Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 1 | /* |
| 2 | cx231xx_vbi.c - driver for Conexant Cx23100/101/102 USB video capture devices |
| 3 | |
| 4 | Copyright (C) 2008 <srinivasa.deevi at conexant dot com> |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 5 | Based on cx88 driver |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 2 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program; if not, write to the Free Software |
| 19 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 20 | */ |
| 21 | |
| 22 | #include <linux/init.h> |
| 23 | #include <linux/list.h> |
| 24 | #include <linux/module.h> |
| 25 | #include <linux/kernel.h> |
| 26 | #include <linux/bitmap.h> |
| 27 | #include <linux/usb.h> |
| 28 | #include <linux/i2c.h> |
| 29 | #include <linux/version.h> |
| 30 | #include <linux/mm.h> |
| 31 | #include <linux/mutex.h> |
| 32 | |
| 33 | #include <media/v4l2-common.h> |
| 34 | #include <media/v4l2-ioctl.h> |
| 35 | #include <media/v4l2-chip-ident.h> |
| 36 | #include <media/msp3400.h> |
| 37 | #include <media/tuner.h> |
| 38 | |
| 39 | #include "cx231xx.h" |
| 40 | #include "cx231xx-vbi.h" |
| 41 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 42 | static inline void print_err_status(struct cx231xx *dev, int packet, int status) |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 43 | { |
| 44 | char *errmsg = "Unknown"; |
| 45 | |
| 46 | switch (status) { |
| 47 | case -ENOENT: |
| 48 | errmsg = "unlinked synchronuously"; |
| 49 | break; |
| 50 | case -ECONNRESET: |
| 51 | errmsg = "unlinked asynchronuously"; |
| 52 | break; |
| 53 | case -ENOSR: |
| 54 | errmsg = "Buffer error (overrun)"; |
| 55 | break; |
| 56 | case -EPIPE: |
| 57 | errmsg = "Stalled (device not responding)"; |
| 58 | break; |
| 59 | case -EOVERFLOW: |
| 60 | errmsg = "Babble (bad cable?)"; |
| 61 | break; |
| 62 | case -EPROTO: |
| 63 | errmsg = "Bit-stuff error (bad cable?)"; |
| 64 | break; |
| 65 | case -EILSEQ: |
| 66 | errmsg = "CRC/Timeout (could be anything)"; |
| 67 | break; |
| 68 | case -ETIME: |
| 69 | errmsg = "Device does not respond"; |
| 70 | break; |
| 71 | } |
| 72 | if (packet < 0) { |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 73 | cx231xx_err(DRIVER_NAME "URB status %d [%s].\n", status, |
| 74 | errmsg); |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 75 | } else { |
| 76 | cx231xx_err(DRIVER_NAME "URB packet %d, status %d [%s].\n", |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 77 | packet, status, errmsg); |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 78 | } |
| 79 | } |
| 80 | |
| 81 | /* |
| 82 | * Controls the isoc copy of each urb packet |
| 83 | */ |
| 84 | static inline int cx231xx_isoc_vbi_copy(struct cx231xx *dev, struct urb *urb) |
| 85 | { |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 86 | struct cx231xx_buffer *buf; |
| 87 | struct cx231xx_dmaqueue *dma_q = urb->context; |
| 88 | int rc = 1; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 89 | unsigned char *p_buffer; |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 90 | u32 bytes_parsed = 0, buffer_size = 0; |
| 91 | u8 sav_eav = 0; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 92 | |
| 93 | if (!dev) |
| 94 | return 0; |
| 95 | |
| 96 | if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED)) |
| 97 | return 0; |
| 98 | |
| 99 | if (urb->status < 0) { |
| 100 | print_err_status(dev, -1, urb->status); |
| 101 | if (urb->status == -ENOENT) |
| 102 | return 0; |
| 103 | } |
| 104 | |
| 105 | buf = dev->vbi_mode.isoc_ctl.buf; |
| 106 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 107 | /* get buffer pointer and length */ |
| 108 | p_buffer = urb->transfer_buffer; |
| 109 | buffer_size = urb->actual_length; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 110 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 111 | if (buffer_size > 0) { |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 112 | bytes_parsed = 0; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 113 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 114 | if (dma_q->is_partial_line) { |
Mauro Carvalho Chehab | cde4362 | 2009-03-03 13:31:36 -0300 | [diff] [blame^] | 115 | /* Handle the case where we were working on a partial |
| 116 | line */ |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 117 | sav_eav = dma_q->last_sav; |
| 118 | } else { |
