linux/drivers/media/platform/s5p-mfc/s5p_mfc_intr.c
Arun Kumar K 43a1ea1f90 [media] s5p-mfc: Update MFCv5 driver for callback based architecture
Modifies the driver to use a callback based architecture
for hardware dependent calls. This architecture is suitable
for supporting co-existence with newer versions of MFC hardware.

Signed-off-by: Arun Kumar K <arun.kk@samsung.com>
Signed-off-by: Naveen Krishna Chatradhi <ch.naveen@samsung.com>
Acked-by: Kamil Debski <k.debski@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-10-05 22:53:37 -03:00

92 lines
2.4 KiB
C

/*
* drivers/media/platform/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 "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_MFC_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_MFC_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_MFC_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_MFC_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_MFC_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;
}