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/config.h>
89 #include <linux/module.h>
90 #include <linux/kernel.h>
91 #include <linux/pci.h>
92 #include <linux/init.h>
93 #include <linux/ioport.h>
94 #include <linux/netdevice.h>
95 #include <linux/etherdevice.h>
96 #include <linux/delay.h>
97 #include <linux/ethtool.h>
98 #include <linux/mii.h>
99 #include <linux/crc32.h>
102 #define NETDRV_VERSION "1.0.0"
103 #define MODNAME "netdrv"
104 #define NETDRV_DRIVER_LOAD_MSG "MyVendor Fast Ethernet driver " NETDRV_VERSION " loaded"
105 #define PFX MODNAME ": "
107 static char version[] __devinitdata =
108 KERN_INFO NETDRV_DRIVER_LOAD_MSG "\n"
109 KERN_INFO " Support available from http://foo.com/bar/baz.html\n";
111 /* define to 1 to enable PIO instead of MMIO */
114 /* define to 1 to enable copious debugging info */
117 /* define to 1 to disable lightweight runtime debugging checks */
122 /* note: prints function name for you */
123 # define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __FUNCTION__ , ## args)
125 # define DPRINTK(fmt, args...)
129 # define assert(expr) do {} while (0)
131 # define assert(expr) \
133 printk( "Assertion failed! %s,%s,%s,line=%d\n", \
134 #expr,__FILE__,__FUNCTION__,__LINE__); \
139 /* A few user-configurable values. */
141 static int media[] = {-1, -1, -1, -1, -1, -1, -1, -1};
143 /* Maximum events (Rx packets, etc.) to handle at each interrupt. */
144 static int max_interrupt_work = 20;
146 /* Maximum number of multicast addresses to filter (vs. Rx-all-multicast).
147 The RTL chips use a 64 element hash table based on the Ethernet CRC. */
148 static int multicast_filter_limit = 32;
150 /* Size of the in-memory receive ring. */
151 #define RX_BUF_LEN_IDX 2 /* 0==8K, 1==16K, 2==32K, 3==64K */
152 #define RX_BUF_LEN (8192 << RX_BUF_LEN_IDX)
153 #define RX_BUF_PAD 16
154 #define RX_BUF_WRAP_PAD 2048 /* spare padding to handle lack of packet wrap */
155 #define RX_BUF_TOT_LEN (RX_BUF_LEN + RX_BUF_PAD + RX_BUF_WRAP_PAD)
157 /* Number of Tx descriptor registers. */
158 #define NUM_TX_DESC 4
160 /* max supported ethernet frame size -- must be at least (dev->mtu+14+4).*/
161 #define MAX_ETH_FRAME_SIZE 1536
163 /* Size of the Tx bounce buffers -- must be at least (dev->mtu+14+4). */
164 #define TX_BUF_SIZE MAX_ETH_FRAME_SIZE
165 #define TX_BUF_TOT_LEN (TX_BUF_SIZE * NUM_TX_DESC)
167 /* PCI Tuning Parameters
168 Threshold is bytes transferred to chip before transmission starts. */
169 #define TX_FIFO_THRESH 256 /* In bytes, rounded down to 32 byte units. */
171 /* The following settings are log_2(bytes)-4: 0 == 16 bytes .. 6==1024, 7==end of packet. */
172 #define RX_FIFO_THRESH 6 /* Rx buffer level before first PCI xfer. */
173 #define RX_DMA_BURST 6 /* Maximum PCI burst, '6' is 1024 */
174 #define TX_DMA_BURST 6 /* Maximum PCI burst, '6' is 1024 */
177 /* Operational parameters that usually are not changed. */
178 /* Time in jiffies before concluding the transmitter is hung. */
179 #define TX_TIMEOUT (6*HZ)
183 HAS_CHIP_XCVR = 0x020000,
184 HAS_LNK_CHNG = 0x040000,
187 #define NETDRV_MIN_IO_SIZE 0x80
188 #define RTL8139B_IO_SIZE 256
190 #define NETDRV_CAPS HAS_CHIP_XCVR|HAS_LNK_CHNG
202 /* indexed by board_t, above */
205 } board_info[] __devinitdata = {
206 { "RealTek RTL8139 Fast Ethernet" },
207 { "RealTek RTL8139B PCI/CardBus" },
208 { "SMC1211TX EZCard 10/100 (RealTek RTL8139)" },
209 /* { MPX5030, "Accton MPX5030 (RealTek RTL8139)" },*/
210 { "Delta Electronics 8139 10/100BaseTX" },
211 { "Addtron Technolgy 8139 10/100BaseTX" },
215 static struct pci_device_id netdrv_pci_tbl[] = {
216 {0x10ec, 0x8139, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
217 {0x10ec, 0x8138, PCI_ANY_ID, PCI_ANY_ID, 0, 0, NETDRV_CB },
218 {0x1113, 0x1211, PCI_ANY_ID, PCI_ANY_ID, 0, 0, SMC1211TX },
219 /* {0x1113, 0x1211, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MPX5030 },*/
220 {0x1500, 0x1360, PCI_ANY_ID, PCI_ANY_ID, 0, 0, DELTA8139 },
221 {0x4033, 0x1360, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ADDTRON8139 },
224 MODULE_DEVICE_TABLE (pci, netdrv_pci_tbl);
227 /* The rest of these values should never change. */
229 /* Symbolic offsets to registers. */
230 enum NETDRV_registers {
231 MAC0 = 0, /* Ethernet hardware address. */
232 MAR0 = 8, /* Multicast filter. */
233 TxStatus0 = 0x10, /* Transmit status (Four 32bit registers). */
234 TxAddr0 = 0x20, /* Tx descriptors (also four 32bit). */
237 RxEarlyStatus = 0x36,
246 Timer = 0x48, /* A general-purpose counter. */
247 RxMissed = 0x4C, /* 24 bits valid, write clears. */
254 Config4 = 0x5A, /* absent on RTL-8139A */
258 BasicModeCtrl = 0x62,
259 BasicModeStatus = 0x64,
262 NWayExpansion = 0x6A,
263 /* Undocumented registers, but required for proper operation. */
264 FIFOTMS = 0x70, /* FIFO Control and test. */
265 CSCR = 0x74, /* Chip Status and Configuration Register. */
267 PARA7c = 0x7c, /* Magic transceiver parameter register. */
268 Config5 = 0xD8, /* absent on RTL-8139A */
272 MultiIntrClear = 0xF000,
274 Config1Clear = (1<<7)|(1<<6)|(1<<3)|(1<<2)|(1<<1),
284 /* Interrupt register bits, using my own meaningful names. */
285 enum IntrStatusBits {
300 TxOutOfWindow = 0x20000000,
301 TxAborted = 0x40000000,
302 TxCarrierLost = 0x80000000,
305 RxMulticast = 0x8000,
307 RxBroadcast = 0x2000,
308 RxBadSymbol = 0x0020,
316 /* Bits in RxConfig. */
320 AcceptBroadcast = 0x08,
321 AcceptMulticast = 0x04,
323 AcceptAllPhys = 0x01,
326 /* Bits in TxConfig. */
327 enum tx_config_bits {
328 TxIFG1 = (1 << 25), /* Interframe Gap Time */
329 TxIFG0 = (1 << 24), /* Enabling these bits violates IEEE 802.3 */
330 TxLoopBack = (1 << 18) | (1 << 17), /* enable loopback test mode */
331 TxCRC = (1 << 16), /* DISABLE appending CRC to end of Tx packets */
332 TxClearAbt = (1 << 0), /* Clear abort (WO) */
333 TxDMAShift = 8, /* DMA burst value (0-7) is shift this many bits */
335 TxVersionMask = 0x7C800000, /* mask out version bits 30-26, 23 */
338 /* Bits in Config1 */
340 Cfg1_PM_Enable = 0x01,
341 Cfg1_VPD_Enable = 0x02,
345 Cfg1_Driver_Load = 0x20,
351 /* Early Rx threshold, none or X/16 */
352 RxCfgEarlyRxNone = 0,
353 RxCfgEarlyRxShift = 24,
355 /* rx fifo threshold */
357 RxCfgFIFONone = (7 << RxCfgFIFOShift),
361 RxCfgDMAUnlimited = (7 << RxCfgDMAShift),
363 /* rx ring buffer length */
365 RxCfgRcv16K = (1 << 11),
366 RxCfgRcv32K = (1 << 12),
367 RxCfgRcv64K = (1 << 11) | (1 << 12),
369 /* Disable packet wrap at end of Rx buffer */
374 /* Twister tuning parameters from RealTek.
