[PATCH] myri10ge - Fix spurious invokations of the watchdog reset handler
[pandora-kernel.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         outl(readl(&lp->evm_saa9730_regs->InterruptBlock1) | EVM_LAN_INT,
68              &lp->evm_saa9730_regs->InterruptBlock1);
69         outl(readl(&lp->evm_saa9730_regs->InterruptStatus1) | EVM_LAN_INT,
70              &lp->evm_saa9730_regs->InterruptStatus1);
71         outl(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         outl(readl(&lp->evm_saa9730_regs->InterruptBlock1) & ~EVM_LAN_INT,
78              &lp->evm_saa9730_regs->InterruptBlock1);
79         outl(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         outl(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         outl(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         outl(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                 outl(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         outl(lp->dma_addr + rxoffset,
292              &lp->lan_saa9730_regs->RxBuffA);
293         outl(lp->dma_addr + rxoffset +
294              LAN_SAA9730_PACKET_SIZE * LAN_SAA9730_RCV_Q_SIZE,
295              &lp->lan_saa9730_regs->RxBuffB);
296
297         /*
298          * Set txm_buf_a and txm_buf_b to point to the first two buffer
299          * space
300          */
301         outl(lp->dma_addr + txoffset,
302              &lp->lan_saa9730_regs->TxBuffA);
303         outl(lp->dma_addr + txoffset +
304              LAN_SAA9730_PACKET_SIZE * LAN_SAA9730_TXM_Q_SIZE,
305              &lp->lan_saa9730_regs->TxBuffB);
306
307         /* Set packet number */
308         outl((lp->DmaRcvPackets << PK_COUNT_RX_A_SHF) |
309              (lp->DmaRcvPackets << PK_COUNT_RX_B_SHF) |
310              (lp->DmaTxmPackets << PK_COUNT_TX_A_SHF) |
311              (lp->DmaTxmPackets << PK_COUNT_TX_B_SHF),
312              &lp->lan_saa9730_regs->PacketCount);
313
314         return 0;
315
316 out:
317         return ret;
318 }
319
320 static int lan_saa9730_cam_load(struct lan_saa9730_private *lp)
321 {
322         unsigned int i;
323         unsigned char *NetworkAddress;
324
325         NetworkAddress = (unsigned char *) &lp->PhysicalAddress[0][0];
326
327         for (i = 0; i < LAN_SAA9730_CAM_DWORDS; i++) {
328                 /* First set address to where data is written */
329                 outl(i, &lp->lan_saa9730_regs->CamAddress);
330                 outl((NetworkAddress[0] << 24) | (NetworkAddress[1] << 16)
331                      | (NetworkAddress[2] << 8) | NetworkAddress[3],
332                      &lp->lan_saa9730_regs->CamData);
333                 NetworkAddress += 4;
334         }
335         return 0;
336 }
337
338 static int lan_saa9730_cam_init(struct net_device *dev)
339 {
340         struct lan_saa9730_private *lp = netdev_priv(dev);
341         unsigned int i;
342
343         /* Copy MAC-address into all entries. */
344         for (i = 0; i < LAN_SAA9730_CAM_ENTRIES; i++) {
345                 memcpy((unsigned char *) lp->PhysicalAddress[i],
346                        (unsigned char *) dev->dev_addr, 6);
347         }
348
349         return 0;
350 }
351
352 static int lan_saa9730_mii_init(struct lan_saa9730_private *lp)
353 {
354         int i, l;
355
356         /* Check link status, spin here till station is not busy. */
357         i = 0;
358         while (readl(&lp->lan_saa9730_regs->StationMgmtCtl) & MD_CA_BUSY) {
359                 i++;
360                 if (i > 100) {
361                         printk("Error: lan_saa9730_mii_init: timeout\n");
362                         return -1;
363                 }
364                 mdelay(1);      /* wait 1 ms. */
365         }
366
367         /* Now set the control and address register. */
368         outl(MD_CA_BUSY | PHY_STATUS | PHY_ADDRESS << MD_CA_PHY_SHF,
369              &lp->lan_saa9730_regs->StationMgmtCtl);
370
371         /* check link status, spin here till station is not busy */
372         i = 0;
373         while (readl(&lp->lan_saa9730_regs->StationMgmtCtl) & MD_CA_BUSY) {
374                 i++;
375                 if (i > 100) {
376                         printk("Error: lan_saa9730_mii_init: timeout\n");
377                         return -1;
378                 }
