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63f34912 WD |
1 | /* |
2 | * rtl8139.c : U-Boot driver for the RealTek RTL8139 | |
3 | * | |
4 | * Masami Komiya (mkomiya@sonare.it) | |
5 | * | |
6 | * Most part is taken from rtl8139.c of etherboot | |
7 | * | |
8 | */ | |
9 | ||
10 | /* rtl8139.c - etherboot driver for the Realtek 8139 chipset | |
11 | ||
12 | ported from the linux driver written by Donald Becker | |
13 | by Rainer Bawidamann (Rainer.Bawidamann@informatik.uni-ulm.de) 1999 | |
14 | ||
15 | This software may be used and distributed according to the terms | |
16 | of the GNU Public License, incorporated herein by reference. | |
17 | ||
18 | changes to the original driver: | |
19 | - removed support for interrupts, switching to polling mode (yuck!) | |
20 | - removed support for the 8129 chip (external MII) | |
21 | ||
22 | */ | |
23 | ||
24 | /*********************************************************************/ | |
25 | /* Revision History */ | |
26 | /*********************************************************************/ | |
27 | ||
28 | /* | |
29 | 28 Dec 2002 ken_yap@users.sourceforge.net (Ken Yap) | |
30 | Put in virt_to_bus calls to allow Etherboot relocation. | |
31 | ||
32 | 06 Apr 2001 ken_yap@users.sourceforge.net (Ken Yap) | |
33 | Following email from Hyun-Joon Cha, added a disable routine, otherwise | |
34 | NIC remains live and can crash the kernel later. | |
35 | ||
36 | 4 Feb 2000 espenlaub@informatik.uni-ulm.de (Klaus Espenlaub) | |
37 | Shuffled things around, removed the leftovers from the 8129 support | |
38 | that was in the Linux driver and added a bit more 8139 definitions. | |
39 | Moved the 8K receive buffer to a fixed, available address outside the | |
40 | 0x98000-0x9ffff range. This is a bit of a hack, but currently the only | |
41 | way to make room for the Etherboot features that need substantial amounts | |
42 | of code like the ANSI console support. Currently the buffer is just below | |
43 | 0x10000, so this even conforms to the tagged boot image specification, | |
44 | which reserves the ranges 0x00000-0x10000 and 0x98000-0xA0000. My | |
45 | interpretation of this "reserved" is that Etherboot may do whatever it | |
46 | likes, as long as its environment is kept intact (like the BIOS | |
b6e4c403 | 47 | variables). Hopefully fixed rtl_poll() once and for all. The symptoms |
63f34912 WD |
48 | were that if Etherboot was left at the boot menu for several minutes, the |
49 | first eth_poll failed. Seems like I am the only person who does this. | |
50 | First of all I fixed the debugging code and then set out for a long bug | |
51 | hunting session. It took me about a week full time work - poking around | |
52 | various places in the driver, reading Don Becker's and Jeff Garzik's Linux | |
53 | driver and even the FreeBSD driver (what a piece of crap!) - and | |
54 | eventually spotted the nasty thing: the transmit routine was acknowledging | |
55 | each and every interrupt pending, including the RxOverrun and RxFIFIOver | |
b6e4c403 | 56 | interrupts. This confused the RTL8139 thoroughly. It destroyed the |
63f34912 WD |
57 | Rx ring contents by dumping the 2K FIFO contents right where we wanted to |
