Lines Matching +full:channel +full:-
1 // SPDX-License-Identifier: GPL-2.0-only
5 * driver for the GE IP-OCTAL boards
7 * Copyright (C) 2009-2012 CERN (www.cern.ch)
50 struct ipoctal_channel channel[NR_CHANNELS]; member
59 return container_of(chan, struct ipoctal, channel[index]); in chan_to_ipoctal()
62 static void ipoctal_reset_channel(struct ipoctal_channel *channel) in ipoctal_reset_channel() argument
64 iowrite8(CR_DISABLE_RX | CR_DISABLE_TX, &channel->regs->w.cr); in ipoctal_reset_channel()
65 channel->rx_enable = 0; in ipoctal_reset_channel()
66 iowrite8(CR_CMD_RESET_RX, &channel->regs->w.cr); in ipoctal_reset_channel()
67 iowrite8(CR_CMD_RESET_TX, &channel->regs->w.cr); in ipoctal_reset_channel()
68 iowrite8(CR_CMD_RESET_ERR_STATUS, &channel->regs->w.cr); in ipoctal_reset_channel()
69 iowrite8(CR_CMD_RESET_MR, &channel->regs->w.cr); in ipoctal_reset_channel()
74 struct ipoctal_channel *channel; in ipoctal_port_activate() local
76 channel = dev_get_drvdata(tty->dev); in ipoctal_port_activate()
82 iowrite8(CR_ENABLE_RX, &channel->regs->w.cr); in ipoctal_port_activate()
83 channel->rx_enable = 1; in ipoctal_port_activate()
89 struct ipoctal_channel *channel = dev_get_drvdata(tty->dev); in ipoctal_install() local
90 struct ipoctal *ipoctal = chan_to_ipoctal(channel, tty->index); in ipoctal_install()
93 if (!ipack_get_carrier(ipoctal->dev)) in ipoctal_install()
94 return -EBUSY; in ipoctal_install()
100 tty->driver_data = channel; in ipoctal_install()
105 ipack_put_carrier(ipoctal->dev); in ipoctal_install()
112 struct ipoctal_channel *channel = tty->driver_data; in ipoctal_open() local
114 return tty_port_open(&channel->tty_port, tty, file); in ipoctal_open()
119 stats->tx = 0; in ipoctal_reset_stats()
120 stats->rx = 0; in ipoctal_reset_stats()
121 stats->rcv_break = 0; in ipoctal_reset_stats()
122 stats->framing_err = 0; in ipoctal_reset_stats()
123 stats->overrun_err = 0; in ipoctal_reset_stats()
124 stats->parity_err = 0; in ipoctal_reset_stats()
127 static void ipoctal_free_channel(struct ipoctal_channel *channel) in ipoctal_free_channel() argument
129 ipoctal_reset_stats(&channel->stats); in ipoctal_free_channel()
130 channel->pointer_read = 0; in ipoctal_free_channel()
131 channel->pointer_write = 0; in ipoctal_free_channel()
132 channel->nb_bytes = 0; in ipoctal_free_channel()
137 struct ipoctal_channel *channel = tty->driver_data; in ipoctal_close() local
139 tty_port_close(&channel->tty_port, tty, filp); in ipoctal_close()
140 ipoctal_free_channel(channel); in ipoctal_close()
146 struct ipoctal_channel *channel = tty->driver_data; in ipoctal_get_icount() local
148 icount->cts = 0; in ipoctal_get_icount()
149 icount->dsr = 0; in ipoctal_get_icount()
150 icount->rng = 0; in ipoctal_get_icount()
151 icount->dcd = 0; in ipoctal_get_icount()
152 icount->rx = channel->stats.rx; in ipoctal_get_icount()
153 icount->tx = channel->stats.tx; in ipoctal_get_icount()
154 icount->frame = channel->stats.framing_err; in ipoctal_get_icount()
