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authorSergei Shtylyov <sshtylyov@ru.mvista.com>2007-02-07 18:18:28 +0100
committerBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2007-02-07 18:18:28 +0100
commit30dfd12f5384d30c0d0de05eb34d0e26352a20ff (patch)
treec89ce02f1082b9017e7ab0977600624c142a77e8 /drivers
parentd2872239737ad6394b49c7c9ce9ae8d0f07165e5 (diff)
downloadop-kernel-dev-30dfd12f5384d30c0d0de05eb34d0e26352a20ff.zip
op-kernel-dev-30dfd12f5384d30c0d0de05eb34d0e26352a20ff.tar.gz
piix: tuneproc() fixes/cleanups
Fix/cleanup the driver's tuneproc() and ratemask() methods: - PPE, IE, and TIME bits need to be cleared beforehand for the slave drive as well as master (Alan probably just forgot about it); - this driver only supports PIO modes up to 4, so must pass the correct limit to ide_get_best_pio_mode(); - use min_t() macro instead of min(); - simplify slave vs master drive evaluation; - do come coding and formatting cleanups... Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/ide/pci/piix.c21
1 files changed, 10 insertions, 11 deletions
diff --git a/drivers/ide/pci/piix.c b/drivers/ide/pci/piix.c
index 236d8fd4e..52cfc2a 100644
--- a/drivers/ide/pci/piix.c
+++ b/drivers/ide/pci/piix.c
@@ -1,5 +1,5 @@
/*
- * linux/drivers/ide/pci/piix.c Version 0.45 May 12, 2006
+ * linux/drivers/ide/pci/piix.c Version 0.46 December 3, 2006
*
* Copyright (C) 1998-1999 Andrzej Krzysztofowicz, Author and Maintainer
* Copyright (C) 1998-2000 Andre Hedrick <andre@linux-ide.org>
@@ -163,7 +163,7 @@ static u8 piix_ratemask (ide_drive_t *drive)
* if the drive cannot see an 80pin cable.
*/
if (!eighty_ninty_three(drive))
- mode = min(mode, (u8)1);
+ mode = min_t(u8, mode, 1);
return mode;
}
@@ -216,7 +216,7 @@ static void piix_tune_drive (ide_drive_t *drive, u8 pio)
{
ide_hwif_t *hwif = HWIF(drive);
struct pci_dev *dev = hwif->pci_dev;
- int is_slave = (&hwif->drives[1] == drive);
+ int is_slave = drive->dn & 1;
int master_port = hwif->channel ? 0x42 : 0x40;
int slave_port = 0x44;
unsigned long flags;
@@ -225,7 +225,7 @@ static void piix_tune_drive (ide_drive_t *drive, u8 pio)
static DEFINE_SPINLOCK(tune_lock);
int control = 0;
- /* ISP RTC */
+ /* ISP RTC */
static const u8 timings[][2]= {
{ 0, 0 },
{ 0, 0 },
@@ -233,7 +233,7 @@ static void piix_tune_drive (ide_drive_t *drive, u8 pio)
{ 2, 1 },
{ 2, 3 }, };
- pio = ide_get_best_pio_mode(drive, pio, 5, NULL);
+ pio = ide_get_best_pio_mode(drive, pio, 4, NULL);
/*
* Master vs slave is synchronized above us but the slave register is
@@ -243,25 +243,24 @@ static void piix_tune_drive (ide_drive_t *drive, u8 pio)
spin_lock_irqsave(&tune_lock, flags);
pci_read_config_word(dev, master_port, &master_data);
- if (pio >= 2)
+ if (pio > 1)
control |= 1; /* Programmable timing on */
if (drive->media == ide_disk)
control |= 4; /* Prefetch, post write */
- if (pio >= 3)
+ if (pio > 2)
control |= 2; /* IORDY */
if (is_slave) {
- master_data = master_data | 0x4000;
+ master_data |= 0x4000;
+ master_data &= ~0x0070;
if (pio > 1) {
/* enable PPE, IE and TIME */
master_data = master_data | (control << 4);
- } else {
- master_data &= ~0x0070;
}
pci_read_config_byte(dev, slave_port, &slave_data);
slave_data = slave_data & (hwif->channel ? 0x0f : 0xf0);
slave_data = slave_data | (((timings[pio][0] << 2) | timings[pio][1]) << (hwif->channel ? 4 : 0));
} else {
- master_data = master_data & 0xccf8;
+ master_data &= ~0x3307;
if (pio > 1) {
/* enable PPE, IE and TIME */
master_data = master_data | control;
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