306 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr);
307 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,
309 static int  send_iosp_ext_cmd(struct edgeport_port *edge_port, __u8 command,
312 static int  send_cmd_write_baud_rate(struct edgeport_port *edge_port,
315 				struct edgeport_port *edge_port,
317 static int  send_cmd_write_uart_register(struct edgeport_port *edge_port,
319 static int  write_cmd_usb(struct edgeport_port *edge_port,
322 				struct edgeport_port *edge_port);
647 	struct edgeport_port *edge_port;  in edge_interrupt_callback()  local
718 				edge_port = usb_get_serial_port_data(port);  in edge_interrupt_callback()
719 				if (edge_port->open) {  in edge_interrupt_callback()
720 					spin_lock_irqsave(&edge_port->ep_lock,  in edge_interrupt_callback()
722 					edge_port->txCredits += txCredits;  in edge_interrupt_callback()
723 					spin_unlock_irqrestore(&edge_port->ep_lock,  in edge_interrupt_callback()
727 						edge_port->txCredits);  in edge_interrupt_callback()
731 					tty_port_tty_wakeup(&edge_port->port->port);  in edge_interrupt_callback()
735 								edge_port);  in edge_interrupt_callback()
820 	struct edgeport_port *edge_port = urb->context;  in edge_bulk_out_data_callback()  local
829 	if (edge_port->open)  in edge_bulk_out_data_callback()
830 		tty_port_tty_wakeup(&edge_port->port->port);  in edge_bulk_out_data_callback()
833 	edge_port->write_in_progress = false;  in edge_bulk_out_data_callback()
837 		(usb_get_serial_data(edge_port->port->serial)), edge_port);  in edge_bulk_out_data_callback()
848 	struct edgeport_port *edge_port = urb->context;  in edge_bulk_out_cmd_callback()  local
870 	if (edge_port->open)  in edge_bulk_out_cmd_callback()
871 		tty_port_tty_wakeup(&edge_port->port->port);  in edge_bulk_out_cmd_callback()
874 	edge_port->commandPending = false;  in edge_bulk_out_cmd_callback()
875 	wake_up(&edge_port->wait_command);  in edge_bulk_out_cmd_callback()
891 	struct edgeport_port *edge_port = usb_get_serial_port_data(port);  in edge_open()  local
897 	if (edge_port == NULL)  in edge_open()
953 	init_waitqueue_head(&edge_port->wait_open);  in edge_open()
954 	init_waitqueue_head(&edge_port->wait_chase);  in edge_open()
955 	init_waitqueue_head(&edge_port->wait_command);  in edge_open()
958 	edge_port->txCredits = 0;	/* Can't send any data yet */  in edge_open()
960 	edge_port->shadowMCR = MCR_MASTER_IE;  in edge_open()
961 	edge_port->chaseResponsePending = false;  in edge_open()
964 	edge_port->openPending = true;  in edge_open()
965 	edge_port->open        = false;  in edge_open()
966 	response = send_iosp_ext_cmd(edge_port, IOSP_CMD_OPEN_PORT, 0);  in edge_open()
970 		edge_port->openPending = false;  in edge_open()
975 	wait_event_timeout(edge_port->wait_open, !edge_port->openPending,  in edge_open()
978 	if (!edge_port->open) {  in edge_open()
981 		edge_port->openPending = false;  in edge_open()
986 	edge_port->txfifo.head	= 0;  in edge_open()
987 	edge_port->txfifo.tail	= 0;  in edge_open()
988 	edge_port->txfifo.count	= 0;  in edge_open()
989 	edge_port->txfifo.size	= edge_port->maxTxCredits;  in edge_open()
990 	edge_port->txfifo.fifo	= kmalloc(edge_port->maxTxCredits, GFP_KERNEL);  in edge_open()
992 	if (!edge_port->txfifo.fifo) {  in edge_open()
998 	edge_port->write_urb = usb_alloc_urb(0, GFP_KERNEL);  in edge_open()
999 	edge_port->write_in_progress = false;  in edge_open()
1001 	if (!edge_port->write_urb) {  in edge_open()
1007 		__func__, edge_port->maxTxCredits);  in edge_open()
1023 static void block_until_chase_response(struct edgeport_port *edge_port)  in block_until_chase_response()  argument
1025 	struct device *dev = &edge_port->port->dev;  in block_until_chase_response()
1033 		lastCredits = edge_port->txCredits;  in block_until_chase_response()
