3 drivers/net/pci-skeleton.c
5 Maintained by Jeff Garzik <jgarzik@pobox.com>
7 Original code came from 8139too.c, which in turns was based
8 originally on Donald Becker's rtl8139.c driver, versions 1.11
9 and older. This driver was originally based on rtl8139.c
10 version 1.07. Header of rtl8139.c version 1.11:
14 Written 1997-2000 by Donald Becker.
15 This software may be used and distributed according to the
16 terms of the GNU General Public License (GPL), incorporated
17 herein by reference. Drivers based on or derived from this
18 code fall under the GPL and must retain the authorship,
19 copyright and license notice. This file is not a complete
20 program and may only be used when the entire operating
21 system is licensed under the GPL.
23 This driver is for boards based on the RTL8129 and RTL8139
26 The author may be reached as becker@scyld.com, or C/O Scyld
27 Computing Corporation 410 Severn Ave., Suite 210 Annapolis
30 Support and updates available at
31 http://www.scyld.com/network/rtl8139.html
33 Twister-tuning table provided by Kinston
34 <shangh@realtek.com.tw>.
38 This software may be used and distributed according to the terms
39 of the GNU General Public License, incorporated herein by reference.
42 -----------------------------------------------------------------------------
46 I. Board Compatibility
48 This device driver is designed for the RealTek RTL8139 series, the RealTek
49 Fast Ethernet controllers for PCI and CardBus. This chip is used on many
50 low-end boards, sometimes with its markings changed.
53 II. Board-specific settings
55 PCI bus devices are configured by the system at boot time, so no jumpers
56 need to be set on the board. The system BIOS will assign the
57 PCI INTA signal to a (preferably otherwise unused) system IRQ line.
63 The receive unit uses a single linear ring buffer rather than the more
64 common (and more efficient) descriptor-based architecture. Incoming frames
65 are sequentially stored into the Rx region, and the host copies them into
68 Comment: While it is theoretically possible to process many frames in place,
69 any delay in Rx processing would cause us to drop frames. More importantly,
70 the Linux protocol stack is not designed to operate in this manner.
74 The RTL8139 uses a fixed set of four Tx descriptors in register space.
75 In a stunningly bad design choice, Tx frames must be 32 bit aligned. Linux
76 aligns the IP header on word boundaries, and 14 byte ethernet header means
77 that almost all frames will need to be copied to an alignment buffer.
81 http://www.realtek.com.tw/cn/cn.html
82 http://www.scyld.com/expert/NWay.html
88 #include <linux/module.h>
89 #include <linux/kernel.h>
90 #include <linux/pci.h>
91 #include <linux/init.h>
92 #include <linux/ioport.h>
93 #include <linux/netdevice.h>
94 #include <linux/etherdevice.h>
95 #include <linux/delay.h>
96 #include <linux/ethtool.h>
97 #include <linux/mii.h>
98 #include <linux/crc32.h>
101 #define NETDRV_VERSION "1.0.1"
102 #define MODNAME "netdrv"
103 #define NETDRV_DRIVER_LOAD_MSG "MyVendor Fast Ethernet driver " NETDRV_VERSION " loaded"
104 #define PFX MODNAME ": "
106 static char version[] __devinitdata =
107 KERN_INFO NETDRV_DRIVER_LOAD_MSG "\n"
108 KERN_INFO " Support available from http://foo.com/bar/baz.html\n";
110 /* define to 1 to enable PIO instead of MMIO */
113 /* define to 1 to enable copious debugging info */
116 /* define to 1 to disable lightweight runtime debugging checks */
121 /* note: prints function name for you */
122 # define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __FUNCTION__ , ## args)
124 # define DPRINTK(fmt, args...)
128 # define assert(expr) do {} while (0)
130 # define assert(expr) \
132 printk( "Assertion failed! %s,%s,%s,line=%d\n", \
133 #expr,__FILE__,__FUNCTION__,__LINE__); \
138 /* A few user-configurable values. */
140 static int media[] = {-1, -1, -1, -1, -1, -1, -1, -1};
142 /* Maximum events (Rx packets, etc.) to handle at each interrupt. */
143 static int max_interrupt_work = 20;
145 /* Maximum number of multicast addresses to filter (vs. Rx-all-multicast).
146 The RTL chips use a 64 element hash table based on the Ethernet CRC. */
147 static int multicast_filter_limit = 32;
149 /* Size of the in-memory receive ring. */
150 #define RX_BUF_LEN_IDX 2 /* 0==8K, 1==16K, 2==32K, 3==64K */
151 #define RX_BUF_LEN (8192 << RX_BUF_LEN_IDX)
152 #define RX_BUF_PAD 16
153 #define RX_BUF_WRAP_PAD 2048 /* spare padding to handle lack of packet wrap */
154 #define RX_BUF_TOT_LEN (RX_BUF_LEN + RX_BUF_PAD + RX_BUF_WRAP_PAD)
156 /* Number of Tx descriptor registers. */
157 #define NUM_TX_DESC 4
159 /* max supported ethernet frame size -- must be at least (dev->mtu+14+4).*/
160 #define MAX_ETH_FRAME_SIZE 1536
162 /* Size of the Tx bounce buffers -- must be at least (dev->mtu+14+4). */
163 #define TX_BUF_SIZE MAX_ETH_FRAME_SIZE
164 #define TX_BUF_TOT_LEN (TX_BUF_SIZE * NUM_TX_DESC)
166 /* PCI Tuning Parameters
167 Threshold is bytes transferred to chip before transmission starts. */
168 #define TX_FIFO_THRESH 256 /* In bytes, rounded down to 32 byte units. */
170 /* The following settings are log_2(bytes)-4: 0 == 16 bytes .. 6==1024, 7==end of packet. */
171 #define RX_FIFO_THRESH 6 /* Rx buffer level before first PCI xfer. */
172 #define RX_DMA_BURST 6 /* Maximum PCI burst, '6' is 1024 */
173 #define TX_DMA_BURST 6 /* Maximum PCI burst, '6' is 1024 */
176 /* Operational parameters that usually are not changed. */
177 /* Time in jiffies before concluding the transmitter is hung. */
178 #define TX_TIMEOUT (6*HZ)
182 HAS_CHIP_XCVR = 0x020000,
183 HAS_LNK_CHNG = 0x040000,
186 #define NETDRV_MIN_IO_SIZE 0x80
187 #define RTL8139B_IO_SIZE 256
189 #define NETDRV_CAPS HAS_CHIP_XCVR|HAS_LNK_CHNG
201 /* indexed by board_t, above */
204 } board_info[] __devinitdata = {
205 { "RealTek RTL8139 Fast Ethernet" },
206 { "RealTek RTL8139B PCI/CardBus" },
