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 net_device_stats stats;
461 struct timer_list timer; /* Media selection timer. */
462 unsigned char *rx_ring;
463 unsigned int cur_rx; /* Index into the Rx buffer of next Rx pkt. */
464 unsigned int tx_flag;
467 /* The saved address of a sent-in-place packet/buffer, for skfree(). */
468 struct ring_info tx_info[NUM_TX_DESC];
469 unsigned char *tx_buf[NUM_TX_DESC]; /* Tx bounce buffers */
470 unsigned char *tx_bufs; /* Tx bounce buffer region. */
471 dma_addr_t rx_ring_dma;
472 dma_addr_t tx_bufs_dma;
473 char phys[4]; /* MII device addresses. */
474 char twistie, twist_row, twist_col; /* Twister tune state. */
475 unsigned int full_duplex:1; /* Full-duplex operation requested. */
476 unsigned int duplex_lock:1;
477 unsigned int default_port:4; /* Last dev->if_port value. */
478 unsigned int media2:4; /* Secondary monitored media port. */
479 unsigned int medialock:1; /* Don't sense media type. */
480 unsigned int mediasense:1; /* Media sensing in progress. */
485 MODULE_AUTHOR ("Jeff Garzik <jgarzik@pobox.com>");
486 MODULE_DESCRIPTION ("Skeleton for a PCI Fast Ethernet driver");
487 MODULE_LICENSE("GPL");
488 module_param(multicast_filter_limit, int, 0);
489 module_param(max_interrupt_work, int, 0);
490 module_param_array(media, int, NULL, 0);
491 MODULE_PARM_DESC (multicast_filter_limit, "pci-skeleton maximum number of filtered multicast addresses");
492 MODULE_PARM_DESC (max_interrupt_work, "pci-skeleton maximum events handled per interrupt");
493 MODULE_PARM_DESC (media, "pci-skeleton: Bits 0-3: media type, bit 17: full duplex");
495 static int read_eeprom (void *ioaddr, int location, int addr_len);
496 static int netdrv_open (struct net_device *dev);
497 static int mdio_read (struct net_device *dev, int phy_id, int location);
498 static void mdio_write (struct net_device *dev, int phy_id, int location,
500 static void netdrv_timer (unsigned long data);
501 static void netdrv_tx_timeout (struct net_device *dev);
502 static void netdrv_init_ring (struct net_device *dev);
503 static int netdrv_start_xmit (struct sk_buff *skb,
504 struct net_device *dev);
505 static irqreturn_t netdrv_interrupt (int irq, void *dev_instance);
506 static int netdrv_close (struct net_device *dev);
507 static int netdrv_ioctl (struct net_device *dev, struct ifreq *rq, int cmd);
508 static struct net_device_stats *netdrv_get_stats (struct net_device *dev);
509 static void netdrv_set_rx_mode (struct net_device *dev);
510 static void netdrv_hw_start (struct net_device *dev);
515 #define NETDRV_R8(reg) inb (((unsigned long)ioaddr) + (reg))
516 #define NETDRV_R16(reg) inw (((unsigned long)ioaddr) + (reg))
517 #define NETDRV_R32(reg) ((unsigned long) inl (((unsigned long)ioaddr) + (reg)))
518 #define NETDRV_W8(reg, val8) outb ((val8), ((unsigned long)ioaddr) + (reg))
519 #define NETDRV_W16(reg, val16) outw ((val16), ((unsigned long)ioaddr) + (reg))
520 #define NETDRV_W32(reg, val32) outl ((val32), ((unsigned long)ioaddr) + (reg))
521 #define NETDRV_W8_F NETDRV_W8
522 #define NETDRV_W16_F NETDRV_W16
523 #define NETDRV_W32_F NETDRV_W32
530 #define readb(addr) inb((unsigned long)(addr))
531 #define readw(addr) inw((unsigned long)(addr))
532 #define readl(addr) inl((unsigned long)(addr))
533 #define writeb(val,addr) outb((val),(unsigned long)(addr))
534 #define writew(val,addr) outw((val),(unsigned long)(addr))
535 #define writel(val,addr) outl((val),(unsigned long)(addr))
539 /* write MMIO register, with flush */
540 /* Flush avoids rtl8139 bug w/ posted MMIO writes */
541 #define NETDRV_W8_F(reg, val8) do { writeb ((val8), ioaddr + (reg)); readb (ioaddr + (reg)); } while (0)
542 #define NETDRV_W16_F(reg, val16) do { writew ((val16), ioaddr + (reg)); readw (ioaddr + (reg)); } while (0)
543 #define NETDRV_W32_F(reg, val32) do { writel ((val32), ioaddr + (reg)); readl (ioaddr + (reg)); } while (0)
546 #if MMIO_FLUSH_AUDIT_COMPLETE
548 /* write MMIO register */
549 #define NETDRV_W8(reg, val8) writeb ((val8), ioaddr + (reg))
550 #define NETDRV_W16(reg, val16) writew ((val16), ioaddr + (reg))
551 #define NETDRV_W32(reg, val32) writel ((val32), ioaddr + (reg))
555 /* write MMIO register, then flush */
556 #define NETDRV_W8 NETDRV_W8_F
557 #define NETDRV_W16 NETDRV_W16_F
558 #define NETDRV_W32 NETDRV_W32_F
560 #endif /* MMIO_FLUSH_AUDIT_COMPLETE */
562 /* read MMIO register */
563 #define NETDRV_R8(reg) readb (ioaddr + (reg))
564 #define NETDRV_R16(reg) readw (ioaddr + (reg))
565 #define NETDRV_R32(reg) ((unsigned long) readl (ioaddr + (reg)))
567 #endif /* USE_IO_OPS */
570 static const u16 netdrv_intr_mask =
571 PCIErr | PCSTimeout | RxUnderrun | RxOverflow | RxFIFOOver |
572 TxErr | TxOK | RxErr | RxOK;
574 static const unsigned int netdrv_rx_config =
575 RxCfgEarlyRxNone | RxCfgRcv32K | RxNoWrap |
576 (RX_FIFO_THRESH << RxCfgFIFOShift) |
577 (RX_DMA_BURST << RxCfgDMAShift);
580 static int __devinit netdrv_init_board (struct pci_dev *pdev,
581 struct net_device **dev_out,
585 struct net_device *dev;
586 struct netdrv_private *tp;
588 u32 pio_start, pio_end, pio_flags, pio_len;
589 unsigned long mmio_start, mmio_end, mmio_flags, mmio_len;
594 assert (pdev != NULL);
595 assert (ioaddr_out != NULL);
600 /* dev zeroed in alloc_etherdev */
601 dev = alloc_etherdev (sizeof (*tp));
603 dev_err(&pdev->dev, "unable to alloc new ethernet\n");
604 DPRINTK ("EXIT, returning -ENOMEM\n");
607 SET_MODULE_OWNER(dev);
608 SET_NETDEV_DEV(dev, &pdev->dev);
611 /* enable device (incl. PCI PM wakeup), and bus-mastering */
612 rc = pci_enable_device (pdev);
616 pio_start = pci_resource_start (pdev, 0);
617 pio_end = pci_resource_end (pdev, 0);
618 pio_flags = pci_resource_flags (pdev, 0);
619 pio_len = pci_resource_len (pdev, 0);
