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https://github.com/linux-msm/qdl.git
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8c0fd741ee
During QRB2210 provisioning, a USB write failure has been observed early in the Firehose phase (first block write). This issue has been traced to a timeout during the USB bulk transfer of the Zero-Length Packet (ZLP). In some conditions, the ZLP transfer may take longer than the current timeout, up to approximately 1.7 seconds. The issue specifically occurs after a prior large eMMC write operation (e.g., during a previous QDL session). It could then be related to internal eMMC I/O operations or timing delays affecting the USB ack. To resolve this issue, we introduce a timeout parameter to the qdl_write function, consistent with the existing qdl_read, and we increase the timeout to 10 seconds for Firehose raw binary write operations to avoid 'false-positive' timeout. Signed-off-by: Loic Poulain <loic.poulain@oss.qualcomm.com>
70 lines
1.5 KiB
C
70 lines
1.5 KiB
C
// SPDX-License-Identifier: BSD-3-Clause
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/*
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* Copyright (c) 2025, Qualcomm Innovation Center, Inc. All rights reserved.
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*/
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#include <stdlib.h>
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#include "qdl.h"
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struct qdl_device *qdl_init(enum QDL_DEVICE_TYPE type)
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{
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if (type == QDL_DEVICE_USB)
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return usb_init();
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if (type == QDL_DEVICE_SIM)
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return sim_init();
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return NULL;
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}
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void qdl_deinit(struct qdl_device *qdl)
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{
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if (qdl)
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free(qdl);
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}
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void qdl_set_out_chunk_size(struct qdl_device *qdl, long size)
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{
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qdl->set_out_chunk_size(qdl, size);
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}
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int qdl_open(struct qdl_device *qdl, const char *serial)
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{
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return qdl->open(qdl, serial);
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}
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void qdl_close(struct qdl_device *qdl)
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{
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qdl->close(qdl);
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}
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/**
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* qdl_read() - Read a message from the device
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* @qdl: device handle
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* @buf: buffer to write the data into
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* @len: maximum length of data to be read
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* @timeout: timeout for the read, in milliseconds
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*
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* Returns: number of bytes read, might be zero for a ZLP
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* negative errno on failure (notably -ETIMEDOUT)
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*/
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int qdl_read(struct qdl_device *qdl, void *buf, size_t len, unsigned int timeout)
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{
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return qdl->read(qdl, buf, len, timeout);
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}
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/**
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* qdl_write() - Write a message from the device
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* @qdl: device handle
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* @buf: buffer with data to be written
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* @len: length of data to be written
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* @timeout: timeout for write, in milliseconds
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*
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* Returns: number of bytes read
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* negative errno on failure (notably -ETIMEDOUT)
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*/
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int qdl_write(struct qdl_device *qdl, const void *buf, size_t len, unsigned int timeout)
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{
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return qdl->write(qdl, buf, len, timeout);
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}
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