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path: root/drivers/serial/serial_txx9.c
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Diffstat (limited to 'drivers/serial/serial_txx9.c')
-rw-r--r--drivers/serial/serial_txx9.c118
1 files changed, 91 insertions, 27 deletions
diff --git a/drivers/serial/serial_txx9.c b/drivers/serial/serial_txx9.c
index 49afadbe461b..f10c86d60b64 100644
--- a/drivers/serial/serial_txx9.c
+++ b/drivers/serial/serial_txx9.c
@@ -31,6 +31,8 @@
* 1.01 Set fifosize to make tx_empry called properly.
* Use standard uart_get_divisor.
* 1.02 Cleanup. (import 8250.c changes)
+ * 1.03 Fix low-latency mode. (import 8250.c changes)
+ * 1.04 Remove usage of deprecated functions, cleanup.
*/
#include <linux/config.h>
@@ -54,7 +56,7 @@
#include <asm/io.h>
#include <asm/irq.h>
-static char *serial_version = "1.02";
+static char *serial_version = "1.04";
static char *serial_name = "TX39/49 Serial driver";
#define PASS_LIMIT 256
@@ -86,9 +88,9 @@ static char *serial_name = "TX39/49 Serial driver";
*/
#ifdef ENABLE_SERIAL_TXX9_PCI
#define NR_PCI_BOARDS 4
-#define UART_NR (2 + NR_PCI_BOARDS)
+#define UART_NR (4 + NR_PCI_BOARDS)
#else
-#define UART_NR 2
+#define UART_NR 4
#endif
struct uart_txx9_port {
@@ -304,8 +306,11 @@ receive_chars(struct uart_txx9_port *up, unsigned int *status, struct pt_regs *r
/* The following is not allowed by the tty layer and
unsafe. It should be fixed ASAP */
if (unlikely(tty->flip.count >= TTY_FLIPBUF_SIZE)) {
- if(tty->low_latency)
+ if (tty->low_latency) {
+ spin_unlock(&up->port.lock);
tty_flip_buffer_push(tty);
+ spin_lock(&up->port.lock);
+ }
/* If this failed then we will throw away the
bytes but must do so to clear interrupts */
}
@@ -356,7 +361,9 @@ receive_chars(struct uart_txx9_port *up, unsigned int *status, struct pt_regs *r
ignore_char:
disr = sio_in(up, TXX9_SIDISR);
} while (!(disr & TXX9_SIDISR_UVALID) && (max_count-- > 0));
+ spin_unlock(&up->port.lock);
tty_flip_buffer_push(tty);
+ spin_lock(&up->port.lock);
*status = disr;
}
@@ -667,17 +674,8 @@ serial_txx9_pm(struct uart_port *port, unsigned int state,
unsigned int oldstate)
{
struct uart_txx9_port *up = (struct uart_txx9_port *)port;
- if (state) {
- /* sleep */
-
- if (up->pm)
- up->pm(port, state, oldstate);
- } else {
- /* wake */
-
- if (up->pm)
- up->pm(port, state, oldstate);
- }
+ if (up->pm)
+ up->pm(port, state, oldstate);
}
static int serial_txx9_request_resource(struct uart_txx9_port *up)
@@ -979,14 +977,6 @@ static int __init serial_txx9_console_init(void)
}
console_initcall(serial_txx9_console_init);
-static int __init serial_txx9_late_console_init(void)
-{
- if (!(serial_txx9_console.flags & CON_ENABLED))
- register_console(&serial_txx9_console);
- return 0;
-}
-late_initcall(serial_txx9_late_console_init);
-
#define SERIAL_TXX9_CONSOLE &serial_txx9_console
#else
#define SERIAL_TXX9_CONSOLE NULL
@@ -1039,6 +1029,73 @@ static void serial_txx9_resume_port(int line)
uart_resume_port(&serial_txx9_reg, &serial_txx9_ports[line].port);
}
+static DECLARE_MUTEX(serial_txx9_sem);
+
+/**
+ * serial_txx9_register_port - register a serial port
+ * @port: serial port template
+ *
+ * Configure the serial port specified by the request.
+ *
+ * The port is then probed and if necessary the IRQ is autodetected
+ * If this fails an error is returned.
