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Commit 3b2f1919 authored by Kumar Gala's avatar Kumar Gala Committed by Linus Torvalds
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[PATCH] add new ethernet driver 'gianfar'

parent 6392f9cb
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drivers/net/Kconfig
View file @ 3b2f1919
......@@ -2131,6 +2131,17 @@ config TIGON3
To compile this driver as a module, choose M here: the module
will be called tg3. This is recommended.
config GIANFAR
tristate "Gianfar Ethernet"
depends on 85xx
help
This driver supports the Gigabit TSEC on the MPC85xx
family of chips, and the FEC on the 8540
config GFAR_NAPI
bool "NAPI Support"
depends on GIANFAR
endmenu
#
......
drivers/net/Makefile
View file @ 3b2f1919
......@@ -10,6 +10,7 @@ obj-$(CONFIG_E1000) += e1000/
obj-$(CONFIG_IBM_EMAC) += ibm_emac/
obj-$(CONFIG_IXGB) += ixgb/
obj-$(CONFIG_BONDING) += bonding/
obj-$(CONFIG_GIANFAR) += gianfar.o gianfar_ethtool.o gianfar_phy.o
#
# link order important here
......
drivers/net/gianfar.c 0 → 100644
View file @ 3b2f1919
/*
* drivers/net/gianfar.c
*
* Gianfar Ethernet Driver
* Driver for FEC on MPC8540 and TSEC on MPC8540/MPC8560
* Based on 8260_io/fcc_enet.c
*
* Author: Andy Fleming
* Maintainer: Kumar Gala (kumar.gala@freescale.com)
*
* Copyright 2004 Freescale Semiconductor, Inc
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* Gianfar: AKA Lambda Draconis, "Dragon"
* RA 11 31 24.2
* Dec +69 19 52
* V 3.84
* B-V +1.62
*
* Theory of operation
* This driver is designed for the Triple-speed Ethernet
* controllers on the Freescale 8540/8560 integrated processors,
* as well as the Fast Ethernet Controller on the 8540.
*
* The driver is initialized through OCP. Structures which
* define the configuration needed by the board are defined in a
* board structure in arch/ppc/platforms (though I do not
* discount the possibility that other architectures could one
* day be supported. One assumption the driver currently makes
* is that the PHY is configured in such a way to advertise all
* capabilities. This is a sensible default, and on certain
* PHYs, changing this default encounters substantial errata
* issues. Future versions may remove this requirement, but for
* now, it is best for the firmware to ensure this is the case.
*
* The Gianfar Ethernet Controller uses a ring of buffer
* descriptors. The beginning is indicated by a register
* pointing to the physical address of the start of the ring.
* The end is determined by a "wrap" bit being set in the
* last descriptor of the ring.
*
* When a packet is received, the RXF bit in the
* IEVENT register is set, triggering an interrupt when the
* corresponding bit in the IMASK register is also set (if
* interrupt coalescing is active, then the interrupt may not
* happen immediately, but will wait until either a set number
* of frames or amount of time have passed.). In NAPI, the
* interrupt handler will signal there is work to be done, and
* exit. Without NAPI, the packet(s) will be handled
* immediately. Both methods will start at the last known empty
* descriptor, and process every subsequent descriptor until there
* are none left with data (NAPI will stop after a set number of
* packets to give time to other tasks, but will eventually
* process all the packets). The data arrives inside a
* pre-allocated skb, and so after the skb is passed up to the
* stack, a new skb must be allocated, and the address field in
* the buffer descriptor must be updated to indicate this new
* skb.
*
* When the kernel requests that a packet be transmitted, the
* driver starts where it left off last time, and points the
* descriptor at the buffer which was passed in. The driver
* then informs the DMA engine that there are packets ready to
* be transmitted. Once the controller is finished transmitting
* the packet, an interrupt may be triggered (under the same
* conditions as for reception, but depending on the TXF bit).
* The driver then cleans up the buffer.
*/
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/interrupt.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/mm.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/uaccess.h>
#include <linux/module.h>
#include <linux/version.h>
#include <linux/dma-mapping.h>
#include <linux/crc32.h>
#include "gianfar.h"
#include "gianfar_phy.h"
#ifdef CONFIG_NET_FASTROUTE
#include <linux/if_arp.h>
#include <net/ip.h>
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,41)
#define irqreturn_t void
#define IRQ_HANDLED
#endif
#define TX_TIMEOUT (1*HZ)
#define SKB_ALLOC_TIMEOUT 1000000
#undef BRIEF_GFAR_ERRORS
#undef VERBOSE_GFAR_ERRORS
#ifdef CONFIG_GFAR_NAPI
#define RECEIVE(x) netif_receive_skb(x)
#else
#define RECEIVE(x) netif_rx(x)
#endif
#define DEVICE_NAME "%s: Gianfar Ethernet Controller Version 1.0, "
char gfar_driver_name[] = "Gianfar Ethernet";
char gfar_driver_version[] = "1.0";
int startup_gfar(struct net_device *dev);
static int gfar_enet_open(struct net_device *dev);
static int gfar_start_xmit(struct sk_buff *skb, struct net_device *dev);
static void gfar_timeout(struct net_device *dev);
static int gfar_close(struct net_device *dev);
struct sk_buff *gfar_new_skb(struct net_device *dev, struct rxbd8 *bdp);
static struct net_device_stats *gfar_get_stats(struct net_device *dev);
static int gfar_set_mac_address(struct net_device *dev);
static int gfar_change_mtu(struct net_device *dev, int new_mtu);
static irqreturn_t gfar_error(int irq, void *dev_id, struct pt_regs *regs);
static irqreturn_t gfar_transmit(int irq, void *dev_id, struct pt_regs *regs);
irqreturn_t gfar_receive(int irq, void *dev_id, struct pt_regs *regs);
static irqreturn_t gfar_interrupt(int irq, void *dev_id, struct pt_regs *regs);
static irqreturn_t phy_interrupt(int irq, void *dev_id, struct pt_regs *regs);
static void gfar_phy_change(void *data);
static void gfar_phy_timer(unsigned long data);
static void adjust_link(struct net_device *dev);
static void init_registers(struct net_device *dev);
static int init_phy(struct net_device *dev);
static int gfar_probe(struct ocp_device *ocpdev);
static void gfar_remove(struct ocp_device *ocpdev);
void free_skb_resources(struct gfar_private *priv);
static void gfar_set_multi(struct net_device *dev);
static void gfar_set_hash_for_addr(struct net_device *dev, u8 *addr);
#ifdef CONFIG_GFAR_NAPI
static int gfar_poll(struct net_device *dev, int *budget);
#endif
#ifdef CONFIG_NET_FASTROUTE
static int gfar_accept_fastpath(struct net_device *dev, struct dst_entry *dst);
#endif
static inline int try_fastroute(struct sk_buff *skb, struct net_device *dev, int length);
#ifdef CONFIG_GFAR_NAPI
static int gfar_clean_rx_ring(struct net_device *dev, int rx_work_limit);
#else
static int gfar_clean_rx_ring(struct net_device *dev);
#endif
static int gfar_process_frame(struct net_device *dev, struct sk_buff *skb, int length);
extern struct ethtool_ops gfar_ethtool_ops;
extern void gfar_gstrings_normon(struct net_device *dev, u32 stringset,
u8 * buf);
extern void gfar_fill_stats_normon(struct net_device *dev,
struct ethtool_stats *dummy, u64 * buf);
extern int gfar_stats_count_normon(struct net_device *dev);
MODULE_AUTHOR("Freescale Semiconductor, Inc");
MODULE_DESCRIPTION("Gianfar Ethernet Driver");
MODULE_LICENSE("GPL");
/* Called by the ocp code to initialize device data structures
* required for bringing up the device
* returns 0 on success */
static int gfar_probe(struct ocp_device *ocpdev)
{
u32 tempval;
struct ocp_device *mdiodev;
struct net_device *dev = NULL;
struct gfar_private *priv = NULL;
struct ocp_gfar_data *einfo;
int idx;
int err = 0;
struct ethtool_ops *dev_ethtool_ops;
einfo = (struct ocp_gfar_data *) ocpdev->def->additions;
if (einfo == NULL) {
printk(KERN_ERR "gfar %d: Missing additional data!\n",
ocpdev->def->index);
return -ENODEV;
}
/* get a pointer to the register memory which can
* configure the PHYs. If it's different from this set,
* get the device which has those regs */
if ((einfo->phyregidx >= 0) && (einfo->phyregidx != ocpdev->def->index)) {
mdiodev = ocp_find_device(OCP_ANY_ID,
OCP_FUNC_GFAR, einfo->phyregidx);
/* If the device which holds the MDIO regs isn't
* up, wait for it to come up */
if (mdiodev == NULL)
return -EAGAIN;
} else {
mdiodev = ocpdev;
}
/* Create an ethernet device instance */
dev = alloc_etherdev(sizeof (*priv));
if (dev == NULL)
return -ENOMEM;
priv = netdev_priv(dev);
/* Set the info in the priv to the current info */
priv->einfo = einfo;
/* get a pointer to the register memory */
priv->regs = (struct gfar *)
ioremap(ocpdev->def->paddr, sizeof (struct gfar));
if (priv->regs == NULL) {
err = -ENOMEM;
goto regs_fail;
}
/* Set the PHY base address */
priv->phyregs = (struct gfar *)
ioremap(mdiodev->def->paddr, sizeof (struct gfar));
if (priv->phyregs == NULL) {
err = -ENOMEM;
goto phy_regs_fail;
}
ocp_set_drvdata(ocpdev, dev);
/* Stop the DMA engine now, in case it was running before */
/* (The firmware could have used it, and left it running). */
/* To do this, we write Graceful Receive Stop and Graceful */
/* Transmit Stop, and then wait until the corresponding bits */
/* in IEVENT indicate the stops have completed. */
tempval = gfar_read(&priv->regs->dmactrl);
tempval &= ~(DMACTRL_GRS | DMACTRL_GTS);
gfar_write(&priv->regs->dmactrl, tempval);
tempval = gfar_read(&priv->regs->dmactrl);
tempval |= (DMACTRL_GRS | DMACTRL_GTS);
gfar_write(&priv->regs->dmactrl, tempval);
while (!(gfar_read(&priv->regs->ievent) & (IEVENT_GRSC | IEVENT_GTSC)))
cpu_relax();
/* Reset MAC layer */
gfar_write(&priv->regs->maccfg1, MACCFG1_SOFT_RESET);
tempval = (MACCFG1_TX_FLOW | MACCFG1_RX_FLOW);
gfar_write(&priv->regs->maccfg1, tempval);
/* Initialize MACCFG2. */
gfar_write(&priv->regs->maccfg2, MACCFG2_INIT_SETTINGS);
/* Initialize ECNTRL */
gfar_write(&priv->regs->ecntrl, ECNTRL_INIT_SETTINGS);
/* Copy the station address into the dev structure, */
/* and into the address registers MAC_STNADDR1,2. */
/* Backwards, because little endian MACs are dumb. */
/* Don't set the regs if the firmware already did */
memcpy(dev->dev_addr, einfo->mac_addr, MAC_ADDR_LEN);
/* Set the dev->base_addr to the gfar reg region */
dev->base_addr = (unsigned long) (priv->regs);
SET_MODULE_OWNER(dev);
/* Fill in the dev structure */
dev->open = gfar_enet_open;
dev->hard_start_xmit = gfar_start_xmit;
dev->tx_timeout = gfar_timeout;
dev->watchdog_timeo = TX_TIMEOUT;
#ifdef CONFIG_GFAR_NAPI
dev->poll = gfar_poll;
dev->weight = GFAR_DEV_WEIGHT;
#endif
dev->stop = gfar_close;
dev->get_stats = gfar_get_stats;
dev->change_mtu = gfar_change_mtu;
dev->mtu = 1500;
dev->set_multicast_list = gfar_set_multi;
dev->flags |= IFF_MULTICAST;
dev_ethtool_ops =
(struct ethtool_ops *)kmalloc(sizeof(struct ethtool_ops),
GFP_KERNEL);
if(dev_ethtool_ops == NULL) {
err = -ENOMEM;
goto ethtool_fail;
}
memcpy(dev_ethtool_ops, &gfar_ethtool_ops, sizeof(gfar_ethtool_ops));
/* If there is no RMON support in this device, we don't
* want to expose non-existant statistics */
if((priv->einfo->flags & GFAR_HAS_RMON) == 0) {
dev_ethtool_ops->get_strings = gfar_gstrings_normon;
dev_ethtool_ops->get_stats_count = gfar_stats_count_normon;
dev_ethtool_ops->get_ethtool_stats = gfar_fill_stats_normon;
}
if((priv->einfo->flags & GFAR_HAS_COALESCE) == 0) {
dev_ethtool_ops->set_coalesce = NULL;
dev_ethtool_ops->get_coalesce = NULL;
}
dev->ethtool_ops = dev_ethtool_ops;
#ifdef CONFIG_NET_FASTROUTE
dev->accept_fastpath = gfar_accept_fastpath;
#endif
priv->rx_buffer_size = DEFAULT_RX_BUFFER_SIZE;
#ifdef CONFIG_GFAR_BUFSTASH
priv->rx_stash_size = STASH_LENGTH;
#endif
priv->tx_ring_size = DEFAULT_TX_RING_SIZE;
priv->rx_ring_size = DEFAULT_RX_RING_SIZE;
/* Initially, coalescing is disabled */
priv->txcoalescing = 0;
priv->txcount = 0;
priv->txtime = 0;
priv->rxcoalescing = 0;
priv->rxcount = 0;
priv->rxtime = 0;
err = register_netdev(dev);
if (err) {
printk(KERN_ERR "%s: Cannot register net device, aborting.\n",
dev->name);
goto register_fail;
}
/* Print out the device info */
printk(DEVICE_NAME, dev->name);
for (idx = 0; idx < 6; idx++)
printk("%2.2x%c", dev->dev_addr[idx], idx == 5 ? ' ' : ':');
printk("\n");
/* Even more device info helps when determining which kernel */
/* provided which set of benchmarks. Since this is global for all */
/* devices, we only print it once */
#ifdef CONFIG_GFAR_NAPI
printk(KERN_INFO "%s: Running with NAPI enabled\n", dev->name);
#else
printk(KERN_INFO "%s: Running with NAPI disabled\n", dev->name);
#endif
printk(KERN_INFO "%s: %d/%d RX/TX BD ring size\n",
dev->name, priv->rx_ring_size, priv->tx_ring_size);
return 0;
register_fail:
kfree(dev_ethtool_ops);
ethtool_fail:
iounmap((void *) priv->phyregs);
phy_regs_fail:
iounmap((void *) priv->regs);
regs_fail:
free_netdev(dev);
return -ENOMEM;
}
static void gfar_remove(struct ocp_device *ocpdev)
{
struct net_device *dev = ocp_get_drvdata(ocpdev);
struct gfar_private *priv = netdev_priv(dev);
ocp_set_drvdata(ocpdev, NULL);
kfree(dev->ethtool_ops);
iounmap((void *) priv->regs);
iounmap((void *) priv->phyregs);
free_netdev(dev);
}
/* Configure the PHY for dev.