621 mmio_start = pci_resource_start (pdev, 1);
622 mmio_end = pci_resource_end (pdev, 1);
623 mmio_flags = pci_resource_flags (pdev, 1);
624 mmio_len = pci_resource_len (pdev, 1);
626 /* set this immediately, we need to know before
627 * we talk to the chip directly */
628 DPRINTK("PIO region size == 0x%02X\n", pio_len);
629 DPRINTK("MMIO region size == 0x%02lX\n", mmio_len);
631 /* make sure PCI base addr 0 is PIO */
632 if (!(pio_flags & IORESOURCE_IO)) {
633 dev_err(&pdev->dev, "region #0 not a PIO resource, aborting\n");
638 /* make sure PCI base addr 1 is MMIO */
639 if (!(mmio_flags & IORESOURCE_MEM)) {
640 dev_err(&pdev->dev, "region #1 not an MMIO resource, aborting\n");
645 /* check for weird/broken PCI region reporting */
646 if ((pio_len < NETDRV_MIN_IO_SIZE) ||
647 (mmio_len < NETDRV_MIN_IO_SIZE)) {
648 dev_err(&pdev->dev, "Invalid PCI region size(s), aborting\n");
653 rc = pci_request_regions (pdev, MODNAME);
657 pci_set_master (pdev);
660 ioaddr = (void *) pio_start;
662 /* ioremap MMIO region */
663 ioaddr = ioremap (mmio_start, mmio_len);
664 if (ioaddr == NULL) {
665 dev_err(&pdev->dev, "cannot remap MMIO, aborting\n");
667 goto err_out_free_res;
669 #endif /* USE_IO_OPS */
671 /* Soft reset the chip. */
672 NETDRV_W8 (ChipCmd, (NETDRV_R8 (ChipCmd) & ChipCmdClear) | CmdReset);
674 /* Check that the chip has finished the reset. */
675 for (i = 1000; i > 0; i--)
676 if ((NETDRV_R8 (ChipCmd) & CmdReset) == 0)
681 /* Bring the chip out of low-power mode. */
682 /* <insert device-specific code here> */
685 /* sanity checks -- ensure PIO and MMIO registers agree */
686 assert (inb (pio_start+Config0) == readb (ioaddr+Config0));
687 assert (inb (pio_start+Config1) == readb (ioaddr+Config1));
688 assert (inb (pio_start+TxConfig) == readb (ioaddr+TxConfig));
689 assert (inb (pio_start+RxConfig) == readb (ioaddr+RxConfig));
690 #endif /* !USE_IO_OPS */
692 /* identify chip attached to board */
693 tmp = NETDRV_R8 (ChipVersion);
694 for (i = ARRAY_SIZE (rtl_chip_info) - 1; i >= 0; i--)
695 if (tmp == rtl_chip_info[i].version) {
700 /* if unknown chip, assume array element #0, original RTL-8139 in this case */
701 dev_printk (KERN_DEBUG, &pdev->dev,
702 "unknown chip version, assuming RTL-8139\n");
703 dev_printk (KERN_DEBUG, &pdev->dev, "TxConfig = 0x%lx\n",
704 NETDRV_R32 (TxConfig));
708 DPRINTK ("chipset id (%d) == index %d, '%s'\n",
711 rtl_chip_info[tp->chipset].name);
713 rc = register_netdev (dev);
717 DPRINTK ("EXIT, returning 0\n");
718 *ioaddr_out = ioaddr;
727 pci_release_regions (pdev);
730 DPRINTK ("EXIT, returning %d\n", rc);
735 static int __devinit netdrv_init_one (struct pci_dev *pdev,
736 const struct pci_device_id *ent)
738 struct net_device *dev = NULL;
739 struct netdrv_private *tp;
740 int i, addr_len, option;
742 static int board_idx = -1;
744 /* when built into the kernel, we only print version if device is found */
746 static int printed_version;
747 if (!printed_version++)
753 assert (pdev != NULL);
754 assert (ent != NULL);
758 i = netdrv_init_board (pdev, &dev, &ioaddr);
760 DPRINTK ("EXIT, returning %d\n", i);
766 assert (ioaddr != NULL);
767 assert (dev != NULL);
770 addr_len = read_eeprom (ioaddr, 0, 8) == 0x8129 ? 8 : 6;
771 for (i = 0; i < 3; i++)
772 ((u16 *) (dev->dev_addr))[i] =
773 le16_to_cpu (read_eeprom (ioaddr, i + 7, addr_len));
775 /* The Rtl8139-specific entries in the device structure. */
776 dev->open = netdrv_open;
777 dev->hard_start_xmit = netdrv_start_xmit;
778 dev->stop = netdrv_close;
779 dev->get_stats = netdrv_get_stats;
780 dev->set_multicast_list = netdrv_set_rx_mode;
781 dev->do_ioctl = netdrv_ioctl;
782 dev->tx_timeout = netdrv_tx_timeout;
783 dev->watchdog_timeo = TX_TIMEOUT;
785 dev->irq = pdev->irq;
786 dev->base_addr = (unsigned long) ioaddr;
788 /* dev->priv/tp zeroed and aligned in alloc_etherdev */
791 /* note: tp->chipset set in netdrv_init_board */
792 tp->drv_flags = PCI_COMMAND_IO | PCI_COMMAND_MEMORY |
793 PCI_COMMAND_MASTER | NETDRV_CAPS;
795 tp->board = ent->driver_data;
796 tp->mmio_addr = ioaddr;
797 spin_lock_init(&tp->lock);
799 pci_set_drvdata(pdev, dev);
803 printk (KERN_INFO "%s: %s at 0x%lx, "
804 "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x, "
807 board_info[ent->driver_data].name,
809 dev->dev_addr[0], dev->dev_addr[1],
810 dev->dev_addr[2], dev->dev_addr[3],
811 dev->dev_addr[4], dev->dev_addr[5],
814 printk (KERN_DEBUG "%s: Identified 8139 chip type '%s'\n",
815 dev->name, rtl_chip_info[tp->chipset].name);
817 /* Put the chip into low-power mode. */
818 NETDRV_W8_F (Cfg9346, Cfg9346_Unlock);
820 /* The lower four bits are the media type. */
821 option = (board_idx > 7) ? 0 : media[board_idx];
823 tp->full_duplex = (option & 0x200) ? 1 : 0;
824 tp->default_port = option & 15;
825 if (tp->default_port)
829 if (tp->full_duplex) {
831 "%s: Media type forced to Full Duplex.\n",
833 mdio_write (dev, tp->phys[0], MII_ADVERTISE, ADVERTISE_FULL);
837 DPRINTK ("EXIT - returning 0\n");
842 static void __devexit netdrv_remove_one (struct pci_dev *pdev)
844 struct net_device *dev = pci_get_drvdata (pdev);
845 struct netdrv_private *np;
849 assert (dev != NULL);
854 unregister_netdev (dev);
857 iounmap (np->mmio_addr);
858 #endif /* !USE_IO_OPS */
860 pci_release_regions (pdev);
864 pci_set_drvdata (pdev, NULL);
866 pci_disable_device (pdev);
872 /* Serial EEPROM section. */
874 /* EEPROM_Ctrl bits. */
875 #define EE_SHIFT_CLK 0x04 /* EEPROM shift clock. */
876 #define EE_CS 0x08 /* EEPROM chip select. */
877 #define EE_DATA_WRITE 0x02 /* EEPROM chip data in. */
878 #define EE_WRITE_0 0x00
879 #define EE_WRITE_1 0x02
880 #define EE_DATA_READ 0x01 /* EEPROM chip data out. */
881 #define EE_ENB (0x80 | EE_CS)
883 /* Delay between EEPROM clock transitions.
