230 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr);
231 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,
233 static int  send_iosp_ext_cmd(struct edgeport_port *edge_port, __u8 command,
236 static int  send_cmd_write_baud_rate(struct edgeport_port *edge_port,
239 				struct edgeport_port *edge_port,
241 static int  send_cmd_write_uart_register(struct edgeport_port *edge_port,
243 static int  write_cmd_usb(struct edgeport_port *edge_port,
246 				struct edgeport_port *edge_port);
559 	struct edgeport_port *edge_port;  in edge_interrupt_callback()  local
628 				edge_port = usb_get_serial_port_data(port);  in edge_interrupt_callback()
629 				if (edge_port->open) {  in edge_interrupt_callback()
630 					spin_lock(&edge_port->ep_lock);  in edge_interrupt_callback()
631 					edge_port->txCredits += txCredits;  in edge_interrupt_callback()
632 					spin_unlock(&edge_port->ep_lock);  in edge_interrupt_callback()
635 						edge_port->txCredits);  in edge_interrupt_callback()
639 					tty_port_tty_wakeup(&edge_port->port->port);  in edge_interrupt_callback()
643 								edge_port);  in edge_interrupt_callback()
727 	struct edgeport_port *edge_port = urb->context;  in edge_bulk_out_data_callback()  local
736 	if (edge_port->open)  in edge_bulk_out_data_callback()
737 		tty_port_tty_wakeup(&edge_port->port->port);  in edge_bulk_out_data_callback()
740 	edge_port->write_in_progress = false;  in edge_bulk_out_data_callback()
744 		(usb_get_serial_data(edge_port->port->serial)), edge_port);  in edge_bulk_out_data_callback()
755 	struct edgeport_port *edge_port = urb->context;  in edge_bulk_out_cmd_callback()  local
777 	if (edge_port->open)  in edge_bulk_out_cmd_callback()
778 		tty_port_tty_wakeup(&edge_port->port->port);  in edge_bulk_out_cmd_callback()
781 	edge_port->commandPending = false;  in edge_bulk_out_cmd_callback()
782 	wake_up(&edge_port->wait_command);  in edge_bulk_out_cmd_callback()
798 	struct edgeport_port *edge_port = usb_get_serial_port_data(port);  in edge_open()  local
804 	if (edge_port == NULL)  in edge_open()
860 	init_waitqueue_head(&edge_port->wait_open);  in edge_open()
861 	init_waitqueue_head(&edge_port->wait_chase);  in edge_open()
862 	init_waitqueue_head(&edge_port->wait_command);  in edge_open()
865 	edge_port->txCredits = 0;	/* Can't send any data yet */  in edge_open()
867 	edge_port->shadowMCR = MCR_MASTER_IE;  in edge_open()
868 	edge_port->chaseResponsePending = false;  in edge_open()
871 	edge_port->openPending = true;  in edge_open()
872 	edge_port->open        = false;  in edge_open()
873 	response = send_iosp_ext_cmd(edge_port, IOSP_CMD_OPEN_PORT, 0);  in edge_open()
877 		edge_port->openPending = false;  in edge_open()
882 	wait_event_timeout(edge_port->wait_open, !edge_port->openPending,  in edge_open()
885 	if (!edge_port->open) {  in edge_open()
888 		edge_port->openPending = false;  in edge_open()
893 	edge_port->txfifo.head	= 0;  in edge_open()
894 	edge_port->txfifo.tail	= 0;  in edge_open()
895 	edge_port->txfifo.count	= 0;  in edge_open()
896 	edge_port->txfifo.size	= edge_port->maxTxCredits;  in edge_open()
897 	edge_port->txfifo.fifo	= kmalloc(edge_port->maxTxCredits, GFP_KERNEL);  in edge_open()
899 	if (!edge_port->txfifo.fifo) {  in edge_open()
905 	edge_port->write_urb = usb_alloc_urb(0, GFP_KERNEL);  in edge_open()
906 	edge_port->write_in_progress = false;  in edge_open()
908 	if (!edge_port->write_urb) {  in edge_open()
914 		__func__, edge_port->maxTxCredits);  in edge_open()
930 static void block_until_chase_response(struct edgeport_port *edge_port)  in block_until_chase_response()  argument
932 	struct device *dev = &edge_port->port->dev;  in block_until_chase_response()
940 		lastCredits = edge_port->txCredits;  in block_until_chase_response()
