diff --git a/examples/host/cdc_msc_hid/src/tusb_config.h b/examples/host/cdc_msc_hid/src/tusb_config.h index cc3775a76..abb75f068 100644 --- a/examples/host/cdc_msc_hid/src/tusb_config.h +++ b/examples/host/cdc_msc_hid/src/tusb_config.h @@ -97,8 +97,8 @@ #define CFG_TUH_HUB 1 // number of supported hubs #define CFG_TUH_CDC 1 // CDC ACM -#define CFG_TUH_CDC_FTDI 1 // FTDI Serial -#define CFG_TUH_CDC_CP210X 1 // CP210x Serial +#define CFG_TUH_CDC_FTDI 1 // FTDI Serial. FTDI is not part of CDC class, only to re-use CDC driver API +#define CFG_TUH_CDC_CP210X 1 // CP210x Serial. CP210X is not part of CDC class, only to re-use CDC driver API #define CFG_TUH_HID (3*CFG_TUH_DEVICE_MAX) // typical keyboard + mouse device can have 3-4 HID interfaces #define CFG_TUH_MSC 1 #define CFG_TUH_VENDOR 0 diff --git a/src/class/cdc/cdc_host.c b/src/class/cdc/cdc_host.c index a19f66181..f47ac4f10 100644 --- a/src/class/cdc/cdc_host.c +++ b/src/class/cdc/cdc_host.c @@ -143,281 +143,35 @@ static bool open_ep_stream_pair(cdch_interface_t* p_cdc , tusb_desc_endpoint_t c static void set_config_complete(cdch_interface_t * p_cdc, uint8_t idx, uint8_t itf_num); static void cdch_internal_control_complete(tuh_xfer_t* xfer); -//--------------------------------------------------------------------+ -// FTDI -//--------------------------------------------------------------------+ +//------------- FTDI prototypes -------------// #if CFG_TUH_CDC_FTDI - static uint16_t const ftdi_pids[] = { TU_FTDI_PID_LIST }; enum { FTDI_PID_COUNT = sizeof(ftdi_pids) / sizeof(ftdi_pids[0]) }; -enum { - CONFIG_FTDI_RESET = 0, - CONFIG_FTDI_MODEM_CTRL, - CONFIG_FTDI_SET_BAUDRATE, - CONFIG_FTDI_SET_DATA, - CONFIG_FTDI_COMPLETE -}; - -static bool ftdi_open(uint8_t daddr, const tusb_desc_interface_t *itf_desc, uint16_t max_len) { - // FTDI Interface includes 1 vendor interface + 2 bulk endpoints - TU_VERIFY(itf_desc->bInterfaceSubClass == 0xff && itf_desc->bInterfaceProtocol == 0xff && itf_desc->bNumEndpoints == 2); - TU_VERIFY(sizeof(tusb_desc_interface_t) + 2*sizeof(tusb_desc_endpoint_t) <= max_len); - - cdch_interface_t * p_cdc = make_new_itf(daddr, itf_desc); - TU_VERIFY(p_cdc); - - TU_LOG_CDCH("FTDI opened\r\n"); - - p_cdc->serial_protocol = SERIAL_PROTOCOL_FTDI; - - // endpoint pair - tusb_desc_endpoint_t const * desc_ep = (tusb_desc_endpoint_t const *) tu_desc_next(itf_desc); - - // data endpoints expected to be in pairs - return open_ep_stream_pair(p_cdc, desc_ep); -} - -// set request without data -static bool ftdi_sio_set_request(cdch_interface_t* p_cdc, uint8_t command, uint16_t value, tuh_xfer_cb_t complete_cb, uintptr_t user_data) { - tusb_control_request_t const request = { - .bmRequestType_bit = { - .recipient = TUSB_REQ_RCPT_DEVICE, - .type = TUSB_REQ_TYPE_VENDOR, - .direction = TUSB_DIR_OUT - }, - .bRequest = command, - .wValue = tu_htole16(value), - .wIndex = 0, - .wLength = 0 - }; - - tuh_xfer_t xfer = { - .daddr = p_cdc->daddr, - .ep_addr = 0, - .setup = &request, - .buffer = NULL, - .complete_cb = complete_cb, - .user_data = user_data - }; - - return tuh_control_xfer(&xfer); -} - -static bool ftdi_sio_reset(cdch_interface_t* p_cdc, tuh_xfer_cb_t complete_cb, uintptr_t user_data) -{ - return ftdi_sio_set_request(p_cdc, FTDI_SIO_RESET, FTDI_SIO_RESET_SIO, complete_cb, user_data); -} - -static bool ftdi_sio_set_modem_ctrl(cdch_interface_t* p_cdc, uint16_t line_state, tuh_xfer_cb_t complete_cb, uintptr_t user_data) -{ - p_cdc->user_control_cb = complete_cb; - TU_ASSERT(ftdi_sio_set_request(p_cdc, FTDI_SIO_MODEM_CTRL, 0x0300 | line_state, cdch_internal_control_complete, user_data)); - return true; -} - -static bool ftdi_sio_set_baudrate(cdch_interface_t* p_cdc, uint32_t baudrate, tuh_xfer_cb_t complete_cb, uintptr_t user_data) -{ - // TODO baudrate to baud divisor - (void) baudrate; - uint16_t divisor = 0x4138; // FIXME hardcoded to 9600 baud - - p_cdc->user_control_cb = complete_cb; - TU_ASSERT(ftdi_sio_set_request(p_cdc, FTDI_SIO_SET_BAUD_RATE, divisor, cdch_internal_control_complete, user_data)); - return true; -} - -static void process_ftdi_config(tuh_xfer_t* xfer) { - uintptr_t const state = xfer->user_data; - uint8_t const itf_num = (uint8_t) tu_le16toh(xfer->setup->wIndex); - uint8_t const idx = tuh_cdc_itf_get_index(xfer->daddr, itf_num); - cdch_interface_t * p_cdc = get_itf(idx); - TU_ASSERT(p_cdc, ); - - switch(state) { - // Note may need to read FTDI eeprom - case CONFIG_FTDI_RESET: - TU_ASSERT(ftdi_sio_reset(p_cdc, process_ftdi_config, CONFIG_FTDI_MODEM_CTRL),); - break; - - case CONFIG_FTDI_MODEM_CTRL: - #if CFG_TUH_CDC_LINE_CONTROL_ON_ENUM - TU_ASSERT( - ftdi_sio_set_modem_ctrl(p_cdc, CFG_TUH_CDC_LINE_CONTROL_ON_ENUM, process_ftdi_config, CONFIG_FTDI_SET_BAUDRATE),); - break; - #else - TU_ATTR_FALLTHROUGH; - #endif - - case CONFIG_FTDI_SET_BAUDRATE: { - #ifdef CFG_TUH_CDC_LINE_CODING_ON_ENUM - cdc_line_coding_t line_coding = CFG_TUH_CDC_LINE_CODING_ON_ENUM; - TU_ASSERT(ftdi_sio_set_baudrate(p_cdc, line_coding.bit_rate, process_ftdi_config, CONFIG_FTDI_SET_DATA),); - break; - #else - TU_ATTR_FALLTHROUGH; - #endif - } - - case CONFIG_FTDI_SET_DATA: { - #if 0 // TODO set data format - #ifdef CFG_TUH_CDC_LINE_CODING_ON_ENUM - cdc_line_coding_t line_coding = CFG_TUH_CDC_LINE_CODING_ON_ENUM; - TU_ASSERT(ftdi_sio_set_data(p_cdc, process_ftdi_config, CONFIG_FTDI_COMPLETE),); - break; - #endif - #endif - - TU_ATTR_FALLTHROUGH; - } - - case CONFIG_FTDI_COMPLETE: - set_config_complete(p_cdc, idx, itf_num); - break; - - default: - break; - } -} +static bool ftdi_open(uint8_t daddr, const tusb_desc_interface_t *itf_desc, uint16_t max_len); +static void