| Message ID | 20220404082912.6885-8-ilpo.jarvinen@linux.intel.com (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
| Series | None | expand |
On Mon, Apr 4, 2022 at 10:29 AM Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> wrote: > > #define CLOCAL 00100000 > +#define ADDRB 010000000 /* address bit */ > #define CMSPAR 010000000000 /* mark or space (stick) parity */ > #define CRTSCTS 020000000000 /* flow control */ > > diff --git a/arch/mips/include/uapi/asm/termbits.h b/arch/mips/include/uapi/asm/termbits.h > index dfeffba729b7..e7ea31cfec78 100644 > --- a/arch/mips/include/uapi/asm/termbits.h > +++ b/arch/mips/include/uapi/asm/termbits.h > @@ -181,6 +181,7 @@ struct ktermios { > #define B3000000 0010015 > #define B3500000 0010016 > #define B4000000 0010017 > +#define ADDRB 0020000 /* address bit */ > #define CIBAUD 002003600000 /* input baud rate */ > #define CMSPAR 010000000000 /* mark or space (stick) parity */ > #define CRTSCTS 020000000000 /* flow control */ It looks like the top bits are used the same way on all architectures already, while the bottom bits of the flag differ. Could you pick the next free bit from the top to use the same value 04000000000 everywhere? Arnd
On Mon, 4 Apr 2022, Arnd Bergmann wrote: > On Mon, Apr 4, 2022 at 10:29 AM Ilpo Järvinen > <ilpo.jarvinen@linux.intel.com> wrote: > > > > > #define CLOCAL 00100000 > > +#define ADDRB 010000000 /* address bit */ > > #define CMSPAR 010000000000 /* mark or space (stick) parity */ > > #define CRTSCTS 020000000000 /* flow control */ > > > > diff --git a/arch/mips/include/uapi/asm/termbits.h b/arch/mips/include/uapi/asm/termbits.h > > index dfeffba729b7..e7ea31cfec78 100644 > > --- a/arch/mips/include/uapi/asm/termbits.h > > +++ b/arch/mips/include/uapi/asm/termbits.h > > @@ -181,6 +181,7 @@ struct ktermios { > > #define B3000000 0010015 > > #define B3500000 0010016 > > #define B4000000 0010017 > > +#define ADDRB 0020000 /* address bit */ > > #define CIBAUD 002003600000 /* input baud rate */ > > #define CMSPAR 010000000000 /* mark or space (stick) parity */ > > #define CRTSCTS 020000000000 /* flow control */ > > It looks like the top bits are used the same way on all architectures > already, while the bottom bits of the flag differ. Could you pick > the next free bit from the top to use the same value 04000000000 > everywhere? 04000000000 isn't the top of the use: diff --git a/arch/alpha/include/uapi/asm/termbits.h b/arch/alpha/include/uapi/asm/termbits.h index 4575ba34a0ea..285169c794ec 100644 --- a/arch/alpha/include/uapi/asm/termbits.h +++ b/arch/alpha/include/uapi/asm/termbits.h @@ -178,10 +178,11 @@ struct ktermios { #define PARENB 00010000 #define PARODD 00020000 #define HUPCL 00040000 #define CLOCAL 00100000 +#define ADDRB 010000000 /* address bit */ #define CMSPAR 010000000000 /* mark or space (stick) parity */ #define CRTSCTS 020000000000 /* flow control */ #define CIBAUD 07600000 #define IBSHIFT 16 diff --git a/arch/sparc/include/uapi/asm/termbits.h b/arch/sparc/include/uapi/asm/termbits.h index ce5ad5d0f105..4ad60c4acf65 100644 --- a/arch/sparc/include/uapi/asm/termbits.h +++ b/arch/sparc/include/uapi/asm/termbits.h @@ -198,10 +198,11 @@ struct ktermios { adjust CBAUD constant and drivers accordingly. #define B4000000 0x00001013 */ +#define ADDRB 0x00002000 /* address bit */ #define CIBAUD 0x100f0000 /* input baud rate (not used) */ #define CMSPAR 0x40000000 /* mark or space (stick) parity */ #define CRTSCTS 0x80000000 /* flow control */ Somehow I managed to convince myself earlier there isn't a bit available that would be consistent across archs but now that I recheck the 04000000000 bit (0x20000000) you propose, it seems to be that nothing is using it. It's not suprising I didn't get the magnitude of those long octal numbers right. ...They are such a pain to interpret correctly.
