]> Pileus Git - ~andy/linux/blob - drivers/net/phy/icplus.c
Merge branch 'stable/autoballoon.v5.2' into stable/for-linus-3.5
[~andy/linux] / drivers / net / phy / icplus.c
1 /*
2  * Driver for ICPlus PHYs
3  *
4  * Copyright (c) 2007 Freescale Semiconductor, Inc.
5  *
6  * This program is free software; you can redistribute  it and/or modify it
7  * under  the terms of  the GNU General  Public License as published by the
8  * Free Software Foundation;  either version 2 of the  License, or (at your
9  * option) any later version.
10  *
11  */
12 #include <linux/kernel.h>
13 #include <linux/string.h>
14 #include <linux/errno.h>
15 #include <linux/unistd.h>
16 #include <linux/interrupt.h>
17 #include <linux/init.h>
18 #include <linux/delay.h>
19 #include <linux/netdevice.h>
20 #include <linux/etherdevice.h>
21 #include <linux/skbuff.h>
22 #include <linux/spinlock.h>
23 #include <linux/mm.h>
24 #include <linux/module.h>
25 #include <linux/mii.h>
26 #include <linux/ethtool.h>
27 #include <linux/phy.h>
28
29 #include <asm/io.h>
30 #include <asm/irq.h>
31 #include <asm/uaccess.h>
32
33 MODULE_DESCRIPTION("ICPlus IP175C/IP101A/IP101G/IC1001 PHY drivers");
34 MODULE_AUTHOR("Michael Barkowski");
35 MODULE_LICENSE("GPL");
36
37 /* IP101A/G - IP1001 */
38 #define IP10XX_SPEC_CTRL_STATUS         16      /* Spec. Control Register */
39 #define IP1001_SPEC_CTRL_STATUS_2       20      /* IP1001 Spec. Control Reg 2 */
40 #define IP1001_PHASE_SEL_MASK           3       /* IP1001 RX/TXPHASE_SEL */
41 #define IP1001_APS_ON                   11      /* IP1001 APS Mode  bit */
42 #define IP101A_G_APS_ON                 2       /* IP101A/G APS Mode bit */
43
44 static int ip175c_config_init(struct phy_device *phydev)
45 {
46         int err, i;
47         static int full_reset_performed = 0;
48
49         if (full_reset_performed == 0) {
50
51                 /* master reset */
52                 err = mdiobus_write(phydev->bus, 30, 0, 0x175c);
53                 if (err < 0)
54                         return err;
55
56                 /* ensure no bus delays overlap reset period */
57                 err = mdiobus_read(phydev->bus, 30, 0);
58
59                 /* data sheet specifies reset period is 2 msec */
60                 mdelay(2);
61
62                 /* enable IP175C mode */
63                 err = mdiobus_write(phydev->bus, 29, 31, 0x175c);
64                 if (err < 0)
65                         return err;
66
67                 /* Set MII0 speed and duplex (in PHY mode) */
68                 err = mdiobus_write(phydev->bus, 29, 22, 0x420);
69                 if (err < 0)
70                         return err;
71
72                 /* reset switch ports */
73                 for (i = 0; i < 5; i++) {
74                         err = mdiobus_write(phydev->bus, i,
75                                             MII_BMCR, BMCR_RESET);
76                         if (err < 0)
77                                 return err;
78                 }
79
80                 for (i = 0; i < 5; i++)
81                         err = mdiobus_read(phydev->bus, i, MII_BMCR);
82
83                 mdelay(2);
84
85                 full_reset_performed = 1;
86         }
87
88         if (phydev->addr != 4) {
89                 phydev->state = PHY_RUNNING;
90                 phydev->speed = SPEED_100;
91                 phydev->duplex = DUPLEX_FULL;
92                 phydev->link = 1;
93                 netif_carrier_on(phydev->attached_dev);
94         }
95
96         return 0;
97 }
98
99 static int ip1xx_reset(struct phy_device *phydev)
100 {
101         int bmcr;
102
103         /* Software Reset PHY */
104         bmcr = phy_read(phydev, MII_BMCR);
105         if (bmcr < 0)
106                 return bmcr;
107         bmcr |= BMCR_RESET;
108         bmcr = phy_write(phydev, MII_BMCR, bmcr);
109         if (bmcr < 0)
110                 return bmcr;
111
112         do {
113                 bmcr = phy_read(phydev, MII_BMCR);
114                 if (bmcr < 0)
115                         return bmcr;
116         } while (bmcr & BMCR_RESET);
117
118         return 0;
119 }
120
121 static int ip1001_config_init(struct phy_device *phydev)
122 {
123         int c;
124
125         c = ip1xx_reset(phydev);
126         if (c < 0)
127                 return c;
128
129         /* Enable Auto Power Saving mode */
130         c = phy_read(phydev, IP1001_SPEC_CTRL_STATUS_2);
131         if (c < 0)
132                 return c;
