diff options
Diffstat (limited to 'src/device.c')
| -rw-r--r-- | src/device.c | 547 |
1 files changed, 0 insertions, 547 deletions
diff --git a/src/device.c b/src/device.c deleted file mode 100644 index 47482b50d3..0000000000 --- a/src/device.c +++ /dev/null @@ -1,547 +0,0 @@ -/* - * Copyright (c) 2006-2021, RT-Thread Development Team - * - * SPDX-License-Identifier: Apache-2.0 - * - * Change Logs: - * Date Author Notes - * 2007-01-21 Bernard the first version - * 2010-05-04 Bernard add rt_device_init implementation - * 2012-10-20 Bernard add device check in register function, - * provided by Rob <[email protected]> - * 2012-12-25 Bernard return RT_EOK if the device interface not exist. - * 2013-07-09 Grissiom add ref_count support - * 2016-04-02 Bernard fix the open_flag initialization issue. - * 2021-03-19 Meco Man remove rt_device_init_all() - */ - -#include <rtthread.h> -#ifdef RT_USING_POSIX_DEVIO -#include <rtdevice.h> /* for wqueue_init */ -#endif /* RT_USING_POSIX_DEVIO */ - -#ifdef RT_USING_DEVICE - -#ifdef RT_USING_DEVICE_OPS -#define device_init (dev->ops->init) -#define device_open (dev->ops->open) -#define device_close (dev->ops->close) -#define device_read (dev->ops->read) -#define device_write (dev->ops->write) -#define device_control (dev->ops->control) -#else -#define device_init (dev->init) -#define device_open (dev->open) -#define device_close (dev->close) -#define device_read (dev->read) -#define device_write (dev->write) -#define device_control (dev->control) -#endif /* RT_USING_DEVICE_OPS */ - -/** - * @brief This function registers a device driver with a specified name. - * - * @param dev is the pointer of device driver structure. - * - * @param name is the device driver's name. - * - * @param flags is the capabilities flag of device. - * - * @return the error code, RT_EOK on initialization successfully. - */ -rt_err_t rt_device_register(rt_device_t dev, - const char *name, - rt_uint16_t flags) -{ - if (dev == RT_NULL) - return -RT_ERROR; - - if (rt_device_find(name) != RT_NULL) - return -RT_ERROR; - - rt_object_init(&(dev->parent), RT_Object_Class_Device, name); - dev->flag = flags; - dev->ref_count = 0; - dev->open_flag = 0; - -#ifdef RT_USING_POSIX_DEVIO - dev->fops = RT_NULL; - rt_wqueue_init(&(dev->wait_queue)); -#endif /* RT_USING_POSIX_DEVIO */ - - return RT_EOK; -} -RTM_EXPORT(rt_device_register); - -/** - * @brief This function removes a previously registered device driver. - * - * @param dev is the pointer of device driver structure. - * - * @return the error code, RT_EOK on successfully. - */ -rt_err_t rt_device_unregister(rt_device_t dev) -{ - /* parameter check */ - RT_ASSERT(dev != RT_NULL); - RT_ASSERT(rt_object_get_type(&dev->parent) == RT_Object_Class_Device); - RT_ASSERT(rt_object_is_systemobject(&dev->parent)); - - rt_object_detach(&(dev->parent)); - - return RT_EOK; -} -RTM_EXPORT(rt_device_unregister); - -/** - * @brief This function finds a device driver by specified name. - * - * @param name is the device driver's name. - * - * @return the registered device driver on successful, or RT_NULL on failure. - */ -rt_device_t rt_device_find(const char *name) -{ - return (rt_device_t)rt_object_find(name, RT_Object_Class_Device); -} -RTM_EXPORT(rt_device_find); - -#ifdef RT_USING_HEAP -/** - * @brief This function creates a device object with user data size. - * - * @param type is the type of the device object. - * - * @param attach_size is the size of user data. - * - * @return the allocated device object, or RT_NULL when failed. - */ -rt_device_t rt_device_create(int type, int attach_size) -{ - int size; - rt_device_t device; - - size = RT_ALIGN(sizeof(struct rt_device), RT_ALIGN_SIZE); - attach_size = RT_ALIGN(attach_size, RT_ALIGN_SIZE); - /* use the total size */ - size += attach_size; - - device = (rt_device_t)rt_malloc(size); - if (device) - { - rt_memset(device, 0x0, sizeof(struct rt_device)); - device->type = (enum rt_device_class_type)type; - } - - return device; -} -RTM_EXPORT(rt_device_create); - -/** - * @brief This function destroy the specific device object. - * - * @param dev is a specific device object. - */ -void rt_device_destroy(rt_device_t dev) -{ - /* parameter check */ - RT_ASSERT(dev != RT_NULL); - RT_ASSERT(rt_object_get_type(&dev->parent) == RT_Object_Class_Device); - RT_ASSERT(rt_object_is_systemobject(&dev->parent) == RT_FALSE); - - rt_object_detach(&(dev->parent)); - - /* release this device object */ - rt_free(dev); -} -RTM_EXPORT(rt_device_destroy); -#endif /* RT_USING_HEAP */ - -/** - * @brief This function will initialize the specified device. - * - * @param dev is the pointer of device driver structure. - * - * @return the result, RT_EOK on successfully. - */ -rt_err_t rt_device_init(rt_device_t dev) -{ - rt_err_t result = RT_EOK; - - RT_ASSERT(dev != RT_NULL); - - /* get device_init handler */ - if (device_init != RT_NULL) - { - if (!