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 BUG_ON((in_be32(&fecp
->fec_r_cntrl
) & FEC_RCNTRL_MII_MODE
) == 0);
59 /* Add PHY address to register command. */
60 out_be32(&fecp
->fec_mii_data
, (phy_id
<< 23) | mk_mii_read(location
));
62 for (i
= 0; i
< FEC_MII_LOOPS
; i
++)
63 if ((in_be32(&fecp
->fec_ievent
) & FEC_ENET_MII
) != 0)
66 if (i
< FEC_MII_LOOPS
) {
67 out_be32(&fecp
->fec_ievent
, FEC_ENET_MII
);
68 ret
= in_be32(&fecp
->fec_mii_data
) & 0xffff;
74 static int fs_enet_fec_mii_write(struct mii_bus
*bus
, int phy_id
, int location
, u16 val
)
76 struct fec_info
* fec
= bus
->priv
;
77 fec_t __iomem
*fecp
= fec
->fecp
;
80 /* this must never happen */
81 BUG_ON((in_be32(&fecp
->fec_r_cntrl
) & FEC_RCNTRL_MII_MODE
) == 0);
83 /* Add PHY address to register command. */
84 out_be32(&fecp
->fec_mii_data
, (phy_id
<< 23) | mk_mii_write(location
, val
));
86 for (i
= 0; i
< FEC_MII_LOOPS
; i
++)
87 if ((in_be32(&fecp
->fec_ievent
) & FEC_ENET_MII
) != 0)
90 if (i
< FEC_MII_LOOPS
)
91 out_be32(&fecp
->fec_ievent
, FEC_ENET_MII
);
97 static int fs_enet_fec_mii_reset(struct mii_bus
*bus
)
99 /* nothing here - for now */
103 static int __devinit
fs_enet_mdio_probe(struct of_device
*ofdev
,
104 const struct of_device_id
*match
)
106 struct device_node
*np
= NULL
;
108 struct mii_bus
*new_bus
;
109 struct fec_info
*fec
;
110 int ret
= -ENOMEM
, i
;
112 new_bus
= mdiobus_alloc();
116 fec
= kzalloc(sizeof(struct fec_info
), GFP_KERNEL
);
121 new_bus
->name
= "FEC MII Bus";
122 new_bus
->read
= &fs_enet_fec_mii_read
;
123 new_bus
->write
= &fs_enet_fec_mii_write
;
124 new_bus
->reset
= &fs_enet_fec_mii_reset
;
126 ret
= of_address_to_resource(ofdev
->node
, 0, &res
);
130 snprintf(new_bus
->id
, MII_BUS_ID_SIZE
, "%x", res
.start
);
132 fec
->fecp
= ioremap(res
.start
, res
.end
- res
.start
+ 1);
136 fec
->mii_speed
= ((ppc_proc_freq
+ 4999999) / 5000000) << 1;
138 setbits32(&fec
->fecp
->fec_r_cntrl
, FEC_RCNTRL_MII_MODE
);
139 setbits32(&fec
->fecp
->fec_ecntrl
, FEC_ECNTRL_PINMUX
|
140 FEC_ECNTRL_ETHER_EN
);
141 out_be32(&fec
->fecp
->fec_ievent
, FEC_ENET_MII
);
142 out_be32(&fec
->fecp
->fec_mii_speed
, fec
->mii_speed
);
144 new_bus
->phy_mask
= ~0;
145 new_bus
->irq
= kmalloc(sizeof(int) * PHY_MAX_ADDR
, GFP_KERNEL
);
149 new_bus
->parent
= &ofdev
->dev
;
150 dev_set_drvdata(&ofdev
->dev
, new_bus
);
152 ret
= of_mdiobus_register(new_bus
, ofdev
->node
);
159 dev_set_drvdata(&ofdev
->dev
, NULL
);
167 mdiobus_free(new_bus
);
172 static int fs_enet_mdio_remove(struct of_device
*ofdev
)
174 struct mii_bus
*bus
= dev_get_drvdata(&ofdev
->dev
);
175 struct fec_info
*fec
= bus
->priv
;
177 mdiobus_unregister(bus
);
178 dev_set_drvdata(&ofdev
->dev
, NULL
);
187 static struct of_device_id fs_enet_mdio_fec_match
[] = {
189 .compatible
= "fsl,pq1-fec-mdio",
194 static struct of_platform_driver fs_enet_fec_mdio_driver
= {
195 .name
= "fsl-fec-mdio",
196 .match_table
= fs_enet_mdio_fec_match
,
197 .probe
= fs_enet_mdio_probe
,
198 .remove
= fs_enet_mdio_remove
,
201 static int fs_enet_mdio_fec_init(void)
203 return of_register_platform_driver(&fs_enet_fec_mdio_driver
);
206 static void fs_enet_mdio_fec_exit(void)
208 of_unregister_platform_driver(&fs_enet_fec_mdio_driver
);
211 module_init(fs_enet_mdio_fec_init
);
212 module_exit(fs_enet_mdio_fec_exit
);