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6#include <linux/module.h>
7#include <linux/phy.h>
8#include <linux/of.h>
9
10#define PHY_ID_BCM8706 0x0143bdc1
11#define PHY_ID_BCM8727 0x0143bff0
12
13#define BCM87XX_PMD_RX_SIGNAL_DETECT (MII_ADDR_C45 | 0x1000a)
14#define BCM87XX_10GBASER_PCS_STATUS (MII_ADDR_C45 | 0x30020)
15#define BCM87XX_XGXS_LANE_STATUS (MII_ADDR_C45 | 0x40018)
16
17#define BCM87XX_LASI_CONTROL (MII_ADDR_C45 | 0x39002)
18#define BCM87XX_LASI_STATUS (MII_ADDR_C45 | 0x39005)
19
20#if IS_ENABLED(CONFIG_OF_MDIO)
21
22
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31
32
33
34static int bcm87xx_of_reg_init(struct phy_device *phydev)
35{
36 const __be32 *paddr;
37 const __be32 *paddr_end;
38 int len, ret;
39
40 if (!phydev->mdio.dev.of_node)
41 return 0;
42
43 paddr = of_get_property(phydev->mdio.dev.of_node,
44 "broadcom,c45-reg-init", &len);
45 if (!paddr)
46 return 0;
47
48 paddr_end = paddr + (len /= sizeof(*paddr));
49
50 ret = 0;
51
52 while (paddr + 3 < paddr_end) {
53 u16 devid = be32_to_cpup(paddr++);
54 u16 reg = be32_to_cpup(paddr++);
55 u16 mask = be32_to_cpup(paddr++);
56 u16 val_bits = be32_to_cpup(paddr++);
57 u32 regnum = mdiobus_c45_addr(devid, reg);
58 int val = 0;
59
60 if (mask) {
61 val = phy_read(phydev, regnum);
62 if (val < 0) {
63 ret = val;
64 goto err;
65 }
66 val &= mask;
67 }
68 val |= val_bits;
69
70 ret = phy_write(phydev, regnum, val);
71 if (ret < 0)
72 goto err;
73 }
74err:
75 return ret;
76}
77#else
78static int bcm87xx_of_reg_init(struct phy_device *phydev)
79{
80 return 0;
81}
82#endif
83
84static int bcm87xx_get_features(struct phy_device *phydev)
85{
86 linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseR_FEC_BIT,
87 phydev->supported);
88 return 0;
89}
90
91static int bcm87xx_config_init(struct phy_device *phydev)
92{
93 return bcm87xx_of_reg_init(phydev);
94}
95
96static int bcm87xx_config_aneg(struct phy_device *phydev)
97{
98 return -EINVAL;
99}
100
101static int bcm87xx_read_status(struct phy_device *phydev)
102{
103 int rx_signal_detect;
104 int pcs_status;
105 int xgxs_lane_status;
106
107 rx_signal_detect = phy_read(phydev, BCM87XX_PMD_RX_SIGNAL_DETECT);
108 if (rx_signal_detect < 0)
109 return rx_signal_detect;
110
111 if ((rx_signal_detect & 1) == 0)
112 goto no_link;
113
114 pcs_status = phy_read(phydev, BCM87XX_10GBASER_PCS_STATUS);
115 if (pcs_status < 0)
116 return pcs_status;
117
118 if ((pcs_status & 1) == 0)
119 goto no_link;
120
121 xgxs_lane_status = phy_read(phydev, BCM87XX_XGXS_LANE_STATUS);
122 if (xgxs_lane_status < 0)
123 return xgxs_lane_status;
124
125 if ((xgxs_lane_status & 0x1000) == 0)
126 goto no_link;
127
128 phydev->speed = 10000;
129 phydev->link = 1;
130 phydev->duplex = 1;
131 return 0;
132
133no_link:
134 phydev->link = 0;
135 return 0;
136}
137
138static int bcm87xx_config_intr(struct phy_device *phydev)
139{
140 int reg, err;
141
142 reg = phy_read(phydev, BCM87XX_LASI_CONTROL);
143
144 if (reg < 0)
145 return reg;
146
147 if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
148 err = phy_read(phydev, BCM87XX_LASI_STATUS);
149 if (err)
150 return err;
151
152 reg |= 1;
153 err = phy_write(phydev, BCM87XX_LASI_CONTROL, reg);
154 } else {
155 reg &= ~1;
156 err = phy_write(phydev, BCM87XX_LASI_CONTROL, reg);
157 if (err)
158 return err;
159
160 err = phy_read(phydev, BCM87XX_LASI_STATUS);
161 }
162
163 return err;
164}
165
166static irqreturn_t bcm87xx_handle_interrupt(struct phy_device *phydev)
167{
168 int irq_status;
169
170 irq_status = phy_read(phydev, BCM87XX_LASI_STATUS);
171 if (irq_status < 0) {
172 phy_error(phydev);
173 return IRQ_NONE;
174 }
175
176 if (irq_status == 0)
177 return IRQ_NONE;
178
179 phy_trigger_machine(phydev);
180
181 return IRQ_HANDLED;
182}
183
184static int bcm8706_match_phy_device(struct phy_device *phydev)
185{
186 return phydev->c45_ids.device_ids[4] == PHY_ID_BCM8706;
187}
188
189static int bcm8727_match_phy_device(struct phy_device *phydev)
190{
191 return phydev->c45_ids.device_ids[4] == PHY_ID_BCM8727;
192}
193
194static struct phy_driver bcm87xx_driver[] = {
195{
196 .phy_id = PHY_ID_BCM8706,
197 .phy_id_mask = 0xffffffff,
198 .name = "Broadcom BCM8706",
199 .get_features = bcm87xx_get_features,
200 .config_init = bcm87xx_config_init,
201 .config_aneg = bcm87xx_config_aneg,
202 .read_status = bcm87xx_read_status,
203 .config_intr = bcm87xx_config_intr,
204 .handle_interrupt = bcm87xx_handle_interrupt,
205 .match_phy_device = bcm8706_match_phy_device,
206}, {
207 .phy_id = PHY_ID_BCM8727,
208 .phy_id_mask = 0xffffffff,
209 .name = "Broadcom BCM8727",
210 .get_features = bcm87xx_get_features,
211 .config_init = bcm87xx_config_init,
212 .config_aneg = bcm87xx_config_aneg,
213 .read_status = bcm87xx_read_status,
214 .config_intr = bcm87xx_config_intr,
215 .handle_interrupt = bcm87xx_handle_interrupt,
216 .match_phy_device = bcm8727_match_phy_device,
217} };
218
219module_phy_driver(bcm87xx_driver);
220
221MODULE_LICENSE("GPL v2");
222
