diff options
Diffstat (limited to 'drivers/media/video/em28xx/em28xx-core.c')
| -rw-r--r-- | drivers/media/video/em28xx/em28xx-core.c | 776 |
1 files changed, 329 insertions, 447 deletions
diff --git a/drivers/media/video/em28xx/em28xx-core.c b/drivers/media/video/em28xx/em28xx-core.c index c1caaa855b9..f8c41d8c74c 100644 --- a/drivers/media/video/em28xx/em28xx-core.c +++ b/drivers/media/video/em28xx/em28xx-core.c @@ -31,104 +31,33 @@ /* #define ENABLE_DEBUG_ISOC_FRAMES */ -static unsigned int core_debug = 0; +static unsigned int core_debug; module_param(core_debug,int,0644); MODULE_PARM_DESC(core_debug,"enable debug messages [core]"); #define em28xx_coredbg(fmt, arg...) do {\ if (core_debug) \ printk(KERN_INFO "%s %s :"fmt, \ - dev->name, __FUNCTION__ , ##arg); } while (0) + dev->name, __func__ , ##arg); } while (0) -static unsigned int reg_debug = 0; +static unsigned int reg_debug; module_param(reg_debug,int,0644); MODULE_PARM_DESC(reg_debug,"enable debug messages [URB reg]"); #define em28xx_regdbg(fmt, arg...) do {\ if (reg_debug) \ printk(KERN_INFO "%s %s :"fmt, \ - dev->name, __FUNCTION__ , ##arg); } while (0) - -static unsigned int isoc_debug = 0; -module_param(isoc_debug,int,0644); -MODULE_PARM_DESC(isoc_debug,"enable debug messages [isoc transfers]"); - -#define em28xx_isocdbg(fmt, arg...) do {\ - if (isoc_debug) \ - printk(KERN_INFO "%s %s :"fmt, \ - dev->name, __FUNCTION__ , ##arg); } while (0) + dev->name, __func__ , ##arg); } while (0) static int alt = EM28XX_PINOUT; module_param(alt, int, 0644); MODULE_PARM_DESC(alt, "alternate setting to use for video endpoint"); - -/* - * em28xx_request_buffers() - * allocate a number of buffers - */ -u32 em28xx_request_buffers(struct em28xx *dev, u32 count) -{ - const size_t imagesize = PAGE_ALIGN(dev->frame_size); /*needs to be page aligned cause the buffers can be mapped individually! */ - void *buff = NULL; - u32 i; - em28xx_coredbg("requested %i buffers with size %zi\n", - count, imagesize); - if (count > EM28XX_NUM_FRAMES) - count = EM28XX_NUM_FRAMES; - - dev->num_frames = count; - while (dev->num_frames > 0) { - if ((buff = vmalloc_32(dev->num_frames * imagesize))) { - memset(buff, 0, dev->num_frames * imagesize); - break; - } - dev->num_frames--; - } - - for (i = 0; i < dev->num_frames; i++) { - dev->frame[i].bufmem = buff + i * imagesize; - dev->frame[i].buf.index = i; - dev->frame[i].buf.m.offset = i * imagesize; - dev->frame[i].buf.length = dev->frame_size; - dev->frame[i].buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - dev->frame[i].buf.sequence = 0; - dev->frame[i].buf.field = V4L2_FIELD_NONE; - dev->frame[i].buf.memory = V4L2_MEMORY_MMAP; - dev->frame[i].buf.flags = 0; - } - return dev->num_frames; -} - -/* - * em28xx_queue_unusedframes() - * add all frames that are not currently in use to the inbuffer queue - */ -void em28xx_queue_unusedframes(struct em28xx *dev) -{ - unsigned long lock_flags; - u32 i; - - for (i = 0; i < dev->num_frames; i++) - if (dev->frame[i].state == F_UNUSED) { - dev->frame[i].state = F_QUEUED; - spin_lock_irqsave(&dev->queue_lock, lock_flags); - list_add_tail(&dev->frame[i].frame, &dev->inqueue); - spin_unlock_irqrestore(&dev->queue_lock, lock_flags); - } -} - -/* - * em28xx_release_buffers() - * free frame buffers - */ -void em28xx_release_buffers(struct em28xx *dev) -{ - if (dev->num_frames) { - vfree(dev->frame[0].bufmem); - dev->num_frames = 0; - } -} +/* FIXME */ +#define em28xx_isocdbg(fmt, arg...) do {\ + if (core_debug) \ + printk(KERN_INFO "%s %s :"fmt, \ + dev->name, __func__ , ##arg); } while (0) /* * em28xx_read_reg_req() @@ -148,11 +77,11 @@ int em28xx_read_reg_req_len(struct em28xx *dev, u8 req, u16 reg, USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 0x0000, reg, buf, len, HZ); - if (reg_debug){ + if (reg_debug) { printk(ret < 0 ? " failed!