(pdev->resource[0].start,
- pdev->resource[0].end - pdev->resource[0].start + 1,
- dev_name(&pdev->dev));
+ ep->res = request_mem_region(mem->start, resource_size(mem),
+ dev_name(&pdev->dev));
if (ep->res == NULL) {
dev_err(&pdev->dev, "Could not reserve memory region\n");
err = -ENOMEM;
goto err_out;
}

- ep->base_addr = ioremap(pdev->resource[0].start,
- pdev->resource[0].end - pdev->resource[0].start);
+ ep->base_addr = ioremap(mem->start, resource_size(mem));
if (ep->base_addr == NULL) {
dev_err(&pdev->dev, "Failed to ioremap ethernet registers\n");
err = -EIO;
goto err_out;
}
- ep->irq = pdev->resource[1].start;
+ ep->irq = irq;

ep->mii.phy_id = data->phy_id;
ep->mii.phy_id_mask = 0x1f;
@@ -877,11 +876,8 @@ static int ep93xx_eth_probe(struct platform_device *pdev)
goto err_out;
}

- printk(KERN_INFO "%s: ep93xx on-chip ethernet, IRQ %d, "
- "%.2x:%.2x:%.2x:%.2x:%.2x:%.2x.\n", dev->name,
- ep->irq, data->dev_addr[0], data->dev_addr[1],
- data->dev_addr[2], data->dev_addr[3],
- data->dev_addr[4], data->dev_addr[5]);
+ printk(KERN_INFO "%s: ep93xx on-chip ethernet, IRQ %d, %pM\n",
+ dev->name, ep->irq, dev->dev_addr);

return 0;


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