diff options
Diffstat (limited to 'meta-arm/meta-arm-bsp/recipes-kernel/linux/files/corstone1000/0003-Add-rpmsg-driver-for-corstone1000.patch')
| -rw-r--r-- | meta-arm/meta-arm-bsp/recipes-kernel/linux/files/corstone1000/0003-Add-rpmsg-driver-for-corstone1000.patch | 218 |
1 files changed, 0 insertions, 218 deletions
diff --git a/meta-arm/meta-arm-bsp/recipes-kernel/linux/files/corstone1000/0003-Add-rpmsg-driver-for-corstone1000.patch b/meta-arm/meta-arm-bsp/recipes-kernel/linux/files/corstone1000/0003-Add-rpmsg-driver-for-corstone1000.patch deleted file mode 100644 index cd9cec2700..0000000000 --- a/meta-arm/meta-arm-bsp/recipes-kernel/linux/files/corstone1000/0003-Add-rpmsg-driver-for-corstone1000.patch +++ /dev/null @@ -1,218 +0,0 @@ -From a834f4e143ff647e7677dc60ab57ee5883f3ac8f Mon Sep 17 00:00:00 2001 -From: Emekcan <emekcan.aras@arm.com> -Date: Wed, 17 Aug 2022 14:21:42 +0100 -Subject: [PATCH] Add rpmsg driver for corstone1000 - -Adds rpmsg driver to communicate with external -system in corstone1000 platform. - -Upstream-Status: Pending -Signed-off-by: Emekcan Aras <emekcan.aras@arm.com> -Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org> ---- - drivers/rpmsg/Kconfig | 10 ++ - drivers/rpmsg/Makefile | 1 + - drivers/rpmsg/rpmsg_arm_mailbox.c | 164 ++++++++++++++++++++++++++++++ - 3 files changed, 175 insertions(+) - create mode 100644 drivers/rpmsg/rpmsg_arm_mailbox.c - -diff --git a/drivers/rpmsg/Kconfig b/drivers/rpmsg/Kconfig -index d3795860f5c0..fc6916d7b523 100644 ---- a/drivers/rpmsg/Kconfig -+++ b/drivers/rpmsg/Kconfig -@@ -81,4 +81,14 @@ config RPMSG_VIRTIO - select RPMSG_NS - select VIRTIO - -+config RPMSG_ARM -+ tristate "ARM RPMSG driver" -+ select RPMSG -+ depends on HAS_IOMEM -+ depends on MAILBOX -+ help -+ Say y here to enable support for rpmsg lient driver which is built -+ around mailbox client using Arm MHUv2.1 as physical medium.This -+ driver enables communication which remote processor using MHU. -+ - endmenu -diff --git a/drivers/rpmsg/Makefile b/drivers/rpmsg/Makefile -index 58e3b382e316..6bdcc69688b2 100644 ---- a/drivers/rpmsg/Makefile -+++ b/drivers/rpmsg/Makefile -@@ -1,5 +1,6 @@ - # SPDX-License-Identifier: GPL-2.0 - obj-$(CONFIG_RPMSG) += rpmsg_core.o -+obj-$(CONFIG_RPMSG_ARM) += rpmsg_arm_mailbox.o - obj-$(CONFIG_RPMSG_CHAR) += rpmsg_char.o - obj-$(CONFIG_RPMSG_CTRL) += rpmsg_ctrl.o - obj-$(CONFIG_RPMSG_NS) += rpmsg_ns.o -diff --git a/drivers/rpmsg/rpmsg_arm_mailbox.c b/drivers/rpmsg/rpmsg_arm_mailbox.c -new file mode 100644 -index 000000000000..4a80102669f6 ---- /dev/null -+++ b/drivers/rpmsg/rpmsg_arm_mailbox.c -@@ -0,0 +1,164 @@ -+// SPDX-License-Identifier: GPL-2.0 -+/* -+ * rpmsg client driver using mailbox client interface -+ * -+ * Copyright (C) 2019 ARM Ltd. -+ * -+ */ -+ -+#include <linux/bitmap.h> -+#include <linux/export.h> -+#include <linux/io.h> -+#include <linux/kernel.h> -+#include <linux/ktime.h> -+#include <linux/mailbox_client.h> -+#include <linux/module.h> -+#include <linux/of_address.h> -+#include <linux/of_device.h> -+#include <linux/processor.h> -+#include <linux/semaphore.h> -+#include <linux/slab.h> -+#include <linux/rpmsg.h> -+#include "rpmsg_internal.h" -+#include <linux/mailbox/arm_mhuv2_message.h> -+ -+#define RPMSG_NAME "arm_rpmsg" -+#define RPMSG_ADDR_ANY 0xFFFFFFFF -+ -+struct arm_channel { -+ struct rpmsg_endpoint ept; -+ struct mbox_client cl; -+ struct mbox_chan *mbox; -+}; -+ -+#define arm_channel_from_rpmsg(_ept) container_of(_ept, struct arm_channel, ept) -+#define arm_channel_from_mbox(_ept) container_of(_ept, struct