コード例 #1
0
static void scc_shutdown_port(void *ptr)
{
	struct scc_port *port = ptr;

	port->gs.port.flags &= ~ GS_ACTIVE;
	if (port->gs.port.tty && (port->gs.port.tty->termios->c_cflag & HUPCL)) {
		scc_setsignals (port, 0, 0);
	}
}
コード例 #2
0
static int scc_open (struct tty_struct * tty, struct file * filp)
{
	int line = tty->index;
	int retval;
	struct scc_port *port = &scc_ports[line];
	int i, channel = port->channel;
	unsigned long	flags;
	SCC_ACCESS_INIT(port);
#if defined(CONFIG_MVME162_SCC) || defined(CONFIG_MVME147_SCC)
	static const struct {
		unsigned reg, val;
	} mvme_init_tab[] = {
		/* Values for MVME162 and MVME147 */
		/* no parity, 1 stop bit, async, 1:16 */
		{ AUX1_CTRL_REG, A1CR_PARITY_NONE|A1CR_MODE_ASYNC_1|A1CR_CLKMODE_x16 },
		/* parity error is special cond, ints disabled, no DMA */
		{ INT_AND_DMA_REG, IDR_PARERR_AS_SPCOND | IDR_RX_INT_DISAB },
		/* Rx 8 bits/char, no auto enable, Rx off */
		{ RX_CTRL_REG, RCR_CHSIZE_8 },
		/* DTR off, Tx 8 bits/char, RTS off, Tx off */
		{ TX_CTRL_REG, TCR_CHSIZE_8 },
		/* special features off */
		{ AUX2_CTRL_REG, 0 },
		{ CLK_CTRL_REG, CCR_RXCLK_BRG | CCR_TXCLK_BRG },
		{ DPLL_CTRL_REG, DCR_BRG_ENAB | DCR_BRG_USE_PCLK },
		/* Start Rx */
		{ RX_CTRL_REG, RCR_RX_ENAB | RCR_CHSIZE_8 },
		/* Start Tx */
		{ TX_CTRL_REG, TCR_TX_ENAB | TCR_RTS | TCR_DTR | TCR_CHSIZE_8 },
		/* Ext/Stat ints: DCD only */
		{ INT_CTRL_REG, ICR_ENAB_DCD_INT },
		/* Reset Ext/Stat ints */
		{ COMMAND_REG, CR_EXTSTAT_RESET },
		/* ...again */
		{ COMMAND_REG, CR_EXTSTAT_RESET },
	};
#endif
#if defined(CONFIG_BVME6000_SCC)
	static const struct {
		unsigned reg, val;
	} bvme_init_tab[] = {
		/* Values for BVME6000 */
		/* no parity, 1 stop bit, async, 1:16 */
		{ AUX1_CTRL_REG, A1CR_PARITY_NONE|A1CR_MODE_ASYNC_1|A1CR_CLKMODE_x16 },
		/* parity error is special cond, ints disabled, no DMA */
		{ INT_AND_DMA_REG, IDR_PARERR_AS_SPCOND | IDR_RX_INT_DISAB },
		/* Rx 8 bits/char, no auto enable, Rx off */
		{ RX_CTRL_REG, RCR_CHSIZE_8 },
		/* DTR off, Tx 8 bits/char, RTS off, Tx off */
		{ TX_CTRL_REG, TCR_CHSIZE_8 },
		/* special features off */
		{ AUX2_CTRL_REG, 0 },
		{ CLK_CTRL_REG, CCR_RTxC_XTAL | CCR_RXCLK_BRG | CCR_TXCLK_BRG },
		{ DPLL_CTRL_REG, DCR_BRG_ENAB },
		/* Start Rx */
		{ RX_CTRL_REG, RCR_RX_ENAB | RCR_CHSIZE_8 },
		/* Start Tx */
		{ TX_CTRL_REG, TCR_TX_ENAB | TCR_RTS | TCR_DTR | TCR_CHSIZE_8 },
		/* Ext/Stat ints: DCD only */
		{ INT_CTRL_REG, ICR_ENAB_DCD_INT },
		/* Reset Ext/Stat ints */
		{ COMMAND_REG, CR_EXTSTAT_RESET },
		/* ...again */
		{ COMMAND_REG, CR_EXTSTAT_RESET },
	};
#endif
	if (!(port->gs.port.flags & ASYNC_INITIALIZED)) {
		local_irq_save(flags);
#if defined(CONFIG_MVME147_SCC) || defined(CONFIG_MVME162_SCC)
		if (MACH_IS_MVME147 || MACH_IS_MVME16x) {
			for (i = 0; i < ARRAY_SIZE(mvme_init_tab); ++i)
				SCCwrite(mvme_init_tab[i].reg, mvme_init_tab[i].val);
		}
#endif
#if defined(CONFIG_BVME6000_SCC)
		if (MACH_IS_BVME6000) {
			for (i = 0; i < ARRAY_SIZE(bvme_init_tab); ++i)
				SCCwrite(bvme_init_tab[i].reg, bvme_init_tab[i].val);
		}
#endif

