[POWERPC] typo fix and whitespace cleanup on mpc52xx-uart driver
Single typo fix and whitespace changes. In preparation for heavy changes to this driver when support for arch/powerpc is added. Since the driver will be changing significantly anyway, then may as well take the opportunity to clean it up first. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Sylvain Munaut <tnt@246tNt.com> Signed-off-by: Paul Mackerras <paulus@samba.org>hifive-unleashed-5.1
Grant Likely
Paul Mackerras
parent
872455e2ca
commit
9b9129e739
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@ -1,6 +1,4 @@
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/*
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* drivers/serial/mpc52xx_uart.c
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*
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* Driver for the PSC of the Freescale MPC52xx PSCs configured as UARTs.
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*
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* FIXME According to the usermanual the status bits in the status register
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@ -14,18 +12,18 @@
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*
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*
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* Maintainer : Sylvain Munaut <tnt@246tNt.com>
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*
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*
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* Some of the code has been inspired/copied from the 2.4 code written
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* by Dale Farnsworth <dfarnsworth@mvista.com>.
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*
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*
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* Copyright (C) 2004-2005 Sylvain Munaut <tnt@246tNt.com>
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* Copyright (C) 2003 MontaVista, Software, Inc.
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*
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*
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* This file is licensed under the terms of the GNU General Public License
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* version 2. This program is licensed "as is" without any warranty of any
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* kind, whether express or implied.
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*/
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/* Platform device Usage :
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*
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* Since PSCs can have multiple function, the correct driver for each one
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@ -101,27 +99,27 @@ static irqreturn_t mpc52xx_uart_int(int irq,void *dev_id);
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/* UART operations */
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/* ======================================================================== */
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static unsigned int
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static unsigned int
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mpc52xx_uart_tx_empty(struct uart_port *port)
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{
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int status = in_be16(&PSC(port)->mpc52xx_psc_status);
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return (status & MPC52xx_PSC_SR_TXEMP) ? TIOCSER_TEMT : 0;
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}
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static void
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static void
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mpc52xx_uart_set_mctrl(struct uart_port *port, unsigned int mctrl)
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{
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/* Not implemented */
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}
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static unsigned int
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static unsigned int
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mpc52xx_uart_get_mctrl(struct uart_port *port)
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{
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/* Not implemented */
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return TIOCM_CTS | TIOCM_DSR | TIOCM_CAR;
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}
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static void
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static void
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mpc52xx_uart_stop_tx(struct uart_port *port)
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{
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/* port->lock taken by caller */
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@ -129,7 +127,7 @@ mpc52xx_uart_stop_tx(struct uart_port *port)
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out_be16(&PSC(port)->mpc52xx_psc_imr,port->read_status_mask);
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}
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static void
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static void
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mpc52xx_uart_start_tx(struct uart_port *port)
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{
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/* port->lock taken by caller */
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@ -137,12 +135,12 @@ mpc52xx_uart_start_tx(struct uart_port *port)
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out_be16(&PSC(port)->mpc52xx_psc_imr,port->read_status_mask);
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}
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static void
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static void
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mpc52xx_uart_send_xchar(struct uart_port *port, char ch)
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{
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unsigned long flags;
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spin_lock_irqsave(&port->lock, flags);
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port->x_char = ch;
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if (ch) {
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/* Make sure tx interrupts are on */
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@ -150,7 +148,7 @@ mpc52xx_uart_send_xchar(struct uart_port *port, char ch)
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port->read_status_mask |= MPC52xx_PSC_IMR_TXRDY;
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out_be16(&PSC(port)->mpc52xx_psc_imr,port->read_status_mask);
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}
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spin_unlock_irqrestore(&port->lock, flags);
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}
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@ -178,7 +176,7 @@ mpc52xx_uart_break_ctl(struct uart_port *port, int ctl)
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out_8(&PSC(port)->command,MPC52xx_PSC_START_BRK);
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else
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out_8(&PSC(port)->command,MPC52xx_PSC_STOP_BRK);
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spin_unlock_irqrestore(&port->lock, flags);
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}
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@ -197,11 +195,11 @@ mpc52xx_uart_startup(struct uart_port *port)
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/* Reset/activate the port, clear and enable interrupts */
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out_8(&psc->command,MPC52xx_PSC_RST_RX);
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out_8(&psc->command,MPC52xx_PSC_RST_TX);
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out_be32(&psc->sicr,0); /* UART mode DCD ignored */
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out_be16(&psc->mpc52xx_psc_clock_select, 0xdd00); /* /16 prescaler on */
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out_8(&psc->rfcntl, 0x00);
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out_be16(&psc->rfalarm, 0x1ff);
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out_8(&psc->tfcntl, 0x07);
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@ -209,10 +207,10 @@ mpc52xx_uart_startup(struct uart_port *port)
