1 /* 2 * cobalt interrupt handling 3 * 4 * Copyright 2012-2015 Cisco Systems, Inc. and/or its affiliates. 5 * All rights reserved. 6 * 7 * This program is free software; you may redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; version 2 of the License. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 12 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 13 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 14 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 15 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 16 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 17 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 18 * SOFTWARE. 19 */ 20 21 #include <media/adv7604.h> 22 23 #include "cobalt-driver.h" 24 #include "cobalt-irq.h" 25 #include "cobalt-omnitek.h" 26 27 static void cobalt_dma_stream_queue_handler(struct cobalt_stream *s) 28 { 29 struct cobalt *cobalt = s->cobalt; 30 int rx = s->video_channel; 31 volatile struct m00473_freewheel_regmap __iomem *fw = 32 COBALT_CVI_FREEWHEEL(s->cobalt, rx); 33 volatile struct m00233_video_measure_regmap __iomem *vmr = 34 COBALT_CVI_VMR(s->cobalt, rx); 35 volatile struct m00389_cvi_regmap __iomem *cvi = 36 COBALT_CVI(s->cobalt, rx); 37 volatile struct m00479_clk_loss_detector_regmap __iomem *clkloss = 38 COBALT_CVI_CLK_LOSS(s->cobalt, rx); 39 struct cobalt_buffer *cb; 40 bool skip = false; 41 42 spin_lock(&s->irqlock); 43 44 if (list_empty(&s->bufs)) { 45 pr_err("no buffers!\n"); 46 spin_unlock(&s->irqlock); 47 return; 48 } 49 50 /* Give the fresh filled up buffer to the user. 51 * Note that the interrupt is only sent if the DMA can continue 52 * with a new buffer, so it is always safe to return this buffer 53 * to userspace. */ 54 cb = list_first_entry(&s->bufs, struct cobalt_buffer, list); 55 list_del(&cb->list); 56 spin_unlock(&s->irqlock); 57 58 if (s->is_audio || s->is_output) 59 goto done; 60 61 if (s->unstable_frame) { 62 uint32_t stat = vmr->irq_status; 63 64 vmr->irq_status = stat; 65 if (!(vmr->status & M00233_STATUS_BITMAP_INIT_DONE_MSK)) { 66 cobalt_dbg(1, "!init_done\n"); 67 if (s->enable_freewheel) 68 goto restart_fw; 69 goto done; 70 } 71 72 if (clkloss->status & M00479_STATUS_BITMAP_CLOCK_MISSING_MSK) { 73 clkloss->ctrl = 0; 74 clkloss->ctrl = M00479_CTRL_BITMAP_ENABLE_MSK; 75 cobalt_dbg(1, "no clock\n"); 76 if (s->enable_freewheel) 77 goto restart_fw; 78 goto done; 79 } 80 if ((stat & (M00233_IRQ_STATUS_BITMAP_VACTIVE_AREA_MSK | 81 M00233_IRQ_STATUS_BITMAP_HACTIVE_AREA_MSK)) || 82 vmr->vactive_area != s->timings.bt.height || 83 vmr->hactive_area != s->timings.bt.width) { 84 cobalt_dbg(1, "unstable\n"); 85 if (s->enable_freewheel) 86 goto restart_fw; 87 goto done; 88 } 89 if (!s->enable_cvi) { 90 s->enable_cvi = true; 91 cvi->control = M00389_CONTROL_BITMAP_ENABLE_MSK; 92 goto done; 93 } 94 if (!