mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-21 17:38:51 +09:00
![Simon Glass](/assets/img/avatar_default.png)
Move this uncommon header out of the common header. Signed-off-by: Simon Glass <sjg@chromium.org>
216 lines
5.5 KiB
C
216 lines
5.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* (C) Copyright 2018
|
|
* Mario Six, Guntermann & Drunck GmbH, mario.six@gdsys.cc
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <command.h>
|
|
#include <dm.h>
|
|
#include <log.h>
|
|
#include <sysreset.h>
|
|
#include <wait_bit.h>
|
|
#include <linux/delay.h>
|
|
|
|
#include "sysreset_mpc83xx.h"
|
|
|
|
/* Magic 4-byte word to enable reset ('RSTE' in ASCII) */
|
|
static const u32 RPR_MAGIC = 0x52535445;
|
|
/* Wait at most 2000ms for reset control enable bit */
|
|
static const uint RESET_WAIT_TIMEOUT = 2000;
|
|
|
|
/**
|
|
* __do_reset() - Execute the system reset
|
|
*
|
|
* Return: The functions resets the system, and never returns.
|
|
*/
|
|
static int __do_reset(void)
|
|
{
|
|
ulong msr;
|
|
int res;
|
|
|
|
immap_t *immap = (immap_t *)CONFIG_SYS_IMMR;
|
|
|
|
puts("Resetting the board.\n");
|
|
|
|
/* Interrupts and MMU off */
|
|
msr = mfmsr();
|
|
msr &= ~(MSR_EE | MSR_IR | MSR_DR);
|
|
mtmsr(msr);
|
|
|
|
/* Enable Reset Control Reg */
|
|
out_be32(&immap->reset.rpr, RPR_MAGIC);
|
|
sync();
|
|
isync();
|
|
|
|
/* Confirm Reset Control Reg is enabled */
|
|
res = wait_for_bit_be32(&immap->reset.rcer, RCER_CRE, true,
|
|
RESET_WAIT_TIMEOUT, false);
|
|
if (res) {
|
|
debug("%s: Timed out waiting for reset control to be set\n",
|
|
__func__);
|
|
return res;
|
|
}
|
|
|
|
udelay(200);
|
|
|
|
/* Perform reset, only one bit */
|
|
out_be32(&immap->reset.rcr, RCR_SWHR);
|
|
|
|
/* Never executes */
|
|
return 0;
|
|
}
|
|
|
|
static int mpc83xx_sysreset_request(struct udevice *dev, enum sysreset_t type)
|
|
{
|
|
switch (type) {
|
|
case SYSRESET_WARM:
|
|
case SYSRESET_COLD:
|
|
return __do_reset();
|
|
default:
|
|
return -EPROTONOSUPPORT;
|
|
}
|
|
|
|
return -EINPROGRESS;
|
|
}
|
|
|
|
/**
|
|
* print_83xx_arb_event() - Print arbiter events to buffer
|
|
* @force: Print arbiter events, even if none are indicated by the system
|
|
* @buf: The buffer to receive the printed arbiter event information
|
|
* @size: The size of the buffer to receive the printed arbiter event
|
|
* information in bytes
|
|
*
|
|
* Return: Number of bytes printed to buffer, -ve on error
|
|
*/
|
|
static int print_83xx_arb_event(bool force, char *buf, int size)
|
|
{
|
|
int etype = (gd->arch.arbiter_event_attributes & AEATR_EVENT)
|
|
>> AEATR_EVENT_SHIFT;
|
|
int mstr_id = (gd->arch.arbiter_event_attributes & AEATR_MSTR_ID)
|
|
>> AEATR_MSTR_ID_SHIFT;
|
|
int tbst = (gd->arch.arbiter_event_attributes & AEATR_TBST)
|
|
>> AEATR_TBST_SHIFT;
|
|
int tsize = (gd->arch.arbiter_event_attributes & AEATR_TSIZE)
|
|
>> AEATR_TSIZE_SHIFT;
|
|
int ttype = (gd->arch.arbiter_event_attributes & AEATR_TTYPE)
|
|
>> AEATR_TTYPE_SHIFT;
|
|
int tsize_val = (tbst << 3) | tsize;
|
|
int tsize_bytes = tbst ? (tsize ? tsize : 8) : 16 + 8 * tsize;
|
|
int res = 0;
|
|
|
|
/*
|
|
