summaryrefslogtreecommitdiff
path: root/drivers/video
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/video')
-rw-r--r--drivers/video/Kconfig10
-rw-r--r--drivers/video/Makefile1
-rw-r--r--drivers/video/pxa3xx-gcu.c772
-rw-r--r--drivers/video/pxa3xx-gcu.h38
4 files changed, 821 insertions, 0 deletions
diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
index 9f36a29b10b4..55dc6fb6e909 100644
--- a/drivers/video/Kconfig
+++ b/drivers/video/Kconfig
@@ -1932,6 +1932,16 @@ config FB_PXA_PARAMETERS
<file:Documentation/fb/pxafb.txt> describes the available parameters.
+config PXA3XX_GCU
+ tristate "PXA3xx 2D graphics accelerator driver"
+ depends on FB_PXA
+ help
+ Kernelspace driver for the 2D graphics controller unit (GCU)
+ found on PXA3xx processors. There is a counterpart driver in the
+ DirectFB suite, see http://www.directfb.org/
+
+ If you compile this as a module, it will be called pxa3xx_gcu.
+
config FB_MBX
tristate "2700G LCD framebuffer support"
depends on FB && ARCH_PXA
diff --git a/drivers/video/Makefile b/drivers/video/Makefile
index f9de51c39ad7..8c8fabdff9d0 100644
--- a/drivers/video/Makefile
+++ b/drivers/video/Makefile
@@ -101,6 +101,7 @@ obj-$(CONFIG_FB_CIRRUS) += cirrusfb.o
obj-$(CONFIG_FB_ASILIANT) += asiliantfb.o
obj-$(CONFIG_FB_PXA) += pxafb.o
obj-$(CONFIG_FB_PXA168) += pxa168fb.o
+obj-$(CONFIG_PXA3XX_GCU) += pxa3xx-gcu.o
obj-$(CONFIG_FB_W100) += w100fb.o
obj-$(CONFIG_FB_TMIO) += tmiofb.o
obj-$(CONFIG_FB_AU1100) += au1100fb.o
diff --git a/drivers/video/pxa3xx-gcu.c b/drivers/video/pxa3xx-gcu.c
new file mode 100644
index 000000000000..b81168df253d
--- /dev/null
+++ b/drivers/video/pxa3xx-gcu.c
@@ -0,0 +1,772 @@
+/*
+ * pxa3xx-gc.c - Linux kernel module for PXA3xx graphics controllers
+ *
+ * This driver needs a DirectFB counterpart in user space, communication
+ * is handled via mmap()ed memory areas and an ioctl.
+ *
+ * Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
+ * Copyright (c) 2009 Janine Kropp <nin@directfb.org>
+ * Copyright (c) 2009 Denis Oliver Kropp <dok@directfb.org>
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+/*
+ * WARNING: This controller is attached to System Bus 2 of the PXA which
+ * needs its arbiter to be enabled explictly (CKENB & 1<<9).
+ * There is currently no way to do this from Linux, so you need to teach
+ * your bootloader for now.
