ASoC: SOF: Add utils

Helpers to set-up back-ends, create platform devices and common
IO/block read/write operations

Signed-off-by: Keyon Jie <yang.jie@linux.intel.com>
Signed-off-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/sof/utils.c b/sound/soc/sof/utils.c
new file mode 100644 (file)
index 0000000..2ac4c3d
--- /dev/null
+++ b/sound/soc/sof/utils.c
@@ -0,0 +1,112 @@
+// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
+//
+// This file is provided under a dual BSD/GPLv2 license.  When using or
+// redistributing this file, you may do so under either license.
+//
+// Copyright(c) 2018 Intel Corporation. All rights reserved.
+//
+// Author: Keyon Jie <yang.jie@linux.intel.com>
+//
+
+#include <linux/io-64-nonatomic-lo-hi.h>
+#include <linux/platform_device.h>
+#include <sound/soc.h>
+#include <sound/sof.h>
+#include "sof-priv.h"
+
+/*
+ * Register IO
+ *
+ * The sof_io_xyz() wrappers are typically referenced in snd_sof_dsp_ops
+ * structures and cannot be inlined.
+ */
+
+void sof_io_write(struct snd_sof_dev *sdev, void __iomem *addr, u32 value)
+{
+       writel(value, addr);
+}
+EXPORT_SYMBOL(sof_io_write);
+
+u32 sof_io_read(struct snd_sof_dev *sdev, void __iomem *addr)
+{
+       return readl(addr);
+}
+EXPORT_SYMBOL(sof_io_read);
+
+void sof_io_write64(struct snd_sof_dev *sdev, void __iomem *addr, u64 value)
+{
+       writeq(value, addr);
+}
+EXPORT_SYMBOL(sof_io_write64);
+
+u64 sof_io_read64(struct snd_sof_dev *sdev, void __iomem *addr)
+{
+       return readq(addr);
+}
+EXPORT_SYMBOL(sof_io_read64);
+
+/*
+ * IPC Mailbox IO
+ */
+
+void sof_mailbox_write(struct snd_sof_dev *sdev, u32 offset,
+                      void *message, size_t bytes)
+{
+       void __iomem *dest = sdev->bar[sdev->mailbox_bar] + offset;
+
+       memcpy_toio(dest, message, bytes);
+}
+EXPORT_SYMBOL(sof_mailbox_write);
+
+void sof_mailbox_read(struct snd_sof_dev *sdev, u32 offset,
+                     void *message, size_t bytes)
+{
+       void __iomem *src = sdev->bar[sdev->mailbox_bar] + offset;
+
+       memcpy_fromio(message, src, bytes);
+}
+EXPORT_SYMBOL(sof_mailbox_read);
+
+/*
+ * Memory copy.
+ */
+
+void sof_block_write(struct snd_sof_dev *sdev, u32 bar, u32 offset, void *src,
+                    size_t size)
+{
+       void __iomem *dest = sdev->bar[bar] + offset;
+       const u8 *src_byte = src;
+       u32 affected_mask;
+       u32 tmp;
+       int m, n;
+
+       m = size / 4;
+       n = size % 4;
+
+       /* __iowrite32_copy use 32bit size values so divide by 4 */
+       __iowrite32_copy(dest, src, m);
+
+       if (n) {
+               affected_mask = (1 << (8 * n)) - 1;
+
+               /* first read the 32bit data of dest, then change affected
+                * bytes, and write back to dest. For unaffected bytes, it
+                * should not be changed
+                */
+               tmp = ioread32(dest + m * 4);
+               tmp &= ~affected_mask;
+
+               tmp |= *(u32 *)(src_byte + m * 4) & affected_mask;
+               iowrite32(tmp, dest + m * 4);
+       }
+}
+EXPORT_SYMBOL(sof_block_write);
+
+void sof_block_read(struct snd_sof_dev *sdev, u32 bar, u32 offset, void *dest,
+                   size_t size)
+{
+       void __iomem *src = sdev->bar[bar] + offset;
+
+       memcpy_fromio(dest, src, size);
+}
+EXPORT_SYMBOL(sof_block_read);