Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
| 30 | #include "saa7134-reg.h" |
| 31 | #include "saa7134.h" |
| 32 | |
| 33 | /* ------------------------------------------------------------------ */ |
| 34 | |
| 35 | static unsigned int vbi_debug = 0; |
| 36 | module_param(vbi_debug, int, 0644); |
| 37 | MODULE_PARM_DESC(vbi_debug,"enable debug messages [vbi]"); |
| 38 | |
| 39 | static unsigned int vbibufs = 4; |
| 40 | module_param(vbibufs, int, 0444); |
| 41 | MODULE_PARM_DESC(vbibufs,"number of vbi buffers, range 2-32"); |
| 42 | |
| 43 | #define dprintk(fmt, arg...) if (vbi_debug) \ |
| 44 | printk(KERN_DEBUG "%s/vbi: " fmt, dev->name , ## arg) |
| 45 | |
| 46 | /* ------------------------------------------------------------------ */ |
| 47 | |
| 48 | #define VBI_LINE_COUNT 16 |
| 49 | #define VBI_LINE_LENGTH 2048 |
| 50 | #define VBI_SCALE 0x200 |
| 51 | |
| 52 | static void task_init(struct saa7134_dev *dev, struct saa7134_buf *buf, |
| 53 | int task) |
| 54 | { |
| 55 | struct saa7134_tvnorm *norm = dev->tvnorm; |
| 56 | |
| 57 | /* setup video scaler */ |
| 58 | saa_writeb(SAA7134_VBI_H_START1(task), norm->h_start & 0xff); |
| 59 | saa_writeb(SAA7134_VBI_H_START2(task), norm->h_start >> 8); |
| 60 | saa_writeb(SAA7134_VBI_H_STOP1(task), norm->h_stop & 0xff); |
| 61 | saa_writeb(SAA7134_VBI_H_STOP2(task), norm->h_stop >> 8); |
Michael Schimek | f246a81 | 2005-06-23 22:04:47 -0700 | [diff] [blame] | 62 | saa_writeb(SAA7134_VBI_V_START1(task), norm->vbi_v_start_0 & 0xff); |
| 63 | saa_writeb(SAA7134_VBI_V_START2(task), norm->vbi_v_start_0 >> 8); |
| 64 | saa_writeb(SAA7134_VBI_V_STOP1(task), norm->vbi_v_stop_0 & 0xff); |
| 65 | saa_writeb(SAA7134_VBI_V_STOP2(task), norm->vbi_v_stop_0 >> 8); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | |
| 67 | saa_writeb(SAA7134_VBI_H_SCALE_INC1(task), VBI_SCALE & 0xff); |
| 68 | saa_writeb(SAA7134_VBI_H_SCALE_INC2(task), VBI_SCALE >> 8); |
| 69 | saa_writeb(SAA7134_VBI_PHASE_OFFSET_LUMA(task), 0x00); |
| 70 | saa_writeb(SAA7134_VBI_PHASE_OFFSET_CHROMA(task), 0x00); |
| 71 | |
| 72 | saa_writeb(SAA7134_VBI_H_LEN1(task), buf->vb.width & 0xff); |
| 73 | saa_writeb(SAA7134_VBI_H_LEN2(task), buf->vb.width >> 8); |
| 74 | saa_writeb(SAA7134_VBI_V_LEN1(task), buf->vb.height & 0xff); |
| 75 | saa_writeb(SAA7134_VBI_V_LEN2(task), buf->vb.height >> 8); |
| 76 | |
| 77 | saa_andorb(SAA7134_DATA_PATH(task), 0xc0, 0x00); |
| 78 | } |
| 79 | |
| 80 | /* ------------------------------------------------------------------ */ |
| 81 | |
| 82 | static int buffer_activate(struct saa7134_dev *dev, |
| 83 | struct saa7134_buf *buf, |
| 84 | struct saa7134_buf *next) |
| 85 | { |
| 86 | unsigned long control,base; |
| 87 | |
| 88 | dprintk("buffer_activate [%p]\n",buf); |
| 89 | buf->vb.state = STATE_ACTIVE; |
| 90 | buf->top_seen = 0; |
| 91 | |
| 92 | task_init(dev,buf,TASK_A); |
| 93 | task_init(dev,buf,TASK_B); |
| 94 | saa_writeb(SAA7134_OFMT_DATA_A, 0x06); |
