patch-2.2.18 linux/drivers/usb/rio500.c

• Lines: 451
• Date: Fri Sep 15 22:03:35 2000
• Orig file: v2.2.17/drivers/usb/rio500.c
• Orig date: Thu Jan 1 01:00:00 1970

diff -u --new-file --recursive --exclude-from /usr/src/exclude v2.2.17/drivers/usb/rio500.c linux/drivers/usb/rio500.c
@@ -0,0 +1,450 @@
+/* -*- linux-c -*- */
+
+/* 
+ * Driver for USB Rio 500
+ *
+ * Cesar Miquel (miquel@df.uba.ar)
+ * 
+ * based on hp_scanner.c by David E. Nelson (dnelson@jump.net)
+ * 
+ * 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.
+ *
+ * Based upon mouse.c (Brad Keryan) and printer.c (Michael Gee).
+ *
+ * */
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/errno.h>
+#include <linux/miscdevice.h>
+#include <linux/random.h>
+#include <linux/poll.h>
+#include <linux/init.h>
+#include <linux/malloc.h>
+#include <linux/spinlock.h>
+#include <linux/usb.h>
+
+#include "rio500_usb.h"
+
+#define RIO_MINOR   64
+
+/* stall/wait timeout for rio */
+#define NAK_TIMEOUT (HZ)
+
+#define IBUF_SIZE 0x1000
+
+/* Size of the rio buffer */
+#define OBUF_SIZE 0x10000
+
+struct rio_usb_data {
+        struct usb_device *rio_dev;     /* init: probe_rio */
+        unsigned int ifnum;             /* Interface number of the USB device */
+        int isopen;                     /* nz if open */
+        int present;                    /* Device is present on the bus */
+        char *obuf, *ibuf;              /* transfer buffers */
+        char bulk_in_ep, bulk_out_ep;   /* Endpoint assignments */
+        wait_queue_head_t wait_q;       /* for timeouts */
+};
+
+static struct rio_usb_data rio_instance;
+
+static int open_rio(struct inode *inode, struct file *file)
+{
+	struct rio_usb_data *rio = &rio_instance;
+
+	if (rio->isopen || !rio->present) {
+		return -EBUSY;
+	}
+	rio->isopen = 1;
+
+	init_waitqueue_head(&rio->wait_q);
+
+	MOD_INC_USE_COUNT;
+
+	info("Rio opened.");
+
+	return 0;
+}
+
+static int close_rio(struct inode *inode, struct file *file)
+{
+	struct rio_usb_data *rio = &rio_instance;
+
+	rio->isopen = 0;
+
+	MOD_DEC_USE_COUNT;
+
+	info("Rio closed.");
+	return 0;
+}
+
+static int
+ioctl_rio(struct inode *inode, struct file *file, unsigned int cmd,
+	  unsigned long arg)
+{
+	struct RioCommand rio_cmd;
+	struct rio_usb_data *rio = &rio_instance;
+	void *data;
+	unsigned char *buffer;
+	int result, requesttype;
+	int retries;
+
+        /* Sanity check to make sure rio is connected, powered, etc */
+        if ( rio == NULL ||
+             rio->present == 0 ||
+             rio->rio_dev == NULL )
+          return -1;
+
+	switch (cmd) {
+	case RIO_RECV_COMMAND:
+		data = (void *) arg;
+		if (data == NULL)
+			break;
+		if (copy_from_user(&rio_cmd, data, sizeof(struct RioCommand)))
+			return -EFAULT;
+		if (rio_cmd.length > PAGE_SIZE)
+			return -EINVAL;
+		buffer = (unsigned char *) __get_free_page(GFP_KERNEL);
+		if (buffer == NULL)
+			return -ENOMEM;
+		if (copy_from_user(buffer, rio_cmd.buffer, rio_cmd.length))
+			return -EFAULT;
+
+		requesttype = rio_cmd.requesttype | USB_DIR_IN |
+		    USB_TYPE_VENDOR | USB_RECIP_DEVICE;
+		dbg
+		    ("sending command:reqtype=%0x req=%0x value=%0x index=%0x len=%0x",
+		     requesttype, rio_cmd.request, rio_cmd.value,
+		     rio_cmd.index, rio_cmd.length);
+		/* Send rio control message */
+		retries = 3;
+		while (retries) {
+			result = usb_control_msg(rio->rio_dev,
+						 usb_rcvctrlpipe(rio-> rio_dev, 0),
+						 rio_cmd.request,
+						 requesttype,
+						 rio_cmd.value,
+						 rio_cmd.index, buffer,
+						 rio_cmd.length,
+						 rio_cmd.timeout);
+			if (result == -ETIMEDOUT)
+				retries--;
+			else if (result < 0) {
