| /* |
| * 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 <asm/byteorder.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 "2015 FEB 17" |
| |
| static const char shortname [] = "printer"; |
| static const char driver_desc [] = DRIVER_DESC; |
| |
| #include "u_printer.h" |
| |
| /*-------------------------------------------------------------------------*/ |
| |
| /* 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 |
| |
| static struct usb_function_instance *fi_printer; |
| static struct usb_function *f_printer; |
| |
| /*-------------------------------------------------------------------------*/ |
| |
| /* |
| * DESCRIPTORS ... most are static, but strings and (full) configuration |
| * descriptors are built on demand. |
| */ |
| |
| 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_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, |
| }; |
| |
| /*-------------------------------------------------------------------------*/ |
| |
| /* descriptors that are built on-demand */ |
| |
| static char product_desc [40] = DRIVER_DESC; |
| static char serial_num [40] = "1"; |
| static char pnp_string[PNP_STRING_LEN] = |
| "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_configuration printer_cfg_driver = { |
| .label = "printer", |
| .bConfigurationValue = 1, |
| .bmAttributes = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER, |
| }; |
| |
| static int __init printer_do_config(struct usb_configuration *c) |
| { |
| struct usb_gadget *gadget = c->cdev->gadget; |
| int status = 0; |
| |
| usb_ep_autoconfig_reset(gadget); |
| |
| 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; |
| } |
| |
| f_printer = usb_get_function(fi_printer); |
| if (IS_ERR(f_printer)) |
| return PTR_ERR(f_printer); |
| |
| status = usb_add_function(c, f_printer); |
| if (status < 0) |
| usb_put_function(f_printer); |
| |
| return status; |
| } |
| |
| static int __init printer_bind(struct usb_composite_dev *cdev) |
| { |
| 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) { |
| 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_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, |
| .strings = dev_strings, |
| .max_speed = USB_SPEED_SUPER, |
| .bind = printer_bind, |
| .unbind = printer_unbind, |
| }; |
| |
| static int __init |
| init(void) |
| { |
| return usb_composite_probe(&printer_driver); |
| } |
| module_init(init); |
| |
| static void __exit |
| cleanup(void) |
| { |
| usb_composite_unregister(&printer_driver); |
| } |
| module_exit(cleanup); |
| |
| MODULE_DESCRIPTION(DRIVER_DESC); |
| MODULE_AUTHOR("Craig Nadler"); |
| MODULE_LICENSE("GPL"); |