+++ /dev/null
-/*
- * Copyright 2000, 2001 MontaVista Software Inc.
- * Author: MontaVista Software, Inc.
- * stevel@mvista.com or source@mvista.com
- *
- * This program is free software; you can distribute it and/or modify it
- * under the terms of the GNU General Public License (Version 2) as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
- * for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
- *
- * Ethernet driver for the MIPS GT96100 Advanced Communication Controller.
- *
- * Revision history
- *
- * 11.11.2001 Moved to 2.4.14, ppopov@mvista.com. Modified driver to add
- * proper gt96100A support.
- * 12.05.2001 Moved eth port 0 to irq 3 (mapped to GT_SERINT0 on EV96100A)
- * in order for both ports to work. Also cleaned up boot
- * option support (mac address string parsing), fleshed out
- * gt96100_cleanup_module(), and other general code cleanups
- * <stevel@mvista.com>.
- */
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/string.h>
-#include <linux/timer.h>
-#include <linux/errno.h>
-#include <linux/in.h>
-#include <linux/ioport.h>
-#include <linux/slab.h>
-#include <linux/interrupt.h>
-#include <linux/pci.h>
-#include <linux/init.h>
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include <linux/skbuff.h>
-#include <linux/delay.h>
-#include <linux/ctype.h>
-#include <linux/bitops.h>
-
-#include <asm/irq.h>
-#include <asm/io.h>
-
-#define DESC_BE 1
-#define DESC_DATA_BE 1
-
-#define GT96100_DEBUG 2
-
-#include "gt96100eth.h"
-
-// prototypes
-static void* dmaalloc(size_t size, dma_addr_t *dma_handle);
-static void dmafree(size_t size, void *vaddr);
-static void gt96100_delay(int msec);
-static int gt96100_add_hash_entry(struct net_device *dev,
- unsigned char* addr);
-static void read_mib_counters(struct gt96100_private *gp);
-static int read_MII(int phy_addr, u32 reg);
-static int write_MII(int phy_addr, u32 reg, u16 data);
-static int gt96100_init_module(void);
-static void gt96100_cleanup_module(void);
-static void dump_MII(int dbg_lvl, struct net_device *dev);
-static void dump_tx_desc(int dbg_lvl, struct net_device *dev, int i);
-static void dump_rx_desc(int dbg_lvl, struct net_device *dev, int i);
-static void dump_skb(int dbg_lvl, struct net_device *dev,
- struct sk_buff *skb);
-static void update_stats(struct gt96100_private *gp);
-static void abort(struct net_device *dev, u32 abort_bits);
-static void hard_stop(struct net_device *dev);
-static void enable_ether_irq(struct net_device *dev);
-static void disable_ether_irq(struct net_device *dev);
-static int gt96100_probe1(struct pci_dev *pci, int port_num);
-static void reset_tx(struct net_device *dev);
-static void reset_rx(struct net_device *dev);
-static int gt96100_check_tx_consistent(struct gt96100_private *gp);
-static int gt96100_init(struct net_device *dev);
-static int gt96100_open(struct net_device *dev);
-static int gt96100_close(struct net_device *dev);
-static int gt96100_tx(struct sk_buff *skb, struct net_device *dev);
-static int gt96100_rx(struct net_device *dev, u32 status);
-static irqreturn_t gt96100_interrupt(int irq, void *dev_id, struct pt_regs *regs);
-static void gt96100_tx_timeout(struct net_device *dev);
-static void gt96100_set_rx_mode(struct net_device *dev);
-static struct net_device_stats* gt96100_get_stats(struct net_device *dev);
-
-extern char * __init prom_getcmdline(void);
-
-static int max_interrupt_work = 32;
-
-#define nibswap(x) ((((x) >> 4) & 0x0f) | (((x) << 4) & 0xf0))
-
-#define RUN_AT(x) (jiffies + (x))
-
-// For reading/writing 32-bit words and half-words from/to DMA memory
-#ifdef DESC_BE
-#define cpu_to_dma32 cpu_to_be32
-#define dma32_to_cpu be32_to_cpu
-#define cpu_to_dma16 cpu_to_be16
-#define dma16_to_cpu be16_to_cpu
-#else
-#define cpu_to_dma32 cpu_to_le32
-#define dma32_to_cpu le32_to_cpu
-#define cpu_to_dma16 cpu_to_le16
-#define dma16_to_cpu le16_to_cpu
-#endif
-
-static char mac0[18] = "00.02.03.04.05.06";
-static char mac1[18] = "00.01.02.03.04.05";
-module_param_string(mac0, mac0, 18, 0);
-module_param_string(mac1, mac0, 18, 0);
-MODULE_PARM_DESC(mac0, "MAC address for GT96100 ethernet port 0");
-MODULE_PARM_DESC(mac1, "MAC address for GT96100 ethernet port 1");
-
-/*
- * Info for the GT96100 ethernet controller's ports.
- */
-static struct gt96100_if_t {
- struct net_device *dev;
- unsigned int iobase; // IO Base address of this port
- int irq; // IRQ number of this port
- char *mac_str;
-} gt96100_iflist[NUM_INTERFACES] = {
- {
- NULL,
- GT96100_ETH0_BASE, GT96100_ETHER0_IRQ,
- mac0
- },
- {
- NULL,
- GT96100_ETH1_BASE, GT96100_ETHER1_IRQ,
- mac1
- }
-};
-
-static inline const char*
-chip_name(int chip_rev)
-{
- switch (chip_rev) {
- case REV_GT96100:
- return "GT96100";
- case REV_GT96100A_1:
- case REV_GT96100A:
- return "GT96100A";
- default:
- return "Unknown GT96100";
- }
-}
-
-/*
- DMA memory allocation, derived from pci_alloc_consistent.
-*/
-static void * dmaalloc(size_t size, dma_addr_t *dma_handle)
-{
- void *ret;
-
- ret = (void *)__get_free_pages(GFP_ATOMIC | GFP_DMA, get_order(size));
-
- if (ret != NULL) {
- dma_cache_inv((unsigned long)ret, size);
- if (dma_handle != NULL)
- *dma_handle = virt_to_phys(ret);
-
- /* bump virtual address up to non-cached area */
- ret = (void*)KSEG1ADDR(ret);
- }
-
- return ret;
-}
-
-static void dmafree(size_t size, void *vaddr)
-{
- vaddr = (void*)KSEG0ADDR(vaddr);
- free_pages((unsigned long)vaddr, get_order(size));
-}
-
-static void gt96100_delay(int ms)
-{
- if (in_interrupt())
- return;
- else
- msleep_interruptible(ms);
-}
-
-static int
-parse_mac_addr(struct net_device *dev, char* macstr)
-{
- int i, j;
- unsigned char result, value;
-
- for (i=0; i<6; i++) {
- result = 0;
- if (i != 5 && *(macstr+2) != '.') {
- err(__FILE__ "invalid mac address format: %d %c\n",
- i, *(macstr+2));
- return -EINVAL;
- }
-
- for (j=0; j<2; j++) {
- if (isxdigit(*macstr) &&
- (value = isdigit(*macstr) ? *macstr-'0' :
- toupper(*macstr)-'A'+10) < 16) {
- result = result*16 + value;
- macstr++;
- } else {
- err(__FILE__ "invalid mac address "
- "character: %c\n", *macstr);
- return -EINVAL;
- }
- }
-
- macstr++; // step over '.'