58 | get the next packet. Oh well, what fun. | |
59 | ||
b6e4c403 | 60 | 18 Jan 2000 mdc@thinguin.org (Marty Connor) |
63f34912 WD |
61 | Drastically simplified error handling. Basically, if any error |
62 | in transmission or reception occurs, the card is reset. | |
63 | Also, pointed all transmit descriptors to the same buffer to | |
b6e4c403 | 64 | save buffer space. This should decrease driver size and avoid |
63f34912 WD |
65 | corruption because of exceeding 32K during runtime. |
66 | ||
b6e4c403 | 67 | 28 Jul 1999 (Matthias Meixner - meixner@rbg.informatik.tu-darmstadt.de) |
63f34912 WD |
68 | rtl_poll was quite broken: it used the RxOK interrupt flag instead |
69 | of the RxBufferEmpty flag which often resulted in very bad | |
70 | transmission performace - below 1kBytes/s. | |
71 | ||
72 | */ | |
73 | ||
74 | #include <common.h> | |
75 | #include <malloc.h> | |
76 | #include <net.h> | |
0b252f50 | 77 | #include <netdev.h> |
63f34912 WD |
78 | #include <asm/io.h> |
79 | #include <pci.h> | |
80 | ||
d1276c76 | 81 | #define RTL_TIMEOUT 100000 |
63f34912 WD |
82 | |
83 | #define ETH_FRAME_LEN 1514 | |
84 | #define ETH_ALEN 6 | |
85 | #define ETH_ZLEN 60 | |
86 | ||
87 | /* PCI Tuning Parameters | |
88 | Threshold is bytes transferred to chip before transmission starts. */ | |
b6e4c403 WD |
89 | #define TX_FIFO_THRESH 256 /* In bytes, rounded down to 32 byte units. */ |
90 | #define RX_FIFO_THRESH 4 /* Rx buffer level before first PCI xfer. */ | |
91 | #define RX_DMA_BURST 4 /* Maximum PCI burst, '4' is 256 bytes */ | |
92 | #define TX_DMA_BURST 4 /* Calculate as 16<<val. */ | |
93 | #define NUM_TX_DESC 4 /* Number of Tx descriptor registers. */ | |
63f34912 WD |
94 | #define TX_BUF_SIZE ETH_FRAME_LEN /* FCS is added by the chip */ |
95 | #define RX_BUF_LEN_IDX 0 /* 0, 1, 2 is allowed - 8,16,32K rx buffer */ | |
96 | #define RX_BUF_LEN (8192 << RX_BUF_LEN_IDX) | |
97 | ||
98 | #undef DEBUG_TX | |
99 | #undef DEBUG_RX | |
100 | ||
101 | #define currticks() get_timer(0) | |
b6e4c403 WD |
102 | #define bus_to_phys(a) pci_mem_to_phys((pci_dev_t)dev->priv, a) |
103 | #define phys_to_bus(a) pci_phys_to_mem((pci_dev_t)dev->priv, a) | |
63f34912 WD |
104 | |
105 | /* Symbolic offsets to registers. */ | |
106 | enum RTL8139_registers { | |
107 | MAC0=0, /* Ethernet hardware address. */ | |
108 | MAR0=8, /* Multicast filter. */ | |
109 | TxStatus0=0x10, /* Transmit status (four 32bit registers). */ | |
110 | TxAddr0=0x20, /* Tx descriptors (also four 32bit). */ | |
111 | RxBuf=0x30, RxEarlyCnt=0x34, RxEarlyStatus=0x36, | |
112 | ChipCmd=0x37, RxBufPtr=0x38, RxBufAddr=0x3A, | |
113 | IntrMask=0x3C, IntrStatus=0x3E, | |
114 | TxConfig=0x40, RxConfig=0x44, | |
115 | Timer=0x48, /* general-purpose counter. */ | |
116 | RxMissed=0x4C, /* 24 bits valid, write clears. */ | |
117 | Cfg9346=0x50, Config0=0x51, Config1=0x52, | |
118 | TimerIntrReg=0x54, /* intr if gp counter reaches this value */ | |
119 | MediaStatus=0x58, | |
120 | Config3=0x59, | |
121 | MultiIntr=0x5C, | |
122 | RevisionID=0x5E, /* revision of the RTL8139 chip */ | |
123 | TxSummary=0x60, | |
124 | MII_BMCR=0x62, MII_BMSR=0x64, NWayAdvert=0x66, NWayLPAR=0x68, | |