Mauro Carvalho Chehab | cde4362 | 2009-03-03 13:31:36 -0300 | [diff] [blame^] | 119 | /* Check for a SAV/EAV overlapping the |
| 120 | buffer boundary */ |
| 121 | |
| 122 | sav_eav = cx231xx_find_boundary_SAV_EAV(p_buffer, |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 123 | dma_q->partial_buf, |
| 124 | &bytes_parsed); |
| 125 | } |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 126 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 127 | sav_eav &= 0xF0; |
Mauro Carvalho Chehab | cde4362 | 2009-03-03 13:31:36 -0300 | [diff] [blame^] | 128 | /* Get the first line if we have some portion of an SAV/EAV from |
| 129 | the last buffer or a partial line */ |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 130 | if (sav_eav) { |
Mauro Carvalho Chehab | cde4362 | 2009-03-03 13:31:36 -0300 | [diff] [blame^] | 131 | bytes_parsed += cx231xx_get_vbi_line(dev, dma_q, |
| 132 | sav_eav, /* SAV/EAV */ |
| 133 | p_buffer + bytes_parsed, /* p_buffer */ |
| 134 | buffer_size - bytes_parsed); /* buffer size */ |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 135 | } |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 136 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 137 | /* Now parse data that is completely in this buffer */ |
| 138 | dma_q->is_partial_line = 0; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 139 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 140 | while (bytes_parsed < buffer_size) { |
| 141 | u32 bytes_used = 0; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 142 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 143 | sav_eav = cx231xx_find_next_SAV_EAV(p_buffer + bytes_parsed, /* p_buffer */ |
Mauro Carvalho Chehab | cde4362 | 2009-03-03 13:31:36 -0300 | [diff] [blame^] | 144 | buffer_size - bytes_parsed, /* buffer size */ |
| 145 | &bytes_used); /* Receives bytes used to get SAV/EAV */ |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 146 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 147 | bytes_parsed += bytes_used; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 148 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 149 | sav_eav &= 0xF0; |
| 150 | if (sav_eav && (bytes_parsed < buffer_size)) { |
Mauro Carvalho Chehab | cde4362 | 2009-03-03 13:31:36 -0300 | [diff] [blame^] | 151 | bytes_parsed += cx231xx_get_vbi_line(dev, |
| 152 | dma_q, sav_eav, /* SAV/EAV */ |
| 153 | p_buffer + bytes_parsed, /* p_buffer */ |
| 154 | buffer_size - bytes_parsed); /* buffer size */ |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 155 | } |
| 156 | } |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 157 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 158 | /* Save the last four bytes of the buffer so we can check the buffer boundary |
| 159 | condition next time */ |
| 160 | memcpy(dma_q->partial_buf, p_buffer + buffer_size - 4, 4); |
| 161 | bytes_parsed = 0; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 162 | } |
| 163 | |
| 164 | return rc; |
| 165 | } |
| 166 | |
| 167 | /* ------------------------------------------------------------------ |
| 168 | Vbi buf operations |
| 169 | ------------------------------------------------------------------*/ |
| 170 | |
| 171 | static int |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 172 | vbi_buffer_setup(struct videobuf_queue *vq, unsigned int *count, |
| 173 | unsigned int *size) |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 174 | { |
| 175 | struct cx231xx_fh *fh = vq->priv_data; |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 176 | struct cx231xx *dev = fh->dev; |
| 177 | u32 height = 0; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 178 | |
| 179 | height = ((dev->norm & V4L2_STD_625_50) ? |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 180 | PAL_VBI_LINES : NTSC_VBI_LINES); |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 181 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 182 | *size = (dev->width * height * 2); |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 183 | if (0 == *count) |
| 184 | *count = CX231XX_DEF_VBI_BUF; |
| 185 | |
| 186 | if (*count < CX231XX_MIN_BUF) |
| 187 | *count = CX231XX_MIN_BUF; |
| 188 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 189 | /* call VBI setup if required */ |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 190 | /* cx231xx_i2c_call_clients(&dev->i2c_bus[1], VIDIOC_S_FREQUENCY, &f); |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 191 | */ |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 192 | |
