| /**************************************************************************** |
| * |
| * Filename: cpia2_usb.c |
| * |
| * Copyright 2001, STMicrolectronics, Inc. |
| * Contact: steve.miller@st.com |
| * |
| * Description: |
| * This is a USB driver for CPia2 based video cameras. |
| * The infrastructure of this driver is based on the cpia usb driver by |
| * Jochen Scharrlach and Johannes Erdfeldt. |
| * |
| * 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. |
| * |
| * Stripped of 2.4 stuff ready for main kernel submit by |
| * Alan Cox <alan@lxorguk.ukuu.org.uk> |
| ****************************************************************************/ |
| |
| #include <linux/kernel.h> |
| #include <linux/slab.h> |
| #include <linux/usb.h> |
| #include <linux/module.h> |
| |
| #include "cpia2.h" |
| |
| static int frame_sizes[] = { |
| 0, // USBIF_CMDONLY |
| 0, // USBIF_BULK |
| 128, // USBIF_ISO_1 |
| 384, // USBIF_ISO_2 |
| 640, // USBIF_ISO_3 |
| 768, // USBIF_ISO_4 |
| 896, // USBIF_ISO_5 |
| 1023, // USBIF_ISO_6 |
| }; |
| |
| #define FRAMES_PER_DESC 10 |
| #define FRAME_SIZE_PER_DESC frame_sizes[cam->cur_alt] |
| |
| static void process_frame(struct camera_data *cam); |
| static void cpia2_usb_complete(struct urb *urb); |
| static int cpia2_usb_probe(struct usb_interface *intf, |
| const struct usb_device_id *id); |
| static void cpia2_usb_disconnect(struct usb_interface *intf); |
| static int cpia2_usb_suspend(struct usb_interface *intf, pm_message_t message); |
| static int cpia2_usb_resume(struct usb_interface *intf); |
| |
| static void free_sbufs(struct camera_data *cam); |
| static void add_APPn(struct camera_data *cam); |
| static void add_COM(struct camera_data *cam); |
| static int submit_urbs(struct camera_data *cam); |
| static int set_alternate(struct camera_data *cam, unsigned int alt); |
| static int configure_transfer_mode(struct camera_data *cam, unsigned int alt); |
| |
| static struct usb_device_id cpia2_id_table[] = { |
| {USB_DEVICE(0x0553, 0x0100)}, |
| {USB_DEVICE(0x0553, 0x0140)}, |
| {USB_DEVICE(0x0553, 0x0151)}, /* STV0676 */ |
| {} /* Terminating entry */ |
| }; |
| MODULE_DEVICE_TABLE(usb, cpia2_id_table); |
| |
| static struct usb_driver cpia2_driver = { |
| .name = "cpia2", |
| .probe = cpia2_usb_probe, |
| .disconnect = cpia2_usb_disconnect, |
| .suspend = cpia2_usb_suspend, |
| .resume = cpia2_usb_resume, |
| .reset_resume = cpia2_usb_resume, |
| .id_table = cpia2_id_table |
| }; |
| |
| |
| /****************************************************************************** |
| * |
| * process_frame |
| * |
| *****************************************************************************/ |
| static void process_frame(struct camera_data *cam) |
| { |
| static int frame_count; |
| |
| unsigned char *inbuff = cam->workbuff->data; |
| |
| DBG("Processing frame #%d, current:%d\n", |
| cam->workbuff->num, cam->curbuff->num); |
| |
| if(cam->workbuff->length > cam->workbuff->max_length) |
| cam->workbuff->max_length = cam->workbuff->length; |
| |
| if ((inbuff[0] == 0xFF) && (inbuff[1] == 0xD8)) { |
| frame_count++; |
| } else { |
| cam->workbuff->status = FRAME_ERROR; |
| DBG("Start of frame not found\n"); |
| return; |
| } |
| |
| /*** |
| * Now the output buffer should have a JPEG image in it. |
| ***/ |
| if(!cam->first_image_seen) { |
| /* Always skip the first image after streaming |
| * starts. It is almost certainly corrupt. */ |
| cam->first_image_seen = 1; |
| cam->workbuff->status = FRAME_EMPTY; |
| return; |
| } |