process_ftdi_config(tuh_xfer_t* xfer); +static bool ftdi_sio_set_modem_ctrl(cdch_interface_t* p_cdc, uint16_t line_state, tuh_xfer_cb_t complete_cb, uintptr_t user_data); +static bool ftdi_sio_set_baudrate(cdch_interface_t* p_cdc, uint32_t baudrate, tuh_xfer_cb_t complete_cb, uintptr_t user_data); #endif -//--------------------------------------------------------------------+ -// CP210x -//--------------------------------------------------------------------+ - +//------------- CP210X prototypes -------------// #if CFG_TUH_CDC_CP210X - static uint16_t const cp210x_pids[] = { TU_CP210X_PID_LIST }; enum { CP210X_PID_COUNT = sizeof(cp210x_pids) / sizeof(cp210x_pids[0]) }; -enum { - CONFIG_CP210X_IFC_ENABLE = 0, - CONFIG_CP210X_SET_BAUDRATE, - CONFIG_CP210X_SET_LINE_CTL, - CONFIG_CP210X_SET_DTR_RTS, - CONFIG_CP210X_COMPLETE -}; - -static bool cp210x_open(uint8_t daddr, tusb_desc_interface_t const *itf_desc, uint16_t max_len) { - // CP210x Interface includes 1 vendor interface + 2 bulk endpoints - TU_VERIFY(itf_desc->bInterfaceSubClass == 0 && itf_desc->bInterfaceProtocol == 0 && itf_desc->bNumEndpoints == 2); - TU_VERIFY(sizeof(tusb_desc_interface_t) + 2*sizeof(tusb_desc_endpoint_t) <= max_len); - - cdch_interface_t * p_cdc = make_new_itf(daddr, itf_desc); - TU_VERIFY(p_cdc); - - TU_LOG_CDCH("CP210x opened\r\n"); - p_cdc->serial_protocol = SERIAL_PROTOCOL_CP210X; - - // endpoint pair - tusb_desc_endpoint_t const * desc_ep = (tusb_desc_endpoint_t const *) tu_desc_next(itf_desc); - - // data endpoints expected to be in pairs - return open_ep_stream_pair(p_cdc, desc_ep); -} - -static bool cp210x_set_request(cdch_interface_t* p_cdc, uint8_t command, uint16_t value, uint8_t* buffer, uint16_t length, tuh_xfer_cb_t complete_cb, uintptr_t user_data) { - tusb_control_request_t const request = { - .bmRequestType_bit = { - .recipient = TUSB_REQ_RCPT_INTERFACE, - .type = TUSB_REQ_TYPE_VENDOR, - .direction = TUSB_DIR_OUT - }, - .bRequest = command, - .wValue = tu_htole16(value), - .wIndex = p_cdc->bInterfaceNumber, - .wLength = tu_htole16(length) - }; - - // use usbh enum buf since application variable does not live long enough - uint8_t* enum_buf = NULL; - - if (buffer && length > 0) { - enum_buf = usbh_get_enum_buf(); - tu_memcpy_s(enum_buf, CFG_TUH_ENUMERATION_BUFSIZE, buffer, length); - } - - tuh_xfer_t xfer = { - .daddr = p_cdc->daddr, - .ep_addr = 0, - .setup = &request, - .buffer = enum_buf, - .complete_cb = complete_cb, - .user_data = user_data - }; - - return tuh_control_xfer(&xfer); -} - -static bool cp210x_ifc_enable(cdch_interface_t* p_cdc, uint16_t enabled, tuh_xfer_cb_t complete_cb, uintptr_t user_data) { - return cp210x_set_request(p_cdc, CP210X_IFC_ENABLE, enabled, NULL, 0, complete_cb, user_data); -} - -static bool cp210x_set_baudrate(cdch_interface_t* p_cdc, uint32_t baudrate, tuh_xfer_cb_t