[PATCH 23/30] mtd: remove dead disk-on-chip support
Sascha Hauer
s.hauer at pengutronix.de
Thu Jul 5 15:36:53 EDT 2012
Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>
---
drivers/mtd/nand/Kconfig | 32 -
drivers/mtd/nand/Makefile | 1 -
drivers/mtd/nand/diskonchip.c | 1787 -----------------------------------------
3 files changed, 1820 deletions(-)
delete mode 100644 drivers/mtd/nand/diskonchip.c
diff --git a/drivers/mtd/nand/Kconfig b/drivers/mtd/nand/Kconfig
index 3f90643..6889b44 100644
--- a/drivers/mtd/nand/Kconfig
+++ b/drivers/mtd/nand/Kconfig
@@ -105,38 +105,6 @@ config MTD_NAND_MUSEUM_IDS
config MTD_NAND_IDS
tristate
-config MTD_NAND_DISKONCHIP
- tristate "DiskOnChip 2000, Millennium and Millennium Plus"
- depends on EXPERIMENTAL && BROKEN
- help
- This is a reimplementation of M-Systems DiskOnChip 2000,
- Millennium and Millennium Plus as a standard NAND device driver,
- as opposed to the earlier self-contained MTD device drivers.
- This should enable, among other things, proper JFFS2 operation on
- these devices.
-
-config MTD_NAND_DISKONCHIP_BBTWRITE
- bool "Allow BBT writes on DiskOnChip Millennium and 2000TSOP"
- depends on MTD_NAND_DISKONCHIP
- help
- On DiskOnChip devices shipped with the INFTL filesystem (Millennium
- and 2000 TSOP/Alon), Linux reserves some space at the end of the
- device for the Bad Block Table (BBT). If you have existing INFTL
- data on your device (created by non-Linux tools such as M-Systems'
- DOS drivers), your data might overlap the area Linux wants to use for
- the BBT. If this is a concern for you, leave this option disabled and
- Linux will not write BBT data into this area.
- The downside of leaving this option disabled is that if bad blocks
- are detected by Linux, they will not be recorded in the BBT, which
- could cause future problems.
- Once you enable this option, new filesystems (INFTL or others, created
- in Linux or other operating systems) will not use the reserved area.
- The only reason not to enable this option is to prevent damage to
- preexisting filesystems.
- Even if you leave this disabled, you can enable BBT writes at module
- load time (assuming you build diskonchip as a module) with the module
- parameter "inftl_bbt_write=1".
-
config MTD_NAND_NOMADIK
tristate "ST Nomadik 8815 NAND support"
depends on ARCH_NOMADIK
diff --git a/drivers/mtd/nand/Makefile b/drivers/mtd/nand/Makefile
index 4179618..9d46bc0 100644
--- a/drivers/mtd/nand/Makefile
+++ b/drivers/mtd/nand/Makefile
@@ -9,7 +9,6 @@ obj-$(CONFIG_MTD_NAND_IDS) += nand_ids.o
obj-$(CONFIG_NAND) += nand_base.o nand-bb.o
obj-$(CONFIG_NAND_BBT) += nand_bbt.o
-obj-$(CONFIG_MTD_NAND_DISKONCHIP) += diskonchip.o
obj-$(CONFIG_MTD_NAND_NOMADIK) += nomadik_nand.o
obj-$(CONFIG_NAND_IMX) += nand_imx.o
obj-$(CONFIG_NAND_OMAP_GPMC) += nand_omap_gpmc.o nand_omap_bch_decoder.o
diff --git a/drivers/mtd/nand/diskonchip.c b/drivers/mtd/nand/diskonchip.c
deleted file mode 100644
index 6da68dc..0000000
--- a/drivers/mtd/nand/diskonchip.c
+++ /dev/null
@@ -1,1787 +0,0 @@
-/*
- * drivers/mtd/nand/diskonchip.c
- *
- * (C) 2003 Red Hat, Inc.
- * (C) 2004 Dan Brown <dan_brown at ieee.org>
- * (C) 2004 Kalev Lember <kalev at smartlink.ee>
- *
- * Author: David Woodhouse <dwmw2 at infradead.org>
- * Additional Diskonchip 2000 and Millennium support by Dan Brown <dan_brown at ieee.org>
- * Diskonchip Millennium Plus support by Kalev Lember <kalev at smartlink.ee>
- *
- * Error correction code lifted from the old docecc code
- * Author: Fabrice Bellard (fabrice.bellard at netgem.com)
- * Copyright (C) 2000 Netgem S.A.
- * converted to the generic Reed-Solomon library by Thomas Gleixner <tglx at linutronix.de>
- *
- * Interface to generic NAND code for M-Systems DiskOnChip devices
- *
- * $Id: diskonchip.c,v 1.45 2005/01/05 18:05:14 dwmw2 Exp $
- */
-
-#include <common.h>
-
-#if !defined(CFG_NAND_LEGACY)
-
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/sched.h>
-#include <linux/delay.h>
-#include <linux/rslib.h>
-#include <linux/moduleparam.h>
-#include <io.h>
-
-#include <linux/mtd/mtd.h>
-#include <linux/mtd/nand.h>
-#include <linux/mtd/doc2000.h>
-#include <linux/mtd/compatmac.h>
-#include <linux/mtd/partitions.h>
-#include <linux/mtd/inftl.h>
-
-/* Where to look for the devices? */
-#ifndef CONFIG_MTD_DISKONCHIP_PROBE_ADDRESS
-#define CONFIG_MTD_DISKONCHIP_PROBE_ADDRESS 0
-#endif
-
-static unsigned long __initdata doc_locations[] = {
-#if defined (__alpha__) || defined(__i386__) || defined(__x86_64__)
-#ifdef CONFIG_MTD_DISKONCHIP_PROBE_HIGH
- 0xfffc8000, 0xfffca000, 0xfffcc000, 0xfffce000,
- 0xfffd0000, 0xfffd2000, 0xfffd4000, 0xfffd6000,
- 0xfffd8000, 0xfffda000, 0xfffdc000, 0xfffde000,
- 0xfffe0000, 0xfffe2000, 0xfffe4000, 0xfffe6000,
- 0xfffe8000, 0xfffea000, 0xfffec000, 0xfffee000,
-#else /* CONFIG_MTD_DOCPROBE_HIGH */
- 0xc8000, 0xca000, 0xcc000, 0xce000,
- 0xd0000, 0xd2000, 0xd4000, 0xd6000,
- 0xd8000, 0xda000, 0xdc000, 0xde000,
- 0xe0000, 0xe2000, 0xe4000, 0xe6000,
- 0xe8000, 0xea000, 0xec000, 0xee000,
-#endif /* CONFIG_MTD_DOCPROBE_HIGH */
-#elif defined(__PPC__)
- 0xe4000000,
-#elif defined(CONFIG_MOMENCO_OCELOT)
- 0x2f000000,
- 0xff000000,
-#elif defined(CONFIG_MOMENCO_OCELOT_G) || defined (CONFIG_MOMENCO_OCELOT_C)
- 0xff000000,
-##else
-#warning Unknown architecture for DiskOnChip. No default probe locations defined
-#endif
- 0xffffffff };
-
-static struct mtd_info *doclist = NULL;
-
-struct doc_priv {
- void __iomem *virtadr;
- unsigned long physadr;
- u_char ChipID;
- u_char CDSNControl;
- int chips_per_floor; /* The number of chips detected on each floor */
- int curfloor;
- int curchip;
- int mh0_page;
- int mh1_page;
- struct mtd_info *nextdoc;
-};
-
-/* Max number of eraseblocks to scan (from start of device) for the (I)NFTL
- MediaHeader. The spec says to just keep going, I think, but that's just
- silly. */
-#define MAX_MEDIAHEADER_SCAN 8
-
-/* This is the syndrome computed by the HW ecc generator upon reading an empty
- page, one with all 0xff for data and stored ecc code. */
-static u_char empty_read_syndrome[6] = { 0x26, 0xff, 0x6d, 0x47, 0x73, 0x7a };
-/* This is the ecc value computed by the HW ecc generator upon writing an empty
- page, one with all 0xff for data. */
-static u_char empty_write_ecc[6] = { 0x4b, 0x00, 0xe2, 0x0e, 0x93, 0xf7 };
-
-#define INFTL_BBT_RESERVED_BLOCKS 4
-
-#define DoC_is_MillenniumPlus(doc) ((doc)->ChipID == DOC_ChipID_DocMilPlus16 || (doc)->ChipID == DOC_ChipID_DocMilPlus32)
-#define DoC_is_Millennium(doc) ((doc)->ChipID == DOC_ChipID_DocMil)
-#define DoC_is_2000(doc) ((doc)->ChipID == DOC_ChipID_Doc2k)
-
-static void doc200x_hwcontrol(struct mtd_info *mtd, int cmd);
-static void doc200x_select_chip(struct mtd_info *mtd, int chip);
-
-static int debug=0;
-module_param(debug, int, 0);
-
-static int try_dword=1;
-module_param(try_dword, int, 0);
-
-static int no_ecc_failures=0;
-module_param(no_ecc_failures, int, 0);
-
-#ifdef CONFIG_MTD_PARTITIONS
-static int no_autopart=0;
-module_param(no_autopart, int, 0);
-#endif
-
-#ifdef CONFIG_MTD_NAND_DISKONCHIP_BBTWRITE
-static int inftl_bbt_write=1;
-#else
-static int inftl_bbt_write=0;
-#endif
-module_param(inftl_bbt_write, int, 0);
-
-static unsigned long doc_config_location = CONFIG_MTD_DISKONCHIP_PROBE_ADDRESS;
-module_param(doc_config_location, ulong, 0);
-MODULE_PARM_DESC(doc_config_location, "Physical memory address at which to probe for DiskOnChip");
-
-
-/* Sector size for HW ECC */
-#define SECTOR_SIZE 512
-/* The sector bytes are packed into NB_DATA 10 bit words */
-#define NB_DATA (((SECTOR_SIZE + 1) * 8 + 6) / 10)
-/* Number of roots */
-#define NROOTS 4
-/* First consective root */
-#define FCR 510
-/* Number of symbols */
-#define NN 1023
-
-/* the Reed Solomon control structure */
-static struct rs_control *rs_decoder;
-
-/*
- * The HW decoder in the DoC ASIC's provides us a error syndrome,
- * which we must convert to a standard syndrom usable by the generic
- * Reed-Solomon library code.