| if (cam->workbuff->length > 3) { |
| if(cam->mmapped && |
| cam->workbuff->length < cam->workbuff->max_length) { |
| /* No junk in the buffers */ |
| memset(cam->workbuff->data+cam->workbuff->length, |
| 0, cam->workbuff->max_length- |
| cam->workbuff->length); |
| } |
| cam->workbuff->max_length = cam->workbuff->length; |
| cam->workbuff->status = FRAME_READY; |
| |
| if(!cam->mmapped && cam->num_frames > 2) { |
| /* During normal reading, the most recent |
| * frame will be read. If the current frame |
| * hasn't started reading yet, it will never |
| * be read, so mark it empty. If the buffer is |
| * mmapped, or we have few buffers, we need to |
| * wait for the user to free the buffer. |
| * |
| * NOTE: This is not entirely foolproof with 3 |
| * buffers, but it would take an EXTREMELY |
| * overloaded system to cause problems (possible |
| * image data corruption). Basically, it would |
| * need to take more time to execute cpia2_read |
| * than it would for the camera to send |
| * cam->num_frames-2 frames before problems |
| * could occur. |
| */ |
| cam->curbuff->status = FRAME_EMPTY; |
| } |
| cam->curbuff = cam->workbuff; |
| cam->workbuff = cam->workbuff->next; |
| DBG("Changed buffers, work:%d, current:%d\n", |
| cam->workbuff->num, cam->curbuff->num); |
| return; |
| } else { |
| DBG("Not enough data for an image.\n"); |
| } |
| |
| cam->workbuff->status = FRAME_ERROR; |
| return; |
| } |
| |
| /****************************************************************************** |
| * |
| * add_APPn |
| * |
| * Adds a user specified APPn record |
| *****************************************************************************/ |
| static void add_APPn(struct camera_data *cam) |
| { |
| if(cam->APP_len > 0) { |
| cam->workbuff->data[cam->workbuff->length++] = 0xFF; |
| cam->workbuff->data[cam->workbuff->length++] = 0xE0+cam->APPn; |
| cam->workbuff->data[cam->workbuff->length++] = 0; |
| cam->workbuff->data[cam->workbuff->length++] = cam->APP_len+2; |
| memcpy(cam->workbuff->data+cam->workbuff->length, |
| cam->APP_data, cam->APP_len); |
| cam->workbuff->length += cam->APP_len; |
| } |
| } |
| |
| /****************************************************************************** |
| * |
| * add_COM |
| * |
| * Adds a user specified COM record |
| *****************************************************************************/ |
| static void add_COM(struct camera_data *cam) |
| { |
| if(cam->COM_len > 0) { |
| cam->workbuff->data[cam->workbuff->length++] = 0xFF; |
| cam->workbuff->data[cam->workbuff->length++] = 0xFE; |
| cam->workbuff->data[cam->workbuff->length++] = 0; |
| cam->workbuff->data[cam->workbuff->length++] = cam->COM_len+2; |
| memcpy(cam->workbuff->data+cam->workbuff->length, |
| cam->COM_data, cam->COM_len); |
| cam->workbuff->length += cam->COM_len; |
| } |
| } |
| |
| /****************************************************************************** |
| * |
| * cpia2_usb_complete |
| * |
| * callback when incoming packet is received |
| *****************************************************************************/ |
| static void cpia2_usb_complete(struct urb *urb) |
| { |
| int i; |
| unsigned char *cdata; |
| static bool frame_ready = false; |
| struct camera_data *cam = (struct camera_data *) urb->context; |
| |
| if (urb->status!=0) { |
| if (!(urb->status == -ENOENT || |
| urb->status == -ECONNRESET || |
| urb->status == -ESHUTDOWN)) |
| { |
| DBG("urb->status = %d!\n", urb->status); |
| } |
| DBG("Stopping streaming\n"); |
| return; |
| } |
| |
