| /* |
| 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@infradead.org> |
| 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/usb.h> |
| #include <linux/vmalloc.h> |
| |
| #include "em28xx.h" |
| |
| /* #define ENABLE_DEBUG_ISOC_FRAMES */ |
| |
| 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, __func__ , ##arg); } while (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, __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"); |
| |
| /* 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() |
| * 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; |
| |
| if (dev->state & DEV_DISCONNECTED) |
| return(-ENODEV); |
| |
| 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(KERN_INFO " %02x", (unsigned char)buf[byte]); |
| |
| printk(KERN_INFO "\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; |
| |
| if (dev->state & DEV_DISCONNECTED) |
| return(-ENODEV); |
| |
| 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", (unsigned char) 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; |
| |
| if (dev->state & DEV_DISCONNECTED) |
| return(-ENODEV); |
| |
| 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(KERN_INFO " %02x", (unsigned char)buf[i]); |
| printk(KERN_INFO "\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); |
| 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); |
| } |
| |
| /* |
| * em28xx_write_reg_bits() |
| * sets only some bits (specified by bitmask) of a register, by first reading |
| * the actual value |
| */ |
| static int em28xx_write_reg_bits(struct em28xx *dev, u16 reg, u8 val, |
| u8 bitmask) |
| { |
| int oldval; |
| u8 newval; |
| |
| 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); |
| } |
| |
| /* |
| * em28xx_write_ac97() |
| * write a 16 bit value to the specified AC97 address (LSB first!) |
| */ |
| static int em28xx_write_ac97(struct em28xx *dev, u8 reg, u8 *val) |
| { |
| int ret, i; |
| u8 addr = reg & 0x7f; |
| |
| ret = em28xx_write_regs(dev, AC97LSB_REG, val, 2); |
| if (ret < 0) |
| return ret; |
| |
| ret = em28xx_write_regs(dev, AC97ADDR_REG, &addr, 1); |
| if (ret < 0) |
| return ret; |
| |
| /* Wait up to 50 ms for AC97 command to complete */ |
| for (i = 0; i < 10; i++) { |
| ret = em28xx_read_reg(dev, AC97BUSY_REG); |
| if (ret < 0) |
| return ret; |
| |
| if (!(ret & 0x01)) |
| return 0; |
| msleep(5); |
| } |
| em28xx_warn("AC97 command still being executed: not handled properly!\n"); |
| return 0; |
| } |
| |
| static int em28xx_set_audio_source(struct em28xx *dev) |
| { |
| static char *enable = "\x08\x08"; |
| static char *disable = "\x08\x88"; |
| char *video = enable, *line = disable; |
| int ret; |
| u8 input; |
| |
| if (dev->is_em2800) { |
| if (dev->ctl_ainput) |
| input = EM2800_AUDIO_SRC_LINE; |
| else |
| input = EM2800_AUDIO_SRC_TUNER; |
| |
| ret = em28xx_write_regs(dev, EM2800_AUDIOSRC_REG, &input, 1); |
| if (ret < 0) |
| return ret; |
| } |
| |
| if (dev->has_msp34xx) |
| input = EM28XX_AUDIO_SRC_TUNER; |
| else { |
| switch (dev->ctl_ainput) { |
| case EM28XX_AMUX_VIDEO: |
| input = EM28XX_AUDIO_SRC_TUNER; |
| break; |
| case EM28XX_AMUX_LINE_IN: |
| input = EM28XX_AUDIO_SRC_LINE; |
| break; |
| case EM28XX_AMUX_AC97_VIDEO: |
| input = EM28XX_AUDIO_SRC_LINE; |
| break; |
| case EM28XX_AMUX_AC97_LINE_IN: |
| input = EM28XX_AUDIO_SRC_LINE; |
| video = disable; |
| line = enable; |
| break; |
| } |
| } |
| |
| ret = em28xx_write_reg_bits(dev, AUDIOSRC_REG, input, 0xc0); |
| if (ret < 0) |
| return ret; |
| msleep(5); |
| |
| /* Sets AC97 mixer registers |
| This is seems to be needed, even for non-ac97 configs |
| */ |
| ret = em28xx_write_ac97(dev, VIDEO_AC97, video); |
| if (ret < 0) |
| return ret; |
| |
| ret = em28xx_write_ac97(dev, LINE_IN_AC97, line); |
| |
| return ret; |
| } |
