mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-25 03:10:52 +07:00
535 lines
12 KiB
C
535 lines
12 KiB
C
/*
|
|
* 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/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/device.h>
|
|
#include <linux/mutex.h>
|
|
#include <linux/firmware.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/uaccess.h> /* For put_user and get_user */
|
|
|
|
#include <asm/atarihw.h>
|
|
#include <asm/traps.h>
|
|
|
|
#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; \
|
|
} \
|
|
}
|
|
|
|
static DEFINE_MUTEX(dsp56k_mutex);
|
|
static struct dsp56k_device {
|
|
unsigned 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)
|
|
{
|
|
struct platform_device *pdev;
|
|
const struct firmware *fw;
|
|
const char fw_name[] = "dsp56k/bootstrap.bin";
|
|
int err;
|
|
int i;
|
|
|
|
dsp56k_reset();
|
|
|
|
pdev = platform_device_register_simple("dsp56k", 0, NULL, 0);
|
|
if (IS_ERR(pdev)) {
|
|
printk(KERN_ERR "Failed to register device for \"%s\"\n",
|
|
fw_name);
|
|
return -EINVAL;
|
|
}
|
|
err = request_firmware(&fw, fw_name, &pdev->dev);
|
|
platform_device_unregister(pdev);
|
|
if (err) {
|
|
printk(KERN_ERR "Failed to load image \"%s\" err %d\n",
|
|
fw_name, err);
|
|
return err;
|
|
}
|
|
if (fw->size % 3) {
|
|
printk(KERN_ERR "Bogus length %d in image \"%s\"\n",
|
|
fw->size, fw_name);
|
|
release_firmware(fw);
|
|
return -EINVAL;
|
|
}
|
|
for (i = 0; i < fw->size; i = i + 3) {
|
|
/* tx_wait(10); */
|
|
dsp56k_host_interface.data.b[1] = fw->data[i];
|
|
dsp56k_host_interface.data.b[2] = fw->data[i + 1];
|
|
dsp56k_host_interface.data.b[3] = fw->data[i + 2];
|
|
}
|
|
release_firmware(fw);
|
|
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_inode(file);
|
|
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_inode(file);
|
|
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 long dsp56k_ioctl(struct file *file, unsigned int cmd,
|
|
unsigned long arg)
|
|
{
|
|
int dev = iminor(file_inode(file)) & 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;
|
|
}
|
|
mutex_lock(&dsp56k_mutex);
|
|
r = dsp56k_upload(bin, len);
|
|
mutex_unlock(&dsp56k_mutex);
|
|
if (r < 0) {
|
|
return r;
|
|
}
|
|
|
|
break;
|
|
}
|
|
case DSP56K_SET_TX_WSIZE:
|
|
if (arg > 4 || arg < 1)
|
|
return -EINVAL;
|
|
mutex_lock(&dsp56k_mutex);
|
|
dsp56k.tx_wsize = (int) arg;
|
|
mutex_unlock(&dsp56k_mutex);
|
|
break;
|
|
case DSP56K_SET_RX_WSIZE:
|
|
if (arg > 4 || arg < 1)
|
|
return -EINVAL;
|
|
mutex_lock(&dsp56k_mutex);
|
|
dsp56k.rx_wsize = (int) arg;
|
|
mutex_unlock(&dsp56k_mutex);
|
|
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;
|
|
|
|
mutex_lock(&dsp56k_mutex);
|
|
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;
|
|
mutex_unlock(&dsp56k_mutex);
|
|
return put_user(status, &hf->status);
|
|
}
|
|
case DSP56K_HOST_CMD:
|
|
if (arg > 31 || arg < 0)
|
|
return -EINVAL;
|
|
mutex_lock(&dsp56k_mutex);
|
|
dsp56k_host_interface.cvr = (u_char)((arg & DSP56K_CVR_HV_MASK) |
|
|
DSP56K_CVR_HC);
|
|
mutex_unlock(&dsp56k_mutex);
|
|
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_inode(file)) & 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;
|
|
int ret = 0;
|
|
|
|
mutex_lock(&dsp56k_mutex);
|
|
switch(dev)
|
|
{
|
|
case DSP56K_DEV_56001:
|
|
|
|
if (test_and_set_bit(0, &dsp56k.in_use)) {
|
|
ret = -EBUSY;
|
|
goto out;
|
|
}
|
|
|
|
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:
|
|
ret = -ENODEV;
|
|
}
|
|
out:
|
|
mutex_unlock(&dsp56k_mutex);
|
|
return ret;
|
|
}
|
|
|
|
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,
|
|
.unlocked_ioctl = dsp56k_ioctl,
|
|
.open = dsp56k_open,
|
|
.release = dsp56k_release,
|
|
.llseek = noop_llseek,
|
|
};
|
|
|
|
|
|
/****** 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;
|
|
}
|
|
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)
|
|
{
|
|
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");
|
|
MODULE_FIRMWARE("dsp56k/bootstrap.bin");
|