1 /*
2 * Copyright (C) 2002 Intersil Americas Inc.
3 * Copyright (C) 2003 Herbert Valerio Riedel <hvr@gnu.org>
4 * Copyright (C) 2003 Luis R. Rodriguez <mcgrof@ruslug.rutgers.edu>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, see <http://www.gnu.org/licenses/>.
17 *
18 */
19
20 #include <linux/hardirq.h>
21 #include <linux/module.h>
22 #include <linux/slab.h>
23
24 #include <linux/netdevice.h>
25 #include <linux/ethtool.h>
26 #include <linux/pci.h>
27 #include <linux/sched.h>
28 #include <linux/etherdevice.h>
29 #include <linux/delay.h>
30 #include <linux/if_arp.h>
31
32 #include <asm/io.h>
33
34 #include "prismcompat.h"
35 #include "isl_38xx.h"
36 #include "isl_ioctl.h"
37 #include "islpci_dev.h"
38 #include "islpci_mgt.h"
39 #include "islpci_eth.h"
40 #include "oid_mgt.h"
41
42 #define ISL3877_IMAGE_FILE "isl3877"
43 #define ISL3886_IMAGE_FILE "isl3886"
44 #define ISL3890_IMAGE_FILE "isl3890"
45 MODULE_FIRMWARE(ISL3877_IMAGE_FILE);
46 MODULE_FIRMWARE(ISL3886_IMAGE_FILE);
47 MODULE_FIRMWARE(ISL3890_IMAGE_FILE);
48
49 static int prism54_bring_down(islpci_private *);
50 static int islpci_alloc_memory(islpci_private *);
51
52 /* Temporary dummy MAC address to use until firmware is loaded.
53 * The idea there is that some tools (such as nameif) may query
54 * the MAC address before the netdev is 'open'. By using a valid
55 * OUI prefix, they can process the netdev properly.
56 * Of course, this is not the final/real MAC address. It doesn't
57 * matter, as you are suppose to be able to change it anytime via
58 * ndev->set_mac_address. Jean II */
59 static const unsigned char dummy_mac[6] = { 0x00, 0x30, 0xB4, 0x00, 0x00, 0x00 };
60
61 static int
isl_upload_firmware(islpci_private * priv)62 isl_upload_firmware(islpci_private *priv)
63 {
64 u32 reg, rc;
65 void __iomem *device_base = priv->device_base;
66
67 /* clear the RAMBoot and the Reset bit */
68 reg = readl(device_base + ISL38XX_CTRL_STAT_REG);
69 reg &= ~ISL38XX_CTRL_STAT_RESET;
70 reg &= ~ISL38XX_CTRL_STAT_RAMBOOT;
71 writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
72 wmb();
73 udelay(ISL38XX_WRITEIO_DELAY);
74
75 /* set the Reset bit without reading the register ! */
76 reg |= ISL38XX_CTRL_STAT_RESET;
77 writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
78 wmb();
79 udelay(ISL38XX_WRITEIO_DELAY);
80
81 /* clear the Reset bit */
82 reg &= ~ISL38XX_CTRL_STAT_RESET;
83 writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
84 wmb();
85
86 /* wait a while for the device to reboot */
87 mdelay(50);
88
89 {
90 const struct firmware *fw_entry = NULL;
91 long fw_len;
92 const u32 *fw_ptr;
93
94 rc = request_firmware(&fw_entry, priv->firmware, PRISM_FW_PDEV);
95 if (rc) {
96 printk(KERN_ERR
97 "%s: request_firmware() failed for '%s'\n",
98 "prism54", priv->firmware);
99 return rc;
100 }
101 /* prepare the Direct Memory Base register */
102 reg = ISL38XX_DEV_FIRMWARE_ADDRES;
103
104 fw_ptr = (u32 *) fw_entry->data;
105 fw_len = fw_entry->size;
106
107 if (fw_len % 4) {
108 printk(KERN_ERR
109 "%s: firmware '%s' size is not multiple of 32bit, aborting!\n",
110 "prism54", priv->firmware);
111 release_firmware(fw_entry);
112 return -EILSEQ; /* Illegal byte sequence */;
