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wifipineapple-openwrt/target/linux/brcm47xx/files/arch/mips/cfe/cfe.c

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/*
* Broadcom Common Firmware Environment (CFE) support
*
* Copyright 2000, 2001, 2002
* Broadcom Corporation. All rights reserved.
*
* Copyright (C) 2006 Michael Buesch
*
* Original Authors: Mitch Lichtenberg, Chris Demetriou
*
* This software is furnished under license and may be used and copied only
* in accordance with the following terms and conditions. Subject to these
* conditions, you may download, copy, install, use, modify and distribute
* modified or unmodified copies of this software in source and/or binary
* form. No title or ownership is transferred hereby.
*
* 1) Any source code used, modified or distributed must reproduce and
* retain this copyright notice and list of conditions as they appear in
* the source file.
*
* 2) No right is granted to use any trade name, trademark, or logo of
* Broadcom Corporation. The "Broadcom Corporation" name may not be
* used to endorse or promote products derived from this software
* without the prior written permission of Broadcom Corporation.
*
* 3) THIS SOFTWARE IS PROVIDED "AS-IS" AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING BUT NOT LIMITED TO, ANY IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
* NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL BROADCOM BE LIABLE
* FOR ANY DAMAGES WHATSOEVER, AND IN PARTICULAR, BROADCOM SHALL NOT BE
* LIABLE FOR DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE), EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <linux/init.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/spinlock.h>
#include <asm/cfe.h>
#include "cfe_private.h"
static cfe_uint_t cfe_handle;
static int (*cfe_trampoline)(long handle, long iocb);
#include <linux/kernel.h>
void __init cfe_setup(unsigned long fwarg0, unsigned long fwarg1,
unsigned long fwarg2, unsigned long fwarg3)
{
if (fwarg3 == 0x80300000) {
/* WRT54G workaround */
fwarg3 = CFE_EPTSEAL;
fwarg2 = 0xBFC00500;
}
if (fwarg3 != CFE_EPTSEAL) {
/* We are not booted from CFE */
return;
}
if (fwarg1 == 0) {
/* We are on the boot CPU */
cfe_handle = (cfe_uint_t)fwarg0;
cfe_trampoline = CFE_TO_PTR(fwarg2);
}
}
int cfe_vprintk(const char *fmt, va_list args)
{
static char buffer[1024];
static DEFINE_SPINLOCK(lock);
static const char pfx[] = "CFE-console: ";
static const size_t pfx_len = sizeof(pfx) - 1;
unsigned long flags;
int len, cnt, pos;
int handle;
int res;
if (!cfe_present())
return -ENODEV;
spin_lock_irqsave(&lock, flags);
handle = cfe_getstdhandle(CFE_STDHANDLE_CONSOLE);
if (CFE_ISERR(handle)) {
len = -EIO;
goto out;
}
strcpy(buffer, pfx);
len = vscnprintf(buffer + pfx_len,
sizeof(buffer) - pfx_len - 2,
fmt, args);
len += pfx_len;
/* The CFE console requires CR-LF line-ends.
* Add a CR, if we only terminate lines with a LF.
* This does only fix CR-LF at the end of the string.
* So for multiple lines, use multiple cfe_vprintk calls.
*/
if (len > 1 &&
buffer[len - 1] == '\n' && buffer[len - 2] != '\r') {
buffer[len - 1] = '\r';
buffer[len] = '\n';
len += 1;
}
cnt = len;
pos = 0;
while (cnt > 0) {
res = cfe_write(handle, buffer + pos, len - pos);
if (CFE_ISERR(res)) {
len = -EIO;
goto out;
}
cnt -= res;
pos += res;
}
out:
spin_unlock_irqrestore(&lock, flags);
return len;
}
int cfe_printk(const char *fmt, ...)