207 { "SMC1211TX EZCard 10/100 (RealTek RTL8139)" },
208 /* { MPX5030, "Accton MPX5030 (RealTek RTL8139)" },*/
209 { "Delta Electronics 8139 10/100BaseTX" },
210 { "Addtron Technolgy 8139 10/100BaseTX" },
214 static struct pci_device_id netdrv_pci_tbl[] = {
215 {0x10ec, 0x8139, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
216 {0x10ec, 0x8138, PCI_ANY_ID, PCI_ANY_ID, 0, 0, NETDRV_CB },
217 {0x1113, 0x1211, PCI_ANY_ID, PCI_ANY_ID, 0, 0, SMC1211TX },
218 /* {0x1113, 0x1211, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MPX5030 },*/
219 {0x1500, 0x1360, PCI_ANY_ID, PCI_ANY_ID, 0, 0, DELTA8139 },
220 {0x4033, 0x1360, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ADDTRON8139 },
223 MODULE_DEVICE_TABLE (pci, netdrv_pci_tbl);
226 /* The rest of these values should never change. */
228 /* Symbolic offsets to registers. */
229 enum NETDRV_registers {
230 MAC0 = 0, /* Ethernet hardware address. */
231 MAR0 = 8, /* Multicast filter. */
232 TxStatus0 = 0x10, /* Transmit status (Four 32bit registers). */
233 TxAddr0 = 0x20, /* Tx descriptors (also four 32bit). */
236 RxEarlyStatus = 0x36,
245 Timer = 0x48, /* A general-purpose counter. */
246 RxMissed = 0x4C, /* 24 bits valid, write clears. */
253 Config4 = 0x5A, /* absent on RTL-8139A */
257 BasicModeCtrl = 0x62,
258 BasicModeStatus = 0x64,
261 NWayExpansion = 0x6A,
262 /* Undocumented registers, but required for proper operation. */
263 FIFOTMS = 0x70, /* FIFO Control and test. */
264 CSCR = 0x74, /* Chip Status and Configuration Register. */
266 PARA7c = 0x7c, /* Magic transceiver parameter register. */
267 Config5 = 0xD8, /* absent on RTL-8139A */
271 MultiIntrClear = 0xF000,
273 Config1Clear = (1<<7)|(1<<6)|(1<<3)|(1<<2)|(1<<1),
283 /* Interrupt register bits, using my own meaningful names. */
284 enum IntrStatusBits {
299 TxOutOfWindow = 0x20000000,
300 TxAborted = 0x40000000,
301 TxCarrierLost = 0x80000000,
304 RxMulticast = 0x8000,
306 RxBroadcast = 0x2000,
307 RxBadSymbol = 0x0020,
315 /* Bits in RxConfig. */
319 AcceptBroadcast = 0x08,
320 AcceptMulticast = 0x04,
322 AcceptAllPhys = 0x01,
325 /* Bits in TxConfig. */
326 enum tx_config_bits {
327 TxIFG1 = (1 << 25), /* Interframe Gap Time */
328 TxIFG0 = (1 << 24), /* Enabling these bits violates IEEE 802.3 */
329 TxLoopBack = (1 << 18) | (1 << 17), /* enable loopback test mode */
330 TxCRC = (1 << 16), /* DISABLE appending CRC to end of Tx packets */
331 TxClearAbt = (1 << 0), /* Clear abort (WO) */
332 TxDMAShift = 8, /* DMA burst value (0-7) is shift this many bits */
334 TxVersionMask = 0x7C800000, /* mask out version bits 30-26, 23 */
337 /* Bits in Config1 */
339 Cfg1_PM_Enable = 0x01,
340 Cfg1_VPD_Enable = 0x02,
344 Cfg1_Driver_Load = 0x20,
350 /* Early Rx threshold, none or X/16 */
351 RxCfgEarlyRxNone = 0,
352 RxCfgEarlyRxShift = 24,
354 /* rx fifo threshold */
356 RxCfgFIFONone = (7 << RxCfgFIFOShift),
360 RxCfgDMAUnlimited = (7 << RxCfgDMAShift),
362 /* rx ring buffer length */
364 RxCfgRcv16K = (1 << 11),
365 RxCfgRcv32K = (1 << 12),
366 RxCfgRcv64K = (1 << 11) | (1 << 12),
368 /* Disable packet wrap at end of Rx buffer */
373 /* Twister tuning parameters from RealTek.
374 Completely undocumented, but required to tune bad links. */
376 CSCR_LinkOKBit = 0x0400,
377 CSCR_LinkChangeBit = 0x0800,
378 CSCR_LinkStatusBits = 0x0f000,
379 CSCR_LinkDownOffCmd = 0x003c0,
380 CSCR_LinkDownCmd = 0x0f3c0,
386 Cfg9346_Unlock = 0xC0,
390 #define PARA78_default 0x78fa8388
391 #define PARA7c_default 0xcb38de43 /* param[0][3] */
392 #define PARA7c_xxx 0xcb38de43
393 static const unsigned long param[4][4] = {
394 {0xcb39de43, 0xcb39ce43, 0xfb38de03, 0xcb38de43},
395 {0xcb39de43, 0xcb39ce43, 0xcb39ce83, 0xcb39ce83},
396 {0xcb39de43, 0xcb39ce43, 0xcb39ce83, 0xcb39ce83},
397 {0xbb39de43, 0xbb39ce43, 0xbb39ce83, 0xbb39ce83}
416 /* directly indexed by chip_t, above */
417 static const struct {
419 u8 version; /* from RTL8139C docs */
420 u32 RxConfigMask; /* should clear the bits supported by this chip */
421 } rtl_chip_info[] = {
424 0xf0fe0040, /* XXX copied from RTL8139A, verify */
444 0xf0fe0040, /* XXX copied from RTL8139A, verify */
449 0xf0fc0040, /* XXX copied from RTL8139B, verify */
455 struct netdrv_private {
459 struct pci_dev *pci_dev;
460 struct timer_list timer; /* Media selection timer. */
461 unsigned char *rx_ring;
462 unsigned int cur_rx; /* Index into the Rx buffer of next Rx pkt. */
463 unsigned int tx_flag;
466 /* The saved address of a sent-in-place packet/buffer, for skfree(). */
467 struct ring_info tx_info[NUM_TX_DESC];
468 unsigned char *tx_buf[NUM_TX_DESC]; /* Tx bounce buffers */
469 unsigned char *tx_bufs; /* Tx bounce buffer region. */
470 dma_addr_t rx_ring_dma;
471 dma_addr_t tx_bufs_dma;
472 char phys[4]; /* MII device addresses. */
473 char twistie, twist_row, twist_col; /* Twister tune state. */
474 unsigned int full_duplex:1; /* Full-duplex operation requested. */
475 unsigned int duplex_lock:1;
476 unsigned int default_port:4; /* Last dev->if_port value. */
477 unsigned int media2:4; /* Secondary monitored media port. */
478 unsigned int medialock:1; /* Don't sense media type. */
479 unsigned int mediasense:1; /* Media sensing in progress. */
484 MODULE_AUTHOR ("Jeff Garzik <jgarzik@pobox.com>");
485 MODULE_DESCRIPTION ("Skeleton for a PCI Fast Ethernet driver");
486 MODULE_LICENSE("GPL");
487 module_param(multicast_filter_limit, int, 0);
488 module_param(max_interrupt_work, int, 0);
489 module_param_array(media, int, NULL, 0);
490 MODULE_PARM_DESC (multicast_filter_limit, "pci-skeleton maximum number of filtered multicast addresses");
491 MODULE_PARM_DESC (max_interrupt_work, "pci-skeleton maximum events handled per interrupt");
492 MODULE_PARM_DESC (media, "pci-skeleton: Bits 0-3: media type, bit 17: full duplex");
494 static int read_eeprom (void *ioaddr, int location, int addr_len);
495 static int netdrv_open (struct net_device *dev);