379                 mdelay(1);      /* wait 1 ms. */
380         }
381
382         /* Wait for 1 ms. */
383         mdelay(1);
384
385         /* Check the link status. */
386         if (readl(&lp->lan_saa9730_regs->StationMgmtData) &
387             PHY_STATUS_LINK_UP) {
388                 /* Link is up. */
389                 return 0;
390         } else {
391                 /* Link is down, reset the PHY first. */
392
393                 /* set PHY address = 'CONTROL' */
394                 outl(PHY_ADDRESS << MD_CA_PHY_SHF | MD_CA_WR | PHY_CONTROL,
395                      &lp->lan_saa9730_regs->StationMgmtCtl);
396
397                 /* Wait for 1 ms. */
398                 mdelay(1);
399
400                 /* set 'CONTROL' = force reset and renegotiate */
401                 outl(PHY_CONTROL_RESET | PHY_CONTROL_AUTO_NEG |
402                      PHY_CONTROL_RESTART_AUTO_NEG,
403                      &lp->lan_saa9730_regs->StationMgmtData);
404
405                 /* Wait for 50 ms. */
406                 mdelay(50);
407
408                 /* set 'BUSY' to start operation */
409                 outl(MD_CA_BUSY | PHY_ADDRESS << MD_CA_PHY_SHF | MD_CA_WR |
410                      PHY_CONTROL, &lp->lan_saa9730_regs->StationMgmtCtl);
411
412                 /* await completion */
413                 i = 0;
414                 while (readl(&lp->lan_saa9730_regs->StationMgmtCtl) &
415                        MD_CA_BUSY) {
416                         i++;
417                         if (i > 100) {
418                                 printk
419                                     ("Error: lan_saa9730_mii_init: timeout\n");
420                                 return -1;
421                         }
422                         mdelay(1);      /* wait 1 ms. */
423                 }
424
425                 /* Wait for 1 ms. */
426                 mdelay(1);
427
428                 for (l = 0; l < 2; l++) {
429                         /* set PHY address = 'STATUS' */
430                         outl(MD_CA_BUSY | PHY_ADDRESS << MD_CA_PHY_SHF |
431                              PHY_STATUS,
432                              &lp->lan_saa9730_regs->StationMgmtCtl);
433
434                         /* await completion */
435                         i = 0;
436                         while (readl(&lp->lan_saa9730_regs->StationMgmtCtl) &
437                                MD_CA_BUSY) {
438                                 i++;
439                                 if (i > 100) {
440                                         printk
441                                             ("Error: lan_saa9730_mii_init: timeout\n");
442                                         return -1;
443                                 }
444                                 mdelay(1);      /* wait 1 ms. */
445                         }
446
447                         /* wait for 3 sec. */
448                         mdelay(3000);
449
450                         /* check the link status */
451                         if (readl(&lp->lan_saa9730_regs->StationMgmtData) &
452                             PHY_STATUS_LINK_UP) {
453                                 /* link is up */
454                                 break;
455                         }
456                 }
457         }
458
459         return 0;
460 }
461
462 static int lan_saa9730_control_init(struct lan_saa9730_private *lp)
463 {
464         /* Initialize DMA control register. */
465         outl((LANMB_ANY << DMA_CTL_MAX_XFER_SHF) |
466              (LANEND_LITTLE << DMA_CTL_ENDIAN_SHF) |
467              (LAN_SAA9730_RCV_Q_INT_THRESHOLD << DMA_CTL_RX_INT_COUNT_SHF)
468              | DMA_CTL_RX_INT_TO_EN | DMA_CTL_RX_INT_EN |
469              DMA_CTL_MAC_RX_INT_EN | DMA_CTL_MAC_TX_INT_EN,
470              &lp->lan_saa9730_regs->LanDmaCtl);
471
472         /* Initial MAC control register. */
473         outl((MACCM_MII << MAC_CONTROL_CONN_SHF) | MAC_CONTROL_FULL_DUP,
474              &lp->lan_saa9730_regs->MacCtl);
475
476         /* Initialize CAM control register. */
477         outl(CAM_CONTROL_COMP_EN | CAM_CONTROL_BROAD_ACC,
478              &lp->lan_saa9730_regs->CamCtl);
479
480         /*
481          * Initialize CAM enable register, only turn on first entry, should
482          * contain own addr.
