diff options
Diffstat (limited to 'drivers/media/video/em28xx/em28xx-core.c')
| -rw-r--r-- | drivers/media/video/em28xx/em28xx-core.c | 724 |
1 files changed, 0 insertions, 724 deletions
diff --git a/drivers/media/video/em28xx/em28xx-core.c b/drivers/media/video/em28xx/em28xx-core.c deleted file mode 100644 index dff3893f32f..00000000000 --- a/drivers/media/video/em28xx/em28xx-core.c +++ /dev/null @@ -1,724 +0,0 @@ -/* - em28xx-core.c - driver for Empia EM2800/EM2820/2840 USB video capture devices - - Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it> - Markus Rechberger <mrechberger@gmail.com> - Mauro Carvalho Chehab <mchehab@brturbo.com.br> - Sascha Sommer <saschasommer@freenet.de> - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - */ - -#include <linux/init.h> -#include <linux/list.h> -#include <linux/module.h> -#include <linux/moduleparam.h> -#include <linux/usb.h> -#include <linux/vmalloc.h> - -#include "em28xx.h" - -/* #define ENABLE_DEBUG_ISOC_FRAMES */ - -static unsigned int core_debug = 0; -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) - -static unsigned int reg_debug = 0; -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) - -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", 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; - } -} - -/* - * em28xx_read_reg_req() - * reads data from the usb device specifying bRequest - */ -int em28xx_read_reg_req_len(struct em28xx *dev, u8 req, u16 reg, - char *buf, int len) -{ - int ret, byte; - - em28xx_regdbg("req=%02x, reg=%02x ", req, reg); - - ret = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0), req, - USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, - 0x0000, reg, buf, len, HZ); - - if (reg_debug){ - printk(ret < 0 ? " failed!\n" : "%02x values: ", ret); - for (byte = 0; byte < len; byte++) { - printk(" %02x", buf[byte]); - } - printk("\n"); - } - - return ret; -} - -/* - * em28xx_read_reg_req() - * reads data from the usb device specifying bRequest - */ -int em28xx_read_reg_req(struct em28xx *dev, u8 req, u16 reg) -{ - u8 val; - int ret; - - em28xx_regdbg("req=%02x, reg=%02x:", req, reg); - - ret = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0), req, - USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, - 0x0000, reg, &val, 1, HZ); - - if (reg_debug) - printk(ret < 0 ? " failed!\n" : "%02x\n", val); - - if (ret < 0) - return ret; - - return val; -} - -int em28xx_read_reg(struct em28xx *dev, u16 reg) -{ - return em28xx_read_reg_req(dev, USB_REQ_GET_STATUS, reg); -} - -/* - * em28xx_write_regs_req() - * sends data to the usb device, specifying bRequest - */ -int em28xx_write_regs_req(struct em28xx *dev, u8 req, u16 reg, char *buf, - int len) -{ - int ret; - - /*usb_control_msg seems to expect a kmalloced buffer */ - unsigned char *bufs = kmalloc(len, GFP_KERNEL); - - em28xx_regdbg("req=%02x reg=%02x:", req, reg); - - if (reg_debug) { - int i; - for (i = 0; i < len; ++i) - printk (" %02x", (unsigned char)buf[i]); - printk ("\n"); - } - - if (!bufs) - return -ENOMEM; - memcpy(bufs, buf, len); - 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); - mdelay(5); /* FIXME: magic number */ - 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); -} - -/* - * em28xx_write_reg_bits() - * sets only some bits (specified by bitmask) of a register, by first reading - * the actual value - */ -int em28xx_write_reg_bits(struct em28xx *dev, u16 reg, u8 val, - u8 bitmask) -{ - int oldval; - u8 newval; - if ((oldval = em28xx_read_reg(dev, reg)) < 0) - return oldval; - newval = (((u8) oldval) & ~bitmask) | (val & bitmask); - return em28xx_write_regs(dev, reg, &newval, 1); -} - -/* - * em28xx_write_ac97() - * write a 16 bit value to the specified AC97 address (LSB first!) - */ -int em28xx_write_ac97(struct em28xx *dev, u8 reg, u8 * val) -{ - int ret; - u8 addr = reg & 0x7f; - if ((ret = em28xx_write_regs(dev, AC97LSB_REG, val, 2)) < 0) - return ret; - if ((ret = em28xx_write_regs(dev, AC97ADDR_REG, &addr, 1)) < 0) - return ret; - if ((ret = em28xx_read_reg(dev, AC97BUSY_REG)) < 0) - return ret; - else if (((u8) ret) & 0x01) { - em28xx_warn ("AC97 command still being exectuted: not handled properly!