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6038f373a3
linux_dsm_epyc7002/drivers/char/mwave/mwavedd.c
Arnd Bergmann 6038f373a3 llseek: automatically add .llseek fop 
All file_operations should get a .llseek operation so we can make
nonseekable_open the default for future file operations without a
.llseek pointer.

The three cases that we can automatically detect are no_llseek, seq_lseek
and default_llseek. For cases where we can we can automatically prove that
the file offset is always ignored, we use noop_llseek, which maintains
the current behavior of not returning an error from a seek.

New drivers should normally not use noop_llseek but instead use no_llseek
and call nonseekable_open at open time.  Existing drivers can be converted
to do the same when the maintainer knows for certain that no user code
relies on calling seek on the device file.

The generated code is often incorrectly indented and right now contains
comments that clarify for each added line why a specific variant was
chosen. In the version that gets submitted upstream, the comments will
be gone and I will manually fix the indentation, because there does not
seem to be a way to do that using coccinelle.

Some amount of new code is currently sitting in linux-next that should get
the same modifications, which I will do at the end of the merge window.

Many thanks to Julia Lawall for helping me learn to write a semantic
patch that does all this.

===== begin semantic patch =====
// This adds an llseek= method to all file operations,
// as a preparation for making no_llseek the default.
//
// The rules are
// - use no_llseek explicitly if we do nonseekable_open
// - use seq_lseek for sequential files
// - use default_llseek if we know we access f_pos
// - use noop_llseek if we know we don't access f_pos,
//   but we still want to allow users to call lseek
//
@ open1 exists @
identifier nested_open;
@@
nested_open(...)
{
<+...
nonseekable_open(...)
...+>
}

@ open exists@
identifier open_f;
identifier i, f;
identifier open1.nested_open;
@@
int open_f(struct inode *i, struct file *f)
{
<+...
(
nonseekable_open(...)
|
nested_open(...)
)
...+>
}

@ read disable optional_qualifier exists @
identifier read_f;
identifier f, p, s, off;
type ssize_t, size_t, loff_t;
expression E;
identifier func;
@@
ssize_t read_f(struct file *f, char *p, size_t s, loff_t *off)
{
<+...
(
   *off = E
|
   *off += E
|
   func(..., off, ...)
|
   E = *off
)
...+>
}

@ read_no_fpos disable optional_qualifier exists @
identifier read_f;
identifier f, p, s, off;
type ssize_t, size_t, loff_t;
@@
ssize_t read_f(struct file *f, char *p, size_t s, loff_t *off)
{
... when != off
}

@ write @
identifier write_f;
identifier f, p, s, off;
type ssize_t, size_t, loff_t;
expression E;
identifier func;
@@
ssize_t write_f(struct file *f, const char *p, size_t s, loff_t *off)
{
<+...
(
  *off = E
|
  *off += E
|
  func(..., off, ...)
|
  E = *off
)
...+>
}

@ write_no_fpos @
identifier write_f;
identifier f, p, s, off;
type ssize_t, size_t, loff_t;
@@
ssize_t write_f(struct file *f, const char *p, size_t s, loff_t *off)
{
... when != off
}

@ fops0 @
identifier fops;
@@
struct file_operations fops = {
 ...
};

@ has_llseek depends on fops0 @
identifier fops0.fops;
identifier llseek_f;
@@
struct file_operations fops = {
...
 .llseek = llseek_f,
...
};

@ has_read depends on fops0 @
identifier fops0.fops;
identifier read_f;
@@
struct file_operations fops = {
...
 .read = read_f,
...
};

@ has_write depends on fops0 @
identifier fops0.fops;
identifier write_f;
@@
struct file_operations fops = {
...
 .write = write_f,
...
};

@ has_open depends on fops0 @
identifier fops0.fops;
identifier open_f;
@@
struct file_operations fops = {
...
 .open = open_f,
...
};

// use no_llseek if we call nonseekable_open
////////////////////////////////////////////
@ nonseekable1 depends on !has_llseek && has_open @
identifier fops0.fops;
identifier nso ~= "nonseekable_open";
@@
struct file_operations fops = {
...  .open = nso, ...
+.llseek = no_llseek, /* nonseekable */
};

@ nonseekable2 depends on !has_llseek @
identifier fops0.fops;
identifier open.open_f;
@@
struct file_operations fops = {
...  .open = open_f, ...
+.llseek = no_llseek, /* open uses nonseekable */
};

