Lines Matching refs:up
316 static u32 default_serial_dl_read(struct uart_8250_port *up) in default_serial_dl_read() argument
319 unsigned char dll = serial_in(up, UART_DLL); in default_serial_dl_read()
320 unsigned char dlm = serial_in(up, UART_DLM); in default_serial_dl_read()
326 static void default_serial_dl_write(struct uart_8250_port *up, u32 value) in default_serial_dl_write() argument
328 serial_out(up, UART_DLL, value & 0xff); in default_serial_dl_write()
329 serial_out(up, UART_DLM, value >> 8 & 0xff); in default_serial_dl_write()
422 struct uart_8250_port *up = up_to_u8250p(p); in set_io_from_upio() local
424 up->dl_read = default_serial_dl_read; in set_io_from_upio()
425 up->dl_write = default_serial_dl_write; in set_io_from_upio()
467 up->cur_iotype = p->iotype; in set_io_from_upio()
622 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_em485_config() local
629 return serial8250_em485_init(up); in serial8250_em485_config()
631 serial8250_em485_destroy(up); in serial8250_em485_config()
709 static void serial8250_clear_IER(struct uart_8250_port *up) in serial8250_clear_IER() argument
711 if (up->capabilities & UART_CAP_UUE) in serial8250_clear_IER()
712 serial_out(up, UART_IER, UART_IER_UUE); in serial8250_clear_IER()
714 serial_out(up, UART_IER, 0); in serial8250_clear_IER()
721 static int size_fifo(struct uart_8250_port *up) in size_fifo() argument
727 old_lcr = serial_in(up, UART_LCR); in size_fifo()
728 serial_out(up, UART_LCR, 0); in size_fifo()
729 old_fcr = serial_in(up, UART_FCR); in size_fifo()
730 old_mcr = serial8250_in_MCR(up); in size_fifo()
731 serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO | in size_fifo()
733 serial8250_out_MCR(up, UART_MCR_LOOP); in size_fifo()
734 serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A); in size_fifo()
735 old_dl = serial_dl_read(up); in size_fifo()
736 serial_dl_write(up, 0x0001); in size_fifo()
737 serial_out(up, UART_LCR, UART_LCR_WLEN8); in size_fifo()
739 serial_out(up, UART_TX, count); in size_fifo()
741 for (count = 0; (serial_in(up, UART_LSR) & UART_LSR_DR) && in size_fifo()
743 serial_in(up, UART_RX); in size_fifo()
744 serial_out(up, UART_FCR, old_fcr); in size_fifo()
745 serial8250_out_MCR(up, old_mcr); in size_fifo()
746 serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A); in size_fifo()
747 serial_dl_write(up, old_dl); in size_fifo()
748 serial_out(up, UART_LCR, old_lcr); in size_fifo()
785 static void autoconfig_has_efr(struct uart_8250_port *up) in autoconfig_has_efr() argument
792 up->capabilities |= UART_CAP_EFR | UART_CAP_SLEEP; in autoconfig_has_efr()
811 up->acr = 0; in autoconfig_has_efr()
812 serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); in autoconfig_has_efr()
813 serial_out(up, UART_EFR, UART_EFR_ECB); in autoconfig_has_efr()
814 serial_out(up, UART_LCR, 0x00); in autoconfig_has_efr()
815 id1 = serial_icr_read(up, UART_ID1); in autoconfig_has_efr()
816 id2 = serial_icr_read(up, UART_ID2); in autoconfig_has_efr()
817 id3 = serial_icr_read(up, UART_ID3); in autoconfig_has_efr()
818 rev = serial_icr_read(up, UART_REV); in autoconfig_has_efr()
822 up->port.type = PORT_16C950; in autoconfig_has_efr()
830 up->bugs |= UART_BUG_QUOT; in autoconfig_has_efr()
842 id1 = autoconfig_read_divisor_id(up); in autoconfig_has_efr()
846 up->port.type = PORT_16850; in autoconfig_has_efr()
859 if (size_fifo(up) == 64) in autoconfig_has_efr()
860 up->port.type = PORT_16654; in autoconfig_has_efr()
862 up->port.type = PORT_16650V2; in autoconfig_has_efr()
870 static void autoconfig_8250(struct uart_8250_port *up) in autoconfig_8250() argument
874 up->port.type = PORT_8250; in autoconfig_8250()
876 scratch = serial_in(up, UART_SCR); in autoconfig_8250()
877 serial_out(up, UART_SCR, 0xa5); in autoconfig_8250()
878 status1 = serial_in(up, UART_SCR); in autoconfig_8250()
879 serial_out(up, UART_SCR, 0x5a); in autoconfig_8250()
880 status2 = serial_in(up, UART_SCR); in autoconfig_8250()
881 serial_out(up, UART_SCR, scratch); in autoconfig_8250()
884 up->port.type = PORT_16450; in autoconfig_8250()
