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mtd: vf610_nfc: remove read on SEQIN

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Since we do not support sub-page writes anyway, reading the page
back to the controller on SEQIN command is not required. Remove
the page read on SEQIN.

However, the column/page values relevant to the SEQIN command, hence
set the column/row address on SEQIN command.

Signed-off-by: Stefan Agner <stefan@agner.ch>
This commit is contained in:
Stefan Agner 2015-05-08 19:07:07 +02:00 committed by Scott Wood
parent f55bc296a8
commit 6fcfd1e890
1 changed files with 8 additions and 6 deletions
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14
drivers/mtd/nand/vf610_nfc.c
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@ -345,24 +345,26 @@ static void vf610_nfc_command(struct mtd_info *mtd, unsigned command,
nfc->alt_buf = 0;
switch (command) {
case NAND_CMD_SEQIN:
/* Use valid column/page from preread... */
vf610_nfc_addr_cycle(mtd, column, page);
/*
* SEQIN => data => PAGEPROG sequence is done by the controller
* hence we do not need to issue the command here...
*/
return;
case NAND_CMD_PAGEPROG:
vf610_nfc_transfer_size(nfc->regs, nfc->page_sz);
vf610_nfc_send_commands(nfc->regs, NAND_CMD_SEQIN,
command, PROGRAM_PAGE_CMD_CODE);
vf610_nfc_addr_cycle(mtd, column, page);
break;
case NAND_CMD_RESET:
vf610_nfc_transfer_size(nfc->regs, 0);
vf610_nfc_send_command(nfc->regs, command, RESET_CMD_CODE);
break;
/*
* NFC does not support sub-page reads and writes,
* so emulate them using full page transfers.
*/
case NAND_CMD_READOOB:
nfc->spareonly = 1;
case NAND_CMD_SEQIN: /* Pre-read for partial writes. */
case NAND_CMD_READ0:
column = 0;
vf610_nfc_transfer_size(nfc->regs, nfc->page_sz);