[PATCH] AT91RM9200 NAND support

[Savin Zlobec]

Thomas Gleixner wrote:

>Savin,
>
>On Tue, 2006-06-20 at 14:28 +0200, Savin Zlobec wrote:
>  
>
>>Chip not ready in nand_command():
>>Last caller: c012aa04 (nand_base.c:389)
>>Last command: 0x70
>>Current caller: c012c0e8 (nand_base.c:1720)
>>Current command: 0x60
>>
>>384     static int nand_check_wp(struct mtd_info *mtd)
>>385     {
>>386             struct nand_chip *chip = mtd->priv;
>>387             /* Check the WP bit */
>>388             chip->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1);
>>389             return (chip->read_byte(mtd) & NAND_STATUS_WP) ? 0 : 1;
>>390     }
>>
>>1715    static void single_erase_cmd(struct mtd_info *mtd, int page)
>>1716    {
>>1717            struct nand_chip *chip = mtd->priv;
>>1718            /* Send commands to erase a block */
>>1719            chip->cmdfunc(mtd, NAND_CMD_ERASE1, -1, page);
>>1720            chip->cmdfunc(mtd, NAND_CMD_ERASE2, -1, -1);
>>1721    }
>>    
>>
>
>The status command does not influence ready/busy. The one before that
>nand_check_wp() call, is a chip reset command, but we wait for the chip
>to become ready again.
>
>Please give me the exact part number, so I can lookup the data sheet.
>  
>
The part is K9F5608U0C. And I've got some more debug info.

Thanks,
    savin

Chip not ready in nand_command():
Last caller: c012afa8 (nand_base.c:736)
Last command: 0x70
Current caller: c012bf8c (nand_base.c:1374)
Current command: 0x80

716     static int nand_wait(struct mtd_info *mtd, struct nand_chip 
*chip, int state)
...
733             if ((state == FL_ERASING) && (chip->options & NAND_IS_AND))
734                     chip->cmdfunc(mtd, NAND_CMD_STATUS_MULTI, -1, -1);
735             else
736                     chip->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1);

1367    static int nand_write_page(struct mtd_info *mtd, struct 
nand_chip *chip,
1368                               const uint8_t *buf, int page, int cached)
1369    {
1370            int status;
1371
1372            chip->cmdfunc(mtd, NAND_CMD_SEQIN, 0x00, page);
1373
1374            chip->ecc.write_page(mtd, chip, buf);

Chip not ready in nand_command():
Last caller: c012afa8 (nand_base.c:736)
Last command: 0x70
Current caller: c012b644 (nand_base.c:988)
Current command: 0x00

953     static int nand_do_read_ops(struct mtd_info *mtd, loff_t from,
...
987                             if (likely(sndcmd)) {
988                                     chip->cmdfunc(mtd, 
NAND_CMD_READ0, 0x00, page);
989                                     sndcmd = 0;
990                             }