| /Linux-v6.6/Documentation/devicetree/bindings/serial/ |
| D | rs485.yaml | 4 $id: http://devicetree.org/schemas/serial/rs485.yaml#
7 title: RS485 serial communications
17 rs485-rts-delay:
32 rs485-rts-active-low:
36 rs485-rx-active-high:
41 linux,rs485-enabled-at-boot-time:
42 description: enables the rs485 feature at boot time. It can be disabled
46 rs485-rx-during-tx:
50 rs485-term-gpios:
51 description: GPIO pin to enable RS485 bus termination.
[all …]
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| /Linux-v6.6/drivers/tty/serial/8250/ |
| D | 8250_dwlib.c | 17 #define DW_UART_TCR 0xac /* Transceiver Control Register (RS485) */
138 static void dw8250_rs485_set_addr(struct uart_port *p, struct serial_rs485 *rs485, in dw8250_rs485_set_addr() argument
143 if (rs485->flags & SER_RS485_ADDRB) { in dw8250_rs485_set_addr()
148 if (rs485->flags & SER_RS485_ADDR_RECV) { in dw8250_rs485_set_addr()
149 u32 delta = p->rs485.flags ^ rs485->flags; in dw8250_rs485_set_addr()
152 * rs485 (param) is equal to uart_port's rs485 only during init in dw8250_rs485_set_addr()
155 if (unlikely(&p->rs485 == rs485)) in dw8250_rs485_set_addr()
156 delta = rs485->flags; in dw8250_rs485_set_addr()
159 (p->rs485.addr_recv != rs485->addr_recv)) in dw8250_rs485_set_addr()
160 dw8250_update_rar(p, rs485->addr_recv); in dw8250_rs485_set_addr()
[all …]
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| D | 8250_fintek.c | 50 #define RS485 0xF0 macro
195 struct serial_rs485 *rs485) in fintek_8250_rs485_config() argument
204 if (rs485->flags & SER_RS485_ENABLED) { in fintek_8250_rs485_config()
206 if (!(rs485->flags & SER_RS485_RTS_ON_SEND) == in fintek_8250_rs485_config()
207 !(rs485->flags & SER_RS485_RTS_AFTER_SEND)) in fintek_8250_rs485_config()
212 if (rs485->delay_rts_before_send) { in fintek_8250_rs485_config()
213 rs485->delay_rts_before_send = 1; in fintek_8250_rs485_config()
217 if (rs485->delay_rts_after_send) { in fintek_8250_rs485_config()
218 rs485->delay_rts_after_send = 1; in fintek_8250_rs485_config()
222 if (rs485->flags & SER_RS485_RTS_ON_SEND) in fintek_8250_rs485_config()
[all …]
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| D | 8250_lpc18xx.c | 36 struct serial_rs485 *rs485) in lpc18xx_rs485_config() argument
43 if (rs485->flags & SER_RS485_ENABLED) { in lpc18xx_rs485_config()
47 if (rs485->flags & SER_RS485_RTS_ON_SEND) in lpc18xx_rs485_config()
51 if (rs485->delay_rts_after_send) { in lpc18xx_rs485_config()
53 rs485_dly_reg = DIV_ROUND_UP(rs485->delay_rts_after_send in lpc18xx_rs485_config()
60 rs485->delay_rts_after_send = (rs485_dly_reg * MSEC_PER_SEC) in lpc18xx_rs485_config()
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| D | 8250_bcm2835aux.c | 12 * simultaneously to rs485.
54 if (!(up->port.rs485.flags & SER_RS485_RX_DURING_TX)) { in bcm2835aux_rs485_start_tx()
65 if (up->port.rs485.flags & SER_RS485_RTS_ON_SEND) in bcm2835aux_rs485_start_tx()
73 if (up->port.rs485.flags & SER_RS485_RTS_AFTER_SEND) in bcm2835aux_rs485_stop_tx()
78 if (!(up->port.rs485.flags & SER_RS485_RX_DURING_TX)) { in bcm2835aux_rs485_stop_tx()
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| D | 8250_pci1xxxx.c | 169 struct serial_rs485 *rs485) in pci1xxxx_rs485_config() argument
180 if (rs485->flags & SER_RS485_ENABLED) { in pci1xxxx_rs485_config()
183 if (!(rs485->flags & SER_RS485_RTS_ON_SEND)) in pci1xxxx_rs485_config()
186 if (rs485->delay_rts_after_send) { in pci1xxxx_rs485_config()
192 rs485->delay_rts_after_send * NSEC_PER_MSEC / in pci1xxxx_rs485_config()
199 rs485->delay_rts_after_send = in pci1xxxx_rs485_config()
|
| /Linux-v6.6/Documentation/driver-api/serial/ |
| D | serial-rs485.rst | 2 RS485 Serial Communications
21 half-duplex hardware like an RS485 transceiver or any RS232-connected
32 The Linux kernel provides the struct serial_rs485 to handle RS485
33 communications. This data structure is used to set and configure RS485
36 The device tree can also provide RS485 boot time parameters
41 Any driver for devices capable of working both as RS232 and RS485 should
48 what RS485 features the driver supports for the ``struct uart_port``.
58 From user-level, RS485 configuration can be get/set using the previous
59 ioctls. For instance, to set RS485 you can use the following code::
63 /* Include definition for RS485 ioctls: TIOCGRS485 and TIOCSRS485 */
[all …]
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| /Linux-v6.6/include/uapi/linux/ |
| D | serial.h | 111 * struct serial_rs485 - serial interface for controlling RS485 settings.
112 * @flags: RS485 feature flags.
115 * @addr_recv: Receive filter for RS485 addressing mode
117 * @addr_dest: Destination address for RS485 addressing mode
125 * Serial interface for controlling RS485 settings on chips with suitable
132 * * %SER_RS485_ENABLED - RS485 enabled.
135 * * %SER_RS485_RX_DURING_TX - Full-duplex RS485 line.
137 * * %SER_RS485_ADDRB - Enable RS485 addressing mode.
|
| /Linux-v6.6/arch/arm/boot/dts/microchip/ |
| D | aks-cdu.dts | 32 linux,rs485-enabled-at-boot-time;
33 rs485-rts-delay = <0 0>;
38 linux,rs485-enabled-at-boot-time;
39 rs485-rts-delay = <0 0>;
44 linux,rs485-enabled-at-boot-time;
45 rs485-rts-delay = <0 0>;
|
| /Linux-v6.6/drivers/usb/serial/ |
| D | xr_serial.c | 241 struct serial_rs485 rs485; member
651 rs485_enabled = !!(data->rs485.flags & SER_RS485_ENABLED); in xr_set_flow_mode()
655 if (data->rs485.flags & SER_RS485_RTS_ON_SEND) in xr_set_flow_mode()
825 static void xr_sanitize_serial_rs485(struct serial_rs485 *rs485) in xr_sanitize_serial_rs485() argument
827 if (!(rs485->flags & SER_RS485_ENABLED)) { in xr_sanitize_serial_rs485()
828 memset(rs485, 0, sizeof(*rs485)); in xr_sanitize_serial_rs485()
833 if (rs485->flags & SER_RS485_RTS_ON_SEND) in xr_sanitize_serial_rs485()
834 rs485->flags &= ~SER_RS485_RTS_AFTER_SEND; in xr_sanitize_serial_rs485()
836 rs485->flags |= SER_RS485_RTS_AFTER_SEND; in xr_sanitize_serial_rs485()
839 rs485->flags &= SER_RS485_ENABLED | SER_RS485_RTS_ON_SEND | in xr_sanitize_serial_rs485()
[all …]
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| /Linux-v6.6/arch/arm/boot/dts/ti/omap/ |
| D | am335x-nano.dts | 171 rs485-rts-active-high;
172 rs485-rx-during-tx;
173 rs485-rts-delay = <1 1>;
174 linux,rs485-enabled-at-boot-time;
182 rs485-rts-active-high;
183 rs485-rts-delay = <1 1>;
184 linux,rs485-enabled-at-boot-time;
191 rs485-rts-active-high;
192 rs485-rx-during-tx;
193 rs485-rts-delay = <1 1>;
[all …]
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| /Linux-v6.6/arch/arm/boot/dts/nxp/mxs/ |
| D | imx28-duckbill-2-485.dts | 15 rs485-red {
16 label = "duckbill:red:rs485";
20 rs485-green {
21 label = "duckbill:green:rs485";
|
| /Linux-v6.6/drivers/tty/serial/ |
| D | serial_core.c | 185 if (old != port->mctrl && !(port->rs485.flags & SER_RS485_ENABLED)) in uart_update_mctrl()
1304 static int uart_check_rs485_flags(struct uart_port *port, struct serial_rs485 *rs485) in uart_check_rs485_flags() argument
1306 u32 flags = rs485->flags; in uart_check_rs485_flags()
1319 if (!(rs485->flags & SER_RS485_ADDRB) && in uart_check_rs485_flags()
1320 (rs485->flags & (SER_RS485_ADDR_RECV|SER_RS485_ADDR_DEST))) in uart_check_rs485_flags()
1324 if (!(rs485->flags & SER_RS485_ADDR_RECV) && rs485->addr_recv) in uart_check_rs485_flags()
1326 if (!(rs485->flags & SER_RS485_ADDR_DEST) && rs485->addr_dest) in uart_check_rs485_flags()
1333 struct serial_rs485 *rs485) in uart_sanitize_serial_rs485_delays() argument
1336 if (rs485->delay_rts_before_send) { in uart_sanitize_serial_rs485_delays()
1341 rs485->delay_rts_before_send = 0; in uart_sanitize_serial_rs485_delays()
[all …]
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| D | omap-serial.c | 285 if (port->rs485.flags & SER_RS485_ENABLED) { in serial_omap_stop_tx()
296 res = (port->rs485.flags & SER_RS485_RTS_AFTER_SEND) ? in serial_omap_stop_tx()
