patch-2.4.0-test7 linux/drivers/char/cpia_usb.c

• Lines: 627
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.4.0-test6/linux/drivers/char/cpia_usb.c
• Orig date: Tue Apr 11 15:09:16 2000

diff -u --recursive --new-file v2.4.0-test6/linux/drivers/char/cpia_usb.c linux/drivers/char/cpia_usb.c
@@ -1,626 +0,0 @@
-/*
- * cpia_usb CPiA USB driver
- *
- * Supports CPiA based parallel port Video Camera's.
- *
- * Copyright (C) 1999        Jochen Scharrlach <Jochen.Scharrlach@schwaben.de>
- * Copyright (C) 1999, 2000  Johannes Erdfelt <jerdfelt@valinux.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/wait.h>
-#include <linux/sched.h>
-#include <linux/list.h>
-#include <linux/slab.h>
-#include <linux/vmalloc.h>
-#include <linux/usb.h>
-
-#include "cpia.h"
-
-#define USB_REQ_CPIA_GRAB_FRAME			0xC1
-#define USB_REQ_CPIA_UPLOAD_FRAME		0xC2
-#define  WAIT_FOR_NEXT_FRAME			0
-#define  FORCE_FRAME_UPLOAD			1
-
-#define FRAMES_PER_DESC		10
-#define FRAME_SIZE_PER_DESC	960	/* Shouldn't be hardcoded */
-#define CPIA_NUMSBUF		2
-#define STREAM_BUF_SIZE		(PAGE_SIZE * 4)
-#define SCRATCH_BUF_SIZE	(STREAM_BUF_SIZE * 2)
-
-struct cpia_sbuf {
-	char *data;
-	urb_t *urb;
-};
-
-#define FRAMEBUF_LEN (CPIA_MAX_FRAME_SIZE+100)
-enum framebuf_status {
-	FRAME_EMPTY,
-	FRAME_READING,
-	FRAME_READY,
-	FRAME_ERROR,
-};
-
-struct framebuf {
-	int length;
-	enum framebuf_status status;
-	u8 data[FRAMEBUF_LEN];
-	struct framebuf *next;
-};
-
-struct usb_cpia {
-	/* Device structure */
-	struct usb_device *dev;
-
-	unsigned char iface;
-	wait_queue_head_t wq_stream;
-
-	int cursbuf;		/* Current receiving sbuf */
-	struct cpia_sbuf sbuf[CPIA_NUMSBUF];		/* Double buffering */
-
-	int streaming;
-	int open;
-	int present;
-	struct framebuf *buffers[3];
-	struct framebuf *curbuff, *workbuff;
-};
-
-static int cpia_usb_open(void *privdata);
-static int cpia_usb_registerCallback(void *privdata, void (*cb) (void *cbdata),
-			             void *cbdata);
-static int cpia_usb_transferCmd(void *privdata, u8 *command, u8 *data);
-static int cpia_usb_streamStart(void *privdata);
-static int cpia_usb_streamStop(void *privdata);
-static int cpia_usb_streamRead(void *privdata, u8 *frame, int noblock);
-static int cpia_usb_close(void *privdata);
-
-#define ABOUT "USB driver for Vision CPiA based cameras"
-
-static struct cpia_camera_ops cpia_usb_ops = {
-	cpia_usb_open,
-	cpia_usb_registerCallback,
-	cpia_usb_transferCmd,
-	cpia_usb_streamStart,
-	cpia_usb_streamStop,
-	cpia_usb_streamRead,
-	cpia_usb_close,
-	0
-};
-
-static struct cam_data *cam_list;
-
-static void cpia_usb_complete(struct urb *urb)
-{
-	int i;
-	char *cdata;
-	struct usb_cpia *ucpia;
-
-	if (!urb || !urb->context)
-		return;
-
-	ucpia = (struct usb_cpia *) urb->context;
-
-	if (!ucpia->dev || !ucpia->streaming || !ucpia->present || !ucpia->open)
-		return;
-
-	if (ucpia->workbuff->status == FRAME_EMPTY) {
-		ucpia->workbuff->status = FRAME_READING;
-		ucpia->workbuff->length = 0;
-	}
- 		  
-	for (i = 0; i < urb->number_of_packets; i++) {
