1/* 2 * Combined Ethernet driver for Motorola MPC8xx and MPC82xx. 3 * 4 * Copyright (c) 2003 Intracom S.A. 5 * by Pantelis Antoniou <panto@intracom.gr> 6 * 7 * 2005 (c) MontaVista Software, Inc. 8 * Vitaly Bordug <vbordug@ru.mvista.com> 9 * 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. 13 */ 14 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 35#include <asm/pgtable.h> 36#include <asm/irq.h> 37#include <asm/uaccess.h> 38 39#include "fs_enet.h" 40#include "fec.h" 41 42/* Make MII read/write commands for the FEC. 43*/ 44#define mk_mii_read(REG) (0x60020000 | ((REG & 0x1f) << 18)) 45#define mk_mii_write(REG, VAL) (0x50020000 | ((REG & 0x1f) << 18) | (VAL & 0xffff)) 46#define mk_mii_end 0 47 48#define FEC_MII_LOOPS 10000 49 50static int match_has_phy (struct device *dev, void* data) 51{ 52 struct platform_device* pdev = container_of(dev, struct platform_device, dev); 53 struct fs_platform_info* fpi; 54 if(strcmp(pdev->name, (char*)data)) 55 { 56 return 0; 57 } 58 59 fpi = pdev->dev.platform_data; 60 if((fpi)&&(fpi->has_phy)) 61 return 1; 62 return 0; 63} 64 65static int fs_mii_fec_init(struct fec_info* fec, struct fs_mii_fec_platform_info *fmpi) 66{ 67 struct resource *r; 68 fec_t *fecp; 69 char* name = "fsl-cpm-fec"; 70 71 /* we need fec in order to be useful */ 72 struct platform_device *fec_pdev = 73 container_of(bus_find_device(&platform_bus_type, NULL, name, match_has_phy), 74 struct platform_device, dev); 75 76 if(fec_pdev == NULL) { 77 printk(KERN_ERR"Unable to find PHY for %s", name); 78 return -ENODEV; 79 } 80 81 r = platform_get_resource_byname(fec_pdev, IORESOURCE_MEM, "regs"); 82 83 fec->fecp = fecp = (fec_t*)ioremap(r->start,sizeof(fec_t)); 84 fec->mii_speed = fmpi->mii_speed; 85 86 setbits32(&fecp->fec_r_cntrl, FEC_RCNTRL_MII_MODE); /* MII enable */ 87 setbits32(&fecp->fec_ecntrl, FEC_ECNTRL_PINMUX | FEC_ECNTRL_ETHER_EN); 88 out_be32(&fecp->fec_ievent, FEC_ENET_MII); 89 out_be32(&fecp->fec_mii_speed, fec->mii_speed); 90 91 return 0; 92} 93 94static int fs_enet_fec_mii_read(struct mii_bus *bus , int phy_id, int location) 95{ 96 struct fec_info* fec = bus->priv; 97 fec_t *fecp = fec->fecp; 98 int i, ret = -1; 99 100 if ((in_be32(&fecp->fec_r_cntrl) & FEC_RCNTRL_MII_MODE) == 0) 101 BUG(); 102 103 /* Add PHY address to register command. */ 104 out_be32(&fecp->fec_mii_data, (phy_id << 23) | mk_mii_read(location)); 105 106 for (i = 0; i < FEC_MII_LOOPS; i++) 107 if ((in_be32(&fecp->fec_ievent) & FEC_ENET_MII) != 0) 108 break; 109 110 if (i < FEC_MII_LOOPS) { 111 out_be32(&fecp->fec_ievent, FEC_ENET_MII); 112 ret = in_be32(&fecp->fec_mii_data) & 0xffff; 113 } 114 115 return ret; 116 117} 118 119static int fs_enet_fec_mii_write(struct mii_bus *bus, int phy_id, int location, u16 val) 120{ 121 struct fec_info* fec = bus->priv; 122 fec_t *fecp = fec->fecp; 123 int i; 124 125 /* this must never happen */ 126 if ((in_be32(&fecp->fec_r_cntrl) & FEC_RCNTRL_MII_MODE) == 0) 127 BUG(); 128 129 /* Add PHY address to register command. */ 130 out_be32(&fecp->fec_mii_data, (phy_id << 23) | mk_mii_write(location, val)); 131 132 for (i = 0; i < FEC_MII_LOOPS; i++) 133 if ((in_be32(&fecp->fec_ievent) & FEC_ENET_MII) != 0) 134 break; 135 136 if (i < FEC_MII_LOOPS) 137 out_be32(&fecp->fec_ievent, FEC_ENET_MII); 138 139 return 0; 140 141} 142 143static int fs_enet_fec_mii_reset(struct mii_bus *bus) 144{ 145 /* nothing here - for now */ 146 return 0; 147} 148 149static int __devinit fs_enet_fec_mdio_probe(struct device *dev) 150{ 151 struct platform_device *pdev = to_platform_device(dev); 152 struct fs_mii_fec_platform_info *pdata; 153 struct mii_bus *new_bus; 154 struct fec_info *fec; 155 int err = 0; 156 if (NULL == dev) 157 return -EINVAL; 158 new_bus = kzalloc(sizeof(struct mii_bus), GFP_KERNEL); 159 160 if (NULL == new_bus) 161 return -ENOMEM; 162 163 fec = kzalloc(sizeof(struct fec_info), GFP_KERNEL); 164 165 if (NULL == fec) 166 return -ENOMEM; 167 168 new_bus->name = "FEC MII Bus", 169 new_bus->read = &fs_enet_fec_mii_read, 170 new_bus->write = &fs_enet_fec_mii_write, 171 new_bus->reset = &fs_enet_fec_mii_reset, 172 new_bus->id = pdev->id; 173 174 pdata = (struct fs_mii_fec_platform_info *)pdev->dev.platform_data; 175 176 if (NULL == pdata) { 177 printk(KERN_ERR "fs_enet FEC mdio %d: Missing platform data!\n", pdev->id); 178 return -ENODEV; 179 } 180 181 /*set up workspace*/ 182 183 fs_mii_fec_init(fec, pdata); 184 new_bus->priv = fec; 185 186 new_bus->irq = pdata->irq; 187 188 new_bus->dev = dev; 189 dev_set_drvdata(dev, new_bus); 190 191 err = mdiobus_register(new_bus); 192 193 if (0 != err) { 194 printk (KERN_ERR "%s: Cannot register as MDIO bus\n", 195 new_bus->name); 196 goto bus_register_fail; 197 } 198 199 return 0; 200 201bus_register_fail: 202 kfree(new_bus); 203 204 return err; 205} 206 207 208static int fs_enet_fec_mdio_remove(struct device *dev) 209{ 210 struct mii_bus *bus = dev_get_drvdata(dev); 211 212 mdiobus_unregister(bus); 213 214 dev_set_drvdata(dev, NULL); 215 kfree(bus->priv); 216 217 bus->priv = NULL; 218 kfree(bus); 219 220 return 0; 221} 222 223static struct device_driver fs_enet_fec_mdio_driver = { 224 .name = "fsl-cpm-fec-mdio", 225 .bus = &platform_bus_type, 226 .probe = fs_enet_fec_mdio_probe, 227 .remove = fs_enet_fec_mdio_remove, 228}; 229 230int fs_enet_mdio_fec_init(void) 231{ 232 return driver_register(&fs_enet_fec_mdio_driver); 233} 234 235void fs_enet_mdio_fec_exit(void) 236{ 237 driver_unregister(&fs_enet_fec_mdio_driver); 238} 239