static void serial_omap_stop_tx(struct uart_port *port) { struct uart_omap_port *up = (struct uart_omap_port *)port; if (up->use_dma && up->uart_dma.tx_dma_channel != OMAP_UART_DMA_CH_FREE) { /* * Check if dma is still active. If yes do nothing, * return. Else stop dma */ if (omap_get_dma_active_status(up->uart_dma.tx_dma_channel)) return; omap_stop_dma(up->uart_dma.tx_dma_channel); omap_free_dma(up->uart_dma.tx_dma_channel); up->uart_dma.tx_dma_channel = OMAP_UART_DMA_CH_FREE; } if (up->ier & UART_IER_THRI) { up->ier &= ~UART_IER_THRI; serial_out(up, UART_IER, up->ier); } }
void NS16550_init(NS16550_t com_port, int baud_divisor) { #if (defined(CONFIG_SPL_BUILD) && \ (defined(CONFIG_OMAP34XX) || defined(CONFIG_OMAP44XX))) /* * On some OMAP3/OMAP4 devices when UART3 is configured for boot mode * before SPL starts only THRE bit is set. We have to empty the * transmitter before initialization starts. */ if ((serial_in(&com_port->lsr) & (UART_LSR_TEMT | UART_LSR_THRE)) == UART_LSR_THRE) { if (baud_divisor != -1) NS16550_setbrg(com_port, baud_divisor); serial_out(0, &com_port->mdr1); } #endif while (!(serial_in(&com_port->lsr) & UART_LSR_TEMT)) ; serial_out(CONFIG_SYS_NS16550_IER, &com_port->ier); #if defined(CONFIG_OMAP) || defined(CONFIG_AM33XX) || \ defined(CONFIG_TI81XX) || defined(CONFIG_AM43XX) serial_out(0x7, &com_port->mdr1); /* mode select reset TL16C750*/ #endif NS16550_setbrg(com_port, 0); serial_out(UART_MCRVAL, &com_port->mcr); serial_out(UART_FCRVAL, &com_port->fcr); if (baud_divisor != -1) NS16550_setbrg(com_port, baud_divisor); #if defined(CONFIG_OMAP) || \ defined(CONFIG_AM33XX) || defined(CONFIG_SOC_DA8XX) || \ defined(CONFIG_TI81XX) || defined(CONFIG_AM43XX) /* /16 is proper to hit 115200 with 48MHz */ serial_out(0, &com_port->mdr1); #endif /* CONFIG_OMAP */ #if defined(CONFIG_SOC_KEYSTONE) serial_out(UART_REG_VAL_PWREMU_MGMT_UART_ENABLE, &com_port->regC); #endif }
static void sw_uart_force_lcr(struct sw_uart_port *sw_uport, unsigned msecs) { unsigned long expire = jiffies + msecs_to_jiffies(msecs); struct uart_port *port = &sw_uport->port; serial_out(port, SW_UART_HALT_FORCECFG, SW_UART_HALT); serial_out(port, sw_uport->dll, SW_UART_DLL); serial_out(port, sw_uport->dlh, SW_UART_DLH); serial_out(port, sw_uport->lcr, SW_UART_LCR); serial_out(port, SW_UART_HALT_FORCECFG|SW_UART_HALT_LCRUP, SW_UART_HALT); while (time_before(jiffies, expire) && (serial_in(port, SW_UART_HALT) & SW_UART_HALT_LCRUP)); /* do not call printk here, yemao 2013-5-20 15:00:38 if (serial_in(port, SW_UART_HALT) & SW_UART_HALT_LCRUP) SERIAL_MSG("uart%d, Force LCR failed\n", sw_uport->id); */ serial_out(port, 0, SW_UART_HALT); }
//static void serial_omap_set_mctrl(struct uart_port *port, unsigned int mctrl) void serial_omap_set_mctrl(struct uart_port *port, unsigned int mctrl) { struct uart_omap_port *up = (struct uart_omap_port *)port; unsigned char mcr = 0; dev_dbg(up->port.dev, "serial_omap_set_mctrl+%d\n", up->pdev->id); if (mctrl & TIOCM_RTS) mcr |= UART_MCR_RTS; if (mctrl & TIOCM_DTR) mcr |= UART_MCR_DTR; if (mctrl & TIOCM_OUT1) mcr |= UART_MCR_OUT1; if (mctrl & TIOCM_OUT2) mcr |= UART_MCR_OUT2; if (mctrl & TIOCM_LOOP) mcr |= UART_MCR_LOOP; serial_omap_port_enable(up); up->mcr = serial_in(up, UART_MCR); up->mcr |= mcr; serial_out(up, UART_MCR, up->mcr); serial_omap_port_disable(up); }
static void serial_omap_set_mctrl(struct uart_port *port, unsigned int mctrl) { struct uart_omap_port *up = (struct uart_omap_port *)port; unsigned char mcr = 0; dev_dbg(up->port.dev, "serial_omap_set_mctrl+%d\n", up->port.line); if (mctrl & TIOCM_RTS) mcr |= UART_MCR_RTS; if (mctrl & TIOCM_DTR) mcr |= UART_MCR_DTR; if (mctrl & TIOCM_OUT1) mcr |= UART_MCR_OUT1; if (mctrl & TIOCM_OUT2) mcr |= UART_MCR_OUT2; if (mctrl & TIOCM_LOOP) mcr |= UART_MCR_LOOP; pm_runtime_get_sync(&up->pdev->dev); up->mcr = serial_in(up, UART_MCR); up->mcr |= mcr; serial_out(up, UART_MCR, up->mcr); pm_runtime_put(&up->pdev->dev); }
