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linux
1/*
2 * drivers/net/phy/broadcom.c
3 *
4 * Broadcom BCM5411, BCM5421 and BCM5461 Gigabit Ethernet
5 * transceivers.
6 *
7 * Copyright (c) 2006 Maciej W. Rozycki
8 *
9 * Inspired by code written by Amy Fong.
10 *
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version
14 * 2 of the License, or (at your option) any later version.
15 */
16
17#include <linux/module.h>
18#include <linux/phy.h>
19
20#define MII_BCM54XX_ECR 0x10 /* BCM54xx extended control register */
21#define MII_BCM54XX_ECR_IM 0x1000 /* Interrupt mask */
22#define MII_BCM54XX_ECR_IF 0x0800 /* Interrupt force */
23
24#define MII_BCM54XX_ESR 0x11 /* BCM54xx extended status register */
25#define MII_BCM54XX_ESR_IS 0x1000 /* Interrupt status */
26
27#define MII_BCM54XX_ISR 0x1a /* BCM54xx interrupt status register */
28#define MII_BCM54XX_IMR 0x1b /* BCM54xx interrupt mask register */
29#define MII_BCM54XX_INT_CRCERR 0x0001 /* CRC error */
30#define MII_BCM54XX_INT_LINK 0x0002 /* Link status changed */
31#define MII_BCM54XX_INT_SPEED 0x0004 /* Link speed change */
32#define MII_BCM54XX_INT_DUPLEX 0x0008 /* Duplex mode changed */
33#define MII_BCM54XX_INT_LRS 0x0010 /* Local receiver status changed */
34#define MII_BCM54XX_INT_RRS 0x0020 /* Remote receiver status changed */
35#define MII_BCM54XX_INT_SSERR 0x0040 /* Scrambler synchronization error */
36#define MII_BCM54XX_INT_UHCD 0x0080 /* Unsupported HCD negotiated */
37#define MII_BCM54XX_INT_NHCD 0x0100 /* No HCD */
38#define MII_BCM54XX_INT_NHCDL 0x0200 /* No HCD link */
39#define MII_BCM54XX_INT_ANPR 0x0400 /* Auto-negotiation page received */
40#define MII_BCM54XX_INT_LC 0x0800 /* All counters below 128 */
41#define MII_BCM54XX_INT_HC 0x1000 /* Counter above 32768 */
42#define MII_BCM54XX_INT_MDIX 0x2000 /* MDIX status change */
43#define MII_BCM54XX_INT_PSERR 0x4000 /* Pair swap error */
44
45MODULE_DESCRIPTION("Broadcom PHY driver");
46MODULE_AUTHOR("Maciej W. Rozycki");
47MODULE_LICENSE("GPL");
48
49static int bcm54xx_config_init(struct phy_device *phydev)
50{
51 int reg, err;
52
53 reg = phy_read(phydev, MII_BCM54XX_ECR);
54 if (reg < 0)
55 return reg;
56
57 /* Mask interrupts globally. */
58 reg |= MII_BCM54XX_ECR_IM;
59 err = phy_write(phydev, MII_BCM54XX_ECR, reg);
60 if (err < 0)
61 return err;
62
63 /* Unmask events we are interested in. */
64 reg = ~(MII_BCM54XX_INT_DUPLEX |
65 MII_BCM54XX_INT_SPEED |
66 MII_BCM54XX_INT_LINK);
67 err = phy_write(phydev, MII_BCM54XX_IMR, reg);
68 if (err < 0)
69 return err;
70 return 0;
71}
72
73static int bcm54xx_ack_interrupt(struct phy_device *phydev)
74{
75 int reg;
76
77 /* Clear pending interrupts. */
78 reg = phy_read(phydev, MII_BCM54XX_ISR);
79 if (reg < 0)
80 return reg;
81
82 return 0;
83}
84
85static int bcm54xx_config_intr(struct phy_device *phydev)
86{
87 int reg, err;
88
89 reg = phy_read(phydev, MII_BCM54XX_ECR);
90 if (reg < 0)
91 return reg;
92
93 if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
94 reg &= ~MII_BCM54XX_ECR_IM;
95 else
96 reg |= MII_BCM54XX_ECR_IM;
97
98 err = phy_write(phydev, MII_BCM54XX_ECR, reg);
99 return err;
100}
101
102static int bcm5481_config_aneg(struct phy_device *phydev)
103{
104 int ret;
105
106 /* Aneg firsly. */
107 ret = genphy_config_aneg(phydev);
108
109 /* Then we can set up the delay. */
110 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID) {
111 u16 reg;
112
113 /*
114 * There is no BCM5481 specification available, so down
115 * here is everything we know about "register 0x18". This
116 * at least helps BCM5481 to successfuly receive packets
117 * on MPC8360E-RDK board. Peter Barada <peterb@logicpd.com>
118 * says: "This sets delay between the RXD and RXC signals
119 * instead of using trace lengths to achieve timing".
