1/* 2 */ 3#include <linux/kernel.h> 4#include <linux/module.h> 5#include <linux/moduleparam.h> 6#include <linux/init.h> 7#include <linux/slab.h> 8 9#include "cx88.h" 10 11static unsigned int vbibufs = 4; 12module_param(vbibufs,int,0644); 13MODULE_PARM_DESC(vbibufs,"number of vbi buffers, range 2-32"); 14 15static unsigned int vbi_debug = 0; 16module_param(vbi_debug,int,0644); 17MODULE_PARM_DESC(vbi_debug,"enable debug messages [vbi]"); 18 19#define dprintk(level,fmt, arg...) if (vbi_debug >= level) \ 20 printk(KERN_DEBUG "%s: " fmt, dev->core->name , ## arg) 21 22/* ------------------------------------------------------------------ */ 23 24int cx8800_vbi_fmt (struct file *file, void *priv, 25 struct v4l2_format *f) 26{ 27 struct cx8800_fh *fh = priv; 28 struct cx8800_dev *dev = fh->dev; 29 30 f->fmt.vbi.samples_per_line = VBI_LINE_LENGTH; 31 f->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY; 32 f->fmt.vbi.offset = 244; 33 f->fmt.vbi.count[0] = VBI_LINE_COUNT; 34 f->fmt.vbi.count[1] = VBI_LINE_COUNT; 35 36 if (dev->core->tvnorm & V4L2_STD_525_60) { 37 /* ntsc */ 38 f->fmt.vbi.sampling_rate = 28636363; 39 f->fmt.vbi.start[0] = 10; 40 f->fmt.vbi.start[1] = 273; 41 42 } else if (dev->core->tvnorm & V4L2_STD_625_50) { 43 /* pal */ 44 f->fmt.vbi.sampling_rate = 35468950; 45 f->fmt.vbi.start[0] = 7 -1; 46 f->fmt.vbi.start[1] = 319 -1; 47 } 48 return 0; 49} 50 51static int cx8800_start_vbi_dma(struct cx8800_dev *dev, 52 struct cx88_dmaqueue *q, 53 struct cx88_buffer *buf) 54{ 55 struct cx88_core *core = dev->core; 56 57 /* setup fifo + format */ 58 cx88_sram_channel_setup(dev->core, &cx88_sram_channels[SRAM_CH24], 59 buf->vb.width, buf->risc.dma); 60 61 cx_write(MO_VBOS_CONTROL, ( (1 << 18) | // comb filter delay fixup 62 (1 << 15) | // enable vbi capture 63 (1 << 11) )); 64 65 /* reset counter */ 66 cx_write(MO_VBI_GPCNTRL, GP_COUNT_CONTROL_RESET); 67 q->count = 1; 68 69 /* enable irqs */ 70 cx_set(MO_PCI_INTMSK, core->pci_irqmask | 0x01); 71 cx_set(MO_VID_INTMSK, 0x0f0088); 72 73 /* enable capture */ 74 cx_set(VID_CAPTURE_CONTROL,0x18); 75 76 /* start dma */ 77 cx_set(MO_DEV_CNTRL2, (1<<5)); 78 cx_set(MO_VID_DMACNTRL, 0x88); 79 80 return 0; 81} 82 83int cx8800_stop_vbi_dma(struct cx8800_dev *dev) 84{ 85 struct cx88_core *core = dev->core; 86 87 /* stop dma */ 88 cx_clear(MO_VID_DMACNTRL, 0x88); 89 90 /* disable capture */ 91 cx_clear(VID_CAPTURE_CONTROL,0x18); 92 93 /* disable irqs */ 94 cx_clear(MO_PCI_INTMSK, 0x000001); 95 cx_clear(MO_VID_INTMSK, 0x0f0088); 96 return 0; 97} 98 99int cx8800_restart_vbi_queue(struct cx8800_dev *dev, 100 struct cx88_dmaqueue *q) 101{ 102 struct cx88_buffer *buf; 103 struct list_head *item; 104 105 if (list_empty(&q->active)) 106 return 0; 107 108 buf = list_entry(q->active.next, struct cx88_buffer, vb.queue); 109 dprintk(2,"restart_queue [%p/%d]: restart dma\n", 110 buf, buf->vb.i); 111 cx8800_start_vbi_dma(dev, q, buf); 112 list_for_each(item,&q->active) { 113 buf = list_entry(item, struct cx88_buffer, vb.queue); 114 buf->count = q->count++; 115 } 116 mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT); 117 return 0; 118} 119 120void cx8800_vbi_timeout(unsigned long data) 121{ 122 struct cx8800_dev *dev = (struct cx8800_dev*)data; 123 struct cx88_core *core = dev->core; 124 struct cx88_dmaqueue *q = &dev->vbiq; 125 struct cx88_buffer *buf; 126 unsigned long flags; 127 128 cx88_sram_channel_dump(dev->core, &cx88_sram_channels[SRAM_CH24]); 129 130 cx_clear(MO_VID_DMACNTRL, 0x88); 