887 static int broken_efr(struct uart_8250_port *up) in broken_efr() argument
894 if (autoconfig_read_divisor_id(up) == 0x0201 && size_fifo(up) == 16) in broken_efr()
906 static void autoconfig_16550a(struct uart_8250_port *up) in autoconfig_16550a() argument
912 lockdep_assert_held_once(&up->port.lock); in autoconfig_16550a()
914 up->port.type = PORT_16550A; in autoconfig_16550a()
915 up->capabilities |= UART_CAP_FIFO; in autoconfig_16550a()
918 !(up->port.flags & UPF_FULL_PROBE)) in autoconfig_16550a()
925 serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A); in autoconfig_16550a()
926 if (serial_in(up, UART_EFR) == 0) { in autoconfig_16550a()
927 serial_out(up, UART_EFR, 0xA8); in autoconfig_16550a()
928 if (serial_in(up, UART_EFR) != 0) { in autoconfig_16550a()
929 up->port.type = PORT_16650; in autoconfig_16550a()
930 up->capabilities |= UART_CAP_EFR | UART_CAP_SLEEP; in autoconfig_16550a()
932 serial_out(up, UART_LCR, 0); in autoconfig_16550a()
933 serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO | in autoconfig_16550a()
935 status1 = serial_in(up, UART_IIR) & UART_IIR_FIFO_ENABLED_16750; in autoconfig_16550a()
936 serial_out(up, UART_FCR, 0); in autoconfig_16550a()
937 serial_out(up, UART_LCR, 0); in autoconfig_16550a()
940 up->port.type = PORT_16550A_FSL64; in autoconfig_16550a()
942 serial_out(up, UART_EFR, 0); in autoconfig_16550a()
950 serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); in autoconfig_16550a()
951 if (serial_in(up, UART_EFR) == 0 && !broken_efr(up)) { in autoconfig_16550a()
952 autoconfig_has_efr(up); in autoconfig_16550a()
963 serial_out(up, UART_LCR, 0); in autoconfig_16550a()
964 status1 = serial8250_in_MCR(up); in autoconfig_16550a()
965 serial_out(up, UART_LCR, 0xE0); in autoconfig_16550a()
966 status2 = serial_in(up, 0x02); /* EXCR1 */ in autoconfig_16550a()
969 serial_out(up, UART_LCR, 0); in autoconfig_16550a()
970 serial8250_out_MCR(up, status1 ^ UART_MCR_LOOP); in autoconfig_16550a()
971 serial_out(up, UART_LCR, 0xE0); in autoconfig_16550a()
972 status2 = serial_in(up, 0x02); /* EXCR1 */ in autoconfig_16550a()
973 serial_out(up, UART_LCR, 0); in autoconfig_16550a()
974 serial8250_out_MCR(up, status1); in autoconfig_16550a()
979 serial_out(up, UART_LCR, 0xE0); in autoconfig_16550a()
981 quot = serial_dl_read(up); in autoconfig_16550a()
984 if (ns16550a_goto_highspeed(up)) in autoconfig_16550a()
985 serial_dl_write(up, quot); in autoconfig_16550a()
987 serial_out(up, UART_LCR, 0); in autoconfig_16550a()
989 up->port.uartclk = 921600*16; in autoconfig_16550a()
990 up->port.type = PORT_NS16550A; in autoconfig_16550a()
991 up->capabilities |= UART_NATSEMI; in autoconfig_16550a()
1002 serial_out(up, UART_LCR, 0); in autoconfig_16550a()
1003 serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO | UART_FCR7_64BYTE); in autoconfig_16550a()
1004 status1 = serial_in(up, UART_IIR) & UART_IIR_FIFO_ENABLED_16750; in autoconfig_16550a()
1005 serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO); in autoconfig_16550a()
1007 serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A); in autoconfig_16550a()
1008 serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO | UART_FCR7_64BYTE); in autoconfig_16550a()
1009 status2 = serial_in(up, UART_IIR) & UART_IIR_FIFO_ENABLED_16750; in autoconfig_16550a()
1010 serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO); in autoconfig_16550a()
1012 serial_out(up, UART_LCR, 0); in autoconfig_16550a()
1016 up->port.type = PORT_16750; in autoconfig_16550a()
1017 up->capabilities |= UART_CAP_AFE | UART_CAP_SLEEP; in autoconfig_16550a()
1029 iersave = serial_in(up, UART_IER); in autoconfig_16550a()
1030 serial_out(up, UART_IER, iersave & ~UART_IER_UUE); in autoconfig_16550a()
1031 if (!(serial_in(up, UART_IER) & UART_IER_UUE)) { in autoconfig_16550a()
1036 serial_out(up, UART_IER, iersave | UART_IER_UUE); in autoconfig_16550a()
1037 if (serial_in(up, UART_IER) & UART_IER_UUE) { in autoconfig_16550a()
1042 up->port.type = PORT_XSCALE; in autoconfig_16550a()
1043 up->capabilities |= UART_CAP_UUE | UART_CAP_RTOIE; in autoconfig_16550a()