496 static int mdio_read (struct net_device *dev, int phy_id, int location);
497 static void mdio_write (struct net_device *dev, int phy_id, int location,
499 static void netdrv_timer (unsigned long data);
500 static void netdrv_tx_timeout (struct net_device *dev);
501 static void netdrv_init_ring (struct net_device *dev);
502 static int netdrv_start_xmit (struct sk_buff *skb,
503 struct net_device *dev);
504 static irqreturn_t netdrv_interrupt (int irq, void *dev_instance);
505 static int netdrv_close (struct net_device *dev);
506 static int netdrv_ioctl (struct net_device *dev, struct ifreq *rq, int cmd);
507 static void netdrv_set_rx_mode (struct net_device *dev);
508 static void netdrv_hw_start (struct net_device *dev);
513 #define NETDRV_R8(reg) inb (((unsigned long)ioaddr) + (reg))
514 #define NETDRV_R16(reg) inw (((unsigned long)ioaddr) + (reg))
515 #define NETDRV_R32(reg) ((unsigned long) inl (((unsigned long)ioaddr) + (reg)))
516 #define NETDRV_W8(reg, val8) outb ((val8), ((unsigned long)ioaddr) + (reg))
517 #define NETDRV_W16(reg, val16) outw ((val16), ((unsigned long)ioaddr) + (reg))
518 #define NETDRV_W32(reg, val32) outl ((val32), ((unsigned long)ioaddr) + (reg))
519 #define NETDRV_W8_F NETDRV_W8
520 #define NETDRV_W16_F NETDRV_W16
521 #define NETDRV_W32_F NETDRV_W32
528 #define readb(addr) inb((unsigned long)(addr))
529 #define readw(addr) inw((unsigned long)(addr))
530 #define readl(addr) inl((unsigned long)(addr))
531 #define writeb(val,addr) outb((val),(unsigned long)(addr))
532 #define writew(val,addr) outw((val),(unsigned long)(addr))
533 #define writel(val,addr) outl((val),(unsigned long)(addr))
537 /* write MMIO register, with flush */
538 /* Flush avoids rtl8139 bug w/ posted MMIO writes */
539 #define NETDRV_W8_F(reg, val8) do { writeb ((val8), ioaddr + (reg)); readb (ioaddr + (reg)); } while (0)
540 #define NETDRV_W16_F(reg, val16) do { writew ((val16), ioaddr + (reg)); readw (ioaddr + (reg)); } while (0)
541 #define NETDRV_W32_F(reg, val32) do { writel ((val32), ioaddr + (reg)); readl (ioaddr + (reg)); } while (0)
544 #if MMIO_FLUSH_AUDIT_COMPLETE
546 /* write MMIO register */
547 #define NETDRV_W8(reg, val8) writeb ((val8), ioaddr + (reg))
548 #define NETDRV_W16(reg, val16) writew ((val16), ioaddr + (reg))
549 #define NETDRV_W32(reg, val32) writel ((val32), ioaddr + (reg))
553 /* write MMIO register, then flush */
554 #define NETDRV_W8 NETDRV_W8_F
555 #define NETDRV_W16 NETDRV_W16_F
556 #define NETDRV_W32 NETDRV_W32_F
558 #endif /* MMIO_FLUSH_AUDIT_COMPLETE */
560 /* read MMIO register */
561 #define NETDRV_R8(reg) readb (ioaddr + (reg))
562 #define NETDRV_R16(reg) readw (ioaddr + (reg))
563 #define NETDRV_R32(reg) ((unsigned long) readl (ioaddr + (reg)))
565 #endif /* USE_IO_OPS */
568 static const u16 netdrv_intr_mask =
569 PCIErr | PCSTimeout | RxUnderrun | RxOverflow | RxFIFOOver |
570 TxErr | TxOK | RxErr | RxOK;
572 static const unsigned int netdrv_rx_config =
573 RxCfgEarlyRxNone | RxCfgRcv32K | RxNoWrap |
574 (RX_FIFO_THRESH << RxCfgFIFOShift) |
575 (RX_DMA_BURST << RxCfgDMAShift);
578 static int __devinit netdrv_init_board (struct pci_dev *pdev,
579 struct net_device **dev_out,
583 struct net_device *dev;
584 struct netdrv_private *tp;
586 u32 pio_start, pio_end, pio_flags, pio_len;
587 unsigned long mmio_start, mmio_end, mmio_flags, mmio_len;
592 assert (pdev != NULL);
593 assert (ioaddr_out != NULL);
598 /* dev zeroed in alloc_etherdev */
599 dev = alloc_etherdev (sizeof (*tp));
601 dev_err(&pdev->dev, "unable to alloc new ethernet\n");
602 DPRINTK ("EXIT, returning -ENOMEM\n");
605 SET_NETDEV_DEV(dev, &pdev->dev);
608 /* enable device (incl. PCI PM wakeup), and bus-mastering */
609 rc = pci_enable_device (pdev);
613 pio_start = pci_resource_start (pdev, 0);
614 pio_end = pci_resource_end (pdev, 0);
615 pio_flags = pci_resource_flags (pdev, 0);
616 pio_len = pci_resource_len (pdev, 0);
618 mmio_start = pci_resource_start (pdev, 1);
619 mmio_end = pci_resource_end (pdev, 1);
620 mmio_flags = pci_resource_flags (pdev, 1);
621 mmio_len = pci_resource_len (pdev, 1);
623 /* set this immediately, we need to know before
624 * we talk to the chip directly */
625 DPRINTK("PIO region size == 0x%02X\n", pio_len);
626 DPRINTK("MMIO region size == 0x%02lX\n", mmio_len);
628 /* make sure PCI base addr 0 is PIO */
629 if (!(pio_flags & IORESOURCE_IO)) {
630 dev_err(&pdev->dev, "region #0 not a PIO resource, aborting\n");
635 /* make sure PCI base addr 1 is MMIO */
636 if (!(mmio_flags & IORESOURCE_MEM)) {
637 dev_err(&pdev->dev, "region #1 not an MMIO resource, aborting\n");
642 /* check for weird/broken PCI region reporting */
643 if ((pio_len < NETDRV_MIN_IO_SIZE) ||
644 (mmio_len < NETDRV_MIN_IO_SIZE)) {
645 dev_err(&pdev->dev, "Invalid PCI region size(s), aborting\n");
650 rc = pci_request_regions (pdev, MODNAME);
654 pci_set_master (pdev);
657 ioaddr = (void *) pio_start;
659 /* ioremap MMIO region */
660 ioaddr = ioremap (mmio_start, mmio_len);
661 if (ioaddr == NULL) {
662 dev_err(&pdev->dev, "cannot remap MMIO, aborting\n");
664 goto err_out_free_res;
666 #endif /* USE_IO_OPS */
668 /* Soft reset the chip. */
669 NETDRV_W8 (ChipCmd, (NETDRV_R8 (ChipCmd) & ChipCmdClear) | CmdReset);
671 /* Check that the chip has finished the reset. */
672 for (i = 1000; i > 0; i--)
673 if ((NETDRV_R8 (ChipCmd) & CmdReset) == 0)
678 /* Bring the chip out of low-power mode. */
679 /* <insert device-specific code here> */
682 /* sanity checks -- ensure PIO and MMIO registers agree */
683 assert (inb (pio_start+Config0) == readb (ioaddr+Config0));
684 assert (inb (pio_start+Config1) == readb (ioaddr+Config1));
685 assert (inb (pio_start+TxConfig) == readb (ioaddr+TxConfig));
686 assert (inb (pio_start+RxConfig) == readb (ioaddr+RxConfig));
687 #endif /* !USE_IO_OPS */
689 /* identify chip attached to board */
690 tmp = NETDRV_R8 (ChipVersion);
691 for (i = ARRAY_SIZE (rtl_chip_info) - 1; i >= 0; i--)
