1 /*-
38 #define	PNP0501		0x501		/* 16550A-compatible COM port */
49 	EFI_HANDLE	currdev;	/* current serial device */
50 	EFI_HANDLE	condev;		/* EFI Console device */
104 	status = BS->LocateHandle(ByProtocol, &serial, NULL, &bufsz, handles);  in efi_serial_init()
113 	 * get handle array  in efi_serial_init()
115 	status = BS->LocateHandle(ByProtocol, &serial, NULL, &bufsz, handles);  in efi_serial_init()
125  * Find serial device number from device path.
126  * Return -1 if not found.
144 			if (acpi->HID == EISA_PNP_ID(PNP0501)) {  in efi_serial_get_index()
145 				return (acpi->UID);  in efi_serial_get_index()
151 	return (-1);  in efi_serial_get_index()
156  * iterate handles, pick device path for handle, and check the device
163 	EFI_HANDLE *handles, handle;  in efi_serial_get_handle()  local
167 	if (port == -1)  in efi_serial_get_handle()
177 	 * We have console handle, set ioaddr for it.  in efi_serial_get_handle()
183 				comc_port->ioaddr =  in efi_serial_get_handle()
192 	handle = NULL;  in efi_serial_get_handle()
193 	for (index = 0; handle == NULL && index < nhandles; index++) {  in efi_serial_get_handle()
196 			handle = (handles[index]);  in efi_serial_get_handle()
201 	 * In case we did fail to identify the device by path, use port as  in efi_serial_get_handle()
202 	 * array index. Note, we did check port == -1 above.  in efi_serial_get_handle()
204 	if (port < nhandles && handle == NULL)  in efi_serial_get_handle()
205 		handle = handles[port];  in efi_serial_get_handle()
208 	return (handle);  in efi_serial_get_handle()
214 	EFI_HANDLE handle;  in comc_get_con_serial_handle()  local
237 		status = BS->LocateDevicePath(&serial, &node, &handle);  in comc_get_con_serial_handle()
240 			return (handle);  in comc_get_con_serial_handle()
247 		/* Start of next device path in list. */  in comc_get_con_serial_handle()
255  * Called from cons_probe() to see if this device is available.
263 	EFI_HANDLE handle;  in comc_probe()  local
277 	if (env == NULL || strncmp(env, "Hyper-V", 7) != 0) {  in comc_probe()
289 	comc_port->databits = 8;  in comc_probe()
290 	comc_port->parity = DefaultParity;  in comc_probe()
291 	comc_port->stopbits = DefaultStopBits;  in comc_probe()
293 	handle = NULL;  in comc_probe()
296 		comc_port->ioaddr = val;  in comc_probe()
302 		 * pick first device.  in comc_probe()
304 		handle = comc_get_con_serial_handle("ConOut");  in comc_probe()
305 		comc_port->condev = handle;  in comc_probe()
308 	handle = efi_serial_get_handle(comc_port->ioaddr, handle);  in comc_probe()
309 	if (handle != NULL) {  in comc_probe()
310 		comc_port->currdev = handle;  in comc_probe()
311 		status = BS->OpenProtocol(handle, &serial,  in comc_probe()
312 		    (void**)&comc_port->sio, IH, NULL,  in comc_probe()
316 			comc_port->sio = NULL;  in comc_probe()
318 			comc_port->newbaudrate =  in comc_probe()
319 			    comc_port->baudrate = comc_port->sio->Mode->BaudRate;  in comc_probe()
320 			comc_port->timeout = comc_port->sio->Mode->Timeout;  in comc_probe()
321 			comc_port->receivefifodepth =  in comc_probe()
322 			    comc_port->sio->Mode->ReceiveFifoDepth;  in comc_probe()
323 			comc_port->databits = comc_port->sio->Mode->DataBits;  in comc_probe()
324 			comc_port->parity = comc_port->sio->Mode->Parity;  in comc_probe()
325 			comc_port->stopbits = comc_port->sio->Mode->StopBits;  in comc_probe()
