From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- drivers/isdn/hardware/eicon/divasi.c | 581 +++++++++++++++++++++++++++++++++++ 1 file changed, 581 insertions(+) create mode 100644 drivers/isdn/hardware/eicon/divasi.c (limited to 'drivers/isdn/hardware/eicon/divasi.c') diff --git a/drivers/isdn/hardware/eicon/divasi.c b/drivers/isdn/hardware/eicon/divasi.c new file mode 100644 index 0000000..df715b4 --- /dev/null +++ b/drivers/isdn/hardware/eicon/divasi.c @@ -0,0 +1,581 @@ +/* $Id: divasi.c,v 1.25.6.2 2005/01/31 12:22:20 armin Exp $ + * + * Driver for Eicon DIVA Server ISDN cards. + * User Mode IDI Interface + * + * Copyright 2000-2003 by Armin Schindler (mac@melware.de) + * Copyright 2000-2003 Cytronics & Melware (info@melware.de) + * + * This software may be used and distributed according to the terms + * of the GNU General Public License, incorporated herein by reference. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "platform.h" +#include "di_defs.h" +#include "divasync.h" +#include "um_xdi.h" +#include "um_idi.h" + +static char *main_revision = "$Revision: 1.25.6.2 $"; + +static int major; + +MODULE_DESCRIPTION("User IDI Interface for Eicon ISDN cards"); +MODULE_AUTHOR("Cytronics & Melware, Eicon Networks"); +MODULE_SUPPORTED_DEVICE("DIVA card driver"); +MODULE_LICENSE("GPL"); + +typedef struct _diva_um_idi_os_context { + wait_queue_head_t read_wait; + wait_queue_head_t close_wait; + struct timer_list diva_timer_id; + int aborted; + int adapter_nr; +} diva_um_idi_os_context_t; + +static char *DRIVERNAME = "Eicon DIVA - User IDI (http://www.melware.net)"; +static char *DRIVERLNAME = "diva_idi"; +static char *DEVNAME = "DivasIDI"; +char *DRIVERRELEASE_IDI = "2.0"; + +extern int idifunc_init(void); +extern void idifunc_finit(void); + +/* + * helper functions + */ +static char *getrev(const char *revision) +{ + char *rev; + char *p; + if ((p = strchr(revision, ':'))) { + rev = p + 2; + p = strchr(rev, '$'); + *--p = 0; + } else + rev = "1.0"; + return rev; +} + +/* + * LOCALS + */ +static ssize_t um_idi_read(struct file *file, char __user *buf, size_t count, + loff_t * offset); +static ssize_t um_idi_write(struct file *file, const char __user *buf, + size_t count, loff_t * offset); +static unsigned int um_idi_poll(struct file *file, poll_table * wait); +static int um_idi_open(struct inode *inode, struct file *file); +static int um_idi_release(struct inode *inode, struct file *file); +static int remove_entity(void *entity); +static void diva_um_timer_function(unsigned long data); + +/* + * proc entry + */ +extern struct proc_dir_entry *proc_net_eicon; +static struct proc_dir_entry *um_idi_proc_entry = NULL; + +static int +um_idi_proc_read(char *page, char **start, off_t off, int count, int *eof, + void *data) +{ + int len = 0; + char tmprev[32]; + + len += sprintf(page + len, "%s\n", DRIVERNAME); + len += sprintf(page + len, "name : %s\n", DRIVERLNAME); + len += sprintf(page + len, "release : %s\n", DRIVERRELEASE_IDI); + strcpy(tmprev, main_revision); + len += sprintf(page + len, "revision : %s\n", getrev(tmprev)); + len += sprintf(page + len, "build : %s\n", DIVA_BUILD); + len += sprintf(page + len, "major : %d\n", major); + + if (off + count >= len) + *eof = 1; + if (len < off) + return 0; + *start = page + off; + return ((count < len - off) ? count : len - off); +} + +static int DIVA_INIT_FUNCTION create_um_idi_proc(void) +{ + um_idi_proc_entry = create_proc_entry(DRIVERLNAME, + S_IFREG | S_IRUGO | S_IWUSR, + proc_net_eicon); + if (!um_idi_proc_entry) + return (0); + + um_idi_proc_entry->read_proc = um_idi_proc_read; + um_idi_proc_entry->owner = THIS_MODULE; + + return (1); +} + +static void remove_um_idi_proc(void) +{ + if (um_idi_proc_entry) { + remove_proc_entry(DRIVERLNAME, proc_net_eicon); + um_idi_proc_entry = NULL; + } +} + +static struct file_operations divas_idi_fops = { + .owner = THIS_MODULE, + .llseek = no_llseek, + .read = um_idi_read, + .write = um_idi_write, + .poll = um_idi_poll, + .open = um_idi_open, + .release = um_idi_release +}; + +static void divas_idi_unregister_chrdev(void) +{ + devfs_remove(DEVNAME); + unregister_chrdev(major, DEVNAME); +} + +static int DIVA_INIT_FUNCTION divas_idi_register_chrdev(void) +{ + if ((major = register_chrdev(0, DEVNAME, &divas_idi_fops)) < 0) + { + printk(KERN_ERR "%s: failed to create /dev entry.\n", + DRIVERLNAME); + return (0); + } + devfs_mk_cdev(MKDEV(major, 0), S_IFCHR|S_IRUSR|S_IWUSR, DEVNAME); + + return (1); +} + +/* +** Driver Load +*/ +static int DIVA_INIT_FUNCTION divasi_init(void) +{ + char tmprev[50]; + int ret = 0; + + printk(KERN_INFO "%s\n", DRIVERNAME); + printk(KERN_INFO "%s: Rel:%s Rev:", DRIVERLNAME, DRIVERRELEASE_IDI); + strcpy(tmprev, main_revision); + printk("%s Build: %s\n", getrev(tmprev), DIVA_BUILD); + + if (!divas_idi_register_chrdev()) { + ret = -EIO; + goto out; + } + + if (!create_um_idi_proc()) { + divas_idi_unregister_chrdev(); + printk(KERN_ERR "%s: failed to create proc entry.\n", + DRIVERLNAME); + ret = -EIO; + goto out; + } + + if (!(idifunc_init())) { + remove_um_idi_proc(); + divas_idi_unregister_chrdev(); + printk(KERN_ERR "%s: failed to connect to DIDD.\n", + DRIVERLNAME); + ret = -EIO; + goto out; + } + printk(KERN_INFO "%s: started with major %d\n", DRIVERLNAME, major); + + out: + return (ret); +} + + +/* +** Driver Unload +*/ +static void DIVA_EXIT_FUNCTION divasi_exit(void) +{ + idifunc_finit(); + remove_um_idi_proc(); + divas_idi_unregister_chrdev(); + + printk(KERN_INFO "%s: module unloaded.\n", DRIVERLNAME); +} + +module_init(divasi_init); +module_exit(divasi_exit); + + +/* + * FILE OPERATIONS + */ + +static int +divas_um_idi_copy_to_user(void *os_handle, void *dst, const void *src, + int length) +{ + memcpy(dst, src, length); + return (length); +} + +static ssize_t +um_idi_read(struct file *file, char __user *buf, size_t count, loff_t * offset) +{ + diva_um_idi_os_context_t *p_os; + int ret = -EINVAL; + void *data; + + if (!file->private_data) { + return (-ENODEV); + } + + if (! + (p_os = + (diva_um_idi_os_context_t *) diva_um_id_get_os_context(file-> + private_data))) + { + return (-ENODEV); + } + if (p_os->aborted) { + return (-ENODEV); + } + + if (!