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1// SPDX-License-Identifier: BSD-3-Clause-Clear
2/*
3 * Copyright (c) 2019-2020 The Linux Foundation. All rights reserved.
4 * Copyright (c) 2021-2023 Qualcomm Innovation Center, Inc. All rights reserved.
5 */
6
7#include <linux/module.h>
8#include <linux/msi.h>
9#include <linux/pci.h>
10#include <linux/of.h>
11
12#include "pci.h"
13#include "core.h"
14#include "hif.h"
15#include "mhi.h"
16#include "debug.h"
17#include "pcic.h"
18#include "qmi.h"
19
20#define ATH11K_PCI_BAR_NUM 0
21#define ATH11K_PCI_DMA_MASK 32
22
23#define TCSR_SOC_HW_VERSION 0x0224
24#define TCSR_SOC_HW_VERSION_MAJOR_MASK GENMASK(11, 8)
25#define TCSR_SOC_HW_VERSION_MINOR_MASK GENMASK(7, 0)
26
27#define QCA6390_DEVICE_ID 0x1101
28#define QCN9074_DEVICE_ID 0x1104
29#define WCN6855_DEVICE_ID 0x1103
30
31static const struct pci_device_id ath11k_pci_id_table[] = {
32 { PCI_VDEVICE(QCOM, QCA6390_DEVICE_ID) },
33 { PCI_VDEVICE(QCOM, WCN6855_DEVICE_ID) },
34 { PCI_VDEVICE(QCOM, QCN9074_DEVICE_ID) },
35 {0}
36};
37
38MODULE_DEVICE_TABLE(pci, ath11k_pci_id_table);
39
40static int ath11k_pci_bus_wake_up(struct ath11k_base *ab)
41{
42 struct ath11k_pci *ab_pci = ath11k_pci_priv(ab);
43
44 return mhi_device_get_sync(ab_pci->mhi_ctrl->mhi_dev);
45}
46
47static void ath11k_pci_bus_release(struct ath11k_base *ab)
48{
49 struct ath11k_pci *ab_pci = ath11k_pci_priv(ab);
50
51 mhi_device_put(ab_pci->mhi_ctrl->mhi_dev);
52}
53
54static u32 ath11k_pci_get_window_start(struct ath11k_base *ab, u32 offset)
55{
56 if (!ab->hw_params.static_window_map)
57 return ATH11K_PCI_WINDOW_START;
58
59 if ((offset ^ HAL_SEQ_WCSS_UMAC_OFFSET) < ATH11K_PCI_WINDOW_RANGE_MASK)
60 /* if offset lies within DP register range, use 3rd window */
61 return 3 * ATH11K_PCI_WINDOW_START;
62 else if ((offset ^ HAL_SEQ_WCSS_UMAC_CE0_SRC_REG(ab)) <
63 ATH11K_PCI_WINDOW_RANGE_MASK)
64 /* if offset lies within CE register range, use 2nd window */
65 return 2 * ATH11K_PCI_WINDOW_START;
66 else
67 return ATH11K_PCI_WINDOW_START;
68}
69
70static inline void ath11k_pci_select_window(struct ath11k_pci *ab_pci, u32 offset)
71{
72 struct ath11k_base *ab = ab_pci->ab;
73
74 u32 window = FIELD_GET(ATH11K_PCI_WINDOW_VALUE_MASK, offset);
75
76 lockdep_assert_held(&ab_pci->window_lock);
77
78 if (window != ab_pci->register_window) {
79 iowrite32(ATH11K_PCI_WINDOW_ENABLE_BIT | window,
80 ab->mem + ATH11K_PCI_WINDOW_REG_ADDRESS);
81 ioread32(ab->mem + ATH11K_PCI_WINDOW_REG_ADDRESS);
82 ab_pci->register_window = window;
83 }
84}
85
86static void
87ath11k_pci_window_write32(struct ath11k_base *ab, u32 offset, u32 value)
88{
89 struct ath11k_pci *ab_pci = ath11k_pci_priv(ab);
90 u32 window_start;
91
92 window_start = ath11k_pci_get_window_start(ab, offset);
93
94 if (window_start == ATH11K_PCI_WINDOW_START) {
95 spin_lock_bh(&ab_pci->window_lock);
96 ath11k_pci_select_window(ab_pci, offset);
97 iowrite32(value, ab->mem + window_start +
98 (offset & ATH11K_PCI_WINDOW_RANGE_MASK));
99 spin_unlock_bh(&ab_pci->window_lock);
100 } else {
101 iowrite32(value, ab->mem + window_start +
102 (offset & ATH11K_PCI_WINDOW_RANGE_MASK));
103 }
104}
105
106static u32 ath11k_pci_window_read32(struct ath11k_base *ab, u32 offset)
107{
108 struct ath11k_pci *ab_pci = ath11k_pci_priv(ab);
109 u32 window_start, val;
110
111 window_start = ath11k_pci_get_window_start(ab, offset);
112
113 if (window_start == ATH11K_PCI_WINDOW_START) {
114 spin_lock_bh(&ab_pci->window_lock);
