| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| * Main USB camera driver |
| * |
| * Copyright (C) 2008-2011 Jean-François Moine <http://moinejf.free.fr> |
| * |
| * Camera button input handling by Márton Németh |
| * Copyright (C) 2009-2010 Márton Németh <nm127@freemail.hu> |
| */ |
| |
| #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| |
| #define GSPCA_VERSION "2.14.0" |
| |
| #include <linux/init.h> |
| #include <linux/fs.h> |
| #include <linux/vmalloc.h> |
| #include <linux/sched.h> |
| #include <linux/slab.h> |
| #include <linux/mm.h> |
| #include <linux/string.h> |
| #include <linux/pagemap.h> |
| #include <linux/io.h> |
| #include <asm/page.h> |
| #include <linux/uaccess.h> |
| #include <linux/ktime.h> |
| #include <media/v4l2-ioctl.h> |
| #include <media/v4l2-ctrls.h> |
| #include <media/v4l2-fh.h> |
| #include <media/v4l2-event.h> |
| |
| #include "gspca.h" |
| |
| #if IS_ENABLED(CONFIG_INPUT) |
| #include <linux/input.h> |
| #include <linux/usb/input.h> |
| #endif |
| |
| /* global values */ |
| #define DEF_NURBS 3 /* default number of URBs */ |
| #if DEF_NURBS > MAX_NURBS |
| #error "DEF_NURBS too big" |
| #endif |
| |
| MODULE_AUTHOR("Jean-François Moine <http://moinejf.free.fr>"); |
| MODULE_DESCRIPTION("GSPCA USB Camera Driver"); |
| MODULE_LICENSE("GPL"); |
| MODULE_VERSION(GSPCA_VERSION); |
| |
| int gspca_debug; |
| EXPORT_SYMBOL(gspca_debug); |
| |
| static void PDEBUG_MODE(struct gspca_dev *gspca_dev, int debug, char *txt, |
| __u32 pixfmt, int w, int h) |
| { |
| if ((pixfmt >> 24) >= '0' && (pixfmt >> 24) <= 'z') { |
| gspca_dbg(gspca_dev, debug, "%s %c%c%c%c %dx%d\n", |
| txt, |
| pixfmt & 0xff, |
| (pixfmt >> 8) & 0xff, |
| (pixfmt >> 16) & 0xff, |
| pixfmt >> 24, |
| w, h); |
| } else { |
| gspca_dbg(gspca_dev, debug, "%s 0x%08x %dx%d\n", |
| txt, |
| pixfmt, |
| w, h); |
| } |
| } |
| |
| /* specific memory types - !! should be different from V4L2_MEMORY_xxx */ |
| #define GSPCA_MEMORY_NO 0 /* V4L2_MEMORY_xxx starts from 1 */ |
| #define GSPCA_MEMORY_READ 7 |
| |
| /* |
| * Input and interrupt endpoint handling functions |
| */ |
| #if IS_ENABLED(CONFIG_INPUT) |
| static void int_irq(struct urb *urb) |
| { |
| struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context; |
| int ret; |
| |
| ret = urb->status; |
| switch (ret) { |
| case 0: |
| if (gspca_dev->sd_desc->int_pkt_scan(gspca_dev, |
| urb->transfer_buffer, urb->actual_length) < 0) { |
| gspca_err(gspca_dev, "Unknown packet received\n"); |
| } |
| break; |
| |
| case -ENOENT: |
| case -ECONNRESET: |
| case -ENODEV: |
| case -ESHUTDOWN: |
| /* Stop is requested either by software or hardware is gone, |
| * keep the ret value non-zero and don't resubmit later. |
| */ |
| break; |
| |
| default: |
| gspca_err(gspca_dev, "URB error %i, resubmitting\n", |
| urb->status); |
| urb->status = 0; |
| ret = 0; |
| } |
| |
| if (ret == 0) { |
| ret = usb_submit_urb(urb, GFP_ATOMIC); |
| if (ret < 0) |
| pr_err("Resubmit URB failed with error %i\n", ret); |
| } |
| } |
| |
| static int gspca_input_connect(struct gspca_dev *dev) |
| { |
| struct input_dev *input_dev; |
| int err = 0; |
| |
| dev->input_dev = NULL; |
| if (dev->sd_desc->int_pkt_scan || dev->sd_desc->other_input) { |
| input_dev = input_allocate_device(); |
| if (!input_dev) |
| return -ENOMEM; |
| |
| usb_make_path(dev->dev, dev->phys, sizeof(dev->phys)); |
| strlcat(dev->phys, "/input0", sizeof(dev->phys)); |
| |
| input_dev->name = dev->sd_desc->name; |
| input_dev->phys = dev->phys; |
| |
| usb_to_input_id(dev->dev, &input_dev->id); |
| |
| input_dev->evbit[0] = BIT_MASK(EV_KEY); |
| input_dev->keybit[BIT_WORD(KEY_CAMERA)] = BIT_MASK(KEY_CAMERA); |
| input_dev->dev.parent = &dev->dev->dev; |
| |
| err = input_register_device(input_dev); |
| if (err) { |
| pr_err("Input device registration failed with error %i\n", |
| err); |
| input_dev->dev.parent = NULL; |
| input_free_device(input_dev); |
| } else { |
| dev->input_dev = input_dev; |
| } |
| } |
| |
| return err; |
| } |
| |
| static int alloc_and_submit_int_urb(struct gspca_dev *gspca_dev, |
| struct usb_endpoint_descriptor *ep) |
| { |
| unsigned int buffer_len; |
| int interval; |
| struct urb *urb; |
| struct usb_device *dev; |
| void *buffer = NULL; |
| int ret = -EINVAL; |
| |
| buffer_len = le16_to_cpu(ep->wMaxPacketSize); |
| interval = ep->bInterval; |
| gspca_dbg(gspca_dev, D_CONF, "found int in endpoint: 0x%x, buffer_len=%u, interval=%u\n", |
| ep->bEndpointAddress, buffer_len, interval); |
| |
| dev = gspca_dev->dev; |
| |
| urb = usb_alloc_urb(0, GFP_KERNEL); |
| if (!urb) { |
| ret = -ENOMEM; |
| goto error; |
| } |
| |
| buffer = usb_alloc_coherent(dev, buffer_len, |
| GFP_KERNEL, &urb->transfer_dma); |
| if (!buffer) { |
| ret = -ENOMEM; |
| goto error_buffer; |
| } |
| usb_fill_int_urb(urb, dev, |
| usb_rcvintpipe(dev, ep->bEndpointAddress), |
| buffer, buffer_len, |
| int_irq, (void *)gspca_dev, interval); |
| urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
| ret = usb_submit_urb(urb, GFP_KERNEL); |
| if (ret < 0) { |
| gspca_err(gspca_dev, "submit int URB failed with error %i\n", |
| ret); |
| goto error_submit; |
| } |
| gspca_dev->int_urb = urb; |
| return ret; |
| |
| error_submit: |
| usb_free_coherent(dev, |
| urb->transfer_buffer_length, |
| urb->transfer_buffer, |
| urb->transfer_dma); |
| error_buffer: |
| usb_free_urb(urb); |
| error: |
| return ret; |
| } |
| |
| static void gspca_input_create_urb(struct gspca_dev *gspca_dev) |
| { |
| struct usb_interface *intf; |
| struct usb_host_interface *intf_desc; |
| struct usb_endpoint_descriptor *ep; |
| int i; |
| |
| if (gspca_dev->sd_desc->int_pkt_scan) { |
| intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface); |
| intf_desc = intf->cur_altsetting; |
| for (i = 0; i < intf_desc->desc.bNumEndpoints; i++) { |
| ep = &intf_desc->endpoint[i].desc; |
| if (usb_endpoint_dir_in(ep) && |
| usb_endpoint_xfer_int(ep)) { |
| |
| alloc_and_submit_int_urb(gspca_dev, ep); |
| break; |
| } |
| } |
| } |
| } |
| |
| static void gspca_input_destroy_urb(struct gspca_dev *gspca_dev) |
| { |
| struct urb *urb; |
