^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Generic parallel printer driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 1992 by Jim Weigand and Linus Torvalds
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (C) 1992,1993 by Michael K. Johnson
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * - Thanks much to Gunter Windau for pointing out to me where the error
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * checking ought to be.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * Copyright (C) 1993 by Nigel Gamble (added interrupt code)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * Copyright (C) 1994 by Alan Cox (Modularised it)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * LPCAREFUL, LPABORT, LPGETSTATUS added by Chris Metcalf, metcalf@lcs.mit.edu
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * Statistics and support for slow printers by Rob Janssen, rob@knoware.nl
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * "lp=" command line parameters added by Grant Guenther, grant@torque.net
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * lp_read (Status readback) support added by Carsten Gross,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) * carsten@sol.wohnheim.uni-ulm.de
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) * Support for parport by Philip Blundell <philb@gnu.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) * Parport sharing hacking by Andrea Arcangeli
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * Fixed kernel_(to/from)_user memory copy to check for errors
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) * by Riccardo Facchetti <fizban@tin.it>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) * 22-JAN-1998 Added support for devfs Richard Gooch <rgooch@atnf.csiro.au>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) * Redesigned interrupt handling for handle printers with buggy handshake
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) * by Andrea Arcangeli, 11 May 1998
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) * Full efficient handling of printer with buggy irq handshake (now I have
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) * understood the meaning of the strange handshake). This is done sending new
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) * characters if the interrupt is just happened, even if the printer say to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) * be still BUSY. This is needed at least with Epson Stylus Color. To enable
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) * the new TRUST_IRQ mode read the `LP OPTIMIZATION' section below...
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) * Fixed the irq on the rising edge of the strobe case.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) * Obsoleted the CAREFUL flag since a printer that doesn' t work with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) * CAREFUL will block a bit after in lp_check_status().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) * Andrea Arcangeli, 15 Oct 1998
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) * Obsoleted and removed all the lowlevel stuff implemented in the last
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) * month to use the IEEE1284 functions (that handle the _new_ compatibilty
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) * mode fine).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) /* This driver should, in theory, work with any parallel port that has an
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) * appropriate low-level driver; all I/O is done through the parport
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) * abstraction layer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) * If this driver is built into the kernel, you can configure it using the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) * kernel command-line. For example:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) * lp=parport1,none,parport2 (bind lp0 to parport1, disable lp1 and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) * bind lp2 to parport2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) * lp=auto (assign lp devices to all ports that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) * have printers attached, as determined
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) * by the IEEE-1284 autoprobe)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) * lp=reset (reset the printer during
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) * initialisation)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) * lp=off (disable the printer driver entirely)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) * If the driver is loaded as a module, similar functionality is available
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) * using module parameters. The equivalent of the above commands would be:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) * # insmod lp.o parport=1,none,2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) * # insmod lp.o parport=auto
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) * # insmod lp.o reset=1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) /* COMPATIBILITY WITH OLD KERNELS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) * Under Linux 2.0 and previous versions, lp devices were bound to ports at
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) * particular I/O addresses, as follows:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) * lp0 0x3bc
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) * lp1 0x378
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) * lp2 0x278
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) * The new driver, by default, binds lp devices to parport devices as it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) * finds them. This means that if you only have one port, it will be bound
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) * to lp0 regardless of its I/O address. If you need the old behaviour, you
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) * can force it using the parameters described above.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) * The new interrupt handling code take care of the buggy handshake
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) * of some HP and Epson printer:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) * ___
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) * ACK _______________ ___________
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) * |__|
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) * ____
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) * BUSY _________ _______
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) * |____________|
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) * I discovered this using the printer scanner that you can find at:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) * ftp://e-mind.com/pub/linux/pscan/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) * 11 May 98, Andrea Arcangeli
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) * My printer scanner run on an Epson Stylus Color show that such printer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) * generates the irq on the _rising_ edge of the STROBE. Now lp handle
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) * this case fine too.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) * 15 Oct 1998, Andrea Arcangeli
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) * The so called `buggy' handshake is really the well documented
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) * compatibility mode IEEE1284 handshake. They changed the well known
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) * Centronics handshake acking in the middle of busy expecting to not
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) * break drivers or legacy application, while they broken linux lp
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) * until I fixed it reverse engineering the protocol by hand some
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) * month ago...
