+++ /dev/null
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Derived from many drivers using generic_serial interface.
- *
- * Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
- *
- * Serial driver for BCM63xx integrated UART.
- *
- * Hardware flow control was _not_ tested since I only have RX/TX on
- * my board.
- */
-
-#if defined(CONFIG_SERIAL_BCM63XX_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
-
-#include <linux/kernel.h>
-#include <linux/platform_device.h>
-#include <linux/init.h>
-#include <linux/delay.h>
-#include <linux/module.h>
-#include <linux/console.h>
-#include <linux/clk.h>
-#include <linux/tty.h>
-#include <linux/tty_flip.h>
-#include <linux/sysrq.h>
-#include <linux/serial.h>
-#include <linux/serial_core.h>
-
-#include <bcm63xx_clk.h>
-#include <bcm63xx_irq.h>
-#include <bcm63xx_regs.h>
-#include <bcm63xx_io.h>
-
-#define BCM63XX_NR_UARTS 1
-
-static struct uart_port ports[BCM63XX_NR_UARTS];
-
-/*
- * rx interrupt mask / stat
- *
- * mask:
- * - rx fifo full
- * - rx fifo above threshold
- * - rx fifo not empty for too long
- */
-#define UART_RX_INT_MASK (UART_IR_MASK(UART_IR_RXOVER) | \
- UART_IR_MASK(UART_IR_RXTHRESH) | \
- UART_IR_MASK(UART_IR_RXTIMEOUT))
-
-#define UART_RX_INT_STAT (UART_IR_STAT(UART_IR_RXOVER) | \
- UART_IR_STAT(UART_IR_RXTHRESH) | \
- UART_IR_STAT(UART_IR_RXTIMEOUT))
-
-/*
- * tx interrupt mask / stat
- *
- * mask:
- * - tx fifo empty
- * - tx fifo below threshold
- */
-#define UART_TX_INT_MASK (UART_IR_MASK(UART_IR_TXEMPTY) | \
- UART_IR_MASK(UART_IR_TXTRESH))
-
-#define UART_TX_INT_STAT (UART_IR_STAT(UART_IR_TXEMPTY) | \
- UART_IR_STAT(UART_IR_TXTRESH))
-
-/*
- * external input interrupt
- *
- * mask: any edge on CTS, DCD
- */
-#define UART_EXTINP_INT_MASK (UART_EXTINP_IRMASK(UART_EXTINP_IR_CTS) | \
- UART_EXTINP_IRMASK(UART_EXTINP_IR_DCD))
-
-/*
- * handy uart register accessor
- */
-static inline unsigned int bcm_uart_readl(struct uart_port *port,
- unsigned int offset)
-{
- return bcm_readl(port->membase + offset);
-}
-
-static inline void bcm_uart_writel(struct uart_port *port,
- unsigned int value, unsigned int offset)
-{
- bcm_writel(value, port->membase + offset);
-}
-
-/*
- * serial core request to check if uart tx fifo is empty
- */
-static unsigned int bcm_uart_tx_empty(struct uart_port *port)
-{
- unsigned int val;
-
- val = bcm_uart_readl(port, UART_IR_REG);
- return (val & UART_IR_STAT(UART_IR_TXEMPTY)) ? 1 : 0;
-}
-
-/*
- * serial core request to set RTS and DTR pin state and loopback mode
- */
-static void bcm_uart_set_mctrl(struct uart_port *port, unsigned int mctrl)
-{
- unsigned int val;
-
- val = bcm_uart_readl(port, UART_MCTL_REG);
- val &= ~(UART_MCTL_DTR_MASK | UART_MCTL_RTS_MASK);
- /* invert of written value is reflected on the pin */
- if (!(mctrl & TIOCM_DTR))
- val |= UART_MCTL_DTR_MASK;
- if (!(mctrl & TIOCM_RTS))
- val |= UART_MCTL_RTS_MASK;
- bcm_uart_writel(port, val, UART_MCTL_REG);
-
- val = bcm_uart_readl(port, UART_CTL_REG);
- if (mctrl & TIOCM_LOOP)
