blob: 799789518e873edf273c95be6ec1c3b59ff4aa80 [file] [log] [blame]
David Daneye9976d72012-06-27 07:33:38 +00001/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 2011 - 2012 Cavium, Inc.
7 */
8
9#include <linux/module.h>
10#include <linux/phy.h>
11#include <linux/of.h>
12
13#define PHY_ID_BCM8706 0x0143bdc1
14#define PHY_ID_BCM8727 0x0143bff0
15
16#define BCM87XX_PMD_RX_SIGNAL_DETECT (MII_ADDR_C45 | 0x1000a)
17#define BCM87XX_10GBASER_PCS_STATUS (MII_ADDR_C45 | 0x30020)
18#define BCM87XX_XGXS_LANE_STATUS (MII_ADDR_C45 | 0x40018)
19
20#define BCM87XX_LASI_CONTROL (MII_ADDR_C45 | 0x39002)
21#define BCM87XX_LASI_STATUS (MII_ADDR_C45 | 0x39005)
22
23#if IS_ENABLED(CONFIG_OF_MDIO)
24/* Set and/or override some configuration registers based on the
Peter Korsgaard806a0fb2012-07-04 05:05:45 +000025 * broadcom,c45-reg-init property stored in the of_node for the phydev.
David Daneye9976d72012-06-27 07:33:38 +000026 *
27 * broadcom,c45-reg-init = <devid reg mask value>,...;
28 *
29 * There may be one or more sets of <devid reg mask value>:
30 *
31 * devid: which sub-device to use.
32 * reg: the register.
33 * mask: if non-zero, ANDed with existing register value.
34 * value: ORed with the masked value and written to the regiser.
35 *
36 */
37static int bcm87xx_of_reg_init(struct phy_device *phydev)
38{
39 const __be32 *paddr;
40 const __be32 *paddr_end;
41 int len, ret;
42
43 if (!phydev->dev.of_node)
44 return 0;
45
46 paddr = of_get_property(phydev->dev.of_node,
47 "broadcom,c45-reg-init", &len);
48 if (!paddr)
49 return 0;
50
51 paddr_end = paddr + (len /= sizeof(*paddr));
52
53 ret = 0;
54
55 while (paddr + 3 < paddr_end) {
56 u16 devid = be32_to_cpup(paddr++);
57 u16 reg = be32_to_cpup(paddr++);
58 u16 mask = be32_to_cpup(paddr++);
59 u16 val_bits = be32_to_cpup(paddr++);
60 int val;
61 u32 regnum = MII_ADDR_C45 | (devid << 16) | reg;
62 val = 0;
63 if (mask) {
64 val = phy_read(phydev, regnum);
65 if (val < 0) {
66 ret = val;
67 goto err;
68 }
69 val &= mask;
70 }
71 val |= val_bits;
72
73 ret = phy_write(phydev, regnum, val);
74 if (ret < 0)
75 goto err;
76 }
77err:
78 return ret;
79}
80#else
81static int bcm87xx_of_reg_init(struct phy_device *phydev)
82{
83 return 0;
84}
85#endif /* CONFIG_OF_MDIO */
86
87static int bcm87xx_config_init(struct phy_device *phydev)
88{
89 phydev->supported = SUPPORTED_10000baseR_FEC;
90 phydev->advertising = ADVERTISED_10000baseR_FEC;
91 phydev->state = PHY_NOLINK;
Peter Korsgaard567990c2012-07-04 00:33:57 +000092 phydev->autoneg = AUTONEG_DISABLE;
David Daneye9976d72012-06-27 07:33:38 +000093
94 bcm87xx_of_reg_init(phydev);
95
96 return 0;
97}
98
99static int bcm87xx_config_aneg(struct phy_device *phydev)
100{
101 return -EINVAL;
102}
103
104static int bcm87xx_read_status(struct phy_device *phydev)
105{
106 int rx_signal_detect;
107 int pcs_status;
108 int xgxs_lane_status;
109
110 rx_signal_detect = phy_read(phydev, BCM87XX_PMD_RX_SIGNAL_DETECT);
111 if (rx_signal_detect < 0)
112 return rx_signal_detect;
113
114 if ((rx_signal_detect & 1) == 0)
115 goto no_link;
116
117 pcs_status = phy_read(phydev, BCM87XX_10GBASER_PCS_STATUS);
118 if (pcs_status < 0)
119 return pcs_status;
120
121 if ((pcs_status & 1) == 0)
122 goto no_link;
123
124 xgxs_lane_status = phy_read(phydev, BCM87XX_XGXS_LANE_STATUS);
