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Diffstat (limited to 'drivers/parport/parport_pc.c')
-rw-r--r--drivers/parport/parport_pc.c98
1 files changed, 57 insertions, 41 deletions
diff --git a/drivers/parport/parport_pc.c b/drivers/parport/parport_pc.c
index edf83e945853..151bf5bc8afe 100644
--- a/drivers/parport/parport_pc.c
+++ b/drivers/parport/parport_pc.c
@@ -626,7 +626,7 @@ static size_t parport_pc_fifo_write_block_dma(struct parport *port,
unsigned long start = (unsigned long) buf;
unsigned long end = (unsigned long) buf + length - 1;
-dump_parport_state("enter fifo_write_block_dma", port);
+ dump_parport_state("enter fifo_write_block_dma", port);
if (end < MAX_DMA_ADDRESS) {
/* If it would cross a 64k boundary, cap it at the end. */
if ((start ^ end) & ~0xffffUL)
@@ -737,7 +737,7 @@ false_alarm:
if (dma_handle)
dma_unmap_single(dev, dma_handle, length, DMA_TO_DEVICE);
-dump_parport_state("leave fifo_write_block_dma", port);
+ dump_parport_state("leave fifo_write_block_dma", port);
return length - left;
}
#endif
@@ -955,8 +955,8 @@ static size_t parport_pc_ecp_read_block_pio(struct parport *port,
char *bufp = buf;
port = port->physport;
-DPRINTK(KERN_DEBUG "parport_pc: parport_pc_ecp_read_block_pio\n");
-dump_parport_state("enter fcn", port);
+ DPRINTK(KERN_DEBUG "parport_pc: parport_pc_ecp_read_block_pio\n");
+ dump_parport_state("enter fcn", port);
/* Special case: a timeout of zero means we cannot call schedule().
* Also if O_NONBLOCK is set then use the default implementation. */
@@ -1112,14 +1112,15 @@ false_alarm:
if (ecrval & 0x02) {
/* FIFO is full. */
-dump_parport_state("FIFO full", port);
+ dump_parport_state("FIFO full", port);
insb(fifo, bufp, fifo_depth);
bufp += fifo_depth;
left -= fifo_depth;
continue;
}
-DPRINTK(KERN_DEBUG "*** ecp_read_block_pio: reading one byte from the FIFO\n");
+ DPRINTK(KERN_DEBUG
+ "*** ecp_read_block_pio: reading one byte from the FIFO\n");
/* FIFO not filled. We will cycle this loop for a while
* and either the peripheral will fill it faster,
@@ -1135,7 +1136,7 @@ DPRINTK(KERN_DEBUG "*** ecp_read_block_pio: reading one byte from the FIFO\n");
}
port->ieee1284.phase = IEEE1284_PH_REV_IDLE;
-dump_parport_state("rev idle2", port);
+ dump_parport_state("rev idle2", port);
out_no_data:
@@ -1163,7 +1164,7 @@ out_no_data:
port->name, lost);
}
-dump_parport_state("fwd idle", port);
+ dump_parport_state("fwd idle", port);
return length - left;
}
#endif /* 0 */
@@ -1216,10 +1217,23 @@ static const struct parport_operations parport_pc_ops = {
};
#ifdef CONFIG_PARPORT_PC_SUPERIO
+
+static struct superio_struct *find_free_superio(void)
+{
+ int i;
+ for (i = 0; i < NR_SUPERIOS; i++)
+ if (superios[i].io == 0)
+ return &superios[i];
+ return NULL;
+}
+
+
/* Super-IO chipset detection, Winbond, SMSC */
static void __devinit show_parconfig_smsc37c669(int io, int key)
{
- int cr1, cr4, cra, cr23, cr26, cr27, i = 0;
+ int cr1, cr4, cra, cr23, cr26, cr27;