// use seq_lseek for sequential files
/////////////////////////////////////
@ seq depends on !has_llseek @
identifier fops0.fops;
identifier sr ~= "seq_read";
@@
struct file_operations fops = {
...  .read = sr, ...
+.llseek = seq_lseek, /* we have seq_read */
};

// use default_llseek if there is a readdir
///////////////////////////////////////////
@ fops1 depends on !has_llseek && !nonseekable1 && !nonseekable2 && !seq @
identifier fops0.fops;
identifier readdir_e;
@@
// any other fop is used that changes pos
struct file_operations fops = {
... .readdir = readdir_e, ...
+.llseek = default_llseek, /* readdir is present */
};

// use default_llseek if at least one of read/write touches f_pos
/////////////////////////////////////////////////////////////////
@ fops2 depends on !fops1 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @
identifier fops0.fops;
identifier read.read_f;
@@
// read fops use offset
struct file_operations fops = {
... .read = read_f, ...
+.llseek = default_llseek, /* read accesses f_pos */
};

@ fops3 depends on !fops1 && !fops2 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @
identifier fops0.fops;
identifier write.write_f;
@@
// write fops use offset
struct file_operations fops = {
... .write = write_f, ...
+	.llseek = default_llseek, /* write accesses f_pos */
};

// Use noop_llseek if neither read nor write accesses f_pos
///////////////////////////////////////////////////////////

@ fops4 depends on !fops1 && !fops2 && !fops3 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @
identifier fops0.fops;
identifier read_no_fpos.read_f;
identifier write_no_fpos.write_f;
@@
// write fops use offset
struct file_operations fops = {
...
 .write = write_f,
 .read = read_f,
...
+.llseek = noop_llseek, /* read and write both use no f_pos */
};

@ depends on has_write && !has_read && !fops1 && !fops2 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @
identifier fops0.fops;
identifier write_no_fpos.write_f;
@@
struct file_operations fops = {
... .write = write_f, ...
+.llseek = noop_llseek, /* write uses no f_pos */
};

@ depends on has_read && !has_write && !fops1 && !fops2 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @
identifier fops0.fops;
identifier read_no_fpos.read_f;
@@
struct file_operations fops = {
... .read = read_f, ...
+.llseek = noop_llseek, /* read uses no f_pos */
};

@ depends on !has_read && !has_write && !fops1 && !fops2 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @
identifier fops0.fops;
@@
struct file_operations fops = {
...
+.llseek = noop_llseek, /* no read or write fn */
};
===== End semantic patch =====

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Julia Lawall <julia@diku.dk>
Cc: Christoph Hellwig <hch@infradead.org>
2010-10-15 15:53:27 +02:00