* returns 0 if success. -1 if failure
*/
static int init_phy(struct net_device *dev)
{
struct gfar_private *priv = netdev_priv(dev);
struct phy_info *curphy;
priv->link = 1;
priv->oldlink = 0;
priv->oldspeed = 0;
priv->olddplx = -1;
/* get info for this PHY */
curphy = get_phy_info(dev);
if (curphy == NULL) {
printk(KERN_ERR "%s: No PHY found\n", dev->name);
return -1;
}
priv->phyinfo = curphy;
/* Run the commands which configure the PHY */
phy_run_commands(dev, curphy->config);
return 0;
}
static void init_registers(struct net_device *dev)
{
struct gfar_private *priv = netdev_priv(dev);
/* Clear IEVENT */
gfar_write(&priv->regs->ievent, IEVENT_INIT_CLEAR);
/* Initialize IMASK */
gfar_write(&priv->regs->imask, IMASK_INIT_CLEAR);
/* Init hash registers to zero */
gfar_write(&priv->regs->iaddr0, 0);
gfar_write(&priv->regs->iaddr1, 0);
gfar_write(&priv->regs->iaddr2, 0);
gfar_write(&priv->regs->iaddr3, 0);
gfar_write(&priv->regs->iaddr4, 0);
gfar_write(&priv->regs->iaddr5, 0);
gfar_write(&priv->regs->iaddr6, 0);
gfar_write(&priv->regs->iaddr7, 0);
gfar_write(&priv->regs->gaddr0, 0);
gfar_write(&priv->regs->gaddr1, 0);
gfar_write(&priv->regs->gaddr2, 0);
gfar_write(&priv->regs->gaddr3, 0);
gfar_write(&priv->regs->gaddr4, 0);
gfar_write(&priv->regs->gaddr5, 0);
gfar_write(&priv->regs->gaddr6, 0);
gfar_write(&priv->regs->gaddr7, 0);
/* Zero out rctrl */
gfar_write(&priv->regs->rctrl, 0x00000000);
/* Zero out the rmon mib registers if it has them */
if (priv->einfo->flags & GFAR_HAS_RMON) {
memset((void *) &(priv->regs->rmon), 0,
sizeof (struct rmon_mib));
/* Mask off the CAM interrupts */
gfar_write(&priv->regs->rmon.cam1, 0xffffffff);
gfar_write(&priv->regs->rmon.cam2, 0xffffffff);
}
/* Initialize the max receive buffer length */
gfar_write(&priv->regs->mrblr, priv->rx_buffer_size);
#ifdef CONFIG_GFAR_BUFSTASH
/* If we are stashing buffers, we need to set the
* extraction length to the size of the buffer */
gfar_write(&priv->regs->attreli, priv->rx_stash_size << 16);
#endif
/* Initialize the Minimum Frame Length Register */
gfar_write(&priv->regs->minflr, MINFLR_INIT_SETTINGS);
/* Setup Attributes so that snooping is on for rx */
gfar_write(&priv->regs->attr, ATTR_INIT_SETTINGS);
gfar_write(&priv->regs->attreli, ATTRELI_INIT_SETTINGS);
/* Assign the TBI an address which won't conflict with the PHYs */
gfar_write(&priv->regs->tbipa, TBIPA_VALUE);
}
void stop_gfar(struct net_device *dev)
{
struct gfar_private *priv = netdev_priv(dev);
struct gfar *regs = priv->regs;
unsigned long flags;
u32 tempval;
/* Lock it down */
spin_lock_irqsave(&priv->lock, flags);
/* Tell the kernel the link is down */
priv->link = 0;
adjust_link(dev);
/* Mask all interrupts */
gfar_write(&regs->imask, IMASK_INIT_CLEAR);
/* Clear all interrupts */
gfar_write(&regs->ievent, IEVENT_INIT_CLEAR);
/* Stop the DMA, and wait for it to stop */
tempval = gfar_read(&priv->regs->dmactrl);
if ((tempval & (DMACTRL_GRS | DMACTRL_GTS))
!= (DMACTRL_GRS | DMACTRL_GTS)) {
tempval |= (DMACTRL_GRS | DMACTRL_GTS);
gfar_write(&priv->regs->dmactrl, tempval);
while (!(gfar_read(&priv->regs->ievent) &
(IEVENT_GRSC | IEVENT_GTSC)))
cpu_relax();
}
/* Disable Rx and Tx */
tempval = gfar_read(&regs->maccfg1);
tempval &= ~(MACCFG1_RX_EN | MACCFG1_TX_EN);
gfar_write(&regs->maccfg1, tempval);
if (priv->einfo->flags & GFAR_HAS_PHY_INTR) {
phy_run_commands(dev, priv->phyinfo->shutdown);
}
spin_unlock_irqrestore(&priv->lock, flags);
/* Free the IRQs */
if (priv->einfo->flags & GFAR_HAS_MULTI_INTR) {
free_irq(priv->einfo->interruptError, dev);
free_irq(priv->einfo->interruptTransmit, dev);
free_irq(priv->einfo->interruptReceive, dev);
} else {
free_irq(priv->einfo->interruptTransmit, dev);
}
if (priv->einfo->flags & GFAR_HAS_PHY_INTR) {
free_irq(priv->einfo->interruptPHY, dev);
} else {
del_timer_sync(&priv->phy_info_timer);
}
free_skb_resources(priv);
dma_unmap_single(NULL, gfar_read(&regs->tbase),
sizeof(struct txbd)*priv->tx_ring_size,
DMA_BIDIRECTIONAL);
dma_unmap_single(NULL, gfar_read(&regs->rbase),
sizeof(struct rxbd)*priv->rx_ring_size,
DMA_BIDIRECTIONAL);
/* Free the buffer descriptors */
kfree(priv->tx_bd_base);
}
/* If there are any tx skbs or rx skbs still around, free them.
* Then free tx_skbuff and rx_skbuff */
void free_skb_resources(struct gfar_private *priv)
{
struct rxbd8 *rxbdp;
struct txbd8 *txbdp;
int i;
/* Go through all the buffer descriptors and free their data buffers */
txbdp = priv->tx_bd_base;
for (i = 0; i < priv->tx_ring_size; i++) {
if (priv->tx_skbuff[i]) {
dma_unmap_single(NULL, txbdp->bufPtr,
txbdp->length,
DMA_TO_DEVICE);
dev_kfree_skb_any(priv->tx_skbuff[i]);
priv->tx_skbuff[i] = NULL;
}
}
kfree(priv->tx_skbuff);
rxbdp = priv->rx_bd_base;
/* rx_skbuff is not guaranteed to be allocated, so only
* free it and its contents if it is allocated */
if(priv->rx_skbuff != NULL) {
for (i = 0; i < priv->rx_ring_size; i++) {
if (priv->rx_skbuff[i]) {
dma_unmap_single(NULL, rxbdp->bufPtr,
priv->rx_buffer_size
+ RXBUF_ALIGNMENT,
DMA_FROM_DEVICE);
dev_kfree_skb_any(priv->rx_skbuff[i]);
priv->rx_skbuff[i] = NULL;
}
rxbdp->status = 0;
rxbdp->length = 0;
rxbdp->bufPtr = 0;
rxbdp++;
}
kfree(priv->rx_skbuff);
}
}
/* Bring the controller up and running */
int startup_gfar(struct net_device *dev)
{
struct txbd8 *txbdp;
struct rxbd8 *rxbdp;
unsigned long addr;
int i;
struct gfar_private *priv = netdev_priv(dev);
struct gfar *regs = priv->regs;
u32 tempval;
int err = 0;
gfar_write(&regs->imask, IMASK_INIT_CLEAR);
/* Allocate memory for the buffer descriptors */
addr =
(unsigned int) kmalloc(sizeof (struct txbd8) * priv->tx_ring_size +
sizeof (struct rxbd8) * priv->rx_ring_size,
GFP_KERNEL);
if (addr == 0) {
printk(KERN_ERR "%s: Could not allocate buffer descriptors!\n",
dev->name);
return -ENOMEM;
}
priv->tx_bd_base = (struct txbd8 *) addr;
/* enet DMA only understands physical addresses */
gfar_write(&regs->tbase,
dma_map_single(NULL, (void *)addr,
sizeof(struct txbd8) * priv->tx_ring_size,
DMA_BIDIRECTIONAL));
/* Start the rx descriptor ring where the tx ring leaves off */
addr = addr + sizeof (struct txbd8) * priv->tx_ring_size;
priv->rx_bd_base = (struct rxbd8 *) addr;
gfar_write(&regs->rbase,
dma_map_single(NULL, (void *)addr,
sizeof(struct rxbd8) * priv->rx_ring_size,
DMA_BIDIRECTIONAL));
/* Setup the skbuff rings */
priv->tx_skbuff =
(struct sk_buff **) kmalloc(sizeof (struct sk_buff *) *
priv->tx_ring_size, GFP_KERNEL);
if (priv->tx_skbuff == NULL) {
printk(KERN_ERR "%s: Could not allocate tx_skbuff\n",
dev->name);
err = -ENOMEM;
goto tx_skb_fail;
}
for (i = 0; i < priv->tx_ring_size; i++)
priv->tx_skbuff[i] = NULL;
priv->rx_skbuff =
(struct sk_buff **) kmalloc(sizeof (struct sk_buff *) *
priv->rx_ring_size, GFP_KERNEL);
if (priv->rx_skbuff == NULL) {
printk(KERN_ERR "%s: Could not allocate rx_skbuff\n",
dev->name);
err = -ENOMEM;
goto rx_skb_fail;
}
for (i = 0; i < priv->rx_ring_size; i++)
priv->rx_skbuff[i] = NULL;
/* Initialize some variables in our dev structure */
priv->dirty_tx = priv->cur_tx = priv->tx_bd_base;
priv->cur_rx = priv->rx_bd_base;
priv->skb_curtx = priv->skb_dirtytx = 0;
priv->skb_currx = 0;
/* Initialize Transmit Descriptor Ring */
txbdp = priv->tx_bd_base;
for (i = 0; i < priv->tx_ring_size; i++) {
txbdp->status = 0;
txbdp->length = 0;
txbdp->bufPtr = 0;
txbdp++;
}
/* Set the last descriptor in the ring to indicate wrap */
txbdp--;
txbdp->status |= TXBD_WRAP;
rxbdp = priv->rx_bd_base;
for (i = 0; i < priv->rx_ring_size; i++) {
struct sk_buff *skb = NULL;
rxbdp->status = 0;
skb = gfar_new_skb(dev, rxbdp);
priv->rx_skbuff[i] = skb;
rxbdp++;
}
/* Set the last descriptor in the ring to wrap */
rxbdp--;
rxbdp->status |= RXBD_WRAP;
/* If the device has multiple interrupts, register for
* them. Otherwise, only register for the one */
if (priv->einfo->flags & GFAR_HAS_MULTI_INTR) {
/* Install our interrupt handlers for Error,
* Transmit, and Receive */
if (request_irq(priv->einfo->interruptError, gfar_error,
0, "enet_error", dev) < 0) {
printk(KERN_ERR "%s: Can't get IRQ %d\n",
dev->name, priv->einfo->interruptError);
err = -1;
goto err_irq_fail;
}
if (request_irq(priv->einfo->interruptTransmit, gfar_transmit,
0, "enet_tx", dev) < 0) {
printk(KERN_ERR "%s: Can't get IRQ %d\n",
dev->name, priv->einfo->interruptTransmit);
err = -1;
goto tx_irq_fail;
}
if (request_irq(priv->einfo->interruptReceive, gfar_receive,
0, "enet_rx", dev) < 0) {
printk(KERN_ERR "%s: Can't get IRQ %d (receive0)\n",
dev->name, priv->einfo->interruptReceive);
err = -1;
goto rx_irq_fail;
}
} else {
if (request_irq(priv->einfo->interruptTransmit, gfar_interrupt,
0, "gfar_interrupt", dev) < 0) {
printk(KERN_ERR "%s: Can't get IRQ %d\n",
dev->name, priv->einfo->interruptError);
err = -1;
goto err_irq_fail;
}
}
/* Grab the PHY interrupt */
if (priv->einfo->flags & GFAR_HAS_PHY_INTR) {
if (request_irq(priv->einfo->interruptPHY, phy_interrupt,
SA_SHIRQ, "phy_interrupt", dev) < 0) {
printk(KERN_ERR "%s: Can't get IRQ %d (PHY)\n",
dev->name, priv->einfo->interruptPHY);
err = -1;
if (priv->einfo->flags & GFAR_HAS_MULTI_INTR)
goto phy_irq_fail;
else
goto tx_irq_fail;
}
} else {
init_timer(&priv->phy_info_timer);
priv->phy_info_timer.function = &gfar_phy_timer;
priv->phy_info_timer.data = (unsigned long) dev;
mod_timer(&priv->phy_info_timer, jiffies + 2 * HZ);
}
/* Set up the bottom half queue */
INIT_WORK(&priv->tq, (void (*)(void *))gfar_phy_change, dev);
/* Configure the PHY interrupt */
phy_run_commands(dev, priv->phyinfo->startup);
/* Tell the kernel the link is up, and determine the
* negotiated features (speed, duplex) */
adjust_link(dev);
if (priv->link == 0)
printk(KERN_INFO "%s: No link detected\n", dev->name);
/* Configure the coalescing support */
if (priv->txcoalescing)
gfar_write(&regs->txic,
mk_ic_value(priv->txcount, priv->txtime));
else
gfar_write(&regs->txic, 0);
if (priv->rxcoalescing)
gfar_write(&regs->rxic,
mk_ic_value(priv->rxcount, priv->rxtime));
else
gfar_write(&regs->rxic, 0);
init_waitqueue_head(&priv->rxcleanupq);
/* Enable Rx and Tx in MACCFG1 */
tempval = gfar_read(&regs->maccfg1);
tempval |= (MACCFG1_RX_EN | MACCFG1_TX_EN);
gfar_write(&regs->maccfg1, tempval);
/* Initialize DMACTRL to have WWR and WOP */
tempval = gfar_read(&priv->regs->dmactrl);
tempval |= DMACTRL_INIT_SETTINGS;
gfar_write(&priv->regs->dmactrl, tempval);
/* Clear THLT, so that the DMA starts polling now */
gfar_write(&regs->tstat, TSTAT_CLEAR_THALT);
/* Make sure we aren't stopped */
tempval = gfar_read(&priv->regs->dmactrl);
tempval &= ~(DMACTRL_GRS | DMACTRL_GTS);
gfar_write(&priv->regs->dmactrl, tempval);
/* Unmask the interrupts we look for */
gfar_write(&regs->imask, IMASK_DEFAULT);
return 0;
phy_irq_fail:
free_irq(priv->einfo->interruptReceive, dev);
rx_irq_fail:
free_irq(priv->einfo->interruptTransmit, dev);
tx_irq_fail:
free_irq(priv->einfo->interruptError, dev);
err_irq_fail:
rx_skb_fail:
free_skb_resources(priv);
tx_skb_fail:
kfree(priv->tx_bd_base);
return err;
}
/* Called when something needs to use the ethernet device */
/* Returns 0 for success. */
static int gfar_enet_open(struct net_device *dev)
{
int err;
/* Initialize a bunch of registers */
init_registers(dev);
gfar_set_mac_address(dev);
err = init_phy(dev);
if (err)
return err;
err = startup_gfar(dev);
netif_start_queue(dev);
return err;
}
/* This is called by the kernel when a frame is ready for transmission. */
/* It is pointed to by the dev->hard_start_xmit function pointer */
static int gfar_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct gfar_private *priv = netdev_priv(dev);
struct txbd8 *txbdp;
/* Update transmit stats */
priv->stats.tx_bytes += skb->len;
/* Lock priv now */
spin_lock_irq(&priv->lock);
/* Point at the first free tx descriptor */
txbdp = priv->cur_tx;
/* Clear all but the WRAP status flags */
txbdp->status &= TXBD_WRAP;
/* Set buffer length and pointer */
txbdp->length = skb->len;
txbdp->bufPtr = dma_map_single(NULL, skb->data,
skb->len, DMA_TO_DEVICE);
/* Save the skb pointer so we can free it later */
priv->tx_skbuff[priv->skb_curtx] = skb;
/* Update the current skb pointer (wrapping if this was the last) */
priv->skb_curtx =
(priv->skb_curtx + 1) & TX_RING_MOD_MASK(priv->tx_ring_size);
/* Flag the BD as interrupt-causing */
txbdp->status |= TXBD_INTERRUPT;
/* Flag the BD as ready to go, last in frame, and */
/* in need of CRC */
txbdp->status |= (TXBD_READY | TXBD_LAST | TXBD_CRC);
dev->trans_start = jiffies;
/* If this was the last BD in the ring, the next one */
/* is at the beginning of the ring */
if (txbdp->status & TXBD_WRAP)
txbdp = priv->tx_bd_base;
else
txbdp++;
/* If the next BD still needs to be cleaned up, then the bds
are full. We need to tell the kernel to stop sending us stuff. */
if (txbdp == priv->dirty_tx) {
netif_stop_queue(dev);
priv->stats.tx_fifo_errors++;
}
/* Update the current txbd to the next one */
priv->cur_tx = txbdp;
/* Tell the DMA to go go go */
gfar_write(&priv->regs->tstat, TSTAT_CLEAR_THALT);
/* Unlock priv */
spin_unlock_irq(&priv->lock);
return 0;
}
/* Stops the kernel queue, and halts the controller */
static int gfar_close(struct net_device *dev)
{
stop_gfar(dev);
netif_stop_queue(dev);
return 0;
}
/* returns a net_device_stats structure pointer */
static struct net_device_stats * gfar_get_stats(struct net_device *dev)
{
struct gfar_private *priv = netdev_priv(dev);
return &(priv->stats);
}
/* Changes the mac address if the controller is not running. */
int gfar_set_mac_address(struct net_device *dev)
{
struct gfar_private *priv = netdev_priv(dev);
int i;
char tmpbuf[MAC_ADDR_LEN];
u32 tempval;
/* Now copy it into the mac registers backwards, cuz */
/* little endian is silly */
for (i = 0; i < MAC_ADDR_LEN; i++)
tmpbuf[MAC_ADDR_LEN - 1 - i] = dev->dev_addr[i];
gfar_write(&priv->regs->macstnaddr1, *((u32 *) (tmpbuf)));
tempval = *((u32 *) (tmpbuf + 4));
gfar_write(&priv->regs->macstnaddr2, tempval);
return 0;
}
/**********************************************************************
* gfar_accept_fastpath
*
* Used to authenticate to the kernel that a fast path entry can be
* added to device's routing table cache
*
* Input : pointer to ethernet interface network device structure and
* a pointer to the designated entry to be added to the cache.