+ struct superio_struct *s;
+
static const char *const modes[] = {
"SPP and Bidirectional (PS/2)",
"EPP and SPP",
@@ -1272,30 +1286,29 @@ static void __devinit show_parconfig_smsc37c669(int io, int key)
are related, however DMA can be 1 or 3, assume DMA_A=DMA1,
DMA_C=DMA3 (this is true e.g. for TYAN 1564D Tomcat IV) */
if (cr23 * 4 >= 0x100) { /* if active */
- while ((i < NR_SUPERIOS) && (superios[i].io != 0))
- i++;
- if (i == NR_SUPERIOS) {
+ s = find_free_superio();
+ if (s == NULL)
printk(KERN_INFO "Super-IO: too many chips!\n");
- } else {
+ else {
int d;
switch (cr23 * 4) {
case 0x3bc:
- superios[i].io = 0x3bc;
- superios[i].irq = 7;
+ s->io = 0x3bc;
+ s->irq = 7;
break;
case 0x378:
- superios[i].io = 0x378;
- superios[i].irq = 7;
+ s->io = 0x378;
+ s->irq = 7;
break;
case 0x278:
- superios[i].io = 0x278;
- superios[i].irq = 5;
+ s->io = 0x278;
+ s->irq = 5;
}
d = (cr26 & 0x0f);
if (d == 1 || d == 3)
- superios[i].dma = d;
+ s->dma = d;
else
- superios[i].dma = PARPORT_DMA_NONE;
+ s->dma = PARPORT_DMA_NONE;
}
}
}
@@ -1303,7 +1316,8 @@ static void __devinit show_parconfig_smsc37c669(int io, int key)
static void __devinit show_parconfig_winbond(int io, int key)
{
- int cr30, cr60, cr61, cr70, cr74, crf0, i = 0;
+ int cr30, cr60, cr61, cr70, cr74, crf0;
+ struct superio_struct *s;
static const char *const modes[] = {
"Standard (SPP) and Bidirectional(PS/2)", /* 0 */
"EPP-1.9 and SPP",
@@ -1356,14 +1370,13 @@ static void __devinit show_parconfig_winbond(int io, int key)
}
if (cr30 & 0x01) { /* the settings can be interrogated later ... */
- while ((i < NR_SUPERIOS) && (superios[i].io != 0))
- i++;
- if (i == NR_SUPERIOS) {
+ s = find_free_superio();
+ if (s == NULL)
printk(KERN_INFO "Super-IO: too many chips!\n");
- } else {
- superios[i].io = (cr60<<8)|cr61;
- superios[i].irq = cr70&0x0f;
- superios[i].dma = (((cr74 & 0x07) > 3) ?
+ else {
+ s->io = (cr60 << 8) | cr61;
+ s->irq = cr70 & 0x0f;
+ s->dma = (((cr74 & 0x07) > 3) ?
PARPORT_DMA_NONE : (cr74 & 0x07));
}
}
@@ -1618,25 +1631,28 @@ static void __devinit detect_and_report_it87(void)
}
#endif /* CONFIG_PARPORT_PC_SUPERIO */
-static int get_superio_dma(struct parport *p)
+static struct superio_struct *find_superio(struct parport *p)
{
- int i = 0;
+ int i;
+ for (i = 0; i < NR_SUPERIOS; i++)
+ if (superios[i].io != p->base)
+ return &superios[i];
+ return NULL;
+}
- while ((i < NR_SUPERIOS) && (superios[i].io != p->base))
- i++;
- if (i != NR_SUPERIOS)
- return superios[i].dma;
+static int get_superio_dma(struct parport *p)
+{
+ struct superio_struct *s = find_superio(p);
+ if (s)
+ return s->dma;
return PARPORT_DMA_NONE;
}
static int get_superio_irq(struct parport *p)
{
- int i = 0;
-
- while ((i < NR_SUPERIOS) && (superios[i].io != p->base))
- i++;
- if (i != NR_SUPERIOS)
- return superios[i].irq;
+ struct superio_struct *s = find_superio(p);
+ if (s)
+ return s->irq;
return PARPORT_IRQ_NONE;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-30 09:33:08 +0100