+ */
+
+#include <linux/module.h>
+#include <linux/version.h>
+
+#include <linux/platform_device.h>
+#include <linux/dma-mapping.h>
+#include <linux/miscdevice.h>
+#include <linux/interrupt.h>
+#include <linux/spinlock.h>
+#include <linux/uaccess.h>
+#include <linux/ioctl.h>
+#include <linux/delay.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/clk.h>
+#include <linux/fs.h>
+#include <linux/io.h>
+
+#include "pxa3xx-gcu.h"
+
+#define DRV_NAME "pxa3xx-gcu"
+#define MISCDEV_MINOR 197
+
+#define REG_GCCR 0x00
+#define GCCR_SYNC_CLR (1 << 9)
+#define GCCR_BP_RST (1 << 8)
+#define GCCR_ABORT (1 << 6)
+#define GCCR_STOP (1 << 4)
+
+#define REG_GCISCR 0x04
+#define REG_GCIECR 0x08
+#define REG_GCRBBR 0x20
+#define REG_GCRBLR 0x24
+#define REG_GCRBHR 0x28
+#define REG_GCRBTR 0x2C
+#define REG_GCRBEXHR 0x30
+
+#define IE_EOB (1 << 0)
+#define IE_EEOB (1 << 5)
+#define IE_ALL 0xff
+
+#define SHARED_SIZE PAGE_ALIGN(sizeof(struct pxa3xx_gcu_shared))
+
+/* #define PXA3XX_GCU_DEBUG */
+/* #define PXA3XX_GCU_DEBUG_TIMER */
+
+#ifdef PXA3XX_GCU_DEBUG
+#define QDUMP(msg) \
+ do { \
+ QPRINT(priv, KERN_DEBUG, msg); \
+ } while (0)
+#else
+#define QDUMP(msg) do {} while (0)
+#endif
+
+#define QERROR(msg) \
+ do { \
+ QPRINT(priv, KERN_ERR, msg); \
+ } while (0)
+
+struct pxa3xx_gcu_batch {
+ struct pxa3xx_gcu_batch *next;
+ u32 *ptr;
+ dma_addr_t phys;
+ unsigned long length;
+};
+
+struct pxa3xx_gcu_priv {
+ void __iomem *mmio_base;
+ struct clk *clk;
+ struct pxa3xx_gcu_shared *shared;
+ dma_addr_t shared_phys;
+ struct resource *resource_mem;
+ struct miscdevice misc_dev;
+ struct file_operations misc_fops;
+ wait_queue_head_t wait_idle;
+ wait_queue_head_t wait_free;
+ spinlock_t spinlock;
+ struct timeval base_time;
+
+ struct pxa3xx_gcu_batch *free;
+
+ struct pxa3xx_gcu_batch *ready;
+ struct pxa3xx_gcu_batch *ready_last;
+ struct pxa3xx_gcu_batch *running;
+};
+
+static inline unsigned long
+gc_readl(struct pxa3xx_gcu_priv *priv, unsigned int off)
+{
+ return __raw_readl(priv->mmio_base + off);
+}
+
+static inline void
+gc_writel(struct pxa3xx_gcu_priv *priv, unsigned int off, unsigned long val)
+{
+ __raw_writel(val, priv->mmio_base + off);
+}
+
+#define QPRINT(priv, level, msg) \
+ do { \
+ struct timeval tv; \
+ struct pxa3xx_gcu_shared *shared = priv->shared; \
+ u32 base = gc_readl(priv, REG_GCRBBR); \
+ \
+ do_gettimeofday(&tv); \
+ \
+ printk(level "%ld.%03ld.%03ld - %-17s: %-21s (%s, " \
+ "STATUS " \
+ "0x%02lx, B 0x%08lx [%ld], E %5ld, H %5ld, " \
+ "T %5ld)\n", \
+ tv.tv_sec - priv->base_time.tv_sec, \
+ tv.tv_usec / 1000, tv.tv_usec % 1000, \
+ __func__, msg, \
+ shared->hw_running ? "running" : " idle", \
+ gc_readl(priv, REG_GCISCR), \
+ gc_readl(priv, REG_GCRBBR), \
+ gc_readl(priv, REG_GCRBLR), \
+ (gc_readl(priv, REG_GCRBEXHR) - base) / 4, \
+ (gc_readl(priv, REG_GCRBHR) - base) / 4, \
+ (gc_readl(priv, REG_GCRBTR) - base) / 4); \
