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authorGreg Kroah-Hartman <gregkh@suse.de>2011-01-13 12:10:18 -0800
committerGreg Kroah-Hartman <gregkh@suse.de>2011-01-13 12:10:18 -0800
commitab4382d27412e7e3e7c936e8d50d8888dfac3df8 (patch)
tree51d96dea2431140358784b6b426715f37f74fd53 /drivers/serial/mcf.c
parent728674a7e466628df2aeec6d11a2ae1ef968fb67 (diff)
tty: move drivers/serial/ to drivers/tty/serial/
The serial drivers are really just tty drivers, so move them to drivers/tty/ to make things a bit neater overall. This is part of the tty/serial driver movement proceedure as proposed by Arnd Bergmann and approved by everyone involved a number of months ago. Cc: Arnd Bergmann <arnd@arndb.de> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Rogier Wolff <R.E.Wolff@bitwizard.nl> Cc: Michael H. Warfield <mhw@wittsend.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/serial/mcf.c')
-rw-r--r--drivers/serial/mcf.c662
1 files changed, 0 insertions, 662 deletions
diff --git a/drivers/serial/mcf.c b/drivers/serial/mcf.c
deleted file mode 100644
index 3394b7cc172..00000000000
--- a/drivers/serial/mcf.c
+++ /dev/null
@@ -1,662 +0,0 @@
-/****************************************************************************/
-
-/*
- * mcf.c -- Freescale ColdFire UART driver
- *
- * (C) Copyright 2003-2007, Greg Ungerer <gerg@snapgear.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-/****************************************************************************/
-
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/module.h>
-#include <linux/console.h>
-#include <linux/tty.h>
-#include <linux/tty_flip.h>
-#include <linux/serial.h>
-#include <linux/serial_core.h>
-#include <linux/io.h>
-#include <asm/coldfire.h>
-#include <asm/mcfsim.h>
-#include <asm/mcfuart.h>
-#include <asm/nettel.h>
-
-/****************************************************************************/
-
-/*
- * Some boards implement the DTR/DCD lines using GPIO lines, most
- * don't. Dummy out the access macros for those that don't. Those
- * that do should define these macros somewhere in there board
- * specific inlude files.
- */
-#if !defined(mcf_getppdcd)
-#define mcf_getppdcd(p) (1)
-#endif
-#if !defined(mcf_getppdtr)
-#define mcf_getppdtr(p) (1)
-#endif
-#if !defined(mcf_setppdtr)
-#define mcf_setppdtr(p, v) do { } while (0)
-#endif
-
-/****************************************************************************/
-
-/*
- * Local per-uart structure.
- */
-struct mcf_uart {
- struct uart_port port;
- unsigned int sigs; /* Local copy of line sigs */
- unsigned char imr; /* Local IMR mirror */
-};
-
-/****************************************************************************/
-
-static unsigned int mcf_tx_empty(struct uart_port *port)
-{
- return (readb(port->membase + MCFUART_USR) & MCFUART_USR_TXEMPTY) ?
- TIOCSER_TEMT : 0;
-}
-
-/****************************************************************************/
-
-static unsigned int mcf_get_mctrl(struct uart_port *port)
-{
- struct mcf_uart *pp = container_of(port, struct mcf_uart, port);
- unsigned int sigs;
-
- sigs = (readb(port->membase + MCFUART_UIPR) & MCFUART_UIPR_CTS) ?
