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 void __devinit add_phy(struct mii_bus *bus, struct device_node *np)
108 data = of_get_property(np, "reg", &len);
109 if (!data || len != 4)
113 bus->phy_mask &= ~(1 << id);
115 irq = of_irq_to_resource(np, 0, NULL);
120 static int __devinit fs_enet_mdio_probe(struct of_device *ofdev,
121 const struct of_device_id *match)
123 struct device_node *np = NULL;
125 struct mii_bus *new_bus;
126 struct fec_info *fec;
127 int ret = -ENOMEM, i;
129 new_bus = mdiobus_alloc();
133 fec = kzalloc(sizeof(struct fec_info), GFP_KERNEL);
138 new_bus->name = "FEC MII Bus";
139 new_bus->read = &fs_enet_fec_mii_read;
140 new_bus->write = &fs_enet_fec_mii_write;
141 new_bus->reset = &fs_enet_fec_mii_reset;
143 ret = of_address_to_resource(ofdev->node, 0, &res);
147 snprintf(new_bus->id, MII_BUS_ID_SIZE, "%x", res.start);
149 fec->fecp = ioremap(res.start, res.end - res.start + 1);
153 fec->mii_speed = ((ppc_proc_freq + 4999999) / 5000000) << 1;
155 setbits32(&fec->fecp->fec_r_cntrl, FEC_RCNTRL_MII_MODE);
156 setbits32(&fec->fecp->fec_ecntrl, FEC_ECNTRL_PINMUX |
157 FEC_ECNTRL_ETHER_EN);
158 out_be32(&fec->fecp->fec_ievent, FEC_ENET_MII);
159 out_be32(&fec->fecp->fec_mii_speed, fec->mii_speed);
161 new_bus->phy_mask = ~0;
162 new_bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
166 for (i = 0; i < PHY_MAX_ADDR; i++)
167 new_bus->irq[i] = -1;
169 while ((np = of_get_next_child(ofdev->node, np)))
170 if (!strcmp(np->type, "ethernet-phy"))
171 add_phy(new_bus, np);
173 new_bus->parent = &ofdev->dev;
174 dev_set_drvdata(&ofdev->dev, new_bus);
176 ret = mdiobus_register(new_bus);
183 dev_set_drvdata(&ofdev->dev, NULL);
191 mdiobus_free(new_bus);
196 static int fs_enet_mdio_remove(struct of_device *ofdev)
198 struct mii_bus *bus = dev_get_drvdata(&ofdev->dev);
199 struct fec_info *fec = bus->priv;
201 mdiobus_unregister(bus);
202 dev_set_drvdata(&ofdev->dev, NULL);
211 static struct of_device_id fs_enet_mdio_fec_match[] = {
213 .compatible = "fsl,pq1-fec-mdio",
218 static struct of_platform_driver fs_enet_fec_mdio_driver = {
219 .name = "fsl-fec-mdio",
220 .match_table = fs_enet_mdio_fec_match,
221 .probe = fs_enet_mdio_probe,
222 .remove = fs_enet_mdio_remove,
225 static int fs_enet_mdio_fec_init(void)
227 return of_register_platform_driver(&fs_enet_fec_mdio_driver);
230 static void fs_enet_mdio_fec_exit(void)
232 of_unregister_platform_driver(&fs_enet_fec_mdio_driver);
235 module_init(fs_enet_mdio_fec_init);
236 module_exit(fs_enet_mdio_fec_exit);