155 icount->parity = channel->stats.parity_err; in ipoctal_get_icount()
156 icount->brk = channel->stats.rcv_break; in ipoctal_get_icount()
160 static void ipoctal_irq_rx(struct ipoctal_channel *channel, u8 sr) in ipoctal_irq_rx() argument
162 struct tty_port *port = &channel->tty_port; in ipoctal_irq_rx()
168 value = ioread8(&channel->regs->r.rhr); in ipoctal_irq_rx()
172 iowrite8(CR_CMD_RESET_ERR_STATUS, &channel->regs->w.cr); in ipoctal_irq_rx()
175 channel->stats.overrun_err++; in ipoctal_irq_rx()
180 channel->stats.parity_err++; in ipoctal_irq_rx()
184 channel->stats.framing_err++; in ipoctal_irq_rx()
188 channel->stats.rcv_break++; in ipoctal_irq_rx()
195 * If there are more, the isr register for this channel in ipoctal_irq_rx()
198 isr = ioread8(&channel->block_regs->r.isr); in ipoctal_irq_rx()
199 sr = ioread8(&channel->regs->r.sr); in ipoctal_irq_rx()
200 } while (isr & channel->isr_rx_rdy_mask); in ipoctal_irq_rx()
205 static void ipoctal_irq_tx(struct ipoctal_channel *channel) in ipoctal_irq_tx() argument
208 unsigned int *pointer_write = &channel->pointer_write; in ipoctal_irq_tx()
210 if (channel->nb_bytes == 0) in ipoctal_irq_tx()
213 spin_lock(&channel->lock); in ipoctal_irq_tx()
214 value = channel->tty_port.xmit_buf[*pointer_write]; in ipoctal_irq_tx()
215 iowrite8(value, &channel->regs->w.thr); in ipoctal_irq_tx()
216 channel->stats.tx++; in ipoctal_irq_tx()
219 channel->nb_bytes--; in ipoctal_irq_tx()
220 spin_unlock(&channel->lock); in ipoctal_irq_tx()
223 static void ipoctal_irq_channel(struct ipoctal_channel *channel) in ipoctal_irq_channel() argument
229 isr = ioread8(&channel->block_regs->r.isr); in ipoctal_irq_channel()
230 sr = ioread8(&channel->regs->r.sr); in ipoctal_irq_channel()
233 iowrite8(CR_CMD_RESET_BREAK_CHANGE, &channel->regs->w.cr); in ipoctal_irq_channel()
235 if ((sr & SR_TX_EMPTY) && (channel->nb_bytes == 0)) { in ipoctal_irq_channel()
236 iowrite8(CR_DISABLE_TX, &channel->regs->w.cr); in ipoctal_irq_channel()
237 /* In case of RS-485, change from TX to RX when finishing TX. in ipoctal_irq_channel()
238 * Half-duplex. */ in ipoctal_irq_channel()
239 if (channel->board_id == IPACK1_DEVICE_ID_SBS_OCTAL_485) { in ipoctal_irq_channel()
240 iowrite8(CR_CMD_NEGATE_RTSN, &channel->regs->w.cr); in ipoctal_irq_channel()
241 iowrite8(CR_ENABLE_RX, &channel->regs->w.cr); in ipoctal_irq_channel()
242 channel->rx_enable = 1; in ipoctal_irq_channel()
247 if ((isr & channel->isr_rx_rdy_mask) && (sr & SR_RX_READY)) in ipoctal_irq_channel()
248 ipoctal_irq_rx(channel, sr); in ipoctal_irq_channel()
251 if ((isr & channel->isr_tx_rdy_mask) && (sr & SR_TX_READY)) in ipoctal_irq_channel()
252 ipoctal_irq_tx(channel); in ipoctal_irq_channel()
261 readw(ipoctal->int_space + ACK_INT_REQ0); in ipoctal_irq_handler()
262 readw(ipoctal->int_space + ACK_INT_REQ1); in ipoctal_irq_handler()
266 ipoctal_irq_channel(&ipoctal->channel[i]); in ipoctal_irq_handler()
282 struct ipoctal_channel *channel; in ipoctal_inst_slot() local