131 cx_clear(VID_CAPTURE_CONTROL, 0x18); 132 133 spin_lock_irqsave(&dev->slock,flags); 134 while (!list_empty(&q->active)) { 135 buf = list_entry(q->active.next, struct cx88_buffer, vb.queue); 136 list_del(&buf->vb.queue); 137 buf->vb.state = STATE_ERROR; 138 wake_up(&buf->vb.done); 139 printk("%s/0: [%p/%d] timeout - dma=0x%08lx\n", dev->core->name, 140 buf, buf->vb.i, (unsigned long)buf->risc.dma); 141 } 142 cx8800_restart_vbi_queue(dev,q); 143 spin_unlock_irqrestore(&dev->slock,flags); 144} 145 146/* ------------------------------------------------------------------ */ 147 148static int 149vbi_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size) 150{ 151 *size = VBI_LINE_COUNT * VBI_LINE_LENGTH * 2; 152 if (0 == *count) 153 *count = vbibufs; 154 if (*count < 2) 155 *count = 2; 156 if (*count > 32) 157 *count = 32; 158 return 0; 159} 160 161static int 162vbi_prepare(struct videobuf_queue *q, struct videobuf_buffer *vb, 163 enum v4l2_field field) 164{ 165 struct cx8800_fh *fh = q->priv_data; 166 struct cx8800_dev *dev = fh->dev; 167 struct cx88_buffer *buf = container_of(vb,struct cx88_buffer,vb); 168 unsigned int size; 169 int rc; 170 171 size = VBI_LINE_COUNT * VBI_LINE_LENGTH * 2; 172 if (0 != buf->vb.baddr && buf->vb.bsize < size) 173 return -EINVAL; 174 175 if (STATE_NEEDS_INIT == buf->vb.state) { 176 buf->vb.width = VBI_LINE_LENGTH; 177 buf->vb.height = VBI_LINE_COUNT; 178 buf->vb.size = size; 179 buf->vb.field = V4L2_FIELD_SEQ_TB; 180 181 if (0 != (rc = videobuf_iolock(q,&buf->vb,NULL))) 182 goto fail; 183 cx88_risc_buffer(dev->pci, &buf->risc, 184 buf->vb.dma.sglist, 185 0, buf->vb.width * buf->vb.height, 186 buf->vb.width, 0, 187 buf->vb.height); 188 } 189 buf->vb.state = STATE_PREPARED; 190 return 0; 191 192 fail: 193 cx88_free_buffer(q,buf); 194 return rc; 195} 196 197static void 198vbi_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb) 199{ 200 struct cx88_buffer *buf = container_of(vb,struct cx88_buffer,vb); 201 struct cx88_buffer *prev; 202 struct cx8800_fh *fh = vq->priv_data; 203 struct cx8800_dev *dev = fh->dev; 204 struct cx88_dmaqueue *q = &dev->vbiq; 205 206 /* add jump to stopper */ 207 buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | RISC_CNT_INC); 208 buf->risc.jmp[1] = cpu_to_le32(q->stopper.dma); 209 210 if (list_empty(&q->active)) { 211 list_add_tail(&buf->vb.queue,&q->active); 212 cx8800_start_vbi_dma(dev, q, buf); 213 buf->vb.state = STATE_ACTIVE; 214 buf->count = q->count++; 215 mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT); 216 dprintk(2,"[%p/%d] vbi_queue - first active\n", 217 buf, buf->vb.i); 218 219 } else { 220 prev = list_entry(q->active.prev, struct cx88_buffer, vb.queue); 221 list_add_tail(&buf->vb.queue,&q->active); 222 buf->vb.state = STATE_ACTIVE; 223 buf->count = q->count++; 224 prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma); 225 dprintk(2,"[%p/%d] buffer_queue - append to active\n", 226 buf, buf->vb.i); 227 } 228} 229 230static void vbi_release(struct videobuf_queue *q, struct videobuf_buffer *vb) 231{ 232 struct cx88_buffer *buf = container_of(vb,struct cx88_buffer,vb); 233 234 cx88_free_buffer(q,buf); 235} 236 237struct videobuf_queue_ops cx8800_vbi_qops = { 238 .buf_setup = vbi_setup, 239 .buf_prepare = vbi_prepare, 240 .buf_queue = vbi_queue, 241 .buf_release = vbi_release, 242}; 243 244/* ------------------------------------------------------------------ */ 245/* 246 * Local variables: 247 * c-basic-offset: 8 248 * End: 249 */ 250