| 193 | return 0; |
| 194 | } |
| 195 | |
| 196 | /* This is called *without* dev->slock held; please keep it that way */ |
| 197 | static void free_buffer(struct videobuf_queue *vq, struct cx231xx_buffer *buf) |
| 198 | { |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 199 | struct cx231xx_fh *fh = vq->priv_data; |
| 200 | struct cx231xx *dev = fh->dev; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 201 | unsigned long flags = 0; |
| 202 | if (in_interrupt()) |
| 203 | BUG(); |
| 204 | |
| 205 | /* We used to wait for the buffer to finish here, but this didn't work |
| 206 | because, as we were keeping the state as VIDEOBUF_QUEUED, |
| 207 | videobuf_queue_cancel marked it as finished for us. |
| 208 | (Also, it could wedge forever if the hardware was misconfigured.) |
| 209 | |
| 210 | This should be safe; by the time we get here, the buffer isn't |
| 211 | queued anymore. If we ever start marking the buffers as |
| 212 | VIDEOBUF_ACTIVE, it won't be, though. |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 213 | */ |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 214 | spin_lock_irqsave(&dev->vbi_mode.slock, flags); |
| 215 | if (dev->vbi_mode.isoc_ctl.buf == buf) |
| 216 | dev->vbi_mode.isoc_ctl.buf = NULL; |
| 217 | spin_unlock_irqrestore(&dev->vbi_mode.slock, flags); |
| 218 | |
| 219 | videobuf_vmalloc_free(&buf->vb); |
| 220 | buf->vb.state = VIDEOBUF_NEEDS_INIT; |
| 221 | } |
| 222 | |
| 223 | static int |
| 224 | vbi_buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb, |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 225 | enum v4l2_field field) |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 226 | { |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 227 | struct cx231xx_fh *fh = vq->priv_data; |
| 228 | struct cx231xx_buffer *buf = |
| 229 | container_of(vb, struct cx231xx_buffer, vb); |
| 230 | struct cx231xx *dev = fh->dev; |
| 231 | int rc = 0, urb_init = 0; |
| 232 | u32 height = 0; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 233 | |
| 234 | height = ((dev->norm & V4L2_STD_625_50) ? |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 235 | PAL_VBI_LINES : NTSC_VBI_LINES); |
| 236 | buf->vb.size = ((dev->width << 1) * height); |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 237 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 238 | if (0 != buf->vb.baddr && buf->vb.bsize < buf->vb.size) |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 239 | return -EINVAL; |
| 240 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 241 | buf->vb.width = dev->width; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 242 | buf->vb.height = height; |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 243 | buf->vb.field = field; |
| 244 | buf->vb.field = V4L2_FIELD_SEQ_TB; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 245 | |
| 246 | if (VIDEOBUF_NEEDS_INIT == buf->vb.state) { |
| 247 | rc = videobuf_iolock(vq, &buf->vb, NULL); |
| 248 | if (rc < 0) |
| 249 | goto fail; |
| 250 | } |
| 251 | |
| 252 | if (!dev->vbi_mode.isoc_ctl.num_bufs) |
| 253 | urb_init = 1; |
| 254 | |
| 255 | if (urb_init) { |
| 256 | rc = cx231xx_init_vbi_isoc(dev, CX231XX_NUM_VBI_PACKETS, |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 257 | CX231XX_NUM_VBI_BUFS, |
| 258 | dev->vbi_mode.alt_max_pkt_size[0], |
| 259 | cx231xx_isoc_vbi_copy); |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 260 | if (rc < 0) |
| 261 | goto fail; |
| 262 | } |
| 263 | |
| 264 | buf->vb.state = VIDEOBUF_PREPARED; |
| 265 | return 0; |
| 266 | |
Mauro Carvalho Chehab | cde4362 | 2009-03-03 13:31:36 -0300 | [diff] [blame^] | 267 | fail: |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 268 | free_buffer(vq, buf); |
| 269 | return rc; |
| 270 | } |
| 271 | |
| 272 | static void |
| 273 | vbi_buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb) |
| 274 | { |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 275 | struct cx231xx_buffer *buf = |
| 276 | container_of(vb, struct cx231xx_buffer, vb); |
| 277 | struct cx231xx_fh *fh = vq->priv_data; |
| 278 | struct cx231xx *dev = fh->dev; |
| 279 | struct cx231xx_dmaqueue *vidq = &dev->vbi_mode.vidq; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 280 | |
