// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2008
* Heiko Schocher, DENX Software Engineering, hs@denx.de.
*
* (C) Copyright 2011
* Holger Brunck, Keymile GmbH Hannover, holger.brunck@keymile.com
*/
#include <common.h>
#include <ioports.h>
#include <command.h>
#include <malloc.h>
#include <cli_hush.h>
#include <net.h>
#include <netdev.h>
#include <asm/io.h>
#include <linux/ctype.h>
#if defined(CONFIG_POST)
#include "post.h"
#endif
#include "common.h"
#include <i2c.h>
DECLARE_GLOBAL_DATA_PTR;
/*
* Set Keymile specific environment variables
* Currently only some memory layout variables are calculated here
* ... ------------------------------------------------
* ... |@rootfsaddr |@pnvramaddr |@varaddr |@reserved |@END_OF_RAM
* ... |<------------------- pram ------------------->|
* ... ------------------------------------------------
* @END_OF_RAM: denotes the RAM size
* @pnvramaddr: Startadress of pseudo non volatile RAM in hex
* @pram : preserved ram size in k
* @varaddr : startadress for /var mounted into RAM
*/
int set_km_env(void)
{
uchar buf[32];
unsigned int pnvramaddr;
unsigned int pram;
unsigned int varaddr;
unsigned int kernelmem;
char *p;
unsigned long rootfssize = 0;
pnvramaddr = gd->ram_size - CONFIG_KM_RESERVED_PRAM - CONFIG_KM_PHRAM
- CONFIG_KM_PNVRAM;
sprintf((char *)buf, "0x%x", pnvramaddr);
env_set("pnvramaddr", (char *)buf);
/* try to read rootfssize (ram image) from environment */
p = env_get("rootfssize");
if (p != NULL)
strict_strtoul(p, 16, &rootfssize);
pram = (rootfssize + CONFIG_KM_RESERVED_PRAM + CONFIG_KM_PHRAM +
CONFIG_KM_PNVRAM) / 0x400;
sprintf((char *)buf, "0x%x", pram);
env_set("pram", (char *)buf);
varaddr = gd->ram_size - CONFIG_KM_RESERVED_PRAM - CONFIG_KM_PHRAM;
sprintf((char *)buf, "0x%x", varaddr);
env_set("varaddr", (char *)buf);
kernelmem = gd->ram_size - 0x400 * pram;
sprintf((char *)buf, "0x%x", kernelmem);
env_set("kernelmem", (char *)buf);
return 0;
}
#if defined(CONFIG_SYS_I2C_INIT_BOARD)
static void i2c_write_start_seq(void)
{
set_sda(1);
udelay(DELAY_HALF_PERIOD);
set_scl(1);
udelay(DELAY_HALF_PERIOD);
set_sda(0);
udelay(DELAY_HALF_PERIOD);
set_scl(0);
udelay(DELAY_HALF_PERIOD);
}
/*
* I2C is a synchronous protocol and resets of the processor in the middle
* of an access can block the I2C Bus until a powerdown of the full unit is
* done. This function toggles the SCL until the SCL and SCA line are
* released, but max. 16 times, after this a I2C start-sequence is sent.
* This I2C Deblocking mechanism was developed by Keymile in association
* with Anatech and Atmel in 1998.
*/
int i2c_make_abort(void)
{
int scl_state = 0;
int sda_state = 0;
int i = 0;
int ret = 0;
if (!get_sda()) {
ret = -1;
while (i < 16) {
i++;
set_scl(0);
udelay(DELAY_ABORT_SEQ);
set_scl(1);
udelay(DELAY_ABORT_SEQ);
scl_state = get_scl();
sda_state = get_sda();
if (scl_state && sda_state) {
ret = 0;
break;
}
}
}
if (ret == 0)
for (i = 0; i < 5; i++)
i2c_write_start_seq();
/* respect stop setup time */
udelay(DELAY_ABORT_SEQ);
set_scl(1);
udelay(DELAY_ABORT_SEQ);
set_sda(1);
get_sda();
return ret;
}
/**
* i2c_init_board - reset i2c bus. When the board is powercycled during a
* bus transfer it might hang; for details see doc/I2C_Edge_Conditions.
