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[4/5] standard-headers: virtio-gpio protocol headers

Message ID 20201127182917.2387-4-info@metux.net (mailing list archive)
State New, archived
Headers show
Series [1/5] scripts: minikconf: support config titles | expand

Commit Message

Enrico Weigelt, metux IT consult Nov. 27, 2020, 6:29 p.m. UTC 
Introduce virtio-gpio protocol headers from Linux kernel.
(work in progress, not mainlined yet)

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
---
 include/standard-headers/linux/virtio_gpio.h | 39 ++++++++++++++++++++++++++++
 include/standard-headers/linux/virtio_ids.h  |  1 +
 2 files changed, 40 insertions(+)
 create mode 100644 include/standard-headers/linux/virtio_gpio.h
diff mbox series

Patch

diff --git a/include/standard-headers/linux/virtio_gpio.h b/include/standard-headers/linux/virtio_gpio.h
new file mode 100644
index 0000000000..d1db0ef1fe
--- /dev/null
+++ b/include/standard-headers/linux/virtio_gpio.h
@@ -0,0 +1,39 @@ 
+// SPDX-License-Identifier: GPL-2.0+
+
+#ifndef _LINUX_VIRTIO_GPIO_H
+#define _LINUX_VIRTIO_GPIO_H
+
+#include <linux/types.h>
+
+enum virtio_gpio_event_type {
+	// requests from quest to host
+	VIRTIO_GPIO_EV_GUEST_REQUEST		= 0x01,	// ->request()
+	VIRTIO_GPIO_EV_GUEST_DIRECTION_INPUT	= 0x02,	// ->direction_input()
+	VIRTIO_GPIO_EV_GUEST_DIRECTION_OUTPUT	= 0x03,	// ->direction_output()
+	VIRTIO_GPIO_EV_GUEST_GET_DIRECTION	= 0x04,	// ->get_direction()
+	VIRTIO_GPIO_EV_GUEST_GET_VALUE		= 0x05,	// ->get_value()
+	VIRTIO_GPIO_EV_GUEST_SET_VALUE		= 0x06,	// ->set_value()
+
+	// messages from host to guest
+	VIRTIO_GPIO_EV_HOST_LEVEL		= 0x11,	// gpio state changed
+
+	/* mask bit set on host->guest reply */
+	VIRTIO_GPIO_EV_REPLY			= 0xF000,
+};
+
+struct virtio_gpio_config {
+	__u8    version;
+	__u8    reserved0;
+	__u16   num_gpios;
+	__u32   names_size;
+	__u8    reserved1[24];
+	__u8    name[32];
+};
+
+struct virtio_gpio_event {
+	__le16 type;
+	__le16 pin;
+	__le32 value;
+};
+
+#endif /* _LINUX_VIRTIO_GPIO_H */
diff --git a/include/standard-headers/linux/virtio_ids.h b/include/standard-headers/linux/virtio_ids.h
index b052355ac7..053fe59c73 100644
--- a/include/standard-headers/linux/virtio_ids.h
+++ b/include/standard-headers/linux/virtio_ids.h
@@ -48,5 +48,6 @@ 
 #define VIRTIO_ID_FS           26 /* virtio filesystem */
 #define VIRTIO_ID_PMEM         27 /* virtio pmem */
 #define VIRTIO_ID_MAC80211_HWSIM 29 /* virtio mac80211-hwsim */
+#define VIRTIO_ID_GPIO		 30 /* virtio GPIO */
 
 #endif /* _LINUX_VIRTIO_IDS_H */