static irqreturn_t pnx8xxx_int(int irq, void *dev_id) { struct pnx8xxx_port *sport = dev_id; unsigned int status; spin_lock(&sport->port.lock); status = serial_in(sport, PNX8XXX_ISTAT) & serial_in(sport, PNX8XXX_IEN); if (status & (PNX8XXX_UART_INT_RX | PNX8XXX_UART_INT_BREAK)) pnx8xxx_rx_chars(sport); if (status & PNX8XXX_UART_INT_TX) pnx8xxx_tx_chars(sport); serial_out(sport, PNX8XXX_ICLR, status); spin_unlock(&sport->port.lock); return IRQ_HANDLED; }
static irqreturn_t pnx8xxx_int(int irq, void *dev_id) { struct pnx8xxx_port *sport = dev_id; unsigned int status; spin_lock(&sport->port.lock); /* Get the interrupts */ status = serial_in(sport, PNX8XXX_ISTAT) & serial_in(sport, PNX8XXX_IEN); /* Byte or break signal received */ if (status & (PNX8XXX_UART_INT_RX | PNX8XXX_UART_INT_BREAK)) pnx8xxx_rx_chars(sport); /* TX holding register empty - transmit a byte */ if (status & PNX8XXX_UART_INT_TX) pnx8xxx_tx_chars(sport); /* Clear the ISTAT register */ serial_out(sport, PNX8XXX_ICLR, status); spin_unlock(&sport->port.lock); return IRQ_HANDLED; }
static void serial_omap_rx_timeout(unsigned long uart_no) { struct uart_omap_port *up = ui[uart_no - 1]; unsigned int curr_dma_pos; curr_dma_pos = omap_readl(OMAP34XX_DMA4_BASE + OMAP_DMA4_CDAC(up->uart_dma.rx_dma_channel)); if ((curr_dma_pos == up->uart_dma.prev_rx_dma_pos) || (curr_dma_pos == 0)) { /* * If there is no transfer rx happening for 10sec then stop the dma * else just restart the timer. See if 10 sec can be improved. */ if (jiffies_to_msecs(jiffies - isr8250_activity) < 10000) mod_timer(&up->uart_dma.rx_timer, jiffies + usecs_to_jiffies(up->uart_dma.rx_timeout)); else { del_timer(&up->uart_dma.rx_timer); serial_omap_stop_rxdma(up); up->ier |= UART_IER_RDI; serial_out(up, UART_IER, up->ier); } return; } else { unsigned int curr_transmitted_size = curr_dma_pos - up->uart_dma.prev_rx_dma_pos; up->port.icount.rx += curr_transmitted_size; tty_insert_flip_string(up->port.info->port.tty, up->uart_dma.rx_buf + (up->uart_dma.prev_rx_dma_pos - up->uart_dma.rx_buf_dma_phys), curr_transmitted_size); tty_flip_buffer_push(up->port.info->port.tty); up->uart_dma.prev_rx_dma_pos = curr_dma_pos; if (up->uart_dma.rx_buf_size + up->uart_dma.rx_buf_dma_phys == curr_dma_pos) { serial_omap_start_rxdma(up); } else mod_timer(&up->uart_dma.rx_timer, jiffies + usecs_to_jiffies(up->uart_dma.rx_timeout)); isr8250_activity = jiffies; } }
static void serial_omap_start_rxdma(struct uart_omap_port *up) { #ifdef CONFIG_OMAP3_PM /* Disallow OCP bus idle. UART TX irqs are not seen during * bus idle. Alternative is to set kernel timer at fifo * drain rate. */ unsigned int tmp; tmp = (serial_in(up, UART_OMAP_SYSC) & 0x7) | (1 << 3); serial_out(up, UART_OMAP_SYSC, tmp); /* no-idle */ #endif if (up->uart_dma.rx_dma_channel == 0xFF) omap_request_dma(uart_dma_rx[up->pdev->id-1], "UART Rx DMA", (void *)uart_rx_dma_callback, up, &(up->uart_dma.rx_dma_channel)); omap_set_dma_src_params(up->uart_dma.rx_dma_channel, 0, OMAP_DMA_AMODE_CONSTANT, UART_BASE(up->pdev->id - 1), 0, 0); omap_set_dma_dest_params(up->uart_dma.rx_dma_channel, 0, OMAP_DMA_AMODE_POST_INC, up->uart_dma.rx_buf_dma_phys, 0, 0); omap_set_dma_transfer_params(up->uart_dma.rx_dma_channel, OMAP_DMA_DATA_TYPE_S8, up->uart_dma.rx_buf_size, 1, OMAP_DMA_SYNC_ELEMENT, uart_dma_rx[up->pdev->id-1], 0); up->uart_dma.prev_rx_dma_pos = up->uart_dma.rx_buf_dma_phys; omap_writel(0, OMAP34XX_DMA4_BASE + OMAP_DMA4_CDAC(up->uart_dma.rx_dma_channel)); omap_start_dma(up->uart_dma.rx_dma_channel); mod_timer(&up->uart_dma.rx_timer, jiffies + usecs_to_jiffies(up->uart_dma.rx_timeout)); up->uart_dma.rx_dma_state = 1; }
