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authorAndrzej Pietrasiewicz <andrzej.p@samsung.com>2014-07-15 15:09:44 +0400
committerFelipe Balbi <balbi@ti.com>2014-07-16 21:14:05 +0400
commit8443f2d2b7782fef35fe579bf1eb612c24951486 (patch)
tree904e98cbbe3e0916af116f8f55754d994ce92e79 /drivers/usb/gadget/printer.c
parent8ecef00fe1f33658ee36e902dba6850b51312073 (diff)
downloadlinux-8443f2d2b7782fef35fe579bf1eb612c24951486.tar.xz
usb: gadget: Gadget directory cleanup - group legacy gadgets
The drivers/usb/gadget directory contains many files. Files which are related can be distributed into separate directories. This patch moves the legacy gadgets (i.e. those not using configfs) into a separate directory. Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com> Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers/usb/gadget/printer.c')
-rw-r--r--drivers/usb/gadget/printer.c1305
1 files changed, 0 insertions, 1305 deletions
diff --git a/drivers/usb/gadget/printer.c b/drivers/usb/gadget/printer.c
deleted file mode 100644
index 6474081dcbaf..000000000000
--- a/drivers/usb/gadget/printer.c
+++ /dev/null
@@ -1,1305 +0,0 @@
-/*
- * printer.c -- Printer gadget driver
- *
- * Copyright (C) 2003-2005 David Brownell
- * Copyright (C) 2006 Craig W. Nadler
- *
- * 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.
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/delay.h>
-#include <linux/ioport.h>
-#include <linux/sched.h>
-#include <linux/slab.h>
-#include <linux/mutex.h>
-#include <linux/errno.h>
-#include <linux/init.h>
-#include <linux/timer.h>
-#include <linux/list.h>
-#include <linux/interrupt.h>
-#include <linux/device.h>
-#include <linux/moduleparam.h>
-#include <linux/fs.h>
-#include <linux/poll.h>
-#include <linux/types.h>
-#include <linux/ctype.h>
-#include <linux/cdev.h>
-
-#include <asm/byteorder.h>
-#include <linux/io.h>
-#include <linux/irq.h>
-#include <linux/uaccess.h>
-#include <asm/unaligned.h>
-
-#include <linux/usb/ch9.h>
-#include <linux/usb/composite.h>
-#include <linux/usb/gadget.h>
-#include <linux/usb/g_printer.h>
-
-#include "gadget_chips.h"
-
-USB_GADGET_COMPOSITE_OPTIONS();
-
-#define DRIVER_DESC "Printer Gadget"
-#define DRIVER_VERSION "2007 OCT 06"
-
-static DEFINE_MUTEX(printer_mutex);
-static const char shortname [] = "printer";
-static const char driver_desc [] = DRIVER_DESC;
-
-static dev_t g_printer_devno;
-
-static struct class *usb_gadget_class;
-
-/*-------------------------------------------------------------------------*/
-
-struct printer_dev {
- spinlock_t lock; /* lock this structure */
- /* lock buffer lists during read/write calls */
- struct mutex lock_printer_io;
- struct usb_gadget *gadget;
- s8 interface;
- struct usb_ep *in_ep, *out_ep;
-
- struct list_head rx_reqs; /* List of free RX structs */
- struct list_head rx_reqs_active; /* List of Active RX xfers */
- struct list_head rx_buffers; /* List of completed xfers */
- /* wait until there is data to be read. */
- wait_queue_head_t rx_wait;
- struct list_head tx_reqs; /* List of free TX structs */
- struct list_head tx_reqs_active; /* List of Active TX xfers */
- /* Wait until there are write buffers available to use. */
- wait_queue_head_t tx_wait;
- /* Wait until all write buffers have been sent. */
- wait_queue_head_t tx_flush_wait;
- struct usb_request *current_rx_req;
- size_t current_rx_bytes;
- u8 *current_rx_buf;
- u8 printer_status;
- u8 reset_printer;
- struct cdev printer_cdev;
- struct device *pdev;
- u8 printer_cdev_open;
- wait_queue_head_t wait;
- struct usb_function function;
-};
-
-static struct printer_dev usb_printer_gadget;
-
-/*-------------------------------------------------------------------------*/
-
-/* DO NOT REUSE THESE IDs with a protocol-incompatible driver!! Ever!!
- * Instead: allocate your own, using normal USB-IF procedures.
- */
-
-/* Thanks to NetChip Technologies for donating this product ID.
- */
-#define PRINTER_VENDOR_NUM 0x0525 /* NetChip */
-#define PRINTER_PRODUCT_NUM 0xa4a8 /* Linux-USB Printer Gadget */
-
-/* Some systems will want different product identifiers published in the
- * device descriptor, either numbers or strings or both. These string
- * parameters are in UTF-8 (superset of ASCII's 7 bit characters).
- */
-
-module_param_named(iSerialNum, coverwrite.serial_number, charp, S_IRUGO);
-MODULE_PARM_DESC(iSerialNum, "1");
-
-static char *iPNPstring;
-module_param(iPNPstring, charp, S_IRUGO);
-MODULE_PARM_DESC(iPNPstring, "MFG:linux;MDL:g_printer;CLS:PRINTER;SN:1;");
-
-/* Number of requests to allocate per endpoint, not used for ep0. */
-static unsigned qlen = 10;
-module_param(qlen, uint, S_IRUGO|S_IWUSR);
-
-#define QLEN qlen
-
-/*-------------------------------------------------------------------------*/
-
-/*
- * DESCRIPTORS ... most are static, but strings and (full) configuration
- * descriptors are built on demand.
