2 * rtl8169.c : U-Boot driver for the RealTek RTL8169
4 * Masami Komiya (mkomiya@sonare.it)
6 * Most part is taken from r8169.c of etherboot
10 /**************************************************************************
11 * r8169.c: Etherboot device driver for the RealTek RTL-8169 Gigabit
12 * Written 2003 by Timothy Legge <tlegge@rogers.com>
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
28 * Portions of this code based on:
29 * r8169.c: A RealTek RTL-8169 Gigabit Ethernet driver
30 * for Linux kernel 2.4.x.
32 * Written 2002 ShuChen <shuchen@realtek.com.tw>
33 * See Linux Driver for full information
35 * Linux Driver Version 1.27a, 10.02.2002
38 * Jean Chen of RealTek Semiconductor Corp. for
39 * providing the evaluation NIC used to develop
40 * this driver. RealTek's support for Etherboot
46 * v1.0 11-26-2003 timlegge Initial port of Linux driver
47 * v1.5 01-17-2004 timlegge Initial driver output cleanup
49 * Indent Options: indent -kr -i8
50 ***************************************************************************/
52 * 26 August 2006 Mihai Georgian <u-boot@linuxnotincluded.org.uk>
53 * Modified to use le32_to_cpu and cpu_to_le32 properly
61 #if defined(CONFIG_CMD_NET) && defined(CONFIG_NET_MULTI) && \
62 defined(CONFIG_RTL8169)
65 #undef DEBUG_RTL8169_TX
66 #undef DEBUG_RTL8169_RX
68 #define drv_version "v1.5"
69 #define drv_date "01-17-2004"
73 /* Condensed operations for readability. */
74 #define currticks() get_timer(0)
78 static int media[MAX_UNITS] = { -1, -1, -1, -1, -1, -1, -1, -1 };
80 /* MAC address length*/
81 #define MAC_ADDR_LEN 6
83 /* max supported gigabit ethernet frame size -- must be at least (dev->mtu+14+4).*/
84 #define MAX_ETH_FRAME_SIZE 1536
86 #define TX_FIFO_THRESH 256 /* In bytes */
88 #define RX_FIFO_THRESH 7 /* 7 means NO threshold, Rx buffer level before first PCI xfer. */
89 #define RX_DMA_BURST 6 /* Maximum PCI burst, '6' is 1024 */
90 #define TX_DMA_BURST 6 /* Maximum PCI burst, '6' is 1024 */
91 #define EarlyTxThld 0x3F /* 0x3F means NO early transmit */
92 #define RxPacketMaxSize 0x0800 /* Maximum size supported is 16K-1 */
93 #define InterFrameGap 0x03 /* 3 means InterFrameGap = the shortest one */
95 #define NUM_TX_DESC 1 /* Number of Tx descriptor registers */
96 #define NUM_RX_DESC 4 /* Number of Rx descriptor registers */
97 #define RX_BUF_SIZE 1536 /* Rx Buffer size */
98 #define RX_BUF_LEN 8192
100 #define RTL_MIN_IO_SIZE 0x80
101 #define TX_TIMEOUT (6*HZ)
103 /* write/read MMIO register. Notice: {read,write}[wl] do the necessary swapping */
104 #define RTL_W8(reg, val8) writeb ((val8), ioaddr + (reg))
105 #define RTL_W16(reg, val16) writew ((val16), ioaddr + (reg))
106 #define RTL_W32(reg, val32) writel ((val32), ioaddr + (reg))
107 #define RTL_R8(reg) readb (ioaddr + (reg))
