Lines Matching refs:up
325 static u32 default_serial_dl_read(struct uart_8250_port *up) in default_serial_dl_read() argument
328 unsigned char dll = serial_in(up, UART_DLL); in default_serial_dl_read()
329 unsigned char dlm = serial_in(up, UART_DLM); in default_serial_dl_read()
335 static void default_serial_dl_write(struct uart_8250_port *up, u32 value) in default_serial_dl_write() argument
337 serial_out(up, UART_DLL, value & 0xff); in default_serial_dl_write()
338 serial_out(up, UART_DLM, value >> 8 & 0xff); in default_serial_dl_write()
431 struct uart_8250_port *up = up_to_u8250p(p); in set_io_from_upio() local
433 up->dl_read = default_serial_dl_read; in set_io_from_upio()
434 up->dl_write = default_serial_dl_write; in set_io_from_upio()
476 up->cur_iotype = p->iotype; in set_io_from_upio()
633 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_em485_config() local
640 return serial8250_em485_init(up); in serial8250_em485_config()
642 serial8250_em485_destroy(up); in serial8250_em485_config()
714 static void serial8250_clear_IER(struct uart_8250_port *up) in serial8250_clear_IER() argument
716 if (up->capabilities & UART_CAP_UUE) in serial8250_clear_IER()
717 serial_out(up, UART_IER, UART_IER_UUE); in serial8250_clear_IER()
719 serial_out(up, UART_IER, 0); in serial8250_clear_IER()
727 static int __enable_rsa(struct uart_8250_port *up) in __enable_rsa() argument
732 mode = serial_in(up, UART_RSA_MSR); in __enable_rsa()
736 serial_out(up, UART_RSA_MSR, mode | UART_RSA_MSR_FIFO); in __enable_rsa()
737 mode = serial_in(up, UART_RSA_MSR); in __enable_rsa()
742 up->port.uartclk = SERIAL_RSA_BAUD_BASE * 16; in __enable_rsa()
747 static void enable_rsa(struct uart_8250_port *up) in enable_rsa() argument
749 if (up->port.type == PORT_RSA) { in enable_rsa()
750 if (up->port.uartclk != SERIAL_RSA_BAUD_BASE * 16) { in enable_rsa()
751 uart_port_lock_irq(&up->port); in enable_rsa()
752 __enable_rsa(up); in enable_rsa()
753 uart_port_unlock_irq(&up->port); in enable_rsa()
755 if (up->port.uartclk == SERIAL_RSA_BAUD_BASE * 16) in enable_rsa()
756 serial_out(up, UART_RSA_FRR, 0); in enable_rsa()
766 static void disable_rsa(struct uart_8250_port *up) in disable_rsa() argument
771 if (up->port.type == PORT_RSA && in disable_rsa()
772 up->port.uartclk == SERIAL_RSA_BAUD_BASE * 16) { in disable_rsa()
773 uart_port_lock_irq(&up->port); in disable_rsa()
775 mode = serial_in(up, UART_RSA_MSR); in disable_rsa()
779 serial_out(up, UART_RSA_MSR, mode & ~UART_RSA_MSR_FIFO); in disable_rsa()
780 mode = serial_in(up, UART_RSA_MSR); in disable_rsa()
785 up->port.uartclk = SERIAL_RSA_BAUD_BASE_LO * 16; in disable_rsa()
786 uart_port_unlock_irq(&up->port); in disable_rsa()
795 static int size_fifo(struct uart_8250_port *up) in size_fifo() argument
801 old_lcr = serial_in(up, UART_LCR); in size_fifo()
802 serial_out(up, UART_LCR, 0); in size_fifo()
803 old_fcr = serial_in(up, UART_FCR); in size_fifo()
804 old_mcr = serial8250_in_MCR(up); in size_fifo()
805 serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO | in size_fifo()
807 serial8250_out_MCR(up, UART_MCR_LOOP); in size_fifo()
808 serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A); in size_fifo()
809 old_dl = serial_dl_read(up); in size_fifo()
810 serial_dl_write(up, 0x0001); in size_fifo()
811 serial_out(up, UART_LCR, UART_LCR_WLEN8); in size_fifo()
813 serial_out(up, UART_TX, count); in size_fifo()
815 for (count = 0; (serial_in(up, UART_LSR) & UART_LSR_DR) && in size_fifo()
817 serial_in(up, UART_RX); in size_fifo()
818 serial_out(up, UART_FCR, old_fcr); in size_fifo()
819 serial8250_out_MCR(up, old_mcr); in size_fifo()
820 serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A); in size_fifo()
821 serial_dl_write(up, old_dl); in size_fifo()
822 serial_out(up, UART_LCR, old_lcr); in size_fifo()
859 static void autoconfig_has_efr(struct uart_8250_port *up) in autoconfig_has_efr() argument
866 up->capabilities |= UART_CAP_EFR | UART_CAP_SLEEP; in autoconfig_has_efr()
885 up->acr = 0; in autoconfig_has_efr()
886 serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); in autoconfig_has_efr()
887 serial_out(up, UART_EFR, UART_EFR_ECB); in autoconfig_has_efr()
888 serial_out(up, UART_LCR, 0x00); in autoconfig_has_efr()
889 id1 = serial_icr_read(up, UART_ID1); in autoconfig_has_efr()
