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- /****************************************************************************
- *
- * The MIT License (MIT)
- *
- * Copyright (c) 2020 VeriSilicon Holdings Co., Ltd.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
- * DEALINGS IN THE SOFTWARE.
- *
- *****************************************************************************
- *
- * The GPL License (GPL)
- *
- * Copyright (c) 2020 VeriSilicon Holdings Co., Ltd.
- *
- * 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.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program;
- *
- *****************************************************************************
- *
- * Note: This software is released under dual MIT and GPL licenses. A
- * recipient may use this file under the terms of either the MIT license or
- * GPL License. If you wish to use only one license not the other, you can
- * indicate your decision by deleting one of the above license notices in your
- * version of this file.
- *
- *****************************************************************************/
- #ifdef __KERNEL__
- # include "dwe_driver.h"
- # include "video/vvbuf.h"
- #endif
- #include "dwe_ioctl.h"
- #include "dwe_regs.h"
- #if defined(__KERNEL__) && defined(ENABLE_IRQ)
- static int update_dma_buffer(struct dwe_ic_dev *dev)
- {
- int no_dist_map_err, overflow_err;
- int which;
- u32 dewarp_ctrl;
- dwe_enable_bus(dev, 0);
- if (dev->dst)
- return -EBUSY;
- if (dev->src) {
- vvbuf_ready(dev->sink_bctx, dev->src->pad, dev->src);
- dev->src = NULL;
- }
- dev->src = vvbuf_try_dqbuf(dev->sink_bctx);
- if (!dev->src) {
- dev->error |= BUF_ERR_UNDERFLOW;
- return -ENOMEM;
- }
- dev->error &= ~BUF_ERR_UNDERFLOW;
- if (!dev->get_index) {
- dev->error |= BUF_ERR_WRONGSTATE;
- dev->src = NULL;
- return -ENXIO;
- }
- dev->index = dev->get_index(dev, dev->src);
- if (dev->index < 0 || dev->index >= MAX_DWE_NUM) {
- dev->error |= BUF_ERR_WRONGSTATE;
- dev->src = NULL;
- return -ENXIO;
- }
- dev->error &= ~BUF_ERR_WRONGSTATE;
- if (!(*dev->state[dev->index] & STATE_DRIVER_STARTED)) {
- vvbuf_try_dqbuf_done(dev->sink_bctx, dev->src);
- vvbuf_ready(dev->sink_bctx, dev->src->pad, dev->src);
- dev->error |= BUF_ERR_UNDERFLOW;
- dev->src = NULL;
- return 0;
- }
- no_dist_map_err = BUF_ERR_NO_DIST_MAP0 << dev->index;
- if (!dev->dist_map[dev->index]) {
- dev->error |= no_dist_map_err;
- dev->src = NULL;
- return -ENOMEM;
- }
- dev->error &= ~no_dist_map_err;
- overflow_err = BUF_ERR_OVERFLOW0 << dev->index;
- dev->dst = vvbuf_try_dqbuf(dev->src_bctx[dev->index]);
- if (!dev->dst) {
- if (!(*dev->state[dev->index] & STATE_STREAM_STARTED)) {
- vvbuf_try_dqbuf_done(dev->sink_bctx, dev->src);
- vvbuf_ready(dev->sink_bctx, dev->src->pad, dev->src);
- }
- dev->error |= overflow_err;
- dev->src = NULL;
- return -ENOMEM;
- }
- dev->error &= ~overflow_err;
- vvbuf_try_dqbuf_done(dev->sink_bctx, dev->src);
- vvbuf_try_dqbuf_done(dev->src_bctx[dev->index], dev->dst);
- which = dev->which[dev->index];
- dwe_s_params(dev, &dev->info[dev->index][which]);
- dwe_set_buffer(dev, &dev->info[dev->index][which], dev->dst->dma);
- dwe_set_lut(dev, dev->dist_map[dev->index][which]);
- dwe_start_dma_read(dev, &dev->info[dev->index][which], dev->src->dma);
- dewarp_ctrl = dwe_read_reg(dev, DEWARP_CTRL);
- dwe_write_reg(dev, DEWARP_CTRL, dewarp_ctrl | 2);
- dwe_write_reg(dev, DEWARP_CTRL, dewarp_ctrl);
- dwe_write_reg(dev, INTERRUPT_STATUS, INT_MSK_STATUS_MASK);
- dwe_enable_bus(dev, 1);
- return 0;
- }
- int dwe_on_buf_update(struct dwe_ic_dev *dev)
- {
- int rc = 0;
- unsigned long flags;
- if (dev) {
- spin_lock_irqsave(&dev->irqlock, flags);
- if (dev->error)
- rc = update_dma_buffer(dev);
- spin_unlock_irqrestore(&dev->irqlock, flags);
- }
- return rc;
- }
- void dwe_clear_interrupts(struct dwe_ic_dev *dev)
- {
- u32 status;
- u32 clr;
- status = dwe_read_reg(dev, INTERRUPT_STATUS);
- clr = (status & 0xFF) << 24;
- dwe_write_reg(dev, INTERRUPT_STATUS, clr);
- }
- irqreturn_t dwe_hw_isr(int irq, void *data)
- {
- struct dwe_ic_dev *dev = (struct dwe_ic_dev *)data;
- u32 status;
- u32 clr;
- unsigned long flags;
- if (!dev)
- return IRQ_HANDLED;
- status = dwe_read_reg(dev, INTERRUPT_STATUS);
- if (status & INT_FRAME_DONE) {
- clr = (status & 0xFF) << 24;
- dwe_write_reg(dev, INTERRUPT_STATUS, clr);
- spin_lock_irqsave(&dev->irqlock, flags);
- if (dev->dst) {
- vvbuf_ready(dev->src_bctx[dev->index],
- dev->dst->pad, dev->dst);
- dev->dst = NULL;
- }
- update_dma_buffer(dev);
- spin_unlock_irqrestore(&dev->irqlock, flags);
- }
- return IRQ_HANDLED;
- }
- #endif
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