Lines Matching +full:rs485 +full:- +full:rts +full:- +full:delay
1 // SPDX-License-Identifier: GPL-2.0+
3 * Driver for OMAP-UART controller.
16 * this driver as required for the omap-platform.
23 #include <linux/delay.h>
37 #include <linux/platform_data/serial-omap.h>
78 #define OMAP_UART_DMA_CH_FREE -1
175 offset <<= up->port.regshift; in serial_in()
176 return readw(up->port.membase + offset); in serial_in()
181 offset <<= up->port.regshift; in serial_out()
182 writew(value, up->port.membase + offset); in serial_out()
196 struct omap_uart_port_info *pdata = dev_get_platdata(up->dev); in serial_omap_get_context_loss_count()
198 if (!pdata || !pdata->get_context_loss_count) in serial_omap_get_context_loss_count()
199 return -EINVAL; in serial_omap_get_context_loss_count()
201 return pdata->get_context_loss_count(up->dev); in serial_omap_get_context_loss_count()
207 struct omap_uart_port_info *pdata = dev_get_platdata(up->dev); in serial_omap_enable_wakeup()
209 if (!pdata || !pdata->enable_wakeup) in serial_omap_enable_wakeup()
212 pdata->enable_wakeup(up->dev, enable); in serial_omap_enable_wakeup()
223 unsigned int n = port->uartclk / (mode * baud); in calculate_baud_abs_diff()
229 abs_diff = baud - (port->uartclk / (mode * n)); in calculate_baud_abs_diff()
231 abs_diff = -abs_diff; in calculate_baud_abs_diff()
237 * serial_omap_baud_is_mode16 - check if baud rate is MODE16X
257 * serial_omap_get_divisor - calculate divisor value
270 return port->uartclk/(mode * baud); in serial_omap_get_divisor()
277 dev_dbg(up->port.dev, "serial_omap_enable_ms+%d\n", up->port.line); in serial_omap_enable_ms()
279 pm_runtime_get_sync(up->dev); in serial_omap_enable_ms()
280 up->ier |= UART_IER_MSI; in serial_omap_enable_ms()
281 serial_out(up, UART_IER, up->ier); in serial_omap_enable_ms()
282 pm_runtime_mark_last_busy(up->dev); in serial_omap_enable_ms()
283 pm_runtime_put_autosuspend(up->dev); in serial_omap_enable_ms()
291 pm_runtime_get_sync(up->dev); in serial_omap_stop_tx()
293 /* Handle RS-485 */ in serial_omap_stop_tx()
294 if (port->rs485.flags & SER_RS485_ENABLED) { in serial_omap_stop_tx()
295 if (up->scr & OMAP_UART_SCR_TX_EMPTY) { in serial_omap_stop_tx()
300 * disable THR interrupts and toggle the RS-485 GPIO in serial_omap_stop_tx()
303 up->scr &= ~OMAP_UART_SCR_TX_EMPTY; in serial_omap_stop_tx()
304 serial_out(up, UART_OMAP_SCR, up->scr); in serial_omap_stop_tx()
305 res = (port->rs485.flags & SER_RS485_RTS_AFTER_SEND) ? in serial_omap_stop_tx()
307 if (up->rts_gpiod && in serial_omap_stop_tx()
308 gpiod_get_value(up->rts_gpiod) != res) { in serial_omap_stop_tx()
309 if (port->rs485.delay_rts_after_send > 0) in serial_omap_stop_tx()
311 port->rs485.delay_rts_after_send); in serial_omap_stop_tx()
312 gpiod_set_value(up->rts_gpiod, res); in serial_omap_stop_tx()
323 up->scr |= OMAP_UART_SCR_TX_EMPTY; in serial_omap_stop_tx()
324 serial_out(up, UART_OMAP_SCR, up->scr); in serial_omap_stop_tx()
329 if (up->ier & UART_IER_THRI) { in serial_omap_stop_tx()
330 up->ier &= ~UART_IER_THRI; in serial_omap_stop_tx()
331 serial_out(up, UART_IER, up->ier); in serial_omap_stop_tx()
334 pm_runtime_mark_last_busy(up->dev); in serial_omap_stop_tx()
335 pm_runtime_put_autosuspend(up->dev); in serial_omap_stop_tx()
342 pm_runtime_get_sync(up->dev); in serial_omap_stop_rx()
343 up->ier &= ~(UART_IER_RLSI | UART_IER_RDI); in serial_omap_stop_rx()
344 up->port.read_status_mask &= ~UART_LSR_DR; in serial_omap_stop_rx()
345 serial_out(up, UART_IER, up->ier); in serial_omap_stop_rx()
346 pm_runtime_mark_last_busy(up->dev); in serial_omap_stop_rx()
347 pm_runtime_put_autosuspend(up->dev); in serial_omap_stop_rx()
352 struct circ_buf *xmit = &up->port.state->xmit; in transmit_chars()
355 if (up->port.x_char) { in transmit_chars()
356 serial_out(up, UART_TX, up->port.x_char); in transmit_chars()
357 up->port.icount.tx++; in transmit_chars()
358 up->port.x_char = 0; in transmit_chars()
359 if ((up->port.rs485.flags & SER_RS485_ENABLED) && in transmit_chars()
360 !(up->port.rs485.flags & SER_RS485_RX_DURING_TX)) in transmit_chars()
361 up->rs485_tx_filter_count++; in transmit_chars()
365 if (uart_circ_empty(xmit) || uart_tx_stopped(&up->port)) { in transmit_chars()
366 serial_omap_stop_tx(&up->port); in transmit_chars()
369 count = up->port.fifosize / 4; in transmit_chars()
371 serial_out(up, UART_TX, xmit->buf[xmit->tail]); in transmit_chars()
372 xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); in transmit_chars()