375 Completely undocumented, but required to tune bad links. */
377 CSCR_LinkOKBit = 0x0400,
378 CSCR_LinkChangeBit = 0x0800,
379 CSCR_LinkStatusBits = 0x0f000,
380 CSCR_LinkDownOffCmd = 0x003c0,
381 CSCR_LinkDownCmd = 0x0f3c0,
387 Cfg9346_Unlock = 0xC0,
391 #define PARA78_default 0x78fa8388
392 #define PARA7c_default 0xcb38de43 /* param[0][3] */
393 #define PARA7c_xxx 0xcb38de43
394 static const unsigned long param[4][4] = {
395 {0xcb39de43, 0xcb39ce43, 0xfb38de03, 0xcb38de43},
396 {0xcb39de43, 0xcb39ce43, 0xcb39ce83, 0xcb39ce83},
397 {0xcb39de43, 0xcb39ce43, 0xcb39ce83, 0xcb39ce83},
398 {0xbb39de43, 0xbb39ce43, 0xbb39ce83, 0xbb39ce83}
417 /* directly indexed by chip_t, above */
418 static const struct {
420 u8 version; /* from RTL8139C docs */
421 u32 RxConfigMask; /* should clear the bits supported by this chip */
422 } rtl_chip_info[] = {
425 0xf0fe0040, /* XXX copied from RTL8139A, verify */
445 0xf0fe0040, /* XXX copied from RTL8139A, verify */
450 0xf0fc0040, /* XXX copied from RTL8139B, verify */
456 struct netdrv_private {
460 struct pci_dev *pci_dev;
461 struct net_device_stats stats;
462 struct timer_list timer; /* Media selection timer. */
463 unsigned char *rx_ring;
464 unsigned int cur_rx; /* Index into the Rx buffer of next Rx pkt. */
465 unsigned int tx_flag;
468 /* The saved address of a sent-in-place packet/buffer, for skfree(). */
469 struct ring_info tx_info[NUM_TX_DESC];
470 unsigned char *tx_buf[NUM_TX_DESC]; /* Tx bounce buffers */
471 unsigned char *tx_bufs; /* Tx bounce buffer region. */
472 dma_addr_t rx_ring_dma;
473 dma_addr_t tx_bufs_dma;
474 char phys[4]; /* MII device addresses. */
475 char twistie, twist_row, twist_col; /* Twister tune state. */
476 unsigned int full_duplex:1; /* Full-duplex operation requested. */
477 unsigned int duplex_lock:1;
478 unsigned int default_port:4; /* Last dev->if_port value. */
479 unsigned int media2:4; /* Secondary monitored media port. */
480 unsigned int medialock:1; /* Don't sense media type. */
481 unsigned int mediasense:1; /* Media sensing in progress. */
486 MODULE_AUTHOR ("Jeff Garzik <jgarzik@pobox.com>");
487 MODULE_DESCRIPTION ("Skeleton for a PCI Fast Ethernet driver");
488 MODULE_LICENSE("GPL");
489 module_param(multicast_filter_limit, int, 0);
490 module_param(max_interrupt_work, int, 0);
491 module_param_array(media, int, NULL, 0);
492 MODULE_PARM_DESC (multicast_filter_limit, "pci-skeleton maximum number of filtered multicast addresses");
493 MODULE_PARM_DESC (max_interrupt_work, "pci-skeleton maximum events handled per interrupt");
494 MODULE_PARM_DESC (media, "pci-skeleton: Bits 0-3: media type, bit 17: full duplex");
496 static int read_eeprom (void *ioaddr, int location, int addr_len);
497 static int netdrv_open (struct net_device *dev);
498 static int mdio_read (struct net_device *dev, int phy_id, int location);
499 static void mdio_write (struct net_device *dev, int phy_id, int location,
501 static void netdrv_timer (unsigned long data);
502 static void netdrv_tx_timeout (struct net_device *dev);
503 static void netdrv_init_ring (struct net_device *dev);
504 static int netdrv_start_xmit (struct sk_buff *skb,
505 struct net_device *dev);
506 static irqreturn_t netdrv_interrupt (int irq, void *dev_instance,
507 struct pt_regs *regs);
508 static int netdrv_close (struct net_device *dev);
509 static int netdrv_ioctl (struct net_device *dev, struct ifreq *rq, int cmd);
510 static struct net_device_stats *netdrv_get_stats (struct net_device *dev);
511 static void netdrv_set_rx_mode (struct net_device *dev);
512 static void netdrv_hw_start (struct net_device *dev);
517 #define NETDRV_R8(reg) inb (((unsigned long)ioaddr) + (reg))
518 #define NETDRV_R16(reg) inw (((unsigned long)ioaddr) + (reg))
519 #define NETDRV_R32(reg) ((unsigned long) inl (((unsigned long)ioaddr) + (reg)))
520 #define NETDRV_W8(reg, val8) outb ((val8), ((unsigned long)ioaddr) + (reg))
521 #define NETDRV_W16(reg, val16) outw ((val16), ((unsigned long)ioaddr) + (reg))
522 #define NETDRV_W32(reg, val32) outl ((val32), ((unsigned long)ioaddr) + (reg))
523 #define NETDRV_W8_F NETDRV_W8
524 #define NETDRV_W16_F NETDRV_W16
525 #define NETDRV_W32_F NETDRV_W32
532 #define readb(addr) inb((unsigned long)(addr))
533 #define readw(addr) inw((unsigned long)(addr))
534 #define readl(addr) inl((unsigned long)(addr))
535 #define writeb(val,addr) outb((val),(unsigned long)(addr))
536 #define writew(val,addr) outw((val),(unsigned long)(addr))
537 #define writel(val,addr) outl((val),(unsigned long)(addr))
541 /* write MMIO register, with flush */
542 /* Flush avoids rtl8139 bug w/ posted MMIO writes */
543 #define NETDRV_W8_F(reg, val8) do { writeb ((val8), ioaddr + (reg)); readb (ioaddr + (reg)); } while (0)
544 #define NETDRV_W16_F(reg, val16) do { writew ((val16), ioaddr + (reg)); readw (ioaddr + (reg)); } while (0)
545 #define NETDRV_W32_F(reg, val32) do { writel ((val32), ioaddr + (reg)); readl (ioaddr + (reg)); } while (0)
548 #if MMIO_FLUSH_AUDIT_COMPLETE
550 /* write MMIO register */
551 #define NETDRV_W8(reg, val8) writeb ((val8), ioaddr + (reg))
552 #define NETDRV_W16(reg, val16) writew ((val16), ioaddr + (reg))
553 #define NETDRV_W32(reg, val32) writel ((val32), ioaddr + (reg))
557 /* write MMIO register, then flush */
558 #define NETDRV_W8 NETDRV_W8_F
559 #define NETDRV_W16 NETDRV_W16_F
560 #define NETDRV_W32 NETDRV_W32_F
562 #endif /* MMIO_FLUSH_AUDIT_COMPLETE */
564 /* read MMIO register */
565 #define NETDRV_R8(reg) readb (ioaddr + (reg))
566 #define NETDRV_R16(reg) readw (ioaddr + (reg))
567 #define NETDRV_R32(reg) ((unsigned long) readl (ioaddr + (reg)))
569 #endif /* USE_IO_OPS */
572 static const u16 netdrv_intr_mask =
573 PCIErr | PCSTimeout | RxUnderrun | RxOverflow | RxFIFOOver |
574 TxErr | TxOK | RxErr | RxOK;
576 static const unsigned int netdrv_rx_config =
577 RxCfgEarlyRxNone | RxCfgRcv32K | RxNoWrap |
578 (RX_FIFO_THRESH << RxCfgFIFOShift) |
579 (RX_DMA_BURST << RxCfgDMAShift);
582 static int __devinit netdrv_init_board (struct pci_dev *pdev,
583 struct net_device **dev_out,
587 struct net_device *dev;
588 struct netdrv_private *tp;
590 u32 pio_start, pio_end, pio_flags, pio_len;
591 unsigned long mmio_start, mmio_end, mmio_flags, mmio_len;
596 assert (pdev != NULL);
597 assert (ioaddr_out != NULL);
