Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * linux/drivers/char/ppdev.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * This is the code behind /dev/parport* -- it allows a user-space
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * application to use the parport subsystem.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  * Copyright (C) 1998-2000, 2002 Tim Waugh <tim@cyberelk.net>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  * A /dev/parportx device node represents an arbitrary device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11)  * on port 'x'.  The following operations are possible:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13)  * open		do nothing, set up default IEEE 1284 protocol to be COMPAT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14)  * close	release port and unregister device (if necessary)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15)  * ioctl
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16)  *   EXCL	register device exclusively (may fail)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17)  *   CLAIM	(register device first time) parport_claim_or_block
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18)  *   RELEASE	parport_release
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19)  *   SETMODE	set the IEEE 1284 protocol to use for read/write
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20)  *   SETPHASE	set the IEEE 1284 phase of a particular mode.  Not to be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21)  *              confused with ioctl(fd, SETPHASER, &stun). ;-)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22)  *   DATADIR	data_forward / data_reverse
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23)  *   WDATA	write_data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24)  *   RDATA	read_data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25)  *   WCONTROL	write_control
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26)  *   RCONTROL	read_control
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27)  *   FCONTROL	frob_control
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28)  *   RSTATUS	read_status
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29)  *   NEGOT	parport_negotiate
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30)  *   YIELD	parport_yield_blocking
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31)  *   WCTLONIRQ	on interrupt, set control lines
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32)  *   CLRIRQ	clear (and return) interrupt count
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33)  *   SETTIME	sets device timeout (struct timeval)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34)  *   GETTIME	gets device timeout (struct timeval)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35)  *   GETMODES	gets hardware supported modes (unsigned int)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36)  *   GETMODE	gets the current IEEE1284 mode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37)  *   GETPHASE   gets the current IEEE1284 phase
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38)  *   GETFLAGS   gets current (user-visible) flags
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39)  *   SETFLAGS   sets current (user-visible) flags
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40)  * read/write	read or write in current IEEE 1284 protocol
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41)  * select	wait for interrupt (in readfds)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43)  * Changes:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44)  * Added SETTIME/GETTIME ioctl, Fred Barnes, 1999.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46)  * Arnaldo Carvalho de Melo <acme@conectiva.com.br> 2000/08/25
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47)  * - On error, copy_from_user and copy_to_user do not return -EFAULT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48)  *   They return the positive number of bytes *not* copied due to address
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49)  *   space errors.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51)  * Added GETMODES/GETMODE/GETPHASE ioctls, Fred Barnes <frmb2@ukc.ac.uk>, 03/01/2001.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52)  * Added GETFLAGS/SETFLAGS ioctls, Fred Barnes, 04/2001
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) #include <linux/sched/signal.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) #include <linux/device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) #include <linux/ioctl.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) #include <linux/parport.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) #include <linux/ctype.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) #include <linux/poll.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) #include <linux/major.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) #include <linux/ppdev.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) #include <linux/mutex.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) #include <linux/compat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) #define PP_VERSION "ppdev: user-space parallel port driver"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) #define CHRDEV "ppdev"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) struct pp_struct {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	struct pardevice *pdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	wait_queue_head_t irq_wait;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	atomic_t irqc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	unsigned int flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	int irqresponse;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	unsigned char irqctl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	struct ieee1284_info state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	struct ieee1284_info saved_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	long default_inactivity;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	int index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) /* should we use PARDEVICE_MAX here? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) static struct device *devices[PARPORT_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) static DEFINE_IDA(ida_index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) /* pp_struct.flags bitfields */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) #define PP_CLAIMED    (1<<0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) #define PP_EXCL       (1<<1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) /* Other constants */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) #define PP_INTERRUPT_TIMEOUT (10 * HZ) /* 10s */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) #define PP_BUFFER_SIZE 1024
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) #define PARDEVICE_MAX 8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) static DEFINE_MUTEX(pp_do_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) /* define fixed sized ioctl cmd for y2038 migration */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) #define PPGETTIME32	_IOR(PP_IOCTL, 0x95, s32[2])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) #define PPSETTIME32	_IOW(PP_IOCTL, 0x96, s32[2])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) #define PPGETTIME64	_IOR(PP_IOCTL, 0x95, s64[2])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) #define PPSETTIME64	_IOW(PP_IOCTL, 0x96, s64[2])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) static inline void pp_enable_irq(struct pp_struct *pp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	struct parport *port = pp->pdev->port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	port->ops->enable_irq(port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) static ssize_t pp_read(struct file *file, char __user *buf, size_t count,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 		       loff_t *ppos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	unsigned int minor = iminor(file_inode(file));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	struct pp_struct *pp = file->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	char *kbuffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	ssize_t bytes_read = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	struct parport *pport;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	int mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	if (!