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-rw-r--r--drivers/usb/rio500.c455
1 files changed, 455 insertions, 0 deletions
diff --git a/drivers/usb/rio500.c b/drivers/usb/rio500.c
new file mode 100644
index 000000000..e25ba03d3
--- /dev/null
+++ b/drivers/usb/rio500.c
@@ -0,0 +1,455 @@
+/* -*- 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 "usb.h"
+
+#include "rio500_usb.h"
+
+#define RIO_MINOR 64
+
+/* stall/wait timeout for rio */
+#define NAK_TIMEOUT (HZ)
+
+#define IBUF_SIZE 128
+
+/* 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;
+ copy_from_user_ret(&rio_cmd, data, sizeof(struct RioCommand),
+ -EFAULT);
+ if (rio_cmd.length > PAGE_SIZE)
+ return -EINVAL;
+ buffer = (unsigned char *) __get_free_page(GFP_KERNEL);
+ if (buffer == NULL)
+ return -ENOMEM;
+ copy_from_user_ret(buffer, rio_cmd.buffer, rio_cmd.length,
+ -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)));
+ copy_to_user_ret(rio_cmd.buffer, buffer,
+ rio_cmd.length, -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;
+ copy_from_user_ret(&rio_cmd, data, sizeof(struct RioCommand),
+ -EFAULT);
+ if (rio_cmd.length > PAGE_SIZE)
+ return -EINVAL;
+ buffer = (unsigned char *) __get_free_page(GFP_KERNEL);
+ if (buffer == NULL)
+ return -ENOMEM;
+ copy_from_user_ret(buffer, rio_cmd.buffer, rio_cmd.length,
+ -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 * .1));
+
+ 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 = {
+ NULL, /* seek */
+ read_rio,
+ write_rio,
+ NULL, /* readdir */
+ NULL, /* poll */
+ ioctl_rio, /* ioctl */
+ NULL, /* mmap */
+ open_rio,
+ NULL, /* flush */
+ close_rio,
+ NULL,
+ NULL, /* fasync */
+};
+
+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);
+
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