// SPDX-License-Identifier: GPL-2.0-or-later/* * linux/drivers/char/ppdev.c * * This is the code behind /dev/parport* -- it allows a user-space * application to use the parport subsystem. * * Copyright (C) 1998-2000, 2002 Tim Waugh <tim@cyberelk.net> * * A /dev/parportx device node represents an arbitrary device * on port 'x'. The following operations are possible: * * open do nothing, set up default IEEE 1284 protocol to be COMPAT * close release port and unregister device (if necessary) * ioctl * EXCL register device exclusively (may fail) * CLAIM (register device first time) parport_claim_or_block * RELEASE parport_release * SETMODE set the IEEE 1284 protocol to use for read/write * SETPHASE set the IEEE 1284 phase of a particular mode. Not to be * confused with ioctl(fd, SETPHASER, &stun). ;-) * DATADIR data_forward / data_reverse * WDATA write_data * RDATA read_data * WCONTROL write_control * RCONTROL read_control * FCONTROL frob_control * RSTATUS read_status * NEGOT parport_negotiate * YIELD parport_yield_blocking * WCTLONIRQ on interrupt, set control lines * CLRIRQ clear (and return) interrupt count * SETTIME sets device timeout (struct timeval) * GETTIME gets device timeout (struct timeval) * GETMODES gets hardware supported modes (unsigned int) * GETMODE gets the current IEEE1284 mode * GETPHASE gets the current IEEE1284 phase * GETFLAGS gets current (user-visible) flags * SETFLAGS sets current (user-visible) flags * read/write read or write in current IEEE 1284 protocol * select wait for interrupt (in readfds) * * Changes: * Added SETTIME/GETTIME ioctl, Fred Barnes, 1999. * * Arnaldo Carvalho de Melo <acme@conectiva.com.br> 2000/08/25 * - On error, copy_from_user and copy_to_user do not return -EFAULT, * They return the positive number of bytes *not* copied due to address * space errors. * * Added GETMODES/GETMODE/GETPHASE ioctls, Fred Barnes <frmb2@ukc.ac.uk>, 03/01/2001. * Added GETFLAGS/SETFLAGS ioctls, Fred Barnes, 04/2001 */ #include <linux/module.h>#include <linux/init.h>#include <linux/sched/signal.h>#include <linux/device.h>#include <linux/ioctl.h>#include <linux/parport.h>#include <linux/ctype.h>#include <linux/poll.h>#include <linux/slab.h>#include <linux/major.h>#include <linux/ppdev.h>#include <linux/mutex.h>#include <linux/uaccess.h>#include <linux/compat.h> #define PP_VERSION "ppdev: user-space parallel port driver"#define CHRDEV "ppdev" struct pp_struct { struct pardevice *pdev; wait_queue_head_t irq_wait; atomic_t irqc; unsigned int flags; int irqresponse; unsigned char irqctl; struct ieee1284_info state; struct ieee1284_info saved_state; long default_inactivity; int index;}; /* should we use PARDEVICE_MAX here? */static struct device *devices[PARPORT_MAX]; static DEFINE_IDA(ida_index); /* pp_struct.flags bitfields */#define PP_CLAIMED (1<<0)#define PP_EXCL (1<<1) /* Other constants */#define PP_INTERRUPT_TIMEOUT (10 * HZ) /* 10s */#define PP_BUFFER_SIZE 1024#define PARDEVICE_MAX 8 static DEFINE_MUTEX(pp_do_mutex); /* define fixed sized ioctl cmd for y2038 migration */#define PPGETTIME32 _IOR(PP_IOCTL, 0x95, s32[2])#define PPSETTIME32 _IOW(PP_IOCTL, 0x96, s32[2])#define PPGETTIME64 _IOR(PP_IOCTL, 0x95, s64[2])#define PPSETTIME64 _IOW(PP_IOCTL, 0x96, s64[2]) static inline void pp_enable_irq(struct pp_struct *pp){ struct parport *port = pp->pdev->port; port->ops->enable_irq(port);} static ssize_t pp_read(struct file *file, char __user *buf, size_t count, loff_t *ppos){ unsigned int minor = iminor(file_inode(file)); struct pp_struct *pp = file->private_data; char *kbuffer; ssize_t bytes_read = 0; struct parport *pport; int mode; if (!