xref: /openbmc/linux/sound/pci/hda/hda_intel.c (revision 4e95bc26)
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  *
4  *  hda_intel.c - Implementation of primary alsa driver code base
5  *                for Intel HD Audio.
6  *
7  *  Copyright(c) 2004 Intel Corporation. All rights reserved.
8  *
9  *  Copyright (c) 2004 Takashi Iwai <tiwai@suse.de>
10  *                     PeiSen Hou <pshou@realtek.com.tw>
11  *
12  *  CONTACTS:
13  *
14  *  Matt Jared		matt.jared@intel.com
15  *  Andy Kopp		andy.kopp@intel.com
16  *  Dan Kogan		dan.d.kogan@intel.com
17  *
18  *  CHANGES:
19  *
20  *  2004.12.01	Major rewrite by tiwai, merged the work of pshou
21  */
22 
23 #include <linux/delay.h>
24 #include <linux/interrupt.h>
25 #include <linux/kernel.h>
26 #include <linux/module.h>
27 #include <linux/dma-mapping.h>
28 #include <linux/moduleparam.h>
29 #include <linux/init.h>
30 #include <linux/slab.h>
31 #include <linux/pci.h>
32 #include <linux/mutex.h>
33 #include <linux/io.h>
34 #include <linux/pm_runtime.h>
35 #include <linux/clocksource.h>
36 #include <linux/time.h>
37 #include <linux/completion.h>
38 
39 #ifdef CONFIG_X86
40 /* for snoop control */
41 #include <asm/pgtable.h>
42 #include <asm/set_memory.h>
43 #include <asm/cpufeature.h>
44 #endif
45 #include <sound/core.h>
46 #include <sound/initval.h>
47 #include <sound/hdaudio.h>
48 #include <sound/hda_i915.h>
49 #include <linux/vgaarb.h>
50 #include <linux/vga_switcheroo.h>
51 #include <linux/firmware.h>
52 #include <sound/hda_codec.h>
53 #include "hda_controller.h"
54 #include "hda_intel.h"
55 
56 #define CREATE_TRACE_POINTS
57 #include "hda_intel_trace.h"
58 
59 /* position fix mode */
60 enum {
61 	POS_FIX_AUTO,
62 	POS_FIX_LPIB,
63 	POS_FIX_POSBUF,
64 	POS_FIX_VIACOMBO,
65 	POS_FIX_COMBO,
66 	POS_FIX_SKL,
67 };
68 
69 /* Defines for ATI HD Audio support in SB450 south bridge */
70 #define ATI_SB450_HDAUDIO_MISC_CNTR2_ADDR   0x42
71 #define ATI_SB450_HDAUDIO_ENABLE_SNOOP      0x02
72 
73 /* Defines for Nvidia HDA support */
74 #define NVIDIA_HDA_TRANSREG_ADDR      0x4e
75 #define NVIDIA_HDA_ENABLE_COHBITS     0x0f
76 #define NVIDIA_HDA_ISTRM_COH          0x4d
77 #define NVIDIA_HDA_OSTRM_COH          0x4c
78 #define NVIDIA_HDA_ENABLE_COHBIT      0x01
79 
80 /* Defines for Intel SCH HDA snoop control */
81 #define INTEL_HDA_CGCTL	 0x48
82 #define INTEL_HDA_CGCTL_MISCBDCGE        (0x1 << 6)
83 #define INTEL_SCH_HDA_DEVC      0x78
84 #define INTEL_SCH_HDA_DEVC_NOSNOOP       (0x1<<11)
85 
86 /* Define IN stream 0 FIFO size offset in VIA controller */
87 #define VIA_IN_STREAM0_FIFO_SIZE_OFFSET	0x90
88 /* Define VIA HD Audio Device ID*/
89 #define VIA_HDAC_DEVICE_ID		0x3288
90 
91 /* max number of SDs */
92 /* ICH, ATI and VIA have 4 playback and 4 capture */
93 #define ICH6_NUM_CAPTURE	4
94 #define ICH6_NUM_PLAYBACK	4
95 
96 /* ULI has 6 playback and 5 capture */
97 #define ULI_NUM_CAPTURE		5
98 #define ULI_NUM_PLAYBACK	6
99 
100 /* ATI HDMI may have up to 8 playbacks and 0 capture */
101 #define ATIHDMI_NUM_CAPTURE	0
102 #define ATIHDMI_NUM_PLAYBACK	8
103 
104 /* TERA has 4 playback and 3 capture */
105 #define TERA_NUM_CAPTURE	3
106 #define TERA_NUM_PLAYBACK	4
107 
108 
109 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
110 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
111 static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
112 static char *model[SNDRV_CARDS];
113 static int position_fix[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = -1};
114 static int bdl_pos_adj[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = -1};
115 static int probe_mask[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = -1};
116 static int probe_only[SNDRV_CARDS];
117 static int jackpoll_ms[SNDRV_CARDS];
118 static int single_cmd = -1;
119 static int enable_msi = -1;
120 #ifdef CONFIG_SND_HDA_PATCH_LOADER
121 static char *patch[SNDRV_CARDS];
122 #endif
123 #ifdef CONFIG_SND_HDA_INPUT_BEEP
124 static bool beep_mode[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] =
125 					CONFIG_SND_HDA_INPUT_BEEP_MODE};
126 #endif
127 
128 module_param_array(index, int, NULL, 0444);
129 MODULE_PARM_DESC(index, "Index value for Intel HD audio interface.");
130 module_param_array(id, charp, NULL, 0444);
131 MODULE_PARM_DESC(id, "ID string for Intel HD audio interface.");
132 module_param_array(enable, bool, NULL, 0444);
133 MODULE_PARM_DESC(enable, "Enable Intel HD audio interface.");
134 module_param_array(model, charp, NULL, 0444);
135 MODULE_PARM_DESC(model, "Use the given board model.");
136 module_param_array(position_fix, int, NULL, 0444);
137 MODULE_PARM_DESC(position_fix, "DMA pointer read method."
138 		 "(-1 = system default, 0 = auto, 1 = LPIB, 2 = POSBUF, 3 = VIACOMBO, 4 = COMBO, 5 = SKL+).");
139 module_param_array(bdl_pos_adj, int, NULL, 0644);
140 MODULE_PARM_DESC(bdl_pos_adj, "BDL position adjustment offset.");
141 module_param_array(probe_mask, int, NULL, 0444);
142 MODULE_PARM_DESC(probe_mask, "Bitmask to probe codecs (default = -1).");
143 module_param_array(probe_only, int, NULL, 0444);
144 MODULE_PARM_DESC(probe_only, "Only probing and no codec initialization.");
145 module_param_array(jackpoll_ms, int, NULL, 0444);
146 MODULE_PARM_DESC(jackpoll_ms, "Ms between polling for jack events (default = 0, using unsol events only)");
147 module_param(single_cmd, bint, 0444);
148 MODULE_PARM_DESC(single_cmd, "Use single command to communicate with codecs "
149 		 "(for debugging only).");
150 module_param(enable_msi, bint, 0444);
151 MODULE_PARM_DESC(enable_msi, "Enable Message Signaled Interrupt (MSI)");
152 #ifdef CONFIG_SND_HDA_PATCH_LOADER
153 module_param_array(patch, charp, NULL, 0444);
154 MODULE_PARM_DESC(patch, "Patch file for Intel HD audio interface.");
155 #endif
156 #ifdef CONFIG_SND_HDA_INPUT_BEEP
157 module_param_array(beep_mode, bool, NULL, 0444);
158 MODULE_PARM_DESC(beep_mode, "Select HDA Beep registration mode "
159 			    "(0=off, 1=on) (default=1).");
160 #endif
161 
162 #ifdef CONFIG_PM
163 static int param_set_xint(const char *val, const struct kernel_param *kp);
164 static const struct kernel_param_ops param_ops_xint = {
165 	.set = param_set_xint,
166 	.get = param_get_int,
167 };
168 #define param_check_xint param_check_int
169 
170 static int power_save = CONFIG_SND_HDA_POWER_SAVE_DEFAULT;
171 module_param(power_save, xint, 0644);
172 MODULE_PARM_DESC(power_save, "Automatic power-saving timeout "
173 		 "(in second, 0 = disable).");
174 
175 static bool pm_blacklist = true;
176 module_param(pm_blacklist, bool, 0644);
177 MODULE_PARM_DESC(pm_blacklist, "Enable power-management blacklist");
178 
179 /* reset the HD-audio controller in power save mode.
180  * this may give more power-saving, but will take longer time to
181  * wake up.
182  */
183 static bool power_save_controller = 1;
184 module_param(power_save_controller, bool, 0644);
185 MODULE_PARM_DESC(power_save_controller, "Reset controller in power save mode.");
186 #else
187 #define power_save	0
188 #endif /* CONFIG_PM */
189 
190 static int align_buffer_size = -1;
191 module_param(align_buffer_size, bint, 0644);
192 MODULE_PARM_DESC(align_buffer_size,
193 		"Force buffer and period sizes to be multiple of 128 bytes.");
194 
195 #ifdef CONFIG_X86
196 static int hda_snoop = -1;
197 module_param_named(snoop, hda_snoop, bint, 0444);
198 MODULE_PARM_DESC(snoop, "Enable/disable snooping");
199 #else
200 #define hda_snoop		true
201 #endif
202 
203 
204 MODULE_LICENSE("GPL");
205 MODULE_SUPPORTED_DEVICE("{{Intel, ICH6},"
206 			 "{Intel, ICH6M},"
207 			 "{Intel, ICH7},"
208 			 "{Intel, ESB2},"
209 			 "{Intel, ICH8},"
210 			 "{Intel, ICH9},"
211 			 "{Intel, ICH10},"
212 			 "{Intel, PCH},"
213 			 "{Intel, CPT},"
214 			 "{Intel, PPT},"
215 			 "{Intel, LPT},"
216 			 "{Intel, LPT_LP},"
217 			 "{Intel, WPT_LP},"
218 			 "{Intel, SPT},"
219 			 "{Intel, SPT_LP},"
220 			 "{Intel, HPT},"
221 			 "{Intel, PBG},"
222 			 "{Intel, SCH},"
223 			 "{ATI, SB450},"
224 			 "{ATI, SB600},"
225 			 "{ATI, RS600},"
226 			 "{ATI, RS690},"
227 			 "{ATI, RS780},"
228 			 "{ATI, R600},"
229 			 "{ATI, RV630},"
230 			 "{ATI, RV610},"
231 			 "{ATI, RV670},"
232 			 "{ATI, RV635},"
233 			 "{ATI, RV620},"
234 			 "{ATI, RV770},"
235 			 "{VIA, VT8251},"
236 			 "{VIA, VT8237A},"
237 			 "{SiS, SIS966},"
238 			 "{ULI, M5461}}");
239 MODULE_DESCRIPTION("Intel HDA driver");
240 
241 #if defined(CONFIG_PM) && defined(CONFIG_VGA_SWITCHEROO)
242 #if IS_ENABLED(CONFIG_SND_HDA_CODEC_HDMI)
243 #define SUPPORT_VGA_SWITCHEROO
244 #endif
245 #endif
246 
247 
248 /*
249  */
250 
251 /* driver types */
252 enum {
253 	AZX_DRIVER_ICH,
254 	AZX_DRIVER_PCH,
255 	AZX_DRIVER_SCH,
256 	AZX_DRIVER_SKL,
257 	AZX_DRIVER_HDMI,
258 	AZX_DRIVER_ATI,
259 	AZX_DRIVER_ATIHDMI,
260 	AZX_DRIVER_ATIHDMI_NS,
261 	AZX_DRIVER_VIA,
262 	AZX_DRIVER_SIS,
263 	AZX_DRIVER_ULI,
264 	AZX_DRIVER_NVIDIA,
265 	AZX_DRIVER_TERA,
266 	AZX_DRIVER_CTX,
267 	AZX_DRIVER_CTHDA,
268 	AZX_DRIVER_CMEDIA,
269 	AZX_DRIVER_GENERIC,
270 	AZX_NUM_DRIVERS, /* keep this as last entry */
271 };
272 
273 #define azx_get_snoop_type(chip) \
274 	(((chip)->driver_caps & AZX_DCAPS_SNOOP_MASK) >> 10)
275 #define AZX_DCAPS_SNOOP_TYPE(type) ((AZX_SNOOP_TYPE_ ## type) << 10)
276 
277 /* quirks for old Intel chipsets */
278 #define AZX_DCAPS_INTEL_ICH \
279 	(AZX_DCAPS_OLD_SSYNC | AZX_DCAPS_NO_ALIGN_BUFSIZE)
280 
281 /* quirks for Intel PCH */
282 #define AZX_DCAPS_INTEL_PCH_BASE \
283 	(AZX_DCAPS_NO_ALIGN_BUFSIZE | AZX_DCAPS_COUNT_LPIB_DELAY |\
284 	 AZX_DCAPS_SNOOP_TYPE(SCH))
285 
286 /* PCH up to IVB; no runtime PM; bind with i915 gfx */
287 #define AZX_DCAPS_INTEL_PCH_NOPM \
288 	(AZX_DCAPS_INTEL_PCH_BASE | AZX_DCAPS_I915_COMPONENT)
289 
290 /* PCH for HSW/BDW; with runtime PM */
291 /* no i915 binding for this as HSW/BDW has another controller for HDMI */
292 #define AZX_DCAPS_INTEL_PCH \
293 	(AZX_DCAPS_INTEL_PCH_BASE | AZX_DCAPS_PM_RUNTIME)
294 
295 /* HSW HDMI */
296 #define AZX_DCAPS_INTEL_HASWELL \
297 	(/*AZX_DCAPS_ALIGN_BUFSIZE |*/ AZX_DCAPS_COUNT_LPIB_DELAY |\
298 	 AZX_DCAPS_PM_RUNTIME | AZX_DCAPS_I915_COMPONENT |\
299 	 AZX_DCAPS_SNOOP_TYPE(SCH))
300 
301 /* Broadwell HDMI can't use position buffer reliably, force to use LPIB */
302 #define AZX_DCAPS_INTEL_BROADWELL \
303 	(/*AZX_DCAPS_ALIGN_BUFSIZE |*/ AZX_DCAPS_POSFIX_LPIB |\
304 	 AZX_DCAPS_PM_RUNTIME | AZX_DCAPS_I915_COMPONENT |\
305 	 AZX_DCAPS_SNOOP_TYPE(SCH))
306 
307 #define AZX_DCAPS_INTEL_BAYTRAIL \
308 	(AZX_DCAPS_INTEL_PCH_BASE | AZX_DCAPS_I915_COMPONENT)
309 
310 #define AZX_DCAPS_INTEL_BRASWELL \
311 	(AZX_DCAPS_INTEL_PCH_BASE | AZX_DCAPS_PM_RUNTIME |\
312 	 AZX_DCAPS_I915_COMPONENT)
313 
314 #define AZX_DCAPS_INTEL_SKYLAKE \
315 	(AZX_DCAPS_INTEL_PCH_BASE | AZX_DCAPS_PM_RUNTIME |\
316 	 AZX_DCAPS_SEPARATE_STREAM_TAG | AZX_DCAPS_I915_COMPONENT)
317 
318 #define AZX_DCAPS_INTEL_BROXTON \
319 	(AZX_DCAPS_INTEL_PCH_BASE | AZX_DCAPS_PM_RUNTIME |\
320 	 AZX_DCAPS_SEPARATE_STREAM_TAG | AZX_DCAPS_I915_COMPONENT)
321 
322 /* quirks for ATI SB / AMD Hudson */
