[PATCH 35/35] tty: make use of tty_get_byte_size
From: Jiri Slaby
Date: Wed May 05 2021 - 05:21:44 EST
In the previous patch, we introduced tty_get_byte_size for computing
byte size. Here, we make use of it in various tty drivers.
The stats look nice: 16 insertions, 203 deletions.
Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
Cc: Arnd Bergmann <arnd@xxxxxxxx>
Cc: David Lin <dtwlin@xxxxxxxxx>
Cc: Johan Hovold <johan@xxxxxxxxxx>
Cc: Alex Elder <elder@xxxxxxxxxx>
Cc: Shawn Guo <shawnguo@xxxxxxxxxx>
Cc: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
Cc: Andy Gross <agross@xxxxxxxxxx>
Cc: Bjorn Andersson <bjorn.andersson@xxxxxxxxxx>
Cc: Maxime Coquelin <mcoquelin.stm32@xxxxxxxxx>
Cc: Alexandre Torgue <alexandre.torgue@xxxxxxxxxxx>
Cc: Oliver Neukum <oneukum@xxxxxxxx>
---
drivers/char/pcmcia/synclink_cs.c | 8 +-----
drivers/staging/greybus/uart.c | 16 +----------
drivers/tty/serial/cpm_uart/cpm_uart_core.c | 19 +-----------
drivers/tty/serial/mxs-auart.c | 18 +-----------
drivers/tty/serial/qcom_geni_serial.c | 16 +----------
drivers/tty/serial/sh-sci.c | 20 +------------
drivers/tty/serial/stm32-usart.c | 32 +--------------------
drivers/tty/synclink_gt.c | 9 +-----
drivers/usb/class/cdc-acm.c | 17 ++---------
drivers/usb/serial/belkin_sa.c | 21 ++------------
drivers/usb/serial/cypress_m8.c | 19 ++----------
drivers/usb/serial/pl2303.c | 15 +---------
drivers/usb/serial/whiteheat.c | 9 +-----
13 files changed, 16 insertions(+), 203 deletions(-)
diff --git a/drivers/char/pcmcia/synclink_cs.c b/drivers/char/pcmcia/synclink_cs.c
index 9f7420bc5026..502d04da54ba 100644
--- a/drivers/char/pcmcia/synclink_cs.c
+++ b/drivers/char/pcmcia/synclink_cs.c
@@ -1419,13 +1419,7 @@ static void mgslpc_change_params(MGSLPC_INFO *info, struct tty_struct *tty)
/* byte size and parity */
- switch (cflag & CSIZE) {
- case CS5: info->params.data_bits = 5; break;
- case CS6: info->params.data_bits = 6; break;
- case CS7: info->params.data_bits = 7; break;
- case CS8: info->params.data_bits = 8; break;
- default: info->params.data_bits = 7; break;
- }
+ info->params.data_bits = tty_get_byte_size(cflag, false);
if (cflag & CSTOPB)
info->params.stop_bits = 2;
diff --git a/drivers/staging/greybus/uart.c b/drivers/staging/greybus/uart.c
index ccfaa0f21b9c..3db2f414f519 100644
--- a/drivers/staging/greybus/uart.c
+++ b/drivers/staging/greybus/uart.c
@@ -494,21 +494,7 @@ static void gb_tty_set_termios(struct tty_struct *tty,
(termios->c_cflag & PARODD ? 1 : 2) +
(termios->c_cflag & CMSPAR ? 2 : 0) : 0;
- switch (termios->c_cflag & CSIZE) {
- case CS5:
- newline.data_bits = 5;
- break;
- case CS6:
- newline.data_bits = 6;
- break;
- case CS7:
- newline.data_bits = 7;
- break;
- case CS8:
- default:
- newline.data_bits = 8;
- break;
- }
+ newline.data_bits = tty_get_byte_size(termios->c_cflag, false);
/* FIXME: needs to clear unsupported bits in the termios */
gb_tty->clocal = ((termios->c_cflag & CLOCAL) != 0);
diff --git a/drivers/tty/serial/cpm_uart/cpm_uart_core.c b/drivers/tty/serial/cpm_uart/cpm_uart_core.c
index 58aaa533203b..1ac4746c27ac 100644
--- a/drivers/tty/serial/cpm_uart/cpm_uart_core.c
+++ b/drivers/tty/serial/cpm_uart/cpm_uart_core.c
@@ -524,24 +524,7 @@ static void cpm_uart_set_termios(struct uart_port *port,
scval = 0;
/* byte size */
- switch (termios->c_cflag & CSIZE) {
- case CS5:
- bits = 5;
- break;
- case CS6:
- bits = 6;
- break;
- case CS7:
- bits = 7;
- break;
- case CS8:
- bits = 8;
- break;
- /* Never happens, but GCC is too dumb to figure it out */
- default:
- bits = 8;
- break;
- }
+ bits = tty_get_byte_size(termios->c_cflag, false);
sbits = bits - 5;
if (termios->c_cflag & CSTOPB) {
diff --git a/drivers/tty/serial/mxs-auart.c b/drivers/tty/serial/mxs-auart.c
index f414d6acad69..a5cbd7324268 100644
--- a/drivers/tty/serial/mxs-auart.c
+++ b/drivers/tty/serial/mxs-auart.c
@@ -971,23 +971,7 @@ static void mxs_auart_settermios(struct uart_port *u,