288 ipoctal->board_id = ipoctal->dev->id_device; in ipoctal_inst_slot()
290 region = &ipoctal->dev->region[IPACK_IO_SPACE]; in ipoctal_inst_slot()
291 addr = devm_ioremap(&ipoctal->dev->dev, in ipoctal_inst_slot()
292 region->start, region->size); in ipoctal_inst_slot()
294 dev_err(&ipoctal->dev->dev, in ipoctal_inst_slot()
297 return -EADDRNOTAVAIL; in ipoctal_inst_slot()
305 region = &ipoctal->dev->region[IPACK_INT_SPACE]; in ipoctal_inst_slot()
306 ipoctal->int_space = in ipoctal_inst_slot()
307 devm_ioremap(&ipoctal->dev->dev, in ipoctal_inst_slot()
308 region->start, region->size); in ipoctal_inst_slot()
309 if (!ipoctal->int_space) { in ipoctal_inst_slot()
310 dev_err(&ipoctal->dev->dev, in ipoctal_inst_slot()
313 return -EADDRNOTAVAIL; in ipoctal_inst_slot()
316 region = &ipoctal->dev->region[IPACK_MEM8_SPACE]; in ipoctal_inst_slot()
317 ipoctal->mem8_space = in ipoctal_inst_slot()
318 devm_ioremap(&ipoctal->dev->dev, in ipoctal_inst_slot()
319 region->start, 0x8000); in ipoctal_inst_slot()
320 if (!ipoctal->mem8_space) { in ipoctal_inst_slot()
321 dev_err(&ipoctal->dev->dev, in ipoctal_inst_slot()
324 return -EADDRNOTAVAIL; in ipoctal_inst_slot()
330 struct ipoctal_channel *channel = &ipoctal->channel[i]; in ipoctal_inst_slot() local
331 channel->regs = chan_regs + i; in ipoctal_inst_slot()
332 channel->block_regs = block_regs + (i >> 1); in ipoctal_inst_slot()
333 channel->board_id = ipoctal->board_id; in ipoctal_inst_slot()
335 channel->isr_tx_rdy_mask = ISR_TxRDY_B; in ipoctal_inst_slot()
336 channel->isr_rx_rdy_mask = ISR_RxRDY_FFULL_B; in ipoctal_inst_slot()
338 channel->isr_tx_rdy_mask = ISR_TxRDY_A; in ipoctal_inst_slot()
339 channel->isr_rx_rdy_mask = ISR_RxRDY_FFULL_A; in ipoctal_inst_slot()
342 ipoctal_reset_channel(channel); in ipoctal_inst_slot()
344 &channel->regs->w.mr); /* mr1 */ in ipoctal_inst_slot()
345 iowrite8(0, &channel->regs->w.mr); /* mr2 */ in ipoctal_inst_slot()
346 iowrite8(TX_CLK_9600 | RX_CLK_9600, &channel->regs->w.csr); in ipoctal_inst_slot()
359 iowrite8(1, ipoctal->mem8_space + 1); in ipoctal_inst_slot()
363 /* Each IP-OCTAL channel is a TTY port */ in ipoctal_inst_slot()
367 return -ENOMEM; in ipoctal_inst_slot()
370 tty->owner = THIS_MODULE; in ipoctal_inst_slot()
371 tty->driver_name = KBUILD_MODNAME; in ipoctal_inst_slot()
372 tty->name = kasprintf(GFP_KERNEL, KBUILD_MODNAME ".%d.%d.", bus_nr, slot); in ipoctal_inst_slot()
373 if (!tty->name) { in ipoctal_inst_slot()
374 res = -ENOMEM; in ipoctal_inst_slot()
377 tty->major = 0; in ipoctal_inst_slot()
379 tty->minor_start = 0; in ipoctal_inst_slot()
380 tty->type = TTY_DRIVER_TYPE_SERIAL; in ipoctal_inst_slot()
381 tty->subtype = SERIAL_TYPE_NORMAL; in ipoctal_inst_slot()
382 tty->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; in ipoctal_inst_slot()
383 tty->init_termios = tty_std_termios; in ipoctal_inst_slot()
384 tty->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; in ipoctal_inst_slot()
385 tty->init_termios.c_ispeed = 9600; in ipoctal_inst_slot()
