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1/*
2 * Agere Systems Inc.
3 * 10/100/1000 Base-T Ethernet Driver for the ET1301 and ET131x series MACs
4 *
5 * Copyright © 2005 Agere Systems Inc.
6 * All rights reserved.
7 * http://www.agere.com
8 *
9 *------------------------------------------------------------------------------
10 *
11 * et1310_pm.c - All power management related code (not completely implemented)
12 *
13 *------------------------------------------------------------------------------
14 *
15 * SOFTWARE LICENSE
16 *
17 * This software is provided subject to the following terms and conditions,
18 * which you should read carefully before using the software. Using this
19 * software indicates your acceptance of these terms and conditions. If you do
20 * not agree with these terms and conditions, do not use the software.
21 *
22 * Copyright © 2005 Agere Systems Inc.
23 * All rights reserved.
24 *
25 * Redistribution and use in source or binary forms, with or without
26 * modifications, are permitted provided that the following conditions are met:
27 *
28 * . Redistributions of source code must retain the above copyright notice, this
29 * list of conditions and the following Disclaimer as comments in the code as
30 * well as in the documentation and/or other materials provided with the
31 * distribution.
32 *
33 * . Redistributions in binary form must reproduce the above copyright notice,
34 * this list of conditions and the following Disclaimer in the documentation
35 * and/or other materials provided with the distribution.
36 *
37 * . Neither the name of Agere Systems Inc. nor the names of the contributors
38 * may be used to endorse or promote products derived from this software
39 * without specific prior written permission.
40 *
41 * Disclaimer
42 *
43 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
44 * INCLUDING, BUT NOT LIMITED TO, INFRINGEMENT AND THE IMPLIED WARRANTIES OF
45 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. ANY
46 * USE, MODIFICATION OR DISTRIBUTION OF THIS SOFTWARE IS SOLELY AT THE USERS OWN
47 * RISK. IN NO EVENT SHALL AGERE SYSTEMS INC. OR CONTRIBUTORS BE LIABLE FOR ANY
48 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
49 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
50 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
51 * ON ANY THEORY OF LIABILITY, INCLUDING, BUT NOT LIMITED TO, CONTRACT, STRICT
52 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
53 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
54 * DAMAGE.
55 *
56 */
57
58#include "et131x_version.h"
59#include "et131x_defs.h"
60
61#include <linux/init.h>
62#include <linux/module.h>
63#include <linux/types.h>
64#include <linux/kernel.h>
65
66#include <linux/sched.h>
67#include <linux/ptrace.h>
68#include <linux/ctype.h>
69#include <linux/string.h>
70#include <linux/timer.h>
71#include <linux/interrupt.h>
72#include <linux/in.h>
73#include <linux/delay.h>
74#include <linux/io.h>
75#include <linux/bitops.h>
76#include <asm/system.h>
77
78#include <linux/netdevice.h>
79#include <linux/etherdevice.h>
80#include <linux/skbuff.h>
81#include <linux/if_arp.h>
82#include <linux/ioport.h>
83
84#include "et1310_phy.h"
85#include "et1310_rx.h"
86#include "et131x_adapter.h"
87#include "et131x.h"
88
89/**
90 * EnablePhyComa - called when network cable is unplugged
91 * @etdev: pointer to our adapter structure
92 *
93 * driver receive an phy status change interrupt while in D0 and check that
94 * phy_status is down.
95 *
96 * -- gate off JAGCore;
97 * -- set gigE PHY in Coma mode
98 * -- wake on phy_interrupt; Perform software reset JAGCore,
99 * re-initialize jagcore and gigE PHY
100 *
101 * Add D0-ASPM-PhyLinkDown Support:
102 * -- while in D0, when there is a phy_interrupt indicating phy link
103 * down status, call the MPSetPhyComa routine to enter this active
104 * state power saving mode
105 * -- while in D0-ASPM-PhyLinkDown mode, when there is a phy_interrupt
106 * indicating linkup status, call the MPDisablePhyComa routine to
107 * restore JAGCore and gigE PHY
108 */
109void EnablePhyComa(struct et131x_adapter *etdev)
110{
111 unsigned long flags;
112 u32 pmcsr;
113
114 pmcsr = readl(&etdev->regs->global.pm_csr);
115
116 /* Save the GbE PHY speed and duplex modes. Need to restore this
117 * when cable is plugged back in
118 */
119 etdev->pdown_speed = etdev->AiForceSpeed;
120 etdev->pdown_duplex = etdev->AiForceDpx;
121
122 /* Stop sending packets. */
123 spin_lock_irqsave(&etdev->send_hw_lock, flags);
124 etdev->flags |= fMP_ADAPTER_LOWER_POWER;
125 spin_unlock_irqrestore(&etdev->send_hw_lock, flags);
126
127 /* Wait for outstanding Receive packets */
128
129 /* Gate off JAGCore 3 clock domains */
130 pmcsr &= ~ET_PMCSR_INIT;
131 writel(pmcsr, &etdev->regs->global.pm_csr);
132
133 /* Program gigE PHY in to Coma mode */
134 pmcsr |= ET_PM_PHY_SW_COMA;
135 writel(pmcsr, &etdev->regs->global.pm_csr);
136}
137
138/**
139 * DisablePhyComa - Disable the Phy Coma Mode
140 * @etdev: pointer to our adapter structure
141 */
142void DisablePhyComa(struct et131x_adapter *etdev)
143{
144 u32 pmcsr;
145
146 pmcsr = readl(&etdev->regs->global.pm_csr);
147
148 /* Disable phy_sw_coma register and re-enable JAGCore clocks */
149 pmcsr |= ET_PMCSR_INIT;
150 pmcsr &= ~ET_PM_PHY_SW_COMA;
151 writel(pmcsr, &etdev->regs->global.pm_csr);
152
153 /* Restore the GbE PHY speed and duplex modes;
154 * Reset JAGCore; re-configure and initialize JAGCore and gigE PHY
155 */
156 etdev->AiForceSpeed = etdev->pdown_speed;
157 etdev->AiForceDpx = etdev->pdown_duplex;
158
159 /* Re-initialize the send structures */
160 et131x_init_send(etdev);
161
162 /* Reset the RFD list and re-start RU */
163 et131x_reset_recv(etdev);
164
165 /* Bring the device back to the state it was during init prior to
166 * autonegotiation being complete. This way, when we get the auto-neg
167 * complete interrupt, we can complete init by calling ConfigMacREGS2.
168 */
169 et131x_soft_reset(etdev);
170
171 /* setup et1310 as per the documentation ?? */
172 et131x_adapter_setup(etdev);
173
174 /* Allow Tx to restart */
175 etdev->flags &= ~fMP_ADAPTER_LOWER_POWER;
176
177 /* Need to re-enable Rx. */
178 et131x_rx_dma_enable(etdev);
179}
180