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path: root/drivers/char/dsp56k.c
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Diffstat (limited to 'drivers/char/dsp56k.c')
-rw-r--r--drivers/char/dsp56k.c181
1 files changed, 84 insertions, 97 deletions
diff --git a/drivers/char/dsp56k.c b/drivers/char/dsp56k.c
index 8693835cb2d..01a5ca7425d 100644
--- a/drivers/char/dsp56k.c
+++ b/drivers/char/dsp56k.c
@@ -24,8 +24,6 @@
*/
#include <linux/module.h>
-#include <linux/slab.h> /* for kmalloc() and kfree() */
-#include <linux/sched.h> /* for struct wait_queue etc */
#include <linux/major.h>
#include <linux/types.h>
#include <linux/errno.h>
@@ -33,13 +31,14 @@
#include <linux/fs.h>
#include <linux/mm.h>
#include <linux/init.h>
-#include <linux/devfs_fs_kernel.h>
-#include <linux/smp_lock.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/uaccess.h> /* For put_user and get_user */
#include <asm/dsp56k.h>
@@ -95,51 +94,9 @@
} \
}
-/* 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 DEFINE_MUTEX(dsp56k_mutex);
static struct dsp56k_device {
- long in_use;
+ unsigned long in_use;
long maxio, timeout;
int tx_wsize, rx_wsize;
} dsp56k;
@@ -165,20 +122,42 @@ static int dsp56k_reset(void)
return 0;
}
-static int dsp56k_upload(u_char *bin, int len)
+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;
- u_char *p;
-
+
dsp56k_reset();
-
- p = bootstrap;
- for (i = 0; i < sizeof_bootstrap/3; i++) {
+
+ 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] = *p++;
- dsp56k_host_interface.data.b[2] = *p++;
- dsp56k_host_interface.data.b[3] = *p++;
+ 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;
@@ -199,10 +178,10 @@ static int dsp56k_upload(u_char *bin, int len)
return 0;
}
-static ssize_t dsp56k_read(struct file *file, char *buf, size_t count,
+static ssize_t dsp56k_read(struct file *file, char __user *buf, size_t count,
loff_t *ppos)
{
- struct inode *inode = file->f_dentry->d_inode;
+ struct inode *inode = file_inode(file);
int dev = iminor(inode) & 0x0f;
switch(dev)
@@ -225,10 +204,10 @@ static ssize_t dsp56k_read(struct file *file, char *buf, size_t count,
}
case 2: /* 16 bit */
{
- short *data;
+ short __user *data;
count /= 2;
- data = (short*) buf;
+ 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;
@@ -244,10 +223,10 @@ static ssize_t dsp56k_read(struct file *file, char *buf, size_t count,
}
case 4: /* 32 bit */
{
- long *data;
+ long __user *data;
count /= 4;
- data = (long*) buf;
+ data = (long __user *) buf;
handshake(count, dsp56k.maxio, dsp56k.timeout, DSP56K_RECEIVE,
put_user(dsp56k_host_interface.data.l, data+n++));
return 4*n;
@@ -262,10 +241,10 @@ static ssize_t dsp56k_read(struct file *file, char *buf, size_t count,
}
}
-static ssize_t dsp56k_write(struct file *file, const char *buf, size_t count,
+static ssize_t dsp56k_write(struct file *file, const char __user *buf, size_t count,
loff_t *ppos)
{
- struct inode *inode = file->f_dentry->d_inode;
+ struct inode *inode = file_inode(file);
int dev = iminor(inode) & 0x0f;
switch(dev)
@@ -287,10 +266,10 @@ static ssize_t dsp56k_write(struct file *file, const char *buf, size_t count,
}
case 2: /* 16 bit */
{
- const short *data;
+ const short __user *data;
count /= 2;
- data = (const short *)buf;
+ 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;
@@ -306,10 +285,10 @@ static ssize_t dsp56k_write(struct file *file, const char *buf, size_t count,
}
case 4: /* 32 bit */
{
- const long *data;
+ const long __user *data;
count /= 4;
- data = (const long *)buf;
+ 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;
