1// SPDX-License-Identifier: GPL-2.0-only 2/* 3 * Copyright (C) 2002 Intersil Americas Inc. 4 * Copyright (C) 2003 Herbert Valerio Riedel <hvr@gnu.org> 5 * Copyright (C) 2003 Luis R. Rodriguez <mcgrof@ruslug.rutgers.edu> 6 */ 7 8#include <linux/hardirq.h> 9#include <linux/module.h> 10#include <linux/slab.h> 11 12#include <linux/netdevice.h> 13#include <linux/ethtool.h> 14#include <linux/pci.h> 15#include <linux/sched.h> 16#include <linux/etherdevice.h> 17#include <linux/delay.h> 18#include <linux/if_arp.h> 19 20#include <asm/io.h> 21 22#include "prismcompat.h" 23#include "isl_38xx.h" 24#include "isl_ioctl.h" 25#include "islpci_dev.h" 26#include "islpci_mgt.h" 27#include "islpci_eth.h" 28#include "oid_mgt.h" 29 30#define ISL3877_IMAGE_FILE "isl3877" 31#define ISL3886_IMAGE_FILE "isl3886" 32#define ISL3890_IMAGE_FILE "isl3890" 33MODULE_FIRMWARE(ISL3877_IMAGE_FILE); 34MODULE_FIRMWARE(ISL3886_IMAGE_FILE); 35MODULE_FIRMWARE(ISL3890_IMAGE_FILE); 36 37static int prism54_bring_down(islpci_private *); 38static int islpci_alloc_memory(islpci_private *); 39 40/* Temporary dummy MAC address to use until firmware is loaded. 41 * The idea there is that some tools (such as nameif) may query 42 * the MAC address before the netdev is 'open'. By using a valid 43 * OUI prefix, they can process the netdev properly. 44 * Of course, this is not the final/real MAC address. It doesn't 45 * matter, as you are suppose to be able to change it anytime via 46 * ndev->set_mac_address. Jean II */ 47static const unsigned char dummy_mac[6] = { 0x00, 0x30, 0xB4, 0x00, 0x00, 0x00 }; 48 49static int 50isl_upload_firmware(islpci_private *priv) 51{ 52 u32 reg, rc; 53 void __iomem *device_base = priv->device_base; 54 55 /* clear the RAMBoot and the Reset bit */ 56 reg = readl(device_base + ISL38XX_CTRL_STAT_REG); 57 reg &= ~ISL38XX_CTRL_STAT_RESET; 58 reg &= ~ISL38XX_CTRL_STAT_RAMBOOT; 59 writel(reg, device_base + ISL38XX_CTRL_STAT_REG); 60 wmb(); 61 udelay(ISL38XX_WRITEIO_DELAY); 62 63 /* set the Reset bit without reading the register ! */ 64 reg |= ISL38XX_CTRL_STAT_RESET; 65 writel(reg, device_base + ISL38XX_CTRL_STAT_REG); 66 wmb(); 67 udelay(ISL38XX_WRITEIO_DELAY); 68 69 /* clear the Reset bit */ 70 reg &= ~ISL38XX_CTRL_STAT_RESET; 71 writel(reg, device_base + ISL38XX_CTRL_STAT_REG); 72 wmb(); 73 74 /* wait a while for the device to reboot */ 75 mdelay(50); 76 77 { 78 const struct firmware *fw_entry = NULL; 79 long fw_len; 80 const u32 *fw_ptr; 81 82 rc = request_firmware(&fw_entry, priv->firmware, PRISM_FW_PDEV); 83 if (rc) { 84 printk(KERN_ERR 85 "%s: request_firmware() failed for '%s'\n", 86 "prism54", priv->firmware); 87 return rc; 88 } 89 /* prepare the Direct Memory Base register */ 90 reg = ISL38XX_DEV_FIRMWARE_ADDRES; 91 92 fw_ptr = (u32 *) fw_entry->data; 93 fw_len = fw_entry->size; 94 95 if (fw_len % 4) { 96 printk(KERN_ERR 97 "%s: firmware '%s' size is not multiple of 32bit, aborting!\n", 98 "prism54", priv->firmware); 99 release_firmware(fw_entry); 100 return -EILSEQ; /* Illegal byte sequence */; 101 } 102 103 while (fw_len > 0) { 104 long _fw_len = 105 (fw_len > 106 ISL38XX_MEMORY_WINDOW_SIZE) ? 