ctrl2 = mxs_read(s, REG_CTRL2);
/* byte size */
- switch (cflag & CSIZE) {
- case CS5:
- bm = 0;
- break;
- case CS6:
- bm = 1;
- break;
- case CS7:
- bm = 2;
- break;
- case CS8:
- bm = 3;
- break;
- default:
- return;
- }
-
+ bm = tty_get_byte_size(cflag, false) - 5;
ctrl |= AUART_LINECTRL_WLEN(bm);
/* parity */
diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c
index 23d729ed3bf6..9488eefff67c 100644
--- a/drivers/tty/serial/qcom_geni_serial.c
+++ b/drivers/tty/serial/qcom_geni_serial.c
@@ -1050,21 +1050,7 @@ static void qcom_geni_serial_set_termios(struct uart_port *uport,
}
/* bits per char */
- switch (termios->c_cflag & CSIZE) {
- case CS5:
- bits_per_char = 5;
- break;
- case CS6:
- bits_per_char = 6;
- break;
- case CS7:
- bits_per_char = 7;
- break;
- case CS8:
- default:
- bits_per_char = 8;
- break;
- }
+ bits_per_char = tty_get_byte_size(termios->c_cflag, false);
/* stop bits */
if (termios->c_cflag & CSTOPB)
diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c
index bef8ca742ed9..b3a692f76a55 100644
--- a/drivers/tty/serial/sh-sci.c
+++ b/drivers/tty/serial/sh-sci.c
@@ -2494,25 +2494,7 @@ static void sci_set_termios(struct uart_port *port, struct ktermios *termios,
uart_update_timeout(port, termios->c_cflag, baud);
/* byte size and parity */
- switch (termios->c_cflag & CSIZE) {
- case CS5:
- bits = 7;
- break;
- case CS6:
- bits = 8;
- break;
- case CS7:
- bits = 9;
- break;
- default:
- bits = 10;
- break;
- }
-
- if (termios->c_cflag & CSTOPB)
- bits++;
- if (termios->c_cflag & PARENB)
- bits++;
+ bits = tty_get_byte_size(termios->c_cflag, true);
if (best_clk >= 0) {
if (port->type == PORT_SCIFA || port->type == PORT_SCIFB)
diff --git a/drivers/tty/serial/stm32-usart.c b/drivers/tty/serial/stm32-usart.c
index c2ae7b392b86..3a36a1a2f55a 100644
--- a/drivers/tty/serial/stm32-usart.c
+++ b/drivers/tty/serial/stm32-usart.c
@@ -718,36 +718,6 @@ static void stm32_usart_shutdown(struct uart_port *port)
free_irq(port->irq, port);
}
-static unsigned int stm32_usart_get_databits(struct ktermios *termios)
-{
- unsigned int bits;
-
- tcflag_t cflag = termios->c_cflag;
-
- switch (cflag & CSIZE) {
- /*
- * CSIZE settings are not necessarily supported in hardware.
- * CSIZE unsupported configurations are handled here to set word length
- * to 8 bits word as default configuration and to print debug message.
- */
- case CS5:
- bits = 5;
- break;
- case CS6:
- bits = 6;
- break;
- case CS7:
- bits = 7;
- break;
- /* default including CS8 */
- default:
- bits = 8;
- break;
- }
-
- return bits;
-}
-
static void stm32_usart_set_termios(struct uart_port *port,
struct ktermios *termios,
struct ktermios *old)
@@ -805,7 +775,7 @@ static void stm32_usart_set_termios(struct uart_port *port,
if (cflag & CSTOPB)
cr2 |= USART_CR2_STOP_2B;
- bits = stm32_usart_get_databits(termios);
+ bits = tty_get_byte_size(cflag, false);
stm32_port->rdr_mask = (BIT(bits) - 1);
if (cflag & PARENB) {
diff --git a/drivers/tty/synclink_gt.c b/drivers/tty/synclink_gt.c
index cf87dc66087b..af9fcb0e11db 100644
--- a/drivers/tty/synclink_gt.c
+++ b/drivers/tty/synclink_gt.c
@@ -2465,14 +2465,7 @@ static void change_params(struct slgt_info *info)
/* byte size and parity */
- switch (cflag & CSIZE) {
- case CS5: info->params.data_bits = 5; break;
- case CS6: info->params.data_bits = 6; break;
- case CS7: info->params.data_bits = 7; break;
- case CS8: info->params.data_bits = 8; break;
- default: info->params.data_bits = 7; break;
- }
-
+ info->params.data_bits = tty_get_byte_size(cflag, false);
info->params.stop_bits = (cflag & CSTOPB) ? 2 : 1;
if (cflag & PARENB)
diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index 81199efe0312..e44b6bbd008b 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -1056,21 +1056,8 @@ static void acm_tty_set_termios(struct tty_struct *tty,
newline.bParityType = termios->c_cflag & PARENB ?
