Lines Matching full:up
319 static int default_serial_dl_read(struct uart_8250_port *up) in default_serial_dl_read() argument
322 unsigned char dll = serial_in(up, UART_DLL); in default_serial_dl_read()
323 unsigned char dlm = serial_in(up, UART_DLM); in default_serial_dl_read()
329 static void default_serial_dl_write(struct uart_8250_port *up, int value) in default_serial_dl_write() argument
331 serial_out(up, UART_DLL, value & 0xff); in default_serial_dl_write()
332 serial_out(up, UART_DLM, value >> 8 & 0xff); in default_serial_dl_write()
383 static int au_serial_dl_read(struct uart_8250_port *up) in au_serial_dl_read() argument
385 return __raw_readl(up->port.membase + 0x28); in au_serial_dl_read()
388 static void au_serial_dl_write(struct uart_8250_port *up, int value) in au_serial_dl_write() argument
390 __raw_writel(value, up->port.membase + 0x28); in au_serial_dl_write()
473 struct uart_8250_port *up = up_to_u8250p(p); in set_io_from_upio() local
475 up->dl_read = default_serial_dl_read; in set_io_from_upio()
476 up->dl_write = default_serial_dl_write; in set_io_from_upio()
508 up->dl_read = au_serial_dl_read; in set_io_from_upio()
509 up->dl_write = au_serial_dl_write; in set_io_from_upio()
519 up->cur_iotype = p->iotype; in set_io_from_upio()
672 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_em485_config() local
686 return serial8250_em485_init(up); in serial8250_em485_config()
688 serial8250_em485_destroy(up); in serial8250_em485_config()
757 static void serial8250_clear_IER(struct uart_8250_port *up) in serial8250_clear_IER() argument
759 if (up->capabilities & UART_CAP_UUE) in serial8250_clear_IER()
760 serial_out(up, UART_IER, UART_IER_UUE); in serial8250_clear_IER()
762 serial_out(up, UART_IER, 0); in serial8250_clear_IER()
770 static int __enable_rsa(struct uart_8250_port *up) in __enable_rsa() argument
775 mode = serial_in(up, UART_RSA_MSR); in __enable_rsa()
779 serial_out(up, UART_RSA_MSR, mode | UART_RSA_MSR_FIFO); in __enable_rsa()
780 mode = serial_in(up, UART_RSA_MSR); in __enable_rsa()
785 up->port.uartclk = SERIAL_RSA_BAUD_BASE * 16; in __enable_rsa()
790 static void enable_rsa(struct uart_8250_port *up) in enable_rsa() argument
792 if (up->port.type == PORT_RSA) { in enable_rsa()
793 if (up->port.uartclk != SERIAL_RSA_BAUD_BASE * 16) { in enable_rsa()
794 spin_lock_irq(&up->port.lock); in enable_rsa()
795 __enable_rsa(up); in enable_rsa()
796 spin_unlock_irq(&up->port.lock); in enable_rsa()
798 if (up->port.uartclk == SERIAL_RSA_BAUD_BASE * 16) in enable_rsa()
799 serial_out(up, UART_RSA_FRR, 0); in enable_rsa()
809 static void disable_rsa(struct uart_8250_port *up) in disable_rsa() argument
814 if (up->port.type == PORT_RSA && in disable_rsa()
815 up->port.uartclk == SERIAL_RSA_BAUD_BASE * 16) { in disable_rsa()
816 spin_lock_irq(&up->port.lock); in disable_rsa()
818 mode = serial_in(up, UART_RSA_MSR); in disable_rsa()
822 serial_out(up, UART_RSA_MSR, mode & ~UART_RSA_MSR_FIFO); in disable_rsa()
823 mode = serial_in(up, UART_RSA_MSR); in disable_rsa()
828 up->port.uartclk = SERIAL_RSA_BAUD_BASE_LO * 16; in disable_rsa()
829 spin_unlock_irq(&up->port.lock); in disable_rsa()
838 static int size_fifo(struct uart_8250_port *up) in size_fifo() argument
844 old_lcr = serial_in(up, UART_LCR); in size_fifo()
845 serial_out(up, UART_LCR, 0); in size_fifo()
846 old_fcr = serial_in(up, UART_FCR); in size_fifo()
847 old_mcr = serial8250_in_MCR(up); in size_fifo()
848 serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO | in size_fifo()
850 serial8250_out_MCR(up, UART_MCR_LOOP); in size_fifo()
851 serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A); in size_fifo()
852 old_dl = serial_dl_read(up); in size_fifo()
853 serial_dl_write(up, 0x0001); in size_fifo()
854 serial_out(up, UART_LCR, UART_LCR_WLEN8); in size_fifo()
856 serial_out(up, UART_TX, count); in size_fifo()
858 for (count = 0; (serial_in(up, UART_LSR) & UART_LSR_DR) && in size_fifo()
860 serial_in(up, UART_RX); in size_fifo()
861 serial_out(up, UART_FCR, old_fcr); in size_fifo()
862 serial8250_out_MCR(up, old_mcr); in size_fifo()
863 serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A); in size_fifo()
864 serial_dl_write(up, old_dl); in size_fifo()
865 serial_out(up, UART_LCR, old_lcr); in size_fifo()
902 static void autoconfig_has_efr(struct uart_8250_port *up) in autoconfig_has_efr() argument
909 up->capabilities |= UART_CAP_EFR | UART_CAP_SLEEP; in autoconfig_has_efr()