- dev->dev_addr[i] = result;
- }
-
- return 0;
-}
-
-
-static int
-read_MII(int phy_addr, u32 reg)
-{
- int timedout = 20;
- u32 smir = smirOpCode | (phy_addr << smirPhyAdBit) |
- (reg << smirRegAdBit);
-
- // wait for last operation to complete
- while (GT96100_READ(GT96100_ETH_SMI_REG) & smirBusy) {
- // snooze for 1 msec and check again
- gt96100_delay(1);
-
- if (--timedout == 0) {
- printk(KERN_ERR "%s: busy timeout!!\n", __FUNCTION__);
- return -ENODEV;
- }
- }
-
- GT96100_WRITE(GT96100_ETH_SMI_REG, smir);
-
- timedout = 20;
- // wait for read to complete
- while (!((smir = GT96100_READ(GT96100_ETH_SMI_REG)) & smirReadValid)) {
- // snooze for 1 msec and check again
- gt96100_delay(1);
-
- if (--timedout == 0) {
- printk(KERN_ERR "%s: timeout!!\n", __FUNCTION__);
- return -ENODEV;
- }
- }
-
- return (int)(smir & smirDataMask);
-}
-
-static void
-dump_tx_desc(int dbg_lvl, struct net_device *dev, int i)
-{
- struct gt96100_private *gp = netdev_priv(dev);
- gt96100_td_t *td = &gp->tx_ring[i];
-
- dbg(dbg_lvl, "Tx descriptor at 0x%08lx:\n", virt_to_phys(td));
- dbg(dbg_lvl,
- " cmdstat=%04x, byte_cnt=%04x, buff_ptr=%04x, next=%04x\n",
- dma32_to_cpu(td->cmdstat),
- dma16_to_cpu(td->byte_cnt),
- dma32_to_cpu(td->buff_ptr),
- dma32_to_cpu(td->next));
-}
-
-static void
-dump_rx_desc(int dbg_lvl, struct net_device *dev, int i)
-{
- struct gt96100_private *gp = netdev_priv(dev);
- gt96100_rd_t *rd = &gp->rx_ring[i];
-
- dbg(dbg_lvl, "Rx descriptor at 0x%08lx:\n", virt_to_phys(rd));
- dbg(dbg_lvl, " cmdstat=%04x, buff_sz=%04x, byte_cnt=%04x, "
- "buff_ptr=%04x, next=%04x\n",
- dma32_to_cpu(rd->cmdstat),
- dma16_to_cpu(rd->buff_sz),
- dma16_to_cpu(rd->byte_cnt),
- dma32_to_cpu(rd->buff_ptr),
- dma32_to_cpu(rd->next));
-}
-
-static int
-write_MII(int phy_addr, u32 reg, u16 data)
-{
- int timedout = 20;
- u32 smir = (phy_addr << smirPhyAdBit) |
- (reg << smirRegAdBit) | data;
-
- // wait for last operation to complete
- while (GT96100_READ(GT96100_ETH_SMI_REG) & smirBusy) {
- // snooze for 1 msec and check again
- gt96100_delay(1);
-
- if (--timedout == 0) {
- printk(KERN_ERR "%s: busy timeout!!\n", __FUNCTION__);
- return -1;
- }
- }
-
- GT96100_WRITE(GT96100_ETH_SMI_REG, smir);
- return 0;
-}
-
-static void
-dump_MII(int dbg_lvl, struct net_device *dev)
-{
- int i, val;
- struct gt96100_private *gp = netdev_priv(dev);
-
- if (dbg_lvl <= GT96100_DEBUG) {
- for (i=0; i<7; i++) {
- if ((val = read_MII(gp->phy_addr, i)) >= 0)
- printk("MII Reg %d=%x\n", i, val);
- }
- for (i=16; i<21; i++) {
- if ((val = read_MII(gp->phy_addr, i)) >= 0)
- printk("MII Reg %d=%x\n", i, val);
- }
- }
-}
-
-static void
-dump_hw_addr(int dbg_lvl, struct net_device *dev, const char* pfx,
- const char* func, unsigned char* addr_str)
-{
- int i;
- char buf[100], octet[5];
-
- if (dbg_lvl <= GT96100_DEBUG) {
- sprintf(buf, pfx, func);
- for (i = 0; i < 6; i++) {
- sprintf(octet, "%2.2x%s",
- addr_str[i], i<5 ? ":" : "\n");
- strcat(buf, octet);
- }
- info("%s", buf);
- }
-}
-
-
-static void
-dump_skb(int dbg_lvl, struct net_device *dev, struct sk_buff *skb)
-{
- int i;
- unsigned char* skbdata;
-
- if (dbg_lvl <= GT96100_DEBUG) {
- dbg(dbg_lvl, "%s: skb=%p, skb->data=%p, skb->len=%d\n",
- __FUNCTION__, skb, skb->data, skb->len);
-
- skbdata = (unsigned char*)KSEG1ADDR(skb->data);
-
- for (i=0; i<skb->len; i++) {
- if (!(i % 16))
- printk(KERN_DEBUG "\n %3.3x: %2.2x,",
- i, skbdata[i]);
- else
- printk(KERN_DEBUG "%2.2x,", skbdata[i]);
- }
- printk(KERN_DEBUG "\n");
- }
-}
-
-
-static int
-gt96100_add_hash_entry(struct net_device *dev, unsigned char* addr)
-{
- struct gt96100_private *gp = netdev_priv(dev);
- //u16 hashResult, stmp;
- //unsigned char ctmp, hash_ea[6];
- u32 tblEntry1, tblEntry0, *tblEntryAddr;
- int i;
-
- tblEntry1 = hteValid | hteRD;
- tblEntry1 |= (u32)addr[5] << 3;
- tblEntry1 |= (u32)addr[4] << 11;
- tblEntry1 |= (u32)addr[3] << 19;
- tblEntry1 |= ((u32)addr[2] & 0x1f) << 27;
- dbg(3, "%s: tblEntry1=%x\n", __FUNCTION__, tblEntry1);
- tblEntry0 = ((u32)addr[2] >> 5) & 0x07;
- tblEntry0 |= (u32)addr[1] << 3;
- tblEntry0 |= (u32)addr[0] << 11;
- dbg(3, "%s: tblEntry0=%x\n", __FUNCTION__, tblEntry0);
-
-#if 0
-
- for (i=0; i<6; i++) {
- // nibble swap
- ctmp = nibswap(addr[i]);
- // invert every nibble
- hash_ea[i] = ((ctmp&1)<<3) | ((ctmp&8)>>3) |
- ((ctmp&2)<<1) | ((ctmp&4)>>1);
- hash_ea[i] |= ((ctmp&0x10)<<3) | ((ctmp&0x80)>>3) |
- ((ctmp&0x20)<<1) | ((ctmp&0x40)>>1);
- }
-
- dump_hw_addr(3, dev, "%s: nib swap/invt addr=", __FUNCTION__, hash_ea);
-
- if (gp->hash_mode == 0) {
- hashResult = ((u16)hash_ea[0] & 0xfc) << 7;
- stmp = ((u16)hash_ea[0] & 0x03) |
