534 lines
12 KiB
C
534 lines
12 KiB
C
/* Sysctl interface for parport devices.
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*
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* Authors: David Campbell <campbell@torque.net>
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* Tim Waugh <tim@cyberelk.demon.co.uk>
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* Philip Blundell <philb@gnu.org>
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* Andrea Arcangeli
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* Riccardo Facchetti <fizban@tin.it>
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*
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* based on work by Grant Guenther <grant@torque.net>
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* and Philip Blundell
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*
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* Cleaned up include files - Russell King <linux@arm.uk.linux.org>
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*/
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#include <linux/string.h>
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#include <linux/config.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/errno.h>
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/parport.h>
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#include <linux/ctype.h>
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#include <linux/sysctl.h>
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#include <asm/uaccess.h>
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#if defined(CONFIG_SYSCTL) && defined(CONFIG_PROC_FS)
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#define PARPORT_MIN_TIMESLICE_VALUE 1ul
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#define PARPORT_MAX_TIMESLICE_VALUE ((unsigned long) HZ)
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#define PARPORT_MIN_SPINTIME_VALUE 1
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#define PARPORT_MAX_SPINTIME_VALUE 1000
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static int do_active_device(ctl_table *table, int write, struct file *filp,
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void __user *result, size_t *lenp, loff_t *ppos)
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{
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struct parport *port = (struct parport *)table->extra1;
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char buffer[256];
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struct pardevice *dev;
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int len = 0;
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if (write) /* can't happen anyway */
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return -EACCES;
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if (*ppos) {
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*lenp = 0;
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return 0;
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}
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for (dev = port->devices; dev ; dev = dev->next) {
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if(dev == port->cad) {
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len += sprintf(buffer, "%s\n", dev->name);
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}
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}
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if(!len) {
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len += sprintf(buffer, "%s\n", "none");
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}
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if (len > *lenp)
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len = *lenp;
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else
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*lenp = len;
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*ppos += len;
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return copy_to_user(result, buffer, len) ? -EFAULT : 0;
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}
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#ifdef CONFIG_PARPORT_1284
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static int do_autoprobe(ctl_table *table, int write, struct file *filp,
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void __user *result, size_t *lenp, loff_t *ppos)
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{
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struct parport_device_info *info = table->extra2;
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const char *str;
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char buffer[256];
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int len = 0;
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if (write) /* permissions stop this */
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return -EACCES;
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if (*ppos) {
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*lenp = 0;
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return 0;
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}
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if ((str = info->class_name) != NULL)
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len += sprintf (buffer + len, "CLASS:%s;\n", str);
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if ((str = info->model) != NULL)
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len += sprintf (buffer + len, "MODEL:%s;\n", str);
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if ((str = info->mfr) != NULL)
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len += sprintf (buffer + len, "MANUFACTURER:%s;\n", str);
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if ((str = info->description) != NULL)
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len += sprintf (buffer + len, "DESCRIPTION:%s;\n", str);
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if ((str = info->cmdset) != NULL)
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len += sprintf (buffer + len, "COMMAND SET:%s;\n", str);
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if (len > *lenp)
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len = *lenp;
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else
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*lenp = len;
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*ppos += len;
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return copy_to_user (result, buffer, len) ? -EFAULT : 0;
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}
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#endif /* IEEE1284.3 support. */
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static int do_hardware_base_addr (ctl_table *table, int write,
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struct file *filp, void __user *result,
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size_t *lenp, loff_t *ppos)
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{
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struct parport *port = (struct parport *)table->extra1;
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char buffer[20];
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int len = 0;
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if (*ppos) {
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*lenp = 0;
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return 0;
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}
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if (write) /* permissions prevent this anyway */
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return -EACCES;
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len += sprintf (buffer, "%lu\t%lu\n", port->base, port->base_hi);
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if (len > *lenp)
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len = *lenp;
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else
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*lenp = len;
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*ppos += len;
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return copy_to_user(result, buffer, len) ? -EFAULT : 0;
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}
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static int do_hardware_irq (ctl_table *table, int write,
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struct file *filp, void __user *result,
