drivers/net/fs_enet/mii-fixed.c

   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
  16 #include <linux/module.h>
  17 #include <linux/types.h>
  18 #include <linux/kernel.h>
  19 #include <linux/sched.h>
  20 #include <linux/string.h>
  21 #include <linux/ptrace.h>
  22 #include <linux/errno.h>
  23 #include <linux/ioport.h>
  24 #include <linux/slab.h>
  25 #include <linux/interrupt.h>
  26 #include <linux/pci.h>
  27 #include <linux/init.h>
  28 #include <linux/delay.h>
  29 #include <linux/netdevice.h>
  30 #include <linux/etherdevice.h>
  31 #include <linux/skbuff.h>
  32 #include <linux/spinlock.h>
  33 #include <linux/mii.h>
  34 #include <linux/ethtool.h>
  35 #include <linux/bitops.h>
  36
  37 #include <asm/pgtable.h>
  38 #include <asm/irq.h>
  39 #include <asm/uaccess.h>
  40
  41 #include "fs_enet.h"
  42
  43 static const u16 mii_regs[7] = {
  44         0x3100,
  45         0x786d,
  46         0x0fff,
  47         0x0fff,
  48         0x01e1,
  49         0x45e1,
  50         0x0003,
  51 };
  52
  53 static int mii_read(struct fs_enet_mii_bus *bus, int phy_id, int location)
  54 {
  55         int ret = 0;
  56
  57         if ((unsigned int)location >= ARRAY_SIZE(mii_regs))
  58                 return -1;
  59
  60         if (location != 5)
  61                 ret = mii_regs[location];
  62         else
  63                 ret = bus->fixed.lpa;
  64
  65         return ret;
  66 }
  67
  68 static void mii_write(struct fs_enet_mii_bus *bus, int phy_id, int location, int val)
  69 {
  70         /* do nothing */
  71 }
  72
  73 int fs_mii_fixed_init(struct fs_enet_mii_bus *bus)
  74 {
  75         const struct fs_mii_bus_info *bi = bus->bus_info;
  76
  77         bus->fixed.lpa = 0x45e1;        /* default 100Mb, full duplex */
  78
  79         /* if speed is fixed at 10Mb, remove 100Mb modes */
  80         if (bi->i.fixed.speed == 10)
  81                 bus->fixed.lpa &= ~LPA_100;
  82
  83         /* if duplex is half, remove full duplex modes */
  84         if (bi->i.fixed.duplex == 0)
  85                 bus->fixed.lpa &= ~LPA_DUPLEX;
  86
  87         bus->mii_read = mii_read;
  88         bus->mii_write = mii_write;
  89
  90         return 0;
  91 }