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* [PATCH 0/3] Mediatek MT8195 ADSP IPC support
@ 2021-11-17 13:12 ` allen-kh.cheng
  0 siblings, 0 replies; 14+ messages in thread
From: allen-kh.cheng @ 2021-11-17 13:12 UTC (permalink / raw)
  To: Jassi Brar, Rob Herring, Matthias Brugger, Linux-ALSA
  Cc: Project_Global_Chrome_Upstream_Group, linux-kernel, devicetree,
	linux-arm-kernel, linux-mediatek, sound-open-firmware,
	allen-kh.cheng

This patches are providing support for ADSP IPC support
for MT8195.

Mediatek ADSP IPC is used to send notification or short
message between processors with dsp. It will place the
message to the share buffer and will access the ADSP
mailbox registers to kick dsp.

Two mailboxes used to send notification or short message
between processors with dsp

Allen-KH Cheng (3):
  dt-bindings: mediatek: add adsp-mbox document
  mailbox: mediatek: add support for adsp mailbox controller
  firmware: mediatek: add adsp ipc protocol interface

 .../bindings/mailbox/mtk,adsp-mbox.yaml       |  53 +++++
 drivers/firmware/Kconfig                      |   1 +
 drivers/firmware/Makefile                     |   1 +
 drivers/firmware/mediatek/Kconfig             |  10 +
 drivers/firmware/mediatek/Makefile            |   2 +
 drivers/firmware/mediatek/mtk-adsp-ipc.c      | 130 ++++++++++++
 drivers/mailbox/Kconfig                       |   8 +
 drivers/mailbox/Makefile                      |   2 +
 drivers/mailbox/mtk-adsp-mailbox.c            | 187 ++++++++++++++++++
 .../linux/firmware/mediatek/mtk-adsp-ipc.h    |  72 +++++++
 10 files changed, 466 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mailbox/mtk,adsp-mbox.yaml
 create mode 100644 drivers/firmware/mediatek/Kconfig
 create mode 100644 drivers/firmware/mediatek/Makefile
 create mode 100644 drivers/firmware/mediatek/mtk-adsp-ipc.c
 create mode 100644 drivers/mailbox/mtk-adsp-mailbox.c
 create mode 100644 include/linux/firmware/mediatek/mtk-adsp-ipc.h

-- 
2.18.0


_______________________________________________
Linux-mediatek mailing list
Linux-mediatek@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-mediatek

^ permalink raw reply	[flat|nested] 14+ messages in thread
* [PATCH 3/3] firmware: mediatek: add adsp ipc protocol interface
@ 2021-10-28 13:28 ` allen-kh.cheng
  0 siblings, 0 replies; 14+ messages in thread
From: allen-kh.cheng @ 2021-10-28 13:28 UTC (permalink / raw)
  To: Jassi Brar, Rob Herring, Matthias Brugger
  Cc: Project_Global_Chrome_Upstream_Group, linux-kernel, devicetree,
	linux-arm-kernel, linux-mediatek, Allen-KH Cheng

From: Allen-KH Cheng <Allen-KH.Cheng@mediatek.com>

Some of mediatek processors contain
the Tensilica HiFix DSP for audio processing.

The communication between Host CPU and DSP firmware is
taking place using a shared memory area for message passing.

ADSP IPC protocol offers (send/recv) interfaces using
mediatek-mailbox APIs.

We use two mbox channels to implement a request-reply protocol.