(pp->flags & PP_CLAIMED)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 		/* Don't have the port claimed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 		pr_debug(CHRDEV "%x: claim the port first\n", minor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	/* Trivial case. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	if (count == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	kbuffer = kmalloc(min_t(size_t, count, PP_BUFFER_SIZE), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	if (!kbuffer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	pport = pp->pdev->port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	mode = pport->ieee1284.mode & ~(IEEE1284_DEVICEID | IEEE1284_ADDR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	parport_set_timeout(pp->pdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 			    (file->f_flags & O_NONBLOCK) ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 			    PARPORT_INACTIVITY_O_NONBLOCK :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 			    pp->default_inactivity);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	while (bytes_read == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 		ssize_t need = min_t(unsigned long, count, PP_BUFFER_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 		if (mode == IEEE1284_MODE_EPP) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 			/* various specials for EPP mode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 			int flags = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 			size_t (*fn)(struct parport *, void *, size_t, int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 			if (pp->flags & PP_W91284PIC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 				flags |= PARPORT_W91284PIC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 			if (pp->flags & PP_FASTREAD)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 				flags |= PARPORT_EPP_FAST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 			if (pport->ieee1284.mode & IEEE1284_ADDR)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 				fn = pport->ops->epp_read_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 			else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 				fn = pport->ops->epp_read_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 			bytes_read = (*fn)(pport, kbuffer, need, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 		} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 			bytes_read = parport_read(pport, kbuffer, need);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 		if (bytes_read != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 		if (file->f_flags & O_NONBLOCK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 			bytes_read = -EAGAIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 		if (signal_pending(current)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 			bytes_read = -ERESTARTSYS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 		cond_resched();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	parport_set_timeout(pp->pdev, pp->default_inactivity);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	if (bytes_read > 0 && copy_to_user(buf, kbuffer, bytes_read))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 		bytes_read = -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	kfree(kbuffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	pp_enable_irq(pp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	return bytes_read;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) static ssize_t pp_write(struct file *file, const char __user *buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 			size_t count, loff_t *ppos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	unsigned int minor = iminor(file_inode(file));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	struct pp_struct *pp = file->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	char *kbuffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	ssize_t bytes_written = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 	ssize_t wrote;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	int mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	struct parport *pport;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	if (!(pp->flags & PP_CLAIMED)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 		/* Don't have the port claimed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 		pr_debug(CHRDEV "%x: claim the port first\n", minor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	kbuffer = kmalloc(min_t(size_t, count, PP_BUFFER_SIZE), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	if (!kbuffer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	pport = pp->pdev->port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	mode = pport->ieee1284.mode & ~(IEEE1284_DEVICEID | IEEE1284_ADDR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	parport_set_timeout(pp->pdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 			    (file->f_flags & O_NONBLOCK) ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 			    PARPORT_INACTIVITY_O_NONBLOCK :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 			    pp->default_inactivity);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	while (bytes_written < count) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 		ssize_t n = min_t(unsigned long, count - bytes_written, PP_BUFFER_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 		if (copy_from_user(kbuffer, buf + bytes_written, n)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 			bytes_written = -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 		if ((pp->flags & PP_FASTWRITE) && (mode == IEEE1284_MODE_EPP)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 			/* do a fast EPP write */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 			if (pport->ieee1284.mode & IEEE1284_ADDR) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 				wrote = pport->ops->epp_write_addr(pport,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 					kbuffer, n, PARPORT_EPP_FAST);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 			} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 				wrote = pport->ops->epp_write_data(pport,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 					kbuffer, n, PARPORT_EPP_FAST);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 		} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 			wrote = parport_write(pp->pdev->port, kbuffer, n);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 		if (wrote <= 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 			if (!bytes_written)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 				bytes_written = wrote;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 		bytes_written += wrote;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 		if (file->f_flags & O_NONBLOCK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 			if (!bytes_written)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 				bytes_written = -EAGAIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 		if (signal_pending(current))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 		cond_resched();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	parport_set_timeout(pp->pdev, pp->default_inactivity);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	kfree(kbuffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 	pp_enable_irq(pp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 	return bytes_written;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) static void pp_irq(void *private)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 	struct pp_struct *pp = private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 	if (pp->irqresponse) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 		parport_write_control(pp->pdev->port, pp->irqctl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 		pp->irqresponse = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 	atomic_inc(&pp->irqc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 	wake_up_interruptible(&pp->irq_wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) static int register_device(int minor, struct pp_struct *pp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 	struct parport *port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 	struct pardevice *pdev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 	char *name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 	struct pardev_cb ppdev_cb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 	int rc = 0, index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 	name = kasprintf(GFP_KERNEL, CHRDEV "%x", minor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 	if (name == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 	port = parport_find_number(minor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 	if (!port) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 		pr_warn("%s: no associated port!