drivers/media/platform/s5p-mfc/s5p_mfc_ctrl.c - nest-cam/v366/kernel_backports - Git at Google

 /*
  * linux/drivers/media/platform/s5p-mfc/s5p_mfc_ctrl.c
  *
  * Copyright (c) 2010 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 as published by
  * the Free Software Foundation; either version 2 of the License, or
  * (at your option) any later version.
  */

 #include <linux/delay.h>
 #include <linux/err.h>
 #include <linux/firmware.h>
 #include <linux/jiffies.h>
 #include <linux/sched.h>
 #include "s5p_mfc_cmd.h"
 #include "s5p_mfc_common.h"
 #include "s5p_mfc_debug.h"
 #include "s5p_mfc_intr.h"
 #include "s5p_mfc_opr.h"
 #include "s5p_mfc_pm.h"

 /* Allocate memory for firmware */
 int s5p_mfc_alloc_firmware(struct s5p_mfc_dev *dev)
 {
 	void *bank2_virt;
 	dma_addr_t bank2_dma_addr;

 	dev->fw_size = dev->variant->buf_size->fw;

 	if (dev->fw_virt_addr) {
 		mfc_err("Attempting to allocate firmware when it seems that it is already loaded\n");
 		return -ENOMEM;
 	}

 	dev->fw_virt_addr = dma_alloc_coherent(dev->mem_dev_l, dev->fw_size,
 					&dev->bank1, GFP_KERNEL);

 	if (IS_ERR_OR_NULL(dev->fw_virt_addr)) {
 		dev->fw_virt_addr = NULL;
 		mfc_err("Allocating bitprocessor buffer failed\n");
 		return -ENOMEM;
 	}

 	dev->bank1 = dev->bank1;

 	if (HAS_PORTNUM(dev) && IS_TWOPORT(dev)) {
 		bank2_virt = dma_alloc_coherent(dev->mem_dev_r, 1 << MFC_BASE_ALIGN_ORDER,
 					&bank2_dma_addr, GFP_KERNEL);

 		if (IS_ERR(dev->fw_virt_addr)) {
 			mfc_err("Allocating bank2 base failed\n");
 			dma_free_coherent(dev->mem_dev_l, dev->fw_size,
 				dev->fw_virt_addr, dev->bank1);
 			dev->fw_virt_addr = NULL;
 			return -ENOMEM;
 		}

 		/* Valid buffers passed to MFC encoder with LAST_FRAME command
 		 * should not have address of bank2 - MFC will treat it as a null frame.
 		 * To avoid such situation we set bank2 address below the pool address.
 		 */
 		dev->bank2 = bank2_dma_addr - (1 << MFC_BASE_ALIGN_ORDER);

 		dma_free_coherent(dev->mem_dev_r, 1 << MFC_BASE_ALIGN_ORDER,
 			bank2_virt, bank2_dma_addr);

 	} else {
 		/* In this case bank2 can point to the same address as bank1.
 		 * Firmware will always occupy the beginning of this area so it is
 		 * impossible having a video frame buffer with zero address. */
 		dev->bank2 = dev->bank1;
 	}
 	return 0;
 }

 /* Load firmware */
 int s5p_mfc_load_firmware(struct s5p_mfc_dev *dev)
 {
 	struct firmware *fw_blob;
 	int err;

 	/* Firmare has to be present as a separate file or compiled
 	 * into kernel. */
 	mfc_debug_enter();

 	err = request_firmware((const struct firmware **)&fw_blob,
 				     dev->variant->fw_name, dev->v4l2_dev.dev);
 	if (err != 0) {
 		mfc_err("Firmware is not present in the /lib/firmware directory nor compiled in kernel\n");
 		return -EINVAL;
 	}
 	if (fw_blob->size > dev->fw_size) {
 		mfc_err("MFC firmware is too big to be loaded\n");
 		release_firmware(fw_blob);
 		return -ENOMEM;
 	}
 	if (!dev->fw_virt_addr) {
 		mfc_err("MFC firmware is not allocated\n");
 		release_firmware(fw_blob);
 		return -EINVAL;
 	}
 	memcpy(dev->fw_virt_addr, fw_blob->data, fw_blob->size);
 	wmb();
 	release_firmware(fw_blob);
 	mfc_debug_leave();
 	return 0;
 }

