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linux/drivers/net/ethernet/amd/au1000_eth.c
Andrew Lunn ede5599753 ethernet: amd: au1000: Remove pointless warning 
The warning about being able to read any MDIO device, not just the
attached ethernet devices PHY applies to all MDIO drivers. So remove
it. This also removes a reference to a member in phy_device which has
moved.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-01-10 22:06:59 -05:00

1458 lines
37 KiB
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/*
*
* Alchemy Au1x00 ethernet driver
*
* Copyright 2001-2003, 2006 MontaVista Software Inc.
* Copyright 2002 TimeSys Corp.
* Added ethtool/mii-tool support,
* Copyright 2004 Matt Porter <mporter@kernel.crashing.org>
* Update: 2004 Bjoern Riemer, riemer@fokus.fraunhofer.de
* or riemer@riemer-nt.de: fixed the link beat detection with
* ioctls (SIOCGMIIPHY)
* Copyright 2006 Herbert Valerio Riedel <hvr@gnu.org>
* converted to use linux-2.6.x's PHY framework
*
* Author: MontaVista Software, Inc.
* ppopov@mvista.com or source@mvista.com
*
* ########################################################################
*
* This program is free software; you can distribute it and/or modify it
* under the terms of the GNU General Public License (Version 2) as
* published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, see <http://www.gnu.org/licenses/>.
*
* ########################################################################
*
*
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/capability.h>
#include <linux/dma-mapping.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/errno.h>
#include <linux/in.h>
#include <linux/ioport.h>
#include <linux/bitops.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/ethtool.h>
#include <linux/mii.h>
#include <linux/skbuff.h>
#include <linux/delay.h>
#include <linux/crc32.h>
#include <linux/phy.h>
#include <linux/platform_device.h>
#include <linux/cpu.h>
#include <linux/io.h>
#include <asm/mipsregs.h>
#include <asm/irq.h>
#include <asm/processor.h>
#include <au1000.h>
#include <au1xxx_eth.h>
#include <prom.h>
#include "au1000_eth.h"
#ifdef AU1000_ETH_DEBUG
static int au1000_debug = 5;
#else
static int au1000_debug = 3;
#endif
#define AU1000_DEF_MSG_ENABLE (NETIF_MSG_DRV | \
NETIF_MSG_PROBE | \
NETIF_MSG_LINK)
#define DRV_NAME "au1000_eth"
#define DRV_VERSION "1.7"
#define DRV_AUTHOR "Pete Popov <ppopov@embeddedalley.com>"
#define DRV_DESC "Au1xxx on-chip Ethernet driver"
MODULE_AUTHOR(DRV_AUTHOR);
MODULE_DESCRIPTION(DRV_DESC);
MODULE_LICENSE("GPL");
MODULE_VERSION(DRV_VERSION);
/* AU1000 MAC registers and bits */
#define MAC_CONTROL 0x0
# define MAC_RX_ENABLE (1 << 2)
# define MAC_TX_ENABLE (1 << 3)
# define MAC_DEF_CHECK (1 << 5)
# define MAC_SET_BL(X) (((X) & 0x3) << 6)
# define MAC_AUTO_PAD (1 << 8)
# define MAC_DISABLE_RETRY (1 << 10)
# define MAC_DISABLE_BCAST (1 << 11)
# define MAC_LATE_COL (1 << 12)
# define MAC_HASH_MODE (1 << 13)
# define MAC_HASH_ONLY (1 << 15)
# define MAC_PASS_ALL (1 << 16)
# define MAC_INVERSE_FILTER (1 << 17)
# define MAC_PROMISCUOUS (1 << 18)
# define MAC_PASS_ALL_MULTI (1 << 19)
# define MAC_FULL_DUPLEX (1 << 20)
# define MAC_NORMAL_MODE 0
# define MAC_INT_LOOPBACK (1 << 21)
# define MAC_EXT_LOOPBACK (1 << 22)
# define MAC_DISABLE_RX_OWN (1 << 23)
# define MAC_BIG_ENDIAN (1 << 30)
# define MAC_RX_ALL (1 << 31)
#define MAC_ADDRESS_HIGH 0x4
#define MAC_ADDRESS_LOW 0x8
#define MAC_MCAST_HIGH 0xC
#define MAC_MCAST_LOW 0x10
#define MAC_MII_CNTRL 0x14
# define MAC_MII_BUSY (1 << 0)
# define MAC_MII_READ 0
# define MAC_MII_WRITE (1 << 1)
# define MAC_SET_MII_SELECT_REG(X) (((X) & 0x1f) << 6)
# define MAC_SET_MII_SELECT_PHY(X) (((X) & 0x1f) << 11)
#define MAC_MII_DATA 0x18
#define MAC_FLOW_CNTRL 0x1C
