1 files changed, 284 insertions, 0 deletions

diff --git a/sound/soc/intel/sst-acpi.c b/sound/soc/intel/sst-acpi.c
new file mode 100644
index 000000000000..5d06eecb6198
--- /dev/null
+++ b/sound/soc/intel/sst-acpi.c
@@ -0,0 +1,284 @@
+/*
+ * 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");