943 		if (!edge_port->chaseResponsePending) {  in block_until_chase_response()
947 			if (edge_port->txCredits == edge_port->maxTxCredits) {  in block_until_chase_response()
954 		prepare_to_wait(&edge_port->wait_chase, &wait,  in block_until_chase_response()
957 		finish_wait(&edge_port->wait_chase, &wait);  in block_until_chase_response()
959 		if (lastCredits == edge_port->txCredits) {  in block_until_chase_response()
963 				edge_port->chaseResponsePending = false;  in block_until_chase_response()
970 					lastCredits, edge_port->txCredits);  in block_until_chase_response()
987 static void block_until_tx_empty(struct edgeport_port *edge_port)  in block_until_tx_empty()  argument
989 	struct device *dev = &edge_port->port->dev;  in block_until_tx_empty()
991 	struct TxFifo *fifo = &edge_port->txfifo;  in block_until_tx_empty()
1007 		prepare_to_wait(&edge_port->wait_chase, &wait,  in block_until_tx_empty()
1010 		finish_wait(&edge_port->wait_chase, &wait);  in block_until_tx_empty()
1036 	struct edgeport_port *edge_port;  in edge_close()  local
1040 	edge_port = usb_get_serial_port_data(port);  in edge_close()
1041 	if (edge_serial == NULL || edge_port == NULL)  in edge_close()
1045 	block_until_tx_empty(edge_port);  in edge_close()
1047 	edge_port->closePending = true;  in edge_close()
1053 		edge_port->chaseResponsePending = true;  in edge_close()
1056 		status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);  in edge_close()
1059 			block_until_chase_response(edge_port);  in edge_close()
1061 			edge_port->chaseResponsePending = false;  in edge_close()
1069 		send_iosp_ext_cmd(edge_port, IOSP_CMD_CLOSE_PORT, 0);  in edge_close()
1073 	edge_port->closePending = false;  in edge_close()
1074 	edge_port->open = false;  in edge_close()
1075 	edge_port->openPending = false;  in edge_close()
1077 	usb_kill_urb(edge_port->write_urb);  in edge_close()
1079 	if (edge_port->write_urb) {  in edge_close()
1082 		kfree(edge_port->write_urb->transfer_buffer);  in edge_close()
1083 		usb_free_urb(edge_port->write_urb);  in edge_close()
1084 		edge_port->write_urb = NULL;  in edge_close()
1086 	kfree(edge_port->txfifo.fifo);  in edge_close()
1087 	edge_port->txfifo.fifo = NULL;  in edge_close()
1100 	struct edgeport_port *edge_port = usb_get_serial_port_data(port);  in edge_write()  local
1108 	if (edge_port == NULL)  in edge_write()
1112 	fifo = &edge_port->txfifo;  in edge_write()
1114 	spin_lock_irqsave(&edge_port->ep_lock, flags);  in edge_write()
1118 				(edge_port->txCredits - fifo->count));  in edge_write()
1121 		__func__, count, edge_port->txCredits - fifo->count, copySize);  in edge_write()
1169 	spin_unlock_irqrestore(&edge_port->ep_lock, flags);  in edge_write()
1172 			usb_get_serial_data(port->serial), edge_port);  in edge_write()
1175 		__func__, copySize, edge_port->txCredits, fifo->count);  in edge_write()
1195 					struct edgeport_port *edge_port)  in send_more_port_data()  argument
1197 	struct TxFifo	*fifo = &edge_port->txfifo;  in send_more_port_data()
1198 	struct device	*dev = &edge_port->port->dev;  in send_more_port_data()
1208 	spin_lock_irqsave(&edge_port->ep_lock, flags);  in send_more_port_data()
1210 	if (edge_port->write_in_progress ||  in send_more_port_data()
1211 	    !edge_port->open             ||  in send_more_port_data()
1214 			__func__, fifo->count, edge_port->write_in_progress);  in send_more_port_data()
1225 …if (edge_port->txCredits < EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port->maxTxCredits, EDGE_FW_…  in send_more_port_data()
1227 			__func__, fifo->count, edge_port->txCredits);  in send_more_port_data()
1232 	edge_port->write_in_progress = true;  in send_more_port_data()
1235 	urb = edge_port->write_urb;  in send_more_port_data()
1246 		edge_port->write_in_progress = false;  in send_more_port_data()
