On Mon, 2004-06-07 at 11:11 +0300, Pantelis Antoniou wrote:
> The following patch fixes the problem by properly waiting
> two character times on mode change.
Thanks. Cleaned up and working version looks like this:
--- drivers/serial/cpm_uart/cpm_uart.h.orig 2004-06-06 16:37:05.000000000
+0100
+++ drivers/serial/cpm_uart/cpm_uart.h 2004-06-07 10:06:58.380032904 +0100
@@ -65,6 +65,8 @@
uint dp_addr;
void *mem_addr;
dma_addr_t dma_addr;
+ int baud;
+ int bits;
};
extern int cpm_uart_port_map[UART_NR];
--- drivers/serial/cpm_uart/cpm_uart_core.c.orig 2004-06-07
09:27:48.020341888 +0100
+++ drivers/serial/cpm_uart/cpm_uart_core.c 2004-06-07 10:08:41.849303184
+0100
@@ -44,6 +44,7 @@
#include <asm/io.h>
#include <asm/irq.h>
+#include <asm/delay.h>
#if defined(CONFIG_SERIAL_CPM_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
#define SUPPORT_SYSRQ
@@ -483,6 +484,10 @@
if ((termios->c_cflag & CREAD) == 0)
port->read_status_mask &= ~BD_SC_EMPTY;
+ /* if previous configuration exists wait 2 character times for tx to
finish */
+ if (pinfo->baud != 0 || pinfo->bits != 0)
+ udelay((3 * 1000000 * pinfo->bits) / pinfo->baud);
+
spin_lock_irqsave(&port->lock, flags);
/* Start bit has not been added (so don't, because we would just
@@ -503,6 +508,10 @@
}
cpm_set_brg(pinfo->brg - 1, baud);
+
+ pinfo->baud = baud;
+ pinfo->bits = bits;
+
spin_unlock_irqrestore(&port->lock, flags);
}
--
dwmw2
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