static void serial_omap_restore_context(struct uart_omap_port *up) { if (up->errata & UART_ERRATA_i202_MDR1_ACCESS) serial_omap_mdr1_errataset(up, UART_OMAP_MDR1_DISABLE); else serial_out(up, UART_OMAP_MDR1, UART_OMAP_MDR1_DISABLE); serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); serial_out(up, UART_EFR, UART_EFR_ECB); serial_out(up, UART_LCR, 0x0); serial_out(up, UART_IER, 0x0); serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); serial_out(up, UART_DLL, up->dll); serial_out(up, UART_DLM, up->dlh); serial_out(up, UART_LCR, 0x0); serial_out(up, UART_IER, up->ier); serial_out(up, UART_FCR, up->fcr); serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A); serial_out(up, UART_MCR, up->mcr); serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); serial_out(up, UART_OMAP_SCR, up->scr); serial_out(up, UART_EFR, up->efr); serial_out(up, UART_LCR, up->lcr); if (up->errata & UART_ERRATA_i202_MDR1_ACCESS) serial_omap_mdr1_errataset(up, up->mdr1); else serial_out(up, UART_OMAP_MDR1, up->mdr1); }
static void serial_omap_set_termios(struct uart_port *port, struct ktermios *termios, struct ktermios *old) { struct uart_omap_port *up = (struct uart_omap_port *)port; unsigned char cval = 0; unsigned char efr = 0; unsigned long flags = 0; unsigned int baud, quot; switch (termios->c_cflag & CSIZE) { case CS5: cval = UART_LCR_WLEN5; break; case CS6: cval = UART_LCR_WLEN6; break; case CS7: cval = UART_LCR_WLEN7; break; default: case CS8: cval = UART_LCR_WLEN8; break; } if (termios->c_cflag & CSTOPB) cval |= UART_LCR_STOP; if (termios->c_cflag & PARENB) cval |= UART_LCR_PARITY; if (!(termios->c_cflag & PARODD)) cval |= UART_LCR_EPAR; baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/13); quot = serial_omap_get_divisor(port, baud); up->calc_latency = (USEC_PER_SEC * up->port.fifosize) / (baud / 8); up->latency = up->calc_latency; schedule_work(&up->qos_work); up->dll = quot & 0xff; up->dlh = quot >> 8; up->mdr1 = UART_OMAP_MDR1_DISABLE; up->fcr = UART_FCR_R_TRIG_01 | UART_FCR_T_TRIG_01 | UART_FCR_ENABLE_FIFO; if (up->use_dma) up->fcr |= UART_FCR_DMA_SELECT; pm_runtime_get_sync(&up->pdev->dev); spin_lock_irqsave(&up->port.lock, flags); uart_update_timeout(port, termios->c_cflag, baud); up->port.read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR; if (termios->c_iflag & INPCK) up->port.read_status_mask |= UART_LSR_FE | UART_LSR_PE; if (termios->c_iflag & (BRKINT | PARMRK)) up->port.read_status_mask |= UART_LSR_BI; up->port.ignore_status_mask = 0; if (termios->c_iflag & IGNPAR) up->port.ignore_status_mask |= UART_LSR_PE | UART_LSR_FE; if (termios->c_iflag & IGNBRK) { up->port.ignore_status_mask |= UART_LSR_BI; if (termios->c_iflag & IGNPAR) up->port.ignore_status_mask |= UART_LSR_OE; } if ((termios->c_cflag & CREAD) == 0) up->port.ignore_status_mask |= UART_LSR_DR; up->ier &= ~UART_IER_MSI; if (UART_ENABLE_MS(&up->port, termios->c_cflag)) up->ier |= UART_IER_MSI; serial_out(up, UART_IER, up->ier); serial_out(up, UART_LCR, cval); up->lcr = cval; up->scr = OMAP_UART_SCR_TX_EMPTY; serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A); serial_out(up, UART_DLL, 0); serial_out(up, UART_DLM, 0); serial_out(up, UART_LCR, 0); serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); up->efr = serial_in(up, UART_EFR); serial_out(up, UART_EFR, up->efr | UART_EFR_ECB); serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A); up->mcr = serial_in(up, UART_MCR); serial_out(up, UART_MCR, up->mcr | UART_MCR_TCRTLR); up->scr |= OMAP_UART_SCR_RX_TRIG_GRANU1_MASK; if (up->use_dma) { serial_out(up, UART_TI752_TLR, 0); up->scr |= UART_FCR_TRIGGER_4; } else { up->fcr &= ~OMAP_UART_FCR_RX_FIFO_TRIG_MASK; up->fcr |= (0x1 << OMAP_UART_FCR_RX_FIFO_TRIG_SHIFT); } serial_out(up, UART_FCR, up->fcr); serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); serial_out(up, UART_OMAP_SCR, up->scr); serial_out(up, UART_EFR, up->efr); serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A); serial_out(up, UART_MCR, up->mcr); if (up->errata & UART_ERRATA_i202_MDR1_ACCESS) serial_omap_mdr1_errataset(up, up->mdr1); else serial_out(up, UART_OMAP_MDR1, up->mdr1); serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); up->efr = serial_in(up, UART_EFR); serial_out(up, UART_EFR, up->efr | UART_EFR_ECB); serial_out(up, UART_LCR, 0); serial_out(up, UART_IER, 0); serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); serial_out(up, UART_DLL, up->dll); serial_out(up, UART_DLM, up->dlh); serial_out(up, UART_LCR, 0); serial_out(up, UART_IER, up->ier); serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); serial_out(up, UART_EFR, up->efr); serial_out(up, UART_LCR, cval); if (baud > 230400 && baud != 3000000) up->mdr1 = UART_OMAP_MDR1_13X_MODE; else up->mdr1 = UART_OMAP_MDR1_16X_MODE; if (up->errata & UART_ERRATA_i202_MDR1_ACCESS) serial_omap_mdr1_errataset(up, up->mdr1); else serial_out(up, UART_OMAP_MDR1, up->mdr1); if (termios->c_cflag & CRTSCTS) { efr |= (UART_EFR_CTS | UART_EFR_RTS); serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A); up->mcr = serial_in(up, UART_MCR); serial_out(up, UART_MCR, up->mcr | UART_MCR_TCRTLR); serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); up->efr = serial_in(up, UART_EFR); serial_out(up, UART_EFR, up->efr | UART_EFR_ECB); serial_out(up, UART_TI752_TCR, OMAP_UART_TCR_TRIG); serial_out(up, UART_EFR, efr); serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A); serial_out(up, UART_MCR, up->mcr | UART_MCR_RTS); serial_out(up, UART_LCR, cval); } serial_omap_set_mctrl(&up->port, up->port.mctrl); serial_omap_configure_xonxoff(up, termios); spin_unlock_irqrestore(&up->port.lock, flags); pm_runtime_put(&up->pdev->dev); dev_dbg(up->port.dev, "serial_omap_set_termios+%d\n", up->port.line); }
static void serial_omap_set_termios(struct uart_port *port, struct ktermios *termios, struct ktermios *old) { struct uart_omap_port *up = to_uart_omap_port(port); unsigned char cval = 0; unsigned long flags = 0; unsigned int baud, quot; switch (termios->c_cflag & CSIZE) { case CS5: cval = UART_LCR_WLEN5; break; case CS6: cval = UART_LCR_WLEN6; break; case CS7: cval = UART_LCR_WLEN7; break; default: case CS8: cval = UART_LCR_WLEN8; break; } if (termios->c_cflag & CSTOPB) cval |= UART_LCR_STOP; if (termios->c_cflag & PARENB) cval |= UART_LCR_PARITY; if (!(termios->c_cflag & PARODD)) cval |= UART_LCR_EPAR; if (termios->c_cflag & CMSPAR) cval |= UART_LCR_SPAR; /* * Ask the core to calculate the divisor for us. */ baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/13); quot = serial_omap_get_divisor(port, baud); /* calculate wakeup latency constraint */ up->calc_latency = (USEC_PER_SEC * up->port.fifosize) / (baud / 8); up->latency = up->calc_latency; schedule_work(&up->qos_work); up->dll = quot & 0xff; up->dlh = quot >> 8; up->mdr1 = UART_OMAP_MDR1_DISABLE; up->fcr = UART_FCR_R_TRIG_01 | UART_FCR_T_TRIG_01 | UART_FCR_ENABLE_FIFO; /* * Ok, we're now changing the port state. Do it with * interrupts disabled. */ pm_runtime_get_sync(up->dev); spin_lock_irqsave(&up->port.lock, flags); /* * Update the per-port timeout. */ uart_update_timeout(port, termios->c_cflag, baud); up->port.read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR; if (termios->c_iflag & INPCK) up->port.read_status_mask |= UART_LSR_FE | UART_LSR_PE; if (termios->c_iflag & (BRKINT | PARMRK)) up->port.read_status_mask |= UART_LSR_BI; /* * Characters to ignore */ up->port.ignore_status_mask = 0; if (termios->c_iflag & IGNPAR) up->port.ignore_status_mask |= UART_LSR_PE | UART_LSR_FE; if (termios->c_iflag & IGNBRK) { up->port.ignore_status_mask |= UART_LSR_BI; /* * If we're ignoring parity and break indicators, * ignore overruns too (for real raw support). */ if (termios->c_iflag & IGNPAR) up->port.ignore_status_mask |= UART_LSR_OE; } /* * ignore all characters if CREAD is not set */ if ((termios->c_cflag & CREAD) == 0) up->port.ignore_status_mask |= UART_LSR_DR; /* * Modem status interrupts */ up->ier &= ~UART_IER_MSI; if (UART_ENABLE_MS(&up->port, termios->c_cflag)) up->ier |= UART_IER_MSI; serial_out(up, UART_IER, up->ier); serial_out(up, UART_LCR, cval); /* reset DLAB */ up->lcr = cval; up->scr = 0; /* FIFOs and DMA Settings */ /* FCR can be changed only when the * baud clock is not running * DLL_REG and DLH_REG set to 0. */ serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A); serial_out(up, UART_DLL, 0); serial_out(up, UART_DLM, 0); serial_out(up, UART_LCR, 0); serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); up->efr = serial_in(up, UART_EFR) & ~UART_EFR_ECB; up->efr &= ~UART_EFR_SCD; serial_out(up, UART_EFR, up->efr | UART_EFR_ECB); serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A); up->mcr = serial_in(up, UART_MCR) & ~UART_MCR_TCRTLR; serial_out(up, UART_MCR, up->mcr | UART_MCR_TCRTLR); /* FIFO ENABLE, DMA MODE */ up->scr |= OMAP_UART_SCR_RX_TRIG_GRANU1_MASK; /* * NOTE: Setting OMAP_UART_SCR_RX_TRIG_GRANU1_MASK * sets Enables the granularity of 1 for TRIGGER RX * level. Along with setting RX FIFO trigger level * to 1 (as noted below, 16 characters) and TLR[3:0] * to zero this will result RX FIFO threshold level * to 1 character, instead of 16 as noted in comment * below. */ /* Set receive FIFO threshold to 16 characters and * transmit FIFO threshold to 32 spaces */ up->fcr &= ~OMAP_UART_FCR_RX_FIFO_TRIG_MASK; up->fcr &= ~OMAP_UART_FCR_TX_FIFO_TRIG_MASK; up->fcr |= UART_FCR6_R_TRIGGER_16 | UART_FCR6_T_TRIGGER_24 | UART_FCR_ENABLE_FIFO; serial_out(up, UART_FCR, up->fcr); serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); serial_out(up, UART_OMAP_SCR, up->scr); /* Reset UART_MCR_TCRTLR: this must be done with the EFR_ECB bit set */ serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A); serial_out(up, UART_MCR, up->mcr); serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); serial_out(up, UART_EFR, up->efr); serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A); /* Protocol, Baud Rate, and Interrupt Settings */ if (up->errata & UART_ERRATA_i202_MDR1_ACCESS) serial_omap_mdr1_errataset(up, up->mdr1); else serial_out(up, UART_OMAP_MDR1, up->mdr1); serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); serial_out(up, UART_EFR, up->efr | UART_EFR_ECB); serial_out(up, UART_LCR, 0); serial_out(up, UART_IER, 0); serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); serial_out(up, UART_DLL, up->dll); /* LS of divisor */ serial_out(up, UART_DLM, up->dlh); /* MS of divisor */ serial_out(up, UART_LCR, 0); serial_out(up, UART_IER, up->ier); serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); serial_out(up, UART_EFR, up->efr); serial_out(up, UART_LCR, cval); if (!serial_omap_baud_is_mode16(port, baud)) up->mdr1 = UART_OMAP_MDR1_13X_MODE; else up->mdr1 = UART_OMAP_MDR1_16X_MODE; if (up->errata & UART_ERRATA_i202_MDR1_ACCESS) serial_omap_mdr1_errataset(up, up->mdr1); else serial_out(up, UART_OMAP_MDR1, up->mdr1); /* Configure flow control */ serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); /* XON1/XOFF1 accessible mode B, TCRTLR=0, ECB=0 */ serial_out(up, UART_XON1, termios->c_cc[VSTART]); serial_out(up, UART_XOFF1, termios->c_cc[VSTOP]); /* Enable access to TCR/TLR */ serial_out(up, UART_EFR, up->efr | UART_EFR_ECB); serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A); serial_out(up, UART_MCR, up->mcr | UART_MCR_TCRTLR); serial_out(up, UART_TI752_TCR, OMAP_UART_TCR_TRIG); up->port.status &= ~(UPSTAT_AUTOCTS | UPSTAT_AUTORTS | UPSTAT_AUTOXOFF); if (termios->c_cflag & CRTSCTS && up->port.flags & UPF_HARD_FLOW) { /* Enable AUTOCTS (autoRTS is enabled when RTS is raised) */ up->port.status |= UPSTAT_AUTOCTS | UPSTAT_AUTORTS; up->efr |= UART_EFR_CTS; } else { /* Disable AUTORTS and AUTOCTS */ up->efr &= ~(UART_EFR_CTS | UART_EFR_RTS); } if (up->port.flags & UPF_SOFT_FLOW) { /* clear SW control mode bits */ up->efr &= OMAP_UART_SW_CLR; /* * IXON Flag: * Enable XON/XOFF flow control on input. * Receiver compares XON1, XOFF1. */ if (termios->c_iflag & IXON) up->efr |= OMAP_UART_SW_RX; /* * IXOFF Flag: * Enable XON/XOFF flow control on output. * Transmit XON1, XOFF1 */ if (termios->c_iflag & IXOFF) { up->port.status |= UPSTAT_AUTOXOFF; up->efr |= OMAP_UART_SW_TX; } /* * IXANY Flag: * Enable any character to restart output. * Operation resumes after receiving any * character after recognition of the XOFF character */ if (termios->c_iflag & IXANY) up->mcr |= UART_MCR_XONANY; else up->mcr &= ~UART_MCR_XONANY; } serial_out(up, UART_MCR, up->mcr); serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); serial_out(up, UART_EFR, up->efr); serial_out(up, UART_LCR, up->lcr); serial_omap_set_mctrl(&up->port, up->port.mctrl); spin_unlock_irqrestore(&up->port.lock, flags); pm_runtime_mark_last_busy(up->dev); pm_runtime_put_autosuspend(up->dev); dev_dbg(up->port.dev, "serial_omap_set_termios+%d\n", up->port.line); }
static void serial_omap_set_termios(struct uart_port *port, struct ktermios *termios, struct ktermios *old) { struct uart_omap_port *up = (struct uart_omap_port *)port; unsigned char cval = 0; unsigned char efr = 0; unsigned long flags = 0; unsigned int baud, quot; switch (termios->c_cflag & CSIZE) { case CS5: cval = UART_LCR_WLEN5; break; case CS6: cval = UART_LCR_WLEN6; break; case CS7: cval = UART_LCR_WLEN7; break; default: case CS8: cval = UART_LCR_WLEN8; break; } if (termios->c_cflag & CSTOPB) cval |= UART_LCR_STOP; if (termios->c_cflag & PARENB) cval |= UART_LCR_PARITY; if (!(termios->c_cflag & PARODD)) cval |= UART_LCR_EPAR; /* * Ask the core to calculate the divisor for us. */ baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/13); quot = serial_omap_get_divisor(port, baud); /* calculate wakeup latency constraint */ up->calc_latency = (USEC_PER_SEC * up->port.fifosize) / (baud / 8); up->latency = up->calc_latency; schedule_work(&up->qos_work); up->dll = quot & 0xff; up->dlh = quot >> 8; up->mdr1 = UART_OMAP_MDR1_DISABLE; up->fcr = UART_FCR_R_TRIG_01 | UART_FCR_T_TRIG_01 | UART_FCR_ENABLE_FIFO; if (up->use_dma) up->fcr |= UART_FCR_DMA_SELECT; /* * Ok, we're now changing the port state. Do it with * interrupts disabled. */ pm_runtime_get_sync(&up->pdev->dev); spin_lock_irqsave(&up->port.lock, flags); /* * Update the per-port timeout. */ uart_update_timeout(port, termios->c_cflag, baud); up->port.read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR; if (termios->c_iflag & INPCK) up->port.read_status_mask |= UART_LSR_FE | UART_LSR_PE; if (termios->c_iflag & (BRKINT | PARMRK)) up->port.read_status_mask |= UART_LSR_BI; /* * Characters to ignore */ up->port.ignore_status_mask = 0; if (termios->c_iflag & IGNPAR) up->port.ignore_status_mask |= UART_LSR_PE | UART_LSR_FE; if (termios->c_iflag & IGNBRK) { up->port.ignore_status_mask |= UART_LSR_BI; /* * If we're ignoring parity and break indicators, * ignore overruns too (for real raw support). */ if (termios->c_iflag & IGNPAR) up->port.ignore_status_mask |= UART_LSR_OE; } /* * ignore all characters if CREAD is not