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dnet: Dave DNET ethernet controller driver (updated)

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Driver for Dave DNET ethernet controller found on Dave/DENX QongEVB-LITE
FPGA. Heavily based on Dave sources, I've just adopted it to current
kernel version and done some code cleanup.

Signed-off-by: Ilya Yanok <yanok@emcraft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ilya Yanok 2009-03-11 23:26:02 -07:00 committed by David S. Miller
parent ff8cf9a938
commit 4796417417
4 changed files with 1231 additions and 0 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

11
drivers/net/Kconfig
View file

@ -1040,6 +1040,17 @@ config NI65
To compile this driver as a module, choose M here. The module
will be called ni65.
config DNET
tristate "Dave ethernet support (DNET)"
depends on NET_ETHERNET
select PHYLIB
help
The Dave ethernet interface (DNET) is found on Qong Board FPGA.
Say Y to include support for the DNET chip.
To compile this driver as a module, choose M here: the module
will be called dnet.
source "drivers/net/tulip/Kconfig"
config AT1700

1
drivers/net/Makefile
View file

@ -231,6 +231,7 @@ obj-$(CONFIG_ENC28J60) += enc28j60.o
obj-$(CONFIG_XTENSA_XT2000_SONIC) += xtsonic.o
obj-$(CONFIG_DNET) += dnet.o
obj-$(CONFIG_MACB) += macb.o
obj-$(CONFIG_ARM) += arm/

994
drivers/net/dnet.c Normal file
View file

@ -0,0 +1,994 @@
/*
* Dave DNET Ethernet Controller driver
*
* Copyright (C) 2008 Dave S.r.l. <www.dave.eu>
* Copyright (C) 2009 Ilya Yanok, Emcraft Systems Ltd, <yanok@emcraft.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/version.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/dma-mapping.h>
#include <linux/platform_device.h>
#include <linux/phy.h>
#include <linux/platform_device.h>
#include "dnet.h"
#undef DEBUG
/* function for reading internal MAC register */
u16 dnet_readw_mac(struct dnet *bp, u16 reg)
{
u16 data_read;
/* issue a read */
dnet_writel(bp, reg, MACREG_ADDR);
/* since a read/write op to the MAC is very slow,
* we must wait before reading the data */
ndelay(500);
/* read data read from the MAC register */
data_read = dnet_readl(bp, MACREG_DATA);
/* all done */
return data_read;
}
/* function for writing internal MAC register */
void dnet_writew_mac(struct dnet *bp, u16 reg, u16 val)
{
/* load data to write */
dnet_writel(bp, val, MACREG_DATA);
/* issue a write */
dnet_writel(bp, reg | DNET_INTERNAL_WRITE, MACREG_ADDR);
/* since a read/write op to the MAC is very slow,
* we must wait before exiting */
ndelay(500);
}
static void __dnet_set_hwaddr(struct dnet *bp)
{
u16 tmp;
tmp = cpu_to_be16(*((u16 *) bp->dev->dev_addr));
dnet_writew_mac(bp, DNET_INTERNAL_MAC_ADDR_0_REG, tmp);
tmp = cpu_to_be16(*((u16 *) (bp->dev->dev_addr + 2)));
dnet_writew_mac(bp, DNET_INTERNAL_MAC_ADDR_1_REG, tmp);
tmp = cpu_to_be16(*((u16 *) (bp->dev->dev_addr + 4)));
dnet_writew_mac(bp, DNET_INTERNAL_MAC_ADDR_2_REG, tmp);
}
static void __devinit dnet_get_hwaddr(struct dnet *bp)
{
u16 tmp;
u8 addr[6];
/*
* from MAC docs:
* "Note that the MAC address is stored in the registers in Hexadecimal
* form. For example, to set the MAC Address to: AC-DE-48-00-00-80
* would require writing 0xAC (octet 0) to address 0x0B (high byte of
* Mac_addr[15:0]), 0xDE (octet 1) to address 0x0A (Low byte of
* Mac_addr[15:0]), 0x48 (octet 2) to address 0x0D (high byte of
* Mac_addr[15:0]), 0x00 (octet 3) to address 0x0C (Low byte of
* Mac_addr[15:0]), 0x00 (octet 4) to address 0x0F (high byte of
* Mac_addr[15:0]), and 0x80 (octet 5) to address * 0x0E (Low byte of
* Mac_addr[15:0]).
