Lines Matching full:port
108 /* Driver data, a structure for each UART port */
128 struct uart_port *port; member
137 static struct mvebu_uart *to_mvuart(struct uart_port *port) in to_mvuart() argument
139 return (struct mvebu_uart *)port->private_data; in to_mvuart()
142 #define IS_EXTENDED(port) (to_mvuart(port)->data->is_ext) argument
144 #define UART_RBR(port) (to_mvuart(port)->data->regs.rbr) argument
145 #define UART_TSH(port) (to_mvuart(port)->data->regs.tsh) argument
146 #define UART_CTRL(port) (to_mvuart(port)->data->regs.ctrl) argument
147 #define UART_INTR(port) (to_mvuart(port)->data->regs.intr) argument
149 #define CTRL_TX_RDY_INT(port) (to_mvuart(port)->data->flags.ctrl_tx_rdy_int) argument
150 #define CTRL_RX_RDY_INT(port) (to_mvuart(port)->data->flags.ctrl_rx_rdy_int) argument
151 #define STAT_TX_RDY(port) (to_mvuart(port)->data->flags.stat_tx_rdy) argument
152 #define STAT_RX_RDY(port) (to_mvuart(port)->data->flags.stat_rx_rdy) argument
157 static unsigned int mvebu_uart_tx_empty(struct uart_port *port) in mvebu_uart_tx_empty() argument
162 spin_lock_irqsave(&port->lock, flags); in mvebu_uart_tx_empty()
163 st = readl(port->membase + UART_STAT); in mvebu_uart_tx_empty()
164 spin_unlock_irqrestore(&port->lock, flags); in mvebu_uart_tx_empty()
169 static unsigned int mvebu_uart_get_mctrl(struct uart_port *port) in mvebu_uart_get_mctrl() argument
174 static void mvebu_uart_set_mctrl(struct uart_port *port, in mvebu_uart_set_mctrl() argument
183 static void mvebu_uart_stop_tx(struct uart_port *port) in mvebu_uart_stop_tx() argument
185 unsigned int ctl = readl(port->membase + UART_INTR(port)); in mvebu_uart_stop_tx()
187 ctl &= ~CTRL_TX_RDY_INT(port); in mvebu_uart_stop_tx()
188 writel(ctl, port->membase + UART_INTR(port)); in mvebu_uart_stop_tx()
191 static void mvebu_uart_start_tx(struct uart_port *port) in mvebu_uart_start_tx() argument
194 struct circ_buf *xmit = &port->state->xmit; in mvebu_uart_start_tx()
196 if (IS_EXTENDED(port) && !uart_circ_empty(xmit)) { in mvebu_uart_start_tx()
197 writel(xmit->buf[xmit->tail], port->membase + UART_TSH(port)); in mvebu_uart_start_tx()
199 port->icount.tx++; in mvebu_uart_start_tx()
202 ctl = readl(port->membase + UART_INTR(port)); in mvebu_uart_start_tx()
203 ctl |= CTRL_TX_RDY_INT(port); in mvebu_uart_start_tx()
204 writel(ctl, port->membase + UART_INTR(port)); in mvebu_uart_start_tx()
207 static void mvebu_uart_stop_rx(struct uart_port *port) in mvebu_uart_stop_rx() argument
211 ctl = readl(port->membase + UART_CTRL(port)); in mvebu_uart_stop_rx()
213 writel(ctl, port->membase + UART_CTRL(port)); in mvebu_uart_stop_rx()
215 ctl = readl(port->membase + UART_INTR(port)); in mvebu_uart_stop_rx()
216 ctl &= ~CTRL_RX_RDY_INT(port); in mvebu_uart_stop_rx()
217 writel(ctl, port->membase + UART_INTR(port)); in mvebu_uart_stop_rx()
220 static void mvebu_uart_break_ctl(struct uart_port *port, int brk) in mvebu_uart_break_ctl() argument
225 spin_lock_irqsave(&port->lock, flags); in mvebu_uart_break_ctl()
226 ctl = readl(port->membase + UART_CTRL(port)); in mvebu_uart_break_ctl()
231 writel(ctl, port->membase + UART_CTRL(port)); in mvebu_uart_break_ctl()
232 spin_unlock_irqrestore(&port->lock, flags); in mvebu_uart_break_ctl()
235 static void mvebu_uart_rx_chars(struct uart_port *port, unsigned int status) in mvebu_uart_rx_chars() argument