# define MAC_FLOW_CNTRL_BUSY (1 << 0)
# define MAC_FLOW_CNTRL_ENABLE (1 << 1)
# define MAC_PASS_CONTROL (1 << 2)
# define MAC_SET_PAUSE(X) (((X) & 0xffff) << 16)
#define MAC_VLAN1_TAG 0x20
#define MAC_VLAN2_TAG 0x24
/* Ethernet Controller Enable */
# define MAC_EN_CLOCK_ENABLE (1 << 0)
# define MAC_EN_RESET0 (1 << 1)
# define MAC_EN_TOSS (0 << 2)
# define MAC_EN_CACHEABLE (1 << 3)
# define MAC_EN_RESET1 (1 << 4)
# define MAC_EN_RESET2 (1 << 5)
# define MAC_DMA_RESET (1 << 6)
/* Ethernet Controller DMA Channels */
/* offsets from MAC_TX_RING_ADDR address */
#define MAC_TX_BUFF0_STATUS 0x0
# define TX_FRAME_ABORTED (1 << 0)
# define TX_JAB_TIMEOUT (1 << 1)
# define TX_NO_CARRIER (1 << 2)
# define TX_LOSS_CARRIER (1 << 3)
# define TX_EXC_DEF (1 << 4)
# define TX_LATE_COLL_ABORT (1 << 5)
# define TX_EXC_COLL (1 << 6)
# define TX_UNDERRUN (1 << 7)
# define TX_DEFERRED (1 << 8)
# define TX_LATE_COLL (1 << 9)
# define TX_COLL_CNT_MASK (0xF << 10)
# define TX_PKT_RETRY (1 << 31)
#define MAC_TX_BUFF0_ADDR 0x4
# define TX_DMA_ENABLE (1 << 0)
# define TX_T_DONE (1 << 1)
# define TX_GET_DMA_BUFFER(X) (((X) >> 2) & 0x3)
#define MAC_TX_BUFF0_LEN 0x8
#define MAC_TX_BUFF1_STATUS 0x10
#define MAC_TX_BUFF1_ADDR 0x14
#define MAC_TX_BUFF1_LEN 0x18
#define MAC_TX_BUFF2_STATUS 0x20
#define MAC_TX_BUFF2_ADDR 0x24
#define MAC_TX_BUFF2_LEN 0x28
#define MAC_TX_BUFF3_STATUS 0x30
#define MAC_TX_BUFF3_ADDR 0x34
#define MAC_TX_BUFF3_LEN 0x38
/* offsets from MAC_RX_RING_ADDR */
#define MAC_RX_BUFF0_STATUS 0x0
# define RX_FRAME_LEN_MASK 0x3fff
# define RX_WDOG_TIMER (1 << 14)
# define RX_RUNT (1 << 15)
# define RX_OVERLEN (1 << 16)
# define RX_COLL (1 << 17)
# define RX_ETHER (1 << 18)
# define RX_MII_ERROR (1 << 19)
# define RX_DRIBBLING (1 << 20)
# define RX_CRC_ERROR (1 << 21)
# define RX_VLAN1 (1 << 22)
# define RX_VLAN2 (1 << 23)
# define RX_LEN_ERROR (1 << 24)
# define RX_CNTRL_FRAME (1 << 25)
# define RX_U_CNTRL_FRAME (1 << 26)
# define RX_MCAST_FRAME (1 << 27)
# define RX_BCAST_FRAME (1 << 28)
# define RX_FILTER_FAIL (1 << 29)
# define RX_PACKET_FILTER (1 << 30)
# define RX_MISSED_FRAME (1 << 31)
# define RX_ERROR (RX_WDOG_TIMER | RX_RUNT | RX_OVERLEN | \
RX_COLL | RX_MII_ERROR | RX_CRC_ERROR | \
RX_LEN_ERROR | RX_U_CNTRL_FRAME | RX_MISSED_FRAME)
#define MAC_RX_BUFF0_ADDR 0x4
# define RX_DMA_ENABLE (1 << 0)
# define RX_T_DONE (1 << 1)
# define RX_GET_DMA_BUFFER(X) (((X) >> 2) & 0x3)
# define RX_SET_BUFF_ADDR(X) ((X) & 0xffffffc0)
#define MAC_RX_BUFF1_STATUS 0x10
#define MAC_RX_BUFF1_ADDR 0x14
#define MAC_RX_BUFF2_STATUS 0x20
#define MAC_RX_BUFF2_ADDR 0x24
#define MAC_RX_BUFF3_STATUS 0x30
#define MAC_RX_BUFF3_ADDR 0x34
/*
* Theory of operation
*
* The Au1000 MACs use a simple rx and tx descriptor ring scheme.
* There are four receive and four transmit descriptors. These
* descriptors are not in memory; rather, they are just a set of
* hardware registers.
*
* Since the Au1000 has a coherent data cache, the receive and
* transmit buffers are allocated from the KSEG0 segment. The
* hardware registers, however, are still mapped at KSEG1 to
* make sure there's no out-of-order writes, and that all writes
* complete immediately.
*/
/*
* board-specific configurations
*
* PHY detection algorithm
*
* If phy_static_config is undefined, the PHY setup is
* autodetected:
*
* mii_probe() first searches the current MAC's MII bus for a PHY,
* selecting the first (or last, if phy_search_highest_addr is
* defined) PHY address not already claimed by another netdev.
*
* If nothing was found that way when searching for the 2nd ethernet
* controller's PHY and phy1_search_mac0 is defined, then
* the first MII bus is searched as well for an unclaimed PHY; this is
* needed in case of a dual-PHY accessible only through the MAC0's MII
* bus.
*
* Finally, if no PHY is found, then the corresponding ethernet
* controller is not registered to the network subsystem.
