diff options
Diffstat (limited to 'drivers/staging/et131x/et1310_pm.c')
| -rw-r--r-- | drivers/staging/et131x/et1310_pm.c | 207 |
1 files changed, 207 insertions, 0 deletions
diff --git a/drivers/staging/et131x/et1310_pm.c b/drivers/staging/et131x/et1310_pm.c new file mode 100644 index 000000000000..9539bc628cae --- /dev/null +++ b/drivers/staging/et131x/et1310_pm.c @@ -0,0 +1,207 @@ +/* + * Agere Systems Inc. + * 10/100/1000 Base-T Ethernet Driver for the ET1301 and ET131x series MACs + * + * Copyright © 2005 Agere Systems Inc. + * All rights reserved. + * http://www.agere.com + * + *------------------------------------------------------------------------------ + * + * et1310_pm.c - All power management related code (not completely implemented) + * + *------------------------------------------------------------------------------ + * + * SOFTWARE LICENSE + * + * This software is provided subject to the following terms and conditions, + * which you should read carefully before using the software. Using this + * software indicates your acceptance of these terms and conditions. If you do + * not agree with these terms and conditions, do not use the software. + * + * Copyright © 2005 Agere Systems Inc. + * All rights reserved. + * + * Redistribution and use in source or binary forms, with or without + * modifications, are permitted provided that the following conditions are met: + * + * . Redistributions of source code must retain the above copyright notice, this + * list of conditions and the following Disclaimer as comments in the code as + * well as in the documentation and/or other materials provided with the + * distribution. + * + * . Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following Disclaimer in the documentation + * and/or other materials provided with the distribution. + * + * . Neither the name of Agere Systems Inc. nor the names of the contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * Disclaimer + * + * THIS SOFTWARE IS PROVIDED “AS IS” AND ANY EXPRESS OR IMPLIED WARRANTIES, + * INCLUDING, BUT NOT LIMITED TO, INFRINGEMENT AND THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. ANY + * USE, MODIFICATION OR DISTRIBUTION OF THIS SOFTWARE IS SOLELY AT THE USERS OWN + * RISK. IN NO EVENT SHALL AGERE SYSTEMS INC. OR CONTRIBUTORS BE LIABLE FOR ANY + * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + * ON ANY THEORY OF LIABILITY, INCLUDING, BUT NOT LIMITED TO, CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT + * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH + * DAMAGE. + * + */ + +#include "et131x_version.h" +#include "et131x_debug.h" +#include "et131x_defs.h" + +#include <linux/init.h> +#include <linux/module.h> +#include <linux/types.h> +#include <linux/kernel.h> + +#include <linux/sched.h> +#include <linux/ptrace.h> +#include <linux/slab.h> +#include <linux/ctype.h> +#include <linux/string.h> +#include <linux/timer.h> +#include <linux/interrupt.h> +#include <linux/in.h> +#include <linux/delay.h> +#include <asm/io.h> +#include <asm/system.h> +#include <asm/bitops.h> + +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/skbuff.h> +#include <linux/if_arp.h> +#include <linux/ioport.h> + +#include "et1310_phy.h" +#include "et1310_pm.h" +#include "et1310_jagcore.h" +#include "et1310_mac.h" +#include "et1310_rx.h" + +#include "et131x_adapter.h" +#include "et131x_initpci.h" + +/* Data for debugging facilities */ +#ifdef CONFIG_ET131X_DEBUG +extern dbg_info_t *et131x_dbginfo; +#endif /* CONFIG_ET131X_DEBUG */ + +/** + * EnablePhyComa - called when network cable is unplugged + * @pAdapter: pointer to our adapter structure + * + * driver receive an phy status change interrupt while in D0 and check that + * phy_status is down. + * + * -- gate off JAGCore; + * -- set gigE PHY in Coma mode + * -- wake on phy_interrupt; Perform software reset JAGCore, + * re-initialize jagcore and gigE PHY + * + * Add D0-ASPM-PhyLinkDown Support: + * -- while in D0, when there is a phy_interrupt indicating phy link + * down status, call the MPSetPhyComa routine to enter this active + * state power saving mode + * -- while in D0-ASPM-PhyLinkDown mode, when there is a phy_interrupt + * indicating linkup status, call the MPDisablePhyComa routine to + * restore JAGCore and gigE PHY + */ +void EnablePhyComa(struct et131x_adapter *pAdapter) +{ + unsigned long lockflags; + PM_CSR_t GlobalPmCSR; + int32_t LoopCounter = 10; + + DBG_ENTER(et131x_dbginfo); + + GlobalPmCSR.value = readl(&pAdapter->CSRAddress->global.pm_csr.value); + + /* Save the GbE PHY speed and duplex modes. Need to restore this + * when cable is plugged back in + */ + pAdapter->PoMgmt.PowerDownSpeed = pAdapter->AiForceSpeed; + pAdapter->PoMgmt.PowerDownDuplex = pAdapter->AiForceDpx; + + /* Stop sending packets. */ + spin_lock_irqsave(&pAdapter->SendHWLock, lockflags); + MP_SET_FLAG(pAdapter, fMP_ADAPTER_LOWER_POWER); + spin_unlock_irqrestore(&pAdapter->SendHWLock, lockflags); + + /* Wait for outstanding Receive packets */ + while ((MP_GET_RCV_REF(pAdapter) != 0) && (LoopCounter-- > 0)) { + mdelay(2); + } + + /* Gate off JAGCore 3 clock domains */ + GlobalPmCSR.bits.pm_sysclk_gate = 0; + GlobalPmCSR.bits.pm_txclk_gate = 0; + GlobalPmCSR.bits.pm_rxclk_gate = 0; + writel(GlobalPmCSR.value, &pAdapter->CSRAddress->global.pm_csr.value); + + /* Program gigE PHY in to Coma mode */ + GlobalPmCSR.bits.pm_phy_sw_coma = 1; + writel(GlobalPmCSR.value, &pAdapter->CSRAddress->global.pm_csr.value); + + DBG_LEAVE(et131x_dbginfo); +} + +/** + * DisablePhyComa - Disable the Phy Coma Mode + * @pAdapter: pointer to our adapter structure + */ +void DisablePhyComa(struct et131x_adapter *pAdapter) +{ + PM_CSR_t GlobalPmCSR; + + DBG_ENTER(et131x_dbginfo); + + GlobalPmCSR.value = readl(&pAdapter->CSRAddress->global.pm_csr.value); + + /* Disable phy_sw_coma register and re-enable JAGCore clocks */ + GlobalPmCSR.bits.pm_sysclk_gate = 1; + GlobalPmCSR.bits.pm_txclk_gate = 1; + GlobalPmCSR.bits.pm_rxclk_gate = 1; + GlobalPmCSR.bits.pm_phy_sw_coma = 0; + writel(GlobalPmCSR.value, &pAdapter->CSRAddress->global.pm_csr.value); + + /* Restore the GbE PHY speed and duplex modes; + * Reset JAGCore; re-configure and initialize JAGCore and gigE PHY + */ + pAdapter->AiForceSpeed = pAdapter->PoMgmt.PowerDownSpeed; + pAdapter->AiForceDpx = pAdapter->PoMgmt.PowerDownDuplex; + + /* Re-initialize the send structures */ + et131x_init_send(pAdapter); + + /* Reset the RFD list and re-start RU */ + et131x_reset_recv(pAdapter); + + /* Bring the device back to the state it was during init prior to + * autonegotiation being complete. This way, when we get the auto-neg + * complete interrupt, we can complete init by calling ConfigMacREGS2. + */ + et131x_soft_reset(pAdapter); + + /* setup et1310 as per the documentation ?? */ + et131x_adapter_setup(pAdapter); + + /* Allow Tx to restart */ + MP_CLEAR_FLAG(pAdapter, fMP_ADAPTER_LOWER_POWER); + + /* Need to re-enable Rx. */ + et131x_rx_dma_enable(pAdapter); + + DBG_LEAVE(et131x_dbginfo); +} + |