113 }
114
115 while (fw_len > 0) {
116 long _fw_len =
117 (fw_len >
118 ISL38XX_MEMORY_WINDOW_SIZE) ?
119 ISL38XX_MEMORY_WINDOW_SIZE : fw_len;
120 u32 __iomem *dev_fw_ptr = device_base + ISL38XX_DIRECT_MEM_WIN;
121
122 /* set the card's base address for writing the data */
123 isl38xx_w32_flush(device_base, reg,
124 ISL38XX_DIR_MEM_BASE_REG);
125 wmb(); /* be paranoid */
126
127 /* increment the write address for next iteration */
128 reg += _fw_len;
129 fw_len -= _fw_len;
130
131 /* write the data to the Direct Memory Window 32bit-wise */
132 /* memcpy_toio() doesn't guarantee 32bit writes :-| */
133 while (_fw_len > 0) {
134 /* use non-swapping writel() */
135 __raw_writel(*fw_ptr, dev_fw_ptr);
136 fw_ptr++, dev_fw_ptr++;
137 _fw_len -= 4;
138 }
139
140 /* flush PCI posting */
141 (void) readl(device_base + ISL38XX_PCI_POSTING_FLUSH);
142 wmb(); /* be paranoid again */
143
144 BUG_ON(_fw_len != 0);
145 }
146
147 BUG_ON(fw_len != 0);
148
149 /* Firmware version is at offset 40 (also for "newmac") */
150 printk(KERN_DEBUG "%s: firmware version: %.8s\n",
151 priv->ndev->name, fw_entry->data + 40);
152
153 release_firmware(fw_entry);
154 }
155
156 /* now reset the device
157 * clear the Reset & ClkRun bit, set the RAMBoot bit */
158 reg = readl(device_base + ISL38XX_CTRL_STAT_REG);
159 reg &= ~ISL38XX_CTRL_STAT_CLKRUN;
160 reg &= ~ISL38XX_CTRL_STAT_RESET;
161 reg |= ISL38XX_CTRL_STAT_RAMBOOT;
162 isl38xx_w32_flush(device_base, reg, ISL38XX_CTRL_STAT_REG);
163 wmb();
164 udelay(ISL38XX_WRITEIO_DELAY);
165
166 /* set the reset bit latches the host override and RAMBoot bits
167 * into the device for operation when the reset bit is reset */
168 reg |= ISL38XX_CTRL_STAT_RESET;
169 writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
170 /* don't do flush PCI posting here! */
171 wmb();
172 udelay(ISL38XX_WRITEIO_DELAY);
173
174 /* clear the reset bit should start the whole circus */
175 reg &= ~ISL38XX_CTRL_STAT_RESET;
176 writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
177 /* don't do flush PCI posting here! */
178 wmb();
179 udelay(ISL38XX_WRITEIO_DELAY);
180
181 return 0;
182 }
183
184 /******************************************************************************
185 Device Interrupt Handler
186 ******************************************************************************/
187
188 irqreturn_t
islpci_interrupt(int irq,void * config)189 islpci_interrupt(int irq, void *config)
190 {
191 u32 reg;
192 islpci_private *priv = config;
193 struct net_device *ndev = priv->ndev;
194 void __iomem *device = priv->device_base;
195 int powerstate = ISL38XX_PSM_POWERSAVE_STATE;
196
197 /* lock the interrupt handler */
198 spin_lock(&priv->slock);
199
200 /* received an interrupt request on a shared IRQ line
201 * first check whether the device is in sleep mode */
202 reg = readl(device + ISL38XX_CTRL_STAT_REG);
203 if (reg & ISL38XX_CTRL_STAT_SLEEPMODE)
204 /* device is in sleep mode, IRQ was generated by someone else */
205 {
206 #if VERBOSE > SHOW_ERROR_MESSAGES
207 DEBUG(SHOW_TRACING, "Assuming someone else called the IRQ\n");
208 #endif
209 spin_unlock(&priv->slock);
210 return IRQ_NONE;
211 }
212
213
214 /* check whether there is any source of interrupt on the device */
215 reg = readl(device + ISL38XX_INT_IDENT_REG);
216
217 /* also check the contents of the Interrupt Enable Register, because this
218 * will filter out interrupt sources from other devices on the same irq ! */
219 reg &= readl(device + ISL38XX_INT_EN_REG);
220 reg &= ISL38XX_INT_SOURCES;
221
222 if (reg != 0) {
223 if (islpci_get_state(priv) != PRV_STATE_SLEEP)
224 powerstate = ISL38XX_PSM_ACTIVE_STATE;
225
226 /* reset the request bits in the Identification register */
227 isl38xx_w32_flush(device, reg, ISL38XX_INT_ACK_REG);
228
229 #if VERBOSE > SHOW_ERROR_MESSAGES
230 DEBUG(SHOW_FUNCTION_CALLS,
231 "IRQ: Identification register 0x%p 0x%x\n", device, reg);
232 #endif
233
234 /* check for each bit in the register separately */
235 if (reg & ISL38XX_INT_IDENT_UPDATE) {
