/*
* Core maple bus functionality
*
- * Copyright (C) 2007 Adrian McMenamin
- *
- * Based on 2.4 code by:
- *
- * Copyright (C) 2000-2001 YAEGASHI Takeshi
+ * Copyright (C) 2007 - 2009 Adrian McMenamin
+ * Copyright (C) 2001 - 2008 Paul Mundt
+ * 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
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/device.h>
-#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/list.h>
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/maple.h>
#include <linux/dma-mapping.h>
+#include <linux/delay.h>
#include <asm/cacheflush.h>
#include <asm/dma.h>
#include <asm/io.h>
-#include <asm/mach/dma.h>
-#include <asm/mach/sysasic.h>
-#include <asm/mach/maple.h>
+#include <mach/dma.h>
+#include <mach/sysasic.h>
-MODULE_AUTHOR("Yaegshi 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}}");
static LIST_HEAD(maple_waitq);
static LIST_HEAD(maple_sentq);
-static DEFINE_MUTEX(maple_list_lock);
+/* 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;
static unsigned long maple_pnp_time;
-static int started, scanning, liststatus;
+static int started, scanning, fullscan;
static struct kmem_cache *maple_queue_cache;
struct maple_device_specify {
int unit;
};
+static bool checked[MAPLE_PORTS];
+static bool empty[MAPLE_PORTS];
+static struct maple_device *baseunits[MAPLE_PORTS];
+
/**
- * maple_driver_register - register a device driver
- * automatically makes the driver bus a maple bus
- * @drv: the driver to be registered
+ * maple_driver_register - register a maple driver
+ * @drv: maple driver to be registered.
+ *
+ * Registers the passed in @drv, while updating the bus type.
+ * Devices with matching function IDs will be automatically probed.
*/
-int maple_driver_register(struct device_driver *drv)
+int maple_driver_register(struct maple_driver *drv)
{
if (!drv)
return -EINVAL;
- drv->bus = &maple_bus_type;
- return driver_register(drv);
-}
+ drv->drv.bus = &maple_bus_type;
+
+ return driver_register(&drv->drv);
+}
EXPORT_SYMBOL_GPL(maple_driver_register);
+/**
+ * maple_driver_unregister - unregister a maple driver.
+ * @drv: maple driver to unregister.
+ *
+ * Cleans up after maple_driver_register(). To be invoked in the exit
+ * path of any module drivers.
+ */
+void maple_driver_unregister(struct maple_driver *drv)
+{
+ driver_unregister(&drv->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) */
ctrl_outl(1, MAPLE_TRIGTYPE);
- ctrl_outl(MAPLE_2MBPS | MAPLE_TIMEOUT(50000), MAPLE_SPEED);
+ /*
+ * Maple system register
+ * bits 31 - 16 timeout in units of 20nsec
+ * bit 12 hard trigger - set 0 to keep responding to VBLANK
+ * bits 9 - 8 set 00 for 2 Mbps, 01 for 1 Mbps
+ * bits 3 - 0 delay (in 1.3ms) between VBLANK and start of DMA
+ * max delay is 11
+ */
+ ctrl_outl(MAPLE_2MBPS | MAPLE_TIMEOUT(0xFFFF), MAPLE_SPEED);
ctrl_outl(PHYSADDR(maple_sendbuf), MAPLE_DMAADDR);
ctrl_outl(1, MAPLE_ENABLE);
}
* @function: the function code for the device
*/
void maple_getcond_callback(struct maple_device *dev,
- void (*callback) (struct mapleq * mq),
- unsigned long interval, unsigned long function)
+ void (*callback) (struct mapleq *mq),
+ unsigned long interval, unsigned long function)