602 /* dev zeroed in alloc_etherdev */
603 dev = alloc_etherdev (sizeof (*tp));
605 printk (KERN_ERR PFX "unable to alloc new ethernet\n");
606 DPRINTK ("EXIT, returning -ENOMEM\n");
609 SET_MODULE_OWNER(dev);
610 SET_NETDEV_DEV(dev, &pdev->dev);
613 /* enable device (incl. PCI PM wakeup), and bus-mastering */
614 rc = pci_enable_device (pdev);
618 pio_start = pci_resource_start (pdev, 0);
619 pio_end = pci_resource_end (pdev, 0);
620 pio_flags = pci_resource_flags (pdev, 0);
621 pio_len = pci_resource_len (pdev, 0);
623 mmio_start = pci_resource_start (pdev, 1);
624 mmio_end = pci_resource_end (pdev, 1);
625 mmio_flags = pci_resource_flags (pdev, 1);
626 mmio_len = pci_resource_len (pdev, 1);
628 /* set this immediately, we need to know before
629 * we talk to the chip directly */
630 DPRINTK("PIO region size == 0x%02X\n", pio_len);
631 DPRINTK("MMIO region size == 0x%02lX\n", mmio_len);
633 /* make sure PCI base addr 0 is PIO */
634 if (!(pio_flags & IORESOURCE_IO)) {
635 printk (KERN_ERR PFX "region #0 not a PIO resource, aborting\n");
640 /* make sure PCI base addr 1 is MMIO */
641 if (!(mmio_flags & IORESOURCE_MEM)) {
642 printk (KERN_ERR PFX "region #1 not an MMIO resource, aborting\n");
647 /* check for weird/broken PCI region reporting */
648 if ((pio_len < NETDRV_MIN_IO_SIZE) ||
649 (mmio_len < NETDRV_MIN_IO_SIZE)) {
650 printk (KERN_ERR PFX "Invalid PCI region size(s), aborting\n");
655 rc = pci_request_regions (pdev, "pci-skeleton");
659 pci_set_master (pdev);
662 ioaddr = (void *) pio_start;
664 /* ioremap MMIO region */
665 ioaddr = ioremap (mmio_start, mmio_len);
666 if (ioaddr == NULL) {
667 printk (KERN_ERR PFX "cannot remap MMIO, aborting\n");
669 goto err_out_free_res;
671 #endif /* USE_IO_OPS */
673 /* Soft reset the chip. */
674 NETDRV_W8 (ChipCmd, (NETDRV_R8 (ChipCmd) & ChipCmdClear) | CmdReset);
676 /* Check that the chip has finished the reset. */
677 for (i = 1000; i > 0; i--)
678 if ((NETDRV_R8 (ChipCmd) & CmdReset) == 0)
683 /* Bring the chip out of low-power mode. */
684 /* <insert device-specific code here> */
687 /* sanity checks -- ensure PIO and MMIO registers agree */
688 assert (inb (pio_start+Config0) == readb (ioaddr+Config0));
689 assert (inb (pio_start+Config1) == readb (ioaddr+Config1));
690 assert (inb (pio_start+TxConfig) == readb (ioaddr+TxConfig));
691 assert (inb (pio_start+RxConfig) == readb (ioaddr+RxConfig));
692 #endif /* !USE_IO_OPS */
694 /* identify chip attached to board */
695 tmp = NETDRV_R8 (ChipVersion);
696 for (i = ARRAY_SIZE (rtl_chip_info) - 1; i >= 0; i--)
697 if (tmp == rtl_chip_info[i].version) {
702 /* if unknown chip, assume array element #0, original RTL-8139 in this case */
703 printk (KERN_DEBUG PFX "PCI device %s: unknown chip version, assuming RTL-8139\n",
705 printk (KERN_DEBUG PFX "PCI device %s: TxConfig = 0x%lx\n", pci_name(pdev), NETDRV_R32 (TxConfig));
709 DPRINTK ("chipset id (%d) == index %d, '%s'\n",
712 rtl_chip_info[tp->chipset].name);
714 i = register_netdev (dev);
718 DPRINTK ("EXIT, returning 0\n");
719 *ioaddr_out = ioaddr;
728 pci_release_regions (pdev);
731 DPRINTK ("EXIT, returning %d\n", rc);
736 static int __devinit netdrv_init_one (struct pci_dev *pdev,
737 const struct pci_device_id *ent)
739 struct net_device *dev = NULL;
740 struct netdrv_private *tp;
741 int i, addr_len, option;
743 static int board_idx = -1;
745 /* when built into the kernel, we only print version if device is found */
747 static int printed_version;
748 if (!printed_version++)
754 assert (pdev != NULL);
755 assert (ent != NULL);
759 i = netdrv_init_board (pdev, &dev, &ioaddr);
761 DPRINTK ("EXIT, returning %d\n", i);
767 assert (ioaddr != NULL);
768 assert (dev != NULL);
771 addr_len = read_eeprom (ioaddr, 0, 8) == 0x8129 ? 8 : 6;
772 for (i = 0; i < 3; i++)
773 ((u16 *) (dev->dev_addr))[i] =
774 le16_to_cpu (read_eeprom (ioaddr, i + 7, addr_len));
776 /* The Rtl8139-specific entries in the device structure. */
777 dev->open = netdrv_open;
778 dev->hard_start_xmit = netdrv_start_xmit;
779 dev->stop = netdrv_close;
780 dev->get_stats = netdrv_get_stats;
781 dev->set_multicast_list = netdrv_set_rx_mode;
782 dev->do_ioctl = netdrv_ioctl;
783 dev->tx_timeout = netdrv_tx_timeout;
784 dev->watchdog_timeo = TX_TIMEOUT;
786 dev->irq = pdev->irq;
787 dev->base_addr = (unsigned long) ioaddr;
789 /* dev->priv/tp zeroed and aligned in alloc_etherdev */
792 /* note: tp->chipset set in netdrv_init_board */
793 tp->drv_flags = PCI_COMMAND_IO | PCI_COMMAND_MEMORY |
794 PCI_COMMAND_MASTER | NETDRV_CAPS;
796 tp->board = ent->driver_data;
797 tp->mmio_addr = ioaddr;
798 spin_lock_init(&tp->lock);
800 pci_set_drvdata(pdev, dev);
804 printk (KERN_INFO "%s: %s at 0x%lx, "
805 "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x, "
808 board_info[ent->driver_data].name,
810 dev->dev_addr[0], dev->dev_addr[1],
811 dev->dev_addr[2], dev->dev_addr[3],
812 dev->dev_addr[4], dev->dev_addr[5],
815 printk (KERN_DEBUG "%s: Identified 8139 chip type '%s'\n",
816 dev->name, rtl_chip_info[tp->chipset].name);
818 /* Put the chip into low-power mode. */
819 NETDRV_W8_F (Cfg9346, Cfg9346_Unlock);
821 /* The lower four bits are the media type. */
822 option = (board_idx > 7) ? 0 : media[board_idx];
824 tp->full_duplex = (option & 0x200) ? 1 : 0;
825 tp->default_port = option & 15;
826 if (tp->default_port)
830 if (tp->full_duplex) {
832 "%s: Media type forced to Full Duplex.\n",
834 mdio_write (dev, tp->phys[0], MII_ADVERTISE, ADVERTISE_FULL);
838 DPRINTK ("EXIT - returning 0\n");
843 static void __devexit netdrv_remove_one (struct pci_dev *pdev)
845 struct net_device *dev = pci_get_drvdata (pdev);
846 struct netdrv_private *np;
850 assert (dev != NULL);
855 unregister_netdev (dev);
858 iounmap (np->mmio_addr);
859 #endif /* !USE_IO_OPS */
861 pci_release_regions (pdev);
865 pci_set_drvdata (pdev, NULL);
867 pci_disable_device (pdev);
873 /* Serial EEPROM section. */
875 /* EEPROM_Ctrl bits. */
876 #define EE_SHIFT_CLK 0x04 /* EEPROM shift clock. */
877 #define EE_CS 0x08 /* EEPROM chip select. */
878 #define EE_DATA_WRITE 0x02 /* EEPROM chip data in. */
879 #define EE_WRITE_0 0x00
880 #define EE_WRITE_1 0x02
881 #define EE_DATA_READ 0x01 /* EEPROM chip data out. */
882 #define EE_ENB (0x80 | EE_CS)
884 /* Delay between EEPROM clock transitions.
