mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 02:39:48 +00:00
![Niklas Cassel](/assets/img/avatar_default.png)
'chinfo.name' is used as a NUL-terminated string, but using strncpy() with the length equal to the buffer size may result in lack of the termination: drivers//soc/qcom/wcnss_ctrl.c: In function 'qcom_wcnss_open_channel': drivers//soc/qcom/wcnss_ctrl.c:284:2: warning: 'strncpy' specified bound 32 equals destination size [-Wstringop-truncation] strncpy(chinfo.name, name, sizeof(chinfo.name)); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ This changes it to use the safer strscpy() instead. Signed-off-by: Niklas Cassel <niklas.cassel@linaro.org> Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> Signed-off-by: Andy Gross <andy.gross@linaro.org>
366 lines
8.7 KiB
C
366 lines
8.7 KiB
C
/*
|
|
* Copyright (c) 2016, Linaro Ltd.
|
|
* Copyright (c) 2015, Sony Mobile Communications Inc.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 and
|
|
* only version 2 as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*/
|
|
#include <linux/firmware.h>
|
|
#include <linux/module.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/io.h>
|
|
#include <linux/of_platform.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/rpmsg.h>
|
|
#include <linux/soc/qcom/wcnss_ctrl.h>
|
|
|
|
#define WCNSS_REQUEST_TIMEOUT (5 * HZ)
|
|
#define WCNSS_CBC_TIMEOUT (10 * HZ)
|
|
|
|
#define WCNSS_ACK_DONE_BOOTING 1
|
|
#define WCNSS_ACK_COLD_BOOTING 2
|
|
|
|
#define NV_FRAGMENT_SIZE 3072
|
|
#define NVBIN_FILE "wlan/prima/WCNSS_qcom_wlan_nv.bin"
|
|
|
|
/**
|
|
* struct wcnss_ctrl - driver context
|
|
* @dev: device handle
|
|
* @channel: SMD channel handle
|
|
* @ack: completion for outstanding requests
|
|
* @cbc: completion for cbc complete indication
|
|
* @ack_status: status of the outstanding request
|
|
* @probe_work: worker for uploading nv binary
|
|
*/
|
|
struct wcnss_ctrl {
|
|
struct device *dev;
|
|
struct rpmsg_endpoint *channel;
|
|
|
|
struct completion ack;
|
|
struct completion cbc;
|
|
int ack_status;
|
|
|
|
struct work_struct probe_work;
|
|
};
|
|
|
|
/* message types */
|
|
enum {
|
|
WCNSS_VERSION_REQ = 0x01000000,
|
|
WCNSS_VERSION_RESP,
|
|
WCNSS_DOWNLOAD_NV_REQ,
|
|
WCNSS_DOWNLOAD_NV_RESP,
|
|
WCNSS_UPLOAD_CAL_REQ,
|
|
WCNSS_UPLOAD_CAL_RESP,
|
|
WCNSS_DOWNLOAD_CAL_REQ,
|
|
WCNSS_DOWNLOAD_CAL_RESP,
|
|
WCNSS_VBAT_LEVEL_IND,
|
|
WCNSS_BUILD_VERSION_REQ,
|
|
WCNSS_BUILD_VERSION_RESP,
|
|
WCNSS_PM_CONFIG_REQ,
|
|
WCNSS_CBC_COMPLETE_IND,
|
|
};
|
|
|
|
/**
|
|
* struct wcnss_msg_hdr - common packet header for requests and responses
|
|
* @type: packet message type
|
|
* @len: total length of the packet, including this header
|
|
*/
|
|
struct wcnss_msg_hdr {
|
|
u32 type;
|
|
u32 len;
|
|
} __packed;
|
|
|
|
/**
|
|
* struct wcnss_version_resp - version request response
|
|
* @hdr: common packet wcnss_msg_hdr header
|
|
*/
|
|
struct wcnss_version_resp {
|
|
struct wcnss_msg_hdr hdr;
|
|
u8 major;
|
|
u8 minor;
|
|
u8 version;
|
|
u8 revision;
|
|
} __packed;
|
|
|
|
/**
|
|
* struct wcnss_download_nv_req - firmware fragment request
|
|
* @hdr: common packet wcnss_msg_hdr header
|
|
* @seq: sequence number of this fragment
|
|
* @last: boolean indicator of this being the last fragment of the binary
|
|
* @frag_size: length of this fragment
|
|
* @fragment: fragment data
|
|
*/
|
|
struct wcnss_download_nv_req {
|
|
struct wcnss_msg_hdr hdr;
|
|
u16 seq;
|
|
u16 last;
|
|
u32 frag_size;
|
|
u8 fragment[];
|
|
} __packed;
|
|
|
|
/**
|
|
* struct wcnss_download_nv_resp - firmware download response
|
|
* @hdr: common packet wcnss_msg_hdr header
|
|
* @status: boolean to indicate success of the download
|
|
*/
|
|
struct wcnss_download_nv_resp {
|
|
struct wcnss_msg_hdr hdr;
|
|
u8 status;
|
|
} __packed;
|
|
|
|
/**
|
|
* wcnss_ctrl_smd_callback() - handler from SMD responses
|
|
* @channel: smd channel handle
|
|
* @data: pointer to the incoming data packet
|
|
* @count: size of the incoming data packet
|
|
*
|
|
* Handles any incoming packets from the remote WCNSS_CTRL service.