108 #define RTL_R16(reg) readw (ioaddr + (reg))
109 #define RTL_R32(reg) ((unsigned long) readl (ioaddr + (reg)))
111 #define ETH_FRAME_LEN MAX_ETH_FRAME_SIZE
112 #define ETH_ALEN MAC_ADDR_LEN
115 enum RTL8169_registers {
116 MAC0 = 0, /* Ethernet hardware address. */
117 MAR0 = 8, /* Multicast filter. */
118 TxDescStartAddr = 0x20,
119 TxHDescStartAddr = 0x28,
144 RxDescStartAddr = 0xE4,
147 FuncEventMask = 0xF4,
148 FuncPresetState = 0xF8,
149 FuncForceEvent = 0xFC,
152 enum RTL8169_register_content {
153 /*InterruptStatusBits */
157 TxDescUnavail = 0x80,
180 Cfg9346_Unlock = 0xC0,
185 AcceptBroadcast = 0x08,
186 AcceptMulticast = 0x04,
188 AcceptAllPhys = 0x01,
195 TxInterFrameGapShift = 24,
196 TxDMAShift = 8, /* DMA burst value (0-7) is shift this many bits */
198 /*rtl8169_PHYstatus */
208 /*GIGABIT_PHY_registers */
211 PHY_AUTO_NEGO_REG = 4,
212 PHY_1000_CTRL_REG = 9,
214 /*GIGABIT_PHY_REG_BIT */
215 PHY_Restart_Auto_Nego = 0x0200,
216 PHY_Enable_Auto_Nego = 0x1000,
218 /* PHY_STAT_REG = 1; */
219 PHY_Auto_Nego_Comp = 0x0020,
221 /* PHY_AUTO_NEGO_REG = 4; */
222 PHY_Cap_10_Half = 0x0020,
223 PHY_Cap_10_Full = 0x0040,
224 PHY_Cap_100_Half = 0x0080,
225 PHY_Cap_100_Full = 0x0100,
227 /* PHY_1000_CTRL_REG = 9; */
228 PHY_Cap_1000_Full = 0x0200,
240 TBILinkOK = 0x02000000,
245 u8 version; /* depend on RTL8169 docs */
246 u32 RxConfigMask; /* should clear the bits supported by this chip */
247 } rtl_chip_info[] = {
248 {"RTL-8169", 0x00, 0xff7e1880,},
249 {"RTL-8169", 0x04, 0xff7e1880,},
252 enum _DescStatusBit {
273 /* Define the TX Descriptor */
274 static u8 tx_ring[NUM_TX_DESC * sizeof(struct TxDesc) + 256];
275 /* __attribute__ ((aligned(256))); */
277 /* Create a static buffer of size RX_BUF_SZ for each
278 TX Descriptor. All descriptors point to a
279 part of this buffer */
280 static unsigned char txb[NUM_TX_DESC * RX_BUF_SIZE];
282 /* Define the RX Descriptor */
283 static u8 rx_ring[NUM_RX_DESC * sizeof(struct TxDesc) + 256];
284 /* __attribute__ ((aligned(256))); */
286 /* Create a static buffer of size RX_BUF_SZ for each
287 RX Descriptor All descriptors point to a
288 part of this buffer */
289 static unsigned char rxb[NUM_RX_DESC * RX_BUF_SIZE];
291 struct rtl8169_private {
292 void *mmio_addr; /* memory map physical address */
294 unsigned long cur_rx; /* Index into the Rx descriptor buffer of next Rx pkt. */
295 unsigned long cur_tx; /* Index into the Tx descriptor buffer of next Rx pkt. */
296 unsigned long dirty_tx;
297 unsigned char *TxDescArrays; /* Index of Tx Descriptor buffer */
298 unsigned char *RxDescArrays; /* Index of Rx Descriptor buffer */
299 struct TxDesc *TxDescArray; /* Index of 256-alignment Tx Descriptor buffer */
