LXR linux/sound/soc/intel/common/sst-acpi.c

   1/*
   2 * Intel SST loader on ACPI systems
   3 *
   4 * Copyright (C) 2013, Intel Corporation. All rights reserved.
   5 *
   6 * This program is free software; you can redistribute it and/or
   7 * modify it under the terms of the GNU General Public License version
   8 * 2 as published by the Free Software Foundation.
   9 *
  10 * This program is distributed in the hope that it will be useful,
  11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 * GNU General Public License for more details.
  14 *
  15 */
  16
  17#include <linux/acpi.h>
  18#include <linux/device.h>
  19#include <linux/firmware.h>
  20#include <linux/module.h>
  21#include <linux/platform_device.h>
  22
  23#include "sst-dsp.h"
  24#include <sound/soc-acpi.h>
  25#include <sound/soc-acpi-intel-match.h>
  26
  27#define SST_LPT_DSP_DMA_ADDR_OFFSET     0x0F0000
  28#define SST_WPT_DSP_DMA_ADDR_OFFSET     0x0FE000
  29#define SST_LPT_DSP_DMA_SIZE            (1024 - 1)
  30
  31/* Descriptor for setting up SST platform data */
  32struct sst_acpi_desc {
  33        const char *drv_name;
  34        struct snd_soc_acpi_mach *machines;
  35        /* Platform resource indexes. Must set to -1 if not used */
  36        int resindex_lpe_base;
  37        int resindex_pcicfg_base;
  38        int resindex_fw_base;
  39        int irqindex_host_ipc;
  40        int resindex_dma_base;
  41        /* Unique number identifying the SST core on platform */
  42        int sst_id;
  43        /* DMA only valid when resindex_dma_base != -1*/
  44        int dma_engine;
  45        int dma_size;
  46};
  47
  48struct sst_acpi_priv {
  49        struct platform_device *pdev_mach;
  50        struct platform_device *pdev_pcm;
  51        struct sst_pdata sst_pdata;
  52        struct sst_acpi_desc *desc;
  53        struct snd_soc_acpi_mach *mach;
  54};
  55
  56static void sst_acpi_fw_cb(const struct firmware *fw, void *context)
  57{
  58        struct platform_device *pdev = context;
  59        struct device *dev = &pdev->dev;
  60        struct sst_acpi_priv *sst_acpi = platform_get_drvdata(pdev);
  61        struct sst_pdata *sst_pdata = &sst_acpi->sst_pdata;
  62        struct sst_acpi_desc *desc = sst_acpi->desc;
  63        struct snd_soc_acpi_mach *mach = sst_acpi->mach;
  64
  65        sst_pdata->fw = fw;
  66        if (!fw) {
  67                dev_err(dev, "Cannot load firmware %s\n", mach->fw_filename);
  68                return;
  69        }
  70
  71        /* register PCM and DAI driver */
  72        sst_acpi->pdev_pcm =
  73                platform_device_register_data(dev, desc->drv_name, -1,
  74                                              sst_pdata, sizeof(*sst_pdata));
  75        if (IS_ERR(sst_acpi->pdev_pcm)) {
  76                dev_err(dev, "Cannot register device %s. Error %d\n",
  77                        desc->drv_name, (int)PTR_ERR(sst_acpi->pdev_pcm));
  78        }
  79
  80        return;
  81}
  82
  83static int sst_acpi_probe(struct platform_device *pdev)
  84{
  85        const struct acpi_device_id *id;
  86        struct device *dev = &pdev->dev;
  87        struct sst_acpi_priv *sst_acpi;
  88        struct sst_pdata *sst_pdata;
  89        struct snd_soc_acpi_mach *mach;
  90        struct sst_acpi_desc *desc;
  91        struct resource *mmio;
  92        int ret = 0;
  93
  94        sst_acpi = devm_kzalloc(dev, sizeof(*sst_acpi), GFP_KERNEL);
  95        if (sst_acpi == NULL)
  96                return -ENOMEM;
  97
  98        id = acpi_match_device(dev->driver->acpi_match_table, dev);
  99        if (!id)
 100                return -ENODEV;
 101
 102        desc = (struct sst_acpi_desc *)id->driver_data;
 103        mach = snd_soc_acpi_find_machine(desc->machines);
 104        if (mach == NULL) {
 105                dev_err(dev, "No matching ASoC machine driver found\n");
 106                return -ENODEV;
 107        }
 108
 109        sst_pdata = &sst_acpi->sst_pdata;
 110        sst_pdata->id = desc->sst_id;
 111        sst_pdata->dma_dev = dev;
 112        sst_acpi->desc = desc;
 113        sst_acpi->mach = mach;
 114
 115        sst_pdata->resindex_dma_base = desc->resindex_dma_base;
 116        if (desc->resindex_dma_base >= 0) {
 117                sst_pdata->dma_engine = desc->dma_engine;
 118                sst_pdata->dma_base = desc->resindex_dma_base;
 119                sst_pdata->dma_size = desc->dma_size;
 120        }
 121
 122        if (desc->irqindex_host_ipc >= 0)
 123                sst_pdata->irq = platform_get_irq(pdev, desc->irqindex_host_ipc);
 124
 125        if (desc->resindex_lpe_base >= 0) {
 126                mmio = platform_get_resource(pdev, IORESOURCE_MEM,
