Free Electrons

Embedded Linux Experts

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
/*
 * Copyright (c) 2012-2017 Qualcomm Atheros, Inc.
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <linux/module.h>
#include <linux/pci.h>
#include <linux/moduleparam.h>
#include <linux/interrupt.h>
#include <linux/suspend.h>
#include "wil6210.h"
#include <linux/rtnetlink.h>

static bool use_msi = true;
module_param(use_msi, bool, 0444);
MODULE_PARM_DESC(use_msi, " Use MSI interrupt, default - true");

static bool ftm_mode;
module_param(ftm_mode, bool, 0444);
MODULE_PARM_DESC(ftm_mode, " Set factory test mode, default - false");

#ifdef CONFIG_PM
#ifdef CONFIG_PM_SLEEP
static int wil6210_pm_notify(struct notifier_block *notify_block,
			     unsigned long mode, void *unused);
#endif /* CONFIG_PM_SLEEP */
#endif /* CONFIG_PM */

static
void wil_set_capabilities(struct wil6210_priv *wil)
{
	const char *wil_fw_name;
	u32 jtag_id = wil_r(wil, RGF_USER_JTAG_DEV_ID);
	u8 chip_revision = (wil_r(wil, RGF_USER_REVISION_ID) &
			    RGF_USER_REVISION_ID_MASK);

	bitmap_zero(wil->hw_capabilities, hw_capability_last);
	bitmap_zero(wil->fw_capabilities, WMI_FW_CAPABILITY_MAX);
	wil->wil_fw_name = ftm_mode ? WIL_FW_NAME_FTM_DEFAULT :
			   WIL_FW_NAME_DEFAULT;
	wil->chip_revision = chip_revision;

	switch (jtag_id) {
	case JTAG_DEV_ID_SPARROW:
		switch (chip_revision) {
		case REVISION_ID_SPARROW_D0:
			wil->hw_name = "Sparrow D0";
			wil->hw_version = HW_VER_SPARROW_D0;
			wil_fw_name = ftm_mode ? WIL_FW_NAME_FTM_SPARROW_PLUS :
				      WIL_FW_NAME_SPARROW_PLUS;

			if (wil_fw_verify_file_exists(wil, wil_fw_name))
				wil->wil_fw_name = wil_fw_name;
			break;
		case REVISION_ID_SPARROW_B0:
			wil->hw_name = "Sparrow B0";
			wil->hw_version = HW_VER_SPARROW_B0;
			break;
		default:
			wil->hw_name = "Unknown";
			wil->hw_version = HW_VER_UNKNOWN;
			break;
		}
		break;
	default:
		wil_err(wil, "Unknown board hardware, chip_id 0x%08x, chip_revision 0x%08x\n",
			jtag_id, chip_revision);
		wil->hw_name = "Unknown";
		wil->hw_version = HW_VER_UNKNOWN;
	}

	wil_info(wil, "Board hardware is %s\n", wil->hw_name);

	/* extract FW capabilities from file without loading the FW */
	wil_request_firmware(wil, wil->wil_fw_name, false);

	if (test_bit(WMI_FW_CAPABILITY_RSSI_REPORTING, wil->fw_capabilities))
		wil_to_wiphy(wil)->signal_type = CFG80211_SIGNAL_TYPE_MBM;
}

void wil_disable_irq(struct wil6210_priv *wil)
{
	disable_irq(wil->pdev->irq);
}

void wil_enable_irq(struct wil6210_priv *wil)
{
	enable_irq(wil->pdev->irq);
}

/* Bus ops */
static int wil_if_pcie_enable(struct wil6210_priv *wil)
{
	struct pci_dev *pdev = wil->pdev;
	int rc;
	/* on platforms with buggy ACPI, pdev->msi_enabled may be set to
	 * allow pci_enable_device to work. This indicates INTx was not routed
	 * and only MSI should be used
	 */
	int msi_only = pdev->msi_enabled;
	bool _use_msi = use_msi;
	bool wmi_only = test_bit(WMI_FW_CAPABILITY_WMI_ONLY,
				 wil->fw_capabilities);

	wil_dbg_misc(wil, "if_pcie_enable, wmi_only %d\n", wmi_only);

	pci_set_master(pdev);

	wil_dbg_misc(wil, "Setup %s interrupt\n", use_msi ? "MSI" : "INTx");

	if (use_msi && pci_enable_msi(pdev)) {
		wil_err(wil, "pci_enable_msi failed, use INTx\n");
		_use_msi = false;
	}

	if (!_use_msi && msi_only) {
		wil_err(wil, "Interrupt pin not routed, unable to use INTx\n");
		rc = -ENODEV;
		goto stop_master;
	}

	rc = wil6210_init_irq(wil, pdev->irq, _use_msi);
	if (rc)
		goto stop_master;