115 ath11k_pci_select_window(ab_pci, offset);
116 val = ioread32(ab->mem + window_start +
117 (offset & ATH11K_PCI_WINDOW_RANGE_MASK));
118 spin_unlock_bh(&ab_pci->window_lock);
119 } else {
120 val = ioread32(ab->mem + window_start +
121 (offset & ATH11K_PCI_WINDOW_RANGE_MASK));
122 }
123
124 return val;
125}
126
127int ath11k_pci_get_msi_irq(struct ath11k_base *ab, unsigned int vector)
128{
129 struct pci_dev *pci_dev = to_pci_dev(ab->dev);
130
131 return pci_irq_vector(pci_dev, vector);
132}
133
134static const struct ath11k_pci_ops ath11k_pci_ops_qca6390 = {
135 .wakeup = ath11k_pci_bus_wake_up,
136 .release = ath11k_pci_bus_release,
137 .get_msi_irq = ath11k_pci_get_msi_irq,
138 .window_write32 = ath11k_pci_window_write32,
139 .window_read32 = ath11k_pci_window_read32,
140};
141
142static const struct ath11k_pci_ops ath11k_pci_ops_qcn9074 = {
143 .wakeup = NULL,
144 .release = NULL,
145 .get_msi_irq = ath11k_pci_get_msi_irq,
146 .window_write32 = ath11k_pci_window_write32,
147 .window_read32 = ath11k_pci_window_read32,
148};
149
150static const struct ath11k_msi_config msi_config_one_msi = {
151 .total_vectors = 1,
152 .total_users = 4,
153 .users = (struct ath11k_msi_user[]) {
154 { .name = "MHI", .num_vectors = 3, .base_vector = 0 },
155 { .name = "CE", .num_vectors = 1, .base_vector = 0 },
156 { .name = "WAKE", .num_vectors = 1, .base_vector = 0 },
157 { .name = "DP", .num_vectors = 1, .base_vector = 0 },
158 },
159};
160
161static inline void ath11k_pci_select_static_window(struct ath11k_pci *ab_pci)
162{
163 u32 umac_window;
164 u32 ce_window;
165 u32 window;
166
167 umac_window = FIELD_GET(ATH11K_PCI_WINDOW_VALUE_MASK, HAL_SEQ_WCSS_UMAC_OFFSET);
168 ce_window = FIELD_GET(ATH11K_PCI_WINDOW_VALUE_MASK, HAL_CE_WFSS_CE_REG_BASE);
169 window = (umac_window << 12) | (ce_window << 6);
170
171 iowrite32(ATH11K_PCI_WINDOW_ENABLE_BIT | window,
172 ab_pci->ab->mem + ATH11K_PCI_WINDOW_REG_ADDRESS);
173}
174
175static void ath11k_pci_soc_global_reset(struct ath11k_base *ab)
176{
177 u32 val, delay;
178
179 val = ath11k_pcic_read32(ab, PCIE_SOC_GLOBAL_RESET);
180
181 val |= PCIE_SOC_GLOBAL_RESET_V;
182
183 ath11k_pcic_write32(ab, PCIE_SOC_GLOBAL_RESET, val);
184
185 /* TODO: exact time to sleep is uncertain */
186 delay = 10;
187 mdelay(delay);
188
189 /* Need to toggle V bit back otherwise stuck in reset status */
190 val &= ~PCIE_SOC_GLOBAL_RESET_V;
191
192 ath11k_pcic_write32(ab, PCIE_SOC_GLOBAL_RESET, val);
193
194 mdelay(delay);
195
196 val = ath11k_pcic_read32(ab, PCIE_SOC_GLOBAL_RESET);
197 if (val == 0xffffffff)
198 ath11k_warn(ab, "link down error during global reset\n");
199}
200
201static void ath11k_pci_clear_dbg_registers(struct ath11k_base *ab)
202{
203 u32 val;
204
205 /* read cookie */
206 val = ath11k_pcic_read32(ab, PCIE_Q6_COOKIE_ADDR);
207 ath11k_dbg(ab, ATH11K_DBG_PCI, "pcie_q6_cookie_addr 0x%x\n", val);
208
209 val = ath11k_pcic_read32(ab, WLAON_WARM_SW_ENTRY);
210 ath11k_dbg(ab, ATH11K_DBG_PCI, "wlaon_warm_sw_entry 0x%x\n", val);
211
212 /* TODO: exact time to sleep is uncertain */
213 mdelay(10);
214
215 /* write 0 to WLAON_WARM_SW_ENTRY to prevent Q6 from
216 * continuing warm path and entering dead loop.
217 */
218 ath11k_pcic_write32(ab, WLAON_WARM_SW_ENTRY, 0);
219 mdelay(10);
220
221 val = ath11k_pcic_read32(ab, WLAON_WARM_SW_ENTRY);
222 ath11k_dbg(ab, ATH11K_DBG_PCI, "wlaon_warm_sw_entry 0x%x\n", val);
223
224 /* A read clear register. clear the register to prevent
225 * Q6 from entering wrong code path.