698 lines
18 KiB
C
Raw Blame History

/*
*
* mwavedd.c -- mwave device driver
*
*
* Written By: Mike Sullivan IBM Corporation
*
* Copyright (C) 1999 IBM Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* NO WARRANTY
* THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR
* CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT
* LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT,
* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is
* solely responsible for determining the appropriateness of using and
* distributing the Program and assumes all risks associated with its
* exercise of rights under this Agreement, including but not limited to
* the risks and costs of program errors, damage to or loss of data,
* programs or equipment, and unavailability or interruption of operations.
*
* DISCLAIMER OF LIABILITY
* NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
* USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED
* HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*
* 10/23/2000 - Alpha Release
* First release to the public
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/fs.h>
#include <linux/init.h>
#include <linux/major.h>
#include <linux/miscdevice.h>
#include <linux/device.h>
#include <linux/serial.h>
#include <linux/sched.h>
#include <linux/spinlock.h>
#include <linux/smp_lock.h>
#include <linux/delay.h>
#include <linux/serial_8250.h>
#include "smapi.h"
#include "mwavedd.h"
#include "3780i.h"
#include "tp3780i.h"
MODULE_DESCRIPTION("3780i Advanced Communications Processor (Mwave) driver");
MODULE_AUTHOR("Mike Sullivan and Paul Schroeder");
MODULE_LICENSE("GPL");
/*
* These parameters support the setting of MWave resources. Note that no
* checks are made against other devices (ie. superio) for conflicts.
* We'll depend on users using the tpctl utility to do that for now
*/
int mwave_debug = 0;
int mwave_3780i_irq = 0;
int mwave_3780i_io = 0;
int mwave_uart_irq = 0;
int mwave_uart_io = 0;
module_param(mwave_debug, int, 0);
module_param(mwave_3780i_irq, int, 0);
module_param(mwave_3780i_io, int, 0);
module_param(mwave_uart_irq, int, 0);
module_param(mwave_uart_io, int, 0);
static int mwave_open(struct inode *inode, struct file *file);
static int mwave_close(struct inode *inode, struct file *file);
static long mwave_ioctl(struct file *filp, unsigned int iocmd,
unsigned long ioarg);
MWAVE_DEVICE_DATA mwave_s_mdd;
static int mwave_open(struct inode *inode, struct file *file)
{
unsigned int retval = 0;
PRINTK_3(TRACE_MWAVE,
"mwavedd::mwave_open, entry inode %p file %p\n",
inode, file);
PRINTK_2(TRACE_MWAVE,
"mwavedd::mwave_open, exit return retval %x\n", retval);
cycle_kernel_lock();
return retval;
}
static int mwave_close(struct inode *inode, struct file *file)
{
unsigned int retval = 0;
PRINTK_3(TRACE_MWAVE,
"mwavedd::mwave_close, entry inode %p file %p\n",
inode, file);
PRINTK_2(TRACE_MWAVE, "mwavedd::mwave_close, exit retval %x\n",
retval);
return retval;
}
static long mwave_ioctl(struct file *file, unsigned int iocmd,
unsigned long ioarg)
{
unsigned int retval = 0;
pMWAVE_DEVICE_DATA pDrvData = &mwave_s_mdd;
void __user *arg = (void __user *)ioarg;
PRINTK_4(TRACE_MWAVE,
"mwavedd::mwave_ioctl, entry file %p cmd %x arg %x\n",
file, iocmd, (int) ioarg);
switch (iocmd) {
case IOCTL_MW_RESET:
PRINTK_1(TRACE_MWAVE,