- */
-
-/* holds our biggest descriptor */
-#define USB_DESC_BUFSIZE 256
-#define USB_BUFSIZE 8192
-
-static struct usb_device_descriptor device_desc = {
- .bLength = sizeof device_desc,
- .bDescriptorType = USB_DT_DEVICE,
- .bcdUSB = cpu_to_le16(0x0200),
- .bDeviceClass = USB_CLASS_PER_INTERFACE,
- .bDeviceSubClass = 0,
- .bDeviceProtocol = 0,
- .idVendor = cpu_to_le16(PRINTER_VENDOR_NUM),
- .idProduct = cpu_to_le16(PRINTER_PRODUCT_NUM),
- .bNumConfigurations = 1
-};
-
-static struct usb_interface_descriptor intf_desc = {
- .bLength = sizeof intf_desc,
- .bDescriptorType = USB_DT_INTERFACE,
- .bNumEndpoints = 2,
- .bInterfaceClass = USB_CLASS_PRINTER,
- .bInterfaceSubClass = 1, /* Printer Sub-Class */
- .bInterfaceProtocol = 2, /* Bi-Directional */
- .iInterface = 0
-};
-
-static struct usb_endpoint_descriptor fs_ep_in_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_XFER_BULK
-};
-
-static struct usb_endpoint_descriptor fs_ep_out_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
- .bEndpointAddress = USB_DIR_OUT,
- .bmAttributes = USB_ENDPOINT_XFER_BULK
-};
-
-static struct usb_descriptor_header *fs_printer_function[] = {
- (struct usb_descriptor_header *) &intf_desc,
- (struct usb_descriptor_header *) &fs_ep_in_desc,
- (struct usb_descriptor_header *) &fs_ep_out_desc,
- NULL
-};
-
-/*
- * usb 2.0 devices need to expose both high speed and full speed
- * descriptors, unless they only run at full speed.
- */
-
-static struct usb_endpoint_descriptor hs_ep_in_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = cpu_to_le16(512)
-};
-
-static struct usb_endpoint_descriptor hs_ep_out_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .wMaxPacketSize = cpu_to_le16(512)
-};
-
-static struct usb_qualifier_descriptor dev_qualifier = {
- .bLength = sizeof dev_qualifier,
- .bDescriptorType = USB_DT_DEVICE_QUALIFIER,
- .bcdUSB = cpu_to_le16(0x0200),
- .bDeviceClass = USB_CLASS_PRINTER,
- .bNumConfigurations = 1
-};
-
-static struct usb_descriptor_header *hs_printer_function[] = {
- (struct usb_descriptor_header *) &intf_desc,
- (struct usb_descriptor_header *) &hs_ep_in_desc,
- (struct usb_descriptor_header *) &hs_ep_out_desc,
- NULL
-};
-
-static struct usb_otg_descriptor otg_descriptor = {
- .bLength = sizeof otg_descriptor,
- .bDescriptorType = USB_DT_OTG,
- .bmAttributes = USB_OTG_SRP,
-};
-
-static const struct usb_descriptor_header *otg_desc[] = {
- (struct usb_descriptor_header *) &otg_descriptor,
- NULL,
-};
-
-/* maxpacket and other transfer characteristics vary by speed. */
-#define ep_desc(g, hs, fs) (((g)->speed == USB_SPEED_HIGH)?(hs):(fs))
-
-/*-------------------------------------------------------------------------*/
-
-/* descriptors that are built on-demand */
-
-static char product_desc [40] = DRIVER_DESC;
-static char serial_num [40] = "1";
-static char pnp_string [1024] =
- "XXMFG:linux;MDL:g_printer;CLS:PRINTER;SN:1;";
-
-/* static strings, in UTF-8 */
-static struct usb_string strings [] = {
- [USB_GADGET_MANUFACTURER_IDX].s = "",
- [USB_GADGET_PRODUCT_IDX].s = product_desc,
- [USB_GADGET_SERIAL_IDX].s = serial_num,
- { } /* end of list */
-};
-
-static struct usb_gadget_strings stringtab_dev = {
- .language = 0x0409, /* en-us */
- .strings = strings,
-};
-
-static struct usb_gadget_strings *dev_strings[] = {
- &stringtab_dev,
- NULL,
-};
-
-/*-------------------------------------------------------------------------*/
-
-static struct usb_request *
-printer_req_alloc(struct usb_ep *ep, unsigned len, gfp_t gfp_flags)
-{
- struct usb_request *req;
-
- req = usb_ep_alloc_request(ep, gfp_flags);
-
- if (req != NULL) {
- req->length = len;
- req->buf = kmalloc(len, gfp_flags);
- if (req->buf == NULL) {
- usb_ep_free_request(ep, req);
- return NULL;
- }
- }
-
- return req;
-}
-
-static void
-printer_req_free(struct usb_ep *ep, struct usb_request *req)
-{
- if (ep != NULL && req != NULL) {
- kfree(req->buf);
- usb_ep_free_request(ep, req);
- }
-}
-
-/*-------------------------------------------------------------------------*/
-
-static void rx_complete(struct usb_ep *ep, struct usb_request *req)
-{
- struct printer_dev *dev = ep->driver_data;
- int status = req->status;
- unsigned long flags;
-
- spin_lock_irqsave(&dev->lock, flags);
-
- list_del_init(&req->list); /* Remode from Active List */
-
- switch (status) {
-
- /* normal completion */
- case 0:
- if (req->actual > 0) {
- list_add_tail(&req->list, &dev->rx_buffers);