*/
tmp = dnet_readw_mac(bp, DNET_INTERNAL_MAC_ADDR_0_REG);
*((u16 *) addr) = be16_to_cpu(tmp);
tmp = dnet_readw_mac(bp, DNET_INTERNAL_MAC_ADDR_1_REG);
*((u16 *) (addr + 2)) = be16_to_cpu(tmp);
tmp = dnet_readw_mac(bp, DNET_INTERNAL_MAC_ADDR_2_REG);
*((u16 *) (addr + 4)) = be16_to_cpu(tmp);
if (is_valid_ether_addr(addr))
memcpy(bp->dev->dev_addr, addr, sizeof(addr));
}
static int dnet_mdio_read(struct mii_bus *bus, int mii_id, int regnum)
{
struct dnet *bp = bus->priv;
u16 value;
while (!(dnet_readw_mac(bp, DNET_INTERNAL_GMII_MNG_CTL_REG)
& DNET_INTERNAL_GMII_MNG_CMD_FIN))
cpu_relax();
/* only 5 bits allowed for phy-addr and reg_offset */
mii_id &= 0x1f;
regnum &= 0x1f;
/* prepare reg_value for a read */
value = (mii_id << 8);
value |= regnum;
/* write control word */
dnet_writew_mac(bp, DNET_INTERNAL_GMII_MNG_CTL_REG, value);
/* wait for end of transfer */
while (!(dnet_readw_mac(bp, DNET_INTERNAL_GMII_MNG_CTL_REG)
& DNET_INTERNAL_GMII_MNG_CMD_FIN))
cpu_relax();
value = dnet_readw_mac(bp, DNET_INTERNAL_GMII_MNG_DAT_REG);
pr_debug("mdio_read %02x:%02x <- %04x\n", mii_id, regnum, value);
return value;
}
static int dnet_mdio_write(struct mii_bus *bus, int mii_id, int regnum,
u16 value)
{
struct dnet *bp = bus->priv;
u16 tmp;
pr_debug("mdio_write %02x:%02x <- %04x\n", mii_id, regnum, value);
while (!(dnet_readw_mac(bp, DNET_INTERNAL_GMII_MNG_CTL_REG)
& DNET_INTERNAL_GMII_MNG_CMD_FIN))
cpu_relax();
/* prepare for a write operation */
tmp = (1 << 13);
/* only 5 bits allowed for phy-addr and reg_offset */
mii_id &= 0x1f;
regnum &= 0x1f;
/* only 16 bits on data */
value &= 0xffff;
/* prepare reg_value for a write */
tmp |= (mii_id << 8);
tmp |= regnum;
/* write data to write first */
dnet_writew_mac(bp, DNET_INTERNAL_GMII_MNG_DAT_REG, value);
/* write control word */
dnet_writew_mac(bp, DNET_INTERNAL_GMII_MNG_CTL_REG, tmp);
while (!(dnet_readw_mac(bp, DNET_INTERNAL_GMII_MNG_CTL_REG)
& DNET_INTERNAL_GMII_MNG_CMD_FIN))
cpu_relax();
return 0;
}
static int dnet_mdio_reset(struct mii_bus *bus)
{
return 0;
}
static void dnet_handle_link_change(struct net_device *dev)
{
struct dnet *bp = netdev_priv(dev);
struct phy_device *phydev = bp->phy_dev;
unsigned long flags;
u32 mode_reg, ctl_reg;
int status_change = 0;
spin_lock_irqsave(&bp->lock, flags);
mode_reg = dnet_readw_mac(bp, DNET_INTERNAL_MODE_REG);
ctl_reg = dnet_readw_mac(bp, DNET_INTERNAL_RXTX_CONTROL_REG);
if (phydev->link) {
if (bp->duplex != phydev->duplex) {
if (phydev->duplex)
ctl_reg &=
~(DNET_INTERNAL_RXTX_CONTROL_ENABLEHALFDUP);
else
ctl_reg |=
DNET_INTERNAL_RXTX_CONTROL_ENABLEHALFDUP;
bp->duplex = phydev->duplex;
status_change = 1;
}
if (bp->speed != phydev->speed) {
status_change = 1;
switch (phydev->speed) {
case 1000:
mode_reg |= DNET_INTERNAL_MODE_GBITEN;
break;
case 100:
case 10:
mode_reg &= ~DNET_INTERNAL_MODE_GBITEN;
break;
default:
printk(KERN_WARNING
"%s: Ack! Speed (%d) is not "
"10/100/1000!\n", dev->name,
phydev->speed);
break;
}
bp->speed = phydev->speed;
}
}
if (phydev->link != bp->link) {
if (phydev->link) {
mode_reg |=
(DNET_INTERNAL_MODE_RXEN | DNET_INTERNAL_MODE_TXEN);
} else {
mode_reg &=
~(DNET_INTERNAL_MODE_RXEN |
DNET_INTERNAL_MODE_TXEN);
bp->speed = 0;
bp->duplex = -1;
}
bp->link = phydev->link;
status_change = 1;
}
if (status_change) {
dnet_writew_mac(bp, DNET_INTERNAL_RXTX_CONTROL_REG, ctl_reg);
dnet_writew_mac(bp, DNET_INTERNAL_MODE_REG, mode_reg);
}
spin_unlock_irqrestore(&bp->lock, flags);
if (status_change) {
if (phydev->link)
printk(KERN_INFO "%s: link up (%d/%s)\n",
dev->name, phydev->speed,
DUPLEX_FULL == phydev->duplex ? "Full" : "Half");
else
printk(KERN_INFO "%s: link down\n", dev->name);
}
}
static int dnet_mii_probe(struct net_device *dev)
{
struct dnet *bp = netdev_priv(dev);
struct phy_device *phydev = NULL;
int phy_addr;
/* find the first phy */
for (phy_addr = 0; phy_addr < PHY_MAX_ADDR; phy_addr++) {
if (bp->mii_bus->phy_map[phy_addr]) {
phydev = bp->mii_bus->phy_map[phy_addr];
break;
}
}
if (!phydev) {
printk(KERN_ERR "%s: no PHY found\n", dev->name);
return -ENODEV;
}
/* TODO : add pin_irq */
/* attach the mac to the phy */
