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Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
[deliverable/linux.git] / drivers / net / wireless / prism54 / islpci_dev.c
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, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 *
19 */
20
21 #include <linux/module.h>
22
23 #include <linux/netdevice.h>
24 #include <linux/pci.h>
25 #include <linux/etherdevice.h>
26 #include <linux/delay.h>
27 #include <linux/if_arp.h>
28
29 #include <asm/io.h>
30
31 #include "prismcompat.h"
32 #include "isl_38xx.h"
33 #include "isl_ioctl.h"
34 #include "islpci_dev.h"
35 #include "islpci_mgt.h"
36 #include "islpci_eth.h"
37 #include "oid_mgt.h"
38
39 #define ISL3877_IMAGE_FILE "isl3877"
40 #define ISL3886_IMAGE_FILE "isl3886"
41 #define ISL3890_IMAGE_FILE "isl3890"
42
43 static int prism54_bring_down(islpci_private *);
44 static int islpci_alloc_memory(islpci_private *);
45 static struct net_device_stats *islpci_statistics(struct net_device *);
46
47 /* Temporary dummy MAC address to use until firmware is loaded.
48 * The idea there is that some tools (such as nameif) may query
49 * the MAC address before the netdev is 'open'. By using a valid
50 * OUI prefix, they can process the netdev properly.
51 * Of course, this is not the final/real MAC address. It doesn't
52 * matter, as you are suppose to be able to change it anytime via
53 * ndev->set_mac_address. Jean II */
54 static const unsigned char dummy_mac[6] = { 0x00, 0x30, 0xB4, 0x00, 0x00, 0x00 };
55
56 static int
57 isl_upload_firmware(islpci_private *priv)
58 {
59 u32 reg, rc;
60 void __iomem *device_base = priv->device_base;
61
62 /* clear the RAMBoot and the Reset bit */
63 reg = readl(device_base + ISL38XX_CTRL_STAT_REG);
64 reg &= ~ISL38XX_CTRL_STAT_RESET;
65 reg &= ~ISL38XX_CTRL_STAT_RAMBOOT;
66 writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
67 wmb();
68 udelay(ISL38XX_WRITEIO_DELAY);
69
70 /* set the Reset bit without reading the register ! */
71 reg |= ISL38XX_CTRL_STAT_RESET;
72 writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
73 wmb();
74 udelay(ISL38XX_WRITEIO_DELAY);
75
76 /* clear the Reset bit */
77 reg &= ~ISL38XX_CTRL_STAT_RESET;
78 writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
79 wmb();
80
81 /* wait a while for the device to reboot */
82 mdelay(50);
83
84 {
85 const struct firmware *fw_entry = NULL;
86 long fw_len;
87 const u32 *fw_ptr;
88
89 rc = request_firmware(&fw_entry, priv->firmware, PRISM_FW_PDEV);
90 if (rc) {
91 printk(KERN_ERR
92 "%s: request_firmware() failed for '%s'\n",
93 "prism54", priv->firmware);
94 return rc;
95 }
96 /* prepare the Direct Memory Base register */
97 reg = ISL38XX_DEV_FIRMWARE_ADDRES;
98
99 fw_ptr = (u32 *) fw_entry->data;
100 fw_len = fw_entry->size;
101
102 if (fw_len % 4) {
103 printk(KERN_ERR
104 "%s: firmware '%s' size is not multiple of 32bit, aborting!\n",
105 "prism54", priv->firmware);
106 release_firmware(fw_entry);
107 return -EILSEQ; /* Illegal byte sequence */;
108 }
109
110 while (fw_len > 0) {
111 long _fw_len =
112 (fw_len >
113 ISL38XX_MEMORY_WINDOW_SIZE) ?
114 ISL38XX_MEMORY_WINDOW_SIZE : fw_len;
115 u32 __iomem *dev_fw_ptr = device_base + ISL38XX_DIRECT_MEM_WIN;
116
117 /* set the cards base address for writting the data */
118 isl38xx_w32_flush(device_base, reg,
119 ISL38XX_DIR_MEM_BASE_REG);
120 wmb(); /* be paranoid */
121
122 /* increment the write address for next iteration */
123 reg += _fw_len;
124 fw_len -= _fw_len;
125
126 /* write the data to the Direct Memory Window 32bit-wise */
127 /* memcpy_toio() doesn't guarantee 32bit writes :-| */
128 while (_fw_len > 0) {
129 /* use non-swapping writel() */
130 __raw_writel(*fw_ptr, dev_fw_ptr);
131 fw_ptr++, dev_fw_ptr++;
132 _fw_len -= 4;
133 }
134
135 /* flush PCI posting */
136 (void) readl(device_base + ISL38XX_PCI_POSTING_FLUSH);
137 wmb(); /* be paranoid again */
138
139 BUG_ON(_fw_len != 0);
140 }
141
142 BUG_ON(fw_len != 0);
143
144 /* Firmware version is at offset 40 (also for "newmac") */
145 printk(KERN_DEBUG "%s: firmware version: %.8s\n",
146 priv->ndev->name, fw_entry->data + 40);
147
148 release_firmware(fw_entry);
149 }
150
151 /* now reset the device
152 * clear the Reset & ClkRun bit, set the RAMBoot bit */
153 reg = readl(device_base + ISL38XX_CTRL_STAT_REG);
154 reg &= ~ISL38XX_CTRL_STAT_CLKRUN;
155 reg &= ~ISL38XX_CTRL_STAT_RESET;
156 reg |= ISL38XX_CTRL_STAT_RAMBOOT;
157 isl38xx_w32_flush(device_base, reg, ISL38XX_CTRL_STAT_REG);
158 wmb();
159 udelay(ISL38XX_WRITEIO_DELAY);
160
161 /* set the reset bit latches the host override and RAMBoot bits
162 * into the device for operation when the reset bit is reset */
163 reg |= ISL38XX_CTRL_STAT_RESET;
164 writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
165 /* don't do flush PCI posting here! */
166 wmb();
167 udelay(ISL38XX_WRITEIO_DELAY);
168
169 /* clear the reset bit should start the whole circus */
170 reg &= ~ISL38XX_CTRL_STAT_RESET;
171 writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
172 /* don't do flush PCI posting here! */
173 wmb();
174 udelay(ISL38XX_WRITEIO_DELAY);
175
176 return 0;
177 }
178
179 /******************************************************************************
180 Device Interrupt Handler
181 ******************************************************************************/
182
183 irqreturn_t
184 islpci_interrupt(int irq, void *config)
185 {
186 u32 reg;
187 islpci_private *priv = config;
188 struct net_device *ndev = priv->ndev;
189 void __iomem *device = priv->device_base;
190 int powerstate = ISL38XX_PSM_POWERSAVE_STATE;
191
192 /* lock the interrupt handler */
193 spin_lock(&priv->slock);
194
195 /* received an interrupt request on a shared IRQ line
196 * first check whether the device is in sleep mode */
197 reg = readl(device + ISL38XX_CTRL_STAT_REG);
198 if (reg & ISL38XX_CTRL_STAT_SLEEPMODE)
199 /* device is in sleep mode, IRQ was generated by someone else */
200 {
201 #if VERBOSE > SHOW_ERROR_MESSAGES
202 DEBUG(SHOW_TRACING, "Assuming someone else called the IRQ\n");
203 #endif
204 spin_unlock(&priv->slock);
205 return IRQ_NONE;
206 }
207
208
209 /* check whether there is any source of interrupt on the device */
210 reg = readl(device + ISL38XX_INT_IDENT_REG);
211
212 /* also check the contents of the Interrupt Enable Register, because this
213 * will filter out interrupt sources from other devices on the same irq ! */
214 reg &= readl(device + ISL38XX_INT_EN_REG);
215 reg &= ISL38XX_INT_SOURCES;
216
217 if (reg != 0) {
218 if (islpci_get_state(priv) != PRV_STATE_SLEEP)
219 powerstate = ISL38XX_PSM_ACTIVE_STATE;
220
221 /* reset the request bits in the Identification register */
222 isl38xx_w32_flush(device, reg, ISL38XX_INT_ACK_REG);
223
224 #if VERBOSE > SHOW_ERROR_MESSAGES