890 id2 = serial_icr_read(up, UART_ID2); in autoconfig_has_efr()
891 id3 = serial_icr_read(up, UART_ID3); in autoconfig_has_efr()
892 rev = serial_icr_read(up, UART_REV); in autoconfig_has_efr()
898 up->port.type = PORT_16C950; in autoconfig_has_efr()
906 up->bugs |= UART_BUG_QUOT; in autoconfig_has_efr()
918 id1 = autoconfig_read_divisor_id(up); in autoconfig_has_efr()
923 up->port.type = PORT_16850; in autoconfig_has_efr()
936 if (size_fifo(up) == 64) in autoconfig_has_efr()
937 up->port.type = PORT_16654; in autoconfig_has_efr()
939 up->port.type = PORT_16650V2; in autoconfig_has_efr()
947 static void autoconfig_8250(struct uart_8250_port *up) in autoconfig_8250() argument
951 up->port.type = PORT_8250; in autoconfig_8250()
953 scratch = serial_in(up, UART_SCR); in autoconfig_8250()
954 serial_out(up, UART_SCR, 0xa5); in autoconfig_8250()
955 status1 = serial_in(up, UART_SCR); in autoconfig_8250()
956 serial_out(up, UART_SCR, 0x5a); in autoconfig_8250()
957 status2 = serial_in(up, UART_SCR); in autoconfig_8250()
958 serial_out(up, UART_SCR, scratch); in autoconfig_8250()
961 up->port.type = PORT_16450; in autoconfig_8250()
964 static int broken_efr(struct uart_8250_port *up) in broken_efr() argument
971 if (autoconfig_read_divisor_id(up) == 0x0201 && size_fifo(up) == 16) in broken_efr()
983 static void autoconfig_16550a(struct uart_8250_port *up) in autoconfig_16550a() argument
989 lockdep_assert_held_once(&up->port.lock); in autoconfig_16550a()
991 up->port.type = PORT_16550A; in autoconfig_16550a()
992 up->capabilities |= UART_CAP_FIFO; in autoconfig_16550a()
995 !(up->port.flags & UPF_FULL_PROBE)) in autoconfig_16550a()
1002 serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A); in autoconfig_16550a()
1003 if (serial_in(up, UART_EFR) == 0) { in autoconfig_16550a()
1004 serial_out(up, UART_EFR, 0xA8); in autoconfig_16550a()
1005 if (serial_in(up, UART_EFR) != 0) { in autoconfig_16550a()
1007 up->port.type = PORT_16650; in autoconfig_16550a()
1008 up->capabilities |= UART_CAP_EFR | UART_CAP_SLEEP; in autoconfig_16550a()
1010 serial_out(up, UART_LCR, 0); in autoconfig_16550a()
1011 serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO | in autoconfig_16550a()
1013 status1 = serial_in(up, UART_IIR) & UART_IIR_FIFO_ENABLED_16750; in autoconfig_16550a()
1014 serial_out(up, UART_FCR, 0); in autoconfig_16550a()
1015 serial_out(up, UART_LCR, 0); in autoconfig_16550a()
1018 up->port.type = PORT_16550A_FSL64; in autoconfig_16550a()
1022 serial_out(up, UART_EFR, 0); in autoconfig_16550a()
1030 serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); in autoconfig_16550a()
1031 if (serial_in(up, UART_EFR) == 0 && !broken_efr(up)) { in autoconfig_16550a()
1033 autoconfig_has_efr(up); in autoconfig_16550a()
1044 serial_out(up, UART_LCR, 0); in autoconfig_16550a()
1045 status1 = serial8250_in_MCR(up); in autoconfig_16550a()
1046 serial_out(up, UART_LCR, 0xE0); in autoconfig_16550a()
1047 status2 = serial_in(up, 0x02); /* EXCR1 */ in autoconfig_16550a()
1050 serial_out(up, UART_LCR, 0); in autoconfig_16550a()
1051 serial8250_out_MCR(up, status1 ^ UART_MCR_LOOP); in autoconfig_16550a()
1052 serial_out(up, UART_LCR, 0xE0); in autoconfig_16550a()
1053 status2 = serial_in(up, 0x02); /* EXCR1 */ in autoconfig_16550a()
1054 serial_out(up, UART_LCR, 0); in autoconfig_16550a()
1055 serial8250_out_MCR(up, status1); in autoconfig_16550a()
1060 serial_out(up, UART_LCR, 0xE0); in autoconfig_16550a()
1062 quot = serial_dl_read(up); in autoconfig_16550a()
1065 if (ns16550a_goto_highspeed(up)) in autoconfig_16550a()
1066 serial_dl_write(up, quot); in autoconfig_16550a()
1068 serial_out(up, UART_LCR, 0); in autoconfig_16550a()
1070 up->port.uartclk = 921600*16; in autoconfig_16550a()
1071 up->port.type = PORT_NS16550A; in autoconfig_16550a()
1072 up->capabilities |= UART_NATSEMI; in autoconfig_16550a()
1083 serial_out(up, UART_LCR, 0); in autoconfig_16550a()
1084 serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO | UART_FCR7_64BYTE); in autoconfig_16550a()
1085 status1 = serial_in(up, UART_IIR) & UART_IIR_FIFO_ENABLED_16750; in autoconfig_16550a()
1086 serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO); in autoconfig_16550a()
1088 serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A); in autoconfig_16550a()
