[deliverable/linux.git] / drivers / net / ethernet / broadcom / genet / bcmgenet_wol.c

/*
 * Broadcom GENET (Gigabit Ethernet) Wake-on-LAN support
 *
 * Copyright (c) 2014 Broadcom Corporation
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#define pr_fmt(fmt)				"bcmgenet_wol: " fmt

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/sched.h>
#include <linux/types.h>
#include <linux/interrupt.h>
#include <linux/string.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/clk.h>
#include <linux/version.h>
#include <linux/platform_device.h>
#include <net/arp.h>

#include <linux/mii.h>
#include <linux/ethtool.h>
#include <linux/netdevice.h>
#include <linux/inetdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/in.h>
#include <linux/ip.h>
#include <linux/ipv6.h>
#include <linux/phy.h>

#include "bcmgenet.h"

/* ethtool function - get WOL (Wake on LAN) settings, Only Magic Packet
 * Detection is supported through ethtool
 */
void bcmgenet_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
{
	struct bcmgenet_priv *priv = netdev_priv(dev);
	u32 reg;

	wol->supported = WAKE_MAGIC | WAKE_MAGICSECURE;
	wol->wolopts = priv->wolopts;
	memset(wol->sopass, 0, sizeof(wol->sopass));

	if (wol->wolopts & WAKE_MAGICSECURE) {
		reg = bcmgenet_umac_readl(priv, UMAC_MPD_PW_MS);
		put_unaligned_be16(reg, &wol->sopass[0]);
		reg = bcmgenet_umac_readl(priv, UMAC_MPD_PW_LS);
		put_unaligned_be32(reg, &wol->sopass[2]);
	}
}

/* ethtool function - set WOL (Wake on LAN) settings.
 * Only for magic packet detection mode.
 */
int bcmgenet_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
{
	struct bcmgenet_priv *priv = netdev_priv(dev);
	struct device *kdev = &priv->pdev->dev;
	u32 reg;

	if (!device_can_wakeup(kdev))
		return -ENOTSUPP;

	if (wol->wolopts & ~(WAKE_MAGIC | WAKE_MAGICSECURE))
		return -EINVAL;

	reg = bcmgenet_umac_readl(priv, UMAC_MPD_CTRL);
	if (wol->wolopts & WAKE_MAGICSECURE) {
		bcmgenet_umac_writel(priv, get_unaligned_be16(&wol->sopass[0]),
				     UMAC_MPD_PW_MS);
		bcmgenet_umac_writel(priv, get_unaligned_be32(&wol->sopass[2]),
				     UMAC_MPD_PW_LS);
		reg |= MPD_PW_EN;
	} else {
		reg &= ~MPD_PW_EN;
	}
	bcmgenet_umac_writel(priv, reg, UMAC_MPD_CTRL);

	/* Flag the device and relevant IRQ as wakeup capable */
	if (wol->wolopts) {
		device_set_wakeup_enable(kdev, 1);
		/* Avoid unbalanced enable_irq_wake calls */
		if (priv->wol_irq_disabled)
			enable_irq_wake(priv->wol_irq);
		priv->wol_irq_disabled = false;
	} else {
		device_set_wakeup_enable(kdev, 0);
		/* Avoid unbalanced disable_irq_wake calls */
		if (!priv->wol_irq_disabled)
			disable_irq_wake(priv->wol_irq);
		priv->wol_irq_disabled = true;
	}

	priv->wolopts = wol->wolopts;

	return 0;
}

static int bcmgenet_poll_wol_status(struct bcmgenet_priv *priv)
{
	struct net_device *dev = priv->dev;
	int retries = 0;

	while (!(bcmgenet_rbuf_readl(priv, RBUF_STATUS)
		& RBUF_STATUS_WOL)) {
		retries++;
		if (retries > 5) {
			netdev_crit(dev, "polling wol mode timeout\n");
			return -ETIMEDOUT;
		}
		mdelay(1);
	}

	return retries;
}

int bcmgenet_wol_power_down_cfg(struct bcmgenet_priv *priv,
				enum bcmgenet_power_mode mode)
{
	struct net_device *dev = priv->dev;
	u32 cpu_mask_clear;
	int retries = 0;
	u32 reg;

	if (mode != GENET_POWER_WOL_MAGIC) {
		netif_err(priv, wol, dev, "unsupported mode: %d\n", mode);
		return -EINVAL;
	}

