1/* 2 * Copyright (c) 2004-2011 Atheros Communications Inc. 3 * Copyright (c) 2011-2012 Qualcomm Atheros, Inc. 4 * 5 * Permission to use, copy, modify, and/or distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16 */ 17 18#include <linux/module.h> 19#include <linux/mmc/card.h> 20#include <linux/mmc/mmc.h> 21#include <linux/mmc/host.h> 22#include <linux/mmc/sdio_func.h> 23#include <linux/mmc/sdio_ids.h> 24#include <linux/mmc/sdio.h> 25#include <linux/mmc/sd.h> 26#include "hif.h" 27#include "hif-ops.h" 28#include "target.h" 29#include "debug.h" 30#include "cfg80211.h" 31#include "trace.h" 32 33struct ath6kl_sdio { 34 struct sdio_func *func; 35 36 /* protects access to bus_req_freeq */ 37 spinlock_t lock; 38 39 /* free list */ 40 struct list_head bus_req_freeq; 41 42 /* available bus requests */ 43 struct bus_request bus_req[BUS_REQUEST_MAX_NUM]; 44 45 struct ath6kl *ar; 46 47 u8 *dma_buffer; 48 49 /* protects access to dma_buffer */ 50 struct mutex dma_buffer_mutex; 51 52 /* scatter request list head */ 53 struct list_head scat_req; 54 55 atomic_t irq_handling; 56 wait_queue_head_t irq_wq; 57 58 /* protects access to scat_req */ 59 spinlock_t scat_lock; 60 61 bool scatter_enabled; 62 63 bool is_disabled; 64 const struct sdio_device_id *id; 65 struct work_struct wr_async_work; 66 struct list_head wr_asyncq; 67 68 /* protects access to wr_asyncq */ 69 spinlock_t wr_async_lock; 70}; 71 72#define CMD53_ARG_READ 0 73#define CMD53_ARG_WRITE 1 74#define CMD53_ARG_BLOCK_BASIS 1 75#define CMD53_ARG_FIXED_ADDRESS 0 76#define CMD53_ARG_INCR_ADDRESS 1 77 78static int ath6kl_sdio_config(struct ath6kl *ar); 79 80static inline struct ath6kl_sdio *ath6kl_sdio_priv(struct ath6kl *ar) 81{ 82 return ar->hif_priv; 83} 84 85/* 86 * Macro to check if DMA buffer is WORD-aligned and DMA-able. 87 * Most host controllers assume the buffer is DMA'able and will 88 * bug-check otherwise (i.e. buffers on the stack). virt_addr_valid 89 * check fails on stack memory. 90 */ 91static inline bool buf_needs_bounce(u8 *buf) 92{ 93 return ((unsigned long) buf & 0x3) || !virt_addr_valid(buf); 94} 95 96static void ath6kl_sdio_set_mbox_info(struct ath6kl *ar) 97{ 98 struct ath6kl_mbox_info *mbox_info = &ar->mbox_info; 99 100 /* EP1 has an extended range */ 101 mbox_info->htc_addr = HIF_MBOX_BASE_ADDR; 102 mbox_info->htc_ext_addr = HIF_MBOX0_EXT_BASE_ADDR; 103 mbox_info->htc_ext_sz = HIF_MBOX0_EXT_WIDTH; 104 mbox_info->block_size = HIF_MBOX_BLOCK_SIZE; 105 mbox_info->gmbox_addr = HIF_GMBOX_BASE_ADDR; 106 mbox_info->gmbox_sz = HIF_GMBOX_WIDTH; 107} 108 109static inline void ath6kl_sdio_set_cmd53_arg(u32 *arg, u8 rw, u8 func, 110 u8 mode, u8 opcode, u32 addr, 111 u16 blksz) 112{ 113 *arg = (((rw & 1) << 31) | 114 ((func & 0x7) << 28) | 115 ((mode & 1) << 27) | 116 ((opcode & 1) << 26) | 117 ((addr & 0x1FFFF) << 9) | 118 (blksz & 0x1FF)); 119} 120 121static inline void ath6kl_sdio_set_cmd52_arg(u32 *arg, u8 write, u8 raw, 122 unsigned int address, 123 unsigned char val) 124{ 125 const u8 func = 0; 126 127 *arg = ((write & 1) << 31) | 128 ((func & 0x7) << 28) | 129 ((raw & 1) << 27) | 130 (1 << 26) | 131 ((address & 0x1FFFF) << 9) | 132 (1 << 8) | 133 (val & 0xFF); 134} 135 136static int ath6kl_sdio_func0_cmd52_wr_byte(struct mmc_card *card, 137 unsigned int address, 138 unsigned char byte) 139{ 140 struct mmc_command io_cmd; 141 142 memset(&io_cmd, 0, sizeof(io_cmd)); 143 ath6kl_sdio_set_cmd52_arg(&io_cmd.arg, 1, 0, address, byte); 144 io_cmd.opcode = SD_IO_RW_DIRECT; 145 io_cmd.flags = MMC_RSP_R5 | MMC_CMD_AC; 146 147 return mmc_wait_for_cmd(card->host, &io_cmd, 0); 148} 149 150static int ath6kl_sdio_io(struct sdio_func *func, u32 request, u32 addr, 151 u8 *buf, u32 len) 152{ 153 int ret = 0; 154 155 sdio_claim_host(func); 156 157 if (request & HIF_WRITE) { 158 /* FIXME: looks like ugly workaround for something */ 159 if (addr >= HIF_MBOX_BASE_ADDR && 160 addr <= HIF_MBOX_END_ADDR) 161 addr += (HIF_MBOX_WIDTH - len); 162 163 /* FIXME: this also looks like ugly workaround */ 164 if (addr == HIF_MBOX0_EXT_BASE_ADDR) 165 addr += HIF_MBOX0_EXT_WIDTH - len; 166 167 if (request & HIF_FIXED_ADDRESS) 168 ret = sdio_writesb(func, addr, buf, len); 169 else 170 ret = sdio_memcpy_toio(func, addr, buf, len); 171 } else { 172 if (request & HIF_FIXED_ADDRESS) 173 ret = sdio_readsb(func, buf, addr, len); 174 else 175 ret = sdio_memcpy_fromio(func, buf, addr, len); 176 } 177 178 sdio_release_host(func); 179 180 ath6kl_dbg(ATH6KL_DBG_SDIO, "%s addr 0x%x%s buf 0x%p len %d\n", 181 request & HIF_WRITE ? "wr" : "rd", addr, 182 request & HIF_FIXED_ADDRESS ? " (fixed)" : "", buf, len); 183 ath6kl_dbg_dump(ATH6KL_DBG_SDIO_DUMP, NULL, "sdio ", buf, len); 184 185 trace_ath6kl_sdio(addr, request, buf, len); 186 187 return ret; 188} 189 190static struct bus_request *ath6kl_sdio_alloc_busreq(struct ath6kl_sdio *ar_sdio) 191{ 192 struct bus_request *bus_req; 193 194 spin_lock_bh(&ar_sdio->lock); 195 196 if (list_empty(&ar_sdio->bus_req_freeq)) { 197 spin_unlock_bh(&ar_sdio->lock); 198 return NULL; 199 } 200 201 bus_req = list_first_entry(&ar_sdio->bus_req_freeq, 202 struct bus_request, list); 203 list_del(&bus_req->list); 204 205 spin_unlock_bh(&ar_sdio->lock); 