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    Subject[PATCH 1/3] Maple bus support for the Sega Dreamcast
    This patch adds support for Sega's proprietary Maple bus - which is
    required to support the Dreamcast's peripherals.

    This driver represents a substantial re-write of the old 2.4 driver.

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

    diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
    index 54878f0..c1771b7 100644
    --- a/arch/sh/Kconfig
    +++ b/arch/sh/Kconfig
    @@ -702,6 +702,17 @@ config CF_BASE_ADDR
    default "0xb8000000" if CF_AREA6
    default "0xb4000000" if CF_AREA5

    +config MAPLE
    + tristate "Maple Bus Support"
    + depends on SH_DREAMCAST
    + help
    + The Maple Bus is SEGA's serial communication bus for peripherals
    + on the Dreamcast. Without this bus support you won't be able to
    + get your Dreamcast keyboard etc to work, so most users
    + probably want to say 'Y' here, unless you are only using the
    + Dreamcast with a serial line terminal or a remote network
    + connection.
    +
    source "arch/sh/drivers/pci/Kconfig"

    source "drivers/pci/Kconfig"
    diff --git a/drivers/sh/Makefile b/drivers/sh/Makefile
    index 8a14389..f0a1f4f 100644
    --- a/drivers/sh/Makefile
    +++ b/drivers/sh/Makefile
    @@ -3,4 +3,5 @@
    #

    obj-$(CONFIG_SUPERHYWAY) += superhyway/
    +obj-$(CONFIG_MAPLE) += maple/

    diff --git a/drivers/sh/maple/Makefile b/drivers/sh/maple/Makefile
    new file mode 100644
    index 0000000..f8c39f2
    --- /dev/null
    +++ b/drivers/sh/maple/Makefile
    @@ -0,0 +1,3 @@
    +#Makefile for Maple Bus
    +
    +obj-y := maplebus.o
    diff --git a/drivers/sh/maple/maplebus.c b/drivers/sh/maple/maplebus.c
    new file mode 100644
    index 0000000..0f2223c
    --- /dev/null
    +++ b/drivers/sh/maple/maplebus.c
    @@ -0,0 +1,737 @@
    +/* maplebus.c
    + * Core maple bus functionality
    + * Original 2.4 code used here copyright
    + * YAEGASHI Takeshi, Paul Mundt, M. R. Brown and others
    + * Porting to 2.6 Copyright Adrian McMenamin, 2007
    + *
    + * This program is free software; you can redistribute it and/or modify
    + * it under the terms of the GNU General Public License as published by
    + * the Free Software Foundation; either version 2 of the License, or
    + * (at your option) any later version.
    + *
    + * 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.
    + *
    + * You should have received a copy of the GNU General Public License
    + * along with this program; if not, see the file COPYING, or write
    + * to the Free Software Foundation, Inc.,
    + * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
    + */
    +
    +#include <linux/init.h>
    +#include <linux/device.h>
    +#include <linux/moduleparam.h>
    +#include <linux/interrupt.h>
    +#include <linux/list.h>
    +#include <linux/io.h>
    +#include <linux/slab.h>
    +#include <linux/maple.h>
    +#include <asm/cacheflush.h>
    +#include <asm/dma.h>
    +#include <asm/mach/sysasic.h>
    +
    +MODULE_AUTHOR("Yaegshi Takeshi, Paul Mundt, MR Brown, Adrian McMenamin");
    +MODULE_DESCRIPTION("Maple bus driver for Dreamcast");
    +MODULE_LICENSE("GPL");
    +MODULE_SUPPORTED_DEVICE("{{SEGA, Dreamcast/Maple}}");
    +