373 up->port.icount.tx++; in transmit_chars()
374 if ((up->port.rs485.flags & SER_RS485_ENABLED) && in transmit_chars()
375 !(up->port.rs485.flags & SER_RS485_RX_DURING_TX)) in transmit_chars()
376 up->rs485_tx_filter_count++; in transmit_chars()
380 } while (--count > 0); in transmit_chars()
383 uart_write_wakeup(&up->port); in transmit_chars()
386 serial_omap_stop_tx(&up->port); in transmit_chars()
391 if (!(up->ier & UART_IER_THRI)) { in serial_omap_enable_ier_thri()
392 up->ier |= UART_IER_THRI; in serial_omap_enable_ier_thri()
393 serial_out(up, UART_IER, up->ier); in serial_omap_enable_ier_thri()
402 pm_runtime_get_sync(up->dev); in serial_omap_start_tx()
404 /* Handle RS-485 */ in serial_omap_start_tx()
405 if (port->rs485.flags & SER_RS485_ENABLED) { in serial_omap_start_tx()
407 up->scr &= ~OMAP_UART_SCR_TX_EMPTY; in serial_omap_start_tx()
408 serial_out(up, UART_OMAP_SCR, up->scr); in serial_omap_start_tx()
410 /* if rts not already enabled */ in serial_omap_start_tx()
411 res = (port->rs485.flags & SER_RS485_RTS_ON_SEND) ? 1 : 0; in serial_omap_start_tx()
412 if (up->rts_gpiod && gpiod_get_value(up->rts_gpiod) != res) { in serial_omap_start_tx()
413 gpiod_set_value(up->rts_gpiod, res); in serial_omap_start_tx()
414 if (port->rs485.delay_rts_before_send > 0) in serial_omap_start_tx()
415 mdelay(port->rs485.delay_rts_before_send); in serial_omap_start_tx()
419 if ((port->rs485.flags & SER_RS485_ENABLED) && in serial_omap_start_tx()
420 !(port->rs485.flags & SER_RS485_RX_DURING_TX)) in serial_omap_start_tx()
421 up->rs485_tx_filter_count = 0; in serial_omap_start_tx()
424 pm_runtime_mark_last_busy(up->dev); in serial_omap_start_tx()
425 pm_runtime_put_autosuspend(up->dev); in serial_omap_start_tx()
433 pm_runtime_get_sync(up->dev); in serial_omap_throttle()
434 spin_lock_irqsave(&up->port.lock, flags); in serial_omap_throttle()
435 up->ier &= ~(UART_IER_RLSI | UART_IER_RDI); in serial_omap_throttle()
436 serial_out(up, UART_IER, up->ier); in serial_omap_throttle()
437 spin_unlock_irqrestore(&up->port.lock, flags); in serial_omap_throttle()
438 pm_runtime_mark_last_busy(up->dev); in serial_omap_throttle()
439 pm_runtime_put_autosuspend(up->dev); in serial_omap_throttle()
447 pm_runtime_get_sync(up->dev); in serial_omap_unthrottle()
448 spin_lock_irqsave(&up->port.lock, flags); in serial_omap_unthrottle()
449 up->ier |= UART_IER_RLSI | UART_IER_RDI; in serial_omap_unthrottle()
450 serial_out(up, UART_IER, up->ier); in serial_omap_unthrottle()
451 spin_unlock_irqrestore(&up->port.lock, flags); in serial_omap_unthrottle()
452 pm_runtime_mark_last_busy(up->dev); in serial_omap_unthrottle()
453 pm_runtime_put_autosuspend(up->dev); in serial_omap_unthrottle()
461 status |= up->msr_saved_flags; in check_modem_status()
462 up->msr_saved_flags = 0; in check_modem_status()
466 if (status & UART_MSR_ANY_DELTA && up->ier & UART_IER_MSI && in check_modem_status()
467 up->port.state != NULL) { in check_modem_status()
469 up->port.icount.rng++; in check_modem_status()
471 up->port.icount.dsr++; in check_modem_status()
474 (&up->port, status & UART_MSR_DCD); in check_modem_status()
477 (&up->port, status & UART_MSR_CTS); in check_modem_status()
478 wake_up_interruptible(&up->port.state->port.delta_msr_wait); in check_modem_status()
490 * to the table 23-246 of the omap4 TRM. in serial_omap_rlsi()
494 if ((up->port.rs485.flags & SER_RS485_ENABLED) && in serial_omap_rlsi()
495 !(up->port.rs485.flags & SER_RS485_RX_DURING_TX) && in serial_omap_rlsi()
496 up->rs485_tx_filter_count) in serial_omap_rlsi()
497 up->rs485_tx_filter_count--; in serial_omap_rlsi()
500 up->port.icount.rx++; in serial_omap_rlsi()
506 up->port.icount.brk++; in serial_omap_rlsi()
513 if (uart_handle_break(&up->port)) in serial_omap_rlsi()
520 up->port.icount.parity++; in serial_omap_rlsi()
525 up->port.icount.frame++; in serial_omap_rlsi()
529 up->port.icount.overrun++; in serial_omap_rlsi()
532 if (up->port.line == up->port.cons->index) { in serial_omap_rlsi()
534 lsr |= up->lsr_break_flag; in serial_omap_rlsi()
537 uart_insert_char(&up->port, lsr, UART_LSR_OE, 0, flag); in serial_omap_rlsi()
549 if ((up->port.rs485.flags & SER_RS485_ENABLED) && in serial_omap_rdi()
550 !(up->port.rs485.flags & SER_RS485_RX_DURING_TX) && in serial_omap_rdi()
551 up->rs485_tx_filter_count) { in serial_omap_rdi()
552 up->rs485_tx_filter_count--; in serial_omap_rdi()
557 up->port.icount.rx++; in serial_omap_rdi()
