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/*
* drivers/media/video/samsung/mfc50/mfc_intr.c
*
* C file for Samsung MFC (Multi Function Codec - FIMV) driver
*
* Jaeryul Oh, Copyright (c) 2009 Samsung Electronics
* http://www.samsungsemi.com/
*
* Change Logs
* 2009.09.14 - Beautify source code (Key Young, Park)
* 2009.09.21 - Implement clock & power gating.
* including suspend & resume fuction. (Key Young, Park)
* 2009.10.09 - Add error handling rountine (Key Young, Park)
* 2009.10.13 - Change wait_for_done (Key Young, Park)
* 2009.11.04 - remove mfc_common.[ch]
* seperate buffer alloc & set (Key Young, Park)
*
* 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/wait.h>
#include <linux/sched.h>
#include <linux/io.h>
#include <plat/regs-mfc.h>
#include "mfc_logmsg.h"
#include "mfc_opr.h"
#include "mfc_memory.h"
#include "mfc_intr.h"
#define MFC_WAIT_1_TIME 100
#define MFC_WAIT_2_TIME 200
#define MFC_WAIT_3_TIME 400
#define MFC_WAIT_4_TIME 600
#define MFC_WAIT_5_TIME 800
#define MFC_WAIT_6_TIME 1000
#define ENABLE_MFC_INTERRUPT_DEBUG 0 /* 0: Disable 1: Enable */
#if defined(MFC_REQUEST_TIME)
struct timeval mfc_wakeup_before;
struct timeval mfc_wakeup_after;
#endif
static unsigned int mfc_int_type;
static unsigned int mfc_disp_err_status;
static unsigned int mfc_dec_err_status;
static bool irq_sync;
static DECLARE_WAIT_QUEUE_HEAD(mfc_wait_queue);
static DEFINE_SPINLOCK(mfc_irq_lock);
#if !defined(MFC_POLLING)
irqreturn_t mfc_irq(int irq, void *dev_id)
{
unsigned int int_reason;
unsigned int err_status;
int_reason = READL(MFC_RISC2HOST_COMMAND) & 0x1FFFF;
err_status = READL(MFC_RISC2HOST_ARG2);
mfc_disp_err_status = err_status >> 16;
mfc_dec_err_status = err_status & 0xFFFF;
mfc_debug_L0("mfc_irq() : Interrupt !! : %d\n", int_reason);
if (((int_reason & R2H_CMD_FRAME_DONE_RET) == R2H_CMD_FRAME_DONE_RET) ||
((int_reason & R2H_CMD_SEQ_DONE_RET) == R2H_CMD_SEQ_DONE_RET) ||
((int_reason & R2H_CMD_SYS_INIT_RET) == R2H_CMD_SYS_INIT_RET) ||
((int_reason & R2H_CMD_OPEN_INSTANCE_RET) == R2H_CMD_OPEN_INSTANCE_RET) ||
((int_reason & R2H_CMD_CLOSE_INSTANCE_RET) == R2H_CMD_CLOSE_INSTANCE_RET) ||
((int_reason & R2H_CMD_INIT_BUFFERS_RET) == R2H_CMD_INIT_BUFFERS_RET) ||
((int_reason & R2H_CMD_DECODE_ERR_RET) == R2H_CMD_DECODE_ERR_RET) ||
((int_reason & R2H_CMD_SLICE_DONE_RET) == R2H_CMD_SLICE_DONE_RET) ||
((int_reason & R2H_CMD_ERROR_RET) == R2H_CMD_ERROR_RET)) {
mfc_int_type = int_reason;
irq_sync = true;
wake_up(&mfc_wait_queue);
} else {
irq_sync = false;
mfc_info("Strange Interrupt !! : %d\n", int_reason);
}
WRITEL(0, MFC_RISC_HOST_INT);
WRITEL(0, MFC_RISC2HOST_COMMAND);
WRITEL(0xffff, MFC_SI_RTN_CHID);
return IRQ_HANDLED;
}
#endif
void mfc_interrupt_debug(int nCnt)
{
int nn = 0;
for (nn = 0; nn < nCnt; nn++) {
mdelay(100);
