Lines Matching full:port
108 /* Driver data, a structure for each UART port */
128 struct uart_port *port; member
138 static struct mvebu_uart *to_mvuart(struct uart_port *port) in to_mvuart() argument
140 return (struct mvebu_uart *)port->private_data; in to_mvuart()
143 #define IS_EXTENDED(port) (to_mvuart(port)->data->is_ext) argument
145 #define UART_RBR(port) (to_mvuart(port)->data->regs.rbr) argument
146 #define UART_TSH(port) (to_mvuart(port)->data->regs.tsh) argument
147 #define UART_CTRL(port) (to_mvuart(port)->data->regs.ctrl) argument
148 #define UART_INTR(port) (to_mvuart(port)->data->regs.intr) argument
150 #define CTRL_TX_RDY_INT(port) (to_mvuart(port)->data->flags.ctrl_tx_rdy_int) argument
151 #define CTRL_RX_RDY_INT(port) (to_mvuart(port)->data->flags.ctrl_rx_rdy_int) argument
152 #define STAT_TX_RDY(port) (to_mvuart(port)->data->flags.stat_tx_rdy) argument
153 #define STAT_RX_RDY(port) (to_mvuart(port)->data->flags.stat_rx_rdy) argument
158 static unsigned int mvebu_uart_tx_empty(struct uart_port *port) in mvebu_uart_tx_empty() argument
163 spin_lock_irqsave(&port->lock, flags); in mvebu_uart_tx_empty()
164 st = readl(port->membase + UART_STAT); in mvebu_uart_tx_empty()
165 spin_unlock_irqrestore(&port->lock, flags); in mvebu_uart_tx_empty()
170 static unsigned int mvebu_uart_get_mctrl(struct uart_port *port) in mvebu_uart_get_mctrl() argument
175 static void mvebu_uart_set_mctrl(struct uart_port *port, in mvebu_uart_set_mctrl() argument
184 static void mvebu_uart_stop_tx(struct uart_port *port) in mvebu_uart_stop_tx() argument
186 unsigned int ctl = readl(port->membase + UART_INTR(port)); in mvebu_uart_stop_tx()
188 ctl &= ~CTRL_TX_RDY_INT(port); in mvebu_uart_stop_tx()
189 writel(ctl, port->membase + UART_INTR(port)); in mvebu_uart_stop_tx()
192 static void mvebu_uart_start_tx(struct uart_port *port) in mvebu_uart_start_tx() argument
195 struct circ_buf *xmit = &port->state->xmit; in mvebu_uart_start_tx()
197 if (IS_EXTENDED(port) && !uart_circ_empty(xmit)) { in mvebu_uart_start_tx()
198 writel(xmit->buf[xmit->tail], port->membase + UART_TSH(port)); in mvebu_uart_start_tx()
200 port->icount.tx++; in mvebu_uart_start_tx()
203 ctl = readl(port->membase + UART_INTR(port)); in mvebu_uart_start_tx()
204 ctl |= CTRL_TX_RDY_INT(port); in mvebu_uart_start_tx()
205 writel(ctl, port->membase + UART_INTR(port)); in mvebu_uart_start_tx()
208 static void mvebu_uart_stop_rx(struct uart_port *port) in mvebu_uart_stop_rx() argument
212 ctl = readl(port->membase + UART_CTRL(port)); in mvebu_uart_stop_rx()
214 writel(ctl, port->membase + UART_CTRL(port)); in mvebu_uart_stop_rx()
216 ctl = readl(port->membase + UART_INTR(port)); in mvebu_uart_stop_rx()
217 ctl &= ~CTRL_RX_RDY_INT(port); in mvebu_uart_stop_rx()
218 writel(ctl, port->membase + UART_INTR(port)); in mvebu_uart_stop_rx()
221 static void mvebu_uart_break_ctl(struct uart_port *port, int brk) in mvebu_uart_break_ctl() argument
226 spin_lock_irqsave(&port->lock, flags); in mvebu_uart_break_ctl()
227 ctl = readl(port->membase + UART_CTRL(port)); in mvebu_uart_break_ctl()
232 writel(ctl, port->membase + UART_CTRL(port)); in mvebu_uart_break_ctl()
233 spin_unlock_irqrestore(&port->lock, flags); in mvebu_uart_break_ctl()
236 static void mvebu_uart_rx_chars(struct uart_port *port, unsigned int status) in mvebu_uart_rx_chars() argument