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size_t *lenp, loff_t *ppos)
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{
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struct parport *port = (struct parport *)table->extra1;
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char buffer[20];
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int len = 0;
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if (*ppos) {
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*lenp = 0;
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return 0;
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}
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if (write) /* permissions prevent this anyway */
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return -EACCES;
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len += sprintf (buffer, "%d\n", port->irq);
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if (len > *lenp)
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len = *lenp;
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else
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*lenp = len;
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*ppos += len;
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return copy_to_user(result, buffer, len) ? -EFAULT : 0;
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}
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static int do_hardware_dma (ctl_table *table, int write,
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struct file *filp, void __user *result,
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size_t *lenp, loff_t *ppos)
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{
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struct parport *port = (struct parport *)table->extra1;
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char buffer[20];
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int len = 0;
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if (*ppos) {
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*lenp = 0;
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return 0;
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}
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if (write) /* permissions prevent this anyway */
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return -EACCES;
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len += sprintf (buffer, "%d\n", port->dma);
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if (len > *lenp)
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len = *lenp;
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else
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*lenp = len;
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*ppos += len;
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return copy_to_user(result, buffer, len) ? -EFAULT : 0;
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}
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static int do_hardware_modes (ctl_table *table, int write,
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struct file *filp, void __user *result,
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size_t *lenp, loff_t *ppos)
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{
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struct parport *port = (struct parport *)table->extra1;
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char buffer[40];
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int len = 0;
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if (*ppos) {
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*lenp = 0;
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return 0;
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}
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if (write) /* permissions prevent this anyway */
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return -EACCES;
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{
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#define printmode(x) {if(port->modes&PARPORT_MODE_##x){len+=sprintf(buffer+len,"%s%s",f?",":"",#x);f++;}}
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int f = 0;
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printmode(PCSPP);
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printmode(TRISTATE);
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printmode(COMPAT);
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printmode(EPP);
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printmode(ECP);
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printmode(DMA);
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#undef printmode
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}
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buffer[len++] = '\n';
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if (len > *lenp)
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len = *lenp;
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else
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*lenp = len;
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*ppos += len;
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return copy_to_user(result, buffer, len) ? -EFAULT : 0;
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}
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#define PARPORT_PORT_DIR(child) { 0, NULL, NULL, 0, 0555, child }
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#define PARPORT_PARPORT_DIR(child) { DEV_PARPORT, "parport", \
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NULL, 0, 0555, child }
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#define PARPORT_DEV_DIR(child) { CTL_DEV, "dev", NULL, 0, 0555, child }
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#define PARPORT_DEVICES_ROOT_DIR { DEV_PARPORT_DEVICES, "devices", \
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NULL, 0, 0555, NULL }
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static const unsigned long parport_min_timeslice_value =
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PARPORT_MIN_TIMESLICE_VALUE;
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static const unsigned long parport_max_timeslice_value =
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PARPORT_MAX_TIMESLICE_VALUE;
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static const int parport_min_spintime_value =
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PARPORT_MIN_SPINTIME_VALUE;
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static const int parport_max_spintime_value =
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PARPORT_MAX_SPINTIME_VALUE;
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struct parport_sysctl_table {
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struct ctl_table_header *sysctl_header;
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ctl_table vars[12];
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ctl_table device_dir[2];
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ctl_table port_dir[2];
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ctl_table parport_dir[2];
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ctl_table dev_dir[2];
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};
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static const struct parport_sysctl_table parport_sysctl_template = {
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NULL,
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{
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{ DEV_PARPORT_SPINTIME, "spintime",
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NULL, sizeof(int), 0644, NULL,
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&proc_dointvec_minmax, NULL, NULL,
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(void*) &parport_min_spintime_value,
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(void*) &parport_max_spintime_value },
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{ DEV_PARPORT_BASE_ADDR, "base-addr",
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NULL, 0, 0444, NULL,
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&do_hardware_base_addr },
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{ DEV_PARPORT_IRQ, "irq",
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NULL, 0, 0444, NULL,
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&do_hardware_irq },
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{ DEV_PARPORT_DMA, "dma",
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NULL, 0, 0444, NULL,