(data = diva_os_malloc(0, count))) { + return (-ENOMEM); + } + + ret = diva_um_idi_read(file->private_data, + file, data, count, + divas_um_idi_copy_to_user); + switch (ret) { + case 0: /* no message available */ + ret = (-EAGAIN); + break; + case (-1): /* adapter was removed */ + ret = (-ENODEV); + break; + case (-2): /* message_length > length of user buffer */ + ret = (-EFAULT); + break; + } + + if (ret > 0) { + if (copy_to_user(buf, data, ret)) { + ret = (-EFAULT); + } + } + + diva_os_free(0, data); + DBG_TRC(("read: ret %d", ret)); + return (ret); +} + + +static int +divas_um_idi_copy_from_user(void *os_handle, void *dst, const void *src, + int length) +{ + memcpy(dst, src, length); + return (length); +} + +static int um_idi_open_adapter(struct file *file, int adapter_nr) +{ + diva_um_idi_os_context_t *p_os; + void *e = + divas_um_idi_create_entity((dword) adapter_nr, (void *) file); + + if (!(file->private_data = e)) { + return (0); + } + p_os = (diva_um_idi_os_context_t *) diva_um_id_get_os_context(e); + init_waitqueue_head(&p_os->read_wait); + init_waitqueue_head(&p_os->close_wait); + init_timer(&p_os->diva_timer_id); + p_os->diva_timer_id.function = (void *) diva_um_timer_function; + p_os->diva_timer_id.data = (unsigned long) p_os; + p_os->aborted = 0; + p_os->adapter_nr = adapter_nr; + return (1); +} + +static ssize_t +um_idi_write(struct file *file, const char __user *buf, size_t count, + loff_t * offset) +{ + diva_um_idi_os_context_t *p_os; + int ret = -EINVAL; + void *data; + int adapter_nr = 0; + + if (!file->private_data) { + /* the first write() selects the adapter_nr */ + if (count == sizeof(int)) { + if (copy_from_user + ((void *) &adapter_nr, buf, + count)) return (-EFAULT); + if (!(um_idi_open_adapter(file, adapter_nr))) + return (-ENODEV); + return (count); + } else + return (-ENODEV); + } + + if (!(p_os = + (diva_um_idi_os_context_t *) diva_um_id_get_os_context(file-> + private_data))) + { + return (-ENODEV); + } + if (p_os->aborted) { + return (-ENODEV); + } + + if (!(data = diva_os_malloc(0, count))) { + return (-ENOMEM); + } + + if (copy_from_user(data, buf, count)) { + ret = -EFAULT; + } else { + ret = diva_um_idi_write(file->private_data, + file, data, count, + divas_um_idi_copy_from_user); + switch (ret) { + case 0: /* no space available */ + ret = (-EAGAIN); + break; + case (-1): /* adapter was removed */ + ret = (-ENODEV); + break; + case (-2): /* length of user buffer > max message_length */ + ret = (-EFAULT); + break; + } + } + diva_os_free(0, data); + DBG_TRC(("write: ret %d", ret)); + return (ret); +} + +static unsigned int um_idi_poll(struct file *file, poll_table * wait) +{ + diva_um_idi_os_context_t *p_os; + + if (!file->private_data) { + return (POLLERR); + } + + if ((!(p_os = + (diva_um_idi_os_context_t *) + diva_um_id_get_os_context(file->private_data))) + || p_os->aborted) { + return (POLLERR); + } + + poll_wait(file, &p_os->read_wait, wait); + + if (p_os->aborted) { + return (POLLERR); + } + + switch (diva_user_mode_idi_ind_ready(file->private_data, file)) { + case (-1): + return (POLLERR); + + case 0: + return (0); + } + + return (POLLIN | POLLRDNORM); +} + +static int um_idi_open(struct inode *inode, struct file *file) +{ + return (0); +} + + +static int um_idi_release(struct inode *inode, struct file *file) +{ + diva_um_idi_os_context_t *p_os; + unsigned int adapter_nr; + int ret = 0; + + if (!(file->private_data)) { + ret = -ENODEV; + goto out; + } + + if (!