@@ -324,10 +303,11 @@ static ssize_t dsp56k_write(struct file *file, const char *buf, size_t count,
}
}
-static int dsp56k_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
+static long dsp56k_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg)
{
- int dev = iminor(inode) & 0x0f;
+ int dev = iminor(file_inode(file)) & 0x0f;
+ void __user *argp = (void __user *)arg;
switch(dev)
{
@@ -336,9 +316,9 @@ static int dsp56k_ioctl(struct inode *inode, struct file *file,
switch(cmd) {
case DSP56K_UPLOAD:
{
- char *bin;
+ char __user *bin;
int r, len;
- struct dsp56k_upload *binary = (struct dsp56k_upload *) arg;
+ struct dsp56k_upload __user *binary = argp;
if(get_user(len, &binary->len) < 0)
return -EFAULT;
@@ -351,8 +331,9 @@ static int dsp56k_ioctl(struct inode *inode, struct file *file,
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;
}
@@ -362,23 +343,28 @@ static int dsp56k_ioctl(struct inode *inode, struct file *file,
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 *hf = (struct dsp56k_host_flags*) arg;
+ 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)
@@ -393,14 +379,16 @@ static int dsp56k_ioctl(struct inode *inode, struct file *file,
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;
@@ -420,7 +408,7 @@ static int dsp56k_ioctl(struct inode *inode, struct file *file,
#if 0
static unsigned int dsp56k_poll(struct file *file, poll_table *wait)
{
- int dev = iminor(file->f_dentry->d_inode) & 0x0f;
+ int dev = iminor(file_inode(file)) & 0x0f;
switch(dev)
{
@@ -438,13 +426,17 @@ static unsigned int dsp56k_poll(struct file *file, poll_table *wait)
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))
- return -EBUSY;
+ if (test_and_set_bit(0, &dsp56k.in_use)) {
+ ret = -EBUSY;
+ goto out;
+ }
dsp56k.timeout = TIMEOUT;
dsp56k.maxio = MAXIO;
@@ -460,10 +452,11 @@ static int dsp56k_open(struct inode *inode, struct file *file)
break;
default:
- return -ENODEV;
+ ret = -ENODEV;
}
-
- return 0;
+out:
+ mutex_unlock(&dsp56k_mutex);
+ return ret;
}
static int dsp56k_release(struct inode *inode, struct file *file)
@@ -483,13 +476,14 @@ static int dsp56k_release(struct inode *inode, struct file *file)
return 0;
}
-static struct file_operations dsp56k_fops = {
+static const struct file_operations dsp56k_fops = {
.owner = THIS_MODULE,
.read = dsp56k_read,
.write = dsp56k_write,
- .ioctl = dsp56k_ioctl,
+ .unlocked_ioctl = dsp56k_ioctl,
.open = dsp56k_open,
.release = dsp56k_release,
+ .llseek = noop_llseek,
};
@@ -515,19 +509,12 @@ static int __init dsp56k_init_driver(void)
err = PTR_ERR(dsp56k_class);
goto out_chrdev;
}
- class_device_create(dsp56k_class, NULL, MKDEV(DSP56K_MAJOR, 0), NULL, "dsp56k");
-
- err = devfs_mk_cdev(MKDEV(DSP56K_MAJOR, 0),
- S_IFCHR | S_IRUSR | S_IWUSR, "dsp56k");
- if(err)
- goto out_class;
+ device_create(dsp56k_class, NULL, MKDEV(DSP56K_MAJOR, 0), NULL,
+ "dsp56k");
printk(banner);
goto out;
-out_class:
- class_device_destroy(dsp56k_class, MKDEV(DSP56K_MAJOR, 0));
- class_destroy(dsp56k_class);
out_chrdev:
unregister_chrdev(DSP56K_MAJOR, "dsp56k");
out:
@@ -537,11 +524,11 @@ module_init(dsp56k_init_driver);
static void __exit dsp56k_cleanup_driver(void)
{
- class_device_destroy(dsp56k_class, MKDEV(DSP56K_MAJOR, 0));
+ device_destroy(dsp56k_class, MKDEV(DSP56K_MAJOR, 0));
class_destroy(dsp56k_class);
unregister_chrdev(DSP56K_MAJOR, "dsp56k");
- devfs_remove("dsp56k");
}
module_exit(dsp56k_cleanup_driver);
MODULE_LICENSE("GPL");
+MODULE_FIRMWARE("dsp56k/bootstrap.bin");
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-05 18:37:09 +0000