107 ISL38XX_MEMORY_WINDOW_SIZE : fw_len; 108 u32 __iomem *dev_fw_ptr = device_base + ISL38XX_DIRECT_MEM_WIN; 109 110 /* set the card's base address for writing the data */ 111 isl38xx_w32_flush(device_base, reg, 112 ISL38XX_DIR_MEM_BASE_REG); 113 wmb(); /* be paranoid */ 114 115 /* increment the write address for next iteration */ 116 reg += _fw_len; 117 fw_len -= _fw_len; 118 119 /* write the data to the Direct Memory Window 32bit-wise */ 120 /* memcpy_toio() doesn't guarantee 32bit writes :-| */ 121 while (_fw_len > 0) { 122 /* use non-swapping writel() */ 123 __raw_writel(*fw_ptr, dev_fw_ptr); 124 fw_ptr++, dev_fw_ptr++; 125 _fw_len -= 4; 126 } 127 128 /* flush PCI posting */ 129 (void) readl(device_base + ISL38XX_PCI_POSTING_FLUSH); 130 wmb(); /* be paranoid again */ 131 132 BUG_ON(_fw_len != 0); 133 } 134 135 BUG_ON(fw_len != 0); 136 137 /* Firmware version is at offset 40 (also for "newmac") */ 138 printk(KERN_DEBUG "%s: firmware version: %.8s\n", 139 priv->ndev->name, fw_entry->data + 40); 140 141 release_firmware(fw_entry); 142 } 143 144 /* now reset the device 145 * clear the Reset & ClkRun bit, set the RAMBoot bit */ 146 reg = readl(device_base + ISL38XX_CTRL_STAT_REG); 147 reg &= ~ISL38XX_CTRL_STAT_CLKRUN; 148 reg &= ~ISL38XX_CTRL_STAT_RESET; 149 reg |= ISL38XX_CTRL_STAT_RAMBOOT; 150 isl38xx_w32_flush(device_base, reg, ISL38XX_CTRL_STAT_REG); 151 wmb(); 152 udelay(ISL38XX_WRITEIO_DELAY); 153 154 /* set the reset bit latches the host override and RAMBoot bits 155 * into the device for operation when the reset bit is reset */ 156 reg |= ISL38XX_CTRL_STAT_RESET; 157 writel(reg, device_base + ISL38XX_CTRL_STAT_REG); 158 /* don't do flush PCI posting here! */ 159 wmb(); 160 udelay(ISL38XX_WRITEIO_DELAY); 161 162 /* clear the reset bit should start the whole circus */ 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 return 0; 170} 171 172/****************************************************************************** 173 Device Interrupt Handler 174******************************************************************************/ 175 176irqreturn_t 177islpci_interrupt(int irq, void *config) 178{ 179 u32 reg; 180 islpci_private *priv = config; 181 struct net_device *ndev = priv->ndev; 182 void __iomem *device = priv->device_base; 183 int powerstate = ISL38XX_PSM_POWERSAVE_STATE; 184 185 /* lock the interrupt handler */ 186 spin_lock(&priv->slock); 187 188 /* received an interrupt request on a shared IRQ line 189 * first check whether the device is in sleep mode */ 190 reg = readl(device + ISL38XX_CTRL_STAT_REG); 191 if (reg & ISL38XX_CTRL_STAT_SLEEPMODE) 192 /* device is in sleep mode, IRQ was generated by someone else */ 193 { 194#if VERBOSE > SHOW_ERROR_MESSAGES 195 DEBUG(SHOW_TRACING, "Assuming someone else called the IRQ\n"); 196#endif 197 spin_unlock(&priv->slock); 198 return IRQ_NONE; 199 } 200 201 202 /* check whether there is any source of interrupt on the device */ 203 reg = readl(device + ISL38XX_INT_IDENT_REG); 204 205 /* also check the contents of the Interrupt Enable Register, because this 206 * will filter out interrupt sources from other devices on the same irq ! */ 207 reg &= readl(device + ISL38XX_INT_EN_REG); 208 reg &= ISL38XX_INT_SOURCES; 209 210 if (reg != 0) { 211 if (islpci_get_state(priv) != PRV_STATE_SLEEP) 212 powerstate = ISL38XX_PSM_ACTIVE_STATE; 213 214 /* reset the request bits in the Identification register */ 215 isl38xx_w32_flush(device, reg, ISL38XX_INT_ACK_REG); 216 217#if VERBOSE > SHOW_ERROR_MESSAGES 218 DEBUG(SHOW_FUNCTION_CALLS, 219 "IRQ: Identification register 0x%p 0x%x\n", device, reg); 220#endif 221 222 /* check for each bit in the register separately */ 223 if (reg & ISL38XX_INT_IDENT_UPDATE) { 224#if VERBOSE > SHOW_ERROR_MESSAGES 225 /* Queue has been updated */ 226 DEBUG(SHOW_TRACING, "IRQ: Update flag\n"); 227 228 DEBUG(SHOW_QUEUE_INDEXES, 229 "CB drv Qs: [%i][%i][%i][%i][%i][%i]\n", 230 le32_to_cpu(priv->control_block-> 231 driver_curr_frag[0]), 232 le32_to_cpu(priv->control_block-> 