*/
/* autodetection defaults: phy1_search_mac0 */
/* static PHY setup
*
* most boards PHY setup should be detectable properly with the
* autodetection algorithm in mii_probe(), but in some cases (e.g. if
* you have a switch attached, or want to use the PHY's interrupt
* notification capabilities) you can provide a static PHY
* configuration here
*
* IRQs may only be set, if a PHY address was configured
* If a PHY address is given, also a bus id is required to be set
*
* ps: make sure the used irqs are configured properly in the board
* specific irq-map
*/
static void au1000_enable_mac(struct net_device *dev, int force_reset)
{
unsigned long flags;
struct au1000_private *aup = netdev_priv(dev);
spin_lock_irqsave(&aup->lock, flags);
if (force_reset || (!aup->mac_enabled)) {
writel(MAC_EN_CLOCK_ENABLE, aup->enable);
wmb(); /* drain writebuffer */
mdelay(2);
writel((MAC_EN_RESET0 | MAC_EN_RESET1 | MAC_EN_RESET2
| MAC_EN_CLOCK_ENABLE), aup->enable);
wmb(); /* drain writebuffer */
mdelay(2);
aup->mac_enabled = 1;
}
spin_unlock_irqrestore(&aup->lock, flags);
}
/*
* MII operations
*/
static int au1000_mdio_read(struct net_device *dev, int phy_addr, int reg)
{
struct au1000_private *aup = netdev_priv(dev);
u32 *const mii_control_reg = &aup->mac->mii_control;
u32 *const mii_data_reg = &aup->mac->mii_data;
u32 timedout = 20;
u32 mii_control;
while (readl(mii_control_reg) & MAC_MII_BUSY) {
mdelay(1);
if (--timedout == 0) {
netdev_err(dev, "read_MII busy timeout!!\n");
return -1;
}
}
mii_control = MAC_SET_MII_SELECT_REG(reg) |
MAC_SET_MII_SELECT_PHY(phy_addr) | MAC_MII_READ;
writel(mii_control, mii_control_reg);
timedout = 20;
while (readl(mii_control_reg) & MAC_MII_BUSY) {
mdelay(1);
if (--timedout == 0) {
netdev_err(dev, "mdio_read busy timeout!!\n");
return -1;
}
}
return readl(mii_data_reg);
}
static void au1000_mdio_write(struct net_device *dev, int phy_addr,
int reg, u16 value)
{
struct au1000_private *aup = netdev_priv(dev);
u32 *const mii_control_reg = &aup->mac->mii_control;
u32 *const mii_data_reg = &aup->mac->mii_data;
u32 timedout = 20;
u32 mii_control;
while (readl(mii_control_reg) & MAC_MII_BUSY) {
mdelay(1);
if (--timedout == 0) {
netdev_err(dev, "mdio_write busy timeout!!\n");
return;
}
}
mii_control = MAC_SET_MII_SELECT_REG(reg) |
MAC_SET_MII_SELECT_PHY(phy_addr) | MAC_MII_WRITE;
writel(value, mii_data_reg);
writel(mii_control, mii_control_reg);
}
static int au1000_mdiobus_read(struct mii_bus *bus, int phy_addr, int regnum)
{
struct net_device *const dev = bus->priv;
/* make sure the MAC associated with this
* mii_bus is enabled
*/
au1000_enable_mac(dev, 0);
return au1000_mdio_read(dev, phy_addr, regnum);
}
static int au1000_mdiobus_write(struct mii_bus *bus, int phy_addr, int regnum,
u16 value)
{
struct net_device *const dev = bus->priv;
/* make sure the MAC associated with this
* mii_bus is enabled
*/
au1000_enable_mac(dev, 0);
au1000_mdio_write(dev, phy_addr, regnum, value);
return 0;
}
static int au1000_mdiobus_reset(struct mii_bus *bus)
{
struct net_device *const dev = bus->priv;
/* make sure the MAC associated with this
* mii_bus is enabled
*/
au1000_enable_mac(dev, 0);
return 0;
}
static void au1000_hard_stop(struct net_device *dev)
{
struct au1000_private *aup = netdev_priv(dev);
u32 reg;
netif_dbg(aup, drv, dev, "hard stop\n");
reg = readl(&aup->mac->control);
reg &= ~(MAC_RX_ENABLE | MAC_TX_ENABLE);
writel(reg, &aup->mac->control);
wmb(); /* drain writebuffer */
mdelay(10);
}
static void au1000_enable_rx_tx(struct net_device *dev)
{
struct au1000_private *aup = netdev_priv(dev);
u32 reg;
netif_dbg(aup, hw, dev, "enable_rx_tx\n");
reg = readl(&aup->mac->control);
reg |= (MAC_RX_ENABLE | MAC_TX_ENABLE);
writel(reg, &aup->mac->control);
wmb(); /* drain writebuffer */
mdelay(10);
}
static void
au1000_adjust_link(struct net_device *dev)
{
struct au1000_private *aup = netdev_priv(dev);
struct phy_device *phydev = aup->phy_dev;
unsigned long flags;
u32 reg;
int status_change = 0;
BUG_ON(!aup->phy_dev);
spin_lock_irqsave(&aup->lock, flags);
if (phydev->link && (aup->old_speed != phydev->speed)) {
/* speed changed */
switch (phydev->speed) {
case SPEED_10:
case SPEED_100:
break;
default:
netdev_warn(dev, "Speed (%d) is not 10/100 ???\n",
phydev->speed);
break;
}
aup->old_speed = phydev->speed;
status_change = 1;
}
if (phydev->link && (aup->old_duplex != phydev->duplex)) {
/* duplex mode changed */
/* switching duplex mode requires to disable rx and tx! */
au1000_hard_stop(dev);
reg = readl(&aup->mac->control);
if (DUPLEX_FULL == phydev->duplex) {
reg |= MAC_FULL_DUPLEX;
reg &= ~MAC_DISABLE_RX_OWN;
} else {
reg &= ~MAC_FULL_DUPLEX;
reg |= MAC_DISABLE_RX_OWN;
}
writel(reg, &aup->mac->control);
wmb(); /* drain writebuffer */
mdelay(1);
au1000_enable_rx_tx(dev);
aup->old_duplex = phydev->duplex;
status_change = 1;
}
if (phydev->link != aup->old_link) {
/* link state changed */
if (!phydev->link) {
/* link went down */
aup->old_speed = 0;
aup->old_duplex = -1;
}
aup->old_link = phydev->link;
status_change = 1;
}
spin_unlock_irqrestore(&aup->lock, flags);
if (status_change) {
if (phydev->link)
netdev_info(dev, "link up (%d/%s)\n",
phydev->speed,
DUPLEX_FULL == phydev->duplex ? "Full" : "Half");
else
netdev_info(dev, "link down\n");
}
}
static int au1000_mii_probe(struct net_device *dev)
{