* Output : zero upon success, negative upon failure
**********************************************************************/
#ifdef CONFIG_NET_FASTROUTE
static int gfar_accept_fastpath(struct net_device *dev, struct dst_entry *dst)
{
struct net_device *odev = dst->dev;
if ((dst->ops->protocol != __constant_htons(ETH_P_IP))
|| (odev->type != ARPHRD_ETHER)
|| (odev->accept_fastpath == NULL)) {
return -1;
}
return 0;
}
#endif
/* try_fastroute() -- Checks the fastroute cache to see if a given packet
* can be routed immediately to another device. If it can, we send it.
* If we used a fastroute, we return 1. Otherwise, we return 0.
* Returns 0 if CONFIG_NET_FASTROUTE is not on
*/
static inline int try_fastroute(struct sk_buff *skb, struct net_device *dev, int length)
{
#ifdef CONFIG_NET_FASTROUTE
struct ethhdr *eth;
struct iphdr *iph;
unsigned int hash;
struct rtable *rt;
struct net_device *odev;
struct gfar_private *priv = netdev_priv(dev);
unsigned int CPU_ID = smp_processor_id();
eth = (struct ethhdr *) (skb->data);
/* Only route ethernet IP packets */
if (eth->h_proto == __constant_htons(ETH_P_IP)) {
iph = (struct iphdr *) (skb->data + ETH_HLEN);
/* Generate the hash value */
hash = ((*(u8 *) &iph->daddr) ^ (*(u8 *) & iph->saddr)) & NETDEV_FASTROUTE_HMASK;
rt = (struct rtable *) (dev->fastpath[hash]);
if (rt != NULL
&& ((*(u32 *) &iph->daddr) == (*(u32 *) &rt->key.dst))
&& ((*(u32 *) &iph->saddr) == (*(u32 *) &rt->key.src))
&& !(rt->u.dst.obsolete)) {
odev = rt->u.dst.dev;
netdev_rx_stat[CPU_ID].fastroute_hit++;
/* Make sure the packet is:
* 1) IPv4
* 2) without any options (header length of 5)
* 3) Not a multicast packet
* 4) going to a valid destination
* 5) Not out of time-to-live
*/
if (iph->version == 4
&& iph->ihl == 5
&& (!(eth->h_dest[0] & 0x01))
&& neigh_is_valid(rt->u.dst.neighbour)
&& iph->ttl > 1) {
/* Fast Route Path: Taken if the outgoing device is ready to transmit the packet now */
if ((!netif_queue_stopped(odev))
&& (!spin_is_locked(odev->xmit_lock))
&& (skb->len <= (odev->mtu + ETH_HLEN + 2 + 4))) {
skb->pkt_type = PACKET_FASTROUTE;
skb->protocol = __constant_htons(ETH_P_IP);
ip_decrease_ttl(iph);
memcpy(eth->h_source, odev->dev_addr, MAC_ADDR_LEN);
memcpy(eth->h_dest, rt->u.dst.neighbour->ha, MAC_ADDR_LEN);
skb->dev = odev;
/* Prep the skb for the packet */
skb_put(skb, length);
if (odev->hard_start_xmit(skb, odev) != 0) {
panic("%s: FastRoute path corrupted", dev->name);
}
netdev_rx_stat[CPU_ID].fastroute_success++;
}
/* Semi Fast Route Path: Mark the packet as needing fast routing, but let the
* stack handle getting it to the device */
else {
skb->pkt_type = PACKET_FASTROUTE;
skb->nh.raw = skb->data + ETH_HLEN;
skb->protocol = __constant_htons(ETH_P_IP);
netdev_rx_stat[CPU_ID].fastroute_defer++;
/* Prep the skb for the packet */
skb_put(skb, length);
if(RECEIVE(skb) == NET_RX_DROP) {
priv->extra_stats.kernel_dropped++;
}
}
return 1;
}
}
}
#endif /* CONFIG_NET_FASTROUTE */
return 0;
}
static int gfar_change_mtu(struct net_device *dev, int new_mtu)
{
int tempsize, tempval;
struct gfar_private *priv = netdev_priv(dev);
int oldsize = priv->rx_buffer_size;
int frame_size = new_mtu + 18;
if ((frame_size < 64) || (frame_size > JUMBO_FRAME_SIZE)) {
printk(KERN_ERR "%s: Invalid MTU setting\n", dev->name);
return -EINVAL;
}
tempsize =
(frame_size & ~(INCREMENTAL_BUFFER_SIZE - 1)) +
INCREMENTAL_BUFFER_SIZE;
/* Only stop and start the controller if it isn't already
* stopped */
if ((oldsize != tempsize) && (dev->flags & IFF_UP))
stop_gfar(dev);
priv->rx_buffer_size = tempsize;
dev->mtu = new_mtu;
gfar_write(&priv->regs->mrblr, priv->rx_buffer_size);
gfar_write(&priv->regs->maxfrm, priv->rx_buffer_size);
/* If the mtu is larger than the max size for standard
* ethernet frames (ie, a jumbo frame), then set maccfg2
* to allow huge frames, and to check the length */
tempval = gfar_read(&priv->regs->maccfg2);
if (priv->rx_buffer_size > DEFAULT_RX_BUFFER_SIZE)
tempval |= (MACCFG2_HUGEFRAME | MACCFG2_LENGTHCHECK);
else
tempval &= ~(MACCFG2_HUGEFRAME | MACCFG2_LENGTHCHECK);
gfar_write(&priv->regs->maccfg2, tempval);
if ((oldsize != tempsize) && (dev->flags & IFF_UP))
startup_gfar(dev);
return 0;
}
/* gfar_timeout gets called when a packet has not been
* transmitted after a set amount of time.
* For now, assume that clearing out all the structures, and
* starting over will fix the problem. */
static void gfar_timeout(struct net_device *dev)
{
struct gfar_private *priv = netdev_priv(dev);
priv->stats.tx_errors++;
if (dev->flags & IFF_UP) {
stop_gfar(dev);
startup_gfar(dev);
}
if (!netif_queue_stopped(dev))
netif_schedule(dev);
}
/* Interrupt Handler for Transmit complete */
static irqreturn_t gfar_transmit(int irq, void *dev_id, struct pt_regs *regs)
{
struct net_device *dev = (struct net_device *) dev_id;
struct gfar_private *priv = netdev_priv(dev);
struct txbd8 *bdp;
/* Clear IEVENT */
gfar_write(&priv->regs->ievent, IEVENT_TX_MASK);
/* Lock priv */
spin_lock(&priv->lock);
bdp = priv->dirty_tx;
while ((bdp->status & TXBD_READY) == 0) {
/* If dirty_tx and cur_tx are the same, then either the */
/* ring is empty or full now (it could only be full in the beginning, */
/* obviously). If it is empty, we are done. */
if ((bdp == priv->cur_tx) && (netif_queue_stopped(dev) == 0))
break;
priv->stats.tx_packets++;
/* Deferred means some collisions occurred during transmit, */
/* but we eventually sent the packet. */
if (bdp->status & TXBD_DEF)
priv->stats.collisions++;
/* Free the sk buffer associated with this TxBD */
dev_kfree_skb_irq(priv->tx_skbuff[priv->skb_dirtytx]);
priv->tx_skbuff[priv->skb_dirtytx] = NULL;
priv->skb_dirtytx =
(priv->skb_dirtytx +
1) & TX_RING_MOD_MASK(priv->tx_ring_size);
/* update bdp to point at next bd in the ring (wrapping if necessary) */
if (bdp->status & TXBD_WRAP)
bdp = priv->tx_bd_base;
else
bdp++;
/* Move dirty_tx to be the next bd */
priv->dirty_tx = bdp;
/* We freed a buffer, so now we can restart transmission */
if (netif_queue_stopped(dev))
netif_wake_queue(dev);
} /* while ((bdp->status & TXBD_READY) == 0) */
/* If we are coalescing the interrupts, reset the timer */
/* Otherwise, clear it */
if (priv->txcoalescing)
gfar_write(&priv->regs->txic,
mk_ic_value(priv->txcount, priv->txtime));
else
gfar_write(&priv->regs->txic, 0);
spin_unlock(&priv->lock);
return IRQ_HANDLED;
}
struct sk_buff * gfar_new_skb(struct net_device *dev, struct rxbd8 *bdp)
{
struct gfar_private *priv = netdev_priv(dev);
struct sk_buff *skb = NULL;
unsigned int timeout = SKB_ALLOC_TIMEOUT;
/* We have to allocate the skb, so keep trying till we succeed */
while ((!skb) && timeout--)
skb = dev_alloc_skb(priv->rx_buffer_size + RXBUF_ALIGNMENT);
if (skb == NULL)
return NULL;
/* We need the data buffer to be aligned properly. We will reserve
* as many bytes as needed to align the data properly
*/
skb_reserve(skb,
RXBUF_ALIGNMENT -
(((unsigned) skb->data) & (RXBUF_ALIGNMENT - 1)));
skb->dev = dev;
bdp->bufPtr = dma_map_single(NULL, skb->data,
priv->rx_buffer_size + RXBUF_ALIGNMENT,
DMA_FROM_DEVICE);
bdp->length = 0;
/* Mark the buffer empty */
bdp->status |= (RXBD_EMPTY | RXBD_INTERRUPT);
return skb;
}
static inline void count_errors(unsigned short status, struct gfar_private *priv)
{
struct net_device_stats *stats = &priv->stats;
struct gfar_extra_stats *estats = &priv->extra_stats;
/* If the packet was truncated, none of the other errors
* matter */
if (status & RXBD_TRUNCATED) {
stats->rx_length_errors++;
estats->rx_trunc++;
return;
}
/* Count the errors, if there were any */
if (status & (RXBD_LARGE | RXBD_SHORT)) {
stats->rx_length_errors++;
if (status & RXBD_LARGE)
estats->rx_large++;
else
estats->rx_short++;
}
if (status & RXBD_NONOCTET) {
stats->rx_frame_errors++;
estats->rx_nonoctet++;
}
if (status & RXBD_CRCERR) {
estats->rx_crcerr++;
stats->rx_crc_errors++;
}
if (status & RXBD_OVERRUN) {
estats->rx_overrun++;
stats->rx_crc_errors++;
}
}
irqreturn_t gfar_receive(int irq, void *dev_id, struct pt_regs *regs)
{
struct net_device *dev = (struct net_device *) dev_id;
struct gfar_private *priv = netdev_priv(dev);
#ifdef CONFIG_GFAR_NAPI
u32 tempval;
#endif
/* Clear IEVENT, so rx interrupt isn't called again
* because of this interrupt */
gfar_write(&priv->regs->ievent, IEVENT_RX_MASK);
/* support NAPI */
#ifdef CONFIG_GFAR_NAPI
if (netif_rx_schedule_prep(dev)) {
tempval = gfar_read(&priv->regs->imask);
tempval &= IMASK_RX_DISABLED;
gfar_write(&priv->regs->imask, tempval);
__netif_rx_schedule(dev);
} else {
#ifdef VERBOSE_GFAR_ERRORS
printk(KERN_DEBUG "%s: receive called twice (%x)[%x]\n",
dev->name, gfar_read(priv->regs->ievent),
gfar_read(priv->regs->imask));
#endif
}
#else
spin_lock(&priv->lock);
gfar_clean_rx_ring(dev);
/* If we are coalescing interrupts, update the timer */
/* Otherwise, clear it */
if (priv->rxcoalescing)
gfar_write(&priv->regs->rxic,
mk_ic_value(priv->rxcount, priv->rxtime));
else
gfar_write(&priv->regs->rxic, 0);
/* Just in case we need to wake the ring param changer */
priv->rxclean = 1;
spin_unlock(&priv->lock);
#endif
return IRQ_HANDLED;
}
/* gfar_process_frame() -- handle one incoming packet if skb
* isn't NULL. Try the fastroute before using the stack */
static int gfar_process_frame(struct net_device *dev, struct sk_buff *skb,
int length)
{
struct gfar_private *priv = netdev_priv(dev);
if (skb == NULL) {
#ifdef BRIEF_GFAR_ERRORS
printk(KERN_WARNING "%s: Missing skb!!.\n",
dev->name);
#endif
priv->stats.rx_dropped++;
priv->extra_stats.rx_skbmissing++;
} else {
if(try_fastroute(skb, dev, length) == 0) {
/* Prep the skb for the packet */
skb_put(skb, length);
/* Tell the skb what kind of packet this is */
skb->protocol = eth_type_trans(skb, dev);
/* Send the packet up the stack */
if (RECEIVE(skb) == NET_RX_DROP) {
priv->extra_stats.kernel_dropped++;
}
}
}
return 0;
}
