1 files changed, 515 insertions, 0 deletions
diff --git a/drivers/media/video/samsung/fimg2d4x-exynos4/fimg2d_drv.c b/drivers/media/video/samsung/fimg2d4x-exynos4/fimg2d_drv.c
new file mode 100644
index 0000000..6ae4d6e
--- /dev/null
+++ b/drivers/media/video/samsung/fimg2d4x-exynos4/fimg2d_drv.c
@@ -0,0 +1,515 @@
+/* linux/drivers/media/video/samsung/fimg2d4x/fimg2d_drv.c
+ *
+ * Copyright (c) 2011 Samsung Electronics Co., Ltd.
+ *	http://www.samsung.com/
+ *
+ * Samsung Graphics 2D driver
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/poll.h>
+#include <linux/platform_device.h>
+#include <linux/miscdevice.h>
+#include <linux/irq.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/slab.h>
+#include <linux/workqueue.h>
+#include <linux/dma-mapping.h>
+#include <linux/sched.h>
+#include <linux/wait.h>
+#include <linux/atomic.h>
+#include <linux/delay.h>
+#include <asm/cacheflush.h>
+#include <plat/cpu.h>
+#include <plat/fimg2d.h>
+#include <plat/s5p-sysmmu.h>
+#include <mach/dev.h>
+#ifdef CONFIG_PM_RUNTIME
+#include <linux/pm_runtime.h>
+#endif
+#include "fimg2d.h"
+#include "fimg2d_clk.h"
+#include "fimg2d_ctx.h"
+#include "fimg2d_helper.h"
+
+#define CTX_TIMEOUT	msecs_to_jiffies(1000)
+
+static struct fimg2d_control *info;
+
+static void fimg2d_worker(struct work_struct *work)
+{
+	fimg2d_debug("start kernel thread\n");
+	info->blit(info);
+}
+
+static DECLARE_WORK(fimg2d_work, fimg2d_worker);
+
+/**
+ * @irq: irq number
+ * @dev_id: pointer to private data
+ */
+static irqreturn_t fimg2d_irq(int irq, void *dev_id)
+{
+	fimg2d_debug("irq\n");
+	info->stop(info);
+
+	return IRQ_HANDLED;
+}
+
+static int fimg2d_sysmmu_fault_handler(enum S5P_SYSMMU_INTERRUPT_TYPE itype,
+		unsigned long pgtable_base, unsigned long fault_addr)
+{
+	struct fimg2d_bltcmd *cmd;
+
+	if (itype == SYSMMU_PAGEFAULT) {
+		printk(KERN_ERR "[%s] sysmmu page fault(0x%lx), pgd(0x%lx)\n",
+				__func__, fault_addr, pgtable_base);
+	} else {
+		printk(KERN_ERR "[%s] sysmmu interrupt "
+				"type(%d) pgd(0x%lx) addr(0x%lx)\n",
+				__func__, itype, pgtable_base, fault_addr);
+	}
+
+	cmd = fimg2d_get_first_command(info);
+	if (!cmd) {
+		printk(KERN_ERR "[%s] null command\n", __func__);
+		goto next;
+	}
+
+	if (cmd->ctx->mm->pgd != phys_to_virt(pgtable_base)) {
+		printk(KERN_ERR "[%s] pgtable base is different from current command\n",
+				__func__);
+		goto next;
+	}
+
+	fimg2d_dump_command(cmd);
+
+next:
+	fimg2d_clk_dump(info);
+	info->dump(info);
+
+	BUG();
+	return 0;
+}
+
+static void fimg2d_context_wait(struct fimg2d_context *ctx)
+{
+	while (atomic_read(&ctx->ncmd)) {
+		if (!wait_event_timeout(ctx->wait_q, !atomic_read(&ctx->ncmd), CTX_TIMEOUT)) {
+			atomic_set(&info->active, 1);
+			queue_work(info->work_q, &fimg2d_work);
+			printk(KERN_ERR "[%s] ctx %p cmd wait timeout\n", __func__, ctx);
+			if (info->err)
+				break;
+		}
+	}
+}
+
+static void fimg2d_request_bitblt(struct fimg2d_context *ctx)
+{
+	spin_lock(&info->bltlock);
+	if (!atomic_read(&info->active)) {