struct au1000_private *const aup = netdev_priv(dev);
struct phy_device *phydev = NULL;
int phy_addr;
if (aup->phy_static_config) {
BUG_ON(aup->mac_id < 0 || aup->mac_id > 1);
if (aup->phy_addr)
phydev = mdiobus_get_phy(aup->mii_bus, aup->phy_addr);
else
netdev_info(dev, "using PHY-less setup\n");
return 0;
}
/* find the first (lowest address) PHY
* on the current MAC's MII bus
*/
for (phy_addr = 0; phy_addr < PHY_MAX_ADDR; phy_addr++)
if (mdiobus_get_phy(aup->mii_bus, aup->phy_addr)) {
phydev = mdiobus_get_phy(aup->mii_bus, aup->phy_addr);
if (!aup->phy_search_highest_addr)
/* break out with first one found */
break;
}
if (aup->phy1_search_mac0) {
/* try harder to find a PHY */
if (!phydev && (aup->mac_id == 1)) {
/* no PHY found, maybe we have a dual PHY? */
dev_info(&dev->dev, ": no PHY found on MAC1, "
"let's see if it's attached to MAC0...\n");
/* find the first (lowest address) non-attached
* PHY on the MAC0 MII bus
*/
for (phy_addr = 0; phy_addr < PHY_MAX_ADDR; phy_addr++) {
struct phy_device *const tmp_phydev =
mdiobus_get_phy(aup->mii_bus,
phy_addr);
if (aup->mac_id == 1)
break;
/* no PHY here... */
if (!tmp_phydev)
continue;
/* already claimed by MAC0 */
if (tmp_phydev->attached_dev)
continue;
phydev = tmp_phydev;
break; /* found it */
}
}
}
if (!phydev) {
netdev_err(dev, "no PHY found\n");
return -1;
}
/* now we are supposed to have a proper phydev, to attach to... */
BUG_ON(phydev->attached_dev);
phydev = phy_connect(dev, phydev_name(phydev),
&au1000_adjust_link, PHY_INTERFACE_MODE_MII);
if (IS_ERR(phydev)) {
netdev_err(dev, "Could not attach to PHY\n");
return PTR_ERR(phydev);
}
/* mask with MAC supported features */
phydev->supported &= (SUPPORTED_10baseT_Half
| SUPPORTED_10baseT_Full
| SUPPORTED_100baseT_Half
| SUPPORTED_100baseT_Full
| SUPPORTED_Autoneg
/* | SUPPORTED_Pause | SUPPORTED_Asym_Pause */
| SUPPORTED_MII
| SUPPORTED_TP);
phydev->advertising = phydev->supported;
aup->old_link = 0;
aup->old_speed = 0;
aup->old_duplex = -1;
aup->phy_dev = phydev;
phy_attached_info(phydev);
return 0;
}
/*
* Buffer allocation/deallocation routines. The buffer descriptor returned
* has the virtual and dma address of a buffer suitable for
* both, receive and transmit operations.
*/
static struct db_dest *au1000_GetFreeDB(struct au1000_private *aup)
{
struct db_dest *pDB;
pDB = aup->pDBfree;
if (pDB)
aup->pDBfree = pDB->pnext;
return pDB;
}
void au1000_ReleaseDB(struct au1000_private *aup, struct db_dest *pDB)
{
struct db_dest *pDBfree = aup->pDBfree;
if (pDBfree)
pDBfree->pnext = pDB;
aup->pDBfree = pDB;
}
static void au1000_reset_mac_unlocked(struct net_device *dev)
{
struct au1000_private *const aup = netdev_priv(dev);
int i;
au1000_hard_stop(dev);
writel(MAC_EN_CLOCK_ENABLE, aup->enable);
wmb(); /* drain writebuffer */
mdelay(2);
writel(0, aup->enable);
wmb(); /* drain writebuffer */
mdelay(2);
aup->tx_full = 0;
for (i = 0; i < NUM_RX_DMA; i++) {
/* reset control bits */
aup->rx_dma_ring[i]->buff_stat &= ~0xf;
}
for (i = 0; i < NUM_TX_DMA; i++) {
/* reset control bits */
aup->tx_dma_ring[i]->buff_stat &= ~0xf;
}
aup->mac_enabled = 0;
}
static void au1000_reset_mac(struct net_device *dev)
{
struct au1000_private *const aup = netdev_priv(dev);
unsigned long flags;
netif_dbg(aup, hw, dev, "reset mac, aup %x\n",
(unsigned)aup);
spin_lock_irqsave(&aup->lock, flags);
au1000_reset_mac_unlocked(dev);
spin_unlock_irqrestore(&aup->lock, flags);
}
/*
* Setup the receive and transmit "rings". These pointers are the addresses
* of the rx and tx MAC DMA registers so they are fixed by the hardware --
* these are not descriptors sitting in memory.
*/
static void
au1000_setup_hw_rings(struct au1000_private *aup, void __iomem *tx_base)
{
int i;
for (i = 0; i < NUM_RX_DMA; i++) {
aup->rx_dma_ring[i] = (struct rx_dma *)
(tx_base + 0x100 + sizeof(struct rx_dma) * i);
}
for (i = 0; i < NUM_TX_DMA; i++) {
aup->tx_dma_ring[i] = (struct tx_dma *)
(tx_base + sizeof(struct tx_dma) * i);
}
}
/*
* ethtool operations
*/
static int au1000_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
{
struct au1000_private *aup = netdev_priv(dev);
if (aup->phy_dev)
return phy_ethtool_gset(aup->phy_dev, cmd);
return -EINVAL;
}
static int au1000_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
{
struct au1000_private *aup = netdev_priv(dev);
if (!capable(CAP_NET_ADMIN))
return -EPERM;
if (aup->phy_dev)
return phy_ethtool_sset(aup->phy_dev, cmd);
return -EINVAL;
}
static void
au1000_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
{
struct au1000_private *aup = netdev_priv(dev);
strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
strlcpy(info->version, DRV_VERSION, sizeof(info->version));
snprintf(info->bus_info, sizeof(info->bus_info), "%s %d", DRV_NAME,
aup->mac_id);
}
static void au1000_set_msglevel(struct net_device *dev, u32 value)
{
struct au1000_private *aup = netdev_priv(dev);
aup->msg_enable = value;
}
static u32 au1000_get_msglevel(struct net_device *dev)
{
struct au1000_private *aup = netdev_priv(dev);
return aup->msg_enable;
}
static const struct ethtool_ops au1000_ethtool_ops = {
.get_settings = au1000_get_settings,
.set_settings = au1000_set_settings,
.get_drvinfo = au1000_get_drvinfo,
.get_link = ethtool_op_get_link,
.get_msglevel = au1000_get_msglevel,
.set_msglevel = au1000_set_msglevel,
};
/*
* Initialize the interface.
