initial_commit

3 files changed, 1054 insertions, 0 deletions

diff --git a/drivers/mxc/vpu/Kconfig b/drivers/mxc/vpu/Kconfig
new file mode 100644
index 00000000..6562697f
--- /dev/null
+++ b/drivers/mxc/vpu/Kconfig
@@ -0,0 +1,31 @@
+#
+# Codec configuration
+#
+
+menu "MXC VPU(Video Processing Unit) support"
+
+config MXC_VPU
+	  tristate "Support for MXC VPU(Video Processing Unit)"
+	  depends on (ARCH_MX3 || ARCH_MX27 || ARCH_MX37 || ARCH_MX5 || ARCH_MX6)
+	  default y
+	---help---
+	  The VPU codec device provides codec function for H.264/MPEG4/H.263,
+	  as well as MPEG2/VC-1/DivX on some platforms.
+
+config MXC_VPU_DEBUG
+	bool "MXC VPU debugging"
+	depends on MXC_VPU != n
+	help
+	  This is an option for the developers; most people should
+	  say N here.  This enables MXC VPU driver debugging.
+
+config MX6_VPU_352M
+	bool "MX6 VPU 352M"
+	depends on MXC_VPU
+	default n
+	help
+	 Increase VPU frequncy to 352M, the config will disable bus frequency
+	 adjust dynamic, and CPU lowest setpoint will be 352Mhz.
+	 This config is used for special VPU use case.
+
+endmenu
diff --git a/drivers/mxc/vpu/Makefile b/drivers/mxc/vpu/Makefile
new file mode 100644
index 00000000..1a821f49
--- /dev/null
+++ b/drivers/mxc/vpu/Makefile
@@ -0,0 +1,9 @@
+#
+# Makefile for the VPU drivers.
+#
+
+obj-$(CONFIG_MXC_VPU)                  += mxc_vpu.o
+
+ifeq ($(CONFIG_MXC_VPU_DEBUG),y)
+EXTRA_CFLAGS += -DDEBUG
+endif
diff --git a/drivers/mxc/vpu/mxc_vpu.c b/drivers/mxc/vpu/mxc_vpu.c
new file mode 100644
index 00000000..d73b8699
--- /dev/null
+++ b/drivers/mxc/vpu/mxc_vpu.c
@@ -0,0 +1,1014 @@
+/*
+ * Copyright 2006-2013 Freescale Semiconductor, Inc. All Rights Reserved.
+ */
+
+/*
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+/*!
+ * @file mxc_vpu.c
+ *
+ * @brief VPU system initialization and file operation implementation
+ *
+ * @ingroup VPU
+ */
+
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/stat.h>
+#include <linux/platform_device.h>
+#include <linux/kdev_t.h>
+#include <linux/dma-mapping.h>
+#include <linux/iram_alloc.h>
+#include <linux/wait.h>
+#include <linux/list.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/fsl_devices.h>
+#include <linux/uaccess.h>
+#include <linux/io.h>
+#include <linux/slab.h>
+#include <linux/workqueue.h>
+#include <linux/sched.h>
+#include <linux/vmalloc.h>
+#include <linux/regulator/consumer.h>
+#include <linux/page-flags.h>
+#include <linux/mm_types.h>
+#include <linux/types.h>
+#include <linux/memblock.h>
+#include <linux/memory.h>
+#include <asm/page.h>
+#include <asm/sizes.h>
+#include <mach/clock.h>
+#include <mach/hardware.h>
+
+#include <mach/mxc_vpu.h>
+
+/* Define one new pgprot which combined uncached and XN(never executable) */
+#define pgprot_noncachedxn(prot) \
+	__pgprot_modify(prot, L_PTE_MT_MASK, L_PTE_MT_UNCACHED | L_PTE_XN)
+
+struct vpu_priv {
+	struct fasync_struct *async_queue;
+	struct work_struct work;
+	struct workqueue_struct *workqueue;
+	struct mutex lock;
+};
+
+/* To track the allocated memory buffer */
+typedef struct memalloc_record {
+	struct list_head list;
+	struct vpu_mem_desc mem;
+} memalloc_record;
+
+struct iram_setting {
+	u32 start;
+	u32 end;
+};
+
+static LIST_HEAD(head);
+
+static int vpu_major;
+static int vpu_clk_usercount;
+static struct class *vpu_class;
+static struct vpu_priv vpu_data;
+static u8 open_count;
+static struct clk *vpu_clk;
+static struct vpu_mem_desc bitwork_mem = { 0 };
+static struct vpu_mem_desc pic_para_mem = { 0 };
+static struct vpu_mem_desc user_data_mem = { 0 };
+static struct vpu_mem_desc share_mem = { 0 };
+static struct vpu_mem_desc vshare_mem = { 0 };
+
+static void __iomem *vpu_base;
+static int vpu_ipi_irq;
+static u32 phy_vpu_base_addr;
+static phys_addr_t top_address_DRAM;
+static struct mxc_vpu_platform_data *vpu_plat;
+
+/* IRAM setting */
+static struct iram_setting iram;
+
+/* implement the blocking ioctl */
+static int irq_status;
+static int codec_done;
+static wait_queue_head_t vpu_queue;
+
+#ifdef CONFIG_SOC_IMX6Q
+#define MXC_VPU_HAS_JPU
+#endif
+
+#ifdef MXC_VPU_HAS_JPU
+static int vpu_jpu_irq;
+#endif
+
+static unsigned int regBk[64];
+static struct regulator *vpu_regulator;
+
+#define	READ_REG(x)		__raw_readl(vpu_base + x)
+#define	WRITE_REG(val, x)	__raw_writel(val, vpu_base + x)
+
+/*!
