.oobavail = 8,
};
-/**
- * struct docg3_bch - BCH engine
- */
-static struct bch_control *docg3_bch;
-
static inline u8 doc_readb(struct docg3 *docg3, u16 reg)
{
- u8 val = readb(docg3->base + reg);
+ u8 val = readb(docg3->cascade->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);
+ u16 val = readw(docg3->cascade->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);
+ writeb(val, docg3->cascade->base + reg);
trace_docg3_io(1, 8, reg, val);
}
static inline void doc_writew(struct docg3 *docg3, u16 val, u16 reg)
{
- writew(val, docg3->base + reg);
+ writew(val, docg3->cascade->base + reg);
trace_docg3_io(1, 16, reg, val);
}
for (i = 0; i < DOC_ECC_BCH_SIZE; i++)
ecc[i] = bitrev8(hwecc[i]);
- numerrs = decode_bch(docg3_bch, NULL, DOC_ECC_BCH_COVERED_BYTES,
+ numerrs = decode_bch(docg3->cascade->bch, NULL,
+ DOC_ECC_BCH_COVERED_BYTES,
NULL, ecc, NULL, errorpos);
BUG_ON(numerrs == -EINVAL);
if (numerrs < 0)
* 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
+ * @buf: the buffer to be filled in (or NULL is forget bytes)
* @first: 1 if first time read, DOC_READADDRESS should be set
*
*/
struct mtd_oob_ops *ops)
{
struct docg3 *docg3 = mtd->priv;
- int block0, block1, page, ret, ofs = 0;
+ int block0, block1, page, ret, skip, ofs = 0;
u8 *oobbuf = ops->oobbuf;
u8 *buf = ops->datbuf;
size_t len, ooblen, nbdata, nboob;
doc_dbg("doc_read_oob(from=%lld, mode=%d, data=(%p:%zu), oob=(%p:%zu))\n",
from, ops->mode, buf, len, oobbuf, ooblen);
- if ((len % DOC_LAYOUT_PAGE_SIZE) || (ooblen % DOC_LAYOUT_OOB_SIZE) ||
- (from % DOC_LAYOUT_PAGE_SIZE))
+ if (ooblen % DOC_LAYOUT_OOB_SIZE)
return -EINVAL;
- ret = -EINVAL;
- calc_block_sector(from + len, &block0, &block1, &page, &ofs,
- docg3->reliable);
- if (block1 > docg3->max_block)
- goto err;
+ if (from + len > mtd->size)
+ return -EINVAL;
ops->oobretlen = 0;
ops->retlen = 0;
ret = 0;
+ skip = from % DOC_LAYOUT_PAGE_SIZE;
+ mutex_lock(&docg3->cascade->lock);
while (!ret && (len > 0 || ooblen > 0)) {
- calc_block_sector(from, &block0, &block1, &page, &ofs,
+ calc_block_sector(from - skip, &block0, &block1, &page, &ofs,
docg3->reliable);
- nbdata = min_t(size_t, len, (size_t)DOC_LAYOUT_PAGE_SIZE);
+ nbdata = min_t(size_t, len, DOC_LAYOUT_PAGE_SIZE - skip);
nboob = min_t(size_t, ooblen, (size_t)DOC_LAYOUT_OOB_SIZE);
ret = doc_read_page_prepare(docg3, block0, block1, page, ofs);
if (ret < 0)
- goto err;
+ goto out;
ret = doc_read_page_ecc_init(docg3, DOC_ECC_BCH_TOTAL_BYTES);
if (ret < 0)
goto err_in_read;
- ret = doc_read_page_getbytes(docg3, nbdata, buf, 1);
+ ret = doc_read_page_getbytes(docg3, skip, NULL, 1);
+ if (ret < skip)
+ goto err_in_read;
+ ret = doc_read_page_getbytes(docg3, nbdata, buf, 0);
if (ret < nbdata)
goto err_in_read;
- doc_read_page_getbytes(docg3, DOC_LAYOUT_PAGE_SIZE - nbdata,
+ doc_read_page_getbytes(docg3,
