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
ip175c_config_init(struct phy_device * phydev)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
ip1xx_reset(struct phy_device * phydev)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
ip1001_config_init(struct phy_device * phydev)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
ip101a_g_config_init(struct phy_device * phydev)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 return c;
166 }
167
ip175c_read_status(struct phy_device * phydev)168 static int ip175c_read_status(struct phy_device *phydev)
169 {
170 if (phydev->addr == 4) /* WAN port */
171 genphy_read_status(phydev);
172 else
173 /* Don't need to read status for switch ports */
174 phydev->irq = PHY_IGNORE_INTERRUPT;
175
176 return 0;
177 }
178
ip175c_config_aneg(struct phy_device * phydev)179 static int ip175c_config_aneg(struct phy_device *phydev)
180 {
181 if (phydev->addr == 4) /* WAN port */
182 genphy_config_aneg(phydev);
183
184 return 0;
185 }
186
187 static struct phy_driver ip175c_driver = {
188 .phy_id = 0x02430d80,
189 .name = "ICPlus IP175C",
190 .phy_id_mask = 0x0ffffff0,
191 .features = PHY_BASIC_FEATURES,
192 .config_init = &ip175c_config_init,
193 .config_aneg = &ip175c_config_aneg,
194 .read_status = &ip175c_read_status,
195 .suspend = genphy_suspend,
196 .resume = genphy_resume,
197 .driver = { .owner = THIS_MODULE,},
198 };
199
200 static struct phy_driver ip1001_driver = {
201 .phy_id = 0x02430d90,
202 .name = "ICPlus IP1001",
203 .phy_id_mask = 0x0ffffff0,
204 .features = PHY_GBIT_FEATURES | SUPPORTED_Pause |
205 SUPPORTED_Asym_Pause,
206 .flags = PHY_HAS_INTERRUPT,
207 .config_init = &ip1001_config_init,
208 .config_aneg = &genphy_config_aneg,
209 .read_status = &genphy_read_status,
210 .suspend = genphy_suspend,
211 .resume = genphy_resume,
212 .driver = { .owner = THIS_MODULE,},
213 };
214
215 static struct phy_driver ip101a_g_driver = {
216 .phy_id = 0x02430c54,
217 .name = "ICPlus IP101A/G",
218 .phy_id_mask = 0x0ffffff0,
219 .features = PHY_BASIC_FEATURES | SUPPORTED_Pause |
220 SUPPORTED_Asym_Pause,
221 .flags = PHY_HAS_INTERRUPT,
222 .config_init = &ip101a_g_config_init,
223 .config_aneg = &genphy_config_aneg,
224 .read_status = &genphy_read_status,
225 .suspend = genphy_suspend,
226 .resume = genphy_resume,
227 .driver = { .owner = THIS_MODULE,},
228 };
229
icplus_init(void)230 static int __init icplus_init(void)
231 {
232 int ret = 0;
233
234 ret = phy_driver_register(&ip1001_driver);
235 if (ret < 0)
236 return -ENODEV;
237
238 ret = phy_driver_register(&ip101a_g_driver);
239 if (ret < 0)
240 return -ENODEV;
241
242 return phy_driver_register(&ip175c_driver);
243 }
244
icplus_exit(void)245 static void __exit icplus_exit(void)
246 {
247 phy_driver_unregister(&ip1001_driver);
248 phy_driver_unregister(&ip101a_g_driver);
249 phy_driver_unregister(&ip175c_driver);
250 }
251
252 module_init(icplus_init);
253 module_exit(icplus_exit);
254
255 static struct mdio_device_id __maybe_unused icplus_tbl[] = {
256 { 0x02430d80, 0x0ffffff0 },
257 { 0x02430d90, 0x0ffffff0 },
258 { 0x02430c54, 0x0ffffff0 },
259 { }
260 };
261
262 MODULE_DEVICE_TABLE(mdio, icplus_tbl);
263