{
va_list args;
int res;
va_start(args, fmt);
res = cfe_vprintk(fmt, args);
va_end(args);
return res;
}
static int cfe_iocb_dispatch(struct cfe_iocb *iocb)
{
if (!cfe_present())
return CFE_ERR_UNSUPPORTED;
return cfe_trampoline((long)cfe_handle, (long)iocb);
}
int cfe_present(void)
{
return (cfe_trampoline != NULL);
}
int cfe_close(int handle)
{
struct cfe_iocb iocb;
int err;
memset(&iocb, 0, sizeof(iocb));
iocb.fcode = CFE_CMD_DEV_CLOSE;
iocb.handle = handle;
err = cfe_iocb_dispatch(&iocb);
return (CFE_ISERR(err)) ? err : iocb.status;
}
int cfe_cpu_start(int cpu, void (*fn)(void), long sp, long gp, long a1)
{
struct cfe_iocb iocb;
int err;
memset(&iocb, 0, sizeof(iocb));
iocb.fcode = CFE_CMD_FW_CPUCTL;
iocb.psize = sizeof(struct cfe_iocb_cpuctl);
iocb.cpuctl.number = cpu;
iocb.cpuctl.command = CFE_CPU_CMD_START;
iocb.cpuctl.gp = gp;
iocb.cpuctl.sp = sp;
iocb.cpuctl.a1 = a1;
iocb.cpuctl.start_addr = (long)fn;
err = cfe_iocb_dispatch(&iocb);
return (CFE_ISERR(err)) ? err : iocb.status;
}
int cfe_cpu_stop(int cpu)
{
struct cfe_iocb iocb;
int err;
memset(&iocb, 0, sizeof(iocb));
iocb.fcode = CFE_CMD_FW_CPUCTL;
iocb.psize = sizeof(struct cfe_iocb_cpuctl);
iocb.cpuctl.number = cpu;
iocb.cpuctl.command = CFE_CPU_CMD_STOP;
err = cfe_iocb_dispatch(&iocb);
return (CFE_ISERR(err)) ? err : iocb.status;
}
int cfe_enumenv(int idx, char *name, int namelen, char *val, int vallen)
{
struct cfe_iocb iocb;
int err;
memset(&iocb, 0, sizeof(iocb));
iocb.fcode = CFE_CMD_ENV_ENUM;
iocb.psize = sizeof(struct cfe_iocb_envbuf);
iocb.envbuf.index = idx;
iocb.envbuf.name = PTR_TO_CFE(name);
iocb.envbuf.name_len = namelen;
iocb.envbuf.val = PTR_TO_CFE(val);
iocb.envbuf.val_len = vallen;
err = cfe_iocb_dispatch(&iocb);
return (CFE_ISERR(err)) ? err : iocb.status;
}
int cfe_enumdev(int idx, char *name, int namelen)
{
struct cfe_iocb iocb;
int err;
memset(&iocb, 0, sizeof(iocb));
iocb.fcode = CFE_CMD_DEV_ENUM;
iocb.psize = sizeof(struct cfe_iocb_envbuf);
iocb.envbuf.index = idx;
iocb.envbuf.name = PTR_TO_CFE(name);
iocb.envbuf.name_len = namelen;
err = cfe_iocb_dispatch(&iocb);
return (CFE_ISERR(err)) ? err : iocb.status;
}
int cfe_enummem(int idx, int flags, u64 *start, u64 *length,
u64 *type)
{
struct cfe_iocb iocb;
int err;
memset(&iocb, 0, sizeof(iocb));
iocb.fcode = CFE_CMD_FW_MEMENUM;
iocb.flags = flags;
iocb.psize = sizeof(struct cfe_iocb_meminfo);
iocb.meminfo.index = idx;
err = cfe_iocb_dispatch(&iocb);
if (CFE_ISERR(err))
return err;
if (!CFE_ISERR(iocb.status)) {
*start = iocb.meminfo.addr;
*length = iocb.meminfo.size;
*type = iocb.meminfo.type;
}
return iocb.status;
}
int cfe_exit(int warm, int status)
{
struct cfe_iocb iocb;
int err;
printk("CFE REBOOT\n");
memset(&iocb, 0, sizeof(iocb));
