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alistair23-linux/drivers/char/dsp56k.c
Tim Schmielau cd354f1ae7 [PATCH] remove many unneeded #includes of sched.h 
After Al Viro (finally) succeeded in removing the sched.h #include in module.h
recently, it makes sense again to remove other superfluous sched.h includes.
There are quite a lot of files which include it but don't actually need
anything defined in there.  Presumably these includes were once needed for
macros that used to live in sched.h, but moved to other header files in the
course of cleaning it up.

To ease the pain, this time I did not fiddle with any header files and only
removed #includes from .c-files, which tend to cause less trouble.

Compile tested against 2.6.20-rc2 and 2.6.20-rc2-mm2 (with offsets) on alpha,
arm, i386, ia64, mips, powerpc, and x86_64 with allnoconfig, defconfig,
allmodconfig, and allyesconfig as well as a few randconfigs on x86_64 and all
configs in arch/arm/configs on arm.  I also checked that no new warnings were
introduced by the patch (actually, some warnings are removed that were emitted
by unnecessarily included header files).

Signed-off-by: Tim Schmielau <tim@physik3.uni-rostock.de>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-02-14 08:09:54 -08:00

538 lines
13 KiB
C
Raw Blame History

/*
* The DSP56001 Device Driver, saviour of the Free World(tm)
*
* Authors: Fredrik Noring <noring@nocrew.org>
* lars brinkhoff <lars@nocrew.org>
* Tomas Berndtsson <tomas@nocrew.org>
*
* First version May 1996
*
* History:
* 97-01-29 Tomas Berndtsson,
* Integrated with Linux 2.1.21 kernel sources.
* 97-02-15 Tomas Berndtsson,
* Fixed for kernel 2.1.26
*
* BUGS:
* Hmm... there must be something here :)
*
* Copyright (C) 1996,1997 Fredrik Noring, lars brinkhoff & Tomas Berndtsson
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file COPYING in the main directory of this archive
* for more details.
*/
#include <linux/module.h>
#include <linux/slab.h> /* for kmalloc() and kfree() */
#include <linux/major.h>
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/delay.h> /* guess what */
#include <linux/fs.h>
#include <linux/mm.h>
#include <linux/init.h>
#include <linux/smp_lock.h>
#include <linux/device.h>
#include <asm/atarihw.h>
#include <asm/traps.h>
#include <asm/uaccess.h> /* For put_user and get_user */
#include <asm/dsp56k.h>
/* minor devices */
#define DSP56K_DEV_56001 0 /* The only device so far */
#define TIMEOUT 10 /* Host port timeout in number of tries */
#define MAXIO 2048 /* Maximum number of words before sleep */
#define DSP56K_MAX_BINARY_LENGTH (3*64*1024)
#define DSP56K_TX_INT_ON dsp56k_host_interface.icr |= DSP56K_ICR_TREQ
#define DSP56K_RX_INT_ON dsp56k_host_interface.icr |= DSP56K_ICR_RREQ
#define DSP56K_TX_INT_OFF dsp56k_host_interface.icr &= ~DSP56K_ICR_TREQ
#define DSP56K_RX_INT_OFF dsp56k_host_interface.icr &= ~DSP56K_ICR_RREQ
#define DSP56K_TRANSMIT (dsp56k_host_interface.isr & DSP56K_ISR_TXDE)
#define DSP56K_RECEIVE (dsp56k_host_interface.isr & DSP56K_ISR_RXDF)
#define handshake(count, maxio, timeout, ENABLE, f) \
{ \
long i, t, m; \
while (count > 0) { \
m = min_t(unsigned long, count, maxio); \
for (i = 0; i < m; i++) { \
for (t = 0; t < timeout && !ENABLE; t++) \
msleep(20); \
if(!ENABLE) \
return -EIO; \
f; \
} \
count -= m; \
if (m == maxio) msleep(20); \
} \
}
#define tx_wait(n) \
{ \
int t; \
for(t = 0; t < n && !DSP56K_TRANSMIT; t++) \
msleep(10); \
if(!DSP56K_TRANSMIT) { \
return -EIO; \
} \
}
#define rx_wait(n) \
{ \
int t; \