233 driver_curr_frag[1]), 234 le32_to_cpu(priv->control_block-> 235 driver_curr_frag[2]), 236 le32_to_cpu(priv->control_block-> 237 driver_curr_frag[3]), 238 le32_to_cpu(priv->control_block-> 239 driver_curr_frag[4]), 240 le32_to_cpu(priv->control_block-> 241 driver_curr_frag[5]) 242 ); 243 244 DEBUG(SHOW_QUEUE_INDEXES, 245 "CB dev Qs: [%i][%i][%i][%i][%i][%i]\n", 246 le32_to_cpu(priv->control_block-> 247 device_curr_frag[0]), 248 le32_to_cpu(priv->control_block-> 249 device_curr_frag[1]), 250 le32_to_cpu(priv->control_block-> 251 device_curr_frag[2]), 252 le32_to_cpu(priv->control_block-> 253 device_curr_frag[3]), 254 le32_to_cpu(priv->control_block-> 255 device_curr_frag[4]), 256 le32_to_cpu(priv->control_block-> 257 device_curr_frag[5]) 258 ); 259#endif 260 261 /* cleanup the data low transmit queue */ 262 islpci_eth_cleanup_transmit(priv, priv->control_block); 263 264 /* device is in active state, update the 265 * powerstate flag if necessary */ 266 powerstate = ISL38XX_PSM_ACTIVE_STATE; 267 268 /* check all three queues in priority order 269 * call the PIMFOR receive function until the 270 * queue is empty */ 271 if (isl38xx_in_queue(priv->control_block, 272 ISL38XX_CB_RX_MGMTQ) != 0) { 273#if VERBOSE > SHOW_ERROR_MESSAGES 274 DEBUG(SHOW_TRACING, 275 "Received frame in Management Queue\n"); 276#endif 277 islpci_mgt_receive(ndev); 278 279 islpci_mgt_cleanup_transmit(ndev); 280 281 /* Refill slots in receive queue */ 282 islpci_mgmt_rx_fill(ndev); 283 284 /* no need to trigger the device, next 285 islpci_mgt_transaction does it */ 286 } 287 288 while (isl38xx_in_queue(priv->control_block, 289 ISL38XX_CB_RX_DATA_LQ) != 0) { 290#if VERBOSE > SHOW_ERROR_MESSAGES 291 DEBUG(SHOW_TRACING, 292 "Received frame in Data Low Queue\n"); 293#endif 294 islpci_eth_receive(priv); 295 } 296 297 /* check whether the data transmit queues were full */ 298 if (priv->data_low_tx_full) { 299 /* check whether the transmit is not full anymore */ 300 if (ISL38XX_CB_TX_QSIZE - 301 isl38xx_in_queue(priv->control_block, 302 ISL38XX_CB_TX_DATA_LQ) >= 303 ISL38XX_MIN_QTHRESHOLD) { 304 /* nope, the driver is ready for more network frames */ 305 netif_wake_queue(priv->ndev); 306 307 /* reset the full flag */ 308 priv->data_low_tx_full = 0; 309 } 310 } 311 } 312 313 if (reg & ISL38XX_INT_IDENT_INIT) { 314 /* Device has been initialized */ 315#if VERBOSE > SHOW_ERROR_MESSAGES 316 DEBUG(SHOW_TRACING, 317 "IRQ: Init flag, device initialized\n"); 318#endif 319 wake_up(&priv->reset_done); 320 } 321 322 if (reg & ISL38XX_INT_IDENT_SLEEP) { 323 /* Device intends to move to powersave state */ 324#if VERBOSE > SHOW_ERROR_MESSAGES 325 DEBUG(SHOW_TRACING, "IRQ: Sleep flag\n"); 326#endif 327 isl38xx_handle_sleep_request(priv->control_block, 328 &powerstate, 329 priv->device_base); 330 } 331 332 if (reg & ISL38XX_INT_IDENT_WAKEUP) { 333 /* Device has been woken up to active state */ 334#if VERBOSE > SHOW_ERROR_MESSAGES 335 DEBUG(SHOW_TRACING, "IRQ: Wakeup flag\n"); 336#endif 337 338 isl38xx_handle_wakeup(priv->control_block, 339 &powerstate, priv->device_base); 340 } 341 } else { 342#if VERBOSE > SHOW_ERROR_MESSAGES 343 DEBUG(SHOW_TRACING, "Assuming someone else called the IRQ\n"); 344#endif 345 spin_unlock(&priv->slock); 346 return IRQ_NONE; 347 } 348 349 /* sleep -> ready */ 350 if (islpci_get_state(priv) == PRV_STATE_SLEEP 351 && powerstate == ISL38XX_PSM_ACTIVE_STATE) 352 islpci_set_state(priv, PRV_STATE_READY); 353 354 /* !sleep -> sleep */ 355 if (islpci_get_state(priv) != PRV_STATE_SLEEP 356 && powerstate == ISL38XX_PSM_POWERSAVE_STATE) 