3 * 10/100/1000 Base-T Ethernet Driver for the ET1301 and ET131x series MACs
5 * Copyright © 2005 Agere Systems Inc.
9 *------------------------------------------------------------------------------
11 * et1310_pm.c - All power management related code (not completely implemented)
13 *------------------------------------------------------------------------------
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22 * Copyright © 2005 Agere Systems Inc.
23 * All rights reserved.
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26 * modifications, are permitted provided that the following conditions are met:
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58 #include "et131x_version.h"
59 #include "et131x_defs.h"
61 #include <linux/init.h>
62 #include <linux/module.h>
63 #include <linux/types.h>
64 #include <linux/kernel.h>
66 #include <linux/sched.h>
67 #include <linux/ptrace.h>
68 #include <linux/slab.h>
69 #include <linux/ctype.h>
70 #include <linux/string.h>
71 #include <linux/timer.h>
72 #include <linux/interrupt.h>
74 #include <linux/delay.h>
76 #include <linux/bitops.h>
77 #include <asm/system.h>
79 #include <linux/netdevice.h>
80 #include <linux/etherdevice.h>
81 #include <linux/skbuff.h>
82 #include <linux/if_arp.h>
83 #include <linux/ioport.h>
85 #include "et1310_phy.h"
86 #include "et1310_rx.h"
87 #include "et131x_adapter.h"
91 * EnablePhyComa - called when network cable is unplugged
92 * @etdev: pointer to our adapter structure
94 * driver receive an phy status change interrupt while in D0 and check that
97 * -- gate off JAGCore;
98 * -- set gigE PHY in Coma mode
99 * -- wake on phy_interrupt; Perform software reset JAGCore,
100 * re-initialize jagcore and gigE PHY
102 * Add D0-ASPM-PhyLinkDown Support:
103 * -- while in D0, when there is a phy_interrupt indicating phy link
104 * down status, call the MPSetPhyComa routine to enter this active
105 * state power saving mode
106 * -- while in D0-ASPM-PhyLinkDown mode, when there is a phy_interrupt
107 * indicating linkup status, call the MPDisablePhyComa routine to
108 * restore JAGCore and gigE PHY
110 void EnablePhyComa(struct et131x_adapter *etdev)
115 GlobalPmCSR = readl(&etdev->regs->global.pm_csr);
117 /* Save the GbE PHY speed and duplex modes. Need to restore this
118 * when cable is plugged back in
120 etdev->PoMgmt.PowerDownSpeed = etdev->AiForceSpeed;
121 etdev->PoMgmt.PowerDownDuplex = etdev->AiForceDpx;
123 /* Stop sending packets. */
124 spin_lock_irqsave(&etdev->SendHWLock, flags);
125 etdev->Flags |= fMP_ADAPTER_LOWER_POWER;
126 spin_unlock_irqrestore(&etdev->SendHWLock, flags);
128 /* Wait for outstanding Receive packets */
130 /* Gate off JAGCore 3 clock domains */
131 GlobalPmCSR &= ~ET_PMCSR_INIT;
132 writel(GlobalPmCSR, &etdev->regs->global.pm_csr);
134 /* Program gigE PHY in to Coma mode */
135 GlobalPmCSR |= ET_PM_PHY_SW_COMA;
136 writel(GlobalPmCSR, &etdev->regs->global.pm_csr);
140 * DisablePhyComa - Disable the Phy Coma Mode
141 * @etdev: pointer to our adapter structure
143 void DisablePhyComa(struct et131x_adapter *etdev)
147 GlobalPmCSR = readl(&etdev->regs->global.pm_csr);
149 /* Disable phy_sw_coma register and re-enable JAGCore clocks */
150 GlobalPmCSR |= ET_PMCSR_INIT;
151 GlobalPmCSR &= ~ET_PM_PHY_SW_COMA;
152 writel(GlobalPmCSR, &etdev->regs->global.pm_csr);
154 /* Restore the GbE PHY speed and duplex modes;
155 * Reset JAGCore; re-configure and initialize JAGCore and gigE PHY
157 etdev->AiForceSpeed = etdev->PoMgmt.PowerDownSpeed;
158 etdev->AiForceDpx = etdev->PoMgmt.PowerDownDuplex;
160 /* Re-initialize the send structures */
161 et131x_init_send(etdev);
163 /* Reset the RFD list and re-start RU */
164 et131x_reset_recv(etdev);
166 /* Bring the device back to the state it was during init prior to
167 * autonegotiation being complete. This way, when we get the auto-neg
168 * complete interrupt, we can complete init by calling ConfigMacREGS2.
170 et131x_soft_reset(etdev);
172 /* setup et1310 as per the documentation ?? */
173 et131x_adapter_setup(etdev);
175 /* Allow Tx to restart */
176 etdev->Flags &= ~fMP_ADAPTER_LOWER_POWER;
178 /* Need to re-enable Rx. */
179 et131x_rx_dma_enable(etdev);