| |
| urb = gspca_dev->int_urb; |
| if (urb) { |
| gspca_dev->int_urb = NULL; |
| usb_kill_urb(urb); |
| usb_free_coherent(gspca_dev->dev, |
| urb->transfer_buffer_length, |
| urb->transfer_buffer, |
| urb->transfer_dma); |
| usb_free_urb(urb); |
| } |
| } |
| #else |
| static inline void gspca_input_destroy_urb(struct gspca_dev *gspca_dev) |
| { |
| } |
| |
| static inline void gspca_input_create_urb(struct gspca_dev *gspca_dev) |
| { |
| } |
| |
| static inline int gspca_input_connect(struct gspca_dev *dev) |
| { |
| return 0; |
| } |
| #endif |
| |
| /* |
| * fill a video frame from an URB and resubmit |
| */ |
| static void fill_frame(struct gspca_dev *gspca_dev, |
| struct urb *urb) |
| { |
| u8 *data; /* address of data in the iso message */ |
| int i, len, st; |
| cam_pkt_op pkt_scan; |
| |
| if (urb->status != 0) { |
| if (urb->status == -ESHUTDOWN) |
| return; /* disconnection */ |
| #ifdef CONFIG_PM |
| if (gspca_dev->frozen) |
| return; |
| #endif |
| gspca_err(gspca_dev, "urb status: %d\n", urb->status); |
| urb->status = 0; |
| goto resubmit; |
| } |
| pkt_scan = gspca_dev->sd_desc->pkt_scan; |
| for (i = 0; i < urb->number_of_packets; i++) { |
| len = urb->iso_frame_desc[i].actual_length; |
| |
| /* check the packet status and length */ |
| st = urb->iso_frame_desc[i].status; |
| if (st) { |
| gspca_dbg(gspca_dev, D_PACK, "ISOC data error: [%d] len=%d, status=%d\n", |
| i, len, st); |
| gspca_dev->last_packet_type = DISCARD_PACKET; |
| continue; |
| } |
| if (len == 0) { |
| if (gspca_dev->empty_packet == 0) |
| gspca_dev->empty_packet = 1; |
| continue; |
| } |
| |
| /* let the packet be analyzed by the subdriver */ |
| gspca_dbg(gspca_dev, D_PACK, "packet [%d] o:%d l:%d\n", |
| i, urb->iso_frame_desc[i].offset, len); |
| data = (u8 *) urb->transfer_buffer |
| + urb->iso_frame_desc[i].offset; |
| pkt_scan(gspca_dev, data, len); |
| } |
| |
| resubmit: |
| if (!gspca_dev->streaming) |
| return; |
| /* resubmit the URB */ |
| st = usb_submit_urb(urb, GFP_ATOMIC); |
| if (st < 0) |
| pr_err("usb_submit_urb() ret %d\n", st); |
| } |
| |
| /* |
| * ISOC message interrupt from the USB device |
| * |
| * Analyse each packet and call the subdriver for copy to the frame buffer. |
| */ |
| static void isoc_irq(struct urb *urb) |
| { |
| struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context; |
| |
| gspca_dbg(gspca_dev, D_PACK, "isoc irq\n"); |
| if (!gspca_dev->streaming) |
| return; |
| fill_frame(gspca_dev, urb); |
| } |
| |
| /* |
| * bulk message interrupt from the USB device |
| */ |
| static void bulk_irq(struct urb *urb) |
| { |
| struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context; |
| int st; |
| |
| gspca_dbg(gspca_dev, D_PACK, "bulk irq\n"); |
| if (!gspca_dev->streaming) |
| return; |
| switch (urb->status) { |
| case 0: |
| break; |
| case -ESHUTDOWN: |
| return; /* disconnection */ |
| default: |
| #ifdef CONFIG_PM |
| if (gspca_dev->frozen) |
| return; |
| #endif |
| gspca_err(gspca_dev, "urb status: %d\n", urb->status); |
| urb->status = 0; |
| goto resubmit; |
| } |
| |
| gspca_dbg(gspca_dev, D_PACK, "packet l:%d\n", urb->actual_length); |
| gspca_dev->sd_desc->pkt_scan(gspca_dev, |
| urb->transfer_buffer, |
| urb->actual_length); |
| |
| resubmit: |
| if (!gspca_dev->streaming) |
| return; |
| /* resubmit the URB */ |
| if (gspca_dev->cam.bulk_nurbs != 0) { |
| st = usb_submit_urb(urb, GFP_ATOMIC); |
| if (st < 0) |
| pr_err("usb_submit_urb() ret %d\n", st); |
| } |
| } |
| |
| /* |
| * add data to the current frame |
| * |
| * This function is called by the subdrivers at interrupt level. |
| * |
| * To build a frame, these ones must add |
| * - one FIRST_PACKET |
| * - 0 or many INTER_PACKETs |
| * - one LAST_PACKET |
| * DISCARD_PACKET invalidates the whole frame. |
| */ |
| void gspca_frame_add(struct gspca_dev *gspca_dev, |
| enum gspca_packet_type packet_type, |
| const u8 *data, |
| int len) |
| { |
| struct gspca_buffer *buf; |
| unsigned long flags; |
| |
| gspca_dbg(gspca_dev, D_PACK, "add t:%d l:%d\n", packet_type, len); |
| |
| spin_lock_irqsave(&gspca_dev->qlock, flags); |
| buf = list_first_entry_or_null(&gspca_dev->buf_list, |
| typeof(*buf), list); |
| spin_unlock_irqrestore(&gspca_dev->qlock, flags); |
| |
| if (packet_type == FIRST_PACKET) { |
| /* if there is no queued buffer, discard the whole frame */ |
| if (!buf) { |
| gspca_dev->last_packet_type = DISCARD_PACKET; |
| gspca_dev->sequence++; |
| return; |
| } |
| gspca_dev->image = vb2_plane_vaddr(&buf->vb.vb2_buf, 0); |
| gspca_dev->image_len = 0; |
| } else { |
| switch (gspca_dev->last_packet_type) { |
| case DISCARD_PACKET: |
| if (packet_type == LAST_PACKET) { |
| gspca_dev->last_packet_type = packet_type; |
| gspca_dev->image = NULL; |
| gspca_dev->image_len = 0; |
| } |
| return; |
| case LAST_PACKET: |
| return; |
| } |
| } |
| |
| /* append the packet to the frame buffer */ |
| if (len > 0) { |
| if (gspca_dev->image_len + len > PAGE_ALIGN(gspca_dev->pixfmt.sizeimage)) { |
| gspca_err(gspca_dev, "frame overflow %d > %d\n", |
| gspca_dev->image_len + len, |
| PAGE_ALIGN(gspca_dev->pixfmt.sizeimage)); |
| packet_type = DISCARD_PACKET; |
| } else { |
| /* !! image is NULL only when last pkt is LAST or DISCARD |
| if (gspca_dev->image == NULL) { |
| pr_err("gspca_frame_add() image == NULL\n"); |
| return; |
| } |
| */ |
| memcpy(gspca_dev->image + gspca_dev->image_len, |
| data, len); |
| gspca_dev->image_len += len; |
| } |
| } |
| gspca_dev->last_packet_type = packet_type; |
| |
| /* if last packet, invalidate packet concatenation until |
| * next first packet, wake up the application and advance |
| * in the queue */ |
| if (packet_type == LAST_PACKET) { |
| if (gspca_dev->image_len > gspca_dev->pixfmt.sizeimage) |
| gspca_dev->image_len = gspca_dev->pixfmt.sizeimage; |
| spin_lock_irqsave(&gspca_dev->qlock, flags); |
| list_del(&buf->list); |
| spin_unlock_irqrestore(&gspca_dev->qlock, flags); |
| buf->vb.vb2_buf.timestamp = ktime_get_ns(); |
| vb2_set_plane_payload(&buf->vb.vb2_buf, 0, |
| gspca_dev->image_len); |
| buf->vb.sequence = gspca_dev->sequence++; |