125 | NWayExpansion=0x6A, | |
126 | DisconnectCnt=0x6C, FalseCarrierCnt=0x6E, | |
127 | NWayTestReg=0x70, | |
128 | RxCnt=0x72, /* packet received counter */ | |
129 | CSCR=0x74, /* chip status and configuration register */ | |
130 | PhyParm1=0x78,TwisterParm=0x7c,PhyParm2=0x80, /* undocumented */ | |
131 | /* from 0x84 onwards are a number of power management/wakeup frame | |
132 | * definitions we will probably never need to know about. */ | |
133 | }; | |
134 | ||
135 | enum ChipCmdBits { | |
136 | CmdReset=0x10, CmdRxEnb=0x08, CmdTxEnb=0x04, RxBufEmpty=0x01, }; | |
137 | ||
138 | /* Interrupt register bits, using my own meaningful names. */ | |
139 | enum IntrStatusBits { | |
140 | PCIErr=0x8000, PCSTimeout=0x4000, CableLenChange= 0x2000, | |
141 | RxFIFOOver=0x40, RxUnderrun=0x20, RxOverflow=0x10, | |
142 | TxErr=0x08, TxOK=0x04, RxErr=0x02, RxOK=0x01, | |
143 | }; | |
144 | enum TxStatusBits { | |
145 | TxHostOwns=0x2000, TxUnderrun=0x4000, TxStatOK=0x8000, | |
146 | TxOutOfWindow=0x20000000, TxAborted=0x40000000, | |
147 | TxCarrierLost=0x80000000, | |
148 | }; | |
149 | enum RxStatusBits { | |
150 | RxMulticast=0x8000, RxPhysical=0x4000, RxBroadcast=0x2000, | |
151 | RxBadSymbol=0x0020, RxRunt=0x0010, RxTooLong=0x0008, RxCRCErr=0x0004, | |
152 | RxBadAlign=0x0002, RxStatusOK=0x0001, | |
153 | }; | |
154 | ||
155 | enum MediaStatusBits { | |
156 | MSRTxFlowEnable=0x80, MSRRxFlowEnable=0x40, MSRSpeed10=0x08, | |
157 | MSRLinkFail=0x04, MSRRxPauseFlag=0x02, MSRTxPauseFlag=0x01, | |
158 | }; | |
159 | ||
160 | enum MIIBMCRBits { | |
161 | BMCRReset=0x8000, BMCRSpeed100=0x2000, BMCRNWayEnable=0x1000, | |
162 | BMCRRestartNWay=0x0200, BMCRDuplex=0x0100, | |
163 | }; | |
164 | ||
165 | enum CSCRBits { | |
166 | CSCR_LinkOKBit=0x0400, CSCR_LinkChangeBit=0x0800, | |
167 | CSCR_LinkStatusBits=0x0f000, CSCR_LinkDownOffCmd=0x003c0, | |
168 | CSCR_LinkDownCmd=0x0f3c0, | |
169 | }; | |
170 | ||
171 | /* Bits in RxConfig. */ | |
172 | enum rx_mode_bits { | |
173 | RxCfgWrap=0x80, | |
174 | AcceptErr=0x20, AcceptRunt=0x10, AcceptBroadcast=0x08, | |
175 | AcceptMulticast=0x04, AcceptMyPhys=0x02, AcceptAllPhys=0x01, | |
176 | }; | |
177 | ||
178 | static int ioaddr; | |
179 | static unsigned int cur_rx,cur_tx; | |
180 | ||
181 | /* The RTL8139 can only transmit from a contiguous, aligned memory block. */ | |
182 | static unsigned char tx_buffer[TX_BUF_SIZE] __attribute__((aligned(4))); | |
183 | static unsigned char rx_ring[RX_BUF_LEN+16] __attribute__((aligned(4))); | |
184 | ||
185 | static int rtl8139_probe(struct eth_device *dev, bd_t *bis); | |
186 | static int read_eeprom(int location, int addr_len); | |
187 | static void rtl_reset(struct eth_device *dev); | |
188 | static int rtl_transmit(struct eth_device *dev, volatile void *packet, int length); | |
189 | static int rtl_poll(struct eth_device *dev); | |
190 | static void rtl_disable(struct eth_device *dev); | |
53a5c424 | 191 | #ifdef CONFIG_MCAST_TFTP/* This driver already accepts all b/mcast */ |
85eb5caf WD |
192 | static int rtl_bcast_addr (struct eth_device *dev, u8 bcast_mac, u8 set) |
193 | { | |
194 | return (0); | |
195 | } | |