for(t = 0; t < n && !DSP56K_RECEIVE; t++) \
msleep(10); \
if(!DSP56K_RECEIVE) { \
return -EIO; \
} \
}
/* DSP56001 bootstrap code */
static char bootstrap[] = {
0x0c, 0x00, 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x60, 0xf4, 0x00, 0x00, 0x00, 0x4f, 0x61, 0xf4,
0x00, 0x00, 0x7e, 0xa9, 0x06, 0x2e, 0x80, 0x00, 0x00, 0x47,
0x07, 0xd8, 0x84, 0x07, 0x59, 0x84, 0x08, 0xf4, 0xa8, 0x00,
0x00, 0x04, 0x08, 0xf4, 0xbf, 0x00, 0x0c, 0x00, 0x00, 0xfe,
0xb8, 0x0a, 0xf0, 0x80, 0x00, 0x7e, 0xa9, 0x08, 0xf4, 0xa0,
0x00, 0x00, 0x01, 0x08, 0xf4, 0xbe, 0x00, 0x00, 0x00, 0x0a,
0xa9, 0x80, 0x00, 0x7e, 0xad, 0x08, 0x4e, 0x2b, 0x44, 0xf4,
0x00, 0x00, 0x00, 0x03, 0x44, 0xf4, 0x45, 0x00, 0x00, 0x01,
0x0e, 0xa0, 0x00, 0x0a, 0xa9, 0x80, 0x00, 0x7e, 0xb5, 0x08,
0x50, 0x2b, 0x0a, 0xa9, 0x80, 0x00, 0x7e, 0xb8, 0x08, 0x46,
0x2b, 0x44, 0xf4, 0x45, 0x00, 0x00, 0x02, 0x0a, 0xf0, 0xaa,
0x00, 0x7e, 0xc9, 0x20, 0x00, 0x45, 0x0a, 0xf0, 0xaa, 0x00,
0x7e, 0xd0, 0x06, 0xc6, 0x00, 0x00, 0x7e, 0xc6, 0x0a, 0xa9,
0x80, 0x00, 0x7e, 0xc4, 0x08, 0x58, 0x6b, 0x0a, 0xf0, 0x80,
0x00, 0x7e, 0xad, 0x06, 0xc6, 0x00, 0x00, 0x7e, 0xcd, 0x0a,
0xa9, 0x80, 0x00, 0x7e, 0xcb, 0x08, 0x58, 0xab, 0x0a, 0xf0,
0x80, 0x00, 0x7e, 0xad, 0x06, 0xc6, 0x00, 0x00, 0x7e, 0xd4,
0x0a, 0xa9, 0x80, 0x00, 0x7e, 0xd2, 0x08, 0x58, 0xeb, 0x0a,
0xf0, 0x80, 0x00, 0x7e, 0xad};
static int sizeof_bootstrap = 375;
static struct dsp56k_device {
long in_use;
long maxio, timeout;
int tx_wsize, rx_wsize;
} dsp56k;
static struct class *dsp56k_class;
static int dsp56k_reset(void)
{
u_char status;
/* Power down the DSP */
sound_ym.rd_data_reg_sel = 14;
status = sound_ym.rd_data_reg_sel & 0xef;
sound_ym.wd_data = status;
sound_ym.wd_data = status | 0x10;
udelay(10);
/* Power up the DSP */
sound_ym.rd_data_reg_sel = 14;
sound_ym.wd_data = sound_ym.rd_data_reg_sel & 0xef;
return 0;
}
static int dsp56k_upload(u_char __user *bin, int len)
{
int i;
u_char *p;
dsp56k_reset();
p = bootstrap;
for (i = 0; i < sizeof_bootstrap/3; i++) {
/* tx_wait(10); */
dsp56k_host_interface.data.b[1] = *p++;
dsp56k_host_interface.data.b[2] = *p++;
dsp56k_host_interface.data.b[3] = *p++;
}
for (; i < 512; i++) {
/* tx_wait(10); */
dsp56k_host_interface.data.b[1] = 0;
dsp56k_host_interface.data.b[2] = 0;
dsp56k_host_interface.data.b[3] = 0;
}
for (i = 0; i < len; i++) {
tx_wait(10);
get_user(dsp56k_host_interface.data.b[1], bin++);
get_user(dsp56k_host_interface.data.b[2], bin++);
get_user(dsp56k_host_interface.data.b[3], bin++);
}
tx_wait(10);
dsp56k_host_interface.data.l = 3; /* Magic execute */
return 0;
}
static ssize_t dsp56k_read(struct file *file, char __user *buf, size_t count,
loff_t *ppos)
{
struct inode *inode = file->f_path.dentry->d_inode;
int dev = iminor(inode) & 0x0f;
switch(dev)
{
case DSP56K_DEV_56001:
{
long n;
/* Don't do anything if nothing is to be done */
if (!count) return 0;
n = 0;
switch (dsp56k.rx_wsize) {
case 1: /* 8 bit */
{
handshake(count, dsp56k.maxio, dsp56k.timeout, DSP56K_RECEIVE,
put_user(dsp56k_host_interface.data.b[3], buf+n++));
return n;
}
case 2: /* 16 bit */
{
short __user *data;
count /= 2;
data = (short __user *) buf;
handshake(count, dsp56k.maxio, dsp56k.timeout, DSP56K_RECEIVE,
put_user(dsp56k_host_interface.data.w[1], data+n++));
return 2*n;
}
case 3: /* 24 bit */
{
count /= 3;
handshake(count, dsp56k.maxio, dsp56k.timeout, DSP56K_RECEIVE,
put_user(dsp56k_host_interface.data.b[1], buf+n++);
put_user(dsp56k_host_interface.data.b[2], buf+n++);
put_user(dsp56k_host_interface.data.b[3], buf+n++));
return 3*n;
}
case 4: /* 32 bit */
{
long __user *data;