| 95 | saa_writeb(SAA7134_OFMT_DATA_B, 0x06); |
| 96 | |
| 97 | /* DMA: setup channel 2+3 (= VBI Task A+B) */ |
| 98 | base = saa7134_buffer_base(buf); |
| 99 | control = SAA7134_RS_CONTROL_BURST_16 | |
| 100 | SAA7134_RS_CONTROL_ME | |
| 101 | (buf->pt->dma >> 12); |
| 102 | saa_writel(SAA7134_RS_BA1(2),base); |
| 103 | saa_writel(SAA7134_RS_BA2(2),base + buf->vb.size/2); |
| 104 | saa_writel(SAA7134_RS_PITCH(2),buf->vb.width); |
| 105 | saa_writel(SAA7134_RS_CONTROL(2),control); |
| 106 | saa_writel(SAA7134_RS_BA1(3),base); |
| 107 | saa_writel(SAA7134_RS_BA2(3),base + buf->vb.size/2); |
| 108 | saa_writel(SAA7134_RS_PITCH(3),buf->vb.width); |
| 109 | saa_writel(SAA7134_RS_CONTROL(3),control); |
| 110 | |
| 111 | /* start DMA */ |
| 112 | saa7134_set_dmabits(dev); |
| 113 | mod_timer(&dev->vbi_q.timeout, jiffies+BUFFER_TIMEOUT); |
| 114 | |
| 115 | return 0; |
| 116 | } |
| 117 | |
| 118 | static int buffer_prepare(struct videobuf_queue *q, |
| 119 | struct videobuf_buffer *vb, |
| 120 | enum v4l2_field field) |
| 121 | { |
| 122 | struct saa7134_fh *fh = q->priv_data; |
| 123 | struct saa7134_dev *dev = fh->dev; |
| 124 | struct saa7134_buf *buf = container_of(vb,struct saa7134_buf,vb); |
| 125 | struct saa7134_tvnorm *norm = dev->tvnorm; |
| 126 | unsigned int lines, llength, size; |
| 127 | int err; |
| 128 | |
Michael Schimek | f246a81 | 2005-06-23 22:04:47 -0700 | [diff] [blame] | 129 | lines = norm->vbi_v_stop_0 - norm->vbi_v_start_0 +1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | if (lines > VBI_LINE_COUNT) |
| 131 | lines = VBI_LINE_COUNT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | llength = VBI_LINE_LENGTH; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | size = lines * llength * 2; |
| 134 | if (0 != buf->vb.baddr && buf->vb.bsize < size) |
| 135 | return -EINVAL; |
| 136 | |
| 137 | if (buf->vb.size != size) |
| 138 | saa7134_dma_free(dev,buf); |
| 139 | |
| 140 | if (STATE_NEEDS_INIT == buf->vb.state) { |
| 141 | buf->vb.width = llength; |
| 142 | buf->vb.height = lines; |
| 143 | buf->vb.size = size; |
| 144 | buf->pt = &fh->pt_vbi; |
| 145 | |
| 146 | err = videobuf_iolock(dev->pci,&buf->vb,NULL); |
| 147 | if (err) |
| 148 | goto oops; |
| 149 | err = saa7134_pgtable_build(dev->pci,buf->pt, |
| 150 | buf->vb.dma.sglist, |
| 151 | buf->vb.dma.sglen, |
| 152 | saa7134_buffer_startpage(buf)); |
| 153 | if (err) |
| 154 | goto oops; |
| 155 | } |
| 156 | buf->vb.state = STATE_PREPARED; |
| 157 | buf->activate = buffer_activate; |
| 158 | buf->vb.field = field; |
| 159 | return 0; |
| 160 | |
| 161 | oops: |
| 162 | saa7134_dma_free(dev,buf); |
| 163 | return err; |
| 164 | } |
| 165 | |
| 166 | static int |
| 167 | buffer_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size) |
| 168 | { |
| 169 | struct saa7134_fh *fh = q->priv_data; |
| 170 | struct saa7134_dev *dev = fh->dev; |
| 171 | int llength,lines; |
| 172 | |