1089 serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO | UART_FCR7_64BYTE); in autoconfig_16550a()
1090 status2 = serial_in(up, UART_IIR) & UART_IIR_FIFO_ENABLED_16750; in autoconfig_16550a()
1091 serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO); in autoconfig_16550a()
1093 serial_out(up, UART_LCR, 0); in autoconfig_16550a()
1099 up->port.type = PORT_16750; in autoconfig_16550a()
1100 up->capabilities |= UART_CAP_AFE | UART_CAP_SLEEP; in autoconfig_16550a()
1112 iersave = serial_in(up, UART_IER); in autoconfig_16550a()
1113 serial_out(up, UART_IER, iersave & ~UART_IER_UUE); in autoconfig_16550a()
1114 if (!(serial_in(up, UART_IER) & UART_IER_UUE)) { in autoconfig_16550a()
1119 serial_out(up, UART_IER, iersave | UART_IER_UUE); in autoconfig_16550a()
1120 if (serial_in(up, UART_IER) & UART_IER_UUE) { in autoconfig_16550a()
1126 up->port.type = PORT_XSCALE; in autoconfig_16550a()
1127 up->capabilities |= UART_CAP_UUE | UART_CAP_RTOIE; in autoconfig_16550a()
1137 serial_out(up, UART_IER, iersave); in autoconfig_16550a()
1143 if (up->port.type == PORT_16550A && size_fifo(up) == 64) { in autoconfig_16550a()
1144 up->port.type = PORT_U6_16550A; in autoconfig_16550a()
1145 up->capabilities |= UART_CAP_AFE; in autoconfig_16550a()
1156 static void autoconfig(struct uart_8250_port *up) in autoconfig() argument
1160 struct uart_port *port = &up->port; in autoconfig()
1178 up->capabilities = 0; in autoconfig()
1179 up->bugs = 0; in autoconfig()
1195 scratch = serial_in(up, UART_IER); in autoconfig()
1196 serial_out(up, UART_IER, 0); in autoconfig()
1204 scratch2 = serial_in(up, UART_IER) & UART_IER_ALL_INTR; in autoconfig()
1205 serial_out(up, UART_IER, UART_IER_ALL_INTR); in autoconfig()
1209 scratch3 = serial_in(up, UART_IER) & UART_IER_ALL_INTR; in autoconfig()
1210 serial_out(up, UART_IER, scratch); in autoconfig()
1222 save_mcr = serial8250_in_MCR(up); in autoconfig()
1223 save_lcr = serial_in(up, UART_LCR); in autoconfig()
1235 serial8250_out_MCR(up, UART_MCR_LOOP | UART_MCR_OUT2 | UART_MCR_RTS); in autoconfig()
1236 status1 = serial_in(up, UART_MSR) & UART_MSR_STATUS_BITS; in autoconfig()
1237 serial8250_out_MCR(up, save_mcr); in autoconfig()
1255 serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); in autoconfig()
1256 serial_out(up, UART_EFR, 0); in autoconfig()
1257 serial_out(up, UART_LCR, 0); in autoconfig()
1259 serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO); in autoconfig()
1261 switch (serial_in(up, UART_IIR) & UART_IIR_FIFO_ENABLED) { in autoconfig()
1263 autoconfig_8250(up); in autoconfig()
1269 autoconfig_16550a(up); in autoconfig()
1280 if (port->type == PORT_16550A && up->probe & UART_PROBE_RSA && in autoconfig()
1281 __enable_rsa(up)) in autoconfig()
1285 serial_out(up, UART_LCR, save_lcr); in autoconfig()
1287 port->fifosize = uart_config[up->port.type].fifo_size; in autoconfig()
1288 old_capabilities = up->capabilities; in autoconfig()
1289 up->capabilities = uart_config[port->type].flags; in autoconfig()
1290 up->tx_loadsz = uart_config[port->type].tx_loadsz; in autoconfig()
1300 serial_out(up, UART_RSA_FRR, 0); in autoconfig()
1302 serial8250_out_MCR(up, save_mcr); in autoconfig()
1303 serial8250_clear_fifos(up); in autoconfig()
1304 serial_in(up, UART_RX); in autoconfig()
1305 serial8250_clear_IER(up); in autoconfig()
1314 fintek_8250_probe(up); in autoconfig()
1316 if (up->capabilities != old_capabilities) { in autoconfig()
1318 old_capabilities, up->capabilities); in autoconfig()
1325 static void autoconfig_irq(struct uart_8250_port *up) in autoconfig_irq() argument
1327 struct uart_port *port = &up->port; in autoconfig_irq()
1343 save_mcr = serial8250_in_MCR(up); in autoconfig_irq()
1346 save_ier = serial_in(up, UART_IER); in autoconfig_irq()
1348 serial8250_out_MCR(up, UART_MCR_OUT1 | UART_MCR_OUT2); in autoconfig_irq()
1351 serial8250_out_MCR(up, 0); in autoconfig_irq()
1354 serial8250_out_MCR(up, UART_MCR_DTR | UART_MCR_RTS); in autoconfig_irq()
1356 serial8250_out_MCR(up, in autoconfig_irq()
1361 serial_out(up, UART_IER, UART_IER_ALL_INTR); in autoconfig_irq()
1363 serial_in(up, UART_LSR); in autoconfig_irq()
1364 serial_in(up, UART_RX); in autoconfig_irq()
1365 serial_in(up, UART_IIR); in autoconfig_irq()
1366 serial_in(up, UART_MSR); in autoconfig_irq()
1367 serial_out(up, UART_TX, 0xFF); in autoconfig_irq()
