~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/sound/soc/intel/skylake/skl.c

Version: ~ [ linux-5.1-rc5 ] ~ [ linux-5.0.7 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.34 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.111 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.168 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.178 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.138 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.65 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-3.9.11 ] ~ [ linux-3.8.13 ] ~ [ linux-3.7.10 ] ~ [ linux-3.6.11 ] ~ [ linux-3.5.7 ] ~ [ linux-3.4.113 ] ~ [ linux-3.3.8 ] ~ [ linux-3.2.102 ] ~ [ linux-3.1.10 ] ~ [ linux-3.0.101 ] ~ [ linux-2.6.39.4 ] ~ [ linux-2.6.38.8 ] ~ [ linux-2.6.37.6 ] ~ [ linux-2.6.36.4 ] ~ [ linux-2.6.35.14 ] ~ [ linux-2.6.34.15 ] ~ [ linux-2.6.33.20 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 /*
  2  *  skl.c - Implementation of ASoC Intel SKL HD Audio driver
  3  *
  4  *  Copyright (C) 2014-2015 Intel Corp
  5  *  Author: Jeeja KP <jeeja.kp@intel.com>
  6  *
  7  *  Derived mostly from Intel HDA driver with following copyrights:
  8  *  Copyright (c) 2004 Takashi Iwai <tiwai@suse.de>
  9  *                     PeiSen Hou <pshou@realtek.com.tw>
 10  *  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 11  *
 12  *  This program is free software; you can redistribute it and/or modify
 13  *  it under the terms of the GNU General Public License as published by
 14  *  the Free Software Foundation; version 2 of the License.
 15  *
 16  *  This program is distributed in the hope that it will be useful, but
 17  *  WITHOUT ANY WARRANTY; without even the implied warranty of
 18  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 19  *  General Public License for more details.
 20  *
 21  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 22  */
 23 
 24 #include <linux/module.h>
 25 #include <linux/pci.h>
 26 #include <linux/pm_runtime.h>
 27 #include <linux/platform_device.h>
 28 #include <linux/firmware.h>
 29 #include <linux/delay.h>
 30 #include <sound/pcm.h>
 31 #include <sound/soc-acpi.h>
 32 #include <sound/soc-acpi-intel-match.h>
 33 #include <sound/hda_register.h>
 34 #include <sound/hdaudio.h>
 35 #include <sound/hda_i915.h>
 36 #include <sound/hda_codec.h>
 37 #include "skl.h"
 38 #include "skl-sst-dsp.h"
 39 #include "skl-sst-ipc.h"
 40 #if IS_ENABLED(CONFIG_SND_SOC_INTEL_SKYLAKE_HDAUDIO_CODEC)
 41 #include "../../../soc/codecs/hdac_hda.h"
 42 #endif
 43 static int skl_pci_binding;
 44 module_param_named(pci_binding, skl_pci_binding, int, 0444);
 45 MODULE_PARM_DESC(pci_binding, "PCI binding (0=auto, 1=only legacy, 2=only asoc");
 46 
 47 /*
 48  * initialize the PCI registers
 49  */
 50 static void skl_update_pci_byte(struct pci_dev *pci, unsigned int reg,
 51                             unsigned char mask, unsigned char val)
 52 {
 53         unsigned char data;
 54 
 55         pci_read_config_byte(pci, reg, &data);
 56         data &= ~mask;
 57         data |= (val & mask);
 58         pci_write_config_byte(pci, reg, data);
 59 }
 60 
 61 static void skl_init_pci(struct skl *skl)
 62 {
 63         struct hdac_bus *bus = skl_to_bus(skl);
 64 
 65         /*
 66          * Clear bits 0-2 of PCI register TCSEL (at offset 0x44)
 67          * TCSEL == Traffic Class Select Register, which sets PCI express QOS
 68          * Ensuring these bits are 0 clears playback static on some HD Audio
 69          * codecs.
 70          * The PCI register TCSEL is defined in the Intel manuals.
 71          */
 72         dev_dbg(bus->dev, "Clearing TCSEL\n");
 73         skl_update_pci_byte(skl->pci, AZX_PCIREG_TCSEL, 0x07, 0);
 74 }
 75 
 76 static void update_pci_dword(struct pci_dev *pci,
 77                         unsigned int reg, u32 mask, u32 val)
 78 {
 79         u32 data = 0;
 80 
 81         pci_read_config_dword(pci, reg, &data);
 82         data &= ~mask;
 83         data |= (val & mask);
 84         pci_write_config_dword(pci, reg, data);
 85 }
 86 
 87 /*
 88  * skl_enable_miscbdcge - enable/dsiable CGCTL.MISCBDCGE bits
 89  *
 90  * @dev: device pointer
 91  * @enable: enable/disable flag
 92  */
 93 static void skl_enable_miscbdcge(struct device *dev, bool enable)
 94 {
 95         struct pci_dev *pci = to_pci_dev(dev);
 96         u32 val;
 97 
 98         val = enable ? AZX_CGCTL_MISCBDCGE_MASK : 0;
 99 
100         update_pci_dword(pci, AZX_PCIREG_CGCTL, AZX_CGCTL_MISCBDCGE_MASK, val);
101 }
102 
103 /**
104  * skl_clock_power_gating: Enable/Disable clock and power gating
105  *
106  * @dev: Device pointer
107  * @enable: Enable/Disable flag
108  */
109 static void skl_clock_power_gating(struct device *dev, bool enable)
110 {
111         struct pci_dev *pci = to_pci_dev(dev);
112         struct hdac_bus *bus = pci_get_drvdata(pci);
113         u32 val;
114 
115         /* Update PDCGE bit of CGCTL register */
116         val = enable ? AZX_CGCTL_ADSPDCGE : 0;
117         update_pci_dword(pci, AZX_PCIREG_CGCTL, AZX_CGCTL_ADSPDCGE, val);
118 
119         /* Update L1SEN bit of EM2 register */
120         val = enable ? AZX_REG_VS_EM2_L1SEN : 0;
121         snd_hdac_chip_updatel(bus, VS_EM2, AZX_REG_VS_EM2_L1SEN, val);
122 
123         /* Update ADSPPGD bit of PGCTL register */
124         val = enable ? 0 : AZX_PGCTL_ADSPPGD;
