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-rw-r--r--drivers/firewire/fw-iso.c2
-rw-r--r--drivers/firewire/fw-ohci.c107
-rw-r--r--drivers/firewire/fw-transaction.h3
3 files changed, 95 insertions, 17 deletions
diff --git a/drivers/firewire/fw-iso.c b/drivers/firewire/fw-iso.c
index 1605e11..736b1bf 100644
--- a/drivers/firewire/fw-iso.c
+++ b/drivers/firewire/fw-iso.c
@@ -111,7 +111,7 @@ fw_iso_context_create(struct fw_card *card, int type, size_t header_size,
{
struct fw_iso_context *ctx;
- ctx = card->driver->allocate_iso_context(card, type);
+ ctx = card->driver->allocate_iso_context(card, type, header_size);
if (IS_ERR(ctx))
return ctx;
diff --git a/drivers/firewire/fw-ohci.c b/drivers/firewire/fw-ohci.c
index 76ac70a..9b9ea0f 100644
--- a/drivers/firewire/fw-ohci.c
+++ b/drivers/firewire/fw-ohci.c
@@ -1267,16 +1267,34 @@ ohci_enable_phys_dma(struct fw_card *card, int node_id, int generation)
spin_unlock_irqrestore(&ohci->lock, flags);
return retval;
}
+
+static int handle_ir_bufferfill_packet(struct context *context,
+ struct descriptor *d,
+ struct descriptor *last)
+{
+ struct iso_context *ctx =
+ container_of(context, struct iso_context, context);
-static int handle_ir_packet(struct context *context,
- struct descriptor *d,
- struct descriptor *last)
+ if (d->res_count > 0)
+ return 0;
+
+ if (le16_to_cpu(last->control) & descriptor_irq_always)
+ ctx->base.callback(&ctx->base,
+ le16_to_cpu(last->res_count),
+ 0, NULL, ctx->base.callback_data);
+
+ return 1;
+}
+
+static int handle_ir_dualbuffer_packet(struct context *context,
+ struct descriptor *d,
+ struct descriptor *last)
{
struct iso_context *ctx =
container_of(context, struct iso_context, context);
struct db_descriptor *db = (struct db_descriptor *) d;
size_t header_length;
-
+
if (db->first_res_count > 0 && db->second_res_count > 0)
/* This descriptor isn't done yet, stop iteration. */
return 0;
@@ -1317,7 +1335,7 @@ static int handle_it_packet(struct context *context,
}
static struct fw_iso_context *
-ohci_allocate_iso_context(struct fw_card *card, int type)
+ohci_allocate_iso_context(struct fw_card *card, int type, size_t header_size)
{
struct fw_ohci *ohci = fw_ohci(card);
struct iso_context *ctx, *list;
@@ -1333,7 +1351,10 @@ ohci_allocate_iso_context(struct fw_card *card, int type)
} else {
mask = &ohci->ir_context_mask;
list = ohci->ir_context_list;
- callback = handle_ir_packet;
+ if (header_size > 0)
+ callback = handle_ir_dualbuffer_packet;
+ else
+ callback = handle_ir_bufferfill_packet;
}
spin_lock_irqsave(&ohci->lock, flags);
@@ -1378,7 +1399,7 @@ static int ohci_start_iso(struct fw_iso_context *base, s32 cycle)
{
struct iso_context *ctx = container_of(base, struct iso_context, base);
struct fw_ohci *ohci = ctx->context.ohci;
- u32 cycle_match = 0;
+ u32 cycle_match = 0, mode;
int index;
if (ctx->base.type == FW_ISO_CONTEXT_TRANSMIT) {
@@ -1393,11 +1414,15 @@ static int ohci_start_iso(struct fw_iso_context *base, s32 cycle)
} else {
index = ctx - ohci->ir_context_list;
+ if (ctx->base.header_size > 0)
+ mode = IR_CONTEXT_DUAL_BUFFER_MODE;
+ else
+ mode = IR_CONTEXT_BUFFER_FILL;
reg_write(ohci, OHCI1394_IsoRecvIntEventClear, 1 << index);