-		int n = urb->iso_frame_desc[i].actual_length;
-		int st = urb->iso_frame_desc[i].status;
-
-		cdata = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
-
-		if (st)
-			printk(KERN_DEBUG "cpia data error: [%d] len=%d, status=%X\n", i, n, st);
-
-		if (FRAMEBUF_LEN < ucpia->workbuff->length + n) {
-			printk(KERN_DEBUG "cpia: scratch buf overflow!scr_len: %d, n: %d\n", ucpia->workbuff->length, n);
-			return;
-		}
-	    
-		if (n) {
-			if ((ucpia->workbuff->length > 0) || 
-			    (0x19 == cdata[0] && 0x68 == cdata[1])) {
-				memcpy(ucpia->workbuff->data + ucpia->workbuff->length, cdata, n);
-				ucpia->workbuff->length += n;
-			} else
-				DBG("Ignoring packet!\n");
-		} else {
-			if (ucpia->workbuff->length > 4 &&
-			    0xff == ucpia->workbuff->data[ucpia->workbuff->length-1] &&
-			    0xff == ucpia->workbuff->data[ucpia->workbuff->length-2] &&
-			    0xff == ucpia->workbuff->data[ucpia->workbuff->length-3] &&
-			    0xff == ucpia->workbuff->data[ucpia->workbuff->length-4]) {
-				ucpia->workbuff->status = FRAME_READY;
-				ucpia->curbuff = ucpia->workbuff;
-				ucpia->workbuff = ucpia->workbuff->next;
-				ucpia->workbuff->status = FRAME_EMPTY;
-				ucpia->workbuff->length = 0;
-		  
-				if (waitqueue_active(&ucpia->wq_stream))
-					wake_up_interruptible(&ucpia->wq_stream);
-			}
-		}
-	}
-}
-
-static int cpia_usb_open(void *privdata)
-{
-	struct usb_cpia *ucpia = (struct usb_cpia *) privdata;
-	urb_t *urb;
-	int ret, retval = 0, fx, err;
-  
-	if (!ucpia)
-		return -EINVAL;
-
-	ucpia->sbuf[0].data = kmalloc(FRAMES_PER_DESC * FRAME_SIZE_PER_DESC, GFP_KERNEL);
-	if (!ucpia->sbuf[0].data)
-		return -EINVAL;
-
-	ucpia->sbuf[1].data = kmalloc(FRAMES_PER_DESC * FRAME_SIZE_PER_DESC, GFP_KERNEL);
-	if (!ucpia->sbuf[1].data) {
-		retval = -EINVAL;
-		goto error_0;
-	}
-	
-	ret = usb_set_interface(ucpia->dev, ucpia->iface, 3);
-	if (ret < 0) {
-		printk(KERN_ERR "cpia_usb_open: usb_set_interface error (ret = %d)\n", ret);
-		retval = -EBUSY;
-		goto error_all;
-	}
-
-	ucpia->buffers[0]->status = FRAME_EMPTY;
-	ucpia->buffers[0]->length = 0;
-	ucpia->buffers[1]->status = FRAME_EMPTY;
-	ucpia->buffers[1]->length = 0;
-	ucpia->buffers[2]->status = FRAME_EMPTY;
-	ucpia->buffers[2]->length = 0;
-	ucpia->curbuff = ucpia->buffers[0];
-	ucpia->workbuff = ucpia->buffers[1];
-
-	/* We double buffer the Iso lists */
-	urb = usb_alloc_urb(FRAMES_PER_DESC);
-	if (!urb) {
-		printk(KERN_ERR "cpia_init_isoc: usb_alloc_urb 0\n");
-		retval = -ENOMEM;
-		goto error_all;
-	}
-
-	ucpia->sbuf[0].urb = urb;
-	urb->dev = ucpia->dev;
-	urb->context = ucpia;
-	urb->pipe = usb_rcvisocpipe(ucpia->dev, 1);
-	urb->transfer_flags = USB_ISO_ASAP;
-	urb->transfer_buffer = ucpia->sbuf[0].data;
-	urb->complete = cpia_usb_complete;
-	urb->number_of_packets = FRAMES_PER_DESC;
-	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;
-	}
-
-	urb = usb_alloc_urb(FRAMES_PER_DESC);
-	if (!urb) {
-		printk(KERN_ERR "cpia_init_isoc: usb_alloc_urb 0\n");
-		retval = -ENOMEM;
-		goto error_all;