915 * Semiconductor clone chips lock up if you try writing to the in autoconfig_has_efr()
928 up->acr = 0; in autoconfig_has_efr()
929 serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); in autoconfig_has_efr()
930 serial_out(up, UART_EFR, UART_EFR_ECB); in autoconfig_has_efr()
931 serial_out(up, UART_LCR, 0x00); in autoconfig_has_efr()
932 id1 = serial_icr_read(up, UART_ID1); in autoconfig_has_efr()
933 id2 = serial_icr_read(up, UART_ID2); in autoconfig_has_efr()
934 id3 = serial_icr_read(up, UART_ID3); in autoconfig_has_efr()
935 rev = serial_icr_read(up, UART_REV); in autoconfig_has_efr()
941 up->port.type = PORT_16C950; in autoconfig_has_efr()
949 up->bugs |= UART_BUG_QUOT; in autoconfig_has_efr()
961 id1 = autoconfig_read_divisor_id(up); in autoconfig_has_efr()
966 up->port.type = PORT_16850; in autoconfig_has_efr()
979 if (size_fifo(up) == 64) in autoconfig_has_efr()
980 up->port.type = PORT_16654; in autoconfig_has_efr()
982 up->port.type = PORT_16650V2; in autoconfig_has_efr()
990 static void autoconfig_8250(struct uart_8250_port *up) in autoconfig_8250() argument
994 up->port.type = PORT_8250; in autoconfig_8250()
996 scratch = serial_in(up, UART_SCR); in autoconfig_8250()
997 serial_out(up, UART_SCR, 0xa5); in autoconfig_8250()
998 status1 = serial_in(up, UART_SCR); in autoconfig_8250()
999 serial_out(up, UART_SCR, 0x5a); in autoconfig_8250()
1000 status2 = serial_in(up, UART_SCR); in autoconfig_8250()
1001 serial_out(up, UART_SCR, scratch); in autoconfig_8250()
1004 up->port.type = PORT_16450; in autoconfig_8250()
1007 static int broken_efr(struct uart_8250_port *up) in broken_efr() argument
1014 if (autoconfig_read_divisor_id(up) == 0x0201 && size_fifo(up) == 16) in broken_efr()
1026 static void autoconfig_16550a(struct uart_8250_port *up) in autoconfig_16550a() argument
1031 up->port.type = PORT_16550A; in autoconfig_16550a()
1032 up->capabilities |= UART_CAP_FIFO; in autoconfig_16550a()
1035 !(up->port.flags & UPF_FULL_PROBE)) in autoconfig_16550a()
1042 serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A); in autoconfig_16550a()
1043 if (serial_in(up, UART_EFR) == 0) { in autoconfig_16550a()
1044 serial_out(up, UART_EFR, 0xA8); in autoconfig_16550a()
1045 if (serial_in(up, UART_EFR) != 0) { in autoconfig_16550a()
1047 up->port.type = PORT_16650; in autoconfig_16550a()
1048 up->capabilities |= UART_CAP_EFR | UART_CAP_SLEEP; in autoconfig_16550a()
1050 serial_out(up, UART_LCR, 0); in autoconfig_16550a()
1051 serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO | in autoconfig_16550a()
1053 status1 = serial_in(up, UART_IIR) >> 5; in autoconfig_16550a()
1054 serial_out(up, UART_FCR, 0); in autoconfig_16550a()
1055 serial_out(up, UART_LCR, 0); in autoconfig_16550a()
1058 up->port.type = PORT_16550A_FSL64; in autoconfig_16550a()
1062 serial_out(up, UART_EFR, 0); in autoconfig_16550a()
1070 serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); in autoconfig_16550a()
1071 if (serial_in(up, UART_EFR) == 0 && !broken_efr(up)) { in autoconfig_16550a()
1073 autoconfig_has_efr(up); in autoconfig_16550a()
1084 serial_out(up, UART_LCR, 0); in autoconfig_16550a()
1085 status1 = serial8250_in_MCR(up); in autoconfig_16550a()
1086 serial_out(up, UART_LCR, 0xE0); in autoconfig_16550a()
1087 status2 = serial_in(up, 0x02); /* EXCR1 */ in autoconfig_16550a()
1090 serial_out(up, UART_LCR, 0); in autoconfig_16550a()
1091 serial8250_out_MCR(up, status1 ^ UART_MCR_LOOP); in autoconfig_16550a()
1092 serial_out(up, UART_LCR, 0xE0); in autoconfig_16550a()
1093 status2 = serial_in(up, 0x02); /* EXCR1 */ in autoconfig_16550a()
1094 serial_out(up, UART_LCR, 0); in autoconfig_16550a()
1095 serial8250_out_MCR(up, status1); in autoconfig_16550a()
1100 serial_out(up, UART_LCR, 0xE0); in autoconfig_16550a()
1102 quot = serial_dl_read(up); in autoconfig_16550a()
1105 if (ns16550a_goto_highspeed(up)) in autoconfig_16550a()
1106 serial_dl_write(up, quot); in autoconfig_16550a()
1108 serial_out(up, UART_LCR, 0); in autoconfig_16550a()
1110 up->port.uartclk = 921600*16; in autoconfig_16550a()
1111 up->port.type = PORT_NS16550A; in autoconfig_16550a()
1112 up->capabilities |= UART_NATSEMI; in autoconfig_16550a()
1123 serial_out(up, UART_LCR, 0); in autoconfig_16550a()
1124 serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO | UART_FCR7_64BYTE); in autoconfig_16550a()
1125 status1 = serial_in(up, UART_IIR) >> 5; in autoconfig_16550a()
1126 serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO); in autoconfig_16550a()
