261 lines
7.7 KiB
C
261 lines
7.7 KiB
C
/*
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* The MIT License (MIT)
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*
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* Copyright (c) 2019 Ha Thach (tinyusb.org)
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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* This file is part of the TinyUSB stack.
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*/
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#include "tusb_option.h"
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#if (CFG_TUH_ENABLED && CFG_TUH_CDC)
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#include "host/usbh.h"
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#include "host/usbh_classdriver.h"
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#include "cdc_host.h"
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//--------------------------------------------------------------------+
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// MACRO CONSTANT TYPEDEF
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//--------------------------------------------------------------------+
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typedef struct {
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uint8_t itf_num;
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uint8_t itf_protocol;
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uint8_t ep_notif;
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uint8_t ep_in;
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uint8_t ep_out;
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cdc_acm_capability_t acm_capability;
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} cdch_data_t;
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//--------------------------------------------------------------------+
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// INTERNAL OBJECT & FUNCTION DECLARATION
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//--------------------------------------------------------------------+
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static cdch_data_t cdch_data[CFG_TUH_DEVICE_MAX];
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static inline cdch_data_t* get_itf(uint8_t dev_addr)
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{
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return &cdch_data[dev_addr-1];
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}
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bool tuh_cdc_mounted(uint8_t dev_addr)
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{
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cdch_data_t* cdc = get_itf(dev_addr);
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return cdc->ep_in && cdc->ep_out;
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}
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bool tuh_cdc_is_busy(uint8_t dev_addr, cdc_pipeid_t pipeid)
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{
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if ( !tuh_cdc_mounted(dev_addr) ) return false;
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cdch_data_t const * p_cdc = get_itf(dev_addr);
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switch (pipeid)
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{
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case CDC_PIPE_NOTIFICATION:
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return usbh_edpt_busy(dev_addr, p_cdc->ep_notif );
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case CDC_PIPE_DATA_IN:
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return usbh_edpt_busy(dev_addr, p_cdc->ep_in );
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case CDC_PIPE_DATA_OUT:
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return usbh_edpt_busy(dev_addr, p_cdc->ep_out );
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default:
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return false;
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}
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}
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//--------------------------------------------------------------------+
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// APPLICATION API (parameter validation needed)
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//--------------------------------------------------------------------+
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bool tuh_cdc_serial_is_mounted(uint8_t dev_addr)
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{
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// TODO consider all AT Command as serial candidate
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return tuh_cdc_mounted(dev_addr) &&
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(cdch_data[dev_addr-1].itf_protocol <= CDC_COMM_PROTOCOL_ATCOMMAND_CDMA);
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}
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bool tuh_cdc_send(uint8_t dev_addr, void const * p_data, uint32_t length, bool is_notify)
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{
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(void) is_notify;
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TU_VERIFY( tuh_cdc_mounted(dev_addr) );
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TU_VERIFY( p_data != NULL && length);
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uint8_t const ep_out = cdch_data[dev_addr-1].ep_out;
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if ( usbh_edpt_busy(dev_addr, ep_out) ) return false;
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return usbh_edpt_xfer(dev_addr, ep_out, (void*)(uintptr_t) p_data, (uint16_t) length);
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}
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bool tuh_cdc_receive(uint8_t dev_addr, void * p_buffer, uint32_t length, bool is_notify)
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{
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(void) is_notify;
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TU_VERIFY( tuh_cdc_mounted(dev_addr) );
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TU_VERIFY( p_buffer != NULL && length );
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uint8_t const ep_in = cdch_data[dev_addr-1].ep_in;
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if ( usbh_edpt_busy(dev_addr, ep_in) ) return false;
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return usbh_edpt_xfer(dev_addr, ep_in, p_buffer, (uint16_t) length);
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}
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bool tuh_cdc_set_control_line_state(uint8_t dev_addr, bool dtr, bool rts, tuh_xfer_cb_t complete_cb)
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{
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cdch_data_t const * p_cdc = get_itf(dev_addr);
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tusb_control_request_t const request =
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{
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.bmRequestType_bit =
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{
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.recipient = TUSB_REQ_RCPT_INTERFACE,
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.type = TUSB_REQ_TYPE_CLASS,
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.direction = TUSB_DIR_OUT
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},
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.bRequest = CDC_REQUEST_SET_CONTROL_LINE_STATE,
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.wValue = tu_htole16((uint16_t) ((dtr ? 1u : 0u) | (rts ? 2u : 0u))),
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.wIndex = tu_htole16(p_cdc->itf_num),
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.wLength = 0
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};
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tuh_xfer_t xfer =