+ } while (0)
+
+static void
+pxa3xx_gcu_reset(struct pxa3xx_gcu_priv *priv)
+{
+ QDUMP("RESET");
+
+ /* disable interrupts */
+ gc_writel(priv, REG_GCIECR, 0);
+
+ /* reset hardware */
+ gc_writel(priv, REG_GCCR, GCCR_ABORT);
+ gc_writel(priv, REG_GCCR, 0);
+
+ memset(priv->shared, 0, SHARED_SIZE);
+ priv->shared->buffer_phys = priv->shared_phys;
+ priv->shared->magic = PXA3XX_GCU_SHARED_MAGIC;
+
+ do_gettimeofday(&priv->base_time);
+
+ /* set up the ring buffer pointers */
+ gc_writel(priv, REG_GCRBLR, 0);
+ gc_writel(priv, REG_GCRBBR, priv->shared_phys);
+ gc_writel(priv, REG_GCRBTR, priv->shared_phys);
+
+ /* enable all IRQs except EOB */
+ gc_writel(priv, REG_GCIECR, IE_ALL & ~IE_EOB);
+}
+
+static void
+dump_whole_state(struct pxa3xx_gcu_priv *priv)
+{
+ struct pxa3xx_gcu_shared *sh = priv->shared;
+ u32 base = gc_readl(priv, REG_GCRBBR);
+
+ QDUMP("DUMP");
+
+ printk(KERN_DEBUG "== PXA3XX-GCU DUMP ==\n"
+ "%s, STATUS 0x%02lx, B 0x%08lx [%ld], E %5ld, H %5ld, T %5ld\n",
+ sh->hw_running ? "running" : "idle ",
+ gc_readl(priv, REG_GCISCR),
+ gc_readl(priv, REG_GCRBBR),
+ gc_readl(priv, REG_GCRBLR),
+ (gc_readl(priv, REG_GCRBEXHR) - base) / 4,
+ (gc_readl(priv, REG_GCRBHR) - base) / 4,
+ (gc_readl(priv, REG_GCRBTR) - base) / 4);
+}
+
+static void
+flush_running(struct pxa3xx_gcu_priv *priv)
+{
+ struct pxa3xx_gcu_batch *running = priv->running;
+ struct pxa3xx_gcu_batch *next;
+
+ while (running) {
+ next = running->next;
+ running->next = priv->free;
+ priv->free = running;
+ running = next;
+ }
+
+ priv->running = NULL;
+}
+
+static void
+run_ready(struct pxa3xx_gcu_priv *priv)
+{
+ unsigned int num = 0;
+ struct pxa3xx_gcu_shared *shared = priv->shared;
+ struct pxa3xx_gcu_batch *ready = priv->ready;
+
+ QDUMP("Start");
+
+ BUG_ON(!ready);
+
+ shared->buffer[num++] = 0x05000000;
+
+ while (ready) {
+ shared->buffer[num++] = 0x00000001;
+ shared->buffer[num++] = ready->phys;
+ ready = ready->next;
+ }
+
+ shared->buffer[num++] = 0x05000000;
+ priv->running = priv->ready;
+ priv->ready = priv->ready_last = NULL;
+ gc_writel(priv, REG_GCRBLR, 0);
+ shared->hw_running = 1;
+
+ /* ring base address */
+ gc_writel(priv, REG_GCRBBR, shared->buffer_phys);
+
+ /* ring tail address */
+ gc_writel(priv, REG_GCRBTR, shared->buffer_phys + num * 4);
+
+ /* ring length */
+ gc_writel(priv, REG_GCRBLR, ((num + 63) & ~63) * 4);
+}
+
+static irqreturn_t
+pxa3xx_gcu_handle_irq(int irq, void *ctx)
+{
+ struct pxa3xx_gcu_priv *priv = ctx;
+ struct pxa3xx_gcu_shared *shared = priv->shared;
+ u32 status = gc_readl(priv, REG_GCISCR) & IE_ALL;
+
+ QDUMP("-Interrupt");
+
+ if (!status)
+ return IRQ_NONE;
+
+ spin_lock(&priv->spinlock);
+ shared->num_interrupts++;
+
+ if (status & IE_EEOB) {
+ QDUMP(" [EEOB]");
+
+ flush_running(priv);
+ wake_up_all(&priv->wait_free);
+
+ if (priv->ready) {
+ run_ready(priv);
+ } else {
+ /* There is no more data prepared by the userspace.