| |
| int em28xx_audio_analog_set(struct em28xx *dev) |
| { |
| int ret; |
| char s[2] = { 0x00, 0x00 }; |
| u8 xclk = 0x07; |
| |
| s[0] |= 0x1f - dev->volume; |
| s[1] |= 0x1f - dev->volume; |
| |
| /* Mute */ |
| s[1] |= 0x80; |
| ret = em28xx_write_ac97(dev, MASTER_AC97, s); |
| |
| if (ret < 0) |
| return ret; |
| |
| if (dev->has_12mhz_i2s) |
| xclk |= 0x20; |
| |
| if (!dev->mute) |
| xclk |= 0x80; |
| |
| ret = em28xx_write_reg_bits(dev, XCLK_REG, xclk, 0xa7); |
| if (ret < 0) |
| return ret; |
| msleep(10); |
| |
| /* Selects the proper audio input */ |
| ret = em28xx_set_audio_source(dev); |
| |
| /* Unmute device */ |
| if (!dev->mute) |
| s[1] &= ~0x80; |
| ret = em28xx_write_ac97(dev, MASTER_AC97, s); |
| |
| return ret; |
| } |
| 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); |
| } |
| |
| int em28xx_capture_start(struct em28xx *dev, int start) |
| { |
| int rc; |
| /* FIXME: which is the best order? */ |
| /* video registers are sampled by VREF */ |
| rc = em28xx_write_reg_bits(dev, USBSUSP_REG, |
| start ? 0x10 : 0x00, 0x10); |
| if (rc < 0) |
| return rc; |
| |
| if (!start) { |
| /* disable video capture */ |
| rc = em28xx_write_regs(dev, VINENABLE_REG, "\x27", 1); |
| return rc; |
| } |
| |
| /* enable video capture */ |
| rc = em28xx_write_regs_req(dev, 0x00, 0x48, "\x00", 1); |
| |
| if (dev->mode == EM28XX_ANALOG_MODE) |
| rc = em28xx_write_regs(dev, VINENABLE_REG, "\x67", 1); |
| else |
| rc = em28xx_write_regs(dev, VINENABLE_REG, "\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); |
| } |
| |
| 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_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); |
| } |
| |
| static 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); |
| } |
| |
| 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) |
| 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); |
| } |
| |
| int em28xx_set_alternate(struct em28xx *dev) |
| { |
| int errCode, prev_alt = dev->alt; |
| int i; |
| unsigned int min_pkt_size = dev->width * 2 + 4; |
| |
| /* 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; |
| } |
| } |
| return 0; |
| } |
| |
| /* ------------------------------------------------------------------ |
| URB control |
| ------------------------------------------------------------------*/ |
| |
| /* |
| * IRQ callback, called by URB callback |
| */ |
| static void em28xx_irq_callback(struct urb *urb) |
| { |
| struct em28xx_dmaqueue *dma_q = urb->context; |
| struct em28xx *dev = container_of(dma_q, struct em28xx, vidq); |
| int rc, i; |
| |
| /* 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; |
| |
| urb->status = usb_submit_urb(urb, GFP_ATOMIC); |
| if (urb->status) { |
| em28xx_err("urb resubmit failed (error=%i)\n", |
| urb->status); |
| } |
| } |
| |
| /* |
| * Stop and Deallocate URBs |
| */ |
| void em28xx_uninit_isoc(struct em28xx *dev) |
| { |
| struct urb *urb; |
| int 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, |
| urb->transfer_buffer_length, |
| dev->isoc_ctl.transfer_buffer[i], |
| urb->transfer_dma); |
| } |
| usb_free_urb(urb); |
| dev->isoc_ctl.urb[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); |
| |
| /* |
| * Allocate URBs and start IRQ |
| */ |
| 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), |
| int cap_type) |
| { |
| 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->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); |
| return -ENOMEM; |
| } |
| 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, |
| cap_type == EM28XX_ANALOG_CAPTURE ? 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; |
| } |
| } |
| |
| init_waitqueue_head(&dma_q->wq); |
| |
| em28xx_capture_start(dev, cap_type); |
| |
| /* 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); |