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[deliverable/linux.git] / drivers / net / saa9730.c
1 /*
2 * Copyright (C) 2000, 2005 MIPS Technologies, Inc. All rights reserved.
3 * Authors: Carsten Langgaard <carstenl@mips.com>
4 * Maciej W. Rozycki <macro@mips.com>
5 * Copyright (C) 2004 Ralf Baechle <ralf@linux-mips.org>
6 *
7 * This program is free software; you can distribute it and/or modify it
8 * under the terms of the GNU General Public License (Version 2) as
9 * published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * for more details.
15 *
16 * You should have received a copy of the GNU General Public License along
17 * with this program; if not, write to the Free Software Foundation, Inc.,
18 * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
19 *
20 * SAA9730 ethernet driver.
21 *
22 * Changes:
23 * Angelo Dell'Aera <buffer@antifork.org> : Conversion to the new PCI API
24 * (pci_driver).
25 * Conversion to spinlocks.
26 * Error handling fixes.
27 */
28
29 #include <linux/init.h>
30 #include <linux/netdevice.h>
31 #include <linux/delay.h>
32 #include <linux/etherdevice.h>
33 #include <linux/module.h>
34 #include <linux/skbuff.h>
35 #include <linux/pci.h>
36 #include <linux/spinlock.h>
37 #include <linux/types.h>
38
39 #include <asm/addrspace.h>
40 #include <asm/io.h>
41
42 #include <asm/mips-boards/prom.h>
43
44 #include "saa9730.h"
45
46 #ifdef LAN_SAA9730_DEBUG
47 int lan_saa9730_debug = LAN_SAA9730_DEBUG;
48 #else
49 int lan_saa9730_debug;
50 #endif
51
52 #define DRV_MODULE_NAME "saa9730"
53
54 static struct pci_device_id saa9730_pci_tbl[] = {
55 { PCI_VENDOR_ID_PHILIPS, PCI_DEVICE_ID_PHILIPS_SAA9730,
56 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
57 { 0, }
58 };
59
60 MODULE_DEVICE_TABLE(pci, saa9730_pci_tbl);
61
62 /* Non-zero only if the current card is a PCI with BIOS-set IRQ. */
63 static unsigned int pci_irq_line;
64
65 static void evm_saa9730_enable_lan_int(struct lan_saa9730_private *lp)
66 {
67 writel(readl(&lp->evm_saa9730_regs->InterruptBlock1) | EVM_LAN_INT,
68 &lp->evm_saa9730_regs->InterruptBlock1);
69 writel(readl(&lp->evm_saa9730_regs->InterruptStatus1) | EVM_LAN_INT,
70 &lp->evm_saa9730_regs->InterruptStatus1);
71 writel(readl(&lp->evm_saa9730_regs->InterruptEnable1) | EVM_LAN_INT |
72 EVM_MASTER_EN, &lp->evm_saa9730_regs->InterruptEnable1);
73 }
74
75 static void evm_saa9730_disable_lan_int(struct lan_saa9730_private *lp)
76 {
77 writel(readl(&lp->evm_saa9730_regs->InterruptBlock1) & ~EVM_LAN_INT,
78 &lp->evm_saa9730_regs->InterruptBlock1);
79 writel(readl(&lp->evm_saa9730_regs->InterruptEnable1) & ~EVM_LAN_INT,
80 &lp->evm_saa9730_regs->InterruptEnable1);
81 }
82
83 static void evm_saa9730_clear_lan_int(struct lan_saa9730_private *lp)
84 {
85 writel(EVM_LAN_INT, &lp->evm_saa9730_regs->InterruptStatus1);
86 }
87
88 static void evm_saa9730_block_lan_int(struct lan_saa9730_private *lp)
89 {
90 writel(readl(&lp->evm_saa9730_regs->InterruptBlock1) & ~EVM_LAN_INT,
91 &lp->evm_saa9730_regs->InterruptBlock1);
92 }
93
94 static void evm_saa9730_unblock_lan_int(struct lan_saa9730_private *lp)
95 {
96 writel(readl(&lp->evm_saa9730_regs->InterruptBlock1) | EVM_LAN_INT,
97 &lp->evm_saa9730_regs->InterruptBlock1);
98 }
99
100 static void __attribute_used__ show_saa9730_regs(struct lan_saa9730_private *lp)
101 {
102 int i, j;
103 printk("TxmBufferA = %p\n", lp->TxmBuffer[0][0]);
104 printk("TxmBufferB = %p\n", lp->TxmBuffer[1][0]);
105 printk("RcvBufferA = %p\n", lp->RcvBuffer[0][0]);
106 printk("RcvBufferB = %p\n", lp->RcvBuffer[1][0]);
107 for (i = 0; i < LAN_SAA9730_BUFFERS; i++) {
108 for (j = 0; j < LAN_SAA9730_TXM_Q_SIZE; j++) {
109 printk("TxmBuffer[%d][%d] = %x\n", i, j,
110 le32_to_cpu(*(unsigned int *)
111 lp->TxmBuffer[i][j]));
112 }
113 }
114 for (i = 0; i < LAN_SAA9730_BUFFERS; i++) {
115 for (j = 0; j < LAN_SAA9730_RCV_Q_SIZE; j++) {
116 printk("RcvBuffer[%d][%d] = %x\n", i, j,
117 le32_to_cpu(*(unsigned int *)
118 lp->RcvBuffer[i][j]));
119 }
120 }
121 printk("lp->evm_saa9730_regs->InterruptBlock1 = %x\n",
122 readl(&lp->evm_saa9730_regs->InterruptBlock1));
123 printk("lp->evm_saa9730_regs->InterruptStatus1 = %x\n",
124 readl(&lp->evm_saa9730_regs->InterruptStatus1));
125 printk("lp->evm_saa9730_regs->InterruptEnable1 = %x\n",
126 readl(&lp->evm_saa9730_regs->InterruptEnable1));
127 printk("lp->lan_saa9730_regs->Ok2Use = %x\n",
128 readl(&lp->lan_saa9730_regs->Ok2Use));
129 printk("lp->NextTxmBufferIndex = %x\n", lp->NextTxmBufferIndex);