692 if (tmp == rtl_chip_info[i].version) {
697 /* if unknown chip, assume array element #0, original RTL-8139 in this case */
698 dev_printk (KERN_DEBUG, &pdev->dev,
699 "unknown chip version, assuming RTL-8139\n");
700 dev_printk (KERN_DEBUG, &pdev->dev, "TxConfig = 0x%lx\n",
701 NETDRV_R32 (TxConfig));
705 DPRINTK ("chipset id (%d) == index %d, '%s'\n",
708 rtl_chip_info[tp->chipset].name);
710 rc = register_netdev (dev);
714 DPRINTK ("EXIT, returning 0\n");
715 *ioaddr_out = ioaddr;
724 pci_release_regions (pdev);
727 DPRINTK ("EXIT, returning %d\n", rc);
732 static int __devinit netdrv_init_one (struct pci_dev *pdev,
733 const struct pci_device_id *ent)
735 struct net_device *dev = NULL;
736 struct netdrv_private *tp;
737 int i, addr_len, option;
739 static int board_idx = -1;
740 DECLARE_MAC_BUF(mac);
742 /* when built into the kernel, we only print version if device is found */
744 static int printed_version;
745 if (!printed_version++)
751 assert (pdev != NULL);
752 assert (ent != NULL);
756 i = netdrv_init_board (pdev, &dev, &ioaddr);
758 DPRINTK ("EXIT, returning %d\n", i);
764 assert (ioaddr != NULL);
765 assert (dev != NULL);
768 addr_len = read_eeprom (ioaddr, 0, 8) == 0x8129 ? 8 : 6;
769 for (i = 0; i < 3; i++)
770 ((u16 *) (dev->dev_addr))[i] =
771 le16_to_cpu (read_eeprom (ioaddr, i + 7, addr_len));
773 /* The Rtl8139-specific entries in the device structure. */
774 dev->open = netdrv_open;
775 dev->hard_start_xmit = netdrv_start_xmit;
776 dev->stop = netdrv_close;
777 dev->set_multicast_list = netdrv_set_rx_mode;
778 dev->do_ioctl = netdrv_ioctl;
779 dev->tx_timeout = netdrv_tx_timeout;
780 dev->watchdog_timeo = TX_TIMEOUT;
782 dev->irq = pdev->irq;
783 dev->base_addr = (unsigned long) ioaddr;
785 /* dev->priv/tp zeroed and aligned in alloc_etherdev */
788 /* note: tp->chipset set in netdrv_init_board */
789 tp->drv_flags = PCI_COMMAND_IO | PCI_COMMAND_MEMORY |
790 PCI_COMMAND_MASTER | NETDRV_CAPS;
792 tp->board = ent->driver_data;
793 tp->mmio_addr = ioaddr;
794 spin_lock_init(&tp->lock);
796 pci_set_drvdata(pdev, dev);
800 printk (KERN_INFO "%s: %s at 0x%lx, %sIRQ %d\n",
802 board_info[ent->driver_data].name,
804 print_mac(mac, dev->dev_addr),
807 printk (KERN_DEBUG "%s: Identified 8139 chip type '%s'\n",
808 dev->name, rtl_chip_info[tp->chipset].name);
810 /* Put the chip into low-power mode. */
811 NETDRV_W8_F (Cfg9346, Cfg9346_Unlock);
813 /* The lower four bits are the media type. */
814 option = (board_idx > 7) ? 0 : media[board_idx];
816 tp->full_duplex = (option & 0x200) ? 1 : 0;
817 tp->default_port = option & 15;
818 if (tp->default_port)
822 if (tp->full_duplex) {
824 "%s: Media type forced to Full Duplex.\n",
826 mdio_write (dev, tp->phys[0], MII_ADVERTISE, ADVERTISE_FULL);
830 DPRINTK ("EXIT - returning 0\n");
835 static void __devexit netdrv_remove_one (struct pci_dev *pdev)
837 struct net_device *dev = pci_get_drvdata (pdev);
838 struct netdrv_private *np;
842 assert (dev != NULL);
847 unregister_netdev (dev);
850 iounmap (np->mmio_addr);
851 #endif /* !USE_IO_OPS */
853 pci_release_regions (pdev);
857 pci_set_drvdata (pdev, NULL);
859 pci_disable_device (pdev);
865 /* Serial EEPROM section. */
867 /* EEPROM_Ctrl bits. */
868 #define EE_SHIFT_CLK 0x04 /* EEPROM shift clock. */
869 #define EE_CS 0x08 /* EEPROM chip select. */
870 #define EE_DATA_WRITE 0x02 /* EEPROM chip data in. */
871 #define EE_WRITE_0 0x00
872 #define EE_WRITE_1 0x02
873 #define EE_DATA_READ 0x01 /* EEPROM chip data out. */
874 #define EE_ENB (0x80 | EE_CS)
876 /* Delay between EEPROM clock transitions.
877 No extra delay is needed with 33Mhz PCI, but 66Mhz may change this.
880 #define eeprom_delay() readl(ee_addr)
882 /* The EEPROM commands include the alway-set leading bit. */
883 #define EE_WRITE_CMD (5)
884 #define EE_READ_CMD (6)
885 #define EE_ERASE_CMD (7)
887 static int __devinit read_eeprom (void *ioaddr, int location, int addr_len)
891 void *ee_addr = ioaddr + Cfg9346;
892 int read_cmd = location | (EE_READ_CMD << addr_len);
896 writeb (EE_ENB & ~EE_CS, ee_addr);
897 writeb (EE_ENB, ee_addr);
900 /* Shift the read command bits out. */
901 for (i = 4 + addr_len; i >= 0; i--) {
902 int dataval = (read_cmd & (1 << i)) ? EE_DATA_WRITE : 0;
903 writeb (EE_ENB | dataval, ee_addr);
905 writeb (EE_ENB | dataval | EE_SHIFT_CLK, ee_addr);
908 writeb (EE_ENB, ee_addr);
911 for (i = 16; i > 0; i--) {
912 writeb (EE_ENB | EE_SHIFT_CLK, ee_addr);
915 (retval << 1) | ((readb (ee_addr) & EE_DATA_READ) ? 1 :
917 writeb (EE_ENB, ee_addr);
921 /* Terminate the EEPROM access. */
922 writeb (~EE_CS, ee_addr);
925 DPRINTK ("EXIT - returning %d\n", retval);
929 /* MII serial management: mostly bogus for now. */
930 /* Read and write the MII management registers using software-generated
931 serial MDIO protocol.
932 The maximum data clock rate is 2.5 Mhz. The minimum timing is usually
933 met by back-to-back PCI I/O cycles, but we insert a delay to avoid
934 "overclocking" issues. */
935 #define MDIO_DIR 0x80
936 #define MDIO_DATA_OUT 0x04
937 #define MDIO_DATA_IN 0x02
938 #define MDIO_CLK 0x01
939 #define MDIO_WRITE0 (MDIO_DIR)
940 #define MDIO_WRITE1 (MDIO_DIR | MDIO_DATA_OUT)
942 #define mdio_delay() readb(mdio_addr)
945 static char mii_2_8139_map[8] = {
957 /* Syncronize the MII management interface by shifting 32 one bits out. */
958 static void mdio_sync (void *mdio_addr)
964 for (i = 32; i >= 0; i--) {
965 writeb (MDIO_WRITE1, mdio_addr);
967 writeb (MDIO_WRITE1 | MDIO_CLK, mdio_addr);
975 static int mdio_read (struct net_device *dev, int phy_id, int location)
977 struct netdrv_private *tp = dev->priv;
978 void *mdio_addr = tp->mmio_addr + Config4;
979 int mii_cmd = (0xf6 << 10) | (phy_id << 5) | location;
985 if (phy_id > 31) { /* Really a 8139. Use internal registers. */
986 DPRINTK ("EXIT after directly using 8139 internal regs\n");
987 return location < 8 && mii_2_8139_map[location] ?