/* gfar_clean_rx_ring() -- Processes each frame in the rx ring
* until all are gone (or, in the case of NAPI, the budget/quota
* has been reached). Returns the number of frames handled
*/
#ifdef CONFIG_GFAR_NAPI
static int gfar_clean_rx_ring(struct net_device *dev, int rx_work_limit)
#else
static int gfar_clean_rx_ring(struct net_device *dev)
#endif
{
struct rxbd8 *bdp;
struct sk_buff *skb;
u16 pkt_len;
int howmany = 0;
struct gfar_private *priv = netdev_priv(dev);
/* Get the first full descriptor */
bdp = priv->cur_rx;
#ifdef CONFIG_GFAR_NAPI
#define GFAR_RXDONE() ((bdp->status & RXBD_EMPTY) || (--rx_work_limit < 0))
#else
#define GFAR_RXDONE() (bdp->status & RXBD_EMPTY)
#endif
while (!GFAR_RXDONE()) {
skb = priv->rx_skbuff[priv->skb_currx];
if (!(bdp->status &
(RXBD_LARGE | RXBD_SHORT | RXBD_NONOCTET
| RXBD_CRCERR | RXBD_OVERRUN | RXBD_TRUNCATED))) {
/* Increment the number of packets */
priv->stats.rx_packets++;
howmany++;
/* Remove the FCS from the packet length */
pkt_len = bdp->length - 4;
gfar_process_frame(dev, skb, pkt_len);
priv->stats.rx_bytes += pkt_len;
} else {
count_errors(bdp->status, priv);
if (skb)
dev_kfree_skb_any(skb);
priv->rx_skbuff[priv->skb_currx] = NULL;
}
dev->last_rx = jiffies;
/* Clear the status flags for this buffer */
bdp->status &= ~RXBD_STATS;
/* Add another skb for the future */
skb = gfar_new_skb(dev, bdp);
priv->rx_skbuff[priv->skb_currx] = skb;
/* Update to the next pointer */
if (bdp->status & RXBD_WRAP)
bdp = priv->rx_bd_base;
else
bdp++;
/* update to point at the next skb */
priv->skb_currx =
(priv->skb_currx +
1) & RX_RING_MOD_MASK(priv->rx_ring_size);
}
/* Update the current rxbd pointer to be the next one */
priv->cur_rx = bdp;
/* If no packets have arrived since the
* last one we processed, clear the IEVENT RX and
* BSY bits so that another interrupt won't be
* generated when we set IMASK */
if (bdp->status & RXBD_EMPTY)
gfar_write(&priv->regs->ievent, IEVENT_RX_MASK);
return howmany;
}
#ifdef CONFIG_GFAR_NAPI
static int gfar_poll(struct net_device *dev, int *budget)
{
int howmany;
struct gfar_private *priv = netdev_priv(dev);
int rx_work_limit = *budget;
if (rx_work_limit > dev->quota)
rx_work_limit = dev->quota;
spin_lock(&priv->lock);
howmany = gfar_clean_rx_ring(dev, rx_work_limit);
dev->quota -= howmany;
rx_work_limit -= howmany;
*budget -= howmany;
if (rx_work_limit >= 0) {
netif_rx_complete(dev);
/* Clear the halt bit in RSTAT */
gfar_write(&priv->regs->rstat, RSTAT_CLEAR_RHALT);
gfar_write(&priv->regs->imask, IMASK_DEFAULT);
/* If we are coalescing interrupts, update the timer */
/* Otherwise, clear it */
if (priv->rxcoalescing)
gfar_write(&priv->regs->rxic,
mk_ic_value(priv->rxcount, priv->rxtime));
else
gfar_write(&priv->regs->rxic, 0);
/* Signal to the ring size changer that it's safe to go */
priv->rxclean = 1;
}
spin_unlock(priv->lock);
return (rx_work_limit < 0) ? 1 : 0;
}
#endif
/* The interrupt handler for devices with one interrupt */
static irqreturn_t gfar_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
struct net_device *dev = dev_id;
struct gfar_private *priv = netdev_priv(dev);
/* Save ievent for future reference */
u32 events = gfar_read(&priv->regs->ievent);
/* Clear IEVENT */
gfar_write(&priv->regs->ievent, events);
/* Check for reception */
if ((events & IEVENT_RXF0) || (events & IEVENT_RXB0))
gfar_receive(irq, dev_id, regs);
/* Check for transmit completion */
if ((events & IEVENT_TXF) || (events & IEVENT_TXB))
gfar_transmit(irq, dev_id, regs);
/* Update error statistics */
if (events & IEVENT_TXE) {
priv->stats.tx_errors++;
if (events & IEVENT_LC)
priv->stats.tx_window_errors++;
if (events & IEVENT_CRL)
priv->stats.tx_aborted_errors++;
if (events & IEVENT_XFUN) {
#ifdef VERBOSE_GFAR_ERRORS
printk(KERN_WARNING "%s: tx underrun. dropped packet\n",
dev->name);
#endif
priv->stats.tx_dropped++;
priv->extra_stats.tx_underrun++;
/* Reactivate the Tx Queues */
gfar_write(&priv->regs->tstat, TSTAT_CLEAR_THALT);
}
}
if (events & IEVENT_BSY) {
priv->stats.rx_errors++;
priv->extra_stats.rx_bsy++;
gfar_receive(irq, dev_id, regs);
#ifndef CONFIG_GFAR_NAPI
/* Clear the halt bit in RSTAT */
gfar_write(&priv->regs->rstat, RSTAT_CLEAR_RHALT);
#endif
#ifdef VERBOSE_GFAR_ERRORS
printk(KERN_DEBUG "%s: busy error (rhalt: %x)\n", dev->name,
gfar_read(priv->regs->rstat));
#endif
}
if (events & IEVENT_BABR) {
priv->stats.rx_errors++;
priv->extra_stats.rx_babr++;
#ifdef VERBOSE_GFAR_ERRORS
printk(KERN_DEBUG "%s: babbling error\n", dev->name);
#endif
}
if (events & IEVENT_EBERR) {
priv->extra_stats.eberr++;
#ifdef VERBOSE_GFAR_ERRORS
printk(KERN_DEBUG "%s: EBERR\n", dev->name);
#endif
}
if (events & IEVENT_RXC) {
#ifdef VERBOSE_GFAR_ERRORS
printk(KERN_DEBUG "%s: control frame\n", dev->name);
#endif
}
if (events & IEVENT_BABT) {
priv->extra_stats.tx_babt++;
#ifdef VERBOSE_GFAR_ERRORS
printk(KERN_DEBUG "%s: babt error\n", dev->name);
#endif
}
return IRQ_HANDLED;
}
static irqreturn_t phy_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
struct net_device *dev = (struct net_device *) dev_id;
struct gfar_private *priv = netdev_priv(dev);
/* Run the commands which acknowledge the interrupt */
phy_run_commands(dev, priv->phyinfo->ack_int);
/* Schedule the bottom half */
schedule_work(&priv->tq);
return IRQ_HANDLED;
}
/* Scheduled by the phy_interrupt/timer to handle PHY changes */
static void gfar_phy_change(void *data)
{
struct net_device *dev = (struct net_device *) data;
struct gfar_private *priv = netdev_priv(dev);
int timeout = HZ / 1000 + 1;
/* Delay to give the PHY a chance to change the
* register state */
set_current_state(TASK_UNINTERRUPTIBLE);
schedule_timeout(timeout);
/* Run the commands which check the link state */
phy_run_commands(dev, priv->phyinfo->handle_int);
/* React to the change in state */
adjust_link(dev);
}
/* Called every so often on systems that don't interrupt
* the core for PHY changes */
static void gfar_phy_timer(unsigned long data)
{
struct net_device *dev = (struct net_device *) data;
struct gfar_private *priv = netdev_priv(dev);
schedule_work(&priv->tq);
mod_timer(&priv->phy_info_timer, jiffies + 2 * HZ);
}
/* Called every time the controller might need to be made
* aware of new link state. The PHY code conveys this
* information through variables in the priv structure, and this
* function converts those variables into the appropriate
* register values, and can bring down the device if needed.
*/
static void adjust_link(struct net_device *dev)
{
struct gfar_private *priv = netdev_priv(dev);
struct gfar *regs = priv->regs;
u32 tempval;
if (priv->link) {
/* Now we make sure that we can be in full duplex mode.
* If not, we operate in half-duplex mode. */
if (priv->duplexity != priv->olddplx) {
if (!(priv->duplexity)) {
tempval = gfar_read(&regs->maccfg2);
tempval &= ~(MACCFG2_FULL_DUPLEX);
gfar_write(&regs->maccfg2, tempval);
printk(KERN_INFO "%s: Half Duplex\n",
dev->name);
} else {
tempval = gfar_read(&regs->maccfg2);
tempval |= MACCFG2_FULL_DUPLEX;
gfar_write(&regs->maccfg2, tempval);
printk(KERN_INFO "%s: Full Duplex\n",
dev->name);
}
priv->olddplx = priv->duplexity;
}
if (priv->speed != priv->oldspeed) {
switch (priv->speed) {
case 1000:
tempval = gfar_read(&regs->maccfg2);
tempval =
((tempval & ~(MACCFG2_IF)) | MACCFG2_GMII);
gfar_write(&regs->maccfg2, tempval);
break;
case 100:
case 10:
tempval = gfar_read(&regs->maccfg2);
tempval =
((tempval & ~(MACCFG2_IF)) | MACCFG2_MII);
gfar_write(&regs->maccfg2, tempval);
break;
default:
printk(KERN_WARNING
"%s: Ack! Speed (%d) is not 10/100/1000!\n",
dev->name, priv->speed);
break;
}
printk(KERN_INFO "%s: Speed %dBT\n", dev->name,
priv->speed);
priv->oldspeed = priv->speed;
}
if (!priv->oldlink) {
printk(KERN_INFO "%s: Link is up\n", dev->name);
priv->oldlink = 1;
netif_carrier_on(dev);
netif_schedule(dev);
}
} else {
if (priv->oldlink) {
printk(KERN_INFO "%s: Link is down\n", dev->name);
priv->oldlink = 0;
priv->oldspeed = 0;
priv->olddplx = -1;
netif_carrier_off(dev);
}
}
}
/* Update the hash table based on the current list of multicast
* addresses we subscribe to. Also, change the promiscuity of
* the device based on the flags (this function is called
* whenever dev->flags is changed */
static void gfar_set_multi(struct net_device *dev)
{
struct dev_mc_list *mc_ptr;
struct gfar_private *priv = netdev_priv(dev);
struct gfar *regs = priv->regs;
u32 tempval;
if(dev->flags & IFF_PROMISC) {
printk(KERN_INFO "%s: Entering promiscuous mode.\n",
dev->name);
/* Set RCTRL to PROM */
tempval = gfar_read(&regs->rctrl);
tempval |= RCTRL_PROM;
gfar_write(&regs->rctrl, tempval);
} else {
/* Set RCTRL to not PROM */
tempval = gfar_read(&regs->rctrl);
tempval &= ~(RCTRL_PROM);
gfar_write(&regs->rctrl, tempval);
}
if(dev->flags & IFF_ALLMULTI) {
/* Set the hash to rx all multicast frames */
gfar_write(&regs->gaddr0, 0xffffffff);
gfar_write(&regs->gaddr1, 0xffffffff);
gfar_write(&regs->gaddr2, 0xffffffff);
gfar_write(&regs->gaddr3, 0xffffffff);
gfar_write(&regs->gaddr4, 0xffffffff);
gfar_write(&regs->gaddr5, 0xffffffff);
gfar_write(&regs->gaddr6, 0xffffffff);
gfar_write(&regs->gaddr7, 0xffffffff);
} else {
/* zero out the hash */
gfar_write(&regs->gaddr0, 0x0);
gfar_write(&regs->gaddr1, 0x0);
gfar_write(&regs->gaddr2, 0x0);
gfar_write(&regs->gaddr3, 0x0);
gfar_write(&regs->gaddr4, 0x0);
gfar_write(&regs->gaddr5, 0x0);
gfar_write(&regs->gaddr6, 0x0);
gfar_write(&regs->gaddr7, 0x0);
if(dev->mc_count == 0)
return;
/* Parse the list, and set the appropriate bits */
for(mc_ptr = dev->mc_list; mc_ptr; mc_ptr = mc_ptr->next) {
gfar_set_hash_for_addr(dev, mc_ptr->dmi_addr);
}
}
return;
}
/* Set the appropriate hash bit for the given addr */
/* The algorithm works like so:
* 1) Take the Destination Address (ie the multicast address), and
* do a CRC on it (little endian), and reverse the bits of the
* result.