125 if (xgxs_lane_status < 0)
126 return xgxs_lane_status;
127
128 if ((xgxs_lane_status & 0x1000) == 0)
129 goto no_link;
130
131 phydev->speed = 10000;
132 phydev->link = 1;
133 phydev->duplex = 1;
134 return 0;
135
136no_link:
137 phydev->link = 0;
138 return 0;
139}
140
141static int bcm87xx_config_intr(struct phy_device *phydev)
142{
143 int reg, err;
144
145 reg = phy_read(phydev, BCM87XX_LASI_CONTROL);
146
147 if (reg < 0)
148 return reg;
149
150 if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
151 reg |= 1;
152 else
153 reg &= ~1;
154
155 err = phy_write(phydev, BCM87XX_LASI_CONTROL, reg);
156 return err;
157}
158
159static int bcm87xx_did_interrupt(struct phy_device *phydev)
160{
161 int reg;
162
163 reg = phy_read(phydev, BCM87XX_LASI_STATUS);
164
165 if (reg < 0) {
166 dev_err(&phydev->dev,
167 "Error: Read of BCM87XX_LASI_STATUS failed: %d\n", reg);
168 return 0;
169 }
170 return (reg & 1) != 0;
171}
172
173static int bcm87xx_ack_interrupt(struct phy_device *phydev)
174{
175 /* Reading the LASI status clears it. */
176 bcm87xx_did_interrupt(phydev);
177 return 0;
178}
179
180static int bcm8706_match_phy_device(struct phy_device *phydev)
181{
182 return phydev->c45_ids.device_ids[4] == PHY_ID_BCM8706;
183}
184
185static int bcm8727_match_phy_device(struct phy_device *phydev)
186{
187 return phydev->c45_ids.device_ids[4] == PHY_ID_BCM8727;
188}
189
Christian Hohnstaedtd5bf9072012-07-04 05:44:34 +0000190static struct phy_driver bcm87xx_driver[] = {
191{
David Daneye9976d72012-06-27 07:33:38 +0000192 .phy_id = PHY_ID_BCM8706,
193 .phy_id_mask = 0xffffffff,
194 .name = "Broadcom BCM8706",
195 .flags = PHY_HAS_INTERRUPT,
196 .config_init = bcm87xx_config_init,
197 .config_aneg = bcm87xx_config_aneg,
198 .read_status = bcm87xx_read_status,
199 .ack_interrupt = bcm87xx_ack_interrupt,
200 .config_intr = bcm87xx_config_intr,
201 .did_interrupt = bcm87xx_did_interrupt,
202 .match_phy_device = bcm8706_match_phy_device,
203 .driver = { .owner = THIS_MODULE },
Christian Hohnstaedtd5bf9072012-07-04 05:44:34 +0000204}, {
David Daneye9976d72012-06-27 07:33:38 +0000205 .phy_id = PHY_ID_BCM8727,
206 .phy_id_mask = 0xffffffff,
207 .name = "Broadcom BCM8727",
208 .flags = PHY_HAS_INTERRUPT,
209 .config_init = bcm87xx_config_init,
210 .config_aneg = bcm87xx_config_aneg,
211 .read_status = bcm87xx_read_status,
212 .ack_interrupt = bcm87xx_ack_interrupt,
213 .config_intr = bcm87xx_config_intr,
214 .did_interrupt = bcm87xx_did_interrupt,
215 .match_phy_device = bcm8727_match_phy_device,
216 .driver = { .owner = THIS_MODULE },
Christian Hohnstaedtd5bf9072012-07-04 05:44:34 +0000217} };
David Daneye9976d72012-06-27 07:33:38 +0000218
219static int __init bcm87xx_init(void)
220{
Christian Hohnstaedtd5bf9072012-07-04 05:44:34 +0000221 return phy_drivers_register(bcm87xx_driver,
222 ARRAY_SIZE(bcm87xx_driver));
David Daneye9976d72012-06-27 07:33:38 +0000223}
224module_init(bcm87xx_init);
225
226static void __exit bcm87xx_exit(void)
227{
Christian Hohnstaedtd5bf9072012-07-04 05:44:34 +0000228 phy_drivers_unregister(bcm87xx_driver,
229 ARRAY_SIZE(bcm87xx_driver));
David Daneye9976d72012-06-27 07:33:38 +0000230}
231module_exit(bcm87xx_exit);
Peter Hüwe9913b8c2012-09-21 16:44:18 +0000232
233MODULE_LICENSE("GPL");