Michael Schimek | f246a81 | 2005-06-23 22:04:47 -0700 | [diff] [blame] | 173 | lines = dev->tvnorm->vbi_v_stop_0 - dev->tvnorm->vbi_v_start_0 +1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | llength = VBI_LINE_LENGTH; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | *size = lines * llength * 2; |
| 176 | if (0 == *count) |
| 177 | *count = vbibufs; |
| 178 | *count = saa7134_buffer_count(*size,*count); |
| 179 | return 0; |
| 180 | } |
| 181 | |
| 182 | static void buffer_queue(struct videobuf_queue *q, struct videobuf_buffer *vb) |
| 183 | { |
| 184 | struct saa7134_fh *fh = q->priv_data; |
| 185 | struct saa7134_dev *dev = fh->dev; |
| 186 | struct saa7134_buf *buf = container_of(vb,struct saa7134_buf,vb); |
| 187 | |
| 188 | saa7134_buffer_queue(dev,&dev->vbi_q,buf); |
| 189 | } |
| 190 | |
| 191 | static void buffer_release(struct videobuf_queue *q, struct videobuf_buffer *vb) |
| 192 | { |
| 193 | struct saa7134_fh *fh = q->priv_data; |
| 194 | struct saa7134_dev *dev = fh->dev; |
| 195 | struct saa7134_buf *buf = container_of(vb,struct saa7134_buf,vb); |
| 196 | |
| 197 | saa7134_dma_free(dev,buf); |
| 198 | } |
| 199 | |
| 200 | struct videobuf_queue_ops saa7134_vbi_qops = { |
| 201 | .buf_setup = buffer_setup, |
| 202 | .buf_prepare = buffer_prepare, |
| 203 | .buf_queue = buffer_queue, |
| 204 | .buf_release = buffer_release, |
| 205 | }; |
| 206 | |
| 207 | /* ------------------------------------------------------------------ */ |
| 208 | |
| 209 | int saa7134_vbi_init1(struct saa7134_dev *dev) |
| 210 | { |
| 211 | INIT_LIST_HEAD(&dev->vbi_q.queue); |
| 212 | init_timer(&dev->vbi_q.timeout); |
| 213 | dev->vbi_q.timeout.function = saa7134_buffer_timeout; |
| 214 | dev->vbi_q.timeout.data = (unsigned long)(&dev->vbi_q); |
| 215 | dev->vbi_q.dev = dev; |
| 216 | |
| 217 | if (vbibufs < 2) |
| 218 | vbibufs = 2; |
| 219 | if (vbibufs > VIDEO_MAX_FRAME) |
| 220 | vbibufs = VIDEO_MAX_FRAME; |
| 221 | return 0; |
| 222 | } |
| 223 | |
| 224 | int saa7134_vbi_fini(struct saa7134_dev *dev) |
| 225 | { |
| 226 | /* nothing */ |
| 227 | return 0; |
| 228 | } |
| 229 | |
| 230 | void saa7134_irq_vbi_done(struct saa7134_dev *dev, unsigned long status) |
| 231 | { |
| 232 | spin_lock(&dev->slock); |
| 233 | if (dev->vbi_q.curr) { |
| 234 | dev->vbi_fieldcount++; |
| 235 | /* make sure we have seen both fields */ |
| 236 | if ((status & 0x10) == 0x00) { |
| 237 | dev->vbi_q.curr->top_seen = 1; |
| 238 | goto done; |
| 239 | } |
| 240 | if (!dev->vbi_q.curr->top_seen) |
| 241 | goto done; |
| 242 | |
| 243 | dev->vbi_q.curr->vb.field_count = dev->vbi_fieldcount; |
| 244 | saa7134_buffer_finish(dev,&dev->vbi_q,STATE_DONE); |
| 245 | } |
| 246 | saa7134_buffer_next(dev,&dev->vbi_q); |
| 247 | |
| 248 | done: |
| 249 | spin_unlock(&dev->slock); |
| 250 | } |
| 251 | |
| 252 | /* ----------------------------------------------------------- */ |
| 253 | /* |
| 254 | * Local variables: |
| 255 | * c-basic-offset: 8 |
| 256 | * End: |
| 257 | */ |