225 DEBUG(SHOW_FUNCTION_CALLS,
226 "IRQ: Identification register 0x%p 0x%x \n", device, reg);
227 #endif
228
229 /* check for each bit in the register separately */
230 if (reg & ISL38XX_INT_IDENT_UPDATE) {
231 #if VERBOSE > SHOW_ERROR_MESSAGES
232 /* Queue has been updated */
233 DEBUG(SHOW_TRACING, "IRQ: Update flag \n");
234
235 DEBUG(SHOW_QUEUE_INDEXES,
236 "CB drv Qs: [%i][%i][%i][%i][%i][%i]\n",
237 le32_to_cpu(priv->control_block->
238 driver_curr_frag[0]),
239 le32_to_cpu(priv->control_block->
240 driver_curr_frag[1]),
241 le32_to_cpu(priv->control_block->
242 driver_curr_frag[2]),
243 le32_to_cpu(priv->control_block->
244 driver_curr_frag[3]),
245 le32_to_cpu(priv->control_block->
246 driver_curr_frag[4]),
247 le32_to_cpu(priv->control_block->
248 driver_curr_frag[5])
249 );
250
251 DEBUG(SHOW_QUEUE_INDEXES,
252 "CB dev Qs: [%i][%i][%i][%i][%i][%i]\n",
253 le32_to_cpu(priv->control_block->
254 device_curr_frag[0]),
255 le32_to_cpu(priv->control_block->
256 device_curr_frag[1]),
257 le32_to_cpu(priv->control_block->
258 device_curr_frag[2]),
259 le32_to_cpu(priv->control_block->
260 device_curr_frag[3]),
261 le32_to_cpu(priv->control_block->
262 device_curr_frag[4]),
263 le32_to_cpu(priv->control_block->
264 device_curr_frag[5])
265 );
266 #endif
267
268 /* cleanup the data low transmit queue */
269 islpci_eth_cleanup_transmit(priv, priv->control_block);
270
271 /* device is in active state, update the
272 * powerstate flag if necessary */
273 powerstate = ISL38XX_PSM_ACTIVE_STATE;
274
275 /* check all three queues in priority order
276 * call the PIMFOR receive function until the
277 * queue is empty */
278 if (isl38xx_in_queue(priv->control_block,
279 ISL38XX_CB_RX_MGMTQ) != 0) {
280 #if VERBOSE > SHOW_ERROR_MESSAGES
281 DEBUG(SHOW_TRACING,
282 "Received frame in Management Queue\n");
283 #endif
284 islpci_mgt_receive(ndev);
285
286 islpci_mgt_cleanup_transmit(ndev);
287
288 /* Refill slots in receive queue */
289 islpci_mgmt_rx_fill(ndev);
290
291 /* no need to trigger the device, next
292 islpci_mgt_transaction does it */
293 }
294
295 while (isl38xx_in_queue(priv->control_block,
296 ISL38XX_CB_RX_DATA_LQ) != 0) {
297 #if VERBOSE > SHOW_ERROR_MESSAGES
298 DEBUG(SHOW_TRACING,
299 "Received frame in Data Low Queue \n");
300 #endif
301 islpci_eth_receive(priv);
302 }
303
304 /* check whether the data transmit queues were full */
305 if (priv->data_low_tx_full) {
306 /* check whether the transmit is not full anymore */
307 if (ISL38XX_CB_TX_QSIZE -
308 isl38xx_in_queue(priv->control_block,
309 ISL38XX_CB_TX_DATA_LQ) >=
310 ISL38XX_MIN_QTHRESHOLD) {
311 /* nope, the driver is ready for more network frames */
312 netif_wake_queue(priv->ndev);
313
314 /* reset the full flag */
315 priv->data_low_tx_full = 0;
316 }
317 }
318 }
319
320 if (reg & ISL38XX_INT_IDENT_INIT) {
321 /* Device has been initialized */
322 #if VERBOSE > SHOW_ERROR_MESSAGES
323 DEBUG(SHOW_TRACING,
324 "IRQ: Init flag, device initialized \n");
325 #endif
326 wake_up(&priv->reset_done);
327 }
328
329 if (reg & ISL38XX_INT_IDENT_SLEEP) {
330 /* Device intends to move to powersave state */
331 #if VERBOSE > SHOW_ERROR_MESSAGES
332 DEBUG(SHOW_TRACING, "IRQ: Sleep flag \n");
333 #endif
334 isl38xx_handle_sleep_request(priv->control_block,
335 &powerstate,
336 priv->device_base);
337 }
338
339 if (reg & ISL38XX_INT_IDENT_WAKEUP) {
340 /* Device has been woken up to active state */
341 #if VERBOSE > SHOW_ERROR_MESSAGES
342 DEBUG(SHOW_TRACING, "IRQ: Wakeup flag \n");
343 #endif
344
345 isl38xx_handle_wakeup(priv->control_block,
346 &powerstate, priv->device_base);
347 }
348 } else {
349 #if VERBOSE > SHOW_ERROR_MESSAGES
350 DEBUG(SHOW_TRACING, "Assuming someone else called the IRQ\n");
351 #endif
352 spin_unlock(&priv->slock);
353 return IRQ_NONE;
354 }
355