\n" : "%02x values: ", ret); - for (byte = 0; byte < len; byte++) { + for (byte = 0; byte < len; byte++) printk(" %02x", (unsigned char)buf[byte]); - } + printk("\n"); } @@ -205,7 +134,10 @@ int em28xx_write_regs_req(struct em28xx *dev, u8 req, u16 reg, char *buf, unsigned char *bufs; if (dev->state & DEV_DISCONNECTED) - return(-ENODEV); + return -ENODEV; + + if (len < 1) + return -EINVAL; bufs = kmalloc(len, GFP_KERNEL); @@ -214,8 +146,8 @@ int em28xx_write_regs_req(struct em28xx *dev, u8 req, u16 reg, char *buf, if (reg_debug) { int i; for (i = 0; i < len; ++i) - printk (" %02x", (unsigned char)buf[i]); - printk ("\n"); + printk(" %02x", (unsigned char)buf[i]); + printk("\n"); } if (!bufs) @@ -224,14 +156,32 @@ int em28xx_write_regs_req(struct em28xx *dev, u8 req, u16 reg, char *buf, ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0), req, USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 0x0000, reg, bufs, len, HZ); - msleep(5); /* FIXME: magic number */ + if (dev->wait_after_write) + msleep(dev->wait_after_write); + kfree(bufs); return ret; } int em28xx_write_regs(struct em28xx *dev, u16 reg, char *buf, int len) { - return em28xx_write_regs_req(dev, USB_REQ_GET_STATUS, reg, buf, len); + int rc; + + rc = em28xx_write_regs_req(dev, USB_REQ_GET_STATUS, reg, buf, len); + + /* Stores GPO/GPIO values at the cache, if changed + Only write values should be stored, since input on a GPIO + register will return the input bits. + Not sure what happens on reading GPO register. + */ + if (rc >= 0) { + if (reg == EM2880_R04_GPO) + dev->reg_gpo = buf[0]; + else if (reg == EM28XX_R08_GPIO) + dev->reg_gpio = buf[0]; + } + + return rc; } /* @@ -244,9 +194,20 @@ static int em28xx_write_reg_bits(struct em28xx *dev, u16 reg, u8 val, { int oldval; u8 newval; - if ((oldval = em28xx_read_reg(dev, reg)) < 0) + + /* Uses cache for gpo/gpio registers */ + if (reg == EM2880_R04_GPO) + oldval = dev->reg_gpo; + else if (reg == EM28XX_R08_GPIO) + oldval = dev->reg_gpio; + else + oldval = em28xx_read_reg(dev, reg); + + if (oldval < 0) return oldval; + newval = (((u8) oldval) & ~bitmask) | (val & bitmask); + return em28xx_write_regs(dev, reg, &newval, 1); } @@ -258,20 +219,26 @@ static int em28xx_write_ac97(struct em28xx *dev, u8 reg, u8 *val) { int ret, i; u8 addr = reg & 0x7f; - if ((ret = em28xx_write_regs(dev, AC97LSB_REG, val, 2)) < 0) + + ret = em28xx_write_regs(dev, EM28XX_R40_AC97LSB, val, 2); + if (ret < 0) return ret; - if ((ret = em28xx_write_regs(dev, AC97ADDR_REG, &addr, 1)) < 0) + + ret = em28xx_write_regs(dev, EM28XX_R42_AC97ADDR, &addr, 1); + if (ret < 0) return ret; /* Wait up to 50 ms for AC97 command to complete */ for (i = 0; i < 10; i++) { - if ((ret = em28xx_read_reg(dev, AC97BUSY_REG)) < 0) + ret = em28xx_read_reg(dev, EM28XX_R43_AC97BUSY); + if (ret < 0) return ret; + if (!(ret & 0x01)) return 0; msleep(5); } - em28xx_warn ("AC97 command still being executed: not handled properly!\n"); + em28xx_warn("AC97 command still being executed: not handled properly!\n"); return 0; } @@ -289,7 +256,7 @@ static int em28xx_set_audio_source(struct em28xx *dev) else input = EM2800_AUDIO_SRC_TUNER; - ret = em28xx_write_regs(dev, EM2800_AUDIOSRC_REG, &input, 1); + ret = em28xx_write_regs(dev, EM2800_R08_AUDIOSRC, &input, 1); if (ret < 0) return ret; } @@ -315,7 +282,7 @@ static int em28xx_set_audio_source(struct em28xx *dev) } } - ret = em28xx_write_reg_bits(dev, AUDIOSRC_REG, input, 0xc0); + ret = em28xx_write_reg_bits(dev, EM28XX_R0E_AUDIOSRC, input, 0xc0); if (ret < 0) return ret; msleep(5); @@ -323,11 +290,11 @@ static int em28xx_set_audio_source(struct em28xx *dev) /* Sets AC97 mixer registers This is seems to be needed, even for non-ac97 configs */ - ret = em28xx_write_ac97(dev, VIDEO_AC97, video); + ret = em28xx_write_ac97(dev, EM28XX_R14_VIDEO_AC97, video); if (ret < 0) return ret; - ret = em28xx_write_ac97(dev, LINE_IN_AC97, line); + ret = em28xx_write_ac97(dev, EM28XX_R10_LINE_IN_AC97, line); return ret; } @@ -343,7 +310,7 @@ int em28xx_audio_analog_set(struct em28xx *dev) /* Mute */ s[1] |= 0x80; - ret = em28xx_write_ac97(dev, MASTER_AC97, s); + ret = em28xx_write_ac97(dev, EM28XX_R02_MASTER_AC97, s); if (ret < 0) return ret; @@ -354,7 +321,7 @@ int em28xx_audio_analog_set(struct em28xx *dev) if (!dev->mute) xclk |= 0x80; - ret = em28xx_write_reg_bits(dev, XCLK_REG, xclk, 0xa7); + ret = em28xx_write_reg_bits(dev, EM28XX_R0F_XCLK, xclk, 0xa7); if (ret < 0) return ret; msleep(10); @@ -365,7 +332,7 @@ int em28xx_audio_analog_set(struct em28xx *dev) /* Unmute device */ if (!dev->mute) s[1] &= ~0x80; - ret = em28xx_write_ac97(dev, MASTER_AC97, s); + ret = em28xx_write_ac97(dev, EM28XX_R02_MASTER_AC97, s); return ret; } @@ -373,50 +340,68 @@ EXPORT_SYMBOL_GPL(em28xx_audio_analog_set); int em28xx_colorlevels_set_default(struct em28xx *dev) { - em28xx_write_regs(dev, YGAIN_REG, "\x10", 1); /* contrast */ - em28xx_write_regs(dev, YOFFSET_REG, "\x00", 1); /* brightness */ - em28xx_write_regs(dev, UVGAIN_REG, "\x10", 1); /* saturation */ - em28xx_write_regs(dev, UOFFSET_REG, "\x00", 1); - em28xx_write_regs(dev, VOFFSET_REG, "\x00", 1); - em28xx_write_regs(dev, SHARPNESS_REG, "\x00", 1); - - em28xx_write_regs(dev, GAMMA_REG, "\x20", 1); - em28xx_write_regs(dev, RGAIN_REG, "\x20", 1); - em28xx_write_regs(dev, GGAIN_REG, "\x20", 1); - em28xx_write_regs(dev, BGAIN_REG, "\x20", 1); - em28xx_write_regs(dev, ROFFSET_REG, "\x00", 1); - em28xx_write_regs(dev, GOFFSET_REG, "\x00", 1); - return em28xx_write_regs(dev, BOFFSET_REG, "\x00", 1); + em28xx_write_regs(dev, EM28XX_R20_YGAIN, "\x10", 1); /* contrast */ + em28xx_write_regs(dev, EM28XX_R21_YOFFSET, "\x00", 1); /* brightness */ + em28xx_write_regs(dev, EM28XX_R22_UVGAIN, "\x10", 1); /* saturation */ + em28xx_write_regs(dev, EM28XX_R23_UOFFSET, "\x00", 1); + em28xx_write_regs(dev, EM28XX_R24_VOFFSET, "\x00", 1); + em28xx_write_regs(dev, EM28XX_R25_SHARPNESS, "\x00", 1); + + em28xx_write_regs(dev, EM28XX_R14_GAMMA, "\x20", 1); + em28xx_write_regs(dev, EM28XX_R15_RGAIN, "\x20", 1); + em28xx_write_regs(dev, EM28XX_R16_GGAIN, "\x20", 1); + em28xx_write_regs(dev, EM28XX_R17_BGAIN, "\x20", 1); + em28xx_write_regs(dev, EM28XX_R18_ROFFSET, "\x00", 1); + em28xx_write_regs(dev, EM28XX_R19_GOFFSET, "\x00", 1); + return em28xx_write_regs(dev, EM28XX_R1A_BOFFSET, "\x00", 1); } int em28xx_capture_start(struct em28xx *dev, int start) { - int ret; + int rc; /* FIXME: which is the best order? */ /* video registers are sampled by VREF */ - if ((ret = em28xx_write_reg_bits(dev, USBSUSP_REG, start ? 0x10 : 0x00, - 0x10)) < 0) - return ret; + rc = em28xx_write_reg_bits(dev, EM28XX_R0C_USBSUSP, + start ? 0x10 : 0x00, 0x10); + if (rc < 0) + return rc; + + if (!start) { + /* disable video capture */ + rc = em28xx_write_regs(dev, EM28XX_R12_VINENABLE, "\x27", 1); + return rc; + } + /* enable video capture */ - return em28xx_write_regs(dev, VINENABLE_REG, start ? "\x67" : "\x27", 1); + rc = em28xx_write_regs_req(dev, 0x00, 0x48, "\x00", 1); + + if (dev->mode == EM28XX_ANALOG_MODE) + rc = em28xx_write_regs(dev, EM28XX_R12_VINENABLE, "\x67", 1); + else + rc = em28xx_write_regs(dev, EM28XX_R12_VINENABLE, "\x37", 1); + + msleep(6); + + return rc; } int em28xx_outfmt_set_yuv422(struct em28xx *dev) { - em28xx_write_regs(dev, OUTFMT_REG, "\x34", 1); - em28xx_write_regs(dev, VINMODE_REG, "\x10", 1); - return em28xx_write_regs(dev, VINCTRL_REG, "\x11", 1); + em28xx_write_regs(dev, EM28XX_R27_OUTFMT, "\x34", 1); + em28xx_write_regs(dev, EM28XX_R10_VINMODE, "\x10", 