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Message-ID: <tkrat.c4405ca125bee6ed@s5r6.in-berlin.de>
Date: Sat, 1 Mar 2008 02:47:15 +0100 (CET)
From: Stefan Richter <stefanr@...6.in-berlin.de>
To: linux1394-devel@...ts.sourceforge.net
cc: linuxppc-dev@...abs.org, linux-kernel@...r.kernel.org
Subject: [PATCH 2/3] firewire: fw-ohci: Apple UniNorth 1st generation support
Mostly copied from ohci1394.c. Necessary for some older Macs, e.g.
PowerBook G3 Pismo and early PowerBook G4 Titanium.
Signed-off-by: Stefan Richter <stefanr@...6.in-berlin.de>
---
Since my TiBook has a broken FireWire PHY I was only able to test
the byte order of self ID packets but not of the headers of any
other packets. The code in handle_ar_packet() is only guesswork
from ohci1394.c's respective code. Also, I wonder what's up with
isochronous packets...
drivers/firewire/fw-ohci.c | 29 +++++++++++++++++++++--------
1 file changed, 21 insertions(+), 8 deletions(-)
Index: linux-2.6.25-rc3/drivers/firewire/fw-ohci.c
===================================================================
--- linux-2.6.25-rc3.orig/drivers/firewire/fw-ohci.c
+++ linux-2.6.25-rc3/drivers/firewire/fw-ohci.c
@@ -179,6 +179,7 @@ struct fw_ohci {
int generation;
int request_generation;
u32 bus_seconds;
+ bool old_uninorth;
/*
* Spinlock for accessing fw_ohci data. Never call out of
@@ -315,15 +316,22 @@ static int ar_context_add_page(struct ar
return 0;
}
+#if defined(CONFIG_PPC_PMAC) && defined(CONFIG_PPC32)
+#define cond_le32_to_cpu(v) \
+ (ohci->old_uninorth ? (__force __u32)(v) : le32_to_cpu(v))
+#else
+#define cond_le32_to_cpu(v) le32_to_cpu(v)
+#endif
+
static __le32 *handle_ar_packet(struct ar_context *ctx, __le32 *buffer)
{
struct fw_ohci *ohci = ctx->ohci;
struct fw_packet p;
u32 status, length, tcode;
- p.header[0] = le32_to_cpu(buffer[0]);
- p.header[1] = le32_to_cpu(buffer[1]);
- p.header[2] = le32_to_cpu(buffer[2]);
+ p.header[0] = cond_le32_to_cpu(buffer[0]);
+ p.header[1] = cond_le32_to_cpu(buffer[1]);
+ p.header[2] = cond_le32_to_cpu(buffer[2]);
tcode = (p.header[0] >> 4) & 0x0f;
switch (tcode) {
@@ -335,7 +343,7 @@ static __le32 *handle_ar_packet(struct a
break;
case TCODE_READ_BLOCK_REQUEST :
- p.header[3] = le32_to_cpu(buffer[3]);
+ p.header[3] = cond_le32_to_cpu(buffer[3]);
p.header_length = 16;
p.payload_length = 0;
break;
@@ -344,7 +352,7 @@ static __le32 *handle_ar_packet(struct a
case TCODE_READ_BLOCK_RESPONSE:
case TCODE_LOCK_REQUEST:
case TCODE_LOCK_RESPONSE:
- p.header[3] = le32_to_cpu(buffer[3]);
+ p.header[3] = cond_le32_to_cpu(buffer[3]);
p.header_length = 16;
p.payload_length = p.header[3] >> 16;
break;
@@ -361,7 +369,7 @@ static __le32 *handle_ar_packet(struct a
/* FIXME: What to do about evt_* errors? */
length = (p.header_length + p.payload_length + 3) / 4;
- status = le32_to_cpu(buffer[length]);
+ status = cond_le32_to_cpu(buffer[length]);
p.ack = ((status >> 16) & 0x1f) - 16;
p.speed = (status >> 21) & 0x7;
@@ -1026,13 +1034,14 @@ static void bus_reset_tasklet(unsigned l
*/
self_id_count = (reg_read(ohci, OHCI1394_SelfIDCount) >> 3) & 0x3ff;
- generation = (le32_to_cpu(ohci->self_id_cpu[0]) >> 16) & 0xff;
+ generation = (cond_le32_to_cpu(ohci->self_id_cpu[0]) >> 16) & 0xff;
rmb();
for (i = 1, j = 0; j < self_id_count; i += 2, j++) {
if (ohci->self_id_cpu[i] != ~ohci->self_id_cpu[i + 1])
fw_error("inconsistent self IDs\n");
- ohci->self_id_buffer[j] = le32_to_cpu(ohci->self_id_cpu[i]);
+ ohci->self_id_buffer[j] =
+ cond_le32_to_cpu(ohci->self_id_cpu[i]);
}
rmb();
@@ -2091,6 +2100,10 @@ pci_probe(struct pci_dev *dev, const str
pci_write_config_dword(dev, OHCI1394_PCI_HCI_Control, 0);
pci_set_drvdata(dev, ohci);
+#if defined(CONFIG_PPC_PMAC) && defined(CONFIG_PPC32)
+ ohci->old_uninorth = dev->vendor == PCI_VENDOR_ID_APPLE &&
+ dev->device == PCI_DEVICE_ID_APPLE_UNI_N_FW;
+#endif
spin_lock_init(&ohci->lock);
tasklet_init(&ohci->bus_reset_tasklet,
--
Stefan Richter
-=====-==--- --== ----=
http://arcgraph.de/sr/
--
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