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/hardirq.h>
22 #include <linux/module.h>
23 #include <linux/slab.h>
24
25 #include <linux/netdevice.h>
26 #include <linux/ethtool.h>
27 #include <linux/pci.h>
28 #include <linux/sched.h>
29 #include <linux/etherdevice.h>
30 #include <linux/delay.h>
31 #include <linux/if_arp.h>
32
33 #include <asm/io.h>
34
35 #include "prismcompat.h"
36 #include "isl_38xx.h"
37 #include "isl_ioctl.h"
38 #include "islpci_dev.h"
39 #include "islpci_mgt.h"
40 #include "islpci_eth.h"
41 #include "oid_mgt.h"
42
43 #define ISL3877_IMAGE_FILE "isl3877"
44 #define ISL3886_IMAGE_FILE "isl3886"
45 #define ISL3890_IMAGE_FILE "isl3890"
46 MODULE_FIRMWARE(ISL3877_IMAGE_FILE);
47 MODULE_FIRMWARE(ISL3886_IMAGE_FILE);
48 MODULE_FIRMWARE(ISL3890_IMAGE_FILE);
49
50 static int prism54_bring_down(islpci_private *);
51 static int islpci_alloc_memory(islpci_private *);
52
53 /* Temporary dummy MAC address to use until firmware is loaded.
54 * The idea there is that some tools (such as nameif) may query
55 * the MAC address before the netdev is 'open'. By using a valid
56 * OUI prefix, they can process the netdev properly.
57 * Of course, this is not the final/real MAC address. It doesn't
58 * matter, as you are suppose to be able to change it anytime via
59 * ndev->set_mac_address. Jean II */
60 static const unsigned char dummy_mac[6] = { 0x00, 0x30, 0xB4, 0x00, 0x00, 0x00 };
61
62 static int
isl_upload_firmware(islpci_private * priv)63 isl_upload_firmware(islpci_private *priv)
64 {
65 u32 reg, rc;
66 void __iomem *device_base = priv->device_base;
67
68 /* clear the RAMBoot and the Reset bit */
69 reg = readl(device_base + ISL38XX_CTRL_STAT_REG);
70 reg &= ~ISL38XX_CTRL_STAT_RESET;
71 reg &= ~ISL38XX_CTRL_STAT_RAMBOOT;
72 writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
73 wmb();
74 udelay(ISL38XX_WRITEIO_DELAY);
75
76 /* set the Reset bit without reading the register ! */
77 reg |= ISL38XX_CTRL_STAT_RESET;
78 writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
79 wmb();
80 udelay(ISL38XX_WRITEIO_DELAY);
81
82 /* clear the Reset bit */
83 reg &= ~ISL38XX_CTRL_STAT_RESET;
84 writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
85 wmb();
86
87 /* wait a while for the device to reboot */
88 mdelay(50);
89
90 {
91 const struct firmware *fw_entry = NULL;
92 long fw_len;
93 const u32 *fw_ptr;
94
95 rc = request_firmware(&fw_entry, priv->firmware, PRISM_FW_PDEV);
96 if (rc) {
97 printk(KERN_ERR
98 "%s: request_firmware() failed for '%s'\n",
99 "prism54", priv->firmware);
100 return rc;
101 }
102 /* prepare the Direct Memory Base register */
103 reg = ISL38XX_DEV_FIRMWARE_ADDRES;
104
105 fw_ptr = (u32 *) fw_entry->data;
106 fw_len = fw_entry->size;
107
108 if (fw_len % 4) {
109 printk(KERN_ERR
110 "%s: firmware '%s' size is not multiple of 32bit, aborting!\n",
111 "prism54", priv->firmware);
112 release_firmware(fw_entry);
113 return -EILSEQ; /* Illegal byte sequence */;
