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android_kernel_xiaomi_sm8350/drivers/net/fs_enet/fs_enet-mii.c
Jörn Engel 6ab3d5624e Remove obsolete #include <linux/config.h> 
Signed-off-by: Jörn Engel <joern@wohnheim.fh-wedel.de>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
2006-06-30 19:25:36 +02:00

506 lines
12 KiB
C
Raw Blame History

/*
* Combined Ethernet driver for Motorola MPC8xx and MPC82xx.
*
* Copyright (c) 2003 Intracom S.A.
* by Pantelis Antoniou <panto@intracom.gr>
*
* 2005 (c) MontaVista Software, Inc.
* Vitaly Bordug <vbordug@ru.mvista.com>
*
* Heavily based on original FEC driver by Dan Malek <dan@embeddededge.com>
* and modifications by Joakim Tjernlund <joakim.tjernlund@lumentis.se>
*
* This file is licensed under the terms of the GNU General Public License
* version 2. This program is licensed "as is" without any warranty of any
* kind, whether express or implied.
*/
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/string.h>
#include <linux/ptrace.h>
#include <linux/errno.h>
#include <linux/ioport.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/spinlock.h>
#include <linux/mii.h>
#include <linux/ethtool.h>
#include <linux/bitops.h>
#include <asm/pgtable.h>
#include <asm/irq.h>
#include <asm/uaccess.h>
#include "fs_enet.h"
/*************************************************/
/*
* Generic PHY support.
* Should work for all PHYs, but link change is detected by polling
*/
static void generic_timer_callback(unsigned long data)
{
struct net_device *dev = (struct net_device *)data;
struct fs_enet_private *fep = netdev_priv(dev);
fep->phy_timer_list.expires = jiffies + HZ / 2;
add_timer(&fep->phy_timer_list);
fs_mii_link_status_change_check(dev, 0);
}
static void generic_startup(struct net_device *dev)
{
struct fs_enet_private *fep = netdev_priv(dev);
fep->phy_timer_list.expires = jiffies + HZ / 2; /* every 500ms */
fep->phy_timer_list.data = (unsigned long)dev;
fep->phy_timer_list.function = generic_timer_callback;
add_timer(&fep->phy_timer_list);
}
static void generic_shutdown(struct net_device *dev)
{
struct fs_enet_private *fep = netdev_priv(dev);
del_timer_sync(&fep->phy_timer_list);
}
/* ------------------------------------------------------------------------- */
/* The Davicom DM9161 is used on the NETTA board */
/* register definitions */
#define MII_DM9161_ANAR 4 /* Aux. Config Register */
#define MII_DM9161_ACR 16 /* Aux. Config Register */
#define MII_DM9161_ACSR 17 /* Aux. Config/Status Register */
#define MII_DM9161_10TCSR 18 /* 10BaseT Config/Status Reg. */
#define MII_DM9161_INTR 21 /* Interrupt Register */
#define MII_DM9161_RECR 22 /* Receive Error Counter Reg. */
#define MII_DM9161_DISCR 23 /* Disconnect Counter Register */
static void dm9161_startup(struct net_device *dev)
{
struct fs_enet_private *fep = netdev_priv(dev);
fs_mii_write(dev, fep->mii_if.phy_id, MII_DM9161_INTR, 0x0000);
/* Start autonegotiation */
fs_mii_write(dev, fep->mii_if.phy_id, MII_BMCR, 0x1200);
set_current_state(TASK_UNINTERRUPTIBLE);
schedule_timeout(HZ*8);
}
static void dm9161_ack_int(struct net_device *dev)
{
struct fs_enet_private *fep = netdev_priv(dev);
fs_mii_read(dev, fep->mii_if.phy_id, MII_DM9161_INTR);
}
static void dm9161_shutdown(struct net_device *dev)
{
struct fs_enet_private *fep = netdev_priv(dev);
fs_mii_write(dev, fep->mii_if.phy_id, MII_DM9161_INTR, 0x0f00);
}
/**********************************************************************************/
static const struct phy_info phy_info[] = {
{
.id = 0x00181b88,
.name = "DM9161",
.startup = dm9161_startup,
.ack_int = dm9161_ack_int,
.shutdown = dm9161_shutdown,
}, {
.id = 0,
.name = "GENERIC",
.startup = generic_startup,
.shutdown = generic_shutdown,
},
};
/**********************************************************************************/
static int phy_id_detect(struct net_device *dev)
{
struct fs_enet_private *fep = netdev_priv(dev);