357 islpci_set_state(priv, PRV_STATE_SLEEP); 358 359 /* unlock the interrupt handler */ 360 spin_unlock(&priv->slock); 361 362 return IRQ_HANDLED; 363} 364 365/****************************************************************************** 366 Network Interface Control & Statistical functions 367******************************************************************************/ 368static int 369islpci_open(struct net_device *ndev) 370{ 371 u32 rc; 372 islpci_private *priv = netdev_priv(ndev); 373 374 /* reset data structures, upload firmware and reset device */ 375 rc = islpci_reset(priv,1); 376 if (rc) { 377 prism54_bring_down(priv); 378 return rc; /* Returns informative message */ 379 } 380 381 netif_start_queue(ndev); 382 383 /* Turn off carrier if in STA or Ad-hoc mode. It will be turned on 384 * once the firmware receives a trap of being associated 385 * (GEN_OID_LINKSTATE). In other modes (AP or WDS or monitor) we 386 * should just leave the carrier on as its expected the firmware 387 * won't send us a trigger. */ 388 if (priv->iw_mode == IW_MODE_INFRA || priv->iw_mode == IW_MODE_ADHOC) 389 netif_carrier_off(ndev); 390 else 391 netif_carrier_on(ndev); 392 393 return 0; 394} 395 396static int 397islpci_close(struct net_device *ndev) 398{ 399 islpci_private *priv = netdev_priv(ndev); 400 401 printk(KERN_DEBUG "%s: islpci_close ()\n", ndev->name); 402 403 netif_stop_queue(ndev); 404 405 return prism54_bring_down(priv); 406} 407 408static int 409prism54_bring_down(islpci_private *priv) 410{ 411 void __iomem *device_base = priv->device_base; 412 u32 reg; 413 /* we are going to shutdown the device */ 414 islpci_set_state(priv, PRV_STATE_PREBOOT); 415 416 /* disable all device interrupts in case they weren't */ 417 isl38xx_disable_interrupts(priv->device_base); 418 419 /* For safety reasons, we may want to ensure that no DMA transfer is 420 * currently in progress by emptying the TX and RX queues. */ 421 422 /* wait until interrupts have finished executing on other CPUs */ 423 synchronize_irq(priv->pdev->irq); 424 425 reg = readl(device_base + ISL38XX_CTRL_STAT_REG); 426 reg &= ~(ISL38XX_CTRL_STAT_RESET | ISL38XX_CTRL_STAT_RAMBOOT); 427 writel(reg, device_base + ISL38XX_CTRL_STAT_REG); 428 wmb(); 429 udelay(ISL38XX_WRITEIO_DELAY); 430 431 reg |= ISL38XX_CTRL_STAT_RESET; 432 writel(reg, device_base + ISL38XX_CTRL_STAT_REG); 433 wmb(); 434 udelay(ISL38XX_WRITEIO_DELAY); 435 436 /* clear the Reset bit */ 437 reg &= ~ISL38XX_CTRL_STAT_RESET; 438 writel(reg, device_base + ISL38XX_CTRL_STAT_REG); 439 wmb(); 440 441 /* wait a while for the device to reset */ 442 schedule_timeout_uninterruptible(msecs_to_jiffies(50)); 443 444 return 0; 445} 446 447static int 448islpci_upload_fw(islpci_private *priv) 449{ 450 islpci_state_t old_state; 451 u32 rc; 452 453 old_state = islpci_set_state(priv, PRV_STATE_BOOT); 454 455 printk(KERN_DEBUG "%s: uploading firmware...\n", priv->ndev->name); 456 457 rc = isl_upload_firmware(priv); 458 if (rc) { 459 /* error uploading the firmware */ 460 printk(KERN_ERR "%s: could not upload firmware ('%s')\n", 461 priv->ndev->name, priv->firmware); 462 463 islpci_set_state(priv, old_state); 464 return rc; 465 } 466 467 printk(KERN_DEBUG "%s: firmware upload complete\n", 468 priv->ndev->name); 469 470 islpci_set_state(priv, PRV_STATE_POSTBOOT); 471 472 return 0; 473} 474 475static int 476islpci_reset_if(islpci_private *priv) 477{ 478 long remaining; 479 int result = -ETIME; 480 int count; 481 482 DEFINE_WAIT(wait); 483 prepare_to_wait(&priv->reset_done, &wait, TASK_UNINTERRUPTIBLE); 484 485 /* now the last step is to reset the interface */ 486 isl38xx_interface_reset(priv->device_base, priv->device_host_address); 487 islpci_set_state(priv, PRV_STATE_PREINIT); 488 489 for(count = 0; count < 2 && result; count++) { 490 /* The software reset acknowledge needs about 220 msec here. 491 * Be conservative and wait for up to one second. */ 492 493 remaining = schedule_timeout_uninterruptible(HZ); 494 495 if(remaining > 0) { 496 result = 0; 497 break; 498 } 499 500 /* If we're here it's because our IRQ hasn't yet gone through. 