114 }
115
116 while (fw_len > 0) {
117 long _fw_len =
118 (fw_len >
119 ISL38XX_MEMORY_WINDOW_SIZE) ?
120 ISL38XX_MEMORY_WINDOW_SIZE : fw_len;
121 u32 __iomem *dev_fw_ptr = device_base + ISL38XX_DIRECT_MEM_WIN;
122
123 /* set the card's base address for writing the data */
124 isl38xx_w32_flush(device_base, reg,
125 ISL38XX_DIR_MEM_BASE_REG);
126 wmb(); /* be paranoid */
127
128 /* increment the write address for next iteration */
129 reg += _fw_len;
130 fw_len -= _fw_len;
131
132 /* write the data to the Direct Memory Window 32bit-wise */
133 /* memcpy_toio() doesn't guarantee 32bit writes :-| */
134 while (_fw_len > 0) {
135 /* use non-swapping writel() */
136 __raw_writel(*fw_ptr, dev_fw_ptr);
137 fw_ptr++, dev_fw_ptr++;
138 _fw_len -= 4;
139 }
140
141 /* flush PCI posting */
142 (void) readl(device_base + ISL38XX_PCI_POSTING_FLUSH);
143 wmb(); /* be paranoid again */
144
145 BUG_ON(_fw_len != 0);
146 }
147
148 BUG_ON(fw_len != 0);
149
150 /* Firmware version is at offset 40 (also for "newmac") */
151 printk(KERN_DEBUG "%s: firmware version: %.8s\n",
152 priv->ndev->name, fw_entry->data + 40);
153
154 release_firmware(fw_entry);
155 }
156
157 /* now reset the device
158 * clear the Reset & ClkRun bit, set the RAMBoot bit */
159 reg = readl(device_base + ISL38XX_CTRL_STAT_REG);
160 reg &= ~ISL38XX_CTRL_STAT_CLKRUN;
161 reg &= ~ISL38XX_CTRL_STAT_RESET;
162 reg |= ISL38XX_CTRL_STAT_RAMBOOT;
163 isl38xx_w32_flush(device_base, reg, ISL38XX_CTRL_STAT_REG);
164 wmb();
165 udelay(ISL38XX_WRITEIO_DELAY);
166
167 /* set the reset bit latches the host override and RAMBoot bits
168 * into the device for operation when the reset bit is reset */
169 reg |= ISL38XX_CTRL_STAT_RESET;
170 writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
171 /* don't do flush PCI posting here! */
172 wmb();
173 udelay(ISL38XX_WRITEIO_DELAY);
174
175 /* clear the reset bit should start the whole circus */
176 reg &= ~ISL38XX_CTRL_STAT_RESET;
177 writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
178 /* don't do flush PCI posting here! */
179 wmb();
180 udelay(ISL38XX_WRITEIO_DELAY);
181
182 return 0;
183 }
184
185 /******************************************************************************
186 Device Interrupt Handler
187 ******************************************************************************/
188
189 irqreturn_t
islpci_interrupt(int irq,void * config)190 islpci_interrupt(int irq, void *config)
191 {
192 u32 reg;
193 islpci_private *priv = config;
194 struct net_device *ndev = priv->ndev;
195 void __iomem *device = priv->device_base;
196 int powerstate = ISL38XX_PSM_POWERSAVE_STATE;
197
198 /* lock the interrupt handler */
199 spin_lock(&priv->slock);
200
201 /* received an interrupt request on a shared IRQ line
202 * first check whether the device is in sleep mode */
203 reg = readl(device + ISL38XX_CTRL_STAT_REG);
204 if (reg & ISL38XX_CTRL_STAT_SLEEPMODE)
205 /* device is in sleep mode, IRQ was generated by someone else */
206 {
207 #if VERBOSE > SHOW_ERROR_MESSAGES
208 DEBUG(SHOW_TRACING, "Assuming someone else called the IRQ\n");
209 #endif
210 spin_unlock(&priv->slock);
211 return IRQ_NONE;
212 }
213
214
215 /* check whether there is any source of interrupt on the device */
216 reg = readl(device + ISL38XX_INT_IDENT_REG);
217
218 /* also check the contents of the Interrupt Enable Register, because this
219 * will filter out interrupt sources from other devices on the same irq ! */
220 reg &= readl(device + ISL38XX_INT_EN_REG);
221 reg &= ISL38XX_INT_SOURCES;
222
223 if (reg != 0) {
224 if (islpci_get_state(priv) != PRV_STATE_SLEEP)
225 powerstate = ISL38XX_PSM_ACTIVE_STATE;
226
227 /* reset the request bits in the Identification register */
228 isl38xx_w32_flush(device, reg, ISL38XX_INT_ACK_REG);
229
230 #if VERBOSE > SHOW_ERROR_MESSAGES
231 DEBUG(SHOW_FUNCTION_CALLS,
232 "IRQ: Identification register 0x%p 0x%x\n", device, reg);
233 #endif
234
235 /* check for each bit in the register separately */
236 if (reg & ISL38XX_INT_IDENT_UPDATE) {