*
* When the device powers up, the clocks are disabled and the
* mac is in reset state. When the interface is closed, we
* do the same -- reset the device and disable the clocks to
* conserve power. Thus, whenever au1000_init() is called,
* the device should already be in reset state.
*/
static int au1000_init(struct net_device *dev)
{
struct au1000_private *aup = netdev_priv(dev);
unsigned long flags;
int i;
u32 control;
netif_dbg(aup, hw, dev, "au1000_init\n");
/* bring the device out of reset */
au1000_enable_mac(dev, 1);
spin_lock_irqsave(&aup->lock, flags);
writel(0, &aup->mac->control);
aup->tx_head = (aup->tx_dma_ring[0]->buff_stat & 0xC) >> 2;
aup->tx_tail = aup->tx_head;
aup->rx_head = (aup->rx_dma_ring[0]->buff_stat & 0xC) >> 2;
writel(dev->dev_addr[5]<<8 | dev->dev_addr[4],
&aup->mac->mac_addr_high);
writel(dev->dev_addr[3]<<24 | dev->dev_addr[2]<<16 |
dev->dev_addr[1]<<8 | dev->dev_addr[0],
&aup->mac->mac_addr_low);
for (i = 0; i < NUM_RX_DMA; i++)
aup->rx_dma_ring[i]->buff_stat |= RX_DMA_ENABLE;
wmb(); /* drain writebuffer */
control = MAC_RX_ENABLE | MAC_TX_ENABLE;
#ifndef CONFIG_CPU_LITTLE_ENDIAN
control |= MAC_BIG_ENDIAN;
#endif
if (aup->phy_dev) {
if (aup->phy_dev->link && (DUPLEX_FULL == aup->phy_dev->duplex))
control |= MAC_FULL_DUPLEX;
else
control |= MAC_DISABLE_RX_OWN;
} else { /* PHY-less op, assume full-duplex */
control |= MAC_FULL_DUPLEX;
}
writel(control, &aup->mac->control);
writel(0x8100, &aup->mac->vlan1_tag); /* activate vlan support */
wmb(); /* drain writebuffer */
spin_unlock_irqrestore(&aup->lock, flags);
return 0;
}
static inline void au1000_update_rx_stats(struct net_device *dev, u32 status)
{
struct net_device_stats *ps = &dev->stats;
ps->rx_packets++;
if (status & RX_MCAST_FRAME)
ps->multicast++;
if (status & RX_ERROR) {
ps->rx_errors++;
if (status & RX_MISSED_FRAME)
ps->rx_missed_errors++;
if (status & (RX_OVERLEN | RX_RUNT | RX_LEN_ERROR))
ps->rx_length_errors++;
if (status & RX_CRC_ERROR)
ps->rx_crc_errors++;
if (status & RX_COLL)
ps->collisions++;
} else
ps->rx_bytes += status & RX_FRAME_LEN_MASK;
}
/*
* Au1000 receive routine.
*/
static int au1000_rx(struct net_device *dev)
{
struct au1000_private *aup = netdev_priv(dev);
struct sk_buff *skb;
struct rx_dma *prxd;
u32 buff_stat, status;
struct db_dest *pDB;
u32 frmlen;
netif_dbg(aup, rx_status, dev, "au1000_rx head %d\n", aup->rx_head);
prxd = aup->rx_dma_ring[aup->rx_head];
buff_stat = prxd->buff_stat;
while (buff_stat & RX_T_DONE) {
status = prxd->status;
pDB = aup->rx_db_inuse[aup->rx_head];
au1000_update_rx_stats(dev, status);
if (!(status & RX_ERROR)) {
/* good frame */
frmlen = (status & RX_FRAME_LEN_MASK);
frmlen -= 4; /* Remove FCS */
skb = netdev_alloc_skb(dev, frmlen + 2);
if (skb == NULL) {
dev->stats.rx_dropped++;
continue;
}
skb_reserve(skb, 2); /* 16 byte IP header align */
skb_copy_to_linear_data(skb,
(unsigned char *)pDB->vaddr, frmlen);
skb_put(skb, frmlen);
skb->protocol = eth_type_trans(skb, dev);
netif_rx(skb); /* pass the packet to upper layers */
} else {
if (au1000_debug > 4) {
pr_err("rx_error(s):");
if (status & RX_MISSED_FRAME)
pr_cont(" miss");
if (status & RX_WDOG_TIMER)
pr_cont(" wdog");
if (status & RX_RUNT)
pr_cont(" runt");
if (status & RX_OVERLEN)
pr_cont(" overlen");
if (status & RX_COLL)
pr_cont(" coll");
if (status & RX_MII_ERROR)
pr_cont(" mii error");
if (status & RX_CRC_ERROR)
pr_cont(" crc error");
if (status & RX_LEN_ERROR)
pr_cont(" len error");
if (status & RX_U_CNTRL_FRAME)
pr_cont(" u control frame");
pr_cont("\n");
}
}
prxd->buff_stat = (u32)(pDB->dma_addr | RX_DMA_ENABLE);
aup->rx_head = (aup->rx_head + 1) & (NUM_RX_DMA - 1);
wmb(); /* drain writebuffer */
/* next descriptor */
prxd = aup->rx_dma_ring[aup->rx_head];
buff_stat = prxd->buff_stat;
}
return 0;
}
static void au1000_update_tx_stats(struct net_device *dev, u32 status)
{
struct au1000_private *aup = netdev_priv(dev);
struct net_device_stats *ps = &dev->stats;
if (status & TX_FRAME_ABORTED) {
if (!aup->phy_dev || (DUPLEX_FULL == aup->phy_dev->duplex)) {
if (status & (TX_JAB_TIMEOUT | TX_UNDERRUN)) {
/* any other tx errors are only valid
* in half duplex mode
*/
ps->tx_errors++;
ps->tx_aborted_errors++;
}
} else {
ps->tx_errors++;
ps->tx_aborted_errors++;
if (status & (TX_NO_CARRIER | TX_LOSS_CARRIER))
ps->tx_carrier_errors++;
}
}
}
/*
* Called from the interrupt service routine to acknowledge
* the TX DONE bits. This is a must if the irq is setup as
* edge triggered.
