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-rw-r--r--drivers/usb/gadget/Kconfig3
-rw-r--r--drivers/usb/gadget/function/Makefile2
-rw-r--r--drivers/usb/gadget/function/f_printer.c185
-rw-r--r--drivers/usb/gadget/function/u_printer.h30
-rw-r--r--drivers/usb/gadget/legacy/printer.c1
5 files changed, 220 insertions, 1 deletions
diff --git a/drivers/usb/gadget/Kconfig b/drivers/usb/gadget/Kconfig
index b454d05be583..9d507cf98f94 100644
--- a/drivers/usb/gadget/Kconfig
+++ b/drivers/usb/gadget/Kconfig
@@ -196,6 +196,9 @@ config USB_F_MIDI
config USB_F_HID
tristate
+config USB_F_PRINTER
+ tristate
+
choice
tristate "USB Gadget Drivers"
default USB_ETH
diff --git a/drivers/usb/gadget/function/Makefile b/drivers/usb/gadget/function/Makefile
index f71b1aaa0edf..bd7def576955 100644
--- a/drivers/usb/gadget/function/Makefile
+++ b/drivers/usb/gadget/function/Makefile
@@ -42,3 +42,5 @@ usb_f_midi-y := f_midi.o
obj-$(CONFIG_USB_F_MIDI) += usb_f_midi.o
usb_f_hid-y := f_hid.o
obj-$(CONFIG_USB_F_HID) += usb_f_hid.o
+usb_f_printer-y := f_printer.o
+obj-$(CONFIG_USB_F_PRINTER) += usb_f_printer.o
diff --git a/drivers/usb/gadget/function/f_printer.c b/drivers/usb/gadget/function/f_printer.c
index 0847972b9686..93f4d4e61fef 100644
--- a/drivers/usb/gadget/function/f_printer.c
+++ b/drivers/usb/gadget/function/f_printer.c
@@ -24,6 +24,7 @@
#include <linux/mutex.h>
#include <linux/errno.h>
#include <linux/init.h>
+#include <linux/idr.h>
#include <linux/timer.h>
#include <linux/list.h>
#include <linux/interrupt.h>
@@ -46,6 +47,8 @@
#include <linux/usb/gadget.h>
#include <linux/usb/g_printer.h>
+#include "u_printer.h"
+
#define PNP_STRING_LEN 1024
#define PRINTER_MINORS 4
#define GET_DEVICE_ID 0
@@ -54,6 +57,10 @@
static int major, minors;
static struct class *usb_gadget_class;
+#ifndef USBF_PRINTER_INCLUDED
+static DEFINE_IDA(printer_ida);
+static DEFINE_MUTEX(printer_ida_lock); /* protects access do printer_ida */
+#endif
/*-------------------------------------------------------------------------*/
@@ -999,7 +1006,7 @@ unknown:
return value;
}
-static int __init printer_func_bind(struct usb_configuration *c,
+static int printer_func_bind(struct usb_configuration *c,
struct usb_function *f)
{
struct usb_gadget *gadget = c->cdev->gadget;
@@ -1111,6 +1118,7 @@ fail_tx_reqs:
}
+#ifdef USBF_PRINTER_INCLUDED
static void printer_func_unbind(struct usb_configuration *c,
struct usb_function *f)
{
@@ -1155,6 +1163,7 @@ static void printer_func_unbind(struct usb_configuration *c,
usb_free_all_descriptors(f);
kfree(dev);
}
+#endif
static int printer_func_set_alt(struct usb_function *f,
unsigned intf, unsigned alt)
@@ -1180,6 +1189,7 @@ static void printer_func_disable(struct usb_function *f)
spin_unlock_irqrestore(&dev->lock, flags);
}
+#ifdef USBF_PRINTER_INCLUDED
static int f_printer_bind_config(struct usb_configuration *c, char *pnp_str,
char *pnp_string, unsigned q_len, int minor)
{
@@ -1240,6 +1250,179 @@ static int f_printer_bind_config(struct usb_configuration *c, char *pnp_str,
INFO(dev, "%s, version: " DRIVER_VERSION "\n", driver_desc);
return 0;
}
+#else
+static inline int gprinter_get_minor(void)
+{
+ return ida_simple_get(&printer_ida, 0, 0, GFP_KERNEL);
+}
+
+static inline void gprinter_put_minor(int minor)
+{
+ ida_simple_remove(&printer_ida, minor);
+}
+
+static int gprinter_setup(int);
+static void gprinter_cleanup(void);
+
+static void gprinter_free_inst(struct usb_function_instance *f)
+{
+ struct f_printer_opts *opts;
+
+ opts = container_of(f, struct f_printer_opts, func_inst);
+
+ mutex_lock(&printer_ida_lock);
+
+ gprinter_put_minor(opts->minor);
+ if (idr_is_empty(&printer_ida.idr))
+ gprinter_cleanup();
+
+ mutex_unlock(&printer_ida_lock);