{
dev->callback = callback;
dev->interval = interval;
dev->function = cpu_to_be32(function);
dev->when = jiffies;
}
-
EXPORT_SYMBOL_GPL(maple_getcond_callback);
static int maple_dma_done(void)
static void maple_release_device(struct device *dev)
{
- if (dev->type) {
- kfree(dev->type->name);
- kfree(dev->type);
- }
+ struct maple_device *mdev;
+ struct mapleq *mq;
+
+ mdev = to_maple_dev(dev);
+ mq = mdev->mq;
+ kmem_cache_free(maple_queue_cache, mq->recvbuf);
+ kfree(mq);
+ kfree(mdev);
}
/**
- * maple_add_packet - add a single instruction to the queue
- * @mq: instruction to add to waiting 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
+ * @length: length of command string (in 32 bit words)
+ * @data: remainder of command string
*/
-void maple_add_packet(struct mapleq *mq)
+int maple_add_packet(struct maple_device *mdev, u32 function, u32 command,
+ size_t length, void *data)
{
- mutex_lock(&maple_list_lock);
- list_add(&mq->list, &maple_waitq);
- mutex_unlock(&maple_list_lock);
-}
+ int ret = 0;
+ void *sendbuf = NULL;
+
+ if (length) {
+ sendbuf = kzalloc(length * 4, GFP_KERNEL);
+ if (!sendbuf) {
+ 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;
+
+ mutex_lock(&maple_wlist_lock);
+ list_add_tail(&mdev->mq->list, &maple_waitq);
+ mutex_unlock(&maple_wlist_lock);
+out:
+ return ret;
+}
EXPORT_SYMBOL_GPL(maple_add_packet);
-static struct mapleq *maple_allocq(struct maple_device *dev)
+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)
- return NULL;
+ goto failed_nomem;
- mq->dev = dev;
- mq->recvbufdcsp = kmem_cache_zalloc(maple_queue_cache, GFP_KERNEL);
- mq->recvbuf = (void *) P2SEGADDR(mq->recvbufdcsp);
- if (!mq->recvbuf) {
- kfree(mq);
- return NULL;
- }
+ INIT_LIST_HEAD(&mq->list);
+ mq->dev = mdev;
+ mq->recvbuf = kmem_cache_zalloc(maple_queue_cache, GFP_KERNEL);
+ if (!mq->recvbuf)
+ goto failed_p2;
+ mq->recvbuf->buf = &((mq->recvbuf->bufx)[0]);
return mq;
+
+failed_p2:
+ kfree(mq);
+failed_nomem:
+ dev_err(&mdev->dev, "could not allocate memory for device (%d, %d)\n",
+ mdev->port, mdev->unit);
+ return NULL;
}
static struct maple_device *maple_alloc_dev(int port, int unit)
{
- struct maple_device *dev;
+ struct maple_device *mdev;
+
+ /* zero this out to avoid kobj subsystem
+ * thinking it has already been registered */
- dev = kzalloc(sizeof(*dev), GFP_KERNEL);
- if (!dev)
+ mdev = kzalloc(sizeof(*mdev), GFP_KERNEL);
+ if (!mdev)
return NULL;
- dev->port = port;
- dev->unit = unit;
- dev->mq = maple_allocq(dev);
+ mdev->port = port;
+ mdev->unit = unit;
+
+ mdev->mq = maple_allocq(mdev);
- if (!dev->mq) {
- kfree(dev);
+ if (!mdev->mq) {
+ kfree(mdev);
return NULL;
}
-
- return dev;
+ mdev->dev.bus = &maple_bus_type;
+ mdev->dev.parent = &maple_bus;
+ init_waitqueue_head(&mdev->maple_wait);
+ return mdev;
}
static void maple_free_dev(struct maple_device *mdev)
{
- if (!mdev)
- return;
- if (mdev->mq) {
- 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);
}
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)
*maple_sendptr++ = *lsendbuf++;
}
/* build up command queue */
static void maple_send(void)
{
- int i;
- int maple_packets;
+ int i, maple_packets = 0;