(cvi->status & M00389_STATUS_BITMAP_LOCK_MSK)) { 95 cobalt_dbg(1, "cvi no lock\n"); 96 if (s->enable_freewheel) 97 goto restart_fw; 98 goto done; 99 } 100 if (!s->enable_freewheel) { 101 cobalt_dbg(1, "stable\n"); 102 s->enable_freewheel = true; 103 fw->ctrl = 0; 104 goto done; 105 } 106 cobalt_dbg(1, "enabled fw\n"); 107 vmr->control = M00233_CONTROL_BITMAP_ENABLE_MEASURE_MSK | 108 M00233_CONTROL_BITMAP_ENABLE_INTERRUPT_MSK; 109 fw->ctrl = M00473_CTRL_BITMAP_ENABLE_MSK; 110 s->enable_freewheel = false; 111 s->unstable_frame = false; 112 s->skip_first_frames = 2; 113 skip = true; 114 goto done; 115 } 116 if (fw->status & M00473_STATUS_BITMAP_FREEWHEEL_MODE_MSK) { 117 restart_fw: 118 cobalt_dbg(1, "lost lock\n"); 119 vmr->control = M00233_CONTROL_BITMAP_ENABLE_MEASURE_MSK; 120 fw->ctrl = M00473_CTRL_BITMAP_ENABLE_MSK | 121 M00473_CTRL_BITMAP_FORCE_FREEWHEEL_MODE_MSK; 122 cvi->control = 0; 123 s->unstable_frame = true; 124 s->enable_freewheel = false; 125 s->enable_cvi = false; 126 } 127 done: 128 if (s->skip_first_frames) { 129 skip = true; 130 s->skip_first_frames--; 131 } 132 v4l2_get_timestamp(&cb->vb.v4l2_buf.timestamp); 133 /* TODO: the sequence number should be read from the FPGA so we 134 also know about dropped frames. */ 135 cb->vb.v4l2_buf.sequence = s->sequence++; 136 vb2_buffer_done(&cb->vb, (skip || s->unstable_frame) ? 137 VB2_BUF_STATE_QUEUED : VB2_BUF_STATE_DONE); 138 } 139 140 irqreturn_t cobalt_irq_handler(int irq, void *dev_id) 141 { 142 struct cobalt *cobalt = (struct cobalt *)dev_id; 143 u32 dma_interrupt = 144 cobalt_read_bar0(cobalt, DMA_INTERRUPT_STATUS_REG) & 0xffff; 145 u32 mask = cobalt_read_bar1(cobalt, COBALT_SYS_STAT_MASK); 146 u32 edge = cobalt_read_bar1(cobalt, COBALT_SYS_STAT_EDGE); 147 int i; 148 149 /* Clear DMA interrupt */ 150 cobalt_write_bar0(cobalt, DMA_INTERRUPT_STATUS_REG, dma_interrupt); 151 cobalt_write_bar1(cobalt, COBALT_SYS_STAT_MASK, mask & ~edge); 152 cobalt_write_bar1(cobalt, COBALT_SYS_STAT_EDGE, edge); 153 154 for (i = 0; i < COBALT_NUM_STREAMS; i++) { 155 struct cobalt_stream *s = &cobalt->streams[i]; 156 unsigned dma_fifo_mask = 157 COBALT_SYSSTAT_VI0_LOST_DATA_MSK << (4 * s->video_channel); 158 159 if (dma_interrupt & (1 << s->dma_channel)) { 160 cobalt->irq_dma[i]++; 161 /* Give fresh buffer to user and chain newly 162 * queued buffers */ 163 cobalt_dma_stream_queue_handler(s); 164 if (!s->is_audio) { 165 edge &= ~dma_fifo_mask; 166 cobalt_write_bar1(cobalt, COBALT_SYS_STAT_MASK, 167 mask & ~edge); 168 } 169 } 170 if (s->is_audio) 171 continue; 172 if (edge & (0x20 << (4 * s->video_channel))) 173 set_bit(COBALT_STREAM_FL_ADV_IRQ, &s->flags); 