885 No extra delay is needed with 33Mhz PCI, but 66Mhz may change this.
888 #define eeprom_delay() readl(ee_addr)
890 /* The EEPROM commands include the alway-set leading bit. */
891 #define EE_WRITE_CMD (5)
892 #define EE_READ_CMD (6)
893 #define EE_ERASE_CMD (7)
895 static int __devinit read_eeprom (void *ioaddr, int location, int addr_len)
899 void *ee_addr = ioaddr + Cfg9346;
900 int read_cmd = location | (EE_READ_CMD << addr_len);
904 writeb (EE_ENB & ~EE_CS, ee_addr);
905 writeb (EE_ENB, ee_addr);
908 /* Shift the read command bits out. */
909 for (i = 4 + addr_len; i >= 0; i--) {
910 int dataval = (read_cmd & (1 << i)) ? EE_DATA_WRITE : 0;
911 writeb (EE_ENB | dataval, ee_addr);
913 writeb (EE_ENB | dataval | EE_SHIFT_CLK, ee_addr);
916 writeb (EE_ENB, ee_addr);
919 for (i = 16; i > 0; i--) {
920 writeb (EE_ENB | EE_SHIFT_CLK, ee_addr);
923 (retval << 1) | ((readb (ee_addr) & EE_DATA_READ) ? 1 :
925 writeb (EE_ENB, ee_addr);
929 /* Terminate the EEPROM access. */
930 writeb (~EE_CS, ee_addr);
933 DPRINTK ("EXIT - returning %d\n", retval);
937 /* MII serial management: mostly bogus for now. */
938 /* Read and write the MII management registers using software-generated
939 serial MDIO protocol.
940 The maximum data clock rate is 2.5 Mhz. The minimum timing is usually
941 met by back-to-back PCI I/O cycles, but we insert a delay to avoid
942 "overclocking" issues. */
943 #define MDIO_DIR 0x80
944 #define MDIO_DATA_OUT 0x04
945 #define MDIO_DATA_IN 0x02
946 #define MDIO_CLK 0x01
947 #define MDIO_WRITE0 (MDIO_DIR)
948 #define MDIO_WRITE1 (MDIO_DIR | MDIO_DATA_OUT)
950 #define mdio_delay() readb(mdio_addr)
953 static char mii_2_8139_map[8] = {
965 /* Syncronize the MII management interface by shifting 32 one bits out. */
966 static void mdio_sync (void *mdio_addr)
972 for (i = 32; i >= 0; i--) {
973 writeb (MDIO_WRITE1, mdio_addr);
975 writeb (MDIO_WRITE1 | MDIO_CLK, mdio_addr);
983 static int mdio_read (struct net_device *dev, int phy_id, int location)
985 struct netdrv_private *tp = dev->priv;
986 void *mdio_addr = tp->mmio_addr + Config4;
987 int mii_cmd = (0xf6 << 10) | (phy_id << 5) | location;
993 if (phy_id > 31) { /* Really a 8139. Use internal registers. */
994 DPRINTK ("EXIT after directly using 8139 internal regs\n");
995 return location < 8 && mii_2_8139_map[location] ?
996 readw (tp->mmio_addr + mii_2_8139_map[location]) : 0;
998 mdio_sync (mdio_addr);
999 /* Shift the read command bits out. */
1000 for (i = 15; i >= 0; i--) {
1001 int dataval = (mii_cmd & (1 << i)) ? MDIO_DATA_OUT : 0;
1003 writeb (MDIO_DIR | dataval, mdio_addr);
1005 writeb (MDIO_DIR | dataval | MDIO_CLK, mdio_addr);
1009 /* Read the two transition, 16 data, and wire-idle bits. */
1010 for (i = 19; i > 0; i--) {
1011 writeb (0, mdio_addr);
1014 (retval << 1) | ((readb (mdio_addr) & MDIO_DATA_IN) ? 1
1016 writeb (MDIO_CLK, mdio_addr);
1020 DPRINTK ("EXIT, returning %d\n", (retval >> 1) & 0xffff);
1021 return (retval >> 1) & 0xffff;
1025 static void mdio_write (struct net_device *dev, int phy_id, int location,
1028 struct netdrv_private *tp = dev->priv;
1029 void *mdio_addr = tp->mmio_addr + Config4;
1031 (0x5002 << 16) | (phy_id << 23) | (location << 18) | value;
1034 DPRINTK ("ENTER\n");
1036 if (phy_id > 31) { /* Really a 8139. Use internal registers. */
1037 if (location < 8 && mii_2_8139_map[location]) {
1039 tp->mmio_addr + mii_2_8139_map[location]);
1040 readw (tp->mmio_addr + mii_2_8139_map[location]);
1042 DPRINTK ("EXIT after directly using 8139 internal regs\n");
1045 mdio_sync (mdio_addr);
1047 /* Shift the command bits out. */
1048 for (i = 31; i >= 0; i--) {
1050 (mii_cmd & (1 << i)) ? MDIO_WRITE1 : MDIO_WRITE0;
1051 writeb (dataval, mdio_addr);
1053 writeb (dataval | MDIO_CLK, mdio_addr);
1057 /* Clear out extra bits. */
1058 for (i = 2; i > 0; i--) {
1059 writeb (0, mdio_addr);
1061 writeb (MDIO_CLK, mdio_addr);
1069 static int netdrv_open (struct net_device *dev)
1071 struct netdrv_private *tp = dev->priv;
1074 void *ioaddr = tp->mmio_addr;
1077 DPRINTK ("ENTER\n");
1079 retval = request_irq (dev->irq, netdrv_interrupt, SA_SHIRQ, dev->name, dev);
1081 DPRINTK ("EXIT, returning %d\n", retval);
1085 tp->tx_bufs = pci_alloc_consistent(tp->pci_dev, TX_BUF_TOT_LEN,
1087 tp->rx_ring = pci_alloc_consistent(tp->pci_dev, RX_BUF_TOT_LEN,
1089 if (tp->tx_bufs == NULL || tp->rx_ring == NULL) {
1090 free_irq(dev->irq, dev);
1093 pci_free_consistent(tp->pci_dev, TX_BUF_TOT_LEN,
1094 tp->tx_bufs, tp->tx_bufs_dma);
1096 pci_free_consistent(tp->pci_dev, RX_BUF_TOT_LEN,
1097 tp->rx_ring, tp->rx_ring_dma);
1099 DPRINTK ("EXIT, returning -ENOMEM\n");
1104 tp->full_duplex = tp->duplex_lock;
1105 tp->tx_flag = (TX_FIFO_THRESH << 11) & 0x003f0000;
1107 netdrv_init_ring (dev);
1108 netdrv_hw_start (dev);
1110 DPRINTK ("%s: netdrv_open() ioaddr %#lx IRQ %d"
1111 " GP Pins %2.2x %s-duplex.\n",
1112 dev->name, pci_resource_start (tp->pci_dev, 1),
1113 dev->irq, NETDRV_R8 (MediaStatus),
1114 tp->full_duplex ? "full" : "half");
1116 /* Set the timer to switch to check for link beat and perhaps switch
1117 to an alternate media type. */
1118 init_timer (&tp->timer);
1119 tp->timer.expires = jiffies + 3 * HZ;
1120 tp->timer.data = (unsigned long) dev;