const struct fs_platform_info *fpi = fep->fpi;
struct fs_enet_mii_bus *bus = fep->mii_bus;
int i, r, start, end, phytype, physubtype;
const struct phy_info *phy;
int phy_hwid, phy_id;
phy_hwid = -1;
fep->phy = NULL;
/* auto-detect? */
if (fpi->phy_addr == -1) {
start = 1;
end = 32;
} else { /* direct */
start = fpi->phy_addr;
end = start + 1;
}
for (phy_id = start; phy_id < end; phy_id++) {
/* skip already used phy addresses on this bus */
if (bus->usage_map & (1 << phy_id))
continue;
r = fs_mii_read(dev, phy_id, MII_PHYSID1);
if (r == -1 || (phytype = (r & 0xffff)) == 0xffff)
continue;
r = fs_mii_read(dev, phy_id, MII_PHYSID2);
if (r == -1 || (physubtype = (r & 0xffff)) == 0xffff)
continue;
phy_hwid = (phytype << 16) | physubtype;
if (phy_hwid != -1)
break;
}
if (phy_hwid == -1) {
printk(KERN_ERR DRV_MODULE_NAME
": %s No PHY detected! range=0x%02x-0x%02x\n",
dev->name, start, end);
return -1;
}
for (i = 0, phy = phy_info; i < ARRAY_SIZE(phy_info); i++, phy++)
if (phy->id == (phy_hwid >> 4) || phy->id == 0)
break;
if (i >= ARRAY_SIZE(phy_info)) {
printk(KERN_ERR DRV_MODULE_NAME
": %s PHY id 0x%08x is not supported!\n",
dev->name, phy_hwid);
return -1;
}
fep->phy = phy;
/* mark this address as used */
bus->usage_map |= (1 << phy_id);
printk(KERN_INFO DRV_MODULE_NAME
": %s Phy @ 0x%x, type %s (0x%08x)%s\n",
dev->name, phy_id, fep->phy->name, phy_hwid,
fpi->phy_addr == -1 ? " (auto-detected)" : "");
return phy_id;
}
void fs_mii_startup(struct net_device *dev)
{
struct fs_enet_private *fep = netdev_priv(dev);
if (fep->phy->startup)
(*fep->phy->startup) (dev);
}
void fs_mii_shutdown(struct net_device *dev)
{
struct fs_enet_private *fep = netdev_priv(dev);
if (fep->phy->shutdown)
(*fep->phy->shutdown) (dev);
}
void fs_mii_ack_int(struct net_device *dev)
{
struct fs_enet_private *fep = netdev_priv(dev);
if (fep->phy->ack_int)
(*fep->phy->ack_int) (dev);
}
#define MII_LINK 0x0001
#define MII_HALF 0x0002
#define MII_FULL 0x0004
#define MII_BASE4 0x0008
#define MII_10M 0x0010
#define MII_100M 0x0020
#define MII_1G 0x0040
#define MII_10G 0x0080
/* return full mii info at one gulp, with a usable form */
static unsigned int mii_full_status(struct mii_if_info *mii)
{
unsigned int status;
int bmsr, adv, lpa, neg;
struct fs_enet_private* fep = netdev_priv(mii->dev);
/* first, a dummy read, needed to latch some MII phys */
(void)mii->mdio_read(mii->dev, mii->phy_id, MII_BMSR);
bmsr = mii->mdio_read(mii->dev, mii->phy_id, MII_BMSR);
/* no link */
if ((bmsr & BMSR_LSTATUS) == 0)
return 0;
status = MII_LINK;
/* Lets look what ANEG says if it's supported - otherwize we shall
take the right values from the platform info*/
if(!mii->force_media) {
/* autoneg not completed; don't bother */
if ((bmsr & BMSR_ANEGCOMPLETE) == 0)
return 0;
adv = (*mii->mdio_read)(mii->dev, mii->phy_id, MII_ADVERTISE);
lpa = (*mii->mdio_read)(mii->dev, mii->phy_id, MII_LPA);
neg = lpa & adv;
} else {
neg = fep->fpi->bus_info->lpa;
}
if (neg & LPA_100FULL)
status |= MII_FULL | MII_100M;
else if (neg & LPA_100BASE4)
status |= MII_FULL | MII_BASE4 | MII_100M;
else if (neg & LPA_100HALF)
status |= MII_HALF | MII_100M;
else if (neg & LPA_10FULL)
status |= MII_FULL | MII_10M;
else
status |= MII_HALF | MII_10M;
return status;
}
void fs_mii_link_status_change_check(struct net_device *dev, int init_media)
{
struct fs_enet_private *fep = netdev_priv(dev);
struct mii_if_info *mii = &fep->mii_if;
unsigned int mii_status;
int ok_to_print, link, duplex, speed;
unsigned long flags;
ok_to_print = netif_msg_link(fep);
mii_status = mii_full_status(mii);
if (!init_media && mii_status == fep->last_mii_status)
return;
fep->last_mii_status = mii_status;
link = !!(mii_status & MII_LINK);
duplex = !!(mii_status & MII_FULL);
speed = (mii_status & MII_100M) ? 100 : 10;
if (link == 0) {
netif_carrier_off(mii->dev);
netif_stop_queue(dev);
if (!init_media) {
spin_lock_irqsave(&fep->lock, flags);
(*fep->ops->stop)(dev);