53a5c424 | 196 | #endif |
63f34912 WD |
197 | |
198 | static struct pci_device_id supported[] = { | |
199 | {PCI_VENDOR_ID_REALTEK, PCI_DEVICE_ID_REALTEK_8139}, | |
da012ab6 | 200 | {PCI_VENDOR_ID_DLINK, PCI_DEVICE_ID_DLINK_8139}, |
63f34912 WD |
201 | {} |
202 | }; | |
203 | ||
204 | int rtl8139_initialize(bd_t *bis) | |
205 | { | |
206 | pci_dev_t devno; | |
207 | int card_number = 0; | |
208 | struct eth_device *dev; | |
209 | u32 iobase; | |
210 | int idx=0; | |
211 | ||
212 | while(1){ | |
213 | /* Find RTL8139 */ | |
214 | if ((devno = pci_find_devices(supported, idx++)) < 0) | |
215 | break; | |
216 | ||
217 | pci_read_config_dword(devno, PCI_BASE_ADDRESS_1, &iobase); | |
218 | iobase &= ~0xf; | |
219 | ||
220 | debug ("rtl8139: REALTEK RTL8139 @0x%x\n", iobase); | |
221 | ||
222 | dev = (struct eth_device *)malloc(sizeof *dev); | |
223 | ||
224 | sprintf (dev->name, "RTL8139#%d", card_number); | |
225 | ||
226 | dev->priv = (void *) devno; | |
227 | dev->iobase = (int)bus_to_phys(iobase); | |
228 | dev->init = rtl8139_probe; | |
229 | dev->halt = rtl_disable; | |
230 | dev->send = rtl_transmit; | |
231 | dev->recv = rtl_poll; | |
53a5c424 DU |
232 | #ifdef CONFIG_MCAST_TFTP |
233 | dev->mcast = rtl_bcast_addr; | |
234 | #endif | |
63f34912 WD |
235 | |
236 | eth_register (dev); | |
237 | ||
238 | card_number++; | |
239 | ||
240 | pci_write_config_byte (devno, PCI_LATENCY_TIMER, 0x20); | |
241 | ||
242 | udelay (10 * 1000); | |
243 | } | |
244 | ||
245 | return card_number; | |
246 | } | |
247 | ||
248 | static int rtl8139_probe(struct eth_device *dev, bd_t *bis) | |
249 | { | |
250 | int i; | |
251 | int speed10, fullduplex; | |
252 | int addr_len; | |
253 | unsigned short *ap = (unsigned short *)dev->enetaddr; | |
254 | ||
255 | ioaddr = dev->iobase; | |
256 | ||
257 | /* Bring the chip out of low-power mode. */ | |
258 | outb(0x00, ioaddr + Config1); | |
259 | ||
260 | addr_len = read_eeprom(0,8) == 0x8129 ? 8 : 6; | |
261 | for (i = 0; i < 3; i++) | |
756f586a | 262 | *ap++ = le16_to_cpu (read_eeprom(i + 7, addr_len)); |
63f34912 WD |
263 | |
264 | speed10 = inb(ioaddr + MediaStatus) & MSRSpeed10; | |
265 | fullduplex = inw(ioaddr + MII_BMCR) & BMCRDuplex; | |
266 | ||
267 | rtl_reset(dev); | |
268 | ||
269 | if (inb(ioaddr + MediaStatus) & MSRLinkFail) { | |
270 | printf("Cable not connected or other link failure\n"); | |
422b1a01 | 271 | return -1 ; |
63f34912 WD |
272 | } |
273 | ||
422b1a01 | 274 | return 0; |
63f34912 WD |
275 | } |
276 | ||
277 | /* Serial EEPROM section. */ | |
278 | ||
279 | /* EEPROM_Ctrl bits. */ | |
b6e4c403 WD |
280 | #define EE_SHIFT_CLK 0x04 /* EEPROM shift clock. */ |
281 | #define EE_CS 0x08 /* EEPROM chip select. */ | |
282 | #define EE_DATA_WRITE 0x02 /* EEPROM chip data in. */ | |
283 | #define EE_WRITE_0 0x00 | |
284 | #define EE_WRITE_1 0x02 | |
285 | #define EE_DATA_READ 0x01 /* EEPROM chip data out. */ | |
63f34912 WD |
286 | #define EE_ENB (0x80 | EE_CS) |
287 | ||
288 | /* | |
289 | Delay between EEPROM clock transitions. | |
8ed44d91 | 290 | No extra delay is needed with 33MHz PCI, but 66MHz may change this. |
63f34912 WD |
291 | */ |
292 | ||