323 #define AZX_DCAPS_PRESET_ATI_SB \
324 	(AZX_DCAPS_NO_TCSEL | AZX_DCAPS_SYNC_WRITE | AZX_DCAPS_POSFIX_LPIB |\
325 	 AZX_DCAPS_SNOOP_TYPE(ATI))
326 
327 /* quirks for ATI/AMD HDMI */
328 #define AZX_DCAPS_PRESET_ATI_HDMI \
329 	(AZX_DCAPS_NO_TCSEL | AZX_DCAPS_SYNC_WRITE | AZX_DCAPS_POSFIX_LPIB|\
330 	 AZX_DCAPS_NO_MSI64)
331 
332 /* quirks for ATI HDMI with snoop off */
333 #define AZX_DCAPS_PRESET_ATI_HDMI_NS \
334 	(AZX_DCAPS_PRESET_ATI_HDMI | AZX_DCAPS_SNOOP_OFF)
335 
336 /* quirks for Nvidia */
337 #define AZX_DCAPS_PRESET_NVIDIA \
338 	(AZX_DCAPS_NO_MSI | AZX_DCAPS_CORBRP_SELF_CLEAR |\
339 	 AZX_DCAPS_SNOOP_TYPE(NVIDIA))
340 
341 #define AZX_DCAPS_PRESET_CTHDA \
342 	(AZX_DCAPS_NO_MSI | AZX_DCAPS_POSFIX_LPIB |\
343 	 AZX_DCAPS_NO_64BIT |\
344 	 AZX_DCAPS_4K_BDLE_BOUNDARY | AZX_DCAPS_SNOOP_OFF)
345 
346 /*
347  * vga_switcheroo support
348  */
349 #ifdef SUPPORT_VGA_SWITCHEROO
350 #define use_vga_switcheroo(chip)	((chip)->use_vga_switcheroo)
351 #define needs_eld_notify_link(chip)	((chip)->need_eld_notify_link)
352 #else
353 #define use_vga_switcheroo(chip)	0
354 #define needs_eld_notify_link(chip)	false
355 #endif
356 
357 #define CONTROLLER_IN_GPU(pci) (((pci)->device == 0x0a0c) || \
358 					((pci)->device == 0x0c0c) || \
359 					((pci)->device == 0x0d0c) || \
360 					((pci)->device == 0x160c))
361 
362 #define IS_BXT(pci) ((pci)->vendor == 0x8086 && (pci)->device == 0x5a98)
363 #define IS_CFL(pci) ((pci)->vendor == 0x8086 && (pci)->device == 0xa348)
364 #define IS_CNL(pci) ((pci)->vendor == 0x8086 && (pci)->device == 0x9dc8)
365 
366 static char *driver_short_names[] = {
367 	[AZX_DRIVER_ICH] = "HDA Intel",
368 	[AZX_DRIVER_PCH] = "HDA Intel PCH",
369 	[AZX_DRIVER_SCH] = "HDA Intel MID",
370 	[AZX_DRIVER_SKL] = "HDA Intel PCH", /* kept old name for compatibility */
371 	[AZX_DRIVER_HDMI] = "HDA Intel HDMI",
372 	[AZX_DRIVER_ATI] = "HDA ATI SB",
373 	[AZX_DRIVER_ATIHDMI] = "HDA ATI HDMI",
374 	[AZX_DRIVER_ATIHDMI_NS] = "HDA ATI HDMI",
375 	[AZX_DRIVER_VIA] = "HDA VIA VT82xx",
376 	[AZX_DRIVER_SIS] = "HDA SIS966",
377 	[AZX_DRIVER_ULI] = "HDA ULI M5461",
378 	[AZX_DRIVER_NVIDIA] = "HDA NVidia",
379 	[AZX_DRIVER_TERA] = "HDA Teradici",
380 	[AZX_DRIVER_CTX] = "HDA Creative",
381 	[AZX_DRIVER_CTHDA] = "HDA Creative",
382 	[AZX_DRIVER_CMEDIA] = "HDA C-Media",
383 	[AZX_DRIVER_GENERIC] = "HD-Audio Generic",
384 };
385 
386 static int azx_acquire_irq(struct azx *chip, int do_disconnect);
387 static void set_default_power_save(struct azx *chip);
388 
389 /*
390  * initialize the PCI registers
391  */
392 /* update bits in a PCI register byte */
393 static void update_pci_byte(struct pci_dev *pci, unsigned int reg,
394 			    unsigned char mask, unsigned char val)
395 {
396 	unsigned char data;
397 
398 	pci_read_config_byte(pci, reg, &data);
399 	data &= ~mask;
400 	data |= (val & mask);
401 	pci_write_config_byte(pci, reg, data);
402 }
403 
404 static void azx_init_pci(struct azx *chip)
405 {
406 	int snoop_type = azx_get_snoop_type(chip);
407 
408 	/* Clear bits 0-2 of PCI register TCSEL (at offset 0x44)
409 	 * TCSEL == Traffic Class Select Register, which sets PCI express QOS
410 	 * Ensuring these bits are 0 clears playback static on some HD Audio
411 	 * codecs.
412 	 * The PCI register TCSEL is defined in the Intel manuals.
413 	 */
414 	if (!(chip->driver_caps & AZX_DCAPS_NO_TCSEL)) {
415 		dev_dbg(chip->card->dev, "Clearing TCSEL\n");
416 		update_pci_byte(chip->pci, AZX_PCIREG_TCSEL, 0x07, 0);
417 	}
418 
419 	/* For ATI SB450/600/700/800/900 and AMD Hudson azalia HD audio,
420 	 * we need to enable snoop.
421 	 */
422 	if (snoop_type == AZX_SNOOP_TYPE_ATI) {
423 		dev_dbg(chip->card->dev, "Setting ATI snoop: %d\n",
424 			azx_snoop(chip));
425 		update_pci_byte(chip->pci,
426 				ATI_SB450_HDAUDIO_MISC_CNTR2_ADDR, 0x07,
427 				azx_snoop(chip) ? ATI_SB450_HDAUDIO_ENABLE_SNOOP : 0);
428 	}
429 
430 	/* For NVIDIA HDA, enable snoop */
431 	if (snoop_type == AZX_SNOOP_TYPE_NVIDIA) {
432 		dev_dbg(chip->card->dev, "Setting Nvidia snoop: %d\n",
433 			azx_snoop(chip));
434 		update_pci_byte(chip->pci,
435 				NVIDIA_HDA_TRANSREG_ADDR,
436 				0x0f, NVIDIA_HDA_ENABLE_COHBITS);
437 		update_pci_byte(chip->pci,
438 				NVIDIA_HDA_ISTRM_COH,
439 				0x01, NVIDIA_HDA_ENABLE_COHBIT);
440 		update_pci_byte(chip->pci,
441 				NVIDIA_HDA_OSTRM_COH,
442 				0x01, NVIDIA_HDA_ENABLE_COHBIT);
443 	}
444 
445 	/* Enable SCH/PCH snoop if needed */
446 	if (snoop_type == AZX_SNOOP_TYPE_SCH) {
447 		unsigned short snoop;
448 		pci_read_config_word(chip->pci, INTEL_SCH_HDA_DEVC, &snoop);
449 		if ((!azx_snoop(chip) && !(snoop & INTEL_SCH_HDA_DEVC_NOSNOOP)) ||
450 		    (azx_snoop(chip) && (snoop & INTEL_SCH_HDA_DEVC_NOSNOOP))) {
451 			snoop &= ~INTEL_SCH_HDA_DEVC_NOSNOOP;
452 			if (!azx_snoop(chip))
453 				snoop |= INTEL_SCH_HDA_DEVC_NOSNOOP;
454 			pci_write_config_word(chip->pci, INTEL_SCH_HDA_DEVC, snoop);
455 			pci_read_config_word(chip->pci,
456 				INTEL_SCH_HDA_DEVC, &snoop);
457 		}
458 		dev_dbg(chip->card->dev, "SCH snoop: %s\n",
459 			(snoop & INTEL_SCH_HDA_DEVC_NOSNOOP) ?
460 			"Disabled" : "Enabled");
461         }
462 }
463 
464 /*
465  * In BXT-P A0, HD-Audio DMA requests is later than expected,
466  * and makes an audio stream sensitive to system latencies when
467  * 24/32 bits are playing.
468  * Adjusting threshold of DMA fifo to force the DMA request
469  * sooner to improve latency tolerance at the expense of power.
470  */
471 static void bxt_reduce_dma_latency(struct azx *chip)
472 {
473 	u32 val;
474 
475 	val = azx_readl(chip, VS_EM4L);
476 	val &= (0x3 << 20);
477 	azx_writel(chip, VS_EM4L, val);
478 }
479 
480 /*
481  * ML_LCAP bits:
482  *  bit 0: 6 MHz Supported
483  *  bit 1: 12 MHz Supported
484  *  bit 2: 24 MHz Supported
485  *  bit 3: 48 MHz Supported
486  *  bit 4: 96 MHz Supported
487  *  bit 5: 192 MHz Supported
488  */
489 static int intel_get_lctl_scf(struct azx *chip)
490 {
491 	struct hdac_bus *bus = azx_bus(chip);
492 	static int preferred_bits[] = { 2, 3, 1, 4, 5 };
493 	u32 val, t;
494 	int i;
495 
496 	val = readl(bus->mlcap + AZX_ML_BASE + AZX_REG_ML_LCAP);
497 
498 	for (i = 0; i < ARRAY_SIZE(preferred_bits); i++) {
499 		t = preferred_bits[i];
500 		if (val & (1 << t))
501 			return t;
502 	}
503 
504 	dev_warn(chip->card->dev, "set audio clock frequency to 6MHz");
505 	return 0;
506 }
507 
508 static int intel_ml_lctl_set_power(struct azx *chip, int state)
509 {
510 	struct hdac_bus *bus = azx_bus(chip);
511 	u32 val;
512 	int timeout;
513 
514 	/*
515 	 * the codecs are sharing the first link setting by default
516 	 * If other links are enabled for stream, they need similar fix
517 	 */
518 	val = readl(bus->mlcap + AZX_ML_BASE + AZX_REG_ML_LCTL);
519 	val &= ~AZX_MLCTL_SPA;
520 	val |= state << AZX_MLCTL_SPA_SHIFT;
521 	writel(val, bus->mlcap + AZX_ML_BASE + AZX_REG_ML_LCTL);
522 	/* wait for CPA */
523 	timeout = 50;
524 	while (timeout) {
525 		if (((readl(bus->mlcap + AZX_ML_BASE + AZX_REG_ML_LCTL)) &
526 		    AZX_MLCTL_CPA) == (state << AZX_MLCTL_CPA_SHIFT))
527 			return 0;
528 		timeout--;
529 		udelay(10);
530 	}
531 
532 	return -1;
533 }
534 
535 static void intel_init_lctl(struct azx *chip)
536 {
537 	struct hdac_bus *bus = azx_bus(chip);
538 	u32 val;
539 	int ret;
540 
541 	/* 0. check lctl register value is correct or not */
542 	val = readl(bus->mlcap + AZX_ML_BASE + AZX_REG_ML_LCTL);
543 	/* if SCF is already set, let's use it */
544 	if ((val & ML_LCTL_SCF_MASK) != 0)
545 		return;
546 
547 	/*
548 	 * Before operating on SPA, CPA must match SPA.
549 	 * Any deviation may result in undefined behavior.
550 	 */
551 	if (((val & AZX_MLCTL_SPA) >> AZX_MLCTL_SPA_SHIFT) !=
552 		((val & AZX_MLCTL_CPA) >> AZX_MLCTL_CPA_SHIFT))
553 		return;
554 
555 	/* 1. turn link down: set SPA to 0 and wait CPA to 0 */
556 	ret = intel_ml_lctl_set_power(chip, 0);
557 	udelay(100);
558 	if (ret)
559 		goto set_spa;
560 
561 	/* 2. update SCF to select a properly audio clock*/
562 	val &= ~ML_LCTL_SCF_MASK;
563 	val |= intel_get_lctl_scf(chip);
564 	writel(val, bus->mlcap + AZX_ML_BASE + AZX_REG_ML_LCTL);
565 
566 set_spa:
567 	/* 4. turn link up: set SPA to 1 and wait CPA to 1 */
568 	intel_ml_lctl_set_power(chip, 1);
569 	udelay(100);
570 }
571 
572 static void hda_intel_init_chip(struct azx *chip, bool full_reset)
573 {
574 	struct hdac_bus *bus = azx_bus(chip);
575 	struct pci_dev *pci = chip->pci;
576 	u32 val;
577 
578 	snd_hdac_set_codec_wakeup(bus, true);
579 	if (chip->driver_type == AZX_DRIVER_SKL) {
580 		pci_read_config_dword(pci, INTEL_HDA_CGCTL, &val);
581 		val = val & ~INTEL_HDA_CGCTL_MISCBDCGE;
582 		pci_write_config_dword(pci, INTEL_HDA_CGCTL, val);
583 	}
584 	azx_init_chip(chip, full_reset);
585 	if (chip->driver_type == AZX_DRIVER_SKL) {
586 		pci_read_config_dword(pci, INTEL_HDA_CGCTL, &val);
587 		val = val | INTEL_HDA_CGCTL_MISCBDCGE;
588 		pci_write_config_dword(pci, INTEL_HDA_CGCTL, val);
589 	}
590 
591 	snd_hdac_set_codec_wakeup(bus, false);
592 
593 	/* reduce dma latency to avoid noise */
594 	if (IS_BXT(pci))
595 		bxt_reduce_dma_latency(chip);
596 
597 	if (bus->mlcap != NULL)
598 		intel_init_lctl(chip);
599 }
600 
601 /* calculate runtime delay from LPIB */
602 static int azx_get_delay_from_lpib(struct azx *chip, struct azx_dev *azx_dev,
603 				   unsigned int pos)
604 {
605 	struct snd_pcm_substream *substream = azx_dev->core.substream;
606 	int stream = substream->stream;
607 	unsigned int lpib_pos = azx_get_pos_lpib(chip, azx_dev);
608 	int delay;
609 
610 	if (stream == SNDRV_PCM_STREAM_PLAYBACK)
611 		delay = pos - lpib_pos;
612 	else
613 		delay = lpib_pos - pos;
614 	if (delay < 0) {
615 		if (delay >= azx_dev->core.delay_negative_threshold)
616 			delay = 0;
617 		else
618 			delay += azx_dev->core.bufsize;
619 	}
620 
621 	if (delay >= azx_dev->core.period_bytes) {
622 		dev_info(chip->card->dev,
623 			 "Unstable LPIB (%d >= %d); disabling LPIB delay counting\n",
624 			 delay, azx_dev->core.period_bytes);
625 		delay = 0;
626 		chip->driver_caps &= ~AZX_DCAPS_COUNT_LPIB_DELAY;
627 		chip->get_delay[stream] = NULL;
628 	}
629 
630 	return bytes_to_frames(substream->runtime, delay);
631 }
632 
633 static int azx_position_ok(struct azx *chip, struct azx_dev *azx_dev);
634 
635 /* called from IRQ */
636 static int azx_position_check(struct azx *chip, struct azx_dev *azx_dev)
637 {
638 	struct hda_intel *hda = container_of(chip, struct hda_intel, chip);
639 	int ok;
640 
641 	ok = azx_position_ok(chip, azx_dev);
642 	if (ok == 1) {
643 		azx_dev->irq_pending = 0;
644 		return ok;
645 	} else if (ok == 0) {
646 		/* bogus IRQ, process it later */
647 		azx_dev->irq_pending = 1;
648 		schedule_work(&hda->irq_pending_work);
649 	}
650 	return 0;
651 }
652 
653 #define display_power(chip, enable) \
654 	snd_hdac_display_power(azx_bus(chip), HDA_CODEC_IDX_CONTROLLER, enable)
655 
656 /*
657  * Check whether the current DMA position is acceptable for updating
658  * periods.  Returns non-zero if it's OK.
