1 // SPDX-License-Identifier: ISC 2 /* 3 * Copyright (c) 2016-2017 Qualcomm Atheros, Inc. All rights reserved. 4 * Copyright (c) 2015 The Linux Foundation. All rights reserved. 5 */ 6 #include <linux/module.h> 7 #include <linux/of.h> 8 #include <linux/of_device.h> 9 #include <linux/clk.h> 10 #include <linux/reset.h> 11 #include "core.h" 12 #include "debug.h" 13 #include "pci.h" 14 #include "ahb.h" 15 16 static const struct of_device_id ath10k_ahb_of_match[] = { 17 { .compatible = "qcom,ipq4019-wifi", 18 .data = (void *)ATH10K_HW_QCA4019 19 }, 20 { } 21 }; 22 23 MODULE_DEVICE_TABLE(of, ath10k_ahb_of_match); 24 25 #define QCA4019_SRAM_ADDR 0x000C0000 26 #define QCA4019_SRAM_LEN 0x00040000 /* 256 kb */ 27 28 static inline struct ath10k_ahb *ath10k_ahb_priv(struct ath10k *ar) 29 { 30 return &((struct ath10k_pci *)ar->drv_priv)->ahb[0]; 31 } 32 33 static void ath10k_ahb_write32(struct ath10k *ar, u32 offset, u32 value) 34 { 35 struct ath10k_ahb *ar_ahb = ath10k_ahb_priv(ar); 36 37 iowrite32(value, ar_ahb->mem + offset); 38 } 39 40 static u32 ath10k_ahb_read32(struct ath10k *ar, u32 offset) 41 { 42 struct ath10k_ahb *ar_ahb = ath10k_ahb_priv(ar); 43 44 return ioread32(ar_ahb->mem + offset); 45 } 46 47 static u32 ath10k_ahb_gcc_read32(struct ath10k *ar, u32 offset) 48 { 49 struct ath10k_ahb *ar_ahb = ath10k_ahb_priv(ar); 50 51 return ioread32(ar_ahb->gcc_mem + offset); 52 } 53 54 static void ath10k_ahb_tcsr_write32(struct ath10k *ar, u32 offset, u32 value) 55 { 56 struct ath10k_ahb *ar_ahb = ath10k_ahb_priv(ar); 57 58 iowrite32(value, ar_ahb->tcsr_mem + offset); 59 } 60 61 static u32 ath10k_ahb_tcsr_read32(struct ath10k *ar, u32 offset) 62 { 63 struct ath10k_ahb *ar_ahb = ath10k_ahb_priv(ar); 64 65 return ioread32(ar_ahb->tcsr_mem + offset); 66 } 67 68 static u32 ath10k_ahb_soc_read32(struct ath10k *ar, u32 addr) 69 { 70 return ath10k_ahb_read32(ar, RTC_SOC_BASE_ADDRESS + addr); 71 } 72 73 static int ath10k_ahb_get_num_banks(struct ath10k *ar) 74 { 75 if (ar->hw_rev == ATH10K_HW_QCA4019) 76 return 1; 77 78 ath10k_warn(ar, "unknown number of banks, assuming 1\n"); 79 return 1; 80 } 81 82 static int ath10k_ahb_clock_init(struct ath10k *ar) 83 { 84 struct ath10k_ahb *ar_ahb = ath10k_ahb_priv(ar); 85 struct device *dev; 86 87 dev = &ar_ahb->pdev->dev; 88 89 ar_ahb->cmd_clk = devm_clk_get(dev, "wifi_wcss_cmd"); 90 if (IS_ERR_OR_NULL(ar_ahb->cmd_clk)) { 91 ath10k_err(ar, "failed to get cmd clk: %ld\n", 92 PTR_ERR(ar_ahb->cmd_clk)); 93 return ar_ahb->cmd_clk ? PTR_ERR(ar_ahb->cmd_clk) : -ENODEV; 94 } 95 96 ar_ahb->ref_clk = devm_clk_get(dev, "wifi_wcss_ref"); 97 if (IS_ERR_OR_NULL(ar_ahb->ref_clk)) { 98 ath10k_err(ar, "failed to get ref clk: %ld\n", 99 PTR_ERR(ar_ahb->ref_clk)); 100 return ar_ahb->ref_clk ? PTR_ERR(ar_ahb->ref_clk) : -ENODEV; 101 } 102 103 ar_ahb->rtc_clk = devm_clk_get(dev, "wifi_wcss_rtc"); 104 if (IS_ERR_OR_NULL(ar_ahb->rtc_clk)) { 105 ath10k_err(ar, "failed to get