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authorAndy Fleming <afleming@freescale.com>2005-07-30 19:31:23 -0400
committerJeff Garzik <jgarzik@pobox.com>2005-07-30 19:31:23 -0400
commit00db8189d984d6c51226dafbbe4a667ce9b7d5da (patch)
treef19468548c938523e3519670f8554e7a1b9c0c31 /drivers/net/phy/marvell.c
parentb0825488a642cadcf39709961dde61440cb0731c (diff)
This patch adds a PHY Abstraction Layer to the Linux Kernel, enabling
ethernet drivers to remain as ignorant as is reasonable of the connected PHY's design and operation details. Signed-off-by: Andy Fleming <afleming@freescale.com> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
Diffstat (limited to 'drivers/net/phy/marvell.c')
-rw-r--r--drivers/net/phy/marvell.c140
1 files changed, 140 insertions, 0 deletions
diff --git a/drivers/net/phy/marvell.c b/drivers/net/phy/marvell.c
new file mode 100644
index 000000000000..4a72b025006b
--- /dev/null
+++ b/drivers/net/phy/marvell.c
@@ -0,0 +1,140 @@
1/*
2 * drivers/net/phy/marvell.c
3 *
4 * Driver for Marvell PHYs
5 *
6 * Author: Andy Fleming
7 *
8 * Copyright (c) 2004 Freescale Semiconductor, Inc.
9 *
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the
12 * Free Software Foundation; either version 2 of the License, or (at your
13 * option) any later version.
14 *
15 */
16#include <linux/config.h>
17#include <linux/kernel.h>
18#include <linux/sched.h>
19#include <linux/string.h>
20#include <linux/errno.h>
21#include <linux/unistd.h>
22#include <linux/slab.h>
23#include <linux/interrupt.h>
24#include <linux/init.h>
25#include <linux/delay.h>
26#include <linux/netdevice.h>
27#include <linux/etherdevice.h>
28#include <linux/skbuff.h>
29#include <linux/spinlock.h>
30#include <linux/mm.h>
31#include <linux/module.h>
32#include <linux/version.h>
33#include <linux/mii.h>
34#include <linux/ethtool.h>
35#include <linux/phy.h>
36
37#include <asm/io.h>
38#include <asm/irq.h>
39#include <asm/uaccess.h>
40
41#define MII_M1011_IEVENT 0x13
42#define MII_M1011_IEVENT_CLEAR 0x0000
43
44#define MII_M1011_IMASK 0x12
45#define MII_M1011_IMASK_INIT 0x6400
46#define MII_M1011_IMASK_CLEAR 0x0000
47
48MODULE_DESCRIPTION("Marvell PHY driver");
49MODULE_AUTHOR("Andy Fleming");
50MODULE_LICENSE("GPL");
51
52static int marvell_ack_interrupt(struct phy_device *phydev)
53{
54 int err;
55
56 /* Clear the interrupts by reading the reg */
57 err = phy_read(phydev, MII_M1011_IEVENT);
58
59 if (err < 0)
60 return err;
61
62 return 0;
63}
64
65static int marvell_config_intr(struct phy_device *phydev)
66{
67 int err;
68
69 if(phydev->interrupts == PHY_INTERRUPT_ENABLED)
70 err = phy_write(phydev, MII_M1011_IMASK, MII_M1011_IMASK_INIT);
71 else
72 err = phy_write(phydev, MII_M1011_IMASK, MII_M1011_IMASK_CLEAR);
73
74 return err;
75}
76
77static int marvell_config_aneg(struct phy_device *phydev)
78{
79 int err;
80
81 /* The Marvell PHY has an errata which requires
82 * that certain registers get written in order
83 * to restart autonegotiation */
84 err = phy_write(phydev, MII_BMCR, BMCR_RESET);
85
86 if (err < 0)
87 return err;
88
89 err = phy_write(phydev, 0x1d, 0x1f);
90 if (err < 0)
91 return err;
92
93 err = phy_write(phydev, 0x1e, 0x200c);
94 if (err < 0)
95 return err;
96
97 err = phy_write(phydev, 0x1d, 0x5);
98 if (err < 0)
99 return err;
100
101 err = phy_write(phydev, 0x1e, 0);
102 if (err < 0)
103 return err;
104
105 err = phy_write(phydev, 0x1e, 0x100);
106 if (err < 0)
107 return err;
108
109
110 err = genphy_config_aneg(phydev);
111
112 return err;
113}
114
115
116static struct phy_driver m88e1101_driver = {
117 .phy_id = 0x01410c00,
118 .phy_id_mask = 0xffffff00,
119 .name = "Marvell 88E1101",
120 .features = PHY_GBIT_FEATURES,
121 .flags = PHY_HAS_INTERRUPT,
122 .config_aneg = &marvell_config_aneg,
123 .read_status = &genphy_read_status,
124 .ack_interrupt = &marvell_ack_interrupt,
125 .config_intr = &marvell_config_intr,
126 .driver = { .owner = THIS_MODULE,},
127};
128
129static int __init marvell_init(void)
130{
131 return phy_driver_register(&m88e1101_driver);
132}
133
134static void __exit marvell_exit(void)
135{
136 phy_driver_unregister(&m88e1101_driver);
137}
138
139module_init(marvell_init);
140module_exit(marvell_exit);