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965 lines
26 KiB
965 lines
26 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/**************************************************************************** |
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* |
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* Filename: cpia2_usb.c |
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* |
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* Copyright 2001, STMicrolectronics, Inc. |
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* Contact: [email protected] |
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* |
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* Description: |
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* This is a USB driver for CPia2 based video cameras. |
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* The infrastructure of this driver is based on the cpia usb driver by |
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* Jochen Scharrlach and Johannes Erdfeldt. |
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* |
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* Stripped of 2.4 stuff ready for main kernel submit by |
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* Alan Cox <[email protected]> |
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****************************************************************************/ |
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|
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#include <linux/kernel.h> |
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#include <linux/slab.h> |
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#include <linux/usb.h> |
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#include <linux/module.h> |
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|
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#include "cpia2.h" |
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|
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static int frame_sizes[] = { |
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0, // USBIF_CMDONLY |
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0, // USBIF_BULK |
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128, // USBIF_ISO_1 |
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384, // USBIF_ISO_2 |
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640, // USBIF_ISO_3 |
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768, // USBIF_ISO_4 |
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896, // USBIF_ISO_5 |
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1023, // USBIF_ISO_6 |
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}; |
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|
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#define FRAMES_PER_DESC 10 |
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#define FRAME_SIZE_PER_DESC frame_sizes[cam->cur_alt] |
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|
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static void process_frame(struct camera_data *cam); |
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static void cpia2_usb_complete(struct urb *urb); |
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static int cpia2_usb_probe(struct usb_interface *intf, |
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const struct usb_device_id *id); |
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static void cpia2_usb_disconnect(struct usb_interface *intf); |
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static int cpia2_usb_suspend(struct usb_interface *intf, pm_message_t message); |
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static int cpia2_usb_resume(struct usb_interface *intf); |
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|
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static void free_sbufs(struct camera_data *cam); |
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static void add_APPn(struct camera_data *cam); |
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static void add_COM(struct camera_data *cam); |
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static int submit_urbs(struct camera_data *cam); |
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static int set_alternate(struct camera_data *cam, unsigned int alt); |
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static int configure_transfer_mode(struct camera_data *cam, unsigned int alt); |
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|
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static const struct usb_device_id cpia2_id_table[] = { |
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{USB_DEVICE(0x0553, 0x0100)}, |
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{USB_DEVICE(0x0553, 0x0140)}, |
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{USB_DEVICE(0x0553, 0x0151)}, /* STV0676 */ |
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{} /* Terminating entry */ |
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}; |
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MODULE_DEVICE_TABLE(usb, cpia2_id_table); |
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|
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static struct usb_driver cpia2_driver = { |
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.name = "cpia2", |
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.probe = cpia2_usb_probe, |
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.disconnect = cpia2_usb_disconnect, |
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.suspend = cpia2_usb_suspend, |
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.resume = cpia2_usb_resume, |
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.reset_resume = cpia2_usb_resume, |
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.id_table = cpia2_id_table |
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}; |
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|
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/****************************************************************************** |
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* |
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* process_frame |
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* |
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*****************************************************************************/ |
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static void process_frame(struct camera_data *cam) |
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{ |
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static int frame_count; |
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|
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unsigned char *inbuff = cam->workbuff->data; |
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|
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DBG("Processing frame #%d, current:%d\n", |
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cam->workbuff->num, cam->curbuff->num); |
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|
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if(cam->workbuff->length > cam->workbuff->max_length) |
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cam->workbuff->max_length = cam->workbuff->length; |
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|
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if ((inbuff[0] == 0xFF) && (inbuff[1] == 0xD8)) { |
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frame_count++; |
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} else { |
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cam->workbuff->status = FRAME_ERROR; |
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DBG("Start of frame not found\n"); |
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return; |
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} |
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|
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/*** |
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* Now the output buffer should have a JPEG image in it. |
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***/ |
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if(!cam->first_image_seen) { |
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/* Always skip the first image after streaming |
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* starts. It is almost certainly corrupt. */ |
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cam->first_image_seen = 1; |
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cam->workbuff->status = FRAME_EMPTY; |