DEBUG_UART_FUNCS #endif #ifdef CONFIG_DM_SERIAL static int ns16550_serial_putc(struct udevice *dev, const char ch) { struct NS16550 *const com_port = dev_get_priv(dev); if (!(serial_in(&com_port->lsr) & UART_LSR_THRE)) return -EAGAIN; serial_out(ch, &com_port->thr); /* * Call watchdog_reset() upon newline. This is done here in putc * since the environment code uses a single puts() to print the complete * environment upon "printenv". So we can't put this watchdog call * in puts(). */ if (ch == '\n') WATCHDOG_RESET(); return 0; }
static void serial_omap_set_mctrl(struct uart_port *port, unsigned int mctrl) { struct uart_omap_port *up = to_uart_omap_port(port); unsigned char mcr = 0, old_mcr; dev_dbg(up->port.dev, "serial_omap_set_mctrl+%d\n", up->port.line); if (mctrl & TIOCM_RTS) mcr |= UART_MCR_RTS; if (mctrl & TIOCM_DTR) mcr |= UART_MCR_DTR; if (mctrl & TIOCM_OUT1) mcr |= UART_MCR_OUT1; if (mctrl & TIOCM_OUT2) mcr |= UART_MCR_OUT2; if (mctrl & TIOCM_LOOP) mcr |= UART_MCR_LOOP; pm_runtime_get_sync(up->dev); old_mcr = serial_in(up, UART_MCR); old_mcr &= ~(UART_MCR_LOOP | UART_MCR_OUT2 | UART_MCR_OUT1 | UART_MCR_DTR | UART_MCR_RTS); up->mcr = old_mcr | mcr; serial_out(up, UART_MCR, up->mcr); pm_runtime_mark_last_busy(up->dev); pm_runtime_put_autosuspend(up->dev); if (gpio_is_valid(up->DTR_gpio) && !!(mctrl & TIOCM_DTR) != up->DTR_active) { up->DTR_active = !up->DTR_active; if (gpio_cansleep(up->DTR_gpio)) schedule_work(&up->qos_work); else gpio_set_value(up->DTR_gpio, up->DTR_active != up->DTR_inverted); } }
/* * This handles the interrupt from one port. */ static inline irqreturn_t serial_omap_irq(int irq, void *dev_id) { struct uart_omap_port *up = dev_id; unsigned int iir, lsr; iir = serial_in(up, UART_IIR); if (iir & UART_IIR_NO_INT) return IRQ_NONE; lsr = serial_in(up, UART_LSR); if ((iir & 0x4) && up->use_dma) { up->ier &= ~UART_IER_RDI; serial_out(up, UART_IER, up->ier); serial_omap_start_rxdma(up); } else if (lsr & UART_LSR_DR) receive_chars(up, &lsr); check_modem_status(up); if ((lsr & UART_LSR_THRE) && (iir & 0x2)) transmit_chars(up); #ifdef CONFIG_OMAP3_PM isr8250_activity = jiffies; #endif return IRQ_HANDLED; }
static void serial_omap_pm(struct uart_port *port, unsigned int state, unsigned int oldstate) { struct uart_omap_port *up = to_uart_omap_port(port); unsigned char efr; dev_dbg(up->port.dev, "serial_omap_pm+%d\n", up->port.line); pm_runtime_get_sync(up->dev); serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); efr = serial_in(up, UART_EFR); serial_out(up, UART_EFR, efr | UART_EFR_ECB); serial_out(up, UART_LCR, 0); serial_out(up, UART_IER, (state != 0) ? UART_IERX_SLEEP : 0); serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); serial_out(up, UART_EFR, efr); serial_out(up, UART_LCR, 0); pm_runtime_mark_last_busy(up->dev); pm_runtime_put_autosuspend(up->dev); }
static void serial_omap_poll_put_char(struct uart_port *port, unsigned char ch) { struct uart_omap_port *up = (struct uart_omap_port *)port; wait_for_xmitr(up); serial_out(up, UART_TX, ch); }
static inline void serial_omap_configure_xonxoff (struct uart_omap_port *up, struct ktermios *termios) { unsigned char efr = 0; up->lcr = serial_in(up, UART_LCR); 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_XON1, termios->c_cc[VSTART]); serial_out(up, UART_XOFF1, termios->c_cc[VSTOP]); /* clear SW control mode bits */ efr = up->efr; efr &= OMAP_UART_SW_CLR; /* * IXON Flag: * Enable XON/XOFF flow control on output. * Transmit XON1, XOFF1 */ if (termios->c_iflag & IXON) efr |= OMAP_UART_SW_TX; /* * IXOFF Flag: * Enable XON/XOFF flow control on input. * Receiver compares XON1, XOFF1. */ if (termios->c_iflag & IXOFF) efr |= OMAP_UART_SW_RX; 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); /* * 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; serial_out(up, UART_MCR, up->mcr | UART_MCR_TCRTLR); serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); serial_out(up, UART_TI752_TCR, OMAP_UART_TCR_TRIG); /* Enable special char function UARTi.EFR_REG[5] and * load the new software flow control mode IXON or IXOFF * and restore the UARTi.EFR_REG[4] ENHANCED_EN value. */ serial_out(up, UART_EFR, efr | UART_EFR_SCD); serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A); serial_out(up, UART_MCR, up->mcr & ~UART_MCR_TCRTLR); serial_out(up, UART_LCR, up->lcr); }
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_hsu_set_termios(struct uart_port *port, struct ktermios *termios, struct ktermios *old) { struct uart_hsu_port *up = container_of(port, struct uart_hsu_port, port); struct tty_struct *tty = port->state->port.tty; unsigned char cval, fcr = 0; unsigned long flags; unsigned int baud, quot; u32 ps, mul; 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; } /* CMSPAR isn't supported by this driver */ if (tty) tty->termios->c_cflag &= ~CMSPAR; 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; /* * The base clk is 50Mhz, and the baud rate come from: * baud = 50M * MUL / (DIV * PS * DLAB) * * For those basic low baud rate we can get the direct * scalar from 2746800, like 115200 = 2746800/24. For those * higher baud rate, we handle them case by case, mainly by * adjusting the MUL/PS registers, and DIV register is kept * as default value 0x3d09 to make things simple */ baud = uart_get_baud_rate(port, termios, old, 0, 4000000); quot = 1; ps = 0x10; mul = 0x3600; switch (baud) { case 3500000: mul = 0x3345; ps = 0xC; break; case 1843200: mul = 0x2400; break; case 3000000: case 2500000: case 2000000: case 1500000: case 1000000: case 500000: /* mul/ps/quot = 0x9C4/0x10/0x1 will make a 500000 bps */ mul = baud / 500000 * 0x9C4; break; default: /* Use uart_get_divisor to get quot for other baud rates */ quot = 0; } if (!quot) quot = uart_get_divisor(port, baud); if ((up->port.uartclk / quot) < (2400 * 16)) fcr = UART_FCR_ENABLE_FIFO | UART_FCR_HSU_64_1B; else if ((up->port.uartclk / quot) < (230400 * 16)) fcr = UART_FCR_ENABLE_FIFO | UART_FCR_HSU_64_16B; else fcr = UART_FCR_ENABLE_FIFO | UART_FCR_HSU_64_32B; fcr |= UART_FCR_HSU_64B_FIFO; #ifdef MFD_HSU_A0_STEPPING /* A0 doesn't support half empty IRQ */ fcr |= UART_FCR_FULL_EMPT_TXI; #endif /* * Ok, we're now changing the port state. Do it with * interrupts disabled. */ 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; /* * CTS flow control flag and modem status interrupts, disable * MSI by default */ 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); if (termios->c_cflag & CRTSCTS) up->mcr |= UART_MCR_AFE | UART_MCR_RTS; else up->mcr &= ~UART_MCR_AFE; serial_out(up, UART_LCR, cval | UART_LCR_DLAB); /* set DLAB */ serial_out(up, UART_DLL, quot & 0xff); /* LS of divisor */ serial_out(up, UART_DLM, quot >> 8); /* MS of divisor */ serial_out(up, UART_LCR, cval); /* reset DLAB */ serial_out(up, UART_MUL, mul); /* set MUL */ serial_out(up, UART_PS, ps); /* set PS */ up->lcr = cval; /* Save LCR */ serial_hsu_set_mctrl(&up->port, up->port.mctrl); serial_out(up, UART_FCR, fcr); spin_unlock_irqrestore(&up->port.lock, flags); }
static void serial_pxa_set_termios(struct uart_port *port, struct ktermios *termios, struct ktermios *old) { struct uart_pxa_port *up = (struct uart_pxa_port *)port; unsigned char cval, fcr = 0; unsigned long flags; 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/16); quot = uart_get_divisor(port, baud); if ((up->port.uartclk / quot) < (2400 * 16)) fcr = UART_FCR_ENABLE_FIFO | UART_FCR_PXAR1; else if ((up->port.uartclk / quot) < (230400 * 16)) fcr = UART_FCR_ENABLE_FIFO | UART_FCR_PXAR8; else fcr = UART_FCR_ENABLE_FIFO | UART_FCR_PXAR32; /* * Ok, we're now changing the port state. Do it with * interrupts disabled. */ spin_lock_irqsave(&up->port.lock, flags); /* * Ensure the port will be enabled. * This is required especially for serial console. */ up->ier |= IER_UUE; /* * 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; /* * CTS flow control flag and 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 | UART_LCR_DLAB);/* set DLAB */ serial_out(up, UART_DLL, quot & 0xff); /* LS of divisor */ serial_out(up, UART_DLM, quot >> 8); /* MS of divisor */ serial_out(up, UART_LCR, cval); /* reset DLAB */ up->lcr = cval; /* Save LCR */ serial_pxa_set_mctrl(&up->port, up->port.mctrl); serial_out(up, UART_FCR, fcr); spin_unlock_irqrestore(&up->port.lock, flags); }
/* * What special to do: * 1. chose the 64B fifo mode * 2. make sure not to select half empty mode for A0 stepping * 3. start dma or pio depends on configuration * 4. we only allocate dma memory when needed */ static int serial_hsu_startup(struct uart_port *port) { struct uart_hsu_port *up = container_of(port, struct uart_hsu_port, port); unsigned long flags; /* * Clear the FIFO buffers and disable them. * (they will be reenabled in set_termios()) */ serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO); serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT); serial_out(up, UART_FCR, 0); /* Clear the interrupt registers. */ (void) serial_in(up, UART_LSR); (void) serial_in(up, UART_RX); (void) serial_in(up, UART_IIR); (void) serial_in(up, UART_MSR); /* Now, initialize the UART, default is 8n1 */ serial_out(up, UART_LCR, UART_LCR_WLEN8); spin_lock_irqsave(&up->port.lock, flags); up->port.mctrl |= TIOCM_OUT2; serial_hsu_set_mctrl(&up->port, up->port.mctrl); /* * Finally, enable interrupts. Note: Modem status interrupts * are set via set_termios(), which will be occurring imminently * anyway, so we don't enable them here. */ if (!up->use_dma) up->ier = UART_IER_RLSI | UART_IER_RDI | UART_IER_RTOIE; else up->ier = 0; serial_out(up, UART_IER, up->ier); spin_unlock_irqrestore(&up->port.lock, flags); /* DMA init */ if (up->use_dma) { struct hsu_dma_buffer *dbuf; struct circ_buf *xmit = &port->state->xmit; up->dma_tx_on = 0; /* First allocate the RX buffer */ dbuf = &up->rxbuf; dbuf->buf = kzalloc(HSU_DMA_BUF_SIZE, GFP_KERNEL); if (!dbuf->buf) { up->use_dma = 0; goto exit; } dbuf->dma_addr = dma_map_single(port->dev, dbuf->buf, HSU_DMA_BUF_SIZE, DMA_FROM_DEVICE); dbuf->dma_size = HSU_DMA_BUF_SIZE; /* Start the RX channel right now */ hsu_dma_start_rx_chan(up->rxc, dbuf); /* Next init the TX DMA */ dbuf = &up->txbuf; dbuf->buf = xmit->buf; dbuf->dma_addr = dma_map_single(port->dev, dbuf->buf, UART_XMIT_SIZE, DMA_TO_DEVICE); dbuf->dma_size = UART_XMIT_SIZE; /* This should not be changed all around */ chan_writel(up->txc, HSU_CH_BSR, 32); chan_writel(up->txc, HSU_CH_MOTSR, 4); dbuf->ofs = 0; } exit: /* And clear the interrupt registers again for luck. */ (void) serial_in(up, UART_LSR); (void) serial_in(up, UART_RX); (void) serial_in(up, UART_IIR); (void) serial_in(up, UART_MSR); up->running = 1; return 0; }
static void serial_omap_stop_tx(struct uart_port *port) { struct uart_omap_port *up = to_uart_omap_port(port); int res; pm_runtime_get_sync(up->dev); /* Handle RS-485 */ if (port->rs485.flags & SER_RS485_ENABLED) { if (up->scr & OMAP_UART_SCR_TX_EMPTY) { /* THR interrupt is fired when both TX FIFO and TX * shift register are empty. This means there's nothing * left to transmit now, so make sure the THR interrupt * is fired when TX FIFO is below the trigger level, * disable THR interrupts and toggle the RS-485 GPIO * data direction pin if needed. */ up->scr &= ~OMAP_UART_SCR_TX_EMPTY; serial_out(up, UART_OMAP_SCR, up->scr); res = (port->rs485.flags & SER_RS485_RTS_AFTER_SEND) ? 