diff options
Diffstat (limited to 'drivers/usb/gadget/legacy/printer.c')
| -rw-r--r-- | drivers/usb/gadget/legacy/printer.c | 1239 |
1 files changed, 48 insertions, 1191 deletions
diff --git a/drivers/usb/gadget/legacy/printer.c b/drivers/usb/gadget/legacy/printer.c index 90545980542f..d5b6ee725a2a 100644 --- a/drivers/usb/gadget/legacy/printer.c +++ b/drivers/usb/gadget/legacy/printer.c @@ -12,29 +12,7 @@ #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> @@ -46,50 +24,12 @@ USB_GADGET_COMPOSITE_OPTIONS(); #define DRIVER_DESC "Printer Gadget" -#define DRIVER_VERSION "2007 OCT 06" +#define DRIVER_VERSION "2015 FEB 17" -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; +#include "u_printer.h" /*-------------------------------------------------------------------------*/ @@ -120,6 +60,9 @@ module_param(qlen, uint, S_IRUGO|S_IWUSR); #define QLEN qlen +static struct usb_function_instance *fi_printer; +static struct usb_function *f_printer; + /*-------------------------------------------------------------------------*/ /* @@ -127,10 +70,6 @@ module_param(qlen, uint, S_IRUGO|S_IWUSR); * 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, @@ -143,108 +82,6 @@ static struct usb_device_descriptor device_desc = { .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 -}; - -/* - * Added endpoint descriptors for 3.0 devices - */ - -static struct usb_endpoint_descriptor ss_ep_in_desc = { - .bLength = USB_DT_ENDPOINT_SIZE, - .bDescriptorType = USB_DT_ENDPOINT, - .bmAttributes = USB_ENDPOINT_XFER_BULK, - .wMaxPacketSize = cpu_to_le16(1024), -}; - -static struct usb_ss_ep_comp_descriptor ss_ep_in_comp_desc = { - .bLength = sizeof(ss_ep_in_comp_desc), - .bDescriptorType = USB_DT_SS_ENDPOINT_COMP, -}; - -static struct usb_endpoint_descriptor ss_ep_out_desc = { - .bLength = USB_DT_ENDPOINT_SIZE, - .bDescriptorType = USB_DT_ENDPOINT, - .bmAttributes = USB_ENDPOINT_XFER_BULK, - .wMaxPacketSize = cpu_to_le16(1024), -}; - -static struct usb_ss_ep_comp_descriptor ss_ep_out_comp_desc = { - .bLength = sizeof(ss_ep_out_comp_desc), - .bDescriptorType = USB_DT_SS_ENDPOINT_COMP, -}; - -static struct usb_descriptor_header *ss_printer_function[] = { - (struct usb_descriptor_header *) &intf_desc, - (struct usb_descriptor_header *) &ss_ep_in_desc, - (struct usb_descriptor_header *) &ss_ep_in_comp_desc, - (struct usb_descriptor_header *) &ss_ep_out_desc, - (struct usb_descriptor_header *) &ss_ep_out_comp_desc, - NULL -}; - static struct usb_otg_descriptor otg_descriptor = { .bLength = sizeof otg_descriptor, .bDescriptorType = USB_DT_OTG, @@ -256,29 +93,13 @@ static const struct usb_descriptor_header *otg_desc[] = { NULL, }; -/* maxpacket and other transfer characteristics vary by speed. */ -static inline struct usb_endpoint_descriptor *ep_desc(struct usb_gadget *gadget, - struct usb_endpoint_descriptor *fs, - struct usb_endpoint_descriptor *hs, - struct usb_endpoint_descriptor *ss) -{ - switch (gadget->speed) { - case USB_SPEED_SUPER: - return ss; - case USB_SPEED_HIGH: - return hs; - default: - return 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] = +static char pnp_string[PNP_STRING_LEN] = "XXMFG:linux;MDL:g_printer;CLS:PRINTER;SN:1;"; /* static strings, in UTF-8 */ @@ -299,921 +120,19 @@ static struct usb_gadget_strings *dev_strings[] = { 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(¤t_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(¤t_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, &fs_ep_in_desc, &hs_ep_in_desc, - &ss_ep_in_desc); - dev->in_ep->driver_data = dev; - - dev->out_ep->desc = ep_desc(dev->gadget, &fs_ep_out_desc, - &hs_ep_out_desc, &ss_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; - ss_ep_in_desc.bEndpointAddress = fs_ep_in_desc.bEndpointAddress; - ss_ep_out_desc.bEndpointAddress = fs_ep_out_desc.bEndpointAddress; - - ret = usb_assign_descriptors(f, fs_printer_function, - hs_printer_function, ss_printer_function); - 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) +static int __init printer_do_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; + int status = 0; 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)) { @@ -1222,86 +141,64 @@ static int __init printer_bind_config(struct usb_configuration *c) 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; + f_printer = usb_get_function(fi_printer); + if (IS_ERR(f_printer)) + return PTR_ERR(f_printer); - INFO(dev, "%s, version: " DRIVER_VERSION "\n", driver_desc); - return 0; + status = usb_add_function(c, f_printer); + if (status < 0) + usb_put_function(f_printer); -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; + struct f_printer_opts *opts; + int ret, len; + + fi_printer = usb_get_function_instance("printer"); + if (IS_ERR(fi_printer)) + return PTR_ERR(fi_printer); + + if (iPNPstring) + strlcpy(&pnp_string[2], iPNPstring, PNP_STRING_LEN - 2); + + len = strlen(pnp_string); + pnp_string[0] = (len >> 8) & 0xFF; + pnp_string[1] = len & 0xFF; + + opts = container_of(fi_printer, struct f_printer_opts, func_inst); + opts->minor = 0; + memcpy(opts->pnp_string, pnp_string, PNP_STRING_LEN); + opts->q_len = QLEN; ret = usb_string_ids_tab(cdev, strings); - if (ret < 0) + if (ret < 0) { + usb_put_function_instance(fi_printer); 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) + ret = usb_add_config(cdev, &printer_cfg_driver, printer_do_config); + if (ret) { + usb_put_function_instance(fi_printer); return ret; + } usb_composite_overwrite_options(cdev, &coverwrite); return ret; } +static int __exit printer_unbind(struct usb_composite_dev *cdev) +{ + usb_put_function(f_printer); + usb_put_function_instance(fi_printer); + + return 0; +} + static __refdata struct usb_composite_driver printer_driver = { .name = shortname, .dev = &device_desc, @@ -1311,47 +208,7 @@ static __refdata struct usb_composite_driver printer_driver = { .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_usb_composite_driver(printer_driver); MODULE_DESCRIPTION(DRIVER_DESC); MODULE_AUTHOR("Craig Nadler"); |