-	}
-
-	ucpia->sbuf[1].urb = urb;
-	urb->dev = ucpia->dev;
-	urb->context = ucpia;
-	urb->pipe = usb_rcvisocpipe(ucpia->dev, 1);
-	urb->transfer_flags = USB_ISO_ASAP;
-	urb->transfer_buffer = ucpia->sbuf[1].data;
-	urb->complete = cpia_usb_complete;
-	urb->number_of_packets = FRAMES_PER_DESC;
-	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;
-	}
-
-	ucpia->sbuf[1].urb->next = ucpia->sbuf[0].urb;
-	ucpia->sbuf[0].urb->next = ucpia->sbuf[1].urb;
-	
-	err = usb_submit_urb(ucpia->sbuf[0].urb);
-	if (err)
-		printk(KERN_ERR "cpia_init_isoc: usb_submit_urb 0 ret %d\n",
-			err);
-	err = usb_submit_urb(ucpia->sbuf[1].urb);
-	if (err)
-		printk(KERN_ERR "cpia_init_isoc: usb_submit_urb 1 ret %d\n",
-			err);
-
-	ucpia->streaming = 1;
-	ucpia->open = 1;
-
-	return 0;
-
-error_all:
-	kfree (ucpia->sbuf[1].data);
-error_0:
-	kfree (ucpia->sbuf[0].data);
-	
-	return retval;
-}
-
-//
-// convenience functions
-//
-
-/****************************************************************************
- *
- *  WritePacket
- *
- ***************************************************************************/
-static int WritePacket(struct usb_device *udev, const u8 *packet, u8 *buf, size_t size)
-{
-	if (!packet)
-		return -EINVAL;
-
-	return usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
-			 packet[1] + (packet[0] << 8),
-			 USB_TYPE_VENDOR | USB_RECIP_DEVICE,
-			 packet[2] + (packet[3] << 8), 
-			 packet[4] + (packet[5] << 8), buf, size, HZ);
-}
-
-/****************************************************************************
- *
- *  ReadPacket
- *
- ***************************************************************************/
-static int ReadPacket(struct usb_device *udev, u8 *packet, u8 *buf, size_t size)
-{
-	if (!packet || size <= 0)
-		return -EINVAL;
-
-	return usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
-			 packet[1] + (packet[0] << 8),
-			 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
-			 packet[2] + (packet[3] << 8), 
-			 packet[4] + (packet[5] << 8), buf, size, HZ);
-}
-
-static int cpia_usb_transferCmd(void *privdata, u8 *command, u8 *data)
-{
-	int err = 0;
-	int databytes;
-	struct usb_cpia *ucpia = (struct usb_cpia *)privdata;
-	struct usb_device *udev = ucpia->dev;
-
-	if (!udev) {
-		DBG("Internal driver error: udev is NULL\n");
-		return -EINVAL;
-	}
-
-	if (!command) {
-		DBG("Internal driver error: command is NULL\n");
-		return -EINVAL;
-	}
-
-	databytes = (((int)command[7])<<8) | command[6];
-
-	if (command[0] == DATA_IN) {
-		u8 buffer[8];
-
-		if (!data) {
-			DBG("Internal driver error: data is NULL\n");
-			return -EINVAL;
-		}
-
-		err = ReadPacket(udev, command, buffer, 8);
-		if (err < 0)
-			return err;
-
-		memcpy(data, buffer, databytes);
-	} else if(command[0] == DATA_OUT)
-		WritePacket(udev, command, data, databytes);
-	else {
-		DBG("Unexpected first byte of command: %x\n", command[0]);
-		err = -EINVAL;
-	}
-
-	return 0;
-}
-
-static int cpia_usb_registerCallback(void *privdata, void (*cb) (void *cbdata),
