Fedora kernel-2.6.17-1.2142_FC4 patched with stable patch-2.6.17.4-vs2.0.2-rc26.diff

[linux-2.6.git] / drivers / serial / mux.c

diff --git a/drivers/serial/mux.c b/drivers/serial/mux.c
index dadd7e1..64c0e89 100644 (file)
--- a/drivers/serial/mux.c
+++ b/drivers/serial/mux.c
@@ -27,6 +27,7 @@
 #include <linux/delay.h> /* for udelay */
 #include <linux/device.h>
 #include <asm/io.h>
+#include <asm/irq.h>
 #include <asm/parisc-device.h>
 
 #ifdef CONFIG_MAGIC_SYSRQ
@@ -50,7 +51,7 @@
 #define MUX_BREAK(status) ((status & 0xF000) == 0x2000)
 
 #define MUX_NR 256
-static unsigned int port_cnt = 0;
+static unsigned int port_cnt __read_mostly;
 static struct uart_port mux_ports[MUX_NR];
 
 static struct uart_driver mux_driver = {
@@ -64,8 +65,8 @@ static struct uart_driver mux_driver = {
 
 static struct timer_list mux_timer;
 
-#define UART_PUT_CHAR(p, c) __raw_writel((c), (unsigned long)(p)->membase + IO_DATA_REG_OFFSET)
-#define UART_GET_FIFO_CNT(p) __raw_readl((unsigned long)(p)->membase + IO_DCOUNT_REG_OFFSET)
+#define UART_PUT_CHAR(p, c) __raw_writel((c), (p)->membase + IO_DATA_REG_OFFSET)
+#define UART_GET_FIFO_CNT(p) __raw_readl((p)->membase + IO_DCOUNT_REG_OFFSET)
 #define GET_MUX_PORTS(iodc_data) ((((iodc_data)[4] & 0xf0) >> 4) * 8) + 8
 
 /**
@@ -78,10 +79,7 @@ static struct timer_list mux_timer;
  */
 static unsigned int mux_tx_empty(struct uart_port *port)
 {
-       unsigned int cnt = __raw_readl((unsigned long)port->membase 
-                               + IO_DCOUNT_REG_OFFSET);
-
-       return cnt ? 0 : TIOCSER_TEMT;
+       return UART_GET_FIFO_CNT(port) ? 0 : TIOCSER_TEMT;
 } 
 
 /**
@@ -111,22 +109,20 @@ static unsigned int mux_get_mctrl(struct uart_port *port)
 /**
  * mux_stop_tx - Stop transmitting characters.
  * @port: Ptr to the uart_port.
- * @tty_stop: tty layer issue this command?
  *
  * The Serial MUX does not support this function.
  */
-static void mux_stop_tx(struct uart_port *port, unsigned int tty_stop)
+static void mux_stop_tx(struct uart_port *port)
 {
 }
 
 /**
  * mux_start_tx - Start transmitting characters.
  * @port: Ptr to the uart_port.
- * @tty_start: tty layer issue this command?
  *
  * The Serial Mux does not support this function.
  */
-static void mux_start_tx(struct uart_port *port, unsigned int tty_start)
+static void mux_start_tx(struct uart_port *port)
 {
 }
 
@@ -181,7 +177,7 @@ static void mux_write(struct uart_port *port)
        }
 
        if(uart_circ_empty(xmit) || uart_tx_stopped(port)) {
-               mux_stop_tx(port, 0);
+               mux_stop_tx(port);
                return;
        }
 
@@ -202,7 +198,7 @@ static void mux_write(struct uart_port *port)
                uart_write_wakeup(port);
 
        if (uart_circ_empty(xmit))
-               mux_stop_tx(port, 0);
+               mux_stop_tx(port);
 }
 
 /**
@@ -219,8 +215,7 @@ static void mux_read(struct uart_port *port)
        __u32 start_count = port->icount.rx;
 
        while(1) {
-               data = __raw_readl((unsigned long)port->membase
-                                               + IO_DATA_REG_OFFSET);
+               data = __raw_readl(port->membase + IO_DATA_REG_OFFSET);
 
                if (MUX_STATUS(data))
                        continue;
@@ -228,11 +223,6 @@ static void mux_read(struct uart_port *port)
                if (MUX_EOFIFO(data))
                        break;
 
-               if (tty->flip.count >= TTY_FLIPBUF_SIZE)
-                       continue;
-
-               *tty->flip.char_buf_ptr = data & 0xffu;
-               *tty->flip.flag_buf_ptr = TTY_NORMAL;
                port->icount.rx++;
 
                if (MUX_BREAK(data)) {
@@ -244,9 +234,7 @@ static void mux_read(struct uart_port *port)
                if (uart_handle_sysrq_char(port, data & 0xffu, NULL))
                        continue;
 
-               tty->flip.flag_buf_ptr++;
-               tty->flip.char_buf_ptr++;
-               tty->flip.count++;
+               tty_insert_flip_char(tty, data & 0xFF, TTY_NORMAL);
        }
        
        if (start_count != port->icount.rx) {
@@ -446,7 +434,7 @@ static int __init mux_probe(struct parisc_device *dev)
        unsigned long bytecnt;
        struct uart_port *port;
 
-       status = pdc_iodc_read(&bytecnt, dev->hpa, 0, iodc_data, 32);
+       status = pdc_iodc_read(&bytecnt, dev->hpa.start, 0, iodc_data, 32);
        if(status != PDC_OK) {
                printk(KERN_ERR "Serial mux: Unable to read IODC.\n");
                return 1;
@@ -471,16 +459,25 @@ static int __init mux_probe(struct parisc_device *dev)
        for(i = 0; i < ports; ++i, ++port_cnt) {
                port = &mux_ports[port_cnt];
                port->iobase    = 0;
-               port->mapbase   = dev->hpa + MUX_OFFSET + (i * MUX_LINE_OFFSET);
-               port->membase   = ioremap(port->mapbase, MUX_LINE_OFFSET);
-               port->iotype    = SERIAL_IO_MEM;
+               port->mapbase   = dev->hpa.start + MUX_OFFSET +
+                                               (i * MUX_LINE_OFFSET);
+               port->membase   = ioremap_nocache(port->mapbase, MUX_LINE_OFFSET);
+               port->iotype    = UPIO_MEM;
                port->type      = PORT_MUX;
-               port->irq       = SERIAL_IRQ_NONE;
+               port->irq       = NO_IRQ;
                port->uartclk   = 0;
                port->fifosize  = MUX_FIFO_SIZE;
                port->ops       = &mux_pops;
                port->flags     = UPF_BOOT_AUTOCONF;
                port->line      = port_cnt;
+
+               /* The port->timeout needs to match what is present in
+                * uart_wait_until_sent in serial_core.c.  Otherwise
+                * the time spent in msleep_interruptable will be very
+                * long, causing the appearance of a console hang.
+                */
+               port->timeout   = HZ / 50;
+               spin_lock_init(&port->lock);
                status = uart_add_one_port(&mux_driver, port);
                BUG_ON(status);
        }
@@ -499,7 +496,7 @@ static struct parisc_device_id mux_tbl[] = {
 MODULE_DEVICE_TABLE(parisc, mux_tbl);
 
 static struct parisc_driver serial_mux_driver = {
-       .name =         "Serial MUX",
+       .name =         "serial_mux",
        .id_table =     mux_tbl,
        .probe =        mux_probe,
 };