		/* remember status register for detection of DCD and CTS changes */
		scc_last_status_reg[channel] = SCCread(STATUS_REG);

		port->c_dcd = 0;	/* Prevent initial 1->0 interrupt */
		scc_setsignals (port, 1,1);
		local_irq_restore(flags);
	}

	tty->driver_data = port;
	port->gs.port.tty = tty;
	port->gs.port.count++;
	retval = gs_init_port(&port->gs);
	if (retval) {
		port->gs.port.count--;
		return retval;
	}
	port->gs.port.flags |= GS_ACTIVE;
	retval = gs_block_til_ready(port, filp);

	if (retval) {
		port->gs.port.count--;
		return retval;
	}

	port->c_dcd = tty_port_carrier_raised(&port->gs.port);

	scc_enable_rx_interrupts(port);

	return 0;
}
コード例 #3
0
static int scc_open (struct tty_struct * tty, struct file * filp)
{
	int line = MINOR(tty->device) - SCC_MINOR_BASE;
	int retval;
	struct scc_port *port = &scc_ports[line];
	int i, channel = port->channel;
	unsigned long	flags;
	SCC_ACCESS_INIT(port);
#if defined(CONFIG_MVME162_SCC) || defined(CONFIG_MVME147_SCC)
	static const struct {
		unsigned reg, val;
	} mvme_init_tab[] = {
		/* Values for MVME162 and MVME147 */
		/* no parity, 1 stop bit, async, 1:16 */
		{ AUX1_CTRL_REG, A1CR_PARITY_NONE|A1CR_MODE_ASYNC_1|A1CR_CLKMODE_x16 },
		/* parity error is special cond, ints disabled, no DMA */
		{ INT_AND_DMA_REG, IDR_PARERR_AS_SPCOND | IDR_RX_INT_DISAB },
		/* Rx 8 bits/char, no auto enable, Rx off */
		{ RX_CTRL_REG, RCR_CHSIZE_8 },
		/* DTR off, Tx 8 bits/char, RTS off, Tx off */
		{ TX_CTRL_REG, TCR_CHSIZE_8 },
		/* special features off */
		{ AUX2_CTRL_REG, 0 },
		{ CLK_CTRL_REG, CCR_RXCLK_BRG | CCR_TXCLK_BRG },
		{ DPLL_CTRL_REG, DCR_BRG_ENAB | DCR_BRG_USE_PCLK },
		/* Start Rx */
		{ RX_CTRL_REG, RCR_RX_ENAB | RCR_CHSIZE_8 },
		/* Start Tx */
		{ TX_CTRL_REG, TCR_TX_ENAB | TCR_RTS | TCR_DTR | TCR_CHSIZE_8 },
		/* Ext/Stat ints: DCD only */
		{ INT_CTRL_REG, ICR_ENAB_DCD_INT },
		/* Reset Ext/Stat ints */
		{ COMMAND_REG, CR_EXTSTAT_RESET },
		/* ...again */
		{ COMMAND_REG, CR_EXTSTAT_RESET },
	};
#endif
#if defined(CONFIG_BVME6000_SCC)
	static const struct {
		unsigned reg, val;
	} bvme_init_tab[] = {
		/* Values for BVME6000 */
		/* no parity, 1 stop bit, async, 1:16 */
		{ AUX1_CTRL_REG, A1CR_PARITY_NONE|A1CR_MODE_ASYNC_1|A1CR_CLKMODE_x16 },
		/* parity error is special cond, ints disabled, no DMA */