237 #if VERBOSE > SHOW_ERROR_MESSAGES
238 /* Queue has been updated */
239 DEBUG(SHOW_TRACING, "IRQ: Update flag\n");
240
241 DEBUG(SHOW_QUEUE_INDEXES,
242 "CB drv Qs: [%i][%i][%i][%i][%i][%i]\n",
243 le32_to_cpu(priv->control_block->
244 driver_curr_frag[0]),
245 le32_to_cpu(priv->control_block->
246 driver_curr_frag[1]),
247 le32_to_cpu(priv->control_block->
248 driver_curr_frag[2]),
249 le32_to_cpu(priv->control_block->
250 driver_curr_frag[3]),
251 le32_to_cpu(priv->control_block->
252 driver_curr_frag[4]),
253 le32_to_cpu(priv->control_block->
254 driver_curr_frag[5])
255 );
256
257 DEBUG(SHOW_QUEUE_INDEXES,
258 "CB dev Qs: [%i][%i][%i][%i][%i][%i]\n",
259 le32_to_cpu(priv->control_block->
260 device_curr_frag[0]),
261 le32_to_cpu(priv->control_block->
262 device_curr_frag[1]),
263 le32_to_cpu(priv->control_block->
264 device_curr_frag[2]),
265 le32_to_cpu(priv->control_block->
266 device_curr_frag[3]),
267 le32_to_cpu(priv->control_block->
268 device_curr_frag[4]),
269 le32_to_cpu(priv->control_block->
270 device_curr_frag[5])
271 );
272 #endif
273
274 /* cleanup the data low transmit queue */
275 islpci_eth_cleanup_transmit(priv, priv->control_block);
276
277 /* device is in active state, update the
278 * powerstate flag if necessary */
279 powerstate = ISL38XX_PSM_ACTIVE_STATE;
280
281 /* check all three queues in priority order
282 * call the PIMFOR receive function until the
283 * queue is empty */
284 if (isl38xx_in_queue(priv->control_block,
285 ISL38XX_CB_RX_MGMTQ) != 0) {
286 #if VERBOSE > SHOW_ERROR_MESSAGES
287 DEBUG(SHOW_TRACING,
288 "Received frame in Management Queue\n");
289 #endif
290 islpci_mgt_receive(ndev);
291
292 islpci_mgt_cleanup_transmit(ndev);
293
294 /* Refill slots in receive queue */
295 islpci_mgmt_rx_fill(ndev);
296
297 /* no need to trigger the device, next
298 islpci_mgt_transaction does it */
299 }
300
301 while (isl38xx_in_queue(priv->control_block,
302 ISL38XX_CB_RX_DATA_LQ) != 0) {
303 #if VERBOSE > SHOW_ERROR_MESSAGES
304 DEBUG(SHOW_TRACING,
305 "Received frame in Data Low Queue\n");
306 #endif
307 islpci_eth_receive(priv);
308 }
309
310 /* check whether the data transmit queues were full */
311 if (priv->data_low_tx_full) {
312 /* check whether the transmit is not full anymore */
313 if (ISL38XX_CB_TX_QSIZE -
314 isl38xx_in_queue(priv->control_block,
315 ISL38XX_CB_TX_DATA_LQ) >=
316 ISL38XX_MIN_QTHRESHOLD) {
317 /* nope, the driver is ready for more network frames */
318 netif_wake_queue(priv->ndev);
319
320 /* reset the full flag */
321 priv->data_low_tx_full = 0;
322 }
323 }
324 }
325
326 if (reg & ISL38XX_INT_IDENT_INIT) {
327 /* Device has been initialized */
328 #if VERBOSE > SHOW_ERROR_MESSAGES
329 DEBUG(SHOW_TRACING,
330 "IRQ: Init flag, device initialized\n");
331 #endif
332 wake_up(&priv->reset_done);
333 }
334
335 if (reg & ISL38XX_INT_IDENT_SLEEP) {
336 /* Device intends to move to powersave state */
337 #if VERBOSE > SHOW_ERROR_MESSAGES
338 DEBUG(SHOW_TRACING, "IRQ: Sleep flag\n");
339 #endif
340 isl38xx_handle_sleep_request(priv->control_block,
341 &powerstate,
342 priv->device_base);
343 }
344
345 if (reg & ISL38XX_INT_IDENT_WAKEUP) {
346 /* Device has been woken up to active state */
347 #if VERBOSE > SHOW_ERROR_MESSAGES
348 DEBUG(SHOW_TRACING, "IRQ: Wakeup flag\n");
349 #endif
350
351 isl38xx_handle_wakeup(priv->control_block,
352 &powerstate, priv->device_base);
353 }
354 } else {
355 #if VERBOSE > SHOW_ERROR_MESSAGES
356 DEBUG(SHOW_TRACING, "Assuming someone else called the IRQ\n");
357 #endif
358 spin_unlock(&priv->slock);
359 return IRQ_NONE;
360 }
361
362 /* sleep -> ready */
363 if (islpci_get_state(priv) == PRV_STATE_SLEEP
364 && powerstate == ISL38XX_PSM_ACTIVE_STATE)
365 islpci_set_state(priv, PRV_STATE_READY);
366
367 /* !sleep -> sleep */
368 if (islpci_get_state(priv) != PRV_STATE_SLEEP
369 && powerstate == ISL38XX_PSM_POWERSAVE_STATE)
370 islpci_set_state(priv, PRV_STATE_SLEEP);
371
372 /* unlock the interrupt handler */