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return; |
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} |
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if (cam->workbuff->length > 3) { |
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if(cam->mmapped && |
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cam->workbuff->length < cam->workbuff->max_length) { |
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/* No junk in the buffers */ |
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memset(cam->workbuff->data+cam->workbuff->length, |
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0, cam->workbuff->max_length- |
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cam->workbuff->length); |
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} |
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cam->workbuff->max_length = cam->workbuff->length; |
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cam->workbuff->status = FRAME_READY; |
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|
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if(!cam->mmapped && cam->num_frames > 2) { |
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/* During normal reading, the most recent |
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* frame will be read. If the current frame |
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* hasn't started reading yet, it will never |
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* be read, so mark it empty. If the buffer is |
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* mmapped, or we have few buffers, we need to |
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* wait for the user to free the buffer. |
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* |
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* NOTE: This is not entirely foolproof with 3 |
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* buffers, but it would take an EXTREMELY |
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* overloaded system to cause problems (possible |
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* image data corruption). Basically, it would |
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* need to take more time to execute cpia2_read |
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* than it would for the camera to send |
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* cam->num_frames-2 frames before problems |
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* could occur. |
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*/ |
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cam->curbuff->status = FRAME_EMPTY; |
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} |
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cam->curbuff = cam->workbuff; |
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cam->workbuff = cam->workbuff->next; |
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DBG("Changed buffers, work:%d, current:%d\n", |
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cam->workbuff->num, cam->curbuff->num); |
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return; |
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} else { |
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DBG("Not enough data for an image.\n"); |
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} |
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cam->workbuff->status = FRAME_ERROR; |
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return; |
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} |
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|
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/****************************************************************************** |
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* |
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* add_APPn |
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* |
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* Adds a user specified APPn record |
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*****************************************************************************/ |
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static void add_APPn(struct camera_data *cam) |
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{ |
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if(cam->APP_len > 0) { |
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cam->workbuff->data[cam->workbuff->length++] = 0xFF; |
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cam->workbuff->data[cam->workbuff->length++] = 0xE0+cam->APPn; |
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cam->workbuff->data[cam->workbuff->length++] = 0; |
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cam->workbuff->data[cam->workbuff->length++] = cam->APP_len+2; |
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memcpy(cam->workbuff->data+cam->workbuff->length, |
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cam->APP_data, cam->APP_len); |
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cam->workbuff->length += cam->APP_len; |
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} |
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} |
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|
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/****************************************************************************** |
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* |
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* add_COM |
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* |
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* Adds a user specified COM record |
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*****************************************************************************/ |
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static void add_COM(struct camera_data *cam) |
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{ |
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if(cam->COM_len > 0) { |
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cam->workbuff->data[cam->workbuff->length++] = 0xFF; |
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cam->workbuff->data[cam->workbuff->length++] = 0xFE; |
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cam->workbuff->data[cam->workbuff->length++] = 0; |
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cam->workbuff->data[cam->workbuff->length++] = cam->COM_len+2; |
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memcpy(cam->workbuff->data+cam->workbuff->length, |
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cam->COM_data, cam->COM_len); |
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cam->workbuff->length += cam->COM_len; |
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} |
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} |
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|
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/****************************************************************************** |
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* |
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* cpia2_usb_complete |
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* |
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* callback when incoming packet is received |
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*****************************************************************************/ |
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static void cpia2_usb_complete(struct urb *urb) |
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{ |
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int i; |
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unsigned char *cdata; |
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static bool frame_ready = false; |
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struct camera_data *cam = (struct camera_data *) urb->context; |
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|
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if (urb->status!=0) { |
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if (!(urb->status == -ENOENT || |
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urb->status == -ECONNRESET || |
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urb->status == -ESHUTDOWN)) |
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{ |
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DBG("urb->status = %d!\n", urb->status); |
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} |