| 281 | buf->vb.state = VIDEOBUF_QUEUED; |
| 282 | list_add_tail(&buf->vb.queue, &vidq->active); |
| 283 | |
| 284 | } |
| 285 | |
| 286 | static void vbi_buffer_release(struct videobuf_queue *vq, |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 287 | struct videobuf_buffer *vb) |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 288 | { |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 289 | struct cx231xx_buffer *buf = |
| 290 | container_of(vb, struct cx231xx_buffer, vb); |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 291 | |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 292 | |
| 293 | free_buffer(vq, buf); |
| 294 | } |
| 295 | |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 296 | struct videobuf_queue_ops cx231xx_vbi_qops = { |
Mauro Carvalho Chehab | cde4362 | 2009-03-03 13:31:36 -0300 | [diff] [blame^] | 297 | .buf_setup = vbi_buffer_setup, |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 298 | .buf_prepare = vbi_buffer_prepare, |
Mauro Carvalho Chehab | cde4362 | 2009-03-03 13:31:36 -0300 | [diff] [blame^] | 299 | .buf_queue = vbi_buffer_queue, |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 300 | .buf_release = vbi_buffer_release, |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 301 | }; |
| 302 | |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 303 | /* ------------------------------------------------------------------ |
| 304 | URB control |
| 305 | ------------------------------------------------------------------*/ |
| 306 | |
| 307 | /* |
| 308 | * IRQ callback, called by URB callback |
| 309 | */ |
| 310 | static void cx231xx_irq_vbi_callback(struct urb *urb) |
| 311 | { |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 312 | struct cx231xx_dmaqueue *dma_q = urb->context; |
| 313 | struct cx231xx_video_mode *vmode = |
| 314 | container_of(dma_q, struct cx231xx_video_mode, vidq); |
| 315 | struct cx231xx *dev = container_of(vmode, struct cx231xx, vbi_mode); |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 316 | int rc; |
| 317 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 318 | switch (urb->status) { |
| 319 | case 0: /* success */ |
| 320 | case -ETIMEDOUT: /* NAK */ |
| 321 | break; |
| 322 | case -ECONNRESET: /* kill */ |
| 323 | case -ENOENT: |
| 324 | case -ESHUTDOWN: |
| 325 | return; |
| 326 | default: /* error */ |
| 327 | cx231xx_err(DRIVER_NAME "urb completition error %d.\n", |
| 328 | urb->status); |
| 329 | break; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 330 | } |
| 331 | |
| 332 | /* Copy data from URB */ |
| 333 | spin_lock(&dev->vbi_mode.slock); |
| 334 | rc = dev->vbi_mode.isoc_ctl.isoc_copy(dev, urb); |
| 335 | spin_unlock(&dev->vbi_mode.slock); |
| 336 | |
| 337 | /* Reset status */ |
| 338 | urb->status = 0; |
| 339 | |
| 340 | urb->status = usb_submit_urb(urb, GFP_ATOMIC); |
| 341 | if (urb->status) { |
| 342 | cx231xx_err(DRIVER_NAME "urb resubmit failed (error=%i)\n", |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 343 | urb->status); |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 344 | } |
| 345 | } |
| 346 | |
| 347 | /* |
| 348 | * Stop and Deallocate URBs |
| 349 | */ |
| 350 | void cx231xx_uninit_vbi_isoc(struct cx231xx *dev) |
| 351 | { |
| 352 | struct urb *urb; |
| 353 | int i; |
| 354 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 355 | cx231xx_info(DRIVER_NAME "cx231xx: called cx231xx_uninit_vbi_isoc\n"); |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 356 | |
| 357 | dev->vbi_mode.isoc_ctl.nfields = -1; |
| 358 | for (i = 0; i < dev->vbi_mode.isoc_ctl.num_bufs; i++) { |
| 359 | urb = dev->vbi_mode.isoc_ctl.urb[i]; |
| 360 | if (urb) { |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 361 | if (!irqs_disabled()) |
| 362 | usb_kill_urb(urb); |
| 363 | else |
| 364 | usb_unlink_urb(urb); |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 365 | |
| 366 | if (dev->vbi_mode.isoc_ctl.transfer_buffer[i]) { |
| 367 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 368 | kfree(dev->vbi_mode.isoc_ctl. |
| 369 | transfer_buffer[i]); |
| 370 | dev->vbi_mode.isoc_ctl.transfer_buffer[i] = |
| 371 | NULL; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 372 | } |
| 373 | usb_free_urb(urb); |
| 374 | dev->vbi_mode.isoc_ctl.urb[i] = NULL; |
| 375 | } |
| 376 | dev->vbi_mode.isoc_ctl.transfer_buffer[i] = NULL; |
