1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
|
/*
* Combined Ethernet driver for Motorola MPC8xx and MPC82xx.
*
* Copyright (c) 2003 Intracom S.A.
* by Pantelis Antoniou <panto@intracom.gr>
*
* 2005 (c) MontaVista Software, Inc.
* Vitaly Bordug <vbordug@ru.mvista.com>
*
* This file is licensed under the terms of the GNU General Public License
* version 2. This program is licensed "as is" without any warranty of any
* kind, whether express or implied.
*/
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/ptrace.h>
#include <linux/errno.h>
#include <linux/ioport.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/spinlock.h>
#include <linux/mii.h>
#include <linux/ethtool.h>
#include <linux/bitops.h>
#include <linux/platform_device.h>
#include <asm/pgtable.h>
#include <asm/irq.h>
#include <asm/uaccess.h>
#include "fs_enet.h"
#include "fec.h"
/* Make MII read/write commands for the FEC.
*/
#define mk_mii_read(REG) (0x60020000 | ((REG & 0x1f) << 18))
#define mk_mii_write(REG, VAL) (0x50020000 | ((REG & 0x1f) << 18) | (VAL & 0xffff))
#define mk_mii_end 0
#define FEC_MII_LOOPS 10000
static int match_has_phy (struct device *dev, void* data)
{
struct platform_device* pdev = container_of(dev, struct platform_device, dev);
struct fs_platform_info* fpi;
if(strcmp(pdev->name, (char*)data))
{
return 0;
}
fpi = pdev->dev.platform_data;
if((fpi)&&(fpi->has_phy))
return 1;
return 0;
}
static int fs_mii_fec_init(struct fec_info* fec, struct fs_mii_fec_platform_info *fmpi)
{
struct resource *r;
fec_t *fecp;
char* name = "fsl-cpm-fec";
/* we need fec in order to be useful */
struct platform_device *fec_pdev =
container_of(bus_find_device(&platform_bus_type, NULL, name, match_has_phy),
struct platform_device, dev);
if(fec_pdev == NULL) {
printk(KERN_ERR"Unable to find PHY for %s", name);
return -ENODEV;
}
r = platform_get_resource_byname(fec_pdev, IORESOURCE_MEM, "regs");
fec->fecp = fecp = (fec_t*)ioremap(r->start,sizeof(fec_t));
fec->mii_speed = fmpi->mii_speed;
setbits32(&fecp->fec_r_cntrl, FEC_RCNTRL_MII_MODE); /* MII enable */
setbits32(&fecp->fec_ecntrl, FEC_ECNTRL_PINMUX | FEC_ECNTRL_ETHER_EN);
out_be32(&fecp->fec_ievent, FEC_ENET_MII);
out_be32(&fecp->fec_mii_speed, fec->mii_speed);
return 0;
}
static int fs_enet_fec_mii_read(struct mii_bus *bus , int phy_id, int location)
{
struct fec_info* fec = bus->priv;
fec_t *fecp = fec->fecp;
int i, ret = -1;
if ((in_be32(&fecp->fec_r_cntrl) & FEC_RCNTRL_MII_MODE) == 0)
BUG();
/* Add PHY address to register command. */
out_be32(&fecp->fec_mii_data, (phy_id << 23) | mk_mii_read(location));
for (i = 0; i < FEC_MII_LOOPS; i++)
if ((in_be32(&fecp->fec_ievent) & FEC_ENET_MII) != 0)
break;
if (i < FEC_MII_LOOPS) {
out_be32(&fecp->fec_ievent, FEC_ENET_MII);
ret = in_be32(&fecp->fec_mii_data) & 0xffff;
}
return ret;
}
static int fs_enet_fec_mii_write(struct mii_bus *bus, int phy_id, int location, u16 val)
{
struct fec_info* fec = bus->priv;
fec_t *fecp = fec->fecp;
int i;
/* this must never happen */
if ((in_be32(&fecp->fec_r_cntrl) & FEC_RCNTRL_MII_MODE) == 0)
BUG();
/* Add PHY address to register command. */
out_be32(&fecp->fec_mii_data, (phy_id << 23) | mk_mii_write(location, val));
for (i = 0; i < FEC_MII_LOOPS; i++)
if ((in_be32(&fecp->fec_ievent) & FEC_ENET_MII) != 0)
break;
if (i < FEC_MII_LOOPS)
out_be32(&fecp->fec_ievent, FEC_ENET_MII);
return 0;
}
static int fs_enet_fec_mii_reset(struct mii_bus *bus)
{
/* nothing here - for now */
return 0;
}
static int __devinit fs_enet_fec_mdio_probe(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct fs_mii_fec_platform_info *pdata;
struct mii_bus *new_bus;
struct fec_info *fec;
int err = 0;
if (NULL == dev)
return -EINVAL;
new_bus = kzalloc(sizeof(struct mii_bus), GFP_KERNEL);
if (NULL == new_bus)
return -ENOMEM;
fec = kzalloc(sizeof(struct fec_info), GFP_KERNEL);
if (NULL == fec)
return -ENOMEM;
new_bus->name = "FEC MII Bus",
new_bus->read = &fs_enet_fec_mii_read,
new_bus->write = &fs_enet_fec_mii_write,
new_bus->reset = &fs_enet_fec_mii_reset,
new_bus->id = pdev->id;
pdata = (struct fs_mii_fec_platform_info *)pdev->dev.platform_data;
if (NULL == pdata) {
printk(KERN_ERR "fs_enet FEC mdio %d: Missing platform data!\n", pdev->id);
return -ENODEV;
}
/*set up workspace*/
fs_mii_fec_init(fec, pdata);
new_bus->priv = fec;
new_bus->irq = pdata->irq;
new_bus->dev = dev;
dev_set_drvdata(dev, new_bus);
err = mdiobus_register(new_bus);
if (0 != err) {
printk (KERN_ERR "%s: Cannot register as MDIO bus\n",
new_bus->name);
goto bus_register_fail;
}
return 0;
bus_register_fail:
kfree(new_bus);
return err;
}
static int fs_enet_fec_mdio_remove(struct device *dev)
{
struct mii_bus *bus = dev_get_drvdata(dev);
mdiobus_unregister(bus);
dev_set_drvdata(dev, NULL);
kfree(bus->priv);
bus->priv = NULL;
kfree(bus);
return 0;
}
static struct device_driver fs_enet_fec_mdio_driver = {
.name = "fsl-cpm-fec-mdio",
.bus = &platform_bus_type,
.probe = fs_enet_fec_mdio_probe,
.remove = fs_enet_fec_mdio_remove,
};
int fs_enet_mdio_fec_init(void)
{
return driver_register(&fs_enet_fec_mdio_driver);
}
void fs_enet_mdio_fec_exit(void)
{
driver_unregister(&fs_enet_fec_mdio_driver);
}
|
