52 	struct ipoctal_channel		channel[NR_CHANNELS];  member
61 	return container_of(chan, struct ipoctal, channel[index]);  in chan_to_ipoctal()
64 static void ipoctal_reset_channel(struct ipoctal_channel *channel)  in ipoctal_reset_channel()  argument
66 	iowrite8(CR_DISABLE_RX | CR_DISABLE_TX, &channel->regs->w.cr);  in ipoctal_reset_channel()
67 	channel->rx_enable = 0;  in ipoctal_reset_channel()
68 	iowrite8(CR_CMD_RESET_RX, &channel->regs->w.cr);  in ipoctal_reset_channel()
69 	iowrite8(CR_CMD_RESET_TX, &channel->regs->w.cr);  in ipoctal_reset_channel()
70 	iowrite8(CR_CMD_RESET_ERR_STATUS, &channel->regs->w.cr);  in ipoctal_reset_channel()
71 	iowrite8(CR_CMD_RESET_MR, &channel->regs->w.cr);  in ipoctal_reset_channel()
76 	struct ipoctal_channel *channel;  in ipoctal_port_activate()  local
78 	channel = dev_get_drvdata(tty->dev);  in ipoctal_port_activate()
84 	iowrite8(CR_ENABLE_RX, &channel->regs->w.cr);  in ipoctal_port_activate()
85 	channel->rx_enable = 1;  in ipoctal_port_activate()
91 	struct ipoctal_channel *channel = dev_get_drvdata(tty->dev);  in ipoctal_open()  local
92 	struct ipoctal *ipoctal = chan_to_ipoctal(channel, tty->index);  in ipoctal_open()
95 	tty->driver_data = channel;  in ipoctal_open()
100 	err = tty_port_open(&channel->tty_port, tty, file);  in ipoctal_open()
117 static void ipoctal_free_channel(struct ipoctal_channel *channel)  in ipoctal_free_channel()  argument
119 	ipoctal_reset_stats(&channel->stats);  in ipoctal_free_channel()
120 	channel->pointer_read = 0;  in ipoctal_free_channel()
121 	channel->pointer_write = 0;  in ipoctal_free_channel()
122 	channel->nb_bytes = 0;  in ipoctal_free_channel()
127 	struct ipoctal_channel *channel = tty->driver_data;  in ipoctal_close()  local
129 	tty_port_close(&channel->tty_port, tty, filp);  in ipoctal_close()
130 	ipoctal_free_channel(channel);  in ipoctal_close()
136 	struct ipoctal_channel *channel = tty->driver_data;  in ipoctal_get_icount()  local
142 	icount->rx = channel->stats.rx;  in ipoctal_get_icount()
143 	icount->tx = channel->stats.tx;  in ipoctal_get_icount()
144 	icount->frame = channel->stats.framing_err;  in ipoctal_get_icount()
145 	icount->parity = channel->stats.parity_err;  in ipoctal_get_icount()
146 	icount->brk = channel->stats.rcv_break;  in ipoctal_get_icount()
150 static void ipoctal_irq_rx(struct ipoctal_channel *channel, u8 sr)  in ipoctal_irq_rx()  argument
152 	struct tty_port *port = &channel->tty_port;  in ipoctal_irq_rx()
158 		value = ioread8(&channel->regs->r.rhr);  in ipoctal_irq_rx()
162 			iowrite8(CR_CMD_RESET_ERR_STATUS, &channel->regs->w.cr);  in ipoctal_irq_rx()
165 				channel->stats.overrun_err++;  in ipoctal_irq_rx()
170 				channel->stats.parity_err++;  in ipoctal_irq_rx()
174 				channel->stats.framing_err++;  in ipoctal_irq_rx()
178 				channel->stats.rcv_break++;  in ipoctal_irq_rx()
188 		isr = ioread8(&channel->block_regs->r.isr);  in ipoctal_irq_rx()
189 		sr = ioread8(&channel->regs->r.sr);  in ipoctal_irq_rx()
190 	} while (isr & channel->isr_rx_rdy_mask);  in ipoctal_irq_rx()
195 static void ipoctal_irq_tx(struct ipoctal_channel *channel)  in ipoctal_irq_tx()  argument
198 	unsigned int *pointer_write = &channel->pointer_write;  in ipoctal_irq_tx()
200 	if (channel->nb_bytes == 0)  in ipoctal_irq_tx()
203 	spin_lock(&channel->lock);  in ipoctal_irq_tx()