206 ath6kl_dbg(ATH6KL_DBG_SCATTER, "%s: bus request 0x%p\n", 207 __func__, bus_req); 208 209 return bus_req; 210} 211 212static void ath6kl_sdio_free_bus_req(struct ath6kl_sdio *ar_sdio, 213 struct bus_request *bus_req) 214{ 215 ath6kl_dbg(ATH6KL_DBG_SCATTER, "%s: bus request 0x%p\n", 216 __func__, bus_req); 217 218 spin_lock_bh(&ar_sdio->lock); 219 list_add_tail(&bus_req->list, &ar_sdio->bus_req_freeq); 220 spin_unlock_bh(&ar_sdio->lock); 221} 222 223static void ath6kl_sdio_setup_scat_data(struct hif_scatter_req *scat_req, 224 struct mmc_data *data) 225{ 226 struct scatterlist *sg; 227 int i; 228 229 data->blksz = HIF_MBOX_BLOCK_SIZE; 230 data->blocks = scat_req->len / HIF_MBOX_BLOCK_SIZE; 231 232 ath6kl_dbg(ATH6KL_DBG_SCATTER, 233 "hif-scatter: (%s) addr: 0x%X, (block len: %d, block count: %d) , (tot:%d,sg:%d)\n", 234 (scat_req->req & HIF_WRITE) ? "WR" : "RD", scat_req->addr, 235 data->blksz, data->blocks, scat_req->len, 236 scat_req->scat_entries); 237 238 data->flags = (scat_req->req & HIF_WRITE) ? MMC_DATA_WRITE : 239 MMC_DATA_READ; 240 241 /* fill SG entries */ 242 sg = scat_req->sgentries; 243 sg_init_table(sg, scat_req->scat_entries); 244 245 /* assemble SG list */ 246 for (i = 0; i < scat_req->scat_entries; i++, sg++) { 247 ath6kl_dbg(ATH6KL_DBG_SCATTER, "%d: addr:0x%p, len:%d\n", 248 i, scat_req->scat_list[i].buf, 249 scat_req->scat_list[i].len); 250 251 sg_set_buf(sg, scat_req->scat_list[i].buf, 252 scat_req->scat_list[i].len); 253 } 254 255 /* set scatter-gather table for request */ 256 data->sg = scat_req->sgentries; 257 data->sg_len = scat_req->scat_entries; 258} 259 260static int ath6kl_sdio_scat_rw(struct ath6kl_sdio *ar_sdio, 261 struct bus_request *req) 262{ 263 struct mmc_request mmc_req; 264 struct mmc_command cmd; 265 struct mmc_data data; 266 struct hif_scatter_req *scat_req; 267 u8 opcode, rw; 268 int status, len; 269 270 scat_req = req->scat_req; 271 272 if (scat_req->virt_scat) { 273 len = scat_req->len; 274 if (scat_req->req & HIF_BLOCK_BASIS) 275 len = round_down(len, HIF_MBOX_BLOCK_SIZE); 276 277 status = ath6kl_sdio_io(ar_sdio->func, scat_req->req, 278 scat_req->addr, scat_req->virt_dma_buf, 279 len); 280 goto scat_complete; 281 } 282 283 memset(&mmc_req, 0, sizeof(struct mmc_request)); 284 memset(&cmd, 0, sizeof(struct mmc_command)); 285 memset(&data, 0, sizeof(struct mmc_data)); 286 287 ath6kl_sdio_setup_scat_data(scat_req, &data); 288 289 opcode = (scat_req->req & HIF_FIXED_ADDRESS) ? 290 CMD53_ARG_FIXED_ADDRESS : CMD53_ARG_INCR_ADDRESS; 291 292 rw = (scat_req->req & HIF_WRITE) ? CMD53_ARG_WRITE : CMD53_ARG_READ; 293 294 /* Fixup the address so that the last byte will fall on MBOX EOM */ 295 if (scat_req->req & HIF_WRITE) { 296 if (scat_req->addr == HIF_MBOX_BASE_ADDR) 297 scat_req->addr += HIF_MBOX_WIDTH - scat_req->len; 298 else 299 /* Uses extended address range */ 300 scat_req->addr += HIF_MBOX0_EXT_WIDTH - scat_req->len; 301 } 302 303 /* set command argument */ 304 ath6kl_sdio_set_cmd53_arg(&cmd.arg, rw, ar_sdio->func->num, 305 CMD53_ARG_BLOCK_BASIS, opcode, scat_req->addr, 306 data.blocks); 307 308 cmd.opcode = SD_IO_RW_EXTENDED; 309 cmd.flags = MMC_RSP_SPI_R5 | MMC_RSP_R5 | MMC_CMD_ADTC; 310 311 mmc_req.cmd = &cmd; 312 mmc_req.data = &data; 313 314 sdio_claim_host(ar_sdio->func); 315 316 mmc_set_data_timeout(&data, ar_sdio->func->card); 317 318 trace_ath6kl_sdio_scat(scat_req->addr, 319 scat_req->req, 320 scat_req->len, 321 scat_req->scat_entries, 322 scat_req->scat_list); 323 324 /* synchronous call to process request */ 325 mmc_wait_for_req(ar_sdio->func->card->host, &mmc_req); 326 327 sdio_release_host(ar_sdio->func); 328 329 status = cmd.error ? cmd.error : data.error; 330 331scat_complete: 332 scat_req->status = status; 333 334 if (scat_req->status) 335 ath6kl_err("Scatter write request failed:%d\n", 336 scat_req->status); 337 338 if (scat_req->req & HIF_ASYNCHRONOUS) 339 scat_req->complete(ar_sdio->ar->htc_target, scat_req); 340 341 return status; 342} 343 344static int ath6kl_sdio_alloc_prep_scat_req(struct ath6kl_sdio *ar_sdio, 345 int n_scat_entry, int n_scat_req, 346 bool virt_scat) 347{ 348 struct hif_scatter_req *s_req; 349 struct bus_request *bus_req; 350 int i, scat_req_sz, scat_list_sz, size; 351 u8 *virt_buf; 352 353 scat_list_sz = n_scat_entry * sizeof(struct hif_scatter_item); 354 scat_req_sz = sizeof(*s_req) + scat_list_sz; 355 356 if (!virt_scat) 357 size = sizeof(struct scatterlist) * n_scat_entry; 358 else 359 size = 2 * L1_CACHE_BYTES + 360 ATH6KL_MAX_TRANSFER_SIZE_PER_SCATTER; 361 362 for (i = 0; i < n_scat_req; i++) { 363 /* allocate the scatter request */ 364 s_req = kzalloc(scat_req_sz, GFP_KERNEL); 365 if (!s_req) 366 return -ENOMEM; 367 368 if (virt_scat) { 369 virt_buf = kzalloc(size, GFP_KERNEL); 370 if (!virt_buf) { 371 kfree(s_req); 372 return -ENOMEM; 373 } 374 375 s_req->virt_dma_buf = 376 (u8 *)L1_CACHE_ALIGN((unsigned long)virt_buf); 377 } else { 378 /* allocate sglist */ 379 s_req->sgentries = kzalloc(size, GFP_KERNEL); 380 381 if (!s_req->sgentries) { 382 kfree(s_req); 383 return -ENOMEM; 384 } 385 } 386 387 /* allocate a bus request for this scatter request */ 388 bus_req = ath6kl_sdio_alloc_busreq(ar_sdio); 389 