+		atomic_set(&info->active, 1);
+		fimg2d_debug("dispatch ctx %p to kernel thread\n", ctx);
+		queue_work(info->work_q, &fimg2d_work);
+	}
+	spin_unlock(&info->bltlock);
+	fimg2d_context_wait(ctx);
+}
+
+static int fimg2d_open(struct inode *inode, struct file *file)
+{
+	struct fimg2d_context *ctx;
+
+	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
+	if (!ctx) {
+		printk(KERN_ERR "[%s] not enough memory for ctx\n", __func__);
+		return -ENOMEM;
+	}
+	file->private_data = (void *)ctx;
+
+	ctx->mm = current->mm;
+	fimg2d_debug("ctx %p current pgd %p init_mm pgd %p\n",
+			ctx, (unsigned long *)ctx->mm->pgd,
+			(unsigned long *)init_mm.pgd);
+
+	fimg2d_add_context(info, ctx);
+	return 0;
+}
+
+static int fimg2d_release(struct inode *inode, struct file *file)
+{
+	struct fimg2d_context *ctx = file->private_data;
+
+	fimg2d_debug("ctx %p\n", ctx);
+	while (1) {
+		if (!atomic_read(&ctx->ncmd))
+			break;
+
+		mdelay(2);
+	}
+	fimg2d_del_context(info, ctx);
+
+	kfree(ctx);
+	return 0;
+}
+
+static int fimg2d_mmap(struct file *file, struct vm_area_struct *vma)
+{
+	return 0;
+}
+
+static unsigned int fimg2d_poll(struct file *file, struct poll_table_struct *wait)
+{
+	return 0;
+}
+
+static long fimg2d_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+	int ret = 0;
+	struct fimg2d_context *ctx;
+	struct fimg2d_platdata *pdata;
+	struct fimg2d_blit blit;
+	struct fimg2d_version ver;
+	struct fimg2d_image dst;
+
+	ctx = file->private_data;
+	if (!ctx) {
+		printk(KERN_ERR "[%s] missing ctx\n", __func__);
+		return -EFAULT;
+	}
+
+	switch (cmd) {
+	case FIMG2D_BITBLT_BLIT:
+		if (info->err) {
+			printk(KERN_ERR "[%s] device error, do sw fallback\n",
+					__func__);
+			return -EFAULT;
+		}
+
+		if (copy_from_user(&blit, (void *)arg, sizeof(blit)))
+			return -EFAULT;
+		if (blit.dst)
+			if (copy_from_user(&dst, (void *)blit.dst, sizeof(dst)))
+				return -EFAULT;
+
+#ifdef CONFIG_BUSFREQ_OPP
+#if defined(CONFIG_CPU_EXYNOS4212) || defined(CONFIG_CPU_EXYNOS4412)
+			dev_lock(info->bus_dev, info->dev, 160160);
+#endif
+#endif
+		if ((blit.dst) && (dst.addr.type == ADDR_USER))
+			if (!down_write_trylock(&page_alloc_slow_rwsem))
+				ret = -EAGAIN;
+
+		if (ret != -EAGAIN)
+			ret = fimg2d_add_command(info, ctx, &blit, dst.addr.type);
+
+		if (!ret) {
+			fimg2d_request_bitblt(ctx);
+		}
+
+#ifdef PERF_PROFILE
+		perf_print(ctx, blit.seq_no);
+		perf_clear(ctx);
+#endif
+		if ((blit.dst) && (dst.addr.type == ADDR_USER) && ret != -EAGAIN)
+			up_write(&page_alloc_slow_rwsem);
+
+#ifdef CONFIG_BUSFREQ_OPP
+#if defined(CONFIG_CPU_EXYNOS4212) || defined(CONFIG_CPU_EXYNOS4412)
+			dev_unlock(info->bus_dev, info->dev);
+#endif
+#endif
+		break;
+
+	case FIMG2D_BITBLT_SYNC:
+		fimg2d_debug("FIMG2D_BITBLT_SYNC ctx: %p\n", ctx);
+		/* FIXME: */
+		break;
+
+	case FIMG2D_BITBLT_VERSION:
+		pdata = to_fimg2d_plat(info->dev);
+		ver.hw = pdata->hw_ver;
+		ver.sw = 0;
+		fimg2d_debug("fimg2d version, hw: 0x%x sw: 0x%x\n",
+				ver.hw, ver.sw);