559 if (uart_handle_sysrq_char(&up->port, ch)) in serial_omap_rdi()
562 uart_insert_char(&up->port, lsr, UART_LSR_OE, ch, flag); in serial_omap_rdi()
566 * serial_omap_irq() - This handles the interrupt from one port
578 spin_lock(&up->port.lock); in serial_omap_irq()
579 pm_runtime_get_sync(up->dev); in serial_omap_irq()
613 } while (max_count--); in serial_omap_irq()
615 spin_unlock(&up->port.lock); in serial_omap_irq()
617 tty_flip_buffer_push(&up->port.state->port); in serial_omap_irq()
619 pm_runtime_mark_last_busy(up->dev); in serial_omap_irq()
620 pm_runtime_put_autosuspend(up->dev); in serial_omap_irq()
621 up->port_activity = jiffies; in serial_omap_irq()
632 pm_runtime_get_sync(up->dev); in serial_omap_tx_empty()
633 dev_dbg(up->port.dev, "serial_omap_tx_empty+%d\n", up->port.line); in serial_omap_tx_empty()
634 spin_lock_irqsave(&up->port.lock, flags); in serial_omap_tx_empty()
636 spin_unlock_irqrestore(&up->port.lock, flags); in serial_omap_tx_empty()
637 pm_runtime_mark_last_busy(up->dev); in serial_omap_tx_empty()
638 pm_runtime_put_autosuspend(up->dev); in serial_omap_tx_empty()
648 pm_runtime_get_sync(up->dev); in serial_omap_get_mctrl()
650 pm_runtime_mark_last_busy(up->dev); in serial_omap_get_mctrl()
651 pm_runtime_put_autosuspend(up->dev); in serial_omap_get_mctrl()
653 dev_dbg(up->port.dev, "serial_omap_get_mctrl+%d\n", up->port.line); in serial_omap_get_mctrl()
671 dev_dbg(up->port.dev, "serial_omap_set_mctrl+%d\n", up->port.line); in serial_omap_set_mctrl()
683 pm_runtime_get_sync(up->dev); in serial_omap_set_mctrl()
687 up->mcr = old_mcr | mcr; in serial_omap_set_mctrl()
688 serial_out(up, UART_MCR, up->mcr); in serial_omap_set_mctrl()
690 /* Turn off autoRTS if RTS is lowered; restore autoRTS if RTS raised */ in serial_omap_set_mctrl()
693 if ((mctrl & TIOCM_RTS) && (port->status & UPSTAT_AUTORTS)) in serial_omap_set_mctrl()
694 up->efr |= UART_EFR_RTS; in serial_omap_set_mctrl()
696 up->efr &= ~UART_EFR_RTS; in serial_omap_set_mctrl()
697 serial_out(up, UART_EFR, up->efr); in serial_omap_set_mctrl()
700 pm_runtime_mark_last_busy(up->dev); in serial_omap_set_mctrl()
701 pm_runtime_put_autosuspend(up->dev); in serial_omap_set_mctrl()
709 dev_dbg(up->port.dev, "serial_omap_break_ctl+%d\n", up->port.line); in serial_omap_break_ctl()
710 pm_runtime_get_sync(up->dev); in serial_omap_break_ctl()
711 spin_lock_irqsave(&up->port.lock, flags); in serial_omap_break_ctl()
712 if (break_state == -1) in serial_omap_break_ctl()
713 up->lcr |= UART_LCR_SBC; in serial_omap_break_ctl()
715 up->lcr &= ~UART_LCR_SBC; in serial_omap_break_ctl()
716 serial_out(up, UART_LCR, up->lcr); in serial_omap_break_ctl()
717 spin_unlock_irqrestore(&up->port.lock, flags); in serial_omap_break_ctl()
718 pm_runtime_mark_last_busy(up->dev); in serial_omap_break_ctl()
719 pm_runtime_put_autosuspend(up->dev); in serial_omap_break_ctl()
731 retval = request_irq(up->port.irq, serial_omap_irq, up->port.irqflags, in serial_omap_startup()
732 up->name, up); in serial_omap_startup()
736 /* Optional wake-up IRQ */ in serial_omap_startup()
737 if (up->wakeirq) { in serial_omap_startup()
738 retval = dev_pm_set_dedicated_wake_irq(up->dev, up->wakeirq); in serial_omap_startup()
740 free_irq(up->port.irq, up); in serial_omap_startup()
745 dev_dbg(up->port.dev, "serial_omap_startup+%d\n", up->port.line); in serial_omap_startup()
747 pm_runtime_get_sync(up->dev); in serial_omap_startup()
767 spin_lock_irqsave(&up->port.lock, flags); in serial_omap_startup()
771 up->port.mctrl |= TIOCM_OUT2; in serial_omap_startup()
772 serial_omap_set_mctrl(&up->port, up->port.mctrl); in serial_omap_startup()
773 spin_unlock_irqrestore(&up->port.lock, flags); in serial_omap_startup()
775 up->msr_saved_flags = 0; in serial_omap_startup()
781 up->ier = UART_IER_RLSI | UART_IER_RDI; in serial_omap_startup()
782 serial_out(up, UART_IER, up->ier); in serial_omap_startup()
785 up->wer = OMAP_UART_WER_MOD_WKUP; in serial_omap_startup()
786 if (up->features & OMAP_UART_WER_HAS_TX_WAKEUP) in serial_omap_startup()
787 up->wer |= OMAP_UART_TX_WAKEUP_EN; in serial_omap_startup()
789 serial_out(up, UART_OMAP_WER, up->wer); in serial_omap_startup()
791 pm_runtime_mark_last_busy(up->dev); in serial_omap_startup()
792 pm_runtime_put_autosuspend(up->dev); in serial_omap_startup()
793 up->port_activity = jiffies; in serial_omap_startup()
802 dev_dbg(up->port.dev, "serial_omap_shutdown+%d\n", up->port.line); in serial_omap_shutdown()