330 	 * If there's no sio, then the device isn't there, so just return since  in comc_probe()
333 	if (comc_port->sio == NULL) {  in comc_probe()
341 	snprintf(value, sizeof (value), "%u", comc_port->ioaddr);  in comc_probe()
351 		comc_port->newbaudrate = val;  in comc_probe()
355 	snprintf(value, sizeof (value), "%ju", (uintmax_t)comc_port->baudrate);  in comc_probe()
360 		sc->c_flags = C_PRESENTIN | C_PRESENTOUT;  in comc_probe()
362 		sc->c_flags &= ~(C_PRESENTIN | C_PRESENTOUT);  in comc_probe()
374 		printf("comconsole: comconsole device name is deprecated, switch to eficom\n");  in comc_probe_compat()
384  * device, comc_port will be NULL, and comc_setup will fail. It may be called
385  * even when the device isn't present as a 'fallback' console or when listed
407 	if (comc_port->sio == NULL)  in comc_putchar()
410 	for (wait = COMC_TXWAIT; wait > 0; wait--) {  in comc_putchar()
411 		status = comc_port->sio->Write(comc_port->sio, &bufsz, &cb);  in comc_putchar()
426 	 * if this device is also used as ConIn, some firmwares  in comc_getchar()
429 	if (comc_port->currdev == comc_port->condev) {  in comc_getchar()
432 		return (-1);  in comc_getchar()
435 	if (comc_port->sio == NULL)  in comc_getchar()
436 		return (-1);  in comc_getchar()
438 	status = comc_port->sio->Read(comc_port->sio, &bufsz, &c);  in comc_getchar()
440 		return (-1);  in comc_getchar()
452 	 * if this device is also used as ConIn, some firmwares  in comc_ischar()
455 	if (comc_port->currdev == comc_port->condev) {  in comc_ischar()
461 	if (comc_port->sio == NULL)  in comc_ischar()
464 	status = comc_port->sio->GetControl(comc_port->sio, &control);  in comc_ischar()
494 	EFI_HANDLE handle;  in comc_port_set()  local
503 	handle = efi_serial_get_handle(port, NULL);  in comc_port_set()
504 	if (handle == NULL) {  in comc_port_set()
505 		printf("no handle\n");  in comc_port_set()
509 	status = BS->OpenProtocol(handle, &serial,  in comc_port_set()
517 	comc_port->currdev = handle;  in comc_port_set()
518 	comc_port->ioaddr = port;  in comc_port_set()
519 	comc_port->sio = sio;  in comc_port_set()
523 	env_setenv(ev->ev_name, flags | EV_NOHOOK, value, NULL, NULL);  in comc_port_set()
538 	comc_port->newbaudrate = speed;  in comc_speed_set()
540 		env_setenv(ev->ev_name, flags | EV_NOHOOK, value, NULL, NULL);  in comc_speed_set()
556 	 * If the device isn't active, or there's no port present.  in comc_setup()
561 	if (comc_port->sio->Reset != NULL) {  in comc_setup()
562 		status = comc_port->sio->Reset(comc_port->sio);  in comc_setup()
568 	 * Avoid setting the baud rate on Hyper-V. Also, only set the baud rate  in comc_setup()
574 	if (comc_port->sio->SetAttributes != NULL &&  in comc_setup()
575 	    comc_port->newbaudrate != comc_port->baudrate) {  in comc_setup()
577 		if (ev != NULL && strncmp(ev, "Hyper-V", 7) != 0) {  in comc_setup()
578 			status = comc_port->sio->SetAttributes(comc_port->sio,  in comc_setup()
579 			    comc_port->newbaudrate, 0, 0, DefaultParity, 0,  in comc_setup()
583 			comc_port->baudrate = comc_port->newbaudrate;  in comc_setup()
588 	if (comc_port->sio->GetControl != NULL && comc_port->sio->SetControl != NULL) {  in comc_setup()
591 		status = comc_port->sio->GetControl(comc_port->sio, &control);  in comc_setup()
595 		(void) comc_port->sio->SetControl(comc_port->sio, control);  in comc_setup()