diff options
Diffstat (limited to 'drivers/mxc/ipu3/ipu_device.c')
| -rw-r--r-- | drivers/mxc/ipu3/ipu_device.c | 510 |
1 files changed, 510 insertions, 0 deletions
diff --git a/drivers/mxc/ipu3/ipu_device.c b/drivers/mxc/ipu3/ipu_device.c new file mode 100644 index 000000000000..c7c032d85d52 --- /dev/null +++ b/drivers/mxc/ipu3/ipu_device.c @@ -0,0 +1,510 @@ +/* + * Copyright 2005-2010 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 ipu_device.c + * + * @brief This file contains the IPUv3 driver device interface and fops functions. + * + * @ingroup IPU + */ + +#include <linux/types.h> +#include <linux/init.h> +#include <linux/platform_device.h> +#include <linux/err.h> +#include <linux/spinlock.h> +#include <linux/delay.h> +#include <linux/clk.h> +#include <linux/poll.h> +#include <linux/sched.h> +#include <linux/time.h> +#include <linux/wait.h> +#include <linux/dma-mapping.h> +#include <linux/io.h> +#include <linux/ipu.h> +#include <asm/cacheflush.h> + +#include "ipu_prv.h" +#include "ipu_regs.h" +#include "ipu_param_mem.h" + +/* Strucutures and variables for exporting MXC IPU as device*/ + +static int mxc_ipu_major; +static struct class *mxc_ipu_class; + +DEFINE_SPINLOCK(event_lock); + +struct ipu_dev_irq_info { + wait_queue_head_t waitq; + int irq_pending; +} irq_info[480]; + +int register_ipu_device(void); + +/* Static functions */ + +int get_events(ipu_event_info *p) +{ + unsigned long flags; + int ret = 0; + + spin_lock_irqsave(&event_lock, flags); + if (irq_info[p->irq].irq_pending > 0) + irq_info[p->irq].irq_pending--; + else + ret = -1; + spin_unlock_irqrestore(&event_lock, flags); + + return ret; +} + +static irqreturn_t mxc_ipu_generic_handler(int irq, void *dev_id) +{ + irq_info[irq].irq_pending++; + + /* Wakeup any blocking user context */ + wake_up_interruptible(&(irq_info[irq].waitq)); + return IRQ_HANDLED; +} + +static int mxc_ipu_open(struct inode *inode, struct file *file) +{ + int ret = 0; + return ret; +} +static int mxc_ipu_ioctl(struct inode *inode, struct file *file, + unsigned int cmd, unsigned long arg) +{ + int ret = 0; + + switch (cmd) { + case IPU_INIT_CHANNEL: + { + ipu_channel_parm parm; + + if (copy_from_user + (&parm, (ipu_channel_parm *) arg, + sizeof(ipu_channel_parm))) + return -EFAULT; + + if (!parm.flag) { + ret = + ipu_init_channel(parm.channel, + &parm.params); + } else { + ret = ipu_init_channel(parm.channel, NULL); + } + } + break; + case IPU_UNINIT_CHANNEL: + { + ipu_channel_t ch; + int __user *argp = (void __user *)arg; + if (get_user(ch, argp)) + return -EFAULT; + ipu_uninit_channel(ch); + } + break; + case IPU_INIT_CHANNEL_BUFFER: + { + ipu_channel_buf_parm parm; + if (copy_from_user + (&parm, (ipu_channel_buf_parm *) arg, + sizeof(ipu_channel_buf_parm))) + return -EFAULT; + + ret = + ipu_init_channel_buffer( + parm.channel, parm.type, + parm.pixel_fmt, + parm.width, parm.height, + parm.stride, + parm.rot_mode, + parm.phyaddr_0, + parm.phyaddr_1, + parm.u_offset, + parm.v_offset); + + } + break; + case IPU_UPDATE_CHANNEL_BUFFER: + { + ipu_channel_buf_parm parm; + if (copy_from_user + (&parm, (ipu_channel_buf_parm *) arg, + sizeof(ipu_channel_buf_parm))) + return -EFAULT; + + if ((parm.phyaddr_0 != (dma_addr_t) NULL) + && (parm.phyaddr_1 == (dma_addr_t) NULL)) { + ret = + ipu_update_channel_buffer( + parm.channel, + parm.type, + parm.bufNum, + parm.phyaddr_0); + } else if ((parm.phyaddr_0 == (dma_addr_t) NULL) + && (parm.phyaddr_1 != (dma_addr_t) NULL)) { + ret = + ipu_update_channel_buffer( + parm.channel, + parm.type, + parm.bufNum, + parm.phyaddr_1); + } else { + ret = -1; + } + + } + break; + case IPU_SELECT_CHANNEL_BUFFER: + { + ipu_channel_buf_parm parm; + if (copy_from_user + (&parm, (ipu_channel_buf_parm *) arg, + sizeof(ipu_channel_buf_parm))) + return -EFAULT; + + ret = + ipu_select_buffer(parm.channel, + parm.type, parm.bufNum); + + } + break; + case IPU_SELECT_MULTI_VDI_BUFFER: + { + uint32_t parm; + if (copy_from_user + (&parm, (uint32_t *) arg, + sizeof(uint32_t))) + return -EFAULT; + + ret = ipu_select_multi_vdi_buffer(parm); + } + break; + case IPU_LINK_CHANNELS: + { + ipu_channel_link link; + if (copy_from_user + (&link, (ipu_channel_link *) arg, + sizeof(ipu_channel_link))) + return -EFAULT; + + ret = ipu_link_channels(link.src_ch, + link.dest_ch); + + } + break; + case IPU_UNLINK_CHANNELS: + { + ipu_channel_link link; + if (copy_from_user + (&link, (ipu_channel_link *) arg, + sizeof(ipu_channel_link))) + return -EFAULT; + + ret = ipu_unlink_channels(link.src_ch, + link.dest_ch); + + } + break; + case IPU_ENABLE_CHANNEL: + { + ipu_channel_t ch; + int __user *argp = (void __user *)arg; + if (get_user(ch, argp)) + return -EFAULT; + ipu_enable_channel(ch); + } + break; + case IPU_DISABLE_CHANNEL: + { + ipu_channel_info info; + if (copy_from_user + (&info, (ipu_channel_info *) arg, + sizeof(ipu_channel_info))) + return -EFAULT; + + ret = ipu_disable_channel(info.channel, + info.stop); + } + break; + case IPU_ENABLE_IRQ: + { + uint32_t irq; + int __user *argp = (void __user *)arg; + if (get_user(irq, argp)) + return -EFAULT; + ipu_enable_irq(irq); + } + break; + case IPU_DISABLE_IRQ: + { + uint32_t irq; + int __user *argp = (void __user *)arg; + if (get_user(irq, argp)) + return -EFAULT; + ipu_disable_irq(irq); + } + break; + case IPU_CLEAR_IRQ: + { + uint32_t irq; + int __user *argp = (void __user *)arg; + if (get_user(irq, argp)) + return -EFAULT; + ipu_clear_irq(irq); + } + break; + case IPU_FREE_IRQ: + { + ipu_irq_info info; + + if (copy_from_user + (&info, (ipu_irq_info *) arg, + sizeof(ipu_irq_info))) + return -EFAULT; + + ipu_free_irq(info.irq, info.dev_id); + irq_info[info.irq].irq_pending = 0; + } + break; + case IPU_REQUEST_IRQ_STATUS: + { + uint32_t irq; + int __user *argp = (void __user *)arg; + if (get_user(irq, argp)) + return -EFAULT; + ret = ipu_get_irq_status(irq); + } + break; + case IPU_REGISTER_GENERIC_ISR: + { + ipu_event_info info; + if (copy_from_user + (&info, (ipu_event_info *) arg, + sizeof(ipu_event_info))) + return -EFAULT; + + ret = + ipu_request_irq(info.irq, + mxc_ipu_generic_handler, + 0, "video_sink", info.dev); + if (ret == 0) + init_waitqueue_head(&(irq_info[info.irq].waitq)); + } + break; + case IPU_GET_EVENT: + /* User will have to allocate event_type + structure and pass the pointer in arg */ + { + ipu_event_info info; + int r = -1; + + if (copy_from_user + (&info, (ipu_event_info *) arg, + sizeof(ipu_event_info))) + return -EFAULT; + + r = get_events(&info); + if (r == -1) { + if ((file->f_flags & O_NONBLOCK) && + (irq_info[info.irq].irq_pending == 0)) + return -EAGAIN; + wait_event_interruptible_timeout(irq_info[info.irq].waitq, + (irq_info[info.irq].irq_pending != 0), 2 * HZ); + r = get_events(&info); + } + ret = -1; + if (r == 0) { + if (!copy_to_user((ipu_event_info *) arg, + &info, sizeof(ipu_event_info))) + ret = 0; + } + } + break; + case IPU_ALOC_MEM: + { + ipu_mem_info info; + if (copy_from_user + (&info, (ipu_mem_info *) arg, + sizeof(ipu_mem_info))) + return -EFAULT; + + info.vaddr = dma_alloc_coherent(0, + PAGE_ALIGN(info.size), + &info.paddr, + GFP_DMA | GFP_KERNEL); + if (info.vaddr == 0) { + printk(KERN_ERR "dma alloc failed!