988 readw (tp->mmio_addr + mii_2_8139_map[location]) : 0;
990 mdio_sync (mdio_addr);
991 /* Shift the read command bits out. */
992 for (i = 15; i >= 0; i--) {
993 int dataval = (mii_cmd & (1 << i)) ? MDIO_DATA_OUT : 0;
995 writeb (MDIO_DIR | dataval, mdio_addr);
997 writeb (MDIO_DIR | dataval | MDIO_CLK, mdio_addr);
1001 /* Read the two transition, 16 data, and wire-idle bits. */
1002 for (i = 19; i > 0; i--) {
1003 writeb (0, mdio_addr);
1006 (retval << 1) | ((readb (mdio_addr) & MDIO_DATA_IN) ? 1
1008 writeb (MDIO_CLK, mdio_addr);
1012 DPRINTK ("EXIT, returning %d\n", (retval >> 1) & 0xffff);
1013 return (retval >> 1) & 0xffff;
1017 static void mdio_write (struct net_device *dev, int phy_id, int location,
1020 struct netdrv_private *tp = dev->priv;
1021 void *mdio_addr = tp->mmio_addr + Config4;
1023 (0x5002 << 16) | (phy_id << 23) | (location << 18) | value;
1026 DPRINTK ("ENTER\n");
1028 if (phy_id > 31) { /* Really a 8139. Use internal registers. */
1029 if (location < 8 && mii_2_8139_map[location]) {
1031 tp->mmio_addr + mii_2_8139_map[location]);
1032 readw (tp->mmio_addr + mii_2_8139_map[location]);
1034 DPRINTK ("EXIT after directly using 8139 internal regs\n");
1037 mdio_sync (mdio_addr);
1039 /* Shift the command bits out. */
1040 for (i = 31; i >= 0; i--) {
1042 (mii_cmd & (1 << i)) ? MDIO_WRITE1 : MDIO_WRITE0;
1043 writeb (dataval, mdio_addr);
1045 writeb (dataval | MDIO_CLK, mdio_addr);
1049 /* Clear out extra bits. */
1050 for (i = 2; i > 0; i--) {
1051 writeb (0, mdio_addr);
1053 writeb (MDIO_CLK, mdio_addr);
1061 static int netdrv_open (struct net_device *dev)
1063 struct netdrv_private *tp = dev->priv;
1066 void *ioaddr = tp->mmio_addr;
1069 DPRINTK ("ENTER\n");
1071 retval = request_irq (dev->irq, netdrv_interrupt, IRQF_SHARED, dev->name, dev);
1073 DPRINTK ("EXIT, returning %d\n", retval);
1077 tp->tx_bufs = pci_alloc_consistent(tp->pci_dev, TX_BUF_TOT_LEN,
1079 tp->rx_ring = pci_alloc_consistent(tp->pci_dev, RX_BUF_TOT_LEN,
1081 if (tp->tx_bufs == NULL || tp->rx_ring == NULL) {
1082 free_irq(dev->irq, dev);
1085 pci_free_consistent(tp->pci_dev, TX_BUF_TOT_LEN,
1086 tp->tx_bufs, tp->tx_bufs_dma);
1088 pci_free_consistent(tp->pci_dev, RX_BUF_TOT_LEN,
1089 tp->rx_ring, tp->rx_ring_dma);
1091 DPRINTK ("EXIT, returning -ENOMEM\n");
1096 tp->full_duplex = tp->duplex_lock;
1097 tp->tx_flag = (TX_FIFO_THRESH << 11) & 0x003f0000;
1099 netdrv_init_ring (dev);
1100 netdrv_hw_start (dev);
1102 DPRINTK ("%s: netdrv_open() ioaddr %#lx IRQ %d"
1103 " GP Pins %2.2x %s-duplex.\n",
1104 dev->name, pci_resource_start (tp->pci_dev, 1),
1105 dev->irq, NETDRV_R8 (MediaStatus),
1106 tp->full_duplex ? "full" : "half");
1108 /* Set the timer to switch to check for link beat and perhaps switch
1109 to an alternate media type. */
1110 init_timer (&tp->timer);
1111 tp->timer.expires = jiffies + 3 * HZ;
1112 tp->timer.data = (unsigned long) dev;
1113 tp->timer.function = &netdrv_timer;
1114 add_timer (&tp->timer);
1116 DPRINTK ("EXIT, returning 0\n");
1121 /* Start the hardware at open or resume. */
1122 static void netdrv_hw_start (struct net_device *dev)
1124 struct netdrv_private *tp = dev->priv;
1125 void *ioaddr = tp->mmio_addr;
1128 DPRINTK ("ENTER\n");
1130 /* Soft reset the chip. */
1131 NETDRV_W8 (ChipCmd, (NETDRV_R8 (ChipCmd) & ChipCmdClear) | CmdReset);
1134 /* Check that the chip has finished the reset. */
1135 for (i = 1000; i > 0; i--)
1136 if ((NETDRV_R8 (ChipCmd) & CmdReset) == 0)
1139 /* Restore our idea of the MAC address. */
1140 NETDRV_W32_F (MAC0 + 0, cpu_to_le32 (*(u32 *) (dev->dev_addr + 0)));
1141 NETDRV_W32_F (MAC0 + 4, cpu_to_le32 (*(u32 *) (dev->dev_addr + 4)));
1143 /* Must enable Tx/Rx before setting transfer thresholds! */
1144 NETDRV_W8_F (ChipCmd, (NETDRV_R8 (ChipCmd) & ChipCmdClear) |
1145 CmdRxEnb | CmdTxEnb);
1147 i = netdrv_rx_config |
1148 (NETDRV_R32 (RxConfig) & rtl_chip_info[tp->chipset].RxConfigMask);
1149 NETDRV_W32_F (RxConfig, i);
1151 /* Check this value: the documentation for IFG contradicts ifself. */
1152 NETDRV_W32 (TxConfig, (TX_DMA_BURST << TxDMAShift));
1154 /* unlock Config[01234] and BMCR register writes */
1155 NETDRV_W8_F (Cfg9346, Cfg9346_Unlock);
1160 /* Lock Config[01234] and BMCR register writes */
1161 NETDRV_W8_F (Cfg9346, Cfg9346_Lock);
1164 /* init Rx ring buffer DMA address */
1165 NETDRV_W32_F (RxBuf, tp->rx_ring_dma);
1167 /* init Tx buffer DMA addresses */
1168 for (i = 0; i < NUM_TX_DESC; i++)
1169 NETDRV_W32_F (TxAddr0 + (i * 4), tp->tx_bufs_dma + (tp->tx_buf[i] - tp->tx_bufs));
1171 NETDRV_W32_F (RxMissed, 0);
1173 netdrv_set_rx_mode (dev);
1175 /* no early-rx interrupts */
1176 NETDRV_W16 (MultiIntr, NETDRV_R16 (MultiIntr) & MultiIntrClear);
1178 /* make sure RxTx has started */
1179 NETDRV_W8_F (ChipCmd, (NETDRV_R8 (ChipCmd) & ChipCmdClear) |
1180 CmdRxEnb | CmdTxEnb);
1182 /* Enable all known interrupts by setting the interrupt mask. */
1183 NETDRV_W16_F (IntrMask, netdrv_intr_mask);
1185 netif_start_queue (dev);
1191 /* Initialize the Rx and Tx rings, along with various 'dev' bits. */
1192 static void netdrv_init_ring (struct net_device *dev)
1194 struct netdrv_private *tp = dev->priv;
1197 DPRINTK ("ENTER\n");
1200 atomic_set (&tp->cur_tx, 0);
1201 atomic_set (&tp->dirty_tx, 0);
1203 for (i = 0; i < NUM_TX_DESC; i++) {
1204 tp->tx_info[i].skb = NULL;
1205 tp->tx_info[i].mapping = 0;
1206 tp->tx_buf[i] = &tp->tx_bufs[i * TX_BUF_SIZE];
1213 static void netdrv_timer (unsigned long data)
1215 struct net_device *dev = (struct net_device *) data;
1216 struct netdrv_private *tp = dev->priv;
1217 void *ioaddr = tp->mmio_addr;
1218 int next_tick = 60 * HZ;
1221 mii_lpa = mdio_read (dev, tp->phys[0], MII_LPA);
1223 if (!tp->duplex_lock && mii_lpa != 0xffff) {
1224 int duplex = (mii_lpa & LPA_100FULL)
1225 || (mii_lpa & 0x01C0) == 0x0040;
1226 if (tp->full_duplex != duplex) {
1227 tp->full_duplex = duplex;
1229 "%s: Setting %s-duplex based on MII #%d link"
1230 " partner ability of %4.4x.\n", dev->name,
1231 tp->full_duplex ? "full" : "half",
1232 tp->phys[0], mii_lpa);
1233 NETDRV_W8 (Cfg9346, Cfg9346_Unlock);
1234 NETDRV_W8 (Config1, tp->full_duplex ? 0x60 : 0x20);
1235 NETDRV_W8 (Cfg9346, Cfg9346_Lock);
1239 DPRINTK ("%s: Media selection tick, Link partner %4.4x.\n",
1240 dev->name, NETDRV_R16 (NWayLPAR));
1241 DPRINTK ("%s: Other registers are IntMask %4.4x IntStatus %4.4x"
1242 " RxStatus %4.4x.\n", dev->name,
1243 NETDRV_R16 (IntrMask),
1244 NETDRV_R16 (IntrStatus),
1245 NETDRV_R32 (RxEarlyStatus));
1246 DPRINTK ("%s: Chip config %2.2x %2.2x.\n",
1247 dev->name, NETDRV_R8 (Config0),
1248 NETDRV_R8 (Config1));
1250 tp->timer.expires = jiffies + next_tick;
1251 add_timer (&tp->timer);
1255 static void netdrv_tx_clear (struct netdrv_private *tp)
1259 atomic_set (&tp->cur_tx, 0);
1260 atomic_set (&tp->dirty_tx, 0);
1262 /* Dump the unsent Tx packets. */
1263 for (i = 0; i < NUM_TX_DESC; i++) {
1264 struct ring_info *rp = &tp->tx_info[i];
1265 if (rp->mapping != 0) {
1266 pci_unmap_single (tp->pci_dev, rp->mapping,
1267 rp->skb->len, PCI_DMA_TODEVICE);
1271 dev_kfree_skb (rp->skb);
1273 dev->stats.tx_dropped++;
1279 static void netdrv_tx_timeout (struct net_device *dev)
1281 struct netdrv_private *tp = dev->priv;
1282 void *ioaddr = tp->mmio_addr;
1285 unsigned long flags;
1287 DPRINTK ("%s: Transmit timeout, status %2.2x %4.4x "
1288 "media %2.2x.\n", dev->name,
1289 NETDRV_R8 (ChipCmd),
1290 NETDRV_R16 (IntrStatus),
1291 NETDRV_R8 (MediaStatus));
1293 /* disable Tx ASAP, if not already */
1294 tmp8 = NETDRV_R8 (ChipCmd);
1295 if (tmp8 & CmdTxEnb)
1296 NETDRV_W8 (ChipCmd, tmp8 & ~CmdTxEnb);
1298 /* Disable interrupts by clearing the interrupt mask. */
1299 NETDRV_W16 (IntrMask, 0x0000);
1301 /* Emit info to figure out what went wrong. */
1302 printk (KERN_DEBUG "%s: Tx queue start entry %d dirty entry %d.\n",
1303 dev->name, atomic_read (&tp->cur_tx),
1304 atomic_read (&tp->dirty_tx));
1305 for (i = 0; i < NUM_TX_DESC; i++)
1306 printk (KERN_DEBUG "%s: Tx descriptor %d is %8.8lx.%s\n",
1307 dev->name, i, NETDRV_R32 (TxStatus0 + (i * 4)),
1308 i == atomic_read (&tp->dirty_tx) % NUM_TX_DESC ?
