/*
* Intel SST loader on ACPI systems
*
* Copyright (C) 2013, Intel Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version
* 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#include <linux/acpi.h>
#include <linux/device.h>
#include <linux/firmware.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include "sst-dsp.h"
#define SST_LPT_DSP_DMA_ADDR_OFFSET 0x0F0000
#define SST_WPT_DSP_DMA_ADDR_OFFSET 0x0FE000
#define SST_LPT_DSP_DMA_SIZE (1024 - 1)
/* Descriptor for SST ASoC machine driver */
struct sst_acpi_mach {
/* ACPI ID for the matching machine driver. Audio codec for instance */
const u8 id[ACPI_ID_LEN];
/* machine driver name */
const char *drv_name;
/* firmware file name */
const char *fw_filename;
};
/* Descriptor for setting up SST platform data */
struct sst_acpi_desc {
const char *drv_name;
struct sst_acpi_mach *machines;
/* Platform resource indexes. Must set to -1 if not used */
int resindex_lpe_base;
int resindex_pcicfg_base;
int resindex_fw_base;
int irqindex_host_ipc;
int resindex_dma_base;
/* Unique number identifying the SST core on platform */
int sst_id;
/* DMA only valid when resindex_dma_base != -1*/
int dma_engine;
int dma_size;
};
struct sst_acpi_priv {
struct platform_device *pdev_mach;
struct platform_device *pdev_pcm;
struct sst_pdata sst_pdata;
struct sst_acpi_desc *desc;
struct sst_acpi_mach *mach;
};
static void sst_acpi_fw_cb(const struct firmware *fw, void *context)
{
struct platform_device *pdev = context;
struct device *dev = &pdev->dev;
struct sst_acpi_priv *sst_acpi = platform_get_drvdata(pdev);
struct sst_pdata *sst_pdata = &sst_acpi->sst_pdata;
struct sst_acpi_desc *desc = sst_acpi->desc;
struct sst_acpi_mach *mach = sst_acpi->mach;
sst_pdata->fw = fw;
if (!fw) {
dev_err(dev, "Cannot load firmware %s\n", mach->fw_filename);
return;
}
/* register PCM and DAI driver */
sst_acpi->pdev_pcm =
platform_device_register_data(dev, desc->drv_name, -1,
sst_pdata, sizeof(*sst_pdata));
if (IS_ERR(sst_acpi->pdev_pcm)) {
dev_err(dev, "Cannot register device %s. Error %d\n",
desc->drv_name, (int)PTR_ERR(sst_acpi->pdev_pcm));
}
return;
}
static acpi_status sst_acpi_mach_match(acpi_handle handle, u32 level,
void *context, void **ret)
{
*(bool *)context = true;
return AE_OK;
}
static struct sst_acpi_mach *sst_acpi_find_machine(
struct sst_acpi_mach *machines)
{
struct sst_acpi_mach *mach;
bool found = false;
for (mach = machines; mach->id[0]; mach++)
if (ACPI_SUCCESS(acpi_get_devices(mach->id,
sst_acpi_mach_match,
&found, NULL)) && found)
return mach;
return NULL;
}
static int sst_acpi_probe(struct platform_device *pdev)
{
const struct acpi_device_id *id;
struct device *dev = &pdev->dev;
struct sst_acpi_priv *sst_acpi;
struct sst_pdata *sst_pdata;
struct sst_acpi_mach *mach;
struct sst_acpi_desc *desc;
struct resource *mmio;
int ret = 0;
sst_acpi = devm_kzalloc(dev, sizeof(*sst_acpi), GFP_KERNEL);
if (sst_acpi == NULL)
return -ENOMEM;
id = acpi_match_device(dev->driver->acpi_match_table, dev);
if (!id)
return -ENODEV;
desc = (struct sst_acpi_desc *)id->driver_data;
mach = sst_acpi_find_machine(desc->machines);
if (mach == NULL) {
dev_err(dev, "No matching ASoC machine driver found\n");
return -ENODEV;
}
sst_pdata = &sst_acpi->sst_pdata;
sst_pdata->id = desc->sst_id;
sst_acpi->desc = desc;
sst_acpi->mach = mach;
if (desc->resindex_dma_base >= 0) {
sst_pdata->dma_engine = desc->dma_engine;
sst_pdata->dma_base = desc->resindex_dma_base;
sst_pdata->dma_size = desc->dma_size;
}
if (desc->irqindex_host_ipc >= 0)
sst_pdata->irq = platform_get_irq(pdev, desc->irqindex_host_ipc);
if (desc->resindex_lpe_base >= 0) {
mmio = platform_get_resource(pdev, IORESOURCE_MEM,
desc->resindex_lpe_base);
if (mmio) {
sst_pdata->lpe_base = mmio->start;
sst_pdata->lpe_size = resource_size(mmio);
}
}
if (desc->resindex_pcicfg_base >= 0) {
mmio = platform_get_resource(pdev, IORESOURCE_MEM,
desc->resindex_pcicfg_base);
if (mmio) {
sst_pdata->pcicfg_base = mmio->start;
sst_pdata->pcicfg_size = resource_size(mmio);
}
}
if (desc->resindex_fw_base >= 0) {
mmio = platform_get_resource(pdev, IORESOURCE_MEM,
desc->resindex_fw_base);
if (mmio) {
sst_pdata->fw_base = mmio->start;
sst_pdata->fw_size = resource_size(mmio);
}
}
platform_set_drvdata(pdev, sst_acpi);
/* register machine driver */
sst_acpi->pdev_mach =
platform_device_register_data(dev, mach->drv_name, -1,
sst_pdata, sizeof(*sst_pdata));
if (IS_ERR(sst_acpi->pdev_mach))
return PTR_ERR(sst_acpi->pdev_mach);
/* continue SST probing after firmware is loaded */
ret = request_firmware_nowait(THIS_MODULE, true, mach->fw_filename,
dev, GFP_KERNEL, pdev, sst_acpi_fw_cb);
if (ret)
platform_device_unregister(sst_acpi->pdev_mach);
return ret;
}
static int sst_acpi_remove(struct platform_device *pdev)
{
struct sst_acpi_priv *sst_acpi = platform_get_drvdata(pdev);
struct sst_pdata *sst_pdata = &sst_acpi->sst_pdata;
platform_device_unregister(sst_acpi->pdev_mach);
if (!IS_ERR_OR_NULL(sst_acpi->pdev_pcm))
platform_device_unregister(sst_acpi->pdev_pcm);
release_firmware(sst_pdata->fw);
return 0;
}
static struct sst_acpi_mach haswell_machines[] = {
{ "INT33CA", "haswell-audio", "intel/IntcSST1.bin" },
{}
};
static struct sst_acpi_desc sst_acpi_haswell_desc = {
.drv_name = "haswell-pcm-audio",
.machines = haswell_machines,
.resindex_lpe_base = 0,
.resindex_pcicfg_base = 1,
.resindex_fw_base = -1,
.irqindex_host_ipc = 0,
.sst_id = SST_DEV_ID_LYNX_POINT,
.dma_engine = SST_DMA_TYPE_DW,
.resindex_dma_base = SST_LPT_DSP_DMA_ADDR_OFFSET,
.dma_size = SST_LPT_DSP_DMA_SIZE,
};
static struct sst_acpi_mach broadwell_machines[] = {
{ "INT343A", "broadwell-audio", "intel/IntcSST2.bin" },
{}
};
static struct sst_acpi_desc sst_acpi_broadwell_desc = {
.drv_name = "haswell-pcm-audio",
.machines = broadwell_machines,
.resindex_lpe_base = 0,
.resindex_pcicfg_base = 1,
.resindex_fw_base = -1,
.irqindex_host_ipc = 0,
.sst_id = SST_DEV_ID_WILDCAT_POINT,
.dma_engine = SST_DMA_TYPE_DW,
.resindex_dma_base = SST_WPT_DSP_DMA_ADDR_OFFSET,
.dma_size = SST_LPT_DSP_DMA_SIZE,
};
static struct sst_acpi_mach baytrail_machines[] = {
{ "10EC5640", "byt-rt5640", "intel/fw_sst_0f28.bin-i2s_master" },
{}
};
static struct sst_acpi_desc sst_acpi_baytrail_desc = {
.drv_name = "baytrail-pcm-audio",
.machines = baytrail_machines,
.resindex_lpe_base = 0,
.resindex_pcicfg_base = 1,
.resindex_fw_base = 2,
.irqindex_host_ipc = 5,
.sst_id = SST_DEV_ID_BYT,
.resindex_dma_base = -1,
};
static struct acpi_device_id sst_acpi_match[] = {
{ "INT33C8", (unsigned long)&sst_acpi_haswell_desc },
{ "INT3438", (unsigned long)&sst_acpi_broadwell_desc },
{ "80860F28", (unsigned long)&sst_acpi_baytrail_desc },
{ }
};
MODULE_DEVICE_TABLE(acpi, sst_acpi_match);
static struct platform_driver sst_acpi_driver = {
.probe = sst_acpi_probe,
.remove = sst_acpi_remove,
.driver = {
.name = "sst-acpi",
.owner = THIS_MODULE,
.acpi_match_table = ACPI_PTR(sst_acpi_match),
},
};
module_platform_driver(sst_acpi_driver);
MODULE_AUTHOR("Jarkko Nikula <jarkko.nikula@linux.intel.com>");
MODULE_DESCRIPTION("Intel SST loader on ACPI systems");
MODULE_LICENSE("GPL v2");