+		if (copy_to_user((void *)arg, &ver, sizeof(ver)))
+			return -EFAULT;
+		break;
+
+	default:
+		printk(KERN_ERR "[%s] unknown ioctl\n", __func__);
+		ret = -EFAULT;
+		break;
+	}
+
+	return ret;
+}
+
+/* fops */
+static const struct file_operations fimg2d_fops = {
+	.owner          = THIS_MODULE,
+	.open           = fimg2d_open,
+	.release        = fimg2d_release,
+	.mmap           = fimg2d_mmap,
+	.poll           = fimg2d_poll,
+	.unlocked_ioctl = fimg2d_ioctl,
+};
+
+/* miscdev */
+static struct miscdevice fimg2d_dev = {
+	.minor		= FIMG2D_MINOR,
+	.name		= "fimg2d",
+	.fops		= &fimg2d_fops,
+};
+
+static int fimg2d_setup_controller(struct fimg2d_control *info)
+{
+	atomic_set(&info->suspended, 0);
+	atomic_set(&info->clkon, 0);
+	atomic_set(&info->busy, 0);
+	atomic_set(&info->nctx, 0);
+	atomic_set(&info->active, 0);
+
+	spin_lock_init(&info->bltlock);
+
+	INIT_LIST_HEAD(&info->cmd_q);
+	init_waitqueue_head(&info->wait_q);
+	fimg2d_register_ops(info);
+
+	info->work_q = create_singlethread_workqueue("kfimg2dd");
+	if (!info->work_q)
+		return -ENOMEM;
+
+	return 0;
+}
+
+static int fimg2d_probe(struct platform_device *pdev)
+{
+	struct resource *res;
+	struct fimg2d_platdata *pdata;
+	int ret;
+
+	pdata = to_fimg2d_plat(&pdev->dev);
+	if (!pdata) {
+		printk(KERN_ERR "FIMG2D failed to get platform data\n");
+		ret = -ENOMEM;
+		goto err_plat;
+	}
+
+	/* global structure */
+	info = kzalloc(sizeof(*info), GFP_KERNEL);
+	if (!info) {
+		printk(KERN_ERR "FIMG2D failed to allocate memory for controller\n");
+		ret = -ENOMEM;
+		goto err_plat;
+	}
+
+	/* setup global info */
+	ret = fimg2d_setup_controller(info);
+	if (ret) {
+		printk(KERN_ERR "FIMG2D failed to setup controller\n");
+		goto err_setup;
+	}
+	info->dev = &pdev->dev;
+
+	/* memory region */
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res) {
+		printk(KERN_ERR "FIMG2D failed to get resource\n");
+		ret = -ENOENT;
+		goto err_res;
+	}
+
+	info->mem = request_mem_region(res->start, resource_size(res),
+					pdev->name);
+	if (!info->mem) {
+		printk(KERN_ERR "FIMG2D failed to request memory region\n");
+		ret = -ENOMEM;
+		goto err_region;
+	}
+
+	/* ioremap */
+	info->regs = ioremap(res->start, resource_size(res));
+	if (!info->regs) {
+		printk(KERN_ERR "FIMG2D failed to ioremap for SFR\n");
+		ret = -ENOENT;
+		goto err_map;
+	}
+	fimg2d_debug("device name: %s base address: 0x%lx\n",
+			pdev->name, (unsigned long)res->start);
+
+	/* irq */
+	info->irq = platform_get_irq(pdev, 0);
+	if (!info->irq) {
+		printk(KERN_ERR "FIMG2D failed to get irq resource\n");
+		ret = -ENOENT;
+		goto err_map;
+	}
+	fimg2d_debug("irq: %d\n", info->irq);
+
+	ret = request_irq(info->irq, fimg2d_irq, IRQF_DISABLED, pdev->name, info);
+	if (ret) {
+		printk(KERN_ERR "FIMG2D failed to request irq\n");
+		ret = -ENOENT;
+		goto err_irq;
+	}
+
+	ret = fimg2d_clk_setup(info);
+	if (ret) {
+		printk(KERN_ERR "FIMG2D failed to setup clk\n");
+		ret = -ENOENT;
+		goto err_clk;
+	}
+