1371 serial8250_out_MCR(up, save_mcr); in autoconfig_irq()
1374 serial_out(up, UART_IER, save_ier); in autoconfig_irq()
1385 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_stop_rx() local
1390 serial8250_rpm_get(up); in serial8250_stop_rx()
1392 up->ier &= ~(UART_IER_RLSI | UART_IER_RDI); in serial8250_stop_rx()
1393 serial_port_out(port, UART_IER, up->ier); in serial8250_stop_rx()
1395 serial8250_rpm_put(up); in serial8250_stop_rx()
1522 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_stop_tx() local
1524 serial8250_rpm_get(up); in serial8250_stop_tx()
1525 __stop_tx(up); in serial8250_stop_tx()
1531 up->acr |= UART_ACR_TXDIS; in serial8250_stop_tx()
1532 serial_icr_write(up, UART_ACR, up->acr); in serial8250_stop_tx()
1534 serial8250_rpm_put(up); in serial8250_stop_tx()
1539 struct uart_8250_port *up = up_to_u8250p(port); in __start_tx() local
1541 if (up->dma && !up->dma->tx_dma(up)) in __start_tx()
1544 if (serial8250_set_THRI(up)) { in __start_tx()
1545 if (up->bugs & UART_BUG_TXEN) { in __start_tx()
1546 u16 lsr = serial_lsr_in(up); in __start_tx()
1549 serial8250_tx_chars(up); in __start_tx()
1556 if (port->type == PORT_16C950 && up->acr & UART_ACR_TXDIS) { in __start_tx()
1557 up->acr &= ~UART_ACR_TXDIS; in __start_tx()
1558 serial_icr_write(up, UART_ACR, up->acr); in __start_tx()
1573 void serial8250_em485_start_tx(struct uart_8250_port *up, bool toggle_ier) in serial8250_em485_start_tx() argument
1575 unsigned char mcr = serial8250_in_MCR(up); in serial8250_em485_start_tx()
1577 if (!(up->port.rs485.flags & SER_RS485_RX_DURING_TX) && toggle_ier) in serial8250_em485_start_tx()
1578 serial8250_stop_rx(&up->port); in serial8250_em485_start_tx()
1580 if (up->port.rs485.flags & SER_RS485_RTS_ON_SEND) in serial8250_em485_start_tx()
1584 serial8250_out_MCR(up, mcr); in serial8250_em485_start_tx()
1591 struct uart_8250_port *up = up_to_u8250p(port); in start_tx_rs485() local
1592 struct uart_8250_em485 *em485 = up->em485; in start_tx_rs485()
1611 up->rs485_start_tx(up, true); in start_tx_rs485()
1613 if (up->port.rs485.delay_rts_before_send > 0) { in start_tx_rs485()
1616 up->port.rs485.delay_rts_before_send); in start_tx_rs485()
1643 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_start_tx() local
1644 struct uart_8250_em485 *em485 = up->em485; in serial8250_start_tx()
1652 serial8250_rpm_get_tx(up); in serial8250_start_tx()
1674 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_disable_ms() local
1680 if (up->bugs & UART_BUG_NOMSR) in serial8250_disable_ms()
1683 mctrl_gpio_disable_ms(up->gpios); in serial8250_disable_ms()
1685 up->ier &= ~UART_IER_MSI; in serial8250_disable_ms()
1686 serial_port_out(port, UART_IER, up->ier); in serial8250_disable_ms()
1691 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_enable_ms() local
1697 if (up->bugs & UART_BUG_NOMSR) in serial8250_enable_ms()
1700 mctrl_gpio_enable_ms(up->gpios); in serial8250_enable_ms()
1702 up->ier |= UART_IER_MSI; in serial8250_enable_ms()
1704 serial8250_rpm_get(up); in serial8250_enable_ms()
1705 serial_port_out(port, UART_IER, up->ier); in serial8250_enable_ms()
1706 serial8250_rpm_put(up); in serial8250_enable_ms()
1709 void serial8250_read_char(struct uart_8250_port *up, u16 lsr) in serial8250_read_char() argument
1711 struct uart_port *port = &up->port; in serial8250_read_char()
1715 ch = serial_in(up, UART_RX); in serial8250_read_char()
1728 lsr |= up->lsr_saved_flags; in serial8250_read_char()
1729 up->lsr_saved_flags = 0; in serial8250_read_char()
1777 u16 serial8250_rx_chars(struct uart_8250_port *up, u16 lsr) in serial8250_rx_chars() argument
1779 struct uart_port *port = &up->port; in serial8250_rx_chars()
1783 serial8250_read_char(up, lsr); in serial8250_rx_chars()
1786 lsr = serial_in(up, UART_LSR); in serial8250_rx_chars()
1794 void serial8250_tx_chars(struct uart_8250_port *up) in serial8250_tx_chars() argument
1796 struct uart_port *port = &up->port; in serial8250_tx_chars()
1809 __stop_tx(up); in serial8250_tx_chars()
1813 count = up->tx_loadsz; in serial8250_tx_chars()
1820 serial_out(up, UART_TX, c); in serial8250_tx_chars()
1821 if (up->bugs & UART_BUG_TXRACE) { in serial8250_tx_chars()
1831 serial_in(up, UART_SCR); in serial8250_tx_chars()
1834 if ((up->capabilities & UART_CAP_HFIFO) && in serial8250_tx_chars()
