From: Deepak Kumar Singh <deesin@codeaurora.org>
To: bjorn.andersson@linaro.org, clew@codeaurora.org,
mathieu.poirier@linaro.org
Cc: linux-arm-msm@vger.kernel.org, linux-remoteproc@vger.kernel.org,
linux-kernel@vger.kernel.org,
Arun Kumar Neelakantam <aneela@codeaurora.org>,
Deepak Kumar Singh <deesin@codeaurora.org>
Subject: [PATCH V6 3/4] rpmsg: char: Add TIOCMGET/TIOCMSET ioctl support
Date: Fri, 26 Jun 2020 20:16:58 +0530 [thread overview]
Message-ID: <1593182819-30747-4-git-send-email-deesin@codeaurora.org> (raw)
In-Reply-To: <1593182819-30747-1-git-send-email-deesin@codeaurora.org>
From: Arun Kumar Neelakantam <aneela@codeaurora.org>
Add TICOMGET and TIOCMSET ioctl support for rpmsg char device nodes
to get/set the low level transport signals.
Signed-off-by: Deepak Kumar Singh <deesin@codeaurora.org>
Signed-off-by: Arun Kumar Neelakantam <aneela@codeaurora.org>
---
drivers/rpmsg/rpmsg_char.c | 54 +++++++++++++++++++++++++++++++++++++++++++---
1 file changed, 51 insertions(+), 3 deletions(-)
diff --git a/drivers/rpmsg/rpmsg_char.c b/drivers/rpmsg/rpmsg_char.c
index 4bbbacd..43ceac0 100644
--- a/drivers/rpmsg/rpmsg_char.c
+++ b/drivers/rpmsg/rpmsg_char.c
@@ -1,5 +1,6 @@
// SPDX-License-Identifier: GPL-2.0
/*
+ * Copyright (c) 2018, The Linux Foundation.
* Copyright (c) 2016, Linaro Ltd.
* Copyright (c) 2012, Michal Simek <monstr@monstr.eu>
* Copyright (c) 2012, PetaLogix
@@ -19,6 +20,7 @@
#include <linux/rpmsg.h>
#include <linux/skbuff.h>
#include <linux/slab.h>
+#include <linux/termios.h>
#include <linux/uaccess.h>
#include <uapi/linux/rpmsg.h>
@@ -269,15 +271,61 @@ static __poll_t rpmsg_eptdev_poll(struct file *filp, poll_table *wait)
return mask;
}
+static int rpmsg_eptdev_tiocmset(struct file *fp, unsigned int cmd,
+ int __user *arg)
+{
+ struct rpmsg_eptdev *eptdev = fp->private_data;
+ u32 set, clear, val;
+ int ret;
+
+ ret = get_user(val, arg);
+ if (ret)
+ return ret;
+ set = clear = 0;
+ switch (cmd) {
+ case TIOCMBIS:
+ set = val;
+ break;
+ case TIOCMBIC:
+ clear = val;
+ break;
+ case TIOCMSET:
+ set = val;
+ clear = ~val;
+ break;
+ }
+
+ set &= TIOCM_DTR | TIOCM_RTS | TIOCM_CD | TIOCM_RI;
+ clear &= TIOCM_DTR | TIOCM_RTS | TIOCM_CD | TIOCM_RI;
+
+ return rpmsg_set_signals(eptdev->ept, set, clear);
+}
+
static long rpmsg_eptdev_ioctl(struct file *fp, unsigned int cmd,
unsigned long arg)
{
struct rpmsg_eptdev *eptdev = fp->private_data;
+ int ret;
- if (cmd != RPMSG_DESTROY_EPT_IOCTL)
- return -EINVAL;
+ switch (cmd) {
+ case TIOCMGET:
+ ret = rpmsg_get_signals(eptdev->ept);
+ if (ret >= 0)
+ ret = put_user(ret, (int __user *)arg);
+ break;
+ case TIOCMSET:
+ case TIOCMBIS:
+ case TIOCMBIC:
+ ret = rpmsg_eptdev_tiocmset(fp, cmd, (int __user *)arg);
+ break;
+ case RPMSG_DESTROY_EPT_IOCTL:
+ ret = rpmsg_eptdev_destroy(&eptdev->dev, NULL);
+ break;
+ default:
+ ret = -EINVAL;
+ }
- return rpmsg_eptdev_destroy(&eptdev->dev, NULL);
+ return ret;
}
static const struct file_operations rpmsg_eptdev_fops = {
--
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project
next prev parent reply other threads:[~2020-06-26 14:47 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-26 14:46 [PATCH V5 0/4] Signaling api support in glink/rpmsg clients Deepak Kumar Singh
2020-06-26 14:46 ` [PATCH V6 1/4] rpmsg: core: Add signal API support Deepak Kumar Singh
2021-05-06 17:18 ` Deepak Kumar Singh
2020-06-26 14:46 ` [PATCH V6 2/4] rpmsg: glink: Add support to handle signals command Deepak Kumar Singh
2021-05-06 17:17 ` Deepak Kumar Singh
2020-06-26 14:46 ` Deepak Kumar Singh [this message]
2020-06-26 14:46 ` [PATCH V6 4/4] rpmsg: char: Add signal callback and POLLPRI support Deepak Kumar Singh
2020-07-06 18:04 ` [PATCH V5 0/4] Signaling api support in glink/rpmsg clients Mathieu Poirier
2020-09-02 16:30 ` Deepak Kumar Singh
2020-09-02 16:40 ` Mathieu Poirier
2021-05-06 17:06 [PATCH V3 0/2] soc: qcom: aoss: Expose send for generic usecase Deepak Kumar Singh
2021-05-06 17:06 ` [PATCH V3 1/2] " Deepak Kumar Singh
2021-05-28 3:32 ` Bjorn Andersson
2021-06-07 11:42 ` Sibi Sankar
2021-05-06 17:06 ` [PATCH V3 2/2] soc: qcom: aoss: Add debugfs entry Deepak Kumar Singh
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