From: Márton Németh <nm127@xxxxxxxxxxx>
Add helper functions for interrupt endpoint based input handling.
Signed-off-by: Márton Németh <nm127@xxxxxxxxxxx>
---
Hi,
maybe a new configuration option should be also introduced?
Regards,
Márton Németh
---
diff -r 182b5f8fa160 linux/drivers/media/video/gspca/Makefile
--- a/linux/drivers/media/video/gspca/Makefile Sun Nov 15 10:05:30 2009 +0100
+++ b/linux/drivers/media/video/gspca/Makefile Thu Nov 19 08:42:12 2009 +0100
@@ -1,4 +1,5 @@
obj-$(CONFIG_USB_GSPCA) += gspca_main.o
+obj-$(CONFIG_USB_GSPCA) += gspca_input.o
obj-$(CONFIG_USB_GSPCA_CONEX) += gspca_conex.o
obj-$(CONFIG_USB_GSPCA_ETOMS) += gspca_etoms.o
obj-$(CONFIG_USB_GSPCA_FINEPIX) += gspca_finepix.o
@@ -30,6 +31,7 @@
obj-$(CONFIG_USB_GSPCA_ZC3XX) += gspca_zc3xx.o
gspca_main-objs := gspca.o
+gspca_input-objs := input.o
gspca_conex-objs := conex.o
gspca_etoms-objs := etoms.o
gspca_finepix-objs := finepix.o
diff -r 182b5f8fa160 linux/drivers/media/video/gspca/gspca.c
--- a/linux/drivers/media/video/gspca/gspca.c Sun Nov 15 10:05:30 2009 +0100
+++ b/linux/drivers/media/video/gspca/gspca.c Thu Nov 19 08:42:12 2009 +0100
@@ -40,6 +40,9 @@
#include <media/v4l2-ioctl.h>
#include "gspca.h"
+
+#include <linux/input.h>
+#include "input.h"
/* global values */
#define DEF_NURBS 3 /* default number of URBs */
@@ -499,11 +502,13 @@
i, ep->desc.bEndpointAddress);
gspca_dev->alt = i; /* memorize the current alt setting */
if (gspca_dev->nbalt > 1) {
+ gspca_input_destroy_urb(gspca_dev);
ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, i);
if (ret < 0) {
err("set alt %d err %d", i, ret);
- return NULL;
+ ep = NULL;
}
+ gspca_input_create_urb(gspca_dev);
}
return ep;
}
@@ -707,7 +712,9 @@
if (gspca_dev->sd_desc->stopN)
gspca_dev->sd_desc->stopN(gspca_dev);
destroy_urbs(gspca_dev);
+ gspca_input_destroy_urb(gspca_dev);
gspca_set_alt0(gspca_dev);
+ gspca_input_create_urb(gspca_dev);
}
/* always call stop0 to free the subdriver's resources */
@@ -2088,6 +2095,11 @@
usb_set_intfdata(intf, gspca_dev);
PDEBUG(D_PROBE, "/dev/video%d created", gspca_dev->vdev.num);
+
+ ret = gspca_input_connect(gspca_dev, id);
+ if (0 <= ret)
+ ret = gspca_input_create_urb(gspca_dev);
+
return 0;
out:
kfree(gspca_dev->usb_buf);
@@ -2105,6 +2117,7 @@
void gspca_disconnect(struct usb_interface *intf)
{
struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
+ struct input_dev *input_dev;
PDEBUG(D_PROBE, "/dev/video%d disconnect", gspca_dev->vdev.num);
mutex_lock(&gspca_dev->usb_lock);
@@ -2113,6 +2126,13 @@
if (gspca_dev->streaming) {
destroy_urbs(gspca_dev);
wake_up_interruptible(&gspca_dev->wq);
+ }
+
+ gspca_input_destroy_urb(gspca_dev);
+ input_dev = gspca_dev->input_dev;
+ if (input_dev) {
+ gspca_dev->input_dev = NULL;
+ input_unregister_device(input_dev);
}
/* the device is freed at exit of this function */
@@ -2140,6 +2160,7 @@
if (gspca_dev->sd_desc->stopN)
gspca_dev->sd_desc->stopN(gspca_dev);
destroy_urbs(gspca_dev);
+ gspca_input_destroy_urb(gspca_dev);
gspca_set_alt0(gspca_dev);
if (gspca_dev->sd_desc->stop0)
gspca_dev->sd_desc->stop0(gspca_dev);
@@ -2153,6 +2174,7 @@
gspca_dev->frozen = 0;
gspca_dev->sd_desc->init(gspca_dev);
+ gspca_input_create_urb(gspca_dev);
if (gspca_dev->streaming)
return gspca_init_transfer(gspca_dev);
return 0;
diff -r 182b5f8fa160 linux/drivers/media/video/gspca/gspca.h