483          */
484         outl(0x0001, &lp->lan_saa9730_regs->CamEnable);
485
486         /* Initialize Tx control register */
487         outl(TX_CTL_EN_COMP, &lp->lan_saa9730_regs->TxCtl);
488
489         /* Initialize Rcv control register */
490         outl(RX_CTL_STRIP_CRC, &lp->lan_saa9730_regs->RxCtl);
491
492         /* Reset DMA engine */
493         outl(DMA_TEST_SW_RESET, &lp->lan_saa9730_regs->DmaTest);
494
495         return 0;
496 }
497
498 static int lan_saa9730_stop(struct lan_saa9730_private *lp)
499 {
500         int i;
501
502         /* Stop DMA first */
503         outl(readl(&lp->lan_saa9730_regs->LanDmaCtl) &
504              ~(DMA_CTL_EN_TX_DMA | DMA_CTL_EN_RX_DMA),
505              &lp->lan_saa9730_regs->LanDmaCtl);
506
507         /* Set the SW Reset bits in DMA and MAC control registers */
508         outl(DMA_TEST_SW_RESET, &lp->lan_saa9730_regs->DmaTest);
509         outl(readl(&lp->lan_saa9730_regs->MacCtl) | MAC_CONTROL_RESET,
510              &lp->lan_saa9730_regs->MacCtl);
511
512         /*
513          * Wait for MAC reset to have finished. The reset bit is auto cleared
514          * when the reset is done.
515          */
516         i = 0;
517         while (readl(&lp->lan_saa9730_regs->MacCtl) & MAC_CONTROL_RESET) {
518                 i++;
519                 if (i > 100) {
520                         printk
521                             ("Error: lan_sa9730_stop: MAC reset timeout\n");
522                         return -1;
523                 }
524                 mdelay(1);      /* wait 1 ms. */
525         }
526
527         return 0;
528 }
529
530 static int lan_saa9730_dma_init(struct lan_saa9730_private *lp)
531 {
532         /* Stop lan controller. */
533         lan_saa9730_stop(lp);
534
535         outl(LAN_SAA9730_DEFAULT_TIME_OUT_CNT,
536              &lp->lan_saa9730_regs->Timeout);
537
538         return 0;
539 }
540
541 static int lan_saa9730_start(struct lan_saa9730_private *lp)
542 {
543         lan_saa9730_buffer_init(lp);
544
545         /* Initialize Rx Buffer Index */
546         lp->NextRcvPacketIndex = 0;
547         lp->NextRcvBufferIndex = 0;
548
549         /* Set current buffer index & next available packet index */
550         lp->NextTxmPacketIndex = 0;
551         lp->NextTxmBufferIndex = 0;
552         lp->PendingTxmPacketIndex = 0;
553         lp->PendingTxmBufferIndex = 0;
554
555         outl(readl(&lp->lan_saa9730_regs->LanDmaCtl) | DMA_CTL_EN_TX_DMA |
556              DMA_CTL_EN_RX_DMA, &lp->lan_saa9730_regs->LanDmaCtl);
557
558         /* For Tx, turn on MAC then DMA */
559         outl(readl(&lp->lan_saa9730_regs->TxCtl) | TX_CTL_TX_EN,
560              &lp->lan_saa9730_regs->TxCtl);
561
562         /* For Rx, turn on DMA then MAC */
563         outl(readl(&lp->lan_saa9730_regs->RxCtl) | RX_CTL_RX_EN,
564              &lp->lan_saa9730_regs->RxCtl);
565
566         /* Set Ok2Use to let hardware own the buffers.  */
567         outl(OK2USE_RX_A | OK2USE_RX_B, &lp->lan_saa9730_regs->Ok2Use);
568
569         return 0;
570 }
571
572 static int lan_saa9730_restart(struct lan_saa9730_private *lp)
573 {
574         lan_saa9730_stop(lp);
575         lan_saa9730_start(lp);
576
577         return 0;
578 }
579
580 static int lan_saa9730_tx(struct net_device *dev)
581 {
582         struct lan_saa9730_private *lp = netdev_priv(dev);
583         unsigned int *pPacket;
584         unsigned int tx_status;
585
586         if (lan_saa9730_debug > 5)
587                 printk("lan_saa9730_tx interrupt\n");
588
589         /* Clear interrupt. */
590         outl(DMA_STATUS_MAC_TX_INT, &lp->lan_saa9730_regs->DmaStatus);
591
592         while (1) {
593                 pPacket = lp->TxmBuffer[lp->PendingTxmBufferIndex]
594                                        [lp->PendingTxmPacketIndex];
595
596                 /* Get status of first packet transmitted. */
597                 tx_status = le32_to_cpu(*pPacket);
598
599                 /* Check ownership. */
600                 if ((tx_status & TX_STAT_CTL_OWNER_MSK) !=
601                     (TXSF_HWDONE << TX_STAT_CTL_OWNER_SHF)) break;
