Contributors: 19
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Björn Andersson |
837 |
74.20% |
8 |
27.59% |
| Stephen Boyd |
108 |
9.57% |
2 |
6.90% |
| Georgi Djakov |
68 |
6.03% |
1 |
3.45% |
| Konrad Dybcio |
21 |
1.86% |
3 |
10.34% |
| Andy Gross |
14 |
1.24% |
1 |
3.45% |
| devi priya |
7 |
0.62% |
1 |
3.45% |
| Shawn Guo |
7 |
0.62% |
1 |
3.45% |
| Iskren Chernev |
7 |
0.62% |
1 |
3.45% |
| Martin Botka |
7 |
0.62% |
1 |
3.45% |
| Kathiravan T |
7 |
0.62% |
1 |
3.45% |
| Bartosz Dudziak |
7 |
0.62% |
1 |
3.45% |
| Craig Tatlor |
7 |
0.62% |
1 |
3.45% |
| Stephan Gerhold |
7 |
0.62% |
1 |
3.45% |
| Vladimir Lypak |
7 |
0.62% |
1 |
3.45% |
| Angelo G. Del Regno |
7 |
0.62% |
1 |
3.45% |
| Gustavo A. R. Silva |
5 |
0.44% |
1 |
3.45% |
| Krzysztof Kozlowski |
2 |
0.18% |
1 |
3.45% |
| Thomas Gleixner |
2 |
0.18% |
1 |
3.45% |
| Rob Clark |
1 |
0.09% |
1 |
3.45% |
| Total |
1128 |
|
29 |
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2015, Sony Mobile Communications AB.
* Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
*/
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/of_platform.h>
#include <linux/io.h>
#include <linux/interrupt.h>
#include <linux/slab.h>
#include <linux/rpmsg.h>
#include <linux/soc/qcom/smd-rpm.h>
#define RPM_REQUEST_TIMEOUT (5 * HZ)
/**
* struct qcom_smd_rpm - state of the rpm device driver
* @rpm_channel: reference to the smd channel
* @icc: interconnect proxy device
* @dev: rpm device
* @ack: completion for acks
* @lock: mutual exclusion around the send/complete pair
* @ack_status: result of the rpm request
*/
struct qcom_smd_rpm {
struct rpmsg_endpoint *rpm_channel;
struct platform_device *icc;
struct device *dev;
struct completion ack;
struct mutex lock;
int ack_status;
};
/**
* struct qcom_rpm_header - header for all rpm requests and responses
* @service_type: identifier of the service
* @length: length of the payload
*/
struct qcom_rpm_header {
__le32 service_type;
__le32 length;
};
/**
* struct qcom_rpm_request - request message to the rpm
* @msg_id: identifier of the outgoing message
* @flags: active/sleep state flags
* @type: resource type
* @id: resource id
* @data_len: length of the payload following this header
*/
struct qcom_rpm_request {
__le32 msg_id;
__le32 flags;
__le32 type;
__le32 id;
__le32 data_len;
};
/**
* struct qcom_rpm_message - response message from the rpm
* @msg_type: indicator of the type of message
* @length: the size of this message, including the message header
* @msg_id: message id
* @message: textual message from the rpm
*
* Multiple of these messages can be stacked in an rpm message.
*/
struct qcom_rpm_message {
__le32 msg_type;
__le32 length;
union {
__le32 msg_id;
DECLARE_FLEX_ARRAY(u8, message);
};
};
#define RPM_SERVICE_TYPE_REQUEST 0x00716572 /* "req\0" */
#define RPM_MSG_TYPE_ERR 0x00727265 /* "err\0" */
#define RPM_MSG_TYPE_MSG_ID 0x2367736d /* "msg#" */
/**
* qcom_rpm_smd_write - write @buf to @type:@id
* @rpm: rpm handle
* @state: active/sleep state flags
* @type: resource type
* @id: resource identifier
* @buf: the data to be written
* @count: number of bytes in @buf
*/
int qcom_rpm_smd_write(struct qcom_smd_rpm *rpm,
int state,
u32 type, u32 id,
void *buf,
size_t count)
{
static unsigned msg_id = 1;
int left;
int ret;
struct {
struct qcom_rpm_header hdr;
struct qcom_rpm_request req;
u8 payload[];
} *pkt;
size_t size = sizeof(*pkt) + count;
/* SMD packets to the RPM may not exceed 256 bytes */
if (WARN_ON(size >= 256))
return -EINVAL;
pkt = kmalloc(size, GFP_ATOMIC);
if (!pkt)
return -ENOMEM;
mutex_lock(&rpm->lock);
pkt->hdr.service_type = cpu_to_le32(RPM_SERVICE_TYPE_REQUEST);
pkt->hdr.length = cpu_to_le32(sizeof(struct qcom_rpm_request) + count);
pkt->req.msg_id = cpu_to_le32(msg_id++);
pkt->req.flags = cpu_to_le32(state);