"mwavedd::mwave_ioctl, IOCTL_MW_RESET"
" calling tp3780I_ResetDSP\n");
lock_kernel();
retval = tp3780I_ResetDSP(&pDrvData->rBDData);
unlock_kernel();
PRINTK_2(TRACE_MWAVE,
"mwavedd::mwave_ioctl, IOCTL_MW_RESET"
" retval %x from tp3780I_ResetDSP\n",
retval);
break;
case IOCTL_MW_RUN:
PRINTK_1(TRACE_MWAVE,
"mwavedd::mwave_ioctl, IOCTL_MW_RUN"
" calling tp3780I_StartDSP\n");
lock_kernel();
retval = tp3780I_StartDSP(&pDrvData->rBDData);
unlock_kernel();
PRINTK_2(TRACE_MWAVE,
"mwavedd::mwave_ioctl, IOCTL_MW_RUN"
" retval %x from tp3780I_StartDSP\n",
retval);
break;
case IOCTL_MW_DSP_ABILITIES: {
MW_ABILITIES rAbilities;
PRINTK_1(TRACE_MWAVE,
"mwavedd::mwave_ioctl,"
" IOCTL_MW_DSP_ABILITIES calling"
" tp3780I_QueryAbilities\n");
lock_kernel();
retval = tp3780I_QueryAbilities(&pDrvData->rBDData,
&rAbilities);
unlock_kernel();
PRINTK_2(TRACE_MWAVE,
"mwavedd::mwave_ioctl, IOCTL_MW_DSP_ABILITIES"
" retval %x from tp3780I_QueryAbilities\n",
retval);
if (retval == 0) {
if( copy_to_user(arg, &rAbilities,
sizeof(MW_ABILITIES)) )
return -EFAULT;
}
PRINTK_2(TRACE_MWAVE,
"mwavedd::mwave_ioctl, IOCTL_MW_DSP_ABILITIES"
" exit retval %x\n",
retval);
}
break;
case IOCTL_MW_READ_DATA:
case IOCTL_MW_READCLEAR_DATA: {
MW_READWRITE rReadData;
unsigned short __user *pusBuffer = NULL;
if( copy_from_user(&rReadData, arg,
sizeof(MW_READWRITE)) )
return -EFAULT;
pusBuffer = (unsigned short __user *) (rReadData.pBuf);
PRINTK_4(TRACE_MWAVE,
"mwavedd::mwave_ioctl IOCTL_MW_READ_DATA,"
" size %lx, ioarg %lx pusBuffer %p\n",
rReadData.ulDataLength, ioarg, pusBuffer);
lock_kernel();
retval = tp3780I_ReadWriteDspDStore(&pDrvData->rBDData,
iocmd,
pusBuffer,
rReadData.ulDataLength,
rReadData.usDspAddress);
unlock_kernel();
}
break;
case IOCTL_MW_READ_INST: {
MW_READWRITE rReadData;
unsigned short __user *pusBuffer = NULL;
if( copy_from_user(&rReadData, arg,
sizeof(MW_READWRITE)) )
return -EFAULT;
pusBuffer = (unsigned short __user *) (rReadData.pBuf);
PRINTK_4(TRACE_MWAVE,
"mwavedd::mwave_ioctl IOCTL_MW_READ_INST,"
" size %lx, ioarg %lx pusBuffer %p\n",
rReadData.ulDataLength / 2, ioarg,
pusBuffer);
lock_kernel();
retval = tp3780I_ReadWriteDspDStore(&pDrvData->rBDData,
iocmd, pusBuffer,
rReadData.ulDataLength / 2,
rReadData.usDspAddress);
unlock_kernel();
}
break;
case IOCTL_MW_WRITE_DATA: {
MW_READWRITE rWriteData;
unsigned short __user *pusBuffer = NULL;
if( copy_from_user(&rWriteData, arg,
sizeof(MW_READWRITE)) )
return -EFAULT;
pusBuffer = (unsigned short __user *) (rWriteData.pBuf);
PRINTK_4(TRACE_MWAVE,
"mwavedd::mwave_ioctl IOCTL_MW_WRITE_DATA,"
" size %lx, ioarg %lx pusBuffer %p\n",
rWriteData.ulDataLength, ioarg,
pusBuffer);
lock_kernel();
retval = tp3780I_ReadWriteDspDStore(&pDrvData->rBDData,
iocmd, pusBuffer,
rWriteData.ulDataLength,
rWriteData.usDspAddress);
unlock_kernel();
}
break;
case IOCTL_MW_WRITE_INST: {
MW_READWRITE rWriteData;
unsigned short __user *pusBuffer = NULL;
if( copy_from_user(&rWriteData, arg,
sizeof(MW_READWRITE)) )
return -EFAULT;
pusBuffer = (unsigned short __user *)(rWriteData.pBuf);
PRINTK_4(TRACE_MWAVE,
"mwavedd::mwave_ioctl IOCTL_MW_WRITE_INST,"
" size %lx, ioarg %lx pusBuffer %p\n",
rWriteData.ulDataLength, ioarg,
pusBuffer);
lock_kernel();
retval = tp3780I_ReadWriteDspIStore(&pDrvData->rBDData,
iocmd, pusBuffer,
rWriteData.ulDataLength,