373 spin_unlock(&priv->slock);
374
375 return IRQ_HANDLED;
376 }
377
378 /******************************************************************************
379 Network Interface Control & Statistical functions
380 ******************************************************************************/
381 static int
islpci_open(struct net_device * ndev)382 islpci_open(struct net_device *ndev)
383 {
384 u32 rc;
385 islpci_private *priv = netdev_priv(ndev);
386
387 /* reset data structures, upload firmware and reset device */
388 rc = islpci_reset(priv,1);
389 if (rc) {
390 prism54_bring_down(priv);
391 return rc; /* Returns informative message */
392 }
393
394 netif_start_queue(ndev);
395
396 /* Turn off carrier if in STA or Ad-hoc mode. It will be turned on
397 * once the firmware receives a trap of being associated
398 * (GEN_OID_LINKSTATE). In other modes (AP or WDS or monitor) we
399 * should just leave the carrier on as its expected the firmware
400 * won't send us a trigger. */
401 if (priv->iw_mode == IW_MODE_INFRA || priv->iw_mode == IW_MODE_ADHOC)
402 netif_carrier_off(ndev);
403 else
404 netif_carrier_on(ndev);
405
406 return 0;
407 }
408
409 static int
islpci_close(struct net_device * ndev)410 islpci_close(struct net_device *ndev)
411 {
412 islpci_private *priv = netdev_priv(ndev);
413
414 printk(KERN_DEBUG "%s: islpci_close ()\n", ndev->name);
415
416 netif_stop_queue(ndev);
417
418 return prism54_bring_down(priv);
419 }
420
421 static int
prism54_bring_down(islpci_private * priv)422 prism54_bring_down(islpci_private *priv)
423 {
424 void __iomem *device_base = priv->device_base;
425 u32 reg;
426 /* we are going to shutdown the device */
427 islpci_set_state(priv, PRV_STATE_PREBOOT);
428
429 /* disable all device interrupts in case they weren't */
430 isl38xx_disable_interrupts(priv->device_base);
431
432 /* For safety reasons, we may want to ensure that no DMA transfer is
433 * currently in progress by emptying the TX and RX queues. */
434
435 /* wait until interrupts have finished executing on other CPUs */
436 synchronize_irq(priv->pdev->irq);
437
438 reg = readl(device_base + ISL38XX_CTRL_STAT_REG);
439 reg &= ~(ISL38XX_CTRL_STAT_RESET | ISL38XX_CTRL_STAT_RAMBOOT);
440 writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
441 wmb();
442 udelay(ISL38XX_WRITEIO_DELAY);
443
444 reg |= ISL38XX_CTRL_STAT_RESET;
445 writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
446 wmb();
447 udelay(ISL38XX_WRITEIO_DELAY);
448
449 /* clear the Reset bit */
450 reg &= ~ISL38XX_CTRL_STAT_RESET;
451 writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
452 wmb();
453
454 /* wait a while for the device to reset */
455 schedule_timeout_uninterruptible(msecs_to_jiffies(50));
456
457 return 0;
458 }
459
460 static int
islpci_upload_fw(islpci_private * priv)461 islpci_upload_fw(islpci_private *priv)
462 {
463 islpci_state_t old_state;
464 u32 rc;
465
466 old_state = islpci_set_state(priv, PRV_STATE_BOOT);
467
468 printk(KERN_DEBUG "%s: uploading firmware...\n", priv->ndev->name);
469
470 rc = isl_upload_firmware(priv);
471 if (rc) {
472 /* error uploading the firmware */
473 printk(KERN_ERR "%s: could not upload firmware ('%s')\n",
474 priv->ndev->name, priv->firmware);
475
476 islpci_set_state(priv, old_state);
477 return rc;
478 }
479
480 printk(KERN_DEBUG "%s: firmware upload complete\n",
481 priv->ndev->name);
482
483 islpci_set_state(priv, PRV_STATE_POSTBOOT);
484
485 return 0;
486 }
487
488 static int
islpci_reset_if(islpci_private * priv)489 islpci_reset_if(islpci_private *priv)
490 {
491 long remaining;
492 int result = -ETIME;
493 int count;
494
495 DEFINE_WAIT(wait);
496 prepare_to_wait(&priv->reset_done, &wait, TASK_UNINTERRUPTIBLE);
497
498 /* now the last step is to reset the interface */
499 isl38xx_interface_reset(priv->device_base, priv->device_host_address);
500 islpci_set_state(priv, PRV_STATE_PREINIT);
501
502 for(count = 0; count < 2 && result; count++) {
503 /* The software reset acknowledge needs about 220 msec here.