1835 !uart_lsr_tx_empty(serial_in(up, UART_LSR))) in serial8250_tx_chars()
1838 if ((up->capabilities & UART_CAP_MINI) && in serial8250_tx_chars()
1839 !(serial_in(up, UART_LSR) & UART_LSR_THRE)) in serial8250_tx_chars()
1852 !(up->capabilities & UART_CAP_RPM)) in serial8250_tx_chars()
1853 __stop_tx(up); in serial8250_tx_chars()
1858 unsigned int serial8250_modem_status(struct uart_8250_port *up) in serial8250_modem_status() argument
1860 struct uart_port *port = &up->port; in serial8250_modem_status()
1861 unsigned int status = serial_in(up, UART_MSR); in serial8250_modem_status()
1863 status |= up->msr_saved_flags; in serial8250_modem_status()
1864 up->msr_saved_flags = 0; in serial8250_modem_status()
1865 if (status & UART_MSR_ANY_DELTA && up->ier & UART_IER_MSI && in serial8250_modem_status()
1883 static bool handle_rx_dma(struct uart_8250_port *up, unsigned int iir) in handle_rx_dma() argument
1898 if (!up->dma->rx_running) in handle_rx_dma()
1903 serial8250_rx_dma_flush(up); in handle_rx_dma()
1906 return up->dma->rx_dma(up); in handle_rx_dma()
1914 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_handle_irq() local
1925 status = serial_lsr_in(up); in serial8250_handle_irq()
1937 !(up->ier & (UART_IER_RLSI | UART_IER_RDI))) in serial8250_handle_irq()
1946 if (!up->dma || handle_rx_dma(up, iir)) in serial8250_handle_irq()
1947 status = serial8250_rx_chars(up, status); in serial8250_handle_irq()
1949 serial8250_modem_status(up); in serial8250_handle_irq()
1950 if ((status & UART_LSR_THRE) && (up->ier & UART_IER_THRI)) { in serial8250_handle_irq()
1951 if (!up->dma || up->dma->tx_err) in serial8250_handle_irq()
1952 serial8250_tx_chars(up); in serial8250_handle_irq()
1953 else if (!up->dma->tx_running) in serial8250_handle_irq()
1954 __stop_tx(up); in serial8250_handle_irq()
1965 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_default_handle_irq() local
1969 serial8250_rpm_get(up); in serial8250_default_handle_irq()
1974 serial8250_rpm_put(up); in serial8250_default_handle_irq()
1991 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_tx_threshold_handle_irq() local
1994 serial8250_tx_chars(up); in serial8250_tx_threshold_handle_irq()
2004 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_tx_empty() local
2008 serial8250_rpm_get(up); in serial8250_tx_empty()
2011 if (!serial8250_tx_dma_running(up) && uart_lsr_tx_empty(serial_lsr_in(up))) in serial8250_tx_empty()
2015 serial8250_rpm_put(up); in serial8250_tx_empty()
2022 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_do_get_mctrl() local
2026 serial8250_rpm_get(up); in serial8250_do_get_mctrl()
2027 status = serial8250_modem_status(up); in serial8250_do_get_mctrl()
2028 serial8250_rpm_put(up); in serial8250_do_get_mctrl()
2031 if (up->gpios) in serial8250_do_get_mctrl()
2032 return mctrl_gpio_get(up->gpios, &val); in serial8250_do_get_mctrl()
2047 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_do_set_mctrl() local
2052 mcr |= up->mcr; in serial8250_do_set_mctrl()
2054 serial8250_out_MCR(up, mcr); in serial8250_do_set_mctrl()
2071 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_break_ctl() local
2074 serial8250_rpm_get(up); in serial8250_break_ctl()
2077 up->lcr |= UART_LCR_SBC; in serial8250_break_ctl()
2079 up->lcr &= ~UART_LCR_SBC; in serial8250_break_ctl()
2080 serial_port_out(port, UART_LCR, up->lcr); in serial8250_break_ctl()
2082 serial8250_rpm_put(up); in serial8250_break_ctl()
2086 static bool wait_for_lsr(struct uart_8250_port *up, int bits) in wait_for_lsr() argument
2094 if (up->port.frame_time) in wait_for_lsr()
2095 tmout = up->port.frame_time * 2 / NSEC_PER_USEC; in wait_for_lsr()
2100 status = serial_lsr_in(up); in wait_for_lsr()
2114 static void wait_for_xmitr(struct uart_8250_port *up, int bits) in wait_for_xmitr() argument
2118 wait_for_lsr(up, bits); in wait_for_xmitr()
2121 if (up->port.flags & UPF_CONS_FLOW) { in wait_for_xmitr()
2123 unsigned int msr = serial_in(up, UART_MSR); in wait_for_xmitr()
2124 up->msr_saved_flags |= msr & MSR_SAVE_FLAGS; in wait_for_xmitr()
2141 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_get_poll_char() local
2145 serial8250_rpm_get(up); in serial8250_get_poll_char()
2156 serial8250_rpm_put(up); in serial8250_get_poll_char()
2165 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_put_poll_char() local
