/drivers/net/atlx/atlx.c

  1/* atlx.c -- common functions for Attansic network drivers
  2 *
  3 * Copyright(c) 2005 - 2006 Attansic Corporation. All rights reserved.
  4 * Copyright(c) 2006 - 2007 Chris Snook <csnook@redhat.com>
  5 * Copyright(c) 2006 - 2008 Jay Cliburn <jcliburn@gmail.com>
  6 * Copyright(c) 2007 Atheros Corporation. All rights reserved.
  7 *
  8 * Derived from Intel e1000 driver
  9 * Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
 10 *
 11 * This program is free software; you can redistribute it and/or modify it
 12 * under the terms of the GNU General Public License as published by the Free
 13 * Software Foundation; either version 2 of the License, or (at your option)
 14 * any later version.
 15 *
 16 * This program is distributed in the hope that it will be useful, but WITHOUT
 17 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 18 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 19 * more details.
 20 *
 21 * You should have received a copy of the GNU General Public License along with
 22 * this program; if not, write to the Free Software Foundation, Inc., 59
 23 * Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 24 */
 25
 26/* Including this file like a header is a temporary hack, I promise. -- CHS */
 27#ifndef ATLX_C
 28#define ATLX_C
 29
 30#include <linux/device.h>
 31#include <linux/errno.h>
 32#include <linux/etherdevice.h>
 33#include <linux/if.h>
 34#include <linux/netdevice.h>
 35#include <linux/socket.h>
 36#include <linux/sockios.h>
 37#include <linux/spinlock.h>
 38#include <linux/string.h>
 39#include <linux/types.h>
 40#include <linux/workqueue.h>
 41
 42#include "atlx.h"
 43
 44static s32 atlx_read_phy_reg(struct atl1_hw *hw, u16 reg_addr, u16 *phy_data);
 45static u32 atlx_hash_mc_addr(struct atl1_hw *hw, u8 *mc_addr);
 46static void atlx_set_mac_addr(struct atl1_hw *hw);
 47
 48static struct atlx_spi_flash_dev flash_table[] = {
 49/*	MFR_NAME  WRSR  READ  PRGM  WREN  WRDI  RDSR  RDID  SEC_ERS CHIP_ERS */
 50	{"Atmel", 0x00, 0x03, 0x02, 0x06, 0x04, 0x05, 0x15, 0x52,   0x62},
 51	{"SST",   0x01, 0x03, 0x02, 0x06, 0x04, 0x05, 0x90, 0x20,   0x60},
 52	{"ST",    0x01, 0x03, 0x02, 0x06, 0x04, 0x05, 0xAB, 0xD8,   0xC7},
 53};
 54
 55static int atlx_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
 56{
 57	switch (cmd) {
 58	case SIOCGMIIPHY:
 59	case SIOCGMIIREG:
 60	case SIOCSMIIREG:
 61		return atlx_mii_ioctl(netdev, ifr, cmd);
 62	default:
 63		return -EOPNOTSUPP;
 64	}
 65}
 66
 67/*
 68 * atlx_set_mac - Change the Ethernet Address of the NIC
 69 * @netdev: network interface device structure
 70 * @p: pointer to an address structure
 71 *
 72 * Returns 0 on success, negative on failure
 73 */
 74static int atlx_set_mac(struct net_device *netdev, void *p)
 75{
 76	struct atlx_adapter *adapter = netdev_priv(netdev);
 77	struct sockaddr *addr = p;
 78
 79	if (netif_running(netdev))
 80		return -EBUSY;
 81
 82	if (!is_valid_ether_addr(addr->sa_data))
 83		return -EADDRNOTAVAIL;
 84
 85	memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
 86	memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
 87
 88	atlx_set_mac_addr(&adapter->hw);
 89	return 0;
 90}
 91
 92static void atlx_check_for_link(struct atlx_adapter *adapter)
 93{
 94	struct net_device *netdev = adapter->netdev;
 95	u16 phy_data = 0;
 96
 97	spin_lock(&adapter->lock);
 98	adapter->phy_timer_pending = false;
 99	atlx_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
100	atlx_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
101	spin_unlock(&adapter->lock);
102
103	/* notify upper layer link down ASAP */
104	if (!(phy_data & BMSR_LSTATUS)) {
105		/* Link Down */
106		if (netif_carrier_ok(netdev)) {
107			/* old link state: Up */
108			dev_info(&adapter->pdev->dev, "%s link is down\n",
109				netdev->name);
110			adapter->link_speed = SPEED_0;
111			netif_carrier_off(netdev);
112		}
113	}
114	schedule_work(&adapter->link_chg_task);
115}
116
117/*
118 * atlx_set_multi - Multicast and Promiscuous mode set
119 * @netdev: network interface device structure
120 *
121 * The set_multi entry point is called whenever the multicast address
122 * list or the network interface flags are updated.  This routine is
123 * responsible for configuring the hardware for proper multicast,
124 * promiscuous mode, and all-multi behavior.