501 * Retry a bit more... 502 */ 503 printk(KERN_ERR "%s: no 'reset complete' IRQ seen - retrying\n", 504 priv->ndev->name); 505 } 506 507 finish_wait(&priv->reset_done, &wait); 508 509 if (result) { 510 printk(KERN_ERR "%s: interface reset failure\n", priv->ndev->name); 511 return result; 512 } 513 514 islpci_set_state(priv, PRV_STATE_INIT); 515 516 /* Now that the device is 100% up, let's allow 517 * for the other interrupts -- 518 * NOTE: this is not *yet* true since we've only allowed the 519 * INIT interrupt on the IRQ line. We can perhaps poll 520 * the IRQ line until we know for sure the reset went through */ 521 isl38xx_enable_common_interrupts(priv->device_base); 522 523 down_write(&priv->mib_sem); 524 result = mgt_commit(priv); 525 if (result) { 526 printk(KERN_ERR "%s: interface reset failure\n", priv->ndev->name); 527 up_write(&priv->mib_sem); 528 return result; 529 } 530 up_write(&priv->mib_sem); 531 532 islpci_set_state(priv, PRV_STATE_READY); 533 534 printk(KERN_DEBUG "%s: interface reset complete\n", priv->ndev->name); 535 return 0; 536} 537 538int 539islpci_reset(islpci_private *priv, int reload_firmware) 540{ 541 isl38xx_control_block *cb = /* volatile not needed */ 542 (isl38xx_control_block *) priv->control_block; 543 unsigned counter; 544 int rc; 545 546 if (reload_firmware) 547 islpci_set_state(priv, PRV_STATE_PREBOOT); 548 else 549 islpci_set_state(priv, PRV_STATE_POSTBOOT); 550 551 printk(KERN_DEBUG "%s: resetting device...\n", priv->ndev->name); 552 553 /* disable all device interrupts in case they weren't */ 554 isl38xx_disable_interrupts(priv->device_base); 555 556 /* flush all management queues */ 557 priv->index_mgmt_tx = 0; 558 priv->index_mgmt_rx = 0; 559 560 /* clear the indexes in the frame pointer */ 561 for (counter = 0; counter < ISL38XX_CB_QCOUNT; counter++) { 562 cb->driver_curr_frag[counter] = cpu_to_le32(0); 563 cb->device_curr_frag[counter] = cpu_to_le32(0); 564 } 565 566 /* reset the mgmt receive queue */ 567 for (counter = 0; counter < ISL38XX_CB_MGMT_QSIZE; counter++) { 568 isl38xx_fragment *frag = &cb->rx_data_mgmt[counter]; 569 frag->size = cpu_to_le16(MGMT_FRAME_SIZE); 570 frag->flags = 0; 571 frag->address = cpu_to_le32(priv->mgmt_rx[counter].pci_addr); 572 } 573 574 for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) { 575 cb->rx_data_low[counter].address = 576 cpu_to_le32((u32) priv->pci_map_rx_address[counter]); 577 } 578 579 /* since the receive queues are filled with empty fragments, now we can 580 * set the corresponding indexes in the Control Block */ 581 priv->control_block->driver_curr_frag[ISL38XX_CB_RX_DATA_LQ] = 582 cpu_to_le32(ISL38XX_CB_RX_QSIZE); 583 priv->control_block->driver_curr_frag[ISL38XX_CB_RX_MGMTQ] = 584 cpu_to_le32(ISL38XX_CB_MGMT_QSIZE); 585 586 /* reset the remaining real index registers and full flags */ 587 priv->free_data_rx = 0; 588 priv->free_data_tx = 0; 589 priv->data_low_tx_full = 0; 590 591 if (reload_firmware) { /* Should we load the firmware ? */ 592 /* now that the data structures are cleaned