+ * Set hw_running = 0 and wait for the next userspace
+ * kick-off */
+ shared->num_idle++;
+ shared->hw_running = 0;
+
+ QDUMP(" '-> Idle.");
+
+ /* set ring buffer length to zero */
+ gc_writel(priv, REG_GCRBLR, 0);
+
+ wake_up_all(&priv->wait_idle);
+ }
+
+ shared->num_done++;
+ } else {
+ QERROR(" [???]");
+ dump_whole_state(priv);
+ }
+
+ /* Clear the interrupt */
+ gc_writel(priv, REG_GCISCR, status);
+ spin_unlock(&priv->spinlock);
+
+ return IRQ_HANDLED;
+}
+
+static int
+pxa3xx_gcu_wait_idle(struct pxa3xx_gcu_priv *priv)
+{
+ int ret = 0;
+
+ QDUMP("Waiting for idle...");
+
+ /* Does not need to be atomic. There's a lock in user space,
+ * but anyhow, this is just for statistics. */
+ priv->shared->num_wait_idle++;
+
+ while (priv->shared->hw_running) {
+ int num = priv->shared->num_interrupts;
+ u32 rbexhr = gc_readl(priv, REG_GCRBEXHR);
+
+ ret = wait_event_interruptible_timeout(priv->wait_idle,
+ !priv->shared->hw_running, HZ*4);
+
+ if (ret < 0)
+ break;
+
+ if (ret > 0)
+ continue;
+
+ if (gc_readl(priv, REG_GCRBEXHR) == rbexhr &&
+ priv->shared->num_interrupts == num) {
+ QERROR("TIMEOUT");
+ ret = -ETIMEDOUT;
+ break;
+ }
+ }
+
+ QDUMP("done");
+
+ return ret;
+}
+
+static int
+pxa3xx_gcu_wait_free(struct pxa3xx_gcu_priv *priv)
+{
+ int ret = 0;
+
+ QDUMP("Waiting for free...");
+
+ /* Does not need to be atomic. There's a lock in user space,
+ * but anyhow, this is just for statistics. */
+ priv->shared->num_wait_free++;
+
+ while (!priv->free) {
+ u32 rbexhr = gc_readl(priv, REG_GCRBEXHR);
+
+ ret = wait_event_interruptible_timeout(priv->wait_free,
+ priv->free, HZ*4);
+
+ if (ret < 0)
+ break;
+
+ if (ret > 0)
+ continue;
+
+ if (gc_readl(priv, REG_GCRBEXHR) == rbexhr) {
+ QERROR("TIMEOUT");
+ ret = -ETIMEDOUT;
+ break;
+ }
+ }
+
+ QDUMP("done");
+
+ return ret;
+}
+
+/* Misc device layer */
+
+static ssize_t
+pxa3xx_gcu_misc_write(struct file *filp, const char *buff,
+ size_t count, loff_t *offp)
+{
+ int ret;
+ unsigned long flags;
+ struct pxa3xx_gcu_batch *buffer;
+ struct pxa3xx_gcu_priv *priv =
+ container_of(filp->f_op, struct pxa3xx_gcu_priv, misc_fops);
+
+ int words = count / 4;
+
+ /* Does not need to be atomic. There's a lock in user space,
+ * but anyhow, this is just for statistics. */
+ priv->shared->num_writes++;
+
+ priv->shared->num_words += words;
+
+ /* Last word reserved for batch buffer end command */
+ if (words >= PXA3XX_GCU_BATCH_WORDS)
+ return -E2BIG;
+
+ /* Wait for a free buffer */
+ if (!priv->free) {
+ ret = pxa3xx_gcu_wait_free(priv);
+ if (ret < 0)
+ return ret;
+ }
+
+ /*
+ * Get buffer from free list
+ */
+ spin_lock_irqsave(&priv->spinlock, flags);
+
+ buffer = priv->free;
+ priv->free = buffer->next;
+
+ spin_unlock_irqrestore(&priv->spinlock, flags);
+
+
+ /* Copy data from user into buffer */
+ ret = copy_from_user(buffer->ptr, buff, words * 4);
+ if (ret) {
+ spin_lock_irqsave(&priv->spinlock, flags);
+ buffer->next = priv->free;
+ priv->free = buffer;
+ spin_unlock_irqrestore(&priv->spinlock, flags);
+ return ret;
+ }
+
+ buffer->length = words;
+