- (((u16)hash_ea[1] & 0x7f) << 2);
- stmp ^= (((u16)hash_ea[1] >> 7) & 0x01) |
- ((u16)hash_ea[2] << 1);
- stmp ^= (u16)hash_ea[3] | (((u16)hash_ea[4] & 1) << 8);
- hashResult |= stmp;
- } else {
- return -1; // don't support hash mode 1
- }
-
- dbg(3, "%s: hashResult=%x\n", __FUNCTION__, hashResult);
-
- tblEntryAddr =
- (u32 *)(&gp->hash_table[((u32)hashResult & 0x7ff) << 3]);
-
- dbg(3, "%s: tblEntryAddr=%p\n", tblEntryAddr, __FUNCTION__);
-
- for (i=0; i<HASH_HOP_NUMBER; i++) {
- if ((*tblEntryAddr & hteValid) &&
- !(*tblEntryAddr & hteSkip)) {
- // This entry is already occupied, go to next entry
- tblEntryAddr += 2;
- dbg(3, "%s: skipping to %p\n", __FUNCTION__,
- tblEntryAddr);
- } else {
- memset(tblEntryAddr, 0, 8);
- tblEntryAddr[1] = cpu_to_dma32(tblEntry1);
- tblEntryAddr[0] = cpu_to_dma32(tblEntry0);
- break;
- }
- }
-
- if (i >= HASH_HOP_NUMBER) {
- err("%s: expired!\n", __FUNCTION__);
- return -1; // Couldn't find an unused entry
- }
-
-#else
-
- tblEntryAddr = (u32 *)gp->hash_table;
- for (i=0; i<RX_HASH_TABLE_SIZE/4; i+=2) {
- tblEntryAddr[i+1] = cpu_to_dma32(tblEntry1);
- tblEntryAddr[i] = cpu_to_dma32(tblEntry0);
- }
-
-#endif
-
- return 0;
-}
-
-
-static void
-read_mib_counters(struct gt96100_private *gp)
-{
- u32* mib_regs = (u32*)&gp->mib;
- int i;
-
- for (i=0; i<sizeof(mib_counters_t)/sizeof(u32); i++)
- mib_regs[i] = GT96100ETH_READ(gp, GT96100_ETH_MIB_COUNT_BASE +
- i*sizeof(u32));
-}
-
-
-static void
-update_stats(struct gt96100_private *gp)
-{
- mib_counters_t *mib = &gp->mib;
- struct net_device_stats *stats = &gp->stats;
-
- read_mib_counters(gp);
-
- stats->rx_packets = mib->totalFramesReceived;
- stats->tx_packets = mib->framesSent;
- stats->rx_bytes = mib->totalByteReceived;
- stats->tx_bytes = mib->byteSent;
- stats->rx_errors = mib->totalFramesReceived - mib->framesReceived;
- //the tx error counters are incremented by the ISR
- //rx_dropped incremented by gt96100_rx
- //tx_dropped incremented by gt96100_tx
- stats->multicast = mib->multicastFramesReceived;
- // collisions incremented by gt96100_tx_complete
- stats->rx_length_errors = mib->oversizeFrames + mib->fragments;
- // The RxError condition means the Rx DMA encountered a
- // CPU owned descriptor, which, if things are working as
- // they should, means the Rx ring has overflowed.
- stats->rx_over_errors = mib->macRxError;
- stats->rx_crc_errors = mib->cRCError;
-}
-
-static void
-abort(struct net_device *dev, u32 abort_bits)
-{
- struct gt96100_private *gp = netdev_priv(dev);
- int timedout = 100; // wait up to 100 msec for hard stop to complete
-
- dbg(3, "%s\n", __FUNCTION__);
-
- // Return if neither Rx or Tx abort bits are set
- if (!(abort_bits & (sdcmrAR | sdcmrAT)))
- return;
-
- // make sure only the Rx/Tx abort bits are set
- abort_bits &= (sdcmrAR | sdcmrAT);
-
- spin_lock(&gp->lock);
-
- // abort any Rx/Tx DMA immediately
- GT96100ETH_WRITE(gp, GT96100_ETH_SDMA_COMM, abort_bits);
-
- dbg(3, "%s: SDMA comm = %x\n", __FUNCTION__,
- GT96100ETH_READ(gp, GT96100_ETH_SDMA_COMM));
-
- // wait for abort to complete
- while (GT96100ETH_READ(gp, GT96100_ETH_SDMA_COMM) & abort_bits) {
- // snooze for 1 msec and check again
- gt96100_delay(1);
-
- if (--timedout == 0) {
- err("%s: timeout!!\n", __FUNCTION__);
- break;
- }
- }
-
- spin_unlock(&gp->lock);
-}
-
-
-static void
-hard_stop(struct net_device *dev)
-{
- struct gt96100_private *gp = netdev_priv(dev);
-
- dbg(3, "%s\n", __FUNCTION__);
-
- disable_ether_irq(dev);
-
- abort(dev, sdcmrAR | sdcmrAT);
-
- // disable port
- GT96100ETH_WRITE(gp, GT96100_ETH_PORT_CONFIG, 0);
-}
-
-
-static void
-enable_ether_irq(struct net_device *dev)
-{
- struct gt96100_private *gp = netdev_priv(dev);
- u32 intMask;
- /*
- * route ethernet interrupt to GT_SERINT0 for port 0,
- * GT_INT0 for port 1.
- */
- int intr_mask_reg = (gp->port_num == 0) ?
- GT96100_SERINT0_MASK : GT96100_INT0_HIGH_MASK;
-
- if (gp->chip_rev >= REV_GT96100A_1) {
- intMask = icrTxBufferLow | icrTxEndLow |
- icrTxErrorLow | icrRxOVR | icrTxUdr |
- icrRxBufferQ0 | icrRxErrorQ0 |
- icrMIIPhySTC | icrEtherIntSum;
- }
- else {
- intMask = icrTxBufferLow | icrTxEndLow |
- icrTxErrorLow | icrRxOVR | icrTxUdr |
- icrRxBuffer | icrRxError |
- icrMIIPhySTC | icrEtherIntSum;
- }
-
- // unmask interrupts
- GT96100ETH_WRITE(gp, GT96100_ETH_INT_MASK, intMask);
-
- intMask = GT96100_READ(intr_mask_reg);
- intMask |= 1<<gp->port_num;
- GT96100_WRITE(intr_mask_reg, intMask);
-}
-
-static void
-disable_ether_irq(struct net_device *dev)
-{
- struct gt96100_private *gp = netdev_priv(dev);
- u32 intMask;
- int intr_mask_reg = (gp->port_num == 0) ?