+ * Private function to alloc dma buffer
+ * @return status  0 success.
+ */
+static int vpu_alloc_dma_buffer(struct vpu_mem_desc *mem)
+{
+	mem->cpu_addr = (unsigned long)
+	    dma_alloc_coherent(NULL, PAGE_ALIGN(mem->size),
+			       (dma_addr_t *) (&mem->phy_addr),
+			       GFP_DMA | GFP_KERNEL);
+	pr_debug("[ALLOC] mem alloc cpu_addr = 0x%x\n", mem->cpu_addr);
+	if ((void *)(mem->cpu_addr) == NULL) {
+		printk(KERN_ERR "Physical memory allocation error!\n");
+		return -1;
+	}
+	return 0;
+}
+
+/*!
+ * Private function to free dma buffer
+ */
+static void vpu_free_dma_buffer(struct vpu_mem_desc *mem)
+{
+	if (mem->cpu_addr != 0) {
+		dma_free_coherent(0, PAGE_ALIGN(mem->size),
+				  (void *)mem->cpu_addr, mem->phy_addr);
+	}
+}
+
+/*!
+ * Private function to free buffers
+ * @return status  0 success.
+ */
+static int vpu_free_buffers(void)
+{
+	struct memalloc_record *rec, *n;
+	struct vpu_mem_desc mem;
+
+	list_for_each_entry_safe(rec, n, &head, list) {
+		mem = rec->mem;
+		if (mem.cpu_addr != 0) {
+			vpu_free_dma_buffer(&mem);
+			pr_debug("[FREE] freed paddr=0x%08X\n", mem.phy_addr);
+			/* delete from list */
+			list_del(&rec->list);
+			kfree(rec);
+		}
+	}
+
+	return 0;
+}
+
+static inline void vpu_worker_callback(struct work_struct *w)
+{
+	struct vpu_priv *dev = container_of(w, struct vpu_priv,
+				work);
+
+	if (dev->async_queue)
+		kill_fasync(&dev->async_queue, SIGIO, POLL_IN);
+
+	irq_status = 1;
+	/*
+	 * Clock is gated on when dec/enc started, gate it off when
+	 * codec is done.
+	 */
+	if (codec_done) {
+		codec_done = 0;
+	}
+
+	wake_up_interruptible(&vpu_queue);
+}
+
+/*!
+ * @brief vpu interrupt handler
+ */
+static irqreturn_t vpu_ipi_irq_handler(int irq, void *dev_id)
+{
+	struct vpu_priv *dev = dev_id;
+	unsigned long reg;
+
+	reg = READ_REG(BIT_INT_REASON);
+	if (reg & 0x8)
+		codec_done = 1;
+	WRITE_REG(0x1, BIT_INT_CLEAR);
+
+	queue_work(dev->workqueue, &dev->work);
+
+	return IRQ_HANDLED;
+}
+
+/*!
+ * @brief vpu jpu interrupt handler
+ */
+#ifdef MXC_VPU_HAS_JPU
+static irqreturn_t vpu_jpu_irq_handler(int irq, void *dev_id)
+{
+	struct vpu_priv *dev = dev_id;
+	unsigned long reg;
+
+	reg = READ_REG(MJPEG_PIC_STATUS_REG);
+	if (reg & 0x3)
+		codec_done = 1;
+
+	queue_work(dev->workqueue, &dev->work);
+
+	return IRQ_HANDLED;
+}
+#endif
+
+/*!