- val |= UART_CTL_LOOPBACK_MASK;
- else
- val &= ~UART_CTL_LOOPBACK_MASK;
- bcm_uart_writel(port, val, UART_CTL_REG);
-}
-
-/*
- * serial core request to return RI, CTS, DCD and DSR pin state
- */
-static unsigned int bcm_uart_get_mctrl(struct uart_port *port)
-{
- unsigned int val, mctrl;
-
- mctrl = 0;
- val = bcm_uart_readl(port, UART_EXTINP_REG);
- if (val & UART_EXTINP_RI_MASK)
- mctrl |= TIOCM_RI;
- if (val & UART_EXTINP_CTS_MASK)
- mctrl |= TIOCM_CTS;
- if (val & UART_EXTINP_DCD_MASK)
- mctrl |= TIOCM_CD;
- if (val & UART_EXTINP_DSR_MASK)
- mctrl |= TIOCM_DSR;
- return mctrl;
-}
-
-/*
- * serial core request to disable tx ASAP (used for flow control)
- */
-static void bcm_uart_stop_tx(struct uart_port *port)
-{
- unsigned int val;
-
- val = bcm_uart_readl(port, UART_CTL_REG);
- val &= ~(UART_CTL_TXEN_MASK);
- bcm_uart_writel(port, val, UART_CTL_REG);
-
- val = bcm_uart_readl(port, UART_IR_REG);
- val &= ~UART_TX_INT_MASK;
- bcm_uart_writel(port, val, UART_IR_REG);
-}
-
-/*
- * serial core request to (re)enable tx
- */
-static void bcm_uart_start_tx(struct uart_port *port)
-{
- unsigned int val;
-
- val = bcm_uart_readl(port, UART_IR_REG);
- val |= UART_TX_INT_MASK;
- bcm_uart_writel(port, val, UART_IR_REG);
-
- val = bcm_uart_readl(port, UART_CTL_REG);
- val |= UART_CTL_TXEN_MASK;
- bcm_uart_writel(port, val, UART_CTL_REG);
-}
-
-/*
- * serial core request to stop rx, called before port shutdown
- */
-static void bcm_uart_stop_rx(struct uart_port *port)
-{
- unsigned int val;
-
- val = bcm_uart_readl(port, UART_IR_REG);
- val &= ~UART_RX_INT_MASK;
- bcm_uart_writel(port, val, UART_IR_REG);
-}
-
-/*
- * serial core request to enable modem status interrupt reporting
- */
-static void bcm_uart_enable_ms(struct uart_port *port)
-{
- unsigned int val;
-
- val = bcm_uart_readl(port, UART_IR_REG);
- val |= UART_IR_MASK(UART_IR_EXTIP);
- bcm_uart_writel(port, val, UART_IR_REG);
-}
-
-/*
- * serial core request to start/stop emitting break char
- */
-static void bcm_uart_break_ctl(struct uart_port *port, int ctl)
-{
- unsigned long flags;
- unsigned int val;
-
- spin_lock_irqsave(&port->lock, flags);
-
- val = bcm_uart_readl(port, UART_CTL_REG);
- if (ctl)
- val |= UART_CTL_XMITBRK_MASK;
- else
- val &= ~UART_CTL_XMITBRK_MASK;
- bcm_uart_writel(port, val, UART_CTL_REG);
-
- spin_unlock_irqrestore(&port->lock, flags);
-}
-
-/*
- * return port type in string format
- */
-static const char *bcm_uart_type(struct uart_port *port)
-{
- return (port->type == PORT_BCM63XX) ? "bcm63xx_uart" : NULL;
-}
-
-/*
- * read all chars in rx fifo and send them to core
- */
-static void bcm_uart_do_rx(struct uart_port *port)
-{
- struct tty_struct *tty;
- unsigned int max_count;
-
- /* limit number of char read in interrupt, should not be
- * higher than fifo size anyway since we're much faster than
- * serial port */
- max_count = 32;
- tty = port->info->port.tty;
- do {
- unsigned int iestat, c, cstat;
- char flag;
-
- /* get overrun/fifo empty information from ier