rtc clk: %ld\n", 106 PTR_ERR(ar_ahb->rtc_clk)); 107 return ar_ahb->rtc_clk ? PTR_ERR(ar_ahb->rtc_clk) : -ENODEV; 108 } 109 110 return 0; 111 } 112 113 static void ath10k_ahb_clock_deinit(struct ath10k *ar) 114 { 115 struct ath10k_ahb *ar_ahb = ath10k_ahb_priv(ar); 116 117 ar_ahb->cmd_clk = NULL; 118 ar_ahb->ref_clk = NULL; 119 ar_ahb->rtc_clk = NULL; 120 } 121 122 static int ath10k_ahb_clock_enable(struct ath10k *ar) 123 { 124 struct ath10k_ahb *ar_ahb = ath10k_ahb_priv(ar); 125 int ret; 126 127 if (IS_ERR_OR_NULL(ar_ahb->cmd_clk) || 128 IS_ERR_OR_NULL(ar_ahb->ref_clk) || 129 IS_ERR_OR_NULL(ar_ahb->rtc_clk)) { 130 ath10k_err(ar, "clock(s) is/are not initialized\n"); 131 ret = -EIO; 132 goto out; 133 } 134 135 ret = clk_prepare_enable(ar_ahb->cmd_clk); 136 if (ret) { 137 ath10k_err(ar, "failed to enable cmd clk: %d\n", ret); 138 goto out; 139 } 140 141 ret = clk_prepare_enable(ar_ahb->ref_clk); 142 if (ret) { 143 ath10k_err(ar, "failed to enable ref clk: %d\n", ret); 144 goto err_cmd_clk_disable; 145 } 146 147 ret = clk_prepare_enable(ar_ahb->rtc_clk); 148 if (ret) { 149 ath10k_err(ar, "failed to enable rtc clk: %d\n", ret); 150 goto err_ref_clk_disable; 151 } 152 153 return 0; 154 155 err_ref_clk_disable: 156 clk_disable_unprepare(ar_ahb->ref_clk); 157 158 err_cmd_clk_disable: 159 clk_disable_unprepare(ar_ahb->cmd_clk); 160 161 out: 162 return ret; 163 } 164 165 static void ath10k_ahb_clock_disable(struct ath10k *ar) 166 { 167 struct ath10k_ahb *ar_ahb = ath10k_ahb_priv(ar); 168 169 clk_disable_unprepare(ar_ahb->cmd_clk); 170 171 clk_disable_unprepare(ar_ahb->ref_clk); 172 173 clk_disable_unprepare(ar_ahb->rtc_clk); 174 } 175 176 static int ath10k_ahb_rst_ctrl_init(struct ath10k *ar) 177 { 178 struct ath10k_ahb *ar_ahb = ath10k_ahb_priv(ar); 179 struct device *dev; 180 181 dev = &ar_ahb->pdev->dev; 182 183 ar_ahb->core_cold_rst = devm_reset_control_get_exclusive(dev, 184 "wifi_core_cold"); 185 if (IS_ERR(ar_ahb->core_cold_rst)) { 186 ath10k_err(ar, "failed to get core cold rst ctrl: %ld\n", 187 PTR_ERR(ar_ahb->core_cold_rst)); 188 return PTR_ERR(ar_ahb->core_cold_rst); 189 } 190 191 ar_ahb->radio_cold_rst = devm_reset_control_get_exclusive(dev, 192 "wifi_radio_cold"); 193 if (IS_ERR(ar_ahb->radio_cold_rst)) { 194 ath10k_err(ar, "failed to get radio cold rst ctrl: %ld\n", 195 PTR_ERR(ar_ahb->radio_cold_rst)); 196 return PTR_ERR(ar_ahb->radio_cold_rst); 197 } 198 199 ar_ahb->radio_warm_rst = devm_reset_control_get_exclusive(dev, 200 "wifi_radio_warm"); 201 if (IS_ERR(ar_ahb->radio_warm_rst)) { 202 ath10k_err(ar, "failed to get radio warm rst ctrl: %ld\n", 203 PTR_ERR(ar_ahb->radio_warm_rst)); 204 return PTR_ERR(ar_ahb->radio_warm_rst); 205 } 206 207 ar_ahb->radio_srif_rst = devm_reset_control_get_exclusive(dev, 208 "wifi_radio_srif"); 209 if (IS_ERR(ar_ahb->radio_srif_rst)) { 210 ath10k_err(ar, "failed to get radio srif rst ctrl: %ld\n", 211 PTR_ERR(ar_ahb->radio_srif_rst)); 