2175 serial8250_rpm_get(up); in serial8250_put_poll_char()
2180 serial8250_clear_IER(up); in serial8250_put_poll_char()
2182 wait_for_xmitr(up, UART_LSR_BOTH_EMPTY); in serial8250_put_poll_char()
2192 wait_for_xmitr(up, UART_LSR_BOTH_EMPTY); in serial8250_put_poll_char()
2194 serial8250_rpm_put(up); in serial8250_put_poll_char()
2201 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_do_startup() local
2209 if (!up->tx_loadsz) in serial8250_do_startup()
2210 up->tx_loadsz = uart_config[port->type].tx_loadsz; in serial8250_do_startup()
2211 if (!up->capabilities) in serial8250_do_startup()
2212 up->capabilities = uart_config[port->type].flags; in serial8250_do_startup()
2213 up->mcr = 0; in serial8250_do_startup()
2215 if (port->iotype != up->cur_iotype) in serial8250_do_startup()
2218 serial8250_rpm_get(up); in serial8250_do_startup()
2226 up->acr = 0; in serial8250_do_startup()
2231 serial_icr_write(up, UART_CSR, 0); /* Reset the UART */ in serial8250_do_startup()
2262 enable_rsa(up); in serial8250_do_startup()
2269 serial8250_clear_fifos(up); in serial8250_do_startup()
2297 serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); in serial8250_do_startup()
2299 fctr = serial_in(up, UART_FCTR) & ~(UART_FCTR_RX|UART_FCTR_TX); in serial8250_do_startup()
2317 if ((up->tx_loadsz < 2) || (up->tx_loadsz > port->fifosize)) { in serial8250_do_startup()
2323 port->fifosize - up->tx_loadsz); in serial8250_do_startup()
2329 if (port->irq && (up->port.flags & UPF_SHARE_IRQ)) in serial8250_do_startup()
2330 up->port.irqflags |= IRQF_SHARED; in serial8250_do_startup()
2332 retval = up->ops->setup_irq(up); in serial8250_do_startup()
2336 if (port->irq && !(up->port.flags & UPF_NO_THRE_TEST)) { in serial8250_do_startup()
2354 wait_for_xmitr(up, UART_LSR_THRE); in serial8250_do_startup()
2375 up->port.flags & UPF_BUG_THRE) { in serial8250_do_startup()
2376 up->bugs |= UART_BUG_THRE; in serial8250_do_startup()
2380 up->ops->setup_timer(up); in serial8250_do_startup()
2388 if (up->port.flags & UPF_FOURPORT) { in serial8250_do_startup()
2389 if (!up->port.irq) in serial8250_do_startup()
2390 up->port.mctrl |= TIOCM_OUT1; in serial8250_do_startup()
2396 up->port.mctrl |= TIOCM_OUT2; in serial8250_do_startup()
2411 if (up->port.quirks & UPQ_NO_TXEN_TEST) in serial8250_do_startup()
2424 if (!(up->bugs & UART_BUG_TXEN)) { in serial8250_do_startup()
2425 up->bugs |= UART_BUG_TXEN; in serial8250_do_startup()
2429 up->bugs &= ~UART_BUG_TXEN; in serial8250_do_startup()
2444 up->lsr_saved_flags = 0; in serial8250_do_startup()
2445 up->msr_saved_flags = 0; in serial8250_do_startup()
2450 if (up->dma) { in serial8250_do_startup()
2455 else if (serial8250_request_dma(up)) in serial8250_do_startup()
2459 up->dma = NULL; in serial8250_do_startup()
2468 up->ier = UART_IER_RLSI | UART_IER_RDI; in serial8250_do_startup()
2481 serial8250_rpm_put(up); in serial8250_do_startup()
2495 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_do_shutdown() local
2498 serial8250_rpm_get(up); in serial8250_do_shutdown()
2505 up->ier = 0; in serial8250_do_shutdown()
2511 if (up->dma) in serial8250_do_shutdown()
2512 serial8250_release_dma(up); in serial8250_do_shutdown()
2530 serial8250_clear_fifos(up); in serial8250_do_shutdown()
2536 disable_rsa(up); in serial8250_do_shutdown()
2544 serial8250_rpm_put(up); in serial8250_do_shutdown()
2546 up->ops->release_irq(up); in serial8250_do_shutdown()
2560 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_flush_buffer() local
2562 if (up->dma) in serial8250_flush_buffer()
2563 serial8250_tx_dma_flush(up); in serial8250_flush_buffer()
2571 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_do_get_divisor() local
2616 if (up->bugs & UART_BUG_QUOT && (quot & 0xff) == 0) in serial8250_do_get_divisor()
2632 static unsigned char serial8250_compute_lcr(struct uart_8250_port *up, in serial8250_compute_lcr() argument
2654 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_do_set_divisor() local
2657 if (is_omap1510_8250(up)) { in serial8250_do_set_divisor()
2669 if (up->capabilities & UART_NATSEMI) in serial8250_do_set_divisor()
2672 serial_port_out(port, UART_LCR, up->lcr | UART_LCR_DLAB); in serial8250_do_set_divisor()
2674 serial_dl_write(up, quot); in serial8250_do_set_divisor()
