akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 1 | /* |
Mauro Carvalho Chehab | 596d92d | 2005-11-08 21:37:24 -0800 | [diff] [blame] | 2 | em2820-core.c - driver for Empia EM2800/EM2820/2840 USB video capture devices |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 3 | |
| 4 | Copyright (C) 2005 Markus Rechberger <mrechberger@gmail.com> |
Mauro Carvalho Chehab | 4ac9791 | 2005-11-08 21:37:43 -0800 | [diff] [blame] | 5 | Ludovico Cavedon <cavedon@sssup.it> |
| 6 | Mauro Carvalho Chehab <mchehab@brturbo.com.br> |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 7 | |
| 8 | Based on the em2800 driver from Sascha Sommer <saschasommer@freenet.de> |
| 9 | |
| 10 | This program is free software; you can redistribute it and/or modify |
| 11 | it under the terms of the GNU General Public License as published by |
| 12 | the Free Software Foundation; either version 2 of the License, or |
| 13 | (at your option) any later version. |
| 14 | |
| 15 | This program is distributed in the hope that it will be useful, |
| 16 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | GNU General Public License for more details. |
| 19 | |
| 20 | You should have received a copy of the GNU General Public License |
| 21 | along with this program; if not, write to the Free Software |
| 22 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 23 | */ |
| 24 | |
| 25 | #include <linux/init.h> |
| 26 | #include <linux/list.h> |
| 27 | #include <linux/module.h> |
| 28 | #include <linux/moduleparam.h> |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 29 | #include <linux/usb.h> |
| 30 | #include <linux/vmalloc.h> |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 31 | |
| 32 | #include "em2820.h" |
| 33 | |
| 34 | /* #define ENABLE_DEBUG_ISOC_FRAMES */ |
| 35 | |
Mauro Carvalho Chehab | 4ac9791 | 2005-11-08 21:37:43 -0800 | [diff] [blame] | 36 | unsigned int core_debug; |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 37 | module_param(core_debug,int,0644); |
| 38 | MODULE_PARM_DESC(core_debug,"enable debug messages [core]"); |
| 39 | |
| 40 | #define em2820_coredbg(fmt, arg...) do {\ |
Mauro Carvalho Chehab | 4ac9791 | 2005-11-08 21:37:43 -0800 | [diff] [blame] | 41 | if (core_debug) \ |
| 42 | printk(KERN_INFO "%s %s :"fmt, \ |
| 43 | dev->name, __FUNCTION__ , ##arg); } while (0) |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 44 | |
Mauro Carvalho Chehab | 4ac9791 | 2005-11-08 21:37:43 -0800 | [diff] [blame] | 45 | unsigned int reg_debug; |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 46 | module_param(reg_debug,int,0644); |
| 47 | MODULE_PARM_DESC(reg_debug,"enable debug messages [URB reg]"); |
| 48 | |
| 49 | #define em2820_regdbg(fmt, arg...) do {\ |
Mauro Carvalho Chehab | 4ac9791 | 2005-11-08 21:37:43 -0800 | [diff] [blame] | 50 | if (reg_debug) \ |
| 51 | printk(KERN_INFO "%s %s :"fmt, \ |
| 52 | dev->name, __FUNCTION__ , ##arg); } while (0) |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 53 | |
Mauro Carvalho Chehab | 4ac9791 | 2005-11-08 21:37:43 -0800 | [diff] [blame] | 54 | unsigned int isoc_debug; |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 55 | module_param(isoc_debug,int,0644); |
Paul Vriens | 55b8b2d | 2005-11-08 21:37:29 -0800 | [diff] [blame] | 56 | MODULE_PARM_DESC(isoc_debug,"enable debug messages [isoc transfers]"); |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 57 | |
| 58 | #define em2820_isocdbg(fmt, arg...) do {\ |
Mauro Carvalho Chehab | 4ac9791 | 2005-11-08 21:37:43 -0800 | [diff] [blame] | 59 | if (isoc_debug) \ |
| 60 | printk(KERN_INFO "%s %s :"fmt, \ |
| 61 | dev->name, __FUNCTION__ , ##arg); } while (0) |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 62 | |
| 63 | static int alt = EM2820_PINOUT; |
| 64 | module_param(alt, int, 0644); |
| 65 | MODULE_PARM_DESC(alt, "alternate setting to use for video endpoint"); |
| 66 | |
| 67 | /* ------------------------------------------------------------------ */ |
| 68 | /* debug help functions */ |
| 69 | |
| 70 | static const char *v4l1_ioctls[] = { |