300 struct RxDesc *RxDescArray; /* Index of 256-alignment Rx Descriptor buffer */
301 unsigned char *RxBufferRings; /* Index of Rx Buffer */
302 unsigned char *RxBufferRing[NUM_RX_DESC]; /* Index of Rx Buffer array */
303 unsigned char *Tx_skbuff[NUM_TX_DESC];
306 static struct rtl8169_private *tpc;
308 static const u16 rtl8169_intr_mask =
309 SYSErr | PCSTimeout | RxUnderrun | RxOverflow | RxFIFOOver | TxErr |
311 static const unsigned int rtl8169_rx_config =
312 (RX_FIFO_THRESH << RxCfgFIFOShift) | (RX_DMA_BURST << RxCfgDMAShift);
314 static struct pci_device_id supported[] = {
315 {PCI_VENDOR_ID_REALTEK, 0x8169},
319 void mdio_write(int RegAddr, int value)
323 RTL_W32(PHYAR, 0x80000000 | (RegAddr & 0xFF) << 16 | value);
326 for (i = 2000; i > 0; i--) {
327 /* Check if the RTL8169 has completed writing to the specified MII register */
328 if (!(RTL_R32(PHYAR) & 0x80000000)) {
336 int mdio_read(int RegAddr)
340 RTL_W32(PHYAR, 0x0 | (RegAddr & 0xFF) << 16);
343 for (i = 2000; i > 0; i--) {
344 /* Check if the RTL8169 has completed retrieving data from the specified MII register */
345 if (RTL_R32(PHYAR) & 0x80000000) {
346 value = (int) (RTL_R32(PHYAR) & 0xFFFF);
355 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
357 static int rtl8169_init_board(struct eth_device *dev)
363 printf ("%s\n", __FUNCTION__);
365 ioaddr = dev->iobase;
367 /* Soft reset the chip. */
368 RTL_W8(ChipCmd, CmdReset);
370 /* Check that the chip has finished the reset. */
371 for (i = 1000; i > 0; i--)
372 if ((RTL_R8(ChipCmd) & CmdReset) == 0)
377 /* identify chip attached to board */
378 tmp = RTL_R32(TxConfig);
379 tmp = ((tmp & 0x7c000000) + ((tmp & 0x00800000) << 2)) >> 24;
381 for (i = ARRAY_SIZE(rtl_chip_info) - 1; i >= 0; i--){
382 if (tmp == rtl_chip_info[i].version) {
388 /* if unknown chip, assume array element #0, original RTL-8169 in this case */
389 printf("PCI device %s: unknown chip version, assuming RTL-8169\n", dev->name);
390 printf("PCI device: TxConfig = 0x%hX\n", (unsigned long) RTL_R32(TxConfig));
397 /**************************************************************************
398 RECV - Receive a frame
399 ***************************************************************************/
400 static int rtl_recv(struct eth_device *dev)
402 /* return true if there's an ethernet packet ready to read */
403 /* nic->packet should contain data on return */
404 /* nic->packetlen should contain length of data */
408 #ifdef DEBUG_RTL8169_RX
409 printf ("%s\n", __FUNCTION__);
411 ioaddr = dev->iobase;
413 cur_rx = tpc->cur_rx;
414 if ((le32_to_cpu(tpc->RxDescArray[cur_rx].status) & OWNbit) == 0) {
415 if (!(le32_to_cpu(tpc->RxDescArray[cur_rx].status) & RxRES)) {
416 unsigned char rxdata[RX_BUF_LEN];
417 length = (int) (le32_to_cpu(tpc->RxDescArray[cur_rx].
