1203 lines
29 KiB
C
1203 lines
29 KiB
C
/*
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* Handles the M-Systems DiskOnChip G3 chip
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*
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* Copyright (C) 2011 Robert Jarzmik
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* Taken from linux kernel.
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*/
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#include <common.h>
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#include <init.h>
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#include <driver.h>
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#include <errno.h>
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#include <malloc.h>
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#include <clock.h>
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#include <io.h>
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#include <linux/kernel.h>
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#include <linux/mtd/mtd.h>
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#include <linux/err.h>
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#include <linux/bitrev.h>
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#include <linux/bch.h>
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#include "docg3.h"
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static unsigned reliable_mode;
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/**
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* struct docg3_bch - BCH engine
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*/
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static struct bch_control *docg3_bch;
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struct mtd_info *docg3_floors[DOC_MAX_NBFLOORS];
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static inline u8 doc_readb(struct docg3 *docg3, u16 reg)
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{
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u8 val = readb(docg3->base + reg);
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doc_dbg("readb(%04x) -> %02x\n", reg, val);
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return val;
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}
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static inline u16 doc_readw(struct docg3 *docg3, u16 reg)
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{
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u16 val = readw(docg3->base + reg);
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doc_dbg("readb(%04x) -> %04x\n", reg, val);
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return val;
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}
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static inline void doc_writeb(struct docg3 *docg3, u8 val, u16 reg)
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{
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doc_dbg("writeb(%02x into %04x)\n", val, reg);
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writeb(val, docg3->base + reg);
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}
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static inline void doc_writew(struct docg3 *docg3, u16 val, u16 reg)
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{
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doc_dbg("writew(%04x into %04x)\n", val, reg);
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writew(val, docg3->base + reg);
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}
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static inline void doc_flash_command(struct docg3 *docg3, u8 cmd)
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{
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doc_writeb(docg3, cmd, DOC_FLASHCOMMAND);
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}
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static inline void doc_flash_sequence(struct docg3 *docg3, u8 seq)
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{
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doc_writeb(docg3, seq, DOC_FLASHSEQUENCE);
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}
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static inline void doc_flash_address(struct docg3 *docg3, u8 addr)
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{
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doc_writeb(docg3, addr, DOC_FLASHADDRESS);
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}
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static int doc_register_readb(struct docg3 *docg3, int reg)
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{
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u8 val;
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doc_writew(docg3, reg, DOC_READADDRESS);
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val = doc_readb(docg3, reg);
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doc_vdbg("Read register %04x : %02x\n", reg, val);
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return val;
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}
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static int doc_register_readw(struct docg3 *docg3, int reg)
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{
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u16 val;
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doc_writew(docg3, reg, DOC_READADDRESS);
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val = doc_readw(docg3, reg);
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doc_vdbg("Read register %04x : %04x\n", reg, val);
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return val;
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}
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static void doc_delay(struct docg3 *docg3, int nbNOPs)
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{
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int i;
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doc_vdbg("NOP x %d\n", nbNOPs);
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for (i = 0; i < nbNOPs; i++)
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doc_writeb(docg3, 0, DOC_NOP);
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}
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static int is_prot_seq_error(struct docg3 *docg3)
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{
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int ctrl;
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ctrl = doc_register_readb(docg3, DOC_FLASHCONTROL);
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return ctrl & (DOC_CTRL_PROTECTION_ERROR | DOC_CTRL_SEQUENCE_ERROR);
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}
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static int doc_is_ready(struct docg3 *docg3)
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{
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int ctrl;
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ctrl = doc_register_readb(docg3, DOC_FLASHCONTROL);
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return ctrl & DOC_CTRL_FLASHREADY;
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}
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static int doc_wait_ready(struct docg3 *docg3)
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{
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int maxWaitCycles = 100;
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do {
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doc_delay(docg3, 4);
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} while (!doc_is_ready(docg3) && maxWaitCycles--);
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doc_delay(docg3, 2);
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if (maxWaitCycles > 0)
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return 0;
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else
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return -EIO;
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}
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static int doc_reset_seq(struct docg3 *docg3)
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{
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int ret;
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doc_writeb(docg3, 0x10, DOC_FLASHCONTROL);
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doc_flash_sequence(docg3, DOC_SEQ_RESET);
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doc_flash_command(docg3, DOC_CMD_RESET);
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doc_delay(docg3, 2);
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ret = doc_wait_ready(docg3);
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doc_dbg("doc_reset_seq() -> isReady=%s\n", ret ? "false" : "true");
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return ret;
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}
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static void doc_read_data_area(struct docg3 *docg3, void *buf, int len,
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int first)
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{
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int i, cdr, len4;
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u16 data16, *dst16;
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u8 data8, *dst8;
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doc_dbg("doc_read_data_area(buf=%p, len=%d)\n", buf, len);
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cdr = len & 0x1;
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len4 = len - cdr;
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if (first)
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doc_writew(docg3, DOC_IOSPACE_DATA, DOC_READADDRESS);
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dst16 = buf;
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for (i = 0; i < len4; i += 2) {
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data16 = doc_readw(docg3, DOC_IOSPACE_DATA);
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if (dst16) {
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*dst16 = data16;
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dst16++;
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}
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}
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if (cdr) {
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doc_writew(docg3, DOC_IOSPACE_DATA | DOC_READADDR_ONE_BYTE,
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DOC_READADDRESS);
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doc_delay(docg3, 1);
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dst8 = (u8 *)dst16;
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for (i = 0; i < cdr; i++) {
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data8 = doc_readb(docg3, DOC_IOSPACE_DATA);
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if (dst8) {
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*dst8 = data8;
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dst8++;
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}
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}
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}
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}
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static void doc_set_reliable_mode(struct docg3 *docg3)
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{
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static char *strmode[] = { "normal", "fast", "reliable", "invalid" };
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doc_dbg("doc_set_reliable_mode(%s)\n", strmode[docg3->reliable]);
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switch (docg3->reliable) {
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case 0:
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break;
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case 1:
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doc_flash_sequence(docg3, DOC_SEQ_SET_FASTMODE);
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doc_flash_command(docg3, DOC_CMD_FAST_MODE);
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break;
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case 2:
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doc_flash_sequence(docg3, DOC_SEQ_SET_RELIABLEMODE);
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doc_flash_command(docg3, DOC_CMD_FAST_MODE);
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doc_flash_command(docg3, DOC_CMD_RELIABLE_MODE);
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break;
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default:
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doc_err("doc_set_reliable_mode(): invalid mode\n");
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break;
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}
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doc_delay(docg3, 2);
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}
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static void doc_set_asic_mode(struct docg3 *docg3, u8 mode)
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{
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int i;
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for (i = 0; i < 12; i++)
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doc_readb(docg3, DOC_IOSPACE_IPL);
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mode |= DOC_ASICMODE_MDWREN;
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doc_dbg("doc_set_asic_mode(%02x)\n", mode);
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doc_writeb(docg3, mode, DOC_ASICMODE);
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doc_writeb(docg3, ~mode, DOC_ASICMODECONFIRM);
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doc_delay(docg3, 1);
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}
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static void doc_set_device_id(struct docg3 *docg3, int id)
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{
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u8 ctrl;
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doc_dbg("doc_set_device_id(%d)\n", id);
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doc_writeb(docg3, id, DOC_DEVICESELECT);
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ctrl = doc_register_readb(docg3, DOC_FLASHCONTROL);