- GT96100_SERINT0_MASK : GT96100_INT0_HIGH_MASK;
-
- intMask = GT96100_READ(intr_mask_reg);
- intMask &= ~(1<<gp->port_num);
- GT96100_WRITE(intr_mask_reg, intMask);
-
- GT96100ETH_WRITE(gp, GT96100_ETH_INT_MASK, 0);
-}
-
-
-/*
- * Init GT96100 ethernet controller driver
- */
-static int gt96100_init_module(void)
-{
- struct pci_dev *pci;
- int i, retval=0;
- u32 cpuConfig;
-
- /*
- * Stupid probe because this really isn't a PCI device
- */
- if (!(pci = pci_get_device(PCI_VENDOR_ID_MARVELL,
- PCI_DEVICE_ID_MARVELL_GT96100, NULL)) &&
- !(pci = pci_get_device(PCI_VENDOR_ID_MARVELL,
- PCI_DEVICE_ID_MARVELL_GT96100A, NULL))) {
- printk(KERN_ERR __FILE__ ": GT96100 not found!\n");
- return -ENODEV;
- }
-
- cpuConfig = GT96100_READ(GT96100_CPU_INTERF_CONFIG);
- if (cpuConfig & (1<<12)) {
- printk(KERN_ERR __FILE__
- ": must be in Big Endian mode!\n");
- return -ENODEV;
- }
-
- for (i=0; i < NUM_INTERFACES; i++)
- retval |= gt96100_probe1(pci, i);
-
- pci_dev_put(pci);
-
- return retval;
-}
-
-static int __init gt96100_probe1(struct pci_dev *pci, int port_num)
-{
- struct gt96100_private *gp = NULL;
- struct gt96100_if_t *gtif = >96100_iflist[port_num];
- int phy_addr, phy_id1, phy_id2;
- u32 phyAD;
- int retval;
- unsigned char chip_rev;
- struct net_device *dev = NULL;
-
- if (gtif->irq < 0) {
- printk(KERN_ERR "%s: irq unknown - probing not supported\n",
- __FUNCTION__);
- return -ENODEV;
- }
-
- pci_read_config_byte(pci, PCI_REVISION_ID, &chip_rev);
-
- if (chip_rev >= REV_GT96100A_1) {
- phyAD = GT96100_READ(GT96100_ETH_PHY_ADDR_REG);
- phy_addr = (phyAD >> (5*port_num)) & 0x1f;
- } else {
- /*
- * not sure what's this about -- probably a gt bug
- */
- phy_addr = port_num;
- phyAD = GT96100_READ(GT96100_ETH_PHY_ADDR_REG);
- phyAD &= ~(0x1f << (port_num*5));
- phyAD |= phy_addr << (port_num*5);
- GT96100_WRITE(GT96100_ETH_PHY_ADDR_REG, phyAD);
- }
-
- // probe for the external PHY
- if ((phy_id1 = read_MII(phy_addr, 2)) <= 0 ||
- (phy_id2 = read_MII(phy_addr, 3)) <= 0) {
- printk(KERN_ERR "%s: no PHY found on MII%d\n", __FUNCTION__, port_num);
- return -ENODEV;
- }
-
- if (!request_region(gtif->iobase, GT96100_ETH_IO_SIZE, "GT96100ETH")) {
- printk(KERN_ERR "%s: request_region failed\n", __FUNCTION__);
- return -EBUSY;
- }
-
- dev = alloc_etherdev(sizeof(struct gt96100_private));
- if (!dev)
- goto out;
- gtif->dev = dev;
-
- /* private struct aligned and zeroed by alloc_etherdev */
- /* Fill in the 'dev' fields. */
- dev->base_addr = gtif->iobase;
- dev->irq = gtif->irq;
-
- if ((retval = parse_mac_addr(dev, gtif->mac_str))) {
- err("%s: MAC address parse failed\n", __FUNCTION__);
- retval = -EINVAL;
- goto out1;
- }
-
- gp = netdev_priv(dev);
-
- memset(gp, 0, sizeof(*gp)); // clear it
-
- gp->port_num = port_num;
- gp->port_offset = port_num * GT96100_ETH_IO_SIZE;
- gp->phy_addr = phy_addr;
- gp->chip_rev = chip_rev;
-
- info("%s found at 0x%x, irq %d\n",
- chip_name(gp->chip_rev), gtif->iobase, gtif->irq);
- dump_hw_addr(0, dev, "%s: HW Address ", __FUNCTION__, dev->dev_addr);
- info("%s chip revision=%d\n", chip_name(gp->chip_rev), gp->chip_rev);
- info("%s ethernet port %d\n", chip_name(gp->chip_rev), gp->port_num);
- info("external PHY ID1=0x%04x, ID2=0x%04x\n", phy_id1, phy_id2);
-
- // Allocate Rx and Tx descriptor rings
- if (gp->rx_ring == NULL) {
- // All descriptors in ring must be 16-byte aligned
- gp->rx_ring = dmaalloc(sizeof(gt96100_rd_t) * RX_RING_SIZE
- + sizeof(gt96100_td_t) * TX_RING_SIZE,
- &gp->rx_ring_dma);
- if (gp->rx_ring == NULL) {
- retval = -ENOMEM;
- goto out1;
- }
-
- gp->tx_ring = (gt96100_td_t *)(gp->rx_ring + RX_RING_SIZE);
- gp->tx_ring_dma =
- gp->rx_ring_dma + sizeof(gt96100_rd_t) * RX_RING_SIZE;
- }
-
- // Allocate the Rx Data Buffers
- if (gp->rx_buff == NULL) {
- gp->rx_buff = dmaalloc(PKT_BUF_SZ*RX_RING_SIZE,
- &gp->rx_buff_dma);
- if (gp->rx_buff == NULL) {
- retval = -ENOMEM;
- goto out2;
- }
- }
-
- dbg(3, "%s: rx_ring=%p, tx_ring=%p\n", __FUNCTION__,
- gp->rx_ring, gp->tx_ring);
-
- // Allocate Rx Hash Table
- if (gp->hash_table == NULL) {
- gp->hash_table = (char*)dmaalloc(RX_HASH_TABLE_SIZE,
- &gp->hash_table_dma);
- if (gp->hash_table == NULL) {
- retval = -ENOMEM;
- goto out3;
- }
- }
-
- dbg(3, "%s: hash=%p\n", __FUNCTION__, gp->hash_table);
-
- spin_lock_init(&gp->lock);
-
- dev->open = gt96100_open;
- dev->hard_start_xmit = gt96100_tx;
- dev->stop = gt96100_close;
- dev->get_stats = gt96100_get_stats;
- //dev->do_ioctl = gt96100_ioctl;
- dev->set_multicast_list = gt96100_set_rx_mode;
- dev->tx_timeout = gt96100_tx_timeout;
- dev->watchdog_timeo = GT96100ETH_TX_TIMEOUT;
-
- retval = register_netdev(dev);
- if (retval)
- goto out4;
- return 0;
-
-out4:
- dmafree(RX_HASH_TABLE_SIZE, gp->hash_table_dma);
-out3:
- dmafree(PKT_BUF_SZ*RX_RING_SIZE, gp->rx_buff);
-out2:
- dmafree(sizeof(gt96100_rd_t) * RX_RING_SIZE
- + sizeof(gt96100_td_t) * TX_RING_SIZE,
- gp->rx_ring);
-out1:
- free_netdev (dev);
-out:
- release_region(gtif->iobase, GT96100_ETH_IO_SIZE);
-