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&do_hardware_dma },
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{ DEV_PARPORT_MODES, "modes",
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NULL, 0, 0444, NULL,
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&do_hardware_modes },
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PARPORT_DEVICES_ROOT_DIR,
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#ifdef CONFIG_PARPORT_1284
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{ DEV_PARPORT_AUTOPROBE, "autoprobe",
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NULL, 0, 0444, NULL,
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&do_autoprobe },
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{ DEV_PARPORT_AUTOPROBE + 1, "autoprobe0",
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NULL, 0, 0444, NULL,
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&do_autoprobe },
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{ DEV_PARPORT_AUTOPROBE + 2, "autoprobe1",
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NULL, 0, 0444, NULL,
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&do_autoprobe },
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{ DEV_PARPORT_AUTOPROBE + 3, "autoprobe2",
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NULL, 0, 0444, NULL,
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&do_autoprobe },
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{ DEV_PARPORT_AUTOPROBE + 4, "autoprobe3",
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NULL, 0, 0444, NULL,
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&do_autoprobe },
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#endif /* IEEE 1284 support */
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{0}
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},
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{ {DEV_PARPORT_DEVICES_ACTIVE, "active", NULL, 0, 0444, NULL,
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&do_active_device }, {0}},
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{ PARPORT_PORT_DIR(NULL), {0}},
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{ PARPORT_PARPORT_DIR(NULL), {0}},
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{ PARPORT_DEV_DIR(NULL), {0}}
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};
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struct parport_device_sysctl_table
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{
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struct ctl_table_header *sysctl_header;
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ctl_table vars[2];
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ctl_table device_dir[2];
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ctl_table devices_root_dir[2];
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ctl_table port_dir[2];
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ctl_table parport_dir[2];
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ctl_table dev_dir[2];
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};
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static const struct parport_device_sysctl_table
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parport_device_sysctl_template = {
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NULL,
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{
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{ DEV_PARPORT_DEVICE_TIMESLICE, "timeslice",
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NULL, sizeof(int), 0644, NULL,
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&proc_doulongvec_ms_jiffies_minmax, NULL, NULL,
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(void*) &parport_min_timeslice_value,
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(void*) &parport_max_timeslice_value },
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},
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{ {0, NULL, NULL, 0, 0555, NULL}, {0}},
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{ PARPORT_DEVICES_ROOT_DIR, {0}},
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{ PARPORT_PORT_DIR(NULL), {0}},
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{ PARPORT_PARPORT_DIR(NULL), {0}},
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{ PARPORT_DEV_DIR(NULL), {0}}
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};
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struct parport_default_sysctl_table
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{
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struct ctl_table_header *sysctl_header;
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ctl_table vars[3];
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ctl_table default_dir[2];
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ctl_table parport_dir[2];
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ctl_table dev_dir[2];
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};
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extern unsigned long parport_default_timeslice;
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extern int parport_default_spintime;
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static struct parport_default_sysctl_table
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parport_default_sysctl_table = {
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NULL,
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{
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{ DEV_PARPORT_DEFAULT_TIMESLICE, "timeslice",
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&parport_default_timeslice,
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sizeof(parport_default_timeslice), 0644, NULL,
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&proc_doulongvec_ms_jiffies_minmax, NULL, NULL,
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(void*) &parport_min_timeslice_value,
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(void*) &parport_max_timeslice_value },
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{ DEV_PARPORT_DEFAULT_SPINTIME, "spintime",
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&parport_default_spintime,
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sizeof(parport_default_spintime), 0644, NULL,
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&proc_dointvec_minmax, NULL, NULL,
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(void*) &parport_min_spintime_value,
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(void*) &parport_max_spintime_value },
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{0}
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},
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{ { DEV_PARPORT_DEFAULT, "default", NULL, 0, 0555,
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parport_default_sysctl_table.vars },{0}},
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{
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PARPORT_PARPORT_DIR(parport_default_sysctl_table.default_dir),
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{0}},
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{ PARPORT_DEV_DIR(parport_default_sysctl_table.parport_dir), {0}}
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};
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int parport_proc_register(struct parport *port)
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{
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struct parport_sysctl_table *t;
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int i;
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t = kmalloc(sizeof(*t), GFP_KERNEL);
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if (t == NULL)
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return -ENOMEM;
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memcpy(t, &parport_sysctl_template, sizeof(*t));
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t->device_dir[0].extra1 = port;
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for (i = 0; i < 8; i++)
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t->vars[i].extra1 = port;
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t->vars[0].data = &port->spintime;
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t->vars[5].child = t->device_dir;
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for (i = 0; i < 5; i++)
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t->vars[6 + i].extra2 = &port->probe_info[i];
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t->port_dir[0].procname = port->name;