complete_cb, uintptr_t user_data) { - baudrate = tu_htole32(baudrate); - return cp210x_set_request(p_cdc, CP210X_SET_BAUDRATE, 0, (uint8_t *) &baudrate, 4, complete_cb, user_data); -} - -static bool cp210x_set_modem_ctrl(cdch_interface_t* p_cdc, uint16_t line_state, tuh_xfer_cb_t complete_cb, uintptr_t user_data) -{ - p_cdc->user_control_cb = complete_cb; - return cp210x_set_request(p_cdc, CP210X_SET_MHS, 0x0300 | line_state, NULL, 0, cdch_internal_control_complete, user_data); -} - -static void process_cp210x_config(tuh_xfer_t* xfer) { - uintptr_t const state = xfer->user_data; - uint8_t const itf_num = (uint8_t) tu_le16toh(xfer->setup->wIndex); - uint8_t const idx = tuh_cdc_itf_get_index(xfer->daddr, itf_num); - cdch_interface_t *p_cdc = get_itf(idx); - TU_ASSERT(p_cdc,); - - switch (state) { - case CONFIG_CP210X_IFC_ENABLE: - TU_ASSERT(cp210x_ifc_enable(p_cdc, 1, process_cp210x_config, CONFIG_CP210X_SET_BAUDRATE),); - break; - - case CONFIG_CP210X_SET_BAUDRATE: { - #ifdef CFG_TUH_CDC_LINE_CODING_ON_ENUM - cdc_line_coding_t line_coding = CFG_TUH_CDC_LINE_CODING_ON_ENUM; - TU_ASSERT(cp210x_set_baudrate(p_cdc, line_coding.bit_rate, process_cp210x_config, CONFIG_CP210X_SET_LINE_CTL),); - break; - #else - TU_ATTR_FALLTHROUGH; - #endif - } - - case CONFIG_CP210X_SET_LINE_CTL: { - #if defined(CFG_TUH_CDC_LINE_CODING_ON_ENUM) && 0 // skip for now - cdc_line_coding_t line_coding = CFG_TUH_CDC_LINE_CODING_ON_ENUM; - break; - #else - TU_ATTR_FALLTHROUGH; - #endif - } - - case CONFIG_CP210X_SET_DTR_RTS: - #if CFG_TUH_CDC_LINE_CONTROL_ON_ENUM - TU_ASSERT(cp210x_set_modem_ctrl(p_cdc, CFG_TUH_CDC_LINE_CONTROL_ON_ENUM, process_cp210x_config, CONFIG_CP210X_COMPLETE),); - break; - #else - TU_ATTR_FALLTHROUGH; - #endif - - case CONFIG_CP210X_COMPLETE: - set_config_complete(p_cdc, idx, itf_num); - break; - - default: break; - } -} +static bool cp210x_open(uint8_t daddr, tusb_desc_interface_t const *itf_desc, uint16_t max_len); +static void process_cp210x_config(tuh_xfer_t* xfer); +static bool cp210x_set_modem_ctrl(cdch_interface_t* p_cdc, uint16_t line_state, tuh_xfer_cb_t complete_cb, uintptr_t user_data); +static bool cp210x_set_baudrate(cdch_interface_t* p_cdc, uint32_t baudrate, tuh_xfer_cb_t complete_cb, uintptr_t user_data); #endif + //--------------------------------------------------------------------+ // APPLICATION API //--------------------------------------------------------------------+ @@ -610,6 +364,7 @@ static void cdch_internal_control_complete(tuh_xfer_t* xfer) } static bool acm_set_control_line_state(cdch_interface_t* p_cdc, uint16_t line_state, tuh_xfer_cb_t complete_cb, uintptr_t user_data) { + TU_LOG_CDCH("CDC ACM Set Control Line State\r\n"); tusb_control_request_t const request = { .bmRequestType_bit = { .recipient = TUSB_REQ_RCPT_INTERFACE, @@ -641,18 +396,23 @@ bool tuh_cdc_set_control_line_state(uint8_t idx, uint16_t line_state, tuh_xfer_c { cdch_interface_t* p_cdc = get_itf(idx); TU_VERIFY(p_cdc && support_line_request(p_cdc)); - TU_LOG_CDCH("CDC Set Control Line State\r\n"); - if(p_cdc->serial_protocol == SERIAL_PROTOCOL_ACM ) { - return acm_set_control_line_state(p_cdc, line_state, complete_cb, user_data); - } - #if CFG_TUH_CDC_FTDI - else if (p_cdc->serial_protocol == SERIAL_PROTOCOL_FTDI) { - return ftdi_sio_set_modem_ctrl(p_cdc, line_state, complete_cb, user_data); - } - #endif - else { - return false; + switch(p_cdc->serial_protocol) { + case SERIAL_PROTOCOL_ACM: + return acm_set_control_line_state(p_cdc, line_state, complete_cb, user_data); + + #if CFG_TUH_CDC_FTDI + case SERIAL_PROTOCOL_FTDI: + return ftdi_sio_set_modem_ctrl(p_cdc, line_state, complete_cb, user_data); + #endif + + #if CFG_TUH_CDC_CP210X + case SERIAL_PROTOCOL_CP210X: + return ftdi_sio_set_modem_ctrl(p_cdc, line_state, complete_cb, user_data); + #endif + + default: + return false; } } @@ -693,17 +453,22 @@ bool tuh_cdc_set_line_coding(uint8_t idx, cdc_line_coding_t const* line_coding, TU_VERIFY(p_cdc && support_line_request(p_cdc)); TU_LOG_CDCH("CDC Set Line Conding\r\n"); - if (p_cdc->serial_protocol == SERIAL_PROTOCOL_ACM) { - return acm_set_line_coding(p_cdc, line_coding, complete_cb, user_data); - } - #if CFG_TUH_CDC_FTDI - else if (p_cdc->serial_protocol == SERIAL_PROTOCOL_FTDI) { - // FTDI need to set baud rate and data bits, parity, stop bits separately - return ftdi_sio_set_baudrate(p_cdc, line_coding->bit_rate, complete_cb, user_data); - } - #endif - else { - return false; + switch(p_cdc->serial_protocol) { + case SERIAL_PROTOCOL_ACM: + return acm_set_line_coding(p_cdc, line_coding, complete_cb, user_data); + + #if CFG_TUH_CDC_FTDI + case SERIAL_PROTOCOL_FTDI: + // FTDI need to set baud rate and data bits, parity, stop bits separately + return ftdi_sio_set_baudrate(p_cdc, line_coding->bit_rate, complete_cb, user_data); + #endif + + #if CFG_TUH_CDC_CP210X + case SERIAL_PROTOCOL_CP210X: + return cp210x_set_baudrate(p_cdc, line_coding->bit_rate, complete_cb, user_data); + #endif + + default: return false; } } @@ -949,7 +714,7 @@ static void process_acm_config(tuh_xfer_t* xfer) #if CFG_TUH_CDC_LINE_CONTROL_ON_ENUM if (p_cdc->acm_capability.support_line_request) { - TU_ASSERT(tuh_cdc_set_control_line_state(idx, CFG_TUH_CDC_LINE_CONTROL_ON_ENUM, process_acm_config, + TU_ASSERT(acm_set_control_line_state(p_cdc, CFG_TUH_CDC_LINE_CONTROL_ON_ENUM, process_acm_config, CONFIG_ACM_SET_LINE_CODING), ); break; } @@ -1015,4 +780,274 @@ bool cdch_set_config(uint8_t daddr, uint8_t itf_num) return true; } +//--------------------------------------------------------------------+ +// FTDI +//--------------------------------------------------------------------+ +#if CFG_TUH_CDC_FTDI + +enum { + CONFIG_FTDI_RESET = 0, + CONFIG_FTDI_MODEM_CTRL, + CONFIG_FTDI_SET_BAUDRATE, + CONFIG_FTDI_SET_DATA, + CONFIG_FTDI_COMPLETE +}; + +static bool ftdi_open(uint8_t daddr, const tusb_desc_interface_t *itf_desc, uint16_t max_len) { + // FTDI Interface includes 1 vendor interface + 2 bulk endpoints + TU_VERIFY(itf_desc->bInterfaceSubClass == 0xff && itf_desc->bInterfaceProtocol == 0xff && itf_desc->bNumEndpoints == 2); + TU_VERIFY(sizeof(tusb_desc_interface_t) + 2*sizeof(tusb_desc_endpoint_t) <= max_len); + + cdch_interface_t * p_cdc = make_new_itf(daddr, itf_desc); + TU_VERIFY(p_cdc); + + TU_LOG_CDCH("FTDI opened\r\n"); + + p_cdc->serial_protocol = SERIAL_PROTOCOL_FTDI; + + // endpoint pair + tusb_desc_endpoint_t const * desc_ep = (tusb_desc_endpoint_t const *) tu_desc_next(itf_desc); + + // data endpoints expected to be in pairs + return open_ep_stream_pair(p_cdc, desc_ep); +} + +// set request without data +static bool ftdi_sio_set_request(cdch_interface_t* p_cdc, uint8_t command, uint16_t value, tuh_xfer_cb_t complete_cb, uintptr_t user_data) { + tusb_control_request_t const request = { + .bmRequestType_bit = { + .recipient = TUSB_REQ_RCPT_DEVICE, + .type = TUSB_REQ_TYPE_VENDOR, + .direction = TUSB_DIR_OUT + }, + .bRequest = command, + .wValue = tu_htole16(value), + .wIndex = 0, + .wLength = 0 + }; + + tuh_xfer_t xfer = { + .daddr = p_cdc->daddr, + .ep_addr = 0, + .setup = &request, + .buffer = NULL, + .complete_cb = complete_cb, + .user_data = user_data + }; + + return tuh_control_xfer(&xfer); +} + +static bool ftdi_sio_reset(cdch_interface_t* p_cdc, tuh_xfer_cb_t complete_cb, uintptr_t user_data) +{ + return ftdi_sio_set_request(p_cdc, FTDI_SIO_RESET, FTDI_SIO_RESET_SIO, complete_cb, user_data); +} + +static bool ftdi_sio_set_modem_ctrl(cdch_interface_t* p_cdc, uint16_t line_state, tuh_xfer_cb_t complete_cb, uintptr_t user_data) +{ + TU_LOG_CDCH("CDC FTDI Set Control Line State\r\n"); + p_cdc->user_control_cb = complete_cb; + TU_ASSERT(ftdi_sio_set_request(p_cdc, FTDI_SIO_MODEM_CTRL, 0x0300 | line_state, cdch_internal_control_complete, user_data)); + return true; +} + +static bool ftdi_sio_set_baudrate(cdch_interface_t* p_cdc, uint32_t baudrate, tuh_xfer_cb_t complete_cb, uintptr_t user_data) +{ + // TODO baudrate to baud divisor + (void) baudrate; + uint16_t divisor = 0x4138; // FIXME hardcoded to 9600 baud + + TU_LOG_CDCH("CDC FTDI Set BaudRate = %u, divisor = %u\n", baudrate, divisor); + + p_cdc->user_control_cb = complete_cb; + TU_ASSERT(ftdi_sio_set_request(p_cdc, FTDI_SIO_SET_BAUD_RATE, divisor, cdch_internal_control_complete, user_data)); + return true; +} + +static void process_ftdi_config(tuh_xfer_t* xfer) { + uintptr_t const state = xfer->user_data; + uint8_t const itf_num = (uint8_t) tu_le16toh(xfer->setup->wIndex); + uint8_t