* 2) Use the 8 most significant bits as a hash into a 256-entry
* table. The table is controlled through 8 32-bit registers:
* gaddr0-7. gaddr0's MSB is entry 0, and gaddr7's LSB is
* gaddr7. This means that the 3 most significant bits in the
* hash index which gaddr register to use, and the 5 other bits
* indicate which bit (assuming an IBM numbering scheme, which
* for PowerPC (tm) is usually the case) in the register holds
* the entry. */
static void gfar_set_hash_for_addr(struct net_device *dev, u8 *addr)
{
u32 tempval;
struct gfar_private *priv = netdev_priv(dev);
struct gfar *regs = priv->regs;
u32 *hash = &regs->gaddr0;
u32 result = ether_crc(MAC_ADDR_LEN, addr);
u8 whichreg = ((result >> 29) & 0x7);
u8 whichbit = ((result >> 24) & 0x1f);
u32 value = (1 << (31-whichbit));
tempval = gfar_read(&hash[whichreg]);
tempval |= value;
gfar_write(&hash[whichreg], tempval);
return;
}
/* GFAR error interrupt handler */
static irqreturn_t gfar_error(int irq, void *dev_id, struct pt_regs *regs)
{
struct net_device *dev = dev_id;
struct gfar_private *priv = netdev_priv(dev);
/* Save ievent for future reference */
u32 events = gfar_read(&priv->regs->ievent);
/* Clear IEVENT */
gfar_write(&priv->regs->ievent, IEVENT_ERR_MASK);
/* Hmm... */
#if defined (BRIEF_GFAR_ERRORS) || defined (VERBOSE_GFAR_ERRORS)
printk(KERN_DEBUG "%s: error interrupt (ievent=0x%08x imask=0x%08x)\n",
dev->name, events, gfar_read(priv->regs->imask));
#endif
/* Update the error counters */
if (events & IEVENT_TXE) {
priv->stats.tx_errors++;
if (events & IEVENT_LC)
priv->stats.tx_window_errors++;
if (events & IEVENT_CRL)
priv->stats.tx_aborted_errors++;
if (events & IEVENT_XFUN) {
#ifdef VERBOSE_GFAR_ERRORS
printk(KERN_DEBUG "%s: underrun. packet dropped.\n",
dev->name);
#endif
priv->stats.tx_dropped++;
priv->extra_stats.tx_underrun++;
/* Reactivate the Tx Queues */
gfar_write(&priv->regs->tstat, TSTAT_CLEAR_THALT);
}
#ifdef VERBOSE_GFAR_ERRORS
printk(KERN_DEBUG "%s: Transmit Error\n", dev->name);
#endif
}
if (events & IEVENT_BSY) {
priv->stats.rx_errors++;
priv->extra_stats.rx_bsy++;
gfar_receive(irq, dev_id, regs);
#ifndef CONFIG_GFAR_NAPI
/* Clear the halt bit in RSTAT */
gfar_write(&priv->regs->rstat, RSTAT_CLEAR_RHALT);
#endif
#ifdef VERBOSE_GFAR_ERRORS
printk(KERN_DEBUG "%s: busy error (rhalt: %x)\n", dev->name,
gfar_read(priv->regs->rstat));
#endif
}
if (events & IEVENT_BABR) {
priv->stats.rx_errors++;
priv->extra_stats.rx_babr++;
#ifdef VERBOSE_GFAR_ERRORS
printk(KERN_DEBUG "%s: babbling error\n", dev->name);
#endif
}
if (events & IEVENT_EBERR) {
priv->extra_stats.eberr++;
#ifdef VERBOSE_GFAR_ERRORS
printk(KERN_DEBUG "%s: EBERR\n", dev->name);
#endif
}
if (events & IEVENT_RXC)
#ifdef VERBOSE_GFAR_ERRORS
printk(KERN_DEBUG "%s: control frame\n", dev->name);
#endif
if (events & IEVENT_BABT) {
priv->extra_stats.tx_babt++;
#ifdef VERBOSE_GFAR_ERRORS
printk(KERN_DEBUG "%s: babt error\n", dev->name);
#endif
}
return IRQ_HANDLED;
}
/* Structure for a device driver */
static struct ocp_device_id gfar_ids[] = {
{.vendor = OCP_ANY_ID,.function = OCP_FUNC_GFAR},
{.vendor = OCP_VENDOR_INVALID}
};
static struct ocp_driver gfar_driver = {
.name = "gianfar",
.id_table = gfar_ids,
.probe = gfar_probe,
.remove = gfar_remove,
};
static int __init gfar_init(void)
{
int rc;
rc = ocp_register_driver(&gfar_driver);
#if LINUX_VERSION_CODE > KERNEL_VERSION(2,5,41)
if (rc != 0) {
#else
if (rc == 0) {
#endif
ocp_unregister_driver(&gfar_driver);
return -ENODEV;
}
return 0;
}
static void __exit gfar_exit(void)
{
ocp_unregister_driver(&gfar_driver);
}
module_init(gfar_init);
module_exit(gfar_exit);
drivers/net/gianfar.h 0 → 100644
View file @ 3b2f1919
/*
* drivers/net/gianfar.h
*
* Gianfar Ethernet Driver
* Driver for FEC on MPC8540 and TSEC on MPC8540/MPC8560
* Based on 8260_io/fcc_enet.c
*
* Author: Andy Fleming
* Maintainer: Kumar Gala (kumar.gala@freescale.com)
*
* Copyright 2004 Freescale Semiconductor, Inc
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* Still left to do:
* -Add support for module parameters
*/
#ifndef __GIANFAR_H
#define __GIANFAR_H
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/interrupt.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/mm.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/uaccess.h>
#include <linux/module.h>
#include <linux/version.h>
#include <linux/crc32.h>
#if LINUX_VERSION_CODE > KERNEL_VERSION(2,5,41)
#include <linux/workqueue.h>
#else
#include <linux/tqueue.h>
#define work_struct tq_struct
#define schedule_work schedule_task
#endif
#include <linux/ethtool.h>
#include <linux/netdevice.h>
#include <asm/ocp.h>
#include "gianfar_phy.h"
/* The maximum number of packets to be handled in one call of gfar_poll */
#define GFAR_DEV_WEIGHT 64
/* Number of bytes to align the rx bufs to */
#define RXBUF_ALIGNMENT 64
/* The number of bytes which composes a unit for the purpose of
* allocating data buffers. ie-for any given MTU, the data buffer
* will be the next highest multiple of 512 bytes. */
#define INCREMENTAL_BUFFER_SIZE 512
#define MAC_ADDR_LEN 6
extern char gfar_driver_name[];
extern char gfar_driver_version[];
/* These need to be powers of 2 for this driver */
#ifdef CONFIG_GFAR_NAPI
#define DEFAULT_TX_RING_SIZE 256
#define DEFAULT_RX_RING_SIZE 256
#else
#define DEFAULT_TX_RING_SIZE 64
#define DEFAULT_RX_RING_SIZE 64
#endif
#define GFAR_RX_MAX_RING_SIZE 256
#define GFAR_TX_MAX_RING_SIZE 256
#define DEFAULT_RX_BUFFER_SIZE 1536
#define TX_RING_MOD_MASK(size) (size-1)
#define RX_RING_MOD_MASK(size) (size-1)
#define JUMBO_BUFFER_SIZE 9728
#define JUMBO_FRAME_SIZE 9600
/* Latency of interface clock in nanoseconds */
/* Interface clock latency , in this case, means the
* time described by a value of 1 in the interrupt
* coalescing registers' time fields. Since those fields
* refer to the time it takes for 64 clocks to pass, the
* latencies are as such:
* GBIT = 125MHz => 8ns/clock => 8*64 ns / tick
* 100 = 25 MHz => 40ns/clock => 40*64 ns / tick
* 10 = 2.5 MHz => 400ns/clock => 400*64 ns / tick
*/
#define GFAR_GBIT_TIME 512
#define GFAR_100_TIME 2560
#define GFAR_10_TIME 25600
#define DEFAULT_TXCOUNT 16
#define DEFAULT_TXTIME 32768
#define DEFAULT_RXCOUNT 16
#define DEFAULT_RXTIME 32768
#define TBIPA_VALUE 0x1f
#define MIIMCFG_INIT_VALUE 0x00000007
#define MIIMCFG_RESET 0x80000000
#define MIIMIND_BUSY 0x00000001
/* MAC register bits */
#define MACCFG1_SOFT_RESET 0x80000000
#define MACCFG1_RESET_RX_MC 0x00080000
#define MACCFG1_RESET_TX_MC 0x00040000
#define MACCFG1_RESET_RX_FUN 0x00020000
#define MACCFG1_RESET_TX_FUN 0x00010000
#define MACCFG1_LOOPBACK 0x00000100
#define MACCFG1_RX_FLOW 0x00000020
#define MACCFG1_TX_FLOW 0x00000010
#define MACCFG1_SYNCD_RX_EN 0x00000008
#define MACCFG1_RX_EN 0x00000004
#define MACCFG1_SYNCD_TX_EN 0x00000002
#define MACCFG1_TX_EN 0x00000001
#define MACCFG2_INIT_SETTINGS 0x00007205
#define MACCFG2_FULL_DUPLEX 0x00000001
#define MACCFG2_IF 0x00000300
#define MACCFG2_MII 0x00000100
#define MACCFG2_GMII 0x00000200
#define MACCFG2_HUGEFRAME 0x00000020
#define MACCFG2_LENGTHCHECK 0x00000010
#define ECNTRL_INIT_SETTINGS 0x00001000
#define ECNTRL_TBI_MODE 0x00000020
#define MRBLR_INIT_SETTINGS DEFAULT_RX_BUFFER_SIZE
#define MINFLR_INIT_SETTINGS 0x00000040
/* Init to do tx snooping for buffers and descriptors */
#define DMACTRL_INIT_SETTINGS 0x000000c3
#define DMACTRL_GRS 0x00000010
#define DMACTRL_GTS 0x00000008
#define TSTAT_CLEAR_THALT 0x80000000
/* Interrupt coalescing macros */
#define IC_ICEN 0x80000000
#define IC_ICFT_MASK 0x1fe00000
#define IC_ICFT_SHIFT 21
#define mk_ic_icft(x) \
(((unsigned int)x << IC_ICFT_SHIFT)&IC_ICFT_MASK)
#define IC_ICTT_MASK 0x0000ffff
#define mk_ic_ictt(x) (x&IC_ICTT_MASK)
#define mk_ic_value(count, time) (IC_ICEN | \
mk_ic_icft(count) | \
mk_ic_ictt(time))
#define RCTRL_PROM 0x00000008
#define RSTAT_CLEAR_RHALT 0x00800000
#define IEVENT_INIT_CLEAR 0xffffffff
#define IEVENT_BABR 0x80000000
#define IEVENT_RXC 0x40000000
#define IEVENT_BSY 0x20000000
#define IEVENT_EBERR 0x10000000
#define IEVENT_MSRO 0x04000000
#define IEVENT_GTSC 0x02000000
#define IEVENT_BABT 0x01000000
#define IEVENT_TXC 0x00800000
#define IEVENT_TXE 0x00400000
#define IEVENT_TXB 0x00200000
#define IEVENT_TXF 0x00100000
#define IEVENT_LC 0x00040000
#define IEVENT_CRL 0x00020000
#define IEVENT_XFUN 0x00010000
#define IEVENT_RXB0 0x00008000
#define IEVENT_GRSC 0x00000100
#define IEVENT_RXF0 0x00000080
#define IEVENT_RX_MASK (IEVENT_RXB0 | IEVENT_RXF0)
#define IEVENT_TX_MASK (IEVENT_TXB | IEVENT_TXF)
#define IEVENT_ERR_MASK \
(IEVENT_RXC | IEVENT_BSY | IEVENT_EBERR | IEVENT_MSRO | \
IEVENT_BABT | IEVENT_TXC | IEVENT_TXE | IEVENT_LC \
| IEVENT_CRL | IEVENT_XFUN)
#define IMASK_INIT_CLEAR 0x00000000
#define IMASK_BABR 0x80000000
#define IMASK_RXC 0x40000000
#define IMASK_BSY 0x20000000
#define IMASK_EBERR 0x10000000
#define IMASK_MSRO 0x04000000
#define IMASK_GRSC 0x02000000
#define IMASK_BABT 0x01000000
#define IMASK_TXC 0x00800000
#define IMASK_TXEEN 0x00400000
#define IMASK_TXBEN 0x00200000
#define IMASK_TXFEN 0x00100000
#define IMASK_LC 0x00040000
#define IMASK_CRL 0x00020000
#define IMASK_XFUN 0x00010000
#define IMASK_RXB0 0x00008000
#define IMASK_GTSC 0x00000100
#define IMASK_RXFEN0 0x00000080
#define IMASK_RX_DISABLED ~(IMASK_RXFEN0 | IMASK_BSY)
#define IMASK_DEFAULT (IMASK_TXEEN | IMASK_TXFEN | IMASK_TXBEN | \
IMASK_RXFEN0 | IMASK_BSY | IMASK_EBERR | IMASK_BABR | \
IMASK_XFUN | IMASK_RXC | IMASK_BABT)
/* Attribute fields */
/* This enables rx snooping for buffers and descriptors */
#ifdef CONFIG_GFAR_BDSTASH
#define ATTR_BDSTASH 0x00000800
#else
#define ATTR_BDSTASH 0x00000000
#endif
#ifdef CONFIG_GFAR_BUFSTASH
#define ATTR_BUFSTASH 0x00004000
#define STASH_LENGTH 64
#else
#define ATTR_BUFSTASH 0x00000000
#endif
#define ATTR_SNOOPING 0x000000c0
#define ATTR_INIT_SETTINGS (ATTR_SNOOPING \
| ATTR_BDSTASH | ATTR_BUFSTASH)
#define ATTRELI_INIT_SETTINGS 0x0
/* TxBD status field bits */
#define TXBD_READY 0x8000
#define TXBD_PADCRC 0x4000
#define TXBD_WRAP 0x2000
#define TXBD_INTERRUPT 0x1000
#define TXBD_LAST 0x0800
#define TXBD_CRC 0x0400
#define TXBD_DEF 0x0200
#define TXBD_HUGEFRAME 0x0080
#define TXBD_LATECOLLISION 0x0080
#define TXBD_RETRYLIMIT 0x0040
#define TXBD_RETRYCOUNTMASK 0x003c
#define TXBD_UNDERRUN 0x0002
/* RxBD status field bits */
#define RXBD_EMPTY 0x8000
#define RXBD_RO1 0x4000
#define RXBD_WRAP 0x2000
#define RXBD_INTERRUPT 0x1000
#define RXBD_LAST 0x0800
#define RXBD_FIRST 0x0400
#define RXBD_MISS 0x0100
#define RXBD_BROADCAST 0x0080
#define RXBD_MULTICAST 0x0040
#define RXBD_LARGE 0x0020
#define RXBD_NONOCTET 0x0010
#define RXBD_SHORT 0x0008
#define RXBD_CRCERR 0x0004
#define RXBD_OVERRUN 0x0002
#define RXBD_TRUNCATED 0x0001
#define RXBD_STATS 0x01ff
struct txbd8
{
u16 status; /* Status Fields */
u16 length; /* Buffer length */
u32 bufPtr; /* Buffer Pointer */
};
struct rxbd8
{
u16 status; /* Status Fields */
u16 length; /* Buffer Length */
u32 bufPtr; /* Buffer Pointer */
};
struct rmon_mib
{
u32 tr64; /* 0x.680 - Transmit and Receive 64-byte Frame Counter */
u32 tr127; /* 0x.684 - Transmit and Receive 65-127 byte Frame Counter */
u32 tr255; /* 0x.688 - Transmit and Receive 128-255 byte Frame Counter */
u32 tr511; /* 0x.68c - Transmit and Receive 256-511 byte Frame Counter */
u32 tr1k; /* 0x.690 - Transmit and Receive 512-1023 byte Frame Counter */
u32 trmax; /* 0x.694 - Transmit and Receive 1024-1518 byte Frame Counter */
u32 trmgv; /* 0x.698 - Transmit and Receive 1519-1522 byte Good VLAN Frame */
u32 rbyt; /* 0x.69c - Receive Byte Counter */
u32 rpkt; /* 0x.6a0 - Receive Packet Counter */
u32 rfcs; /* 0x.6a4 - Receive FCS Error Counter */
u32 rmca; /* 0x.6a8 - Receive Multicast Packet Counter */
u32 rbca; /* 0x.6ac - Receive Broadcast Packet Counter */
u32 rxcf; /* 0x.6b0 - Receive Control Frame Packet Counter */
u32 rxpf; /* 0x.6b4 - Receive Pause Frame Packet Counter */
u32 rxuo; /* 0x.6b8 - Receive Unknown OP Code Counter */
u32 raln; /* 0x.6bc - Receive Alignment Error Counter */
u32 rflr; /* 0x.6c0 - Receive Frame Length Error Counter */
u32 rcde; /* 0x.6c4 - Receive Code Error Counter */
u32 rcse; /* 0x.6c8 - Receive Carrier Sense Error Counter */
u32 rund; /* 0x.6cc - Receive Undersize Packet Counter */
u32 rovr; /* 0x.6d0 - Receive Oversize Packet Counter */
u32 rfrg; /* 0x.6d4 - Receive Fragments Counter */
u32 rjbr; /* 0x.6d8 - Receive Jabber Counter */
u32 rdrp; /* 0x.6dc - Receive Drop Counter */
u32 tbyt; /* 0x.6e0 - Transmit Byte Counter Counter */
u32 tpkt; /* 0x.6e4 - Transmit Packet Counter */
u32 tmca; /* 0x.6e8 - Transmit Multicast Packet Counter */
u32 tbca; /* 0x.6ec - Transmit Broadcast Packet Counter */
u32 txpf; /* 0x.6f0 - Transmit Pause Control Frame Counter */
u32 tdfr; /* 0x.6f4 - Transmit Deferral Packet Counter */
u32 tedf; /* 0x.6f8 - Transmit Excessive Deferral Packet Counter */
u32 tscl; /* 0x.6fc - Transmit Single Collision Packet Counter */
u32 tmcl; /* 0x.700 - Transmit Multiple Collision Packet Counter */
u32 tlcl; /* 0x.704 - Transmit Late Collision Packet Counter */
u32 txcl; /* 0x.708 - Transmit Excessive Collision Packet Counter */
u32 tncl; /* 0x.70c - Transmit Total Collision Counter */
u8 res1[4];
u32 tdrp; /* 0x.714 - Transmit Drop Frame Counter */
u32 tjbr; /* 0x.718 - Transmit Jabber Frame Counter */
u32 tfcs; /* 0x.71c - Transmit FCS Error Counter */
u32 txcf; /* 0x.720 - Transmit Control Frame Counter */
u32 tovr; /* 0x.724 - Transmit Oversize Frame Counter */
u32 tund; /* 0x.728 - Transmit Undersize Frame Counter */
u32 tfrg; /* 0x.72c - Transmit Fragments Frame Counter */
u32 car1; /* 0x.730 - Carry Register One */
u32 car2; /* 0x.734 - Carry Register Two */
u32 cam1; /* 0x.738 - Carry Mask Register One */
u32 cam2; /* 0x.73c - Carry Mask Register Two */
};
struct gfar_extra_stats {
u64 kernel_dropped;
u64 rx_large;
u64 rx_short;
u64 rx_nonoctet;
u64 rx_crcerr;
u64 rx_overrun;
u64 rx_bsy;
u64 rx_babr;
u64 rx_trunc;
u64 eberr;
u64 tx_babt;
u64 tx_underrun;
u64 rx_skbmissing;
u64 tx_timeout;
};
#define GFAR_RMON_LEN ((sizeof(struct rmon_mib) - 16)/sizeof(u32))
#define GFAR_EXTRA_STATS_LEN (sizeof(struct gfar_extra_stats)/sizeof(u64))
/* Number of stats in the stats structure (ignore car and cam regs)*/
#define GFAR_STATS_LEN (GFAR_RMON_LEN + GFAR_EXTRA_STATS_LEN)
#define GFAR_INFOSTR_LEN 32
struct gfar_stats {
u64 extra[GFAR_EXTRA_STATS_LEN];
u64 rmon[GFAR_RMON_LEN];
};
struct gfar {
u8 res1[16];
u32 ievent; /* 0x.010 - Interrupt Event Register */
u32 imask; /* 0x.014 - Interrupt Mask Register */