236 #if VERBOSE > SHOW_ERROR_MESSAGES
237 /* Queue has been updated */
238 DEBUG(SHOW_TRACING, "IRQ: Update flag\n");
239
240 DEBUG(SHOW_QUEUE_INDEXES,
241 "CB drv Qs: [%i][%i][%i][%i][%i][%i]\n",
242 le32_to_cpu(priv->control_block->
243 driver_curr_frag[0]),
244 le32_to_cpu(priv->control_block->
245 driver_curr_frag[1]),
246 le32_to_cpu(priv->control_block->
247 driver_curr_frag[2]),
248 le32_to_cpu(priv->control_block->
249 driver_curr_frag[3]),
250 le32_to_cpu(priv->control_block->
251 driver_curr_frag[4]),
252 le32_to_cpu(priv->control_block->
253 driver_curr_frag[5])
254 );
255
256 DEBUG(SHOW_QUEUE_INDEXES,
257 "CB dev Qs: [%i][%i][%i][%i][%i][%i]\n",
258 le32_to_cpu(priv->control_block->
259 device_curr_frag[0]),
260 le32_to_cpu(priv->control_block->
261 device_curr_frag[1]),
262 le32_to_cpu(priv->control_block->
263 device_curr_frag[2]),
264 le32_to_cpu(priv->control_block->
265 device_curr_frag[3]),
266 le32_to_cpu(priv->control_block->
267 device_curr_frag[4]),
268 le32_to_cpu(priv->control_block->
269 device_curr_frag[5])
270 );
271 #endif
272
273 /* cleanup the data low transmit queue */
274 islpci_eth_cleanup_transmit(priv, priv->control_block);
275
276 /* device is in active state, update the
277 * powerstate flag if necessary */
278 powerstate = ISL38XX_PSM_ACTIVE_STATE;
279
280 /* check all three queues in priority order
281 * call the PIMFOR receive function until the
282 * queue is empty */
283 if (isl38xx_in_queue(priv->control_block,
284 ISL38XX_CB_RX_MGMTQ) != 0) {
285 #if VERBOSE > SHOW_ERROR_MESSAGES
286 DEBUG(SHOW_TRACING,
287 "Received frame in Management Queue\n");
288 #endif
289 islpci_mgt_receive(ndev);
290
291 islpci_mgt_cleanup_transmit(ndev);
292
293 /* Refill slots in receive queue */
294 islpci_mgmt_rx_fill(ndev);
295
296 /* no need to trigger the device, next
297 islpci_mgt_transaction does it */
298 }
299
300 while (isl38xx_in_queue(priv->control_block,
301 ISL38XX_CB_RX_DATA_LQ) != 0) {
302 #if VERBOSE > SHOW_ERROR_MESSAGES
303 DEBUG(SHOW_TRACING,
304 "Received frame in Data Low Queue\n");
305 #endif
306 islpci_eth_receive(priv);
307 }
308
309 /* check whether the data transmit queues were full */
310 if (priv->data_low_tx_full) {
311 /* check whether the transmit is not full anymore */
312 if (ISL38XX_CB_TX_QSIZE -
313 isl38xx_in_queue(priv->control_block,
314 ISL38XX_CB_TX_DATA_LQ) >=
315 ISL38XX_MIN_QTHRESHOLD) {
316 /* nope, the driver is ready for more network frames */
317 netif_wake_queue(priv->ndev);
318
319 /* reset the full flag */
320 priv->data_low_tx_full = 0;
321 }
322 }
323 }
324
325 if (reg & ISL38XX_INT_IDENT_INIT) {
326 /* Device has been initialized */
327 #if VERBOSE > SHOW_ERROR_MESSAGES
328 DEBUG(SHOW_TRACING,
329 "IRQ: Init flag, device initialized\n");
330 #endif
331 wake_up(&priv->reset_done);
332 }
333
334 if (reg & ISL38XX_INT_IDENT_SLEEP) {
335 /* Device intends to move to powersave state */
336 #if VERBOSE > SHOW_ERROR_MESSAGES
337 DEBUG(SHOW_TRACING, "IRQ: Sleep flag\n");
338 #endif
339 isl38xx_handle_sleep_request(priv->control_block,
340 &powerstate,
341 priv->device_base);
342 }
343
344 if (reg & ISL38XX_INT_IDENT_WAKEUP) {
345 /* Device has been woken up to active state */
346 #if VERBOSE > SHOW_ERROR_MESSAGES
347 DEBUG(SHOW_TRACING, "IRQ: Wakeup flag\n");
348 #endif
349
350 isl38xx_handle_wakeup(priv->control_block,
351 &powerstate, priv->device_base);
352 }
353 } else {
354 #if VERBOSE > SHOW_ERROR_MESSAGES
355 DEBUG(SHOW_TRACING, "Assuming someone else called the IRQ\n");
356 #endif
357 spin_unlock(&priv->slock);
358 return IRQ_NONE;
359 }
360
361 /* sleep -> ready */
362 if (islpci_get_state(priv) == PRV_STATE_SLEEP
363 && powerstate == ISL38XX_PSM_ACTIVE_STATE)
364 islpci_set_state(priv, PRV_STATE_READY);
365
366 /* !sleep -> sleep */
367 if (islpci_get_state(priv) != PRV_STATE_SLEEP
368 && powerstate == ISL38XX_PSM_POWERSAVE_STATE)
369 islpci_set_state(priv, PRV_STATE_SLEEP);
370
371 /* unlock the interrupt handler */