+ /* Append batch buffer end command */
+ buffer->ptr[words] = 0x01000000;
+
+ /*
+ * Add buffer to ready list
+ */
+ spin_lock_irqsave(&priv->spinlock, flags);
+
+ buffer->next = NULL;
+
+ if (priv->ready) {
+ BUG_ON(priv->ready_last == NULL);
+
+ priv->ready_last->next = buffer;
+ } else
+ priv->ready = buffer;
+
+ priv->ready_last = buffer;
+
+ if (!priv->shared->hw_running)
+ run_ready(priv);
+
+ spin_unlock_irqrestore(&priv->spinlock, flags);
+
+ return words * 4;
+}
+
+
+static long
+pxa3xx_gcu_misc_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
+{
+ unsigned long flags;
+ struct pxa3xx_gcu_priv *priv =
+ container_of(filp->f_op, struct pxa3xx_gcu_priv, misc_fops);
+
+ switch (cmd) {
+ case PXA3XX_GCU_IOCTL_RESET:
+ spin_lock_irqsave(&priv->spinlock, flags);
+ pxa3xx_gcu_reset(priv);
+ spin_unlock_irqrestore(&priv->spinlock, flags);
+ return 0;
+
+ case PXA3XX_GCU_IOCTL_WAIT_IDLE:
+ return pxa3xx_gcu_wait_idle(priv);
+ }
+
+ return -ENOSYS;
+}
+
+static int
+pxa3xx_gcu_misc_mmap(struct file *filp, struct vm_area_struct *vma)
+{
+ unsigned int size = vma->vm_end - vma->vm_start;
+ struct pxa3xx_gcu_priv *priv =
+ container_of(filp->f_op, struct pxa3xx_gcu_priv, misc_fops);
+
+ switch (vma->vm_pgoff) {
+ case 0:
+ /* hand out the shared data area */
+ if (size != SHARED_SIZE)
+ return -EINVAL;
+
+ return dma_mmap_coherent(NULL, vma,
+ priv->shared, priv->shared_phys, size);
+
+ case SHARED_SIZE >> PAGE_SHIFT:
+ /* hand out the MMIO base for direct register access
+ * from userspace */
+ if (size != resource_size(priv->resource_mem))
+ return -EINVAL;
+
+ vma->vm_flags |= VM_IO;
+ vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
+
+ return io_remap_pfn_range(vma, vma->vm_start,
+ priv->resource_mem->start >> PAGE_SHIFT,
+ size, vma->vm_page_prot);
+ }
+
+ return -EINVAL;
+}
+
+
+#ifdef PXA3XX_GCU_DEBUG_TIMER
+static struct timer_list pxa3xx_gcu_debug_timer;
+
+static void pxa3xx_gcu_debug_timedout(unsigned long ptr)
+{
+ struct pxa3xx_gcu_priv *priv = (struct pxa3xx_gcu_priv *) ptr;
+
+ QERROR("Timer DUMP");
+
+ /* init the timer structure */
+ init_timer(&pxa3xx_gcu_debug_timer);
+ pxa3xx_gcu_debug_timer.function = pxa3xx_gcu_debug_timedout;
+ pxa3xx_gcu_debug_timer.data = ptr;
+ pxa3xx_gcu_debug_timer.expires = jiffies + 5*HZ; /* one second */
+
+ add_timer(&pxa3xx_gcu_debug_timer);
+}
+
+static void pxa3xx_gcu_init_debug_timer(void)
+{
+ pxa3xx_gcu_debug_timedout((unsigned long) &pxa3xx_gcu_debug_timer);
+}
+#else
+static inline void pxa3xx_gcu_init_debug_timer(void) {}
+#endif
+
+static int
+add_buffer(struct platform_device *dev,
+ struct pxa3xx_gcu_priv *priv)
+{
+ struct pxa3xx_gcu_batch *buffer;
+
+ buffer = kzalloc(sizeof(struct pxa3xx_gcu_batch), GFP_KERNEL);
+ if (!buffer)
+ return -ENOMEM;
+
+ buffer->ptr = dma_alloc_coherent(&dev->dev, PXA3XX_GCU_BATCH_WORDS * 4,
+ &buffer->phys, GFP_KERNEL);
+ if (!buffer->ptr) {
+ kfree(buffer);
+ return -ENOMEM;
+ }
+
+ buffer->next = priv->free;
+
+ priv->free = buffer;
+
+ return 0;
+}
+
+static void
+free_buffers(struct platform_device *dev,
+ struct pxa3xx_gcu_priv *priv)