1121 tp->timer.function = &netdrv_timer;
1122 add_timer (&tp->timer);
1124 DPRINTK ("EXIT, returning 0\n");
1129 /* Start the hardware at open or resume. */
1130 static void netdrv_hw_start (struct net_device *dev)
1132 struct netdrv_private *tp = dev->priv;
1133 void *ioaddr = tp->mmio_addr;
1136 DPRINTK ("ENTER\n");
1138 /* Soft reset the chip. */
1139 NETDRV_W8 (ChipCmd, (NETDRV_R8 (ChipCmd) & ChipCmdClear) | CmdReset);
1142 /* Check that the chip has finished the reset. */
1143 for (i = 1000; i > 0; i--)
1144 if ((NETDRV_R8 (ChipCmd) & CmdReset) == 0)
1147 /* Restore our idea of the MAC address. */
1148 NETDRV_W32_F (MAC0 + 0, cpu_to_le32 (*(u32 *) (dev->dev_addr + 0)));
1149 NETDRV_W32_F (MAC0 + 4, cpu_to_le32 (*(u32 *) (dev->dev_addr + 4)));
1151 /* Must enable Tx/Rx before setting transfer thresholds! */
1152 NETDRV_W8_F (ChipCmd, (NETDRV_R8 (ChipCmd) & ChipCmdClear) |
1153 CmdRxEnb | CmdTxEnb);
1155 i = netdrv_rx_config |
1156 (NETDRV_R32 (RxConfig) & rtl_chip_info[tp->chipset].RxConfigMask);
1157 NETDRV_W32_F (RxConfig, i);
1159 /* Check this value: the documentation for IFG contradicts ifself. */
1160 NETDRV_W32 (TxConfig, (TX_DMA_BURST << TxDMAShift));
1162 /* unlock Config[01234] and BMCR register writes */
1163 NETDRV_W8_F (Cfg9346, Cfg9346_Unlock);
1168 /* Lock Config[01234] and BMCR register writes */
1169 NETDRV_W8_F (Cfg9346, Cfg9346_Lock);
1172 /* init Rx ring buffer DMA address */
1173 NETDRV_W32_F (RxBuf, tp->rx_ring_dma);
1175 /* init Tx buffer DMA addresses */
1176 for (i = 0; i < NUM_TX_DESC; i++)
1177 NETDRV_W32_F (TxAddr0 + (i * 4), tp->tx_bufs_dma + (tp->tx_buf[i] - tp->tx_bufs));
1179 NETDRV_W32_F (RxMissed, 0);
1181 netdrv_set_rx_mode (dev);
1183 /* no early-rx interrupts */
1184 NETDRV_W16 (MultiIntr, NETDRV_R16 (MultiIntr) & MultiIntrClear);
1186 /* make sure RxTx has started */
1187 NETDRV_W8_F (ChipCmd, (NETDRV_R8 (ChipCmd) & ChipCmdClear) |
1188 CmdRxEnb | CmdTxEnb);
1190 /* Enable all known interrupts by setting the interrupt mask. */
1191 NETDRV_W16_F (IntrMask, netdrv_intr_mask);
1193 netif_start_queue (dev);
1199 /* Initialize the Rx and Tx rings, along with various 'dev' bits. */
1200 static void netdrv_init_ring (struct net_device *dev)
1202 struct netdrv_private *tp = dev->priv;
1205 DPRINTK ("ENTER\n");
1208 atomic_set (&tp->cur_tx, 0);
1209 atomic_set (&tp->dirty_tx, 0);
1211 for (i = 0; i < NUM_TX_DESC; i++) {
1212 tp->tx_info[i].skb = NULL;
1213 tp->tx_info[i].mapping = 0;
1214 tp->tx_buf[i] = &tp->tx_bufs[i * TX_BUF_SIZE];
1221 static void netdrv_timer (unsigned long data)
1223 struct net_device *dev = (struct net_device *) data;
1224 struct netdrv_private *tp = dev->priv;
1225 void *ioaddr = tp->mmio_addr;
1226 int next_tick = 60 * HZ;
1229 mii_lpa = mdio_read (dev, tp->phys[0], MII_LPA);
1231 if (!tp->duplex_lock && mii_lpa != 0xffff) {
1232 int duplex = (mii_lpa & LPA_100FULL)
1233 || (mii_lpa & 0x01C0) == 0x0040;
1234 if (tp->full_duplex != duplex) {
1235 tp->full_duplex = duplex;
1237 "%s: Setting %s-duplex based on MII #%d link"
1238 " partner ability of %4.4x.\n", dev->name,
1239 tp->full_duplex ? "full" : "half",
1240 tp->phys[0], mii_lpa);
1241 NETDRV_W8 (Cfg9346, Cfg9346_Unlock);
1242 NETDRV_W8 (Config1, tp->full_duplex ? 0x60 : 0x20);
1243 NETDRV_W8 (Cfg9346, Cfg9346_Lock);
1247 DPRINTK ("%s: Media selection tick, Link partner %4.4x.\n",
1248 dev->name, NETDRV_R16 (NWayLPAR));
1249 DPRINTK ("%s: Other registers are IntMask %4.4x IntStatus %4.4x"
1250 " RxStatus %4.4x.\n", dev->name,
1251 NETDRV_R16 (IntrMask),
1252 NETDRV_R16 (IntrStatus),
1253 NETDRV_R32 (RxEarlyStatus));
1254 DPRINTK ("%s: Chip config %2.2x %2.2x.\n",
1255 dev->name, NETDRV_R8 (Config0),
1256 NETDRV_R8 (Config1));
1258 tp->timer.expires = jiffies + next_tick;
1259 add_timer (&tp->timer);
1263 static void netdrv_tx_clear (struct netdrv_private *tp)
1267 atomic_set (&tp->cur_tx, 0);
1268 atomic_set (&tp->dirty_tx, 0);
1270 /* Dump the unsent Tx packets. */
1271 for (i = 0; i < NUM_TX_DESC; i++) {
1272 struct ring_info *rp = &tp->tx_info[i];
1273 if (rp->mapping != 0) {
1274 pci_unmap_single (tp->pci_dev, rp->mapping,
1275 rp->skb->len, PCI_DMA_TODEVICE);
1279 dev_kfree_skb (rp->skb);
1281 tp->stats.tx_dropped++;
1287 static void netdrv_tx_timeout (struct net_device *dev)
1289 struct netdrv_private *tp = dev->priv;
1290 void *ioaddr = tp->mmio_addr;
1293 unsigned long flags;
1295 DPRINTK ("%s: Transmit timeout, status %2.2x %4.4x "
1296 "media %2.2x.\n", dev->name,
1297 NETDRV_R8 (ChipCmd),
1298 NETDRV_R16 (IntrStatus),
1299 NETDRV_R8 (MediaStatus));
1301 /* disable Tx ASAP, if not already */
1302 tmp8 = NETDRV_R8 (ChipCmd);
1303 if (tmp8 & CmdTxEnb)
1304 NETDRV_W8 (ChipCmd, tmp8 & ~CmdTxEnb);
1306 /* Disable interrupts by clearing the interrupt mask. */
1307 NETDRV_W16 (IntrMask, 0x0000);
1309 /* Emit info to figure out what went wrong. */
1310 printk (KERN_DEBUG "%s: Tx queue start entry %d dirty entry %d.\n",
1311 dev->name, atomic_read (&tp->cur_tx),
1312 atomic_read (&tp->dirty_tx));
1313 for (i = 0; i < NUM_TX_DESC; i++)
1314 printk (KERN_DEBUG "%s: Tx descriptor %d is %8.8lx.%s\n",
1315 dev->name, i, NETDRV_R32 (TxStatus0 + (i * 4)),
1316 i == atomic_read (&tp->dirty_tx) % NUM_TX_DESC ?