- * register */
- iestat = bcm_uart_readl(port, UART_IR_REG);
- if (!(iestat & UART_IR_STAT(UART_IR_RXNOTEMPTY)))
- break;
-
- cstat = c = bcm_uart_readl(port, UART_FIFO_REG);
- port->icount.rx++;
- flag = TTY_NORMAL;
- c &= 0xff;
-
- if (unlikely((cstat & UART_FIFO_ANYERR_MASK))) {
- /* do stats first */
- if (cstat & UART_FIFO_BRKDET_MASK) {
- port->icount.brk++;
- if (uart_handle_break(port))
- continue;
- }
-
- if (cstat & UART_FIFO_PARERR_MASK)
- port->icount.parity++;
- if (cstat & UART_FIFO_FRAMEERR_MASK)
- port->icount.frame++;
-
- /* update flag wrt read_status_mask */
- cstat &= port->read_status_mask;
- if (cstat & UART_FIFO_BRKDET_MASK)
- flag = TTY_BREAK;
- if (cstat & UART_FIFO_FRAMEERR_MASK)
- flag = TTY_FRAME;
- if (cstat & UART_FIFO_PARERR_MASK)
- flag = TTY_PARITY;
- }
-
- if (uart_handle_sysrq_char(port, c))
- continue;
-
- if (unlikely(iestat & UART_IR_STAT(UART_IR_RXOVER))) {
- port->icount.overrun++;
- tty_insert_flip_char(tty, 0, TTY_OVERRUN);
- }
-
- if ((cstat & port->ignore_status_mask) == 0)
- tty_insert_flip_char(tty, c, flag);
-
- } while (--max_count);
-
- tty_flip_buffer_push(tty);
-}
-
-/*
- * fill tx fifo with chars to send, stop when fifo is about to be full
- * or when all chars have been sent.
- */
-static void bcm_uart_do_tx(struct uart_port *port)
-{
- struct circ_buf *xmit;
- unsigned int val, max_count;
-
- if (port->x_char) {
- bcm_uart_writel(port, port->x_char, UART_FIFO_REG);
- port->icount.tx++;
- port->x_char = 0;
- return;
- }
-
- if (uart_tx_stopped(port)) {
- bcm_uart_stop_tx(port);
- return;
- }
-
- xmit = &port->info->xmit;
- if (uart_circ_empty(xmit))
- goto txq_empty;
-
- val = bcm_uart_readl(port, UART_MCTL_REG);
- val = (val & UART_MCTL_TXFIFOFILL_MASK) >> UART_MCTL_TXFIFOFILL_SHIFT;
- max_count = port->fifosize - val;
-
- while (max_count--) {
- unsigned int c;
-
- c = xmit->buf[xmit->tail];
- bcm_uart_writel(port, c, UART_FIFO_REG);
- xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
- port->icount.tx++;
- if (uart_circ_empty(xmit))
- break;
- }
-
- if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
- uart_write_wakeup(port);
-
- if (uart_circ_empty(xmit))
- goto txq_empty;
- return;
-
-txq_empty:
- /* nothing to send, disable transmit interrupt */
- val = bcm_uart_readl(port, UART_IR_REG);
- val &= ~UART_TX_INT_MASK;
- bcm_uart_writel(port, val, UART_IR_REG);
- return;
-}
-
-/*
- * process uart interrupt
- */
-static irqreturn_t bcm_uart_interrupt(int irq, void *dev_id)
-{
- struct uart_port *port;
- unsigned int irqstat;
-
- port = dev_id;
- spin_lock(&port->lock);
-
- irqstat = bcm_uart_readl(port, UART_IR_REG);
- if (irqstat & UART_RX_INT_STAT)
- bcm_uart_do_rx(port);
-
- if (irqstat & UART_TX_INT_STAT)
- bcm_uart_do_tx(port);
-
- if (irqstat & UART_IR_MASK(UART_IR_EXTIP)) {
- unsigned int estat;
-
- estat = bcm_uart_readl(port, UART_EXTINP_REG);
- if (estat & UART_EXTINP_IRSTAT(UART_EXTINP_IR_CTS))
- uart_handle_cts_change(port,
- estat & UART_EXTINP_CTS_MASK);