130 printk("lp->NextTxmPacketIndex = %x\n", lp->NextTxmPacketIndex);
131 printk("lp->PendingTxmBufferIndex = %x\n",
132 lp->PendingTxmBufferIndex);
133 printk("lp->PendingTxmPacketIndex = %x\n",
134 lp->PendingTxmPacketIndex);
135 printk("lp->lan_saa9730_regs->LanDmaCtl = %x\n",
136 readl(&lp->lan_saa9730_regs->LanDmaCtl));
137 printk("lp->lan_saa9730_regs->DmaStatus = %x\n",
138 readl(&lp->lan_saa9730_regs->DmaStatus));
139 printk("lp->lan_saa9730_regs->CamCtl = %x\n",
140 readl(&lp->lan_saa9730_regs->CamCtl));
141 printk("lp->lan_saa9730_regs->TxCtl = %x\n",
142 readl(&lp->lan_saa9730_regs->TxCtl));
143 printk("lp->lan_saa9730_regs->TxStatus = %x\n",
144 readl(&lp->lan_saa9730_regs->TxStatus));
145 printk("lp->lan_saa9730_regs->RxCtl = %x\n",
146 readl(&lp->lan_saa9730_regs->RxCtl));
147 printk("lp->lan_saa9730_regs->RxStatus = %x\n",
148 readl(&lp->lan_saa9730_regs->RxStatus));
149 for (i = 0; i < LAN_SAA9730_CAM_DWORDS; i++) {
150 writel(i, &lp->lan_saa9730_regs->CamAddress);
151 printk("lp->lan_saa9730_regs->CamData = %x\n",
152 readl(&lp->lan_saa9730_regs->CamData));
153 }
154 printk("lp->stats.tx_packets = %lx\n", lp->stats.tx_packets);
155 printk("lp->stats.tx_errors = %lx\n", lp->stats.tx_errors);
156 printk("lp->stats.tx_aborted_errors = %lx\n",
157 lp->stats.tx_aborted_errors);
158 printk("lp->stats.tx_window_errors = %lx\n",
159 lp->stats.tx_window_errors);
160 printk("lp->stats.tx_carrier_errors = %lx\n",
161 lp->stats.tx_carrier_errors);
162 printk("lp->stats.tx_fifo_errors = %lx\n",
163 lp->stats.tx_fifo_errors);
164 printk("lp->stats.tx_heartbeat_errors = %lx\n",
165 lp->stats.tx_heartbeat_errors);
166 printk("lp->stats.collisions = %lx\n", lp->stats.collisions);
167
168 printk("lp->stats.rx_packets = %lx\n", lp->stats.rx_packets);
169 printk("lp->stats.rx_errors = %lx\n", lp->stats.rx_errors);
170 printk("lp->stats.rx_dropped = %lx\n", lp->stats.rx_dropped);
171 printk("lp->stats.rx_crc_errors = %lx\n", lp->stats.rx_crc_errors);
172 printk("lp->stats.rx_frame_errors = %lx\n",
173 lp->stats.rx_frame_errors);
174 printk("lp->stats.rx_fifo_errors = %lx\n",
175 lp->stats.rx_fifo_errors);
176 printk("lp->stats.rx_length_errors = %lx\n",
177 lp->stats.rx_length_errors);
178
179 printk("lp->lan_saa9730_regs->DebugPCIMasterAddr = %x\n",
180 readl(&lp->lan_saa9730_regs->DebugPCIMasterAddr));
181 printk("lp->lan_saa9730_regs->DebugLanTxStateMachine = %x\n",
182 readl(&lp->lan_saa9730_regs->DebugLanTxStateMachine));
183 printk("lp->lan_saa9730_regs->DebugLanRxStateMachine = %x\n",
184 readl(&lp->lan_saa9730_regs->DebugLanRxStateMachine));
185 printk("lp->lan_saa9730_regs->DebugLanTxFifoPointers = %x\n",
186 readl(&lp->lan_saa9730_regs->DebugLanTxFifoPointers));
187 printk("lp->lan_saa9730_regs->DebugLanRxFifoPointers = %x\n",
188 readl(&lp->lan_saa9730_regs->DebugLanRxFifoPointers));
189 printk("lp->lan_saa9730_regs->DebugLanCtlStateMachine = %x\n",
190 readl(&lp->lan_saa9730_regs->DebugLanCtlStateMachine));
191 }
192
193 static void lan_saa9730_buffer_init(struct lan_saa9730_private *lp)
194 {
195 int i, j;
196
197 /* Init RX buffers */
198 for (i = 0; i < LAN_SAA9730_BUFFERS; i++) {
199 for (j = 0; j < LAN_SAA9730_RCV_Q_SIZE; j++) {
200 *(unsigned int *) lp->RcvBuffer[i][j] =
201 cpu_to_le32(RXSF_READY <<
202 RX_STAT_CTL_OWNER_SHF);
203 }
204 }
205
206 /* Init TX buffers */
207 for (i = 0; i < LAN_SAA9730_BUFFERS; i++) {
208 for (j = 0; j < LAN_SAA9730_TXM_Q_SIZE; j++) {
209 *(unsigned int *) lp->TxmBuffer[i][j] =
210 cpu_to_le32(TXSF_EMPTY <<
211 TX_STAT_CTL_OWNER_SHF);
212 }
213 }
214 }
215
216 static void lan_saa9730_free_buffers(struct pci_dev *pdev,
217 struct lan_saa9730_private *lp)
218 {
219 pci_free_consistent(pdev, lp->buffer_size, lp->buffer_start,
220 lp->dma_addr);
221 }
222
223 static int lan_saa9730_allocate_buffers(struct pci_dev *pdev,
224 struct lan_saa9730_private *lp)
225 {
226 void *Pa;
227 unsigned int i, j, rxoffset, txoffset;
228 int ret;
229
230 /* Initialize buffer space */
231 lp->DmaRcvPackets = LAN_SAA9730_RCV_Q_SIZE;
232 lp->DmaTxmPackets = LAN_SAA9730_TXM_Q_SIZE;
233
234 /* Initialize Rx Buffer Index */
235 lp->NextRcvPacketIndex = 0;
236 lp->NextRcvBufferIndex = 0;
237
238 /* Set current buffer index & next available packet index */
239 lp->NextTxmPacketIndex = 0;
240 lp->NextTxmBufferIndex = 0;
241 lp->PendingTxmPacketIndex = 0;
242 lp->PendingTxmBufferIndex = 0;
243
244 /*
245 * Allocate all RX and TX packets in one chunk.