- 0 : TIOCM_CTS;
- sigs |= (pp->sigs & TIOCM_RTS);
- sigs |= (mcf_getppdcd(port->line) ? TIOCM_CD : 0);
- sigs |= (mcf_getppdtr(port->line) ? TIOCM_DTR : 0);
-
- return sigs;
-}
-
-/****************************************************************************/
-
-static void mcf_set_mctrl(struct uart_port *port, unsigned int sigs)
-{
- struct mcf_uart *pp = container_of(port, struct mcf_uart, port);
-
- pp->sigs = sigs;
- mcf_setppdtr(port->line, (sigs & TIOCM_DTR));
- if (sigs & TIOCM_RTS)
- writeb(MCFUART_UOP_RTS, port->membase + MCFUART_UOP1);
- else
- writeb(MCFUART_UOP_RTS, port->membase + MCFUART_UOP0);
-}
-
-/****************************************************************************/
-
-static void mcf_start_tx(struct uart_port *port)
-{
- struct mcf_uart *pp = container_of(port, struct mcf_uart, port);
-
- pp->imr |= MCFUART_UIR_TXREADY;
- writeb(pp->imr, port->membase + MCFUART_UIMR);
-}
-
-/****************************************************************************/
-
-static void mcf_stop_tx(struct uart_port *port)
-{
- struct mcf_uart *pp = container_of(port, struct mcf_uart, port);
-
- pp->imr &= ~MCFUART_UIR_TXREADY;
- writeb(pp->imr, port->membase + MCFUART_UIMR);
-}
-
-/****************************************************************************/
-
-static void mcf_stop_rx(struct uart_port *port)
-{
- struct mcf_uart *pp = container_of(port, struct mcf_uart, port);
-
- pp->imr &= ~MCFUART_UIR_RXREADY;
- writeb(pp->imr, port->membase + MCFUART_UIMR);
-}
-
-/****************************************************************************/
-
-static void mcf_break_ctl(struct uart_port *port, int break_state)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&port->lock, flags);
- if (break_state == -1)
- writeb(MCFUART_UCR_CMDBREAKSTART, port->membase + MCFUART_UCR);
- else
- writeb(MCFUART_UCR_CMDBREAKSTOP, port->membase + MCFUART_UCR);
- spin_unlock_irqrestore(&port->lock, flags);
-}
-
-/****************************************************************************/
-
-static void mcf_enable_ms(struct uart_port *port)
-{
-}
-
-/****************************************************************************/
-
-static int mcf_startup(struct uart_port *port)
-{
- struct mcf_uart *pp = container_of(port, struct mcf_uart, port);
- unsigned long flags;
-
- spin_lock_irqsave(&port->lock, flags);
-
- /* Reset UART, get it into known state... */
- writeb(MCFUART_UCR_CMDRESETRX, port->membase + MCFUART_UCR);
- writeb(MCFUART_UCR_CMDRESETTX, port->membase + MCFUART_UCR);
-
- /* Enable the UART transmitter and receiver */
- writeb(MCFUART_UCR_RXENABLE | MCFUART_UCR_TXENABLE,
- port->membase + MCFUART_UCR);
-
- /* Enable RX interrupts now */
- pp->imr = MCFUART_UIR_RXREADY;
- writeb(pp->imr, port->membase + MCFUART_UIMR);
-
- spin_unlock_irqrestore(&port->lock, flags);
-
- return 0;
-}
-
-/****************************************************************************/
-
-static void mcf_shutdown(struct uart_port *port)
-{
- struct mcf_uart *pp = container_of(port, struct mcf_uart, port);
- unsigned long flags;
-
- spin_lock_irqsave(&port->lock, flags);
-
- /* Disable all interrupts now */
- pp->imr = 0;
- writeb(pp->imr, port->membase + MCFUART_UIMR);
-
- /* Disable UART transmitter and receiver */
- writeb(MCFUART_UCR_CMDRESETRX, port->membase + MCFUART_UCR);
- writeb(MCFUART_UCR_CMDRESETTX, port->membase + MCFUART_UCR);
-
- spin_unlock_irqrestore(&port->lock, flags);
-}
-
-/****************************************************************************/
-
-static void mcf_set_termios(struct uart_port *port, struct ktermios *termios,
- struct ktermios *old)
-{
- unsigned long flags;
- unsigned int baud, baudclk;
-#if defined(CONFIG_M5272)
- unsigned int baudfr;
-#endif
- unsigned char mr1, mr2;
-
- baud = uart_get_baud_rate(port, termios, old, 0, 230400);
-#if defined(CONFIG_M5272)
- baudclk = (MCF_BUSCLK / baud) / 32;
- baudfr = (((MCF_BUSCLK / baud) + 1) / 2) % 16;
-#else
- baudclk = ((MCF_BUSCLK / baud) + 16) / 32;