 /* Reload firmware to MFC */
 int s5p_mfc_reload_firmware(struct s5p_mfc_dev *dev)
 {
 	struct firmware *fw_blob;
 	int err;

 	/* Firmare has to be present as a separate file or compiled
 	 * into kernel. */
 	mfc_debug_enter();

 	err = request_firmware((const struct firmware **)&fw_blob,
 				     dev->variant->fw_name, dev->v4l2_dev.dev);
 	if (err != 0) {
 		mfc_err("Firmware is not present in the /lib/firmware directory nor compiled in kernel\n");
 		return -EINVAL;
 	}
 	if (fw_blob->size > dev->fw_size) {
 		mfc_err("MFC firmware is too big to be loaded\n");
 		release_firmware(fw_blob);
 		return -ENOMEM;
 	}
 	if (!dev->fw_virt_addr) {
 		mfc_err("MFC firmware is not allocated\n");
 		release_firmware(fw_blob);
 		return -EINVAL;
 	}
 	memcpy(dev->fw_virt_addr, fw_blob->data, fw_blob->size);
 	wmb();
 	release_firmware(fw_blob);
 	mfc_debug_leave();
 	return 0;
 }

 /* Release firmware memory */
 int s5p_mfc_release_firmware(struct s5p_mfc_dev *dev)
 {
 	/* Before calling this function one has to make sure
 	 * that MFC is no longer processing */
 	if (!dev->fw_virt_addr)
 		return -EINVAL;
 	dma_free_coherent(dev->mem_dev_l, dev->fw_size, dev->fw_virt_addr,
 						dev->bank1);
 	dev->fw_virt_addr = NULL;
 	return 0;
 }

 /* Reset the device */
 int s5p_mfc_reset(struct s5p_mfc_dev *dev)
 {
 	unsigned int mc_status;
 	unsigned long timeout;
 	int i;

 	mfc_debug_enter();

 	if (IS_MFCV6_PLUS(dev)) {
 		/* Reset IP */
 		/*  except RISC, reset */
 		mfc_write(dev, 0xFEE, S5P_FIMV_MFC_RESET_V6);
 		/*  reset release */
 		mfc_write(dev, 0x0, S5P_FIMV_MFC_RESET_V6);

 		/* Zero Initialization of MFC registers */
 		mfc_write(dev, 0, S5P_FIMV_RISC2HOST_CMD_V6);
 		mfc_write(dev, 0, S5P_FIMV_HOST2RISC_CMD_V6);
 		mfc_write(dev, 0, S5P_FIMV_FW_VERSION_V6);

 		for (i = 0; i < S5P_FIMV_REG_CLEAR_COUNT_V6; i++)
 			mfc_write(dev, 0, S5P_FIMV_REG_CLEAR_BEGIN_V6 + (i*4));

 		/* Reset */
 		mfc_write(dev, 0, S5P_FIMV_RISC_ON_V6);
 		mfc_write(dev, 0x1FFF, S5P_FIMV_MFC_RESET_V6);
 		mfc_write(dev, 0, S5P_FIMV_MFC_RESET_V6);
 	} else {
 		/* Stop procedure */
 		/*  reset RISC */
 		mfc_write(dev, 0x3f6, S5P_FIMV_SW_RESET);
 		/*  All reset except for MC */
 		mfc_write(dev, 0x3e2, S5P_FIMV_SW_RESET);
 		mdelay(10);

 		timeout = jiffies + msecs_to_jiffies(MFC_BW_TIMEOUT);
 		/* Check MC status */
 		do {
 			if (time_after(jiffies, timeout)) {
 				mfc_err("Timeout while resetting MFC\n");
 				return -EIO;
 			}

 			mc_status = mfc_read(dev, S5P_FIMV_MC_STATUS);