602
603                 /* Check for error. */
604                 if (tx_status & TX_STAT_CTL_ERROR_MSK) {
605                         if (lan_saa9730_debug > 1)
606                                 printk("lan_saa9730_tx: tx error = %x\n",
607                                        tx_status);
608
609                         lp->stats.tx_errors++;
610                         if (tx_status &
611                             (TX_STATUS_EX_COLL << TX_STAT_CTL_STATUS_SHF))
612                                 lp->stats.tx_aborted_errors++;
613                         if (tx_status &
614                             (TX_STATUS_LATE_COLL << TX_STAT_CTL_STATUS_SHF))
615                                 lp->stats.tx_window_errors++;
616                         if (tx_status &
617                             (TX_STATUS_L_CARR << TX_STAT_CTL_STATUS_SHF))
618                                 lp->stats.tx_carrier_errors++;
619                         if (tx_status &
620                             (TX_STATUS_UNDER << TX_STAT_CTL_STATUS_SHF))
621                                 lp->stats.tx_fifo_errors++;
622                         if (tx_status &
623                             (TX_STATUS_SQ_ERR << TX_STAT_CTL_STATUS_SHF))
624                                 lp->stats.tx_heartbeat_errors++;
625
626                         lp->stats.collisions +=
627                                 tx_status & TX_STATUS_TX_COLL_MSK;
628                 }
629
630                 /* Free buffer. */
631                 *pPacket =
632                     cpu_to_le32(TXSF_EMPTY << TX_STAT_CTL_OWNER_SHF);
633
634                 /* Update pending index pointer. */
635                 lp->PendingTxmPacketIndex++;
636                 if (lp->PendingTxmPacketIndex >= LAN_SAA9730_TXM_Q_SIZE) {
637                         lp->PendingTxmPacketIndex = 0;
638                         lp->PendingTxmBufferIndex ^= 1;
639                 }
640         }
641
642         /* The tx buffer is no longer full. */
643         netif_wake_queue(dev);
644
645         return 0;
646 }
647
648 static int lan_saa9730_rx(struct net_device *dev)
649 {
650         struct lan_saa9730_private *lp = netdev_priv(dev);
651         int len = 0;
652         struct sk_buff *skb = 0;
653         unsigned int rx_status;
654         int BufferIndex;
655         int PacketIndex;
656         unsigned int *pPacket;
657         unsigned char *pData;
658
659         if (lan_saa9730_debug > 5)
660                 printk("lan_saa9730_rx interrupt\n");
661
662         /* Clear receive interrupts. */
663         outl(DMA_STATUS_MAC_RX_INT | DMA_STATUS_RX_INT |
664              DMA_STATUS_RX_TO_INT, &lp->lan_saa9730_regs->DmaStatus);
665
666         /* Address next packet */
667         BufferIndex = lp->NextRcvBufferIndex;
668         PacketIndex = lp->NextRcvPacketIndex;
669         pPacket = lp->RcvBuffer[BufferIndex][PacketIndex];
670         rx_status = le32_to_cpu(*pPacket);
671
672         /* Process each packet. */
673         while ((rx_status & RX_STAT_CTL_OWNER_MSK) ==
674                (RXSF_HWDONE << RX_STAT_CTL_OWNER_SHF)) {
675                 /* Check the rx status. */
676                 if (rx_status & (RX_STATUS_GOOD << RX_STAT_CTL_STATUS_SHF)) {
677                         /* Received packet is good. */
678                         len = (rx_status & RX_STAT_CTL_LENGTH_MSK) >>
679                             RX_STAT_CTL_LENGTH_SHF;
680
681                         pData = (unsigned char *) pPacket;
682                         pData += 4;
683                         skb = dev_alloc_skb(len + 2);
684                         if (skb == 0) {
685                                 printk
686                                     ("%s: Memory squeeze, deferring packet.\n",
687                                      dev->name);
688                                 lp->stats.rx_dropped++;
689                         } else {
690                                 lp->stats.rx_bytes += len;
691                                 lp->stats.rx_packets++;
692                                 skb->dev = dev;