299 if (port->rs485.delay_rts_after_send > 0) in serial_omap_stop_tx()
301 port->rs485.delay_rts_after_send); in serial_omap_stop_tx()
338 if ((up->port.rs485.flags & SER_RS485_ENABLED) && in serial_omap_put_char()
339 !(up->port.rs485.flags & SER_RS485_RX_DURING_TX)) in serial_omap_put_char()
367 if (port->rs485.flags & SER_RS485_ENABLED) { in serial_omap_start_tx()
373 res = (port->rs485.flags & SER_RS485_RTS_ON_SEND) ? 1 : 0; in serial_omap_start_tx()
376 if (port->rs485.delay_rts_before_send > 0) in serial_omap_start_tx()
377 mdelay(port->rs485.delay_rts_before_send); in serial_omap_start_tx()
[all …]
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| D | imx.c | 434 /* in rs485 mode disable transmitter */ in imx_uart_stop_tx()
435 if (port->rs485.flags & SER_RS485_ENABLED) { in imx_uart_stop_tx()
439 if (port->rs485.delay_rts_after_send > 0) { in imx_uart_stop_tx()
441 port->rs485.delay_rts_after_send); in imx_uart_stop_tx()
455 if (port->rs485.flags & SER_RS485_RTS_AFTER_SEND) in imx_uart_stop_tx()
492 if (port->rs485.flags & SER_RS485_ENABLED && in imx_uart_stop_rx()
493 port->rs485.flags & SER_RS485_RTS_ON_SEND && in imx_uart_stop_rx()
597 else if (sport->port.rs485.flags & SER_RS485_ENABLED) { in imx_uart_dma_tx_callback()
682 if (port->rs485.flags & SER_RS485_ENABLED) { in imx_uart_start_tx()
685 if (port->rs485.flags & SER_RS485_RTS_ON_SEND) in imx_uart_start_tx()
[all …]
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| /Linux-v6.6/arch/arm/boot/dts/nxp/imx/ |
| D | imx6qdl-dhcom-drc02.dtsi | 30 rs485-rx-en-hog {
33 line-name = "rs485-rx-en";
85 * On DRC02 this UART is used as RS485 interface and RS485_TX_En is
92 linux,rs485-enabled-at-boot-time;
122 * P: uart5 rs485-tx-en
123 * Q: uart5 rs485-rx-en
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| D | imx6ull-dhcom-drc02.dts | 59 rs485-rx-en-hog {
62 line-name = "rs485-rx-en";
94 /* Use UART as RS485 */
97 linux,rs485-enabled-at-boot-time;
|
| /Linux-v6.6/arch/arm64/boot/dts/freescale/ |
| D | imx8mm-verdin-dev.dtsi | 131 /* Verdin UART_1, connector X50 through RS485 transceiver */
133 linux,rs485-enabled-at-boot-time;
134 rs485-rts-active-low;
135 rs485-rx-during-tx;
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| D | imx8mm-venice-gw72xx-0x-rs422.dtso | 5 * GW72xx RS422 (RS485 full duplex):
9 * - UART4_TX is DE for RS485 transmitter
45 linux,rs485-enabled-at-boot-time;
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| D | imx8mm-venice-gw72xx-0x-rs485.dtso | 5 * GW72xx RS485 HD:
9 * - UART4_TX is DE for RS485 transmitter
45 linux,rs485-enabled-at-boot-time;
|
| D | imx8mm-venice-gw73xx-0x-rs422.dtso | 5 * GW73xx RS422 (RS485 full duplex):
9 * - UART4_TX is DE for RS485 transmitter
45 linux,rs485-enabled-at-boot-time;
|
| D | imx8mm-venice-gw73xx-0x-rs485.dtso | 5 * GW73xx RS485 HD:
9 * - UART4_TX is DE for RS485 transmitter
45 linux,rs485-enabled-at-boot-time;
|
| D | imx8mp-verdin-dev.dtsi | 171 /* Verdin UART_1, connector X50 through RS485 transceiver */
173 linux,rs485-enabled-at-boot-time;
174 rs485-rts-active-low;
175 rs485-rx-during-tx;
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| D | Makefile | 156 imx8mm-venice-gw72xx-0x-rs485-dtbs := imx8mm-venice-gw72xx-0x.dtb imx8mm-venice-gw72xx-0x-rs485.dtbo
161 imx8mm-venice-gw73xx-0x-rs485-dtbs := imx8mm-venice-gw73xx-0x.dtb imx8mm-venice-gw73xx-0x-rs485.dtbo
168 dtb-$(CONFIG_ARCH_MXC) += imx8mm-venice-gw72xx-0x-rs485.dtb
173 dtb-$(CONFIG_ARCH_MXC) += imx8mm-venice-gw73xx-0x-rs485.dtb
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| /Linux-v6.6/arch/arm/boot/dts/st/ |
| D | stm32mp15xx-dhcom-drc02.dtsi | 36 rs485-rx-en-hog {
40 line-name = "rs485-rx-en";
144 &uart8 { /* RS485 */
145 linux,rs485-enabled-at-boot-time;
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