1); + return em28xx_write_regs(dev, EM28XX_R11_VINCTRL, "\x11", 1); } static int em28xx_accumulator_set(struct em28xx *dev, u8 xmin, u8 xmax, u8 ymin, u8 ymax) { - em28xx_coredbg("em28xx Scale: (%d,%d)-(%d,%d)\n", xmin, ymin, xmax, ymax); + em28xx_coredbg("em28xx Scale: (%d,%d)-(%d,%d)\n", + xmin, ymin, xmax, ymax); - em28xx_write_regs(dev, XMIN_REG, &xmin, 1); - em28xx_write_regs(dev, XMAX_REG, &xmax, 1); - em28xx_write_regs(dev, YMIN_REG, &ymin, 1); - return em28xx_write_regs(dev, YMAX_REG, &ymax, 1); + em28xx_write_regs(dev, EM28XX_R28_XMIN, &xmin, 1); + em28xx_write_regs(dev, EM28XX_R29_XMAX, &xmax, 1); + em28xx_write_regs(dev, EM28XX_R2A_YMIN, &ymin, 1); + return em28xx_write_regs(dev, EM28XX_R2B_YMAX, &ymax, 1); } static int em28xx_capture_area_set(struct em28xx *dev, u8 hstart, u8 vstart, @@ -426,34 +411,36 @@ static int em28xx_capture_area_set(struct em28xx *dev, u8 hstart, u8 vstart, u8 cheight = height; u8 overflow = (height >> 7 & 0x02) | (width >> 8 & 0x01); - em28xx_coredbg("em28xx Area Set: (%d,%d)\n", (width | (overflow & 2) << 7), + em28xx_coredbg("em28xx Area Set: (%d,%d)\n", + (width | (overflow & 2) << 7), (height | (overflow & 1) << 8)); - em28xx_write_regs(dev, HSTART_REG, &hstart, 1); - em28xx_write_regs(dev, VSTART_REG, &vstart, 1); - em28xx_write_regs(dev, CWIDTH_REG, &cwidth, 1); - em28xx_write_regs(dev, CHEIGHT_REG, &cheight, 1); - return em28xx_write_regs(dev, OFLOW_REG, &overflow, 1); + em28xx_write_regs(dev, EM28XX_R1C_HSTART, &hstart, 1); + em28xx_write_regs(dev, EM28XX_R1D_VSTART, &vstart, 1); + em28xx_write_regs(dev, EM28XX_R1E_CWIDTH, &cwidth, 1); + em28xx_write_regs(dev, EM28XX_R1F_CHEIGHT, &cheight, 1); + return em28xx_write_regs(dev, EM28XX_R1B_OFLOW, &overflow, 1); } static int em28xx_scaler_set(struct em28xx *dev, u16 h, u16 v) { u8 mode; /* the em2800 scaler only supports scaling down to 50% */ - if(dev->is_em2800) + if (dev->is_em2800) mode = (v ? 0x20 : 0x00) | (h ? 0x10 : 0x00); else { u8 buf[2]; buf[0] = h; buf[1] = h >> 8; - em28xx_write_regs(dev, HSCALELOW_REG, (char *)buf, 2); + em28xx_write_regs(dev, EM28XX_R30_HSCALELOW, (char *)buf, 2); buf[0] = v; buf[1] = v >> 8; - em28xx_write_regs(dev, VSCALELOW_REG, (char *)buf, 2); - /* it seems that both H and V scalers must be active to work correctly */ + em28xx_write_regs(dev, EM28XX_R32_VSCALELOW, (char *)buf, 2); + /* it seems that both H and V scalers must be active + to work correctly */ mode = (h || v)? 0x30: 0x00; } - return em28xx_write_reg_bits(dev, COMPR_REG, mode, 0x30); + return em28xx_write_reg_bits(dev, EM28XX_R26_COMPR, mode, 0x30); } /* FIXME: this only function read values from dev */ @@ -469,376 +456,271 @@ int em28xx_resolution_set(struct em28xx *dev) return em28xx_scaler_set(dev, dev->hscale, dev->vscale); } - -/******************* isoc transfer handling ****************************/ - -#ifdef ENABLE_DEBUG_ISOC_FRAMES -static void em28xx_isoc_dump(struct urb *urb) +int em28xx_set_alternate(struct em28xx *dev) { - int len = 0; - int ntrans = 0; + int errCode, prev_alt = dev->alt; int i; + unsigned int min_pkt_size = dev->width * 2 + 4; - printk(KERN_DEBUG "isocIrq: sf=%d np=%d ec=%x\n", - urb->start_frame, urb->number_of_packets, - urb->error_count); - for (i = 0; i < urb->number_of_packets; i++) { - unsigned char *buf = - urb->transfer_buffer + - urb->iso_frame_desc[i].offset; - int alen = urb->iso_frame_desc[i].actual_length; - if (alen > 0) { - if (buf[0] == 0x88) { - ntrans++; - len += alen; - } else if (buf[0] == 0x22) { - printk(KERN_DEBUG - "= l=%d nt=%d bpp=%d\n", - len - 4 * ntrans, ntrans, - ntrans == 0 ? 0 : len / ntrans); - ntrans = 1; - len = alen; - } else - printk(KERN_DEBUG "!