Add Attansic L1 ethernet driver.

This driver is a modified version of the Attansic reference driver
for the L1 ethernet adapter.  Attansic has granted permission for
its inclusion in the mainline kernel.

Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 206 insertions, 0 deletions

diff --git a/drivers/net/atl1/atl1_param.c b/drivers/net/atl1/atl1_param.c
new file mode 100644
index 00000000000..c407214339f
--- /dev/null
+++ b/drivers/net/atl1/atl1_param.c
@@ -0,0 +1,206 @@
+/*
+ * Copyright(c) 2005 - 2006 Attansic Corporation. All rights reserved.
+ * Copyright(c) 2006 Chris Snook <csnook@redhat.com>
+ * Copyright(c) 2006 Jay Cliburn <jcliburn@gmail.com>
+ *
+ * Derived from Intel e1000 driver
+ * Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
+ *
+ * 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.
+ *
+ * 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., 59
+ * Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ */
+
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/moduleparam.h>
+#include "atl1.h"
+
+/*
+ * This is the only thing that needs to be changed to adjust the
+ * maximum number of ports that the driver can manage.
+ */
+#define ATL1_MAX_NIC 4
+
+#define OPTION_UNSET    -1
+#define OPTION_DISABLED 0
+#define OPTION_ENABLED  1
+
+#define ATL1_PARAM_INIT { [0 ... ATL1_MAX_NIC] = OPTION_UNSET }
+
+/*
+ * Interrupt Moderate Timer in units of 2 us
+ *
+ * Valid Range: 10-65535
+ *
+ * Default Value: 100 (200us)
+ */
+static int __devinitdata int_mod_timer[ATL1_MAX_NIC+1] = ATL1_PARAM_INIT;
+static int num_int_mod_timer = 0;
+module_param_array_named(int_mod_timer, int_mod_timer, int, &num_int_mod_timer, 0);
+MODULE_PARM_DESC(int_mod_timer, "Interrupt moderator timer");
+
+/*
+ * flash_vendor
+ *
+ * Valid Range: 0-2
+ *
+ * 0 - Atmel
+ * 1 - SST
+ * 2 - ST
+ *
+ * Default Value: 0
+ */
+static int __devinitdata flash_vendor[ATL1_MAX_NIC+1] = ATL1_PARAM_INIT;
+static int num_flash_vendor = 0;
+module_param_array_named(flash_vendor, flash_vendor, int, &num_flash_vendor, 0);
+MODULE_PARM_DESC(flash_vendor, "SPI flash vendor");
+
+#define DEFAULT_INT_MOD_CNT	100	/* 200us */
+#define MAX_INT_MOD_CNT		65000
+#define MIN_INT_MOD_CNT		50
+
+#define FLASH_VENDOR_DEFAULT	0
+#define FLASH_VENDOR_MIN	0
+#define FLASH_VENDOR_MAX	2
+
+struct atl1_option {
+	enum { enable_option, range_option, list_option } type;
+	char *name;
+	char *err;
+	int def;
+	union {
+		struct {	/* range_option info */
+			int min;
+			int max;
+		} r;
+		struct {	/* list_option info */
+			int nr;
+			struct atl1_opt_list {
+				int i;
+				char *str;
+			} *p;
+		} l;
+	} arg;
+};
+
+static int __devinit atl1_validate_option(int *value, struct atl1_option *opt)
+{
+	if (*value == OPTION_UNSET) {
+		*value = opt->def;
+		return 0;
+	}
+
+	switch (opt->type) {
+	case enable_option:
+		switch (*value) {
+		case OPTION_ENABLED:
+			printk(KERN_INFO "%s: %s Enabled\n", atl1_driver_name,
+				opt->name);
+			return 0;
+		case OPTION_DISABLED:
+			printk(KERN_INFO "%s: %s Disabled\n", atl1_driver_name,
+				opt->name);
+			return 0;
+		}
+		break;
+	case range_option:
+		if (*value >= opt->arg.r.min && *value <= opt->arg.r.max) {
+			printk(KERN_INFO "%s: %s set to %i\n",
+				atl1_driver_name, opt->name, *value);
+			return 0;
+		}
+		break;
+	case list_option:{
+			int i;
+			struct atl1_opt_list *ent;
+
+			for (i = 0; i < opt->arg.l.nr; i++) {
+				ent = &opt->arg.l.p[i];
+				if (*value == ent->i) {
+					if (ent->str[0] != '\0')
+						printk(KERN_INFO "%s: %s\n",
+						       atl1_driver_name, ent->str);
+					return 0;
+				}
+			}
+		}
+		break;
+
+	default:
+		break;
+	}
+
+	printk(KERN_INFO "%s: invalid %s specified (%i) %s\n",
+	       atl1_driver_name, opt->name, *value, opt->err);
+	*value = opt->def;
+	return -1;
+}
+
+/*
+ * atl1_check_options - Range Checking for Command Line Parameters
+ * @adapter: board private structure
+ *
+ * This routine checks all command line parameters for valid user
+ * input.  If an invalid value is given, or if no user specified
+ * value exists, a default value is used.  The final value is stored
+ * in a variable in the adapter structure.
+ */
+void __devinit atl1_check_options(struct atl1_adapter *adapter)
+{
+	int bd = adapter->bd_number;
+	if (bd >= ATL1_MAX_NIC) {
+		printk(KERN_NOTICE "%s: warning: no configuration for board #%i\n",
+			atl1_driver_name, bd);
+		printk(KERN_NOTICE "%s: using defaults for all values\n",
+			atl1_driver_name);
+	}
+	{			/* Interrupt Moderate Timer */
+		struct atl1_option opt = {
+			.type = range_option,
+			.name = "Interrupt Moderator Timer",
+			.err = "using default of "
+				__MODULE_STRING(DEFAULT_INT_MOD_CNT),
+			.def = DEFAULT_INT_MOD_CNT,
+			.arg = {.r =
+				{.min = MIN_INT_MOD_CNT,.max = MAX_INT_MOD_CNT}}
+		};
+		int val;
+		if (num_int_mod_timer > bd) {
+			val = int_mod_timer[bd];
+			atl1_validate_option(&val, &opt);
+			adapter->imt = (u16) val;
+		} else
+			adapter->imt = (u16) (opt.def);
+	}
+
+	{			/* Flash Vendor */
+		struct atl1_option opt = {
+			.type = range_option,
+			.name = "SPI Flash Vendor",
+			.err = "using default of "
+				__MODULE_STRING(FLASH_VENDOR_DEFAULT),
+			.def = DEFAULT_INT_MOD_CNT,
+			.arg = {.r =
+				{.min = FLASH_VENDOR_MIN,.max =
+				 FLASH_VENDOR_MAX}}
+		};
+		int val;
+		if (num_flash_vendor > bd) {
+			val = flash_vendor[bd];
+			atl1_validate_option(&val, &opt);
+			adapter->hw.flash_vendor = (u8) val;
+		} else
+			adapter->hw.flash_vendor = (u8) (opt.def);
+	}
+}