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port->read_status_mask |= MPC52xx_PSC_IMR_RXRDY | MPC52xx_PSC_IMR_TXRDY;
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out_be16(&psc->mpc52xx_psc_imr,port->read_status_mask);
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out_8(&psc->command,MPC52xx_PSC_TX_ENABLE);
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out_8(&psc->command,MPC52xx_PSC_RX_ENABLE);
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return 0;
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}
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@ -220,19 +218,19 @@ static void
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mpc52xx_uart_shutdown(struct uart_port *port)
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{
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struct mpc52xx_psc __iomem *psc = PSC(port);
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/* Shut down the port, interrupt and all */
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out_8(&psc->command,MPC52xx_PSC_RST_RX);
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out_8(&psc->command,MPC52xx_PSC_RST_TX);
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port->read_status_mask = 0;
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port->read_status_mask = 0;
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out_be16(&psc->mpc52xx_psc_imr,port->read_status_mask);
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/* Release interrupt */
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free_irq(port->irq, port);
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}
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static void
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static void
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mpc52xx_uart_set_termios(struct uart_port *port, struct termios *new,
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struct termios *old)
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{
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@ -241,10 +239,10 @@ mpc52xx_uart_set_termios(struct uart_port *port, struct termios *new,
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unsigned char mr1, mr2;
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unsigned short ctr;
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unsigned int j, baud, quot;
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/* Prepare what we're gonna write */
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mr1 = 0;
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switch (new->c_cflag & CSIZE) {
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case CS5: mr1 |= MPC52xx_PSC_MODE_5_BITS;
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break;
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@ -261,8 +259,8 @@ mpc52xx_uart_set_termios(struct uart_port *port, struct termios *new,
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MPC52xx_PSC_MODE_PARODD : MPC52xx_PSC_MODE_PAREVEN;
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} else
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mr1 |= MPC52xx_PSC_MODE_PARNONE;
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mr2 = 0;
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if (new->c_cflag & CSTOPB)
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@ -276,7 +274,7 @@ mpc52xx_uart_set_termios(struct uart_port *port, struct termios *new,
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baud = uart_get_baud_rate(port, new, old, 0, port->uartclk/16);
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quot = uart_get_divisor(port, baud);
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ctr = quot & 0xffff;
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/* Get the lock */
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spin_lock_irqsave(&port->lock, flags);
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@ -290,14 +288,14 @@ mpc52xx_uart_set_termios(struct uart_port *port, struct termios *new,
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* boot for the console, all stuff is not yet ready to receive at that
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* time and that just makes the kernel oops */
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/* while (j-- && mpc52xx_uart_int_rx_chars(port)); */
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while (!(in_be16(&psc->mpc52xx_psc_status) & MPC52xx_PSC_SR_TXEMP) &&
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while (!(in_be16(&psc->mpc52xx_psc_status) & MPC52xx_PSC_SR_TXEMP) &&
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--j)
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udelay(1);
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if (!j)
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printk( KERN_ERR "mpc52xx_uart.c: "
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"Unable to flush RX & TX fifos in-time in set_termios."
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"Some chars may have been lost.\n" );
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"Some chars may have been lost.\n" );
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/* Reset the TX & RX */
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out_8(&psc->command,MPC52xx_PSC_RST_RX);
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@ -309,7 +307,7 @@ mpc52xx_uart_set_termios(struct uart_port *port, struct termios *new,
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out_8(&psc->mode,mr2);
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out_8(&psc->ctur,ctr >> 8);
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out_8(&psc->ctlr,ctr & 0xff);
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/* Reenable TX & RX */
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out_8(&psc->command,MPC52xx_PSC_TX_ENABLE);
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out_8(&psc->command,MPC52xx_PSC_RX_ENABLE);
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@ -373,7 +371,7 @@ mpc52xx_uart_verify_port(struct uart_port *port, struct serial_struct *ser)
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if ( (ser->irq != port->irq) ||
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(ser->io_type != SERIAL_IO_MEM) ||
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(ser->baud_base != port->uartclk) ||
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(ser->baud_base != port->uartclk) ||
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(ser->iomem_base != (void*)port->mapbase) ||
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(ser->hub6 != 0 ) )
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return -EINVAL;
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@ -404,11 +402,11 @@ static struct uart_ops mpc52xx_uart_ops = {
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.verify_port = mpc52xx_uart_verify_port
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};
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/* ======================================================================== */
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/* Interrupt handling */
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/* ======================================================================== */
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static inline int
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mpc52xx_uart_int_rx_chars(struct uart_port *port)
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{
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@ -435,11 +433,11 @@ mpc52xx_uart_int_rx_chars(struct uart_port *port)
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flag = TTY_NORMAL;
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port->icount.rx++;
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if ( status & (MPC52xx_PSC_SR_PE |
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MPC52xx_PSC_SR_FE |
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MPC52xx_PSC_SR_RB) ) {
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if (status & MPC52xx_PSC_SR_RB) {
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flag = TTY_BREAK;
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uart_handle_break(port);
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@ -464,7 +462,7 @@ mpc52xx_uart_int_rx_chars(struct uart_port *port)
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}
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tty_flip_buffer_push(tty);
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return in_be16(&PSC(port)->mpc52xx_psc_status) & MPC52xx_PSC_SR_RXRDY;