386 tty->init_termios.c_ospeed = 9600; in ipoctal_inst_slot()
391 dev_err(&ipoctal->dev->dev, "Can't register tty driver.\n"); in ipoctal_inst_slot()
396 ipoctal->tty_drv = tty; in ipoctal_inst_slot()
401 channel = &ipoctal->channel[i]; in ipoctal_inst_slot()
402 tty_port_init(&channel->tty_port); in ipoctal_inst_slot()
403 res = tty_port_alloc_xmit_buf(&channel->tty_port); in ipoctal_inst_slot()
406 channel->tty_port.ops = &ipoctal_tty_port_ops; in ipoctal_inst_slot()
408 ipoctal_reset_stats(&channel->stats); in ipoctal_inst_slot()
409 channel->nb_bytes = 0; in ipoctal_inst_slot()
410 spin_lock_init(&channel->lock); in ipoctal_inst_slot()
411 channel->pointer_read = 0; in ipoctal_inst_slot()
412 channel->pointer_write = 0; in ipoctal_inst_slot()
413 tty_dev = tty_port_register_device_attr(&channel->tty_port, tty, in ipoctal_inst_slot()
414 i, NULL, channel, NULL); in ipoctal_inst_slot()
416 dev_err(&ipoctal->dev->dev, "Failed to register tty device.\n"); in ipoctal_inst_slot()
417 tty_port_free_xmit_buf(&channel->tty_port); in ipoctal_inst_slot()
418 tty_port_destroy(&channel->tty_port); in ipoctal_inst_slot()
421 channel->tty_registered = true; in ipoctal_inst_slot()
425 * IP-OCTAL has different addresses to copy its IRQ vector. in ipoctal_inst_slot()
429 ipoctal->dev->bus->ops->request_irq(ipoctal->dev, in ipoctal_inst_slot()
435 kfree(tty->name); in ipoctal_inst_slot()
442 static inline int ipoctal_copy_write_buffer(struct ipoctal_channel *channel, in ipoctal_copy_write_buffer() argument
448 unsigned int *pointer_read = &channel->pointer_read; in ipoctal_copy_write_buffer()
452 if (i <= (PAGE_SIZE - channel->nb_bytes)) { in ipoctal_copy_write_buffer()
453 spin_lock_irqsave(&channel->lock, flags); in ipoctal_copy_write_buffer()
454 channel->tty_port.xmit_buf[*pointer_read] = buf[i]; in ipoctal_copy_write_buffer()
456 channel->nb_bytes++; in ipoctal_copy_write_buffer()
457 spin_unlock_irqrestore(&channel->lock, flags); in ipoctal_copy_write_buffer()
468 struct ipoctal_channel *channel = tty->driver_data; in ipoctal_write_tty() local
471 char_copied = ipoctal_copy_write_buffer(channel, buf, count); in ipoctal_write_tty()
473 /* As the IP-OCTAL 485 only supports half duplex, do it manually */ in ipoctal_write_tty()
474 if (channel->board_id == IPACK1_DEVICE_ID_SBS_OCTAL_485) { in ipoctal_write_tty()
475 iowrite8(CR_DISABLE_RX, &channel->regs->w.cr); in ipoctal_write_tty()
476 channel->rx_enable = 0; in ipoctal_write_tty()
477 iowrite8(CR_CMD_ASSERT_RTSN, &channel->regs->w.cr); in ipoctal_write_tty()
484 iowrite8(CR_ENABLE_TX, &channel->regs->w.cr); in ipoctal_write_tty()
490 struct ipoctal_channel *channel = tty->driver_data; in ipoctal_write_room() local
492 return PAGE_SIZE - channel->nb_bytes; in ipoctal_write_room()
497 struct ipoctal_channel *channel = tty->driver_data; in ipoctal_chars_in_buffer() local
499 return channel->nb_bytes; in ipoctal_chars_in_buffer()
509 struct ipoctal_channel *channel = tty->driver_data; in ipoctal_set_termios() local