u32 edis; /* 0x.018 - Error Disabled Register */
u8 res2[4];
u32 ecntrl; /* 0x.020 - Ethernet Control Register */
u32 minflr; /* 0x.024 - Minimum Frame Length Register */
u32 ptv; /* 0x.028 - Pause Time Value Register */
u32 dmactrl; /* 0x.02c - DMA Control Register */
u32 tbipa; /* 0x.030 - TBI PHY Address Register */
u8 res3[88];
u32 fifo_tx_thr; /* 0x.08c - FIFO transmit threshold register */
u8 res4[8];
u32 fifo_tx_starve; /* 0x.098 - FIFO transmit starve register */
u32 fifo_tx_starve_shutoff; /* 0x.09c - FIFO transmit starve shutoff register */
u8 res5[96];
u32 tctrl; /* 0x.100 - Transmit Control Register */
u32 tstat; /* 0x.104 - Transmit Status Register */
u8 res6[4];
u32 tbdlen; /* 0x.10c - Transmit Buffer Descriptor Data Length Register */
u32 txic; /* 0x.110 - Transmit Interrupt Coalescing Configuration Register */
u8 res7[16];
u32 ctbptr; /* 0x.124 - Current Transmit Buffer Descriptor Pointer Register */
u8 res8[92];
u32 tbptr; /* 0x.184 - Transmit Buffer Descriptor Pointer Low Register */
u8 res9[124];
u32 tbase; /* 0x.204 - Transmit Descriptor Base Address Register */
u8 res10[168];
u32 ostbd; /* 0x.2b0 - Out-of-Sequence Transmit Buffer Descriptor Register */
u32 ostbdp; /* 0x.2b4 - Out-of-Sequence Transmit Data Buffer Pointer Register */
u8 res11[72];
u32 rctrl; /* 0x.300 - Receive Control Register */
u32 rstat; /* 0x.304 - Receive Status Register */
u8 res12[4];
u32 rbdlen; /* 0x.30c - RxBD Data Length Register */
u32 rxic; /* 0x.310 - Receive Interrupt Coalescing Configuration Register */
u8 res13[16];
u32 crbptr; /* 0x.324 - Current Receive Buffer Descriptor Pointer */
u8 res14[24];
u32 mrblr; /* 0x.340 - Maximum Receive Buffer Length Register */
u8 res15[64];
u32 rbptr; /* 0x.384 - Receive Buffer Descriptor Pointer */
u8 res16[124];
u32 rbase; /* 0x.404 - Receive Descriptor Base Address */
u8 res17[248];
u32 maccfg1; /* 0x.500 - MAC Configuration 1 Register */
u32 maccfg2; /* 0x.504 - MAC Configuration 2 Register */
u32 ipgifg; /* 0x.508 - Inter Packet Gap/Inter Frame Gap Register */
u32 hafdup; /* 0x.50c - Half Duplex Register */
u32 maxfrm; /* 0x.510 - Maximum Frame Length Register */
u8 res18[12];
u32 miimcfg; /* 0x.520 - MII Management Configuration Register */
u32 miimcom; /* 0x.524 - MII Management Command Register */
u32 miimadd; /* 0x.528 - MII Management Address Register */
u32 miimcon; /* 0x.52c - MII Management Control Register */
u32 miimstat; /* 0x.530 - MII Management Status Register */
u32 miimind; /* 0x.534 - MII Management Indicator Register */
u8 res19[4];
u32 ifstat; /* 0x.53c - Interface Status Register */
u32 macstnaddr1; /* 0x.540 - Station Address Part 1 Register */
u32 macstnaddr2; /* 0x.544 - Station Address Part 2 Register */
u8 res20[312];
struct rmon_mib rmon;
u8 res21[192];
u32 iaddr0; /* 0x.800 - Indivdual address register 0 */
u32 iaddr1; /* 0x.804 - Indivdual address register 1 */
u32 iaddr2; /* 0x.808 - Indivdual address register 2 */
u32 iaddr3; /* 0x.80c - Indivdual address register 3 */
u32 iaddr4; /* 0x.810 - Indivdual address register 4 */
u32 iaddr5; /* 0x.814 - Indivdual address register 5 */
u32 iaddr6; /* 0x.818 - Indivdual address register 6 */
u32 iaddr7; /* 0x.81c - Indivdual address register 7 */
u8 res22[96];
u32 gaddr0; /* 0x.880 - Global address register 0 */
u32 gaddr1; /* 0x.884 - Global address register 1 */
u32 gaddr2; /* 0x.888 - Global address register 2 */
u32 gaddr3; /* 0x.88c - Global address register 3 */
u32 gaddr4; /* 0x.890 - Global address register 4 */
u32 gaddr5; /* 0x.894 - Global address register 5 */
u32 gaddr6; /* 0x.898 - Global address register 6 */
u32 gaddr7; /* 0x.89c - Global address register 7 */
u8 res23[856];
u32 attr; /* 0x.bf8 - Attributes Register */
u32 attreli; /* 0x.bfc - Attributes Extract Length and Extract Index Register */
u8 res24[1024];
};
/* Struct stolen almost completely (and shamelessly) from the FCC enet source
* (Ok, that's not so true anymore, but there is a family resemblence)
* The GFAR buffer descriptors track the ring buffers. The rx_bd_base
* and tx_bd_base always point to the currently available buffer.
* The dirty_tx tracks the current buffer that is being sent by the
* controller. The cur_tx and dirty_tx are equal under both completely
* empty and completely full conditions. The empty/ready indicator in
* the buffer descriptor determines the actual condition.
*/
struct gfar_private
{
/* pointers to arrays of skbuffs for tx and rx */
struct sk_buff ** tx_skbuff;
struct sk_buff ** rx_skbuff;
/* indices pointing to the next free sbk in skb arrays */
u16 skb_curtx;
u16 skb_currx;
/* index of the first skb which hasn't been transmitted
* yet. */
u16 skb_dirtytx;
/* Configuration info for the coalescing features */
unsigned char txcoalescing;
unsigned short txcount;
unsigned short txtime;
unsigned char rxcoalescing;
unsigned short rxcount;
unsigned short rxtime;
/* GFAR addresses */
struct rxbd8 *rx_bd_base; /* Base addresses of Rx and Tx Buffers */
struct txbd8 *tx_bd_base;
struct rxbd8 *cur_rx; /* Next free rx ring entry */
struct txbd8 *cur_tx; /* Next free ring entry */
struct txbd8 *dirty_tx; /* The Ring entry to be freed. */
struct gfar *regs; /* Pointer to the GFAR memory mapped Registers */
struct phy_info *phyinfo;
struct gfar *phyregs;
struct work_struct tq;
struct timer_list phy_info_timer;
struct net_device_stats stats; /* linux network statistics */
struct gfar_extra_stats extra_stats;
spinlock_t lock;
unsigned int rx_buffer_size;
unsigned int rx_stash_size;
unsigned int tx_ring_size;
unsigned int rx_ring_size;
wait_queue_head_t rxcleanupq;
unsigned int rxclean;
int link; /* current link state */
int oldlink;
int duplexity; /* Indicates negotiated duplex state */
int olddplx;
int speed; /* Indicates negotiated speed */
int oldspeed;
/* Info structure initialized by board setup code */
struct ocp_gfar_data *einfo;
};
extern inline u32 gfar_read(volatile unsigned *addr)
{
u32 val;
val = in_be32(addr);
return val;
}
extern inline void gfar_write(volatile unsigned *addr, u32 val)
{
out_be32(addr, val);
}
#endif /* __GIANFAR_H */
drivers/net/gianfar_ethtool.c 0 → 100644
View file @ 3b2f1919
/*
* drivers/net/gianfar_ethtool.c
*
* Gianfar Ethernet Driver
* Ethtool support for Gianfar Enet
* Based on e1000 ethtool support
*
* Author: Andy Fleming
* Maintainer: Kumar Gala (kumar.gala@freescale.com)
*
* Copyright 2004 Freescale Semiconductor, Inc
*
* This software may be used and distributed according to
* the terms of the GNU Public License, Version 2, incorporated herein
* by reference.
*/
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/interrupt.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/mm.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/uaccess.h>
#include <linux/module.h>
#include <linux/version.h>
#include <linux/crc32.h>
#include <asm/types.h>
#include <asm/uaccess.h>
#include <linux/ethtool.h>
#include "gianfar.h"
#define is_power_of_2(x) ((x) != 0 && (((x) & ((x) - 1)) == 0))
extern int startup_gfar(struct net_device *dev);
extern void stop_gfar(struct net_device *dev);
extern void gfar_receive(int irq, void *dev_id, struct pt_regs *regs);
void gfar_fill_stats(struct net_device *dev, struct ethtool_stats *dummy,
u64 * buf);
void gfar_gstrings(struct net_device *dev, u32 stringset, u8 * buf);
int gfar_gcoalesce(struct net_device *dev, struct ethtool_coalesce *cvals);
int gfar_scoalesce(struct net_device *dev, struct ethtool_coalesce *cvals);
void gfar_gringparam(struct net_device *dev, struct ethtool_ringparam *rvals);
int gfar_sringparam(struct net_device *dev, struct ethtool_ringparam *rvals);
void gfar_gdrvinfo(struct net_device *dev, struct ethtool_drvinfo *drvinfo);
static char stat_gstrings[][ETH_GSTRING_LEN] = {
"RX Dropped by Kernel",
"RX Large Frame Errors",
"RX Short Frame Errors",
"RX Non-Octet Errors",
"RX CRC Errors",
"RX Overrun Errors",
"RX Busy Errors",
"RX Babbling Errors",
"RX Truncated Frames",
"Ethernet Bus Error",
"TX Babbling Errors",
"TX Underrun Errors",
"RX SKB Missing Errors",
"TX Timeout Errors",
"tx&rx 64B frames",
"tx&rx 65-127B frames",
"tx&rx 128-255B frames",
"tx&rx 256-511B frames",
"tx&rx 512-1023B frames",
"tx&rx 1024-1518B frames",
"tx&rx 1519-1522B Good VLAN",
"RX bytes",
"RX Packets",
"RX FCS Errors",
"Receive Multicast Packet",
"Receive Broadcast Packet",
"RX Control Frame Packets",
"RX Pause Frame Packets",
"RX Unknown OP Code",
"RX Alignment Error",
"RX Frame Length Error",
"RX Code Error",
"RX Carrier Sense Error",
"RX Undersize Packets",
"RX Oversize Packets",
"RX Fragmented Frames",
"RX Jabber Frames",
"RX Dropped Frames",
"TX Byte Counter",
"TX Packets",
"TX Multicast Packets",
"TX Broadcast Packets",
"TX Pause Control Frames",
"TX Deferral Packets",
"TX Excessive Deferral Packets",
"TX Single Collision Packets",
"TX Multiple Collision Packets",
"TX Late Collision Packets",
"TX Excessive Collision Packets",
"TX Total Collision",
"RESERVED",
"TX Dropped Frames",
"TX Jabber Frames",
"TX FCS Errors",
"TX Control Frames",
"TX Oversize Frames",
"TX Undersize Frames",
"TX Fragmented Frames",
};
/* Fill in an array of 64-bit statistics from various sources.
* This array will be appended to the end of the ethtool_stats
* structure, and returned to user space
*/
void gfar_fill_stats(struct net_device *dev, struct ethtool_stats *dummy, u64 * buf)
{
int i;
struct gfar_private *priv = (struct gfar_private *) dev->priv;
u32 *rmon = (u32 *) & priv->regs->rmon;
u64 *extra = (u64 *) & priv->extra_stats;
struct gfar_stats *stats = (struct gfar_stats *) buf;
for (i = 0; i < GFAR_RMON_LEN; i++) {
stats->rmon[i] = (u64) (rmon[i]);
}
for (i = 0; i < GFAR_EXTRA_STATS_LEN; i++) {
stats->extra[i] = extra[i];
}
}
/* Returns the number of stats (and their corresponding strings) */
int gfar_stats_count(struct net_device *dev)
{
return GFAR_STATS_LEN;
}
void gfar_gstrings_normon(struct net_device *dev, u32 stringset, u8 * buf)
{
memcpy(buf, stat_gstrings, GFAR_EXTRA_STATS_LEN * ETH_GSTRING_LEN);
}
void gfar_fill_stats_normon(struct net_device *dev,
struct ethtool_stats *dummy, u64 * buf)
{
int i;
struct gfar_private *priv = (struct gfar_private *) dev->priv;
u64 *extra = (u64 *) & priv->extra_stats;
for (i = 0; i < GFAR_EXTRA_STATS_LEN; i++) {
buf[i] = extra[i];
}
}
int gfar_stats_count_normon(struct net_device *dev)
{
return GFAR_EXTRA_STATS_LEN;
}
/* Fills in the drvinfo structure with some basic info */
void gfar_gdrvinfo(struct net_device *dev, struct
ethtool_drvinfo *drvinfo)
{
strncpy(drvinfo->driver, gfar_driver_name, GFAR_INFOSTR_LEN);
strncpy(drvinfo->version, gfar_driver_version, GFAR_INFOSTR_LEN);
strncpy(drvinfo->fw_version, "N/A", GFAR_INFOSTR_LEN);
strncpy(drvinfo->bus_info, "N/A", GFAR_INFOSTR_LEN);
drvinfo->n_stats = GFAR_STATS_LEN;
drvinfo->testinfo_len = 0;
drvinfo->regdump_len = 0;
drvinfo->eedump_len = 0;
}
/* Return the current settings in the ethtool_cmd structure */
int gfar_gsettings(struct net_device *dev, struct ethtool_cmd *cmd)
{
struct gfar_private *priv = (struct gfar_private *) dev->priv;
uint gigabit_support =
priv->einfo->flags & GFAR_HAS_GIGABIT ? SUPPORTED_1000baseT_Full : 0;
uint gigabit_advert =
priv->einfo->flags & GFAR_HAS_GIGABIT ? ADVERTISED_1000baseT_Full: 0;
cmd->supported = (SUPPORTED_10baseT_Half
| SUPPORTED_100baseT_Half
| SUPPORTED_100baseT_Full
| gigabit_support | SUPPORTED_Autoneg);
/* For now, we always advertise everything */
cmd->advertising = (ADVERTISED_10baseT_Half
| ADVERTISED_100baseT_Half
| ADVERTISED_100baseT_Full
| gigabit_advert | ADVERTISED_Autoneg);
cmd->speed = priv->speed;
cmd->duplex = priv->duplexity;
cmd->port = PORT_MII;
cmd->phy_address = priv->einfo->phyid;
cmd->transceiver = XCVR_EXTERNAL;
cmd->autoneg = AUTONEG_ENABLE;
cmd->maxtxpkt = priv->txcount;
cmd->maxrxpkt = priv->rxcount;
return 0;
}
/* Return the length of the register structure */
int gfar_reglen(struct net_device *dev)
{
return sizeof (struct gfar);
}
/* Return a dump of the GFAR register space */
void gfar_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *regbuf)
{
int i;
struct gfar_private *priv = (struct gfar_private *) dev->priv;
u32 *theregs = (u32 *) priv->regs;
u32 *buf = (u32 *) regbuf;
for (i = 0; i < sizeof (struct gfar) / sizeof (u32); i++)
buf[i] = theregs[i];
}
/* Return the link state 1 is up, 0 is down */
u32 gfar_get_link(struct net_device *dev)
{
struct gfar_private *priv = (struct gfar_private *) dev->priv;
return (u32) priv->link;
}
/* Fill in a buffer with the strings which correspond to the
* stats */
void gfar_gstrings(struct net_device *dev, u32 stringset, u8 * buf)
{
memcpy(buf, stat_gstrings, GFAR_STATS_LEN * ETH_GSTRING_LEN);
}
/* Convert microseconds to ethernet clock ticks, which changes
* depending on what speed the controller is running at */
static unsigned int gfar_usecs2ticks(struct gfar_private *priv, unsigned int usecs)
{
unsigned int count;
/* The timer is different, depending on the interface speed */
switch (priv->speed) {
case 1000:
count = GFAR_GBIT_TIME;
break;
case 100:
count = GFAR_100_TIME;
break;
case 10:
default:
count = GFAR_10_TIME;
break;
}
/* Make sure we return a number greater than 0
* if usecs > 0 */
return ((usecs * 1000 + count - 1) / count);
}
/* Convert ethernet clock ticks to microseconds */
static unsigned int gfar_ticks2usecs(struct gfar_private *priv, unsigned int ticks)
{
unsigned int count;
/* The timer is different, depending on the interface speed */
switch (priv->speed) {
case 1000:
count = GFAR_GBIT_TIME;
break;
case 100:
count = GFAR_100_TIME;
break;
case 10:
default:
count = GFAR_10_TIME;
break;
}
/* Make sure we return a number greater than 0 */
/* if ticks is > 0 */
return ((ticks * count) / 1000);
}
/* Get the coalescing parameters, and put them in the cvals
* structure. */
int gfar_gcoalesce(struct net_device *dev, struct ethtool_coalesce *cvals)
{
struct gfar_private *priv = (struct gfar_private *) dev->priv;
cvals->rx_coalesce_usecs = gfar_ticks2usecs(priv, priv->rxtime);
cvals->rx_max_coalesced_frames = priv->rxcount;
cvals->tx_coalesce_usecs = gfar_ticks2usecs(priv, priv->txtime);
cvals->tx_max_coalesced_frames = priv->txcount;
cvals->use_adaptive_rx_coalesce = 0;
cvals->use_adaptive_tx_coalesce = 0;
cvals->pkt_rate_low = 0;
cvals->rx_coalesce_usecs_low = 0;
cvals->rx_max_coalesced_frames_low = 0;
cvals->tx_coalesce_usecs_low = 0;
cvals->tx_max_coalesced_frames_low = 0;
/* When the packet rate is below pkt_rate_high but above
* pkt_rate_low (both measured in packets per second) the
* normal {rx,tx}_* coalescing parameters are used.