1309 " (queue head)" : "");
1311 /* Stop a shared interrupt from scavenging while we are. */
1312 spin_lock_irqsave (&tp->lock, flags);
1314 netdrv_tx_clear (tp);
1316 spin_unlock_irqrestore (&tp->lock, flags);
1318 /* ...and finally, reset everything */
1319 netdrv_hw_start (dev);
1321 netif_wake_queue (dev);
1326 static int netdrv_start_xmit (struct sk_buff *skb, struct net_device *dev)
1328 struct netdrv_private *tp = dev->priv;
1329 void *ioaddr = tp->mmio_addr;
1332 /* Calculate the next Tx descriptor entry. */
1333 entry = atomic_read (&tp->cur_tx) % NUM_TX_DESC;
1335 assert (tp->tx_info[entry].skb == NULL);
1336 assert (tp->tx_info[entry].mapping == 0);
1338 tp->tx_info[entry].skb = skb;
1339 /* tp->tx_info[entry].mapping = 0; */
1340 skb_copy_from_linear_data(skb, tp->tx_buf[entry], skb->len);
1342 /* Note: the chip doesn't have auto-pad! */
1343 NETDRV_W32 (TxStatus0 + (entry * sizeof(u32)),
1344 tp->tx_flag | (skb->len >= ETH_ZLEN ? skb->len : ETH_ZLEN));
1346 dev->trans_start = jiffies;
1347 atomic_inc (&tp->cur_tx);
1348 if ((atomic_read (&tp->cur_tx) - atomic_read (&tp->dirty_tx)) >= NUM_TX_DESC)
1349 netif_stop_queue (dev);
1351 DPRINTK ("%s: Queued Tx packet at %p size %u to slot %d.\n",
1352 dev->name, skb->data, skb->len, entry);
1358 static void netdrv_tx_interrupt (struct net_device *dev,
1359 struct netdrv_private *tp,
1362 int cur_tx, dirty_tx, tx_left;
1364 assert (dev != NULL);
1365 assert (tp != NULL);
1366 assert (ioaddr != NULL);
1368 dirty_tx = atomic_read (&tp->dirty_tx);
1370 cur_tx = atomic_read (&tp->cur_tx);
1371 tx_left = cur_tx - dirty_tx;
1372 while (tx_left > 0) {
1373 int entry = dirty_tx % NUM_TX_DESC;
1376 txstatus = NETDRV_R32 (TxStatus0 + (entry * sizeof (u32)));
1378 if (!(txstatus & (TxStatOK | TxUnderrun | TxAborted)))
1379 break; /* It still hasn't been Txed */
1381 /* Note: TxCarrierLost is always asserted at 100mbps. */
1382 if (txstatus & (TxOutOfWindow | TxAborted)) {
1383 /* There was an major error, log it. */
1384 DPRINTK ("%s: Transmit error, Tx status %8.8x.\n",
1385 dev->name, txstatus);
1386 dev->stats.tx_errors++;
1387 if (txstatus & TxAborted) {
1388 dev->stats.tx_aborted_errors++;
1389 NETDRV_W32 (TxConfig, TxClearAbt | (TX_DMA_BURST << TxDMAShift));
1391 if (txstatus & TxCarrierLost)
1392 dev->stats.tx_carrier_errors++;
1393 if (txstatus & TxOutOfWindow)
1394 dev->stats.tx_window_errors++;
1396 if (txstatus & TxUnderrun) {
1397 /* Add 64 to the Tx FIFO threshold. */
1398 if (tp->tx_flag < 0x00300000)
1399 tp->tx_flag += 0x00020000;
1400 dev->stats.tx_fifo_errors++;
1402 dev->stats.collisions += (txstatus >> 24) & 15;
1403 dev->stats.tx_bytes += txstatus & 0x7ff;
1404 dev->stats.tx_packets++;
1407 /* Free the original skb. */
1408 if (tp->tx_info[entry].mapping != 0) {
1409 pci_unmap_single(tp->pci_dev,
1410 tp->tx_info[entry].mapping,
1411 tp->tx_info[entry].skb->len,
1413 tp->tx_info[entry].mapping = 0;
1415 dev_kfree_skb_irq (tp->tx_info[entry].skb);
1416 tp->tx_info[entry].skb = NULL;
1418 if (dirty_tx < 0) { /* handle signed int overflow */
1419 atomic_sub (cur_tx, &tp->cur_tx); /* XXX racy? */
1420 dirty_tx = cur_tx - tx_left + 1;
1422 if (netif_queue_stopped (dev))
1423 netif_wake_queue (dev);
1425 cur_tx = atomic_read (&tp->cur_tx);
1426 tx_left = cur_tx - dirty_tx;
1430 #ifndef NETDRV_NDEBUG
1431 if (atomic_read (&tp->cur_tx) - dirty_tx > NUM_TX_DESC) {
1433 "%s: Out-of-sync dirty pointer, %d vs. %d.\n",
1434 dev->name, dirty_tx, atomic_read (&tp->cur_tx));
1435 dirty_tx += NUM_TX_DESC;
1437 #endif /* NETDRV_NDEBUG */
1439 atomic_set (&tp->dirty_tx, dirty_tx);
1443 /* TODO: clean this up! Rx reset need not be this intensive */
1444 static void netdrv_rx_err (u32 rx_status, struct net_device *dev,
1445 struct netdrv_private *tp, void *ioaddr)
1448 int tmp_work = 1000;
1450 DPRINTK ("%s: Ethernet frame had errors, status %8.8x.\n",
1451 dev->name, rx_status);
1452 if (rx_status & RxTooLong) {
1453 DPRINTK ("%s: Oversized Ethernet frame, status %4.4x!\n",
1454 dev->name, rx_status);
1455 /* A.C.: The chip hangs here. */
1457 dev->stats.rx_errors++;
1458 if (rx_status & (RxBadSymbol | RxBadAlign))
1459 dev->stats.rx_frame_errors++;
1460 if (rx_status & (RxRunt | RxTooLong))
1461 dev->stats.rx_length_errors++;
1462 if (rx_status & RxCRCErr)
1463 dev->stats.rx_crc_errors++;
1464 /* Reset the receiver, based on RealTek recommendation. (Bug?) */
1467 /* disable receive */
1468 tmp8 = NETDRV_R8 (ChipCmd) & ChipCmdClear;
1469 NETDRV_W8_F (ChipCmd, tmp8 | CmdTxEnb);
1471 /* A.C.: Reset the multicast list. */
1472 netdrv_set_rx_mode (dev);
1474 /* XXX potentially temporary hack to
1475 * restart hung receiver */
1476 while (--tmp_work > 0) {
1477 tmp8 = NETDRV_R8 (ChipCmd);
1478 if ((tmp8 & CmdRxEnb) && (tmp8 & CmdTxEnb))
1480 NETDRV_W8_F (ChipCmd,
1481 (tmp8 & ChipCmdClear) | CmdRxEnb | CmdTxEnb);
1484 /* G.S.: Re-enable receiver */
1485 /* XXX temporary hack to work around receiver hang */
1486 netdrv_set_rx_mode (dev);
1489 printk (KERN_WARNING PFX "tx/rx enable wait too long\n");
1493 /* The data sheet doesn't describe the Rx ring at all, so I'm guessing at the
1494 field alignments and semantics. */
1495 static void netdrv_rx_interrupt (struct net_device *dev,
1496 struct netdrv_private *tp, void *ioaddr)
1498 unsigned char *rx_ring;
1501 assert (dev != NULL);
1502 assert (tp != NULL);
1503 assert (ioaddr != NULL);
1505 rx_ring = tp->rx_ring;
1506 cur_rx = tp->cur_rx;