iocb.fcode = CFE_CMD_FW_RESTART;
if (warm)
iocb.flags = CFE_FLG_WARMSTART;
iocb.psize = sizeof(struct cfe_iocb_exitstat);
iocb.exitstat.status = status;
printk("CALL\n");
err = cfe_iocb_dispatch(&iocb);
printk("DONE\n");
return (CFE_ISERR(err)) ? err : iocb.status;
}
int cfe_flushcache(int flags)
{
struct cfe_iocb iocb;
int err;
memset(&iocb, 0, sizeof(iocb));
iocb.fcode = CFE_CMD_FW_FLUSHCACHE;
iocb.flags = flags;
err = cfe_iocb_dispatch(&iocb);
return (CFE_ISERR(err)) ? err : iocb.status;
}
int cfe_getdevinfo(char *name)
{
struct cfe_iocb iocb;
int err;
memset(&iocb, 0, sizeof(iocb));
iocb.fcode = CFE_CMD_DEV_GETINFO;
iocb.psize = sizeof(struct cfe_iocb_buf);
iocb.buffer.ptr = PTR_TO_CFE(name);
iocb.buffer.length = strlen(name);
err = cfe_iocb_dispatch(&iocb);
if (CFE_ISERR(err))
return err;
if (CFE_ISERR(iocb.status))
return iocb.status;
return iocb.buffer.devflags;
}
int cfe_getenv(char *name, char *dest, int destlen)
{
struct cfe_iocb iocb;
int err;
dest[0] = '\0';
memset(&iocb, 0, sizeof(iocb));
iocb.fcode = CFE_CMD_ENV_GET;
iocb.psize = sizeof(struct cfe_iocb_envbuf);
iocb.envbuf.name = PTR_TO_CFE(name);
iocb.envbuf.name_len = strlen(name);
iocb.envbuf.val = PTR_TO_CFE(dest);
iocb.envbuf.val_len = destlen;
err = cfe_iocb_dispatch(&iocb);
return (CFE_ISERR(err)) ? err : iocb.status;
}
int cfe_getfwinfo(struct cfe_fwinfo *info)
{
struct cfe_iocb iocb;
int err;
memset(&iocb, 0, sizeof(iocb));
iocb.fcode = CFE_CMD_FW_GETINFO;
iocb.psize = sizeof(struct cfe_iocb_fwinfo);
err = cfe_iocb_dispatch(&iocb);
if (CFE_ISERR(err))
return err;
if (CFE_ISERR(iocb.status))
return err;
info->version = iocb.fwinfo.version;
info->totalmem = iocb.fwinfo.totalmem;
info->flags = iocb.fwinfo.flags;
info->boardid = iocb.fwinfo.boardid;
info->bootarea_va = iocb.fwinfo.bootarea_va;
info->bootarea_pa = iocb.fwinfo.bootarea_pa;
info->bootarea_size = iocb.fwinfo.bootarea_size;
return iocb.status;
}
int cfe_getstdhandle(int handletype)
{
struct cfe_iocb iocb;
int err;
memset(&iocb, 0, sizeof(iocb));
iocb.fcode = CFE_CMD_DEV_GETHANDLE;
iocb.flags = handletype;
err = cfe_iocb_dispatch(&iocb);
if (CFE_ISERR(err))
return err;
if (CFE_ISERR(iocb.status))
return iocb.status;
return iocb.handle;
}
int cfe_getticks(s64 *ticks)
{
struct cfe_iocb iocb;
int err;
memset(&iocb, 0, sizeof(iocb));
iocb.fcode = CFE_CMD_FW_GETTIME;
iocb.psize = sizeof(struct cfe_iocb_time);
err = cfe_iocb_dispatch(&iocb);
if (CFE_ISERR(err))
return err;
if (!CFE_ISERR(iocb.status))
*ticks = iocb.time.ticks;
return iocb.status;
}
int cfe_inpstat(int handle)
{
struct cfe_iocb iocb;
int err;
memset(&iocb, 0, sizeof(iocb));
iocb.fcode = CFE_CMD_DEV_INPSTAT;
iocb.handle = handle;
iocb.psize = sizeof(struct cfe_iocb_inpstat);
