tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
phylib: add the ICPlus IP175C PHY driver
The ICPlus IP175C sports a 100Mbit/s 4-port switch in addition
to a dedicated 100Mbit/s WAN port.
Signed-off-by: Michael Barkowski <michael.barkowski@freescale.com>
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
authored by
Michael Barkowski
and committed by
Jeff Garzik
0cefeeba
146bd683
+140
+5
drivers/net/phy/Kconfig
+5
drivers/net/phy/Kconfig
···
55
55
---help---
56
56
Currently supports the BCM5411, BCM5421 and BCM5461 PHYs.
57
57
58
+
config ICPLUS_PHY
59
+
tristate "Drivers for ICPlus PHYs"
60
+
---help---
61
+
Currently supports the IP175C PHY.
62
+
58
63
config FIXED_PHY
59
64
tristate "Drivers for PHY emulation on fixed speed/link"
60
65
---help---
+1
drivers/net/phy/Makefile
+1
drivers/net/phy/Makefile
+134
drivers/net/phy/icplus.c
+134
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/slab.h>
17
+
#include <linux/interrupt.h>
18
+
#include <linux/init.h>
19
+
#include <linux/delay.h>
20
+
#include <linux/netdevice.h>
21
+
#include <linux/etherdevice.h>
22
+
#include <linux/skbuff.h>
23
+
#include <linux/spinlock.h>
24
+
#include <linux/mm.h>
25
+
#include <linux/module.h>
26
+
#include <linux/mii.h>
27
+
#include <linux/ethtool.h>
28
+
#include <linux/phy.h>
29
+
30
+
#include <asm/io.h>
31
+
#include <asm/irq.h>
32
+
#include <asm/uaccess.h>
33
+
34
+
MODULE_DESCRIPTION("ICPlus IP175C PHY driver");
35
+
MODULE_AUTHOR("Michael Barkowski");
36
+
MODULE_LICENSE("GPL");
37
+
38
+
static int ip175c_config_init(struct phy_device *phydev)
39
+
{
40
+
int err, i;
41
+
static int full_reset_performed = 0;
42
+
43
+
if (full_reset_performed == 0) {
44
+
45
+
/* master reset */
46
+
err = phydev->bus->write(phydev->bus, 30, 0, 0x175c);
47
+
if (err < 0)
48
+
return err;
49
+
50
+
/* ensure no bus delays overlap reset period */
51
+
err = phydev->bus->read(phydev->bus, 30, 0);
52
+
53
+
/* data sheet specifies reset period is 2 msec */
54
+
mdelay(2);
55
+
56
+
/* enable IP175C mode */
57
+
err = phydev->bus->write(phydev->bus, 29, 31, 0x175c);
58
+
if (err < 0)
59
+
return err;
60
+
61
+
/* Set MII0 speed and duplex (in PHY mode) */
62
+
err = phydev->bus->write(phydev->bus, 29, 22, 0x420);
63
+
if (err < 0)
64
+
return err;
65
+
66
+
/* reset switch ports */
67
+
for (i = 0; i < 5; i++) {
68
+
err = phydev->bus->write(phydev->bus, i,
69
+
MII_BMCR, BMCR_RESET);
70
+
if (err < 0)
71
+
return err;
72
+
}
73
+
74
+
for (i = 0; i < 5; i++)
75
+
err = phydev->bus->read(phydev->bus, i, MII_BMCR);
76
+
77
+
mdelay(2);
78
+
79
+
full_reset_performed = 1;
80
+
}
81
+
82
+
if (phydev->addr != 4) {
83
+
phydev->state = PHY_RUNNING;
84
+
phydev->speed = SPEED_100;
85
+
phydev->duplex = DUPLEX_FULL;
86
+
phydev->link = 1;
87
+
netif_carrier_on(phydev->attached_dev);
88
+
}
89
+
90
+
return 0;
91
+
}
92
+
93
+
static int ip175c_read_status(struct phy_device *phydev)
94
+
{
95
+
if (phydev->addr == 4) /* WAN port */
96
+
genphy_read_status(phydev);
97
+
else
98
+
/* Don't need to read status for switch ports */
99
+
phydev->irq = PHY_IGNORE_INTERRUPT;
100
+
101
+
return 0;
102
+
}
103
+
104
+
static int ip175c_config_aneg(struct phy_device *phydev)
105
+
{
106
+
if (phydev->addr == 4) /* WAN port */
107
+
genphy_config_aneg(phydev);
108
+
109
+
return 0;
110
+
}
111
+
112
+
static struct phy_driver ip175c_driver = {
113
+
.phy_id = 0x02430d80,
114
+
.name = "ICPlus IP175C",
115
+
.phy_id_mask = 0x0ffffff0,
116
+
.features = PHY_BASIC_FEATURES,
117
+
.config_init = &ip175c_config_init,
118
+
.config_aneg = &ip175c_config_aneg,
119
+
.read_status = &ip175c_read_status,
120
+
.driver = { .owner = THIS_MODULE,},
121
+
};
122
+
123
+
static int __init ip175c_init(void)
124
+
{
125
+
return phy_driver_register(&ip175c_driver);
126
+
}
127
+
128
+
static void __exit ip175c_exit(void)
129
+
{
130
+
phy_driver_unregister(&ip175c_driver);
131
+
}
132
+
133
+
module_init(ip175c_init);
134
+
module_exit(ip175c_exit);