(pp->flags & PP_CLAIMED)) { /* Don't have the port claimed */ pr_debug(CHRDEV "%x: claim the port first\n", minor); return -EINVAL; } /* Trivial case. */ if (count == 0) return 0; kbuffer = kmalloc(min_t(size_t, count, PP_BUFFER_SIZE), GFP_KERNEL); if (!kbuffer) return -ENOMEM; pport = pp->pdev->port; mode = pport->ieee1284.mode & ~(IEEE1284_DEVICEID | IEEE1284_ADDR); parport_set_timeout(pp->pdev, (file->f_flags & O_NONBLOCK) ? PARPORT_INACTIVITY_O_NONBLOCK : pp->default_inactivity); while (bytes_read == 0) { ssize_t need = min_t(unsigned long, count, PP_BUFFER_SIZE); if (mode == IEEE1284_MODE_EPP) { /* various specials for EPP mode */ int flags = 0; size_t (*fn)(struct parport *, void *, size_t, int); if (pp->flags & PP_W91284PIC) flags |= PARPORT_W91284PIC; if (pp->flags & PP_FASTREAD) flags |= PARPORT_EPP_FAST; if (pport->ieee1284.mode & IEEE1284_ADDR) fn = pport->ops->epp_read_addr; else fn = pport->ops->epp_read_data; bytes_read = (*fn)(pport, kbuffer, need, flags); } else { bytes_read = parport_read(pport, kbuffer, need); } if (bytes_read != 0) break; if (file->f_flags & O_NONBLOCK) { bytes_read = -EAGAIN; break; } if (signal_pending(current)) { bytes_read = -ERESTARTSYS; break; } cond_resched(); } parport_set_timeout(pp->pdev, pp->default_inactivity); if (bytes_read > 0 && copy_to_user(buf, kbuffer, bytes_read)) bytes_read = -EFAULT; kfree(kbuffer); pp_enable_irq(pp); return bytes_read;} static ssize_t pp_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos){ unsigned int minor = iminor(file_inode(file)); struct pp_struct *pp = file->private_data; char *kbuffer; ssize_t bytes_written = 0; ssize_t wrote; int mode; struct parport *pport; if (!(pp->flags & PP_CLAIMED)) { /* Don't have the port claimed */ pr_debug(CHRDEV "%x: claim the port first\n", minor); return -EINVAL; } kbuffer = kmalloc(min_t(size_t, count, PP_BUFFER_SIZE), GFP_KERNEL); if (!kbuffer) return -ENOMEM; pport = pp->pdev->port; mode = pport->ieee1284.mode & ~(IEEE1284_DEVICEID | IEEE1284_ADDR); parport_set_timeout(pp->pdev, (file->f_flags & O_NONBLOCK) ? PARPORT_INACTIVITY_O_NONBLOCK : pp->default_inactivity); while (bytes_written < count) { ssize_t n = min_t(unsigned long, count - bytes_written, PP_BUFFER_SIZE); if (copy_from_user(kbuffer, buf + bytes_written, n)) { bytes_written = -EFAULT; break; } if ((pp->flags & PP_FASTWRITE) && (mode == IEEE1284_MODE_EPP)) { /* do a fast EPP write */ if (pport->ieee1284.mode & IEEE1284_ADDR) { wrote = pport->ops->epp_write_addr(pport, kbuffer, n, PARPORT_EPP_FAST); } else { wrote = pport->ops->epp_write_data(pport, kbuffer, n, PARPORT_EPP_FAST); } } else { wrote = parport_write(pp->pdev->port, kbuffer, n); } if (wrote <= 0) { if (!bytes_written) bytes_written = wrote; break; } bytes_written += wrote; if (file->f_flags & O_NONBLOCK) { if (!bytes_written) bytes_written = -EAGAIN; break; } if (signal_pending(current)) break; cond_resched(); } parport_set_timeout(pp->pdev, pp->default_inactivity); kfree(kbuffer); pp_enable_irq(pp); return bytes_written;} static void pp_irq(void *private){ struct pp_struct *pp = private; if (pp->irqresponse) { parport_write_control(pp->pdev->port, pp->irqctl); pp->irqresponse = 0; } atomic_inc(&pp->irqc); wake_up_interruptible(&pp->irq_wait);} static int register_device(int minor, struct pp_struct *pp){ struct parport *port; struct pardevice *pdev = NULL; char *name; struct pardev_cb ppdev_cb; int rc = 0, index; name = kasprintf(GFP_KERNEL, CHRDEV "%x", minor); if (name == NULL) return -ENOMEM; port = parport_find_number(minor); if (!port) { pr_warn("%s: no associated port!\n", name); rc = -ENXIO; goto err; } index = ida_simple_get(&ida_index, 0, 0, GFP_KERNEL); memset(&ppdev_cb, 0, sizeof(ppdev_cb)); ppdev_cb.irq_func = pp_irq; ppdev_cb.flags = (pp->flags & PP_EXCL) ? PARPORT_FLAG_EXCL : 0; ppdev_cb.private = pp; pdev = parport_register_dev_model(port, name, &ppdev_cb, index); parport_put_port(port); if (!pdev) { pr_warn("%s: failed to register device!\n", name); rc = -ENXIO; ida_simple_remove(&ida_index, index); goto err; } pp->pdev = pdev; pp->index = index; dev_dbg(&pdev->dev, "registered pardevice\n");err: kfree(name); return rc;} static enum ieee1284_phase init_phase(int mode){ switch (mode & ~(IEEE1284_DEVICEID | IEEE1284_ADDR)) { case IEEE1284_MODE_NIBBLE: case IEEE1284_MODE_BYTE: return IEEE1284_PH_REV_IDLE; } return IEEE1284_PH_FWD_IDLE;} static int pp_set_timeout(struct pardevice *pdev, long tv_sec, int tv_usec){ long to_jiffies; if ((tv_sec < 0) || (tv_usec < 0)) return -EINVAL; to_jiffies = usecs_to_jiffies(tv_usec); to_jiffies += tv_sec * HZ; if (to_jiffies <= 0) return -EINVAL; pdev->timeout = to_jiffies; return 0;} static int pp_do_ioctl(struct file *file, unsigned int cmd, unsigned long arg){ unsigned int minor = iminor(file_inode(file)); struct pp_struct *pp = file->private_data; struct parport *port; void __user *argp = (void __user *)arg; /* First handle the cases that don't take arguments. */ switch (cmd) { case PPCLAIM: { struct ieee1284_info *info; int ret; if (pp->flags & PP_CLAIMED) { dev_dbg(&pp->pdev->dev, "you've already got it!\n"); return -EINVAL; } /* Deferred device registration. */ if (!pp->pdev) { int err = register_device(minor, pp); if (err) return err; } ret = parport_claim_or_block(pp->pdev); if (ret < 0) return ret; pp->flags |= PP_CLAIMED; /* For interrupt-reporting to work, we need to be * informed of each interrupt. */ pp_enable_irq(pp); /* We may need to fix up the state machine. */ info = &pp->pdev->port->ieee1284; pp->saved_state.mode = info->mode; pp->saved_state.phase = info->phase; info->mode = pp->state.mode; info->phase = pp->state.phase; pp->default_inactivity = parport_set_timeout(pp->pdev, 0); parport_set_timeout(pp->pdev, pp->default_inactivity); return 0; } case PPEXCL: if (pp->pdev) { dev_dbg(&pp->pdev->dev, "too late for PPEXCL; already registered\n"); if (pp->flags & PP_EXCL) /* But it's not really an error. */ return 0; /* There's no chance