237 struct tty_port *tport = &port->state->port; in mvebu_uart_rx_chars()
242 if (status & STAT_RX_RDY(port)) { in mvebu_uart_rx_chars()
243 ch = readl(port->membase + UART_RBR(port)); in mvebu_uart_rx_chars()
246 port->icount.rx++; in mvebu_uart_rx_chars()
249 port->icount.parity++; in mvebu_uart_rx_chars()
253 port->icount.brk++; in mvebu_uart_rx_chars()
255 if (uart_handle_break(port)) in mvebu_uart_rx_chars()
260 port->icount.overrun++; in mvebu_uart_rx_chars()
263 port->icount.frame++; in mvebu_uart_rx_chars()
265 if (uart_handle_sysrq_char(port, ch)) in mvebu_uart_rx_chars()
268 if (status & port->ignore_status_mask & STAT_PAR_ERR) in mvebu_uart_rx_chars()
269 status &= ~STAT_RX_RDY(port); in mvebu_uart_rx_chars()
271 status &= port->read_status_mask; in mvebu_uart_rx_chars()
276 status &= ~port->ignore_status_mask; in mvebu_uart_rx_chars()
278 if (status & STAT_RX_RDY(port)) in mvebu_uart_rx_chars()
291 status = readl(port->membase + UART_STAT); in mvebu_uart_rx_chars()
292 } while (status & (STAT_RX_RDY(port) | STAT_BRK_DET)); in mvebu_uart_rx_chars()
297 static void mvebu_uart_tx_chars(struct uart_port *port, unsigned int status) in mvebu_uart_tx_chars() argument
299 struct circ_buf *xmit = &port->state->xmit; in mvebu_uart_tx_chars()
303 if (port->x_char) { in mvebu_uart_tx_chars()
304 writel(port->x_char, port->membase + UART_TSH(port)); in mvebu_uart_tx_chars()
305 port->icount.tx++; in mvebu_uart_tx_chars()
306 port->x_char = 0; in mvebu_uart_tx_chars()
310 if (uart_circ_empty(xmit) || uart_tx_stopped(port)) { in mvebu_uart_tx_chars()
311 mvebu_uart_stop_tx(port); in mvebu_uart_tx_chars()
315 for (count = 0; count < port->fifosize; count++) { in mvebu_uart_tx_chars()
316 writel(xmit->buf[xmit->tail], port->membase + UART_TSH(port)); in mvebu_uart_tx_chars()
318 port->icount.tx++; in mvebu_uart_tx_chars()
323 st = readl(port->membase + UART_STAT); in mvebu_uart_tx_chars()
329 uart_write_wakeup(port); in mvebu_uart_tx_chars()
332 mvebu_uart_stop_tx(port); in mvebu_uart_tx_chars()
337 struct uart_port *port = (struct uart_port *)dev_id; in mvebu_uart_isr() local
338 unsigned int st = readl(port->membase + UART_STAT); in mvebu_uart_isr()
340 if (st & (STAT_RX_RDY(port) | STAT_OVR_ERR | STAT_FRM_ERR | in mvebu_uart_isr()
342 mvebu_uart_rx_chars(port, st); in mvebu_uart_isr()
344 if (st & STAT_TX_RDY(port)) in mvebu_uart_isr()
345 mvebu_uart_tx_chars(port, st); in mvebu_uart_isr()
352 struct uart_port *port = (struct uart_port *)dev_id; in mvebu_uart_rx_isr() local
353 unsigned int st = readl(port->membase + UART_STAT); in mvebu_uart_rx_isr()
355 if (st & (STAT_RX_RDY(port) | STAT_OVR_ERR | STAT_FRM_ERR | in mvebu_uart_rx_isr()
357 mvebu_uart_rx_chars(port, st); in mvebu_uart_rx_isr()
364 struct uart_port *port = (struct uart_port *)dev_id; in mvebu_uart_tx_isr() local
365 unsigned int st = readl(port->membase + UART_STAT); in mvebu_uart_tx_isr()
367 if (st & STAT_TX_RDY(port)) in mvebu_uart_tx_isr()
368 mvebu_uart_tx_chars(port, st); in mvebu_uart_tx_isr()
373 static int mvebu_uart_startup(struct uart_port *port) in mvebu_uart_startup() argument
375 struct mvebu_uart *mvuart = to_mvuart(port); in mvebu_uart_startup()
380 port->membase + UART_CTRL(port)); in mvebu_uart_startup()
384 ret = readl(port->membase + UART_STAT); in mvebu_uart_startup()
386 writel(ret, port->membase + UART_STAT); in mvebu_uart_startup()
