lan743x: Add power management support
Implement power management Supports suspend, resume, and Wake on LAN Signed-off-by: Bryan Whitehead <Bryan.Whitehead@microchip.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Bryan Whitehead
committed by
David S. Miller
David S. Miller
parent
695846047a
commit
4d94282afd
@@ -11,6 +11,7 @@
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#include <linux/phy.h>
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#include <linux/rtnetlink.h>
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#include <linux/iopoll.h>
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#include <linux/crc16.h>
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#include "lan743x_main.h"
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#include "lan743x_ethtool.h"
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@@ -2749,10 +2750,182 @@ static void lan743x_pcidev_shutdown(struct pci_dev *pdev)
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lan743x_netdev_close(netdev);
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rtnl_unlock();
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#ifdef CONFIG_PM
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pci_save_state(pdev);
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#endif
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/* clean up lan743x portion */
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lan743x_hardware_cleanup(adapter);
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}
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#ifdef CONFIG_PM
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static u16 lan743x_pm_wakeframe_crc16(const u8 *buf, int len)
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{
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return bitrev16(crc16(0xFFFF, buf, len));
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}
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static void lan743x_pm_set_wol(struct lan743x_adapter *adapter)
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{
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const u8 ipv4_multicast[3] = { 0x01, 0x00, 0x5E };
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const u8 ipv6_multicast[3] = { 0x33, 0x33 };
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const u8 arp_type[2] = { 0x08, 0x06 };
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int mask_index;
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u32 pmtctl;
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u32 wucsr;
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u32 macrx;
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u16 crc;
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for (mask_index = 0; mask_index < MAC_NUM_OF_WUF_CFG; mask_index++)
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lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index), 0);
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/* clear wake settings */
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pmtctl = lan743x_csr_read(adapter, PMT_CTL);
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pmtctl |= PMT_CTL_WUPS_MASK_;
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pmtctl &= ~(PMT_CTL_GPIO_WAKEUP_EN_ | PMT_CTL_EEE_WAKEUP_EN_ |
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PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_ |
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PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_ | PMT_CTL_ETH_PHY_WAKE_EN_);
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macrx = lan743x_csr_read(adapter, MAC_RX);
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wucsr = 0;
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mask_index = 0;
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pmtctl |= PMT_CTL_ETH_PHY_D3_COLD_OVR_ | PMT_CTL_ETH_PHY_D3_OVR_;
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if (adapter->wolopts & WAKE_PHY) {
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pmtctl |= PMT_CTL_ETH_PHY_EDPD_PLL_CTL_;
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pmtctl |= PMT_CTL_ETH_PHY_WAKE_EN_;
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}
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if (adapter->wolopts & WAKE_MAGIC) {
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wucsr |= MAC_WUCSR_MPEN_;
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macrx |= MAC_RX_RXEN_;
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pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
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}
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if (adapter->wolopts & WAKE_UCAST) {
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wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_PFDA_EN_;
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macrx |= MAC_RX_RXEN_;
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pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
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pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
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}
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if (adapter->wolopts & WAKE_BCAST) {
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wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_BCST_EN_;
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macrx |= MAC_RX_RXEN_;
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pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
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pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
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}
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if (adapter->wolopts & WAKE_MCAST) {
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/* IPv4 multicast */
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crc = lan743x_pm_wakeframe_crc16(ipv4_multicast, 3);
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lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index),
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MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_MCAST_ |
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(0 << MAC_WUF_CFG_OFFSET_SHIFT_) |
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(crc & MAC_WUF_CFG_CRC16_MASK_));
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lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 7);
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lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0);
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lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0);
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lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0);
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mask_index++;
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/* IPv6 multicast */
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crc = lan743x_pm_wakeframe_crc16(ipv6_multicast, 2);
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lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index),
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MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_MCAST_ |
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(0 << MAC_WUF_CFG_OFFSET_SHIFT_) |
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(crc & MAC_WUF_CFG_CRC16_MASK_));
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lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 3);
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lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0);
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lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0);
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lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0);
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mask_index++;
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wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_WAKE_EN_;
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macrx |= MAC_RX_RXEN_;
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pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
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pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
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}
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if (adapter->wolopts & WAKE_ARP) {
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/* set MAC_WUF_CFG & WUF_MASK
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* for packettype (offset 12,13) = ARP (0x0806)
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*/
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crc = lan743x_pm_wakeframe_crc16(arp_type, 2);
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lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index),
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MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_ALL_ |
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(0 << MAC_WUF_CFG_OFFSET_SHIFT_) |
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(crc & MAC_WUF_CFG_CRC16_MASK_));
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lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 0x3000);
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lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0);
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lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0);
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lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0);
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mask_index++;
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wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_WAKE_EN_;
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macrx |= MAC_RX_RXEN_;
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pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_;
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pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_;
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}
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lan743x_csr_write(adapter, MAC_WUCSR, wucsr);
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lan743x_csr_write(adapter, PMT_CTL, pmtctl);
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lan743x_csr_write(adapter, MAC_RX, macrx);
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}
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static int lan743x_pm_suspend(struct device *dev)
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{
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struct pci_dev *pdev = to_pci_dev(dev);
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struct net_device *netdev = pci_get_drvdata(pdev);
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struct lan743x_adapter *adapter = netdev_priv(netdev);
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int ret;
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lan743x_pcidev_shutdown(pdev);
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/* clear all wakes */
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lan743x_csr_write(adapter, MAC_WUCSR, 0);
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lan743x_csr_write(adapter, MAC_WUCSR2, 0);
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lan743x_csr_write(adapter, MAC_WK_SRC, 0xFFFFFFFF);
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if (adapter->wolopts)
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lan743x_pm_set_wol(adapter);
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/* Host sets PME_En, put D3hot */
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ret = pci_prepare_to_sleep(pdev);
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return 0;
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}
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static int lan743x_pm_resume(struct device *dev)
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{
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struct pci_dev *pdev = to_pci_dev(dev);
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struct net_device *netdev = pci_get_drvdata(pdev);
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struct lan743x_adapter *adapter = netdev_priv(netdev);
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int ret;
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pci_set_power_state(pdev, PCI_D0);
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pci_restore_state(pdev);
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pci_save_state(pdev);
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ret = lan743x_hardware_init(adapter, pdev);
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if (ret) {
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netif_err(adapter, probe, adapter->netdev,
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"lan743x_hardware_init returned %d\n", ret);
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}
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/* open netdev when netdev is at running state while resume.
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* For instance, it is true when system wakesup after pm-suspend
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* However, it is false when system wakes up after suspend GUI menu
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*/
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if (netif_running(netdev))
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lan743x_netdev_open(netdev);
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netif_device_attach(netdev);
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return 0;
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}
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const struct dev_pm_ops lan743x_pm_ops = {
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SET_SYSTEM_SLEEP_PM_OPS(lan743x_pm_suspend, lan743x_pm_resume)
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};
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#endif /*CONFIG_PM */
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static const struct pci_device_id lan743x_pcidev_tbl[] = {
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{ PCI_DEVICE(PCI_VENDOR_ID_SMSC, PCI_DEVICE_ID_SMSC_LAN7430) },
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{ 0, }
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@@ -2763,6 +2936,9 @@ static struct pci_driver lan743x_pcidev_driver = {
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.id_table = lan743x_pcidev_tbl,
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.probe = lan743x_pcidev_probe,
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.remove = lan743x_pcidev_remove,
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#ifdef CONFIG_PM
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.driver.pm = &lan743x_pm_ops,
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#endif
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.shutdown = lan743x_pcidev_shutdown,
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};
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