125         update_pci_dword(pci, AZX_PCIREG_PGCTL, AZX_PGCTL_ADSPPGD, val);
126 }
127 
128 /*
129  * While performing reset, controller may not come back properly causing
130  * issues, so recommendation is to set CGCTL.MISCBDCGE to 0 then do reset
131  * (init chip) and then again set CGCTL.MISCBDCGE to 1
132  */
133 static int skl_init_chip(struct hdac_bus *bus, bool full_reset)
134 {
135         struct hdac_ext_link *hlink;
136         int ret;
137 
138         skl_enable_miscbdcge(bus->dev, false);
139         ret = snd_hdac_bus_init_chip(bus, full_reset);
140 
141         /* Reset stream-to-link mapping */
142         list_for_each_entry(hlink, &bus->hlink_list, list)
143                 bus->io_ops->reg_writel(0, hlink->ml_addr + AZX_REG_ML_LOSIDV);
144 
145         skl_enable_miscbdcge(bus->dev, true);
146 
147         return ret;
148 }
149 
150 void skl_update_d0i3c(struct device *dev, bool enable)
151 {
152         struct pci_dev *pci = to_pci_dev(dev);
153         struct hdac_bus *bus = pci_get_drvdata(pci);
154         u8 reg;
155         int timeout = 50;
156 
157         reg = snd_hdac_chip_readb(bus, VS_D0I3C);
158         /* Do not write to D0I3C until command in progress bit is cleared */
159         while ((reg & AZX_REG_VS_D0I3C_CIP) && --timeout) {
160                 udelay(10);
161                 reg = snd_hdac_chip_readb(bus, VS_D0I3C);
162         }
163 
164         /* Highly unlikely. But if it happens, flag error explicitly */
165         if (!timeout) {
166                 dev_err(bus->dev, "Before D0I3C update: D0I3C CIP timeout\n");
167                 return;
168         }
169 
170         if (enable)
171                 reg = reg | AZX_REG_VS_D0I3C_I3;
172         else
173                 reg = reg & (~AZX_REG_VS_D0I3C_I3);
174 
175         snd_hdac_chip_writeb(bus, VS_D0I3C, reg);
176 
177         timeout = 50;
178         /* Wait for cmd in progress to be cleared before exiting the function */
179         reg = snd_hdac_chip_readb(bus, VS_D0I3C);
180         while ((reg & AZX_REG_VS_D0I3C_CIP) && --timeout) {
181                 udelay(10);
182                 reg = snd_hdac_chip_readb(bus, VS_D0I3C);
183         }
184 
185         /* Highly unlikely. But if it happens, flag error explicitly */
186         if (!timeout) {
187                 dev_err(bus->dev, "After D0I3C update: D0I3C CIP timeout\n");
188                 return;
189         }
190 
191         dev_dbg(bus->dev, "D0I3C register = 0x%x\n",
192                         snd_hdac_chip_readb(bus, VS_D0I3C));
193 }
194 
195 /* called from IRQ */
196 static void skl_stream_update(struct hdac_bus *bus, struct hdac_stream *hstr)
197 {
198         snd_pcm_period_elapsed(hstr->substream);
199 }
200 
201 static irqreturn_t skl_interrupt(int irq, void *dev_id)
202 {
203         struct hdac_bus *bus = dev_id;
204         u32 status;
205 
206         if (!pm_runtime_active(bus->dev))
207                 return IRQ_NONE;
208 
209         spin_lock(&bus->reg_lock);
210 
211         status = snd_hdac_chip_readl(bus, INTSTS);
212         if (status == 0 || status == 0xffffffff) {
213                 spin_unlock(&bus->reg_lock);
214                 return IRQ_NONE;
215         }
216 
217         /* clear rirb int */
218         status = snd_hdac_chip_readb(bus, RIRBSTS);
219         if (status & RIRB_INT_MASK) {
220                 if (status & RIRB_INT_RESPONSE)
221                         snd_hdac_bus_update_rirb(bus);
222                 snd_hdac_chip_writeb(bus, RIRBSTS, RIRB_INT_MASK);
223         }
224 
225         spin_unlock(&bus->reg_lock);
226 
227         return snd_hdac_chip_readl(bus, INTSTS) ? IRQ_WAKE_THREAD : IRQ_HANDLED;
228 }
229 
230 static irqreturn_t skl_threaded_handler(int irq, void *dev_id)
231 {
232         struct hdac_bus *bus = dev_id;
233         u32 status;
234 
235         status = snd_hdac_chip_readl(bus, INTSTS);
236 
237         snd_hdac_bus_handle_stream_irq(bus, status, skl_stream_update);
238 
239         return IRQ_HANDLED;
240 }
241 
242 static int skl_acquire_irq(struct hdac_bus *bus, int do_disconnect)
243 {
244         struct skl *skl = bus_to_skl(bus);
245         int ret;
246 
247         ret = request_threaded_irq(skl->pci->irq, skl_interrupt,
248                         skl_threaded_handler,
249                         IRQF_SHARED,
250                         KBUILD_MODNAME, bus);
251         if (ret) {
252                 dev_err(bus->dev,
253                         "unable to grab IRQ %d, disabling device\n",
254                         skl->pci->irq);
255                 return ret;
256         }
257 
258         bus->irq = skl->pci->irq;
259         pci_intx(skl->pci, 1);
260 
261         return 0;
262 }
263 
264 static int skl_suspend_late(struct device *dev)
265 {
266         struct pci_dev *pci = to_pci_dev(dev);
267         struct hdac_bus *bus = pci_get_drvdata(pci);
268         struct skl *skl = bus_to_skl(bus);
269 
270         return skl_suspend_late_dsp(skl);
271 }
272 
273 #ifdef CONFIG_PM
274 static int _skl_suspend(struct hdac_bus *bus)
275 {
276         struct skl *skl = bus_to_skl(bus);
277         struct pci_dev *pci = to_pci_dev(bus->dev);
278         int ret;
279 
280         snd_hdac_ext_bus_link_power_down_all(bus);
281 
282         ret = skl_suspend_dsp(skl);
283         if (ret < 0)
284                 return ret;
285 