418 status) & 0x00001FFF) - 4;
420 memcpy(rxdata, tpc->RxBufferRing[cur_rx], length);
421 NetReceive(rxdata, length);
423 if (cur_rx == NUM_RX_DESC - 1)
424 tpc->RxDescArray[cur_rx].status =
425 cpu_to_le32((OWNbit | EORbit) + RX_BUF_SIZE);
427 tpc->RxDescArray[cur_rx].status =
428 cpu_to_le32(OWNbit + RX_BUF_SIZE);
429 tpc->RxDescArray[cur_rx].buf_addr =
430 cpu_to_le32(tpc->RxBufferRing[cur_rx]);
434 cur_rx = (cur_rx + 1) % NUM_RX_DESC;
435 tpc->cur_rx = cur_rx;
439 tpc->cur_rx = cur_rx;
440 return (0); /* initially as this is called to flush the input */
444 /**************************************************************************
445 SEND - Transmit a frame
446 ***************************************************************************/
447 static int rtl_send(struct eth_device *dev, volatile void *packet, int length)
449 /* send the packet to destination */
453 int entry = tpc->cur_tx % NUM_TX_DESC;
457 #ifdef DEBUG_RTL8169_TX
458 int stime = currticks();
459 printf ("%s\n", __FUNCTION__);
460 printf("sending %d bytes\n", len);
463 ioaddr = dev->iobase;
465 /* point to the current txb incase multiple tx_rings are used */
466 ptxb = tpc->Tx_skbuff[entry * MAX_ETH_FRAME_SIZE];
467 memcpy(ptxb, (char *)packet, (int)length);
469 while (len < ETH_ZLEN)
472 tpc->TxDescArray[entry].buf_addr = cpu_to_le32(ptxb);
473 if (entry != (NUM_TX_DESC - 1)) {
474 tpc->TxDescArray[entry].status =
475 cpu_to_le32((OWNbit | FSbit | LSbit) |
476 ((len > ETH_ZLEN) ? len : ETH_ZLEN));
478 tpc->TxDescArray[entry].status =
479 cpu_to_le32((OWNbit | EORbit | FSbit | LSbit) |
480 ((len > ETH_ZLEN) ? len : ETH_ZLEN));
482 RTL_W8(TxPoll, 0x40); /* set polling bit */
485 to = currticks() + TX_TIMEOUT;
486 while ((le32_to_cpu(tpc->TxDescArray[entry].status) & OWNbit)
487 && (currticks() < to)); /* wait */
489 if (currticks() >= to) {
490 #ifdef DEBUG_RTL8169_TX
491 puts ("tx timeout/error\n");
492 printf ("%s elapsed time : %d\n", __FUNCTION__, currticks()-stime);
496 #ifdef DEBUG_RTL8169_TX
501 /* Delay to make net console (nc) work properly */
506 static void rtl8169_set_rx_mode(struct eth_device *dev)
508 u32 mc_filter[2]; /* Multicast hash filter */
513 printf ("%s\n", __FUNCTION__);
517 /* Too many to filter perfectly -- accept all multicasts. */
518 rx_mode = AcceptBroadcast | AcceptMulticast | AcceptMyPhys;
519 mc_filter[1] = mc_filter[0] = 0xffffffff;
521 tmp = rtl8169_rx_config | rx_mode | (RTL_R32(RxConfig) &
522 rtl_chip_info[tpc->chipset].RxConfigMask);
524 RTL_W32(RxConfig, tmp);
525 RTL_W32(MAR0 + 0, mc_filter[0]);
526 RTL_W32(MAR0 + 4, mc_filter[1]);
529 static void rtl8169_hw_start(struct eth_device *dev)
534 int stime = currticks();
535 printf ("%s\n", __FUNCTION__);
539 /* Soft reset the chip. */
540 RTL_W8(ChipCmd, CmdReset);
542 /* Check that the chip has finished the reset. */
543 for (i = 1000; i > 0; i--) {
544 if ((RTL_R8(ChipCmd) & CmdReset) == 0)
551 RTL_W8(Cfg9346, Cfg9346_Unlock);
552 RTL_W8(ChipCmd, CmdTxEnb | CmdRxEnb);
553 RTL_W8(EarlyTxThres, EarlyTxThld);
555 /* For gigabit rtl8169 */
556 RTL_W16(RxMaxSize, RxPacketMaxSize);
558 /* Set Rx Config register */
559 i = rtl8169_rx_config | (RTL_R32(RxConfig) &
560 rtl_chip_info[tpc->chipset].RxConfigMask);