	/* need reset here to obtain MAC or in case of WMI-only FW, full reset
	 * and fw loading takes place
	 */
	mutex_lock(&wil->mutex);
	rc = wil_reset(wil, wmi_only);
	mutex_unlock(&wil->mutex);
	if (rc)
		goto release_irq;

	return 0;

 release_irq:
	wil6210_fini_irq(wil, pdev->irq);
	/* safe to call if no MSI */
	pci_disable_msi(pdev);
 stop_master:
	pci_clear_master(pdev);
	return rc;
}

static int wil_if_pcie_disable(struct wil6210_priv *wil)
{
	struct pci_dev *pdev = wil->pdev;

	wil_dbg_misc(wil, "if_pcie_disable\n");

	pci_clear_master(pdev);
	/* disable and release IRQ */
	wil6210_fini_irq(wil, pdev->irq);
	/* safe to call if no MSI */
	pci_disable_msi(pdev);
	/* TODO: disable HW */

	return 0;
}

static int wil_platform_rop_ramdump(void *wil_handle, void *buf, uint32_t size)
{
	struct wil6210_priv *wil = wil_handle;

	if (!wil)
		return -EINVAL;

	return wil_fw_copy_crash_dump(wil, buf, size);
}

static int wil_platform_rop_fw_recovery(void *wil_handle)
{
	struct wil6210_priv *wil = wil_handle;

	if (!wil)
		return -EINVAL;

	wil_fw_error_recovery(wil);

	return 0;
}

static void wil_platform_ops_uninit(struct wil6210_priv *wil)
{
	if (wil->platform_ops.uninit)
		wil->platform_ops.uninit(wil->platform_handle);
	memset(&wil->platform_ops, 0, sizeof(wil->platform_ops));
}

static int wil_pcie_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
	struct wil6210_priv *wil;
	struct device *dev = &pdev->dev;
	int rc;
	const struct wil_platform_rops rops = {
		.ramdump = wil_platform_rop_ramdump,
		.fw_recovery = wil_platform_rop_fw_recovery,
	};
	u32 bar_size = pci_resource_len(pdev, 0);

	/* check HW */
	dev_info(&pdev->dev, WIL_NAME
		 " device found [%04x:%04x] (rev %x) bar size 0x%x\n",
		 (int)pdev->vendor, (int)pdev->device, (int)pdev->revision,
		 bar_size);

	if ((bar_size < WIL6210_MIN_MEM_SIZE) ||
	    (bar_size > WIL6210_MAX_MEM_SIZE)) {
		dev_err(&pdev->dev, "Unexpected BAR0 size 0x%x\n",
			bar_size);
		return -ENODEV;
	}

	wil = wil_if_alloc(dev);
	if (IS_ERR(wil)) {
		rc = (int)PTR_ERR(wil);
		dev_err(dev, "wil_if_alloc failed: %d\n", rc);
		return rc;
	}

	wil->pdev = pdev;
	pci_set_drvdata(pdev, wil);
	wil->bar_size = bar_size;
	/* rollback to if_free */

	wil->platform_handle =
		wil_platform_init(&pdev->dev, &wil->platform_ops, &rops, wil);
	if (!wil->platform_handle) {
		rc = -ENODEV;
		wil_err(wil, "wil_platform_init failed\n");
		goto if_free;
	}
	/* rollback to err_plat */