up, upload 593 * firmware and reset interface */ 594 rc = islpci_upload_fw(priv); 595 if (rc) { 596 printk(KERN_ERR "%s: islpci_reset: failure\n", 597 priv->ndev->name); 598 return rc; 599 } 600 } 601 602 /* finally reset interface */ 603 rc = islpci_reset_if(priv); 604 if (rc) 605 printk(KERN_ERR "prism54: Your card/socket may be faulty, or IRQ line too busy :(\n"); 606 return rc; 607} 608 609/****************************************************************************** 610 Network device configuration functions 611******************************************************************************/ 612static int 613islpci_alloc_memory(islpci_private *priv) 614{ 615 int counter; 616 617#if VERBOSE > SHOW_ERROR_MESSAGES 618 printk(KERN_DEBUG "islpci_alloc_memory\n"); 619#endif 620 621 /* remap the PCI device base address to accessible */ 622 if (!(priv->device_base = 623 ioremap(pci_resource_start(priv->pdev, 0), 624 ISL38XX_PCI_MEM_SIZE))) { 625 /* error in remapping the PCI device memory address range */ 626 printk(KERN_ERR "PCI memory remapping failed\n"); 627 return -1; 628 } 629 630 /* memory layout for consistent DMA region: 631 * 632 * Area 1: Control Block for the device interface 633 * Area 2: Power Save Mode Buffer for temporary frame storage. Be aware that 634 * the number of supported stations in the AP determines the minimal 635 * size of the buffer ! 636 */ 637 638 /* perform the allocation */ 639 priv->driver_mem_address = dma_alloc_coherent(&priv->pdev->dev, 640 HOST_MEM_BLOCK, 641 &priv->device_host_address, 642 GFP_KERNEL); 643 644 if (!priv->driver_mem_address) { 645 /* error allocating the block of PCI memory */ 646 printk(KERN_ERR "%s: could not allocate DMA memory, aborting!", 647 "prism54"); 648 return -1; 649 } 650 651 /* assign the Control Block to the first address of the allocated area */ 652 priv->control_block = 653 (isl38xx_control_block *) priv->driver_mem_address; 654 655 /* set the Power Save Buffer pointer directly behind the CB */ 656 priv->device_psm_buffer = 657 priv->device_host_address + CONTROL_BLOCK_SIZE; 658 659 /* make sure all buffer pointers are initialized */ 660 for (counter = 0; counter < ISL38XX_CB_QCOUNT; counter++) { 661 priv->control_block->driver_curr_frag[counter] = cpu_to_le32(0); 662 priv->control_block->device_curr_frag[counter] = cpu_to_le32(0); 663 } 664 665 priv->index_mgmt_rx = 0; 666 memset(priv->mgmt_rx, 0, sizeof(priv->mgmt_rx)); 667 memset(priv->mgmt_tx, 0, sizeof(priv->mgmt_tx)); 668 669 /* allocate rx queue for management frames */ 670 if (islpci_mgmt_rx_fill(priv->ndev) < 0) 671 goto out_free; 672 673 /* now get the data rx skb's */ 674 memset(priv->data_low_rx, 0, sizeof (priv->data_low_rx)); 675 memset(priv->pci_map_rx_address, 0, sizeof (priv->pci_map_rx_address)); 676 677 for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) { 678 struct sk_buff *skb; 679 680 /* allocate an sk_buff for received data frames storage 681 * each frame on receive size consists of 1 fragment 682 * include any required allignment operations */ 683 if (!(skb = dev_alloc_skb(MAX_FRAGMENT_SIZE_RX + 2))) { 684 /* error allocating an sk_buff structure elements */ 685 printk(KERN_ERR "Error allocating skb.