246 * The Rx and Tx packets must be PACKET_SIZE aligned.
247 */
248 lp->buffer_size = ((LAN_SAA9730_RCV_Q_SIZE + LAN_SAA9730_TXM_Q_SIZE) *
249 LAN_SAA9730_PACKET_SIZE * LAN_SAA9730_BUFFERS) +
250 LAN_SAA9730_PACKET_SIZE;
251 lp->buffer_start = pci_alloc_consistent(pdev, lp->buffer_size,
252 &lp->dma_addr);
253 if (!lp->buffer_start) {
254 ret = -ENOMEM;
255 goto out;
256 }
257
258 Pa = (void *)ALIGN((unsigned long)lp->buffer_start,
259 LAN_SAA9730_PACKET_SIZE);
260
261 rxoffset = Pa - lp->buffer_start;
262
263 /* Init RX buffers */
264 for (i = 0; i < LAN_SAA9730_BUFFERS; i++) {
265 for (j = 0; j < LAN_SAA9730_RCV_Q_SIZE; j++) {
266 *(unsigned int *) Pa =
267 cpu_to_le32(RXSF_READY <<
268 RX_STAT_CTL_OWNER_SHF);
269 lp->RcvBuffer[i][j] = Pa;
270 Pa += LAN_SAA9730_PACKET_SIZE;
271 }
272 }
273
274 txoffset = Pa - lp->buffer_start;
275
276 /* Init TX buffers */
277 for (i = 0; i < LAN_SAA9730_BUFFERS; i++) {
278 for (j = 0; j < LAN_SAA9730_TXM_Q_SIZE; j++) {
279 *(unsigned int *) Pa =
280 cpu_to_le32(TXSF_EMPTY <<
281 TX_STAT_CTL_OWNER_SHF);
282 lp->TxmBuffer[i][j] = Pa;
283 Pa += LAN_SAA9730_PACKET_SIZE;
284 }
285 }
286
287 /*
288 * Set rx buffer A and rx buffer B to point to the first two buffer
289 * spaces.
290 */
291 writel(lp->dma_addr + rxoffset, &lp->lan_saa9730_regs->RxBuffA);
292 writel(lp->dma_addr + rxoffset +
293 LAN_SAA9730_PACKET_SIZE * LAN_SAA9730_RCV_Q_SIZE,
294 &lp->lan_saa9730_regs->RxBuffB);
295
296 /*
297 * Set txm_buf_a and txm_buf_b to point to the first two buffer
298 * space
299 */
300 writel(lp->dma_addr + txoffset,
301 &lp->lan_saa9730_regs->TxBuffA);
302 writel(lp->dma_addr + txoffset +
303 LAN_SAA9730_PACKET_SIZE * LAN_SAA9730_TXM_Q_SIZE,
304 &lp->lan_saa9730_regs->TxBuffB);
305
306 /* Set packet number */
307 writel((lp->DmaRcvPackets << PK_COUNT_RX_A_SHF) |
308 (lp->DmaRcvPackets << PK_COUNT_RX_B_SHF) |
309 (lp->DmaTxmPackets << PK_COUNT_TX_A_SHF) |
310 (lp->DmaTxmPackets << PK_COUNT_TX_B_SHF),
311 &lp->lan_saa9730_regs->PacketCount);
312
313 return 0;
314
315 out:
316 return ret;
317 }
318
319 static int lan_saa9730_cam_load(struct lan_saa9730_private *lp)
320 {
321 unsigned int i;
322 unsigned char *NetworkAddress;
323
324 NetworkAddress = (unsigned char *) &lp->PhysicalAddress[0][0];
325
326 for (i = 0; i < LAN_SAA9730_CAM_DWORDS; i++) {
327 /* First set address to where data is written */
328 writel(i, &lp->lan_saa9730_regs->CamAddress);
329 writel((NetworkAddress[0] << 24) | (NetworkAddress[1] << 16) |
330 (NetworkAddress[2] << 8) | NetworkAddress[3],
331 &lp->lan_saa9730_regs->CamData);
332 NetworkAddress += 4;
333 }
334 return 0;
335 }
336
337 static int lan_saa9730_cam_init(struct net_device *dev)
338 {
339 struct lan_saa9730_private *lp = netdev_priv(dev);
340 unsigned int i;
341
342 /* Copy MAC-address into all entries. */
343 for (i = 0; i < LAN_SAA9730_CAM_ENTRIES; i++) {
344 memcpy((unsigned char *) lp->PhysicalAddress[i],
345 (unsigned char *) dev->dev_addr, 6);
346 }
347
348 return 0;
349 }
350
351 static int lan_saa9730_mii_init(struct lan_saa9730_private *lp)
352 {
353 int i, l;
354
355 /* Check link status, spin here till station is not busy. */
356 i = 0;
357 while (readl(&lp->lan_saa9730_regs->StationMgmtCtl) & MD_CA_BUSY) {
358 i++;
359 if (i > 100) {
360 printk("Error: lan_saa9730_mii_init: timeout\n");
361 return -1;
362 }
363 mdelay(1); /* wait 1 ms. */
364 }
365
366 /* Now set the control and address register. */
367 writel(MD_CA_BUSY | PHY_STATUS | PHY_ADDRESS << MD_CA_PHY_SHF,
368 &lp->lan_saa9730_regs->StationMgmtCtl);
369
370 /* check link status, spin here till station is not busy */
371 i = 0;
372 while (readl(&lp->lan_saa9730_regs->StationMgmtCtl) & MD_CA_BUSY) {
373 i++;
374 if (i > 100) {
375 printk("Error: lan_saa9730_mii_init: timeout\n");