884 No extra delay is needed with 33Mhz PCI, but 66Mhz may change this.
887 #define eeprom_delay() readl(ee_addr)
889 /* The EEPROM commands include the alway-set leading bit. */
890 #define EE_WRITE_CMD (5)
891 #define EE_READ_CMD (6)
892 #define EE_ERASE_CMD (7)
894 static int __devinit read_eeprom (void *ioaddr, int location, int addr_len)
898 void *ee_addr = ioaddr + Cfg9346;
899 int read_cmd = location | (EE_READ_CMD << addr_len);
903 writeb (EE_ENB & ~EE_CS, ee_addr);
904 writeb (EE_ENB, ee_addr);
907 /* Shift the read command bits out. */
908 for (i = 4 + addr_len; i >= 0; i--) {
909 int dataval = (read_cmd & (1 << i)) ? EE_DATA_WRITE : 0;
910 writeb (EE_ENB | dataval, ee_addr);
912 writeb (EE_ENB | dataval | EE_SHIFT_CLK, ee_addr);
915 writeb (EE_ENB, ee_addr);
918 for (i = 16; i > 0; i--) {
919 writeb (EE_ENB | EE_SHIFT_CLK, ee_addr);
922 (retval << 1) | ((readb (ee_addr) & EE_DATA_READ) ? 1 :
924 writeb (EE_ENB, ee_addr);
928 /* Terminate the EEPROM access. */
929 writeb (~EE_CS, ee_addr);
932 DPRINTK ("EXIT - returning %d\n", retval);
936 /* MII serial management: mostly bogus for now. */
937 /* Read and write the MII management registers using software-generated
938 serial MDIO protocol.
939 The maximum data clock rate is 2.5 Mhz. The minimum timing is usually
940 met by back-to-back PCI I/O cycles, but we insert a delay to avoid
941 "overclocking" issues. */
942 #define MDIO_DIR 0x80
943 #define MDIO_DATA_OUT 0x04
944 #define MDIO_DATA_IN 0x02
945 #define MDIO_CLK 0x01
946 #define MDIO_WRITE0 (MDIO_DIR)
947 #define MDIO_WRITE1 (MDIO_DIR | MDIO_DATA_OUT)
949 #define mdio_delay() readb(mdio_addr)
952 static char mii_2_8139_map[8] = {
964 /* Syncronize the MII management interface by shifting 32 one bits out. */
965 static void mdio_sync (void *mdio_addr)
971 for (i = 32; i >= 0; i--) {
972 writeb (MDIO_WRITE1, mdio_addr);
974 writeb (MDIO_WRITE1 | MDIO_CLK, mdio_addr);
982 static int mdio_read (struct net_device *dev, int phy_id, int location)
984 struct netdrv_private *tp = dev->priv;
985 void *mdio_addr = tp->mmio_addr + Config4;
986 int mii_cmd = (0xf6 << 10) | (phy_id << 5) | location;
992 if (phy_id > 31) { /* Really a 8139. Use internal registers. */
993 DPRINTK ("EXIT after directly using 8139 internal regs\n");
994 return location < 8 && mii_2_8139_map[location] ?
995 readw (tp->mmio_addr + mii_2_8139_map[location]) : 0;
997 mdio_sync (mdio_addr);
998 /* Shift the read command bits out. */
999 for (i = 15; i >= 0; i--) {
1000 int dataval = (mii_cmd & (1 << i)) ? MDIO_DATA_OUT : 0;
1002 writeb (MDIO_DIR | dataval, mdio_addr);
1004 writeb (MDIO_DIR | dataval | MDIO_CLK, mdio_addr);
1008 /* Read the two transition, 16 data, and wire-idle bits. */
1009 for (i = 19; i > 0; i--) {
1010 writeb (0, mdio_addr);
1013 (retval << 1) | ((readb (mdio_addr) & MDIO_DATA_IN) ? 1
1015 writeb (MDIO_CLK, mdio_addr);
1019 DPRINTK ("EXIT, returning %d\n", (retval >> 1) & 0xffff);
1020 return (retval >> 1) & 0xffff;
1024 static void mdio_write (struct net_device *dev, int phy_id, int location,
1027 struct netdrv_private *tp = dev->priv;
1028 void *mdio_addr = tp->mmio_addr + Config4;
1030 (0x5002 << 16) | (phy_id << 23) | (location << 18) | value;
1033 DPRINTK ("ENTER\n");
1035 if (phy_id > 31) { /* Really a 8139. Use internal registers. */
1036 if (location < 8 && mii_2_8139_map[location]) {
1038 tp->mmio_addr + mii_2_8139_map[location]);
1039 readw (tp->mmio_addr + mii_2_8139_map[location]);
1041 DPRINTK ("EXIT after directly using 8139 internal regs\n");
1044 mdio_sync (mdio_addr);
1046 /* Shift the command bits out. */
1047 for (i = 31; i >= 0; i--) {
1049 (mii_cmd & (1 << i)) ? MDIO_WRITE1 : MDIO_WRITE0;
1050 writeb (dataval, mdio_addr);
1052 writeb (dataval | MDIO_CLK, mdio_addr);
1056 /* Clear out extra bits. */
1057 for (i = 2; i > 0; i--) {
1058 writeb (0, mdio_addr);
1060 writeb (MDIO_CLK, mdio_addr);
1068 static int netdrv_open (struct net_device *dev)
1070 struct netdrv_private *tp = dev->priv;
1073 void *ioaddr = tp->mmio_addr;
1076 DPRINTK ("ENTER\n");
1078 retval = request_irq (dev->irq, netdrv_interrupt, IRQF_SHARED, dev->name, dev);
1080 DPRINTK ("EXIT, returning %d\n", retval);
1084 tp->tx_bufs = pci_alloc_consistent(tp->pci_dev, TX_BUF_TOT_LEN,
1086 tp->rx_ring = pci_alloc_consistent(tp->pci_dev, RX_BUF_TOT_LEN,