| if (!cam->streaming || !video_is_registered(&cam->vdev)) { |
| LOG("Will now stop the streaming: streaming = %d, present=%d\n", |
| cam->streaming, video_is_registered(&cam->vdev)); |
| return; |
| } |
| |
| /*** |
| * Packet collater |
| ***/ |
| //DBG("Collating %d packets\n", urb->number_of_packets); |
| for (i = 0; i < urb->number_of_packets; i++) { |
| u16 checksum, iso_checksum; |
| int j; |
| int n = urb->iso_frame_desc[i].actual_length; |
| int st = urb->iso_frame_desc[i].status; |
| |
| if(cam->workbuff->status == FRAME_READY) { |
| struct framebuf *ptr; |
| /* Try to find an available buffer */ |
| DBG("workbuff full, searching\n"); |
| for (ptr = cam->workbuff->next; |
| ptr != cam->workbuff; |
| ptr = ptr->next) |
| { |
| if (ptr->status == FRAME_EMPTY) { |
| ptr->status = FRAME_READING; |
| ptr->length = 0; |
| break; |
| } |
| } |
| if (ptr == cam->workbuff) |
| break; /* No READING or EMPTY buffers left */ |
| |
| cam->workbuff = ptr; |
| } |
| |
| if (cam->workbuff->status == FRAME_EMPTY || |
| cam->workbuff->status == FRAME_ERROR) { |
| cam->workbuff->status = FRAME_READING; |
| cam->workbuff->length = 0; |
| } |
| |
| //DBG(" Packet %d length = %d, status = %d\n", i, n, st); |
| cdata = urb->transfer_buffer + urb->iso_frame_desc[i].offset; |
| |
| if (st) { |
| LOG("cpia2 data error: [%d] len=%d, status = %d\n", |
| i, n, st); |
| if(!ALLOW_CORRUPT) |
| cam->workbuff->status = FRAME_ERROR; |
| continue; |
| } |
| |
| if(n<=2) |
| continue; |
| |
| checksum = 0; |
| for(j=0; j<n-2; ++j) |
| checksum += cdata[j]; |
| iso_checksum = cdata[j] + cdata[j+1]*256; |
| if(checksum != iso_checksum) { |
| LOG("checksum mismatch: [%d] len=%d, calculated = %x, checksum = %x\n", |
| i, n, (int)checksum, (int)iso_checksum); |
| if(!ALLOW_CORRUPT) { |
| cam->workbuff->status = FRAME_ERROR; |
| continue; |
| } |
| } |
| n -= 2; |
| |
| if(cam->workbuff->status != FRAME_READING) { |
| if((0xFF == cdata[0] && 0xD8 == cdata[1]) || |
| (0xD8 == cdata[0] && 0xFF == cdata[1] && |
| 0 != cdata[2])) { |
| /* frame is skipped, but increment total |
| * frame count anyway */ |
| cam->frame_count++; |
| } |
| DBG("workbuff not reading, status=%d\n", |
| cam->workbuff->status); |
| continue; |
| } |
| |
| if (cam->frame_size < cam->workbuff->length + n) { |
| ERR("buffer overflow! length: %d, n: %d\n", |
| cam->workbuff->length, n); |
| cam->workbuff->status = FRAME_ERROR; |
| if(cam->workbuff->length > cam->workbuff->max_length) |
| cam->workbuff->max_length = |
| cam->workbuff->length; |
| continue; |
| } |
| |
| if (cam->workbuff->length == 0) { |
| int data_offset; |
| if ((0xD8 == cdata[0]) && (0xFF == cdata[1])) { |
| data_offset = 1; |
| } else if((0xFF == cdata[0]) && (0xD8 == cdata[1]) |
| && (0xFF == cdata[2])) { |
| data_offset = 2; |
| } else { |
| DBG("Ignoring packet, not beginning!\n"); |
| continue; |
| } |
| DBG("Start of frame pattern found\n"); |
| v4l2_get_timestamp(&cam->workbuff->timestamp); |
| cam->workbuff->seq = cam->frame_count++; |
| cam->workbuff->data[0] = 0xFF; |
| cam->workbuff->data[1] = 0xD8; |
| cam->workbuff->length = 2; |
| add_APPn(cam); |
| add_COM(cam); |
| memcpy(cam->workbuff->data+cam->workbuff->length, |
| cdata+data_offset, n-data_offset); |
| cam->workbuff->length += n-data_offset; |
| } else if (cam->workbuff->length > 0) { |
| memcpy(cam->workbuff->data + cam->workbuff->length, |
| cdata, n); |
| cam->workbuff->length += n; |
| } |
| |
| if ((cam->workbuff->length >= 3) && |
| (cam->workbuff->data[cam->workbuff->length - 3] == 0xFF) && |