-	void *cbdata)
-{
-	return -ENODEV;
-}
-
-static int cpia_usb_streamStart(void *privdata)
-{
-	return -ENODEV;
-}
-
-static int cpia_usb_streamStop(void *privdata)
-{
-	return -ENODEV;
-}
-
-static int cpia_usb_streamRead(void *privdata, u8 *frame, int noblock)
-{
-	struct usb_cpia *ucpia = (struct usb_cpia *) privdata;
-	struct framebuf *mybuff;
-
-	if (!ucpia || !ucpia->present)
-		return -1;
-  
-	if (ucpia->curbuff->status != FRAME_READY)
-		interruptible_sleep_on(&ucpia->wq_stream);
-	else
-		DBG("Frame already waiting!\n");
-
-	mybuff = ucpia->curbuff;
-
-	if (!mybuff)
-		return -1;
-  
-	if (mybuff->status != FRAME_READY || mybuff->length < 4) {
-		DBG("Something went wrong!\n");
-		return -1;
-	}
-
-	memcpy(frame, mybuff->data, mybuff->length);
-	mybuff->status = FRAME_EMPTY;
-  
-/*   DBG("read done, %d bytes, Header: %x/%x, Footer: %x%x%x%x\n",  */
-/*       mybuff->length, frame[0], frame[1], */
-/*       frame[mybuff->length-4], frame[mybuff->length-3],  */
-/*       frame[mybuff->length-2], frame[mybuff->length-1]); */
-
-	return mybuff->length;
-}
-
-static void cpia_usb_free_resources(struct usb_cpia *ucpia, int try)
-{
-	if (!ucpia->streaming)
-		return;
-
-	ucpia->streaming = 0;
-
-	/* Set packet size to 0 */
-	if (try) {
-		int ret;
-
-		ret = usb_set_interface(ucpia->dev, ucpia->iface, 0);
-		if (ret < 0) {
-			printk(KERN_ERR "usb_set_interface error (ret = %d)\n", ret);
-			return;
-		}
-	}
-
-	/* Unschedule all of the iso td's */
-	if (ucpia->sbuf[1].urb) {
-		usb_unlink_urb(ucpia->sbuf[1].urb);
-		usb_free_urb(ucpia->sbuf[1].urb);
-		ucpia->sbuf[1].urb = NULL;
-	}
-
-	if (ucpia->sbuf[0].urb) {
-		usb_unlink_urb(ucpia->sbuf[0].urb);
-		usb_free_urb(ucpia->sbuf[0].urb);
-		ucpia->sbuf[0].urb = NULL;
-	}
-}
-
-static int cpia_usb_close(void *privdata)
-{
-	struct usb_cpia *ucpia = (struct usb_cpia *) privdata;
-
-	ucpia->open = 0;
-
-	cpia_usb_free_resources(ucpia, 1);
-
-	if (!ucpia->present)
-		kfree(ucpia);
-
-	return 0;
-}
-
-int cpia_usb_init(void)
-{
-	/* return -ENODEV; */
-	return 0;
-}
-
-/* Probing and initializing */
-
-static void *cpia_probe(struct usb_device *udev, unsigned int ifnum)
-{
-	struct usb_interface_descriptor *interface;
-	struct usb_cpia *ucpia;
-	struct cam_data *cam;
-	int ret;
-  
-	/* A multi-config CPiA camera? */
-	if (udev->descriptor.bNumConfigurations != 1)
-		return NULL;
-
-	interface = &udev->actconfig->interface[ifnum].altsetting[0];
-
-	/* Is it a CPiA? */
-	if (udev->descriptor.idVendor != 0x0553)
-		return NULL;
-	if (udev->descriptor.idProduct != 0x0002)
-		return NULL;
-
-	/* We found a CPiA */
-	printk(KERN_INFO "USB CPiA camera found\n");
-
-	ucpia = kmalloc(sizeof(*ucpia), GFP_KERNEL);
-	if (!ucpia) {
-		printk(KERN_ERR "couldn't kmalloc cpia struct\n");
-		return NULL;
-	}
-
-	memset(ucpia, 0, sizeof(*ucpia));
-
-	ucpia->dev = udev;
-	ucpia->iface = interface->bInterfaceNumber;
-	init_waitqueue_head(&ucpia->wq_stream);
-
-	ucpia->buffers[0] = vmalloc(sizeof(*ucpia->buffers[0]));