count /= 4;
data = (long __user *) buf;
handshake(count, dsp56k.maxio, dsp56k.timeout, DSP56K_RECEIVE,
put_user(dsp56k_host_interface.data.l, data+n++));
return 4*n;
}
}
return -EFAULT;
}
default:
printk(KERN_ERR "DSP56k driver: Unknown minor device: %d\n", dev);
return -ENXIO;
}
}
static ssize_t dsp56k_write(struct file *file, const char __user *buf, size_t count,
loff_t *ppos)
{
struct inode *inode = file->f_path.dentry->d_inode;
int dev = iminor(inode) & 0x0f;
switch(dev)
{
case DSP56K_DEV_56001:
{
long n;
/* Don't do anything if nothing is to be done */
if (!count) return 0;
n = 0;
switch (dsp56k.tx_wsize) {
case 1: /* 8 bit */
{
handshake(count, dsp56k.maxio, dsp56k.timeout, DSP56K_TRANSMIT,
get_user(dsp56k_host_interface.data.b[3], buf+n++));
return n;
}
case 2: /* 16 bit */
{
const short __user *data;
count /= 2;
data = (const short __user *)buf;
handshake(count, dsp56k.maxio, dsp56k.timeout, DSP56K_TRANSMIT,
get_user(dsp56k_host_interface.data.w[1], data+n++));
return 2*n;
}
case 3: /* 24 bit */
{
count /= 3;
handshake(count, dsp56k.maxio, dsp56k.timeout, DSP56K_TRANSMIT,
get_user(dsp56k_host_interface.data.b[1], buf+n++);
get_user(dsp56k_host_interface.data.b[2], buf+n++);
get_user(dsp56k_host_interface.data.b[3], buf+n++));
return 3*n;
}
case 4: /* 32 bit */
{
const long __user *data;
count /= 4;
data = (const long __user *)buf;
handshake(count, dsp56k.maxio, dsp56k.timeout, DSP56K_TRANSMIT,
get_user(dsp56k_host_interface.data.l, data+n++));
return 4*n;
}
}
return -EFAULT;
}
default:
printk(KERN_ERR "DSP56k driver: Unknown minor device: %d\n", dev);
return -ENXIO;
}
}
static int dsp56k_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
int dev = iminor(inode) & 0x0f;
void __user *argp = (void __user *)arg;
switch(dev)
{
case DSP56K_DEV_56001:
switch(cmd) {
case DSP56K_UPLOAD:
{
char __user *bin;
int r, len;
struct dsp56k_upload __user *binary = argp;
if(get_user(len, &binary->len) < 0)
return -EFAULT;
if(get_user(bin, &binary->bin) < 0)
return -EFAULT;
if (len == 0) {
return -EINVAL; /* nothing to upload?!? */
}
if (len > DSP56K_MAX_BINARY_LENGTH) {
return -EINVAL;
}
r = dsp56k_upload(bin, len);
if (r < 0) {
return r;
}
break;
}
case DSP56K_SET_TX_WSIZE:
if (arg > 4 || arg < 1)
return -EINVAL;
dsp56k.tx_wsize = (int) arg;
break;
case DSP56K_SET_RX_WSIZE:
if (arg > 4 || arg < 1)
return -EINVAL;
dsp56k.rx_wsize = (int) arg;
break;
case DSP56K_HOST_FLAGS:
{
int dir, out, status;
struct dsp56k_host_flags __user *hf = argp;
if(get_user(dir, &hf->dir) < 0)
return -EFAULT;
if(get_user(out, &hf->out) < 0)
return -EFAULT;
if ((dir & 0x1) && (out & 0x1))
dsp56k_host_interface.icr |= DSP56K_ICR_HF0;
else if (dir & 0x1)
dsp56k_host_interface.icr &= ~DSP56K_ICR_HF0;
if ((dir & 0x2) && (out & 0x2))
dsp56k_host_interface.icr |= DSP56K_ICR_HF1;
else if (dir & 0x2)
dsp56k_host_interface.icr &= ~DSP56K_ICR_HF1;
status = 0;
if (dsp56k_host_interface.icr & DSP56K_ICR_HF0) status |= 0x1;
if (dsp56k_host_interface.icr & DSP56K_ICR_HF1) status |= 0x2;
if (dsp56k_host_interface.isr & DSP56K_ISR_HF2) status |= 0x4;
if (dsp56k_host_interface.isr & DSP56K_ISR_HF3) status |= 0x8;
return put_user(status, &hf->status);
}
case DSP56K_HOST_CMD:
if (arg > 31 || arg < 0)
return -EINVAL;
dsp56k_host_interface.cvr = (u_char)((arg & DSP56K_CVR_HV_MASK) |
DSP56K_CVR_HC);
break;
default:
return -EINVAL;
}
return 0;
default:
printk(KERN_ERR "DSP56k driver: Unknown minor device: %d\n", dev);
return -ENXIO;
}
}
/* As of 2.1.26 this should be dsp56k_poll,
* but how do I then check device minor number?
