1 //==========================================================================
5 // Device driver for Cirrus Logic CS8900A ethernet controller
7 //==========================================================================
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40 //####BSDCOPYRIGHTBEGIN####
42 // -------------------------------------------
44 // Portions of this software may have been derived from OpenBSD or other sources,
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50 //==========================================================================
51 //#####DESCRIPTIONBEGIN####
54 // Contributors: gthomas, jskov
57 // Description: Driver for CS8900 ethernet controller
59 // Note: Platform can define CYGSEM_DEVS_ETH_CL_CS8900A_NOINTS
60 // to get a timer thread polling instead of interupt based
63 // Note: Driver will need some changes to support multiple instances
65 //####DESCRIPTIONEND####
67 //==========================================================================
69 #include <pkgconf/system.h>
71 #include <cyg/kernel/kapi.h>
73 #include <pkgconf/io_eth_drivers.h>
75 #include <cyg/infra/cyg_type.h>
76 #include <cyg/infra/cyg_ass.h>
77 #include <cyg/hal/hal_arch.h>
78 #include <cyg/hal/hal_intr.h>
79 #include <cyg/hal/hal_endian.h>
80 #include <cyg/infra/diag.h>
81 #include <cyg/hal/drv_api.h>
84 #include <cyg/io/eth/eth_drv.h>
85 #include <cyg/io/eth/netdev.h>
87 #include <cyg/io/cs8900.h>
90 #include CYGDAT_DEVS_ETH_CL_CS8900A_INL
93 // NOINTS operation only relevant when the NET package is loaded
94 #if !defined(CYGPKG_NET) || !defined(CYGPKG_KERNEL)
95 # undef CYGSEM_DEVS_ETH_CL_CS8900A_NOINTS
98 #ifdef CYGSEM_DEVS_ETH_CL_CS8900A_NOINTS
99 #define STACK_SIZE CYGNUM_HAL_STACK_SIZE_MINIMUM
100 static char cs8900a_fake_int_stack[STACK_SIZE];
101 static cyg_thread cs8900a_fake_int_thread_data;
102 static cyg_handle_t cs8900a_fake_int_thread_handle;
103 static void cs8900a_fake_int(cyg_addrword_t);
106 #ifdef CYGDBG_IO_ETH_DRIVERS_DEBUG
107 extern int cyg_io_eth_net_debug;
110 static void cs8900a_poll(struct eth_drv_sc *sc);
111 #ifdef CYGINT_IO_ETH_INT_SUPPORT_REQUIRED
112 // This ISR is called when the ethernet interrupt occurs
114 cs8900a_isr(cyg_vector_t vector, cyg_addrword_t data, HAL_SavedRegisters *regs)
116 cs8900a_priv_data_t* cpd = (cs8900a_priv_data_t *)data;
117 cyg_drv_interrupt_mask(cpd->interrupt);
118 cyg_drv_interrupt_acknowledge(cpd->interrupt);
119 return (CYG_ISR_HANDLED|CYG_ISR_CALL_DSR); // Run the DSR
123 cs8900a_dsr(cyg_vector_t vector, cyg_ucount32 count, cyg_addrword_t data)
125 // This conditioning out is necessary because of explicit calls to this
126 // DSR - which would not ever be called in the case of a polled mode
127 // usage ie. in RedBoot.
128 #ifdef CYGINT_IO_ETH_INT_SUPPORT_REQUIRED
129 cs8900a_priv_data_t* cpd = (cs8900a_priv_data_t *)data;
130 struct cyg_netdevtab_entry *ndp = (struct cyg_netdevtab_entry *)(cpd->tab);
131 struct eth_drv_sc *sc = (struct eth_drv_sc *)(ndp->device_instance);
135 // but here, it must be a *sc:
136 eth_drv_dsr( vector, count, (cyg_addrword_t)sc );
138 # ifndef CYGPKG_REDBOOT
139 # error Empty CS8900A ethernet DSR is compiled. Is this what you want?