| buf->vb.field = V4L2_FIELD_NONE; |
| gspca_dbg(gspca_dev, D_FRAM, "frame complete len:%d\n", |
| gspca_dev->image_len); |
| vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_DONE); |
| gspca_dev->image = NULL; |
| gspca_dev->image_len = 0; |
| } |
| } |
| EXPORT_SYMBOL(gspca_frame_add); |
| |
| static void destroy_urbs(struct gspca_dev *gspca_dev) |
| { |
| struct urb *urb; |
| unsigned int i; |
| |
| gspca_dbg(gspca_dev, D_STREAM, "kill transfer\n"); |
| |
| /* Killing all URBs guarantee that no URB completion |
| * handler is running. Therefore, there shouldn't |
| * be anyone trying to access gspca_dev->urb[i] |
| */ |
| for (i = 0; i < MAX_NURBS; i++) |
| usb_kill_urb(gspca_dev->urb[i]); |
| |
| gspca_dbg(gspca_dev, D_STREAM, "releasing urbs\n"); |
| for (i = 0; i < MAX_NURBS; i++) { |
| urb = gspca_dev->urb[i]; |
| if (!urb) |
| continue; |
| gspca_dev->urb[i] = NULL; |
| usb_free_coherent(gspca_dev->dev, |
| urb->transfer_buffer_length, |
| urb->transfer_buffer, |
| urb->transfer_dma); |
| usb_free_urb(urb); |
| } |
| } |
| |
| static int gspca_set_alt0(struct gspca_dev *gspca_dev) |
| { |
| int ret; |
| |
| if (gspca_dev->alt == 0) |
| return 0; |
| ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 0); |
| if (ret < 0) |
| pr_err("set alt 0 err %d\n", ret); |
| return ret; |
| } |
| |
| /* |
| * look for an input transfer endpoint in an alternate setting. |
| * |
| * If xfer_ep is invalid, return the first valid ep found, otherwise |
| * look for exactly the ep with address equal to xfer_ep. |
| */ |
| static struct usb_host_endpoint *alt_xfer(struct usb_host_interface *alt, |
| int xfer, int xfer_ep) |
| { |
| struct usb_host_endpoint *ep; |
| int i, attr; |
| |
| for (i = 0; i < alt->desc.bNumEndpoints; i++) { |
| ep = &alt->endpoint[i]; |
| attr = ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK; |
| if (attr == xfer |
| && ep->desc.wMaxPacketSize != 0 |
| && usb_endpoint_dir_in(&ep->desc) |
| && (xfer_ep < 0 || ep->desc.bEndpointAddress == xfer_ep)) |
| return ep; |
| } |
| return NULL; |
| } |
| |
| /* compute the minimum bandwidth for the current transfer */ |
| static u32 which_bandwidth(struct gspca_dev *gspca_dev) |
| { |
| u32 bandwidth; |
| |
| /* get the (max) image size */ |
| bandwidth = gspca_dev->pixfmt.sizeimage; |
| |
| /* if the image is compressed, estimate its mean size */ |
| if (!gspca_dev->cam.needs_full_bandwidth && |
| bandwidth < gspca_dev->pixfmt.width * |
| gspca_dev->pixfmt.height) |
| bandwidth = bandwidth * 3 / 8; /* 0.375 */ |
| |
| /* estimate the frame rate */ |
| if (gspca_dev->sd_desc->get_streamparm) { |
| struct v4l2_streamparm parm; |
| |
| gspca_dev->sd_desc->get_streamparm(gspca_dev, &parm); |
| bandwidth *= parm.parm.capture.timeperframe.denominator; |
| bandwidth /= parm.parm.capture.timeperframe.numerator; |
| } else { |
| |
| /* don't hope more than 15 fps with USB 1.1 and |
| * image resolution >= 640x480 */ |
| if (gspca_dev->pixfmt.width >= 640 |
| && gspca_dev->dev->speed == USB_SPEED_FULL) |
| bandwidth *= 15; /* 15 fps */ |
| else |
| bandwidth *= 30; /* 30 fps */ |
| } |
| |
| gspca_dbg(gspca_dev, D_STREAM, "min bandwidth: %d\n", bandwidth); |
| return bandwidth; |
| } |
| |
| /* endpoint table */ |
| #define MAX_ALT 16 |
| struct ep_tb_s { |
| u32 alt; |
| u32 bandwidth; |
| }; |
| |
| /* |
| * build the table of the endpoints |
| * and compute the minimum bandwidth for the image transfer |
| */ |
| static int build_isoc_ep_tb(struct gspca_dev *gspca_dev, |
| struct usb_interface *intf, |
| struct ep_tb_s *ep_tb) |
| { |
| struct usb_host_endpoint *ep; |
| int i, j, nbalt, psize, found; |
| u32 bandwidth, last_bw; |
| |
| nbalt = intf->num_altsetting; |
| if (nbalt > MAX_ALT) |
| nbalt = MAX_ALT; /* fixme: should warn */ |
| |
| /* build the endpoint table */ |
| i = 0; |
| last_bw = 0; |
| for (;;) { |
| ep_tb->bandwidth = 2000 * 2000 * 120; |
| found = 0; |
| for (j = 0; j < nbalt; j++) { |
| ep = alt_xfer(&intf->altsetting[j], |
| USB_ENDPOINT_XFER_ISOC, |
| gspca_dev->xfer_ep); |
| if (ep == NULL) |
| continue; |
| if (ep->desc.bInterval == 0) { |
| pr_err("alt %d iso endp with 0 interval\n", j); |
| continue; |
| } |
| psize = le16_to_cpu(ep->desc.wMaxPacketSize); |
| psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3)); |
| bandwidth = psize * 1000; |
| if (gspca_dev->dev->speed == USB_SPEED_HIGH |
| || gspca_dev->dev->speed >= USB_SPEED_SUPER) |
| bandwidth *= 8; |
| bandwidth /= 1 << (ep->desc.bInterval - 1); |
| if (bandwidth <= last_bw) |
| continue; |
| if (bandwidth < ep_tb->bandwidth) { |
| ep_tb->bandwidth = bandwidth; |
| ep_tb->alt = j; |
| found = 1; |
| } |
| } |
| if (!found) |
| break; |
| gspca_dbg(gspca_dev, D_STREAM, "alt %d bandwidth %d\n", |
| ep_tb->alt, ep_tb->bandwidth); |
| last_bw = ep_tb->bandwidth; |
| i++; |
| ep_tb++; |
| } |
| |
| /* |
| * If the camera: |
| * has a usb audio class interface (a built in usb mic); and |
| * is a usb 1 full speed device; and |
| * uses the max full speed iso bandwidth; and |
| * and has more than 1 alt setting |
| * then skip the highest alt setting to spare bandwidth for the mic |
| */ |
| if (gspca_dev->audio && |
| gspca_dev->dev->speed == USB_SPEED_FULL && |
| last_bw >= 1000000 && |
| i > 1) { |
| gspca_dbg(gspca_dev, D_STREAM, "dev has usb audio, skipping highest alt\n"); |
| i--; |
| ep_tb--; |
| } |
| |
| /* get the requested bandwidth and start at the highest atlsetting */ |
| bandwidth = which_bandwidth(gspca_dev); |
| ep_tb--; |
| while (i > 1) { |
| ep_tb--; |
| if (ep_tb->bandwidth < bandwidth) |
| break; |
| i--; |
| } |
| return i; |
| } |
| |
| /* |
| * create the URBs for image transfer |
| */ |
| static int create_urbs(struct gspca_dev *gspca_dev, |
| struct usb_host_endpoint *ep) |
| { |
| struct urb *urb; |
| int n, nurbs, i, psize, npkt, bsize; |
| |
| /* calculate the packet size and the number of packets */ |
| psize = le16_to_cpu(ep->desc.wMaxPacketSize); |
| |
| if (!gspca_dev->cam.bulk) { /* isoc */ |
| |
| /* See paragraph 5.9 / table 5-11 of the usb 2.0 spec. */ |
| if (gspca_dev->pkt_size == 0) |
| psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3)); |
| else |
| psize = gspca_dev->pkt_size; |
| npkt = gspca_dev->cam.npkt; |
| if (npkt == 0) |
| npkt = 32; /* default value */ |
| bsize = psize * npkt; |
| gspca_dbg(gspca_dev, D_STREAM, |
| "isoc %d pkts size %d = bsize:%d\n", |
| npkt, psize, bsize); |
| nurbs = DEF_NURBS; |
| } else { /* bulk */ |
| npkt = 0; |
| bsize = gspca_dev->cam.bulk_size; |
| if (bsize == 0) |
| bsize = psize; |
| gspca_dbg(gspca_dev, D_STREAM, "bulk bsize:%d\n", bsize); |
| if (gspca_dev->cam.bulk_nurbs != 0) |
| nurbs = gspca_dev->cam.bulk_nurbs; |
| else |
| nurbs = 1; |
| } |
| |
| for (n = 0; n < nurbs; n++) { |
| urb = usb_alloc_urb(npkt, GFP_KERNEL); |
| if (!urb) |
| return -ENOMEM; |
| gspca_dev->urb[n] = urb; |
| urb->transfer_buffer = usb_alloc_coherent(gspca_dev->dev, |
| bsize, |
| GFP_KERNEL, |
| &urb->transfer_dma); |
| |
| if (urb->transfer_buffer == NULL) { |
| pr_err("usb_alloc_coherent failed\n"); |
| return -ENOMEM; |
| } |
| urb->dev = gspca_dev->dev; |
| urb->context = gspca_dev; |
| urb->transfer_buffer_length = bsize; |
| if (npkt != 0) { /* ISOC */ |
| urb->pipe = usb_rcvisocpipe(gspca_dev->dev, |
| ep->desc.bEndpointAddress); |
| urb->transfer_flags = URB_ISO_ASAP |
| | URB_NO_TRANSFER_DMA_MAP; |
| urb->interval = 1 << (ep->desc.bInterval - 1); |
| urb->complete = isoc_irq; |
| urb->number_of_packets = npkt; |
| for (i = 0; i < npkt; i++) { |
| urb->iso_frame_desc[i].length = psize; |
| urb->iso_frame_desc[i].offset = psize * i; |
| } |
| } else { /* bulk */ |
| urb->pipe = usb_rcvbulkpipe(gspca_dev->dev, |
| ep->desc.bEndpointAddress); |
| urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP; |
| urb->complete = bulk_irq; |
| } |
| } |
| return 0; |
| } |
| |
| /* Note: both the queue and the usb locks should be held when calling this */ |
| static void gspca_stream_off(struct gspca_dev *gspca_dev) |
| { |
| gspca_dev->streaming = false; |
| gspca_dev->usb_err = 0; |
| if (gspca_dev->sd_desc->stopN) |
| gspca_dev->sd_desc->stopN(gspca_dev); |
| destroy_urbs(gspca_dev); |
| gspca_input_destroy_urb(gspca_dev); |
| gspca_set_alt0(gspca_dev); |
| if (gspca_dev->present) |
| gspca_input_create_urb(gspca_dev); |
| if (gspca_dev->sd_desc->stop0) |
| gspca_dev->sd_desc->stop0(gspca_dev); |
| gspca_dbg(gspca_dev, D_STREAM, "stream off OK\n"); |
| } |
| |
| /* |
| * start the USB transfer |
| */ |
| static int gspca_init_transfer(struct gspca_dev *gspca_dev) |
| { |
| struct usb_interface *intf; |
| struct usb_host_endpoint *ep; |
| struct urb *urb; |
| struct ep_tb_s ep_tb[MAX_ALT]; |
| int n, ret, xfer, alt, alt_idx; |
| |
| /* reset the streaming variables */ |
| gspca_dev->image = NULL; |
| gspca_dev->image_len = 0; |
| gspca_dev->last_packet_type = DISCARD_PACKET; |
| |
| gspca_dev->usb_err = 0; |
| |
| /* do the specific subdriver stuff before endpoint selection */ |
| intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface); |
| gspca_dev->alt = gspca_dev->cam.bulk ? intf->num_altsetting : 0; |
| if (gspca_dev->sd_desc->isoc_init) { |
| ret = gspca_dev->sd_desc->isoc_init(gspca_dev); |
| if (ret < 0) |
| return ret; |
| } |
| xfer = gspca_dev->cam.bulk ? USB_ENDPOINT_XFER_BULK |
| : USB_ENDPOINT_XFER_ISOC; |
| |
| /* if bulk or the subdriver forced an altsetting, get the endpoint */ |
| if (gspca_dev->alt != 0) { |
| gspca_dev->alt--; /* (previous version compatibility) */ |
| ep = alt_xfer(&intf->altsetting[gspca_dev->alt], xfer, |
| gspca_dev->xfer_ep); |
| if (ep == NULL) { |
| pr_err("bad altsetting %d\n", gspca_dev->alt); |
| return -EIO; |
| } |
| ep_tb[0].alt = gspca_dev->alt; |
| alt_idx = 1; |
| } else { |
| /* else, compute the minimum bandwidth |
| * and build the endpoint table */ |
| alt_idx = build_isoc_ep_tb(gspca_dev, intf, ep_tb); |
| if (alt_idx <= 0) { |
| pr_err("no transfer endpoint found\n"); |
| return -EIO; |
| } |
| } |
| |
| /* set the highest alternate setting and |
| * loop until urb submit succeeds */ |
| gspca_input_destroy_urb(gspca_dev); |
| |
| gspca_dev->alt = ep_tb[--alt_idx].alt; |
| alt = -1; |
| for (;;) { |
| if (alt != gspca_dev->alt) { |
| alt = gspca_dev->alt; |
| if (intf->num_altsetting > 1) { |
| ret = usb_set_interface(gspca_dev->dev, |
| gspca_dev->iface, |
| alt); |
| if (ret < 0) { |
| if (ret == -ENOSPC) |
| goto retry; /*fixme: ugly*/ |
| pr_err("set alt %d err %d\n", alt, ret); |
| goto out; |
| } |
| } |
| } |
| if (!gspca_dev->cam.no_urb_create) { |
| gspca_dbg(gspca_dev, D_STREAM, "init transfer alt %d\n", |
| alt); |
| ret = create_urbs(gspca_dev, |
| alt_xfer(&intf->altsetting[alt], xfer, |
| gspca_dev->xfer_ep)); |
| if (ret < 0) { |
| destroy_urbs(gspca_dev); |
| goto out; |
| } |
| } |
| |
| /* clear the bulk endpoint */ |
| if (gspca_dev->cam.bulk) |
| usb_clear_halt(gspca_dev->dev, |
| gspca_dev->urb[0]->pipe); |
| |
| /* start the cam */ |
| ret = gspca_dev->sd_desc->start(gspca_dev); |
| if (ret < 0) { |
| destroy_urbs(gspca_dev); |
| goto out; |
| } |
| v4l2_ctrl_handler_setup(gspca_dev->vdev.ctrl_handler); |
| gspca_dev->streaming = true; |
| |
| /* some bulk transfers are started by the subdriver */ |
| if (gspca_dev->cam.bulk && gspca_dev->cam.bulk_nurbs == 0) |
| break; |
| |
| /* submit the URBs */ |
| for (n = 0; n < MAX_NURBS; n++) { |
| urb = gspca_dev->urb[n]; |
| if (urb == NULL) |
| break; |
| ret = usb_submit_urb(urb, GFP_KERNEL); |
| if (ret < 0) |
| break; |
| } |
| if (ret >= 0) |
| break; /* transfer is started */ |
| |
| /* something when wrong |
| * stop the webcam and free the transfer resources */ |
| gspca_stream_off(gspca_dev); |
| if (ret != -ENOSPC) { |
| pr_err("usb_submit_urb alt %d err %d\n", |
| gspca_dev->alt, ret); |
| goto out; |
| } |
| |
| /* the bandwidth is not wide enough |
| * negotiate or try a lower alternate setting */ |
| retry: |
| gspca_err(gspca_dev, "alt %d - bandwidth not wide enough, trying again\n", |
| alt); |
| msleep(20); /* wait for kill complete */ |
| if (gspca_dev->sd_desc->isoc_nego) { |
| ret = gspca_dev->sd_desc->isoc_nego(gspca_dev); |
| if (ret < 0) |
| goto out; |
| } else { |
| if (alt_idx <= 0) { |