1249 	buffer[0] = IOSP_BUILD_DATA_HDR1(edge_port->port->port_number, count);  in send_more_port_data()
1250 	buffer[1] = IOSP_BUILD_DATA_HDR2(edge_port->port->port_number, count);  in send_more_port_data()
1270 		usb_serial_debug_data(&edge_port->port->dev, __func__, count, &buffer[2]);  in send_more_port_data()
1277 			edge_bulk_out_data_callback, edge_port);  in send_more_port_data()
1280 	edge_port->txCredits -= count;  in send_more_port_data()
1281 	edge_port->port->icount.tx += count;  in send_more_port_data()
1286 		dev_err_console(edge_port->port,  in send_more_port_data()
1289 		edge_port->write_in_progress = false;  in send_more_port_data()
1292 		edge_port->txCredits += count;  in send_more_port_data()
1293 		edge_port->port->icount.tx -= count;  in send_more_port_data()
1296 		__func__, count, edge_port->txCredits, fifo->count);  in send_more_port_data()
1299 	spin_unlock_irqrestore(&edge_port->ep_lock, flags);  in send_more_port_data()
1313 	struct edgeport_port *edge_port = usb_get_serial_port_data(port);  in edge_write_room()  local
1317 	if (edge_port == NULL)  in edge_write_room()
1319 	if (edge_port->closePending)  in edge_write_room()
1322 	if (!edge_port->open) {  in edge_write_room()
1328 	spin_lock_irqsave(&edge_port->ep_lock, flags);  in edge_write_room()
1329 	room = edge_port->txCredits - edge_port->txfifo.count;  in edge_write_room()
1330 	spin_unlock_irqrestore(&edge_port->ep_lock, flags);  in edge_write_room()
1349 	struct edgeport_port *edge_port = usb_get_serial_port_data(port);  in edge_chars_in_buffer()  local
1353 	if (edge_port == NULL)  in edge_chars_in_buffer()
1355 	if (edge_port->closePending)  in edge_chars_in_buffer()
1358 	if (!edge_port->open) {  in edge_chars_in_buffer()
1363 	spin_lock_irqsave(&edge_port->ep_lock, flags);  in edge_chars_in_buffer()
1364 	num_chars = edge_port->maxTxCredits - edge_port->txCredits +  in edge_chars_in_buffer()
1365 						edge_port->txfifo.count;  in edge_chars_in_buffer()
1366 	spin_unlock_irqrestore(&edge_port->ep_lock, flags);  in edge_chars_in_buffer()
1383 	struct edgeport_port *edge_port = usb_get_serial_port_data(port);  in edge_throttle()  local
1386 	if (edge_port == NULL)  in edge_throttle()
1389 	if (!edge_port->open) {  in edge_throttle()
1404 		edge_port->shadowMCR &= ~MCR_RTS;  in edge_throttle()
1405 		status = send_cmd_write_uart_register(edge_port, MCR,  in edge_throttle()
1406 							edge_port->shadowMCR);  in edge_throttle()
1421 	struct edgeport_port *edge_port = usb_get_serial_port_data(port);  in edge_unthrottle()  local
1424 	if (edge_port == NULL)  in edge_unthrottle()
1427 	if (!edge_port->open) {  in edge_unthrottle()
1441 		edge_port->shadowMCR |= MCR_RTS;  in edge_unthrottle()
1442 		send_cmd_write_uart_register(edge_port, MCR,  in edge_unthrottle()
1443 						edge_port->shadowMCR);  in edge_unthrottle()
1456 	struct edgeport_port *edge_port = usb_get_serial_port_data(port);  in edge_set_termios()  local
1463 	if (edge_port == NULL)  in edge_set_termios()
1466 	if (!edge_port->open) {  in edge_set_termios()
1472 	change_port_settings(tty, edge_port, old_termios);  in edge_set_termios()
1486 static int get_lsr_info(struct edgeport_port *edge_port,  in get_lsr_info()  argument
1492 	spin_lock_irqsave(&edge_port->ep_lock, flags);  in get_lsr_info()
1493 	if (edge_port->maxTxCredits == edge_port->txCredits &&  in get_lsr_info()
1494 	    edge_port->txfifo.count == 0) {  in get_lsr_info()
1495 		dev_dbg(&edge_port->port->dev, "%s -- Empty\n", __func__);  in get_lsr_info()
1498 	spin_unlock_irqrestore(&edge_port->ep_lock, flags);  in get_lsr_info()
1509 	struct edgeport_port *edge_port = usb_get_serial_port_data(port);  in edge_tiocmset()  local
1512 	mcr = edge_port->shadowMCR;  in edge_tiocmset()
