287 lines
7.7 KiB
C
287 lines
7.7 KiB
C
/*
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* Intel SST loader on ACPI systems
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*
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* Copyright (C) 2013, Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License version
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* 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <linux/acpi.h>
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#include <linux/device.h>
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#include <linux/firmware.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include "sst-dsp.h"
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#define SST_LPT_DSP_DMA_ADDR_OFFSET 0x0F0000
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#define SST_WPT_DSP_DMA_ADDR_OFFSET 0x0FE000
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#define SST_LPT_DSP_DMA_SIZE (1024 - 1)
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/* Descriptor for SST ASoC machine driver */
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struct sst_acpi_mach {
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/* ACPI ID for the matching machine driver. Audio codec for instance */
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const u8 id[ACPI_ID_LEN];
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/* machine driver name */
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const char *drv_name;
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/* firmware file name */
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const char *fw_filename;
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};
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/* Descriptor for setting up SST platform data */
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struct sst_acpi_desc {
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const char *drv_name;
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struct sst_acpi_mach *machines;
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/* Platform resource indexes. Must set to -1 if not used */
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int resindex_lpe_base;
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int resindex_pcicfg_base;
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int resindex_fw_base;
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int irqindex_host_ipc;
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int resindex_dma_base;
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/* Unique number identifying the SST core on platform */
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int sst_id;
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/* DMA only valid when resindex_dma_base != -1*/
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int dma_engine;
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int dma_size;
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};
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struct sst_acpi_priv {
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struct platform_device *pdev_mach;
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struct platform_device *pdev_pcm;
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struct sst_pdata sst_pdata;
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struct sst_acpi_desc *desc;
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struct sst_acpi_mach *mach;
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};
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static void sst_acpi_fw_cb(const struct firmware *fw, void *context)
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{
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struct platform_device *pdev = context;
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struct device *dev = &pdev->dev;
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struct sst_acpi_priv *sst_acpi = platform_get_drvdata(pdev);
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struct sst_pdata *sst_pdata = &sst_acpi->sst_pdata;
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struct sst_acpi_desc *desc = sst_acpi->desc;
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struct sst_acpi_mach *mach = sst_acpi->mach;
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sst_pdata->fw = fw;
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if (!fw) {
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dev_err(dev, "Cannot load firmware %s\n", mach->fw_filename);
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return;
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}
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/* register PCM and DAI driver */
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sst_acpi->pdev_pcm =
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platform_device_register_data(dev, desc->drv_name, -1,
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sst_pdata, sizeof(*sst_pdata));
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if (IS_ERR(sst_acpi->pdev_pcm)) {
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dev_err(dev, "Cannot register device %s. Error %d\n",
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desc->drv_name, (int)PTR_ERR(sst_acpi->pdev_pcm));
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}
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return;
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}
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static acpi_status sst_acpi_mach_match(acpi_handle handle, u32 level,
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void *context, void **ret)
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{
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*(bool *)context = true;
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return AE_OK;
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}
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static struct sst_acpi_mach *sst_acpi_find_machine(
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struct sst_acpi_mach *machines)
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{
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struct sst_acpi_mach *mach;
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bool found = false;
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for (mach = machines; mach->id[0]; mach++)
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if (ACPI_SUCCESS(acpi_get_devices(mach->id,
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sst_acpi_mach_match,
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&found, NULL)) && found)
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return mach;
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return NULL;
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}
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static int sst_acpi_probe(struct platform_device *pdev)
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{
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const struct acpi_device_id *id;
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struct device *dev = &pdev->dev;
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struct sst_acpi_priv *sst_acpi;
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struct sst_pdata *sst_pdata;
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struct sst_acpi_mach *mach;
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struct sst_acpi_desc *desc;
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struct resource *mmio;
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int ret = 0;
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sst_acpi = devm_kzalloc(dev, sizeof(*sst_acpi), GFP_KERNEL);
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if (sst_acpi == NULL)
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return -ENOMEM;
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id = acpi_match_device(dev->driver->acpi_match_table, dev);
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if (!id)
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return -ENODEV;
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desc = (struct sst_acpi_desc *)id->driver_data;
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mach = sst_acpi_find_machine(desc->machines);
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if (mach == NULL) {
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dev_err(dev, "No matching ASoC machine driver found\n");
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return -ENODEV;
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}
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sst_pdata = &sst_acpi->sst_pdata;
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sst_pdata->id = desc->sst_id;
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sst_pdata->dma_dev = dev;
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sst_acpi->desc = desc;
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sst_acpi->mach = mach;
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if (desc->resindex_dma_base >= 0) {
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sst_pdata->dma_engine = desc->dma_engine;
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sst_pdata->dma_base = desc->resindex_dma_base;
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sst_pdata->dma_size = desc->dma_size;
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}
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if (desc->irqindex_host_ipc >= 0)
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sst_pdata->irq = platform_get_irq(pdev, desc->irqindex_host_ipc);