| pr_err("no transfer endpoint found\n"); |
| ret = -EIO; |
| goto out; |
| } |
| gspca_dev->alt = ep_tb[--alt_idx].alt; |
| } |
| } |
| out: |
| gspca_input_create_urb(gspca_dev); |
| return ret; |
| } |
| |
| static void gspca_set_default_mode(struct gspca_dev *gspca_dev) |
| { |
| int i; |
| |
| i = gspca_dev->cam.nmodes - 1; /* take the highest mode */ |
| gspca_dev->curr_mode = i; |
| gspca_dev->pixfmt = gspca_dev->cam.cam_mode[i]; |
| |
| /* does nothing if ctrl_handler == NULL */ |
| v4l2_ctrl_handler_setup(gspca_dev->vdev.ctrl_handler); |
| } |
| |
| static int wxh_to_mode(struct gspca_dev *gspca_dev, |
| int width, int height, u32 pixelformat) |
| { |
| int i; |
| |
| for (i = 0; i < gspca_dev->cam.nmodes; i++) { |
| if (width == gspca_dev->cam.cam_mode[i].width |
| && height == gspca_dev->cam.cam_mode[i].height |
| && pixelformat == gspca_dev->cam.cam_mode[i].pixelformat) |
| return i; |
| } |
| return -EINVAL; |
| } |
| |
| static int wxh_to_nearest_mode(struct gspca_dev *gspca_dev, |
| int width, int height, u32 pixelformat) |
| { |
| int i; |
| |
| for (i = gspca_dev->cam.nmodes; --i >= 0; ) { |
| if (width >= gspca_dev->cam.cam_mode[i].width |
| && height >= gspca_dev->cam.cam_mode[i].height |
| && pixelformat == gspca_dev->cam.cam_mode[i].pixelformat) |
| return i; |
| } |
| for (i = gspca_dev->cam.nmodes; --i > 0; ) { |
| if (width >= gspca_dev->cam.cam_mode[i].width |
| && height >= gspca_dev->cam.cam_mode[i].height) |
| break; |
| } |
| return i; |
| } |
| |
| /* |
| * search a mode with the right pixel format |
| */ |
| static int gspca_get_mode(struct gspca_dev *gspca_dev, |
| int mode, |
| int pixfmt) |
| { |
| int modeU, modeD; |
| |
| modeU = modeD = mode; |
| while ((modeU < gspca_dev->cam.nmodes) || modeD >= 0) { |
| if (--modeD >= 0) { |
| if (gspca_dev->cam.cam_mode[modeD].pixelformat |
| == pixfmt) |
| return modeD; |
| } |
| if (++modeU < gspca_dev->cam.nmodes) { |
| if (gspca_dev->cam.cam_mode[modeU].pixelformat |
| == pixfmt) |
| return modeU; |
| } |
| } |
| return -EINVAL; |
| } |
| |
| #ifdef CONFIG_VIDEO_ADV_DEBUG |
| static int vidioc_g_chip_info(struct file *file, void *priv, |
| struct v4l2_dbg_chip_info *chip) |
| { |
| struct gspca_dev *gspca_dev = video_drvdata(file); |
| |
| gspca_dev->usb_err = 0; |
| if (gspca_dev->sd_desc->get_chip_info) |
| return gspca_dev->sd_desc->get_chip_info(gspca_dev, chip); |
| return chip->match.addr ? -EINVAL : 0; |
| } |
| |
| static int vidioc_g_register(struct file *file, void *priv, |
| struct v4l2_dbg_register *reg) |
| { |
| struct gspca_dev *gspca_dev = video_drvdata(file); |
| |
| gspca_dev->usb_err = 0; |
| return gspca_dev->sd_desc->get_register(gspca_dev, reg); |
| } |
| |
| static int vidioc_s_register(struct file *file, void *priv, |
| const struct v4l2_dbg_register *reg) |
| { |
| struct gspca_dev *gspca_dev = video_drvdata(file); |
| |
| gspca_dev->usb_err = 0; |
| return gspca_dev->sd_desc->set_register(gspca_dev, reg); |
| } |
| #endif |
| |
| static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, |
| struct v4l2_fmtdesc *fmtdesc) |
| { |
| struct gspca_dev *gspca_dev = video_drvdata(file); |
| int i, j, index; |
| __u32 fmt_tb[8]; |
| |
| /* give an index to each format */ |
| index = 0; |
| for (i = gspca_dev->cam.nmodes; --i >= 0; ) { |
| fmt_tb[index] = gspca_dev->cam.cam_mode[i].pixelformat; |
| j = 0; |
| for (;;) { |
| if (fmt_tb[j] == fmt_tb[index]) |
| break; |
| j++; |
| } |
| if (j == index) { |
| if (fmtdesc->index == index) |
| break; /* new format */ |
| index++; |
| if (index >= ARRAY_SIZE(fmt_tb)) |
| return -EINVAL; |
| } |
| } |
| if (i < 0) |
| return -EINVAL; /* no more format */ |
| |
| fmtdesc->pixelformat = fmt_tb[index]; |
| return 0; |
| } |
| |
| static int vidioc_g_fmt_vid_cap(struct file *file, void *_priv, |
| struct v4l2_format *fmt) |
| { |
| struct gspca_dev *gspca_dev = video_drvdata(file); |
| u32 priv = fmt->fmt.pix.priv; |
| |
| fmt->fmt.pix = gspca_dev->pixfmt; |
| /* some drivers use priv internally, so keep the original value */ |
| fmt->fmt.pix.priv = priv; |
| return 0; |
| } |
| |
| static int try_fmt_vid_cap(struct gspca_dev *gspca_dev, |
| struct v4l2_format *fmt) |
| { |
| int w, h, mode, mode2; |
| |
| w = fmt->fmt.pix.width; |
| h = fmt->fmt.pix.height; |
| |
| PDEBUG_MODE(gspca_dev, D_CONF, "try fmt cap", |
| fmt->fmt.pix.pixelformat, w, h); |
| |
| /* search the nearest mode for width and height */ |
| mode = wxh_to_nearest_mode(gspca_dev, w, h, fmt->fmt.pix.pixelformat); |
| |
| /* OK if right palette */ |
| if (gspca_dev->cam.cam_mode[mode].pixelformat |
| != fmt->fmt.pix.pixelformat) { |
| |
| /* else, search the closest mode with the same pixel format */ |
| mode2 = gspca_get_mode(gspca_dev, mode, |
| fmt->fmt.pix.pixelformat); |
| if (mode2 >= 0) |
| mode = mode2; |
| } |
| fmt->fmt.pix = gspca_dev->cam.cam_mode[mode]; |
| if (gspca_dev->sd_desc->try_fmt) { |
| /* pass original resolution to subdriver try_fmt */ |
| fmt->fmt.pix.width = w; |
| fmt->fmt.pix.height = h; |
| gspca_dev->sd_desc->try_fmt(gspca_dev, fmt); |
| } |
| return mode; /* used when s_fmt */ |
| } |
| |
| static int vidioc_try_fmt_vid_cap(struct file *file, void *_priv, |
| struct v4l2_format *fmt) |
| { |
| struct gspca_dev *gspca_dev = video_drvdata(file); |
| u32 priv = fmt->fmt.pix.priv; |
| |
| if (try_fmt_vid_cap(gspca_dev, fmt) < 0) |
| return -EINVAL; |
| /* some drivers use priv internally, so keep the original value */ |
| fmt->fmt.pix.priv = priv; |
| return 0; |
| } |
| |
| static int vidioc_s_fmt_vid_cap(struct file *file, void *_priv, |
| struct v4l2_format *fmt) |
| { |
| struct gspca_dev *gspca_dev = video_drvdata(file); |
| u32 priv = fmt->fmt.pix.priv; |
| int mode; |
| |
| if (vb2_is_busy(&gspca_dev->queue)) |
| return -EBUSY; |
| |
| mode = try_fmt_vid_cap(gspca_dev, fmt); |
| if (mode < 0) |
| return -EINVAL; |
| |
| gspca_dev->curr_mode = mode; |
| if (gspca_dev->sd_desc->try_fmt) |
| /* subdriver try_fmt can modify format parameters */ |
| gspca_dev->pixfmt = fmt->fmt.pix; |
| else |
| gspca_dev->pixfmt = gspca_dev->cam.cam_mode[mode]; |