*/
/* When the packet rate is (measured in packets per second)
* is above pkt_rate_high, the {rx,tx}_*_high parameters are
* used.
*/
cvals->pkt_rate_high = 0;
cvals->rx_coalesce_usecs_high = 0;
cvals->rx_max_coalesced_frames_high = 0;
cvals->tx_coalesce_usecs_high = 0;
cvals->tx_max_coalesced_frames_high = 0;
/* How often to do adaptive coalescing packet rate sampling,
* measured in seconds. Must not be zero.
*/
cvals->rate_sample_interval = 0;
return 0;
}
/* Change the coalescing values.
* Both cvals->*_usecs and cvals->*_frames have to be > 0
* in order for coalescing to be active
*/
int gfar_scoalesce(struct net_device *dev, struct ethtool_coalesce *cvals)
{
struct gfar_private *priv = (struct gfar_private *) dev->priv;
/* Set up rx coalescing */
if ((cvals->rx_coalesce_usecs == 0) ||
(cvals->rx_max_coalesced_frames == 0))
priv->rxcoalescing = 0;
else
priv->rxcoalescing = 1;
priv->rxtime = gfar_usecs2ticks(priv, cvals->rx_coalesce_usecs);
priv->rxcount = cvals->rx_max_coalesced_frames;
/* Set up tx coalescing */
if ((cvals->tx_coalesce_usecs == 0) ||
(cvals->tx_max_coalesced_frames == 0))
priv->txcoalescing = 0;
else
priv->txcoalescing = 1;
priv->txtime = gfar_usecs2ticks(priv, cvals->tx_coalesce_usecs);
priv->txcount = cvals->tx_max_coalesced_frames;
if (priv->rxcoalescing)
gfar_write(&priv->regs->rxic,
mk_ic_value(priv->rxcount, priv->rxtime));
else
gfar_write(&priv->regs->rxic, 0);
if (priv->txcoalescing)
gfar_write(&priv->regs->txic,
mk_ic_value(priv->txcount, priv->txtime));
else
gfar_write(&priv->regs->txic, 0);
return 0;
}
/* Fills in rvals with the current ring parameters. Currently,
* rx, rx_mini, and rx_jumbo rings are the same size, as mini and
* jumbo are ignored by the driver */
void gfar_gringparam(struct net_device *dev, struct ethtool_ringparam *rvals)
{
struct gfar_private *priv = (struct gfar_private *) dev->priv;
rvals->rx_max_pending = GFAR_RX_MAX_RING_SIZE;
rvals->rx_mini_max_pending = GFAR_RX_MAX_RING_SIZE;
rvals->rx_jumbo_max_pending = GFAR_RX_MAX_RING_SIZE;
rvals->tx_max_pending = GFAR_TX_MAX_RING_SIZE;
/* Values changeable by the user. The valid values are
* in the range 1 to the "*_max_pending" counterpart above.
*/
rvals->rx_pending = priv->rx_ring_size;
rvals->rx_mini_pending = priv->rx_ring_size;
rvals->rx_jumbo_pending = priv->rx_ring_size;
rvals->tx_pending = priv->tx_ring_size;
}
/* Change the current ring parameters, stopping the controller if
* necessary so that we don't mess things up while we're in
* motion. We wait for the ring to be clean before reallocating
* the rings. */
int gfar_sringparam(struct net_device *dev, struct ethtool_ringparam *rvals)
{
u32 tempval;
struct gfar_private *priv = (struct gfar_private *) dev->priv;
int err = 0;
if (rvals->rx_pending > GFAR_RX_MAX_RING_SIZE)
return -EINVAL;
if (!is_power_of_2(rvals->rx_pending)) {
printk("%s: Ring sizes must be a power of 2\n",
dev->name);
return -EINVAL;
}
if (rvals->tx_pending > GFAR_TX_MAX_RING_SIZE)
return -EINVAL;
if (!is_power_of_2(rvals->tx_pending)) {
printk("%s: Ring sizes must be a power of 2\n",
dev->name);
return -EINVAL;
}
/* Stop the controller so we don't rx any more frames */
/* But first, make sure we clear the bits */
tempval = gfar_read(&priv->regs->dmactrl);
tempval &= ~(DMACTRL_GRS | DMACTRL_GTS);
gfar_write(&priv->regs->dmactrl, tempval);
tempval = gfar_read(&priv->regs->dmactrl);
tempval |= (DMACTRL_GRS | DMACTRL_GTS);
gfar_write(&priv->regs->dmactrl, tempval);
while (!(gfar_read(&priv->regs->ievent) & (IEVENT_GRSC | IEVENT_GTSC)))
cpu_relax();
/* Note that rx is not clean right now */
priv->rxclean = 0;
if (dev->flags & IFF_UP) {
/* Tell the driver to process the rest of the frames */
gfar_receive(0, (void *) dev, NULL);
/* Now wait for it to be done */
wait_event_interruptible(priv->rxcleanupq, priv->rxclean);
/* Ok, all packets have been handled. Now we bring it down,
* change the ring size, and bring it up */
stop_gfar(dev);
}
priv->rx_ring_size = rvals->rx_pending;
priv->tx_ring_size = rvals->tx_pending;
if (dev->flags & IFF_UP)
err = startup_gfar(dev);
return err;
}
struct ethtool_ops gfar_ethtool_ops = {
.get_settings = gfar_gsettings,
.get_drvinfo = gfar_gdrvinfo,
.get_regs_len = gfar_reglen,
.get_regs = gfar_get_regs,
.get_link = gfar_get_link,
.get_coalesce = gfar_gcoalesce,
.set_coalesce = gfar_scoalesce,
.get_ringparam = gfar_gringparam,
.set_ringparam = gfar_sringparam,
.get_strings = gfar_gstrings,
.get_stats_count = gfar_stats_count,
.get_ethtool_stats = gfar_fill_stats,
};
drivers/net/gianfar_phy.c 0 → 100644
View file @ 3b2f1919
/*
* drivers/net/gianfar_phy.c
*
* Gianfar Ethernet Driver -- PHY handling
* Driver for FEC on MPC8540 and TSEC on MPC8540/MPC8560
* Based on 8260_io/fcc_enet.c
*
* Author: Andy Fleming
* Maintainer: Kumar Gala (kumar.gala@freescale.com)
*
* Copyright 2004 Freescale Semiconductor, Inc
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
*/
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/interrupt.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/mm.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/uaccess.h>
#include <linux/module.h>
#include <linux/version.h>
#include <linux/crc32.h>
#include "gianfar.h"
#include "gianfar_phy.h"
/* Write value to the PHY for this device to the register at regnum, */
/* waiting until the write is done before it returns. All PHY */
/* configuration has to be done through the TSEC1 MIIM regs */
void write_phy_reg(struct net_device *dev, u16 regnum, u16 value)
{
struct gfar_private *priv = (struct gfar_private *) dev->priv;
struct gfar *regbase = priv->phyregs;
struct ocp_gfar_data *einfo = priv->einfo;
/* Set the PHY address and the register address we want to write */
gfar_write(&regbase->miimadd, ((einfo->phyid) << 8) | regnum);
/* Write out the value we want */
gfar_write(&regbase->miimcon, value);
/* Wait for the transaction to finish */
while (gfar_read(&regbase->miimind) & MIIMIND_BUSY)
cpu_relax();
}
/* Reads from register regnum in the PHY for device dev, */
/* returning the value. Clears miimcom first. All PHY */
/* configuration has to be done through the TSEC1 MIIM regs */
u16 read_phy_reg(struct net_device *dev, u16 regnum)
{
struct gfar_private *priv = (struct gfar_private *) dev->priv;
struct gfar *regbase = priv->phyregs;
struct ocp_gfar_data *einfo = priv->einfo;
u16 value;
/* Set the PHY address and the register address we want to read */
gfar_write(&regbase->miimadd, ((einfo->phyid) << 8) | regnum);
/* Clear miimcom, and then initiate a read */
gfar_write(&regbase->miimcom, 0);
gfar_write(&regbase->miimcom, MIIM_READ_COMMAND);
/* Wait for the transaction to finish */
while (gfar_read(&regbase->miimind) & (MIIMIND_NOTVALID | MIIMIND_BUSY))
cpu_relax();
/* Grab the value of the register from miimstat */
value = gfar_read(&regbase->miimstat);
return value;
}
/* returns which value to write to the control register. */
/* For 10/100 the value is slightly different. */
u16 mii_cr_init(u16 mii_reg, struct net_device * dev)
{
struct gfar_private *priv = (struct gfar_private *) dev->priv;
struct ocp_gfar_data *einfo = priv->einfo;
if (einfo->flags & GFAR_HAS_GIGABIT)
return MIIM_CONTROL_INIT;
else
return MIIM_CR_INIT;
}
#define BRIEF_GFAR_ERRORS
/* Wait for auto-negotiation to complete */
u16 mii_parse_sr(u16 mii_reg, struct net_device * dev)
{
struct gfar_private *priv = (struct gfar_private *) dev->priv;
unsigned int timeout = GFAR_AN_TIMEOUT;
if (mii_reg & MIIM_STATUS_LINK)
priv->link = 1;
else
priv->link = 0;
/* Only auto-negotiate if the link has just gone up */
if (priv->link && !priv->oldlink) {
while ((!(mii_reg & MIIM_STATUS_AN_DONE)) && timeout--)
mii_reg = read_phy_reg(dev, MIIM_STATUS);
#if defined(BRIEF_GFAR_ERRORS)
if (mii_reg & MIIM_STATUS_AN_DONE)
printk(KERN_INFO "%s: Auto-negotiation done\n",
dev->name);
else
printk(KERN_INFO "%s: Auto-negotiation timed out\n",
dev->name);
#endif
}
return 0;
}
/* Determine the speed and duplex which was negotiated */
u16 mii_parse_88E1011_psr(u16 mii_reg, struct net_device * dev)
{
struct gfar_private *priv = (struct gfar_private *) dev->priv;
unsigned int speed;
if (priv->link) {
if (mii_reg & MIIM_88E1011_PHYSTAT_DUPLEX)
priv->duplexity = 1;
else
priv->duplexity = 0;
speed = (mii_reg & MIIM_88E1011_PHYSTAT_SPEED);
switch (speed) {
case MIIM_88E1011_PHYSTAT_GBIT:
priv->speed = 1000;
break;
case MIIM_88E1011_PHYSTAT_100:
priv->speed = 100;
break;
default:
priv->speed = 10;
break;
}
} else {
priv->speed = 0;
priv->duplexity = 0;
}
return 0;
}
u16 mii_parse_cis8201(u16 mii_reg, struct net_device * dev)
{
struct gfar_private *priv = (struct gfar_private *) dev->priv;
unsigned int speed;
if (priv->link) {
if (mii_reg & MIIM_CIS8201_AUXCONSTAT_DUPLEX)
priv->duplexity = 1;
else
priv->duplexity = 0;
speed = mii_reg & MIIM_CIS8201_AUXCONSTAT_SPEED;
switch (speed) {
case MIIM_CIS8201_AUXCONSTAT_GBIT:
priv->speed = 1000;
break;
case MIIM_CIS8201_AUXCONSTAT_100:
priv->speed = 100;
break;
default:
priv->speed = 10;
break;
}
} else {
priv->speed = 0;
priv->duplexity = 0;
}
return 0;
}
u16 mii_parse_dm9161_scsr(u16 mii_reg, struct net_device * dev)
{
struct gfar_private *priv = (struct gfar_private *) dev->priv;
if (mii_reg & (MIIM_DM9161_SCSR_100F | MIIM_DM9161_SCSR_100H))
priv->speed = 100;
else
priv->speed = 10;
if (mii_reg & (MIIM_DM9161_SCSR_100F | MIIM_DM9161_SCSR_10F))
priv->duplexity = 1;
else
priv->duplexity = 0;
return 0;
}
u16 dm9161_wait(u16 mii_reg, struct net_device *dev)
{
int timeout = HZ;
int secondary = 10;
u16 temp;
do {
/* Davicom takes a bit to come up after a reset,
* so wait here for a bit */
set_current_state(TASK_UNINTERRUPTIBLE);
schedule_timeout(timeout);
temp = read_phy_reg(dev, MIIM_STATUS);
secondary--;
} while ((!(temp & MIIM_STATUS_AN_DONE)) && secondary);
return 0;
}
static struct phy_info phy_info_M88E1011S = {
0x01410c6,
"Marvell 88E1011S",
4,
(const struct phy_cmd[]) { /* config */
/* Reset and configure the PHY */
{MIIM_CONTROL, MIIM_CONTROL_INIT, mii_cr_init},
{miim_end,}
},
(const struct phy_cmd[]) { /* startup */
/* Status is read once to clear old link state */
{MIIM_STATUS, miim_read, NULL},
/* Auto-negotiate */
{MIIM_STATUS, miim_read, mii_parse_sr},
/* Read the status */
{MIIM_88E1011_PHY_STATUS, miim_read, mii_parse_88E1011_psr},
/* Clear the IEVENT register */
{MIIM_88E1011_IEVENT, miim_read, NULL},
/* Set up the mask */
{MIIM_88E1011_IMASK, MIIM_88E1011_IMASK_INIT, NULL},
{miim_end,}
},
(const struct phy_cmd[]) { /* ack_int */
/* Clear the interrupt */
{MIIM_88E1011_IEVENT, miim_read, NULL},
/* Disable interrupts */
{MIIM_88E1011_IMASK, MIIM_88E1011_IMASK_CLEAR, NULL},
{miim_end,}
},
(const struct phy_cmd[]) { /* handle_int */
/* Read the Status (2x to make sure link is right) */
{MIIM_STATUS, miim_read, NULL},
/* Check the status */
{MIIM_STATUS, miim_read, mii_parse_sr},
{MIIM_88E1011_PHY_STATUS, miim_read, mii_parse_88E1011_psr},
/* Enable Interrupts */
{MIIM_88E1011_IMASK, MIIM_88E1011_IMASK_INIT, NULL},
{miim_end,}
},
(const struct phy_cmd[]) { /* shutdown */
{MIIM_88E1011_IEVENT, miim_read, NULL},
{MIIM_88E1011_IMASK, MIIM_88E1011_IMASK_CLEAR, NULL},
{miim_end,}
},
};
/* Cicada 8204 */
static struct phy_info phy_info_cis8204 = {
0x3f11,
"Cicada Cis8204",
6,
(const struct phy_cmd[]) { /* config */
/* Override PHY config settings */
{MIIM_CIS8201_AUX_CONSTAT, MIIM_CIS8201_AUXCONSTAT_INIT, NULL},
/* Set up the interface mode */
{MIIM_CIS8201_EXT_CON1, MIIM_CIS8201_EXTCON1_INIT, NULL},