1047 serial_out(up, UART_IER, iersave); in autoconfig_16550a()
1053 if (up->port.type == PORT_16550A && size_fifo(up) == 64) { in autoconfig_16550a()
1054 up->port.type = PORT_U6_16550A; in autoconfig_16550a()
1055 up->capabilities |= UART_CAP_AFE; in autoconfig_16550a()
1066 static void autoconfig(struct uart_8250_port *up) in autoconfig() argument
1070 struct uart_port *port = &up->port; in autoconfig()
1085 up->capabilities = 0; in autoconfig()
1086 up->bugs = 0; in autoconfig()
1102 scratch = serial_in(up, UART_IER); in autoconfig()
1103 serial_out(up, UART_IER, 0); in autoconfig()
1111 scratch2 = serial_in(up, UART_IER) & UART_IER_ALL_INTR; in autoconfig()
1112 serial_out(up, UART_IER, UART_IER_ALL_INTR); in autoconfig()
1116 scratch3 = serial_in(up, UART_IER) & UART_IER_ALL_INTR; in autoconfig()
1117 serial_out(up, UART_IER, scratch); in autoconfig()
1127 save_mcr = serial8250_in_MCR(up); in autoconfig()
1128 save_lcr = serial_in(up, UART_LCR); in autoconfig()
1140 serial8250_out_MCR(up, UART_MCR_LOOP | UART_MCR_OUT2 | UART_MCR_RTS); in autoconfig()
1141 status1 = serial_in(up, UART_MSR) & UART_MSR_STATUS_BITS; in autoconfig()
1142 serial8250_out_MCR(up, save_mcr); in autoconfig()
1158 serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); in autoconfig()
1159 serial_out(up, UART_EFR, 0); in autoconfig()
1160 serial_out(up, UART_LCR, 0); in autoconfig()
1162 serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO); in autoconfig()
1164 switch (serial_in(up, UART_IIR) & UART_IIR_FIFO_ENABLED) { in autoconfig()
1166 autoconfig_8250(up); in autoconfig()
1172 autoconfig_16550a(up); in autoconfig()
1179 rsa_autoconfig(up); in autoconfig()
1181 serial_out(up, UART_LCR, save_lcr); in autoconfig()
1183 port->fifosize = uart_config[up->port.type].fifo_size; in autoconfig()
1184 old_capabilities = up->capabilities; in autoconfig()
1185 up->capabilities = uart_config[port->type].flags; in autoconfig()
1186 up->tx_loadsz = uart_config[port->type].tx_loadsz; in autoconfig()
1192 rsa_reset(up); in autoconfig()
1193 serial8250_out_MCR(up, save_mcr); in autoconfig()
1194 serial8250_clear_fifos(up); in autoconfig()
1195 serial_in(up, UART_RX); in autoconfig()
1196 serial8250_clear_IER(up); in autoconfig()
1205 fintek_8250_probe(up); in autoconfig()
1207 if (up->capabilities != old_capabilities) { in autoconfig()
1209 old_capabilities, up->capabilities); in autoconfig()
1213 static void autoconfig_irq(struct uart_8250_port *up) in autoconfig_irq() argument
1215 struct uart_port *port = &up->port; in autoconfig_irq()
1231 save_mcr = serial8250_in_MCR(up); in autoconfig_irq()
1234 save_ier = serial_in(up, UART_IER); in autoconfig_irq()
1235 serial8250_out_MCR(up, UART_MCR_OUT1 | UART_MCR_OUT2); in autoconfig_irq()
1238 serial8250_out_MCR(up, 0); in autoconfig_irq()
1241 serial8250_out_MCR(up, UART_MCR_DTR | UART_MCR_RTS); in autoconfig_irq()
1243 serial8250_out_MCR(up, in autoconfig_irq()
1248 serial_out(up, UART_IER, UART_IER_ALL_INTR); in autoconfig_irq()
1250 serial_out(up, UART_TX, 0xFF); in autoconfig_irq()
1254 serial8250_out_MCR(up, save_mcr); in autoconfig_irq()
1257 serial_out(up, UART_IER, save_ier); in autoconfig_irq()
1267 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_stop_rx() local
1272 guard(serial8250_rpm)(up); in serial8250_stop_rx()
1274 up->ier &= ~(UART_IER_RLSI | UART_IER_RDI); in serial8250_stop_rx()
1275 serial_port_out(port, UART_IER, up->ier); in serial8250_stop_rx()
1400 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_stop_tx() local
1402 guard(serial8250_rpm)(up); in serial8250_stop_tx()
1403 __stop_tx(up); in serial8250_stop_tx()
1409 up->acr |= UART_ACR_TXDIS; in serial8250_stop_tx()
1410 serial_icr_write(up, UART_ACR, up->acr); in serial8250_stop_tx()
1416 struct uart_8250_port *up = up_to_u8250p(port); in __start_tx() local
1418 if (up->dma && !up->dma->tx_dma(up)) in __start_tx()
1421 if (serial8250_set_THRI(up)) { in __start_tx()
1422 if (up->bugs & UART_BUG_TXEN) { in __start_tx()
1423 u16 lsr = serial_lsr_in(up); in __start_tx()