| 71 | "0", "CGAP", "GCHAN", "SCHAN", "GTUNER", "STUNER", "GPICT", "SPICT", |
| 72 | "CCAPTURE", "GWIN", "SWIN", "GFBUF", "SFBUF", "KEY", "GFREQ", |
| 73 | "SFREQ", "GAUDIO", "SAUDIO", "SYNC", "MCAPTURE", "GMBUF", "GUNIT", |
| 74 | "GCAPTURE", "SCAPTURE", "SPLAYMODE", "SWRITEMODE", "GPLAYINFO", |
| 75 | "SMICROCODE", "GVBIFMT", "SVBIFMT" }; |
| 76 | #define V4L1_IOCTLS ARRAY_SIZE(v4l1_ioctls) |
| 77 | |
| 78 | static const char *v4l2_ioctls[] = { |
| 79 | "QUERYCAP", "1", "ENUM_PIXFMT", "ENUM_FBUFFMT", "G_FMT", "S_FMT", |
| 80 | "G_COMP", "S_COMP", "REQBUFS", "QUERYBUF", "G_FBUF", "S_FBUF", |
| 81 | "G_WIN", "S_WIN", "PREVIEW", "QBUF", "16", "DQBUF", "STREAMON", |
| 82 | "STREAMOFF", "G_PERF", "G_PARM", "S_PARM", "G_STD", "S_STD", |
| 83 | "ENUMSTD", "ENUMINPUT", "G_CTRL", "S_CTRL", "G_TUNER", "S_TUNER", |
| 84 | "G_FREQ", "S_FREQ", "G_AUDIO", "S_AUDIO", "35", "QUERYCTRL", |
| 85 | "QUERYMENU", "G_INPUT", "S_INPUT", "ENUMCVT", "41", "42", "43", |
| 86 | "44", "45", "G_OUTPUT", "S_OUTPUT", "ENUMOUTPUT", "G_AUDOUT", |
| 87 | "S_AUDOUT", "ENUMFX", "G_EFFECT", "S_EFFECT", "G_MODULATOR", |
| 88 | "S_MODULATOR" |
| 89 | }; |
| 90 | #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls) |
| 91 | |
| 92 | void em2820_print_ioctl(char *name, unsigned int cmd) |
| 93 | { |
| 94 | char *dir; |
| 95 | |
| 96 | switch (_IOC_DIR(cmd)) { |
| 97 | case _IOC_NONE: dir = "--"; break; |
| 98 | case _IOC_READ: dir = "r-"; break; |
| 99 | case _IOC_WRITE: dir = "-w"; break; |
| 100 | case _IOC_READ | _IOC_WRITE: dir = "rw"; break; |
| 101 | default: dir = "??"; break; |
| 102 | } |
| 103 | switch (_IOC_TYPE(cmd)) { |
| 104 | case 'v': |
| 105 | printk(KERN_DEBUG "%s: ioctl 0x%08x (v4l1, %s, VIDIOC%s)\n", |
| 106 | name, cmd, dir, (_IOC_NR(cmd) < V4L1_IOCTLS) ? |
| 107 | v4l1_ioctls[_IOC_NR(cmd)] : "???"); |
| 108 | break; |
| 109 | case 'V': |
| 110 | printk(KERN_DEBUG "%s: ioctl 0x%08x (v4l2, %s, VIDIOC_%s)\n", |
| 111 | name, cmd, dir, (_IOC_NR(cmd) < V4L2_IOCTLS) ? |
| 112 | v4l2_ioctls[_IOC_NR(cmd)] : "???"); |
| 113 | break; |
| 114 | default: |
| 115 | printk(KERN_DEBUG "%s: ioctl 0x%08x (???, %s, #%d)\n", |
| 116 | name, cmd, dir, _IOC_NR(cmd)); |
| 117 | } |
| 118 | } |
| 119 | |
| 120 | static void *rvmalloc(size_t size) |
| 121 | { |
| 122 | void *mem; |
| 123 | unsigned long adr; |
| 124 | |
| 125 | size = PAGE_ALIGN(size); |
| 126 | |
| 127 | mem = vmalloc_32((unsigned long)size); |
| 128 | if (!mem) |
| 129 | return NULL; |
| 130 | |
| 131 | memset(mem, 0, size); |
| 132 | |
| 133 | adr = (unsigned long)mem; |
| 134 | while (size > 0) { |
| 135 | SetPageReserved(vmalloc_to_page((void *)adr)); |
| 136 | adr += PAGE_SIZE; |
| 137 | size -= PAGE_SIZE; |
| 138 | } |
| 139 | |
| 140 | return mem; |
| 141 | } |
| 142 | |
| 143 | static void rvfree(void *mem, size_t size) |
| 144 | { |
| 145 | unsigned long adr; |
| 146 | |
| 147 | if (!mem) |
| 148 | return; |
| 149 | |
| 150 | size = PAGE_ALIGN(size); |
| 151 | |
| 152 | adr = (unsigned long)mem; |
| 153 | while (size > 0) { |
| 154 | ClearPageReserved(vmalloc_to_page((void *)adr)); |
| 155 | adr += PAGE_SIZE; |
| 156 | size -= PAGE_SIZE; |
| 157 | } |
| 158 | |
| 159 | vfree(mem); |
| 160 | } |
| 161 | |
| 162 | /* |
| 163 | * em2820_request_buffers() |
| 164 | * allocate a number of buffers |
| 165 | */ |
| 166 | u32 em2820_request_buffers(struct em2820 *dev, u32 count) |
| 167 | { |
| 168 | const size_t imagesize = PAGE_ALIGN(dev->frame_size); /*needs to be page aligned cause the buffers can be mapped individually! */ |
| 169 | void *buff = NULL; |
| 170 | u32 i; |
| 171 | em2820_coredbg("requested %i buffers with size %i", count, imagesize); |
| 172 | if (count > EM2820_NUM_FRAMES) |
| 173 | count = EM2820_NUM_FRAMES; |
| 174 | |
| 175 | dev->num_frames = count; |
| 176 | while (dev->num_frames > 0) { |
| 177 | if ((buff = rvmalloc(dev->num_frames * imagesize))) |
| 178 | break; |
| 179 | dev->num_frames--; |
| 180 | } |
| 181 | |
| 182 | for (i = 0; i < dev->num_frames; i++) { |
| 183 | dev->frame[i].bufmem = buff + i * imagesize; |
| 184 | dev->frame[i].buf.index = i; |