1317 " (queue head)" : "");
1319 /* Stop a shared interrupt from scavenging while we are. */
1320 spin_lock_irqsave (&tp->lock, flags);
1322 netdrv_tx_clear (tp);
1324 spin_unlock_irqrestore (&tp->lock, flags);
1326 /* ...and finally, reset everything */
1327 netdrv_hw_start (dev);
1329 netif_wake_queue (dev);
1334 static int netdrv_start_xmit (struct sk_buff *skb, struct net_device *dev)
1336 struct netdrv_private *tp = dev->priv;
1337 void *ioaddr = tp->mmio_addr;
1340 /* Calculate the next Tx descriptor entry. */
1341 entry = atomic_read (&tp->cur_tx) % NUM_TX_DESC;
1343 assert (tp->tx_info[entry].skb == NULL);
1344 assert (tp->tx_info[entry].mapping == 0);
1346 tp->tx_info[entry].skb = skb;
1347 /* tp->tx_info[entry].mapping = 0; */
1348 memcpy (tp->tx_buf[entry], skb->data, skb->len);
1350 /* Note: the chip doesn't have auto-pad! */
1351 NETDRV_W32 (TxStatus0 + (entry * sizeof(u32)),
1352 tp->tx_flag | (skb->len >= ETH_ZLEN ? skb->len : ETH_ZLEN));
1354 dev->trans_start = jiffies;
1355 atomic_inc (&tp->cur_tx);
1356 if ((atomic_read (&tp->cur_tx) - atomic_read (&tp->dirty_tx)) >= NUM_TX_DESC)
1357 netif_stop_queue (dev);
1359 DPRINTK ("%s: Queued Tx packet at %p size %u to slot %d.\n",
1360 dev->name, skb->data, skb->len, entry);
1366 static void netdrv_tx_interrupt (struct net_device *dev,
1367 struct netdrv_private *tp,
1370 int cur_tx, dirty_tx, tx_left;
1372 assert (dev != NULL);
1373 assert (tp != NULL);
1374 assert (ioaddr != NULL);
1376 dirty_tx = atomic_read (&tp->dirty_tx);
1378 cur_tx = atomic_read (&tp->cur_tx);
1379 tx_left = cur_tx - dirty_tx;
1380 while (tx_left > 0) {
1381 int entry = dirty_tx % NUM_TX_DESC;
1384 txstatus = NETDRV_R32 (TxStatus0 + (entry * sizeof (u32)));
1386 if (!(txstatus & (TxStatOK | TxUnderrun | TxAborted)))
1387 break; /* It still hasn't been Txed */
1389 /* Note: TxCarrierLost is always asserted at 100mbps. */
1390 if (txstatus & (TxOutOfWindow | TxAborted)) {
1391 /* There was an major error, log it. */
1392 DPRINTK ("%s: Transmit error, Tx status %8.8x.\n",
1393 dev->name, txstatus);
1394 tp->stats.tx_errors++;
1395 if (txstatus & TxAborted) {
1396 tp->stats.tx_aborted_errors++;
1397 NETDRV_W32 (TxConfig, TxClearAbt | (TX_DMA_BURST << TxDMAShift));
1399 if (txstatus & TxCarrierLost)
1400 tp->stats.tx_carrier_errors++;
1401 if (txstatus & TxOutOfWindow)
1402 tp->stats.tx_window_errors++;
1404 if (txstatus & TxUnderrun) {
1405 /* Add 64 to the Tx FIFO threshold. */
1406 if (tp->tx_flag < 0x00300000)
1407 tp->tx_flag += 0x00020000;
1408 tp->stats.tx_fifo_errors++;
1410 tp->stats.collisions += (txstatus >> 24) & 15;
1411 tp->stats.tx_bytes += txstatus & 0x7ff;
1412 tp->stats.tx_packets++;
1415 /* Free the original skb. */
1416 if (tp->tx_info[entry].mapping != 0) {
1417 pci_unmap_single(tp->pci_dev,
1418 tp->tx_info[entry].mapping,
1419 tp->tx_info[entry].skb->len,
1421 tp->tx_info[entry].mapping = 0;
1423 dev_kfree_skb_irq (tp->tx_info[entry].skb);
1424 tp->tx_info[entry].skb = NULL;
1426 if (dirty_tx < 0) { /* handle signed int overflow */
1427 atomic_sub (cur_tx, &tp->cur_tx); /* XXX racy? */
1428 dirty_tx = cur_tx - tx_left + 1;
1430 if (netif_queue_stopped (dev))
1431 netif_wake_queue (dev);
1433 cur_tx = atomic_read (&tp->cur_tx);
1434 tx_left = cur_tx - dirty_tx;
1438 #ifndef NETDRV_NDEBUG
1439 if (atomic_read (&tp->cur_tx) - dirty_tx > NUM_TX_DESC) {
1441 "%s: Out-of-sync dirty pointer, %d vs. %d.\n",
1442 dev->name, dirty_tx, atomic_read (&tp->cur_tx));
1443 dirty_tx += NUM_TX_DESC;
1445 #endif /* NETDRV_NDEBUG */
1447 atomic_set (&tp->dirty_tx, dirty_tx);
1451 /* TODO: clean this up! Rx reset need not be this intensive */
1452 static void netdrv_rx_err (u32 rx_status, struct net_device *dev,
1453 struct netdrv_private *tp, void *ioaddr)
1456 int tmp_work = 1000;
1458 DPRINTK ("%s: Ethernet frame had errors, status %8.8x.\n",
1459 dev->name, rx_status);
1460 if (rx_status & RxTooLong) {
1461 DPRINTK ("%s: Oversized Ethernet frame, status %4.4x!\n",
1462 dev->name, rx_status);
1463 /* A.C.: The chip hangs here. */
1465 tp->stats.rx_errors++;
1466 if (rx_status & (RxBadSymbol | RxBadAlign))
1467 tp->stats.rx_frame_errors++;
1468 if (rx_status & (RxRunt | RxTooLong))
1469 tp->stats.rx_length_errors++;
1470 if (rx_status & RxCRCErr)
1471 tp->stats.rx_crc_errors++;
1472 /* Reset the receiver, based on RealTek recommendation. (Bug?) */
1475 /* disable receive */
1476 tmp8 = NETDRV_R8 (ChipCmd) & ChipCmdClear;
1477 NETDRV_W8_F (ChipCmd, tmp8 | CmdTxEnb);
1479 /* A.C.: Reset the multicast list. */
1480 netdrv_set_rx_mode (dev);
1482 /* XXX potentially temporary hack to
1483 * restart hung receiver */
1484 while (--tmp_work > 0) {
1485 tmp8 = NETDRV_R8 (ChipCmd);
1486 if ((tmp8 & CmdRxEnb) && (tmp8 & CmdTxEnb))
1488 NETDRV_W8_F (ChipCmd,
1489 (tmp8 & ChipCmdClear) | CmdRxEnb | CmdTxEnb);
1492 /* G.S.: Re-enable receiver */
1493 /* XXX temporary hack to work around receiver hang */
1494 netdrv_set_rx_mode (dev);
1497 printk (KERN_WARNING PFX "tx/rx enable wait too long\n");
1501 /* The data sheet doesn't describe the Rx ring at all, so I'm guessing at the
1502 field alignments and semantics. */
1503 static void netdrv_rx_interrupt (struct net_device *dev,
1504 struct netdrv_private *tp, void *ioaddr)
1506 unsigned char *rx_ring;
1509 assert (dev != NULL);
1510 assert (tp != NULL);
1511 assert (ioaddr != NULL);
1513 rx_ring = tp->rx_ring;
1514 cur_rx = tp->cur_rx;
1516 DPRINTK ("%s: In netdrv_rx(), current %4.4x BufAddr %4.4x,"
1517 " free to %4.4x, Cmd %2.2x.\n", dev->name, cur_rx,
1518 NETDRV_R16 (RxBufAddr),
1519 NETDRV_R16 (RxBufPtr), NETDRV_R8 (ChipCmd));
1521 while ((NETDRV_R8 (ChipCmd) & RxBufEmpty) == 0) {
1522 int ring_offset = cur_rx % RX_BUF_LEN;
1524 unsigned int rx_size;
1525 unsigned int pkt_size;
1526 struct sk_buff *skb;
1528 /* read size+status of next frame from DMA ring buffer */
1529 rx_status = le32_to_cpu (*(u32 *) (rx_ring + ring_offset));
1530 rx_size = rx_status >> 16;
1531 pkt_size = rx_size - 4;
1533 DPRINTK ("%s: netdrv_rx() status %4.4x, size %4.4x,"
1534 " cur %4.4x.\n", dev->name, rx_status,
1536 #if NETDRV_DEBUG > 2
1539 DPRINTK ("%s: Frame contents ", dev->name);
1540 for (i = 0; i < 70; i++)
1542 rx_ring[ring_offset + i]);
1547 /* If Rx err or invalid rx_size/rx_status received
1548 * (which happens if we get lost in the ring),
1549 * Rx process gets reset, so we abort any further
1552 if ((rx_size > (MAX_ETH_FRAME_SIZE+4)) ||
1553 (!(rx_status & RxStatusOK))) {
1554 netdrv_rx_err (rx_status, dev, tp, ioaddr);
1558 /* Malloc up new buffer, compatible with net-2e. */
1559 /* Omit the four octet CRC from the length. */
1561 /* TODO: consider allocating skb's outside of
1562 * interrupt context, both to speed interrupt processing,
1563 * and also to reduce the chances of having to
1564 * drop packets here under memory pressure.