204 	value = channel->tty_port.xmit_buf[*pointer_write];  in ipoctal_irq_tx()
205 	iowrite8(value, &channel->regs->w.thr);  in ipoctal_irq_tx()
206 	channel->stats.tx++;  in ipoctal_irq_tx()
209 	channel->nb_bytes--;  in ipoctal_irq_tx()
210 	spin_unlock(&channel->lock);  in ipoctal_irq_tx()
213 static void ipoctal_irq_channel(struct ipoctal_channel *channel)  in ipoctal_irq_channel()  argument
219 	isr = ioread8(&channel->block_regs->r.isr);  in ipoctal_irq_channel()
220 	sr = ioread8(&channel->regs->r.sr);  in ipoctal_irq_channel()
223 		iowrite8(CR_CMD_RESET_BREAK_CHANGE, &channel->regs->w.cr);  in ipoctal_irq_channel()
225 	if ((sr & SR_TX_EMPTY) && (channel->nb_bytes == 0)) {  in ipoctal_irq_channel()
226 		iowrite8(CR_DISABLE_TX, &channel->regs->w.cr);  in ipoctal_irq_channel()
229 		if (channel->board_id == IPACK1_DEVICE_ID_SBS_OCTAL_485) {  in ipoctal_irq_channel()
230 			iowrite8(CR_CMD_NEGATE_RTSN, &channel->regs->w.cr);  in ipoctal_irq_channel()
231 			iowrite8(CR_ENABLE_RX, &channel->regs->w.cr);  in ipoctal_irq_channel()
232 			channel->rx_enable = 1;  in ipoctal_irq_channel()
237 	if ((isr & channel->isr_rx_rdy_mask) && (sr & SR_RX_READY))  in ipoctal_irq_channel()
238 		ipoctal_irq_rx(channel, sr);  in ipoctal_irq_channel()
241 	if ((isr & channel->isr_tx_rdy_mask) && (sr & SR_TX_READY))  in ipoctal_irq_channel()
242 		ipoctal_irq_tx(channel);  in ipoctal_irq_channel()
256 		ipoctal_irq_channel(&ipoctal->channel[i]);  in ipoctal_irq_handler()
273 	struct ipoctal_channel *channel;  in ipoctal_inst_slot()  local
321 		struct ipoctal_channel *channel = &ipoctal->channel[i];  in ipoctal_inst_slot()  local
322 		channel->regs = chan_regs + i;  in ipoctal_inst_slot()
323 		channel->block_regs = block_regs + (i >> 1);  in ipoctal_inst_slot()
324 		channel->board_id = ipoctal->board_id;  in ipoctal_inst_slot()
326 			channel->isr_tx_rdy_mask = ISR_TxRDY_B;  in ipoctal_inst_slot()
327 			channel->isr_rx_rdy_mask = ISR_RxRDY_FFULL_B;  in ipoctal_inst_slot()
329 			channel->isr_tx_rdy_mask = ISR_TxRDY_A;  in ipoctal_inst_slot()
330 			channel->isr_rx_rdy_mask = ISR_RxRDY_FFULL_A;  in ipoctal_inst_slot()
333 		ipoctal_reset_channel(channel);  in ipoctal_inst_slot()
335 			 &channel->regs->w.mr); /* mr1 */  in ipoctal_inst_slot()
336 		iowrite8(0, &channel->regs->w.mr); /* mr2 */  in ipoctal_inst_slot()
337 		iowrite8(TX_CLK_9600  | RX_CLK_9600, &channel->regs->w.csr);  in ipoctal_inst_slot()
390 		channel = &ipoctal->channel[i];  in ipoctal_inst_slot()
391 		tty_port_init(&channel->tty_port);  in ipoctal_inst_slot()
392 		tty_port_alloc_xmit_buf(&channel->tty_port);  in ipoctal_inst_slot()
393 		channel->tty_port.ops = &ipoctal_tty_port_ops;  in ipoctal_inst_slot()
395 		ipoctal_reset_stats(&channel->stats);  in ipoctal_inst_slot()
396 		channel->nb_bytes = 0;  in ipoctal_inst_slot()
397 		spin_lock_init(&channel->lock);  in ipoctal_inst_slot()
398 		channel->pointer_read = 0;  in ipoctal_inst_slot()
399 		channel->pointer_write = 0;  in ipoctal_inst_slot()
400 		tty_dev = tty_port_register_device(&channel->tty_port, tty, i, NULL);  in ipoctal_inst_slot()
403 			tty_port_destroy(&channel->tty_port);  in ipoctal_inst_slot()
406 		dev_set_drvdata(tty_dev, channel);  in ipoctal_inst_slot()
420 static inline int ipoctal_copy_write_buffer(struct ipoctal_channel *channel,  in ipoctal_copy_write_buffer()  argument