1426 serial8250_tx_chars(up); in __start_tx()
1433 if (port->type == PORT_16C950 && up->acr & UART_ACR_TXDIS) { in __start_tx()
1434 up->acr &= ~UART_ACR_TXDIS; in __start_tx()
1435 serial_icr_write(up, UART_ACR, up->acr); in __start_tx()
1450 void serial8250_em485_start_tx(struct uart_8250_port *up, bool toggle_ier) in serial8250_em485_start_tx() argument
1452 unsigned char mcr = serial8250_in_MCR(up); in serial8250_em485_start_tx()
1454 if (!(up->port.rs485.flags & SER_RS485_RX_DURING_TX) && toggle_ier) in serial8250_em485_start_tx()
1455 serial8250_stop_rx(&up->port); in serial8250_em485_start_tx()
1457 if (up->port.rs485.flags & SER_RS485_RTS_ON_SEND) in serial8250_em485_start_tx()
1461 serial8250_out_MCR(up, mcr); in serial8250_em485_start_tx()
1468 struct uart_8250_port *up = up_to_u8250p(port); in start_tx_rs485() local
1469 struct uart_8250_em485 *em485 = up->em485; in start_tx_rs485()
1488 up->rs485_start_tx(up, true); in start_tx_rs485()
1490 if (up->port.rs485.delay_rts_before_send > 0) { in start_tx_rs485()
1493 up->port.rs485.delay_rts_before_send); in start_tx_rs485()
1519 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_start_tx() local
1520 struct uart_8250_em485 *em485 = up->em485; in serial8250_start_tx()
1528 serial8250_rpm_get_tx(up); in serial8250_start_tx()
1550 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_disable_ms() local
1556 if (up->bugs & UART_BUG_NOMSR) in serial8250_disable_ms()
1559 mctrl_gpio_disable_ms_no_sync(up->gpios); in serial8250_disable_ms()
1561 up->ier &= ~UART_IER_MSI; in serial8250_disable_ms()
1562 serial_port_out(port, UART_IER, up->ier); in serial8250_disable_ms()
1567 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_enable_ms() local
1573 if (up->bugs & UART_BUG_NOMSR) in serial8250_enable_ms()
1576 mctrl_gpio_enable_ms(up->gpios); in serial8250_enable_ms()
1578 up->ier |= UART_IER_MSI; in serial8250_enable_ms()
1580 guard(serial8250_rpm)(up); in serial8250_enable_ms()
1581 serial_port_out(port, UART_IER, up->ier); in serial8250_enable_ms()
1584 void serial8250_read_char(struct uart_8250_port *up, u16 lsr) in serial8250_read_char() argument
1586 struct uart_port *port = &up->port; in serial8250_read_char()
1590 ch = serial_in(up, UART_RX); in serial8250_read_char()
1603 lsr |= up->lsr_saved_flags; in serial8250_read_char()
1604 up->lsr_saved_flags = 0; in serial8250_read_char()
1652 u16 serial8250_rx_chars(struct uart_8250_port *up, u16 lsr) in serial8250_rx_chars() argument
1654 struct uart_port *port = &up->port; in serial8250_rx_chars()
1658 serial8250_read_char(up, lsr); in serial8250_rx_chars()
1661 lsr = serial_in(up, UART_LSR); in serial8250_rx_chars()
1669 void serial8250_tx_chars(struct uart_8250_port *up) in serial8250_tx_chars() argument
1671 struct uart_port *port = &up->port; in serial8250_tx_chars()
1684 __stop_tx(up); in serial8250_tx_chars()
1688 count = up->tx_loadsz; in serial8250_tx_chars()
1695 serial_out(up, UART_TX, c); in serial8250_tx_chars()
1696 if (up->bugs & UART_BUG_TXRACE) { in serial8250_tx_chars()
1706 serial_in(up, UART_SCR); in serial8250_tx_chars()
1709 if ((up->capabilities & UART_CAP_HFIFO) && in serial8250_tx_chars()
1710 !uart_lsr_tx_empty(serial_in(up, UART_LSR))) in serial8250_tx_chars()
1713 if ((up->capabilities & UART_CAP_MINI) && in serial8250_tx_chars()
1714 !(serial_in(up, UART_LSR) & UART_LSR_THRE)) in serial8250_tx_chars()
1727 !(up->capabilities & UART_CAP_RPM)) in serial8250_tx_chars()
1728 __stop_tx(up); in serial8250_tx_chars()
1733 unsigned int serial8250_modem_status(struct uart_8250_port *up) in serial8250_modem_status() argument
1735 struct uart_port *port = &up->port; in serial8250_modem_status()
1736 unsigned int status = serial_in(up, UART_MSR); in serial8250_modem_status()
1738 status |= up->msr_saved_flags; in serial8250_modem_status()
1739 up->msr_saved_flags = 0; in serial8250_modem_status()
1740 if (status & UART_MSR_ANY_DELTA && up->ier & UART_IER_MSI && in serial8250_modem_status()
1758 static bool handle_rx_dma(struct uart_8250_port *up, unsigned int iir) in handle_rx_dma() argument