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) * 14 Dec 1998, Andrea Arcangeli
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) * Copyright (C) 2000 by Tim Waugh (added LPSETTIMEOUT ioctl)
^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) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) #include <linux/major.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) #include <linux/sched/signal.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) #include <linux/fcntl.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) #include <linux/poll.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) #include <linux/console.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) #include <linux/device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) #include <linux/wait.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) #include <linux/jiffies.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) #include <linux/mutex.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) #include <linux/compat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) #include <linux/parport.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) #undef LP_STATS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) #include <linux/lp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) #include <asm/irq.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) /* if you have more than 8 printers, remember to increase LP_NO */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) #define LP_NO 8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) static DEFINE_MUTEX(lp_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) static struct lp_struct lp_table[LP_NO];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) static int port_num[LP_NO];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) static unsigned int lp_count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) static struct class *lp_class;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) #ifdef CONFIG_LP_CONSOLE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) static struct parport *console_registered;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) #endif /* CONFIG_LP_CONSOLE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) #undef LP_DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) /* Bits used to manage claiming the parport device */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) #define LP_PREEMPT_REQUEST 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) #define LP_PARPORT_CLAIMED 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) /* --- low-level port access ----------------------------------- */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) #define r_dtr(x) (parport_read_data(lp_table[(x)].dev->port))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) #define r_str(x) (parport_read_status(lp_table[(x)].dev->port))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) #define w_ctr(x,y) do { parport_write_control(lp_table[(x)].dev->port, (y)); } while (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) #define w_dtr(x,y) do { parport_write_data(lp_table[(x)].dev->port, (y)); } while (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) /* Claim the parport or block trying unless we've already claimed it */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) static void lp_claim_parport_or_block(struct lp_struct *this_lp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) if (!test_and_set_bit(LP_PARPORT_CLAIMED, &this_lp->bits)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) parport_claim_or_block(this_lp->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) }
^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) /* Claim the parport or block trying unless we've already claimed it */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) static void lp_release_parport(struct lp_struct *this_lp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) if (test_and_clear_bit(LP_PARPORT_CLAIMED, &this_lp->bits)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) parport_release(this_lp->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) }
^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)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) static int lp_preempt(void *handle)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) struct lp_struct *this_lp = (struct lp_struct *)handle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) set_bit(LP_PREEMPT_REQUEST, &this_lp->bits);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) }
^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) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) * Try to negotiate to a new mode; if unsuccessful negotiate to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) * compatibility mode. Return the mode we ended up in.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) static int lp_negotiate(struct parport *port, int mode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) if (parport_negotiate(port, mode) != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) mode = IEEE1284_MODE_COMPAT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) parport_negotiate(port, mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) return mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) static int lp_reset(int minor)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) int retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) lp_claim_parport_or_block(&lp_table[minor]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) w_ctr(minor, LP_PSELECP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) udelay(LP_DELAY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) w_ctr(minor, LP_PSELECP | LP_PINITP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) retval = r_str(minor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) lp_release_parport(&lp_table[minor]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) static void lp_error(int minor)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) DEFINE_WAIT(wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) int polling;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) if (LP_F(minor) & LP_ABORT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) polling = lp_table[minor].dev->port->irq == PARPORT_IRQ_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) if (polling)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) lp_release_parport(&lp_table[minor]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) prepare_to_wait(&lp_table[minor].waitq, &wait, TASK_INTERRUPTIBLE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) schedule_timeout(LP_TIMEOUT_POLLED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) finish_wait(&lp_table[minor].waitq, &wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) if (polling)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) lp_claim_parport_or_block(&lp_table[minor]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) parport_yield_blocking(lp_table[minor].dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) static int lp_check_status(int minor)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) int error = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) unsigned int last = lp_table[minor].last_error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) unsigned char status = r_str(minor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) if ((status & LP_PERRORP) && !(LP_F(minor) & LP_CAREFUL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) /* No error. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) last = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) else if ((status & LP_POUTPA)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) if (last != LP_POUTPA) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) last = LP_POUTPA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) printk(KERN_INFO "lp%d out of paper\n", minor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) error = -ENOSPC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) } else if (!(status & LP_PSELECD)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) if (last != LP_PSELECD) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) last = LP_PSELECD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) printk(KERN_INFO "lp%d off-line\n", minor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) error = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) } else if (!(status & LP_PERRORP)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) if (last != LP_PERRORP) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) last = LP_PERRORP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) printk(KERN_INFO "lp%d on fire\n", minor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) error = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) last = 0; /* Come here if LP_CAREFUL is set and no