| /* some drivers use priv internally, so keep the original value */ |
| fmt->fmt.pix.priv = priv; |
| return 0; |
| } |
| |
| static int vidioc_enum_framesizes(struct file *file, void *priv, |
| struct v4l2_frmsizeenum *fsize) |
| { |
| struct gspca_dev *gspca_dev = video_drvdata(file); |
| int i; |
| __u32 index = 0; |
| |
| if (gspca_dev->sd_desc->enum_framesizes) |
| return gspca_dev->sd_desc->enum_framesizes(gspca_dev, fsize); |
| |
| for (i = 0; i < gspca_dev->cam.nmodes; i++) { |
| if (fsize->pixel_format != |
| gspca_dev->cam.cam_mode[i].pixelformat) |
| continue; |
| |
| if (fsize->index == index) { |
| fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; |
| fsize->discrete.width = |
| gspca_dev->cam.cam_mode[i].width; |
| fsize->discrete.height = |
| gspca_dev->cam.cam_mode[i].height; |
| return 0; |
| } |
| index++; |
| } |
| |
| return -EINVAL; |
| } |
| |
| static int vidioc_enum_frameintervals(struct file *filp, void *priv, |
| struct v4l2_frmivalenum *fival) |
| { |
| struct gspca_dev *gspca_dev = video_drvdata(filp); |
| int mode; |
| __u32 i; |
| |
| mode = wxh_to_mode(gspca_dev, fival->width, fival->height, |
| fival->pixel_format); |
| if (mode < 0) |
| return -EINVAL; |
| |
| if (gspca_dev->cam.mode_framerates == NULL || |
| gspca_dev->cam.mode_framerates[mode].nrates == 0) |
| return -EINVAL; |
| |
| if (fival->pixel_format != |
| gspca_dev->cam.cam_mode[mode].pixelformat) |
| return -EINVAL; |
| |
| for (i = 0; i < gspca_dev->cam.mode_framerates[mode].nrates; i++) { |
| if (fival->index == i) { |
| fival->type = V4L2_FRMIVAL_TYPE_DISCRETE; |
| fival->discrete.numerator = 1; |
| fival->discrete.denominator = |
| gspca_dev->cam.mode_framerates[mode].rates[i]; |
| return 0; |
| } |
| } |
| |
| return -EINVAL; |
| } |
| |
| static void gspca_release(struct v4l2_device *v4l2_device) |
| { |
| struct gspca_dev *gspca_dev = |
| container_of(v4l2_device, struct gspca_dev, v4l2_dev); |
| |
| v4l2_ctrl_handler_free(gspca_dev->vdev.ctrl_handler); |
| v4l2_device_unregister(&gspca_dev->v4l2_dev); |
| kfree(gspca_dev->usb_buf); |
| kfree(gspca_dev); |
| } |
| |
| static int vidioc_querycap(struct file *file, void *priv, |
| struct v4l2_capability *cap) |
| { |
| struct gspca_dev *gspca_dev = video_drvdata(file); |
| |
| strscpy((char *)cap->driver, gspca_dev->sd_desc->name, |
| sizeof(cap->driver)); |
| if (gspca_dev->dev->product != NULL) { |
| strscpy((char *)cap->card, gspca_dev->dev->product, |
| sizeof(cap->card)); |
| } else { |
| snprintf((char *) cap->card, sizeof cap->card, |
| "USB Camera (%04x:%04x)", |
| le16_to_cpu(gspca_dev->dev->descriptor.idVendor), |
| le16_to_cpu(gspca_dev->dev->descriptor.idProduct)); |
| } |
| usb_make_path(gspca_dev->dev, (char *) cap->bus_info, |
| sizeof(cap->bus_info)); |
| return 0; |
| } |
| |
| static int vidioc_enum_input(struct file *file, void *priv, |
| struct v4l2_input *input) |
| { |
| struct gspca_dev *gspca_dev = video_drvdata(file); |
| |
| if (input->index != 0) |
| return -EINVAL; |
| input->type = V4L2_INPUT_TYPE_CAMERA; |
| input->status = gspca_dev->cam.input_flags; |
| strscpy(input->name, gspca_dev->sd_desc->name, |
| sizeof input->name); |
| return 0; |
| } |
| |
| static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) |
| { |
| *i = 0; |
| return 0; |
| } |
| |
| static int vidioc_s_input(struct file *file, void *priv, unsigned int i) |
| { |
| if (i > 0) |
| return -EINVAL; |
| return 0; |
| } |
| |
| static int vidioc_g_jpegcomp(struct file *file, void *priv, |
| struct v4l2_jpegcompression *jpegcomp) |
| { |
| struct gspca_dev *gspca_dev = video_drvdata(file); |
| |
| gspca_dev->usb_err = 0; |
| return gspca_dev->sd_desc->get_jcomp(gspca_dev, jpegcomp); |
| } |
| |
| static int vidioc_s_jpegcomp(struct file *file, void *priv, |
| const struct v4l2_jpegcompression *jpegcomp) |
| { |
| struct gspca_dev *gspca_dev = video_drvdata(file); |
| |
| gspca_dev->usb_err = 0; |
| return gspca_dev->sd_desc->set_jcomp(gspca_dev, jpegcomp); |
| } |
| |
| static int vidioc_g_parm(struct file *filp, void *priv, |
| struct v4l2_streamparm *parm) |
| { |
| struct gspca_dev *gspca_dev = video_drvdata(filp); |
| |
| parm->parm.capture.readbuffers = gspca_dev->queue.min_buffers_needed; |
| |
| if (!gspca_dev->sd_desc->get_streamparm) |
| return 0; |
| |
| parm->parm.capture.capability = V4L2_CAP_TIMEPERFRAME; |
| gspca_dev->usb_err = 0; |
| gspca_dev->sd_desc->get_streamparm(gspca_dev, parm); |
| return gspca_dev->usb_err; |
| } |
| |
| static int vidioc_s_parm(struct file *filp, void *priv, |
| struct v4l2_streamparm *parm) |
| { |
| struct gspca_dev *gspca_dev = video_drvdata(filp); |
| |
| parm->parm.capture.readbuffers = gspca_dev->queue.min_buffers_needed; |
| |
| if (!gspca_dev->sd_desc->set_streamparm) { |
| parm->parm.capture.capability = 0; |
| return 0; |
| } |
| |
| parm->parm.capture.capability = V4L2_CAP_TIMEPERFRAME; |
| gspca_dev->usb_err = 0; |
| gspca_dev->sd_desc->set_streamparm(gspca_dev, parm); |
| return gspca_dev->usb_err; |
| } |
| |
| static int gspca_queue_setup(struct vb2_queue *vq, |
| unsigned int *nbuffers, unsigned int *nplanes, |
| unsigned int sizes[], struct device *alloc_devs[]) |
| { |
| struct gspca_dev *gspca_dev = vb2_get_drv_priv(vq); |
| unsigned int size = PAGE_ALIGN(gspca_dev->pixfmt.sizeimage); |
| |
| if (*nplanes) |
| return sizes[0] < size ? -EINVAL : 0; |
| *nplanes = 1; |
| sizes[0] = size; |
| return 0; |
| } |
| |
| static int gspca_buffer_prepare(struct vb2_buffer *vb) |
| { |
| struct gspca_dev *gspca_dev = vb2_get_drv_priv(vb->vb2_queue); |
| unsigned long size = PAGE_ALIGN(gspca_dev->pixfmt.sizeimage); |
| |
| if (vb2_plane_size(vb, 0) < size) { |
| gspca_err(gspca_dev, "buffer too small (%lu < %lu)\n", |
| vb2_plane_size(vb, 0), size); |
| return -EINVAL; |
| } |
| return 0; |
| } |
| |
| static void gspca_buffer_finish(struct vb2_buffer *vb) |
| { |
| struct gspca_dev *gspca_dev = vb2_get_drv_priv(vb->vb2_queue); |
| |
| if (!gspca_dev->sd_desc->dq_callback) |
| return; |
| |
| gspca_dev->usb_err = 0; |
| if (gspca_dev->present) |
| gspca_dev->sd_desc->dq_callback(gspca_dev); |
