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path: root/drivers/media/video/cpia_usb.c
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Diffstat (limited to 'drivers/media/video/cpia_usb.c')
-rw-r--r--drivers/media/video/cpia_usb.c662
1 files changed, 662 insertions, 0 deletions
diff --git a/drivers/media/video/cpia_usb.c b/drivers/media/video/cpia_usb.c
new file mode 100644
index 000000000000..cdda423386c5
--- /dev/null
+++ b/drivers/media/video/cpia_usb.c
@@ -0,0 +1,662 @@
+/*
+ * 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 <johannes@erdfelt.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.
+ */
+
+/* define _CPIA_DEBUG_ for verbose debug output (see cpia.h) */
+/* #define _CPIA_DEBUG_ 1 */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/wait.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;
+ struct urb *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,
+ THIS_MODULE
+};
+
+static LIST_HEAD(cam_list);
+static spinlock_t cam_list_lock_usb;
+
+static void cpia_usb_complete(struct urb *urb, struct pt_regs *regs)
+{
+ 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);
+ }
+ }
+ }
+
+ /* resubmit */
+ urb->dev = ucpia->dev;
+ if ((i = usb_submit_urb(urb, GFP_ATOMIC)) != 0)
+ printk(KERN_ERR "%s: usb_submit_urb ret %d\n", __FUNCTION__, i);
+}
+
+static int cpia_usb_open(void *privdata)
+{
+ struct usb_cpia *ucpia = (struct usb_cpia *) privdata;
+ struct urb *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_1;
+ }
+
+ 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, and also know the polling
+ * interval is every frame (1 == (1 << (bInterval -1))).
+ */
+ urb = usb_alloc_urb(FRAMES_PER_DESC, GFP_KERNEL);
+ if (!urb) {
+ printk(KERN_ERR "cpia_init_isoc: usb_alloc_urb 0\n");
+ retval = -ENOMEM;
+ goto error_1;
+ }
+
+ ucpia->sbuf[0].urb = urb;
+ urb->dev = ucpia->dev;
+ urb->context = ucpia;
+ urb->pipe = usb_rcvisocpipe(ucpia->dev, 1);
+ urb->transfer_flags = URB_ISO_ASAP;
+ urb->transfer_buffer = ucpia->sbuf[0].data;
+ urb->complete = cpia_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;
+ }
+
+ urb = usb_alloc_urb(FRAMES_PER_DESC, GFP_KERNEL);
+ if (!urb) {
+ printk(KERN_ERR "cpia_init_isoc: usb_alloc_urb 1\n");
+ retval = -ENOMEM;
+ goto error_urb0;
+ }
+
+ ucpia->sbuf[1].urb = urb;
+ urb->dev = ucpia->dev;
+ urb->context = ucpia;
+ urb->pipe = usb_rcvisocpipe(ucpia->dev, 1);
+ urb->transfer_flags = URB_ISO_ASAP;
+ urb->transfer_buffer = ucpia->sbuf[1].data;
+ urb->complete = cpia_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 */
+ err = usb_submit_urb(ucpia->sbuf[0].urb, GFP_KERNEL);
+ if (err) {
+ printk(KERN_ERR "cpia_init_isoc: usb_submit_urb 0 ret %d\n",
+ err);
+ goto error_urb1;
+ }
+ err = usb_submit_urb(ucpia->sbuf[1].urb, GFP_KERNEL);
+ if (err) {
+ printk(KERN_ERR "cpia_init_isoc: usb_submit_urb 1 ret %d\n",
+ err);
+ goto error_urb1;
+ }
+
+ ucpia->streaming = 1;
+ ucpia->open = 1;
+
+ return 0;
+
+error_urb1: /* free urb 1 */
+ usb_free_urb(ucpia->sbuf[1].urb);
+ ucpia->sbuf[1].urb = NULL;
+error_urb0: /* free urb 0 */
+ usb_free_urb(ucpia->sbuf[0].urb);
+ ucpia->sbuf[0].urb = NULL;
+error_1:
+ kfree (ucpia->sbuf[1].data);
+ ucpia->sbuf[1].data = NULL;
+error_0:
+ kfree (ucpia->sbuf[0].data);
+ ucpia->sbuf[0].data = NULL;
+
+ 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, 1000);
+}
+
+/****************************************************************************
+ *
+ * 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, 1000);