-#endif
-
- mr1 = MCFUART_MR1_RXIRQRDY | MCFUART_MR1_RXERRCHAR;
- mr2 = 0;
-
- switch (termios->c_cflag & CSIZE) {
- case CS5: mr1 |= MCFUART_MR1_CS5; break;
- case CS6: mr1 |= MCFUART_MR1_CS6; break;
- case CS7: mr1 |= MCFUART_MR1_CS7; break;
- case CS8:
- default: mr1 |= MCFUART_MR1_CS8; break;
- }
-
- if (termios->c_cflag & PARENB) {
- if (termios->c_cflag & CMSPAR) {
- if (termios->c_cflag & PARODD)
- mr1 |= MCFUART_MR1_PARITYMARK;
- else
- mr1 |= MCFUART_MR1_PARITYSPACE;
- } else {
- if (termios->c_cflag & PARODD)
- mr1 |= MCFUART_MR1_PARITYODD;
- else
- mr1 |= MCFUART_MR1_PARITYEVEN;
- }
- } else {
- mr1 |= MCFUART_MR1_PARITYNONE;
- }
-
- if (termios->c_cflag & CSTOPB)
- mr2 |= MCFUART_MR2_STOP2;
- else
- mr2 |= MCFUART_MR2_STOP1;
-
- if (termios->c_cflag & CRTSCTS) {
- mr1 |= MCFUART_MR1_RXRTS;
- mr2 |= MCFUART_MR2_TXCTS;
- }
-
- spin_lock_irqsave(&port->lock, flags);
- uart_update_timeout(port, termios->c_cflag, baud);
- writeb(MCFUART_UCR_CMDRESETRX, port->membase + MCFUART_UCR);
- writeb(MCFUART_UCR_CMDRESETTX, port->membase + MCFUART_UCR);
- writeb(MCFUART_UCR_CMDRESETMRPTR, port->membase + MCFUART_UCR);
- writeb(mr1, port->membase + MCFUART_UMR);
- writeb(mr2, port->membase + MCFUART_UMR);
- writeb((baudclk & 0xff00) >> 8, port->membase + MCFUART_UBG1);
- writeb((baudclk & 0xff), port->membase + MCFUART_UBG2);
-#if defined(CONFIG_M5272)
- writeb((baudfr & 0x0f), port->membase + MCFUART_UFPD);
-#endif
- writeb(MCFUART_UCSR_RXCLKTIMER | MCFUART_UCSR_TXCLKTIMER,
- port->membase + MCFUART_UCSR);
- writeb(MCFUART_UCR_RXENABLE | MCFUART_UCR_TXENABLE,
- port->membase + MCFUART_UCR);
- spin_unlock_irqrestore(&port->lock, flags);
-}
-
-/****************************************************************************/
-
-static void mcf_rx_chars(struct mcf_uart *pp)
-{
- struct uart_port *port = &pp->port;
- unsigned char status, ch, flag;
-
- while ((status = readb(port->membase + MCFUART_USR)) & MCFUART_USR_RXREADY) {
- ch = readb(port->membase + MCFUART_URB);
- flag = TTY_NORMAL;
- port->icount.rx++;
-
- if (status & MCFUART_USR_RXERR) {
- writeb(MCFUART_UCR_CMDRESETERR,
- port->membase + MCFUART_UCR);
-
- if (status & MCFUART_USR_RXBREAK) {
- port->icount.brk++;
- if (uart_handle_break(port))
- continue;
- } else if (status & MCFUART_USR_RXPARITY) {
- port->icount.parity++;
- } else if (status & MCFUART_USR_RXOVERRUN) {
- port->icount.overrun++;
- } else if (status & MCFUART_USR_RXFRAMING) {
- port->icount.frame++;
- }
-
- status &= port->read_status_mask;
-
- if (status & MCFUART_USR_RXBREAK)
- flag = TTY_BREAK;
- else if (status & MCFUART_USR_RXPARITY)
- flag = TTY_PARITY;
- else if (status & MCFUART_USR_RXFRAMING)
- flag = TTY_FRAME;
- }
-
- if (uart_handle_sysrq_char(port, ch))
- continue;
- uart_insert_char(port, status, MCFUART_USR_RXOVERRUN, ch, flag);
- }
-
- tty_flip_buffer_push(port->state->port.tty);
-}
-
-/****************************************************************************/
-
-static void mcf_tx_chars(struct mcf_uart *pp)
-{
- struct uart_port *port = &pp->port;
- struct circ_buf *xmit = &port->state->xmit;
-
- if (port->x_char) {
- /* Send special char - probably flow control */
- writeb(port->x_char, port->membase + MCFUART_UTB);
- port->x_char = 0;
- port->icount.tx++;
- return;
- }
-
- while (readb(port->membase + MCFUART_USR) & MCFUART_USR_TXREADY) {
- if (xmit->head == xmit->tail)
- break;
- writeb(xmit->buf[xmit->tail], port->membase + MCFUART_UTB);
- xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE -1);
- port->icount.tx++;
- }
-
- if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
- uart_write_wakeup(port);
-
- if (xmit->head == xmit->tail) {
- pp->imr &= ~MCFUART_UIR_TXREADY;
- writeb(pp->imr, port->membase + MCFUART_UIMR);
- }
-}
-
-/****************************************************************************/
-
-static irqreturn_t mcf_interrupt(int irq, void *data)
-{
- struct uart_port *port = data;
- struct mcf_uart *pp = container_of(port, struct mcf_uart, port);
