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 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 446 if (!res) { 447 ath10k_err(ar, "failed to get memory resource\n"); 448 ret = -ENXIO; 449 goto out; 450 } 451 452 ar_ahb->mem = devm_ioremap_resource(&pdev->dev, res); 453 if (IS_ERR(ar_ahb->mem)) { 454 ath10k_err(ar, "mem ioremap error\n"); 455 ret = PTR_ERR(ar_ahb->mem); 456 goto out; 457 } 458 459 ar_ahb->mem_len = resource_size(res); 460 461 ar_ahb->gcc_mem = ioremap_nocache(ATH10K_GCC_REG_BASE, 462 ATH10K_GCC_REG_SIZE); 463 if (!ar_ahb->gcc_mem) { 464 ath10k_err(ar, "gcc mem ioremap error\n"); 465 ret = -ENOMEM; 466 goto err_mem_unmap; 467 } 468 469 ar_ahb->tcsr_mem = ioremap_nocache(ATH10K_TCSR_REG_BASE, 470 ATH10K_TCSR_REG_SIZE); 471 if (!ar_ahb->tcsr_mem) { 472 ath10k_err(ar, "tcsr mem ioremap error\n"); 473 ret = -ENOMEM; 474 goto err_gcc_mem_unmap; 475 } 476 477 ret = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32)); 478 if (ret) { 479 ath10k_err(ar, "failed to set 32-bit dma mask: %d\n", ret); 480 goto err_tcsr_mem_unmap; 481 } 482 483 ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32)); 484 if (ret) { 485 ath10k_err(ar, "failed to set 32-bit consistent dma: %d\n", 486 ret); 487 goto err_tcsr_mem_unmap; 488 } 489 490 ret = ath10k_ahb_clock_init(ar); 491 if (ret) 492 goto err_tcsr_mem_unmap; 493 494 ret = ath10k_ahb_rst_ctrl_init(ar); 495 if (ret) 496 goto err_clock_deinit; 497 498 ar_ahb->irq = platform_get_irq_byname(pdev, "legacy"); 499 if (ar_ahb->irq < 0) { 500 ath10k_err(ar, "failed to get irq number: %d\n", ar_ahb->irq); 501 ret = ar_ahb->irq; 502 goto err_clock_deinit; 503 } 504 505 ath10k_dbg(ar, ATH10K_DBG_BOOT, "irq: %d\n", ar_ahb->irq); 506 507 ath10k_dbg(ar, ATH10K_DBG_BOOT, "mem: 0x%pK mem_len: %lu gcc mem: 0x%pK tcsr_mem: 0x%pK\n", 508 ar_ahb->mem, ar_ahb->mem_len, 509 ar_ahb->gcc_mem, ar_ahb->tcsr_mem); 510 return 0; 511 512 err_clock_deinit: 513 ath10k_ahb_clock_deinit(ar); 514 515 err_tcsr_mem_unmap: 516 iounmap(ar_ahb->tcsr_mem); 517 518 err_gcc_mem_unmap: 519 ar_ahb->tcsr_mem = NULL; 520 iounmap(ar_ahb->gcc_mem); 521 522 err_mem_unmap: 523 ar_ahb->gcc_mem = NULL; 524 devm_iounmap(&pdev->dev, ar_ahb->mem); 525 526 out: 527 ar_ahb->mem = NULL; 528 return ret; 529 } 530 531 static void ath10k_ahb_resource_deinit(struct ath10k *ar) 532 { 533 struct ath10k_ahb *ar_ahb = ath10k_ahb_priv(ar); 534 struct device *dev; 535 536 dev = &ar_ahb->pdev->dev; 537 538 if (ar_ahb->mem) 539 devm_iounmap(dev, ar_ahb->mem); 540 541 if (ar_ahb->gcc_mem) 542 iounmap(ar_ahb->gcc_mem); 543 544 if (ar_ahb->tcsr_mem) 545 iounmap(ar_ahb->tcsr_mem); 546 547 ar_ahb->mem = NULL; 548 ar_ahb->gcc_mem = NULL; 549 ar_ahb->tcsr_mem = NULL; 550 551 ath10k_ahb_clock_deinit(ar); 552 ath10k_ahb_rst_ctrl_deinit(ar); 553 } 554 555 