1127 serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A); in autoconfig_16550a()
1128 serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO | UART_FCR7_64BYTE); in autoconfig_16550a()
1129 status2 = serial_in(up, UART_IIR) >> 5; in autoconfig_16550a()
1130 serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO); in autoconfig_16550a()
1131 serial_out(up, UART_LCR, 0); in autoconfig_16550a()
1136 up->port.type = PORT_16750; in autoconfig_16550a()
1137 up->capabilities |= UART_CAP_AFE | UART_CAP_SLEEP; in autoconfig_16550a()
1149 iersave = serial_in(up, UART_IER); in autoconfig_16550a()
1150 serial_out(up, UART_IER, iersave & ~UART_IER_UUE); in autoconfig_16550a()
1151 if (!(serial_in(up, UART_IER) & UART_IER_UUE)) { in autoconfig_16550a()
1156 serial_out(up, UART_IER, iersave | UART_IER_UUE); in autoconfig_16550a()
1157 if (serial_in(up, UART_IER) & UART_IER_UUE) { in autoconfig_16550a()
1163 up->port.type = PORT_XSCALE; in autoconfig_16550a()
1164 up->capabilities |= UART_CAP_UUE | UART_CAP_RTOIE; in autoconfig_16550a()
1174 serial_out(up, UART_IER, iersave); in autoconfig_16550a()
1180 if (up->port.type == PORT_16550A && size_fifo(up) == 64) { in autoconfig_16550a()
1181 up->port.type = PORT_U6_16550A; in autoconfig_16550a()
1182 up->capabilities |= UART_CAP_AFE; in autoconfig_16550a()
1193 static void autoconfig(struct uart_8250_port *up) in autoconfig() argument
1197 struct uart_port *port = &up->port; in autoconfig()
1213 up->capabilities = 0; in autoconfig()
1214 up->bugs = 0; in autoconfig()
1230 scratch = serial_in(up, UART_IER); in autoconfig()
1231 serial_out(up, UART_IER, 0); in autoconfig()
1239 scratch2 = serial_in(up, UART_IER) & 0x0f; in autoconfig()
1240 serial_out(up, UART_IER, 0x0F); in autoconfig()
1244 scratch3 = serial_in(up, UART_IER) & 0x0f; in autoconfig()
1245 serial_out(up, UART_IER, scratch); in autoconfig()
1257 save_mcr = serial8250_in_MCR(up); in autoconfig()
1258 save_lcr = serial_in(up, UART_LCR); in autoconfig()
1270 serial8250_out_MCR(up, UART_MCR_LOOP | 0x0A); in autoconfig()
1271 status1 = serial_in(up, UART_MSR) & 0xF0; in autoconfig()
1272 serial8250_out_MCR(up, save_mcr); in autoconfig()
1290 serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); in autoconfig()
1291 serial_out(up, UART_EFR, 0); in autoconfig()
1292 serial_out(up, UART_LCR, 0); in autoconfig()
1294 serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO); in autoconfig()
1297 scratch = serial_in(up, UART_IIR); in autoconfig()
1301 autoconfig_8250(up); in autoconfig()
1310 autoconfig_16550a(up); in autoconfig()
1318 if (port->type == PORT_16550A && up->probe & UART_PROBE_RSA && in autoconfig()
1319 __enable_rsa(up)) in autoconfig()
1323 serial_out(up, UART_LCR, save_lcr); in autoconfig()
1325 port->fifosize = uart_config[up->port.type].fifo_size; in autoconfig()
1326 old_capabilities = up->capabilities; in autoconfig()
1327 up->capabilities = uart_config[port->type].flags; in autoconfig()
1328 up->tx_loadsz = uart_config[port->type].tx_loadsz; in autoconfig()
1338 serial_out(up, UART_RSA_FRR, 0); in autoconfig()
1340 serial8250_out_MCR(up, save_mcr); in autoconfig()
1341 serial8250_clear_fifos(up); in autoconfig()
1342 serial_in(up, UART_RX); in autoconfig()
1343 serial8250_clear_IER(up); in autoconfig()
1352 fintek_8250_probe(up); in autoconfig()
1354 if (up->capabilities != old_capabilities) { in autoconfig()
1356 old_capabilities, up->capabilities); in autoconfig()
1363 static void autoconfig_irq(struct uart_8250_port *up) in autoconfig_irq() argument
1365 struct uart_port *port = &up->port; in autoconfig_irq()
1384 save_mcr = serial8250_in_MCR(up); in autoconfig_irq()
1385 save_ier = serial_in(up, UART_IER); in autoconfig_irq()
1386 serial8250_out_MCR(up, UART_MCR_OUT1 | UART_MCR_OUT2); in autoconfig_irq()
1389 serial8250_out_MCR(up, 0); in autoconfig_irq()
1392 serial8250_out_MCR(up, UART_MCR_DTR | UART_MCR_RTS); in autoconfig_irq()
1394 serial8250_out_MCR(up, in autoconfig_irq()
1397 serial_out(up, UART_IER, 0x0f); /* enable all intrs */ in autoconfig_irq()
1398 serial_in(up, UART_LSR); in autoconfig_irq()
1399 serial_in(up, UART_RX); in autoconfig_irq()
1400 serial_in(up, UART_IIR); in autoconfig_irq()
1401 serial_in(up, UART_MSR); in autoconfig_irq()
1402 serial_out(up, UART_TX, 0xFF); in autoconfig_irq()
1406 serial8250_out_MCR(up, save_mcr); in autoconfig_irq()
1407 serial_out(up, UART_IER, save_ier); in autoconfig_irq()