- unsigned int isr;
- irqreturn_t ret = IRQ_NONE;
-
- isr = readb(port->membase + MCFUART_UISR) & pp->imr;
-
- spin_lock(&port->lock);
- if (isr & MCFUART_UIR_RXREADY) {
- mcf_rx_chars(pp);
- ret = IRQ_HANDLED;
- }
- if (isr & MCFUART_UIR_TXREADY) {
- mcf_tx_chars(pp);
- ret = IRQ_HANDLED;
- }
- spin_unlock(&port->lock);
-
- return ret;
-}
-
-/****************************************************************************/
-
-static void mcf_config_port(struct uart_port *port, int flags)
-{
- port->type = PORT_MCF;
- port->fifosize = MCFUART_TXFIFOSIZE;
-
- /* Clear mask, so no surprise interrupts. */
- writeb(0, port->membase + MCFUART_UIMR);
-
- if (request_irq(port->irq, mcf_interrupt, IRQF_DISABLED, "UART", port))
- printk(KERN_ERR "MCF: unable to attach ColdFire UART %d "
- "interrupt vector=%d\n", port->line, port->irq);
-}
-
-/****************************************************************************/
-
-static const char *mcf_type(struct uart_port *port)
-{
- return (port->type == PORT_MCF) ? "ColdFire UART" : NULL;
-}
-
-/****************************************************************************/
-
-static int mcf_request_port(struct uart_port *port)
-{
- /* UARTs always present */
- return 0;
-}
-
-/****************************************************************************/
-
-static void mcf_release_port(struct uart_port *port)
-{
- /* Nothing to release... */
-}
-
-/****************************************************************************/
-
-static int mcf_verify_port(struct uart_port *port, struct serial_struct *ser)
-{
- if ((ser->type != PORT_UNKNOWN) && (ser->type != PORT_MCF))
- return -EINVAL;
- return 0;
-}
-
-/****************************************************************************/
-
-/*
- * Define the basic serial functions we support.
- */
-static const struct uart_ops mcf_uart_ops = {
- .tx_empty = mcf_tx_empty,
- .get_mctrl = mcf_get_mctrl,
- .set_mctrl = mcf_set_mctrl,
- .start_tx = mcf_start_tx,
- .stop_tx = mcf_stop_tx,
- .stop_rx = mcf_stop_rx,
- .enable_ms = mcf_enable_ms,
- .break_ctl = mcf_break_ctl,
- .startup = mcf_startup,
- .shutdown = mcf_shutdown,
- .set_termios = mcf_set_termios,
- .type = mcf_type,
- .request_port = mcf_request_port,
- .release_port = mcf_release_port,
- .config_port = mcf_config_port,
- .verify_port = mcf_verify_port,
-};
-
-static struct mcf_uart mcf_ports[4];
-
-#define MCF_MAXPORTS ARRAY_SIZE(mcf_ports)
-
-/****************************************************************************/
-#if defined(CONFIG_SERIAL_MCF_CONSOLE)
-/****************************************************************************/
-
-int __init early_mcf_setup(struct mcf_platform_uart *platp)
-{
- struct uart_port *port;
- int i;
-
- for (i = 0; ((i < MCF_MAXPORTS) && (platp[i].mapbase)); i++) {
- port = &mcf_ports[i].port;
-
- port->line = i;
- port->type = PORT_MCF;
- port->mapbase = platp[i].mapbase;
- port->membase = (platp[i].membase) ? platp[i].membase :
- (unsigned char __iomem *) port->mapbase;
- port->iotype = SERIAL_IO_MEM;
- port->irq = platp[i].irq;
- port->uartclk = MCF_BUSCLK;
- port->flags = ASYNC_BOOT_AUTOCONF;
- port->ops = &mcf_uart_ops;
- }
-
- return 0;
-}
-
-/****************************************************************************/
-
-static void mcf_console_putc(struct console *co, const char c)
-{
- struct uart_port *port = &(mcf_ports + co->index)->port;
- int i;
-
- for (i = 0; (i < 0x10000); i++) {
- if (readb(port->membase + MCFUART_USR) & MCFUART_USR_TXREADY)
- break;
- }
- writeb(c, port->membase + MCFUART_UTB);
- for (i = 0; (i < 0x10000); i++) {
- if (readb(port->membase + MCFUART_USR) & MCFUART_USR_TXREADY)
- break;
- }
-}
-
-/****************************************************************************/
-
-static void mcf_console_write(struct console *co, const char *s, unsigned int count)
-{
- for (; (count); count--, s++) {
- mcf_console_putc(co, *s);
- if (*s == '\n')
- mcf_console_putc(co, '\r');
- }
-}
-