238 struct tty_port *tport = &port->state->port; in mvebu_uart_rx_chars()
243 if (status & STAT_RX_RDY(port)) { in mvebu_uart_rx_chars()
244 ch = readl(port->membase + UART_RBR(port)); in mvebu_uart_rx_chars()
247 port->icount.rx++; in mvebu_uart_rx_chars()
250 port->icount.parity++; in mvebu_uart_rx_chars()
254 port->icount.brk++; in mvebu_uart_rx_chars()
256 if (uart_handle_break(port)) in mvebu_uart_rx_chars()
261 port->icount.overrun++; in mvebu_uart_rx_chars()
264 port->icount.frame++; in mvebu_uart_rx_chars()
266 if (uart_handle_sysrq_char(port, ch)) in mvebu_uart_rx_chars()
269 if (status & port->ignore_status_mask & STAT_PAR_ERR) in mvebu_uart_rx_chars()
270 status &= ~STAT_RX_RDY(port); in mvebu_uart_rx_chars()
272 status &= port->read_status_mask; in mvebu_uart_rx_chars()
277 status &= ~port->ignore_status_mask; in mvebu_uart_rx_chars()
279 if (status & STAT_RX_RDY(port)) in mvebu_uart_rx_chars()
292 status = readl(port->membase + UART_STAT); in mvebu_uart_rx_chars()
293 } while (status & (STAT_RX_RDY(port) | STAT_BRK_DET)); in mvebu_uart_rx_chars()
298 static void mvebu_uart_tx_chars(struct uart_port *port, unsigned int status) in mvebu_uart_tx_chars() argument
300 struct circ_buf *xmit = &port->state->xmit; in mvebu_uart_tx_chars()
304 if (port->x_char) { in mvebu_uart_tx_chars()
305 writel(port->x_char, port->membase + UART_TSH(port)); in mvebu_uart_tx_chars()
306 port->icount.tx++; in mvebu_uart_tx_chars()
307 port->x_char = 0; in mvebu_uart_tx_chars()
311 if (uart_circ_empty(xmit) || uart_tx_stopped(port)) { in mvebu_uart_tx_chars()
312 mvebu_uart_stop_tx(port); in mvebu_uart_tx_chars()
316 for (count = 0; count < port->fifosize; count++) { in mvebu_uart_tx_chars()
317 writel(xmit->buf[xmit->tail], port->membase + UART_TSH(port)); in mvebu_uart_tx_chars()
319 port->icount.tx++; in mvebu_uart_tx_chars()
324 st = readl(port->membase + UART_STAT); in mvebu_uart_tx_chars()
330 uart_write_wakeup(port); in mvebu_uart_tx_chars()
333 mvebu_uart_stop_tx(port); in mvebu_uart_tx_chars()
338 struct uart_port *port = (struct uart_port *)dev_id; in mvebu_uart_isr() local
339 unsigned int st = readl(port->membase + UART_STAT); in mvebu_uart_isr()
341 if (st & (STAT_RX_RDY(port) | STAT_OVR_ERR | STAT_FRM_ERR | in mvebu_uart_isr()
343 mvebu_uart_rx_chars(port, st); in mvebu_uart_isr()
345 if (st & STAT_TX_RDY(port)) in mvebu_uart_isr()
346 mvebu_uart_tx_chars(port, st); in mvebu_uart_isr()
353 struct uart_port *port = (struct uart_port *)dev_id; in mvebu_uart_rx_isr() local
354 unsigned int st = readl(port->membase + UART_STAT); in mvebu_uart_rx_isr()
356 if (st & (STAT_RX_RDY(port) | STAT_OVR_ERR | STAT_FRM_ERR | in mvebu_uart_rx_isr()
358 mvebu_uart_rx_chars(port, st); in mvebu_uart_rx_isr()
365 struct uart_port *port = (struct uart_port *)dev_id; in mvebu_uart_tx_isr() local
366 unsigned int st = readl(port->membase + UART_STAT); in mvebu_uart_tx_isr()
368 if (st & STAT_TX_RDY(port)) in mvebu_uart_tx_isr()
369 mvebu_uart_tx_chars(port, st); in mvebu_uart_tx_isr()
374 static int mvebu_uart_startup(struct uart_port *port) in mvebu_uart_startup() argument
376 struct mvebu_uart *mvuart = to_mvuart(port); in mvebu_uart_startup()
381 port->membase + UART_CTRL(port)); in mvebu_uart_startup()
385 ret = readl(port->membase + UART_STAT); in mvebu_uart_startup()
387 writel(ret, port->membase + UART_STAT); in mvebu_uart_startup()