if (!bus_req) { 390 kfree(s_req->sgentries); 391 kfree(s_req->virt_dma_buf); 392 kfree(s_req); 393 return -ENOMEM; 394 } 395 396 /* assign the scatter request to this bus request */ 397 bus_req->scat_req = s_req; 398 s_req->busrequest = bus_req; 399 400 s_req->virt_scat = virt_scat; 401 402 /* add it to the scatter pool */ 403 hif_scatter_req_add(ar_sdio->ar, s_req); 404 } 405 406 return 0; 407} 408 409static int ath6kl_sdio_read_write_sync(struct ath6kl *ar, u32 addr, u8 *buf, 410 u32 len, u32 request) 411{ 412 struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar); 413 u8 *tbuf = NULL; 414 int ret; 415 bool bounced = false; 416 417 if (request & HIF_BLOCK_BASIS) 418 len = round_down(len, HIF_MBOX_BLOCK_SIZE); 419 420 if (buf_needs_bounce(buf)) { 421 if (!ar_sdio->dma_buffer) 422 return -ENOMEM; 423 mutex_lock(&ar_sdio->dma_buffer_mutex); 424 tbuf = ar_sdio->dma_buffer; 425 426 if (request & HIF_WRITE) 427 memcpy(tbuf, buf, len); 428 429 bounced = true; 430 } else { 431 tbuf = buf; 432 } 433 434 ret = ath6kl_sdio_io(ar_sdio->func, request, addr, tbuf, len); 435 if ((request & HIF_READ) && bounced) 436 memcpy(buf, tbuf, len); 437 438 if (bounced) 439 mutex_unlock(&ar_sdio->dma_buffer_mutex); 440 441 return ret; 442} 443 444static void __ath6kl_sdio_write_async(struct ath6kl_sdio *ar_sdio, 445 struct bus_request *req) 446{ 447 if (req->scat_req) { 448 ath6kl_sdio_scat_rw(ar_sdio, req); 449 } else { 450 void *context; 451 int status; 452 453 status = ath6kl_sdio_read_write_sync(ar_sdio->ar, req->address, 454 req->buffer, req->length, 455 req->request); 456 context = req->packet; 457 ath6kl_sdio_free_bus_req(ar_sdio, req); 458 ath6kl_hif_rw_comp_handler(context, status); 459 } 460} 461 462static void ath6kl_sdio_write_async_work(struct work_struct *work) 463{ 464 struct ath6kl_sdio *ar_sdio; 465 struct bus_request *req, *tmp_req; 466 467 ar_sdio = container_of(work, struct ath6kl_sdio, wr_async_work); 468 469 spin_lock_bh(&ar_sdio->wr_async_lock); 470 list_for_each_entry_safe(req, tmp_req, &ar_sdio->wr_asyncq, list) { 471 list_del(&req->list); 472 spin_unlock_bh(&ar_sdio->wr_async_lock); 473 __ath6kl_sdio_write_async(ar_sdio, req); 474 spin_lock_bh(&ar_sdio->wr_async_lock); 475 } 476 spin_unlock_bh(&ar_sdio->wr_async_lock); 477} 478 479static void ath6kl_sdio_irq_handler(struct sdio_func *func) 480{ 481 int status; 482 struct ath6kl_sdio *ar_sdio; 483 484 ath6kl_dbg(ATH6KL_DBG_SDIO, "irq\n"); 485 486 ar_sdio = sdio_get_drvdata(func); 487 atomic_set(&ar_sdio->irq_handling, 1); 488 /* 489 * Release the host during interrups so we can pick it back up when 490 * we process commands. 491 */ 492 sdio_release_host(ar_sdio->func); 493 494 status = ath6kl_hif_intr_bh_handler(ar_sdio->ar); 495 sdio_claim_host(ar_sdio->func); 496 497 atomic_set(&ar_sdio->irq_handling, 0); 498 wake_up(&ar_sdio->irq_wq); 499 500 WARN_ON(status && status != -ECANCELED); 501} 502 503static int ath6kl_sdio_power_on(struct ath6kl *ar) 504{ 505 struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar); 506 struct sdio_func *func = ar_sdio->func; 507 int ret = 0; 508 509 if (!ar_sdio->is_disabled) 510 return 0; 511 512 ath6kl_dbg(ATH6KL_DBG_BOOT, "sdio power on\n"); 513 514 sdio_claim_host(func); 515 516 ret = sdio_enable_func(func); 517 if (ret) { 518 ath6kl_err("Unable to enable sdio func: %d)\n", ret); 519 sdio_release_host(func); 520 return ret; 521 } 522 523 sdio_release_host(func); 524 525 /* 526 * Wait for hardware to initialise. It should take a lot less than 527 * 10 ms but let's be conservative here. 528 */ 529 msleep(10); 530 531 ret = ath6kl_sdio_config(ar); 532 if (ret) { 533 ath6kl_err("Failed to config sdio: %d\n", ret); 534 goto out; 535 } 536 537 ar_sdio->is_disabled = false; 538 539out: 540 return ret; 541} 542 543static int ath6kl_sdio_power_off(struct ath6kl *ar) 544{ 545 struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar); 546 int ret; 547 548 if (ar_sdio->is_disabled) 549 return 0; 550 551 ath6kl_dbg(ATH6KL_DBG_BOOT, "sdio power off\n"); 552 553 /* Disable the card */ 554 sdio_claim_host(ar_sdio->func); 555 ret = sdio_disable_func(ar_sdio->func); 556 sdio_release_host(ar_sdio->func); 557 558 if (ret) 559 return ret; 560 561 ar_sdio->is_disabled = true; 562 563 return ret; 564} 565 566static int ath6kl_sdio_write_async(struct ath6kl *ar, u32 address, u8 *buffer, 567 u32 length, u32 request, 568 struct htc_packet *packet) 569{ 570 struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar); 571 struct bus_request *bus_req; 572 573 bus_req = ath6kl_sdio_alloc_busreq(ar_sdio); 574 575 if (WARN_ON_ONCE(!bus_req)) 576 return -ENOMEM; 577 578 bus_req->address = address; 579 bus_req->buffer = buffer; 580 bus_req->length = length; 581 bus_req->request = request; 582 bus_req->packet = packet; 583 584 spin_lock_bh(&ar_sdio->wr_async_lock); 585 list_add_tail(&bus_req->list, &ar_sdio->wr_asyncq); 586 spin_unlock_bh(&ar_sdio->wr_async_lock); 587 queue_work(ar->ath6kl_wq, &ar_sdio->wr_async_work); 588 589 return 0; 590} 591 592static void ath6kl_sdio_irq_enable(struct ath6kl *ar) 593{ 594 struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar); 595 int ret; 596 597 sdio_claim_host(ar_sdio->func); 598 