388 writel(CTRL_BRK_INT, port->membase + UART_CTRL(port)); in mvebu_uart_startup()
390 ctl = readl(port->membase + UART_INTR(port)); in mvebu_uart_startup()
391 ctl |= CTRL_RX_RDY_INT(port); in mvebu_uart_startup()
392 writel(ctl, port->membase + UART_INTR(port)); in mvebu_uart_startup()
396 ret = devm_request_irq(port->dev, mvuart->irq[UART_IRQ_SUM], in mvebu_uart_startup()
397 mvebu_uart_isr, port->irqflags, in mvebu_uart_startup()
398 dev_name(port->dev), port); in mvebu_uart_startup()
400 dev_err(port->dev, "unable to request IRQ %d\n", in mvebu_uart_startup()
406 ret = devm_request_irq(port->dev, mvuart->irq[UART_RX_IRQ], in mvebu_uart_startup()
407 mvebu_uart_rx_isr, port->irqflags, in mvebu_uart_startup()
408 dev_name(port->dev), port); in mvebu_uart_startup()
410 dev_err(port->dev, "unable to request IRQ %d\n", in mvebu_uart_startup()
415 ret = devm_request_irq(port->dev, mvuart->irq[UART_TX_IRQ], in mvebu_uart_startup()
416 mvebu_uart_tx_isr, port->irqflags, in mvebu_uart_startup()
417 dev_name(port->dev), in mvebu_uart_startup()
418 port); in mvebu_uart_startup()
420 dev_err(port->dev, "unable to request IRQ %d\n", in mvebu_uart_startup()
422 devm_free_irq(port->dev, mvuart->irq[UART_RX_IRQ], in mvebu_uart_startup()
423 port); in mvebu_uart_startup()
431 static void mvebu_uart_shutdown(struct uart_port *port) in mvebu_uart_shutdown() argument
433 struct mvebu_uart *mvuart = to_mvuart(port); in mvebu_uart_shutdown()
435 writel(0, port->membase + UART_INTR(port)); in mvebu_uart_shutdown()
438 devm_free_irq(port->dev, mvuart->irq[UART_IRQ_SUM], port); in mvebu_uart_shutdown()
440 devm_free_irq(port->dev, mvuart->irq[UART_RX_IRQ], port); in mvebu_uart_shutdown()
441 devm_free_irq(port->dev, mvuart->irq[UART_TX_IRQ], port); in mvebu_uart_shutdown()
445 static int mvebu_uart_baud_rate_set(struct uart_port *port, unsigned int baud) in mvebu_uart_baud_rate_set() argument
450 if (!port->uartclk) in mvebu_uart_baud_rate_set()
464 d_divisor = DIV_ROUND_CLOSEST(port->uartclk, baud * m_divisor); in mvebu_uart_baud_rate_set()
466 brdv = readl(port->membase + UART_BRDV); in mvebu_uart_baud_rate_set()
469 writel(brdv, port->membase + UART_BRDV); in mvebu_uart_baud_rate_set()
471 osamp = readl(port->membase + UART_OSAMP); in mvebu_uart_baud_rate_set()
473 writel(osamp, port->membase + UART_OSAMP); in mvebu_uart_baud_rate_set()
478 static void mvebu_uart_set_termios(struct uart_port *port, in mvebu_uart_set_termios() argument
485 spin_lock_irqsave(&port->lock, flags); in mvebu_uart_set_termios()
487 port->read_status_mask = STAT_RX_RDY(port) | STAT_OVR_ERR | in mvebu_uart_set_termios()
488 STAT_TX_RDY(port) | STAT_TX_FIFO_FUL; in mvebu_uart_set_termios()
491 port->read_status_mask |= STAT_FRM_ERR | STAT_PAR_ERR; in mvebu_uart_set_termios()
493 port->ignore_status_mask = 0; in mvebu_uart_set_termios()
495 port->ignore_status_mask |= in mvebu_uart_set_termios()
499 port->ignore_status_mask |= STAT_RX_RDY(port) | STAT_BRK_ERR; in mvebu_uart_set_termios()
508 min_baud = DIV_ROUND_UP(port->uartclk, 1023 * 16); in mvebu_uart_set_termios()
511 baud = uart_get_baud_rate(port, termios, old, min_baud, max_baud); in mvebu_uart_set_termios()
512 if (mvebu_uart_baud_rate_set(port, baud)) { in mvebu_uart_set_termios()
515 baud = uart_get_baud_rate(port, old, NULL, in mvebu_uart_set_termios()