389 writel(CTRL_BRK_INT, port->membase + UART_CTRL(port)); in mvebu_uart_startup()
391 ctl = readl(port->membase + UART_INTR(port)); in mvebu_uart_startup()
392 ctl |= CTRL_RX_RDY_INT(port); in mvebu_uart_startup()
393 writel(ctl, port->membase + UART_INTR(port)); in mvebu_uart_startup()
397 ret = devm_request_irq(port->dev, mvuart->irq[UART_IRQ_SUM], in mvebu_uart_startup()
398 mvebu_uart_isr, port->irqflags, in mvebu_uart_startup()
399 dev_name(port->dev), port); in mvebu_uart_startup()
401 dev_err(port->dev, "unable to request IRQ %d\n", in mvebu_uart_startup()
407 ret = devm_request_irq(port->dev, mvuart->irq[UART_RX_IRQ], in mvebu_uart_startup()
408 mvebu_uart_rx_isr, port->irqflags, in mvebu_uart_startup()
409 dev_name(port->dev), port); in mvebu_uart_startup()
411 dev_err(port->dev, "unable to request IRQ %d\n", in mvebu_uart_startup()
416 ret = devm_request_irq(port->dev, mvuart->irq[UART_TX_IRQ], in mvebu_uart_startup()
417 mvebu_uart_tx_isr, port->irqflags, in mvebu_uart_startup()
418 dev_name(port->dev), in mvebu_uart_startup()
419 port); in mvebu_uart_startup()
421 dev_err(port->dev, "unable to request IRQ %d\n", in mvebu_uart_startup()
423 devm_free_irq(port->dev, mvuart->irq[UART_RX_IRQ], in mvebu_uart_startup()
424 port); in mvebu_uart_startup()
432 static void mvebu_uart_shutdown(struct uart_port *port) in mvebu_uart_shutdown() argument
434 struct mvebu_uart *mvuart = to_mvuart(port); in mvebu_uart_shutdown()
436 writel(0, port->membase + UART_INTR(port)); in mvebu_uart_shutdown()
439 devm_free_irq(port->dev, mvuart->irq[UART_IRQ_SUM], port); in mvebu_uart_shutdown()
441 devm_free_irq(port->dev, mvuart->irq[UART_RX_IRQ], port); in mvebu_uart_shutdown()
442 devm_free_irq(port->dev, mvuart->irq[UART_TX_IRQ], port); in mvebu_uart_shutdown()
446 static int mvebu_uart_baud_rate_set(struct uart_port *port, unsigned int baud) in mvebu_uart_baud_rate_set() argument
451 if (!port->uartclk) in mvebu_uart_baud_rate_set()
465 d_divisor = DIV_ROUND_CLOSEST(port->uartclk, baud * m_divisor); in mvebu_uart_baud_rate_set()
467 brdv = readl(port->membase + UART_BRDV); in mvebu_uart_baud_rate_set()
470 writel(brdv, port->membase + UART_BRDV); in mvebu_uart_baud_rate_set()
472 osamp = readl(port->membase + UART_OSAMP); in mvebu_uart_baud_rate_set()
474 writel(osamp, port->membase + UART_OSAMP); in mvebu_uart_baud_rate_set()
479 static void mvebu_uart_set_termios(struct uart_port *port, in mvebu_uart_set_termios() argument
486 spin_lock_irqsave(&port->lock, flags); in mvebu_uart_set_termios()
488 port->read_status_mask = STAT_RX_RDY(port) | STAT_OVR_ERR | in mvebu_uart_set_termios()
489 STAT_TX_RDY(port) | STAT_TX_FIFO_FUL; in mvebu_uart_set_termios()
492 port->read_status_mask |= STAT_FRM_ERR | STAT_PAR_ERR; in mvebu_uart_set_termios()
494 port->ignore_status_mask = 0; in mvebu_uart_set_termios()
496 port->ignore_status_mask |= in mvebu_uart_set_termios()
500 port->ignore_status_mask |= STAT_RX_RDY(port) | STAT_BRK_ERR; in mvebu_uart_set_termios()
509 min_baud = DIV_ROUND_UP(port->uartclk, 1023 * 16); in mvebu_uart_set_termios()
512 baud = uart_get_baud_rate(port, termios, old, min_baud, max_baud); in mvebu_uart_set_termios()
513 if (mvebu_uart_baud_rate_set(port, baud)) { in mvebu_uart_set_termios()
516 baud = uart_get_baud_rate(port, old, NULL, in mvebu_uart_set_termios()