145 // The deliver function (ex-DSR) handles the ethernet [logical] processing
147 cs8900a_deliver(struct eth_drv_sc *sc)
150 #ifdef CYGINT_IO_ETH_INT_SUPPORT_REQUIRED
152 cs8900a_priv_data_t *cpd = (cs8900a_priv_data_t *)sc->driver_private;
153 // Allow interrupts to happen again
154 cyg_drv_interrupt_unmask(cpd->interrupt);
160 cs8900a_int_vector(struct eth_drv_sc *sc)
162 cs8900a_priv_data_t *cpd = (cs8900a_priv_data_t *)sc->driver_private;
163 return (cpd->interrupt);
167 cs8900a_init(struct cyg_netdevtab_entry *tab)
169 struct eth_drv_sc *sc = (struct eth_drv_sc *)tab->device_instance;
170 cs8900a_priv_data_t *cpd = (cs8900a_priv_data_t *)sc->driver_private;
171 cyg_addrword_t base = cpd->base;
172 cyg_uint16 chip_type, chip_rev, chip_status;
174 #ifndef CS8900A_RESET_BYPASS
175 long timeout = 500000;
177 cyg_bool esa_configured = false;
181 CYGHWR_CL_CS8900A_PLF_INIT(cpd);
183 #ifdef CYGINT_IO_ETH_INT_SUPPORT_REQUIRED
184 // Initialize environment, setup interrupt handler
185 cyg_drv_interrupt_create(cpd->interrupt,
186 0, // Priority - what goes here?
187 (cyg_addrword_t)cpd, // Data item passed to interrupt handler
188 (cyg_ISR_t *)cs8900a_isr,
189 (cyg_DSR_t *)cs8900a_dsr,
190 &cpd->interrupt_handle,
191 &cpd->interrupt_object);
192 cyg_drv_interrupt_attach(cpd->interrupt_handle);
193 cyg_drv_interrupt_acknowledge(cpd->interrupt);
194 cyg_drv_interrupt_unmask(cpd->interrupt);
196 #ifdef CYGSEM_DEVS_ETH_CL_CS8900A_NOINTS
197 cyg_thread_create(1, // Priority
198 cs8900a_fake_int, // entry
199 (cyg_addrword_t)sc, // entry parameter
200 "CS8900 int", // Name
201 &cs8900a_fake_int_stack[0], // Stack
203 &cs8900a_fake_int_thread_handle, // Handle
204 &cs8900a_fake_int_thread_data // Thread data structure
206 cyg_thread_resume(cs8900a_fake_int_thread_handle); // Start it
210 // Read controller ID - the first is a dummy read, since (on some
211 // platforms) the first access to the controller seems to skip the
213 get_reg(base, PP_ChipID);
214 chip_type = get_reg(base, PP_ChipID);
215 chip_rev = get_reg(base, PP_ChipRev);
217 diag_printf("CS8900A[%p] - type: 0x%04x, rev: 0x%04x\n", base, chip_type, chip_rev);
219 if (chip_type != PP_ChipID_CL) {
221 diag_printf("CS8900 - invalid type (0x%04x), must be 0x630e\n", chip_type);
226 CYGHWR_CL_CS8900A_PLF_RESET(base);
227 #ifndef CS8900A_RESET_BYPASS
228 put_reg(base, PP_SelfCtl, PP_SelfCtl_Reset); // Reset chip
230 CYGHWR_CL_CS8900A_PLF_POST_RESET(base);
232 while ((get_reg(base, PP_SelfStat) & PP_SelfStat_InitD) == 0) {
233 if (--timeout <= 0) {
235 diag_printf("CS8900 didn't reset - abort!\n");
