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android_kernel_xiaomi_sm8350/drivers/isdn/hardware/eicon/mntfunc.c
Linus Torvalds 1da177e4c3 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!
2005-04-16 15:20:36 -07:00

371 lines
8.3 KiB
C
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/* $Id: mntfunc.c,v 1.19.6.4 2005/01/31 12:22:20 armin Exp $
*
* Driver for Eicon DIVA Server ISDN cards.
* Maint module
*
* 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 "platform.h"
#include "di_defs.h"
#include "divasync.h"
#include "debug_if.h"
extern char *DRIVERRELEASE_MNT;
#define DBG_MINIMUM (DL_LOG + DL_FTL + DL_ERR)
#define DBG_DEFAULT (DBG_MINIMUM + DL_XLOG + DL_REG)
extern void DIVA_DIDD_Read(void *, int);
static dword notify_handle;
static DESCRIPTOR DAdapter;
static DESCRIPTOR MAdapter;
static DESCRIPTOR MaintDescriptor =
{ IDI_DIMAINT, 0, 0, (IDI_CALL) diva_maint_prtComp };
extern int diva_os_copy_to_user(void *os_handle, void __user *dst,
const void *src, int length);
extern int diva_os_copy_from_user(void *os_handle, void *dst,
const void __user *src, int length);
static void no_printf(unsigned char *x, ...)
{
/* dummy debug function */
}
#include "debuglib.c"
/*
* DIDD callback function
*/
static void *didd_callback(void *context, DESCRIPTOR * adapter,
int removal)
{
if (adapter->type == IDI_DADAPTER) {
DBG_ERR(("cb: Change in DAdapter ? Oops ?."));
} else if (adapter->type == IDI_DIMAINT) {
if (removal) {
DbgDeregister();
memset(&MAdapter, 0, sizeof(MAdapter));
dprintf = no_printf;
} else {
memcpy(&MAdapter, adapter, sizeof(MAdapter));
dprintf = (DIVA_DI_PRINTF) MAdapter.request;
DbgRegister("MAINT", DRIVERRELEASE_MNT, DBG_DEFAULT);
}
} else if ((adapter->type > 0) && (adapter->type < 16)) {
if (removal) {
diva_mnt_remove_xdi_adapter(adapter);
} else {
diva_mnt_add_xdi_adapter(adapter);
}
}
return (NULL);
}
/*
* connect to didd
*/
static int DIVA_INIT_FUNCTION connect_didd(void)
{
int x = 0;
int dadapter = 0;
IDI_SYNC_REQ req;
DESCRIPTOR DIDD_Table[MAX_DESCRIPTORS];
DIVA_DIDD_Read(DIDD_Table, sizeof(DIDD_Table));
for (x = 0; x < MAX_DESCRIPTORS; x++) {
if (DIDD_Table[x].type == IDI_DADAPTER) { /* DADAPTER found */
dadapter = 1;
memcpy(&DAdapter, &DIDD_Table[x], sizeof(DAdapter));
req.didd_notify.e.Req = 0;
req.didd_notify.e.Rc =
IDI_SYNC_REQ_DIDD_REGISTER_ADAPTER_NOTIFY;
req.didd_notify.info.callback = (void *)didd_callback;
req.didd_notify.info.context = NULL;
DAdapter.request((ENTITY *) & req);
if (req.didd_notify.e.Rc != 0xff)
return (0);
notify_handle = req.didd_notify.info.handle;
/* Register MAINT (me) */
req.didd_add_adapter.e.Req = 0;
req.didd_add_adapter.e.Rc =
IDI_SYNC_REQ_DIDD_ADD_ADAPTER;
req.didd_add_adapter.info.descriptor =
(void *) &MaintDescriptor;
DAdapter.request((ENTITY *) & req);
if (req.didd_add_adapter.e.Rc != 0xff)
return (0);
} else if ((DIDD_Table[x].type > 0)
&& (DIDD_Table[x].type < 16)) {
diva_mnt_add_xdi_adapter(&DIDD_Table[x]);
}
}
return (dadapter);
}
/*
* disconnect from didd
*/
static void DIVA_EXIT_FUNCTION disconnect_didd(void)
{
IDI_SYNC_REQ req;
req.didd_notify.e.Req = 0;
req.didd_notify.e.Rc = IDI_SYNC_REQ_DIDD_REMOVE_ADAPTER_NOTIFY;
req.didd_notify.info.handle = notify_handle;
DAdapter.request((ENTITY *) & req);
req.didd_remove_adapter.e.Req = 0;
req.didd_remove_adapter.e.Rc = IDI_SYNC_REQ_DIDD_REMOVE_ADAPTER;
req.didd_remove_adapter.info.p_request =
(IDI_CALL) MaintDescriptor.request;
DAdapter.request((ENTITY *) & req);
}
/*
* read/write maint
*/
int maint_read_write(void __user *buf, int count)
{
byte data[128];
dword cmd, id, mask;
int ret = 0;
if (count < (3 * sizeof(dword)))
return (-EFAULT);
if (diva_os_copy_from_user(NULL, (void *) &data[0],
buf, 3 * sizeof(dword))) {
return (-EFAULT);
}
cmd = *(dword *) & data[0]; /* command */
id = *(dword *) & data[4]; /* driver id */
mask = *(dword *) & data[8]; /* mask or size */
switch (cmd) {
case DITRACE_CMD_GET_DRIVER_INFO:
if ((ret = diva_get_driver_info(id, data, sizeof(data))) > 0) {
if ((count < ret) || diva_os_copy_to_user
(NULL, buf, (void *) &data[0], ret))
ret = -EFAULT;
} else {
ret = -EINVAL;
}
break;
case DITRACE_READ_DRIVER_DBG_MASK:
if ((ret = diva_get_driver_dbg_mask(id, (byte *) data)) > 0) {
if ((count < ret) || diva_os_copy_to_user
(NULL, buf, (void *) &data[0], ret))
ret = -EFAULT;
} else {
ret = -ENODEV;
}
break;
case DITRACE_WRITE_DRIVER_DBG_MASK:
if ((ret = diva_set_driver_dbg_mask(id, mask)) <= 0) {
ret = -ENODEV;
}
break;
/*
Filter commands will ignore the ID due to fact that filtering affects
the B- channel and Audio Tap trace levels only. Also MAINT driver will
select the right trace ID by itself
*/
case DITRACE_WRITE_SELECTIVE_TRACE_FILTER:
if (!mask) {
ret = diva_set_trace_filter (1, "*");
} else if (mask < sizeof(data)) {
if (diva_os_copy_from_user(NULL, data, (char __user *)buf+12, mask)) {
ret = -EFAULT;
} else {
ret = diva_set_trace_filter ((int)mask, data);
}
} else {
ret = -EINVAL;
}
break;
case DITRACE_READ_SELECTIVE_TRACE_FILTER:
if ((ret = diva_get_trace_filter (sizeof(data), data)) > 0) {
if (diva_os_copy_to_user (NULL, buf, data, ret))
ret = -EFAULT;
} else {
ret = -ENODEV;
}
break;
case DITRACE_READ_TRACE_ENTRY:{
diva_os_spin_lock_magic_t old_irql;
word size;
diva_dbg_entry_head_t *pmsg;
byte *pbuf;
if (!(pbuf = diva_os_malloc(0, mask))) {
return (-ENOMEM);
}
for(;;) {
if (!(pmsg =
diva_maint_get_message(&size, &old_irql))) {
break;
}
if (size > mask) {
diva_maint_ack_message(0, &old_irql);
ret = -EINVAL;
break;
}
ret = size;
memcpy(pbuf, pmsg, size);
diva_maint_ack_message(1, &old_irql);
if ((count < size) ||
diva_os_copy_to_user (NULL, buf, (void *) pbuf, size))
ret = -EFAULT;
break;
}
diva_os_free(0, pbuf);
}
break;
case DITRACE_READ_TRACE_ENTRYS:{
diva_os_spin_lock_magic_t old_irql;
word size;
diva_dbg_entry_head_t *pmsg;
byte *pbuf = NULL;
int written = 0;
if (mask < 4096) {
ret = -EINVAL;
break;
}
if (!(pbuf = diva_os_malloc(0, mask))) {
return (-ENOMEM);
}
for (;;) {
if (!(pmsg =
diva_maint_get_message(&size, &old_irql))) {
break;
}
if ((size + 8) > mask) {
diva_maint_ack_message(0, &old_irql);
break;
}
/*
Write entry length
*/
pbuf[written++] = (byte) size;
pbuf[written++] = (byte) (size >> 8);
pbuf[written++] = 0;
pbuf[written++] = 0;
/*
Write message
*/
memcpy(&pbuf[written], pmsg, size);
diva_maint_ack_message(1, &old_irql);
written += size;
mask -= (size + 4);
}
pbuf[written++] = 0;
pbuf[written++] = 0;
pbuf[written++] = 0;
pbuf[written++] = 0;
if ((count < written) || diva_os_copy_to_user(NULL, buf, (void *) pbuf, written)) {
ret = -EFAULT;
} else {
ret = written;
}
diva_os_free(0, pbuf);
}
break;
default:
ret = -EINVAL;
}
return (ret);
}
/*
* init
*/
int DIVA_INIT_FUNCTION mntfunc_init(int *buffer_length, void **buffer,
unsigned long diva_dbg_mem)
{
if (*buffer_length < 64) {
*buffer_length = 64;
}
if (*buffer_length > 512) {
*buffer_length = 512;
}
*buffer_length *= 1024;
if (diva_dbg_mem) {
*buffer = (void *) diva_dbg_mem;
} else {
while ((*buffer_length >= (64 * 1024))
&&
(!(*buffer = diva_os_malloc (0, *buffer_length)))) {
*buffer_length -= 1024;
}
if (!*buffer) {
DBG_ERR(("init: Can not alloc trace buffer"));
return (0);
}
}
if (diva_maint_init(*buffer, *buffer_length, (diva_dbg_mem == 0))) {
if (!diva_dbg_mem) {
diva_os_free (0, *buffer);
}
DBG_ERR(("init: maint init failed"));
return (0);
}
if (!connect_didd()) {
DBG_ERR(("init: failed to connect to DIDD."));
diva_maint_finit();
if (!diva_dbg_mem) {
diva_os_free (0, *buffer);
}
return (0);
}
return (1);
}
/*
* exit
*/
void DIVA_EXIT_FUNCTION mntfunc_finit(void)
{
void *buffer;
int i = 100;
DbgDeregister();
while (diva_mnt_shutdown_xdi_adapters() && i--) {
diva_os_sleep(10);
}
disconnect_didd();
if ((buffer = diva_maint_finit())) {
diva_os_free (0, buffer);
}
memset(&MAdapter, 0, sizeof(MAdapter));
dprintf = no_printf;
}
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