| 185 | dev->frame[i].buf.m.offset = i * imagesize; |
| 186 | dev->frame[i].buf.length = dev->frame_size; |
| 187 | dev->frame[i].buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
| 188 | dev->frame[i].buf.sequence = 0; |
| 189 | dev->frame[i].buf.field = V4L2_FIELD_NONE; |
| 190 | dev->frame[i].buf.memory = V4L2_MEMORY_MMAP; |
| 191 | dev->frame[i].buf.flags = 0; |
| 192 | } |
| 193 | return dev->num_frames; |
| 194 | } |
| 195 | |
| 196 | /* |
| 197 | * em2820_queue_unusedframes() |
| 198 | * add all frames that are not currently in use to the inbuffer queue |
| 199 | */ |
| 200 | void em2820_queue_unusedframes(struct em2820 *dev) |
| 201 | { |
| 202 | unsigned long lock_flags; |
| 203 | u32 i; |
| 204 | |
| 205 | for (i = 0; i < dev->num_frames; i++) |
| 206 | if (dev->frame[i].state == F_UNUSED) { |
| 207 | dev->frame[i].state = F_QUEUED; |
| 208 | spin_lock_irqsave(&dev->queue_lock, lock_flags); |
| 209 | list_add_tail(&dev->frame[i].frame, &dev->inqueue); |
| 210 | spin_unlock_irqrestore(&dev->queue_lock, lock_flags); |
| 211 | } |
| 212 | } |
| 213 | |
| 214 | /* |
| 215 | * em2820_release_buffers() |
| 216 | * free frame buffers |
| 217 | */ |
| 218 | void em2820_release_buffers(struct em2820 *dev) |
| 219 | { |
| 220 | if (dev->num_frames) { |
| 221 | rvfree(dev->frame[0].bufmem, |
| 222 | dev->num_frames * PAGE_ALIGN(dev->frame[0].buf.length)); |
| 223 | dev->num_frames = 0; |
| 224 | } |
| 225 | } |
| 226 | |
| 227 | /* |
| 228 | * em2820_read_reg_req() |
| 229 | * reads data from the usb device specifying bRequest |
| 230 | */ |
| 231 | int em2820_read_reg_req_len(struct em2820 *dev, u8 req, u16 reg, |
| 232 | char *buf, int len) |
| 233 | { |
| 234 | int ret, byte; |
| 235 | |
| 236 | em2820_regdbg("req=%02x, reg=%02x ", req, reg); |
| 237 | |
| 238 | ret = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0), req, |
| 239 | USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, |
| 240 | 0x0000, reg, buf, len, HZ); |
| 241 | |
| 242 | if (reg_debug){ |
| 243 | printk(ret < 0 ? " failed!\n" : "%02x values: ", ret); |
| 244 | for (byte = 0; byte < len; byte++) { |
| 245 | printk(" %02x", buf[byte]); |
| 246 | } |
| 247 | printk("\n"); |
| 248 | } |
| 249 | |
| 250 | return ret; |
| 251 | } |
| 252 | |
| 253 | /* |
| 254 | * em2820_read_reg_req() |
| 255 | * reads data from the usb device specifying bRequest |
| 256 | */ |
| 257 | int em2820_read_reg_req(struct em2820 *dev, u8 req, u16 reg) |
| 258 | { |
| 259 | u8 val; |
| 260 | int ret; |
| 261 | |
| 262 | em2820_regdbg("req=%02x, reg=%02x:", req, reg); |
| 263 | |
| 264 | ret = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0), req, |
| 265 | USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, |
| 266 | 0x0000, reg, &val, 1, HZ); |
| 267 | |
| 268 | if (reg_debug) |
| 269 | printk(ret < 0 ? " failed!\n" : "%02x\n", val); |
| 270 | |
| 271 | if (ret < 0) |
| 272 | return ret; |
| 273 | |
| 274 | return val; |
| 275 | } |
| 276 | |
| 277 | int em2820_read_reg(struct em2820 *dev, u16 reg) |
| 278 | { |
| 279 | return em2820_read_reg_req(dev, USB_REQ_GET_STATUS, reg); |
| 280 | } |
| 281 | |
| 282 | /* |
| 283 | * em2820_write_regs_req() |
| 284 | * sends data to the usb device, specifying bRequest |
| 285 | */ |
| 286 | int em2820_write_regs_req(struct em2820 *dev, u8 req, u16 reg, char *buf, |
| 287 | int len) |
| 288 | { |
| 289 | int ret; |
| 290 | |
| 291 | /*usb_control_msg seems to expect a kmalloced buffer */ |
| 292 | unsigned char *bufs = kmalloc(len, GFP_KERNEL); |
| 293 | |
| 294 | em2820_regdbg("req=%02x reg=%02x:", req, reg); |
| 295 | |
| 296 | if (reg_debug) { |
| 297 | int i; |
| 298 | for (i = 0; i < len; ++i) |
| 299 | printk (" %02x", (unsigned char)buf[i]); |
| 300 | printk ("\n"); |
| 301 | } |
| 302 | |
| 303 | if (!bufs) |
| 304 | return -ENOMEM; |
| 305 | memcpy(bufs, buf, len); |
| 306 | ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0), req, |
| 307 | USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, |
| 308 | 0x0000, reg, bufs, len, HZ); |
| 309 | mdelay(5); /* FIXME: magic number */ |
| 310 | kfree(bufs); |