1773 if (!up->dma->rx_running) in handle_rx_dma()
1778 serial8250_rx_dma_flush(up); in handle_rx_dma()
1781 return up->dma->rx_dma(up); in handle_rx_dma()
1789 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_handle_irq() local
1800 status = serial_lsr_in(up); in serial8250_handle_irq()
1812 !(up->ier & (UART_IER_RLSI | UART_IER_RDI))) in serial8250_handle_irq()
1821 if (!up->dma || handle_rx_dma(up, iir)) in serial8250_handle_irq()
1822 status = serial8250_rx_chars(up, status); in serial8250_handle_irq()
1824 serial8250_modem_status(up); in serial8250_handle_irq()
1825 if ((status & UART_LSR_THRE) && (up->ier & UART_IER_THRI)) { in serial8250_handle_irq()
1826 if (!up->dma || up->dma->tx_err) in serial8250_handle_irq()
1827 serial8250_tx_chars(up); in serial8250_handle_irq()
1828 else if (!up->dma->tx_running) in serial8250_handle_irq()
1829 __stop_tx(up); in serial8250_handle_irq()
1840 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_default_handle_irq() local
1843 guard(serial8250_rpm)(up); in serial8250_default_handle_irq()
1861 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_tx_threshold_handle_irq() local
1864 serial8250_tx_chars(up); in serial8250_tx_threshold_handle_irq()
1873 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_tx_empty() local
1875 guard(serial8250_rpm)(up); in serial8250_tx_empty()
1878 if (!serial8250_tx_dma_running(up) && uart_lsr_tx_empty(serial_lsr_in(up))) in serial8250_tx_empty()
1886 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_do_get_mctrl() local
1890 scoped_guard(serial8250_rpm, up) in serial8250_do_get_mctrl()
1891 status = serial8250_modem_status(up); in serial8250_do_get_mctrl()
1894 if (up->gpios) in serial8250_do_get_mctrl()
1895 return mctrl_gpio_get(up->gpios, &val); in serial8250_do_get_mctrl()
1910 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_do_set_mctrl() local
1915 mcr |= up->mcr; in serial8250_do_set_mctrl()
1917 serial8250_out_MCR(up, mcr); in serial8250_do_set_mctrl()
1934 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_break_ctl() local
1936 guard(serial8250_rpm)(up); in serial8250_break_ctl()
1940 up->lcr |= UART_LCR_SBC; in serial8250_break_ctl()
1942 up->lcr &= ~UART_LCR_SBC; in serial8250_break_ctl()
1943 serial_port_out(port, UART_LCR, up->lcr); in serial8250_break_ctl()
1947 static bool wait_for_lsr(struct uart_8250_port *up, int bits) in wait_for_lsr() argument
1955 if (up->port.frame_time) in wait_for_lsr()
1956 tmout = up->port.frame_time * 2 / NSEC_PER_USEC; in wait_for_lsr()
1961 status = serial_lsr_in(up); in wait_for_lsr()
1975 static void wait_for_xmitr(struct uart_8250_port *up, int bits) in wait_for_xmitr() argument
1979 wait_for_lsr(up, bits); in wait_for_xmitr()
1982 if (up->port.flags & UPF_CONS_FLOW) { in wait_for_xmitr()
1984 unsigned int msr = serial_in(up, UART_MSR); in wait_for_xmitr()
1985 up->msr_saved_flags |= msr & MSR_SAVE_FLAGS; in wait_for_xmitr()
2002 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_get_poll_char() local
2005 guard(serial8250_rpm)(up); in serial8250_get_poll_char()
2019 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_put_poll_char() local
2029 guard(serial8250_rpm)(up); in serial8250_put_poll_char()
2034 serial8250_clear_IER(up); in serial8250_put_poll_char()
2036 wait_for_xmitr(up, UART_LSR_BOTH_EMPTY); in serial8250_put_poll_char()
2046 wait_for_xmitr(up, UART_LSR_BOTH_EMPTY); in serial8250_put_poll_char()
2054 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_startup_special() local
2064 up->acr = 0; in serial8250_startup_special()
2069 serial_icr_write(up, UART_CSR, 0); /* Reset the UART */ in serial8250_startup_special()
2094 rsa_enable(up); in serial8250_startup_special()
2101 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_set_TRG_levels() local
2108 serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); in serial8250_set_TRG_levels()
2110 fctr = serial_in(up, UART_FCTR) & ~(UART_FCTR_RX|UART_FCTR_TX); in serial8250_set_TRG_levels()
2128 if (up->tx_loadsz < 2 || up->tx_loadsz > port->fifosize) { in serial8250_set_TRG_levels()