1 : 0; if (gpio_get_value(up->rts_gpio) != res) { if (port->rs485.delay_rts_after_send > 0) mdelay( port->rs485.delay_rts_after_send); gpio_set_value(up->rts_gpio, res); } } else { /* We're asked to stop, but there's still stuff in the * UART FIFO, so make sure the THR interrupt is fired * when both TX FIFO and TX shift register are empty. * The next THR interrupt (if no transmission is started * in the meantime) will indicate the end of a * transmission. Therefore we _don't_ disable THR * interrupts in this situation. */ up->scr |= OMAP_UART_SCR_TX_EMPTY; serial_out(up, UART_OMAP_SCR, up->scr); return; } } if (up->ier & UART_IER_THRI) { up->ier &= ~UART_IER_THRI; serial_out(up, UART_IER, up->ier); } if ((port->rs485.flags & SER_RS485_ENABLED) && !(port->rs485.flags & SER_RS485_RX_DURING_TX)) { /* * Empty the RX FIFO, we are not interested in anything * received during the half-duplex transmission. */ serial_out(up, UART_FCR, up->fcr | UART_FCR_CLEAR_RCVR); /* Re-enable RX interrupts */ up->ier |= UART_IER_RLSI | UART_IER_RDI; up->port.read_status_mask |= UART_LSR_DR; serial_out(up, UART_IER, up->ier); } pm_runtime_mark_last_busy(up->dev); pm_runtime_put_autosuspend(up->dev); }
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 int serial_omap_startup(struct uart_port *port) { struct uart_omap_port *up = to_uart_omap_port(port); unsigned long flags = 0; int retval; /* * Allocate the IRQ */ retval = request_irq(up->port.irq, serial_omap_irq, up->port.irqflags, up->name, up); if (retval) return retval; /* Optional wake-up IRQ */ if (up->wakeirq) { retval = dev_pm_set_dedicated_wake_irq(up->dev, up->wakeirq); if (retval) { free_irq(up->port.irq, up); return retval; } } dev_dbg(up->port.dev, "serial_omap_startup+%d\n", up->port.line); pm_runtime_get_sync(up->dev); /* * Clear the FIFO buffers and disable them. * (they will be reenabled in set_termios()) */ serial_omap_clear_fifos(up); /* * Clear the interrupt registers. */ (void) serial_in(up, UART_LSR); if (serial_in(up, UART_LSR) & UART_LSR_DR) (void) serial_in(up, UART_RX); (void) serial_in(up, UART_IIR); (void) serial_in(up, UART_MSR); /* * Now, initialize the UART */ serial_out(up, UART_LCR, UART_LCR_WLEN8); spin_lock_irqsave(&up->port.lock, flags); /* * Most PC uarts need OUT2 raised to enable interrupts. */ up->port.mctrl |= TIOCM_OUT2; serial_omap_set_mctrl(&up->port, up->port.mctrl); spin_unlock_irqrestore(&up->port.lock, flags); up->msr_saved_flags = 0; /* * Finally, enable interrupts. Note: Modem status interrupts * are set via set_termios(), which will be occurring imminently * anyway, so we don't enable them here. */ up->ier = UART_IER_RLSI | UART_IER_RDI; serial_out(up, UART_IER, up->ier); /* Enable module level wake up */ up->wer = OMAP_UART_WER_MOD_WKUP; if (up->features & OMAP_UART_WER_HAS_TX_WAKEUP) up->wer |= OMAP_UART_TX_WAKEUP_EN; serial_out(up, UART_OMAP_WER, up->wer); pm_runtime_mark_last_busy(up->dev); pm_runtime_put_autosuspend(up->dev); up->port_activity = jiffies; return 0; }
static inline void serial_omap_configure_xonxoff (struct uart_omap_port *up, struct ktermios *termios) { up->lcr = serial_in(up, UART_LCR); 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_XON1, termios->c_cc[VSTART]); serial_out(up, UART_XOFF1, termios->c_cc[VSTOP]); up->efr &= OMAP_UART_SW_CLR; /* * IXON Flag: * Enable XON/XOFF flow control on output. * Transmit XON1, XOFF1 */ if (termios->c_iflag & IXON) up->efr |= OMAP_UART_SW_TX; /* * IXOFF Flag: * Enable XON/XOFF flow control on input. * Receiver compares XON1, XOFF1. */ if (termios->c_iflag & IXOFF) up->efr |= OMAP_UART_SW_RX; 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); if (termios->c_iflag & IXANY) up->mcr |= UART_MCR_XONANY; serial_out(up, UART_MCR, up->mcr | UART_MCR_TCRTLR); serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); serial_out(up, UART_TI752_TCR, OMAP_UART_TCR_TRIG); serial_out(up, UART_EFR, up->efr | UART_EFR_SCD); serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A); serial_out(up, UART_MCR, up->mcr & ~UART_MCR_TCRTLR); serial_out(up, UART_LCR, up->lcr); }