599 /* Register the isr */ 600 ret = sdio_claim_irq(ar_sdio->func, ath6kl_sdio_irq_handler); 601 if (ret) 602 ath6kl_err("Failed to claim sdio irq: %d\n", ret); 603 604 sdio_release_host(ar_sdio->func); 605} 606 607static bool ath6kl_sdio_is_on_irq(struct ath6kl *ar) 608{ 609 struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar); 610 611 return !atomic_read(&ar_sdio->irq_handling); 612} 613 614static void ath6kl_sdio_irq_disable(struct ath6kl *ar) 615{ 616 struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar); 617 int ret; 618 619 sdio_claim_host(ar_sdio->func); 620 621 if (atomic_read(&ar_sdio->irq_handling)) { 622 sdio_release_host(ar_sdio->func); 623 624 ret = wait_event_interruptible(ar_sdio->irq_wq, 625 ath6kl_sdio_is_on_irq(ar)); 626 if (ret) 627 return; 628 629 sdio_claim_host(ar_sdio->func); 630 } 631 632 ret = sdio_release_irq(ar_sdio->func); 633 if (ret) 634 ath6kl_err("Failed to release sdio irq: %d\n", ret); 635 636 sdio_release_host(ar_sdio->func); 637} 638 639static struct hif_scatter_req *ath6kl_sdio_scatter_req_get(struct ath6kl *ar) 640{ 641 struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar); 642 struct hif_scatter_req *node = NULL; 643 644 spin_lock_bh(&ar_sdio->scat_lock); 645 646 if (!list_empty(&ar_sdio->scat_req)) { 647 node = list_first_entry(&ar_sdio->scat_req, 648 struct hif_scatter_req, list); 649 list_del(&node->list); 650 651 node->scat_q_depth = get_queue_depth(&ar_sdio->scat_req); 652 } 653 654 spin_unlock_bh(&ar_sdio->scat_lock); 655 656 return node; 657} 658 659static void ath6kl_sdio_scatter_req_add(struct ath6kl *ar, 660 struct hif_scatter_req *s_req) 661{ 662 struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar); 663 664 spin_lock_bh(&ar_sdio->scat_lock); 665 666 list_add_tail(&s_req->list, &ar_sdio->scat_req); 667 668 spin_unlock_bh(&ar_sdio->scat_lock); 669} 670 671/* scatter gather read write request */ 672static int ath6kl_sdio_async_rw_scatter(struct ath6kl *ar, 673 struct hif_scatter_req *scat_req) 674{ 675 struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar); 676 u32 request = scat_req->req; 677 int status = 0; 678 679 if (!scat_req->len) 680 return -EINVAL; 681 682 ath6kl_dbg(ATH6KL_DBG_SCATTER, 683 "hif-scatter: total len: %d scatter entries: %d\n", 684 scat_req->len, scat_req->scat_entries); 685 686 if (request & HIF_SYNCHRONOUS) { 687 status = ath6kl_sdio_scat_rw(ar_sdio, scat_req->busrequest); 688 } else { 689 spin_lock_bh(&ar_sdio->wr_async_lock); 690 list_add_tail(&scat_req->busrequest->list, &ar_sdio->wr_asyncq); 691 spin_unlock_bh(&ar_sdio->wr_async_lock); 692 queue_work(ar->ath6kl_wq, &ar_sdio->wr_async_work); 693 } 694 695 return status; 696} 697 698/* clean up scatter support */ 699static void ath6kl_sdio_cleanup_scatter(struct ath6kl *ar) 700{ 701 struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar); 702 struct hif_scatter_req *s_req, *tmp_req; 703 704 /* empty the free list */ 705 spin_lock_bh(&ar_sdio->scat_lock); 706 list_for_each_entry_safe(s_req, tmp_req, &ar_sdio->scat_req, list) { 707 list_del(&s_req->list); 708 spin_unlock_bh(&ar_sdio->scat_lock); 709 710 /* 711 * FIXME: should we also call completion handler with 712 * ath6kl_hif_rw_comp_handler() with status -ECANCELED so 713 * that the packet is properly freed? 714 */ 715 if (s_req->busrequest) { 716 s_req->busrequest->scat_req = NULL; 717 ath6kl_sdio_free_bus_req(ar_sdio, s_req->busrequest); 718 } 719 kfree(s_req->virt_dma_buf); 720 kfree(s_req->sgentries); 721 kfree(s_req); 722 723 spin_lock_bh(&ar_sdio->scat_lock); 724 } 725 spin_unlock_bh(&ar_sdio->scat_lock); 726 727 ar_sdio->scatter_enabled = false; 728} 729 730/* setup of HIF scatter resources */ 731static int ath6kl_sdio_enable_scatter(struct ath6kl *ar) 732{ 733 struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar); 734 struct htc_target *target = ar->htc_target; 735 int ret = 0; 736 bool virt_scat = false; 737 738 if (ar_sdio->scatter_enabled) 739 return 0; 740 741 ar_sdio->scatter_enabled = true; 742 743 /* check if host supports scatter and it meets our requirements */ 744 if (ar_sdio->func->card->host->max_segs < MAX_SCATTER_ENTRIES_PER_REQ) { 745 ath6kl_err("host only supports scatter of :%d entries, need: %d\n", 746 ar_sdio->func->card->host->max_segs, 747 MAX_SCATTER_ENTRIES_PER_REQ); 748 virt_scat = true; 749 } 750 751 if (!virt_scat) { 752 ret = ath6kl_sdio_alloc_prep_scat_req(ar_sdio, 753 MAX_SCATTER_ENTRIES_PER_REQ, 754 MAX_SCATTER_REQUESTS, virt_scat); 755 756 if (!ret) { 757 ath6kl_dbg(ATH6KL_DBG_BOOT, 758 "hif-scatter enabled requests %d entries %d\n", 759 MAX_SCATTER_REQUESTS, 760 MAX_SCATTER_ENTRIES_PER_REQ); 761 762 target->max_scat_entries = MAX_SCATTER_ENTRIES_PER_REQ; 763 target->max_xfer_szper_scatreq = 764 MAX_SCATTER_REQ_TRANSFER_SIZE; 765 } else { 766 ath6kl_sdio_cleanup_scatter(ar); 767 ath6kl_warn("hif scatter resource setup failed, trying virtual scatter method\n"); 768 } 769 } 770 771 if (virt_scat || ret) { 772 ret = ath6kl_sdio_alloc_prep_scat_req(ar_sdio, 773 ATH6KL_SCATTER_ENTRIES_PER_REQ, 774 ATH6KL_SCATTER_REQS, virt_scat); 775 776 if (ret) { 777 ath6kl_err("failed to alloc virtual scatter resources !