240 #endif /* CS8900A_RESET_BYPASS */
242 chip_status = get_reg(base, PP_SelfStat);
244 diag_printf("CS8900 - status: 0x%04x (%sEEPROM present)\n", chip_status,
245 chip_status & PP_SelfStat_EEPROM ? "" : "no ");
249 // Disable reception whilst finding the ESA
250 put_reg(base, PP_LineCTL, 0 );
251 // Find ESA - check possible sources in sequence and stop when
252 // one provides the ESA:
253 // RedBoot option (via provide_esa)
254 // Compile-time configuration
256 // <fail configuration of device>
257 if (NULL != cpd->provide_esa) {
258 esa_configured = cpd->provide_esa(cpd);
261 diag_printf("Got ESA from RedBoot option\n");
264 if (!esa_configured && cpd->hardwired_esa) {
265 // ESA is already set in cpd->esa[]
267 diag_printf("Got hardcoded ESA\n");
269 esa_configured = true;
271 if (!esa_configured && (chip_status & PP_SelfStat_EEPROM)) {
272 // Get ESA from EEPROM - via the PP_IA registers
274 for (i = 0; i < sizeof(cpd->esa); i += 2) {
275 #ifndef CYGIMP_DEVS_ETH_CL_CS8900A_DATABUS_BYTE_SWAPPED
276 esa_word = get_reg(base, PP_IA+i);
277 cpd->esa[i] = (esa_word & 0xFF);
278 cpd->esa[i+1] = (esa_word >> 8) & 0xFF;
280 esa_word = get_reg(base, PP_IA+CYG_SWAP16(i));
281 cpd->esa[i+1] = (esa_word & 0xFF);
282 cpd->esa[i] = (esa_word >> 8) & 0xFF;
286 diag_printf("Got EEPROM ESA\n");
288 esa_configured = true;
290 if (!esa_configured) {
292 diag_printf("CS8900 - no EEPROM, static ESA or RedBoot config option.\n");
297 // Tell the chip what ESA to use
298 for (i = 0; i < sizeof(cpd->esa); i += 2) {
299 #ifndef CYGIMP_DEVS_ETH_CL_CS8900A_DATABUS_BYTE_SWAPPED
300 put_reg(base, PP_IA+i, cpd->esa[i] | (cpd->esa[i+1] << 8));
302 put_reg(base, PP_IA+CYG_SWAP16(i), cpd->esa[i+1] | (cpd->esa[i] << 8));
305 // Set logical address mask
306 for (i = 0; i < 8; i += 2) {
307 #ifndef CYGIMP_DEVS_ETH_CL_CS8900A_DATABUS_BYTE_SWAPPED
308 put_reg(base, PP_LAF+i, 0xFFFF);
310 put_reg(base, PP_LAF+CYG_SWAP16(i), 0xFFFF);
314 diag_printf("ESA %02x:%02x:%02x:%02x:%02x:%02x\n",
315 cpd->esa[0], cpd->esa[1], cpd->esa[2],
316 cpd->esa[3], cpd->esa[4], cpd->esa[5]);
319 // Initialize upper level driver
320 (sc->funs->eth_drv->init)(sc, cpd->esa);
326 cs8900a_stop(struct eth_drv_sc *sc)
328 cs8900a_priv_data_t *cpd = (cs8900a_priv_data_t *)sc->driver_private;
329 cyg_addrword_t base = cpd->base;
331 put_reg(base, PP_LineCTL, 0);
334 // This function is called to "start up" the interface. It may be called
335 // multiple times, even when the hardware is already running. It will be
336 // called whenever something "hardware oriented" changes and should leave
337 // the hardware ready to send/receive packets.
