[coreboot] New patch to review for coreboot: 066220f [PATCH] libpayload: Implement EHCI reset function
Idwer Vollering (vidwer@gmail.com)
gerrit at coreboot.org
Fri Nov 9 14:06:52 CET 2012
Idwer Vollering (vidwer at gmail.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/1814
-gerrit
commit 066220f124cc88d4e94f893d610826f31ae2dd5f
Author: Anton Kochkov <a.kochkov at securitycode.ru>
Date: Fri Nov 9 14:06:05 2012 +0100
[PATCH] libpayload: Implement EHCI reset function
Added ehci_reset() function to to full reset of
host controller
Change-Id: Ia48db8462ebbb8f260813eb6ba8349d002c4678b
Signed-off-by: Anton Kochkov <a.kochkov at securitycode.ru>
---
payloads/libpayload/drivers/usb/ehci.c | 16 +++++++++++++++-
payloads/libpayload/drivers/usb/ehci_private.h | 3 +++
2 files changed, 18 insertions(+), 1 deletion(-)
diff --git a/payloads/libpayload/drivers/usb/ehci.c b/payloads/libpayload/drivers/usb/ehci.c
index 29b399a..2ac1480 100644
--- a/payloads/libpayload/drivers/usb/ehci.c
+++ b/payloads/libpayload/drivers/usb/ehci.c
@@ -51,7 +51,21 @@ static void ehci_stop (hci_t *controller)
static void ehci_reset (hci_t *controller)
{
-
+ short count = 0;
+ ehci_stop(controller);
+ /* wait 10 ms just to be shure */
+ mdelay(10);
+ if (EHCI_INST(controller)->operation->usbsts & HC_OP_HC_HALTED) {
+ EHCI_INST(controller)->operation->usbcmd = HC_OP_HC_RESET;
+ /* wait 100 ms */
+ for (count = 0; count < 10; count++) {
+ mdelay(10);
+ if (!(EHCI_INST(controller)->operation->usbcmd & HC_OP_HC_RESET)) {
+ return;
+ }
+ }
+ }
+ usb_debug("ehci_reset(): reset failed!\n");
}
static int ehci_set_periodic_schedule(ehci_t *ehcic, int enable)
diff --git a/payloads/libpayload/drivers/usb/ehci_private.h b/payloads/libpayload/drivers/usb/ehci_private.h
index 3276e23..3b9faf6 100644
--- a/payloads/libpayload/drivers/usb/ehci_private.h
+++ b/payloads/libpayload/drivers/usb/ehci_private.h
@@ -61,6 +61,7 @@ typedef volatile struct {
typedef volatile struct {
u32 usbcmd;
#define HC_OP_RS 1
+#define HC_OP_HC_RESET (1 << 1)
#define HC_OP_PERIODIC_SCHED_EN_SHIFT 4
#define HC_OP_PERIODIC_SCHED_EN (1 << HC_OP_PERIODIC_SCHED_EN_SHIFT)
#define HC_OP_ASYNC_SCHED_EN_SHIFT 5
@@ -70,6 +71,8 @@ typedef volatile struct {
#define HC_OP_PERIODIC_SCHED_STAT (1 << HC_OP_PERIODIC_SCHED_STAT_SHIFT)
#define HC_OP_ASYNC_SCHED_STAT_SHIFT 15
#define HC_OP_ASYNC_SCHED_STAT (1 << HC_OP_ASYNC_SCHED_STAT_SHIFT)
+#define HC_OP_HC_HALTED_SHIFT 12
+#define HC_OP_HC_HALTED (1 << HC_OP_HC_HALTED_SHIFT)
u32 usbintr;
u32 frindex;
u32 ctrldssegment;
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