- if (estat & UART_EXTINP_IRSTAT(UART_EXTINP_IR_DCD))
- uart_handle_dcd_change(port,
- estat & UART_EXTINP_DCD_MASK);
- }
-
- spin_unlock(&port->lock);
- return IRQ_HANDLED;
-}
-
-/*
- * enable rx & tx operation on uart
- */
-static void bcm_uart_enable(struct uart_port *port)
-{
- unsigned int val;
-
- val = bcm_uart_readl(port, UART_CTL_REG);
- val |= (UART_CTL_BRGEN_MASK | UART_CTL_TXEN_MASK | UART_CTL_RXEN_MASK);
- bcm_uart_writel(port, val, UART_CTL_REG);
-}
-
-/*
- * disable rx & tx operation on uart
- */
-static void bcm_uart_disable(struct uart_port *port)
-{
- unsigned int val;
-
- val = bcm_uart_readl(port, UART_CTL_REG);
- val &= ~(UART_CTL_BRGEN_MASK | UART_CTL_TXEN_MASK |
- UART_CTL_RXEN_MASK);
- bcm_uart_writel(port, val, UART_CTL_REG);
-}
-
-/*
- * clear all unread data in rx fifo and unsent data in tx fifo
- */
-static void bcm_uart_flush(struct uart_port *port)
-{
- unsigned int val;
-
- /* empty rx and tx fifo */
- val = bcm_uart_readl(port, UART_CTL_REG);
- val |= UART_CTL_RSTRXFIFO_MASK | UART_CTL_RSTTXFIFO_MASK;
- bcm_uart_writel(port, val, UART_CTL_REG);
-
- /* read any pending char to make sure all irq status are
- * cleared */
- (void)bcm_uart_readl(port, UART_FIFO_REG);
-}
-
-/*
- * serial core request to initialize uart and start rx operation
- */
-static int bcm_uart_startup(struct uart_port *port)
-{
- unsigned int val;
- int ret;
-
- /* mask all irq and flush port */
- bcm_uart_disable(port);
- bcm_uart_writel(port, 0, UART_IR_REG);
- bcm_uart_flush(port);
-
- /* clear any pending external input interrupt */
- (void)bcm_uart_readl(port, UART_EXTINP_REG);
-
- /* set rx/tx fifo thresh to fifo half size */
- val = bcm_uart_readl(port, UART_MCTL_REG);
- val &= ~(UART_MCTL_RXFIFOTHRESH_MASK | UART_MCTL_TXFIFOTHRESH_MASK);
- val |= (port->fifosize / 2) << UART_MCTL_RXFIFOTHRESH_SHIFT;
- val |= (port->fifosize / 2) << UART_MCTL_TXFIFOTHRESH_SHIFT;
- bcm_uart_writel(port, val, UART_MCTL_REG);
-
- /* set rx fifo timeout to 1 char time */
- val = bcm_uart_readl(port, UART_CTL_REG);
- val &= ~UART_CTL_RXTMOUTCNT_MASK;
- val |= 1 << UART_CTL_RXTMOUTCNT_SHIFT;
- bcm_uart_writel(port, val, UART_CTL_REG);
-
- /* report any edge on dcd and cts */
- val = UART_EXTINP_INT_MASK;
- val |= UART_EXTINP_DCD_NOSENSE_MASK;
- val |= UART_EXTINP_CTS_NOSENSE_MASK;
- bcm_uart_writel(port, val, UART_EXTINP_REG);
-
- /* register irq and enable rx interrupts */
- ret = request_irq(port->irq, bcm_uart_interrupt, 0,
- bcm_uart_type(port), port);
- if (ret)
- return ret;
- bcm_uart_writel(port, UART_RX_INT_MASK, UART_IR_REG);
- bcm_uart_enable(port);
- return 0;
-}
-
-/*
- * serial core request to flush & disable uart
- */
-static void bcm_uart_shutdown(struct uart_port *port)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&port->lock, flags);
- bcm_uart_writel(port, 0, UART_IR_REG);
- spin_unlock_irqrestore(&port->lock, flags);
-
- bcm_uart_disable(port);
- bcm_uart_flush(port);
- free_irq(port->irq, port);
-}
-
-/*
- * serial core request to change current uart setting
- */
-static void bcm_uart_set_termios(struct uart_port *port,
- struct ktermios *new,
- struct ktermios *old)
-{
- unsigned int ctl, baud, quot, ier;
- unsigned long flags;
-
- spin_lock_irqsave(&port->lock, flags);
-
- /* disable uart while changing speed */
- bcm_uart_disable(port);
- bcm_uart_flush(port);
-
- /* update Control register */
- ctl = bcm_uart_readl(port, UART_CTL_REG);
- ctl &= ~UART_CTL_BITSPERSYM_MASK;
-
- switch (new->c_cflag & CSIZE) {
- case CS5:
- ctl |= (0 << UART_CTL_BITSPERSYM_SHIFT);
- break;
- case CS6:
- ctl |= (1 << UART_CTL_BITSPERSYM_SHIFT);
- break;
- case CS7:
- ctl |= (2 << UART_CTL_BITSPERSYM_SHIFT);
- break;
- default:
- ctl |= (3 << UART_CTL_BITSPERSYM_SHIFT);
- break;
- }
-
- ctl &= ~UART_CTL_STOPBITS_MASK;
- if (new->c_cflag & CSTOPB)
- ctl |= UART_CTL_STOPBITS_2;
- else
- ctl |= UART_CTL_STOPBITS_1;
-
- ctl &= ~(UART_CTL_RXPAREN_MASK | UART_CTL_TXPAREN_MASK);
- if (new->c_cflag & PARENB)
- ctl |= (UART_CTL_RXPAREN_MASK | UART_CTL_TXPAREN_MASK);
- ctl &= ~(UART_CTL_RXPAREVEN_MASK | UART_CTL_TXPAREVEN_MASK);
- if (new->c_cflag & PARODD)
- ctl |= (UART_CTL_RXPAREVEN_MASK | UART_CTL_TXPAREVEN_MASK);
- bcm_uart_writel(port, ctl, UART_CTL_REG);
-
- /* update Baudword register */
- baud = uart_get_baud_rate(port, new, old, 0, port->uartclk / 16);
- quot = uart_get_divisor(port, baud) - 1;
- bcm_uart_writel(port, quot, UART_BAUD_REG);
-
- /* update Interrupt register */
- ier = bcm_uart_readl(port, UART_IR_REG);
-
- ier &= ~UART_IR_MASK(UART_IR_EXTIP);
- if (UART_ENABLE_MS(port, new->c_cflag))
- ier |= UART_IR_MASK(UART_IR_EXTIP);
-
- bcm_uart_writel(port, ier, UART_IR_REG);
-
- /* update read/ignore mask */
- port->read_status_mask = UART_FIFO_VALID_MASK;
- if (new->c_iflag & INPCK) {
- port->read_status_mask |= UART_FIFO_FRAMEERR_MASK;
- port->read_status_mask |= UART_FIFO_PARERR_MASK;
- }
- if (new->c_iflag & (BRKINT))
- port->read_status_mask |= UART_FIFO_BRKDET_MASK;
-
- port->ignore_status_mask = 0;
- if (new->c_iflag & IGNPAR)
- port->ignore_status_mask |= UART_FIFO_PARERR_MASK;
- if (new->c_iflag & IGNBRK)
- port->ignore_status_mask |= UART_FIFO_BRKDET_MASK;
- if (!(new->c_cflag & CREAD))
- port->ignore_status_mask |= UART_FIFO_VALID_MASK;
-
- uart_update_timeout(port, new->c_cflag, baud);
- bcm_uart_enable(port);
- spin_unlock_irqrestore(&port->lock, flags);
-}
-
-/*
- * serial core request to claim uart iomem
- */
-static int bcm_uart_request_port(struct uart_port *port)
-{
- unsigned int size;
-
- size = RSET_UART_SIZE;
- if (!request_mem_region(port->mapbase, size, "bcm63xx")) {
- dev_err(port->dev, "Memory region busy\n");
- return -EBUSY;
- }
-
- port->membase = ioremap(port->mapbase, size);
- if (!port->membase) {
- dev_err(port->dev, "Unable to map registers\n");
- release_mem_region(port->mapbase, size);
- return -EBUSY;
- }
- return 0;
-}
-
-/*
- * serial core request to release uart iomem
- */
-static void bcm_uart_release_port(struct uart_port *port)
-{
- release_mem_region(port->mapbase, RSET_UART_SIZE);