- err("%s failed. Returns %d\n", __FUNCTION__, retval);
- return retval;
-}
-
-
-static void
-reset_tx(struct net_device *dev)
-{
- struct gt96100_private *gp = netdev_priv(dev);
- int i;
-
- abort(dev, sdcmrAT);
-
- for (i=0; i<TX_RING_SIZE; i++) {
- if (gp->tx_skbuff[i]) {
- if (in_interrupt())
- dev_kfree_skb_irq(gp->tx_skbuff[i]);
- else
- dev_kfree_skb(gp->tx_skbuff[i]);
- gp->tx_skbuff[i] = NULL;
- }
-
- gp->tx_ring[i].cmdstat = 0; // CPU owns
- gp->tx_ring[i].byte_cnt = 0;
- gp->tx_ring[i].buff_ptr = 0;
- gp->tx_ring[i].next =
- cpu_to_dma32(gp->tx_ring_dma +
- sizeof(gt96100_td_t) * (i+1));
- dump_tx_desc(4, dev, i);
- }
- /* Wrap the ring. */
- gp->tx_ring[i-1].next = cpu_to_dma32(gp->tx_ring_dma);
-
- // setup only the lowest priority TxCDP reg
- GT96100ETH_WRITE(gp, GT96100_ETH_CURR_TX_DESC_PTR0, gp->tx_ring_dma);
- GT96100ETH_WRITE(gp, GT96100_ETH_CURR_TX_DESC_PTR1, 0);
-
- // init Tx indeces and pkt counter
- gp->tx_next_in = gp->tx_next_out = 0;
- gp->tx_count = 0;
-
-}
-
-static void
-reset_rx(struct net_device *dev)
-{
- struct gt96100_private *gp = netdev_priv(dev);
- int i;
-
- abort(dev, sdcmrAR);
-
- for (i=0; i<RX_RING_SIZE; i++) {
- gp->rx_ring[i].next =
- cpu_to_dma32(gp->rx_ring_dma +
- sizeof(gt96100_rd_t) * (i+1));
- gp->rx_ring[i].buff_ptr =
- cpu_to_dma32(gp->rx_buff_dma + i*PKT_BUF_SZ);
- gp->rx_ring[i].buff_sz = cpu_to_dma16(PKT_BUF_SZ);
- // Give ownership to device, set first and last, enable intr
- gp->rx_ring[i].cmdstat =
- cpu_to_dma32((u32)(rxFirst | rxLast | rxOwn | rxEI));
- dump_rx_desc(4, dev, i);
- }
- /* Wrap the ring. */
- gp->rx_ring[i-1].next = cpu_to_dma32(gp->rx_ring_dma);
-
- // Setup only the lowest priority RxFDP and RxCDP regs
- for (i=0; i<4; i++) {
- if (i == 0) {
- GT96100ETH_WRITE(gp, GT96100_ETH_1ST_RX_DESC_PTR0,
- gp->rx_ring_dma);
- GT96100ETH_WRITE(gp, GT96100_ETH_CURR_RX_DESC_PTR0,
- gp->rx_ring_dma);
- } else {
- GT96100ETH_WRITE(gp,
- GT96100_ETH_1ST_RX_DESC_PTR0 + i*4,
- 0);
- GT96100ETH_WRITE(gp,
- GT96100_ETH_CURR_RX_DESC_PTR0 + i*4,
- 0);
- }
- }
-
- // init Rx NextOut index
- gp->rx_next_out = 0;
-}
-
-
-// Returns 1 if the Tx counter and indeces don't gel
-static int
-gt96100_check_tx_consistent(struct gt96100_private *gp)
-{
- int diff = gp->tx_next_in - gp->tx_next_out;
-
- diff = diff<0 ? TX_RING_SIZE + diff : diff;
- diff = gp->tx_count == TX_RING_SIZE ? diff + TX_RING_SIZE : diff;
-
- return (diff != gp->tx_count);
-}
-
-static int
-gt96100_init(struct net_device *dev)
-{
- struct gt96100_private *gp = netdev_priv(dev);
- u32 tmp;
- u16 mii_reg;
-
- dbg(3, "%s: dev=%p\n", __FUNCTION__, dev);
- dbg(3, "%s: scs10_lo=%4x, scs10_hi=%4x\n", __FUNCTION__,
- GT96100_READ(0x8), GT96100_READ(0x10));
- dbg(3, "%s: scs32_lo=%4x, scs32_hi=%4x\n", __FUNCTION__,
- GT96100_READ(0x18), GT96100_READ(0x20));
-
- // Stop and disable Port
- hard_stop(dev);
-
- // Setup CIU Arbiter
- tmp = GT96100_READ(GT96100_CIU_ARBITER_CONFIG);
- tmp |= (0x0c << (gp->port_num*2)); // set Ether DMA req priority to hi
-#ifndef DESC_BE
- tmp &= ~(1<<31); // set desc endianess to little
-#else
- tmp |= (1<<31);
-#endif
- GT96100_WRITE(GT96100_CIU_ARBITER_CONFIG, tmp);
- dbg(3, "%s: CIU Config=%x/%x\n", __FUNCTION__,
- tmp, GT96100_READ(GT96100_CIU_ARBITER_CONFIG));
-
- // Set routing.
- tmp = GT96100_READ(GT96100_ROUTE_MAIN) & (0x3f << 18);
- tmp |= (0x07 << (18 + gp->port_num*3));
- GT96100_WRITE(GT96100_ROUTE_MAIN, tmp);
-
- /* set MII as peripheral func */
- tmp = GT96100_READ(GT96100_GPP_CONFIG2);
- tmp |= 0x7fff << (gp->port_num*16);
- GT96100_WRITE(GT96100_GPP_CONFIG2, tmp);
-
- /* Set up MII port pin directions */
- tmp = GT96100_READ(GT96100_GPP_IO2);
- tmp |= 0x003d << (gp->port_num*16);
- GT96100_WRITE(GT96100_GPP_IO2, tmp);
-
- // Set-up hash table
- memset(gp->hash_table, 0, RX_HASH_TABLE_SIZE); // clear it
- gp->hash_mode = 0;
- // Add a single entry to hash table - our ethernet address
- gt96100_add_hash_entry(dev, dev->dev_addr);
- // Set-up DMA ptr to hash table
- GT96100ETH_WRITE(gp, GT96100_ETH_HASH_TBL_PTR, gp->hash_table_dma);
- dbg(3, "%s: Hash Tbl Ptr=%x\n", __FUNCTION__,
- GT96100ETH_READ(gp, GT96100_ETH_HASH_TBL_PTR));
-
- // Setup Tx
- reset_tx(dev);
-
- dbg(3, "%s: Curr Tx Desc Ptr0=%x\n", __FUNCTION__,
- GT96100ETH_READ(gp, GT96100_ETH_CURR_TX_DESC_PTR0));
-
- // Setup Rx
- reset_rx(dev);
-
- dbg(3, "%s: 1st/Curr Rx Desc Ptr0=%x/%x\n", __FUNCTION__,
- GT96100ETH_READ(gp, GT96100_ETH_1ST_RX_DESC_PTR0),
- GT96100ETH_READ(gp, GT96100_ETH_CURR_RX_DESC_PTR0));
-
- // eth port config register
- GT96100ETH_WRITE(gp, GT96100_ETH_PORT_CONFIG_EXT,
- pcxrFCTL | pcxrFCTLen | pcxrFLP | pcxrDPLXen);
-
- mii_reg = read_MII(gp->phy_addr, 0x11); /* int enable register */
- mii_reg |= 2; /* enable mii interrupt */
- write_MII(gp->phy_addr, 0x11, mii_reg);
-
- dbg(3, "%s: PhyAD=%x\n", __FUNCTION__,
- GT96100_READ(GT96100_ETH_PHY_ADDR_REG));
-
- // setup DMA
-
- // We want the Rx/Tx DMA to write/read data to/from memory in
- // Big Endian mode. Also set DMA Burst Size to 8 64Bit words.