| } |
| |
| static void gspca_buffer_queue(struct vb2_buffer *vb) |
| { |
| struct gspca_dev *gspca_dev = vb2_get_drv_priv(vb->vb2_queue); |
| struct gspca_buffer *buf = to_gspca_buffer(vb); |
| unsigned long flags; |
| |
| spin_lock_irqsave(&gspca_dev->qlock, flags); |
| list_add_tail(&buf->list, &gspca_dev->buf_list); |
| spin_unlock_irqrestore(&gspca_dev->qlock, flags); |
| } |
| |
| static void gspca_return_all_buffers(struct gspca_dev *gspca_dev, |
| enum vb2_buffer_state state) |
| { |
| struct gspca_buffer *buf, *node; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&gspca_dev->qlock, flags); |
| list_for_each_entry_safe(buf, node, &gspca_dev->buf_list, list) { |
| vb2_buffer_done(&buf->vb.vb2_buf, state); |
| list_del(&buf->list); |
| } |
| spin_unlock_irqrestore(&gspca_dev->qlock, flags); |
| } |
| |
| static int gspca_start_streaming(struct vb2_queue *vq, unsigned int count) |
| { |
| struct gspca_dev *gspca_dev = vb2_get_drv_priv(vq); |
| int ret; |
| |
| gspca_dev->sequence = 0; |
| |
| ret = gspca_init_transfer(gspca_dev); |
| if (ret) |
| gspca_return_all_buffers(gspca_dev, VB2_BUF_STATE_QUEUED); |
| return ret; |
| } |
| |
| static void gspca_stop_streaming(struct vb2_queue *vq) |
| { |
| struct gspca_dev *gspca_dev = vb2_get_drv_priv(vq); |
| |
| gspca_stream_off(gspca_dev); |
| |
| /* Release all active buffers */ |
| gspca_return_all_buffers(gspca_dev, VB2_BUF_STATE_ERROR); |
| } |
| |
| static const struct vb2_ops gspca_qops = { |
| .queue_setup = gspca_queue_setup, |
| .buf_prepare = gspca_buffer_prepare, |
| .buf_finish = gspca_buffer_finish, |
| .buf_queue = gspca_buffer_queue, |
| .start_streaming = gspca_start_streaming, |
| .stop_streaming = gspca_stop_streaming, |
| .wait_prepare = vb2_ops_wait_prepare, |
| .wait_finish = vb2_ops_wait_finish, |
| }; |
| |
| static const struct v4l2_file_operations dev_fops = { |
| .owner = THIS_MODULE, |
| .open = v4l2_fh_open, |
| .release = vb2_fop_release, |
| .unlocked_ioctl = video_ioctl2, |
| .read = vb2_fop_read, |
| .mmap = vb2_fop_mmap, |
| .poll = vb2_fop_poll, |
| }; |
| |
| static const struct v4l2_ioctl_ops dev_ioctl_ops = { |
| .vidioc_querycap = vidioc_querycap, |
| .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, |
| .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, |
| .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, |
| .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, |
| .vidioc_enum_input = vidioc_enum_input, |
| .vidioc_g_input = vidioc_g_input, |
| .vidioc_s_input = vidioc_s_input, |
| .vidioc_g_jpegcomp = vidioc_g_jpegcomp, |
| .vidioc_s_jpegcomp = vidioc_s_jpegcomp, |
| .vidioc_g_parm = vidioc_g_parm, |
| .vidioc_s_parm = vidioc_s_parm, |
| .vidioc_enum_framesizes = vidioc_enum_framesizes, |
| .vidioc_enum_frameintervals = vidioc_enum_frameintervals, |
| |
| .vidioc_reqbufs = vb2_ioctl_reqbufs, |
| .vidioc_create_bufs = vb2_ioctl_create_bufs, |
| .vidioc_querybuf = vb2_ioctl_querybuf, |
| .vidioc_qbuf = vb2_ioctl_qbuf, |
| .vidioc_dqbuf = vb2_ioctl_dqbuf, |
| .vidioc_expbuf = vb2_ioctl_expbuf, |
| .vidioc_streamon = vb2_ioctl_streamon, |
| .vidioc_streamoff = vb2_ioctl_streamoff, |
| |
| #ifdef CONFIG_VIDEO_ADV_DEBUG |
| .vidioc_g_chip_info = vidioc_g_chip_info, |
| .vidioc_g_register = vidioc_g_register, |
| .vidioc_s_register = vidioc_s_register, |
| #endif |
| .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, |
| .vidioc_unsubscribe_event = v4l2_event_unsubscribe, |
| }; |
| |
| static const struct video_device gspca_template = { |
| .name = "gspca main driver", |
| .fops = &dev_fops, |
| .ioctl_ops = &dev_ioctl_ops, |
| .release = video_device_release_empty, /* We use v4l2_dev.release */ |
| }; |
| |
| /* |
| * probe and create a new gspca device |
| * |
| * This function must be called by the sub-driver when it is |
| * called for probing a new device. |
| */ |
| int gspca_dev_probe2(struct usb_interface *intf, |
| const struct usb_device_id *id, |
| const struct sd_desc *sd_desc, |
| int dev_size, |
| struct module *module) |
| { |
| struct gspca_dev *gspca_dev; |
| struct usb_device *dev = interface_to_usbdev(intf); |
| struct vb2_queue *q; |
| int ret; |
| |
| pr_info("%s-" GSPCA_VERSION " probing %04x:%04x\n", |
| sd_desc->name, id->idVendor, id->idProduct); |
| |
| /* create the device */ |
| if (dev_size < sizeof *gspca_dev) |
| dev_size = sizeof *gspca_dev; |
| gspca_dev = kzalloc(dev_size, GFP_KERNEL); |
| if (!gspca_dev) { |
| pr_err("couldn't kzalloc gspca struct\n"); |
| return -ENOMEM; |
| } |
| gspca_dev->usb_buf = kzalloc(USB_BUF_SZ, GFP_KERNEL); |
| if (!gspca_dev->usb_buf) { |
| pr_err("out of memory\n"); |
| ret = -ENOMEM; |
| goto out; |
| } |
| gspca_dev->dev = dev; |
| gspca_dev->iface = intf->cur_altsetting->desc.bInterfaceNumber; |
| gspca_dev->xfer_ep = -1; |
| |
| /* check if any audio device */ |
| if (dev->actconfig->desc.bNumInterfaces != 1) { |
| int i; |
| struct usb_interface *intf2; |
| |
| for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) { |
| intf2 = dev->actconfig->interface[i]; |
| if (intf2 != NULL |
| && intf2->altsetting != NULL |
| && intf2->altsetting->desc.bInterfaceClass == |
| USB_CLASS_AUDIO) { |
| gspca_dev->audio = 1; |
| break; |
| } |
| } |
| } |
| |
| gspca_dev->v4l2_dev.release = gspca_release; |
| ret = v4l2_device_register(&intf->dev, &gspca_dev->v4l2_dev); |
| if (ret) |
| goto out; |
| gspca_dev->present = true; |
| gspca_dev->sd_desc = sd_desc; |
| gspca_dev->empty_packet = -1; /* don't check the empty packets */ |
| gspca_dev->vdev = gspca_template; |
| gspca_dev->vdev.v4l2_dev = &gspca_dev->v4l2_dev; |
| gspca_dev->vdev.device_caps = V4L2_CAP_VIDEO_CAPTURE | |
| V4L2_CAP_STREAMING | V4L2_CAP_READWRITE; |
| video_set_drvdata(&gspca_dev->vdev, gspca_dev); |
| gspca_dev->module = module; |
| |
| mutex_init(&gspca_dev->usb_lock); |
| gspca_dev->vdev.lock = &gspca_dev->usb_lock; |
| init_waitqueue_head(&gspca_dev->wq); |
| |
| /* Initialize the vb2 queue */ |
| q = &gspca_dev->queue; |
| q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
| q->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF | VB2_READ; |
