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rt-thread/components/drivers/usb/usbdevice/class/cdc_vcom.c

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/*
* File : cdc_vcom.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2012, RT-Thread Development Team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Change Logs:
* Date Author Notes
* 2012-10-02 Yi Qiu first version
* 2012-12-12 heyuanjie87 change endpoints and function handler
* 2013-06-25 heyuanjie87 remove SOF mechinism
* 2013-07-20 Yi Qiu do more test
*/
#include <rtthread.h>
#include <rtservice.h>
#include <rtdevice.h>
#include <rthw.h>
#include "cdc.h"
#ifdef RT_USB_DEVICE_CDC
#define TX_TIMEOUT 100
#define CDC_RX_BUFSIZE 2048
#define CDC_MAX_PACKET_SIZE 64
#define VCOM_DEVICE "vcom"
ALIGN(RT_ALIGN_SIZE)
static rt_uint8_t vcom_thread_stack[512];
static struct rt_thread vcom_thread;
#define VCOM_MQ_MSG_SZ 16
#define VCOM_MQ_MAX_MSG 4
/* internal of the message queue: every message is associated with a pointer,
* so in order to recveive VCOM_MQ_MAX_MSG messages, we have to allocate more
* than VCOM_MQ_MSG_SZ*VCOM_MQ_MAX_MSG memery. */
static rt_uint8_t vcom_tx_thread_mq_pool[(VCOM_MQ_MSG_SZ+sizeof(void*))*VCOM_MQ_MAX_MSG];
static struct rt_messagequeue vcom_tx_thread_mq;
static struct ucdc_line_coding line_coding;
struct vcom
{
struct rt_serial_device serial;
uep_t ep_out;
uep_t ep_in;
uep_t ep_cmd;
rt_bool_t connected;
rt_bool_t in_sending;
struct rt_completion wait;
rt_uint8_t rx_rbp[CDC_RX_BUFSIZE];
struct rt_ringbuffer rx_ringbuffer;
struct serial_ringbuffer vcom_int_rx;
};
struct vcom_tx_msg
{
struct rt_serial_device * serial;
const char *buf;
rt_size_t size;
};
static struct udevice_descriptor dev_desc =
{
USB_DESC_LENGTH_DEVICE, //bLength;
USB_DESC_TYPE_DEVICE, //type;
USB_BCD_VERSION, //bcdUSB;
USB_CLASS_CDC, //bDeviceClass;
0x00, //bDeviceSubClass;
0x00, //bDeviceProtocol;
CDC_MAX_PACKET_SIZE, //bMaxPacketSize0;
_VENDOR_ID, //idVendor;
_PRODUCT_ID, //idProduct;
USB_BCD_DEVICE, //bcdDevice;
USB_STRING_MANU_INDEX, //iManufacturer;
USB_STRING_PRODUCT_INDEX, //iProduct;
USB_STRING_SERIAL_INDEX, //iSerialNumber;
USB_DYNAMIC, //bNumConfigurations;
};
static struct usb_qualifier_descriptor dev_qualifier =
{
sizeof(dev_qualifier),
USB_DESC_TYPE_DEVICEQUALIFIER,
0x0200,
USB_CLASS_CDC,
0x00,
64,
0x01,
0,
};
/* communcation interface descriptor */
const static struct ucdc_comm_descriptor _comm_desc =
{
#ifdef RT_USB_DEVICE_COMPOSITE
/* Interface Association Descriptor */
USB_DESC_LENGTH_IAD,
USB_DESC_TYPE_IAD,
USB_DYNAMIC,
0x02,
USB_CDC_CLASS_COMM,
USB_CDC_SUBCLASS_ACM,
USB_CDC_PROTOCOL_V25TER,
0x00,
#endif
/* Interface Descriptor */
USB_DESC_LENGTH_INTERFACE,
USB_DESC_TYPE_INTERFACE,
USB_DYNAMIC,
0x00,
0x01,
USB_CDC_CLASS_COMM,
USB_CDC_SUBCLASS_ACM,
USB_CDC_PROTOCOL_V25TER,
0x00,
/* Header Functional Descriptor */
0x05,
USB_CDC_CS_INTERFACE,
USB_CDC_SCS_HEADER,
0x0110,
/* Call Management Functional Descriptor */
0x05,
USB_CDC_CS_INTERFACE,
USB_CDC_SCS_CALL_MGMT,
0x00,
USB_DYNAMIC,
/* Abstract Control Management Functional Descriptor */
0x04,
USB_CDC_CS_INTERFACE,
USB_CDC_SCS_ACM,
0x02,
/* Union Functional Descriptor */