Signed-off-by: Allen-KH Cheng <Allen-KH.Cheng@mediatek.com>
---
 drivers/firmware/Kconfig                      |   1 +
 drivers/firmware/Makefile                     |   1 +
 drivers/firmware/mediatek/Kconfig             |  10 ++
 drivers/firmware/mediatek/Makefile            |   2 +
 drivers/firmware/mediatek/mtk-adsp-ipc.c      | 130 ++++++++++++++++++
 .../linux/firmware/mediatek/mtk-adsp-ipc.h    |  72 ++++++++++
 6 files changed, 216 insertions(+)
 create mode 100644 drivers/firmware/mediatek/Kconfig
 create mode 100644 drivers/firmware/mediatek/Makefile
 create mode 100644 drivers/firmware/mediatek/mtk-adsp-ipc.c
 create mode 100644 include/linux/firmware/mediatek/mtk-adsp-ipc.h

diff --git a/drivers/firmware/Kconfig b/drivers/firmware/Kconfig
index 220a58cf0a44..005f76a9a31a 100644
--- a/drivers/firmware/Kconfig
+++ b/drivers/firmware/Kconfig
@@ -301,6 +301,7 @@ source "drivers/firmware/broadcom/Kconfig"
 source "drivers/firmware/google/Kconfig"
 source "drivers/firmware/efi/Kconfig"
 source "drivers/firmware/imx/Kconfig"
+source "drivers/firmware/mediatek/Kconfig"
 source "drivers/firmware/meson/Kconfig"
 source "drivers/firmware/psci/Kconfig"
 source "drivers/firmware/smccc/Kconfig"
diff --git a/drivers/firmware/Makefile b/drivers/firmware/Makefile
index 5ced0673d94b..c0d1f3bdeae4 100644
--- a/drivers/firmware/Makefile
+++ b/drivers/firmware/Makefile
@@ -33,6 +33,7 @@ obj-$(CONFIG_GOOGLE_FIRMWARE)	+= google/
 obj-$(CONFIG_EFI)		+= efi/
 obj-$(CONFIG_UEFI_CPER)		+= efi/
 obj-y				+= imx/
+obj-y				+= mediatek/
 obj-y				+= psci/
 obj-y				+= smccc/
 obj-y				+= tegra/
diff --git a/drivers/firmware/mediatek/Kconfig b/drivers/firmware/mediatek/Kconfig
new file mode 100644
index 000000000000..84a3b3bf5146
--- /dev/null
+++ b/drivers/firmware/mediatek/Kconfig
@@ -0,0 +1,10 @@
+# SPDX-License-Identifier: GPL-2.0-only
+config MTK_ADSP_IPC
+	tristate "MTK ADSP IPC Protocol driver"
+	depends on MTK_ADSP_IPC_MBOX
+	help
+	  Say yes here to add support for the MediaTek ADSP IPC protocol
+	  between host AP (Linux) and the firmware running on ADSP.
+	  ADSP exists on some mtk processors.
+	  Client might use shared memory to exchange information with ADSP side.
+
diff --git a/drivers/firmware/mediatek/Makefile b/drivers/firmware/mediatek/Makefile
new file mode 100644
index 000000000000..4e840b65650d
--- /dev/null
+++ b/drivers/firmware/mediatek/Makefile
@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0
+obj-$(CONFIG_MTK_ADSP_IPC)		+= mtk-adsp-ipc.o
diff --git a/drivers/firmware/mediatek/mtk-adsp-ipc.c b/drivers/firmware/mediatek/mtk-adsp-ipc.c
new file mode 100644
index 000000000000..7307c55b5628
--- /dev/null
+++ b/drivers/firmware/mediatek/mtk-adsp-ipc.c
@@ -0,0 +1,130 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2021 MediaTek Corporation. All rights reserved.
+ * Author: Allen-KH Cheng <allen-kh.cheng@mediatek.com>
+ */
+
+#include <linux/firmware/mediatek/mtk-adsp-ipc.h>
+#include <linux/kernel.h>
+#include <linux/mailbox_client.h>
+#include <linux/module.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+int adsp_ipc_send(struct mtk_adsp_ipc *ipc, unsigned int idx, uint32_t op)
+{
+	struct mtk_adsp_chan *dsp_chan = &ipc->chans[idx];
+	struct adsp_mbox_ch_info *ch_info = dsp_chan->ch->con_priv;
+	int ret;
+
+	if (idx >= MTK_ADSP_MBOX_NUM)
+		return -EINVAL;
+
+	ch_info->ipc_op_val = op;
+	ret = mbox_send_message(dsp_chan->ch, NULL);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+EXPORT_SYMBOL(adsp_ipc_send);
+
+static void adsp_ipc_recv(struct mbox_client *c, void *msg)
+{
+	struct mtk_adsp_chan *chan = container_of(c, struct mtk_adsp_chan, cl);
+
+	if (chan->idx == MTK_ADSP_MBOX_REPLY)
+		chan->ipc->ops->handle_reply(chan->ipc);
+	else
