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Commit 899a391b authored by Steve Glendinning's avatar Steve Glendinning Committed by David S. Miller
Browse files

smsc75xx: add wol support for more frame types 



This patch adds support for wol wakeup on unicast, broadcast,
multicast and arp frames.

Signed-off-by: default avatarSteve Glendinning <steve.glendinning@shawell.net>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 4f99ad51

drivers/net/usb/Kconfig

+2 −0
Original line number Diff line number Diff line
@@ -248,6 +248,8 @@ config USB_NET_DM9601 
config USB_NET_SMSC75XX

	tristate "SMSC LAN75XX based USB 2.0 gigabit ethernet devices"

	depends on USB_USBNET

	select BITREVERSE

	select CRC16

	select CRC32

	help

	  This option adds support for SMSC LAN95XX based USB 2.0

drivers/net/usb/smsc75xx.c

+122 −33
Original line number Diff line number Diff line
@@ -26,6 +26,8 @@ 
#include <linux/ethtool.h>

#include <linux/mii.h>

#include <linux/usb.h>

#include <linux/bitrev.h>

#include <linux/crc16.h>

#include <linux/crc32.h>

#include <linux/usb/usbnet.h>

#include <linux/slab.h>
@@ -52,7 +54,8 @@ 
#define USB_PRODUCT_ID_LAN7500		(0x7500)

#define USB_PRODUCT_ID_LAN7505		(0x7505)

#define RXW_PADDING			2

#define SUPPORTED_WAKE			(WAKE_MAGIC)

#define SUPPORTED_WAKE			(WAKE_UCAST | WAKE_BCAST | \

					 WAKE_MCAST | WAKE_ARP | WAKE_MAGIC)



#define check_warn(ret, fmt, args...) \

	({ if (ret < 0) netdev_warn(dev->net, fmt, ##args); })
@@ -1143,6 +1146,36 @@ static void smsc75xx_unbind(struct usbnet *dev, struct usb_interface *intf) 
	}

}



static u16 smsc_crc(const u8 *buffer, size_t len)

{

	return bitrev16(crc16(0xFFFF, buffer, len));

}



static int smsc75xx_write_wuff(struct usbnet *dev, int filter, u32 wuf_cfg,

			       u32 wuf_mask1)

{

	int cfg_base = WUF_CFGX + filter * 4;

	int mask_base = WUF_MASKX + filter * 16;

	int ret;



	ret = smsc75xx_write_reg(dev, cfg_base, wuf_cfg);

	check_warn_return(ret, "Error writing WUF_CFGX");



	ret = smsc75xx_write_reg(dev, mask_base, wuf_mask1);

	check_warn_return(ret, "Error writing WUF_MASKX");



	ret = smsc75xx_write_reg(dev, mask_base + 4, 0);

	check_warn_return(ret, "Error writing WUF_MASKX");



	ret = smsc75xx_write_reg(dev, mask_base + 8, 0);

	check_warn_return(ret, "Error writing WUF_MASKX");



	ret = smsc75xx_write_reg(dev, mask_base + 12, 0);

	check_warn_return(ret, "Error writing WUF_MASKX");



	return 0;

}



static int smsc75xx_suspend(struct usb_interface *intf, pm_message_t message)

{

	struct usbnet *dev = usb_get_intfdata(intf);
@@ -1187,42 +1220,107 @@ static int smsc75xx_suspend(struct usb_interface *intf, pm_message_t message) 
		return 0;

	}



	if (pdata->wolopts & WAKE_MAGIC) {

		/* clear any pending magic packet status */

	if (pdata->wolopts & (WAKE_MCAST | WAKE_ARP)) {

		int i, filter = 0;



		/* disable all filters */

		for (i = 0; i < WUF_NUM; i++) {

			ret = smsc75xx_write_reg(dev, WUF_CFGX + i * 4, 0);

			check_warn_return(ret, "Error writing WUF_CFGX");

		}



		if (pdata->wolopts & WAKE_MCAST) {

			const u8 mcast[] = {0x01, 0x00, 0x5E};

			netdev_info(dev->net, "enabling multicast detection");



			val = WUF_CFGX_EN | WUF_CFGX_ATYPE_MULTICAST

				| smsc_crc(mcast, 3);

			ret = smsc75xx_write_wuff(dev, filter++, val, 0x0007);

			check_warn_return(ret, "Error writing wakeup filter");

		}



		if (pdata->wolopts & WAKE_ARP) {

			const u8 arp[] = {0x08, 0x06};

			netdev_info(dev->net, "enabling ARP detection");



			val = WUF_CFGX_EN | WUF_CFGX_ATYPE_ALL | (0x0C << 16)

				| smsc_crc(arp, 2);

			ret = smsc75xx_write_wuff(dev, filter++, val, 0x0003);

			check_warn_return(ret, "Error writing wakeup filter");

		}



		/* clear any pending pattern match packet status */

		ret = smsc75xx_read_reg(dev, WUCSR, &val);

		check_warn_return(ret, "Error reading WUCSR");



		val |= WUCSR_WUFR;



		ret = smsc75xx_write_reg(dev, WUCSR, val);

		check_warn_return(ret, "Error writing WUCSR");



		netdev_info(dev->net, "enabling packet match detection");

		ret = smsc75xx_read_reg(dev, WUCSR, &val);

		check_warn_return(ret, "Error reading WUCSR");



		val |= WUCSR_WUEN;



		ret = smsc75xx_write_reg(dev, WUCSR, val);

		check_warn_return(ret, "Error writing WUCSR");