+{
+ struct pxa3xx_gcu_batch *next, *buffer = priv->free;
+
+ while (buffer) {
+ next = buffer->next;
+
+ dma_free_coherent(&dev->dev, PXA3XX_GCU_BATCH_WORDS * 4,
+ buffer->ptr, buffer->phys);
+
+ kfree(buffer);
+
+ buffer = next;
+ }
+
+ priv->free = NULL;
+}
+
+static int __devinit
+pxa3xx_gcu_probe(struct platform_device *dev)
+{
+ int i, ret, irq;
+ struct resource *r;
+ struct pxa3xx_gcu_priv *priv;
+
+ priv = kzalloc(sizeof(struct pxa3xx_gcu_priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ for (i = 0; i < 8; i++) {
+ ret = add_buffer(dev, priv);
+ if (ret) {
+ dev_err(&dev->dev, "failed to allocate DMA memory\n");
+ goto err_free_priv;
+ }
+ }
+
+ init_waitqueue_head(&priv->wait_idle);
+ init_waitqueue_head(&priv->wait_free);
+ spin_lock_init(&priv->spinlock);
+
+ /* we allocate the misc device structure as part of our own allocation,
+ * so we can get a pointer to our priv structure later on with
+ * container_of(). This isn't really necessary as we have a fixed minor
+ * number anyway, but this is to avoid statics. */
+
+ priv->misc_fops.owner = THIS_MODULE;
+ priv->misc_fops.write = pxa3xx_gcu_misc_write;
+ priv->misc_fops.unlocked_ioctl = pxa3xx_gcu_misc_ioctl;
+ priv->misc_fops.mmap = pxa3xx_gcu_misc_mmap;
+
+ priv->misc_dev.minor = MISCDEV_MINOR,
+ priv->misc_dev.name = DRV_NAME,
+ priv->misc_dev.fops = &priv->misc_fops,
+
+ /* register misc device */
+ ret = misc_register(&priv->misc_dev);
+ if (ret < 0) {
+ dev_err(&dev->dev, "misc_register() for minor %d failed\n",
+ MISCDEV_MINOR);
+ goto err_free_priv;
+ }
+
+ /* handle IO resources */
+ r = platform_get_resource(dev, IORESOURCE_MEM, 0);
+ if (r == NULL) {
+ dev_err(&dev->dev, "no I/O memory resource defined\n");
+ ret = -ENODEV;
+ goto err_misc_deregister;
+ }
+
+ if (!request_mem_region(r->start, resource_size(r), dev->name)) {
+ dev_err(&dev->dev, "failed to request I/O memory\n");
+ ret = -EBUSY;
+ goto err_misc_deregister;
+ }
+
+ priv->mmio_base = ioremap_nocache(r->start, resource_size(r));
+ if (!priv->mmio_base) {
+ dev_err(&dev->dev, "failed to map I/O memory\n");
+ ret = -EBUSY;
+ goto err_free_mem_region;
+ }
+
+ /* allocate dma memory */
+ priv->shared = dma_alloc_coherent(&dev->dev, SHARED_SIZE,
+ &priv->shared_phys, GFP_KERNEL);
+
+ if (!priv->shared) {
+ dev_err(&dev->dev, "failed to allocate DMA memory\n");
+ ret = -ENOMEM;
+ goto err_free_io;
+ }
+
+ /* enable the clock */
+ priv->clk = clk_get(&dev->dev, NULL);
+ if (IS_ERR(priv->clk)) {
+ dev_err(&dev->dev, "failed to get clock\n");
+ ret = -ENODEV;
+ goto err_free_dma;
+ }
+
+ ret = clk_enable(priv->clk);
+ if (ret < 0) {
+ dev_err(&dev->dev, "failed to enable clock\n");
+ goto err_put_clk;
+ }
+
+ /* request the IRQ */
+ irq = platform_get_irq(dev, 0);
+ if (irq < 0) {
+ dev_err(&dev->dev, "no IRQ defined\n");
+ ret = -ENODEV;
+ goto err_put_clk;
+ }
+
+ ret = request_irq(irq, pxa3xx_gcu_handle_irq,
+ IRQF_DISABLED, DRV_NAME, priv);
+ if (ret) {
+ dev_err(&dev->dev, "request_irq failed\n");
+ ret = -EBUSY;
+ goto err_put_clk;
+ }
+
+ platform_set_drvdata(dev, priv);