\n"); + /* When image size is bigger than a certain value, + the frame size should be increased, otherwise, only + green screen will be received. + */ + if (dev->width * 2 * dev->height > 720 * 240 * 2) + min_pkt_size *= 2; + + for (i = 0; i < dev->num_alt; i++) { + /* stop when the selected alt setting offers enough bandwidth */ + if (dev->alt_max_pkt_size[i] >= min_pkt_size) { + dev->alt = i; + break; + /* otherwise make sure that we end up with the maximum bandwidth + because the min_pkt_size equation might be wrong... + */ + } else if (dev->alt_max_pkt_size[i] > + dev->alt_max_pkt_size[dev->alt]) + dev->alt = i; + } + + if (dev->alt != prev_alt) { + em28xx_coredbg("minimum isoc packet size: %u (alt=%d)\n", + min_pkt_size, dev->alt); + dev->max_pkt_size = dev->alt_max_pkt_size[dev->alt]; + em28xx_coredbg("setting alternate %d with wMaxPacketSize=%u\n", + dev->alt, dev->max_pkt_size); + errCode = usb_set_interface(dev->udev, 0, dev->alt); + if (errCode < 0) { + em28xx_errdev("cannot change alternate number to %d (error=%i)\n", + dev->alt, errCode); + return errCode; } - printk(KERN_DEBUG " n=%d s=%d al=%d %x\n", i, - urb->iso_frame_desc[i].status, - urb->iso_frame_desc[i].actual_length, - (unsigned int) - *((unsigned char *)(urb->transfer_buffer + - urb->iso_frame_desc[i]. - offset))); } + return 0; } -#endif -static inline int em28xx_isoc_video(struct em28xx *dev,struct em28xx_frame_t **f, - unsigned long *lock_flags, unsigned char buf) +int em28xx_gpio_set(struct em28xx *dev, struct em28xx_reg_seq *gpio) { - if (!(buf & 0x01)) { - if ((*f)->state == F_GRABBING) { - /*previous frame is incomplete */ - if ((*f)->fieldbytesused < dev->field_size) { - (*f)->state = F_ERROR; - em28xx_isocdbg ("dropping incomplete bottom field (%i missing bytes)", - dev->field_size-(*f)->fieldbytesused); - } else { - (*f)->state = F_DONE; - (*f)->buf.bytesused = dev->frame_size; - } - } - if ((*f)->state == F_DONE || (*f)->state == F_ERROR) { - /* move current frame to outqueue and get next free buffer from inqueue */ - spin_lock_irqsave(&dev-> queue_lock, *lock_flags); - list_move_tail(&(*f)->frame, &dev->outqueue); - if (!list_empty(&dev->inqueue)) - (*f) = list_entry(dev-> inqueue.next, - struct em28xx_frame_t,frame); - else - (*f) = NULL; - spin_unlock_irqrestore(&dev->queue_lock,*lock_flags); - } - if (!(*f)) { - em28xx_isocdbg ("new frame but no buffer is free"); - return -1; - } - do_gettimeofday(&(*f)->buf.timestamp); - (*f)->buf.sequence = ++dev->frame_count; - (*f)->buf.field = V4L2_FIELD_INTERLACED; - (*f)->state = F_GRABBING; - (*f)->buf.bytesused = 0; - (*f)->top_field = 1; - (*f)->fieldbytesused = 0; - } else { - /* acquiring bottom field */ - if ((*f)->state == F_GRABBING) { - if (!(*f)->top_field) { - (*f)->state = F_ERROR; - em28xx_isocdbg ("unexpected begin of bottom field; discarding it"); - } else if ((*f)-> fieldbytesused < dev->field_size - 172) { - (*f)->state = F_ERROR; - em28xx_isocdbg ("dropping incomplete top field (%i missing bytes)", - dev->field_size-(*f)->fieldbytesused); - } else { - (*f)->top_field = 0; - (*f)->fieldbytesused = 0; - } + int rc = 0; + + if (!gpio) + return rc; + + dev->em28xx_write_regs_req(dev, 0x00, 0x48, "\x00", 1); + if (dev->mode == EM28XX_ANALOG_MODE) + dev->em28xx_write_regs_req(dev, 0x00, 0x12, "\x67", 1); + else + dev->em28xx_write_regs_req(dev, 0x00, 0x12, "\x37", 1); + msleep(6); + + /* Send GPIO reset sequences specified at board entry */ + while (gpio->sleep >= 0) { + if (gpio->reg >= 0) { + rc = em28xx_write_reg_bits(dev, + gpio->reg, + gpio->val, + gpio->mask); + if (rc < 0) + return rc; } + if (gpio->sleep > 0) + msleep(gpio->sleep); + + gpio++; } - return (0); + return rc; } -static inline void em28xx_isoc_video_copy(struct em28xx *dev, - struct em28xx_frame_t **f, unsigned char *buf, int len) +int em28xx_set_mode(struct em28xx *dev, enum em28xx_mode set_mode) { - void *fieldstart, *startwrite, *startread; - int linesdone, currlinedone, offset, lencopy,remain; + if (dev->mode == set_mode) + return 0; - if(dev->frame_size != (*f)->buf.length){ - em28xx_err("frame_size %i and buf.length %i are different!!!