376 return -1;
377 }
378 mdelay(1); /* wait 1 ms. */
379 }
380
381 /* Wait for 1 ms. */
382 mdelay(1);
383
384 /* Check the link status. */
385 if (readl(&lp->lan_saa9730_regs->StationMgmtData) &
386 PHY_STATUS_LINK_UP) {
387 /* Link is up. */
388 return 0;
389 } else {
390 /* Link is down, reset the PHY first. */
391
392 /* set PHY address = 'CONTROL' */
393 writel(PHY_ADDRESS << MD_CA_PHY_SHF | MD_CA_WR | PHY_CONTROL,
394 &lp->lan_saa9730_regs->StationMgmtCtl);
395
396 /* Wait for 1 ms. */
397 mdelay(1);
398
399 /* set 'CONTROL' = force reset and renegotiate */
400 writel(PHY_CONTROL_RESET | PHY_CONTROL_AUTO_NEG |
401 PHY_CONTROL_RESTART_AUTO_NEG,
402 &lp->lan_saa9730_regs->StationMgmtData);
403
404 /* Wait for 50 ms. */
405 mdelay(50);
406
407 /* set 'BUSY' to start operation */
408 writel(MD_CA_BUSY | PHY_ADDRESS << MD_CA_PHY_SHF | MD_CA_WR |
409 PHY_CONTROL, &lp->lan_saa9730_regs->StationMgmtCtl);
410
411 /* await completion */
412 i = 0;
413 while (readl(&lp->lan_saa9730_regs->StationMgmtCtl) &
414 MD_CA_BUSY) {
415 i++;
416 if (i > 100) {
417 printk
418 ("Error: lan_saa9730_mii_init: timeout\n");
419 return -1;
420 }
421 mdelay(1); /* wait 1 ms. */
422 }
423
424 /* Wait for 1 ms. */
425 mdelay(1);
426
427 for (l = 0; l < 2; l++) {
428 /* set PHY address = 'STATUS' */
429 writel(MD_CA_BUSY | PHY_ADDRESS << MD_CA_PHY_SHF |
430 PHY_STATUS,
431 &lp->lan_saa9730_regs->StationMgmtCtl);
432
433 /* await completion */
434 i = 0;
435 while (readl(&lp->lan_saa9730_regs->StationMgmtCtl) &
436 MD_CA_BUSY) {
437 i++;
438 if (i > 100) {
439 printk
440 ("Error: lan_saa9730_mii_init: timeout\n");
441 return -1;
442 }
443 mdelay(1); /* wait 1 ms. */
444 }
445
446 /* wait for 3 sec. */
447 mdelay(3000);
448
449 /* check the link status */
450 if (readl(&lp->lan_saa9730_regs->StationMgmtData) &
451 PHY_STATUS_LINK_UP) {
452 /* link is up */
453 break;
454 }
455 }
456 }
457
458 return 0;
459 }
460
461 static int lan_saa9730_control_init(struct lan_saa9730_private *lp)
462 {
463 /* Initialize DMA control register. */
464 writel((LANMB_ANY << DMA_CTL_MAX_XFER_SHF) |
465 (LANEND_LITTLE << DMA_CTL_ENDIAN_SHF) |
466 (LAN_SAA9730_RCV_Q_INT_THRESHOLD << DMA_CTL_RX_INT_COUNT_SHF)
467 | DMA_CTL_RX_INT_TO_EN | DMA_CTL_RX_INT_EN |
468 DMA_CTL_MAC_RX_INT_EN | DMA_CTL_MAC_TX_INT_EN,
469 &lp->lan_saa9730_regs->LanDmaCtl);
470
471 /* Initial MAC control register. */
472 writel((MACCM_MII << MAC_CONTROL_CONN_SHF) | MAC_CONTROL_FULL_DUP,
473 &lp->lan_saa9730_regs->MacCtl);
474
475 /* Initialize CAM control register. */
476 writel(CAM_CONTROL_COMP_EN | CAM_CONTROL_BROAD_ACC,
477 &lp->lan_saa9730_regs->CamCtl);
478
479 /*
480 * Initialize CAM enable register, only turn on first entry, should
481 * contain own addr.
482 */
483 writel(0x0001, &lp->lan_saa9730_regs->CamEnable);
484
485 /* Initialize Tx control register */
486 writel(TX_CTL_EN_COMP, &lp->lan_saa9730_regs->TxCtl);
487
488 /* Initialize Rcv control register */
489 writel(RX_CTL_STRIP_CRC, &lp->lan_saa9730_regs->RxCtl);
490
491 /* Reset DMA engine */
492 writel(DMA_TEST_SW_RESET, &lp->lan_saa9730_regs->DmaTest);
493
494 return 0;
495 }
496
497 static int lan_saa9730_stop(struct lan_saa9730_private *lp)
498 {
499 int i;
500
501 /* Stop DMA first */
502 writel(readl(&lp->lan_saa9730_regs->LanDmaCtl) &
503 ~(DMA_CTL_EN_TX_DMA | DMA_CTL_EN_RX_DMA),
504 &lp->lan_saa9730_regs->LanDmaCtl);
505
506 /* Set the SW Reset bits in DMA and MAC control registers */
507 writel(DMA_TEST_SW_RESET, &lp->lan_saa9730_regs->DmaTest);
508 writel(readl(&lp->lan_saa9730_regs->MacCtl) | MAC_CONTROL_RESET,
509 &lp->lan_saa9730_regs->MacCtl);
510
511 /*
512 * Wait for MAC reset to have finished. The reset bit is auto cleared
513 * when the reset is done.
514 */
515 i = 0;
516 while (readl(&lp->lan_saa9730_regs->MacCtl) & MAC_CONTROL_RESET) {
517 i++;
518 if (i > 100) {
519 printk
520 ("Error: lan_sa9730_stop: MAC reset timeout\n");
521 return -1;
522 }
523 mdelay(1); /* wait 1 ms. */
524 }
525
526 return 0;
527 }
528
529 static int lan_saa9730_dma_init(struct lan_saa9730_private *lp)
530 {
531 /* Stop lan controller. */
532 lan_saa9730_stop(lp);
533
534 writel(LAN_SAA9730_DEFAULT_TIME_OUT_CNT,
535 &lp->lan_saa9730_regs->Timeout);
536
537 return 0;
538 }
539
540 static int lan_saa9730_start(struct lan_saa9730_private *lp)
541 {
542 lan_saa9730_buffer_init(lp);
543
544 /* Initialize Rx Buffer Index */
545 lp->NextRcvPacketIndex = 0;
546 lp->NextRcvBufferIndex = 0;
547
548 /* Set current buffer index & next available packet index */
549 lp->NextTxmPacketIndex = 0;
550 lp->NextTxmBufferIndex = 0;
551 lp->PendingTxmPacketIndex = 0;
552 lp->PendingTxmBufferIndex = 0;
553
554 writel(readl(&lp->lan_saa9730_regs->LanDmaCtl) | DMA_CTL_EN_TX_DMA |
555 DMA_CTL_EN_RX_DMA, &lp->lan_saa9730_regs->LanDmaCtl);
556
557 /* For Tx, turn on MAC then DMA */
558 writel(readl(&lp->lan_saa9730_regs->TxCtl) | TX_CTL_TX_EN,
559 &lp->lan_saa9730_regs->TxCtl);
560
561 /* For Rx, turn on DMA then MAC */
562 writel(readl(&lp->lan_saa9730_regs->RxCtl) | RX_CTL_RX_EN,
563 &lp->lan_saa9730_regs->RxCtl);
564
565 /* Set Ok2Use to let hardware own the buffers. */
566 writel(OK2USE_RX_A | OK2USE_RX_B, &lp->lan_saa9730_regs->Ok2Use);
567
568 return 0;
569 }
570
571 static int lan_saa9730_restart(struct lan_saa9730_private *lp)
572 {
573 lan_saa9730_stop(lp);
574 lan_saa9730_start(lp);
575
576 return 0;
577 }
578
579 static int lan_saa9730_tx(struct net_device *dev)
580 {
581 struct lan_saa9730_private *lp = netdev_priv(dev);
582 unsigned int *pPacket;
583 unsigned int tx_status;
584
585 if (lan_saa9730_debug > 5)
586 printk("lan_saa9730_tx interrupt\n");
587
588 /* Clear interrupt. */
589 writel(DMA_STATUS_MAC_TX_INT, &lp->lan_saa9730_regs->DmaStatus);
590
591 while (1) {
592 pPacket = lp->TxmBuffer[lp->PendingTxmBufferIndex]
593 [lp->PendingTxmPacketIndex];
594
595 /* Get status of first packet transmitted. */
596 tx_status = le32_to_cpu(*pPacket);
597
598 /* Check ownership. */
599 if ((tx_status & TX_STAT_CTL_OWNER_MSK) !=
600 (TXSF_HWDONE << TX_STAT_CTL_OWNER_SHF)) break;
601
602 /* Check for error. */
603 if (tx_status & TX_STAT_CTL_ERROR_MSK) {
604 if (lan_saa9730_debug > 1)
605 printk("lan_saa9730_tx: tx error = %x\n",
606 tx_status);
607
608 lp->stats.tx_errors++;
609 if (tx_status &
610 (TX_STATUS_EX_COLL << TX_STAT_CTL_STATUS_SHF))
611 lp->stats.tx_aborted_errors++;
612 if (tx_status &
613 (TX_STATUS_LATE_COLL << TX_STAT_CTL_STATUS_SHF))
614 lp->stats.tx_window_errors++;
615 if (tx_status &
616 (TX_STATUS_L_CARR << TX_STAT_CTL_STATUS_SHF))
617 lp->stats.tx_carrier_errors++;
618 if (tx_status &
619 (TX_STATUS_UNDER << TX_STAT_CTL_STATUS_SHF))
620 lp->stats.tx_fifo_errors++;
621 if (tx_status &
622 (TX_STATUS_SQ_ERR << TX_STAT_CTL_STATUS_SHF))
623 lp->stats.tx_heartbeat_errors++;
624
625 lp->stats.collisions +=
626 tx_status & TX_STATUS_TX_COLL_MSK;
627 }
628
629 /* Free buffer. */
630 *pPacket =
631 cpu_to_le32(TXSF_EMPTY << TX_STAT_CTL_OWNER_SHF);
632
633 /* Update pending index pointer. */
634 lp->PendingTxmPacketIndex++;
635 if (lp->PendingTxmPacketIndex >= LAN_SAA9730_TXM_Q_SIZE) {
636 lp->PendingTxmPacketIndex = 0;
637 lp->PendingTxmBufferIndex ^= 1;
638 }
639 }
640
641 /* The tx buffer is no longer full. */
642 netif_wake_queue(dev);
643
644 return 0;
645 }
646
647 static int lan_saa9730_rx(struct net_device *dev)
648 {
649 struct lan_saa9730_private *lp = netdev_priv(dev);
650 int len = 0;
651 struct sk_buff *skb = 0;
652 unsigned int rx_status;
653 int BufferIndex;
654 int PacketIndex;
655 unsigned int *pPacket;
656 unsigned char *pData;
657
658 if (lan_saa9730_debug > 5)
659 printk("lan_saa9730_rx interrupt\n");
660
661 /* Clear receive interrupts. */
662 writel(DMA_STATUS_MAC_RX_INT | DMA_STATUS_RX_INT |
663 DMA_STATUS_RX_TO_INT, &lp->lan_saa9730_regs->DmaStatus);
664
665 /* Address next packet */
666 BufferIndex = lp->NextRcvBufferIndex;
667 PacketIndex = lp->NextRcvPacketIndex;
668 pPacket = lp->RcvBuffer[BufferIndex][PacketIndex];
669 rx_status = le32_to_cpu(*pPacket);
670