804 pm_runtime_get_sync(up->dev); in serial_omap_shutdown()
808 up->ier = 0; in serial_omap_shutdown()
811 spin_lock_irqsave(&up->port.lock, flags); in serial_omap_shutdown()
812 up->port.mctrl &= ~TIOCM_OUT2; in serial_omap_shutdown()
813 serial_omap_set_mctrl(&up->port, up->port.mctrl); in serial_omap_shutdown()
814 spin_unlock_irqrestore(&up->port.lock, flags); in serial_omap_shutdown()
828 pm_runtime_mark_last_busy(up->dev); in serial_omap_shutdown()
829 pm_runtime_put_autosuspend(up->dev); in serial_omap_shutdown()
830 free_irq(up->port.irq, up); in serial_omap_shutdown()
831 dev_pm_clear_wake_irq(up->dev); in serial_omap_shutdown()
839 cpu_latency_qos_update_request(&up->pm_qos_request, up->latency); in serial_omap_uart_qos_work()
851 switch (termios->c_cflag & CSIZE) { in serial_omap_set_termios()
867 if (termios->c_cflag & CSTOPB) in serial_omap_set_termios()
869 if (termios->c_cflag & PARENB) in serial_omap_set_termios()
871 if (!(termios->c_cflag & PARODD)) in serial_omap_set_termios()
873 if (termios->c_cflag & CMSPAR) in serial_omap_set_termios()
880 baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/13); in serial_omap_set_termios()
884 up->calc_latency = (USEC_PER_SEC * up->port.fifosize) / (baud / 8); in serial_omap_set_termios()
885 up->latency = up->calc_latency; in serial_omap_set_termios()
886 schedule_work(&up->qos_work); in serial_omap_set_termios()
888 up->dll = quot & 0xff; in serial_omap_set_termios()
889 up->dlh = quot >> 8; in serial_omap_set_termios()
890 up->mdr1 = UART_OMAP_MDR1_DISABLE; in serial_omap_set_termios()
892 up->fcr = UART_FCR_R_TRIG_01 | UART_FCR_T_TRIG_01 | in serial_omap_set_termios()
899 pm_runtime_get_sync(up->dev); in serial_omap_set_termios()
900 spin_lock_irqsave(&up->port.lock, flags); in serial_omap_set_termios()
903 * Update the per-port timeout. in serial_omap_set_termios()
905 uart_update_timeout(port, termios->c_cflag, baud); in serial_omap_set_termios()
907 up->port.read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR; in serial_omap_set_termios()
908 if (termios->c_iflag & INPCK) in serial_omap_set_termios()
909 up->port.read_status_mask |= UART_LSR_FE | UART_LSR_PE; in serial_omap_set_termios()
910 if (termios->c_iflag & (BRKINT | PARMRK)) in serial_omap_set_termios()
911 up->port.read_status_mask |= UART_LSR_BI; in serial_omap_set_termios()
916 up->port.ignore_status_mask = 0; in serial_omap_set_termios()
917 if (termios->c_iflag & IGNPAR) in serial_omap_set_termios()
918 up->port.ignore_status_mask |= UART_LSR_PE | UART_LSR_FE; in serial_omap_set_termios()
919 if (termios->c_iflag & IGNBRK) { in serial_omap_set_termios()
920 up->port.ignore_status_mask |= UART_LSR_BI; in serial_omap_set_termios()
925 if (termios->c_iflag & IGNPAR) in serial_omap_set_termios()
926 up->port.ignore_status_mask |= UART_LSR_OE; in serial_omap_set_termios()
932 if ((termios->c_cflag & CREAD) == 0) in serial_omap_set_termios()
933 up->port.ignore_status_mask |= UART_LSR_DR; in serial_omap_set_termios()
938 up->ier &= ~UART_IER_MSI; in serial_omap_set_termios()
939 if (UART_ENABLE_MS(&up->port, termios->c_cflag)) in serial_omap_set_termios()
940 up->ier |= UART_IER_MSI; in serial_omap_set_termios()
941 serial_out(up, UART_IER, up->ier); in serial_omap_set_termios()
943 up->lcr = cval; in serial_omap_set_termios()
944 up->scr = 0; in serial_omap_set_termios()
959 up->efr = serial_in(up, UART_EFR) & ~UART_EFR_ECB; in serial_omap_set_termios()
960 up->efr &= ~UART_EFR_SCD; in serial_omap_set_termios()
961 serial_out(up, UART_EFR, up->efr | UART_EFR_ECB); in serial_omap_set_termios()
964 up->mcr = serial_in(up, UART_MCR) & ~UART_MCR_TCRTLR; in serial_omap_set_termios()
965 serial_out(up, UART_MCR, up->mcr | UART_MCR_TCRTLR); in serial_omap_set_termios()
968 up->scr |= OMAP_UART_SCR_RX_TRIG_GRANU1_MASK; in serial_omap_set_termios()
982 up->fcr &= ~OMAP_UART_FCR_RX_FIFO_TRIG_MASK; in serial_omap_set_termios()
983 up->fcr &= ~OMAP_UART_FCR_TX_FIFO_TRIG_MASK; in serial_omap_set_termios()
984 up->fcr |= UART_FCR6_R_TRIGGER_16 | UART_FCR6_T_TRIGGER_24 | in serial_omap_set_termios()
987 serial_out(up, UART_FCR, up->fcr); in serial_omap_set_termios()
990 serial_out(up, UART_OMAP_SCR, up->scr); in serial_omap_set_termios()
994 serial_out(up, UART_MCR, up->mcr); in serial_omap_set_termios()
996 serial_out(up, UART_EFR, up->efr); in serial_omap_set_termios()
1001 if (up->errata & UART_ERRATA_i202_MDR1_ACCESS) in serial_omap_set_termios()
1002 serial_omap_mdr1_errataset(up, up->mdr1); in serial_omap_set_termios()