- DBG(dev, "G_Printer : rx length %d\n", req->actual);
- } else {
- list_add(&req->list, &dev->rx_reqs);
- }
- break;
-
- /* software-driven interface shutdown */
- case -ECONNRESET: /* unlink */
- case -ESHUTDOWN: /* disconnect etc */
- VDBG(dev, "rx shutdown, code %d\n", status);
- list_add(&req->list, &dev->rx_reqs);
- break;
-
- /* for hardware automagic (such as pxa) */
- case -ECONNABORTED: /* endpoint reset */
- DBG(dev, "rx %s reset\n", ep->name);
- list_add(&req->list, &dev->rx_reqs);
- break;
-
- /* data overrun */
- case -EOVERFLOW:
- /* FALLTHROUGH */
-
- default:
- DBG(dev, "rx status %d\n", status);
- list_add(&req->list, &dev->rx_reqs);
- break;
- }
-
- wake_up_interruptible(&dev->rx_wait);
- spin_unlock_irqrestore(&dev->lock, flags);
-}
-
-static void tx_complete(struct usb_ep *ep, struct usb_request *req)
-{
- struct printer_dev *dev = ep->driver_data;
-
- switch (req->status) {
- default:
- VDBG(dev, "tx err %d\n", req->status);
- /* FALLTHROUGH */
- case -ECONNRESET: /* unlink */
- case -ESHUTDOWN: /* disconnect etc */
- break;
- case 0:
- break;
- }
-
- spin_lock(&dev->lock);
- /* Take the request struct off the active list and put it on the
- * free list.
- */
- list_del_init(&req->list);
- list_add(&req->list, &dev->tx_reqs);
- wake_up_interruptible(&dev->tx_wait);
- if (likely(list_empty(&dev->tx_reqs_active)))
- wake_up_interruptible(&dev->tx_flush_wait);
-
- spin_unlock(&dev->lock);
-}
-
-/*-------------------------------------------------------------------------*/
-
-static int
-printer_open(struct inode *inode, struct file *fd)
-{
- struct printer_dev *dev;
- unsigned long flags;
- int ret = -EBUSY;
-
- mutex_lock(&printer_mutex);
- dev = container_of(inode->i_cdev, struct printer_dev, printer_cdev);
-
- spin_lock_irqsave(&dev->lock, flags);
-
- if (!dev->printer_cdev_open) {
- dev->printer_cdev_open = 1;
- fd->private_data = dev;
- ret = 0;
- /* Change the printer status to show that it's on-line. */
- dev->printer_status |= PRINTER_SELECTED;
- }
-
- spin_unlock_irqrestore(&dev->lock, flags);
-
- DBG(dev, "printer_open returned %x\n", ret);
- mutex_unlock(&printer_mutex);
- return ret;
-}
-
-static int
-printer_close(struct inode *inode, struct file *fd)
-{
- struct printer_dev *dev = fd->private_data;
- unsigned long flags;
-
- spin_lock_irqsave(&dev->lock, flags);
- dev->printer_cdev_open = 0;
- fd->private_data = NULL;
- /* Change printer status to show that the printer is off-line. */
- dev->printer_status &= ~PRINTER_SELECTED;
- spin_unlock_irqrestore(&dev->lock, flags);
-
- DBG(dev, "printer_close\n");
-
- return 0;
-}
-
-/* This function must be called with interrupts turned off. */
-static void
-setup_rx_reqs(struct printer_dev *dev)
-{
- struct usb_request *req;
-
- while (likely(!list_empty(&dev->rx_reqs))) {
- int error;
-
- req = container_of(dev->rx_reqs.next,
- struct usb_request, list);
- list_del_init(&req->list);
-
- /* The USB Host sends us whatever amount of data it wants to
- * so we always set the length field to the full USB_BUFSIZE.
- * If the amount of data is more than the read() caller asked
- * for it will be stored in the request buffer until it is
- * asked for by read().
- */
- req->length = USB_BUFSIZE;
- req->complete = rx_complete;
-
- /* here, we unlock, and only unlock, to avoid deadlock. */
- spin_unlock(&dev->lock);
- error = usb_ep_queue(dev->out_ep, req, GFP_ATOMIC);
- spin_lock(&dev->lock);
- if (error) {
- DBG(dev, "rx submit --> %d\n", error);
- list_add(&req->list, &dev->rx_reqs);
- break;
- }
- /* if the req is empty, then add it into dev->rx_reqs_active. */
- else if (list_empty(&req->list)) {
- list_add(&req->list, &dev->rx_reqs_active);
- }
- }
-}
-
-static ssize_t
-printer_read(struct file *fd, char __user *buf, size_t len, loff_t *ptr)
-{
- struct printer_dev *dev = fd->private_data;
- unsigned long flags;
- size_t size;
- size_t bytes_copied;
- struct usb_request *req;
- /* This is a pointer to the current USB rx request. */
- struct usb_request *current_rx_req;
- /* This is the number of bytes in the current rx buffer. */
- size_t current_rx_bytes;
- /* This is a pointer to the current rx buffer. */
- u8 *current_rx_buf;
-
- if (len == 0)
- return -EINVAL;
-
- DBG(dev, "printer_read trying to read %d bytes\n", (int)len);
-
- mutex_lock(&dev->lock_printer_io);
- spin_lock_irqsave(&dev->lock, flags);
-
- /* We will use this flag later to check if a printer reset happened
- * after we turn interrupts back on.