pkt->req.type = cpu_to_le32(type);
pkt->req.id = cpu_to_le32(id);
pkt->req.data_len = cpu_to_le32(count);
memcpy(pkt->payload, buf, count);
ret = rpmsg_send(rpm->rpm_channel, pkt, size);
if (ret)
goto out;
left = wait_for_completion_timeout(&rpm->ack, RPM_REQUEST_TIMEOUT);
if (!left)
ret = -ETIMEDOUT;
else
ret = rpm->ack_status;
out:
kfree(pkt);
mutex_unlock(&rpm->lock);
return ret;
}
EXPORT_SYMBOL(qcom_rpm_smd_write);
static int qcom_smd_rpm_callback(struct rpmsg_device *rpdev,
void *data,
int count,
void *priv,
u32 addr)
{
const struct qcom_rpm_header *hdr = data;
size_t hdr_length = le32_to_cpu(hdr->length);
const struct qcom_rpm_message *msg;
struct qcom_smd_rpm *rpm = dev_get_drvdata(&rpdev->dev);
const u8 *buf = data + sizeof(struct qcom_rpm_header);
const u8 *end = buf + hdr_length;
char msgbuf[32];
int status = 0;
u32 len, msg_length;
if (le32_to_cpu(hdr->service_type) != RPM_SERVICE_TYPE_REQUEST ||
hdr_length < sizeof(struct qcom_rpm_message)) {
dev_err(rpm->dev, "invalid request\n");
return 0;
}
while (buf < end) {
msg = (struct qcom_rpm_message *)buf;
msg_length = le32_to_cpu(msg->length);
switch (le32_to_cpu(msg->msg_type)) {
case RPM_MSG_TYPE_MSG_ID:
break;
case RPM_MSG_TYPE_ERR:
len = min_t(u32, ALIGN(msg_length, 4), sizeof(msgbuf));
memcpy_fromio(msgbuf, msg->message, len);
msgbuf[len - 1] = 0;
if (!strcmp(msgbuf, "resource does not exist"))
status = -ENXIO;
else
status = -EINVAL;
break;
}
buf = PTR_ALIGN(buf + 2 * sizeof(u32) + msg_length, 4);
}
rpm->ack_status = status;
complete(&rpm->ack);
return 0;
}
static int qcom_smd_rpm_probe(struct rpmsg_device *rpdev)
{
struct qcom_smd_rpm *rpm;
int ret;
rpm = devm_kzalloc(&rpdev->dev, sizeof(*rpm), GFP_KERNEL);
if (!rpm)
return -ENOMEM;
mutex_init(&rpm->lock);
init_completion(&rpm->ack);
rpm->dev = &rpdev->dev;
rpm->rpm_channel = rpdev->ept;
dev_set_drvdata(&rpdev->dev, rpm);
rpm->icc = platform_device_register_data(&rpdev->dev, "icc_smd_rpm", -1,
NULL, 0);
if (IS_ERR(rpm->icc))
return PTR_ERR(rpm->icc);
ret = of_platform_populate(rpdev->dev.of_node, NULL, NULL, &rpdev->dev);
if (ret)
platform_device_unregister(rpm->icc);
return ret;
}
static void qcom_smd_rpm_remove(struct rpmsg_device *rpdev)
{
struct qcom_smd_rpm *rpm = dev_get_drvdata(&rpdev->dev);
platform_device_unregister(rpm->icc);
of_platform_depopulate(&rpdev->dev);
}
static const struct of_device_id qcom_smd_rpm_of_match[] = {
{ .compatible = "qcom,rpm-apq8084" },
{ .compatible = "qcom,rpm-ipq6018" },
{ .compatible = "qcom,rpm-ipq9574" },
{ .compatible = "qcom,rpm-msm8226" },
{ .compatible = "qcom,rpm-msm8909" },
{ .compatible = "qcom,rpm-msm8916" },
{ .compatible = "qcom,rpm-msm8936" },
{ .compatible = "qcom,rpm-msm8953" },
{ .compatible = "qcom,rpm-msm8974" },
{ .compatible = "qcom,rpm-msm8976" },
{ .compatible = "qcom,rpm-msm8994" },
{ .compatible = "qcom,rpm-msm8996" },
{ .compatible = "qcom,rpm-msm8998" },
{ .compatible = "qcom,rpm-sdm660" },
{ .compatible = "qcom,rpm-sm6115" },
{ .compatible = "qcom,rpm-sm6125" },
{ .compatible = "qcom,rpm-sm6375" },
{ .compatible = "qcom,rpm-qcm2290" },
{ .compatible = "qcom,rpm-qcs404" },
{}
};
MODULE_DEVICE_TABLE(of, qcom_smd_rpm_of_match);
static struct rpmsg_driver qcom_smd_rpm_driver = {
.probe = qcom_smd_rpm_probe,
.remove = qcom_smd_rpm_remove,
.callback = qcom_smd_rpm_callback,
.drv = {
.name = "qcom_smd_rpm",
.of_match_table = qcom_smd_rpm_of_match,
},
};
static int __init qcom_smd_rpm_init(void)
{
return register_rpmsg_driver(&qcom_smd_rpm_driver);
}
arch_initcall(qcom_smd_rpm_init);
static void __exit qcom_smd_rpm_exit(void)
{
unregister_rpmsg_driver(&qcom_smd_rpm_driver);
}
module_exit(qcom_smd_rpm_exit);
MODULE_AUTHOR("Bjorn Andersson <bjorn.andersson@sonymobile.com>");
MODULE_DESCRIPTION("Qualcomm SMD backed RPM driver");
MODULE_LICENSE("GPL v2");