+ * @brief check phy memory prepare to pass to vpu is valid or not, we
+ * already address some issue that if pass a wrong address to vpu
+ * (like virtual address), system will hang.
+ *
+ * @return true return is a valid phy memory address, false return not.
+ */
+bool vpu_is_valid_phy_memory(u32 paddr)
+{
+	if (paddr > top_address_DRAM)
+		return false;
+
+	return true;
+}
+
+/*!
+ * @brief open function for vpu file operation
+ *
+ * @return  0 on success or negative error code on error
+ */
+static int vpu_open(struct inode *inode, struct file *filp)
+{
+
+	mutex_lock(&vpu_data.lock);
+
+	if (open_count++ == 0 && !IS_ERR(vpu_regulator))
+		regulator_enable(vpu_regulator);
+
+	filp->private_data = (void *)(&vpu_data);
+	mutex_unlock(&vpu_data.lock);
+	return 0;
+}
+
+/*!
+ * @brief IO ctrl function for vpu file operation
+ * @param cmd IO ctrl command
+ * @return  0 on success or negative error code on error
+ */
+static long vpu_ioctl(struct file *filp, u_int cmd,
+		     u_long arg)
+{
+	int ret = 0;
+
+	switch (cmd) {
+	case VPU_IOC_PHYMEM_ALLOC:
+		{
+			struct memalloc_record *rec;
+
+			rec = kzalloc(sizeof(*rec), GFP_KERNEL);
+			if (!rec)
+				return -ENOMEM;
+
+			ret = copy_from_user(&(rec->mem),
+					     (struct vpu_mem_desc *)arg,
+					     sizeof(struct vpu_mem_desc));
+			if (ret) {
+				kfree(rec);
+				return -EFAULT;
+			}
+
+			pr_debug("[ALLOC] mem alloc size = 0x%x\n",
+				 rec->mem.size);
+
+			ret = vpu_alloc_dma_buffer(&(rec->mem));
+			if (ret == -1) {
+				kfree(rec);
+				printk(KERN_ERR
+				       "Physical memory allocation error!\n");
+				break;
+			}
+			ret = copy_to_user((void __user *)arg, &(rec->mem),
+					   sizeof(struct vpu_mem_desc));
+			if (ret) {
+				kfree(rec);
+				ret = -EFAULT;
+				break;
+			}
+
+			mutex_lock(&vpu_data.lock);
+			list_add(&rec->list, &head);
+			mutex_unlock(&vpu_data.lock);
+
+			break;
+		}
+	case VPU_IOC_PHYMEM_FREE:
+		{
+			struct memalloc_record *rec, *n;
+			struct vpu_mem_desc vpu_mem;
+
+			ret = copy_from_user(&vpu_mem,
+					     (struct vpu_mem_desc *)arg,
+					     sizeof(struct vpu_mem_desc));
+			if (ret)
+				return -EACCES;
+
+			pr_debug("[FREE] mem freed cpu_addr = 0x%x\n",
+				 vpu_mem.cpu_addr);
+			if ((void *)vpu_mem.cpu_addr != NULL) {
+				vpu_free_dma_buffer(&vpu_mem);
+			}
+
+			mutex_lock(&vpu_data.lock);
+			list_for_each_entry_safe(rec, n, &head, list) {
+				if (rec->mem.cpu_addr == vpu_mem.cpu_addr) {
+					/* delete from list */
+					list_del(&rec->list);
+					kfree(rec);
+					break;
+				}
+			}
+			mutex_unlock(&vpu_data.lock);
+
+			break;
+		}
+	case VPU_IOC_WAIT4INT:
+		{
+			u_long timeout = (u_long) arg;
+			if (!wait_event_interruptible_timeout
+			    (vpu_queue, irq_status != 0,
+			     msecs_to_jiffies(timeout))) {
+				printk(KERN_WARNING "VPU blocking: timeout.\n");
+				ret = -ETIME;
+			} else if (signal_pending(current)) {
+				printk(KERN_WARNING
+				       "VPU interrupt received.\n");
+				ret = -ERESTARTSYS;
+			} else
+				irq_status = 0;
+			break;
+		}
+	case VPU_IOC_IRAM_SETTING:
+		{
+			ret = copy_to_user((void __user *)arg, &iram,
+					   sizeof(struct iram_setting));
+			if (ret)
+				ret = -EFAULT;
+
+			break;
+		}
+	case VPU_IOC_CLKGATE_SETTING:
+		{
+			u32 clkgate_en;
+
+			if (get_user(clkgate_en, (u32 __user *) arg))
+				return -EFAULT;
+
+			if (clkgate_en) {
+				clk_enable(vpu_clk);
+			} else {
+				clk_disable(vpu_clk);
+			}
+
+			break;
+		}
+	case VPU_IOC_GET_SHARE_MEM:
+		{
+			mutex_lock(&vpu_data.lock);