- */
- dev->reset_printer = 0;
-
- setup_rx_reqs(dev);
-
- bytes_copied = 0;
- current_rx_req = dev->current_rx_req;
- current_rx_bytes = dev->current_rx_bytes;
- current_rx_buf = dev->current_rx_buf;
- dev->current_rx_req = NULL;
- dev->current_rx_bytes = 0;
- dev->current_rx_buf = NULL;
-
- /* Check if there is any data in the read buffers. Please note that
- * current_rx_bytes is the number of bytes in the current rx buffer.
- * If it is zero then check if there are any other rx_buffers that
- * are on the completed list. We are only out of data if all rx
- * buffers are empty.
- */
- if ((current_rx_bytes == 0) &&
- (likely(list_empty(&dev->rx_buffers)))) {
- /* Turn interrupts back on before sleeping. */
- spin_unlock_irqrestore(&dev->lock, flags);
-
- /*
- * If no data is available check if this is a NON-Blocking
- * call or not.
- */
- if (fd->f_flags & (O_NONBLOCK|O_NDELAY)) {
- mutex_unlock(&dev->lock_printer_io);
- return -EAGAIN;
- }
-
- /* Sleep until data is available */
- wait_event_interruptible(dev->rx_wait,
- (likely(!list_empty(&dev->rx_buffers))));
- spin_lock_irqsave(&dev->lock, flags);
- }
-
- /* We have data to return then copy it to the caller's buffer.*/
- while ((current_rx_bytes || likely(!list_empty(&dev->rx_buffers)))
- && len) {
- if (current_rx_bytes == 0) {
- req = container_of(dev->rx_buffers.next,
- struct usb_request, list);
- list_del_init(&req->list);
-
- if (req->actual && req->buf) {
- current_rx_req = req;
- current_rx_bytes = req->actual;
- current_rx_buf = req->buf;
- } else {
- list_add(&req->list, &dev->rx_reqs);
- continue;
- }
- }
-
- /* Don't leave irqs off while doing memory copies */
- spin_unlock_irqrestore(&dev->lock, flags);
-
- if (len > current_rx_bytes)
- size = current_rx_bytes;
- else
- size = len;
-
- size -= copy_to_user(buf, current_rx_buf, size);
- bytes_copied += size;
- len -= size;
- buf += size;
-
- spin_lock_irqsave(&dev->lock, flags);
-
- /* We've disconnected or reset so return. */
- if (dev->reset_printer) {
- list_add(&current_rx_req->list, &dev->rx_reqs);
- spin_unlock_irqrestore(&dev->lock, flags);
- mutex_unlock(&dev->lock_printer_io);
- return -EAGAIN;
- }
-
- /* If we not returning all the data left in this RX request
- * buffer then adjust the amount of data left in the buffer.
- * Othewise if we are done with this RX request buffer then
- * requeue it to get any incoming data from the USB host.
- */
- if (size < current_rx_bytes) {
- current_rx_bytes -= size;
- current_rx_buf += size;
- } else {
- list_add(&current_rx_req->list, &dev->rx_reqs);
- current_rx_bytes = 0;
- current_rx_buf = NULL;
- current_rx_req = NULL;
- }
- }
-
- dev->current_rx_req = current_rx_req;
- dev->current_rx_bytes = current_rx_bytes;
- dev->current_rx_buf = current_rx_buf;
-
- spin_unlock_irqrestore(&dev->lock, flags);
- mutex_unlock(&dev->lock_printer_io);
-
- DBG(dev, "printer_read returned %d bytes\n", (int)bytes_copied);
-
- if (bytes_copied)
- return bytes_copied;
- else
- return -EAGAIN;
-}
-
-static ssize_t
-printer_write(struct file *fd, const char __user *buf, size_t len, loff_t *ptr)
-{
- struct printer_dev *dev = fd->private_data;
- unsigned long flags;
- size_t size; /* Amount of data in a TX request. */
- size_t bytes_copied = 0;
- struct usb_request *req;
-
- DBG(dev, "printer_write trying to send %d bytes\n", (int)len);
-
- if (len == 0)
- return -EINVAL;
-
- mutex_lock(&dev->lock_printer_io);
- spin_lock_irqsave(&dev->lock, flags);
-
- /* Check if a printer reset happens while we have interrupts on */
- dev->reset_printer = 0;
-
- /* Check if there is any available write buffers */
- if (likely(list_empty(&dev->tx_reqs))) {
- /* Turn interrupts back on before sleeping. */
- spin_unlock_irqrestore(&dev->lock, flags);
-
- /*
- * If write buffers are available check if this is
- * a NON-Blocking call or not.
- */
- if (fd->f_flags & (O_NONBLOCK|O_NDELAY)) {
- mutex_unlock(&dev->lock_printer_io);
- return -EAGAIN;
- }
-
- /* Sleep until a write buffer is available */
- wait_event_interruptible(dev->tx_wait,
- (likely(!list_empty(&dev->tx_reqs))));
- spin_lock_irqsave(&dev->lock, flags);
- }
-
- while (likely(!list_empty(&dev->tx_reqs)) && len) {
-
- if (len > USB_BUFSIZE)
- size = USB_BUFSIZE;
- else
- size = len;
-
- req = container_of(dev->tx_reqs.next, struct usb_request,
- list);
- list_del_init(&req->list);
-
- req->complete = tx_complete;
- req->length = size;
-
- /* Check if we need to send a zero length packet. */
- if (len > size)
- /* They will be more TX requests so no yet. */
- req->zero = 0;
- else
- /* If the data amount is not a multple of the
- * maxpacket size then send a zero length packet.