-#ifdef DESC_DATA_BE
- GT96100ETH_WRITE(gp, GT96100_ETH_SDMA_CONFIG,
- (0xf<<sdcrRCBit) | sdcrRIFB | (3<<sdcrBSZBit));
-#else
- GT96100ETH_WRITE(gp, GT96100_ETH_SDMA_CONFIG,
- sdcrBLMR | sdcrBLMT |
- (0xf<<sdcrRCBit) | sdcrRIFB | (3<<sdcrBSZBit));
-#endif
- dbg(3, "%s: SDMA Config=%x\n", __FUNCTION__,
- GT96100ETH_READ(gp, GT96100_ETH_SDMA_CONFIG));
-
- // start Rx DMA
- GT96100ETH_WRITE(gp, GT96100_ETH_SDMA_COMM, sdcmrERD);
- dbg(3, "%s: SDMA Comm=%x\n", __FUNCTION__,
- GT96100ETH_READ(gp, GT96100_ETH_SDMA_COMM));
-
- // enable this port (set hash size to 1/2K)
- GT96100ETH_WRITE(gp, GT96100_ETH_PORT_CONFIG, pcrEN | pcrHS);
- dbg(3, "%s: Port Config=%x\n", __FUNCTION__,
- GT96100ETH_READ(gp, GT96100_ETH_PORT_CONFIG));
-
- /*
- * Disable all Type-of-Service queueing. All Rx packets will be
- * treated normally and will be sent to the lowest priority
- * queue.
- *
- * Disable flow-control for now. FIXME: support flow control?
- */
-
- // clear all the MIB ctr regs
- GT96100ETH_WRITE(gp, GT96100_ETH_PORT_CONFIG_EXT,
- pcxrFCTL | pcxrFCTLen | pcxrFLP |
- pcxrPRIOrxOverride);
- read_mib_counters(gp);
- GT96100ETH_WRITE(gp, GT96100_ETH_PORT_CONFIG_EXT,
- pcxrFCTL | pcxrFCTLen | pcxrFLP |
- pcxrPRIOrxOverride | pcxrMIBclrMode);
-
- dbg(3, "%s: Port Config Ext=%x\n", __FUNCTION__,
- GT96100ETH_READ(gp, GT96100_ETH_PORT_CONFIG_EXT));
-
- netif_start_queue(dev);
-
- dump_MII(4, dev);
-
- // enable interrupts
- enable_ether_irq(dev);
-
- // we should now be receiving frames
- return 0;
-}
-
-
-static int
-gt96100_open(struct net_device *dev)
-{
- int retval;
-
- dbg(2, "%s: dev=%p\n", __FUNCTION__, dev);
-
- // Initialize and startup the GT-96100 ethernet port
- if ((retval = gt96100_init(dev))) {
- err("error in gt96100_init\n");
- free_irq(dev->irq, dev);
- return retval;
- }
-
- if ((retval = request_irq(dev->irq, >96100_interrupt,
- IRQF_SHARED, dev->name, dev))) {
- err("unable to get IRQ %d\n", dev->irq);
- return retval;
- }
-
- dbg(2, "%s: Initialization done.\n", __FUNCTION__);
-
- return 0;
-}
-
-static int
-gt96100_close(struct net_device *dev)
-{
- dbg(3, "%s: dev=%p\n", __FUNCTION__, dev);
-
- // stop the device
- if (netif_device_present(dev)) {
- netif_stop_queue(dev);
- hard_stop(dev);
- }
-
- free_irq(dev->irq, dev);
-
- return 0;
-}
-
-
-static int
-gt96100_tx(struct sk_buff *skb, struct net_device *dev)
-{
- struct gt96100_private *gp = netdev_priv(dev);
- unsigned long flags;
- int nextIn;
-
- spin_lock_irqsave(&gp->lock, flags);
-
- nextIn = gp->tx_next_in;
-
- dbg(3, "%s: nextIn=%d\n", __FUNCTION__, nextIn);
-
- if (gp->tx_count >= TX_RING_SIZE) {
- warn("Tx Ring full, pkt dropped.\n");
- gp->stats.tx_dropped++;
- spin_unlock_irqrestore(&gp->lock, flags);
- return 1;
- }
-
- if (!(gp->last_psr & psrLink)) {
- err("%s: Link down, pkt dropped.\n", __FUNCTION__);
- gp->stats.tx_dropped++;
- spin_unlock_irqrestore(&gp->lock, flags);
- return 1;
- }
-
- if (dma32_to_cpu(gp->tx_ring[nextIn].cmdstat) & txOwn) {
- err("%s: device owns descriptor, pkt dropped.\n", __FUNCTION__);
- gp->stats.tx_dropped++;
- // stop the queue, so Tx timeout can fix it
- netif_stop_queue(dev);
- spin_unlock_irqrestore(&gp->lock, flags);
- return 1;
- }
-
- // Prepare the Descriptor at tx_next_in
- gp->tx_skbuff[nextIn] = skb;
- gp->tx_ring[nextIn].byte_cnt = cpu_to_dma16(skb->len);
- gp->tx_ring[nextIn].buff_ptr = cpu_to_dma32(virt_to_phys(skb->data));
- // make sure packet gets written back to memory
- dma_cache_wback_inv((unsigned long)(skb->data), skb->len);
- // Give ownership to device, set first and last desc, enable interrupt
- // Setting of ownership bit must be *last*!
- gp->tx_ring[nextIn].cmdstat =
- cpu_to_dma32((u32)(txOwn | txGenCRC | txEI |
- txPad | txFirst | txLast));
-
- dump_tx_desc(4, dev, nextIn);
- dump_skb(4, dev, skb);
-
- // increment tx_next_in with wrap
- gp->tx_next_in = (nextIn + 1) % TX_RING_SIZE;
- // If DMA is stopped, restart
- if (!(GT96100ETH_READ(gp, GT96100_ETH_PORT_STATUS) & psrTxLow))
- GT96100ETH_WRITE(gp, GT96100_ETH_SDMA_COMM,
- sdcmrERD | sdcmrTXDL);
-
- // increment count and stop queue if full
- if (++gp->tx_count == TX_RING_SIZE) {
- gp->tx_full = 1;
- netif_stop_queue(dev);
- dbg(2, "Tx Ring now full, queue stopped.\n");
- }
-
- dev->trans_start = jiffies;
- spin_unlock_irqrestore(&gp->lock, flags);
-
- return 0;
-}
-
-
-static int
-gt96100_rx(struct net_device *dev, u32 status)
-{
- struct gt96100_private *gp = netdev_priv(dev);
- struct sk_buff *skb;
- int pkt_len, nextOut, cdp;
- gt96100_rd_t *rd;
- u32 cmdstat;
-
- dbg(3, "%s: dev=%p, status=%x\n", __FUNCTION__, dev, status);
-
- cdp = (GT96100ETH_READ(gp, GT96100_ETH_1ST_RX_DESC_PTR0)
- - gp->rx_ring_dma) / sizeof(gt96100_rd_t);
-
- // Continue until we reach 1st descriptor pointer
- for (nextOut = gp->rx_next_out; nextOut != cdp;
- nextOut = (nextOut + 1) % RX_RING_SIZE) {
-
- if (--gp->intr_work_done == 0)
- break;
-
- rd = &gp->rx_ring[nextOut];
- cmdstat = dma32_to_cpu(rd->cmdstat);
-
- dbg(4, "%s: Rx desc cmdstat=%x, nextOut=%d\n", __FUNCTION__,
- cmdstat, nextOut);
-
- if (cmdstat & (u32)rxOwn) {
- //err("%s: device owns descriptor!\n", __FUNCTION__);
- // DMA is not finished updating descriptor???