286         snd_hdac_bus_stop_chip(bus);
287         update_pci_dword(pci, AZX_PCIREG_PGCTL,
288                 AZX_PGCTL_LSRMD_MASK, AZX_PGCTL_LSRMD_MASK);
289         skl_enable_miscbdcge(bus->dev, false);
290         snd_hdac_bus_enter_link_reset(bus);
291         skl_enable_miscbdcge(bus->dev, true);
292         skl_cleanup_resources(skl);
293 
294         return 0;
295 }
296 
297 static int _skl_resume(struct hdac_bus *bus)
298 {
299         struct skl *skl = bus_to_skl(bus);
300 
301         skl_init_pci(skl);
302         skl_init_chip(bus, true);
303 
304         return skl_resume_dsp(skl);
305 }
306 #endif
307 
308 #ifdef CONFIG_PM_SLEEP
309 /*
310  * power management
311  */
312 static int skl_suspend(struct device *dev)
313 {
314         struct pci_dev *pci = to_pci_dev(dev);
315         struct hdac_bus *bus = pci_get_drvdata(pci);
316         struct skl *skl  = bus_to_skl(bus);
317         int ret;
318 
319         /*
320          * Do not suspend if streams which are marked ignore suspend are
321          * running, we need to save the state for these and continue
322          */
323         if (skl->supend_active) {
324                 /* turn off the links and stop the CORB/RIRB DMA if it is On */
325                 snd_hdac_ext_bus_link_power_down_all(bus);
326 
327                 if (bus->cmd_dma_state)
328                         snd_hdac_bus_stop_cmd_io(bus);
329 
330                 enable_irq_wake(bus->irq);
331                 pci_save_state(pci);
332         } else {
333                 ret = _skl_suspend(bus);
334                 if (ret < 0)
335                         return ret;
336                 skl->skl_sst->fw_loaded = false;
337         }
338 
339         return 0;
340 }
341 
342 static int skl_resume(struct device *dev)
343 {
344         struct pci_dev *pci = to_pci_dev(dev);
345         struct hdac_bus *bus = pci_get_drvdata(pci);
346         struct skl *skl  = bus_to_skl(bus);
347         struct hdac_ext_link *hlink = NULL;
348         int ret;
349 
350         /*
351          * resume only when we are not in suspend active, otherwise need to
352          * restore the device
353          */
354         if (skl->supend_active) {
355                 pci_restore_state(pci);
356                 snd_hdac_ext_bus_link_power_up_all(bus);
357                 disable_irq_wake(bus->irq);
358                 /*
359                  * turn On the links which are On before active suspend
360                  * and start the CORB/RIRB DMA if On before
361                  * active suspend.
362                  */
363                 list_for_each_entry(hlink, &bus->hlink_list, list) {
364                         if (hlink->ref_count)
365                                 snd_hdac_ext_bus_link_power_up(hlink);
366                 }
367 
368                 ret = 0;
369                 if (bus->cmd_dma_state)
370                         snd_hdac_bus_init_cmd_io(bus);
371         } else {
372                 ret = _skl_resume(bus);
373 
374                 /* turn off the links which are off before suspend */
375                 list_for_each_entry(hlink, &bus->hlink_list, list) {
376                         if (!hlink->ref_count)
377                                 snd_hdac_ext_bus_link_power_down(hlink);
378                 }
379 
380                 if (!bus->cmd_dma_state)
381                         snd_hdac_bus_stop_cmd_io(bus);
382         }
383 
384         return ret;
385 }
386 #endif /* CONFIG_PM_SLEEP */
387 
388 #ifdef CONFIG_PM
389 static int skl_runtime_suspend(struct device *dev)
390 {
391         struct pci_dev *pci = to_pci_dev(dev);
392         struct hdac_bus *bus = pci_get_drvdata(pci);
393 
394         dev_dbg(bus->dev, "in %s\n", __func__);
395 
396         return _skl_suspend(bus);
397 }
398 
399 static int skl_runtime_resume(struct device *dev)
400 {
401         struct pci_dev *pci = to_pci_dev(dev);
402         struct hdac_bus *bus = pci_get_drvdata(pci);
403 
404         dev_dbg(bus->dev, "in %s\n", __func__);
405 
406         return _skl_resume(bus);
407 }
408 #endif /* CONFIG_PM */
409 
410 static const struct dev_pm_ops skl_pm = {
411         SET_SYSTEM_SLEEP_PM_OPS(skl_suspend, skl_resume)
412         SET_RUNTIME_PM_OPS(skl_runtime_suspend, skl_runtime_resume, NULL)
413         .suspend_late = skl_suspend_late,
414 };
415 
416 /*
417  * destructor
418  */
419 static int skl_free(struct hdac_bus *bus)
420 {
421         struct skl *skl  = bus_to_skl(bus);
422 
423         skl->init_done = 0; /* to be sure */
424 
425         snd_hdac_ext_stop_streams(bus);
426 
427         if (bus->irq >= 0)
428                 free_irq(bus->irq, (void *)bus);
429         snd_hdac_bus_free_stream_pages(bus);
430         snd_hdac_stream_free_all(bus);
431         snd_hdac_link_free_all(bus);
432 
433         if (bus->remap_addr)
434                 iounmap(bus->remap_addr);
435 
436         pci_release_regions(skl->pci);
437         pci_disable_device(skl->pci);
438 
439         snd_hdac_ext_bus_exit(bus);
440 
441         cancel_work_sync(&skl->probe_work);
442         if (IS_ENABLED(CONFIG_SND_SOC_HDAC_HDMI)) {
443                 snd_hdac_display_power(bus, HDA_CODEC_IDX_CONTROLLER, false);
444                 snd_hdac_i915_exit(bus);
445         }
446 
447         return 0;
448 }
449 
450 /*
451  * For each ssp there are 3 clocks (mclk/sclk/sclkfs).