671 /* Process each packet. */
672 while ((rx_status & RX_STAT_CTL_OWNER_MSK) ==
673 (RXSF_HWDONE << RX_STAT_CTL_OWNER_SHF)) {
674 /* Check the rx status. */
675 if (rx_status & (RX_STATUS_GOOD << RX_STAT_CTL_STATUS_SHF)) {
676 /* Received packet is good. */
677 len = (rx_status & RX_STAT_CTL_LENGTH_MSK) >>
678 RX_STAT_CTL_LENGTH_SHF;
679
680 pData = (unsigned char *) pPacket;
681 pData += 4;
682 skb = dev_alloc_skb(len + 2);
683 if (skb == 0) {
684 printk
685 ("%s: Memory squeeze, deferring packet.\n",
686 dev->name);
687 lp->stats.rx_dropped++;
688 } else {
689 lp->stats.rx_bytes += len;
690 lp->stats.rx_packets++;
691 skb_reserve(skb, 2); /* 16 byte align */
692 skb_put(skb, len); /* make room */
693 skb_copy_to_linear_data(skb,
694 (unsigned char *) pData,
695 len);
696 skb->protocol = eth_type_trans(skb, dev);
697 netif_rx(skb);
698 dev->last_rx = jiffies;
699 }
700 } else {
701 /* We got an error packet. */
702 if (lan_saa9730_debug > 2)
703 printk
704 ("lan_saa9730_rx: We got an error packet = %x\n",
705 rx_status);
706
707 lp->stats.rx_errors++;
708 if (rx_status &
709 (RX_STATUS_CRC_ERR << RX_STAT_CTL_STATUS_SHF))
710 lp->stats.rx_crc_errors++;
711 if (rx_status &
712 (RX_STATUS_ALIGN_ERR << RX_STAT_CTL_STATUS_SHF))
713 lp->stats.rx_frame_errors++;
714 if (rx_status &
715 (RX_STATUS_OVERFLOW << RX_STAT_CTL_STATUS_SHF))
716 lp->stats.rx_fifo_errors++;
717 if (rx_status &
718 (RX_STATUS_LONG_ERR << RX_STAT_CTL_STATUS_SHF))
719 lp->stats.rx_length_errors++;
720 }
721
722 /* Indicate we have processed the buffer. */
723 *pPacket = cpu_to_le32(RXSF_READY << RX_STAT_CTL_OWNER_SHF);
724
725 /* Make sure A or B is available to hardware as appropriate. */
726 writel(BufferIndex ? OK2USE_RX_B : OK2USE_RX_A,
727 &lp->lan_saa9730_regs->Ok2Use);
728
729 /* Go to next packet in sequence. */
730 lp->NextRcvPacketIndex++;
731 if (lp->NextRcvPacketIndex >= LAN_SAA9730_RCV_Q_SIZE) {
732 lp->NextRcvPacketIndex = 0;
733 lp->NextRcvBufferIndex ^= 1;
734 }
735
736 /* Address next packet */
737 BufferIndex = lp->NextRcvBufferIndex;
738 PacketIndex = lp->NextRcvPacketIndex;
739 pPacket = lp->RcvBuffer[BufferIndex][PacketIndex];
740 rx_status = le32_to_cpu(*pPacket);
741 }
742
743 return 0;
744 }
745
746 static irqreturn_t lan_saa9730_interrupt(const int irq, void *dev_id)
747 {
748 struct net_device *dev = dev_id;
749 struct lan_saa9730_private *lp = netdev_priv(dev);
750
751 if (lan_saa9730_debug > 5)
752 printk("lan_saa9730_interrupt\n");
753
754 /* Disable the EVM LAN interrupt. */
755 evm_saa9730_block_lan_int(lp);
756
757 /* Clear the EVM LAN interrupt. */
758 evm_saa9730_clear_lan_int(lp);
759
760 /* Service pending transmit interrupts. */
761 if (readl(&lp->lan_saa9730_regs->DmaStatus) & DMA_STATUS_MAC_TX_INT)
762 lan_saa9730_tx(dev);
763
764 /* Service pending receive interrupts. */
765 if (readl(&lp->lan_saa9730_regs->DmaStatus) &
766 (DMA_STATUS_MAC_RX_INT | DMA_STATUS_RX_INT |
767 DMA_STATUS_RX_TO_INT)) lan_saa9730_rx(dev);
768
769 /* Enable the EVM LAN interrupt. */
770 evm_saa9730_unblock_lan_int(lp);
771
772 return IRQ_HANDLED;
773 }
774
775 static int lan_saa9730_open(struct net_device *dev)
776 {
777 struct lan_saa9730_private *lp = netdev_priv(dev);
778
779 /* Associate IRQ with lan_saa9730_interrupt */
780 if (request_irq(dev->irq, &lan_saa9730_interrupt, 0, "SAA9730 Eth",
781 dev)) {
782 printk("lan_saa9730_open: Can't get irq %d\n", dev->irq);
783 return -EAGAIN;
784 }
785
786 /* Enable the Lan interrupt in the event manager. */
787 evm_saa9730_enable_lan_int(lp);
788
789 /* Start the LAN controller */
790 if (lan_saa9730_start(lp))
791 return -1;
792
793 netif_start_queue(dev);
794
795 return 0;
796 }
797
798 static int lan_saa9730_write(struct lan_saa9730_private *lp,
799 struct sk_buff *skb, int skblen)
800 {
801 unsigned char *pbData = skb->data;
802 unsigned int len = skblen;
803 unsigned char *pbPacketData;
804 unsigned int tx_status;
805 int BufferIndex;
806 int PacketIndex;
807
808 if (lan_saa9730_debug > 5)
809 printk("lan_saa9730_write: skb=%p\n", skb);
810
811 BufferIndex = lp->NextTxmBufferIndex;
812 PacketIndex = lp->NextTxmPacketIndex;
813
814 tx_status = le32_to_cpu(*(unsigned int *)lp->TxmBuffer[BufferIndex]
815 [PacketIndex]);
816 if ((tx_status & TX_STAT_CTL_OWNER_MSK) !=
817 (TXSF_EMPTY << TX_STAT_CTL_OWNER_SHF)) {