* If we don't force output, and there is no event (event address ==
|
|
* 0), then don't print anything
|
|
*/
|
|
if (!force && !gd->arch.arbiter_event_address)
|
|
return 0;
|
|
|
|
if (CONFIG_IS_ENABLED(CONFIG_DISPLAY_AER_FULL)) {
|
|
res = snprintf(buf, size,
|
|
"Arbiter Event Status:\n"
|
|
" %s: 0x%08lX\n"
|
|
" %s: 0x%1x = %s\n"
|
|
" %s: 0x%02x = %s\n"
|
|
" %s: 0x%1x = %d bytes\n"
|
|
" %s: 0x%02x = %s\n",
|
|
"Event Address", gd->arch.arbiter_event_address,
|
|
"Event Type", etype, event[etype],
|
|
"Master ID", mstr_id, master[mstr_id],
|
|
"Transfer Size", tsize_val, tsize_bytes,
|
|
"Transfer Type", ttype, transfer[ttype]);
|
|
} else if (CONFIG_IS_ENABLED(CONFIG_DISPLAY_AER_BRIEF)) {
|
|
res = snprintf(buf, size,
|
|
"Arbiter Event Status: AEATR=0x%08lX, AEADR=0x%08lX\n",
|
|
gd->arch.arbiter_event_attributes,
|
|
gd->arch.arbiter_event_address);
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
static int mpc83xx_sysreset_get_status(struct udevice *dev, char *buf, int size)
|
|
{
|
|
/* Ad-hoc data structure to map RSR bit values to their descriptions */
|
|
static const struct {
|
|
/* Bit mask for the bit in question */
|
|
ulong mask;
|
|
/* Description of the bitmask in question */
|
|
char *desc;
|
|
} bits[] = {
|
|
{
|
|
RSR_SWSR, "Software Soft"}, {
|
|
RSR_SWHR, "Software Hard"}, {
|
|
RSR_JSRS, "JTAG Soft"}, {
|
|
RSR_CSHR, "Check Stop"}, {
|
|
RSR_SWRS, "Software Watchdog"}, {
|
|
RSR_BMRS, "Bus Monitor"}, {
|
|
RSR_SRS, "External/Internal Soft"}, {
|
|
RSR_HRS, "External/Internal Hard"}
|
|
};
|
|
int res;
|
|
ulong rsr = gd->arch.reset_status;
|
|
int i;
|
|
char *sep;
|
|
|
|
res = snprintf(buf, size, "Reset Status:");
|
|
if (res < 0) {
|
|
debug("%s: Could not write reset status message (err = %d)\n",
|
|
dev->name, res);
|
|
return -EIO;
|
|
}
|
|
|
|
buf += res;
|
|
size -= res;
|
|
|
|
sep = " ";
|
|
for (i = 0; i < ARRAY_SIZE(bits); i++)
|
|
/* Print description of set bits */
|
|
if (rsr & bits[i].mask) {
|
|
res = snprintf(buf, size, "%s%s%s", sep, bits[i].desc,
|
|
(i == ARRAY_SIZE(bits) - 1) ? "\n" : "");
|
|
if (res < 0) {
|
|
debug("%s: Could not write reset status message (err = %d)\n",
|
|
dev->name, res);
|
|
return -EIO;
|
|
}
|
|
buf += res;
|
|
size -= res;
|
|
sep = ", ";
|
|
}
|
|
|
|
/*
|
|
* TODO(mario.six@gdsys.cc): Move this into a dedicated
|
|
* arbiter driver
|
|
*/
|
|
if (CONFIG_IS_ENABLED(CONFIG_DISPLAY_AER_FULL) ||
|
|
CONFIG_IS_ENABLED(CONFIG_DISPLAY_AER_BRIEF)) {
|
|
/*
|
|
* If there was a bus monitor reset event, we force the arbiter
|
|
* event to be printed
|
|
*/
|
|
res = print_83xx_arb_event(rsr & RSR_BMRS, buf, size);
|
|
if (res < 0) {
|
|
debug("%s: Could not write arbiter event message (err = %d)\n",
|
|
dev->name, res);
|
|
return -EIO;
|
|
}
|
|
buf += res;
|
|
size -= res;
|
|
}
|
|
snprintf(buf, size, "\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct sysreset_ops mpc83xx_sysreset = {
|
|
.request = mpc83xx_sysreset_request,
|
|
.get_status = mpc83xx_sysreset_get_status,
|
|
};
|
|
|
|
U_BOOT_DRIVER(sysreset_mpc83xx) = {
|
|
.name = "mpc83xx_sysreset",
|
|
.id = UCLASS_SYSRESET,
|
|
.ops = &mpc83xx_sysreset,
|
|
};
|