452  * e.g. for ssp0, clocks will be named as
453  *      "ssp0_mclk", "ssp0_sclk", "ssp0_sclkfs"
454  * So for skl+, there are 6 ssps, so 18 clocks will be created.
455  */
456 static struct skl_ssp_clk skl_ssp_clks[] = {
457         {.name = "ssp0_mclk"}, {.name = "ssp1_mclk"}, {.name = "ssp2_mclk"},
458         {.name = "ssp3_mclk"}, {.name = "ssp4_mclk"}, {.name = "ssp5_mclk"},
459         {.name = "ssp0_sclk"}, {.name = "ssp1_sclk"}, {.name = "ssp2_sclk"},
460         {.name = "ssp3_sclk"}, {.name = "ssp4_sclk"}, {.name = "ssp5_sclk"},
461         {.name = "ssp0_sclkfs"}, {.name = "ssp1_sclkfs"},
462                                                 {.name = "ssp2_sclkfs"},
463         {.name = "ssp3_sclkfs"}, {.name = "ssp4_sclkfs"},
464                                                 {.name = "ssp5_sclkfs"},
465 };
466 
467 static struct snd_soc_acpi_mach *skl_find_hda_machine(struct skl *skl,
468                                         struct snd_soc_acpi_mach *machines)
469 {
470         struct hdac_bus *bus = skl_to_bus(skl);
471         struct snd_soc_acpi_mach *mach;
472 
473         /* check if we have any codecs detected on bus */
474         if (bus->codec_mask == 0)
475                 return NULL;
476 
477         /* point to common table */
478         mach = snd_soc_acpi_intel_hda_machines;
479 
480         /* all entries in the machine table use the same firmware */
481         mach->fw_filename = machines->fw_filename;
482 
483         return mach;
484 }
485 
486 static int skl_find_machine(struct skl *skl, void *driver_data)
487 {
488         struct hdac_bus *bus = skl_to_bus(skl);
489         struct snd_soc_acpi_mach *mach = driver_data;
490         struct skl_machine_pdata *pdata;
491 
492         mach = snd_soc_acpi_find_machine(mach);
493         if (!mach) {
494                 dev_dbg(bus->dev, "No matching I2S machine driver found\n");
495                 mach = skl_find_hda_machine(skl, driver_data);
496                 if (!mach) {
497                         dev_err(bus->dev, "No matching machine driver found\n");
498                         return -ENODEV;
499                 }
500         }
501 
502         skl->mach = mach;
503         skl->fw_name = mach->fw_filename;
504         pdata = mach->pdata;
505 
506         if (pdata) {
507                 skl->use_tplg_pcm = pdata->use_tplg_pcm;
508                 mach->mach_params.dmic_num = skl_get_dmic_geo(skl);
509         }
510 
511         return 0;
512 }
513 
514 static int skl_machine_device_register(struct skl *skl)
515 {
516         struct snd_soc_acpi_mach *mach = skl->mach;
517         struct hdac_bus *bus = skl_to_bus(skl);
518         struct platform_device *pdev;
519         int ret;
520 
521         pdev = platform_device_alloc(mach->drv_name, -1);
522         if (pdev == NULL) {
523                 dev_err(bus->dev, "platform device alloc failed\n");
524                 return -EIO;
525         }
526 
527         mach->mach_params.platform = dev_name(bus->dev);
528         mach->mach_params.codec_mask = bus->codec_mask;
529 
530         ret = platform_device_add_data(pdev, (const void *)mach, sizeof(*mach));
531         if (ret) {
532                 dev_err(bus->dev, "failed to add machine device platform data\n");
533                 platform_device_put(pdev);
534                 return ret;
535         }
536 
537         ret = platform_device_add(pdev);
538         if (ret) {
539                 dev_err(bus->dev, "failed to add machine device\n");
540                 platform_device_put(pdev);
541                 return -EIO;
542         }
543 
544 
545         skl->i2s_dev = pdev;
546 
547         return 0;
548 }
549 
550 static void skl_machine_device_unregister(struct skl *skl)
551 {
552         if (skl->i2s_dev)
553                 platform_device_unregister(skl->i2s_dev);
554 }
555 
556 static int skl_dmic_device_register(struct skl *skl)
557 {
558         struct hdac_bus *bus = skl_to_bus(skl);
559         struct platform_device *pdev;
560         int ret;
561 
562         /* SKL has one dmic port, so allocate dmic device for this */
563         pdev = platform_device_alloc("dmic-codec", -1);
564         if (!pdev) {
565                 dev_err(bus->dev, "failed to allocate dmic device\n");
566                 return -ENOMEM;
567         }
568 
569         ret = platform_device_add(pdev);
570         if (ret) {
571                 dev_err(bus->dev, "failed to add dmic device: %d\n", ret);
572                 platform_device_put(pdev);
573                 return ret;
574         }
575         skl->dmic_dev = pdev;
576 
577         return 0;
578 }
579 
580 static void skl_dmic_device_unregister(struct skl *skl)
581 {
582         if (skl->dmic_dev)
583                 platform_device_unregister(skl->dmic_dev);
584 }
585 
586 static struct skl_clk_parent_src skl_clk_src[] = {
587         { .clk_id = SKL_XTAL, .name = "xtal" },
588         { .clk_id = SKL_CARDINAL, .name = "cardinal", .rate = 24576000 },
589         { .clk_id = SKL_PLL, .name = "pll", .rate = 96000000 },
590 };
591 
592 struct skl_clk_parent_src *skl_get_parent_clk(u8 clk_id)
593 {
594         unsigned int i;
595 
596         for (i = 0; i < ARRAY_SIZE(skl_clk_src); i++) {
597                 if (skl_clk_src[i].clk_id == clk_id)
598                         return &skl_clk_src[i];
