stm32-usart.c (c13aca79ff3c4af5fd31a5b2743a90eba6e36a26) stm32-usart.c (c8a9d043947b4acb19a65f7fac2bd0893e581cd5)
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) Maxime Coquelin 2015
4 * Copyright (C) STMicroelectronics SA 2017
5 * Authors: Maxime Coquelin <mcoquelin.stm32@gmail.com>
6 * Gerald Baeza <gerald.baeza@st.com>
7 *
8 * Inspired by st-asc.c from STMicroelectronics (c)

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594 if (stm32_port->fifoen)
595 val |= USART_CR1_FIFOEN;
596 stm32_clr_bits(port, ofs->cr1, val);
597
598 dev_pm_clear_wake_irq(port->dev);
599 free_irq(port->irq, port);
600}
601
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) Maxime Coquelin 2015
4 * Copyright (C) STMicroelectronics SA 2017
5 * Authors: Maxime Coquelin <mcoquelin.stm32@gmail.com>
6 * Gerald Baeza <gerald.baeza@st.com>
7 *
8 * Inspired by st-asc.c from STMicroelectronics (c)

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594 if (stm32_port->fifoen)
595 val |= USART_CR1_FIFOEN;
596 stm32_clr_bits(port, ofs->cr1, val);
597
598 dev_pm_clear_wake_irq(port->dev);
599 free_irq(port->irq, port);
600}
601
602unsigned int stm32_get_databits(struct ktermios *termios)
603{
604 unsigned int bits;
605
606 tcflag_t cflag = termios->c_cflag;
607
608 switch (cflag & CSIZE) {
609 /*
610 * CSIZE settings are not necessarily supported in hardware.
611 * CSIZE unsupported configurations are handled here to set word length
612 * to 8 bits word as default configuration and to print debug message.
613 */
614 case CS5:
615 bits = 5;
616 break;
617 case CS6:
618 bits = 6;
619 break;
620 case CS7:
621 bits = 7;
622 break;
623 /* default including CS8 */
624 default:
625 bits = 8;
626 break;
627 }
628
629 return bits;
630}
631
602static void stm32_set_termios(struct uart_port *port, struct ktermios *termios,
603 struct ktermios *old)
604{
605 struct stm32_port *stm32_port = to_stm32_port(port);
606 struct stm32_usart_offsets *ofs = &stm32_port->info->ofs;
607 struct stm32_usart_config *cfg = &stm32_port->info->cfg;
608 struct serial_rs485 *rs485conf = &port->rs485;
632static void stm32_set_termios(struct uart_port *port, struct ktermios *termios,
633 struct ktermios *old)
634{
635 struct stm32_port *stm32_port = to_stm32_port(port);
636 struct stm32_usart_offsets *ofs = &stm32_port->info->ofs;
637 struct stm32_usart_config *cfg = &stm32_port->info->cfg;
638 struct serial_rs485 *rs485conf = &port->rs485;
609 unsigned int baud;
639 unsigned int baud, bits;
610 u32 usartdiv, mantissa, fraction, oversampling;
611 tcflag_t cflag = termios->c_cflag;
612 u32 cr1, cr2, cr3;
613 unsigned long flags;
614
615 if (!stm32_port->hw_flow_control)
616 cflag &= ~CRTSCTS;
617

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627 if (stm32_port->fifoen)
628 cr1 |= USART_CR1_FIFOEN;
629 cr2 = 0;
630 cr3 = 0;
631
632 if (cflag & CSTOPB)
633 cr2 |= USART_CR2_STOP_2B;
634
640 u32 usartdiv, mantissa, fraction, oversampling;
641 tcflag_t cflag = termios->c_cflag;
642 u32 cr1, cr2, cr3;
643 unsigned long flags;
644
645 if (!stm32_port->hw_flow_control)
646 cflag &= ~CRTSCTS;
647

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657 if (stm32_port->fifoen)
658 cr1 |= USART_CR1_FIFOEN;
659 cr2 = 0;
660 cr3 = 0;
661
662 if (cflag & CSTOPB)
663 cr2 |= USART_CR2_STOP_2B;
664
665 bits = stm32_get_databits(termios);
666
635 if (cflag & PARENB) {
667 if (cflag & PARENB) {
668 bits++;
636 cr1 |= USART_CR1_PCE;
669 cr1 |= USART_CR1_PCE;
637 if ((cflag & CSIZE) == CS8) {
638 if (cfg->has_7bits_data)
639 cr1 |= USART_CR1_M0;
640 else
641 cr1 |= USART_CR1_M;
642 }
643 }
644
670 }
671
672 /*
673 * Word length configuration:
674 * CS8 + parity, 9 bits word aka [M1:M0] = 0b01
675 * CS7 or (CS6 + parity), 7 bits word aka [M1:M0] = 0b10
676 * CS8 or (CS7 + parity), 8 bits word aka [M1:M0] = 0b00
677 * M0 and M1 already cleared by cr1 initialization.
678 */
679 if (bits == 9)
680 cr1 |= USART_CR1_M0;
681 else if ((bits == 7) && cfg->has_7bits_data)
682 cr1 |= USART_CR1_M1;
683 else if (bits != 8)
684 dev_dbg(port->dev, "Unsupported data bits config: %u bits\n"
685 , bits);
686
645 if (cflag & PARODD)
646 cr1 |= USART_CR1_PS;
647
648 port->status &= ~(UPSTAT_AUTOCTS | UPSTAT_AUTORTS);
649 if (cflag & CRTSCTS) {
650 port->status |= UPSTAT_AUTOCTS | UPSTAT_AUTORTS;
651 cr3 |= USART_CR3_CTSE | USART_CR3_RTSE;
652 }

--- 631 unchanged lines hidden --- 		687 if (cflag & PARODD)
688 cr1 |= USART_CR1_PS;
689
690 port->status &= ~(UPSTAT_AUTOCTS | UPSTAT_AUTORTS);
691 if (cflag & CRTSCTS) {
692 port->status |= UPSTAT_AUTOCTS | UPSTAT_AUTORTS;
693 cr3 |= USART_CR3_CTSE | USART_CR3_RTSE;
694 }

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