356 /* sleep -> ready */
357 if (islpci_get_state(priv) == PRV_STATE_SLEEP
358 && powerstate == ISL38XX_PSM_ACTIVE_STATE)
359 islpci_set_state(priv, PRV_STATE_READY);
360
361 /* !sleep -> sleep */
362 if (islpci_get_state(priv) != PRV_STATE_SLEEP
363 && powerstate == ISL38XX_PSM_POWERSAVE_STATE)
364 islpci_set_state(priv, PRV_STATE_SLEEP);
365
366 /* unlock the interrupt handler */
367 spin_unlock(&priv->slock);
368
369 return IRQ_HANDLED;
370 }
371
372 /******************************************************************************
373 Network Interface Control & Statistical functions
374 ******************************************************************************/
375 static int
376 islpci_open(struct net_device *ndev)
377 {
378 u32 rc;
379 islpci_private *priv = netdev_priv(ndev);
380
381 /* reset data structures, upload firmware and reset device */
382 rc = islpci_reset(priv,1);
383 if (rc) {
384 prism54_bring_down(priv);
385 return rc; /* Returns informative message */
386 }
387
388 netif_start_queue(ndev);
389 /* netif_mark_up( ndev ); */
390
391 return 0;
392 }
393
394 static int
395 islpci_close(struct net_device *ndev)
396 {
397 islpci_private *priv = netdev_priv(ndev);
398
399 printk(KERN_DEBUG "%s: islpci_close ()\n", ndev->name);
400
401 netif_stop_queue(ndev);
402
403 return prism54_bring_down(priv);
404 }
405
406 static int
407 prism54_bring_down(islpci_private *priv)
408 {
409 void __iomem *device_base = priv->device_base;
410 u32 reg;
411 /* we are going to shutdown the device */
412 islpci_set_state(priv, PRV_STATE_PREBOOT);
413
414 /* disable all device interrupts in case they weren't */
415 isl38xx_disable_interrupts(priv->device_base);
416
417 /* For safety reasons, we may want to ensure that no DMA transfer is
418 * currently in progress by emptying the TX and RX queues. */
419
420 /* wait until interrupts have finished executing on other CPUs */
421 synchronize_irq(priv->pdev->irq);
422
423 reg = readl(device_base + ISL38XX_CTRL_STAT_REG);
424 reg &= ~(ISL38XX_CTRL_STAT_RESET | ISL38XX_CTRL_STAT_RAMBOOT);
425 writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
426 wmb();
427 udelay(ISL38XX_WRITEIO_DELAY);
428
429 reg |= ISL38XX_CTRL_STAT_RESET;
430 writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
431 wmb();
432 udelay(ISL38XX_WRITEIO_DELAY);
433
434 /* clear the Reset bit */
435 reg &= ~ISL38XX_CTRL_STAT_RESET;
436 writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
437 wmb();
438
439 /* wait a while for the device to reset */
440 schedule_timeout_uninterruptible(msecs_to_jiffies(50));
441
442 return 0;
443 }
444
445 static int
446 islpci_upload_fw(islpci_private *priv)
447 {
448 islpci_state_t old_state;
449 u32 rc;
450
451 old_state = islpci_set_state(priv, PRV_STATE_BOOT);
452
453 printk(KERN_DEBUG "%s: uploading firmware...\n", priv->ndev->name);
454
455 rc = isl_upload_firmware(priv);
456 if (rc) {
457 /* error uploading the firmware */
458 printk(KERN_ERR "%s: could not upload firmware ('%s')\n",
459 priv->ndev->name, priv->firmware);
460
461 islpci_set_state(priv, old_state);
462 return rc;
463 }
464
465 printk(KERN_DEBUG "%s: firmware upload complete\n",
466 priv->ndev->name);
467
468 islpci_set_state(priv, PRV_STATE_POSTBOOT);
469
470 return 0;
471 }
472
473 static int
474 islpci_reset_if(islpci_private *priv)
475 {
476 long remaining;
477 int result = -ETIME;
478 int count;
479
480 DEFINE_WAIT(wait);
481 prepare_to_wait(&priv->reset_done, &wait, TASK_UNINTERRUPTIBLE);
482
483 /* now the last step is to reset the interface */
484 isl38xx_interface_reset(priv->device_base, priv->device_host_address);
485 islpci_set_state(priv, PRV_STATE_PREINIT);
486
487 for(count = 0; count < 2 && result; count++) {
488 /* The software reset acknowledge needs about 220 msec here.