1567 skb = dev_alloc_skb (pkt_size + 2);
1570 skb_reserve (skb, 2); /* 16 byte align the IP fields. */
1572 eth_copy_and_sum (skb, &rx_ring[ring_offset + 4], pkt_size, 0);
1573 skb_put (skb, pkt_size);
1575 skb->protocol = eth_type_trans (skb, dev);
1577 dev->last_rx = jiffies;
1578 tp->stats.rx_bytes += pkt_size;
1579 tp->stats.rx_packets++;
1581 printk (KERN_WARNING
1582 "%s: Memory squeeze, dropping packet.\n",
1584 tp->stats.rx_dropped++;
1587 cur_rx = (cur_rx + rx_size + 4 + 3) & ~3;
1588 NETDRV_W16_F (RxBufPtr, cur_rx - 16);
1591 DPRINTK ("%s: Done netdrv_rx(), current %4.4x BufAddr %4.4x,"
1592 " free to %4.4x, Cmd %2.2x.\n", dev->name, cur_rx,
1593 NETDRV_R16 (RxBufAddr),
1594 NETDRV_R16 (RxBufPtr), NETDRV_R8 (ChipCmd));
1596 tp->cur_rx = cur_rx;
1600 static void netdrv_weird_interrupt (struct net_device *dev,
1601 struct netdrv_private *tp,
1603 int status, int link_changed)
1605 printk (KERN_DEBUG "%s: Abnormal interrupt, status %8.8x.\n",
1608 assert (dev != NULL);
1609 assert (tp != NULL);
1610 assert (ioaddr != NULL);
1612 /* Update the error count. */
1613 tp->stats.rx_missed_errors += NETDRV_R32 (RxMissed);
1614 NETDRV_W32 (RxMissed, 0);
1616 if ((status & RxUnderrun) && link_changed &&
1617 (tp->drv_flags & HAS_LNK_CHNG)) {
1618 /* Really link-change on new chips. */
1619 int lpar = NETDRV_R16 (NWayLPAR);
1620 int duplex = (lpar & 0x0100) || (lpar & 0x01C0) == 0x0040
1622 if (tp->full_duplex != duplex) {
1623 tp->full_duplex = duplex;
1624 NETDRV_W8 (Cfg9346, Cfg9346_Unlock);
1625 NETDRV_W8 (Config1, tp->full_duplex ? 0x60 : 0x20);
1626 NETDRV_W8 (Cfg9346, Cfg9346_Lock);
1628 status &= ~RxUnderrun;
1631 /* XXX along with netdrv_rx_err, are we double-counting errors? */
1633 (RxUnderrun | RxOverflow | RxErr | RxFIFOOver))
1634 tp->stats.rx_errors++;
1636 if (status & (PCSTimeout))
1637 tp->stats.rx_length_errors++;
1638 if (status & (RxUnderrun | RxFIFOOver))
1639 tp->stats.rx_fifo_errors++;
1640 if (status & RxOverflow) {
1641 tp->stats.rx_over_errors++;
1642 tp->cur_rx = NETDRV_R16 (RxBufAddr) % RX_BUF_LEN;
1643 NETDRV_W16_F (RxBufPtr, tp->cur_rx - 16);
1645 if (status & PCIErr) {
1647 pci_read_config_word (tp->pci_dev, PCI_STATUS, &pci_cmd_status);
1649 printk (KERN_ERR "%s: PCI Bus error %4.4x.\n",
1650 dev->name, pci_cmd_status);
1655 /* The interrupt handler does all of the Rx thread work and cleans up
1656 after the Tx thread. */
1657 static irqreturn_t netdrv_interrupt (int irq, void *dev_instance,
1658 struct pt_regs *regs)
1660 struct net_device *dev = (struct net_device *) dev_instance;
1661 struct netdrv_private *tp = dev->priv;
1662 int boguscnt = max_interrupt_work;
1663 void *ioaddr = tp->mmio_addr;
1664 int status = 0, link_changed = 0; /* avoid bogus "uninit" warning */
1667 spin_lock (&tp->lock);
1670 status = NETDRV_R16 (IntrStatus);
1672 /* h/w no longer present (hotplug?) or major error, bail */
1673 if (status == 0xFFFF)
1677 /* Acknowledge all of the current interrupt sources ASAP */
1678 NETDRV_W16_F (IntrStatus, status);
1680 DPRINTK ("%s: interrupt status=%#4.4x new intstat=%#4.4x.\n",
1682 NETDRV_R16 (IntrStatus));
1685 (PCIErr | PCSTimeout | RxUnderrun | RxOverflow |
1686 RxFIFOOver | TxErr | TxOK | RxErr | RxOK)) == 0)
1689 /* Check uncommon events with one test. */
1690 if (status & (PCIErr | PCSTimeout | RxUnderrun | RxOverflow |
1691 RxFIFOOver | TxErr | RxErr))
1692 netdrv_weird_interrupt (dev, tp, ioaddr,
1693 status, link_changed);
1695 if (status & (RxOK | RxUnderrun | RxOverflow | RxFIFOOver)) /* Rx interrupt */
1696 netdrv_rx_interrupt (dev, tp, ioaddr);
1698 if (status & (TxOK | TxErr))
1699 netdrv_tx_interrupt (dev, tp, ioaddr);
1702 } while (boguscnt > 0);
1704 if (boguscnt <= 0) {
1705 printk (KERN_WARNING
1706 "%s: Too much work at interrupt, "
1707 "IntrStatus=0x%4.4x.\n", dev->name,
1710 /* Clear all interrupt sources. */
1711 NETDRV_W16 (IntrStatus, 0xffff);
1714 spin_unlock (&tp->lock);
1716 DPRINTK ("%s: exiting interrupt, intr_status=%#4.4x.\n",
1717 dev->name, NETDRV_R16 (IntrStatus));
1718 return IRQ_RETVAL(handled);
1722 static int netdrv_close (struct net_device *dev)
1724 struct netdrv_private *tp = dev->priv;
1725 void *ioaddr = tp->mmio_addr;
1726 unsigned long flags;
1728 DPRINTK ("ENTER\n");
1730 netif_stop_queue (dev);
1732 DPRINTK ("%s: Shutting down ethercard, status was 0x%4.4x.\n",
1733 dev->name, NETDRV_R16 (IntrStatus));
1735 del_timer_sync (&tp->timer);
1737 spin_lock_irqsave (&tp->lock, flags);
1739 /* Stop the chip's Tx and Rx DMA processes. */
1740 NETDRV_W8 (ChipCmd, (NETDRV_R8 (ChipCmd) & ChipCmdClear));
1742 /* Disable interrupts by clearing the interrupt mask. */
1743 NETDRV_W16 (IntrMask, 0x0000);
1745 /* Update the error counts. */
1746 tp->stats.rx_missed_errors += NETDRV_R32 (RxMissed);
1747 NETDRV_W32 (RxMissed, 0);
1749 spin_unlock_irqrestore (&tp->lock, flags);
1752 free_irq (dev->irq, dev);
1754 netdrv_tx_clear (tp);
1756 pci_free_consistent(tp->pci_dev, RX_BUF_TOT_LEN,
1757 tp->rx_ring, tp->rx_ring_dma);
1758 pci_free_consistent(tp->pci_dev, TX_BUF_TOT_LEN,
