// SPDX-License-Identifier: GPL-2.0+ /*****************************************************************************/ /* * uss720.c -- USS720 USB Parport Cable. * * Copyright (C) 1999, 2005, 2010 * Thomas Sailer ([email protected]) * * Based on parport_pc.c * * History: * 0.1 04.08.1999 Created * 0.2 07.08.1999 Some fixes mainly suggested by Tim Waugh * Interrupt handling currently disabled because * usb_request_irq crashes somewhere within ohci.c * for no apparent reason (that is for me, anyway) * ECP currently untested * 0.3 10.08.1999 fixing merge errors * 0.4 13.08.1999 Added Vendor/Product ID of Brad Hard's cable * 0.5 20.09.1999 usb_control_msg wrapper used * Nov01.2000 usb_device_table support by Adam J. Richter * 08.04.2001 Identify version on module load. gb * 0.6 02.09.2005 Fix "scheduling in interrupt" problem by making save/restore * context asynchronous * */ /*****************************************************************************/ #include <linux/module.h> #include <linux/socket.h> #include <linux/parport.h> #include <linux/init.h> #include <linux/usb.h> #include <linux/delay.h> #include <linux/completion.h> #include <linux/kref.h> #include <linux/slab.h> #include <linux/sched/signal.h> #define DRIVER_AUTHOR … #define DRIVER_DESC … /* --------------------------------------------------------------------- */ struct parport_uss720_private { … }; struct uss720_async_request { … }; /* --------------------------------------------------------------------- */ static void destroy_priv(struct kref *kref) { … } static void destroy_async(struct kref *kref) { … } /* --------------------------------------------------------------------- */ static void async_complete(struct urb *urb) { … } static struct uss720_async_request *submit_async_request(struct parport_uss720_private *priv, __u8 request, __u8 requesttype, __u16 value, __u16 index, gfp_t mem_flags) { … } static unsigned int kill_all_async_requests_priv(struct parport_uss720_private *priv) { … } /* --------------------------------------------------------------------- */ static int get_1284_register(struct parport *pp, unsigned char reg, unsigned char *val, gfp_t mem_flags) { … } static int set_1284_register(struct parport *pp, unsigned char reg, unsigned char val, gfp_t mem_flags) { … } /* --------------------------------------------------------------------- */ /* ECR modes */ #define ECR_SPP … #define ECR_PS2 … #define ECR_PPF … #define ECR_ECP … #define ECR_EPP … /* Safely change the mode bits in the ECR */ static int change_mode(struct parport *pp, int m) { … } /* * Clear TIMEOUT BIT in EPP MODE */ static int clear_epp_timeout(struct parport *pp) { … } /* * Access functions. */ #if 0 static int uss720_irq(int usbstatus, void *buffer, int len, void *dev_id) { struct parport *pp = (struct parport *)dev_id; struct parport_uss720_private *priv = pp->private_data; if (usbstatus != 0 || len < 4 || !buffer) return 1; memcpy(priv->reg, buffer, 4); /* if nAck interrupts are enabled and we have an interrupt, call the interrupt procedure */ if (priv->reg[2] & priv->reg[1] & 0x10) parport_generic_irq(pp); return 1; } #endif static void parport_uss720_write_data(struct parport *pp, unsigned char d) { … } static unsigned char parport_uss720_read_data(struct parport *pp) { … } static void parport_uss720_write_control(struct parport *pp, unsigned char d) { … } static unsigned char parport_uss720_read_control(struct parport *pp) { … } static unsigned char parport_uss720_frob_control(struct parport *pp, unsigned char mask, unsigned char val) { … } static unsigned char parport_uss720_read_status(struct parport *pp) { … } static void parport_uss720_disable_irq(struct parport *pp) { … } static void parport_uss720_enable_irq(struct parport *pp) { … } static void parport_uss720_data_forward (struct parport *pp) { … } static void parport_uss720_data_reverse (struct parport *pp) { … } static void parport_uss720_init_state(struct pardevice *dev, struct parport_state *s) { … } static void parport_uss720_save_state(struct parport *pp, struct parport_state *s) { … } static void parport_uss720_restore_state(struct parport *pp, struct parport_state *s) { … } static size_t parport_uss720_epp_read_data(struct parport *pp, void *buf, size_t length, int flags) { … } static size_t parport_uss720_epp_write_data(struct parport *pp, const void *buf, size_t length, int flags) { … } static size_t parport_uss720_epp_read_addr(struct parport *pp, void *buf, size_t length, int flags) { … } static size_t parport_uss720_epp_write_addr(struct parport *pp, const void *buf, size_t length, int flags) { … } static size_t parport_uss720_ecp_write_data(struct parport *pp, const void *buffer, size_t len, int flags) { … } static size_t parport_uss720_ecp_read_data(struct parport *pp, void *buffer, size_t len, int flags) { … } static size_t parport_uss720_ecp_write_addr(struct parport *pp, const void *buffer, size_t len, int flags) { … } static size_t parport_uss720_write_compat(struct parport *pp, const void *buffer, size_t len, int flags) { … } /* --------------------------------------------------------------------- */ static struct parport_operations parport_uss720_ops = …; /* --------------------------------------------------------------------- */ static int uss720_probe(struct usb_interface *intf, const struct usb_device_id *id) { … } static void uss720_disconnect(struct usb_interface *intf) { … } /* table of cables that work through this driver */ static const struct usb_device_id uss720_table[] = …; MODULE_DEVICE_TABLE (usb, uss720_table); static struct usb_driver uss720_driver = …; /* --------------------------------------------------------------------- */ MODULE_AUTHOR(…); MODULE_DESCRIPTION(…); MODULE_LICENSE(…) …; static int __init uss720_init(void) { … } static void __exit uss720_cleanup(void) { … } module_init(…) …; module_exit(uss720_cleanup); /* --------------------------------------------------------------------- */
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