tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * drivers/net/phy/qsemi.c
3 *
4 * Driver for Quality Semiconductor 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/mii.h>
33#include <linux/ethtool.h>
34#include <linux/phy.h>
35
36#include <asm/io.h>
37#include <asm/irq.h>
38#include <asm/uaccess.h>
39
40/* ------------------------------------------------------------------------- */
41/* The Quality Semiconductor QS6612 is used on the RPX CLLF */
42
43/* register definitions */
44
45#define MII_QS6612_MCR 17 /* Mode Control Register */
46#define MII_QS6612_FTR 27 /* Factory Test Register */
47#define MII_QS6612_MCO 28 /* Misc. Control Register */
48#define MII_QS6612_ISR 29 /* Interrupt Source Register */
49#define MII_QS6612_IMR 30 /* Interrupt Mask Register */
50#define MII_QS6612_IMR_INIT 0x003a
51#define MII_QS6612_PCR 31 /* 100BaseTx PHY Control Reg. */
52
53#define QS6612_PCR_AN_COMPLETE 0x1000
54#define QS6612_PCR_RLBEN 0x0200
55#define QS6612_PCR_DCREN 0x0100
56#define QS6612_PCR_4B5BEN 0x0040
57#define QS6612_PCR_TX_ISOLATE 0x0020
58#define QS6612_PCR_MLT3_DIS 0x0002
59#define QS6612_PCR_SCRM_DESCRM 0x0001
60
61MODULE_DESCRIPTION("Quality Semiconductor PHY driver");
62MODULE_AUTHOR("Andy Fleming");
63MODULE_LICENSE("GPL");
64
65/* Returns 0, unless there's a write error */
66static int qs6612_config_init(struct phy_device *phydev)
67{
68 /* The PHY powers up isolated on the RPX,
69 * so send a command to allow operation.
70 * XXX - My docs indicate this should be 0x0940
71 * ...or something. The current value sets three
72 * reserved bits, bit 11, which specifies it should be
73 * set to one, bit 10, which specifies it should be set
74 * to 0, and bit 7, which doesn't specify. However, my
75 * docs are preliminary, and I will leave it like this
76 * until someone more knowledgable corrects me or it.
77 * -- Andy Fleming
78 */
79 return phy_write(phydev, MII_QS6612_PCR, 0x0dc0);
80}
81
82static int qs6612_ack_interrupt(struct phy_device *phydev)
83{
84 int err;
85
86 err = phy_read(phydev, MII_QS6612_ISR);
87
88 if (err < 0)
89 return err;
90
91 err = phy_read(phydev, MII_BMSR);
92
93 if (err < 0)
94 return err;
95
96 err = phy_read(phydev, MII_EXPANSION);
97
98 if (err < 0)
99 return err;
100
101 return 0;
102}
103
104static int qs6612_config_intr(struct phy_device *phydev)
105{
106 int err;
107 if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
108 err = phy_write(phydev, MII_QS6612_IMR,
109 MII_QS6612_IMR_INIT);
110 else
111 err = phy_write(phydev, MII_QS6612_IMR, 0);
112
113 return err;
114
115}
116
117static struct phy_driver qs6612_driver = {
118 .phy_id = 0x00181440,
119 .name = "QS6612",
120 .phy_id_mask = 0xfffffff0,
121 .features = PHY_BASIC_FEATURES,
122 .flags = PHY_HAS_INTERRUPT,
123 .config_init = qs6612_config_init,
124 .config_aneg = genphy_config_aneg,
125 .read_status = genphy_read_status,
126 .ack_interrupt = qs6612_ack_interrupt,
127 .config_intr = qs6612_config_intr,
128 .driver = { .owner = THIS_MODULE,},
129};
130
131static int __init qs6612_init(void)
132{
133 return phy_driver_register(&qs6612_driver);
134}
135
136static void __exit qs6612_exit(void)
137{
138 phy_driver_unregister(&qs6612_driver);
139}
140
141module_init(qs6612_init);
142module_exit(qs6612_exit);