| 377 | } |
| 378 | |
| 379 | kfree(dev->vbi_mode.isoc_ctl.urb); |
| 380 | kfree(dev->vbi_mode.isoc_ctl.transfer_buffer); |
| 381 | |
| 382 | dev->vbi_mode.isoc_ctl.urb = NULL; |
| 383 | dev->vbi_mode.isoc_ctl.transfer_buffer = NULL; |
| 384 | dev->vbi_mode.isoc_ctl.num_bufs = 0; |
| 385 | |
| 386 | cx231xx_capture_start(dev, 0, Vbi); |
| 387 | } |
| 388 | EXPORT_SYMBOL_GPL(cx231xx_uninit_vbi_isoc); |
| 389 | |
| 390 | /* |
| 391 | * Allocate URBs and start IRQ |
| 392 | */ |
| 393 | int cx231xx_init_vbi_isoc(struct cx231xx *dev, int max_packets, |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 394 | int num_bufs, int max_pkt_size, |
Mauro Carvalho Chehab | cde4362 | 2009-03-03 13:31:36 -0300 | [diff] [blame^] | 395 | int (*isoc_copy) (struct cx231xx *dev, |
| 396 | struct urb *urb)) |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 397 | { |
| 398 | struct cx231xx_dmaqueue *dma_q = &dev->vbi_mode.vidq; |
| 399 | int i; |
| 400 | int sb_size, pipe; |
| 401 | struct urb *urb; |
| 402 | int rc; |
| 403 | |
| 404 | cx231xx_info(DRIVER_NAME "cx231xx: called cx231xx_prepare_isoc\n"); |
| 405 | |
| 406 | /* De-allocates all pending stuff */ |
| 407 | cx231xx_uninit_vbi_isoc(dev); |
| 408 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 409 | /* clear if any halt */ |
| 410 | usb_clear_halt(dev->udev, |
| 411 | usb_rcvbulkpipe(dev->udev, |
| 412 | dev->vbi_mode.end_point_addr)); |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 413 | |
| 414 | dev->vbi_mode.isoc_ctl.isoc_copy = isoc_copy; |
| 415 | dev->vbi_mode.isoc_ctl.num_bufs = num_bufs; |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 416 | dma_q->pos = 0; |
| 417 | dma_q->is_partial_line = 0; |
| 418 | dma_q->last_sav = 0; |
| 419 | dma_q->current_field = -1; |
| 420 | dma_q->bytes_left_in_line = dev->width << 1; |
| 421 | dma_q->lines_per_field = ((dev->norm & V4L2_STD_625_50) ? |
| 422 | PAL_VBI_LINES : NTSC_VBI_LINES); |
| 423 | dma_q->lines_completed = 0; |
| 424 | for (i = 0; i < 8; i++) |
| 425 | dma_q->partial_buf[i] = 0; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 426 | |
Mauro Carvalho Chehab | cde4362 | 2009-03-03 13:31:36 -0300 | [diff] [blame^] | 427 | dev->vbi_mode.isoc_ctl.urb = kzalloc(sizeof(void *) * num_bufs, |
| 428 | GFP_KERNEL); |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 429 | if (!dev->vbi_mode.isoc_ctl.urb) { |
| 430 | cx231xx_errdev("cannot alloc memory for usb buffers\n"); |
| 431 | return -ENOMEM; |
| 432 | } |
| 433 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 434 | dev->vbi_mode.isoc_ctl.transfer_buffer = |
| 435 | kzalloc(sizeof(void *) * num_bufs, GFP_KERNEL); |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 436 | if (!dev->vbi_mode.isoc_ctl.transfer_buffer) { |
| 437 | cx231xx_errdev("cannot allocate memory for usbtransfer\n"); |
| 438 | kfree(dev->vbi_mode.isoc_ctl.urb); |
| 439 | return -ENOMEM; |
| 440 | } |
| 441 | |
| 442 | dev->vbi_mode.isoc_ctl.max_pkt_size = max_pkt_size; |
| 443 | dev->vbi_mode.isoc_ctl.buf = NULL; |
| 444 | |
| 445 | sb_size = max_packets * dev->vbi_mode.isoc_ctl.max_pkt_size; |
| 446 | |
| 447 | /* allocate urbs and transfer buffers */ |
| 448 | for (i = 0; i < dev->vbi_mode.isoc_ctl.num_bufs; i++) { |
| 449 | |
| 450 | urb = usb_alloc_urb(0, GFP_KERNEL); |
| 451 | if (!urb) { |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 452 | cx231xx_err(DRIVER_NAME |
| 453 | ": cannot alloc isoc_ctl.urb %i\n", i); |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 454 | cx231xx_uninit_vbi_isoc(dev); |
| 455 | return -ENOMEM; |
| 456 | } |
| 457 | dev->vbi_mode.isoc_ctl.urb[i] = urb; |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 458 | urb->transfer_flags = 0; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 459 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 460 | dev->vbi_mode.isoc_ctl.transfer_buffer[i] = |
| 461 | kzalloc(sb_size, GFP_KERNEL); |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 462 | if (!dev->vbi_mode.isoc_ctl.transfer_buffer[i]) { |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 463 | cx231xx_err(DRIVER_NAME |
| 464 | ": unable to allocate %i bytes for transfer" |
| 465 | " buffer %i%s\n", sb_size, i, |
Mauro Carvalho Chehab | cde4362 | 2009-03-03 13:31:36 -0300 | [diff] [blame^] | 466 | in_interrupt() ? " while in int" : ""); |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 467 | cx231xx_uninit_vbi_isoc(dev); |