- // Leave and come back later to pick-up where
- // we left off.
- break;
- }
-
- // Drop this received pkt if there were any errors
- if (((cmdstat & (u32)(rxErrorSummary)) &&
- (cmdstat & (u32)(rxFirst))) || (status & icrRxError)) {
- // update the detailed rx error counters that
- // are not covered by the MIB counters.
- if (cmdstat & (u32)rxOverrun)
- gp->stats.rx_fifo_errors++;
- cmdstat |= (u32)rxOwn;
- rd->cmdstat = cpu_to_dma32(cmdstat);
- continue;
- }
-
- /*
- * Must be first and last (ie only) descriptor of packet. We
- * ignore (drop) any packets that do not fit in one descriptor.
- * Every descriptor's receive buffer is large enough to hold
- * the maximum 802.3 frame size, so a multi-descriptor packet
- * indicates an error. Most if not all corrupted packets will
- * have already been dropped by the above check for the
- * rxErrorSummary status bit.
- */
- if (!(cmdstat & (u32)rxFirst) || !(cmdstat & (u32)rxLast)) {
- if (cmdstat & (u32)rxFirst) {
- /*
- * This is the first descriptor of a
- * multi-descriptor packet. It isn't corrupted
- * because the above check for rxErrorSummary
- * would have dropped it already, so what's
- * the deal with this packet? Good question,
- * let's dump it out.
- */
- err("%s: desc not first and last!\n", __FUNCTION__);
- dump_rx_desc(0, dev, nextOut);
- }
- cmdstat |= (u32)rxOwn;
- rd->cmdstat = cpu_to_dma32(cmdstat);
- // continue to drop every descriptor of this packet
- continue;
- }
-
- pkt_len = dma16_to_cpu(rd->byte_cnt);
-
- /* Create new skb. */
- skb = dev_alloc_skb(pkt_len+2);
- if (skb == NULL) {
- err("%s: Memory squeeze, dropping packet.\n", __FUNCTION__);
- gp->stats.rx_dropped++;
- cmdstat |= (u32)rxOwn;
- rd->cmdstat = cpu_to_dma32(cmdstat);
- continue;
- }
- skb->dev = dev;
- skb_reserve(skb, 2); /* 16 byte IP header align */
- memcpy(skb_put(skb, pkt_len),
- &gp->rx_buff[nextOut*PKT_BUF_SZ], pkt_len);
- skb->protocol = eth_type_trans(skb, dev);
- dump_skb(4, dev, skb);
-
- netif_rx(skb); /* pass the packet to upper layers */
- dev->last_rx = jiffies;
-
- // now we can release ownership of this desc back to device
- cmdstat |= (u32)rxOwn;
- rd->cmdstat = cpu_to_dma32(cmdstat);
- }
-
- if (nextOut == gp->rx_next_out)
- dbg(3, "%s: RxCDP did not increment?\n", __FUNCTION__);
-
- gp->rx_next_out = nextOut;
- return 0;
-}
-
-
-static void
-gt96100_tx_complete(struct net_device *dev, u32 status)
-{
- struct gt96100_private *gp = netdev_priv(dev);
- int nextOut, cdp;
- gt96100_td_t *td;
- u32 cmdstat;
-
- cdp = (GT96100ETH_READ(gp, GT96100_ETH_CURR_TX_DESC_PTR0)
- - gp->tx_ring_dma) / sizeof(gt96100_td_t);
-
- // Continue until we reach the current descriptor pointer
- for (nextOut = gp->tx_next_out; nextOut != cdp;
- nextOut = (nextOut + 1) % TX_RING_SIZE) {
-
- if (--gp->intr_work_done == 0)
- break;
-
- td = &gp->tx_ring[nextOut];
- cmdstat = dma32_to_cpu(td->cmdstat);
-
- dbg(3, "%s: Tx desc cmdstat=%x, nextOut=%d\n", __FUNCTION__,
- cmdstat, nextOut);
-
- if (cmdstat & (u32)txOwn) {
- /*
- * DMA is not finished writing descriptor???
- * Leave and come back later to pick-up where
- * we left off.
- */
- break;
- }
-
- // increment Tx error stats
- if (cmdstat & (u32)txErrorSummary) {
- dbg(2, "%s: Tx error, cmdstat = %x\n", __FUNCTION__,
- cmdstat);
- gp->stats.tx_errors++;
- if (cmdstat & (u32)txReTxLimit)
- gp->stats.tx_aborted_errors++;
- if (cmdstat & (u32)txUnderrun)
- gp->stats.tx_fifo_errors++;
- if (cmdstat & (u32)txLateCollision)
- gp->stats.tx_window_errors++;
- }
-
- if (cmdstat & (u32)txCollision)
- gp->stats.collisions +=
- (u32)((cmdstat & txReTxCntMask) >>
- txReTxCntBit);
-
- // Wake the queue if the ring was full
- if (gp->tx_full) {
- gp->tx_full = 0;
- if (gp->last_psr & psrLink) {
- netif_wake_queue(dev);
- dbg(2, "%s: Tx Ring was full, queue waked\n",
- __FUNCTION__);
- }
- }
-
- // decrement tx ring buffer count
- if (gp->tx_count) gp->tx_count--;
-
- // free the skb
- if (gp->tx_skbuff[nextOut]) {
- dbg(3, "%s: good Tx, skb=%p\n", __FUNCTION__,
- gp->tx_skbuff[nextOut]);
- dev_kfree_skb_irq(gp->tx_skbuff[nextOut]);
- gp->tx_skbuff[nextOut] = NULL;
- } else {
- err("%s: no skb!\n", __FUNCTION__);
- }
- }
-
- gp->tx_next_out = nextOut;
-
- if (gt96100_check_tx_consistent(gp)) {
- err("%s: Tx queue inconsistent!\n", __FUNCTION__);
- }
-
- if ((status & icrTxEndLow) && gp->tx_count != 0) {
- // we must restart the DMA
- dbg(3, "%s: Restarting Tx DMA\n", __FUNCTION__);
- GT96100ETH_WRITE(gp, GT96100_ETH_SDMA_COMM,
- sdcmrERD | sdcmrTXDL);
- }
-}
-
-
-static irqreturn_t
-gt96100_interrupt(int irq, void *dev_id, struct pt_regs *regs)
-{
- struct net_device *dev = (struct net_device *)dev_id;
- struct gt96100_private *gp = netdev_priv(dev);
- u32 status;
- int handled = 0;
-
- if (dev == NULL) {
- err("%s: null dev ptr\n", __FUNCTION__);
- return IRQ_NONE;
- }
-
- dbg(3, "%s: entry, icr=%x\n", __FUNCTION__,
- GT96100ETH_READ(gp, GT96100_ETH_INT_CAUSE));
-
- spin_lock(&gp->lock);
-
- gp->intr_work_done = max_interrupt_work;
-
- while (gp->intr_work_done > 0) {
-
- status = GT96100ETH_READ(gp, GT96100_ETH_INT_CAUSE);
- // ACK interrupts
- GT96100ETH_WRITE(gp, GT96100_ETH_INT_CAUSE, ~status);