489 * Be conservative and wait for up to one second. */
490
491 remaining = schedule_timeout_uninterruptible(HZ);
492
493 if(remaining > 0) {
494 result = 0;
495 break;
496 }
497
498 /* If we're here it's because our IRQ hasn't yet gone through.
499 * Retry a bit more...
500 */
501 printk(KERN_ERR "%s: no 'reset complete' IRQ seen - retrying\n",
502 priv->ndev->name);
503 }
504
505 finish_wait(&priv->reset_done, &wait);
506
507 if (result) {
508 printk(KERN_ERR "%s: interface reset failure\n", priv->ndev->name);
509 return result;
510 }
511
512 islpci_set_state(priv, PRV_STATE_INIT);
513
514 /* Now that the device is 100% up, let's allow
515 * for the other interrupts --
516 * NOTE: this is not *yet* true since we've only allowed the
517 * INIT interrupt on the IRQ line. We can perhaps poll
518 * the IRQ line until we know for sure the reset went through */
519 isl38xx_enable_common_interrupts(priv->device_base);
520
521 down_write(&priv->mib_sem);
522 result = mgt_commit(priv);
523 if (result) {
524 printk(KERN_ERR "%s: interface reset failure\n", priv->ndev->name);
525 up_write(&priv->mib_sem);
526 return result;
527 }
528 up_write(&priv->mib_sem);
529
530 islpci_set_state(priv, PRV_STATE_READY);
531
532 printk(KERN_DEBUG "%s: interface reset complete\n", priv->ndev->name);
533 return 0;
534 }
535
536 int
537 islpci_reset(islpci_private *priv, int reload_firmware)
538 {
539 isl38xx_control_block *cb = /* volatile not needed */
540 (isl38xx_control_block *) priv->control_block;
541 unsigned counter;
542 int rc;
543
544 if (reload_firmware)
545 islpci_set_state(priv, PRV_STATE_PREBOOT);
546 else
547 islpci_set_state(priv, PRV_STATE_POSTBOOT);
548
549 printk(KERN_DEBUG "%s: resetting device...\n", priv->ndev->name);
550
551 /* disable all device interrupts in case they weren't */
552 isl38xx_disable_interrupts(priv->device_base);
553
554 /* flush all management queues */
555 priv->index_mgmt_tx = 0;
556 priv->index_mgmt_rx = 0;
557
558 /* clear the indexes in the frame pointer */
559 for (counter = 0; counter < ISL38XX_CB_QCOUNT; counter++) {
560 cb->driver_curr_frag[counter] = cpu_to_le32(0);
561 cb->device_curr_frag[counter] = cpu_to_le32(0);
562 }
563
564 /* reset the mgmt receive queue */
565 for (counter = 0; counter < ISL38XX_CB_MGMT_QSIZE; counter++) {
566 isl38xx_fragment *frag = &cb->rx_data_mgmt[counter];
567 frag->size = cpu_to_le16(MGMT_FRAME_SIZE);
568 frag->flags = 0;
569 frag->address = cpu_to_le32(priv->mgmt_rx[counter].pci_addr);
570 }
571
572 for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) {
573 cb->rx_data_low[counter].address =
574 cpu_to_le32((u32) priv->pci_map_rx_address[counter]);
575 }
576
577 /* since the receive queues are filled with empty fragments, now we can
578 * set the corresponding indexes in the Control Block */
579 priv->control_block->driver_curr_frag[ISL38XX_CB_RX_DATA_LQ] =
580 cpu_to_le32(ISL38XX_CB_RX_QSIZE);
581 priv->control_block->driver_curr_frag[ISL38XX_CB_RX_MGMTQ] =
582 cpu_to_le32(ISL38XX_CB_MGMT_QSIZE);
583
584 /* reset the remaining real index registers and full flags */
585 priv->free_data_rx = 0;
586 priv->free_data_tx = 0;
587 priv->data_low_tx_full = 0;
588
589 if (reload_firmware) { /* Should we load the firmware ? */
590 /* now that the data structures are cleaned up, upload
591 * firmware and reset interface */
592 rc = islpci_upload_fw(priv);
593 if (rc) {
594 printk(KERN_ERR "%s: islpci_reset: failure\n",
595 priv->ndev->name);
596 return rc;
597 }
598 }
599
600 /* finally reset interface */
601 rc = islpci_reset_if(priv);
602 if (rc)