if (bp->capabilities & DNET_HAS_RMII) {
phydev = phy_connect(dev, phydev->dev.bus_id,
&dnet_handle_link_change, 0,
PHY_INTERFACE_MODE_RMII);
} else {
phydev = phy_connect(dev, phydev->dev.bus_id,
&dnet_handle_link_change, 0,
PHY_INTERFACE_MODE_MII);
}
if (IS_ERR(phydev)) {
printk(KERN_ERR "%s: Could not attach to PHY\n", dev->name);
return PTR_ERR(phydev);
}
/* mask with MAC supported features */
if (bp->capabilities & DNET_HAS_GIGABIT)
phydev->supported &= PHY_GBIT_FEATURES;
else
phydev->supported &= PHY_BASIC_FEATURES;
phydev->supported |= SUPPORTED_Asym_Pause | SUPPORTED_Pause;
phydev->advertising = phydev->supported;
bp->link = 0;
bp->speed = 0;
bp->duplex = -1;
bp->phy_dev = phydev;
return 0;
}
static int dnet_mii_init(struct dnet *bp)
{
int err, i;
bp->mii_bus = mdiobus_alloc();
if (bp->mii_bus == NULL)
return -ENOMEM;
bp->mii_bus->name = "dnet_mii_bus";
bp->mii_bus->read = &dnet_mdio_read;
bp->mii_bus->write = &dnet_mdio_write;
bp->mii_bus->reset = &dnet_mdio_reset;
snprintf(bp->mii_bus->id, MII_BUS_ID_SIZE, "%x", 0);
bp->mii_bus->priv = bp;
bp->mii_bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
if (!bp->mii_bus->irq) {
err = -ENOMEM;
goto err_out;
}
for (i = 0; i < PHY_MAX_ADDR; i++)
bp->mii_bus->irq[i] = PHY_POLL;
platform_set_drvdata(bp->dev, bp->mii_bus);
if (mdiobus_register(bp->mii_bus)) {
err = -ENXIO;
goto err_out_free_mdio_irq;
}
if (dnet_mii_probe(bp->dev) != 0) {
err = -ENXIO;
goto err_out_unregister_bus;
}
return 0;
err_out_unregister_bus:
mdiobus_unregister(bp->mii_bus);
err_out_free_mdio_irq:
kfree(bp->mii_bus->irq);
err_out:
mdiobus_free(bp->mii_bus);
return err;
}
/* For Neptune board: LINK1000 as Link LED and TX as activity LED */
int dnet_phy_marvell_fixup(struct phy_device *phydev)
{
return phy_write(phydev, 0x18, 0x4148);
}
static void dnet_update_stats(struct dnet *bp)
{
u32 __iomem *reg = bp->regs + DNET_RX_PKT_IGNR_CNT;
u32 *p = &bp->hw_stats.rx_pkt_ignr;
u32 *end = &bp->hw_stats.rx_byte + 1;
WARN_ON((unsigned long)(end - p - 1) !=
(DNET_RX_BYTE_CNT - DNET_RX_PKT_IGNR_CNT) / 4);
for (; p < end; p++, reg++)
*p += readl(reg);
reg = bp->regs + DNET_TX_UNICAST_CNT;
p = &bp->hw_stats.tx_unicast;
end = &bp->hw_stats.tx_byte + 1;
WARN_ON((unsigned long)(end - p - 1) !=
(DNET_TX_BYTE_CNT - DNET_TX_UNICAST_CNT) / 4);
for (; p < end; p++, reg++)
*p += readl(reg);
}
static int dnet_poll(struct napi_struct *napi, int budget)
{
struct dnet *bp = container_of(napi, struct dnet, napi);
struct net_device *dev = bp->dev;
int npackets = 0;
unsigned int pkt_len;
struct sk_buff *skb;
unsigned int *data_ptr;
u32 int_enable;
u32 cmd_word;
int i;
while (npackets < budget) {
/*
* break out of while loop if there are no more
* packets waiting
*/
if (!(dnet_readl(bp, RX_FIFO_WCNT) >> 16)) {
netif_rx_complete(napi);
int_enable = dnet_readl(bp, INTR_ENB);
int_enable |= DNET_INTR_SRC_RX_CMDFIFOAF;
dnet_writel(bp, int_enable, INTR_ENB);
return 0;
}
cmd_word = dnet_readl(bp, RX_LEN_FIFO);
pkt_len = cmd_word & 0xFFFF;
if (cmd_word & 0xDF180000)
printk(KERN_ERR "%s packet receive error %x\n",
__func__, cmd_word);
skb = dev_alloc_skb(pkt_len + 5);
if (skb != NULL) {
/* Align IP on 16 byte boundaries */
skb_reserve(skb, 2);
/*
* 'skb_put()' points to the start of sk_buff
* data area.
*/
data_ptr = (unsigned int *)skb_put(skb, pkt_len);
for (i = 0; i < (pkt_len + 3) >> 2; i++)
*data_ptr++ = dnet_readl(bp, RX_DATA_FIFO);
skb->protocol = eth_type_trans(skb, dev);
netif_receive_skb(skb);
npackets++;
} else
printk(KERN_NOTICE
"%s: No memory to allocate a sk_buff of "
"size %u.\n", dev->name, pkt_len);
}
budget -= npackets;
if (npackets < budget) {
/* We processed all packets available. Tell NAPI it can
* stop polling then re-enable rx interrupts */
netif_rx_complete(napi);
int_enable = dnet_readl(bp, INTR_ENB);
int_enable |= DNET_INTR_SRC_RX_CMDFIFOAF;
dnet_writel(bp, int_enable, INTR_ENB);
return 0;
}
/* There are still packets waiting */
return 1;
}
static irqreturn_t dnet_interrupt(int irq, void *dev_id)
{
struct net_device *dev = dev_id;
struct dnet *bp = netdev_priv(dev);
u32 int_src, int_enable, int_current;