693                                 skb_reserve(skb, 2);    /* 16 byte align */
694                                 skb_put(skb, len);      /* make room */
695                                 eth_copy_and_sum(skb,
696                                                  (unsigned char *) pData,
697                                                  len, 0);
698                                 skb->protocol = eth_type_trans(skb, dev);
699                                 netif_rx(skb);
700                                 dev->last_rx = jiffies;
701                         }
702                 } else {
703                         /* We got an error packet. */
704                         if (lan_saa9730_debug > 2)
705                                 printk
706                                     ("lan_saa9730_rx: We got an error packet = %x\n",
707                                      rx_status);
708
709                         lp->stats.rx_errors++;
710                         if (rx_status &
711                             (RX_STATUS_CRC_ERR << RX_STAT_CTL_STATUS_SHF))
712                                 lp->stats.rx_crc_errors++;
713                         if (rx_status &
714                             (RX_STATUS_ALIGN_ERR << RX_STAT_CTL_STATUS_SHF))
715                                 lp->stats.rx_frame_errors++;
716                         if (rx_status &
717                             (RX_STATUS_OVERFLOW << RX_STAT_CTL_STATUS_SHF))
718                                 lp->stats.rx_fifo_errors++;
719                         if (rx_status &
720                             (RX_STATUS_LONG_ERR << RX_STAT_CTL_STATUS_SHF))
721                                 lp->stats.rx_length_errors++;
722                 }
723
724                 /* Indicate we have processed the buffer. */
725                 *pPacket = cpu_to_le32(RXSF_READY << RX_STAT_CTL_OWNER_SHF);
726
727                 /* Make sure A or B is available to hardware as appropriate. */
728                 outl(BufferIndex ? OK2USE_RX_B : OK2USE_RX_A,
729                      &lp->lan_saa9730_regs->Ok2Use);
730
731                 /* Go to next packet in sequence. */
732                 lp->NextRcvPacketIndex++;
733                 if (lp->NextRcvPacketIndex >= LAN_SAA9730_RCV_Q_SIZE) {
734                         lp->NextRcvPacketIndex = 0;
735                         lp->NextRcvBufferIndex ^= 1;
736                 }
737
738                 /* Address next packet */
739                 BufferIndex = lp->NextRcvBufferIndex;
740                 PacketIndex = lp->NextRcvPacketIndex;
741                 pPacket = lp->RcvBuffer[BufferIndex][PacketIndex];
742                 rx_status = le32_to_cpu(*pPacket);
743         }
744
745         return 0;
746 }
747
748 static irqreturn_t lan_saa9730_interrupt(const int irq, void *dev_id,
749                                   struct pt_regs *regs)
750 {
751         struct net_device *dev = (struct net_device *) dev_id;
752         struct lan_saa9730_private *lp = netdev_priv(dev);
753
754         if (lan_saa9730_debug > 5)
755                 printk("lan_saa9730_interrupt\n");
756
757         /* Disable the EVM LAN interrupt. */
758         evm_saa9730_block_lan_int(lp);
759
760         /* Clear the EVM LAN interrupt. */
761         evm_saa9730_clear_lan_int(lp);
762
763         /* Service pending transmit interrupts. */
764         if (readl(&lp->lan_saa9730_regs->DmaStatus) & DMA_STATUS_MAC_TX_INT)
765                 lan_saa9730_tx(dev);
766
767         /* Service pending receive interrupts. */
768         if (readl(&lp->lan_saa9730_regs->DmaStatus) &
769             (DMA_STATUS_MAC_RX_INT | DMA_STATUS_RX_INT |
770              DMA_STATUS_RX_TO_INT)) lan_saa9730_rx(dev);
771
772         /* Enable the EVM LAN interrupt. */
773         evm_saa9730_unblock_lan_int(lp);
774
775         return IRQ_HANDLED;
776 }
777
778 static int lan_saa9730_open(struct net_device *dev)
779 {
780         struct lan_saa9730_private *lp = netdev_priv(dev);
781
782         /* Associate IRQ with lan_saa9730_interrupt */
783         if (request_irq(dev->irq, &lan_saa9730_interrupt, 0, "SAA9730 Eth",
