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
cobalt_dma_stream_queue_handler(struct cobalt_stream * s)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 struct m00473_freewheel_regmap __iomem *fw =
32 COBALT_CVI_FREEWHEEL(s->cobalt, rx);
33 struct m00233_video_measure_regmap __iomem *vmr =
34 COBALT_CVI_VMR(s->cobalt, rx);
35 struct m00389_cvi_regmap __iomem *cvi =
36 COBALT_CVI(s->cobalt, rx);
37 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 = ioread32(&vmr->irq_status);
63
64 iowrite32(stat, &vmr->irq_status);
65 if (!(ioread32(&vmr->status) &
66 M00233_STATUS_BITMAP_INIT_DONE_MSK)) {
67 cobalt_dbg(1, "!init_done\n");
68 if (s->enable_freewheel)
69 goto restart_fw;
70 goto done;
71 }
72
73 if (ioread32(&clkloss->status) &
74 M00479_STATUS_BITMAP_CLOCK_MISSING_MSK) {
75 iowrite32(0, &clkloss->ctrl);
76 iowrite32(M00479_CTRL_BITMAP_ENABLE_MSK, &clkloss->ctrl);
77 cobalt_dbg(1, "no clock\n");
78 if (s->enable_freewheel)
79 goto restart_fw;
80 goto done;
81 }
82 if ((stat & (M00233_IRQ_STATUS_BITMAP_VACTIVE_AREA_MSK |
83 M00233_IRQ_STATUS_BITMAP_HACTIVE_AREA_MSK)) ||
84 ioread32(&vmr->vactive_area) != s->timings.bt.height ||
85 ioread32(&vmr->hactive_area) != s->timings.bt.width) {
86 cobalt_dbg(1, "unstable\n");
87 if (s->enable_freewheel)
88 goto restart_fw;
89 goto done;
90 }
91 if (!s->enable_cvi) {
92 s->enable_cvi = true;
93 iowrite32(M00389_CONTROL_BITMAP_ENABLE_MSK, &cvi->control);
94 goto done;
95 }
96 if (!(ioread32(&cvi->status) & M00389_STATUS_BITMAP_LOCK_MSK)) {
97 cobalt_dbg(1, "cvi no lock\n");
98 if (s->enable_freewheel)
99 goto restart_fw;
100 goto done;
101 }
102 if (!s->enable_freewheel) {
103 cobalt_dbg(1, "stable\n");
104 s->enable_freewheel = true;
105 iowrite32(0, &fw->ctrl);
106 goto done;
107 }
108 cobalt_dbg(1, "enabled fw\n");
109 iowrite32(M00233_CONTROL_BITMAP_ENABLE_MEASURE_MSK |
110 M00233_CONTROL_BITMAP_ENABLE_INTERRUPT_MSK,
111 &vmr->control);
112 iowrite32(M00473_CTRL_BITMAP_ENABLE_MSK, &fw->ctrl);
113 s->enable_freewheel = false;
114 s->unstable_frame = false;
115 s->skip_first_frames = 2;
116 skip = true;
117 goto done;
118 }
119 if (ioread32(&fw->status) & M00473_STATUS_BITMAP_FREEWHEEL_MODE_MSK) {
120 restart_fw:
121 cobalt_dbg(1, "lost lock\n");
122 iowrite32(M00233_CONTROL_BITMAP_ENABLE_MEASURE_MSK,
123 &vmr->control);
124 iowrite32(M00473_CTRL_BITMAP_ENABLE_MSK |
125 M00473_CTRL_BITMAP_FORCE_FREEWHEEL_MODE_MSK,
126 &fw->ctrl);
127 iowrite32(0, &cvi->control);
128 s->unstable_frame = true;
129 s->enable_freewheel = false;
130 s->enable_cvi = false;
131 }
132 done:
133 if (s->skip_first_frames) {
134 skip = true;
135 s->skip_first_frames--;
136 }
137 v4l2_get_timestamp(&cb->vb.timestamp);
138 /* TODO: the sequence number should be read from the FPGA so we
139 also know about dropped frames. */
140 cb->vb.sequence = s->sequence++;
141 vb2_buffer_done(&cb->vb.vb2_buf,
142 (skip || s->unstable_frame) ?