372 spin_unlock(&priv->slock);
373
374 return IRQ_HANDLED;
375 }
376
377 /******************************************************************************
378 Network Interface Control & Statistical functions
379 ******************************************************************************/
380 static int
islpci_open(struct net_device * ndev)381 islpci_open(struct net_device *ndev)
382 {
383 u32 rc;
384 islpci_private *priv = netdev_priv(ndev);
385
386 /* reset data structures, upload firmware and reset device */
387 rc = islpci_reset(priv,1);
388 if (rc) {
389 prism54_bring_down(priv);
390 return rc; /* Returns informative message */
391 }
392
393 netif_start_queue(ndev);
394
395 /* Turn off carrier if in STA or Ad-hoc mode. It will be turned on
396 * once the firmware receives a trap of being associated
397 * (GEN_OID_LINKSTATE). In other modes (AP or WDS or monitor) we
398 * should just leave the carrier on as its expected the firmware
399 * won't send us a trigger. */
400 if (priv->iw_mode == IW_MODE_INFRA || priv->iw_mode == IW_MODE_ADHOC)
401 netif_carrier_off(ndev);
402 else
403 netif_carrier_on(ndev);
404
405 return 0;
406 }
407
408 static int
islpci_close(struct net_device * ndev)409 islpci_close(struct net_device *ndev)
410 {
411 islpci_private *priv = netdev_priv(ndev);
412
413 printk(KERN_DEBUG "%s: islpci_close ()\n", ndev->name);
414
415 netif_stop_queue(ndev);
416
417 return prism54_bring_down(priv);
418 }
419
420 static int
prism54_bring_down(islpci_private * priv)421 prism54_bring_down(islpci_private *priv)
422 {
423 void __iomem *device_base = priv->device_base;
424 u32 reg;
425 /* we are going to shutdown the device */
426 islpci_set_state(priv, PRV_STATE_PREBOOT);
427
428 /* disable all device interrupts in case they weren't */
429 isl38xx_disable_interrupts(priv->device_base);
430
431 /* For safety reasons, we may want to ensure that no DMA transfer is
432 * currently in progress by emptying the TX and RX queues. */
433
434 /* wait until interrupts have finished executing on other CPUs */
435 synchronize_irq(priv->pdev->irq);
436
437 reg = readl(device_base + ISL38XX_CTRL_STAT_REG);
438 reg &= ~(ISL38XX_CTRL_STAT_RESET | ISL38XX_CTRL_STAT_RAMBOOT);
439 writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
440 wmb();
441 udelay(ISL38XX_WRITEIO_DELAY);
442
443 reg |= ISL38XX_CTRL_STAT_RESET;
444 writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
445 wmb();
446 udelay(ISL38XX_WRITEIO_DELAY);
447
448 /* clear the Reset bit */
449 reg &= ~ISL38XX_CTRL_STAT_RESET;
450 writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
451 wmb();
452
453 /* wait a while for the device to reset */
454 schedule_timeout_uninterruptible(msecs_to_jiffies(50));
455
456 return 0;
457 }
458
459 static int
islpci_upload_fw(islpci_private * priv)460 islpci_upload_fw(islpci_private *priv)
461 {
462 islpci_state_t old_state;
463 u32 rc;
464
465 old_state = islpci_set_state(priv, PRV_STATE_BOOT);
466
467 printk(KERN_DEBUG "%s: uploading firmware...\n", priv->ndev->name);
468
469 rc = isl_upload_firmware(priv);
470 if (rc) {
471 /* error uploading the firmware */
472 printk(KERN_ERR "%s: could not upload firmware ('%s')\n",
473 priv->ndev->name, priv->firmware);
474
475 islpci_set_state(priv, old_state);
476 return rc;
477 }
478
479 printk(KERN_DEBUG "%s: firmware upload complete\n",
480 priv->ndev->name);
481
482 islpci_set_state(priv, PRV_STATE_POSTBOOT);
483
484 return 0;
485 }
486
487 static int
islpci_reset_if(islpci_private * priv)488 islpci_reset_if(islpci_private *priv)
489 {
490 long remaining;
491 int result = -ETIME;
492 int count;
493
494 DEFINE_WAIT(wait);
495 prepare_to_wait(&priv->reset_done, &wait, TASK_UNINTERRUPTIBLE);
496
497 /* now the last step is to reset the interface */
498 isl38xx_interface_reset(priv->device_base, priv->device_host_address);
499 islpci_set_state(priv, PRV_STATE_PREINIT);
500
501 for(count = 0; count < 2 && result; count++) {
502 /* The software reset acknowledge needs about 220 msec here.