1420 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_stop_rx() local
1422 serial8250_rpm_get(up); in serial8250_stop_rx()
1424 up->ier &= ~(UART_IER_RLSI | UART_IER_RDI); in serial8250_stop_rx()
1425 up->port.read_status_mask &= ~UART_LSR_DR; in serial8250_stop_rx()
1426 serial_port_out(port, UART_IER, up->ier); in serial8250_stop_rx()
1428 serial8250_rpm_put(up); in serial8250_stop_rx()
1548 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_stop_tx() local
1550 serial8250_rpm_get(up); in serial8250_stop_tx()
1551 __stop_tx(up); in serial8250_stop_tx()
1557 up->acr |= UART_ACR_TXDIS; in serial8250_stop_tx()
1558 serial_icr_write(up, UART_ACR, up->acr); in serial8250_stop_tx()
1560 serial8250_rpm_put(up); in serial8250_stop_tx()
1565 struct uart_8250_port *up = up_to_u8250p(port); in __start_tx() local
1567 if (up->dma && !up->dma->tx_dma(up)) in __start_tx()
1570 if (serial8250_set_THRI(up)) { in __start_tx()
1571 if (up->bugs & UART_BUG_TXEN) { in __start_tx()
1572 u16 lsr = serial_lsr_in(up); in __start_tx()
1575 serial8250_tx_chars(up); in __start_tx()
1582 if (port->type == PORT_16C950 && up->acr & UART_ACR_TXDIS) { in __start_tx()
1583 up->acr &= ~UART_ACR_TXDIS; in __start_tx()
1584 serial_icr_write(up, UART_ACR, up->acr); in __start_tx()
1590 * @up: uart 8250 port
1598 void serial8250_em485_start_tx(struct uart_8250_port *up) in serial8250_em485_start_tx() argument
1600 unsigned char mcr = serial8250_in_MCR(up); in serial8250_em485_start_tx()
1602 if (!(up->port.rs485.flags & SER_RS485_RX_DURING_TX)) in serial8250_em485_start_tx()
1603 serial8250_stop_rx(&up->port); in serial8250_em485_start_tx()
1605 if (up->port.rs485.flags & SER_RS485_RTS_ON_SEND) in serial8250_em485_start_tx()
1609 serial8250_out_MCR(up, mcr); in serial8250_em485_start_tx()
1616 struct uart_8250_port *up = up_to_u8250p(port); in start_tx_rs485() local
1617 struct uart_8250_em485 *em485 = up->em485; in start_tx_rs485()
1636 up->rs485_start_tx(up); in start_tx_rs485()
1638 if (up->port.rs485.delay_rts_before_send > 0) { in start_tx_rs485()
1641 up->port.rs485.delay_rts_before_send); in start_tx_rs485()
1668 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_start_tx() local
1669 struct uart_8250_em485 *em485 = up->em485; in serial8250_start_tx()
1674 serial8250_rpm_get_tx(up); in serial8250_start_tx()
1696 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_disable_ms() local
1699 if (up->bugs & UART_BUG_NOMSR) in serial8250_disable_ms()
1702 mctrl_gpio_disable_ms(up->gpios); in serial8250_disable_ms()
1704 up->ier &= ~UART_IER_MSI; in serial8250_disable_ms()
1705 serial_port_out(port, UART_IER, up->ier); in serial8250_disable_ms()
1710 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_enable_ms() local
1713 if (up->bugs & UART_BUG_NOMSR) in serial8250_enable_ms()
1716 mctrl_gpio_enable_ms(up->gpios); in serial8250_enable_ms()
1718 up->ier |= UART_IER_MSI; in serial8250_enable_ms()
1720 serial8250_rpm_get(up); in serial8250_enable_ms()
1721 serial_port_out(port, UART_IER, up->ier); in serial8250_enable_ms()
1722 serial8250_rpm_put(up); in serial8250_enable_ms()
1725 void serial8250_read_char(struct uart_8250_port *up, u16 lsr) in serial8250_read_char() argument
1727 struct uart_port *port = &up->port; in serial8250_read_char()
1732 ch = serial_in(up, UART_RX); in serial8250_read_char()
1745 lsr |= up->lsr_saved_flags; in serial8250_read_char()
1746 up->lsr_saved_flags = 0; in serial8250_read_char()
1794 u16 serial8250_rx_chars(struct uart_8250_port *up, u16 lsr) in serial8250_rx_chars() argument
1796 struct uart_port *port = &up->port; in serial8250_rx_chars()
1800 serial8250_read_char(up, lsr); in serial8250_rx_chars()
1803 lsr = serial_in(up, UART_LSR); in serial8250_rx_chars()
1811 void serial8250_tx_chars(struct uart_8250_port *up) in serial8250_tx_chars() argument
1813 struct uart_port *port = &up->port; in serial8250_tx_chars()
1826 __stop_tx(up); in serial8250_tx_chars()
1830 count = up->tx_loadsz; in serial8250_tx_chars()
1832 serial_out(up, UART_TX, xmit->buf[xmit->tail]); in serial8250_tx_chars()
1833 if (up->bugs & UART_BUG_TXRACE) { in serial8250_tx_chars()
1843 serial_in(up, UART_SCR); in serial8250_tx_chars()
1849 if ((up->capabilities & UART_CAP_HFIFO) && in serial8250_tx_chars()
1850 !uart_lsr_tx_empty(serial_in(up, UART_LSR))) in serial8250_tx_chars()
1853 if ((up->capabilities & UART_CAP_MINI) && in serial8250_tx_chars()
1854 !(serial_in(up, UART_LSR) & UART_LSR_THRE)) in serial8250_tx_chars()