0x05,
USB_CDC_CS_INTERFACE,
USB_CDC_SCS_UNION,
USB_DYNAMIC,
USB_DYNAMIC,
/* Endpoint Descriptor */
USB_DESC_LENGTH_ENDPOINT,
USB_DESC_TYPE_ENDPOINT,
USB_DYNAMIC | USB_DIR_IN,
USB_EP_ATTR_INT,
0x08,
0xFF,
};
/* data interface descriptor */
const static struct ucdc_data_descriptor _data_desc =
{
/* interface descriptor */
USB_DESC_LENGTH_INTERFACE,
USB_DESC_TYPE_INTERFACE,
USB_DYNAMIC,
0x00,
0x02,
USB_CDC_CLASS_DATA,
0x00,
0x00,
0x00,
/* endpoint, bulk out */
USB_DESC_LENGTH_ENDPOINT,
USB_DESC_TYPE_ENDPOINT,
USB_DYNAMIC | USB_DIR_OUT,
USB_EP_ATTR_BULK,
USB_CDC_BUFSIZE,
0x00,
/* endpoint, bulk in */
USB_DESC_LENGTH_ENDPOINT,
USB_DESC_TYPE_ENDPOINT,
USB_DYNAMIC | USB_DIR_IN,
USB_EP_ATTR_BULK,
USB_CDC_BUFSIZE,
0x00,
};
const static char* _ustring[] =
{
"Language",
"RT-Thread Team.",
"RTT Virtual Serial",
"32021919830108",
"Configuration",
"Interface",
};
static void rt_usb_vcom_init(struct ufunction *func);
static void _vcom_reset_state(ufunction_t func)
{
struct vcom* data;
int lvl;
RT_ASSERT(func != RT_NULL)
data = (struct vcom*)func->user_data;
lvl = rt_hw_interrupt_disable();
data->connected = RT_FALSE;
data->in_sending = RT_FALSE;
/*rt_kprintf("reset USB serial\n", cnt);*/
rt_hw_interrupt_enable(lvl);
}
/**
* This function will handle cdc bulk in endpoint request.
*
* @param func the usb function object.
* @param size request size.
*
* @return RT_EOK.
*/
static rt_err_t _ep_in_handler(ufunction_t func, rt_size_t size)
{
struct vcom *data;
RT_ASSERT(func != RT_NULL);
RT_DEBUG_LOG(RT_DEBUG_USB, ("_ep_in_handler %d\n", size));
data = (struct vcom*)func->user_data;
if ((size != 0) && (size % CDC_MAX_PACKET_SIZE == 0))
{
/* don't have data right now. Send a zero-length-packet to
* terminate the transaction.
*
* FIXME: actually, this might not be the right place to send zlp.
* Only the rt_device_write could know how much data is sending. */
data->in_sending = RT_TRUE;
data->ep_in->request.buffer = RT_NULL;
data->ep_in->request.size = 0;
data->ep_in->request.req_type = UIO_REQUEST_WRITE;
rt_usbd_io_request(func->device, data->ep_in, &data->ep_in->request);
return RT_EOK;
}
rt_completion_done(&data->wait);
return RT_EOK;
}
/**
* This function will handle cdc bulk out endpoint request.
*
* @param func the usb function object.
* @param size request size.
*
* @return RT_EOK.
*/
static rt_err_t _ep_out_handler(ufunction_t func, rt_size_t size)
{
rt_uint32_t level;
struct vcom *data;
RT_ASSERT(func != RT_NULL);
RT_DEBUG_LOG(RT_DEBUG_USB, ("_ep_out_handler %d\n", size));
data = (struct vcom*)func->user_data;
/* receive data from USB VCOM */
level = rt_hw_interrupt_disable();
rt_ringbuffer_put(&data->rx_ringbuffer, data->ep_out->buffer, size);
rt_hw_interrupt_enable(level);
/* notify receive data */
rt_hw_serial_isr(&data->serial);
data->ep_out->request.buffer = data->ep_out->buffer;
data->ep_out->request.size = EP_MAXPACKET(data->ep_out);
data->ep_out->request.req_type = UIO_REQUEST_READ_MOST;
rt_usbd_io_request(func->device, data->ep_out, &data->ep_out->request);
return RT_EOK;
}
/**
* This function will handle cdc interrupt in endpoint request.
*
* @param device the usb device object.