133         c |= IP1001_APS_ON;
134         c = phy_write(phydev, IP1001_SPEC_CTRL_STATUS_2, c);
135         if (c < 0)
136                 return c;
137
138         if (phydev->interface == PHY_INTERFACE_MODE_RGMII) {
139                 /* Additional delay (2ns) used to adjust RX clock phase
140                  * at RGMII interface */
141                 c = phy_read(phydev, IP10XX_SPEC_CTRL_STATUS);
142                 if (c < 0)
143                         return c;
144
145                 c |= IP1001_PHASE_SEL_MASK;
146                 c = phy_write(phydev, IP10XX_SPEC_CTRL_STATUS, c);
147                 if (c < 0)
148                         return c;
149         }
150
151         return 0;
152 }
153
154 static int ip101a_g_config_init(struct phy_device *phydev)
155 {
156         int c;
157
158         c = ip1xx_reset(phydev);
159         if (c < 0)
160                 return c;
161
162         /* Enable Auto Power Saving mode */
163         c = phy_read(phydev, IP10XX_SPEC_CTRL_STATUS);
164         c |= IP101A_G_APS_ON;
165
166         return phy_write(phydev, IP10XX_SPEC_CTRL_STATUS, c);
167 }
168
169 static int ip175c_read_status(struct phy_device *phydev)
170 {
171         if (phydev->addr == 4) /* WAN port */
172                 genphy_read_status(phydev);
173         else
174                 /* Don't need to read status for switch ports */
175                 phydev->irq = PHY_IGNORE_INTERRUPT;
176
177         return 0;
178 }
179
180 static int ip175c_config_aneg(struct phy_device *phydev)
181 {
182         if (phydev->addr == 4) /* WAN port */
183                 genphy_config_aneg(phydev);
184
185         return 0;
186 }
187
188 static struct phy_driver ip175c_driver = {
189         .phy_id         = 0x02430d80,
190         .name           = "ICPlus IP175C",
191         .phy_id_mask    = 0x0ffffff0,
192         .features       = PHY_BASIC_FEATURES,
193         .config_init    = &ip175c_config_init,
194         .config_aneg    = &ip175c_config_aneg,
195         .read_status    = &ip175c_read_status,
196         .suspend        = genphy_suspend,
197         .resume         = genphy_resume,
198         .driver         = { .owner = THIS_MODULE,},
199 };
200
201 static struct phy_driver ip1001_driver = {
202         .phy_id         = 0x02430d90,
203         .name           = "ICPlus IP1001",
204         .phy_id_mask    = 0x0ffffff0,
205         .features       = PHY_GBIT_FEATURES | SUPPORTED_Pause |
206                           SUPPORTED_Asym_Pause,
207         .flags          = PHY_HAS_INTERRUPT,
208         .config_init    = &ip1001_config_init,
209         .config_aneg    = &genphy_config_aneg,
210         .read_status    = &genphy_read_status,
211         .suspend        = genphy_suspend,
212         .resume         = genphy_resume,
213         .driver         = { .owner = THIS_MODULE,},
214 };
215
216 static struct phy_driver ip101a_g_driver = {
217         .phy_id         = 0x02430c54,
218         .name           = "ICPlus IP101A/G",
219         .phy_id_mask    = 0x0ffffff0,
220         .features       = PHY_BASIC_FEATURES | SUPPORTED_Pause |
221                           SUPPORTED_Asym_Pause,
222         .flags          = PHY_HAS_INTERRUPT,
223         .config_init    = &ip101a_g_config_init,
224         .config_aneg    = &genphy_config_aneg,
225         .read_status    = &genphy_read_status,
226         .suspend        = genphy_suspend,
227         .resume         = genphy_resume,
228         .driver         = { .owner = THIS_MODULE,},
229 };
230
231 static int __init icplus_init(void)
232 {
233         int ret = 0;
234
235         ret = phy_driver_register(&ip1001_driver);
236         if (ret < 0)
237                 return -ENODEV;
238
239         ret = phy_driver_register(&ip101a_g_driver);
240         if (ret < 0)
241                 return -ENODEV;
242
243         return phy_driver_register(&ip175c_driver);
244 }
245
246 static void __exit icplus_exit(void)
247 {
248         phy_driver_unregister(&ip1001_driver);
249         phy_driver_unregister(&ip101a_g_driver);
250         phy_driver_unregister(&ip175c_driver);
251 }
252
253 module_init(icplus_init);
254 module_exit(icplus_exit);
255
256 static struct mdio_device_id __maybe_unused icplus_tbl[] = {
257         { 0x02430d80, 0x0ffffff0 },
258         { 0x02430d90, 0x0ffffff0 },
259         { 0x02430c54, 0x0ffffff0 },
260         { }
261 };
262
263 MODULE_DEVICE_TABLE(mdio, icplus_tbl);