659  *
660  * Many HD-audio controllers appear pretty inaccurate about
661  * the update-IRQ timing.  The IRQ is issued before actually the
662  * data is processed.  So, we need to process it afterwords in a
663  * workqueue.
664  */
665 static int azx_position_ok(struct azx *chip, struct azx_dev *azx_dev)
666 {
667 	struct snd_pcm_substream *substream = azx_dev->core.substream;
668 	int stream = substream->stream;
669 	u32 wallclk;
670 	unsigned int pos;
671 
672 	wallclk = azx_readl(chip, WALLCLK) - azx_dev->core.start_wallclk;
673 	if (wallclk < (azx_dev->core.period_wallclk * 2) / 3)
674 		return -1;	/* bogus (too early) interrupt */
675 
676 	if (chip->get_position[stream])
677 		pos = chip->get_position[stream](chip, azx_dev);
678 	else { /* use the position buffer as default */
679 		pos = azx_get_pos_posbuf(chip, azx_dev);
680 		if (!pos || pos == (u32)-1) {
681 			dev_info(chip->card->dev,
682 				 "Invalid position buffer, using LPIB read method instead.\n");
683 			chip->get_position[stream] = azx_get_pos_lpib;
684 			if (chip->get_position[0] == azx_get_pos_lpib &&
685 			    chip->get_position[1] == azx_get_pos_lpib)
686 				azx_bus(chip)->use_posbuf = false;
687 			pos = azx_get_pos_lpib(chip, azx_dev);
688 			chip->get_delay[stream] = NULL;
689 		} else {
690 			chip->get_position[stream] = azx_get_pos_posbuf;
691 			if (chip->driver_caps & AZX_DCAPS_COUNT_LPIB_DELAY)
692 				chip->get_delay[stream] = azx_get_delay_from_lpib;
693 		}
694 	}
695 
696 	if (pos >= azx_dev->core.bufsize)
697 		pos = 0;
698 
699 	if (WARN_ONCE(!azx_dev->core.period_bytes,
700 		      "hda-intel: zero azx_dev->period_bytes"))
701 		return -1; /* this shouldn't happen! */
702 	if (wallclk < (azx_dev->core.period_wallclk * 5) / 4 &&
703 	    pos % azx_dev->core.period_bytes > azx_dev->core.period_bytes / 2)
704 		/* NG - it's below the first next period boundary */
705 		return chip->bdl_pos_adj ? 0 : -1;
706 	azx_dev->core.start_wallclk += wallclk;
707 	return 1; /* OK, it's fine */
708 }
709 
710 /*
711  * The work for pending PCM period updates.
712  */
713 static void azx_irq_pending_work(struct work_struct *work)
714 {
715 	struct hda_intel *hda = container_of(work, struct hda_intel, irq_pending_work);
716 	struct azx *chip = &hda->chip;
717 	struct hdac_bus *bus = azx_bus(chip);
718 	struct hdac_stream *s;
719 	int pending, ok;
720 
721 	if (!hda->irq_pending_warned) {
722 		dev_info(chip->card->dev,
723 			 "IRQ timing workaround is activated for card #%d. Suggest a bigger bdl_pos_adj.\n",
724 			 chip->card->number);
725 		hda->irq_pending_warned = 1;
726 	}
727 
728 	for (;;) {
729 		pending = 0;
730 		spin_lock_irq(&bus->reg_lock);
731 		list_for_each_entry(s, &bus->stream_list, list) {
732 			struct azx_dev *azx_dev = stream_to_azx_dev(s);
733 			if (!azx_dev->irq_pending ||
734 			    !s->substream ||
735 			    !s->running)
736 				continue;
737 			ok = azx_position_ok(chip, azx_dev);
738 			if (ok > 0) {
739 				azx_dev->irq_pending = 0;
740 				spin_unlock(&bus->reg_lock);
741 				snd_pcm_period_elapsed(s->substream);
742 				spin_lock(&bus->reg_lock);
743 			} else if (ok < 0) {
744 				pending = 0;	/* too early */
745 			} else
746 				pending++;
747 		}
748 		spin_unlock_irq(&bus->reg_lock);
749 		if (!pending)
750 			return;
751 		msleep(1);
752 	}
753 }
754 
755 /* clear irq_pending flags and assure no on-going workq */
756 static void azx_clear_irq_pending(struct azx *chip)
757 {
758 	struct hdac_bus *bus = azx_bus(chip);
759 	struct hdac_stream *s;
760 
761 	spin_lock_irq(&bus->reg_lock);
762 	list_for_each_entry(s, &bus->stream_list, list) {
763 		struct azx_dev *azx_dev = stream_to_azx_dev(s);
764 		azx_dev->irq_pending = 0;
765 	}
766 	spin_unlock_irq(&bus->reg_lock);
767 }
768 
769 static int azx_acquire_irq(struct azx *chip, int do_disconnect)
770 {
771 	struct hdac_bus *bus = azx_bus(chip);
772 
773 	if (request_irq(chip->pci->irq, azx_interrupt,
774 			chip->msi ? 0 : IRQF_SHARED,
775 			chip->card->irq_descr, chip)) {
776 		dev_err(chip->card->dev,
777 			"unable to grab IRQ %d, disabling device\n",
778 			chip->pci->irq);
779 		if (do_disconnect)
780 			snd_card_disconnect(chip->card);
781 		return -1;
782 	}
783 	bus->irq = chip->pci->irq;
784 	pci_intx(chip->pci, !chip->msi);
785 	return 0;
786 }
787 
788 /* get the current DMA position with correction on VIA chips */
789 static unsigned int azx_via_get_position(struct azx *chip,
790 					 struct azx_dev *azx_dev)
791 {
792 	unsigned int link_pos, mini_pos, bound_pos;
793 	unsigned int mod_link_pos, mod_dma_pos, mod_mini_pos;
794 	unsigned int fifo_size;
795 
796 	link_pos = snd_hdac_stream_get_pos_lpib(azx_stream(azx_dev));
797 	if (azx_dev->core.substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
798 		/* Playback, no problem using link position */
799 		return link_pos;
800 	}
801 
802 	/* Capture */
803 	/* For new chipset,
804 	 * use mod to get the DMA position just like old chipset
805 	 */
806 	mod_dma_pos = le32_to_cpu(*azx_dev->core.posbuf);
807 	mod_dma_pos %= azx_dev->core.period_bytes;
808 
809 	/* azx_dev->fifo_size can't get FIFO size of in stream.
810 	 * Get from base address + offset.
811 	 */
812 	fifo_size = readw(azx_bus(chip)->remap_addr +
813 			  VIA_IN_STREAM0_FIFO_SIZE_OFFSET);
814 
815 	if (azx_dev->insufficient) {
816 		/* Link position never gather than FIFO size */
817 		if (link_pos <= fifo_size)
818 			return 0;
819 
820 		azx_dev->insufficient = 0;
821 	}
822 
823 	if (link_pos <= fifo_size)
824 		mini_pos = azx_dev->core.bufsize + link_pos - fifo_size;
825 	else
826 		mini_pos = link_pos - fifo_size;
827 
828 	/* Find nearest previous boudary */
829 	mod_mini_pos = mini_pos % azx_dev->core.period_bytes;
830 	mod_link_pos = link_pos % azx_dev->core.period_bytes;
831 	if (mod_link_pos >= fifo_size)
832 		bound_pos = link_pos - mod_link_pos;
833 	else if (mod_dma_pos >= mod_mini_pos)
834 		bound_pos = mini_pos - mod_mini_pos;
835 	else {
836 		bound_pos = mini_pos - mod_mini_pos + azx_dev->core.period_bytes;
837 		if (bound_pos >= azx_dev->core.bufsize)
838 			bound_pos = 0;
839 	}
840 
841 	/* Calculate real DMA position we want */
842 	return bound_pos + mod_dma_pos;
843 }
844 
845 static unsigned int azx_skl_get_dpib_pos(struct azx *chip,
846 					 struct azx_dev *azx_dev)
847 {
848 	return _snd_hdac_chip_readl(azx_bus(chip),
849 				    AZX_REG_VS_SDXDPIB_XBASE +
850 				    (AZX_REG_VS_SDXDPIB_XINTERVAL *
851 				     azx_dev->core.index));
852 }
853 
854 /* get the current DMA position with correction on SKL+ chips */
855 static unsigned int azx_get_pos_skl(struct azx *chip, struct azx_dev *azx_dev)
856 {
857 	/* DPIB register gives a more accurate position for playback */
858 	if (azx_dev->core.substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
859 		return azx_skl_get_dpib_pos(chip, azx_dev);
860 
861 	/* For capture, we need to read posbuf, but it requires a delay
862 	 * for the possible boundary overlap; the read of DPIB fetches the
863 	 * actual posbuf
864 	 */
865 	udelay(20);
866 	azx_skl_get_dpib_pos(chip, azx_dev);
867 	return azx_get_pos_posbuf(chip, azx_dev);
868 }
869 
870 #ifdef CONFIG_PM
871 static DEFINE_MUTEX(card_list_lock);
872 static LIST_HEAD(card_list);
873 
874 static void azx_add_card_list(struct azx *chip)
875 {
876 	struct hda_intel *hda = container_of(chip, struct hda_intel, chip);
877 	mutex_lock(&card_list_lock);
878 	list_add(&hda->list, &card_list);
879 	mutex_unlock(&card_list_lock);
880 }
881 
882 static void azx_del_card_list(struct azx *chip)
883 {
884 	struct hda_intel *hda = container_of(chip, struct hda_intel, chip);
885 	mutex_lock(&card_list_lock);
886 	list_del_init(&hda->list);
887 	mutex_unlock(&card_list_lock);
888 }
889 
890 /* trigger power-save check at writing parameter */
891 static int param_set_xint(const char *val, const struct kernel_param *kp)
892 {
893 	struct hda_intel *hda;
894 	struct azx *chip;
895 	int prev = power_save;
896 	int ret = param_set_int(val, kp);
897 
898 	if (ret || prev == power_save)
899 		return ret;
900 
901 	mutex_lock(&card_list_lock);
902 	list_for_each_entry(hda, &card_list, list) {
903 		chip = &hda->chip;
904 		if (!hda->probe_continued || chip->disabled)
905 			continue;
906 		snd_hda_set_power_save(&chip->bus, power_save * 1000);
907 	}
908 	mutex_unlock(&card_list_lock);
909 	return 0;
910 }
911 
912 /*
913  * power management
914  */
915 static bool azx_is_pm_ready(struct snd_card *card)
916 {
917 	struct azx *chip;
918 	struct hda_intel *hda;
919 
920 	if (!card)
921 		return false;
922 	chip = card->private_data;
923 	hda = container_of(chip, struct hda_intel, chip);
924 	if (chip->disabled || hda->init_failed || !chip->running)
925 		return false;
926 	return true;
927 }
928 
929 static void __azx_runtime_suspend(struct azx *chip)
930 {
931 	azx_stop_chip(chip);
932 	azx_enter_link_reset(chip);
933 	azx_clear_irq_pending(chip);
934 	display_power(chip, false);
935 }
936 
937 static void __azx_runtime_resume(struct azx *chip, bool from_rt)
938 {
939 	struct hda_intel *hda = container_of(chip, struct hda_intel, chip);
940 	struct hdac_bus *bus = azx_bus(chip);
941 	struct hda_codec *codec;
942 	int status;
943 
944 	display_power(chip, true);
945 	if (hda->need_i915_power)
946 		snd_hdac_i915_set_bclk(bus);
947 
948 	/* Read STATESTS before controller reset */
949 	status = azx_readw(chip, STATESTS);
950 
951 	azx_init_pci(chip);
952 	hda_intel_init_chip(chip, true);
953 
954 	if (status && from_rt) {
955 		list_for_each_codec(codec, &chip->bus)
956 			if (status & (1 << codec->addr))
957 				schedule_delayed_work(&codec->jackpoll_work,
958 						      codec->jackpoll_interval);
959 	}
960 
961 	/* power down again for link-controlled chips */
962 	if (!hda->need_i915_power)
963 		display_power(chip, false);
964 }
965 
966 #ifdef CONFIG_PM_SLEEP
967 static int azx_suspend(struct device *dev)
968 {
969 	struct snd_card *card = dev_get_drvdata(dev);
970 	struct azx *chip;
971 	struct hdac_bus *bus;
972 
973 	if (!azx_is_pm_ready(card))
974 		return 0;
975 
976 	chip = card->private_data;
977 	bus = azx_bus(chip);
978 	snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
979 	__azx_runtime_suspend(chip);
980 	if (bus->irq >= 0) {
981 		free_irq(bus->irq, chip);
982 		bus->irq = -1;
983 	}
984 
985 	if (chip->msi)
986 		pci_disable_msi(chip->pci);
987 
988 	trace_azx_suspend(chip);
989 	return 0;
990 }
991 
992 static int azx_resume(struct device *dev)
993 {
994 	struct snd_card *card = dev_get_drvdata(dev);
995 	struct azx *chip;
996 
997 	if (!azx_is_pm_ready(card))
998 		return 0;
999 
1000 	chip = card->private_data;
1001 	if (chip->msi)
1002 		if (pci_enable_msi(chip->pci) < 0)
1003 			chip->msi = 0;
1004 	if (azx_acquire_irq(chip, 1) < 0)
1005 		return -EIO;
1006 	__azx_runtime_resume(chip, false);
1007 	snd_power_change_state(card, SNDRV_CTL_POWER_D0);
1008 
1009 	trace_azx_resume(chip);
1010 	return 0;
1011 }
1012 
1013 /* put codec down to D3 at hibernation for Intel SKL+;
1014  * otherwise BIOS may still access the codec and screw up the driver
1015  */
1016 static int azx_freeze_noirq(struct device *dev)
1017 {
1018 	struct snd_card *card = dev_get_drvdata(dev);
1019 	struct azx *chip = card->private_data;
1020 	struct pci_dev *pci = to_pci_dev(dev);
1021 
1022 	if (chip->driver_type == AZX_DRIVER_SKL)
1023 		pci_set_power_state(pci, PCI_D3hot);
1024 
1025 	return 0;
1026 }
1027 
1028 static int azx_thaw_noirq(struct device *dev)
1029 {
1030 	struct snd_card *card = dev_get_drvdata(dev);
1031 	struct azx *chip = card->private_data;
1032 	struct pci_dev *pci = to_pci_dev(dev);
1033 
1034 	if (chip->driver_type == AZX_DRIVER_SKL)
1035 		pci_set_power_state(pci, PCI_D0);
1036 
1037 	return 0;
1038 }
1039 #endif /* CONFIG_PM_SLEEP */
1040 
1041 static int azx_runtime_suspend(struct device *dev)
1042 {
1043 	struct snd_card *card = dev_get_drvdata(dev);
1044 	struct azx *chip;
1045 
1046 	if (!azx_is_pm_ready(card))
1047 		return 0;
1048 	chip = card->private_data;
1049 	if (!azx_has_pm_runtime(chip))
1050 		return 0;
1051 
1052 	/* enable controller wake up event */
1053 	azx_writew(chip, WAKEEN, azx_readw(chip, WAKEEN) |
1054 		  STATESTS_INT_MASK);
1055 
1056 	__azx_runtime_suspend(chip);
1057 	trace_azx_runtime_suspend(chip);
1058 	return 0;
1059 }
1060 
1061 static int azx_runtime_resume(struct device *dev)
1062 {
1063 	struct snd_card *card = dev_get_drvdata(dev);
1064 	struct azx *chip;
1065 
1066 	if (!azx_is_pm_ready(card))
1067 		return 0;
1068 	chip = card->private_data;
1069 	if (!azx_has_pm_runtime(chip))
1070 		return 0;
1071 	__azx_runtime_resume(chip, true);
1072 
1073 	/* disable controller Wake Up event*/