226 */
227 val = ath11k_pcic_read32(ab, WLAON_SOC_RESET_CAUSE_REG);
228 ath11k_dbg(ab, ATH11K_DBG_PCI, "soc reset cause %d\n", val);
229}
230
231static int ath11k_pci_set_link_reg(struct ath11k_base *ab,
232 u32 offset, u32 value, u32 mask)
233{
234 u32 v;
235 int i;
236
237 v = ath11k_pcic_read32(ab, offset);
238 if ((v & mask) == value)
239 return 0;
240
241 for (i = 0; i < 10; i++) {
242 ath11k_pcic_write32(ab, offset, (v & ~mask) | value);
243
244 v = ath11k_pcic_read32(ab, offset);
245 if ((v & mask) == value)
246 return 0;
247
248 mdelay(2);
249 }
250
251 ath11k_warn(ab, "failed to set pcie link register 0x%08x: 0x%08x != 0x%08x\n",
252 offset, v & mask, value);
253
254 return -ETIMEDOUT;
255}
256
257static int ath11k_pci_fix_l1ss(struct ath11k_base *ab)
258{
259 int ret;
260
261 ret = ath11k_pci_set_link_reg(ab,
262 PCIE_QSERDES_COM_SYSCLK_EN_SEL_REG(ab),
263 PCIE_QSERDES_COM_SYSCLK_EN_SEL_VAL,
264 PCIE_QSERDES_COM_SYSCLK_EN_SEL_MSK);
265 if (ret) {
266 ath11k_warn(ab, "failed to set sysclk: %d\n", ret);
267 return ret;
268 }
269
270 ret = ath11k_pci_set_link_reg(ab,
271 PCIE_PCS_OSC_DTCT_CONFIG1_REG(ab),
272 PCIE_PCS_OSC_DTCT_CONFIG1_VAL,
273 PCIE_PCS_OSC_DTCT_CONFIG_MSK);
274 if (ret) {
275 ath11k_warn(ab, "failed to set dtct config1 error: %d\n", ret);
276 return ret;
277 }
278
279 ret = ath11k_pci_set_link_reg(ab,
280 PCIE_PCS_OSC_DTCT_CONFIG2_REG(ab),
281 PCIE_PCS_OSC_DTCT_CONFIG2_VAL,
282 PCIE_PCS_OSC_DTCT_CONFIG_MSK);
283 if (ret) {
284 ath11k_warn(ab, "failed to set dtct config2: %d\n", ret);
285 return ret;
286 }
287
288 ret = ath11k_pci_set_link_reg(ab,
289 PCIE_PCS_OSC_DTCT_CONFIG4_REG(ab),
290 PCIE_PCS_OSC_DTCT_CONFIG4_VAL,
291 PCIE_PCS_OSC_DTCT_CONFIG_MSK);
292 if (ret) {
293 ath11k_warn(ab, "failed to set dtct config4: %d\n", ret);
294 return ret;
295 }
296
297 return 0;
298}
299
300static void ath11k_pci_enable_ltssm(struct ath11k_base *ab)
301{
302 u32 val;
303 int i;
304
305 val = ath11k_pcic_read32(ab, PCIE_PCIE_PARF_LTSSM);
306
307 /* PCIE link seems very unstable after the Hot Reset*/
308 for (i = 0; val != PARM_LTSSM_VALUE && i < 5; i++) {
309 if (val == 0xffffffff)
310 mdelay(5);
311
312 ath11k_pcic_write32(ab, PCIE_PCIE_PARF_LTSSM, PARM_LTSSM_VALUE);
313 val = ath11k_pcic_read32(ab, PCIE_PCIE_PARF_LTSSM);
314 }
315
316 ath11k_dbg(ab, ATH11K_DBG_PCI, "ltssm 0x%x\n", val);
317
318 val = ath11k_pcic_read32(ab, GCC_GCC_PCIE_HOT_RST);
319 val |= GCC_GCC_PCIE_HOT_RST_VAL;
320 ath11k_pcic_write32(ab, GCC_GCC_PCIE_HOT_RST, val);
321 val = ath11k_pcic_read32(ab, GCC_GCC_PCIE_HOT_RST);
322
323 ath11k_dbg(ab, ATH11K_DBG_PCI, "pcie_hot_rst 0x%x\n", val);
324
325 mdelay(5);
326}
327
328static void ath11k_pci_clear_all_intrs(struct ath11k_base *ab)
329{
330 /* This is a WAR for PCIE Hotreset.
331 * When target receive Hotreset, but will set the interrupt.
332 * So when download SBL again, SBL will open Interrupt and
333 * receive it, and crash immediately.
334 */
335 ath11k_pcic_write32(ab, PCIE_PCIE_INT_ALL_CLEAR, PCIE_INT_CLEAR_ALL);
336}
337
338static void ath11k_pci_set_wlaon_pwr_ctrl(struct ath11k_base *ab)
339{
340 u32 val;
341
342 val = ath11k_pcic_read32(ab, WLAON_QFPROM_PWR_CTRL_REG);
343 val &= ~QFPROM_PWR_CTRL_VDD4BLOW_MASK;
344 ath11k_pcic_write32(ab, WLAON_QFPROM_PWR_CTRL_REG, val);
345}
346
347static void ath11k_pci_force_wake(struct ath11k_base *ab)
348{
349 ath11k_pcic_write32(ab, PCIE_SOC_WAKE_PCIE_LOCAL_REG, 1);
350 mdelay(5);
351}
352
353static void ath11k_pci_sw_reset(struct ath11k_base *ab, bool power_on)
354{
355 mdelay(100);
356
357 if (power_on) {