174 if ((edge & mask & dma_fifo_mask) && vb2_is_streaming(&s->q)) { 175 cobalt_info("full rx FIFO %d\n", i); 176 cobalt->irq_full_fifo++; 177 } 178 } 179 180 queue_work(cobalt->irq_work_queues, &cobalt->irq_work_queue); 181 182 if (edge & mask & (COBALT_SYSSTAT_VI0_INT1_MSK | 183 COBALT_SYSSTAT_VI1_INT1_MSK | 184 COBALT_SYSSTAT_VI2_INT1_MSK | 185 COBALT_SYSSTAT_VI3_INT1_MSK | 186 COBALT_SYSSTAT_VIHSMA_INT1_MSK | 187 COBALT_SYSSTAT_VOHSMA_INT1_MSK)) 188 cobalt->irq_adv1++; 189 if (edge & mask & (COBALT_SYSSTAT_VI0_INT2_MSK | 190 COBALT_SYSSTAT_VI1_INT2_MSK | 191 COBALT_SYSSTAT_VI2_INT2_MSK | 192 COBALT_SYSSTAT_VI3_INT2_MSK | 193 COBALT_SYSSTAT_VIHSMA_INT2_MSK)) 194 cobalt->irq_adv2++; 195 if (edge & mask & COBALT_SYSSTAT_VOHSMA_INT1_MSK) 196 cobalt->irq_advout++; 197 if (dma_interrupt) 198 cobalt->irq_dma_tot++; 199 if (!(edge & mask) && !dma_interrupt) 200 cobalt->irq_none++; 201 dma_interrupt = cobalt_read_bar0(cobalt, DMA_INTERRUPT_STATUS_REG); 202 203 return IRQ_HANDLED; 204 } 205 206 void cobalt_irq_work_handler(struct work_struct *work) 207 { 208 struct cobalt *cobalt = 209 container_of(work, struct cobalt, irq_work_queue); 210 int i; 211 212 for (i = 0; i < COBALT_NUM_NODES; i++) { 213 struct cobalt_stream *s = &cobalt->streams[i]; 214 215 if (test_and_clear_bit(COBALT_STREAM_FL_ADV_IRQ, &s->flags)) { 216 u32 mask; 217 218 v4l2_subdev_call(cobalt->streams[i].sd, core, 219 interrupt_service_routine, 0, NULL); 220 mask = cobalt_read_bar1(cobalt, COBALT_SYS_STAT_MASK); 221 cobalt_write_bar1(cobalt, COBALT_SYS_STAT_MASK, 222 mask | (0x20 << (4 * s->video_channel))); 223 } 224 } 225 } 226 227 void cobalt_irq_log_status(struct cobalt *cobalt) 228 { 229 u32 mask; 230 int i; 231 232 cobalt_info("irq: adv1=%u adv2=%u advout=%u none=%u full=%u\n", 233 cobalt->irq_adv1, cobalt->irq_adv2, cobalt->irq_advout, 234 cobalt->irq_none, cobalt->irq_full_fifo); 235 cobalt_info("irq: dma_tot=%u (", cobalt->irq_dma_tot); 236 for (i = 0; i < COBALT_NUM_STREAMS; i++) 237 pr_cont("%s%u", i ? "/" : "", cobalt->irq_dma[i]); 238 pr_cont(")\n"); 239 cobalt->irq_dma_tot = cobalt->irq_adv1 = cobalt->irq_adv2 = 0; 240 cobalt->irq_advout = cobalt->irq_none = cobalt->irq_full_fifo = 0; 241 memset(cobalt->irq_dma, 0, sizeof(cobalt->irq_dma)); 242 243 mask = cobalt_read_bar1(cobalt, COBALT_SYS_STAT_MASK); 244 cobalt_write_bar1(cobalt, COBALT_SYS_STAT_MASK, 245 mask | 246 COBALT_SYSSTAT_VI0_LOST_DATA_MSK | 247 COBALT_SYSSTAT_VI1_LOST_DATA_MSK | 248 COBALT_SYSSTAT_VI2_LOST_DATA_MSK | 249 COBALT_SYSSTAT_VI3_LOST_DATA_MSK | 250 COBALT_SYSSTAT_VIHSMA_LOST_DATA_MSK | 251 COBALT_SYSSTAT_VOHSMA_LOST_DATA_MSK | 252 COBALT_SYSSTAT_AUD_IN_LOST_DATA_MSK | 253 COBALT_SYSSTAT_AUD_OUT_LOST_DATA_MSK); 254 } 255