Merge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[linux-2.6-microblaze.git] / drivers / net / ethernet / broadcom / genet / bcmgenet_wol.c
1 /*
2  * Broadcom GENET (Gigabit Ethernet) Wake-on-LAN support
3  *
4  * Copyright (c) 2014-2017 Broadcom
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
76         reg = bcmgenet_umac_readl(priv, UMAC_MPD_CTRL);
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);
82                 reg |= MPD_PW_EN;
83         } else {
84                 reg &= ~MPD_PW_EN;
85         }
86         bcmgenet_umac_writel(priv, reg, UMAC_MPD_CTRL);
87
88         /* Flag the device and relevant IRQ as wakeup capable */
89         if (wol->wolopts) {
90                 device_set_wakeup_enable(kdev, 1);
91                 /* Avoid unbalanced enable_irq_wake calls */
92                 if (priv->wol_irq_disabled)
93                         enable_irq_wake(priv->wol_irq);
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         int retries = 0;
131         u32 reg;
132
133         if (mode != GENET_POWER_WOL_MAGIC) {
134                 netif_err(priv, wol, dev, "unsupported mode: %d\n", mode);
135                 return -EINVAL;
136         }
137
138         /* disable RX */
139         reg = bcmgenet_umac_readl(priv, UMAC_CMD);
140         reg &= ~CMD_RX_EN;
141         bcmgenet_umac_writel(priv, reg, UMAC_CMD);
142         mdelay(10);
143
144         reg = bcmgenet_umac_readl(priv, UMAC_MPD_CTRL);
145         reg |= MPD_EN;
146         bcmgenet_umac_writel(priv, reg, UMAC_MPD_CTRL);
147
148         /* Do not leave UniMAC in MPD mode only */
149         retries = bcmgenet_poll_wol_status(priv);
150         if (retries < 0) {
151                 reg = bcmgenet_umac_readl(priv, UMAC_MPD_CTRL);
152                 reg &= ~MPD_EN;
153                 bcmgenet_umac_writel(priv, reg, UMAC_MPD_CTRL);
154                 return retries;
155         }
156
157         netif_dbg(priv, wol, dev, "MPD WOL-ready status set after %d msec\n",
158                   retries);
159
160         /* Enable CRC forward */
161         reg = bcmgenet_umac_readl(priv, UMAC_CMD);
162         priv->crc_fwd_en = 1;
163         reg |= CMD_CRC_FWD;
164
165         /* Receiver must be enabled for WOL MP detection */
166         reg |= CMD_RX_EN;
167         bcmgenet_umac_writel(priv, reg, UMAC_CMD);
168
169         if (priv->hw_params->flags & GENET_HAS_EXT) {
170                 reg = bcmgenet_ext_readl(priv, EXT_EXT_PWR_MGMT);
171                 reg &= ~EXT_ENERGY_DET_MASK;
172                 bcmgenet_ext_writel(priv, reg, EXT_EXT_PWR_MGMT);
173         }
174
175         return 0;
176 }
177
178 void bcmgenet_wol_power_up_cfg(struct bcmgenet_priv *priv,
179                                enum bcmgenet_power_mode mode)
180 {
181         u32 reg;
182
183         if (mode != GENET_POWER_WOL_MAGIC) {
184                 netif_err(priv, wol, priv->dev, "invalid mode: %d\n", mode);
185                 return;
186         }
187
188         reg = bcmgenet_umac_readl(priv, UMAC_MPD_CTRL);
189         reg &= ~MPD_EN;
190         bcmgenet_umac_writel(priv, reg, UMAC_MPD_CTRL);
191
192         /* Disable CRC Forward */
193         reg = bcmgenet_umac_readl(priv, UMAC_CMD);
194         reg &= ~CMD_CRC_FWD;
195         bcmgenet_umac_writel(priv, reg, UMAC_CMD);
196         priv->crc_fwd_en = 0;
197 }