+ priv->resource_mem = r;
+ pxa3xx_gcu_reset(priv);
+ pxa3xx_gcu_init_debug_timer();
+
+ dev_info(&dev->dev, "registered @0x%p, DMA 0x%p (%d bytes), IRQ %d\n",
+ (void *) r->start, (void *) priv->shared_phys,
+ SHARED_SIZE, irq);
+ return 0;
+
+err_put_clk:
+ clk_disable(priv->clk);
+ clk_put(priv->clk);
+
+err_free_dma:
+ dma_free_coherent(&dev->dev, SHARED_SIZE,
+ priv->shared, priv->shared_phys);
+
+err_free_io:
+ iounmap(priv->mmio_base);
+
+err_free_mem_region:
+ release_mem_region(r->start, resource_size(r));
+
+err_misc_deregister:
+ misc_deregister(&priv->misc_dev);
+
+err_free_priv:
+ platform_set_drvdata(dev, NULL);
+ free_buffers(dev, priv);
+ kfree(priv);
+ return ret;
+}
+
+static int __devexit
+pxa3xx_gcu_remove(struct platform_device *dev)
+{
+ struct pxa3xx_gcu_priv *priv = platform_get_drvdata(dev);
+ struct resource *r = priv->resource_mem;
+
+ pxa3xx_gcu_wait_idle(priv);
+
+ misc_deregister(&priv->misc_dev);
+ dma_free_coherent(&dev->dev, SHARED_SIZE,
+ priv->shared, priv->shared_phys);
+ iounmap(priv->mmio_base);
+ release_mem_region(r->start, resource_size(r));
+ platform_set_drvdata(dev, NULL);
+ clk_disable(priv->clk);
+ free_buffers(dev, priv);
+ kfree(priv);
+
+ return 0;
+}
+
+static struct platform_driver pxa3xx_gcu_driver = {
+ .probe = pxa3xx_gcu_probe,
+ .remove = __devexit_p(pxa3xx_gcu_remove),
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = DRV_NAME,
+ },
+};
+
+static int __init
+pxa3xx_gcu_init(void)
+{
+ return platform_driver_register(&pxa3xx_gcu_driver);
+}
+
+static void __exit
+pxa3xx_gcu_exit(void)
+{
+ platform_driver_unregister(&pxa3xx_gcu_driver);
+}
+
+module_init(pxa3xx_gcu_init);
+module_exit(pxa3xx_gcu_exit);
+
+MODULE_DESCRIPTION("PXA3xx graphics controller unit driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(MISCDEV_MINOR);
+MODULE_AUTHOR("Janine Kropp <nin@directfb.org>, "
+ "Denis Oliver Kropp <dok@directfb.org>, "
+ "Daniel Mack <daniel@caiaq.de>");
diff --git a/drivers/video/pxa3xx-gcu.h b/drivers/video/pxa3xx-gcu.h
new file mode 100644
index 000000000000..0428ed03dc49
--- /dev/null
+++ b/drivers/video/pxa3xx-gcu.h
@@ -0,0 +1,38 @@
+#ifndef __PXA3XX_GCU_H__
+#define __PXA3XX_GCU_H__
+
+#include <linux/types.h>
+
+/* Number of 32bit words in display list (ring buffer). */
+#define PXA3XX_GCU_BUFFER_WORDS ((256 * 1024 - 256) / 4)
+
+/* To be increased when breaking the ABI */
+#define PXA3XX_GCU_SHARED_MAGIC 0x30000001
+
+#define PXA3XX_GCU_BATCH_WORDS 8192
+
+struct pxa3xx_gcu_shared {
+ u32 buffer[PXA3XX_GCU_BUFFER_WORDS];
+
+ bool hw_running;
+
+ unsigned long buffer_phys;
+
+ unsigned int num_words;
+ unsigned int num_writes;
+ unsigned int num_done;
+ unsigned int num_interrupts;
+ unsigned int num_wait_idle;
+ unsigned int num_wait_free;
+ unsigned int num_idle;
+
+ u32 magic;
+};
+
+/* Initialization and synchronization.
+ * Hardware is started upon write(). */
+#define PXA3XX_GCU_IOCTL_RESET _IO('G', 0)
+#define PXA3XX_GCU_IOCTL_WAIT_IDLE _IO('G', 2)
+
+#endif /* __PXA3XX_GCU_H__ */
+
generated by cgit v1.2.3 (git 2.0.4) at 2024-11-09 01:53:24 +0000