const idx = tuh_cdc_itf_get_index(xfer->daddr, itf_num); + cdch_interface_t * p_cdc = get_itf(idx); + TU_ASSERT(p_cdc, ); + + switch(state) { + // Note may need to read FTDI eeprom + case CONFIG_FTDI_RESET: + TU_ASSERT(ftdi_sio_reset(p_cdc, process_ftdi_config, CONFIG_FTDI_MODEM_CTRL),); + break; + + case CONFIG_FTDI_MODEM_CTRL: + #if CFG_TUH_CDC_LINE_CONTROL_ON_ENUM + TU_ASSERT( + ftdi_sio_set_modem_ctrl(p_cdc, CFG_TUH_CDC_LINE_CONTROL_ON_ENUM, process_ftdi_config, CONFIG_FTDI_SET_BAUDRATE),); + break; + #else + TU_ATTR_FALLTHROUGH; + #endif + + case CONFIG_FTDI_SET_BAUDRATE: { + #ifdef CFG_TUH_CDC_LINE_CODING_ON_ENUM + cdc_line_coding_t line_coding = CFG_TUH_CDC_LINE_CODING_ON_ENUM; + TU_ASSERT(ftdi_sio_set_baudrate(p_cdc, line_coding.bit_rate, process_ftdi_config, CONFIG_FTDI_SET_DATA),); + break; + #else + TU_ATTR_FALLTHROUGH; + #endif + } + + case CONFIG_FTDI_SET_DATA: { + #if 0 // TODO set data format + #ifdef CFG_TUH_CDC_LINE_CODING_ON_ENUM + cdc_line_coding_t line_coding = CFG_TUH_CDC_LINE_CODING_ON_ENUM; + TU_ASSERT(ftdi_sio_set_data(p_cdc, process_ftdi_config, CONFIG_FTDI_COMPLETE),); + break; + #endif + #endif + + TU_ATTR_FALLTHROUGH; + } + + case CONFIG_FTDI_COMPLETE: + set_config_complete(p_cdc, idx, itf_num); + break; + + default: + break; + } +} + +#endif + +//--------------------------------------------------------------------+ +// CP210x +//--------------------------------------------------------------------+ + +#if CFG_TUH_CDC_CP210X + +enum { + CONFIG_CP210X_IFC_ENABLE = 0, + CONFIG_CP210X_SET_BAUDRATE, + CONFIG_CP210X_SET_LINE_CTL, + CONFIG_CP210X_SET_DTR_RTS, + CONFIG_CP210X_COMPLETE +}; + +static bool cp210x_open(uint8_t daddr, tusb_desc_interface_t const *itf_desc, uint16_t max_len) { + // CP210x Interface includes 1 vendor interface + 2 bulk endpoints + TU_VERIFY(itf_desc->bInterfaceSubClass == 0 && itf_desc->bInterfaceProtocol == 0 && itf_desc->bNumEndpoints == 2); + TU_VERIFY(sizeof(tusb_desc_interface_t) + 2*sizeof(tusb_desc_endpoint_t) <= max_len); + + cdch_interface_t * p_cdc = make_new_itf(daddr, itf_desc); + TU_VERIFY(p_cdc); + + TU_LOG_CDCH("CP210x opened\r\n"); + p_cdc->serial_protocol = SERIAL_PROTOCOL_CP210X; + + // endpoint pair + tusb_desc_endpoint_t const * desc_ep = (tusb_desc_endpoint_t const *) tu_desc_next(itf_desc); + + // data endpoints expected to be in pairs + return open_ep_stream_pair(p_cdc, desc_ep); +} + +static bool cp210x_set_request(cdch_interface_t* p_cdc, uint8_t command, uint16_t value, uint8_t* buffer, uint16_t length, tuh_xfer_cb_t complete_cb, uintptr_t user_data) { + tusb_control_request_t const request = { + .bmRequestType_bit = { + .recipient = TUSB_REQ_RCPT_INTERFACE, + .type = TUSB_REQ_TYPE_VENDOR, + .direction = TUSB_DIR_OUT + }, + .bRequest = command, + .wValue = tu_htole16(value), + .wIndex = p_cdc->bInterfaceNumber, + .wLength = tu_htole16(length) + }; + + // use usbh enum buf since application variable does not live long enough + uint8_t* enum_buf = NULL; + + if (buffer && length > 0) { + enum_buf = usbh_get_enum_buf(); + tu_memcpy_s(enum_buf, CFG_TUH_ENUMERATION_BUFSIZE, buffer, length); + } + + tuh_xfer_t xfer = { + .daddr = p_cdc->daddr, + .ep_addr = 0, + .setup = &request, + .buffer = enum_buf, + .complete_cb = complete_cb, + .user_data = user_data + }; + + return tuh_control_xfer(&xfer); +} + +static bool cp210x_ifc_enable(cdch_interface_t* p_cdc, uint16_t enabled, tuh_xfer_cb_t complete_cb, uintptr_t user_data) { + return cp210x_set_request(p_cdc, CP210X_IFC_ENABLE, enabled, NULL, 0, complete_cb, user_data); +} + +static bool cp210x_set_baudrate(cdch_interface_t* p_cdc, uint32_t baudrate, tuh_xfer_cb_t complete_cb, uintptr_t user_data) { + TU_LOG_CDCH("CDC CP210x Set BaudRate = %u\n", baudrate); + baudrate = tu_htole32(baudrate); + return cp210x_set_request(p_cdc, CP210X_SET_BAUDRATE, 0, (uint8_t *) &baudrate, 4, complete_cb, user_data); +} + +static bool cp210x_set_modem_ctrl(cdch_interface_t* p_cdc, uint16_t line_state, tuh_xfer_cb_t complete_cb, uintptr_t user_data) +{ + TU_LOG_CDCH("CDC CP210x Set Control Line State\r\n"); + p_cdc->user_control_cb = complete_cb; + return cp210x_set_request(p_cdc, CP210X_SET_MHS, 0x0300 | line_state, NULL, 0, cdch_internal_control_complete, user_data); +} + +static void process_cp210x_config(tuh_xfer_t* xfer) { + uintptr_t const state = xfer->user_data; + uint8_t const itf_num = (uint8_t) tu_le16toh(xfer->setup->wIndex); + uint8_t const idx = tuh_cdc_itf_get_index(xfer->daddr, itf_num); + cdch_interface_t *p_cdc = get_itf(idx); + TU_ASSERT(p_cdc,); + + switch (state) { + case CONFIG_CP210X_IFC_ENABLE: + TU_ASSERT(cp210x_ifc_enable(p_cdc, 1, process_cp210x_config, CONFIG_CP210X_SET_BAUDRATE),); + break; + + case CONFIG_CP210X_SET_BAUDRATE: { + #ifdef CFG_TUH_CDC_LINE_CODING_ON_ENUM + cdc_line_coding_t line_coding = CFG_TUH_CDC_LINE_CODING_ON_ENUM; + TU_ASSERT(cp210x_set_baudrate(p_cdc, line_coding.bit_rate, process_cp210x_config, CONFIG_CP210X_SET_LINE_CTL),); + break; + #else + TU_ATTR_FALLTHROUGH; + #endif + } + + case CONFIG_CP210X_SET_LINE_CTL: { + #if defined(CFG_TUH_CDC_LINE_CODING_ON_ENUM) && 0 // skip for now + cdc_line_coding_t line_coding = CFG_TUH_CDC_LINE_CODING_ON_ENUM; + break; + #else + TU_ATTR_FALLTHROUGH; + #endif + } + + case CONFIG_CP210X_SET_DTR_RTS: + #if CFG_TUH_CDC_LINE_CONTROL_ON_ENUM + TU_ASSERT(cp210x_set_modem_ctrl(p_cdc, CFG_TUH_CDC_LINE_CONTROL_ON_ENUM, process_cp210x_config, CONFIG_CP210X_COMPLETE),); + break; + #else + TU_ATTR_FALLTHROUGH; + #endif + + case CONFIG_CP210X_COMPLETE: + set_config_complete(p_cdc, idx, itf_num); + break; + + default: break; + } +} + +#endif + #endif