212 return PTR_ERR(ar_ahb->radio_srif_rst); 213 } 214 215 ar_ahb->cpu_init_rst = devm_reset_control_get_exclusive(dev, 216 "wifi_cpu_init"); 217 if (IS_ERR(ar_ahb->cpu_init_rst)) { 218 ath10k_err(ar, "failed to get cpu init rst ctrl: %ld\n", 219 PTR_ERR(ar_ahb->cpu_init_rst)); 220 return PTR_ERR(ar_ahb->cpu_init_rst); 221 } 222 223 return 0; 224 } 225 226 static void ath10k_ahb_rst_ctrl_deinit(struct ath10k *ar) 227 { 228 struct ath10k_ahb *ar_ahb = ath10k_ahb_priv(ar); 229 230 ar_ahb->core_cold_rst = NULL; 231 ar_ahb->radio_cold_rst = NULL; 232 ar_ahb->radio_warm_rst = NULL; 233 ar_ahb->radio_srif_rst = NULL; 234 ar_ahb->cpu_init_rst = NULL; 235 } 236 237 static int ath10k_ahb_release_reset(struct ath10k *ar) 238 { 239 struct ath10k_ahb *ar_ahb = ath10k_ahb_priv(ar); 240 int ret; 241 242 if (IS_ERR_OR_NULL(ar_ahb->radio_cold_rst) || 243 IS_ERR_OR_NULL(ar_ahb->radio_warm_rst) || 244 IS_ERR_OR_NULL(ar_ahb->radio_srif_rst) || 245 IS_ERR_OR_NULL(ar_ahb->cpu_init_rst)) { 246 ath10k_err(ar, "rst ctrl(s) is/are not initialized\n"); 247 return -EINVAL; 248 } 249 250 ret = reset_control_deassert(ar_ahb->radio_cold_rst); 251 if (ret) { 252 ath10k_err(ar, "failed to deassert radio cold rst: %d\n", ret); 253 return ret; 254 } 255 256 ret = reset_control_deassert(ar_ahb->radio_warm_rst); 257 if (ret) { 258 ath10k_err(ar, "failed to deassert radio warm rst: %d\n", ret); 259 return ret; 260 } 261 262 ret = reset_control_deassert(ar_ahb->radio_srif_rst); 263 if (ret) { 264 ath10k_err(ar, "failed to deassert radio srif rst: %d\n", ret); 265 return ret; 266 } 267 268 ret = reset_control_deassert(ar_ahb->cpu_init_rst); 269 if (ret) { 270 ath10k_err(ar, "failed to deassert cpu init rst: %d\n", ret); 271 return ret; 272 } 273 274 return 0; 275 } 276 277 static void ath10k_ahb_halt_axi_bus(struct ath10k *ar, u32 haltreq_reg, 278 u32 haltack_reg) 279 { 280 unsigned long timeout; 281 u32 val; 282 283 /* Issue halt axi bus request */ 284 val = ath10k_ahb_tcsr_read32(ar, haltreq_reg); 285 val |= AHB_AXI_BUS_HALT_REQ; 286 ath10k_ahb_tcsr_write32(ar, haltreq_reg, val); 287 288 /* Wait for axi bus halted ack */ 289 timeout = jiffies + msecs_to_jiffies(ATH10K_AHB_AXI_BUS_HALT_TIMEOUT); 290 do { 291 val = ath10k_ahb_tcsr_read32(ar, haltack_reg); 292 if (val & AHB_AXI_BUS_HALT_ACK) 293 break; 294 295 mdelay(1); 296 } while (time_before(jiffies, timeout)); 297 298 if (!(val & AHB_AXI_BUS_HALT_ACK)) { 299 ath10k_err(ar, "failed to halt axi bus: %d\n", val); 300 return; 301 } 302 303 ath10k_dbg(ar, ATH10K_DBG_AHB, "axi bus halted\n"); 304 } 305 306 static void ath10k_ahb_halt_chip(struct ath10k *ar) 307 { 308 struct ath10k_ahb *ar_ahb = ath10k_ahb_priv(ar); 309 u32 core_id, glb_cfg_reg, haltreq_reg, haltack_reg; 310 u32 val; 311 int ret; 312 313 if (IS_ERR_OR_NULL(ar_ahb->core_cold_rst) || 314 IS_ERR_OR_NULL(ar_ahb->radio_cold_rst) || 315 IS_ERR_OR_NULL(ar_ahb->radio_warm_rst) || 316 