(dev->flag & RT_DEVICE_FLAG_ACTIVATED)) - { - result = device_init(dev); - if (result != RT_EOK) - { - RT_DEBUG_LOG(RT_DEBUG_DEVICE, ("To initialize device:%s failed. The error code is %d\n", - dev->parent.name, result)); - } - else - { - dev->flag |= RT_DEVICE_FLAG_ACTIVATED; - } - } - } - - return result; -} - -/** - * @brief This function will open a device. - * - * @param dev is the pointer of device driver structure. - * - * @param oflag is the flags for device open. - * - * @return the result, RT_EOK on successfully. - */ -rt_err_t rt_device_open(rt_device_t dev, rt_uint16_t oflag) -{ - rt_err_t result = RT_EOK; - - /* parameter check */ - RT_ASSERT(dev != RT_NULL); - RT_ASSERT(rt_object_get_type(&dev->parent) == RT_Object_Class_Device); - - /* if device is not initialized, initialize it. */ - if (!(dev->flag & RT_DEVICE_FLAG_ACTIVATED)) - { - if (device_init != RT_NULL) - { - result = device_init(dev); - if (result != RT_EOK) - { - RT_DEBUG_LOG(RT_DEBUG_DEVICE, ("To initialize device:%s failed. The error code is %d\n", - dev->parent.name, result)); - - return result; - } - } - - dev->flag |= RT_DEVICE_FLAG_ACTIVATED; - } - - /* device is a stand alone device and opened */ - if ((dev->flag & RT_DEVICE_FLAG_STANDALONE) && - (dev->open_flag & RT_DEVICE_OFLAG_OPEN)) - { - return -RT_EBUSY; - } - - /* device is not opened or opened by other oflag, call device_open interface */ - if (!(dev->open_flag & RT_DEVICE_OFLAG_OPEN) || - ((dev->open_flag & RT_DEVICE_OFLAG_MASK) != (oflag & RT_DEVICE_OFLAG_MASK))) - { - if (device_open != RT_NULL) - { - result = device_open(dev, oflag); - } - else - { - /* set open flag */ - dev->open_flag = (oflag & RT_DEVICE_OFLAG_MASK); - } - } - - /* set open flag */ - if (result == RT_EOK || result == -RT_ENOSYS) - { - dev->open_flag |= RT_DEVICE_OFLAG_OPEN; - - dev->ref_count++; - /* don't let bad things happen silently. If you are bitten by this assert, - * please set the ref_count to a bigger type. */ - RT_ASSERT(dev->ref_count != 0); - } - - return result; -} -RTM_EXPORT(rt_device_open); - -/** - * @brief This function will close a device. - * - * @param dev is the pointer of device driver structure. - * - * @return the result, RT_EOK on successfully. - */ -rt_err_t rt_device_close(rt_device_t dev) -{ - rt_err_t result = RT_EOK; - - /* parameter check */ - RT_ASSERT(dev != RT_NULL); - RT_ASSERT(rt_object_get_type(&dev->parent) == RT_Object_Class_Device); - - if (dev->ref_count == 0) - return -RT_ERROR; - - dev->ref_count--; - - if (dev->ref_count != 0) - return RT_EOK; - - /* call device_close interface */ - if (device_close != RT_NULL) - { - result = device_close(dev); - } - - /* set open flag */ - if (result == RT_EOK || result == -RT_ENOSYS) - dev->open_flag = RT_DEVICE_OFLAG_CLOSE; - - return result; -} -RTM_EXPORT(rt_device_close); - -/** - * @brief This function will read some data from a device. - * - * @param dev is the pointer of device driver structure. - * - * @param pos is the position when reading. - * - * @param buffer is a data buffer to save the read data. - * - * @param size is the size of buffer. - * - * @return the actually read size on successful, otherwise 0 will be returned. - * - * @note the unit of size/pos is a block for block device. - */ -rt_ssize_t rt_device_read(rt_device_t dev, - rt_off_t pos, - void *buffer, - rt_size_t size) -{ - /* parameter check */ - RT_ASSERT(dev != RT_NULL); - RT_ASSERT(rt_object_get_type(&dev->parent) == RT_Object_Class_Device); - - if (dev->ref_count == 0) - { - rt_set_errno(-RT_ERROR); - return 0; - } - - /* call device_read interface */ - if (device_read != RT_NULL) - { - return device_read(dev, pos, buffer, size); - } - - /* set error code */ - rt_set_errno(-RT_ENOSYS); - - return 0; -} -RTM_EXPORT(rt_device_read); - -/** - * @brief This function will write some data to a device. - * - * @param dev is the pointer of device driver structure. - * - * @param pos is the position when writing. - * - * @param buffer is the data buffer to be written to device. - * - * @param size is the size of buffer. - * - * @return the actually written