summaryrefslogtreecommitdiff
path: root/drivers/net/phy/bcm87xx.c
blob: e81404bf899474f0a716c5dbe283d5aa3a87d83b (plain)
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
// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (C) 2011 - 2012 Cavium, Inc.
 */

#include <linux/module.h>
#include <linux/phy.h>
#include <linux/of.h>

#define PHY_ID_BCM8706	0x0143bdc1
#define PHY_ID_BCM8727	0x0143bff0

#define BCM87XX_PMD_RX_SIGNAL_DETECT	0x000a
#define BCM87XX_10GBASER_PCS_STATUS	0x0020
#define BCM87XX_XGXS_LANE_STATUS	0x0018

#define BCM87XX_LASI_CONTROL		0x9002
#define BCM87XX_LASI_STATUS		0x9005

#if IS_ENABLED(CONFIG_OF_MDIO)
/* Set and/or override some configuration registers based on the
 * broadcom,c45-reg-init property stored in the of_node for the phydev.
 *
 * broadcom,c45-reg-init = <devid reg mask value>,...;
 *
 * There may be one or more sets of <devid reg mask value>:
 *
 * devid: which sub-device to use.
 * reg: the register.
 * mask: if non-zero, ANDed with existing register value.
 * value: ORed with the masked value and written to the regiser.
 *
 */
static int bcm87xx_of_reg_init(struct phy_device *phydev)
{
	const __be32 *paddr;
	const __be32 *paddr_end;
	int len, ret;

	if (!phydev->mdio.dev.of_node)
		return 0;

	paddr = of_get_property(phydev->mdio.dev.of_node,
				"broadcom,c45-reg-init", &len);
	if (!paddr)
		return 0;

	paddr_end = paddr + (len /= sizeof(*paddr));

	ret = 0;

	while (paddr + 3 < paddr_end) {
		u16 devid	= be32_to_cpup(paddr++);
		u16 reg		= be32_to_cpup(paddr++);
		u16 mask	= be32_to_cpup(paddr++);
		u16 val_bits	= be32_to_cpup(paddr++);
		int val = 0;

		if (mask) {
			val = phy_read_mmd(phydev, devid, reg);
			if (val < 0) {
				ret = val;
				goto err;
			}
			val &= mask;
		}
		val |= val_bits;

		ret = phy_write_mmd(phydev, devid, reg, val);
		if (ret < 0)
			goto err;
	}
err:
	return ret;
}
#else
static int bcm87xx_of_reg_init(struct phy_device *phydev)
{
	return 0;
}
#endif /* CONFIG_OF_MDIO */

static int bcm87xx_get_features(struct phy_device *phydev)
{
	linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseR_FEC_BIT,
			 phydev->supported);
	return 0;
}

static int bcm87xx_config_init(struct phy_device *phydev)
{
	return bcm87xx_of_reg_init(phydev);
}

static int bcm87xx_config_aneg(struct phy_device *phydev)
{
	return -EINVAL;
}

static int bcm87xx_read_status(struct phy_device *phydev)
{
	int rx_signal_detect;
	int pcs_status;
	int xgxs_lane_status;

	rx_signal_detect = phy_read_mmd(phydev, MDIO_MMD_PMAPMD,
					BCM87XX_PMD_RX_SIGNAL_DETECT);
	if (rx_signal_detect < 0)
		return rx_signal_detect;

	if ((rx_signal_detect & 1) == 0)
		goto no_link;

	pcs_status = phy_read_mmd(phydev, MDIO_MMD_PCS,
				  BCM87XX_10GBASER_PCS_STATUS);
	if (pcs_status < 0)
		return pcs_status;

	if ((pcs_status & 1) == 0)
		goto no_link;

	xgxs_lane_status = phy_read_mmd(phydev, MDIO_MMD_PHYXS,
					BCM87XX_XGXS_LANE_STATUS);
	if (xgxs_lane_status < 0)
		return xgxs_lane_status;

	if ((xgxs_lane_status & 0x1000) == 0)
		goto no_link;

	phydev->speed = 10000;
	phydev->link = 1;
	phydev->duplex = 1;
	return 0;

no_link:
	phydev->link = 0;
	return 0;
}

static int bcm87xx_config_intr(struct phy_device *phydev)
{
	int reg, err;

	reg = phy_read_mmd(phydev, MDIO_MMD_PCS, BCM87XX_LASI_CONTROL);

	if (reg < 0)
		return reg;

	if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
		err = phy_read_mmd(phydev, MDIO_MMD_PCS, BCM87XX_LASI_STATUS);
		if (err)
			return err;

		reg |= 1;
		err = phy_write_mmd(phydev, MDIO_MMD_PCS,
				    BCM87XX_LASI_CONTROL, reg);
	} else {
		reg &= ~1;
		err = phy_write_mmd(phydev, MDIO_MMD_PCS,
				    BCM87XX_LASI_CONTROL, reg);
		if (err)
			return err;

		err = phy_read_mmd(phydev, MDIO_MMD_PCS, BCM87XX_LASI_STATUS);
	}

	return err;
}

static irqreturn_t bcm87xx_handle_interrupt(struct phy_device *phydev)
{
	int irq_status;

	irq_status = phy_read(phydev, BCM87XX_LASI_STATUS);
	if (irq_status < 0) {
		phy_error(phydev);
		return IRQ_NONE;
	}

	if (irq_status == 0)
		return IRQ_NONE;

	phy_trigger_machine(phydev);

	return IRQ_HANDLED;
}

static int bcm8706_match_phy_device(struct phy_device *phydev)
{
	return phydev->c45_ids.device_ids[4] == PHY_ID_BCM8706;
}

static int bcm8727_match_phy_device(struct phy_device *phydev)
{
	return phydev->c45_ids.device_ids[4] == PHY_ID_BCM8727;
}

static struct phy_driver bcm87xx_driver[] = {
{
	.phy_id		= PHY_ID_BCM8706,
	.phy_id_mask	= 0xffffffff,
	.name		= "Broadcom BCM8706",
	.get_features	= bcm87xx_get_features,
	.config_init	= bcm87xx_config_init,
	.config_aneg	= bcm87xx_config_aneg,
	.read_status	= bcm87xx_read_status,
	.config_intr	= bcm87xx_config_intr,
	.handle_interrupt = bcm87xx_handle_interrupt,
	.match_phy_device = bcm8706_match_phy_device,
}, {
	.phy_id		= PHY_ID_BCM8727,
	.phy_id_mask	= 0xffffffff,
	.name		= "Broadcom BCM8727",
	.get_features	= bcm87xx_get_features,
	.config_init	= bcm87xx_config_init,
	.config_aneg	= bcm87xx_config_aneg,
	.read_status	= bcm87xx_read_status,
	.config_intr	= bcm87xx_config_intr,
	.handle_interrupt = bcm87xx_handle_interrupt,
	.match_phy_device = bcm8727_match_phy_device,
} };

module_phy_driver(bcm87xx_driver);

MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("Broadcom BCM87xx PHY driver");