IS_ERR_OR_NULL(ar_ahb->radio_srif_rst) || 317 IS_ERR_OR_NULL(ar_ahb->cpu_init_rst)) { 318 ath10k_err(ar, "rst ctrl(s) is/are not initialized\n"); 319 return; 320 } 321 322 core_id = ath10k_ahb_read32(ar, ATH10K_AHB_WLAN_CORE_ID_REG); 323 324 switch (core_id) { 325 case 0: 326 glb_cfg_reg = ATH10K_AHB_TCSR_WIFI0_GLB_CFG; 327 haltreq_reg = ATH10K_AHB_TCSR_WCSS0_HALTREQ; 328 haltack_reg = ATH10K_AHB_TCSR_WCSS0_HALTACK; 329 break; 330 case 1: 331 glb_cfg_reg = ATH10K_AHB_TCSR_WIFI1_GLB_CFG; 332 haltreq_reg = ATH10K_AHB_TCSR_WCSS1_HALTREQ; 333 haltack_reg = ATH10K_AHB_TCSR_WCSS1_HALTACK; 334 break; 335 default: 336 ath10k_err(ar, "invalid core id %d found, skipping reset sequence\n", 337 core_id); 338 return; 339 } 340 341 ath10k_ahb_halt_axi_bus(ar, haltreq_reg, haltack_reg); 342 343 val = ath10k_ahb_tcsr_read32(ar, glb_cfg_reg); 344 val |= TCSR_WIFIX_GLB_CFG_DISABLE_CORE_CLK; 345 ath10k_ahb_tcsr_write32(ar, glb_cfg_reg, val); 346 347 ret = reset_control_assert(ar_ahb->core_cold_rst); 348 if (ret) 349 ath10k_err(ar, "failed to assert core cold rst: %d\n", ret); 350 msleep(1); 351 352 ret = reset_control_assert(ar_ahb->radio_cold_rst); 353 if (ret) 354 ath10k_err(ar, "failed to assert radio cold rst: %d\n", ret); 355 msleep(1); 356 357 ret = reset_control_assert(ar_ahb->radio_warm_rst); 358 if (ret) 359 ath10k_err(ar, "failed to assert radio warm rst: %d\n", ret); 360 msleep(1); 361 362 ret = reset_control_assert(ar_ahb->radio_srif_rst); 363 if (ret) 364 ath10k_err(ar, "failed to assert radio srif rst: %d\n", ret); 365 msleep(1); 366 367 ret = reset_control_assert(ar_ahb->cpu_init_rst); 368 if (ret) 369 ath10k_err(ar, "failed to assert cpu init rst: %d\n", ret); 370 msleep(10); 371 372 /* Clear halt req and core clock disable req before 373 * deasserting wifi core reset. 374 */ 375 val = ath10k_ahb_tcsr_read32(ar, haltreq_reg); 376 val &= ~AHB_AXI_BUS_HALT_REQ; 377 ath10k_ahb_tcsr_write32(ar, haltreq_reg, val); 378 379 val = ath10k_ahb_tcsr_read32(ar, glb_cfg_reg); 380 val &= ~TCSR_WIFIX_GLB_CFG_DISABLE_CORE_CLK; 381 ath10k_ahb_tcsr_write32(ar, glb_cfg_reg, val); 382 383 ret = reset_control_deassert(ar_ahb->core_cold_rst); 384 if (ret) 385 ath10k_err(ar, "failed to deassert core cold rst: %d\n", ret); 386 387 ath10k_dbg(ar, ATH10K_DBG_AHB, "core %d reset done\n", core_id); 388 } 389 390 static irqreturn_t ath10k_ahb_interrupt_handler(int irq, void *arg) 391 { 392 struct ath10k *ar = arg; 393 394 if (!ath10k_pci_irq_pending(ar)) 395 return IRQ_NONE; 396 397 ath10k_pci_disable_and_clear_legacy_irq(ar); 398 ath10k_pci_irq_msi_fw_mask(ar); 399 napi_schedule(&ar->napi); 400 401 return IRQ_HANDLED; 402 } 403 404 static int ath10k_ahb_request_irq_legacy(struct ath10k *ar) 405 { 406 struct ath10k_pci *ar_pci = ath10k_pci_priv(ar); 407 struct ath10k_ahb *ar_ahb = ath10k_ahb_priv(ar); 408 int ret; 409 410 ret = request_irq(ar_ahb->irq, 411 ath10k_ahb_interrupt_handler, 412 IRQF_SHARED, "ath10k_ahb", ar); 