519 uart_update_timeout(port, termios->c_cflag, baud); in mvebu_uart_set_termios()
531 spin_unlock_irqrestore(&port->lock, flags); in mvebu_uart_set_termios()
534 static const char *mvebu_uart_type(struct uart_port *port) in mvebu_uart_type() argument
539 static void mvebu_uart_release_port(struct uart_port *port) in mvebu_uart_release_port() argument
544 static int mvebu_uart_request_port(struct uart_port *port) in mvebu_uart_request_port() argument
550 static int mvebu_uart_get_poll_char(struct uart_port *port) in mvebu_uart_get_poll_char() argument
552 unsigned int st = readl(port->membase + UART_STAT); in mvebu_uart_get_poll_char()
554 if (!(st & STAT_RX_RDY(port))) in mvebu_uart_get_poll_char()
557 return readl(port->membase + UART_RBR(port)); in mvebu_uart_get_poll_char()
560 static void mvebu_uart_put_poll_char(struct uart_port *port, unsigned char c) in mvebu_uart_put_poll_char() argument
565 st = readl(port->membase + UART_STAT); in mvebu_uart_put_poll_char()
573 writel(c, port->membase + UART_TSH(port)); in mvebu_uart_put_poll_char()
601 static void mvebu_uart_putc(struct uart_port *port, int c) in mvebu_uart_putc() argument
606 st = readl(port->membase + UART_STAT); in mvebu_uart_putc()
612 writel(c, port->membase + UART_STD_TSH); in mvebu_uart_putc()
615 st = readl(port->membase + UART_STAT); in mvebu_uart_putc()
627 uart_console_write(&dev->port, s, n, mvebu_uart_putc); in mvebu_uart_putc_early_write()
634 if (!device->port.membase) in mvebu_uart_early_console_setup()
646 static void wait_for_xmitr(struct uart_port *port) in wait_for_xmitr() argument
650 readl_poll_timeout_atomic(port->membase + UART_STAT, val, in wait_for_xmitr()
651 (val & STAT_TX_RDY(port)), 1, 10000); in wait_for_xmitr()
654 static void wait_for_xmite(struct uart_port *port) in wait_for_xmite() argument
658 readl_poll_timeout_atomic(port->membase + UART_STAT, val, in wait_for_xmite()
662 static void mvebu_uart_console_putchar(struct uart_port *port, int ch) in mvebu_uart_console_putchar() argument
664 wait_for_xmitr(port); in mvebu_uart_console_putchar()
665 writel(ch, port->membase + UART_TSH(port)); in mvebu_uart_console_putchar()
671 struct uart_port *port = &mvebu_uart_ports[co->index]; in mvebu_uart_console_write() local
677 locked = spin_trylock_irqsave(&port->lock, flags); in mvebu_uart_console_write()
679 spin_lock_irqsave(&port->lock, flags); in mvebu_uart_console_write()
681 ier = readl(port->membase + UART_CTRL(port)) & CTRL_BRK_INT; in mvebu_uart_console_write()
682 intr = readl(port->membase + UART_INTR(port)) & in mvebu_uart_console_write()
683 (CTRL_RX_RDY_INT(port) | CTRL_TX_RDY_INT(port)); in mvebu_uart_console_write()
684 writel(0, port->membase + UART_CTRL(port)); in mvebu_uart_console_write()
685 writel(0, port->membase + UART_INTR(port)); in mvebu_uart_console_write()
687 uart_console_write(port, s, count, mvebu_uart_console_putchar); in mvebu_uart_console_write()
689 wait_for_xmite(port); in mvebu_uart_console_write()
692 writel(ier, port->membase + UART_CTRL(port)); in mvebu_uart_console_write()
695 ctl = intr | readl(port->membase + UART_INTR(port)); in mvebu_uart_console_write()
696 writel(ctl, port->membase + UART_INTR(port)); in mvebu_uart_console_write()
700 spin_unlock_irqrestore(&port->lock, flags); in mvebu_uart_console_write()
705 struct uart_port *port; in mvebu_uart_console_setup() local
