From e5fd91f1ef340da553f7a79da9540c3db711c937 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Tue, 8 Sep 2015 01:01:14 -0300 Subject: Linux-libre 4.2-gnu --- drivers/media/pci/cobalt/cobalt-irq.c | 258 ++++++++++++++++++++++++++++++++++ 1 file changed, 258 insertions(+) create mode 100644 drivers/media/pci/cobalt/cobalt-irq.c (limited to 'drivers/media/pci/cobalt/cobalt-irq.c') diff --git a/drivers/media/pci/cobalt/cobalt-irq.c b/drivers/media/pci/cobalt/cobalt-irq.c new file mode 100644 index 000000000..d1f5898d1 --- /dev/null +++ b/drivers/media/pci/cobalt/cobalt-irq.c @@ -0,0 +1,258 @@ +/* + * cobalt interrupt handling + * + * Copyright 2012-2015 Cisco Systems, Inc. and/or its affiliates. + * All rights reserved. + * + * This program is free software; you may redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * 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. + */ + +#include + +#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--; + } + v4l2_get_timestamp(&cb->vb.v4l2_buf.timestamp); + /* TODO: the sequence number should be read from the FPGA so we + also know about dropped frames. */ + cb->vb.v4l2_buf.sequence = s->sequence++; + vb2_buffer_done(&cb->vb, (skip || s->unstable_frame) ? + VB2_BUF_STATE_REQUEUEING : 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); +} -- cgit v1.2.3-54-g00ecf