* @param size request size.
*
* @return RT_EOK.
*/
static rt_err_t _ep_cmd_handler(ufunction_t func, rt_size_t size)
{
RT_ASSERT(func != RT_NULL);
RT_DEBUG_LOG(RT_DEBUG_USB, ("_ep_cmd_handler\n"));
return RT_EOK;
}
/**
* This function will handle cdc_get_line_coding request.
*
* @param device the usb device object.
* @param setup the setup request.
*
* @return RT_EOK on successful.
*/
static rt_err_t _cdc_get_line_coding(udevice_t device, ureq_t setup)
{
struct ucdc_line_coding data;
rt_uint16_t size;
RT_ASSERT(device != RT_NULL);
RT_ASSERT(setup != RT_NULL);
RT_DEBUG_LOG(RT_DEBUG_USB, ("_cdc_get_line_coding\n"));
data.dwDTERate = 115200;
data.bCharFormat = 0;
data.bDataBits = 8;
data.bParityType = 0;
size = setup->length > 7 ? 7 : setup->length;
rt_usbd_ep0_write(device, (void*)&data, size);
return RT_EOK;
}
static rt_err_t _cdc_set_line_coding_callback(udevice_t device, rt_size_t size)
{
RT_DEBUG_LOG(RT_DEBUG_USB, ("_cdc_set_line_coding_callback\n"));
dcd_ep0_send_status(device->dcd);
return RT_EOK;
}
/**
* This function will handle cdc_set_line_coding request.
*
* @param device the usb device object.
* @param setup the setup request.
*
* @return RT_EOK on successful.
*/
static rt_err_t _cdc_set_line_coding(udevice_t device, ureq_t setup)
{
RT_ASSERT(device != RT_NULL);
RT_ASSERT(setup != RT_NULL);
RT_DEBUG_LOG(RT_DEBUG_USB, ("_cdc_set_line_coding\n"));
rt_usbd_ep0_read(device, (void*)&line_coding, sizeof(struct ucdc_line_coding),
_cdc_set_line_coding_callback);
return RT_EOK;
}
/**
* This function will handle cdc interface request.
*
* @param device the usb device object.
* @param setup the setup request.
*
* @return RT_EOK on successful.
*/
static rt_err_t _interface_handler(ufunction_t func, ureq_t setup)
{
struct vcom *data;
RT_ASSERT(func != RT_NULL);
RT_ASSERT(func->device != RT_NULL);
RT_ASSERT(setup != RT_NULL);
data = (struct vcom*)func->user_data;
switch(setup->request)
{
case CDC_SEND_ENCAPSULATED_COMMAND:
break;
case CDC_GET_ENCAPSULATED_RESPONSE:
break;
case CDC_SET_COMM_FEATURE:
break;
case CDC_GET_COMM_FEATURE:
break;
case CDC_CLEAR_COMM_FEATURE:
break;
case CDC_SET_LINE_CODING:
_cdc_set_line_coding(func->device, setup);
data->connected = RT_TRUE;
break;
case CDC_GET_LINE_CODING:
_cdc_get_line_coding(func->device, setup);
break;
case CDC_SET_CONTROL_LINE_STATE:
dcd_ep0_send_status(func->device->dcd);
break;
case CDC_SEND_BREAK:
break;
default:
rt_kprintf("unknown cdc request\n",setup->request_type);
return -RT_ERROR;
}
return RT_EOK;
}
/**
* This function will run cdc function, it will be called on handle set configuration request.
*
* @param func the usb function object.
*
* @return RT_EOK on successful.
*/
static rt_err_t _function_enable(ufunction_t func)
{
struct vcom *data;
RT_ASSERT(func != RT_NULL);
RT_DEBUG_LOG(RT_DEBUG_USB, ("cdc function enable\n"));
_vcom_reset_state(func);
data = (struct vcom*)func->user_data;
data->ep_out->buffer = rt_malloc(CDC_RX_BUFSIZE);
data->ep_out->request.buffer = data->ep_out->buffer;
data->ep_out->request.size = EP_MAXPACKET(data->ep_out);
data->ep_out->request.req_type = UIO_REQUEST_READ_MOST;
rt_usbd_io_request(func->device, data->ep_out, &data->ep_out->request);
return RT_EOK;
}
/**
* This function will stop cdc function, it will be called on handle set configuration request.
*
* @param func the usb function object.
*
* @return RT_EOK on successful.