504 * Be conservative and wait for up to one second. */
505
506 remaining = schedule_timeout_uninterruptible(HZ);
507
508 if(remaining > 0) {
509 result = 0;
510 break;
511 }
512
513 /* If we're here it's because our IRQ hasn't yet gone through.
514 * Retry a bit more...
515 */
516 printk(KERN_ERR "%s: no 'reset complete' IRQ seen - retrying\n",
517 priv->ndev->name);
518 }
519
520 finish_wait(&priv->reset_done, &wait);
521
522 if (result) {
523 printk(KERN_ERR "%s: interface reset failure\n", priv->ndev->name);
524 return result;
525 }
526
527 islpci_set_state(priv, PRV_STATE_INIT);
528
529 /* Now that the device is 100% up, let's allow
530 * for the other interrupts --
531 * NOTE: this is not *yet* true since we've only allowed the
532 * INIT interrupt on the IRQ line. We can perhaps poll
533 * the IRQ line until we know for sure the reset went through */
534 isl38xx_enable_common_interrupts(priv->device_base);
535
536 down_write(&priv->mib_sem);
537 result = mgt_commit(priv);
538 if (result) {
539 printk(KERN_ERR "%s: interface reset failure\n", priv->ndev->name);
540 up_write(&priv->mib_sem);
541 return result;
542 }
543 up_write(&priv->mib_sem);
544
545 islpci_set_state(priv, PRV_STATE_READY);
546
547 printk(KERN_DEBUG "%s: interface reset complete\n", priv->ndev->name);
548 return 0;
549 }
550
551 int
islpci_reset(islpci_private * priv,int reload_firmware)552 islpci_reset(islpci_private *priv, int reload_firmware)
553 {
554 isl38xx_control_block *cb = /* volatile not needed */
555 (isl38xx_control_block *) priv->control_block;
556 unsigned counter;
557 int rc;
558
559 if (reload_firmware)
560 islpci_set_state(priv, PRV_STATE_PREBOOT);
561 else
562 islpci_set_state(priv, PRV_STATE_POSTBOOT);
563
564 printk(KERN_DEBUG "%s: resetting device...\n", priv->ndev->name);
565
566 /* disable all device interrupts in case they weren't */
567 isl38xx_disable_interrupts(priv->device_base);
568
569 /* flush all management queues */
570 priv->index_mgmt_tx = 0;
571 priv->index_mgmt_rx = 0;
572
573 /* clear the indexes in the frame pointer */
574 for (counter = 0; counter < ISL38XX_CB_QCOUNT; counter++) {
575 cb->driver_curr_frag[counter] = cpu_to_le32(0);
576 cb->device_curr_frag[counter] = cpu_to_le32(0);
577 }
578
579 /* reset the mgmt receive queue */
580 for (counter = 0; counter < ISL38XX_CB_MGMT_QSIZE; counter++) {
581 isl38xx_fragment *frag = &cb->rx_data_mgmt[counter];
582 frag->size = cpu_to_le16(MGMT_FRAME_SIZE);
583 frag->flags = 0;
584 frag->address = cpu_to_le32(priv->mgmt_rx[counter].pci_addr);
585 }
586
587 for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) {
588 cb->rx_data_low[counter].address =
589 cpu_to_le32((u32) priv->pci_map_rx_address[counter]);
590 }
591
592 /* since the receive queues are filled with empty fragments, now we can
593 * set the corresponding indexes in the Control Block */
594 priv->control_block->driver_curr_frag[ISL38XX_CB_RX_DATA_LQ] =
595 cpu_to_le32(ISL38XX_CB_RX_QSIZE);
596 priv->control_block->driver_curr_frag[ISL38XX_CB_RX_MGMTQ] =
597 cpu_to_le32(ISL38XX_CB_MGMT_QSIZE);
598
599 /* reset the remaining real index registers and full flags */
600 priv->free_data_rx = 0;
601 priv->free_data_tx = 0;
602 priv->data_low_tx_full = 0;
603
604 if (reload_firmware) { /* Should we load the firmware ? */
605 /* now that the data structures are cleaned up, upload
606 * firmware and reset interface */
607 rc = islpci_upload_fw(priv);
608 if (rc) {
609 printk(KERN_ERR "%s: islpci_reset: failure\n",
610 priv->ndev->name);
611 return rc;
612 }
613 }
614
615 /* finally reset interface */
616 rc = islpci_reset_if(priv);
617 if (rc)
618 printk(KERN_ERR "prism54: Your card/socket may be faulty, or IRQ line too busy :(\n");
619 return rc;