\n", name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 		rc = -ENXIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 		goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 	index = ida_simple_get(&ida_index, 0, 0, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 	memset(&ppdev_cb, 0, sizeof(ppdev_cb));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 	ppdev_cb.irq_func = pp_irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 	ppdev_cb.flags = (pp->flags & PP_EXCL) ? PARPORT_FLAG_EXCL : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 	ppdev_cb.private = pp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 	pdev = parport_register_dev_model(port, name, &ppdev_cb, index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 	parport_put_port(port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 	if (!pdev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 		pr_warn("%s: failed to register device!\n", name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 		rc = -ENXIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 		ida_simple_remove(&ida_index, index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 		goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 	pp->pdev = pdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 	pp->index = index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 	dev_dbg(&pdev->dev, "registered pardevice\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 	kfree(name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 	return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) static enum ieee1284_phase init_phase(int mode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 	switch (mode & ~(IEEE1284_DEVICEID
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 			 | IEEE1284_ADDR)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 	case IEEE1284_MODE_NIBBLE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 	case IEEE1284_MODE_BYTE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 		return IEEE1284_PH_REV_IDLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 	return IEEE1284_PH_FWD_IDLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) static int pp_set_timeout(struct pardevice *pdev, long tv_sec, int tv_usec)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 	long to_jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 	if ((tv_sec < 0) || (tv_usec < 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 	to_jiffies = usecs_to_jiffies(tv_usec);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 	to_jiffies += tv_sec * HZ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 	if (to_jiffies <= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 	pdev->timeout = to_jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) static int pp_do_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) 	unsigned int minor = iminor(file_inode(file));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) 	struct pp_struct *pp = file->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) 	struct parport *port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) 	void __user *argp = (void __user *)arg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) 	struct ieee1284_info *info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) 	unsigned char reg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) 	unsigned char mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) 	int mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) 	s32 time32[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) 	s64 time64[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) 	struct timespec64 ts;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) 	/* First handle the cases that don't take arguments. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) 	switch (cmd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) 	case PPCLAIM:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) 	    {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) 		if (pp->flags & PP_CLAIMED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) 			dev_dbg(&pp->pdev->dev, "you've already got it!\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) 			return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) 		/* Deferred device registration. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) 		if (!pp->pdev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) 			int err = register_device(minor, pp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) 			if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) 				return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) 		ret = parport_claim_or_block(pp->pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) 		if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) 			return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) 		pp->flags |= PP_CLAIMED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) 		/* For interrupt-reporting to work, we need to be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) 		 * informed of each interrupt. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) 		pp_enable_irq(pp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) 		/* We may need to fix up the state machine. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) 		info = &pp->pdev->port->ieee1284;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) 		pp->saved_state.mode = info->mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) 		pp->saved_state.phase = info->phase;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) 		info->mode = pp->state.mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) 		info->phase = pp->state.phase;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) 		pp->default_inactivity = parport_set_timeout(pp->pdev, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) 		parport_set_timeout(pp->pdev, pp->default_inactivity);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) 	    }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) 	case PPEXCL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) 		if (pp->pdev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) 			dev_dbg(&pp->pdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) 				"too late for PPEXCL; already registered\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) 			if (pp->flags & PP_EXCL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) 				/* But it's not really an error. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) 				return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) 			/* There's no chance of making the driver happy. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) 			return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) 		/* Just remember to register the device exclusively