1004 serial_out(up, UART_OMAP_MDR1, up->mdr1); in serial_omap_set_termios()
1007 serial_out(up, UART_EFR, up->efr | UART_EFR_ECB); in serial_omap_set_termios()
1013 serial_out(up, UART_DLL, up->dll); /* LS of divisor */ in serial_omap_set_termios()
1014 serial_out(up, UART_DLM, up->dlh); /* MS of divisor */ in serial_omap_set_termios()
1017 serial_out(up, UART_IER, up->ier); in serial_omap_set_termios()
1020 serial_out(up, UART_EFR, up->efr); in serial_omap_set_termios()
1024 up->mdr1 = UART_OMAP_MDR1_13X_MODE; in serial_omap_set_termios()
1026 up->mdr1 = UART_OMAP_MDR1_16X_MODE; in serial_omap_set_termios()
1028 if (up->errata & UART_ERRATA_i202_MDR1_ACCESS) in serial_omap_set_termios()
1029 serial_omap_mdr1_errataset(up, up->mdr1); in serial_omap_set_termios()
1031 serial_out(up, UART_OMAP_MDR1, up->mdr1); in serial_omap_set_termios()
1037 serial_out(up, UART_XON1, termios->c_cc[VSTART]); in serial_omap_set_termios()
1038 serial_out(up, UART_XOFF1, termios->c_cc[VSTOP]); in serial_omap_set_termios()
1041 serial_out(up, UART_EFR, up->efr | UART_EFR_ECB); in serial_omap_set_termios()
1043 serial_out(up, UART_MCR, up->mcr | UART_MCR_TCRTLR); in serial_omap_set_termios()
1047 up->port.status &= ~(UPSTAT_AUTOCTS | UPSTAT_AUTORTS | UPSTAT_AUTOXOFF); in serial_omap_set_termios()
1049 if (termios->c_cflag & CRTSCTS && up->port.flags & UPF_HARD_FLOW) { in serial_omap_set_termios()
1050 /* Enable AUTOCTS (autoRTS is enabled when RTS is raised) */ in serial_omap_set_termios()
1051 up->port.status |= UPSTAT_AUTOCTS | UPSTAT_AUTORTS; in serial_omap_set_termios()
1052 up->efr |= UART_EFR_CTS; in serial_omap_set_termios()
1055 up->efr &= ~(UART_EFR_CTS | UART_EFR_RTS); in serial_omap_set_termios()
1058 if (up->port.flags & UPF_SOFT_FLOW) { in serial_omap_set_termios()
1060 up->efr &= OMAP_UART_SW_CLR; in serial_omap_set_termios()
1067 if (termios->c_iflag & IXON) in serial_omap_set_termios()
1068 up->efr |= OMAP_UART_SW_RX; in serial_omap_set_termios()
1075 if (termios->c_iflag & IXOFF) { in serial_omap_set_termios()
1076 up->port.status |= UPSTAT_AUTOXOFF; in serial_omap_set_termios()
1077 up->efr |= OMAP_UART_SW_TX; in serial_omap_set_termios()
1086 if (termios->c_iflag & IXANY) in serial_omap_set_termios()
1087 up->mcr |= UART_MCR_XONANY; in serial_omap_set_termios()
1089 up->mcr &= ~UART_MCR_XONANY; in serial_omap_set_termios()
1091 serial_out(up, UART_MCR, up->mcr); in serial_omap_set_termios()
1093 serial_out(up, UART_EFR, up->efr); in serial_omap_set_termios()
1094 serial_out(up, UART_LCR, up->lcr); in serial_omap_set_termios()
1096 serial_omap_set_mctrl(&up->port, up->port.mctrl); in serial_omap_set_termios()
1098 spin_unlock_irqrestore(&up->port.lock, flags); in serial_omap_set_termios()
1099 pm_runtime_mark_last_busy(up->dev); in serial_omap_set_termios()
1100 pm_runtime_put_autosuspend(up->dev); in serial_omap_set_termios()
1101 dev_dbg(up->port.dev, "serial_omap_set_termios+%d\n", up->port.line); in serial_omap_set_termios()
1111 dev_dbg(up->port.dev, "serial_omap_pm+%d\n", up->port.line); in serial_omap_pm()
1113 pm_runtime_get_sync(up->dev); in serial_omap_pm()
1124 pm_runtime_mark_last_busy(up->dev); in serial_omap_pm()
1125 pm_runtime_put_autosuspend(up->dev); in serial_omap_pm()
1130 dev_dbg(port->dev, "serial_omap_release_port+\n"); in serial_omap_release_port()
1135 dev_dbg(port->dev, "serial_omap_request_port+\n"); in serial_omap_request_port()
1143 dev_dbg(up->port.dev, "serial_omap_config_port+%d\n", in serial_omap_config_port()
1144 up->port.line); in serial_omap_config_port()
1145 up->port.type = PORT_OMAP; in serial_omap_config_port()
1146 up->port.flags |= UPF_SOFT_FLOW | UPF_HARD_FLOW; in serial_omap_config_port()
1153 dev_dbg(port->dev, "serial_omap_verify_port+\n"); in serial_omap_verify_port()
1154 return -EINVAL; in serial_omap_verify_port()
1162 dev_dbg(up->port.dev, "serial_omap_type+%d\n", up->port.line); in serial_omap_type()
1163 return up->name; in serial_omap_type()
1177 up->lsr_break_flag = UART_LSR_BI; in wait_for_xmitr()
1179 if (--tmout == 0) in wait_for_xmitr()
1185 if (up->port.flags & UPF_CONS_FLOW) { in wait_for_xmitr()
1187 for (tmout = 1000000; tmout; tmout--) { in wait_for_xmitr()
1190 up->msr_saved_flags |= msr & MSR_SAVE_FLAGS; in wait_for_xmitr()
1205 pm_runtime_get_sync(up->dev); in serial_omap_poll_put_char()
1208 pm_runtime_mark_last_busy(up->dev); in serial_omap_poll_put_char()