784                         dev)) {
785                 printk("lan_saa9730_open: Can't get irq %d\n", dev->irq);
786                 return -EAGAIN;
787         }
788
789         /* Enable the Lan interrupt in the event manager. */
790         evm_saa9730_enable_lan_int(lp);
791
792         /* Start the LAN controller */
793         if (lan_saa9730_start(lp))
794                 return -1;
795
796         netif_start_queue(dev);
797
798         return 0;
799 }
800
801 static int lan_saa9730_write(struct lan_saa9730_private *lp,
802                              struct sk_buff *skb, int skblen)
803 {
804         unsigned char *pbData = skb->data;
805         unsigned int len = skblen;
806         unsigned char *pbPacketData;
807         unsigned int tx_status;
808         int BufferIndex;
809         int PacketIndex;
810
811         if (lan_saa9730_debug > 5)
812                 printk("lan_saa9730_write: skb=%p\n", skb);
813
814         BufferIndex = lp->NextTxmBufferIndex;
815         PacketIndex = lp->NextTxmPacketIndex;
816
817         tx_status = le32_to_cpu(*(unsigned int *)lp->TxmBuffer[BufferIndex]
818                                                               [PacketIndex]);
819         if ((tx_status & TX_STAT_CTL_OWNER_MSK) !=
820             (TXSF_EMPTY << TX_STAT_CTL_OWNER_SHF)) {
821                 if (lan_saa9730_debug > 4)
822                         printk
823                             ("lan_saa9730_write: Tx buffer not available: tx_status = %x\n",
824                              tx_status);
825                 return -1;
826         }
827
828         lp->NextTxmPacketIndex++;
829         if (lp->NextTxmPacketIndex >= LAN_SAA9730_TXM_Q_SIZE) {
830                 lp->NextTxmPacketIndex = 0;
831                 lp->NextTxmBufferIndex ^= 1;
832         }
833
834         pbPacketData = lp->TxmBuffer[BufferIndex][PacketIndex];
835         pbPacketData += 4;
836
837         /* copy the bits */
838         memcpy(pbPacketData, pbData, len);
839
840         /* Set transmit status for hardware */
841         *(unsigned int *)lp->TxmBuffer[BufferIndex][PacketIndex] =
842                 cpu_to_le32((TXSF_READY << TX_STAT_CTL_OWNER_SHF) |
843                             (TX_STAT_CTL_INT_AFTER_TX <<
844                              TX_STAT_CTL_FRAME_SHF) |
845                             (len << TX_STAT_CTL_LENGTH_SHF));
846
847         /* Make sure A or B is available to hardware as appropriate. */
848         outl(BufferIndex ? OK2USE_TX_B : OK2USE_TX_A,
849              &lp->lan_saa9730_regs->Ok2Use);
850
851         return 0;
852 }
853
854 static void lan_saa9730_tx_timeout(struct net_device *dev)
855 {
856         struct lan_saa9730_private *lp = netdev_priv(dev);
857
858         /* Transmitter timeout, serious problems */
859         lp->stats.tx_errors++;
860         printk("%s: transmit timed out, reset\n", dev->name);
861         /*show_saa9730_regs(lp); */
862         lan_saa9730_restart(lp);
863
864         dev->trans_start = jiffies;
865         netif_wake_queue(dev);
866 }
867
868 static int lan_saa9730_start_xmit(struct sk_buff *skb,
869                                   struct net_device *dev)
870 {
871         struct lan_saa9730_private *lp = netdev_priv(dev);
872         unsigned long flags;
873         int skblen;
874         int len;
875
876         if (lan_saa9730_debug > 4)
877                 printk("Send packet: skb=%p\n", skb);
878
879         skblen = skb->len;
880
881         spin_lock_irqsave(&lp->lock, flags);
882
883         len = (skblen <= ETH_ZLEN) ? ETH_ZLEN : skblen;
884
885         if (lan_saa9730_write(lp, skb, skblen)) {
886                 spin_unlock_irqrestore(&lp->lock, flags);
887                 printk("Error when writing packet to controller: skb=%p\n", skb);
888                 netif_stop_queue(dev);
889                 return -1;
890         }
891
892         lp->stats.tx_bytes += len;
893         lp->stats.tx_packets++;
894
895         dev->trans_start = jiffies;
896         netif_wake_queue(dev);
897         dev_kfree_skb(skb);
898