    +static void maple_dma_handler(struct work_struct *work);
    +static void maple_vblank_handler(struct work_struct *work);
    +
    +static DECLARE_WORK(maple_dma_process, maple_dma_handler);
    +static DECLARE_WORK(maple_vblank_process, maple_vblank_handler);
    +
    +static LIST_HEAD(maple_waitq);
    +static LIST_HEAD(maple_sentq);
    +
    +
    +static struct maple_driver maple_null_driver;
    +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 struct kmem_cache *maple_cache;
    +
    +int maple_driver_register(struct device_driver *drv)
    +{
    + if (!drv)
    + return -EINVAL;
    + drv->bus = &maple_bus_type;
    + return driver_register(drv);
    +}
    +EXPORT_SYMBOL_GPL(maple_driver_register);
    +
    +void maplebus_init_hardware(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);
    + ctrl_outl(PHYSADDR(maple_sendbuf), MAPLE_DMAADDR);
    + ctrl_outl(1, MAPLE_ENABLE);
    +}
    +EXPORT_SYMBOL_GPL(maplebus_init_hardware);
    +
    +void maple_getcond_callback(struct maple_device *dev,
    + 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 = 0;
    +}
    +EXPORT_SYMBOL_GPL(maple_getcond_callback);
    +
    +int maple_dma_done(void)
    +{
    + return (ctrl_inl(MAPLE_STATE) & 1) == 0;
    +}
    +EXPORT_SYMBOL_GPL(maple_dma_done);
    +
    +static void maple_release_device(struct device *dev)
    +{
    + if (dev->type) {
    + kfree(dev->type->name);
    + kfree(dev->type);
    + }
    +}
    +
    +void maple_add_packet(struct mapleq *mq)
    +{
    + list_add((struct list_head *) mq, &maple_waitq);
    +}
    +
    +static struct mapleq *maple_allocq(struct maple_device *dev)
    +{
    + struct mapleq *mq;
    +
    + mq = kmalloc(sizeof(*mq), GFP_KERNEL);
    + if (unlikely(!mq))
    + return NULL;
    +
    + mq->dev = dev;
    + mq->recvbuf = kmem_cache_zalloc(maple_cache, GFP_KERNEL);
    + if (unlikely(!mq->recvbuf)) {
    + kfree(mq);
    + return NULL;
    + }
    +
    + return mq;
    +}
    +
    +static struct maple_device *maple_alloc_dev(int port, int unit)
    +{
    + struct maple_device *dev;
    +
    + dev = kzalloc(sizeof(*dev), GFP_KERNEL);
    + if (unlikely(!dev))
    + return NULL;
    +
    + dev->port = port;
    + dev->unit = unit;
    + dev->mq = maple_allocq(dev);
    +
    + if (unlikely(!dev->mq)) {
    + kfree(dev);
    + return NULL;
    + }
    +
    + return dev;
    +}
    +
    +static void maple_free_dev(struct maple_device *mdev)
    +{
    + if (!mdev)
    + return;
    + kmem_cache_free(maple_cache, mdev->mq->recvbuf);
    + kfree(mdev->mq);
    + kfree(mdev);
    +}
    +
    +static void maple_build_block(struct mapleq *mq)
    +{
    + int port, unit, from, to, len;
    + unsigned long *lsendbuf = mq->sendbuf;
    +
    + port = mq->dev->port & 3;
    + unit = mq->dev->unit;
    + len = mq->length;
    + from = port << 6;
    + to = (port << 6) | (unit > 0 ? (1 << (unit - 1)) & 0x1f : 0x20);
    +
    + *maple_lastptr &= 0x7fffffff;
    + maple_lastptr = maple_sendptr;
    +
    + *maple_sendptr++ = (port << 16) | len | 0x80000000;
    + *maple_sendptr++ = PHYSADDR(mq->recvbuf);
    + *maple_sendptr++ =
    + mq->command | (to << 8) | (from << 16) | (len << 24);
    +
    + while (len-- > 0)
    + *maple_sendptr++ = *lsendbuf++;
    +}
    +
    +void maple_send(void)
    +{
    + int i;
    + int maple_packets;