1074 	azx_writew(chip, WAKEEN, azx_readw(chip, WAKEEN) &
1075 			~STATESTS_INT_MASK);
1076 
1077 	trace_azx_runtime_resume(chip);
1078 	return 0;
1079 }
1080 
1081 static int azx_runtime_idle(struct device *dev)
1082 {
1083 	struct snd_card *card = dev_get_drvdata(dev);
1084 	struct azx *chip;
1085 	struct hda_intel *hda;
1086 
1087 	if (!card)
1088 		return 0;
1089 
1090 	chip = card->private_data;
1091 	hda = container_of(chip, struct hda_intel, chip);
1092 	if (chip->disabled || hda->init_failed)
1093 		return 0;
1094 
1095 	if (!power_save_controller || !azx_has_pm_runtime(chip) ||
1096 	    azx_bus(chip)->codec_powered || !chip->running)
1097 		return -EBUSY;
1098 
1099 	/* ELD notification gets broken when HD-audio bus is off */
1100 	if (needs_eld_notify_link(hda))
1101 		return -EBUSY;
1102 
1103 	return 0;
1104 }
1105 
1106 static const struct dev_pm_ops azx_pm = {
1107 	SET_SYSTEM_SLEEP_PM_OPS(azx_suspend, azx_resume)
1108 #ifdef CONFIG_PM_SLEEP
1109 	.freeze_noirq = azx_freeze_noirq,
1110 	.thaw_noirq = azx_thaw_noirq,
1111 #endif
1112 	SET_RUNTIME_PM_OPS(azx_runtime_suspend, azx_runtime_resume, azx_runtime_idle)
1113 };
1114 
1115 #define AZX_PM_OPS	&azx_pm
1116 #else
1117 #define azx_add_card_list(chip) /* NOP */
1118 #define azx_del_card_list(chip) /* NOP */
1119 #define AZX_PM_OPS	NULL
1120 #endif /* CONFIG_PM */
1121 
1122 
1123 static int azx_probe_continue(struct azx *chip);
1124 
1125 #ifdef SUPPORT_VGA_SWITCHEROO
1126 static struct pci_dev *get_bound_vga(struct pci_dev *pci);
1127 
1128 static void azx_vs_set_state(struct pci_dev *pci,
1129 			     enum vga_switcheroo_state state)
1130 {
1131 	struct snd_card *card = pci_get_drvdata(pci);
1132 	struct azx *chip = card->private_data;
1133 	struct hda_intel *hda = container_of(chip, struct hda_intel, chip);
1134 	struct hda_codec *codec;
1135 	bool disabled;
1136 
1137 	wait_for_completion(&hda->probe_wait);
1138 	if (hda->init_failed)
1139 		return;
1140 
1141 	disabled = (state == VGA_SWITCHEROO_OFF);
1142 	if (chip->disabled == disabled)
1143 		return;
1144 
1145 	if (!hda->probe_continued) {
1146 		chip->disabled = disabled;
1147 		if (!disabled) {
1148 			dev_info(chip->card->dev,
1149 				 "Start delayed initialization\n");
1150 			if (azx_probe_continue(chip) < 0) {
1151 				dev_err(chip->card->dev, "initialization error\n");
1152 				hda->init_failed = true;
1153 			}
1154 		}
1155 	} else {
1156 		dev_info(chip->card->dev, "%s via vga_switcheroo\n",
1157 			 disabled ? "Disabling" : "Enabling");
1158 		if (disabled) {
1159 			list_for_each_codec(codec, &chip->bus) {
1160 				pm_runtime_suspend(hda_codec_dev(codec));
1161 				pm_runtime_disable(hda_codec_dev(codec));
1162 			}
1163 			pm_runtime_suspend(card->dev);
1164 			pm_runtime_disable(card->dev);
1165 			/* when we get suspended by vga_switcheroo we end up in D3cold,
1166 			 * however we have no ACPI handle, so pci/acpi can't put us there,
1167 			 * put ourselves there */
1168 			pci->current_state = PCI_D3cold;
1169 			chip->disabled = true;
1170 			if (snd_hda_lock_devices(&chip->bus))
1171 				dev_warn(chip->card->dev,
1172 					 "Cannot lock devices!\n");
1173 		} else {
1174 			snd_hda_unlock_devices(&chip->bus);
1175 			chip->disabled = false;
1176 			pm_runtime_enable(card->dev);
1177 			list_for_each_codec(codec, &chip->bus) {
1178 				pm_runtime_enable(hda_codec_dev(codec));
1179 				pm_runtime_resume(hda_codec_dev(codec));
1180 			}
1181 		}
1182 	}
1183 }
1184 
1185 static bool azx_vs_can_switch(struct pci_dev *pci)
1186 {
1187 	struct snd_card *card = pci_get_drvdata(pci);
1188 	struct azx *chip = card->private_data;
1189 	struct hda_intel *hda = container_of(chip, struct hda_intel, chip);
1190 
1191 	wait_for_completion(&hda->probe_wait);
1192 	if (hda->init_failed)
1193 		return false;
1194 	if (chip->disabled || !hda->probe_continued)
1195 		return true;
1196 	if (snd_hda_lock_devices(&chip->bus))
1197 		return false;
1198 	snd_hda_unlock_devices(&chip->bus);
1199 	return true;
1200 }
1201 
1202 /*
1203  * The discrete GPU cannot power down unless the HDA controller runtime
1204  * suspends, so activate runtime PM on codecs even if power_save == 0.
1205  */
1206 static void setup_vga_switcheroo_runtime_pm(struct azx *chip)
1207 {
1208 	struct hda_intel *hda = container_of(chip, struct hda_intel, chip);
1209 	struct hda_codec *codec;
1210 
1211 	if (hda->use_vga_switcheroo && !hda->need_eld_notify_link) {
1212 		list_for_each_codec(codec, &chip->bus)
1213 			codec->auto_runtime_pm = 1;
1214 		/* reset the power save setup */
1215 		if (chip->running)
1216 			set_default_power_save(chip);
1217 	}
1218 }
1219 
1220 static void azx_vs_gpu_bound(struct pci_dev *pci,
1221 			     enum vga_switcheroo_client_id client_id)
1222 {
1223 	struct snd_card *card = pci_get_drvdata(pci);
1224 	struct azx *chip = card->private_data;
1225 	struct hda_intel *hda = container_of(chip, struct hda_intel, chip);
1226 
1227 	if (client_id == VGA_SWITCHEROO_DIS)
1228 		hda->need_eld_notify_link = 0;
1229 	setup_vga_switcheroo_runtime_pm(chip);
1230 }
1231 
1232 static void init_vga_switcheroo(struct azx *chip)
1233 {
1234 	struct hda_intel *hda = container_of(chip, struct hda_intel, chip);
1235 	struct pci_dev *p = get_bound_vga(chip->pci);
1236 	if (p) {
1237 		dev_info(chip->card->dev,
1238 			 "Handle vga_switcheroo audio client\n");
1239 		hda->use_vga_switcheroo = 1;
1240 		hda->need_eld_notify_link = 1; /* cleared in gpu_bound op */
1241 		chip->driver_caps |= AZX_DCAPS_PM_RUNTIME;
1242 		pci_dev_put(p);
1243 	}
1244 }
1245 
1246 static const struct vga_switcheroo_client_ops azx_vs_ops = {
1247 	.set_gpu_state = azx_vs_set_state,
1248 	.can_switch = azx_vs_can_switch,
1249 	.gpu_bound = azx_vs_gpu_bound,
1250 };
1251 
1252 static int register_vga_switcheroo(struct azx *chip)
1253 {
1254 	struct hda_intel *hda = container_of(chip, struct hda_intel, chip);
1255 	struct pci_dev *p;
1256 	int err;
1257 
1258 	if (!hda->use_vga_switcheroo)
1259 		return 0;
1260 
1261 	p = get_bound_vga(chip->pci);
1262 	err = vga_switcheroo_register_audio_client(chip->pci, &azx_vs_ops, p);
1263 	pci_dev_put(p);
1264 
1265 	if (err < 0)
1266 		return err;
1267 	hda->vga_switcheroo_registered = 1;
1268 
1269 	return 0;
1270 }
1271 #else
1272 #define init_vga_switcheroo(chip)		/* NOP */
1273 #define register_vga_switcheroo(chip)		0
1274 #define check_hdmi_disabled(pci)	false
1275 #define setup_vga_switcheroo_runtime_pm(chip)	/* NOP */
1276 #endif /* SUPPORT_VGA_SWITCHER */
1277 
1278 /*
1279  * destructor
1280  */
1281 static int azx_free(struct azx *chip)
1282 {
1283 	struct pci_dev *pci = chip->pci;
1284 	struct hda_intel *hda = container_of(chip, struct hda_intel, chip);
1285 	struct hdac_bus *bus = azx_bus(chip);
1286 
1287 	if (azx_has_pm_runtime(chip) && chip->running)
1288 		pm_runtime_get_noresume(&pci->dev);
1289 	chip->running = 0;
1290 
1291 	azx_del_card_list(chip);
1292 
1293 	hda->init_failed = 1; /* to be sure */
1294 	complete_all(&hda->probe_wait);
1295 
1296 	if (use_vga_switcheroo(hda)) {
1297 		if (chip->disabled && hda->probe_continued)
1298 			snd_hda_unlock_devices(&chip->bus);
1299 		if (hda->vga_switcheroo_registered)
1300 			vga_switcheroo_unregister_client(chip->pci);
1301 	}
1302 
1303 	if (bus->chip_init) {
1304 		azx_clear_irq_pending(chip);
1305 		azx_stop_all_streams(chip);
1306 		azx_stop_chip(chip);
1307 	}
1308 
1309 	if (bus->irq >= 0)
1310 		free_irq(bus->irq, (void*)chip);
1311 	if (chip->msi)
1312 		pci_disable_msi(chip->pci);
1313 	iounmap(bus->remap_addr);
1314 
1315 	azx_free_stream_pages(chip);
1316 	azx_free_streams(chip);
1317 	snd_hdac_bus_exit(bus);
1318 
1319 	if (chip->region_requested)
1320 		pci_release_regions(chip->pci);
1321 
1322 	pci_disable_device(chip->pci);
1323 #ifdef CONFIG_SND_HDA_PATCH_LOADER
1324 	release_firmware(chip->fw);
1325 #endif
1326 	display_power(chip, false);
1327 
1328 	if (chip->driver_caps & AZX_DCAPS_I915_COMPONENT)
1329 		snd_hdac_i915_exit(bus);
1330 	kfree(hda);
1331 
1332 	return 0;
1333 }
1334 
1335 static int azx_dev_disconnect(struct snd_device *device)
1336 {
1337 	struct azx *chip = device->device_data;
1338 
1339 	chip->bus.shutdown = 1;
1340 	return 0;
1341 }
1342 
1343 static int azx_dev_free(struct snd_device *device)
1344 {
1345 	return azx_free(device->device_data);
1346 }
1347 
1348 #ifdef SUPPORT_VGA_SWITCHEROO
1349 /*
1350  * Check of disabled HDMI controller by vga_switcheroo
1351  */
1352 static struct pci_dev *get_bound_vga(struct pci_dev *pci)
1353 {
1354 	struct pci_dev *p;
1355 
1356 	/* check only discrete GPU */
1357 	switch (pci->vendor) {
1358 	case PCI_VENDOR_ID_ATI:
1359 	case PCI_VENDOR_ID_AMD:
1360 	case PCI_VENDOR_ID_NVIDIA:
1361 		if (pci->devfn == 1) {
1362 			p = pci_get_domain_bus_and_slot(pci_domain_nr(pci->bus),
1363 							pci->bus->number, 0);
1364 			if (p) {
1365 				if ((p->class >> 16) == PCI_BASE_CLASS_DISPLAY)
1366 					return p;
1367 				pci_dev_put(p);
1368 			}
1369 		}
1370 		break;
1371 	}
1372 	return NULL;
1373 }
1374 
1375 static bool check_hdmi_disabled(struct pci_dev *pci)
1376 {
1377 	bool vga_inactive = false;
1378 	struct pci_dev *p = get_bound_vga(pci);
1379 
1380 	if (p) {
1381 		if (vga_switcheroo_get_client_state(p) == VGA_SWITCHEROO_OFF)
1382 			vga_inactive = true;
1383 		pci_dev_put(p);
1384 	}
1385 	return vga_inactive;
1386 }
1387 #endif /* SUPPORT_VGA_SWITCHEROO */
1388 
1389 /*
1390  * white/black-listing for position_fix
1391  */
1392 static struct snd_pci_quirk position_fix_list[] = {
1393 	SND_PCI_QUIRK(0x1028, 0x01cc, "Dell D820", POS_FIX_LPIB),
1394 	SND_PCI_QUIRK(0x1028, 0x01de, "Dell Precision 390", POS_FIX_LPIB),
1395 	SND_PCI_QUIRK(0x103c, 0x306d, "HP dv3", POS_FIX_LPIB),
1396 	SND_PCI_QUIRK(0x1043, 0x813d, "ASUS P5AD2", POS_FIX_LPIB),
1397 	SND_PCI_QUIRK(0x1043, 0x81b3, "ASUS", POS_FIX_LPIB),
1398 	SND_PCI_QUIRK(0x1043, 0x81e7, "ASUS M2V", POS_FIX_LPIB),
1399 	SND_PCI_QUIRK(0x104d, 0x9069, "Sony VPCS11V9E", POS_FIX_LPIB),
1400 	SND_PCI_QUIRK(0x10de, 0xcb89, "Macbook Pro 7,1", POS_FIX_LPIB),
1401 	SND_PCI_QUIRK(0x1297, 0x3166, "Shuttle", POS_FIX_LPIB),
1402 	SND_PCI_QUIRK(0x1458, 0xa022, "ga-ma770-ud3", POS_FIX_LPIB),
1403 	SND_PCI_QUIRK(0x1462, 0x1002, "MSI Wind U115", POS_FIX_LPIB),
1404 	SND_PCI_QUIRK(0x1565, 0x8218, "Biostar Microtech", POS_FIX_LPIB),
1405 	SND_PCI_QUIRK(0x1849, 0x0888, "775Dual-VSTA", POS_FIX_LPIB),
1406 	SND_PCI_QUIRK(0x8086, 0x2503, "DG965OT AAD63733-203", POS_FIX_LPIB),
1407 	{}
1408 };
1409 
1410 static int check_position_fix(struct azx *chip, int fix)
1411 {
1412 	const struct snd_pci_quirk *q;
1413 
1414 	switch (fix) {
1415 	case POS_FIX_AUTO:
1416 	case POS_FIX_LPIB:
1417 	case POS_FIX_POSBUF:
1418 	case POS_FIX_VIACOMBO:
1419 	case POS_FIX_COMBO:
1420 	case POS_FIX_SKL:
1421 		return fix;
1422 	}
1423 
1424 	q = snd_pci_quirk_lookup(chip->pci, position_fix_list);
1425 	if (q) {
1426 		dev_info(chip->card->dev,
1427 			 "position_fix set to %d for device %04x:%04x\n",
1428 			 q->value, q->subvendor, q->subdevice);
1429 		return q->value;
1430 	}
1431 
1432 	/* Check VIA/ATI HD Audio Controller exist */
1433 	if (chip->driver_type == AZX_DRIVER_VIA) {
1434 		dev_dbg(chip->card->dev, "Using VIACOMBO position fix\n");
1435 		return POS_FIX_VIACOMBO;
1436 	}
1437 	if (chip->driver_caps & AZX_DCAPS_POSFIX_LPIB) {
1438 		dev_dbg(chip->card->dev, "Using LPIB position fix\n");
1439 		return POS_FIX_LPIB;
1440 	}
1441 	if (chip->driver_type == AZX_DRIVER_SKL) {
1442 		dev_dbg(chip->card->dev, "Using SKL position fix\n");
1443 		return POS_FIX_SKL;
1444 	}
1445 	return POS_FIX_AUTO;
1446 }
1447 
1448 static void assign_position_fix(struct azx *chip, int fix)
1449 {
1450 	static azx_get_pos_callback_t callbacks[] = {
1451 		[POS_FIX_AUTO] = NULL,
1452 		[POS_FIX_LPIB] = azx_get_pos_lpib,
1453 		[POS_FIX_POSBUF] = azx_get_pos_posbuf,
1454 		[POS_FIX_VIACOMBO] = azx_via_get_position,
1455 		[POS_FIX_COMBO] = azx_get_pos_lpib,
1456 		[POS_FIX_SKL] = azx_get_pos_skl,
1457 	};
1458 
1459 	chip->get_position[0] = chip->get_position[1] = callbacks[fix];
1460 
1461 	/* combo mode uses LPIB only for playback */
1462 	if (fix == POS_FIX_COMBO)
1463 		chip->get_position[1] = NULL;
1464 
1465 	if ((fix == POS_FIX_POSBUF || fix == POS_FIX_SKL) &&
1466 	    (chip->driver_caps & AZX_DCAPS_COUNT_LPIB_DELAY)) {
1467 		chip->get_delay[0] = chip->get_delay[1] =
1468 			azx_get_delay_from_lpib;
1469 	}
1470 
1471 }
1472 
1473 /*
1474  * black-lists for probe_mask
1475  */
1476 static struct snd_pci_quirk probe_mask_list[] = {
1477 	/* Thinkpad often breaks the controller communication when accessing
1478 	 * to the non-working (or non-existing) modem codec slot.
