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| author | Sergei Shtylyov <sshtylyov@ru.mvista.com> | 2007-02-07 18:18:20 +0100 |
|---|---|---|
| committer | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2007-02-07 18:18:20 +0100 |
| commit | 6273d26a5b280cb96b804424de323560b301ca51 (patch) | |
| tree | 69c79073c85bab2767db45fe33014fbda8572e7b /drivers | |
| parent | hpt366: init code rewrite (diff) | |
| download | linux-6273d26a5b280cb96b804424de323560b301ca51.tar.xz linux-6273d26a5b280cb96b804424de323560b301ca51.zip | |
hpt366: HPT36x PCI clock detection fix
Fix minor coding mistake in the HPT36x PCI clock detection code noticed by
Bartlomiej Zolnierkiewicz -- it always reported 33 MHz due to the missing
'break' statements. This, however, most probably never mattered -- in fact, I
was thinking of removing the 25/40 MHz cases completely since HPT36x BIOSes
didn't seem to set any other value than 7 into the 'cmd_high_time' field, i.e.
supported only 33 MHz PCI.
Note that in the original driver there was another bug: 25 and 40 MHz cases
were interchanged. Since the 'cmd_high_time' field is in units of PCI clocks,
a lower clock count just *cannot* correspond to a higher frequency, i. e. it
should be 5 for 25 MHz PCI and 9 for 40 MHz PCI, not the other way around.
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/hpt366.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/ide/pci/hpt366.c b/drivers/ide/pci/hpt366.c index 4350e3371360..05be8fadda7a 100644 --- a/drivers/ide/pci/hpt366.c +++ b/drivers/ide/pci/hpt366.c @@ -1,5 +1,5 @@ /* - * linux/drivers/ide/pci/hpt366.c Version 1.00 Jun 25, 2006 + * linux/drivers/ide/pci/hpt366.c Version 1.01 Dec 23, 2006 * * Copyright (C) 1999-2003 Andre Hedrick <andre@linux-ide.org> * Portions Copyright (C) 2001 Sun Microsystems, Inc. @@ -107,7 +107,8 @@ * frequency * - switch to using the DPLL clock and enable UltraATA/133 mode by default on * anything newer than HPT370/A - * - fold PCI clock detection and DPLL setup code into init_chipset_hpt366(); + * - fold PCI clock detection and DPLL setup code into init_chipset_hpt366(), + * also fixing the interchanged 25/40 MHz PCI clock cases for HPT36x chips; * unify HPT36x/37x timing setup code and the speedproc handlers by joining * the register setting lists into the table indexed by the clock selected * Sergei Shtylyov, <sshtylyov@ru.mvista.com> or <source@mvista.com> @@ -1125,11 +1126,14 @@ static unsigned int __devinit init_chipset_hpt366(struct pci_dev *dev, const cha switch((itr1 >> 8) & 0x07) { case 0x09: pci_clk = 40; + break; case 0x05: pci_clk = 25; + break; case 0x07: default: pci_clk = 33; + break; } } |