1209 pm_runtime_put_autosuspend(up->dev); in serial_omap_poll_put_char()
1217 pm_runtime_get_sync(up->dev); in serial_omap_poll_get_char()
1227 pm_runtime_mark_last_busy(up->dev); in serial_omap_poll_get_char()
1228 pm_runtime_put_autosuspend(up->dev); in serial_omap_poll_get_char()
1240 offset <<= port->regshift; in omap_serial_early_in()
1241 return readw(port->membase + offset); in omap_serial_early_in()
1247 offset <<= port->regshift; in omap_serial_early_out()
1248 writew(value, port->membase + offset); in omap_serial_early_out()
1267 struct earlycon_device *device = console->data; in early_omap_serial_write()
1268 struct uart_port *port = &device->port; in early_omap_serial_write()
1276 struct uart_port *port = &device->port; in early_omap_serial_setup()
1278 if (!(device->port.membase || device->port.iobase)) in early_omap_serial_setup()
1279 return -ENODEV; in early_omap_serial_setup()
1281 port->regshift = 2; in early_omap_serial_setup()
1282 device->con->write = early_omap_serial_write; in early_omap_serial_setup()
1286 OF_EARLYCON_DECLARE(omapserial, "ti,omap2-uart", early_omap_serial_setup);
1287 OF_EARLYCON_DECLARE(omapserial, "ti,omap3-uart", early_omap_serial_setup);
1288 OF_EARLYCON_DECLARE(omapserial, "ti,omap4-uart", early_omap_serial_setup);
1307 struct uart_omap_port *up = serial_omap_console_ports[co->index]; in serial_omap_console_write()
1312 pm_runtime_get_sync(up->dev); in serial_omap_console_write()
1315 if (up->port.sysrq) in serial_omap_console_write()
1318 locked = spin_trylock(&up->port.lock); in serial_omap_console_write()
1320 spin_lock(&up->port.lock); in serial_omap_console_write()
1328 uart_console_write(&up->port, s, count, serial_omap_console_putchar); in serial_omap_console_write()
1343 if (up->msr_saved_flags) in serial_omap_console_write()
1346 pm_runtime_mark_last_busy(up->dev); in serial_omap_console_write()
1347 pm_runtime_put_autosuspend(up->dev); in serial_omap_console_write()
1349 spin_unlock(&up->port.lock); in serial_omap_console_write()
1362 if (serial_omap_console_ports[co->index] == NULL) in serial_omap_console_setup()
1363 return -ENODEV; in serial_omap_console_setup()
1364 up = serial_omap_console_ports[co->index]; in serial_omap_console_setup()
1369 return uart_set_options(&up->port, co, baud, parity, bits, flow); in serial_omap_console_setup()
1378 .index = -1,
1384 serial_omap_console_ports[up->port.line] = up; in serial_omap_add_console_port()
1398 /* Enable or disable the rs485 support */
1400 serial_omap_config_rs485(struct uart_port *port, struct serial_rs485 *rs485) in serial_omap_config_rs485() argument
1406 pm_runtime_get_sync(up->dev); in serial_omap_config_rs485()
1409 mode = up->ier; in serial_omap_config_rs485()
1410 up->ier = 0; in serial_omap_config_rs485()
1414 rs485->delay_rts_before_send = min(rs485->delay_rts_before_send, 100U); in serial_omap_config_rs485()
1415 rs485->delay_rts_after_send = min(rs485->delay_rts_after_send, 100U); in serial_omap_config_rs485()
1418 port->rs485 = *rs485; in serial_omap_config_rs485()
1420 if (up->rts_gpiod) { in serial_omap_config_rs485()
1421 /* enable / disable rts */ in serial_omap_config_rs485()
1422 val = (port->rs485.flags & SER_RS485_ENABLED) ? in serial_omap_config_rs485()
1424 val = (port->rs485.flags & val) ? 1 : 0; in serial_omap_config_rs485()
1425 gpiod_set_value(up->rts_gpiod, val); in serial_omap_config_rs485()
1429 up->ier = mode; in serial_omap_config_rs485()
1430 serial_out(up, UART_IER, up->ier); in serial_omap_config_rs485()
1432 /* If RS-485 is disabled, make sure the THR interrupt is fired when in serial_omap_config_rs485()
1435 if (!(port->rs485.flags & SER_RS485_ENABLED) && in serial_omap_config_rs485()
1436 (up->scr & OMAP_UART_SCR_TX_EMPTY)) { in serial_omap_config_rs485()
1437 up->scr &= ~OMAP_UART_SCR_TX_EMPTY; in serial_omap_config_rs485()
1438 serial_out(up, UART_OMAP_SCR, up->scr); in serial_omap_config_rs485()
1441 pm_runtime_mark_last_busy(up->dev); in serial_omap_config_rs485()
1442 pm_runtime_put_autosuspend(up->dev); in serial_omap_config_rs485()
1475 .driver_name = "OMAP-SERIAL",
1486 up->is_suspending = true; in serial_omap_prepare()
1495 up->is_suspending = false; in serial_omap_complete()
1502 uart_suspend_port(&serial_omap_reg, &up->port); in serial_omap_suspend()
1503 flush_work(&up->qos_work); in serial_omap_suspend()
1520 uart_resume_port(&serial_omap_reg, &up->port); in serial_omap_resume()
1534 mvr = readl(up->port.membase + (UART_OMAP_MVER << up->port.regshift)); in omap_serial_fill_features_erratas()