1479 	 */
1480 	SND_PCI_QUIRK(0x1014, 0x05b7, "Thinkpad Z60", 0x01),
1481 	SND_PCI_QUIRK(0x17aa, 0x2010, "Thinkpad X/T/R60", 0x01),
1482 	SND_PCI_QUIRK(0x17aa, 0x20ac, "Thinkpad X/T/R61", 0x01),
1483 	/* broken BIOS */
1484 	SND_PCI_QUIRK(0x1028, 0x20ac, "Dell Studio Desktop", 0x01),
1485 	/* including bogus ALC268 in slot#2 that conflicts with ALC888 */
1486 	SND_PCI_QUIRK(0x17c0, 0x4085, "Medion MD96630", 0x01),
1487 	/* forced codec slots */
1488 	SND_PCI_QUIRK(0x1043, 0x1262, "ASUS W5Fm", 0x103),
1489 	SND_PCI_QUIRK(0x1046, 0x1262, "ASUS W5F", 0x103),
1490 	/* WinFast VP200 H (Teradici) user reported broken communication */
1491 	SND_PCI_QUIRK(0x3a21, 0x040d, "WinFast VP200 H", 0x101),
1492 	{}
1493 };
1494 
1495 #define AZX_FORCE_CODEC_MASK	0x100
1496 
1497 static void check_probe_mask(struct azx *chip, int dev)
1498 {
1499 	const struct snd_pci_quirk *q;
1500 
1501 	chip->codec_probe_mask = probe_mask[dev];
1502 	if (chip->codec_probe_mask == -1) {
1503 		q = snd_pci_quirk_lookup(chip->pci, probe_mask_list);
1504 		if (q) {
1505 			dev_info(chip->card->dev,
1506 				 "probe_mask set to 0x%x for device %04x:%04x\n",
1507 				 q->value, q->subvendor, q->subdevice);
1508 			chip->codec_probe_mask = q->value;
1509 		}
1510 	}
1511 
1512 	/* check forced option */
1513 	if (chip->codec_probe_mask != -1 &&
1514 	    (chip->codec_probe_mask & AZX_FORCE_CODEC_MASK)) {
1515 		azx_bus(chip)->codec_mask = chip->codec_probe_mask & 0xff;
1516 		dev_info(chip->card->dev, "codec_mask forced to 0x%x\n",
1517 			 (int)azx_bus(chip)->codec_mask);
1518 	}
1519 }
1520 
1521 /*
1522  * white/black-list for enable_msi
1523  */
1524 static struct snd_pci_quirk msi_black_list[] = {
1525 	SND_PCI_QUIRK(0x103c, 0x2191, "HP", 0), /* AMD Hudson */
1526 	SND_PCI_QUIRK(0x103c, 0x2192, "HP", 0), /* AMD Hudson */
1527 	SND_PCI_QUIRK(0x103c, 0x21f7, "HP", 0), /* AMD Hudson */
1528 	SND_PCI_QUIRK(0x103c, 0x21fa, "HP", 0), /* AMD Hudson */
1529 	SND_PCI_QUIRK(0x1043, 0x81f2, "ASUS", 0), /* Athlon64 X2 + nvidia */
1530 	SND_PCI_QUIRK(0x1043, 0x81f6, "ASUS", 0), /* nvidia */
1531 	SND_PCI_QUIRK(0x1043, 0x822d, "ASUS", 0), /* Athlon64 X2 + nvidia MCP55 */
1532 	SND_PCI_QUIRK(0x1179, 0xfb44, "Toshiba Satellite C870", 0), /* AMD Hudson */
1533 	SND_PCI_QUIRK(0x1849, 0x0888, "ASRock", 0), /* Athlon64 X2 + nvidia */
1534 	SND_PCI_QUIRK(0xa0a0, 0x0575, "Aopen MZ915-M", 0), /* ICH6 */
1535 	{}
1536 };
1537 
1538 static void check_msi(struct azx *chip)
1539 {
1540 	const struct snd_pci_quirk *q;
1541 
1542 	if (enable_msi >= 0) {
1543 		chip->msi = !!enable_msi;
1544 		return;
1545 	}
1546 	chip->msi = 1;	/* enable MSI as default */
1547 	q = snd_pci_quirk_lookup(chip->pci, msi_black_list);
1548 	if (q) {
1549 		dev_info(chip->card->dev,
1550 			 "msi for device %04x:%04x set to %d\n",
1551 			 q->subvendor, q->subdevice, q->value);
1552 		chip->msi = q->value;
1553 		return;
1554 	}
1555 
1556 	/* NVidia chipsets seem to cause troubles with MSI */
1557 	if (chip->driver_caps & AZX_DCAPS_NO_MSI) {
1558 		dev_info(chip->card->dev, "Disabling MSI\n");
1559 		chip->msi = 0;
1560 	}
1561 }
1562 
1563 /* check the snoop mode availability */
1564 static void azx_check_snoop_available(struct azx *chip)
1565 {
1566 	int snoop = hda_snoop;
1567 
1568 	if (snoop >= 0) {
1569 		dev_info(chip->card->dev, "Force to %s mode by module option\n",
1570 			 snoop ? "snoop" : "non-snoop");
1571 		chip->snoop = snoop;
1572 		chip->uc_buffer = !snoop;
1573 		return;
1574 	}
1575 
1576 	snoop = true;
1577 	if (azx_get_snoop_type(chip) == AZX_SNOOP_TYPE_NONE &&
1578 	    chip->driver_type == AZX_DRIVER_VIA) {
1579 		/* force to non-snoop mode for a new VIA controller
1580 		 * when BIOS is set
1581 		 */
1582 		u8 val;
1583 		pci_read_config_byte(chip->pci, 0x42, &val);
1584 		if (!(val & 0x80) && (chip->pci->revision == 0x30 ||
1585 				      chip->pci->revision == 0x20))
1586 			snoop = false;
1587 	}
1588 
1589 	if (chip->driver_caps & AZX_DCAPS_SNOOP_OFF)
1590 		snoop = false;
1591 
1592 	chip->snoop = snoop;
1593 	if (!snoop) {
1594 		dev_info(chip->card->dev, "Force to non-snoop mode\n");
1595 		/* C-Media requires non-cached pages only for CORB/RIRB */
1596 		if (chip->driver_type != AZX_DRIVER_CMEDIA)
1597 			chip->uc_buffer = true;
1598 	}
1599 }
1600 
1601 static void azx_probe_work(struct work_struct *work)
1602 {
1603 	struct hda_intel *hda = container_of(work, struct hda_intel, probe_work);
1604 	azx_probe_continue(&hda->chip);
1605 }
1606 
1607 static int default_bdl_pos_adj(struct azx *chip)
1608 {
1609 	/* some exceptions: Atoms seem problematic with value 1 */
1610 	if (chip->pci->vendor == PCI_VENDOR_ID_INTEL) {
1611 		switch (chip->pci->device) {
1612 		case 0x0f04: /* Baytrail */
1613 		case 0x2284: /* Braswell */
1614 			return 32;
1615 		}
1616 	}
1617 
1618 	switch (chip->driver_type) {
1619 	case AZX_DRIVER_ICH:
1620 	case AZX_DRIVER_PCH:
1621 		return 1;
1622 	default:
1623 		return 32;
1624 	}
1625 }
1626 
1627 /*
1628  * constructor
1629  */
1630 static const struct hdac_io_ops pci_hda_io_ops;
1631 static const struct hda_controller_ops pci_hda_ops;
1632 
1633 static int azx_create(struct snd_card *card, struct pci_dev *pci,
1634 		      int dev, unsigned int driver_caps,
1635 		      struct azx **rchip)
1636 {
1637 	static struct snd_device_ops ops = {
1638 		.dev_disconnect = azx_dev_disconnect,
1639 		.dev_free = azx_dev_free,
1640 	};
1641 	struct hda_intel *hda;
1642 	struct azx *chip;
1643 	int err;
1644 
1645 	*rchip = NULL;
1646 
1647 	err = pci_enable_device(pci);
1648 	if (err < 0)
1649 		return err;
1650 
1651 	hda = kzalloc(sizeof(*hda), GFP_KERNEL);
1652 	if (!hda) {
1653 		pci_disable_device(pci);
1654 		return -ENOMEM;
1655 	}
1656 
1657 	chip = &hda->chip;
1658 	mutex_init(&chip->open_mutex);
1659 	chip->card = card;
1660 	chip->pci = pci;
1661 	chip->ops = &pci_hda_ops;
1662 	chip->driver_caps = driver_caps;
1663 	chip->driver_type = driver_caps & 0xff;
1664 	check_msi(chip);
1665 	chip->dev_index = dev;
1666 	if (jackpoll_ms[dev] >= 50 && jackpoll_ms[dev] <= 60000)
1667 		chip->jackpoll_interval = msecs_to_jiffies(jackpoll_ms[dev]);
1668 	INIT_LIST_HEAD(&chip->pcm_list);
1669 	INIT_WORK(&hda->irq_pending_work, azx_irq_pending_work);
1670 	INIT_LIST_HEAD(&hda->list);
1671 	init_vga_switcheroo(chip);
1672 	init_completion(&hda->probe_wait);
1673 
1674 	assign_position_fix(chip, check_position_fix(chip, position_fix[dev]));
1675 
1676 	check_probe_mask(chip, dev);
1677 
1678 	if (single_cmd < 0) /* allow fallback to single_cmd at errors */
1679 		chip->fallback_to_single_cmd = 1;
1680 	else /* explicitly set to single_cmd or not */
1681 		chip->single_cmd = single_cmd;
1682 
1683 	azx_check_snoop_available(chip);
1684 
1685 	if (bdl_pos_adj[dev] < 0)
1686 		chip->bdl_pos_adj = default_bdl_pos_adj(chip);
1687 	else
1688 		chip->bdl_pos_adj = bdl_pos_adj[dev];
1689 
1690 	/* Workaround for a communication error on CFL (bko#199007) and CNL */
1691 	if (IS_CFL(pci) || IS_CNL(pci))
1692 		chip->polling_mode = 1;
1693 
1694 	err = azx_bus_init(chip, model[dev], &pci_hda_io_ops);
1695 	if (err < 0) {
1696 		kfree(hda);
1697 		pci_disable_device(pci);
1698 		return err;
1699 	}
1700 
1701 	if (chip->driver_type == AZX_DRIVER_NVIDIA) {
1702 		dev_dbg(chip->card->dev, "Enable delay in RIRB handling\n");
1703 		chip->bus.needs_damn_long_delay = 1;
1704 	}
1705 
1706 	err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
1707 	if (err < 0) {
1708 		dev_err(card->dev, "Error creating device [card]!\n");
1709 		azx_free(chip);
1710 		return err;
1711 	}
1712 
1713 	/* continue probing in work context as may trigger request module */
1714 	INIT_WORK(&hda->probe_work, azx_probe_work);
1715 
1716 	*rchip = chip;
1717 
1718 	return 0;
1719 }
1720 
1721 static int azx_first_init(struct azx *chip)
1722 {
1723 	int dev = chip->dev_index;
1724 	struct pci_dev *pci = chip->pci;
1725 	struct snd_card *card = chip->card;
1726 	struct hdac_bus *bus = azx_bus(chip);
1727 	int err;
1728 	unsigned short gcap;
1729 	unsigned int dma_bits = 64;
1730 
1731 #if BITS_PER_LONG != 64
1732 	/* Fix up base address on ULI M5461 */
1733 	if (chip->driver_type == AZX_DRIVER_ULI) {
1734 		u16 tmp3;
1735 		pci_read_config_word(pci, 0x40, &tmp3);
1736 		pci_write_config_word(pci, 0x40, tmp3 | 0x10);
1737 		pci_write_config_dword(pci, PCI_BASE_ADDRESS_1, 0);
1738 	}
1739 #endif
1740 
1741 	err = pci_request_regions(pci, "ICH HD audio");
1742 	if (err < 0)
1743 		return err;
1744 	chip->region_requested = 1;
1745 
1746 	bus->addr = pci_resource_start(pci, 0);
1747 	bus->remap_addr = pci_ioremap_bar(pci, 0);
1748 	if (bus->remap_addr == NULL) {
1749 		dev_err(card->dev, "ioremap error\n");
1750 		return -ENXIO;
1751 	}
1752 
1753 	if (chip->driver_type == AZX_DRIVER_SKL)
1754 		snd_hdac_bus_parse_capabilities(bus);
1755 
1756 	/*
1757 	 * Some Intel CPUs has always running timer (ART) feature and
1758 	 * controller may have Global time sync reporting capability, so
1759 	 * check both of these before declaring synchronized time reporting
1760 	 * capability SNDRV_PCM_INFO_HAS_LINK_SYNCHRONIZED_ATIME
1761 	 */
1762 	chip->gts_present = false;
1763 
1764 #ifdef CONFIG_X86
1765 	if (bus->ppcap && boot_cpu_has(X86_FEATURE_ART))
1766 		chip->gts_present = true;
1767 #endif
1768 
1769 	if (chip->msi) {
1770 		if (chip->driver_caps & AZX_DCAPS_NO_MSI64) {
1771 			dev_dbg(card->dev, "Disabling 64bit MSI\n");
1772 			pci->no_64bit_msi = true;
1773 		}
1774 		if (pci_enable_msi(pci) < 0)
1775 			chip->msi = 0;
1776 	}
1777 
1778 	pci_set_master(pci);
1779 	synchronize_irq(bus->irq);
1780 
1781 	gcap = azx_readw(chip, GCAP);
1782 	dev_dbg(card->dev, "chipset global capabilities = 0x%x\n", gcap);