339 cs8900a_start(struct eth_drv_sc *sc, cyg_uint8 *esa, int flags)
342 cs8900a_priv_data_t *cpd = (cs8900a_priv_data_t *)sc->driver_private;
343 cyg_addrword_t base = cpd->base;
345 put_reg(base, PP_BusCtl, PP_BusCtl_MemoryE); // Disable interrupts, memory mode
346 put_reg(base, PP_IntReg, PP_IntReg_IRQ0); // Only possibility
347 put_reg(base, PP_RxCFG, PP_RxCFG_RxOK | PP_RxCFG_CRC |
348 PP_RxCFG_RUNT | PP_RxCFG_EXTRA);
349 cpd->rxmode = PP_RxCTL_RxOK | PP_RxCTL_Broadcast | PP_RxCTL_IA;
350 put_reg(base, PP_RxCTL, cpd->rxmode);
351 put_reg(base, PP_TxCFG, PP_TxCFG_TxOK | PP_TxCFG_Collision |
352 PP_TxCFG_CRS | PP_TxCFG_SQE | PP_TxCFG_Late |
353 PP_TxCFG_Jabber | PP_TxCFG_16Collisions);
354 put_reg(base, PP_BufCFG, PP_BufCFG_TxRDY | PP_BufCFG_TxUE | PP_BufCFG_RxMiss |
355 PP_BufCFG_TxCol | PP_BufCFG_Miss | PP_BufCFG_SWI);
356 put_reg(base, PP_IntReg, PP_IntReg_IRQ0); // Only possibility
357 put_reg(base, PP_LineCTL, PP_LineCTL_Rx | PP_LineCTL_Tx);
358 // Clear Interrupt Status Queue before enabling interrupts
360 HAL_READ_UINT16(cpd->base+CS8900A_ISQ, stat);
361 } while (stat != 0) ;
363 put_reg(base, PP_BusCtl, PP_BusCtl_EnableIRQ);
366 // This routine is called to perform special "control" opertions
368 cs8900a_control(struct eth_drv_sc *sc, unsigned long key, void *data, int data_length)
370 cs8900a_priv_data_t *cpd = (cs8900a_priv_data_t *)sc->driver_private;
371 cyg_addrword_t base = cpd->base;
372 struct eth_drv_mc_list *mc_list = data;
373 unsigned char *esa = (unsigned char *)data;
377 case ETH_DRV_SET_MAC_ADDRESS:
379 diag_printf("CS8900A - set ESA: %02x:%02x:%02x:%02x:%02x:%02x\n",
380 esa[0], esa[1], esa[2],
381 esa[3], esa[4], esa[5] );
382 #if !defined(CYGSEM_DEVS_ETH_CL_CS8900A_WRITE_EEPROM) || !defined(CS8900A_PROGRAM_EEPROM)
383 diag_printf("*** PERMANENT EEPROM WRITE NOT ENABLED ***\n");
387 // We can write the MAC address into the interface info,
388 // and the chip registers no problem.
389 for ( i = 0; i < sizeof(cpd->esa); i++ )
390 cpd->esa[i] = esa[i];
391 for (i = 0; i < sizeof(cpd->esa); i += 2) {
392 cyg_uint16 reg = cpd->esa[i] | (cpd->esa[i+1] << 8);
393 put_reg(cpd->base, PP_IA+i, reg );
395 #if defined(CYGSEM_DEVS_ETH_CL_CS8900A_WRITE_EEPROM) && defined(CS8900A_PROGRAM_EEPROM)
396 if (CS8900A_PROGRAM_EEPROM(cpd))
400 #elif defined(CYGSEM_DEVS_ETH_CL_CS8900A_WRITE_EEPROM) && !defined(CS8900A_PROGRAM_EEPROM)
401 /* WRITE_EEPROM requested, but no PROGRAM_EEPROM provided */
403 #else /* !CYGSEM_DEVS_ETH_CL_CS8900A_WRITE_EEPROM - No need to write EEPROM */
407 #ifdef ETH_DRV_GET_MAC_ADDRESS
408 case ETH_DRV_GET_MAC_ADDRESS:
409 // Extract the MAC address that is in the chip, and tell the
411 for (i = 0; i < sizeof(cpd->esa); i += 2) {
412 unsigned short z = get_reg(cpd->base, PP_IA+i/2 );
413 esa[i] = (unsigned char)(0xff & z);
414 esa[i+1] = (unsigned char)(0xff & (z >> 8));
418 case ETH_DRV_SET_MC_LIST:
419 case ETH_DRV_SET_MC_ALL:
420 // Note: this code always accepts all multicast addresses if any
421 // are desired. It would be possible to accept a subset by adjusting
422 // the Logical Address Filter (LAF), but that would require scanning
423 // this list and building a suitable mask.
