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 *------------------------------------------------------------------------------
17 * This software is provided subject to the following terms and conditions,
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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_debug.h"
60 #include "et131x_defs.h"
62 #include <linux/init.h>
63 #include <linux/module.h>
64 #include <linux/types.h>
65 #include <linux/kernel.h>
67 #include <linux/sched.h>
68 #include <linux/ptrace.h>
69 #include <linux/slab.h>
70 #include <linux/ctype.h>
71 #include <linux/string.h>
72 #include <linux/timer.h>
73 #include <linux/interrupt.h>
75 #include <linux/delay.h>
77 #include <linux/bitops.h>
78 #include <asm/system.h>
80 #include <linux/netdevice.h>
81 #include <linux/etherdevice.h>
82 #include <linux/skbuff.h>
83 #include <linux/if_arp.h>
84 #include <linux/ioport.h>
86 #include "et1310_phy.h"
87 #include "et1310_pm.h"
88 #include "et1310_jagcore.h"
89 #include "et1310_mac.h"
90 #include "et1310_rx.h"
92 #include "et131x_adapter.h"
93 #include "et131x_initpci.h"
95 /* Data for debugging facilities */
96 #ifdef CONFIG_ET131X_DEBUG
97 extern dbg_info_t *et131x_dbginfo;
98 #endif /* CONFIG_ET131X_DEBUG */
101 * EnablePhyComa - called when network cable is unplugged
102 * @etdev: pointer to our adapter structure
104 * driver receive an phy status change interrupt while in D0 and check that
105 * phy_status is down.
107 * -- gate off JAGCore;
108 * -- set gigE PHY in Coma mode
109 * -- wake on phy_interrupt; Perform software reset JAGCore,
110 * re-initialize jagcore and gigE PHY
112 * Add D0-ASPM-PhyLinkDown Support:
113 * -- while in D0, when there is a phy_interrupt indicating phy link
114 * down status, call the MPSetPhyComa routine to enter this active
115 * state power saving mode
116 * -- while in D0-ASPM-PhyLinkDown mode, when there is a phy_interrupt
117 * indicating linkup status, call the MPDisablePhyComa routine to
118 * restore JAGCore and gigE PHY
120 void EnablePhyComa(struct et131x_adapter *etdev)
123 PM_CSR_t GlobalPmCSR;
124 int32_t LoopCounter = 10;
126 DBG_ENTER(et131x_dbginfo);
128 GlobalPmCSR.value = readl(&etdev->regs->global.pm_csr.value);
130 /* Save the GbE PHY speed and duplex modes. Need to restore this
131 * when cable is plugged back in
133 etdev->PoMgmt.PowerDownSpeed = etdev->AiForceSpeed;
134 etdev->PoMgmt.PowerDownDuplex = etdev->AiForceDpx;
136 /* Stop sending packets. */
137 spin_lock_irqsave(&etdev->SendHWLock, flags);
138 MP_SET_FLAG(etdev, fMP_ADAPTER_LOWER_POWER);
139 spin_unlock_irqrestore(&etdev->SendHWLock, flags);
141 /* Wait for outstanding Receive packets */
143 /* Gate off JAGCore 3 clock domains */
144 GlobalPmCSR.bits.pm_sysclk_gate = 0;
145 GlobalPmCSR.bits.pm_txclk_gate = 0;
146 GlobalPmCSR.bits.pm_rxclk_gate = 0;
147 writel(GlobalPmCSR.value, &etdev->regs->global.pm_csr.value);
149 /* Program gigE PHY in to Coma mode */
150 GlobalPmCSR.bits.pm_phy_sw_coma = 1;
151 writel(GlobalPmCSR.value, &etdev->regs->global.pm_csr.value);
153 DBG_LEAVE(et131x_dbginfo);
157 * DisablePhyComa - Disable the Phy Coma Mode
158 * @etdev: pointer to our adapter structure
160 void DisablePhyComa(struct et131x_adapter *etdev)
162 PM_CSR_t GlobalPmCSR;
164 DBG_ENTER(et131x_dbginfo);
166 GlobalPmCSR.value = readl(&etdev->regs->global.pm_csr.value);
168 /* Disable phy_sw_coma register and re-enable JAGCore clocks */
169 GlobalPmCSR.bits.pm_sysclk_gate = 1;
170 GlobalPmCSR.bits.pm_txclk_gate = 1;
171 GlobalPmCSR.bits.pm_rxclk_gate = 1;
172 GlobalPmCSR.bits.pm_phy_sw_coma = 0;
173 writel(GlobalPmCSR.value, &etdev->regs->global.pm_csr.value);
175 /* Restore the GbE PHY speed and duplex modes;
176 * Reset JAGCore; re-configure and initialize JAGCore and gigE PHY
178 etdev->AiForceSpeed = etdev->PoMgmt.PowerDownSpeed;
179 etdev->AiForceDpx = etdev->PoMgmt.PowerDownDuplex;
181 /* Re-initialize the send structures */
182 et131x_init_send(etdev);
184 /* Reset the RFD list and re-start RU */
185 et131x_reset_recv(etdev);
187 /* Bring the device back to the state it was during init prior to
188 * autonegotiation being complete. This way, when we get the auto-neg
189 * complete interrupt, we can complete init by calling ConfigMacREGS2.
191 et131x_soft_reset(etdev);
193 /* setup et1310 as per the documentation ?? */
194 et131x_adapter_setup(etdev);
196 /* Allow Tx to restart */
197 MP_CLEAR_FLAG(etdev, fMP_ADAPTER_LOWER_POWER);
199 /* Need to re-enable Rx. */
200 et131x_rx_dma_enable(etdev);
202 DBG_LEAVE(et131x_dbginfo);