 		} while (mc_status & 0x3);

 		mfc_write(dev, 0x0, S5P_FIMV_SW_RESET);
 		mfc_write(dev, 0x3fe, S5P_FIMV_SW_RESET);
 	}

 	mfc_debug_leave();
 	return 0;
 }

 static inline void s5p_mfc_init_memctrl(struct s5p_mfc_dev *dev)
 {
 	if (IS_MFCV6_PLUS(dev)) {
 		mfc_write(dev, dev->bank1, S5P_FIMV_RISC_BASE_ADDRESS_V6);
 		mfc_debug(2, "Base Address : %08x\n", dev->bank1);
 	} else {
 		mfc_write(dev, dev->bank1, S5P_FIMV_MC_DRAMBASE_ADR_A);
 		mfc_write(dev, dev->bank2, S5P_FIMV_MC_DRAMBASE_ADR_B);
 		mfc_debug(2, "Bank1: %08x, Bank2: %08x\n",
 				dev->bank1, dev->bank2);
 	}
 }

 static inline void s5p_mfc_clear_cmds(struct s5p_mfc_dev *dev)
 {
 	if (IS_MFCV6_PLUS(dev)) {
 		/* Zero initialization should be done before RESET.
 		 * Nothing to do here. */
 	} else {
 		mfc_write(dev, 0xffffffff, S5P_FIMV_SI_CH0_INST_ID);
 		mfc_write(dev, 0xffffffff, S5P_FIMV_SI_CH1_INST_ID);
 		mfc_write(dev, 0, S5P_FIMV_RISC2HOST_CMD);
 		mfc_write(dev, 0, S5P_FIMV_HOST2RISC_CMD);
 	}
 }

 /* Initialize hardware */
 int s5p_mfc_init_hw(struct s5p_mfc_dev *dev)
 {
 	unsigned int ver;
 	int ret;

 	mfc_debug_enter();
 	if (!dev->fw_virt_addr) {
 		mfc_err("Firmware memory is not allocated.\n");
 		return -EINVAL;
 	}

 	/* 0. MFC reset */
 	mfc_debug(2, "MFC reset..\n");
 	s5p_mfc_clock_on();
 	ret = s5p_mfc_reset(dev);
 	if (ret) {
 		mfc_err("Failed to reset MFC - timeout\n");
 		return ret;
 	}
 	mfc_debug(2, "Done MFC reset..\n");
 	/* 1. Set DRAM base Addr */
 	s5p_mfc_init_memctrl(dev);
 	/* 2. Initialize registers of channel I/F */
 	s5p_mfc_clear_cmds(dev);
 	/* 3. Release reset signal to the RISC */
 	s5p_mfc_clean_dev_int_flags(dev);
 	if (IS_MFCV6_PLUS(dev))
 		mfc_write(dev, 0x1, S5P_FIMV_RISC_ON_V6);
 	else
 		mfc_write(dev, 0x3ff, S5P_FIMV_SW_RESET);
 	mfc_debug(2, "Will now wait for completion of firmware transfer\n");
 	if (s5p_mfc_wait_for_done_dev(dev, S5P_MFC_R2H_CMD_FW_STATUS_RET)) {
 		mfc_err("Failed to load firmware\n");
 		s5p_mfc_reset(dev);
 		s5p_mfc_clock_off();
 		return -EIO;
 	}
 	s5p_mfc_clean_dev_int_flags(dev);
 	/* 4. Initialize firmware */
 	ret = s5p_mfc_hw_call(dev->mfc_cmds, sys_init_cmd, dev);
 	if (ret) {
 		mfc_err("Failed to send command to MFC - timeout\n");
 		s5p_mfc_reset(dev);
 		s5p_mfc_clock_off();
 		return ret;
 	}
 	mfc_debug(2, "Ok, now will write a command to init the system\n");
 	if (s5p_mfc_wait_for_done_dev(dev, S5P_MFC_R2H_CMD_SYS_INIT_RET)) {
 		mfc_err("Failed to load firmware\n");
 		s5p_mfc_reset(dev);
 		s5p_mfc_clock_off();
 		return -EIO;
 	}
 	dev->int_cond = 0;
 	if (dev->int_err != 0 || dev->int_type !=
 					S5P_MFC_R2H_CMD_SYS_INIT_RET) {
 		/* Failure. */
 		mfc_err("Failed to init firmware - error: %d int: %d\n",
 						dev->int_err, dev->int_type);
 		s5p_mfc_reset(dev);
 		s5p_mfc_clock_off();
 		return -EIO;
 	}
 	if (IS_MFCV6_PLUS(dev))
 		ver = mfc_read(dev, S5P_FIMV_FW_VERSION_V6);
 	else
 		ver = mfc_read(dev, S5P_FIMV_FW_VERSION);