- *
- * Fabrice Bellard figured this out in the old docecc code. I added
- * some comments, improved a minor bit and converted it to make use
- * of the generic Reed-Solomon libary. tglx
- */
-static int doc_ecc_decode (struct rs_control *rs, uint8_t *data, uint8_t *ecc)
-{
- int i, j, nerr, errpos[8];
- uint8_t parity;
- uint16_t ds[4], s[5], tmp, errval[8], syn[4];
-
- /* Convert the ecc bytes into words */
- ds[0] = ((ecc[4] & 0xff) >> 0) | ((ecc[5] & 0x03) << 8);
- ds[1] = ((ecc[5] & 0xfc) >> 2) | ((ecc[2] & 0x0f) << 6);
- ds[2] = ((ecc[2] & 0xf0) >> 4) | ((ecc[3] & 0x3f) << 4);
- ds[3] = ((ecc[3] & 0xc0) >> 6) | ((ecc[0] & 0xff) << 2);
- parity = ecc[1];
-
- /* Initialize the syndrom buffer */
- for (i = 0; i < NROOTS; i++)
- s[i] = ds[0];
- /*
- * Evaluate
- * s[i] = ds[3]x^3 + ds[2]x^2 + ds[1]x^1 + ds[0]
- * where x = alpha^(FCR + i)
- */
- for(j = 1; j < NROOTS; j++) {
- if(ds[j] == 0)
- continue;
- tmp = rs->index_of[ds[j]];
- for(i = 0; i < NROOTS; i++)
- s[i] ^= rs->alpha_to[rs_modnn(rs, tmp + (FCR + i) * j)];
- }
-
- /* Calc s[i] = s[i] / alpha^(v + i) */
- for (i = 0; i < NROOTS; i++) {
- if (syn[i])
- syn[i] = rs_modnn(rs, rs->index_of[s[i]] + (NN - FCR - i));
- }
- /* Call the decoder library */
- nerr = decode_rs16(rs, NULL, NULL, 1019, syn, 0, errpos, 0, errval);
-
- /* Incorrectable errors ? */
- if (nerr < 0)
- return nerr;
-
- /*
- * Correct the errors. The bitpositions are a bit of magic,
- * but they are given by the design of the de/encoder circuit
- * in the DoC ASIC's.
- */
- for(i = 0;i < nerr; i++) {
- int index, bitpos, pos = 1015 - errpos[i];
- uint8_t val;
- if (pos >= NB_DATA && pos < 1019)
- continue;
- if (pos < NB_DATA) {
- /* extract bit position (MSB first) */
- pos = 10 * (NB_DATA - 1 - pos) - 6;
- /* now correct the following 10 bits. At most two bytes
- can be modified since pos is even */
- index = (pos >> 3) ^ 1;
- bitpos = pos & 7;
- if ((index >= 0 && index < SECTOR_SIZE) ||
- index == (SECTOR_SIZE + 1)) {
- val = (uint8_t) (errval[i] >> (2 + bitpos));
- parity ^= val;
- if (index < SECTOR_SIZE)
- data[index] ^= val;
- }
- index = ((pos >> 3) + 1) ^ 1;
- bitpos = (bitpos + 10) & 7;
- if (bitpos == 0)
- bitpos = 8;
- if ((index >= 0 && index < SECTOR_SIZE) ||
- index == (SECTOR_SIZE + 1)) {
- val = (uint8_t)(errval[i] << (8 - bitpos));
- parity ^= val;
- if (index < SECTOR_SIZE)
- data[index] ^= val;
- }
- }
- }
- /* If the parity is wrong, no rescue possible */
- return parity ? -1 : nerr;
-}
-
-static void DoC_Delay(struct doc_priv *doc, unsigned short cycles)
-{
- volatile char dummy;
- int i;
-
- for (i = 0; i < cycles; i++) {
- if (DoC_is_Millennium(doc))
- dummy = ReadDOC(doc->virtadr, NOP);
- else if (DoC_is_MillenniumPlus(doc))
- dummy = ReadDOC(doc->virtadr, Mplus_NOP);
- else
- dummy = ReadDOC(doc->virtadr, DOCStatus);
- }
-
-}
-
-#define CDSN_CTRL_FR_B_MASK (CDSN_CTRL_FR_B0 | CDSN_CTRL_FR_B1)
-
-/* DOC_WaitReady: Wait for RDY line to be asserted by the flash chip */
-static int _DoC_WaitReady(struct doc_priv *doc)
-{
- void __iomem *docptr = doc->virtadr;
- unsigned long timeo = jiffies + (HZ * 10);
-
- if(debug) printk("_DoC_WaitReady...\n");
- /* Out-of-line routine to wait for chip response */
- if (DoC_is_MillenniumPlus(doc)) {
- while ((ReadDOC(docptr, Mplus_FlashControl) & CDSN_CTRL_FR_B_MASK) != CDSN_CTRL_FR_B_MASK) {
- if (time_after(jiffies, timeo)) {
- printk("_DoC_WaitReady timed out.\n");
- return -EIO;
- }
- udelay(1);
- cond_resched();
- }
- } else {
- while (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) {
- if (time_after(jiffies, timeo)) {
- printk("_DoC_WaitReady timed out.\n");
- return -EIO;
- }
- udelay(1);
- cond_resched();
- }
- }
-
- return 0;
-}
-
-static inline int DoC_WaitReady(struct doc_priv *doc)
-{
- void __iomem *docptr = doc->virtadr;
- int ret = 0;
-
- if (DoC_is_MillenniumPlus(doc)) {
- DoC_Delay(doc, 4);
-
- if ((ReadDOC(docptr, Mplus_FlashControl) & CDSN_CTRL_FR_B_MASK) != CDSN_CTRL_FR_B_MASK)
- /* Call the out-of-line routine to wait */
- ret = _DoC_WaitReady(doc);
- } else {
- DoC_Delay(doc, 4);
-
- if (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B))
- /* Call the out-of-line routine to wait */
- ret = _DoC_WaitReady(doc);
- DoC_Delay(doc, 2);
- }
-
- if(debug) printk("DoC_WaitReady OK\n");
- return ret;
-}
-
-static void doc2000_write_byte(struct mtd_info *mtd, u_char datum)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- void __iomem *docptr = doc->virtadr;
-
- if(debug)printk("write_byte %02x\n", datum);
- WriteDOC(datum, docptr, CDSNSlowIO);
- WriteDOC(datum, docptr, 2k_CDSN_IO);
-}
-
-static u_char doc2000_read_byte(struct mtd_info *mtd)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- void __iomem *docptr = doc->virtadr;
- u_char ret;
-
- ReadDOC(docptr, CDSNSlowIO);
- DoC_Delay(doc, 2);
- ret = ReadDOC(docptr, 2k_CDSN_IO);
- if (debug) printk("read_byte returns %02x\n", ret);
- return ret;
-}
-
-static void doc2000_writebuf(struct mtd_info *mtd,
- const u_char *buf, int len)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- void __iomem *docptr = doc->virtadr;
- int i;
- if (debug)printk("writebuf of %d bytes: ", len);
- for (i=0; i < len; i++) {
- WriteDOC_(buf[i], docptr, DoC_2k_CDSN_IO + i);
- if (debug && i < 16)
- printk("%02x ", buf[i]);
- }
- if (debug) printk("\n");
-}
-
-static void doc2000_readbuf(struct mtd_info *mtd,
- u_char *buf, int len)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- void __iomem *docptr = doc->virtadr;
- int i;
-
- if (debug)printk("readbuf of %d bytes: ", len);
-
- for (i=0; i < len; i++) {
- buf[i] = ReadDOC(docptr, 2k_CDSN_IO + i);
- }
-}
-
-static void doc2000_readbuf_dword(struct mtd_info *mtd,
- u_char *buf, int len)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- void __iomem *docptr = doc->virtadr;
- int i;
-
- if (debug) printk("readbuf_dword of %d bytes: ", len);
-
- if (unlikely((((unsigned long)buf)|len) & 3)) {
- for (i=0; i < len; i++) {
- *(uint8_t *)(&buf[i]) = ReadDOC(docptr, 2k_CDSN_IO + i);
- }
- } else {
- for (i=0; i < len; i+=4) {
- *(uint32_t*)(&buf[i]) = readl(docptr + DoC_2k_CDSN_IO + i);
- }
- }
-}
-
-static int doc2000_verifybuf(struct mtd_info *mtd,
- const u_char *buf, int len)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- void __iomem *docptr = doc->virtadr;
- int i;
-
- for (i=0; i < len; i++)
- if (buf[i] != ReadDOC(docptr, 2k_CDSN_IO))
- return -EFAULT;
- return 0;
-}
-
-static uint16_t __init doc200x_ident_chip(struct mtd_info *mtd, int nr)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- uint16_t ret;
-
- doc200x_select_chip(mtd, nr);
- doc200x_hwcontrol(mtd, NAND_CTL_SETCLE);
- this->write_byte(mtd, NAND_CMD_READID);
