[PATCH v3 14/14] ASoC: SOF: Add utils

Pierre-Louis Bossart
2018-12-11T21:23:18Z

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>
---
sound/soc/sof/utils.c | 173 ++++++++++++++++++++++++++++++++++++++++++
1 file changed, 173 insertions(+)
create mode 100644 sound/soc/sof/utils.c

diff --git a/sound/soc/sof/utils.c b/sound/soc/sof/utils.c
new file mode 100644
index 000000000000..bf66e14bc258
--- /dev/null
+++ b/sound/soc/sof/utils.c
@@ -0,0 +1,173 @@
+// 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.h>
+#include <linux/platform_device.h>
+#include <sound/soc.h>
+#include <sound/sof.h>
+#include "sof-priv.h"
+
+int sof_bes_setup(struct device *dev, struct snd_sof_dsp_ops *ops,
+ struct snd_soc_dai_link *links, int link_num,
+ struct snd_soc_card *card)
+{
+ char name[32];
+ int i;
+
+ if (!ops || !links || !card)
+ return -EINVAL;
+
+ /* set up BE dai_links */
+ for (i = 0; i < link_num; i++) {
+ snprintf(name, 32, "NoCodec-%d", i);
+ links[i].name = devm_kstrdup(dev, name, GFP_KERNEL);
+ if (!links[i].name)
+ return -ENOMEM;
+
+ links[i].id = i;
+ links[i].no_pcm = 1;
+ links[i].cpu_dai_name = ops->drv[i].name;
+ links[i].platform_name = "sof-audio";
+ links[i].codec_dai_name = "snd-soc-dummy-dai";
+ links[i].codec_name = "snd-soc-dummy";
+ links[i].dpcm_playback = 1;
+ links[i].dpcm_capture = 1;
+ }
+
+ card->dai_link = links;
+ card->num_links = link_num;
+
+ return 0;
+}
+EXPORT_SYMBOL(sof_bes_setup);
+
+/* register sof platform device */
+int sof_create_platform_device(struct sof_platform_priv *priv)
+{
+ struct snd_sof_pdata *sof_pdata = priv->sof_pdata;
+ struct device *dev = sof_pdata->dev;
+
+ priv->pdev_pcm =
+ platform_device_register_data(dev, "sof-audio", -1,
+ sof_pdata, sizeof(*sof_pdata));
+ if (IS_ERR(priv->pdev_pcm)) {
+ dev_err(dev, "error: cannot register device sof-audio. Error %d\n",
+ (int)PTR_ERR(priv->pdev_pcm));
+ return PTR_ERR(priv->pdev_pcm);
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(sof_create_platform_device);
+
+/*
+ * Register IO
+ */
+
+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)
+{
+#ifdef CONFIG_64BIT
+ writeq(value, addr);
+#else
+ memcpy_toio(addr, &value, sizeof(value));
+#endif
+}
+EXPORT_SYMBOL(sof_io_write64);
+
+u64 sof_io_read64(struct snd_sof_dev *sdev, void __iomem *addr)
+{
+#ifdef CONFIG_64BIT
+ return readq(addr);
+#else
+ u64 val;
+
+ memcpy_fromio(&val, addr, sizeof(val));
+ return val;
+#endif
+}
+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 offset, void *src,
+ size_t size)
+{
+ void __iomem *dest = sdev->bar[sdev->mmio_bar] + offset;
+ const u8 *src_byte = src;
+ u32 affected_mask;
+ u32 tmp = 0;
+ 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
+ */
+ __ioread32_copy(&tmp, dest + m * 4, 1);
+ tmp &= ~affected_mask;
+
+ tmp |= *(u32 *)(src_byte + m * 4) & affected_mask;
+ __iowrite32_copy(dest + m * 4, &tmp, 1);
+ }
+}
+EXPORT_SYMBOL(sof_block_write);
+
+void sof_block_read(struct snd_sof_dev *sdev, u32 offset, void *dest,
+ size_t size)
+{
+ void __iomem *src = sdev->bar[sdev->mmio_bar] + offset;
+
+ memcpy_fromio(dest, src, size);
+}
+EXPORT_SYMBOL(sof_block_read);
--
2.17.1