| 468 | return -ENOMEM; |
| 469 | } |
| 470 | |
| 471 | pipe = usb_rcvbulkpipe(dev->udev, dev->vbi_mode.end_point_addr); |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 472 | usb_fill_bulk_urb(urb, dev->udev, pipe, |
| 473 | dev->vbi_mode.isoc_ctl.transfer_buffer[i], |
| 474 | sb_size, cx231xx_irq_vbi_callback, dma_q); |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 475 | } |
| 476 | |
| 477 | init_waitqueue_head(&dma_q->wq); |
| 478 | |
| 479 | /* submit urbs and enables IRQ */ |
| 480 | for (i = 0; i < dev->vbi_mode.isoc_ctl.num_bufs; i++) { |
| 481 | rc = usb_submit_urb(dev->vbi_mode.isoc_ctl.urb[i], GFP_ATOMIC); |
| 482 | if (rc) { |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 483 | cx231xx_err(DRIVER_NAME |
| 484 | ": submit of urb %i failed (error=%i)\n", i, |
| 485 | rc); |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 486 | cx231xx_uninit_vbi_isoc(dev); |
| 487 | return rc; |
| 488 | } |
| 489 | } |
| 490 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 491 | cx231xx_capture_start(dev, 1, Vbi); |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 492 | |
| 493 | return 0; |
| 494 | } |
| 495 | EXPORT_SYMBOL_GPL(cx231xx_init_vbi_isoc); |
| 496 | |
Mauro Carvalho Chehab | cde4362 | 2009-03-03 13:31:36 -0300 | [diff] [blame^] | 497 | u32 cx231xx_get_vbi_line(struct cx231xx *dev, struct cx231xx_dmaqueue *dma_q, |
| 498 | u8 sav_eav, u8 *p_buffer, u32 buffer_size) |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 499 | { |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 500 | u32 bytes_copied = 0; |
| 501 | int current_field = -1; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 502 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 503 | switch (sav_eav) { |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 504 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 505 | case SAV_VBI_FIELD1: |
| 506 | current_field = 1; |
| 507 | break; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 508 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 509 | case SAV_VBI_FIELD2: |
| 510 | current_field = 2; |
| 511 | break; |
| 512 | default: |
| 513 | break; |
| 514 | } |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 515 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 516 | if (current_field < 0) |
| 517 | return bytes_copied; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 518 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 519 | dma_q->last_sav = sav_eav; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 520 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 521 | bytes_copied = |
| 522 | cx231xx_copy_vbi_line(dev, dma_q, p_buffer, buffer_size, |
| 523 | current_field); |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 524 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 525 | return bytes_copied; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 526 | } |
| 527 | |
| 528 | /* |
| 529 | * Announces that a buffer were filled and request the next |
| 530 | */ |
| 531 | static inline void vbi_buffer_filled(struct cx231xx *dev, |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 532 | struct cx231xx_dmaqueue *dma_q, |
| 533 | struct cx231xx_buffer *buf) |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 534 | { |
| 535 | /* Advice that buffer was filled */ |
| 536 | /* cx231xx_info(DRIVER_NAME "[%p/%d] wakeup\n", buf, buf->vb.i); */ |
| 537 | |
| 538 | buf->vb.state = VIDEOBUF_DONE; |
| 539 | buf->vb.field_count++; |
| 540 | do_gettimeofday(&buf->vb.ts); |
| 541 | |
| 542 | dev->vbi_mode.isoc_ctl.buf = NULL; |
| 543 | |
| 544 | list_del(&buf->vb.queue); |
| 545 | wake_up(&buf->vb.done); |
| 546 | } |
| 547 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 548 | u32 cx231xx_copy_vbi_line(struct cx231xx *dev, struct cx231xx_dmaqueue *dma_q, |
Mauro Carvalho Chehab | cde4362 | 2009-03-03 13:31:36 -0300 | [diff] [blame^] | 549 | u8 *p_line, u32 length, int field_number) |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 550 | { |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 551 | u32 bytes_to_copy; |
| 552 | struct cx231xx_buffer *buf; |
| 553 | u32 _line_size = dev->width * 2; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 554 | |
