[media] MFC: Add MFC 5.1 V4L2 driver

Multi Format Codec 5.1 is a hardware video coding acceleration
module found in the S5PV210 and Exynos4 Samsung SoCs. It is
capable of handling a range of video codecs and this driver
provides a V4L2 interface for video decoding and encoding.

Signed-off-by: Kamil Debski <k.debski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Jeongtae Park <jtp.park@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 92 insertions, 0 deletions

diff --git a/drivers/media/video/s5p-mfc/s5p_mfc_intr.c b/drivers/media/video/s5p-mfc/s5p_mfc_intr.c
new file mode 100644
index 000000000000..8f2f8bf4da7f
--- /dev/null
+++ b/drivers/media/video/s5p-mfc/s5p_mfc_intr.c
@@ -0,0 +1,92 @@
+/*
+ * drivers/media/video/samsung/mfc5/s5p_mfc_intr.c
+ *
+ * C file for Samsung MFC (Multi Function Codec - FIMV) driver
+ * This file contains functions used to wait for command completion.
+ *
+ * Kamil Debski, Copyright (C) 2011 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com/
+ *
+ * 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/delay.h>
+#include <linux/errno.h>
+#include <linux/io.h>
+#include <linux/sched.h>
+#include <linux/wait.h>
+#include "regs-mfc.h"
+#include "s5p_mfc_common.h"
+#include "s5p_mfc_debug.h"
+#include "s5p_mfc_intr.h"
+
+int s5p_mfc_wait_for_done_dev(struct s5p_mfc_dev *dev, int command)
+{
+	int ret;
+
+	ret = wait_event_interruptible_timeout(dev->queue,
+		(dev->int_cond && (dev->int_type == command
+		|| dev->int_type == S5P_FIMV_R2H_CMD_ERR_RET)),
+		msecs_to_jiffies(MFC_INT_TIMEOUT));
+	if (ret == 0) {
+		mfc_err("Interrupt (dev->int_type:%d, command:%d) timed out\n",
+							dev->int_type, command);
+		return 1;
+	} else if (ret == -ERESTARTSYS) {
+		mfc_err("Interrupted by a signal\n");
+		return 1;
+	}
+	mfc_debug(1, "Finished waiting (dev->int_type:%d, command: %d)\n",
+							dev->int_type, command);
+	if (dev->int_type == S5P_FIMV_R2H_CMD_ERR_RET)
+		return 1;
+	return 0;
+}
+
+void s5p_mfc_clean_dev_int_flags(struct s5p_mfc_dev *dev)
+{
+	dev->int_cond = 0;
+	dev->int_type = 0;
+	dev->int_err = 0;
+}
+
+int s5p_mfc_wait_for_done_ctx(struct s5p_mfc_ctx *ctx,
+				    int command, int interrupt)
+{
+	int ret;
+
+	if (interrupt) {
+		ret = wait_event_interruptible_timeout(ctx->queue,
+				(ctx->int_cond && (ctx->int_type == command
+			|| ctx->int_type == S5P_FIMV_R2H_CMD_ERR_RET)),
+					msecs_to_jiffies(MFC_INT_TIMEOUT));
+	} else {
+		ret = wait_event_timeout(ctx->queue,
+				(ctx->int_cond && (ctx->int_type == command
+			|| ctx->int_type == S5P_FIMV_R2H_CMD_ERR_RET)),
+					msecs_to_jiffies(MFC_INT_TIMEOUT));
+	}
+	if (ret == 0) {
+		mfc_err("Interrupt (ctx->int_type:%d, command:%d) timed out\n",
+							ctx->int_type, command);
+		return 1;
+	} else if (ret == -ERESTARTSYS) {
+		mfc_err("Interrupted by a signal\n");
+		return 1;
+	}
+	mfc_debug(1, "Finished waiting (ctx->int_type:%d, command: %d)\n",
+							ctx->int_type, command);
+	if (ctx->int_type == S5P_FIMV_R2H_CMD_ERR_RET)
+		return 1;
+	return 0;
+}
+
+void s5p_mfc_clean_ctx_int_flags(struct s5p_mfc_ctx *ctx)
+{
+	ctx->int_cond = 0;
+	ctx->int_type = 0;
+	ctx->int_err = 0;
+}
+