\n"); 686 skb = NULL; 687 goto out_free; 688 } 689 skb_reserve(skb, (4 - (long) skb->data) & 0x03); 690 /* add the new allocated sk_buff to the buffer array */ 691 priv->data_low_rx[counter] = skb; 692 693 /* map the allocated skb data area to pci */ 694 priv->pci_map_rx_address[counter] = 695 dma_map_single(&priv->pdev->dev, (void *)skb->data, 696 MAX_FRAGMENT_SIZE_RX + 2, DMA_FROM_DEVICE); 697 if (dma_mapping_error(&priv->pdev->dev, priv->pci_map_rx_address[counter])) { 698 priv->pci_map_rx_address[counter] = 0; 699 /* error mapping the buffer to device 700 accessible memory address */ 701 printk(KERN_ERR "failed to map skb DMA'able\n"); 702 goto out_free; 703 } 704 } 705 706 prism54_acl_init(&priv->acl); 707 prism54_wpa_bss_ie_init(priv); 708 if (mgt_init(priv)) 709 goto out_free; 710 711 return 0; 712 out_free: 713 islpci_free_memory(priv); 714 return -1; 715} 716 717int 718islpci_free_memory(islpci_private *priv) 719{ 720 int counter; 721 722 if (priv->device_base) 723 iounmap(priv->device_base); 724 priv->device_base = NULL; 725 726 /* free consistent DMA area... */ 727 if (priv->driver_mem_address) 728 dma_free_coherent(&priv->pdev->dev, HOST_MEM_BLOCK, 729 priv->driver_mem_address, 730 priv->device_host_address); 731 732 /* clear some dangling pointers */ 733 priv->driver_mem_address = NULL; 734 priv->device_host_address = 0; 735 priv->device_psm_buffer = 0; 736 priv->control_block = NULL; 737 738 /* clean up mgmt rx buffers */ 739 for (counter = 0; counter < ISL38XX_CB_MGMT_QSIZE; counter++) { 740 struct islpci_membuf *buf = &priv->mgmt_rx[counter]; 741 if (buf->pci_addr) 742 dma_unmap_single(&priv->pdev->dev, buf->pci_addr, 743 buf->size, DMA_FROM_DEVICE); 744 buf->pci_addr = 0; 745 kfree(buf->mem); 746 buf->size = 0; 747 buf->mem = NULL; 748 } 749 750 /* clean up data rx buffers */ 751 for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) { 752 if (priv->pci_map_rx_address[counter]) 753 dma_unmap_single(&priv->pdev->dev, 754 priv->pci_map_rx_address[counter], 755 MAX_FRAGMENT_SIZE_RX + 2, 756 DMA_FROM_DEVICE); 757 priv->pci_map_rx_address[counter] = 0; 758 759 if (priv->data_low_rx[counter]) 760 dev_kfree_skb(priv->data_low_rx[counter]); 761 priv->data_low_rx[counter] = NULL; 762 } 763 764 /* Free the access control list and the WPA list */ 765 prism54_acl_clean(&priv->acl); 766 prism54_wpa_bss_ie_clean(priv); 767 mgt_clean(priv); 768 769 return 0; 770} 771 772#if 0 773static void 774islpci_set_multicast_list(struct net_device *dev) 775{ 776 /* put device into promisc mode and let network layer handle it */ 777} 778#endif 779 780static void islpci_ethtool_get_drvinfo(struct net_device *dev, 781 struct ethtool_drvinfo *info) 782{ 783 strlcpy(info->driver, DRV_NAME, sizeof(info->driver)); 784 strlcpy(info->version, DRV_VERSION, sizeof(info->version)); 785} 786 787static const struct ethtool_ops islpci_ethtool_ops = { 788 .get_drvinfo = islpci_ethtool_get_drvinfo, 789}; 790 791static const struct net_device_ops islpci_netdev_ops = { 792 .ndo_open = islpci_open, 793 .ndo_stop = islpci_close, 794 .ndo_start_xmit = islpci_eth_transmit, 795 .ndo_tx_timeout = islpci_eth_tx_timeout, 796 .ndo_set_mac_address = prism54_set_mac_address, 797 .ndo_validate_addr = eth_validate_addr, 798}; 799 800static struct device_type wlan_type = { 801 .name = "wlan", 802}; 803 804struct net_device * 805islpci_setup(struct pci_dev *pdev) 806{ 807 islpci_private *priv; 808 struct net_device *ndev = alloc_etherdev(sizeof (islpci_private)); 809 810 if (!ndev) 811 return ndev; 812 813 pci_set_drvdata(pdev, ndev); 814 SET_NETDEV_DEV(ndev, &pdev->dev); 815 SET_NETDEV_DEVTYPE(ndev, &wlan_type); 816 817 /* setup the structure members */ 818 ndev->base_addr = pci_resource_start(pdev, 0); 819 ndev->irq = pdev->irq; 820 821 /* initialize the function pointers */ 822 ndev->netdev_ops = &islpci_netdev_ops; 823 ndev->wireless_handlers = &prism54_handler_def; 824 ndev->ethtool_ops = &islpci_ethtool_ops; 825 826 /* ndev->set_multicast_list = &islpci_set_multicast_list; */ 827 ndev->addr_len = ETH_ALEN; 828 /* Get a non-zero dummy MAC address for nameif. Jean II */ 829 memcpy(ndev->dev_addr, dummy_mac, ETH_ALEN); 830 831 ndev->watchdog_timeo = ISLPCI_TX_TIMEOUT; 832 833 /* allocate a private device structure to the network device */ 834 priv = netdev_priv(ndev); 835 priv->ndev = ndev; 836 priv->pdev = pdev; 837 priv->monitor_type = ARPHRD_IEEE80211; 838 priv->ndev->type = (priv->iw_mode == IW_MODE_MONITOR) ? 