| 311 | return ret; |
| 312 | } |
| 313 | |
| 314 | int em2820_write_regs(struct em2820 *dev, u16 reg, char *buf, int len) |
| 315 | { |
| 316 | return em2820_write_regs_req(dev, USB_REQ_GET_STATUS, reg, buf, len); |
| 317 | } |
| 318 | |
| 319 | /* |
| 320 | * em2820_write_reg_bits() |
| 321 | * sets only some bits (specified by bitmask) of a register, by first reading |
| 322 | * the actual value |
| 323 | */ |
| 324 | int em2820_write_reg_bits(struct em2820 *dev, u16 reg, u8 val, |
| 325 | u8 bitmask) |
| 326 | { |
| 327 | int oldval; |
| 328 | u8 newval; |
| 329 | if ((oldval = em2820_read_reg(dev, reg)) < 0) |
| 330 | return oldval; |
| 331 | newval = (((u8) oldval) & ~bitmask) | (val & bitmask); |
| 332 | return em2820_write_regs(dev, reg, &newval, 1); |
| 333 | } |
| 334 | |
| 335 | /* |
| 336 | * em2820_write_ac97() |
| 337 | * write a 16 bit value to the specified AC97 address (LSB first!) |
| 338 | */ |
| 339 | int em2820_write_ac97(struct em2820 *dev, u8 reg, u8 * val) |
| 340 | { |
| 341 | int ret; |
| 342 | u8 addr = reg & 0x7f; |
| 343 | if ((ret = em2820_write_regs(dev, AC97LSB_REG, val, 2)) < 0) |
| 344 | return ret; |
| 345 | if ((ret = em2820_write_regs(dev, AC97ADDR_REG, &addr, 1)) < 0) |
| 346 | return ret; |
| 347 | if ((ret = em2820_read_reg(dev, AC97BUSY_REG)) < 0) |
| 348 | return ret; |
| 349 | else if (((u8) ret) & 0x01) { |
| 350 | em2820_warn ("AC97 command still being exectuted: not handled properly!\n"); |
| 351 | } |
| 352 | return 0; |
| 353 | } |
| 354 | |
| 355 | int em2820_audio_analog_set(struct em2820 *dev) |
| 356 | { |
| 357 | char s[2] = { 0x00, 0x00 }; |
| 358 | s[0] |= 0x1f - dev->volume; |
| 359 | s[1] |= 0x1f - dev->volume; |
| 360 | if (dev->mute) |
| 361 | s[1] |= 0x80; |
| 362 | return em2820_write_ac97(dev, MASTER_AC97, s); |
| 363 | } |
| 364 | |
| 365 | |
| 366 | int em2820_colorlevels_set_default(struct em2820 *dev) |
| 367 | { |
| 368 | em2820_write_regs(dev, YGAIN_REG, "\x10", 1); /* contrast */ |
| 369 | em2820_write_regs(dev, YOFFSET_REG, "\x00", 1); /* brightness */ |
| 370 | em2820_write_regs(dev, UVGAIN_REG, "\x10", 1); /* saturation */ |
| 371 | em2820_write_regs(dev, UOFFSET_REG, "\x00", 1); |
| 372 | em2820_write_regs(dev, VOFFSET_REG, "\x00", 1); |
| 373 | em2820_write_regs(dev, SHARPNESS_REG, "\x00", 1); |
| 374 | |
| 375 | em2820_write_regs(dev, GAMMA_REG, "\x20", 1); |
| 376 | em2820_write_regs(dev, RGAIN_REG, "\x20", 1); |
| 377 | em2820_write_regs(dev, GGAIN_REG, "\x20", 1); |
| 378 | em2820_write_regs(dev, BGAIN_REG, "\x20", 1); |
| 379 | em2820_write_regs(dev, ROFFSET_REG, "\x00", 1); |
| 380 | em2820_write_regs(dev, GOFFSET_REG, "\x00", 1); |
| 381 | return em2820_write_regs(dev, BOFFSET_REG, "\x00", 1); |
| 382 | } |
| 383 | |
| 384 | int em2820_capture_start(struct em2820 *dev, int start) |
| 385 | { |
| 386 | int ret; |
| 387 | /* FIXME: which is the best order? */ |
| 388 | /* video registers are sampled by VREF */ |
| 389 | if ((ret = em2820_write_reg_bits(dev, USBSUSP_REG, start ? 0x10 : 0x00, |
| 390 | 0x10)) < 0) |
| 391 | return ret; |
| 392 | /* enable video capture */ |
| 393 | return em2820_write_regs(dev, VINENABLE_REG, start ? "\x67" : "\x27", 1); |
| 394 | } |
| 395 | |
| 396 | int em2820_outfmt_set_yuv422(struct em2820 *dev) |
| 397 | { |
| 398 | em2820_write_regs(dev, OUTFMT_REG, "\x34", 1); |
| 399 | em2820_write_regs(dev, VINMODE_REG, "\x10", 1); |
| 400 | return em2820_write_regs(dev, VINCTRL_REG, "\x11", 1); |
| 401 | } |
| 402 | |
| 403 | int em2820_accumulator_set(struct em2820 *dev, u8 xmin, u8 xmax, u8 ymin, |
| 404 | u8 ymax) |
| 405 | { |
| 406 | em2820_coredbg("em2820 Scale: (%d,%d)-(%d,%d)\n", xmin, ymin, xmax, ymax); |
| 407 | |
| 408 | em2820_write_regs(dev, XMIN_REG, &xmin, 1); |
| 409 | em2820_write_regs(dev, XMAX_REG, &xmax, 1); |
| 410 | em2820_write_regs(dev, YMIN_REG, &ymin, 1); |
| 411 | return em2820_write_regs(dev, YMAX_REG, &ymax, 1); |
| 412 | } |
| 413 | |
| 414 | int em2820_capture_area_set(struct em2820 *dev, u8 hstart, u8 vstart, |
| 415 | u16 width, u16 height) |
| 416 | { |
| 417 | u8 cwidth = width; |