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{
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.daddr = dev_addr,
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.ep_addr = 0,
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.setup = &request,
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.buffer = NULL,
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.complete_cb = complete_cb,
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.user_data = 0
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};
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return tuh_control_xfer(&xfer);
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}
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//--------------------------------------------------------------------+
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// USBH-CLASS DRIVER API
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//--------------------------------------------------------------------+
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void cdch_init(void)
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{
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tu_memclr(cdch_data, sizeof(cdch_data));
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}
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bool cdch_open(uint8_t rhport, uint8_t dev_addr, tusb_desc_interface_t const *itf_desc, uint16_t max_len)
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{
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(void) rhport;
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(void) max_len;
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// Only support ACM subclass
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// Protocol 0xFF can be RNDIS device for windows XP
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TU_VERIFY( TUSB_CLASS_CDC == itf_desc->bInterfaceClass &&
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CDC_COMM_SUBCLASS_ABSTRACT_CONTROL_MODEL == itf_desc->bInterfaceSubClass &&
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0xFF != itf_desc->bInterfaceProtocol);
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cdch_data_t * p_cdc = get_itf(dev_addr);
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p_cdc->itf_num = itf_desc->bInterfaceNumber;
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p_cdc->itf_protocol = itf_desc->bInterfaceProtocol;
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//------------- Communication Interface -------------//
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uint16_t drv_len = tu_desc_len(itf_desc);
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uint8_t const * p_desc = tu_desc_next(itf_desc);
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// Communication Functional Descriptors
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while( TUSB_DESC_CS_INTERFACE == tu_desc_type(p_desc) && drv_len <= max_len )
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{
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if ( CDC_FUNC_DESC_ABSTRACT_CONTROL_MANAGEMENT == cdc_functional_desc_typeof(p_desc) )
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{
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// save ACM bmCapabilities
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p_cdc->acm_capability = ((cdc_desc_func_acm_t const *) p_desc)->bmCapabilities;
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}
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drv_len += tu_desc_len(p_desc);
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p_desc = tu_desc_next(p_desc);
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}
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if ( TUSB_DESC_ENDPOINT == tu_desc_type(p_desc) )
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{
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// notification endpoint
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tusb_desc_endpoint_t const * desc_ep = (tusb_desc_endpoint_t const *) p_desc;
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TU_ASSERT( tuh_edpt_open(dev_addr, desc_ep) );
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p_cdc->ep_notif = desc_ep->bEndpointAddress;
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drv_len += tu_desc_len(p_desc);
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p_desc = tu_desc_next(p_desc);
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}
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//------------- Data Interface (if any) -------------//
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if ( (TUSB_DESC_INTERFACE == tu_desc_type(p_desc)) &&
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(TUSB_CLASS_CDC_DATA == ((tusb_desc_interface_t const *) p_desc)->bInterfaceClass) )
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{
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// next to endpoint descriptor
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drv_len += tu_desc_len(p_desc);
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p_desc = tu_desc_next(p_desc);
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// data endpoints expected to be in pairs
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for(uint32_t i=0; i<2; i++)
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{
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tusb_desc_endpoint_t const *desc_ep = (tusb_desc_endpoint_t const *) p_desc;
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TU_ASSERT(TUSB_DESC_ENDPOINT == desc_ep->bDescriptorType && TUSB_XFER_BULK == desc_ep->bmAttributes.xfer);
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TU_ASSERT(tuh_edpt_open(dev_addr, desc_ep));
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if ( tu_edpt_dir(desc_ep->bEndpointAddress) == TUSB_DIR_IN )
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{
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p_cdc->ep_in = desc_ep->bEndpointAddress;
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}else
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{
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p_cdc->ep_out = desc_ep->bEndpointAddress;
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}
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drv_len += tu_desc_len(p_desc);
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p_desc = tu_desc_next( p_desc );
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}
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}
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return true;
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}
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bool cdch_set_config(uint8_t dev_addr, uint8_t itf_num)
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{
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(void) dev_addr; (void) itf_num;
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return true;
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}
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bool cdch_xfer_cb(uint8_t dev_addr, uint8_t ep_addr, xfer_result_t event, uint32_t xferred_bytes)
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{
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(void) ep_addr;
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tuh_cdc_xfer_isr( dev_addr, event, 0, xferred_bytes );
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return true;
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}
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void cdch_close(uint8_t dev_addr)
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{
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TU_VERIFY(dev_addr <= CFG_TUH_DEVICE_MAX, );
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cdch_data_t * p_cdc = get_itf(dev_addr);
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tu_memclr(p_cdc, sizeof(cdch_data_t));
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}
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#endif
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