    + struct mapleq *mq, *nmq;
    +
    + if (!list_empty(&maple_sentq))
    + return;
    + if (list_empty(&maple_waitq) || !maple_dma_done())
    + return;
    + maple_packets = 0;
    + maple_sendptr = maple_lastptr = maple_sendbuf;
    + list_for_each_entry_safe(mq, nmq, &maple_waitq, list) {
    + maple_build_block(mq);
    + list_move(&mq->list, &maple_sentq);
    + if (unlikely(maple_packets++ > MAPLE_MAXPACKETS))
    + break;
    + }
    + if (maple_packets > 0) {
    + for (i = 0; i < (1 << MAPLE_DMA_PAGES); i++)
    + dma_cache_wback_inv(maple_sendbuf + i * PAGE_SIZE,
    + PAGE_SIZE);
    + }
    +}
    +
    +static int attach_matching_maple_driver(struct device_driver *driver,
    + void *devptr)
    +{
    + struct maple_driver *maple_drv;
    + struct maple_device *mdev;
    +
    + mdev = devptr;
    + maple_drv = to_maple_driver(driver);
    + if (unlikely
    + (mdev->devinfo.function & be32_to_cpu(maple_drv->function))) {
    + if (likely(maple_drv->connect(mdev) == 0)) {
    + mdev->driver = maple_drv;
    + 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);
    +}
    +
    +static void maple_attach_driver(struct maple_device *dev)
    +{
    + char *p;
    +
    + char *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--)
    + if (*p == ' ')
    + *p = '\0';
    + else
    + break;
    +
    + for (p = dev->product_licence + 59; dev->product_licence <= p; p--)
    + if (*p == ' ')
    + *p = '\0';
    + else
    + break;
    +
    + function = be32_to_cpu(dev->devinfo.function);
    +
    + if (unlikely(function == 0xFFFFFFFF)) {
    + /* Do this silently - as not a real device */
    + function = 0;
    + dev->driver = &maple_null_driver;
    + sprintf(dev->dev.bus_id, "%d:0.port", dev->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);
    +
    + if (matched == 0) {
    + /* Driver does not exist yet */
    + printk(KERN_INFO
    + "No maple driver found for this device\n");
    + dev->driver = &maple_null_driver;
    + }
    +
    + sprintf(dev->dev.bus_id, "%d:0%d.%lX", dev->port,
    + dev->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);
    + }
    + dev->registered = 1;
    +}
    +
    +/* if device has been registered for the given
    + * 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)
    +{
    + struct device_specify *ds;
    + struct maple_device *mdev;
    +
    + ds = portptr;
    + mdev = to_maple_dev(device);
    + if (unlikely(mdev->port == ds->port && mdev->unit == ds->unit))
    + return 1;
    + return 0;
    +}
    +
    +static int setup_maple_commands(struct device *device, void *ignored)
    +{
    + struct maple_device *maple_dev = to_maple_dev(device);
    +
    + if (likely(maple_dev->interval > 0)) {
    + if (likely(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++;
    + }
    + } else {
    + if (jiffies >= maple_pnp_time) {
    + maple_dev->mq->command = MAPLE_COMMAND_DEVINFO;
    + maple_dev->mq->length = 0;
    + maple_add_packet(maple_dev->mq);
    + liststatus++;
    + }
    + }
    +
    + return 0;
    +}
    +
    +static void maple_vblank_handler(struct work_struct *work)
    +{
    + /* Turn off Maple DMA while we do this */
    + if (unlikely(!maple_dma_done()))
    + return;
    + if (unlikely(!list_empty(&maple_sentq)))
    + return;
    + ctrl_outl(0, MAPLE_ENABLE);