Mauro Carvalho Chehab | cde4362 | 2009-03-03 13:31:36 -0300 | [diff] [blame^] | 555 | if (dma_q->current_field != field_number) |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 556 | cx231xx_reset_vbi_buffer(dev, dma_q); |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 557 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 558 | /* get the buffer pointer */ |
| 559 | buf = dev->vbi_mode.isoc_ctl.buf; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 560 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 561 | /* Remember the field number for next time */ |
| 562 | dma_q->current_field = field_number; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 563 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 564 | bytes_to_copy = dma_q->bytes_left_in_line; |
| 565 | if (bytes_to_copy > length) |
| 566 | bytes_to_copy = length; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 567 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 568 | if (dma_q->lines_completed >= dma_q->lines_per_field) { |
| 569 | dma_q->bytes_left_in_line -= bytes_to_copy; |
| 570 | dma_q->is_partial_line = |
| 571 | (dma_q->bytes_left_in_line == 0) ? 0 : 1; |
| 572 | return 0; |
| 573 | } |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 574 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 575 | dma_q->is_partial_line = 1; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 576 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 577 | /* If we don't have a buffer, just return the number of bytes we would |
| 578 | have copied if we had a buffer. */ |
| 579 | if (!buf) { |
| 580 | dma_q->bytes_left_in_line -= bytes_to_copy; |
| 581 | dma_q->is_partial_line = |
| 582 | (dma_q->bytes_left_in_line == 0) ? 0 : 1; |
| 583 | return bytes_to_copy; |
| 584 | } |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 585 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 586 | /* copy the data to video buffer */ |
| 587 | cx231xx_do_vbi_copy(dev, dma_q, p_line, bytes_to_copy); |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 588 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 589 | dma_q->pos += bytes_to_copy; |
| 590 | dma_q->bytes_left_in_line -= bytes_to_copy; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 591 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 592 | if (dma_q->bytes_left_in_line == 0) { |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 593 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 594 | dma_q->bytes_left_in_line = _line_size; |
| 595 | dma_q->lines_completed++; |
| 596 | dma_q->is_partial_line = 0; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 597 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 598 | if (cx231xx_is_vbi_buffer_done(dev, dma_q) && buf) { |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 599 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 600 | vbi_buffer_filled(dev, dma_q, buf); |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 601 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 602 | dma_q->pos = 0; |
| 603 | buf = NULL; |
| 604 | dma_q->lines_completed = 0; |
| 605 | } |
| 606 | } |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 607 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 608 | return bytes_to_copy; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 609 | } |
| 610 | |
| 611 | /* |
| 612 | * video-buf generic routine to get the next available buffer |
| 613 | */ |
| 614 | static inline void get_next_vbi_buf(struct cx231xx_dmaqueue *dma_q, |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 615 | struct cx231xx_buffer **buf) |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 616 | { |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 617 | struct cx231xx_video_mode *vmode = |
| 618 | container_of(dma_q, struct cx231xx_video_mode, vidq); |
| 619 | struct cx231xx *dev = container_of(vmode, struct cx231xx, vbi_mode); |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 620 | char *outp; |
| 621 | |
| 622 | if (list_empty(&dma_q->active)) { |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 623 | cx231xx_err(DRIVER_NAME ": No active queue to serve\n"); |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 624 | dev->vbi_mode.isoc_ctl.buf = NULL; |
| 625 | *buf = NULL; |
| 626 | return; |
| 627 | } |
| 628 | |
| 629 | /* Get the next buffer */ |
| 630 | *buf = list_entry(dma_q->active.next, struct cx231xx_buffer, vb.queue); |
| 631 | |
