Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
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linux
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 <linux/uaccess.h>
32
33MODULE_DESCRIPTION("ICPlus IP175C/IP101A/IP101G/IC1001 PHY drivers");
34MODULE_AUTHOR("Michael Barkowski");
35MODULE_LICENSE("GPL");
36
37/* IP101A/G - IP1001 */
38#define IP10XX_SPEC_CTRL_STATUS 16 /* Spec. Control Register */
39#define IP1001_RXPHASE_SEL (1<<0) /* Add delay on RX_CLK */
40#define IP1001_TXPHASE_SEL (1<<1) /* Add delay on TX_CLK */
41#define IP1001_SPEC_CTRL_STATUS_2 20 /* IP1001 Spec. Control Reg 2 */
42#define IP1001_APS_ON 11 /* IP1001 APS Mode bit */
43#define IP101A_G_APS_ON 2 /* IP101A/G APS Mode bit */
44#define IP101A_G_IRQ_CONF_STATUS 0x11 /* Conf Info IRQ & Status Reg */
45#define IP101A_G_IRQ_PIN_USED (1<<15) /* INTR pin used */
46#define IP101A_G_IRQ_DEFAULT IP101A_G_IRQ_PIN_USED
47
48static int ip175c_config_init(struct phy_device *phydev)
49{
50 int err, i;
51 static int full_reset_performed;
52
53 if (full_reset_performed == 0) {
54
55 /* master reset */
56 err = mdiobus_write(phydev->mdio.bus, 30, 0, 0x175c);
57 if (err < 0)
58 return err;
59
60 /* ensure no bus delays overlap reset period */
61 err = mdiobus_read(phydev->mdio.bus, 30, 0);
62
63 /* data sheet specifies reset period is 2 msec */
64 mdelay(2);
65
66 /* enable IP175C mode */
67 err = mdiobus_write(phydev->mdio.bus, 29, 31, 0x175c);
68 if (err < 0)
69 return err;
70
71 /* Set MII0 speed and duplex (in PHY mode) */
72 err = mdiobus_write(phydev->mdio.bus, 29, 22, 0x420);
73 if (err < 0)
74 return err;
75
76 /* reset switch ports */
77 for (i = 0; i < 5; i++) {
78 err = mdiobus_write(phydev->mdio.bus, i,
79 MII_BMCR, BMCR_RESET);
80 if (err < 0)
81 return err;
82 }
83
84 for (i = 0; i < 5; i++)
85 err = mdiobus_read(phydev->mdio.bus, i, MII_BMCR);
86
87 mdelay(2);
88
89 full_reset_performed = 1;
90 }
91
92 if (phydev->mdio.addr != 4) {
93 phydev->state = PHY_RUNNING;
94 phydev->speed = SPEED_100;
95 phydev->duplex = DUPLEX_FULL;
96 phydev->link = 1;
97 netif_carrier_on(phydev->attached_dev);
98 }
99
100 return 0;
101}
102
103static int ip1xx_reset(struct phy_device *phydev)
104{
105 int bmcr;
106
107 /* Software Reset PHY */
108 bmcr = phy_read(phydev, MII_BMCR);
109 if (bmcr < 0)
110 return bmcr;
111 bmcr |= BMCR_RESET;
112 bmcr = phy_write(phydev, MII_BMCR, bmcr);
113 if (bmcr < 0)
114 return bmcr;
115
116 do {
117 bmcr = phy_read(phydev, MII_BMCR);
118 if (bmcr < 0)
119 return bmcr;
120 } while (bmcr & BMCR_RESET);
121
122 return 0;
123}
124
125static int ip1001_config_init(struct phy_device *phydev)
126{
127 int c;
128
129 c = ip1xx_reset(phydev);
130 if (c < 0)
131 return c;
132
133 /* Enable Auto Power Saving mode */
134 c = phy_read(phydev, IP1001_SPEC_CTRL_STATUS_2);
135 if (c < 0)
136 return c;
137 c |= IP1001_APS_ON;
138 c = phy_write(phydev, IP1001_SPEC_CTRL_STATUS_2, c);
139 if (c < 0)
140 return c;
141
142 if (phy_interface_is_rgmii(phydev)) {
143
