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Blackfin serial driver: pending a unique anomaly id, tie the break flood issue to ANOMALY_05000230

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pending a unique anomaly id, tie the break flood issue to ANOMALY_05000230
as when that was fixed, the fallout also fixed the break flood

Signed-off-by: Mike Frysinger <michael.frysinger@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
This commit is contained in:
Mike Frysinger 2007-08-05 16:48:08 +08:00 committed by Bryan Wu
parent 85a75996ed
commit bbf275f092
1 changed files with 21 additions and 22 deletions
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43
drivers/serial/bfin_5xx.c
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@ -231,12 +231,10 @@ static void bfin_serial_rx_chars(struct bfin_serial_port *uart)
{ {
struct tty_struct *tty = uart->port.info->tty; struct tty_struct *tty = uart->port.info->tty;
unsigned int status, ch, flg; unsigned int status, ch, flg;
static int in_break = 0;
#ifdef CONFIG_KGDB_UART #ifdef CONFIG_KGDB_UART
struct pt_regs *regs = get_irq_regs(); struct pt_regs *regs = get_irq_regs();
#endif #endif
#ifdef BF533_FAMILY
static int in_break = 0;
#endif
status = UART_GET_LSR(uart); status = UART_GET_LSR(uart);
ch = UART_GET_CHAR(uart); ch = UART_GET_CHAR(uart);
@ -262,29 +260,30 @@ static void bfin_serial_rx_chars(struct bfin_serial_port *uart)
} }
} }
#endif #endif
#ifdef BF533_FAMILY if (ANOMALY_05000230) {
/* The BF533 family of processors have a nice misbehavior where /* The BF533 family of processors have a nice misbehavior where
* they continuously generate characters for a "single" break. * they continuously generate characters for a "single" break.
* We have to basically ignore this flood until the "next" valid * We have to basically ignore this flood until the "next" valid
* character comes across. All other Blackfin families operate * character comes across. All other Blackfin families operate
* properly though. * properly though.
*/ * Note: While Anomaly 05000230 does not directly address this,
if (in_break) { * the changes that went in for it also fixed this issue.
if (ch != 0) { */
in_break = 0; if (in_break) {
ch = UART_GET_CHAR(uart); if (ch != 0) {
if (bfin_revid() < 5) in_break = 0;
ch = UART_GET_CHAR(uart);
if (bfin_revid() < 5)
return;
} else
return; return;
} else }
return;
} }
#endif
if (status & BI) { if (status & BI) {
#ifdef BF533_FAMILY if (ANOMALY_05000230)
in_break = 1; in_break = 1;
#endif
uart->port.icount.brk++; uart->port.icount.brk++;
if (uart_handle_break(&uart->port)) if (uart_handle_break(&uart->port))
goto ignore_char; goto ignore_char;