899         spin_unlock_irqrestore(&lp->lock, flags);
900
901         return 0;
902 }
903
904 static int lan_saa9730_close(struct net_device *dev)
905 {
906         struct lan_saa9730_private *lp = netdev_priv(dev);
907
908         if (lan_saa9730_debug > 1)
909                 printk("lan_saa9730_close:\n");
910
911         netif_stop_queue(dev);
912
913         /* Disable the Lan interrupt in the event manager. */
914         evm_saa9730_disable_lan_int(lp);
915
916         /* Stop the controller */
917         if (lan_saa9730_stop(lp))
918                 return -1;
919
920         free_irq(dev->irq, (void *) dev);
921
922         return 0;
923 }
924
925 static struct net_device_stats *lan_saa9730_get_stats(struct net_device
926                                                       *dev)
927 {
928         struct lan_saa9730_private *lp = netdev_priv(dev);
929
930         return &lp->stats;
931 }
932
933 static void lan_saa9730_set_multicast(struct net_device *dev)
934 {
935         struct lan_saa9730_private *lp = netdev_priv(dev);
936
937         /* Stop the controller */
938         lan_saa9730_stop(lp);
939
940         if (dev->flags & IFF_PROMISC) {
941                 /* accept all packets */
942                 outl(CAM_CONTROL_COMP_EN | CAM_CONTROL_STATION_ACC |
943                      CAM_CONTROL_GROUP_ACC | CAM_CONTROL_BROAD_ACC,
944                      &lp->lan_saa9730_regs->CamCtl);
945         } else {
946                 if (dev->flags & IFF_ALLMULTI) {
947                         /* accept all multicast packets */
948                         outl(CAM_CONTROL_COMP_EN | CAM_CONTROL_GROUP_ACC |
949                              CAM_CONTROL_BROAD_ACC,
950                              &lp->lan_saa9730_regs->CamCtl);
951                 } else {
952                         /*
953                          * Will handle the multicast stuff later. -carstenl
954                          */
955                 }
956         }
957
958         lan_saa9730_restart(lp);
959 }
960
961
962 static void __devexit saa9730_remove_one(struct pci_dev *pdev)
963 {
964         struct net_device *dev = pci_get_drvdata(pdev);
965         struct lan_saa9730_private *lp = netdev_priv(dev);
966
967         if (dev) {
968                 unregister_netdev(dev);
969                 lan_saa9730_free_buffers(pdev, lp);
970                 iounmap(lp->lan_saa9730_regs);
971                 iounmap(lp->evm_saa9730_regs);
972                 free_netdev(dev);
973                 pci_release_regions(pdev);
974                 pci_disable_device(pdev);
975                 pci_set_drvdata(pdev, NULL);
976         }
977 }
978
979
980 static int lan_saa9730_init(struct net_device *dev, struct pci_dev *pdev,
981         unsigned long ioaddr, int irq)
982 {
983         struct lan_saa9730_private *lp = netdev_priv(dev);
984         unsigned char ethernet_addr[6];
985         int ret;
986
987         if (get_ethernet_addr(ethernet_addr)) {
988                 ret = -ENODEV;
989                 goto out;
990         }
991
992         memcpy(dev->dev_addr, ethernet_addr, 6);
993         dev->base_addr = ioaddr;
994         dev->irq = irq;
995
996         lp->pci_dev = pdev;
997
998         /* Set SAA9730 LAN base address. */
999         lp->lan_saa9730_regs = ioremap(ioaddr + SAA9730_LAN_REGS_ADDR,
1000                                        SAA9730_LAN_REGS_SIZE);
1001         if (!lp->lan_saa9730_regs) {
1002                 ret = -ENOMEM;
1003                 goto out;
1004         }
1005
1006         /* Set SAA9730 EVM base address. */
1007         lp->evm_saa9730_regs = ioremap(ioaddr + SAA9730_EVM_REGS_ADDR,
1008                                        SAA9730_EVM_REGS_SIZE);
1009         if (!lp->evm_saa9730_regs) {
1010                 ret = -ENOMEM;
1011                 goto out_iounmap_lan;
1012         }
1013
1014         /* Allocate LAN RX/TX frame buffer space. */
1015         if ((ret = lan_saa9730_allocate_buffers(pdev, lp)))
1016                 goto out_iounmap;
1017
1018         /* Stop LAN controller. */
1019         if ((ret = lan_saa9730_stop(lp)))