| 418 | u8 cheight = height; |
| 419 | u8 overflow = (height >> 7 & 0x02) | (width >> 8 & 0x01); |
| 420 | |
| 421 | em2820_coredbg("em2820 Area Set: (%d,%d)\n", (width | (overflow & 2) << 7), |
| 422 | (height | (overflow & 1) << 8)); |
| 423 | |
| 424 | em2820_write_regs(dev, HSTART_REG, &hstart, 1); |
| 425 | em2820_write_regs(dev, VSTART_REG, &vstart, 1); |
| 426 | em2820_write_regs(dev, CWIDTH_REG, &cwidth, 1); |
| 427 | em2820_write_regs(dev, CHEIGHT_REG, &cheight, 1); |
| 428 | return em2820_write_regs(dev, OFLOW_REG, &overflow, 1); |
| 429 | } |
| 430 | |
| 431 | int em2820_scaler_set(struct em2820 *dev, u16 h, u16 v) |
| 432 | { |
Sascha Sommer | 52c02fc | 2005-11-08 21:38:10 -0800 | [diff] [blame] | 433 | u8 mode; |
| 434 | /* the em2800 scaler only supports scaling down to 50% */ |
| 435 | if(dev->is_em2800) |
| 436 | mode = (v ? 0x20 : 0x00) | (h ? 0x10 : 0x00); |
| 437 | else { |
| 438 | u8 buf[2]; |
| 439 | buf[0] = h; |
| 440 | buf[1] = h >> 8; |
| 441 | em2820_write_regs(dev, HSCALELOW_REG, (char *)buf, 2); |
| 442 | buf[0] = v; |
| 443 | buf[1] = v >> 8; |
| 444 | em2820_write_regs(dev, VSCALELOW_REG, (char *)buf, 2); |
| 445 | /* it seems that both H and V scalers must be active to work correctly */ |
| 446 | mode = (h || v)? 0x30: 0x00; |
Sascha Sommer | 74458e6 | 2005-11-08 21:37:33 -0800 | [diff] [blame] | 447 | } |
Sascha Sommer | 52c02fc | 2005-11-08 21:38:10 -0800 | [diff] [blame] | 448 | return em2820_write_reg_bits(dev, COMPR_REG, mode, 0x30); |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 449 | } |
| 450 | |
| 451 | /* FIXME: this only function read values from dev */ |
| 452 | int em2820_resolution_set(struct em2820 *dev) |
| 453 | { |
| 454 | int width, height; |
| 455 | width = norm_maxw(dev); |
| 456 | height = norm_maxh(dev) >> 1; |
| 457 | |
| 458 | em2820_outfmt_set_yuv422(dev); |
| 459 | em2820_accumulator_set(dev, 1, (width - 4) >> 2, 1, (height - 4) >> 2); |
| 460 | em2820_capture_area_set(dev, 0, 0, width >> 2, height >> 2); |
| 461 | return em2820_scaler_set(dev, dev->hscale, dev->vscale); |
| 462 | } |
| 463 | |
| 464 | |
| 465 | /******************* isoc transfer handling ****************************/ |
| 466 | |
| 467 | #ifdef ENABLE_DEBUG_ISOC_FRAMES |
| 468 | static void em2820_isoc_dump(struct urb *urb, struct pt_regs *regs) |
| 469 | { |
| 470 | int len = 0; |
| 471 | int ntrans = 0; |
| 472 | int i; |
| 473 | |
| 474 | printk(KERN_DEBUG "isocIrq: sf=%d np=%d ec=%x\n", |
| 475 | urb->start_frame, urb->number_of_packets, |
| 476 | urb->error_count); |
| 477 | for (i = 0; i < urb->number_of_packets; i++) { |
| 478 | unsigned char *buf = |
| 479 | urb->transfer_buffer + |
| 480 | urb->iso_frame_desc[i].offset; |
| 481 | int alen = urb->iso_frame_desc[i].actual_length; |
| 482 | if (alen > 0) { |
| 483 | if (buf[0] == 0x88) { |
| 484 | ntrans++; |
| 485 | len += alen; |
| 486 | } else if (buf[0] == 0x22) { |
| 487 | printk(KERN_DEBUG |
| 488 | "= l=%d nt=%d bpp=%d\n", |
| 489 | len - 4 * ntrans, ntrans, |
| 490 | ntrans == 0 ? 0 : len / ntrans); |
| 491 | ntrans = 1; |
| 492 | len = alen; |
| 493 | } else |
| 494 | printk(KERN_DEBUG "!\n"); |
| 495 | } |
| 496 | printk(KERN_DEBUG " n=%d s=%d al=%d %x\n", i, |
| 497 | urb->iso_frame_desc[i].status, |
| 498 | urb->iso_frame_desc[i].actual_length, |
| 499 | (unsigned int) |
| 500 | *((unsigned char *)(urb->transfer_buffer + |
| 501 | urb->iso_frame_desc[i]. |
| 502 | offset))); |
| 503 | } |
| 504 | } |
| 505 | #endif |
| 506 | |
| 507 | static inline int em2820_isoc_video(struct em2820 *dev,struct em2820_frame_t **f, |
| 508 | unsigned long *lock_flags, unsigned char buf) |
| 509 | { |
| 510 | if (!(buf & 0x01)) { |
| 511 | if ((*f)->state == F_GRABBING) { |
| 512 | /*previous frame is incomplete */ |
| 513 | if ((*f)->fieldbytesused < dev->field_size) { |
| 514 | (*f)->state = F_ERROR; |
| 515 | em2820_isocdbg ("dropping incomplete bottom field (%i missing bytes)", |
| 516 | dev->field_size-(*f)->fieldbytesused); |
| 517 | } else { |
| 518 | (*f)->state = F_DONE; |
| 519 | (*f)->buf.bytesused = dev->frame_size; |