\n"); - } - return 0; -} - -int em28xx_audio_analog_set(struct em28xx *dev) -{ - char s[2] = { 0x00, 0x00 }; - s[0] |= 0x1f - dev->volume; - s[1] |= 0x1f - dev->volume; - if (dev->mute) - s[1] |= 0x80; - return em28xx_write_ac97(dev, MASTER_AC97, s); -} - - -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); -} - -int em28xx_capture_start(struct em28xx *dev, int start) -{ - int ret; - /* 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; - /* enable video capture */ - return em28xx_write_regs(dev, VINENABLE_REG, start ? "\x67" : "\x27", 1); -} - -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); -} - -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_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); -} - -int em28xx_capture_area_set(struct em28xx *dev, u8 hstart, u8 vstart, - u16 width, u16 height) -{ - u8 cwidth = width; - u8 cheight = height; - u8 overflow = (height >> 7 & 0x02) | (width >> 8 & 0x01); - - 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); -} - -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) - 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); - 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 */ - mode = (h || v)? 0x30: 0x00; - } - return em28xx_write_reg_bits(dev, COMPR_REG, mode, 0x30); -} - -/* FIXME: this only function read values from dev */ -int em28xx_resolution_set(struct em28xx *dev) -{ - int width, height; - width = norm_maxw(dev); - height = norm_maxh(dev) >> 1; - - em28xx_outfmt_set_yuv422(dev); - em28xx_accumulator_set(dev, 1, (width - 4) >> 2, 1, (height - 4) >> 2); - em28xx_capture_area_set(dev, 0, 0, width >> 2, height >> 2); - 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, struct pt_regs *regs) -{ - int len = 0; - int ntrans = 0; - int i; - - 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"); - } - 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))); - } -} -#endif - -static inline int em28xx_isoc_video(struct em28xx *dev,struct em28xx_frame_t **f, - unsigned long *lock_flags, unsigned char buf) -{ - 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; - } - } - } - return (0); -} - -static inline void em28xx_isoc_video_copy(struct em28xx *dev, - struct em28xx_frame_t **f, unsigned char *buf, int len) -{ - void *fieldstart, *startwrite, *startread; - int linesdone, currlinedone, offset, lencopy,remain; - - 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 ((*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; - - if ((*f)->top_field) - fieldstart = (*f)->bufmem; - 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; -} - -/* - * em28xx_isoIrq() - * handles the incoming isoc urbs and fills the frames from our inqueue - */ -void em28xx_isocIrq(struct urb *urb, struct pt_regs *regs) -{ - 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, regs); -#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 > - dev->max_pkt_size) { - 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!!!"); - } - - /* actual copying */ - if ((*f)->state == F_GRABBING) { - em28xx_isoc_video_copy(dev,f,buf, len); - } - } - } - - 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; - } - wake_up_interruptible(&dev->wait_frame); - return; -} - -/* - * em28xx_uninit_isoc() - * deallocates the buffers and urbs allocated during em28xx_init_iosc() - */ -void em28xx_uninit_isoc(struct em28xx *dev) -{ - 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]){ - usb_buffer_free(dev->udev,(EM28XX_NUM_PACKETS*dev->max_pkt_size),dev->transfer_buffer[i],dev->urb[i]->transfer_dma); - } - usb_free_urb(dev->urb[i]); - } - dev->urb[i] = NULL; - dev->transfer_buffer[i] = NULL; - } - em28xx_capture_start(dev, 0); -} - -/* - * em28xx_init_isoc() - * allocates transfer buffers and submits the urbs for isoc transfer - */ -int em28xx_init_isoc(struct em28xx *dev) -{ - /* change interface to 3 which allowes the biggest packet sizes */ - int i, errCode; - const int 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, k; - /* allocate transfer buffer */ - urb = usb_alloc_urb(EM28XX_NUM_PACKETS, GFP_KERNEL); - if (!urb){ - em28xx_errdev("cannot alloc 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); - em28xx_uninit_isoc(dev); - 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->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 = k = 0; j < EM28XX_NUM_PACKETS; - j++, k += dev->max_pkt_size) { - urb->iso_frame_desc[j].offset = k; - urb->iso_frame_desc[j].length = - dev->max_pkt_size; - } - dev->urb[i] = urb; - } - - /* submit urbs */ - 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; - dev->alt = alt; - if (dev->alt == 0) { - int i; - for(i=0;i< dev->num_alt; i++) - if(dev->alt_max_pkt_size[i]>dev->alt_max_pkt_size[dev->alt]) - dev->alt=i; - } - - if (dev->alt != prev_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; - } - } - return 0; -} |