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path: root/drivers/parport/parport_pc.c
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Diffstat (limited to 'drivers/parport/parport_pc.c')
-rw-r--r--drivers/parport/parport_pc.c34
1 files changed, 24 insertions, 10 deletions
diff --git a/drivers/parport/parport_pc.c b/drivers/parport/parport_pc.c
index c5774e7855d..e7f3bcb7900 100644
--- a/drivers/parport/parport_pc.c
+++ b/drivers/parport/parport_pc.c
@@ -67,6 +67,10 @@
#define PARPORT_PC_MAX_PORTS PARPORT_MAX
+#ifdef CONFIG_ISA_DMA_API
+#define HAS_DMA
+#endif
+
/* ECR modes */
#define ECR_SPP 00
#define ECR_PS2 01
@@ -610,6 +614,7 @@ dump_parport_state ("leave fifo_write_block_pio", port);
return length - left;
}
+#ifdef HAS_DMA
static size_t parport_pc_fifo_write_block_dma (struct parport *port,
const void *buf, size_t length)
{
@@ -732,6 +737,17 @@ dump_parport_state ("enter fifo_write_block_dma", port);
dump_parport_state ("leave fifo_write_block_dma", port);
return length - left;
}
+#endif
+
+static inline size_t parport_pc_fifo_write_block(struct parport *port,
+ const void *buf, size_t length)
+{
+#ifdef HAS_DMA
+ if (port->dma != PARPORT_DMA_NONE)
+ return parport_pc_fifo_write_block_dma (port, buf, length);
+#endif
+ return parport_pc_fifo_write_block_pio (port, buf, length);
+}
/* Parallel Port FIFO mode (ECP chipsets) */
static size_t parport_pc_compat_write_block_pio (struct parport *port,
@@ -758,10 +774,7 @@ static size_t parport_pc_compat_write_block_pio (struct parport *port,
port->physport->ieee1284.phase = IEEE1284_PH_FWD_DATA;
/* Write the data to the FIFO. */
- if (port->dma != PARPORT_DMA_NONE)
- written = parport_pc_fifo_write_block_dma (port, buf, length);
- else
- written = parport_pc_fifo_write_block_pio (port, buf, length);
+ written = parport_pc_fifo_write_block(port, buf, length);
/* Finish up. */
/* For some hardware we don't want to touch the mode until
@@ -856,10 +869,7 @@ static size_t parport_pc_ecp_write_block_pio (struct parport *port,
port->physport->ieee1284.phase = IEEE1284_PH_FWD_DATA;
/* Write the data to the FIFO. */
- if (port->dma != PARPORT_DMA_NONE)
- written = parport_pc_fifo_write_block_dma (port, buf, length);
- else
- written = parport_pc_fifo_write_block_pio (port, buf, length);
+ written = parport_pc_fifo_write_block(port, buf, length);
/* Finish up. */
/* For some hardware we don't want to touch the mode until
@@ -2285,6 +2295,7 @@ struct parport *parport_pc_probe_port (unsigned long int base,
}
#ifdef CONFIG_PARPORT_PC_FIFO
+#ifdef HAS_DMA
if (p->dma != PARPORT_DMA_NONE) {
if (request_dma (p->dma, p->name)) {
printk (KERN_WARNING "%s: dma %d in use, "
@@ -2306,7 +2317,8 @@ struct parport *parport_pc_probe_port (unsigned long int base,
}
}
}
-#endif /* CONFIG_PARPORT_PC_FIFO */
+#endif
+#endif
}
/* Done probing. Now put the port into a sensible start-up state. */
@@ -2367,11 +2379,13 @@ void parport_pc_unregister_port (struct parport *p)
if (p->modes & PARPORT_MODE_ECP)
release_region(p->base_hi, 3);
#ifdef CONFIG_PARPORT_PC_FIFO
+#ifdef HAS_DMA
if (priv->dma_buf)
pci_free_consistent(priv->dev, PAGE_SIZE,
priv->dma_buf,
priv->dma_handle);
-#endif /* CONFIG_PARPORT_PC_FIFO */
+#endif
+#endif
kfree (p->private_data);
parport_put_port(p);
kfree (ops); /* hope no-one cached it */