+				err("Error executing ioctrl. code = %d",
+				     le32_to_cpu(result));
+				retries = 0;
+			} else {
+				dbg("Executed ioctl. Result = %d (data=%04x)",
+				     le32_to_cpu(result),
+				     le32_to_cpu(*((long *) buffer)));
+				if (copy_to_user(rio_cmd.buffer, buffer,
+						 rio_cmd.length))
+					return -EFAULT;
+				retries = 0;
+			}
+
+			/* rio_cmd.buffer contains a raw stream of single byte
+			   data which has been returned from rio.  Data is
+			   interpreted at application level.  For data that
+			   will be cast to data types longer than 1 byte, data
+			   will be little_endian and will potentially need to
+			   be swapped at the app level */
+
+		}
+		free_page((unsigned long) buffer);
+		break;
+
+	case RIO_SEND_COMMAND:
+		data = (void *) arg;
+		if (data == NULL)
+			break;
+		if (copy_from_user(&rio_cmd, data, sizeof(struct RioCommand)))
+			return -EFAULT;
+		if (rio_cmd.length > PAGE_SIZE)
+			return -EINVAL;
+		buffer = (unsigned char *) __get_free_page(GFP_KERNEL);
+		if (buffer == NULL)
+			return -ENOMEM;
+		if (copy_from_user(buffer, rio_cmd.buffer, rio_cmd.length))
+			return -EFAULT;
+
+		requesttype = rio_cmd.requesttype | USB_DIR_OUT |
+		    USB_TYPE_VENDOR | USB_RECIP_DEVICE;
+		dbg("sending command: reqtype=%0x req=%0x value=%0x index=%0x len=%0x",
+		     requesttype, rio_cmd.request, rio_cmd.value,
+		     rio_cmd.index, rio_cmd.length);
+		/* Send rio control message */
+		retries = 3;
+		while (retries) {
+			result = usb_control_msg(rio->rio_dev,
+						 usb_sndctrlpipe(rio-> rio_dev, 0),
+						 rio_cmd.request,
+						 requesttype,
+						 rio_cmd.value,
+						 rio_cmd.index, buffer,
+						 rio_cmd.length,
+						 rio_cmd.timeout);
+			if (result == -ETIMEDOUT)
+				retries--;
+			else if (result < 0) {
+				err("Error executing ioctrl. code = %d",
+				     le32_to_cpu(result));
+				retries = 0;
+			} else {
+				dbg("Executed ioctl. Result = %d",
+				       le32_to_cpu(result));
+				retries = 0;
+
+			}
+
+		}
+		free_page((unsigned long) buffer);
+		break;
+
+	default:
+		return -ENOIOCTLCMD;
+		break;
+	}
+
+	return 0;
+}
+
+static ssize_t
+write_rio(struct file *file, const char *buffer,
+	  size_t count, loff_t * ppos)
+{
+	struct rio_usb_data *rio = &rio_instance;
+
+	unsigned long copy_size;
+	unsigned long bytes_written = 0;
+	unsigned int partial;
+
+	int result = 0;
+	int maxretry;
+
+        /* Sanity check to make sure rio is connected, powered, etc */
+        if ( rio == NULL ||
+             rio->present == 0 ||
+             rio->rio_dev == NULL )
+          return -1;
+
+	do {
+		unsigned long thistime;
+		char *obuf = rio->obuf;
+
+		thistime = copy_size =
+		    (count >= OBUF_SIZE) ? OBUF_SIZE : count;
+		if (copy_from_user(rio->obuf, buffer, copy_size))
+			return -EFAULT;
+		maxretry = 5;
+		while (thistime) {
+			if (!rio->rio_dev)
+				return -ENODEV;
+			if (signal_pending(current)) {
+				return bytes_written ? bytes_written : -EINTR;
+			}
+
+			result = usb_bulk_msg(rio->rio_dev,
+					 usb_sndbulkpipe(rio->rio_dev, 2),
+					 obuf, thistime, &partial, 5 * HZ);
+
+			dbg("write stats: result:%d thistime:%lu partial:%u",
+			     result, thistime, partial);
+
+			if (result == USB_ST_TIMEOUT) {	/* NAK - so hold for a while */
+				if (!maxretry--) {
+					return -ETIME;
+				}
+				interruptible_sleep_on_timeout(&rio-> wait_q, NAK_TIMEOUT);
+				continue;
+			} else if (!result & partial) {
+				obuf += partial;
+				thistime -= partial;
+			} else
+				break;
+		};
+		if (result) {
+			err("Write Whoops - %x", result);
+			return -EIO;
+		}
+		bytes_written += copy_size;
+		count -= copy_size;
+		buffer += copy_size;
+	} while (count > 0);