425 cpd->rxmode |= PP_RxCTL_Multicast;
427 cpd->rxmode &= ~PP_RxCTL_Multicast;
429 put_reg(base, PP_RxCTL, cpd->rxmode); // When is it safe to do this?
437 // This routine is called to see if it is possible to send another packet.
438 // It will return non-zero if a transmit is possible, zero otherwise.
440 cs8900a_can_send(struct eth_drv_sc *sc)
442 cs8900a_priv_data_t *cpd = (cs8900a_priv_data_t *)sc->driver_private;
443 cyg_addrword_t base = cpd->base;
446 stat = get_reg(base, PP_LineStat);
447 if ((stat & PP_LineStat_LinkOK) == 0) {
448 return false; // Link not connected
453 cyg_tick_count_t now = cyg_current_time();
454 if ((now - cpd->txstart) > 25) {
455 // 250ms is more than enough to transmit one frame
457 diag_printf("CS8900: Tx interrupt lost\n");
460 // Free up the buffer (with error indication)
461 (sc->funs->eth_drv->tx_done)(sc, cpd->txkey, 1);
465 return (cpd->txbusy == false);
468 // This routine is called to send data to the hardware.
470 cs8900a_send(struct eth_drv_sc *sc, struct eth_drv_sg *sg_list, int sg_len,
471 int total_len, unsigned long key)
473 cs8900a_priv_data_t *cpd = (cs8900a_priv_data_t *)sc->driver_private;
474 cyg_addrword_t base = cpd->base;
478 cyg_uint16 saved_data = 0, *sdata;
480 bool odd_byte = false;
487 cpd->txstart = cyg_current_time();
490 // Start the xmit sequence
491 #ifdef CYGIMP_DEVS_ETH_CL_CS8900A_DATABUS_BYTE_SWAPPED
492 total_len = CYG_SWAP16(total_len);
495 // The hardware indicates that there are options as to when the actual
496 // packet transmission will start wrt moving of data into the transmit
497 // buffer. However, impirical results seem to indicate that if the
498 // packet is large and transmission is allowed to start before the
499 // entire packet has been pushed into the buffer, the hardware gets
500 // confused and the packet is lost, along with a "lost" Tx interrupt.
501 // This may be a case of the copy loop below being interrupted, e.g.
502 // a system timer interrupt, and the hardware getting unhappy that
503 // not all of the data was provided before the transmission should
504 // have completed (i.e. buffer underrun).
505 // For now, the solution is to not allow this overlap.
