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D2: Make the nand driver's sanity checks a little more... sane. This should allow booting on a few older D2's.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@17805 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Rob Purchase 2008-06-27 12:35:50 +00:00
parent 0494157cf4
commit 38b02f3d7a
1 changed files with 4 additions and 7 deletions
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11
firmware/target/arm/tcc780x/ata-nand-tcc780x.c
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@ -465,12 +465,9 @@ static void nand_get_chip_info(void)
/*
Sanity checks:
1. "BMP" tag at block 0, page 0, offset <page_size> [always present]
2. Byte at <page_size>+4 contains number of banks [or 0xff if 1 bank]
If this is confirmed for all D2s we can simplify the above code and
also remove the icky nand_read_uid() function.
2. On most D2s, <page_size>+3 is 'M' and <page_size>+4 is no. of banks.
This is not present on some older players (formatted with early FW?)
*/
nand_read_raw(0, /* bank */
@ -479,8 +476,8 @@ static void nand_get_chip_info(void)
8, id_buf);
if (strncmp(id_buf, "BMP", 3)) panicf("BMP tag not present");
if (total_banks > 1)
if (id_buf[3] == 'M')
{
if (id_buf[4] != total_banks) panicf("BMPM total_banks mismatch");
}