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ctrl &= ~DOC_CTRL_VIOLATION;
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ctrl |= DOC_CTRL_CE;
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doc_writeb(docg3, ctrl, DOC_FLASHCONTROL);
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}
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static int doc_set_extra_page_mode(struct docg3 *docg3)
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{
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int fctrl;
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doc_dbg("doc_set_extra_page_mode()\n");
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doc_flash_sequence(docg3, DOC_SEQ_PAGE_SIZE_532);
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doc_flash_command(docg3, DOC_CMD_PAGE_SIZE_532);
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doc_delay(docg3, 2);
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fctrl = doc_register_readb(docg3, DOC_FLASHCONTROL);
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if (fctrl & (DOC_CTRL_PROTECTION_ERROR | DOC_CTRL_SEQUENCE_ERROR))
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return -EIO;
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else
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return 0;
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}
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static void doc_setup_addr_sector(struct docg3 *docg3, int sector)
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{
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doc_delay(docg3, 1);
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doc_flash_address(docg3, sector & 0xff);
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doc_flash_address(docg3, (sector >> 8) & 0xff);
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doc_flash_address(docg3, (sector >> 16) & 0xff);
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doc_delay(docg3, 1);
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}
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static int doc_read_seek(struct docg3 *docg3, int block0, int block1, int page,
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int wear, int ofs)
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{
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int sector, ret = 0;
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doc_dbg("doc_seek(blocks=(%d,%d), page=%d, ofs=%d, wear=%d)\n",
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block0, block1, page, ofs, wear);
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if (!wear && (ofs < 2 * DOC_LAYOUT_PAGE_SIZE)) {
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doc_flash_sequence(docg3, DOC_SEQ_SET_PLANE1);
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doc_flash_command(docg3, DOC_CMD_READ_PLANE1);
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doc_delay(docg3, 2);
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} else {
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doc_flash_sequence(docg3, DOC_SEQ_SET_PLANE2);
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doc_flash_command(docg3, DOC_CMD_READ_PLANE2);
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doc_delay(docg3, 2);
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}
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doc_set_reliable_mode(docg3);
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if (wear)
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ret = doc_set_extra_page_mode(docg3);
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if (ret)
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goto out;
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doc_flash_sequence(docg3, DOC_SEQ_READ);
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sector = (block0 << DOC_ADDR_BLOCK_SHIFT) + (page & DOC_ADDR_PAGE_MASK);
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doc_flash_command(docg3, DOC_CMD_PROG_BLOCK_ADDR);
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doc_setup_addr_sector(docg3, sector);
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sector = (block1 << DOC_ADDR_BLOCK_SHIFT) + (page & DOC_ADDR_PAGE_MASK);
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doc_flash_command(docg3, DOC_CMD_PROG_BLOCK_ADDR);
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doc_setup_addr_sector(docg3, sector);
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doc_delay(docg3, 1);
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out:
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return ret;
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}
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static int doc_read_page_ecc_init(struct docg3 *docg3, int len)
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{
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doc_writew(docg3, DOC_ECCCONF0_READ_MODE
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| DOC_ECCCONF0_BCH_ENABLE | DOC_ECCCONF0_HAMMING_ENABLE
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| (len & DOC_ECCCONF0_DATA_BYTES_MASK),
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DOC_ECCCONF0);
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doc_delay(docg3, 4);
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doc_register_readb(docg3, DOC_FLASHCONTROL);
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return doc_wait_ready(docg3);
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}
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static void doc_hamming_ecc_init(struct docg3 *docg3, int nb_bytes)
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{
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u8 ecc_conf1;
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ecc_conf1 = doc_register_readb(docg3, DOC_ECCCONF1);
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ecc_conf1 &= ~DOC_ECCCONF1_HAMMING_BITS_MASK;
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ecc_conf1 |= (nb_bytes & DOC_ECCCONF1_HAMMING_BITS_MASK);
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doc_writeb(docg3, ecc_conf1, DOC_ECCCONF1);
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}
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static int doc_ecc_bch_fix_data(struct docg3 *docg3, void *buf, u8 *hwecc)
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{
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u8 ecc[DOC_ECC_BCH_SIZE];
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int errorpos[DOC_ECC_BCH_T], i, numerrs;
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for (i = 0; i < DOC_ECC_BCH_SIZE; i++)
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ecc[i] = bitrev8(hwecc[i]);
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numerrs = decode_bch(docg3_bch, NULL, DOC_ECC_BCH_COVERED_BYTES,
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NULL, ecc, NULL, errorpos);
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BUG_ON(numerrs == -EINVAL);
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if (numerrs < 0)
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goto out;
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for (i = 0; i < numerrs; i++)
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errorpos[i] = (errorpos[i] & ~7) | (7 - (errorpos[i] & 7));
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for (i = 0; i < numerrs; i++)
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if (errorpos[i] < DOC_ECC_BCH_COVERED_BYTES*8)
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/* error is located in data, correct it */
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change_bit(errorpos[i], buf);
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out:
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doc_dbg("doc_ecc_bch_fix_data: flipped %d bits\n", numerrs);
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return numerrs;
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}
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static int doc_read_page_prepare(struct docg3 *docg3, int block0, int block1,
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int page, int offset)
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{
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int wear_area = 0, ret = 0;
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doc_dbg("doc_read_page_prepare(blocks=(%d,%d), page=%d, ofsInPage=%d)\n",
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block0, block1, page, offset);
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if (offset >= DOC_LAYOUT_WEAR_OFFSET)
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wear_area = 1;
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if (!wear_area && offset > (DOC_LAYOUT_PAGE_OOB_SIZE * 2))
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return -EINVAL;
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doc_set_device_id(docg3, docg3->device_id);
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ret = doc_reset_seq(docg3);
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if (ret)
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goto err;
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/* Program the flash address block and page */
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ret = doc_read_seek(docg3, block0, block1, page, wear_area, offset);
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if (ret)
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goto err;
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doc_flash_command(docg3, DOC_CMD_READ_ALL_PLANES);
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doc_delay(docg3, 2);
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doc_wait_ready(docg3);
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doc_flash_command(docg3, DOC_CMD_SET_ADDR_READ);
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doc_delay(docg3, 1);
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if (offset >= DOC_LAYOUT_PAGE_SIZE * 2)
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offset -= 2 * DOC_LAYOUT_PAGE_SIZE;
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doc_flash_address(docg3, offset >> 2);
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doc_delay(docg3, 1);
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doc_wait_ready(docg3);
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doc_flash_command(docg3, DOC_CMD_READ_FLASH);
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return 0;
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err:
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doc_writeb(docg3, 0, DOC_DATAEND);
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doc_delay(docg3, 2);
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return -EIO;
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}
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static int doc_read_page_getbytes(struct docg3 *docg3, int len, u_char *buf,
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int first, int last_odd)
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{
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if (last_odd && len > 0) {
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doc_read_data_area(docg3, buf, 1, first);
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doc_read_data_area(docg3, buf ? buf + 1 : buf, len - 1, 0);
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} else {
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doc_read_data_area(docg3, buf, len, first);
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}
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doc_delay(docg3, 2);
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return len;
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}
|
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|
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static void doc_get_bch_hw_ecc(struct docg3 *docg3, u8 *hwecc)
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{
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int i;
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for (i = 0; i < DOC_ECC_BCH_SIZE; i++)
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hwecc[i] = doc_register_readb(docg3, DOC_BCH_HW_ECC(i));
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}
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|
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static void doc_page_finish(struct docg3 *docg3)
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{
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doc_writeb(docg3, 0, DOC_DATAEND);
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doc_delay(docg3, 2);
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}
|
|
|
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static void doc_read_page_finish(struct docg3 *docg3)
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{
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doc_page_finish(docg3);
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doc_set_device_id(docg3, 0);
|
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}
|
|
|
|
static void calc_block_sector(loff_t from, int *block0, int *block1, int *page,
|
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int *ofs, int reliable)
|
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{
|
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uint sector, pages_biblock;
|
|
|
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pages_biblock = DOC_LAYOUT_PAGES_PER_BLOCK * DOC_LAYOUT_NBPLANES;
|
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if (reliable == 1 || reliable == 2)
|
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pages_biblock /= 2;
|
|
|
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sector = from / DOC_LAYOUT_PAGE_SIZE;
|
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*block0 = sector / pages_biblock * DOC_LAYOUT_NBPLANES;
|
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*block1 = *block0 + 1;
|
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*page = sector % pages_biblock;
|
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*page /= DOC_LAYOUT_NBPLANES;
|
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if (reliable == 1 || reliable == 2)
|
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*page *= 2;
|
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if (sector % 2)
|
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*ofs = DOC_LAYOUT_PAGE_OOB_SIZE;
|
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else
|
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*ofs = 0;
|
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}
|
|
|
|
static int doc_read_oob(struct mtd_info *mtd, loff_t from,
|
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struct mtd_oob_ops *ops)
|
|
{
|
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struct docg3 *docg3 = mtd->priv;
|
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int block0, block1, page, ret, skip, ofs = 0;
|
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u8 *oobbuf = ops->oobbuf;
|
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u8 *buf = ops->datbuf;
|
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size_t len, ooblen, nbdata, nboob;
|
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u8 hwecc[DOC_ECC_BCH_SIZE], eccconf1;
|
|
|
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if (buf)
|
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len = ops->len;
|
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else
|
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len = 0;
|
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if (oobbuf)
|
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ooblen = ops->ooblen;
|
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else
|
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ooblen = 0;
|
|
|
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if (oobbuf && ops->mode == MTD_OOB_PLACE)
|
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oobbuf += ops->ooboffs;
|
|
|
|
doc_dbg("doc_read_oob(from=%lld, mode=%d, data=(%p:%zu), oob=(%p:%zu))\n",
|
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from, ops->mode, buf, len, oobbuf, ooblen);
|
|
if (ooblen % DOC_LAYOUT_OOB_SIZE)
|
|
return -EINVAL;
|
|
|
|
ret = -EINVAL;
|
|
calc_block_sector(from + len, &block0, &block1, &page, &ofs,
|
|
docg3->reliable);
|
|
if (block1 > docg3->max_block)
|
|
goto err;
|
|
|
|
ops->oobretlen = 0;
|
|
ops->retlen = 0;
|
|
ret = 0;
|
|
skip = from % DOC_LAYOUT_PAGE_SIZE;
|
|
while (!ret && (len > 0 || ooblen > 0)) {
|
|
calc_block_sector(from, &block0, &block1, &page, &ofs,
|
|
docg3->reliable);
|
|
nbdata = min_t(size_t, len, DOC_LAYOUT_PAGE_SIZE - skip);
|
|
nboob = min_t(size_t, ooblen, (size_t)DOC_LAYOUT_OOB_SIZE);
|
|
ret = doc_read_page_prepare(docg3, block0, block1, page, ofs);
|
|
if (ret < 0)
|
|
goto err;
|
|
ret = doc_read_page_ecc_init(docg3, DOC_ECC_BCH_TOTAL_BYTES);
|
|
if (ret < 0)
|
|
goto err_in_read;
|
|
ret = doc_read_page_getbytes(docg3, skip, NULL, 1, 0);
|
|
if (ret < skip)
|
|
goto err_in_read;
|
|
ret = doc_read_page_getbytes(docg3, nbdata, buf, 0, skip % 2);
|
|
if (ret < nbdata)
|
|
goto err_in_read;
|
|
doc_read_page_getbytes(docg3,
|
|
DOC_LAYOUT_PAGE_SIZE - nbdata - skip,
|
|
NULL, 0, (skip + nbdata) % 2);
|
|
ret = doc_read_page_getbytes(docg3, nboob, oobbuf, 0, 0);
|
|
if (ret < nboob)
|
|
goto err_in_read;
|
|
doc_read_page_getbytes(docg3, DOC_LAYOUT_OOB_SIZE - nboob,
|
|
NULL, 0, nboob % 2);
|
|
|
|
doc_get_bch_hw_ecc(docg3, hwecc);
|
|
eccconf1 = doc_register_readb(docg3, DOC_ECCCONF1);
|
|
|
|
if (nboob >= DOC_LAYOUT_OOB_SIZE) {
|
|
doc_dbg("OOB - INFO: %02x:%02x:%02x:%02x:%02x:%02x:%02x\n",
|
|
oobbuf[0], oobbuf[1], oobbuf[2], oobbuf[3],
|
|
oobbuf[4], oobbuf[5], oobbuf[6]);
|
|
doc_dbg("OOB - HAMMING: %02x\n", oobbuf[7]);
|
|
doc_dbg("OOB - BCH_ECC: %02x:%02x:%02x:%02x:%02x:%02x:%02x\n",
|
|
oobbuf[8], oobbuf[9], oobbuf[10], oobbuf[11],
|
|
oobbuf[12], oobbuf[13], oobbuf[14]);
|
|
doc_dbg("OOB - UNUSED: %02x\n", oobbuf[15]);
|
|
}
|
|
doc_dbg("ECC checks: ECCConf1=%x\n", eccconf1);
|
|
doc_dbg("ECC HW_ECC: %02x:%02x:%02x:%02x:%02x:%02x:%02x\n",
|
|
hwecc[0], hwecc[1], hwecc[2], hwecc[3], hwecc[4],
|
|
hwecc[5], hwecc[6]);
|
|
|
|
ret = -EIO;
|
|
if (is_prot_seq_error(docg3))
|
|
goto err_in_read;
|
|
ret = 0;
|
|
if ((block0 >= DOC_LAYOUT_BLOCK_FIRST_DATA) &&
|
|
(eccconf1 & DOC_ECCCONF1_BCH_SYNDROM_ERR) &&
|
|
(eccconf1 & DOC_ECCCONF1_PAGE_IS_WRITTEN) &&
|
|
(ops->mode != MTD_OOB_RAW) &&
|
|
(nbdata == DOC_LAYOUT_PAGE_SIZE)) {
|
|
ret = doc_ecc_bch_fix_data(docg3, buf, hwecc);
|
|
if (ret < 0) {
|
|
mtd->ecc_stats.failed++;
|
|
ret = -EBADMSG;
|
|
}
|
|
if (ret > 0) {
|
|
mtd->ecc_stats.corrected += ret;
|
|
ret = -EUCLEAN;
|
|
}
|
|
}
|
|
|
|
doc_read_page_finish(docg3);
|
|
ops->retlen += nbdata;
|
|
ops->oobretlen += nboob;
|
|
buf += nbdata;
|
|
oobbuf += nboob;
|
|
len -= nbdata;
|
|
ooblen -= nboob;
|
|
from += DOC_LAYOUT_PAGE_SIZE;
|
|
skip = 0;
|
|
}
|
|
|
|
return ret;
|
|
err_in_read:
|
|
doc_read_page_finish(docg3);
|
|
err:
|
|
return ret;
|
|
}
|
|
|
|
static int doc_read(struct mtd_info *mtd, loff_t from, size_t len,
|
|
size_t *retlen, u_char *buf)
|
|
{
|
|
struct mtd_oob_ops ops;
|
|
size_t ret;
|
|
|
|
memset(&ops, 0, sizeof(ops));
|
|
ops.datbuf = buf;
|
|
ops.len = len;
|
|
ops.mode = MTD_OOB_AUTO;
|
|
|
|
ret = doc_read_oob(mtd, from, &ops);
|
|
*retlen = ops.retlen;
|
|
return ret;
|
|
}
|
|
|
|
static int doc_reload_bbt(struct docg3 *docg3)
|
|
{
|
|
int block = DOC_LAYOUT_BLOCK_BBT;
|
|
int ret = 0, nbpages, page;
|
|
u_char *buf = docg3->bbt;
|
|
|
|
nbpages = DIV_ROUND_UP(docg3->max_block + 1, 8 * DOC_LAYOUT_PAGE_SIZE);
|
|
for (page = 0; !ret && (page < nbpages); page++) {
|
|
ret = doc_read_page_prepare(docg3, block, block + 1,
|
|
page + DOC_LAYOUT_PAGE_BBT, 0);
|
|
if (!ret)
|
|
ret = doc_read_page_ecc_init(docg3,
|
|
DOC_LAYOUT_PAGE_SIZE);
|
|
if (!ret)
|
|
doc_read_page_getbytes(docg3, DOC_LAYOUT_PAGE_SIZE,
|
|
buf, 1, 0);
|
|
buf += DOC_LAYOUT_PAGE_SIZE;
|
|
}
|
|
doc_read_page_finish(docg3);
|
|
return ret;
|
|
}
|
|
|
|
static int doc_block_isbad(struct mtd_info *mtd, loff_t from)
|
|
{
|
|
struct docg3 *docg3 = mtd->priv;
|
|
int block0, block1, page, ofs, is_good;
|
|
|
|
calc_block_sector(from, &block0, &block1, &page, &ofs,
|
|
docg3->reliable);
|
|
doc_dbg("doc_block_isbad(from=%lld) => block=(%d,%d), page=%d, ofs=%d\n",
|
|
from, block0, block1, page, ofs);
|
|
|
|
if (block0 < DOC_LAYOUT_BLOCK_FIRST_DATA)
|
|
return 0;
|
|
if (block1 > docg3->max_block)
|
|
return -EINVAL;
|
|
|
|
is_good = docg3->bbt[block0 >> 3] & (1 << (block0 & 0x7));
|
|
return !is_good;
|
|
}
|
|
|
|
#ifdef CONFIG_MTD_WRITE
|
|
static int doc_guess_autoecc(struct mtd_oob_ops *ops)
|
|
{
|
|
int autoecc;
|
|
|
|
switch (ops->mode) {
|
|
case MTD_OOB_PLACE:
|
|
case MTD_OOB_AUTO:
|
|
autoecc = 1;
|
|
break;
|
|
case MTD_OOB_RAW:
|
|
autoecc = 0;
|
|
break;
|
|
default:
|
|
autoecc = -EINVAL;
|
|
}
|
|
return autoecc;
|
|
}
|
|
|
|
static void doc_fill_autooob(u8 *dst, u8 *oobsrc)
|
|
{
|
|
memcpy(dst, oobsrc, DOC_LAYOUT_OOB_PAGEINFO_SZ);
|
|
dst[DOC_LAYOUT_OOB_UNUSED_OFS] = oobsrc[DOC_LAYOUT_OOB_PAGEINFO_SZ];
|
|
}
|
|
|
|
static int doc_backup_oob(struct docg3 *docg3, loff_t to,
|
|
struct mtd_oob_ops *ops)
|
|
{
|
|
int ooblen = ops->ooblen, autoecc;
|
|
|
|
if (ooblen != DOC_LAYOUT_OOB_SIZE)
|
|
return -EINVAL;
|
|
autoecc = doc_guess_autoecc(ops);
|
|
if (autoecc < 0)
|
|
return autoecc;
|
|
|
|
docg3->oob_write_ofs = to;
|
|
docg3->oob_autoecc = autoecc;
|
|
if (ops->mode == MTD_OOB_AUTO) {
|
|
doc_fill_autooob(docg3->oob_write_buf, ops->oobbuf);
|
|
ops->oobretlen = 8;
|
|
} else {
|
|
memcpy(docg3->oob_write_buf, ops->oobbuf, DOC_LAYOUT_OOB_SIZE);
|
|
ops->oobretlen = DOC_LAYOUT_OOB_SIZE;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void doc_write_data_area(struct docg3 *docg3, const void *buf, int len)
|
|
{
|
|
int i, cdr, len4;
|
|
u16 *src16;
|
|
u8 *src8;
|
|
|
|
doc_dbg("doc_write_data_area(buf=%p, len=%d)\n", buf, len);
|
|
cdr = len & 0x3;
|
|
len4 = len - cdr;
|
|
|
|
doc_writew(docg3, DOC_IOSPACE_DATA, DOC_READADDRESS);
|
|
src16 = (u16 *)buf;
|
|
for (i = 0; i < len4; i += 2) {
|
|
doc_writew(docg3, *src16, DOC_IOSPACE_DATA);
|
|
src16++;
|
|
}
|
|
|
|
src8 = (u8 *)src16;
|
|
for (i = 0; i < cdr; i++) {
|
|
doc_writew(docg3, DOC_IOSPACE_DATA | DOC_READADDR_ONE_BYTE,
|
|
DOC_READADDRESS);
|
|
doc_writeb(docg3, *src8, DOC_IOSPACE_DATA);
|
|
src8++;
|
|
}
|
|
}
|
|
|
|
static void doc_setup_writeaddr_sector(struct docg3 *docg3, int sector, int ofs)
|
|
{
|
|
ofs = ofs >> 2;
|
|
doc_delay(docg3, 1);
|
|
doc_flash_address(docg3, ofs & 0xff);
|
|
doc_flash_address(docg3, sector & 0xff);
|
|
doc_flash_address(docg3, (sector >> 8) & 0xff);
|
|
doc_flash_address(docg3, (sector >> 16) & 0xff);
|
|
doc_delay(docg3, 1);
|
|
}
|
|
|
|
static int doc_write_seek(struct docg3 *docg3, int block0, int block1, int page,
|
|
int ofs)
|
|
{
|
|
int ret = 0, sector;
|
|
|
|
doc_dbg("doc_write_seek(blocks=(%d,%d), page=%d, ofs=%d)\n",
|
|
block0, block1, page, ofs);
|
|
|
|
doc_set_reliable_mode(docg3);
|
|
|
|
if (ofs < 2 * DOC_LAYOUT_PAGE_SIZE) {
|
|
doc_flash_sequence(docg3, DOC_SEQ_SET_PLANE1);
|
|
doc_flash_command(docg3, DOC_CMD_READ_PLANE1);
|
|
doc_delay(docg3, 2);
|
|
} else {
|
|
doc_flash_sequence(docg3, DOC_SEQ_SET_PLANE2);
|
|
doc_flash_command(docg3, DOC_CMD_READ_PLANE2);
|
|
doc_delay(docg3, 2);
|
|
}
|
|
|
|
doc_flash_sequence(docg3, DOC_SEQ_PAGE_SETUP);
|
|
doc_flash_command(docg3, DOC_CMD_PROG_CYCLE1);
|
|
|
|
sector = (block0 << DOC_ADDR_BLOCK_SHIFT) + (page & DOC_ADDR_PAGE_MASK);
|
|
doc_setup_writeaddr_sector(docg3, sector, ofs);
|
|
|
|
doc_flash_command(docg3, DOC_CMD_PROG_CYCLE3);
|
|
doc_delay(docg3, 2);
|
|
ret = doc_wait_ready(docg3);
|
|
if (ret)
|
|
goto out;
|
|
|
|
doc_flash_command(docg3, DOC_CMD_PROG_CYCLE1);
|
|
sector = (block1 << DOC_ADDR_BLOCK_SHIFT) + (page & DOC_ADDR_PAGE_MASK);
|
|
doc_setup_writeaddr_sector(docg3, sector, ofs);
|
|
doc_delay(docg3, 1);
|
|
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static int doc_write_page_ecc_init(struct docg3 *docg3, int len)
|
|
{
|
|
doc_writew(docg3, DOC_ECCCONF0_WRITE_MODE
|
|
| DOC_ECCCONF0_BCH_ENABLE | DOC_ECCCONF0_HAMMING_ENABLE
|
|
| (len & DOC_ECCCONF0_DATA_BYTES_MASK),
|
|
DOC_ECCCONF0);
|
|
doc_delay(docg3, 4);
|
|
doc_register_readb(docg3, DOC_FLASHCONTROL);
|
|
return doc_wait_ready(docg3);
|
|
}
|
|
|
|
static void doc_write_page_putbytes(struct docg3 *docg3, int len,
|
|
const u_char *buf)
|
|
{
|
|
doc_write_data_area(docg3, buf, len);
|
|
doc_delay(docg3, 2);
|
|
}
|
|
|
|
static void doc_ecc_disable(struct docg3 *docg3)
|
|
{
|
|
doc_writew(docg3, DOC_ECCCONF0_READ_MODE, DOC_ECCCONF0);
|
|
doc_delay(docg3, 4);
|
|
}
|
|
|
|
static int doc_get_op_status(struct docg3 *docg3)
|
|
{
|
|
u8 status;
|
|
|
|
doc_flash_sequence(docg3, DOC_SEQ_PLANES_STATUS);
|
|
doc_flash_command(docg3, DOC_CMD_PLANES_STATUS);
|
|
doc_delay(docg3, 5);
|
|
|
|
doc_ecc_disable(docg3);
|
|
doc_read_data_area(docg3, &status, 1, 1);
|
|
return status;
|
|
}
|
|
|
|
static int doc_write_erase_wait_status(struct docg3 *docg3)
|
|
{
|
|
int status, ret = 0;
|
|
uint64_t start = get_time_ns();
|
|
|
|
while (!is_timeout(start, 3000 * MSECOND) && !doc_is_ready(docg3));
|
|
if (!doc_is_ready(docg3)) {
|
|
doc_dbg("Timeout reached and the chip is still not ready\n");
|
|
ret = -EAGAIN;
|
|
goto out;
|
|
}
|
|
|
|
status = doc_get_op_status(docg3);
|
|
if (status & DOC_PLANES_STATUS_FAIL) {
|
|
doc_dbg("Erase/Write failed on (a) plane(s), status = %x\n",
|
|
status);
|
|
ret = -EIO;
|
|
}
|
|
|
|
out:
|
|
doc_page_finish(docg3);
|
|
return ret;
|
|
}
|
|
|
|
static int doc_erase_block(struct docg3 *docg3, int block0, int block1)
|
|
{
|
|
int ret, sector;
|
|
|
|
doc_dbg("doc_erase_block(blocks=(%d,%d))\n", block0, block1);
|
|
ret = doc_reset_seq(docg3);
|
|
if (ret)
|
|
return -EIO;
|
|
|
|
doc_set_reliable_mode(docg3);
|
|
doc_flash_sequence(docg3, DOC_SEQ_ERASE);
|
|
|
|
sector = block0 << DOC_ADDR_BLOCK_SHIFT;
|
|
doc_flash_command(docg3, DOC_CMD_PROG_BLOCK_ADDR);
|
|
doc_setup_addr_sector(docg3, sector);
|
|
sector = block1 << DOC_ADDR_BLOCK_SHIFT;
|
|
doc_flash_command(docg3, DOC_CMD_PROG_BLOCK_ADDR);
|
|
doc_setup_addr_sector(docg3, sector);
|
|
doc_delay(docg3, 1);
|
|
|
|
doc_flash_command(docg3, DOC_CMD_ERASECYCLE2);
|
|
doc_delay(docg3, 2);
|
|
|
|
if (is_prot_seq_error(docg3)) {
|
|
doc_err("Erase blocks %d,%d error\n", block0, block1);
|
|
return -EIO;
|
|
}
|
|
|
|
return doc_write_erase_wait_status(docg3);
|
|
}
|
|
|
|
static int doc_erase(struct mtd_info *mtd, struct erase_info *info)
|
|
{
|
|
struct docg3 *docg3 = mtd->priv;
|
|
uint64_t len;
|
|
int block0, block1, page, ret, ofs = 0;
|
|
|
|
doc_dbg("doc_erase(from=%d, len=%d\n", info->addr, info->len);
|
|
doc_set_device_id(docg3, docg3->device_id);
|
|
|
|
info->state = MTD_ERASE_PENDING;
|
|
calc_block_sector(info->addr + info->len, &block0, &block1, &page,
|
|
&ofs, docg3->reliable);
|
|
ret = -EINVAL;
|
|
if (block1 > docg3->max_block || page || ofs)
|
|
goto reset_err;
|
|
|
|
ret = 0;
|
|
calc_block_sector(info->addr, &block0, &block1, &page, &ofs,
|
|
docg3->reliable);
|
|
doc_set_reliable_mode(docg3);
|
|
for (len = info->len; !ret && len > 0; len -= mtd->erasesize) {
|
|
info->state = MTD_ERASING;
|
|
ret = doc_erase_block(docg3, block0, block1);
|
|
block0 += 2;
|
|
block1 += 2;
|
|
}
|
|
|
|
if (ret)
|
|
goto reset_err;
|
|
|
|
info->state = MTD_ERASE_DONE;
|
|
return 0;
|
|
|
|
reset_err:
|
|
info->state = MTD_ERASE_FAILED;
|
|
return ret;
|
|
}
|
|
|
|
static int doc_write_page(struct docg3 *docg3, loff_t to, const u_char *buf,
|
|
const u_char *oob, int autoecc)
|
|
{
|
|
int block0, block1, page, ret, ofs = 0;
|
|
u8 hwecc[DOC_ECC_BCH_SIZE], hamming;
|
|
|
|
doc_dbg("doc_write_page(to=%lld)\n", to);
|
|
calc_block_sector(to, &block0, &block1, &page, &ofs, docg3->reliable);
|
|
|
|
doc_set_device_id(docg3, docg3->device_id);
|
|
ret = doc_reset_seq(docg3);
|
|
if (ret)
|
|
goto err;
|
|
|
|
/* Program the flash address block and page */
|
|
ret = doc_write_seek(docg3, block0, block1, page, ofs);
|
|
if (ret)
|
|
goto err;
|
|
|
|
doc_write_page_ecc_init(docg3, DOC_ECC_BCH_TOTAL_BYTES);
|
|
doc_delay(docg3, 2);
|
|
doc_write_page_putbytes(docg3, DOC_LAYOUT_PAGE_SIZE, buf);
|
|
|
|
if (oob && autoecc) {
|
|
doc_write_page_putbytes(docg3, DOC_LAYOUT_OOB_PAGEINFO_SZ, oob);
|
|
doc_delay(docg3, 2);
|
|
oob += DOC_LAYOUT_OOB_UNUSED_OFS;
|
|
|
|
hamming = doc_register_readb(docg3, DOC_HAMMINGPARITY);
|
|
doc_delay(docg3, 2);
|
|
doc_write_page_putbytes(docg3, DOC_LAYOUT_OOB_HAMMING_SZ,
|
|
&hamming);
|
|
doc_delay(docg3, 2);
|
|
|
|
doc_get_bch_hw_ecc(docg3, hwecc);
|
|
doc_write_page_putbytes(docg3, DOC_LAYOUT_OOB_BCH_SZ, hwecc);
|
|
doc_delay(docg3, 2);
|
|
|
|
doc_write_page_putbytes(docg3, DOC_LAYOUT_OOB_UNUSED_SZ, oob);
|
|
}
|
|
if (oob && !autoecc)
|
|
doc_write_page_putbytes(docg3, DOC_LAYOUT_OOB_SIZE, oob);
|
|
|
|
doc_delay(docg3, 2);
|
|
doc_page_finish(docg3);
|
|
doc_delay(docg3, 2);
|
|
doc_flash_command(docg3, DOC_CMD_PROG_CYCLE2);
|
|
doc_delay(docg3, 2);
|
|
|
|
/*
|
|
* The wait status will perform another doc_page_finish() call, but that
|
|
* seems to please the docg3, so leave it.
|
|
*/
|
|
ret = doc_write_erase_wait_status(docg3);
|
|
return ret;
|
|
err:
|
|
doc_read_page_finish(docg3);
|
|
return ret;
|
|
}
|
|
|
|
static int doc_write_oob(struct mtd_info *mtd, loff_t ofs,
|
|
struct mtd_oob_ops *ops)
|
|
{
|
|
struct docg3 *docg3 = mtd->priv;
|
|
int block0, block1, page, ret, pofs = 0, autoecc, oobdelta;
|
|
u8 *oobbuf = ops->oobbuf;
|
|
u8 *buf = ops->datbuf;
|
|
size_t len, ooblen;
|
|
u8 oob[DOC_LAYOUT_OOB_SIZE] __aligned(4);
|
|
|
|
if (buf)
|
|
len = ops->len;
|
|
else
|
|
len = 0;
|
|
if (oobbuf)
|
|
ooblen = ops->ooblen;
|
|
else
|
|
ooblen = 0;
|
|
|
|
if (oobbuf && ops->mode == MTD_OOB_PLACE)
|
|
oobbuf += ops->ooboffs;
|
|
|
|
doc_dbg("doc_write_oob(from=%lld, mode=%d, data=(%p:%zu), oob=(%p:%zu))\n",
|
|
ofs, ops->mode, buf, len, oobbuf, ooblen);
|
|
switch (ops->mode) {
|
|
case MTD_OOB_PLACE:
|
|
case MTD_OOB_RAW:
|
|
oobdelta = mtd->oobsize;
|
|
break;
|
|
case MTD_OOB_AUTO:
|
|
oobdelta = mtd->ecclayout->oobavail;
|
|
break;
|
|
default:
|
|
oobdelta = 0;
|
|
}
|
|
if ((len % DOC_LAYOUT_PAGE_SIZE) || (ooblen % oobdelta) ||
|
|
(ofs % DOC_LAYOUT_PAGE_SIZE))
|
|
return -EINVAL;
|
|
if (len && ooblen &&
|
|
(len / DOC_LAYOUT_PAGE_SIZE) != (ooblen / oobdelta))
|
|
return -EINVAL;
|
|
|
|
ret = -EINVAL;
|
|
calc_block_sector(ofs + len, &block0, &block1, &page, &pofs,
|
|
docg3->reliable);
|
|
if (block1 > docg3->max_block)
|
|
goto err;
|
|
|
|
ops->oobretlen = 0;
|
|
ops->retlen = 0;
|
|
ret = 0;
|
|
if (len == 0 && ooblen == 0)
|
|
return -EINVAL;
|
|
if (len == 0 && ooblen > 0)
|
|
return doc_backup_oob(docg3, ofs, ops);
|
|
|
|
autoecc = doc_guess_autoecc(ops);
|
|
if (autoecc < 0)
|
|
return autoecc;
|
|
|
|
while (!ret && len > 0) {
|
|
memset(oob, 0, sizeof(oob));
|
|
if (ofs == docg3->oob_write_ofs)
|
|
memcpy(oob, docg3->oob_write_buf, DOC_LAYOUT_OOB_SIZE);
|
|
else if (ooblen > 0 && ops->mode == MTD_OOB_AUTO)
|
|
doc_fill_autooob(oob, oobbuf);
|
|
else if (ooblen > 0)
|
|
memcpy(oob, oobbuf, DOC_LAYOUT_OOB_SIZE);
|
|
ret = doc_write_page(docg3, ofs, buf, oob, autoecc);
|
|
|
|
ofs += DOC_LAYOUT_PAGE_SIZE;
|
|
len -= DOC_LAYOUT_PAGE_SIZE;
|
|
buf += DOC_LAYOUT_PAGE_SIZE;
|
|
if (ooblen) {
|
|
oobbuf += oobdelta;
|
|
ooblen -= oobdelta;
|
|
ops->oobretlen += oobdelta;
|
|
}
|
|
ops->retlen += DOC_LAYOUT_PAGE_SIZE;
|
|
}
|
|
err:
|
|
doc_set_device_id(docg3, 0);
|
|
return ret;
|
|
}
|
|
|
|
static int doc_write(struct mtd_info *mtd, loff_t to, size_t len,
|
|
size_t *retlen, const u_char *buf)
|
|
{
|
|
struct docg3 *docg3 = mtd->priv;
|
|
int ret;
|
|
struct mtd_oob_ops ops;
|
|
|
|
doc_dbg("doc_write(to=%lld, len=%zu)\n", to, len);
|
|
ops.datbuf = (char *)buf;
|
|
ops.len = len;
|
|
ops.mode = MTD_OOB_PLACE;
|
|
ops.oobbuf = NULL;
|
|
ops.ooblen = 0;
|
|
ops.ooboffs = 0;
|
|
|
|
ret = doc_write_oob(mtd, to, &ops);
|
|
*retlen = ops.retlen;
|
|
return ret;
|
|
}
|
|
#endif
|
|
|
|
static void __init doc_set_driver_info(int chip_id, struct mtd_info *mtd)
|
|
{
|
|
struct docg3 *docg3 = mtd->priv;
|
|
int cfg;
|
|
|
|
cfg = doc_register_readb(docg3, DOC_CONFIGURATION);
|
|
docg3->if_cfg = (cfg & DOC_CONF_IF_CFG ? 1 : 0);
|
|
docg3->reliable = reliable_mode;
|
|
|
|
switch (chip_id) {
|
|
case DOC_CHIPID_G3:
|
|
mtd->name = asprintf("DiskOnChip G3 floor %d",
|
|
docg3->device_id);
|
|
docg3->max_block = 2047;
|
|
break;
|
|
}
|
|
mtd->type = MTD_NANDFLASH;