*/
static void au1000_tx_ack(struct net_device *dev)
{
struct au1000_private *aup = netdev_priv(dev);
struct tx_dma *ptxd;
ptxd = aup->tx_dma_ring[aup->tx_tail];
while (ptxd->buff_stat & TX_T_DONE) {
au1000_update_tx_stats(dev, ptxd->status);
ptxd->buff_stat &= ~TX_T_DONE;
ptxd->len = 0;
wmb(); /* drain writebuffer */
aup->tx_tail = (aup->tx_tail + 1) & (NUM_TX_DMA - 1);
ptxd = aup->tx_dma_ring[aup->tx_tail];
if (aup->tx_full) {
aup->tx_full = 0;
netif_wake_queue(dev);
}
}
}
/*
* Au1000 interrupt service routine.
*/
static irqreturn_t au1000_interrupt(int irq, void *dev_id)
{
struct net_device *dev = dev_id;
/* Handle RX interrupts first to minimize chance of overrun */
au1000_rx(dev);
au1000_tx_ack(dev);
return IRQ_RETVAL(1);
}
static int au1000_open(struct net_device *dev)
{
int retval;
struct au1000_private *aup = netdev_priv(dev);
netif_dbg(aup, drv, dev, "open: dev=%p\n", dev);
retval = request_irq(dev->irq, au1000_interrupt, 0,
dev->name, dev);
if (retval) {
netdev_err(dev, "unable to get IRQ %d\n", dev->irq);
return retval;
}
retval = au1000_init(dev);
if (retval) {
netdev_err(dev, "error in au1000_init\n");
free_irq(dev->irq, dev);
return retval;
}
if (aup->phy_dev) {
/* cause the PHY state machine to schedule a link state check */
aup->phy_dev->state = PHY_CHANGELINK;
phy_start(aup->phy_dev);
}
netif_start_queue(dev);
netif_dbg(aup, drv, dev, "open: Initialization done.\n");
return 0;
}
static int au1000_close(struct net_device *dev)
{
unsigned long flags;
struct au1000_private *const aup = netdev_priv(dev);
netif_dbg(aup, drv, dev, "close: dev=%p\n", dev);
if (aup->phy_dev)
phy_stop(aup->phy_dev);
spin_lock_irqsave(&aup->lock, flags);
au1000_reset_mac_unlocked(dev);
/* stop the device */
netif_stop_queue(dev);
/* disable the interrupt */
free_irq(dev->irq, dev);
spin_unlock_irqrestore(&aup->lock, flags);
return 0;
}
/*
* Au1000 transmit routine.
*/
static netdev_tx_t au1000_tx(struct sk_buff *skb, struct net_device *dev)
{
struct au1000_private *aup = netdev_priv(dev);
struct net_device_stats *ps = &dev->stats;
struct tx_dma *ptxd;
u32 buff_stat;
struct db_dest *pDB;
int i;
netif_dbg(aup, tx_queued, dev, "tx: aup %x len=%d, data=%p, head %d\n",
(unsigned)aup, skb->len,
skb->data, aup->tx_head);
ptxd = aup->tx_dma_ring[aup->tx_head];
buff_stat = ptxd->buff_stat;
if (buff_stat & TX_DMA_ENABLE) {
/* We've wrapped around and the transmitter is still busy */
netif_stop_queue(dev);
aup->tx_full = 1;
return NETDEV_TX_BUSY;
} else if (buff_stat & TX_T_DONE) {
au1000_update_tx_stats(dev, ptxd->status);
ptxd->len = 0;
}
if (aup->tx_full) {
aup->tx_full = 0;
netif_wake_queue(dev);
}
pDB = aup->tx_db_inuse[aup->tx_head];
skb_copy_from_linear_data(skb, (void *)pDB->vaddr, skb->len);
if (skb->len < ETH_ZLEN) {
for (i = skb->len; i < ETH_ZLEN; i++)
((char *)pDB->vaddr)[i] = 0;
ptxd->len = ETH_ZLEN;
} else
ptxd->len = skb->len;
ps->tx_packets++;
ps->tx_bytes += ptxd->len;
ptxd->buff_stat = pDB->dma_addr | TX_DMA_ENABLE;
wmb(); /* drain writebuffer */
dev_kfree_skb(skb);
aup->tx_head = (aup->tx_head + 1) & (NUM_TX_DMA - 1);
return NETDEV_TX_OK;
}
/*
* The Tx ring has been full longer than the watchdog timeout
* value. The transmitter must be hung?