358 ath11k_pci_enable_ltssm(ab);
359 ath11k_pci_clear_all_intrs(ab);
360 ath11k_pci_set_wlaon_pwr_ctrl(ab);
361 if (ab->hw_params.fix_l1ss)
362 ath11k_pci_fix_l1ss(ab);
363 }
364
365 ath11k_mhi_clear_vector(ab);
366 ath11k_pci_clear_dbg_registers(ab);
367 ath11k_pci_soc_global_reset(ab);
368 ath11k_mhi_set_mhictrl_reset(ab);
369}
370
371static void ath11k_pci_init_qmi_ce_config(struct ath11k_base *ab)
372{
373 struct ath11k_qmi_ce_cfg *cfg = &ab->qmi.ce_cfg;
374
375 cfg->tgt_ce = ab->hw_params.target_ce_config;
376 cfg->tgt_ce_len = ab->hw_params.target_ce_count;
377
378 cfg->svc_to_ce_map = ab->hw_params.svc_to_ce_map;
379 cfg->svc_to_ce_map_len = ab->hw_params.svc_to_ce_map_len;
380 ab->qmi.service_ins_id = ab->hw_params.qmi_service_ins_id;
381
382 ath11k_ce_get_shadow_config(ab, &cfg->shadow_reg_v2,
383 &cfg->shadow_reg_v2_len);
384}
385
386static void ath11k_pci_msi_config(struct ath11k_pci *ab_pci, bool enable)
387{
388 struct pci_dev *dev = ab_pci->pdev;
389 u16 control;
390
391 pci_read_config_word(dev, dev->msi_cap + PCI_MSI_FLAGS, &control);
392
393 if (enable)
394 control |= PCI_MSI_FLAGS_ENABLE;
395 else
396 control &= ~PCI_MSI_FLAGS_ENABLE;
397
398 pci_write_config_word(dev, dev->msi_cap + PCI_MSI_FLAGS, control);
399}
400
401static void ath11k_pci_msi_enable(struct ath11k_pci *ab_pci)
402{
403 ath11k_pci_msi_config(ab_pci, true);
404}
405
406static void ath11k_pci_msi_disable(struct ath11k_pci *ab_pci)
407{
408 ath11k_pci_msi_config(ab_pci, false);
409}
410
411static int ath11k_pci_alloc_msi(struct ath11k_pci *ab_pci)
412{
413 struct ath11k_base *ab = ab_pci->ab;
414 const struct ath11k_msi_config *msi_config = ab->pci.msi.config;
415 struct pci_dev *pci_dev = ab_pci->pdev;
416 struct msi_desc *msi_desc;
417 int num_vectors;
418 int ret;
419
420 num_vectors = pci_alloc_irq_vectors(pci_dev,
421 msi_config->total_vectors,
422 msi_config->total_vectors,
423 PCI_IRQ_MSI);
424 if (num_vectors == msi_config->total_vectors) {
425 set_bit(ATH11K_FLAG_MULTI_MSI_VECTORS, &ab->dev_flags);
426 } else {
427 num_vectors = pci_alloc_irq_vectors(ab_pci->pdev,
428 1,
429 1,
430 PCI_IRQ_MSI);
431 if (num_vectors < 0) {
432 ret = -EINVAL;
433 goto reset_msi_config;
434 }
435 clear_bit(ATH11K_FLAG_MULTI_MSI_VECTORS, &ab->dev_flags);
436 ab->pci.msi.config = &msi_config_one_msi;
437 ath11k_dbg(ab, ATH11K_DBG_PCI, "request one msi vector\n");
438 }
439 ath11k_info(ab, "MSI vectors: %d\n", num_vectors);
440
441 ath11k_pci_msi_disable(ab_pci);
442
443 msi_desc = irq_get_msi_desc(ab_pci->pdev->irq);
444 if (!msi_desc) {
445 ath11k_err(ab, "msi_desc is NULL!\n");
446 ret = -EINVAL;
447 goto free_msi_vector;
448 }
449
450 ab->pci.msi.ep_base_data = msi_desc->msg.data;
451
452 pci_read_config_dword(pci_dev, pci_dev->msi_cap + PCI_MSI_ADDRESS_LO,
453 &ab->pci.msi.addr_lo);
454
455 if (msi_desc->pci.msi_attrib.is_64) {
456 pci_read_config_dword(pci_dev, pci_dev->msi_cap + PCI_MSI_ADDRESS_HI,
457 &ab->pci.msi.addr_hi);
458 } else {
459 ab->pci.msi.addr_hi = 0;
460 }
461
462 ath11k_dbg(ab, ATH11K_DBG_PCI, "msi base data is %d\n", ab->pci.msi.ep_base_data);
463
464 return 0;
465
466free_msi_vector:
467 pci_free_irq_vectors(ab_pci->pdev);
468
469reset_msi_config:
470 return ret;
471}
472
473static void ath11k_pci_free_msi(struct ath11k_pci *ab_pci)
474{
475 pci_free_irq_vectors(ab_pci->pdev);
476}
477
478static int ath11k_pci_config_msi_data(struct ath11k_pci *ab_pci)
479{
480 struct msi_desc *msi_desc;
481
482 msi_desc = irq_get_msi_desc(ab_pci->pdev->irq);
483 if (!msi_desc) {
484 ath11k_err(ab_pci->ab, "msi_desc is NULL!\n");