		{ INT_AND_DMA_REG, IDR_PARERR_AS_SPCOND | IDR_RX_INT_DISAB },
		/* Rx 8 bits/char, no auto enable, Rx off */
		{ RX_CTRL_REG, RCR_CHSIZE_8 },
		/* DTR off, Tx 8 bits/char, RTS off, Tx off */
		{ TX_CTRL_REG, TCR_CHSIZE_8 },
		/* special features off */
		{ AUX2_CTRL_REG, 0 },
		{ CLK_CTRL_REG, CCR_RTxC_XTAL | CCR_RXCLK_BRG | CCR_TXCLK_BRG },
		{ DPLL_CTRL_REG, DCR_BRG_ENAB },
		/* Start Rx */
		{ RX_CTRL_REG, RCR_RX_ENAB | RCR_CHSIZE_8 },
		/* Start Tx */
		{ TX_CTRL_REG, TCR_TX_ENAB | TCR_RTS | TCR_DTR | TCR_CHSIZE_8 },
		/* Ext/Stat ints: DCD only */
		{ INT_CTRL_REG, ICR_ENAB_DCD_INT },
		/* Reset Ext/Stat ints */
		{ COMMAND_REG, CR_EXTSTAT_RESET },
		/* ...again */
		{ COMMAND_REG, CR_EXTSTAT_RESET },
	};
#endif
	if (!(port->gs.flags & ASYNC_INITIALIZED)) {
		save_flags(flags);
		cli();
#if defined(CONFIG_MVME147_SCC) || defined(CONFIG_MVME162_SCC)
		if (MACH_IS_MVME147 || MACH_IS_MVME16x) {
			for (i=0; i<sizeof(mvme_init_tab)/sizeof(*mvme_init_tab); ++i)
				SCCwrite(mvme_init_tab[i].reg, mvme_init_tab[i].val);
		}
#endif
#if defined(CONFIG_BVME6000_SCC)
		if (MACH_IS_BVME6000) {
			for (i=0; i<sizeof(bvme_init_tab)/sizeof(*bvme_init_tab); ++i)
				SCCwrite(bvme_init_tab[i].reg, bvme_init_tab[i].val);
		}
#endif

		/* remember status register for detection of DCD and CTS changes */
		scc_last_status_reg[channel] = SCCread(STATUS_REG);

		port->c_dcd = 0;	/* Prevent initial 1->0 interrupt */
		scc_setsignals (port, 1,1);
		restore_flags(flags);
	}

	tty->driver_data = port;
	port->gs.tty = tty;
	port->gs.count++;
	retval = gs_init_port(&port->gs);
	if (retval) {
		port->gs.count--;
		return retval;
	}
	port->gs.flags |= GS_ACTIVE;
	if (port->gs.count == 1) {
		MOD_INC_USE_COUNT;
	}
	retval = gs_block_til_ready(port, filp);

	if (retval) {
		MOD_DEC_USE_COUNT;
		port->gs.count--;
		return retval;
	}

	if ((port->gs.count == 1) && (port->gs.flags & ASYNC_SPLIT_TERMIOS)) {
		if (tty->driver.subtype == SERIAL_TYPE_NORMAL)
			*tty->termios = port->gs.normal_termios;
		else 
			*tty->termios = port->gs.callout_termios;
		scc_set_real_termios (port);
	}

	port->gs.session = current->session;
	port->gs.pgrp = current->pgrp;
	port->c_dcd = scc_get_CD (port);

	scc_enable_rx_interrupts(port);

	return 0;
}