- iounmap(port->membase);
-}
-
-/*
- * serial core request to do any port required autoconfiguration
- */
-static void bcm_uart_config_port(struct uart_port *port, int flags)
-{
- if (flags & UART_CONFIG_TYPE) {
- if (bcm_uart_request_port(port))
- return;
- port->type = PORT_BCM63XX;
- }
-}
-
-/*
- * serial core request to check that port information in serinfo are
- * suitable
- */
-static int bcm_uart_verify_port(struct uart_port *port,
- struct serial_struct *serinfo)
-{
- if (port->type != PORT_BCM63XX)
- return -EINVAL;
- if (port->irq != serinfo->irq)
- return -EINVAL;
- if (port->iotype != serinfo->io_type)
- return -EINVAL;
- if (port->mapbase != (unsigned long)serinfo->iomem_base)
- return -EINVAL;
- return 0;
-}
-
-/* serial core callbacks */
-static struct uart_ops bcm_uart_ops = {
- .tx_empty = bcm_uart_tx_empty,
- .get_mctrl = bcm_uart_get_mctrl,
- .set_mctrl = bcm_uart_set_mctrl,
- .start_tx = bcm_uart_start_tx,
- .stop_tx = bcm_uart_stop_tx,
- .stop_rx = bcm_uart_stop_rx,
- .enable_ms = bcm_uart_enable_ms,
- .break_ctl = bcm_uart_break_ctl,
- .startup = bcm_uart_startup,
- .shutdown = bcm_uart_shutdown,
- .set_termios = bcm_uart_set_termios,
- .type = bcm_uart_type,
- .release_port = bcm_uart_release_port,
- .request_port = bcm_uart_request_port,
- .config_port = bcm_uart_config_port,
- .verify_port = bcm_uart_verify_port,
-};
-
-
-
-#ifdef CONFIG_SERIAL_BCM63XX_CONSOLE
-static inline void wait_for_xmitr(struct uart_port *port)
-{
- unsigned int tmout;
-
- /* Wait up to 10ms for the character(s) to be sent. */
- tmout = 10000;
- while (--tmout) {
- unsigned int val;
-
- val = bcm_uart_readl(port, UART_IR_REG);
- if (val & UART_IR_STAT(UART_IR_TXEMPTY))
- break;
- udelay(1);
- }
-
- /* Wait up to 1s for flow control if necessary */
- if (port->flags & UPF_CONS_FLOW) {
- tmout = 1000000;
- while (--tmout) {
- unsigned int val;
-
- val = bcm_uart_readl(port, UART_EXTINP_REG);
- if (val & UART_EXTINP_CTS_MASK)
- break;
- udelay(1);
- }
- }
-}
-
-/*
- * output given char
- */
-static void bcm_console_putchar(struct uart_port *port, int ch)
-{
- wait_for_xmitr(port);
- bcm_uart_writel(port, ch, UART_FIFO_REG);
-}
-
-/*
- * console core request to output given string
- */
-static void bcm_console_write(struct console *co, const char *s,
- unsigned int count)
-{
- struct uart_port *port;
- unsigned long flags;
- int locked;
-
- port = &ports[co->index];
-
- local_irq_save(flags);
- if (port->sysrq) {
- /* bcm_uart_interrupt() already took the lock */
- locked = 0;
- } else if (oops_in_progress) {
- locked = spin_trylock(&port->lock);
- } else {
- spin_lock(&port->lock);
- locked = 1;
- }
-
- /* call helper to deal with \r\n */
- uart_console_write(port, s, count, bcm_console_putchar);
-
- /* and wait for char to be transmitted */
- wait_for_xmitr(port);
-
- if (locked)
- spin_unlock(&port->lock);
- local_irq_restore(flags);
-}
-
-/*
- * console core request to setup given console, find matching uart
- * port and setup it.