	/* disable RX */
	reg = bcmgenet_umac_readl(priv, UMAC_CMD);
	reg &= ~CMD_RX_EN;
	bcmgenet_umac_writel(priv, reg, UMAC_CMD);
	mdelay(10);

	reg = bcmgenet_umac_readl(priv, UMAC_MPD_CTRL);
	reg |= MPD_EN;
	bcmgenet_umac_writel(priv, reg, UMAC_MPD_CTRL);

	/* Do not leave UniMAC in MPD mode only */
	retries = bcmgenet_poll_wol_status(priv);
	if (retries < 0) {
		reg = bcmgenet_umac_readl(priv, UMAC_MPD_CTRL);
		reg &= ~MPD_EN;
		bcmgenet_umac_writel(priv, reg, UMAC_MPD_CTRL);
		return retries;
	}

	netif_dbg(priv, wol, dev, "MPD WOL-ready status set after %d msec\n",
		  retries);

	/* Enable CRC forward */
	reg = bcmgenet_umac_readl(priv, UMAC_CMD);
	priv->crc_fwd_en = 1;
	reg |= CMD_CRC_FWD;

	/* Receiver must be enabled for WOL MP detection */
	reg |= CMD_RX_EN;
	bcmgenet_umac_writel(priv, reg, UMAC_CMD);

	if (priv->hw_params->flags & GENET_HAS_EXT) {
		reg = bcmgenet_ext_readl(priv, EXT_EXT_PWR_MGMT);
		reg &= ~EXT_ENERGY_DET_MASK;
		bcmgenet_ext_writel(priv, reg, EXT_EXT_PWR_MGMT);
	}

	/* Enable the MPD interrupt */
	cpu_mask_clear = UMAC_IRQ_MPD_R;

	bcmgenet_intrl2_0_writel(priv, cpu_mask_clear, INTRL2_CPU_MASK_CLEAR);

	return 0;
}

void bcmgenet_wol_power_up_cfg(struct bcmgenet_priv *priv,
			       enum bcmgenet_power_mode mode)
{
	u32 cpu_mask_set;
	u32 reg;

	if (mode != GENET_POWER_WOL_MAGIC) {
		netif_err(priv, wol, priv->dev, "invalid mode: %d\n", mode);
		return;
	}

	reg = bcmgenet_umac_readl(priv, UMAC_MPD_CTRL);
	reg &= ~MPD_EN;
	bcmgenet_umac_writel(priv, reg, UMAC_MPD_CTRL);

	/* Disable CRC Forward */
	reg = bcmgenet_umac_readl(priv, UMAC_CMD);
	reg &= ~CMD_CRC_FWD;
	bcmgenet_umac_writel(priv, reg, UMAC_CMD);
	priv->crc_fwd_en = 0;

	/* Stop monitoring magic packet IRQ */
	cpu_mask_set = UMAC_IRQ_MPD_R;