| (cam->workbuff->data[cam->workbuff->length - 2] == 0xD9) && |
| (cam->workbuff->data[cam->workbuff->length - 1] == 0xFF)) { |
| frame_ready = true; |
| cam->workbuff->data[cam->workbuff->length - 1] = 0; |
| cam->workbuff->length -= 1; |
| } else if ((cam->workbuff->length >= 2) && |
| (cam->workbuff->data[cam->workbuff->length - 2] == 0xFF) && |
| (cam->workbuff->data[cam->workbuff->length - 1] == 0xD9)) { |
| frame_ready = true; |
| } |
| |
| if (frame_ready) { |
| DBG("Workbuff image size = %d\n",cam->workbuff->length); |
| process_frame(cam); |
| |
| frame_ready = false; |
| |
| if (waitqueue_active(&cam->wq_stream)) |
| wake_up_interruptible(&cam->wq_stream); |
| } |
| } |
| |
| if(cam->streaming) { |
| /* resubmit */ |
| urb->dev = cam->dev; |
| if ((i = usb_submit_urb(urb, GFP_ATOMIC)) != 0) |
| ERR("%s: usb_submit_urb ret %d!\n", __func__, i); |
| } |
| } |
| |
| /****************************************************************************** |
| * |
| * configure_transfer_mode |
| * |
| *****************************************************************************/ |
| static int configure_transfer_mode(struct camera_data *cam, unsigned int alt) |
| { |
| static unsigned char iso_regs[8][4] = { |
| {0x00, 0x00, 0x00, 0x00}, |
| {0x00, 0x00, 0x00, 0x00}, |
| {0xB9, 0x00, 0x00, 0x7E}, |
| {0xB9, 0x00, 0x01, 0x7E}, |
| {0xB9, 0x00, 0x02, 0x7E}, |
| {0xB9, 0x00, 0x02, 0xFE}, |
| {0xB9, 0x00, 0x03, 0x7E}, |
| {0xB9, 0x00, 0x03, 0xFD} |
| }; |
| struct cpia2_command cmd; |
| unsigned char reg; |
| |
| if (!video_is_registered(&cam->vdev)) |
| return -ENODEV; |
| |
| /*** |
| * Write the isoc registers according to the alternate selected |
| ***/ |
| cmd.direction = TRANSFER_WRITE; |
| cmd.buffer.block_data[0] = iso_regs[alt][0]; |
| cmd.buffer.block_data[1] = iso_regs[alt][1]; |
| cmd.buffer.block_data[2] = iso_regs[alt][2]; |
| cmd.buffer.block_data[3] = iso_regs[alt][3]; |
| cmd.req_mode = CAMERAACCESS_TYPE_BLOCK | CAMERAACCESS_VC; |
| cmd.start = CPIA2_VC_USB_ISOLIM; |
| cmd.reg_count = 4; |
| cpia2_send_command(cam, &cmd); |
| |
| /*** |
| * Enable relevant streams before starting polling. |
| * First read USB Stream Config Register. |
| ***/ |
| cmd.direction = TRANSFER_READ; |
| cmd.req_mode = CAMERAACCESS_TYPE_BLOCK | CAMERAACCESS_VC; |
| cmd.start = CPIA2_VC_USB_STRM; |
| cmd.reg_count = 1; |
| cpia2_send_command(cam, &cmd); |
| reg = cmd.buffer.block_data[0]; |
| |
| /* Clear iso, bulk, and int */ |
| reg &= ~(CPIA2_VC_USB_STRM_BLK_ENABLE | |
| CPIA2_VC_USB_STRM_ISO_ENABLE | |
| CPIA2_VC_USB_STRM_INT_ENABLE); |
| |
| if (alt == USBIF_BULK) { |
| DBG("Enabling bulk xfer\n"); |
| reg |= CPIA2_VC_USB_STRM_BLK_ENABLE; /* Enable Bulk */ |
| cam->xfer_mode = XFER_BULK; |
| } else if (alt >= USBIF_ISO_1) { |
| DBG("Enabling ISOC xfer\n"); |
| reg |= CPIA2_VC_USB_STRM_ISO_ENABLE; |
| cam->xfer_mode = XFER_ISOC; |
| } |
| |
| cmd.buffer.block_data[0] = reg; |
| cmd.direction = TRANSFER_WRITE; |
| cmd.start = CPIA2_VC_USB_STRM; |
| cmd.reg_count = 1; |
| cmd.req_mode = CAMERAACCESS_TYPE_BLOCK | CAMERAACCESS_VC; |
| cpia2_send_command(cam, &cmd); |
| |
| return 0; |
| } |
| |
| /****************************************************************************** |
| * |
| * cpia2_usb_change_streaming_alternate |
| * |
| *****************************************************************************/ |
| int cpia2_usb_change_streaming_alternate(struct camera_data *cam, |
| unsigned int alt) |
| { |
| int ret = 0; |
| |
| if(alt < USBIF_ISO_1 || alt > USBIF_ISO_6) |