of making the driver happy. */ return -EINVAL; } /* Just remember to register the device exclusively * when we finally do the registration. */ pp->flags |= PP_EXCL; return 0; case PPSETMODE: { int mode; if (copy_from_user(&mode, argp, sizeof(mode))) return -EFAULT; /* FIXME: validate mode */ pp->state.mode = mode; pp->state.phase = init_phase(mode); if (pp->flags & PP_CLAIMED) { pp->pdev->port->ieee1284.mode = mode; pp->pdev->port->ieee1284.phase = pp->state.phase; } return 0; } case PPGETMODE: { int mode; if (pp->flags & PP_CLAIMED) mode = pp->pdev->port->ieee1284.mode; else mode = pp->state.mode; if (copy_to_user(argp, &mode, sizeof(mode))) return -EFAULT; return 0; } case PPSETPHASE: { int phase; if (copy_from_user(&phase, argp, sizeof(phase))) return -EFAULT; /* FIXME: validate phase */ pp->state.phase = phase; if (pp->flags & PP_CLAIMED) pp->pdev->port->ieee1284.phase = phase; return 0; } case PPGETPHASE: { int phase; if (pp->flags & PP_CLAIMED) phase = pp->pdev->port->ieee1284.phase; else phase = pp->state.phase; if (copy_to_user(argp, &phase, sizeof(phase))) return -EFAULT; return 0; } case PPGETMODES: { unsigned int modes; port = parport_find_number(minor); if (!port) return -ENODEV; modes = port->modes; parport_put_port(port); if (copy_to_user(argp, &modes, sizeof(modes))) return -EFAULT; return 0; } case PPSETFLAGS: { int uflags; if (copy_from_user(&uflags, argp, sizeof(uflags))) return -EFAULT; pp->flags &= ~PP_FLAGMASK; pp->flags |= (uflags & PP_FLAGMASK); return 0; } case PPGETFLAGS: { int uflags; uflags = pp->flags & PP_FLAGMASK;Lines 1–500 of 884. Load more
// SPDX-License-Identifier: GPL-2.0-or-later /* * linux/drivers/char/ppdev.c * * This is the code behind /dev/parport* -- it allows a user-space * application to use the parport subsystem. * * Copyright (C) 1998-2000, 2002 Tim Waugh <tim@cyberelk.net> * * A /dev/parportx device node represents an arbitrary device * on port 'x'. The following operations are possible: * * open do nothing, set up default IEEE 1284 protocol to be COMPAT * close release port and unregister device (if necessary) * ioctl * EXCL register device exclusively (may fail) * CLAIM (register device first time) parport_claim_or_block * RELEASE parport_release * SETMODE set the IEEE 1284 protocol to use for read/write * SETPHASE set the IEEE 1284 phase of a particular mode. Not to be * confused with ioctl(fd, SETPHASER, &stun). ;-) * DATADIR data_forward / data_reverse * WDATA write_data * RDATA read_data * WCONTROL write_control * RCONTROL read_control * FCONTROL frob_control * RSTATUS read_status * NEGOT parport_negotiate * YIELD parport_yield_blocking * WCTLONIRQ on interrupt, set control lines * CLRIRQ clear (and return) interrupt count * SETTIME sets device timeout (struct timeval) * GETTIME gets device timeout (struct timeval) * GETMODES gets hardware supported modes (unsigned int) * GETMODE gets the current IEEE1284 mode * GETPHASE gets the current IEEE1284 phase * GETFLAGS gets current (user-visible) flags * SETFLAGS sets current (user-visible) flags * read/write read or write in current IEEE 1284 protocol * select wait for interrupt (in readfds) * * Changes: * Added SETTIME/GETTIME