unsigned long flags;
unsigned int handled = 0;
spin_lock_irqsave(&bp->lock, flags);
/* read and clear the DNET irq (clear on read) */
int_src = dnet_readl(bp, INTR_SRC);
int_enable = dnet_readl(bp, INTR_ENB);
int_current = int_src & int_enable;
/* restart the queue if we had stopped it for TX fifo almost full */
if (int_current & DNET_INTR_SRC_TX_FIFOAE) {
int_enable = dnet_readl(bp, INTR_ENB);
int_enable &= ~DNET_INTR_ENB_TX_FIFOAE;
dnet_writel(bp, int_enable, INTR_ENB);
netif_wake_queue(dev);
handled = 1;
}
/* RX FIFO error checking */
if (int_current &
(DNET_INTR_SRC_RX_CMDFIFOFF | DNET_INTR_SRC_RX_DATAFIFOFF)) {
printk(KERN_ERR "%s: RX fifo error %x, irq %x\n", __func__,
dnet_readl(bp, RX_STATUS), int_current);
/* we can only flush the RX FIFOs */
dnet_writel(bp, DNET_SYS_CTL_RXFIFOFLUSH, SYS_CTL);
ndelay(500);
dnet_writel(bp, 0, SYS_CTL);
handled = 1;
}
/* TX FIFO error checking */
if (int_current &
(DNET_INTR_SRC_TX_FIFOFULL | DNET_INTR_SRC_TX_DISCFRM)) {
printk(KERN_ERR "%s: TX fifo error %x, irq %x\n", __func__,
dnet_readl(bp, TX_STATUS), int_current);
/* we can only flush the TX FIFOs */
dnet_writel(bp, DNET_SYS_CTL_TXFIFOFLUSH, SYS_CTL);
ndelay(500);
dnet_writel(bp, 0, SYS_CTL);
handled = 1;
}
if (int_current & DNET_INTR_SRC_RX_CMDFIFOAF) {
if (netif_rx_schedule_prep(&bp->napi)) {
/*
* There's no point taking any more interrupts
* until we have processed the buffers
*/
/* Disable Rx interrupts and schedule NAPI poll */
int_enable = dnet_readl(bp, INTR_ENB);
int_enable &= ~DNET_INTR_SRC_RX_CMDFIFOAF;
dnet_writel(bp, int_enable, INTR_ENB);
__netif_rx_schedule(&bp->napi);
}
handled = 1;
}
if (!handled)
pr_debug("%s: irq %x remains\n", __func__, int_current);
spin_unlock_irqrestore(&bp->lock, flags);
return IRQ_RETVAL(handled);
}
#ifdef DEBUG
static inline void dnet_print_skb(struct sk_buff *skb)
{
int k;
printk(KERN_DEBUG PFX "data:");
for (k = 0; k < skb->len; k++)
printk(" %02x", (unsigned int)skb->data[k]);
printk("\n");
}
#else
#define dnet_print_skb(skb) do {} while (0)
#endif
static int dnet_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct dnet *bp = netdev_priv(dev);
u32 tx_status, irq_enable;
unsigned int len, i, tx_cmd, wrsz;
unsigned long flags;
unsigned int *bufp;
tx_status = dnet_readl(bp, TX_STATUS);
pr_debug("start_xmit: len %u head %p data %p tail %p end %p\n",
skb->len, skb->head, skb->data, skb->tail, skb->end);
dnet_print_skb(skb);
/* frame size (words) */
len = (skb->len + 3) >> 2;
spin_lock_irqsave(&bp->lock, flags);
tx_status = dnet_readl(bp, TX_STATUS);
bufp = (unsigned int *)(((u32) skb->data) & 0xFFFFFFFC);
wrsz = (u32) skb->len + 3;
wrsz += ((u32) skb->data) & 0x3;
wrsz >>= 2;
tx_cmd = ((((unsigned int)(skb->data)) & 0x03) << 16) | (u32) skb->len;
/* check if there is enough room for the current frame */
if (wrsz < (DNET_FIFO_SIZE - dnet_readl(bp, TX_FIFO_WCNT))) {
for (i = 0; i < wrsz; i++)
dnet_writel(bp, *bufp++, TX_DATA_FIFO);
/*
* inform MAC that a packet's written and ready to be
* shipped out
*/
dnet_writel(bp, tx_cmd, TX_LEN_FIFO);
}
if (dnet_readl(bp, TX_FIFO_WCNT) > DNET_FIFO_TX_DATA_AF_TH) {
netif_stop_queue(dev);
tx_status = dnet_readl(bp, INTR_SRC);
irq_enable = dnet_readl(bp, INTR_ENB);
irq_enable |= DNET_INTR_ENB_TX_FIFOAE;
dnet_writel(bp, irq_enable, INTR_ENB);
}
/* free the buffer */
dev_kfree_skb(skb);
spin_unlock_irqrestore(&bp->lock, flags);
dev->trans_start = jiffies;
return 0;
}
static void dnet_reset_hw(struct dnet *bp)
{
/* put ts_mac in IDLE state i.e. disable rx/tx */
dnet_writew_mac(bp, DNET_INTERNAL_MODE_REG, DNET_INTERNAL_MODE_FCEN);
/*
* RX FIFO almost full threshold: only cmd FIFO almost full is
* implemented for RX side
*/
dnet_writel(bp, DNET_FIFO_RX_CMD_AF_TH, RX_FIFO_TH);
/*
* TX FIFO almost empty threshold: only data FIFO almost empty
* is implemented for TX side
*/
dnet_writel(bp, DNET_FIFO_TX_DATA_AE_TH, TX_FIFO_TH);
/* flush rx/tx fifos */
dnet_writel(bp, DNET_SYS_CTL_RXFIFOFLUSH | DNET_SYS_CTL_TXFIFOFLUSH,
SYS_CTL);
msleep(1);
dnet_writel(bp, 0, SYS_CTL);
}
static void dnet_init_hw(struct dnet *bp)
{
u32 config;
dnet_reset_hw(bp);