620 }
621
622 /******************************************************************************
623 Network device configuration functions
624 ******************************************************************************/
625 static int
islpci_alloc_memory(islpci_private * priv)626 islpci_alloc_memory(islpci_private *priv)
627 {
628 int counter;
629
630 #if VERBOSE > SHOW_ERROR_MESSAGES
631 printk(KERN_DEBUG "islpci_alloc_memory\n");
632 #endif
633
634 /* remap the PCI device base address to accessible */
635 if (!(priv->device_base =
636 ioremap(pci_resource_start(priv->pdev, 0),
637 ISL38XX_PCI_MEM_SIZE))) {
638 /* error in remapping the PCI device memory address range */
639 printk(KERN_ERR "PCI memory remapping failed\n");
640 return -1;
641 }
642
643 /* memory layout for consistent DMA region:
644 *
645 * Area 1: Control Block for the device interface
646 * Area 2: Power Save Mode Buffer for temporary frame storage. Be aware that
647 * the number of supported stations in the AP determines the minimal
648 * size of the buffer !
649 */
650
651 /* perform the allocation */
652 priv->driver_mem_address = pci_alloc_consistent(priv->pdev,
653 HOST_MEM_BLOCK,
654 &priv->
655 device_host_address);
656
657 if (!priv->driver_mem_address) {
658 /* error allocating the block of PCI memory */
659 printk(KERN_ERR "%s: could not allocate DMA memory, aborting!",
660 "prism54");
661 return -1;
662 }
663
664 /* assign the Control Block to the first address of the allocated area */
665 priv->control_block =
666 (isl38xx_control_block *) priv->driver_mem_address;
667
668 /* set the Power Save Buffer pointer directly behind the CB */
669 priv->device_psm_buffer =
670 priv->device_host_address + CONTROL_BLOCK_SIZE;
671
672 /* make sure all buffer pointers are initialized */
673 for (counter = 0; counter < ISL38XX_CB_QCOUNT; counter++) {
674 priv->control_block->driver_curr_frag[counter] = cpu_to_le32(0);
675 priv->control_block->device_curr_frag[counter] = cpu_to_le32(0);
676 }
677
678 priv->index_mgmt_rx = 0;
679 memset(priv->mgmt_rx, 0, sizeof(priv->mgmt_rx));
680 memset(priv->mgmt_tx, 0, sizeof(priv->mgmt_tx));
681
682 /* allocate rx queue for management frames */
683 if (islpci_mgmt_rx_fill(priv->ndev) < 0)
684 goto out_free;
685
686 /* now get the data rx skb's */
687 memset(priv->data_low_rx, 0, sizeof (priv->data_low_rx));
688 memset(priv->pci_map_rx_address, 0, sizeof (priv->pci_map_rx_address));
689
690 for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) {
691 struct sk_buff *skb;
692
693 /* allocate an sk_buff for received data frames storage
694 * each frame on receive size consists of 1 fragment
695 * include any required allignment operations */
696 if (!(skb = dev_alloc_skb(MAX_FRAGMENT_SIZE_RX + 2))) {
697 /* error allocating an sk_buff structure elements */
698 printk(KERN_ERR "Error allocating skb.\n");
699 skb = NULL;
700 goto out_free;
701 }
702 skb_reserve(skb, (4 - (long) skb->data) & 0x03);
703 /* add the new allocated sk_buff to the buffer array */
704 priv->data_low_rx[counter] = skb;
705
706 /* map the allocated skb data area to pci */
707 priv->pci_map_rx_address[counter] =
708 pci_map_single(priv->pdev, (void *) skb->data,
709 MAX_FRAGMENT_SIZE_RX + 2,
710 PCI_DMA_FROMDEVICE);
711 if (!priv->pci_map_rx_address[counter]) {
712 /* error mapping the buffer to device
713 accessible memory address */
714 printk(KERN_ERR "failed to map skb DMA'able\n");
715 goto out_free;
716 }
717 }
718
719 prism54_acl_init(&priv->acl);
720 prism54_wpa_bss_ie_init(priv);
721 if (mgt_init(priv))
722 goto out_free;
723
724 return 0;
725 out_free:
726 islpci_free_memory(priv);
727 return -1;
728 }
729
730 int
islpci_free_memory(islpci_private * priv)731 islpci_free_memory(islpci_private *priv)