ioctl, Fred Barnes, 1999. * * Arnaldo Carvalho de Melo <acme@conectiva.com.br> 2000/08/25 * - On error, copy_from_user and copy_to_user do not return -EFAULT, * They return the positive number of bytes *not* copied due to address * space errors. * * Added GETMODES/GETMODE/GETPHASE ioctls, Fred Barnes <frmb2@ukc.ac.uk>, 03/01/2001. * Added GETFLAGS/SETFLAGS ioctls, Fred Barnes, 04/2001 */ #include <linux/module.h> #include <linux/init.h> #include <linux/sched/signal.h> #include <linux/device.h> #include <linux/ioctl.h> #include <linux/parport.h> #include <linux/ctype.h> #include <linux/poll.h> #include <linux/slab.h> #include <linux/major.h> #include <linux/ppdev.h> #include <linux/mutex.h> #include <linux/uaccess.h> #include <linux/compat.h> #define PP_VERSION "ppdev: user-space parallel port driver" #define CHRDEV "ppdev" struct pp_struct { struct pardevice *pdev; wait_queue_head_t irq_wait; atomic_t irqc; unsigned int flags; int irqresponse; unsigned char irqctl; struct ieee1284_info state; struct ieee1284_info saved_state; long default_inactivity; int index; }; /* should we use PARDEVICE_MAX here? */ static struct device *devices[PARPORT_MAX]; static DEFINE_IDA(ida_index); /* pp_struct.flags bitfields */ #define PP_CLAIMED (1<<0) #define PP_EXCL (1<<1) /* Other constants */ #define PP_INTERRUPT_TIMEOUT (10 * HZ) /* 10s */ #define PP_BUFFER_SIZE 1024 #define PARDEVICE_MAX 8 static DEFINE_MUTEX(pp_do_mutex); /* define fixed sized ioctl cmd for y2038 migration */ #define PPGETTIME32 _IOR(PP_IOCTL, 0x95, s32[2]) #define PPSETTIME32 _IOW(PP_IOCTL, 0x96, s32[2]) #define PPGETTIME64 _IOR(PP_IOCTL, 0x95, s64[2]) #define PPSETTIME64 _IOW(PP_IOCTL, 0x96, s64[2]) static inline void pp_enable_irq(struct pp_struct *pp) { struct parport *port = pp->pdev->port; port->ops->enable_irq(port); } static ssize_t pp_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) { unsigned int minor = iminor(file_inode(file)); struct pp_struct *pp = file->private_data; char *kbuffer; ssize_t bytes_read = 0; struct parport *pport; int mode; if (!(pp->flags & PP_CLAIMED)) { /* Don't have the port claimed */ pr_debug(CHRDEV "%x: claim the port first\n", minor); return -EINVAL; } /* Trivial case. */ if (count == 0) return 0; kbuffer = kmalloc(min_t(size_t, count, PP_BUFFER_SIZE), GFP_KERNEL); if (!kbuffer) return -ENOMEM; pport = pp->pdev->port; mode = pport->ieee1284.mode & ~(IEEE1284_DEVICEID | IEEE1284_ADDR); parport_set_timeout(pp->pdev, (file->f_flags & O_NONBLOCK) ? PARPORT_INACTIVITY_O_NONBLOCK : pp->default_inactivity); while (bytes_read == 0) { ssize_t need = min_t(unsigned long, count, PP_BUFFER_SIZE); if (mode == IEEE1284_MODE_EPP) { /* various specials for EPP mode */ int flags = 0; size_t (*fn)(struct parport *, void *, size_t, int); if (pp->flags & PP_W91284PIC) flags |= PARPORT_W91284PIC; if (pp->flags & PP_FASTREAD) flags |= PARPORT_EPP_FAST; if (pport->ieee1284.mode & IEEE1284_ADDR) fn = pport->ops->epp_read_addr; else fn = pport->ops->epp_read_data; bytes_read = (*fn)(pport, kbuffer, need, flags); } else { bytes_read = parport_read(pport, kbuffer, need); } if (bytes_read != 0) break; if (file->f_flags & O_NONBLOCK) { bytes_read = -EAGAIN; break; } if (signal_pending(current)) { bytes_read = -ERESTARTSYS; break; } cond_resched(); } parport_set_timeout(pp->pdev, pp->default_inactivity); if (bytes_read > 0 && copy_to_user(buf, kbuffer, bytes_read)) bytes_read = -EFAULT; kfree(kbuffer); pp_enable_irq(pp); return bytes_read; } static ssize_t pp_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) { unsigned int minor = iminor(file_inode(file)); struct pp_struct *pp = file->private_data; char *kbuffer; ssize_t bytes_written = 0; ssize_t wrote; int mode; struct parport *pport; if (!(pp->flags & PP_CLAIMED)) { /* Don't have the port claimed */ pr_debug(CHRDEV "%x: claim the port first\n", minor); return -EINVAL; } kbuffer = kmalloc(min_t(size_t, count, PP_BUFFER_SIZE), GFP_KERNEL); if (!kbuffer) return -ENOMEM; pport = pp->pdev->port; mode = pport->ieee1284.mode & ~(IEEE1284_DEVICEID | IEEE1284_ADDR); parport_set_timeout(pp->pdev, (file->f_flags & O_NONBLOCK) ? PARPORT_INACTIVITY_O_NONBLOCK : pp->default_inactivity); while (bytes_written < count) { ssize_t n = min_t(unsigned long, count - bytes_written, PP_BUFFER_SIZE); if (copy_from_user(kbuffer, buf + bytes_written, n)) { bytes_written = -EFAULT; break; } if ((pp->flags & PP_FASTWRITE) && (mode == IEEE1284_MODE_EPP)) { /* do a fast EPP write */ if (pport->ieee1284.mode & IEEE1284_ADDR) { wrote = pport->ops->epp_write_addr(pport, kbuffer, n, PARPORT_EPP_FAST); } else { wrote = pport->ops->epp_write_data(pport, kbuffer, n, PARPORT_EPP_FAST); } } else { wrote = parport_write(pp->pdev->port, kbuffer, n); } if (wrote <= 0) { if (!bytes_written) bytes_written = wrote; break; } bytes_written += wrote; if (file->f_flags & O_NONBLOCK) { if (!bytes_written) bytes_written = -EAGAIN; break; } if (signal_pending(current)) break; cond_resched(); } parport_set_timeout(pp->pdev, pp->default_inactivity); kfree(kbuffer); pp_enable_irq(pp); return bytes_written; } static void pp_irq(void *private) { struct pp_struct *pp = private; if (pp->irqresponse) { parport_write_control(pp->pdev->port, pp->irqctl); pp->irqresponse = 0; } atomic_inc(&pp->irqc); wake_up_interruptible(&pp->irq_wait); } static int register_device(int minor, struct pp_struct *pp) { struct parport *port; struct pardevice *pdev = NULL; char *name; struct pardev_cb ppdev_cb; int rc = 0, index; name = kasprintf(GFP_KERNEL, CHRDEV "%x", minor); if (name == NULL) return -ENOMEM; port = parport_find_number(minor); if (!port) { pr_warn("%s: no associated port!\n", name); rc = -ENXIO; goto err; } index = ida_simple_get(&ida_index, 0, 0, GFP_KERNEL); memset(&ppdev_cb, 0, sizeof(ppdev_cb)); ppdev_cb.irq_func = pp_irq; ppdev_cb.flags = (pp->flags & PP_EXCL) ? PARPORT_FLAG_EXCL : 0; ppdev_cb.private = pp; pdev = parport_register_dev_model(port, name, &ppdev_cb, index); parport_put_port(port); if (!pdev) { pr_warn("%s: failed to register device!