Commit efa2ca73 authored by Robert Jarzmik's avatar Robert Jarzmik Committed by Artem Bityutskiy

mtd: Add DiskOnChip G3 support

Add support for DiskOnChip G3 chips. The support is quite
limited yet :
 - no flash writes/erases are implemented
 - ECC fixes are not implemented
 - powerdown is not implemented
 - IPL handling is not yet done

On the brighter side, the chip reading does work.
Signed-off-by: default avatarRobert Jarzmik <robert.jarzmik@free.fr>
parent 86a9893d
......@@ -249,6 +249,16 @@ config MTD_DOC2001PLUS
under "NAND Flash Device Drivers" (currently that driver does not
support all Millennium Plus devices).
config MTD_DOCG3
tristate "M-Systems Disk-On-Chip G3"
---help---
This provides an MTD device driver for the M-Systems DiskOnChip
G3 devices.
The driver provides access to G3 DiskOnChip, distributed by
M-Systems and now Sandisk. The support is very experimental,
and doesn't give access to any write operations.
config MTD_DOCPROBE
tristate
select MTD_DOCECC
......
......@@ -5,6 +5,7 @@
obj-$(CONFIG_MTD_DOC2000) += doc2000.o
obj-$(CONFIG_MTD_DOC2001) += doc2001.o
obj-$(CONFIG_MTD_DOC2001PLUS) += doc2001plus.o
obj-$(CONFIG_MTD_DOCG3) += docg3.o
obj-$(CONFIG_MTD_DOCPROBE) += docprobe.o
obj-$(CONFIG_MTD_DOCECC) += docecc.o
obj-$(CONFIG_MTD_SLRAM) += slram.o
......@@ -17,3 +18,5 @@ obj-$(CONFIG_MTD_BLOCK2MTD) += block2mtd.o
obj-$(CONFIG_MTD_DATAFLASH) += mtd_dataflash.o
obj-$(CONFIG_MTD_M25P80) += m25p80.o
obj-$(CONFIG_MTD_SST25L) += sst25l.o
CFLAGS_docg3.o += -I$(src)
\ No newline at end of file
/*
* Handles the M-Systems DiskOnChip G3 chip
*
* Copyright (C) 2011 Robert Jarzmik
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/platform_device.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/io.h>
#include <linux/delay.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#define CREATE_TRACE_POINTS
#include "docg3.h"
/*
* This driver handles the DiskOnChip G3 flash memory.
*
* As no specification is available from M-Systems/Sandisk, this drivers lacks
* several functions available on the chip, as :
* - block erase
* - page write
* - IPL write
* - ECC fixing (lack of BCH algorith understanding)
* - powerdown / powerup
*
* The bus data width (8bits versus 16bits) is not handled (if_cfg flag), and
* the driver assumes a 16bits data bus.
*
* DocG3 relies on 2 ECC algorithms, which are handled in hardware :
* - a 1 byte Hamming code stored in the OOB for each page
* - a 7 bytes BCH code stored in the OOB for each page
* The BCH part is only used for check purpose, no correction is available as
* some information is missing. What is known is that :
* - BCH is in GF(2^14)
* - BCH is over data of 520 bytes (512 page + 7 page_info bytes
* + 1 hamming byte)
* - BCH can correct up to 4 bits (t = 4)
* - BCH syndroms are calculated in hardware, and checked in hardware as well
*
*/
static inline u8 doc_readb(struct docg3 *docg3, u16 reg)
{
u8 val = readb(docg3->base + reg);
trace_docg3_io(0, 8, reg, (int)val);
return val;
}
static inline u16 doc_readw(struct docg3 *docg3, u16 reg)
{
u16 val = readw(docg3->base + reg);
trace_docg3_io(0, 16, reg, (int)val);
return val;
}
static inline void doc_writeb(struct docg3 *docg3, u8 val, u16 reg)
{
writeb(val, docg3->base + reg);
trace_docg3_io(1, 16, reg, val);
}
static inline void doc_writew(struct docg3 *docg3, u16 val, u16 reg)
{
writew(val, docg3->base + reg);
trace_docg3_io(1, 16, reg, val);
}
static inline void doc_flash_command(struct docg3 *docg3, u8 cmd)
{
doc_writeb(docg3, cmd, DOC_FLASHCOMMAND);
}
static inline void doc_flash_sequence(struct docg3 *docg3, u8 seq)
{
doc_writeb(docg3, seq, DOC_FLASHSEQUENCE);
}
static inline void doc_flash_address(struct docg3 *docg3, u8 addr)
{
doc_writeb(docg3, addr, DOC_FLASHADDRESS);
}
static char const *part_probes[] = { "cmdlinepart", "saftlpart", NULL };
static int doc_register_readb(struct docg3 *docg3, int reg)
{
u8 val;
doc_writew(docg3, reg, DOC_READADDRESS);
val = doc_readb(docg3, reg);
doc_vdbg("Read register %04x : %02x\n", reg, val);
return val;
}
static int doc_register_readw(struct docg3 *docg3, int reg)
{
u16 val;
doc_writew(docg3, reg, DOC_READADDRESS);
val = doc_readw(docg3, reg);
doc_vdbg("Read register %04x : %04x\n", reg, val);
return val;
}
/**
* doc_delay - delay docg3 operations
* @docg3: the device
* @nbNOPs: the number of NOPs to issue
*
* As no specification is available, the right timings between chip commands are
* unknown. The only available piece of information are the observed nops on a
* working docg3 chip.
* Therefore, doc_delay relies on a busy loop of NOPs, instead of scheduler
* friendlier msleep() functions or blocking mdelay().