static int ath10k_ahb_prepare_device(struct ath10k *ar) 556 { 557 u32 val; 558 int ret; 559 560 ret = ath10k_ahb_clock_enable(ar); 561 if (ret) { 562 ath10k_err(ar, "failed to enable clocks\n"); 563 return ret; 564 } 565 566 /* Clock for the target is supplied from outside of target (ie, 567 * external clock module controlled by the host). Target needs 568 * to know what frequency target cpu is configured which is needed 569 * for target internal use. Read target cpu frequency info from 570 * gcc register and write into target's scratch register where 571 * target expects this information. 572 */ 573 val = ath10k_ahb_gcc_read32(ar, ATH10K_AHB_GCC_FEPLL_PLL_DIV); 574 ath10k_ahb_write32(ar, ATH10K_AHB_WIFI_SCRATCH_5_REG, val); 575 576 ret = ath10k_ahb_release_reset(ar); 577 if (ret) 578 goto err_clk_disable; 579 580 ath10k_ahb_irq_disable(ar); 581 582 ath10k_ahb_write32(ar, FW_INDICATOR_ADDRESS, FW_IND_HOST_READY); 583 584 ret = ath10k_pci_wait_for_target_init(ar); 585 if (ret) 586 goto err_halt_chip; 587 588 return 0; 589 590 err_halt_chip: 591 ath10k_ahb_halt_chip(ar); 592 593 err_clk_disable: 594 ath10k_ahb_clock_disable(ar); 595 596 return ret; 597 } 598 599 static int ath10k_ahb_chip_reset(struct ath10k *ar) 600 { 601 int ret; 602 603 ath10k_ahb_halt_chip(ar); 604 ath10k_ahb_clock_disable(ar); 605 606 ret = ath10k_ahb_prepare_device(ar); 607 if (ret) 608 return ret; 609 610 return 0; 611 } 612 613 static int ath10k_ahb_wake_target_cpu(struct ath10k *ar) 614 { 615 u32 addr, val; 616 617 addr = SOC_CORE_BASE_ADDRESS | CORE_CTRL_ADDRESS; 618 val = ath10k_ahb_read32(ar, addr); 619 val |= ATH10K_AHB_CORE_CTRL_CPU_INTR_MASK; 620 ath10k_ahb_write32(ar, addr, val); 621 622 return 0; 623 } 624 625 static int ath10k_ahb_hif_start(struct ath10k *ar) 626 { 627 ath10k_dbg(ar, ATH10K_DBG_BOOT, "boot ahb hif start\n"); 628 629 napi_enable(&ar->napi); 630 ath10k_ce_enable_interrupts(ar); 631 ath10k_pci_enable_legacy_irq(ar); 632 633 ath10k_pci_rx_post(ar); 634 635 return 0; 636 } 637 638 static void ath10k_ahb_hif_stop(struct ath10k *ar) 639 { 640 struct ath10k_ahb *ar_ahb = ath10k_ahb_priv(ar); 641 642 ath10k_dbg(ar, ATH10K_DBG_BOOT, "boot ahb hif stop\n"); 643 644 ath10k_ahb_irq_disable(ar); 645 synchronize_irq(ar_ahb->irq); 646 647 napi_synchronize(&ar->napi); 648 napi_disable(&ar->napi); 649 650 ath10k_pci_flush(ar); 651 } 652 653 static int ath10k_ahb_hif_power_up(struct ath10k *ar, 654 enum ath10k_firmware_mode fw_mode) 655 { 656 int ret; 657 658 ath10k_dbg(ar, ATH10K_DBG_BOOT, "boot ahb hif power up\n"); 659 660 ret = ath10k_ahb_chip_reset(ar); 661 if (ret) { 662 ath10k_err(ar, "failed to reset chip: %d\n", ret); 663 goto out; 664 } 665 666 ret = ath10k_pci_init_pipes(ar); 667 if (ret) { 668 ath10k_err(ar, "failed to initialize CE: %d\n", ret); 669 