- */
- req->zero = ((len % dev->in_ep->maxpacket) == 0);
-
- /* Don't leave irqs off while doing memory copies */
- spin_unlock_irqrestore(&dev->lock, flags);
-
- if (copy_from_user(req->buf, buf, size)) {
- list_add(&req->list, &dev->tx_reqs);
- mutex_unlock(&dev->lock_printer_io);
- return bytes_copied;
- }
-
- bytes_copied += size;
- len -= size;
- buf += size;
-
- spin_lock_irqsave(&dev->lock, flags);
-
- /* We've disconnected or reset so free the req and buffer */
- if (dev->reset_printer) {
- list_add(&req->list, &dev->tx_reqs);
- spin_unlock_irqrestore(&dev->lock, flags);
- mutex_unlock(&dev->lock_printer_io);
- return -EAGAIN;
- }
-
- if (usb_ep_queue(dev->in_ep, req, GFP_ATOMIC)) {
- list_add(&req->list, &dev->tx_reqs);
- spin_unlock_irqrestore(&dev->lock, flags);
- mutex_unlock(&dev->lock_printer_io);
- return -EAGAIN;
- }
-
- list_add(&req->list, &dev->tx_reqs_active);
-
- }
-
- spin_unlock_irqrestore(&dev->lock, flags);
- mutex_unlock(&dev->lock_printer_io);
-
- DBG(dev, "printer_write sent %d bytes\n", (int)bytes_copied);
-
- if (bytes_copied) {
- return bytes_copied;
- } else {
- return -EAGAIN;
- }
-}
-
-static int
-printer_fsync(struct file *fd, loff_t start, loff_t end, int datasync)
-{
- struct printer_dev *dev = fd->private_data;
- struct inode *inode = file_inode(fd);
- unsigned long flags;
- int tx_list_empty;
-
- mutex_lock(&inode->i_mutex);
- spin_lock_irqsave(&dev->lock, flags);
- tx_list_empty = (likely(list_empty(&dev->tx_reqs)));
- spin_unlock_irqrestore(&dev->lock, flags);
-
- if (!tx_list_empty) {
- /* Sleep until all data has been sent */
- wait_event_interruptible(dev->tx_flush_wait,
- (likely(list_empty(&dev->tx_reqs_active))));
- }
- mutex_unlock(&inode->i_mutex);
-
- return 0;
-}
-
-static unsigned int
-printer_poll(struct file *fd, poll_table *wait)
-{
- struct printer_dev *dev = fd->private_data;
- unsigned long flags;
- int status = 0;
-
- mutex_lock(&dev->lock_printer_io);
- spin_lock_irqsave(&dev->lock, flags);
- setup_rx_reqs(dev);
- spin_unlock_irqrestore(&dev->lock, flags);
- mutex_unlock(&dev->lock_printer_io);
-
- poll_wait(fd, &dev->rx_wait, wait);
- poll_wait(fd, &dev->tx_wait, wait);
-
- spin_lock_irqsave(&dev->lock, flags);
- if (likely(!list_empty(&dev->tx_reqs)))
- status |= POLLOUT | POLLWRNORM;
-
- if (likely(dev->current_rx_bytes) ||
- likely(!list_empty(&dev->rx_buffers)))
- status |= POLLIN | POLLRDNORM;
-
- spin_unlock_irqrestore(&dev->lock, flags);
-
- return status;
-}
-
-static long
-printer_ioctl(struct file *fd, unsigned int code, unsigned long arg)
-{
- struct printer_dev *dev = fd->private_data;
- unsigned long flags;
- int status = 0;
-
- DBG(dev, "printer_ioctl: cmd=0x%4.4x, arg=%lu\n", code, arg);
-
- /* handle ioctls */
-
- spin_lock_irqsave(&dev->lock, flags);
-
- switch (code) {
- case GADGET_GET_PRINTER_STATUS:
- status = (int)dev->printer_status;
- break;
- case GADGET_SET_PRINTER_STATUS:
- dev->printer_status = (u8)arg;
- break;
- default:
- /* could not handle ioctl */
- DBG(dev, "printer_ioctl: ERROR cmd=0x%4.4xis not supported\n",
- code);
- status = -ENOTTY;
- }
-
- spin_unlock_irqrestore(&dev->lock, flags);
-
- return status;
-}
-
-/* used after endpoint configuration */
-static const struct file_operations printer_io_operations = {
- .owner = THIS_MODULE,
- .open = printer_open,
- .read = printer_read,
- .write = printer_write,
- .fsync = printer_fsync,
- .poll = printer_poll,
- .unlocked_ioctl = printer_ioctl,
- .release = printer_close,
- .llseek = noop_llseek,
-};
-
-/*-------------------------------------------------------------------------*/
-
-static int
-set_printer_interface(struct printer_dev *dev)
-{
- int result = 0;
-
- dev->in_ep->desc = ep_desc(dev->gadget, &hs_ep_in_desc, &fs_ep_in_desc);
- dev->in_ep->driver_data = dev;
-
- dev->out_ep->desc = ep_desc(dev->gadget, &hs_ep_out_desc,
- &fs_ep_out_desc);
- dev->out_ep->driver_data = dev;
-
- result = usb_ep_enable(dev->in_ep);
- if (result != 0) {
- DBG(dev, "enable %s --> %d\n", dev->in_ep->name, result);
- goto done;
- }
-
- result = usb_ep_enable(dev->out_ep);
- if (result != 0) {
- DBG(dev, "enable %s --> %d\n", dev->in_ep->name, result);
- goto done;
- }
-
-done:
- /* on error, disable any endpoints */