732 {
733 int counter;
734
735 if (priv->device_base)
736 iounmap(priv->device_base);
737 priv->device_base = NULL;
738
739 /* free consistent DMA area... */
740 if (priv->driver_mem_address)
741 pci_free_consistent(priv->pdev, HOST_MEM_BLOCK,
742 priv->driver_mem_address,
743 priv->device_host_address);
744
745 /* clear some dangling pointers */
746 priv->driver_mem_address = NULL;
747 priv->device_host_address = 0;
748 priv->device_psm_buffer = 0;
749 priv->control_block = NULL;
750
751 /* clean up mgmt rx buffers */
752 for (counter = 0; counter < ISL38XX_CB_MGMT_QSIZE; counter++) {
753 struct islpci_membuf *buf = &priv->mgmt_rx[counter];
754 if (buf->pci_addr)
755 pci_unmap_single(priv->pdev, buf->pci_addr,
756 buf->size, PCI_DMA_FROMDEVICE);
757 buf->pci_addr = 0;
758 kfree(buf->mem);
759 buf->size = 0;
760 buf->mem = NULL;
761 }
762
763 /* clean up data rx buffers */
764 for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) {
765 if (priv->pci_map_rx_address[counter])
766 pci_unmap_single(priv->pdev,
767 priv->pci_map_rx_address[counter],
768 MAX_FRAGMENT_SIZE_RX + 2,
769 PCI_DMA_FROMDEVICE);
770 priv->pci_map_rx_address[counter] = 0;
771
772 if (priv->data_low_rx[counter])
773 dev_kfree_skb(priv->data_low_rx[counter]);
774 priv->data_low_rx[counter] = NULL;
775 }
776
777 /* Free the access control list and the WPA list */
778 prism54_acl_clean(&priv->acl);
779 prism54_wpa_bss_ie_clean(priv);
780 mgt_clean(priv);
781
782 return 0;
783 }
784
785 #if 0
786 static void
787 islpci_set_multicast_list(struct net_device *dev)
788 {
789 /* put device into promisc mode and let network layer handle it */
790 }
791 #endif
792
islpci_ethtool_get_drvinfo(struct net_device * dev,struct ethtool_drvinfo * info)793 static void islpci_ethtool_get_drvinfo(struct net_device *dev,
794 struct ethtool_drvinfo *info)
795 {
796 strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
797 strlcpy(info->version, DRV_VERSION, sizeof(info->version));
798 }
799
800 static const struct ethtool_ops islpci_ethtool_ops = {
801 .get_drvinfo = islpci_ethtool_get_drvinfo,
802 };
803
804 static const struct net_device_ops islpci_netdev_ops = {
805 .ndo_open = islpci_open,
806 .ndo_stop = islpci_close,
807 .ndo_start_xmit = islpci_eth_transmit,
808 .ndo_tx_timeout = islpci_eth_tx_timeout,
809 .ndo_set_mac_address = prism54_set_mac_address,
810 .ndo_change_mtu = eth_change_mtu,
811 .ndo_validate_addr = eth_validate_addr,
812 };
813
814 static struct device_type wlan_type = {
815 .name = "wlan",
816 };
817
818 struct net_device *
islpci_setup(struct pci_dev * pdev)819 islpci_setup(struct pci_dev *pdev)
820 {
821 islpci_private *priv;
822 struct net_device *ndev = alloc_etherdev(sizeof (islpci_private));
823
824 if (!ndev)
825 return ndev;
826
827 pci_set_drvdata(pdev, ndev);
828 SET_NETDEV_DEV(ndev, &pdev->dev);
829 SET_NETDEV_DEVTYPE(ndev, &wlan_type);
830
831 /* setup the structure members */
832 ndev->base_addr = pci_resource_start(pdev, 0);
833 ndev->irq = pdev->irq;
834
835 /* initialize the function pointers */
836 ndev->netdev_ops = &islpci_netdev_ops;
837 ndev->wireless_handlers = &prism54_handler_def;
838 ndev->ethtool_ops = &islpci_ethtool_ops;
839
840 /* ndev->set_multicast_list = &islpci_set_multicast_list; */
841 ndev->addr_len = ETH_ALEN;
842 /* Get a non-zero dummy MAC address for nameif. Jean II */
843 memcpy(ndev->dev_addr, dummy_mac, 6);
844
845 ndev->watchdog_timeo = ISLPCI_TX_TIMEOUT;
846
847 /* allocate a private device structure to the network device */
848 priv = netdev_priv(ndev);
849 priv->ndev = ndev;
850 priv->pdev = pdev;
851 priv->monitor_type = ARPHRD_IEEE80211;
852 priv->ndev->type = (priv->iw_mode == IW_MODE_MONITOR) ?