*/
static void au1000_tx_timeout(struct net_device *dev)
{
netdev_err(dev, "au1000_tx_timeout: dev=%p\n", dev);
au1000_reset_mac(dev);
au1000_init(dev);
dev->trans_start = jiffies; /* prevent tx timeout */
netif_wake_queue(dev);
}
static void au1000_multicast_list(struct net_device *dev)
{
struct au1000_private *aup = netdev_priv(dev);
u32 reg;
netif_dbg(aup, drv, dev, "%s: flags=%x\n", __func__, dev->flags);
reg = readl(&aup->mac->control);
if (dev->flags & IFF_PROMISC) { /* Set promiscuous. */
reg |= MAC_PROMISCUOUS;
} else if ((dev->flags & IFF_ALLMULTI) ||
netdev_mc_count(dev) > MULTICAST_FILTER_LIMIT) {
reg |= MAC_PASS_ALL_MULTI;
reg &= ~MAC_PROMISCUOUS;
netdev_info(dev, "Pass all multicast\n");
} else {
struct netdev_hw_addr *ha;
u32 mc_filter[2]; /* Multicast hash filter */
mc_filter[1] = mc_filter[0] = 0;
netdev_for_each_mc_addr(ha, dev)
set_bit(ether_crc(ETH_ALEN, ha->addr)>>26,
(long *)mc_filter);
writel(mc_filter[1], &aup->mac->multi_hash_high);
writel(mc_filter[0], &aup->mac->multi_hash_low);
reg &= ~MAC_PROMISCUOUS;
reg |= MAC_HASH_MODE;
}
writel(reg, &aup->mac->control);
}
static int au1000_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
{
struct au1000_private *aup = netdev_priv(dev);
if (!netif_running(dev))
return -EINVAL;
if (!aup->phy_dev)
return -EINVAL; /* PHY not controllable */
return phy_mii_ioctl(aup->phy_dev, rq, cmd);
}
static const struct net_device_ops au1000_netdev_ops = {
.ndo_open = au1000_open,
.ndo_stop = au1000_close,
.ndo_start_xmit = au1000_tx,
.ndo_set_rx_mode = au1000_multicast_list,
.ndo_do_ioctl = au1000_ioctl,
.ndo_tx_timeout = au1000_tx_timeout,
.ndo_set_mac_address = eth_mac_addr,
.ndo_validate_addr = eth_validate_addr,
.ndo_change_mtu = eth_change_mtu,
};
static int au1000_probe(struct platform_device *pdev)
{
struct au1000_private *aup = NULL;
struct au1000_eth_platform_data *pd;
struct net_device *dev = NULL;
struct db_dest *pDB, *pDBfree;
int irq, i, err = 0;
struct resource *base, *macen, *macdma;
base = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!base) {
dev_err(&pdev->dev, "failed to retrieve base register\n");
err = -ENODEV;
goto out;
}
macen = platform_get_resource(pdev, IORESOURCE_MEM, 1);
if (!macen) {
dev_err(&pdev->dev, "failed to retrieve MAC Enable register\n");
err = -ENODEV;
goto out;
}
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
dev_err(&pdev->dev, "failed to retrieve IRQ\n");
err = -ENODEV;
goto out;
}
macdma = platform_get_resource(pdev, IORESOURCE_MEM, 2);
if (!macdma) {
dev_err(&pdev->dev, "failed to retrieve MACDMA registers\n");
err = -ENODEV;
goto out;
}
if (!request_mem_region(base->start, resource_size(base),
pdev->name)) {
dev_err(&pdev->dev, "failed to request memory region for base registers\n");
err = -ENXIO;
goto out;
}
if (!request_mem_region(macen->start, resource_size(macen),
pdev->name)) {
dev_err(&pdev->dev, "failed to request memory region for MAC enable register\n");
err = -ENXIO;
goto err_request;
}
if (!request_mem_region(macdma->start, resource_size(macdma),
pdev->name)) {
dev_err(&pdev->dev, "failed to request MACDMA memory region\n");
err = -ENXIO;
goto err_macdma;
}
dev = alloc_etherdev(sizeof(struct au1000_private));
if (!dev) {
err = -ENOMEM;
goto err_alloc;
}
SET_NETDEV_DEV(dev, &pdev->dev);
platform_set_drvdata(pdev, dev);
aup = netdev_priv(dev);
spin_lock_init(&aup->lock);
aup->msg_enable = (au1000_debug < 4 ?
AU1000_DEF_MSG_ENABLE : au1000_debug);
/* Allocate the data buffers
* Snooping works fine with eth on all au1xxx
*/
aup->vaddr = (u32)dma_alloc_noncoherent(NULL, MAX_BUF_SIZE *
(NUM_TX_BUFFS + NUM_RX_BUFFS),
&aup->dma_addr, 0);
if (!aup->vaddr) {
dev_err(&pdev->dev, "failed to allocate data buffers\n");
err = -ENOMEM;
goto err_vaddr;
}
/* aup->mac is the base address of the MAC's registers */
aup->mac = (struct mac_reg *)
ioremap_nocache(base->start, resource_size(base));
if (!aup->mac) {
dev_err(&pdev->dev, "failed to ioremap MAC registers\n");
err = -ENXIO;
goto err_remap1;
}
/* Setup some variables for quick register address access */
aup->enable = (u32 *)ioremap_nocache(macen->start,
resource_size(macen));
if (!aup->enable) {
dev_err(&pdev->dev, "failed to ioremap MAC enable register\n");
err = -ENXIO;
goto err_remap2;
}
aup->mac_id = pdev->id;
aup->macdma = ioremap_nocache(macdma->start, resource_size(macdma));
if (!aup->macdma) {
dev_err(&pdev->dev, "failed to ioremap MACDMA registers\n");
err = -ENXIO;
goto err_remap3;
}
au1000_setup_hw_rings(aup, aup->macdma);
writel(0, aup->enable);
aup->mac_enabled = 0;
pd = dev_get_platdata(&pdev->dev);
if (!pd) {
dev_info(&pdev->dev, "no platform_data passed,"
" PHY search on MAC0\n");
aup->phy1_search_mac0 = 1;
} else {
if (is_valid_ether_addr(pd->mac)) {
memcpy(dev->dev_addr, pd->mac, ETH_ALEN);
} else {
/* Set a random MAC since no valid provided by platform_data. */