1554 dev_warn(up->dev, in omap_serial_fill_features_erratas()
1556 up->name); in omap_serial_fill_features_erratas()
1567 up->errata |= (UART_ERRATA_i202_MDR1_ACCESS | in omap_serial_fill_features_erratas()
1571 up->errata |= (UART_ERRATA_i202_MDR1_ACCESS | in omap_serial_fill_features_erratas()
1573 up->features |= OMAP_UART_WER_HAS_TX_WAKEUP; in omap_serial_fill_features_erratas()
1576 up->errata |= UART_ERRATA_i202_MDR1_ACCESS; in omap_serial_fill_features_erratas()
1577 up->features |= OMAP_UART_WER_HAS_TX_WAKEUP; in omap_serial_fill_features_erratas()
1592 of_property_read_u32(dev->of_node, "clock-frequency", in of_get_uart_port_info()
1593 &omap_up_info->uartclk); in of_get_uart_port_info()
1595 omap_up_info->flags = UPF_BOOT_AUTOCONF; in of_get_uart_port_info()
1603 struct serial_rs485 *rs485conf = &up->port.rs485; in serial_omap_probe_rs485()
1604 struct device_node *np = dev->of_node; in serial_omap_probe_rs485()
1608 rs485conf->flags = 0; in serial_omap_probe_rs485()
1609 up->rts_gpiod = NULL; in serial_omap_probe_rs485()
1614 ret = uart_get_rs485_mode(&up->port); in serial_omap_probe_rs485()
1618 if (of_property_read_bool(np, "rs485-rts-active-high")) { in serial_omap_probe_rs485()
1619 rs485conf->flags |= SER_RS485_RTS_ON_SEND; in serial_omap_probe_rs485()
1620 rs485conf->flags &= ~SER_RS485_RTS_AFTER_SEND; in serial_omap_probe_rs485()
1622 rs485conf->flags &= ~SER_RS485_RTS_ON_SEND; in serial_omap_probe_rs485()
1623 rs485conf->flags |= SER_RS485_RTS_AFTER_SEND; in serial_omap_probe_rs485()
1627 gflags = rs485conf->flags & SER_RS485_RTS_AFTER_SEND ? in serial_omap_probe_rs485()
1629 up->rts_gpiod = devm_gpiod_get_optional(dev, "rts", gflags); in serial_omap_probe_rs485()
1630 if (IS_ERR(up->rts_gpiod)) { in serial_omap_probe_rs485()
1631 ret = PTR_ERR(up->rts_gpiod); in serial_omap_probe_rs485()
1632 if (ret == -EPROBE_DEFER) in serial_omap_probe_rs485()
1636 * -EPROBE_DEFER and just went on without GPIO. in serial_omap_probe_rs485()
1638 up->rts_gpiod = NULL; in serial_omap_probe_rs485()
1640 gpiod_set_consumer_name(up->rts_gpiod, "omap-serial"); in serial_omap_probe_rs485()
1648 struct omap_uart_port_info *omap_up_info = dev_get_platdata(&pdev->dev); in serial_omap_probe()
1657 if (pdev->dev.of_node) { in serial_omap_probe()
1658 uartirq = irq_of_parse_and_map(pdev->dev.of_node, 0); in serial_omap_probe()
1660 return -EPROBE_DEFER; in serial_omap_probe()
1661 wakeirq = irq_of_parse_and_map(pdev->dev.of_node, 1); in serial_omap_probe()
1662 omap_up_info = of_get_uart_port_info(&pdev->dev); in serial_omap_probe()
1663 pdev->dev.platform_data = omap_up_info; in serial_omap_probe()
1667 return -EPROBE_DEFER; in serial_omap_probe()
1670 up = devm_kzalloc(&pdev->dev, sizeof(*up), GFP_KERNEL); in serial_omap_probe()
1672 return -ENOMEM; in serial_omap_probe()
1675 base = devm_ioremap_resource(&pdev->dev, mem); in serial_omap_probe()
1679 up->dev = &pdev->dev; in serial_omap_probe()
1680 up->port.dev = &pdev->dev; in serial_omap_probe()
1681 up->port.type = PORT_OMAP; in serial_omap_probe()
1682 up->port.iotype = UPIO_MEM; in serial_omap_probe()
1683 up->port.irq = uartirq; in serial_omap_probe()
1684 up->port.regshift = 2; in serial_omap_probe()
1685 up->port.fifosize = 64; in serial_omap_probe()
1686 up->port.ops = &serial_omap_pops; in serial_omap_probe()
1687 up->port.has_sysrq = IS_ENABLED(CONFIG_SERIAL_OMAP_CONSOLE); in serial_omap_probe()
1689 if (pdev->dev.of_node) in serial_omap_probe()
1690 ret = of_alias_get_id(pdev->dev.of_node, "serial"); in serial_omap_probe()
1692 ret = pdev->id; in serial_omap_probe()
1695 dev_err(&pdev->dev, "failed to get alias/pdev id, errno %d\n", in serial_omap_probe()
1699 up->port.line = ret; in serial_omap_probe()
1701 if (up->port.line >= OMAP_MAX_HSUART_PORTS) { in serial_omap_probe()
1702 dev_err(&pdev->dev, "uart ID %d > MAX %d.\n", up->port.line, in serial_omap_probe()
1704 ret = -ENXIO; in serial_omap_probe()
1708 up->wakeirq = wakeirq; in serial_omap_probe()
1709 if (!up->wakeirq) in serial_omap_probe()
1710 dev_info(up->port.dev, "no wakeirq for uart%d\n", in serial_omap_probe()
1711 up->port.line); in serial_omap_probe()
1713 ret = serial_omap_probe_rs485(up, &pdev->dev); in serial_omap_probe()
1717 sprintf(up->name, "OMAP UART%d", up->port.line); in serial_omap_probe()
1718 up->port.mapbase = mem->start; in serial_omap_probe()
1719 up->port.membase = base; in serial_omap_probe()
