55 #define ZS_WSYNC(channel)	do { } while (0)  argument
113 static unsigned char read_zsreg(struct zilog_channel *channel,  in read_zsreg()  argument
118 	writeb(reg, &channel->control);  in read_zsreg()
120 	retval = readb(&channel->control);  in read_zsreg()
126 static void write_zsreg(struct zilog_channel *channel,  in write_zsreg()  argument
129 	writeb(reg, &channel->control);  in write_zsreg()
131 	writeb(value, &channel->control);  in write_zsreg()
135 static void ip22zilog_clear_fifo(struct zilog_channel *channel)  in ip22zilog_clear_fifo()  argument
142 		regval = readb(&channel->control);  in ip22zilog_clear_fifo()
147 		regval = read_zsreg(channel, R1);  in ip22zilog_clear_fifo()
148 		readb(&channel->data);  in ip22zilog_clear_fifo()
152 			writeb(ERR_RES, &channel->control);  in ip22zilog_clear_fifo()
154 			ZS_WSYNC(channel);  in ip22zilog_clear_fifo()
162 static void __load_zsregs(struct zilog_channel *channel, unsigned char *regs)  in __load_zsregs()  argument
168 		unsigned char stat = read_zsreg(channel, R1);  in __load_zsregs()
174 	writeb(ERR_RES, &channel->control);  in __load_zsregs()
176 	ZS_WSYNC(channel);  in __load_zsregs()
178 	ip22zilog_clear_fifo(channel);  in __load_zsregs()
181 	write_zsreg(channel, R1,  in __load_zsregs()
185 	write_zsreg(channel, R4, regs[R4]);  in __load_zsregs()
188 	write_zsreg(channel, R10, regs[R10]);  in __load_zsregs()
191 	write_zsreg(channel, R3, regs[R3] & ~RxENAB);  in __load_zsregs()
192 	write_zsreg(channel, R5, regs[R5] & ~TxENAB);  in __load_zsregs()
195 	write_zsreg(channel, R6, regs[R6]);  in __load_zsregs()
196 	write_zsreg(channel, R7, regs[R7]);  in __load_zsregs()
204 	write_zsreg(channel, R14, regs[R14] & ~BRENAB);  in __load_zsregs()
207 	write_zsreg(channel, R11, regs[R11]);  in __load_zsregs()
210 	write_zsreg(channel, R12, regs[R12]);  in __load_zsregs()
211 	write_zsreg(channel, R13, regs[R13]);  in __load_zsregs()
214 	write_zsreg(channel, R14, regs[R14]);  in __load_zsregs()
217 	write_zsreg(channel, R15, regs[R15]);  in __load_zsregs()
220 	write_zsreg(channel, R0, RES_EXT_INT);  in __load_zsregs()
221 	write_zsreg(channel, R0, RES_EXT_INT);  in __load_zsregs()
224 	write_zsreg(channel, R3, regs[R3]);  in __load_zsregs()
225 	write_zsreg(channel, R5, regs[R5]);  in __load_zsregs()
228 	write_zsreg(channel, R1, regs[R1]);  in __load_zsregs()
238 				       struct zilog_channel *channel)  in ip22zilog_maybe_update_regs()  argument
244 			__load_zsregs(channel, up->curregs);  in ip22zilog_maybe_update_regs()
253 						  struct zilog_channel *channel)  in ip22zilog_receive_chars()  argument
260 		ch = readb(&channel->control);  in ip22zilog_receive_chars()
265 		r1 = read_zsreg(channel, R1);  in ip22zilog_receive_chars()
267 			writeb(ERR_RES, &channel->control);  in ip22zilog_receive_chars()
269 			ZS_WSYNC(channel);  in ip22zilog_receive_chars()
272 		ch = readb(&channel->data);  in ip22zilog_receive_chars()
318 				   struct zilog_channel *channel)  in ip22zilog_status_handle()  argument
322 	status = readb(&channel->control);  in ip22zilog_status_handle()
325 	writeb(RES_EXT_INT, &channel->control);  in ip22zilog_status_handle()
327 	ZS_WSYNC(channel);  in ip22zilog_status_handle()
360 				    struct zilog_channel *channel)  in ip22zilog_transmit_chars()  argument
365 		unsigned char status = readb(&channel->control);  in ip22zilog_transmit_chars()
383 		__load_zsregs(channel, up->curregs);  in ip22zilog_transmit_chars()
394 		writeb(up->port.x_char, &channel->data);  in ip22zilog_transmit_chars()
396 		ZS_WSYNC(channel);  in ip22zilog_transmit_chars()
412 	writeb(xmit->buf[xmit->tail], &channel->data);  in ip22zilog_transmit_chars()
414 	ZS_WSYNC(channel);  in ip22zilog_transmit_chars()
425 	writeb(RES_Tx_P, &channel->control);  in ip22zilog_transmit_chars()
427 	ZS_WSYNC(channel);  in ip22zilog_transmit_chars()
435 		struct zilog_channel *channel  in ip22zilog_interrupt()  local
441 		r3 = read_zsreg(channel, R3);  in ip22zilog_interrupt()
445 			writeb(RES_H_IUS, &channel->control);  in ip22zilog_interrupt()
