1 files changed, 319 insertions, 0 deletions
diff --git a/linux/drivers/net/gianfar_sysfs.c b/linux/drivers/net/gianfar_sysfs.c
new file mode 100644
index 000000000..dd26da74f
--- /dev/null
+++ b/linux/drivers/net/gianfar_sysfs.c
@@ -0,0 +1,319 @@
+/*
+ * drivers/net/gianfar_sysfs.c
+ *
+ * Gianfar Ethernet Driver
+ * This driver is designed for the non-CPM ethernet controllers
+ * on the 85xx and 83xx family of integrated processors
+ * Based on 8260_io/fcc_enet.c
+ *
+ * Author: Andy Fleming
+ * Maintainer: Kumar Gala (galak@kernel.crashing.org)
+ *
+ * Copyright (c) 2002-2005 Freescale Semiconductor, Inc.
+ *
+ * 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 2 of the  License, or (at your
+ * option) any later version.
+ *
+ * Sysfs file creation and management
+ */
+
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/unistd.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/etherdevice.h>
+#include <linux/spinlock.h>
+#include <linux/mm.h>
+#include <linux/device.h>
+
+#include <asm/uaccess.h>
+#include <linux/module.h>
+
+#include "gianfar.h"
+
+static ssize_t gfar_show_bd_stash(struct device *dev,
+				  struct device_attribute *attr, char *buf)
+{
+	struct gfar_private *priv = netdev_priv(to_net_dev(dev));
+
+	return sprintf(buf, "%s\n", priv->bd_stash_en ? "on" : "off");
+}
+
+static ssize_t gfar_set_bd_stash(struct device *dev,
+				 struct device_attribute *attr,
+				 const char *buf, size_t count)
+{
+	struct gfar_private *priv = netdev_priv(to_net_dev(dev));
+	int new_setting = 0;
+	u32 temp;
+	unsigned long flags;
+
+	if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_BD_STASHING))
+		return count;
+
+	/* Find out the new setting */
+	if (!strncmp("on", buf, count - 1) || !strncmp("1", buf, count - 1))
+		new_setting = 1;
+	else if (!strncmp("off", buf, count - 1)
+		 || !strncmp("0", buf, count - 1))
+		new_setting = 0;
+	else
+		return count;
+
+	spin_lock_irqsave(&priv->rxlock, flags);
+
+	/* Set the new stashing value */
+	priv->bd_stash_en = new_setting;
+
+	temp = gfar_read(&priv->regs->attr);
+
+	if (new_setting)
+		temp |= ATTR_BDSTASH;
+	else
+		temp &= ~(ATTR_BDSTASH);
+
+	gfar_write(&priv->regs->attr, temp);
+
+	spin_unlock_irqrestore(&priv->rxlock, flags);
+
+	return count;
+}
+
+static DEVICE_ATTR(bd_stash, 0644, gfar_show_bd_stash, gfar_set_bd_stash);
+
+static ssize_t gfar_show_rx_stash_size(struct device *dev,
+				       struct device_attribute *attr, char *buf)
+{
+	struct gfar_private *priv = netdev_priv(to_net_dev(dev));
+
+	return sprintf(buf, "%d\n", priv->rx_stash_size);
+}
+
+static ssize_t gfar_set_rx_stash_size(struct device *dev,
+				      struct device_attribute *attr,
+				      const char *buf, size_t count)
+{
+	struct gfar_private *priv = netdev_priv(to_net_dev(dev));
+	unsigned int length = simple_strtoul(buf, NULL, 0);
+	u32 temp;
+	unsigned long flags;
+
+	if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_BUF_STASHING))
+		return count;
+
+	spin_lock_irqsave(&priv->rxlock, flags);
+	if (length > priv->rx_buffer_size)
+		goto out;
+
+	if (length == priv->rx_stash_size)
+		goto out;
+
+	priv->rx_stash_size = length;
+
+	temp = gfar_read(&priv->regs->attreli);
+	temp &= ~ATTRELI_EL_MASK;
+	temp |= ATTRELI_EL(length);
+	gfar_write(&priv->regs->attreli, temp);
+
+	/* Turn stashing on/off as appropriate */
+	temp = gfar_read(&priv->regs->attr);
+
+	if (length)
+		temp |= ATTR_BUFSTASH;
+	else
+		temp &= ~(ATTR_BUFSTASH);
+
+	gfar_write(&priv->regs->attr, temp);
+
+out:
+	spin_unlock_irqrestore(&priv->rxlock, flags);
+
+	return count;
+}
+
+static DEVICE_ATTR(rx_stash_size, 0644, gfar_show_rx_stash_size,
+		   gfar_set_rx_stash_size);
+
+/* Stashing will only be enabled when rx_stash_size != 0 */
+static ssize_t gfar_show_rx_stash_index(struct device *dev,
+					struct device_attribute *attr,
+					char *buf)
+{
+	struct gfar_private *priv = netdev_priv(to_net_dev(dev));
+
+	return sprintf(buf, "%d\n", priv->rx_stash_index);
+}
+
+static ssize_t gfar_set_rx_stash_index(struct device *dev,
+				       struct device_attribute *attr,
+				       const char *buf, size_t count)
+{
+	struct gfar_private *priv = netdev_priv(to_net_dev(dev));
+	unsigned short index = simple_strtoul(buf, NULL, 0);
+	u32 temp;
+	unsigned long flags;
+