603 printk(KERN_ERR "prism54: Your card/socket may be faulty, or IRQ line too busy :(\n");
604 return rc;
605 }
606
607 static struct net_device_stats *
608 islpci_statistics(struct net_device *ndev)
609 {
610 islpci_private *priv = netdev_priv(ndev);
611
612 #if VERBOSE > SHOW_ERROR_MESSAGES
613 DEBUG(SHOW_FUNCTION_CALLS, "islpci_statistics\n");
614 #endif
615
616 return &priv->statistics;
617 }
618
619 /******************************************************************************
620 Network device configuration functions
621 ******************************************************************************/
622 static int
623 islpci_alloc_memory(islpci_private *priv)
624 {
625 int counter;
626
627 #if VERBOSE > SHOW_ERROR_MESSAGES
628 printk(KERN_DEBUG "islpci_alloc_memory\n");
629 #endif
630
631 /* remap the PCI device base address to accessable */
632 if (!(priv->device_base =
633 ioremap(pci_resource_start(priv->pdev, 0),
634 ISL38XX_PCI_MEM_SIZE))) {
635 /* error in remapping the PCI device memory address range */
636 printk(KERN_ERR "PCI memory remapping failed \n");
637 return -1;
638 }
639
640 /* memory layout for consistent DMA region:
641 *
642 * Area 1: Control Block for the device interface
643 * Area 2: Power Save Mode Buffer for temporary frame storage. Be aware that
644 * the number of supported stations in the AP determines the minimal
645 * size of the buffer !
646 */
647
648 /* perform the allocation */
649 priv->driver_mem_address = pci_alloc_consistent(priv->pdev,
650 HOST_MEM_BLOCK,
651 &priv->
652 device_host_address);
653
654 if (!priv->driver_mem_address) {
655 /* error allocating the block of PCI memory */
656 printk(KERN_ERR "%s: could not allocate DMA memory, aborting!",
657 "prism54");
658 return -1;
659 }
660
661 /* assign the Control Block to the first address of the allocated area */
662 priv->control_block =
663 (isl38xx_control_block *) priv->driver_mem_address;
664
665 /* set the Power Save Buffer pointer directly behind the CB */
666 priv->device_psm_buffer =
667 priv->device_host_address + CONTROL_BLOCK_SIZE;
668
669 /* make sure all buffer pointers are initialized */
670 for (counter = 0; counter < ISL38XX_CB_QCOUNT; counter++) {
671 priv->control_block->driver_curr_frag[counter] = cpu_to_le32(0);
672 priv->control_block->device_curr_frag[counter] = cpu_to_le32(0);
673 }
674
675 priv->index_mgmt_rx = 0;
676 memset(priv->mgmt_rx, 0, sizeof(priv->mgmt_rx));
677 memset(priv->mgmt_tx, 0, sizeof(priv->mgmt_tx));
678
679 /* allocate rx queue for management frames */
680 if (islpci_mgmt_rx_fill(priv->ndev) < 0)
681 goto out_free;
682
683 /* now get the data rx skb's */
684 memset(priv->data_low_rx, 0, sizeof (priv->data_low_rx));
685 memset(priv->pci_map_rx_address, 0, sizeof (priv->pci_map_rx_address));
686
687 for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) {
688 struct sk_buff *skb;
689
690 /* allocate an sk_buff for received data frames storage
691 * each frame on receive size consists of 1 fragment
692 * include any required allignment operations */
693 if (!(skb = dev_alloc_skb(MAX_FRAGMENT_SIZE_RX + 2))) {
694 /* error allocating an sk_buff structure elements */
695 printk(KERN_ERR "Error allocating skb.\n");
696 skb = NULL;
697 goto out_free;
698 }
699 skb_reserve(skb, (4 - (long) skb->data) & 0x03);
700 /* add the new allocated sk_buff to the buffer array */
701 priv->data_low_rx[counter] = skb;
702
703 /* map the allocated skb data area to pci */
704 priv->pci_map_rx_address[counter] =
705 pci_map_single(priv->pdev, (void *) skb->data,
706 MAX_FRAGMENT_SIZE_RX + 2,
