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usbdebug: Add compatibility quirk for FX2 

This quirk is needed with a DIY debug dongle using obsolete
CY7C68013 (aka FX2) USB chips. Old revision of chip requires a
SET_CONFIGURATION to be sent, while this is not required in EHCI
debug port specs.

Change-Id: I4926eb19b7e991d6efeef782682756571ad006b9
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/3386
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
This commit is contained in:
Kyösti Mälkki 2013-06-06 10:33:39 +03:00
parent d79914008a
commit 6bfe61d5d1
1 changed files with 14 additions and 1 deletions
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15
src/lib/usbdebug.c
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@ -411,7 +411,7 @@ static int usbdebug_init_(unsigned ehci_bar, unsigned offset, struct ehci_debug_
u32 cmd, ctrl, status, portsc, hcs_params;
u32 debug_port, new_debug_port = 0, n_ports;
u32 devnum;
int ret, i;
int ret, i, configured;
int loop;
int port_map_tried;
int playtimes = 3;
@ -569,9 +569,22 @@ try_next_port:
dprintk(BIOS_INFO, "EHCI debug interface enabled.\n");
/* Perform a small write to get the even/odd data state in sync */
configured = 0;
small_write:
ret = dbgp_bulk_write(ehci_debug, USB_DEBUG_DEVNUM, dbgp_desc.bDebugOutEndpoint, "USB\r\n",5);
if (ret < 0) {
dprintk(BIOS_INFO, "dbgp_bulk_write failed: %d\n", ret);
if (!configured) {
/* Send Set Configure request to device. This is required for FX2
(CY7C68013) to transfer from USB state Addressed to Configured,
only then endpoints other than 0 are enabled. */
if (dbgp_control_msg(ehci_debug, USB_DEBUG_DEVNUM,
USB_DIR_OUT | USB_TYPE_STANDARD | USB_RECIP_DEVICE,
USB_REQ_SET_CONFIGURATION, 1, 0, NULL, 0) >= 0) {
configured = 1;
goto small_write;
}
}
ret = -9;
goto err;
}