diff options
Diffstat (limited to 'drivers/sh/maple/maple.c')
| -rw-r--r-- | drivers/sh/maple/maple.c | 463 |
1 files changed, 235 insertions, 228 deletions
diff --git a/drivers/sh/maple/maple.c b/drivers/sh/maple/maple.c index 63f0de29aa1..4054fe93d6e 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 @@ -97,12 +92,20 @@ 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) */ 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); } @@ -134,21 +137,16 @@ 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 +156,12 @@ 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; + int 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); + sendbuf = kzalloc(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; - } - - if (length) { - sendbuf = kmalloc(length * 4, GFP_KERNEL); - if (!sendbuf) { - mutex_unlock(&mdev->mq->mutex); ret = -ENOMEM; goto out; } @@ -233,38 +175,35 @@ 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; + INIT_LIST_HEAD(&mq->list); 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 = &((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; } @@ -272,12 +211,16 @@ 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 +229,14 @@ 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); 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 +258,7 @@ 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 +271,28 @@ 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 +302,13 @@ 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 +323,7 @@ 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 +331,9 @@ static void maple_attach_driver(struct maple_device *mdev) { char *p, *recvbuf; unsigned long function; - int matched, retval; + int matched, error; - 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); @@ -395,7 +341,6 @@ static void maple_attach_driver(struct maple_device *mdev) 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.product_licence[0], recvbuf + 52, 60); 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); @@ -414,43 +359,41 @@ static void maple_attach_driver(struct maple_device *mdev) else break; - printk(KERN_INFO "Maple device detected: %s\n", - mdev->product_name); - printk(KERN_INFO "Maple device: %s\n", mdev->product_licence); - 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; - mdev->driver = &maple_dummy_driver; + mdev->driver = &maple_unsupported_device; sprintf(mdev->dev.bus_id, "%d:0.port", mdev->port); + } else { - printk(KERN_INFO - "Maple bus at (%d, %d): Function 0x%lX\n", - mdev->port, mdev->unit, function); 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; + dev_info(&mdev->dev, "no driver found\n"); + 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) { - printk(KERN_INFO - "Maple bus: Attempt to register device" - " (%x, %x) failed.\n", - mdev->port, mdev->unit); + + 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; @@ -462,7 +405,7 @@ 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 +420,25 @@ 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 && 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) - 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 (atomic_read(&mdev->busy) == 0) { + atomic_set(&mdev->busy, 1); + maple_add_packet(mdev, 0, + MAPLE_COMMAND_DEVINFO, 0, NULL); + } } return 0; } @@ -499,29 +446,50 @@ 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; + atomic_set(&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 +501,7 @@ 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 +511,7 @@ static void maple_map_subunits(struct maple_device *mdev, int submask) mdev_add = maple_alloc_dev(mdev->port, k + 1); if (!mdev_add) return; + atomic_set(&mdev_add->busy, 1); maple_add_packet(mdev_add, 0, MAPLE_COMMAND_DEVINFO, 0, NULL); /* mark that we are checking sub devices */ @@ -564,27 +533,45 @@ 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) -{ - 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; - } - 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; + dev_info(&mdev->dev, "no devices" + " to port %d\n", mdev->port); + } + return; } - return; } - maple_clean_submap(mdev); + /* Some hardware devices generate false detach messages on unit 0 */ + atomic_set(&mdev->busy, 0); } /* preprocess hotplugs or scans */ @@ -599,8 +586,11 @@ 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 +601,17 @@ static void maple_response_devinfo(struct maple_device *mdev, } } +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; @@ -621,12 +622,6 @@ 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 +632,7 @@ 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 +641,56 @@ 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; + 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); - 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); + 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: @@ -699,20 +707,19 @@ 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 +727,14 @@ 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 +747,7 @@ 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 +772,18 @@ 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 +797,8 @@ 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) @@ -798,36 +808,33 @@ 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; /* 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; @@ -838,23 +845,23 @@ 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]) { while (i-- > 0) maple_free_dev(mdev[i]); goto cleanup_cache; } + 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; @@ -871,7 +878,7 @@ 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); @@ -880,7 +887,7 @@ cleanup_device: device_unregister(&maple_bus); cleanup: - printk(KERN_INFO "Maple bus registration failed\n"); + printk(KERN_ERR "Maple bus registration failed\n"); return retval; } /* Push init to later to ensure hardware gets detected */ |