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) 		 * when we finally do the registration. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) 		pp->flags |= PP_EXCL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) 	case PPSETMODE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) 	    {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) 		int mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) 		if (copy_from_user(&mode, argp, sizeof(mode)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) 			return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) 		/* FIXME: validate mode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) 		pp->state.mode = mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) 		pp->state.phase = init_phase(mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) 		if (pp->flags & PP_CLAIMED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) 			pp->pdev->port->ieee1284.mode = mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) 			pp->pdev->port->ieee1284.phase = pp->state.phase;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) 	    }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) 	case PPGETMODE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) 	    {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) 		int mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) 		if (pp->flags & PP_CLAIMED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) 			mode = pp->pdev->port->ieee1284.mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) 		else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) 			mode = pp->state.mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) 		if (copy_to_user(argp, &mode, sizeof(mode)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) 			return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) 	    }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) 	case PPSETPHASE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) 	    {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) 		int phase;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) 		if (copy_from_user(&phase, argp, sizeof(phase)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) 			return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) 		/* FIXME: validate phase */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) 		pp->state.phase = phase;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) 		if (pp->flags & PP_CLAIMED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) 			pp->pdev->port->ieee1284.phase = phase;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) 	    }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) 	case PPGETPHASE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) 	    {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) 		int phase;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) 		if (pp->flags & PP_CLAIMED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) 			phase = pp->pdev->port->ieee1284.phase;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) 		else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) 			phase = pp->state.phase;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) 		if (copy_to_user(argp, &phase, sizeof(phase)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) 			return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) 	    }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) 	case PPGETMODES:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) 	    {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) 		unsigned int modes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) 		port = parport_find_number(minor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) 		if (!port)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) 			return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) 		modes = port->modes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) 		parport_put_port(port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) 		if (copy_to_user(argp, &modes, sizeof(modes)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) 			return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) 	    }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) 	case PPSETFLAGS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) 	    {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) 		int uflags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) 		if (copy_from_user(&uflags, argp, sizeof(uflags)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) 			return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) 		pp->flags &= ~PP_FLAGMASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) 		pp->flags |= (uflags & PP_FLAGMASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) 	    }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) 	case PPGETFLAGS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) 	    {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) 		int uflags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) 		uflags = pp->flags & PP_FLAGMASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) 		if (copy_to_user(argp, &uflags, sizeof(uflags)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) 			return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) 	    }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) 	}	/* end switch() */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) 	/* Everything else requires the port to be claimed, so check
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) 	 * that now. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) 	if ((pp->flags & PP_CLAIMED) == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) 		pr_debug(CHRDEV "%x: claim the port first\n", minor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) 	port = pp->pdev->port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) 	switch (cmd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) 	case PPRSTATUS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) 		reg = parport_read_status(port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) 		if (copy_to_user(argp, &reg, sizeof(reg)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) 			return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) 	case PPRDATA:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) 		reg = parport_read_data(port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) 		if (copy_to_user(argp, &reg, sizeof(reg)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) 			return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) 	case PPRCONTROL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) 		reg = parport_read_control(port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) 		if (copy_to_user(argp, &reg, sizeof(reg)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) 			return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) 	case PPYIELD:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) 		parport_yield_blocking(pp->pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) 	case PPRELEASE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) 		/* Save the state machine's state. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) 		info = &pp->pdev->port->ieee1284;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) 		pp->state.mode = info->mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) 		pp->state.phase = info->phase;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) 		info->mode = pp->saved_state.mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) 		info->phase = pp->saved_state.phase;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) 		parport_release(pp->pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) 		pp->flags &= ~PP_CLAIMED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) 	case PPWCONTROL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) 		if (copy_from_user(&reg, argp, sizeof(reg)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) 			return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) 		parport_write_control(port, reg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) 	case PPWDATA:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) 		if (copy_from_user(&reg, argp, sizeof(reg)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) 			return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) 		parport_write_data(port, reg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) 	case PPFCONTROL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) 		if (copy_from_user(&mask, argp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) 				   sizeof(mask)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) 			return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) 		if (copy_from_user(&reg, 1 + (unsigned char __user *) arg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) 				   sizeof(reg)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) 			return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) 		parport_frob_control(port, mask, reg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) 	case PPDATADIR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) 		if (copy_from_user(&mode, argp, sizeof(mode)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) 			return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) 		if (mode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) 			port->ops->data_reverse(port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) 		else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) 			port->ops->data_forward(port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) 	case PPNEGOT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) 		if (copy_from_user(&mode, argp, sizeof(mode)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) 			return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) 		switch ((ret = parport_negotiate(port, mode))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) 		case 0: break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) 		case -1: /* handshake failed, peripheral not IEEE 1284 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) 			ret = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) 		case 1:  /* handshake succeeded, peripheral rejected mode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) 			ret = -ENXIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) 		pp_enable_irq(pp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) 	case PPWCTLONIRQ:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) 		if (copy_from_user(&reg, argp, sizeof(reg)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) 			return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) 		/* Remember what to set the control lines to, for next
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) 		 * time we get an interrupt. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) 		pp->irqctl = reg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) 		pp->irqresponse = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) 	case PPCLRIRQ:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) 		ret = atomic_read(&pp->irqc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) 		if (copy_to_user(argp, &ret, sizeof(ret)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) 			return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) 		atomic_sub(ret, &pp->irqc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) 	case PPSETTIME32:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) 		if (copy_from_user(time32, argp, sizeof(time32)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) 			return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) 		if ((time32[0] < 0) || (time32[1] < 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) 			return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) 		return pp_set_timeout(pp->pdev, time32[0], time32[1]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) 	case PPSETTIME64:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) 		if (copy_from_user(time64, argp, sizeof(time64)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) 			return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) 		if ((time64[0] < 0) || (time64[1] < 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) 			return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) 		if (IS_ENABLED(CONFIG_SPARC64) && !in_compat_syscall())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) 			time64[1] >>= 32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) 		return pp_set_timeout(pp->pdev, time64[0], time64[1]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) 	case PPGETTIME32:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) 		jiffies_to_timespec64(pp->pdev->timeout, &ts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) 		time32[0] = ts.tv_sec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) 		time32[1] = ts.tv_nsec / NSEC_PER_USEC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) 		if (copy_to_user(argp, time32, sizeof(time32)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) 			return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) 	case PPGETTIME64:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) 		jiffies_to_timespec64(pp->pdev->timeout, &ts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) 		time64[0] = ts.tv_sec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) 		time64[1] = ts.tv_nsec / NSEC_PER_USEC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) 		if (IS_ENABLED(CONFIG_SPARC64) && !in_compat_syscall())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) 			time64[1] <<= 32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) 		if (copy_to_user(argp, time64, sizeof(time64)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) 			return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) 		dev_dbg(&pp->pdev->dev, "What? (cmd=0x%x)\n", cmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) 	/* Keep the compiler happy */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) static long pp_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) 	long ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) 	mutex_lock(&pp_do_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) 	ret = pp_do_ioctl(file, cmd, arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) 	mutex_unlock(&pp_do_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) static int pp_open(struct inode *inode, struct file *file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) 	unsigned int minor = iminor(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) 	struct pp_struct *pp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) 	if (minor >= PARPORT_MAX)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) 		return -ENXIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) 	pp = kmalloc(sizeof(struct pp_struct), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) 	if (!pp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) 	pp->state.mode = IEEE1284_MODE_COMPAT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) 	pp->state.phase = init_phase(pp->state.mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) 	pp->flags = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) 	pp->irqresponse = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) 	atomic_set(&pp->irqc, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) 	init_waitqueue_head(&pp->irq_wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) 	/* Defer the actual device registration until the first claim.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) 	 * That way, we know whether or not the driver wants to have
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) 	 * exclusive access to the port (PPEXCL).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) 	pp->pdev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) 	file->private_data = pp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) static int pp_release(struct inode *inode, struct file *file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) 	unsigned int minor = iminor(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) 	struct pp_struct *pp = file->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) 	int compat_negot;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) 	compat_negot = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) 	if (!