(p_os = + (diva_um_idi_os_context_t *) diva_um_id_get_os_context(file->private_data))) { + ret = -ENODEV; + goto out; + } + + adapter_nr = p_os->adapter_nr; + + if ((ret = remove_entity(file->private_data))) { + goto out; + } + + if (divas_um_idi_delete_entity + ((int) adapter_nr, file->private_data)) { + ret = -ENODEV; + goto out; + } + + out: + return (ret); +} + +int diva_os_get_context_size(void) +{ + return (sizeof(diva_um_idi_os_context_t)); +} + +void diva_os_wakeup_read(void *os_context) +{ + diva_um_idi_os_context_t *p_os = + (diva_um_idi_os_context_t *) os_context; + wake_up_interruptible(&p_os->read_wait); +} + +void diva_os_wakeup_close(void *os_context) +{ + diva_um_idi_os_context_t *p_os = + (diva_um_idi_os_context_t *) os_context; + wake_up_interruptible(&p_os->close_wait); +} + +static +void diva_um_timer_function(unsigned long data) +{ + diva_um_idi_os_context_t *p_os = (diva_um_idi_os_context_t *) data; + + p_os->aborted = 1; + wake_up_interruptible(&p_os->read_wait); + wake_up_interruptible(&p_os->close_wait); + DBG_ERR(("entity removal watchdog")) +} + +/* +** If application exits without entity removal this function will remove +** entity and block until removal is complete +*/ +static int remove_entity(void *entity) +{ + struct task_struct *curtask = current; + diva_um_idi_os_context_t *p_os; + + diva_um_idi_stop_wdog(entity); + + if (!entity) { + DBG_FTL(("Zero entity on remove")) + return (0); + } + + if (!(p_os = + (diva_um_idi_os_context_t *) + diva_um_id_get_os_context(entity))) { + DBG_FTL(("Zero entity os context on remove")) + return (0); + } + + if (!divas_um_idi_entity_assigned(entity) || p_os->aborted) { + /* + Entity is not assigned, also can be removed + */ + return (0); + } + + DBG_TRC(("E(%08x) check remove", entity)) + + /* + If adapter not answers on remove request inside of + 10 Sec, then adapter is dead + */ + diva_um_idi_start_wdog(entity); + + { + DECLARE_WAITQUEUE(wait, curtask); + + add_wait_queue(&p_os->close_wait, &wait); + for (;;) { + set_current_state(TASK_INTERRUPTIBLE); + if (!divas_um_idi_entity_start_remove(entity) + || p_os->aborted) { + break; + } + schedule(); + } + set_current_state(TASK_RUNNING); + remove_wait_queue(&p_os->close_wait, &wait); + } + + DBG_TRC(("E(%08x) start remove", entity)) + { + DECLARE_WAITQUEUE(wait, curtask); + + add_wait_queue(&p_os->close_wait, &wait); + for (;;) { + set_current_state(TASK_INTERRUPTIBLE); + if (!divas_um_idi_entity_assigned(entity) + || p_os->aborted) { + break; + } + schedule(); + } + set_current_state(TASK_RUNNING); + remove_wait_queue(&p_os->close_wait, &wait); + } + + DBG_TRC(("E(%08x) remove complete, aborted:%d", entity, + p_os->aborted)) + + diva_um_idi_stop_wdog(entity); + + p_os->aborted = 0; + + return (0); +} + +/* + * timer watchdog + */ +void diva_um_idi_start_wdog(void *entity) +{ + diva_um_idi_os_context_t *p_os; + + if (entity && + ((p_os = + (diva_um_idi_os_context_t *) + diva_um_id_get_os_context(entity)))) { + mod_timer(&p_os->diva_timer_id, jiffies + 10 * HZ); + } +} + +void diva_um_idi_stop_wdog(void *entity) +{ + diva_um_idi_os_context_t *p_os; + + if (entity && + ((p_os = + (diva_um_idi_os_context_t *) + diva_um_id_get_os_context(entity)))) { + del_timer(&p_os->diva_timer_id); + } +} -- cgit v1.1