diff options
Diffstat (limited to 'drivers/vme/bridges/vme_tsi148.c')
| -rw-r--r-- | drivers/vme/bridges/vme_tsi148.c | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/drivers/vme/bridges/vme_tsi148.c b/drivers/vme/bridges/vme_tsi148.c index 16830d8..21ac513 100644 --- a/drivers/vme/bridges/vme_tsi148.c +++ b/drivers/vme/bridges/vme_tsi148.c @@ -1276,8 +1276,8 @@ static ssize_t tsi148_master_read(struct vme_master_resource *image, void *buf, spin_lock(&image->lock); /* The following code handles VME address alignment. We cannot use - * memcpy_xxx directly here because it may cut small data transfers in - * to 8-bit cycles, thus making D16 cycle impossible. + * memcpy_xxx here because it may cut data transfers in to 8-bit + * cycles when D16 or D32 cycles are required on the VME bus. * On the other hand, the bridge itself assures that the maximum data * cycle configured for the transfer is used and splits it * automatically for non-aligned addresses, so we don't want the @@ -1301,9 +1301,9 @@ static ssize_t tsi148_master_read(struct vme_master_resource *image, void *buf, } count32 = (count - done) & ~0x3; - if (count32 > 0) { - memcpy_fromio(buf + done, addr + done, count32); - done += count32; + while (done < count32) { + *(u32 *)(buf + done) = ioread32(addr + done); + done += 4; } if ((count - done) & 0x2) { @@ -1363,7 +1363,7 @@ static ssize_t tsi148_master_write(struct vme_master_resource *image, void *buf, spin_lock(&image->lock); /* Here we apply for the same strategy we do in master_read - * function in order to assure D16 cycle when required. + * function in order to assure the correct cycles. */ if ((uintptr_t)addr & 0x1) { iowrite8(*(u8 *)buf, addr); @@ -1383,9 +1383,9 @@ static ssize_t tsi148_master_write(struct vme_master_resource *image, void *buf, } count32 = (count - done) & ~0x3; - if (count32 > 0) { - memcpy_toio(addr + done, buf + done, count32); - done += count32; + while (done < count32) { + iowrite32(*(u32 *)(buf + done), addr + done); + done += 4; } if ((count - done) & 0x2) { |