size on successful, otherwise 0 will be returned. - * - * @note the unit of size/pos is a block for block device. - */ -rt_ssize_t rt_device_write(rt_device_t dev, - rt_off_t pos, - const void *buffer, - rt_size_t size) -{ - /* parameter check */ - RT_ASSERT(dev != RT_NULL); - RT_ASSERT(rt_object_get_type(&dev->parent) == RT_Object_Class_Device); - - if (dev->ref_count == 0) - { - rt_set_errno(-RT_ERROR); - return 0; - } - - /* call device_write interface */ - if (device_write != RT_NULL) - { - return device_write(dev, pos, buffer, size); - } - - /* set error code */ - rt_set_errno(-RT_ENOSYS); - - return 0; -} -RTM_EXPORT(rt_device_write); - -/** - * @brief This function will perform a variety of control functions on devices. - * - * @param dev is the pointer of device driver structure. - * - * @param cmd is the command sent to device. - * - * @param arg is the argument of command. - * - * @return the result, -RT_ENOSYS for failed. - */ -rt_err_t rt_device_control(rt_device_t dev, int cmd, void *arg) -{ - /* parameter check */ - RT_ASSERT(dev != RT_NULL); - RT_ASSERT(rt_object_get_type(&dev->parent) == RT_Object_Class_Device); - - /* call device_write interface */ - if (device_control != RT_NULL) - { - return device_control(dev, cmd, arg); - } - - return -RT_ENOSYS; -} -RTM_EXPORT(rt_device_control); - -/** - * @brief This function will set the reception indication callback function. This callback function - * is invoked when this device receives data. - * - * @param dev is the pointer of device driver structure. - * - * @param rx_ind is the indication callback function. - * - * @return RT_EOK - */ -rt_err_t rt_device_set_rx_indicate(rt_device_t dev, - rt_err_t (*rx_ind)(rt_device_t dev, - rt_size_t size)) -{ - /* parameter check */ - RT_ASSERT(dev != RT_NULL); - RT_ASSERT(rt_object_get_type(&dev->parent) == RT_Object_Class_Device); - - dev->rx_indicate = rx_ind; - - return RT_EOK; -} -RTM_EXPORT(rt_device_set_rx_indicate); - -/** - * @brief This function will set a callback function. The callback function - * will be called when device has written data to physical hardware. - * - * @param dev is the pointer of device driver structure. - * - * @param tx_done is the indication callback function. - * - * @return RT_EOK - */ -rt_err_t rt_device_set_tx_complete(rt_device_t dev, - rt_err_t (*tx_done)(rt_device_t dev, - void *buffer)) -{ - /* parameter check */ - RT_ASSERT(dev != RT_NULL); - RT_ASSERT(rt_object_get_type(&dev->parent) == RT_Object_Class_Device); - - dev->tx_complete = tx_done; - - return RT_EOK; -} -RTM_EXPORT(rt_device_set_tx_complete); - -#ifdef RT_USING_DM -/** - * This function bind drvier and device - * - * @param device the pointer of device structure - * @param driver the pointer of driver structure - * @param node the pointer of fdt node structure - * - * @return the error code, RT_EOK on successfully. - */ -rt_err_t rt_device_bind_driver(rt_device_t device, rt_driver_t driver, void *node) -{ - if((!driver) || (!device)) - { - return -RT_EINVAL; - } - - device->drv = driver; -#ifdef RT_USING_DEVICE_OPS - device->ops = driver->dev_ops; -#endif - device->dtb_node = node; - - return RT_EOK; -} -RTM_EXPORT(rt_device_bind_driver); - -/** - * This function create rt_device according to driver infomation - * - * @param drv the pointer of driver structure - * @param device_id specify the ID of the rt_device - * - * @return the error code, RT_EOK on successfully. - */ -rt_device_t rt_device_create_since_driver(rt_driver_t drv,int device_id) -{ - rt_device_t device; - if (!drv) - { - return RT_NULL; - } - - device = (rt_device_t)rt_calloc(1,drv->device_size); - if(device == RT_NULL) - { - return RT_NULL; - } - device->device_id = device_id; - rt_snprintf(device->parent.name, sizeof(device->parent.name), "%s%d", drv->name, device_id); - return device; -} -RTM_EXPORT(rt_device_create_since_driver); - -/** - * This function rt_device probe and init - * - * @param device the pointer of rt_device structure - * @return the error code, RT_EOK on successfully. - */ -rt_err_t rt_device_probe_and_init(rt_device_t device) -{ - int ret = -RT_ERROR; - if (!device) - { - return -RT_EINVAL; - } - if(!device->drv) - { - return -RT_ERROR; - } - if(device->drv->probe) - { - ret = device->drv->probe((rt_device_t)device); - } - if(device->drv->probe_init) - { - ret = device->drv->probe_init((rt_device_t)device); - } - return ret; -} -RTM_EXPORT(rt_device_probe_and_init); -#endif /* RT_USING_DM */ -#endif /* RT_USING_DEVICE */ |