-
- if ((status & icrEtherIntSum) == 0 &&
- !(status & (icrTxBufferLow|icrTxBufferHigh|icrRxBuffer)))
- break;
-
- handled = 1;
-
- if (status & icrMIIPhySTC) {
- u32 psr = GT96100ETH_READ(gp, GT96100_ETH_PORT_STATUS);
- if (gp->last_psr != psr) {
- dbg(0, "port status:\n");
- dbg(0, " %s MBit/s, %s-duplex, "
- "flow-control %s, link is %s,\n",
- psr & psrSpeed ? "100":"10",
- psr & psrDuplex ? "full":"half",
- psr & psrFctl ? "disabled":"enabled",
- psr & psrLink ? "up":"down");
- dbg(0, " TxLowQ is %s, TxHighQ is %s, "
- "Transmitter is %s\n",
- psr & psrTxLow ? "running":"stopped",
- psr & psrTxHigh ? "running":"stopped",
- psr & psrTxInProg ? "on":"off");
-
- if ((psr & psrLink) && !gp->tx_full &&
- netif_queue_stopped(dev)) {
- dbg(0, "%s: Link up, waking queue.\n",
- __FUNCTION__);
- netif_wake_queue(dev);
- } else if (!(psr & psrLink) &&
- !netif_queue_stopped(dev)) {
- dbg(0, "%s: Link down, stopping queue.\n",
- __FUNCTION__);
- netif_stop_queue(dev);
- }
-
- gp->last_psr = psr;
- }
-
- if (--gp->intr_work_done == 0)
- break;
- }
-
- if (status & (icrTxBufferLow | icrTxEndLow))
- gt96100_tx_complete(dev, status);
-
- if (status & (icrRxBuffer | icrRxError)) {
- gt96100_rx(dev, status);
- }
-
- // Now check TX errors (RX errors were handled in gt96100_rx)
- if (status & icrTxErrorLow) {
- err("%s: Tx resource error\n", __FUNCTION__);
- if (--gp->intr_work_done == 0)
- break;
- }
-
- if (status & icrTxUdr) {
- err("%s: Tx underrun error\n", __FUNCTION__);
- if (--gp->intr_work_done == 0)
- break;
- }
- }
-
- if (gp->intr_work_done == 0) {
- // ACK any remaining pending interrupts
- GT96100ETH_WRITE(gp, GT96100_ETH_INT_CAUSE, 0);
- dbg(3, "%s: hit max work\n", __FUNCTION__);
- }
-
- dbg(3, "%s: exit, icr=%x\n", __FUNCTION__,
- GT96100ETH_READ(gp, GT96100_ETH_INT_CAUSE));
-
- spin_unlock(&gp->lock);
- return IRQ_RETVAL(handled);
-}
-
-
-static void
-gt96100_tx_timeout(struct net_device *dev)
-{
- struct gt96100_private *gp = netdev_priv(dev);
- unsigned long flags;
-
- spin_lock_irqsave(&gp->lock, flags);
-
- if (!(gp->last_psr & psrLink)) {
- err("tx_timeout: link down.\n");
- spin_unlock_irqrestore(&gp->lock, flags);
- } else {
- if (gt96100_check_tx_consistent(gp))
- err("tx_timeout: Tx ring error.\n");
-
- disable_ether_irq(dev);
- spin_unlock_irqrestore(&gp->lock, flags);
- reset_tx(dev);
- enable_ether_irq(dev);
-
- netif_wake_queue(dev);
- }
-}
-
-
-static void
-gt96100_set_rx_mode(struct net_device *dev)
-{
- struct gt96100_private *gp = netdev_priv(dev);
- unsigned long flags;
- //struct dev_mc_list *mcptr;
-
- dbg(3, "%s: dev=%p, flags=%x\n", __FUNCTION__, dev, dev->flags);
-
- // stop the Receiver DMA
- abort(dev, sdcmrAR);
-
- spin_lock_irqsave(&gp->lock, flags);
-
- if (dev->flags & IFF_PROMISC) {
- GT96100ETH_WRITE(gp, GT96100_ETH_PORT_CONFIG,
- pcrEN | pcrHS | pcrPM);
- }
-
-#if 0
- /*
- FIXME: currently multicast doesn't work - need to get hash table
- working first.
- */
- if (dev->mc_count) {
- // clear hash table
- memset(gp->hash_table, 0, RX_HASH_TABLE_SIZE);
- // Add our ethernet address
- gt96100_add_hash_entry(dev, dev->dev_addr);
-
- for (mcptr = dev->mc_list; mcptr; mcptr = mcptr->next) {
- dump_hw_addr(2, dev, "%s: addr=", __FUNCTION__,
- mcptr->dmi_addr);
- gt96100_add_hash_entry(dev, mcptr->dmi_addr);
- }
- }
-#endif
-
- // restart Rx DMA
- GT96100ETH_WRITE(gp, GT96100_ETH_SDMA_COMM, sdcmrERD);
-
- spin_unlock_irqrestore(&gp->lock, flags);
-}
-
-static struct net_device_stats *
-gt96100_get_stats(struct net_device *dev)
-{
- struct gt96100_private *gp = netdev_priv(dev);
- unsigned long flags;
-
- dbg(3, "%s: dev=%p\n", __FUNCTION__, dev);
-
- if (netif_device_present(dev)) {
- spin_lock_irqsave (&gp->lock, flags);
- update_stats(gp);
- spin_unlock_irqrestore (&gp->lock, flags);
- }
-
- return &gp->stats;
-}
-
-static void gt96100_cleanup_module(void)
-{
- int i;
- for (i=0; i<NUM_INTERFACES; i++) {
- struct gt96100_if_t *gtif = >96100_iflist[i];
- if (gtif->dev != NULL) {
- struct gt96100_private *gp = (struct gt96100_private *)
- netdev_priv(gtif->dev);
- unregister_netdev(gtif->dev);
- dmafree(RX_HASH_TABLE_SIZE, gp->hash_table_dma);
- dmafree(PKT_BUF_SZ*RX_RING_SIZE, gp->rx_buff);
- dmafree(sizeof(gt96100_rd_t) * RX_RING_SIZE
- + sizeof(gt96100_td_t) * TX_RING_SIZE,
- gp->rx_ring);
- free_netdev(gtif->dev);
- release_region(gtif->iobase, GT96100_ETH_IO_SIZE);
- }
- }
-}
-
-static int __init gt96100_setup(char *options)
-{
- char *this_opt;
-
- if (!options || !*options)
- return 0;
-
- while ((this_opt = strsep (&options, ",")) != NULL) {
- if (!*this_opt)
- continue;
- if (!strncmp(this_opt, "mac0:", 5)) {
- memcpy(mac0, this_opt+5, 17);
- mac0[17]= '\0';
- } else if (!strncmp(this_opt, "mac1:", 5)) {
- memcpy(mac1, this_opt+5, 17);
- mac1[17]= '\0';
- }
- }
-
- return 1;
-}
-
-__setup("gt96100eth=", gt96100_setup);
-
-module_init(gt96100_init_module);
-module_exit(gt96100_cleanup_module);
-
-MODULE_AUTHOR("Steve Longerbeam <stevel@mvista.com>");
-MODULE_DESCRIPTION("GT96100 Ethernet driver");
projects / GitHub / LineageOS / G12 / android_kernel_amlogic_linux-4.9.git / commitdiff