--- a/linux/drivers/media/video/gspca/gspca.h Sun Nov 15 10:05:30 2009 +0100
+++ b/linux/drivers/media/video/gspca/gspca.h Thu Nov 19 08:42:12 2009 +0100
@@ -81,6 +81,9 @@
typedef void (*cam_pkt_op) (struct gspca_dev *gspca_dev,
u8 *data,
int len);
+typedef int (*cam_int_pkt_op) (struct gspca_dev *gspca_dev,
+ u8 *data,
+ int len);
struct ctrl {
struct v4l2_queryctrl qctrl;
@@ -116,6 +119,7 @@
cam_reg_op get_register;
#endif
cam_ident_op get_chip_ident;
+ cam_int_pkt_op int_pkt_scan;
};
/* packet types when moving from iso buf to frame buf */
@@ -138,6 +142,7 @@
struct module *module; /* subdriver handling the device */
struct usb_device *dev;
struct file *capt_file; /* file doing video capture */
+ struct input_dev *input_dev;
struct cam cam; /* device information */
const struct sd_desc *sd_desc; /* subdriver description */
@@ -147,6 +152,7 @@
#define USB_BUF_SZ 64
__u8 *usb_buf; /* buffer for USB exchanges */
struct urb *urb[MAX_NURBS];
+ struct urb *int_urb;
__u8 *frbuf; /* buffer for nframes */
struct gspca_frame frame[GSPCA_MAX_FRAMES];
diff -r 182b5f8fa160 linux/drivers/media/video/gspca/input.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/linux/drivers/media/video/gspca/input.c Thu Nov 19 08:42:12 2009 +0100
@@ -0,0 +1,193 @@
+/*
+ * Input handling for gspca USB camera drivers
+ *
+ * Copyright (C) 2009 Márton Németh <nm127@xxxxxxxxxxx>
+ *
+ * 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 MODULE_NAME "gspca_input"
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/input.h>
+
+#include "gspca.h"
+#include "input.h"
+
+MODULE_AUTHOR("Márton Németh <nm127@xxxxxxxxxxx>");
+MODULE_DESCRIPTION("GSPCA USB Camera Input Driver");
+MODULE_LICENSE("GPL");
+
+#define DRIVER_VERSION_NUMBER KERNEL_VERSION(0, 0, 1)
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19)
+static void int_irq(struct urb *urb, struct pt_regs *regs)
+#else
+static void int_irq(struct urb *urb)
+#endif
+{
+ struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
+ int ret;
+ int i;
+
+ printk(KERN_DEBUG "int_irq()\n");
+ printk(KERN_DEBUG "urb->status: %i\n", urb->status);
+ if (urb->status == 0) {
+ printk(KERN_DEBUG "urb->actual_length: %u\n", urb->actual_length);
+ for (i = 0; i < urb->actual_length; i++) {
+ printk(KERN_DEBUG "urb->transfer_buffer[%i]=0x%x\n",
+ i, ((u8*)urb->transfer_buffer)[i]);
+ }
+ if (gspca_dev->sd_desc->int_pkt_scan(gspca_dev,
+ urb->transfer_buffer, urb->actual_length) < 0) {
+ printk(KERN_DEBUG "Unknown packet received\n");
+ }
+
+ ret = usb_submit_urb(urb, GFP_ATOMIC);
+ printk(KERN_DEBUG "resubmit urb: %i\n", ret);
+ }
+
+}
+
+int gspca_input_connect(struct gspca_dev *gspca_dev, const struct usb_device_id *id)
+{
+ struct input_dev *input_dev;
+ int err = 0;
+
+ gspca_dev->input_dev = NULL;
+ if (gspca_dev->sd_desc->int_pkt_scan) {
+ printk(KERN_DEBUG "allocating input device\n");
+ input_dev = input_allocate_device();
+ if (!input_dev)
+ return -ENOMEM;
+
+ input_dev->name = "pac7302";
+ //input_dev->phys = "camera";
+ input_dev->id.bustype = BUS_USB;
+ input_dev->id.vendor = le16_to_cpu(id->idVendor);
+ input_dev->id.product = le16_to_cpu(id->idProduct);
+ input_dev->id.version = le16_to_cpu(id->bcdDevice_hi);
+ //input_dev->id.version = le16_to_cpu(id->bcdDevice_lo);
+
+ input_dev->evbit[0] = BIT_MASK(EV_KEY);
+ input_dev->keybit[BIT_WORD(KEY_CAMERA)] = BIT_MASK(KEY_CAMERA);
+ //input_dev->dev.parent = ;
+