	/* device supports 48bit addresses */
	rc = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(48));
	if (rc) {
		dev_err(dev, "dma_set_mask_and_coherent(48) failed: %d\n", rc);
		rc = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
		if (rc) {
			dev_err(dev,
				"dma_set_mask_and_coherent(32) failed: %d\n",
				rc);
			goto err_plat;
		}
	} else {
		wil->use_extended_dma_addr = 1;
	}

	rc = pci_enable_device(pdev);
	if (rc && pdev->msi_enabled == 0) {
		wil_err(wil,
			"pci_enable_device failed, retry with MSI only\n");
		/* Work around for platforms that can't allocate IRQ:
		 * retry with MSI only
		 */
		pdev->msi_enabled = 1;
		rc = pci_enable_device(pdev);
	}
	if (rc) {
		wil_err(wil,
			"pci_enable_device failed, even with MSI only\n");
		goto err_plat;
	}
	/* rollback to err_disable_pdev */
	pci_set_power_state(pdev, PCI_D0);

	rc = pci_request_region(pdev, 0, WIL_NAME);
	if (rc) {
		wil_err(wil, "pci_request_region failed\n");
		goto err_disable_pdev;
	}
	/* rollback to err_release_reg */

	wil->csr = pci_ioremap_bar(pdev, 0);
	if (!wil->csr) {
		wil_err(wil, "pci_ioremap_bar failed\n");
		rc = -ENODEV;
		goto err_release_reg;
	}
	/* rollback to err_iounmap */
	wil_info(wil, "CSR at %pR -> 0x%p\n", &pdev->resource[0], wil->csr);

	wil_set_capabilities(wil);
	wil6210_clear_irq(wil);

	wil->keep_radio_on_during_sleep =
		wil->platform_ops.keep_radio_on_during_sleep &&
		wil->platform_ops.keep_radio_on_during_sleep(
			wil->platform_handle) &&
		test_bit(WMI_FW_CAPABILITY_D3_SUSPEND, wil->fw_capabilities);

	wil_info(wil, "keep_radio_on_during_sleep (%d)\n",
		 wil->keep_radio_on_during_sleep);

	/* FW should raise IRQ when ready */
	rc = wil_if_pcie_enable(wil);
	if (rc) {
		wil_err(wil, "Enable device failed\n");
		goto err_iounmap;
	}
	/* rollback to bus_disable */

	rc = wil_if_add(wil);
	if (rc) {
		wil_err(wil, "wil_if_add failed: %d\n", rc);
		goto bus_disable;
	}

#ifdef CONFIG_PM
#ifdef CONFIG_PM_SLEEP
	wil->pm_notify.notifier_call = wil6210_pm_notify;
	rc = register_pm_notifier(&wil->pm_notify);
	if (rc)
		/* Do not fail the driver initialization, as suspend can
		 * be prevented in a later phase if needed
		 */
		wil_err(wil, "register_pm_notifier failed: %d\n", rc);
#endif /* CONFIG_PM_SLEEP */
#endif /* CONFIG_PM */

	wil6210_debugfs_init(wil);


	return 0;

bus_disable:
	wil_if_pcie_disable(wil);
err_iounmap:
	pci_iounmap(pdev, wil->csr);
err_release_reg:
	pci_release_region(pdev, 0);
err_disable_pdev:
	pci_disable_device(pdev);
err_plat:
	wil_platform_ops_uninit(wil);
if_free:
	wil_if_free(wil);

	return rc;
}

static void wil_pcie_remove(struct pci_dev *pdev)
{
	struct wil6210_priv *wil = pci_get_drvdata(pdev);
	void __iomem *csr = wil->csr;

	wil_dbg_misc(wil, "pcie_remove\n");

#ifdef CONFIG_PM
#ifdef CONFIG_PM_SLEEP
	unregister_pm_notifier(&wil->pm_notify);
#endif /* CONFIG_PM_SLEEP */
#endif /* CONFIG_PM */

	wil6210_debugfs_remove(wil);
	rtnl_lock();
	wil_p2p_wdev_free(wil);
	rtnl_unlock();
	wil_if_remove(wil);
	wil_if_pcie_disable(wil);
	pci_iounmap(pdev, csr);
	pci_release_region(pdev, 0);
	pci_disable_device(pdev);
	wil_platform_ops_uninit(wil);
	wil_if_free(wil);
}

static const struct pci_device_id wil6210_pcie_ids[] = {
	{ PCI_DEVICE(0x1ae9, 0x0310) },
	{ PCI_DEVICE(0x1ae9, 0x0302) }, /* same as above, firmware broken */
	{ /* end: all zeroes */	},
};
MODULE_DEVICE_TABLE(pci, wil6210_pcie_ids);

