Release 4.14 arch/blackfin/mach-bf561/coreb.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;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Bryan Wu | 51 | 57.95% | 1 | 25.00% |
| Mike Frysinger | 37 | 42.05% | 3 | 75.00% |
| Total | 88 | 100.00% | 4 | 100.00% |
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);
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Bryan Wu | 98 | 58.33% | 1 | 11.11% |
| Mike Frysinger | 55 | 32.74% | 4 | 44.44% |
| Paul Gortmaker | 5 | 2.98% | 1 | 11.11% |
| Arnd Bergmann | 5 | 2.98% | 1 | 11.11% |
| Enrik Berkhan | 4 | 2.38% | 1 | 11.11% |
| Alexey Dobriyan | 1 | 0.60% | 1 | 11.11% |
| PrasannaKumar Muralidharan | | 0.00% | 0 | 0.00% |
| Total | 168 | 100.00% | 9 | 100.00% |
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