+ DOC_LAYOUT_PAGE_SIZE - nbdata - skip,
NULL, 0);
ret = doc_read_page_getbytes(docg3, nboob, oobbuf, 0);
if (ret < nboob)
len -= nbdata;
ooblen -= nboob;
from += DOC_LAYOUT_PAGE_SIZE;
+ skip = 0;
}
+out:
+ mutex_unlock(&docg3->cascade->lock);
return ret;
err_in_read:
doc_read_page_finish(docg3);
-err:
- return ret;
+ goto out;
}
/**
*/
static int doc_write_erase_wait_status(struct docg3 *docg3)
{
- int status, ret = 0;
+ int i, status, ret = 0;
- if (!doc_is_ready(docg3))
- usleep_range(3000, 3000);
+ for (i = 0; !doc_is_ready(docg3) && i < 5; i++)
+ msleep(20);
if (!doc_is_ready(docg3)) {
doc_dbg("Timeout reached and the chip is still not ready\n");
ret = -EAGAIN;
int block0, block1, page, ret, ofs = 0;
doc_dbg("doc_erase(from=%lld, len=%lld\n", info->addr, info->len);
- doc_set_device_id(docg3, docg3->device_id);
info->state = MTD_ERASE_PENDING;
calc_block_sector(info->addr + info->len, &block0, &block1, &page,
&ofs, docg3->reliable);
ret = -EINVAL;
- if (block1 > docg3->max_block || page || ofs)
+ if (info->addr + info->len > mtd->size || page || ofs)
goto reset_err;
ret = 0;
calc_block_sector(info->addr, &block0, &block1, &page, &ofs,
docg3->reliable);
+ mutex_lock(&docg3->cascade->lock);
+ doc_set_device_id(docg3, docg3->device_id);
doc_set_reliable_mode(docg3);
for (len = info->len; !ret && len > 0; len -= mtd->erasesize) {
info->state = MTD_ERASING;
block0 += 2;
block1 += 2;
}
+ mutex_unlock(&docg3->cascade->lock);
if (ret)
goto reset_err;
struct mtd_oob_ops *ops)
{
struct docg3 *docg3 = mtd->priv;
- int block0, block1, page, ret, pofs = 0, autoecc, oobdelta;
+ int ret, autoecc, oobdelta;
u8 *oobbuf = ops->oobbuf;
u8 *buf = ops->datbuf;
size_t len, ooblen;
if (len && ooblen &&
(len / DOC_LAYOUT_PAGE_SIZE) != (ooblen / oobdelta))
return -EINVAL;
-
- ret = -EINVAL;
- calc_block_sector(ofs + len, &block0, &block1, &page, &pofs,
- docg3->reliable);
- if (block1 > docg3->max_block)
- goto err;
+ if (ofs + len > mtd->size)
+ return -EINVAL;
ops->oobretlen = 0;
ops->retlen = 0;
if (autoecc < 0)
return autoecc;
+ mutex_lock(&docg3->cascade->lock);
while (!ret && len > 0) {
memset(oob, 0, sizeof(oob));
if (ofs == docg3->oob_write_ofs)
}
ops->retlen += DOC_LAYOUT_PAGE_SIZE;
}
-err:
+
doc_set_device_id(docg3, 0);
+ mutex_unlock(&docg3->cascade->lock);
return ret;
}
struct docg3 *docg3 = sysfs_dev2docg3(dev, attr);
int dps0;
+ mutex_lock(&docg3->cascade->lock);
doc_set_device_id(docg3, docg3->device_id);
dps0 = doc_register_readb(docg3, DOC_DPS0_STATUS);
doc_set_device_id(docg3, 0);
+ mutex_unlock(&docg3->cascade->lock);
return sprintf(buf, "%d\n", !(dps0 & DOC_DPS_KEY_OK));
}
struct docg3 *docg3 = sysfs_dev2docg3(dev, attr);
int dps1;
+ mutex_lock(&docg3->cascade->lock);
doc_set_device_id(docg3, docg3->device_id);
dps1 = doc_register_readb(docg3, DOC_DPS1_STATUS);
doc_set_device_id(docg3, 0);
+ mutex_unlock(&docg3->cascade->lock);
return sprintf(buf, "%d\n", !(dps1 & DOC_DPS_KEY_OK));
}
if (count != DOC_LAYOUT_DPS_KEY_LENGTH)
return -EINVAL;
+ mutex_lock(&docg3->cascade->lock);
doc_set_device_id(docg3, docg3->device_id);
for (i = 0; i < DOC_LAYOUT_DPS_KEY_LENGTH; i++)
doc_writeb(docg3, buf[i], DOC_DPS0_KEY);
doc_set_device_id(docg3, 0);
+ mutex_unlock(&docg3->cascade->lock);
return count;
}
if (count != DOC_LAYOUT_DPS_KEY_LENGTH)
return -EINVAL;
+ mutex_lock(&docg3->cascade->lock);
doc_set_device_id(docg3, docg3->device_id);
for (i = 0; i < DOC_LAYOUT_DPS_KEY_LENGTH; i++)
doc_writeb(docg3, buf[i], DOC_DPS1_KEY);
doc_set_device_id(docg3, 0);
+ mutex_unlock(&docg3->cascade->lock);
return count;
}
};
static int doc_register_sysfs(struct platform_device *pdev,
- struct mtd_info **floors)
+ struct docg3_cascade *cascade)
{
int ret = 0, floor, i = 0;
struct device *dev = &pdev->dev;
- for (floor = 0; !ret && floor < DOC_MAX_NBFLOORS && floors[floor];
- floor++)
+ for (floor = 0; !ret && floor < DOC_MAX_NBFLOORS &&
+ cascade->floors[floor]; floor++)
for (i = 0; !ret && i < 4; i++)
ret = device_create_file(dev, &doc_sys_attrs[floor][i]);
if (!ret)
}
static void doc_unregister_sysfs(struct platform_device *pdev,
- struct mtd_info **floors)
+ struct docg3_cascade *cascade)
{
struct device *dev = &pdev->dev;
int floor, i;
- for (floor = 0; floor < DOC_MAX_NBFLOORS && floors[floor];
+ for (floor = 0; floor < DOC_MAX_NBFLOORS && cascade->floors[floor];
floor++)
for (i = 0; i < 4; i++)
device_remove_file(dev, &doc_sys_attrs[floor][i]);
struct docg3 *docg3 = (struct docg3 *)s->private;
int pos = 0;
- u8 fctrl = doc_register_readb(docg3, DOC_FLASHCONTROL);
+ u8 fctrl;
+
+ mutex_lock(&docg3->cascade->lock);
+ fctrl = doc_register_readb(docg3, DOC_FLASHCONTROL);
+ mutex_unlock(&docg3->cascade->lock);
pos += seq_printf(s,
"FlashControl : 0x%02x (%s,CE# %s,%s,%s,flash %s)\n",
{
struct docg3 *docg3 = (struct docg3 *)s->private;
- int pos = 0;
- int pctrl = doc_register_readb(docg3, DOC_ASICMODE);
- int mode = pctrl & 0x03;
+ int pos = 0, pctrl, mode;
+
+ mutex_lock(&docg3->cascade->lock);
+ pctrl = doc_register_readb(docg3, DOC_ASICMODE);
+ mode = pctrl & 0x03;
+ mutex_unlock(&docg3->cascade->lock);
pos += seq_printf(s,
"%04x : RAM_WE=%d,RSTIN_RESET=%d,BDETCT_RESET=%d,WRITE_ENABLE=%d,POWERDOWN=%d,MODE=%d%d (",
{
struct docg3 *docg3 = (struct docg3 *)s->private;
int pos = 0;
- int id = doc_register_readb(docg3, DOC_DEVICESELECT);
+ int id;
+
+ mutex_lock(&docg3->cascade->lock);
+ id = doc_register_readb(docg3, DOC_DEVICESELECT);
+ mutex_unlock(&docg3->cascade->lock);
pos += seq_printf(s, "DeviceId = %d\n", id);
return pos;
int pos = 0;
int protect, dps0, dps0_low, dps0_high, dps1, dps1_low, dps1_high;
+ mutex_lock(&docg3->cascade->lock);
protect = doc_register_readb(docg3, DOC_PROTECTION);
dps0 = doc_register_readb(docg3, DOC_DPS0_STATUS);
dps0_low = doc_register_readw(docg3, DOC_DPS0_ADDRLOW);
dps1 = doc_register_readb(docg3, DOC_DPS1_STATUS);
dps1_low = doc_register_readw(docg3, DOC_DPS1_ADDRLOW);
dps1_high = doc_register_readw(docg3, DOC_DPS1_ADDRHIGH);
+ mutex_unlock(&docg3->cascade->lock);
pos += seq_printf(s, "Protection = 0x%02x (",
protect);
switch (chip_id) {
case DOC_CHIPID_G3:
- mtd->name = kasprintf(GFP_KERNEL, "DiskOnChip G3 floor %d",
+ mtd->name = kasprintf(GFP_KERNEL, "docg3.%d",
docg3->device_id);
docg3->max_block = 2047;
break;
mtd->erasesize = DOC_LAYOUT_BLOCK_SIZE * DOC_LAYOUT_NBPLANES;
if (docg3->reliable == 2)
mtd->erasesize /= 2;
- mtd->writesize = DOC_LAYOUT_PAGE_SIZE;
+ mtd->writebufsize = mtd->writesize = DOC_LAYOUT_PAGE_SIZE;
mtd->oobsize = DOC_LAYOUT_OOB_SIZE;
mtd->owner = THIS_MODULE;
- mtd->erase = doc_erase;
- mtd->read = doc_read;
- mtd->write = doc_write;
- mtd->read_oob = doc_read_oob;
- mtd->write_oob = doc_write_oob;
- mtd->block_isbad = doc_block_isbad;
+ mtd->_erase = doc_erase;
+ mtd->_read = doc_read;
+ mtd->_write = doc_write;
+ mtd->_read_oob = doc_read_oob;
+ mtd->_write_oob = doc_write_oob;
+ mtd->_block_isbad = doc_block_isbad;
mtd->ecclayout = &docg3_oobinfo;
+ mtd->ecc_strength = DOC_ECC_BCH_T;
}
/**
* @base: the io space where the device is probed
* @floor: the floor of the probed device
* @dev: the device
+ * @cascade: the cascade of chips this devices will belong to
*
* Checks whether a device at the specified IO range, and floor is available.
*
* if a memory allocation failed. If floor 0 is checked, a reset of the ASIC is
* launched.
*/
-static struct mtd_info *doc_probe_device(void __iomem *base, int floor,
- struct device *dev)
+static struct mtd_info * __init
+doc_probe_device(struct docg3_cascade *cascade, int floor, struct device *dev)
{
int ret, bbt_nbpages;
u16 chip_id, chip_id_inv;
docg3->dev = dev;
docg3->device_id = floor;
- docg3->base = base;
+ docg3->cascade = cascade;
doc_set_device_id(docg3, docg3->device_id);
if (!floor)
doc_set_asic_mode(docg3, DOC_ASICMODE_RESET);
switch (chip_id) {
case DOC_CHIPID_G3:
doc_info("Found a G3 DiskOnChip at addr %p, floor %d\n",
- base, floor);
+ docg3->cascade->base, floor);
break;
default:
doc_err("Chip id %04x is not a DiskOnChip G3 chip\n", chip_id);
static int docg3_resume(struct platform_device *pdev)
{
int i;
+ struct docg3_cascade *cascade;
struct mtd_info **docg3_floors, *mtd;
struct docg3 *docg3;
- docg3_floors = platform_get_drvdata(pdev);
+ cascade = platform_get_drvdata(pdev);
+ docg3_floors = cascade->floors;
mtd = docg3_floors[0];
docg3 = mtd->priv;
static int docg3_suspend(struct platform_device *pdev, pm_message_t state)
{
int floor, i;
+ struct docg3_cascade *cascade;
struct mtd_info **docg3_floors, *mtd;
struct docg3 *docg3;
u8 ctrl, pwr_down;
- docg3_floors = platform_get_drvdata(pdev);