503 * Be conservative and wait for up to one second. */
504
505 remaining = schedule_timeout_uninterruptible(HZ);
506
507 if(remaining > 0) {
508 result = 0;
509 break;
510 }
511
512 /* If we're here it's because our IRQ hasn't yet gone through.
513 * Retry a bit more...
514 */
515 printk(KERN_ERR "%s: no 'reset complete' IRQ seen - retrying\n",
516 priv->ndev->name);
517 }
518
519 finish_wait(&priv->reset_done, &wait);
520
521 if (result) {
522 printk(KERN_ERR "%s: interface reset failure\n", priv->ndev->name);
523 return result;
524 }
525
526 islpci_set_state(priv, PRV_STATE_INIT);
527
528 /* Now that the device is 100% up, let's allow
529 * for the other interrupts --
530 * NOTE: this is not *yet* true since we've only allowed the
531 * INIT interrupt on the IRQ line. We can perhaps poll
532 * the IRQ line until we know for sure the reset went through */
533 isl38xx_enable_common_interrupts(priv->device_base);
534
535 down_write(&priv->mib_sem);
536 result = mgt_commit(priv);
537 if (result) {
538 printk(KERN_ERR "%s: interface reset failure\n", priv->ndev->name);
539 up_write(&priv->mib_sem);
540 return result;
541 }
542 up_write(&priv->mib_sem);
543
544 islpci_set_state(priv, PRV_STATE_READY);
545
546 printk(KERN_DEBUG "%s: interface reset complete\n", priv->ndev->name);
547 return 0;
548 }
549
550 int
islpci_reset(islpci_private * priv,int reload_firmware)551 islpci_reset(islpci_private *priv, int reload_firmware)
552 {
553 isl38xx_control_block *cb = /* volatile not needed */
554 (isl38xx_control_block *) priv->control_block;
555 unsigned counter;
556 int rc;
557
558 if (reload_firmware)
559 islpci_set_state(priv, PRV_STATE_PREBOOT);
560 else
561 islpci_set_state(priv, PRV_STATE_POSTBOOT);
562
563 printk(KERN_DEBUG "%s: resetting device...\n", priv->ndev->name);
564
565 /* disable all device interrupts in case they weren't */
566 isl38xx_disable_interrupts(priv->device_base);
567
568 /* flush all management queues */
569 priv->index_mgmt_tx = 0;
570 priv->index_mgmt_rx = 0;
571
572 /* clear the indexes in the frame pointer */
573 for (counter = 0; counter < ISL38XX_CB_QCOUNT; counter++) {
574 cb->driver_curr_frag[counter] = cpu_to_le32(0);
575 cb->device_curr_frag[counter] = cpu_to_le32(0);
576 }
577
578 /* reset the mgmt receive queue */
579 for (counter = 0; counter < ISL38XX_CB_MGMT_QSIZE; counter++) {
580 isl38xx_fragment *frag = &cb->rx_data_mgmt[counter];
581 frag->size = cpu_to_le16(MGMT_FRAME_SIZE);
582 frag->flags = 0;
583 frag->address = cpu_to_le32(priv->mgmt_rx[counter].pci_addr);
584 }
585
586 for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) {
587 cb->rx_data_low[counter].address =
588 cpu_to_le32((u32) priv->pci_map_rx_address[counter]);
589 }
590
591 /* since the receive queues are filled with empty fragments, now we can
592 * set the corresponding indexes in the Control Block */
593 priv->control_block->driver_curr_frag[ISL38XX_CB_RX_DATA_LQ] =
594 cpu_to_le32(ISL38XX_CB_RX_QSIZE);
595 priv->control_block->driver_curr_frag[ISL38XX_CB_RX_MGMTQ] =
596 cpu_to_le32(ISL38XX_CB_MGMT_QSIZE);
597
598 /* reset the remaining real index registers and full flags */
599 priv->free_data_rx = 0;
600 priv->free_data_tx = 0;
601 priv->data_low_tx_full = 0;
602
603 if (reload_firmware) { /* Should we load the firmware ? */
604 /* now that the data structures are cleaned up, upload
605 * firmware and reset interface */
606 rc = islpci_upload_fw(priv);
607 if (rc) {
608 printk(KERN_ERR "%s: islpci_reset: failure\n",
609 priv->ndev->name);
610 return rc;
611 }
612 }
613
614 /* finally reset interface */
615 rc = islpci_reset_if(priv);
616 if (rc)
617 printk(KERN_ERR "prism54: Your card/socket may be faulty, or IRQ line too busy :(\n");
618 return rc;