818 if (lan_saa9730_debug > 4)
819 printk
820 ("lan_saa9730_write: Tx buffer not available: tx_status = %x\n",
821 tx_status);
822 return -1;
823 }
824
825 lp->NextTxmPacketIndex++;
826 if (lp->NextTxmPacketIndex >= LAN_SAA9730_TXM_Q_SIZE) {
827 lp->NextTxmPacketIndex = 0;
828 lp->NextTxmBufferIndex ^= 1;
829 }
830
831 pbPacketData = lp->TxmBuffer[BufferIndex][PacketIndex];
832 pbPacketData += 4;
833
834 /* copy the bits */
835 memcpy(pbPacketData, pbData, len);
836
837 /* Set transmit status for hardware */
838 *(unsigned int *)lp->TxmBuffer[BufferIndex][PacketIndex] =
839 cpu_to_le32((TXSF_READY << TX_STAT_CTL_OWNER_SHF) |
840 (TX_STAT_CTL_INT_AFTER_TX <<
841 TX_STAT_CTL_FRAME_SHF) |
842 (len << TX_STAT_CTL_LENGTH_SHF));
843
844 /* Make sure A or B is available to hardware as appropriate. */
845 writel(BufferIndex ? OK2USE_TX_B : OK2USE_TX_A,
846 &lp->lan_saa9730_regs->Ok2Use);
847
848 return 0;
849 }
850
851 static void lan_saa9730_tx_timeout(struct net_device *dev)
852 {
853 struct lan_saa9730_private *lp = netdev_priv(dev);
854
855 /* Transmitter timeout, serious problems */
856 lp->stats.tx_errors++;
857 printk("%s: transmit timed out, reset\n", dev->name);
858 /*show_saa9730_regs(lp); */
859 lan_saa9730_restart(lp);
860
861 dev->trans_start = jiffies;
862 netif_wake_queue(dev);
863 }
864
865 static int lan_saa9730_start_xmit(struct sk_buff *skb,
866 struct net_device *dev)
867 {
868 struct lan_saa9730_private *lp = netdev_priv(dev);
869 unsigned long flags;
870 int skblen;
871 int len;
872
873 if (lan_saa9730_debug > 4)
874 printk("Send packet: skb=%p\n", skb);
875
876 skblen = skb->len;
877
878 spin_lock_irqsave(&lp->lock, flags);
879
880 len = (skblen <= ETH_ZLEN) ? ETH_ZLEN : skblen;
881
882 if (lan_saa9730_write(lp, skb, skblen)) {
883 spin_unlock_irqrestore(&lp->lock, flags);
884 printk("Error when writing packet to controller: skb=%p\n", skb);
885 netif_stop_queue(dev);
886 return -1;
887 }
888
889 lp->stats.tx_bytes += len;
890 lp->stats.tx_packets++;
891
892 dev->trans_start = jiffies;
893 netif_wake_queue(dev);
894 dev_kfree_skb(skb);
895
896 spin_unlock_irqrestore(&lp->lock, flags);
897
898 return 0;
899 }
900
901 static int lan_saa9730_close(struct net_device *dev)
902 {
903 struct lan_saa9730_private *lp = netdev_priv(dev);
904
905 if (lan_saa9730_debug > 1)
906 printk("lan_saa9730_close:\n");
907
908 netif_stop_queue(dev);
909
910 /* Disable the Lan interrupt in the event manager. */
911 evm_saa9730_disable_lan_int(lp);
912
913 /* Stop the controller */
914 if (lan_saa9730_stop(lp))
915 return -1;
916
917 free_irq(dev->irq, (void *) dev);
918
919 return 0;
920 }
921
922 static struct net_device_stats *lan_saa9730_get_stats(struct net_device
923 *dev)
924 {
925 struct lan_saa9730_private *lp = netdev_priv(dev);
926
927 return &lp->stats;
928 }
929
930 static void lan_saa9730_set_multicast(struct net_device *dev)
931 {
932 struct lan_saa9730_private *lp = netdev_priv(dev);
933
934 /* Stop the controller */
935 lan_saa9730_stop(lp);
936
937 if (dev->flags & IFF_PROMISC) {
938 /* accept all packets */
939 writel(CAM_CONTROL_COMP_EN | CAM_CONTROL_STATION_ACC |
940 CAM_CONTROL_GROUP_ACC | CAM_CONTROL_BROAD_ACC,
941 &lp->lan_saa9730_regs->CamCtl);
942 } else {
943 if (dev->flags & IFF_ALLMULTI || dev->mc_count) {
944 /* accept all multicast packets */
945 /*
946 * Will handle the multicast stuff later. -carstenl
947 */
948 writel(CAM_CONTROL_COMP_EN | CAM_CONTROL_GROUP_ACC |
949 CAM_CONTROL_BROAD_ACC,
950 &lp->lan_saa9730_regs->CamCtl);
951 }
952 }
953
954 lan_saa9730_restart(lp);
955 }
956
957
958 static void __devexit saa9730_remove_one(struct pci_dev *pdev)
959 {
960 struct net_device *dev = pci_get_drvdata(pdev);
961 struct lan_saa9730_private *lp = netdev_priv(dev);
962
963 if (dev) {
964 unregister_netdev(dev);
965 lan_saa9730_free_buffers(pdev, lp);
966 iounmap(lp->lan_saa9730_regs);
967 iounmap(lp->evm_saa9730_regs);
968 free_netdev(dev);
969 pci_release_regions(pdev);
970 pci_disable_device(pdev);
971 pci_set_drvdata(pdev, NULL);
972 }
973 }
974
975
976 static int lan_saa9730_init(struct net_device *dev, struct pci_dev *pdev,
977 unsigned long ioaddr, int irq)
978 {
979 struct lan_saa9730_private *lp = netdev_priv(dev);
980 unsigned char ethernet_addr[6];
981 int ret;
982