	/* Stop monitoring magic packet IRQ */
	bcmgenet_intrl2_0_writel(priv, cpu_mask_set, INTRL2_CPU_MASK_SET);
}
Commit	Line	Data
c51de7f3 FF	1	/*
	2	* Broadcom GENET (Gigabit Ethernet) Wake-on-LAN support
	3	*
	4	* Copyright (c) 2014 Broadcom Corporation
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License version 2 as
	8	* published by the Free Software Foundation.
	9	*/
	10
	11	#define pr_fmt(fmt) "bcmgenet_wol: " fmt
	12
	13	#include <linux/kernel.h>
	14	#include <linux/module.h>
	15	#include <linux/sched.h>
	16	#include <linux/types.h>
	17	#include <linux/interrupt.h>
	18	#include <linux/string.h>
	19	#include <linux/init.h>
	20	#include <linux/errno.h>
	21	#include <linux/delay.h>
	22	#include <linux/pm.h>
	23	#include <linux/clk.h>
	24	#include <linux/version.h>
	25	#include <linux/platform_device.h>
	26	#include <net/arp.h>
	27
	28	#include <linux/mii.h>
	29	#include <linux/ethtool.h>
	30	#include <linux/netdevice.h>
	31	#include <linux/inetdevice.h>
	32	#include <linux/etherdevice.h>
	33	#include <linux/skbuff.h>
	34	#include <linux/in.h>
	35	#include <linux/ip.h>
	36	#include <linux/ipv6.h>
	37	#include <linux/phy.h>
	38
	39	#include "bcmgenet.h"
	40
	41	/* ethtool function - get WOL (Wake on LAN) settings, Only Magic Packet
	42	* Detection is supported through ethtool
	43	*/
	44	void bcmgenet_get_wol(struct net_device dev, struct ethtool_wolinfo wol)
	45	{
	46	struct bcmgenet_priv *priv = netdev_priv(dev);
	47	u32 reg;
	48
	49	wol->supported = WAKE_MAGIC \| WAKE_MAGICSECURE;
	50	wol->wolopts = priv->wolopts;
	51	memset(wol->sopass, 0, sizeof(wol->sopass));
	52
	53	if (wol->wolopts & WAKE_MAGICSECURE) {
	54	reg = bcmgenet_umac_readl(priv, UMAC_MPD_PW_MS);
	55	put_unaligned_be16(reg, &wol->sopass[0]);
	56	reg = bcmgenet_umac_readl(priv, UMAC_MPD_PW_LS);
	57	put_unaligned_be32(reg, &wol->sopass[2]);
	58	}
	59	}
	60
	61	/* ethtool function - set WOL (Wake on LAN) settings.
	62	* Only for magic packet detection mode.
	63	*/
	64	int bcmgenet_set_wol(struct net_device dev, struct ethtool_wolinfo wol)
65	{
66	struct bcmgenet_priv *priv = netdev_priv(dev);
67	struct device *kdev = &priv->pdev->dev;
68	u32 reg;
69
70	if (!device_can_wakeup(kdev))
71	return -ENOTSUPP;
72
73	if (wol->wolopts & ~(WAKE_MAGIC \| WAKE_MAGICSECURE))
74	return -EINVAL;
75
386668a6	76	reg = bcmgenet_umac_readl(priv, UMAC_MPD_CTRL);
c51de7f3 FF	77	if (wol->wolopts & WAKE_MAGICSECURE) {
	78	bcmgenet_umac_writel(priv, get_unaligned_be16(&wol->sopass[0]),
	79	UMAC_MPD_PW_MS);
	80	bcmgenet_umac_writel(priv, get_unaligned_be32(&wol->sopass[2]),
	81	UMAC_MPD_PW_LS);
c51de7f3	82	reg \|= MPD_PW_EN;
386668a6 FF	83	} else {
386668a6 FF	84	reg &= ~MPD_PW_EN;
c51de7f3	85	}
386668a6	86	bcmgenet_umac_writel(priv, reg, UMAC_MPD_CTRL);
c51de7f3 FF	87
	88	/* Flag the device and relevant IRQ as wakeup capable */
	89	if (wol->wolopts) {
	90	device_set_wakeup_enable(kdev, 1);
083731a8 FF	91	/* Avoid unbalanced enable_irq_wake calls */
	92	if (priv->wol_irq_disabled)
	93	enable_irq_wake(priv->wol_irq);
c51de7f3 FF	94	priv->wol_irq_disabled = false;
	95	} else {
	96	device_set_wakeup_enable(kdev, 0);