1036 		if (!edge_port->chaseResponsePending) {  in block_until_chase_response()
1040 			if (edge_port->txCredits == edge_port->maxTxCredits) {  in block_until_chase_response()
1047 		prepare_to_wait(&edge_port->wait_chase, &wait,  in block_until_chase_response()
1050 		finish_wait(&edge_port->wait_chase, &wait);  in block_until_chase_response()
1052 		if (lastCredits == edge_port->txCredits) {  in block_until_chase_response()
1056 				edge_port->chaseResponsePending = false;  in block_until_chase_response()
1063 					lastCredits, edge_port->txCredits);  in block_until_chase_response()
1080 static void block_until_tx_empty(struct edgeport_port *edge_port)  in block_until_tx_empty()  argument
1082 	struct device *dev = &edge_port->port->dev;  in block_until_tx_empty()
1084 	struct TxFifo *fifo = &edge_port->txfifo;  in block_until_tx_empty()
1100 		prepare_to_wait(&edge_port->wait_chase, &wait,  in block_until_tx_empty()
1103 		finish_wait(&edge_port->wait_chase, &wait);  in block_until_tx_empty()
1129 	struct edgeport_port *edge_port;  in edge_close()  local
1133 	edge_port = usb_get_serial_port_data(port);  in edge_close()
1134 	if (edge_serial == NULL || edge_port == NULL)  in edge_close()
1138 	block_until_tx_empty(edge_port);  in edge_close()
1140 	edge_port->closePending = true;  in edge_close()
1145 		edge_port->chaseResponsePending = true;  in edge_close()
1148 		status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);  in edge_close()
1151 			block_until_chase_response(edge_port);  in edge_close()
1153 			edge_port->chaseResponsePending = false;  in edge_close()
1160 		send_iosp_ext_cmd(edge_port, IOSP_CMD_CLOSE_PORT, 0);  in edge_close()
1164 	edge_port->closePending = false;  in edge_close()
1165 	edge_port->open = false;  in edge_close()
1166 	edge_port->openPending = false;  in edge_close()
1168 	usb_kill_urb(edge_port->write_urb);  in edge_close()
1170 	if (edge_port->write_urb) {  in edge_close()
1173 		kfree(edge_port->write_urb->transfer_buffer);  in edge_close()
1174 		usb_free_urb(edge_port->write_urb);  in edge_close()
1175 		edge_port->write_urb = NULL;  in edge_close()
1177 	kfree(edge_port->txfifo.fifo);  in edge_close()
1178 	edge_port->txfifo.fifo = NULL;  in edge_close()
1191 	struct edgeport_port *edge_port = usb_get_serial_port_data(port);  in edge_write()  local
1199 	if (edge_port == NULL)  in edge_write()
1203 	fifo = &edge_port->txfifo;  in edge_write()
1205 	spin_lock_irqsave(&edge_port->ep_lock, flags);  in edge_write()
1209 				(edge_port->txCredits - fifo->count));  in edge_write()
1212 		__func__, count, edge_port->txCredits - fifo->count, copySize);  in edge_write()
1260 	spin_unlock_irqrestore(&edge_port->ep_lock, flags);  in edge_write()
1263 			usb_get_serial_data(port->serial), edge_port);  in edge_write()
1266 		__func__, copySize, edge_port->txCredits, fifo->count);  in edge_write()
1286 					struct edgeport_port *edge_port)  in send_more_port_data()  argument
1288 	struct TxFifo	*fifo = &edge_port->txfifo;  in send_more_port_data()
1289 	struct device	*dev = &edge_port->port->dev;  in send_more_port_data()
1299 	spin_lock_irqsave(&edge_port->ep_lock, flags);  in send_more_port_data()
1301 	if (edge_port->write_in_progress ||  in send_more_port_data()
1302 	    !edge_port->open             ||  in send_more_port_data()
1305 			__func__, fifo->count, edge_port->write_in_progress);  in send_more_port_data()
1316 …if (edge_port->txCredits < EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port->maxTxCredits, EDGE_FW_…  in send_more_port_data()
1318 			__func__, fifo->count, edge_port->txCredits);  in send_more_port_data()
1323 	edge_port->write_in_progress = true;  in send_more_port_data()
1326 	urb = edge_port->write_urb;  in send_more_port_data()
1337 		edge_port->write_in_progress = false;  in send_more_port_data()