- if (result != 0) {
- (void) usb_ep_disable(dev->in_ep);
- (void) usb_ep_disable(dev->out_ep);
- dev->in_ep->desc = NULL;
- dev->out_ep->desc = NULL;
- }
-
- /* caller is responsible for cleanup on error */
- return result;
-}
-
-static void printer_reset_interface(struct printer_dev *dev)
-{
- if (dev->interface < 0)
- return;
-
- DBG(dev, "%s\n", __func__);
-
- if (dev->in_ep->desc)
- usb_ep_disable(dev->in_ep);
-
- if (dev->out_ep->desc)
- usb_ep_disable(dev->out_ep);
-
- dev->in_ep->desc = NULL;
- dev->out_ep->desc = NULL;
- dev->interface = -1;
-}
-
-/* Change our operational Interface. */
-static int set_interface(struct printer_dev *dev, unsigned number)
-{
- int result = 0;
-
- /* Free the current interface */
- printer_reset_interface(dev);
-
- result = set_printer_interface(dev);
- if (result)
- printer_reset_interface(dev);
- else
- dev->interface = number;
-
- if (!result)
- INFO(dev, "Using interface %x\n", number);
-
- return result;
-}
-
-static void printer_soft_reset(struct printer_dev *dev)
-{
- struct usb_request *req;
-
- INFO(dev, "Received Printer Reset Request\n");
-
- if (usb_ep_disable(dev->in_ep))
- DBG(dev, "Failed to disable USB in_ep\n");
- if (usb_ep_disable(dev->out_ep))
- DBG(dev, "Failed to disable USB out_ep\n");
-
- if (dev->current_rx_req != NULL) {
- list_add(&dev->current_rx_req->list, &dev->rx_reqs);
- dev->current_rx_req = NULL;
- }
- dev->current_rx_bytes = 0;
- dev->current_rx_buf = NULL;
- dev->reset_printer = 1;
-
- while (likely(!(list_empty(&dev->rx_buffers)))) {
- req = container_of(dev->rx_buffers.next, struct usb_request,
- list);
- list_del_init(&req->list);
- list_add(&req->list, &dev->rx_reqs);
- }
-
- while (likely(!(list_empty(&dev->rx_reqs_active)))) {
- req = container_of(dev->rx_buffers.next, struct usb_request,
- list);
- list_del_init(&req->list);
- list_add(&req->list, &dev->rx_reqs);
- }
-
- while (likely(!(list_empty(&dev->tx_reqs_active)))) {
- req = container_of(dev->tx_reqs_active.next,
- struct usb_request, list);
- list_del_init(&req->list);
- list_add(&req->list, &dev->tx_reqs);
- }
-
- if (usb_ep_enable(dev->in_ep))
- DBG(dev, "Failed to enable USB in_ep\n");
- if (usb_ep_enable(dev->out_ep))
- DBG(dev, "Failed to enable USB out_ep\n");
-
- wake_up_interruptible(&dev->rx_wait);
- wake_up_interruptible(&dev->tx_wait);
- wake_up_interruptible(&dev->tx_flush_wait);
-}
-
-/*-------------------------------------------------------------------------*/
-
-/*
- * The setup() callback implements all the ep0 functionality that's not
- * handled lower down.
- */
-static int printer_func_setup(struct usb_function *f,
- const struct usb_ctrlrequest *ctrl)
-{
- struct printer_dev *dev = container_of(f, struct printer_dev, function);
- struct usb_composite_dev *cdev = f->config->cdev;
- struct usb_request *req = cdev->req;
- int value = -EOPNOTSUPP;
- u16 wIndex = le16_to_cpu(ctrl->wIndex);
- u16 wValue = le16_to_cpu(ctrl->wValue);
- u16 wLength = le16_to_cpu(ctrl->wLength);
-
- DBG(dev, "ctrl req%02x.%02x v%04x i%04x l%d\n",
- ctrl->bRequestType, ctrl->bRequest, wValue, wIndex, wLength);
-
- switch (ctrl->bRequestType&USB_TYPE_MASK) {
- case USB_TYPE_CLASS:
- switch (ctrl->bRequest) {
- case 0: /* Get the IEEE-1284 PNP String */
- /* Only one printer interface is supported. */
- if ((wIndex>>8) != dev->interface)
- break;
-
- value = (pnp_string[0]<<8)|pnp_string[1];
- memcpy(req->buf, pnp_string, value);
- DBG(dev, "1284 PNP String: %x %s\n", value,
- &pnp_string[2]);
- break;
-
- case 1: /* Get Port Status */
- /* Only one printer interface is supported. */
- if (wIndex != dev->interface)
- break;
-
- *(u8 *)req->buf = dev->printer_status;
- value = min(wLength, (u16) 1);
- break;
-
- case 2: /* Soft Reset */
- /* Only one printer interface is supported. */
- if (wIndex != dev->interface)
- break;
-
- printer_soft_reset(dev);
-
- value = 0;
- break;
-
- default:
- goto unknown;
- }
- break;
-
- default:
-unknown:
- VDBG(dev,
- "unknown ctrl req%02x.%02x v%04x i%04x l%d\n",
- ctrl->bRequestType, ctrl->bRequest,
- wValue, wIndex, wLength);
- break;
- }
- /* host either stalls (value < 0) or reports success */
- return value;
-}
-
-static int __init printer_func_bind(struct usb_configuration *c,