1783 
1784 	/* AMD devices support 40 or 48bit DMA, take the safe one */
1785 	if (chip->pci->vendor == PCI_VENDOR_ID_AMD)
1786 		dma_bits = 40;
1787 
1788 	/* disable SB600 64bit support for safety */
1789 	if (chip->pci->vendor == PCI_VENDOR_ID_ATI) {
1790 		struct pci_dev *p_smbus;
1791 		dma_bits = 40;
1792 		p_smbus = pci_get_device(PCI_VENDOR_ID_ATI,
1793 					 PCI_DEVICE_ID_ATI_SBX00_SMBUS,
1794 					 NULL);
1795 		if (p_smbus) {
1796 			if (p_smbus->revision < 0x30)
1797 				gcap &= ~AZX_GCAP_64OK;
1798 			pci_dev_put(p_smbus);
1799 		}
1800 	}
1801 
1802 	/* NVidia hardware normally only supports up to 40 bits of DMA */
1803 	if (chip->pci->vendor == PCI_VENDOR_ID_NVIDIA)
1804 		dma_bits = 40;
1805 
1806 	/* disable 64bit DMA address on some devices */
1807 	if (chip->driver_caps & AZX_DCAPS_NO_64BIT) {
1808 		dev_dbg(card->dev, "Disabling 64bit DMA\n");
1809 		gcap &= ~AZX_GCAP_64OK;
1810 	}
1811 
1812 	/* disable buffer size rounding to 128-byte multiples if supported */
1813 	if (align_buffer_size >= 0)
1814 		chip->align_buffer_size = !!align_buffer_size;
1815 	else {
1816 		if (chip->driver_caps & AZX_DCAPS_NO_ALIGN_BUFSIZE)
1817 			chip->align_buffer_size = 0;
1818 		else
1819 			chip->align_buffer_size = 1;
1820 	}
1821 
1822 	/* allow 64bit DMA address if supported by H/W */
1823 	if (!(gcap & AZX_GCAP_64OK))
1824 		dma_bits = 32;
1825 	if (!dma_set_mask(&pci->dev, DMA_BIT_MASK(dma_bits))) {
1826 		dma_set_coherent_mask(&pci->dev, DMA_BIT_MASK(dma_bits));
1827 	} else {
1828 		dma_set_mask(&pci->dev, DMA_BIT_MASK(32));
1829 		dma_set_coherent_mask(&pci->dev, DMA_BIT_MASK(32));
1830 	}
1831 
1832 	/* read number of streams from GCAP register instead of using
1833 	 * hardcoded value
1834 	 */
1835 	chip->capture_streams = (gcap >> 8) & 0x0f;
1836 	chip->playback_streams = (gcap >> 12) & 0x0f;
1837 	if (!chip->playback_streams && !chip->capture_streams) {
1838 		/* gcap didn't give any info, switching to old method */
1839 
1840 		switch (chip->driver_type) {
1841 		case AZX_DRIVER_ULI:
1842 			chip->playback_streams = ULI_NUM_PLAYBACK;
1843 			chip->capture_streams = ULI_NUM_CAPTURE;
1844 			break;
1845 		case AZX_DRIVER_ATIHDMI:
1846 		case AZX_DRIVER_ATIHDMI_NS:
1847 			chip->playback_streams = ATIHDMI_NUM_PLAYBACK;
1848 			chip->capture_streams = ATIHDMI_NUM_CAPTURE;
1849 			break;
1850 		case AZX_DRIVER_GENERIC:
1851 		default:
1852 			chip->playback_streams = ICH6_NUM_PLAYBACK;
1853 			chip->capture_streams = ICH6_NUM_CAPTURE;
1854 			break;
1855 		}
1856 	}
1857 	chip->capture_index_offset = 0;
1858 	chip->playback_index_offset = chip->capture_streams;
1859 	chip->num_streams = chip->playback_streams + chip->capture_streams;
1860 
1861 	/* sanity check for the SDxCTL.STRM field overflow */
1862 	if (chip->num_streams > 15 &&
1863 	    (chip->driver_caps & AZX_DCAPS_SEPARATE_STREAM_TAG) == 0) {
1864 		dev_warn(chip->card->dev, "number of I/O streams is %d, "
1865 			 "forcing separate stream tags", chip->num_streams);
1866 		chip->driver_caps |= AZX_DCAPS_SEPARATE_STREAM_TAG;
1867 	}
1868 
1869 	/* initialize streams */
1870 	err = azx_init_streams(chip);
1871 	if (err < 0)
1872 		return err;
1873 
1874 	err = azx_alloc_stream_pages(chip);
1875 	if (err < 0)
1876 		return err;
1877 
1878 	/* initialize chip */
1879 	azx_init_pci(chip);
1880 
1881 	snd_hdac_i915_set_bclk(bus);
1882 
1883 	hda_intel_init_chip(chip, (probe_only[dev] & 2) == 0);
1884 
1885 	/* codec detection */
1886 	if (!azx_bus(chip)->codec_mask) {
1887 		dev_err(card->dev, "no codecs found!\n");
1888 		return -ENODEV;
1889 	}
1890 
1891 	if (azx_acquire_irq(chip, 0) < 0)
1892 		return -EBUSY;
1893 
1894 	strcpy(card->driver, "HDA-Intel");
1895 	strlcpy(card->shortname, driver_short_names[chip->driver_type],
1896 		sizeof(card->shortname));
1897 	snprintf(card->longname, sizeof(card->longname),
1898 		 "%s at 0x%lx irq %i",
1899 		 card->shortname, bus->addr, bus->irq);
1900 
1901 	return 0;
1902 }
1903 
1904 #ifdef CONFIG_SND_HDA_PATCH_LOADER
1905 /* callback from request_firmware_nowait() */
1906 static void azx_firmware_cb(const struct firmware *fw, void *context)
1907 {
1908 	struct snd_card *card = context;
1909 	struct azx *chip = card->private_data;
1910 	struct pci_dev *pci = chip->pci;
1911 
1912 	if (!fw) {
1913 		dev_err(card->dev, "Cannot load firmware, aborting\n");
1914 		goto error;
1915 	}
1916 
1917 	chip->fw = fw;
1918 	if (!chip->disabled) {
1919 		/* continue probing */
1920 		if (azx_probe_continue(chip))
1921 			goto error;
1922 	}
1923 	return; /* OK */
1924 
1925  error:
1926 	snd_card_free(card);
1927 	pci_set_drvdata(pci, NULL);
1928 }
1929 #endif
1930 
1931 /*
1932  * HDA controller ops.
1933  */
1934 
1935 /* PCI register access. */
1936 static void pci_azx_writel(u32 value, u32 __iomem *addr)
1937 {
1938 	writel(value, addr);
1939 }
1940 
1941 static u32 pci_azx_readl(u32 __iomem *addr)
1942 {
1943 	return readl(addr);
1944 }
1945 
1946 static void pci_azx_writew(u16 value, u16 __iomem *addr)
1947 {
1948 	writew(value, addr);
1949 }
1950 
1951 static u16 pci_azx_readw(u16 __iomem *addr)
1952 {
1953 	return readw(addr);
1954 }
1955 
1956 static void pci_azx_writeb(u8 value, u8 __iomem *addr)
1957 {
1958 	writeb(value, addr);
1959 }
1960 
1961 static u8 pci_azx_readb(u8 __iomem *addr)
1962 {
1963 	return readb(addr);
1964 }
1965 
1966 static int disable_msi_reset_irq(struct azx *chip)
1967 {
1968 	struct hdac_bus *bus = azx_bus(chip);
1969 	int err;
1970 
1971 	free_irq(bus->irq, chip);
1972 	bus->irq = -1;
1973 	pci_disable_msi(chip->pci);
1974 	chip->msi = 0;
1975 	err = azx_acquire_irq(chip, 1);
1976 	if (err < 0)
1977 		return err;
1978 
1979 	return 0;
1980 }
1981 
1982 /* DMA page allocation helpers.  */
1983 static int dma_alloc_pages(struct hdac_bus *bus,
1984 			   int type,
1985 			   size_t size,
1986 			   struct snd_dma_buffer *buf)
1987 {
1988 	struct azx *chip = bus_to_azx(bus);
1989 
1990 	if (!azx_snoop(chip) && type == SNDRV_DMA_TYPE_DEV)
1991 		type = SNDRV_DMA_TYPE_DEV_UC;
1992 	return snd_dma_alloc_pages(type, bus->dev, size, buf);
1993 }
1994 
1995 static void dma_free_pages(struct hdac_bus *bus, struct snd_dma_buffer *buf)
1996 {
1997 	snd_dma_free_pages(buf);
1998 }
1999 
2000 static void pcm_mmap_prepare(struct snd_pcm_substream *substream,
2001 			     struct vm_area_struct *area)
2002 {
2003 #ifdef CONFIG_X86
2004 	struct azx_pcm *apcm = snd_pcm_substream_chip(substream);
2005 	struct azx *chip = apcm->chip;
2006 	if (chip->uc_buffer)
2007 		area->vm_page_prot = pgprot_writecombine(area->vm_page_prot);
2008 #endif
2009 }
2010 
2011 static const struct hdac_io_ops pci_hda_io_ops = {
2012 	.reg_writel = pci_azx_writel,
2013 	.reg_readl = pci_azx_readl,
2014 	.reg_writew = pci_azx_writew,
2015 	.reg_readw = pci_azx_readw,
2016 	.reg_writeb = pci_azx_writeb,
2017 	.reg_readb = pci_azx_readb,
2018 	.dma_alloc_pages = dma_alloc_pages,
2019 	.dma_free_pages = dma_free_pages,
2020 };
2021 
2022 static const struct hda_controller_ops pci_hda_ops = {
2023 	.disable_msi_reset_irq = disable_msi_reset_irq,
2024 	.pcm_mmap_prepare = pcm_mmap_prepare,
2025 	.position_check = azx_position_check,
2026 };
2027 
2028 static int azx_probe(struct pci_dev *pci,
2029 		     const struct pci_device_id *pci_id)
2030 {
2031 	static int dev;
2032 	struct snd_card *card;
2033 	struct hda_intel *hda;
2034 	struct azx *chip;
2035 	bool schedule_probe;
2036 	int err;
2037 
2038 	if (dev >= SNDRV_CARDS)
2039 		return -ENODEV;
2040 	if (!enable[dev]) {
2041 		dev++;
2042 		return -ENOENT;
2043 	}
2044 
2045 	err = snd_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
2046 			   0, &card);
2047 	if (err < 0) {
2048 		dev_err(&pci->dev, "Error creating card!\n");
2049 		return err;
2050 	}
2051 
2052 	err = azx_create(card, pci, dev, pci_id->driver_data, &chip);
2053 	if (err < 0)
2054 		goto out_free;
2055 	card->private_data = chip;
2056 	hda = container_of(chip, struct hda_intel, chip);
2057 
2058 	pci_set_drvdata(pci, card);
2059 
2060 	err = register_vga_switcheroo(chip);
2061 	if (err < 0) {
2062 		dev_err(card->dev, "Error registering vga_switcheroo client\n");
2063 		goto out_free;
2064 	}
2065 
2066 	if (check_hdmi_disabled(pci)) {
2067 		dev_info(card->dev, "VGA controller is disabled\n");
2068 		dev_info(card->dev, "Delaying initialization\n");
2069 		chip->disabled = true;
2070 	}
2071 
2072 	schedule_probe = !chip->disabled;
2073 
2074 #ifdef CONFIG_SND_HDA_PATCH_LOADER
2075 	if (patch[dev] && *patch[dev]) {
2076 		dev_info(card->dev, "Applying patch firmware '%s'\n",
2077 			 patch[dev]);
2078 		err = request_firmware_nowait(THIS_MODULE, true, patch[dev],
2079 					      &pci->dev, GFP_KERNEL, card,
2080 					      azx_firmware_cb);
2081 		if (err < 0)
2082 			goto out_free;
2083 		schedule_probe = false; /* continued in azx_firmware_cb() */
2084 	}
2085 #endif /* CONFIG_SND_HDA_PATCH_LOADER */
2086 
2087 #ifndef CONFIG_SND_HDA_I915
2088 	if (CONTROLLER_IN_GPU(pci))
2089 		dev_err(card->dev, "Haswell/Broadwell HDMI/DP must build in CONFIG_SND_HDA_I915\n");
2090 #endif
2091 
2092 	if (schedule_probe)
2093 		schedule_work(&hda->probe_work);
2094 
2095 	dev++;
2096 	if (chip->disabled)
2097 		complete_all(&hda->probe_wait);
2098 	return 0;
2099 
2100 out_free:
2101 	snd_card_free(card);
2102 	return err;
2103 }
2104 
2105 #ifdef CONFIG_PM
2106 /* On some boards setting power_save to a non 0 value leads to clicking /
2107  * popping sounds when ever we enter/leave powersaving mode. Ideally we would
2108  * figure out how to avoid these sounds, but that is not always feasible.
2109  * So we keep a list of devices where we disable powersaving as its known
2110  * to causes problems on these devices.