599         }
600 
601         return NULL;
602 }
603 
604 static void init_skl_xtal_rate(int pci_id)
605 {
606         switch (pci_id) {
607         case 0x9d70:
608         case 0x9d71:
609                 skl_clk_src[0].rate = 24000000;
610                 return;
611 
612         default:
613                 skl_clk_src[0].rate = 19200000;
614                 return;
615         }
616 }
617 
618 static int skl_clock_device_register(struct skl *skl)
619 {
620         struct platform_device_info pdevinfo = {NULL};
621         struct skl_clk_pdata *clk_pdata;
622 
623         clk_pdata = devm_kzalloc(&skl->pci->dev, sizeof(*clk_pdata),
624                                                         GFP_KERNEL);
625         if (!clk_pdata)
626                 return -ENOMEM;
627 
628         init_skl_xtal_rate(skl->pci->device);
629 
630         clk_pdata->parent_clks = skl_clk_src;
631         clk_pdata->ssp_clks = skl_ssp_clks;
632         clk_pdata->num_clks = ARRAY_SIZE(skl_ssp_clks);
633 
634         /* Query NHLT to fill the rates and parent */
635         skl_get_clks(skl, clk_pdata->ssp_clks);
636         clk_pdata->pvt_data = skl;
637 
638         /* Register Platform device */
639         pdevinfo.parent = &skl->pci->dev;
640         pdevinfo.id = -1;
641         pdevinfo.name = "skl-ssp-clk";
642         pdevinfo.data = clk_pdata;
643         pdevinfo.size_data = sizeof(*clk_pdata);
644         skl->clk_dev = platform_device_register_full(&pdevinfo);
645         return PTR_ERR_OR_ZERO(skl->clk_dev);
646 }
647 
648 static void skl_clock_device_unregister(struct skl *skl)
649 {
650         if (skl->clk_dev)
651                 platform_device_unregister(skl->clk_dev);
652 }
653 
654 #if IS_ENABLED(CONFIG_SND_SOC_INTEL_SKYLAKE_HDAUDIO_CODEC)
655 
656 #define IDISP_INTEL_VENDOR_ID   0x80860000
657 
658 /*
659  * load the legacy codec driver
660  */
661 static void load_codec_module(struct hda_codec *codec)
662 {
663 #ifdef MODULE
664         char modalias[MODULE_NAME_LEN];
665         const char *mod = NULL;
666 
667         snd_hdac_codec_modalias(&codec->core, modalias, sizeof(modalias));
668         mod = modalias;
669         dev_dbg(&codec->core.dev, "loading %s codec module\n", mod);
670         request_module(mod);
671 #endif
672 }
673 
674 #endif /* CONFIG_SND_SOC_INTEL_SKYLAKE_HDAUDIO_CODEC */
675 
676 /*
677  * Probe the given codec address
678  */
679 static int probe_codec(struct hdac_bus *bus, int addr)
680 {
681         unsigned int cmd = (addr << 28) | (AC_NODE_ROOT << 20) |
682                 (AC_VERB_PARAMETERS << 8) | AC_PAR_VENDOR_ID;
683         unsigned int res = -1;
684         struct skl *skl = bus_to_skl(bus);
685 #if IS_ENABLED(CONFIG_SND_SOC_INTEL_SKYLAKE_HDAUDIO_CODEC)
686         struct hdac_hda_priv *hda_codec;
687         int err;
688 #endif
689         struct hdac_device *hdev;
690 
691         mutex_lock(&bus->cmd_mutex);
692         snd_hdac_bus_send_cmd(bus, cmd);
693         snd_hdac_bus_get_response(bus, addr, &res);
694         mutex_unlock(&bus->cmd_mutex);
695         if (res == -1)
696                 return -EIO;
697         dev_dbg(bus->dev, "codec #%d probed OK: %x\n", addr, res);
698 
699 #if IS_ENABLED(CONFIG_SND_SOC_INTEL_SKYLAKE_HDAUDIO_CODEC)
700         hda_codec = devm_kzalloc(&skl->pci->dev, sizeof(*hda_codec),
701                                  GFP_KERNEL);
702         if (!hda_codec)
703                 return -ENOMEM;
704 
705         hda_codec->codec.bus = skl_to_hbus(skl);
706         hdev = &hda_codec->codec.core;
707 
708         err = snd_hdac_ext_bus_device_init(bus, addr, hdev);
709         if (err < 0)
710                 return err;
711 
712         /* use legacy bus only for HDA codecs, idisp uses ext bus */
713         if ((res & 0xFFFF0000) != IDISP_INTEL_VENDOR_ID) {
714                 hdev->type = HDA_DEV_LEGACY;
715                 load_codec_module(&hda_codec->codec);
716         }
717         return 0;
718 #else
719         hdev = devm_kzalloc(&skl->pci->dev, sizeof(*hdev), GFP_KERNEL);
720         if (!hdev)
721                 return -ENOMEM;
722 
723         return snd_hdac_ext_bus_device_init(bus, addr, hdev);
724 #endif /* CONFIG_SND_SOC_INTEL_SKYLAKE_HDAUDIO_CODEC */
725 }
726 
727 /* Codec initialization */
728 static void skl_codec_create(struct hdac_bus *bus)
729 {
730         int c, max_slots;
731 
732         max_slots = HDA_MAX_CODECS;
733 
734         /* First try to probe all given codec slots */
735         for (c = 0; c < max_slots; c++) {
736                 if ((bus->codec_mask & (1 << c))) {
737                         if (probe_codec(bus, c) < 0) {
738                                 /*
739                                  * Some BIOSen give you wrong codec addresses
740                                  * that don't exist
741                                  */
742                                 dev_warn(bus->dev,
743                                          "Codec #%d probe error; disabling it...\n", c);
744                                 bus->codec_mask &= ~(1 << c);
745                                 /*
746                                  * More badly, accessing to a non-existing
747                                  * codec often screws up the controller bus,
748                                  * and disturbs the further communications.