\n", name); rc = -ENXIO; ida_simple_remove(&ida_index, index); goto err; } pp->pdev = pdev; pp->index = index; dev_dbg(&pdev->dev, "registered pardevice\n"); err: kfree(name); return rc; } static enum ieee1284_phase init_phase(int mode) { switch (mode & ~(IEEE1284_DEVICEID | IEEE1284_ADDR)) { case IEEE1284_MODE_NIBBLE: case IEEE1284_MODE_BYTE: return IEEE1284_PH_REV_IDLE; } return IEEE1284_PH_FWD_IDLE; } static int pp_set_timeout(struct pardevice *pdev, long tv_sec, int tv_usec) { long to_jiffies; if ((tv_sec < 0) || (tv_usec < 0)) return -EINVAL; to_jiffies = usecs_to_jiffies(tv_usec); to_jiffies += tv_sec * HZ; if (to_jiffies <= 0) return -EINVAL; pdev->timeout = to_jiffies; return 0; } static int pp_do_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { unsigned int minor = iminor(file_inode(file)); struct pp_struct *pp = file->private_data; struct parport *port; void __user *argp = (void __user *)arg; /* First handle the cases that don't take arguments. */ switch (cmd) { case PPCLAIM: { struct ieee1284_info *info; int ret; if (pp->flags & PP_CLAIMED) { dev_dbg(&pp->pdev->dev, "you've already got it!\n"); return -EINVAL; } /* Deferred device registration. */ if (!pp->pdev) { int err = register_device(minor, pp); if (err) return err; } ret = parport_claim_or_block(pp->pdev); if (ret < 0) return ret; pp->flags |= PP_CLAIMED; /* For interrupt-reporting to work, we need to be * informed of each interrupt. */ pp_enable_irq(pp); /* We may need to fix up the state machine. */ info = &pp->pdev->port->ieee1284; pp->saved_state.mode = info->mode; pp->saved_state.phase = info->phase; info->mode = pp->state.mode; info->phase = pp->state.phase; pp->default_inactivity = parport_set_timeout(pp->pdev, 0); parport_set_timeout(pp->pdev, pp->default_inactivity); return 0; } case PPEXCL: if (pp->pdev) { dev_dbg(&pp->pdev->dev, "too late for PPEXCL; already registered\n"); if (pp->flags & PP_EXCL) /* But it's not really an error. */ return 0; /* There's no chance of making the driver happy. */ return -EINVAL; } /* Just remember to register the device exclusively * when we finally do the registration. */ pp->flags |= PP_EXCL; return 0; case PPSETMODE: { int mode; if (copy_from_user(&mode, argp, sizeof(mode))) return -EFAULT; /* FIXME: validate mode */ pp->state.mode = mode; pp->state.phase = init_phase(mode); if (pp->flags & PP_CLAIMED) { pp->pdev->port->ieee1284.mode = mode; pp->pdev->port->ieee1284.phase = pp->state.phase; } return 0; } case PPGETMODE: { int mode; if (pp->flags & PP_CLAIMED) mode = pp->pdev->port->ieee1284.mode; else mode = pp->state.mode; if (copy_to_user(argp, &mode, sizeof(mode))) return -EFAULT; return 0; } case PPSETPHASE: { int phase; if (copy_from_user(&phase, argp, sizeof(phase))) return -EFAULT; /* FIXME: validate phase */ pp->state.phase = phase; if (pp->flags & PP_CLAIMED) pp->pdev->port->ieee1284.phase = phase; return 0; } case PPGETPHASE: { int phase; if (pp->flags & PP_CLAIMED) phase = pp->pdev->port->ieee1284.phase; else phase = pp->state.phase; if (copy_to_user(argp, &phase, sizeof(phase))) return -EFAULT; return 0; } case PPGETMODES: { unsigned int modes; port = parport_find_number(minor); if (!port) return -ENODEV; modes = port->modes; parport_put_port(port); if (copy_to_user(argp, &modes, sizeof(modes))) return -EFAULT; return 0; } case PPSETFLAGS: { int uflags; if (copy_from_user(&uflags, argp, sizeof(uflags))) return -EFAULT; pp->flags &= ~PP_FLAGMASK; pp->flags |= (uflags & PP_FLAGMASK); return 0; } case PPGETFLAGS: { int uflags; uflags = pp->flags & PP_FLAGMASK;