|
|
mtd->flags = MTD_CAP_NANDFLASH;
|
|
mtd->size = (docg3->max_block + 1) * DOC_LAYOUT_BLOCK_SIZE;
|
|
if (docg3->reliable == 2)
|
|
mtd->size /= 2;
|
|
mtd->erasesize = DOC_LAYOUT_BLOCK_SIZE * DOC_LAYOUT_NBPLANES;
|
|
if (docg3->reliable == 2)
|
|
mtd->erasesize /= 2;
|
|
mtd->writesize = DOC_LAYOUT_PAGE_SIZE;
|
|
mtd->oobsize = DOC_LAYOUT_OOB_SIZE;
|
|
mtd->read = doc_read;
|
|
mtd->read_oob = doc_read_oob;
|
|
mtd->block_isbad = doc_block_isbad;
|
|
#ifdef CONFIG_MTD_WRITE
|
|
mtd->erase = doc_erase;
|
|
mtd->write = doc_write;
|
|
mtd->write_oob = doc_write_oob;
|
|
#endif
|
|
}
|
|
|
|
static struct mtd_info *doc_probe_device(void __iomem *base, int floor,
|
|
struct device_d *dev)
|
|
{
|
|
int ret, bbt_nbpages;
|
|
u16 chip_id, chip_id_inv;
|
|
struct docg3 *docg3;
|
|
struct mtd_info *mtd;
|
|
|
|
ret = -ENOMEM;
|
|
docg3 = kzalloc(sizeof(struct docg3), GFP_KERNEL);
|
|
if (!docg3)
|
|
goto nomem1;
|
|
mtd = kzalloc(sizeof(struct mtd_info), GFP_KERNEL);
|
|
if (!mtd)
|
|
goto nomem2;
|
|
mtd->priv = docg3;
|
|
bbt_nbpages = DIV_ROUND_UP(docg3->max_block + 1,
|
|
8 * DOC_LAYOUT_PAGE_SIZE);
|
|
docg3->bbt = kzalloc(bbt_nbpages * DOC_LAYOUT_PAGE_SIZE, GFP_KERNEL);
|
|
if (!docg3->bbt)
|
|
goto nomem3;
|
|
|
|
docg3->dev = dev;
|
|
docg3->device_id = floor;
|
|
docg3->base = base;
|
|
doc_set_device_id(docg3, docg3->device_id);
|
|
if (!floor)
|
|
doc_set_asic_mode(docg3, DOC_ASICMODE_RESET);
|
|
doc_set_asic_mode(docg3, DOC_ASICMODE_NORMAL);
|
|
|
|
chip_id = doc_register_readw(docg3, DOC_CHIPID);
|
|
chip_id_inv = doc_register_readw(docg3, DOC_CHIPID_INV);
|
|
|
|
ret = 0;
|
|
if (chip_id != (u16)(~chip_id_inv))
|
|
goto nomem3;
|
|
|
|
switch (chip_id) {
|
|
case DOC_CHIPID_G3:
|
|
doc_info("Found a G3 DiskOnChip at addr %p, floor %d\n",
|
|
base, floor);
|
|
break;
|
|
default:
|
|
doc_err("Chip id %04x is not a DiskOnChip G3 chip\n", chip_id);
|
|
goto nomem3;
|
|
}
|
|
|
|
doc_set_driver_info(chip_id, mtd);
|
|
|
|
doc_hamming_ecc_init(docg3, DOC_LAYOUT_OOB_PAGEINFO_SZ);
|
|
doc_reload_bbt(docg3);
|
|
return mtd;
|
|
|
|
nomem3:
|
|
kfree(mtd);
|
|
nomem2:
|
|
kfree(docg3);
|
|
nomem1:
|
|
return ERR_PTR(ret);
|
|
}
|
|
|
|
static int __init docg3_probe(struct device_d *dev)
|
|
{
|
|
struct mtd_info *mtd;
|
|
void __iomem *base;
|
|
int ret, floor, found = 0;
|
|
|
|
base = dev_request_mem_region(dev, 0);
|
|
|
|
ret = -ENOMEM;
|
|
docg3_bch = init_bch(DOC_ECC_BCH_M, DOC_ECC_BCH_T,
|
|
DOC_ECC_BCH_PRIMPOLY);
|
|
if (!docg3_bch)
|
|
goto nomem2;
|
|
|
|
/* for (floor = 0; floor < DOC_MAX_NBFLOORS; floor++) { */
|
|
for (floor = 0; floor < 2; floor++) {
|
|
mtd = doc_probe_device(base, floor, dev);
|
|
if (IS_ERR(mtd)) {
|
|
ret = PTR_ERR(mtd);
|
|
goto err_probe;
|
|
}
|
|
if (!mtd) {
|
|
if (floor == 0)
|
|
goto notfound;
|
|
else
|
|
continue;
|
|
}
|
|
docg3_floors[floor] = mtd;
|
|
mtd->parent = dev;
|
|
ret = add_mtd_device(mtd, NULL);
|
|
if (ret)
|
|
goto err_probe;
|
|
found++;
|
|
}
|
|
|
|
if (ret)
|
|
goto err_probe;
|
|
if (!found)
|
|
goto notfound;
|
|
|
|
return 0;
|
|
|
|
notfound:
|
|
ret = -ENODEV;
|
|
dev_info(dev, "No supported DiskOnChip found\n");
|
|
err_probe:
|
|
free_bch(docg3_bch);
|
|
nomem2:
|
|
return ret;
|
|
}
|
|
|
|
static struct driver_d g3_driver = {
|
|
.name = "docg3",
|
|
.probe = docg3_probe,
|
|
};
|
|
device_platform_driver(g3_driver);
|