839 priv->monitor_type : ARPHRD_ETHER; 840 841 /* Add pointers to enable iwspy support. */ 842 priv->wireless_data.spy_data = &priv->spy_data; 843 ndev->wireless_data = &priv->wireless_data; 844 845 /* save the start and end address of the PCI memory area */ 846 ndev->mem_start = (unsigned long) priv->device_base; 847 ndev->mem_end = ndev->mem_start + ISL38XX_PCI_MEM_SIZE; 848 849#if VERBOSE > SHOW_ERROR_MESSAGES 850 DEBUG(SHOW_TRACING, "PCI Memory remapped to 0x%p\n", priv->device_base); 851#endif 852 853 init_waitqueue_head(&priv->reset_done); 854 855 /* init the queue read locks, process wait counter */ 856 mutex_init(&priv->mgmt_lock); 857 priv->mgmt_received = NULL; 858 init_waitqueue_head(&priv->mgmt_wqueue); 859 mutex_init(&priv->stats_lock); 860 spin_lock_init(&priv->slock); 861 862 /* init state machine with off#1 state */ 863 priv->state = PRV_STATE_OFF; 864 priv->state_off = 1; 865 866 /* initialize workqueue's */ 867 INIT_WORK(&priv->stats_work, prism54_update_stats); 868 priv->stats_timestamp = 0; 869 870 INIT_WORK(&priv->reset_task, islpci_do_reset_and_wake); 871 priv->reset_task_pending = 0; 872 873 /* allocate various memory areas */ 874 if (islpci_alloc_memory(priv)) 875 goto do_free_netdev; 876 877 /* select the firmware file depending on the device id */ 878 switch (pdev->device) { 879 case 0x3877: 880 strcpy(priv->firmware, ISL3877_IMAGE_FILE); 881 break; 882 883 case 0x3886: 884 strcpy(priv->firmware, ISL3886_IMAGE_FILE); 885 break; 886 887 default: 888 strcpy(priv->firmware, ISL3890_IMAGE_FILE); 889 break; 890 } 891 892 if (register_netdev(ndev)) { 893 DEBUG(SHOW_ERROR_MESSAGES, 894 "ERROR: register_netdev() failed\n"); 895 goto do_islpci_free_memory; 896 } 897 898 return ndev; 899 900 do_islpci_free_memory: 901 islpci_free_memory(priv); 902 do_free_netdev: 903 free_netdev(ndev); 904 priv = NULL; 905 return NULL; 906} 907 908islpci_state_t 909islpci_set_state(islpci_private *priv, islpci_state_t new_state) 910{ 911 islpci_state_t old_state; 912 913 /* lock */ 914 old_state = priv->state; 915 916 /* this means either a race condition or some serious error in 917 * the driver code */ 918 switch (new_state) { 919 case PRV_STATE_OFF: 920 priv->state_off++; 921 fallthrough; 922 default: 923 priv->state = new_state; 924 break; 925 926 case PRV_STATE_PREBOOT: 927 /* there are actually many off-states, enumerated by 928 * state_off */ 929 if (old_state == PRV_STATE_OFF) 930 priv->state_off--; 931 932 /* only if hw_unavailable is zero now it means we either 933 * were in off#1 state, or came here from 934 * somewhere else */ 935 if (!priv->state_off) 936 priv->state = new_state; 937 break; 938 } 939#if 0 940 printk(KERN_DEBUG "%s: state transition %d -> %d (off#%d)\n", 941 priv->ndev->name, old_state, new_state, priv->state_off); 942#endif 943 944 /* invariants */ 945 BUG_ON(priv->state_off < 0); 946 BUG_ON(priv->state_off && (priv->state != PRV_STATE_OFF)); 947 BUG_ON(!priv->state_off && (priv->state == PRV_STATE_OFF)); 948 949 /* unlock */ 950 return old_state; 951} 952