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) errors are reported. */
^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) lp_table[minor].last_error = last;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) if (last != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) lp_error(minor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) static int lp_wait_ready(int minor, int nonblock)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) int error = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) /* If we're not in compatibility mode, we're ready now! */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) if (lp_table[minor].current_mode != IEEE1284_MODE_COMPAT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) error = lp_check_status(minor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) if (error && (nonblock || (LP_F(minor) & LP_ABORT)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) if (signal_pending(current)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) error = -EINTR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) } while (error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) static ssize_t lp_write(struct file *file, const char __user *buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) size_t count, loff_t *ppos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) unsigned int minor = iminor(file_inode(file));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) struct parport *port = lp_table[minor].dev->port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) char *kbuf = lp_table[minor].lp_buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) ssize_t retv = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) ssize_t written;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) size_t copy_size = count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) int nonblock = ((file->f_flags & O_NONBLOCK) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) (LP_F(minor) & LP_ABORT));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) #ifdef LP_STATS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) if (time_after(jiffies, lp_table[minor].lastcall + LP_TIME(minor)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) lp_table[minor].runchars = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) lp_table[minor].lastcall = jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) /* Need to copy the data from user-space. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) if (copy_size > LP_BUFFER_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) copy_size = LP_BUFFER_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) if (mutex_lock_interruptible(&lp_table[minor].port_mutex))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) return -EINTR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) if (copy_from_user(kbuf, buf, copy_size)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) retv = -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) goto out_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) /* Claim Parport or sleep until it becomes available
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) lp_claim_parport_or_block(&lp_table[minor]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) /* Go to the proper mode. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) lp_table[minor].current_mode = lp_negotiate(port,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) lp_table[minor].best_mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) parport_set_timeout(lp_table[minor].dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) (nonblock ? PARPORT_INACTIVITY_O_NONBLOCK
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) : lp_table[minor].timeout));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) if ((retv = lp_wait_ready(minor, nonblock)) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) /* Write the data. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) written = parport_write(port, kbuf, copy_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) if (written > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) copy_size -= written;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) count -= written;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) buf += written;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) retv += written;
^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) if (signal_pending(current)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) if (retv == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) retv = -EINTR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) if (copy_size > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) /* incomplete write -> check error ! */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) parport_negotiate(lp_table[minor].dev->port,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) IEEE1284_MODE_COMPAT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) lp_table[minor].current_mode = IEEE1284_MODE_COMPAT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) error = lp_wait_ready(minor, nonblock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) if (retv == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) retv = error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) } else if (nonblock) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) if (retv == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) retv = -EAGAIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) parport_yield_blocking(lp_table[minor].dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) lp_table[minor].current_mode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) = lp_negotiate(port,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) lp_table[minor].best_mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) } else if (need_resched())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) schedule();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) if (count) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) copy_size = count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) if (copy_size > LP_BUFFER_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) copy_size = LP_BUFFER_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) if (copy_from_user(kbuf, buf, copy_size)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) if (retv == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) retv = -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) } while (count > 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) if (test_and_clear_bit(LP_PREEMPT_REQUEST,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) &lp_table[minor].bits)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) printk(KERN_INFO "lp%d releasing parport\n", minor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) parport_negotiate(lp_table[minor].dev->port,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) IEEE1284_MODE_COMPAT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) lp_table[minor].current_mode = IEEE1284_MODE_COMPAT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) lp_release_parport(&lp_table[minor]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) out_unlock:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) mutex_unlock(&lp_table[minor].port_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) return retv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) #ifdef CONFIG_PARPORT_1284