- doc200x_hwcontrol(mtd, NAND_CTL_CLRCLE);
- doc200x_hwcontrol(mtd, NAND_CTL_SETALE);
- this->write_byte(mtd, 0);
- doc200x_hwcontrol(mtd, NAND_CTL_CLRALE);
-
- ret = this->read_byte(mtd) << 8;
- ret |= this->read_byte(mtd);
-
- if (doc->ChipID == DOC_ChipID_Doc2k && try_dword && !nr) {
- /* First chip probe. See if we get same results by 32-bit access */
- union {
- uint32_t dword;
- uint8_t byte[4];
- } ident;
- void __iomem *docptr = doc->virtadr;
-
- doc200x_hwcontrol(mtd, NAND_CTL_SETCLE);
- doc2000_write_byte(mtd, NAND_CMD_READID);
- doc200x_hwcontrol(mtd, NAND_CTL_CLRCLE);
- doc200x_hwcontrol(mtd, NAND_CTL_SETALE);
- doc2000_write_byte(mtd, 0);
- doc200x_hwcontrol(mtd, NAND_CTL_CLRALE);
-
- ident.dword = readl(docptr + DoC_2k_CDSN_IO);
- if (((ident.byte[0] << 8) | ident.byte[1]) == ret) {
- printk(KERN_INFO "DiskOnChip 2000 responds to DWORD access\n");
- this->read_buf = &doc2000_readbuf_dword;
- }
- }
-
- return ret;
-}
-
-static void __init doc2000_count_chips(struct mtd_info *mtd)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- uint16_t mfrid;
- int i;
-
- /* Max 4 chips per floor on DiskOnChip 2000 */
- doc->chips_per_floor = 4;
-
- /* Find out what the first chip is */
- mfrid = doc200x_ident_chip(mtd, 0);
-
- /* Find how many chips in each floor. */
- for (i = 1; i < 4; i++) {
- if (doc200x_ident_chip(mtd, i) != mfrid)
- break;
- }
- doc->chips_per_floor = i;
- printk(KERN_DEBUG "Detected %d chips per floor.\n", i);
-}
-
-static int doc200x_wait(struct mtd_info *mtd, struct nand_chip *this, int state)
-{
- struct doc_priv *doc = this->priv;
-
- int status;
-
- DoC_WaitReady(doc);
- this->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1);
- DoC_WaitReady(doc);
- status = (int)this->read_byte(mtd);
-
- return status;
-}
-
-static void doc2001_write_byte(struct mtd_info *mtd, u_char datum)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- void __iomem *docptr = doc->virtadr;
-
- WriteDOC(datum, docptr, CDSNSlowIO);
- WriteDOC(datum, docptr, Mil_CDSN_IO);
- WriteDOC(datum, docptr, WritePipeTerm);
-}
-
-static u_char doc2001_read_byte(struct mtd_info *mtd)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- void __iomem *docptr = doc->virtadr;
-
- /*ReadDOC(docptr, CDSNSlowIO); */
- /* 11.4.5 -- delay twice to allow extended length cycle */
- DoC_Delay(doc, 2);
- ReadDOC(docptr, ReadPipeInit);
- /*return ReadDOC(docptr, Mil_CDSN_IO); */
- return ReadDOC(docptr, LastDataRead);
-}
-
-static void doc2001_writebuf(struct mtd_info *mtd,
- const u_char *buf, int len)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- void __iomem *docptr = doc->virtadr;
- int i;
-
- for (i=0; i < len; i++)
- WriteDOC_(buf[i], docptr, DoC_Mil_CDSN_IO + i);
- /* Terminate write pipeline */
- WriteDOC(0x00, docptr, WritePipeTerm);
-}
-
-static void doc2001_readbuf(struct mtd_info *mtd,
- u_char *buf, int len)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- void __iomem *docptr = doc->virtadr;
- int i;
-
- /* Start read pipeline */
- ReadDOC(docptr, ReadPipeInit);
-
- for (i=0; i < len-1; i++)
- buf[i] = ReadDOC(docptr, Mil_CDSN_IO + (i & 0xff));
-
- /* Terminate read pipeline */
- buf[i] = ReadDOC(docptr, LastDataRead);
-}
-
-static int doc2001_verifybuf(struct mtd_info *mtd,
- const u_char *buf, int len)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- void __iomem *docptr = doc->virtadr;
- int i;
-
- /* Start read pipeline */
- ReadDOC(docptr, ReadPipeInit);
-
- for (i=0; i < len-1; i++)
- if (buf[i] != ReadDOC(docptr, Mil_CDSN_IO)) {
- ReadDOC(docptr, LastDataRead);
- return i;
- }
- if (buf[i] != ReadDOC(docptr, LastDataRead))
- return i;
- return 0;
-}
-
-static u_char doc2001plus_read_byte(struct mtd_info *mtd)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- void __iomem *docptr = doc->virtadr;
- u_char ret;
-
- ReadDOC(docptr, Mplus_ReadPipeInit);
- ReadDOC(docptr, Mplus_ReadPipeInit);
- ret = ReadDOC(docptr, Mplus_LastDataRead);
- if (debug) printk("read_byte returns %02x\n", ret);
- return ret;
-}
-
-static void doc2001plus_writebuf(struct mtd_info *mtd,
- const u_char *buf, int len)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- void __iomem *docptr = doc->virtadr;
- int i;
-
- if (debug)printk("writebuf of %d bytes: ", len);
- for (i=0; i < len; i++) {
- WriteDOC_(buf[i], docptr, DoC_Mil_CDSN_IO + i);
- if (debug && i < 16)
- printk("%02x ", buf[i]);
- }
- if (debug) printk("\n");
-}
-
-static void doc2001plus_readbuf(struct mtd_info *mtd,
- u_char *buf, int len)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- void __iomem *docptr = doc->virtadr;
- int i;
-
- if (debug)printk("readbuf of %d bytes: ", len);
-
- /* Start read pipeline */
- ReadDOC(docptr, Mplus_ReadPipeInit);
- ReadDOC(docptr, Mplus_ReadPipeInit);
-
- for (i=0; i < len-2; i++) {
- buf[i] = ReadDOC(docptr, Mil_CDSN_IO);
- if (debug && i < 16)
- printk("%02x ", buf[i]);
- }
-
- /* Terminate read pipeline */
- buf[len-2] = ReadDOC(docptr, Mplus_LastDataRead);
- if (debug && i < 16)
- printk("%02x ", buf[len-2]);
- buf[len-1] = ReadDOC(docptr, Mplus_LastDataRead);
- if (debug && i < 16)
- printk("%02x ", buf[len-1]);
- if (debug) printk("\n");
-}
-
-static int doc2001plus_verifybuf(struct mtd_info *mtd,
- const u_char *buf, int len)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- void __iomem *docptr = doc->virtadr;
- int i;
-
- if (debug)printk("verifybuf of %d bytes: ", len);
-
- /* Start read pipeline */
- ReadDOC(docptr, Mplus_ReadPipeInit);
- ReadDOC(docptr, Mplus_ReadPipeInit);
-
- for (i=0; i < len-2; i++)
- if (buf[i] != ReadDOC(docptr, Mil_CDSN_IO)) {
- ReadDOC(docptr, Mplus_LastDataRead);
- ReadDOC(docptr, Mplus_LastDataRead);
- return i;
- }
- if (buf[len-2] != ReadDOC(docptr, Mplus_LastDataRead))
- return len-2;
- if (buf[len-1] != ReadDOC(docptr, Mplus_LastDataRead))
- return len-1;
- return 0;
-}
-
-static void doc2001plus_select_chip(struct mtd_info *mtd, int chip)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- void __iomem *docptr = doc->virtadr;
- int floor = 0;
-
- if(debug)printk("select chip (%d)\n", chip);
-
- if (chip == -1) {
- /* Disable flash internally */
- WriteDOC(0, docptr, Mplus_FlashSelect);
- return;
- }
-
- floor = chip / doc->chips_per_floor;
- chip -= (floor * doc->chips_per_floor);
-
- /* Assert ChipEnable and deassert WriteProtect */
- WriteDOC((DOC_FLASH_CE), docptr, Mplus_FlashSelect);
- this->cmdfunc(mtd, NAND_CMD_RESET, -1, -1);
-
- doc->curchip = chip;
- doc->curfloor = floor;
-}
-
-static void doc200x_select_chip(struct mtd_info *mtd, int chip)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- void __iomem *docptr = doc->virtadr;
- int floor = 0;
-
- if(debug)printk("select chip (%d)\n", chip);
-
- if (chip == -1)
- return;
-
- floor = chip / doc->chips_per_floor;
- chip -= (floor * doc->chips_per_floor);
-
- /* 11.4.4 -- deassert CE before changing chip */
- doc200x_hwcontrol(mtd, NAND_CTL_CLRNCE);
-
- WriteDOC(floor, docptr, FloorSelect);
- WriteDOC(chip, docptr, CDSNDeviceSelect);
-
- doc200x_hwcontrol(mtd, NAND_CTL_SETNCE);
-
- doc->curchip = chip;
- doc->curfloor = floor;
-}
-
-static void doc200x_hwcontrol(struct mtd_info *mtd, int cmd)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- void __iomem *docptr = doc->virtadr;
-
- switch(cmd) {
- case NAND_CTL_SETNCE:
- doc->CDSNControl |= CDSN_CTRL_CE;
- break;
- case NAND_CTL_CLRNCE:
- doc->CDSNControl &= ~CDSN_CTRL_CE;
- break;
- case NAND_CTL_SETCLE:
- doc->CDSNControl |= CDSN_CTRL_CLE;
- break;
- case NAND_CTL_CLRCLE:
- doc->CDSNControl &= ~CDSN_CTRL_CLE;
- break;
- case NAND_CTL_SETALE:
- doc->CDSNControl |= CDSN_CTRL_ALE;
- break;
- case NAND_CTL_CLRALE:
- doc->CDSNControl &= ~CDSN_CTRL_ALE;
- break;
- case NAND_CTL_SETWP:
- doc->CDSNControl |= CDSN_CTRL_WP;
- break;
- case NAND_CTL_CLRWP:
- doc->CDSNControl &= ~CDSN_CTRL_WP;
- break;
- }
- if (debug)printk("hwcontrol(%d): %02x\n", cmd, doc->CDSNControl);
- WriteDOC(doc->CDSNControl, docptr, CDSNControl);
- /* 11.4.3 -- 4 NOPs after CSDNControl write */
- DoC_Delay(doc, 4);
-}
-
-static void doc2001plus_command (struct mtd_info *mtd, unsigned command, int column, int page_addr)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- void __iomem *docptr = doc->virtadr;
-
- /*
- * Must terminate write pipeline before sending any commands
- * to the device.
- */
- if (command == NAND_CMD_PAGEPROG) {
- WriteDOC(0x00, docptr, Mplus_WritePipeTerm);
- WriteDOC(0x00, docptr, Mplus_WritePipeTerm);
- }
-
- /*
- * Write out the command to the device.
- */
- if (command == NAND_CMD_SEQIN) {
- int readcmd;
-
- if (column >= mtd->oobblock) {
- /* OOB area */
- column -= mtd->oobblock;
- readcmd = NAND_CMD_READOOB;
- } else if (column < 256) {
- /* First 256 bytes --> READ0 */
- readcmd = NAND_CMD_READ0;
- } else {
- column -= 256;
- readcmd = NAND_CMD_READ1;
- }
- WriteDOC(readcmd, docptr, Mplus_FlashCmd);
- }
- WriteDOC(command, docptr, Mplus_FlashCmd);
- WriteDOC(0, docptr, Mplus_WritePipeTerm);
- WriteDOC(0, docptr, Mplus_WritePipeTerm);
-
- if (column != -1 || page_addr != -1) {
- /* Serially input address */
- if (column != -1) {
- /* Adjust columns for 16 bit buswidth */
- if (this->options & NAND_BUSWIDTH_16)
- column >>= 1;
- WriteDOC(column, docptr, Mplus_FlashAddress);
- }
- if (page_addr != -1) {
- WriteDOC((unsigned char) (page_addr & 0xff), docptr, Mplus_FlashAddress);
- WriteDOC((unsigned char) ((page_addr >> 8) & 0xff), docptr, Mplus_FlashAddress);
- /* One more address cycle for higher density devices */
- if (this->chipsize & 0x0c000000) {
- WriteDOC((unsigned char) ((page_addr >> 16) & 0x0f), docptr, Mplus_FlashAddress);
- printk("high density\n");
- }
- }
- WriteDOC(0, docptr, Mplus_WritePipeTerm);
- WriteDOC(0, docptr, Mplus_WritePipeTerm);
- /* deassert ALE */
- if (command == NAND_CMD_READ0 || command == NAND_CMD_READ1 || command == NAND_CMD_READOOB || command == NAND_CMD_READID)
- WriteDOC(0, docptr, Mplus_FlashControl);
- }
-
- /*
- * program and erase have their own busy handlers
- * status and sequential in needs no delay
- */
- switch (command) {
-
- case NAND_CMD_PAGEPROG:
- case NAND_CMD_ERASE1:
- case NAND_CMD_ERASE2:
- case NAND_CMD_SEQIN:
- case NAND_CMD_STATUS:
- return;
-
- case NAND_CMD_RESET:
- if (this->dev_ready)
- break;
- udelay(this->chip_delay);
- WriteDOC(NAND_CMD_STATUS, docptr, Mplus_FlashCmd);
- WriteDOC(0, docptr, Mplus_WritePipeTerm);
- WriteDOC(0, docptr, Mplus_WritePipeTerm);
- while ( !(this->read_byte(mtd) & 0x40));
- return;
-
- /* This applies to read commands */
- default:
- /*
- * If we don't have access to the busy pin, we apply the given
- * command delay
- */
- if (!this->dev_ready) {
- udelay (this->chip_delay);
- return;
- }
- }
-
- /* Apply this short delay always to ensure that we do wait tWB in
- * any case on any machine. */
- ndelay (100);
- /* wait until command is processed */
- while (!this->dev_ready(mtd));
-}
-
-static int doc200x_dev_ready(struct mtd_info *mtd)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- void __iomem *docptr = doc->virtadr;
-
- if (DoC_is_MillenniumPlus(doc)) {
- /* 11.4.2 -- must NOP four times before checking FR/B# */
- DoC_Delay(doc, 4);
- if ((ReadDOC(docptr, Mplus_FlashControl) & CDSN_CTRL_FR_B_MASK) != CDSN_CTRL_FR_B_MASK) {
- if(debug)
- printk("not ready\n");
- return 0;
- }
- if (debug)printk("was ready\n");
- return 1;
- } else {
- /* 11.4.2 -- must NOP four times before checking FR/B# */
- DoC_Delay(doc, 4);
- if (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) {
- if(debug)
- printk("not ready\n");
- return 0;
- }
- /* 11.4.2 -- Must NOP twice if it's ready */
- DoC_Delay(doc, 2);
- if (debug)printk("was ready\n");
- return 1;
- }
-}
-
-static int doc200x_block_bad(struct mtd_info *mtd, loff_t ofs, int getchip)
-{
- /* This is our last resort if we couldn't find or create a BBT. Just
- pretend all blocks are good. */
- return 0;
-}
-
-static void doc200x_enable_hwecc(struct mtd_info *mtd, int mode)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- void __iomem *docptr = doc->virtadr;
-
- /* Prime the ECC engine */
- switch(mode) {
- case NAND_ECC_READ:
- WriteDOC(DOC_ECC_RESET, docptr, ECCConf);
- WriteDOC(DOC_ECC_EN, docptr, ECCConf);
- break;
- case NAND_ECC_WRITE:
- WriteDOC(DOC_ECC_RESET, docptr, ECCConf);
- WriteDOC(DOC_ECC_EN | DOC_ECC_RW, docptr, ECCConf);
- break;
- }
-}
-
-static void doc2001plus_enable_hwecc(struct mtd_info *mtd, int mode)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- void __iomem *docptr = doc->virtadr;
-
- /* Prime the ECC engine */
- switch(mode) {
- case NAND_ECC_READ:
- WriteDOC(DOC_ECC_RESET, docptr, Mplus_ECCConf);
- WriteDOC(DOC_ECC_EN, docptr, Mplus_ECCConf);
- break;
- case NAND_ECC_WRITE:
- WriteDOC(DOC_ECC_RESET, docptr, Mplus_ECCConf);
- WriteDOC(DOC_ECC_EN | DOC_ECC_RW, docptr, Mplus_ECCConf);
- break;
- }
-}
-
-/* This code is only called on write */
-static int doc200x_calculate_ecc(struct mtd_info *mtd, const u_char *dat,
- unsigned char *ecc_code)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- void __iomem *docptr = doc->virtadr;
- int i;
- int emptymatch = 1;
-
- /* flush the pipeline */
- if (DoC_is_2000(doc)) {
- WriteDOC(doc->CDSNControl & ~CDSN_CTRL_FLASH_IO, docptr, CDSNControl);
- WriteDOC(0, docptr, 2k_CDSN_IO);
- WriteDOC(0, docptr, 2k_CDSN_IO);
- WriteDOC(0, docptr, 2k_CDSN_IO);
- WriteDOC(doc->CDSNControl, docptr, CDSNControl);
- } else if (DoC_is_MillenniumPlus(doc)) {
- WriteDOC(0, docptr, Mplus_NOP);
- WriteDOC(0, docptr, Mplus_NOP);
- WriteDOC(0, docptr, Mplus_NOP);
- } else {
- WriteDOC(0, docptr, NOP);
- WriteDOC(0, docptr, NOP);
- WriteDOC(0, docptr, NOP);
- }
-
- for (i = 0; i < 6; i++) {
- if (DoC_is_MillenniumPlus(doc))
- ecc_code[i] = ReadDOC_(docptr, DoC_Mplus_ECCSyndrome0 + i);
- else
- ecc_code[i] = ReadDOC_(docptr, DoC_ECCSyndrome0 + i);
- if (ecc_code[i] != empty_write_ecc[i])
- emptymatch = 0;
- }
- if (DoC_is_MillenniumPlus(doc))
- WriteDOC(DOC_ECC_DIS, docptr, Mplus_ECCConf);
- else
- WriteDOC(DOC_ECC_DIS, docptr, ECCConf);
-#if 0
- /* If emptymatch=1, we might have an all-0xff data buffer. Check. */
- if (emptymatch) {
- /* Note: this somewhat expensive test should not be triggered
- often. It could be optimized away by examining the data in
- the writebuf routine, and remembering the result. */
- for (i = 0; i < 512; i++) {
- if (dat[i] == 0xff) continue;
- emptymatch = 0;
- break;
- }
- }
- /* If emptymatch still =1, we do have an all-0xff data buffer.
- Return all-0xff ecc value instead of the computed one, so
- it'll look just like a freshly-erased page. */
- if (emptymatch) memset(ecc_code, 0xff, 6);
-#endif
- return 0;
-}
-
-static int doc200x_correct_data(struct mtd_info *mtd, u_char *dat, u_char *read_ecc, u_char *calc_ecc)
-{
- int i, ret = 0;
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- void __iomem *docptr = doc->virtadr;
- volatile u_char dummy;
- int emptymatch = 1;
-
- /* flush the pipeline */
- if (DoC_is_2000(doc)) {
- dummy = ReadDOC(docptr, 2k_ECCStatus);
- dummy = ReadDOC(docptr, 2k_ECCStatus);
- dummy = ReadDOC(docptr, 2k_ECCStatus);
- } else if (DoC_is_MillenniumPlus(doc)) {
- dummy = ReadDOC(docptr, Mplus_ECCConf);
- dummy = ReadDOC(docptr, Mplus_ECCConf);
- dummy = ReadDOC(docptr, Mplus_ECCConf);
- } else {
- dummy = ReadDOC(docptr, ECCConf);
- dummy = ReadDOC(docptr, ECCConf);
- dummy = ReadDOC(docptr, ECCConf);
- }
-
- /* Error occured ? */
- if (dummy & 0x80) {
- for (i = 0; i < 6; i++) {
- if (DoC_is_MillenniumPlus(doc))
- calc_ecc[i] = ReadDOC_(docptr, DoC_Mplus_ECCSyndrome0 + i);
- else
- calc_ecc[i] = ReadDOC_(docptr, DoC_ECCSyndrome0 + i);
- if (calc_ecc[i] != empty_read_syndrome[i])
- emptymatch = 0;
- }
- /* If emptymatch=1, the read syndrome is consistent with an
- all-0xff data and stored ecc block. Check the stored ecc. */
- if (emptymatch) {
- for (i = 0; i < 6; i++) {
- if (read_ecc[i] == 0xff) continue;
- emptymatch = 0;
- break;
- }
- }
- /* If emptymatch still =1, check the data block. */
- if (emptymatch) {
- /* Note: this somewhat expensive test should not be triggered
- often. It could be optimized away by examining the data in
- the readbuf routine, and remembering the result. */
- for (i = 0; i < 512; i++) {
- if (dat[i] == 0xff) continue;
- emptymatch = 0;
- break;
- }
- }
- /* If emptymatch still =1, this is almost certainly a freshly-
- erased block, in which case the ECC will not come out right.
- We'll suppress the error and tell the caller everything's
- OK. Because it is. */
- if (!emptymatch) ret = doc_ecc_decode (rs_decoder, dat, calc_ecc);
- if (ret > 0)
- printk(KERN_ERR "doc200x_correct_data corrected %d errors\n", ret);
- }
- if (DoC_is_MillenniumPlus(doc))
- WriteDOC(DOC_ECC_DIS, docptr, Mplus_ECCConf);
- else
- WriteDOC(DOC_ECC_DIS, docptr, ECCConf);
- if (no_ecc_failures && (ret == -1)) {
- printk(KERN_ERR "suppressing ECC failure\n");
- ret = 0;
- }
- return ret;
-}
-
-/*u_char mydatabuf[528]; */
-
-static struct nand_oobinfo doc200x_oobinfo = {
- .useecc = MTD_NANDECC_AUTOPLACE,
- .eccbytes = 6,
- .eccpos = {0, 1, 2, 3, 4, 5},
- .oobfree = { {8, 8} }
-};
-
-/* Find the (I)NFTL Media Header, and optionally also the mirror media header.
- On sucessful return, buf will contain a copy of the media header for
- further processing. id is the string to scan for, and will presumably be
- either "ANAND" or "BNAND". If findmirror=1, also look for the mirror media
- header. The page #s of the found media headers are placed in mh0_page and
- mh1_page in the DOC private structure. */
-static int __init find_media_headers(struct mtd_info *mtd, u_char *buf,
- const char *id, int findmirror)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- unsigned offs, end = (MAX_MEDIAHEADER_SCAN << this->phys_erase_shift);
- int ret;
- size_t retlen;
-
- end = min(end, mtd->size); /* paranoia */
- for (offs = 0; offs < end; offs += mtd->erasesize) {
- ret = mtd->read(mtd, offs, mtd->oobblock, &retlen, buf);
- if (retlen != mtd->oobblock) continue;
- if (ret) {
- printk(KERN_WARNING "ECC error scanning DOC at 0x%x\n",
- offs);
- }
- if (memcmp(buf, id, 6)) continue;
- printk(KERN_INFO "Found DiskOnChip %s Media Header at 0x%x\n", id, offs);
- if (doc->mh0_page == -1) {
- doc->mh0_page = offs >> this->page_shift;
- if (!findmirror) return 1;
- continue;
- }
- doc->mh1_page = offs >> this->page_shift;
- return 2;
- }
- if (doc->mh0_page == -1) {
- printk(KERN_WARNING "DiskOnChip %s Media Header not found.\n", id);
- return 0;
- }
- /* Only one mediaheader was found. We want buf to contain a
- mediaheader on return, so we'll have to re-read the one we found. */
- offs = doc->mh0_page << this->page_shift;
- ret = mtd->read(mtd, offs, mtd->oobblock, &retlen, buf);
- if (retlen != mtd->oobblock) {
- /* Insanity. Give up. */
- printk(KERN_ERR "Read DiskOnChip Media Header once, but can't reread it???\n");
- return 0;
- }
- return 1;
-}
-
-static inline int __init nftl_partscan(struct mtd_info *mtd,
- struct mtd_partition *parts)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- int ret = 0;
- u_char *buf;
- struct NFTLMediaHeader *mh;
- const unsigned psize = 1 << this->page_shift;
- unsigned blocks, maxblocks;
- int offs, numheaders;
-
- buf = kmalloc(mtd->oobblock, GFP_KERNEL);
- if (!buf) {
- printk(KERN_ERR "DiskOnChip mediaheader kmalloc failed!\n");
- return 0;
- }
- if (!(numheaders=find_media_headers(mtd, buf, "ANAND", 1))) goto out;
- mh = (struct NFTLMediaHeader *) buf;
-
-/*#ifdef CONFIG_MTD_DEBUG_VERBOSE */
-/* if (CONFIG_MTD_DEBUG_VERBOSE >= 2) */
- printk(KERN_INFO " DataOrgID = %s\n"
- " NumEraseUnits = %d\n"
- " FirstPhysicalEUN = %d\n"
- " FormattedSize = %d\n"
- " UnitSizeFactor = %d\n",
- mh->DataOrgID, mh->NumEraseUnits,
- mh->FirstPhysicalEUN, mh->FormattedSize,
- mh->UnitSizeFactor);
-/*#endif */
-
- blocks = mtd->size >> this->phys_erase_shift;
- maxblocks = min(32768U, mtd->erasesize - psize);
-
- if (mh->UnitSizeFactor == 0x00) {
- /* Auto-determine UnitSizeFactor. The constraints are:
- - There can be at most 32768 virtual blocks.
- - There can be at most (virtual block size - page size)
- virtual blocks (because MediaHeader+BBT must fit in 1).
- */
- mh->UnitSizeFactor = 0xff;
- while (blocks > maxblocks) {
- blocks >>= 1;
- maxblocks = min(32768U, (maxblocks << 1) + psize);
- mh->UnitSizeFactor--;
- }
- printk(KERN_WARNING "UnitSizeFactor=0x00 detected. Correct value is assumed to be 0x%02x.\n", mh->UnitSizeFactor);
- }
-
- /* NOTE: The lines below modify internal variables of the NAND and MTD
- layers; variables with have already been configured by nand_scan.
- Unfortunately, we didn't know before this point what these values
- should be. Thus, this code is somewhat dependant on the exact
- implementation of the NAND layer. */
- if (mh->UnitSizeFactor != 0xff) {
- this->bbt_erase_shift += (0xff - mh->UnitSizeFactor);
- mtd->erasesize <<= (0xff - mh->UnitSizeFactor);
- printk(KERN_INFO "Setting virtual erase size to %d\n", mtd->erasesize);
- blocks = mtd->size >> this->bbt_erase_shift;
- maxblocks = min(32768U, mtd->erasesize - psize);
- }
-
- if (blocks > maxblocks) {
- printk(KERN_ERR "UnitSizeFactor of 0x%02x is inconsistent with device size. Aborting.\n", mh->UnitSizeFactor);
- goto out;
- }
-
- /* Skip past the media headers. */
- offs = max(doc->mh0_page, doc->mh1_page);
- offs <<= this->page_shift;
- offs += mtd->erasesize;
-
- /*parts[0].name = " DiskOnChip Boot / Media Header partition"; */
- /*parts[0].offset = 0; */
- /*parts[0].size = offs; */
-
- parts[0].name = " DiskOnChip BDTL partition";
- parts[0].offset = offs;
- parts[0].size = (mh->NumEraseUnits - numheaders) << this->bbt_erase_shift;
-
- offs += parts[0].size;
- if (offs < mtd->size) {
- parts[1].name = " DiskOnChip Remainder partition";
- parts[1].offset = offs;
- parts[1].size = mtd->size - offs;
- ret = 2;
- goto out;
- }
- ret = 1;
-out:
- kfree(buf);
- return ret;
-}
-
-/* This is a stripped-down copy of the code in inftlmount.c */
-static inline int __init inftl_partscan(struct mtd_info *mtd,
- struct mtd_partition *parts)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- int ret = 0;
- u_char *buf;
- struct INFTLMediaHeader *mh;
- struct INFTLPartition *ip;
- int numparts = 0;
- int blocks;
- int vshift, lastvunit = 0;
- int i;
- int end = mtd->size;
-
- if (inftl_bbt_write)
- end -= (INFTL_BBT_RESERVED_BLOCKS << this->phys_erase_shift);
-
- buf = kmalloc(mtd->oobblock, GFP_KERNEL);
- if (!buf) {
- printk(KERN_ERR "DiskOnChip mediaheader kmalloc failed!\n");
- return 0;
- }
-
- if (!find_media_headers(mtd, buf, "BNAND", 0)) goto out;
- doc->mh1_page = doc->mh0_page + (4096 >> this->page_shift);
- mh = (struct INFTLMediaHeader *) buf;
-
- mh->NoOfBootImageBlocks = le32_to_cpu(mh->NoOfBootImageBlocks);
- mh->NoOfBinaryPartitions = le32_to_cpu(mh->NoOfBinaryPartitions);
- mh->NoOfBDTLPartitions = le32_to_cpu(mh->NoOfBDTLPartitions);
- mh->BlockMultiplierBits = le32_to_cpu(mh->BlockMultiplierBits);
- mh->FormatFlags = le32_to_cpu(mh->FormatFlags);
- mh->PercentUsed = le32_to_cpu(mh->PercentUsed);
-
-/*#ifdef CONFIG_MTD_DEBUG_VERBOSE */
-/* if (CONFIG_MTD_DEBUG_VERBOSE >= 2) */
- printk(KERN_INFO " bootRecordID = %s\n"
- " NoOfBootImageBlocks = %d\n"
- " NoOfBinaryPartitions = %d\n"
- " NoOfBDTLPartitions = %d\n"
- " BlockMultiplerBits = %d\n"
- " FormatFlgs = %d\n"
- " OsakVersion = %d.%d.%d.%d\n"
- " PercentUsed = %d\n",
- mh->bootRecordID, mh->NoOfBootImageBlocks,
- mh->NoOfBinaryPartitions,
- mh->NoOfBDTLPartitions,
- mh->BlockMultiplierBits, mh->FormatFlags,
- ((unsigned char *) &mh->OsakVersion)[0] & 0xf,
- ((unsigned char *) &mh->OsakVersion)[1] & 0xf,
- ((unsigned char *) &mh->OsakVersion)[2] & 0xf,
- ((unsigned char *) &mh->OsakVersion)[3] & 0xf,
- mh->PercentUsed);
-/*#endif */
-
- vshift = this->phys_erase_shift + mh->BlockMultiplierBits;
-
- blocks = mtd->size >> vshift;
- if (blocks > 32768) {
- printk(KERN_ERR "BlockMultiplierBits=%d is inconsistent with device size. Aborting.\n", mh->BlockMultiplierBits);
- goto out;
- }
-
- blocks = doc->chips_per_floor << (this->chip_shift - this->phys_erase_shift);
- if (inftl_bbt_write && (blocks > mtd->erasesize)) {
- printk(KERN_ERR "Writeable BBTs spanning more than one erase block are not yet supported. FIX ME!\n");
- goto out;
- }
-
- /* Scan the partitions */
- for (i = 0; (i < 4); i++) {
- ip = &(mh->Partitions[i]);
- ip->virtualUnits = le32_to_cpu(ip->virtualUnits);
- ip->firstUnit = le32_to_cpu(ip->firstUnit);
- ip->lastUnit = le32_to_cpu(ip->lastUnit);
- ip->flags = le32_to_cpu(ip->flags);
- ip->spareUnits = le32_to_cpu(ip->spareUnits);
- ip->Reserved0 = le32_to_cpu(ip->Reserved0);
-
-/*#ifdef CONFIG_MTD_DEBUG_VERBOSE */
-/* if (CONFIG_MTD_DEBUG_VERBOSE >= 2) */
- printk(KERN_INFO " PARTITION[%d] ->\n"
- " virtualUnits = %d\n"
- " firstUnit = %d\n"
- " lastUnit = %d\n"
- " flags = 0x%x\n"
- " spareUnits = %d\n",
- i, ip->virtualUnits, ip->firstUnit,
- ip->lastUnit, ip->flags,
- ip->spareUnits);
-/*#endif */
-
-/*
- if ((i == 0) && (ip->firstUnit > 0)) {
- parts[0].name = " DiskOnChip IPL / Media Header partition";
- parts[0].offset = 0;
- parts[0].size = mtd->erasesize * ip->firstUnit;
- numparts = 1;
- }
-*/
-
- if (ip->flags & INFTL_BINARY)
- parts[numparts].name = " DiskOnChip BDK partition";
- else
- parts[numparts].name = " DiskOnChip BDTL partition";
- parts[numparts].offset = ip->firstUnit << vshift;
- parts[numparts].size = (1 + ip->lastUnit - ip->firstUnit) << vshift;
- numparts++;
- if (ip->lastUnit > lastvunit) lastvunit = ip->lastUnit;
- if (ip->flags & INFTL_LAST) break;
- }
- lastvunit++;
- if ((lastvunit << vshift) < end) {
- parts[numparts].name = " DiskOnChip Remainder partition";
- parts[numparts].offset = lastvunit << vshift;
- parts[numparts].size = end - parts[numparts].offset;
- numparts++;
- }
- ret = numparts;
-out:
- kfree(buf);
- return ret;
-}
-
-static int __init nftl_scan_bbt(struct mtd_info *mtd)
-{
- int ret, numparts;
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- struct mtd_partition parts[2];
-
- memset((char *) parts, 0, sizeof(parts));
- /* On NFTL, we have to find the media headers before we can read the
- BBTs, since they're stored in the media header eraseblocks. */
- numparts = nftl_partscan(mtd, parts);
- if (!numparts) return -EIO;
- this->bbt_td->options = NAND_BBT_ABSPAGE | NAND_BBT_8BIT |
- NAND_BBT_SAVECONTENT | NAND_BBT_WRITE |
- NAND_BBT_VERSION;
- this->bbt_td->veroffs = 7;
- this->bbt_td->pages[0] = doc->mh0_page + 1;
- if (doc->mh1_page != -1) {
- this->bbt_md->options = NAND_BBT_ABSPAGE | NAND_BBT_8BIT |
- NAND_BBT_SAVECONTENT | NAND_BBT_WRITE |
- NAND_BBT_VERSION;
- this->bbt_md->veroffs = 7;
- this->bbt_md->pages[0] = doc->mh1_page + 1;
- } else {
- this->bbt_md = NULL;
- }
-
- /* It's safe to set bd=NULL below because NAND_BBT_CREATE is not set.
- At least as nand_bbt.c is currently written. */
- if ((ret = nand_scan_bbt(mtd, NULL)))
- return ret;
- add_mtd_device(mtd, "nand");
-#ifdef CONFIG_MTD_PARTITIONS
- if (!no_autopart)
- add_mtd_partitions(mtd, parts, numparts);
-#endif
- return 0;
-}
-
-static int __init inftl_scan_bbt(struct mtd_info *mtd)
-{
- int ret, numparts;
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
- struct mtd_partition parts[5];
-
- if (this->numchips > doc->chips_per_floor) {
- printk(KERN_ERR "Multi-floor INFTL devices not yet supported.\n");
- return -EIO;
- }
-
- if (DoC_is_MillenniumPlus(doc)) {
- this->bbt_td->options = NAND_BBT_2BIT | NAND_BBT_ABSPAGE;
- if (inftl_bbt_write)
- this->bbt_td->options |= NAND_BBT_WRITE;
- this->bbt_td->pages[0] = 2;
- this->bbt_md = NULL;
- } else {
- this->bbt_td->options = NAND_BBT_LASTBLOCK | NAND_BBT_8BIT |
- NAND_BBT_VERSION;
- if (inftl_bbt_write)
- this->bbt_td->options |= NAND_BBT_WRITE;
- this->bbt_td->offs = 8;
- this->bbt_td->len = 8;
- this->bbt_td->veroffs = 7;
- this->bbt_td->maxblocks = INFTL_BBT_RESERVED_BLOCKS;
- this->bbt_td->reserved_block_code = 0x01;
- this->bbt_td->pattern = "MSYS_BBT";
-
- this->bbt_md->options = NAND_BBT_LASTBLOCK | NAND_BBT_8BIT |
- NAND_BBT_VERSION;
- if (inftl_bbt_write)
- this->bbt_md->options |= NAND_BBT_WRITE;
- this->bbt_md->offs = 8;
- this->bbt_md->len = 8;
- this->bbt_md->veroffs = 7;
- this->bbt_md->maxblocks = INFTL_BBT_RESERVED_BLOCKS;
- this->bbt_md->reserved_block_code = 0x01;
- this->bbt_md->pattern = "TBB_SYSM";
- }
-
- /* It's safe to set bd=NULL below because NAND_BBT_CREATE is not set.
- At least as nand_bbt.c is currently written. */
- if ((ret = nand_scan_bbt(mtd, NULL)))
- return ret;
- memset((char *) parts, 0, sizeof(parts));
- numparts = inftl_partscan(mtd, parts);
- /* At least for now, require the INFTL Media Header. We could probably
- do without it for non-INFTL use, since all it gives us is
- autopartitioning, but I want to give it more thought. */
- if (!numparts) return -EIO;
- add_mtd_device(mtd, "nand");
-#ifdef CONFIG_MTD_PARTITIONS
- if (!no_autopart)
- add_mtd_partitions(mtd, parts, numparts);
-#endif
- return 0;
-}
-
-static inline int __init doc2000_init(struct mtd_info *mtd)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
-
- this->write_byte = doc2000_write_byte;
- this->read_byte = doc2000_read_byte;
- this->write_buf = doc2000_writebuf;
- this->read_buf = doc2000_readbuf;
- this->verify_buf = doc2000_verifybuf;
- this->scan_bbt = nftl_scan_bbt;
-
- doc->CDSNControl = CDSN_CTRL_FLASH_IO | CDSN_CTRL_ECC_IO;
- doc2000_count_chips(mtd);
- mtd->name = "DiskOnChip 2000 (NFTL Model)";
- return (4 * doc->chips_per_floor);
-}
-
-static inline int __init doc2001_init(struct mtd_info *mtd)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
-
- this->write_byte = doc2001_write_byte;
- this->read_byte = doc2001_read_byte;
- this->write_buf = doc2001_writebuf;
- this->read_buf = doc2001_readbuf;
- this->verify_buf = doc2001_verifybuf;
-
- ReadDOC(doc->virtadr, ChipID);
- ReadDOC(doc->virtadr, ChipID);
- ReadDOC(doc->virtadr, ChipID);
- if (ReadDOC(doc->virtadr, ChipID) != DOC_ChipID_DocMil) {
- /* It's not a Millennium; it's one of the newer
- DiskOnChip 2000 units with a similar ASIC.
- Treat it like a Millennium, except that it
- can have multiple chips. */
- doc2000_count_chips(mtd);
- mtd->name = "DiskOnChip 2000 (INFTL Model)";
- this->scan_bbt = inftl_scan_bbt;
- return (4 * doc->chips_per_floor);
- } else {
- /* Bog-standard Millennium */
- doc->chips_per_floor = 1;
- mtd->name = "DiskOnChip Millennium";
- this->scan_bbt = nftl_scan_bbt;
- return 1;
- }
-}
-
-static inline int __init doc2001plus_init(struct mtd_info *mtd)
-{
- struct nand_chip *this = mtd->priv;
- struct doc_priv *doc = this->priv;
-
- this->write_byte = NULL;
- this->read_byte = doc2001plus_read_byte;
- this->write_buf = doc2001plus_writebuf;
- this->read_buf = doc2001plus_readbuf;
- this->verify_buf = doc2001plus_verifybuf;
- this->scan_bbt = inftl_scan_bbt;
- this->hwcontrol = NULL;
- this->select_chip = doc2001plus_select_chip;
- this->cmdfunc = doc2001plus_command;
- this->enable_hwecc = doc2001plus_enable_hwecc;
-
- doc->chips_per_floor = 1;
- mtd->name = "DiskOnChip Millennium Plus";
-
- return 1;
-}
-
-static inline int __init doc_probe(unsigned long physadr)
-{
- unsigned char ChipID;
- struct mtd_info *mtd;
- struct nand_chip *nand;
- struct doc_priv *doc;
- void __iomem *virtadr;
- unsigned char save_control;
- unsigned char tmp, tmpb, tmpc;
- int reg, len, numchips;
- int ret = 0;
-
- virtadr = ioremap(physadr, DOC_IOREMAP_LEN);
- if (!virtadr) {
- printk(KERN_ERR "Diskonchip ioremap failed: 0x%x bytes at 0x%lx\n", DOC_IOREMAP_LEN, physadr);
- return -EIO;
- }
-
- /* It's not possible to cleanly detect the DiskOnChip - the
- * bootup procedure will put the device into reset mode, and
- * it's not possible to talk to it without actually writing
- * to the DOCControl register. So we store the current contents
- * of the DOCControl register's location, in case we later decide
- * that it's not a DiskOnChip, and want to put it back how we
- * found it.
- */
- save_control = ReadDOC(virtadr, DOCControl);
-
- /* Reset the DiskOnChip ASIC */
- WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_RESET,
- virtadr, DOCControl);
- WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_RESET,
- virtadr, DOCControl);
-
- /* Enable the DiskOnChip ASIC */
- WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_NORMAL,
- virtadr, DOCControl);
- WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_NORMAL,
- virtadr, DOCControl);
-
- ChipID = ReadDOC(virtadr, ChipID);
-
- switch(ChipID) {
- case DOC_ChipID_Doc2k:
- reg = DoC_2k_ECCStatus;
- break;
- case DOC_ChipID_DocMil:
- reg = DoC_ECCConf;
- break;
- case DOC_ChipID_DocMilPlus16:
- case DOC_ChipID_DocMilPlus32:
- case 0:
- /* Possible Millennium Plus, need to do more checks */
- /* Possibly release from power down mode */
- for (tmp = 0; (tmp < 4); tmp++)
- ReadDOC(virtadr, Mplus_Power);
-
- /* Reset the Millennium Plus ASIC */
- tmp = DOC_MODE_RESET | DOC_MODE_MDWREN | DOC_MODE_RST_LAT |
- DOC_MODE_BDECT;
- WriteDOC(tmp, virtadr, Mplus_DOCControl);
- WriteDOC(~tmp, virtadr, Mplus_CtrlConfirm);
-
- mdelay(1);
- /* Enable the Millennium Plus ASIC */
- tmp = DOC_MODE_NORMAL | DOC_MODE_MDWREN | DOC_MODE_RST_LAT |
- DOC_MODE_BDECT;
- WriteDOC(tmp, virtadr, Mplus_DOCControl);
- WriteDOC(~tmp, virtadr, Mplus_CtrlConfirm);
- mdelay(1);
-
- ChipID = ReadDOC(virtadr, ChipID);
-
- switch (ChipID) {
- case DOC_ChipID_DocMilPlus16:
- reg = DoC_Mplus_Toggle;
- break;
- case DOC_ChipID_DocMilPlus32:
- printk(KERN_ERR "DiskOnChip Millennium Plus 32MB is not supported, ignoring.\n");
- default:
- ret = -ENODEV;
- goto notfound;
- }
- break;
-
- default:
- ret = -ENODEV;
- goto notfound;
- }
- /* Check the TOGGLE bit in the ECC register */
- tmp = ReadDOC_(virtadr, reg) & DOC_TOGGLE_BIT;
- tmpb = ReadDOC_(virtadr, reg) & DOC_TOGGLE_BIT;
- tmpc = ReadDOC_(virtadr, reg) & DOC_TOGGLE_BIT;
- if ((tmp == tmpb) || (tmp != tmpc)) {
- printk(KERN_WARNING "Possible DiskOnChip at 0x%lx failed TOGGLE test, dropping.\n", physadr);
- ret = -ENODEV;
- goto notfound;
- }
-
- for (mtd = doclist; mtd; mtd = doc->nextdoc) {
- unsigned char oldval;
- unsigned char newval;
- nand = mtd->priv;
- doc = nand->priv;
- /* Use the alias resolution register to determine if this is
- in fact the same DOC aliased to a new address. If writes
- to one chip's alias resolution register change the value on
- the other chip, they're the same chip. */
- if (ChipID == DOC_ChipID_DocMilPlus16) {
- oldval = ReadDOC(doc->virtadr, Mplus_AliasResolution);
- newval = ReadDOC(virtadr, Mplus_AliasResolution);
- } else {
- oldval = ReadDOC(doc->virtadr, AliasResolution);
- newval = ReadDOC(virtadr, AliasResolution);
- }
- if (oldval != newval)
- continue;
- if (ChipID == DOC_ChipID_DocMilPlus16) {
- WriteDOC(~newval, virtadr, Mplus_AliasResolution);
- oldval = ReadDOC(doc->virtadr, Mplus_AliasResolution);
- WriteDOC(newval, virtadr, Mplus_AliasResolution); /* restore it */
- } else {
- WriteDOC(~newval, virtadr, AliasResolution);
- oldval = ReadDOC(doc->virtadr, AliasResolution);
- WriteDOC(newval, virtadr, AliasResolution); /* restore it */
- }
- newval = ~newval;
- if (oldval == newval) {
- printk(KERN_DEBUG "Found alias of DOC at 0x%lx to 0x%lx\n", doc->physadr, physadr);
- goto notfound;
- }
- }
-
- printk(KERN_NOTICE "DiskOnChip found at 0x%lx\n", physadr);
-
- len = sizeof(struct mtd_info) +
- sizeof(struct nand_chip) +
- sizeof(struct doc_priv) +
- (2 * sizeof(struct nand_bbt_descr));
- mtd = kmalloc(len, GFP_KERNEL);
- if (!mtd) {
- printk(KERN_ERR "DiskOnChip kmalloc (%d bytes) failed!\n", len);
- ret = -ENOMEM;
- goto fail;
- }
- memset(mtd, 0, len);
-
- nand = (struct nand_chip *) (mtd + 1);
- doc = (struct doc_priv *) (nand + 1);
- nand->bbt_td = (struct nand_bbt_descr *) (doc + 1);
- nand->bbt_md = nand->bbt_td + 1;
-
- mtd->priv = nand;
- mtd->owner = THIS_MODULE;
-
- nand->priv = doc;
- nand->select_chip = doc200x_select_chip;
- nand->hwcontrol = doc200x_hwcontrol;
- nand->dev_ready = doc200x_dev_ready;
- nand->waitfunc = doc200x_wait;
- nand->block_bad = doc200x_block_bad;
- nand->enable_hwecc = doc200x_enable_hwecc;
- nand->calculate_ecc = doc200x_calculate_ecc;
- nand->correct_data = doc200x_correct_data;
-
- nand->autooob = &doc200x_oobinfo;
- nand->eccmode = NAND_ECC_HW6_512;
- nand->options = NAND_USE_FLASH_BBT | NAND_HWECC_SYNDROME;
-
- doc->physadr = physadr;
- doc->virtadr = virtadr;
- doc->ChipID = ChipID;
- doc->curfloor = -1;
- doc->curchip = -1;
- doc->mh0_page = -1;
- doc->mh1_page = -1;
- doc->nextdoc = doclist;
-
- if (ChipID == DOC_ChipID_Doc2k)
- numchips = doc2000_init(mtd);
- else if (ChipID == DOC_ChipID_DocMilPlus16)
- numchips = doc2001plus_init(mtd);
- else
- numchips = doc2001_init(mtd);
-
- if ((ret = nand_scan(mtd, numchips))) {
- /* DBB note: i believe nand_release is necessary here, as
- buffers may have been allocated in nand_base. Check with
- Thomas. FIX ME! */
- /* nand_release will call del_mtd_device, but we haven't yet
- added it. This is handled without incident by
- del_mtd_device, as far as I can tell. */
- nand_release(mtd);
- kfree(mtd);
- goto fail;
- }
-
- /* Success! */
- doclist = mtd;
- return 0;
-
-notfound:
- /* Put back the contents of the DOCControl register, in case it's not
- actually a DiskOnChip. */
- WriteDOC(save_control, virtadr, DOCControl);
-fail:
- iounmap(virtadr);
- return ret;
-}
-
-static void release_nanddoc(void)
-{
- struct mtd_info *mtd, *nextmtd;
- struct nand_chip *nand;
- struct doc_priv *doc;
-
- for (mtd = doclist; mtd; mtd = nextmtd) {
- nand = mtd->priv;
- doc = nand->priv;
-
- nextmtd = doc->nextdoc;
- nand_release(mtd);
- iounmap(doc->virtadr);
- kfree(mtd);
- }
-}
-
-static int __init init_nanddoc(void)
-{
- int i, ret = 0;
-
- /* We could create the decoder on demand, if memory is a concern.
- * This way we have it handy, if an error happens
- *
- * Symbolsize is 10 (bits)
- * Primitve polynomial is x^10+x^3+1
- * first consecutive root is 510
- * primitve element to generate roots = 1
- * generator polinomial degree = 4
- */
- rs_decoder = init_rs(10, 0x409, FCR, 1, NROOTS);
- if (!rs_decoder) {
- printk (KERN_ERR "DiskOnChip: Could not create a RS decoder\n");
- return -ENOMEM;
- }
-
- if (doc_config_location) {
- printk(KERN_INFO "Using configured DiskOnChip probe address 0x%lx\n", doc_config_location);
- ret = doc_probe(doc_config_location);
- if (ret < 0)
- goto outerr;
- } else {
- for (i=0; (doc_locations[i] != 0xffffffff); i++) {
- doc_probe(doc_locations[i]);
- }
- }
- /* No banner message any more. Print a message if no DiskOnChip
- found, so the user knows we at least tried. */
- if (!doclist) {
- printk(KERN_INFO "No valid DiskOnChip devices found\n");
- ret = -ENODEV;
- goto outerr;
- }
- return 0;
-outerr:
- free_rs(rs_decoder);
- return ret;
-}
-
-static void __exit cleanup_nanddoc(void)
-{
- /* Cleanup the nand/DoC resources */
- release_nanddoc();
-
- /* Free the reed solomon resources */
- if (rs_decoder) {
- free_rs(rs_decoder);
- }
-}
-
-module_init(init_nanddoc);
-module_exit(cleanup_nanddoc);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("David Woodhouse <dwmw2 at infradead.org>");
-MODULE_DESCRIPTION("M-Systems DiskOnChip 2000, Millennium and Millennium Plus device driver\n");
-#endif
--
1.7.10
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