 	mfc_debug(2, "MFC F/W version : %02xyy, %02xmm, %02xdd\n",
 		(ver >> 16) & 0xFF, (ver >> 8) & 0xFF, ver & 0xFF);
 	s5p_mfc_clock_off();
 	mfc_debug_leave();
 	return 0;
 }


 /* Deinitialize hardware */
 void s5p_mfc_deinit_hw(struct s5p_mfc_dev *dev)
 {
 	s5p_mfc_clock_on();

 	s5p_mfc_reset(dev);
 	s5p_mfc_hw_call(dev->mfc_ops, release_dev_context_buffer, dev);

 	s5p_mfc_clock_off();
 }

 int s5p_mfc_sleep(struct s5p_mfc_dev *dev)
 {
 	int ret;

 	mfc_debug_enter();
 	s5p_mfc_clock_on();
 	s5p_mfc_clean_dev_int_flags(dev);
 	ret = s5p_mfc_hw_call(dev->mfc_cmds, sleep_cmd, dev);
 	if (ret) {
 		mfc_err("Failed to send command to MFC - timeout\n");
 		return ret;
 	}
 	if (s5p_mfc_wait_for_done_dev(dev, S5P_MFC_R2H_CMD_SLEEP_RET)) {
 		mfc_err("Failed to sleep\n");
 		return -EIO;
 	}
 	s5p_mfc_clock_off();
 	dev->int_cond = 0;
 	if (dev->int_err != 0 || dev->int_type !=
 						S5P_MFC_R2H_CMD_SLEEP_RET) {
 		/* Failure. */
 		mfc_err("Failed to sleep - error: %d int: %d\n", dev->int_err,
 								dev->int_type);
 		return -EIO;
 	}
 	mfc_debug_leave();
 	return ret;
 }

 int s5p_mfc_wakeup(struct s5p_mfc_dev *dev)
 {
 	int ret;

 	mfc_debug_enter();
 	/* 0. MFC reset */
 	mfc_debug(2, "MFC reset..\n");
 	s5p_mfc_clock_on();
 	ret = s5p_mfc_reset(dev);
 	if (ret) {
 		mfc_err("Failed to reset MFC - timeout\n");
 		return ret;
 	}
 	mfc_debug(2, "Done MFC reset..\n");
 	/* 1. Set DRAM base Addr */
 	s5p_mfc_init_memctrl(dev);
 	/* 2. Initialize registers of channel I/F */
 	s5p_mfc_clear_cmds(dev);
 	s5p_mfc_clean_dev_int_flags(dev);
 	/* 3. Initialize firmware */
 	ret = s5p_mfc_hw_call(dev->mfc_cmds, wakeup_cmd, dev);
 	if (ret) {
 		mfc_err("Failed to send command to MFC - timeout\n");
 		return ret;
 	}
 	/* 4. Release reset signal to the RISC */
 	if (IS_MFCV6_PLUS(dev))
 		mfc_write(dev, 0x1, S5P_FIMV_RISC_ON_V6);
 	else
 		mfc_write(dev, 0x3ff, S5P_FIMV_SW_RESET);
 	mfc_debug(2, "Ok, now will write a command to wakeup the system\n");
 	if (s5p_mfc_wait_for_done_dev(dev, S5P_MFC_R2H_CMD_WAKEUP_RET)) {
 		mfc_err("Failed to load firmware\n");
 		return -EIO;
 	}
 	s5p_mfc_clock_off();
 	dev->int_cond = 0;
 	if (dev->int_err != 0 || dev->int_type !=
 						S5P_MFC_R2H_CMD_WAKEUP_RET) {
 		/* Failure. */
 		mfc_err("Failed to wakeup - error: %d int: %d\n", dev->int_err,
 								dev->int_type);
 		return -EIO;
 	}
 	mfc_debug_leave();
 	return 0;
 }
	/*
	* linux/drivers/media/platform/s5p-mfc/s5p_mfc_ctrl.c
	*
	* Copyright (c) 2010 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 as published by
	* the Free Software Foundation; either version 2 of the License, or
	* (at your option) any later version.
	*/