1088 if (tp->tx_bufs == NULL || tp->rx_ring == NULL) {
1089 free_irq(dev->irq, dev);
1092 pci_free_consistent(tp->pci_dev, TX_BUF_TOT_LEN,
1093 tp->tx_bufs, tp->tx_bufs_dma);
1095 pci_free_consistent(tp->pci_dev, RX_BUF_TOT_LEN,
1096 tp->rx_ring, tp->rx_ring_dma);
1098 DPRINTK ("EXIT, returning -ENOMEM\n");
1103 tp->full_duplex = tp->duplex_lock;
1104 tp->tx_flag = (TX_FIFO_THRESH << 11) & 0x003f0000;
1106 netdrv_init_ring (dev);
1107 netdrv_hw_start (dev);
1109 DPRINTK ("%s: netdrv_open() ioaddr %#lx IRQ %d"
1110 " GP Pins %2.2x %s-duplex.\n",
1111 dev->name, pci_resource_start (tp->pci_dev, 1),
1112 dev->irq, NETDRV_R8 (MediaStatus),
1113 tp->full_duplex ? "full" : "half");
1115 /* Set the timer to switch to check for link beat and perhaps switch
1116 to an alternate media type. */
1117 init_timer (&tp->timer);
1118 tp->timer.expires = jiffies + 3 * HZ;
1119 tp->timer.data = (unsigned long) dev;
1120 tp->timer.function = &netdrv_timer;
1121 add_timer (&tp->timer);
1123 DPRINTK ("EXIT, returning 0\n");
1128 /* Start the hardware at open or resume. */
1129 static void netdrv_hw_start (struct net_device *dev)
1131 struct netdrv_private *tp = dev->priv;
1132 void *ioaddr = tp->mmio_addr;
1135 DPRINTK ("ENTER\n");
1137 /* Soft reset the chip. */
1138 NETDRV_W8 (ChipCmd, (NETDRV_R8 (ChipCmd) & ChipCmdClear) | CmdReset);
1141 /* Check that the chip has finished the reset. */
1142 for (i = 1000; i > 0; i--)
1143 if ((NETDRV_R8 (ChipCmd) & CmdReset) == 0)
1146 /* Restore our idea of the MAC address. */
1147 NETDRV_W32_F (MAC0 + 0, cpu_to_le32 (*(u32 *) (dev->dev_addr + 0)));
1148 NETDRV_W32_F (MAC0 + 4, cpu_to_le32 (*(u32 *) (dev->dev_addr + 4)));
1150 /* Must enable Tx/Rx before setting transfer thresholds! */
1151 NETDRV_W8_F (ChipCmd, (NETDRV_R8 (ChipCmd) & ChipCmdClear) |
1152 CmdRxEnb | CmdTxEnb);
1154 i = netdrv_rx_config |
1155 (NETDRV_R32 (RxConfig) & rtl_chip_info[tp->chipset].RxConfigMask);
1156 NETDRV_W32_F (RxConfig, i);
1158 /* Check this value: the documentation for IFG contradicts ifself. */
1159 NETDRV_W32 (TxConfig, (TX_DMA_BURST << TxDMAShift));
1161 /* unlock Config[01234] and BMCR register writes */
1162 NETDRV_W8_F (Cfg9346, Cfg9346_Unlock);
1167 /* Lock Config[01234] and BMCR register writes */
1168 NETDRV_W8_F (Cfg9346, Cfg9346_Lock);
1171 /* init Rx ring buffer DMA address */
1172 NETDRV_W32_F (RxBuf, tp->rx_ring_dma);
1174 /* init Tx buffer DMA addresses */
1175 for (i = 0; i < NUM_TX_DESC; i++)
1176 NETDRV_W32_F (TxAddr0 + (i * 4), tp->tx_bufs_dma + (tp->tx_buf[i] - tp->tx_bufs));
1178 NETDRV_W32_F (RxMissed, 0);
1180 netdrv_set_rx_mode (dev);
1182 /* no early-rx interrupts */
1183 NETDRV_W16 (MultiIntr, NETDRV_R16 (MultiIntr) & MultiIntrClear);
1185 /* make sure RxTx has started */
1186 NETDRV_W8_F (ChipCmd, (NETDRV_R8 (ChipCmd) & ChipCmdClear) |
1187 CmdRxEnb | CmdTxEnb);
1189 /* Enable all known interrupts by setting the interrupt mask. */
1190 NETDRV_W16_F (IntrMask, netdrv_intr_mask);
1192 netif_start_queue (dev);
1198 /* Initialize the Rx and Tx rings, along with various 'dev' bits. */
1199 static void netdrv_init_ring (struct net_device *dev)
1201 struct netdrv_private *tp = dev->priv;
1204 DPRINTK ("ENTER\n");
1207 atomic_set (&tp->cur_tx, 0);
1208 atomic_set (&tp->dirty_tx, 0);
1210 for (i = 0; i < NUM_TX_DESC; i++) {
1211 tp->tx_info[i].skb = NULL;
1212 tp->tx_info[i].mapping = 0;
1213 tp->tx_buf[i] = &tp->tx_bufs[i * TX_BUF_SIZE];
1220 static void netdrv_timer (unsigned long data)
1222 struct net_device *dev = (struct net_device *) data;
1223 struct netdrv_private *tp = dev->priv;
1224 void *ioaddr = tp->mmio_addr;
1225 int next_tick = 60 * HZ;
1228 mii_lpa = mdio_read (dev, tp->phys[0], MII_LPA);
1230 if (!tp->duplex_lock && mii_lpa != 0xffff) {
1231 int duplex = (mii_lpa & LPA_100FULL)
1232 || (mii_lpa & 0x01C0) == 0x0040;
1233 if (tp->full_duplex != duplex) {
1234 tp->full_duplex = duplex;
1236 "%s: Setting %s-duplex based on MII #%d link"
1237 " partner ability of %4.4x.\n", dev->name,
1238 tp->full_duplex ? "full" : "half",
1239 tp->phys[0], mii_lpa);
1240 NETDRV_W8 (Cfg9346, Cfg9346_Unlock);
1241 NETDRV_W8 (Config1, tp->full_duplex ? 0x60 : 0x20);
1242 NETDRV_W8 (Cfg9346, Cfg9346_Lock);
1246 DPRINTK ("%s: Media selection tick, Link partner %4.4x.\n",
1247 dev->name, NETDRV_R16 (NWayLPAR));