1340 	buffer[0] = IOSP_BUILD_DATA_HDR1(edge_port->port->port_number, count);  in send_more_port_data()
1341 	buffer[1] = IOSP_BUILD_DATA_HDR2(edge_port->port->port_number, count);  in send_more_port_data()
1361 		usb_serial_debug_data(&edge_port->port->dev, __func__, count, &buffer[2]);  in send_more_port_data()
1368 			edge_bulk_out_data_callback, edge_port);  in send_more_port_data()
1371 	edge_port->txCredits -= count;  in send_more_port_data()
1372 	edge_port->port->icount.tx += count;  in send_more_port_data()
1377 		dev_err_console(edge_port->port,  in send_more_port_data()
1380 		edge_port->write_in_progress = false;  in send_more_port_data()
1383 		edge_port->txCredits += count;  in send_more_port_data()
1384 		edge_port->port->icount.tx -= count;  in send_more_port_data()
1387 		__func__, count, edge_port->txCredits, fifo->count);  in send_more_port_data()
1390 	spin_unlock_irqrestore(&edge_port->ep_lock, flags);  in send_more_port_data()
1404 	struct edgeport_port *edge_port = usb_get_serial_port_data(port);  in edge_write_room()  local
1408 	if (edge_port == NULL)  in edge_write_room()
1410 	if (edge_port->closePending)  in edge_write_room()
1413 	if (!edge_port->open) {  in edge_write_room()
1419 	spin_lock_irqsave(&edge_port->ep_lock, flags);  in edge_write_room()
1420 	room = edge_port->txCredits - edge_port->txfifo.count;  in edge_write_room()
1421 	spin_unlock_irqrestore(&edge_port->ep_lock, flags);  in edge_write_room()
1440 	struct edgeport_port *edge_port = usb_get_serial_port_data(port);  in edge_chars_in_buffer()  local
1444 	if (edge_port == NULL)  in edge_chars_in_buffer()
1446 	if (edge_port->closePending)  in edge_chars_in_buffer()
1449 	if (!edge_port->open) {  in edge_chars_in_buffer()
1454 	spin_lock_irqsave(&edge_port->ep_lock, flags);  in edge_chars_in_buffer()
1455 	num_chars = edge_port->maxTxCredits - edge_port->txCredits +  in edge_chars_in_buffer()
1456 						edge_port->txfifo.count;  in edge_chars_in_buffer()
1457 	spin_unlock_irqrestore(&edge_port->ep_lock, flags);  in edge_chars_in_buffer()
1474 	struct edgeport_port *edge_port = usb_get_serial_port_data(port);  in edge_throttle()  local
1477 	if (edge_port == NULL)  in edge_throttle()
1480 	if (!edge_port->open) {  in edge_throttle()
1495 		edge_port->shadowMCR &= ~MCR_RTS;  in edge_throttle()
1496 		status = send_cmd_write_uart_register(edge_port, MCR,  in edge_throttle()
1497 							edge_port->shadowMCR);  in edge_throttle()
1512 	struct edgeport_port *edge_port = usb_get_serial_port_data(port);  in edge_unthrottle()  local
1515 	if (edge_port == NULL)  in edge_unthrottle()
1518 	if (!edge_port->open) {  in edge_unthrottle()
1532 		edge_port->shadowMCR |= MCR_RTS;  in edge_unthrottle()
1533 		send_cmd_write_uart_register(edge_port, MCR,  in edge_unthrottle()
1534 						edge_port->shadowMCR);  in edge_unthrottle()
1547 	struct edgeport_port *edge_port = usb_get_serial_port_data(port);  in edge_set_termios()  local
1549 	if (edge_port == NULL)  in edge_set_termios()
1552 	if (!edge_port->open) {  in edge_set_termios()
1558 	change_port_settings(tty, edge_port, old_termios);  in edge_set_termios()
1572 static int get_lsr_info(struct edgeport_port *edge_port,  in get_lsr_info()  argument
1578 	spin_lock_irqsave(&edge_port->ep_lock, flags);  in get_lsr_info()
1579 	if (edge_port->maxTxCredits == edge_port->txCredits &&  in get_lsr_info()
1580 	    edge_port->txfifo.count == 0) {  in get_lsr_info()
1581 		dev_dbg(&edge_port->port->dev, "%s -- Empty\n", __func__);  in get_lsr_info()
1584 	spin_unlock_irqrestore(&edge_port->ep_lock, flags);  in get_lsr_info()
1595 	struct edgeport_port *edge_port = usb_get_serial_port_data(port);  in edge_tiocmset()  local
1598 	mcr = edge_port->shadowMCR;  in edge_tiocmset()
