linux/drivers/mtd/maps/vmu-flash.c

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/* vmu-flash.c
* Driver for SEGA Dreamcast Visual Memory Unit
*
* Copyright (c) Adrian McMenamin 2002 - 2009
* Copyright (c) Paul Mundt 2001
*
* Licensed under version 2 of the
* GNU General Public Licence
*/
#include <linux/init.h>
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 08:04:11 +00:00
#include <linux/slab.h>
#include <linux/sched.h>
#include <linux/delay.h>
#include <linux/maple.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/map.h>
struct vmu_cache {
unsigned char *buffer; /* Cache */
unsigned int block; /* Which block was cached */
unsigned long jiffies_atc; /* When was it cached? */
int valid;
};
struct mdev_part {
struct maple_device *mdev;
int partition;
};
struct vmupart {
u16 user_blocks;
u16 root_block;
u16 numblocks;
char *name;
struct vmu_cache *pcache;
};
struct memcard {
u16 tempA;
u16 tempB;
u32 partitions;
u32 blocklen;
u32 writecnt;
u32 readcnt;
u32 removeable;
int partition;
int read;
unsigned char *blockread;
struct vmupart *parts;
struct mtd_info *mtd;
};
struct vmu_block {
unsigned int num; /* block number */
unsigned int ofs; /* block offset */
};
static struct vmu_block *ofs_to_block(unsigned long src_ofs,
struct mtd_info *mtd, int partition)
{
struct vmu_block *vblock;
struct maple_device *mdev;
struct memcard *card;
struct mdev_part *mpart;
int num;
mpart = mtd->priv;
mdev = mpart->mdev;
card = maple_get_drvdata(mdev);
if (src_ofs >= card->parts[partition].numblocks * card->blocklen)
goto failed;
num = src_ofs / card->blocklen;
if (num > card->parts[partition].numblocks)
goto failed;
vblock = kmalloc(sizeof(struct vmu_block), GFP_KERNEL);
if (!vblock)
goto failed;
vblock->num = num;
vblock->ofs = src_ofs % card->blocklen;
return vblock;
failed:
return NULL;
}
/* Maple bus callback function for reads */
static void vmu_blockread(struct mapleq *mq)
{
struct maple_device *mdev;
struct memcard *card;
mdev = mq->dev;
card = maple_get_drvdata(mdev);
/* copy the read in data */
if (unlikely(!card->blockread))
return;
memcpy(card->blockread, mq->recvbuf->buf + 12,
card->blocklen/card->readcnt);
}
/* Interface with maple bus to read blocks
* caching the results so that other parts
* of the driver can access block reads */
static int maple_vmu_read_block(unsigned int num, unsigned char *buf,
struct mtd_info *mtd)
{
struct memcard *card;
struct mdev_part *mpart;
struct maple_device *mdev;
int partition, error = 0, x, wait;
unsigned char *blockread = NULL;
struct vmu_cache *pcache;
__be32 sendbuf;
mpart = mtd->priv;
mdev = mpart->mdev;
partition = mpart->partition;
card = maple_get_drvdata(mdev);
pcache = card->parts[partition].pcache;
pcache->valid = 0;
/* prepare the cache for this block */
if (!pcache->buffer) {
pcache->buffer = kmalloc(card->blocklen, GFP_KERNEL);
if (!pcache->buffer) {
dev_err(&mdev->dev, "VMU at (%d, %d) - read fails due"
" to lack of memory\n", mdev->port,
mdev->unit);
error = -ENOMEM;
goto outB;
}
}
/*
* Reads may be phased - again the hardware spec
* supports this - though may not be any devices in
* the wild that implement it, but we will here