\n"); 778 ath6kl_sdio_cleanup_scatter(ar); 779 return ret; 780 } 781 782 ath6kl_dbg(ATH6KL_DBG_BOOT, 783 "virtual scatter enabled requests %d entries %d\n", 784 ATH6KL_SCATTER_REQS, ATH6KL_SCATTER_ENTRIES_PER_REQ); 785 786 target->max_scat_entries = ATH6KL_SCATTER_ENTRIES_PER_REQ; 787 target->max_xfer_szper_scatreq = 788 ATH6KL_MAX_TRANSFER_SIZE_PER_SCATTER; 789 } 790 791 return 0; 792} 793 794static int ath6kl_sdio_config(struct ath6kl *ar) 795{ 796 struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar); 797 struct sdio_func *func = ar_sdio->func; 798 int ret; 799 800 sdio_claim_host(func); 801 802 if (ar_sdio->id->device >= SDIO_DEVICE_ID_ATHEROS_AR6003_00) { 803 /* enable 4-bit ASYNC interrupt on AR6003 or later */ 804 ret = ath6kl_sdio_func0_cmd52_wr_byte(func->card, 805 CCCR_SDIO_IRQ_MODE_REG, 806 SDIO_IRQ_MODE_ASYNC_4BIT_IRQ); 807 if (ret) { 808 ath6kl_err("Failed to enable 4-bit async irq mode %d\n", 809 ret); 810 goto out; 811 } 812 813 ath6kl_dbg(ATH6KL_DBG_BOOT, "4-bit async irq mode enabled\n"); 814 } 815 816 /* give us some time to enable, in ms */ 817 func->enable_timeout = 100; 818 819 ret = sdio_set_block_size(func, HIF_MBOX_BLOCK_SIZE); 820 if (ret) { 821 ath6kl_err("Set sdio block size %d failed: %d)\n", 822 HIF_MBOX_BLOCK_SIZE, ret); 823 goto out; 824 } 825 826out: 827 sdio_release_host(func); 828 829 return ret; 830} 831 832static int ath6kl_set_sdio_pm_caps(struct ath6kl *ar) 833{ 834 struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar); 835 struct sdio_func *func = ar_sdio->func; 836 mmc_pm_flag_t flags; 837 int ret; 838 839 flags = sdio_get_host_pm_caps(func); 840 841 ath6kl_dbg(ATH6KL_DBG_SUSPEND, "sdio suspend pm_caps 0x%x\n", flags); 842 843 if (!(flags & MMC_PM_WAKE_SDIO_IRQ) || 844 !(flags & MMC_PM_KEEP_POWER)) 845 return -EINVAL; 846 847 ret = sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER); 848 if (ret) { 849 ath6kl_err("set sdio keep pwr flag failed: %d\n", ret); 850 return ret; 851 } 852 853 /* sdio irq wakes up host */ 854 ret = sdio_set_host_pm_flags(func, MMC_PM_WAKE_SDIO_IRQ); 855 if (ret) 856 ath6kl_err("set sdio wake irq flag failed: %d\n", ret); 857 858 return ret; 859} 860 861static int ath6kl_sdio_suspend(struct ath6kl *ar, struct cfg80211_wowlan *wow) 862{ 863 struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar); 864 struct sdio_func *func = ar_sdio->func; 865 mmc_pm_flag_t flags; 866 bool try_deepsleep = false; 867 int ret; 868 869 if (ar->suspend_mode == WLAN_POWER_STATE_WOW || 870 (!ar->suspend_mode && wow)) { 871 ret = ath6kl_set_sdio_pm_caps(ar); 872 if (ret) 873 goto cut_pwr; 874 875 ret = ath6kl_cfg80211_suspend(ar, ATH6KL_CFG_SUSPEND_WOW, wow); 876 if (ret && ret != -ENOTCONN) 877 ath6kl_err("wow suspend failed: %d\n", ret); 878 879 if (ret && 880 (!ar->wow_suspend_mode || 881 ar->wow_suspend_mode == WLAN_POWER_STATE_DEEP_SLEEP)) 882 try_deepsleep = true; 883 else if (ret && 884 ar->wow_suspend_mode == WLAN_POWER_STATE_CUT_PWR) 885 goto cut_pwr; 886 if (!ret) 887 return 0; 888 } 889 890 if (ar->suspend_mode == WLAN_POWER_STATE_DEEP_SLEEP || 891 !ar->suspend_mode || try_deepsleep) { 892 flags = sdio_get_host_pm_caps(func); 893 if (!(flags & MMC_PM_KEEP_POWER)) 894 goto cut_pwr; 895 896 ret = sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER); 897 if (ret) 898 goto cut_pwr; 899 900 /* 901 * Workaround to support Deep Sleep with MSM, set the host pm 902 * flag as MMC_PM_WAKE_SDIO_IRQ to allow SDCC deiver to disable 903 * the sdc2_clock and internally allows MSM to enter 904 * TCXO shutdown properly. 905 */ 906 if ((flags & MMC_PM_WAKE_SDIO_IRQ)) { 907 ret = sdio_set_host_pm_flags(func, 908 MMC_PM_WAKE_SDIO_IRQ); 909 if (ret) 910 goto cut_pwr; 911 } 912 913 ret = ath6kl_cfg80211_suspend(ar, ATH6KL_CFG_SUSPEND_DEEPSLEEP, 914 NULL); 915 if (ret) 916 goto cut_pwr; 917 918 return 0; 919 } 920 921cut_pwr: 922 if (func->card && func->card->host) 923 func->card->host->pm_flags &= ~MMC_PM_KEEP_POWER; 924 925 return ath6kl_cfg80211_suspend(ar, ATH6KL_CFG_SUSPEND_CUTPOWER, NULL); 926} 927 928static int ath6kl_sdio_resume(struct ath6kl *ar) 929{ 930 switch (ar->state) { 931 case ATH6KL_STATE_OFF: 932 case ATH6KL_STATE_CUTPOWER: 933 ath6kl_dbg(ATH6KL_DBG_SUSPEND, 934 "sdio resume configuring sdio\n"); 935 936 /* need to set sdio settings after power is cut from sdio */ 937 ath6kl_sdio_config(ar); 938 break; 939 940 case ATH6KL_STATE_ON: 941 break; 942 943 case ATH6KL_STATE_DEEPSLEEP: 944 break; 945 946 case ATH6KL_STATE_WOW: 947 break; 948 949 case ATH6KL_STATE_SUSPENDING: 950 break; 951 952 case ATH6KL_STATE_RESUMING: 953 break; 954 955 case ATH6KL_STATE_RECOVERY: 956 break; 957 } 958 959 ath6kl_cfg80211_resume(ar); 960 961 return 0; 962} 963 964/* set the window address register (using 4-byte register access ). */ 965static int ath6kl_set_addrwin_reg(struct ath6kl *ar, u32 reg_addr, u32 addr) 966{ 967 int status; 968 u8 addr_val[4]; 969 s32 i; 970 971 /* 972 * Write bytes 1,2,3 of the register to set the upper address bytes, 973 * the LSB is written last to initiate the access cycle 974 */ 975 976 for (i = 1; i <= 3; i++) { 977 /* 978 * Fill the buffer with the address byte value we want to 979 * hit 4 times. 