set */ if ((termios->c_cflag & CREAD) == 0) up->port.ignore_status_mask |= UART_LSR_DR; /* * Modem status interrupts */ up->ier &= ~UART_IER_MSI; if (UART_ENABLE_MS(&up->port, termios->c_cflag)) up->ier |= UART_IER_MSI; serial_out(up, UART_IER, up->ier); serial_out(up, UART_LCR, cval); /* reset DLAB */ up->lcr = cval; up->scr = OMAP_UART_SCR_TX_EMPTY; /* FIFOs and DMA Settings */ /* FCR can be changed only when the * baud clock is not running * DLL_REG and DLH_REG set to 0. */ serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A); serial_out(up, UART_DLL, 0); serial_out(up, UART_DLM, 0); serial_out(up, UART_LCR, 0); serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); up->efr = serial_in(up, UART_EFR); serial_out(up, UART_EFR, up->efr | UART_EFR_ECB); serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A); up->mcr = serial_in(up, UART_MCR); serial_out(up, UART_MCR, up->mcr | UART_MCR_TCRTLR); /* FIFO ENABLE, DMA MODE */ up->scr |= OMAP_UART_SCR_RX_TRIG_GRANU1_MASK; if (up->use_dma) { serial_out(up, UART_TI752_TLR, 0); up->scr |= UART_FCR_TRIGGER_4; } else { /* Set receive FIFO threshold to 1 byte */ up->fcr &= ~OMAP_UART_FCR_RX_FIFO_TRIG_MASK; up->fcr |= (0x1 << OMAP_UART_FCR_RX_FIFO_TRIG_SHIFT); } serial_out(up, UART_FCR, up->fcr); serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); serial_out(up, UART_OMAP_SCR, up->scr); serial_out(up, UART_EFR, up->efr); serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A); serial_out(up, UART_MCR, up->mcr); /* Protocol, Baud Rate, and Interrupt Settings */ if (up->errata & UART_ERRATA_i202_MDR1_ACCESS) serial_omap_mdr1_errataset(up, up->mdr1); else serial_out(up, UART_OMAP_MDR1, up->mdr1); serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); up->efr = serial_in(up, UART_EFR); serial_out(up, UART_EFR, up->efr | UART_EFR_ECB); serial_out(up, UART_LCR, 0); serial_out(up, UART_IER, 0); serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); serial_out(up, UART_DLL, up->dll); /* LS of divisor */ serial_out(up, UART_DLM, up->dlh); /* MS of divisor */ serial_out(up, UART_LCR, 0); serial_out(up, UART_IER, up->ier); serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); serial_out(up, UART_EFR, up->efr); serial_out(up, UART_LCR, cval); if (baud > 230400 && baud != 3000000) up->mdr1 = UART_OMAP_MDR1_13X_MODE; else up->mdr1 = UART_OMAP_MDR1_16X_MODE; if (up->errata & UART_ERRATA_i202_MDR1_ACCESS) serial_omap_mdr1_errataset(up, up->mdr1); else serial_out(up, UART_OMAP_MDR1, up->mdr1); /* Hardware Flow Control Configuration */ if (termios->c_cflag & CRTSCTS) { efr |= (UART_EFR_CTS | UART_EFR_RTS); serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A); up->mcr = serial_in(up, UART_MCR); serial_out(up, UART_MCR, up->mcr | UART_MCR_TCRTLR); serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); up->efr = serial_in(up, UART_EFR); serial_out(up, UART_EFR, up->efr | UART_EFR_ECB); serial_out(up, UART_TI752_TCR, OMAP_UART_TCR_TRIG); serial_out(up, UART_EFR, efr); /* Enable AUTORTS and AUTOCTS */ serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A); serial_out(up, UART_MCR, up->mcr | UART_MCR_RTS); serial_out(up, UART_LCR, cval); } serial_omap_set_mctrl(&up->port, up->port.mctrl); /* Software Flow Control Configuration */ serial_omap_configure_xonxoff(up, termios); spin_unlock_irqrestore(&up->port.lock, flags); pm_runtime_put(&up->pdev->dev); dev_dbg(up->port.dev, "serial_omap_set_termios+%d\n", up->port.line); }