mfc_err("[%d] Timeout (0x64: 0x%08x) (0xF4: 0x%08x)\n", nn, READL(0x64), READL(0xF4));
}
}
int mfc_wait_for_done(enum mfc_wait_done_type command)
{
unsigned int nwait_time = 100;
unsigned int ret_val = 1;
unsigned long flags;
if ((command == R2H_CMD_CLOSE_INSTANCE_RET) ||
(command == R2H_CMD_OPEN_INSTANCE_RET) ||
(command == R2H_CMD_SYS_INIT_RET) ||
(command == R2H_CMD_FW_STATUS_RET))
nwait_time = MFC_WAIT_6_TIME;
else
nwait_time = MFC_WAIT_2_TIME;
#if defined(MFC_REQUEST_TIME)
long sec, msec;
#endif
#if defined(MFC_POLLING)
unsigned long timeo = jiffies;
timeo += 20; /* waiting for 100ms */
#endif
#if defined(MFC_REQUEST_TIME)
do_gettimeofday(&mfc_wakeup_before);
if (mfc_wakeup_before.tv_usec - mfc_wakeup_after.tv_usec < 0) {
msec = 1000000 + mfc_wakeup_before.tv_usec - mfc_wakeup_after.tv_usec;
sec = mfc_wakeup_before.tv_sec - mfc_wakeup_after.tv_sec - 1;
} else {
msec = mfc_wakeup_before.tv_usec - mfc_wakeup_after.tv_usec;
sec = mfc_wakeup_before.tv_sec - mfc_wakeup_after.tv_sec;
}
#endif
#if defined(MFC_POLLING)
while (time_before(jiffies, timeo))
ret_val = READL(MFC_RISC2HOST_COMMAND) & 0x1ffff;
if (ret_val != 0) {
WRITEL(0, MFC_RISC_HOST_INT);
WRITEL(0, MFC_RISC2HOST_COMMAND);
WRITEL(0xffff, MFC_SI_RTN_CHID);
mfc_int_type = ret_val;
break;
}
msleep_interruptible(2);
}
if (ret_val == 0)
printk(KERN_INFO "MFC timeouted!\n");
#else
if (wait_event_timeout(mfc_wait_queue, irq_sync, nwait_time) == 0) {
ret_val = 0;
mfc_err("Interrupt Time Out(Cmd: %d) (Ver: 0x%08x) (0x64: 0x%08x) (0xF4: 0x%08x) (0x80: 0x%08x)\n", command, READL(0x58), READL(0x64), READL(0xF4), READL(0x80));
#if ENABLE_MFC_INTERRUPT_DEBUG /* For MFC Interrupt Debugging. */
mfc_interrupt_debug(10);
#endif
mfc_int_type = 0;
return ret_val;
} else if (mfc_int_type == R2H_CMD_DECODE_ERR_RET) {
mfc_err("Decode Error Returned Disp Error Status(%d), Dec Error Status(%d)\n", mfc_disp_err_status, mfc_dec_err_status);
} else if (command != mfc_int_type) {
mfc_err("Interrupt Error Returned (%d) waiting for (%d)\n", mfc_int_type, command);
}
#endif
spin_lock_irqsave(&mfc_irq_lock, flags);
irq_sync = false;
spin_unlock_irqrestore(&mfc_irq_lock, flags);
#if defined(MFC_REQUEST_TIME)
do_gettimeofday(&mfc_wakeup_after);
if (mfc_wakeup_after.tv_usec - mfc_wakeup_before.tv_usec < 0) {
msec = 1000000 + mfc_wakeup_after.tv_usec - mfc_wakeup_before.tv_usec;
sec = mfc_wakeup_after.tv_sec - mfc_wakeup_before.tv_sec - 1;
} else {
msec = mfc_wakeup_after.tv_usec - mfc_wakeup_before.tv_usec;
sec = mfc_wakeup_after.tv_sec - mfc_wakeup_before.tv_sec;
}
mfc_info("mfc_wait_for_done: mfc request interval time is %ld(sec), %ld(msec)\n", sec, msec);
#endif
ret_val = mfc_int_type;
mfc_int_type = 0;
return ret_val;
}
int mfc_return_code(void)
{
return mfc_dec_err_status;
}
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