|
|
*/
|
|
static int wcnss_ctrl_smd_callback(struct rpmsg_device *rpdev,
|
|
void *data,
|
|
int count,
|
|
void *priv,
|
|
u32 addr)
|
|
{
|
|
struct wcnss_ctrl *wcnss = dev_get_drvdata(&rpdev->dev);
|
|
const struct wcnss_download_nv_resp *nvresp;
|
|
const struct wcnss_version_resp *version;
|
|
const struct wcnss_msg_hdr *hdr = data;
|
|
|
|
switch (hdr->type) {
|
|
case WCNSS_VERSION_RESP:
|
|
if (count != sizeof(*version)) {
|
|
dev_err(wcnss->dev,
|
|
"invalid size of version response\n");
|
|
break;
|
|
}
|
|
|
|
version = data;
|
|
dev_info(wcnss->dev, "WCNSS Version %d.%d %d.%d\n",
|
|
version->major, version->minor,
|
|
version->version, version->revision);
|
|
|
|
complete(&wcnss->ack);
|
|
break;
|
|
case WCNSS_DOWNLOAD_NV_RESP:
|
|
if (count != sizeof(*nvresp)) {
|
|
dev_err(wcnss->dev,
|
|
"invalid size of download response\n");
|
|
break;
|
|
}
|
|
|
|
nvresp = data;
|
|
wcnss->ack_status = nvresp->status;
|
|
complete(&wcnss->ack);
|
|
break;
|
|
case WCNSS_CBC_COMPLETE_IND:
|
|
dev_dbg(wcnss->dev, "cold boot complete\n");
|
|
complete(&wcnss->cbc);
|
|
break;
|
|
default:
|
|
dev_info(wcnss->dev, "unknown message type %d\n", hdr->type);
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* wcnss_request_version() - send a version request to WCNSS
|
|
* @wcnss: wcnss ctrl driver context
|
|
*/
|
|
static int wcnss_request_version(struct wcnss_ctrl *wcnss)
|
|
{
|
|
struct wcnss_msg_hdr msg;
|
|
int ret;
|
|
|
|
msg.type = WCNSS_VERSION_REQ;
|
|
msg.len = sizeof(msg);
|
|
ret = rpmsg_send(wcnss->channel, &msg, sizeof(msg));
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = wait_for_completion_timeout(&wcnss->ack, WCNSS_CBC_TIMEOUT);
|
|
if (!ret) {
|
|
dev_err(wcnss->dev, "timeout waiting for version response\n");
|
|
return -ETIMEDOUT;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* wcnss_download_nv() - send nv binary to WCNSS
|
|
* @wcnss: wcnss_ctrl state handle
|
|
* @expect_cbc: indicator to caller that an cbc event is expected
|
|
*
|
|
* Returns 0 on success. Negative errno on failure.
|
|
*/
|
|
static int wcnss_download_nv(struct wcnss_ctrl *wcnss, bool *expect_cbc)
|
|
{
|
|
struct wcnss_download_nv_req *req;
|
|
const struct firmware *fw;
|
|
const void *data;
|
|
ssize_t left;
|
|
int ret;
|
|
|
|
req = kzalloc(sizeof(*req) + NV_FRAGMENT_SIZE, GFP_KERNEL);
|
|
if (!req)
|
|
return -ENOMEM;
|
|
|
|
ret = request_firmware(&fw, NVBIN_FILE, wcnss->dev);
|
|
if (ret < 0) {
|
|
dev_err(wcnss->dev, "Failed to load nv file %s: %d\n",
|
|
NVBIN_FILE, ret);
|
|
goto free_req;
|
|
}
|
|
|
|
data = fw->data;
|
|
left = fw->size;
|
|
|
|
req->hdr.type = WCNSS_DOWNLOAD_NV_REQ;
|
|
req->hdr.len = sizeof(*req) + NV_FRAGMENT_SIZE;
|
|
|
|
req->last = 0;
|
|
req->frag_size = NV_FRAGMENT_SIZE;
|
|
|
|
req->seq = 0;
|
|
do {
|
|
if (left <= NV_FRAGMENT_SIZE) {
|
|
req->last = 1;
|
|
req->frag_size = left;
|
|
req->hdr.len = sizeof(*req) + left;
|
|
}
|
|
|
|
memcpy(req->fragment, data, req->frag_size);
|
|
|
|
ret = rpmsg_send(wcnss->channel, req, req->hdr.len);
|
|
if (ret < 0) {
|
|
dev_err(wcnss->dev, "failed to send smd packet\n");
|
|
goto release_fw;
|
|
}
|
|
|
|
/* Increment for next fragment */
|
|