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) /* Status readback conforming to ieee1284 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) static ssize_t lp_read(struct file *file, char __user *buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) size_t count, loff_t *ppos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) DEFINE_WAIT(wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) unsigned int minor=iminor(file_inode(file));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) struct parport *port = lp_table[minor].dev->port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) ssize_t retval = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) char *kbuf = lp_table[minor].lp_buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) int nonblock = ((file->f_flags & O_NONBLOCK) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) (LP_F(minor) & LP_ABORT));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) if (count > LP_BUFFER_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) count = LP_BUFFER_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) if (mutex_lock_interruptible(&lp_table[minor].port_mutex))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) return -EINTR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) lp_claim_parport_or_block(&lp_table[minor]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) parport_set_timeout(lp_table[minor].dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) (nonblock ? PARPORT_INACTIVITY_O_NONBLOCK
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) : lp_table[minor].timeout));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) parport_negotiate(lp_table[minor].dev->port, IEEE1284_MODE_COMPAT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) if (parport_negotiate(lp_table[minor].dev->port,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) IEEE1284_MODE_NIBBLE)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) retval = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) while (retval == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) retval = parport_read(port, kbuf, count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) if (retval > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) if (nonblock) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) retval = -EAGAIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) /* Wait for data. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) if (lp_table[minor].dev->port->irq == PARPORT_IRQ_NONE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) parport_negotiate(lp_table[minor].dev->port,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) IEEE1284_MODE_COMPAT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) lp_error(minor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) if (parport_negotiate(lp_table[minor].dev->port,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) IEEE1284_MODE_NIBBLE)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) retval = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) prepare_to_wait(&lp_table[minor].waitq, &wait, TASK_INTERRUPTIBLE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) schedule_timeout(LP_TIMEOUT_POLLED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) finish_wait(&lp_table[minor].waitq, &wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) if (signal_pending(current)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) retval = -ERESTARTSYS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) cond_resched();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) parport_negotiate(lp_table[minor].dev->port, IEEE1284_MODE_COMPAT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) lp_release_parport(&lp_table[minor]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) if (retval > 0 && copy_to_user(buf, kbuf, retval))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) retval = -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) mutex_unlock(&lp_table[minor].port_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) #endif /* IEEE 1284 support */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) static int lp_open(struct inode *inode, struct file *file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) unsigned int minor = iminor(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) mutex_lock(&lp_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) if (minor >= LP_NO) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) ret = -ENXIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) if ((LP_F(minor) & LP_EXIST) == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) ret = -ENXIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) if (test_and_set_bit(LP_BUSY_BIT_POS, &LP_F(minor))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) ret = -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) /* If ABORTOPEN is set and the printer is offline or out of paper,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) we may still want to open it to perform ioctl()s. Therefore we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) have commandeered O_NONBLOCK, even though it is being used in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) a non-standard manner. This is strictly a Linux hack, and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) should most likely only ever be used by the tunelp application. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) if ((LP_F(minor) & LP_ABORTOPEN) && !(file->f_flags & O_NONBLOCK)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) int status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) lp_claim_parport_or_block(&lp_table[minor]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) status = r_str(minor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) lp_release_parport(&lp_table[minor]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) if (status & LP_POUTPA) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) printk(KERN_INFO "lp%d out of paper\n", minor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) LP_F(minor) &= ~LP_BUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) ret = -ENOSPC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) } else if (!(status & LP_PSELECD)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) printk(KERN_INFO "lp%d off-line\n", minor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) LP_F(minor) &= ~LP_BUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) ret = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) } else if (!(status & LP_PERRORP)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) printk(KERN_ERR "lp%d printer error\n", minor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) LP_F(minor) &= ~LP_BUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) ret = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) lp_table[minor].lp_buffer = kmalloc(LP_BUFFER_SIZE, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) if (!lp_table[minor].lp_buffer) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) LP_F(minor) &= ~LP_BUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) /* Determine if the peripheral supports ECP mode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) lp_claim_parport_or_block(&lp_table[minor]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) if ( (lp_table[minor].dev->port->modes & PARPORT_MODE_ECP) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) !parport_negotiate(lp_table[minor].dev->port,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) IEEE1284_MODE_ECP)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) printk(KERN_INFO "lp%d: ECP mode\n", minor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) lp_table[minor].best_mode = IEEE1284_MODE_ECP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) lp_table[minor].best_mode = IEEE1284_MODE_COMPAT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) /* Leave peripheral in compatibility mode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) parport_negotiate(lp_table[minor].dev->port, IEEE1284_MODE_COMPAT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) lp_release_parport(&lp_table[minor]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) lp_table[minor].current_mode = IEEE1284_MODE_COMPAT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) mutex_unlock(&lp_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) static int lp_release(struct inode *inode, struct file *file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) unsigned int minor = iminor(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) lp_claim_parport_or_block(&lp_table[minor]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) parport_negotiate(lp_table[minor].dev->port, IEEE1284_MODE_COMPAT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) lp_table[minor].current_mode = IEEE1284_MODE_COMPAT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) lp_release_parport(&lp_table[minor]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) kfree(lp_table[minor].lp_buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) lp_table[minor].lp_buffer = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) LP_F(minor) &= ~LP_BUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) static int lp_do_ioctl(unsigned int minor, unsigned int cmd,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) unsigned long arg, void __user *argp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) int status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) int retval = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) #ifdef LP_DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) printk(KERN_DEBUG "lp%d ioctl, cmd: 0x%x, arg: 0x%lx\n", minor, cmd, arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) if (minor >= LP_NO)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) if ((LP_F(minor) & LP_EXIST) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) switch ( cmd ) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) case LPTIME:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) if (arg > UINT_MAX / HZ)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) LP_TIME(minor) = arg * HZ/100;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) case LPCHAR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) LP_CHAR(minor) = arg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) case LPABORT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) if (arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) LP_F(minor) |= LP_ABORT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) LP_F(minor) &= ~LP_ABORT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) case LPABORTOPEN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) if (arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) LP_F(minor) |= LP_ABORTOPEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) LP_F(minor) &= ~LP_ABORTOPEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) case LPCAREFUL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) if (arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) LP_F(minor) |= LP_CAREFUL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) LP_F(minor) &= ~LP_CAREFUL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) case LPWAIT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) LP_WAIT(minor) = arg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) case LPSETIRQ:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) case LPGETIRQ:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) if (copy_to_user(argp, &LP_IRQ(minor),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) sizeof(int)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) case LPGETSTATUS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) if (mutex_lock_interruptible(&lp_table[minor].port_mutex))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) return -EINTR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) lp_claim_parport_or_block(&lp_table[minor]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) status = r_str(minor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) lp_release_parport(&lp_table[minor]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) mutex_unlock(&lp_table[minor].port_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) if (copy_to_user(argp, &status, sizeof(int)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) case LPRESET:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) lp_reset(minor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) #ifdef LP_STATS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) case LPGETSTATS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) if (copy_to_user(argp, &LP_STAT(minor),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) sizeof(struct lp_stats)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) if (capable(CAP_SYS_ADMIN))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) memset(&LP_STAT(minor), 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) sizeof(struct lp_stats));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) case LPGETFLAGS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) status = LP_F(minor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) if (copy_to_user(argp, &status, sizeof(int)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) retval = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) return retval;
^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 int lp_set_timeout(unsigned int minor, s64 tv_sec, long tv_usec)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) long to_jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) /* Convert to jiffies, place in lp_table */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) if (tv_sec < 0 || tv_usec < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) * we used to not check, so let's not make this fatal,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) * but deal with user space passing a 32-bit tv_nsec in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) * a 64-bit field, capping the timeout to 1 second
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) * worth of microseconds, and capping the total at
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) * MAX_JIFFY_OFFSET.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) if (tv_usec > 999999)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) tv_usec = 999999;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) if (tv_sec >= MAX_SEC_IN_JIFFIES - 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) to_jiffies = MAX_JIFFY_OFFSET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) to_jiffies = DIV_ROUND_UP(tv_usec, 1000000/HZ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) to_jiffies += tv_sec * (long) HZ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) if (to_jiffies <= 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) lp_table[minor].timeout = to_jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) static int lp_set_timeout32(unsigned int minor, void __user *arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) s32 karg[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) if (copy_from_user(karg, arg, sizeof(karg)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) return lp_set_timeout(minor, karg[0], karg[1]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) static int lp_set_timeout64(unsigned int minor, void __user *arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) s64 karg[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) if (copy_from_user(karg, arg, sizeof(karg)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) /* sparc64 suseconds_t is 32-bit only */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) if (IS_ENABLED(CONFIG_SPARC64) && !in_compat_syscall())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) karg[1] >>= 32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) return lp_set_timeout(minor, karg[0], karg[1]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) static long lp_ioctl(struct file *file, unsigned int cmd,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) unsigned long arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) unsigned int minor;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) minor = iminor(file_inode(file));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) mutex_lock(&lp_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) switch (cmd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) case LPSETTIMEOUT_OLD:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) if (BITS_PER_LONG == 32) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) ret = lp_set_timeout32(minor, (void __user *)arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) fallthrough; /* for 64-bit */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) case LPSETTIMEOUT_NEW:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) ret = lp_set_timeout64(minor, (void __user *)arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) ret = lp_do_ioctl(minor, cmd, arg, (void __user *)arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) mutex_unlock(&lp_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) return ret;