1020                 goto out_free_consistent;
1021
1022         /* Initialize CAM registers. */
1023         if ((ret = lan_saa9730_cam_init(dev)))
1024                 goto out_free_consistent;
1025
1026         /* Initialize MII registers. */
1027         if ((ret = lan_saa9730_mii_init(lp)))
1028                 goto out_free_consistent;
1029
1030         /* Initialize control registers. */
1031         if ((ret = lan_saa9730_control_init(lp)))
1032                 goto out_free_consistent;
1033
1034         /* Load CAM registers. */
1035         if ((ret = lan_saa9730_cam_load(lp)))
1036                 goto out_free_consistent;
1037
1038         /* Initialize DMA context registers. */
1039         if ((ret = lan_saa9730_dma_init(lp)))
1040                 goto out_free_consistent;
1041
1042         spin_lock_init(&lp->lock);
1043
1044         dev->open = lan_saa9730_open;
1045         dev->hard_start_xmit = lan_saa9730_start_xmit;
1046         dev->stop = lan_saa9730_close;
1047         dev->get_stats = lan_saa9730_get_stats;
1048         dev->set_multicast_list = lan_saa9730_set_multicast;
1049         dev->tx_timeout = lan_saa9730_tx_timeout;
1050         dev->watchdog_timeo = (HZ >> 1);
1051         dev->dma = 0;
1052
1053         ret = register_netdev (dev);
1054         if (ret)
1055                 goto out_free_consistent;
1056
1057         return 0;
1058
1059 out_free_consistent:
1060         lan_saa9730_free_buffers(pdev, lp);
1061 out_iounmap:
1062         iounmap(lp->evm_saa9730_regs);
1063 out_iounmap_lan:
1064         iounmap(lp->lan_saa9730_regs);
1065 out:
1066         return ret;
1067 }
1068
1069
1070 static int __devinit saa9730_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
1071 {
1072         struct net_device *dev = NULL;
1073         unsigned long pci_ioaddr;
1074         int err;
1075
1076         if (lan_saa9730_debug > 1)
1077                 printk("saa9730.c: PCI bios is present, checking for devices...\n");
1078
1079         err = pci_enable_device(pdev);
1080         if (err) {
1081                 printk(KERN_ERR "Cannot enable PCI device, aborting.\n");
1082                 goto out;
1083         }
1084
1085         err = pci_request_regions(pdev, DRV_MODULE_NAME);
1086         if (err) {
1087                 printk(KERN_ERR "Cannot obtain PCI resources, aborting.\n");
1088                 goto out_disable_pdev;
1089         }
1090
1091         pci_irq_line = pdev->irq;
1092         /* LAN base address in located at BAR 1. */
1093
1094         pci_ioaddr = pci_resource_start(pdev, 1);
1095         pci_set_master(pdev);
1096
1097         printk("Found SAA9730 (PCI) at %lx, irq %d.\n",
1098                pci_ioaddr, pci_irq_line);
1099
1100         dev = alloc_etherdev(sizeof(struct lan_saa9730_private));
1101         if (!dev)
1102                 goto out_disable_pdev;
1103
1104         err = lan_saa9730_init(dev, pdev, pci_ioaddr, pci_irq_line);
1105         if (err) {
1106                 printk("LAN init failed");
1107                 goto out_free_netdev;
1108         }
1109
1110         pci_set_drvdata(pdev, dev);
1111         SET_NETDEV_DEV(dev, &pdev->dev);
1112         return 0;
1113
1114 out_free_netdev:
1115         free_netdev(dev);
1116 out_disable_pdev:
1117         pci_disable_device(pdev);
1118 out:
1119         pci_set_drvdata(pdev, NULL);
1120         return err;
1121 }
1122
1123
1124 static struct pci_driver saa9730_driver = {
1125         .name           = DRV_MODULE_NAME,
1126         .id_table       = saa9730_pci_tbl,
1127         .probe          = saa9730_init_one,
1128         .remove         = __devexit_p(saa9730_remove_one),
1129 };
1130
1131
1132 static int __init saa9730_init(void)
1133 {
1134         return pci_module_init(&saa9730_driver);
1135 }
1136
1137 static void __exit saa9730_cleanup(void)
1138 {
1139         pci_unregister_driver(&saa9730_driver);
1140 }
1141
1142 module_init(saa9730_init);
1143 module_exit(saa9730_cleanup);
1144
1145 MODULE_AUTHOR("Ralf Baechle <ralf@linux-mips.org>");
1146 MODULE_DESCRIPTION("Philips SAA9730 ethernet driver");
1147 MODULE_LICENSE("GPL");