*/
static rt_err_t _function_disable(ufunction_t func)
{
struct vcom *data;
RT_ASSERT(func != RT_NULL);
RT_DEBUG_LOG(RT_DEBUG_USB, ("cdc function disable\n"));
_vcom_reset_state(func);
data = (struct vcom*)func->user_data;
if(data->ep_out->buffer != RT_NULL)
{
rt_free(data->ep_out->buffer);
data->ep_out->buffer = RT_NULL;
}
return RT_EOK;
}
static struct ufunction_ops ops =
{
_function_enable,
_function_disable,
RT_NULL,
};
/**
* This function will configure cdc descriptor.
*
* @param comm the communication interface number.
* @param data the data interface number.
*
* @return RT_EOK on successful.
*/
static rt_err_t _cdc_descriptor_config(ucdc_comm_desc_t comm,
rt_uint8_t cintf_nr, ucdc_data_desc_t data, rt_uint8_t dintf_nr)
{
comm->call_mgmt_desc.data_interface = dintf_nr;
comm->union_desc.master_interface = cintf_nr;
comm->union_desc.slave_interface0 = dintf_nr;
#ifdef RT_USB_DEVICE_COMPOSITE
comm->iad_desc.bFirstInterface = cintf_nr;
#endif
return RT_EOK;
}
/**
* This function will create a cdc function instance.
*
* @param device the usb device object.
*
* @return RT_EOK on successful.
*/
ufunction_t rt_usbd_function_cdc_create(udevice_t device)
{
ufunction_t func;
struct vcom* data;
uintf_t intf_comm, intf_data;
ualtsetting_t comm_setting, data_setting;
ucdc_data_desc_t data_desc;
ucdc_comm_desc_t comm_desc;
/* parameter check */
RT_ASSERT(device != RT_NULL);
/* set usb device string description */
rt_usbd_device_set_string(device, _ustring);
/* create a cdc function */
func = rt_usbd_function_new(device, &dev_desc, &ops);
rt_usbd_device_set_qualifier(device, &dev_qualifier);
/* allocate memory for cdc vcom data */
data = (struct vcom*)rt_malloc(sizeof(struct vcom));
rt_memset(data, 0, sizeof(struct vcom));
func->user_data = (void*)data;
/* initilize vcom */
rt_usb_vcom_init(func);
/* create a cdc communication interface and a cdc data interface */
intf_comm = rt_usbd_interface_new(device, _interface_handler);
intf_data = rt_usbd_interface_new(device, _interface_handler);
/* create a communication alternate setting and a data alternate setting */
comm_setting = rt_usbd_altsetting_new(sizeof(struct ucdc_comm_descriptor));
data_setting = rt_usbd_altsetting_new(sizeof(struct ucdc_data_descriptor));
/* config desc in alternate setting */
rt_usbd_altsetting_config_descriptor(comm_setting, &_comm_desc,
(rt_off_t)&((ucdc_comm_desc_t)0)->intf_desc);
rt_usbd_altsetting_config_descriptor(data_setting, &_data_desc, 0);
/* configure the cdc interface descriptor */
_cdc_descriptor_config(comm_setting->desc, intf_comm->intf_num, data_setting->desc, intf_data->intf_num);
/* create a command endpoint */
comm_desc = (ucdc_comm_desc_t)comm_setting->desc;
data->ep_cmd = rt_usbd_endpoint_new(&comm_desc->ep_desc, _ep_cmd_handler);
/* add the command endpoint to the cdc communication interface */
rt_usbd_altsetting_add_endpoint(comm_setting, data->ep_cmd);
/* add the communication alternate setting to the communication interface,
then set default setting of the interface */
rt_usbd_interface_add_altsetting(intf_comm, comm_setting);
rt_usbd_set_altsetting(intf_comm, 0);
/* add the communication interface to the cdc function */
rt_usbd_function_add_interface(func, intf_comm);
/* create a bulk in and a bulk endpoint */
data_desc = (ucdc_data_desc_t)data_setting->desc;
data->ep_out = rt_usbd_endpoint_new(&data_desc->ep_out_desc, _ep_out_handler);
data->ep_in = rt_usbd_endpoint_new(&data_desc->ep_in_desc, _ep_in_handler);
/* add the bulk out and bulk in endpoints to the data alternate setting */