^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) #ifdef CONFIG_COMPAT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) static long lp_compat_ioctl(struct file *file, unsigned int cmd,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) unsigned long arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) unsigned int minor;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) minor = iminor(file_inode(file));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) mutex_lock(&lp_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) switch (cmd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) case LPSETTIMEOUT_OLD:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) if (!COMPAT_USE_64BIT_TIME) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) ret = lp_set_timeout32(minor, (void __user *)arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) fallthrough; /* for x32 mode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) case LPSETTIMEOUT_NEW:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) ret = lp_set_timeout64(minor, (void __user *)arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) #ifdef LP_STATS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) case LPGETSTATS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) /* FIXME: add an implementation if you set LP_STATS */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) ret = lp_do_ioctl(minor, cmd, arg, compat_ptr(arg));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) mutex_unlock(&lp_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) static const struct file_operations lp_fops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) .write = lp_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) .unlocked_ioctl = lp_ioctl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) #ifdef CONFIG_COMPAT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) .compat_ioctl = lp_compat_ioctl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) .open = lp_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) .release = lp_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) #ifdef CONFIG_PARPORT_1284
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) .read = lp_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) .llseek = noop_llseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) /* --- support for console on the line printer ----------------- */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) #ifdef CONFIG_LP_CONSOLE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) #define CONSOLE_LP 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) /* If the printer is out of paper, we can either lose the messages or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) * stall until the printer is happy again. Define CONSOLE_LP_STRICT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) * non-zero to get the latter behaviour. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) #define CONSOLE_LP_STRICT 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) /* The console must be locked when we get here. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) static void lp_console_write(struct console *co, const char *s,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) unsigned count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) struct pardevice *dev = lp_table[CONSOLE_LP].dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) struct parport *port = dev->port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) ssize_t written;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820) if (parport_claim(dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) /* Nothing we can do. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) parport_set_timeout(dev, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) /* Go to compatibility mode. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) parport_negotiate(port, IEEE1284_MODE_COMPAT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830) /* Write the data, converting LF->CRLF as we go. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) ssize_t canwrite = count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) char *lf = memchr(s, '\n', count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833) if (lf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) canwrite = lf - s;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) if (canwrite > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) written = parport_write(port, s, canwrite);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) if (written <= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) s += written;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) count -= written;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) canwrite -= written;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) if (lf && canwrite <= 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848) const char *crlf = "\r\n";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) int i = 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851) /* Dodge the original '\n', and put '\r\n' instead. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) s++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853) count--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) written = parport_write(port, crlf, i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856) if (written > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) i -= written;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858) crlf += written;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) } while (i > 0 && (CONSOLE_LP_STRICT || written > 0));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) } while (count > 0 && (CONSOLE_LP_STRICT || written > 0));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) parport_release(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867) static struct console lpcons = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) .name = "lp",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) .write = lp_console_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870) .flags = CON_PRINTBUFFER,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) #endif /* console on line printer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) /* --- initialisation code ------------------------------------- */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) static int parport_nr[LP_NO] = { [0 ... LP_NO-1] = LP_PARPORT_UNSPEC };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878) static char *parport[LP_NO];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879) static bool reset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881) module_param_array(parport, charp, NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882) module_param(reset, bool, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884) #ifndef MODULE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885) static int __init lp_setup(char *str)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887) static int parport_ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888) int x;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890) if (get_option(&str, &x)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891) if (x == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892) /* disable driver on "lp=" or "lp=0" */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893) parport_nr[0] = LP_PARPORT_OFF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895) printk(KERN_WARNING "warning: 'lp=0x%x' is deprecated, ignored\n", x);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898) } else if (!strncmp(str, "parport", 7)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899) int n = simple_strtoul(str+7, NULL, 10);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900) if (parport_ptr < LP_NO)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901) parport_nr[parport_ptr++] = n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903) printk(KERN_INFO "lp: too many ports, %s ignored.