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Date: Fri, 2 May 2008 00:36:58 +0200 (CEST)
From: Stefan Richter <stefanr@...6.in-berlin.de>
To: linux1394-devel@...ts.sourceforge.net
cc: linux-kernel@...r.kernel.org
Subject: [PATCH] firewire: fw-ohci: blacklist dualbuffer for TSB43AB22A on
ASUS boards
According to https://bugzilla.redhat.com/show_bug.cgi?id=435550 the
TI TSB43AB22A on an ASUSTeK M2NPV-VM motherboard does not work in
dual-buffer mode with dvgrab, but does so in packet-per-buffer mode.
Other TSB43AB22 or TSB43AB22A cards do not exhibit this problem. The
least-cost "fix" for now is to force TSB43AB22A on ASUS boards into
packet-per-buffer mode in isochronous reception.
Signed-off-by: Stefan Richter <stefanr@...6.in-berlin.de>
---
(subject to retesting by the reporter)
drivers/firewire/fw-ohci.c | 20 +++++++++++++-------
include/linux/pci_ids.h | 1 +
2 files changed, 14 insertions(+), 7 deletions(-)
Index: linux/drivers/firewire/fw-ohci.c
===================================================================
--- linux.orig/drivers/firewire/fw-ohci.c
+++ linux/drivers/firewire/fw-ohci.c
@@ -171,7 +171,6 @@ struct iso_context {
struct fw_ohci {
struct fw_card card;
- u32 version;
__iomem char *registers;
dma_addr_t self_id_bus;
__le32 *self_id_cpu;
@@ -180,6 +179,8 @@ struct fw_ohci {
int generation;
int request_generation; /* for timestamping incoming requests */
u32 bus_seconds;
+
+ bool use_dualbuffer;
bool old_uninorth;
bool bus_reset_packet_quirk;
@@ -1883,7 +1884,7 @@ ohci_allocate_iso_context(struct fw_card
} else {
mask = &ohci->ir_context_mask;
list = ohci->ir_context_list;
- if (ohci->version >= OHCI_VERSION_1_1)
+ if (ohci->use_dualbuffer)
callback = handle_ir_dualbuffer_packet;
else
callback = handle_ir_packet_per_buffer;
@@ -1947,7 +1948,7 @@ static int ohci_start_iso(struct fw_iso_
} else {
index = ctx - ohci->ir_context_list;
control = IR_CONTEXT_ISOCH_HEADER;
- if (ohci->version >= OHCI_VERSION_1_1)
+ if (ohci->use_dualbuffer)
control |= IR_CONTEXT_DUAL_BUFFER_MODE;
match = (tags << 28) | (sync << 8) | ctx->base.channel;
if (cycle >= 0) {
@@ -2277,7 +2278,7 @@ ohci_queue_iso(struct fw_iso_context *ba
spin_lock_irqsave(&ctx->context.ohci->lock, flags);
if (base->type == FW_ISO_CONTEXT_TRANSMIT)
retval = ohci_queue_iso_transmit(base, packet, buffer, payload);
- else if (ctx->context.ohci->version >= OHCI_VERSION_1_1)
+ else if (ctx->context.ohci->use_dualbuffer)
retval = ohci_queue_iso_receive_dualbuffer(base, packet,
buffer, payload);
else
@@ -2340,7 +2341,7 @@ static int __devinit
pci_probe(struct pci_dev *dev, const struct pci_device_id *ent)
{
struct fw_ohci *ohci;
- u32 bus_options, max_receive, link_speed;
+ u32 bus_options, max_receive, link_speed, version;
u64 guid;
int err;
size_t size;
@@ -2436,13 +2437,18 @@ pci_probe(struct pci_dev *dev, const str
guid = ((u64) reg_read(ohci, OHCI1394_GUIDHi) << 32) |
reg_read(ohci, OHCI1394_GUIDLo);
+ version = reg_read(ohci, OHCI1394_Version) & 0x00ff00ff;
+ ohci->use_dualbuffer = version >= OHCI_VERSION_1_1 &&
+ !(dev->vendor == PCI_VENDOR_ID_TI &&
+ dev->device == PCI_DEVICE_ID_TI_TSB43AB22 &&
+ dev->subsystem_vendor == PCI_VENDOR_ID_ASUSTEK);
+
err = fw_card_add(&ohci->card, max_receive, link_speed, guid);
if (err < 0)
goto fail_self_id;
- ohci->version = reg_read(ohci, OHCI1394_Version) & 0x00ff00ff;
fw_notify("Added fw-ohci device %s, OHCI version %x.%x\n",
- dev->dev.bus_id, ohci->version >> 16, ohci->version & 0xff);
+ dev->dev.bus_id, version >> 16, version & 0xff);
return 0;
fail_self_id:
Index: linux/include/linux/pci_ids.h
===================================================================
--- linux.orig/include/linux/pci_ids.h
+++ linux/include/linux/pci_ids.h
@@ -747,6 +747,7 @@
#define PCI_VENDOR_ID_TI 0x104c
#define PCI_DEVICE_ID_TI_TVP4020 0x3d07
#define PCI_DEVICE_ID_TI_4450 0x8011
+#define PCI_DEVICE_ID_TI_TSB43AB22 0x8023
#define PCI_DEVICE_ID_TI_XX21_XX11 0x8031
#define PCI_DEVICE_ID_TI_XX21_XX11_FM 0x8033
#define PCI_DEVICE_ID_TI_XX21_XX11_SD 0x8034
--
Stefan Richter
-=====-==--- -=-= ---=-
http://arcgraph.de/sr/
--
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