    + liststatus = 0;
    + bus_for_each_dev(&maple_bus_type, NULL, NULL,
    + setup_maple_commands);
    + if (jiffies >= maple_pnp_time)
    + maple_pnp_time = jiffies + MAPLE_PNP_INTERVAL;
    + if (likely(liststatus && list_empty(&maple_sentq))) {
    + INIT_LIST_HEAD(&maple_sentq);
    + maple_send();
    + }
    + maplebus_init_hardware();
    +}
    +
    +static void maple_map_subunits(struct maple_device *mdev, int submask)
    +{
    + int retval, k, devcheck;
    + struct maple_device *mdev_add;
    + struct device_specify ds;
    +
    + 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);
    + if (retval) {
    + submask = submask >> 1;
    + continue;
    + }
    + devcheck = submask & 0x01;
    + if (unlikely(devcheck)) {
    + mdev_add = maple_alloc_dev(mdev->port, k + 1);
    + mdev_add->mq->command = MAPLE_COMMAND_DEVINFO;
    + mdev_add->mq->length = 0;
    + maple_add_packet(mdev_add->mq);
    + scanning = 1;
    + }
    + submask = submask >> 1;
    + }
    +}
    +
    +static void maple_clean_submap(struct maple_device *mdev)
    +{
    + int killbit;
    +
    + killbit = (mdev->unit > 0 ? (1 << (mdev->unit - 1)) & 0x1f : 0x20);
    + killbit = ~killbit;
    + killbit &= 0xFF;
    + subdevice_map[mdev->port] = subdevice_map[mdev->port] & killbit;
    +}
    +
    +static void maple_response_none(struct maple_device *mdev,
    + struct mapleq *mq)
    +{
    + if (unlikely(!started)) {
    + printk(KERN_INFO "No maple devices attached to port %d\n",
    + mdev->port);
    + maple_attach_driver(mdev);
    + return;
    + }
    + if (unlikely(mdev->unit != 0)) {
    + list_del(&mq->list);
    + maple_detach_driver(mdev);
    + maple_clean_submap(mdev);
    + printk(KERN_INFO "Maple bus detaching at (%d, %d)\n",
    + mdev->port, mdev->unit);
    + return;
    + }
    + maple_clean_submap(mdev);
    +}
    +
    +static void maple_response_devinfo(struct maple_device *mdev,
    + char *recvbuf)
    +{
    + char submask;
    + if ((unlikely(!started)) || (unlikely(scanning == 2))) {
    + maple_attach_driver(mdev);
    + return;
    + }
    + if (likely(mdev->unit == 0)) {
    + submask = recvbuf[2] & 0x1F;
    + if (unlikely(submask ^ subdevice_map[mdev->port])) {
    + maple_map_subunits(mdev, submask);
    + subdevice_map[mdev->port] = submask;
    + }
    + }
    +}
    +
    +static void maple_dma_handler(struct work_struct *work)
    +{
    + struct mapleq *mq, *nmq;
    + struct maple_device *dev;
    + char *recvbuf;
    + enum maple_code code;
    +
    + if (unlikely(!maple_dma_done()))
    + return;
    + ctrl_outl(0, MAPLE_ENABLE);
    +
    + /* Be extra cautious and check new DMA cycle not already underway */
    + if (likely(!list_empty(&maple_sentq))) {
    + list_for_each_entry_safe(mq, nmq, &maple_sentq, list) {
    + recvbuf = mq->recvbuf;
    + code = recvbuf[0];
    + dev = mq->dev;
    + switch (code) {
    + case MAPLE_RESPONSE_NONE:
    + maple_response_none(dev, mq);
    + break;
    +
    + case MAPLE_RESPONSE_DEVINFO:
    + maple_response_devinfo(dev, recvbuf);
    + break;
    +
    + case MAPLE_RESPONSE_DATATRF:
    + if (dev->callback)
    + dev->callback(mq);
    + break;
    +
    + case MAPLE_RESPONSE_FILEERR:
    + case MAPLE_RESPONSE_AGAIN:
    + case MAPLE_RESPONSE_BADCMD:
    + case MAPLE_RESPONSE_BADFUNC:
    + printk(KERN_DEBUG
    + "Maple non-fatal error 0x%X\n",
    + code);
    + break;
    +
    + case MAPLE_RESPONSE_ALLINFO:
    + printk(KERN_DEBUG
    + "Maple - extended device information not supported\n");
    + break;
    +
    + case MAPLE_RESPONSE_OK:
    + break;
    +
    + default:
    + break;
    + }
    + }
    + INIT_LIST_HEAD(&maple_sentq);
    + if (unlikely(scanning == 1)) {
    + maple_send();
    + scanning = 2;
    + } else
    + scanning = 0;
    +
    + if (unlikely(started == 0))
    + started = 1;
    + }
    + maplebus_init_hardware();
    +}
    +
    +static irqreturn_t maplebus_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)
    +{
    + 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);
    +}
    +
    +static int maple_set_vblank_interrupt_handler(void)
    +{
    + return setup_irq(HW_EVENT_VSYNC, &maple_vblank_irq);
    +}
    +
    +static int maple_get_dma_buffer(void)
    +{
    + maple_sendbuf =
    + (void *) __get_free_pages(GFP_KERNEL | __GFP_ZERO,
    + MAPLE_DMA_PAGES);
    + if (unlikely(!maple_sendbuf))
    + return -ENOMEM;
    + return 0;
    +}
    +
    +static int match_maple_bus_driver(struct device *devptr,
    + struct device_driver *drvptr)
    +{
    + struct maple_driver *maple_drv;
    + struct maple_device *maple_dev;
    +
    + maple_drv = container_of(drvptr, struct maple_driver, drv);
    + maple_dev = container_of(devptr, struct maple_device, dev);
    + /* Trap empty port case */
    + if (unlikely(maple_dev->devinfo.function == 0xFFFFFFFF))
    + return 0;
    + else if (unlikely
    + (maple_dev->devinfo.function &
    + be32_to_cpu(maple_drv->function)))
    + return 1;
    + return 0;
    +}
    +
    +static int maple_bus_uevent(struct device *dev, char **envp,
    + int num_envp, char *buffer, int buffer_size)
    +{
    + return 0;
    +}
    +
    +static void maple_bus_release(struct device *dev)
    +{
    +}
    +
    +static struct maple_driver maple_null_driver = {
    + .drv = {
    + .name = "Maple_bus_basic_driver",
    + .bus = &maple_bus_type,
    + },
    +};
    +
    +struct bus_type maple_bus_type = {
    + .name = "maple",
    + .match = match_maple_bus_driver,
    + .uevent = maple_bus_uevent,
    +};
    +
    +EXPORT_SYMBOL_GPL(maple_bus_type);
    +
    +static struct device maple_bus = {
    + .bus_id = "maple",
    + .release = maple_bus_release,
    +};
    +
    +static int __init maple_bus_init(void)
    +{
    + int retval, i;
    + struct maple_device *mdev[MAPLE_PORTS];
    + ctrl_outl(0, MAPLE_STATE);
    +
    + retval = device_register(&maple_bus);
    + if (unlikely(retval))
    + goto cleanup;
    +
    + retval = bus_register(&maple_bus_type);
    + if (unlikely(retval))
    + goto cleanup_device;
    +
    + retval = driver_register(&maple_null_driver.drv);
    +
    + if (unlikely(retval))
    + goto cleanup_bus;
    +
    + /* allocate memory for maple bus dma */
    + retval = maple_get_dma_buffer();
    + if (unlikely(retval)) {
    + printk(KERN_INFO
    + "Maple bus: Failed to allocate Maple DMA buffers\n");
    + goto cleanup_basic;
    + }
    +
    + /* set up DMA interrupt handler */
    + retval = maple_set_dma_interrupt_handler();
    + if (unlikely(retval)) {
    + printk(KERN_INFO
    + "Maple bus: Failed to grab maple DMA IRQ\n");
    + goto cleanup_dma;
    + }
    +
    + /* set up VBLANK interrupt handler */
    + retval = maple_set_vblank_interrupt_handler();
    + if (unlikely(retval)) {
    + printk(KERN_INFO "Maple bus: Failed to grab VBLANK IRQ\n");
    + goto cleanup_irq;
    + }
    +
    + maple_cache =
    + kmem_cache_create("Maplebus_cache", 0x400, 0,
    + SLAB_HWCACHE_ALIGN, NULL);
    +
    + if (unlikely(!maple_cache))
    + goto cleanup_bothirqs;
    +
    + /* setup maple ports */
    + for (i = 0; i < MAPLE_PORTS; i++) {
    + mdev[i] = maple_alloc_dev(i, 0);
    + if (unlikely(!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_add_packet(mdev[i]->mq);
    + subdevice_map[i] = 0;
    + }
    +
    + /* setup maplebus hardware */
    + maplebus_init_hardware();
    +
    + /* initial detection */
    + maple_send();
    +
    + maple_pnp_time = 0;
    +
    + printk(KERN_INFO "Maple bus core now registered.\n");
    +
    + return 0;
    +
    + cleanup_cache:
    + kmem_cache_destroy(maple_cache);
    +
    + cleanup_bothirqs:
    + free_irq(HW_EVENT_VSYNC, 0);
    +
    + cleanup_irq:
    + free_irq(HW_EVENT_MAPLE_DMA, 0);
    +
    + cleanup_dma:
    + free_pages((unsigned long) maple_sendbuf, MAPLE_DMA_PAGES);
    +
    + cleanup_basic:
    + driver_unregister(&maple_null_driver.drv);
    +
    + cleanup_bus:
    + bus_unregister(&maple_bus_type);
    +
    + cleanup_device:
    + device_unregister(&maple_bus);
    +
    + cleanup:
    + printk(KERN_INFO "Maple bus registration failed\n");
    + return retval;
    +}
    +
    +static int maple_remove_driver(struct device_driver *driver, void *ignored)
    +{
    + driver_unregister(driver);
    + return 0;
    +}
    +
    +static int maple_remove_device(struct device *dev, void *ignored)
    +{
    + struct maple_device *mdev;
    + mdev = to_maple_dev(dev);
    + maple_detach_driver(mdev);
    + return 0;
    +}
    +
    +static void __exit maple_bus_exit(void)
    +{
    + int ignored;
    + free_irq(HW_EVENT_MAPLE_DMA, 0);
    + free_irq(HW_EVENT_VSYNC, 0);
    +
    + ignored = bus_for_each_drv(&maple_bus_type, NULL, NULL,
    + maple_remove_driver);
    + ignored = bus_for_each_dev(&maple_bus_type, NULL, NULL,
    + maple_remove_device);
    +
    + bus_unregister(&maple_bus_type);
    + device_unregister(&maple_bus);
    +
    + kmem_cache_destroy(maple_cache);
    +
    + if (likely(maple_sendbuf))
    + free_pages((unsigned long) maple_sendbuf, MAPLE_DMA_PAGES);
    +}
    +
    +/* use init call to ensure bus is registered ahead of devices */
    +subsys_initcall(maple_bus_init);
    +module_exit(maple_bus_exit);
    diff --git a/include/linux/input.h b/include/linux/input.h
    diff --git a/include/linux/maple.h b/include/linux/maple.h
    new file mode 100644
    index 0000000..1bb565d
    --- /dev/null
    +++ b/include/linux/maple.h
    @@ -0,0 +1,126 @@
    +/**
    + * maple.h
    + *
    + * porting to 2.6 driver model
    + * copyright Adrian McMenamin, 2007
    + *
    + */
    +
    +extern struct bus_type maple_bus_type;
    +extern struct semaphore maple_mutex;
    +
    +#define MAPLE_PORTS 4
    +#define MAPLE_PNP_INTERVAL HZ
    +#define MAPLE_MAXPACKETS 8
    +#define MAPLE_DMA_ORDER 14
    +#define MAPLE_DMA_SIZE (1 << MAPLE_DMA_ORDER)
    +#define MAPLE_DMA_PAGES ((MAPLE_DMA_ORDER > PAGE_SHIFT) ?
    MAPLE_DMA_ORDER - PAGE_SHIFT : 0)
    +
    +/* Maple Bus registers */
    +#define MAPLE_BASE 0xa05f6c00
    +#define MAPLE_DMAADDR (MAPLE_BASE+0x04)
    +#define MAPLE_TRIGTYPE (MAPLE_BASE+0x10)
    +#define MAPLE_ENABLE (MAPLE_BASE+0x14)
    +#define MAPLE_STATE (MAPLE_BASE+0x18)
    +#define MAPLE_SPEED (MAPLE_BASE+0x80)
    +#define MAPLE_RESET (MAPLE_BASE+0x8c)
    +
    +#define MAPLE_MAGIC 0x6155404f
    +#define MAPLE_2MBPS 0
    +#define MAPLE_TIMEOUT(n) ((n)<<15)
    +
    +/* 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
    +};
    +
    +/* Function codes */
    +
    +#define MAPLE_FUNC_CONTROLLER 0x001
    +#define MAPLE_FUNC_MEMCARD 0x002
    +#define MAPLE_FUNC_LCD 0x004
    +#define MAPLE_FUNC_CLOCK 0x008
    +#define MAPLE_FUNC_MICROPHONE 0x010
    +#define MAPLE_FUNC_ARGUN 0x020
    +#define MAPLE_FUNC_KEYBOARD 0x040
    +#define MAPLE_FUNC_LIGHTGUN 0x080
    +#define MAPLE_FUNC_PURUPURU 0x100
    +#define MAPLE_FUNC_MOUSE 0x200
    +
    +struct mapleq {
    + struct list_head list;
    + struct maple_device *dev;
    + void *sendbuf, *recvbuf;
    + unsigned char length;
    + enum maple_code command;
    +};
    +
    +struct maple_devinfo {
    + unsigned long function;
    + unsigned long function_data[3];
    + unsigned char area_code;
    + unsigned char connector_directon;
    + char product_name[31];
    + char product_licence[61];
    + unsigned short standby_power;
    + unsigned short max_power;
    +};
    +
    +struct maple_device {
    + struct maple_driver *driver;
    + struct mapleq *mq;
    + void *private_data;
    + void (*callback) (struct mapleq * mq);
    + unsigned long when, interval, function;
    + struct maple_devinfo devinfo;
    + unsigned char port, unit;
    + char product_name[32];
    + char product_licence[64];
    + int registered;
    + struct device dev;
    +};
    +
    +struct maple_driver {
    + unsigned long function;
    + int (*connect) (struct maple_device * dev);
    + void (*disconnect) (struct maple_device * dev);
    + struct device_driver drv;
    +};
    +
    +struct device_specify {
    + int port;
    + int unit;
    +};
    +
    +void maple_getcond_callback(struct maple_device *dev,
    + void (*callback) (struct mapleq * mq),
    + unsigned long interval,
    + unsigned long function);
    +
    +void maple_setup_port_rescan(struct maple_device *mdev);
    +
    +void maplebus_init_hardware(void);
    +
    +int maple_dma_done(void);
    +
    +int maple_driver_register(struct device_driver *drv);
    +
    +#define to_maple_dev(n) container_of(n, struct maple_device, dev)
    +#define to_maple_driver(n) container_of(n, struct maple_driver, drv)
    -
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      Last update: 2007-09-09 18:49    [W:0.066 / U:90.308 seconds]
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