707 PCI_DMA_FROMDEVICE);
708 if (!priv->pci_map_rx_address[counter]) {
709 /* error mapping the buffer to device
710 accessable memory address */
711 printk(KERN_ERR "failed to map skb DMA'able\n");
712 goto out_free;
713 }
714 }
715
716 prism54_acl_init(&priv->acl);
717 prism54_wpa_bss_ie_init(priv);
718 if (mgt_init(priv))
719 goto out_free;
720
721 return 0;
722 out_free:
723 islpci_free_memory(priv);
724 return -1;
725 }
726
727 int
728 islpci_free_memory(islpci_private *priv)
729 {
730 int counter;
731
732 if (priv->device_base)
733 iounmap(priv->device_base);
734 priv->device_base = NULL;
735
736 /* free consistent DMA area... */
737 if (priv->driver_mem_address)
738 pci_free_consistent(priv->pdev, HOST_MEM_BLOCK,
739 priv->driver_mem_address,
740 priv->device_host_address);
741
742 /* clear some dangling pointers */
743 priv->driver_mem_address = NULL;
744 priv->device_host_address = 0;
745 priv->device_psm_buffer = 0;
746 priv->control_block = NULL;
747
748 /* clean up mgmt rx buffers */
749 for (counter = 0; counter < ISL38XX_CB_MGMT_QSIZE; counter++) {
750 struct islpci_membuf *buf = &priv->mgmt_rx[counter];
751 if (buf->pci_addr)
752 pci_unmap_single(priv->pdev, buf->pci_addr,
753 buf->size, PCI_DMA_FROMDEVICE);
754 buf->pci_addr = 0;
755 kfree(buf->mem);
756 buf->size = 0;
757 buf->mem = NULL;
758 }
759
760 /* clean up data rx buffers */
761 for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) {
762 if (priv->pci_map_rx_address[counter])
763 pci_unmap_single(priv->pdev,
764 priv->pci_map_rx_address[counter],
765 MAX_FRAGMENT_SIZE_RX + 2,
766 PCI_DMA_FROMDEVICE);
767 priv->pci_map_rx_address[counter] = 0;
768
769 if (priv->data_low_rx[counter])
770 dev_kfree_skb(priv->data_low_rx[counter]);
771 priv->data_low_rx[counter] = NULL;
772 }
773
774 /* Free the acces control list and the WPA list */
775 prism54_acl_clean(&priv->acl);
776 prism54_wpa_bss_ie_clean(priv);
777 mgt_clean(priv);
778
779 return 0;
780 }
781
782 #if 0
783 static void
784 islpci_set_multicast_list(struct net_device *dev)
785 {
786 /* put device into promisc mode and let network layer handle it */
787 }
788 #endif
789
790 struct net_device *
791 islpci_setup(struct pci_dev *pdev)
792 {
793 islpci_private *priv;
794 struct net_device *ndev = alloc_etherdev(sizeof (islpci_private));
795
796 if (!ndev)
797 return ndev;
798
799 SET_MODULE_OWNER(ndev);
800 pci_set_drvdata(pdev, ndev);
801 #if defined(SET_NETDEV_DEV)
802 SET_NETDEV_DEV(ndev, &pdev->dev);
803 #endif
804
805 /* setup the structure members */
806 ndev->base_addr = pci_resource_start(pdev, 0);
807 ndev->irq = pdev->irq;
808
809 /* initialize the function pointers */
810 ndev->open = &islpci_open;
811 ndev->stop = &islpci_close;
812 ndev->get_stats = &islpci_statistics;
813 ndev->do_ioctl = &prism54_ioctl;
814 ndev->wireless_handlers =
815 (struct iw_handler_def *) &prism54_handler_def;
816
817 ndev->hard_start_xmit = &islpci_eth_transmit;
818 /* ndev->set_multicast_list = &islpci_set_multicast_list; */
819 ndev->addr_len = ETH_ALEN;
820 ndev->set_mac_address = &prism54_set_mac_address;
821 /* Get a non-zero dummy MAC address for nameif. Jean II */
822 memcpy(ndev->dev_addr, dummy_mac, 6);
823
824 #ifdef HAVE_TX_TIMEOUT
825 ndev->watchdog_timeo = ISLPCI_TX_TIMEOUT;
826 ndev->tx_timeout = &islpci_eth_tx_timeout;
827 #endif
828
829 /* allocate a private device structure to the network device */
830 priv = netdev_priv(ndev);
831 priv->ndev = ndev;
832 priv->pdev = pdev;
833 priv->monitor_type = ARPHRD_IEEE80211;
834 priv->ndev->type = (priv->iw_mode == IW_MODE_MONITOR) ?