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t->port_dir[0].ctl_name = port->number + 1; /* nb 0 isn't legal here */
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t->port_dir[0].child = t->vars;
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t->parport_dir[0].child = t->port_dir;
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t->dev_dir[0].child = t->parport_dir;
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t->sysctl_header = register_sysctl_table(t->dev_dir, 0);
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if (t->sysctl_header == NULL) {
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kfree(t);
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t = NULL;
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}
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port->sysctl_table = t;
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return 0;
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}
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int parport_proc_unregister(struct parport *port)
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{
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if (port->sysctl_table) {
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struct parport_sysctl_table *t = port->sysctl_table;
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port->sysctl_table = NULL;
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unregister_sysctl_table(t->sysctl_header);
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kfree(t);
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}
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return 0;
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}
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int parport_device_proc_register(struct pardevice *device)
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{
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struct parport_device_sysctl_table *t;
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struct parport * port = device->port;
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t = kmalloc(sizeof(*t), GFP_KERNEL);
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if (t == NULL)
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return -ENOMEM;
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memcpy(t, &parport_device_sysctl_template, sizeof(*t));
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t->dev_dir[0].child = t->parport_dir;
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t->parport_dir[0].child = t->port_dir;
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t->port_dir[0].procname = port->name;
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t->port_dir[0].ctl_name = port->number + 1; /* nb 0 isn't legal here */
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t->port_dir[0].child = t->devices_root_dir;
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t->devices_root_dir[0].child = t->device_dir;
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#ifdef CONFIG_PARPORT_1284
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t->device_dir[0].ctl_name =
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parport_device_num(port->number, port->muxport,
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device->daisy)
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+ 1; /* nb 0 isn't legal here */
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#else /* No IEEE 1284 support */
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/* parport_device_num isn't available. */
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t->device_dir[0].ctl_name = 1;
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#endif /* IEEE 1284 support or not */
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t->device_dir[0].procname = device->name;
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t->device_dir[0].extra1 = device;
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t->device_dir[0].child = t->vars;
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t->vars[0].data = &device->timeslice;
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t->sysctl_header = register_sysctl_table(t->dev_dir, 0);
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if (t->sysctl_header == NULL) {
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kfree(t);
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t = NULL;
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}
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device->sysctl_table = t;
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return 0;
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}
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int parport_device_proc_unregister(struct pardevice *device)
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{
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if (device->sysctl_table) {
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struct parport_device_sysctl_table *t = device->sysctl_table;
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device->sysctl_table = NULL;
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unregister_sysctl_table(t->sysctl_header);
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kfree(t);
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}
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return 0;
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}
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static int __init parport_default_proc_register(void)
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{
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parport_default_sysctl_table.sysctl_header =
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register_sysctl_table(parport_default_sysctl_table.dev_dir, 0);
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return 0;
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}
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static void __exit parport_default_proc_unregister(void)
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{
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if (parport_default_sysctl_table.sysctl_header) {
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unregister_sysctl_table(parport_default_sysctl_table.
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sysctl_header);
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parport_default_sysctl_table.sysctl_header = NULL;
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}
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}
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#else /* no sysctl or no procfs*/
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int parport_proc_register(struct parport *pp)
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{
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return 0;
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}
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int parport_proc_unregister(struct parport *pp)
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{
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return 0;
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}
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int parport_device_proc_register(struct pardevice *device)
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{
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return 0;
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}
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int parport_device_proc_unregister(struct pardevice *device)
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{
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return 0;
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}
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static int __init parport_default_proc_register (void)
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{
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return 0;
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}
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static void __exit parport_default_proc_unregister (void)
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|
{
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|
}
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#endif
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module_init(parport_default_proc_register)
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module_exit(parport_default_proc_unregister)
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