arm_channel, cl) -+ -+ -+static void arm_msg_rx_handler(struct mbox_client *cl, void *mssg) -+{ -+ struct arm_mhuv2_mbox_msg *msg = mssg; -+ struct arm_channel* channel = arm_channel_from_mbox(cl); -+ int err = channel->ept.cb(channel->ept.rpdev, msg->data, 4, channel->ept.priv, RPMSG_ADDR_ANY); -+ if(err) { -+ printk("ARM Mailbox: Endpoint callback failed with error: %d", err); -+ } -+} -+ -+ -+static void arm_destroy_ept(struct rpmsg_endpoint *ept) -+{ -+ struct arm_channel *channel = arm_channel_from_rpmsg(ept); -+ mbox_free_channel(channel->mbox); -+ kfree(channel); -+} -+ -+static int arm_send(struct rpmsg_endpoint *ept, void *data, int len) -+{ -+ struct arm_channel *channel = arm_channel_from_rpmsg(ept); -+ -+ mbox_send_message(channel->mbox, data); -+ return 0; -+} -+ -+static int arm_sendto(struct rpmsg_endpoint *ept, void *data, int len, u32 dest) -+{ -+ struct arm_mhuv2_mbox_msg msg; -+ struct arm_channel *channel = arm_channel_from_rpmsg(ept); -+ msg.data = data; -+ msg.len = len; -+ mbox_send_message(channel->mbox, &msg); -+ return 0; -+} -+ -+ -+static const struct rpmsg_endpoint_ops arm_endpoint_ops = { -+ .destroy_ept = arm_destroy_ept, -+ .send = arm_send, -+ .sendto = arm_sendto, -+}; -+ -+ -+static struct rpmsg_endpoint *arm_create_ept(struct rpmsg_device *rpdev, -+ rpmsg_rx_cb_t cb, void *priv, struct rpmsg_channel_info chinfo) -+{ -+ struct arm_channel *channel; -+ -+ channel = kzalloc(sizeof(*channel), GFP_KERNEL); -+ -+ // Initialize rpmsg endpoint -+ kref_init(&channel->ept.refcount); -+ channel->ept.rpdev = rpdev; -+ channel->ept.cb = cb; -+ channel->ept.priv = priv; -+ channel->ept.ops = &arm_endpoint_ops; -+ -+ // Initialize mailbox client -+ channel->cl.dev = rpdev->dev.parent; -+ channel->cl.rx_callback = arm_msg_rx_handler; -+ channel->cl.tx_done = NULL; /* operate in blocking mode */ -+ channel->cl.tx_block = true; -+ channel->cl.tx_tout = 500; /* by half a second */ -+ channel->cl.knows_txdone = false; /* depending upon protocol */ -+ -+ channel->mbox = mbox_request_channel_byname(&channel->cl, chinfo.name); -+ if (IS_ERR_OR_NULL(channel->mbox)) { -+ printk("RPMsg ARM: Cannot get channel by name: '%s'\n", chinfo.name); -+ return -1; -+ } -+ -+ return &channel->ept; -+} -+ -+static const struct rpmsg_device_ops arm_device_ops = { -+ .create_ept = arm_create_ept, -+}; -+ -+ -+static void arm_release_device(struct device *dev) -+{ -+ struct rpmsg_device *rpdev = to_rpmsg_device(dev); -+ -+ kfree(rpdev); -+} -+ -+ -+static int client_probe(struct platform_device *pdev) -+{ -+ struct device *dev = &pdev->dev; -+ struct rpmsg_device *rpdev; -+ -+ rpdev = kzalloc(sizeof(*rpdev), GFP_KERNEL); -+ if (!rpdev) -+ return -ENOMEM; -+ -+ /* Assign callbacks for rpmsg_device */ -+ rpdev->ops = &arm_device_ops; -+ -+ /* Assign public information to the rpmsg_device */ -+ memcpy(rpdev->id.name, RPMSG_NAME, strlen(RPMSG_NAME)); -+ -+ rpdev->dev.parent = dev; -+ rpdev->dev.release = arm_release_device; -+ -+ return rpmsg_chrdev_register_device(rpdev); -+} -+ -+static const struct of_device_id client_of_match[] = { -+ { .compatible = "arm,client", .data = NULL }, -+ { /* Sentinel */ }, -+}; -+ -+static struct platform_driver client_driver = { -+ .driver = { -+ .name = "arm-mhu-client", -+ .of_match_table = client_of_match, -+ }, -+ .probe = client_probe, -+}; -+ -+module_platform_driver(client_driver); -+ -+MODULE_LICENSE("GPL v2"); -+MODULE_DESCRIPTION("ARM RPMSG Driver"); -+MODULE_AUTHOR("Tushar Khandelwal <tushar.khandelwal@arm.com>"); |