1527 	edge_port->shadowMCR = mcr;  in edge_tiocmset()
1529 	send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);  in edge_tiocmset()
1537 	struct edgeport_port *edge_port = usb_get_serial_port_data(port);  in edge_tiocmget()  local
1542 	msr = edge_port->shadowMSR;  in edge_tiocmget()
1543 	mcr = edge_port->shadowMCR;  in edge_tiocmget()
1554 static int get_serial_info(struct edgeport_port *edge_port,  in get_serial_info()  argument
1565 	tmp.line		= edge_port->port->minor;  in get_serial_info()
1566 	tmp.port		= edge_port->port->port_number;  in get_serial_info()
1569 	tmp.xmit_fifo_size	= edge_port->maxTxCredits;  in get_serial_info()
1589 	struct edgeport_port *edge_port = usb_get_serial_port_data(port);  in edge_ioctl()  local
1594 		return get_lsr_info(edge_port, (unsigned int __user *) arg);  in edge_ioctl()
1598 		return get_serial_info(edge_port, (struct serial_struct __user *) arg);  in edge_ioctl()
1611 	struct edgeport_port *edge_port = usb_get_serial_port_data(port);  in edge_break()  local
1619 		edge_port->chaseResponsePending = true;  in edge_break()
1622 		status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);  in edge_break()
1625 			block_until_chase_response(edge_port);  in edge_break()
1627 			edge_port->chaseResponsePending = false;  in edge_break()
1636 			status = send_iosp_ext_cmd(edge_port,  in edge_break()
1640 			status = send_iosp_ext_cmd(edge_port,  in edge_break()
1659 	struct edgeport_port *edge_port;  in process_rcvd_data()  local
1765 				edge_port = usb_get_serial_port_data(port);  in process_rcvd_data()
1766 				if (edge_port->open) {  in process_rcvd_data()
1770 					edge_tty_recv(edge_port->port, buffer,  in process_rcvd_data()
1772 					edge_port->port->icount.rx += rxLen;  in process_rcvd_data()
1804 	struct edgeport_port *edge_port;  in process_rcvd_status()  local
1811 	edge_port = usb_get_serial_port_data(port);  in process_rcvd_status()
1812 	if (edge_port == NULL) {  in process_rcvd_status()
1836 			edge_port->chaseResponsePending = false;  in process_rcvd_status()
1837 			wake_up(&edge_port->wait_chase);  in process_rcvd_status()
1849 		edge_port->txCredits = GET_TX_BUFFER_SIZE(byte3);  in process_rcvd_status()
1850 		edge_port->maxTxCredits = edge_port->txCredits;  in process_rcvd_status()
1852 			__func__, edge_serial->rxPort, byte2, edge_port->txCredits);  in process_rcvd_status()
1853 		handle_new_msr(edge_port, byte2);  in process_rcvd_status()
1857 		tty = tty_port_tty_get(&edge_port->port->port);  in process_rcvd_status()
1860 				edge_port, &tty->termios);  in process_rcvd_status()
1865 		edge_port->openPending = false;  in process_rcvd_status()
1866 		edge_port->open = true;  in process_rcvd_status()
1867 		wake_up(&edge_port->wait_open);  in process_rcvd_status()
1875 	if (!edge_port->open || edge_port->closePending)  in process_rcvd_status()
1883 		handle_new_lsr(edge_port, false, byte2, 0);  in process_rcvd_status()
1891 		handle_new_lsr(edge_port, true, byte2, byte3);  in process_rcvd_status()
1907 		handle_new_msr(edge_port, byte2);  in process_rcvd_status()
1942 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr)  in handle_new_msr()  argument
1948 		icount = &edge_port->port->icount;  in handle_new_msr()
1959 		wake_up_interruptible(&edge_port->port->port.delta_msr_wait);  in handle_new_msr()
1963 	edge_port->shadowMSR = newMsr & 0xf0;  in handle_new_msr()
1971 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,  in handle_new_lsr()  argument
1978 	edge_port->shadowLSR = lsr;  in handle_new_lsr()
1991 		edge_tty_recv(edge_port->port, &data, 1);  in handle_new_lsr()
1994 	icount = &edge_port->port->icount;  in handle_new_lsr()
2143 static int send_iosp_ext_cmd(struct edgeport_port *edge_port,  in send_iosp_ext_cmd()  argument