| q->drv_priv = gspca_dev; |
| q->buf_struct_size = sizeof(struct gspca_buffer); |
| q->ops = &gspca_qops; |
| q->mem_ops = &vb2_vmalloc_memops; |
| q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; |
| q->min_buffers_needed = 2; |
| q->lock = &gspca_dev->usb_lock; |
| ret = vb2_queue_init(q); |
| if (ret) |
| goto out; |
| gspca_dev->vdev.queue = q; |
| |
| INIT_LIST_HEAD(&gspca_dev->buf_list); |
| spin_lock_init(&gspca_dev->qlock); |
| |
| /* configure the subdriver and initialize the USB device */ |
| ret = sd_desc->config(gspca_dev, id); |
| if (ret < 0) |
| goto out; |
| ret = sd_desc->init(gspca_dev); |
| if (ret < 0) |
| goto out; |
| if (sd_desc->init_controls) |
| ret = sd_desc->init_controls(gspca_dev); |
| if (ret < 0) |
| goto out; |
| gspca_set_default_mode(gspca_dev); |
| |
| ret = gspca_input_connect(gspca_dev); |
| if (ret) |
| goto out; |
| |
| #ifdef CONFIG_VIDEO_ADV_DEBUG |
| if (!gspca_dev->sd_desc->get_register) |
| v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_DBG_G_REGISTER); |
| if (!gspca_dev->sd_desc->set_register) |
| v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_DBG_S_REGISTER); |
| #endif |
| if (!gspca_dev->sd_desc->get_jcomp) |
| v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_G_JPEGCOMP); |
| if (!gspca_dev->sd_desc->set_jcomp) |
| v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_S_JPEGCOMP); |
| |
| /* init video stuff */ |
| ret = video_register_device(&gspca_dev->vdev, |
| VFL_TYPE_VIDEO, |
| -1); |
| if (ret < 0) { |
| pr_err("video_register_device err %d\n", ret); |
| goto out; |
| } |
| |
| usb_set_intfdata(intf, gspca_dev); |
| gspca_dbg(gspca_dev, D_PROBE, "%s created\n", |
| video_device_node_name(&gspca_dev->vdev)); |
| |
| gspca_input_create_urb(gspca_dev); |
| |
| return 0; |
| out: |
| #if IS_ENABLED(CONFIG_INPUT) |
| if (gspca_dev->input_dev) |
| input_unregister_device(gspca_dev->input_dev); |
| #endif |
| v4l2_ctrl_handler_free(gspca_dev->vdev.ctrl_handler); |
| v4l2_device_unregister(&gspca_dev->v4l2_dev); |
| if (sd_desc->probe_error) |
| sd_desc->probe_error(gspca_dev); |
| kfree(gspca_dev->usb_buf); |
| kfree(gspca_dev); |
| return ret; |
| } |
| EXPORT_SYMBOL(gspca_dev_probe2); |
| |
| /* same function as the previous one, but check the interface */ |
| int gspca_dev_probe(struct usb_interface *intf, |
| const struct usb_device_id *id, |
| const struct sd_desc *sd_desc, |
| int dev_size, |
| struct module *module) |
| { |
| struct usb_device *dev = interface_to_usbdev(intf); |
| |
| /* we don't handle multi-config cameras */ |
| if (dev->descriptor.bNumConfigurations != 1) { |
| pr_err("%04x:%04x too many config\n", |
| id->idVendor, id->idProduct); |
| return -ENODEV; |
| } |
| |
| /* the USB video interface must be the first one */ |
| if (dev->actconfig->desc.bNumInterfaces != 1 |
| && intf->cur_altsetting->desc.bInterfaceNumber != 0) |
| return -ENODEV; |
| |
| return gspca_dev_probe2(intf, id, sd_desc, dev_size, module); |
| } |
| EXPORT_SYMBOL(gspca_dev_probe); |
| |
| /* |
| * USB disconnection |
| * |
| * This function must be called by the sub-driver |
| * when the device disconnects, after the specific resources are freed. |
| */ |
| void gspca_disconnect(struct usb_interface *intf) |
| { |
| struct gspca_dev *gspca_dev = usb_get_intfdata(intf); |
| #if IS_ENABLED(CONFIG_INPUT) |
| struct input_dev *input_dev; |
| #endif |
| |
| gspca_dbg(gspca_dev, D_PROBE, "%s disconnect\n", |
| video_device_node_name(&gspca_dev->vdev)); |
| |
| mutex_lock(&gspca_dev->usb_lock); |
| gspca_dev->present = false; |
| destroy_urbs(gspca_dev); |
| gspca_input_destroy_urb(gspca_dev); |
| |
| vb2_queue_error(&gspca_dev->queue); |
| |
| #if IS_ENABLED(CONFIG_INPUT) |
| input_dev = gspca_dev->input_dev; |
| if (input_dev) { |
| gspca_dev->input_dev = NULL; |
| input_unregister_device(input_dev); |
| } |
| #endif |
| |
| v4l2_device_disconnect(&gspca_dev->v4l2_dev); |
| video_unregister_device(&gspca_dev->vdev); |
| |
| mutex_unlock(&gspca_dev->usb_lock); |
| |
| /* (this will call gspca_release() immediately or on last close) */ |
| v4l2_device_put(&gspca_dev->v4l2_dev); |
| } |
| EXPORT_SYMBOL(gspca_disconnect); |
| |
| #ifdef CONFIG_PM |
| int gspca_suspend(struct usb_interface *intf, pm_message_t message) |
| { |
| struct gspca_dev *gspca_dev = usb_get_intfdata(intf); |
| |
| gspca_input_destroy_urb(gspca_dev); |
| |
| if (!vb2_start_streaming_called(&gspca_dev->queue)) |
| return 0; |
| |
| mutex_lock(&gspca_dev->usb_lock); |
| gspca_dev->frozen = 1; /* avoid urb error messages */ |
| gspca_dev->usb_err = 0; |
| if (gspca_dev->sd_desc->stopN) |
| gspca_dev->sd_desc->stopN(gspca_dev); |
| destroy_urbs(gspca_dev); |
| gspca_set_alt0(gspca_dev); |
| if (gspca_dev->sd_desc->stop0) |
| gspca_dev->sd_desc->stop0(gspca_dev); |
| mutex_unlock(&gspca_dev->usb_lock); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(gspca_suspend); |
| |
| int gspca_resume(struct usb_interface *intf) |
| { |
| struct gspca_dev *gspca_dev = usb_get_intfdata(intf); |
| int streaming, ret = 0; |
| |
| mutex_lock(&gspca_dev->usb_lock); |
| gspca_dev->frozen = 0; |
| gspca_dev->usb_err = 0; |
| gspca_dev->sd_desc->init(gspca_dev); |
| /* |
| * Most subdrivers send all ctrl values on sd_start and thus |
| * only write to the device registers on s_ctrl when streaming -> |
| * Clear streaming to avoid setting all ctrls twice. |
| */ |
| streaming = vb2_start_streaming_called(&gspca_dev->queue); |
| if (streaming) |
| ret = gspca_init_transfer(gspca_dev); |
| else |
| gspca_input_create_urb(gspca_dev); |
| mutex_unlock(&gspca_dev->usb_lock); |
| |
| return ret; |
| } |
| EXPORT_SYMBOL(gspca_resume); |
| #endif |
| |
| /* -- module insert / remove -- */ |
| static int __init gspca_init(void) |
| { |
| pr_info("v" GSPCA_VERSION " registered\n"); |
| return 0; |
| } |
| static void __exit gspca_exit(void) |
| { |
| } |
| |
| module_init(gspca_init); |
| module_exit(gspca_exit); |
| |
| module_param_named(debug, gspca_debug, int, 0644); |
| MODULE_PARM_DESC(debug, |
| "1:probe 2:config 3:stream 4:frame 5:packet 6:usbi 7:usbo"); |