447 			ZS_WSYNC(channel);  in ip22zilog_interrupt()
450 				push = ip22zilog_receive_chars(up, channel);  in ip22zilog_interrupt()
452 				ip22zilog_status_handle(up, channel);  in ip22zilog_interrupt()
454 				ip22zilog_transmit_chars(up, channel);  in ip22zilog_interrupt()
463 		channel = ZILOG_CHANNEL_FROM_PORT(&up->port);  in ip22zilog_interrupt()
468 			writeb(RES_H_IUS, &channel->control);  in ip22zilog_interrupt()
470 			ZS_WSYNC(channel);  in ip22zilog_interrupt()
473 				push = ip22zilog_receive_chars(up, channel);  in ip22zilog_interrupt()
475 				ip22zilog_status_handle(up, channel);  in ip22zilog_interrupt()
477 				ip22zilog_transmit_chars(up, channel);  in ip22zilog_interrupt()
495 	struct zilog_channel *channel;  in ip22zilog_read_channel_status()  local
498 	channel = ZILOG_CHANNEL_FROM_PORT(port);  in ip22zilog_read_channel_status()
499 	status = readb(&channel->control);  in ip22zilog_read_channel_status()
550 	struct zilog_channel *channel = ZILOG_CHANNEL_FROM_PORT(port);  in ip22zilog_set_mctrl()  local
567 	write_zsreg(channel, R5, up->curregs[R5]);  in ip22zilog_set_mctrl()
584 	struct zilog_channel *channel = ZILOG_CHANNEL_FROM_PORT(port);  in ip22zilog_start_tx()  local
590 	status = readb(&channel->control);  in ip22zilog_start_tx()
601 		writeb(port->x_char, &channel->data);  in ip22zilog_start_tx()
603 		ZS_WSYNC(channel);  in ip22zilog_start_tx()
612 		writeb(xmit->buf[xmit->tail], &channel->data);  in ip22zilog_start_tx()
614 		ZS_WSYNC(channel);  in ip22zilog_start_tx()
628 	struct zilog_channel *channel;  in ip22zilog_stop_rx()  local
633 	channel = ZILOG_CHANNEL_FROM_PORT(port);  in ip22zilog_stop_rx()
637 	ip22zilog_maybe_update_regs(up, channel);  in ip22zilog_stop_rx()
645 	struct zilog_channel *channel = ZILOG_CHANNEL_FROM_PORT(port);  in ip22zilog_enable_ms()  local
653 		write_zsreg(channel, R15, up->curregs[R15]);  in ip22zilog_enable_ms()
662 	struct zilog_channel *channel = ZILOG_CHANNEL_FROM_PORT(port);  in ip22zilog_break_ctl()  local
680 		write_zsreg(channel, R5, up->curregs[R5]);  in ip22zilog_break_ctl()
688 	struct zilog_channel *channel;  in __ip22zilog_reset()  local
695 	channel = ZILOG_CHANNEL_FROM_PORT(&up->port);  in __ip22zilog_reset()
697 		unsigned char stat = read_zsreg(channel, R1);  in __ip22zilog_reset()
705 		channel = ZILOG_CHANNEL_FROM_PORT(&up->port);  in __ip22zilog_reset()
707 	write_zsreg(channel, R9, FHWRES);  in __ip22zilog_reset()
709 	(void) read_zsreg(channel, R0);  in __ip22zilog_reset()
717 	struct zilog_channel *channel;  in __ip22zilog_startup()  local
719 	channel = ZILOG_CHANNEL_FROM_PORT(&up->port);  in __ip22zilog_startup()
723 	__load_zsregs(channel, up->curregs);  in __ip22zilog_startup()
725 	write_zsreg(channel, R9, up->curregs[R9]);  in __ip22zilog_startup()
726 	up->prev_status = readb(&channel->control);  in __ip22zilog_startup()
733 	ip22zilog_maybe_update_regs(up, channel);  in __ip22zilog_startup()
778 	struct zilog_channel *channel;  in ip22zilog_shutdown()  local
786 	channel = ZILOG_CHANNEL_FROM_PORT(port);  in ip22zilog_shutdown()
795 	ip22zilog_maybe_update_regs(up, channel);  in ip22zilog_shutdown()
999 	struct zilog_channel *channel = ZILOG_CHANNEL_FROM_PORT(port);  in ip22zilog_put_char()  local
1006 		unsigned char val = readb(&channel->control);  in ip22zilog_put_char()
1014 	writeb(ch, &channel->data);  in ip22zilog_put_char()
1016 	ZS_WSYNC(channel);  in ip22zilog_put_char()
1085 	int channel, chip;  in ip22zilog_prepare()  local
1090 	for (channel = 0; channel < NUM_CHANNELS; channel++)  in ip22zilog_prepare()
1091 		spin_lock_init(&ip22zilog_port_table[channel].port.lock);  in ip22zilog_prepare()
1095 	for (channel = NUM_CHANNELS - 1 ; channel > 0; channel--)  in ip22zilog_prepare()
1096 		up[channel].next = &up[channel - 1];  in ip22zilog_prepare()
1097 	up[channel].next = NULL;  in ip22zilog_prepare()
1135 	for (channel = 0; channel < NUM_CHANNELS; channel++) {  in ip22zilog_prepare()
1136 		struct uart_ip22zilog_port *up = &ip22zilog_port_table[channel];  in ip22zilog_prepare()