853 priv->monitor_type : ARPHRD_ETHER;
854
855 /* Add pointers to enable iwspy support. */
856 priv->wireless_data.spy_data = &priv->spy_data;
857 ndev->wireless_data = &priv->wireless_data;
858
859 /* save the start and end address of the PCI memory area */
860 ndev->mem_start = (unsigned long) priv->device_base;
861 ndev->mem_end = ndev->mem_start + ISL38XX_PCI_MEM_SIZE;
862
863 #if VERBOSE > SHOW_ERROR_MESSAGES
864 DEBUG(SHOW_TRACING, "PCI Memory remapped to 0x%p\n", priv->device_base);
865 #endif
866
867 init_waitqueue_head(&priv->reset_done);
868
869 /* init the queue read locks, process wait counter */
870 mutex_init(&priv->mgmt_lock);
871 priv->mgmt_received = NULL;
872 init_waitqueue_head(&priv->mgmt_wqueue);
873 mutex_init(&priv->stats_lock);
874 spin_lock_init(&priv->slock);
875
876 /* init state machine with off#1 state */
877 priv->state = PRV_STATE_OFF;
878 priv->state_off = 1;
879
880 /* initialize workqueue's */
881 INIT_WORK(&priv->stats_work, prism54_update_stats);
882 priv->stats_timestamp = 0;
883
884 INIT_WORK(&priv->reset_task, islpci_do_reset_and_wake);
885 priv->reset_task_pending = 0;
886
887 /* allocate various memory areas */
888 if (islpci_alloc_memory(priv))
889 goto do_free_netdev;
890
891 /* select the firmware file depending on the device id */
892 switch (pdev->device) {
893 case 0x3877:
894 strcpy(priv->firmware, ISL3877_IMAGE_FILE);
895 break;
896
897 case 0x3886:
898 strcpy(priv->firmware, ISL3886_IMAGE_FILE);
899 break;
900
901 default:
902 strcpy(priv->firmware, ISL3890_IMAGE_FILE);
903 break;
904 }
905
906 if (register_netdev(ndev)) {
907 DEBUG(SHOW_ERROR_MESSAGES,
908 "ERROR: register_netdev() failed\n");
909 goto do_islpci_free_memory;
910 }
911
912 return ndev;
913
914 do_islpci_free_memory:
915 islpci_free_memory(priv);
916 do_free_netdev:
917 pci_set_drvdata(pdev, NULL);
918 free_netdev(ndev);
919 priv = NULL;
920 return NULL;
921 }
922
923 islpci_state_t
islpci_set_state(islpci_private * priv,islpci_state_t new_state)924 islpci_set_state(islpci_private *priv, islpci_state_t new_state)
925 {
926 islpci_state_t old_state;
927
928 /* lock */
929 old_state = priv->state;
930
931 /* this means either a race condition or some serious error in
932 * the driver code */
933 switch (new_state) {
934 case PRV_STATE_OFF:
935 priv->state_off++;
936 default:
937 priv->state = new_state;
938 break;
939
940 case PRV_STATE_PREBOOT:
941 /* there are actually many off-states, enumerated by
942 * state_off */
943 if (old_state == PRV_STATE_OFF)
944 priv->state_off--;
945
946 /* only if hw_unavailable is zero now it means we either
947 * were in off#1 state, or came here from
948 * somewhere else */
949 if (!priv->state_off)
950 priv->state = new_state;
951 break;
952 }
953 #if 0
954 printk(KERN_DEBUG "%s: state transition %d -> %d (off#%d)\n",
955 priv->ndev->name, old_state, new_state, priv->state_off);
956 #endif
957
958 /* invariants */
959 BUG_ON(priv->state_off < 0);
960 BUG_ON(priv->state_off && (priv->state != PRV_STATE_OFF));
961 BUG_ON(!priv->state_off && (priv->state == PRV_STATE_OFF));
962
963 /* unlock */
964 return old_state;
965 }
966