1 files changed, 385 insertions, 0 deletions

diff --git a/sound/soc/intel/sst-dsp.c b/sound/soc/intel/sst-dsp.c
new file mode 100644
index 000000000000..0c129fd85ecf
--- /dev/null
+++ b/sound/soc/intel/sst-dsp.c
@@ -0,0 +1,385 @@
+/*
+ * Intel Smart Sound Technology (SST) DSP Core Driver
+ *
+ * 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/slab.h>
+#include <linux/export.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+
+#include "sst-dsp.h"
+#include "sst-dsp-priv.h"
+
+#define CREATE_TRACE_POINTS
+#include <trace/events/intel-sst.h>
+
+/* Internal generic low-level SST IO functions - can be overidden */
+void sst_shim32_write(void __iomem *addr, u32 offset, u32 value)
+{
+        writel(value, addr + offset);
+}
+EXPORT_SYMBOL_GPL(sst_shim32_write);
+
+u32 sst_shim32_read(void __iomem *addr, u32 offset)
+{
+        return readl(addr + offset);
+}
+EXPORT_SYMBOL_GPL(sst_shim32_read);
+
+void sst_shim32_write64(void __iomem *addr, u32 offset, u64 value)
+{
+        memcpy_toio(addr + offset, &value, sizeof(value));
+}
+EXPORT_SYMBOL_GPL(sst_shim32_write64);
+
+u64 sst_shim32_read64(void __iomem *addr, u32 offset)
+{
+        u64 val;
+
+        memcpy_fromio(&val, addr + offset, sizeof(val));
+        return val;
+}
+EXPORT_SYMBOL_GPL(sst_shim32_read64);
+
+static inline void _sst_memcpy_toio_32(volatile u32 __iomem *dest,
+        u32 *src, size_t bytes)
+{
+        int i, words = bytes >> 2;
+
+        for (i = 0; i < words; i++)
+                writel(src[i], dest + i);
+}
+
+static inline void _sst_memcpy_fromio_32(u32 *dest,
+        const volatile __iomem u32 *src, size_t bytes)
+{
+        int i, words = bytes >> 2;
+
+        for (i = 0; i < words; i++)
+                dest[i] = readl(src + i);
+}
+
+void sst_memcpy_toio_32(struct sst_dsp *sst,
+        void __iomem *dest, void *src, size_t bytes)
+{
+        _sst_memcpy_toio_32(dest, src, bytes);
+}
+EXPORT_SYMBOL_GPL(sst_memcpy_toio_32);
+
+void sst_memcpy_fromio_32(struct sst_dsp *sst, void *dest,
+        void __iomem *src, size_t bytes)
+{
+        _sst_memcpy_fromio_32(dest, src, bytes);
+}
+EXPORT_SYMBOL_GPL(sst_memcpy_fromio_32);
+
+/* Public API */
+void sst_dsp_shim_write(struct sst_dsp *sst, u32 offset, u32 value)
+{
+        unsigned long flags;
+
+        spin_lock_irqsave(&sst->spinlock, flags);
+        sst->ops->write(sst->addr.shim, offset, value);
+        spin_unlock_irqrestore(&sst->spinlock, flags);
+}
+EXPORT_SYMBOL_GPL(sst_dsp_shim_write);
+
+u32 sst_dsp_shim_read(struct sst_dsp *sst, u32 offset)
+{
+        unsigned long flags;
+        u32 val;
+
+        spin_lock_irqsave(&sst->spinlock, flags);
+        val = sst->ops->read(sst->addr.shim, offset);
+        spin_unlock_irqrestore(&sst->spinlock, flags);
+
+        return val;
+}
+EXPORT_SYMBOL_GPL(sst_dsp_shim_read);
+
+void sst_dsp_shim_write64(struct sst_dsp *sst, u32 offset, u64 value)
+{
+        unsigned long flags;
+
+        spin_lock_irqsave(&sst->spinlock, flags);
+        sst->ops->write64(sst->addr.shim, offset, value);
+        spin_unlock_irqrestore(&sst->spinlock, flags);
+}
+EXPORT_SYMBOL_GPL(sst_dsp_shim_write64);
+
+u64 sst_dsp_shim_read64(struct sst_dsp *sst, u32 offset)
+{
+        unsigned long flags;
+        u64 val;
+
+        spin_lock_irqsave(&sst->spinlock, flags);
+        val = sst->ops->read64(sst->addr.shim, offset);
+        spin_unlock_irqrestore(&sst->spinlock, flags);
+
+        return val;
+}
+EXPORT_SYMBOL_GPL(sst_dsp_shim_read64);
+