+			if (share_mem.cpu_addr != 0) {
+				ret = copy_to_user((void __user *)arg,
+						   &share_mem,
+						   sizeof(struct vpu_mem_desc));
+				mutex_unlock(&vpu_data.lock);
+				break;
+			} else {
+				if (copy_from_user(&share_mem,
+						   (struct vpu_mem_desc *)arg,
+						 sizeof(struct vpu_mem_desc))) {
+					mutex_unlock(&vpu_data.lock);
+					return -EFAULT;
+				}
+				if (vpu_alloc_dma_buffer(&share_mem) == -1)
+					ret = -EFAULT;
+				else {
+					if (copy_to_user((void __user *)arg,
+							 &share_mem,
+							 sizeof(struct
+								vpu_mem_desc)))
+						ret = -EFAULT;
+				}
+			}
+			mutex_unlock(&vpu_data.lock);
+			break;
+		}
+	case VPU_IOC_REQ_VSHARE_MEM:
+		{
+			mutex_lock(&vpu_data.lock);
+			if (vshare_mem.cpu_addr != 0) {
+				ret = copy_to_user((void __user *)arg,
+						   &vshare_mem,
+						   sizeof(struct vpu_mem_desc));
+				mutex_unlock(&vpu_data.lock);
+				break;
+			} else {
+				if (copy_from_user(&vshare_mem,
+						   (struct vpu_mem_desc *)arg,
+						   sizeof(struct
+							  vpu_mem_desc))) {
+					mutex_unlock(&vpu_data.lock);
+					return -EFAULT;
+				}
+				/* vmalloc shared memory if not allocated */
+				if (!vshare_mem.cpu_addr)
+					vshare_mem.cpu_addr =
+					    (unsigned long)
+					    vmalloc_user(vshare_mem.size);
+				if (copy_to_user
+				     ((void __user *)arg, &vshare_mem,
+				     sizeof(struct vpu_mem_desc)))
+					ret = -EFAULT;
+			}
+			mutex_unlock(&vpu_data.lock);
+			break;
+		}
+	case VPU_IOC_GET_WORK_ADDR:
+		{
+			if (bitwork_mem.cpu_addr != 0) {
+				ret =
+				    copy_to_user((void __user *)arg,
+						 &bitwork_mem,
+						 sizeof(struct vpu_mem_desc));
+				break;
+			} else {
+				if (copy_from_user(&bitwork_mem,
+						   (struct vpu_mem_desc *)arg,
+						   sizeof(struct vpu_mem_desc)))
+					return -EFAULT;
+
+				if (vpu_alloc_dma_buffer(&bitwork_mem) == -1)
+					ret = -EFAULT;
+				else if (copy_to_user((void __user *)arg,
+						      &bitwork_mem,
+						      sizeof(struct
+							     vpu_mem_desc)))
+					ret = -EFAULT;
+			}
+			break;
+		}
+	/*
+	 * The following two ioctl is used when user allocates working buffer
+	 * and register it to vpu driver.
+	 */
+	case VPU_IOC_QUERY_BITWORK_MEM:
+		{
+			if (copy_to_user((void __user *)arg,
+					 &bitwork_mem,
+					 sizeof(struct vpu_mem_desc)))
+				ret = -EFAULT;
+			break;
+		}
+	case VPU_IOC_SET_BITWORK_MEM:
+		{
+			if (copy_from_user(&bitwork_mem,
+					   (struct vpu_mem_desc *)arg,
+					   sizeof(struct vpu_mem_desc)))
+				ret = -EFAULT;
+			break;
+		}
+	case VPU_IOC_SYS_SW_RESET:
+		{
+			if (vpu_plat->reset)
+				vpu_plat->reset();
+
+			break;
+		}
+	case VPU_IOC_REG_DUMP:
+		break;
+	case VPU_IOC_PHYMEM_DUMP:
+		break;
+	case VPU_IOC_PHYMEM_CHECK:
+	{
+		struct vpu_mem_desc check_memory;
+		ret = copy_from_user(&check_memory,
+				     (void __user *)arg,
+				     sizeof(struct vpu_mem_desc));
+		if (ret != 0) {
+			printk(KERN_ERR "copy from user failure:%d\n", ret);
+			ret = -EFAULT;
+			break;
+		}
+		ret = vpu_is_valid_phy_memory((u32)check_memory.phy_addr);
+
+		pr_debug("vpu: memory phy:0x%x %s phy memory\n",
+		       check_memory.phy_addr, (ret ? "is" : "isn't"));
+		/* borrow .size to pass back the result. */
+		check_memory.size = ret;
+		ret = copy_to_user((void __user *)arg, &check_memory,
+				   sizeof(struct vpu_mem_desc));
+		if (ret) {
+			ret = -EFAULT;
+			break;
+		}
+		break;
+	}
+	default:
+		{
+			printk(KERN_ERR "No such IOCTL, cmd is %d\n", cmd);
+			ret = -EINVAL;
+			break;
+		}
+	}
+	return ret;
+}
+
+/*!