	#include <linux/delay.h>
	#include <linux/err.h>
	#include <linux/firmware.h>
	#include <linux/jiffies.h>
	#include <linux/sched.h>
	#include "s5p_mfc_cmd.h"
	#include "s5p_mfc_common.h"
	#include "s5p_mfc_debug.h"
	#include "s5p_mfc_intr.h"
	#include "s5p_mfc_opr.h"
	#include "s5p_mfc_pm.h"

	/* Allocate memory for firmware */
	int s5p_mfc_alloc_firmware(struct s5p_mfc_dev *dev)
	{
	void *bank2_virt;
	dma_addr_t bank2_dma_addr;

	dev->fw_size = dev->variant->buf_size->fw;

	if (dev->fw_virt_addr) {
	mfc_err("Attempting to allocate firmware when it seems that it is already loaded\n");
	return -ENOMEM;
	}

	dev->fw_virt_addr = dma_alloc_coherent(dev->mem_dev_l, dev->fw_size,
	&dev->bank1, GFP_KERNEL);

	if (IS_ERR_OR_NULL(dev->fw_virt_addr)) {
	dev->fw_virt_addr = NULL;
	mfc_err("Allocating bitprocessor buffer failed\n");
	return -ENOMEM;
	}

	dev->bank1 = dev->bank1;

	if (HAS_PORTNUM(dev) && IS_TWOPORT(dev)) {
	bank2_virt = dma_alloc_coherent(dev->mem_dev_r, 1 << MFC_BASE_ALIGN_ORDER,
	&bank2_dma_addr, GFP_KERNEL);

	if (IS_ERR(dev->fw_virt_addr)) {
	mfc_err("Allocating bank2 base failed\n");
	dma_free_coherent(dev->mem_dev_l, dev->fw_size,
	dev->fw_virt_addr, dev->bank1);
	dev->fw_virt_addr = NULL;
	return -ENOMEM;
	}

	/* Valid buffers passed to MFC encoder with LAST_FRAME command
	* should not have address of bank2 - MFC will treat it as a null frame.
	* To avoid such situation we set bank2 address below the pool address.
	*/
	dev->bank2 = bank2_dma_addr - (1 << MFC_BASE_ALIGN_ORDER);

	dma_free_coherent(dev->mem_dev_r, 1 << MFC_BASE_ALIGN_ORDER,
	bank2_virt, bank2_dma_addr);

	} else {
	/* In this case bank2 can point to the same address as bank1.
	* Firmware will always occupy the beginning of this area so it is
	* impossible having a video frame buffer with zero address. */
	dev->bank2 = dev->bank1;
	}
	return 0;
	}

	/* Load firmware */
	int s5p_mfc_load_firmware(struct s5p_mfc_dev *dev)
	{
	struct firmware *fw_blob;
	int err;

	/* Firmare has to be present as a separate file or compiled
	* into kernel. */
	mfc_debug_enter();

	err = request_firmware((const struct firmware **)&fw_blob,
	dev->variant->fw_name, dev->v4l2_dev.dev);
	if (err != 0) {
	mfc_err("Firmware is not present in the /lib/firmware directory nor compiled in kernel\n");
	return -EINVAL;
	}
	if (fw_blob->size > dev->fw_size) {
	mfc_err("MFC firmware is too big to be loaded\n");
	release_firmware(fw_blob);
	return -ENOMEM;
	}
	if (!dev->fw_virt_addr) {
	mfc_err("MFC firmware is not allocated\n");
	release_firmware(fw_blob);
	return -EINVAL;
	}
	memcpy(dev->fw_virt_addr, fw_blob->data, fw_blob->size);
	wmb();
	release_firmware(fw_blob);
	mfc_debug_leave();
	return 0;
	}