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DBG("Stopping streaming\n"); |
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return; |
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} |
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|
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if (!cam->streaming || !video_is_registered(&cam->vdev)) { |
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LOG("Will now stop the streaming: streaming = %d, present=%d\n", |
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cam->streaming, video_is_registered(&cam->vdev)); |
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return; |
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} |
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/*** |
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* Packet collater |
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***/ |
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//DBG("Collating %d packets\n", urb->number_of_packets); |
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for (i = 0; i < urb->number_of_packets; i++) { |
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u16 checksum, iso_checksum; |
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int j; |
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int n = urb->iso_frame_desc[i].actual_length; |
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int st = urb->iso_frame_desc[i].status; |
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|
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if(cam->workbuff->status == FRAME_READY) { |
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struct framebuf *ptr; |
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/* Try to find an available buffer */ |
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DBG("workbuff full, searching\n"); |
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for (ptr = cam->workbuff->next; |
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ptr != cam->workbuff; |
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ptr = ptr->next) |
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{ |
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if (ptr->status == FRAME_EMPTY) { |
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ptr->status = FRAME_READING; |
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ptr->length = 0; |
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break; |
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} |
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} |
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if (ptr == cam->workbuff) |
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break; /* No READING or EMPTY buffers left */ |
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cam->workbuff = ptr; |
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} |
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if (cam->workbuff->status == FRAME_EMPTY || |
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cam->workbuff->status == FRAME_ERROR) { |
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cam->workbuff->status = FRAME_READING; |
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cam->workbuff->length = 0; |
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} |
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//DBG(" Packet %d length = %d, status = %d\n", i, n, st); |
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cdata = urb->transfer_buffer + urb->iso_frame_desc[i].offset; |
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|
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if (st) { |
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LOG("cpia2 data error: [%d] len=%d, status = %d\n", |
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i, n, st); |
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if(!ALLOW_CORRUPT) |
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cam->workbuff->status = FRAME_ERROR; |
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continue; |
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} |
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if(n<=2) |
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continue; |
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checksum = 0; |
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for(j=0; j<n-2; ++j) |
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checksum += cdata[j]; |
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iso_checksum = cdata[j] + cdata[j+1]*256; |
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if(checksum != iso_checksum) { |
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LOG("checksum mismatch: [%d] len=%d, calculated = %x, checksum = %x\n", |
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i, n, (int)checksum, (int)iso_checksum); |
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if(!ALLOW_CORRUPT) { |
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cam->workbuff->status = FRAME_ERROR; |
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continue; |
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} |
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} |
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n -= 2; |
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|
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if(cam->workbuff->status != FRAME_READING) { |
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if((0xFF == cdata[0] && 0xD8 == cdata[1]) || |
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(0xD8 == cdata[0] && 0xFF == cdata[1] && |
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0 != cdata[2])) { |
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/* frame is skipped, but increment total |
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* frame count anyway */ |
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cam->frame_count++; |
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} |
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DBG("workbuff not reading, status=%d\n", |
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cam->workbuff->status); |
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continue; |
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} |
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if (cam->frame_size < cam->workbuff->length + n) { |
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ERR("buffer overflow! length: %d, n: %d\n", |
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cam->workbuff->length, n); |
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cam->workbuff->status = FRAME_ERROR; |
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if(cam->workbuff->length > cam->workbuff->max_length) |
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cam->workbuff->max_length = |
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cam->workbuff->length; |
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continue; |
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} |
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if (cam->workbuff->length == 0) { |
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int data_offset; |
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if ((0xD8 == cdata[0]) && (0xFF == cdata[1])) { |
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data_offset = 1; |
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} else if((0xFF == cdata[0]) && (0xD8 == cdata[1]) |
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&& (0xFF == cdata[2])) { |
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data_offset = 2; |
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} else { |
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DBG("Ignoring packet, not beginning!\n"); |
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continue; |
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} |
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DBG("Start of frame pattern found\n"); |
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cam->workbuff->ts = ktime_get_ns(); |
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cam->workbuff->seq = cam->frame_count++; |
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cam->workbuff->data[0] = 0xFF; |
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cam->workbuff->data[1] = 0xD8; |
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cam->workbuff->length = 2; |
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add_APPn(cam); |
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add_COM(cam); |
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memcpy(cam->workbuff->data+cam->workbuff->length, |