+}
+
+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_kill_urb(ucpia->sbuf[1].urb);
+ usb_free_urb(ucpia->sbuf[1].urb);
+ ucpia->sbuf[1].urb = NULL;
+ }
+
+ if (ucpia->sbuf[1].data) {
+ kfree(ucpia->sbuf[1].data);
+ ucpia->sbuf[1].data = NULL;
+ }
+
+ if (ucpia->sbuf[0].urb) {
+ usb_kill_urb(ucpia->sbuf[0].urb);
+ usb_free_urb(ucpia->sbuf[0].urb);
+ ucpia->sbuf[0].urb = NULL;
+ }
+
+ if (ucpia->sbuf[0].data) {
+ kfree(ucpia->sbuf[0].data);
+ ucpia->sbuf[0].data = NULL;
+ }
+}
+
+static int cpia_usb_close(void *privdata)
+{
+ struct usb_cpia *ucpia = (struct usb_cpia *) privdata;
+
+ if(!ucpia)
+ return -ENODEV;
+
+ ucpia->open = 0;
+
+ /* ucpia->present = 0 protects against trying to reset the
+ * alt setting if camera is physically disconnected while open */
+ cpia_usb_free_resources(ucpia, ucpia->present);
+
+ return 0;
+}
+
+int cpia_usb_init(void)
+{
+ /* return -ENODEV; */
+ return 0;
+}
+
+/* Probing and initializing */
+
+static int cpia_probe(struct usb_interface *intf,
+ const struct usb_device_id *id)
+{
+ struct usb_device *udev = interface_to_usbdev(intf);
+ struct usb_host_interface *interface;
+ struct usb_cpia *ucpia;
+ struct cam_data *cam;
+ int ret;
+
+ /* A multi-config CPiA camera? */
+ if (udev->descriptor.bNumConfigurations != 1)
+ return -ENODEV;
+
+ interface = intf->cur_altsetting;
+
+ 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 -ENOMEM;
+ }
+
+ memset(ucpia, 0, sizeof(*ucpia));
+
+ ucpia->dev = udev;
+ ucpia->iface = interface->desc.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;
+ }
+
+ spin_lock( &cam_list_lock_usb );
+ list_add( &cam->cam_data_list, &cam_list );
+ spin_unlock( &cam_list_lock_usb );
+
+ usb_set_intfdata(intf, cam);
+ return 0;
+
+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:
+ kfree(ucpia);
+ return -EIO;
+}
+
+static void cpia_disconnect(struct usb_interface *intf);
+
+static struct usb_device_id cpia_id_table [] = {
+ { USB_DEVICE(0x0553, 0x0002) },
+ { USB_DEVICE(0x0813, 0x0001) },
+ { } /* Terminating entry */
+};
+
+MODULE_DEVICE_TABLE (usb, cpia_id_table);
+MODULE_LICENSE("GPL");
+
+
+static struct usb_driver cpia_driver = {
+ .owner = THIS_MODULE,
+ .name = "cpia",
+ .probe = cpia_probe,
+ .disconnect = cpia_disconnect,
+ .id_table = cpia_id_table,
+};
+
+static void cpia_disconnect(struct usb_interface *intf)
+{
+ struct cam_data *cam = usb_get_intfdata(intf);
+ struct usb_cpia *ucpia;
+ struct usb_device *udev;
+
+ usb_set_intfdata(intf, NULL);
+ if (!cam)
+ return;
+
+ ucpia = (struct usb_cpia *) cam->lowlevel_data;
+ spin_lock( &cam_list_lock_usb );
+ list_del(&cam->cam_data_list);
+ spin_unlock( &cam_list_lock_usb );
+
+ ucpia->present = 0;
+
+ cpia_unregister_camera(cam);
+ if(ucpia->open)
+ cpia_usb_close(cam->lowlevel_data);
+
+ ucpia->curbuff->status = FRAME_ERROR;
+
+ if (waitqueue_active(&ucpia->wq_stream))
+ wake_up_interruptible(&ucpia->wq_stream);
+
+ udev = interface_to_usbdev(intf);
+
+ 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;
+ }
+
+ cam->lowlevel_data = NULL;
+ kfree(ucpia);
+}
+
+static int __init usb_cpia_init(void)
+{
+ printk(KERN_INFO "%s v%d.%d.%d\n",ABOUT,
+ CPIA_USB_MAJ_VER,CPIA_USB_MIN_VER,CPIA_USB_PATCH_VER);
+
+ spin_lock_init(&cam_list_lock_usb);
+ return usb_register(&cpia_driver);
+}
+
+static void __exit usb_cpia_cleanup(void)
+{
+ usb_deregister(&cpia_driver);
+}
+
+
+module_init (usb_cpia_init);
+module_exit (usb_cpia_cleanup);
+