2 * Combined Ethernet driver for Motorola MPC8xx and MPC82xx.
4 * Copyright (c) 2003 Intracom S.A.
5 * by Pantelis Antoniou <panto@intracom.gr>
7 * 2005 (c) MontaVista Software, Inc.
8 * Vitaly Bordug <vbordug@ru.mvista.com>
10 * This file is licensed under the terms of the GNU General Public License
11 * version 2. This program is licensed "as is" without any warranty of any
12 * kind, whether express or implied.
15 #include <linux/module.h>
16 #include <linux/types.h>
17 #include <linux/kernel.h>
18 #include <linux/string.h>
19 #include <linux/ptrace.h>
20 #include <linux/errno.h>
21 #include <linux/ioport.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/mii.h>
31 #include <linux/ethtool.h>
32 #include <linux/bitops.h>
33 #include <linux/platform_device.h>
34 #include <linux/of_platform.h>
36 #include <asm/pgtable.h>
38 #include <asm/uaccess.h>
43 /* Make MII read/write commands for the FEC.
45 #define mk_mii_read(REG) (0x60020000 | ((REG & 0x1f) << 18))
46 #define mk_mii_write(REG, VAL) (0x50020000 | ((REG & 0x1f) << 18) | (VAL & 0xffff))
49 #define FEC_MII_LOOPS 10000
51 static int fs_enet_fec_mii_read(struct mii_bus
*bus
, int phy_id
, int location
)
53 struct fec_info
* fec
= bus
->priv
;
54 fec_t __iomem
*fecp
= fec
->fecp
;
57 if ((in_be32(&fecp
->fec_r_cntrl
) & FEC_RCNTRL_MII_MODE
) == 0)
60 /* Add PHY address to register command. */
61 out_be32(&fecp
->fec_mii_data
, (phy_id
<< 23) | mk_mii_read(location
));
63 for (i
= 0; i
< FEC_MII_LOOPS
; i
++)
64 if ((in_be32(&fecp
->fec_ievent
) & FEC_ENET_MII
) != 0)
67 if (i
< FEC_MII_LOOPS
) {
68 out_be32(&fecp
->fec_ievent
, FEC_ENET_MII
);
69 ret
= in_be32(&fecp
->fec_mii_data
) & 0xffff;
75 static int fs_enet_fec_mii_write(struct mii_bus
*bus
, int phy_id
, int location
, u16 val
)
77 struct fec_info
* fec
= bus
->priv
;
78 fec_t __iomem
*fecp
= fec
->fecp
;
81 /* this must never happen */
82 if ((in_be32(&fecp
->fec_r_cntrl
) & FEC_RCNTRL_MII_MODE
) == 0)
85 /* Add PHY address to register command. */
86 out_be32(&fecp
->fec_mii_data
, (phy_id
<< 23) | mk_mii_write(location
, val
));
88 for (i
= 0; i
< FEC_MII_LOOPS
; i
++)
89 if ((in_be32(&fecp
->fec_ievent
) & FEC_ENET_MII
) != 0)
92 if (i
< FEC_MII_LOOPS
)
93 out_be32(&fecp
->fec_ievent
, FEC_ENET_MII
);
99 static int fs_enet_fec_mii_reset(struct mii_bus
*bus
)
101 /* nothing here - for now */
105 static void __devinit
add_phy(struct mii_bus
*bus
, struct device_node
*np
)
110 data
= of_get_property(np
, "reg", &len
);
111 if (!data
|| len
!= 4)
115 bus
->phy_mask
&= ~(1 << id
);
117 irq
= of_irq_to_resource(np
, 0, NULL
);
122 static int __devinit
fs_enet_mdio_probe(struct of_device
*ofdev
,
123 const struct of_device_id
*match
)
125 struct device_node
*np
= NULL
;
127 struct mii_bus
*new_bus
;
128 struct fec_info
*fec
;
129 int ret
= -ENOMEM
, i
;
131 new_bus
= kzalloc(sizeof(struct mii_bus
), GFP_KERNEL
);
135 fec
= kzalloc(sizeof(struct fec_info
), GFP_KERNEL
);
140 new_bus
->name
= "FEC MII Bus";
141 new_bus
->read
= &fs_enet_fec_mii_read
;
142 new_bus
->write
= &fs_enet_fec_mii_write
;
143 new_bus
->reset
= &fs_enet_fec_mii_reset
;
145 ret
= of_address_to_resource(ofdev
->node
, 0, &res
);
149 snprintf(new_bus
->id
, MII_BUS_ID_SIZE
, "%x", res
.start
);
151 fec
->fecp
= ioremap(res
.start
, res
.end
- res
.start
+ 1);
155 fec
->mii_speed
= ((ppc_proc_freq
+ 4999999) / 5000000) << 1;
157 setbits32(&fec
->fecp
->fec_r_cntrl
, FEC_RCNTRL_MII_MODE
);
158 setbits32(&fec
->fecp
->fec_ecntrl
, FEC_ECNTRL_PINMUX
|
159 FEC_ECNTRL_ETHER_EN
);
160 out_be32(&fec
->fecp
->fec_ievent
, FEC_ENET_MII
);
161 out_be32(&fec
->fecp
->fec_mii_speed
, fec
->mii_speed
);
163 new_bus
->phy_mask
= ~0;
164 new_bus
->irq
= kmalloc(sizeof(int) * PHY_MAX_ADDR
, GFP_KERNEL
);
168 for (i
= 0; i
< PHY_MAX_ADDR
; i
++)
169 new_bus
->irq
[i
] = -1;
171 while ((np
= of_get_next_child(ofdev
->node
, np
)))
172 if (!strcmp(np
->type
, "ethernet-phy"))
173 add_phy(new_bus
, np
);
175 new_bus
->dev
= &ofdev
->dev
;
176 dev_set_drvdata(&ofdev
->dev
, new_bus
);
178 ret
= mdiobus_register(new_bus
);
185 dev_set_drvdata(&ofdev
->dev
, NULL
);
198 static int fs_enet_mdio_remove(struct of_device
*ofdev
)
200 struct mii_bus
*bus
= dev_get_drvdata(&ofdev
->dev
);
201 struct fec_info
*fec
= bus
->priv
;
203 mdiobus_unregister(bus
);
204 dev_set_drvdata(&ofdev
->dev
, NULL
);
213 static struct of_device_id fs_enet_mdio_fec_match
[] = {
215 .compatible
= "fsl,pq1-fec-mdio",
220 static struct of_platform_driver fs_enet_fec_mdio_driver
= {
221 .name
= "fsl-fec-mdio",
222 .match_table
= fs_enet_mdio_fec_match
,
223 .probe
= fs_enet_mdio_probe
,
224 .remove
= fs_enet_mdio_remove
,
227 static int fs_enet_mdio_fec_init(void)
229 return of_register_platform_driver(&fs_enet_fec_mdio_driver
);
232 static void fs_enet_mdio_fec_exit(void)
234 of_unregister_platform_driver(&fs_enet_fec_mdio_driver
);
237 module_init(fs_enet_mdio_fec_init
);
238 module_exit(fs_enet_mdio_fec_exit
);