req->seq++;
|
|
|
|
data += NV_FRAGMENT_SIZE;
|
|
left -= NV_FRAGMENT_SIZE;
|
|
} while (left > 0);
|
|
|
|
ret = wait_for_completion_timeout(&wcnss->ack, WCNSS_REQUEST_TIMEOUT);
|
|
if (!ret) {
|
|
dev_err(wcnss->dev, "timeout waiting for nv upload ack\n");
|
|
ret = -ETIMEDOUT;
|
|
} else {
|
|
*expect_cbc = wcnss->ack_status == WCNSS_ACK_COLD_BOOTING;
|
|
ret = 0;
|
|
}
|
|
|
|
release_fw:
|
|
release_firmware(fw);
|
|
free_req:
|
|
kfree(req);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* qcom_wcnss_open_channel() - open additional SMD channel to WCNSS
|
|
* @wcnss: wcnss handle, retrieved from drvdata
|
|
* @name: SMD channel name
|
|
* @cb: callback to handle incoming data on the channel
|
|
*/
|
|
struct rpmsg_endpoint *qcom_wcnss_open_channel(void *wcnss, const char *name, rpmsg_rx_cb_t cb, void *priv)
|
|
{
|
|
struct rpmsg_channel_info chinfo;
|
|
struct wcnss_ctrl *_wcnss = wcnss;
|
|
|
|
strscpy(chinfo.name, name, sizeof(chinfo.name));
|
|
chinfo.src = RPMSG_ADDR_ANY;
|
|
chinfo.dst = RPMSG_ADDR_ANY;
|
|
|
|
return rpmsg_create_ept(_wcnss->channel->rpdev, cb, priv, chinfo);
|
|
}
|
|
EXPORT_SYMBOL(qcom_wcnss_open_channel);
|
|
|
|
static void wcnss_async_probe(struct work_struct *work)
|
|
{
|
|
struct wcnss_ctrl *wcnss = container_of(work, struct wcnss_ctrl, probe_work);
|
|
bool expect_cbc;
|
|
int ret;
|
|
|
|
ret = wcnss_request_version(wcnss);
|
|
if (ret < 0)
|
|
return;
|
|
|
|
ret = wcnss_download_nv(wcnss, &expect_cbc);
|
|
if (ret < 0)
|
|
return;
|
|
|
|
/* Wait for pending cold boot completion if indicated by the nv downloader */
|
|
if (expect_cbc) {
|
|
ret = wait_for_completion_timeout(&wcnss->cbc, WCNSS_REQUEST_TIMEOUT);
|
|
if (!ret)
|
|
dev_err(wcnss->dev, "expected cold boot completion\n");
|
|
}
|
|
|
|
of_platform_populate(wcnss->dev->of_node, NULL, NULL, wcnss->dev);
|
|
}
|
|
|
|
static int wcnss_ctrl_probe(struct rpmsg_device *rpdev)
|
|
{
|
|
struct wcnss_ctrl *wcnss;
|
|
|
|
wcnss = devm_kzalloc(&rpdev->dev, sizeof(*wcnss), GFP_KERNEL);
|
|
if (!wcnss)
|
|
return -ENOMEM;
|
|
|
|
wcnss->dev = &rpdev->dev;
|
|
wcnss->channel = rpdev->ept;
|
|
|
|
init_completion(&wcnss->ack);
|
|
init_completion(&wcnss->cbc);
|
|
INIT_WORK(&wcnss->probe_work, wcnss_async_probe);
|
|
|
|
dev_set_drvdata(&rpdev->dev, wcnss);
|
|
|
|
schedule_work(&wcnss->probe_work);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void wcnss_ctrl_remove(struct rpmsg_device *rpdev)
|
|
{
|
|
struct wcnss_ctrl *wcnss = dev_get_drvdata(&rpdev->dev);
|
|
|
|
cancel_work_sync(&wcnss->probe_work);
|
|
of_platform_depopulate(&rpdev->dev);
|
|
}
|
|
|
|
static const struct of_device_id wcnss_ctrl_of_match[] = {
|
|
{ .compatible = "qcom,wcnss", },
|
|
{}
|
|
};
|
|
MODULE_DEVICE_TABLE(of, wcnss_ctrl_of_match);
|
|
|
|
static struct rpmsg_driver wcnss_ctrl_driver = {
|
|
.probe = wcnss_ctrl_probe,
|
|
.remove = wcnss_ctrl_remove,
|
|
.callback = wcnss_ctrl_smd_callback,
|
|
.drv = {
|
|
.name = "qcom_wcnss_ctrl",
|
|
.owner = THIS_MODULE,
|
|
.of_match_table = wcnss_ctrl_of_match,
|
|
},
|
|
};
|
|
|
|
module_rpmsg_driver(wcnss_ctrl_driver);
|
|
|
|
MODULE_DESCRIPTION("Qualcomm WCNSS control driver");
|
|
MODULE_LICENSE("GPL v2");
|