2111  */
2112 static struct snd_pci_quirk power_save_blacklist[] = {
2113 	/* https://bugzilla.redhat.com/show_bug.cgi?id=1525104 */
2114 	SND_PCI_QUIRK(0x1849, 0xc892, "Asrock B85M-ITX", 0),
2115 	/* https://bugzilla.redhat.com/show_bug.cgi?id=1525104 */
2116 	SND_PCI_QUIRK(0x1849, 0x0397, "Asrock N68C-S UCC", 0),
2117 	/* https://bugzilla.redhat.com/show_bug.cgi?id=1525104 */
2118 	SND_PCI_QUIRK(0x1849, 0x7662, "Asrock H81M-HDS", 0),
2119 	/* https://bugzilla.redhat.com/show_bug.cgi?id=1525104 */
2120 	SND_PCI_QUIRK(0x1043, 0x8733, "Asus Prime X370-Pro", 0),
2121 	/* https://bugzilla.redhat.com/show_bug.cgi?id=1581607 */
2122 	SND_PCI_QUIRK(0x1558, 0x3501, "Clevo W35xSS_370SS", 0),
2123 	/* https://bugzilla.redhat.com/show_bug.cgi?id=1525104 */
2124 	SND_PCI_QUIRK(0x1028, 0x0497, "Dell Precision T3600", 0),
2125 	/* https://bugzilla.redhat.com/show_bug.cgi?id=1525104 */
2126 	/* Note the P55A-UD3 and Z87-D3HP share the subsys id for the HDA dev */
2127 	SND_PCI_QUIRK(0x1458, 0xa002, "Gigabyte P55A-UD3 / Z87-D3HP", 0),
2128 	/* https://bugzilla.redhat.com/show_bug.cgi?id=1525104 */
2129 	SND_PCI_QUIRK(0x8086, 0x2040, "Intel DZ77BH-55K", 0),
2130 	/* https://bugzilla.kernel.org/show_bug.cgi?id=199607 */
2131 	SND_PCI_QUIRK(0x8086, 0x2057, "Intel NUC5i7RYB", 0),
2132 	/* https://bugs.launchpad.net/bugs/1821663 */
2133 	SND_PCI_QUIRK(0x8086, 0x2064, "Intel SDP 8086:2064", 0),
2134 	/* https://bugzilla.redhat.com/show_bug.cgi?id=1520902 */
2135 	SND_PCI_QUIRK(0x8086, 0x2068, "Intel NUC7i3BNB", 0),
2136 	/* https://bugzilla.kernel.org/show_bug.cgi?id=198611 */
2137 	SND_PCI_QUIRK(0x17aa, 0x2227, "Lenovo X1 Carbon 3rd Gen", 0),
2138 	/* https://bugzilla.redhat.com/show_bug.cgi?id=1689623 */
2139 	SND_PCI_QUIRK(0x17aa, 0x367b, "Lenovo IdeaCentre B550", 0),
2140 	/* https://bugzilla.redhat.com/show_bug.cgi?id=1572975 */
2141 	SND_PCI_QUIRK(0x17aa, 0x36a7, "Lenovo C50 All in one", 0),
2142 	/* https://bugs.launchpad.net/bugs/1821663 */
2143 	SND_PCI_QUIRK(0x1631, 0xe017, "Packard Bell NEC IMEDIA 5204", 0),
2144 	{}
2145 };
2146 #endif /* CONFIG_PM */
2147 
2148 static void set_default_power_save(struct azx *chip)
2149 {
2150 	int val = power_save;
2151 
2152 #ifdef CONFIG_PM
2153 	if (pm_blacklist) {
2154 		const struct snd_pci_quirk *q;
2155 
2156 		q = snd_pci_quirk_lookup(chip->pci, power_save_blacklist);
2157 		if (q && val) {
2158 			dev_info(chip->card->dev, "device %04x:%04x is on the power_save blacklist, forcing power_save to 0\n",
2159 				 q->subvendor, q->subdevice);
2160 			val = 0;
2161 		}
2162 	}
2163 #endif /* CONFIG_PM */
2164 	snd_hda_set_power_save(&chip->bus, val * 1000);
2165 }
2166 
2167 /* number of codec slots for each chipset: 0 = default slots (i.e. 4) */
2168 static unsigned int azx_max_codecs[AZX_NUM_DRIVERS] = {
2169 	[AZX_DRIVER_NVIDIA] = 8,
2170 	[AZX_DRIVER_TERA] = 1,
2171 };
2172 
2173 static int azx_probe_continue(struct azx *chip)
2174 {
2175 	struct hda_intel *hda = container_of(chip, struct hda_intel, chip);
2176 	struct hdac_bus *bus = azx_bus(chip);
2177 	struct pci_dev *pci = chip->pci;
2178 	int dev = chip->dev_index;
2179 	int err;
2180 
2181 	to_hda_bus(bus)->bus_probing = 1;
2182 	hda->probe_continued = 1;
2183 
2184 	/* bind with i915 if needed */
2185 	if (chip->driver_caps & AZX_DCAPS_I915_COMPONENT) {
2186 		err = snd_hdac_i915_init(bus);
2187 		if (err < 0) {
2188 			/* if the controller is bound only with HDMI/DP
2189 			 * (for HSW and BDW), we need to abort the probe;
2190 			 * for other chips, still continue probing as other
2191 			 * codecs can be on the same link.
2192 			 */
2193 			if (CONTROLLER_IN_GPU(pci)) {
2194 				dev_err(chip->card->dev,
2195 					"HSW/BDW HD-audio HDMI/DP requires binding with gfx driver\n");
2196 				goto out_free;
2197 			} else {
2198 				/* don't bother any longer */
2199 				chip->driver_caps &= ~AZX_DCAPS_I915_COMPONENT;
2200 			}
2201 		}
2202 
2203 		/* HSW/BDW controllers need this power */
2204 		if (CONTROLLER_IN_GPU(pci))
2205 			hda->need_i915_power = 1;
2206 	}
2207 
2208 	/* Request display power well for the HDA controller or codec. For
2209 	 * Haswell/Broadwell, both the display HDA controller and codec need
2210 	 * this power. For other platforms, like Baytrail/Braswell, only the
2211 	 * display codec needs the power and it can be released after probe.
2212 	 */
2213 	display_power(chip, true);
2214 
2215 	err = azx_first_init(chip);
2216 	if (err < 0)
2217 		goto out_free;
2218 
2219 #ifdef CONFIG_SND_HDA_INPUT_BEEP
2220 	chip->beep_mode = beep_mode[dev];
2221 #endif
2222 
2223 	/* create codec instances */
2224 	err = azx_probe_codecs(chip, azx_max_codecs[chip->driver_type]);
2225 	if (err < 0)
2226 		goto out_free;
2227 
2228 #ifdef CONFIG_SND_HDA_PATCH_LOADER
2229 	if (chip->fw) {
2230 		err = snd_hda_load_patch(&chip->bus, chip->fw->size,
2231 					 chip->fw->data);
2232 		if (err < 0)
2233 			goto out_free;
2234 #ifndef CONFIG_PM
2235 		release_firmware(chip->fw); /* no longer needed */
2236 		chip->fw = NULL;
2237 #endif
2238 	}
2239 #endif
2240 	if ((probe_only[dev] & 1) == 0) {
2241 		err = azx_codec_configure(chip);
2242 		if (err < 0)
2243 			goto out_free;
2244 	}
2245 
2246 	err = snd_card_register(chip->card);
2247 	if (err < 0)
2248 		goto out_free;
2249 
2250 	setup_vga_switcheroo_runtime_pm(chip);
2251 
2252 	chip->running = 1;
2253 	azx_add_card_list(chip);
2254 
2255 	set_default_power_save(chip);
2256 
2257 	if (azx_has_pm_runtime(chip))
2258 		pm_runtime_put_autosuspend(&pci->dev);
2259 
2260 out_free:
2261 	if (err < 0 || !hda->need_i915_power)
2262 		display_power(chip, false);
2263 	if (err < 0)
2264 		hda->init_failed = 1;
2265 	complete_all(&hda->probe_wait);
2266 	to_hda_bus(bus)->bus_probing = 0;
2267 	return err;
2268 }
2269 
2270 static void azx_remove(struct pci_dev *pci)
2271 {
2272 	struct snd_card *card = pci_get_drvdata(pci);
2273 	struct azx *chip;
2274 	struct hda_intel *hda;
2275 
2276 	if (card) {
2277 		/* cancel the pending probing work */
2278 		chip = card->private_data;
2279 		hda = container_of(chip, struct hda_intel, chip);
2280 		/* FIXME: below is an ugly workaround.
2281 		 * Both device_release_driver() and driver_probe_device()
2282 		 * take *both* the device's and its parent's lock before
2283 		 * calling the remove() and probe() callbacks.  The codec
2284 		 * probe takes the locks of both the codec itself and its
2285 		 * parent, i.e. the PCI controller dev.  Meanwhile, when
2286 		 * the PCI controller is unbound, it takes its lock, too
2287 		 * ==> ouch, a deadlock!
2288 		 * As a workaround, we unlock temporarily here the controller
2289 		 * device during cancel_work_sync() call.
2290 		 */
2291 		device_unlock(&pci->dev);
2292 		cancel_work_sync(&hda->probe_work);
2293 		device_lock(&pci->dev);
2294 
2295 		snd_card_free(card);
2296 	}
2297 }
2298 
2299 static void azx_shutdown(struct pci_dev *pci)
2300 {
2301 	struct snd_card *card = pci_get_drvdata(pci);
2302 	struct azx *chip;
2303 
2304 	if (!card)
2305 		return;
2306 	chip = card->private_data;
2307 	if (chip && chip->running)
2308 		azx_stop_chip(chip);
2309 }
2310 
2311 /* PCI IDs */
2312 static const struct pci_device_id azx_ids[] = {
2313 	/* CPT */
2314 	{ PCI_DEVICE(0x8086, 0x1c20),
2315 	  .driver_data = AZX_DRIVER_PCH | AZX_DCAPS_INTEL_PCH_NOPM },
2316 	/* PBG */
2317 	{ PCI_DEVICE(0x8086, 0x1d20),
2318 	  .driver_data = AZX_DRIVER_PCH | AZX_DCAPS_INTEL_PCH_NOPM },
2319 	/* Panther Point */
2320 	{ PCI_DEVICE(0x8086, 0x1e20),
2321 	  .driver_data = AZX_DRIVER_PCH | AZX_DCAPS_INTEL_PCH_NOPM },
2322 	/* Lynx Point */
2323 	{ PCI_DEVICE(0x8086, 0x8c20),
2324 	  .driver_data = AZX_DRIVER_PCH | AZX_DCAPS_INTEL_PCH },
2325 	/* 9 Series */
2326 	{ PCI_DEVICE(0x8086, 0x8ca0),
2327 	  .driver_data = AZX_DRIVER_PCH | AZX_DCAPS_INTEL_PCH },
2328 	/* Wellsburg */
2329 	{ PCI_DEVICE(0x8086, 0x8d20),
2330 	  .driver_data = AZX_DRIVER_PCH | AZX_DCAPS_INTEL_PCH },
2331 	{ PCI_DEVICE(0x8086, 0x8d21),
2332 	  .driver_data = AZX_DRIVER_PCH | AZX_DCAPS_INTEL_PCH },
2333 	/* Lewisburg */
2334 	{ PCI_DEVICE(0x8086, 0xa1f0),
2335 	  .driver_data = AZX_DRIVER_PCH | AZX_DCAPS_INTEL_SKYLAKE },
2336 	{ PCI_DEVICE(0x8086, 0xa270),
2337 	  .driver_data = AZX_DRIVER_PCH | AZX_DCAPS_INTEL_SKYLAKE },
2338 	/* Lynx Point-LP */
2339 	{ PCI_DEVICE(0x8086, 0x9c20),
2340 	  .driver_data = AZX_DRIVER_PCH | AZX_DCAPS_INTEL_PCH },
2341 	/* Lynx Point-LP */
2342 	{ PCI_DEVICE(0x8086, 0x9c21),
2343 	  .driver_data = AZX_DRIVER_PCH | AZX_DCAPS_INTEL_PCH },
2344 	/* Wildcat Point-LP */
2345 	{ PCI_DEVICE(0x8086, 0x9ca0),
2346 	  .driver_data = AZX_DRIVER_PCH | AZX_DCAPS_INTEL_PCH },
2347 	/* Sunrise Point */
2348 	{ PCI_DEVICE(0x8086, 0xa170),
2349 	  .driver_data = AZX_DRIVER_SKL | AZX_DCAPS_INTEL_SKYLAKE },
2350 	/* Sunrise Point-LP */
2351 	{ PCI_DEVICE(0x8086, 0x9d70),
2352 	  .driver_data = AZX_DRIVER_SKL | AZX_DCAPS_INTEL_SKYLAKE },
2353 	/* Kabylake */
2354 	{ PCI_DEVICE(0x8086, 0xa171),
2355 	  .driver_data = AZX_DRIVER_SKL | AZX_DCAPS_INTEL_SKYLAKE },
2356 	/* Kabylake-LP */
2357 	{ PCI_DEVICE(0x8086, 0x9d71),
2358 	  .driver_data = AZX_DRIVER_SKL | AZX_DCAPS_INTEL_SKYLAKE },
2359 	/* Kabylake-H */
2360 	{ PCI_DEVICE(0x8086, 0xa2f0),
2361 	  .driver_data = AZX_DRIVER_SKL | AZX_DCAPS_INTEL_SKYLAKE },
2362 	/* Coffelake */
2363 	{ PCI_DEVICE(0x8086, 0xa348),
2364 	  .driver_data = AZX_DRIVER_SKL | AZX_DCAPS_INTEL_SKYLAKE},
2365 	/* Cannonlake */
2366 	{ PCI_DEVICE(0x8086, 0x9dc8),
2367 	  .driver_data = AZX_DRIVER_SKL | AZX_DCAPS_INTEL_SKYLAKE},
2368 	/* CometLake-LP */
2369 	{ PCI_DEVICE(0x8086, 0x02C8),
2370 	  .driver_data = AZX_DRIVER_SKL | AZX_DCAPS_INTEL_SKYLAKE},
2371 	/* CometLake-H */
2372 	{ PCI_DEVICE(0x8086, 0x06C8),
2373 	  .driver_data = AZX_DRIVER_SKL | AZX_DCAPS_INTEL_SKYLAKE},
2374 	/* Icelake */
2375 	{ PCI_DEVICE(0x8086, 0x34c8),
2376 	  .driver_data = AZX_DRIVER_SKL | AZX_DCAPS_INTEL_SKYLAKE},
2377 	/* Broxton-P(Apollolake) */
2378 	{ PCI_DEVICE(0x8086, 0x5a98),
2379 	  .driver_data = AZX_DRIVER_SKL | AZX_DCAPS_INTEL_BROXTON },
2380 	/* Broxton-T */
2381 	{ PCI_DEVICE(0x8086, 0x1a98),
2382 	  .driver_data = AZX_DRIVER_SKL | AZX_DCAPS_INTEL_BROXTON },
2383 	/* Gemini-Lake */
2384 	{ PCI_DEVICE(0x8086, 0x3198),
2385 	  .driver_data = AZX_DRIVER_SKL | AZX_DCAPS_INTEL_BROXTON },
2386 	/* Haswell */