*/
static void doc_delay(struct docg3 *docg3, int nbNOPs)
{
int i;
doc_dbg("NOP x %d\n", nbNOPs);
for (i = 0; i < nbNOPs; i++)
doc_writeb(docg3, 0, DOC_NOP);
}
static int is_prot_seq_error(struct docg3 *docg3)
{
int ctrl;
ctrl = doc_register_readb(docg3, DOC_FLASHCONTROL);
return ctrl & (DOC_CTRL_PROTECTION_ERROR | DOC_CTRL_SEQUENCE_ERROR);
}
static int doc_is_ready(struct docg3 *docg3)
{
int ctrl;
ctrl = doc_register_readb(docg3, DOC_FLASHCONTROL);
return ctrl & DOC_CTRL_FLASHREADY;
}
static int doc_wait_ready(struct docg3 *docg3)
{
int maxWaitCycles = 100;
do {
doc_delay(docg3, 4);
cpu_relax();
} while (!doc_is_ready(docg3) && maxWaitCycles--);
doc_delay(docg3, 2);
if (maxWaitCycles > 0)
return 0;
else
return -EIO;
}
static int doc_reset_seq(struct docg3 *docg3)
{
int ret;
doc_writeb(docg3, 0x10, DOC_FLASHCONTROL);
doc_flash_sequence(docg3, DOC_SEQ_RESET);
doc_flash_command(docg3, DOC_CMD_RESET);
doc_delay(docg3, 2);
ret = doc_wait_ready(docg3);
doc_dbg("doc_reset_seq() -> isReady=%s\n", ret ? "false" : "true");
return ret;
}
/**
* doc_read_data_area - Read data from data area
* @docg3: the device
* @buf: the buffer to fill in
* @len: the lenght to read
* @first: first time read, DOC_READADDRESS should be set
*
* Reads bytes from flash data. Handles the single byte / even bytes reads.
*/
static void doc_read_data_area(struct docg3 *docg3, void *buf, int len,
int first)
{
int i, cdr, len4;
u16 data16, *dst16;
u8 data8, *dst8;
doc_dbg("doc_read_data_area(buf=%p, len=%d)\n", buf, len);
cdr = len & 0x3;
len4 = len - cdr;
if (first)
doc_writew(docg3, DOC_IOSPACE_DATA, DOC_READADDRESS);
dst16 = buf;
for (i = 0; i < len4; i += 2) {
data16 = doc_readw(docg3, DOC_IOSPACE_DATA);
*dst16 = data16;
dst16++;
}
if (cdr) {
doc_writew(docg3, DOC_IOSPACE_DATA | DOC_READADDR_ONE_BYTE,
DOC_READADDRESS);
doc_delay(docg3, 1);
dst8 = (u8 *)dst16;
for (i = 0; i < cdr; i++) {
data8 = doc_readb(docg3, DOC_IOSPACE_DATA);
*dst8 = data8;
dst8++;
}
}
}
/**
* doc_set_data_mode - Sets the flash to reliable data mode
* @docg3: the device
*
* The reliable data mode is a bit slower than the fast mode, but less errors
* occur. Entering the reliable mode cannot be done without entering the fast
* mode first.
*/
static void doc_set_reliable_mode(struct docg3 *docg3)
{
doc_dbg("doc_set_reliable_mode()\n");
doc_flash_sequence(docg3, DOC_SEQ_SET_MODE);
doc_flash_command(docg3, DOC_CMD_FAST_MODE);
doc_flash_command(docg3, DOC_CMD_RELIABLE_MODE);
doc_delay(docg3, 2);
}
/**
* doc_set_asic_mode - Set the ASIC mode
* @docg3: the device
* @mode: the mode
*
* The ASIC can work in 3 modes :
* - RESET: all registers are zeroed
* - NORMAL: receives and handles commands
* - POWERDOWN: minimal poweruse, flash parts shut off
*/
static void doc_set_asic_mode(struct docg3 *docg3, u8 mode)
{
int i;
for (i = 0; i < 12; i++)
doc_readb(docg3, DOC_IOSPACE_IPL);
mode |= DOC_ASICMODE_MDWREN;
doc_dbg("doc_set_asic_mode(%02x)\n", mode);
doc_writeb(docg3, mode, DOC_ASICMODE);
doc_writeb(docg3, ~mode, DOC_ASICMODECONFIRM);
doc_delay(docg3, 1);
}
/**
* doc_set_device_id - Sets the devices id for cascaded G3 chips
* @docg3: the device
* @id: the chip to select (amongst 0, 1, 2, 3)
*
* There can be 4 cascaded G3 chips. This function selects the one which will
* should be the active one.
*/
static void doc_set_device_id(struct docg3 *docg3, int id)
{
u8 ctrl;
doc_dbg("doc_set_device_id(%d)\n", id);
doc_writeb(docg3, id, DOC_DEVICESELECT);
ctrl = doc_register_readb(docg3, DOC_FLASHCONTROL);
ctrl &= ~DOC_CTRL_VIOLATION;
ctrl |= DOC_CTRL_CE;
doc_writeb(docg3, ctrl, DOC_FLASHCONTROL);
}
/**
* doc_set_extra_page_mode - Change flash page layout
* @docg3: the device
*
* Normally, the flash page is split into the data (512 bytes) and the out of
* band data (16 bytes). For each, 4 more bytes can be accessed, where the wear
* leveling counters are stored. To access this last area of 4 bytes, a special
* mode must be input to the flash ASIC.
*
* Returns 0 if no error occured, -EIO else.
*/
static int doc_set_extra_page_mode(struct docg3 *docg3)
{
int fctrl;
doc_dbg("doc_set_extra_page_mode()\n");
doc_flash_sequence(docg3, DOC_SEQ_PAGE_SIZE_532);
doc_flash_command(docg3, DOC_CMD_PAGE_SIZE_532);
doc_delay(docg3, 2);
fctrl = doc_register_readb(docg3, DOC_FLASHCONTROL);
if (fctrl & (DOC_CTRL_PROTECTION_ERROR | DOC_CTRL_SEQUENCE_ERROR))
return -EIO;
else
return 0;
}
/**
* doc_seek - Set both flash planes to the specified block, page for reading
* @docg3: the device
* @block0: the first plane block index
* @block1: the second plane block index
* @page: the page index within the block
* @wear: if true, read will occur on the 4 extra bytes of the wear area
* @ofs: offset in page to read
*
* Programs the flash even and odd planes to the specific block and page.
* Alternatively, programs the flash to the wear area of the specified page.
*/
static int doc_read_seek(struct docg3 *docg3, int block0, int block1, int page,
int wear, int ofs)
{
int sector, ret = 0;
doc_dbg("doc_seek(blocks=(%d,%d), page=%d, ofs=%d, wear=%d)\n",
block0, block1, page, ofs, wear);
if (!wear && (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_set_reliable_mode(docg3);
if (wear)
ret = doc_set_extra_page_mode(docg3);
if (ret)
goto out;
sector = (block0 << DOC_ADDR_BLOCK_SHIFT) + (page & DOC_ADDR_PAGE_MASK);
doc_flash_sequence(docg3, DOC_SEQ_READ);
doc_flash_command(docg3, DOC_CMD_PROG_BLOCK_ADDR);
doc_delay(docg3, 1);
doc_flash_address(docg3, sector & 0xff);
doc_flash_address(docg3, (sector >> 8) & 0xff);
doc_flash_address(docg3, (sector >> 16) & 0xff);
doc_delay(docg3, 1);
sector = (block1 << DOC_ADDR_BLOCK_SHIFT) + (page & DOC_ADDR_PAGE_MASK);
doc_flash_command(docg3, DOC_CMD_PROG_BLOCK_ADDR);
doc_delay(docg3, 1);
doc_flash_address(docg3, sector & 0xff);
doc_flash_address(docg3, (sector >> 8) & 0xff);
doc_flash_address(docg3, (sector >> 16) & 0xff);
doc_delay(docg3, 2);
out:
return ret;
}
/**
* doc_read_page_ecc_init - Initialize hardware ECC engine
* @docg3: the device
* @len: the number of bytes covered by the ECC (BCH covered)
*
* The function does initialize the hardware ECC engine to compute the Hamming
* ECC (on 1 byte) and the BCH Syndroms (on 7 bytes).
*
* Return 0 if succeeded, -EIO on error
*/
static int doc_read_page_ecc_init(struct docg3 *docg3, int len)
{
doc_writew(docg3, DOC_ECCCONF0_READ_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);
}
/**
* doc_read_page_prepare - Prepares reading data from a flash page
* @docg3: the device
* @block0: the first plane block index on flash memory
* @block1: the second plane block index on flash memory
* @page: the page index in the block
* @offset: the offset in the page (must be a multiple of 4)
*
* Prepares the page to be read in the flash memory :
* - tell ASIC to map the flash pages
* - tell ASIC to be in read mode
*
* After a call to this method, a call to doc_read_page_finish is mandatory,
* to end the read cycle of the flash.
*
* Read data from a flash page. The length to be read must be between 0 and
* (page_size + oob_size + wear_size), ie. 532, and a multiple of 4 (because
* the extra bytes reading is not implemented).
*
* As pages are grouped by 2 (in 2 planes), reading from a page must be done
* in two steps:
* - one read of 512 bytes at offset 0
* - one read of 512 bytes at offset 512 + 16
*
* Returns 0 if successful, -EIO if a read error occured.
*/
static int doc_read_page_prepare(struct docg3 *docg3, int block0, int block1,
int page, int offset)
{
int wear_area = 0, ret = 0;
doc_dbg("doc_read_page_prepare(blocks=(%d,%d), page=%d, ofsInPage=%d)\n",
block0, block1, page, offset);
if (offset >= DOC_LAYOUT_WEAR_OFFSET)
wear_area = 1;
if (!wear_area && offset > (DOC_LAYOUT_PAGE_OOB_SIZE * 2))
return -EINVAL;
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_read_seek(docg3, block0, block1, page, wear_area, offset);
if (ret)
goto err;
doc_flash_command(docg3, DOC_CMD_READ_ALL_PLANES);
doc_delay(docg3, 2);
doc_wait_ready(docg3);
doc_flash_command(docg3, DOC_CMD_SET_ADDR_READ);
doc_delay(docg3, 1);
if (offset >= DOC_LAYOUT_PAGE_SIZE * 2)
offset -= 2 * DOC_LAYOUT_PAGE_SIZE;
doc_flash_address(docg3, offset >> 2);
doc_delay(docg3, 1);
doc_wait_ready(docg3);
doc_flash_command(docg3, DOC_CMD_READ_FLASH);
return 0;
err:
doc_writeb(docg3, 0, DOC_DATAEND);
doc_delay(docg3, 2);
return -EIO;
}
/**
* doc_read_page_getbytes - Reads bytes from a prepared page
* @docg3: the device
* @len: the number of bytes to be read (must be a multiple of 4)
* @buf: the buffer to be filled in
* @first: 1 if first time read, DOC_READADDRESS should be set
*
*/
static int doc_read_page_getbytes(struct docg3 *docg3, int len, u_char *buf,
int first)
{
doc_read_data_area(docg3, buf, len, first);
doc_delay(docg3, 2);
return len;
}
/**
* doc_get_hw_bch_syndroms - Get hardware calculated BCH syndroms
* @docg3: the device
* @syns: the array of 7 integers where the syndroms will be stored
*/
static void doc_get_hw_bch_syndroms(struct docg3 *docg3, int *syns)
{
int i;
for (i = 0; i < DOC_ECC_BCH_SIZE; i++)
syns[i] = doc_register_readb(docg3, DOC_BCH_SYNDROM(i));
}
/**
* doc_read_page_finish - Ends reading of a flash page
* @docg3: the device
*
* As a side effect, resets the chip selector to 0. This ensures that after each
* read operation, the floor 0 is selected. Therefore, if the systems halts, the
* reboot will boot on floor 0, where the IPL is.
*/
static void doc_read_page_finish(struct docg3 *docg3)
{
doc_writeb(docg3, 0, DOC_DATAEND);
doc_delay(docg3, 2);
doc_set_device_id(docg3, 0);
}
/**
* calc_block_sector - Calculate blocks, pages and ofs.
* @from: offset in flash
* @block0: first plane block index calculated
* @block1: second plane block index calculated
* @page: page calculated
* @ofs: offset in page
*/
static void calc_block_sector(loff_t from, int *block0, int *block1, int *page,
int *ofs)
{
uint sector;
sector = from / DOC_LAYOUT_PAGE_SIZE;
*block0 = sector / (DOC_LAYOUT_PAGES_PER_BLOCK * DOC_LAYOUT_NBPLANES)
* DOC_LAYOUT_NBPLANES;
*block1 = *block0 + 1;
*page = sector % (DOC_LAYOUT_PAGES_PER_BLOCK * DOC_LAYOUT_NBPLANES);
*page /= DOC_LAYOUT_NBPLANES;
if (sector % 2)
*ofs = DOC_LAYOUT_PAGE_OOB_SIZE;
else
*ofs = 0;
}
/**
* doc_read - Read bytes from flash
* @mtd: the device
* @from: the offset from first block and first page, in bytes, aligned on page
* size
* @len: the number of bytes to read (must be a multiple of 4)
* @retlen: the number of bytes actually read
* @buf: the filled in buffer
*
* Reads flash memory pages. This function does not read the OOB chunk, but only
* the page data.
*
* Returns 0 if read successfull, of -EIO, -EINVAL if an error occured
*/
static int doc_read(struct mtd_info *mtd, loff_t from, size_t len,
size_t *retlen, u_char *buf)
{
struct docg3 *docg3 = mtd->priv;
int block0, block1, page, readlen, ret, ofs = 0;
int syn[DOC_ECC_BCH_SIZE], eccconf1;
u8 oob[DOC_LAYOUT_OOB_SIZE];
ret = -EINVAL;
doc_dbg("doc_read(from=%lld, len=%zu, buf=%p)\n", from, len, buf);
if (from % DOC_LAYOUT_PAGE_SIZE)
goto err;
if (len % 4)
goto err;
calc_block_sector(from, &block0, &block1, &page, &ofs);
if (block1 > docg3->max_block)
goto err;
*retlen = 0;
ret = 0;
readlen = min_t(size_t, len, (size_t)DOC_LAYOUT_PAGE_SIZE);
while (!ret && len > 0) {
readlen = min_t(size_t, len, (size_t)DOC_LAYOUT_PAGE_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_COVERED_BYTES);
if (ret < 0)
goto err_in_read;
ret = doc_read_page_getbytes(docg3, readlen, buf, 1);
if (ret < readlen)
goto err_in_read;
ret = doc_read_page_getbytes(docg3, DOC_LAYOUT_OOB_SIZE,
oob, 0);
if (ret < DOC_LAYOUT_OOB_SIZE)
goto err_in_read;
*retlen += readlen;
buf += readlen;
len -= readlen;
ofs ^= DOC_LAYOUT_PAGE_OOB_SIZE;
if (ofs == 0)
page += 2;
if (page > DOC_ADDR_PAGE_MASK) {
page = 0;
block0 += 2;
block1 += 2;
}
/*
* There should be a BCH bitstream fixing algorithm here ...
* By now, a page read failure is triggered by BCH error
*/
doc_get_hw_bch_syndroms(docg3, syn);
eccconf1 = doc_register_readb(docg3, DOC_ECCCONF1);
doc_dbg("OOB - INFO: %02x:%02x:%02x:%02x:%02x:%02x:%02x\n",
oob[0], oob[1], oob[2], oob[3], oob[4],
oob[5], oob[6]);
doc_dbg("OOB - HAMMING: %02x\n", oob[7]);
doc_dbg("OOB - BCH_ECC: %02x:%02x:%02x:%02x:%02x:%02x:%02x\n",
oob[8], oob[9], oob[10], oob[11], oob[12],
oob[13], oob[14]);
doc_dbg("OOB - UNUSED: %02x\n", oob[15]);
doc_dbg("ECC checks: ECCConf1=%x\n", eccconf1);
doc_dbg("ECC BCH syndrom: %02x:%02x:%02x:%02x:%02x:%02x:%02x\n",
syn[0], syn[1], syn[2], syn[3], syn[4], syn[5], syn[6]);
ret = -EBADMSG;
if (block0 >= DOC_LAYOUT_BLOCK_FIRST_DATA) {
if (eccconf1 & DOC_ECCCONF1_BCH_SYNDROM_ERR)
goto err_in_read;
if (is_prot_seq_error(docg3))
goto err_in_read;
}
doc_read_page_finish(docg3);
}
return 0;
err_in_read:
doc_read_page_finish(docg3);
err:
return ret;
}
/**
* doc_read_oob - Read out of band bytes from flash
* @mtd: the device
* @from: the offset from first block and first page, in bytes, aligned on page
* size
* @ops: the mtd oob structure
*
* Reads flash memory OOB area of pages.
*
* Returns 0 if read successfull, of -EIO, -EINVAL if an error occured
*/
static int doc_read_oob(struct mtd_info *mtd, loff_t from,
struct mtd_oob_ops *ops)
{
struct docg3 *docg3 = mtd->priv;
int block0, block1, page, ofs, ret;
u8 *buf = ops->oobbuf;
size_t len = ops->ooblen;
doc_dbg("doc_read_oob(from=%lld, buf=%p, len=%zu)\n", from, buf, len);
if (len != DOC_LAYOUT_OOB_SIZE)
return -EINVAL;
switch (ops->mode) {
case MTD_OPS_PLACE_OOB:
buf += ops->ooboffs;
break;
default:
break;
}
calc_block_sector(from, &block0, &block1, &page, &ofs);
if (block1 > docg3->max_block)
return -EINVAL;
ret = doc_read_page_prepare(docg3, block0, block1, page,
ofs + DOC_LAYOUT_PAGE_SIZE);
if (!ret)
ret = doc_read_page_ecc_init(docg3, DOC_LAYOUT_OOB_SIZE);
if (!ret)
ret = doc_read_page_getbytes(docg3, DOC_LAYOUT_OOB_SIZE,
buf, 1);
doc_read_page_finish(docg3);
if (ret > 0)
ops->oobretlen = ret;
else
ops->oobretlen = 0;
return (ret > 0) ? 0 : 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);
buf += DOC_LAYOUT_PAGE_SIZE;
}
doc_read_page_finish(docg3);
return ret;
}
/**
* doc_block_isbad - Checks whether a block is good or not
* @mtd: the device
* @from: the offset to find the correct block
*
* Returns 1 if block is bad, 0 if block is good
*/
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);
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;
}
/**
* doc_get_erase_count - Get block erase count
* @docg3: the device
* @from: the offset in which the block is.
*
* Get the number of times a block was erased. The number is the maximum of
* erase times between first and second plane (which should be equal normally).
*
* Returns The number of erases, or -EINVAL or -EIO on error.
*/
static int doc_get_erase_count(struct docg3 *docg3, loff_t from)
{
u8 buf[DOC_LAYOUT_WEAR_SIZE];
int ret, plane1_erase_count, plane2_erase_count;
int block0, block1, page, ofs;
doc_dbg("doc_get_erase_count(from=%lld, buf=%p)\n", from, buf);
if (from % DOC_LAYOUT_PAGE_SIZE)
return -EINVAL;
calc_block_sector(from, &block0, &block1, &page, &ofs);
if (block1 > docg3->max_block)
return -EINVAL;
ret = doc_reset_seq(docg3);
if (!ret)
ret = doc_read_page_prepare(docg3, block0, block1, page,
ofs + DOC_LAYOUT_WEAR_OFFSET);
if (!ret)
ret = doc_read_page_getbytes(docg3, DOC_LAYOUT_WEAR_SIZE,
buf, 1);
doc_read_page_finish(docg3);
if (ret || (buf[0] != DOC_ERASE_MARK) || (buf[2] != DOC_ERASE_MARK))
return -EIO;
plane1_erase_count = (u8)(~buf[1]) | ((u8)(~buf[4]) << 8)
| ((u8)(~buf[5]) << 16);
plane2_erase_count = (u8)(~buf[3]) | ((u8)(~buf[6]) << 8)
| ((u8)(~buf[7]) << 16);
return max(plane1_erase_count, plane2_erase_count);
}
/*
* Debug sysfs entries
*/
static int dbg_flashctrl_show(struct seq_file *s, void *p)
{
struct docg3 *docg3 = (struct docg3 *)s->private;
int pos = 0;
u8 fctrl = doc_register_readb(docg3, DOC_FLASHCONTROL);
pos += seq_printf(s,
"FlashControl : 0x%02x (%s,CE# %s,%s,%s,flash %s)\n",
fctrl,
fctrl & DOC_CTRL_VIOLATION ? "protocol violation" : "-",
fctrl & DOC_CTRL_CE ? "active" : "inactive",
fctrl & DOC_CTRL_PROTECTION_ERROR ? "protection error" : "-",
fctrl & DOC_CTRL_SEQUENCE_ERROR ? "sequence error" : "-",
fctrl & DOC_CTRL_FLASHREADY ? "ready" : "not ready");
return pos;
}
DEBUGFS_RO_ATTR(flashcontrol, dbg_flashctrl_show);
static int dbg_asicmode_show(struct seq_file *s, void *p)
{
struct docg3 *docg3 = (struct docg3 *)s->private;
int pos = 0;
int pctrl = doc_register_readb(docg3, DOC_ASICMODE);
int mode = pctrl & 0x03;
pos += seq_printf(s,
"%04x : RAM_WE=%d,RSTIN_RESET=%d,BDETCT_RESET=%d,WRITE_ENABLE=%d,POWERDOWN=%d,MODE=%d%d (",
pctrl,
pctrl & DOC_ASICMODE_RAM_WE ? 1 : 0,
pctrl & DOC_ASICMODE_RSTIN_RESET ? 1 : 0,
pctrl & DOC_ASICMODE_BDETCT_RESET ? 1 : 0,
pctrl & DOC_ASICMODE_MDWREN ? 1 : 0,
pctrl & DOC_ASICMODE_POWERDOWN ? 1 : 0,
mode >> 1, mode & 0x1);
switch (mode) {
case DOC_ASICMODE_RESET:
pos += seq_printf(s, "reset");
break;
case DOC_ASICMODE_NORMAL:
pos += seq_printf(s, "normal");
break;
case DOC_ASICMODE_POWERDOWN:
pos += seq_printf(s, "powerdown");
break;
}
pos += seq_printf(s, ")\n");
return pos;
}
DEBUGFS_RO_ATTR(asic_mode, dbg_asicmode_show);
static int dbg_device_id_show(struct seq_file *s, void *p)
{
struct docg3 *docg3 = (struct docg3 *)s->private;
int pos = 0;
int id = doc_register_readb(docg3, DOC_DEVICESELECT);
pos += seq_printf(s, "DeviceId = %d\n", id);
return pos;
}
DEBUGFS_RO_ATTR(device_id, dbg_device_id_show);
static int dbg_protection_show(struct seq_file *s, void *p)
{
struct docg3 *docg3 = (struct docg3 *)s->private;
int pos = 0;
int protect = doc_register_readb(docg3, DOC_PROTECTION);
int dps0 = doc_register_readb(docg3, DOC_DPS0_STATUS);
int dps0_low = doc_register_readb(docg3, DOC_DPS0_ADDRLOW);
int dps0_high = doc_register_readb(docg3, DOC_DPS0_ADDRHIGH);
int dps1 = doc_register_readb(docg3, DOC_DPS1_STATUS);
int dps1_low = doc_register_readb(docg3, DOC_DPS1_ADDRLOW);
int dps1_high = doc_register_readb(docg3, DOC_DPS1_ADDRHIGH);
pos += seq_printf(s, "Protection = 0x%02x (",
protect);
if (protect & DOC_PROTECT_FOUNDRY_OTP_LOCK)
pos += seq_printf(s, "FOUNDRY_OTP_LOCK,");
if (protect & DOC_PROTECT_CUSTOMER_OTP_LOCK)
pos += seq_printf(s, "CUSTOMER_OTP_LOCK,");
if (protect & DOC_PROTECT_LOCK_INPUT)
pos += seq_printf(s, "LOCK_INPUT,");
if (protect & DOC_PROTECT_STICKY_LOCK)
pos += seq_printf(s, "STICKY_LOCK,");
if (protect & DOC_PROTECT_PROTECTION_ENABLED)
pos += seq_printf(s, "PROTECTION ON,");
if (protect & DOC_PROTECT_IPL_DOWNLOAD_LOCK)
pos += seq_printf(s, "IPL_DOWNLOAD_LOCK,");
if (protect & DOC_PROTECT_PROTECTION_ERROR)
pos += seq_printf(s, "PROTECT_ERR,");
else
pos += seq_printf(s, "NO_PROTECT_ERR");
pos += seq_printf(s, ")\n");
pos += seq_printf(s, "DPS0 = 0x%02x : "
"Protected area [0x%x - 0x%x] : OTP=%d, READ=%d, "
"WRITE=%d, HW_LOCK=%d, KEY_OK=%d\n",
dps0, dps0_low, dps0_high,
!!(dps0 & DOC_DPS_OTP_PROTECTED),
!!(dps0 & DOC_DPS_READ_PROTECTED),
!!(dps0 & DOC_DPS_WRITE_PROTECTED),
!!(dps0 & DOC_DPS_HW_LOCK_ENABLED),
!!(dps0 & DOC_DPS_KEY_OK));
pos += seq_printf(s, "DPS1 = 0x%02x : "
"Protected area [0x%x - 0x%x] : OTP=%d, READ=%d, "
"WRITE=%d, HW_LOCK=%d, KEY_OK=%d\n",
dps1, dps1_low, dps1_high,
!!(dps1 & DOC_DPS_OTP_PROTECTED),
!!(dps1 & DOC_DPS_READ_PROTECTED),
!!(dps1 & DOC_DPS_WRITE_PROTECTED),
!!(dps1 & DOC_DPS_HW_LOCK_ENABLED),
!!(dps1 & DOC_DPS_KEY_OK));
return pos;
}
DEBUGFS_RO_ATTR(protection, dbg_protection_show);
static int __init doc_dbg_register(struct docg3 *docg3)
{
struct dentry *root, *entry;
root = debugfs_create_dir("docg3", NULL);
if (!root)
return -ENOMEM;
entry = debugfs_create_file("flashcontrol", S_IRUSR, root, docg3,
&flashcontrol_fops);
if (entry)
entry = debugfs_create_file("asic_mode", S_IRUSR, root,
docg3, &asic_mode_fops);
if (entry)
entry = debugfs_create_file("device_id", S_IRUSR, root,
docg3, &device_id_fops);
if (entry)
entry = debugfs_create_file("protection", S_IRUSR, root,
docg3, &protection_fops);
if (entry) {
docg3->debugfs_root = root;
return 0;
} else {
debugfs_remove_recursive(root);
return -ENOMEM;
}
}
static void __exit doc_dbg_unregister(struct docg3 *docg3)
{
debugfs_remove_recursive(docg3->debugfs_root);
}
/**
* doc_set_driver_info - Fill the mtd_info structure and docg3 structure
* @chip_id: The chip ID of the supported chip
* @mtd: The structure to fill
*/
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);
switch (chip_id) {
case DOC_CHIPID_G3:
mtd->name = "DiskOnChip G3";
docg3->max_block = 2047;
break;
}
mtd->type = MTD_NANDFLASH;
/*
* Once write methods are added, the correct flags will be set.
* mtd->flags = MTD_CAP_NANDFLASH;
*/
mtd->flags = MTD_CAP_ROM;
mtd->size = (docg3->max_block + 1) * DOC_LAYOUT_BLOCK_SIZE;
mtd->erasesize = DOC_LAYOUT_BLOCK_SIZE * DOC_LAYOUT_NBPLANES;
mtd->writesize = DOC_LAYOUT_PAGE_SIZE;
mtd->oobsize = DOC_LAYOUT_OOB_SIZE;
mtd->owner = THIS_MODULE;
mtd->erase = NULL;
mtd->point = NULL;
mtd->unpoint = NULL;
mtd->read = doc_read;
mtd->write = NULL;
mtd->read_oob = doc_read_oob;
mtd->write_oob = NULL;
mtd->sync = NULL;
mtd->block_isbad = doc_block_isbad;
}
/**
* doc_probe - Probe the IO space for a DiskOnChip G3 chip
* @pdev: platform device
*
* Probes for a G3 chip at the specified IO space in the platform data
* ressources.
*
* Returns 0 on success, -ENOMEM, -ENXIO on error
*/
static int __init docg3_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct docg3 *docg3;
struct mtd_info *mtd;
struct resource *ress;
int ret, bbt_nbpages;
u16 chip_id, chip_id_inv;
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;
ret = -ENXIO;
ress = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!ress) {
dev_err(dev, "No I/O memory resource defined\n");
goto noress;
}
docg3->base = ioremap(ress->start, DOC_IOSPACE_SIZE);
docg3->dev = &pdev->dev;
docg3->device_id = 0;
doc_set_device_id(docg3, docg3->device_id);
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 = -ENODEV;
if (chip_id != (u16)(~chip_id_inv)) {
doc_info("No device found at IO addr %p\n",
(void *)ress->start);
goto nochipfound;
}
switch (chip_id) {
case DOC_CHIPID_G3:
doc_info("Found a G3 DiskOnChip at addr %p\n",
(void *)ress->start);
break;
default:
doc_err("Chip id %04x is not a DiskOnChip G3 chip\n", chip_id);
goto nochipfound;
}
doc_set_driver_info(chip_id, mtd);
platform_set_drvdata(pdev, mtd);
ret = -ENOMEM;
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 nochipfound;
doc_reload_bbt(docg3);
ret = mtd_device_parse_register(mtd, part_probes,
NULL, NULL, 0);
if (ret)
goto register_error;
doc_dbg_register(docg3);
return 0;
register_error:
kfree(docg3->bbt);
nochipfound:
iounmap(docg3->base);
noress:
kfree(mtd);
nomem2:
kfree(docg3);
nomem1:
return ret;
}
/**
* docg3_release - Release the driver
* @pdev: the platform device
*
* Returns 0
*/
static int __exit docg3_release(struct platform_device *pdev)
{
struct mtd_info *mtd = platform_get_drvdata(pdev);
struct docg3 *docg3 = mtd->priv;
doc_dbg_unregister(docg3);
mtd_device_unregister(mtd);
iounmap(docg3->base);
kfree(docg3->bbt);
kfree(docg3);
kfree(mtd);
return 0;
}
static struct platform_driver g3_driver = {
.driver = {
.name = "docg3",
.owner = THIS_MODULE,
},
.remove = __exit_p(docg3_release),
};
static int __init docg3_init(void)
{
return platform_driver_probe(&g3_driver, docg3_probe);
}
module_init(docg3_init);
static void __exit docg3_exit(void)
{
platform_driver_unregister(&g3_driver);
}
module_exit(docg3_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Robert Jarzmik <robert.jarzmik@free.fr>");
MODULE_DESCRIPTION("MTD driver for DiskOnChip G3");
/*
* Handles the M-Systems DiskOnChip G3 chip
*
* Copyright (C) 2011 Robert Jarzmik
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#ifndef _MTD_DOCG3_H
#define _MTD_DOCG3_H
/*
* Flash memory areas :
* - 0x0000 .. 0x07ff : IPL
* - 0x0800 .. 0x0fff : Data area
* - 0x1000 .. 0x17ff : Registers
* - 0x1800 .. 0x1fff : Unknown
*/
#define DOC_IOSPACE_IPL 0x0000
#define DOC_IOSPACE_DATA 0x0800
#define DOC_IOSPACE_SIZE 0x2000
/*
* DOC G3 layout and adressing scheme
* A page address for the block "b", plane "P" and page "p":
* address = [bbbb bPpp pppp]
*/
#define DOC_ADDR_PAGE_MASK 0x3f
#define DOC_ADDR_BLOCK_SHIFT 6
#define DOC_LAYOUT_NBPLANES 2
#define DOC_LAYOUT_PAGES_PER_BLOCK 64
#define DOC_LAYOUT_PAGE_SIZE 512
#define DOC_LAYOUT_OOB_SIZE 16
#define DOC_LAYOUT_WEAR_SIZE 8
#define DOC_LAYOUT_PAGE_OOB_SIZE \
(DOC_LAYOUT_PAGE_SIZE + DOC_LAYOUT_OOB_SIZE)
#define DOC_LAYOUT_WEAR_OFFSET (DOC_LAYOUT_PAGE_OOB_SIZE * 2)
#define DOC_LAYOUT_BLOCK_SIZE \
(DOC_LAYOUT_PAGES_PER_BLOCK * DOC_LAYOUT_PAGE_SIZE)
#define DOC_ECC_BCH_SIZE 7
#define DOC_ECC_BCH_COVERED_BYTES \
(DOC_LAYOUT_PAGE_SIZE + DOC_LAYOUT_OOB_PAGEINFO_SZ + \
DOC_LAYOUT_OOB_HAMMING_SZ + DOC_LAYOUT_OOB_BCH_SZ)
/*
* Blocks distribution
*/
#define DOC_LAYOUT_BLOCK_BBT 0
#define DOC_LAYOUT_BLOCK_OTP 0
#define DOC_LAYOUT_BLOCK_FIRST_DATA 6
#define DOC_LAYOUT_PAGE_BBT 4
/*
* Extra page OOB (16 bytes wide) layout
*/
#define DOC_LAYOUT_OOB_PAGEINFO_OFS 0
#define DOC_LAYOUT_OOB_HAMMING_OFS 7
#define DOC_LAYOUT_OOB_BCH_OFS 8
#define DOC_LAYOUT_OOB_UNUSED_OFS 15
#define DOC_LAYOUT_OOB_PAGEINFO_SZ 7
#define DOC_LAYOUT_OOB_HAMMING_SZ 1
#define DOC_LAYOUT_OOB_BCH_SZ 7
#define DOC_LAYOUT_OOB_UNUSED_SZ 1
#define DOC_CHIPID_G3 0x200
#define DOC_ERASE_MARK 0xaa
/*
* Flash registers
*/
#define DOC_CHIPID 0x1000
#define DOC_TEST 0x1004
#define DOC_BUSLOCK 0x1006
#define DOC_ENDIANCONTROL 0x1008
#define DOC_DEVICESELECT 0x100a
#define DOC_ASICMODE 0x100c
#define DOC_CONFIGURATION 0x100e
#define DOC_INTERRUPTCONTROL 0x1010
#define DOC_READADDRESS 0x101a
#define DOC_DATAEND 0x101e
#define DOC_INTERRUPTSTATUS 0x1020
#define DOC_FLASHSEQUENCE 0x1032
#define DOC_FLASHCOMMAND 0x1034
#define DOC_FLASHADDRESS 0x1036
#define DOC_FLASHCONTROL 0x1038
#define DOC_NOP 0x103e
#define DOC_ECCCONF0 0x1040
#define DOC_ECCCONF1 0x1042
#define DOC_ECCPRESET 0x1044
#define DOC_HAMMINGPARITY 0x1046
#define DOC_BCH_SYNDROM(idx) (0x1048 + (idx << 1))
#define DOC_PROTECTION 0x1056
#define DOC_DPS0_ADDRLOW 0x1060
#define DOC_DPS0_ADDRHIGH 0x1062
#define DOC_DPS1_ADDRLOW 0x1064
#define DOC_DPS1_ADDRHIGH 0x1066
#define DOC_DPS0_STATUS 0x106c
#define DOC_DPS1_STATUS 0x106e
#define DOC_ASICMODECONFIRM 0x1072
#define DOC_CHIPID_INV 0x1074
/*
* Flash sequences
* A sequence is preset before one or more commands are input to the chip.
*/
#define DOC_SEQ_RESET 0x00
#define DOC_SEQ_PAGE_SIZE_532 0x03
#define DOC_SEQ_SET_MODE 0x09
#define DOC_SEQ_READ 0x12
#define DOC_SEQ_SET_PLANE1 0x0e
#define DOC_SEQ_SET_PLANE2 0x10
#define DOC_SEQ_PAGE_SETUP 0x1d
/*
* Flash commands
*/
#define DOC_CMD_READ_PLANE1 0x00
#define DOC_CMD_SET_ADDR_READ 0x05
#define DOC_CMD_READ_ALL_PLANES 0x30
#define DOC_CMD_READ_PLANE2 0x50
#define DOC_CMD_READ_FLASH 0xe0
#define DOC_CMD_PAGE_SIZE_532 0x3c
#define DOC_CMD_PROG_BLOCK_ADDR 0x60
#define DOC_CMD_PROG_CYCLE1 0x80
#define DOC_CMD_PROG_CYCLE2 0x10
#define DOC_CMD_ERASECYCLE2 0xd0
#define DOC_CMD_RELIABLE_MODE 0x22
#define DOC_CMD_FAST_MODE 0xa2
#define DOC_CMD_RESET 0xff
/*
* Flash register : DOC_FLASHCONTROL
*/
#define DOC_CTRL_VIOLATION 0x20
#define DOC_CTRL_CE 0x10
#define DOC_CTRL_UNKNOWN_BITS 0x08
#define DOC_CTRL_PROTECTION_ERROR 0x04
#define DOC_CTRL_SEQUENCE_ERROR 0x02
#define DOC_CTRL_FLASHREADY 0x01
/*
* Flash register : DOC_ASICMODE
*/
#define DOC_ASICMODE_RESET 0x00
#define DOC_ASICMODE_NORMAL 0x01
#define DOC_ASICMODE_POWERDOWN 0x02
#define DOC_ASICMODE_MDWREN 0x04
#define DOC_ASICMODE_BDETCT_RESET 0x08
#define DOC_ASICMODE_RSTIN_RESET 0x10
#define DOC_ASICMODE_RAM_WE 0x20
/*
* Flash register : DOC_ECCCONF0
*/
#define DOC_ECCCONF0_READ_MODE 0x8000
#define DOC_ECCCONF0_AUTO_ECC_ENABLE 0x4000
#define DOC_ECCCONF0_HAMMING_ENABLE 0x1000
#define DOC_ECCCONF0_BCH_ENABLE 0x0800
#define DOC_ECCCONF0_DATA_BYTES_MASK 0x07ff
/*
* Flash register : DOC_ECCCONF1
*/
#define DOC_ECCCONF1_BCH_SYNDROM_ERR 0x80
#define DOC_ECCCONF1_UNKOWN1 0x40
#define DOC_ECCCONF1_UNKOWN2 0x20
#define DOC_ECCCONF1_UNKOWN3 0x10
#define DOC_ECCCONF1_HAMMING_BITS_MASK 0x0f
/*
* Flash register : DOC_PROTECTION
*/
#define DOC_PROTECT_FOUNDRY_OTP_LOCK 0x01
#define DOC_PROTECT_CUSTOMER_OTP_LOCK 0x02
#define DOC_PROTECT_LOCK_INPUT 0x04
#define DOC_PROTECT_STICKY_LOCK 0x08
#define DOC_PROTECT_PROTECTION_ENABLED 0x10
#define DOC_PROTECT_IPL_DOWNLOAD_LOCK 0x20
#define DOC_PROTECT_PROTECTION_ERROR 0x80
/*
* Flash register : DOC_DPS0_STATUS and DOC_DPS1_STATUS
*/
#define DOC_DPS_OTP_PROTECTED 0x01
#define DOC_DPS_READ_PROTECTED 0x02
#define DOC_DPS_WRITE_PROTECTED 0x04
#define DOC_DPS_HW_LOCK_ENABLED 0x08
#define DOC_DPS_KEY_OK 0x80
/*
* Flash register : DOC_CONFIGURATION
*/
#define DOC_CONF_IF_CFG 0x80
#define DOC_CONF_MAX_ID_MASK 0x30
#define DOC_CONF_VCCQ_3V 0x01
/*
* Flash register : DOC_READADDRESS
*/
#define DOC_READADDR_INC 0x8000
#define DOC_READADDR_ONE_BYTE 0x4000
#define DOC_READADDR_ADDR_MASK 0x1fff
/**
* struct docg3 - DiskOnChip driver private data
* @dev: the device currently under control
* @base: mapped IO space
* @device_id: number of the cascaded DoCG3 device (0, 1, 2 or 3)
* @if_cfg: if true, reads are on 16bits, else reads are on 8bits
* @bbt: bad block table cache
* @debugfs_root: debugfs root node
*/
struct docg3 {
struct device *dev;
void __iomem *base;
unsigned int device_id:4;
unsigned int if_cfg:1;
int max_block;
u8 *bbt;
struct dentry *debugfs_root;
};
#define doc_err(fmt, arg...) dev_err(docg3->dev, (fmt), ## arg)
#define doc_info(fmt, arg...) dev_info(docg3->dev, (fmt), ## arg)
#define doc_dbg(fmt, arg...) dev_dbg(docg3->dev, (fmt), ## arg)
#define doc_vdbg(fmt, arg...) dev_vdbg(docg3->dev, (fmt), ## arg)
#define DEBUGFS_RO_ATTR(name, show_fct) \
static int name##_open(struct inode *inode, struct file *file) \
{ return single_open(file, show_fct, inode->i_private); } \
static const struct file_operations name##_fops = { \
.owner = THIS_MODULE, \
.open = name##_open, \
.llseek = seq_lseek, \
.read = seq_read, \
.release = single_release \
};
#endif
/*
* Trace events part
*/
#undef TRACE_SYSTEM
#define TRACE_SYSTEM docg3
#if !defined(_MTD_DOCG3_TRACE) || defined(TRACE_HEADER_MULTI_READ)
#define _MTD_DOCG3_TRACE
#include <linux/tracepoint.h>
TRACE_EVENT(docg3_io,
TP_PROTO(int op, int width, u16 reg, int val),
TP_ARGS(op, width, reg, val),
TP_STRUCT__entry(
__field(int, op)
__field(unsigned char, width)
__field(u16, reg)
__field(int, val)),
TP_fast_assign(
__entry->op = op;
__entry->width = width;
__entry->reg = reg;
__entry->val = val;),
TP_printk("docg3: %s%02d reg=%04x, val=%04x",
__entry->op ? "write" : "read", __entry->width,
__entry->reg, __entry->val)
);
#endif
/* This part must be outside protection */
#undef TRACE_INCLUDE_PATH
#undef TRACE_INCLUDE_FILE
#define TRACE_INCLUDE_PATH .
#define TRACE_INCLUDE_FILE docg3
#include <trace/define_trace.h>
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