749                                  * Thus if an error occurs during probing,
750                                  * better to reset the controller bus to get
751                                  * back to the sanity state.
752                                  */
753                                 snd_hdac_bus_stop_chip(bus);
754                                 skl_init_chip(bus, true);
755                         }
756                 }
757         }
758 }
759 
760 static const struct hdac_bus_ops bus_core_ops = {
761         .command = snd_hdac_bus_send_cmd,
762         .get_response = snd_hdac_bus_get_response,
763 };
764 
765 static int skl_i915_init(struct hdac_bus *bus)
766 {
767         int err;
768 
769         /*
770          * The HDMI codec is in GPU so we need to ensure that it is powered
771          * up and ready for probe
772          */
773         err = snd_hdac_i915_init(bus);
774         if (err < 0)
775                 return err;
776 
777         snd_hdac_display_power(bus, HDA_CODEC_IDX_CONTROLLER, true);
778 
779         return 0;
780 }
781 
782 static void skl_probe_work(struct work_struct *work)
783 {
784         struct skl *skl = container_of(work, struct skl, probe_work);
785         struct hdac_bus *bus = skl_to_bus(skl);
786         struct hdac_ext_link *hlink = NULL;
787         int err;
788 
789         if (IS_ENABLED(CONFIG_SND_SOC_HDAC_HDMI)) {
790                 err = skl_i915_init(bus);
791                 if (err < 0)
792                         return;
793         }
794 
795         err = skl_init_chip(bus, true);
796         if (err < 0) {
797                 dev_err(bus->dev, "Init chip failed with err: %d\n", err);
798                 goto out_err;
799         }
800 
801         /* codec detection */
802         if (!bus->codec_mask)
803                 dev_info(bus->dev, "no hda codecs found!\n");
804 
805         /* create codec instances */
806         skl_codec_create(bus);
807 
808         /* register platform dai and controls */
809         err = skl_platform_register(bus->dev);
810         if (err < 0) {
811                 dev_err(bus->dev, "platform register failed: %d\n", err);
812                 goto out_err;
813         }
814 
815         err = skl_machine_device_register(skl);
816         if (err < 0) {
817                 dev_err(bus->dev, "machine register failed: %d\n", err);
818                 goto out_err;
819         }
820 
821         /*
822          * we are done probing so decrement link counts
823          */
824         list_for_each_entry(hlink, &bus->hlink_list, list)
825                 snd_hdac_ext_bus_link_put(bus, hlink);
826 
827         if (IS_ENABLED(CONFIG_SND_SOC_HDAC_HDMI))
828                 snd_hdac_display_power(bus, HDA_CODEC_IDX_CONTROLLER, false);
829 
830         /* configure PM */
831         pm_runtime_put_noidle(bus->dev);
832         pm_runtime_allow(bus->dev);
833         skl->init_done = 1;
834 
835         return;
836 
837 out_err:
838         if (IS_ENABLED(CONFIG_SND_SOC_HDAC_HDMI))
839                 snd_hdac_display_power(bus, HDA_CODEC_IDX_CONTROLLER, false);
840 }
841 
842 /*
843  * constructor
844  */
845 static int skl_create(struct pci_dev *pci,
846                       const struct hdac_io_ops *io_ops,
847                       struct skl **rskl)
848 {
849         struct hdac_ext_bus_ops *ext_ops = NULL;
850         struct skl *skl;
851         struct hdac_bus *bus;
852         struct hda_bus *hbus;
853         int err;
854 
855         *rskl = NULL;
856 
857         err = pci_enable_device(pci);
858         if (err < 0)
859                 return err;
860 
861         skl = devm_kzalloc(&pci->dev, sizeof(*skl), GFP_KERNEL);
862         if (!skl) {
863                 pci_disable_device(pci);
864                 return -ENOMEM;
865         }
866 
867         hbus = skl_to_hbus(skl);
868         bus = skl_to_bus(skl);
869 
870 #if IS_ENABLED(CONFIG_SND_SOC_INTEL_SKYLAKE_HDAUDIO_CODEC)
871         ext_ops = snd_soc_hdac_hda_get_ops();
872 #endif
873         snd_hdac_ext_bus_init(bus, &pci->dev, &bus_core_ops, io_ops, ext_ops);
874         bus->use_posbuf = 1;
875         skl->pci = pci;
876         INIT_WORK(&skl->probe_work, skl_probe_work);
877         bus->bdl_pos_adj = 0;
878 
879         mutex_init(&hbus->prepare_mutex);
880         hbus->pci = pci;
881         hbus->mixer_assigned = -1;
882         hbus->modelname = "sklbus";
883 
884         *rskl = skl;
885 
886         return 0;
887 }
888 
889 static int skl_first_init(struct hdac_bus *bus)
890 {
891         struct skl *skl = bus_to_skl(bus);
892         struct pci_dev *pci = skl->pci;
893         int err;
894         unsigned short gcap;
895         int cp_streams, pb_streams, start_idx;
896 
897         err = pci_request_regions(pci, "Skylake HD audio");
898         if (err < 0)
899                 return err;
900 
901         bus->addr = pci_resource_start(pci, 0);
902         bus->remap_addr = pci_ioremap_bar(pci, 0);
903         if (bus->remap_addr == NULL) {
904                 dev_err(bus->dev, "ioremap error\n");
905                 return -ENXIO;
906         }
907 
908         snd_hdac_bus_reset_link(bus, true);
909 