+#ifdef CONFIG_PM_RUNTIME
+	pm_runtime_enable(info->dev);
+	fimg2d_debug("enable runtime pm\n");
+#endif
+
+#ifdef CONFIG_BUSFREQ_OPP
+#if defined(CONFIG_CPU_EXYNOS4212) || defined(CONFIG_CPU_EXYNOS4412)
+	/* To lock bus frequency in OPP mode */
+	info->bus_dev = dev_get("exynos-busfreq");
+#endif
+#endif
+	s5p_sysmmu_set_fault_handler(info->dev, fimg2d_sysmmu_fault_handler);
+	fimg2d_debug("register sysmmu page fault handler\n");
+
+	/* misc register */
+	ret = misc_register(&fimg2d_dev);
+	if (ret) {
+		printk(KERN_ERR "FIMG2D failed to register misc driver\n");
+		goto err_reg;
+	}
+
+	printk(KERN_INFO "Samsung Graphics 2D driver, (c) 2011 Samsung Electronics\n");
+	return 0;
+
+err_reg:
+	fimg2d_clk_release(info);
+
+err_clk:
+	free_irq(info->irq, NULL);
+
+err_irq:
+	iounmap(info->regs);
+
+err_map:
+	kfree(info->mem);
+
+err_region:
+	release_resource(info->mem);
+
+err_res:
+	destroy_workqueue(info->work_q);
+
+err_setup:
+	kfree(info);
+
+err_plat:
+	return ret;
+}
+
+static int fimg2d_remove(struct platform_device *pdev)
+{
+	free_irq(info->irq, NULL);
+
+	if (info->mem) {
+		iounmap(info->regs);
+		release_resource(info->mem);
+		kfree(info->mem);
+	}
+
+	destroy_workqueue(info->work_q);
+	misc_deregister(&fimg2d_dev);
+	kfree(info);
+
+#ifdef CONFIG_PM_RUNTIME
+	pm_runtime_disable(&pdev->dev);
+	fimg2d_debug("disable runtime pm\n");
+#endif
+
+	return 0;
+}
+
+static int fimg2d_suspend(struct device *dev)
+{
+	fimg2d_debug("suspend... start\n");
+	atomic_set(&info->suspended, 1);
+	while (1) {
+		if (fimg2d_queue_is_empty(&info->cmd_q))
+			break;
+
+		mdelay(2);
+	}
+	fimg2d_debug("suspend... done\n");
+	return 0;
+}
+
+static int fimg2d_resume(struct device *dev)
+{
+	fimg2d_debug("resume... start\n");
+	atomic_set(&info->suspended, 0);
+	fimg2d_debug("resume... done\n");
+	return 0;
+}
+
+#ifdef CONFIG_PM_RUNTIME
+static int fimg2d_runtime_suspend(struct device *dev)
+{
+	fimg2d_debug("runtime suspend... done\n");
+	return 0;
+}
+
+static int fimg2d_runtime_resume(struct device *dev)
+{
+	fimg2d_debug("runtime resume... done\n");
+	return 0;
+}
+#endif
+
+static const struct dev_pm_ops fimg2d_pm_ops = {
+	.suspend		= fimg2d_suspend,
+	.resume			= fimg2d_resume,
+#ifdef CONFIG_PM_RUNTIME
+	.runtime_suspend	= fimg2d_runtime_suspend,
+	.runtime_resume		= fimg2d_runtime_resume,
+#endif
+};
+
+static struct platform_driver fimg2d_driver = {
+	.probe		= fimg2d_probe,
+	.remove		= fimg2d_remove,
+	.driver		= {
+		.owner	= THIS_MODULE,
+		.name	= "s5p-fimg2d",
+		.pm     = &fimg2d_pm_ops,
+	},
+};
+
+static int __init fimg2d_register(void)
+{
+	return platform_driver_register(&fimg2d_driver);
+}
+
+static void __exit fimg2d_unregister(void)
+{
+	platform_driver_unregister(&fimg2d_driver);
+}
+
+module_init(fimg2d_register);
+module_exit(fimg2d_unregister);
+
+MODULE_AUTHOR("Eunseok Choi <es10.choi@samsung.com>");
+MODULE_AUTHOR("Jinsung Yang <jsgood.yang@samsung.com>");
+MODULE_DESCRIPTION("Samsung Graphics 2D driver");
+MODULE_LICENSE("GPL");