619 }
620
621 /******************************************************************************
622 Network device configuration functions
623 ******************************************************************************/
624 static int
islpci_alloc_memory(islpci_private * priv)625 islpci_alloc_memory(islpci_private *priv)
626 {
627 int counter;
628
629 #if VERBOSE > SHOW_ERROR_MESSAGES
630 printk(KERN_DEBUG "islpci_alloc_memory\n");
631 #endif
632
633 /* remap the PCI device base address to accessible */
634 if (!(priv->device_base =
635 ioremap(pci_resource_start(priv->pdev, 0),
636 ISL38XX_PCI_MEM_SIZE))) {
637 /* error in remapping the PCI device memory address range */
638 printk(KERN_ERR "PCI memory remapping failed\n");
639 return -1;
640 }
641
642 /* memory layout for consistent DMA region:
643 *
644 * Area 1: Control Block for the device interface
645 * Area 2: Power Save Mode Buffer for temporary frame storage. Be aware that
646 * the number of supported stations in the AP determines the minimal
647 * size of the buffer !
648 */
649
650 /* perform the allocation */
651 priv->driver_mem_address = pci_alloc_consistent(priv->pdev,
652 HOST_MEM_BLOCK,
653 &priv->
654 device_host_address);
655
656 if (!priv->driver_mem_address) {
657 /* error allocating the block of PCI memory */
658 printk(KERN_ERR "%s: could not allocate DMA memory, aborting!",
659 "prism54");
660 return -1;
661 }
662
663 /* assign the Control Block to the first address of the allocated area */
664 priv->control_block =
665 (isl38xx_control_block *) priv->driver_mem_address;
666
667 /* set the Power Save Buffer pointer directly behind the CB */
668 priv->device_psm_buffer =
669 priv->device_host_address + CONTROL_BLOCK_SIZE;
670
671 /* make sure all buffer pointers are initialized */
672 for (counter = 0; counter < ISL38XX_CB_QCOUNT; counter++) {
673 priv->control_block->driver_curr_frag[counter] = cpu_to_le32(0);
674 priv->control_block->device_curr_frag[counter] = cpu_to_le32(0);
675 }
676
677 priv->index_mgmt_rx = 0;
678 memset(priv->mgmt_rx, 0, sizeof(priv->mgmt_rx));
679 memset(priv->mgmt_tx, 0, sizeof(priv->mgmt_tx));
680
681 /* allocate rx queue for management frames */
682 if (islpci_mgmt_rx_fill(priv->ndev) < 0)
683 goto out_free;
684
685 /* now get the data rx skb's */
686 memset(priv->data_low_rx, 0, sizeof (priv->data_low_rx));
687 memset(priv->pci_map_rx_address, 0, sizeof (priv->pci_map_rx_address));
688
689 for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) {
690 struct sk_buff *skb;
691
692 /* allocate an sk_buff for received data frames storage
693 * each frame on receive size consists of 1 fragment
694 * include any required allignment operations */
695 if (!(skb = dev_alloc_skb(MAX_FRAGMENT_SIZE_RX + 2))) {
696 /* error allocating an sk_buff structure elements */
697 printk(KERN_ERR "Error allocating skb.\n");
698 skb = NULL;
699 goto out_free;
700 }
701 skb_reserve(skb, (4 - (long) skb->data) & 0x03);
702 /* add the new allocated sk_buff to the buffer array */
703 priv->data_low_rx[counter] = skb;
704
705 /* map the allocated skb data area to pci */
706 priv->pci_map_rx_address[counter] =
707 pci_map_single(priv->pdev, (void *) skb->data,
708 MAX_FRAGMENT_SIZE_RX + 2,
709 PCI_DMA_FROMDEVICE);
710 if (!priv->pci_map_rx_address[counter]) {
711 /* error mapping the buffer to device
712 accessible memory address */
713 printk(KERN_ERR "failed to map skb DMA'able\n");
714 goto out_free;
715 }
716 }
717
718 prism54_acl_init(&priv->acl);
719 prism54_wpa_bss_ie_init(priv);
720 if (mgt_init(priv))
721 goto out_free;
722
723 return 0;
724 out_free:
725 islpci_free_memory(priv);
726 return -1;
727 }
728
729 int
islpci_free_memory(islpci_private * priv)730 islpci_free_memory(islpci_private *priv)
