sound/soc/sof/sof-pci-dev.c

   1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
   2 //
   3 // This file is provided under a dual BSD/GPLv2 license.  When using or
   4 // redistributing this file, you may do so under either license.
   5 //
   6 // Copyright(c) 2018 Intel Corporation. All rights reserved.
   7 //
   8 // Author: Liam Girdwood <liam.r.girdwood@linux.intel.com>
   9 //
  10
  11 #include <linux/firmware.h>
  12 #include <linux/dmi.h>
  13 #include <linux/module.h>
  14 #include <linux/pci.h>
  15 #include <linux/pm_runtime.h>
  16 #include <sound/soc-acpi.h>
  17 #include <sound/soc-acpi-intel-match.h>
  18 #include <sound/sof.h>
  19 #include "ops.h"
  20 #include "sof-pci-dev.h"
  21
  22 static char *fw_path;
  23 module_param(fw_path, charp, 0444);
  24 MODULE_PARM_DESC(fw_path, "alternate path for SOF firmware.");
  25
  26 static char *tplg_path;
  27 module_param(tplg_path, charp, 0444);
  28 MODULE_PARM_DESC(tplg_path, "alternate path for SOF topology.");
  29
  30 static int sof_pci_debug;
  31 module_param_named(sof_pci_debug, sof_pci_debug, int, 0444);
  32 MODULE_PARM_DESC(sof_pci_debug, "SOF PCI debug options (0x0 all off)");
  33
  34 static const char *sof_override_tplg_name;
  35
  36 #define SOF_PCI_DISABLE_PM_RUNTIME BIT(0)
  37
  38 static int sof_tplg_cb(const struct dmi_system_id *id)
  39 {
  40         sof_override_tplg_name = id->driver_data;
  41         return 1;
  42 }
  43
  44 static const struct dmi_system_id sof_tplg_table[] = {
  45         {
  46                 .callback = sof_tplg_cb,
  47                 .matches = {
  48                         DMI_MATCH(DMI_PRODUCT_FAMILY, "Google_Volteer"),
  49                         DMI_MATCH(DMI_OEM_STRING, "AUDIO-MAX98373_ALC5682I_I2S_UP4"),
  50                 },
  51                 .driver_data = "sof-tgl-rt5682-ssp0-max98373-ssp2.tplg",
  52         },
  53         {}
  54 };
  55
  56 static const struct dmi_system_id community_key_platforms[] = {
  57         {
  58                 .ident = "Up Squared",
  59                 .matches = {
  60                         DMI_MATCH(DMI_SYS_VENDOR, "AAEON"),
  61                         DMI_MATCH(DMI_BOARD_NAME, "UP-APL01"),
  62                 }
  63         },
  64         {
  65                 .ident = "Up Extreme",
  66                 .matches = {
  67                         DMI_MATCH(DMI_SYS_VENDOR, "AAEON"),
  68                         DMI_MATCH(DMI_BOARD_NAME, "UP-WHL01"),
  69                 }
  70         },
  71         {
  72                 .ident = "Google Chromebooks",
  73                 .matches = {
  74                         DMI_MATCH(DMI_SYS_VENDOR, "Google"),
  75                 }
  76         },
  77         {},
  78 };
  79
  80 const struct dev_pm_ops sof_pci_pm = {
  81         .prepare = snd_sof_prepare,
  82         .complete = snd_sof_complete,
  83         SET_SYSTEM_SLEEP_PM_OPS(snd_sof_suspend, snd_sof_resume)
  84         SET_RUNTIME_PM_OPS(snd_sof_runtime_suspend, snd_sof_runtime_resume,
  85                            snd_sof_runtime_idle)
  86 };
  87 EXPORT_SYMBOL_NS(sof_pci_pm, SND_SOC_SOF_PCI_DEV);
  88
  89 static void sof_pci_probe_complete(struct device *dev)
  90 {
  91         dev_dbg(dev, "Completing SOF PCI probe");
  92
  93         if (sof_pci_debug & SOF_PCI_DISABLE_PM_RUNTIME)
  94                 return;
  95
  96         /* allow runtime_pm */
  97         pm_runtime_set_autosuspend_delay(dev, SND_SOF_SUSPEND_DELAY_MS);
  98         pm_runtime_use_autosuspend(dev);
  99
 100         /*
 101          * runtime pm for pci device is "forbidden" by default.
 102          * so call pm_runtime_allow() to enable it.