\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904) str);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905) } else if (!strcmp(str, "auto")) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906) parport_nr[0] = LP_PARPORT_AUTO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907) } else if (!strcmp(str, "none")) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908) if (parport_ptr < LP_NO)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909) parport_nr[parport_ptr++] = LP_PARPORT_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911) printk(KERN_INFO "lp: too many ports, %s ignored.\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912) str);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913) } else if (!strcmp(str, "reset")) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914) reset = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920) static int lp_register(int nr, struct parport *port)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922) struct pardev_cb ppdev_cb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924) memset(&ppdev_cb, 0, sizeof(ppdev_cb));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925) ppdev_cb.preempt = lp_preempt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926) ppdev_cb.private = &lp_table[nr];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927) lp_table[nr].dev = parport_register_dev_model(port, "lp",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928) &ppdev_cb, nr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929) if (lp_table[nr].dev == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931) lp_table[nr].flags |= LP_EXIST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933) if (reset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934) lp_reset(nr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936) device_create(lp_class, port->dev, MKDEV(LP_MAJOR, nr), NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937) "lp%d", nr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939) printk(KERN_INFO "lp%d: using %s (%s).\n", nr, port->name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940) (port->irq == PARPORT_IRQ_NONE)?"polling":"interrupt-driven");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942) #ifdef CONFIG_LP_CONSOLE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943) if (!nr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944) if (port->modes & PARPORT_MODE_SAFEININT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945) register_console(&lpcons);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946) console_registered = port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947) printk(KERN_INFO "lp%d: console ready\n", CONSOLE_LP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949) printk(KERN_ERR "lp%d: cannot run console on %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950) CONSOLE_LP, port->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 951) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 952) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 953) port_num[nr] = port->number;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 954)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 955) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 956) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 957)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 958) static void lp_attach(struct parport *port)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 959) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 960) unsigned int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 961)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 962) switch (parport_nr[0]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 963) case LP_PARPORT_UNSPEC:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 964) case LP_PARPORT_AUTO:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 965) if (parport_nr[0] == LP_PARPORT_AUTO &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 966) port->probe_info[0].class != PARPORT_CLASS_PRINTER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 967) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 968) if (lp_count == LP_NO) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 969) printk(KERN_INFO "lp: ignoring parallel port (max. %d)\n",LP_NO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 970) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 971) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 972) for (i = 0; i < LP_NO; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 973) if (port_num[i] == -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 974) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 975)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 976) if (!lp_register(i, port))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 977) lp_count++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 978) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 979)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 980) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 981) for (i = 0; i < LP_NO; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 982) if (port->number == parport_nr[i]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 983) if (!lp_register(i, port))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 984) lp_count++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 985) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 986) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 987) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 988) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 989) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 990) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 991)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 992) static void lp_detach(struct parport *port)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 993) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 994) int n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 995)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 996) /* Write this some day. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 997) #ifdef CONFIG_LP_CONSOLE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 998) if (console_registered == port) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 999) unregister_console(&lpcons);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1000) console_registered = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1001) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1002) #endif /* CONFIG_LP_CONSOLE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1003)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1004) for (n = 0; n < LP_NO; n++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1005) if (port_num[n] == port->number) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1006) port_num[n] = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1007) lp_count--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1008) device_destroy(lp_class, MKDEV(LP_MAJOR, n));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1009) parport_unregister_device(lp_table[n].dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1010) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1011) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1012) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1013)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1014) static struct parport_driver lp_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1015) .name = "lp",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1016) .match_port = lp_attach,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1017) .detach = lp_detach,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1018) .devmodel = true,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1019) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1020)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1021) static int __init lp_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1022) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1023) int i, err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1024)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1025) if (parport_nr[0] == LP_PARPORT_OFF)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1026) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1027)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1028) for (i = 0; i < LP_NO; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1029) lp_table[i].dev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1030) lp_table[i].flags = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1031) lp_table[i].chars = LP_INIT_CHAR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1032) lp_table[i].time = LP_INIT_TIME;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1033) lp_table[i].wait = LP_INIT_WAIT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1034) lp_table[i].lp_buffer = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1035) #ifdef LP_STATS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1036) lp_table[i].lastcall = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1037) lp_table[i].runchars = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1038) memset(&lp_table[i].stats, 0, sizeof(struct lp_stats));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1039) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1040) lp_table[i].last_error = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1041) init_waitqueue_head(&lp_table[i].waitq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1042) init_waitqueue_head(&lp_table[i].dataq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1043) mutex_init(&lp_table[i].port_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1044) lp_table[i].timeout = 10 * HZ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1045) port_num[i] = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1046) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1047)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1048) if (register_chrdev(LP_MAJOR, "lp", &lp_fops)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1049) printk(KERN_ERR "lp: unable to get major %d\n", LP_MAJOR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1050) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1051) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1052)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1053) lp_class = class_create(THIS_MODULE, "printer");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1054) if (IS_ERR(lp_class)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1055) err = PTR_ERR(lp_class);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1056) goto out_reg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1057) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1058)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1059) if (parport_register_driver(&lp_driver)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1060) printk(KERN_ERR "lp: unable to register with parport\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1061) err = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1062) goto out_class;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1063) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1064)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1065) if (!lp_count) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1066) printk(KERN_INFO "lp: driver loaded but no devices found\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1067) #ifndef CONFIG_PARPORT_1284
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1068) if (parport_nr[0] == LP_PARPORT_AUTO)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1069) printk(KERN_INFO "lp: (is IEEE 1284 support enabled?)\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1070) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1071) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1072)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1073) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1074)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1075) out_class:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1076) class_destroy(lp_class);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1077) out_reg:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1078) unregister_chrdev(LP_MAJOR, "lp");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1079) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1080) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1081)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1082) static int __init lp_init_module(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1083) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1084) if (parport[0]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1085) /* The user gave some parameters. Let's see what they were. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1086) if (!strncmp(parport[0], "auto", 4))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1087) parport_nr[0] = LP_PARPORT_AUTO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1088) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1089) int n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1090) for (n = 0; n < LP_NO && parport[n]; n++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1091) if (!strncmp(parport[n], "none", 4))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1092) parport_nr[n] = LP_PARPORT_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1093) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1094) char *ep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1095) unsigned long r = simple_strtoul(parport[n], &ep, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1096) if (ep != parport[n])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1097) parport_nr[n] = r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1098) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1099) printk(KERN_ERR "lp: bad port specifier `%s'\n", parport[n]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1100) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1101) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1102) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1103) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1104) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1105) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1107) return lp_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1108) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1110) static void lp_cleanup_module(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1111) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1112) parport_unregister_driver(&lp_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1114) #ifdef CONFIG_LP_CONSOLE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1115) unregister_console(&lpcons);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1116) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1118) unregister_chrdev(LP_MAJOR, "lp");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1119) class_destroy(lp_class);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1120) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1122) __setup("lp=", lp_setup);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1123) module_init(lp_init_module);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1124) module_exit(lp_cleanup_module);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1126) MODULE_ALIAS_CHARDEV_MAJOR(LP_MAJOR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1127) MODULE_LICENSE("GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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