520 uart_update_timeout(port, termios->c_cflag, baud); in mvebu_uart_set_termios()
532 spin_unlock_irqrestore(&port->lock, flags); in mvebu_uart_set_termios()
535 static const char *mvebu_uart_type(struct uart_port *port) in mvebu_uart_type() argument
540 static void mvebu_uart_release_port(struct uart_port *port) in mvebu_uart_release_port() argument
545 static int mvebu_uart_request_port(struct uart_port *port) in mvebu_uart_request_port() argument
551 static int mvebu_uart_get_poll_char(struct uart_port *port) in mvebu_uart_get_poll_char() argument
553 unsigned int st = readl(port->membase + UART_STAT); in mvebu_uart_get_poll_char()
555 if (!(st & STAT_RX_RDY(port))) in mvebu_uart_get_poll_char()
558 return readl(port->membase + UART_RBR(port)); in mvebu_uart_get_poll_char()
561 static void mvebu_uart_put_poll_char(struct uart_port *port, unsigned char c) in mvebu_uart_put_poll_char() argument
566 st = readl(port->membase + UART_STAT); in mvebu_uart_put_poll_char()
574 writel(c, port->membase + UART_TSH(port)); in mvebu_uart_put_poll_char()
602 static void mvebu_uart_putc(struct uart_port *port, int c) in mvebu_uart_putc() argument
607 st = readl(port->membase + UART_STAT); in mvebu_uart_putc()
613 writel(c, port->membase + UART_STD_TSH); in mvebu_uart_putc()
616 st = readl(port->membase + UART_STAT); in mvebu_uart_putc()
628 uart_console_write(&dev->port, s, n, mvebu_uart_putc); in mvebu_uart_putc_early_write()
635 if (!device->port.membase) in mvebu_uart_early_console_setup()
647 static void wait_for_xmitr(struct uart_port *port) in wait_for_xmitr() argument
651 readl_poll_timeout_atomic(port->membase + UART_STAT, val, in wait_for_xmitr()
652 (val & STAT_TX_RDY(port)), 1, 10000); in wait_for_xmitr()
655 static void wait_for_xmite(struct uart_port *port) in wait_for_xmite() argument
659 readl_poll_timeout_atomic(port->membase + UART_STAT, val, in wait_for_xmite()
663 static void mvebu_uart_console_putchar(struct uart_port *port, int ch) in mvebu_uart_console_putchar() argument
665 wait_for_xmitr(port); in mvebu_uart_console_putchar()
666 writel(ch, port->membase + UART_TSH(port)); in mvebu_uart_console_putchar()
672 struct uart_port *port = &mvebu_uart_ports[co->index]; in mvebu_uart_console_write() local
678 locked = spin_trylock_irqsave(&port->lock, flags); in mvebu_uart_console_write()
680 spin_lock_irqsave(&port->lock, flags); in mvebu_uart_console_write()
682 ier = readl(port->membase + UART_CTRL(port)) & CTRL_BRK_INT; in mvebu_uart_console_write()
683 intr = readl(port->membase + UART_INTR(port)) & in mvebu_uart_console_write()
684 (CTRL_RX_RDY_INT(port) | CTRL_TX_RDY_INT(port)); in mvebu_uart_console_write()
685 writel(0, port->membase + UART_CTRL(port)); in mvebu_uart_console_write()
686 writel(0, port->membase + UART_INTR(port)); in mvebu_uart_console_write()
688 uart_console_write(port, s, count, mvebu_uart_console_putchar); in mvebu_uart_console_write()
690 wait_for_xmite(port); in mvebu_uart_console_write()
693 writel(ier, port->membase + UART_CTRL(port)); in mvebu_uart_console_write()
696 ctl = intr | readl(port->membase + UART_INTR(port)); in mvebu_uart_console_write()
697 writel(ctl, port->membase + UART_INTR(port)); in mvebu_uart_console_write()
701 spin_unlock_irqrestore(&port->lock, flags); in mvebu_uart_console_write()
706 struct uart_port *port; in mvebu_uart_console_setup() local