* Do I need this function at all???
*/
#if 0
static unsigned int dsp56k_poll(struct file *file, poll_table *wait)
{
int dev = iminor(file->f_path.dentry->d_inode) & 0x0f;
switch(dev)
{
case DSP56K_DEV_56001:
/* poll_wait(file, ???, wait); */
return POLLIN | POLLRDNORM | POLLOUT;
default:
printk("DSP56k driver: Unknown minor device: %d\n", dev);
return 0;
}
}
#endif
static int dsp56k_open(struct inode *inode, struct file *file)
{
int dev = iminor(inode) & 0x0f;
switch(dev)
{
case DSP56K_DEV_56001:
if (test_and_set_bit(0, &dsp56k.in_use))
return -EBUSY;
dsp56k.timeout = TIMEOUT;
dsp56k.maxio = MAXIO;
dsp56k.rx_wsize = dsp56k.tx_wsize = 4;
DSP56K_TX_INT_OFF;
DSP56K_RX_INT_OFF;
/* Zero host flags */
dsp56k_host_interface.icr &= ~DSP56K_ICR_HF0;
dsp56k_host_interface.icr &= ~DSP56K_ICR_HF1;
break;
default:
return -ENODEV;
}
return 0;
}
static int dsp56k_release(struct inode *inode, struct file *file)
{
int dev = iminor(inode) & 0x0f;
switch(dev)
{
case DSP56K_DEV_56001:
clear_bit(0, &dsp56k.in_use);
break;
default:
printk(KERN_ERR "DSP56k driver: Unknown minor device: %d\n", dev);
return -ENXIO;
}
return 0;
}
static const struct file_operations dsp56k_fops = {
.owner = THIS_MODULE,
.read = dsp56k_read,
.write = dsp56k_write,
.ioctl = dsp56k_ioctl,
.open = dsp56k_open,
.release = dsp56k_release,
};
/****** Init and module functions ******/
static char banner[] __initdata = KERN_INFO "DSP56k driver installed\n";
static int __init dsp56k_init_driver(void)
{
int err = 0;
if(!MACH_IS_ATARI || !ATARIHW_PRESENT(DSP56K)) {
printk("DSP56k driver: Hardware not present\n");
return -ENODEV;
}
if(register_chrdev(DSP56K_MAJOR, "dsp56k", &dsp56k_fops)) {
printk("DSP56k driver: Unable to register driver\n");
return -ENODEV;
}
dsp56k_class = class_create(THIS_MODULE, "dsp56k");
if (IS_ERR(dsp56k_class)) {
err = PTR_ERR(dsp56k_class);
goto out_chrdev;
}
class_device_create(dsp56k_class, NULL, MKDEV(DSP56K_MAJOR, 0), NULL, "dsp56k");
printk(banner);
goto out;
out_chrdev:
unregister_chrdev(DSP56K_MAJOR, "dsp56k");
out:
return err;
}
module_init(dsp56k_init_driver);
static void __exit dsp56k_cleanup_driver(void)
{
class_device_destroy(dsp56k_class, MKDEV(DSP56K_MAJOR, 0));
class_destroy(dsp56k_class);
unregister_chrdev(DSP56K_MAJOR, "dsp56k");
}
module_exit(dsp56k_cleanup_driver);
MODULE_LICENSE("GPL");
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