\n",dev->frame_size,(*f)->buf.length); - return; + if (set_mode == EM28XX_MODE_UNDEFINED) { + dev->mode = set_mode; + return 0; } - if ((*f)->fieldbytesused + len > dev->field_size) - len =dev->field_size - (*f)->fieldbytesused; - - if (buf[0] != 0x88 && buf[0] != 0x22) { - em28xx_isocdbg("frame is not complete\n"); - startread = buf; - len+=4; - } else - startread = buf + 4; - - remain = len; + dev->mode = set_mode; - if ((*f)->top_field) - fieldstart = (*f)->bufmem; + if (dev->mode == EM28XX_DIGITAL_MODE) + return em28xx_gpio_set(dev, dev->digital_gpio); else - fieldstart = (*f)->bufmem + dev->bytesperline; - - linesdone = (*f)->fieldbytesused / dev->bytesperline; - currlinedone = (*f)->fieldbytesused % dev->bytesperline; - offset = linesdone * dev->bytesperline * 2 + currlinedone; - startwrite = fieldstart + offset; - lencopy = dev->bytesperline - currlinedone; - lencopy = lencopy > remain ? remain : lencopy; - - memcpy(startwrite, startread, lencopy); - remain -= lencopy; - - while (remain > 0) { - startwrite += lencopy + dev->bytesperline; - startread += lencopy; - if (dev->bytesperline > remain) - lencopy = remain; - else - lencopy = dev->bytesperline; - - memcpy(startwrite, startread, lencopy); - remain -= lencopy; - } - - (*f)->fieldbytesused += len; + return em28xx_gpio_set(dev, dev->analog_gpio); } +EXPORT_SYMBOL_GPL(em28xx_set_mode); + +/* ------------------------------------------------------------------ + URB control + ------------------------------------------------------------------*/ /* - * em28xx_isoIrq() - * handles the incoming isoc urbs and fills the frames from our inqueue + * IRQ callback, called by URB callback */ -static void em28xx_isocIrq(struct urb *urb) +static void em28xx_irq_callback(struct urb *urb) { - struct em28xx *dev = urb->context; - int i, status; - struct em28xx_frame_t **f; - unsigned long lock_flags; - - if (!dev) - return; -#ifdef ENABLE_DEBUG_ISOC_FRAMES - if (isoc_debug>1) - em28xx_isoc_dump(urb); -#endif - - if (urb->status == -ENOENT) - return; - - f = &dev->frame_current; - - if (dev->stream == STREAM_INTERRUPT) { - dev->stream = STREAM_OFF; - if ((*f)) - (*f)->state = F_QUEUED; - em28xx_isocdbg("stream interrupted"); - wake_up_interruptible(&dev->wait_stream); - } - - if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED)) - return; - - if (dev->stream == STREAM_ON && !list_empty(&dev->inqueue)) { - if (!(*f)) - (*f) = list_entry(dev->inqueue.next, - struct em28xx_frame_t, frame); - - for (i = 0; i < urb->number_of_packets; i++) { - unsigned char *buf = urb->transfer_buffer + - urb->iso_frame_desc[i].offset; - int len = urb->iso_frame_desc[i].actual_length - 4; - - if (urb->iso_frame_desc[i].status) { - em28xx_isocdbg("data error: [%d] len=%d, status=%d", i, - urb->iso_frame_desc[i].actual_length, - urb->iso_frame_desc[i].status); - if (urb->iso_frame_desc[i].status != -EPROTO) - continue; - } - if (urb->iso_frame_desc[i].actual_length <= 0) { - em28xx_isocdbg("packet %d is empty",i); - continue; - } - if (urb->iso_frame_desc[i].actual_length > - urb->iso_frame_desc[i].length) { - em28xx_isocdbg("packet bigger than packet size"); - continue; - } - /*new frame */ - if (buf[0] == 0x22 && buf[1] == 0x5a) { - em28xx_isocdbg("Video frame, length=%i!",len); - - if (em28xx_isoc_video(dev,f,&lock_flags,buf[2])) - break; - } else if (buf[0]==0x33 && buf[1]==0x95 && buf[2]==0x00) { - em28xx_isocdbg("VBI HEADER!!!"); - } + struct em28xx_dmaqueue *dma_q = urb->context; + struct em28xx *dev = container_of(dma_q, struct em28xx, vidq); + int rc, i; - /* actual copying */ - if ((*f)->state == F_GRABBING) { - em28xx_isoc_video_copy(dev,f,buf, len); - } - } - } + /* Copy data from URB */ + spin_lock(&dev->slock); + rc = dev->isoc_ctl.isoc_copy(dev, urb); + spin_unlock(&dev->slock); + /* Reset urb buffers */ for (i = 0; i < urb->number_of_packets; i++) { urb->iso_frame_desc[i].status = 0; urb->iso_frame_desc[i].actual_length = 0; } - urb->status = 0; - if ((status = usb_submit_urb(urb, GFP_ATOMIC))) { - em28xx_errdev("resubmit of urb failed (error=%i)\n", status); - dev->state |= DEV_MISCONFIGURED; + + urb->status = usb_submit_urb(urb, GFP_ATOMIC); + if (urb->status) { + em28xx_isocdbg("urb resubmit failed (error=%i)\n", + urb->status); } - wake_up_interruptible(&dev->wait_frame); - return; } /* - * em28xx_uninit_isoc() - * deallocates the buffers and urbs allocated during em28xx_init_iosc() + * Stop and Deallocate URBs */ void em28xx_uninit_isoc(struct em28xx *dev) { + struct urb *urb; int i; - for (i = 0; i < EM28XX_NUM_BUFS; i++) { - if (dev->urb[i]) { - usb_kill_urb(dev->urb[i]); - if (dev->transfer_buffer[i]) { + em28xx_isocdbg("em28xx: called em28xx_uninit_isoc\n"); + + dev->isoc_ctl.nfields = -1; + for (i = 0; i < dev->isoc_ctl.num_bufs; i++) { + urb = dev->isoc_ctl.urb[i]; + if (urb) { + usb_kill_urb(urb); + usb_unlink_urb(urb); + if (dev->isoc_ctl.transfer_buffer[i]) { usb_buffer_free(dev->udev, - dev->urb[i]->transfer_buffer_length, - dev->transfer_buffer[i], - dev->urb[i]->transfer_dma); + urb->transfer_buffer_length, + dev->isoc_ctl.transfer_buffer[i], + urb->transfer_dma); } - usb_free_urb(dev->urb[i]); + usb_free_urb(urb); + dev->isoc_ctl.urb[i] = NULL; } - dev->urb[i] = NULL; - dev->transfer_buffer[i] = NULL; + dev->isoc_ctl.transfer_buffer[i] = NULL; } + + kfree(dev->isoc_ctl.urb); + kfree(dev->isoc_ctl.transfer_buffer); + + dev->isoc_ctl.urb = NULL; + dev->isoc_ctl.transfer_buffer = NULL; + dev->isoc_ctl.num_bufs = 0; + em28xx_capture_start(dev, 0); } +EXPORT_SYMBOL_GPL(em28xx_uninit_isoc); /* - * em28xx_init_isoc() - * allocates transfer buffers and submits the urbs for isoc transfer + * Allocate URBs and start IRQ */ -int em28xx_init_isoc(struct em28xx *dev) +int em28xx_init_isoc(struct em28xx *dev, int max_packets, + int num_bufs, int max_pkt_size, + int (*isoc_copy) (struct em28xx *dev, struct urb *urb)) { - /* change interface to 3 which allows the biggest packet sizes */ - int i, errCode; - int sb_size; - - em28xx_set_alternate(dev); - sb_size = EM28XX_NUM_PACKETS * dev->max_pkt_size; - - /* reset streaming vars */ - dev->frame_current = NULL; - dev->frame_count = 0; - - /* allocate urbs */ - for (i = 0; i < EM28XX_NUM_BUFS; i++) { - struct urb *urb; - int j; - /* allocate transfer buffer */ - urb = usb_alloc_urb(EM28XX_NUM_PACKETS, GFP_KERNEL); - if (!urb){ - em28xx_errdev("cannot alloc urb %i\n", i); + struct em28xx_dmaqueue *dma_q = &dev->vidq; + int i; + int sb_size, pipe; + struct urb *urb; + int j, k; + int rc; + + em28xx_isocdbg("em28xx: called em28xx_prepare_isoc\n"); + + /* De-allocates all pending stuff */ + em28xx_uninit_isoc(dev); + + dev->isoc_ctl.isoc_copy = isoc_copy; + dev->isoc_ctl.num_bufs = num_bufs; + + dev->isoc_ctl.urb = kzalloc(sizeof(void *)*num_bufs, GFP_KERNEL); + if (!dev->isoc_ctl.urb) { + em28xx_errdev("cannot alloc memory for usb buffers\n"); + return -ENOMEM; + } + + dev->isoc_ctl.transfer_buffer = kzalloc(sizeof(void *)*num_bufs, + GFP_KERNEL); + if (!dev->isoc_ctl.urb) { + em28xx_errdev("cannot allocate memory for usbtransfer\n"); + kfree(dev->isoc_ctl.urb); + return -ENOMEM; + } + + dev->isoc_ctl.max_pkt_size = max_pkt_size; + dev->isoc_ctl.buf = NULL; + + sb_size = max_packets * dev->isoc_ctl.max_pkt_size; + + /* allocate urbs and