| return -EINVAL; |
| |
| if(alt == cam->params.camera_state.stream_mode) |
| return 0; |
| |
| cpia2_usb_stream_pause(cam); |
| |
| configure_transfer_mode(cam, alt); |
| |
| cam->params.camera_state.stream_mode = alt; |
| |
| /* Reset the camera to prevent image quality degradation */ |
| cpia2_reset_camera(cam); |
| |
| cpia2_usb_stream_resume(cam); |
| |
| return ret; |
| } |
| |
| /****************************************************************************** |
| * |
| * set_alternate |
| * |
| *****************************************************************************/ |
| static int set_alternate(struct camera_data *cam, unsigned int alt) |
| { |
| int ret = 0; |
| |
| if(alt == cam->cur_alt) |
| return 0; |
| |
| if (cam->cur_alt != USBIF_CMDONLY) { |
| DBG("Changing from alt %d to %d\n", cam->cur_alt, USBIF_CMDONLY); |
| ret = usb_set_interface(cam->dev, cam->iface, USBIF_CMDONLY); |
| if (ret != 0) |
| return ret; |
| } |
| if (alt != USBIF_CMDONLY) { |
| DBG("Changing from alt %d to %d\n", USBIF_CMDONLY, alt); |
| ret = usb_set_interface(cam->dev, cam->iface, alt); |
| if (ret != 0) |
| return ret; |
| } |
| |
| cam->old_alt = cam->cur_alt; |
| cam->cur_alt = alt; |
| |
| return ret; |
| } |
| |
| /****************************************************************************** |
| * |
| * free_sbufs |
| * |
| * Free all cam->sbuf[]. All non-NULL .data and .urb members that are non-NULL |
| * are assumed to be allocated. Non-NULL .urb members are also assumed to be |
| * submitted (and must therefore be killed before they are freed). |
| *****************************************************************************/ |
| static void free_sbufs(struct camera_data *cam) |
| { |
| int i; |
| |
| for (i = 0; i < NUM_SBUF; i++) { |
| if(cam->sbuf[i].urb) { |
| usb_kill_urb(cam->sbuf[i].urb); |
| usb_free_urb(cam->sbuf[i].urb); |
| cam->sbuf[i].urb = NULL; |
| } |
| if(cam->sbuf[i].data) { |
| kfree(cam->sbuf[i].data); |
| cam->sbuf[i].data = NULL; |
| } |
| } |
| } |
| |
| /******* |
| * Convenience functions |
| *******/ |
| /**************************************************************************** |
| * |
| * write_packet |
| * |
| ***************************************************************************/ |
| static int write_packet(struct usb_device *udev, |
| u8 request, u8 * registers, u16 start, size_t size) |
| { |
| unsigned char *buf; |
| int ret; |
| |
| if (!registers || size <= 0) |
| return -EINVAL; |
| |
| buf = kmalloc(size, GFP_KERNEL); |
| if (!buf) |
| return -ENOMEM; |
| |
| memcpy(buf, registers, size); |
| |
| ret = usb_control_msg(udev, |
| usb_sndctrlpipe(udev, 0), |
| request, |
| USB_TYPE_VENDOR | USB_RECIP_DEVICE, |
| start, /* value */ |
| 0, /* index */ |
| buf, /* buffer */ |
| size, |
| HZ); |
| |
| kfree(buf); |
| return ret; |
| } |
| |
| /**************************************************************************** |
| * |
| * read_packet |
| * |
| ***************************************************************************/ |
| static int read_packet(struct usb_device *udev, |
| u8 request, u8 * registers, u16 start, size_t size) |
| { |
| unsigned char *buf; |
| int ret; |
| |
| if (!registers || size <= 0) |
| return -EINVAL; |
| |
| buf = kmalloc(size, GFP_KERNEL); |
| if (!buf) |
| return -ENOMEM; |
| |
| ret = usb_control_msg(udev, |
| usb_rcvctrlpipe(udev, 0), |
| request, |
| USB_DIR_IN|USB_TYPE_VENDOR|USB_RECIP_DEVICE, |
| start, /* value */ |
| 0, /* index */ |
| buf, /* buffer */ |
| size, |
| HZ); |
| |
| if (ret >= 0) |