+ * @brief Release function for vpu file operation
+ * @return  0 on success or negative error code on error
+ */
+static int vpu_release(struct inode *inode, struct file *filp)
+{
+	unsigned long timeout;
+
+	mutex_lock(&vpu_data.lock);
+	if (open_count > 0 && !(--open_count)) {
+
+		/* Wait for vpu go to idle state */
+		clk_enable(vpu_clk);
+		if (READ_REG(BIT_CUR_PC)) {
+
+			timeout = jiffies + HZ;
+			while (READ_REG(BIT_BUSY_FLAG)) {
+				msleep(1);
+				if (time_after(jiffies, timeout)) {
+					printk(KERN_WARNING "VPU timeout during release\n");
+					break;
+				}
+			}
+			clk_disable(vpu_clk);
+
+			/* Clean up interrupt */
+			cancel_work_sync(&vpu_data.work);
+			flush_workqueue(vpu_data.workqueue);
+			irq_status = 0;
+
+			clk_enable(vpu_clk);
+			if (READ_REG(BIT_BUSY_FLAG)) {
+
+				if (cpu_is_mx51() || cpu_is_mx53()) {
+					printk(KERN_ERR
+						"fatal error: can't gate/power off when VPU is busy\n");
+					clk_disable(vpu_clk);
+					mutex_unlock(&vpu_data.lock);
+					return -EFAULT;
+				}
+
+#ifdef CONFIG_SOC_IMX6Q
+				if (cpu_is_mx6dl() || cpu_is_mx6q()) {
+					WRITE_REG(0x11, 0x10F0);
+					timeout = jiffies + HZ;
+					while (READ_REG(0x10F4) != 0x77) {
+						msleep(1);
+						if (time_after(jiffies, timeout))
+							break;
+					}
+
+					if (READ_REG(0x10F4) != 0x77) {
+						printk(KERN_ERR
+							"fatal error: can't gate/power off when VPU is busy\n");
+						WRITE_REG(0x0, 0x10F0);
+						clk_disable(vpu_clk);
+						mutex_unlock(&vpu_data.lock);
+						return -EFAULT;
+					} else {
+						if (vpu_plat->reset)
+							vpu_plat->reset();
+					}
+				}
+#endif
+			}
+		}
+		clk_disable(vpu_clk);
+
+		vpu_free_buffers();
+
+		/* Free shared memory when vpu device is idle */
+		vpu_free_dma_buffer(&share_mem);
+		share_mem.cpu_addr = 0;
+		vfree((void *)vshare_mem.cpu_addr);
+		vshare_mem.cpu_addr = 0;
+	}
+	mutex_unlock(&vpu_data.lock);
+
+	return 0;
+}
+
+/*!
+ * @brief fasync function for vpu file operation
+ * @return  0 on success or negative error code on error
+ */
+static int vpu_fasync(int fd, struct file *filp, int mode)
+{
+	struct vpu_priv *dev = (struct vpu_priv *)filp->private_data;
+	return fasync_helper(fd, filp, mode, &dev->async_queue);
+}
+
+/*!
+ * @brief memory map function of harware registers for vpu file operation
+ * @return  0 on success or negative error code on error
+ */
+static int vpu_map_hwregs(struct file *fp, struct vm_area_struct *vm)
+{
+	unsigned long pfn;
+
+	vm->vm_flags |= VM_IO | VM_RESERVED;
+	/*
+	 * Since vpu registers have been mapped with ioremap() at probe
+	 * which L_PTE_XN is 1, and the same physical address must be
+	 * mapped multiple times with same type, so set L_PTE_XN to 1 here.
+	 * Otherwise, there may be unexpected result in video codec.
+	 */
+	vm->vm_page_prot = pgprot_noncachedxn(vm->vm_page_prot);
+	pfn = phy_vpu_base_addr >> PAGE_SHIFT;
+	pr_debug("size=0x%x,  page no.=0x%x\n",
+		 (int)(vm->vm_end - vm->vm_start), (int)pfn);
+	return remap_pfn_range(vm, vm->vm_start, pfn, vm->vm_end - vm->vm_start,
+			       vm->vm_page_prot) ? -EAGAIN : 0;
+}
+
+/*!