diff --git a/arch/alpha/include/uapi/asm/termbits.h b/arch/alpha/include/uapi/asm/termbits.h index 4575ba34a0ea..285169c794ec 100644 --- a/arch/alpha/include/uapi/asm/termbits.h +++ b/arch/alpha/include/uapi/asm/termbits.h @@ -180,6 +180,7 @@ struct ktermios { #define HUPCL 00040000 #define CLOCAL 00100000 +#define ADDRB 010000000 /* address bit */ #define CMSPAR 010000000000 /* mark or space (stick) parity */ #define CRTSCTS 020000000000 /* flow control */ diff --git a/arch/mips/include/uapi/asm/termbits.h b/arch/mips/include/uapi/asm/termbits.h index dfeffba729b7..e7ea31cfec78 100644 --- a/arch/mips/include/uapi/asm/termbits.h +++ b/arch/mips/include/uapi/asm/termbits.h @@ -181,6 +181,7 @@ struct ktermios { #define B3000000 0010015 #define B3500000 0010016 #define B4000000 0010017 +#define ADDRB 0020000 /* address bit */ #define CIBAUD 002003600000 /* input baud rate */ #define CMSPAR 010000000000 /* mark or space (stick) parity */ #define CRTSCTS 020000000000 /* flow control */ diff --git a/arch/parisc/include/uapi/asm/termbits.h b/arch/parisc/include/uapi/asm/termbits.h index 40e920f8d683..629be061f5d5 100644 --- a/arch/parisc/include/uapi/asm/termbits.h +++ b/arch/parisc/include/uapi/asm/termbits.h @@ -158,6 +158,7 @@ struct ktermios { #define B3000000 0010015 #define B3500000 0010016 #define B4000000 0010017 +#define ADDRB 0020000 /* address bit */ #define CIBAUD 002003600000 /* input baud rate */ #define CMSPAR 010000000000 /* mark or space (stick) parity */ #define CRTSCTS 020000000000 /* flow control */ diff --git a/arch/powerpc/include/uapi/asm/termbits.h b/arch/powerpc/include/uapi/asm/termbits.h index ed18bc61f63d..1b778ac562a4 100644 --- a/arch/powerpc/include/uapi/asm/termbits.h +++ b/arch/powerpc/include/uapi/asm/termbits.h @@ -171,6 +171,7 @@ struct ktermios { #define HUPCL 00040000 #define CLOCAL 00100000 +#define ADDRB 00200000 /* address bit */ #define CMSPAR 010000000000 /* mark or space (stick) parity */ #define CRTSCTS 020000000000 /* flow control */ diff --git a/arch/sparc/include/uapi/asm/termbits.h b/arch/sparc/include/uapi/asm/termbits.h index ce5ad5d0f105..4ad60c4acf65 100644 --- a/arch/sparc/include/uapi/asm/termbits.h +++ b/arch/sparc/include/uapi/asm/termbits.h @@ -200,6 +200,7 @@ struct ktermios { #define B3000000 0x00001011 #define B3500000 0x00001012 #define B4000000 0x00001013 */ +#define ADDRB 0x00002000 /* address bit */ #define CIBAUD 0x100f0000 /* input baud rate (not used) */ #define CMSPAR 0x40000000 /* mark or space (stick) parity */ #define CRTSCTS 0x80000000 /* flow control */ diff --git a/drivers/char/pcmcia/synclink_cs.c b/drivers/char/pcmcia/synclink_cs.c index 78baba55a8b5..d179b9b57a25 100644 --- a/drivers/char/pcmcia/synclink_cs.c +++ b/drivers/char/pcmcia/synclink_cs.c @@ -2287,6 +2287,8 @@ static void mgslpc_set_termios(struct tty_struct *tty, struct ktermios *old_term == RELEVANT_IFLAG(old_termios->c_iflag))) return; + tty->termios.c_cflag &= ~ADDRB; + mgslpc_change_params(info, tty); /* Handle transition to B0 status */ diff --git a/drivers/ipack/devices/ipoctal.c b/drivers/ipack/devices/ipoctal.c index 20d2b9ec1227..d66cc9683ebc 100644 --- a/drivers/ipack/devices/ipoctal.c +++ b/drivers/ipack/devices/ipoctal.c @@ -506,6 +506,8 @@ static void ipoctal_set_termios(struct tty_struct *tty, struct ipoctal_channel *channel = tty->driver_data; speed_t baud; + tty->termios.c_cflag &= ~ADDRB; + cflag = tty->termios.c_cflag; /* Disable and reset everything before change the setup */ diff --git a/drivers/mmc/core/sdio_uart.c b/drivers/mmc/core/sdio_uart.c index 04c0823e0359..7432b01379ef 100644 --- a/drivers/mmc/core/sdio_uart.c +++ b/drivers/mmc/core/sdio_uart.c @@ -880,6 +880,8 @@ static void sdio_uart_set_termios(struct tty_struct *tty, if (sdio_uart_claim_func(port) != 0) return; + tty->termios.c_cflag &= ~ADDRB; + sdio_uart_change_speed(port, &tty->termios, old_termios); /* Handle transition to B0 status */ diff --git a/drivers/net/usb/hso.c b/drivers/net/usb/hso.c index f97813a4e8d1..b687327bc7b1 100644 --- a/drivers/net/usb/hso.c +++ b/drivers/net/usb/hso.c @@ -1099,7 +1099,8 @@ static void _hso_serial_set_termios(struct tty_struct *tty) ~(CSIZE /* no size */ | PARENB /* disable parity bit */ | CBAUD /* clear current baud rate */ - | CBAUDEX); /* clear current buad rate */ + | CBAUDEX /* clear current baud rate */ + | ADDRB); /* disable 9th (addr) bit */ tty->termios.c_cflag |= CS8; /* character size 8 bits */ diff --git a/drivers/s390/char/tty3270.c b/drivers/s390/char/tty3270.c index 5c83f71c1d0e..253d2997a1d3 100644 --- a/drivers/s390/char/tty3270.c +++ b/drivers/s390/char/tty3270.c @@ -1768,6 +1768,9 @@ tty3270_set_termios(struct tty_struct *tty, struct ktermios *old) tp = tty->driver_data; if (!tp) return; + + tty->termios.c_cflag &= ~ADDRB; + spin_lock_bh(&tp->view.lock); if (L_ICANON(tty)) { new = L_ECHO(tty) ? TF_INPUT: TF_INPUTN; diff --git a/drivers/staging/greybus/uart.c b/drivers/staging/greybus/uart.c index dc4ed0ff1ae2..83e73aefde0f 100644 --- a/drivers/staging/greybus/uart.c +++ b/drivers/staging/greybus/uart.c @@ -487,6 +487,8 @@ static void gb_tty_set_termios(struct tty_struct *tty, struct ktermios *termios = &tty->termios; u8 newctrl = gb_tty->ctrlout; + termios->c_cflag &= ~ADDRB; + newline.rate = cpu_to_le32(tty_get_baud_rate(tty)); newline.format = termios->c_cflag & CSTOPB ? GB_SERIAL_2_STOP_BITS : GB_SERIAL_1_STOP_BITS; diff --git a/drivers/tty/amiserial.c b/drivers/tty/amiserial.c index 533d02b38e02..3ca97007bd6e 100644 --- a/drivers/tty/amiserial.c +++ b/drivers/tty/amiserial.c @@ -1175,7 +1175,11 @@ static void rs_set_termios(struct tty_struct *tty, struct ktermios *old_termios) { struct serial_state *info = tty->driver_data; unsigned long flags; - unsigned int cflag = tty->termios.c_cflag; + unsigned int cflag; + + tty->termios.c_cflag &= ~ADDRB; + + cflag = tty->termios.c_cflag; change_speed(tty, info, old_termios); diff --git a/drivers/tty/moxa.c b/drivers/tty/moxa.c index f3c72ab1476c..07cd88152d58 100644 --- a/drivers/tty/moxa.c +++ b/drivers/tty/moxa.c @@ -2050,6 +2050,7 @@ static int MoxaPortSetTermio(struct moxa_port *port, struct ktermios *termio, ofsAddr = port->tableAddr; + termio->c_cflag &= ~ADDRB; mode = termio->c_cflag & CSIZE; if (mode == CS5) mode = MX_CS5; diff --git a/drivers/tty/mxser.c b/drivers/tty/mxser.c index 836c9eca2946..220676363a07 100644 --- a/drivers/tty/mxser.c +++ b/drivers/tty/mxser.c @@ -577,6 +577,7 @@ static void mxser_change_speed(struct tty_struct *tty, struct ktermios *old_term struct mxser_port *info = tty->driver_data; unsigned cflag, cval; + tty->termios.c_cflag &= ~ADDRB; cflag = tty->termios.c_cflag; if (mxser_set_baud(tty, tty_get_baud_rate(tty))) { diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index c6ac91033e38..de198c2acefe 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -1493,6 +1493,8 @@ static void uart_set_termios(struct tty_struct *tty, goto out; } + tty->termios.c_cflag &= ~ADDRB; + uart_change_speed(tty, state, old_termios); /* reload cflag from termios; port driver may have overridden flags */ cflag = tty->termios.c_cflag; diff --git a/drivers/tty/synclink_gt.c b/drivers/tty/synclink_gt.c index 25c558e65ece..ee767cea18ed 100644 --- a/drivers/tty/synclink_gt.c +++ b/drivers/tty/synclink_gt.c @@ -714,6 +714,8 @@ static void set_termios(struct tty_struct *tty, struct ktermios *old_termios) DBGINFO(("%s set_termios\n", tty->driver->name)); + tty->termios.c_cflag &= ~ADDRB; + change_params(info); /* Handle transition to B0 status */ diff --git a/drivers/tty/tty_ioctl.c b/drivers/tty/tty_ioctl.c index 63181925ec1a..934037d78868 100644 --- a/drivers/tty/tty_ioctl.c +++ b/drivers/tty/tty_ioctl.c @@ -319,6 +319,8 @@ unsigned char tty_get_frame_size(unsigned int cflag) bits++; if (cflag & PARENB) bits++; + if (cflag & ADDRB) + bits++; return bits; } diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c index 9b9aea24d58c..fd246ec70da8 100644 --- a/drivers/usb/class/cdc-acm.c +++ b/drivers/usb/class/cdc-acm.c @@ -1056,6 +1056,8 @@ static void acm_tty_set_termios(struct tty_struct *tty, struct usb_cdc_line_coding newline; int newctrl = acm->ctrlout; + termios->c_cflag &= ~ADDRB; + newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty)); newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0; newline.bParityType = termios->c_cflag & PARENB ? diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c index 24101bd7fcad..8d1d170eb7e6 100644 --- a/drivers/usb/serial/usb-serial.c +++ b/drivers/usb/serial/usb-serial.c @@ -525,10 +525,12 @@ static void serial_set_termios(struct tty_struct *tty, struct ktermios *old) dev_dbg(&port->dev, "%s\n", __func__); - if (port->serial->type->set_termios) + if (port->serial->type->set_termios) { + tty->termios.c_cflag &= ~ADDRB; port->serial->type->set_termios(tty, port, old); - else + } else { tty_termios_copy_hw(&tty->termios, old); + } } static int serial_break(struct tty_struct *tty, int break_state) diff --git a/include/uapi/asm-generic/termbits.h b/include/uapi/asm-generic/termbits.h index 2fbaf9ae89dd..5f5228329d45 