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@s5r6.in-berlin.de>

diff --git a/drivers/firewire/fw-ohci.c b/drivers/firewire/fw-ohci.c
index 182be86..eaa213e 100644 (file)
--- a/drivers/firewire/fw-ohci.c
+++ b/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_context *ctx)
        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 ar_context *ctx, __le32 *buffer)
                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 ar_context *ctx, __le32 *buffer)
        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 ar_context *ctx, __le32 *buffer)
 
        /* 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 long data)
         */
 
        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();
 
@@ -2082,6 +2091,10 @@ pci_probe(struct pci_dev *dev, const struct pci_device_id *ent)
        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,