| memcpy(registers, buf, size); |
| |
| kfree(buf); |
| |
| return ret; |
| } |
| |
| /****************************************************************************** |
| * |
| * cpia2_usb_transfer_cmd |
| * |
| *****************************************************************************/ |
| int cpia2_usb_transfer_cmd(struct camera_data *cam, |
| void *registers, |
| u8 request, u8 start, u8 count, u8 direction) |
| { |
| int err = 0; |
| struct usb_device *udev = cam->dev; |
| |
| if (!udev) { |
| ERR("%s: Internal driver error: udev is NULL\n", __func__); |
| return -EINVAL; |
| } |
| |
| if (!registers) { |
| ERR("%s: Internal driver error: register array is NULL\n", __func__); |
| return -EINVAL; |
| } |
| |
| if (direction == TRANSFER_READ) { |
| err = read_packet(udev, request, (u8 *)registers, start, count); |
| if (err > 0) |
| err = 0; |
| } else if (direction == TRANSFER_WRITE) { |
| err =write_packet(udev, request, (u8 *)registers, start, count); |
| if (err < 0) { |
| LOG("Control message failed, err val = %d\n", err); |
| LOG("Message: request = 0x%0X, start = 0x%0X\n", |
| request, start); |
| LOG("Message: count = %d, register[0] = 0x%0X\n", |
| count, ((unsigned char *) registers)[0]); |
| } else |
| err=0; |
| } else { |
| LOG("Unexpected first byte of direction: %d\n", |
| direction); |
| return -EINVAL; |
| } |
| |
| if(err != 0) |
| LOG("Unexpected error: %d\n", err); |
| return err; |
| } |
| |
| |
| /****************************************************************************** |
| * |
| * submit_urbs |
| * |
| *****************************************************************************/ |
| static int submit_urbs(struct camera_data *cam) |
| { |
| struct urb *urb; |
| int fx, err, i, j; |
| |
| for(i=0; i<NUM_SBUF; ++i) { |
| if (cam->sbuf[i].data) |
| continue; |
| cam->sbuf[i].data = |
| kmalloc(FRAMES_PER_DESC * FRAME_SIZE_PER_DESC, GFP_KERNEL); |
| if (!cam->sbuf[i].data) { |
| while (--i >= 0) { |
| kfree(cam->sbuf[i].data); |
| cam->sbuf[i].data = NULL; |
| } |
| return -ENOMEM; |
| } |
| } |
| |
| /* We double buffer the Isoc lists, and also know the polling |
| * interval is every frame (1 == (1 << (bInterval -1))). |
| */ |
| for(i=0; i<NUM_SBUF; ++i) { |
| if(cam->sbuf[i].urb) { |
| continue; |
| } |
| urb = usb_alloc_urb(FRAMES_PER_DESC, GFP_KERNEL); |
| if (!urb) { |
| for (j = 0; j < i; j++) |
| usb_free_urb(cam->sbuf[j].urb); |
| return -ENOMEM; |
| } |
| |
| cam->sbuf[i].urb = urb; |
| urb->dev = cam->dev; |
| urb->context = cam; |
| urb->pipe = usb_rcvisocpipe(cam->dev, 1 /*ISOC endpoint*/); |
| urb->transfer_flags = URB_ISO_ASAP; |
| urb->transfer_buffer = cam->sbuf[i].data; |
| urb->complete = cpia2_usb_complete; |
| urb->number_of_packets = FRAMES_PER_DESC; |
| urb->interval = 1; |
| urb->transfer_buffer_length = |
| FRAME_SIZE_PER_DESC * FRAMES_PER_DESC; |
| |
| for (fx = 0; fx < FRAMES_PER_DESC; fx++) { |
| urb->iso_frame_desc[fx].offset = |
| FRAME_SIZE_PER_DESC * fx; |
| urb->iso_frame_desc[fx].length = FRAME_SIZE_PER_DESC; |
| } |
| } |
| |
| |
| /* Queue the ISO urbs, and resubmit in the completion handler */ |
| for(i=0; i<NUM_SBUF; ++i) { |
| err = usb_submit_urb(cam->sbuf[i].urb, GFP_KERNEL); |
| if (err) { |
| ERR("usb_submit_urb[%d]() = %d\n", i, err); |
| return err; |
| } |
| } |
| |
| return 0; |
| } |
| |
| /****************************************************************************** |
| * |
| * cpia2_usb_stream_start |
| * |
| *****************************************************************************/ |