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cdata+data_offset, n-data_offset); |
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cam->workbuff->length += n-data_offset; |
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} else if (cam->workbuff->length > 0) { |
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memcpy(cam->workbuff->data + cam->workbuff->length, |
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cdata, n); |
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cam->workbuff->length += n; |
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} |
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if ((cam->workbuff->length >= 3) && |
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(cam->workbuff->data[cam->workbuff->length - 3] == 0xFF) && |
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(cam->workbuff->data[cam->workbuff->length - 2] == 0xD9) && |
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(cam->workbuff->data[cam->workbuff->length - 1] == 0xFF)) { |
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frame_ready = true; |
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cam->workbuff->data[cam->workbuff->length - 1] = 0; |
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cam->workbuff->length -= 1; |
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} else if ((cam->workbuff->length >= 2) && |
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(cam->workbuff->data[cam->workbuff->length - 2] == 0xFF) && |
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(cam->workbuff->data[cam->workbuff->length - 1] == 0xD9)) { |
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frame_ready = true; |
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} |
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if (frame_ready) { |
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DBG("Workbuff image size = %d\n",cam->workbuff->length); |
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process_frame(cam); |
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frame_ready = false; |
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if (waitqueue_active(&cam->wq_stream)) |
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wake_up_interruptible(&cam->wq_stream); |
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} |
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} |
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if(cam->streaming) { |
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/* resubmit */ |
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urb->dev = cam->dev; |
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if ((i = usb_submit_urb(urb, GFP_ATOMIC)) != 0) |
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ERR("%s: usb_submit_urb ret %d!\n", __func__, i); |
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} |
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} |
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/****************************************************************************** |
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* |
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* configure_transfer_mode |
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* |
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*****************************************************************************/ |
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static int configure_transfer_mode(struct camera_data *cam, unsigned int alt) |
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{ |
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static unsigned char iso_regs[8][4] = { |
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{0x00, 0x00, 0x00, 0x00}, |
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{0x00, 0x00, 0x00, 0x00}, |
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{0xB9, 0x00, 0x00, 0x7E}, |
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{0xB9, 0x00, 0x01, 0x7E}, |
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{0xB9, 0x00, 0x02, 0x7E}, |
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{0xB9, 0x00, 0x02, 0xFE}, |
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{0xB9, 0x00, 0x03, 0x7E}, |
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{0xB9, 0x00, 0x03, 0xFD} |
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}; |
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struct cpia2_command cmd; |
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unsigned char reg; |
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|
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if (!video_is_registered(&cam->vdev)) |
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return -ENODEV; |
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/*** |
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* Write the isoc registers according to the alternate selected |
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***/ |
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cmd.direction = TRANSFER_WRITE; |
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cmd.buffer.block_data[0] = iso_regs[alt][0]; |
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cmd.buffer.block_data[1] = iso_regs[alt][1]; |
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cmd.buffer.block_data[2] = iso_regs[alt][2]; |
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cmd.buffer.block_data[3] = iso_regs[alt][3]; |
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cmd.req_mode = CAMERAACCESS_TYPE_BLOCK | CAMERAACCESS_VC; |
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cmd.start = CPIA2_VC_USB_ISOLIM; |
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cmd.reg_count = 4; |
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cpia2_send_command(cam, &cmd); |
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|
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/*** |
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* Enable relevant streams before starting polling. |
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* First read USB Stream Config Register. |
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***/ |
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cmd.direction = TRANSFER_READ; |
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cmd.req_mode = CAMERAACCESS_TYPE_BLOCK | CAMERAACCESS_VC; |
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cmd.start = CPIA2_VC_USB_STRM; |
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cmd.reg_count = 1; |
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cpia2_send_command(cam, &cmd); |
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reg = cmd.buffer.block_data[0]; |
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/* Clear iso, bulk, and int */ |
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reg &= ~(CPIA2_VC_USB_STRM_BLK_ENABLE | |
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CPIA2_VC_USB_STRM_ISO_ENABLE | |
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CPIA2_VC_USB_STRM_INT_ENABLE); |
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|
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if (alt == USBIF_BULK) { |
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DBG("Enabling bulk xfer\n"); |
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reg |= CPIA2_VC_USB_STRM_BLK_ENABLE; /* Enable Bulk */ |
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cam->xfer_mode = XFER_BULK; |
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} else if (alt >= USBIF_ISO_1) { |
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DBG("Enabling ISOC xfer\n"); |
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reg |= CPIA2_VC_USB_STRM_ISO_ENABLE; |
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cam->xfer_mode = XFER_ISOC; |
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} |
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cmd.buffer.block_data[0] = reg; |
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cmd.direction = TRANSFER_WRITE; |
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cmd.start = CPIA2_VC_USB_STRM; |
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cmd.reg_count = 1; |
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cmd.req_mode = CAMERAACCESS_TYPE_BLOCK | CAMERAACCESS_VC; |
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cpia2_send_command(cam, &cmd); |
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|
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return 0; |
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} |
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|