2157 	MAKE_CMD_EXT_CMD(&currentCommand, &length, edge_port->port->port_number,  in send_iosp_ext_cmd()
2160 	status = write_cmd_usb(edge_port, buffer, length);  in send_iosp_ext_cmd()
2174 static int write_cmd_usb(struct edgeport_port *edge_port,  in write_cmd_usb()  argument
2178 				usb_get_serial_data(edge_port->port->serial);  in write_cmd_usb()
2179 	struct device *dev = &edge_port->port->dev;  in write_cmd_usb()
2197 			buffer, length, edge_bulk_out_cmd_callback, edge_port);  in write_cmd_usb()
2199 	edge_port->commandPending = true;  in write_cmd_usb()
2213 	wait_event(&edge_port->wait_command, !edge_port->commandPending);  in write_cmd_usb()
2215 	if (edge_port->commandPending) {  in write_cmd_usb()
2230 static int send_cmd_write_baud_rate(struct edgeport_port *edge_port,  in send_cmd_write_baud_rate()  argument
2234 				usb_get_serial_data(edge_port->port->serial);  in send_cmd_write_baud_rate()
2235 	struct device *dev = &edge_port->port->dev;  in send_cmd_write_baud_rate()
2241 	u32 number = edge_port->port->port_number;  in send_cmd_write_baud_rate()
2274 						edge_port->shadowLCR);  in send_cmd_write_baud_rate()
2276 	status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);  in send_cmd_write_baud_rate()
2324 static int send_cmd_write_uart_register(struct edgeport_port *edge_port,  in send_cmd_write_uart_register()  argument
2328 				usb_get_serial_data(edge_port->port->serial);  in send_cmd_write_uart_register()
2329 	struct device *dev = &edge_port->port->dev;  in send_cmd_write_uart_register()
2360 	MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, edge_port->port->port_number,  in send_cmd_write_uart_register()
2363 	status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);  in send_cmd_write_uart_register()
2380 	struct edgeport_port *edge_port, struct ktermios *old_termios)  in change_port_settings()  argument
2382 	struct device *dev = &edge_port->port->dev;  in change_port_settings()
2384 			usb_get_serial_data(edge_port->port->serial);  in change_port_settings()
2395 	if (!edge_port->open &&  in change_port_settings()
2396 	    !edge_port->openPending) {  in change_port_settings()
2471 			send_iosp_ext_cmd(edge_port,  in change_port_settings()
2473 			send_iosp_ext_cmd(edge_port,  in change_port_settings()
2500 		send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow);  in change_port_settings()
2504 		send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_TX_FLOW, txFlow);  in change_port_settings()
2507 	edge_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);  in change_port_settings()
2508 	edge_port->shadowLCR |= (lData | lParity | lStop);  in change_port_settings()
2510 	edge_port->validDataMask = mask;  in change_port_settings()
2513 	status = send_cmd_write_uart_register(edge_port, LCR,  in change_port_settings()
2514 							edge_port->shadowLCR);  in change_port_settings()
2519 	edge_port->shadowMCR = MCR_MASTER_IE;  in change_port_settings()
2521 		edge_port->shadowMCR |= (MCR_DTR | MCR_RTS);  in change_port_settings()
2523 	status = send_cmd_write_uart_register(edge_port, MCR,  in change_port_settings()
2524 						edge_port->shadowMCR);  in change_port_settings()
2536 	status = send_cmd_write_baud_rate(edge_port, baud);  in change_port_settings()
2999 	struct edgeport_port *edge_port;  in edge_port_probe()  local
3001 	edge_port = kzalloc(sizeof(*edge_port), GFP_KERNEL);  in edge_port_probe()
3002 	if (!edge_port)  in edge_port_probe()
3005 	spin_lock_init(&edge_port->ep_lock);  in edge_port_probe()
3006 	edge_port->port = port;  in edge_port_probe()
3008 	usb_set_serial_port_data(port, edge_port);  in edge_port_probe()
3015 	struct edgeport_port *edge_port;  in edge_port_remove()  local
3017 	edge_port = usb_get_serial_port_data(port);  in edge_port_remove()
3018 	kfree(edge_port);  in edge_port_remove()