485 pci_free_irq_vectors(ab_pci->pdev);
486 return -EINVAL;
487 }
488
489 ab_pci->ab->pci.msi.ep_base_data = msi_desc->msg.data;
490
491 ath11k_dbg(ab_pci->ab, ATH11K_DBG_PCI, "after request_irq msi_ep_base_data %d\n",
492 ab_pci->ab->pci.msi.ep_base_data);
493
494 return 0;
495}
496
497static int ath11k_pci_claim(struct ath11k_pci *ab_pci, struct pci_dev *pdev)
498{
499 struct ath11k_base *ab = ab_pci->ab;
500 u16 device_id;
501 int ret = 0;
502
503 pci_read_config_word(pdev, PCI_DEVICE_ID, &device_id);
504 if (device_id != ab_pci->dev_id) {
505 ath11k_err(ab, "pci device id mismatch: 0x%x 0x%x\n",
506 device_id, ab_pci->dev_id);
507 ret = -EIO;
508 goto out;
509 }
510
511 ret = pci_assign_resource(pdev, ATH11K_PCI_BAR_NUM);
512 if (ret) {
513 ath11k_err(ab, "failed to assign pci resource: %d\n", ret);
514 goto out;
515 }
516
517 ret = pci_enable_device(pdev);
518 if (ret) {
519 ath11k_err(ab, "failed to enable pci device: %d\n", ret);
520 goto out;
521 }
522
523 ret = pci_request_region(pdev, ATH11K_PCI_BAR_NUM, "ath11k_pci");
524 if (ret) {
525 ath11k_err(ab, "failed to request pci region: %d\n", ret);
526 goto disable_device;
527 }
528
529 ret = dma_set_mask_and_coherent(&pdev->dev,
530 DMA_BIT_MASK(ATH11K_PCI_DMA_MASK));
531 if (ret) {
532 ath11k_err(ab, "failed to set pci dma mask to %d: %d\n",
533 ATH11K_PCI_DMA_MASK, ret);
534 goto release_region;
535 }
536
537 pci_set_master(pdev);
538
539 ab->mem_len = pci_resource_len(pdev, ATH11K_PCI_BAR_NUM);
540 ab->mem = pci_iomap(pdev, ATH11K_PCI_BAR_NUM, 0);
541 if (!ab->mem) {
542 ath11k_err(ab, "failed to map pci bar %d\n", ATH11K_PCI_BAR_NUM);
543 ret = -EIO;
544 goto release_region;
545 }
546
547 ab->mem_ce = ab->mem;
548
549 ath11k_dbg(ab, ATH11K_DBG_BOOT, "pci_mem 0x%p\n", ab->mem);
550 return 0;
551
552release_region:
553 pci_release_region(pdev, ATH11K_PCI_BAR_NUM);
554disable_device:
555 pci_disable_device(pdev);
556out:
557 return ret;
558}
559
560static void ath11k_pci_free_region(struct ath11k_pci *ab_pci)
561{
562 struct ath11k_base *ab = ab_pci->ab;
563 struct pci_dev *pci_dev = ab_pci->pdev;
564
565 pci_iounmap(pci_dev, ab->mem);
566 ab->mem = NULL;
567 pci_release_region(pci_dev, ATH11K_PCI_BAR_NUM);
568 if (pci_is_enabled(pci_dev))
569 pci_disable_device(pci_dev);
570}
571
572static void ath11k_pci_aspm_disable(struct ath11k_pci *ab_pci)
573{
574 struct ath11k_base *ab = ab_pci->ab;
575
576 pcie_capability_read_word(ab_pci->pdev, PCI_EXP_LNKCTL,
577 &ab_pci->link_ctl);
578
579 ath11k_dbg(ab, ATH11K_DBG_PCI, "link_ctl 0x%04x L0s %d L1 %d\n",
580 ab_pci->link_ctl,
581 u16_get_bits(ab_pci->link_ctl, PCI_EXP_LNKCTL_ASPM_L0S),
582 u16_get_bits(ab_pci->link_ctl, PCI_EXP_LNKCTL_ASPM_L1));
583
584 /* disable L0s and L1 */
585 pcie_capability_clear_word(ab_pci->pdev, PCI_EXP_LNKCTL,
586 PCI_EXP_LNKCTL_ASPMC);
587
588 set_bit(ATH11K_PCI_ASPM_RESTORE, &ab_pci->flags);
589}
590
591static void ath11k_pci_aspm_restore(struct ath11k_pci *ab_pci)
592{
593 if (test_and_clear_bit(ATH11K_PCI_ASPM_RESTORE, &ab_pci->flags))
594 pcie_capability_clear_and_set_word(ab_pci->pdev, PCI_EXP_LNKCTL,
595 PCI_EXP_LNKCTL_ASPMC,
596 ab_pci->link_ctl &
597 PCI_EXP_LNKCTL_ASPMC);
598}
599
600static int ath11k_pci_power_up(struct ath11k_base *ab)
601{
602 struct ath11k_pci *ab_pci = ath11k_pci_priv(ab);
603 int ret;
604
605 ab_pci->register_window = 0;
606 clear_bit(ATH11K_FLAG_DEVICE_INIT_DONE, &ab->dev_flags);
607 ath11k_pci_sw_reset(ab_pci->ab, true);
608
609 /* Disable ASPM during firmware download due to problems switching
610 * to AMSS state.