1248 DPRINTK ("%s: Other registers are IntMask %4.4x IntStatus %4.4x"
1249 " RxStatus %4.4x.\n", dev->name,
1250 NETDRV_R16 (IntrMask),
1251 NETDRV_R16 (IntrStatus),
1252 NETDRV_R32 (RxEarlyStatus));
1253 DPRINTK ("%s: Chip config %2.2x %2.2x.\n",
1254 dev->name, NETDRV_R8 (Config0),
1255 NETDRV_R8 (Config1));
1257 tp->timer.expires = jiffies + next_tick;
1258 add_timer (&tp->timer);
1262 static void netdrv_tx_clear (struct netdrv_private *tp)
1266 atomic_set (&tp->cur_tx, 0);
1267 atomic_set (&tp->dirty_tx, 0);
1269 /* Dump the unsent Tx packets. */
1270 for (i = 0; i < NUM_TX_DESC; i++) {
1271 struct ring_info *rp = &tp->tx_info[i];
1272 if (rp->mapping != 0) {
1273 pci_unmap_single (tp->pci_dev, rp->mapping,
1274 rp->skb->len, PCI_DMA_TODEVICE);
1278 dev_kfree_skb (rp->skb);
1280 tp->stats.tx_dropped++;
1286 static void netdrv_tx_timeout (struct net_device *dev)
1288 struct netdrv_private *tp = dev->priv;
1289 void *ioaddr = tp->mmio_addr;
1292 unsigned long flags;
1294 DPRINTK ("%s: Transmit timeout, status %2.2x %4.4x "
1295 "media %2.2x.\n", dev->name,
1296 NETDRV_R8 (ChipCmd),
1297 NETDRV_R16 (IntrStatus),
1298 NETDRV_R8 (MediaStatus));
1300 /* disable Tx ASAP, if not already */
1301 tmp8 = NETDRV_R8 (ChipCmd);
1302 if (tmp8 & CmdTxEnb)
1303 NETDRV_W8 (ChipCmd, tmp8 & ~CmdTxEnb);
1305 /* Disable interrupts by clearing the interrupt mask. */
1306 NETDRV_W16 (IntrMask, 0x0000);
1308 /* Emit info to figure out what went wrong. */
1309 printk (KERN_DEBUG "%s: Tx queue start entry %d dirty entry %d.\n",
1310 dev->name, atomic_read (&tp->cur_tx),
1311 atomic_read (&tp->dirty_tx));
1312 for (i = 0; i < NUM_TX_DESC; i++)
1313 printk (KERN_DEBUG "%s: Tx descriptor %d is %8.8lx.%s\n",
1314 dev->name, i, NETDRV_R32 (TxStatus0 + (i * 4)),
1315 i == atomic_read (&tp->dirty_tx) % NUM_TX_DESC ?
1316 " (queue head)" : "");
1318 /* Stop a shared interrupt from scavenging while we are. */
1319 spin_lock_irqsave (&tp->lock, flags);
1321 netdrv_tx_clear (tp);
1323 spin_unlock_irqrestore (&tp->lock, flags);
1325 /* ...and finally, reset everything */
1326 netdrv_hw_start (dev);
1328 netif_wake_queue (dev);
1333 static int netdrv_start_xmit (struct sk_buff *skb, struct net_device *dev)
1335 struct netdrv_private *tp = dev->priv;
1336 void *ioaddr = tp->mmio_addr;
1339 /* Calculate the next Tx descriptor entry. */
1340 entry = atomic_read (&tp->cur_tx) % NUM_TX_DESC;
1342 assert (tp->tx_info[entry].skb == NULL);
1343 assert (tp->tx_info[entry].mapping == 0);
1345 tp->tx_info[entry].skb = skb;
1346 /* tp->tx_info[entry].mapping = 0; */
1347 skb_copy_from_linear_data(skb, tp->tx_buf[entry], skb->len);
1349 /* Note: the chip doesn't have auto-pad! */
1350 NETDRV_W32 (TxStatus0 + (entry * sizeof(u32)),
1351 tp->tx_flag | (skb->len >= ETH_ZLEN ? skb->len : ETH_ZLEN));
1353 dev->trans_start = jiffies;
1354 atomic_inc (&tp->cur_tx);
1355 if ((atomic_read (&tp->cur_tx) - atomic_read (&tp->dirty_tx)) >= NUM_TX_DESC)
1356 netif_stop_queue (dev);
1358 DPRINTK ("%s: Queued Tx packet at %p size %u to slot %d.\n",
1359 dev->name, skb->data, skb->len, entry);
1365 static void netdrv_tx_interrupt (struct net_device *dev,
1366 struct netdrv_private *tp,
1369 int cur_tx, dirty_tx, tx_left;
1371 assert (dev != NULL);
1372 assert (tp != NULL);
1373 assert (ioaddr != NULL);
1375 dirty_tx = atomic_read (&tp->dirty_tx);
1377 cur_tx = atomic_read (&tp->cur_tx);
1378 tx_left = cur_tx - dirty_tx;
1379 while (tx_left > 0) {
1380 int entry = dirty_tx % NUM_TX_DESC;
1383 txstatus = NETDRV_R32 (TxStatus0 + (entry * sizeof (u32)));
1385 if (!(txstatus & (TxStatOK | TxUnderrun | TxAborted)))
1386 break; /* It still hasn't been Txed */
1388 /* Note: TxCarrierLost is always asserted at 100mbps. */
1389 if (txstatus & (TxOutOfWindow | TxAborted)) {
1390 /* There was an major error, log it. */
1391 DPRINTK ("%s: Transmit error, Tx status %8.8x.\n",
1392 dev->name, txstatus);
1393 tp->stats.tx_errors++;
1394 if (txstatus & TxAborted) {
1395 tp->stats.tx_aborted_errors++;
1396 NETDRV_W32 (TxConfig, TxClearAbt | (TX_DMA_BURST << TxDMAShift));
1398 if (txstatus & TxCarrierLost)
1399 tp->stats.tx_carrier_errors++;
1400 if (txstatus & TxOutOfWindow)
1401 tp->stats.tx_window_errors++;
1403 if (txstatus & TxUnderrun) {
1404 /* Add 64 to the Tx FIFO threshold. */
1405 if (tp->tx_flag < 0x00300000)
1406 tp->tx_flag += 0x00020000;