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/****************************************************************************** |
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* |
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* cpia2_usb_change_streaming_alternate |
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* |
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*****************************************************************************/ |
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int cpia2_usb_change_streaming_alternate(struct camera_data *cam, |
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unsigned int alt) |
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{ |
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int ret = 0; |
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|
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if(alt < USBIF_ISO_1 || alt > USBIF_ISO_6) |
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return -EINVAL; |
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|
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if(alt == cam->params.camera_state.stream_mode) |
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return 0; |
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|
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cpia2_usb_stream_pause(cam); |
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|
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configure_transfer_mode(cam, alt); |
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|
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cam->params.camera_state.stream_mode = alt; |
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|
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/* Reset the camera to prevent image quality degradation */ |
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cpia2_reset_camera(cam); |
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|
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cpia2_usb_stream_resume(cam); |
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|
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return ret; |
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} |
|
|
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/****************************************************************************** |
|
* |
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* set_alternate |
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* |
|
*****************************************************************************/ |
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static int set_alternate(struct camera_data *cam, unsigned int alt) |
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{ |
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int ret = 0; |
|
|
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if(alt == cam->cur_alt) |
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return 0; |
|
|
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if (cam->cur_alt != USBIF_CMDONLY) { |
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DBG("Changing from alt %d to %d\n", cam->cur_alt, USBIF_CMDONLY); |
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ret = usb_set_interface(cam->dev, cam->iface, USBIF_CMDONLY); |
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if (ret != 0) |
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return ret; |
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} |
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if (alt != USBIF_CMDONLY) { |
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DBG("Changing from alt %d to %d\n", USBIF_CMDONLY, alt); |
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ret = usb_set_interface(cam->dev, cam->iface, alt); |
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if (ret != 0) |
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return ret; |
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} |
|
|
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cam->old_alt = cam->cur_alt; |
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cam->cur_alt = alt; |
|
|
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return ret; |
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} |
|
|
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/****************************************************************************** |
|
* |
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* free_sbufs |
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* |
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* Free all cam->sbuf[]. All non-NULL .data and .urb members that are non-NULL |
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* are assumed to be allocated. Non-NULL .urb members are also assumed to be |
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* submitted (and must therefore be killed before they are freed). |
|
*****************************************************************************/ |
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static void free_sbufs(struct camera_data *cam) |
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{ |
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int i; |
|
|
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for (i = 0; i < NUM_SBUF; i++) { |
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if(cam->sbuf[i].urb) { |
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usb_kill_urb(cam->sbuf[i].urb); |
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usb_free_urb(cam->sbuf[i].urb); |
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cam->sbuf[i].urb = NULL; |
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} |
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if(cam->sbuf[i].data) { |
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kfree(cam->sbuf[i].data); |
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cam->sbuf[i].data = NULL; |
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} |
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} |
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} |
|
|
|
/******* |
|
* Convenience functions |
|
*******/ |
|
/**************************************************************************** |
|
* |
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* write_packet |
|
* |
|
***************************************************************************/ |
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static int write_packet(struct usb_device *udev, |
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u8 request, u8 * registers, u16 start, size_t size) |
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{ |
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unsigned char *buf; |
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int ret; |
|
|
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if (!registers || size <= 0) |
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return -EINVAL; |
|
|
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buf = kmemdup(registers, size, GFP_KERNEL); |
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if (!buf) |
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return -ENOMEM; |
|
|
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ret = usb_control_msg(udev, |
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usb_sndctrlpipe(udev, 0), |
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request, |
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USB_TYPE_VENDOR | USB_RECIP_DEVICE, |
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start, /* value */ |
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0, /* index */ |
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buf, /* buffer */ |
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size, |
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HZ); |
|
|
|
kfree(buf); |
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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; |
|
|
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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_array(FRAME_SIZE_PER_DESC, FRAMES_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); |
|
for (j = 0; j < NUM_SBUF; j++) { |
|
kfree(cam->sbuf[j].data); |
|
cam->sbuf[j].data = NULL; |
|
} |
|
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); |
|
|
|
if(cam->buffers) { |
|
DBG("Wakeup waiting processes\n"); |
|
cam->curbuff->status = FRAME_READY; |
|
cam->curbuff->length = 0; |
|
wake_up_interruptible(&cam->wq_stream); |
|
} |
|
|
|
v4l2_device_put(&cam->v4l2_dev); |
|
|
|
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); |
|
}
|
|
|