rWriteData.usDspAddress);
unlock_kernel();
}
break;
case IOCTL_MW_REGISTER_IPC: {
unsigned int ipcnum = (unsigned int) ioarg;
if (ipcnum >= ARRAY_SIZE(pDrvData->IPCs)) {
PRINTK_ERROR(KERN_ERR_MWAVE
"mwavedd::mwave_ioctl:"
" IOCTL_MW_REGISTER_IPC:"
" Error: Invalid ipcnum %x\n",
ipcnum);
return -EINVAL;
}
PRINTK_3(TRACE_MWAVE,
"mwavedd::mwave_ioctl IOCTL_MW_REGISTER_IPC"
" ipcnum %x entry usIntCount %x\n",
ipcnum,
pDrvData->IPCs[ipcnum].usIntCount);
lock_kernel();
pDrvData->IPCs[ipcnum].bIsHere = FALSE;
pDrvData->IPCs[ipcnum].bIsEnabled = TRUE;
unlock_kernel();
PRINTK_2(TRACE_MWAVE,
"mwavedd::mwave_ioctl IOCTL_MW_REGISTER_IPC"
" ipcnum %x exit\n",
ipcnum);
}
break;
case IOCTL_MW_GET_IPC: {
unsigned int ipcnum = (unsigned int) ioarg;
if (ipcnum >= ARRAY_SIZE(pDrvData->IPCs)) {
PRINTK_ERROR(KERN_ERR_MWAVE
"mwavedd::mwave_ioctl:"
" IOCTL_MW_GET_IPC: Error:"
" Invalid ipcnum %x\n", ipcnum);
return -EINVAL;
}
PRINTK_3(TRACE_MWAVE,
"mwavedd::mwave_ioctl IOCTL_MW_GET_IPC"
" ipcnum %x, usIntCount %x\n",
ipcnum,
pDrvData->IPCs[ipcnum].usIntCount);
lock_kernel();
if (pDrvData->IPCs[ipcnum].bIsEnabled == TRUE) {
DECLARE_WAITQUEUE(wait, current);
PRINTK_2(TRACE_MWAVE,
"mwavedd::mwave_ioctl, thread for"
" ipc %x going to sleep\n",
ipcnum);
add_wait_queue(&pDrvData->IPCs[ipcnum].ipc_wait_queue, &wait);
pDrvData->IPCs[ipcnum].bIsHere = TRUE;
set_current_state(TASK_INTERRUPTIBLE);
/* check whether an event was signalled by */
/* the interrupt handler while we were gone */
if (pDrvData->IPCs[ipcnum].usIntCount == 1) { /* first int has occurred (race condition) */
pDrvData->IPCs[ipcnum].usIntCount = 2; /* first int has been handled */
PRINTK_2(TRACE_MWAVE,
"mwavedd::mwave_ioctl"
" IOCTL_MW_GET_IPC ipcnum %x"
" handling first int\n",
ipcnum);
} else { /* either 1st int has not yet occurred, or we have already handled the first int */
schedule();
if (pDrvData->IPCs[ipcnum].usIntCount == 1) {
pDrvData->IPCs[ipcnum].usIntCount = 2;
}
PRINTK_2(TRACE_MWAVE,
"mwavedd::mwave_ioctl"
" IOCTL_MW_GET_IPC ipcnum %x"
" woke up and returning to"
" application\n",
ipcnum);
}
pDrvData->IPCs[ipcnum].bIsHere = FALSE;
remove_wait_queue(&pDrvData->IPCs[ipcnum].ipc_wait_queue, &wait);
set_current_state(TASK_RUNNING);
PRINTK_2(TRACE_MWAVE,
"mwavedd::mwave_ioctl IOCTL_MW_GET_IPC,"
" returning thread for ipc %x"
" processing\n",
ipcnum);
}
unlock_kernel();
}
break;
case IOCTL_MW_UNREGISTER_IPC: {
unsigned int ipcnum = (unsigned int) ioarg;
PRINTK_2(TRACE_MWAVE,
"mwavedd::mwave_ioctl IOCTL_MW_UNREGISTER_IPC"
" ipcnum %x\n",
ipcnum);
if (ipcnum >= ARRAY_SIZE(pDrvData->IPCs)) {
PRINTK_ERROR(KERN_ERR_MWAVE
"mwavedd::mwave_ioctl:"
" IOCTL_MW_UNREGISTER_IPC:"
" Error: Invalid ipcnum %x\n",
ipcnum);
return -EINVAL;
}
lock_kernel();
if (pDrvData->IPCs[ipcnum].bIsEnabled == TRUE) {
pDrvData->IPCs[ipcnum].bIsEnabled = FALSE;
if (pDrvData->IPCs[ipcnum].bIsHere == TRUE) {
wake_up_interruptible(&pDrvData->IPCs[ipcnum].ipc_wait_queue);
}
}
unlock_kernel();
}
break;
default:
return -ENOTTY;
break;
} /* switch */
PRINTK_2(TRACE_MWAVE, "mwavedd::mwave_ioctl, exit retval %x\n", retval);
return retval;
}
static ssize_t mwave_read(struct file *file, char __user *buf, size_t count,
loff_t * ppos)
{
PRINTK_5(TRACE_MWAVE,
"mwavedd::mwave_read entry file %p, buf %p, count %zx ppos %p\n",