143 VB2_BUF_STATE_REQUEUEING : VB2_BUF_STATE_DONE);
144 }
145
cobalt_irq_handler(int irq,void * dev_id)146 irqreturn_t cobalt_irq_handler(int irq, void *dev_id)
147 {
148 struct cobalt *cobalt = (struct cobalt *)dev_id;
149 u32 dma_interrupt =
150 cobalt_read_bar0(cobalt, DMA_INTERRUPT_STATUS_REG) & 0xffff;
151 u32 mask = cobalt_read_bar1(cobalt, COBALT_SYS_STAT_MASK);
152 u32 edge = cobalt_read_bar1(cobalt, COBALT_SYS_STAT_EDGE);
153 int i;
154
155 /* Clear DMA interrupt */
156 cobalt_write_bar0(cobalt, DMA_INTERRUPT_STATUS_REG, dma_interrupt);
157 cobalt_write_bar1(cobalt, COBALT_SYS_STAT_MASK, mask & ~edge);
158 cobalt_write_bar1(cobalt, COBALT_SYS_STAT_EDGE, edge);
159
160 for (i = 0; i < COBALT_NUM_STREAMS; i++) {
161 struct cobalt_stream *s = &cobalt->streams[i];
162 unsigned dma_fifo_mask = s->dma_fifo_mask;
163
164 if (dma_interrupt & (1 << s->dma_channel)) {
165 cobalt->irq_dma[i]++;
166 /* Give fresh buffer to user and chain newly
167 * queued buffers */
168 cobalt_dma_stream_queue_handler(s);
169 if (!s->is_audio) {
170 edge &= ~dma_fifo_mask;
171 cobalt_write_bar1(cobalt, COBALT_SYS_STAT_MASK,
172 mask & ~edge);
173 }
174 }
175 if (s->is_audio)
176 continue;
177 if (edge & s->adv_irq_mask)
178 set_bit(COBALT_STREAM_FL_ADV_IRQ, &s->flags);
179 if ((edge & mask & dma_fifo_mask) && vb2_is_streaming(&s->q)) {
180 cobalt_info("full rx FIFO %d\n", i);
181 cobalt->irq_full_fifo++;
182 }
183 }
184
185 queue_work(cobalt->irq_work_queues, &cobalt->irq_work_queue);
186
187 if (edge & mask & (COBALT_SYSSTAT_VI0_INT1_MSK |
188 COBALT_SYSSTAT_VI1_INT1_MSK |
189 COBALT_SYSSTAT_VI2_INT1_MSK |
190 COBALT_SYSSTAT_VI3_INT1_MSK |
191 COBALT_SYSSTAT_VIHSMA_INT1_MSK |
192 COBALT_SYSSTAT_VOHSMA_INT1_MSK))
193 cobalt->irq_adv1++;
194 if (edge & mask & (COBALT_SYSSTAT_VI0_INT2_MSK |
195 COBALT_SYSSTAT_VI1_INT2_MSK |
196 COBALT_SYSSTAT_VI2_INT2_MSK |
197 COBALT_SYSSTAT_VI3_INT2_MSK |
198 COBALT_SYSSTAT_VIHSMA_INT2_MSK))
199 cobalt->irq_adv2++;
200 if (edge & mask & COBALT_SYSSTAT_VOHSMA_INT1_MSK)
201 cobalt->irq_advout++;
202 if (dma_interrupt)
203 cobalt->irq_dma_tot++;
204 if (!(edge & mask) && !dma_interrupt)
205 cobalt->irq_none++;
206 dma_interrupt = cobalt_read_bar0(cobalt, DMA_INTERRUPT_STATUS_REG);
207
208 return IRQ_HANDLED;
209 }
210
cobalt_irq_work_handler(struct work_struct * work)211 void cobalt_irq_work_handler(struct work_struct *work)
212 {
213 struct cobalt *cobalt =
214 container_of(work, struct cobalt, irq_work_queue);
215 int i;
216
217 for (i = 0; i < COBALT_NUM_NODES; i++) {
218 struct cobalt_stream *s = &cobalt->streams[i];
219
220 if (test_and_clear_bit(COBALT_STREAM_FL_ADV_IRQ, &s->flags)) {
221 u32 mask;
222
223 v4l2_subdev_call(cobalt->streams[i].sd, core,
224 interrupt_service_routine, 0, NULL);
225 mask = cobalt_read_bar1(cobalt, COBALT_SYS_STAT_MASK);
226 cobalt_write_bar1(cobalt, COBALT_SYS_STAT_MASK,
227 mask | s->adv_irq_mask);
228 }
229 }
230 }
231
cobalt_irq_log_status(struct cobalt * cobalt)232 void cobalt_irq_log_status(struct cobalt *cobalt)
233 {
234 u32 mask;
235 int i;
236
237 cobalt_info("irq: adv1=%u adv2=%u advout=%u none=%u full=%u\n",
238 cobalt->irq_adv1, cobalt->irq_adv2, cobalt->irq_advout,
239 cobalt->irq_none, cobalt->irq_full_fifo);
240 cobalt_info("irq: dma_tot=%u (", cobalt->irq_dma_tot);
241 for (i = 0; i < COBALT_NUM_STREAMS; i++)
242 pr_cont("%s%u", i ? "/" : "", cobalt->irq_dma[i]);
243 pr_cont(")\n");
244 cobalt->irq_dma_tot = cobalt->irq_adv1 = cobalt->irq_adv2 = 0;
245 cobalt->irq_advout = cobalt->irq_none = cobalt->irq_full_fifo = 0;
246 memset(cobalt->irq_dma, 0, sizeof(cobalt->irq_dma));
247
248 mask = cobalt_read_bar1(cobalt, COBALT_SYS_STAT_MASK);
249 cobalt_write_bar1(cobalt, COBALT_SYS_STAT_MASK,
250 mask |
251 COBALT_SYSSTAT_VI0_LOST_DATA_MSK |
252 COBALT_SYSSTAT_VI1_LOST_DATA_MSK |
253 COBALT_SYSSTAT_VI2_LOST_DATA_MSK |
254 COBALT_SYSSTAT_VI3_LOST_DATA_MSK |
255 COBALT_SYSSTAT_VIHSMA_LOST_DATA_MSK |
256 COBALT_SYSSTAT_VOHSMA_LOST_DATA_MSK |
257 COBALT_SYSSTAT_AUD_IN_LOST_DATA_MSK |
258 COBALT_SYSSTAT_AUD_OUT_LOST_DATA_MSK);
259 }
260