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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 | ||
76 | if (wol->wolopts & WAKE_MAGICSECURE) { | |
77 | bcmgenet_umac_writel(priv, get_unaligned_be16(&wol->sopass[0]), | |
78 | UMAC_MPD_PW_MS); | |
79 | bcmgenet_umac_writel(priv, get_unaligned_be32(&wol->sopass[2]), | |
80 | UMAC_MPD_PW_LS); | |
81 | reg = bcmgenet_umac_readl(priv, UMAC_MPD_CTRL); | |
82 | reg |= MPD_PW_EN; | |
83 | bcmgenet_umac_writel(priv, reg, UMAC_MPD_CTRL); | |
84 | } | |
85 | ||
86 | /* Flag the device and relevant IRQ as wakeup capable */ | |
87 | if (wol->wolopts) { | |
88 | device_set_wakeup_enable(kdev, 1); | |
083731a8 FF |
89 | /* Avoid unbalanced enable_irq_wake calls */ |
90 | if (priv->wol_irq_disabled) | |
91 | enable_irq_wake(priv->wol_irq); | |
c51de7f3 FF |
92 | priv->wol_irq_disabled = false; |
93 | } else { | |
94 | device_set_wakeup_enable(kdev, 0); | |
95 | /* Avoid unbalanced disable_irq_wake calls */ | |
96 | if (!priv->wol_irq_disabled) | |
97 | disable_irq_wake(priv->wol_irq); | |
98 | priv->wol_irq_disabled = true; | |
99 | } | |
100 | ||
101 | priv->wolopts = wol->wolopts; | |
102 | ||
103 | return 0; | |
104 | } | |
105 | ||
106 | static int bcmgenet_poll_wol_status(struct bcmgenet_priv *priv) | |
107 | { | |
108 | struct net_device *dev = priv->dev; | |
109 | int retries = 0; | |
110 | ||
111 | while (!(bcmgenet_rbuf_readl(priv, RBUF_STATUS) | |
112 | & RBUF_STATUS_WOL)) { | |
113 | retries++; | |
114 | if (retries > 5) { | |
115 | netdev_crit(dev, "polling wol mode timeout\n"); | |
116 | return -ETIMEDOUT; | |
117 | } | |
118 | mdelay(1); | |
119 | } | |
120 | ||
121 | return retries; | |
122 | } | |
123 | ||
124 | int bcmgenet_wol_power_down_cfg(struct bcmgenet_priv *priv, | |
125 | enum bcmgenet_power_mode mode) | |
126 | { | |
127 | struct net_device *dev = priv->dev; | |
128 | u32 cpu_mask_clear; | |
129 | int retries = 0; | |
130 | u32 reg; | |
131 | ||
132 | if (mode != GENET_POWER_WOL_MAGIC) { | |
133 | netif_err(priv, wol, dev, "unsupported mode: %d\n", mode); | |
134 | return -EINVAL; | |
135 | } | |
136 | ||
137 | /* disable RX */ | |
138 | reg = bcmgenet_umac_readl(priv, UMAC_CMD); | |
139 | reg &= ~CMD_RX_EN; | |
140 | bcmgenet_umac_writel(priv, reg, UMAC_CMD); | |
141 | mdelay(10); | |
142 | ||
143 | reg = bcmgenet_umac_readl(priv, UMAC_MPD_CTRL); | |
144 | reg |= MPD_EN; | |
145 | bcmgenet_umac_writel(priv, reg, UMAC_MPD_CTRL); | |
146 | ||
147 | /* Do not leave UniMAC in MPD mode only */ | |
148 | retries = bcmgenet_poll_wol_status(priv); | |
149 | if (retries < 0) { | |
150 | reg = bcmgenet_umac_readl(priv, UMAC_MPD_CTRL); | |
151 | reg &= ~MPD_EN; | |
152 | bcmgenet_umac_writel(priv, reg, UMAC_MPD_CTRL); | |
153 | return retries; | |
154 | } | |
155 | ||
156 | netif_dbg(priv, wol, dev, "MPD WOL-ready status set after %d msec\n", | |
157 | retries); | |
158 | ||
159 | /* Enable CRC forward */ | |
160 | reg = bcmgenet_umac_readl(priv, UMAC_CMD); | |
161 | priv->crc_fwd_en = 1; | |
162 | reg |= CMD_CRC_FWD; | |
163 | ||
164 | /* Receiver must be enabled for WOL MP detection */ | |
165 | reg |= CMD_RX_EN; | |
166 | bcmgenet_umac_writel(priv, reg, UMAC_CMD); | |
167 | ||
168 | if (priv->hw_params->flags & GENET_HAS_EXT) { | |
169 | reg = bcmgenet_ext_readl(priv, EXT_EXT_PWR_MGMT); | |
170 | reg &= ~EXT_ENERGY_DET_MASK; | |
171 | bcmgenet_ext_writel(priv, reg, EXT_EXT_PWR_MGMT); | |
172 | } | |
173 | ||
174 | /* Enable the MPD interrupt */ | |
175 | cpu_mask_clear = UMAC_IRQ_MPD_R; | |
176 | ||
177 | bcmgenet_intrl2_0_writel(priv, cpu_mask_clear, INTRL2_CPU_MASK_CLEAR); | |
178 | ||
179 | return 0; | |
180 | } | |
181 | ||
182 | void bcmgenet_wol_power_up_cfg(struct bcmgenet_priv *priv, | |
183 | enum bcmgenet_power_mode mode) | |
184 | { | |
185 | u32 cpu_mask_set; | |
186 | u32 reg; | |
187 | ||
188 | if (mode != GENET_POWER_WOL_MAGIC) { | |
189 | netif_err(priv, wol, priv->dev, "invalid mode: %d\n", mode); | |
190 | return; | |
191 | } | |
192 | ||
193 | reg = bcmgenet_umac_readl(priv, UMAC_MPD_CTRL); | |
194 | reg &= ~MPD_EN; | |
195 | bcmgenet_umac_writel(priv, reg, UMAC_MPD_CTRL); | |
196 | ||
197 | /* Disable CRC Forward */ | |
198 | reg = bcmgenet_umac_readl(priv, UMAC_CMD); | |
199 | reg &= ~CMD_CRC_FWD; | |
200 | bcmgenet_umac_writel(priv, reg, UMAC_CMD); | |
201 | priv->crc_fwd_en = 0; | |
202 | ||
203 | /* Stop monitoring magic packet IRQ */ | |
204 | cpu_mask_set = UMAC_IRQ_MPD_R; | |
205 | ||
206 | /* Stop monitoring magic packet IRQ */ | |
207 | bcmgenet_intrl2_0_writel(priv, cpu_mask_set, INTRL2_CPU_MASK_SET); | |
208 | } |