file, buf, count, ppos);
return -EINVAL;
}
static ssize_t mwave_write(struct file *file, const char __user *buf,
size_t count, loff_t * ppos)
{
PRINTK_5(TRACE_MWAVE,
"mwavedd::mwave_write entry file %p, buf %p,"
" count %zx ppos %p\n",
file, buf, count, ppos);
return -EINVAL;
}
static int register_serial_portandirq(unsigned int port, int irq)
{
struct uart_port uart;
switch ( port ) {
case 0x3f8:
case 0x2f8:
case 0x3e8:
case 0x2e8:
/* OK */
break;
default:
PRINTK_ERROR(KERN_ERR_MWAVE
"mwavedd::register_serial_portandirq:"
" Error: Illegal port %x\n", port );
return -1;
} /* switch */
/* port is okay */
switch ( irq ) {
case 3:
case 4:
case 5:
case 7:
/* OK */
break;
default:
PRINTK_ERROR(KERN_ERR_MWAVE
"mwavedd::register_serial_portandirq:"
" Error: Illegal irq %x\n", irq );
return -1;
} /* switch */
/* irq is okay */
memset(&uart, 0, sizeof(struct uart_port));
uart.uartclk = 1843200;
uart.iobase = port;
uart.irq = irq;
uart.iotype = UPIO_PORT;
uart.flags = UPF_SHARE_IRQ;
return serial8250_register_port(&uart);
}
static const struct file_operations mwave_fops = {
.owner = THIS_MODULE,
.read = mwave_read,
.write = mwave_write,
.unlocked_ioctl = mwave_ioctl,
.open = mwave_open,
.release = mwave_close,
.llseek = default_llseek,
};
static struct miscdevice mwave_misc_dev = { MWAVE_MINOR, "mwave", &mwave_fops };
#if 0 /* totally b0rked */
/*
* sysfs support <paulsch@us.ibm.com>
*/
struct device mwave_device;
/* Prevent code redundancy, create a macro for mwave_show_* functions. */
#define mwave_show_function(attr_name, format_string, field) \
static ssize_t mwave_show_##attr_name(struct device *dev, struct device_attribute *attr, char *buf) \
{ \
DSP_3780I_CONFIG_SETTINGS *pSettings = \
&mwave_s_mdd.rBDData.rDspSettings; \
return sprintf(buf, format_string, pSettings->field); \
}
/* All of our attributes are read attributes. */
#define mwave_dev_rd_attr(attr_name, format_string, field) \
mwave_show_function(attr_name, format_string, field) \
static DEVICE_ATTR(attr_name, S_IRUGO, mwave_show_##attr_name, NULL)
mwave_dev_rd_attr (3780i_dma, "%i\n", usDspDma);
mwave_dev_rd_attr (3780i_irq, "%i\n", usDspIrq);
mwave_dev_rd_attr (3780i_io, "%#.4x\n", usDspBaseIO);
mwave_dev_rd_attr (uart_irq, "%i\n", usUartIrq);
mwave_dev_rd_attr (uart_io, "%#.4x\n", usUartBaseIO);
static struct device_attribute * const mwave_dev_attrs[] = {
&dev_attr_3780i_dma,
&dev_attr_3780i_irq,
&dev_attr_3780i_io,
&dev_attr_uart_irq,
&dev_attr_uart_io,
};
#endif
/*
* mwave_init is called on module load
*
* mwave_exit is called on module unload
* mwave_exit is also used to clean up after an aborted mwave_init
*/
static void mwave_exit(void)
{
pMWAVE_DEVICE_DATA pDrvData = &mwave_s_mdd;
PRINTK_1(TRACE_MWAVE, "mwavedd::mwave_exit entry\n");
#if 0
for (i = 0; i < pDrvData->nr_registered_attrs; i++)
device_remove_file(&mwave_device, mwave_dev_attrs[i]);
pDrvData->nr_registered_attrs = 0;
if (pDrvData->device_registered) {
device_unregister(&mwave_device);
pDrvData->device_registered = FALSE;
}
#endif
if ( pDrvData->sLine >= 0 ) {
serial8250_unregister_port(pDrvData->sLine);
}
if (pDrvData->bMwaveDevRegistered) {
misc_deregister(&mwave_misc_dev);
}
if (pDrvData->bDSPEnabled) {
tp3780I_DisableDSP(&pDrvData->rBDData);
}
if (pDrvData->bResourcesClaimed) {
tp3780I_ReleaseResources(&pDrvData->rBDData);