(termios->c_cflag & PARODD ? 1 : 2) +
(termios->c_cflag & CMSPAR ? 2 : 0) : 0;
- switch (termios->c_cflag & CSIZE) {
- case CS5:
- newline.bDataBits = 5;
- break;
- case CS6:
- newline.bDataBits = 6;
- break;
- case CS7:
- newline.bDataBits = 7;
- break;
- case CS8:
- default:
- newline.bDataBits = 8;
- break;
- }
+ newline.bDataBits = tty_get_byte_size(termios->c_cflag, false);
+
/* FIXME: Needs to clear unsupported bits in the termios */
acm->clocal = ((termios->c_cflag & CLOCAL) != 0);
diff --git a/drivers/usb/serial/belkin_sa.c b/drivers/usb/serial/belkin_sa.c
index ed9193f3bb1a..a5bfe8e6c0c9 100644
--- a/drivers/usb/serial/belkin_sa.c
+++ b/drivers/usb/serial/belkin_sa.c
@@ -356,25 +356,8 @@ static void belkin_sa_set_termios(struct tty_struct *tty,
/* set the number of data bits */
if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
- switch (cflag & CSIZE) {
- case CS5:
- urb_value = BELKIN_SA_DATA_BITS(5);
- break;
- case CS6:
- urb_value = BELKIN_SA_DATA_BITS(6);
- break;
- case CS7:
- urb_value = BELKIN_SA_DATA_BITS(7);
- break;
- case CS8:
- urb_value = BELKIN_SA_DATA_BITS(8);
- break;
- default:
- dev_dbg(&port->dev,
- "CSIZE was not CS5-CS8, using default of 8\n");
- urb_value = BELKIN_SA_DATA_BITS(8);
- break;
- }
+ urb_value = BELKIN_SA_DATA_BITS(tty_get_byte_size(cflag,
+ false));
if (BSA_USB_CMD(BELKIN_SA_SET_DATA_BITS_REQUEST, urb_value) < 0)
dev_err(&port->dev, "Set data bits error\n");
}
diff --git a/drivers/usb/serial/cypress_m8.c b/drivers/usb/serial/cypress_m8.c
index 1dca04e1519d..b135ed1ee512 100644
--- a/drivers/usb/serial/cypress_m8.c
+++ b/drivers/usb/serial/cypress_m8.c
@@ -887,23 +887,8 @@ static void cypress_set_termios(struct tty_struct *tty,
} else
parity_enable = parity_type = 0;
- switch (cflag & CSIZE) {
- case CS5:
- data_bits = 0;
- break;
- case CS6:
- data_bits = 1;
- break;
- case CS7:
- data_bits = 2;
- break;
- case CS8:
- data_bits = 3;
- break;
- default:
- dev_err(dev, "%s - CSIZE was set, but not CS5-CS8\n", __func__);
- data_bits = 3;
- }
+ data_bits = tty_get_byte_size(cflag, false) - 5;
+
spin_lock_irqsave(&priv->lock, flags);
oldlines = priv->line_control;
if ((cflag & CBAUD) == B0) {
diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c
index fd773d252691..76e4d90a9d43 100644
--- a/drivers/usb/serial/pl2303.c
+++ b/drivers/usb/serial/pl2303.c
@@ -788,20 +788,7 @@ static void pl2303_set_termios(struct tty_struct *tty,
pl2303_get_line_request(port, buf);
- switch (C_CSIZE(tty)) {
- case CS5:
- buf[6] = 5;
- break;
- case CS6:
- buf[6] = 6;
- break;
- case CS7:
- buf[6] = 7;
- break;
- default:
- case CS8:
- buf[6] = 8;
- }
+ buf[6] = tty_get_byte_size(C_CSIZE(tty), false);
dev_dbg(&port->dev, "data bits = %d\n", buf[6]);
/* For reference buf[0]:buf[3] baud rate value */
diff --git a/drivers/usb/serial/whiteheat.c b/drivers/usb/serial/whiteheat.c
index 5116ed9db3eb..7d4f2c1de4f6 100644
--- a/drivers/usb/serial/whiteheat.c
+++ b/drivers/usb/serial/whiteheat.c
@@ -625,14 +625,7 @@ static void firm_setup_port(struct tty_struct *tty)
port_settings.port = port->port_number + 1;
- /* get the byte size */
- switch (cflag & CSIZE) {
- case CS5: port_settings.bits = 5; break;
- case CS6: port_settings.bits = 6; break;
- case CS7: port_settings.bits = 7; break;
- default:
- case CS8: port_settings.bits = 8; break;
- }
+ port_settings.bits = tty_get_byte_size(cflag, false);
dev_dbg(dev, "%s - data bits = %d\n", __func__, port_settings.bits);
/* determine the parity */
--
2.31.1