mirror of
https://github.com/torvalds/linux.git
synced 2024-11-28 07:01:32 +00:00
2d4d3b5d45
The Kconfig currently controlling compilation of this code is:
config BF561_COREB
bool "Enable Core B loader"
...meaning that it currently is not being built as a module by anyone.
Lets remove the modular code that is essentially orphaned, so that
when reading the driver there is no doubt it is builtin-only.
Since module_misc_device translates to device_initcall in the non-modular
case, the init ordering remains unchanged with this commit.
We also delete the MODULE_LICENSE tag etc. since all that information
was (or is now) contained at the top of the file in the comments.
Cc: Bas Vermeulen <bvermeul@blackstar.xs4all.nl>
Cc: Steven Miao <realmz6@gmail.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
65 lines
1.6 KiB
C
65 lines
1.6 KiB
C
/* Load firmware into Core B on a BF561
|
|
*
|
|
* Author: Bas Vermeulen <bvermeul@blackstar.xs4all.nl>
|
|
*
|
|
* Copyright 2004-2009 Analog Devices Inc.
|
|
* Licensed under the GPL-2 or later.
|
|
*/
|
|
|
|
/* The Core B reset func requires code in the application that is loaded into
|
|
* Core B. In order to reset, the application needs to install an interrupt
|
|
* handler for Supplemental Interrupt 0, that sets RETI to 0xff600000 and
|
|
* writes bit 11 of SICB_SYSCR when bit 5 of SICA_SYSCR is 0. This causes Core
|
|
* B to stall when Supplemental Interrupt 0 is set, and will reset PC to
|
|
* 0xff600000 when COREB_SRAM_INIT is cleared.
|
|
*/
|
|
|
|
#include <linux/device.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/init.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/miscdevice.h>
|
|
|
|
#define CMD_COREB_START _IO('b', 0)
|
|
#define CMD_COREB_STOP _IO('b', 1)
|
|
#define CMD_COREB_RESET _IO('b', 2)
|
|
|
|
static long
|
|
coreb_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
|
|
{
|
|
int ret = 0;
|
|
|
|
switch (cmd) {
|
|
case CMD_COREB_START:
|
|
bfin_write_SYSCR(bfin_read_SYSCR() & ~0x0020);
|
|
break;
|
|
case CMD_COREB_STOP:
|
|
bfin_write_SYSCR(bfin_read_SYSCR() | 0x0020);
|
|
bfin_write_SICB_SYSCR(bfin_read_SICB_SYSCR() | 0x0080);
|
|
break;
|
|
case CMD_COREB_RESET:
|
|
bfin_write_SICB_SYSCR(bfin_read_SICB_SYSCR() | 0x0080);
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
CSYNC();
|
|
|
|
return ret;
|
|
}
|
|
|
|
static const struct file_operations coreb_fops = {
|
|
.owner = THIS_MODULE,
|
|
.unlocked_ioctl = coreb_ioctl,
|
|
.llseek = noop_llseek,
|
|
};
|
|
|
|
static struct miscdevice coreb_dev = {
|
|
.minor = MISC_DYNAMIC_MINOR,
|
|
.name = "coreb",
|
|
.fops = &coreb_fops,
|
|
};
|
|
builtin_misc_device(coreb_dev);
|