+
+	return bytes_written ? bytes_written : -EIO;
+}
+
+static ssize_t
+read_rio(struct file *file, char *buffer, size_t count, loff_t * ppos)
+{
+	struct rio_usb_data *rio = &rio_instance;
+	ssize_t read_count;
+	unsigned int partial;
+	int this_read;
+	int result;
+	int maxretry = 10;
+	char *ibuf = rio->ibuf;
+
+        /* Sanity check to make sure rio is connected, powered, etc */
+        if ( rio == NULL ||
+             rio->present == 0 ||
+             rio->rio_dev == NULL )
+          return -1;
+
+	read_count = 0;
+
+	while (count > 0) {
+		if (signal_pending(current)) {
+			return read_count ? read_count : -EINTR;
+		}
+		if (!rio->rio_dev)
+			return -ENODEV;
+		this_read = (count >= IBUF_SIZE) ? IBUF_SIZE : count;
+
+		result = usb_bulk_msg(rio->rio_dev,
+				      usb_rcvbulkpipe(rio->rio_dev, 1),
+				      ibuf, this_read, &partial,
+				      (int) (HZ * 8));
+
+		dbg(KERN_DEBUG "read stats: result:%d this_read:%u partial:%u",
+		       result, this_read, partial);
+
+		if (partial) {
+			count = this_read = partial;
+		} else if (result == USB_ST_TIMEOUT || result == 15) {	/* FIXME: 15 ??? */
+			if (!maxretry--) {
+				err("read_rio: maxretry timeout");
+				return -ETIME;
+			}
+			interruptible_sleep_on_timeout(&rio->wait_q,
+						       NAK_TIMEOUT);
+			continue;
+		} else if (result != USB_ST_DATAUNDERRUN) {
+			err("Read Whoops - result:%u partial:%u this_read:%u",
+			     result, partial, this_read);
+			return -EIO;
+		} else {
+			return (0);
+		}
+
+		if (this_read) {
+			if (copy_to_user(buffer, ibuf, this_read))
+				return -EFAULT;
+			count -= this_read;
+			read_count += this_read;
+			buffer += this_read;
+		}
+	}
+	return read_count;
+}
+
+static void *probe_rio(struct usb_device *dev, unsigned int ifnum)
+{
+	struct rio_usb_data *rio = &rio_instance;
+
+	if (dev->descriptor.idVendor != 0x841) {
+		return NULL;
+	}
+
+	if (dev->descriptor.idProduct != 0x1 /* RIO 500 */ ) {
+		warn(KERN_INFO "Rio player model not supported/tested.");
+		return NULL;
+	}
+
+	info("USB Rio found at address %d", dev->devnum);
+
+	rio->present = 1;
+	rio->rio_dev = dev;
+
+	if (!(rio->obuf = (char *) kmalloc(OBUF_SIZE, GFP_KERNEL))) {
+		err("probe_rio: Not enough memory for the output buffer");
+		return NULL;
+	}
+	dbg("probe_rio: obuf address:%p", rio->obuf);
+
+	if (!(rio->ibuf = (char *) kmalloc(IBUF_SIZE, GFP_KERNEL))) {
+		err("probe_rio: Not enough memory for the input buffer");
+		kfree(rio->obuf);
+		return NULL;
+	}
+	dbg("probe_rio: ibuf address:%p", rio->ibuf);
+
+	return rio;
+}
+
+static void disconnect_rio(struct usb_device *dev, void *ptr)
+{
+	struct rio_usb_data *rio = (struct rio_usb_data *) ptr;
+
+	if (rio->isopen) {
+		rio->isopen = 0;
+		/* better let it finish - the release will do whats needed */
+		rio->rio_dev = NULL;
+		return;
+	}
+	kfree(rio->ibuf);
+	kfree(rio->obuf);
+
+	info("USB Rio disconnected.");
+
+	rio->present = 0;
+}
+
+static struct
+file_operations usb_rio_fops = {
+	read:		read_rio,
+	write:		write_rio,
+	ioctl:		ioctl_rio,
+	open:		open_rio,
+	release:	close_rio,
+};
+
+static struct
+usb_driver rio_driver = {
+	"rio500",
+	probe_rio,
+	disconnect_rio,
+	{NULL, NULL},
+	&usb_rio_fops,
+	RIO_MINOR
+};
+
+int usb_rio_init(void)
+{
+	if (usb_register(&rio_driver) < 0)
+		return -1;
+
+	info("USB Rio support registered.");
+	return 0;
+}
+
+
+void usb_rio_cleanup(void)
+{
+	struct rio_usb_data *rio = &rio_instance;
+
+	rio->present = 0;
+	usb_deregister(&rio_driver);
+
+
+}
+
+module_init(usb_rio_init);
+module_exit(usb_rio_cleanup);
+
+MODULE_AUTHOR("Cesar Miquel <miquel@df.uba.ar>");
+MODULE_DESCRIPTION("USB Rio 500 driver");