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if (desc->resindex_lpe_base >= 0) {
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mmio = platform_get_resource(pdev, IORESOURCE_MEM,
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desc->resindex_lpe_base);
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if (mmio) {
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sst_pdata->lpe_base = mmio->start;
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sst_pdata->lpe_size = resource_size(mmio);
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}
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}
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if (desc->resindex_pcicfg_base >= 0) {
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mmio = platform_get_resource(pdev, IORESOURCE_MEM,
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desc->resindex_pcicfg_base);
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if (mmio) {
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sst_pdata->pcicfg_base = mmio->start;
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sst_pdata->pcicfg_size = resource_size(mmio);
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}
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}
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if (desc->resindex_fw_base >= 0) {
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mmio = platform_get_resource(pdev, IORESOURCE_MEM,
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desc->resindex_fw_base);
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if (mmio) {
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sst_pdata->fw_base = mmio->start;
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sst_pdata->fw_size = resource_size(mmio);
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}
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}
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platform_set_drvdata(pdev, sst_acpi);
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/* register machine driver */
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sst_acpi->pdev_mach =
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platform_device_register_data(dev, mach->drv_name, -1,
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sst_pdata, sizeof(*sst_pdata));
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if (IS_ERR(sst_acpi->pdev_mach))
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return PTR_ERR(sst_acpi->pdev_mach);
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/* continue SST probing after firmware is loaded */
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ret = request_firmware_nowait(THIS_MODULE, true, mach->fw_filename,
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dev, GFP_KERNEL, pdev, sst_acpi_fw_cb);
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if (ret)
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platform_device_unregister(sst_acpi->pdev_mach);
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return ret;
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}
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static int sst_acpi_remove(struct platform_device *pdev)
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{
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struct sst_acpi_priv *sst_acpi = platform_get_drvdata(pdev);
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struct sst_pdata *sst_pdata = &sst_acpi->sst_pdata;
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platform_device_unregister(sst_acpi->pdev_mach);
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if (!IS_ERR_OR_NULL(sst_acpi->pdev_pcm))
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platform_device_unregister(sst_acpi->pdev_pcm);
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release_firmware(sst_pdata->fw);
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return 0;
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}
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static struct sst_acpi_mach haswell_machines[] = {
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{ "INT33CA", "haswell-audio", "intel/IntcSST1.bin" },
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{}
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};
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static struct sst_acpi_desc sst_acpi_haswell_desc = {
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.drv_name = "haswell-pcm-audio",
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.machines = haswell_machines,
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.resindex_lpe_base = 0,
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.resindex_pcicfg_base = 1,
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.resindex_fw_base = -1,
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.irqindex_host_ipc = 0,
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.sst_id = SST_DEV_ID_LYNX_POINT,
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.dma_engine = SST_DMA_TYPE_DW,
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.resindex_dma_base = SST_LPT_DSP_DMA_ADDR_OFFSET,
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.dma_size = SST_LPT_DSP_DMA_SIZE,
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};
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static struct sst_acpi_mach broadwell_machines[] = {
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{ "INT343A", "broadwell-audio", "intel/IntcSST2.bin" },
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{}
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};
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static struct sst_acpi_desc sst_acpi_broadwell_desc = {
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.drv_name = "haswell-pcm-audio",
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.machines = broadwell_machines,
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.resindex_lpe_base = 0,
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.resindex_pcicfg_base = 1,
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.resindex_fw_base = -1,
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.irqindex_host_ipc = 0,
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.sst_id = SST_DEV_ID_WILDCAT_POINT,
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.dma_engine = SST_DMA_TYPE_DW,
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.resindex_dma_base = SST_WPT_DSP_DMA_ADDR_OFFSET,
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.dma_size = SST_LPT_DSP_DMA_SIZE,
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};
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static struct sst_acpi_mach baytrail_machines[] = {
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{ "10EC5640", "byt-rt5640", "intel/fw_sst_0f28.bin-48kHz_i2s_master" },
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{ "193C9890", "byt-max98090", "intel/fw_sst_0f28.bin-48kHz_i2s_master" },
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{}
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};
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static struct sst_acpi_desc sst_acpi_baytrail_desc = {
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.drv_name = "baytrail-pcm-audio",
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.machines = baytrail_machines,
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.resindex_lpe_base = 0,
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.resindex_pcicfg_base = 1,
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.resindex_fw_base = 2,
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.irqindex_host_ipc = 5,
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.sst_id = SST_DEV_ID_BYT,
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.resindex_dma_base = -1,
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};
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static struct acpi_device_id sst_acpi_match[] = {
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{ "INT33C8", (unsigned long)&sst_acpi_haswell_desc },
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{ "INT3438", (unsigned long)&sst_acpi_broadwell_desc },
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{ "80860F28", (unsigned long)&sst_acpi_baytrail_desc },
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{ }
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};
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MODULE_DEVICE_TABLE(acpi, sst_acpi_match);
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static struct platform_driver sst_acpi_driver = {
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.probe = sst_acpi_probe,
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.remove = sst_acpi_remove,
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.driver = {
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.name = "sst-acpi",
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.owner = THIS_MODULE,
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.acpi_match_table = ACPI_PTR(sst_acpi_match),
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},
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};
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module_platform_driver(sst_acpi_driver);
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MODULE_AUTHOR("Jarkko Nikula <jarkko.nikula@linux.intel.com>");
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MODULE_DESCRIPTION("Intel SST loader on ACPI systems");
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MODULE_LICENSE("GPL v2");
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