__dnet_set_hwaddr(bp);
config = dnet_readw_mac(bp, DNET_INTERNAL_RXTX_CONTROL_REG);
if (bp->dev->flags & IFF_PROMISC)
/* Copy All Frames */
config |= DNET_INTERNAL_RXTX_CONTROL_ENPROMISC;
if (!(bp->dev->flags & IFF_BROADCAST))
/* No BroadCast */
config |= DNET_INTERNAL_RXTX_CONTROL_RXMULTICAST;
config |= DNET_INTERNAL_RXTX_CONTROL_RXPAUSE |
DNET_INTERNAL_RXTX_CONTROL_RXBROADCAST |
DNET_INTERNAL_RXTX_CONTROL_DROPCONTROL |
DNET_INTERNAL_RXTX_CONTROL_DISCFXFCS;
dnet_writew_mac(bp, DNET_INTERNAL_RXTX_CONTROL_REG, config);
/* clear irq before enabling them */
config = dnet_readl(bp, INTR_SRC);
/* enable RX/TX interrupt, recv packet ready interrupt */
dnet_writel(bp, DNET_INTR_ENB_GLOBAL_ENABLE | DNET_INTR_ENB_RX_SUMMARY |
DNET_INTR_ENB_TX_SUMMARY | DNET_INTR_ENB_RX_FIFOERR |
DNET_INTR_ENB_RX_ERROR | DNET_INTR_ENB_RX_FIFOFULL |
DNET_INTR_ENB_TX_FIFOFULL | DNET_INTR_ENB_TX_DISCFRM |
DNET_INTR_ENB_RX_PKTRDY, INTR_ENB);
}
static int dnet_open(struct net_device *dev)
{
struct dnet *bp = netdev_priv(dev);
/* if the phy is not yet register, retry later */
if (!bp->phy_dev)
return -EAGAIN;
if (!is_valid_ether_addr(dev->dev_addr))
return -EADDRNOTAVAIL;
napi_enable(&bp->napi);
dnet_init_hw(bp);
phy_start_aneg(bp->phy_dev);
/* schedule a link state check */
phy_start(bp->phy_dev);
netif_start_queue(dev);
return 0;
}
static int dnet_close(struct net_device *dev)
{
struct dnet *bp = netdev_priv(dev);
netif_stop_queue(dev);
napi_disable(&bp->napi);
if (bp->phy_dev)
phy_stop(bp->phy_dev);
dnet_reset_hw(bp);
netif_carrier_off(dev);
return 0;
}
static inline void dnet_print_pretty_hwstats(struct dnet_stats *hwstat)
{
pr_debug("%s\n", __func__);
pr_debug("----------------------------- RX statistics "
"-------------------------------\n");
pr_debug("RX_PKT_IGNR_CNT %-8x\n", hwstat->rx_pkt_ignr);
pr_debug("RX_LEN_CHK_ERR_CNT %-8x\n", hwstat->rx_len_chk_err);
pr_debug("RX_LNG_FRM_CNT %-8x\n", hwstat->rx_lng_frm);
pr_debug("RX_SHRT_FRM_CNT %-8x\n", hwstat->rx_shrt_frm);
pr_debug("RX_IPG_VIOL_CNT %-8x\n", hwstat->rx_ipg_viol);
pr_debug("RX_CRC_ERR_CNT %-8x\n", hwstat->rx_crc_err);
pr_debug("RX_OK_PKT_CNT %-8x\n", hwstat->rx_ok_pkt);
pr_debug("RX_CTL_FRM_CNT %-8x\n", hwstat->rx_ctl_frm);
pr_debug("RX_PAUSE_FRM_CNT %-8x\n", hwstat->rx_pause_frm);
pr_debug("RX_MULTICAST_CNT %-8x\n", hwstat->rx_multicast);
pr_debug("RX_BROADCAST_CNT %-8x\n", hwstat->rx_broadcast);
pr_debug("RX_VLAN_TAG_CNT %-8x\n", hwstat->rx_vlan_tag);
pr_debug("RX_PRE_SHRINK_CNT %-8x\n", hwstat->rx_pre_shrink);
pr_debug("RX_DRIB_NIB_CNT %-8x\n", hwstat->rx_drib_nib);
pr_debug("RX_UNSUP_OPCD_CNT %-8x\n", hwstat->rx_unsup_opcd);
pr_debug("RX_BYTE_CNT %-8x\n", hwstat->rx_byte);
pr_debug("----------------------------- TX statistics "
"-------------------------------\n");
pr_debug("TX_UNICAST_CNT %-8x\n", hwstat->tx_unicast);
pr_debug("TX_PAUSE_FRM_CNT %-8x\n", hwstat->tx_pause_frm);
pr_debug("TX_MULTICAST_CNT %-8x\n", hwstat->tx_multicast);
pr_debug("TX_BRDCAST_CNT %-8x\n", hwstat->tx_brdcast);
pr_debug("TX_VLAN_TAG_CNT %-8x\n", hwstat->tx_vlan_tag);
pr_debug("TX_BAD_FCS_CNT %-8x\n", hwstat->tx_bad_fcs);
pr_debug("TX_JUMBO_CNT %-8x\n", hwstat->tx_jumbo);
pr_debug("TX_BYTE_CNT %-8x\n", hwstat->tx_byte);
}
static struct net_device_stats *dnet_get_stats(struct net_device *dev)
{
struct dnet *bp = netdev_priv(dev);
struct net_device_stats *nstat = &dev->stats;
struct dnet_stats *hwstat = &bp->hw_stats;
/* read stats from hardware */
dnet_update_stats(bp);
/* Convert HW stats into netdevice stats */
nstat->rx_errors = (hwstat->rx_len_chk_err +
hwstat->rx_lng_frm + hwstat->rx_shrt_frm +
/* ignore IGP violation error
hwstat->rx_ipg_viol + */
hwstat->rx_crc_err +
hwstat->rx_pre_shrink +
hwstat->rx_drib_nib + hwstat->rx_unsup_opcd);
nstat->tx_errors = hwstat->tx_bad_fcs;
nstat->rx_length_errors = (hwstat->rx_len_chk_err +
hwstat->rx_lng_frm +
hwstat->rx_shrt_frm + hwstat->rx_pre_shrink);
nstat->rx_crc_errors = hwstat->rx_crc_err;
nstat->rx_frame_errors = hwstat->rx_pre_shrink + hwstat->rx_drib_nib;
nstat->rx_packets = hwstat->rx_ok_pkt;
nstat->tx_packets = (hwstat->tx_unicast +
