* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
- * $Id: amba.c,v 1.41 2002/07/28 10:03:27 rmk Exp $
- *
* This is a generic driver for ARM AMBA-type serial ports. They
* have a lot of 16550-like features, but are not register compatible.
* Note that although they do have CTS, DCD and DSR inputs, they do
* required, these have to be supplied via some other means (eg, GPIO)
* and hooked into this driver.
*/
-#include <linux/config.h>
#if defined(CONFIG_SERIAL_AMBA_PL011_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
#define SUPPORT_SYSRQ
#include <linux/tty_flip.h>
#include <linux/serial_core.h>
#include <linux/serial.h>
+#include <linux/amba/bus.h>
+#include <linux/amba/serial.h>
+#include <linux/clk.h>
#include <asm/io.h>
#include <asm/sizes.h>
-#include <asm/hardware/amba.h>
-#include <asm/hardware/clock.h>
-#include <asm/hardware/amba_serial.h>
#define UART_NR 14
writew(uap->im, uap->port.membase + UART011_IMSC);
}
-static void
-#ifdef SUPPORT_SYSRQ
-pl011_rx_chars(struct uart_amba_port *uap, struct pt_regs *regs)
-#else
-pl011_rx_chars(struct uart_amba_port *uap)
-#endif
+static void pl011_rx_chars(struct uart_amba_port *uap)
{
- struct tty_struct *tty = uap->port.info->tty;
+ struct tty_struct *tty = uap->port.info->port.tty;
unsigned int status, ch, flag, max_count = 256;
status = readw(uap->port.membase + UART01x_FR);
while ((status & UART01x_FR_RXFE) == 0 && max_count--) {
- if (tty->flip.count >= TTY_FLIPBUF_SIZE) {
- if (tty->low_latency)
- tty_flip_buffer_push(tty);
- /*
- * If this failed then we will throw away the
- * bytes but must do so to clear interrupts
- */
- }
-
ch = readw(uap->port.membase + UART01x_DR) | UART_DUMMY_DR_RX;
flag = TTY_NORMAL;
uap->port.icount.rx++;
flag = TTY_FRAME;
}
- if (uart_handle_sysrq_char(&uap->port, ch & 255, regs))
+ if (uart_handle_sysrq_char(&uap->port, ch & 255))
goto ignore_char;
uart_insert_char(&uap->port, ch, UART011_DR_OE, ch, flag);
ignore_char:
status = readw(uap->port.membase + UART01x_FR);
}
+ spin_unlock(&uap->port.lock);
tty_flip_buffer_push(tty);
- return;
+ spin_lock(&uap->port.lock);
}
static void pl011_tx_chars(struct uart_amba_port *uap)
wake_up_interruptible(&uap->port.info->delta_msr_wait);
}
-static irqreturn_t pl011_int(int irq, void *dev_id, struct pt_regs *regs)
+static irqreturn_t pl011_int(int irq, void *dev_id)
{
struct uart_amba_port *uap = dev_id;
unsigned int status, pass_counter = AMBA_ISR_PASS_LIMIT;
uap->port.membase + UART011_ICR);
if (status & (UART011_RTIS|UART011_RXIS))
-#ifdef SUPPORT_SYSRQ
- pl011_rx_chars(uap, regs);
-#else
pl011_rx_chars(uap);
-#endif
if (status & (UART011_DSRMIS|UART011_DCDMIS|
UART011_CTSMIS|UART011_RIMIS))
pl011_modem_status(uap);
unsigned int result = 0;
unsigned int status = readw(uap->port.membase + UART01x_FR);
-#define BIT(uartbit, tiocmbit) \
+#define TIOCMBIT(uartbit, tiocmbit) \
if (status & uartbit) \
result |= tiocmbit
- BIT(UART01x_FR_DCD, TIOCM_CAR);
- BIT(UART01x_FR_DSR, TIOCM_DSR);
- BIT(UART01x_FR_CTS, TIOCM_CTS);
- BIT(UART011_FR_RI, TIOCM_RNG);
-#undef BIT
+ TIOCMBIT(UART01x_FR_DCD, TIOCM_CAR);
+ TIOCMBIT(UART01x_FR_DSR, TIOCM_DSR);
+ TIOCMBIT(UART01x_FR_CTS, TIOCM_CTS);
+ TIOCMBIT(UART011_FR_RI, TIOCM_RNG);
+#undef TIOCMBIT
return result;
}
cr = readw(uap->port.membase + UART011_CR);
-#define BIT(tiocmbit, uartbit) \
+#define TIOCMBIT(tiocmbit, uartbit) \
if (mctrl & tiocmbit) \
cr |= uartbit; \
else \
cr &= ~uartbit
- BIT(TIOCM_RTS, UART011_CR_RTS);
- BIT(TIOCM_DTR, UART011_CR_DTR);
- BIT(TIOCM_OUT1, UART011_CR_OUT1);
- BIT(TIOCM_OUT2, UART011_CR_OUT2);
- BIT(TIOCM_LOOP, UART011_CR_LBE);
-#undef BIT
+ TIOCMBIT(TIOCM_RTS, UART011_CR_RTS);
+ TIOCMBIT(TIOCM_DTR, UART011_CR_DTR);