+ * @brief memory map function of memory for vpu file operation
+ * @return  0 on success or negative error code on error
+ */
+static int vpu_map_dma_mem(struct file *fp, struct vm_area_struct *vm)
+{
+	int request_size;
+	request_size = vm->vm_end - vm->vm_start;
+
+	pr_debug(" start=0x%x, pgoff=0x%x, size=0x%x\n",
+		 (unsigned int)(vm->vm_start), (unsigned int)(vm->vm_pgoff),
+		 request_size);
+
+	vm->vm_flags |= VM_IO | VM_RESERVED;
+	vm->vm_page_prot = pgprot_writecombine(vm->vm_page_prot);
+
+	return remap_pfn_range(vm, vm->vm_start, vm->vm_pgoff,
+			       request_size, vm->vm_page_prot) ? -EAGAIN : 0;
+
+}
+
+/* !
+ * @brief memory map function of vmalloced share memory
+ * @return  0 on success or negative error code on error
+ */
+static int vpu_map_vshare_mem(struct file *fp, struct vm_area_struct *vm)
+{
+	int ret = -EINVAL;
+
+	ret = remap_vmalloc_range(vm, (void *)(vm->vm_pgoff << PAGE_SHIFT), 0);
+	vm->vm_flags |= VM_IO;
+
+	return ret;
+}
+/*!
+ * @brief memory map interface for vpu file operation
+ * @return  0 on success or negative error code on error
+ */
+static int vpu_mmap(struct file *fp, struct vm_area_struct *vm)
+{
+	unsigned long offset;
+
+	offset = vshare_mem.cpu_addr >> PAGE_SHIFT;
+
+	if (vm->vm_pgoff && (vm->vm_pgoff == offset))
+		return vpu_map_vshare_mem(fp, vm);
+	else if (vm->vm_pgoff)
+		return vpu_map_dma_mem(fp, vm);
+	else
+		return vpu_map_hwregs(fp, vm);
+}
+
+struct file_operations vpu_fops = {
+	.owner = THIS_MODULE,
+	.open = vpu_open,
+	.unlocked_ioctl = vpu_ioctl,
+	.release = vpu_release,
+	.fasync = vpu_fasync,
+	.mmap = vpu_mmap,
+};
+
+/*!
+ * This function is called by the driver framework to initialize the vpu device.
+ * @param   dev The device structure for the vpu passed in by the framework.
+ * @return   0 on success or negative error code on error
+ */
+static int vpu_dev_probe(struct platform_device *pdev)
+{
+	int err = 0;
+	struct device *temp_class;
+	struct resource *res;
+	unsigned long addr = 0;
+
+	vpu_plat = pdev->dev.platform_data;
+
+	if (vpu_plat && vpu_plat->iram_enable && vpu_plat->iram_size)
+		iram_alloc(vpu_plat->iram_size, &addr);
+	if (addr == 0)
+		iram.start = iram.end = 0;
+	else {
+		iram.start = addr;
+		iram.end = addr +  vpu_plat->iram_size - 1;
+	}
+
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "vpu_regs");
+	if (!res) {
+		printk(KERN_ERR "vpu: unable to get vpu base addr\n");
+		return -ENODEV;
+	}
+	phy_vpu_base_addr = res->start;
+	vpu_base = ioremap(res->start, res->end - res->start);
+
+	vpu_major = register_chrdev(vpu_major, "mxc_vpu", &vpu_fops);
+	if (vpu_major < 0) {
+		printk(KERN_ERR "vpu: unable to get a major for VPU\n");
+		err = -EBUSY;
+		goto error;
+	}
+
+	vpu_class = class_create(THIS_MODULE, "mxc_vpu");
+	if (IS_ERR(vpu_class)) {
+		err = PTR_ERR(vpu_class);
+		goto err_out_chrdev;
+	}
+
+	temp_class = device_create(vpu_class, NULL, MKDEV(vpu_major, 0),
+				   NULL, "mxc_vpu");
+	if (IS_ERR(temp_class)) {
+		err = PTR_ERR(temp_class);
+		goto err_out_class;
+	}
+