 127                                             desc->resindex_lpe_base);
 128                if (mmio) {
 129                        sst_pdata->lpe_base = mmio->start;
 130                        sst_pdata->lpe_size = resource_size(mmio);
 131                }
 132        }
 133
 134        if (desc->resindex_pcicfg_base >= 0) {
 135                mmio = platform_get_resource(pdev, IORESOURCE_MEM,
 136                                             desc->resindex_pcicfg_base);
 137                if (mmio) {
 138                        sst_pdata->pcicfg_base = mmio->start;
 139                        sst_pdata->pcicfg_size = resource_size(mmio);
 140                }
 141        }
 142
 143        if (desc->resindex_fw_base >= 0) {
 144                mmio = platform_get_resource(pdev, IORESOURCE_MEM,
 145                                             desc->resindex_fw_base);
 146                if (mmio) {
 147                        sst_pdata->fw_base = mmio->start;
 148                        sst_pdata->fw_size = resource_size(mmio);
 149                }
 150        }
 151
 152        platform_set_drvdata(pdev, sst_acpi);
 153
 154        /* register machine driver */
 155        sst_acpi->pdev_mach =
 156                platform_device_register_data(dev, mach->drv_name, -1,
 157                                              sst_pdata, sizeof(*sst_pdata));
 158        if (IS_ERR(sst_acpi->pdev_mach))
 159                return PTR_ERR(sst_acpi->pdev_mach);
 160
 161        /* continue SST probing after firmware is loaded */
 162        ret = request_firmware_nowait(THIS_MODULE, true, mach->fw_filename,
 163                                      dev, GFP_KERNEL, pdev, sst_acpi_fw_cb);
 164        if (ret)
 165                platform_device_unregister(sst_acpi->pdev_mach);
 166
 167        return ret;
 168}
 169
 170static int sst_acpi_remove(struct platform_device *pdev)
 171{
 172        struct sst_acpi_priv *sst_acpi = platform_get_drvdata(pdev);
 173        struct sst_pdata *sst_pdata = &sst_acpi->sst_pdata;
 174
 175        platform_device_unregister(sst_acpi->pdev_mach);
 176        if (!IS_ERR_OR_NULL(sst_acpi->pdev_pcm))
 177                platform_device_unregister(sst_acpi->pdev_pcm);
 178        release_firmware(sst_pdata->fw);
 179
 180        return 0;
 181}
 182
 183static struct sst_acpi_desc sst_acpi_haswell_desc = {
 184        .drv_name = "haswell-pcm-audio",
 185        .machines = snd_soc_acpi_intel_haswell_machines,
 186        .resindex_lpe_base = 0,
 187        .resindex_pcicfg_base = 1,
 188        .resindex_fw_base = -1,
 189        .irqindex_host_ipc = 0,
 190        .sst_id = SST_DEV_ID_LYNX_POINT,
 191        .dma_engine = SST_DMA_TYPE_DW,
 192        .resindex_dma_base = SST_LPT_DSP_DMA_ADDR_OFFSET,
 193        .dma_size = SST_LPT_DSP_DMA_SIZE,
 194};
 195
 196static struct sst_acpi_desc sst_acpi_broadwell_desc = {
 197        .drv_name = "haswell-pcm-audio",
 198        .machines = snd_soc_acpi_intel_broadwell_machines,
 199        .resindex_lpe_base = 0,
 200        .resindex_pcicfg_base = 1,
 201        .resindex_fw_base = -1,
 202        .irqindex_host_ipc = 0,
 203        .sst_id = SST_DEV_ID_WILDCAT_POINT,
 204        .dma_engine = SST_DMA_TYPE_DW,
 205        .resindex_dma_base = SST_WPT_DSP_DMA_ADDR_OFFSET,
 206        .dma_size = SST_LPT_DSP_DMA_SIZE,
 207};
 208
 209#if !IS_ENABLED(CONFIG_SND_SST_IPC_ACPI)
 210static struct sst_acpi_desc sst_acpi_baytrail_desc = {
 211        .drv_name = "baytrail-pcm-audio",
 212        .machines = snd_soc_acpi_intel_baytrail_legacy_machines,
 213        .resindex_lpe_base = 0,
 214        .resindex_pcicfg_base = 1,
 215        .resindex_fw_base = 2,
 216        .irqindex_host_ipc = 5,
 217        .sst_id = SST_DEV_ID_BYT,
 218        .resindex_dma_base = -1,
 219};
 220#endif
 221
 222static const struct acpi_device_id sst_acpi_match[] = {
 223        { "INT33C8", (unsigned long)&sst_acpi_haswell_desc },
 224        { "INT3438", (unsigned long)&sst_acpi_broadwell_desc },
 225#if !IS_ENABLED(CONFIG_SND_SST_IPC_ACPI)
 226        { "80860F28", (unsigned long)&sst_acpi_baytrail_desc },
 227#endif
 228        { }
 229};
 230MODULE_DEVICE_TABLE(acpi, sst_acpi_match);
 231
 232static struct platform_driver sst_acpi_driver = {
 233        .probe = sst_acpi_probe,
 234        .remove = sst_acpi_remove,
 235        .driver = {
 236                .name = "sst-acpi",
 237                .acpi_match_table = ACPI_PTR(sst_acpi_match),
 238        },
 239};
 240module_platform_driver(sst_acpi_driver);
 241
 242MODULE_AUTHOR("Jarkko Nikula <jarkko.nikula@linux.intel.com>");
 243MODULE_DESCRIPTION("Intel SST loader on ACPI systems");
 244MODULE_LICENSE("GPL v2");
 245