+		chan->ipc->ops->handle_request(chan->ipc);
+}
+
+static int mtk_adsp_ipc_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct mtk_adsp_ipc *dsp_ipc;
+	struct mtk_adsp_chan *dsp_chan;
+	struct mbox_client *cl;
+	char *chan_name;
+	int ret;
+	int i, j;
+
+	device_set_of_node_from_dev(&pdev->dev, pdev->dev.parent);
+
+	dsp_ipc = devm_kzalloc(dev, sizeof(*dsp_ipc), GFP_KERNEL);
+	if (!dsp_ipc)
+		return -ENOMEM;
+
+	for (i = 0; i < MTK_ADSP_MBOX_NUM; i++) {
+		chan_name = kasprintf(GFP_KERNEL, "mbox%d", i);
+		if (!chan_name)
+			return -ENOMEM;
+
+		dsp_chan = &dsp_ipc->chans[i];
+		cl = &dsp_chan->cl;
+		cl->dev = dev->parent;
+		cl->tx_block = false;
+		cl->knows_txdone = false;
+		cl->tx_prepare = NULL;
+		cl->rx_callback = adsp_ipc_recv;
+
+		dsp_chan->ipc = dsp_ipc;
+		dsp_chan->idx = i;
+		dsp_chan->ch = mbox_request_channel_byname(cl, chan_name);
+		if (IS_ERR(dsp_chan->ch)) {
+			ret = PTR_ERR(dsp_chan->ch);
+			if (ret != -EPROBE_DEFER)
+				dev_err(dev, "Failed to request mbox chan %d ret %d\n",
+					i, ret);
+			goto out;
+		}
+
+		dev_dbg(dev, "request mbox chan %s\n", chan_name);
+		kfree(chan_name);
+	}
+
+	dsp_ipc->dev = dev;
+	dev_set_drvdata(dev, dsp_ipc);
+	dev_dbg(dev, "MTK ADSP IPC initialized\n");
+
+	return 0;
+
+out:
+	kfree(chan_name);
+	for (j = 0; j < i; j++) {
+		dsp_chan = &dsp_ipc->chans[j];
+		mbox_free_channel(dsp_chan->ch);
+	}
+
+	return ret;
+}
+
+static int mtk_adsp_remove(struct platform_device *pdev)
+{
+	struct mtk_adsp_chan *dsp_chan;
+	struct mtk_adsp_ipc *dsp_ipc;
+	int i;
+
+	dsp_ipc = dev_get_drvdata(&pdev->dev);
+
+	for (i = 0; i < MTK_ADSP_MBOX_NUM; i++) {
+		dsp_chan = &dsp_ipc->chans[i];
+		mbox_free_channel(dsp_chan->ch);
+	}
+
+	return 0;
+}
+
+static struct platform_driver mtk_adsp_ipc_driver = {
+	.driver = {
+		.name = "mtk-adsp-ipc",
+	},
+	.probe = mtk_adsp_ipc_probe,
+	.remove = mtk_adsp_remove,
+};
+builtin_platform_driver(mtk_adsp_ipc_driver);
+
+MODULE_AUTHOR("Allen-KH Cheng <allen-kh.cheng@mediatek.com>");
+MODULE_DESCRIPTION("MTK ADSP IPC protocol driver");
+MODULE_LICENSE("GPL v2");
diff --git a/include/linux/firmware/mediatek/mtk-adsp-ipc.h b/include/linux/firmware/mediatek/mtk-adsp-ipc.h
new file mode 100644
index 000000000000..26ae4ed9deb2
--- /dev/null
+++ b/include/linux/firmware/mediatek/mtk-adsp-ipc.h
@@ -0,0 +1,72 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) 2021 MediaTek Inc.
+ */
+
+#ifndef MTK_ADSP_IPC_H
+#define MTK_ADSP_IPC_H
+
+#include <linux/device.h>
+#include <linux/types.h>
+#include <linux/mailbox_controller.h>
+#include <linux/mailbox_client.h>
+
+#define MTK_ADSP_IPC_REQ 0
+#define MTK_ADSP_IPC_RSP 1
+#define MTK_ADSP_IPC_OP_REQ 0x1
+#define MTK_ADSP_IPC_OP_RSP 0x2
+
+enum {
+	MTK_ADSP_MBOX_REPLY,
+	MTK_ADSP_MBOX_REQUEST,
+	MTK_ADSP_MBOX_NUM,
+};
+
+struct mtk_adsp_ipc;
+
+struct mtk_adsp_ipc_ops {
+	void (*handle_reply)(struct mtk_adsp_ipc *ipc);
+	void (*handle_request)(struct mtk_adsp_ipc *ipc);
+};
+
+struct mtk_adsp_chan {
+	struct mtk_adsp_ipc *ipc;
+	struct mbox_client cl;
+	struct mbox_chan *ch;
+	char *name;
+	int idx;
+};
+
+struct mtk_adsp_ipc {
+	struct mtk_adsp_chan chans[MTK_ADSP_MBOX_NUM];
+	struct device *dev;
+	struct mtk_adsp_ipc_ops *ops;
+	void *private_data;
+};
+
+struct adsp_mbox_ch_info {
+	u32 ipc_op_val;
+	void __iomem *va_reg;
+	/* protect access to adsp mbox registers */
+	spinlock_t lock;
+};
+
+static inline void adsp_ipc_set_data(struct mtk_adsp_ipc *ipc, void *data)
+{
+	if (!ipc)
+		return;
+
+	ipc->private_data = data;
+}
+
+static inline void *adsp_ipc_get_data(struct mtk_adsp_ipc *ipc)
+{
+	if (!ipc)
+		return NULL;
+
+	return ipc->private_data;
+}
+
+int adsp_ipc_send(struct mtk_adsp_ipc *ipc, unsigned int idx, uint32_t op);
+
+#endif /* MTK_ADSP_IPC_H */
-- 
2.18.0