835 priv->monitor_type : ARPHRD_ETHER;
836
837 /* Add pointers to enable iwspy support. */
838 priv->wireless_data.spy_data = &priv->spy_data;
839 ndev->wireless_data = &priv->wireless_data;
840
841 /* save the start and end address of the PCI memory area */
842 ndev->mem_start = (unsigned long) priv->device_base;
843 ndev->mem_end = ndev->mem_start + ISL38XX_PCI_MEM_SIZE;
844
845 #if VERBOSE > SHOW_ERROR_MESSAGES
846 DEBUG(SHOW_TRACING, "PCI Memory remapped to 0x%p\n", priv->device_base);
847 #endif
848
849 init_waitqueue_head(&priv->reset_done);
850
851 /* init the queue read locks, process wait counter */
852 sema_init(&priv->mgmt_sem, 1);
853 priv->mgmt_received = NULL;
854 init_waitqueue_head(&priv->mgmt_wqueue);
855 sema_init(&priv->stats_sem, 1);
856 spin_lock_init(&priv->slock);
857
858 /* init state machine with off#1 state */
859 priv->state = PRV_STATE_OFF;
860 priv->state_off = 1;
861
862 /* initialize workqueue's */
863 INIT_WORK(&priv->stats_work, prism54_update_stats);
864 priv->stats_timestamp = 0;
865
866 INIT_WORK(&priv->reset_task, islpci_do_reset_and_wake);
867 priv->reset_task_pending = 0;
868
869 /* allocate various memory areas */
870 if (islpci_alloc_memory(priv))
871 goto do_free_netdev;
872
873 /* select the firmware file depending on the device id */
874 switch (pdev->device) {
875 case 0x3877:
876 strcpy(priv->firmware, ISL3877_IMAGE_FILE);
877 break;
878
879 case 0x3886:
880 strcpy(priv->firmware, ISL3886_IMAGE_FILE);
881 break;
882
883 default:
884 strcpy(priv->firmware, ISL3890_IMAGE_FILE);
885 break;
886 }
887
888 if (register_netdev(ndev)) {
889 DEBUG(SHOW_ERROR_MESSAGES,
890 "ERROR: register_netdev() failed \n");
891 goto do_islpci_free_memory;
892 }
893
894 return ndev;
895
896 do_islpci_free_memory:
897 islpci_free_memory(priv);
898 do_free_netdev:
899 pci_set_drvdata(pdev, NULL);
900 free_netdev(ndev);
901 priv = NULL;
902 return NULL;
903 }
904
905 islpci_state_t
906 islpci_set_state(islpci_private *priv, islpci_state_t new_state)
907 {
908 islpci_state_t old_state;
909
910 /* lock */
911 old_state = priv->state;
912
913 /* this means either a race condition or some serious error in
914 * the driver code */
915 switch (new_state) {
916 case PRV_STATE_OFF:
917 priv->state_off++;
918 default:
919 priv->state = new_state;
920 break;
921
922 case PRV_STATE_PREBOOT:
923 /* there are actually many off-states, enumerated by
924 * state_off */
925 if (old_state == PRV_STATE_OFF)
926 priv->state_off--;
927
928 /* only if hw_unavailable is zero now it means we either
929 * were in off#1 state, or came here from
930 * somewhere else */
931 if (!priv->state_off)
932 priv->state = new_state;
933 break;
934 };
935 #if 0
936 printk(KERN_DEBUG "%s: state transition %d -> %d (off#%d)\n",
937 priv->ndev->name, old_state, new_state, priv->state_off);
938 #endif
939
940 /* invariants */
941 BUG_ON(priv->state_off < 0);
942 BUG_ON(priv->state_off && (priv->state != PRV_STATE_OFF));
943 BUG_ON(!priv->state_off && (priv->state == PRV_STATE_OFF));
944
945 /* unlock */
946 return old_state;
947 }
Linux kernel - Deliverables
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