(pp->flags & PP_CLAIMED) && pp->pdev &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) 	    (pp->state.mode != IEEE1284_MODE_COMPAT)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) 		struct ieee1284_info *info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) 		/* parport released, but not in compatibility mode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) 		parport_claim_or_block(pp->pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) 		pp->flags |= PP_CLAIMED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) 		info = &pp->pdev->port->ieee1284;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) 		pp->saved_state.mode = info->mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) 		pp->saved_state.phase = info->phase;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) 		info->mode = pp->state.mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) 		info->phase = pp->state.phase;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) 		compat_negot = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) 	} else if ((pp->flags & PP_CLAIMED) && pp->pdev &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) 	    (pp->pdev->port->ieee1284.mode != IEEE1284_MODE_COMPAT)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) 		compat_negot = 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) 	if (compat_negot) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) 		parport_negotiate(pp->pdev->port, IEEE1284_MODE_COMPAT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) 		dev_dbg(&pp->pdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) 			"negotiated back to compatibility mode because user-space forgot\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) 	if ((pp->flags & PP_CLAIMED) && pp->pdev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) 		struct ieee1284_info *info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) 		info = &pp->pdev->port->ieee1284;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) 		pp->state.mode = info->mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) 		pp->state.phase = info->phase;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) 		info->mode = pp->saved_state.mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) 		info->phase = pp->saved_state.phase;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) 		parport_release(pp->pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) 		if (compat_negot != 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) 			pr_debug(CHRDEV "%x: released pardevice "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) 				"because user-space forgot\n", minor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) 	if (pp->pdev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) 		parport_unregister_device(pp->pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) 		ida_simple_remove(&ida_index, pp->index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) 		pp->pdev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) 		pr_debug(CHRDEV "%x: unregistered pardevice\n", minor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) 	kfree(pp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) /* No kernel lock held - fine */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) static __poll_t pp_poll(struct file *file, poll_table *wait)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) 	struct pp_struct *pp = file->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) 	__poll_t mask = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) 	poll_wait(file, &pp->irq_wait, wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) 	if (atomic_read(&pp->irqc))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) 		mask |= EPOLLIN | EPOLLRDNORM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) 	return mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) static struct class *ppdev_class;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) static const struct file_operations pp_fops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) 	.owner		= THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) 	.llseek		= no_llseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) 	.read		= pp_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) 	.write		= pp_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) 	.poll		= pp_poll,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) 	.unlocked_ioctl	= pp_ioctl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) 	.compat_ioctl   = compat_ptr_ioctl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) 	.open		= pp_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) 	.release	= pp_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) static void pp_attach(struct parport *port)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) 	struct device *ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) 	if (devices[port->number])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) 	ret = device_create(ppdev_class, port->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) 			    MKDEV(PP_MAJOR, port->number), NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) 			    "parport%d", port->number);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) 	if (IS_ERR(ret)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801) 		pr_err("Failed to create device parport%d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) 		       port->number);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) 	devices[port->number] = ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) static void pp_detach(struct parport *port)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) 	if (!devices[port->number])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) 	device_destroy(ppdev_class, MKDEV(PP_MAJOR, port->number));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) 	devices[port->number] = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) static int pp_probe(struct pardevice *par_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) 	struct device_driver *drv = par_dev->dev.driver;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820) 	int len = strlen(drv->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) 	if (strncmp(par_dev->name, drv->name, len))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) 		return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) static struct parport_driver pp_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) 	.name		= CHRDEV,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830) 	.probe		= pp_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) 	.match_port	= pp_attach,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) 	.detach		= pp_detach,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833) 	.devmodel	= true,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) static int __init ppdev_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) 	int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) 	if (register_chrdev(PP_MAJOR, CHRDEV, &pp_fops)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841) 		pr_warn(CHRDEV ": unable to get major %d\n", PP_MAJOR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) 		return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) 	ppdev_class = class_create(THIS_MODULE, CHRDEV);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) 	if (IS_ERR(ppdev_class)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846) 		err = PTR_ERR(ppdev_class);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) 		goto out_chrdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) 	err = parport_register_driver(&pp_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) 	if (err < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851) 		pr_warn(CHRDEV ": unable to register with parport\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) 		goto out_class;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) 	pr_info(PP_VERSION "\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856) 	goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858) out_class:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) 	class_destroy(ppdev_class);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) out_chrdev:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) 	unregister_chrdev(PP_MAJOR, CHRDEV);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) static void __exit ppdev_cleanup(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) 	/* Clean up all parport stuff */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) 	parport_unregister_driver(&pp_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870) 	class_destroy(ppdev_class);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) 	unregister_chrdev(PP_MAJOR, CHRDEV);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874) module_init(ppdev_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) module_exit(ppdev_cleanup);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878) MODULE_ALIAS_CHARDEV_MAJOR(PP_MAJOR);