hwstat->tx_multicast + hwstat->tx_brdcast);
nstat->rx_bytes = hwstat->rx_byte;
nstat->tx_bytes = hwstat->tx_byte;
nstat->multicast = hwstat->rx_multicast;
nstat->rx_missed_errors = hwstat->rx_pkt_ignr;
dnet_print_pretty_hwstats(hwstat);
return nstat;
}
static int dnet_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
{
struct dnet *bp = netdev_priv(dev);
struct phy_device *phydev = bp->phy_dev;
if (!phydev)
return -ENODEV;
return phy_ethtool_gset(phydev, cmd);
}
static int dnet_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
{
struct dnet *bp = netdev_priv(dev);
struct phy_device *phydev = bp->phy_dev;
if (!phydev)
return -ENODEV;
return phy_ethtool_sset(phydev, cmd);
}
static int dnet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
{
struct dnet *bp = netdev_priv(dev);
struct phy_device *phydev = bp->phy_dev;
if (!netif_running(dev))
return -EINVAL;
if (!phydev)
return -ENODEV;
return phy_mii_ioctl(phydev, if_mii(rq), cmd);
}
static void dnet_get_drvinfo(struct net_device *dev,
struct ethtool_drvinfo *info)
{
strcpy(info->driver, DRV_NAME);
strcpy(info->version, DRV_VERSION);
strcpy(info->bus_info, "0");
}
static const struct ethtool_ops dnet_ethtool_ops = {
.get_settings = dnet_get_settings,
.set_settings = dnet_set_settings,
.get_drvinfo = dnet_get_drvinfo,
.get_link = ethtool_op_get_link,
};
static const struct net_device_ops dnet_netdev_ops = {
.ndo_open = dnet_open,
.ndo_stop = dnet_close,
.ndo_get_stats = dnet_get_stats,
.ndo_start_xmit = dnet_start_xmit,
.ndo_do_ioctl = dnet_ioctl,
.ndo_set_mac_address = eth_mac_addr,
.ndo_validate_addr = eth_validate_addr,
.ndo_change_mtu = eth_change_mtu,
};
static int __devinit dnet_probe(struct platform_device *pdev)
{
struct resource *res;
struct net_device *dev;
struct dnet *bp;
struct phy_device *phydev;
int err = -ENXIO;
unsigned int mem_base, mem_size, irq;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(&pdev->dev, "no mmio resource defined\n");
goto err_out;
}
mem_base = res->start;
mem_size = resource_size(res);
irq = platform_get_irq(pdev, 0);
if (!request_mem_region(mem_base, mem_size, DRV_NAME)) {
dev_err(&pdev->dev, "no memory region available\n");
err = -EBUSY;
goto err_out;
}
err = -ENOMEM;
dev = alloc_etherdev(sizeof(*bp));
if (!dev) {
dev_err(&pdev->dev, "etherdev alloc failed, aborting.\n");
goto err_out;
}
/* TODO: Actually, we have some interesting features... */
dev->features |= 0;
bp = netdev_priv(dev);
bp->dev = dev;
SET_NETDEV_DEV(dev, &pdev->dev);
spin_lock_init(&bp->lock);
bp->regs = ioremap(mem_base, mem_size);
if (!bp->regs) {
dev_err(&pdev->dev, "failed to map registers, aborting.\n");
err = -ENOMEM;
goto err_out_free_dev;
}
dev->irq = irq;
err = request_irq(dev->irq, dnet_interrupt, 0, DRV_NAME, dev);
if (err) {
dev_err(&pdev->dev, "Unable to request IRQ %d (error %d)\n",
irq, err);
goto err_out_iounmap;
}
dev->netdev_ops = &dnet_netdev_ops;
netif_napi_add(dev, &bp->napi, dnet_poll, 64);
dev->ethtool_ops = &dnet_ethtool_ops;
dev->base_addr = (unsigned long)bp->regs;
bp->capabilities = dnet_readl(bp, VERCAPS) & DNET_CAPS_MASK;
dnet_get_hwaddr(bp);
if (!is_valid_ether_addr(dev->dev_addr)) {
/* choose a random ethernet address */
random_ether_addr(dev->dev_addr);
__dnet_set_hwaddr(bp);
}
err = register_netdev(dev);
if (err) {
dev_err(&pdev->dev, "Cannot register net device, aborting.\n");
goto err_out_free_irq;
}
/* register the PHY board fixup (for Marvell 88E1111) */
err = phy_register_fixup_for_uid(0x01410cc0, 0xfffffff0,
dnet_phy_marvell_fixup);
/* we can live without it, so just issue a warning */
if (err)
dev_warn(&pdev->dev, "Cannot register PHY board fixup.\n");
if (dnet_mii_init(bp) != 0)
goto err_out_unregister_netdev;
dev_info(&pdev->dev, "Dave DNET at 0x%p (0x%08x) irq %d %pM\n",
bp->regs, mem_base, dev->irq, dev->dev_addr);
dev_info(&pdev->dev, "has %smdio, %sirq, %sgigabit, %sdma \n",
(bp->capabilities & DNET_HAS_MDIO) ? "" : "no ",
(bp->capabilities & DNET_HAS_IRQ) ? "" : "no ",
(bp->capabilities & DNET_HAS_GIGABIT) ? "" : "no ",
(bp->capabilities & DNET_HAS_DMA) ? "" : "no ");
phydev = bp->phy_dev;