}
if (pDrvData->bBDInitialized) {
tp3780I_Cleanup(&pDrvData->rBDData);
}
PRINTK_1(TRACE_MWAVE, "mwavedd::mwave_exit exit\n");
}
module_exit(mwave_exit);
static int __init mwave_init(void)
{
int i;
int retval = 0;
pMWAVE_DEVICE_DATA pDrvData = &mwave_s_mdd;
PRINTK_1(TRACE_MWAVE, "mwavedd::mwave_init entry\n");
memset(&mwave_s_mdd, 0, sizeof(MWAVE_DEVICE_DATA));
pDrvData->bBDInitialized = FALSE;
pDrvData->bResourcesClaimed = FALSE;
pDrvData->bDSPEnabled = FALSE;
pDrvData->bDSPReset = FALSE;
pDrvData->bMwaveDevRegistered = FALSE;
pDrvData->sLine = -1;
for (i = 0; i < ARRAY_SIZE(pDrvData->IPCs); i++) {
pDrvData->IPCs[i].bIsEnabled = FALSE;
pDrvData->IPCs[i].bIsHere = FALSE;
pDrvData->IPCs[i].usIntCount = 0; /* no ints received yet */
init_waitqueue_head(&pDrvData->IPCs[i].ipc_wait_queue);
}
retval = tp3780I_InitializeBoardData(&pDrvData->rBDData);
PRINTK_2(TRACE_MWAVE,
"mwavedd::mwave_init, return from tp3780I_InitializeBoardData"
" retval %x\n",
retval);
if (retval) {
PRINTK_ERROR(KERN_ERR_MWAVE
"mwavedd::mwave_init: Error:"
" Failed to initialize board data\n");
goto cleanup_error;
}
pDrvData->bBDInitialized = TRUE;
retval = tp3780I_CalcResources(&pDrvData->rBDData);
PRINTK_2(TRACE_MWAVE,
"mwavedd::mwave_init, return from tp3780I_CalcResources"
" retval %x\n",
retval);
if (retval) {
PRINTK_ERROR(KERN_ERR_MWAVE
"mwavedd:mwave_init: Error:"
" Failed to calculate resources\n");
goto cleanup_error;
}
retval = tp3780I_ClaimResources(&pDrvData->rBDData);
PRINTK_2(TRACE_MWAVE,
"mwavedd::mwave_init, return from tp3780I_ClaimResources"
" retval %x\n",
retval);
if (retval) {
PRINTK_ERROR(KERN_ERR_MWAVE
"mwavedd:mwave_init: Error:"
" Failed to claim resources\n");
goto cleanup_error;
}
pDrvData->bResourcesClaimed = TRUE;
retval = tp3780I_EnableDSP(&pDrvData->rBDData);
PRINTK_2(TRACE_MWAVE,
"mwavedd::mwave_init, return from tp3780I_EnableDSP"
" retval %x\n",
retval);
if (retval) {
PRINTK_ERROR(KERN_ERR_MWAVE
"mwavedd:mwave_init: Error:"
" Failed to enable DSP\n");
goto cleanup_error;
}
pDrvData->bDSPEnabled = TRUE;
if (misc_register(&mwave_misc_dev) < 0) {
PRINTK_ERROR(KERN_ERR_MWAVE
"mwavedd:mwave_init: Error:"
" Failed to register misc device\n");
goto cleanup_error;
}
pDrvData->bMwaveDevRegistered = TRUE;
pDrvData->sLine = register_serial_portandirq(
pDrvData->rBDData.rDspSettings.usUartBaseIO,
pDrvData->rBDData.rDspSettings.usUartIrq
);
if (pDrvData->sLine < 0) {
PRINTK_ERROR(KERN_ERR_MWAVE
"mwavedd:mwave_init: Error:"
" Failed to register serial driver\n");
goto cleanup_error;
}
/* uart is registered */
#if 0
/* sysfs */
memset(&mwave_device, 0, sizeof (struct device));
dev_set_name(&mwave_device, "mwave");
if (device_register(&mwave_device))
goto cleanup_error;
pDrvData->device_registered = TRUE;
for (i = 0; i < ARRAY_SIZE(mwave_dev_attrs); i++) {
if(device_create_file(&mwave_device, mwave_dev_attrs[i])) {
PRINTK_ERROR(KERN_ERR_MWAVE
"mwavedd:mwave_init: Error:"
" Failed to create sysfs file %s\n",
mwave_dev_attrs[i]->attr.name);
goto cleanup_error;
}
pDrvData->nr_registered_attrs++;
}
#endif
/* SUCCESS! */
return 0;
cleanup_error:
PRINTK_ERROR(KERN_ERR_MWAVE
"mwavedd::mwave_init: Error:"
" Failed to initialize\n");
mwave_exit(); /* clean up */
return -EIO;
}
module_init(mwave_init);
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