/* Configure some basic stuff */
{MIIM_CONTROL, MIIM_CONTROL_INIT, mii_cr_init},
{miim_end,}
},
(const struct phy_cmd[]) { /* startup */
/* Read the Status (2x to make sure link is right) */
{MIIM_STATUS, miim_read, NULL},
/* Auto-negotiate */
{MIIM_STATUS, miim_read, mii_parse_sr},
/* Read the status */
{MIIM_CIS8201_AUX_CONSTAT, miim_read, mii_parse_cis8201},
/* Clear the status register */
{MIIM_CIS8204_ISTAT, miim_read, NULL},
/* Enable interrupts */
{MIIM_CIS8204_IMASK, MIIM_CIS8204_IMASK_MASK, NULL},
{miim_end,}
},
(const struct phy_cmd[]) { /* ack_int */
/* Clear the status register */
{MIIM_CIS8204_ISTAT, miim_read, NULL},
/* Disable interrupts */
{MIIM_CIS8204_IMASK, 0x0, NULL},
{miim_end,}
},
(const struct phy_cmd[]) { /* handle_int */
/* Read the Status (2x to make sure link is right) */
{MIIM_STATUS, miim_read, NULL},
/* Auto-negotiate */
{MIIM_STATUS, miim_read, mii_parse_sr},
/* Read the status */
{MIIM_CIS8201_AUX_CONSTAT, miim_read, mii_parse_cis8201},
/* Enable interrupts */
{MIIM_CIS8204_IMASK, MIIM_CIS8204_IMASK_MASK, NULL},
{miim_end,}
},
(const struct phy_cmd[]) { /* shutdown */
/* Clear the status register */
{MIIM_CIS8204_ISTAT, miim_read, NULL},
/* Disable interrupts */
{MIIM_CIS8204_IMASK, 0x0, NULL},
{miim_end,}
},
};
/* Cicada 8201 */
static struct phy_info phy_info_cis8201 = {
0xfc41,
"CIS8201",
4,
(const struct phy_cmd[]) { /* config */
/* Override PHY config settings */
{MIIM_CIS8201_AUX_CONSTAT, MIIM_CIS8201_AUXCONSTAT_INIT, NULL},
/* Set up the interface mode */
{MIIM_CIS8201_EXT_CON1, MIIM_CIS8201_EXTCON1_INIT, NULL},
/* Configure some basic stuff */
{MIIM_CONTROL, MIIM_CONTROL_INIT, mii_cr_init},
{miim_end,}
},
(const struct phy_cmd[]) { /* startup */
/* Read the Status (2x to make sure link is right) */
{MIIM_STATUS, miim_read, NULL},
/* Auto-negotiate */
{MIIM_STATUS, miim_read, mii_parse_sr},
/* Read the status */
{MIIM_CIS8201_AUX_CONSTAT, miim_read, mii_parse_cis8201},
{miim_end,}
},
(const struct phy_cmd[]) { /* ack_int */
{miim_end,}
},
(const struct phy_cmd[]) { /* handle_int */
{miim_end,}
},
(const struct phy_cmd[]) { /* shutdown */
{miim_end,}
},
};
static struct phy_info phy_info_dm9161 = {
0x0181b88,
"Davicom DM9161E",
4,
(const struct phy_cmd[]) { /* config */
{MIIM_CONTROL, MIIM_DM9161_CR_STOP, NULL},
/* Do not bypass the scrambler/descrambler */
{MIIM_DM9161_SCR, MIIM_DM9161_SCR_INIT, NULL},
/* Clear 10BTCSR to default */
{MIIM_DM9161_10BTCSR, MIIM_DM9161_10BTCSR_INIT, NULL},
/* Configure some basic stuff */
{MIIM_CONTROL, MIIM_CR_INIT, NULL},
{miim_end,}
},
(const struct phy_cmd[]) { /* startup */
/* Restart Auto Negotiation */
{MIIM_CONTROL, MIIM_DM9161_CR_RSTAN, NULL},
/* Status is read once to clear old link state */
{MIIM_STATUS, miim_read, dm9161_wait},
/* Auto-negotiate */
{MIIM_STATUS, miim_read, mii_parse_sr},
/* Read the status */
{MIIM_DM9161_SCSR, miim_read, mii_parse_dm9161_scsr},
/* Clear any pending interrupts */
{MIIM_DM9161_INTR, miim_read, NULL},
{miim_end,}
},
(const struct phy_cmd[]) { /* ack_int */
{MIIM_DM9161_INTR, miim_read, NULL},
{miim_end,}
},
(const struct phy_cmd[]) { /* handle_int */
{MIIM_STATUS, miim_read, NULL},
{MIIM_STATUS, miim_read, mii_parse_sr},
{MIIM_DM9161_SCSR, miim_read, mii_parse_dm9161_scsr},
{miim_end,}
},
(const struct phy_cmd[]) { /* shutdown */
{MIIM_DM9161_INTR, miim_read, NULL},
{miim_end,}
},
};
static struct phy_info *phy_info[] = {
&phy_info_cis8201,
&phy_info_cis8204,
&phy_info_M88E1011S,
&phy_info_dm9161,
NULL
};
/* Use the PHY ID registers to determine what type of PHY is attached
* to device dev. return a struct phy_info structure describing that PHY
*/
struct phy_info * get_phy_info(struct net_device *dev)
{
u16 phy_reg;
u32 phy_ID;
int i;
struct phy_info *theInfo = NULL;
/* Grab the bits from PHYIR1, and put them in the upper half */
phy_reg = read_phy_reg(dev, MIIM_PHYIR1);
phy_ID = (phy_reg & 0xffff) << 16;
/* Grab the bits from PHYIR2, and put them in the lower half */
phy_reg = read_phy_reg(dev, MIIM_PHYIR2);
phy_ID |= (phy_reg & 0xffff);
/* loop through all the known PHY types, and find one that */
/* matches the ID we read from the PHY. */
for (i = 0; phy_info[i]; i++)
if (phy_info[i]->id == (phy_ID >> phy_info[i]->shift))
theInfo = phy_info[i];
if (theInfo == NULL) {
printk("%s: PHY id %x is not supported!\n", dev->name, phy_ID);
return NULL;
} else {
printk("%s: PHY is %s (%x)\n", dev->name, theInfo->name,
phy_ID);
}
return theInfo;
}
/* Take a list of struct phy_cmd, and, depending on the values, either */
/* read or write, using a helper function if provided */
/* It is assumed that all lists of struct phy_cmd will be terminated by */
/* mii_end. */
void phy_run_commands(struct net_device *dev, const struct phy_cmd *cmd)
{
int i;
u16 result;
struct gfar_private *priv = (struct gfar_private *) dev->priv;
struct gfar *phyregs = priv->phyregs;
/* Reset the management interface */
gfar_write(&phyregs->miimcfg, MIIMCFG_RESET);
/* Setup the MII Mgmt clock speed */
gfar_write(&phyregs->miimcfg, MIIMCFG_INIT_VALUE);
/* Wait until the bus is free */
while (gfar_read(&phyregs->miimind) & MIIMIND_BUSY)
cpu_relax();
for (i = 0; cmd->mii_reg != miim_end; i++) {
/* The command is a read if mii_data is miim_read */
if (cmd->mii_data == miim_read) {
/* Read the value of the PHY reg */
result = read_phy_reg(dev, cmd->mii_reg);
/* If a function was supplied, we need to let it process */
/* the result. */
if (cmd->funct != NULL)
(*(cmd->funct)) (result, dev);
} else { /* Otherwise, it's a write */
/* If a function was supplied, it will provide
* the value to write */
/* Otherwise, the value was supplied in cmd->mii_data */
if (cmd->funct != NULL)
result = (*(cmd->funct)) (0, dev);
else
result = cmd->mii_data;
/* Write the appropriate value to the PHY reg */
write_phy_reg(dev, cmd->mii_reg, result);
}
cmd++;
}
}
drivers/net/gianfar_phy.h 0 → 100644
View file @ 3b2f1919
/*
* drivers/net/gianfar_phy.h
*
* Gianfar Ethernet Driver -- PHY handling
* Driver for FEC on MPC8540 and TSEC on MPC8540/MPC8560
* Based on 8260_io/fcc_enet.c
*
* Author: Andy Fleming
* Maintainer: Kumar Gala (kumar.gala@freescale.com)
*
* Copyright 2004 Freescale Semiconductor, Inc
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
*/
#ifndef __GIANFAR_PHY_H
#define __GIANFAR_PHY_H
#define miim_end ((u32)-2)
#define miim_read ((u32)-1)
#define MIIMIND_BUSY 0x00000001
#define MIIMIND_NOTVALID 0x00000004
#define MIIM_CONTROL 0x00
#define MIIM_CONTROL_RESET 0x00008000
#define MIIM_CONTROL_INIT 0x00001140
#define MIIM_ANEN 0x00001000
#define MIIM_CR 0x00
#define MIIM_CR_RST 0x00008000
#define MIIM_CR_INIT 0x00001000
#define MIIM_STATUS 0x1
#define MIIM_STATUS_AN_DONE 0x00000020
#define MIIM_STATUS_LINK 0x0004
#define MIIM_PHYIR1 0x2
#define MIIM_PHYIR2 0x3
#define GFAR_AN_TIMEOUT 0x000fffff
#define MIIM_ANLPBPA 0x5
#define MIIM_ANLPBPA_HALF 0x00000040
#define MIIM_ANLPBPA_FULL 0x00000020
#define MIIM_ANEX 0x6
#define MIIM_ANEX_NP 0x00000004
#define MIIM_ANEX_PRX 0x00000002
/* Cicada Extended Control Register 1 */
#define MIIM_CIS8201_EXT_CON1 0x17
#define MIIM_CIS8201_EXTCON1_INIT 0x0000
/* Cicada Interrupt Mask Register */
#define MIIM_CIS8204_IMASK 0x19
#define MIIM_CIS8204_IMASK_IEN 0x8000
#define MIIM_CIS8204_IMASK_SPEED 0x4000
#define MIIM_CIS8204_IMASK_LINK 0x2000
#define MIIM_CIS8204_IMASK_DUPLEX 0x1000
#define MIIM_CIS8204_IMASK_MASK 0xf000
/* Cicada Interrupt Status Register */
#define MIIM_CIS8204_ISTAT 0x1a
#define MIIM_CIS8204_ISTAT_STATUS 0x8000
#define MIIM_CIS8204_ISTAT_SPEED 0x4000
#define MIIM_CIS8204_ISTAT_LINK 0x2000
#define MIIM_CIS8204_ISTAT_DUPLEX 0x1000
/* Cicada Auxiliary Control/Status Register */
#define MIIM_CIS8201_AUX_CONSTAT 0x1c
#define MIIM_CIS8201_AUXCONSTAT_INIT 0x0004
#define MIIM_CIS8201_AUXCONSTAT_DUPLEX 0x0020
#define MIIM_CIS8201_AUXCONSTAT_SPEED 0x0018
#define MIIM_CIS8201_AUXCONSTAT_GBIT 0x0010
#define MIIM_CIS8201_AUXCONSTAT_100 0x0008
/* 88E1011 PHY Status Register */
#define MIIM_88E1011_PHY_STATUS 0x11
#define MIIM_88E1011_PHYSTAT_SPEED 0xc000
#define MIIM_88E1011_PHYSTAT_GBIT 0x8000
#define MIIM_88E1011_PHYSTAT_100 0x4000
#define MIIM_88E1011_PHYSTAT_DUPLEX 0x2000
#define MIIM_88E1011_PHYSTAT_LINK 0x0400
#define MIIM_88E1011_IEVENT 0x13
#define MIIM_88E1011_IEVENT_CLEAR 0x0000
#define MIIM_88E1011_IMASK 0x12
#define MIIM_88E1011_IMASK_INIT 0x6400
#define MIIM_88E1011_IMASK_CLEAR 0x0000
/* DM9161 Control register values */
#define MIIM_DM9161_CR_STOP 0x0400
#define MIIM_DM9161_CR_RSTAN 0x1200
#define MIIM_DM9161_SCR 0x10
#define MIIM_DM9161_SCR_INIT 0x0610
/* DM9161 Specified Configuration and Status Register */
#define MIIM_DM9161_SCSR 0x11
#define MIIM_DM9161_SCSR_100F 0x8000
#define MIIM_DM9161_SCSR_100H 0x4000
#define MIIM_DM9161_SCSR_10F 0x2000
#define MIIM_DM9161_SCSR_10H 0x1000
/* DM9161 Interrupt Register */
#define MIIM_DM9161_INTR 0x15
#define MIIM_DM9161_INTR_PEND 0x8000
#define MIIM_DM9161_INTR_DPLX_MASK 0x0800
#define MIIM_DM9161_INTR_SPD_MASK 0x0400
#define MIIM_DM9161_INTR_LINK_MASK 0x0200
#define MIIM_DM9161_INTR_MASK 0x0100
#define MIIM_DM9161_INTR_DPLX_CHANGE 0x0010
#define MIIM_DM9161_INTR_SPD_CHANGE 0x0008
#define MIIM_DM9161_INTR_LINK_CHANGE 0x0004
#define MIIM_DM9161_INTR_INIT 0x0000
#define MIIM_DM9161_INTR_STOP \
(MIIM_DM9161_INTR_DPLX_MASK | MIIM_DM9161_INTR_SPD_MASK \
| MIIM_DM9161_INTR_LINK_MASK | MIIM_DM9161_INTR_MASK)
/* DM9161 10BT Configuration/Status */
#define MIIM_DM9161_10BTCSR 0x12
#define MIIM_DM9161_10BTCSR_INIT 0x7800
#define MIIM_READ_COMMAND 0x00000001
/*
* struct phy_cmd: A command for reading or writing a PHY register
*
* mii_reg: The register to read or write
*
* mii_data: For writes, the value to put in the register.
* A value of -1 indicates this is a read.
*
* funct: A function pointer which is invoked for each command.
* For reads, this function will be passed the value read
* from the PHY, and process it.
* For writes, the result of this function will be written
* to the PHY register
*/
struct phy_cmd {
u32 mii_reg;
u32 mii_data;
u16 (*funct) (u16 mii_reg, struct net_device * dev);
};
/* struct phy_info: a structure which defines attributes for a PHY
*
* id will contain a number which represents the PHY. During
* startup, the driver will poll the PHY to find out what its
* UID--as defined by registers 2 and 3--is. The 32-bit result
* gotten from the PHY will be shifted right by "shift" bits to
* discard any bits which may change based on revision numbers
* unimportant to functionality
*
* The struct phy_cmd entries represent pointers to an arrays of
* commands which tell the driver what to do to the PHY.
*/
struct phy_info {
u32 id;
char *name;
unsigned int shift;
/* Called to configure the PHY, and modify the controller
* based on the results */
const struct phy_cmd *config;
/* Called when starting up the controller. Usually sets
* up the interrupt for state changes */
const struct phy_cmd *startup;
/* Called inside the interrupt handler to acknowledge
* the interrupt */
const struct phy_cmd *ack_int;
/* Called in the bottom half to handle the interrupt */
const struct phy_cmd *handle_int;
/* Called when bringing down the controller. Usually stops
* the interrupts from being generated */
const struct phy_cmd *shutdown;
};
struct phy_info *get_phy_info(struct net_device *dev);
void phy_run_commands(struct net_device *dev, const struct phy_cmd *cmd);
#endif /* GIANFAR_PHY_H */
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