413 if (ret) { 414 ath10k_warn(ar, "failed to request legacy irq %d: %d\n", 415 ar_ahb->irq, ret); 416 return ret; 417 } 418 ar_pci->oper_irq_mode = ATH10K_PCI_IRQ_LEGACY; 419 420 return 0; 421 } 422 423 static void ath10k_ahb_release_irq_legacy(struct ath10k *ar) 424 { 425 struct ath10k_ahb *ar_ahb = ath10k_ahb_priv(ar); 426 427 free_irq(ar_ahb->irq, ar); 428 } 429 430 static void ath10k_ahb_irq_disable(struct ath10k *ar) 431 { 432 ath10k_ce_disable_interrupts(ar); 433 ath10k_pci_disable_and_clear_legacy_irq(ar); 434 } 435 436 static int ath10k_ahb_resource_init(struct ath10k *ar) 437 { 438 struct ath10k_ahb *ar_ahb = ath10k_ahb_priv(ar); 439 struct platform_device *pdev; 440 struct resource *res; 441 int ret; 442 443 pdev = ar_ahb->pdev; 444 445 ar_ahb->mem = devm_platform_get_and_ioremap_resource(pdev, 0, &res); 446 if (IS_ERR(ar_ahb->mem)) { 447 ath10k_err(ar, "mem ioremap error\n"); 448 ret = PTR_ERR(ar_ahb->mem); 449 goto out; 450 } 451 452 ar_ahb->mem_len = resource_size(res); 453 454 ar_ahb->gcc_mem = ioremap(ATH10K_GCC_REG_BASE, 455 ATH10K_GCC_REG_SIZE); 456 if (!ar_ahb->gcc_mem) { 457 ath10k_err(ar, "gcc mem ioremap error\n"); 458 ret = -ENOMEM; 459 goto err_mem_unmap; 460 } 461 462 ar_ahb->tcsr_mem = ioremap(ATH10K_TCSR_REG_BASE, 463 ATH10K_TCSR_REG_SIZE); 464 if (!ar_ahb->tcsr_mem) { 465 ath10k_err(ar, "tcsr mem ioremap error\n"); 466 ret = -ENOMEM; 467 goto err_gcc_mem_unmap; 468 } 469 470 ret = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32)); 471 if (ret) { 472 ath10k_err(ar, "failed to set 32-bit dma mask: %d\n", ret); 473 goto err_tcsr_mem_unmap; 474 } 475 476 ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32)); 477 if (ret) { 478 ath10k_err(ar, "failed to set 32-bit consistent dma: %d\n", 479 ret); 480 goto err_tcsr_mem_unmap; 481 } 482 483 ret = ath10k_ahb_clock_init(ar); 484 if (ret) 485 goto err_tcsr_mem_unmap; 486 487 ret = ath10k_ahb_rst_ctrl_init(ar); 488 if (ret) 489 goto err_clock_deinit; 490 491 ar_ahb->irq = platform_get_irq_byname(pdev, "legacy"); 492 if (ar_ahb->irq < 0) { 493 ath10k_err(ar, "failed to get irq number: %d\n", ar_ahb->irq); 494 ret = ar_ahb->irq; 495 goto err_clock_deinit; 496 } 497 498 ath10k_dbg(ar, ATH10K_DBG_BOOT, "irq: %d\n", ar_ahb->irq); 499 500 ath10k_dbg(ar, ATH10K_DBG_BOOT, "mem: 0x%pK mem_len: %lu gcc mem: 0x%pK tcsr_mem: 0x%pK\n", 501 ar_ahb->mem, ar_ahb->mem_len, 502 ar_ahb->gcc_mem, ar_ahb->tcsr_mem); 503 return 0; 504 505 err_clock_deinit: 506 ath10k_ahb_clock_deinit(ar); 507 508 err_tcsr_mem_unmap: 509 iounmap(ar_ahb->tcsr_mem); 510 511 err_gcc_mem_unmap: 512 ar_ahb->tcsr_mem = NULL; 513 iounmap(ar_ahb->gcc_mem); 514 515 err_mem_unmap: 516 ar_ahb->gcc_mem = NULL; 517 devm_iounmap(&pdev->dev, ar_ahb->mem); 518 519 out: 520 ar_ahb->mem = NULL; 521 return ret; 522 } 523 524 static void ath10k_ahb_resource_deinit(struct ath10k *ar) 525 { 526 struct ath10k_ahb *ar_ahb = ath10k_ahb_priv(ar); 527 