*/
for (x = 0; x < card->readcnt; x++) {
sendbuf = cpu_to_be32(partition << 24 | x << 16 | num);
if (atomic_read(&mdev->busy) == 1) {
wait_event_interruptible_timeout(mdev->maple_wait,
atomic_read(&mdev->busy) == 0, HZ);
if (atomic_read(&mdev->busy) == 1) {
dev_notice(&mdev->dev, "VMU at (%d, %d)"
" is busy\n", mdev->port, mdev->unit);
error = -EAGAIN;
goto outB;
}
}
atomic_set(&mdev->busy, 1);
blockread = kmalloc(card->blocklen/card->readcnt, GFP_KERNEL);
if (!blockread) {
error = -ENOMEM;
atomic_set(&mdev->busy, 0);
goto outB;
}
card->blockread = blockread;
maple_getcond_callback(mdev, vmu_blockread, 0,
MAPLE_FUNC_MEMCARD);
error = maple_add_packet(mdev, MAPLE_FUNC_MEMCARD,
MAPLE_COMMAND_BREAD, 2, &sendbuf);
/* Very long timeouts seem to be needed when box is stressed */
wait = wait_event_interruptible_timeout(mdev->maple_wait,
(atomic_read(&mdev->busy) == 0 ||
atomic_read(&mdev->busy) == 2), HZ * 3);
/*
* MTD layer does not handle hotplugging well
* so have to return errors when VMU is unplugged
* in the middle of a read (busy == 2)
*/
if (error || atomic_read(&mdev->busy) == 2) {
if (atomic_read(&mdev->busy) == 2)
error = -ENXIO;
atomic_set(&mdev->busy, 0);
card->blockread = NULL;
goto outA;
}
if (wait == 0 || wait == -ERESTARTSYS) {
card->blockread = NULL;
atomic_set(&mdev->busy, 0);
error = -EIO;
list_del_init(&(mdev->mq->list));
kfree(mdev->mq->sendbuf);
mdev->mq->sendbuf = NULL;
if (wait == -ERESTARTSYS) {
dev_warn(&mdev->dev, "VMU read on (%d, %d)"
" interrupted on block 0x%X\n",
mdev->port, mdev->unit, num);
} else
dev_notice(&mdev->dev, "VMU read on (%d, %d)"
" timed out on block 0x%X\n",
mdev->port, mdev->unit, num);
goto outA;
}
memcpy(buf + (card->blocklen/card->readcnt) * x, blockread,
card->blocklen/card->readcnt);
memcpy(pcache->buffer + (card->blocklen/card->readcnt) * x,
card->blockread, card->blocklen/card->readcnt);
card->blockread = NULL;
pcache->block = num;
pcache->jiffies_atc = jiffies;
pcache->valid = 1;
kfree(blockread);
}
return error;
outA:
kfree(blockread);
outB:
return error;
}
/* communicate with maple bus for phased writing */
static int maple_vmu_write_block(unsigned int num, const unsigned char *buf,
struct mtd_info *mtd)
{
struct memcard *card;
struct mdev_part *mpart;
struct maple_device *mdev;
int partition, error, locking, x, phaselen, wait;
__be32 *sendbuf;
mpart = mtd->priv;
mdev = mpart->mdev;
partition = mpart->partition;
card = maple_get_drvdata(mdev);
phaselen = card->blocklen/card->writecnt;
sendbuf = kmalloc(phaselen + 4, GFP_KERNEL);
if (!sendbuf) {
error = -ENOMEM;
goto fail_nosendbuf;
}
for (x = 0; x < card->writecnt; x++) {
sendbuf[0] = cpu_to_be32(partition << 24 | x << 16 | num);
memcpy(&sendbuf[1], buf + phaselen * x, phaselen);
/* wait until the device is not busy doing something else
* or 1 second - which ever is longer */
if (atomic_read(&mdev->busy) == 1) {
wait_event_interruptible_timeout(mdev->maple_wait,
atomic_read(&mdev->busy) == 0, HZ);
if (atomic_read(&mdev->busy) == 1) {
error = -EBUSY;
dev_notice(&mdev->dev, "VMU write at (%d, %d)"
"failed - device is busy\n",
mdev->port, mdev->unit);
goto fail_nolock;
}
}
atomic_set(&mdev->busy, 1);
locking = maple_add_packet(mdev, MAPLE_FUNC_MEMCARD,
MAPLE_COMMAND_BWRITE, phaselen / 4 + 2, sendbuf);
wait = wait_event_interruptible_timeout(mdev->maple_wait,
atomic_read(&mdev->busy) == 0, HZ/10);
if (locking) {
error = -EIO;
atomic_set(&mdev->busy, 0);
goto fail_nolock;
}
if (atomic_read(&mdev->busy) == 2) {
atomic_set(&mdev->busy, 0);
} else if (wait == 0 || wait == -ERESTARTSYS) {
error = -EIO;
dev_warn(&mdev->dev, "Write at (%d, %d) of block"
" 0x%X at phase %d failed: could not"
" communicate with VMU", mdev->port,
mdev->unit, num, x);
atomic_set(&mdev->busy, 0);
kfree(mdev->mq->sendbuf);
mdev->mq->sendbuf = NULL;
list_del_init(&(mdev->mq->list));
goto fail_nolock;
}
}
kfree(sendbuf);
return card->blocklen;
fail_nolock:
kfree(sendbuf);
fail_nosendbuf:
dev_err(&mdev->dev, "VMU (%d, %d): write failed\n", mdev->port,
mdev->unit);
return error;
}
/* mtd function to simulate reading byte by byte */
static unsigned char vmu_flash_read_char(unsigned long ofs, int *retval,
struct mtd_info *mtd)
{
struct vmu_block *vblock;
struct memcard *card;
struct mdev_part *mpart;
struct maple_device *mdev;
unsigned char *buf, ret;
int partition, error;
mpart = mtd->priv;
mdev = mpart->mdev;
partition = mpart->partition;
card = maple_get_drvdata(mdev);
*retval = 0;
buf = kmalloc(card->blocklen, GFP_KERNEL);
if (!buf) {
*retval = 1;
ret = -ENOMEM;
goto finish;
}
vblock = ofs_to_block(ofs, mtd, partition);
if (!vblock) {
*retval = 3;
ret = -ENOMEM;
goto out_buf;
}
error = maple_vmu_read_block(vblock->num, buf, mtd);
if (error) {
ret = error;
*retval = 2;
goto out_vblock;
}
ret = buf[vblock->ofs];
out_vblock:
kfree(vblock);
out_buf:
kfree(buf);
finish:
return ret;
}
/* mtd higher order function to read flash */
static int vmu_flash_read(struct mtd_info *mtd, loff_t from, size_t len,
size_t *retlen, u_char *buf)
{
struct maple_device *mdev;
struct memcard *card;
struct mdev_part *mpart;
struct vmu_cache *pcache;
struct vmu_block *vblock;
int index = 0, retval, partition, leftover, numblocks;
unsigned char cx;
mpart = mtd->priv;
mdev = mpart->mdev;
partition = mpart->partition;
card = maple_get_drvdata(mdev);
numblocks = card->parts[partition].numblocks;
if (from + len > numblocks * card->blocklen)
len = numblocks * card->blocklen - from;
if (len == 0)
return -EIO;
/* Have we cached this bit already? */
pcache = card->parts[partition].pcache;
do {
vblock = ofs_to_block(from + index, mtd, partition);
if (!vblock)
return -ENOMEM;
/* Have we cached this and is the cache valid and timely? */
if (pcache->valid &&
time_before(jiffies, pcache->jiffies_atc + HZ) &&
(pcache->block == vblock->num)) {
/* we have cached it, so do necessary copying */
leftover = card->blocklen - vblock->ofs;
if (vblock->ofs + len - index < card->blocklen) {
/* only a bit of this block to copy */
memcpy(buf + index,
pcache->buffer + vblock->ofs,
len - index);
index = len;
} else {
/* otherwise copy remainder of whole block */
memcpy(buf + index, pcache->buffer +
vblock->ofs, leftover);
index += leftover;
}
} else {
/*
* Not cached so read one byte -
* but cache the rest of the block
*/
cx = vmu_flash_read_char(from + index, &retval, mtd);
if (retval) {
*retlen = index;
kfree(vblock);
return cx;
}
memset(buf + index, cx, 1);
index++;
}
kfree(vblock);
} while (len > index);
*retlen = index;
return 0;
}
static int vmu_flash_write(struct mtd_info *mtd, loff_t to, size_t len,
size_t *retlen, const u_char *buf)
{
struct maple_device *mdev;
struct memcard *card;
struct mdev_part *mpart;
int index = 0, partition, error = 0, numblocks;
struct vmu_cache *pcache;
struct vmu_block *vblock;
unsigned char *buffer;
mpart = mtd->priv;
mdev = mpart->mdev;
partition = mpart->partition;
card = maple_get_drvdata(mdev);
numblocks = card->parts[partition].numblocks;
if (to + len > numblocks * card->blocklen)
len = numblocks * card->blocklen - to;
if (len == 0) {
error = -EIO;
goto failed;
}
vblock = ofs_to_block(to, mtd, partition);
if (!vblock) {
error = -ENOMEM;
goto failed;
}
buffer = kmalloc(card->blocklen, GFP_KERNEL);
if (!buffer) {
error = -ENOMEM;
goto fail_buffer;
}
do {
/* Read in the block we are to write to */
error = maple_vmu_read_block(vblock->num, buffer, mtd);
if (error)
goto fail_io;
do {
buffer[vblock->ofs] = buf[index];
vblock->ofs++;
index++;
if (index >= len)
break;
} while (vblock->ofs < card->blocklen);
/* write out new buffer */
error = maple_vmu_write_block(vblock->num, buffer, mtd);
/* invalidate the cache */
pcache = card->parts[partition].pcache;
pcache->valid = 0;
if (error != card->blocklen)
goto fail_io;
vblock->num++;
vblock->ofs = 0;
} while (len > index);
kfree(buffer);
*retlen = index;
kfree(vblock);
return 0;
fail_io:
kfree(buffer);
fail_buffer:
kfree(vblock);
failed:
dev_err(&mdev->dev, "VMU write failing with error %d\n", error);
return error;
}
static void vmu_flash_sync(struct mtd_info *mtd)
{
/* Do nothing here */
}
/* Maple bus callback function to recursively query hardware details */
static void vmu_queryblocks(struct mapleq *mq)
{
struct maple_device *mdev;
unsigned short *res;
struct memcard *card;
__be32 partnum;
struct vmu_cache *pcache;
struct mdev_part *mpart;
struct mtd_info *mtd_cur;
struct vmupart *part_cur;
int error;
mdev = mq->dev;
card = maple_get_drvdata(mdev);
res = (unsigned short *) (mq->recvbuf->buf);
card->tempA = res[12];
card->tempB = res[6];
dev_info(&mdev->dev, "VMU device at partition %d has %d user "
"blocks with a root block at %d\n", card->partition,
card->tempA, card->tempB);
part_cur = &card->parts[card->partition];
part_cur->user_blocks = card->tempA;
part_cur->root_block = card->tempB;
part_cur->numblocks = card->tempB + 1;
part_cur->name = kmalloc(12, GFP_KERNEL);
if (!part_cur->name)
goto fail_name;
sprintf(part_cur->name, "vmu%d.%d.%d",
mdev->port, mdev->unit, card->partition);
mtd_cur = &card->mtd[card->partition];
mtd_cur->name = part_cur->name;
mtd_cur->type = 8;
mtd_cur->flags = MTD_WRITEABLE|MTD_NO_ERASE;
mtd_cur->size = part_cur->numblocks * card->blocklen;
mtd_cur->erasesize = card->blocklen;
mtd_cur->_write = vmu_flash_write;
mtd_cur->_read = vmu_flash_read;
mtd_cur->_sync = vmu_flash_sync;
mtd_cur->writesize = card->blocklen;
mpart = kmalloc(sizeof(struct mdev_part), GFP_KERNEL);
if (!mpart)
goto fail_mpart;
mpart->mdev = mdev;
mpart->partition = card->partition;
mtd_cur->priv = mpart;
mtd_cur->owner = THIS_MODULE;
pcache = kzalloc(sizeof(struct vmu_cache), GFP_KERNEL);
if (!pcache)
goto fail_cache_create;
part_cur->pcache = pcache;
error = mtd_device_register(mtd_cur, NULL, 0);
if (error)
goto fail_mtd_register;
maple_getcond_callback(mdev, NULL, 0,
MAPLE_FUNC_MEMCARD);
/*
* Set up a recursive call to the (probably theoretical)
* second or more partition
*/
if (++card->partition < card->partitions) {
partnum = cpu_to_be32(card->partition << 24);
maple_getcond_callback(mdev, vmu_queryblocks, 0,
MAPLE_FUNC_MEMCARD);
maple_add_packet(mdev, MAPLE_FUNC_MEMCARD,
MAPLE_COMMAND_GETMINFO, 2, &partnum);
}
return;
fail_mtd_register:
dev_err(&mdev->dev, "Could not register maple device at (%d, %d)"
"error is 0x%X\n", mdev->port, mdev->unit, error);
for (error = 0; error <= card->partition; error++) {
kfree(((card->parts)[error]).pcache);
((card->parts)[error]).pcache = NULL;
}
fail_cache_create:
fail_mpart:
for (error = 0; error <= card->partition; error++) {
kfree(((card->mtd)[error]).priv);
((card->mtd)[error]).priv = NULL;
}
maple_getcond_callback(mdev, NULL, 0,
MAPLE_FUNC_MEMCARD);
kfree(part_cur->name);
fail_name:
return;
}
/* Handles very basic info about the flash, queries for details */
static int vmu_connect(struct maple_device *mdev)
{
unsigned long test_flash_data, basic_flash_data;
int c, error;
struct memcard *card;
u32 partnum = 0;
test_flash_data = be32_to_cpu(mdev->devinfo.function);
/* Need to count how many bits are set - to find out which
* function_data element has details of the memory card
*/
c = hweight_long(test_flash_data);
basic_flash_data = be32_to_cpu(mdev->devinfo.function_data[c - 1]);
card = kmalloc(sizeof(struct memcard), GFP_KERNEL);
if (!card) {
error = -ENOMEM;
goto fail_nomem;
}
card->partitions = (basic_flash_data >> 24 & 0xFF) + 1;
card->blocklen = ((basic_flash_data >> 16 & 0xFF) + 1) << 5;
card->writecnt = basic_flash_data >> 12 & 0xF;
card->readcnt = basic_flash_data >> 8 & 0xF;
card->removeable = basic_flash_data >> 7 & 1;
card->partition = 0;
/*
* Not sure there are actually any multi-partition devices in the
* real world, but the hardware supports them, so, so will we
*/
card->parts = kmalloc(sizeof(struct vmupart) * card->partitions,
GFP_KERNEL);
if (!card->parts) {
error = -ENOMEM;
goto fail_partitions;
}
card->mtd = kmalloc(sizeof(struct mtd_info) * card->partitions,
GFP_KERNEL);
if (!card->mtd) {
error = -ENOMEM;
goto fail_mtd_info;
}
maple_set_drvdata(mdev, card);
/*
* We want to trap meminfo not get cond
* so set interval to zero, but rely on maple bus
* driver to pass back the results of the meminfo
*/
maple_getcond_callback(mdev, vmu_queryblocks, 0,
MAPLE_FUNC_MEMCARD);
/* Make sure we are clear to go */
if (atomic_read(&mdev->busy) == 1) {
wait_event_interruptible_timeout(mdev->maple_wait,
atomic_read(&mdev->busy) == 0, HZ);
if (atomic_read(&mdev->busy) == 1) {
dev_notice(&mdev->dev, "VMU at (%d, %d) is busy\n",
mdev->port, mdev->unit);
error = -EAGAIN;
goto fail_device_busy;
}
}
atomic_set(&mdev->busy, 1);
/*
* Set up the minfo call: vmu_queryblocks will handle