static void serial_omap_set_termios(MY_DEV *up, unsigned int request) { int val; unsigned char cval = 0; unsigned int baud, quot; rtdm_lockctx_t context1; int err; printk("serial_omap_set_termios\n"); printk("Local struct up=%x\n",up); printk("request=%x\n",request); val=request & 0x03; printk("val=%x",val); switch(val) { case CS5_1: printk("CS5\n"); cval = UART_LCR_WLEN5; break; case CS6_1: printk("CS6\n"); cval = UART_LCR_WLEN6; break; case CS7_1: printk("CS7\n"); cval = UART_LCR_WLEN7; break; default: case CS8_1: printk("CS8\n"); cval = UART_LCR_WLEN8; break; } if(request & 0x04) { printk("set two stop bits\n"); cval |= UART_LCR_STOP; } if(request & 0x08) { printk("set even patity\n"); cval |= UART_LCR_PARITY; } if(request & 0x10) { printk("set odd parity\n"); cval |= UART_LCR_EPAR; } val=request & 0x60; val = val >> 5; switch(val) { case BAUD_4800: printk("BAUD_4800\n"); baud = 4800; break; case BAUD_9600: printk("BAUD_9600\n"); baud = 9600; break; case BAUD_115200: printk("BAUD_115200\n"); baud = 115200; default: printk("default\n"); baud = 9600; } // baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/13); quot = serial_omap_get_divisor(up, baud);//for getting dll and dlh register value printk("serial_omap_get_divisor=%d\n",quot); up->calc_latency = (USEC_PER_SEC * up->fifosize) / (baud / 8); up->latency = up->calc_latency; up->dll = quot & 0xff; up->dlh = quot >> 8; up->mdr1 = UART_OMAP_MDR1_DISABLE; up->fcr = UART_FCR_R_TRIG_01 | UART_FCR_T_TRIG_01 | UART_FCR_ENABLE_FIFO; err = rtdm_irq_disable(&up->irq_handle); if(err<0) rtdm_printk("error in rtdm_irq_enable\n"); rtdm_lock_get_irqsave(&up->lock,context1); up->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR; // if (termios->c_iflag & INPCK) // up->port.read_status_mask |= UART_LSR_FE | UART_LSR_PE; //Frame error indicator, Parity error indicator // // if (termios->c_iflag & (BRKINT | PARMRK)) // up->port.read_status_mask |= UART_LSR_BI; //Break interrupt indicator up->ignore_status_mask = 0; //this should be passed from user space // if (termios->c_iflag & IGNBRK) // IGNBRK Ignore BREAK condition on input. // { printk("Ignore Break condition on input\n"); up->ignore_status_mask |= UART_LSR_BI; // } up->ier &= ~UART_IER_MSI; serial_out(up, UART_IER, up->ier); printk("Enable interrupt\n"); serial_out(up, UART_LCR, cval); //writing the setting to Line control register /* reset DLAB */ up->lcr = cval; //saving the setting of line control register up->scr = OMAP_UART_SCR_TX_EMPTY; serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A); serial_out(up, UART_DLL, 0); serial_out(up, UART_DLM, 0); serial_out(up, UART_LCR, 0); //*********************************************************************** serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); //config to mode B up->efr = serial_in(up, UART_EFR) & ~UART_EFR_ECB;//value of efr register without enhance function write enable bit up->efr &= ~UART_EFR_SCD; //remove special character detect enable serial_out(up, UART_EFR, up->efr | UART_EFR_ECB); //writing to EFR register with enhance function write enable bit //************************************************************************************ serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A); //config to mode A up->mcr = serial_in(up, UART_MCR) & ~UART_MCR_TCRTLR; //value to TCRTLR=0(No action) if 1 then we can enable TCR and TLR serial_out(up, UART_MCR, up->mcr | UART_MCR_TCRTLR); //writing value to the MCR with TCRTLR enable /* FIFO ENABLE, DMA MODE */ up->scr |= OMAP_UART_SCR_RX_TRIG_GRANU1_MASK; //enable the granularity of 1 for trigger RX level //******************************************************************* /* Set receive FIFO threshold to 16 characters and * transmit FIFO threshold to 16 spaces */ up->fcr &= ~OMAP_UART_FCR_RX_FIFO_TRIG_MASK; // dont set RX_FIFO_TRIG to 60 character up->fcr &= ~OMAP_UART_FCR_TX_FIFO_TRIG_MASK; //dont set TX_FIFO_TRIG to 56 character up->fcr |= UART_FCR6_R_TRIGGER_16 | UART_FCR6_T_TRIGGER_24 | UART_FCR_ENABLE_FIFO; //Rx