From: Ed Blake <ed.blake@imgtec.com> To: <gregkh@linuxfoundation.org> Cc: <jslaby@suse.com>, <andriy.shevchenko@linux.intel.com>, <wangkefeng.wang@huawei.com>, <heikki.krogerus@linux.intel.com>, <noamc@ezchip.com>, <annie.wang@amd.com>, <linux-serial@vger.kernel.org>, <linux-kernel@vger.kernel.org>, <james.hartley@imgtec.com>, Ed Blake <ed.blake@imgtec.com> Subject: [PATCH 2/2] serial: 8250_dw: Add support for IrDA SIR mode Date: Thu, 27 Oct 2016 17:38:06 +0100 [thread overview] Message-ID: <1477586286-15748-1-git-send-email-ed.blake@imgtec.com> (raw) Add a set_ldisc function to enable/disable IrDA SIR mode according to the new line discipline. Signed-off-by: Ed Blake <ed.blake@imgtec.com> --- drivers/tty/serial/8250/8250_dw.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/drivers/tty/serial/8250/8250_dw.c b/drivers/tty/serial/8250/8250_dw.c index 459d726..7dd5369 100644 --- a/drivers/tty/serial/8250/8250_dw.c +++ b/drivers/tty/serial/8250/8250_dw.c @@ -53,6 +53,8 @@ /* Helper for fifo size calculation */ #define DW_UART_CPR_FIFO_SIZE(a) (((a >> 16) & 0xff) * 16) +/* DesignWare specific register fields */ +#define DW_UART_MCR_SIRE BIT(6) struct dw8250_data { u8 usr_reg; @@ -254,6 +256,20 @@ static void dw8250_set_termios(struct uart_port *p, struct ktermios *termios, serial8250_do_set_termios(p, termios, old); } +static void dw8250_set_ldisc(struct uart_port *p, struct ktermios *termios) +{ + unsigned int mcr = p->serial_in(p, UART_MCR); + + if (termios->c_line == N_IRDA) + mcr |= DW_UART_MCR_SIRE; + else + mcr &= ~DW_UART_MCR_SIRE; + + p->serial_out(p, UART_MCR, mcr); + + serial8250_do_set_ldisc(p, termios); +} + /* * dw8250_fallback_dma_filter will prevent the UART from getting just any free * channel on platforms that have DMA engines, but don't have any channels @@ -392,6 +408,7 @@ static int dw8250_probe(struct platform_device *pdev) p->iotype = UPIO_MEM; p->serial_in = dw8250_serial_in; p->serial_out = dw8250_serial_out; + p->set_ldisc = dw8250_set_ldisc; p->membase = devm_ioremap(dev, regs->start, resource_size(regs)); if (!p->membase) -- 1.9.1
WARNING: multiple messages have this Message-ID (diff)
From: Ed Blake <ed.blake@imgtec.com> To: gregkh@linuxfoundation.org Cc: jslaby@suse.com, andriy.shevchenko@linux.intel.com, wangkefeng.wang@huawei.com, heikki.krogerus@linux.intel.com, noamc@ezchip.com, annie.wang@amd.com, linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org, james.hartley@imgtec.com, Ed Blake <ed.blake@imgtec.com> Subject: [PATCH 2/2] serial: 8250_dw: Add support for IrDA SIR mode Date: Thu, 27 Oct 2016 17:38:06 +0100 [thread overview] Message-ID: <1477586286-15748-1-git-send-email-ed.blake@imgtec.com> (raw) Add a set_ldisc function to enable/disable IrDA SIR mode according to the new line discipline. Signed-off-by: Ed Blake <ed.blake@imgtec.com> --- drivers/tty/serial/8250/8250_dw.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/drivers/tty/serial/8250/8250_dw.c b/drivers/tty/serial/8250/8250_dw.c index 459d726..7dd5369 100644 --- a/drivers/tty/serial/8250/8250_dw.c +++ b/drivers/tty/serial/8250/8250_dw.c @@ -53,6 +53,8 @@ /* Helper for fifo size calculation */ #define DW_UART_CPR_FIFO_SIZE(a) (((a >> 16) & 0xff) * 16) +/* DesignWare specific register fields */ +#define DW_UART_MCR_SIRE BIT(6) struct dw8250_data { u8 usr_reg; @@ -254,6 +256,20 @@ static void dw8250_set_termios(struct uart_port *p, struct ktermios *termios, serial8250_do_set_termios(p, termios, old); } +static void dw8250_set_ldisc(struct uart_port *p, struct ktermios *termios) +{ + unsigned int mcr = p->serial_in(p, UART_MCR); + + if (termios->c_line == N_IRDA) + mcr |= DW_UART_MCR_SIRE; + else + mcr &= ~DW_UART_MCR_SIRE; + + p->serial_out(p, UART_MCR, mcr); + + serial8250_do_set_ldisc(p, termios); +} + /* * dw8250_fallback_dma_filter will prevent the UART from getting just any free * channel on platforms that have DMA engines, but don't have any channels @@ -392,6 +408,7 @@ static int dw8250_probe(struct platform_device *pdev) p->iotype = UPIO_MEM; p->serial_in = dw8250_serial_in; p->serial_out = dw8250_serial_out; + p->set_ldisc = dw8250_set_ldisc; p->membase = devm_ioremap(dev, regs->start, resource_size(regs)); if (!p->membase) -- 1.9.1
next reply other threads:[~2016-10-27 16:38 UTC|newest] Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top 2016-10-27 16:38 Ed Blake [this message] 2016-10-27 16:38 ` [PATCH 2/2] serial: 8250_dw: Add support for IrDA SIR mode Ed Blake 2016-10-27 16:56 ` Andy Shevchenko 2016-10-27 17:33 ` Ed Blake 2016-10-27 17:33 ` Ed Blake 2016-10-28 8:20 ` Heikki Krogerus 2016-10-28 10:45 ` Andy Shevchenko
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