1 /* 2 * Copyright (c) 2007-2008 by Michael Lotz 3 * Heavily based on the original usb_serial driver which is: 4 * 5 * Copyright (c) 2003 by Siarzhuk Zharski <imker@gmx.li> 6 * Distributed under the terms of the MIT License. 7 */ 8 #include "ACM.h" 9 #include "Driver.h" 10 11 12 ACMDevice::ACMDevice(usb_device device, uint16 vendorID, uint16 productID, 13 const char *description) 14 : SerialDevice(device, vendorID, productID, description) 15 { 16 } 17 18 19 status_t 20 ACMDevice::AddDevice(const usb_configuration_info *config) 21 { 22 TRACE_FUNCALLS("> ACMDevice::AddDevice(0x%08x, 0x%08x)\n", this, config); 23 24 status_t status = ENODEV; 25 uint8 masterIndex = 0; 26 uint8 slaveIndex = 0; 27 usb_cdc_cm_functional_descriptor* cmDesc = NULL; 28 usb_cdc_union_functional_descriptor* unionDesc = NULL; 29 usb_cdc_acm_functional_descriptor* acmDesc = NULL; 30 31 // Search ACM Communication Interface 32 for (size_t i = 0; i < config->interface_count && status < B_OK; i++) { 33 usb_interface_info *interface = config->interface[i].active; 34 usb_interface_descriptor *descriptor = interface->descr; 35 if (descriptor->interface_class != USB_CDC_COMMUNICATION_INTERFACE_CLASS 36 || descriptor->interface_subclass != USB_CDC_COMMUNICATION_INTERFACE_ACM_SUBCLASS) 37 continue; 38 39 // Found ACM Communication Interface! 40 // Get functional descriptors of some interest, if any 41 for (size_t j = 0; j < interface->generic_count; j++) { 42 usb_generic_descriptor *generic = &interface->generic[j]->generic; 43 switch (generic->data[0]) { 44 case USB_CDC_CM_FUNCTIONAL_DESCRIPTOR: 45 cmDesc = (usb_cdc_cm_functional_descriptor*)generic; 46 break; 47 48 case USB_CDC_ACM_FUNCTIONAL_DESCRIPTOR: 49 acmDesc = (usb_cdc_acm_functional_descriptor*)generic; 50 break; 51 52 case USB_CDC_UNION_FUNCTIONAL_DESCRIPTOR: 53 unionDesc = (usb_cdc_union_functional_descriptor*)generic; 54 break; 55 } 56 } 57 58 masterIndex = unionDesc ? unionDesc->master_interface : i; 59 slaveIndex = cmDesc ? cmDesc->data_interface 60 : unionDesc ? unionDesc->slave_interfaces[0] : 0; 61 62 TRACE("ACM device found on configuration #%d: master itf: %d, slave/data itf: %d\n", 63 config->descr->configuration, masterIndex, slaveIndex); 64 status = B_OK; 65 break; 66 } 67 68 69 if (status == B_OK && masterIndex < config->interface_count) { 70 // check that the indicated master interface fits our need 71 usb_interface_info *interface = config->interface[masterIndex].active; 72 usb_interface_descriptor *descriptor = interface->descr; 73 if ((descriptor->interface_class == USB_CDC_COMMUNICATION_INTERFACE_CLASS 74 || descriptor->interface_class == USB_CDC_DATA_INTERFACE_CLASS) 75 && interface->endpoint_count >= 1) { 76 SetControlPipe(interface->endpoint[0].handle); 77 } else 78 status = ENODEV; 79 } 80 81 if (status == B_OK && slaveIndex < config->interface_count) { 82 // check that the indicated slave interface fits our need 83 usb_interface_info *interface = config->interface[slaveIndex].active; 84 usb_interface_descriptor *descriptor = interface->descr; 85 if (descriptor->interface_class == USB_CDC_DATA_INTERFACE_CLASS 86 && interface->endpoint_count >= 2) { 87 if (!(interface->endpoint[0].descr->endpoint_address & USB_ENDPOINT_ADDR_DIR_IN)) 88 SetWritePipe(interface->endpoint[0].handle); 89 else 90 SetReadPipe(interface->endpoint[0].handle); 91 92 if (interface->endpoint[1].descr->endpoint_address & USB_ENDPOINT_ADDR_DIR_IN) 93 SetReadPipe(interface->endpoint[1].handle); 94 else 95 SetWritePipe(interface->endpoint[1].handle); 96 } else 97 status = ENODEV; 98 } 99 100 TRACE_FUNCRET("< ACMDevice::AddDevice() returns: 0x%08x\n", status); 101 return status; 102 } 103 104 105 status_t 106 ACMDevice::SetLineCoding(usb_cdc_line_coding *lineCoding) 107 { 108 TRACE_FUNCALLS("> ACMDevice::SetLineCoding(0x%08x, {%d, 0x%02x, 0x%02x, 0x%02x})\n", 109 this, lineCoding->speed, lineCoding->stopbits, lineCoding->parity, 110 lineCoding->databits); 111 112 size_t length = 0; 113 status_t status = gUSBModule->send_request(Device(), 114 USB_REQTYPE_CLASS | USB_REQTYPE_INTERFACE_OUT, 115 USB_CDC_SET_LINE_CODING, 0, 0, 116 sizeof(usb_cdc_line_coding), 117 lineCoding, &length); 118 119 TRACE_FUNCRET("< ACMDevice::SetLineCoding() returns: 0x%08x\n", status); 120 return status; 121 } 122 123 124 status_t 125 ACMDevice::SetControlLineState(uint16 state) 126 { 127 TRACE_FUNCALLS("> ACMDevice::SetControlLineState(0x%08x, 0x%04x)\n", this, state); 128 129 size_t length = 0; 130 status_t status = gUSBModule->send_request(Device(), 131 USB_REQTYPE_CLASS | USB_REQTYPE_INTERFACE_OUT, 132 USB_CDC_SET_CONTROL_LINE_STATE, state, 0, 0, NULL, &length); 133 134 TRACE_FUNCRET("< ACMDevice::SetControlLineState() returns: 0x%08x\n", status); 135 return status; 136 } 137