100644 --- a/include/uapi/asm-generic/termbits.h +++ b/include/uapi/asm-generic/termbits.h @@ -157,6 +157,7 @@ struct ktermios { #define B3000000 0010015 #define B3500000 0010016 #define B4000000 0010017 +#define ADDRB 0020000 /* address bit */ #define CIBAUD 002003600000 /* input baud rate */ #define CMSPAR 010000000000 /* mark or space (stick) parity */ #define CRTSCTS 020000000000 /* flow control */ diff --git a/net/bluetooth/rfcomm/tty.c b/net/bluetooth/rfcomm/tty.c index ebd78fdbd6e8..832e725f23ab 100644 --- a/net/bluetooth/rfcomm/tty.c +++ b/net/bluetooth/rfcomm/tty.c @@ -871,6 +871,8 @@ static void rfcomm_tty_set_termios(struct tty_struct *tty, struct ktermios *old) if (!dev || !dev->dlc || !dev->dlc->session) return; + new->c_cflag &= ~ADDRB; + /* Handle turning off CRTSCTS */ if ((old->c_cflag & CRTSCTS) && !(new->c_cflag & CRTSCTS)) BT_DBG("Turning off CRTSCTS unsupported");
Add ADDRB to termbits to indicate 9th bit addressing mode. This change is necessary for supporting devices with RS485 multipoint addressing [*]. A later patch in the patch series adds support for Synopsys Designware UART capable for 9th bit addressing mode. In this mode, 9th bit is used to indicate an address (byte) within the communication line. The 9th bit addressing mode is selected using ADDRB introduced by an earlier patch. [*] Technically, RS485 is just an electronic spec and does not itself specify the 9th bit addressing mode but 9th bit seems at least "semi-standard" way to do addressing with RS485. Cc: linux-api@vger.kernel.org Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Matt Turner <mattst88@gmail.com> Cc: linux-alpha@vger.kernel.org Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: linux-mips@vger.kernel.org Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com> Cc: Helge Deller <deller@gmx.de> Cc: linux-parisc@vger.kernel.org Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: linuxppc-dev@lists.ozlabs.org Cc: "David S. Miller" <davem@davemloft.net> Cc: sparclinux@vger.kernel.org Cc: Arnd Bergmann <arnd@arndb.de> Cc: linux-arch@vger.kernel.org Cc: linux-usb@vger.kernel.org Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> --- arch/alpha/include/uapi/asm/termbits.h | 1 + arch/mips/include/uapi/asm/termbits.h | 1 + arch/parisc/include/uapi/asm/termbits.h | 1 + arch/powerpc/include/uapi/asm/termbits.h | 1 + arch/sparc/include/uapi/asm/termbits.h | 1 + drivers/char/pcmcia/synclink_cs.c | 2 ++ drivers/ipack/devices/ipoctal.c | 2 ++ drivers/mmc/core/sdio_uart.c | 2 ++ drivers/net/usb/hso.c | 3 ++- drivers/s390/char/tty3270.c | 3 +++ drivers/staging/greybus/uart.c | 2 ++ drivers/tty/amiserial.c | 6 +++++- drivers/tty/moxa.c | 1 + drivers/tty/mxser.c | 1 + drivers/tty/serial/serial_core.c | 2 ++ drivers/tty/synclink_gt.c | 2 ++ drivers/tty/tty_ioctl.c | 2 ++ drivers/usb/class/cdc-acm.c | 2 ++ drivers/usb/serial/usb-serial.c | 6 ++++-- include/uapi/asm-generic/termbits.h | 1 + net/bluetooth/rfcomm/tty.c | 2 ++ 21 files changed, 40 insertions(+), 4 deletions(-)