	} else {

		netdev_info(dev->net, "disabling packet match detection");

		ret = smsc75xx_read_reg(dev, WUCSR, &val);

		check_warn_return(ret, "Error reading WUCSR");



		val |= WUCSR_MPR;

		val &= ~WUCSR_WUEN;



		ret = smsc75xx_write_reg(dev, WUCSR, val);

		check_warn_return(ret, "Error writing WUCSR");

	}



	/* enable/disable magic packup wake */

	/* disable magic, bcast & unicast wakeup sources */

	ret = smsc75xx_read_reg(dev, WUCSR, &val);

	check_warn_return(ret, "Error reading WUCSR");



	val &= ~(WUCSR_MPEN | WUCSR_BCST_EN | WUCSR_PFDA_EN);



	ret = smsc75xx_write_reg(dev, WUCSR, val);

	check_warn_return(ret, "Error writing WUCSR");



	if (pdata->wolopts & WAKE_MAGIC) {

		netdev_info(dev->net, "enabling magic packet wakeup");

		val |= WUCSR_MPEN;

	} else {

		netdev_info(dev->net, "disabling magic packet wakeup");

		val &= ~WUCSR_MPEN;

		ret = smsc75xx_read_reg(dev, WUCSR, &val);

		check_warn_return(ret, "Error reading WUCSR");



		/* clear any pending magic packet status */

		val |= WUCSR_MPR | WUCSR_MPEN;



		ret = smsc75xx_write_reg(dev, WUCSR, val);

		check_warn_return(ret, "Error writing WUCSR");

	}



	if (pdata->wolopts & WAKE_BCAST) {

		netdev_info(dev->net, "enabling broadcast detection");

		ret = smsc75xx_read_reg(dev, WUCSR, &val);

		check_warn_return(ret, "Error reading WUCSR");



		val |= WUCSR_BCAST_FR | WUCSR_BCST_EN;



		ret = smsc75xx_write_reg(dev, WUCSR, val);

		check_warn_return(ret, "Error writing WUCSR");

	}



	/* enable wol wakeup source */

	ret = smsc75xx_read_reg(dev, PMT_CTL, &val);

	check_warn_return(ret, "Error reading PMT_CTL");

	if (pdata->wolopts & WAKE_UCAST) {

		netdev_info(dev->net, "enabling unicast detection");

		ret = smsc75xx_read_reg(dev, WUCSR, &val);

		check_warn_return(ret, "Error reading WUCSR");



	val |= PMT_CTL_WOL_EN;

		val |= WUCSR_WUFR | WUCSR_PFDA_EN;



	ret = smsc75xx_write_reg(dev, PMT_CTL, val);

	check_warn_return(ret, "Error writing PMT_CTL");

		ret = smsc75xx_write_reg(dev, WUCSR, val);

		check_warn_return(ret, "Error writing WUCSR");

	}



	/* enable receiver */

	/* enable receiver to enable frame reception */

	ret = smsc75xx_read_reg(dev, MAC_RX, &val);

	check_warn_return(ret, "Failed to read MAC_RX: %d", ret);
@@ -1237,22 +1335,12 @@ static int smsc75xx_suspend(struct usb_interface *intf, pm_message_t message) 
	ret = smsc75xx_read_reg(dev, PMT_CTL, &val);

	check_warn_return(ret, "Error reading PMT_CTL");



	val &= (~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST));

	val |= PMT_CTL_SUS_MODE_0;



	ret = smsc75xx_write_reg(dev, PMT_CTL, val);

	check_warn_return(ret, "Error writing PMT_CTL");

	val &= (~(PMT_CTL_SUS_MODE | PMT_CTL_PHY_RST));

	val |= PMT_CTL_SUS_MODE_0 | PMT_CTL_WOL_EN | PMT_CTL_WUPS;



	/* clear wol status */

	val &= ~PMT_CTL_WUPS;

	val |= PMT_CTL_WUPS_WOL;

	ret = smsc75xx_write_reg(dev, PMT_CTL, val);

	check_warn_return(ret, "Error writing PMT_CTL");



	/* read back PMT_CTL */

	ret = smsc75xx_read_reg(dev, PMT_CTL, &val);

	check_warn_return(ret, "Error reading PMT_CTL");



	smsc75xx_set_feature(dev, USB_DEVICE_REMOTE_WAKEUP);



	return 0;
@@ -1265,16 +1353,17 @@ static int smsc75xx_resume(struct usb_interface *intf) 
	int ret;

	u32 val;



	if (pdata->wolopts & WAKE_MAGIC) {

	if (pdata->wolopts) {

		netdev_info(dev->net, "resuming from SUSPEND0");



		smsc75xx_clear_feature(dev, USB_DEVICE_REMOTE_WAKEUP);



		/* Disable magic packup wake */

		/* Disable wakeup sources */

		ret = smsc75xx_read_reg(dev, WUCSR, &val);

		check_warn_return(ret, "Error reading WUCSR");



		val &= ~WUCSR_MPEN;

		val &= ~(WUCSR_WUEN | WUCSR_MPEN | WUCSR_PFDA_EN

			| WUCSR_BCST_EN);



		ret = smsc75xx_write_reg(dev, WUCSR, val);

		check_warn_return(ret, "Error writing WUCSR");