506 //HAL_WRITE_UINT16(cpd->base+CS8900A_TxCMD, PP_TxCmd_TxStart_5)
508 // Start only when all data sent to chip
509 HAL_WRITE_UINT16(cpd->base+CS8900A_TxCMD, PP_TxCmd_TxStart_Full);
511 HAL_WRITE_UINT16(cpd->base+CS8900A_TxLEN, total_len);
512 // Wait for controller ready signal
514 stat = get_reg(base, PP_BusStat);
518 } while (!(stat & PP_BusStat_TxRDY));
521 diag_printf("if_cs8900a.c: PP_BusStat_TXRDY is not set. Cannot transmit packet\n");
524 // Put data into buffer
525 for (i = 0; i < sg_len; i++) {
526 data = (cyg_uint8 *)sg_list[i].buf;
527 len = sg_list[i].len;
530 /* Finish the last word. */
532 // This new byte must get on the bus _after_ the last saved odd byte, it therefore
533 // belongs in the MSB of the CS8900a
534 #ifdef CYGIMP_DEVS_ETH_CL_CS8900A_DATABUS_BYTE_SWAPPED
535 saved_data |= *data++;
537 saved_data |= ((cyg_uint16)*data++) << 8;
539 HAL_WRITE_UINT16(cpd->base+CS8900A_RTDATA, saved_data);
543 if (((CYG_ADDRESS)data & 0x1) == 0) {
544 /* Aligned on 16-bit boundary, so output contiguous words. */
545 sdata = (cyg_uint16 *)data;
547 // Make sure data get on the bus in Big Endian format
548 #if((CYG_BYTEORDER == CYG_MSBFIRST) && defined(CYGIMP_DEVS_ETH_CL_CS8900A_DATABUS_BYTE_SWAPPED) || \
549 (CYG_BYTEORDER == CYG_LSBFIRST) && !defined(CYGIMP_DEVS_ETH_CL_CS8900A_DATABUS_BYTE_SWAPPED ))
550 HAL_WRITE_UINT16(cpd->base+CS8900A_RTDATA, *sdata++);
552 HAL_WRITE_UINT16(cpd->base+CS8900A_RTDATA, CYG_SWAP16(*sdata++));
554 len -= sizeof(cyg_uint16);
556 data = (cyg_uint8 *)sdata;
558 /* Not 16-bit aligned, so byte copy */
560 saved_data = (cyg_uint16)*data++; // reuse saved_data
561 // Make sure data get on the bus in Big Endian format, the first byte belongs in the
562 // LSB of the CS8900A
563 #ifdef CYGIMP_DEVS_ETH_CL_CS8900A_DATABUS_BYTE_SWAPPED
564 saved_data = ((cyg_uint16)*data++) | (saved_data << 8);
566 saved_data |= ((cyg_uint16)*data++) << 8;
568 HAL_WRITE_UINT16(cpd->base+CS8900A_RTDATA, saved_data);
569 len -= sizeof(cyg_uint16);
572 /* Save last byte, if necessary. */
574 saved_data = (cyg_uint16)*data;
575 // This _last_ byte must get on the bus _first_, it therefore belongs in the LSB of
577 #ifdef CYGIMP_DEVS_ETH_CL_CS8900A_DATABUS_BYTE_SWAPPED
578 saved_data = (saved_data << 8);
585 HAL_WRITE_UINT16(cpd->base+CS8900A_RTDATA, saved_data);
589 // This function is called when a packet has been received. It's job is
590 // to prepare to unload the packet from the hardware. Once the length of
591 // the packet is known, the upper layer of the driver can be told. When
592 // the upper layer is ready to unload the packet, the internal function
593 // 'cs8900a_recv' will be called to actually fetch it from the hardware.
595 cs8900a_RxEvent(struct eth_drv_sc *sc, int stat)
597 cs8900a_priv_data_t *cpd = (cs8900a_priv_data_t *)sc->driver_private;
598 cyg_addrword_t base = cpd->base;
601 if(stat & PP_RxCFG_RxOK) {
602 // Only start reading a message if one has been received
603 HAL_READ_UINT16(base+CS8900A_RTDATA, stat);
604 HAL_READ_UINT16(base+CS8900A_RTDATA, len);
606 #ifdef CYGIMP_DEVS_ETH_CL_CS8900A_DATABUS_BYTE_SWAPPED
607 len = CYG_SWAP16(len);
610 CYG_ASSERT(len > 0, "Zero length ethernet frame received");
612 #ifdef CYGDBG_IO_ETH_DRIVERS_DEBUG
613 if (cyg_io_eth_net_debug) {
614 diag_printf("RxEvent - stat: %x, len: %d\n", stat, len);
617 (sc->funs->eth_drv->recv)(sc, len);
621 // This function is called as a result of the "eth_drv_recv()" call above.