1508 DPRINTK ("%s: In netdrv_rx(), current %4.4x BufAddr %4.4x,"
1509 " free to %4.4x, Cmd %2.2x.\n", dev->name, cur_rx,
1510 NETDRV_R16 (RxBufAddr),
1511 NETDRV_R16 (RxBufPtr), NETDRV_R8 (ChipCmd));
1513 while ((NETDRV_R8 (ChipCmd) & RxBufEmpty) == 0) {
1514 int ring_offset = cur_rx % RX_BUF_LEN;
1516 unsigned int rx_size;
1517 unsigned int pkt_size;
1518 struct sk_buff *skb;
1520 /* read size+status of next frame from DMA ring buffer */
1521 rx_status = le32_to_cpu (*(u32 *) (rx_ring + ring_offset));
1522 rx_size = rx_status >> 16;
1523 pkt_size = rx_size - 4;
1525 DPRINTK ("%s: netdrv_rx() status %4.4x, size %4.4x,"
1526 " cur %4.4x.\n", dev->name, rx_status,
1528 #if NETDRV_DEBUG > 2
1531 DPRINTK ("%s: Frame contents ", dev->name);
1532 for (i = 0; i < 70; i++)
1534 rx_ring[ring_offset + i]);
1539 /* If Rx err or invalid rx_size/rx_status received
1540 * (which happens if we get lost in the ring),
1541 * Rx process gets reset, so we abort any further
1544 if ((rx_size > (MAX_ETH_FRAME_SIZE+4)) ||
1545 (!(rx_status & RxStatusOK))) {
1546 netdrv_rx_err (rx_status, dev, tp, ioaddr);
1550 /* Malloc up new buffer, compatible with net-2e. */
1551 /* Omit the four octet CRC from the length. */
1553 /* TODO: consider allocating skb's outside of
1554 * interrupt context, both to speed interrupt processing,
1555 * and also to reduce the chances of having to
1556 * drop packets here under memory pressure.
1559 skb = dev_alloc_skb (pkt_size + 2);
1561 skb_reserve (skb, 2); /* 16 byte align the IP fields. */
1563 skb_copy_to_linear_data (skb, &rx_ring[ring_offset + 4], pkt_size);
1564 skb_put (skb, pkt_size);
1566 skb->protocol = eth_type_trans (skb, dev);
1568 dev->last_rx = jiffies;
1569 dev->stats.rx_bytes += pkt_size;
1570 dev->stats.rx_packets++;
1572 printk (KERN_WARNING
1573 "%s: Memory squeeze, dropping packet.\n",
1575 dev->stats.rx_dropped++;
1578 cur_rx = (cur_rx + rx_size + 4 + 3) & ~3;
1579 NETDRV_W16_F (RxBufPtr, cur_rx - 16);
1582 DPRINTK ("%s: Done netdrv_rx(), current %4.4x BufAddr %4.4x,"
1583 " free to %4.4x, Cmd %2.2x.\n", dev->name, cur_rx,
1584 NETDRV_R16 (RxBufAddr),
1585 NETDRV_R16 (RxBufPtr), NETDRV_R8 (ChipCmd));
1587 tp->cur_rx = cur_rx;
1591 static void netdrv_weird_interrupt (struct net_device *dev,
1592 struct netdrv_private *tp,
1594 int status, int link_changed)
1596 printk (KERN_DEBUG "%s: Abnormal interrupt, status %8.8x.\n",
1599 assert (dev != NULL);
1600 assert (tp != NULL);
1601 assert (ioaddr != NULL);
1603 /* Update the error count. */
1604 dev->stats.rx_missed_errors += NETDRV_R32 (RxMissed);
1605 NETDRV_W32 (RxMissed, 0);
1607 if ((status & RxUnderrun) && link_changed &&
1608 (tp->drv_flags & HAS_LNK_CHNG)) {
1609 /* Really link-change on new chips. */
1610 int lpar = NETDRV_R16 (NWayLPAR);
1611 int duplex = (lpar & 0x0100) || (lpar & 0x01C0) == 0x0040
1613 if (tp->full_duplex != duplex) {
1614 tp->full_duplex = duplex;
1615 NETDRV_W8 (Cfg9346, Cfg9346_Unlock);
1616 NETDRV_W8 (Config1, tp->full_duplex ? 0x60 : 0x20);
1617 NETDRV_W8 (Cfg9346, Cfg9346_Lock);
1619 status &= ~RxUnderrun;
1622 /* XXX along with netdrv_rx_err, are we double-counting errors? */
1624 (RxUnderrun | RxOverflow | RxErr | RxFIFOOver))
1625 dev->stats.rx_errors++;
1627 if (status & (PCSTimeout))
1628 dev->stats.rx_length_errors++;
1629 if (status & (RxUnderrun | RxFIFOOver))
1630 dev->stats.rx_fifo_errors++;
1631 if (status & RxOverflow) {
1632 dev->stats.rx_over_errors++;
1633 tp->cur_rx = NETDRV_R16 (RxBufAddr) % RX_BUF_LEN;
1634 NETDRV_W16_F (RxBufPtr, tp->cur_rx - 16);
1636 if (status & PCIErr) {
1638 pci_read_config_word (tp->pci_dev, PCI_STATUS, &pci_cmd_status);
1640 printk (KERN_ERR "%s: PCI Bus error %4.4x.\n",
1641 dev->name, pci_cmd_status);
1646 /* The interrupt handler does all of the Rx thread work and cleans up
1647 after the Tx thread. */
1648 static irqreturn_t netdrv_interrupt (int irq, void *dev_instance)
1650 struct net_device *dev = (struct net_device *) dev_instance;
1651 struct netdrv_private *tp = dev->priv;
1652 int boguscnt = max_interrupt_work;
1653 void *ioaddr = tp->mmio_addr;
1654 int status = 0, link_changed = 0; /* avoid bogus "uninit" warning */
1657 spin_lock (&tp->lock);
1660 status = NETDRV_R16 (IntrStatus);
1662 /* h/w no longer present (hotplug?) or major error, bail */
1663 if (status == 0xFFFF)
1667 /* Acknowledge all of the current interrupt sources ASAP */
1668 NETDRV_W16_F (IntrStatus, status);
1670 DPRINTK ("%s: interrupt status=%#4.4x new intstat=%#4.4x.\n",
1672 NETDRV_R16 (IntrStatus));
1675 (PCIErr | PCSTimeout | RxUnderrun | RxOverflow |
1676 RxFIFOOver | TxErr | TxOK | RxErr | RxOK)) == 0)
1679 /* Check uncommon events with one test. */
1680 if (status & (PCIErr | PCSTimeout | RxUnderrun | RxOverflow |
1681 RxFIFOOver | TxErr | RxErr))
1682 netdrv_weird_interrupt (dev, tp, ioaddr,
1683 status, link_changed);
1685 if (status & (RxOK | RxUnderrun | RxOverflow | RxFIFOOver)) /* Rx interrupt */
1686 netdrv_rx_interrupt (dev, tp, ioaddr);
1688 if (status & (TxOK | TxErr))
1689 netdrv_tx_interrupt (dev, tp, ioaddr);
1692 } while (boguscnt > 0);
1694 if (boguscnt <= 0) {
1695 printk (KERN_WARNING
1696 "%s: Too much work at interrupt, "
1697 "IntrStatus=0x%4.4x.\n", dev->name,
1700 /* Clear all interrupt sources. */
1701 NETDRV_W16 (IntrStatus, 0xffff);
1704 spin_unlock (&tp->lock);
1706 DPRINTK ("%s: exiting interrupt, intr_status=%#4.4x.\n",
1707 dev->name, NETDRV_R16 (IntrStatus));
1708 return IRQ_RETVAL(handled);