+	vpu_clk = clk_get(&pdev->dev, "vpu_clk");
+	if (IS_ERR(vpu_clk)) {
+		err = -ENOENT;
+		goto err_out_class;
+	}
+
+	vpu_ipi_irq = platform_get_irq_byname(pdev, "vpu_ipi_irq");
+	if (vpu_ipi_irq < 0) {
+		printk(KERN_ERR "vpu: unable to get vpu interrupt\n");
+		err = -ENXIO;
+		goto err_out_class;
+	}
+	err = request_irq(vpu_ipi_irq, vpu_ipi_irq_handler, 0, "VPU_CODEC_IRQ",
+			  (void *)(&vpu_data));
+	if (err)
+		goto err_out_class;
+	vpu_regulator = regulator_get(NULL, "cpu_vddvpu");
+	if (IS_ERR(vpu_regulator)) {
+		printk(KERN_ERR
+			"%s: failed to get vpu regulator\n", __func__);
+		goto err_out_class;
+	}
+
+#ifdef MXC_VPU_HAS_JPU
+	vpu_jpu_irq = platform_get_irq_byname(pdev, "vpu_jpu_irq");
+	if (vpu_jpu_irq < 0) {
+		printk(KERN_ERR "vpu: unable to get vpu jpu interrupt\n");
+		err = -ENXIO;
+		free_irq(vpu_ipi_irq, &vpu_data);
+		goto err_out_class;
+	}
+	err = request_irq(vpu_jpu_irq, vpu_jpu_irq_handler, IRQF_TRIGGER_RISING,
+			  "VPU_JPG_IRQ", (void *)(&vpu_data));
+	if (err) {
+		free_irq(vpu_ipi_irq, &vpu_data);
+		goto err_out_class;
+	}
+#endif
+
+	vpu_data.workqueue = create_workqueue("vpu_wq");
+	INIT_WORK(&vpu_data.work, vpu_worker_callback);
+	mutex_init(&vpu_data.lock);
+	printk(KERN_INFO "VPU initialized\n");
+	goto out;
+
+      err_out_class:
+	device_destroy(vpu_class, MKDEV(vpu_major, 0));
+	class_destroy(vpu_class);
+      err_out_chrdev:
+	unregister_chrdev(vpu_major, "mxc_vpu");
+      error:
+	iounmap(vpu_base);
+      out:
+	return err;
+}
+
+static int vpu_dev_remove(struct platform_device *pdev)
+{
+	free_irq(vpu_ipi_irq, &vpu_data);
+#ifdef MXC_VPU_HAS_JPU
+	free_irq(vpu_jpu_irq, &vpu_data);
+#endif
+	cancel_work_sync(&vpu_data.work);
+	flush_workqueue(vpu_data.workqueue);
+	destroy_workqueue(vpu_data.workqueue);
+
+	iounmap(vpu_base);
+	if (vpu_plat && vpu_plat->iram_enable && vpu_plat->iram_size)
+		iram_free(iram.start,  vpu_plat->iram_size);
+	if (!IS_ERR(vpu_regulator))
+		regulator_put(vpu_regulator);
+	return 0;
+}
+
+#ifdef CONFIG_PM
+static int vpu_suspend(struct platform_device *pdev, pm_message_t state)
+{
+	int i;
+	unsigned long timeout;
+
+	if (!IS_ERR(vpu_regulator))
+		regulator_enable(vpu_regulator);
+	/* Wait for vpu go to idle state, suspect vpu cannot be changed
+	   to idle state after about 1 sec */
+	if (open_count > 0) {
+		timeout = jiffies + HZ;
+		clk_enable(vpu_clk);
+		while (READ_REG(BIT_BUSY_FLAG)) {
+			msleep(1);
+			if (time_after(jiffies, timeout))
+				goto out;
+		}
+		clk_disable(vpu_clk);
+	}
+
+	/* Make sure clock is disabled before suspend */
+	vpu_clk_usercount = clk_get_usecount(vpu_clk);
+	for (i = 0; i < vpu_clk_usercount; i++)
+		clk_disable(vpu_clk);
+
+	if (cpu_is_mx53())
+		return 0;
+
+	if (bitwork_mem.cpu_addr != 0) {
+		clk_enable(vpu_clk);
+		/* Save 64 registers from BIT_CODE_BUF_ADDR */
+		for (i = 0; i < 64; i++)
+			regBk[i] = READ_REG(BIT_CODE_BUF_ADDR + (i * 4));
+		clk_disable(vpu_clk);
+	}
+
+	if (vpu_plat->pg)
+		vpu_plat->pg(1);
+
+	if (!IS_ERR(vpu_regulator))
+		regulator_disable(vpu_regulator);
+	return 0;
+
+out:
+	clk_disable(vpu_clk);
+	if (!IS_ERR(vpu_regulator))
+		regulator_disable(vpu_regulator);
+	return -EAGAIN;
+
+}
+
+static int vpu_resume(struct platform_device *pdev)
+{
+	int i;
+
+	if (cpu_is_mx53())
+		goto recover_clk;
+
+	if (!IS_ERR(vpu_regulator))
+		regulator_enable(vpu_regulator);
+	if (vpu_plat->pg)
+		vpu_plat->pg(0);
+
+	if (bitwork_mem.cpu_addr != 0) {
+		u32 *p = (u32 *) bitwork_mem.cpu_addr;
+		u32 data, pc;
+		u16 data_hi;
+		u16 data_lo;
+
+		clk_enable(vpu_clk);
+
+		/* reset VPU in case of voltage change */
+		if (vpu_plat->reset)
+			vpu_plat->reset();
+
+		pc = READ_REG(BIT_CUR_PC);
+		if (pc) {
+			clk_disable(vpu_clk);
+			goto recover_clk;
+		}
+
+		/* Restore registers */
+		for (i = 0; i < 64; i++)
+			WRITE_REG(regBk[i], BIT_CODE_BUF_ADDR + (i * 4));
+
+		WRITE_REG(0x0, BIT_RESET_CTRL);
+		WRITE_REG(0x0, BIT_CODE_RUN);
+		/* MX6 RTL has a bug not to init MBC_SET_SUBBLK_EN on reset */
+		WRITE_REG(0x0, MBC_SET_SUBBLK_EN);
+
+		/*
+		 * Re-load boot code, from the codebuffer in external RAM.
+		 * Thankfully, we only need 4096 bytes, same for all platforms.
+		 */
+		for (i = 0; i < 2048; i += 4) {
+			data = p[(i / 2) + 1];
+			data_hi = (data >> 16) & 0xFFFF;
+			data_lo = data & 0xFFFF;
+			WRITE_REG((i << 16) | data_hi, BIT_CODE_DOWN);
+			WRITE_REG(((i + 1) << 16) | data_lo,
+				  BIT_CODE_DOWN);
+
+			data = p[i / 2];
+			data_hi = (data >> 16) & 0xFFFF;
+			data_lo = data & 0xFFFF;
+			WRITE_REG(((i + 2) << 16) | data_hi,
+				  BIT_CODE_DOWN);
+			WRITE_REG(((i + 3) << 16) | data_lo,
+				  BIT_CODE_DOWN);
+		}
+
+		WRITE_REG(0x1, BIT_BUSY_FLAG);
+		WRITE_REG(0x1, BIT_CODE_RUN);
+		while (READ_REG(BIT_BUSY_FLAG))
+			;
+		clk_disable(vpu_clk);
+	}
+
+recover_clk:
+	/* Recover vpu clock */
+	for (i = 0; i < vpu_clk_usercount; i++)
+		clk_enable(vpu_clk);
+	if (!IS_ERR(vpu_regulator))
+		regulator_disable(vpu_regulator);
+
+	return 0;
+}
+#else
+#define	vpu_suspend	NULL
+#define	vpu_resume	NULL
+#endif				/* !CONFIG_PM */
+
+/*! Driver definition
+ *
+ */
+static struct platform_driver mxcvpu_driver = {
+	.driver = {
+		   .name = "mxc_vpu",
+		   },
+	.probe = vpu_dev_probe,
+	.remove = vpu_dev_remove,
+	.suspend = vpu_suspend,
+	.resume = vpu_resume,
+};
+
+static int __init vpu_init(void)
+{
+	int ret = platform_driver_register(&mxcvpu_driver);
+
+	init_waitqueue_head(&vpu_queue);
+
+
+	memblock_analyze();
+	top_address_DRAM = memblock_end_of_DRAM_with_reserved();
+
+	return ret;
+}
+
+static void __exit vpu_exit(void)
+{
+	if (vpu_major > 0) {
+		device_destroy(vpu_class, MKDEV(vpu_major, 0));
+		class_destroy(vpu_class);
+		unregister_chrdev(vpu_major, "mxc_vpu");
+		vpu_major = 0;
+	}
+
+	vpu_free_dma_buffer(&bitwork_mem);
+	vpu_free_dma_buffer(&pic_para_mem);
+	vpu_free_dma_buffer(&user_data_mem);
+
+	clk_put(vpu_clk);
+
+	platform_driver_unregister(&mxcvpu_driver);
+	return;
+}
+
+MODULE_AUTHOR("Freescale Semiconductor, Inc.");
+MODULE_DESCRIPTION("Linux VPU driver for Freescale i.MX/MXC");
+MODULE_LICENSE("GPL");
+
+module_init(vpu_init);
+module_exit(vpu_exit);