-/****************************************************************************/
-
-static int __init mcf_console_setup(struct console *co, char *options)
-{
- struct uart_port *port;
- int baud = CONFIG_SERIAL_MCF_BAUDRATE;
- int bits = 8;
- int parity = 'n';
- int flow = 'n';
-
- if ((co->index < 0) || (co->index >= MCF_MAXPORTS))
- co->index = 0;
- port = &mcf_ports[co->index].port;
- if (port->membase == 0)
- return -ENODEV;
-
- if (options)
- uart_parse_options(options, &baud, &parity, &bits, &flow);
-
- return uart_set_options(port, co, baud, parity, bits, flow);
-}
-
-/****************************************************************************/
-
-static struct uart_driver mcf_driver;
-
-static struct console mcf_console = {
- .name = "ttyS",
- .write = mcf_console_write,
- .device = uart_console_device,
- .setup = mcf_console_setup,
- .flags = CON_PRINTBUFFER,
- .index = -1,
- .data = &mcf_driver,
-};
-
-static int __init mcf_console_init(void)
-{
- register_console(&mcf_console);
- return 0;
-}
-
-console_initcall(mcf_console_init);
-
-#define MCF_CONSOLE &mcf_console
-
-/****************************************************************************/
-#else
-/****************************************************************************/
-
-#define MCF_CONSOLE NULL
-
-/****************************************************************************/
-#endif /* CONFIG_MCF_CONSOLE */
-/****************************************************************************/
-
-/*
- * Define the mcf UART driver structure.
- */
-static struct uart_driver mcf_driver = {
- .owner = THIS_MODULE,
- .driver_name = "mcf",
- .dev_name = "ttyS",
- .major = TTY_MAJOR,
- .minor = 64,
- .nr = MCF_MAXPORTS,
- .cons = MCF_CONSOLE,
-};
-
-/****************************************************************************/
-
-static int __devinit mcf_probe(struct platform_device *pdev)
-{
- struct mcf_platform_uart *platp = pdev->dev.platform_data;
- struct uart_port *port;
- int i;
-
- for (i = 0; ((i < MCF_MAXPORTS) && (platp[i].mapbase)); i++) {
- port = &mcf_ports[i].port;
-
- port->line = i;
- port->type = PORT_MCF;
- port->mapbase = platp[i].mapbase;
- port->membase = (platp[i].membase) ? platp[i].membase :
- (unsigned char __iomem *) platp[i].mapbase;
- port->iotype = SERIAL_IO_MEM;
- port->irq = platp[i].irq;
- port->uartclk = MCF_BUSCLK;
- port->ops = &mcf_uart_ops;
- port->flags = ASYNC_BOOT_AUTOCONF;
-
- uart_add_one_port(&mcf_driver, port);
- }
-
- return 0;
-}
-
-/****************************************************************************/
-
-static int __devexit mcf_remove(struct platform_device *pdev)
-{
- struct uart_port *port;
- int i;
-
- for (i = 0; (i < MCF_MAXPORTS); i++) {
- port = &mcf_ports[i].port;
- if (port)
- uart_remove_one_port(&mcf_driver, port);
- }
-
- return 0;
-}
-
-/****************************************************************************/
-
-static struct platform_driver mcf_platform_driver = {
- .probe = mcf_probe,
- .remove = __devexit_p(mcf_remove),
- .driver = {
- .name = "mcfuart",
- .owner = THIS_MODULE,
- },
-};
-
-/****************************************************************************/
-
-static int __init mcf_init(void)
-{
- int rc;
-
- printk("ColdFire internal UART serial driver\n");
-
- rc = uart_register_driver(&mcf_driver);
- if (rc)
- return rc;
- rc = platform_driver_register(&mcf_platform_driver);
- if (rc)
- return rc;
- return 0;
-}
-
-/****************************************************************************/
-
-static void __exit mcf_exit(void)
-{
- platform_driver_unregister(&mcf_platform_driver);
- uart_unregister_driver(&mcf_driver);
-}
-
-/****************************************************************************/
-
-module_init(mcf_init);
-module_exit(mcf_exit);
-
-MODULE_AUTHOR("Greg Ungerer <gerg@snapgear.com>");
-MODULE_DESCRIPTION("Freescale ColdFire UART driver");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:mcfuart");
-
-/****************************************************************************/