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// SPDX-License-Identifier: GPL-2.0-only
/*
* cobalt interrupt handling
*
* Copyright 2012-2015 Cisco Systems, Inc. and/or its affiliates.
* All rights reserved.
*/
#include <media/i2c/adv7604.h>
#include "cobalt-driver.h"
#include "cobalt-irq.h"
#include "cobalt-omnitek.h"
static void cobalt_dma_stream_queue_handler(struct cobalt_stream *s)
{
struct cobalt *cobalt = s->cobalt;
int rx = s->video_channel;
struct m00473_freewheel_regmap __iomem *fw =
COBALT_CVI_FREEWHEEL(s->cobalt, rx);
struct m00233_video_measure_regmap __iomem *vmr =
COBALT_CVI_VMR(s->cobalt, rx);
struct m00389_cvi_regmap __iomem *cvi =
COBALT_CVI(s->cobalt, rx);
struct m00479_clk_loss_detector_regmap __iomem *clkloss =
COBALT_CVI_CLK_LOSS(s->cobalt, rx);
struct cobalt_buffer *cb;
bool skip = false;
spin_lock(&s->irqlock);
if (list_empty(&s->bufs)) {
pr_err("no buffers!\n");
spin_unlock(&s->irqlock);
return;
}
/* Give the fresh filled up buffer to the user.
* Note that the interrupt is only sent if the DMA can continue
* with a new buffer, so it is always safe to return this buffer
* to userspace. */
cb = list_first_entry(&s->bufs, struct cobalt_buffer, list);
list_del(&cb->list);
spin_unlock(&s->irqlock);
if (s->is_audio || s->is_output)
goto done;
if (s->unstable_frame) {
uint32_t stat = ioread32(&vmr->irq_status);
iowrite32(stat, &vmr->irq_status);
if (!(ioread32(&vmr->status) &
M00233_STATUS_BITMAP_INIT_DONE_MSK)) {
cobalt_dbg(1, "!init_done\n");
if (s->enable_freewheel)
goto restart_fw;
goto done;
}
if (ioread32(&clkloss->status) &
M00479_STATUS_BITMAP_CLOCK_MISSING_MSK) {
iowrite32(0, &clkloss->ctrl);
iowrite32(M00479_CTRL_BITMAP_ENABLE_MSK, &clkloss->ctrl);
cobalt_dbg(1, "no clock\n");
if (s->enable_freewheel)
goto restart_fw;
goto done;
}
if ((stat & (M00233_IRQ_STATUS_BITMAP_VACTIVE_AREA_MSK |
M00233_IRQ_STATUS_BITMAP_HACTIVE_AREA_MSK)) ||
ioread32(&vmr->vactive_area) != s->timings.bt.height ||
ioread32(&vmr->hactive_area) != s->timings.bt.width) {
cobalt_dbg(1, "unstable\n");
if (s->enable_freewheel)
goto restart_fw;
goto done;
}
if (!s->enable_cvi) {
s->enable_cvi = true;
iowrite32(M00389_CONTROL_BITMAP_ENABLE_MSK, &cvi->control);
goto done;
}
if (!(ioread32(&cvi->status) & M00389_STATUS_BITMAP_LOCK_MSK)) {
cobalt_dbg(1, "cvi no lock\n");
if (s->enable_freewheel)
goto restart_fw;
goto done;
}
if (!s->enable_freewheel) {
cobalt_dbg(1, "stable\n");
s->enable_freewheel = true;
iowrite32(0, &fw->ctrl);
goto done;
}
cobalt_dbg(1, "enabled fw\n");
iowrite32(M00233_CONTROL_BITMAP_ENABLE_MEASURE_MSK |
M00233_CONTROL_BITMAP_ENABLE_INTERRUPT_MSK,
&vmr->control);
iowrite32(M00473_CTRL_BITMAP_ENABLE_MSK, &fw->ctrl);
s->enable_freewheel = false;
s->unstable_frame = false;
s->skip_first_frames = 2;
skip = true;
goto done;
}
if (ioread32(&fw->status) & M00473_STATUS_BITMAP_FREEWHEEL_MODE_MSK) {
restart_fw:
cobalt_dbg(1, "lost lock\n");
iowrite32(M00233_CONTROL_BITMAP_ENABLE_MEASURE_MSK,
&vmr->control);
iowrite32(M00473_CTRL_BITMAP_ENABLE_MSK |
M00473_CTRL_BITMAP_FORCE_FREEWHEEL_MODE_MSK,
&fw->ctrl);
iowrite32(0, &cvi->control);
s->unstable_frame = true;
s->enable_freewheel = false;
s->enable_cvi = false;
}
done:
if (s->skip_first_frames) {
skip = true;
s->skip_first_frames--;
}
cb->vb.vb2_buf.timestamp = ktime_get_ns();
/* TODO: the sequence number should be read from the FPGA so we
also know about dropped frames. */
cb->vb.sequence = s->sequence++;
vb2_buffer_done(&cb->vb.vb2_buf,
(skip || s->unstable_frame) ?
VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
}
irqreturn_t cobalt_irq_handler(int irq, void *dev_id)
{
struct cobalt *cobalt = (struct cobalt *)dev_id;
u32 dma_interrupt =
cobalt_read_bar0(cobalt, DMA_INTERRUPT_STATUS_REG) & 0xffff;
u32 mask = cobalt_read_bar1(cobalt, COBALT_SYS_STAT_MASK);
u32 edge = cobalt_read_bar1(cobalt, COBALT_SYS_STAT_EDGE);
int i;
/* Clear DMA interrupt */
cobalt_write_bar0(cobalt, DMA_INTERRUPT_STATUS_REG, dma_interrupt);
cobalt_write_bar1(cobalt, COBALT_SYS_STAT_MASK, mask & ~edge);
cobalt_write_bar1(cobalt, COBALT_SYS_STAT_EDGE, edge);
for (i = 0; i < COBALT_NUM_STREAMS; i++) {
struct cobalt_stream *s = &cobalt->streams[i];
unsigned dma_fifo_mask = s->dma_fifo_mask;
if (dma_interrupt & (1 << s->dma_channel)) {
cobalt->irq_dma[i]++;
/* Give fresh buffer to user and chain newly
* queued buffers */
cobalt_dma_stream_queue_handler(s);
if (!s->is_audio) {
edge &= ~dma_fifo_mask;
cobalt_write_bar1(cobalt, COBALT_SYS_STAT_MASK,
mask & ~edge);
}
}
if (s->is_audio)
continue;
if (edge & s->adv_irq_mask)
set_bit(COBALT_STREAM_FL_ADV_IRQ, &s->flags);
if ((edge & mask & dma_fifo_mask) && vb2_is_streaming(&s->q)) {
cobalt_info("full rx FIFO %d\n", i);
cobalt->irq_full_fifo++;
}
}
queue_work(cobalt->irq_work_queues, &cobalt->irq_work_queue);
if (edge & mask & (COBALT_SYSSTAT_VI0_INT1_MSK |
COBALT_SYSSTAT_VI1_INT1_MSK |
COBALT_SYSSTAT_VI2_INT1_MSK |
COBALT_SYSSTAT_VI3_INT1_MSK |
COBALT_SYSSTAT_VIHSMA_INT1_MSK |
COBALT_SYSSTAT_VOHSMA_INT1_MSK))
cobalt->irq_adv1++;
if (edge & mask & (COBALT_SYSSTAT_VI0_INT2_MSK |
COBALT_SYSSTAT_VI1_INT2_MSK |
COBALT_SYSSTAT_VI2_INT2_MSK |
COBALT_SYSSTAT_VI3_INT2_MSK |
COBALT_SYSSTAT_VIHSMA_INT2_MSK))
cobalt->irq_adv2++;
if (edge & mask & COBALT_SYSSTAT_VOHSMA_INT1_MSK)
cobalt->irq_advout++;
if (dma_interrupt)
cobalt->irq_dma_tot++;
if (!(edge & mask) && !dma_interrupt)
cobalt->irq_none++;
dma_interrupt = cobalt_read_bar0(cobalt, DMA_INTERRUPT_STATUS_REG);
return IRQ_HANDLED;
}
void cobalt_irq_work_handler(struct work_struct *work)
{
struct cobalt *cobalt =
container_of(work, struct cobalt, irq_work_queue);
int i;
for (i = 0; i < COBALT_NUM_NODES; i++) {
struct cobalt_stream *s = &cobalt->streams[i];
if (test_and_clear_bit(COBALT_STREAM_FL_ADV_IRQ, &s->flags)) {
u32 mask;
v4l2_subdev_call(cobalt->streams[i].sd, core,
interrupt_service_routine, 0, NULL);
mask = cobalt_read_bar1(cobalt, COBALT_SYS_STAT_MASK);
cobalt_write_bar1(cobalt, COBALT_SYS_STAT_MASK,
mask | s->adv_irq_mask);
}
}
}
void cobalt_irq_log_status(struct cobalt *cobalt)
{
u32 mask;
int i;
cobalt_info("irq: adv1=%u adv2=%u advout=%u none=%u full=%u\n",
cobalt->irq_adv1, cobalt->irq_adv2, cobalt->irq_advout,
cobalt->irq_none, cobalt->irq_full_fifo);
cobalt_info("irq: dma_tot=%u (", cobalt->irq_dma_tot);
for (i = 0; i < COBALT_NUM_STREAMS; i++)
pr_cont("%s%u", i ? "/" : "", cobalt->irq_dma[i]);
pr_cont(")\n");
cobalt->irq_dma_tot = cobalt->irq_adv1 = cobalt->irq_adv2 = 0;
cobalt->irq_advout = cobalt->irq_none = cobalt->irq_full_fifo = 0;
memset(cobalt->irq_dma, 0, sizeof(cobalt->irq_dma));
mask = cobalt_read_bar1(cobalt, COBALT_SYS_STAT_MASK);
cobalt_write_bar1(cobalt, COBALT_SYS_STAT_MASK,
mask |
COBALT_SYSSTAT_VI0_LOST_DATA_MSK |
COBALT_SYSSTAT_VI1_LOST_DATA_MSK |
COBALT_SYSSTAT_VI2_LOST_DATA_MSK |
COBALT_SYSSTAT_VI3_LOST_DATA_MSK |
COBALT_SYSSTAT_VIHSMA_LOST_DATA_MSK |
COBALT_SYSSTAT_VOHSMA_LOST_DATA_MSK |
COBALT_SYSSTAT_AUD_IN_LOST_DATA_MSK |
COBALT_SYSSTAT_AUD_OUT_LOST_DATA_MSK);
}
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