+ TIOCMBIT(TIOCM_OUT1, UART011_CR_OUT1);
+ TIOCMBIT(TIOCM_OUT2, UART011_CR_OUT2);
+ TIOCMBIT(TIOCM_LOOP, UART011_CR_LBE);
+#undef TIOCMBIT
writew(cr, uap->port.membase + UART011_CR);
}
spin_unlock_irqrestore(&uap->port.lock, flags);
}
+#ifdef CONFIG_CONSOLE_POLL
+static int pl010_get_poll_char(struct uart_port *port)
+{
+ struct uart_amba_port *uap = (struct uart_amba_port *)port;
+ unsigned int status;
+
+ do {
+ status = readw(uap->port.membase + UART01x_FR);
+ } while (status & UART01x_FR_RXFE);
+
+ return readw(uap->port.membase + UART01x_DR);
+}
+
+static void pl010_put_poll_char(struct uart_port *port,
+ unsigned char ch)
+{
+ struct uart_amba_port *uap = (struct uart_amba_port *)port;
+
+ while (readw(uap->port.membase + UART01x_FR) & UART01x_FR_TXFF)
+ barrier();
+
+ writew(ch, uap->port.membase + UART01x_DR);
+}
+
+#endif /* CONFIG_CONSOLE_POLL */
+
static int pl011_startup(struct uart_port *port)
{
struct uart_amba_port *uap = (struct uart_amba_port *)port;
}
static void
-pl011_set_termios(struct uart_port *port, struct termios *termios,
- struct termios *old)
+pl011_set_termios(struct uart_port *port, struct ktermios *termios,
+ struct ktermios *old)
{
unsigned int lcr_h, old_cr;
unsigned long flags;
int ret = 0;
if (ser->type != PORT_UNKNOWN && ser->type != PORT_AMBA)
ret = -EINVAL;
- if (ser->irq < 0 || ser->irq >= NR_IRQS)
+ if (ser->irq < 0 || ser->irq >= nr_irqs)
ret = -EINVAL;
if (ser->baud_base < 9600)
ret = -EINVAL;
.request_port = pl010_request_port,
.config_port = pl010_config_port,
.verify_port = pl010_verify_port,
+#ifdef CONFIG_CONSOLE_POLL
+ .poll_get_char = pl010_get_poll_char,
+ .poll_put_char = pl010_put_poll_char,
+#endif
};
static struct uart_amba_port *amba_ports[UART_NR];
#ifdef CONFIG_SERIAL_AMBA_PL011_CONSOLE
-static inline void
-pl011_console_write_char(struct uart_amba_port *uap, char ch)
+static void pl011_console_putchar(struct uart_port *port, int ch)
{
- unsigned int status;
+ struct uart_amba_port *uap = (struct uart_amba_port *)port;
- do {
- status = readw(uap->port.membase + UART01x_FR);
- } while (status & UART01x_FR_TXFF);
+ while (readw(uap->port.membase + UART01x_FR) & UART01x_FR_TXFF)
+ barrier();
writew(ch, uap->port.membase + UART01x_DR);
}
{
struct uart_amba_port *uap = amba_ports[co->index];
unsigned int status, old_cr, new_cr;
- int i;
clk_enable(uap->clk);
new_cr |= UART01x_CR_UARTEN | UART011_CR_TXE;
writew(new_cr, uap->port.membase + UART011_CR);
- /*
- * Now, do each character
- */
- for (i = 0; i < count; i++) {
- pl011_console_write_char(uap, s[i]);
- if (s[i] == '\n')
- pl011_console_write_char(uap, '\r');
- }
+ uart_console_write(&uap->port, s, count, pl011_console_putchar);
/*
* Finally, wait for transmitter to become empty
if (co->index >= UART_NR)
co->index = 0;
uap = amba_ports[co->index];
+ if (!uap)
+ return -ENODEV;
uap->port.uartclk = clk_get_rate(uap->clk);
goto out;
}
- uap = kmalloc(sizeof(struct uart_amba_port), GFP_KERNEL);
+ uap = kzalloc(sizeof(struct uart_amba_port), GFP_KERNEL);
if (uap == NULL) {
ret = -ENOMEM;
goto out;
goto free;
}
- memset(uap, 0, sizeof(struct uart_amba_port));
- uap->clk = clk_get(&dev->dev, "UARTCLK");
+ uap->clk = clk_get(&dev->dev, NULL);
if (IS_ERR(uap->clk)) {
ret = PTR_ERR(uap->clk);
goto unmap;
}
- ret = clk_use(uap->clk);
- if (ret)
- goto putclk;
-
uap->port.dev = &dev->dev;
uap->port.mapbase = dev->res.start;
uap->port.membase = base;
if (ret) {
amba_set_drvdata(dev, NULL);
amba_ports[i] = NULL;
- clk_unuse(uap->clk);
- putclk:
clk_put(uap->clk);
unmap:
iounmap(base);
amba_ports[i] = NULL;
iounmap(uap->port.membase);
- clk_unuse(uap->clk);
clk_put(uap->clk);
kfree(uap);
return 0;
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff