[PATCH RFC] sh: maple: Add support for SEGA Dreamcast VMU and

Adrian McMenamin
2009-01-28T23:57:49Z

Rework the maple bus driver to support block reads and writes, while
also cleaning up the code and aiming for a consistent namespace for
functions.

Changes to the maple.h header file to support block reads and writes.

Signed-off-by: Adrian McMenamin <adrian@mcmen.demon.co.uk>
---

diff --git a/drivers/sh/maple/maple.c b/drivers/sh/maple/maple.c
index 63f0de2..4d9b8b3 100644
--- a/drivers/sh/maple/maple.c
+++ b/drivers/sh/maple/maple.c
@@ -1,16 +1,10 @@
/*
* Core maple bus functionality
*
- * Copyright (C) 2007, 2008 Adrian McMenamin
+ * Copyright (C) 2007 - 2009 Adrian McMenamin
* Copyright (C) 2001 - 2008 Paul Mundt
- *
- * Based on 2.4 code by:
- *
- * Copyright (C) 2000-2001 YAEGASHI Takeshi
+ * Copyright (C) 2000 - 2001 YAEGASHI Takeshi
* Copyright (C) 2001 M. R. Brown
- * Copyright (C) 2001 Paul Mundt
- *
- * and others.
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
@@ -32,7 +26,7 @@
#include <mach/dma.h>
#include <mach/sysasic.h>

-MODULE_AUTHOR("Yaegashi Takeshi, Paul Mundt, M. R. Brown, Adrian McMenamin");
+MODULE_AUTHOR("Adrian McMenamin <adrian@mcmen.demon.co.uk>");
MODULE_DESCRIPTION("Maple bus driver for Dreamcast");
MODULE_LICENSE("GPL v2");
MODULE_SUPPORTED_DEVICE("{{SEGA, Dreamcast/Maple}}");
@@ -49,7 +43,7 @@ static LIST_HEAD(maple_sentq);
/* mutex to protect queue of waiting packets */
static DEFINE_MUTEX(maple_wlist_lock);

-static struct maple_driver maple_dummy_driver;
+static struct maple_driver maple_unsupported_device;
static struct device maple_bus;
static int subdevice_map[MAPLE_PORTS];
static unsigned long *maple_sendbuf, *maple_sendptr, *maple_lastptr;
@@ -62,8 +56,9 @@ struct maple_device_specify {
int unit;
};

-static bool checked[4];
-static struct maple_device *baseunits[4];
+static bool checked[MAPLE_PORTS];
+static bool empty[MAPLE_PORTS];
+static struct maple_device *baseunits[MAPLE_PORTS];

/**
* maple_driver_register - register a maple driver
@@ -97,7 +92,7 @@ void maple_driver_unregister(struct maple_driver *drv)
EXPORT_SYMBOL_GPL(maple_driver_unregister);

/* set hardware registers to enable next round of dma */
-static void maplebus_dma_reset(void)
+static void maple_dma_reset(void)
{
ctrl_outl(MAPLE_MAGIC, MAPLE_RESET);
/* set trig type to 0 for software trigger, 1 for hardware (VBLANK) */
@@ -134,21 +129,16 @@ static void maple_release_device(struct device *dev)
{
struct maple_device *mdev;
struct mapleq *mq;
- if (!dev)
- return;
+
mdev = to_maple_dev(dev);
mq = mdev->mq;
- if (mq) {
- if (mq->recvbufdcsp)
- kmem_cache_free(maple_queue_cache, mq->recvbufdcsp);
- kfree(mq);
- mq = NULL;
- }
+ kmem_cache_free(maple_queue_cache, mq->recvbuf);
+ kfree(mq);
kfree(mdev);
}

/**
- * maple_add_packet - add a single instruction to the queue
+ * maple_add_packet - add a single instruction to the maple bus queue
* @mdev: maple device
* @function: function on device being queried
* @command: maple command to add
@@ -158,68 +148,12 @@ static void maple_release_device(struct device *dev)
int maple_add_packet(struct maple_device *mdev, u32 function, u32 command,
size_t length, void *data)
{
- int locking, ret = 0;
- void *sendbuf = NULL;
-
- mutex_lock(&maple_wlist_lock);
- /* bounce if device already locked */
- locking = mutex_is_locked(&mdev->mq->mutex);
- if (locking) {
- ret = -EBUSY;
- goto out;
- }
-
- mutex_lock(&mdev->mq->mutex);
-
- if (length) {
- sendbuf = kmalloc(length * 4, GFP_KERNEL);
- if (!sendbuf) {
- mutex_unlock(&mdev->mq->mutex);
- ret = -ENOMEM;
- goto out;
- }
- ((__be32 *)sendbuf)[0] = cpu_to_be32(function);
- }
-
- mdev->mq->command = command;
- mdev->mq->length = length;
- if (length > 1)
- memcpy(sendbuf + 4, data, (length - 1) * 4);
- mdev->mq->sendbuf = sendbuf;
-
- list_add(&mdev->mq->list, &maple_waitq);
-out:
- mutex_unlock(&maple_wlist_lock);
- return ret;
-}
-EXPORT_SYMBOL_GPL(maple_add_packet);
-
-/**
- * maple_add_packet_sleeps - add a single instruction to the queue
- * @mdev: maple device
- * @function: function on device being queried
- * @command: maple command to add
- * @length: length of command string (in 32 bit words)
- * @data: remainder of command string
- *
- * Same as maple_add_packet(), but waits for the lock to become free.
- */
-int maple_add_packet_sleeps(struct maple_device *mdev, u32 function,
- u32 command, size_t length, void *data)
-{
- int locking, ret = 0;
- void *sendbuf = NULL;
-
- locking = mutex_lock_interruptible(&mdev->mq->mutex);
- if (locking) {
- ret = -EIO;
- goto out;
- }
+ int ret = 0;
+ void *sendbuf;

+ sendbuf = kzalloc(length * 4, GFP_KERNEL);
if (length) {
- sendbuf = kmalloc(length * 4, GFP_KERNEL);
if (!sendbuf) {
- mutex_unlock(&mdev->mq->mutex);
ret = -ENOMEM;
goto out;
}
@@ -233,38 +167,33 @@ int maple_add_packet_sleeps(struct maple_device *mdev, u32 function,
mdev->mq->sendbuf = sendbuf;

mutex_lock(&maple_wlist_lock);
- list_add(&mdev->mq->list, &maple_waitq);
+ list_add_tail(&mdev->mq->list, &maple_waitq);
mutex_unlock(&maple_wlist_lock);
out:
return ret;
}
-EXPORT_SYMBOL_GPL(maple_add_packet_sleeps);
+EXPORT_SYMBOL_GPL(maple_add_packet);

static struct mapleq *maple_allocq(struct maple_device *mdev)
{
struct mapleq *mq;

- mq = kmalloc(sizeof(*mq), GFP_KERNEL);
+ mq = kzalloc(sizeof(*mq), GFP_KERNEL);
if (!mq)
goto failed_nomem;

mq->dev = mdev;
- mq->recvbufdcsp = kmem_cache_zalloc(maple_queue_cache, GFP_KERNEL);
- mq->recvbuf = (void *) P2SEGADDR(mq->recvbufdcsp);
+ mq->recvbuf = kmem_cache_zalloc(maple_queue_cache, GFP_KERNEL);
if (!mq->recvbuf)
goto failed_p2;
- /*
- * most devices do not need the mutex - but
- * anything that injects block reads or writes
- * will rely on it
- */
- mutex_init(&mq->mutex);
+ mq->recvbuf->buf = (void *)P2SEGADDR(&((mq->recvbuf->bufx)[0]));

return mq;

failed_p2:
kfree(mq);
failed_nomem:
+ printk(KERN_INFO "maple: could not allocate memory\n");
return NULL;
}

@@ -272,12 +201,16 @@ static struct maple_device *maple_alloc_dev(int port, int unit)
{
struct maple_device *mdev;

+ /* zero this out to avoid kobj subsystem
+ * thinking it has already been registered */
+
mdev = kzalloc(sizeof(*mdev), GFP_KERNEL);
if (!mdev)
return NULL;

mdev->port = port;
mdev->unit = unit;
+
mdev->mq = maple_allocq(mdev);

if (!mdev->mq) {
@@ -286,19 +219,18 @@ static struct maple_device *maple_alloc_dev(int port, int unit)
}
mdev->dev.bus = &maple_bus_type;
mdev->dev.parent = &maple_bus;
+ init_waitqueue_head(&mdev->maple_wait);
+ mdev->busy = 0;
+ mdev->callback = NULL;
+ mdev->canunload = NULL;
+ mdev->fileerrhandler = NULL;
return mdev;
}

static void maple_free_dev(struct maple_device *mdev)
{
- if (!mdev)
- return;
- if (mdev->mq) {
- if (mdev->mq->recvbufdcsp)
- kmem_cache_free(maple_queue_cache,
- mdev->mq->recvbufdcsp);
- kfree(mdev->mq);
- }
+ kmem_cache_free(maple_queue_cache, mdev->mq->recvbuf);
+ kfree(mdev->mq);
kfree(mdev);
}

@@ -320,7 +252,7 @@ static void maple_build_block(struct mapleq *mq)
maple_lastptr = maple_sendptr;

*maple_sendptr++ = (port << 16) | len | 0x80000000;
- *maple_sendptr++ = PHYSADDR(mq->recvbuf);
+ *maple_sendptr++ = PHYSADDR(mq->recvbuf->buf);
*maple_sendptr++ mq->command | (to << 8) | (from << 16) | (len << 24);
while (len-- > 0)
@@ -333,20 +265,28 @@ static void maple_send(void)
int i, maple_packets = 0;
struct mapleq *mq, *nmq;

- if (!list_empty(&maple_sentq))
+ if (!maple_dma_done())
return;
+
+ /* disable DMA */
+ ctrl_outl(0, MAPLE_ENABLE);
+
+ if (!list_empty(&maple_sentq))
+ goto finish;
+
mutex_lock(&maple_wlist_lock);
- if (list_empty(&maple_waitq) || !maple_dma_done()) {
+ if (list_empty(&maple_waitq)) {
mutex_unlock(&maple_wlist_lock);
- return;
+ goto finish;
}
- mutex_unlock(&maple_wlist_lock);
+
maple_lastptr = maple_sendbuf;
maple_sendptr = maple_sendbuf;
- mutex_lock(&maple_wlist_lock);
+
list_for_each_entry_safe(mq, nmq, &maple_waitq, list) {
maple_build_block(mq);
- list_move(&mq->list, &maple_sentq);
+ list_del_init(&mq->list);
+ list_add_tail(&mq->list, &maple_sentq);
if (maple_packets++ > MAPLE_MAXPACKETS)
break;
}
@@ -356,10 +296,13 @@ static void maple_send(void)
dma_cache_sync(0, maple_sendbuf + i * PAGE_SIZE,
PAGE_SIZE, DMA_BIDIRECTIONAL);
}
+
+finish:
+ maple_dma_reset();
}

/* check if there is a driver registered likely to match this device */
-static int check_matching_maple_driver(struct device_driver *driver,
+static int maple_check_matching_driver(struct device_driver *driver,
void *devptr)
{
struct maple_driver *maple_drv;
@@ -374,10 +317,7 @@ static int check_matching_maple_driver(struct device_driver *driver,

static void maple_detach_driver(struct maple_device *mdev)
{
- if (!mdev)
- return;
device_unregister(&mdev->dev);
- mdev = NULL;
}

/* process initial MAPLE_COMMAND_DEVINFO for each device or port */
@@ -385,9 +325,9 @@ static void maple_attach_driver(struct maple_device *mdev)
{
char *p, *recvbuf;
unsigned long function;
- int matched, retval;
+ int matched;

- recvbuf = mdev->mq->recvbuf;
+ recvbuf = mdev->mq->recvbuf->buf;
/* copy the data as individual elements in
* case of memory optimisation */
memcpy(&mdev->devinfo.function, recvbuf + 4, 4);
@@ -423,7 +363,7 @@ static void maple_attach_driver(struct maple_device *mdev)
if (function > 0x200) {
/* Do this silently - as not a real device */
function = 0;
- mdev->driver = &maple_dummy_driver;
+ mdev->driver = &maple_unsupported_device;
sprintf(mdev->dev.bus_id, "%d:0.port", mdev->port);
} else {
printk(KERN_INFO
@@ -432,24 +372,25 @@ static void maple_attach_driver(struct maple_device *mdev)

matched bus_for_each_drv(&maple_bus_type, NULL, mdev,
- check_matching_maple_driver);
+ maple_check_matching_driver);

if (matched = 0) {
/* Driver does not exist yet */
printk(KERN_INFO
"No maple driver found.\n");
- mdev->driver = &maple_dummy_driver;
+ mdev->driver = &maple_unsupported_device;
}
sprintf(mdev->dev.bus_id, "%d:0%d.%lX", mdev->port,
mdev->unit, function);
}
+
mdev->function = function;
mdev->dev.release = &maple_release_device;
- retval = device_register(&mdev->dev);
- if (retval) {
+
+ if (device_register(&mdev->dev)) {
printk(KERN_INFO
- "Maple bus: Attempt to register device"
- " (%x, %x) failed.\n",
+ "Maple bus: Attempt to register device"
+ " (%x, %x) failed.\n",
mdev->port, mdev->unit);
maple_free_dev(mdev);
mdev = NULL;
@@ -462,7 +403,7 @@ static void maple_attach_driver(struct maple_device *mdev)
* port and unit then return 1 - allows identification
* of which devices need to be attached or detached
*/
-static int detach_maple_device(struct device *device, void *portptr)
+static int check_maple_device(struct device *device, void *portptr)
{
struct maple_device_specify *ds;
struct maple_device *mdev;
@@ -477,21 +418,25 @@ static int detach_maple_device(struct device *device, void *portptr)
static int setup_maple_commands(struct device *device, void *ignored)
{
int add;
- struct maple_device *maple_dev = to_maple_dev(device);
-
- if ((maple_dev->interval > 0)
- && time_after(jiffies, maple_dev->when)) {
- /* bounce if we cannot lock */
- add = maple_add_packet(maple_dev,
- be32_to_cpu(maple_dev->devinfo.function),
+ struct maple_device *mdev = to_maple_dev(device);
+ if ((mdev->interval > 0)
+ && time_after(jiffies, mdev->when)) {
+ /* bounce if we cannot add */
+ add = maple_add_packet(mdev,
+ be32_to_cpu(mdev->devinfo.function),
MAPLE_COMMAND_GETCOND, 1, NULL);
if (!add)
- maple_dev->when = jiffies + maple_dev->interval;
+ mdev->when = jiffies + mdev->interval;
} else {
if (time_after(jiffies, maple_pnp_time))
- /* This will also bounce */
- maple_add_packet(maple_dev, 0,
- MAPLE_COMMAND_DEVINFO, 0, NULL);
+ /* Ensure we don't have block reads and devinfo
+ * calls interfering with one another - so flag the
+ * device as busy */
+ if (mdev->busy = 0) {
+ mdev->busy = 1;
+ maple_add_packet(mdev, 0,
+ MAPLE_COMMAND_DEVINFO, 0, NULL);
+ }
}
return 0;
}
@@ -499,29 +444,50 @@ static int setup_maple_commands(struct device *device, void *ignored)
/* VBLANK bottom half - implemented via workqueue */
static void maple_vblank_handler(struct work_struct *work)
{
- if (!list_empty(&maple_sentq) || !maple_dma_done())
+ int x, locking;
+ struct maple_device *mdev;
+
+ if (!maple_dma_done())
return;

ctrl_outl(0, MAPLE_ENABLE);

+ if (!list_empty(&maple_sentq))
+ goto finish;
+
+ /*
+ * Set up essential commands - to fetch data and
+ * check devices are still present
+ */
bus_for_each_dev(&maple_bus_type, NULL, NULL,
- setup_maple_commands);
+ setup_maple_commands);
+
+ if (time_after(jiffies, maple_pnp_time)) {
+ /*
+ * Scan the empty ports - bus is flakey and may have
+ * mis-reported emptyness
+ */
+ for (x = 0; x < MAPLE_PORTS; x++) {
+ if (checked[x] && empty[x]) {
+ mdev = baseunits[x];
+ if (!mdev)
+ break;
+ mdev->busy = 1;
+ locking = maple_add_packet(mdev, 0,
+ MAPLE_COMMAND_DEVINFO, 0, NULL);
+ if (!locking)
+ break;
+ }
+ }

- if (time_after(jiffies, maple_pnp_time))
maple_pnp_time = jiffies + MAPLE_PNP_INTERVAL;
-
- mutex_lock(&maple_wlist_lock);
- if (!list_empty(&maple_waitq) && list_empty(&maple_sentq)) {
- mutex_unlock(&maple_wlist_lock);
- maple_send();
- } else {
- mutex_unlock(&maple_wlist_lock);
}

- maplebus_dma_reset();
+finish:
+ maple_send();
}

-/* handle devices added via hotplugs - placing them on queue for DEVINFO*/
+/* handle devices added via hotplugs - placing them on queue for DEVINFO */
static void maple_map_subunits(struct maple_device *mdev, int submask)
{
int retval, k, devcheck;
@@ -533,7 +499,7 @@ static void maple_map_subunits(struct maple_device *mdev, int submask)
ds.unit = k + 1;
retval bus_for_each_dev(&maple_bus_type, NULL, &ds,
- detach_maple_device);
+ check_maple_device);
if (retval) {
submask = submask >> 1;
continue;
@@ -543,6 +509,7 @@ static void maple_map_subunits(struct maple_device *mdev, int submask)
mdev_add = maple_alloc_dev(mdev->port, k + 1);
if (!mdev_add)
return;
+ mdev_add->busy = 1;
maple_add_packet(mdev_add, 0, MAPLE_COMMAND_DEVINFO,
0, NULL);
/* mark that we are checking sub devices */
@@ -564,27 +531,46 @@ static void maple_clean_submap(struct maple_device *mdev)
}

/* handle empty port or hotplug removal */
-static void maple_response_none(struct maple_device *mdev,
- struct mapleq *mq)
+static void maple_response_none(struct maple_device *mdev)
{
- if (mdev->unit != 0) {
- list_del(&mq->list);
- maple_clean_submap(mdev);
+ maple_clean_submap(mdev);
+
+ if (likely(mdev->unit != 0)) {
+ /*
+ * Block devices play up
+ * and give the impression they have
+ * been removed even when still in place or
+ * trip the mtd layer when they have
+ * really gone - this code traps that eventuality
+ * and ensures we aren't overloaded with useless
+ * error messages
+ */
+ if (mdev->canunload) {
+ if (!mdev->canunload(mdev)) {
+ mdev->busy = 2;
+ wake_up(&mdev->maple_wait);
+ return;
+ }
+ }
+
printk(KERN_INFO
- "Maple bus device detaching at (%d, %d)\n",
- mdev->port, mdev->unit);
+ "Maple bus device detaching at (%d, %d)\n",
+ mdev->port, mdev->unit);
maple_detach_driver(mdev);
return;
- }
- if (!started || !fullscan) {
- if (checked[mdev->port] = false) {
- checked[mdev->port] = true;
- printk(KERN_INFO "No maple devices attached"
- " to port %d\n", mdev->port);
+ } else {
+ if (!started || !fullscan) {
+ if (checked[mdev->port] = false) {
+ checked[mdev->port] = true;
+ empty[mdev->port] = true;
+ printk(KERN_INFO "No maple devices attached"
+ " to port %d\n", mdev->port);
+ }
+ return;
}
- return;
}
- maple_clean_submap(mdev);
+ /* Some hardware devices generate false detach messages on unit 0 */
+ mdev->busy = 0;
}

/* preprocess hotplugs or scans */
@@ -599,8 +585,11 @@ static void maple_response_devinfo(struct maple_device *mdev,
} else {
if (mdev->unit != 0)
maple_attach_driver(mdev);
+ if (mdev->unit = 0) {
+ empty[mdev->port] = false;
+ maple_attach_driver(mdev);
+ }
}
- return;
}
if (mdev->unit = 0) {
submask = recvbuf[2] & 0x1F;
@@ -611,6 +600,16 @@ static void maple_response_devinfo(struct maple_device *mdev,
}
}

+static void maple_response_fileerr(struct maple_device *mdev, void *recvbuf)
+{
+ if (mdev->fileerrhandler) {
+ mdev->fileerrhandler(mdev, recvbuf);
+ return;
+ } else
+ printk(KERN_INFO "maple: device (%d, %d) reports file error %d\n",
+ mdev->port, mdev->unit, ((int *)recvbuf)[1]);
+}
+
static void maple_port_rescan(void)
{
int i;
@@ -621,12 +620,6 @@ static void maple_port_rescan(void)
if (checked[i] = false) {
fullscan = 0;
mdev = baseunits[i];
- /*
- * test lock in case scan has failed
- * but device is still locked
- */
- if (mutex_is_locked(&mdev->mq->mutex))
- mutex_unlock(&mdev->mq->mutex);
maple_add_packet(mdev, 0, MAPLE_COMMAND_DEVINFO,
0, NULL);
}
@@ -637,7 +630,7 @@ static void maple_port_rescan(void)
static void maple_dma_handler(struct work_struct *work)
{
struct mapleq *mq, *nmq;
- struct maple_device *dev;
+ struct maple_device *mdev;
char *recvbuf;
enum maple_code code;

@@ -646,43 +639,53 @@ static void maple_dma_handler(struct work_struct *work)
ctrl_outl(0, MAPLE_ENABLE);
if (!list_empty(&maple_sentq)) {
list_for_each_entry_safe(mq, nmq, &maple_sentq, list) {
- recvbuf = mq->recvbuf;
+ recvbuf = mq->recvbuf->buf;
code = recvbuf[0];
- dev = mq->dev;
+ mdev = mq->dev;
kfree(mq->sendbuf);
- mutex_unlock(&mq->mutex);
list_del_init(&mq->list);
-
switch (code) {
case MAPLE_RESPONSE_NONE:
- maple_response_none(dev, mq);
+ maple_response_none(mdev);
break;

case MAPLE_RESPONSE_DEVINFO:
- maple_response_devinfo(dev, recvbuf);
+ maple_response_devinfo(mdev, recvbuf);
+ mdev->busy = 0;
break;

case MAPLE_RESPONSE_DATATRF:
- if (dev->callback)
- dev->callback(mq);
+ if (mdev->callback)
+ mdev->callback(mq);
+ mdev->busy = 0;
+ wake_up(&mdev->maple_wait);
break;

case MAPLE_RESPONSE_FILEERR:
+ maple_response_fileerr(mdev, recvbuf);
+ mdev->busy = 0;
+ wake_up(&mdev->maple_wait);
+ break;
+
case MAPLE_RESPONSE_AGAIN:
case MAPLE_RESPONSE_BADCMD:
case MAPLE_RESPONSE_BADFUNC:
- printk(KERN_DEBUG
+ printk(KERN_INFO
"Maple non-fatal error 0x%X\n",
code);
+ mdev->busy = 0;
break;

case MAPLE_RESPONSE_ALLINFO:
- printk(KERN_DEBUG
+ printk(KERN_INFO
"Maple - extended device information"
" not supported\n");
+ mdev->busy = 0;
break;

case MAPLE_RESPONSE_OK:
+ mdev->busy = 0;
+ wake_up(&mdev->maple_wait);
break;

default:
@@ -699,20 +702,19 @@ static void maple_dma_handler(struct work_struct *work)
if (!fullscan)
maple_port_rescan();
/* mark that we have been through the first scan */
- if (started = 0)
- started = 1;
+ started = 1;
}
- maplebus_dma_reset();
+ maple_send();
}

-static irqreturn_t maplebus_dma_interrupt(int irq, void *dev_id)
+static irqreturn_t maple_dma_interrupt(int irq, void *dev_id)
{
/* Load everything into the bottom half */
schedule_work(&maple_dma_process);
return IRQ_HANDLED;
}

-static irqreturn_t maplebus_vblank_interrupt(int irq, void *dev_id)
+static irqreturn_t maple_vblank_interrupt(int irq, void *dev_id)
{
schedule_work(&maple_vblank_process);
return IRQ_HANDLED;
@@ -720,14 +722,14 @@ static irqreturn_t maplebus_vblank_interrupt(int irq, void *dev_id)

static int maple_set_dma_interrupt_handler(void)
{
- return request_irq(HW_EVENT_MAPLE_DMA, maplebus_dma_interrupt,
- IRQF_SHARED, "maple bus DMA", &maple_dummy_driver);
+ return request_irq(HW_EVENT_MAPLE_DMA, maple_dma_interrupt,
+ IRQF_SHARED, "maple bus DMA", &maple_unsupported_device);
}

static int maple_set_vblank_interrupt_handler(void)
{
- return request_irq(HW_EVENT_VSYNC, maplebus_vblank_interrupt,
- IRQF_SHARED, "maple bus VBLANK", &maple_dummy_driver);
+ return request_irq(HW_EVENT_VSYNC, maple_vblank_interrupt,
+ IRQF_SHARED, "maple bus VBLANK", &maple_unsupported_device);
}

static int maple_get_dma_buffer(void)
@@ -740,7 +742,7 @@ static int maple_get_dma_buffer(void)
return 0;
}

-static int match_maple_bus_driver(struct device *devptr,
+static int maple_match_bus_driver(struct device *devptr,
struct device_driver *drvptr)
{
struct maple_driver *maple_drv = to_maple_driver(drvptr);
@@ -765,16 +767,18 @@ static void maple_bus_release(struct device *dev)
{
}

-static struct maple_driver maple_dummy_driver = {
+static struct maple_driver maple_unsupported_device = {
.drv = {
- .name = "maple_dummy_driver",
+ .name = "maple_unsupported_device",
.bus = &maple_bus_type,
},
};
-
+/**
+ * maple_bus_type - core maple bus structure
+ */
struct bus_type maple_bus_type = {
.name = "maple",
- .match = match_maple_bus_driver,
+ .match = maple_match_bus_driver,
.uevent = maple_bus_uevent,
};
EXPORT_SYMBOL_GPL(maple_bus_type);
@@ -788,7 +792,8 @@ static int __init maple_bus_init(void)
{
int retval, i;
struct maple_device *mdev[MAPLE_PORTS];
- ctrl_outl(0, MAPLE_STATE);
+
+ ctrl_outl(0, MAPLE_ENABLE);

retval = device_register(&maple_bus);
if (retval)
@@ -798,7 +803,7 @@ static int __init maple_bus_init(void)
if (retval)
goto cleanup_device;

- retval = driver_register(&maple_dummy_driver.drv);
+ retval = driver_register(&maple_unsupported_device.drv);
if (retval)
goto cleanup_bus;

@@ -825,9 +830,7 @@ static int __init maple_bus_init(void)
goto cleanup_irq;
}

- maple_queue_cache - kmem_cache_create("maple_queue_cache", 0x400, 0,
- SLAB_HWCACHE_ALIGN, NULL);
+ maple_queue_cache = KMEM_CACHE(maple_buffer, SLAB_HWCACHE_ALIGN);

if (!maple_queue_cache)
goto cleanup_bothirqs;
@@ -838,6 +841,7 @@ static int __init maple_bus_init(void)
/* setup maple ports */
for (i = 0; i < MAPLE_PORTS; i++) {
checked[i] = false;
+ empty[i] = false;
mdev[i] = maple_alloc_dev(i, 0);
baseunits[i] = mdev[i];
if (!mdev[i]) {
@@ -845,15 +849,14 @@ static int __init maple_bus_init(void)
maple_free_dev(mdev[i]);
goto cleanup_cache;
}
+ mdev[i]->busy = 1;
maple_add_packet(mdev[i], 0, MAPLE_COMMAND_DEVINFO, 0, NULL);
subdevice_map[i] = 0;
}

- /* setup maplebus hardware */
- maplebus_dma_reset();
- /* initial detection */
+ maple_pnp_time = jiffies + HZ;
+ /* prepare initial queue */
maple_send();
- maple_pnp_time = jiffies;
printk(KERN_INFO "Maple bus core now registered.\n");

return 0;
@@ -871,7 +874,7 @@ cleanup_dma:
free_pages((unsigned long) maple_sendbuf, MAPLE_DMA_PAGES);

cleanup_basic:
- driver_unregister(&maple_dummy_driver.drv);
+ driver_unregister(&maple_unsupported_device.drv);

cleanup_bus:
bus_unregister(&maple_bus_type);
diff --git a/include/linux/maple.h b/include/linux/maple.h
index c23d3f5..7852e8e 100644
--- a/include/linux/maple.h
+++ b/include/linux/maple.h
@@ -8,33 +8,49 @@ extern struct bus_type maple_bus_type;

/* Maple Bus command and response codes */
enum maple_code {
- MAPLE_RESPONSE_FILEERR = -5,
- MAPLE_RESPONSE_AGAIN = -4, /* request should be retransmitted */
- MAPLE_RESPONSE_BADCMD = -3,
- MAPLE_RESPONSE_BADFUNC = -2,
- MAPLE_RESPONSE_NONE = -1, /* unit didn't respond at all */
- MAPLE_COMMAND_DEVINFO = 1,
- MAPLE_COMMAND_ALLINFO = 2,
- MAPLE_COMMAND_RESET = 3,
- MAPLE_COMMAND_KILL = 4,
- MAPLE_RESPONSE_DEVINFO = 5,
- MAPLE_RESPONSE_ALLINFO = 6,
- MAPLE_RESPONSE_OK = 7,
- MAPLE_RESPONSE_DATATRF = 8,
- MAPLE_COMMAND_GETCOND = 9,
- MAPLE_COMMAND_GETMINFO = 10,
- MAPLE_COMMAND_BREAD = 11,
- MAPLE_COMMAND_BWRITE = 12,
- MAPLE_COMMAND_SETCOND = 14
+ MAPLE_RESPONSE_FILEERR = -5,
+ MAPLE_RESPONSE_AGAIN = -4, /* retransmit */
+ MAPLE_RESPONSE_BADCMD = -3,
+ MAPLE_RESPONSE_BADFUNC = -2,
+ MAPLE_RESPONSE_NONE = -1, /* unit didn't respond*/
+ MAPLE_COMMAND_DEVINFO = 1,
+ MAPLE_COMMAND_ALLINFO = 2,
+ MAPLE_COMMAND_RESET = 3,
+ MAPLE_COMMAND_KILL = 4,
+ MAPLE_RESPONSE_DEVINFO = 5,
+ MAPLE_RESPONSE_ALLINFO = 6,
+ MAPLE_RESPONSE_OK = 7,
+ MAPLE_RESPONSE_DATATRF = 8,
+ MAPLE_COMMAND_GETCOND = 9,
+ MAPLE_COMMAND_GETMINFO = 10,
+ MAPLE_COMMAND_BREAD = 11,
+ MAPLE_COMMAND_BWRITE = 12,
+ MAPLE_COMMAND_BSYNC = 13,
+ MAPLE_COMMAND_SETCOND = 14,
+ MAPLE_COMMAND_MICCONTROL = 15
+};
+
+enum maple_file_errors {
+ MAPLE_FILEERR_INVALID_PARTITION = 0x01000000,
+ MAPLE_FILEERR_PHASE_ERROR = 0x02000000,
+ MAPLE_FILEERR_INVALID_BLOCK = 0x04000000,
+ MAPLE_FILEERR_WRITE_ERROR = 0x08000000,
+ MAPLE_FILEERR_INVALID_WRITE_LENGTH = 0x10000000,
+ MAPLE_FILEERR_BAD_CRC = 0x20000000
+};
+
+struct maple_buffer {
+ char bufx[0x400];
+ void *buf;
};

struct mapleq {
struct list_head list;
struct maple_device *dev;
- void *sendbuf, *recvbuf, *recvbufdcsp;
+ struct maple_buffer *recvbuf;
+ void *sendbuf, *recvbuf_p2;
unsigned char length;
enum maple_code command;
- struct mutex mutex;
};

struct maple_devinfo {
@@ -52,11 +68,15 @@ struct maple_device {
struct maple_driver *driver;
struct mapleq *mq;
void (*callback) (struct mapleq * mq);
+ void (*fileerrhandler)(struct maple_device * mdev, void * recvbuf);
+ int (*canunload)(struct maple_device * mdev);
unsigned long when, interval, function;
struct maple_devinfo devinfo;
unsigned char port, unit;
char product_name[32];
char product_licence[64];
+ int busy;
+ wait_queue_head_t maple_wait;
struct device dev;
};

@@ -72,7 +92,7 @@ void maple_getcond_callback(struct maple_device *dev,
int maple_driver_register(struct maple_driver *);
void maple_driver_unregister(struct maple_driver *);

-int maple_add_packet_sleeps(struct maple_device *mdev, u32 function,
+int maple_add_packet(struct maple_device *mdev, u32 function,
u32 command, u32 length, void *data);
void maple_clear_dev(struct maple_device *mdev);