\n"); + return -ENOBUFS; + } + if (copy_to_user((ipu_mem_info *) arg, &info, + sizeof(ipu_mem_info)) > 0) + return -EFAULT; + } + break; + case IPU_FREE_MEM: + { + ipu_mem_info info; + if (copy_from_user + (&info, (ipu_mem_info *) arg, + sizeof(ipu_mem_info))) + return -EFAULT; + + if (info.vaddr) + dma_free_coherent(0, PAGE_ALIGN(info.size), + info.vaddr, info.paddr); + else + return -EFAULT; + } + break; + case IPU_IS_CHAN_BUSY: + { + ipu_channel_t chan; + if (copy_from_user + (&chan, (ipu_channel_t *)arg, + sizeof(ipu_channel_t))) + return -EFAULT; + + if (ipu_is_channel_busy(chan)) + ret = 1; + else + ret = 0; + } + break; + case IPU_CALC_STRIPES_SIZE: + { + ipu_stripe_parm stripe_parm; + + if (copy_from_user (&stripe_parm, (ipu_stripe_parm *)arg, + sizeof(ipu_stripe_parm))) + return -EFAULT; + ipu_calc_stripes_sizes(stripe_parm.input_width, + stripe_parm.output_width, + stripe_parm.maximal_stripe_width, + stripe_parm.cirr, + stripe_parm.equal_stripes, + stripe_parm.input_pixelformat, + stripe_parm.output_pixelformat, + &stripe_parm.left, + &stripe_parm.right); + if (copy_to_user((ipu_stripe_parm *) arg, &stripe_parm, + sizeof(ipu_stripe_parm)) > 0) + return -EFAULT; + } + break; + case IPU_UPDATE_BUF_OFFSET: + { + ipu_buf_offset_parm offset_parm; + + if (copy_from_user (&offset_parm, (ipu_buf_offset_parm *)arg, + sizeof(ipu_buf_offset_parm))) + return -EFAULT; + ret = ipu_update_channel_offset(offset_parm.channel, + offset_parm.type, + offset_parm.pixel_fmt, + offset_parm.width, + offset_parm.height, + offset_parm.stride, + offset_parm.u_offset, + offset_parm.v_offset, + offset_parm.vertical_offset, + offset_parm.horizontal_offset); + } + break; + case IPU_CSC_UPDATE: + { + int param[5][3]; + ipu_csc_update csc; + if (copy_from_user(&csc, (void *) arg, + sizeof(ipu_csc_update))) + return -EFAULT; + if (copy_from_user(¶m[0][0], (void *) csc.param, + sizeof(param))) + return -EFAULT; + ipu_set_csc_coefficients(csc.channel, param); + } + break; + default: + break; + } + return ret; +} + +static int mxc_ipu_mmap(struct file *file, struct vm_area_struct *vma) +{ + vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot); + + if (remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff, + vma->vm_end - vma->vm_start, + vma->vm_page_prot)) { + printk(KERN_ERR + "mmap failed!\n"); + return -ENOBUFS; + } + return 0; +} + +static int mxc_ipu_release(struct inode *inode, struct file *file) +{ + return 0; +} + +static struct file_operations mxc_ipu_fops = { + .owner = THIS_MODULE, + .open = mxc_ipu_open, + .mmap = mxc_ipu_mmap, + .release = mxc_ipu_release, + .ioctl = mxc_ipu_ioctl, +}; + +int register_ipu_device() +{ + int ret = 0; + struct device *temp; + mxc_ipu_major = register_chrdev(0, "mxc_ipu", &mxc_ipu_fops); + if (mxc_ipu_major < 0) { + printk(KERN_ERR + "Unable to register Mxc Ipu as a char device\n"); + return mxc_ipu_major; + } + + mxc_ipu_class = class_create(THIS_MODULE, "mxc_ipu"); + if (IS_ERR(mxc_ipu_class)) { + printk(KERN_ERR "Unable to create class for Mxc Ipu\n"); + ret = PTR_ERR(mxc_ipu_class); + goto err1; + } + + temp = device_create(mxc_ipu_class, NULL, MKDEV(mxc_ipu_major, 0), + NULL, "mxc_ipu"); + + if (IS_ERR(temp)) { + printk(KERN_ERR "Unable to create class device for Mxc Ipu\n"); + ret = PTR_ERR(temp); + goto err2; + } + spin_lock_init(&event_lock); + + return ret; + +err2: + class_destroy(mxc_ipu_class); +err1: + unregister_chrdev(mxc_ipu_major, "mxc_ipu"); + return ret; + +} |