+ *
+ * On success the port is ready to use and the line number is returned.
+ */
+static int __devinit serial_txx9_register_port(struct uart_port *port)
+{
+ int i;
+ struct uart_txx9_port *uart;
+ int ret = -ENOSPC;
+
+ down(&serial_txx9_sem);
+ for (i = 0; i < UART_NR; i++) {
+ uart = &serial_txx9_ports[i];
+ if (uart->port.type == PORT_UNKNOWN)
+ break;
+ }
+ if (i < UART_NR) {
+ uart_remove_one_port(&serial_txx9_reg, &uart->port);
+ uart->port.iobase = port->iobase;
+ uart->port.membase = port->membase;
+ uart->port.irq = port->irq;
+ uart->port.uartclk = port->uartclk;
+ uart->port.iotype = port->iotype;
+ uart->port.flags = port->flags | UPF_BOOT_AUTOCONF;
+ uart->port.mapbase = port->mapbase;
+ if (port->dev)
+ uart->port.dev = port->dev;
+ ret = uart_add_one_port(&serial_txx9_reg, &uart->port);
+ if (ret == 0)
+ ret = uart->port.line;
+ }
+ up(&serial_txx9_sem);
+ return ret;
+}
+
+/**
+ * serial_txx9_unregister_port - remove a txx9 serial port at runtime
+ * @line: serial line number
+ *
+ * Remove one serial port. This may not be called from interrupt
+ * context. We hand the port back to the our control.
+ */
+static void __devexit serial_txx9_unregister_port(int line)
+{
+ struct uart_txx9_port *uart = &serial_txx9_ports[line];
+
+ down(&serial_txx9_sem);
+ uart_remove_one_port(&serial_txx9_reg, &uart->port);
+ uart->port.flags = 0;
+ uart->port.type = PORT_UNKNOWN;
+ uart->port.iobase = 0;
+ uart->port.mapbase = 0;
+ uart->port.membase = 0;
+ uart->port.dev = NULL;
+ uart_add_one_port(&serial_txx9_reg, &uart->port);
+ up(&serial_txx9_sem);
+}
+
/*
* Probe one serial board. Unfortunately, there is no rhyme nor reason
* to the arrangement of serial ports on a PCI card.
@@ -1056,13 +1113,13 @@ pciserial_txx9_init_one(struct pci_dev *dev, const struct pci_device_id *ent)
memset(&port, 0, sizeof(port));
port.ops = &serial_txx9_pops;
- port.flags |= UPF_BOOT_AUTOCONF; /* uart_ops.config_port will be called */
port.flags |= UPF_TXX9_HAVE_CTS_LINE;
port.uartclk = 66670000;
port.irq = dev->irq;
port.iotype = UPIO_PORT;
port.iobase = pci_resource_start(dev, 1);
- line = uart_register_port(&serial_txx9_reg, &port);
+ port.dev = &dev->dev;
+ line = serial_txx9_register_port(&port);
if (line < 0) {
printk(KERN_WARNING "Couldn't register serial port %s: %d\n", pci_name(dev), line);
}
@@ -1078,7 +1135,7 @@ static void __devexit pciserial_txx9_remove_one(struct pci_dev *dev)
pci_set_drvdata(dev, NULL);
if (line) {
- uart_unregister_port(&serial_txx9_reg, line);
+ serial_txx9_unregister_port(line);
pci_disable_device(dev);
}
}
@@ -1089,6 +1146,8 @@ static int pciserial_txx9_suspend_one(struct pci_dev *dev, pm_message_t state)
if (line)
serial_txx9_suspend_port(line);
+ pci_save_state(dev);
+ pci_set_power_state(dev, pci_choose_state(dev, state));
return 0;
}
@@ -1096,8 +1155,13 @@ static int pciserial_txx9_resume_one(struct pci_dev *dev)
{
int line = (int)(long)pci_get_drvdata(dev);
- if (line)
+ pci_set_power_state(dev, PCI_D0);
+ pci_restore_state(dev);
+
+ if (line) {
+ pci_enable_device(dev);
serial_txx9_resume_port(line);
+ }
return 0;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-05 12:47:50 +0000