611 */
612 ath11k_pci_aspm_disable(ab_pci);
613
614 ath11k_pci_msi_enable(ab_pci);
615
616 ret = ath11k_mhi_start(ab_pci);
617 if (ret) {
618 ath11k_err(ab, "failed to start mhi: %d\n", ret);
619 return ret;
620 }
621
622 if (ab->hw_params.static_window_map)
623 ath11k_pci_select_static_window(ab_pci);
624
625 return 0;
626}
627
628static void ath11k_pci_power_down(struct ath11k_base *ab)
629{
630 struct ath11k_pci *ab_pci = ath11k_pci_priv(ab);
631
632 /* restore aspm in case firmware bootup fails */
633 ath11k_pci_aspm_restore(ab_pci);
634
635 ath11k_pci_force_wake(ab_pci->ab);
636
637 ath11k_pci_msi_disable(ab_pci);
638
639 ath11k_mhi_stop(ab_pci);
640 clear_bit(ATH11K_FLAG_DEVICE_INIT_DONE, &ab->dev_flags);
641 ath11k_pci_sw_reset(ab_pci->ab, false);
642}
643
644static int ath11k_pci_hif_suspend(struct ath11k_base *ab)
645{
646 struct ath11k_pci *ar_pci = ath11k_pci_priv(ab);
647
648 return ath11k_mhi_suspend(ar_pci);
649}
650
651static int ath11k_pci_hif_resume(struct ath11k_base *ab)
652{
653 struct ath11k_pci *ar_pci = ath11k_pci_priv(ab);
654
655 return ath11k_mhi_resume(ar_pci);
656}
657
658static void ath11k_pci_hif_ce_irq_enable(struct ath11k_base *ab)
659{
660 ath11k_pcic_ce_irqs_enable(ab);
661}
662
663static void ath11k_pci_hif_ce_irq_disable(struct ath11k_base *ab)
664{
665 ath11k_pcic_ce_irq_disable_sync(ab);
666}
667
668static int ath11k_pci_start(struct ath11k_base *ab)
669{
670 struct ath11k_pci *ab_pci = ath11k_pci_priv(ab);
671
672 /* TODO: for now don't restore ASPM in case of single MSI
673 * vector as MHI register reading in M2 causes system hang.
674 */
675 if (test_bit(ATH11K_FLAG_MULTI_MSI_VECTORS, &ab->dev_flags))
676 ath11k_pci_aspm_restore(ab_pci);
677 else
678 ath11k_info(ab, "leaving PCI ASPM disabled to avoid MHI M2 problems\n");
679
680 ath11k_pcic_start(ab);
681
682 return 0;
683}
684
685static const struct ath11k_hif_ops ath11k_pci_hif_ops = {
686 .start = ath11k_pci_start,
687 .stop = ath11k_pcic_stop,
688 .read32 = ath11k_pcic_read32,
689 .write32 = ath11k_pcic_write32,
690 .read = ath11k_pcic_read,
691 .power_down = ath11k_pci_power_down,
692 .power_up = ath11k_pci_power_up,
693 .suspend = ath11k_pci_hif_suspend,
694 .resume = ath11k_pci_hif_resume,
695 .irq_enable = ath11k_pcic_ext_irq_enable,
696 .irq_disable = ath11k_pcic_ext_irq_disable,
697 .get_msi_address = ath11k_pcic_get_msi_address,
698 .get_user_msi_vector = ath11k_pcic_get_user_msi_assignment,
699 .map_service_to_pipe = ath11k_pcic_map_service_to_pipe,
700 .ce_irq_enable = ath11k_pci_hif_ce_irq_enable,
701 .ce_irq_disable = ath11k_pci_hif_ce_irq_disable,
702 .get_ce_msi_idx = ath11k_pcic_get_ce_msi_idx,
703};
704
705static void ath11k_pci_read_hw_version(struct ath11k_base *ab, u32 *major, u32 *minor)
706{
707 u32 soc_hw_version;
708
709 soc_hw_version = ath11k_pcic_read32(ab, TCSR_SOC_HW_VERSION);
710 *major = FIELD_GET(TCSR_SOC_HW_VERSION_MAJOR_MASK,
711 soc_hw_version);
712 *minor = FIELD_GET(TCSR_SOC_HW_VERSION_MINOR_MASK,
713 soc_hw_version);
714
715 ath11k_dbg(ab, ATH11K_DBG_PCI, "tcsr_soc_hw_version major %d minor %d\n",
716 *major, *minor);
717}
718
719static int ath11k_pci_set_irq_affinity_hint(struct ath11k_pci *ab_pci,
720 const struct cpumask *m)
721{
722 if (test_bit(ATH11K_FLAG_MULTI_MSI_VECTORS, &ab_pci->ab->dev_flags))
723 return 0;
724
725 return irq_set_affinity_hint(ab_pci->pdev->irq, m);
726}
727
728static int ath11k_pci_probe(struct pci_dev *pdev,
729 const struct pci_device_id *pci_dev)
730{
731 struct ath11k_base *ab;
732 struct ath11k_pci *ab_pci;
733 u32 soc_hw_version_major, soc_hw_version_minor, addr;
734 const struct ath11k_pci_ops *pci_ops;
735 int ret;
736
737 ab = ath11k_core_alloc(&pdev->dev, sizeof(*ab_pci), ATH11K_BUS_PCI);
738
739 if (!ab) {
740 dev_err(&pdev->dev, "failed to allocate ath11k base\n");
741 return -ENOMEM;
742 }
743
744 ab->dev = &pdev->dev;
745 pci_set_drvdata(pdev, ab);
746 ab_pci = ath11k_pci_priv(ab);
747 ab_pci->dev_id = pci_dev->device;
748 ab_pci->ab = ab;
749 ab_pci->pdev = pdev;
750 ab->hif.ops = &ath11k_pci_hif_ops;
751 ab->fw_mode = ATH11K_FIRMWARE_MODE_NORMAL;
752 pci_set_drvdata(pdev, ab);
753 spin_lock_init(&ab_pci->window_lock);
754
755 /* Set fixed_mem_region to true for platforms support reserved memory
756 * from DT. If memory is reserved from DT for FW, ath11k driver need not
757 * allocate memory.