2759 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_do_set_termios() local
2764 if (up->capabilities & UART_CAP_MINI) { in serial8250_do_set_termios()
2770 cval = serial8250_compute_lcr(up, termios->c_cflag); in serial8250_do_set_termios()
2781 serial8250_rpm_get(up); in serial8250_do_set_termios()
2784 up->lcr = cval; /* Save computed LCR */ in serial8250_do_set_termios()
2786 if (up->capabilities & UART_CAP_FIFO && port->fifosize > 1) { in serial8250_do_set_termios()
2787 if (baud < 2400 && !up->dma) { in serial8250_do_set_termios()
2788 up->fcr &= ~UART_FCR_TRIGGER_MASK; in serial8250_do_set_termios()
2789 up->fcr |= UART_FCR_TRIGGER_1; in serial8250_do_set_termios()
2798 if (up->capabilities & UART_CAP_AFE) { in serial8250_do_set_termios()
2799 up->mcr &= ~UART_MCR_AFE; in serial8250_do_set_termios()
2801 up->mcr |= UART_MCR_AFE; in serial8250_do_set_termios()
2846 up->ier &= ~UART_IER_MSI; in serial8250_do_set_termios()
2847 if (!(up->bugs & UART_BUG_NOMSR) && in serial8250_do_set_termios()
2848 UART_ENABLE_MS(&up->port, termios->c_cflag)) in serial8250_do_set_termios()
2849 up->ier |= UART_IER_MSI; in serial8250_do_set_termios()
2850 if (up->capabilities & UART_CAP_UUE) in serial8250_do_set_termios()
2851 up->ier |= UART_IER_UUE; in serial8250_do_set_termios()
2852 if (up->capabilities & UART_CAP_RTOIE) in serial8250_do_set_termios()
2853 up->ier |= UART_IER_RTOIE; in serial8250_do_set_termios()
2855 serial_port_out(port, UART_IER, up->ier); in serial8250_do_set_termios()
2857 if (up->capabilities & UART_CAP_EFR) { in serial8250_do_set_termios()
2881 serial_port_out(port, UART_FCR, up->fcr); in serial8250_do_set_termios()
2883 serial_port_out(port, UART_LCR, up->lcr); /* reset DLAB */ in serial8250_do_set_termios()
2886 if (up->fcr & UART_FCR_ENABLE_FIFO) in serial8250_do_set_termios()
2888 serial_port_out(port, UART_FCR, up->fcr); /* set fcr */ in serial8250_do_set_termios()
2892 serial8250_rpm_put(up); in serial8250_do_set_termios()
2969 static int serial8250_request_std_resource(struct uart_8250_port *up) in serial8250_request_std_resource() argument
2971 unsigned int size = serial8250_port_size(up); in serial8250_request_std_resource()
2972 struct uart_port *port = &up->port; in serial8250_request_std_resource()
3010 static void serial8250_release_std_resource(struct uart_8250_port *up) in serial8250_release_std_resource() argument
3012 unsigned int size = serial8250_port_size(up); in serial8250_release_std_resource()
3013 struct uart_port *port = &up->port; in serial8250_release_std_resource()
3042 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_release_port() local
3044 serial8250_release_std_resource(up); in serial8250_release_port()
3049 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_request_port() local
3051 return serial8250_request_std_resource(up); in serial8250_request_port()
3054 static int fcr_get_rxtrig_bytes(struct uart_8250_port *up) in fcr_get_rxtrig_bytes() argument
3056 const struct serial8250_config *conf_type = &uart_config[up->port.type]; in fcr_get_rxtrig_bytes()
3059 bytes = conf_type->rxtrig_bytes[UART_FCR_R_TRIG_BITS(up->fcr)]; in fcr_get_rxtrig_bytes()
3064 static int bytes_to_fcr_rxtrig(struct uart_8250_port *up, unsigned char bytes) in bytes_to_fcr_rxtrig() argument
3066 const struct serial8250_config *conf_type = &uart_config[up->port.type]; in bytes_to_fcr_rxtrig()
3085 struct uart_8250_port *up = up_to_u8250p(uport); in do_get_rxtrig() local
3087 if (!(up->capabilities & UART_CAP_FIFO) || uport->fifosize <= 1) in do_get_rxtrig()
3090 return fcr_get_rxtrig_bytes(up); in do_get_rxtrig()
3121 struct uart_8250_port *up = up_to_u8250p(uport); in do_set_rxtrig() local
3124 if (!(up->capabilities & UART_CAP_FIFO) || uport->fifosize <= 1) in do_set_rxtrig()
3127 rxtrig = bytes_to_fcr_rxtrig(up, bytes); in do_set_rxtrig()
3131 serial8250_clear_fifos(up); in do_set_rxtrig()
3132 up->fcr &= ~UART_FCR_TRIGGER_MASK; in do_set_rxtrig()
3133 up->fcr |= (unsigned char)rxtrig; in do_set_rxtrig()
3134 serial_out(up, UART_FCR, up->fcr); in do_set_rxtrig()
3181 static void register_dev_spec_attr_grp(struct uart_8250_port *up) in register_dev_spec_attr_grp() argument
3183 const struct serial8250_config *conf_type = &uart_config[up->port.type]; in register_dev_spec_attr_grp()
3186 up->port.attr_group = &serial8250_dev_attr_group; in register_dev_spec_attr_grp()