-	if (!ucpia->buffers[0]) {
-		printk(KERN_ERR "couldn't vmalloc frame buffer 0\n");
-		goto fail_alloc_0;
-	}
-
-	ucpia->buffers[1] = vmalloc(sizeof(*ucpia->buffers[1]));
-	if (!ucpia->buffers[1]) {
-		printk(KERN_ERR "couldn't vmalloc frame buffer 1\n");
-		goto fail_alloc_1;
-	}
-
-	ucpia->buffers[2] = vmalloc(sizeof(*ucpia->buffers[2]));
-	if (!ucpia->buffers[2]) {
-		printk(KERN_ERR "couldn't vmalloc frame buffer 2\n");
-		goto fail_alloc_2;
-	}
-
-	ucpia->buffers[0]->next = ucpia->buffers[1];
-	ucpia->buffers[1]->next = ucpia->buffers[2];
-	ucpia->buffers[2]->next = ucpia->buffers[0];
-
-	ret = usb_set_interface(udev, ucpia->iface, 0);
-	if (ret < 0) {
-		printk(KERN_ERR "cpia_probe: usb_set_interface error (ret = %d)\n", ret);
-		/* goto fail_all; */
-	}
-
-	/* Before register_camera, important */
-	ucpia->present = 1;
-  
-	cam = cpia_register_camera(&cpia_usb_ops, ucpia);
-	if (!cam) {
-		LOG("failed to cpia_register_camera\n");
-		goto fail_all;
-	}
-
-	ADD_TO_LIST(cam_list, cam);
-
-	return cam;
-
-fail_all:
-	vfree(ucpia->buffers[2]);
-	ucpia->buffers[2] = NULL;
-fail_alloc_2:
-	vfree(ucpia->buffers[1]);
-	ucpia->buffers[1] = NULL;
-fail_alloc_1:
-	vfree(ucpia->buffers[0]);
-	ucpia->buffers[0] = NULL;
-fail_alloc_0:
-
-	return NULL;
-}
-
-static void cpia_disconnect(struct usb_device *dev, void *ptr);
-
-static struct usb_driver cpia_driver = {
-	"cpia",
-	cpia_probe,
-	cpia_disconnect,
-	{ NULL, NULL }
-};
-
-/* don't use dev, it may be NULL! (see usb_cpia_cleanup) */
-/* _disconnect from usb_cpia_cleanup is not necessary since usb_deregister */
-/* will do it for us as well as passing a udev structure - jerdfelt */
-static void cpia_disconnect(struct usb_device *udev, void *ptr)
-{
-	struct cam_data *cam = (struct cam_data *) ptr;
-	struct usb_cpia *ucpia = (struct usb_cpia *) cam->lowlevel_data;
-  
-	REMOVE_FROM_LIST(cam);
-
-	/* Don't even try to reset the altsetting if we're disconnected */
-	cpia_usb_free_resources(ucpia, 0);
-
-	ucpia->present = 0;
-
-	cpia_unregister_camera(cam);
-
-	ucpia->curbuff->status = FRAME_ERROR;
-
-	if (waitqueue_active(&ucpia->wq_stream))
-		wake_up_interruptible(&ucpia->wq_stream);
-
-	usb_driver_release_interface(&cpia_driver,
-				     &udev->actconfig->interface[0]);
-
-	ucpia->curbuff = ucpia->workbuff = NULL;
-
-	if (ucpia->buffers[2]) {
-		vfree(ucpia->buffers[2]);
-		ucpia->buffers[2] = NULL;
-	}
-
-	if (ucpia->buffers[1]) {
-		vfree(ucpia->buffers[1]);
-		ucpia->buffers[1] = NULL;
-	}
-
-	if (ucpia->buffers[0]) {
-		vfree(ucpia->buffers[0]);
-		ucpia->buffers[0] = NULL;
-	}
-
-	if (!ucpia->open)
-		kfree(ucpia);
-}
-
-int usb_cpia_init(void)
-{
-	cam_list = NULL;
-
-	return usb_register(&cpia_driver);
-}
-
-void usb_cpia_cleanup(void)
-{
-/*
-	struct cam_data *cam;
-
-	while ((cam = cam_list) != NULL)
-		cpia_disconnect(NULL, cam);
-*/
-
-	usb_deregister(&cpia_driver);
-}
-
-#ifdef MODULE
-int init_module(void)
-{
-	return usb_cpia_init();
-}
-
-void cleanup_module(void)
-{
-	usb_cpia_cleanup();
-}
-#endif /* !MODULE */