eth_hw_addr_random(dev);
}
aup->phy_static_config = pd->phy_static_config;
aup->phy_search_highest_addr = pd->phy_search_highest_addr;
aup->phy1_search_mac0 = pd->phy1_search_mac0;
aup->phy_addr = pd->phy_addr;
aup->phy_busid = pd->phy_busid;
aup->phy_irq = pd->phy_irq;
}
if (aup->phy_busid && aup->phy_busid > 0) {
dev_err(&pdev->dev, "MAC0-associated PHY attached 2nd MACs MII bus not supported yet\n");
err = -ENODEV;
goto err_mdiobus_alloc;
}
aup->mii_bus = mdiobus_alloc();
if (aup->mii_bus == NULL) {
dev_err(&pdev->dev, "failed to allocate mdiobus structure\n");
err = -ENOMEM;
goto err_mdiobus_alloc;
}
aup->mii_bus->priv = dev;
aup->mii_bus->read = au1000_mdiobus_read;
aup->mii_bus->write = au1000_mdiobus_write;
aup->mii_bus->reset = au1000_mdiobus_reset;
aup->mii_bus->name = "au1000_eth_mii";
snprintf(aup->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x",
pdev->name, aup->mac_id);
/* if known, set corresponding PHY IRQs */
if (aup->phy_static_config)
if (aup->phy_irq && aup->phy_busid == aup->mac_id)
aup->mii_bus->irq[aup->phy_addr] = aup->phy_irq;
err = mdiobus_register(aup->mii_bus);
if (err) {
dev_err(&pdev->dev, "failed to register MDIO bus\n");
goto err_mdiobus_reg;
}
err = au1000_mii_probe(dev);
if (err != 0)
goto err_out;
pDBfree = NULL;
/* setup the data buffer descriptors and attach a buffer to each one */
pDB = aup->db;
for (i = 0; i < (NUM_TX_BUFFS+NUM_RX_BUFFS); i++) {
pDB->pnext = pDBfree;
pDBfree = pDB;
pDB->vaddr = (u32 *)((unsigned)aup->vaddr + MAX_BUF_SIZE*i);
pDB->dma_addr = (dma_addr_t)virt_to_bus(pDB->vaddr);
pDB++;
}
aup->pDBfree = pDBfree;
err = -ENODEV;
for (i = 0; i < NUM_RX_DMA; i++) {
pDB = au1000_GetFreeDB(aup);
if (!pDB)
goto err_out;
aup->rx_dma_ring[i]->buff_stat = (unsigned)pDB->dma_addr;
aup->rx_db_inuse[i] = pDB;
}
err = -ENODEV;
for (i = 0; i < NUM_TX_DMA; i++) {
pDB = au1000_GetFreeDB(aup);
if (!pDB)
goto err_out;
aup->tx_dma_ring[i]->buff_stat = (unsigned)pDB->dma_addr;
aup->tx_dma_ring[i]->len = 0;
aup->tx_db_inuse[i] = pDB;
}
dev->base_addr = base->start;
dev->irq = irq;
dev->netdev_ops = &au1000_netdev_ops;
dev->ethtool_ops = &au1000_ethtool_ops;
dev->watchdog_timeo = ETH_TX_TIMEOUT;
/*
* The boot code uses the ethernet controller, so reset it to start
* fresh. au1000_init() expects that the device is in reset state.
*/
au1000_reset_mac(dev);
err = register_netdev(dev);
if (err) {
netdev_err(dev, "Cannot register net device, aborting.\n");
goto err_out;
}
netdev_info(dev, "Au1xx0 Ethernet found at 0x%lx, irq %d\n",
(unsigned long)base->start, irq);
pr_info_once("%s version %s %s\n", DRV_NAME, DRV_VERSION, DRV_AUTHOR);
return 0;
err_out:
if (aup->mii_bus != NULL)
mdiobus_unregister(aup->mii_bus);
/* here we should have a valid dev plus aup-> register addresses
* so we can reset the mac properly.
*/
au1000_reset_mac(dev);
for (i = 0; i < NUM_RX_DMA; i++) {
if (aup->rx_db_inuse[i])
au1000_ReleaseDB(aup, aup->rx_db_inuse[i]);
}
for (i = 0; i < NUM_TX_DMA; i++) {
if (aup->tx_db_inuse[i])
au1000_ReleaseDB(aup, aup->tx_db_inuse[i]);
}
err_mdiobus_reg:
mdiobus_free(aup->mii_bus);
err_mdiobus_alloc:
iounmap(aup->macdma);
err_remap3:
iounmap(aup->enable);
err_remap2:
iounmap(aup->mac);
err_remap1:
dma_free_noncoherent(NULL, MAX_BUF_SIZE * (NUM_TX_BUFFS + NUM_RX_BUFFS),
(void *)aup->vaddr, aup->dma_addr);
err_vaddr:
free_netdev(dev);
err_alloc:
release_mem_region(macdma->start, resource_size(macdma));
err_macdma:
release_mem_region(macen->start, resource_size(macen));
err_request:
release_mem_region(base->start, resource_size(base));
out:
return err;
}
static int au1000_remove(struct platform_device *pdev)
{
struct net_device *dev = platform_get_drvdata(pdev);
struct au1000_private *aup = netdev_priv(dev);
int i;
struct resource *base, *macen;
unregister_netdev(dev);
mdiobus_unregister(aup->mii_bus);
mdiobus_free(aup->mii_bus);
for (i = 0; i < NUM_RX_DMA; i++)
if (aup->rx_db_inuse[i])
au1000_ReleaseDB(aup, aup->rx_db_inuse[i]);
for (i = 0; i < NUM_TX_DMA; i++)
if (aup->tx_db_inuse[i])
au1000_ReleaseDB(aup, aup->tx_db_inuse[i]);
dma_free_noncoherent(NULL, MAX_BUF_SIZE *
(NUM_TX_BUFFS + NUM_RX_BUFFS),
(void *)aup->vaddr, aup->dma_addr);
iounmap(aup->macdma);
iounmap(aup->mac);
iounmap(aup->enable);
base = platform_get_resource(pdev, IORESOURCE_MEM, 2);
release_mem_region(base->start, resource_size(base));
base = platform_get_resource(pdev, IORESOURCE_MEM, 0);
release_mem_region(base->start, resource_size(base));
macen = platform_get_resource(pdev, IORESOURCE_MEM, 1);
release_mem_region(macen->start, resource_size(macen));
free_netdev(dev);
return 0;
}
static struct platform_driver au1000_eth_driver = {
.probe = au1000_probe,
.remove = au1000_remove,
.driver = {
.name = "au1000-eth",
},
};
module_platform_driver(au1000_eth_driver);
MODULE_ALIAS("platform:au1000-eth");
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