125 */
126static void atlx_set_multi(struct net_device *netdev)
127{
128	struct atlx_adapter *adapter = netdev_priv(netdev);
129	struct atlx_hw *hw = &adapter->hw;
130	struct netdev_hw_addr *ha;
131	u32 rctl;
132	u32 hash_value;
133
134	/* Check for Promiscuous and All Multicast modes */
135	rctl = ioread32(hw->hw_addr + REG_MAC_CTRL);
136	if (netdev->flags & IFF_PROMISC)
137		rctl |= MAC_CTRL_PROMIS_EN;
138	else if (netdev->flags & IFF_ALLMULTI) {
139		rctl |= MAC_CTRL_MC_ALL_EN;
140		rctl &= ~MAC_CTRL_PROMIS_EN;
141	} else
142		rctl &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
143
144	iowrite32(rctl, hw->hw_addr + REG_MAC_CTRL);
145
146	/* clear the old settings from the multicast hash table */
147	iowrite32(0, hw->hw_addr + REG_RX_HASH_TABLE);
148	iowrite32(0, (hw->hw_addr + REG_RX_HASH_TABLE) + (1 << 2));
149
150	/* compute mc addresses' hash value ,and put it into hash table */
151	netdev_for_each_mc_addr(ha, netdev) {
152		hash_value = atlx_hash_mc_addr(hw, ha->addr);
153		atlx_hash_set(hw, hash_value);
154	}
155}
156
157/*
158 * atlx_irq_enable - Enable default interrupt generation settings
159 * @adapter: board private structure
160 */
161static void atlx_irq_enable(struct atlx_adapter *adapter)
162{
163	iowrite32(IMR_NORMAL_MASK, adapter->hw.hw_addr + REG_IMR);
164	ioread32(adapter->hw.hw_addr + REG_IMR);
165}
166
167/*
168 * atlx_irq_disable - Mask off interrupt generation on the NIC
169 * @adapter: board private structure
170 */
171static void atlx_irq_disable(struct atlx_adapter *adapter)
172{
173	iowrite32(0, adapter->hw.hw_addr + REG_IMR);
174	ioread32(adapter->hw.hw_addr + REG_IMR);
175	synchronize_irq(adapter->pdev->irq);
176}
177
178static void atlx_clear_phy_int(struct atlx_adapter *adapter)
179{
180	u16 phy_data;
181	unsigned long flags;
182
183	spin_lock_irqsave(&adapter->lock, flags);
184	atlx_read_phy_reg(&adapter->hw, 19, &phy_data);
185	spin_unlock_irqrestore(&adapter->lock, flags);
186}
187
188/*
189 * atlx_tx_timeout - Respond to a Tx Hang
190 * @netdev: network interface device structure
191 */
192static void atlx_tx_timeout(struct net_device *netdev)
193{
194	struct atlx_adapter *adapter = netdev_priv(netdev);
195	/* Do the reset outside of interrupt context */
196	schedule_work(&adapter->reset_dev_task);
197}
198
199/*
200 * atlx_link_chg_task - deal with link change event Out of interrupt context
201 */
202static void atlx_link_chg_task(struct work_struct *work)
203{
204	struct atlx_adapter *adapter;
205	unsigned long flags;
206
207	adapter = container_of(work, struct atlx_adapter, link_chg_task);
208
209	spin_lock_irqsave(&adapter->lock, flags);
210	atlx_check_link(adapter);
211	spin_unlock_irqrestore(&adapter->lock, flags);
212}
213
214static void atlx_vlan_rx_register(struct net_device *netdev,
215	struct vlan_group *grp)
216{
217	struct atlx_adapter *adapter = netdev_priv(netdev);
218	unsigned long flags;
219	u32 ctrl;
220
221	spin_lock_irqsave(&adapter->lock, flags);
222	/* atlx_irq_disable(adapter); FIXME: confirm/remove */
223	adapter->vlgrp = grp;
224
225	if (grp) {
226		/* enable VLAN tag insert/strip */
227		ctrl = ioread32(adapter->hw.hw_addr + REG_MAC_CTRL);
228		ctrl |= MAC_CTRL_RMV_VLAN;
229		iowrite32(ctrl, adapter->hw.hw_addr + REG_MAC_CTRL);
230	} else {
231		/* disable VLAN tag insert/strip */
232		ctrl = ioread32(adapter->hw.hw_addr + REG_MAC_CTRL);
233		ctrl &= ~MAC_CTRL_RMV_VLAN;
234		iowrite32(ctrl, adapter->hw.hw_addr + REG_MAC_CTRL);
235	}
236
237	/* atlx_irq_enable(adapter); FIXME */
238	spin_unlock_irqrestore(&adapter->lock, flags);
239}
240
241static void atlx_restore_vlan(struct atlx_adapter *adapter)
242{
243	atlx_vlan_rx_register(adapter->netdev, adapter->vlgrp);
244}
245
246#endif /* ATLX_C */