1759 tp->tx_bufs, tp->tx_bufs_dma);
1763 /* Green! Put the chip in low-power mode. */
1764 NETDRV_W8 (Cfg9346, Cfg9346_Unlock);
1765 NETDRV_W8 (Config1, 0x03);
1766 NETDRV_W8 (Cfg9346, Cfg9346_Lock);
1773 static int netdrv_ioctl (struct net_device *dev, struct ifreq *rq, int cmd)
1775 struct netdrv_private *tp = dev->priv;
1776 struct mii_ioctl_data *data = if_mii(rq);
1777 unsigned long flags;
1780 DPRINTK ("ENTER\n");
1783 case SIOCGMIIPHY: /* Get address of MII PHY in use. */
1784 data->phy_id = tp->phys[0] & 0x3f;
1787 case SIOCGMIIREG: /* Read MII PHY register. */
1788 spin_lock_irqsave (&tp->lock, flags);
1789 data->val_out = mdio_read (dev, data->phy_id & 0x1f, data->reg_num & 0x1f);
1790 spin_unlock_irqrestore (&tp->lock, flags);
1793 case SIOCSMIIREG: /* Write MII PHY register. */
1794 if (!capable (CAP_NET_ADMIN)) {
1799 spin_lock_irqsave (&tp->lock, flags);
1800 mdio_write (dev, data->phy_id & 0x1f, data->reg_num & 0x1f, data->val_in);
1801 spin_unlock_irqrestore (&tp->lock, flags);
1809 DPRINTK ("EXIT, returning %d\n", rc);
1814 static struct net_device_stats *netdrv_get_stats (struct net_device *dev)
1816 struct netdrv_private *tp = dev->priv;
1817 void *ioaddr = tp->mmio_addr;
1819 DPRINTK ("ENTER\n");
1821 assert (tp != NULL);
1823 if (netif_running(dev)) {
1824 unsigned long flags;
1826 spin_lock_irqsave (&tp->lock, flags);
1828 tp->stats.rx_missed_errors += NETDRV_R32 (RxMissed);
1829 NETDRV_W32 (RxMissed, 0);
1831 spin_unlock_irqrestore (&tp->lock, flags);
1838 /* Set or clear the multicast filter for this adaptor.
1839 This routine is not state sensitive and need not be SMP locked. */
1841 static void netdrv_set_rx_mode (struct net_device *dev)
1843 struct netdrv_private *tp = dev->priv;
1844 void *ioaddr = tp->mmio_addr;
1845 u32 mc_filter[2]; /* Multicast hash filter */
1849 DPRINTK ("ENTER\n");
1851 DPRINTK ("%s: netdrv_set_rx_mode(%4.4x) done -- Rx config %8.8x.\n",
1852 dev->name, dev->flags, NETDRV_R32 (RxConfig));
1854 /* Note: do not reorder, GCC is clever about common statements. */
1855 if (dev->flags & IFF_PROMISC) {
1856 /* Unconditionally log net taps. */
1857 printk (KERN_NOTICE "%s: Promiscuous mode enabled.\n",
1860 AcceptBroadcast | AcceptMulticast | AcceptMyPhys |
1862 mc_filter[1] = mc_filter[0] = 0xffffffff;
1863 } else if ((dev->mc_count > multicast_filter_limit)
1864 || (dev->flags & IFF_ALLMULTI)) {
1865 /* Too many to filter perfectly -- accept all multicasts. */
1866 rx_mode = AcceptBroadcast | AcceptMulticast | AcceptMyPhys;
1867 mc_filter[1] = mc_filter[0] = 0xffffffff;
1869 struct dev_mc_list *mclist;
1870 rx_mode = AcceptBroadcast | AcceptMulticast | AcceptMyPhys;
1871 mc_filter[1] = mc_filter[0] = 0;
1872 for (i = 0, mclist = dev->mc_list; mclist && i < dev->mc_count;
1873 i++, mclist = mclist->next) {
1874 int bit_nr = ether_crc(ETH_ALEN, mclist->dmi_addr) >> 26;
1876 mc_filter[bit_nr >> 5] |= 1 << (bit_nr & 31);
1880 /* if called from irq handler, lock already acquired */
1882 spin_lock_irq (&tp->lock);
1884 /* We can safely update without stopping the chip. */
1885 tmp = netdrv_rx_config | rx_mode |
1886 (NETDRV_R32 (RxConfig) & rtl_chip_info[tp->chipset].RxConfigMask);
1887 NETDRV_W32_F (RxConfig, tmp);
1888 NETDRV_W32_F (MAR0 + 0, mc_filter[0]);
1889 NETDRV_W32_F (MAR0 + 4, mc_filter[1]);
1892 spin_unlock_irq (&tp->lock);
1900 static int netdrv_suspend (struct pci_dev *pdev, pm_message_t state)
1902 struct net_device *dev = pci_get_drvdata (pdev);
1903 struct netdrv_private *tp = dev->priv;
1904 void *ioaddr = tp->mmio_addr;
1905 unsigned long flags;
1907 if (!netif_running(dev))
1909 netif_device_detach (dev);
1911 spin_lock_irqsave (&tp->lock, flags);
1913 /* Disable interrupts, stop Tx and Rx. */
1914 NETDRV_W16 (IntrMask, 0x0000);
1915 NETDRV_W8 (ChipCmd, (NETDRV_R8 (ChipCmd) & ChipCmdClear));
1917 /* Update the error counts. */
1918 tp->stats.rx_missed_errors += NETDRV_R32 (RxMissed);
1919 NETDRV_W32 (RxMissed, 0);
1921 spin_unlock_irqrestore (&tp->lock, flags);
1923 pci_save_state (pdev);
1924 pci_set_power_state (pdev, PCI_D3hot);
1930 static int netdrv_resume (struct pci_dev *pdev)
1932 struct net_device *dev = pci_get_drvdata (pdev);
1933 struct netdrv_private *tp = dev->priv;
1935 if (!netif_running(dev))
1937 pci_set_power_state (pdev, PCI_D0);
1938 pci_restore_state (pdev);
1939 netif_device_attach (dev);
1940 netdrv_hw_start (dev);
1945 #endif /* CONFIG_PM */
1948 static struct pci_driver netdrv_pci_driver = {
1950 .id_table = netdrv_pci_tbl,
1951 .probe = netdrv_init_one,
1952 .remove = __devexit_p(netdrv_remove_one),
1954 .suspend = netdrv_suspend,
1955 .resume = netdrv_resume,
1956 #endif /* CONFIG_PM */
1960 static int __init netdrv_init_module (void)
1962 /* when a module, this is printed whether or not devices are found in probe */
1966 return pci_module_init (&netdrv_pci_driver);
1970 static void __exit netdrv_cleanup_module (void)
1972 pci_unregister_driver (&netdrv_pci_driver);
1976 module_init(netdrv_init_module);
1977 module_exit(netdrv_cleanup_module);