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}
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@ -509,25 +507,25 @@ mpc52xx_uart_int_tx_chars(struct uart_port *port)
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return 1;
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}
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static irqreturn_t
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static irqreturn_t
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mpc52xx_uart_int(int irq, void *dev_id)
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{
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struct uart_port *port = dev_id;
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unsigned long pass = ISR_PASS_LIMIT;
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unsigned int keepgoing;
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unsigned short status;
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spin_lock(&port->lock);
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/* While we have stuff to do, we continue */
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do {
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/* If we don't find anything to do, we stop */
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keepgoing = 0;
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keepgoing = 0;
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/* Read status */
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status = in_be16(&PSC(port)->mpc52xx_psc_isr);
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status &= port->read_status_mask;
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/* Do we need to receive chars ? */
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/* For this RX interrupts must be on and some chars waiting */
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if ( status & MPC52xx_PSC_IMR_RXRDY )
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@ -537,15 +535,15 @@ mpc52xx_uart_int(int irq, void *dev_id)
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/* For this, TX must be ready and TX interrupt enabled */
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if ( status & MPC52xx_PSC_IMR_TXRDY )
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keepgoing |= mpc52xx_uart_int_tx_chars(port);
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/* Limit number of iteration */
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if ( !(--pass) )
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keepgoing = 0;
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} while (keepgoing);
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spin_unlock(&port->lock);
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return IRQ_HANDLED;
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}
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@ -566,7 +564,7 @@ mpc52xx_console_get_options(struct uart_port *port,
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/* Read the mode registers */
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out_8(&psc->command,MPC52xx_PSC_SEL_MODE_REG_1);
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mr1 = in_8(&psc->mode);
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/* CT{U,L}R are write-only ! */
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*baud = __res.bi_baudrate ?
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__res.bi_baudrate : CONFIG_SERIAL_MPC52xx_CONSOLE_BAUD;
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@ -579,26 +577,26 @@ mpc52xx_console_get_options(struct uart_port *port,
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case MPC52xx_PSC_MODE_8_BITS:
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default: *bits = 8;
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}
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if (mr1 & MPC52xx_PSC_MODE_PARNONE)
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*parity = 'n';
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else
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*parity = mr1 & MPC52xx_PSC_MODE_PARODD ? 'o' : 'e';
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}
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static void
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static void
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mpc52xx_console_write(struct console *co, const char *s, unsigned int count)
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{
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struct uart_port *port = &mpc52xx_uart_ports[co->index];
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struct mpc52xx_psc __iomem *psc = PSC(port);
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unsigned int i, j;
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/* Disable interrupts */
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out_be16(&psc->mpc52xx_psc_imr, 0);
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/* Wait the TX buffer to be empty */
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j = 5000000; /* Maximum wait */
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while (!(in_be16(&psc->mpc52xx_psc_status) & MPC52xx_PSC_SR_TXEMP) &&
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j = 5000000; /* Maximum wait */
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while (!(in_be16(&psc->mpc52xx_psc_status) & MPC52xx_PSC_SR_TXEMP) &&
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--j)
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udelay(1);
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@ -607,13 +605,13 @@ mpc52xx_console_write(struct console *co, const char *s, unsigned int count)
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/* Line return handling */
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if (*s == '\n')
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out_8(&psc->mpc52xx_psc_buffer_8, '\r');
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/* Send the char */
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out_8(&psc->mpc52xx_psc_buffer_8, *s);
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/* Wait the TX buffer to be empty */
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j = 20000; /* Maximum wait */
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while (!(in_be16(&psc->mpc52xx_psc_status) &
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j = 20000; /* Maximum wait */
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while (!(in_be16(&psc->mpc52xx_psc_status) &
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MPC52xx_PSC_SR_TXEMP) && --j)
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udelay(1);
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}
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@ -634,7 +632,7 @@ mpc52xx_console_setup(struct console *co, char *options)
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if (co->index < 0 || co->index >= MPC52xx_PSC_MAXNUM)
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return -EINVAL;
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/* Basic port init. Needed since we use some uart_??? func before
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* real init for early access */
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spin_lock_init(&port->lock);
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@ -669,8 +667,8 @@ static struct console mpc52xx_console = {
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.data = &mpc52xx_uart_driver,
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};
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static int __init
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static int __init
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mpc52xx_console_init(void)
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{
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register_console(&mpc52xx_console);
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@ -771,7 +769,7 @@ mpc52xx_uart_suspend(struct platform_device *dev, pm_message_t state)
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{
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struct uart_port *port = (struct uart_port *) platform_get_drvdata(dev);
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if (sport)
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if (port)
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uart_suspend_port(&mpc52xx_uart_driver, port);
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return 0;
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