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.
16 #include <linux/config.h>
17 #include <linux/module.h>
18 #include <linux/types.h>
19 #include <linux/kernel.h>
20 #include <linux/sched.h>
21 #include <linux/string.h>
22 #include <linux/ptrace.h>
23 #include <linux/errno.h>
24 #include <linux/ioport.h>
25 #include <linux/slab.h>
26 #include <linux/interrupt.h>
27 #include <linux/pci.h>
28 #include <linux/init.h>
29 #include <linux/delay.h>
30 #include <linux/netdevice.h>
31 #include <linux/etherdevice.h>
32 #include <linux/skbuff.h>
33 #include <linux/spinlock.h>
34 #include <linux/mii.h>
35 #include <linux/ethtool.h>
36 #include <linux/bitops.h>
37 #include <linux/platform_device.h>
39 #include <asm/pgtable.h>
41 #include <asm/uaccess.h>
46 /* Make MII read/write commands for the FEC.
48 #define mk_mii_read(REG) (0x60020000 | ((REG & 0x1f) << 18))
49 #define mk_mii_write(REG, VAL) (0x50020000 | ((REG & 0x1f) << 18) | (VAL & 0xffff))
52 #define FEC_MII_LOOPS 10000
54 static int match_has_phy (struct device *dev, void* data)
56 struct platform_device* pdev = container_of(dev, struct platform_device, dev);
57 struct fs_platform_info* fpi;
58 if(strcmp(pdev->name, (char*)data))
63 fpi = pdev->dev.platform_data;
64 if((fpi)&&(fpi->has_phy))
69 static int fs_mii_fec_init(struct fec_info* fec, struct fs_mii_fec_platform_info *fmpi)
73 char* name = "fsl-cpm-fec";
75 /* we need fec in order to be useful */
76 struct platform_device *fec_pdev =
77 container_of(bus_find_device(&platform_bus_type, NULL, name, match_has_phy),
78 struct platform_device, dev);
80 if(fec_pdev == NULL) {
81 printk(KERN_ERR"Unable to find PHY for %s", name);
85 r = platform_get_resource_byname(fec_pdev, IORESOURCE_MEM, "regs");
87 fec->fecp = fecp = (fec_t*)ioremap(r->start,sizeof(fec_t));
88 fec->mii_speed = fmpi->mii_speed;
90 setbits32(&fecp->fec_r_cntrl, FEC_RCNTRL_MII_MODE); /* MII enable */
91 setbits32(&fecp->fec_ecntrl, FEC_ECNTRL_PINMUX | FEC_ECNTRL_ETHER_EN);
92 out_be32(&fecp->fec_ievent, FEC_ENET_MII);
93 out_be32(&fecp->fec_mii_speed, fec->mii_speed);
98 static int fs_enet_fec_mii_read(struct mii_bus *bus , int phy_id, int location)
100 struct fec_info* fec = bus->priv;
101 fec_t *fecp = fec->fecp;
104 if ((in_be32(&fecp->fec_r_cntrl) & FEC_RCNTRL_MII_MODE) == 0)
107 /* Add PHY address to register command. */
108 out_be32(&fecp->fec_mii_data, (phy_id << 23) | mk_mii_read(location));
110 for (i = 0; i < FEC_MII_LOOPS; i++)
111 if ((in_be32(&fecp->fec_ievent) & FEC_ENET_MII) != 0)
114 if (i < FEC_MII_LOOPS) {
115 out_be32(&fecp->fec_ievent, FEC_ENET_MII);
116 ret = in_be32(&fecp->fec_mii_data) & 0xffff;
123 static int fs_enet_fec_mii_write(struct mii_bus *bus, int phy_id, int location, u16 val)
125 struct fec_info* fec = bus->priv;
126 fec_t *fecp = fec->fecp;
129 /* this must never happen */
130 if ((in_be32(&fecp->fec_r_cntrl) & FEC_RCNTRL_MII_MODE) == 0)
133 /* Add PHY address to register command. */
134 out_be32(&fecp->fec_mii_data, (phy_id << 23) | mk_mii_write(location, val));
136 for (i = 0; i < FEC_MII_LOOPS; i++)
137 if ((in_be32(&fecp->fec_ievent) & FEC_ENET_MII) != 0)
140 if (i < FEC_MII_LOOPS)
141 out_be32(&fecp->fec_ievent, FEC_ENET_MII);
147 static int fs_enet_fec_mii_reset(struct mii_bus *bus)
149 /* nothing here - for now */
153 static int __devinit fs_enet_fec_mdio_probe(struct device *dev)
155 struct platform_device *pdev = to_platform_device(dev);
156 struct fs_mii_fec_platform_info *pdata;
157 struct mii_bus *new_bus;
158 struct fec_info *fec;
162 new_bus = kzalloc(sizeof(struct mii_bus), GFP_KERNEL);
167 fec = kzalloc(sizeof(struct fec_info), GFP_KERNEL);
172 new_bus->name = "FEC MII Bus",
173 new_bus->read = &fs_enet_fec_mii_read,
174 new_bus->write = &fs_enet_fec_mii_write,
175 new_bus->reset = &fs_enet_fec_mii_reset,
176 new_bus->id = pdev->id;
178 pdata = (struct fs_mii_fec_platform_info *)pdev->dev.platform_data;
181 printk(KERN_ERR "fs_enet FEC mdio %d: Missing platform data!\n", pdev->id);
187 fs_mii_fec_init(fec, pdata);
190 new_bus->irq = pdata->irq;
193 dev_set_drvdata(dev, new_bus);
195 err = mdiobus_register(new_bus);
198 printk (KERN_ERR "%s: Cannot register as MDIO bus\n",
200 goto bus_register_fail;
212 static int fs_enet_fec_mdio_remove(struct device *dev)
214 struct mii_bus *bus = dev_get_drvdata(dev);
216 mdiobus_unregister(bus);
218 dev_set_drvdata(dev, NULL);
227 static struct device_driver fs_enet_fec_mdio_driver = {
228 .name = "fsl-cpm-fec-mdio",
229 .bus = &platform_bus_type,
230 .probe = fs_enet_fec_mdio_probe,
231 .remove = fs_enet_fec_mdio_remove,
234 int fs_enet_mdio_fec_init(void)
236 return driver_register(&fs_enet_fec_mdio_driver);
239 void fs_enet_mdio_fec_exit(void)
241 driver_unregister(&fs_enet_fec_mdio_driver);