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 <linux/init.h> 24#include <linux/list.h> 25#include <linux/module.h> 26#include <linux/moduleparam.h> 27#include <linux/kernel.h> 28#include <linux/slab.h> 29#include <linux/delay.h> 30 31#include "saa7134-reg.h" 32#include "saa7134.h" 33 34/* ------------------------------------------------------------------ */ 35 36static unsigned int ts_debug = 0; 37module_param(ts_debug, int, 0644); 38MODULE_PARM_DESC(ts_debug,"enable debug messages [ts]"); 39 40#define dprintk(fmt, arg...) if (ts_debug) \ 41 printk(KERN_DEBUG "%s/ts: " fmt, dev->name , ## arg) 42 43/* ------------------------------------------------------------------ */ 44 45static int buffer_activate(struct saa7134_dev *dev, 46 struct saa7134_buf *buf, 47 struct saa7134_buf *next) 48{ 49 50 dprintk("buffer_activate [%p]",buf); 51 buf->vb.state = STATE_ACTIVE; 52 buf->top_seen = 0; 53 54 if (NULL == next) 55 next = buf; 56 if (V4L2_FIELD_TOP == buf->vb.field) { 57 dprintk("- [top] buf=%p next=%p\n",buf,next); 58 saa_writel(SAA7134_RS_BA1(5),saa7134_buffer_base(buf)); 59 saa_writel(SAA7134_RS_BA2(5),saa7134_buffer_base(next)); 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 } 65 66 /* start DMA */ 67 saa7134_set_dmabits(dev); 68 69 mod_timer(&dev->ts_q.timeout, jiffies+BUFFER_TIMEOUT); 70 return 0; 71} 72 73static int buffer_prepare(struct videobuf_queue *q, struct videobuf_buffer *vb, 74 enum v4l2_field field) 75{ 76 struct saa7134_dev *dev = q->priv_data; 77 struct saa7134_buf *buf = container_of(vb,struct saa7134_buf,vb); 78 unsigned int lines, llength, size; 79 u32 control; 80 int err; 81 82 dprintk("buffer_prepare [%p,%s]\n",buf,v4l2_field_names[field]); 83 84 llength = TS_PACKET_SIZE; 85 lines = dev->ts.nr_packets; 86 87 size = lines * llength; 88 if (0 != buf->vb.baddr && buf->vb.bsize < size) 89 return -EINVAL; 90 91 if (buf->vb.size != size) { 92 saa7134_dma_free(q,buf); 93 } 94 95 if (STATE_NEEDS_INIT == buf->vb.state) { 96 buf->vb.width = llength; 97 buf->vb.height = lines; 98 buf->vb.size = size; 99 buf->pt = &dev->ts.pt_ts; 100 101 err = videobuf_iolock(q,&buf->vb,NULL); 102 if (err) 103 goto oops; 104 err = saa7134_pgtable_build(dev->pci,buf->pt, 105 buf->vb.dma.sglist, 106 buf->vb.dma.sglen, 107 saa7134_buffer_startpage(buf)); 108 if (err) 109 goto oops; 110 } 111 112 /* dma: setup channel 5 (= TS) */ 113 control = SAA7134_RS_CONTROL_BURST_16 | 114 SAA7134_RS_CONTROL_ME | 115 (buf->pt->dma >> 12); 116 117 saa_writeb(SAA7134_TS_DMA0, ((lines-1)&0xff)); 118 saa_writeb(SAA7134_TS_DMA1, (((lines-1)>>8)&0xff)); 119 saa_writeb(SAA7134_TS_DMA2, ((((lines-1)>>16)&0x3f) | 0x00)); /* TSNOPIT=0, TSCOLAP=0 */ 120 saa_writel(SAA7134_RS_PITCH(5),TS_PACKET_SIZE); 121 saa_writel(SAA7134_RS_CONTROL(5),control); 122 123 buf->vb.state = STATE_PREPARED; 124 buf->activate = buffer_activate; 125 buf->vb.field = field; 126 return 0; 127 128 oops: 129 saa7134_dma_free(q,buf); 130 return err; 131} 132 133static int 134buffer_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size) 135{ 136 struct saa7134_dev *dev = q->priv_data; 137 138 *size = TS_PACKET_SIZE * dev->ts.nr_packets; 139 if (0 == *count) 140 *count = dev->ts.nr_bufs; 141 *count = saa7134_buffer_count(*size,*count); 142 return 0; 143} 144 145static void buffer_queue(struct videobuf_queue *q, struct videobuf_buffer *vb) 146{ 147 struct saa7134_dev *dev = q->priv_data; 148 struct saa7134_buf *buf = container_of(vb,struct saa7134_buf,vb); 149 150 saa7134_buffer_queue(dev,&dev->ts_q,buf); 151} 152 153static void buffer_release(struct videobuf_queue *q, struct videobuf_buffer *vb) 154{ 155 struct saa7134_buf *buf = container_of(vb,struct saa7134_buf,vb); 156 157 saa7134_dma_free(q,buf); 158} 159 160struct videobuf_queue_ops saa7134_ts_qops = { 161 .buf_setup = buffer_setup, 162 .buf_prepare = buffer_prepare, 163 .buf_queue = buffer_queue, 164 .buf_release = buffer_release, 165}; 166EXPORT_SYMBOL_GPL(saa7134_ts_qops); 167 168/* ----------------------------------------------------------- */ 169/* exported stuff */ 170 171static unsigned int tsbufs = 8; 172module_param(tsbufs, int, 0444); 173MODULE_PARM_DESC(tsbufs,"number of ts buffers, range 2-32"); 174 175static unsigned int ts_nr_packets = 64; 176module_param(ts_nr_packets, int, 0444); 177MODULE_PARM_DESC(ts_nr_packets,"size of a ts buffers (in ts packets)"); 178 179int saa7134_ts_init1(struct saa7134_dev *dev) 180{ 181 /* sanitycheck insmod options */ 182 if (tsbufs < 2) 183 tsbufs = 2; 184 if (tsbufs > VIDEO_MAX_FRAME) 185 tsbufs = VIDEO_MAX_FRAME; 186 if (ts_nr_packets < 4) 187 ts_nr_packets = 4; 188 if (ts_nr_packets > 312) 189 ts_nr_packets = 312; 190 dev->ts.nr_bufs = tsbufs; 191 dev->ts.nr_packets = ts_nr_packets; 192 193 INIT_LIST_HEAD(&dev->ts_q.queue); 194 init_timer(&dev->ts_q.timeout); 195 dev->ts_q.timeout.function = saa7134_buffer_timeout; 196 dev->ts_q.timeout.data = (unsigned long)(&dev->ts_q); 197 dev->ts_q.dev = dev; 198 dev->ts_q.need_two = 1; 199 saa7134_pgtable_alloc(dev->pci,&dev->ts.pt_ts); 200 201 /* init TS hw */ 202 saa_writeb(SAA7134_TS_SERIAL1, 0x00); /* deactivate TS softreset */ 203 saa_writeb(SAA7134_TS_PARALLEL, 0xec); /* TSSOP high active, TSVAL high active, TSLOCK ignored */ 204 saa_writeb(SAA7134_TS_PARALLEL_SERIAL, (TS_PACKET_SIZE-1)); 205 saa_writeb(SAA7134_TS_DMA0, ((dev->ts.nr_packets-1)&0xff)); 206 saa_writeb(SAA7134_TS_DMA1, (((dev->ts.nr_packets-1)>>8)&0xff)); 207 saa_writeb(SAA7134_TS_DMA2, ((((dev->ts.nr_packets-1)>>16)&0x3f) | 0x00)); /* TSNOPIT=0, TSCOLAP=0 */ 208 209 return 0; 210} 211 212int saa7134_ts_fini(struct saa7134_dev *dev) 213{ 214 saa7134_pgtable_free(dev->pci,&dev->ts.pt_ts); 215 return 0; 216} 217 218 219void saa7134_irq_ts_done(struct saa7134_dev *dev, unsigned long status) 220{ 221 enum v4l2_field field; 222 223 spin_lock(&dev->slock); 224 if (dev->ts_q.curr) { 225 field = dev->ts_q.curr->vb.field; 226 if (field == V4L2_FIELD_TOP) { 227 if ((status & 0x100000) != 0x000000) 228 goto done; 229 } else { 230 if ((status & 0x100000) != 0x100000) 231 goto done; 232 } 233 saa7134_buffer_finish(dev,&dev->ts_q,STATE_DONE); 234 } 235 saa7134_buffer_next(dev,&dev->ts_q); 236 237 done: 238 spin_unlock(&dev->slock); 239} 240 241/* ----------------------------------------------------------- */ 242/* 243 * Local variables: 244 * c-basic-offset: 8 245 * End: 246 */ 247