struct mapleq *mq, *nmq;
- if (!list_empty(&maple_sentq))
- return;
- if (list_empty(&maple_waitq) || !maple_dma_done())
+ if (!maple_dma_done())
return;
- maple_packets = 0;
- maple_sendptr = maple_lastptr = maple_sendbuf;
+
+ /* disable DMA */
+ ctrl_outl(0, MAPLE_ENABLE);
+
+ if (!list_empty(&maple_sentq))
+ goto finish;
+
+ mutex_lock(&maple_wlist_lock);
+ if (list_empty(&maple_waitq)) {
+ mutex_unlock(&maple_wlist_lock);
+ goto finish;
+ }
+
+ maple_lastptr = maple_sendbuf;
+ maple_sendptr = maple_sendbuf;
+
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;
}
+ mutex_unlock(&maple_wlist_lock);
if (maple_packets > 0) {
for (i = 0; i < (1 << MAPLE_DMA_PAGES); i++)
dma_cache_sync(0, maple_sendbuf + i * PAGE_SIZE,
PAGE_SIZE, DMA_BIDIRECTIONAL);
}
+
+finish:
+ maple_dma_reset();
}
-static int attach_matching_maple_driver(struct device_driver *driver,
+/* check if there is a driver registered likely to match this device */
+static int maple_check_matching_driver(struct device_driver *driver,
void *devptr)
{
struct maple_driver *maple_drv;
mdev = devptr;
maple_drv = to_maple_driver(driver);
- if (mdev->devinfo.function & be32_to_cpu(maple_drv->function)) {
- if (maple_drv->connect(mdev) == 0) {
- mdev->driver = maple_drv;
- return 1;
- }
- }
+ if (mdev->devinfo.function & cpu_to_be32(maple_drv->function))
+ return 1;
return 0;
}
static void maple_detach_driver(struct maple_device *mdev)
{
- if (!mdev)
- return;
- if (mdev->driver) {
- if (mdev->driver->disconnect)
- mdev->driver->disconnect(mdev);
- }
- mdev->driver = NULL;
- if (mdev->registered) {
- maple_release_device(&mdev->dev);
- device_unregister(&mdev->dev);
- }
- mdev->registered = 0;
- maple_free_dev(mdev);
+ device_unregister(&mdev->dev);
}
/* process initial MAPLE_COMMAND_DEVINFO for each device or port */
-static void maple_attach_driver(struct maple_device *dev)
+static void maple_attach_driver(struct maple_device *mdev)
{
- char *p;
-
- char *recvbuf;
+ char *p, *recvbuf;
unsigned long function;
- int matched, retval;
-
- recvbuf = dev->mq->recvbuf;
- memcpy(&dev->devinfo, recvbuf + 4, sizeof(dev->devinfo));
- memcpy(dev->product_name, dev->devinfo.product_name, 30);
- memcpy(dev->product_licence, dev->devinfo.product_licence, 60);
- dev->product_name[30] = '\0';
- dev->product_licence[60] = '\0';
-
- for (p = dev->product_name + 29; dev->product_name <= p; p--)
+ int matched, error;
+
+ recvbuf = mdev->mq->recvbuf->buf;
+ /* copy the data as individual elements in
+ * case of memory optimisation */
+ memcpy(&mdev->devinfo.function, recvbuf + 4, 4);
+ memcpy(&mdev->devinfo.function_data[0], recvbuf + 8, 12);
+ memcpy(&mdev->devinfo.area_code, recvbuf + 20, 1);
+ memcpy(&mdev->devinfo.connector_direction, recvbuf + 21, 1);
+ memcpy(&mdev->devinfo.product_name[0], recvbuf + 22, 30);
+ memcpy(&mdev->devinfo.standby_power, recvbuf + 112, 2);
+ memcpy(&mdev->devinfo.max_power, recvbuf + 114, 2);
+ memcpy(mdev->product_name, mdev->devinfo.product_name, 30);
+ mdev->product_name[30] = '\0';
+ memcpy(mdev->product_licence, mdev->devinfo.product_licence, 60);
+ mdev->product_licence[60] = '\0';
+
+ for (p = mdev->product_name + 29; mdev->product_name <= p; p--)
if (*p == ' ')
*p = '\0';
else
break;
-
- for (p = dev->product_licence + 59; dev->product_licence <= p; p--)
+ for (p = mdev->product_licence + 59; mdev->product_licence <= p; p--)
if (*p == ' ')
*p = '\0';
else
break;
- function = be32_to_cpu(dev->devinfo.function);
+ function = be32_to_cpu(mdev->devinfo.function);
+
+ dev_info(&mdev->dev, "detected %s: function 0x%lX: at (%d, %d)\n",
+ mdev->product_name, function, mdev->port, mdev->unit);
if (function > 0x200) {
/* Do this silently - as not a real device */
function = 0;
- dev->driver = &maple_dummy_driver;
- sprintf(dev->dev.bus_id, "%d:0.port", dev->port);
+ mdev->driver = &maple_unsupported_device;
+ dev_set_name(&mdev->dev, "%d:0.port", mdev->port);
} else {
- printk(KERN_INFO
- "Maple bus at (%d, %d): Connected function 0x%lX\n",
- dev->port, dev->unit, function);
-
matched =
- bus_for_each_drv(&maple_bus_type, NULL, dev,
- attach_matching_maple_driver);
+ bus_for_each_drv(&maple_bus_type, NULL, mdev,
+ maple_check_matching_driver);
if (matched == 0) {
/* Driver does not exist yet */
- printk(KERN_INFO
- "No maple driver found for this device\n");
- dev->driver = &maple_dummy_driver;
+ dev_info(&mdev->dev, "no driver found\n");
+ mdev->driver = &maple_unsupported_device;
}
-
- sprintf(dev->dev.bus_id, "%d:0%d.%lX", dev->port,
- dev->unit, function);
+ dev_set_name(&mdev->dev, "%d:0%d.%lX", mdev->port,
+ mdev->unit, function);
}
- dev->function = function;
- dev->dev.bus = &maple_bus_type;
- dev->dev.parent = &maple_bus;
- dev->dev.release = &maple_release_device;
- retval = device_register(&dev->dev);
- if (retval) {
- printk(KERN_INFO
- "Maple bus: Attempt to register device (%x, %x) failed.\n",
- dev->port, dev->unit);
- maple_free_dev(dev);
+
+ mdev->function = function;
+ mdev->dev.release = &maple_release_device;
+
+ atomic_set(&mdev->busy, 0);
+ error = device_register(&mdev->dev);
+ if (error) {
+ dev_warn(&mdev->dev, "could not register device at"
+ " (%d, %d), with error 0x%X\n", mdev->unit,
+ mdev->port, error);
+ maple_free_dev(mdev);
+ mdev = NULL;
+ return;
}
- dev->registered = 1;
}
/*
* 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;
static int setup_maple_commands(struct device *device, void *ignored)
{
- struct maple_device *maple_dev = to_maple_dev(device);
-
- if ((maple_dev->interval > 0)
- && time_after(jiffies, maple_dev->when)) {
- maple_dev->when = jiffies + maple_dev->interval;
- maple_dev->mq->command = MAPLE_COMMAND_GETCOND;
- maple_dev->mq->sendbuf = &maple_dev->function;
- maple_dev->mq->length = 1;
- maple_add_packet(maple_dev->mq);
- liststatus++;
+ int add;
+ struct maple_device *mdev = to_maple_dev(device);
+ if (mdev->interval > 0 && atomic_read(&mdev->busy) == 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)
+ mdev->when = jiffies + mdev->interval;
} else {
- if (time_after(jiffies, maple_pnp_time)) {
- maple_dev->mq->command = MAPLE_COMMAND_DEVINFO;
- maple_dev->mq->length = 0;
- maple_add_packet(maple_dev->mq);
- liststatus++;
- }
+ if (time_after(jiffies, maple_pnp_time))
+ /* Ensure we don't have block reads and devinfo
+ * calls interfering with one another - so flag the
+ * device as busy */
+ if (atomic_read(&mdev->busy) == 0) {
+ atomic_set(&mdev->busy, 1);
+ maple_add_packet(mdev, 0,
+ MAPLE_COMMAND_DEVINFO, 0, NULL);
+ }
}
-
return 0;
}
/* VBLANK bottom half - implemented via workqueue */
static void maple_vblank_handler(struct work_struct *work)
{
+ int x, locking;
+ struct maple_device *mdev;
+
if (!maple_dma_done())
return;
- if (!list_empty(&maple_sentq))
- return;
+
ctrl_outl(0, MAPLE_ENABLE);
- liststatus = 0;
+
+ 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);
- if (time_after(jiffies, maple_pnp_time))
+ 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;
+ atomic_set(&mdev->busy, 1);
+ locking = maple_add_packet(mdev, 0,
+ MAPLE_COMMAND_DEVINFO, 0, NULL);
+ if (!locking)
+ break;
+ }
+ }
+
maple_pnp_time = jiffies + MAPLE_PNP_INTERVAL;
- if (liststatus && list_empty(&maple_sentq)) {
- INIT_LIST_HEAD(&maple_sentq);
- maple_send();
}
- 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;
struct maple_device *mdev_add;
struct maple_device_specify ds;
+ ds.port = mdev->port;
for (k = 0; k < 5; k++) {
- ds.port = mdev->port;
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;
mdev_add = maple_alloc_dev(mdev->port, k + 1);
if (!mdev_add)
return;
- mdev_add->mq->command = MAPLE_COMMAND_DEVINFO;
- mdev_add->mq->length = 0;
- maple_add_packet(mdev_add->mq);
+ atomic_set(&mdev_add->busy, 1);
+ maple_add_packet(mdev_add, 0, MAPLE_COMMAND_DEVINFO,
+ 0, NULL);
+ /* mark that we are checking sub devices */
scanning = 1;
}
submask = submask >> 1;
}
/* handle empty port or hotplug removal */
-static void maple_response_none(struct maple_device *mdev,
- struct mapleq *mq)
-{
- if (mdev->unit != 0) {
- list_del(&mq->list);
- maple_clean_submap(mdev);
- printk(KERN_INFO
- "Maple bus device detaching at (%d, %d)\n",
- mdev->port, mdev->unit);
+static void maple_response_none(struct maple_device *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->can_unload) {
+ if (!mdev->can_unload(mdev)) {
+ atomic_set(&mdev->busy, 2);
+ wake_up(&mdev->maple_wait);
+ return;
+ }
+ }
+
+ dev_info(&mdev->dev, "detaching device at (%d, %d)\n",
+ mdev->port, mdev->unit);
maple_detach_driver(mdev);
return;
+ } else {
+ if (!started || !fullscan) {
+ if (checked[mdev->port] == false) {
+ checked[mdev->port] = true;
+ empty[mdev->port] = true;
+ dev_info(&mdev->dev, "no devices"
+ " to port %d\n", mdev->port);
+ }
+ return;
+ }
}
- if (!started) {
- printk(KERN_INFO "No maple devices attached to port %d\n",
- mdev->port);
- return;
- }
- maple_clean_submap(mdev);
+ /* Some hardware devices generate false detach messages on unit 0 */
+ atomic_set(&mdev->busy, 0);
}
/* preprocess hotplugs or scans */
char *recvbuf)
{
char submask;
- if ((!started) || (scanning == 2)) {
- maple_attach_driver(mdev);
- return;
+ if (!started || (scanning == 2) || !fullscan) {
+ if ((mdev->unit == 0) && (checked[mdev->port] == false)) {
+ checked[mdev->port] = true;
+ maple_attach_driver(mdev);
+ } else {
+ if (mdev->unit != 0)
+ maple_attach_driver(mdev);
+ if (mdev->unit == 0) {
+ empty[mdev->port] = false;
+ maple_attach_driver(mdev);
+ }
+ }
}
if (mdev->unit == 0) {
submask = recvbuf[2] & 0x1F;
}
}
+static void maple_response_fileerr(struct maple_device *mdev, void *recvbuf)
+{
+ if (mdev->fileerr_handler) {
+ mdev->fileerr_handler(mdev, recvbuf);
+ return;
+ } else
+ dev_warn(&mdev->dev, "device at (%d, %d) reports"
+ "file error 0x%X\n", mdev->port, mdev->unit,
+ ((int *)recvbuf)[1]);
+}
+
+static void maple_port_rescan(void)
+{
+ int i;
+ struct maple_device *mdev;
+
+ fullscan = 1;
+ for (i = 0; i < MAPLE_PORTS; i++) {
+ if (checked[i] == false) {
+ fullscan = 0;
+ mdev = baseunits[i];
+ maple_add_packet(mdev, 0, MAPLE_COMMAND_DEVINFO,
+ 0, NULL);
+ }
+ }
+}
+
/* maple dma end bottom half - implemented via workqueue */
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;
ctrl_outl(0, MAPLE_ENABLE);
if (!list_empty(&maple_sentq)) {
list_for_each_entry_safe(mq, nmq, &maple_sentq, list) {
- recvbuf = mq->recvbuf;
+ mdev = mq->dev;
+ recvbuf = mq->recvbuf->buf;
+ dma_cache_sync(&mdev->dev, recvbuf, 0x400,
+ DMA_FROM_DEVICE);
code = recvbuf[0];
- dev = mq->dev;
+ kfree(mq->sendbuf);
+ 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);
+ atomic_set(&mdev->busy, 0);
break;
case MAPLE_RESPONSE_DATATRF:
- if (dev->callback)
- dev->callback(mq);
+ if (mdev->callback)
+ mdev->callback(mq);
+ atomic_set(&mdev->busy, 0);
+ wake_up(&mdev->maple_wait);
break;
case MAPLE_RESPONSE_FILEERR:
+ maple_response_fileerr(mdev, recvbuf);
+ atomic_set(&mdev->busy, 0);
+ wake_up(&mdev->maple_wait);
+ break;
+
case MAPLE_RESPONSE_AGAIN:
case MAPLE_RESPONSE_BADCMD:
case MAPLE_RESPONSE_BADFUNC:
- printk(KERN_DEBUG
- "Maple non-fatal error 0x%X\n",
- code);
+ dev_warn(&mdev->dev, "non-fatal error"
+ " 0x%X at (%d, %d)\n", code,
+ mdev->port, mdev->unit);
+ atomic_set(&mdev->busy, 0);
break;
case MAPLE_RESPONSE_ALLINFO:
- printk(KERN_DEBUG
- "Maple - extended device information not supported\n");
+ dev_notice(&mdev->dev, "extended"
+ " device information request for (%d, %d)"
+ " but call is not supported\n", mdev->port,
+ mdev->unit);
+ atomic_set(&mdev->busy, 0);
break;
case MAPLE_RESPONSE_OK:
+ atomic_set(&mdev->busy, 0);
+ wake_up(&mdev->maple_wait);
break;
default:
break;
}
}
- INIT_LIST_HEAD(&maple_sentq);
+ /* if scanning is 1 then we have subdevices to check */
if (scanning == 1) {
maple_send();
scanning = 2;
} else
scanning = 0;
-
- if (started == 0)
- started = 1;
+ /*check if we have actually tested all ports yet */
+ if (!fullscan)
+ maple_port_rescan();
+ /* mark that we have been through the first scan */
+ 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;
}
-static struct irqaction maple_dma_irq = {
- .name = "maple bus DMA handler",
- .handler = maplebus_dma_interrupt,
- .flags = IRQF_SHARED,
-};
-
-static struct irqaction maple_vblank_irq = {
- .name = "maple bus VBLANK handler",
- .handler = maplebus_vblank_interrupt,
- .flags = IRQF_SHARED,
-};
-
static int maple_set_dma_interrupt_handler(void)
{
- return setup_irq(HW_EVENT_MAPLE_DMA, &maple_dma_irq);
+ 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 setup_irq(HW_EVENT_VSYNC, &maple_vblank_irq);
+ return request_irq(HW_EVENT_VSYNC, maple_vblank_interrupt,
+ IRQF_SHARED, "maple bus VBLANK", &maple_unsupported_device);
}
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;
- struct maple_device *maple_dev;
+ struct maple_driver *maple_drv = to_maple_driver(drvptr);
+ struct maple_device *maple_dev = to_maple_dev(devptr);
- maple_drv = container_of(drvptr, struct maple_driver, drv);
- maple_dev = container_of(devptr, struct maple_device, dev);
/* Trap empty port case */
if (maple_dev->devinfo.function == 0xFFFFFFFF)
return 0;
else if (maple_dev->devinfo.function &
- be32_to_cpu(maple_drv->function))
+ cpu_to_be32(maple_drv->function))
return 1;
return 0;
}
{
}
-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);
static struct device maple_bus = {
- .bus_id = "maple",
+ .init_name = "maple",
.release = maple_bus_release,
};
{
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)
if (retval)
goto cleanup_device;
- retval = driver_register(&maple_dummy_driver.drv);
-
+ retval = driver_register(&maple_unsupported_device.drv);
if (retval)
goto cleanup_bus;
/* allocate memory for maple bus dma */
retval = maple_get_dma_buffer();
if (retval) {
- printk(KERN_INFO
- "Maple bus: Failed to allocate Maple DMA buffers\n");
+ dev_err(&maple_bus, "failed to allocate DMA buffers\n");
goto cleanup_basic;
}
/* set up DMA interrupt handler */
retval = maple_set_dma_interrupt_handler();
if (retval) {
- printk(KERN_INFO
- "Maple bus: Failed to grab maple DMA IRQ\n");
+ dev_err(&maple_bus, "bus failed to grab maple "
+ "DMA IRQ\n");
goto cleanup_dma;
}
/* set up VBLANK interrupt handler */
retval = maple_set_vblank_interrupt_handler();
if (retval) {
- printk(KERN_INFO "Maple bus: Failed to grab VBLANK IRQ\n");
+ dev_err(&maple_bus, "bus failed to grab VBLANK IRQ\n");
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;
+ INIT_LIST_HEAD(&maple_waitq);
+ INIT_LIST_HEAD(&maple_sentq);
+
/* setup maple ports */
for (i = 0; i < MAPLE_PORTS; i++) {
+ checked[i] = false;
+ empty[i] = false;
mdev[i] = maple_alloc_dev(i, 0);
if (!mdev[i]) {
while (i-- > 0)
maple_free_dev(mdev[i]);
goto cleanup_cache;
}
- mdev[i]->registered = 0;
- mdev[i]->mq->command = MAPLE_COMMAND_DEVINFO;
- mdev[i]->mq->length = 0;
- maple_attach_driver(mdev[i]);
- maple_add_packet(mdev[i]->mq);
+ baseunits[i] = mdev[i];
+ atomic_set(&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");
+ dev_info(&maple_bus, "bus core now registered\n");
return 0;
- cleanup_cache:
+cleanup_cache:
kmem_cache_destroy(maple_queue_cache);
- cleanup_bothirqs:
+cleanup_bothirqs:
free_irq(HW_EVENT_VSYNC, 0);
- cleanup_irq:
+cleanup_irq:
free_irq(HW_EVENT_MAPLE_DMA, 0);
- cleanup_dma:
+cleanup_dma:
free_pages((unsigned long) maple_sendbuf, MAPLE_DMA_PAGES);
- cleanup_basic:
- driver_unregister(&maple_dummy_driver.drv);
+cleanup_basic:
+ driver_unregister(&maple_unsupported_device.drv);
- cleanup_bus:
+cleanup_bus:
bus_unregister(&maple_bus_type);
- cleanup_device:
+cleanup_device:
device_unregister(&maple_bus);
- cleanup:
- printk(KERN_INFO "Maple bus registration failed\n");
+cleanup:
+ printk(KERN_ERR "Maple bus registration failed\n");
return retval;
}
-
-subsys_initcall(maple_bus_init);
+/* Push init to later to ensure hardware gets detected */
+fs_initcall(maple_bus_init);
Code Review / linux-3.10.git / blobdiff