struct device *dev; 528 529 dev = &ar_ahb->pdev->dev; 530 531 if (ar_ahb->mem) 532 devm_iounmap(dev, ar_ahb->mem); 533 534 if (ar_ahb->gcc_mem) 535 iounmap(ar_ahb->gcc_mem); 536 537 if (ar_ahb->tcsr_mem) 538 iounmap(ar_ahb->tcsr_mem); 539 540 ar_ahb->mem = NULL; 541 ar_ahb->gcc_mem = NULL; 542 ar_ahb->tcsr_mem = NULL; 543 544 ath10k_ahb_clock_deinit(ar); 545 ath10k_ahb_rst_ctrl_deinit(ar); 546 } 547 548 static int ath10k_ahb_prepare_device(struct ath10k *ar) 549 { 550 u32 val; 551 int ret; 552 553 ret = ath10k_ahb_clock_enable(ar); 554 if (ret) { 555 ath10k_err(ar, "failed to enable clocks\n"); 556 return ret; 557 } 558 559 /* Clock for the target is supplied from outside of target (ie, 560 * external clock module controlled by the host). Target needs 561 * to know what frequency target cpu is configured which is needed 562 * for target internal use. Read target cpu frequency info from 563 * gcc register and write into target's scratch register where 564 * target expects this information. 565 */ 566 val = ath10k_ahb_gcc_read32(ar, ATH10K_AHB_GCC_FEPLL_PLL_DIV); 567 ath10k_ahb_write32(ar, ATH10K_AHB_WIFI_SCRATCH_5_REG, val); 568 569 ret = ath10k_ahb_release_reset(ar); 570 if (ret) 571 goto err_clk_disable; 572 573 ath10k_ahb_irq_disable(ar); 574 575 ath10k_ahb_write32(ar, FW_INDICATOR_ADDRESS, FW_IND_HOST_READY); 576 577 ret = ath10k_pci_wait_for_target_init(ar); 578 if (ret) 579 goto err_halt_chip; 580 581 return 0; 582 583 err_halt_chip: 584 ath10k_ahb_halt_chip(ar); 585 586 err_clk_disable: 587 ath10k_ahb_clock_disable(ar); 588 589 return ret; 590 } 591 592 static int ath10k_ahb_chip_reset(struct ath10k *ar) 593 { 594 int ret; 595 596 ath10k_ahb_halt_chip(ar); 597 ath10k_ahb_clock_disable(ar); 598 599 ret = ath10k_ahb_prepare_device(ar); 600 if (ret) 601 return ret; 602 603 return 0; 604 } 605 606 static int ath10k_ahb_wake_target_cpu(struct ath10k *ar) 607 { 608 u32 addr, val; 609 610 addr = SOC_CORE_BASE_ADDRESS | CORE_CTRL_ADDRESS; 611 val = ath10k_ahb_read32(ar, addr); 612 val |= ATH10K_AHB_CORE_CTRL_CPU_INTR_MASK; 613 ath10k_ahb_write32(ar, addr, val); 614 615 return 0; 616 } 617 618 static int ath10k_ahb_hif_start(struct ath10k *ar) 619 { 620 ath10k_dbg(ar, ATH10K_DBG_BOOT, "boot ahb hif start\n"); 621 622 ath10k_core_napi_enable(ar); 623 ath10k_ce_enable_interrupts(ar); 624 ath10k_pci_enable_legacy_irq(ar); 625 626 ath10k_pci_rx_post(ar); 627 628 return 0; 629 } 630 631 static void ath10k_ahb_hif_stop(struct ath10k *ar) 632 { 633 struct ath10k_ahb *ar_ahb = ath10k_ahb_priv(ar); 634 635 ath10k_dbg(ar, ATH10K_DBG_BOOT, "boot ahb hif stop\n"); 636 637 ath10k_ahb_irq_disable(ar); 638 synchronize_irq(ar_ahb->irq); 639 640 ath10k_core_napi_sync_disable(ar); 641 642 ath10k_pci_flush(ar); 643 } 644 645 static int ath10k_ahb_hif_power_up(struct ath10k *ar, 646 enum ath10k_firmware_mode fw_mode) 647 { 648 int ret; 649 650 ath10k_dbg(ar, ATH10K_DBG_BOOT, "boot ahb hif power