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From: Sergei Shtylyov <sshtylyov@ru.mvista.com>
To: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Cc: Geller Sandor <wildy@petra.hos.u-szeged.hu>,
	Andrew Morton <akpm@linux-foundation.org>,
	linux-kernel@vger.kernel.org, linux-ide@vger.kernel.org
Subject: Re: HPT374 IDE problem with 2.6.21.* kernels
Date: Tue, 05 Jun 2007 18:14:46 +0400	[thread overview]
Message-ID: <46656FD6.6030305@ru.mvista.com> (raw)
In-Reply-To: <46655AEA.4020906@ru.mvista.com>

Hello, I wrote:

>> I felt inspired by this explanation (thanks!) and took a look at
>> hpt374-opensource-v2.10 vendor driver.  Here is something interesting:

>> glbdata.c:

>> ...
>> #ifdef CLOCK_66MHZ
>> ULONG setting370_66[] = {
>>         0xd029d5e,  0xd029d26,  0xc829ca6,  0xc829c84,  0xc829c62,
>>         0x2c829d2c, 0x2c829c66, 0x2c829c62,
>>         0x1c829c62, 0x1c9a9c62, 0x1c929c62, 0x1c8e9c62, 0x1c8a9c62,
>>         0x1c8a9c62/*0x1cae9c62*/, 0x1c869c62, 0x1c869c62,
>> };
>> ...

>> hpt366.c:

>> ...
>> static u32 sixty_six_base_hpt37x[] = {
>>         /* XFER_UDMA_6 */       0x1c869c62,
>>         /* XFER_UDMA_5 */       0x1cae9c62,     /* 0x1c8a9c62 */
>> ...

>> So we are using Dual ATA Clock for UDMA5 whereas vendor driver doesn't

>    This is so in all other HPT drivers (and HPT371N datasheet has the 
> same figures -- this chip is the only one supporting UDMA6 and having 
> the default DPLL clock > 50 MHz).

    What I meant to say was the only one I have a datasheet for. :-)

MBR, Sergei


  reply	other threads:[~2007-06-05 14:13 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <Pine.LNX.4.62.0705301112170.1260@petra.hos.u-szeged.hu>
2007-06-01 20:46 ` HPT374 IDE problem with 2.6.21.* kernels Andrew Morton
2007-06-01 20:53   ` Sergei Shtylyov
2007-06-01 21:13     ` Geller Sandor
2007-06-01 21:26       ` Sergei Shtylyov
2007-06-01 22:41         ` Geller Sandor
2007-06-02 23:38           ` Bartlomiej Zolnierkiewicz
2007-06-03 10:37             ` Geller Sandor
2007-06-03 17:36               ` Sergei Shtylyov
2007-06-05  1:00                 ` Bartlomiej Zolnierkiewicz
2007-06-05 12:45                   ` Sergei Shtylyov
2007-06-05 14:14                     ` Sergei Shtylyov [this message]
2007-06-08 12:33                     ` Bartlomiej Zolnierkiewicz
2007-06-09 10:13                       ` Sergei Shtylyov
2007-06-05 20:08                 ` Sergei Shtylyov

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