create mode 100644 drivers/serial/bcm63xx_uart.c
create mode 100644 include/asm-mips/mach-bcm63xx/bcm63xx_dev_uart.h
---- a/arch/mips/bcm63xx/Makefile
-+++ b/arch/mips/bcm63xx/Makefile
-@@ -1,2 +1,3 @@
- obj-y += clk.o cpu.o cs.o gpio.o irq.o prom.o setup.o timer.o
-+obj-y += dev-uart.o
- obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
---- /dev/null
-+++ b/arch/mips/bcm63xx/dev-uart.c
-@@ -0,0 +1,41 @@
-+/*
-+ * This file is subject to the terms and conditions of the GNU General Public
-+ * License. See the file "COPYING" in the main directory of this archive
-+ * for more details.
-+ *
-+ * Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
-+ */
-+
-+#include <linux/init.h>
-+#include <linux/kernel.h>
-+#include <linux/platform_device.h>
-+#include <bcm63xx_cpu.h>
-+#include <bcm63xx_dev_uart.h>
-+
-+static struct resource uart_resources[] = {
-+ {
-+ .start = -1, /* filled at runtime */
-+ .end = -1, /* filled at runtime */
-+ .flags = IORESOURCE_MEM,
-+ },
-+ {
-+ .start = -1, /* filled at runtime */
-+ .flags = IORESOURCE_IRQ,
-+ },
-+};
-+
-+static struct platform_device bcm63xx_uart_device = {
-+ .name = "bcm63xx_uart",
-+ .id = 0,
-+ .num_resources = ARRAY_SIZE(uart_resources),
-+ .resource = uart_resources,
-+};
-+
-+int __init bcm63xx_uart_register(void)
-+{
-+ uart_resources[0].start = bcm63xx_regset_address(RSET_UART0);
-+ uart_resources[0].end = uart_resources[0].start;
-+ uart_resources[0].end += RSET_UART_SIZE - 1;
-+ uart_resources[1].start = bcm63xx_get_irq_number(IRQ_UART0);
-+ return platform_device_register(&bcm63xx_uart_device);
-+}
--- a/drivers/serial/Kconfig
+++ b/drivers/serial/Kconfig
@@ -1421,4 +1421,23 @@ config SPORT_BAUD_RATE
obj-$(CONFIG_SERIAL_BFIN) += bfin_5xx.o
obj-$(CONFIG_SERIAL_BFIN_SPORT) += bfin_sport_uart.o
obj-$(CONFIG_SERIAL_SAMSUNG) += samsung.o
---- /dev/null
-+++ b/drivers/serial/bcm63xx_uart.c
-@@ -0,0 +1,890 @@
-+/*
-+ * 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");
---- /dev/null
-+++ b/include/asm-mips/mach-bcm63xx/bcm63xx_dev_uart.h
-@@ -0,0 +1,6 @@
-+#ifndef BCM63XX_DEV_UART_H_
-+#define BCM63XX_DEV_UART_H_
-+
-+int bcm63xx_uart_register(void);
-+
-+#endif /* BCM63XX_DEV_UART_H_ */
--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -155,6 +155,8 @@
projects / openwrt.git / blobdiff