983 if (get_ethernet_addr(ethernet_addr)) {
984 ret = -ENODEV;
985 goto out;
986 }
987
988 memcpy(dev->dev_addr, ethernet_addr, 6);
989 dev->base_addr = ioaddr;
990 dev->irq = irq;
991
992 lp->pci_dev = pdev;
993
994 /* Set SAA9730 LAN base address. */
995 lp->lan_saa9730_regs = ioremap(ioaddr + SAA9730_LAN_REGS_ADDR,
996 SAA9730_LAN_REGS_SIZE);
997 if (!lp->lan_saa9730_regs) {
998 ret = -ENOMEM;
999 goto out;
1000 }
1001
1002 /* Set SAA9730 EVM base address. */
1003 lp->evm_saa9730_regs = ioremap(ioaddr + SAA9730_EVM_REGS_ADDR,
1004 SAA9730_EVM_REGS_SIZE);
1005 if (!lp->evm_saa9730_regs) {
1006 ret = -ENOMEM;
1007 goto out_iounmap_lan;
1008 }
1009
1010 /* Allocate LAN RX/TX frame buffer space. */
1011 if ((ret = lan_saa9730_allocate_buffers(pdev, lp)))
1012 goto out_iounmap;
1013
1014 /* Stop LAN controller. */
1015 if ((ret = lan_saa9730_stop(lp)))
1016 goto out_free_consistent;
1017
1018 /* Initialize CAM registers. */
1019 if ((ret = lan_saa9730_cam_init(dev)))
1020 goto out_free_consistent;
1021
1022 /* Initialize MII registers. */
1023 if ((ret = lan_saa9730_mii_init(lp)))
1024 goto out_free_consistent;
1025
1026 /* Initialize control registers. */
1027 if ((ret = lan_saa9730_control_init(lp)))
1028 goto out_free_consistent;
1029
1030 /* Load CAM registers. */
1031 if ((ret = lan_saa9730_cam_load(lp)))
1032 goto out_free_consistent;
1033
1034 /* Initialize DMA context registers. */
1035 if ((ret = lan_saa9730_dma_init(lp)))
1036 goto out_free_consistent;
1037
1038 spin_lock_init(&lp->lock);
1039
1040 dev->open = lan_saa9730_open;
1041 dev->hard_start_xmit = lan_saa9730_start_xmit;
1042 dev->stop = lan_saa9730_close;
1043 dev->get_stats = lan_saa9730_get_stats;
1044 dev->set_multicast_list = lan_saa9730_set_multicast;
1045 dev->tx_timeout = lan_saa9730_tx_timeout;
1046 dev->watchdog_timeo = (HZ >> 1);
1047 dev->dma = 0;
1048
1049 ret = register_netdev (dev);
1050 if (ret)
1051 goto out_free_consistent;
1052
1053 return 0;
1054
1055 out_free_consistent:
1056 lan_saa9730_free_buffers(pdev, lp);
1057 out_iounmap:
1058 iounmap(lp->evm_saa9730_regs);
1059 out_iounmap_lan:
1060 iounmap(lp->lan_saa9730_regs);
1061 out:
1062 return ret;
1063 }
1064
1065
1066 static int __devinit saa9730_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
1067 {
1068 struct net_device *dev = NULL;
1069 unsigned long pci_ioaddr;
1070 int err;
1071
1072 if (lan_saa9730_debug > 1)
1073 printk("saa9730.c: PCI bios is present, checking for devices...\n");
1074
1075 err = pci_enable_device(pdev);
1076 if (err) {
1077 printk(KERN_ERR "Cannot enable PCI device, aborting.\n");
1078 goto out;
1079 }
1080
1081 err = pci_request_regions(pdev, DRV_MODULE_NAME);
1082 if (err) {
1083 printk(KERN_ERR "Cannot obtain PCI resources, aborting.\n");
1084 goto out_disable_pdev;
1085 }
1086
1087 pci_irq_line = pdev->irq;
1088 /* LAN base address in located at BAR 1. */
1089
1090 pci_ioaddr = pci_resource_start(pdev, 1);
1091 pci_set_master(pdev);
1092
1093 printk("Found SAA9730 (PCI) at %lx, irq %d.\n",
1094 pci_ioaddr, pci_irq_line);
1095
1096 dev = alloc_etherdev(sizeof(struct lan_saa9730_private));
1097 if (!dev)
1098 goto out_disable_pdev;
1099
1100 err = lan_saa9730_init(dev, pdev, pci_ioaddr, pci_irq_line);
1101 if (err) {
1102 printk("LAN init failed");
1103 goto out_free_netdev;
1104 }
1105
1106 pci_set_drvdata(pdev, dev);
1107 SET_NETDEV_DEV(dev, &pdev->dev);
1108 return 0;
1109
1110 out_free_netdev:
1111 free_netdev(dev);
1112 out_disable_pdev:
1113 pci_disable_device(pdev);
1114 out:
1115 pci_set_drvdata(pdev, NULL);
1116 return err;
1117 }
1118
1119
1120 static struct pci_driver saa9730_driver = {
1121 .name = DRV_MODULE_NAME,
1122 .id_table = saa9730_pci_tbl,
1123 .probe = saa9730_init_one,
1124 .remove = __devexit_p(saa9730_remove_one),
1125 };
1126
1127
1128 static int __init saa9730_init(void)
1129 {
1130 return pci_register_driver(&saa9730_driver);
1131 }
1132
1133 static void __exit saa9730_cleanup(void)
1134 {
1135 pci_unregister_driver(&saa9730_driver);
1136 }
1137
1138 module_init(saa9730_init);
1139 module_exit(saa9730_cleanup);
1140
1141 MODULE_AUTHOR("Ralf Baechle <ralf@linux-mips.org>");
1142 MODULE_DESCRIPTION("Philips SAA9730 ethernet driver");
1143 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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