1 /* 2 * 3 * device driver for philips saa7134 based TV cards 4 * video4linux video interface 5 * 6 * (c) 2001,02 Gerd Knorr <kraxel@bytesex.org> [SuSE Labs] 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 21 */ 22 23 #include "saa7134.h" 24 #include "saa7134-reg.h" 25 26 #include <linux/init.h> 27 #include <linux/list.h> 28 #include <linux/module.h> 29 #include <linux/kernel.h> 30 #include <linux/delay.h> 31 32 /* ------------------------------------------------------------------ */ 33 34 static unsigned int ts_debug; 35 module_param(ts_debug, int, 0644); 36 MODULE_PARM_DESC(ts_debug,"enable debug messages [ts]"); 37 38 #define dprintk(fmt, arg...) if (ts_debug) \ 39 printk(KERN_DEBUG "%s/ts: " fmt, dev->name , ## arg) 40 41 /* ------------------------------------------------------------------ */ 42 static int buffer_activate(struct saa7134_dev *dev, 43 struct saa7134_buf *buf, 44 struct saa7134_buf *next) 45 { 46 47 dprintk("buffer_activate [%p]",buf); 48 buf->top_seen = 0; 49 50 if (!dev->ts_started) 51 dev->ts_field = V4L2_FIELD_TOP; 52 53 if (NULL == next) 54 next = buf; 55 if (V4L2_FIELD_TOP == dev->ts_field) { 56 dprintk("- [top] buf=%p next=%p\n",buf,next); 57 saa_writel(SAA7134_RS_BA1(5),saa7134_buffer_base(buf)); 58 saa_writel(SAA7134_RS_BA2(5),saa7134_buffer_base(next)); 59 dev->ts_field = V4L2_FIELD_BOTTOM; 60 } else { 61 dprintk("- [bottom] buf=%p next=%p\n",buf,next); 62 saa_writel(SAA7134_RS_BA1(5),saa7134_buffer_base(next)); 63 saa_writel(SAA7134_RS_BA2(5),saa7134_buffer_base(buf)); 64 dev->ts_field = V4L2_FIELD_TOP; 65 } 66 67 /* start DMA */ 68 saa7134_set_dmabits(dev); 69 70 mod_timer(&dev->ts_q.timeout, jiffies+TS_BUFFER_TIMEOUT); 71 72 if (!dev->ts_started) 73 saa7134_ts_start(dev); 74 75 return 0; 76 } 77 78 int saa7134_ts_buffer_init(struct vb2_buffer *vb2) 79 { 80 struct saa7134_dmaqueue *dmaq = vb2->vb2_queue->drv_priv; 81 struct saa7134_buf *buf = container_of(vb2, struct saa7134_buf, vb2); 82 83 dmaq->curr = NULL; 84 buf->activate = buffer_activate; 85 86 return 0; 87 } 88 EXPORT_SYMBOL_GPL(saa7134_ts_buffer_init); 89 90 int saa7134_ts_buffer_prepare(struct vb2_buffer *vb2) 91 { 92 struct saa7134_dmaqueue *dmaq = vb2->vb2_queue->drv_priv; 93 struct saa7134_dev *dev = dmaq->dev; 94 struct saa7134_buf *buf = container_of(vb2, struct saa7134_buf, vb2); 95 struct sg_table *dma = vb2_dma_sg_plane_desc(vb2, 0); 96 unsigned int lines, llength, size; 97 98 dprintk("buffer_prepare [%p]\n", buf); 99 100 llength = TS_PACKET_SIZE; 101 lines = dev->ts.nr_packets; 102 103 size = lines * llength; 104 if (vb2_plane_size(vb2, 0) < size) 105 return -EINVAL; 106 107 vb2_set_plane_payload(vb2, 0, size); 108 vb2->v4l2_buf.field = dev->field; 109 110 return saa7134_pgtable_build(dev->pci, &dmaq->pt, dma->sgl, dma->nents, 111 saa7134_buffer_startpage(buf)); 112 } 113 EXPORT_SYMBOL_GPL(saa7134_ts_buffer_prepare); 114 115 int saa7134_ts_queue_setup(struct vb2_queue *q, const struct v4l2_format *fmt, 116 unsigned int *nbuffers, unsigned int *nplanes, 117 unsigned int sizes[], void *alloc_ctxs[]) 118 { 119 struct saa7134_dmaqueue *dmaq = q->drv_priv; 120 struct saa7134_dev *dev = dmaq->dev; 121 int size = TS_PACKET_SIZE * dev->ts.nr_packets; 122 123 if (0 == *nbuffers) 124 *nbuffers = dev->ts.nr_bufs; 125 *nbuffers = saa7134_buffer_count(size, *nbuffers); 126 if (*nbuffers < 3) 127 *nbuffers = 3; 128 *nplanes = 1; 129 sizes[0] = size; 130 alloc_ctxs[0] = dev->alloc_ctx; 131 return 0; 132 } 133 EXPORT_SYMBOL_GPL(saa7134_ts_queue_setup); 134 135 int saa7134_ts_start_streaming(struct vb2_queue *vq, unsigned int count) 136 { 137 struct saa7134_dmaqueue *dmaq = vq->drv_priv; 138 struct saa7134_dev *dev = dmaq->dev; 139 140 /* 141 * Planar video capture and TS share the same DMA channel, 142 * so only one can be active at a time. 143 */ 144 if (vb2_is_busy(&dev->video_vbq) && dev->fmt->planar) { 145 struct saa7134_buf *buf, *tmp; 146 147 list_for_each_entry_safe(buf, tmp, &dmaq->queue, entry) { 148 list_del(&buf->entry); 149 vb2_buffer_done(&buf->vb2, VB2_BUF_STATE_QUEUED); 150 } 151 if (dmaq->curr) { 152 vb2_buffer_done(&dmaq->curr->vb2, VB2_BUF_STATE_QUEUED); 153 dmaq->curr = NULL; 154 } 155 return -EBUSY; 156 } 157 dmaq->seq_nr = 0; 158 return 0; 159 } 160 EXPORT_SYMBOL_GPL(saa7134_ts_start_streaming); 161 162 void saa7134_ts_stop_streaming(struct vb2_queue *vq) 163 { 164 struct saa7134_dmaqueue *dmaq = vq->drv_priv; 165 struct saa7134_dev *dev = dmaq->dev; 166 167 saa7134_ts_stop(dev); 168 saa7134_stop_streaming(dev, dmaq); 169 } 170 EXPORT_SYMBOL_GPL(saa7134_ts_stop_streaming); 171 172 struct vb2_ops saa7134_ts_qops = { 173 .queue_setup = saa7134_ts_queue_setup, 174 .buf_init = saa7134_ts_buffer_init, 175 .buf_prepare = saa7134_ts_buffer_prepare, 176 .buf_queue = saa7134_vb2_buffer_queue, 177 .wait_prepare = vb2_ops_wait_prepare, 178 .wait_finish = vb2_ops_wait_finish, 179 .stop_streaming = saa7134_ts_stop_streaming, 180 }; 181 EXPORT_SYMBOL_GPL(saa7134_ts_qops); 182 183 /* ----------------------------------------------------------- */ 184 /* exported stuff */ 185 186 static unsigned int tsbufs = 8; 187 module_param(tsbufs, int, 0444); 188 MODULE_PARM_DESC(tsbufs, "number of ts buffers for read/write IO, range 2-32"); 189 190 static unsigned int ts_nr_packets = 64; 191 module_param(ts_nr_packets, int, 0444); 192 MODULE_PARM_DESC(ts_nr_packets,"size of a ts buffers (in ts packets)"); 193 194 int saa7134_ts_init_hw(struct saa7134_dev *dev) 195 { 196 /* deactivate TS softreset */ 197 saa_writeb(SAA7134_TS_SERIAL1, 0x00); 198 /* TSSOP high active, TSVAL high active, TSLOCK ignored */ 199 saa_writeb(SAA7134_TS_PARALLEL, 0x6c); 200 saa_writeb(SAA7134_TS_PARALLEL_SERIAL, (TS_PACKET_SIZE-1)); 201 saa_writeb(SAA7134_TS_DMA0, ((dev->ts.nr_packets-1)&0xff)); 202 saa_writeb(SAA7134_TS_DMA1, (((dev->ts.nr_packets-1)>>8)&0xff)); 203 /* TSNOPIT=0, TSCOLAP=0 */ 204 saa_writeb(SAA7134_TS_DMA2, 205 ((((dev->ts.nr_packets-1)>>16)&0x3f) | 0x00)); 206 207 return 0; 208 } 209 210 int saa7134_ts_init1(struct saa7134_dev *dev) 211 { 212 /* sanitycheck insmod options */ 213 if (tsbufs < 2) 214 tsbufs = 2; 215 if (tsbufs > VIDEO_MAX_FRAME) 216 tsbufs = VIDEO_MAX_FRAME; 217 if (ts_nr_packets < 4) 218 ts_nr_packets = 4; 219 if (ts_nr_packets > 312) 220 ts_nr_packets = 312; 221 dev->ts.nr_bufs = tsbufs; 222 dev->ts.nr_packets = ts_nr_packets; 223 224 INIT_LIST_HEAD(&dev->ts_q.queue); 225 init_timer(&dev->ts_q.timeout); 226 dev->ts_q.timeout.function = saa7134_buffer_timeout; 227 dev->ts_q.timeout.data = (unsigned long)(&dev->ts_q); 228 dev->ts_q.dev = dev; 229 dev->ts_q.need_two = 1; 230 dev->ts_started = 0; 231 saa7134_pgtable_alloc(dev->pci, &dev->ts_q.pt); 232 233 /* init TS hw */ 234 saa7134_ts_init_hw(dev); 235 236 return 0; 237 } 238 239 /* Function for stop TS */ 240 int saa7134_ts_stop(struct saa7134_dev *dev) 241 { 242 dprintk("TS stop\n"); 243 244 if (!dev->ts_started) 245 return 0; 246 247 /* Stop TS stream */ 248 switch (saa7134_boards[dev->board].ts_type) { 249 case SAA7134_MPEG_TS_PARALLEL: 250 saa_writeb(SAA7134_TS_PARALLEL, 0x6c); 251 dev->ts_started = 0; 252 break; 253 case SAA7134_MPEG_TS_SERIAL: 254 saa_writeb(SAA7134_TS_SERIAL0, 0x40); 255 dev->ts_started = 0; 256 break; 257 } 258 return 0; 259 } 260 261 /* Function for start TS */ 262 int saa7134_ts_start(struct saa7134_dev *dev) 263 { 264 dprintk("TS start\n"); 265 266 if (WARN_ON(dev->ts_started)) 267 return 0; 268 269 /* dma: setup channel 5 (= TS) */ 270 saa_writeb(SAA7134_TS_DMA0, (dev->ts.nr_packets - 1) & 0xff); 271 saa_writeb(SAA7134_TS_DMA1, 272 ((dev->ts.nr_packets - 1) >> 8) & 0xff); 273 /* TSNOPIT=0, TSCOLAP=0 */ 274 saa_writeb(SAA7134_TS_DMA2, 275 (((dev->ts.nr_packets - 1) >> 16) & 0x3f) | 0x00); 276 saa_writel(SAA7134_RS_PITCH(5), TS_PACKET_SIZE); 277 saa_writel(SAA7134_RS_CONTROL(5), SAA7134_RS_CONTROL_BURST_16 | 278 SAA7134_RS_CONTROL_ME | 279 (dev->ts_q.pt.dma >> 12)); 280 281 /* reset hardware TS buffers */ 282 saa_writeb(SAA7134_TS_SERIAL1, 0x00); 283 saa_writeb(SAA7134_TS_SERIAL1, 0x03); 284 saa_writeb(SAA7134_TS_SERIAL1, 0x00); 285 saa_writeb(SAA7134_TS_SERIAL1, 0x01); 286 287 /* TS clock non-inverted */ 288 saa_writeb(SAA7134_TS_SERIAL1, 0x00); 289 290 /* Start TS stream */ 291 switch (saa7134_boards[dev->board].ts_type) { 292 case SAA7134_MPEG_TS_PARALLEL: 293 saa_writeb(SAA7134_TS_SERIAL0, 0x40); 294 saa_writeb(SAA7134_TS_PARALLEL, 0xec | 295 (saa7134_boards[dev->board].ts_force_val << 4)); 296 break; 297 case SAA7134_MPEG_TS_SERIAL: 298 saa_writeb(SAA7134_TS_SERIAL0, 0xd8); 299 saa_writeb(SAA7134_TS_PARALLEL, 0x6c | 300 (saa7134_boards[dev->board].ts_force_val << 4)); 301 saa_writeb(SAA7134_TS_PARALLEL_SERIAL, 0xbc); 302 saa_writeb(SAA7134_TS_SERIAL1, 0x02); 303 break; 304 } 305 306 dev->ts_started = 1; 307 308 return 0; 309 } 310 311 int saa7134_ts_fini(struct saa7134_dev *dev) 312 { 313 saa7134_pgtable_free(dev->pci, &dev->ts_q.pt); 314 return 0; 315 } 316 317 void saa7134_irq_ts_done(struct saa7134_dev *dev, unsigned long status) 318 { 319 enum v4l2_field field; 320 321 spin_lock(&dev->slock); 322 if (dev->ts_q.curr) { 323 field = dev->ts_field; 324 if (field != V4L2_FIELD_TOP) { 325 if ((status & 0x100000) != 0x000000) 326 goto done; 327 } else { 328 if ((status & 0x100000) != 0x100000) 329 goto done; 330 } 331 saa7134_buffer_finish(dev, &dev->ts_q, VB2_BUF_STATE_DONE); 332 } 333 saa7134_buffer_next(dev,&dev->ts_q); 334 335 done: 336 spin_unlock(&dev->slock); 337 } 338