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);