+ cascade = platform_get_drvdata(pdev);
+ docg3_floors = cascade->floors;
for (floor = 0; floor < DOC_MAX_NBFLOORS; floor++) {
mtd = docg3_floors[floor];
if (!mtd)
struct resource *ress;
void __iomem *base;
int ret, floor, found = 0;
- struct mtd_info **docg3_floors;
+ struct docg3_cascade *cascade;
ret = -ENXIO;
ress = platform_get_resource(pdev, IORESOURCE_MEM, 0);
base = ioremap(ress->start, DOC_IOSPACE_SIZE);
ret = -ENOMEM;
- docg3_floors = kzalloc(sizeof(*docg3_floors) * DOC_MAX_NBFLOORS,
- GFP_KERNEL);
- if (!docg3_floors)
+ cascade = kzalloc(sizeof(*cascade) * DOC_MAX_NBFLOORS,
+ GFP_KERNEL);
+ if (!cascade)
goto nomem1;
- docg3_bch = init_bch(DOC_ECC_BCH_M, DOC_ECC_BCH_T,
+ cascade->base = base;
+ mutex_init(&cascade->lock);
+ cascade->bch = init_bch(DOC_ECC_BCH_M, DOC_ECC_BCH_T,
DOC_ECC_BCH_PRIMPOLY);
- if (!docg3_bch)
+ if (!cascade->bch)
goto nomem2;
for (floor = 0; floor < DOC_MAX_NBFLOORS; floor++) {
- mtd = doc_probe_device(base, floor, dev);
+ mtd = doc_probe_device(cascade, floor, dev);
if (IS_ERR(mtd)) {
ret = PTR_ERR(mtd);
goto err_probe;
else
continue;
}
- docg3_floors[floor] = mtd;
+ cascade->floors[floor] = mtd;
ret = mtd_device_parse_register(mtd, part_probes, NULL, NULL,
0);
if (ret)
found++;
}
- ret = doc_register_sysfs(pdev, docg3_floors);
+ ret = doc_register_sysfs(pdev, cascade);
if (ret)
goto err_probe;
if (!found)
goto notfound;
- platform_set_drvdata(pdev, docg3_floors);
- doc_dbg_register(docg3_floors[0]->priv);
+ platform_set_drvdata(pdev, cascade);
+ doc_dbg_register(cascade->floors[0]->priv);
return 0;
notfound:
ret = -ENODEV;
dev_info(dev, "No supported DiskOnChip found\n");
err_probe:
- free_bch(docg3_bch);
+ kfree(cascade->bch);
for (floor = 0; floor < DOC_MAX_NBFLOORS; floor++)
- if (docg3_floors[floor])
- doc_release_device(docg3_floors[floor]);
+ if (cascade->floors[floor])
+ doc_release_device(cascade->floors[floor]);
nomem2:
- kfree(docg3_floors);
+ kfree(cascade);
nomem1:
iounmap(base);
noress:
*/
static int __exit docg3_release(struct platform_device *pdev)
{
- struct mtd_info **docg3_floors = platform_get_drvdata(pdev);
- struct docg3 *docg3 = docg3_floors[0]->priv;
- void __iomem *base = docg3->base;
+ struct docg3_cascade *cascade = platform_get_drvdata(pdev);
+ struct docg3 *docg3 = cascade->floors[0]->priv;
+ void __iomem *base = cascade->base;
int floor;
- doc_unregister_sysfs(pdev, docg3_floors);
+ doc_unregister_sysfs(pdev, cascade);
doc_dbg_unregister(docg3);
for (floor = 0; floor < DOC_MAX_NBFLOORS; floor++)
- if (docg3_floors[floor])
- doc_release_device(docg3_floors[floor]);
+ if (cascade->floors[floor])
+ doc_release_device(cascade->floors[floor]);
- kfree(docg3_floors);
- free_bch(docg3_bch);
+ free_bch(docg3->cascade->bch);
+ kfree(cascade);
iounmap(base);
return 0;
}
projects / linux-2.6-block.git / blobdiff