	97	/* Avoid unbalanced disable_irq_wake calls */
	98	if (!priv->wol_irq_disabled)
	99	disable_irq_wake(priv->wol_irq);
	100	priv->wol_irq_disabled = true;
	101	}
	102
	103	priv->wolopts = wol->wolopts;
	104
	105	return 0;
	106	}
	107
	108	static int bcmgenet_poll_wol_status(struct bcmgenet_priv *priv)
	109	{
	110	struct net_device *dev = priv->dev;
	111	int retries = 0;
	112
	113	while (!(bcmgenet_rbuf_readl(priv, RBUF_STATUS)
	114	& RBUF_STATUS_WOL)) {
	115	retries++;
	116	if (retries > 5) {
	117	netdev_crit(dev, "polling wol mode timeout\n");
	118	return -ETIMEDOUT;
	119	}
	120	mdelay(1);
	121	}
	122
	123	return retries;
	124	}
	125
	126	int bcmgenet_wol_power_down_cfg(struct bcmgenet_priv *priv,
	127	enum bcmgenet_power_mode mode)
	128	{
	129	struct net_device *dev = priv->dev;
	130	u32 cpu_mask_clear;
	131	int retries = 0;
	132	u32 reg;
	133
	134	if (mode != GENET_POWER_WOL_MAGIC) {
	135	netif_err(priv, wol, dev, "unsupported mode: %d\n", mode);
	136	return -EINVAL;
	137	}
	138
	139	/* disable RX */
	140	reg = bcmgenet_umac_readl(priv, UMAC_CMD);
	141	reg &= ~CMD_RX_EN;
	142	bcmgenet_umac_writel(priv, reg, UMAC_CMD);
	143	mdelay(10);
	144
	145	reg = bcmgenet_umac_readl(priv, UMAC_MPD_CTRL);
	146	reg \|= MPD_EN;
	147	bcmgenet_umac_writel(priv, reg, UMAC_MPD_CTRL);
	148
	149	/* Do not leave UniMAC in MPD mode only */
	150	retries = bcmgenet_poll_wol_status(priv);
	151	if (retries < 0) {
	152	reg = bcmgenet_umac_readl(priv, UMAC_MPD_CTRL);
	153	reg &= ~MPD_EN;
	154	bcmgenet_umac_writel(priv, reg, UMAC_MPD_CTRL);
	155	return retries;
	156	}
	157
158	netif_dbg(priv, wol, dev, "MPD WOL-ready status set after %d msec\n",
159	retries);
160
161	/* Enable CRC forward */
162	reg = bcmgenet_umac_readl(priv, UMAC_CMD);
163	priv->crc_fwd_en = 1;
164	reg \|= CMD_CRC_FWD;
165
166	/* Receiver must be enabled for WOL MP detection */
167	reg \|= CMD_RX_EN;
168	bcmgenet_umac_writel(priv, reg, UMAC_CMD);
169
170	if (priv->hw_params->flags & GENET_HAS_EXT) {
171	reg = bcmgenet_ext_readl(priv, EXT_EXT_PWR_MGMT);
172	reg &= ~EXT_ENERGY_DET_MASK;
173	bcmgenet_ext_writel(priv, reg, EXT_EXT_PWR_MGMT);
174	}
175
176	/* Enable the MPD interrupt */
177	cpu_mask_clear = UMAC_IRQ_MPD_R;
178
179	bcmgenet_intrl2_0_writel(priv, cpu_mask_clear, INTRL2_CPU_MASK_CLEAR);
180
181	return 0;
182	}
183
184	void bcmgenet_wol_power_up_cfg(struct bcmgenet_priv *priv,
185	enum bcmgenet_power_mode mode)
186	{
187	u32 cpu_mask_set;
188	u32 reg;
189
190	if (mode != GENET_POWER_WOL_MAGIC) {
191	netif_err(priv, wol, priv->dev, "invalid mode: %d\n", mode);
192	return;
193	}
194
195	reg = bcmgenet_umac_readl(priv, UMAC_MPD_CTRL);
196	reg &= ~MPD_EN;
197	bcmgenet_umac_writel(priv, reg, UMAC_MPD_CTRL);
198
199	/* Disable CRC Forward */
200	reg = bcmgenet_umac_readl(priv, UMAC_CMD);
201	reg &= ~CMD_CRC_FWD;
202	bcmgenet_umac_writel(priv, reg, UMAC_CMD);
203	priv->crc_fwd_en = 0;
204
205	/* Stop monitoring magic packet IRQ */
206	cpu_mask_set = UMAC_IRQ_MPD_R;
207
208	/* Stop monitoring magic packet IRQ */
209	bcmgenet_intrl2_0_writel(priv, cpu_mask_set, INTRL2_CPU_MASK_SET);
210	}