561 RTL_W32(RxConfig, i);
563 /* Set DMA burst size and Interframe Gap Time */
564 RTL_W32(TxConfig, (TX_DMA_BURST << TxDMAShift) |
565 (InterFrameGap << TxInterFrameGapShift));
570 RTL_W32(TxDescStartAddr, tpc->TxDescArray);
571 RTL_W32(RxDescStartAddr, tpc->RxDescArray);
572 RTL_W8(Cfg9346, Cfg9346_Lock);
575 RTL_W32(RxMissed, 0);
577 rtl8169_set_rx_mode(dev);
579 /* no early-rx interrupts */
580 RTL_W16(MultiIntr, RTL_R16(MultiIntr) & 0xF000);
583 printf ("%s elapsed time : %d\n", __FUNCTION__, currticks()-stime);
587 static void rtl8169_init_ring(struct eth_device *dev)
592 int stime = currticks();
593 printf ("%s\n", __FUNCTION__);
599 memset(tpc->TxDescArray, 0x0, NUM_TX_DESC * sizeof(struct TxDesc));
600 memset(tpc->RxDescArray, 0x0, NUM_RX_DESC * sizeof(struct RxDesc));
602 for (i = 0; i < NUM_TX_DESC; i++) {
603 tpc->Tx_skbuff[i] = &txb[i];
606 for (i = 0; i < NUM_RX_DESC; i++) {
607 if (i == (NUM_RX_DESC - 1))
608 tpc->RxDescArray[i].status =
609 cpu_to_le32((OWNbit | EORbit) + RX_BUF_SIZE);
611 tpc->RxDescArray[i].status =
612 cpu_to_le32(OWNbit + RX_BUF_SIZE);
614 tpc->RxBufferRing[i] = &rxb[i * RX_BUF_SIZE];
615 tpc->RxDescArray[i].buf_addr =
616 cpu_to_le32(tpc->RxBufferRing[i]);
620 printf ("%s elapsed time : %d\n", __FUNCTION__, currticks()-stime);
624 /**************************************************************************
625 RESET - Finish setting up the ethernet interface
626 ***************************************************************************/
627 static int rtl_reset(struct eth_device *dev, bd_t *bis)
632 int stime = currticks();
633 printf ("%s\n", __FUNCTION__);
636 tpc->TxDescArrays = tx_ring;
637 /* Tx Desscriptor needs 256 bytes alignment; */
638 tpc->TxDescArray = (struct TxDesc *) ((unsigned long)(tpc->TxDescArrays +
641 tpc->RxDescArrays = rx_ring;
642 /* Rx Desscriptor needs 256 bytes alignment; */
643 tpc->RxDescArray = (struct RxDesc *) ((unsigned long)(tpc->RxDescArrays +
646 rtl8169_init_ring(dev);
647 rtl8169_hw_start(dev);
648 /* Construct a perfect filter frame with the mac address as first match
649 * and broadcast for all others */
650 for (i = 0; i < 192; i++)
653 txb[0] = dev->enetaddr[0];
654 txb[1] = dev->enetaddr[1];
655 txb[2] = dev->enetaddr[2];
656 txb[3] = dev->enetaddr[3];
657 txb[4] = dev->enetaddr[4];
658 txb[5] = dev->enetaddr[5];
661 printf ("%s elapsed time : %d\n", __FUNCTION__, currticks()-stime);
666 /**************************************************************************
667 HALT - Turn off ethernet interface
668 ***************************************************************************/
669 static void rtl_halt(struct eth_device *dev)
674 printf ("%s\n", __FUNCTION__);
677 ioaddr = dev->iobase;
679 /* Stop the chip's Tx and Rx DMA processes. */
680 RTL_W8(ChipCmd, 0x00);
682 /* Disable interrupts by clearing the interrupt mask. */
683 RTL_W16(IntrMask, 0x0000);
685 RTL_W32(RxMissed, 0);
687 tpc->TxDescArrays = NULL;
688 tpc->RxDescArrays = NULL;
689 tpc->TxDescArray = NULL;
690 tpc->RxDescArray = NULL;
691 for (i = 0; i < NUM_RX_DESC; i++) {
692 tpc->RxBufferRing[i] = NULL;
696 /**************************************************************************