1407 tp->stats.tx_fifo_errors++;
1409 tp->stats.collisions += (txstatus >> 24) & 15;
1410 tp->stats.tx_bytes += txstatus & 0x7ff;
1411 tp->stats.tx_packets++;
1414 /* Free the original skb. */
1415 if (tp->tx_info[entry].mapping != 0) {
1416 pci_unmap_single(tp->pci_dev,
1417 tp->tx_info[entry].mapping,
1418 tp->tx_info[entry].skb->len,
1420 tp->tx_info[entry].mapping = 0;
1422 dev_kfree_skb_irq (tp->tx_info[entry].skb);
1423 tp->tx_info[entry].skb = NULL;
1425 if (dirty_tx < 0) { /* handle signed int overflow */
1426 atomic_sub (cur_tx, &tp->cur_tx); /* XXX racy? */
1427 dirty_tx = cur_tx - tx_left + 1;
1429 if (netif_queue_stopped (dev))
1430 netif_wake_queue (dev);
1432 cur_tx = atomic_read (&tp->cur_tx);
1433 tx_left = cur_tx - dirty_tx;
1437 #ifndef NETDRV_NDEBUG
1438 if (atomic_read (&tp->cur_tx) - dirty_tx > NUM_TX_DESC) {
1440 "%s: Out-of-sync dirty pointer, %d vs. %d.\n",
1441 dev->name, dirty_tx, atomic_read (&tp->cur_tx));
1442 dirty_tx += NUM_TX_DESC;
1444 #endif /* NETDRV_NDEBUG */
1446 atomic_set (&tp->dirty_tx, dirty_tx);
1450 /* TODO: clean this up! Rx reset need not be this intensive */
1451 static void netdrv_rx_err (u32 rx_status, struct net_device *dev,
1452 struct netdrv_private *tp, void *ioaddr)
1455 int tmp_work = 1000;
1457 DPRINTK ("%s: Ethernet frame had errors, status %8.8x.\n",
1458 dev->name, rx_status);
1459 if (rx_status & RxTooLong) {
1460 DPRINTK ("%s: Oversized Ethernet frame, status %4.4x!\n",
1461 dev->name, rx_status);
1462 /* A.C.: The chip hangs here. */
1464 tp->stats.rx_errors++;
1465 if (rx_status & (RxBadSymbol | RxBadAlign))
1466 tp->stats.rx_frame_errors++;
1467 if (rx_status & (RxRunt | RxTooLong))
1468 tp->stats.rx_length_errors++;
1469 if (rx_status & RxCRCErr)
1470 tp->stats.rx_crc_errors++;
1471 /* Reset the receiver, based on RealTek recommendation. (Bug?) */
1474 /* disable receive */
1475 tmp8 = NETDRV_R8 (ChipCmd) & ChipCmdClear;
1476 NETDRV_W8_F (ChipCmd, tmp8 | CmdTxEnb);
1478 /* A.C.: Reset the multicast list. */
1479 netdrv_set_rx_mode (dev);
1481 /* XXX potentially temporary hack to
1482 * restart hung receiver */
1483 while (--tmp_work > 0) {
1484 tmp8 = NETDRV_R8 (ChipCmd);
1485 if ((tmp8 & CmdRxEnb) && (tmp8 & CmdTxEnb))
1487 NETDRV_W8_F (ChipCmd,
1488 (tmp8 & ChipCmdClear) | CmdRxEnb | CmdTxEnb);
1491 /* G.S.: Re-enable receiver */
1492 /* XXX temporary hack to work around receiver hang */
1493 netdrv_set_rx_mode (dev);
1496 printk (KERN_WARNING PFX "tx/rx enable wait too long\n");
1500 /* The data sheet doesn't describe the Rx ring at all, so I'm guessing at the
1501 field alignments and semantics. */
1502 static void netdrv_rx_interrupt (struct net_device *dev,
1503 struct netdrv_private *tp, void *ioaddr)
1505 unsigned char *rx_ring;
1508 assert (dev != NULL);
1509 assert (tp != NULL);
1510 assert (ioaddr != NULL);
1512 rx_ring = tp->rx_ring;
1513 cur_rx = tp->cur_rx;
1515 DPRINTK ("%s: In netdrv_rx(), current %4.4x BufAddr %4.4x,"
1516 " free to %4.4x, Cmd %2.2x.\n", dev->name, cur_rx,
1517 NETDRV_R16 (RxBufAddr),
1518 NETDRV_R16 (RxBufPtr), NETDRV_R8 (ChipCmd));
1520 while ((NETDRV_R8 (ChipCmd) & RxBufEmpty) == 0) {
1521 int ring_offset = cur_rx % RX_BUF_LEN;
1523 unsigned int rx_size;
1524 unsigned int pkt_size;
1525 struct sk_buff *skb;
1527 /* read size+status of next frame from DMA ring buffer */
1528 rx_status = le32_to_cpu (*(u32 *) (rx_ring + ring_offset));
1529 rx_size = rx_status >> 16;
1530 pkt_size = rx_size - 4;
1532 DPRINTK ("%s: netdrv_rx() status %4.4x, size %4.4x,"
1533 " cur %4.4x.\n", dev->name, rx_status,
1535 #if NETDRV_DEBUG > 2
1538 DPRINTK ("%s: Frame contents ", dev->name);
1539 for (i = 0; i < 70; i++)
1541 rx_ring[ring_offset + i]);
1546 /* If Rx err or invalid rx_size/rx_status received
1547 * (which happens if we get lost in the ring),
1548 * Rx process gets reset, so we abort any further
1551 if ((rx_size > (MAX_ETH_FRAME_SIZE+4)) ||
1552 (!(rx_status & RxStatusOK))) {
1553 netdrv_rx_err (rx_status, dev, tp, ioaddr);
1557 /* Malloc up new buffer, compatible with net-2e. */
1558 /* Omit the four octet CRC from the length. */
1560 /* TODO: consider allocating skb's outside of
1561 * interrupt context, both to speed interrupt processing,
1562 * and also to reduce the chances of having to
1563 * drop packets here under memory pressure.
