259 lines
6.6 KiB
C
259 lines
6.6 KiB
C
/*
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* Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
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* Copyright (c) 2020-2021 Huawei Device Co., Ltd. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this list of
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* conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice, this list
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* of conditions and the following disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its contributors may be used
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* to endorse or promote products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "virtual_serial.h"
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#include "fcntl.h"
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#ifdef LOSCFG_FILE_MODE
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#include "stdarg.h"
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#endif
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#ifdef LOSCFG_FS_VFS
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#include "console.h"
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#endif
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#include "fs/path_cache.h"
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STATIC volatile UINT32 g_serialType = 0;
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STATIC struct file g_serialFilep;
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UINT32 SerialTypeGet(VOID)
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{
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return g_serialType;
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}
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STATIC VOID SerialTypeSet(const CHAR *deviceName)
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{
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if (!strncmp(deviceName, SERIAL_UARTDEV, strlen(SERIAL_UARTDEV))) {
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g_serialType = SERIAL_TYPE_UART_DEV;
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} else if (!strncmp(deviceName, SERIAL_TTYGS0, strlen(SERIAL_TTYGS0))) {
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g_serialType = SERIAL_TYPE_USBTTY_DEV;
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}
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}
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STATIC INT32 SerialOpen(struct file *filep)
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{
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INT32 ret;
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struct file *privFilep = NULL;
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const struct file_operations_vfs *fileOps = NULL;
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ret = GetFilepOps(filep, &privFilep, &fileOps);
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if (ret != ENOERR) {
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ret = EINVAL;
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goto ERROUT;
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}
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ret = FilepOpen(privFilep, fileOps);
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if (ret < 0) {
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ret = EPERM;
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goto ERROUT;
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}
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if (g_serialType == SERIAL_TYPE_UART_DEV) {
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HalIrqUnmask(NUM_HAL_INTERRUPT_UART);
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}
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return ENOERR;
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ERROUT:
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set_errno(ret);
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return VFS_ERROR;
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}
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STATIC INT32 SerialClose(struct file *filep)
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{
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(VOID)filep;
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if (g_serialType == SERIAL_TYPE_UART_DEV) {
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HalIrqMask(NUM_HAL_INTERRUPT_UART);
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}
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#if defined(LOSCFG_DRIVERS_USB_SERIAL_GADGET) || defined(LOSCFG_DRIVERS_USB_ETH_SER_GADGET)
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else if (g_serialType == SERIAL_TYPE_USBTTY_DEV) {
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userial_mask_set(0);
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}
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#endif
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return ENOERR;
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}
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STATIC ssize_t SerialRead(struct file *filep, CHAR *buffer, size_t bufLen)
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{
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INT32 ret;
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struct file *privFilep = NULL;
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const struct file_operations_vfs *fileOps = NULL;
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ret = GetFilepOps(filep, &privFilep, &fileOps);
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if (ret != ENOERR) {
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ret = -EINVAL;
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goto ERROUT;
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}
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ret = FilepRead(privFilep, fileOps, buffer, bufLen);
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if (ret < 0) {
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goto ERROUT;
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}
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return ret;
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ERROUT:
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set_errno(-ret);
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return VFS_ERROR;
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}
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/* Note: do not add print function in this module! */
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STATIC ssize_t SerialWrite(struct file *filep, const CHAR *buffer, size_t bufLen)
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{
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INT32 ret;
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struct file *privFilep = NULL;
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const struct file_operations_vfs *fileOps = NULL;
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ret = GetFilepOps(filep, &privFilep, &fileOps);
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if (ret != ENOERR) {
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ret = -EINVAL;
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goto ERROUT;
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}
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ret = FilepWrite(privFilep, fileOps, buffer, bufLen);
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if (ret < 0) {
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goto ERROUT;
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}
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return ret;
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ERROUT:
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set_errno(-ret);
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return VFS_ERROR;
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}
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STATIC INT32 SerialIoctl(struct file *filep, INT32 cmd, unsigned long arg)
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{
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INT32 ret;
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struct file *privFilep = NULL;
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const struct file_operations_vfs *fileOps = NULL;
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ret = GetFilepOps(filep, &privFilep, &fileOps);
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if (ret != ENOERR) {
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ret = -EINVAL;
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goto ERROUT;
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}
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ret = FilepIoctl(privFilep, fileOps, cmd, arg);
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if (ret < 0) {
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goto ERROUT;
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}
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return ret;
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ERROUT:
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set_errno(-ret);
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return VFS_ERROR;
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}
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STATIC INT32 SerialPoll(struct file *filep, poll_table *fds)
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{
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INT32 ret;
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struct file *privFilep = NULL;
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const struct file_operations_vfs *fileOps = NULL;
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ret = GetFilepOps(filep, &privFilep, &fileOps);
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if (ret != ENOERR) {
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ret = -EINVAL;
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goto ERROUT;
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}
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ret = FilepPoll(privFilep, fileOps, fds);
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if (ret < 0) {
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goto ERROUT;
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}
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return ret;
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ERROUT:
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set_errno(-ret);
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return VFS_ERROR;
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}
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STATIC const struct file_operations_vfs g_serialDevOps = {
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SerialOpen, /* open */
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SerialClose, /* close */
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SerialRead, /* read */
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SerialWrite,
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NULL,
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SerialIoctl,
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NULL,
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#ifndef CONFIG_DISABLE_POLL
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SerialPoll,
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#endif
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NULL,
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};
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INT32 virtual_serial_init(const CHAR *deviceName)
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{
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INT32 ret;
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struct Vnode *vnode = NULL;
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if (deviceName == NULL) {
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ret = EINVAL;
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goto ERROUT;
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}
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SerialTypeSet(deviceName);
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VnodeHold();
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ret = VnodeLookup(deviceName, &vnode, V_DUMMY);
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if (ret != LOS_OK) {
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ret = EACCES;
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goto ERROUT;
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}
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(VOID)memset_s(&g_serialFilep, sizeof(struct file), 0, sizeof(struct file));
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g_serialFilep.f_oflags = O_RDWR;
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g_serialFilep.f_vnode = vnode;
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g_serialFilep.ops = ((struct drv_data *)vnode->data)->ops;
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if (g_serialFilep.ops->open != NULL) {
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(VOID)g_serialFilep.ops->open(&g_serialFilep);
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} else {
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ret = EFAULT;
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PRINTK("virtual_serial_init %s open is NULL\n", deviceName);
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goto ERROUT;
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}
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(VOID)register_driver(SERIAL, &g_serialDevOps, DEFFILEMODE, &g_serialFilep);
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VnodeDrop();
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return ENOERR;
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ERROUT:
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VnodeDrop();
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set_errno(ret);
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return VFS_ERROR;
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}
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INT32 virtual_serial_deinit(VOID)
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{
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return unregister_driver(SERIAL);
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}
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