910         snd_hdac_bus_parse_capabilities(bus);
911 
912         /* check if PPCAP exists */
913         if (!bus->ppcap) {
914                 dev_err(bus->dev, "bus ppcap not set, HDaudio or DSP not present?\n");
915                 return -ENODEV;
916         }
917 
918         if (skl_acquire_irq(bus, 0) < 0)
919                 return -EBUSY;
920 
921         pci_set_master(pci);
922         synchronize_irq(bus->irq);
923 
924         gcap = snd_hdac_chip_readw(bus, GCAP);
925         dev_dbg(bus->dev, "chipset global capabilities = 0x%x\n", gcap);
926 
927         /* read number of streams from GCAP register */
928         cp_streams = (gcap >> 8) & 0x0f;
929         pb_streams = (gcap >> 12) & 0x0f;
930 
931         if (!pb_streams && !cp_streams) {
932                 dev_err(bus->dev, "no streams found in GCAP definitions?\n");
933                 return -EIO;
934         }
935 
936         bus->num_streams = cp_streams + pb_streams;
937 
938         /* allow 64bit DMA address if supported by H/W */
939         if (!dma_set_mask(bus->dev, DMA_BIT_MASK(64))) {
940                 dma_set_coherent_mask(bus->dev, DMA_BIT_MASK(64));
941         } else {
942                 dma_set_mask(bus->dev, DMA_BIT_MASK(32));
943                 dma_set_coherent_mask(bus->dev, DMA_BIT_MASK(32));
944         }
945 
946         /* initialize streams */
947         snd_hdac_ext_stream_init_all
948                 (bus, 0, cp_streams, SNDRV_PCM_STREAM_CAPTURE);
949         start_idx = cp_streams;
950         snd_hdac_ext_stream_init_all
951                 (bus, start_idx, pb_streams, SNDRV_PCM_STREAM_PLAYBACK);
952 
953         err = snd_hdac_bus_alloc_stream_pages(bus);
954         if (err < 0)
955                 return err;
956 
957         /* initialize chip */
958         skl_init_pci(skl);
959 
960         return skl_init_chip(bus, true);
961 }
962 
963 static int skl_probe(struct pci_dev *pci,
964                      const struct pci_device_id *pci_id)
965 {
966         struct skl *skl;
967         struct hdac_bus *bus = NULL;
968         int err;
969 
970         switch (skl_pci_binding) {
971         case SND_SKL_PCI_BIND_AUTO:
972                 /*
973                  * detect DSP by checking class/subclass/prog-id information
974                  * class=04 subclass 03 prog-if 00: no DSP, use legacy driver
975                  * class=04 subclass 01 prog-if 00: DSP is present
976                  *   (and may be required e.g. for DMIC or SSP support)
977                  * class=04 subclass 03 prog-if 80: use DSP or legacy mode
978                  */
979                 if (pci->class == 0x040300) {
980                         dev_info(&pci->dev, "The DSP is not enabled on this platform, aborting probe\n");
981                         return -ENODEV;
982                 }
983                 if (pci->class != 0x040100 && pci->class != 0x040380) {
984                         dev_err(&pci->dev, "Unknown PCI class/subclass/prog-if information (0x%06x) found, aborting probe\n", pci->class);
985                         return -ENODEV;
986                 }
987                 dev_info(&pci->dev, "DSP detected with PCI class/subclass/prog-if info 0x%06x\n", pci->class);
988                 break;
989         case SND_SKL_PCI_BIND_LEGACY:
990                 dev_info(&pci->dev, "Module parameter forced binding with HDaudio legacy, aborting probe\n");
991                 return -ENODEV;
992         case SND_SKL_PCI_BIND_ASOC:
993                 dev_info(&pci->dev, "Module parameter forced binding with SKL driver, bypassed detection logic\n");
994                 break;
995         default:
996                 dev_err(&pci->dev, "invalid value for skl_pci_binding module parameter, ignored\n");
997                 break;
998         }
999 
1000         /* we use ext core ops, so provide NULL for ops here */
1001         err = skl_create(pci, NULL, &skl);
1002         if (err < 0)
1003                 return err;
1004 
1005         bus = skl_to_bus(skl);
1006 
1007         err = skl_first_init(bus);
1008         if (err < 0) {
1009                 dev_err(bus->dev, "skl_first_init failed with err: %d\n", err);
1010                 goto out_free;
1011         }
1012 
1013         skl->pci_id = pci->device;
1014 
1015         device_disable_async_suspend(bus->dev);
1016 
1017         skl->nhlt = skl_nhlt_init(bus->dev);
1018 
1019         if (skl->nhlt == NULL) {
1020 #if !IS_ENABLED(CONFIG_SND_SOC_INTEL_SKYLAKE_HDAUDIO_CODEC)
1021                 dev_err(bus->dev, "no nhlt info found\n");
1022                 err = -ENODEV;
1023                 goto out_free;
1024 #else
1025                 dev_warn(bus->dev, "no nhlt info found, continuing to try to enable HDaudio codec\n");
1026 #endif
1027         } else {
1028 
1029                 err = skl_nhlt_create_sysfs(skl);
1030                 if (err < 0) {
1031                         dev_err(bus->dev, "skl_nhlt_create_sysfs failed with err: %d\n", err);
1032                         goto out_nhlt_free;
1033                 }
1034 
1035                 skl_nhlt_update_topology_bin(skl);
1036 
1037                 /* create device for dsp clk */
