* grub-core/term/ns8250.c (do_real_config): Set port->broken to 0.
(serial_hw_put): Wait based on real time rather than port reads. Don't roken ports. * include/grub/serial.h (grub_serial_port): New field broken.
This commit is contained in:
parent
5f8b440b6b
commit
24977b4451
3 changed files with 31 additions and 5 deletions
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@ -1,3 +1,10 @@
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2010-10-16 Vladimir Serbinenko <phcoder@gmail.com>
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* grub-core/term/ns8250.c (do_real_config): Set port->broken to 0.
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(serial_hw_put): Wait based on real time rather than port reads. Don't
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roken ports.
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* include/grub/serial.h (grub_serial_port): New field broken.
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2010-10-16 Robert Millan <rmh@gnu.org>
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2010-10-16 Robert Millan <rmh@gnu.org>
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* grub-core/kern/emu/misc.c
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* grub-core/kern/emu/misc.c
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@ -23,6 +23,7 @@
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#include <grub/misc.h>
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#include <grub/misc.h>
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#include <grub/cpu/io.h>
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#include <grub/cpu/io.h>
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#include <grub/mm.h>
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#include <grub/mm.h>
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#include <grub/time.h>
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#ifdef GRUB_MACHINE_PCBIOS
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#ifdef GRUB_MACHINE_PCBIOS
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#include <grub/machine/memory.h>
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#include <grub/machine/memory.h>
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@ -90,6 +91,8 @@ do_real_config (struct grub_serial_port *port)
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if (port->configured)
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if (port->configured)
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return;
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return;
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port->broken = 0;
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divisor = serial_get_divisor (port->config.speed);
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divisor = serial_get_divisor (port->config.speed);
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/* Turn off the interrupt. */
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/* Turn off the interrupt. */
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@ -145,17 +148,29 @@ serial_hw_fetch (struct grub_serial_port *port)
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static void
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static void
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serial_hw_put (struct grub_serial_port *port, const int c)
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serial_hw_put (struct grub_serial_port *port, const int c)
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{
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{
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unsigned int timeout = 100000;
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grub_uint64_t endtime;
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do_real_config (port);
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do_real_config (port);
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if (port->broken > 5)
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endtime = grub_get_time_ms ();
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else if (port->broken > 1)
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endtime = grub_get_time_ms () + 50;
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else
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endtime = grub_get_time_ms () + 200;
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/* Wait until the transmitter holding register is empty. */
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/* Wait until the transmitter holding register is empty. */
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while ((grub_inb (port->port + UART_LSR) & UART_EMPTY_TRANSMITTER) == 0)
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while ((grub_inb (port->port + UART_LSR) & UART_EMPTY_TRANSMITTER) == 0)
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{
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{
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if (--timeout == 0)
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if (grub_get_time_ms () > endtime)
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{
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port->broken++;
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/* There is something wrong. But what can I do? */
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/* There is something wrong. But what can I do? */
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return;
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return;
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}
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}
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}
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if (port->broken)
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port->broken--;
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grub_outb (c, port->port + UART_TX);
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grub_outb (c, port->port + UART_TX);
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}
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}
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@ -71,8 +71,12 @@ struct grub_serial_port
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when malloc isn't available it's a union.
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when malloc isn't available it's a union.
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*/
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*/
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union
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union
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{
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struct
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{
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{
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grub_port_t port;
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grub_port_t port;
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int broken;
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};
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struct
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struct
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{
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{
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grub_usb_device_t usbdev;
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grub_usb_device_t usbdev;
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