	/* Reload firmware to MFC */
	int s5p_mfc_reload_firmware(struct s5p_mfc_dev *dev)
	{
	struct firmware *fw_blob;
	int err;

	/* Firmare has to be present as a separate file or compiled
	* into kernel. */
	mfc_debug_enter();

	err = request_firmware((const struct firmware **)&fw_blob,
	dev->variant->fw_name, dev->v4l2_dev.dev);
	if (err != 0) {
	mfc_err("Firmware is not present in the /lib/firmware directory nor compiled in kernel\n");
	return -EINVAL;
	}
	if (fw_blob->size > dev->fw_size) {
	mfc_err("MFC firmware is too big to be loaded\n");
	release_firmware(fw_blob);
	return -ENOMEM;
	}
	if (!dev->fw_virt_addr) {
	mfc_err("MFC firmware is not allocated\n");
	release_firmware(fw_blob);
	return -EINVAL;
	}
	memcpy(dev->fw_virt_addr, fw_blob->data, fw_blob->size);
	wmb();
	release_firmware(fw_blob);
	mfc_debug_leave();
	return 0;
	}

	/* Release firmware memory */
	int s5p_mfc_release_firmware(struct s5p_mfc_dev *dev)
	{
	/* Before calling this function one has to make sure
	* that MFC is no longer processing */
	if (!dev->fw_virt_addr)
	return -EINVAL;
	dma_free_coherent(dev->mem_dev_l, dev->fw_size, dev->fw_virt_addr,
	dev->bank1);
	dev->fw_virt_addr = NULL;
	return 0;
	}

	/* Reset the device */
	int s5p_mfc_reset(struct s5p_mfc_dev *dev)
	{
	unsigned int mc_status;
	unsigned long timeout;
	int i;

	mfc_debug_enter();

	if (IS_MFCV6_PLUS(dev)) {
	/* Reset IP */
	/* except RISC, reset */
	mfc_write(dev, 0xFEE, S5P_FIMV_MFC_RESET_V6);
	/* reset release */
	mfc_write(dev, 0x0, S5P_FIMV_MFC_RESET_V6);

	/* Zero Initialization of MFC registers */
	mfc_write(dev, 0, S5P_FIMV_RISC2HOST_CMD_V6);
	mfc_write(dev, 0, S5P_FIMV_HOST2RISC_CMD_V6);
	mfc_write(dev, 0, S5P_FIMV_FW_VERSION_V6);

	for (i = 0; i < S5P_FIMV_REG_CLEAR_COUNT_V6; i++)
	mfc_write(dev, 0, S5P_FIMV_REG_CLEAR_BEGIN_V6 + (i*4));

	/* Reset */
	mfc_write(dev, 0, S5P_FIMV_RISC_ON_V6);
	mfc_write(dev, 0x1FFF, S5P_FIMV_MFC_RESET_V6);
	mfc_write(dev, 0, S5P_FIMV_MFC_RESET_V6);
	} else {
	/* Stop procedure */
	/* reset RISC */
	mfc_write(dev, 0x3f6, S5P_FIMV_SW_RESET);
	/* All reset except for MC */
	mfc_write(dev, 0x3e2, S5P_FIMV_SW_RESET);
	mdelay(10);

	timeout = jiffies + msecs_to_jiffies(MFC_BW_TIMEOUT);
	/* Check MC status */
	do {
	if (time_after(jiffies, timeout)) {
	mfc_err("Timeout while resetting MFC\n");
	return -EIO;
	}

	mc_status = mfc_read(dev, S5P_FIMV_MC_STATUS);