1720 up->port.flags = omap_up_info->flags; in serial_omap_probe()
1721 up->port.uartclk = omap_up_info->uartclk; in serial_omap_probe()
1722 up->port.rs485_config = serial_omap_config_rs485; in serial_omap_probe()
1723 if (!up->port.uartclk) { in serial_omap_probe()
1724 up->port.uartclk = DEFAULT_CLK_SPEED; in serial_omap_probe()
1725 dev_warn(&pdev->dev, in serial_omap_probe()
1730 up->latency = PM_QOS_CPU_LATENCY_DEFAULT_VALUE; in serial_omap_probe()
1731 up->calc_latency = PM_QOS_CPU_LATENCY_DEFAULT_VALUE; in serial_omap_probe()
1732 cpu_latency_qos_add_request(&up->pm_qos_request, up->latency); in serial_omap_probe()
1733 INIT_WORK(&up->qos_work, serial_omap_uart_qos_work); in serial_omap_probe()
1736 if (omap_up_info->autosuspend_timeout == 0) in serial_omap_probe()
1737 omap_up_info->autosuspend_timeout = -1; in serial_omap_probe()
1739 device_init_wakeup(up->dev, true); in serial_omap_probe()
1740 pm_runtime_use_autosuspend(&pdev->dev); in serial_omap_probe()
1741 pm_runtime_set_autosuspend_delay(&pdev->dev, in serial_omap_probe()
1742 omap_up_info->autosuspend_timeout); in serial_omap_probe()
1744 pm_runtime_irq_safe(&pdev->dev); in serial_omap_probe()
1745 pm_runtime_enable(&pdev->dev); in serial_omap_probe()
1747 pm_runtime_get_sync(&pdev->dev); in serial_omap_probe()
1751 ui[up->port.line] = up; in serial_omap_probe()
1754 ret = uart_add_one_port(&serial_omap_reg, &up->port); in serial_omap_probe()
1758 pm_runtime_mark_last_busy(up->dev); in serial_omap_probe()
1759 pm_runtime_put_autosuspend(up->dev); in serial_omap_probe()
1763 pm_runtime_dont_use_autosuspend(&pdev->dev); in serial_omap_probe()
1764 pm_runtime_put_sync(&pdev->dev); in serial_omap_probe()
1765 pm_runtime_disable(&pdev->dev); in serial_omap_probe()
1766 cpu_latency_qos_remove_request(&up->pm_qos_request); in serial_omap_probe()
1767 device_init_wakeup(up->dev, false); in serial_omap_probe()
1777 pm_runtime_get_sync(up->dev); in serial_omap_remove()
1779 uart_remove_one_port(&serial_omap_reg, &up->port); in serial_omap_remove()
1781 pm_runtime_dont_use_autosuspend(up->dev); in serial_omap_remove()
1782 pm_runtime_put_sync(up->dev); in serial_omap_remove()
1783 pm_runtime_disable(up->dev); in serial_omap_remove()
1784 cpu_latency_qos_remove_request(&up->pm_qos_request); in serial_omap_remove()
1785 device_init_wakeup(&dev->dev, false); in serial_omap_remove()
1795 * Need a delay =
1805 serial_out(up, UART_FCR, up->fcr | UART_FCR_CLEAR_XMIT | in serial_omap_mdr1_errataset()
1813 timeout--; in serial_omap_mdr1_errataset()
1816 dev_crit(up->dev, "Errata i202: timedout %x\n", in serial_omap_mdr1_errataset()
1827 if (up->errata & UART_ERRATA_i202_MDR1_ACCESS) in serial_omap_restore_context()
1837 serial_out(up, UART_DLL, up->dll); in serial_omap_restore_context()
1838 serial_out(up, UART_DLM, up->dlh); in serial_omap_restore_context()
1840 serial_out(up, UART_IER, up->ier); in serial_omap_restore_context()
1841 serial_out(up, UART_FCR, up->fcr); in serial_omap_restore_context()
1843 serial_out(up, UART_MCR, up->mcr); in serial_omap_restore_context()
1845 serial_out(up, UART_OMAP_SCR, up->scr); in serial_omap_restore_context()
1846 serial_out(up, UART_EFR, up->efr); in serial_omap_restore_context()
1847 serial_out(up, UART_LCR, up->lcr); in serial_omap_restore_context()
1848 if (up->errata & UART_ERRATA_i202_MDR1_ACCESS) in serial_omap_restore_context()
1849 serial_omap_mdr1_errataset(up, up->mdr1); in serial_omap_restore_context()
1851 serial_out(up, UART_OMAP_MDR1, up->mdr1); in serial_omap_restore_context()
1852 serial_out(up, UART_OMAP_WER, up->wer); in serial_omap_restore_context()
1860 return -EINVAL; in serial_omap_runtime_suspend()
1868 if (up->is_suspending && !console_suspend_enabled && in serial_omap_runtime_suspend()
1869 uart_console(&up->port)) in serial_omap_runtime_suspend()
1870 return -EBUSY; in serial_omap_runtime_suspend()
1872 up->context_loss_cnt = serial_omap_get_context_loss_count(up); in serial_omap_runtime_suspend()
1876 up->latency = PM_QOS_CPU_LATENCY_DEFAULT_VALUE; in serial_omap_runtime_suspend()
1877 schedule_work(&up->qos_work); in serial_omap_runtime_suspend()
1894 } else if (up->context_loss_cnt != loss_cnt) { in serial_omap_runtime_resume()
1897 up->latency = up->calc_latency; in serial_omap_runtime_resume()
1898 schedule_work(&up->qos_work); in serial_omap_runtime_resume()
1914 { .compatible = "ti,omap2-uart" },
1915 { .compatible = "ti,omap3-uart" },
1916 { .compatible = "ti,omap4-uart" },