- struct usb_function *f)
-{
- struct printer_dev *dev = container_of(f, struct printer_dev, function);
- struct usb_composite_dev *cdev = c->cdev;
- struct usb_ep *in_ep;
- struct usb_ep *out_ep = NULL;
- int id;
- int ret;
-
- id = usb_interface_id(c, f);
- if (id < 0)
- return id;
- intf_desc.bInterfaceNumber = id;
-
- /* all we really need is bulk IN/OUT */
- in_ep = usb_ep_autoconfig(cdev->gadget, &fs_ep_in_desc);
- if (!in_ep) {
-autoconf_fail:
- dev_err(&cdev->gadget->dev, "can't autoconfigure on %s\n",
- cdev->gadget->name);
- return -ENODEV;
- }
- in_ep->driver_data = in_ep; /* claim */
-
- out_ep = usb_ep_autoconfig(cdev->gadget, &fs_ep_out_desc);
- if (!out_ep)
- goto autoconf_fail;
- out_ep->driver_data = out_ep; /* claim */
-
- /* assumes that all endpoints are dual-speed */
- hs_ep_in_desc.bEndpointAddress = fs_ep_in_desc.bEndpointAddress;
- hs_ep_out_desc.bEndpointAddress = fs_ep_out_desc.bEndpointAddress;
-
- ret = usb_assign_descriptors(f, fs_printer_function,
- hs_printer_function, NULL);
- if (ret)
- return ret;
-
- dev->in_ep = in_ep;
- dev->out_ep = out_ep;
- return 0;
-}
-
-static void printer_func_unbind(struct usb_configuration *c,
- struct usb_function *f)
-{
- usb_free_all_descriptors(f);
-}
-
-static int printer_func_set_alt(struct usb_function *f,
- unsigned intf, unsigned alt)
-{
- struct printer_dev *dev = container_of(f, struct printer_dev, function);
- int ret = -ENOTSUPP;
-
- if (!alt)
- ret = set_interface(dev, intf);
-
- return ret;
-}
-
-static void printer_func_disable(struct usb_function *f)
-{
- struct printer_dev *dev = container_of(f, struct printer_dev, function);
- unsigned long flags;
-
- DBG(dev, "%s\n", __func__);
-
- spin_lock_irqsave(&dev->lock, flags);
- printer_reset_interface(dev);
- spin_unlock_irqrestore(&dev->lock, flags);
-}
-
-static void printer_cfg_unbind(struct usb_configuration *c)
-{
- struct printer_dev *dev;
- struct usb_request *req;
-
- dev = &usb_printer_gadget;
-
- DBG(dev, "%s\n", __func__);
-
- /* Remove sysfs files */
- device_destroy(usb_gadget_class, g_printer_devno);
-
- /* Remove Character Device */
- cdev_del(&dev->printer_cdev);
-
- /* we must already have been disconnected ... no i/o may be active */
- WARN_ON(!list_empty(&dev->tx_reqs_active));
- WARN_ON(!list_empty(&dev->rx_reqs_active));
-
- /* Free all memory for this driver. */
- while (!list_empty(&dev->tx_reqs)) {
- req = container_of(dev->tx_reqs.next, struct usb_request,
- list);
- list_del(&req->list);
- printer_req_free(dev->in_ep, req);
- }
-
- if (dev->current_rx_req != NULL)
- printer_req_free(dev->out_ep, dev->current_rx_req);
-
- while (!list_empty(&dev->rx_reqs)) {
- req = container_of(dev->rx_reqs.next,
- struct usb_request, list);
- list_del(&req->list);
- printer_req_free(dev->out_ep, req);
- }
-
- while (!list_empty(&dev->rx_buffers)) {
- req = container_of(dev->rx_buffers.next,
- struct usb_request, list);
- list_del(&req->list);
- printer_req_free(dev->out_ep, req);
- }
-}
-
-static struct usb_configuration printer_cfg_driver = {
- .label = "printer",
- .unbind = printer_cfg_unbind,
- .bConfigurationValue = 1,
- .bmAttributes = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER,
-};
-
-static int __init printer_bind_config(struct usb_configuration *c)
-{
- struct usb_gadget *gadget = c->cdev->gadget;
- struct printer_dev *dev;
- int status = -ENOMEM;
- size_t len;
- u32 i;
- struct usb_request *req;
-
- usb_ep_autoconfig_reset(gadget);
-
- dev = &usb_printer_gadget;
-
- dev->function.name = shortname;
- dev->function.bind = printer_func_bind;
- dev->function.setup = printer_func_setup;
- dev->function.unbind = printer_func_unbind;
- dev->function.set_alt = printer_func_set_alt;
- dev->function.disable = printer_func_disable;
-
- status = usb_add_function(c, &dev->function);
- if (status)
- return status;
-
- /* Setup the sysfs files for the printer gadget. */
- dev->pdev = device_create(usb_gadget_class, NULL, g_printer_devno,
- NULL, "g_printer");
- if (IS_ERR(dev->pdev)) {
- ERROR(dev, "Failed to create device: g_printer\n");
- status = PTR_ERR(dev->pdev);
- goto fail;
- }
-
- /*
- * Register a character device as an interface to a user mode
- * program that handles the printer specific functionality.