	} while (mc_status & 0x3);

	mfc_write(dev, 0x0, S5P_FIMV_SW_RESET);
	mfc_write(dev, 0x3fe, S5P_FIMV_SW_RESET);
	}

	mfc_debug_leave();
	return 0;
	}

	static inline void s5p_mfc_init_memctrl(struct s5p_mfc_dev *dev)
	{
	if (IS_MFCV6_PLUS(dev)) {
	mfc_write(dev, dev->bank1, S5P_FIMV_RISC_BASE_ADDRESS_V6);
	mfc_debug(2, "Base Address : %08x\n", dev->bank1);
	} else {
	mfc_write(dev, dev->bank1, S5P_FIMV_MC_DRAMBASE_ADR_A);
	mfc_write(dev, dev->bank2, S5P_FIMV_MC_DRAMBASE_ADR_B);
	mfc_debug(2, "Bank1: %08x, Bank2: %08x\n",
	dev->bank1, dev->bank2);
	}
	}

	static inline void s5p_mfc_clear_cmds(struct s5p_mfc_dev *dev)
	{
	if (IS_MFCV6_PLUS(dev)) {
	/* Zero initialization should be done before RESET.
	* Nothing to do here. */
	} else {
	mfc_write(dev, 0xffffffff, S5P_FIMV_SI_CH0_INST_ID);
	mfc_write(dev, 0xffffffff, S5P_FIMV_SI_CH1_INST_ID);
	mfc_write(dev, 0, S5P_FIMV_RISC2HOST_CMD);
	mfc_write(dev, 0, S5P_FIMV_HOST2RISC_CMD);
	}
	}

	/* Initialize hardware */
	int s5p_mfc_init_hw(struct s5p_mfc_dev *dev)
	{
	unsigned int ver;
	int ret;

	mfc_debug_enter();
	if (!dev->fw_virt_addr) {
	mfc_err("Firmware memory is not allocated.\n");
	return -EINVAL;
	}

	/* 0. MFC reset */
	mfc_debug(2, "MFC reset..\n");
	s5p_mfc_clock_on();
	ret = s5p_mfc_reset(dev);
	if (ret) {
	mfc_err("Failed to reset MFC - timeout\n");
	return ret;
	}
	mfc_debug(2, "Done MFC reset..\n");
	/* 1. Set DRAM base Addr */
	s5p_mfc_init_memctrl(dev);
	/* 2. Initialize registers of channel I/F */
	s5p_mfc_clear_cmds(dev);
	/* 3. Release reset signal to the RISC */
	s5p_mfc_clean_dev_int_flags(dev);
	if (IS_MFCV6_PLUS(dev))
	mfc_write(dev, 0x1, S5P_FIMV_RISC_ON_V6);
	else
	mfc_write(dev, 0x3ff, S5P_FIMV_SW_RESET);
	mfc_debug(2, "Will now wait for completion of firmware transfer\n");
	if (s5p_mfc_wait_for_done_dev(dev, S5P_MFC_R2H_CMD_FW_STATUS_RET)) {
	mfc_err("Failed to load firmware\n");
	s5p_mfc_reset(dev);
	s5p_mfc_clock_off();
	return -EIO;
	}
	s5p_mfc_clean_dev_int_flags(dev);
	/* 4. Initialize firmware */
	ret = s5p_mfc_hw_call(dev->mfc_cmds, sys_init_cmd, dev);
	if (ret) {
	mfc_err("Failed to send command to MFC - timeout\n");
	s5p_mfc_reset(dev);
	s5p_mfc_clock_off();
	return ret;
	}
	mfc_debug(2, "Ok, now will write a command to init the system\n");
	if (s5p_mfc_wait_for_done_dev(dev, S5P_MFC_R2H_CMD_SYS_INIT_RET)) {
	mfc_err("Failed to load firmware\n");
	s5p_mfc_reset(dev);
	s5p_mfc_clock_off();
	return -EIO;
	}
	dev->int_cond = 0;
	if (dev->int_err != 0 \|\| dev->int_type !=
	S5P_MFC_R2H_CMD_SYS_INIT_RET) {
	/* Failure. */
	mfc_err("Failed to init firmware - error: %d int: %d\n",
	dev->int_err, dev->int_type);
	s5p_mfc_reset(dev);
	s5p_mfc_clock_off();
	return -EIO;
	}
	if (IS_MFCV6_PLUS(dev))
	ver = mfc_read(dev, S5P_FIMV_FW_VERSION_V6);
	else
	ver = mfc_read(dev, S5P_FIMV_FW_VERSION);