b6e4c403 | 293 | #define eeprom_delay() inl(ee_addr) |
63f34912 WD |
294 | |
295 | /* The EEPROM commands include the alway-set leading bit. */ | |
b6e4c403 WD |
296 | #define EE_WRITE_CMD (5) |
297 | #define EE_READ_CMD (6) | |
298 | #define EE_ERASE_CMD (7) | |
63f34912 WD |
299 | |
300 | static int read_eeprom(int location, int addr_len) | |
301 | { | |
302 | int i; | |
303 | unsigned int retval = 0; | |
304 | long ee_addr = ioaddr + Cfg9346; | |
305 | int read_cmd = location | (EE_READ_CMD << addr_len); | |
306 | ||
307 | outb(EE_ENB & ~EE_CS, ee_addr); | |
308 | outb(EE_ENB, ee_addr); | |
309 | eeprom_delay(); | |
310 | ||
311 | /* Shift the read command bits out. */ | |
312 | for (i = 4 + addr_len; i >= 0; i--) { | |
313 | int dataval = (read_cmd & (1 << i)) ? EE_DATA_WRITE : 0; | |
314 | outb(EE_ENB | dataval, ee_addr); | |
315 | eeprom_delay(); | |
316 | outb(EE_ENB | dataval | EE_SHIFT_CLK, ee_addr); | |
317 | eeprom_delay(); | |
318 | } | |
319 | outb(EE_ENB, ee_addr); | |
320 | eeprom_delay(); | |
321 | ||
322 | for (i = 16; i > 0; i--) { | |
323 | outb(EE_ENB | EE_SHIFT_CLK, ee_addr); | |
324 | eeprom_delay(); | |
325 | retval = (retval << 1) | ((inb(ee_addr) & EE_DATA_READ) ? 1 : 0); | |
326 | outb(EE_ENB, ee_addr); | |
327 | eeprom_delay(); | |
328 | } | |
329 | ||
330 | /* Terminate the EEPROM access. */ | |
331 | outb(~EE_CS, ee_addr); | |
332 | eeprom_delay(); | |
333 | return retval; | |
334 | } | |
335 | ||
336 | static const unsigned int rtl8139_rx_config = | |
337 | (RX_BUF_LEN_IDX << 11) | | |
338 | (RX_FIFO_THRESH << 13) | | |
339 | (RX_DMA_BURST << 8); | |
340 | ||
341 | static void set_rx_mode(struct eth_device *dev) { | |
342 | unsigned int mc_filter[2]; | |
343 | int rx_mode; | |
344 | /* !IFF_PROMISC */ | |
345 | rx_mode = AcceptBroadcast | AcceptMulticast | AcceptMyPhys; | |
346 | mc_filter[1] = mc_filter[0] = 0xffffffff; | |
347 | ||
348 | outl(rtl8139_rx_config | rx_mode, ioaddr + RxConfig); | |
349 | ||
350 | outl(mc_filter[0], ioaddr + MAR0 + 0); | |
351 | outl(mc_filter[1], ioaddr + MAR0 + 4); | |
352 | } | |
353 | ||
354 | static void rtl_reset(struct eth_device *dev) | |
355 | { | |
356 | int i; | |
357 | ||
358 | outb(CmdReset, ioaddr + ChipCmd); | |
359 | ||
360 | cur_rx = 0; | |
361 | cur_tx = 0; | |
362 | ||
363 | /* Give the chip 10ms to finish the reset. */ | |
364 | for (i=0; i<100; ++i){ | |
365 | if ((inb(ioaddr + ChipCmd) & CmdReset) == 0) break; | |
366 | udelay (100); /* wait 100us */ | |
367 | } | |
368 | ||
369 | ||
370 | for (i = 0; i < ETH_ALEN; i++) | |
371 | outb(dev->enetaddr[i], ioaddr + MAC0 + i); | |
372 | ||
373 | /* Must enable Tx/Rx before setting transfer thresholds! */ | |
374 | outb(CmdRxEnb | CmdTxEnb, ioaddr + ChipCmd); | |
375 | outl((RX_FIFO_THRESH<<13) | (RX_BUF_LEN_IDX<<11) | (RX_DMA_BURST<<8), | |
376 | ioaddr + RxConfig); /* accept no frames yet! */ | |
377 | outl((TX_DMA_BURST<<8)|0x03000000, ioaddr + TxConfig); | |
378 | ||
379 | /* The Linux driver changes Config1 here to use a different LED pattern | |
380 | * for half duplex or full/autodetect duplex (for full/autodetect, the | |
381 | * outputs are TX/RX, Link10/100, FULL, while for half duplex it uses | |