758 */
759 ret = of_property_read_u32(ab->dev->of_node, "memory-region", &addr);
760 if (!ret)
761 set_bit(ATH11K_FLAG_FIXED_MEM_RGN, &ab->dev_flags);
762
763 ret = ath11k_pci_claim(ab_pci, pdev);
764 if (ret) {
765 ath11k_err(ab, "failed to claim device: %d\n", ret);
766 goto err_free_core;
767 }
768
769 ath11k_dbg(ab, ATH11K_DBG_BOOT, "pci probe %04x:%04x %04x:%04x\n",
770 pdev->vendor, pdev->device,
771 pdev->subsystem_vendor, pdev->subsystem_device);
772
773 ab->id.vendor = pdev->vendor;
774 ab->id.device = pdev->device;
775 ab->id.subsystem_vendor = pdev->subsystem_vendor;
776 ab->id.subsystem_device = pdev->subsystem_device;
777
778 switch (pci_dev->device) {
779 case QCA6390_DEVICE_ID:
780 ath11k_pci_read_hw_version(ab, &soc_hw_version_major,
781 &soc_hw_version_minor);
782 switch (soc_hw_version_major) {
783 case 2:
784 ab->hw_rev = ATH11K_HW_QCA6390_HW20;
785 break;
786 default:
787 dev_err(&pdev->dev, "Unsupported QCA6390 SOC hardware version: %d %d\n",
788 soc_hw_version_major, soc_hw_version_minor);
789 ret = -EOPNOTSUPP;
790 goto err_pci_free_region;
791 }
792
793 pci_ops = &ath11k_pci_ops_qca6390;
794 break;
795 case QCN9074_DEVICE_ID:
796 pci_ops = &ath11k_pci_ops_qcn9074;
797 ab->hw_rev = ATH11K_HW_QCN9074_HW10;
798 break;
799 case WCN6855_DEVICE_ID:
800 ab->id.bdf_search = ATH11K_BDF_SEARCH_BUS_AND_BOARD;
801 ath11k_pci_read_hw_version(ab, &soc_hw_version_major,
802 &soc_hw_version_minor);
803 switch (soc_hw_version_major) {
804 case 2:
805 switch (soc_hw_version_minor) {
806 case 0x00:
807 case 0x01:
808 ab->hw_rev = ATH11K_HW_WCN6855_HW20;
809 break;
810 case 0x10:
811 case 0x11:
812 ab->hw_rev = ATH11K_HW_WCN6855_HW21;
813 break;
814 default:
815 goto unsupported_wcn6855_soc;
816 }
817 break;
818 default:
819unsupported_wcn6855_soc:
820 dev_err(&pdev->dev, "Unsupported WCN6855 SOC hardware version: %d %d\n",
821 soc_hw_version_major, soc_hw_version_minor);
822 ret = -EOPNOTSUPP;
823 goto err_pci_free_region;
824 }
825
826 pci_ops = &ath11k_pci_ops_qca6390;
827 break;
828 default:
829 dev_err(&pdev->dev, "Unknown PCI device found: 0x%x\n",
830 pci_dev->device);
831 ret = -EOPNOTSUPP;
832 goto err_pci_free_region;
833 }
834
835 ret = ath11k_pcic_register_pci_ops(ab, pci_ops);
836 if (ret) {
837 ath11k_err(ab, "failed to register PCI ops: %d\n", ret);
838 goto err_pci_free_region;
839 }
840
841 ret = ath11k_pcic_init_msi_config(ab);
842 if (ret) {
843 ath11k_err(ab, "failed to init msi config: %d\n", ret);
844 goto err_pci_free_region;
845 }
846
847 ret = ath11k_pci_alloc_msi(ab_pci);
848 if (ret) {
849 ath11k_err(ab, "failed to enable msi: %d\n", ret);
850 goto err_pci_free_region;
851 }
852
853 ret = ath11k_core_pre_init(ab);
854 if (ret)
855 goto err_pci_disable_msi;
856
857 ret = ath11k_pci_set_irq_affinity_hint(ab_pci, cpumask_of(0));
858 if (ret) {
859 ath11k_err(ab, "failed to set irq affinity %d\n", ret);
860 goto err_pci_disable_msi;
861 }
862
863 ret = ath11k_mhi_register(ab_pci);
864 if (ret) {
865 ath11k_err(ab, "failed to register mhi: %d\n", ret);
866 goto err_irq_affinity_cleanup;
867 }
868
869 ret = ath11k_hal_srng_init(ab);
870 if (ret)
871 goto err_mhi_unregister;
872
873 ret = ath11k_ce_alloc_pipes(ab);
874 if (ret) {
875 ath11k_err(ab, "failed to allocate ce pipes: %d\n", ret);
876 goto err_hal_srng_deinit;
877 }
878
879 ath11k_pci_init_qmi_ce_config(ab);
880
881 ret = ath11k_pcic_config_irq(ab);
882 if (ret) {
883 ath11k_err(ab, "failed to config irq: %d\n", ret);
884 goto err_ce_free;
885 }
886
887 /* kernel may allocate a dummy vector before request_irq and
888 * then allocate a real vector when request_irq is called.
889 * So get msi_data here again to avoid spurious interrupt
890 * as msi_data will configured to srngs.