_______________________________________________
Linux-mediatek mailing list
Linux-mediatek@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-mediatek

^ permalink raw reply related	[flat|nested] 14+ messages in thread
end of thread, other threads:[~2021-11-18 16:41 UTC | newest]

Thread overview: 14+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-11-17 13:12 [PATCH 0/3] Mediatek MT8195 ADSP IPC support allen-kh.cheng
2021-11-17 13:12 ` allen-kh.cheng
2021-11-17 13:12 ` allen-kh.cheng
2021-11-17 13:12 ` [PATCH 1/3] dt-bindings: mediatek: add adsp-mbox document allen-kh.cheng
2021-11-17 13:12   ` allen-kh.cheng
2021-11-17 13:12   ` allen-kh.cheng
2021-11-17 13:12 ` [PATCH 2/3] mailbox: mediatek: add support for adsp mailbox controller allen-kh.cheng
2021-11-17 13:12   ` allen-kh.cheng
2021-11-17 13:12   ` allen-kh.cheng
2021-11-17 13:12 ` [PATCH 3/3] firmware: mediatek: add adsp ipc protocol interface allen-kh.cheng
2021-11-17 13:12   ` allen-kh.cheng
2021-11-17 13:12   ` allen-kh.cheng
  -- strict thread matches above, loose matches on Subject: below --
2021-10-28 13:28 allen-kh.cheng
2021-10-28 13:28 ` allen-kh.cheng

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