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authorJason Wessel <jason.wessel@windriver.com>2009-08-20 15:39:49 -0500
committerGreg Kroah-Hartman <gregkh@suse.de>2009-09-23 06:46:38 -0700
commit87a5d15154ae2389251e6ad99216a846b905375c (patch)
tree54a546e1f5f393fae70ca80eddf0b38b1ac9b1c0 /drivers/usb/early
parentdf6c516900d48df3581b23d37d6516a22ec4f2ca (diff)
downloadlinux-87a5d15154ae2389251e6ad99216a846b905375c.tar.bz2
USB: dbgp: insert cr prior to nl as needed
The rs232 drivers send a carriage return prior to a new line in the early printk code. The usb debug driver should do the same because you want to be able to use the same terminal programs and tools for analysis of early printk data. Signed-off-by: Jason Wessel <jason.wessel@windriver.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Yinghai Lu <yinghai@kernel.org> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/early')
-rw-r--r--drivers/usb/early/ehci-dbgp.c22
1 files changed, 16 insertions, 6 deletions
diff --git a/drivers/usb/early/ehci-dbgp.c b/drivers/usb/early/ehci-dbgp.c
index 821b7b21c29c..8de709ac0f55 100644
--- a/drivers/usb/early/ehci-dbgp.c
+++ b/drivers/usb/early/ehci-dbgp.c
@@ -700,17 +700,27 @@ int __init early_dbgp_init(char *s)
static void early_dbgp_write(struct console *con, const char *str, u32 n)
{
int chunk, ret;
+ char buf[DBGP_MAX_PACKET];
+ int use_cr = 0;
if (!ehci_debug)
return;
while (n > 0) {
- chunk = n;
- if (chunk > DBGP_MAX_PACKET)
- chunk = DBGP_MAX_PACKET;
+ for (chunk = 0; chunk < DBGP_MAX_PACKET && n > 0;
+ str++, chunk++, n--) {
+ if (!use_cr && *str == '\n') {
+ use_cr = 1;
+ buf[chunk] = '\r';
+ str--;
+ n++;
+ continue;
+ }
+ if (use_cr)
+ use_cr = 0;
+ buf[chunk] = *str;
+ }
ret = dbgp_bulk_write(USB_DEBUG_DEVNUM,
- dbgp_endpoint_out, str, chunk);
- str += chunk;
- n -= chunk;
+ dbgp_endpoint_out, buf, chunk);
}
}