980 */ 981 memset(addr_val, ((u8 *)&addr)[i], 4); 982 983 /* 984 * Hit each byte of the register address with a 4-byte 985 * write operation to the same address, this is a harmless 986 * operation. 987 */ 988 status = ath6kl_sdio_read_write_sync(ar, reg_addr + i, addr_val, 989 4, HIF_WR_SYNC_BYTE_FIX); 990 if (status) 991 break; 992 } 993 994 if (status) { 995 ath6kl_err("%s: failed to write initial bytes of 0x%x to window reg: 0x%X\n", 996 __func__, addr, reg_addr); 997 return status; 998 } 999 1000 /* 1001 * Write the address register again, this time write the whole 1002 * 4-byte value. The effect here is that the LSB write causes the 1003 * cycle to start, the extra 3 byte write to bytes 1,2,3 has no 1004 * effect since we are writing the same values again 1005 */ 1006 status = ath6kl_sdio_read_write_sync(ar, reg_addr, (u8 *)(&addr), 1007 4, HIF_WR_SYNC_BYTE_INC); 1008 1009 if (status) { 1010 ath6kl_err("%s: failed to write 0x%x to window reg: 0x%X\n", 1011 __func__, addr, reg_addr); 1012 return status; 1013 } 1014 1015 return 0; 1016} 1017 1018static int ath6kl_sdio_diag_read32(struct ath6kl *ar, u32 address, u32 *data) 1019{ 1020 int status; 1021 1022 /* set window register to start read cycle */ 1023 status = ath6kl_set_addrwin_reg(ar, WINDOW_READ_ADDR_ADDRESS, 1024 address); 1025 1026 if (status) 1027 return status; 1028 1029 /* read the data */ 1030 status = ath6kl_sdio_read_write_sync(ar, WINDOW_DATA_ADDRESS, 1031 (u8 *)data, sizeof(u32), HIF_RD_SYNC_BYTE_INC); 1032 if (status) { 1033 ath6kl_err("%s: failed to read from window data addr\n", 1034 __func__); 1035 return status; 1036 } 1037 1038 return status; 1039} 1040 1041static int ath6kl_sdio_diag_write32(struct ath6kl *ar, u32 address, 1042 __le32 data) 1043{ 1044 int status; 1045 u32 val = (__force u32) data; 1046 1047 /* set write data */ 1048 status = ath6kl_sdio_read_write_sync(ar, WINDOW_DATA_ADDRESS, 1049 (u8 *) &val, sizeof(u32), HIF_WR_SYNC_BYTE_INC); 1050 if (status) { 1051 ath6kl_err("%s: failed to write 0x%x to window data addr\n", 1052 __func__, data); 1053 return status; 1054 } 1055 1056 /* set window register, which starts the write cycle */ 1057 return ath6kl_set_addrwin_reg(ar, WINDOW_WRITE_ADDR_ADDRESS, 1058 address); 1059} 1060 1061static int ath6kl_sdio_bmi_credits(struct ath6kl *ar) 1062{ 1063 u32 addr; 1064 unsigned long timeout; 1065 int ret; 1066 1067 ar->bmi.cmd_credits = 0; 1068 1069 /* Read the counter register to get the command credits */ 1070 addr = COUNT_DEC_ADDRESS + (HTC_MAILBOX_NUM_MAX + ENDPOINT1) * 4; 1071 1072 timeout = jiffies + msecs_to_jiffies(BMI_COMMUNICATION_TIMEOUT); 1073 while (time_before(jiffies, timeout) && !ar->bmi.cmd_credits) { 1074 /* 1075 * Hit the credit counter with a 4-byte access, the first byte 1076 * read will hit the counter and cause a decrement, while the 1077 * remaining 3 bytes has no effect. The rationale behind this 1078 * is to make all HIF accesses 4-byte aligned. 1079 */ 1080 ret = ath6kl_sdio_read_write_sync(ar, addr, 1081 (u8 *)&ar->bmi.cmd_credits, 4, 1082 HIF_RD_SYNC_BYTE_INC); 1083 if (ret) { 1084 ath6kl_err("Unable to decrement the command credit count register: %d\n", 1085 ret); 1086 return ret; 1087 } 1088 1089 /* The counter is only 8 bits. 1090 * Ignore anything in the upper 3 bytes 1091 */ 1092 ar->bmi.cmd_credits &= 0xFF; 1093 } 1094 1095 if (!ar->bmi.cmd_credits) { 1096 ath6kl_err("bmi communication timeout\n"); 1097 return -ETIMEDOUT; 1098 } 1099 1100 return 0; 1101} 1102 1103static int ath6kl_bmi_get_rx_lkahd(struct ath6kl *ar) 1104{ 1105 unsigned long timeout; 1106 u32 rx_word = 0; 1107 int ret = 0; 1108 1109 timeout = jiffies + msecs_to_jiffies(BMI_COMMUNICATION_TIMEOUT); 1110 while ((time_before(jiffies, timeout)) && !rx_word) { 1111 ret = ath6kl_sdio_read_write_sync(ar, 1112 RX_LOOKAHEAD_VALID_ADDRESS, 1113 (u8 *)&rx_word, sizeof(rx_word), 1114 HIF_RD_SYNC_BYTE_INC); 1115 if (ret) { 1116 ath6kl_err("unable to read RX_LOOKAHEAD_VALID\n"); 1117 return ret; 1118 } 1119 1120 /* all we really want is one bit */ 1121 rx_word &= (1 << ENDPOINT1); 1122 } 1123 1124 if (!rx_word) { 1125 ath6kl_err("bmi_recv_buf FIFO empty\n"); 1126 return -EINVAL; 1127 } 1128 1129 return ret; 1130} 1131 1132static int ath6kl_sdio_bmi_write(struct ath6kl *ar, u8 *buf, u32 len) 1133{ 1134 int ret; 1135 u32 addr; 1136 1137 ret = ath6kl_sdio_bmi_credits(ar); 1138 if (ret) 1139 return ret; 1140 1141 addr = ar->mbox_info.htc_addr; 1142 1143 ret = ath6kl_sdio_read_write_sync(ar, addr, buf, len, 1144 HIF_WR_SYNC_BYTE_INC); 1145 if (ret) { 1146 ath6kl_err("unable to send the bmi data to the device\n"); 1147 return ret; 1148 } 1149 1150 return 0; 1151} 1152 1153static int ath6kl_sdio_bmi_read(struct ath6kl *ar, u8 *buf, u32 len) 1154{ 1155 int ret; 1156 u32 addr; 1157 1158 /* 1159 * During normal bootup, small reads may be required. 1160 * Rather than issue an HIF Read and then wait as the Target 1161 * adds successive bytes to the FIFO, we wait here until 1162 * we know that response data is available. 1163 * 1164 * This allows us to cleanly timeout on an unexpected 1165 * Target failure rather than risk problems at the HIF level. 