1866 if (uart_circ_empty(xmit) && !(up->capabilities & UART_CAP_RPM)) in serial8250_tx_chars()
1867 __stop_tx(up); in serial8250_tx_chars()
1872 unsigned int serial8250_modem_status(struct uart_8250_port *up) in serial8250_modem_status() argument
1874 struct uart_port *port = &up->port; in serial8250_modem_status()
1875 unsigned int status = serial_in(up, UART_MSR); in serial8250_modem_status()
1877 status |= up->msr_saved_flags; in serial8250_modem_status()
1878 up->msr_saved_flags = 0; in serial8250_modem_status()
1879 if (status & UART_MSR_ANY_DELTA && up->ier & UART_IER_MSI && in serial8250_modem_status()
1897 static bool handle_rx_dma(struct uart_8250_port *up, unsigned int iir) in handle_rx_dma() argument
1901 if (!up->dma->rx_running) in handle_rx_dma()
1906 serial8250_rx_dma_flush(up); in handle_rx_dma()
1909 return up->dma->rx_dma(up); in handle_rx_dma()
1917 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_handle_irq() local
1927 status = serial_lsr_in(up); in serial8250_handle_irq()
1943 if (!up->dma || handle_rx_dma(up, iir)) in serial8250_handle_irq()
1944 status = serial8250_rx_chars(up, status); in serial8250_handle_irq()
1946 serial8250_modem_status(up); in serial8250_handle_irq()
1947 if ((status & UART_LSR_THRE) && (up->ier & UART_IER_THRI)) { in serial8250_handle_irq()
1948 if (!up->dma || up->dma->tx_err) in serial8250_handle_irq()
1949 serial8250_tx_chars(up); in serial8250_handle_irq()
1950 else if (!up->dma->tx_running) in serial8250_handle_irq()
1951 __stop_tx(up); in serial8250_handle_irq()
1962 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_default_handle_irq() local
1966 serial8250_rpm_get(up); in serial8250_default_handle_irq()
1971 serial8250_rpm_put(up); in serial8250_default_handle_irq()
1979 * has space available. Load it up with tx_loadsz bytes.
1986 /* TX Threshold IRQ triggered so load up FIFO */ in serial8250_tx_threshold_handle_irq()
1988 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_tx_threshold_handle_irq() local
1991 serial8250_tx_chars(up); in serial8250_tx_threshold_handle_irq()
2001 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_tx_empty() local
2005 serial8250_rpm_get(up); in serial8250_tx_empty()
2008 lsr = serial_lsr_in(up); in serial8250_tx_empty()
2011 serial8250_rpm_put(up); in serial8250_tx_empty()
2018 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_do_get_mctrl() local
2022 serial8250_rpm_get(up); in serial8250_do_get_mctrl()
2023 status = serial8250_modem_status(up); in serial8250_do_get_mctrl()
2024 serial8250_rpm_put(up); in serial8250_do_get_mctrl()
2027 if (up->gpios) in serial8250_do_get_mctrl()
2028 return mctrl_gpio_get(up->gpios, &val); in serial8250_do_get_mctrl()
2043 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_do_set_mctrl() local
2048 mcr |= up->mcr; in serial8250_do_set_mctrl()
2050 serial8250_out_MCR(up, mcr); in serial8250_do_set_mctrl()
2067 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_break_ctl() local
2070 serial8250_rpm_get(up); in serial8250_break_ctl()
2073 up->lcr |= UART_LCR_SBC; in serial8250_break_ctl()
2075 up->lcr &= ~UART_LCR_SBC; in serial8250_break_ctl()
2076 serial_port_out(port, UART_LCR, up->lcr); in serial8250_break_ctl()
2078 serial8250_rpm_put(up); in serial8250_break_ctl()
2081 static void wait_for_lsr(struct uart_8250_port *up, int bits) in wait_for_lsr() argument
2085 /* Wait up to 10ms for the character(s) to be sent. */ in wait_for_lsr()
2087 status = serial_lsr_in(up); in wait_for_lsr()
2101 static void wait_for_xmitr(struct uart_8250_port *up, int bits) in wait_for_xmitr() argument
2105 wait_for_lsr(up, bits); in wait_for_xmitr()
2107 /* Wait up to 1s for flow control if necessary */ in wait_for_xmitr()
2108 if (up->port.flags & UPF_CONS_FLOW) { in wait_for_xmitr()
2110 unsigned int msr = serial_in(up, UART_MSR); in wait_for_xmitr()
2111 up->msr_saved_flags |= msr & MSR_SAVE_FLAGS; in wait_for_xmitr()
2128 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_get_poll_char() local
2132 serial8250_rpm_get(up); in serial8250_get_poll_char()
2143 serial8250_rpm_put(up); in serial8250_get_poll_char()
2152 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_put_poll_char() local
2154 serial8250_rpm_get(up); in serial8250_put_poll_char()
2159 serial8250_clear_IER(up); in serial8250_put_poll_char()
2161 wait_for_xmitr(up, UART_LSR_BOTH_EMPTY); in serial8250_put_poll_char()
2171 wait_for_xmitr(up, UART_LSR_BOTH_EMPTY); in serial8250_put_poll_char()