731 {
732 int counter;
733
734 if (priv->device_base)
735 iounmap(priv->device_base);
736 priv->device_base = NULL;
737
738 /* free consistent DMA area... */
739 if (priv->driver_mem_address)
740 pci_free_consistent(priv->pdev, HOST_MEM_BLOCK,
741 priv->driver_mem_address,
742 priv->device_host_address);
743
744 /* clear some dangling pointers */
745 priv->driver_mem_address = NULL;
746 priv->device_host_address = 0;
747 priv->device_psm_buffer = 0;
748 priv->control_block = NULL;
749
750 /* clean up mgmt rx buffers */
751 for (counter = 0; counter < ISL38XX_CB_MGMT_QSIZE; counter++) {
752 struct islpci_membuf *buf = &priv->mgmt_rx[counter];
753 if (buf->pci_addr)
754 pci_unmap_single(priv->pdev, buf->pci_addr,
755 buf->size, PCI_DMA_FROMDEVICE);
756 buf->pci_addr = 0;
757 kfree(buf->mem);
758 buf->size = 0;
759 buf->mem = NULL;
760 }
761
762 /* clean up data rx buffers */
763 for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) {
764 if (priv->pci_map_rx_address[counter])
765 pci_unmap_single(priv->pdev,
766 priv->pci_map_rx_address[counter],
767 MAX_FRAGMENT_SIZE_RX + 2,
768 PCI_DMA_FROMDEVICE);
769 priv->pci_map_rx_address[counter] = 0;
770
771 if (priv->data_low_rx[counter])
772 dev_kfree_skb(priv->data_low_rx[counter]);
773 priv->data_low_rx[counter] = NULL;
774 }
775
776 /* Free the access control list and the WPA list */
777 prism54_acl_clean(&priv->acl);
778 prism54_wpa_bss_ie_clean(priv);
779 mgt_clean(priv);
780
781 return 0;
782 }
783
784 #if 0
785 static void
786 islpci_set_multicast_list(struct net_device *dev)
787 {
788 /* put device into promisc mode and let network layer handle it */
789 }
790 #endif
791
islpci_ethtool_get_drvinfo(struct net_device * dev,struct ethtool_drvinfo * info)792 static void islpci_ethtool_get_drvinfo(struct net_device *dev,
793 struct ethtool_drvinfo *info)
794 {
795 strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
796 strlcpy(info->version, DRV_VERSION, sizeof(info->version));
797 }
798
799 static const struct ethtool_ops islpci_ethtool_ops = {
800 .get_drvinfo = islpci_ethtool_get_drvinfo,
801 };
802
803 static const struct net_device_ops islpci_netdev_ops = {
804 .ndo_open = islpci_open,
805 .ndo_stop = islpci_close,
806 .ndo_start_xmit = islpci_eth_transmit,
807 .ndo_tx_timeout = islpci_eth_tx_timeout,
808 .ndo_set_mac_address = prism54_set_mac_address,
809 .ndo_change_mtu = eth_change_mtu,
810 .ndo_validate_addr = eth_validate_addr,
811 };
812
813 static struct device_type wlan_type = {
814 .name = "wlan",
815 };
816
817 struct net_device *
islpci_setup(struct pci_dev * pdev)818 islpci_setup(struct pci_dev *pdev)
819 {
820 islpci_private *priv;
821 struct net_device *ndev = alloc_etherdev(sizeof (islpci_private));
822
823 if (!ndev)
824 return ndev;
825
826 pci_set_drvdata(pdev, ndev);
827 SET_NETDEV_DEV(ndev, &pdev->dev);
828 SET_NETDEV_DEVTYPE(ndev, &wlan_type);
829
830 /* setup the structure members */
831 ndev->base_addr = pci_resource_start(pdev, 0);
832 ndev->irq = pdev->irq;
833
834 /* initialize the function pointers */
835 ndev->netdev_ops = &islpci_netdev_ops;
836 ndev->wireless_handlers = &prism54_handler_def;
837 ndev->ethtool_ops = &islpci_ethtool_ops;
838
839 /* ndev->set_multicast_list = &islpci_set_multicast_list; */
840 ndev->addr_len = ETH_ALEN;
841 /* Get a non-zero dummy MAC address for nameif. Jean II */
842 memcpy(ndev->dev_addr, dummy_mac, ETH_ALEN);
843
844 ndev->watchdog_timeo = ISLPCI_TX_TIMEOUT;
845
846 /* allocate a private device structure to the network device */
847 priv = netdev_priv(ndev);
848 priv->ndev = ndev;
849 priv->pdev = pdev;
850 priv->monitor_type = ARPHRD_IEEE80211;
851 priv->ndev->type = (priv->iw_mode == IW_MODE_MONITOR) ?