1566 skb = dev_alloc_skb (pkt_size + 2);
1568 skb_reserve (skb, 2); /* 16 byte align the IP fields. */
1570 skb_copy_to_linear_data (skb, &rx_ring[ring_offset + 4], pkt_size);
1571 skb_put (skb, pkt_size);
1573 skb->protocol = eth_type_trans (skb, dev);
1575 dev->last_rx = jiffies;
1576 tp->stats.rx_bytes += pkt_size;
1577 tp->stats.rx_packets++;
1579 printk (KERN_WARNING
1580 "%s: Memory squeeze, dropping packet.\n",
1582 tp->stats.rx_dropped++;
1585 cur_rx = (cur_rx + rx_size + 4 + 3) & ~3;
1586 NETDRV_W16_F (RxBufPtr, cur_rx - 16);
1589 DPRINTK ("%s: Done netdrv_rx(), current %4.4x BufAddr %4.4x,"
1590 " free to %4.4x, Cmd %2.2x.\n", dev->name, cur_rx,
1591 NETDRV_R16 (RxBufAddr),
1592 NETDRV_R16 (RxBufPtr), NETDRV_R8 (ChipCmd));
1594 tp->cur_rx = cur_rx;
1598 static void netdrv_weird_interrupt (struct net_device *dev,
1599 struct netdrv_private *tp,
1601 int status, int link_changed)
1603 printk (KERN_DEBUG "%s: Abnormal interrupt, status %8.8x.\n",
1606 assert (dev != NULL);
1607 assert (tp != NULL);
1608 assert (ioaddr != NULL);
1610 /* Update the error count. */
1611 tp->stats.rx_missed_errors += NETDRV_R32 (RxMissed);
1612 NETDRV_W32 (RxMissed, 0);
1614 if ((status & RxUnderrun) && link_changed &&
1615 (tp->drv_flags & HAS_LNK_CHNG)) {
1616 /* Really link-change on new chips. */
1617 int lpar = NETDRV_R16 (NWayLPAR);
1618 int duplex = (lpar & 0x0100) || (lpar & 0x01C0) == 0x0040
1620 if (tp->full_duplex != duplex) {
1621 tp->full_duplex = duplex;
1622 NETDRV_W8 (Cfg9346, Cfg9346_Unlock);
1623 NETDRV_W8 (Config1, tp->full_duplex ? 0x60 : 0x20);
1624 NETDRV_W8 (Cfg9346, Cfg9346_Lock);
1626 status &= ~RxUnderrun;
1629 /* XXX along with netdrv_rx_err, are we double-counting errors? */
1631 (RxUnderrun | RxOverflow | RxErr | RxFIFOOver))
1632 tp->stats.rx_errors++;
1634 if (status & (PCSTimeout))
1635 tp->stats.rx_length_errors++;
1636 if (status & (RxUnderrun | RxFIFOOver))
1637 tp->stats.rx_fifo_errors++;
1638 if (status & RxOverflow) {
1639 tp->stats.rx_over_errors++;
1640 tp->cur_rx = NETDRV_R16 (RxBufAddr) % RX_BUF_LEN;
1641 NETDRV_W16_F (RxBufPtr, tp->cur_rx - 16);
1643 if (status & PCIErr) {
1645 pci_read_config_word (tp->pci_dev, PCI_STATUS, &pci_cmd_status);
1647 printk (KERN_ERR "%s: PCI Bus error %4.4x.\n",
1648 dev->name, pci_cmd_status);
1653 /* The interrupt handler does all of the Rx thread work and cleans up
1654 after the Tx thread. */
1655 static irqreturn_t netdrv_interrupt (int irq, void *dev_instance)
1657 struct net_device *dev = (struct net_device *) dev_instance;
1658 struct netdrv_private *tp = dev->priv;
1659 int boguscnt = max_interrupt_work;
1660 void *ioaddr = tp->mmio_addr;
1661 int status = 0, link_changed = 0; /* avoid bogus "uninit" warning */
1664 spin_lock (&tp->lock);
1667 status = NETDRV_R16 (IntrStatus);
1669 /* h/w no longer present (hotplug?) or major error, bail */
1670 if (status == 0xFFFF)
1674 /* Acknowledge all of the current interrupt sources ASAP */
1675 NETDRV_W16_F (IntrStatus, status);
1677 DPRINTK ("%s: interrupt status=%#4.4x new intstat=%#4.4x.\n",
1679 NETDRV_R16 (IntrStatus));
1682 (PCIErr | PCSTimeout | RxUnderrun | RxOverflow |
1683 RxFIFOOver | TxErr | TxOK | RxErr | RxOK)) == 0)
1686 /* Check uncommon events with one test. */
1687 if (status & (PCIErr | PCSTimeout | RxUnderrun | RxOverflow |
1688 RxFIFOOver | TxErr | RxErr))
1689 netdrv_weird_interrupt (dev, tp, ioaddr,
1690 status, link_changed);
1692 if (status & (RxOK | RxUnderrun | RxOverflow | RxFIFOOver)) /* Rx interrupt */
1693 netdrv_rx_interrupt (dev, tp, ioaddr);
1695 if (status & (TxOK | TxErr))
1696 netdrv_tx_interrupt (dev, tp, ioaddr);
1699 } while (boguscnt > 0);
1701 if (boguscnt <= 0) {
1702 printk (KERN_WARNING
1703 "%s: Too much work at interrupt, "
1704 "IntrStatus=0x%4.4x.\n", dev->name,
1707 /* Clear all interrupt sources. */
1708 NETDRV_W16 (IntrStatus, 0xffff);
1711 spin_unlock (&tp->lock);
1713 DPRINTK ("%s: exiting interrupt, intr_status=%#4.4x.\n",
1714 dev->name, NETDRV_R16 (IntrStatus));
1715 return IRQ_RETVAL(handled);
1719 static int netdrv_close (struct net_device *dev)
1721 struct netdrv_private *tp = dev->priv;
1722 void *ioaddr = tp->mmio_addr;
1723 unsigned long flags;
1725 DPRINTK ("ENTER\n");
1727 netif_stop_queue (dev);
1729 DPRINTK ("%s: Shutting down ethercard, status was 0x%4.4x.\n",
1730 dev->name, NETDRV_R16 (IntrStatus));
1732 del_timer_sync (&tp->timer);
1734 spin_lock_irqsave (&tp->lock, flags);
1736 /* Stop the chip's Tx and Rx DMA processes. */
1737 NETDRV_W8 (ChipCmd, (NETDRV_R8 (ChipCmd) & ChipCmdClear));
1739 /* Disable interrupts by clearing the interrupt mask. */
1740 NETDRV_W16 (IntrMask, 0x0000);
1742 /* Update the error counts. */
1743 tp->stats.rx_missed_errors += NETDRV_R32 (RxMissed);
1744 NETDRV_W32 (RxMissed, 0);
1746 spin_unlock_irqrestore (&tp->lock, flags);
1749 free_irq (dev->irq, dev);
1751 netdrv_tx_clear (tp);
1753 pci_free_consistent(tp->pci_dev, RX_BUF_TOT_LEN,
1754 tp->rx_ring, tp->rx_ring_dma);