#ifdef CONFIG_PM
#ifdef CONFIG_PM_SLEEP

static int wil6210_suspend(struct device *dev, bool is_runtime)
{
	int rc = 0;
	struct pci_dev *pdev = to_pci_dev(dev);
	struct wil6210_priv *wil = pci_get_drvdata(pdev);

	wil_dbg_pm(wil, "suspend: %s\n", is_runtime ? "runtime" : "system");

	rc = wil_can_suspend(wil, is_runtime);
	if (rc)
		goto out;

	rc = wil_suspend(wil, is_runtime);
	if (!rc) {
		wil->suspend_stats.successful_suspends++;

		/* If platform device supports keep_radio_on_during_sleep
		 * it will control PCIe master
		 */
		if (!wil->keep_radio_on_during_sleep)
			/* disable bus mastering */
			pci_clear_master(pdev);
	}
out:
	return rc;
}

static int wil6210_resume(struct device *dev, bool is_runtime)
{
	int rc = 0;
	struct pci_dev *pdev = to_pci_dev(dev);
	struct wil6210_priv *wil = pci_get_drvdata(pdev);

	wil_dbg_pm(wil, "resume: %s\n", is_runtime ? "runtime" : "system");

	/* If platform device supports keep_radio_on_during_sleep it will
	 * control PCIe master
	 */
	if (!wil->keep_radio_on_during_sleep)
		/* allow master */
		pci_set_master(pdev);
	rc = wil_resume(wil, is_runtime);
	if (rc) {
		wil_err(wil, "device failed to resume (%d)\n", rc);
		wil->suspend_stats.failed_resumes++;
		if (!wil->keep_radio_on_during_sleep)
			pci_clear_master(pdev);
	} else {
		wil->suspend_stats.successful_resumes++;
	}

	return rc;
}

static int wil6210_pm_notify(struct notifier_block *notify_block,
			     unsigned long mode, void *unused)
{
	struct wil6210_priv *wil = container_of(
		notify_block, struct wil6210_priv, pm_notify);
	int rc = 0;
	enum wil_platform_event evt;

	wil_dbg_pm(wil, "pm_notify: mode (%ld)\n", mode);

	switch (mode) {
	case PM_HIBERNATION_PREPARE:
	case PM_SUSPEND_PREPARE:
	case PM_RESTORE_PREPARE:
		rc = wil_can_suspend(wil, false);
		if (rc)
			break;
		evt = WIL_PLATFORM_EVT_PRE_SUSPEND;
		if (wil->platform_ops.notify)
			rc = wil->platform_ops.notify(wil->platform_handle,
						      evt);
		break;
	case PM_POST_SUSPEND:
	case PM_POST_HIBERNATION:
	case PM_POST_RESTORE:
		evt = WIL_PLATFORM_EVT_POST_SUSPEND;
		if (wil->platform_ops.notify)
			rc = wil->platform_ops.notify(wil->platform_handle,
						      evt);
		break;
	default:
		wil_dbg_pm(wil, "unhandled notify mode %ld\n", mode);
		break;
	}

	wil_dbg_pm(wil, "notification mode %ld: rc (%d)\n", mode, rc);
	return rc;
}

static int wil6210_pm_suspend(struct device *dev)
{
	return wil6210_suspend(dev, false);
}

static int wil6210_pm_resume(struct device *dev)
{
	return wil6210_resume(dev, false);
}
#endif /* CONFIG_PM_SLEEP */

#endif /* CONFIG_PM */

static const struct dev_pm_ops wil6210_pm_ops = {
	SET_SYSTEM_SLEEP_PM_OPS(wil6210_pm_suspend, wil6210_pm_resume)
};

static struct pci_driver wil6210_driver = {
	.probe		= wil_pcie_probe,
	.remove		= wil_pcie_remove,
	.id_table	= wil6210_pcie_ids,
	.name		= WIL_NAME,
	.driver		= {
		.pm = &wil6210_pm_ops,
	},
};

static int __init wil6210_driver_init(void)
{
	int rc;

	rc = wil_platform_modinit();
	if (rc)
		return rc;

	rc = pci_register_driver(&wil6210_driver);
	if (rc)
		wil_platform_modexit();
	return rc;
}
module_init(wil6210_driver_init);

static void __exit wil6210_driver_exit(void)
{
	pci_unregister_driver(&wil6210_driver);
	wil_platform_modexit();
}
module_exit(wil6210_driver_exit);

MODULE_LICENSE("Dual BSD/GPL");
MODULE_AUTHOR("Qualcomm Atheros <wil6210@qca.qualcomm.com>");
MODULE_DESCRIPTION("Driver for 60g WiFi WIL6210 card");