+void sst_dsp_shim_write_unlocked(struct sst_dsp *sst, u32 offset, u32 value)
+{
+        sst->ops->write(sst->addr.shim, offset, value);
+}
+EXPORT_SYMBOL_GPL(sst_dsp_shim_write_unlocked);
+
+u32 sst_dsp_shim_read_unlocked(struct sst_dsp *sst, u32 offset)
+{
+        return sst->ops->read(sst->addr.shim, offset);
+}
+EXPORT_SYMBOL_GPL(sst_dsp_shim_read_unlocked);
+
+void sst_dsp_shim_write64_unlocked(struct sst_dsp *sst, u32 offset, u64 value)
+{
+        sst->ops->write64(sst->addr.shim, offset, value);
+}
+EXPORT_SYMBOL_GPL(sst_dsp_shim_write64_unlocked);
+
+u64 sst_dsp_shim_read64_unlocked(struct sst_dsp *sst, u32 offset)
+{
+        return sst->ops->read64(sst->addr.shim, offset);
+}
+EXPORT_SYMBOL_GPL(sst_dsp_shim_read64_unlocked);
+
+int sst_dsp_shim_update_bits_unlocked(struct sst_dsp *sst, u32 offset,
+                                u32 mask, u32 value)
+{
+        bool change;
+        unsigned int old, new;
+        u32 ret;
+
+        ret = sst_dsp_shim_read_unlocked(sst, offset);
+
+        old = ret;
+        new = (old & (~mask)) | (value & mask);
+
+        change = (old != new);
+        if (change)
+                sst_dsp_shim_write_unlocked(sst, offset, new);
+
+        return change;
+}
+EXPORT_SYMBOL_GPL(sst_dsp_shim_update_bits_unlocked);
+
+int sst_dsp_shim_update_bits64_unlocked(struct sst_dsp *sst, u32 offset,
+                                u64 mask, u64 value)
+{
+        bool change;
+        u64 old, new;
+
+        old = sst_dsp_shim_read64_unlocked(sst, offset);
+
+        new = (old & (~mask)) | (value & mask);
+
+        change = (old != new);
+        if (change)
+                sst_dsp_shim_write64_unlocked(sst, offset, new);
+
+        return change;
+}
+EXPORT_SYMBOL_GPL(sst_dsp_shim_update_bits64_unlocked);
+
+int sst_dsp_shim_update_bits(struct sst_dsp *sst, u32 offset,
+                                u32 mask, u32 value)
+{
+        unsigned long flags;
+        bool change;
+
+        spin_lock_irqsave(&sst->spinlock, flags);
+        change = sst_dsp_shim_update_bits_unlocked(sst, offset, mask, value);
+        spin_unlock_irqrestore(&sst->spinlock, flags);
+        return change;
+}
+EXPORT_SYMBOL_GPL(sst_dsp_shim_update_bits);
+
+int sst_dsp_shim_update_bits64(struct sst_dsp *sst, u32 offset,
+                                u64 mask, u64 value)
+{
+        unsigned long flags;
+        bool change;
+
+        spin_lock_irqsave(&sst->spinlock, flags);
+        change = sst_dsp_shim_update_bits64_unlocked(sst, offset, mask, value);
+        spin_unlock_irqrestore(&sst->spinlock, flags);
+        return change;
+}
+EXPORT_SYMBOL_GPL(sst_dsp_shim_update_bits64);
+
+void sst_dsp_dump(struct sst_dsp *sst)
+{
+        sst->ops->dump(sst);
+}
+EXPORT_SYMBOL_GPL(sst_dsp_dump);
+
+void sst_dsp_reset(struct sst_dsp *sst)
+{
+        sst->ops->reset(sst);
+}
+EXPORT_SYMBOL_GPL(sst_dsp_reset);
+
+int sst_dsp_boot(struct sst_dsp *sst)
+{
+        sst->ops->boot(sst);
+        return 0;
+}
+EXPORT_SYMBOL_GPL(sst_dsp_boot);
+
+void sst_dsp_ipc_msg_tx(struct sst_dsp *dsp, u32 msg)
+{
+        sst_dsp_shim_write_unlocked(dsp, SST_IPCX, msg | SST_IPCX_BUSY);
+        trace_sst_ipc_msg_tx(msg);
+}
+EXPORT_SYMBOL_GPL(sst_dsp_ipc_msg_tx);
+
+u32 sst_dsp_ipc_msg_rx(struct sst_dsp *dsp)
+{
+        u32 msg;
+
+        msg = sst_dsp_shim_read_unlocked(dsp, SST_IPCX);
+        trace_sst_ipc_msg_rx(msg);
+
+        return msg;
+}
+EXPORT_SYMBOL_GPL(sst_dsp_ipc_msg_rx);
+
+int sst_dsp_mailbox_init(struct sst_dsp *sst, u32 inbox_offset, size_t inbox_size,