 103          */
 104         pm_runtime_allow(dev);
 105
 106         /* mark last_busy for pm_runtime to make sure not suspend immediately */
 107         pm_runtime_mark_last_busy(dev);
 108
 109         /* follow recommendation in pci-driver.c to decrement usage counter */
 110         pm_runtime_put_noidle(dev);
 111 }
 112
 113 int sof_pci_probe(struct pci_dev *pci, const struct pci_device_id *pci_id)
 114 {
 115         struct device *dev = &pci->dev;
 116         const struct sof_dev_desc *desc =
 117                 (const struct sof_dev_desc *)pci_id->driver_data;
 118         struct snd_sof_pdata *sof_pdata;
 119         int ret;
 120
 121         dev_dbg(&pci->dev, "PCI DSP detected");
 122
 123         if (!desc->ops) {
 124                 dev_err(dev, "error: no matching PCI descriptor ops\n");
 125                 return -ENODEV;
 126         }
 127
 128         sof_pdata = devm_kzalloc(dev, sizeof(*sof_pdata), GFP_KERNEL);
 129         if (!sof_pdata)
 130                 return -ENOMEM;
 131
 132         ret = pcim_enable_device(pci);
 133         if (ret < 0)
 134                 return ret;
 135
 136         ret = pci_request_regions(pci, "Audio DSP");
 137         if (ret < 0)
 138                 return ret;
 139
 140         sof_pdata->name = pci_name(pci);
 141         sof_pdata->desc = desc;
 142         sof_pdata->dev = dev;
 143         sof_pdata->fw_filename = desc->default_fw_filename;
 144
 145         /*
 146          * for platforms using the SOF community key, change the
 147          * default path automatically to pick the right files from the
 148          * linux-firmware tree. This can be overridden with the
 149          * fw_path kernel parameter, e.g. for developers.
 150          */
 151
 152         /* alternate fw and tplg filenames ? */
 153         if (fw_path) {
 154                 sof_pdata->fw_filename_prefix = fw_path;
 155
 156                 dev_dbg(dev,
 157                         "Module parameter used, changed fw path to %s\n",
 158                         sof_pdata->fw_filename_prefix);
 159
 160         } else if (dmi_check_system(community_key_platforms)) {
 161                 sof_pdata->fw_filename_prefix =
 162                         devm_kasprintf(dev, GFP_KERNEL, "%s/%s",
 163                                        sof_pdata->desc->default_fw_path,
 164                                        "community");
 165
 166                 dev_dbg(dev,
 167                         "Platform uses community key, changed fw path to %s\n",
 168                         sof_pdata->fw_filename_prefix);
 169         } else {
 170                 sof_pdata->fw_filename_prefix =
 171                         sof_pdata->desc->default_fw_path;
 172         }
 173
 174         if (tplg_path)
 175                 sof_pdata->tplg_filename_prefix = tplg_path;
 176         else
 177                 sof_pdata->tplg_filename_prefix =
 178                         sof_pdata->desc->default_tplg_path;
 179
 180         dmi_check_system(sof_tplg_table);
 181         if (sof_override_tplg_name)
 182                 sof_pdata->tplg_filename = sof_override_tplg_name;
 183
 184         /* set callback to be called on successful device probe to enable runtime_pm */
 185         sof_pdata->sof_probe_complete = sof_pci_probe_complete;
 186
 187         /* call sof helper for DSP hardware probe */
 188         ret = snd_sof_device_probe(dev, sof_pdata);
 189         if (ret)
 190                 pci_release_regions(pci);
 191
 192         return ret;
 193 }
 194 EXPORT_SYMBOL_NS(sof_pci_probe, SND_SOC_SOF_PCI_DEV);
 195
 196 void sof_pci_remove(struct pci_dev *pci)
 197 {
 198         /* call sof helper for DSP hardware remove */
 199         snd_sof_device_remove(&pci->dev);
 200
 201         /* follow recommendation in pci-driver.c to increment usage counter */
 202         if (snd_sof_device_probe_completed(&pci->dev) &&
 203             !(sof_pci_debug & SOF_PCI_DISABLE_PM_RUNTIME))
 204                 pm_runtime_get_noresume(&pci->dev);
 205
 206         /* release pci regions and disable device */
 207         pci_release_regions(pci);
 208 }
 209 EXPORT_SYMBOL_NS(sof_pci_remove, SND_SOC_SOF_PCI_DEV);
 210
 211 void sof_pci_shutdown(struct pci_dev *pci)
 212 {
 213         snd_sof_device_shutdown(&pci->dev);
 214 }
 215 EXPORT_SYMBOL_NS(sof_pci_shutdown, SND_SOC_SOF_PCI_DEV);
 216
 217 MODULE_LICENSE("Dual BSD/GPL");