622 // It's job is to actually fetch data for a packet from the hardware once
623 // memory buffers have been allocated for the packet. Note that the buffers
624 // may come in pieces, using a scatter-gather list. This allows for more
625 // efficient processing in the upper layers of the stack.
627 cs8900a_recv(struct eth_drv_sc *sc, struct eth_drv_sg *sg_list, int sg_len)
629 cs8900a_priv_data_t *cpd = (cs8900a_priv_data_t *)sc->driver_private;
630 cyg_addrword_t base = cpd->base;
632 cyg_uint16 *data, val;
635 for (i = 0; i < sg_len; i++) {
636 data = (cyg_uint16 *)sg_list[i].buf;
637 mlen = sg_list[i].len;
638 while (mlen >= sizeof(*data)) {
639 HAL_READ_UINT16(base+CS8900A_RTDATA, val);
641 #if((CYG_BYTEORDER == CYG_MSBFIRST) && defined(CYGIMP_DEVS_ETH_CL_CS8900A_DATABUS_BYTE_SWAPPED) || \
642 (CYG_BYTEORDER == CYG_LSBFIRST) && !defined(CYGIMP_DEVS_ETH_CL_CS8900A_DATABUS_BYTE_SWAPPED ))
645 *data++ = CYG_SWAP16(val);
648 mlen -= sizeof(*data);
651 HAL_READ_UINT16(base+CS8900A_RTDATA, val);
652 #ifndef CYGIMP_DEVS_ETH_CL_CS8900A_DATABUS_BYTE_SWAPPED
653 // last odd byte will be in the LSB
654 cval = (cyg_uint8)(val);
655 #elif(CYG_BYTEORDER == CYG_MSBFIRST)
656 // last odd byte will be in the MSB
657 cval = (cyg_uint8)(val >> 8);
660 if ((cp = (cyg_uint8 *)data) != 0) {
668 cs8900a_TxEvent(struct eth_drv_sc *sc, int stat)
670 cs8900a_priv_data_t *cpd = (cs8900a_priv_data_t *)sc->driver_private;
671 cyg_addrword_t base = cpd->base;
673 stat = get_reg(base, PP_TER);
674 #ifdef CYGDBG_IO_ETH_DRIVERS_DEBUG
675 if (cyg_io_eth_net_debug) {
676 diag_printf("Tx event: %x\n", stat);
680 (sc->funs->eth_drv->tx_done)(sc, cpd->txkey, 0);
684 cs8900a_BufEvent(struct eth_drv_sc *sc, int stat)
686 if (stat & PP_BufCFG_RxMiss) {
688 if (stat & PP_BufCFG_TxUE) {
693 cs8900a_poll(struct eth_drv_sc *sc)
696 cs8900a_priv_data_t *cpd = (cs8900a_priv_data_t *)sc->driver_private;
697 cyg_addrword_t base = cpd->base;
698 volatile int timeout=5000;
700 HAL_READ_UINT16(base+CS8900A_ISQ, event);
702 switch (event & ISQ_EventMask) {
704 cs8900a_RxEvent(sc, event);
707 cs8900a_TxEvent(sc, event);
710 cs8900a_BufEvent(sc, event);
712 case ISQ_RxMissEvent:
713 // Receive miss counter has overflowed
716 // Transmit collision counter has overflowed
720 diag_printf("%s: Unknown event: %x\n", __FUNCTION__, event);
726 HAL_READ_UINT16(base+CS8900A_ISQ, event);
729 CYGHWR_CL_CS8900A_PLF_INT_CLEAR(cpd);
732 #ifdef CYGSEM_DEVS_ETH_CL_CS8900A_NOINTS
734 cs8900a_fake_int(cyg_addrword_t param)
736 struct eth_drv_sc *sc = (struct eth_drv_sc *) param;
740 diag_printf("cs8900a_fake_int()\n");