715 port = &mvebu_uart_ports[co->index]; in mvebu_uart_console_setup()
717 if (!port->mapbase || !port->membase) { in mvebu_uart_console_setup()
725 return uart_set_options(port, co, baud, parity, bits, flow); in mvebu_uart_console_setup()
765 struct uart_port *port = mvuart->port; in mvebu_uart_suspend() local
767 uart_suspend_port(&mvebu_uart_driver, port); in mvebu_uart_suspend()
769 mvuart->pm_regs.rbr = readl(port->membase + UART_RBR(port)); in mvebu_uart_suspend()
770 mvuart->pm_regs.tsh = readl(port->membase + UART_TSH(port)); in mvebu_uart_suspend()
771 mvuart->pm_regs.ctrl = readl(port->membase + UART_CTRL(port)); in mvebu_uart_suspend()
772 mvuart->pm_regs.intr = readl(port->membase + UART_INTR(port)); in mvebu_uart_suspend()
773 mvuart->pm_regs.stat = readl(port->membase + UART_STAT); in mvebu_uart_suspend()
774 mvuart->pm_regs.brdv = readl(port->membase + UART_BRDV); in mvebu_uart_suspend()
775 mvuart->pm_regs.osamp = readl(port->membase + UART_OSAMP); in mvebu_uart_suspend()
785 struct uart_port *port = mvuart->port; in mvebu_uart_resume() local
787 writel(mvuart->pm_regs.rbr, port->membase + UART_RBR(port)); in mvebu_uart_resume()
788 writel(mvuart->pm_regs.tsh, port->membase + UART_TSH(port)); in mvebu_uart_resume()
789 writel(mvuart->pm_regs.ctrl, port->membase + UART_CTRL(port)); in mvebu_uart_resume()
790 writel(mvuart->pm_regs.intr, port->membase + UART_INTR(port)); in mvebu_uart_resume()
791 writel(mvuart->pm_regs.stat, port->membase + UART_STAT); in mvebu_uart_resume()
792 writel(mvuart->pm_regs.brdv, port->membase + UART_BRDV); in mvebu_uart_resume()
793 writel(mvuart->pm_regs.osamp, port->membase + UART_OSAMP); in mvebu_uart_resume()
795 uart_resume_port(&mvebu_uart_driver, port); in mvebu_uart_resume()
808 /* Counter to keep track of each UART port id when not using CONFIG_OF */
816 struct uart_port *port; in mvebu_uart_probe() local
838 port = &mvebu_uart_ports[pdev->id]; in mvebu_uart_probe()
840 spin_lock_init(&port->lock); in mvebu_uart_probe()
842 port->dev = &pdev->dev; in mvebu_uart_probe()
843 port->type = PORT_MVEBU; in mvebu_uart_probe()
844 port->ops = &mvebu_uart_ops; in mvebu_uart_probe()
845 port->regshift = 0; in mvebu_uart_probe()
847 port->fifosize = 32; in mvebu_uart_probe()
848 port->iotype = UPIO_MEM32; in mvebu_uart_probe()
849 port->flags = UPF_FIXED_PORT; in mvebu_uart_probe()
850 port->line = pdev->id; in mvebu_uart_probe()
854 * them per port (RX and TX). Instead, use the driver UART structure in mvebu_uart_probe()
857 port->irq = 0; in mvebu_uart_probe()
858 port->irqflags = 0; in mvebu_uart_probe()
859 port->mapbase = reg->start; in mvebu_uart_probe()
861 port->membase = devm_ioremap_resource(&pdev->dev, reg); in mvebu_uart_probe()
862 if (IS_ERR(port->membase)) in mvebu_uart_probe()
863 return PTR_ERR(port->membase); in mvebu_uart_probe()
872 mvuart->port = port; in mvebu_uart_probe()
874 port->private_data = mvuart; in mvebu_uart_probe()
883 if (IS_EXTENDED(port)) { in mvebu_uart_probe()
889 port->uartclk = clk_get_rate(mvuart->clk); in mvebu_uart_probe()
904 * uart-sum of UART0 port. in mvebu_uart_probe()
920 writel(CTRL_SOFT_RST, port->membase + UART_CTRL(port)); in mvebu_uart_probe()
922 writel(0, port->membase + UART_CTRL(port)); in mvebu_uart_probe()
924 return uart_add_one_port(&mvebu_uart_driver, port); in mvebu_uart_probe()