382 | * TX/RX, Link100, Link10). This is messy, because it doesn't match | |
383 | * the inscription on the mounting bracket. It should not be changed | |
384 | * from the configuration EEPROM default, because the card manufacturer | |
385 | * should have set that to match the card. */ | |
386 | ||
387 | #ifdef DEBUG_RX | |
388 | printf("rx ring address is %X\n",(unsigned long)rx_ring); | |
389 | #endif | |
96a23674 | 390 | flush_cache((unsigned long)rx_ring, RX_BUF_LEN); |
63f34912 WD |
391 | outl(phys_to_bus((int)rx_ring), ioaddr + RxBuf); |
392 | ||
393 | /* If we add multicast support, the MAR0 register would have to be | |
394 | * initialized to 0xffffffffffffffff (two 32 bit accesses). Etherboot | |
b6e4c403 | 395 | * only needs broadcast (for ARP/RARP/BOOTP/DHCP) and unicast. */ |
63f34912 WD |
396 | |
397 | outb(CmdRxEnb | CmdTxEnb, ioaddr + ChipCmd); | |
398 | ||
399 | outl(rtl8139_rx_config, ioaddr + RxConfig); | |
400 | ||
401 | /* Start the chip's Tx and Rx process. */ | |
402 | outl(0, ioaddr + RxMissed); | |
403 | ||
404 | /* set_rx_mode */ | |
405 | set_rx_mode(dev); | |
406 | ||
407 | /* Disable all known interrupts by setting the interrupt mask. */ | |
408 | outw(0, ioaddr + IntrMask); | |
409 | } | |
410 | ||
411 | static int rtl_transmit(struct eth_device *dev, volatile void *packet, int length) | |
412 | { | |
d1276c76 | 413 | unsigned int status; |
63f34912 WD |
414 | unsigned long txstatus; |
415 | unsigned int len = length; | |
d1276c76 | 416 | int i = 0; |
63f34912 WD |
417 | |
418 | ioaddr = dev->iobase; | |
419 | ||
420 | memcpy((char *)tx_buffer, (char *)packet, (int)length); | |
421 | ||
422 | #ifdef DEBUG_TX | |
423 | printf("sending %d bytes\n", len); | |
424 | #endif | |
425 | ||
426 | /* Note: RTL8139 doesn't auto-pad, send minimum payload (another 4 | |
427 | * bytes are sent automatically for the FCS, totalling to 64 bytes). */ | |
428 | while (len < ETH_ZLEN) { | |
429 | tx_buffer[len++] = '\0'; | |
430 | } | |
431 | ||
96a23674 | 432 | flush_cache((unsigned long)tx_buffer, length); |
63f34912 WD |
433 | outl(phys_to_bus((int)tx_buffer), ioaddr + TxAddr0 + cur_tx*4); |
434 | outl(((TX_FIFO_THRESH<<11) & 0x003f0000) | len, | |
435 | ioaddr + TxStatus0 + cur_tx*4); | |
436 | ||
63f34912 WD |
437 | do { |
438 | status = inw(ioaddr + IntrStatus); | |
439 | /* Only acknlowledge interrupt sources we can properly handle | |
440 | * here - the RxOverflow/RxFIFOOver MUST be handled in the | |
b6e4c403 | 441 | * rtl_poll() function. */ |
63f34912 WD |
442 | outw(status & (TxOK | TxErr | PCIErr), ioaddr + IntrStatus); |
443 | if ((status & (TxOK | TxErr | PCIErr)) != 0) break; | |
d1276c76 SK |
444 | udelay(10); |
445 | } while (i++ < RTL_TIMEOUT); | |
63f34912 WD |
446 | |
447 | txstatus = inl(ioaddr + TxStatus0 + cur_tx*4); | |
448 | ||
449 | if (status & TxOK) { | |
450 | cur_tx = (cur_tx + 1) % NUM_TX_DESC; | |
451 | #ifdef DEBUG_TX | |
452 | printf("tx done (%d ticks), status %hX txstatus %X\n", | |
453 | to-currticks(), status, txstatus); | |
454 | #endif | |
455 | return length; | |
456 | } else { | |
457 | #ifdef DEBUG_TX | |
d1276c76 SK |
458 | printf("tx timeout/error (%d usecs), status %hX txstatus %X\n", |