3191 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_config_port() local
3198 ret = serial8250_request_std_resource(up); in serial8250_config_port()
3202 if (port->iotype != up->cur_iotype) in serial8250_config_port()
3206 autoconfig(up); in serial8250_config_port()
3210 up->bugs |= UART_BUG_NOMSR; in serial8250_config_port()
3213 autoconfig_irq(up); in serial8250_config_port()
3216 serial8250_release_std_resource(up); in serial8250_config_port()
3218 register_dev_spec_attr_grp(up); in serial8250_config_port()
3219 up->fcr = uart_config[up->port.type].fcr; in serial8250_config_port()
3270 void serial8250_init_port(struct uart_8250_port *up) in serial8250_init_port() argument
3272 struct uart_port *port = &up->port; in serial8250_init_port()
3280 up->cur_iotype = UPIO_UNKNOWN; in serial8250_init_port()
3284 void serial8250_set_defaults(struct uart_8250_port *up) in serial8250_set_defaults() argument
3286 struct uart_port *port = &up->port; in serial8250_set_defaults()
3288 if (up->port.flags & UPF_FIXED_TYPE) { in serial8250_set_defaults()
3289 unsigned int type = up->port.type; in serial8250_set_defaults()
3291 if (!up->port.fifosize) in serial8250_set_defaults()
3292 up->port.fifosize = uart_config[type].fifo_size; in serial8250_set_defaults()
3293 if (!up->tx_loadsz) in serial8250_set_defaults()
3294 up->tx_loadsz = uart_config[type].tx_loadsz; in serial8250_set_defaults()
3295 if (!up->capabilities) in serial8250_set_defaults()
3296 up->capabilities = uart_config[type].flags; in serial8250_set_defaults()
3302 if (up->dma) { in serial8250_set_defaults()
3303 if (!up->dma->tx_dma) in serial8250_set_defaults()
3304 up->dma->tx_dma = serial8250_tx_dma; in serial8250_set_defaults()
3305 if (!up->dma->rx_dma) in serial8250_set_defaults()
3306 up->dma->rx_dma = serial8250_rx_dma; in serial8250_set_defaults()
3320 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_console_wait_putchar() local
3322 wait_for_xmitr(up, UART_LSR_THRE); in serial8250_console_wait_putchar()
3329 static void serial8250_console_restore(struct uart_8250_port *up) in serial8250_console_restore() argument
3331 struct uart_port *port = &up->port; in serial8250_console_restore()
3348 serial_port_out(port, UART_LCR, up->lcr); in serial8250_console_restore()
3349 serial8250_out_MCR(up, up->mcr | UART_MCR_DTR | UART_MCR_RTS); in serial8250_console_restore()
3352 static void fifo_wait_for_lsr(struct uart_8250_port *up, unsigned int count) in fifo_wait_for_lsr() argument
3357 if (wait_for_lsr(up, UART_LSR_THRE)) in fifo_wait_for_lsr()
3368 static void serial8250_console_fifo_write(struct uart_8250_port *up, in serial8250_console_fifo_write() argument
3372 unsigned int fifosize = up->tx_loadsz; in serial8250_console_fifo_write()
3373 struct uart_port *port = &up->port; in serial8250_console_fifo_write()
3380 fifo_wait_for_lsr(up, fifosize); in serial8250_console_fifo_write()
3398 fifo_wait_for_lsr(up, tx_count); in serial8250_console_fifo_write()
3410 void serial8250_console_write(struct uart_8250_port *up, const char *s, in serial8250_console_write() argument
3413 struct uart_8250_em485 *em485 = up->em485; in serial8250_console_write()
3414 struct uart_port *port = &up->port; in serial8250_console_write()
3430 serial8250_clear_IER(up); in serial8250_console_write()
3433 if (up->canary && (up->canary != serial_port_in(port, UART_SCR))) { in serial8250_console_write()
3434 serial8250_console_restore(up); in serial8250_console_write()
3435 up->canary = 0; in serial8250_console_write()
3440 up->rs485_start_tx(up, false); in serial8250_console_write()
3444 use_fifo = (up->capabilities & UART_CAP_FIFO) && in serial8250_console_write()
3449 !(up->capabilities & UART_CAP_MINI) && in serial8250_console_write()
3453 up->tx_loadsz > 1 && in serial8250_console_write()
3454 (up->fcr & UART_FCR_ENABLE_FIFO) && in serial8250_console_write()
3462 !(up->port.flags & UPF_CONS_FLOW); in serial8250_console_write()
3465 serial8250_console_fifo_write(up, s, count); in serial8250_console_write()
3473 wait_for_xmitr(up, UART_LSR_BOTH_EMPTY); in serial8250_console_write()
3478 up->rs485_stop_tx(up, false); in serial8250_console_write()
3490 if (up->msr_saved_flags) in serial8250_console_write()
3491 serial8250_modem_status(up); in serial8250_console_write()