102 struct sscom_softc {  struct
103 	device_t sc_dev;
104 	void *sc_si;
105 	struct tty *sc_tty;
107 	struct callout sc_diag_callout;
109 	int sc_unit;			/* UART0/UART1 */
110 	int sc_frequency;
112 	bus_space_tag_t sc_iot;
113 	bus_space_handle_t sc_ioh;
115 	u_int sc_overflows,
116 	      sc_floods,
117 	      sc_errors;
119 	int sc_hwflags,
120 	    sc_swflags;
122 	u_int sc_r_hiwat,
123 	      sc_r_lowat;
124 	u_char *volatile sc_rbget,
125 	       *volatile sc_rbput;
126  	volatile u_int sc_rbavail;
127 	u_char *sc_rbuf,
128 	       *sc_ebuf;
130  	u_char *sc_tba;
131  	u_int sc_tbc,
132 	      sc_heldtbc;
134 	volatile u_char sc_rx_flags,
140 			sc_tx_busy,
141 			sc_tx_done,
142 			sc_tx_stopped,
143 			sc_st_check,
144 			sc_rx_ready;
148 	uint16_t sc_ucon;		/* control register */
149 	uint16_t sc_ubrdiv;		/* baudrate register */
150 	uint8_t  sc_heldchange;		/* register changes are pended */
151 	uint8_t  sc_ulcon;		/* line control */
152 	uint8_t  sc_umcon;		/* modem control */
155 	uint8_t  sc_msts;		/* modem status */
160 	uint8_t sc_msr_dcd;		/* DCD or 0 */
161 	uint8_t sc_mcr_dtr;		/* DTR or 0 or DTR|RTS*/
162 	uint8_t sc_mcr_rts;		/* RTS or DTR in sc_umcon */
163 	uint8_t sc_msr_cts;		/* CTS or DCD in sc_msts */
165 	uint8_t sc_msr_mask;		/* sc_msr_cts|sc_msr_dcd */
166 	uint8_t sc_mcr_active;
167 	uint8_t sc_msr_delta;
169 	uint8_t sc_rx_irqno, sc_tx_irqno;
193 	int	(*sc_read_modem_status)( struct sscom_softc * );  argument
194 	void	(*sc_set_modem_control)( struct sscom_softc * );  argument
195 	void	(*sc_change_txrx_interrupts)(struct sscom_softc *, bool, u_int);  argument