+
+ kfree(opts);
+}
+
+static struct usb_function_instance *gprinter_alloc_inst(void)
+{
+ struct f_printer_opts *opts;
+ struct usb_function_instance *ret;
+ int status = 0;
+
+ opts = kzalloc(sizeof(*opts), GFP_KERNEL);
+ if (!opts)
+ return ERR_PTR(-ENOMEM);
+
+ opts->func_inst.free_func_inst = gprinter_free_inst;
+ ret = &opts->func_inst;
+
+ mutex_lock(&printer_ida_lock);
+
+ if (idr_is_empty(&printer_ida.idr)) {
+ status = gprinter_setup(PRINTER_MINORS);
+ if (status) {
+ ret = ERR_PTR(status);
+ kfree(opts);
+ goto unlock;
+ }
+ }
+
+ opts->minor = gprinter_get_minor();
+ if (opts->minor < 0) {
+ ret = ERR_PTR(opts->minor);
+ kfree(opts);
+ if (idr_is_empty(&printer_ida.idr))
+ gprinter_cleanup();
+ }
+
+unlock:
+ mutex_unlock(&printer_ida_lock);
+ return ret;
+}
+
+static void gprinter_free(struct usb_function *f)
+{
+ struct printer_dev *dev = func_to_printer(f);
+
+ kfree(dev);
+}
+
+static void printer_func_unbind(struct usb_configuration *c,
+ struct usb_function *f)
+{
+ struct printer_dev *dev;
+ struct usb_request *req;
+
+ dev = func_to_printer(f);
+
+ device_destroy(usb_gadget_class, MKDEV(major, dev->minor));
+
+ /* 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);
+ }
+ usb_free_all_descriptors(f);
+}
+
+static struct usb_function *gprinter_alloc(struct usb_function_instance *fi)
+{
+ struct printer_dev *dev;
+ struct f_printer_opts *opts;
+
+ opts = container_of(fi, struct f_printer_opts, func_inst);
+
+ if (opts->minor >= minors)
+ return ERR_PTR(-ENOENT);
+
+ dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+ if (!dev)
+ return ERR_PTR(-ENOMEM);
+
+ dev->minor = opts->minor;
+ dev->pnp_string = opts->pnp_string;
+ dev->q_len = opts->q_len;
+
+ dev->function.name = "printer";
+ 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;
+ dev->function.req_match = gprinter_req_match;
+ dev->function.free_func = gprinter_free;
+
+ INIT_LIST_HEAD(&dev->tx_reqs);
+ INIT_LIST_HEAD(&dev->rx_reqs);
+ INIT_LIST_HEAD(&dev->rx_buffers);
+ INIT_LIST_HEAD(&dev->tx_reqs_active);
+ INIT_LIST_HEAD(&dev->rx_reqs_active);
+
+ spin_lock_init(&dev->lock);
+ mutex_init(&dev->lock_printer_io);
+ 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;
+
+ return &dev->function;
+}
+
+DECLARE_USB_FUNCTION_INIT(printer, gprinter_alloc_inst, gprinter_alloc);
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Craig Nadler");
+
+#endif
static int gprinter_setup(int count)
{
diff --git a/drivers/usb/gadget/function/u_printer.h b/drivers/usb/gadget/function/u_printer.h
new file mode 100644
index 000000000000..b2338cacdfe4
--- /dev/null
+++ b/drivers/usb/gadget/function/u_printer.h
@@ -0,0 +1,30 @@
+/*
+ * u_printer.h
+ *
+ * Utility definitions for the printer function
+ *
+ * Copyright (c) 2015 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com
+ *
+ * Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef U_PRINTER_H
+#define U_PRINTER_H
+
+#include <linux/usb/composite.h>
+
+#define PNP_STRING_LEN 1024
+
+struct f_printer_opts {
+ struct usb_function_instance func_inst;
+ int minor;
+ char pnp_string[PNP_STRING_LEN];
+ unsigned q_len;
+};
+
+#endif /* U_PRINTER_H */
diff --git a/drivers/usb/gadget/legacy/printer.c b/drivers/usb/gadget/legacy/printer.c
index 4d926d08df02..770b5041323e 100644
--- a/drivers/usb/gadget/legacy/printer.c
+++ b/drivers/usb/gadget/legacy/printer.c
@@ -33,6 +33,7 @@ static const char driver_desc [] = DRIVER_DESC;
* This will be changed when f_printer is converted
* to the new function interface.
*/
+#define USBF_PRINTER_INCLUDED
#include "f_printer.c"
/*-------------------------------------------------------------------------*/
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-06 06:31:13 +0000