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USBDEBUG: buffer up to 8 bytes

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EHCI debug allows to send message with 8 bytes length, but
we're only sending one byte in each transaction. Buffer up
to 8 bytes to speed up debug output.

Change-Id: I9dbb406833c4966c3afbd610e1b13a8fa3d62f39
Signed-off-by: Sven Schnelle <svens@stackframe.org>
Reviewed-on: http://review.coreboot.org/1357
Tested-by: build bot (Jenkins)
Reviewed-by: Nico Huber <nico.huber@secunet.com>
This commit is contained in:
Sven Schnelle
2012-07-26 14:31:40 +02:00
committed by Patrick Georgi
parent 0b7b7b6334
commit 82704c63b9
5 changed files with 45 additions and 14 deletions
Download Patch File Download Diff File Expand all files Collapse all files

33
src/lib/usbdebug.c
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@@ -377,7 +377,7 @@ int usbdebug_init(unsigned ehci_bar, unsigned offset, struct ehci_debug_info *in
HC_LENGTH(read32((unsigned long)&ehci_caps->hc_capbase)));
ehci_debug = (struct ehci_dbg_port *)(ehci_bar + offset);
info->ehci_debug = (void *)0;
info->bufidx = 0;
try_next_time:
port_map_tried = 0;
@@ -573,15 +573,34 @@ int early_usbdebug_init(void)
return usbdebug_init(CONFIG_EHCI_BAR, CONFIG_EHCI_DEBUG_OFFSET, dbg_info);
}
void usbdebug_tx_byte(unsigned char data)
void usbdebug_tx_byte(struct ehci_debug_info *dbg_info, unsigned char data)
{
struct ehci_debug_info *dbg_info;
/* "Find" dbg_info structure in Cache */
dbg_info = (struct ehci_debug_info *)
(CONFIG_DCACHE_RAM_BASE + CONFIG_DCACHE_RAM_SIZE - sizeof(struct ehci_debug_info));
if (!dbg_info) {
/* "Find" dbg_info structure in Cache */
dbg_info = (struct ehci_debug_info *)
(CONFIG_DCACHE_RAM_BASE + CONFIG_DCACHE_RAM_SIZE - sizeof(struct ehci_debug_info));
}
if (dbg_info->ehci_debug) {
dbgp_bulk_write_x(dbg_info, (char*)&data, 1);
dbg_info->buf[dbg_info->bufidx++] = data;
if (dbg_info->bufidx >= 8) {
dbgp_bulk_write_x(dbg_info, dbg_info->buf, dbg_info->bufidx);
dbg_info->bufidx = 0;
}
}
}
void usbdebug_tx_flush(struct ehci_debug_info *dbg_info)
{
if (!dbg_info) {
/* "Find" dbg_info structure in Cache */
dbg_info = (struct ehci_debug_info *)
(CONFIG_DCACHE_RAM_BASE + CONFIG_DCACHE_RAM_SIZE - sizeof(struct ehci_debug_info));
}
if (dbg_info->ehci_debug && dbg_info->bufidx > 0) {
dbgp_bulk_write_x(dbg_info, dbg_info->buf, dbg_info->bufidx);
dbg_info->bufidx = 0;
}
}