fifo trigger at 16 character | Tx fifo trigger at 32 char | FIFO_EN serial_out(up, UART_FCR, up->fcr); //write to FCR //******************************************************************** serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); //config to mode B serial_out(up, UART_OMAP_SCR, up->scr); //writing to SCR(supplementary control register) //******************************************************************* /* Reset UART_MCR_TCRTLR: this must be done with the EFR_ECB bit set */ serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A); //config mode A serial_out(up, UART_MCR, up->mcr); //writing to MCR without TCRTLR //******************************************************************* serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); //config mode B serial_out(up, UART_EFR, up->efr); //writing to EFR register without special character detect enable //******************************************************************* serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A); //config mode A /* Protocol, Baud Rate, and Interrupt Settings */ if (up->errata & UART_ERRATA_i202_MDR1_ACCESS) // serial_omap_mdr1_errataset(up, up->mdr1); else serial_out(up, UART_OMAP_MDR1, up->mdr1); //******************************************************************** serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); //config mode B serial_out(up, UART_EFR, up->efr | UART_EFR_ECB); //writing to EFR register with special character serial_out(up, UART_LCR, 0); //writing line control register serial_out(up, UART_IER, 0); //writing to IER //******************************************************************** serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); serial_out(up, UART_DLL, up->dll); /* LS of divisor */ serial_out(up, UART_DLM, up->dlh); /* MS of divisor */ serial_out(up, UART_LCR, 0); serial_out(up, UART_IER, up->ier); //******************************************************************** serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); serial_out(up, UART_EFR, up->efr); serial_out(up, UART_LCR, cval); if (baud > 230400 && baud != 3000000) { printk("baud > 230400\n"); up->mdr1 = UART_OMAP_MDR1_13X_MODE; } else { printk("baud < 230400\n"); up->mdr1 = UART_OMAP_MDR1_16X_MODE; } if (up->errata & UART_ERRATA_i202_MDR1_ACCESS) { printk("up->errata condition true\n"); serial_omap_mdr1_errataset(up, up->mdr1); } else { printk("up->errata condition false\n"); serial_out(up, UART_OMAP_MDR1, up->mdr1); } //*********************************************************************** /* Configure flow control */ serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); /* XON1/XOFF1 accessible mode B, TCRTLR=0, ECB=0 */ // serial_out(up, UART_XON1, termios->c_cc[VSTART]); // serial_out(up, UART_XOFF1, termios->c_cc[VSTOP]); /* Enable access to TCR/TLR */ serial_out(up, UART_EFR, up->efr | UART_EFR_ECB); serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A); serial_out(up, UART_MCR, up->mcr | UART_MCR_TCRTLR); serial_out(up, UART_TI752_TCR, OMAP_UART_TCR_TRIG);//TCR trasmission control register value 0xFF //no hardware control up->efr &= ~(UART_EFR_CTS | UART_EFR_RTS); serial_out(up, UART_MCR, up->mcr); //write to MCR printk("write to UART_MCR\n"); serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); //write to LCR for switching to config mode B printk("Switch to config mode B\n"); serial_out(up, UART_EFR, up->efr); //write to EFR printk("write to EFR register\n"); serial_out(up, UART_LCR, up->lcr); //write to LCR printk("write to LCR\n"); rtdm_lock_put_irqrestore(&up->lock,context1); err = rtdm_irq_enable(&up->irq_handle); if(err<0) rtdm_printk("error in rtdm_irq_enable\n"); printk("serial_omap_set_termios end\n"); }