697 INIT - Look for an adapter, this routine's visible to the outside
698 ***************************************************************************/
700 #define board_found 1
702 static int rtl_init(struct eth_device *dev, bd_t *bis)
704 static int board_idx = -1;
705 static int printed_version = 0;
707 int option = -1, Cap10_100 = 0, Cap1000 = 0;
710 printf ("%s\n", __FUNCTION__);
713 ioaddr = dev->iobase;
719 /* point to private storage */
722 rc = rtl8169_init_board(dev);
726 /* Get MAC address. FIXME: read EEPROM */
727 for (i = 0; i < MAC_ADDR_LEN; i++)
728 bis->bi_enetaddr[i] = dev->enetaddr[i] = RTL_R8(MAC0 + i);
731 printf("MAC Address");
732 for (i = 0; i < MAC_ADDR_LEN; i++)
733 printf(":%02x", dev->enetaddr[i]);
738 /* Print out some hardware info */
739 printf("%s: at ioaddr 0x%x\n", dev->name, ioaddr);
742 /* if TBI is not endbled */
743 if (!(RTL_R8(PHYstatus) & TBI_Enable)) {
744 int val = mdio_read(PHY_AUTO_NEGO_REG);
746 option = (board_idx >= MAX_UNITS) ? 0 : media[board_idx];
747 /* Force RTL8169 in 10/100/1000 Full/Half mode. */
750 printf("%s: Force-mode Enabled.\n", dev->name);
752 Cap10_100 = 0, Cap1000 = 0;
755 Cap10_100 = PHY_Cap_10_Half;
756 Cap1000 = PHY_Cap_Null;
759 Cap10_100 = PHY_Cap_10_Full;
760 Cap1000 = PHY_Cap_Null;
763 Cap10_100 = PHY_Cap_100_Half;
764 Cap1000 = PHY_Cap_Null;
767 Cap10_100 = PHY_Cap_100_Full;
768 Cap1000 = PHY_Cap_Null;
771 Cap10_100 = PHY_Cap_Null;
772 Cap1000 = PHY_Cap_1000_Full;
777 mdio_write(PHY_AUTO_NEGO_REG, Cap10_100 | (val & 0x1F)); /* leave PHY_AUTO_NEGO_REG bit4:0 unchanged */
778 mdio_write(PHY_1000_CTRL_REG, Cap1000);
781 printf("%s: Auto-negotiation Enabled.\n",
784 /* enable 10/100 Full/Half Mode, leave PHY_AUTO_NEGO_REG bit4:0 unchanged */
785 mdio_write(PHY_AUTO_NEGO_REG,
786 PHY_Cap_10_Half | PHY_Cap_10_Full |
787 PHY_Cap_100_Half | PHY_Cap_100_Full |
790 /* enable 1000 Full Mode */
791 mdio_write(PHY_1000_CTRL_REG, PHY_Cap_1000_Full);
795 /* Enable auto-negotiation and restart auto-nigotiation */
796 mdio_write(PHY_CTRL_REG,
797 PHY_Enable_Auto_Nego | PHY_Restart_Auto_Nego);
800 /* wait for auto-negotiation process */
801 for (i = 10000; i > 0; i--) {
802 /* check if auto-negotiation complete */
803 if (mdio_read(PHY_STAT_REG) & PHY_Auto_Nego_Comp) {
805 option = RTL_R8(PHYstatus);
806 if (option & _1000bpsF) {
808 printf("%s: 1000Mbps Full-duplex operation.\n",
813 printf("%s: %sMbps %s-duplex operation.\n",
815 (option & _100bps) ? "100" :
817 (option & FullDup) ? "Full" :
825 } /* end for-loop to wait for auto-negotiation process */
831 ("%s: 1000Mbps Full-duplex operation, TBI Link %s!\n",
833 (RTL_R32(TBICSR) & TBILinkOK) ? "OK" : "Failed");
840 int rtl8169_initialize(bd_t *bis)
844 struct eth_device *dev;
850 if ((devno = pci_find_devices(supported, idx++)) < 0)
853 pci_read_config_dword(devno, PCI_BASE_ADDRESS_1, &iobase);
856 debug ("rtl8169: REALTEK RTL8169 @0x%x\n", iobase);
858 dev = (struct eth_device *)malloc(sizeof *dev);
860 sprintf (dev->name, "RTL8169#%d", card_number);
862 dev->priv = (void *) devno;
863 dev->iobase = (int)pci_mem_to_phys(devno, iobase);
865 dev->init = rtl_reset;
866 dev->halt = rtl_halt;
867 dev->send = rtl_send;
868 dev->recv = rtl_recv;