1755 pci_free_consistent(tp->pci_dev, TX_BUF_TOT_LEN,
1756 tp->tx_bufs, tp->tx_bufs_dma);
1760 /* Green! Put the chip in low-power mode. */
1761 NETDRV_W8 (Cfg9346, Cfg9346_Unlock);
1762 NETDRV_W8 (Config1, 0x03);
1763 NETDRV_W8 (Cfg9346, Cfg9346_Lock);
1770 static int netdrv_ioctl (struct net_device *dev, struct ifreq *rq, int cmd)
1772 struct netdrv_private *tp = dev->priv;
1773 struct mii_ioctl_data *data = if_mii(rq);
1774 unsigned long flags;
1777 DPRINTK ("ENTER\n");
1780 case SIOCGMIIPHY: /* Get address of MII PHY in use. */
1781 data->phy_id = tp->phys[0] & 0x3f;
1784 case SIOCGMIIREG: /* Read MII PHY register. */
1785 spin_lock_irqsave (&tp->lock, flags);
1786 data->val_out = mdio_read (dev, data->phy_id & 0x1f, data->reg_num & 0x1f);
1787 spin_unlock_irqrestore (&tp->lock, flags);
1790 case SIOCSMIIREG: /* Write MII PHY register. */
1791 if (!capable (CAP_NET_ADMIN)) {
1796 spin_lock_irqsave (&tp->lock, flags);
1797 mdio_write (dev, data->phy_id & 0x1f, data->reg_num & 0x1f, data->val_in);
1798 spin_unlock_irqrestore (&tp->lock, flags);
1806 DPRINTK ("EXIT, returning %d\n", rc);
1811 static struct net_device_stats *netdrv_get_stats (struct net_device *dev)
1813 struct netdrv_private *tp = dev->priv;
1814 void *ioaddr = tp->mmio_addr;
1816 DPRINTK ("ENTER\n");
1818 assert (tp != NULL);
1820 if (netif_running(dev)) {
1821 unsigned long flags;
1823 spin_lock_irqsave (&tp->lock, flags);
1825 tp->stats.rx_missed_errors += NETDRV_R32 (RxMissed);
1826 NETDRV_W32 (RxMissed, 0);
1828 spin_unlock_irqrestore (&tp->lock, flags);
1835 /* Set or clear the multicast filter for this adaptor.
1836 This routine is not state sensitive and need not be SMP locked. */
1838 static void netdrv_set_rx_mode (struct net_device *dev)
1840 struct netdrv_private *tp = dev->priv;
1841 void *ioaddr = tp->mmio_addr;
1842 u32 mc_filter[2]; /* Multicast hash filter */
1846 DPRINTK ("ENTER\n");
1848 DPRINTK ("%s: netdrv_set_rx_mode(%4.4x) done -- Rx config %8.8x.\n",
1849 dev->name, dev->flags, NETDRV_R32 (RxConfig));
1851 /* Note: do not reorder, GCC is clever about common statements. */
1852 if (dev->flags & IFF_PROMISC) {
1854 AcceptBroadcast | AcceptMulticast | AcceptMyPhys |
1856 mc_filter[1] = mc_filter[0] = 0xffffffff;
1857 } else if ((dev->mc_count > multicast_filter_limit)
1858 || (dev->flags & IFF_ALLMULTI)) {
1859 /* Too many to filter perfectly -- accept all multicasts. */
1860 rx_mode = AcceptBroadcast | AcceptMulticast | AcceptMyPhys;
1861 mc_filter[1] = mc_filter[0] = 0xffffffff;
1863 struct dev_mc_list *mclist;
1864 rx_mode = AcceptBroadcast | AcceptMulticast | AcceptMyPhys;
1865 mc_filter[1] = mc_filter[0] = 0;
1866 for (i = 0, mclist = dev->mc_list; mclist && i < dev->mc_count;
1867 i++, mclist = mclist->next) {
1868 int bit_nr = ether_crc(ETH_ALEN, mclist->dmi_addr) >> 26;
1870 mc_filter[bit_nr >> 5] |= 1 << (bit_nr & 31);
1874 /* if called from irq handler, lock already acquired */
1876 spin_lock_irq (&tp->lock);
1878 /* We can safely update without stopping the chip. */
1879 tmp = netdrv_rx_config | rx_mode |
1880 (NETDRV_R32 (RxConfig) & rtl_chip_info[tp->chipset].RxConfigMask);
1881 NETDRV_W32_F (RxConfig, tmp);
1882 NETDRV_W32_F (MAR0 + 0, mc_filter[0]);
1883 NETDRV_W32_F (MAR0 + 4, mc_filter[1]);
1886 spin_unlock_irq (&tp->lock);
1894 static int netdrv_suspend (struct pci_dev *pdev, pm_message_t state)
1896 struct net_device *dev = pci_get_drvdata (pdev);
1897 struct netdrv_private *tp = dev->priv;
1898 void *ioaddr = tp->mmio_addr;
1899 unsigned long flags;
1901 if (!netif_running(dev))
1903 netif_device_detach (dev);
1905 spin_lock_irqsave (&tp->lock, flags);
1907 /* Disable interrupts, stop Tx and Rx. */
1908 NETDRV_W16 (IntrMask, 0x0000);
1909 NETDRV_W8 (ChipCmd, (NETDRV_R8 (ChipCmd) & ChipCmdClear));
1911 /* Update the error counts. */
1912 tp->stats.rx_missed_errors += NETDRV_R32 (RxMissed);
1913 NETDRV_W32 (RxMissed, 0);
1915 spin_unlock_irqrestore (&tp->lock, flags);
1917 pci_save_state (pdev);
1918 pci_set_power_state (pdev, PCI_D3hot);
1924 static int netdrv_resume (struct pci_dev *pdev)
1926 struct net_device *dev = pci_get_drvdata (pdev);
1927 struct netdrv_private *tp = dev->priv;
1929 if (!netif_running(dev))
1931 pci_set_power_state (pdev, PCI_D0);
1932 pci_restore_state (pdev);
1933 netif_device_attach (dev);
1934 netdrv_hw_start (dev);
1939 #endif /* CONFIG_PM */
1942 static struct pci_driver netdrv_pci_driver = {
1944 .id_table = netdrv_pci_tbl,
1945 .probe = netdrv_init_one,
1946 .remove = __devexit_p(netdrv_remove_one),
1948 .suspend = netdrv_suspend,
1949 .resume = netdrv_resume,
1950 #endif /* CONFIG_PM */
1954 static int __init netdrv_init_module (void)
1956 /* when a module, this is printed whether or not devices are found in probe */
1960 return pci_register_driver(&netdrv_pci_driver);
1964 static void __exit netdrv_cleanup_module (void)
1966 pci_unregister_driver (&netdrv_pci_driver);
1970 module_init(netdrv_init_module);
1971 module_exit(netdrv_cleanup_module);