| 520 | } |
| 521 | } |
| 522 | if ((*f)->state == F_DONE || (*f)->state == F_ERROR) { |
| 523 | /* move current frame to outqueue and get next free buffer from inqueue */ |
| 524 | spin_lock_irqsave(&dev-> queue_lock, *lock_flags); |
| 525 | list_move_tail(&(*f)->frame, &dev->outqueue); |
| 526 | if (!list_empty(&dev->inqueue)) |
| 527 | (*f) = list_entry(dev-> inqueue.next, |
| 528 | struct em2820_frame_t,frame); |
| 529 | else |
| 530 | (*f) = NULL; |
| 531 | spin_unlock_irqrestore(&dev->queue_lock,*lock_flags); |
| 532 | } |
| 533 | if (!(*f)) { |
| 534 | em2820_isocdbg ("new frame but no buffer is free"); |
| 535 | return -1; |
| 536 | } |
| 537 | do_gettimeofday(&(*f)->buf.timestamp); |
| 538 | (*f)->buf.sequence = ++dev->frame_count; |
| 539 | (*f)->buf.field = V4L2_FIELD_INTERLACED; |
| 540 | (*f)->state = F_GRABBING; |
| 541 | (*f)->buf.bytesused = 0; |
| 542 | (*f)->top_field = 1; |
| 543 | (*f)->fieldbytesused = 0; |
| 544 | } else { |
| 545 | /* acquiring bottom field */ |
| 546 | if ((*f)->state == F_GRABBING) { |
| 547 | if (!(*f)->top_field) { |
| 548 | (*f)->state = F_ERROR; |
| 549 | em2820_isocdbg ("unexpected begin of bottom field; discarding it"); |
| 550 | } else if ((*f)-> fieldbytesused < dev->field_size - 172) { |
| 551 | (*f)->state = F_ERROR; |
| 552 | em2820_isocdbg ("dropping incomplete top field (%i missing bytes)", |
| 553 | dev->field_size-(*f)->fieldbytesused); |
| 554 | } else { |
| 555 | (*f)->top_field = 0; |
| 556 | (*f)->fieldbytesused = 0; |
| 557 | } |
| 558 | } |
| 559 | } |
| 560 | return (0); |
| 561 | } |
| 562 | |
| 563 | static inline void em2820_isoc_video_copy(struct em2820 *dev, |
| 564 | struct em2820_frame_t **f, unsigned char *buf, int len) |
| 565 | { |
| 566 | void *fieldstart, *startwrite, *startread; |
| 567 | int linesdone, currlinedone, offset, lencopy,remain; |
| 568 | |
Mauro Carvalho Chehab | 596d92d | 2005-11-08 21:37:24 -0800 | [diff] [blame] | 569 | if(dev->frame_size != (*f)->buf.length){ |
| 570 | em2820_err("frame_size %i and buf.length %i are different!!!\n",dev->frame_size,(*f)->buf.length); |
| 571 | return; |
| 572 | } |
| 573 | |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 574 | if ((*f)->fieldbytesused + len > dev->field_size) |
| 575 | len =dev->field_size - (*f)->fieldbytesused; |
Mauro Carvalho Chehab | feff048 | 2005-11-08 21:38:16 -0800 | [diff] [blame^] | 576 | |
| 577 | if (buf[0] != 0x88 && buf[0] != 0x22) { |
| 578 | em2820_isocdbg("frame is not complete\n"); |
| 579 | startread = buf; |
| 580 | len+=4; |
| 581 | } else |
| 582 | startread = buf + 4; |
| 583 | |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 584 | remain = len; |
Mauro Carvalho Chehab | feff048 | 2005-11-08 21:38:16 -0800 | [diff] [blame^] | 585 | |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 586 | if ((*f)->top_field) |
| 587 | fieldstart = (*f)->bufmem; |
| 588 | else |
| 589 | fieldstart = (*f)->bufmem + dev->bytesperline; |
| 590 | |
| 591 | linesdone = (*f)->fieldbytesused / dev->bytesperline; |
| 592 | currlinedone = (*f)->fieldbytesused % dev->bytesperline; |
| 593 | offset = linesdone * dev->bytesperline * 2 + currlinedone; |
| 594 | startwrite = fieldstart + offset; |
| 595 | lencopy = dev->bytesperline - currlinedone; |
| 596 | lencopy = lencopy > remain ? remain : lencopy; |
| 597 | |
| 598 | memcpy(startwrite, startread, lencopy); |
| 599 | remain -= lencopy; |
| 600 | |
| 601 | while (remain > 0) { |
| 602 | startwrite += lencopy + dev->bytesperline; |
| 603 | startread += lencopy; |
| 604 | if (dev->bytesperline > remain) |
| 605 | lencopy = remain; |
| 606 | else |
| 607 | lencopy = dev->bytesperline; |
| 608 | |
| 609 | memcpy(startwrite, startread, lencopy); |
| 610 | remain -= lencopy; |
| 611 | } |
| 612 | |
| 613 | (*f)->fieldbytesused += len; |
| 614 | } |
| 615 | |
| 616 | /* |
| 617 | * em2820_isoIrq() |
| 618 | * handles the incoming isoc urbs and fills the frames from our inqueue |
| 619 | */ |
| 620 | void em2820_isocIrq(struct urb *urb, struct pt_regs *regs) |
| 621 | { |
| 622 | struct em2820 *dev = urb->context; |