1038                 err = skl_clock_device_register(skl);
1039                 if (err < 0) {
1040                         dev_err(bus->dev, "skl_clock_device_register failed with err: %d\n", err);
1041                         goto out_clk_free;
1042                 }
1043         }
1044 
1045         pci_set_drvdata(skl->pci, bus);
1046 
1047 
1048         err = skl_find_machine(skl, (void *)pci_id->driver_data);
1049         if (err < 0) {
1050                 dev_err(bus->dev, "skl_find_machine failed with err: %d\n", err);
1051                 goto out_nhlt_free;
1052         }
1053 
1054         err = skl_init_dsp(skl);
1055         if (err < 0) {
1056                 dev_dbg(bus->dev, "error failed to register dsp\n");
1057                 goto out_nhlt_free;
1058         }
1059         skl->skl_sst->enable_miscbdcge = skl_enable_miscbdcge;
1060         skl->skl_sst->clock_power_gating = skl_clock_power_gating;
1061 
1062         if (bus->mlcap)
1063                 snd_hdac_ext_bus_get_ml_capabilities(bus);
1064 
1065         snd_hdac_bus_stop_chip(bus);
1066 
1067         /* create device for soc dmic */
1068         err = skl_dmic_device_register(skl);
1069         if (err < 0) {
1070                 dev_err(bus->dev, "skl_dmic_device_register failed with err: %d\n", err);
1071                 goto out_dsp_free;
1072         }
1073 
1074         schedule_work(&skl->probe_work);
1075 
1076         return 0;
1077 
1078 out_dsp_free:
1079         skl_free_dsp(skl);
1080 out_clk_free:
1081         skl_clock_device_unregister(skl);
1082 out_nhlt_free:
1083         skl_nhlt_free(skl->nhlt);
1084 out_free:
1085         skl_free(bus);
1086 
1087         return err;
1088 }
1089 
1090 static void skl_shutdown(struct pci_dev *pci)
1091 {
1092         struct hdac_bus *bus = pci_get_drvdata(pci);
1093         struct hdac_stream *s;
1094         struct hdac_ext_stream *stream;
1095         struct skl *skl;
1096 
1097         if (!bus)
1098                 return;
1099 
1100         skl = bus_to_skl(bus);
1101 
1102         if (!skl->init_done)
1103                 return;
1104 
1105         snd_hdac_ext_stop_streams(bus);
1106         list_for_each_entry(s, &bus->stream_list, list) {
1107                 stream = stream_to_hdac_ext_stream(s);
1108                 snd_hdac_ext_stream_decouple(bus, stream, false);
1109         }
1110 
1111         snd_hdac_bus_stop_chip(bus);
1112 }
1113 
1114 static void skl_remove(struct pci_dev *pci)
1115 {
1116         struct hdac_bus *bus = pci_get_drvdata(pci);
1117         struct skl *skl = bus_to_skl(bus);
1118 
1119         release_firmware(skl->tplg);
1120 
1121         pm_runtime_get_noresume(&pci->dev);
1122 
1123         /* codec removal, invoke bus_device_remove */
1124         snd_hdac_ext_bus_device_remove(bus);
1125 
1126         skl->debugfs = NULL;
1127         skl_platform_unregister(&pci->dev);
1128         skl_free_dsp(skl);
1129         skl_machine_device_unregister(skl);
1130         skl_dmic_device_unregister(skl);
1131         skl_clock_device_unregister(skl);
1132         skl_nhlt_remove_sysfs(skl);
1133         skl_nhlt_free(skl->nhlt);
1134         skl_free(bus);
1135         dev_set_drvdata(&pci->dev, NULL);
1136 }
1137 
1138 /* PCI IDs */
1139 static const struct pci_device_id skl_ids[] = {
1140 #if IS_ENABLED(CONFIG_SND_SOC_INTEL_SKL)
1141         /* Sunrise Point-LP */
1142         { PCI_DEVICE(0x8086, 0x9d70),
1143                 .driver_data = (unsigned long)&snd_soc_acpi_intel_skl_machines},
1144 #endif
1145 #if IS_ENABLED(CONFIG_SND_SOC_INTEL_APL)
1146         /* BXT-P */
1147         { PCI_DEVICE(0x8086, 0x5a98),
1148                 .driver_data = (unsigned long)&snd_soc_acpi_intel_bxt_machines},
1149 #endif
1150 #if IS_ENABLED(CONFIG_SND_SOC_INTEL_KBL)
1151         /* KBL */
1152         { PCI_DEVICE(0x8086, 0x9D71),
1153                 .driver_data = (unsigned long)&snd_soc_acpi_intel_kbl_machines},
1154 #endif
1155 #if IS_ENABLED(CONFIG_SND_SOC_INTEL_GLK)
1156         /* GLK */
1157         { PCI_DEVICE(0x8086, 0x3198),
1158                 .driver_data = (unsigned long)&snd_soc_acpi_intel_glk_machines},
1159 #endif
1160 #if IS_ENABLED(CONFIG_SND_SOC_INTEL_CNL)
1161         /* CNL */
1162         { PCI_DEVICE(0x8086, 0x9dc8),
1163                 .driver_data = (unsigned long)&snd_soc_acpi_intel_cnl_machines},
1164 #endif
1165 #if IS_ENABLED(CONFIG_SND_SOC_INTEL_CFL)
1166         /* CFL */
1167         { PCI_DEVICE(0x8086, 0xa348),
1168                 .driver_data = (unsigned long)&snd_soc_acpi_intel_cnl_machines},
1169 #endif
1170         { 0, }
1171 };
1172 MODULE_DEVICE_TABLE(pci, skl_ids);
1173 
1174 /* pci_driver definition */
1175 static struct pci_driver skl_driver = {
1176         .name = KBUILD_MODNAME,
1177         .id_table = skl_ids,
1178         .probe = skl_probe,
1179         .remove = skl_remove,
1180         .shutdown = skl_shutdown,
1181         .driver = {
1182                 .pm = &skl_pm,
1183         },
1184 };
1185 module_pci_driver(skl_driver);
1186 
1187 MODULE_LICENSE("GPL v2");
1188 MODULE_DESCRIPTION("Intel Skylake ASoC HDA driver");
1189 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp