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android_kernel_cmhtcleo/drivers/mtd/devices/htcleo_nand.c

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/* drivers/mtd/devices/htcleo-nand.c
*
* Copyright (C) 2007 Google, Inc.
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* 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.
*
*/
// WARNING: This driver is designed for HTC LEO (HD2) only.
// Changed numbers to match Leo flash layout
// Yaffs2 reading and writing with MTD_OOB_AUTO works
// -Cotulla
// Added MTD_OOB_PLACE access to spare, removed most magic constants
// YAFFS2 should not pass improper oob len anymore (fix in yaffs_mtdif2.c)
// Added missing capabilities for userland mtd interaction (multi-page, data/oob only program)
// -Rajko
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/platform_device.h>
#include <linux/sched.h>
#include <linux/dma-mapping.h>
#include <linux/io.h>
#include <linux/moduleparam.h>
#include <linux/stat.h>
#include <linux/slab.h>
#include <asm/dma.h>
#include <asm/mach/flash.h>
#include <mach/dma.h>
unsigned crci_mask;
#if defined(CONFIG_ARCH_MSM7X30)
#define MSM_NAND_BASE 0xA0200000
#else
#define MSM_NAND_BASE 0xA0A00000
#endif
#include "msm_nand.h"
#define MSM_NAND_DMA_BUFFER_SIZE SZ_4K
#define MSM_NAND_DMA_BUFFER_SLOTS \
(MSM_NAND_DMA_BUFFER_SIZE / (sizeof(((atomic_t *)0)->counter) * 8))
#define MSM_NAND_CFG0_RAW 0xA80420C0
#define MSM_NAND_CFG1_RAW 0x5045D
#define SUPPORT_WRONG_ECC_CONFIG 0
#define IGNORE_ARM9_CONFIG 0
#define VERBOSE 0
//#define ENABLE_FLASH_RW_DUMP
//#define ENABLE_ENTRY_TRACE
static struct nand_hw_info *nand_info;
struct nand_hw_info {
uint32_t flash_id;
uint8_t maker_id;
uint8_t maker_name[10];
uint8_t width;
uint32_t size;
uint32_t block_count;
uint32_t page_count;
uint32_t page_size;
};
struct msm_nand_chip {
struct device *dev;
wait_queue_head_t wait_queue;
atomic_t dma_buffer_busy;
unsigned dma_channel;
uint8_t *dma_buffer;
dma_addr_t dma_addr;
unsigned CFG0, CFG1;
#if SUPPORT_WRONG_ECC_CONFIG
uint32_t ecc_buf_cfg;
uint32_t saved_ecc_buf_cfg;
#endif
struct nand_hw_info dev_info;
};
#define CFG1_WIDE_FLASH (1U << 1)
/* TODO: move datamover code out */
#define SRC_CRCI_NAND_CMD CMD_SRC_CRCI(DMOV_NAND_CRCI_CMD)
#define DST_CRCI_NAND_CMD CMD_DST_CRCI(DMOV_NAND_CRCI_CMD)
#define SRC_CRCI_NAND_DATA CMD_SRC_CRCI(DMOV_NAND_CRCI_DATA)
#define DST_CRCI_NAND_DATA CMD_DST_CRCI(DMOV_NAND_CRCI_DATA)
#define msm_virt_to_dma(chip, vaddr) \
((void)(*(vaddr)), (chip)->dma_addr + \
((uint8_t *)(vaddr) - (chip)->dma_buffer))
/**
* msm_nand_oob_64 - oob info for 2KB page
*/
// Rajko - proper table resembling the layout used now, used in some internal calculations
// outside of this file, only the oobavail and oobfree parts are used
static struct nand_ecclayout msm_nand_oob_64 =
{
.eccbytes = 40,
.eccpos =
{
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, // 10, 11, 12, 13, // 14, 15, // ecc, oob, bbf (inaccessible)
16, 17, 18, 19, 20, 21, 22, 23, 24, 25, // 26, 27, 28, 29, // 30, 31, // ecc, oob, bbf (inaccessible)
32, 33, 34, 35, 36, 37, 38, 39, 40, 41, // 42, 43, 44, 45, // 46, 47, // ecc, oob, bbf (inaccessible)
48, 49, 50, 51, 52, 53, 54, 55, 56, 57, // 58, 59, 60, 61, // 62, 63, // ecc, oob, bbf (inaccessible)
},
.oobavail = 16,
.oobfree =
{
{10, 4},
{26, 4},
{42, 4},
{58, 4},
}
};
#define NUM_PROTECTED_BLOCKS (0x212)
struct flash_identification {
uint32_t flash_id;
uint32_t mask;
uint32_t density;
uint32_t widebus;
uint32_t pagesize;
uint32_t blksize;
uint32_t oobsize;
};
static struct flash_identification supported_flash[] =
{
/* Flash ID ID Mask Density(MB) Wid Pgsz Blksz oobsz Manuf */
{0x00000000, 0xFFFFFFFF, 0, 0, 0, 0, 0, }, /*ONFI*/
{0x1500aaec, 0xFF00FFFF, (256<<20), 0, 2048, (2048<<6), 64, }, /*Samsung 2Gbit*/
{0x5500baec, 0xFF00FFFF, (256<<20), 1, 2048, (2048<<6), 64, }, /*Samsung 2Gbit*/
{0x6600bcec, 0xFF00FFFF, (512<<20), 1, 4096, (4096<<6), 128,}, /*Samsung 4Gbit 4K Page*/
{0x0000aaec, 0x0000FFFF, (256<<20), 1, 2048, (2048<<6), 64, }, /*Samsung 2Gbit*/
{0x0000acec, 0x0000FFFF, (512<<20), 1, 2048, (2048<<6), 64, }, /*Samsung 4Gbit*/
{0x0000bcec, 0x0000FFFF, (512<<20), 1, 2048, (2048<<6), 64, }, /*Samsung 4Gbit*/
{0x6601b3ec, 0xFFFFFFFF, (1024<<20),1, 4096, (4096<<6), 128,}, /*Samsung 8Gbit 4Kpage*/
{0x0000b3ec, 0x0000FFFF, (1024<<20),1, 2048, (2048<<6), 64, }, /*Samsung 8Gbit*/
{0x1500aa98, 0xFFFFFFFF, (256<<20), 0, 2048, (2048<<6), 64, }, /*Toshiba 2Gbit*/
{0x5500ba98, 0xFFFFFFFF, (256<<20), 1, 2048, (2048<<6), 64, }, /*Toshiba 2Gbit*/
{0xd580b12c, 0xFFFFFFFF, (128<<20), 1, 2048, (2048<<6), 64, }, /*Micron 1Gbit*/
{0x0000ba2c, 0x0000FFFF, (256<<20), 1, 2048, (2048<<6), 64, }, /*Micron 2Gbit*/
{0x0000bc2c, 0x0000FFFF, (512<<20), 1, 2048, (2048<<6), 64, }, /*Micron 4Gbit*/
{0x0000b32c, 0x0000FFFF, (1024<<20),1, 2048, (2048<<6), 64, }, /*Micron 8Gbit*/
{0x0000baad, 0x0000FFFF, (256<<20), 1, 2048, (2048<<6), 64, }, /*Hynix 2Gbit*/
{0x0000bcad, 0x0000FFFF, (512<<20), 1, 2048, (2048<<6), 64, }, /*Hynix 4Gbit*/
{0x0000b3ad, 0x0000FFFF, (1024<<20),1, 2048, (2048<<6), 64, }, /*Hynix 8Gbit*/
/* Note: Width flag is 0 for 8 bit Flash and 1 for 16 bit flash */
/* Note: The First row will be filled at runtime during ONFI probe */
};
static void *msm_nand_get_dma_buffer(struct msm_nand_chip *chip, size_t size)
{
unsigned int bitmask, free_bitmask, old_bitmask;
unsigned int need_mask, current_need_mask;
int free_index;
need_mask = (1UL << DIV_ROUND_UP(size, MSM_NAND_DMA_BUFFER_SLOTS)) - 1;
bitmask = atomic_read(&chip->dma_buffer_busy);
free_bitmask = ~bitmask;
do {
free_index = __ffs(free_bitmask);
current_need_mask = need_mask << free_index;
if (size + free_index * MSM_NAND_DMA_BUFFER_SLOTS >=
MSM_NAND_DMA_BUFFER_SIZE)
return NULL;
if ((bitmask & current_need_mask) == 0) {
old_bitmask =
atomic_cmpxchg(&chip->dma_buffer_busy,
bitmask,
bitmask | current_need_mask);
if (old_bitmask == bitmask)
return chip->dma_buffer +
free_index * MSM_NAND_DMA_BUFFER_SLOTS;
free_bitmask = 0; /* force return */
}
/* current free range was too small, clear all free bits */
/* below the top busy bit within current_need_mask */
free_bitmask &=
~(~0U >> (32 - fls(bitmask & current_need_mask)));
} while (free_bitmask);
return NULL;
}
static void msm_nand_release_dma_buffer(struct msm_nand_chip *chip,
void *buffer, size_t size)
{
int index;
unsigned int used_mask;
used_mask = (1UL << DIV_ROUND_UP(size, MSM_NAND_DMA_BUFFER_SLOTS)) - 1;
index = ((uint8_t *)buffer - chip->dma_buffer) /
MSM_NAND_DMA_BUFFER_SLOTS;
atomic_sub(used_mask << index, &chip->dma_buffer_busy);
wake_up(&chip->wait_queue);
}
uint32_t flash_read_id(struct msm_nand_chip *chip)
{
struct {
dmov_s cmd[5];
unsigned cmdptr;
unsigned data[5];
} *dma_buffer;
uint32_t rv;
wait_event(chip->wait_queue,
(dma_buffer = msm_nand_get_dma_buffer(
chip, sizeof(*dma_buffer))));
dma_buffer->data[0] = 0 | 4;
dma_buffer->data[1] = MSM_NAND_CMD_FETCH_ID;
dma_buffer->data[2] = 1;
dma_buffer->data[3] = 0xeeeeeeee;
dma_buffer->data[4] = 0xeeeeeeee;
BUILD_BUG_ON(4 != ARRAY_SIZE(dma_buffer->data) - 1);
dma_buffer->cmd[0].cmd = 0 | CMD_OCB;
dma_buffer->cmd[0].src = msm_virt_to_dma(chip, &dma_buffer->data[0]);
dma_buffer->cmd[0].dst = MSM_NAND_FLASH_CHIP_SELECT;
dma_buffer->cmd[0].len = 4;
dma_buffer->cmd[1].cmd = DST_CRCI_NAND_CMD;
dma_buffer->cmd[1].src = msm_virt_to_dma(chip, &dma_buffer->data[1]);
dma_buffer->cmd[1].dst = MSM_NAND_FLASH_CMD;
dma_buffer->cmd[1].len = 4;
dma_buffer->cmd[2].cmd = 0;
dma_buffer->cmd[2].src = msm_virt_to_dma(chip, &dma_buffer->data[2]);
dma_buffer->cmd[2].dst = MSM_NAND_EXEC_CMD;
dma_buffer->cmd[2].len = 4;
dma_buffer->cmd[3].cmd = SRC_CRCI_NAND_DATA;
dma_buffer->cmd[3].src = MSM_NAND_FLASH_STATUS;
dma_buffer->cmd[3].dst = msm_virt_to_dma(chip, &dma_buffer->data[3]);
dma_buffer->cmd[3].len = 4;
dma_buffer->cmd[4].cmd = CMD_OCU | CMD_LC;
dma_buffer->cmd[4].src = MSM_NAND_READ_ID;
dma_buffer->cmd[4].dst = msm_virt_to_dma(chip, &dma_buffer->data[4]);
dma_buffer->cmd[4].len = 4;
BUILD_BUG_ON(4 != ARRAY_SIZE(dma_buffer->cmd) - 1);
dma_buffer->cmdptr =
(msm_virt_to_dma(chip, dma_buffer->cmd) >> 3) | CMD_PTR_LP;
dsb();
msm_dmov_exec_cmd(
chip->dma_channel, crci_mask, DMOV_CMD_PTR_LIST |
DMOV_CMD_ADDR(msm_virt_to_dma(chip, &dma_buffer->cmdptr)));
dsb();
pr_info("status: %x\n", dma_buffer->data[3]);
pr_info("nandid: %x maker %02x device %02x\n",
dma_buffer->data[4], dma_buffer->data[4] & 0xff,
(dma_buffer->data[4] >> 8) & 0xff);
rv = dma_buffer->data[4];
msm_nand_release_dma_buffer(chip, dma_buffer, sizeof(*dma_buffer));
return rv;
}
int flash_read_config(struct msm_nand_chip *chip)
{
struct {
dmov_s cmd[2];
unsigned cmdptr;
unsigned cfg0;
unsigned cfg1;
} *dma_buffer;
wait_event(chip->wait_queue,
(dma_buffer = msm_nand_get_dma_buffer(
chip, sizeof(*dma_buffer))));
dma_buffer->cfg0 = 0;
dma_buffer->cfg1 = 0;
dma_buffer->cmd[0].cmd = CMD_OCB;
dma_buffer->cmd[0].src = MSM_NAND_DEV0_CFG0;
dma_buffer->cmd[0].dst = msm_virt_to_dma(chip, &dma_buffer->cfg0);
dma_buffer->cmd[0].len = 4;
dma_buffer->cmd[1].cmd = CMD_OCU | CMD_LC;
dma_buffer->cmd[1].src = MSM_NAND_DEV0_CFG1;
dma_buffer->cmd[1].dst = msm_virt_to_dma(chip, &dma_buffer->cfg1);
dma_buffer->cmd[1].len = 4;
BUILD_BUG_ON(1 != ARRAY_SIZE(dma_buffer->cmd) - 1);
dma_buffer->cmdptr =
(msm_virt_to_dma(chip, dma_buffer->cmd) >> 3) | CMD_PTR_LP;
dsb();
msm_dmov_exec_cmd(
chip->dma_channel, crci_mask, DMOV_CMD_PTR_LIST |
DMOV_CMD_ADDR(msm_virt_to_dma(chip, &dma_buffer->cmdptr)));
dsb();
chip->CFG0 = dma_buffer->cfg0;
chip->CFG1 = dma_buffer->cfg1;
pr_info("msm_nand: read CFG0 = %x, CFG1 = %x\n", chip->CFG0, chip->CFG1);
msm_nand_release_dma_buffer(chip, dma_buffer, sizeof(*dma_buffer));
if ((chip->CFG0 == 0) || (chip->CFG1 == 0))
return -1;
return 0;
}
unsigned flash_rd_reg(struct msm_nand_chip *chip, unsigned addr)
{
struct {
dmov_s cmd;
unsigned cmdptr;
unsigned data;
} *dma_buffer;
unsigned rv;
wait_event(chip->wait_queue,
(dma_buffer = msm_nand_get_dma_buffer(
chip, sizeof(*dma_buffer))));
dma_buffer->cmd.cmd = CMD_LC;
dma_buffer->cmd.src = addr;
dma_buffer->cmd.dst = msm_virt_to_dma(chip, &dma_buffer->data);
dma_buffer->cmd.len = 4;
dma_buffer->cmdptr =
(msm_virt_to_dma(chip, &dma_buffer->cmd) >> 3) | CMD_PTR_LP;
dma_buffer->data = 0xeeeeeeee;
dsb();
msm_dmov_exec_cmd(
chip->dma_channel, crci_mask, DMOV_CMD_PTR_LIST |
DMOV_CMD_ADDR(msm_virt_to_dma(chip, &dma_buffer->cmdptr)));
dsb();
rv = dma_buffer->data;
msm_nand_release_dma_buffer(chip, dma_buffer, sizeof(*dma_buffer));
return rv;
}
void flash_wr_reg(struct msm_nand_chip *chip, unsigned addr, unsigned val)
{
struct {
dmov_s cmd;
unsigned cmdptr;
unsigned data;
} *dma_buffer;
wait_event(chip->wait_queue,
(dma_buffer = msm_nand_get_dma_buffer(
chip, sizeof(*dma_buffer))));
dma_buffer->cmd.cmd = CMD_LC;
dma_buffer->cmd.src = msm_virt_to_dma(chip, &dma_buffer->data);
dma_buffer->cmd.dst = addr;
dma_buffer->cmd.len = 4;
dma_buffer->cmdptr =
(msm_virt_to_dma(chip, &dma_buffer->cmd) >> 3) | CMD_PTR_LP;
dma_buffer->data = val;
dsb();
msm_dmov_exec_cmd(
chip->dma_channel, crci_mask, DMOV_CMD_PTR_LIST |
DMOV_CMD_ADDR(msm_virt_to_dma(chip, &dma_buffer->cmdptr)));
dsb();
msm_nand_release_dma_buffer(chip, dma_buffer, sizeof(*dma_buffer));
}
static dma_addr_t
msm_nand_dma_map(struct device *dev, void *addr, size_t size,
enum dma_data_direction dir)
{
struct page *page;
unsigned long offset = (unsigned long)addr & ~PAGE_MASK;
if (virt_addr_valid(addr))
page = virt_to_page(addr);
else {
if (WARN_ON(size + offset > PAGE_SIZE))
return ~0;
page = vmalloc_to_page(addr);
}
return dma_map_page(dev, page, offset, size, dir);
}
static int msm_nand_read_oob(struct mtd_info *mtd, loff_t from, struct mtd_oob_ops *ops)
{
struct msm_nand_chip *chip = mtd->priv;
struct
{
dmov_s cmd[8 * 5 + 3];
unsigned cmdptr;
struct {
uint32_t cmd;
uint32_t addr0;
uint32_t addr1;
uint32_t chipsel;
uint32_t cfg0;
uint32_t cfg1;
uint32_t exec;
#if SUPPORT_WRONG_ECC_CONFIG
uint32_t ecccfg;
uint32_t ecccfg_restore;
#endif
struct {
uint32_t flash_status;
uint32_t buffer_status;
} result[8];
} data;
} *dma_buffer;
dmov_s *cmd;
unsigned n;
unsigned page = 0;
uint32_t cwdatasize;
uint32_t cwoobsize;
int err, pageerr, rawerr;
dma_addr_t data_dma_addr = 0;
dma_addr_t oob_dma_addr = 0;
dma_addr_t data_dma_addr_curr = 0;
dma_addr_t oob_dma_addr_curr = 0;
uint32_t oob_col = 0;
unsigned page_count;
unsigned pages_read = 0;
unsigned start_sector = 0;
uint32_t ecc_errors;
uint32_t total_ecc_errors = 0;
unsigned cwperpage;
unsigned ooboffs;
unsigned page_oob_count=0;
unsigned page_oob_done;
uint32_t oob_count=0;
uint32_t oob_done_size=0;
uint32_t data_count=0; //number of bytes mapped into dma
int readdata=0;
int readoob=0;
uint32_t readcmd;
#ifdef ENABLE_ENTRY_TRACE
char* oobType = "MTD_OOB_RAW";
printk("+&&&nand_readoob&&&\n");
#endif
if (mtd->writesize == 2048)
page = from >> 11;
if (mtd->writesize == 4096)
page = from >> 12;
cwperpage = (mtd->writesize >> 9);
cwdatasize = mtd->writesize/cwperpage;
if (ops->mode == MTD_OOB_AUTO)
{
cwoobsize = mtd->oobavail/cwperpage;
ooboffs=cwdatasize + (mtd->ecclayout->eccbytes/cwperpage); //after data and ecc
}
else
{
cwoobsize = (mtd->oobsize/cwperpage) - 2; //dont read 2 inaccessible bbf bytes
ooboffs=cwdatasize; //after data
}
if (from & (mtd->writesize - 1))
{
pr_err("%s: unsupported from, 0x%llx\n", __func__, from);
return -EINVAL;
}
if (ops->datbuf != NULL && (ops->len % mtd->writesize) != 0)
{
/* when ops->datbuf is NULL, ops->len may refer to ooblen */
pr_err("%s: unsupported ops->len, %d\n", __func__, ops->len);
return -EINVAL;
}
if (ops->datbuf && ops->len > 0)
readdata=1;
if (ops->oobbuf)
{
if (ops->ooblen > 0)
{
oob_count = ops->ooblen;
readoob=1;
}
else if (!readdata && ops->len > 0)
{
oob_count = ops->len;
readoob=1;
}
}
if (!readdata && !readoob)
{
pr_err("%s: nothing to do\n", __func__);
return -EINVAL;
}
if (readoob && ops->ooboffs != 0)
{
pr_err("%s: unsupported ops->ooboffs, %d\n", __func__, ops->ooboffs);
return -EINVAL;
}
#ifdef ENABLE_ENTRY_TRACE
if (ops->mode == MTD_OOB_AUTO)
oobType = "MTD_OOB_AUTO";
else if (ops->mode == MTD_OOB_PLACE)
oobType = "MTD_OOB_PLACE";
printk("msm_nand_read_oob [%08X %08X] %08X %08X %d %s\n",
(uint32_t)(from), (uint32_t)ops->len, (uint32_t)ops->datbuf,
(uint32_t)ops->oobbuf, oob_count, readoob?oobType:"OOB_NONE");
#endif
if (readoob)
readcmd=MSM_NAND_CMD_PAGE_READ_ALL;
else
readcmd=MSM_NAND_CMD_PAGE_READ;
if (readoob && !readdata)
{
uint32_t maxpageoob;
if (ops->mode == MTD_OOB_AUTO)
maxpageoob=mtd->oobavail;
else
maxpageoob=mtd->oobsize;
page_count = oob_count/maxpageoob;
if (oob_count%maxpageoob != 0)
{
//assume caller wants to read only one page's oob
page_oob_count=oob_count;
page_count=1;
}
else
{
page_oob_count = maxpageoob;
}
}
else
{
page_count = ops->len / mtd->writesize;
if (oob_count%page_count != 0)
{
pr_err("%s: OOB num pages != DATA num pages oob_count=%d\n", __func__, oob_count);
return -EINVAL;
}
page_oob_count = oob_count/page_count;
}
#if VERBOSE
printk("msm_nand_read_oob ops->len=%d oob_count=%d page_count=%d page_oob_count=%d\n", ops->len, oob_count, page_count, page_oob_count);
#endif
if (readdata)
{
/* memset(ops->datbuf, 0x55, ops->len); */
data_dma_addr_curr = data_dma_addr = msm_nand_dma_map(chip->dev, ops->datbuf, ops->len, DMA_FROM_DEVICE);
data_count = ops->len; //initially map whole buf to dma
if (dma_mapping_error(chip->dev, data_dma_addr))
{
pr_err("msm_nand_read_oob: failed to get dma addr for %p\n", ops->datbuf);
return -EIO;
}
}
if (readoob)
{
memset(ops->oobbuf, 0xff, oob_count);
oob_dma_addr_curr = oob_dma_addr = msm_nand_dma_map(chip->dev, ops->oobbuf, oob_count, DMA_BIDIRECTIONAL);
if (dma_mapping_error(chip->dev, oob_dma_addr))
{
pr_err("msm_nand_read_oob: failed to get dma addr for %p\n", ops->oobbuf);
err = -EIO;
goto err_dma_map_oobbuf_failed;
}
}
wait_event(chip->wait_queue, (dma_buffer = msm_nand_get_dma_buffer(chip, sizeof(*dma_buffer))));
if (readoob)
{
oob_col = start_sector * (512+16);
if (chip->CFG1 & CFG1_WIDE_FLASH)
oob_col >>= 1;
}
#if VERBOSE
printk("msm_nand_read_oob start_sector=%d oob_col=%d ooboffs=%d\n", start_sector, oob_col, ooboffs);
#endif
err = 0;
while (page_count-- > 0)
{
page_oob_done=0;
cmd = dma_buffer->cmd;
/* CMD / ADDR0 / ADDR1 / CHIPSEL program values */
dma_buffer->data.cmd = readcmd;
dma_buffer->data.addr0 = (page << 16) | oob_col;
/* qc example is (page >> 16) && 0xff !? */
dma_buffer->data.addr1 = (page >> 16) & 0xff;
/* flash0 + undoc bit */
dma_buffer->data.chipsel = 0 | 4;
dma_buffer->data.cfg0 = (chip->CFG0 & ~(7U << 6)) | (((cwperpage-1) - start_sector) << 6);
dma_buffer->data.cfg1 = chip->CFG1;
/* GO bit for the EXEC register */
dma_buffer->data.exec = 1;
BUILD_BUG_ON(8 != ARRAY_SIZE(dma_buffer->data.result));
for (n = start_sector; n < cwperpage; n++)
{
/* flash + buffer status return words */
dma_buffer->data.result[n].flash_status = 0xeeeeeeee;
dma_buffer->data.result[n].buffer_status = 0xeeeeeeee;
/* block on cmd ready, then
* write CMD / ADDR0 / ADDR1 / CHIPSEL
* regs in a burst
*/
cmd->cmd = DST_CRCI_NAND_CMD;
cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.cmd);
cmd->dst = MSM_NAND_FLASH_CMD;
if (n == start_sector)
cmd->len = 16;
else
cmd->len = 4;
cmd++;
if (n == start_sector)
{
cmd->cmd = 0;
cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.cfg0);
cmd->dst = MSM_NAND_DEV0_CFG0;
cmd->len = 8;
cmd++;
#if SUPPORT_WRONG_ECC_CONFIG
if (chip->saved_ecc_buf_cfg != chip->ecc_buf_cfg)
{
dma_buffer->data.ecccfg = chip->ecc_buf_cfg;
cmd->cmd = 0;
cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.ecccfg);
cmd->dst = MSM_NAND_EBI2_ECC_BUF_CFG;
cmd->len = 4;
cmd++;
}
#endif
}
/* kick the execute register */
cmd->cmd = 0;
cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.exec);
cmd->dst = MSM_NAND_EXEC_CMD;
cmd->len = 4;
cmd++;
/* block on data ready, then
* read the status register
*/
cmd->cmd = SRC_CRCI_NAND_DATA;
cmd->src = MSM_NAND_FLASH_STATUS;
cmd->dst = msm_virt_to_dma(chip, &dma_buffer->data.result[n]);
/* MSM_NAND_FLASH_STATUS + MSM_NAND_BUFFER_STATUS */
cmd->len = 8;
cmd++;
/* read data block
* (only valid if status says success)
*/
if (readdata)
{
cmd->cmd = 0;
cmd->src = MSM_NAND_FLASH_BUFFER;
cmd->dst = data_dma_addr_curr;
data_dma_addr_curr += cwdatasize;
cmd->len = cwdatasize;
cmd++;
}
if (readoob && page_oob_done < page_oob_count)
{
cmd->cmd = 0;
cmd->src = MSM_NAND_FLASH_BUFFER + ooboffs;
cmd->dst = oob_dma_addr_curr;
if (cwoobsize < (page_oob_count-page_oob_done) )
cmd->len = cwoobsize;
else
cmd->len = page_oob_count-page_oob_done;
#if VERBOSE
printk("msm_nand_read_oob oob_dma_addr_curr=%08x cwoobsize=%d page_oob_done=%d page_oob_count=%d\n",
(uint32_t)oob_dma_addr_curr,cwoobsize,page_oob_done,page_oob_count);
#endif
oob_dma_addr_curr += cmd->len;
page_oob_done += cmd->len;
if (ops->mode != MTD_OOB_AUTO) //seek over 2 skipped bytes in output
{
int maxinc=page_oob_count-page_oob_done;
if (maxinc>2)
maxinc=2;
oob_dma_addr_curr += maxinc;
page_oob_done += maxinc;
}
if (cmd->len > 0)
cmd++;
}
}
#if SUPPORT_WRONG_ECC_CONFIG
if (chip->saved_ecc_buf_cfg != chip->ecc_buf_cfg)
{
dma_buffer->data.ecccfg_restore = chip->saved_ecc_buf_cfg;
cmd->cmd = 0;
cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.ecccfg_restore);
cmd->dst = MSM_NAND_EBI2_ECC_BUF_CFG;
cmd->len = 4;
cmd++;
}
#endif
BUILD_BUG_ON(8 * 5 + 3 != ARRAY_SIZE(dma_buffer->cmd));
BUG_ON(cmd - dma_buffer->cmd > ARRAY_SIZE(dma_buffer->cmd));
dma_buffer->cmd[0].cmd |= CMD_OCB;
cmd[-1].cmd |= CMD_OCU | CMD_LC;
dma_buffer->cmdptr = (msm_virt_to_dma(chip, dma_buffer->cmd) >> 3) | CMD_PTR_LP;
dsb();
msm_dmov_exec_cmd(
chip->dma_channel, crci_mask, DMOV_CMD_PTR_LIST | DMOV_CMD_ADDR(
msm_virt_to_dma(chip, &dma_buffer->cmdptr)));
dsb();
/* if any of the writes failed (0x10), or there
* was a protection violation (0x100), we lose
*/
pageerr = rawerr = 0;
for (n = start_sector; n < cwperpage; n++)
{
if (dma_buffer->data.result[n].flash_status & 0x110)
{
#if VERBOSE
printk("msm_nand_read_oob we lose at n=%d\n", n);
#endif
rawerr = -EIO;
break;
}
}
if (rawerr)
{
if (readdata)
{
uint8_t *datbuf = ops->datbuf + pages_read * mtd->writesize;
uint32_t data_done = data_dma_addr_curr-data_dma_addr;
#if VERBOSE
printk("msm_nand_read_oob dma_unmap_page %08x\n", (uint32_t)data_dma_addr_curr);
#endif
dma_unmap_page(chip->dev, data_dma_addr, data_count, DMA_FROM_DEVICE);
data_count -= data_done; // we wont be mapping the already transferred bytes to avoid corruption
//data now ready to be read by cpu
for (n = 0; n < mtd->writesize; n++)
{
if ((n % 512) == 0xF3 && datbuf[n] == 0x76)
{
datbuf[n] = 0xff;
}
if (datbuf[n] != 0xff)
{
pageerr = rawerr;
#if VERBOSE
printk("msm_nand_read_oob data pageerr=rawerr at n=%d\n", n);
#endif
break;
}
}
//remap dma if there's still data to be read
if (data_count > 0)
{
int offset = ops->len-data_count;
#if VERBOSE
printk("msm_nand_read_oob dma_map_page offset=%d length=%d\n", offset, data_count);
#endif
data_dma_addr = msm_nand_dma_map(chip->dev, ops->datbuf+offset, data_count, DMA_FROM_DEVICE);
data_dma_addr_curr = data_dma_addr;
if (dma_mapping_error(chip->dev, data_dma_addr)) {
pr_err("msm_nand_read_oob: failed to re-get dma addr "
"for %p+%d initial_size=%d remaining_size=%d\n", ops->datbuf, offset, ops->len, data_count);
return -EIO;
}
}
else
{
data_dma_addr_curr = data_dma_addr = 0;
}
}
if (readoob && oob_done_size < oob_count)
{
//no sync needed for BIDIR dma buffers
uint8_t *pageoobbuf = ops->oobbuf + oob_done_size;
for (n = 0; n < page_oob_done; n++)
{
if (pageoobbuf[n] != 0xff)
{
pageerr = rawerr;
#if VERBOSE
printk("msm_nand_read_oob oob pageerr=rawerr at n=%d\n", n);
#endif
break;
}
}
}
}
if (pageerr)
{
for (n = start_sector; n < cwperpage; n++)
{
if (dma_buffer->data.result[n].buffer_status & 0x8)
{
#if VERBOSE
printk("msm_nand_read_oob oob pageerr ecc uncorrectable at n=%d\n", n);
#endif
/* not thread safe */
mtd->ecc_stats.failed++;
pageerr = -EBADMSG;
break;
}
}
}
if (!rawerr)
{
/* check for correctable errors */
for (n = start_sector; n < cwperpage; n++)
{
ecc_errors = dma_buffer->data.result[n].buffer_status & 0x7;
if (ecc_errors)
{
#if VERBOSE
printk("msm_nand_read_oob oob pageerr ecc correctable n=%d ecc_errors=%d\n", n, ecc_errors);
#endif
total_ecc_errors += ecc_errors;
/* not thread safe */
mtd->ecc_stats.corrected += ecc_errors;
if (ecc_errors > 1)
pageerr = -EUCLEAN;
}
}
}
if (pageerr && (pageerr != -EUCLEAN || err == 0))
err = pageerr;
#if VERBOSE
if (rawerr && !pageerr)
{
pr_err("msm_nand_read_oob %llx %x %x empty page\n", (loff_t)page * mtd->writesize, ops->len, oob_count);
}
else
{
pr_info("msm_nand_read_oob error status: %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x \n",
dma_buffer->data.result[0].flash_status,
dma_buffer->data.result[0].buffer_status,
dma_buffer->data.result[1].flash_status,
dma_buffer->data.result[1].buffer_status,
dma_buffer->data.result[2].flash_status,
dma_buffer->data.result[2].buffer_status,
dma_buffer->data.result[3].flash_status,
dma_buffer->data.result[3].buffer_status,
dma_buffer->data.result[4].flash_status,
dma_buffer->data.result[4].buffer_status,
dma_buffer->data.result[5].flash_status,
dma_buffer->data.result[5].buffer_status,
dma_buffer->data.result[6].flash_status,
dma_buffer->data.result[6].buffer_status,
dma_buffer->data.result[7].flash_status,
dma_buffer->data.result[7].buffer_status);
}
#endif
if (err && err != -EUCLEAN && err != -EBADMSG)
break;
if (page_oob_done < page_oob_count) //we didnt have enough oob bytes to fill their per page oob size (yaffs hack)
{
#if VERBOSE
printk("msm_nand_read_oob: couldn't provide %d out of %d oob bytes, oob_done_size=%d\n",
page_oob_count-page_oob_done, page_oob_count, oob_done_size);
#endif
//just seek the outbuf for the bytes we couldnt fill
oob_dma_addr_curr+= page_oob_count-page_oob_done;
page_oob_done=page_oob_count; //all done now
}
oob_done_size += page_oob_done;
pages_read++;
page++;
}
msm_nand_release_dma_buffer(chip, dma_buffer, sizeof(*dma_buffer));
if (readoob)
dma_unmap_page(chip->dev, oob_dma_addr, oob_count, DMA_BIDIRECTIONAL);
err_dma_map_oobbuf_failed:
if (readdata && data_dma_addr != 0)
dma_unmap_page(chip->dev, data_dma_addr, ops->len, DMA_FROM_DEVICE);
#ifdef ENABLE_FLASH_RW_DUMP
// dump spare
if (readoob && oob_done_size)
{
print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, ops->oobbuf, oob_done_size);
printk("\n");
}
// dump data
if (readdata && ops->len)
{
print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, ops->datbuf, ops->len);
}
#endif
if (readdata)
ops->retlen = mtd->writesize * pages_read;
else
ops->retlen = 0;
if (readoob)
ops->oobretlen = oob_done_size;
else
ops->oobretlen = 0;
if (err)
pr_err("msm_nand_read_oob %llx %x %x failed %d, corrected %d\n",
from, ops->datbuf ? ops->len : 0, oob_count, err, total_ecc_errors);
#ifdef ENABLE_ENTRY_TRACE
else
printk("-&&&nand_readoob&&&\n");
#endif
return err;
}
static int
msm_nand_read(struct mtd_info *mtd, loff_t from, size_t len,
size_t *retlen, u_char *buf)
{
int ret;
struct mtd_oob_ops ops;
#ifdef ENABLE_ENTRY_TRACE
printk("msm_nand_read %llx %d\n", from, len);
#endif
ops.mode = MTD_OOB_PLACE;
ops.len = len;
ops.retlen = 0;
ops.ooblen = 0;
ops.datbuf = buf;
ops.oobbuf = NULL;
ret = msm_nand_read_oob(mtd, from, &ops);
*retlen = ops.retlen;
return ret;
}
static int
msm_nand_write_oob(struct mtd_info *mtd, loff_t to, struct mtd_oob_ops *ops)
{
struct msm_nand_chip *chip = mtd->priv;
struct {
dmov_s cmd[8 * 6 + 3];
unsigned cmdptr;
struct {
uint32_t cmd;
uint32_t addr0;
uint32_t addr1;
uint32_t chipsel;
uint32_t cfg0;
uint32_t cfg1;
uint32_t exec;
#if SUPPORT_WRONG_ECC_CONFIG
uint32_t ecccfg;
uint32_t ecccfg_restore;
#endif
uint32_t flash_status[8];
uint32_t zeroes;
} data;
} *dma_buffer;
dmov_s *cmd;
unsigned n;
unsigned page = 0;
uint32_t cwdatasize;
uint32_t cwoobsize;
int err=0;
dma_addr_t data_dma_addr = 0;
dma_addr_t oob_dma_addr = 0;
dma_addr_t data_dma_addr_curr = 0;
dma_addr_t oob_dma_addr_curr = 0;
unsigned page_count;
unsigned pages_written = 0;
unsigned cwperpage;
unsigned ooboffs=0;
unsigned page_oob_count=0;
unsigned page_oob_done;
uint32_t oob_count=0;
uint32_t oob_done_size=0;
int writedata=0;
int writeoob=0;
uint32_t writecmd;
static uint8_t dummyud[512];
static uint8_t dummyecc[10];
static int dummiesdone=0;
dma_addr_t dummyecc_dma_addr = 0;
#ifdef ENABLE_ENTRY_TRACE
char* oobType = "MTD_OOB_RAW";
printk("+&&&nand_writeoob&&&\n");
#endif
if (mtd->writesize == 2048)
page = to >> 11;
if (mtd->writesize == 4096)
page = to >> 12;
cwperpage = (mtd->writesize >> 9);
cwdatasize = mtd->writesize/cwperpage;
cwoobsize = mtd->oobavail/cwperpage; //can only write the user bytes per cw
if (to & (mtd->writesize - 1))
{
pr_err("%s: unsupported to, 0x%llx\n", __func__, to);
return -EINVAL;
}
if (to < (NUM_PROTECTED_BLOCKS*mtd->erasesize))
{
pr_err("%s: cannot write to page in protected area, to=0x%llx\n",
__func__, to);
return -EINVAL;
}
if (ops->datbuf != NULL && (ops->len % mtd->writesize) != 0)
{
/* when ops->datbuf is NULL, ops->len may refer to ooblen */
pr_err("%s: unsupported ops->len, %d\n", __func__, ops->len);
return -EINVAL;
}
if (ops->datbuf && ops->len > 0)
writedata=1;
if (ops->oobbuf)
{
if (ops->ooblen > 0)
{
oob_count = ops->ooblen;
writeoob=1;
}
else if (!writedata && ops->len > 0)
{
oob_count = ops->len;
writeoob=1;
}
}
if (!writedata && !writeoob)
{
pr_err("%s: nothing to do\n", __func__);
return -EINVAL;
}
if (writeoob && ops->ooboffs != 0)
{
pr_err("%s: unsupported ops->ooboffs, %d\n", __func__, ops->ooboffs);
return -EINVAL;
}
#ifdef ENABLE_ENTRY_TRACE
if (ops->mode == MTD_OOB_PLACE)
oobType = "MTD_OOB_PLACE";
else if (ops->mode == MTD_OOB_AUTO)
oobType = "MTD_OOB_AUTO";
printk("msm_nand_write_oob [%08X %08X] %08X %08X %d %s\n",
(uint32_t)(to), writedata?(uint32_t)ops->len:0, (uint32_t)ops->datbuf,
(uint32_t)ops->oobbuf, oob_count, writeoob?oobType:"OOB_NONE");
#endif
if (writeoob)
writecmd=MSM_NAND_CMD_PRG_PAGE_ALL;
else
writecmd=MSM_NAND_CMD_PRG_PAGE;
if (!writedata) // skip over ecc bytes in flash buf if ecc disabled
ooboffs = mtd->ecclayout->eccbytes/cwperpage;
if (writeoob && !writedata)
{
uint32_t maxpageoob;
if (ops->mode == MTD_OOB_AUTO)
maxpageoob=mtd->oobavail;
else
maxpageoob=mtd->oobsize;
page_count = oob_count/maxpageoob;
if (oob_count%maxpageoob != 0)
{
//assume caller wants to write only one page's oob
page_oob_count=oob_count;
page_count=1;
}
else
{
page_oob_count = maxpageoob;
}
if (!dummiesdone)
{
memset(dummyud,0xFF,sizeof(dummyud));
memset(dummyecc,0xFF,sizeof(dummyecc));
dummiesdone=1;
}
}
else
{
page_count = ops->len / mtd->writesize;
if (oob_count%page_count != 0)
{
pr_err("%s: OOB num pages != DATA num pages oob_count=%d\n", __func__, oob_count);
return -EINVAL;
}
page_oob_count = oob_count/page_count;
}
#if VERBOSE
printk("msm_nand_write_oob ops->len=%d oob_count=%d page_count=%d page_oob_count=%d\n", ops->len, oob_count, page_count, page_oob_count);
#endif
if (writedata)
{
data_dma_addr_curr = data_dma_addr = msm_nand_dma_map(chip->dev, ops->datbuf, ops->len, DMA_TO_DEVICE);
if (dma_mapping_error(chip->dev, data_dma_addr))
{
pr_err("msm_nand_write_oob: failed to get dma addr for %p\n", ops->datbuf);
return -EIO;
}
}
if (writeoob)
{
oob_dma_addr_curr = oob_dma_addr = msm_nand_dma_map(chip->dev, ops->oobbuf, oob_count, DMA_TO_DEVICE);
if (dma_mapping_error(chip->dev, oob_dma_addr))
{
pr_err("msm_nand_write_oob: failed to get dma addr for %p\n", ops->oobbuf);
err = -EIO;
goto err_dma_map_oobbuf_failed;
}
if (!writedata)
{
data_dma_addr_curr = data_dma_addr = msm_nand_dma_map(chip->dev, dummyud, sizeof(dummyud), DMA_TO_DEVICE);
if (dma_mapping_error(chip->dev, data_dma_addr))
{
pr_err("msm_nand_write_oob: failed to get dma addr for %p\n", dummyud);
err = -EIO;
goto err_dummyud_dma_failed;
}
dummyecc_dma_addr = msm_nand_dma_map(chip->dev, dummyecc, sizeof(dummyecc), DMA_TO_DEVICE);
if (dma_mapping_error(chip->dev, dummyecc_dma_addr))
{
pr_err("msm_nand_write_oob: failed to get dma addr for %p\n", dummyecc);
err = -EIO;
goto err_dummyecc_dma_failed;
}
}
}
wait_event(chip->wait_queue, (dma_buffer = msm_nand_get_dma_buffer(chip, sizeof(*dma_buffer))));
while (page_count-- > 0)
{
page_oob_done=0;
cmd = dma_buffer->cmd;
/* CMD / ADDR0 / ADDR1 / CHIPSEL program values */
dma_buffer->data.cmd = writecmd;
dma_buffer->data.addr0 = page << 16;
dma_buffer->data.addr1 = (page >> 16) & 0xff;
dma_buffer->data.chipsel = 0 | 4; /* flash0 + undoc bit */
dma_buffer->data.zeroes = 0;
dma_buffer->data.cfg0 = chip->CFG0;
dma_buffer->data.cfg1 = chip->CFG1;
if (!writedata)
dma_buffer->data.cfg1 |= (1 << 0); //disable ecc calc and write
/* GO bit for the EXEC register */
dma_buffer->data.exec = 1;
BUILD_BUG_ON(8 != ARRAY_SIZE(dma_buffer->data.flash_status));
for (n = 0; n < cwperpage ; n++)
{
/* status return words */
dma_buffer->data.flash_status[n] = 0xeeeeeeee;
/* block on cmd ready, then
* write CMD / ADDR0 / ADDR1 / CHIPSEL regs in a burst
*/
cmd->cmd = DST_CRCI_NAND_CMD;
cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.cmd);
cmd->dst = MSM_NAND_FLASH_CMD;
if (n == 0)
cmd->len = 16;
else
cmd->len = 4;
cmd++;
if (n == 0)
{
cmd->cmd = 0;
cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.cfg0);
cmd->dst = MSM_NAND_DEV0_CFG0;
cmd->len = 8;
cmd++;
#if SUPPORT_WRONG_ECC_CONFIG
if (chip->saved_ecc_buf_cfg != chip->ecc_buf_cfg)
{
dma_buffer->data.ecccfg = chip->ecc_buf_cfg;
cmd->cmd = 0;
cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.ecccfg);
cmd->dst = MSM_NAND_EBI2_ECC_BUF_CFG;
cmd->len = 4;
cmd++;
}
#endif
}
/* write data block */
if (writedata || (!pages_written && !n))
{
cmd->cmd = 0;
cmd->src = data_dma_addr_curr;
if (writedata)
data_dma_addr_curr += cwdatasize;
cmd->dst = MSM_NAND_FLASH_BUFFER;
cmd->len = cwdatasize;
cmd++;
}
if (writeoob && page_oob_done < page_oob_count)
{
if (ops->mode != MTD_OOB_AUTO) // skip over ecc bytes in input buf
{
int cweccsize=mtd->ecclayout->eccbytes/cwperpage;
int maxinc=page_oob_count-page_oob_done;
if (maxinc>cweccsize)
maxinc=cweccsize;
oob_dma_addr_curr += maxinc;
page_oob_done += maxinc;
}
if (!writedata) //if writing spare only, have to fill ecc with 0xFF
{
cmd->cmd = 0;
cmd->dst = MSM_NAND_FLASH_BUFFER + cwdatasize;
cmd->src = dummyecc_dma_addr;
cmd->len = sizeof(dummyecc);
cmd++;
}
cmd->cmd = 0;
cmd->dst = MSM_NAND_FLASH_BUFFER + cwdatasize + ooboffs;
cmd->src = oob_dma_addr_curr;
if (cwoobsize < (page_oob_count-page_oob_done) )
cmd->len = cwoobsize;
else
cmd->len = page_oob_count-page_oob_done;
#if VERBOSE
printk("msm_nand_write_oob oob_dma_addr_curr=%08x cwoobsize=%d page_oob_done=%d page_oob_count=%d\n",
(uint32_t)oob_dma_addr_curr,cwoobsize,page_oob_done,page_oob_count);
#endif
oob_dma_addr_curr += cmd->len;
page_oob_done += cmd->len;
if (ops->mode != MTD_OOB_AUTO) // skip over bbf bytes in input buf
{
int maxinc=page_oob_count-page_oob_done;
if (maxinc>2)
maxinc=2;
oob_dma_addr_curr += maxinc;
page_oob_done += maxinc;
}
if (cmd->len > 0)
cmd++;
}
/* kick the execute register */
cmd->cmd = 0;
cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.exec);
cmd->dst = MSM_NAND_EXEC_CMD;
cmd->len = 4;
cmd++;
/* block on data ready, then
* read the status register
*/
cmd->cmd = SRC_CRCI_NAND_DATA;
cmd->src = MSM_NAND_FLASH_STATUS;
cmd->dst = msm_virt_to_dma(chip, &dma_buffer->data.flash_status[n]);
cmd->len = 4;
cmd++;
/* clear the status register in case the OP_ERR is set
* due to the write, to work around a h/w bug */
cmd->cmd = 0;
cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.zeroes);
cmd->dst = MSM_NAND_FLASH_STATUS;
cmd->len = 4;
cmd++;
}
#if SUPPORT_WRONG_ECC_CONFIG
if (chip->saved_ecc_buf_cfg != chip->ecc_buf_cfg)
{
dma_buffer->data.ecccfg_restore = chip->saved_ecc_buf_cfg;
cmd->cmd = 0;
cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.ecccfg_restore);
cmd->dst = MSM_NAND_EBI2_ECC_BUF_CFG;
cmd->len = 4;
cmd++;
}
#endif
dma_buffer->cmd[0].cmd |= CMD_OCB;
cmd[-1].cmd |= CMD_OCU | CMD_LC;
BUILD_BUG_ON(8 * 6 + 3 != ARRAY_SIZE(dma_buffer->cmd));
BUG_ON(cmd - dma_buffer->cmd > ARRAY_SIZE(dma_buffer->cmd));
dma_buffer->cmdptr = (msm_virt_to_dma(chip, dma_buffer->cmd) >> 3) | CMD_PTR_LP;
dsb();
msm_dmov_exec_cmd(chip->dma_channel, crci_mask, DMOV_CMD_PTR_LIST | DMOV_CMD_ADDR(msm_virt_to_dma(chip, &dma_buffer->cmdptr)));
dsb();
/* if any of the writes failed (0x10), or there was a
* protection violation (0x100), or the program success
* bit (0x80) is unset, we lose
*/
err = 0;
for (n = 0; n < cwperpage; n++)
{
if (dma_buffer->data.flash_status[n] & 0x110)
{
if (dma_buffer->data.flash_status[n] & 0x10)
pr_err("msm_nand: critical write error, 0x%x(%d)\n", page, n);
err = -EIO;
break;
}
if (!(dma_buffer->data.flash_status[n] & 0x80))
{
err = -EIO;
break;
}
}
#if VERBOSE
pr_info("write page %d: status: %x %x %x %x %x %x %x %x\n", page,
dma_buffer->data.flash_status[0],
dma_buffer->data.flash_status[1],
dma_buffer->data.flash_status[2],
dma_buffer->data.flash_status[3],
dma_buffer->data.flash_status[4],
dma_buffer->data.flash_status[5],
dma_buffer->data.flash_status[6],
dma_buffer->data.flash_status[7]);
#endif
if (err)
break;
if (page_oob_done < page_oob_count) //they wanted to write more than we could store (yaffs hack)
{
#if VERBOSE
printk("msm_nand_write_oob: no space to write %d out of %d oob bytes, oob_done_size=%d\n",
page_oob_count-page_oob_done, page_oob_count, oob_done_size);
#endif
//just seek the outbuf for the bytes we couldnt write
oob_dma_addr_curr+= page_oob_count-page_oob_done;
page_oob_done=page_oob_count; //all done now
}
oob_done_size += page_oob_done;
pages_written++;
page++;
}
if (writedata)
ops->retlen = mtd->writesize * pages_written;
else
ops->retlen = 0;
if (writeoob)
ops->oobretlen = oob_done_size;
else
ops->oobretlen = 0;
msm_nand_release_dma_buffer(chip, dma_buffer, sizeof(*dma_buffer));
if (!writedata && writeoob)
dma_unmap_page(chip->dev, dummyecc_dma_addr, sizeof(dummyecc), DMA_TO_DEVICE);
err_dummyecc_dma_failed:
if (!writedata && writeoob)
dma_unmap_page(chip->dev, data_dma_addr, sizeof(dummyud), DMA_TO_DEVICE);
err_dummyud_dma_failed:
if (writeoob)
dma_unmap_page(chip->dev, oob_dma_addr, oob_count, DMA_TO_DEVICE);
err_dma_map_oobbuf_failed:
if (writedata)
dma_unmap_page(chip->dev, data_dma_addr, ops->len, DMA_TO_DEVICE);
#ifdef ENABLE_FLASH_RW_DUMP
// dump spare
if (ops->oobbuf && oob_done_size)
{
print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, ops->oobbuf, oob_done_size);
printk("\n");
}
// dump data
if (ops->datbuf && ops->len)
{
print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, ops->datbuf, ops->len);
}
#endif
if (err)
pr_err("msm_nand_write_oob %llx %x %x failed %d\n", to, ops->len, oob_count, err);
#ifdef ENABLE_ENTRY_TRACE
else
printk("-&&&nand_writeoob&&&\n");
#endif
return err;
}
static int msm_nand_write(struct mtd_info *mtd, loff_t to, size_t len,
size_t *retlen, const u_char *buf)
{
int ret;
struct mtd_oob_ops ops;
#ifdef ENABLE_ENTRY_TRACE
printk("nand_write\n");
#endif
ops.mode = MTD_OOB_PLACE;
ops.len = len;
ops.retlen = 0;
ops.ooblen = 0;
ops.datbuf = (uint8_t *)buf;
ops.oobbuf = NULL;
ret = msm_nand_write_oob(mtd, to, &ops);
*retlen = ops.retlen;
return ret;
}
static int
msm_nand_erase(struct mtd_info *mtd, struct erase_info *instr)
{
int err;
struct msm_nand_chip *chip = mtd->priv;
struct {
dmov_s cmd[5];
unsigned cmdptr;
unsigned data[9];
} *dma_buffer;
unsigned page = 0;
if (mtd->writesize == 2048)
page = instr->addr >> 11;
if (mtd->writesize == 4096)
page = instr->addr >> 12;
#ifdef ENABLE_ENTRY_TRACE
printk("msm_nand_erase(%d)\n", page);
#endif
if (instr->addr & (mtd->erasesize - 1)) {
pr_err("%s: unsupported erase address, 0x%llx\n",
__func__, instr->addr);
return -EINVAL;
}
if (instr->addr < (NUM_PROTECTED_BLOCKS*mtd->erasesize))
{
pr_err("%s: cannot erase block in protected area, addr=0x%llx\n",
__func__, instr->addr);
return -EINVAL;
}
if (instr->len != mtd->erasesize) {
pr_err("%s: unsupported erase len, %lld\n",
__func__, instr->len);
return -EINVAL;
}
wait_event(chip->wait_queue,
(dma_buffer = msm_nand_get_dma_buffer(
chip, sizeof(*dma_buffer))));
dma_buffer->data[0] = MSM_NAND_CMD_BLOCK_ERASE;
dma_buffer->data[1] = page;
dma_buffer->data[2] = 0;
dma_buffer->data[3] = 0 | 4;
dma_buffer->data[4] = 1;
dma_buffer->data[5] = 0xeeeeeeee;
dma_buffer->data[6] = chip->CFG0 & (~(7 << 6)); /* CW_PER_PAGE = 0 */
dma_buffer->data[7] = chip->CFG1;
dma_buffer->data[8] = 0;
BUILD_BUG_ON(8 != ARRAY_SIZE(dma_buffer->data) - 1);
dma_buffer->cmd[0].cmd = DST_CRCI_NAND_CMD | CMD_OCB;
dma_buffer->cmd[0].src = msm_virt_to_dma(chip, &dma_buffer->data[0]);
dma_buffer->cmd[0].dst = MSM_NAND_FLASH_CMD;
dma_buffer->cmd[0].len = 16;
dma_buffer->cmd[1].cmd = 0;
dma_buffer->cmd[1].src = msm_virt_to_dma(chip, &dma_buffer->data[6]);
dma_buffer->cmd[1].dst = MSM_NAND_DEV0_CFG0;
dma_buffer->cmd[1].len = 8;
dma_buffer->cmd[2].cmd = 0;
dma_buffer->cmd[2].src = msm_virt_to_dma(chip, &dma_buffer->data[4]);
dma_buffer->cmd[2].dst = MSM_NAND_EXEC_CMD;
dma_buffer->cmd[2].len = 4;
dma_buffer->cmd[3].cmd = SRC_CRCI_NAND_DATA;
dma_buffer->cmd[3].src = MSM_NAND_FLASH_STATUS;
dma_buffer->cmd[3].dst = msm_virt_to_dma(chip, &dma_buffer->data[5]);
dma_buffer->cmd[3].len = 4;
/* clear the status register in case the OP_ERR is set
* due to the write, to work around a h/w bug */
dma_buffer->cmd[4].cmd = CMD_OCU | CMD_LC;
dma_buffer->cmd[4].src = msm_virt_to_dma(chip, &dma_buffer->data[8]);
dma_buffer->cmd[4].dst = MSM_NAND_FLASH_STATUS;
dma_buffer->cmd[4].len = 4;
BUILD_BUG_ON(4 != ARRAY_SIZE(dma_buffer->cmd) - 1);
dma_buffer->cmdptr =
(msm_virt_to_dma(chip, dma_buffer->cmd) >> 3) | CMD_PTR_LP;
dsb();
msm_dmov_exec_cmd(
chip->dma_channel, crci_mask, DMOV_CMD_PTR_LIST |
DMOV_CMD_ADDR(msm_virt_to_dma(chip, &dma_buffer->cmdptr)));
dsb();
/* we fail if there was an operation error, a mpu error, or the
* erase success bit was not set.
*/
if (dma_buffer->data[5] & 0x110 || !(dma_buffer->data[5] & 0x80)) {
if (dma_buffer->data[5] & 0x10)
pr_warning("msm_nand: critical erase error, 0x%llx\n",
instr->addr);
err = -EIO;
} else
err = 0;
msm_nand_release_dma_buffer(chip, dma_buffer, sizeof(*dma_buffer));
if (err) {
pr_err("%s: erase failed, 0x%llx\n", __func__, instr->addr);
instr->fail_addr = instr->addr;
instr->state = MTD_ERASE_FAILED;
} else {
instr->state = MTD_ERASE_DONE;
instr->fail_addr = 0xffffffff;
mtd_erase_callback(instr);
}
return err;
}
static int
msm_nand_block_isbad(struct mtd_info *mtd, loff_t ofs)
{
struct msm_nand_chip *chip = mtd->priv;
int ret;
struct {
dmov_s cmd[5];
unsigned cmdptr;
struct {
uint32_t cmd;
uint32_t addr0;
uint32_t addr1;
uint32_t chipsel;
uint32_t cfg0;
uint32_t cfg1;
uint32_t exec;
uint32_t ecccfg;
struct {
uint32_t flash_status;
uint32_t buffer_status;
} result;
} data;
} *dma_buffer;
dmov_s *cmd;
uint8_t *buf;
unsigned page = 0;
unsigned cwperpage;
if (mtd->writesize == 2048)
page = ofs >> 11;
if (mtd->writesize == 4096)
page = ofs >> 12;
cwperpage = (mtd->writesize >> 9);
/* Check for invalid offset */
if (ofs > mtd->size)
return -EINVAL;
if (ofs & (mtd->erasesize - 1)) {
pr_err("%s: unsupported block address, 0x%x\n",
__func__, (uint32_t)ofs);
return -EINVAL;
}
if (ofs < (NUM_PROTECTED_BLOCKS*mtd->erasesize))
{
//protected blocks are always good
return 0;
}
wait_event(chip->wait_queue,
(dma_buffer = msm_nand_get_dma_buffer(chip ,
sizeof(*dma_buffer) + 4)));
buf = (uint8_t *)dma_buffer + sizeof(*dma_buffer);
/* Read 4 bytes starting from the bad block marker location
* in the last code word of the page
*/
cmd = dma_buffer->cmd;
dma_buffer->data.cmd = MSM_NAND_CMD_PAGE_READ;
dma_buffer->data.cfg0 = MSM_NAND_CFG0_RAW & ~(7U << 6);
dma_buffer->data.cfg1 = MSM_NAND_CFG1_RAW | (chip->CFG1 & CFG1_WIDE_FLASH);
if (chip->CFG1 & CFG1_WIDE_FLASH)
dma_buffer->data.addr0 = (page << 16) |
((528*(cwperpage-1)) >> 1);
else
dma_buffer->data.addr0 = (page << 16) |
(528*(cwperpage-1));
dma_buffer->data.addr1 = (page >> 16) & 0xff;
dma_buffer->data.chipsel = 0 | 4;
dma_buffer->data.exec = 1;
dma_buffer->data.result.flash_status = 0xeeeeeeee;
dma_buffer->data.result.buffer_status = 0xeeeeeeee;
cmd->cmd = DST_CRCI_NAND_CMD;
cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.cmd);
cmd->dst = MSM_NAND_FLASH_CMD;
cmd->len = 16;
cmd++;
cmd->cmd = 0;
cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.cfg0);
cmd->dst = MSM_NAND_DEV0_CFG0;
cmd->len = 8;
cmd++;
cmd->cmd = 0;
cmd->src = msm_virt_to_dma(chip, &dma_buffer->data.exec);
cmd->dst = MSM_NAND_EXEC_CMD;
cmd->len = 4;
cmd++;
cmd->cmd = SRC_CRCI_NAND_DATA;
cmd->src = MSM_NAND_FLASH_STATUS;
cmd->dst = msm_virt_to_dma(chip, &dma_buffer->data.result);
cmd->len = 8;
cmd++;
cmd->cmd = 0;
cmd->src = MSM_NAND_FLASH_BUFFER + (mtd->writesize - (528*(cwperpage-1)));
cmd->dst = msm_virt_to_dma(chip, buf);
cmd->len = 4;
cmd++;
BUILD_BUG_ON(5 != ARRAY_SIZE(dma_buffer->cmd));
BUG_ON(cmd - dma_buffer->cmd > ARRAY_SIZE(dma_buffer->cmd));
dma_buffer->cmd[0].cmd |= CMD_OCB;
cmd[-1].cmd |= CMD_OCU | CMD_LC;
dma_buffer->cmdptr = (msm_virt_to_dma(chip,
dma_buffer->cmd) >> 3) | CMD_PTR_LP;
dsb();
msm_dmov_exec_cmd(chip->dma_channel, crci_mask, DMOV_CMD_PTR_LIST |
DMOV_CMD_ADDR(msm_virt_to_dma(chip, &dma_buffer->cmdptr)));
dsb();
ret = 0;
if (dma_buffer->data.result.flash_status & 0x110)
ret = -EIO;
if (!ret) {
/* Check for bad block marker byte */
if (chip->CFG1 & CFG1_WIDE_FLASH) {
if (buf[0] != 0xFF || buf[1] != 0xFF)
ret = 1;
} else {
if (buf[0] != 0xFF)
ret = 1;
}
}
if (ret==1)
printk("###BAD BLOCK %d %08X###\n", (uint32_t)(ofs) / mtd->erasesize, (uint32_t)ofs);
else if (ret != 0)
printk("###ERROR CHECKING BLOCK %d %08X###\n", (uint32_t)(ofs) / mtd->erasesize, (uint32_t)ofs);
msm_nand_release_dma_buffer(chip, dma_buffer, sizeof(*dma_buffer) + 4);
return ret;
}
static int
msm_nand_block_markbad(struct mtd_info *mtd, loff_t ofs)
{
/* struct msm_nand_chip *this = mtd->priv; */
int ret;
ret = msm_nand_block_isbad(mtd, ofs);
if (ret) {
/* If it was bad already, return success and do nothing */
if (ret > 0)
return 0;
return ret;
}
return -EIO;
}
/**
* msm_nand_suspend - [MTD Interface] Suspend the msm_nand flash
* @param mtd MTD device structure
*/
static int msm_nand_suspend(struct mtd_info *mtd)
{
return 0;
}
/**
* msm_nand_resume - [MTD Interface] Resume the msm_nand flash
* @param mtd MTD device structure
*/
static void msm_nand_resume(struct mtd_info *mtd)
{
}
/**
* Export 3 attributes for HTC SSD HW INFO tool
* >info :basic HW spec of this NAND chip
* >vendor :vendor information
* >pagesize:page size, either 2048 or 4096
*/
static int param_get_vendor_name(char *buffer, struct kernel_param *kp)
{
return sprintf(buffer, "%s", nand_info->maker_name);
}
module_param_call(vendor, NULL, param_get_vendor_name, NULL, S_IRUGO);
static int param_get_nand_info(char *buffer, struct kernel_param *kp)
{
int result = 0;
result += sprintf(buffer, "<< NAND INFO >>\n");
result += sprintf(buffer + result, "flash id\t =%X\n",
nand_info->flash_id);
result += sprintf(buffer + result, "vendor\t\t =%s\n",
nand_info->maker_name);
result += sprintf(buffer + result, "width\t\t =%d bits\n",
nand_info->width);
result += sprintf(buffer + result, "size\t\t =%d MB\n",
nand_info->size>>20);
result += sprintf(buffer + result, "block count\t =%d\n",
nand_info->block_count);
result += sprintf(buffer + result, "page count\t =%d",
nand_info->page_count);
return result;
}
module_param_call(info, NULL, param_get_nand_info, NULL, S_IRUGO);
static int param_get_page_size(char *buffer, struct kernel_param *kp)
{
return sprintf(buffer, "%d", nand_info->page_size);
}
module_param_call(pagesize, NULL, param_get_page_size, NULL, S_IRUGO);
/**
* msm_nand_scan - [msm_nand Interface] Scan for the msm_nand device
* @param mtd MTD device structure
* @param maxchips Number of chips to scan for
*
* This fills out all the not initialized function pointers
* with the defaults.
* The flash ID is read and the mtd/chip structures are
* filled with the appropriate values.
*/
int msm_nand_scan(struct mtd_info *mtd, int maxchips)
{
unsigned n;
struct msm_nand_chip *chip = mtd->priv;
uint32_t flash_id = 0, i = 1, mtd_writesize;
uint8_t dev_found = 0;
uint8_t wide_bus;
uint8_t index;
/* Read the Flash ID from the Nand Flash Device */
flash_id = flash_read_id(chip);
for (index = 1; index < ARRAY_SIZE(supported_flash); index++) {
if ((flash_id & supported_flash[index].mask) ==
(supported_flash[index].flash_id &
(supported_flash[index].mask))) {
dev_found = 1;
break;
}
}
if (dev_found) {
wide_bus = supported_flash[index].widebus;
mtd->size = supported_flash[index].density * i;
mtd->writesize = supported_flash[index].pagesize * i;
mtd->oobsize = supported_flash[index].oobsize * i;
mtd->erasesize = supported_flash[index].blksize * i;
mtd_writesize = mtd->writesize;
pr_info("Found a supported NAND device\n");
pr_info("NAND Id : 0x%X\n", supported_flash[index].