1613 	edge_port->shadowMCR = mcr;  in edge_tiocmset()
1615 	send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);  in edge_tiocmset()
1623 	struct edgeport_port *edge_port = usb_get_serial_port_data(port);  in edge_tiocmget()  local
1628 	msr = edge_port->shadowMSR;  in edge_tiocmget()
1629 	mcr = edge_port->shadowMCR;  in edge_tiocmget()
1640 static int get_serial_info(struct edgeport_port *edge_port,  in get_serial_info()  argument
1648 	tmp.line		= edge_port->port->minor;  in get_serial_info()
1649 	tmp.port		= edge_port->port->port_number;  in get_serial_info()
1651 	tmp.xmit_fifo_size	= edge_port->maxTxCredits;  in get_serial_info()
1671 	struct edgeport_port *edge_port = usb_get_serial_port_data(port);  in edge_ioctl()  local
1676 		return get_lsr_info(edge_port, (unsigned int __user *) arg);  in edge_ioctl()
1680 		return get_serial_info(edge_port, (struct serial_struct __user *) arg);  in edge_ioctl()
1693 	struct edgeport_port *edge_port = usb_get_serial_port_data(port);  in edge_break()  local
1700 		edge_port->chaseResponsePending = true;  in edge_break()
1703 		status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);  in edge_break()
1706 			block_until_chase_response(edge_port);  in edge_break()
1708 			edge_port->chaseResponsePending = false;  in edge_break()
1716 			status = send_iosp_ext_cmd(edge_port,  in edge_break()
1720 			status = send_iosp_ext_cmd(edge_port,  in edge_break()
1739 	struct edgeport_port *edge_port;  in process_rcvd_data()  local
1845 				edge_port = usb_get_serial_port_data(port);  in process_rcvd_data()
1846 				if (edge_port->open) {  in process_rcvd_data()
1850 					edge_tty_recv(edge_port->port, buffer,  in process_rcvd_data()
1852 					edge_port->port->icount.rx += rxLen;  in process_rcvd_data()
1884 	struct edgeport_port *edge_port;  in process_rcvd_status()  local
1891 	edge_port = usb_get_serial_port_data(port);  in process_rcvd_status()
1892 	if (edge_port == NULL) {  in process_rcvd_status()
1916 			edge_port->chaseResponsePending = false;  in process_rcvd_status()
1917 			wake_up(&edge_port->wait_chase);  in process_rcvd_status()
1929 		edge_port->txCredits = GET_TX_BUFFER_SIZE(byte3);  in process_rcvd_status()
1930 		edge_port->maxTxCredits = edge_port->txCredits;  in process_rcvd_status()
1932 			__func__, edge_serial->rxPort, byte2, edge_port->txCredits);  in process_rcvd_status()
1933 		handle_new_msr(edge_port, byte2);  in process_rcvd_status()
1937 		tty = tty_port_tty_get(&edge_port->port->port);  in process_rcvd_status()
1940 				edge_port, &tty->termios);  in process_rcvd_status()
1945 		edge_port->openPending = false;  in process_rcvd_status()
1946 		edge_port->open = true;  in process_rcvd_status()
1947 		wake_up(&edge_port->wait_open);  in process_rcvd_status()
1955 	if (!edge_port->open || edge_port->closePending)  in process_rcvd_status()
1963 		handle_new_lsr(edge_port, false, byte2, 0);  in process_rcvd_status()
1971 		handle_new_lsr(edge_port, true, byte2, byte3);  in process_rcvd_status()
1987 		handle_new_msr(edge_port, byte2);  in process_rcvd_status()
2022 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr)  in handle_new_msr()  argument
2028 		icount = &edge_port->port->icount;  in handle_new_msr()
2039 		wake_up_interruptible(&edge_port->port->port.delta_msr_wait);  in handle_new_msr()
2043 	edge_port->shadowMSR = newMsr & 0xf0;  in handle_new_msr()
2051 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,  in handle_new_lsr()  argument
2058 	edge_port->shadowLSR = lsr;  in handle_new_lsr()
2071 		edge_tty_recv(edge_port->port, &data, 1);  in handle_new_lsr()
2074 	icount = &edge_port->port->icount;  in handle_new_lsr()
2227 static int send_iosp_ext_cmd(struct edgeport_port *edge_port,  in send_iosp_ext_cmd()  argument