* the information passed back
*/
error = maple_add_packet(mdev, MAPLE_FUNC_MEMCARD,
MAPLE_COMMAND_GETMINFO, 2, &partnum);
if (error) {
dev_err(&mdev->dev, "Could not lock VMU at (%d, %d)"
" error is 0x%X\n", mdev->port, mdev->unit, error);
goto fail_mtd_info;
}
return 0;
fail_device_busy:
kfree(card->mtd);
fail_mtd_info:
kfree(card->parts);
fail_partitions:
kfree(card);
fail_nomem:
return error;
}
static void vmu_disconnect(struct maple_device *mdev)
{
struct memcard *card;
struct mdev_part *mpart;
int x;
mdev->callback = NULL;
card = maple_get_drvdata(mdev);
for (x = 0; x < card->partitions; x++) {
mpart = ((card->mtd)[x]).priv;
mpart->mdev = NULL;
mtd_device_unregister(&((card->mtd)[x]));
kfree(((card->parts)[x]).name);
}
kfree(card->parts);
kfree(card->mtd);
kfree(card);
}
/* Callback to handle eccentricities of both mtd subsystem
* and general flakyness of Dreamcast VMUs
*/
static int vmu_can_unload(struct maple_device *mdev)
{
struct memcard *card;
int x;
struct mtd_info *mtd;
card = maple_get_drvdata(mdev);
for (x = 0; x < card->partitions; x++) {
mtd = &((card->mtd)[x]);
if (mtd->usecount > 0)
return 0;
}
return 1;
}
#define ERRSTR "VMU at (%d, %d) file error -"
static void vmu_file_error(struct maple_device *mdev, void *recvbuf)
{
enum maple_file_errors error = ((int *)recvbuf)[1];
switch (error) {
case MAPLE_FILEERR_INVALID_PARTITION:
dev_notice(&mdev->dev, ERRSTR " invalid partition number\n",
mdev->port, mdev->unit);
break;
case MAPLE_FILEERR_PHASE_ERROR:
dev_notice(&mdev->dev, ERRSTR " phase error\n",
mdev->port, mdev->unit);
break;
case MAPLE_FILEERR_INVALID_BLOCK:
dev_notice(&mdev->dev, ERRSTR " invalid block number\n",
mdev->port, mdev->unit);
break;
case MAPLE_FILEERR_WRITE_ERROR:
dev_notice(&mdev->dev, ERRSTR " write error\n",
mdev->port, mdev->unit);
break;
case MAPLE_FILEERR_INVALID_WRITE_LENGTH:
dev_notice(&mdev->dev, ERRSTR " invalid write length\n",
mdev->port, mdev->unit);
break;
case MAPLE_FILEERR_BAD_CRC:
dev_notice(&mdev->dev, ERRSTR " bad CRC\n",
mdev->port, mdev->unit);
break;
default:
dev_notice(&mdev->dev, ERRSTR " 0x%X\n",
mdev->port, mdev->unit, error);
}
}
static int probe_maple_vmu(struct device *dev)
{
int error;
struct maple_device *mdev = to_maple_dev(dev);
struct maple_driver *mdrv = to_maple_driver(dev->driver);
mdev->can_unload = vmu_can_unload;
mdev->fileerr_handler = vmu_file_error;
mdev->driver = mdrv;
error = vmu_connect(mdev);
if (error)
return error;
return 0;
}
static int remove_maple_vmu(struct device *dev)
{
struct maple_device *mdev = to_maple_dev(dev);
vmu_disconnect(mdev);
return 0;
}
static struct maple_driver vmu_flash_driver = {
.function = MAPLE_FUNC_MEMCARD,
.drv = {
.name = "Dreamcast_visual_memory",
.probe = probe_maple_vmu,
.remove = remove_maple_vmu,
},
};
static int __init vmu_flash_map_init(void)
{
return maple_driver_register(&vmu_flash_driver);
}
static void __exit vmu_flash_map_exit(void)
{
maple_driver_unregister(&vmu_flash_driver);
}
module_init(vmu_flash_map_init);
module_exit(vmu_flash_map_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Adrian McMenamin");
MODULE_DESCRIPTION("Flash mapping for Sega Dreamcast visual memory");