144 c = phy_read(phydev, IP10XX_SPEC_CTRL_STATUS);
145 if (c < 0)
146 return c;
147
148 c &= ~(IP1001_RXPHASE_SEL | IP1001_TXPHASE_SEL);
149
150 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID)
151 c |= (IP1001_RXPHASE_SEL | IP1001_TXPHASE_SEL);
152 else if (phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID)
153 c |= IP1001_RXPHASE_SEL;
154 else if (phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID)
155 c |= IP1001_TXPHASE_SEL;
156
157 c = phy_write(phydev, IP10XX_SPEC_CTRL_STATUS, c);
158 if (c < 0)
159 return c;
160 }
161
162 return 0;
163}
164
165static int ip101a_g_config_init(struct phy_device *phydev)
166{
167 int c;
168
169 c = ip1xx_reset(phydev);
170 if (c < 0)
171 return c;
172
173 /* INTR pin used: speed/link/duplex will cause an interrupt */
174 c = phy_write(phydev, IP101A_G_IRQ_CONF_STATUS, IP101A_G_IRQ_DEFAULT);
175 if (c < 0)
176 return c;
177
178 /* Enable Auto Power Saving mode */
179 c = phy_read(phydev, IP10XX_SPEC_CTRL_STATUS);
180 c |= IP101A_G_APS_ON;
181
182 return phy_write(phydev, IP10XX_SPEC_CTRL_STATUS, c);
183}
184
185static int ip175c_read_status(struct phy_device *phydev)
186{
187 if (phydev->mdio.addr == 4) /* WAN port */
188 genphy_read_status(phydev);
189 else
190 /* Don't need to read status for switch ports */
191 phydev->irq = PHY_IGNORE_INTERRUPT;
192
193 return 0;
194}
195
196static int ip175c_config_aneg(struct phy_device *phydev)
197{
198 if (phydev->mdio.addr == 4) /* WAN port */
199 genphy_config_aneg(phydev);
200
201 return 0;
202}
203
204static int ip101a_g_ack_interrupt(struct phy_device *phydev)
205{
206 int err = phy_read(phydev, IP101A_G_IRQ_CONF_STATUS);
207 if (err < 0)
208 return err;
209
210 return 0;
211}
212
213static struct phy_driver icplus_driver[] = {
214{
215 .phy_id = 0x02430d80,
216 .name = "ICPlus IP175C",
217 .phy_id_mask = 0x0ffffff0,
218 .features = PHY_BASIC_FEATURES,
219 .config_init = &ip175c_config_init,
220 .config_aneg = &ip175c_config_aneg,
221 .read_status = &ip175c_read_status,
222 .suspend = genphy_suspend,
223 .resume = genphy_resume,
224}, {
225 .phy_id = 0x02430d90,
226 .name = "ICPlus IP1001",
227 .phy_id_mask = 0x0ffffff0,
228 .features = PHY_GBIT_FEATURES,
229 .config_init = &ip1001_config_init,
230 .config_aneg = &genphy_config_aneg,
231 .read_status = &genphy_read_status,
232 .suspend = genphy_suspend,
233 .resume = genphy_resume,
234}, {
235 .phy_id = 0x02430c54,
236 .name = "ICPlus IP101A/G",
237 .phy_id_mask = 0x0ffffff0,
238 .features = PHY_BASIC_FEATURES,
239 .flags = PHY_HAS_INTERRUPT,
240 .ack_interrupt = ip101a_g_ack_interrupt,
241 .config_init = &ip101a_g_config_init,
242 .config_aneg = &genphy_config_aneg,
243 .read_status = &genphy_read_status,
244 .suspend = genphy_suspend,
245 .resume = genphy_resume,
246} };
247
248module_phy_driver(icplus_driver);
249
250static struct mdio_device_id __maybe_unused icplus_tbl[] = {
251 { 0x02430d80, 0x0ffffff0 },
252 { 0x02430d90, 0x0ffffff0 },
253 { 0x02430c54, 0x0ffffff0 },
254 { }
255};
256
257MODULE_DEVICE_TABLE(mdio, icplus_tbl);