2241 	MAKE_CMD_EXT_CMD(&currentCommand, &length, edge_port->port->port_number,  in send_iosp_ext_cmd()
2244 	status = write_cmd_usb(edge_port, buffer, length);  in send_iosp_ext_cmd()
2258 static int write_cmd_usb(struct edgeport_port *edge_port,  in write_cmd_usb()  argument
2262 				usb_get_serial_data(edge_port->port->serial);  in write_cmd_usb()
2263 	struct device *dev = &edge_port->port->dev;  in write_cmd_usb()
2281 			buffer, length, edge_bulk_out_cmd_callback, edge_port);  in write_cmd_usb()
2283 	edge_port->commandPending = true;  in write_cmd_usb()
2296 	wait_event(&edge_port->wait_command, !edge_port->commandPending);  in write_cmd_usb()
2298 	if (edge_port->commandPending) {  in write_cmd_usb()
2313 static int send_cmd_write_baud_rate(struct edgeport_port *edge_port,  in send_cmd_write_baud_rate()  argument
2317 				usb_get_serial_data(edge_port->port->serial);  in send_cmd_write_baud_rate()
2318 	struct device *dev = &edge_port->port->dev;  in send_cmd_write_baud_rate()
2324 	u32 number = edge_port->port->port_number;  in send_cmd_write_baud_rate()
2357 						edge_port->shadowLCR);  in send_cmd_write_baud_rate()
2359 	status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);  in send_cmd_write_baud_rate()
2407 static int send_cmd_write_uart_register(struct edgeport_port *edge_port,  in send_cmd_write_uart_register()  argument
2411 				usb_get_serial_data(edge_port->port->serial);  in send_cmd_write_uart_register()
2412 	struct device *dev = &edge_port->port->dev;  in send_cmd_write_uart_register()
2443 	MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, edge_port->port->port_number,  in send_cmd_write_uart_register()
2446 	status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);  in send_cmd_write_uart_register()
2463 	struct edgeport_port *edge_port, struct ktermios *old_termios)  in change_port_settings()  argument
2465 	struct device *dev = &edge_port->port->dev;  in change_port_settings()
2467 			usb_get_serial_data(edge_port->port->serial);  in change_port_settings()
2478 	if (!edge_port->open &&  in change_port_settings()
2479 	    !edge_port->openPending) {  in change_port_settings()
2553 			send_iosp_ext_cmd(edge_port,  in change_port_settings()
2555 			send_iosp_ext_cmd(edge_port,  in change_port_settings()
2581 		send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow);  in change_port_settings()
2584 		send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_TX_FLOW, txFlow);  in change_port_settings()
2587 	edge_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);  in change_port_settings()
2588 	edge_port->shadowLCR |= (lData | lParity | lStop);  in change_port_settings()
2590 	edge_port->validDataMask = mask;  in change_port_settings()
2593 	status = send_cmd_write_uart_register(edge_port, LCR,  in change_port_settings()
2594 							edge_port->shadowLCR);  in change_port_settings()
2599 	edge_port->shadowMCR = MCR_MASTER_IE;  in change_port_settings()
2601 		edge_port->shadowMCR |= (MCR_DTR | MCR_RTS);  in change_port_settings()
2603 	status = send_cmd_write_uart_register(edge_port, MCR,  in change_port_settings()
2604 						edge_port->shadowMCR);  in change_port_settings()
2616 	status = send_cmd_write_baud_rate(edge_port, baud);  in change_port_settings()
3081 	struct edgeport_port *edge_port;  in edge_port_probe()  local
3083 	edge_port = kzalloc(sizeof(*edge_port), GFP_KERNEL);  in edge_port_probe()
3084 	if (!edge_port)  in edge_port_probe()
3087 	spin_lock_init(&edge_port->ep_lock);  in edge_port_probe()
3088 	edge_port->port = port;  in edge_port_probe()
3090 	usb_set_serial_port_data(port, edge_port);  in edge_port_probe()
3097 	struct edgeport_port *edge_port;  in edge_port_remove()  local
3099 	edge_port = usb_get_serial_port_data(port);  in edge_port_remove()
3100 	kfree(edge_port);  in edge_port_remove()