+        u32 outbox_offset, size_t outbox_size)
+{
+        sst->mailbox.in_base = sst->addr.lpe + inbox_offset;
+        sst->mailbox.out_base = sst->addr.lpe + outbox_offset;
+        sst->mailbox.in_size = inbox_size;
+        sst->mailbox.out_size = outbox_size;
+        return 0;
+}
+EXPORT_SYMBOL_GPL(sst_dsp_mailbox_init);
+
+void sst_dsp_outbox_write(struct sst_dsp *sst, void *message, size_t bytes)
+{
+        u32 i;
+
+        trace_sst_ipc_outbox_write(bytes);
+
+        memcpy_toio(sst->mailbox.out_base, message, bytes);
+
+        for (i = 0; i < bytes; i += 4)
+                trace_sst_ipc_outbox_wdata(i, *(u32 *)(message + i));
+}
+EXPORT_SYMBOL_GPL(sst_dsp_outbox_write);
+
+void sst_dsp_outbox_read(struct sst_dsp *sst, void *message, size_t bytes)
+{
+        u32 i;
+
+        trace_sst_ipc_outbox_read(bytes);
+
+        memcpy_fromio(message, sst->mailbox.out_base, bytes);
+
+        for (i = 0; i < bytes; i += 4)
+                trace_sst_ipc_outbox_rdata(i, *(u32 *)(message + i));
+}
+EXPORT_SYMBOL_GPL(sst_dsp_outbox_read);
+
+void sst_dsp_inbox_write(struct sst_dsp *sst, void *message, size_t bytes)
+{
+        u32 i;
+
+        trace_sst_ipc_inbox_write(bytes);
+
+        memcpy_toio(sst->mailbox.in_base, message, bytes);
+
+        for (i = 0; i < bytes; i += 4)
+                trace_sst_ipc_inbox_wdata(i, *(u32 *)(message + i));
+}
+EXPORT_SYMBOL_GPL(sst_dsp_inbox_write);
+
+void sst_dsp_inbox_read(struct sst_dsp *sst, void *message, size_t bytes)
+{
+        u32 i;
+
+        trace_sst_ipc_inbox_read(bytes);
+
+        memcpy_fromio(message, sst->mailbox.in_base, bytes);
+
+        for (i = 0; i < bytes; i += 4)
+                trace_sst_ipc_inbox_rdata(i, *(u32 *)(message + i));
+}
+EXPORT_SYMBOL_GPL(sst_dsp_inbox_read);
+
+struct sst_dsp *sst_dsp_new(struct device *dev,
+        struct sst_dsp_device *sst_dev, struct sst_pdata *pdata)
+{
+        struct sst_dsp *sst;
+        int err;
+
+        dev_dbg(dev, "initialising audio DSP id 0x%x\n", pdata->id);
+
+        sst = devm_kzalloc(dev, sizeof(*sst), GFP_KERNEL);
+        if (sst == NULL)
+                return NULL;
+
+        spin_lock_init(&sst->spinlock);
+        mutex_init(&sst->mutex);
+        sst->dev = dev;
+        sst->thread_context = sst_dev->thread_context;
+        sst->sst_dev = sst_dev;
+        sst->id = pdata->id;
+        sst->irq = pdata->irq;
+        sst->ops = sst_dev->ops;
+        sst->pdata = pdata;
+        INIT_LIST_HEAD(&sst->used_block_list);
+        INIT_LIST_HEAD(&sst->free_block_list);
+        INIT_LIST_HEAD(&sst->module_list);
+        INIT_LIST_HEAD(&sst->fw_list);
+
+        /* Initialise SST Audio DSP */
+        if (sst->ops->init) {
+                err = sst->ops->init(sst, pdata);
+                if (err < 0)
+                        return NULL;
+        }
+
+        /* Register the ISR */
+        err = request_threaded_irq(sst->irq, sst->ops->irq_handler,
+                sst_dev->thread, IRQF_SHARED, "AudioDSP", sst);
+        if (err)
+                goto irq_err;
+
+        return sst;
+
+irq_err:
+        if (sst->ops->free)
+                sst->ops->free(sst);
+
+        return NULL;
+}
+EXPORT_SYMBOL_GPL(sst_dsp_new);
+
+void sst_dsp_free(struct sst_dsp *sst)
+{
+        free_irq(sst->irq, sst);
+        if (sst->ops->free)
+                sst->ops->free(sst);
+}
+EXPORT_SYMBOL_GPL(sst_dsp_free);
+
+/* Module information */
+MODULE_AUTHOR("Liam Girdwood");
+MODULE_DESCRIPTION("Intel SST Core");
+MODULE_LICENSE("GPL v2");