2173 serial8250_rpm_put(up); in serial8250_put_poll_char()
2180 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_do_startup() local
2188 if (!up->tx_loadsz) in serial8250_do_startup()
2189 up->tx_loadsz = uart_config[port->type].tx_loadsz; in serial8250_do_startup()
2190 if (!up->capabilities) in serial8250_do_startup()
2191 up->capabilities = uart_config[port->type].flags; in serial8250_do_startup()
2192 up->mcr = 0; in serial8250_do_startup()
2194 if (port->iotype != up->cur_iotype) in serial8250_do_startup()
2197 serial8250_rpm_get(up); in serial8250_do_startup()
2199 /* Wake up and initialize UART */ in serial8250_do_startup()
2200 up->acr = 0; in serial8250_do_startup()
2205 serial_icr_write(up, UART_CSR, 0); /* Reset the UART */ in serial8250_do_startup()
2235 * If this is an RSA port, see if we can kick it up to the in serial8250_do_startup()
2238 enable_rsa(up); in serial8250_do_startup()
2245 serial8250_clear_fifos(up); in serial8250_do_startup()
2273 serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); in serial8250_do_startup()
2275 fctr = serial_in(up, UART_FCTR) & ~(UART_FCTR_RX|UART_FCTR_TX); in serial8250_do_startup()
2293 if ((up->tx_loadsz < 2) || (up->tx_loadsz > port->fifosize)) { in serial8250_do_startup()
2299 port->fifosize - up->tx_loadsz); in serial8250_do_startup()
2305 if (port->irq && (up->port.flags & UPF_SHARE_IRQ)) in serial8250_do_startup()
2306 up->port.irqflags |= IRQF_SHARED; in serial8250_do_startup()
2308 retval = up->ops->setup_irq(up); in serial8250_do_startup()
2312 if (port->irq && !(up->port.flags & UPF_NO_THRE_TEST)) { in serial8250_do_startup()
2328 wait_for_xmitr(up, UART_LSR_THRE); in serial8250_do_startup()
2349 up->port.flags & UPF_BUG_THRE) { in serial8250_do_startup()
2350 up->bugs |= UART_BUG_THRE; in serial8250_do_startup()
2354 up->ops->setup_timer(up); in serial8250_do_startup()
2362 if (up->port.flags & UPF_FOURPORT) { in serial8250_do_startup()
2363 if (!up->port.irq) in serial8250_do_startup()
2364 up->port.mctrl |= TIOCM_OUT1; in serial8250_do_startup()
2370 up->port.mctrl |= TIOCM_OUT2; in serial8250_do_startup()
2385 if (up->port.quirks & UPQ_NO_TXEN_TEST) in serial8250_do_startup()
2398 if (!(up->bugs & UART_BUG_TXEN)) { in serial8250_do_startup()
2399 up->bugs |= UART_BUG_TXEN; in serial8250_do_startup()
2403 up->bugs &= ~UART_BUG_TXEN; in serial8250_do_startup()
2418 up->lsr_saved_flags = 0; in serial8250_do_startup()
2419 up->msr_saved_flags = 0; in serial8250_do_startup()
2424 if (up->dma) { in serial8250_do_startup()
2429 else if (serial8250_request_dma(up)) in serial8250_do_startup()
2433 up->dma = NULL; in serial8250_do_startup()
2442 up->ier = UART_IER_RLSI | UART_IER_RDI; in serial8250_do_startup()
2455 serial8250_rpm_put(up); in serial8250_do_startup()
2469 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_do_shutdown() local
2472 serial8250_rpm_get(up); in serial8250_do_shutdown()
2477 up->ier = 0; in serial8250_do_shutdown()
2483 if (up->dma) in serial8250_do_shutdown()
2484 serial8250_release_dma(up); in serial8250_do_shutdown()
2502 serial8250_clear_fifos(up); in serial8250_do_shutdown()
2508 disable_rsa(up); in serial8250_do_shutdown()
2516 serial8250_rpm_put(up); in serial8250_do_shutdown()
2518 up->ops->release_irq(up); in serial8250_do_shutdown()
2531 static unsigned int npcm_get_divisor(struct uart_8250_port *up, in npcm_get_divisor() argument
2534 struct uart_port *port = &up->port; in npcm_get_divisor()
2544 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_do_get_divisor() local
2550 * up to clk/4 (0x8001) and clk/8 (0x8002) respectively. These in serial8250_do_get_divisor()
2583 else if (up->port.type == PORT_NPCM) in serial8250_do_get_divisor()
2584 quot = npcm_get_divisor(up, baud); in serial8250_do_get_divisor()
2591 if (up->bugs & UART_BUG_QUOT && (quot & 0xff) == 0) in serial8250_do_get_divisor()
2607 static unsigned char serial8250_compute_lcr(struct uart_8250_port *up, in serial8250_compute_lcr() argument
2618 if (up->bugs & UART_BUG_PARITY) in serial8250_compute_lcr()
2619 up->fifo_bug = true; in serial8250_compute_lcr()
2632 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_do_set_divisor() local
2635 if (is_omap1510_8250(up)) { in serial8250_do_set_divisor()
2647 if (up->capabilities & UART_NATSEMI) in serial8250_do_set_divisor()
2650 serial_port_out(port, UART_LCR, up->lcr | UART_LCR_DLAB); in serial8250_do_set_divisor()
2652 serial_dl_write(up, quot); in serial8250_do_set_divisor()
2702 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_update_uartclk() local
2733 serial8250_rpm_get(up); in serial8250_update_uartclk()
2739 serial_port_out(port, UART_LCR, up->lcr); in serial8250_update_uartclk()
2742 serial8250_rpm_put(up); in serial8250_update_uartclk()
2755 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_do_set_termios() local
2760 if (up->capabilities & UART_CAP_MINI) { in serial8250_do_set_termios()
2766 cval = serial8250_compute_lcr(up, termios->c_cflag); in serial8250_do_set_termios()
2775 serial8250_rpm_get(up); in serial8250_do_set_termios()
2778 up->lcr = cval; /* Save computed LCR */ in serial8250_do_set_termios()
2780 if (up->capabilities & UART_CAP_FIFO && port->fifosize > 1) { in serial8250_do_set_termios()
2782 if ((baud < 2400 && !up->dma) || up->fifo_bug) { in serial8250_do_set_termios()
2783 up->fcr &= ~UART_FCR_TRIGGER_MASK; in serial8250_do_set_termios()
2784 up->fcr |= UART_FCR_TRIGGER_1; in serial8250_do_set_termios()
2793 if (up->capabilities & UART_CAP_AFE) { in serial8250_do_set_termios()
2794 up->mcr &= ~UART_MCR_AFE; in serial8250_do_set_termios()
2796 up->mcr |= UART_MCR_AFE; in serial8250_do_set_termios()
2835 up->ier &= ~UART_IER_MSI; in serial8250_do_set_termios()
2836 if (!(up->bugs & UART_BUG_NOMSR) && in serial8250_do_set_termios()
2837 UART_ENABLE_MS(&up->port, termios->c_cflag)) in serial8250_do_set_termios()
2838 up->ier |= UART_IER_MSI; in serial8250_do_set_termios()
2839 if (up->capabilities & UART_CAP_UUE) in serial8250_do_set_termios()
2840 up->ier |= UART_IER_UUE; in serial8250_do_set_termios()
2841 if (up->capabilities & UART_CAP_RTOIE) in serial8250_do_set_termios()
2842 up->ier |= UART_IER_RTOIE; in serial8250_do_set_termios()
2844 serial_port_out(port, UART_IER, up->ier); in serial8250_do_set_termios()
2846 if (up->capabilities & UART_CAP_EFR) { in serial8250_do_set_termios()
2870 serial_port_out(port, UART_FCR, up->fcr); in serial8250_do_set_termios()
2872 serial_port_out(port, UART_LCR, up->lcr); /* reset DLAB */ in serial8250_do_set_termios()
2875 if (up->fcr & UART_FCR_ENABLE_FIFO) in serial8250_do_set_termios()
2877 serial_port_out(port, UART_FCR, up->fcr); /* set fcr */ in serial8250_do_set_termios()
2881 serial8250_rpm_put(up); in serial8250_do_set_termios()
2963 static int serial8250_request_std_resource(struct uart_8250_port *up) in serial8250_request_std_resource() argument
2965 unsigned int size = serial8250_port_size(up); in serial8250_request_std_resource()
2966 struct uart_port *port = &up->port; in serial8250_request_std_resource()
3004 static void serial8250_release_std_resource(struct uart_8250_port *up) in serial8250_release_std_resource() argument
3006 unsigned int size = serial8250_port_size(up); in serial8250_release_std_resource()
3007 struct uart_port *port = &up->port; in serial8250_release_std_resource()
3036 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_release_port() local
3038 serial8250_release_std_resource(up); in serial8250_release_port()
3043 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_request_port() local
3045 return serial8250_request_std_resource(up); in serial8250_request_port()
3048 static int fcr_get_rxtrig_bytes(struct uart_8250_port *up) in fcr_get_rxtrig_bytes() argument
3050 const struct serial8250_config *conf_type = &uart_config[up->port.type]; in fcr_get_rxtrig_bytes()
3053 bytes = conf_type->rxtrig_bytes[UART_FCR_R_TRIG_BITS(up->fcr)]; in fcr_get_rxtrig_bytes()
3058 static int bytes_to_fcr_rxtrig(struct uart_8250_port *up, unsigned char bytes) in bytes_to_fcr_rxtrig() argument
3060 const struct serial8250_config *conf_type = &uart_config[up->port.type]; in bytes_to_fcr_rxtrig()
3079 struct uart_8250_port *up = up_to_u8250p(uport); in do_get_rxtrig() local
3081 if (!(up->capabilities & UART_CAP_FIFO) || uport->fifosize <= 1) in do_get_rxtrig()
3084 return fcr_get_rxtrig_bytes(up); in do_get_rxtrig()
3115 struct uart_8250_port *up = up_to_u8250p(uport); in do_set_rxtrig() local
3118 if (!(up->capabilities & UART_CAP_FIFO) || uport->fifosize <= 1 || in do_set_rxtrig()
3119 up->fifo_bug) in do_set_rxtrig()
3122 rxtrig = bytes_to_fcr_rxtrig(up, bytes); in do_set_rxtrig()
3126 serial8250_clear_fifos(up); in do_set_rxtrig()
3127 up->fcr &= ~UART_FCR_TRIGGER_MASK; in do_set_rxtrig()
3128 up->fcr |= (unsigned char)rxtrig; in do_set_rxtrig()
3129 serial_out(up, UART_FCR, up->fcr); in do_set_rxtrig()
3176 static void register_dev_spec_attr_grp(struct uart_8250_port *up) in register_dev_spec_attr_grp() argument
3178 const struct serial8250_config *conf_type = &uart_config[up->port.type]; in register_dev_spec_attr_grp()
3181 up->port.attr_group = &serial8250_dev_attr_group; in register_dev_spec_attr_grp()
3186 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_config_port() local
3193 ret = serial8250_request_std_resource(up); in serial8250_config_port()
3197 if (port->iotype != up->cur_iotype) in serial8250_config_port()
3201 autoconfig(up); in serial8250_config_port()
3205 up->bugs |= UART_BUG_NOMSR; in serial8250_config_port()
3209 up->bugs |= UART_BUG_NOMSR; in serial8250_config_port()
3212 autoconfig_irq(up); in serial8250_config_port()
3215 serial8250_release_std_resource(up); in serial8250_config_port()
3217 register_dev_spec_attr_grp(up); in serial8250_config_port()
3218 up->fcr = uart_config[up->port.type].fcr; in serial8250_config_port()
3268 void serial8250_init_port(struct uart_8250_port *up) in serial8250_init_port() argument
3270 struct uart_port *port = &up->port; in serial8250_init_port()
3276 up->cur_iotype = 0xFF; in serial8250_init_port()
3280 void serial8250_set_defaults(struct uart_8250_port *up) in serial8250_set_defaults() argument
3282 struct uart_port *port = &up->port; in serial8250_set_defaults()
3284 if (up->port.flags & UPF_FIXED_TYPE) { in serial8250_set_defaults()
3285 unsigned int type = up->port.type; in serial8250_set_defaults()
3287 if (!up->port.fifosize) in serial8250_set_defaults()
3288 up->port.fifosize = uart_config[type].fifo_size; in serial8250_set_defaults()
3289 if (!up->tx_loadsz) in serial8250_set_defaults()
3290 up->tx_loadsz = uart_config[type].tx_loadsz; in serial8250_set_defaults()
3291 if (!up->capabilities) in serial8250_set_defaults()
3292 up->capabilities = uart_config[type].flags; in serial8250_set_defaults()
3298 if (up->dma) { in serial8250_set_defaults()
3299 if (!up->dma->tx_dma) in serial8250_set_defaults()
3300 up->dma->tx_dma = serial8250_tx_dma; in serial8250_set_defaults()
3301 if (!up->dma->rx_dma) in serial8250_set_defaults()
3302 up->dma->rx_dma = serial8250_rx_dma; in serial8250_set_defaults()
3311 struct uart_8250_port *up = up_to_u8250p(port); in serial8250_console_putchar() local
3313 wait_for_xmitr(up, UART_LSR_THRE); in serial8250_console_putchar()
3320 static void serial8250_console_restore(struct uart_8250_port *up) in serial8250_console_restore() argument
3322 struct uart_port *port = &up->port; in serial8250_console_restore()
3339 serial_port_out(port, UART_LCR, up->lcr); in serial8250_console_restore()
3340 serial8250_out_MCR(up, up->mcr | UART_MCR_DTR | UART_MCR_RTS); in serial8250_console_restore()
3349 static void serial8250_console_fifo_write(struct uart_8250_port *up, in serial8250_console_fifo_write() argument
3354 unsigned int fifosize = up->tx_loadsz; in serial8250_console_fifo_write()
3358 wait_for_lsr(up, UART_LSR_THRE); in serial8250_console_fifo_write()
3362 serial_out(up, UART_TX, '\r'); in serial8250_console_fifo_write()
3365 serial_out(up, UART_TX, *s++); in serial8250_console_fifo_write()
3379 * Thus, we assume the function is called when device is powered up.
3381 void serial8250_console_write(struct uart_8250_port *up, const char *s, in serial8250_console_write() argument
3384 struct uart_8250_em485 *em485 = up->em485; in serial8250_console_write()
3385 struct uart_port *port = &up->port; in serial8250_console_write()
3401 serial8250_clear_IER(up); in serial8250_console_write()
3404 if (up->canary && (up->canary != serial_port_in(port, UART_SCR))) { in serial8250_console_write()
3405 serial8250_console_restore(up); in serial8250_console_write()
3406 up->canary = 0; in serial8250_console_write()
3411 up->rs485_start_tx(up); in serial8250_console_write()
3415 use_fifo = (up->capabilities & UART_CAP_FIFO) && in serial8250_console_write()
3420 !(up->capabilities & UART_CAP_MINI) && in serial8250_console_write()
3424 up->tx_loadsz > 1 && in serial8250_console_write()
3425 (up->fcr & UART_FCR_ENABLE_FIFO) && in serial8250_console_write()
3433 !(up->port.flags & UPF_CONS_FLOW); in serial8250_console_write()
3436 serial8250_console_fifo_write(up, s, count); in serial8250_console_write()
3444 wait_for_xmitr(up, UART_LSR_BOTH_EMPTY); in serial8250_console_write()
3449 up->rs485_stop_tx(up); in serial8250_console_write()
3461 if (up->msr_saved_flags) in serial8250_console_write()
3462 serial8250_modem_status(up); in serial8250_console_write()