2133 serial_port_out(port, UART_ALTR_TX_LOW, port->fifosize - up->tx_loadsz); in serial8250_set_TRG_levels()
2141 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_THRE_test() local
2147 if (up->port.flags & UPF_NO_THRE_TEST) in serial8250_THRE_test()
2162 wait_for_xmitr(up, UART_LSR_THRE); in serial8250_THRE_test()
2180 if ((!iir_noint1 && iir_noint2) || up->port.flags & UPF_BUG_THRE) in serial8250_THRE_test()
2181 up->bugs |= UART_BUG_THRE; in serial8250_THRE_test()
2200 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_iir_txen_test() local
2222 if (!(up->bugs & UART_BUG_TXEN)) { in serial8250_iir_txen_test()
2223 up->bugs |= UART_BUG_TXEN; in serial8250_iir_txen_test()
2230 up->bugs &= ~UART_BUG_TXEN; in serial8250_iir_txen_test()
2244 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_do_startup() local
2249 if (!up->tx_loadsz) in serial8250_do_startup()
2250 up->tx_loadsz = uart_config[port->type].tx_loadsz; in serial8250_do_startup()
2251 if (!up->capabilities) in serial8250_do_startup()
2252 up->capabilities = uart_config[port->type].flags; in serial8250_do_startup()
2253 up->mcr = 0; in serial8250_do_startup()
2255 if (port->iotype != up->cur_iotype) in serial8250_do_startup()
2258 guard(serial8250_rpm)(up); in serial8250_do_startup()
2266 serial8250_clear_fifos(up); in serial8250_do_startup()
2284 if (port->irq && (up->port.flags & UPF_SHARE_IRQ)) in serial8250_do_startup()
2285 up->port.irqflags |= IRQF_SHARED; in serial8250_do_startup()
2287 retval = up->ops->setup_irq(up); in serial8250_do_startup()
2293 up->ops->setup_timer(up); in serial8250_do_startup()
2303 up->lsr_saved_flags = 0; in serial8250_do_startup()
2304 up->msr_saved_flags = 0; in serial8250_do_startup()
2309 if (up->dma) { in serial8250_do_startup()
2314 else if (serial8250_request_dma(up)) in serial8250_do_startup()
2318 up->dma = NULL; in serial8250_do_startup()
2327 up->ier = UART_IER_RLSI | UART_IER_RDI; in serial8250_do_startup()
2352 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_do_shutdown() local
2354 serial8250_rpm_get(up); in serial8250_do_shutdown()
2361 up->ier = 0; in serial8250_do_shutdown()
2367 if (up->dma) in serial8250_do_shutdown()
2368 serial8250_release_dma(up); in serial8250_do_shutdown()
2386 serial8250_clear_fifos(up); in serial8250_do_shutdown()
2388 rsa_disable(up); in serial8250_do_shutdown()
2395 serial8250_rpm_put(up); in serial8250_do_shutdown()
2397 up->ops->release_irq(up); in serial8250_do_shutdown()
2411 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_flush_buffer() local
2413 if (up->dma) in serial8250_flush_buffer()
2414 serial8250_tx_dma_flush(up); in serial8250_flush_buffer()
2420 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_do_get_divisor() local
2465 if (up->bugs & UART_BUG_QUOT && (quot & 0xff) == 0) in serial8250_do_get_divisor()
2481 static unsigned char serial8250_compute_lcr(struct uart_8250_port *up, tcflag_t c_cflag) in serial8250_compute_lcr() argument
2500 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_do_set_divisor() local
2503 if (is_omap1510_8250(up)) { in serial8250_do_set_divisor()
2515 if (up->capabilities & UART_NATSEMI) in serial8250_do_set_divisor()
2518 serial_port_out(port, UART_LCR, up->lcr | UART_LCR_DLAB); in serial8250_do_set_divisor()
2520 serial_dl_write(up, quot); in serial8250_do_set_divisor()
2597 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_set_mini() local
2599 if (!(up->capabilities & UART_CAP_MINI)) in serial8250_set_mini()
2614 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_set_trigger_for_slow_speed() local
2616 if (!(up->capabilities & UART_CAP_FIFO)) in serial8250_set_trigger_for_slow_speed()
2622 if (up->dma) in serial8250_set_trigger_for_slow_speed()
2625 up->fcr &= ~UART_FCR_TRIGGER_MASK; in serial8250_set_trigger_for_slow_speed()
2626 up->fcr |= UART_FCR_TRIGGER_1; in serial8250_set_trigger_for_slow_speed()
2635 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_set_afe() local
2637 if (!(up->capabilities & UART_CAP_AFE)) in serial8250_set_afe()
2640 up->mcr &= ~UART_MCR_AFE; in serial8250_set_afe()