dev_info(&pdev->dev, "attached PHY driver [%s] "
"(mii_bus:phy_addr=%s, irq=%d)\n",
phydev->drv->name, phydev->dev.bus_id, phydev->irq);
return 0;
err_out_unregister_netdev:
unregister_netdev(dev);
err_out_free_irq:
free_irq(dev->irq, dev);
err_out_iounmap:
iounmap(bp->regs);
err_out_free_dev:
free_netdev(dev);
err_out:
return err;
}
static int __devexit dnet_remove(struct platform_device *pdev)
{
struct net_device *dev;
struct dnet *bp;
dev = platform_get_drvdata(pdev);
if (dev) {
bp = netdev_priv(dev);
if (bp->phy_dev)
phy_disconnect(bp->phy_dev);
mdiobus_unregister(bp->mii_bus);
kfree(bp->mii_bus->irq);
mdiobus_free(bp->mii_bus);
unregister_netdev(dev);
free_irq(dev->irq, dev);
iounmap(bp->regs);
free_netdev(dev);
}
return 0;
}
static struct platform_driver dnet_driver = {
.probe = dnet_probe,
.remove = __devexit_p(dnet_remove),
.driver = {
.name = "dnet",
},
};
static int __init dnet_init(void)
{
return platform_driver_register(&dnet_driver);
}
static void __exit dnet_exit(void)
{
platform_driver_unregister(&dnet_driver);
}
module_init(dnet_init);
module_exit(dnet_exit);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Dave DNET Ethernet driver");
MODULE_AUTHOR("Ilya Yanok <yanok@emcraft.com>, "
"Matteo Vit <matteo.vit@dave.eu>");

225
drivers/net/dnet.h Normal file
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@ -0,0 +1,225 @@
/*
* Dave DNET Ethernet Controller driver
*
* Copyright (C) 2008 Dave S.r.l. <www.dave.eu>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef _DNET_H
#define _DNET_H
#define DRV_NAME "dnet"
#define DRV_VERSION "0.9.1"
#define PFX DRV_NAME ": "
/* Register access macros */
#define dnet_writel(port, value, reg) \
writel((value), (port)->regs + DNET_##reg)
#define dnet_readl(port, reg) readl((port)->regs + DNET_##reg)
/* ALL DNET FIFO REGISTERS */
#define DNET_RX_LEN_FIFO 0x000 /* RX_LEN_FIFO */
#define DNET_RX_DATA_FIFO 0x004 /* RX_DATA_FIFO */
#define DNET_TX_LEN_FIFO 0x008 /* TX_LEN_FIFO */
#define DNET_TX_DATA_FIFO 0x00C /* TX_DATA_FIFO */
/* ALL DNET CONTROL/STATUS REGISTERS OFFSETS */
#define DNET_VERCAPS 0x100 /* VERCAPS */
#define DNET_INTR_SRC 0x104 /* INTR_SRC */
#define DNET_INTR_ENB 0x108 /* INTR_ENB */
#define DNET_RX_STATUS 0x10C /* RX_STATUS */
#define DNET_TX_STATUS 0x110 /* TX_STATUS */
#define DNET_RX_FRAMES_CNT 0x114 /* RX_FRAMES_CNT */
#define DNET_TX_FRAMES_CNT 0x118 /* TX_FRAMES_CNT */
#define DNET_RX_FIFO_TH 0x11C /* RX_FIFO_TH */
#define DNET_TX_FIFO_TH 0x120 /* TX_FIFO_TH */
#define DNET_SYS_CTL 0x124 /* SYS_CTL */
#define DNET_PAUSE_TMR 0x128 /* PAUSE_TMR */
#define DNET_RX_FIFO_WCNT 0x12C /* RX_FIFO_WCNT */
#define DNET_TX_FIFO_WCNT 0x130 /* TX_FIFO_WCNT */
/* ALL DNET MAC REGISTERS */
#define DNET_MACREG_DATA 0x200 /* Mac-Reg Data */
#define DNET_MACREG_ADDR 0x204 /* Mac-Reg Addr */
/* ALL DNET RX STATISTICS COUNTERS */
#define DNET_RX_PKT_IGNR_CNT 0x300
#define DNET_RX_LEN_CHK_ERR_CNT 0x304
#define DNET_RX_LNG_FRM_CNT 0x308
#define DNET_RX_SHRT_FRM_CNT 0x30C
#define DNET_RX_IPG_VIOL_CNT 0x310
#define DNET_RX_CRC_ERR_CNT 0x314
#define DNET_RX_OK_PKT_CNT 0x318
#define DNET_RX_CTL_FRM_CNT 0x31C
#define DNET_RX_PAUSE_FRM_CNT 0x320
#define DNET_RX_MULTICAST_CNT 0x324
#define DNET_RX_BROADCAST_CNT 0x328
#define DNET_RX_VLAN_TAG_CNT 0x32C
#define DNET_RX_PRE_SHRINK_CNT 0x330
#define DNET_RX_DRIB_NIB_CNT 0x334
#define DNET_RX_UNSUP_OPCD_CNT 0x338
#define DNET_RX_BYTE_CNT 0x33C
/* DNET TX STATISTICS COUNTERS */
#define DNET_TX_UNICAST_CNT 0x400
#define DNET_TX_PAUSE_FRM_CNT 0x404
#define DNET_TX_MULTICAST_CNT 0x408
#define DNET_TX_BRDCAST_CNT 0x40C
#define DNET_TX_VLAN_TAG_CNT 0x410
#define DNET_TX_BAD_FCS_CNT 0x414
#define DNET_TX_JUMBO_CNT 0x418
#define DNET_TX_BYTE_CNT 0x41C
/* SOME INTERNAL MAC-CORE REGISTER */
#define DNET_INTERNAL_MODE_REG 0x0
#define DNET_INTERNAL_RXTX_CONTROL_REG 0x2
#define DNET_INTERNAL_MAX_PKT_SIZE_REG 0x4
#define DNET_INTERNAL_IGP_REG 0x8
#define DNET_INTERNAL_MAC_ADDR_0_REG 0xa
#define DNET_INTERNAL_MAC_ADDR_1_REG 0xc
#define DNET_INTERNAL_MAC_ADDR_2_REG 0xe
#define DNET_INTERNAL_TX_RX_STS_REG 0x12
#define DNET_INTERNAL_GMII_MNG_CTL_REG 0x14