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 int serial_omap_startup(struct uart_port *port) { struct uart_omap_port *up = (struct uart_omap_port *)port; unsigned long flags = 0; int retval; /* * Allocate the IRQ */ retval = request_irq(up->port.irq, serial_omap_irq, up->port.irqflags, up->name, up); if (retval) return retval; dev_dbg(up->port.dev, "serial_omap_startup+%d\n", up->pdev->id); /* * Clear the FIFO buffers and disable them. * (they will be reenabled in set_termios()) */ serial_omap_clear_fifos(up); /* For Hardware flow control */ serial_out(up, UART_MCR, UART_MCR_RTS); /* * Clear the interrupt registers. */ (void) serial_in(up, UART_LSR); if (serial_in(up, UART_LSR) & UART_LSR_DR) (void) serial_in(up, UART_RX); (void) serial_in(up, UART_IIR); (void) serial_in(up, UART_MSR); /* * Now, initialize the UART */ serial_out(up, UART_LCR, UART_LCR_WLEN8); spin_lock_irqsave(&up->port.lock, flags); /* * Most PC uarts need OUT2 raised to enable interrupts. */ up->port.mctrl |= TIOCM_OUT2; serial_omap_set_mctrl(&up->port, up->port.mctrl); spin_unlock_irqrestore(&up->port.lock, flags); up->msr_saved_flags = 0; if (up->use_dma) { free_page((unsigned long)up->port.state->xmit.buf); up->port.state->xmit.buf = dma_alloc_coherent(NULL, UART_XMIT_SIZE, (dma_addr_t *)&(up->uart_dma.tx_buf_dma_phys), 0); init_timer(&(up->uart_dma.rx_timer)); up->uart_dma.rx_timer.function = serial_omap_rx_timeout; up->uart_dma.rx_timer.data = up->pdev->id; /* Currently the buffer size is 4KB. Can increase it */ up->uart_dma.rx_buf = dma_alloc_coherent(NULL, up->uart_dma.rx_buf_size, (dma_addr_t *)&(up->uart_dma.rx_buf_dma_phys), 0); } /* * Finally, enable interrupts. Note: Modem status interrupts * are set via set_termios(), which will be occurring imminently * anyway, so we don't enable them here. */ up->ier = UART_IER_RLSI | UART_IER_RDI; serial_out(up, UART_IER, up->ier); /* Enable module level wake up */ serial_out(up, UART_OMAP_WER, OMAP_UART_WER_MOD_WKUP); up->port_activity = jiffies; return 0; }
static void serial8250_set_termios(struct uart_port *port, struct termios *termios, struct termios *old) { struct uart_8250_port *up = (struct uart_8250_port *)port; unsigned char cval, fcr = 0; unsigned long flags; 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; #ifdef CMSPAR if (termios->c_cflag & CMSPAR) cval |= UART_LCR_SPAR; #endif /* * Ask the core to calculate the divisor for us. */ baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16); quot = serial8250_get_divisor(port, baud); quot = 0x35; /* FIXME */ /* * Work around a bug in the Oxford Semiconductor 952 rev B * chip which causes it to seriously miscalculate baud rates * when DLL is 0. */ if ((quot & 0xff) == 0 && up->port.type == PORT_16C950 && up->rev == 0x5201) quot ++; if (uart_config[up->port.type].flags & UART_USE_FIFO) { if (baud < 2400) fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIGGER_1; else fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIGGER_8; } /* * Ok, we're now changing the port state. Do it with * interrupts disabled. */ 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; /* * Characteres 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; /* * CTS flow control flag and 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_outp(up, 0x28, quot & 0xffff); up->lcr = cval; /* Save LCR */ if (up->port.type != PORT_16750) { if (fcr & UART_FCR_ENABLE_FIFO) { /* emulated UARTs (Lucent Venus 167x) need two steps */ serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO); } serial_outp(up, UART_FCR, fcr); /* set fcr */ } spin_unlock_irqrestore(&up->port.lock, flags); }