+ printk(KERN_DEBUG "registering input device\n");
+ err = input_register_device(input_dev);
+ if (err) {
+ printk(KERN_DEBUG "input device registration failed\n");
+ input_dev->dev.parent = NULL;
+ input_free_device(input_dev);
+ } else {
+ gspca_dev->input_dev = input_dev;
+ }
+ }
+
+ return err;
+}
+EXPORT_SYMBOL(gspca_input_connect);
+
+int gspca_input_create_urb(struct gspca_dev *gspca_dev)
+{
+ int ret = -EINVAL;
+ struct usb_interface *intf;
+ struct usb_host_interface *intf_desc;
+ struct usb_endpoint_descriptor *ep;
+ int i;
+ struct urb *urb;
+ void* buffer = NULL;
+ unsigned int buffer_len;
+ int interval;
+ struct usb_device *dev;
+
+ if (gspca_dev->sd_desc->int_pkt_scan) {
+ intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface);
+ intf_desc = intf->cur_altsetting;
+ for (i = 0; i < intf_desc->desc.bNumEndpoints; i++) {
+ ep = &intf_desc->endpoint[i].desc;
+ if ((ep->bEndpointAddress & USB_DIR_IN) &&
+ ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
+ == USB_ENDPOINT_XFER_INT)) {
+
+ buffer_len = ep->wMaxPacketSize;
+ interval = ep->bInterval;
+ printk(KERN_DEBUG "found int in endpoint: 0x%x\n", ep->bEndpointAddress);
+ printk(KERN_DEBUG " - buffer_len = %u\n", buffer_len);
+ printk(KERN_DEBUG " - interval = %u\n", interval);
+
+ dev = gspca_dev->dev;
+ gspca_dev->int_urb = NULL;
+
+ buffer = kmalloc(ep->wMaxPacketSize, GFP_KERNEL);
+ if (buffer)
+ urb = usb_alloc_urb(0, GFP_KERNEL);
+ else {
+ printk(KERN_DEBUG "buffer allocation failed\n");
+ kfree(buffer);
+ urb = NULL;
+ }
+ if (buffer && urb) {
+ usb_fill_int_urb(urb, dev,
+ usb_rcvintpipe(dev, ep->bEndpointAddress),
+ buffer, buffer_len,
+ int_irq, (void*)gspca_dev, interval);
+ gspca_dev->int_urb = urb;
+ ret = usb_submit_urb(urb, GFP_KERNEL);
+ printk(KERN_DEBUG "usb_submit_urb() returns %i\n", ret);
+ } else
+ printk(KERN_DEBUG "URB allocation failed\n");
+
+ }
+
+ }
+ }
+ return ret;
+}
+EXPORT_SYMBOL(gspca_input_create_urb);
+
+void gspca_input_destroy_urb(struct gspca_dev *gspca_dev)
+{
+ struct urb *urb;
+
+ urb = gspca_dev->int_urb;
+ if (urb) {
+ gspca_dev->int_urb = NULL;
+ usb_kill_urb(urb);
+ usb_buffer_free(gspca_dev->dev,
+ urb->transfer_buffer_length,
+ urb->transfer_buffer,
+ urb->transfer_dma);
+ usb_free_urb(urb);
+ }
+}
+EXPORT_SYMBOL(gspca_input_destroy_urb);
+
+static int __init gspca_input_init(void)
+{
+ info("v%d.%d.%d registered",
+ (DRIVER_VERSION_NUMBER >> 16) & 0xff,
+ (DRIVER_VERSION_NUMBER >> 8) & 0xff,
+ DRIVER_VERSION_NUMBER & 0xff);
+ return 0;
+}
+static void __exit gspca_input_exit(void)
+{
+ info("deregistered");
+}
+
+module_init(gspca_input_init);
+module_exit(gspca_input_exit);
diff -r 182b5f8fa160 linux/drivers/media/video/gspca/input.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/linux/drivers/media/video/gspca/input.h Thu Nov 19 08:42:12 2009 +0100
@@ -0,0 +1,30 @@
+/*
+ * Input handling for gspca USB camera drivers
+ *
+ * Copyright (C) 2009 Márton Németh <nm127@xxxxxxxxxxx>
+ *
+ * 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.
+ */
+
+#ifndef GSPCA_INPUT_H
+#define GSPCA_INPUT_H
+
+#include "gspca.h"
+
+int gspca_input_connect(struct gspca_dev *gspca_dev, const struct usb_device_id *id);
+int gspca_input_create_urb(struct gspca_dev *gspca_dev);
+void gspca_input_destroy_urb(struct gspca_dev *gspca_dev);
+
+#endif
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