1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Broadcom GENET (Gigabit Ethernet) Wake-on-LAN support
*
* Copyright (c) 2014-2020 Broadcom
*/
#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);
wol->supported = WAKE_MAGIC | WAKE_MAGICSECURE | WAKE_FILTER;
wol->wolopts = priv->wolopts;
memset(wol->sopass, 0, sizeof(wol->sopass));
if (wol->wolopts & WAKE_MAGICSECURE)
memcpy(wol->sopass, priv->sopass, sizeof(priv->sopass));
}
/* 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;
if (!device_can_wakeup(kdev))
return -ENOTSUPP;
if (wol->wolopts & ~(WAKE_MAGIC | WAKE_MAGICSECURE | WAKE_FILTER))
return -EINVAL;
if (wol->wolopts & WAKE_MAGICSECURE)
memcpy(priv->sopass, wol->sopass, sizeof(priv->sopass));
/* 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;
}
static void bcmgenet_set_mpd_password(struct bcmgenet_priv *priv)
{
bcmgenet_umac_writel(priv, get_unaligned_be16(&priv->sopass[0]),
UMAC_MPD_PW_MS);
bcmgenet_umac_writel(priv, get_unaligned_be32(&priv->sopass[2]),
UMAC_MPD_PW_LS);
}
int bcmgenet_wol_power_down_cfg(struct bcmgenet_priv *priv,
enum bcmgenet_power_mode mode)
{
struct net_device *dev = priv->dev;
struct bcmgenet_rxnfc_rule *rule;
u32 reg, hfb_ctrl_reg, hfb_enable = 0;
int retries = 0;
if (mode != GENET_POWER_WOL_MAGIC) {
netif_err(priv, wol, dev, "unsupported mode: %d\n", mode);
return -EINVAL;
}
/* Can't suspend with WoL if MAC is still in reset */
reg = bcmgenet_umac_readl(priv, UMAC_CMD);
if (reg & CMD_SW_RESET)
reg &= ~CMD_SW_RESET;
/* disable RX */
reg &= ~CMD_RX_EN;
bcmgenet_umac_writel(priv, reg, UMAC_CMD);
mdelay(10);
if (priv->wolopts & (WAKE_MAGIC | WAKE_MAGICSECURE)) {
reg = bcmgenet_umac_readl(priv, UMAC_MPD_CTRL);
reg |= MPD_EN;
if (priv->wolopts & WAKE_MAGICSECURE) {
bcmgenet_set_mpd_password(priv);
reg |= MPD_PW_EN;
}
bcmgenet_umac_writel(priv, reg, UMAC_MPD_CTRL);
}
hfb_ctrl_reg = bcmgenet_hfb_reg_readl(priv, HFB_CTRL);
if (priv->wolopts & WAKE_FILTER) {
list_for_each_entry(rule, &priv->rxnfc_list, list)
if (rule->fs.ring_cookie == RX_CLS_FLOW_WAKE)
hfb_enable |= (1 << rule->fs.location);
reg = (hfb_ctrl_reg & ~RBUF_HFB_EN) | RBUF_ACPI_EN;
bcmgenet_hfb_reg_writel(priv, reg, HFB_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 | MPD_PW_EN);
bcmgenet_umac_writel(priv, reg, UMAC_MPD_CTRL);
bcmgenet_hfb_reg_writel(priv, hfb_ctrl_reg, HFB_CTRL);
return retries;
}
netif_dbg(priv, wol, dev, "MPD WOL-ready status set after %d msec\n",
retries);
clk_prepare_enable(priv->clk_wol);
priv->wol_active = 1;
if (hfb_enable) {
bcmgenet_hfb_reg_writel(priv, hfb_enable,
HFB_FLT_ENABLE_V3PLUS + 4);
hfb_ctrl_reg = RBUF_HFB_EN | RBUF_ACPI_EN;
bcmgenet_hfb_reg_writel(priv, hfb_ctrl_reg, HFB_CTRL);
}
/* 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);
}
reg = UMAC_IRQ_MPD_R;
if (hfb_enable)
reg |= UMAC_IRQ_HFB_SM | UMAC_IRQ_HFB_MM;
bcmgenet_intrl2_0_writel(priv, reg, INTRL2_CPU_MASK_CLEAR);
return 0;
}
void bcmgenet_wol_power_up_cfg(struct bcmgenet_priv *priv,
enum bcmgenet_power_mode mode)
{
u32 reg;
if (mode != GENET_POWER_WOL_MAGIC) {
netif_err(priv, wol, priv->dev, "invalid mode: %d\n", mode);
return;
}
if (!priv->wol_active)
return; /* failed to suspend so skip the rest */
priv->wol_active = 0;
clk_disable_unprepare(priv->clk_wol);
priv->crc_fwd_en = 0;
/* Disable Magic Packet Detection */
if (priv->wolopts & (WAKE_MAGIC | WAKE_MAGICSECURE)) {
reg = bcmgenet_umac_readl(priv, UMAC_MPD_CTRL);
if (!(reg & MPD_EN))
return; /* already reset so skip the rest */
reg &= ~(MPD_EN | MPD_PW_EN);
bcmgenet_umac_writel(priv, reg, UMAC_MPD_CTRL);
}
/* Disable WAKE_FILTER Detection */
if (priv->wolopts & WAKE_FILTER) {
reg = bcmgenet_hfb_reg_readl(priv, HFB_CTRL);
if (!(reg & RBUF_ACPI_EN))
return; /* already reset so skip the rest */
reg &= ~(RBUF_HFB_EN | RBUF_ACPI_EN);
bcmgenet_hfb_reg_writel(priv, reg, HFB_CTRL);
}
/* Disable CRC Forward */
reg = bcmgenet_umac_readl(priv, UMAC_CMD);
reg &= ~CMD_CRC_FWD;
bcmgenet_umac_writel(priv, reg, UMAC_CMD);
}
|