2387 	{ PCI_DEVICE(0x8086, 0x0a0c),
2388 	  .driver_data = AZX_DRIVER_HDMI | AZX_DCAPS_INTEL_HASWELL },
2389 	{ PCI_DEVICE(0x8086, 0x0c0c),
2390 	  .driver_data = AZX_DRIVER_HDMI | AZX_DCAPS_INTEL_HASWELL },
2391 	{ PCI_DEVICE(0x8086, 0x0d0c),
2392 	  .driver_data = AZX_DRIVER_HDMI | AZX_DCAPS_INTEL_HASWELL },
2393 	/* Broadwell */
2394 	{ PCI_DEVICE(0x8086, 0x160c),
2395 	  .driver_data = AZX_DRIVER_HDMI | AZX_DCAPS_INTEL_BROADWELL },
2396 	/* 5 Series/3400 */
2397 	{ PCI_DEVICE(0x8086, 0x3b56),
2398 	  .driver_data = AZX_DRIVER_SCH | AZX_DCAPS_INTEL_PCH_NOPM },
2399 	/* Poulsbo */
2400 	{ PCI_DEVICE(0x8086, 0x811b),
2401 	  .driver_data = AZX_DRIVER_SCH | AZX_DCAPS_INTEL_PCH_BASE },
2402 	/* Oaktrail */
2403 	{ PCI_DEVICE(0x8086, 0x080a),
2404 	  .driver_data = AZX_DRIVER_SCH | AZX_DCAPS_INTEL_PCH_BASE },
2405 	/* BayTrail */
2406 	{ PCI_DEVICE(0x8086, 0x0f04),
2407 	  .driver_data = AZX_DRIVER_PCH | AZX_DCAPS_INTEL_BAYTRAIL },
2408 	/* Braswell */
2409 	{ PCI_DEVICE(0x8086, 0x2284),
2410 	  .driver_data = AZX_DRIVER_PCH | AZX_DCAPS_INTEL_BRASWELL },
2411 	/* ICH6 */
2412 	{ PCI_DEVICE(0x8086, 0x2668),
2413 	  .driver_data = AZX_DRIVER_ICH | AZX_DCAPS_INTEL_ICH },
2414 	/* ICH7 */
2415 	{ PCI_DEVICE(0x8086, 0x27d8),
2416 	  .driver_data = AZX_DRIVER_ICH | AZX_DCAPS_INTEL_ICH },
2417 	/* ESB2 */
2418 	{ PCI_DEVICE(0x8086, 0x269a),
2419 	  .driver_data = AZX_DRIVER_ICH | AZX_DCAPS_INTEL_ICH },
2420 	/* ICH8 */
2421 	{ PCI_DEVICE(0x8086, 0x284b),
2422 	  .driver_data = AZX_DRIVER_ICH | AZX_DCAPS_INTEL_ICH },
2423 	/* ICH9 */
2424 	{ PCI_DEVICE(0x8086, 0x293e),
2425 	  .driver_data = AZX_DRIVER_ICH | AZX_DCAPS_INTEL_ICH },
2426 	/* ICH9 */
2427 	{ PCI_DEVICE(0x8086, 0x293f),
2428 	  .driver_data = AZX_DRIVER_ICH | AZX_DCAPS_INTEL_ICH },
2429 	/* ICH10 */
2430 	{ PCI_DEVICE(0x8086, 0x3a3e),
2431 	  .driver_data = AZX_DRIVER_ICH | AZX_DCAPS_INTEL_ICH },
2432 	/* ICH10 */
2433 	{ PCI_DEVICE(0x8086, 0x3a6e),
2434 	  .driver_data = AZX_DRIVER_ICH | AZX_DCAPS_INTEL_ICH },
2435 	/* Generic Intel */
2436 	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_ANY_ID),
2437 	  .class = PCI_CLASS_MULTIMEDIA_HD_AUDIO << 8,
2438 	  .class_mask = 0xffffff,
2439 	  .driver_data = AZX_DRIVER_ICH | AZX_DCAPS_NO_ALIGN_BUFSIZE },
2440 	/* ATI SB 450/600/700/800/900 */
2441 	{ PCI_DEVICE(0x1002, 0x437b),
2442 	  .driver_data = AZX_DRIVER_ATI | AZX_DCAPS_PRESET_ATI_SB },
2443 	{ PCI_DEVICE(0x1002, 0x4383),
2444 	  .driver_data = AZX_DRIVER_ATI | AZX_DCAPS_PRESET_ATI_SB },
2445 	/* AMD Hudson */
2446 	{ PCI_DEVICE(0x1022, 0x780d),
2447 	  .driver_data = AZX_DRIVER_GENERIC | AZX_DCAPS_PRESET_ATI_SB },
2448 	/* AMD Stoney */
2449 	{ PCI_DEVICE(0x1022, 0x157a),
2450 	  .driver_data = AZX_DRIVER_GENERIC | AZX_DCAPS_PRESET_ATI_SB |
2451 			 AZX_DCAPS_PM_RUNTIME },
2452 	/* AMD Raven */
2453 	{ PCI_DEVICE(0x1022, 0x15e3),
2454 	  .driver_data = AZX_DRIVER_GENERIC | AZX_DCAPS_PRESET_ATI_SB |
2455 			 AZX_DCAPS_PM_RUNTIME },
2456 	/* ATI HDMI */
2457 	{ PCI_DEVICE(0x1002, 0x0002),
2458 	  .driver_data = AZX_DRIVER_ATIHDMI_NS | AZX_DCAPS_PRESET_ATI_HDMI_NS },
2459 	{ PCI_DEVICE(0x1002, 0x1308),
2460 	  .driver_data = AZX_DRIVER_ATIHDMI_NS | AZX_DCAPS_PRESET_ATI_HDMI_NS },
2461 	{ PCI_DEVICE(0x1002, 0x157a),
2462 	  .driver_data = AZX_DRIVER_ATIHDMI_NS | AZX_DCAPS_PRESET_ATI_HDMI_NS },
2463 	{ PCI_DEVICE(0x1002, 0x15b3),
2464 	  .driver_data = AZX_DRIVER_ATIHDMI_NS | AZX_DCAPS_PRESET_ATI_HDMI_NS },
2465 	{ PCI_DEVICE(0x1002, 0x793b),
2466 	  .driver_data = AZX_DRIVER_ATIHDMI | AZX_DCAPS_PRESET_ATI_HDMI },
2467 	{ PCI_DEVICE(0x1002, 0x7919),
2468 	  .driver_data = AZX_DRIVER_ATIHDMI | AZX_DCAPS_PRESET_ATI_HDMI },
2469 	{ PCI_DEVICE(0x1002, 0x960f),
2470 	  .driver_data = AZX_DRIVER_ATIHDMI | AZX_DCAPS_PRESET_ATI_HDMI },
2471 	{ PCI_DEVICE(0x1002, 0x970f),
2472 	  .driver_data = AZX_DRIVER_ATIHDMI | AZX_DCAPS_PRESET_ATI_HDMI },
2473 	{ PCI_DEVICE(0x1002, 0x9840),
2474 	  .driver_data = AZX_DRIVER_ATIHDMI_NS | AZX_DCAPS_PRESET_ATI_HDMI_NS },
2475 	{ PCI_DEVICE(0x1002, 0xaa00),
2476 	  .driver_data = AZX_DRIVER_ATIHDMI | AZX_DCAPS_PRESET_ATI_HDMI },
2477 	{ PCI_DEVICE(0x1002, 0xaa08),
2478 	  .driver_data = AZX_DRIVER_ATIHDMI | AZX_DCAPS_PRESET_ATI_HDMI },
2479 	{ PCI_DEVICE(0x1002, 0xaa10),
2480 	  .driver_data = AZX_DRIVER_ATIHDMI | AZX_DCAPS_PRESET_ATI_HDMI },
2481 	{ PCI_DEVICE(0x1002, 0xaa18),
2482 	  .driver_data = AZX_DRIVER_ATIHDMI | AZX_DCAPS_PRESET_ATI_HDMI },
2483 	{ PCI_DEVICE(0x1002, 0xaa20),
2484 	  .driver_data = AZX_DRIVER_ATIHDMI | AZX_DCAPS_PRESET_ATI_HDMI },
2485 	{ PCI_DEVICE(0x1002, 0xaa28),
2486 	  .driver_data = AZX_DRIVER_ATIHDMI | AZX_DCAPS_PRESET_ATI_HDMI },
2487 	{ PCI_DEVICE(0x1002, 0xaa30),
2488 	  .driver_data = AZX_DRIVER_ATIHDMI | AZX_DCAPS_PRESET_ATI_HDMI },
2489 	{ PCI_DEVICE(0x1002, 0xaa38),
2490 	  .driver_data = AZX_DRIVER_ATIHDMI | AZX_DCAPS_PRESET_ATI_HDMI },
2491 	{ PCI_DEVICE(0x1002, 0xaa40),
2492 	  .driver_data = AZX_DRIVER_ATIHDMI | AZX_DCAPS_PRESET_ATI_HDMI },
2493 	{ PCI_DEVICE(0x1002, 0xaa48),
2494 	  .driver_data = AZX_DRIVER_ATIHDMI | AZX_DCAPS_PRESET_ATI_HDMI },
2495 	{ PCI_DEVICE(0x1002, 0xaa50),
2496 	  .driver_data = AZX_DRIVER_ATIHDMI | AZX_DCAPS_PRESET_ATI_HDMI },
2497 	{ PCI_DEVICE(0x1002, 0xaa58),
2498 	  .driver_data = AZX_DRIVER_ATIHDMI | AZX_DCAPS_PRESET_ATI_HDMI },
2499 	{ PCI_DEVICE(0x1002, 0xaa60),
2500 	  .driver_data = AZX_DRIVER_ATIHDMI | AZX_DCAPS_PRESET_ATI_HDMI },
2501 	{ PCI_DEVICE(0x1002, 0xaa68),
2502 	  .driver_data = AZX_DRIVER_ATIHDMI | AZX_DCAPS_PRESET_ATI_HDMI },
2503 	{ PCI_DEVICE(0x1002, 0xaa80),
2504 	  .driver_data = AZX_DRIVER_ATIHDMI | AZX_DCAPS_PRESET_ATI_HDMI },
2505 	{ PCI_DEVICE(0x1002, 0xaa88),
2506 	  .driver_data = AZX_DRIVER_ATIHDMI | AZX_DCAPS_PRESET_ATI_HDMI },
2507 	{ PCI_DEVICE(0x1002, 0xaa90),
2508 	  .driver_data = AZX_DRIVER_ATIHDMI | AZX_DCAPS_PRESET_ATI_HDMI },
2509 	{ PCI_DEVICE(0x1002, 0xaa98),
2510 	  .driver_data = AZX_DRIVER_ATIHDMI | AZX_DCAPS_PRESET_ATI_HDMI },
2511 	{ PCI_DEVICE(0x1002, 0x9902),
2512 	  .driver_data = AZX_DRIVER_ATIHDMI_NS | AZX_DCAPS_PRESET_ATI_HDMI_NS },
2513 	{ PCI_DEVICE(0x1002, 0xaaa0),
2514 	  .driver_data = AZX_DRIVER_ATIHDMI_NS | AZX_DCAPS_PRESET_ATI_HDMI_NS },
2515 	{ PCI_DEVICE(0x1002, 0xaaa8),
2516 	  .driver_data = AZX_DRIVER_ATIHDMI_NS | AZX_DCAPS_PRESET_ATI_HDMI_NS },
2517 	{ PCI_DEVICE(0x1002, 0xaab0),
2518 	  .driver_data = AZX_DRIVER_ATIHDMI_NS | AZX_DCAPS_PRESET_ATI_HDMI_NS },
2519 	{ PCI_DEVICE(0x1002, 0xaac0),
2520 	  .driver_data = AZX_DRIVER_ATIHDMI_NS | AZX_DCAPS_PRESET_ATI_HDMI_NS },
2521 	{ PCI_DEVICE(0x1002, 0xaac8),
2522 	  .driver_data = AZX_DRIVER_ATIHDMI_NS | AZX_DCAPS_PRESET_ATI_HDMI_NS },
2523 	{ PCI_DEVICE(0x1002, 0xaad8),
2524 	  .driver_data = AZX_DRIVER_ATIHDMI_NS | AZX_DCAPS_PRESET_ATI_HDMI_NS },
2525 	{ PCI_DEVICE(0x1002, 0xaae8),
2526 	  .driver_data = AZX_DRIVER_ATIHDMI_NS | AZX_DCAPS_PRESET_ATI_HDMI_NS },
2527 	{ PCI_DEVICE(0x1002, 0xaae0),
2528 	  .driver_data = AZX_DRIVER_ATIHDMI_NS | AZX_DCAPS_PRESET_ATI_HDMI_NS },
2529 	{ PCI_DEVICE(0x1002, 0xaaf0),
2530 	  .driver_data = AZX_DRIVER_ATIHDMI_NS | AZX_DCAPS_PRESET_ATI_HDMI_NS },
2531 	/* VIA VT8251/VT8237A */
2532 	{ PCI_DEVICE(0x1106, 0x3288), .driver_data = AZX_DRIVER_VIA },
2533 	/* VIA GFX VT7122/VX900 */
2534 	{ PCI_DEVICE(0x1106, 0x9170), .driver_data = AZX_DRIVER_GENERIC },
2535 	/* VIA GFX VT6122/VX11 */
2536 	{ PCI_DEVICE(0x1106, 0x9140), .driver_data = AZX_DRIVER_GENERIC },
2537 	/* SIS966 */
2538 	{ PCI_DEVICE(0x1039, 0x7502), .driver_data = AZX_DRIVER_SIS },
2539 	/* ULI M5461 */
2540 	{ PCI_DEVICE(0x10b9, 0x5461), .driver_data = AZX_DRIVER_ULI },
2541 	/* NVIDIA MCP */
2542 	{ PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_ANY_ID),
2543 	  .class = PCI_CLASS_MULTIMEDIA_HD_AUDIO << 8,
2544 	  .class_mask = 0xffffff,
2545 	  .driver_data = AZX_DRIVER_NVIDIA | AZX_DCAPS_PRESET_NVIDIA },
2546 	/* Teradici */
2547 	{ PCI_DEVICE(0x6549, 0x1200),
2548 	  .driver_data = AZX_DRIVER_TERA | AZX_DCAPS_NO_64BIT },
2549 	{ PCI_DEVICE(0x6549, 0x2200),
2550 	  .driver_data = AZX_DRIVER_TERA | AZX_DCAPS_NO_64BIT },
2551 	/* Creative X-Fi (CA0110-IBG) */
2552 	/* CTHDA chips */
2553 	{ PCI_DEVICE(0x1102, 0x0010),
2554 	  .driver_data = AZX_DRIVER_CTHDA | AZX_DCAPS_PRESET_CTHDA },
2555 	{ PCI_DEVICE(0x1102, 0x0012),
2556 	  .driver_data = AZX_DRIVER_CTHDA | AZX_DCAPS_PRESET_CTHDA },
2557 #if !IS_ENABLED(CONFIG_SND_CTXFI)
2558 	/* the following entry conflicts with snd-ctxfi driver,
2559 	 * as ctxfi driver mutates from HD-audio to native mode with
2560 	 * a special command sequence.
2561 	 */
2562 	{ PCI_DEVICE(PCI_VENDOR_ID_CREATIVE, PCI_ANY_ID),
2563 	  .class = PCI_CLASS_MULTIMEDIA_HD_AUDIO << 8,
2564 	  .class_mask = 0xffffff,
2565 	  .driver_data = AZX_DRIVER_CTX | AZX_DCAPS_CTX_WORKAROUND |
2566 	  AZX_DCAPS_NO_64BIT | AZX_DCAPS_POSFIX_LPIB },
2567 #else
2568 	/* this entry seems still valid -- i.e. without emu20kx chip */
2569 	{ PCI_DEVICE(0x1102, 0x0009),
2570 	  .driver_data = AZX_DRIVER_CTX | AZX_DCAPS_CTX_WORKAROUND |
2571 	  AZX_DCAPS_NO_64BIT | AZX_DCAPS_POSFIX_LPIB },
2572 #endif
2573 	/* CM8888 */
2574 	{ PCI_DEVICE(0x13f6, 0x5011),
2575 	  .driver_data = AZX_DRIVER_CMEDIA |
2576 	  AZX_DCAPS_NO_MSI | AZX_DCAPS_POSFIX_LPIB | AZX_DCAPS_SNOOP_OFF },
2577 	/* Vortex86MX */
2578 	{ PCI_DEVICE(0x17f3, 0x3010), .driver_data = AZX_DRIVER_GENERIC },
2579 	/* VMware HDAudio */
2580 	{ PCI_DEVICE(0x15ad, 0x1977), .driver_data = AZX_DRIVER_GENERIC },
2581 	/* AMD/ATI Generic, PCI class code and Vendor ID for HD Audio */
2582 	{ PCI_DEVICE(PCI_VENDOR_ID_ATI, PCI_ANY_ID),
2583 	  .class = PCI_CLASS_MULTIMEDIA_HD_AUDIO << 8,
2584 	  .class_mask = 0xffffff,
2585 	  .driver_data = AZX_DRIVER_GENERIC | AZX_DCAPS_PRESET_ATI_HDMI },
2586 	{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_ANY_ID),
2587 	  .class = PCI_CLASS_MULTIMEDIA_HD_AUDIO << 8,
2588 	  .class_mask = 0xffffff,
2589 	  .driver_data = AZX_DRIVER_GENERIC | AZX_DCAPS_PRESET_ATI_HDMI },
2590 	{ 0, }
2591 };
2592 MODULE_DEVICE_TABLE(pci, azx_ids);
2593 
2594 /* pci_driver definition */
2595 static struct pci_driver azx_driver = {
2596 	.name = KBUILD_MODNAME,
2597 	.id_table = azx_ids,
2598 	.probe = azx_probe,
2599 	.remove = azx_remove,
2600 	.shutdown = azx_shutdown,
2601 	.driver = {
2602 		.pm = AZX_PM_OPS,
2603 	},
2604 };
2605 
2606 module_pci_driver(azx_driver);
2607