firewire: Implement functionality to stop isochronous DMA contexts.
Signed-off-by: Kristian Høgsberg <krh@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
diff --git a/drivers/firewire/fw-ohci.c b/drivers/firewire/fw-ohci.c
index faa3844..c0ab868 100644
--- a/drivers/firewire/fw-ohci.c
+++ b/drivers/firewire/fw-ohci.c
@@ -570,13 +570,19 @@
static void context_stop(struct context *ctx)
{
u32 reg;
+ int i;
reg_write(ctx->ohci, control_clear(ctx->regs), CONTEXT_RUN);
+ flush_writes(ctx->ohci);
- reg = reg_read(ctx->ohci, control_set(ctx->regs));
- if (reg & CONTEXT_ACTIVE)
- fw_notify("Tried to stop context, but it is still active "
- "(0x%08x).\n", reg);
+ for (i = 0; i < 10; i++) {
+ reg = reg_read(ctx->ohci, control_set(ctx->regs));
+ if ((reg & CONTEXT_ACTIVE) == 0)
+ break;
+
+ fw_notify("context_stop: still active (0x%08x)\n", reg);
+ msleep(1);
+ }
}
static void
@@ -1379,6 +1385,25 @@
return 0;
}
+static int ohci_stop_iso(struct fw_iso_context *base)
+{
+ struct fw_ohci *ohci = fw_ohci(base->card);
+ struct iso_context *ctx = container_of(base, struct iso_context, base);
+ int index;
+
+ if (ctx->base.type == FW_ISO_CONTEXT_TRANSMIT) {
+ index = ctx - ohci->it_context_list;
+ reg_write(ohci, OHCI1394_IsoXmitIntMaskClear, 1 << index);
+ } else {
+ index = ctx - ohci->ir_context_list;
+ reg_write(ohci, OHCI1394_IsoRecvIntMaskClear, 1 << index);
+ }
+ flush_writes(ohci);
+ context_stop(&ctx->context);
+
+ return 0;
+}
+
static void ohci_free_iso_context(struct fw_iso_context *base)
{
struct fw_ohci *ohci = fw_ohci(base->card);
@@ -1386,22 +1411,18 @@
unsigned long flags;
int index;
+ ohci_stop_iso(base);
+ context_release(&ctx->context);
+
spin_lock_irqsave(&ohci->lock, flags);
if (ctx->base.type == FW_ISO_CONTEXT_TRANSMIT) {
index = ctx - ohci->it_context_list;
- reg_write(ohci, OHCI1394_IsoXmitContextControlClear(index), ~0);
- reg_write(ohci, OHCI1394_IsoXmitIntMaskClear, 1 << index);
ohci->it_context_mask |= 1 << index;
} else {
index = ctx - ohci->ir_context_list;
- reg_write(ohci, OHCI1394_IsoRcvContextControlClear(index), ~0);
- reg_write(ohci, OHCI1394_IsoRecvIntMaskClear, 1 << index);
ohci->ir_context_mask |= 1 << index;
}
- flush_writes(ohci);
-
- context_release(&ctx->context);
spin_unlock_irqrestore(&ohci->lock, flags);
}
@@ -1595,6 +1616,7 @@
.free_iso_context = ohci_free_iso_context,
.queue_iso = ohci_queue_iso,
.start_iso = ohci_start_iso,
+ .stop_iso = ohci_stop_iso,
};
static int software_reset(struct fw_ohci *ohci)