err = cfe_iocb_dispatch(&iocb);
if (CFE_ISERR(err))
return err;
if (CFE_ISERR(iocb.status))
return iocb.status;
return iocb.inpstat.status;
}
int cfe_ioctl(int handle, unsigned int ioctlnum,
unsigned char *buffer, int length,
int *retlen, u64 offset)
{
struct cfe_iocb iocb;
int err;
memset(&iocb, 0, sizeof(iocb));
iocb.fcode = CFE_CMD_DEV_IOCTL;
iocb.handle = handle;
iocb.psize = sizeof(struct cfe_iocb_buf);
iocb.buffer.offset = offset;
iocb.buffer.ioctlcmd = ioctlnum;
iocb.buffer.ptr = PTR_TO_CFE(buffer);
iocb.buffer.length = length;
err = cfe_iocb_dispatch(&iocb);
if (CFE_ISERR(err))
return err;
if (CFE_ISERR(iocb.status))
return iocb.status;
if (retlen)
*retlen = iocb.buffer.retlen;
return iocb.status;
}
int cfe_open(char *name)
{
struct cfe_iocb iocb;
int err;
memset(&iocb, 0, sizeof(iocb));
iocb.fcode = CFE_CMD_DEV_OPEN;
iocb.psize = sizeof(struct cfe_iocb_buf);
iocb.buffer.ptr = PTR_TO_CFE(name);
iocb.buffer.length = strlen(name);
err = cfe_iocb_dispatch(&iocb);
if (CFE_ISERR(err))
return err;
if (CFE_ISERR(iocb.status))
return iocb.status;
return iocb.handle;
}
int cfe_read(int handle, unsigned char *buffer, int length)
{
return cfe_readblk(handle, 0, buffer, length);
}
int cfe_readblk(int handle, s64 offset, unsigned char *buffer, int length)
{
struct cfe_iocb iocb;
int err;
memset(&iocb, 0, sizeof(iocb));
iocb.fcode = CFE_CMD_DEV_READ;
iocb.handle = handle;
iocb.psize = sizeof(struct cfe_iocb_buf);
iocb.buffer.offset = offset;
iocb.buffer.ptr = PTR_TO_CFE(buffer);
iocb.buffer.length = length;
err = cfe_iocb_dispatch(&iocb);
if (CFE_ISERR(err))
return err;
if (CFE_ISERR(iocb.status))
return iocb.status;
return iocb.buffer.retlen;
}
int cfe_setenv(char *name, char *val)
{
struct cfe_iocb iocb;
int err;
memset(&iocb, 0, sizeof(iocb));
iocb.fcode = CFE_CMD_ENV_SET;
iocb.psize = sizeof(struct cfe_iocb_envbuf);
iocb.envbuf.name = PTR_TO_CFE(name);
iocb.envbuf.name_len = strlen(name);
iocb.envbuf.val = PTR_TO_CFE(val);
iocb.envbuf.val_len = strlen(val);
err = cfe_iocb_dispatch(&iocb);
return (CFE_ISERR(err)) ? err : iocb.status;
}
int cfe_write(int handle, unsigned char *buffer, int length)
{
return cfe_writeblk(handle, 0, buffer, length);
}
int cfe_writeblk(int handle, s64 offset, unsigned char *buffer, int length)
{
struct cfe_iocb iocb;
int err;
memset(&iocb, 0, sizeof(iocb));
iocb.fcode = CFE_CMD_DEV_WRITE;
iocb.handle = handle;
iocb.psize = sizeof(struct cfe_iocb_buf);
iocb.buffer.offset = offset;
iocb.buffer.ptr = PTR_TO_CFE(buffer);
iocb.buffer.length = length;
err = cfe_iocb_dispatch(&iocb);
if (CFE_ISERR(err))
return err;
if (CFE_ISERR(iocb.status))
return iocb.status;
return iocb.buffer.retlen;
}
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