| 623 | int i, status; |
| 624 | struct em2820_frame_t **f; |
| 625 | unsigned long lock_flags; |
| 626 | |
| 627 | if (!dev) |
| 628 | return; |
| 629 | #ifdef ENABLE_DEBUG_ISOC_FRAMES |
| 630 | if (isoc_debug>1) |
| 631 | em2820_isoc_dump(urb, regs); |
| 632 | #endif |
| 633 | |
| 634 | if (urb->status == -ENOENT) |
| 635 | return; |
| 636 | |
| 637 | f = &dev->frame_current; |
| 638 | |
| 639 | if (dev->stream == STREAM_INTERRUPT) { |
| 640 | dev->stream = STREAM_OFF; |
| 641 | if ((*f)) |
| 642 | (*f)->state = F_QUEUED; |
| 643 | em2820_isocdbg("stream interrupted"); |
| 644 | wake_up_interruptible(&dev->wait_stream); |
| 645 | } |
| 646 | |
| 647 | if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED)) |
| 648 | return; |
| 649 | |
| 650 | if (dev->stream == STREAM_ON && !list_empty(&dev->inqueue)) { |
| 651 | if (!(*f)) |
| 652 | (*f) = list_entry(dev->inqueue.next, |
| 653 | struct em2820_frame_t, frame); |
| 654 | |
| 655 | for (i = 0; i < urb->number_of_packets; i++) { |
| 656 | unsigned char *buf = urb->transfer_buffer + |
| 657 | urb->iso_frame_desc[i].offset; |
| 658 | int len = urb->iso_frame_desc[i].actual_length - 4; |
| 659 | |
| 660 | if (urb->iso_frame_desc[i].status) { |
| 661 | em2820_isocdbg("data error: [%d] len=%d, status=%d", i, |
| 662 | urb->iso_frame_desc[i].actual_length, |
| 663 | urb->iso_frame_desc[i].status); |
Mauro Carvalho Chehab | feff048 | 2005-11-08 21:38:16 -0800 | [diff] [blame^] | 664 | if (urb->iso_frame_desc[i].status != -EPROTO) |
| 665 | continue; |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 666 | } |
| 667 | if (urb->iso_frame_desc[i].actual_length <= 0) { |
| 668 | em2820_isocdbg("packet %d is empty",i); |
| 669 | continue; |
| 670 | } |
| 671 | if (urb->iso_frame_desc[i].actual_length > |
| 672 | dev->max_pkt_size) { |
| 673 | em2820_isocdbg("packet bigger than packet size"); |
| 674 | continue; |
| 675 | } |
| 676 | /*new frame */ |
| 677 | if (buf[0] == 0x22 && buf[1] == 0x5a) { |
| 678 | em2820_isocdbg("Video frame, length=%i!",len); |
| 679 | |
| 680 | if (em2820_isoc_video(dev,f,&lock_flags,buf[2])) |
| 681 | break; |
| 682 | } else if (buf[0]==0x33 && buf[1]==0x95 && buf[2]==0x00) { |
| 683 | em2820_isocdbg("VBI HEADER!!!"); |
| 684 | } |
| 685 | |
| 686 | /* actual copying */ |
| 687 | if ((*f)->state == F_GRABBING) { |
| 688 | em2820_isoc_video_copy(dev,f,buf, len); |
| 689 | } |
| 690 | } |
| 691 | } |
| 692 | |
| 693 | for (i = 0; i < urb->number_of_packets; i++) { |
| 694 | urb->iso_frame_desc[i].status = 0; |
| 695 | urb->iso_frame_desc[i].actual_length = 0; |
| 696 | } |
| 697 | |
| 698 | urb->status = 0; |
| 699 | if ((status = usb_submit_urb(urb, GFP_ATOMIC))) { |
| 700 | em2820_errdev("resubmit of urb failed (error=%i)\n", status); |
| 701 | dev->state |= DEV_MISCONFIGURED; |
| 702 | } |
| 703 | wake_up_interruptible(&dev->wait_frame); |
| 704 | return; |
| 705 | } |
| 706 | |
| 707 | /* |
| 708 | * em2820_uninit_isoc() |
| 709 | * deallocates the buffers and urbs allocated during em2820_init_iosc() |
| 710 | */ |
| 711 | void em2820_uninit_isoc(struct em2820 *dev) |
| 712 | { |
| 713 | int i; |
| 714 | |
| 715 | for (i = 0; i < EM2820_NUM_BUFS; i++) { |
| 716 | if (dev->urb[i]) { |
| 717 | usb_kill_urb(dev->urb[i]); |
Markus Rechberger | 02f7427 | 2005-11-08 21:37:46 -0800 | [diff] [blame] | 718 | if (dev->transfer_buffer[i]){ |
| 719 | usb_buffer_free(dev->udev,(EM2820_NUM_PACKETS*dev->max_pkt_size),dev->transfer_buffer[i],dev->urb[i]->transfer_dma); |
| 720 | } |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 721 | usb_free_urb(dev->urb[i]); |
| 722 | } |
| 723 | dev->urb[i] = NULL; |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 724 | dev->transfer_buffer[i] = NULL; |
| 725 | } |
| 726 | em2820_capture_start(dev, 0); |
| 727 | } |
| 728 | |
| 729 | /* |
| 730 | * em2820_init_isoc() |
| 731 | * allocates transfer buffers and submits the urbs for isoc transfer |
| 732 | */ |
| 733 | int em2820_init_isoc(struct em2820 *dev) |
| 734 | { |
| 735 | /* change interface to 3 which allowes the biggest packet sizes */ |