1712 static int netdrv_close (struct net_device *dev)
1714 struct netdrv_private *tp = dev->priv;
1715 void *ioaddr = tp->mmio_addr;
1716 unsigned long flags;
1718 DPRINTK ("ENTER\n");
1720 netif_stop_queue (dev);
1722 DPRINTK ("%s: Shutting down ethercard, status was 0x%4.4x.\n",
1723 dev->name, NETDRV_R16 (IntrStatus));
1725 del_timer_sync (&tp->timer);
1727 spin_lock_irqsave (&tp->lock, flags);
1729 /* Stop the chip's Tx and Rx DMA processes. */
1730 NETDRV_W8 (ChipCmd, (NETDRV_R8 (ChipCmd) & ChipCmdClear));
1732 /* Disable interrupts by clearing the interrupt mask. */
1733 NETDRV_W16 (IntrMask, 0x0000);
1735 /* Update the error counts. */
1736 dev->stats.rx_missed_errors += NETDRV_R32 (RxMissed);
1737 NETDRV_W32 (RxMissed, 0);
1739 spin_unlock_irqrestore (&tp->lock, flags);
1742 free_irq (dev->irq, dev);
1744 netdrv_tx_clear (tp);
1746 pci_free_consistent(tp->pci_dev, RX_BUF_TOT_LEN,
1747 tp->rx_ring, tp->rx_ring_dma);
1748 pci_free_consistent(tp->pci_dev, TX_BUF_TOT_LEN,
1749 tp->tx_bufs, tp->tx_bufs_dma);
1753 /* Green! Put the chip in low-power mode. */
1754 NETDRV_W8 (Cfg9346, Cfg9346_Unlock);
1755 NETDRV_W8 (Config1, 0x03);
1756 NETDRV_W8 (Cfg9346, Cfg9346_Lock);
1763 static int netdrv_ioctl (struct net_device *dev, struct ifreq *rq, int cmd)
1765 struct netdrv_private *tp = dev->priv;
1766 struct mii_ioctl_data *data = if_mii(rq);
1767 unsigned long flags;
1770 DPRINTK ("ENTER\n");
1773 case SIOCGMIIPHY: /* Get address of MII PHY in use. */
1774 data->phy_id = tp->phys[0] & 0x3f;
1777 case SIOCGMIIREG: /* Read MII PHY register. */
1778 spin_lock_irqsave (&tp->lock, flags);
1779 data->val_out = mdio_read (dev, data->phy_id & 0x1f, data->reg_num & 0x1f);
1780 spin_unlock_irqrestore (&tp->lock, flags);
1783 case SIOCSMIIREG: /* Write MII PHY register. */
1784 if (!capable (CAP_NET_ADMIN)) {
1789 spin_lock_irqsave (&tp->lock, flags);
1790 mdio_write (dev, data->phy_id & 0x1f, data->reg_num & 0x1f, data->val_in);
1791 spin_unlock_irqrestore (&tp->lock, flags);
1799 DPRINTK ("EXIT, returning %d\n", rc);
1803 /* Set or clear the multicast filter for this adaptor.
1804 This routine is not state sensitive and need not be SMP locked. */
1806 static void netdrv_set_rx_mode (struct net_device *dev)
1808 struct netdrv_private *tp = dev->priv;
1809 void *ioaddr = tp->mmio_addr;
1810 u32 mc_filter[2]; /* Multicast hash filter */
1814 DPRINTK ("ENTER\n");
1816 DPRINTK ("%s: netdrv_set_rx_mode(%4.4x) done -- Rx config %8.8x.\n",
1817 dev->name, dev->flags, NETDRV_R32 (RxConfig));
1819 /* Note: do not reorder, GCC is clever about common statements. */
1820 if (dev->flags & IFF_PROMISC) {
1822 AcceptBroadcast | AcceptMulticast | AcceptMyPhys |
1824 mc_filter[1] = mc_filter[0] = 0xffffffff;
1825 } else if ((dev->mc_count > multicast_filter_limit)
1826 || (dev->flags & IFF_ALLMULTI)) {
1827 /* Too many to filter perfectly -- accept all multicasts. */
1828 rx_mode = AcceptBroadcast | AcceptMulticast | AcceptMyPhys;
1829 mc_filter[1] = mc_filter[0] = 0xffffffff;
1831 struct dev_mc_list *mclist;
1832 rx_mode = AcceptBroadcast | AcceptMulticast | AcceptMyPhys;
1833 mc_filter[1] = mc_filter[0] = 0;
1834 for (i = 0, mclist = dev->mc_list; mclist && i < dev->mc_count;
1835 i++, mclist = mclist->next) {
1836 int bit_nr = ether_crc(ETH_ALEN, mclist->dmi_addr) >> 26;
1838 mc_filter[bit_nr >> 5] |= 1 << (bit_nr & 31);
1842 /* if called from irq handler, lock already acquired */
1844 spin_lock_irq (&tp->lock);
1846 /* We can safely update without stopping the chip. */
1847 tmp = netdrv_rx_config | rx_mode |
1848 (NETDRV_R32 (RxConfig) & rtl_chip_info[tp->chipset].RxConfigMask);
1849 NETDRV_W32_F (RxConfig, tmp);
1850 NETDRV_W32_F (MAR0 + 0, mc_filter[0]);
1851 NETDRV_W32_F (MAR0 + 4, mc_filter[1]);
1854 spin_unlock_irq (&tp->lock);
1862 static int netdrv_suspend (struct pci_dev *pdev, pm_message_t state)
1864 struct net_device *dev = pci_get_drvdata (pdev);
1865 struct netdrv_private *tp = dev->priv;
1866 void *ioaddr = tp->mmio_addr;
1867 unsigned long flags;
1869 if (!netif_running(dev))
1871 netif_device_detach (dev);
1873 spin_lock_irqsave (&tp->lock, flags);
1875 /* Disable interrupts, stop Tx and Rx. */
1876 NETDRV_W16 (IntrMask, 0x0000);
1877 NETDRV_W8 (ChipCmd, (NETDRV_R8 (ChipCmd) & ChipCmdClear));
1879 /* Update the error counts. */
1880 dev->stats.rx_missed_errors += NETDRV_R32 (RxMissed);
1881 NETDRV_W32 (RxMissed, 0);
1883 spin_unlock_irqrestore (&tp->lock, flags);
1885 pci_save_state (pdev);
1886 pci_set_power_state (pdev, PCI_D3hot);
1892 static int netdrv_resume (struct pci_dev *pdev)
1894 struct net_device *dev = pci_get_drvdata (pdev);
1895 struct netdrv_private *tp = dev->priv;
1897 if (!netif_running(dev))
1899 pci_set_power_state (pdev, PCI_D0);
1900 pci_restore_state (pdev);
1901 netif_device_attach (dev);
1902 netdrv_hw_start (dev);
1907 #endif /* CONFIG_PM */
1910 static struct pci_driver netdrv_pci_driver = {
1912 .id_table = netdrv_pci_tbl,
1913 .probe = netdrv_init_one,
1914 .remove = __devexit_p(netdrv_remove_one),
1916 .suspend = netdrv_suspend,
1917 .resume = netdrv_resume,
1918 #endif /* CONFIG_PM */
1922 static int __init netdrv_init_module (void)
1924 /* when a module, this is printed whether or not devices are found in probe */
1928 return pci_register_driver(&netdrv_pci_driver);
1932 static void __exit netdrv_cleanup_module (void)
1934 pci_unregister_driver (&netdrv_pci_driver);
1938 module_init(netdrv_init_module);
1939 module_exit(netdrv_cleanup_module);