714 port = &mvebu_uart_ports[co->index]; in mvebu_uart_console_setup()
716 if (!port->mapbase || !port->membase) { in mvebu_uart_console_setup()
724 return uart_set_options(port, co, baud, parity, bits, flow); in mvebu_uart_console_setup()
764 struct uart_port *port = mvuart->port; in mvebu_uart_suspend() local
766 uart_suspend_port(&mvebu_uart_driver, port); in mvebu_uart_suspend()
768 mvuart->pm_regs.rbr = readl(port->membase + UART_RBR(port)); in mvebu_uart_suspend()
769 mvuart->pm_regs.tsh = readl(port->membase + UART_TSH(port)); in mvebu_uart_suspend()
770 mvuart->pm_regs.ctrl = readl(port->membase + UART_CTRL(port)); in mvebu_uart_suspend()
771 mvuart->pm_regs.intr = readl(port->membase + UART_INTR(port)); in mvebu_uart_suspend()
772 mvuart->pm_regs.stat = readl(port->membase + UART_STAT); in mvebu_uart_suspend()
773 mvuart->pm_regs.brdv = readl(port->membase + UART_BRDV); in mvebu_uart_suspend()
774 mvuart->pm_regs.osamp = readl(port->membase + UART_OSAMP); in mvebu_uart_suspend()
784 struct uart_port *port = mvuart->port; in mvebu_uart_resume() local
786 writel(mvuart->pm_regs.rbr, port->membase + UART_RBR(port)); in mvebu_uart_resume()
787 writel(mvuart->pm_regs.tsh, port->membase + UART_TSH(port)); in mvebu_uart_resume()
788 writel(mvuart->pm_regs.ctrl, port->membase + UART_CTRL(port)); in mvebu_uart_resume()
789 writel(mvuart->pm_regs.intr, port->membase + UART_INTR(port)); in mvebu_uart_resume()
790 writel(mvuart->pm_regs.stat, port->membase + UART_STAT); in mvebu_uart_resume()
791 writel(mvuart->pm_regs.brdv, port->membase + UART_BRDV); in mvebu_uart_resume()
792 writel(mvuart->pm_regs.osamp, port->membase + UART_OSAMP); in mvebu_uart_resume()
794 uart_resume_port(&mvebu_uart_driver, port); in mvebu_uart_resume()
807 /* Counter to keep track of each UART port id when not using CONFIG_OF */
815 struct uart_port *port; in mvebu_uart_probe() local
837 port = &mvebu_uart_ports[pdev->id]; in mvebu_uart_probe()
839 spin_lock_init(&port->lock); in mvebu_uart_probe()
841 port->dev = &pdev->dev; in mvebu_uart_probe()
842 port->type = PORT_MVEBU; in mvebu_uart_probe()
843 port->ops = &mvebu_uart_ops; in mvebu_uart_probe()
844 port->regshift = 0; in mvebu_uart_probe()
846 port->fifosize = 32; in mvebu_uart_probe()
847 port->iotype = UPIO_MEM32; in mvebu_uart_probe()
848 port->flags = UPF_FIXED_PORT; in mvebu_uart_probe()
849 port->line = pdev->id; in mvebu_uart_probe()
853 * them per port (RX and TX). Instead, use the driver UART structure in mvebu_uart_probe()
856 port->irq = 0; in mvebu_uart_probe()
857 port->irqflags = 0; in mvebu_uart_probe()
858 port->mapbase = reg->start; in mvebu_uart_probe()
860 port->membase = devm_ioremap_resource(&pdev->dev, reg); in mvebu_uart_probe()
861 if (IS_ERR(port->membase)) in mvebu_uart_probe()
862 return PTR_ERR(port->membase); in mvebu_uart_probe()
871 mvuart->port = port; in mvebu_uart_probe()
873 port->private_data = mvuart; in mvebu_uart_probe()
882 if (IS_EXTENDED(port)) { in mvebu_uart_probe()
888 port->uartclk = clk_get_rate(mvuart->clk); in mvebu_uart_probe()
903 * uart-sum of UART0 port. in mvebu_uart_probe()
919 writel(CTRL_SOFT_RST, port->membase + UART_CTRL(port)); in mvebu_uart_probe()
921 writel(0, port->membase + UART_CTRL(port)); in mvebu_uart_probe()
923 return uart_add_one_port(&mvebu_uart_driver, port); in mvebu_uart_probe()