852 priv->monitor_type : ARPHRD_ETHER;
853
854 /* Add pointers to enable iwspy support. */
855 priv->wireless_data.spy_data = &priv->spy_data;
856 ndev->wireless_data = &priv->wireless_data;
857
858 /* save the start and end address of the PCI memory area */
859 ndev->mem_start = (unsigned long) priv->device_base;
860 ndev->mem_end = ndev->mem_start + ISL38XX_PCI_MEM_SIZE;
861
862 #if VERBOSE > SHOW_ERROR_MESSAGES
863 DEBUG(SHOW_TRACING, "PCI Memory remapped to 0x%p\n", priv->device_base);
864 #endif
865
866 init_waitqueue_head(&priv->reset_done);
867
868 /* init the queue read locks, process wait counter */
869 mutex_init(&priv->mgmt_lock);
870 priv->mgmt_received = NULL;
871 init_waitqueue_head(&priv->mgmt_wqueue);
872 mutex_init(&priv->stats_lock);
873 spin_lock_init(&priv->slock);
874
875 /* init state machine with off#1 state */
876 priv->state = PRV_STATE_OFF;
877 priv->state_off = 1;
878
879 /* initialize workqueue's */
880 INIT_WORK(&priv->stats_work, prism54_update_stats);
881 priv->stats_timestamp = 0;
882
883 INIT_WORK(&priv->reset_task, islpci_do_reset_and_wake);
884 priv->reset_task_pending = 0;
885
886 /* allocate various memory areas */
887 if (islpci_alloc_memory(priv))
888 goto do_free_netdev;
889
890 /* select the firmware file depending on the device id */
891 switch (pdev->device) {
892 case 0x3877:
893 strcpy(priv->firmware, ISL3877_IMAGE_FILE);
894 break;
895
896 case 0x3886:
897 strcpy(priv->firmware, ISL3886_IMAGE_FILE);
898 break;
899
900 default:
901 strcpy(priv->firmware, ISL3890_IMAGE_FILE);
902 break;
903 }
904
905 if (register_netdev(ndev)) {
906 DEBUG(SHOW_ERROR_MESSAGES,
907 "ERROR: register_netdev() failed\n");
908 goto do_islpci_free_memory;
909 }
910
911 return ndev;
912
913 do_islpci_free_memory:
914 islpci_free_memory(priv);
915 do_free_netdev:
916 free_netdev(ndev);
917 priv = NULL;
918 return NULL;
919 }
920
921 islpci_state_t
islpci_set_state(islpci_private * priv,islpci_state_t new_state)922 islpci_set_state(islpci_private *priv, islpci_state_t new_state)
923 {
924 islpci_state_t old_state;
925
926 /* lock */
927 old_state = priv->state;
928
929 /* this means either a race condition or some serious error in
930 * the driver code */
931 switch (new_state) {
932 case PRV_STATE_OFF:
933 priv->state_off++;
934 default:
935 priv->state = new_state;
936 break;
937
938 case PRV_STATE_PREBOOT:
939 /* there are actually many off-states, enumerated by
940 * state_off */
941 if (old_state == PRV_STATE_OFF)
942 priv->state_off--;
943
944 /* only if hw_unavailable is zero now it means we either
945 * were in off#1 state, or came here from
946 * somewhere else */
947 if (!priv->state_off)
948 priv->state = new_state;
949 break;
950 }
951 #if 0
952 printk(KERN_DEBUG "%s: state transition %d -> %d (off#%d)\n",
953 priv->ndev->name, old_state, new_state, priv->state_off);
954 #endif
955
956 /* invariants */
957 BUG_ON(priv->state_off < 0);
958 BUG_ON(priv->state_off && (priv->state != PRV_STATE_OFF));
959 BUG_ON(!priv->state_off && (priv->state == PRV_STATE_OFF));
960
961 /* unlock */
962 return old_state;
963 }
964