up\n"); 651 652 ret = ath10k_ahb_chip_reset(ar); 653 if (ret) { 654 ath10k_err(ar, "failed to reset chip: %d\n", ret); 655 goto out; 656 } 657 658 ret = ath10k_pci_init_pipes(ar); 659 if (ret) { 660 ath10k_err(ar, "failed to initialize CE: %d\n", ret); 661 goto out; 662 } 663 664 ret = ath10k_pci_init_config(ar); 665 if (ret) { 666 ath10k_err(ar, "failed to setup init config: %d\n", ret); 667 goto err_ce_deinit; 668 } 669 670 ret = ath10k_ahb_wake_target_cpu(ar); 671 if (ret) { 672 ath10k_err(ar, "could not wake up target CPU: %d\n", ret); 673 goto err_ce_deinit; 674 } 675 676 return 0; 677 678 err_ce_deinit: 679 ath10k_pci_ce_deinit(ar); 680 out: 681 return ret; 682 } 683 684 static u32 ath10k_ahb_qca4019_targ_cpu_to_ce_addr(struct ath10k *ar, u32 addr) 685 { 686 u32 val = 0, region = addr & 0xfffff; 687 688 val = ath10k_pci_read32(ar, PCIE_BAR_REG_ADDRESS); 689 690 if (region >= QCA4019_SRAM_ADDR && region <= 691 (QCA4019_SRAM_ADDR + QCA4019_SRAM_LEN)) { 692 /* SRAM contents for QCA4019 can be directly accessed and 693 * no conversions are required 694 */ 695 val |= region; 696 } else { 697 val |= 0x100000 | region; 698 } 699 700 return val; 701 } 702 703 static const struct ath10k_hif_ops ath10k_ahb_hif_ops = { 704 .tx_sg = ath10k_pci_hif_tx_sg, 705 .diag_read = ath10k_pci_hif_diag_read, 706 .diag_write = ath10k_pci_diag_write_mem, 707 .exchange_bmi_msg = ath10k_pci_hif_exchange_bmi_msg, 708 .start = ath10k_ahb_hif_start, 709 .stop = ath10k_ahb_hif_stop, 710 .map_service_to_pipe = ath10k_pci_hif_map_service_to_pipe, 711 .get_default_pipe = ath10k_pci_hif_get_default_pipe, 712 .send_complete_check = ath10k_pci_hif_send_complete_check, 713 .get_free_queue_number = ath10k_pci_hif_get_free_queue_number, 714 .power_up = ath10k_ahb_hif_power_up, 715 .power_down = ath10k_pci_hif_power_down, 716 .read32 = ath10k_ahb_read32, 717 .write32 = ath10k_ahb_write32, 718 }; 719 720 static const struct ath10k_bus_ops ath10k_ahb_bus_ops = { 721 .read32 = ath10k_ahb_read32, 722 .write32 = ath10k_ahb_write32, 723 .get_num_banks = ath10k_ahb_get_num_banks, 724 }; 725 726 static int ath10k_ahb_probe(struct platform_device *pdev) 727 { 728 struct ath10k *ar; 729 struct ath10k_ahb *ar_ahb; 730 struct ath10k_pci *ar_pci; 731 const struct of_device_id *of_id; 732 enum ath10k_hw_rev hw_rev; 733 size_t size; 734 int ret; 735 struct ath10k_bus_params bus_params = {}; 736 737 of_id = of_match_device(ath10k_ahb_of_match, &pdev->dev); 738 if (!of_id) { 739 dev_err(&pdev->dev, "failed to find matching device tree id\n"); 740 return -EINVAL; 741 } 742 743 hw_rev = (enum ath10k_hw_rev)of_id->data; 744 745 size = sizeof(*ar_pci) + sizeof(*ar_ahb); 746 ar = ath10k_core_create(size, &pdev->dev, ATH10K_BUS_AHB, 747 hw_rev, &ath10k_ahb_hif_ops); 748 if (!ar) { 749 dev_err(&pdev->dev, "failed to allocate core\n"); 750 return -ENOMEM; 751 } 752 753 ath10k_dbg(ar, ATH10K_DBG_BOOT, "ahb probe\n"); 754 755 ar_pci = ath10k_pci_priv(ar); 756 ar_ahb = ath10k_ahb_priv(ar); 757 758 ar_ahb->pdev = pdev; 759 platform_set_drvdata(pdev, ar); 760 761 ret = ath10k_ahb_resource_init(ar); 762 if (ret) 763 goto err_core_destroy; 764 765 ar->dev_id = 0; 766 ar_pci->mem = ar_ahb->mem; 767 ar_pci->mem_len = ar_ahb->mem_len; 768 ar_pci->ar = ar; 769 ar_pci->ce.bus_ops = &ath10k_ahb_bus_ops; 770 ar_pci->targ_cpu_to_ce_addr = ath10k_ahb_qca4019_targ_cpu_to_ce_addr; 771 ar->ce_priv = &ar_pci->ce; 772 773 ret = ath10k_pci_setup_resource(ar); 774 if (ret) { 775 ath10k_err(ar, "failed to setup resource: %d\n", ret); 776 goto err_resource_deinit; 777 } 778 779 ath10k_pci_init_napi(ar); 780 781 ret = ath10k_ahb_request_irq_legacy(ar); 782 if (ret) 783 goto err_free_pipes; 784 785 ret = ath10k_ahb_prepare_device(ar); 786 if (ret) 787 goto err_free_irq; 788 789 ath10k_pci_ce_deinit(ar); 790 791 bus_params.dev_type = ATH10K_DEV_TYPE_LL; 792 bus_params.chip_id = ath10k_ahb_soc_read32(ar, SOC_CHIP_ID_ADDRESS); 793 if (bus_params.chip_id == 0xffffffff) { 794 ath10k_err(ar, "failed to get chip id\n"); 795 ret = -ENODEV; 796 goto err_halt_device; 797 } 798 799 ret = ath10k_core_register(ar, &bus_params); 800 if (ret) { 801 ath10k_err(ar, "failed to register driver core: %d\n", ret); 802 goto err_halt_device; 803 } 804 805 return 0; 806 807 err_halt_device: 808 ath10k_ahb_halt_chip(ar); 809 ath10k_ahb_clock_disable(ar); 810 811 err_free_irq: 812 ath10k_ahb_release_irq_legacy(ar); 813 814 err_free_pipes: 815 ath10k_pci_release_resource(ar); 816 817 err_resource_deinit: 818 ath10k_ahb_resource_deinit(ar); 819 820 err_core_destroy: 821 ath10k_core_destroy(ar); 822 platform_set_drvdata(pdev, NULL); 823 824 return ret; 825 } 826 827 static int ath10k_ahb_remove(struct platform_device *pdev) 828 { 829 struct ath10k *ar = platform_get_drvdata(pdev); 830 struct ath10k_ahb *ar_ahb; 831 832 if (!ar) 833 return -EINVAL; 834 835 ar_ahb = ath10k_ahb_priv(ar); 836 837 if (!ar_ahb) 838 return -EINVAL; 839 840 ath10k_dbg(ar, ATH10K_DBG_AHB, "ahb remove\n"); 841 842 ath10k_core_unregister(ar); 843 ath10k_ahb_irq_disable(ar); 844 ath10k_ahb_release_irq_legacy(ar); 845 ath10k_pci_release_resource(ar); 846 ath10k_ahb_halt_chip(ar); 847 ath10k_ahb_clock_disable(ar); 848 ath10k_ahb_resource_deinit(ar); 849 ath10k_core_destroy(ar); 850 851 platform_set_drvdata(pdev, NULL); 852 853 return 0; 854 } 855 856 static struct platform_driver ath10k_ahb_driver = { 857 .driver = { 858 .name = "ath10k_ahb", 859 .of_match_table = ath10k_ahb_of_match, 860 }, 861 .probe = ath10k_ahb_probe, 862 .remove = ath10k_ahb_remove, 863 }; 864 865 int ath10k_ahb_init(void) 866 { 867 int ret; 868 869 ret = platform_driver_register(&ath10k_ahb_driver); 870 if (ret) 871 printk(KERN_ERR "failed to register ath10k ahb driver: %d\n", 872 ret); 873 return ret; 874 } 875 876 void ath10k_ahb_exit(void) 877 { 878 platform_driver_unregister(&ath10k_ahb_driver); 879 } 880