spin_unlock_irqrestore(&fep->lock, flags);
}
if (ok_to_print)
printk(KERN_INFO "%s: link down\n", mii->dev->name);
} else {
mii->full_duplex = duplex;
netif_carrier_on(mii->dev);
spin_lock_irqsave(&fep->lock, flags);
fep->duplex = duplex;
fep->speed = speed;
(*fep->ops->restart)(dev);
spin_unlock_irqrestore(&fep->lock, flags);
netif_start_queue(dev);
if (ok_to_print)
printk(KERN_INFO "%s: link up, %dMbps, %s-duplex\n",
dev->name, speed, duplex ? "full" : "half");
}
}
/**********************************************************************************/
int fs_mii_read(struct net_device *dev, int phy_id, int location)
{
struct fs_enet_private *fep = netdev_priv(dev);
struct fs_enet_mii_bus *bus = fep->mii_bus;
unsigned long flags;
int ret;
spin_lock_irqsave(&bus->mii_lock, flags);
ret = (*bus->mii_read)(bus, phy_id, location);
spin_unlock_irqrestore(&bus->mii_lock, flags);
return ret;
}
void fs_mii_write(struct net_device *dev, int phy_id, int location, int value)
{
struct fs_enet_private *fep = netdev_priv(dev);
struct fs_enet_mii_bus *bus = fep->mii_bus;
unsigned long flags;
spin_lock_irqsave(&bus->mii_lock, flags);
(*bus->mii_write)(bus, phy_id, location, value);
spin_unlock_irqrestore(&bus->mii_lock, flags);
}
/*****************************************************************************/
/* list of all registered mii buses */
static LIST_HEAD(fs_mii_bus_list);
static struct fs_enet_mii_bus *lookup_bus(int method, int id)
{
struct list_head *ptr;
struct fs_enet_mii_bus *bus;
list_for_each(ptr, &fs_mii_bus_list) {
bus = list_entry(ptr, struct fs_enet_mii_bus, list);
if (bus->bus_info->method == method &&
bus->bus_info->id == id)
return bus;
}
return NULL;
}
static struct fs_enet_mii_bus *create_bus(const struct fs_mii_bus_info *bi)
{
struct fs_enet_mii_bus *bus;
int ret = 0;
bus = kmalloc(sizeof(*bus), GFP_KERNEL);
if (bus == NULL) {
ret = -ENOMEM;
goto err;
}
memset(bus, 0, sizeof(*bus));
spin_lock_init(&bus->mii_lock);
bus->bus_info = bi;
bus->refs = 0;
bus->usage_map = 0;
/* perform initialization */
switch (bi->method) {
case fsmii_fixed:
ret = fs_mii_fixed_init(bus);
if (ret != 0)
goto err;
break;
case fsmii_bitbang:
ret = fs_mii_bitbang_init(bus);
if (ret != 0)
goto err;
break;
#ifdef CONFIG_FS_ENET_HAS_FEC
case fsmii_fec:
ret = fs_mii_fec_init(bus);
if (ret != 0)
goto err;
break;
#endif
default:
ret = -EINVAL;
goto err;
}
list_add(&bus->list, &fs_mii_bus_list);
return bus;
err:
kfree(bus);
return ERR_PTR(ret);
}
static void destroy_bus(struct fs_enet_mii_bus *bus)
{
/* remove from bus list */
list_del(&bus->list);
/* nothing more needed */
kfree(bus);
}
int fs_mii_connect(struct net_device *dev)
{
struct fs_enet_private *fep = netdev_priv(dev);
const struct fs_platform_info *fpi = fep->fpi;
struct fs_enet_mii_bus *bus = NULL;
/* check method validity */
switch (fpi->bus_info->method) {
case fsmii_fixed:
case fsmii_bitbang:
break;
#ifdef CONFIG_FS_ENET_HAS_FEC
case fsmii_fec:
break;
#endif
default:
printk(KERN_ERR DRV_MODULE_NAME
": %s Unknown MII bus method (%d)!\n",
dev->name, fpi->bus_info->method);
return -EINVAL;
}
bus = lookup_bus(fpi->bus_info->method, fpi->bus_info->id);
/* if not found create new bus */
if (bus == NULL) {
bus = create_bus(fpi->bus_info);
if (IS_ERR(bus)) {
printk(KERN_ERR DRV_MODULE_NAME
": %s MII bus creation failure!\n", dev->name);
return PTR_ERR(bus);
}
}
bus->refs++;
fep->mii_bus = bus;
fep->mii_if.dev = dev;
fep->mii_if.phy_id_mask = 0x1f;
fep->mii_if.reg_num_mask = 0x1f;
fep->mii_if.mdio_read = fs_mii_read;
fep->mii_if.mdio_write = fs_mii_write;
fep->mii_if.force_media = fpi->bus_info->disable_aneg;
fep->mii_if.phy_id = phy_id_detect(dev);
return 0;
}
void fs_mii_disconnect(struct net_device *dev)
{
struct fs_enet_private *fep = netdev_priv(dev);
struct fs_enet_mii_bus *bus = NULL;
bus = fep->mii_bus;
fep->mii_bus = NULL;
if (--bus->refs <= 0)
destroy_bus(bus);
}
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