2642 up->mcr |= UART_MCR_AFE; in serial8250_set_afe()
2679 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_set_ier() local
2682 up->ier &= ~UART_IER_MSI; in serial8250_set_ier()
2683 if (!(up->bugs & UART_BUG_NOMSR) && UART_ENABLE_MS(&up->port, termios->c_cflag)) in serial8250_set_ier()
2684 up->ier |= UART_IER_MSI; in serial8250_set_ier()
2685 if (up->capabilities & UART_CAP_UUE) in serial8250_set_ier()
2686 up->ier |= UART_IER_UUE; in serial8250_set_ier()
2687 if (up->capabilities & UART_CAP_RTOIE) in serial8250_set_ier()
2688 up->ier |= UART_IER_RTOIE; in serial8250_set_ier()
2690 serial_port_out(port, UART_IER, up->ier); in serial8250_set_ier()
2695 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_set_efr() local
2699 if (!(up->capabilities & UART_CAP_EFR)) in serial8250_set_efr()
2719 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_set_fcr() local
2723 serial_port_out(port, UART_FCR, up->fcr); in serial8250_set_fcr()
2729 serial_port_out(port, UART_LCR, up->lcr); in serial8250_set_fcr()
2735 if (up->fcr & UART_FCR_ENABLE_FIFO) in serial8250_set_fcr()
2738 serial_port_out(port, UART_FCR, up->fcr); in serial8250_set_fcr()
2745 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_do_set_termios() local
2750 lcr = serial8250_compute_lcr(up, termios->c_cflag); in serial8250_do_set_termios()
2759 scoped_guard(serial8250_rpm, up) { in serial8250_do_set_termios()
2762 up->lcr = lcr; in serial8250_do_set_termios()
2847 static int serial8250_request_std_resource(struct uart_8250_port *up) in serial8250_request_std_resource() argument
2849 unsigned int size = serial8250_port_size(up); in serial8250_request_std_resource()
2850 struct uart_port *port = &up->port; in serial8250_request_std_resource()
2885 static void serial8250_release_std_resource(struct uart_8250_port *up) in serial8250_release_std_resource() argument
2887 unsigned int size = serial8250_port_size(up); in serial8250_release_std_resource()
2888 struct uart_port *port = &up->port; in serial8250_release_std_resource()
2919 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_release_port() local
2921 serial8250_release_std_resource(up); in serial8250_release_port()
2926 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_request_port() local
2928 return serial8250_request_std_resource(up); in serial8250_request_port()
2931 static int fcr_get_rxtrig_bytes(struct uart_8250_port *up) in fcr_get_rxtrig_bytes() argument
2933 const struct serial8250_config *conf_type = &uart_config[up->port.type]; in fcr_get_rxtrig_bytes()
2936 bytes = conf_type->rxtrig_bytes[UART_FCR_R_TRIG_BITS(up->fcr)]; in fcr_get_rxtrig_bytes()
2941 static int bytes_to_fcr_rxtrig(struct uart_8250_port *up, unsigned char bytes) in bytes_to_fcr_rxtrig() argument
2943 const struct serial8250_config *conf_type = &uart_config[up->port.type]; in bytes_to_fcr_rxtrig()
2962 struct uart_8250_port *up = up_to_u8250p(uport); in do_get_rxtrig() local
2964 if (!(up->capabilities & UART_CAP_FIFO) || uport->fifosize <= 1) in do_get_rxtrig()
2967 return fcr_get_rxtrig_bytes(up); in do_get_rxtrig()
2998 struct uart_8250_port *up = up_to_u8250p(uport); in do_set_rxtrig() local
3001 if (!(up->capabilities & UART_CAP_FIFO) || uport->fifosize <= 1) in do_set_rxtrig()
3004 rxtrig = bytes_to_fcr_rxtrig(up, bytes); in do_set_rxtrig()
3008 serial8250_clear_fifos(up); in do_set_rxtrig()
3009 up->fcr &= ~UART_FCR_TRIGGER_MASK; in do_set_rxtrig()
3010 up->fcr |= (unsigned char)rxtrig; in do_set_rxtrig()
3011 serial_out(up, UART_FCR, up->fcr); in do_set_rxtrig()
3058 static void register_dev_spec_attr_grp(struct uart_8250_port *up) in register_dev_spec_attr_grp() argument
3060 const struct serial8250_config *conf_type = &uart_config[up->port.type]; in register_dev_spec_attr_grp()
3063 up->port.attr_group = &serial8250_dev_attr_group; in register_dev_spec_attr_grp()
3068 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_config_port() local
3075 ret = serial8250_request_std_resource(up); in serial8250_config_port()
3079 if (port->iotype != up->cur_iotype) in serial8250_config_port()