goto out; 670 } 671 672 ret = ath10k_pci_init_config(ar); 673 if (ret) { 674 ath10k_err(ar, "failed to setup init config: %d\n", ret); 675 goto err_ce_deinit; 676 } 677 678 ret = ath10k_ahb_wake_target_cpu(ar); 679 if (ret) { 680 ath10k_err(ar, "could not wake up target CPU: %d\n", ret); 681 goto err_ce_deinit; 682 } 683 684 return 0; 685 686 err_ce_deinit: 687 ath10k_pci_ce_deinit(ar); 688 out: 689 return ret; 690 } 691 692 static u32 ath10k_ahb_qca4019_targ_cpu_to_ce_addr(struct ath10k *ar, u32 addr) 693 { 694 u32 val = 0, region = addr & 0xfffff; 695 696 val = ath10k_pci_read32(ar, PCIE_BAR_REG_ADDRESS); 697 698 if (region >= QCA4019_SRAM_ADDR && region <= 699 (QCA4019_SRAM_ADDR + QCA4019_SRAM_LEN)) { 700 /* SRAM contents for QCA4019 can be directly accessed and 701 * no conversions are required 702 */ 703 val |= region; 704 } else { 705 val |= 0x100000 | region; 706 } 707 708 return val; 709 } 710 711 static const struct ath10k_hif_ops ath10k_ahb_hif_ops = { 712 .tx_sg = ath10k_pci_hif_tx_sg, 713 .diag_read = ath10k_pci_hif_diag_read, 714 .diag_write = ath10k_pci_diag_write_mem, 715 .exchange_bmi_msg = ath10k_pci_hif_exchange_bmi_msg, 716 .start = ath10k_ahb_hif_start, 717 .stop = ath10k_ahb_hif_stop, 718 .map_service_to_pipe = ath10k_pci_hif_map_service_to_pipe, 719 .get_default_pipe = ath10k_pci_hif_get_default_pipe, 720 .send_complete_check = ath10k_pci_hif_send_complete_check, 721 .get_free_queue_number = ath10k_pci_hif_get_free_queue_number, 722 .power_up = ath10k_ahb_hif_power_up, 723 .power_down = ath10k_pci_hif_power_down, 724 .read32 = ath10k_ahb_read32, 725 .write32 = ath10k_ahb_write32, 726 }; 727 728 static const struct ath10k_bus_ops ath10k_ahb_bus_ops = { 729 .read32 = ath10k_ahb_read32, 730 .write32 = ath10k_ahb_write32, 731 .get_num_banks = ath10k_ahb_get_num_banks, 732 }; 733 734 static int ath10k_ahb_probe(struct platform_device *pdev) 735 { 736 struct ath10k *ar; 737 struct ath10k_ahb *ar_ahb; 738 struct ath10k_pci *ar_pci; 739 const struct of_device_id *of_id; 740 enum ath10k_hw_rev hw_rev; 741 size_t size; 742 int ret; 743 struct ath10k_bus_params bus_params = {}; 744 745 of_id = of_match_device(ath10k_ahb_of_match, &pdev->dev); 746 if (!of_id) { 747 dev_err(&pdev->dev, "failed to find matching device tree id\n"); 748 return -EINVAL; 749 } 750 751 hw_rev = (enum ath10k_hw_rev)of_id->data; 752 753 size = sizeof(*ar_pci) + sizeof(*ar_ahb); 754 ar = ath10k_core_create(size, &pdev->dev, ATH10K_BUS_AHB, 755 hw_rev, &ath10k_ahb_hif_ops); 756 if (!ar) { 757 dev_err(&pdev->dev, "failed to allocate core\n"); 758 return -ENOMEM; 759 } 760 761 ath10k_dbg(ar, ATH10K_DBG_BOOT, "ahb probe\n"); 762 763 ar_pci = ath10k_pci_priv(ar); 764 ar_ahb = ath10k_ahb_priv(ar); 765 766 ar_ahb->pdev = pdev; 767 platform_set_drvdata(pdev, ar); 768 