transfer buffers */ + for (i = 0; i < dev->isoc_ctl.num_bufs; i++) { + urb = usb_alloc_urb(max_packets, GFP_KERNEL); + if (!urb) { + em28xx_err("cannot alloc isoc_ctl.urb %i\n", i); em28xx_uninit_isoc(dev); return -ENOMEM; } - dev->transfer_buffer[i] = usb_buffer_alloc(dev->udev, sb_size, - GFP_KERNEL, - &urb->transfer_dma); - if (!dev->transfer_buffer[i]) { - em28xx_errdev - ("unable to allocate %i bytes for transfer buffer %i\n", - sb_size, i); + dev->isoc_ctl.urb[i] = urb; + + dev->isoc_ctl.transfer_buffer[i] = usb_buffer_alloc(dev->udev, + sb_size, GFP_KERNEL, &urb->transfer_dma); + if (!dev->isoc_ctl.transfer_buffer[i]) { + em28xx_err("unable to allocate %i bytes for transfer" + " buffer %i%s\n", + sb_size, i, + in_interrupt()?" while in int":""); em28xx_uninit_isoc(dev); - usb_free_urb(urb); return -ENOMEM; } - memset(dev->transfer_buffer[i], 0, sb_size); - urb->dev = dev->udev; - urb->context = dev; - urb->pipe = usb_rcvisocpipe(dev->udev, 0x82); - urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP; - urb->interval = 1; - urb->transfer_buffer = dev->transfer_buffer[i]; - urb->complete = em28xx_isocIrq; - urb->number_of_packets = EM28XX_NUM_PACKETS; - urb->transfer_buffer_length = sb_size; - for (j = 0; j < EM28XX_NUM_PACKETS; j++) { - urb->iso_frame_desc[j].offset = j * dev->max_pkt_size; - urb->iso_frame_desc[j].length = dev->max_pkt_size; + memset(dev->isoc_ctl.transfer_buffer[i], 0, sb_size); + + /* FIXME: this is a hack - should be + 'desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK' + should also be using 'desc.bInterval' + */ + pipe = usb_rcvisocpipe(dev->udev, + dev->mode == EM28XX_ANALOG_MODE ? 0x82 : 0x84); + + usb_fill_int_urb(urb, dev->udev, pipe, + dev->isoc_ctl.transfer_buffer[i], sb_size, + em28xx_irq_callback, dma_q, 1); + + urb->number_of_packets = max_packets; + urb->transfer_flags = URB_ISO_ASAP; + + k = 0; + for (j = 0; j < max_packets; j++) { + urb->iso_frame_desc[j].offset = k; + urb->iso_frame_desc[j].length = + dev->isoc_ctl.max_pkt_size; + k += dev->isoc_ctl.max_pkt_size; } - dev->urb[i] = urb; } - /* submit urbs */ - em28xx_coredbg("Submitting %d urbs of %d packets (%d each)\n", - EM28XX_NUM_BUFS, EM28XX_NUM_PACKETS, dev->max_pkt_size); - for (i = 0; i < EM28XX_NUM_BUFS; i++) { - errCode = usb_submit_urb(dev->urb[i], GFP_KERNEL); - if (errCode) { - em28xx_errdev("submit of urb %i failed (error=%i)\n", i, - errCode); - em28xx_uninit_isoc(dev); - return errCode; - } - } - - return 0; -} - -int em28xx_set_alternate(struct em28xx *dev) -{ - int errCode, prev_alt = dev->alt; - int i; - unsigned int min_pkt_size = dev->bytesperline+4; - - /* When image size is bigger than a ceirtain value, - the frame size should be increased, otherwise, only - green screen will be received. - */ - if (dev->frame_size > 720*240*2) - min_pkt_size *= 2; + init_waitqueue_head(&dma_q->wq); - for (i = 0; i < dev->num_alt; i++) - if (dev->alt_max_pkt_size[i] >= min_pkt_size) - break; - dev->alt = i; + em28xx_capture_start(dev, 1); - if (dev->alt != prev_alt) { - em28xx_coredbg("minimum isoc packet size: %u (alt=%d)\n", - min_pkt_size, dev->alt); - dev->max_pkt_size = dev->alt_max_pkt_size[dev->alt]; - em28xx_coredbg("setting alternate %d with wMaxPacketSize=%u\n", - dev->alt, dev->max_pkt_size); - errCode = usb_set_interface(dev->udev, 0, dev->alt); - if (errCode < 0) { - em28xx_errdev ("cannot change alternate number to %d (error=%i)\n", - dev->alt, errCode); - return errCode; + /* submit urbs and enables IRQ */ + for (i = 0; i < dev->isoc_ctl.num_bufs; i++) { + rc = usb_submit_urb(dev->isoc_ctl.urb[i], GFP_ATOMIC); + if (rc) { + em28xx_err("submit of urb %i failed (error=%i)\n", i, + rc); + em28xx_uninit_isoc(dev); + return rc; } } + return 0; } +EXPORT_SYMBOL_GPL(em28xx_init_isoc); |