120 */
121
122 /* Set RDX clk delay. */
123 reg = 0x7 | (0x7 << 12);
124 phy_write(phydev, 0x18, reg);
125
126 reg = phy_read(phydev, 0x18);
127 /* Set RDX-RXC skew. */
128 reg |= (1 << 8);
129 /* Write bits 14:0. */
130 reg |= (1 << 15);
131 phy_write(phydev, 0x18, reg);
132 }
133
134 return ret;
135}
136
137static struct phy_driver bcm5411_driver = {
138 .phy_id = 0x00206070,
139 .phy_id_mask = 0xfffffff0,
140 .name = "Broadcom BCM5411",
141 .features = PHY_GBIT_FEATURES,
142 .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
143 .config_init = bcm54xx_config_init,
144 .config_aneg = genphy_config_aneg,
145 .read_status = genphy_read_status,
146 .ack_interrupt = bcm54xx_ack_interrupt,
147 .config_intr = bcm54xx_config_intr,
148 .driver = { .owner = THIS_MODULE },
149};
150
151static struct phy_driver bcm5421_driver = {
152 .phy_id = 0x002060e0,
153 .phy_id_mask = 0xfffffff0,
154 .name = "Broadcom BCM5421",
155 .features = PHY_GBIT_FEATURES,
156 .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
157 .config_init = bcm54xx_config_init,
158 .config_aneg = genphy_config_aneg,
159 .read_status = genphy_read_status,
160 .ack_interrupt = bcm54xx_ack_interrupt,
161 .config_intr = bcm54xx_config_intr,
162 .driver = { .owner = THIS_MODULE },
163};
164
165static struct phy_driver bcm5461_driver = {
166 .phy_id = 0x002060c0,
167 .phy_id_mask = 0xfffffff0,
168 .name = "Broadcom BCM5461",
169 .features = PHY_GBIT_FEATURES,
170 .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
171 .config_init = bcm54xx_config_init,
172 .config_aneg = genphy_config_aneg,
173 .read_status = genphy_read_status,
174 .ack_interrupt = bcm54xx_ack_interrupt,
175 .config_intr = bcm54xx_config_intr,
176 .driver = { .owner = THIS_MODULE },
177};
178
179static struct phy_driver bcm5464_driver = {
180 .phy_id = 0x002060b0,
181 .phy_id_mask = 0xfffffff0,
182 .name = "Broadcom BCM5464",
183 .features = PHY_GBIT_FEATURES,
184 .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
185 .config_init = bcm54xx_config_init,
186 .config_aneg = genphy_config_aneg,
187 .read_status = genphy_read_status,
188 .ack_interrupt = bcm54xx_ack_interrupt,
189 .config_intr = bcm54xx_config_intr,
190 .driver = { .owner = THIS_MODULE },
191};
192
193static struct phy_driver bcm5481_driver = {
194 .phy_id = 0x0143bca0,
195 .phy_id_mask = 0xfffffff0,
196 .name = "Broadcom BCM5481",
197 .features = PHY_GBIT_FEATURES,
198 .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
199 .config_init = bcm54xx_config_init,
200 .config_aneg = bcm5481_config_aneg,
201 .read_status = genphy_read_status,
202 .ack_interrupt = bcm54xx_ack_interrupt,
203 .config_intr = bcm54xx_config_intr,
204 .driver = { .owner = THIS_MODULE },
205};
206
207static struct phy_driver bcm5482_driver = {
208 .phy_id = 0x0143bcb0,
209 .phy_id_mask = 0xfffffff0,
210 .name = "Broadcom BCM5482",
211 .features = PHY_GBIT_FEATURES,
212 .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
213 .config_init = bcm54xx_config_init,
214 .config_aneg = genphy_config_aneg,
215 .read_status = genphy_read_status,
216 .ack_interrupt = bcm54xx_ack_interrupt,
217 .config_intr = bcm54xx_config_intr,
218 .driver = { .owner = THIS_MODULE },
219};
220
221static int __init broadcom_init(void)
222{
223 int ret;
224
225 ret = phy_driver_register(&bcm5411_driver);
226 if (ret)
227 goto out_5411;
228 ret = phy_driver_register(&bcm5421_driver);
229 if (ret)
230 goto out_5421;
231 ret = phy_driver_register(&bcm5461_driver);
232 if (ret)
233 goto out_5461;
234 ret = phy_driver_register(&bcm5464_driver);
235 if (ret)
236 goto out_5464;
237 ret = phy_driver_register(&bcm5481_driver);
238 if (ret)
239 goto out_5481;
240 ret = phy_driver_register(&bcm5482_driver);
241 if (ret)
242 goto out_5482;
243 return ret;
244
245out_5482:
246 phy_driver_unregister(&bcm5481_driver);
247out_5481:
248 phy_driver_unregister(&bcm5464_driver);
249out_5464:
250 phy_driver_unregister(&bcm5461_driver);
251out_5461:
252 phy_driver_unregister(&bcm5421_driver);
253out_5421:
254 phy_driver_unregister(&bcm5411_driver);
255out_5411:
256 return ret;
257}
258
259static void __exit broadcom_exit(void)
260{
261 phy_driver_unregister(&bcm5482_driver);
262 phy_driver_unregister(&bcm5481_driver);
263 phy_driver_unregister(&bcm5464_driver);
264 phy_driver_unregister(&bcm5461_driver);
265 phy_driver_unregister(&bcm5421_driver);
266 phy_driver_unregister(&bcm5411_driver);
267}
268
269module_init(broadcom_init);
270module_exit(broadcom_exit);