512 cflag = tty->termios.c_cflag; in ipoctal_set_termios()
515 ipoctal_reset_channel(channel); in ipoctal_set_termios()
529 tty->termios.c_cflag = (cflag & ~CSIZE) | CS8; in ipoctal_set_termios()
543 tty->termios.c_cflag &= ~CMSPAR; in ipoctal_set_termios()
552 switch (channel->board_id) { in ipoctal_set_termios()
576 tty_termios_encode_baud_rate(&tty->termios, baud, baud); in ipoctal_set_termios()
620 tty_termios_encode_baud_rate(&tty->termios, 38400, 38400); in ipoctal_set_termios()
628 iowrite8(mr1, &channel->regs->w.mr); in ipoctal_set_termios()
629 iowrite8(mr2, &channel->regs->w.mr); in ipoctal_set_termios()
630 iowrite8(csr, &channel->regs->w.csr); in ipoctal_set_termios()
633 if (channel->rx_enable) in ipoctal_set_termios()
634 iowrite8(CR_ENABLE_RX, &channel->regs->w.cr); in ipoctal_set_termios()
640 struct ipoctal_channel *channel = tty->driver_data; in ipoctal_hangup() local
642 if (channel == NULL) in ipoctal_hangup()
645 spin_lock_irqsave(&channel->lock, flags); in ipoctal_hangup()
646 channel->nb_bytes = 0; in ipoctal_hangup()
647 channel->pointer_read = 0; in ipoctal_hangup()
648 channel->pointer_write = 0; in ipoctal_hangup()
649 spin_unlock_irqrestore(&channel->lock, flags); in ipoctal_hangup()
651 tty_port_hangup(&channel->tty_port); in ipoctal_hangup()
653 ipoctal_reset_channel(channel); in ipoctal_hangup()
654 tty_port_set_initialized(&channel->tty_port, 0); in ipoctal_hangup()
655 wake_up_interruptible(&channel->tty_port.open_wait); in ipoctal_hangup()
660 struct ipoctal_channel *channel = tty->driver_data; in ipoctal_shutdown() local
662 if (channel == NULL) in ipoctal_shutdown()
665 ipoctal_reset_channel(channel); in ipoctal_shutdown()
666 tty_port_set_initialized(&channel->tty_port, 0); in ipoctal_shutdown()
671 struct ipoctal_channel *channel = tty->driver_data; in ipoctal_cleanup() local
672 struct ipoctal *ipoctal = chan_to_ipoctal(channel, tty->index); in ipoctal_cleanup()
675 ipack_put_carrier(ipoctal->dev); in ipoctal_cleanup()
700 return -ENOMEM; in ipoctal_probe()
702 ipoctal->dev = dev; in ipoctal_probe()
703 res = ipoctal_inst_slot(ipoctal, dev->bus->bus_nr, dev->slot); in ipoctal_probe()
707 dev_set_drvdata(&dev->dev, ipoctal); in ipoctal_probe()
719 ipoctal->dev->bus->ops->free_irq(ipoctal->dev); in __ipoctal_remove()
722 struct ipoctal_channel *channel = &ipoctal->channel[i]; in __ipoctal_remove() local
724 if (!channel->tty_registered) in __ipoctal_remove()
727 tty_unregister_device(ipoctal->tty_drv, i); in __ipoctal_remove()
728 tty_port_free_xmit_buf(&channel->tty_port); in __ipoctal_remove()
729 tty_port_destroy(&channel->tty_port); in __ipoctal_remove()
732 tty_unregister_driver(ipoctal->tty_drv); in __ipoctal_remove()
733 kfree(ipoctal->tty_drv->name); in __ipoctal_remove()
734 put_tty_driver(ipoctal->tty_drv); in __ipoctal_remove()
740 __ipoctal_remove(dev_get_drvdata(&idev->dev)); in ipoctal_remove()
775 MODULE_DESCRIPTION("IP-Octal 232, 422 and 485 device driver");