#define DNET_INTERNAL_GMII_MNG_DAT_REG 0x16
#define DNET_INTERNAL_GMII_MNG_CMD_FIN (1 << 14)
#define DNET_INTERNAL_WRITE (1 << 31)
/* MAC-CORE REGISTER FIELDS */
/* MAC-CORE MODE REGISTER FIELDS */
#define DNET_INTERNAL_MODE_GBITEN (1 << 0)
#define DNET_INTERNAL_MODE_FCEN (1 << 1)
#define DNET_INTERNAL_MODE_RXEN (1 << 2)
#define DNET_INTERNAL_MODE_TXEN (1 << 3)
/* MAC-CORE RXTX CONTROL REGISTER FIELDS */
#define DNET_INTERNAL_RXTX_CONTROL_RXSHORTFRAME (1 << 8)
#define DNET_INTERNAL_RXTX_CONTROL_RXBROADCAST (1 << 7)
#define DNET_INTERNAL_RXTX_CONTROL_RXMULTICAST (1 << 4)
#define DNET_INTERNAL_RXTX_CONTROL_RXPAUSE (1 << 3)
#define DNET_INTERNAL_RXTX_CONTROL_DISTXFCS (1 << 2)
#define DNET_INTERNAL_RXTX_CONTROL_DISCFXFCS (1 << 1)
#define DNET_INTERNAL_RXTX_CONTROL_ENPROMISC (1 << 0)
#define DNET_INTERNAL_RXTX_CONTROL_DROPCONTROL (1 << 6)
#define DNET_INTERNAL_RXTX_CONTROL_ENABLEHALFDUP (1 << 5)
/* SYSTEM CONTROL REGISTER FIELDS */
#define DNET_SYS_CTL_IGNORENEXTPKT (1 << 0)
#define DNET_SYS_CTL_SENDPAUSE (1 << 2)
#define DNET_SYS_CTL_RXFIFOFLUSH (1 << 3)
#define DNET_SYS_CTL_TXFIFOFLUSH (1 << 4)
/* TX STATUS REGISTER FIELDS */
#define DNET_TX_STATUS_FIFO_ALMOST_EMPTY (1 << 2)
#define DNET_TX_STATUS_FIFO_ALMOST_FULL (1 << 1)
/* INTERRUPT SOURCE REGISTER FIELDS */
#define DNET_INTR_SRC_TX_PKTSENT (1 << 0)
#define DNET_INTR_SRC_TX_FIFOAF (1 << 1)
#define DNET_INTR_SRC_TX_FIFOAE (1 << 2)
#define DNET_INTR_SRC_TX_DISCFRM (1 << 3)
#define DNET_INTR_SRC_TX_FIFOFULL (1 << 4)
#define DNET_INTR_SRC_RX_CMDFIFOAF (1 << 8)
#define DNET_INTR_SRC_RX_CMDFIFOFF (1 << 9)
#define DNET_INTR_SRC_RX_DATAFIFOFF (1 << 10)
#define DNET_INTR_SRC_TX_SUMMARY (1 << 16)
#define DNET_INTR_SRC_RX_SUMMARY (1 << 17)
#define DNET_INTR_SRC_PHY (1 << 19)
/* INTERRUPT ENABLE REGISTER FIELDS */
#define DNET_INTR_ENB_TX_PKTSENT (1 << 0)
#define DNET_INTR_ENB_TX_FIFOAF (1 << 1)
#define DNET_INTR_ENB_TX_FIFOAE (1 << 2)
#define DNET_INTR_ENB_TX_DISCFRM (1 << 3)
#define DNET_INTR_ENB_TX_FIFOFULL (1 << 4)
#define DNET_INTR_ENB_RX_PKTRDY (1 << 8)
#define DNET_INTR_ENB_RX_FIFOAF (1 << 9)
#define DNET_INTR_ENB_RX_FIFOERR (1 << 10)
#define DNET_INTR_ENB_RX_ERROR (1 << 11)
#define DNET_INTR_ENB_RX_FIFOFULL (1 << 12)
#define DNET_INTR_ENB_RX_FIFOAE (1 << 13)
#define DNET_INTR_ENB_TX_SUMMARY (1 << 16)
#define DNET_INTR_ENB_RX_SUMMARY (1 << 17)
#define DNET_INTR_ENB_GLOBAL_ENABLE (1 << 18)
/* default values:
* almost empty = less than one full sized ethernet frame (no jumbo) inside
* the fifo almost full = can write less than one full sized ethernet frame
* (no jumbo) inside the fifo
*/
#define DNET_CFG_TX_FIFO_FULL_THRES 25
#define DNET_CFG_RX_FIFO_FULL_THRES 20
/*
* Capabilities. Used by the driver to know the capabilities that the ethernet
* controller inside the FPGA have.
*/
#define DNET_HAS_MDIO (1 << 0)
#define DNET_HAS_IRQ (1 << 1)
#define DNET_HAS_GIGABIT (1 << 2)
#define DNET_HAS_DMA (1 << 3)
#define DNET_HAS_MII (1 << 4) /* or GMII */
#define DNET_HAS_RMII (1 << 5) /* or RGMII */
#define DNET_CAPS_MASK 0xFFFF
#define DNET_FIFO_SIZE 1024 /* 1K x 32 bit */
#define DNET_FIFO_TX_DATA_AF_TH (DNET_FIFO_SIZE - 384) /* 384 = 1536 / 4 */
#define DNET_FIFO_TX_DATA_AE_TH 384
#define DNET_FIFO_RX_CMD_AF_TH (1 << 16) /* just one frame inside the FIFO */
/*
* Hardware-collected statistics.
*/
struct dnet_stats {
u32 rx_pkt_ignr;
u32 rx_len_chk_err;
u32 rx_lng_frm;
u32 rx_shrt_frm;
u32 rx_ipg_viol;
u32 rx_crc_err;
u32 rx_ok_pkt;
u32 rx_ctl_frm;
u32 rx_pause_frm;
u32 rx_multicast;
u32 rx_broadcast;
u32 rx_vlan_tag;
u32 rx_pre_shrink;
u32 rx_drib_nib;
u32 rx_unsup_opcd;
u32 rx_byte;
u32 tx_unicast;
u32 tx_pause_frm;
u32 tx_multicast;
u32 tx_brdcast;
u32 tx_vlan_tag;
u32 tx_bad_fcs;
u32 tx_jumbo;
u32 tx_byte;
};
struct dnet {
void __iomem *regs;
spinlock_t lock;
struct platform_device *pdev;
struct net_device *dev;
struct dnet_stats hw_stats;
unsigned int capabilities; /* read from FPGA */
struct napi_struct napi;
/* PHY stuff */
struct mii_bus *mii_bus;
struct phy_device *phy_dev;
unsigned int link;
unsigned int speed;
unsigned int duplex;
};
#endif /* _DNET_H */