3083 autoconfig(up); in serial8250_config_port()
3087 up->bugs |= UART_BUG_NOMSR; in serial8250_config_port()
3090 autoconfig_irq(up); in serial8250_config_port()
3093 serial8250_release_std_resource(up); in serial8250_config_port()
3095 register_dev_spec_attr_grp(up); in serial8250_config_port()
3096 up->fcr = uart_config[up->port.type].fcr; in serial8250_config_port()
3147 void serial8250_init_port(struct uart_8250_port *up) in serial8250_init_port() argument
3149 struct uart_port *port = &up->port; in serial8250_init_port()
3157 up->cur_iotype = UPIO_UNKNOWN; in serial8250_init_port()
3161 void serial8250_set_defaults(struct uart_8250_port *up) in serial8250_set_defaults() argument
3163 struct uart_port *port = &up->port; in serial8250_set_defaults()
3165 if (up->port.flags & UPF_FIXED_TYPE) { in serial8250_set_defaults()
3166 unsigned int type = up->port.type; in serial8250_set_defaults()
3168 if (!up->port.fifosize) in serial8250_set_defaults()
3169 up->port.fifosize = uart_config[type].fifo_size; in serial8250_set_defaults()
3170 if (!up->tx_loadsz) in serial8250_set_defaults()
3171 up->tx_loadsz = uart_config[type].tx_loadsz; in serial8250_set_defaults()
3172 if (!up->capabilities) in serial8250_set_defaults()
3173 up->capabilities = uart_config[type].flags; in serial8250_set_defaults()
3179 if (up->dma) { in serial8250_set_defaults()
3180 if (!up->dma->tx_dma) in serial8250_set_defaults()
3181 up->dma->tx_dma = serial8250_tx_dma; in serial8250_set_defaults()
3182 if (!up->dma->rx_dma) in serial8250_set_defaults()
3183 up->dma->rx_dma = serial8250_rx_dma; in serial8250_set_defaults()
3197 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_console_wait_putchar() local
3199 wait_for_xmitr(up, UART_LSR_THRE); in serial8250_console_wait_putchar()
3206 static void serial8250_console_restore(struct uart_8250_port *up) in serial8250_console_restore() argument
3208 struct uart_port *port = &up->port; in serial8250_console_restore()
3225 serial_port_out(port, UART_LCR, up->lcr); in serial8250_console_restore()
3226 serial8250_out_MCR(up, up->mcr | UART_MCR_DTR | UART_MCR_RTS); in serial8250_console_restore()
3229 static void fifo_wait_for_lsr(struct uart_8250_port *up, unsigned int count) in fifo_wait_for_lsr() argument
3234 if (wait_for_lsr(up, UART_LSR_THRE)) in fifo_wait_for_lsr()
3245 static void serial8250_console_fifo_write(struct uart_8250_port *up, in serial8250_console_fifo_write() argument
3249 unsigned int fifosize = up->tx_loadsz; in serial8250_console_fifo_write()
3250 struct uart_port *port = &up->port; in serial8250_console_fifo_write()
3257 fifo_wait_for_lsr(up, fifosize); in serial8250_console_fifo_write()
3275 fifo_wait_for_lsr(up, tx_count); in serial8250_console_fifo_write()
3287 void serial8250_console_write(struct uart_8250_port *up, const char *s, in serial8250_console_write() argument
3290 struct uart_8250_em485 *em485 = up->em485; in serial8250_console_write()
3291 struct uart_port *port = &up->port; in serial8250_console_write()
3307 serial8250_clear_IER(up); in serial8250_console_write()
3310 if (up->canary && (up->canary != serial_port_in(port, UART_SCR))) { in serial8250_console_write()
3311 serial8250_console_restore(up); in serial8250_console_write()
3312 up->canary = 0; in serial8250_console_write()
3317 up->rs485_start_tx(up, false); in serial8250_console_write()
3321 use_fifo = (up->capabilities & UART_CAP_FIFO) && in serial8250_console_write()
3326 !(up->capabilities & UART_CAP_MINI) && in serial8250_console_write()
3330 up->tx_loadsz > 1 && in serial8250_console_write()
3331 (up->fcr & UART_FCR_ENABLE_FIFO) && in serial8250_console_write()
3339 !(up->port.flags & UPF_CONS_FLOW); in serial8250_console_write()
3342 serial8250_console_fifo_write(up, s, count); in serial8250_console_write()
3350 wait_for_xmitr(up, UART_LSR_BOTH_EMPTY); in serial8250_console_write()
3355 up->rs485_stop_tx(up, false); in serial8250_console_write()
3367 if (up->msr_saved_flags) in serial8250_console_write()
3368 serial8250_modem_status(up); in serial8250_console_write()