769 ret = ath10k_ahb_resource_init(ar); 770 if (ret) 771 goto err_core_destroy; 772 773 ar->dev_id = 0; 774 ar_pci->mem = ar_ahb->mem; 775 ar_pci->mem_len = ar_ahb->mem_len; 776 ar_pci->ar = ar; 777 ar_pci->ce.bus_ops = &ath10k_ahb_bus_ops; 778 ar_pci->targ_cpu_to_ce_addr = ath10k_ahb_qca4019_targ_cpu_to_ce_addr; 779 ar->ce_priv = &ar_pci->ce; 780 781 ret = ath10k_pci_setup_resource(ar); 782 if (ret) { 783 ath10k_err(ar, "failed to setup resource: %d\n", ret); 784 goto err_resource_deinit; 785 } 786 787 ath10k_pci_init_napi(ar); 788 789 ret = ath10k_ahb_request_irq_legacy(ar); 790 if (ret) 791 goto err_free_pipes; 792 793 ret = ath10k_ahb_prepare_device(ar); 794 if (ret) 795 goto err_free_irq; 796 797 ath10k_pci_ce_deinit(ar); 798 799 bus_params.dev_type = ATH10K_DEV_TYPE_LL; 800 bus_params.chip_id = ath10k_ahb_soc_read32(ar, SOC_CHIP_ID_ADDRESS); 801 if (bus_params.chip_id == 0xffffffff) { 802 ath10k_err(ar, "failed to get chip id\n"); 803 ret = -ENODEV; 804 goto err_halt_device; 805 } 806 807 ret = ath10k_core_register(ar, &bus_params); 808 if (ret) { 809 ath10k_err(ar, "failed to register driver core: %d\n", ret); 810 goto err_halt_device; 811 } 812 813 return 0; 814 815 err_halt_device: 816 ath10k_ahb_halt_chip(ar); 817 ath10k_ahb_clock_disable(ar); 818 819 err_free_irq: 820 ath10k_ahb_release_irq_legacy(ar); 821 822 err_free_pipes: 823 ath10k_pci_free_pipes(ar); 824 825 err_resource_deinit: 826 ath10k_ahb_resource_deinit(ar); 827 828 err_core_destroy: 829 ath10k_core_destroy(ar); 830 platform_set_drvdata(pdev, NULL); 831 832 return ret; 833 } 834 835 static int ath10k_ahb_remove(struct platform_device *pdev) 836 { 837 struct ath10k *ar = platform_get_drvdata(pdev); 838 struct ath10k_ahb *ar_ahb; 839 840 if (!ar) 841 return -EINVAL; 842 843 ar_ahb = ath10k_ahb_priv(ar); 844 845 if (!ar_ahb) 846 return -EINVAL; 847 848 ath10k_dbg(ar, ATH10K_DBG_AHB, "ahb remove\n"); 849 850 ath10k_core_unregister(ar); 851 ath10k_ahb_irq_disable(ar); 852 ath10k_ahb_release_irq_legacy(ar); 853 ath10k_pci_release_resource(ar); 854 ath10k_ahb_halt_chip(ar); 855 ath10k_ahb_clock_disable(ar); 856 ath10k_ahb_resource_deinit(ar); 857 ath10k_core_destroy(ar); 858 859 platform_set_drvdata(pdev, NULL); 860 861 return 0; 862 } 863 864 static struct platform_driver ath10k_ahb_driver = { 865 .driver = { 866 .name = "ath10k_ahb", 867 .of_match_table = ath10k_ahb_of_match, 868 }, 869 .probe = ath10k_ahb_probe, 870 .remove = ath10k_ahb_remove, 871 }; 872 873 int ath10k_ahb_init(void) 874 { 875 int ret; 876 877 ret = platform_driver_register(&ath10k_ahb_driver); 878 if (ret) 879 printk(KERN_ERR "failed to register ath10k ahb driver: %d\n", 880 ret); 881 return ret; 882 } 883 884 void ath10k_ahb_exit(void) 885 { 886 platform_driver_unregister(&ath10k_ahb_driver); 887 } 888