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); 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. */ 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 */ /* 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 */ serial_out(up, UART_FCR, up->fcr); serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); if (up->use_dma) { serial_out(up, UART_TI752_TLR, 0); serial_out(up, UART_OMAP_SCR, (UART_FCR_TRIGGER_4 | UART_FCR_TRIGGER_8)); } 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 */ serial_out(up, UART_OMAP_MDR1, UART_OMAP_MDR1_DISABLE); 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, quot & 0xff); /* LS of divisor */ serial_out(up, UART_DLM, quot >> 8); /* 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) serial_out(up, UART_OMAP_MDR1, UART_OMAP_MDR1_13X_MODE); else serial_out(up, UART_OMAP_MDR1, UART_OMAP_MDR1_16X_MODE); /* 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); dev_dbg(up->port.dev, "serial_omap_set_termios+%d\n", up->pdev->id); }
static void serial_omap_console_write(struct console *co, const char *s, unsigned int count) { struct uart_omap_port *up = serial_omap_console_ports[co->index]; unsigned long flags; unsigned int ier; int console_lock = 0, locked = 1; if (console_trylock()) console_lock = 1; /* * If console_lock is not available and we are in suspending * state then we can avoid the console usage scenario * as this may introduce recursive prints. * Basically this scenario occurs during boot while * printing debug bootlogs. */ if (!console_lock && up->pdev->dev.power.runtime_status == RPM_SUSPENDING) return; local_irq_save(flags); if (up->port.sysrq) locked = 0; else if (oops_in_progress) locked = spin_trylock(&up->port.lock); else spin_lock(&up->port.lock); serial_omap_port_enable(up); /* * First save the IER then disable the interrupts */ ier = serial_in(up, UART_IER); serial_out(up, UART_IER, 0); uart_console_write(&up->port, s, count, serial_omap_console_putchar); /* * Finally, wait for transmitter to become empty * and restore the IER */ wait_for_xmitr(up); serial_out(up, UART_IER, ier); /* * The receive handling will happen properly because the * receive ready bit will still be set; it is not cleared * on read. However, modem control will not, we must * call it if we have saved something in the saved flags * while processing with interrupts off. */ if (up->msr_saved_flags) check_modem_status(up); if (console_lock) console_unlock(); serial_omap_port_disable(up); if (locked) spin_unlock(&up->port.lock); local_irq_restore(flags); }
static void __init serial_putc(struct uart_port *port, int c) { wait_for_xmitr(port); serial_out(port, UART_TX, c); }
static void omap_uart_restore_context(struct uart_omap_port *up) { if (up->errata & UART_ERRATA_i202_MDR1_ACCESS) omap_uart_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); /* Config B mode */ serial_out(up, UART_EFR, UART_EFR_ECB); serial_out(up, UART_LCR, 0x0); /* Operational mode */ serial_out(up, UART_IER, 0x0); serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); /* Config B mode */ serial_out(up, UART_DLL, up->dll); serial_out(up, UART_DLM, up->dlh); serial_out(up, UART_LCR, 0x0); /* Operational mode */ 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); /* Config B mode */ serial_out(up, UART_EFR, up->efr); serial_out(up, UART_LCR, up->lcr); /* Enable module level wake up */ serial_out(up, UART_OMAP_WER, up->wer_restore); if (up->use_dma) { if (up->errata & OMAP4_UART_ERRATA_i659_TX_THR) { serial_out(up, UART_MDR3, SET_DMA_TX_THRESHOLD); serial_out(up, UART_TX_DMA_THRESHOLD, TX_FIFO_THR_LVL); } serial_out(up, UART_TI752_TLR, 0); } serial_out(up, UART_OMAP_SCR, up->scr); /* UART 16x mode */ if (up->errata & UART_ERRATA_i202_MDR1_ACCESS) omap_uart_mdr1_errataset(up, up->mdr1); else serial_out(up, UART_OMAP_MDR1, up->mdr1); }