426 	unsigned int *pointer_read = &channel->pointer_read;  in ipoctal_copy_write_buffer()
430 		if (i <= (PAGE_SIZE - channel->nb_bytes)) {  in ipoctal_copy_write_buffer()
431 			spin_lock_irqsave(&channel->lock, flags);  in ipoctal_copy_write_buffer()
432 			channel->tty_port.xmit_buf[*pointer_read] = buf[i];  in ipoctal_copy_write_buffer()
434 			channel->nb_bytes++;  in ipoctal_copy_write_buffer()
435 			spin_unlock_irqrestore(&channel->lock, flags);  in ipoctal_copy_write_buffer()
446 	struct ipoctal_channel *channel = tty->driver_data;  in ipoctal_write_tty()  local
449 	char_copied = ipoctal_copy_write_buffer(channel, buf, count);  in ipoctal_write_tty()
452 	if (channel->board_id == IPACK1_DEVICE_ID_SBS_OCTAL_485) {  in ipoctal_write_tty()
453 		iowrite8(CR_DISABLE_RX, &channel->regs->w.cr);  in ipoctal_write_tty()
454 		channel->rx_enable = 0;  in ipoctal_write_tty()
455 		iowrite8(CR_CMD_ASSERT_RTSN, &channel->regs->w.cr);  in ipoctal_write_tty()
462 	iowrite8(CR_ENABLE_TX, &channel->regs->w.cr);  in ipoctal_write_tty()
468 	struct ipoctal_channel *channel = tty->driver_data;  in ipoctal_write_room()  local
470 	return PAGE_SIZE - channel->nb_bytes;  in ipoctal_write_room()
475 	struct ipoctal_channel *channel = tty->driver_data;  in ipoctal_chars_in_buffer()  local
477 	return channel->nb_bytes;  in ipoctal_chars_in_buffer()
487 	struct ipoctal_channel *channel = tty->driver_data;  in ipoctal_set_termios()  local
493 	ipoctal_reset_channel(channel);  in ipoctal_set_termios()
530 	switch (channel->board_id) {  in ipoctal_set_termios()
606 	iowrite8(mr1, &channel->regs->w.mr);  in ipoctal_set_termios()
607 	iowrite8(mr2, &channel->regs->w.mr);  in ipoctal_set_termios()
608 	iowrite8(csr, &channel->regs->w.csr);  in ipoctal_set_termios()
611 	if (channel->rx_enable)  in ipoctal_set_termios()
612 		iowrite8(CR_ENABLE_RX, &channel->regs->w.cr);  in ipoctal_set_termios()
618 	struct ipoctal_channel *channel = tty->driver_data;  in ipoctal_hangup()  local
620 	if (channel == NULL)  in ipoctal_hangup()
623 	spin_lock_irqsave(&channel->lock, flags);  in ipoctal_hangup()
624 	channel->nb_bytes = 0;  in ipoctal_hangup()
625 	channel->pointer_read = 0;  in ipoctal_hangup()
626 	channel->pointer_write = 0;  in ipoctal_hangup()
627 	spin_unlock_irqrestore(&channel->lock, flags);  in ipoctal_hangup()
629 	tty_port_hangup(&channel->tty_port);  in ipoctal_hangup()
631 	ipoctal_reset_channel(channel);  in ipoctal_hangup()
633 	clear_bit(ASYNCB_INITIALIZED, &channel->tty_port.flags);  in ipoctal_hangup()
634 	wake_up_interruptible(&channel->tty_port.open_wait);  in ipoctal_hangup()
639 	struct ipoctal_channel *channel = tty->driver_data;  in ipoctal_shutdown()  local
641 	if (channel == NULL)  in ipoctal_shutdown()
644 	ipoctal_reset_channel(channel);  in ipoctal_shutdown()
645 	clear_bit(ASYNCB_INITIALIZED, &channel->tty_port.flags);  in ipoctal_shutdown()
650 	struct ipoctal_channel *channel = tty->driver_data;  in ipoctal_cleanup()  local
651 	struct ipoctal *ipoctal = chan_to_ipoctal(channel, tty->index);  in ipoctal_cleanup()
700 		struct ipoctal_channel *channel = &ipoctal->channel[i];  in __ipoctal_remove()  local
702 		tty_port_free_xmit_buf(&channel->tty_port);  in __ipoctal_remove()
703 		tty_port_destroy(&channel->tty_port);  in __ipoctal_remove()