- */
-static int bcm_console_setup(struct console *co, char *options)
-{
- struct uart_port *port;
- int baud = 9600;
- int bits = 8;
- int parity = 'n';
- int flow = 'n';
-
- if (co->index < 0 || co->index >= BCM63XX_NR_UARTS)
- return -EINVAL;
- port = &ports[co->index];
- if (!port->membase)
- 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 bcm_uart_driver;
-
-static struct console bcm63xx_console = {
- .name = "ttyS",
- .write = bcm_console_write,
- .device = uart_console_device,
- .setup = bcm_console_setup,
- .flags = CON_PRINTBUFFER,
- .index = -1,
- .data = &bcm_uart_driver,
-};
-
-static int __init bcm63xx_console_init(void)
-{
- register_console(&bcm63xx_console);
- return 0;
-}
-
-console_initcall(bcm63xx_console_init);
-
-#define BCM63XX_CONSOLE &bcm63xx_console
-#else
-#define BCM63XX_CONSOLE NULL
-#endif /* CONFIG_SERIAL_BCM63XX_CONSOLE */
-
-static struct uart_driver bcm_uart_driver = {
- .owner = THIS_MODULE,
- .driver_name = "bcm63xx_uart",
- .dev_name = "ttyS",
- .major = TTY_MAJOR,
- .minor = 64,
- .nr = 1,
- .cons = BCM63XX_CONSOLE,
-};
-
-/*
- * platform driver probe/remove callback
- */
-static int __devinit bcm_uart_probe(struct platform_device *pdev)
-{
- struct resource *res_mem, *res_irq;
- struct uart_port *port;
- struct clk *clk;
- int ret;
-
- if (pdev->id < 0 || pdev->id >= BCM63XX_NR_UARTS)
- return -EINVAL;
-
- if (ports[pdev->id].membase)
- return -EBUSY;
-
- res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!res_mem)
- return -ENODEV;
-
- res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
- if (!res_irq)
- return -ENODEV;
-
- clk = clk_get(&pdev->dev, "periph");
- if (IS_ERR(clk))
- return -ENODEV;
-
- port = &ports[pdev->id];
- memset(port, 0, sizeof(*port));
- port->iotype = UPIO_MEM;
- port->mapbase = res_mem->start;
- port->irq = res_irq->start;
- port->ops = &bcm_uart_ops;
- port->flags = UPF_BOOT_AUTOCONF;
- port->dev = &pdev->dev;
- port->fifosize = 16;
- port->uartclk = clk_get_rate(clk) / 2;
- clk_put(clk);
-
- ret = uart_add_one_port(&bcm_uart_driver, port);
- if (ret) {
- kfree(port);
- return ret;
- }
- platform_set_drvdata(pdev, port);
- return 0;
-}
-
-static int __devexit bcm_uart_remove(struct platform_device *pdev)
-{
- struct uart_port *port;
-
- port = platform_get_drvdata(pdev);
- uart_remove_one_port(&bcm_uart_driver, port);
- platform_set_drvdata(pdev, NULL);
- /* mark port as free */
- ports[pdev->id].membase = 0;
- return 0;
-}
-
-/*
- * platform driver stuff
- */
-static struct platform_driver bcm_uart_platform_driver = {
- .probe = bcm_uart_probe,
- .remove = __devexit_p(bcm_uart_remove),
- .driver = {
- .owner = THIS_MODULE,
- .name = "bcm63xx_uart",
- },
-};
-
-static int __init bcm_uart_init(void)
-{
- int ret;
-
- ret = uart_register_driver(&bcm_uart_driver);
- if (ret)
- return ret;
-
- ret = platform_driver_register(&bcm_uart_platform_driver);
- if (ret)
- uart_unregister_driver(&bcm_uart_driver);
-
- return ret;
-}
-
-static void __exit bcm_uart_exit(void)
-{
- platform_driver_unregister(&bcm_uart_platform_driver);
- uart_unregister_driver(&bcm_uart_driver);
-}
-
-module_init(bcm_uart_init);
-module_exit(bcm_uart_exit);
-
-MODULE_AUTHOR("Maxime Bizon <mbizon@freebox.fr>");
-MODULE_DESCRIPTION("Broadcom 63<xx integrated uart driver");
-MODULE_LICENSE("GPL");
projects / openwrt / svn-archive / archive.git / blobdiff