| int cpia2_usb_stream_start(struct camera_data *cam, unsigned int alternate) |
| { |
| int ret; |
| int old_alt; |
| |
| if(cam->streaming) |
| return 0; |
| |
| if (cam->flush) { |
| int i; |
| DBG("Flushing buffers\n"); |
| for(i=0; i<cam->num_frames; ++i) { |
| cam->buffers[i].status = FRAME_EMPTY; |
| cam->buffers[i].length = 0; |
| } |
| cam->curbuff = &cam->buffers[0]; |
| cam->workbuff = cam->curbuff->next; |
| cam->flush = false; |
| } |
| |
| old_alt = cam->params.camera_state.stream_mode; |
| cam->params.camera_state.stream_mode = 0; |
| ret = cpia2_usb_change_streaming_alternate(cam, alternate); |
| if (ret < 0) { |
| int ret2; |
| ERR("cpia2_usb_change_streaming_alternate() = %d!\n", ret); |
| cam->params.camera_state.stream_mode = old_alt; |
| ret2 = set_alternate(cam, USBIF_CMDONLY); |
| if (ret2 < 0) { |
| ERR("cpia2_usb_change_streaming_alternate(%d) =%d has already " |
| "failed. Then tried to call " |
| "set_alternate(USBIF_CMDONLY) = %d.\n", |
| alternate, ret, ret2); |
| } |
| } else { |
| cam->frame_count = 0; |
| cam->streaming = 1; |
| ret = cpia2_usb_stream_resume(cam); |
| } |
| return ret; |
| } |
| |
| /****************************************************************************** |
| * |
| * cpia2_usb_stream_pause |
| * |
| *****************************************************************************/ |
| int cpia2_usb_stream_pause(struct camera_data *cam) |
| { |
| int ret = 0; |
| if(cam->streaming) { |
| free_sbufs(cam); |
| ret = set_alternate(cam, USBIF_CMDONLY); |
| } |
| return ret; |
| } |
| |
| /****************************************************************************** |
| * |
| * cpia2_usb_stream_resume |
| * |
| *****************************************************************************/ |
| int cpia2_usb_stream_resume(struct camera_data *cam) |
| { |
| int ret = 0; |
| if(cam->streaming) { |
| cam->first_image_seen = 0; |
| ret = set_alternate(cam, cam->params.camera_state.stream_mode); |
| if(ret == 0) { |
| /* for some reason the user effects need to be set |
| again when starting streaming. */ |
| cpia2_do_command(cam, CPIA2_CMD_SET_USER_EFFECTS, TRANSFER_WRITE, |
| cam->params.vp_params.user_effects); |
| ret = submit_urbs(cam); |
| } |
| } |
| return ret; |
| } |
| |
| /****************************************************************************** |
| * |
| * cpia2_usb_stream_stop |
| * |
| *****************************************************************************/ |
| int cpia2_usb_stream_stop(struct camera_data *cam) |
| { |
| int ret; |
| |
| ret = cpia2_usb_stream_pause(cam); |
| cam->streaming = 0; |
| configure_transfer_mode(cam, 0); |
| return ret; |
| } |
| |
| /****************************************************************************** |
| * |
| * cpia2_usb_probe |
| * |
| * Probe and initialize. |
| *****************************************************************************/ |
| static int cpia2_usb_probe(struct usb_interface *intf, |
| const struct usb_device_id *id) |
| { |
| struct usb_device *udev = interface_to_usbdev(intf); |
| struct usb_interface_descriptor *interface; |
| struct camera_data *cam; |
| int ret; |
| |
| /* A multi-config CPiA2 camera? */ |
| if (udev->descriptor.bNumConfigurations != 1) |
| return -ENODEV; |
| interface = &intf->cur_altsetting->desc; |
| |
| /* If we get to this point, we found a CPiA2 camera */ |
| LOG("CPiA2 USB camera found\n"); |
| |
| cam = cpia2_init_camera_struct(intf); |
| if (cam == NULL) |
| return -ENOMEM; |
| |
| cam->dev = udev; |
