1 // SPDX-License-Identifier: GPL-2.0-or-later
5  * Copyright (C) 2009 Jean-Francois Moine (http://moinejf.free.fr)
14 MODULE_AUTHOR("Jean-Francois Moine <http://moinejf.free.fr>");
32 /* -- write a register -- */
36 	struct usb_device *dev = gspca_dev->dev;  in reg_w()
39 	if (gspca_dev->usb_err < 0)  in reg_w()
51 		gspca_dev->usb_err = ret;  in reg_w()
59 	gspca_dev->cam.cam_mode = vga_mode;  in sd_config()
60 	gspca_dev->cam.nmodes = ARRAY_SIZE(vga_mode);  in sd_config()
61 	gspca_dev->cam.no_urb_create = 1;  in sd_config()
71 /* -- start the camera -- */
77 	/* create 4 URBs - 2 on endpoint 0x83 and 2 on 0x082 */  in sd_start()
79 #error "Not enough URBs in the gspca table"  in sd_start()
86 			return -ENOMEM;  in sd_start()
87 		gspca_dev->urb[n] = urb;  in sd_start()
88 		urb->transfer_buffer = usb_alloc_coherent(gspca_dev->dev,  in sd_start()
91 						&urb->transfer_dma);  in sd_start()
93 		if (urb->transfer_buffer == NULL) {  in sd_start()
95 			return -ENOMEM;  in sd_start()
97 		urb->dev = gspca_dev->dev;  in sd_start()
98 		urb->context = gspca_dev;  in sd_start()
99 		urb->transfer_buffer_length = SD_PKT_SZ * SD_NPKT;  in sd_start()
100 		urb->pipe = usb_rcvisocpipe(gspca_dev->dev,  in sd_start()
102 		urb->transfer_flags = URB_ISO_ASAP  in sd_start()
104 		urb->interval = 1;  in sd_start()
105 		urb->complete = sd_isoc_irq;  in sd_start()
106 		urb->number_of_packets = SD_NPKT;  in sd_start()
108 			urb->iso_frame_desc[i].length = SD_PKT_SZ;  in sd_start()
109 			urb->iso_frame_desc[i].offset = SD_PKT_SZ * i;  in sd_start()
113 	return gspca_dev->usb_err;  in sd_start()
126 	intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface);  in sd_stopN()
127 	usb_set_interface(gspca_dev->dev, gspca_dev->iface,  in sd_stopN()
128 					intf->num_altsetting - 1);  in sd_stopN()
132 			u8 *data,		/* isoc packet */  in sd_pkt_scan()
141 	struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;  in sd_isoc_irq()
146 	gspca_dbg(gspca_dev, D_PACK, "sd isoc irq\n");  in sd_isoc_irq()
147 	if (!gspca_dev->streaming)  in sd_isoc_irq()
149 	if (urb->status != 0) {  in sd_isoc_irq()
150 		if (urb->status == -ESHUTDOWN)  in sd_isoc_irq()
153 		if (gspca_dev->frozen)  in sd_isoc_irq()
156 		pr_err("urb status: %d\n", urb->status);  in sd_isoc_irq()
161 	if (urb == gspca_dev->urb[0] || urb == gspca_dev->urb[2])  in sd_isoc_irq()
165 	if (urb == gspca_dev->urb[1])  in sd_isoc_irq()
166 		urb0 = gspca_dev->urb[0];  in sd_isoc_irq()
168 		urb0 = gspca_dev->urb[2];  in sd_isoc_irq()
169 	for (i = 0; i < urb->number_of_packets; i++) {  in sd_isoc_irq()
172 		if (urb0->iso_frame_desc[i].actual_length != SD_PKT_SZ  in sd_isoc_irq()
173 		    || urb->iso_frame_desc[i].actual_length != SD_PKT_SZ) {  in sd_isoc_irq()
174 			gspca_err(gspca_dev, "ISOC bad lengths %d / %d\n",  in sd_isoc_irq()
175 				  urb0->iso_frame_desc[i].actual_length,  in sd_isoc_irq()
176 				  urb->iso_frame_desc[i].actual_length);  in sd_isoc_irq()
177 			gspca_dev->last_packet_type = DISCARD_PACKET;  in sd_isoc_irq()
180 		st = urb0->iso_frame_desc[i].status;  in sd_isoc_irq()
182 			st = urb->iso_frame_desc[i].status;  in sd_isoc_irq()
184 			pr_err("ISOC data error: [%d] status=%d\n",  in sd_isoc_irq()
186 			gspca_dev->last_packet_type = DISCARD_PACKET;  in sd_isoc_irq()
191 		 * The images are received in URBs of different endpoints  in sd_isoc_irq()
193 		 * Image pieces in URBs of ep 0x83 are continuated in URBs of  in sd_isoc_irq()
195 		 * The packets in the URBs of endpoint 0x83 start with:  in sd_isoc_irq()
196 		 *	- 80 ba/bb 00 00 = start of image followed by 'ff d8'  in sd_isoc_irq()
197 		 *	- 04 ba/bb oo oo = image piece  in sd_isoc_irq()
200 		 *	- (other -> bad frame)  in sd_isoc_irq()
203 		 * The end of image ('ff d9') may occur in any URB.  in sd_isoc_irq()
206 		data = (u8 *) urb0->transfer_buffer  in sd_isoc_irq()
207 					+ urb0->iso_frame_desc[i].offset;  in sd_isoc_irq()
214 					data + 4, SD_PKT_SZ - 4);  in sd_isoc_irq()
217 					data + 4, SD_PKT_SZ - 4);  in sd_isoc_irq()
219 			gspca_dev->last_packet_type = DISCARD_PACKET;  in sd_isoc_irq()
222 		data = (u8 *) urb->transfer_buffer  in sd_isoc_irq()
223 					+ urb->iso_frame_desc[i].offset;  in sd_isoc_irq()
237 /* sub-driver description */
247 /* -- module initialisation -- */
254 /* -- device connect -- */