flash_id);
pr_info("Buswidth : %d Bits \n", (wide_bus) ? 16 : 8);
pr_info("Density : %lld MByte\n", (mtd->size>>20));
pr_info("Pagesize : %d Bytes\n", mtd->writesize);
pr_info("Erasesize: %d Bytes\n", mtd->erasesize);
pr_info("Oobsize : %d Bytes\n", mtd->oobsize);
} else {
pr_err("Unsupported Nand,Id: 0x%x \n", flash_id);
return -ENODEV;
}
if (mtd->writesize != 2048)
{
pr_err("ERROR: unsupported flash parameters!\n");
return -ENODEV;
}
if (flash_read_config(chip))
{
pr_err("ERROR: could not save CFG0 & CFG1 state\n");
return -ENODEV;
}
pr_info("CFG0 Old: 0x%08x \n", chip->CFG0);
pr_info("CFG1 Old: 0x%08x \n", chip->CFG1);
chip->CFG0 = (((mtd->writesize >> 9)-1) << 6) /* 4/8 cw/per page for 2/4k */
| (512 << 9) /* 512 user data bytes */
| (10 << 19) /* 10 parity bytes */
| (4 << 23) /* spare size */
| (5 << 27) /* 5 address cycles */
| (1 << 30) /* Read status before data */
| (1 << 31); /* Send read cmd */
chip->CFG1 = chip->CFG1
#if IGNORE_ARM9_CONFIG
/* use ARM11 own setting on CFG1 */
| (7 << 2) /* 8 recovery cycles */
| (0 << 5) /* Allow CS deassertion */
| (2 << 17) /* 6 cycle tWB/tRB */
#endif
| ((mtd->writesize - (528 * ((mtd->writesize >> 9) - 1)) + 1) << 6) /* Bad block marker location */
| (wide_bus << 1); /* Wide flash bit */
chip->CFG1 = chip->CFG1
& ~(1 << 0) /* Enable ecc */
& ~(1 << 16); /* Bad block in user data area */
pr_info("CFG0 Init : 0x%08x \n", chip->CFG0);
pr_info("CFG1 Init : 0x%08x \n", chip->CFG1);
pr_info("CFG0: cw/page=%d ud_sz=%d ecc_sz=%d spare_sz=%d "
"num_addr_cycles=%d\n", (chip->CFG0 >> 6) & 7,
(chip->CFG0 >> 9) & 0x3ff, (chip->CFG0 >> 19) & 15,
(chip->CFG0 >> 23) & 15, (chip->CFG0 >> 27) & 7);
n = flash_rd_reg(chip, MSM_NAND_DEV_CMD1);
pr_info("DEV_CMD1: %x\n", n);
n = flash_rd_reg(chip, MSM_NAND_EBI2_ECC_BUF_CFG);
pr_info(KERN_INFO "NAND_EBI2_ECC_BUF_CFG: %x\n", n);
#if SUPPORT_WRONG_ECC_CONFIG
chip->ecc_buf_cfg = 0x1FF;
chip->saved_ecc_buf_cfg = n;
#endif
if (mtd->oobsize == 64)
{
mtd->oobavail = msm_nand_oob_64.oobavail;
mtd->ecclayout = &msm_nand_oob_64;
}
else
{
pr_err("Unsupported Nand, oobsize: 0x%x \n", mtd->oobsize);
return -ENODEV;
}
/* Fill in remaining MTD driver data */
mtd->type = MTD_NANDFLASH;
mtd->flags = MTD_CAP_NANDFLASH;
/* mtd->ecctype = MTD_ECC_SW; */
mtd->erase = msm_nand_erase;
mtd->point = NULL;
mtd->unpoint = NULL;
mtd->read = msm_nand_read;
mtd->write = msm_nand_write;
mtd->read_oob = msm_nand_read_oob;
mtd->write_oob = msm_nand_write_oob;
/* mtd->sync = msm_nand_sync; */
mtd->lock = NULL;
/* mtd->unlock = msm_nand_unlock; */
mtd->suspend = msm_nand_suspend;
mtd->resume = msm_nand_resume;
mtd->block_isbad = msm_nand_block_isbad;
mtd->block_markbad = msm_nand_block_markbad;
mtd->owner = THIS_MODULE;
/* Information provides to HTC SSD HW Info tool */
nand_info = &chip->dev_info;
nand_info->flash_id = flash_id;
nand_info->maker_id = (flash_id & 0xff);
switch (nand_info->maker_id)
{
case 0xec:
strcpy(nand_info->maker_name, "Samsung");
break;
case 0xad:
strcpy(nand_info->maker_name, "Hynix");
break;
case 0x2c:
strcpy(nand_info->maker_name, "Micron");
break;
default:
strcpy(nand_info->maker_name, "Unknown");
break;
}
nand_info->width = (wide_bus? 16: 8);
nand_info->size = mtd->size;
nand_info->page_size = mtd->writesize;
nand_info->page_count = mtd->erasesize/mtd->writesize;
nand_info->block_count = mtd->size;
do_div(nand_info->block_count, nand_info->page_size * nand_info->page_count);
/* Unlock whole block */
/* msm_nand_unlock_all(mtd); */
/* return this->scan_bbt(mtd); */
#if VERBOSE
for (i=0;i<nand_info->block_count;i++)
{
int blockretval = msm_nand_block_isbad(mtd,i*mtd->erasesize);
if(blockretval == 1)
{
pr_info("msm_nand block %d is bad\n",i);
}
else if (blockretval == -EINVAL)
{
pr_info("msm_nand block %d -EINVAL\n",i);
}
else if (blockretval == -EIO)
{
pr_info("msm_nand block %d -EIO\n",i);
}
}
#endif
return 0;
}
EXPORT_SYMBOL_GPL(msm_nand_scan);
/**
* msm_nand_release - [msm_nand Interface] Free resources held by the msm_nand device
* @param mtd MTD device structure
*/
void msm_nand_release(struct mtd_info *mtd)
{
/* struct msm_nand_chip *this = mtd->priv; */
#ifdef CONFIG_MTD_PARTITIONS
/* Deregister partitions */
del_mtd_partitions(mtd);
#endif
/* Deregister the device */
del_mtd_device(mtd);
}
EXPORT_SYMBOL_GPL(msm_nand_release);
#ifdef CONFIG_MTD_PARTITIONS
static const char *part_probes[] = { "cmdlinepart", NULL, };
#endif
struct msm_nand_info {
struct mtd_info mtd;
struct mtd_partition *parts;
struct msm_nand_chip msm_nand;
};
static int __devinit msm_nand_probe(struct platform_device *pdev)
{
struct msm_nand_info *info;
struct flash_platform_data *pdata = pdev->dev.platform_data;
int err, i;
if (pdev->num_resources != 1) {
pr_err("invalid num_resources");
return -ENODEV;
}
if (pdev->resource[0].flags != IORESOURCE_DMA) {
pr_err("invalid resource type");
return -ENODEV;
}
info = kzalloc(sizeof(struct msm_nand_info), GFP_KERNEL);
if (!info)
return -ENOMEM;
info->msm_nand.dev = &pdev->dev;
init_waitqueue_head(&info->msm_nand.wait_queue);
info->msm_nand.dma_channel = pdev->resource[0].start;
/* this currently fails if dev is passed in */
info->msm_nand.dma_buffer =
dma_alloc_coherent(/*dev*/ NULL, MSM_NAND_DMA_BUFFER_SIZE,
&info->msm_nand.dma_addr, GFP_KERNEL);
if (info->msm_nand.dma_buffer == NULL) {
err = -ENOMEM;
goto out_free_info;
}
pr_info("msm_nand: allocated dma buffer at %p, dma_addr %x\n",
info->msm_nand.dma_buffer, info->msm_nand.dma_addr);
info->mtd.name = dev_name(&pdev->dev);
info->mtd.priv = &info->msm_nand;
info->mtd.owner = THIS_MODULE;
if (msm_nand_scan(&info->mtd, 1)) {
err = -ENXIO;
goto out_free_dma_buffer;
}
printk("#MTD# parts in atag = %d\n", pdata->nr_parts);
#ifdef CONFIG_MTD_PARTITIONS
/* Re-calculate the partition offset and size with correct page size */
for (i = 0; i < pdata->nr_parts; i++) {
pdata->parts[i].offset = pdata->parts[i].offset
* info->mtd.erasesize;
pdata->parts[i].size = pdata->parts[i].size
* info->mtd.erasesize;
}
err = parse_mtd_partitions(&info->mtd, part_probes, &info->parts, 0);
if (err > 0)
add_mtd_partitions(&info->mtd, info->parts, err);
else if (err <= 0 && pdata && pdata->parts)
add_mtd_partitions(&info->mtd, pdata->parts, pdata->nr_parts);
else
#endif
err = add_mtd_device(&info->mtd);
dev_set_drvdata(&pdev->dev, info);
return 0;
out_free_dma_buffer:
dma_free_coherent(/*dev*/ NULL, SZ_4K, info->msm_nand.dma_buffer,
info->msm_nand.dma_addr);
out_free_info:
kfree(info);
return err;
}
static int __devexit msm_nand_remove(struct platform_device *pdev)
{
struct msm_nand_info *info = dev_get_drvdata(&pdev->dev);
dev_set_drvdata(&pdev->dev, NULL);
if (info) {
#ifdef CONFIG_MTD_PARTITIONS
if (info->parts)
del_mtd_partitions(&info->mtd);
else
#endif
del_mtd_device(&info->mtd);
msm_nand_release(&info->mtd);
dma_free_coherent(/*dev*/ NULL, SZ_4K,
info->msm_nand.dma_buffer,
info->msm_nand.dma_addr);
kfree(info);
}
return 0;
}
#define DRIVER_NAME "msm_nand"
static struct platform_driver msm_nand_driver = {
.probe = msm_nand_probe,
.remove = __devexit_p(msm_nand_remove),
.driver = {
.name = DRIVER_NAME,
}
};
MODULE_ALIAS(DRIVER_NAME);
static int __init msm_nand_init(void)
{
return platform_driver_register(&msm_nand_driver);
}
static void __exit msm_nand_exit(void)
{
platform_driver_unregister(&msm_nand_driver);
}
module_init(msm_nand_init);
module_exit(msm_nand_exit);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("htcleo nand driver code");
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