rt_usbd_altsetting_add_endpoint(data_setting, data->ep_in);
rt_usbd_altsetting_add_endpoint(data_setting, data->ep_out);
/* add the data alternate setting to the data interface
then set default setting of the interface */
rt_usbd_interface_add_altsetting(intf_data, data_setting);
rt_usbd_set_altsetting(intf_data, 0);
/* add the cdc data interface to cdc function */
rt_usbd_function_add_interface(func, intf_data);
return func;
}
/**
* UART device in RT-Thread
*/
static rt_err_t _vcom_configure(struct rt_serial_device *serial,
struct serial_configure *cfg)
{
return RT_EOK;
}
static rt_err_t _vcom_control(struct rt_serial_device *serial,
int cmd, void *arg)
{
switch (cmd)
{
case RT_DEVICE_CTRL_CLR_INT:
/* disable rx irq */
break;
case RT_DEVICE_CTRL_SET_INT:
/* enable rx irq */
break;
}
return RT_EOK;
}
static int _vcom_getc(struct rt_serial_device *serial)
{
int result;
rt_uint8_t ch;
rt_uint32_t level;
struct ufunction *func;
struct vcom *data;
func = (struct ufunction*)serial->parent.user_data;
data = (struct vcom*)func->user_data;
result = -1;
level = rt_hw_interrupt_disable();
if(rt_ringbuffer_getchar(&data->rx_ringbuffer, &ch) != 0)
{
result = ch;
}
rt_hw_interrupt_enable(level);
return result;
}
static rt_size_t _vcom_tx(struct rt_serial_device *serial,
const char *buf, rt_size_t size)
{
struct vcom_tx_msg msg;
RT_ASSERT(serial != RT_NULL);
RT_ASSERT(buf != RT_NULL);
msg.buf = buf;
msg.serial = serial;
msg.size = size;
if (rt_mq_send(&vcom_tx_thread_mq, (void*)&msg,
sizeof(struct vcom_tx_msg)) != RT_EOK)
{
rt_kprintf("vcom send msg fail\n");
return 0;
}
return size;
}
static const struct rt_uart_ops usb_vcom_ops =
{
_vcom_configure,
_vcom_control,
RT_NULL,
_vcom_getc,
RT_NULL,
//_vcom_tx,
};
/* Vcom Tx Thread */
static void vcom_tx_thread_entry(void* parameter)
{
struct vcom_tx_msg msg;
while (1)
{
if (rt_mq_recv(&vcom_tx_thread_mq, (void*)&msg,
sizeof(struct vcom_tx_msg), RT_WAITING_FOREVER) == RT_EOK)
{
struct ufunction *func;
struct vcom *data;
func = (struct ufunction*)msg.serial->parent.user_data;
data = (struct vcom*)func->user_data;
if (!data->connected)
{
continue;
}
rt_completion_init(&data->wait);
data->ep_in->request.buffer = (void*)msg.buf;
data->ep_in->request.size = msg.size;
data->ep_in->request.req_type = UIO_REQUEST_WRITE;
rt_usbd_io_request(func->device, data->ep_in, &data->ep_in->request);
if (rt_completion_wait(&data->wait, TX_TIMEOUT) != RT_EOK)
{
rt_kprintf("vcom tx timeout\n");
}
}
}
}
static void rt_usb_vcom_init(struct ufunction *func)
{
rt_err_t result = RT_EOK;
struct serial_configure config;
struct vcom *data = (struct vcom*)func->user_data;
/* initialize ring buffer */
rt_ringbuffer_init(&data->rx_ringbuffer, data->rx_rbp, CDC_RX_BUFSIZE);
config.baud_rate = BAUD_RATE_115200;
config.bit_order = BIT_ORDER_LSB;
config.data_bits = DATA_BITS_8;
config.parity = PARITY_NONE;
config.stop_bits = STOP_BITS_1;
config.invert = NRZ_NORMAL;
data->serial.ops = &usb_vcom_ops;
data->serial.int_rx = &data->vcom_int_rx;
data->serial.config = config;
/* register vcom device */
rt_hw_serial_register(&data->serial, VCOM_DEVICE,
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_INT_TX,
func);
/* create an vcom message queue */
rt_mq_init(&vcom_tx_thread_mq, "vcomq", vcom_tx_thread_mq_pool, VCOM_MQ_MSG_SZ,
sizeof(vcom_tx_thread_mq_pool), RT_IPC_FLAG_FIFO);
/* init usb device thread */
rt_thread_init(&vcom_thread, "vcom", vcom_tx_thread_entry, RT_NULL,
vcom_thread_stack, 512, 8, 20);
result = rt_thread_startup(&vcom_thread);
RT_ASSERT(result == RT_EOK);
}
#endif
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