459 | 10*i, status, txstatus); | |
63f34912 WD |
460 | #endif |
461 | rtl_reset(dev); | |
462 | ||
463 | return 0; | |
464 | } | |
465 | } | |
466 | ||
467 | static int rtl_poll(struct eth_device *dev) | |
468 | { | |
469 | unsigned int status; | |
470 | unsigned int ring_offs; | |
471 | unsigned int rx_size, rx_status; | |
472 | int length=0; | |
473 | ||
474 | ioaddr = dev->iobase; | |
475 | ||
476 | if (inb(ioaddr + ChipCmd) & RxBufEmpty) { | |
477 | return 0; | |
478 | } | |
479 | ||
480 | status = inw(ioaddr + IntrStatus); | |
481 | /* See below for the rest of the interrupt acknowledges. */ | |
482 | outw(status & ~(RxFIFOOver | RxOverflow | RxOK), ioaddr + IntrStatus); | |
483 | ||
484 | #ifdef DEBUG_RX | |
485 | printf("rtl_poll: int %hX ", status); | |
486 | #endif | |
487 | ||
488 | ring_offs = cur_rx % RX_BUF_LEN; | |
96a23674 | 489 | /* ring_offs is guaranteed being 4-byte aligned */ |
c2f896b8 | 490 | rx_status = le32_to_cpu(*(unsigned int *)(rx_ring + ring_offs)); |
63f34912 WD |
491 | rx_size = rx_status >> 16; |
492 | rx_status &= 0xffff; | |
493 | ||
494 | if ((rx_status & (RxBadSymbol|RxRunt|RxTooLong|RxCRCErr|RxBadAlign)) || | |
495 | (rx_size < ETH_ZLEN) || (rx_size > ETH_FRAME_LEN + 4)) { | |
496 | printf("rx error %hX\n", rx_status); | |
b6e4c403 | 497 | rtl_reset(dev); /* this clears all interrupts still pending */ |
63f34912 WD |
498 | return 0; |
499 | } | |
500 | ||
501 | /* Received a good packet */ | |
502 | length = rx_size - 4; /* no one cares about the FCS */ | |
503 | if (ring_offs+4+rx_size-4 > RX_BUF_LEN) { | |
504 | int semi_count = RX_BUF_LEN - ring_offs - 4; | |
505 | unsigned char rxdata[RX_BUF_LEN]; | |
506 | ||
507 | memcpy(rxdata, rx_ring + ring_offs + 4, semi_count); | |
508 | memcpy(&(rxdata[semi_count]), rx_ring, rx_size-4-semi_count); | |
509 | ||
510 | NetReceive(rxdata, length); | |
511 | #ifdef DEBUG_RX | |
512 | printf("rx packet %d+%d bytes", semi_count,rx_size-4-semi_count); | |
513 | #endif | |
514 | } else { | |
515 | NetReceive(rx_ring + ring_offs + 4, length); | |
516 | #ifdef DEBUG_RX | |
517 | printf("rx packet %d bytes", rx_size-4); | |
518 | #endif | |
519 | } | |
96a23674 | 520 | flush_cache((unsigned long)rx_ring, RX_BUF_LEN); |
63f34912 WD |
521 | |
522 | cur_rx = (cur_rx + rx_size + 4 + 3) & ~3; | |
523 | outw(cur_rx - 16, ioaddr + RxBufPtr); | |
524 | /* See RTL8139 Programming Guide V0.1 for the official handling of | |
525 | * Rx overflow situations. The document itself contains basically no | |
526 | * usable information, except for a few exception handling rules. */ | |
527 | outw(status & (RxFIFOOver | RxOverflow | RxOK), ioaddr + IntrStatus); | |
528 | return length; | |
529 | } | |
530 | ||
531 | static void rtl_disable(struct eth_device *dev) | |
532 | { | |
533 | int i; | |
534 | ||
b6e4c403 WD |
535 | ioaddr = dev->iobase; |
536 | ||
63f34912 WD |
537 | /* reset the chip */ |
538 | outb(CmdReset, ioaddr + ChipCmd); | |
539 | ||
540 | /* Give the chip 10ms to finish the reset. */ | |
541 | for (i=0; i<100; ++i){ | |
542 | if ((inb(ioaddr + ChipCmd) & CmdReset) == 0) break; | |
543 | udelay (100); /* wait 100us */ | |
544 | } | |
545 | } |