	mfc_debug(2, "MFC F/W version : %02xyy, %02xmm, %02xdd\n",
	(ver >> 16) & 0xFF, (ver >> 8) & 0xFF, ver & 0xFF);
	s5p_mfc_clock_off();
	mfc_debug_leave();
	return 0;
	}


	/* Deinitialize hardware */
	void s5p_mfc_deinit_hw(struct s5p_mfc_dev *dev)
	{
	s5p_mfc_clock_on();

	s5p_mfc_reset(dev);
	s5p_mfc_hw_call(dev->mfc_ops, release_dev_context_buffer, dev);

	s5p_mfc_clock_off();
	}

	int s5p_mfc_sleep(struct s5p_mfc_dev *dev)
	{
	int ret;

	mfc_debug_enter();
	s5p_mfc_clock_on();
	s5p_mfc_clean_dev_int_flags(dev);
	ret = s5p_mfc_hw_call(dev->mfc_cmds, sleep_cmd, dev);
	if (ret) {
	mfc_err("Failed to send command to MFC - timeout\n");
	return ret;
	}
	if (s5p_mfc_wait_for_done_dev(dev, S5P_MFC_R2H_CMD_SLEEP_RET)) {
	mfc_err("Failed to sleep\n");
	return -EIO;
	}
	s5p_mfc_clock_off();
	dev->int_cond = 0;
	if (dev->int_err != 0 \|\| dev->int_type !=
	S5P_MFC_R2H_CMD_SLEEP_RET) {
	/* Failure. */
	mfc_err("Failed to sleep - error: %d int: %d\n", dev->int_err,
	dev->int_type);
	return -EIO;
	}
	mfc_debug_leave();
	return ret;
	}

	int s5p_mfc_wakeup(struct s5p_mfc_dev *dev)
	{
	int ret;

	mfc_debug_enter();
	/* 0. MFC reset */
	mfc_debug(2, "MFC reset..\n");
	s5p_mfc_clock_on();
	ret = s5p_mfc_reset(dev);
	if (ret) {
	mfc_err("Failed to reset MFC - timeout\n");
	return ret;
	}
	mfc_debug(2, "Done MFC reset..\n");
	/* 1. Set DRAM base Addr */
	s5p_mfc_init_memctrl(dev);
	/* 2. Initialize registers of channel I/F */
	s5p_mfc_clear_cmds(dev);
	s5p_mfc_clean_dev_int_flags(dev);
	/* 3. Initialize firmware */
	ret = s5p_mfc_hw_call(dev->mfc_cmds, wakeup_cmd, dev);
	if (ret) {
	mfc_err("Failed to send command to MFC - timeout\n");
	return ret;
	}
	/* 4. Release reset signal to the RISC */
	if (IS_MFCV6_PLUS(dev))
	mfc_write(dev, 0x1, S5P_FIMV_RISC_ON_V6);
	else
	mfc_write(dev, 0x3ff, S5P_FIMV_SW_RESET);
	mfc_debug(2, "Ok, now will write a command to wakeup the system\n");
	if (s5p_mfc_wait_for_done_dev(dev, S5P_MFC_R2H_CMD_WAKEUP_RET)) {
	mfc_err("Failed to load firmware\n");
	return -EIO;
	}
	s5p_mfc_clock_off();
	dev->int_cond = 0;
	if (dev->int_err != 0 \|\| dev->int_type !=
	S5P_MFC_R2H_CMD_WAKEUP_RET) {
	/* Failure. */
	mfc_err("Failed to wakeup - error: %d int: %d\n", dev->int_err,
	dev->int_type);
	return -EIO;
	}
	mfc_debug_leave();
	return 0;
	}