| 736 | int i, errCode; |
| 737 | const int sb_size = EM2820_NUM_PACKETS * dev->max_pkt_size; |
| 738 | |
| 739 | /* reset streaming vars */ |
| 740 | dev->frame_current = NULL; |
| 741 | dev->frame_count = 0; |
| 742 | |
| 743 | /* allocate urbs */ |
| 744 | for (i = 0; i < EM2820_NUM_BUFS; i++) { |
| 745 | struct urb *urb; |
| 746 | int j, k; |
| 747 | /* allocate transfer buffer */ |
Markus Rechberger | 02f7427 | 2005-11-08 21:37:46 -0800 | [diff] [blame] | 748 | urb = usb_alloc_urb(EM2820_NUM_PACKETS, GFP_KERNEL); |
| 749 | if (!urb){ |
| 750 | em2820_errdev("cannot alloc urb %i\n", i); |
| 751 | em2820_uninit_isoc(dev); |
| 752 | return -ENOMEM; |
| 753 | } |
| 754 | dev->transfer_buffer[i] = usb_buffer_alloc(dev->udev, sb_size, GFP_KERNEL,&urb->transfer_dma); |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 755 | if (!dev->transfer_buffer[i]) { |
| 756 | em2820_errdev |
| 757 | ("unable to allocate %i bytes for transfer buffer %i\n", |
| 758 | sb_size, i); |
| 759 | em2820_uninit_isoc(dev); |
| 760 | return -ENOMEM; |
| 761 | } |
| 762 | memset(dev->transfer_buffer[i], 0, sb_size); |
Markus Rechberger | 02f7427 | 2005-11-08 21:37:46 -0800 | [diff] [blame] | 763 | urb->dev = dev->udev; |
| 764 | urb->context = dev; |
| 765 | urb->pipe = usb_rcvisocpipe(dev->udev, 0x82); |
| 766 | urb->transfer_flags = URB_ISO_ASAP; |
| 767 | urb->interval = 1; |
| 768 | urb->transfer_buffer = dev->transfer_buffer[i]; |
| 769 | urb->complete = em2820_isocIrq; |
| 770 | urb->number_of_packets = EM2820_NUM_PACKETS; |
| 771 | urb->transfer_buffer_length = sb_size; |
| 772 | for (j = k = 0; j < EM2820_NUM_PACKETS; |
| 773 | j++, k += dev->max_pkt_size) { |
| 774 | urb->iso_frame_desc[j].offset = k; |
| 775 | urb->iso_frame_desc[j].length = |
| 776 | dev->max_pkt_size; |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 777 | } |
Markus Rechberger | 02f7427 | 2005-11-08 21:37:46 -0800 | [diff] [blame] | 778 | dev->urb[i] = urb; |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 779 | } |
| 780 | |
| 781 | /* submit urbs */ |
| 782 | for (i = 0; i < EM2820_NUM_BUFS; i++) { |
| 783 | errCode = usb_submit_urb(dev->urb[i], GFP_KERNEL); |
| 784 | if (errCode) { |
| 785 | em2820_errdev("submit of urb %i failed (error=%i)\n", i, |
| 786 | errCode); |
| 787 | em2820_uninit_isoc(dev); |
| 788 | return errCode; |
| 789 | } |
| 790 | } |
| 791 | |
| 792 | return 0; |
| 793 | } |
| 794 | |
| 795 | int em2820_set_alternate(struct em2820 *dev) |
| 796 | { |
| 797 | int errCode, prev_alt = dev->alt; |
| 798 | dev->alt = alt; |
| 799 | if (dev->alt == 0) { |
| 800 | int i; |
Mauro Carvalho Chehab | 596d92d | 2005-11-08 21:37:24 -0800 | [diff] [blame] | 801 | if(dev->is_em2800){ /* always use the max packet size for em2800 based devices */ |
| 802 | for(i=0;i< EM2820_MAX_ALT; i++) |
| 803 | if(dev->alt_max_pkt_size[i]>dev->alt_max_pkt_size[dev->alt]) |
| 804 | dev->alt=i; |
| 805 | }else{ |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 806 | unsigned int min_pkt_size = dev->field_size / 137; /* FIXME: empiric magic number */ |
| 807 | em2820_coredbg("minimum isoc packet size: %u", min_pkt_size); |
| 808 | dev->alt = 7; |
| 809 | for (i = 1; i < EM2820_MAX_ALT; i += 2) /* FIXME: skip even alternate: why do they not work? */ |
| 810 | if (dev->alt_max_pkt_size[i] >= min_pkt_size) { |
| 811 | dev->alt = i; |
| 812 | break; |
| 813 | } |
Mauro Carvalho Chehab | 596d92d | 2005-11-08 21:37:24 -0800 | [diff] [blame] | 814 | } |
akpm@osdl.org | a6c2ba2 | 2005-11-08 21:37:07 -0800 | [diff] [blame] | 815 | } |
| 816 | |
| 817 | if (dev->alt != prev_alt) { |
| 818 | dev->max_pkt_size = dev->alt_max_pkt_size[dev->alt]; |
| 819 | em2820_coredbg("setting alternate %d with wMaxPacketSize=%u", dev->alt, |
| 820 | dev->max_pkt_size); |
| 821 | errCode = usb_set_interface(dev->udev, 0, dev->alt); |
| 822 | if (errCode < 0) { |
| 823 | em2820_errdev |
| 824 | ("cannot change alternate number to %d (error=%i)\n", |
| 825 | dev->alt, errCode); |
| 826 | return errCode; |
| 827 | } |
| 828 | } |
| 829 | return 0; |
| 830 | } |