reg_write(ohci, OHCI1394_IsoRecvIntMaskSet, 1 << index);
reg_write(ohci, context_match(ctx->context.regs),
0xf0000000 | ctx->base.channel);
- context_run(&ctx->context, IR_CONTEXT_DUAL_BUFFER_MODE);
+ context_run(&ctx->context, mode);
}
return 0;
@@ -1544,10 +1569,10 @@ ohci_queue_iso_transmit(struct fw_iso_context *base,
}
static int
-ohci_queue_iso_receive(struct fw_iso_context *base,
- struct fw_iso_packet *packet,
- struct fw_iso_buffer *buffer,
- unsigned long payload)
+ohci_queue_iso_receive_dualbuffer(struct fw_iso_context *base,
+ struct fw_iso_packet *packet,
+ struct fw_iso_buffer *buffer,
+ unsigned long payload)
{
struct iso_context *ctx = container_of(base, struct iso_context, base);
struct db_descriptor *db = NULL;
@@ -1604,10 +1629,58 @@ ohci_queue_iso_receive(struct fw_iso_context *base,
if (p->interrupt)
db->control |= cpu_to_le16(descriptor_irq_always);
+
+ return 0;
+}
- return 0;
- }
+static int
+ohci_queue_iso_receive_bufferfill(struct fw_iso_context *base,
+ struct fw_iso_packet *packet,
+ struct fw_iso_buffer *buffer,
+ unsigned long payload)
+{
+ struct iso_context *ctx = container_of(base, struct iso_context, base);
+ struct descriptor *d = NULL;
+ dma_addr_t d_bus, page_bus;
+ u32 length, rest;
+ int page, offset;
+ page = payload >> PAGE_SHIFT;
+ offset = payload & ~PAGE_MASK;
+ rest = packet->payload_length;
+
+ while (rest > 0) {
+ d = context_get_descriptors(&ctx->context, 1, &d_bus);
+ if (d == NULL)
+ return -ENOMEM;
+
+ d->control = cpu_to_le16(descriptor_input_more |
+ descriptor_status |
+ descriptor_branch_always);
+
+ if (offset + rest < PAGE_SIZE)
+ length = rest;
+ else
+ length = PAGE_SIZE - offset;
+
+ page_bus = page_private(buffer->pages[page]);
+ d->data_address = cpu_to_le32(page_bus + offset);
+ d->req_count = cpu_to_le16(length);
+ d->res_count = cpu_to_le16(length);
+
+ context_append(&ctx->context, d, 1, 0);
+
+ offset = (offset + length) & ~PAGE_MASK;
+ rest -= length;
+ page++;
+ }
+
+ if (packet->interrupt)
+ d->control |= cpu_to_le16(descriptor_irq_always);
+
+ return 0;
+}
+
static int
ohci_queue_iso(struct fw_iso_context *base,
struct fw_iso_packet *packet,
@@ -1616,8 +1689,12 @@ ohci_queue_iso(struct fw_iso_context *base,
{
if (base->type == FW_ISO_CONTEXT_TRANSMIT)
return ohci_queue_iso_transmit(base, packet, buffer, payload);
+ else if (base->header_size == 0)
+ return ohci_queue_iso_receive_bufferfill(base, packet,
+ buffer, payload);
else
- return ohci_queue_iso_receive(base, packet, buffer, payload);
+ return ohci_queue_iso_receive_dualbuffer(base, packet,
+ buffer, payload);
}
static const struct fw_card_driver ohci_driver = {
diff --git a/drivers/firewire/fw-transaction.h b/drivers/firewire/fw-transaction.h
index 7942e91..1bbcbb3 100644
--- a/drivers/firewire/fw-transaction.h
+++ b/drivers/firewire/fw-transaction.h
@@ -425,7 +425,8 @@ struct fw_card_driver {
int node_id, int generation);
struct fw_iso_context *
- (*allocate_iso_context)(struct fw_card *card, int type);
+ (*allocate_iso_context)(struct fw_card *card,
+ int type, size_t header_size);
void (*free_iso_context)(struct fw_iso_context *ctx);
int (*start_iso)(struct fw_iso_context *ctx, s32 cycle);
generated by cgit v1.1 at 2024-10-30 16:27:45 +0000