| 632 | /* Cleans up buffer - Usefull for testing for frame/URB loss */ |
| 633 | outp = videobuf_to_vmalloc(&(*buf)->vb); |
| 634 | memset(outp, 0, (*buf)->vb.size); |
| 635 | |
| 636 | dev->vbi_mode.isoc_ctl.buf = *buf; |
| 637 | |
| 638 | return; |
| 639 | } |
| 640 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 641 | void cx231xx_reset_vbi_buffer(struct cx231xx *dev, |
| 642 | struct cx231xx_dmaqueue *dma_q) |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 643 | { |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 644 | struct cx231xx_buffer *buf; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 645 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 646 | buf = dev->vbi_mode.isoc_ctl.buf; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 647 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 648 | if (buf == NULL) { |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 649 | /* first try to get the buffer */ |
| 650 | get_next_vbi_buf(dma_q, &buf); |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 651 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 652 | dma_q->pos = 0; |
| 653 | dma_q->current_field = -1; |
| 654 | } |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 655 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 656 | dma_q->bytes_left_in_line = dev->width << 1; |
| 657 | dma_q->lines_completed = 0; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 658 | } |
| 659 | |
| 660 | int cx231xx_do_vbi_copy(struct cx231xx *dev, struct cx231xx_dmaqueue *dma_q, |
Mauro Carvalho Chehab | cde4362 | 2009-03-03 13:31:36 -0300 | [diff] [blame^] | 661 | u8 *p_buffer, u32 bytes_to_copy) |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 662 | { |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 663 | u8 *p_out_buffer = NULL; |
| 664 | u32 current_line_bytes_copied = 0; |
| 665 | struct cx231xx_buffer *buf; |
| 666 | u32 _line_size = dev->width << 1; |
| 667 | void *startwrite; |
| 668 | int offset, lencopy; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 669 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 670 | buf = dev->vbi_mode.isoc_ctl.buf; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 671 | |
Mauro Carvalho Chehab | cde4362 | 2009-03-03 13:31:36 -0300 | [diff] [blame^] | 672 | if (buf == NULL) |
| 673 | return -EINVAL; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 674 | |
| 675 | p_out_buffer = videobuf_to_vmalloc(&buf->vb); |
| 676 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 677 | if (dma_q->bytes_left_in_line != _line_size) { |
| 678 | current_line_bytes_copied = |
| 679 | _line_size - dma_q->bytes_left_in_line; |
| 680 | } |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 681 | |
Mauro Carvalho Chehab | cde4362 | 2009-03-03 13:31:36 -0300 | [diff] [blame^] | 682 | offset = (dma_q->lines_completed * _line_size) + |
| 683 | current_line_bytes_copied; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 684 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 685 | /* prepare destination address */ |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 686 | startwrite = p_out_buffer + offset; |
| 687 | |
Mauro Carvalho Chehab | cde4362 | 2009-03-03 13:31:36 -0300 | [diff] [blame^] | 688 | lencopy = dma_q->bytes_left_in_line > bytes_to_copy ? |
| 689 | bytes_to_copy : dma_q->bytes_left_in_line; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 690 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 691 | memcpy(startwrite, p_buffer, lencopy); |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 692 | |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 693 | return 0; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 694 | } |
| 695 | |
Mauro Carvalho Chehab | cde4362 | 2009-03-03 13:31:36 -0300 | [diff] [blame^] | 696 | u8 cx231xx_is_vbi_buffer_done(struct cx231xx *dev, |
| 697 | struct cx231xx_dmaqueue *dma_q) |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 698 | { |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 699 | u32 height = 0; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 700 | |
| 701 | height = ((dev->norm & V4L2_STD_625_50) ? |
Mauro Carvalho Chehab | 84b5dbf | 2009-03-03 06:14:34 -0300 | [diff] [blame] | 702 | PAL_VBI_LINES : NTSC_VBI_LINES); |
| 703 | return (dma_q->lines_completed == height) ? 1 : 0; |
Sri Deevi | e0d3baf | 2009-03-03 14:37:50 -0300 | [diff] [blame] | 704 | } |