891 */
892 ret = ath11k_pci_config_msi_data(ab_pci);
893 if (ret) {
894 ath11k_err(ab, "failed to config msi_data: %d\n", ret);
895 goto err_free_irq;
896 }
897
898 ret = ath11k_core_init(ab);
899 if (ret) {
900 ath11k_err(ab, "failed to init core: %d\n", ret);
901 goto err_free_irq;
902 }
903 ath11k_qmi_fwreset_from_cold_boot(ab);
904 return 0;
905
906err_free_irq:
907 ath11k_pcic_free_irq(ab);
908
909err_ce_free:
910 ath11k_ce_free_pipes(ab);
911
912err_hal_srng_deinit:
913 ath11k_hal_srng_deinit(ab);
914
915err_mhi_unregister:
916 ath11k_mhi_unregister(ab_pci);
917
918err_irq_affinity_cleanup:
919 ath11k_pci_set_irq_affinity_hint(ab_pci, NULL);
920
921err_pci_disable_msi:
922 ath11k_pci_free_msi(ab_pci);
923
924err_pci_free_region:
925 ath11k_pci_free_region(ab_pci);
926
927err_free_core:
928 ath11k_core_free(ab);
929
930 return ret;
931}
932
933static void ath11k_pci_remove(struct pci_dev *pdev)
934{
935 struct ath11k_base *ab = pci_get_drvdata(pdev);
936 struct ath11k_pci *ab_pci = ath11k_pci_priv(ab);
937
938 ath11k_pci_set_irq_affinity_hint(ab_pci, NULL);
939
940 if (test_bit(ATH11K_FLAG_QMI_FAIL, &ab->dev_flags)) {
941 ath11k_pci_power_down(ab);
942 ath11k_debugfs_soc_destroy(ab);
943 ath11k_qmi_deinit_service(ab);
944 goto qmi_fail;
945 }
946
947 set_bit(ATH11K_FLAG_UNREGISTERING, &ab->dev_flags);
948
949 ath11k_core_deinit(ab);
950
951qmi_fail:
952 ath11k_mhi_unregister(ab_pci);
953
954 ath11k_pcic_free_irq(ab);
955 ath11k_pci_free_msi(ab_pci);
956 ath11k_pci_free_region(ab_pci);
957
958 ath11k_hal_srng_deinit(ab);
959 ath11k_ce_free_pipes(ab);
960 ath11k_core_free(ab);
961}
962
963static void ath11k_pci_shutdown(struct pci_dev *pdev)
964{
965 struct ath11k_base *ab = pci_get_drvdata(pdev);
966 struct ath11k_pci *ab_pci = ath11k_pci_priv(ab);
967
968 ath11k_pci_set_irq_affinity_hint(ab_pci, NULL);
969 ath11k_pci_power_down(ab);
970}
971
972static __maybe_unused int ath11k_pci_pm_suspend(struct device *dev)
973{
974 struct ath11k_base *ab = dev_get_drvdata(dev);
975 int ret;
976
977 if (test_bit(ATH11K_FLAG_QMI_FAIL, &ab->dev_flags)) {
978 ath11k_dbg(ab, ATH11K_DBG_BOOT, "boot skipping pci suspend as qmi is not initialised\n");
979 return 0;
980 }
981
982 ret = ath11k_core_suspend(ab);
983 if (ret)
984 ath11k_warn(ab, "failed to suspend core: %d\n", ret);
985
986 return 0;
987}
988
989static __maybe_unused int ath11k_pci_pm_resume(struct device *dev)
990{
991 struct ath11k_base *ab = dev_get_drvdata(dev);
992 int ret;
993
994 if (test_bit(ATH11K_FLAG_QMI_FAIL, &ab->dev_flags)) {
995 ath11k_dbg(ab, ATH11K_DBG_BOOT, "boot skipping pci resume as qmi is not initialised\n");
996 return 0;
997 }
998
999 ret = ath11k_core_resume(ab);
1000 if (ret)
1001 ath11k_warn(ab, "failed to resume core: %d\n", ret);
1002
1003 return ret;
1004}
1005
1006static SIMPLE_DEV_PM_OPS(ath11k_pci_pm_ops,
1007 ath11k_pci_pm_suspend,
1008 ath11k_pci_pm_resume);
1009
1010static struct pci_driver ath11k_pci_driver = {
1011 .name = "ath11k_pci",
1012 .id_table = ath11k_pci_id_table,
1013 .probe = ath11k_pci_probe,
1014 .remove = ath11k_pci_remove,
1015 .shutdown = ath11k_pci_shutdown,
1016#ifdef CONFIG_PM
1017 .driver.pm = &ath11k_pci_pm_ops,
1018#endif
1019};
1020
1021static int ath11k_pci_init(void)
1022{
1023 int ret;
1024
1025 ret = pci_register_driver(&ath11k_pci_driver);
1026 if (ret)
1027 pr_err("failed to register ath11k pci driver: %d\n",
1028 ret);
1029
1030 return ret;
1031}
1032module_init(ath11k_pci_init);
1033
1034static void ath11k_pci_exit(void)
1035{
1036 pci_unregister_driver(&ath11k_pci_driver);
1037}
1038
1039module_exit(ath11k_pci_exit);
1040
1041MODULE_DESCRIPTION("Driver support for Qualcomm Technologies PCIe 802.11ax WLAN devices");
1042MODULE_LICENSE("Dual BSD/GPL");
1043
1044/* firmware files */
1045MODULE_FIRMWARE(ATH11K_FW_DIR "/QCA6390/hw2.0/*");
1046MODULE_FIRMWARE(ATH11K_FW_DIR "/QCN9074/hw1.0/*");
1047MODULE_FIRMWARE(ATH11K_FW_DIR "/WCN6855/hw2.0/*");
1048MODULE_FIRMWARE(ATH11K_FW_DIR "/WCN6855/hw2.1/*");