- */
- cdev_init(&dev->printer_cdev, &printer_io_operations);
- dev->printer_cdev.owner = THIS_MODULE;
- status = cdev_add(&dev->printer_cdev, g_printer_devno, 1);
- if (status) {
- ERROR(dev, "Failed to open char device\n");
- goto fail;
- }
-
- if (iPNPstring)
- strlcpy(&pnp_string[2], iPNPstring, (sizeof pnp_string)-2);
-
- len = strlen(pnp_string);
- pnp_string[0] = (len >> 8) & 0xFF;
- pnp_string[1] = len & 0xFF;
-
- usb_gadget_set_selfpowered(gadget);
-
- if (gadget_is_otg(gadget)) {
- otg_descriptor.bmAttributes |= USB_OTG_HNP;
- printer_cfg_driver.descriptors = otg_desc;
- printer_cfg_driver.bmAttributes |= USB_CONFIG_ATT_WAKEUP;
- }
-
- spin_lock_init(&dev->lock);
- mutex_init(&dev->lock_printer_io);
- INIT_LIST_HEAD(&dev->tx_reqs);
- INIT_LIST_HEAD(&dev->tx_reqs_active);
- INIT_LIST_HEAD(&dev->rx_reqs);
- INIT_LIST_HEAD(&dev->rx_reqs_active);
- INIT_LIST_HEAD(&dev->rx_buffers);
- init_waitqueue_head(&dev->rx_wait);
- init_waitqueue_head(&dev->tx_wait);
- init_waitqueue_head(&dev->tx_flush_wait);
-
- dev->interface = -1;
- dev->printer_cdev_open = 0;
- dev->printer_status = PRINTER_NOT_ERROR;
- dev->current_rx_req = NULL;
- dev->current_rx_bytes = 0;
- dev->current_rx_buf = NULL;
-
- for (i = 0; i < QLEN; i++) {
- req = printer_req_alloc(dev->in_ep, USB_BUFSIZE, GFP_KERNEL);
- if (!req) {
- while (!list_empty(&dev->tx_reqs)) {
- req = container_of(dev->tx_reqs.next,
- struct usb_request, list);
- list_del(&req->list);
- printer_req_free(dev->in_ep, req);
- }
- return -ENOMEM;
- }
- list_add(&req->list, &dev->tx_reqs);
- }
-
- for (i = 0; i < QLEN; i++) {
- req = printer_req_alloc(dev->out_ep, USB_BUFSIZE, GFP_KERNEL);
- if (!req) {
- while (!list_empty(&dev->rx_reqs)) {
- req = container_of(dev->rx_reqs.next,
- struct usb_request, list);
- list_del(&req->list);
- printer_req_free(dev->out_ep, req);
- }
- return -ENOMEM;
- }
- list_add(&req->list, &dev->rx_reqs);
- }
-
- /* finish hookup to lower layer ... */
- dev->gadget = gadget;
-
- INFO(dev, "%s, version: " DRIVER_VERSION "\n", driver_desc);
- return 0;
-
-fail:
- printer_cfg_unbind(c);
- return status;
-}
-
-static int printer_unbind(struct usb_composite_dev *cdev)
-{
- return 0;
-}
-
-static int __init printer_bind(struct usb_composite_dev *cdev)
-{
- int ret;
-
- ret = usb_string_ids_tab(cdev, strings);
- if (ret < 0)
- return ret;
- device_desc.iManufacturer = strings[USB_GADGET_MANUFACTURER_IDX].id;
- device_desc.iProduct = strings[USB_GADGET_PRODUCT_IDX].id;
- device_desc.iSerialNumber = strings[USB_GADGET_SERIAL_IDX].id;
-
- ret = usb_add_config(cdev, &printer_cfg_driver, printer_bind_config);
- if (ret)
- return ret;
- usb_composite_overwrite_options(cdev, &coverwrite);
- return ret;
-}
-
-static __refdata struct usb_composite_driver printer_driver = {
- .name = shortname,
- .dev = &device_desc,
- .strings = dev_strings,
- .max_speed = USB_SPEED_HIGH,
- .bind = printer_bind,
- .unbind = printer_unbind,
-};
-
-static int __init
-init(void)
-{
- int status;
-
- usb_gadget_class = class_create(THIS_MODULE, "usb_printer_gadget");
- if (IS_ERR(usb_gadget_class)) {
- status = PTR_ERR(usb_gadget_class);
- pr_err("unable to create usb_gadget class %d\n", status);
- return status;
- }
-
- status = alloc_chrdev_region(&g_printer_devno, 0, 1,
- "USB printer gadget");
- if (status) {
- pr_err("alloc_chrdev_region %d\n", status);
- class_destroy(usb_gadget_class);
- return status;
- }
-
- status = usb_composite_probe(&printer_driver);
- if (status) {
- class_destroy(usb_gadget_class);
- unregister_chrdev_region(g_printer_devno, 1);
- pr_err("usb_gadget_probe_driver %x\n", status);
- }
-
- return status;
-}
-module_init(init);
-
-static void __exit
-cleanup(void)
-{
- mutex_lock(&usb_printer_gadget.lock_printer_io);
- usb_composite_unregister(&printer_driver);
- unregister_chrdev_region(g_printer_devno, 1);
- class_destroy(usb_gadget_class);
- mutex_unlock(&usb_printer_gadget.lock_printer_io);
-}
-module_exit(cleanup);
-
-MODULE_DESCRIPTION(DRIVER_DESC);
-MODULE_AUTHOR("Craig Nadler");
-MODULE_LICENSE("GPL");