+	if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_BUF_STASHING))
+		return count;
+
+	spin_lock_irqsave(&priv->rxlock, flags);
+	if (index > priv->rx_stash_size)
+		goto out;
+
+	if (index == priv->rx_stash_index)
+		goto out;
+
+	priv->rx_stash_index = index;
+
+	temp = gfar_read(&priv->regs->attreli);
+	temp &= ~ATTRELI_EI_MASK;
+	temp |= ATTRELI_EI(index);
+	gfar_write(&priv->regs->attreli, flags);
+
+out:
+	spin_unlock_irqrestore(&priv->rxlock, flags);
+
+	return count;
+}
+
+static DEVICE_ATTR(rx_stash_index, 0644, gfar_show_rx_stash_index,
+		   gfar_set_rx_stash_index);
+
+static ssize_t gfar_show_fifo_threshold(struct device *dev,
+					struct device_attribute *attr,
+					char *buf)
+{
+	struct gfar_private *priv = netdev_priv(to_net_dev(dev));
+
+	return sprintf(buf, "%d\n", priv->fifo_threshold);
+}
+
+static ssize_t gfar_set_fifo_threshold(struct device *dev,
+				       struct device_attribute *attr,
+				       const char *buf, size_t count)
+{
+	struct gfar_private *priv = netdev_priv(to_net_dev(dev));
+	unsigned int length = simple_strtoul(buf, NULL, 0);
+	u32 temp;
+	unsigned long flags;
+
+	if (length > GFAR_MAX_FIFO_THRESHOLD)
+		return count;
+
+	spin_lock_irqsave(&priv->txlock, flags);
+
+	priv->fifo_threshold = length;
+
+	temp = gfar_read(&priv->regs->fifo_tx_thr);
+	temp &= ~FIFO_TX_THR_MASK;
+	temp |= length;
+	gfar_write(&priv->regs->fifo_tx_thr, temp);
+
+	spin_unlock_irqrestore(&priv->txlock, flags);
+
+	return count;
+}
+
+static DEVICE_ATTR(fifo_threshold, 0644, gfar_show_fifo_threshold,
+		   gfar_set_fifo_threshold);
+
+static ssize_t gfar_show_fifo_starve(struct device *dev,
+				     struct device_attribute *attr, char *buf)
+{
+	struct gfar_private *priv = netdev_priv(to_net_dev(dev));
+
+	return sprintf(buf, "%d\n", priv->fifo_starve);
+}
+
+static ssize_t gfar_set_fifo_starve(struct device *dev,
+				    struct device_attribute *attr,
+				    const char *buf, size_t count)
+{
+	struct gfar_private *priv = netdev_priv(to_net_dev(dev));
+	unsigned int num = simple_strtoul(buf, NULL, 0);
+	u32 temp;
+	unsigned long flags;
+
+	if (num > GFAR_MAX_FIFO_STARVE)
+		return count;
+
+	spin_lock_irqsave(&priv->txlock, flags);
+
+	priv->fifo_starve = num;
+
+	temp = gfar_read(&priv->regs->fifo_tx_starve);
+	temp &= ~FIFO_TX_STARVE_MASK;
+	temp |= num;
+	gfar_write(&priv->regs->fifo_tx_starve, temp);
+
+	spin_unlock_irqrestore(&priv->txlock, flags);
+
+	return count;
+}
+
+static DEVICE_ATTR(fifo_starve, 0644, gfar_show_fifo_starve,
+		   gfar_set_fifo_starve);
+
+static ssize_t gfar_show_fifo_starve_off(struct device *dev,
+					 struct device_attribute *attr,
+					 char *buf)
+{
+	struct gfar_private *priv = netdev_priv(to_net_dev(dev));
+
+	return sprintf(buf, "%d\n", priv->fifo_starve_off);
+}
+
+static ssize_t gfar_set_fifo_starve_off(struct device *dev,
+					struct device_attribute *attr,
+					const char *buf, size_t count)
+{
+	struct gfar_private *priv = netdev_priv(to_net_dev(dev));
+	unsigned int num = simple_strtoul(buf, NULL, 0);
+	u32 temp;
+	unsigned long flags;
+
+	if (num > GFAR_MAX_FIFO_STARVE_OFF)
+		return count;
+
+	spin_lock_irqsave(&priv->txlock, flags);
+
+	priv->fifo_starve_off = num;
+
+	temp = gfar_read(&priv->regs->fifo_tx_starve_shutoff);
+	temp &= ~FIFO_TX_STARVE_OFF_MASK;
+	temp |= num;
+	gfar_write(&priv->regs->fifo_tx_starve_shutoff, temp);
+
+	spin_unlock_irqrestore(&priv->txlock, flags);
+
+	return count;
+}
+
+static DEVICE_ATTR(fifo_starve_off, 0644, gfar_show_fifo_starve_off,
+		   gfar_set_fifo_starve_off);
+
+void gfar_init_sysfs(struct net_device *dev)
+{
+	struct gfar_private *priv = netdev_priv(dev);
+	int rc;
+
+	/* Initialize the default values */
+	priv->fifo_threshold = DEFAULT_FIFO_TX_THR;
+	priv->fifo_starve = DEFAULT_FIFO_TX_STARVE;
+	priv->fifo_starve_off = DEFAULT_FIFO_TX_STARVE_OFF;
+
+	/* Create our sysfs files */
+	rc = device_create_file(&dev->dev, &dev_attr_bd_stash);
+	rc |= device_create_file(&dev->dev, &dev_attr_rx_stash_size);
+	rc |= device_create_file(&dev->dev, &dev_attr_rx_stash_index);
+	rc |= device_create_file(&dev->dev, &dev_attr_fifo_threshold);
+	rc |= device_create_file(&dev->dev, &dev_attr_fifo_starve);
+	rc |= device_create_file(&dev->dev, &dev_attr_fifo_starve_off);
+	if (rc)
+		dev_err(&dev->dev, "Error creating gianfar sysfs files.\n");
+}