| cam->iface = interface->bInterfaceNumber; |
| |
| ret = set_alternate(cam, USBIF_CMDONLY); |
| if (ret < 0) { |
| ERR("%s: usb_set_interface error (ret = %d)\n", __func__, ret); |
| kfree(cam); |
| return ret; |
| } |
| |
| |
| if((ret = cpia2_init_camera(cam)) < 0) { |
| ERR("%s: failed to initialize cpia2 camera (ret = %d)\n", __func__, ret); |
| kfree(cam); |
| return ret; |
| } |
| LOG(" CPiA Version: %d.%02d (%d.%d)\n", |
| cam->params.version.firmware_revision_hi, |
| cam->params.version.firmware_revision_lo, |
| cam->params.version.asic_id, |
| cam->params.version.asic_rev); |
| LOG(" CPiA PnP-ID: %04x:%04x:%04x\n", |
| cam->params.pnp_id.vendor, |
| cam->params.pnp_id.product, |
| cam->params.pnp_id.device_revision); |
| LOG(" SensorID: %d.(version %d)\n", |
| cam->params.version.sensor_flags, |
| cam->params.version.sensor_rev); |
| |
| usb_set_intfdata(intf, cam); |
| |
| ret = cpia2_register_camera(cam); |
| if (ret < 0) { |
| ERR("%s: Failed to register cpia2 camera (ret = %d)\n", __func__, ret); |
| kfree(cam); |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| /****************************************************************************** |
| * |
| * cpia2_disconnect |
| * |
| *****************************************************************************/ |
| static void cpia2_usb_disconnect(struct usb_interface *intf) |
| { |
| struct camera_data *cam = usb_get_intfdata(intf); |
| usb_set_intfdata(intf, NULL); |
| |
| DBG("Stopping stream\n"); |
| cpia2_usb_stream_stop(cam); |
| |
| mutex_lock(&cam->v4l2_lock); |
| DBG("Unregistering camera\n"); |
| cpia2_unregister_camera(cam); |
| v4l2_device_disconnect(&cam->v4l2_dev); |
| mutex_unlock(&cam->v4l2_lock); |
| v4l2_device_put(&cam->v4l2_dev); |
| |
| if(cam->buffers) { |
| DBG("Wakeup waiting processes\n"); |
| cam->curbuff->status = FRAME_READY; |
| cam->curbuff->length = 0; |
| wake_up_interruptible(&cam->wq_stream); |
| } |
| |
| DBG("Releasing interface\n"); |
| usb_driver_release_interface(&cpia2_driver, intf); |
| |
| LOG("CPiA2 camera disconnected.\n"); |
| } |
| |
| static int cpia2_usb_suspend(struct usb_interface *intf, pm_message_t message) |
| { |
| struct camera_data *cam = usb_get_intfdata(intf); |
| |
| mutex_lock(&cam->v4l2_lock); |
| if (cam->streaming) { |
| cpia2_usb_stream_stop(cam); |
| cam->streaming = 1; |
| } |
| mutex_unlock(&cam->v4l2_lock); |
| |
| dev_info(&intf->dev, "going into suspend..\n"); |
| return 0; |
| } |
| |
| /* Resume device - start device. */ |
| static int cpia2_usb_resume(struct usb_interface *intf) |
| { |
| struct camera_data *cam = usb_get_intfdata(intf); |
| |
| mutex_lock(&cam->v4l2_lock); |
| v4l2_ctrl_handler_setup(&cam->hdl); |
| if (cam->streaming) { |
| cam->streaming = 0; |
| cpia2_usb_stream_start(cam, |
| cam->params.camera_state.stream_mode); |
| } |
| mutex_unlock(&cam->v4l2_lock); |
| |
| dev_info(&intf->dev, "coming out of suspend..\n"); |
| return 0; |
| } |
| |
| /****************************************************************************** |
| * |
| * usb_cpia2_init |
| * |
| *****************************************************************************/ |
| int cpia2_usb_init(void) |
| { |
| return usb_register(&cpia2_driver); |
| } |
| |
| /****************************************************************************** |
| * |
| * usb_cpia_cleanup |
| * |
| *****************************************************************************/ |
| void cpia2_usb_cleanup(void) |
| { |
| schedule_timeout(2 * HZ); |
| usb_deregister(&cpia2_driver); |
| } |