1166 * In particular, this avoids SDIO timeouts and possibly garbage 1167 * data on some host controllers. And on an interconnect 1168 * such as Compact Flash (as well as some SDIO masters) which 1169 * does not provide any indication on data timeout, it avoids 1170 * a potential hang or garbage response. 1171 * 1172 * Synchronization is more difficult for reads larger than the 1173 * size of the MBOX FIFO (128B), because the Target is unable 1174 * to push the 129th byte of data until AFTER the Host posts an 1175 * HIF Read and removes some FIFO data. So for large reads the 1176 * Host proceeds to post an HIF Read BEFORE all the data is 1177 * actually available to read. Fortunately, large BMI reads do 1178 * not occur in practice -- they're supported for debug/development. 1179 * 1180 * So Host/Target BMI synchronization is divided into these cases: 1181 * CASE 1: length < 4 1182 * Should not happen 1183 * 1184 * CASE 2: 4 <= length <= 128 1185 * Wait for first 4 bytes to be in FIFO 1186 * If CONSERVATIVE_BMI_READ is enabled, also wait for 1187 * a BMI command credit, which indicates that the ENTIRE 1188 * response is available in the FIFO 1189 * 1190 * CASE 3: length > 128 1191 * Wait for the first 4 bytes to be in FIFO 1192 * 1193 * For most uses, a small timeout should be sufficient and we will 1194 * usually see a response quickly; but there may be some unusual 1195 * (debug) cases of BMI_EXECUTE where we want an larger timeout. 1196 * For now, we use an unbounded busy loop while waiting for 1197 * BMI_EXECUTE. 1198 * 1199 * If BMI_EXECUTE ever needs to support longer-latency execution, 1200 * especially in production, this code needs to be enhanced to sleep 1201 * and yield. Also note that BMI_COMMUNICATION_TIMEOUT is currently 1202 * a function of Host processor speed. 1203 */ 1204 if (len >= 4) { /* NB: Currently, always true */ 1205 ret = ath6kl_bmi_get_rx_lkahd(ar); 1206 if (ret) 1207 return ret; 1208 } 1209 1210 addr = ar->mbox_info.htc_addr; 1211 ret = ath6kl_sdio_read_write_sync(ar, addr, buf, len, 1212 HIF_RD_SYNC_BYTE_INC); 1213 if (ret) { 1214 ath6kl_err("Unable to read the bmi data from the device: %d\n", 1215 ret); 1216 return ret; 1217 } 1218 1219 return 0; 1220} 1221 1222static void ath6kl_sdio_stop(struct ath6kl *ar) 1223{ 1224 struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar); 1225 struct bus_request *req, *tmp_req; 1226 void *context; 1227 1228 /* FIXME: make sure that wq is not queued again */ 1229 1230 cancel_work_sync(&ar_sdio->wr_async_work); 1231 1232 spin_lock_bh(&ar_sdio->wr_async_lock); 1233 1234 list_for_each_entry_safe(req, tmp_req, &ar_sdio->wr_asyncq, list) { 1235 list_del(&req->list); 1236 1237 if (req->scat_req) { 1238 /* this is a scatter gather request */ 1239 req->scat_req->status = -ECANCELED; 1240 req->scat_req->complete(ar_sdio->ar->htc_target, 1241 req->scat_req); 1242 } else { 1243 context = req->packet; 1244 ath6kl_sdio_free_bus_req(ar_sdio, req); 1245 ath6kl_hif_rw_comp_handler(context, -ECANCELED); 1246 } 1247 } 1248 1249 spin_unlock_bh(&ar_sdio->wr_async_lock); 1250 1251 WARN_ON(get_queue_depth(&ar_sdio->scat_req) != 4); 1252} 1253 1254static const struct ath6kl_hif_ops ath6kl_sdio_ops = { 1255 .read_write_sync = ath6kl_sdio_read_write_sync, 1256 .write_async = ath6kl_sdio_write_async, 1257 .irq_enable = ath6kl_sdio_irq_enable, 1258 .irq_disable = ath6kl_sdio_irq_disable, 1259 .scatter_req_get = ath6kl_sdio_scatter_req_get, 1260 .scatter_req_add = ath6kl_sdio_scatter_req_add, 1261 .enable_scatter = ath6kl_sdio_enable_scatter, 1262 .scat_req_rw = ath6kl_sdio_async_rw_scatter, 1263 .cleanup_scatter = ath6kl_sdio_cleanup_scatter, 1264 .suspend = ath6kl_sdio_suspend, 1265 .resume = ath6kl_sdio_resume, 1266 .diag_read32 = ath6kl_sdio_diag_read32, 1267 .diag_write32 = ath6kl_sdio_diag_write32, 1268 .bmi_read = ath6kl_sdio_bmi_read, 1269 .bmi_write = ath6kl_sdio_bmi_write, 1270 .power_on = ath6kl_sdio_power_on, 1271 .power_off = ath6kl_sdio_power_off, 1272 .stop = ath6kl_sdio_stop, 1273}; 1274 1275#ifdef CONFIG_PM_SLEEP 1276 1277/* 1278 * Empty handlers so that mmc subsystem doesn't remove us entirely during 1279 * suspend. We instead follow cfg80211 suspend/resume handlers. 1280 */ 1281static int ath6kl_sdio_pm_suspend(struct device *device) 1282{ 1283 ath6kl_dbg(ATH6KL_DBG_SUSPEND, "sdio pm suspend\n"); 1284 1285 return 0; 1286} 1287 1288static int ath6kl_sdio_pm_resume(struct device *device) 1289{ 1290 ath6kl_dbg(ATH6KL_DBG_SUSPEND, "sdio pm resume\n"); 1291 1292 return 0; 1293} 1294 1295static SIMPLE_DEV_PM_OPS(ath6kl_sdio_pm_ops, ath6kl_sdio_pm_suspend, 1296 ath6kl_sdio_pm_resume); 1297 1298#define ATH6KL_SDIO_PM_OPS (&ath6kl_sdio_pm_ops) 1299 1300#else 1301 1302#define ATH6KL_SDIO_PM_OPS NULL 1303 1304#endif /* CONFIG_PM_SLEEP */ 1305 1306static int ath6kl_sdio_probe(struct sdio_func *func, 1307 const struct sdio_device_id *id) 1308{ 1309 int ret; 1310 struct ath6kl_sdio *ar_sdio; 1311 struct ath6kl *ar; 1312 int count; 1313 1314 ath6kl_dbg(ATH6KL_DBG_BOOT, 1315 "sdio new func %d vendor 0x%x device 0x%x block 0x%x/0x%x\n", 1316 func->num, func->vendor, func->device, 1317 func->max_blksize, func->cur_blksize); 1318 1319 ar_sdio = kzalloc(sizeof(struct ath6kl_sdio), GFP_KERNEL); 1320 if (!ar_sdio) 1321 return -ENOMEM; 1322 1323 ar_sdio->dma_buffer = kzalloc(HIF_DMA_BUFFER_SIZE, GFP_KERNEL); 1324 if (!ar_sdio->dma_buffer) { 1325 ret = -ENOMEM; 1326 goto err_hif; 1327 } 1328 1329 ar_sdio->func = func; 1330 sdio_set_drvdata(func, ar_sdio); 1331 1332 ar_sdio->id = id; 1333 ar_sdio->is_disabled = true; 1334 1335 spin_lock_init(&ar_sdio->lock); 1336 spin_lock_init(&ar_sdio->scat_lock); 1337 spin_lock_init(&ar_sdio->wr_async_lock); 1338 mutex_init(&ar_sdio->dma_buffer_mutex); 1339 1340 INIT_LIST_HEAD(&ar_sdio->scat_req); 1341 INIT_LIST_HEAD(&ar_sdio->bus_req_freeq); 1342 INIT_LIST_HEAD(&ar_sdio->wr_asyncq); 1343 1344 INIT_WORK(&ar_sdio->wr_async_work, ath6kl_sdio_write_async_work); 1345 1346 init_waitqueue_head(&ar_sdio->irq_wq); 1347 1348 for (count = 0; count < BUS_REQUEST_MAX_NUM; count++) 1349 ath6kl_sdio_free_bus_req(ar_sdio, &ar_sdio->bus_req[count]); 1350 1351 ar = ath6kl_core_create(&ar_sdio->func->dev); 1352 if (!ar) { 1353 ath6kl_err("Failed to alloc ath6kl core\n"); 1354 ret = -ENOMEM; 1355 goto err_dma; 1356 } 1357 1358 ar_sdio->ar = ar; 1359 ar->hif_type = ATH6KL_HIF_TYPE_SDIO; 1360 ar->hif_priv = ar_sdio; 1361 ar->hif_ops = &ath6kl_sdio_ops; 1362 ar->bmi.max_data_size = 256; 1363 1364 ath6kl_sdio_set_mbox_info(ar); 1365 1366 ret = ath6kl_sdio_config(ar); 1367 if (ret) { 1368 ath6kl_err("Failed to config sdio: %d\n", ret); 1369 goto err_core_alloc; 1370 } 1371 1372 ret = ath6kl_core_init(ar, ATH6KL_HTC_TYPE_MBOX); 1373 if (ret) { 1374 ath6kl_err("Failed to init ath6kl core\n"); 1375 goto err_core_alloc; 1376 } 1377 1378 return ret; 1379 1380err_core_alloc: 1381 ath6kl_core_destroy(ar_sdio->ar); 1382err_dma: 1383 kfree(ar_sdio->dma_buffer); 1384err_hif: 1385 kfree(ar_sdio); 1386 1387 return ret; 1388} 1389 1390static void ath6kl_sdio_remove(struct sdio_func *func) 1391{ 1392 struct ath6kl_sdio *ar_sdio; 1393 1394 ath6kl_dbg(ATH6KL_DBG_BOOT, 1395 "sdio removed func %d vendor 0x%x device 0x%x\n", 1396 func->num, func->vendor, func->device); 1397 1398 ar_sdio = sdio_get_drvdata(func); 1399 1400 ath6kl_stop_txrx(ar_sdio->ar); 1401 cancel_work_sync(&ar_sdio->wr_async_work); 1402 1403 ath6kl_core_cleanup(ar_sdio->ar); 1404 ath6kl_core_destroy(ar_sdio->ar); 1405 1406 kfree(ar_sdio->dma_buffer); 1407 kfree(ar_sdio); 1408} 1409 1410static const struct sdio_device_id ath6kl_sdio_devices[] = { 1411 {SDIO_DEVICE(SDIO_VENDOR_ID_ATHEROS, SDIO_DEVICE_ID_ATHEROS_AR6003_00)}, 1412 {SDIO_DEVICE(SDIO_VENDOR_ID_ATHEROS, SDIO_DEVICE_ID_ATHEROS_AR6003_01)}, 1413 {SDIO_DEVICE(SDIO_VENDOR_ID_ATHEROS, SDIO_DEVICE_ID_ATHEROS_AR6004_00)}, 1414 {SDIO_DEVICE(SDIO_VENDOR_ID_ATHEROS, SDIO_DEVICE_ID_ATHEROS_AR6004_01)}, 1415 {SDIO_DEVICE(SDIO_VENDOR_ID_ATHEROS, SDIO_DEVICE_ID_ATHEROS_AR6004_02)}, 1416 {SDIO_DEVICE(SDIO_VENDOR_ID_ATHEROS, SDIO_DEVICE_ID_ATHEROS_AR6004_18)}, 1417 {SDIO_DEVICE(SDIO_VENDOR_ID_ATHEROS, SDIO_DEVICE_ID_ATHEROS_AR6004_19)}, 1418 {}, 1419}; 1420 1421MODULE_DEVICE_TABLE(sdio, ath6kl_sdio_devices); 1422 1423static struct sdio_driver ath6kl_sdio_driver = { 1424 .name = "ath6kl_sdio", 1425 .id_table = ath6kl_sdio_devices, 1426 .probe = ath6kl_sdio_probe, 1427 .remove = ath6kl_sdio_remove, 1428 .drv.pm = ATH6KL_SDIO_PM_OPS, 1429}; 1430 1431static int __init ath6kl_sdio_init(void) 1432{ 1433 int ret; 1434 1435 ret = sdio_register_driver(&ath6kl_sdio_driver); 1436 if (ret) 1437 ath6kl_err("sdio driver registration failed: %d\n", ret); 1438 1439 return ret; 1440} 1441 1442static void __exit ath6kl_sdio_exit(void) 1443{ 1444 sdio_unregister_driver(&ath6kl_sdio_driver); 1445} 1446 1447module_init(ath6kl_sdio_init); 1448module_exit(ath6kl_sdio_exit); 1449 1450MODULE_AUTHOR("Atheros Communications, Inc."); 1451MODULE_DESCRIPTION("Driver support for Atheros AR600x SDIO devices"); 1452MODULE_LICENSE("Dual BSD/GPL"); 1453 1454MODULE_FIRMWARE(AR6003_HW_2_0_FW_DIR "/" AR6003_HW_2_0_OTP_FILE); 1455MODULE_FIRMWARE(AR6003_HW_2_0_FW_DIR "/" AR6003_HW_2_0_FIRMWARE_FILE); 1456MODULE_FIRMWARE(AR6003_HW_2_0_FW_DIR "/" AR6003_HW_2_0_PATCH_FILE); 1457MODULE_FIRMWARE(AR6003_HW_2_0_BOARD_DATA_FILE); 1458MODULE_FIRMWARE(AR6003_HW_2_0_DEFAULT_BOARD_DATA_FILE); 1459MODULE_FIRMWARE(AR6003_HW_2_1_1_FW_DIR "/" AR6003_HW_2_1_1_OTP_FILE); 1460MODULE_FIRMWARE(AR6003_HW_2_1_1_FW_DIR "/" AR6003_HW_2_1_1_FIRMWARE_FILE); 1461MODULE_FIRMWARE(AR6003_HW_2_1_1_FW_DIR "/" AR6003_HW_2_1_1_PATCH_FILE); 1462MODULE_FIRMWARE(AR6003_HW_2_1_1_BOARD_DATA_FILE); 1463MODULE_FIRMWARE(AR6003_HW_2_1_1_DEFAULT_BOARD_DATA_FILE); 1464MODULE_FIRMWARE(AR6004_HW_1_0_FW_DIR "/" AR6004_HW_1_0_FIRMWARE_FILE); 1465MODULE_FIRMWARE(AR6004_HW_1_0_BOARD_DATA_FILE); 1466MODULE_FIRMWARE(AR6004_HW_1_0_DEFAULT_BOARD_DATA_FILE); 1467MODULE_FIRMWARE(AR6004_HW_1_1_FW_DIR "/" AR6004_HW_1_1_FIRMWARE_FILE); 1468MODULE_FIRMWARE(AR6004_HW_1_1_BOARD_DATA_FILE); 1469MODULE_FIRMWARE(AR6004_HW_1_1_DEFAULT_BOARD_DATA_FILE); 1470MODULE_FIRMWARE(AR6004_HW_1_2_FW_DIR "/" AR6004_HW_1_2_FIRMWARE_FILE); 1471MODULE_FIRMWARE(AR6004_HW_1_2_BOARD_DATA_FILE); 1472MODULE_FIRMWARE(AR6004_HW_1_2_DEFAULT_BOARD_DATA_FILE); 1473MODULE_FIRMWARE(AR6004_HW_1_3_FW_DIR "/" AR6004_HW_1_3_FIRMWARE_FILE); 1474MODULE_FIRMWARE(AR6004_HW_1_3_BOARD_DATA_FILE); 1475MODULE_FIRMWARE(AR6004_HW_1_3_DEFAULT_BOARD_DATA_FILE); 1476