*/
void i2c_init_board(void)
{
/* Now run the AbortSequence() */
i2c_make_abort();
}
#endif
#if defined(CONFIG_KM_COMMON_ETH_INIT)
int board_eth_init(bd_t *bis)
{
if (ethernet_present())
return cpu_eth_init(bis);
return -1;
}
#endif
/*
* do_setboardid command
* read out the board id and the hw key from the intventory EEPROM and set
* this values as environment variables.
*/
static int do_setboardid(cmd_tbl_t *cmdtp, int flag, int argc,
char *const argv[])
{
unsigned char buf[32];
char *p;
p = get_local_var("IVM_BoardId");
if (p == NULL) {
printf("can't get the IVM_Boardid\n");
return 1;
}
strcpy((char *)buf, p);
env_set("boardid", (char *)buf);
printf("set boardid=%s\n", buf);
p = get_local_var("IVM_HWKey");
if (p == NULL) {
printf("can't get the IVM_HWKey\n");
return 1;
}
strcpy((char *)buf, p);
env_set("hwkey", (char *)buf);
printf("set hwkey=%s\n", buf);
printf("Execute manually saveenv for persistent storage.\n");
return 0;
}
U_BOOT_CMD(km_setboardid, 1, 0, do_setboardid, "setboardid", "read out bid and "
"hwkey from IVM and set in environment");
/*
* command km_checkbidhwk
* if "boardid" and "hwkey" are not already set in the environment, do:
* if a "boardIdListHex" exists in the environment:
* - read ivm data for boardid and hwkey
* - compare each entry of the boardIdListHex with the
* IVM data:
* if match:
* set environment variables boardid, boardId,
* hwkey, hwKey to the found values
* both (boardid and boardId) are set because
* they might be used differently in the
* application and in the init scripts (?)
* return 0 in case of match, 1 if not match or error
*/
static int do_checkboardidhwk(cmd_tbl_t *cmdtp, int flag, int argc,
char *const argv[])
{
unsigned long ivmbid = 0, ivmhwkey = 0;
unsigned long envbid = 0, envhwkey = 0;
char *p;
int verbose = argc > 1 && *argv[1] == 'v';
int rc = 0;
/*
* first read out the real inventory values, these values are
* already stored in the local hush variables
*/
p = get_local_var("IVM_BoardId");
if (p == NULL) {
printf("can't get the IVM_Boardid\n");
return 1;
}
rc = strict_strtoul(p, 16, &ivmbid);
p = get_local_var("IVM_HWKey");
if (p == NULL) {
printf("can't get the IVM_HWKey\n");
return 1;
}
rc = strict_strtoul(p, 16, &ivmhwkey);
if (!ivmbid || !ivmhwkey) {
printf("Error: IVM_BoardId and/or IVM_HWKey not set!\n");
return rc;
}
/* now try to read values from environment if available */
p = env_get("boardid");
if (p != NULL)
rc = strict_strtoul(p, 16, &envbid);
p = env_get("hwkey");
if (p != NULL)
rc = strict_strtoul(p, 16, &envhwkey);
if (rc != 0) {
printf("strict_strtoul returns error: %d", rc);
return rc;
}
if (!envbid || !envhwkey) {
/*
* BoardId/HWkey not available in the environment, so try the
* environment variable for BoardId/HWkey list
*/
char *bidhwklist = env_get("boardIdListHex");
if (bidhwklist) {
int found = 0;
char *rest = bidhwklist;
char *endp;
if (verbose) {
printf("IVM_BoardId: %ld, IVM_HWKey=%ld\n",
ivmbid, ivmhwkey);
printf("boardIdHwKeyList: %s\n",
bidhwklist);
}
while (!found) {
/* loop over each bid/hwkey pair in the list */
unsigned long bid = 0;
unsigned long hwkey = 0;
while (*rest && !isxdigit(*rest))
rest++;
/*
* use simple_strtoul because we need &end and
* we know we got non numeric char at the end
*/
bid = simple_strtoul(rest, &endp, 16);
/* BoardId and HWkey are separated with a "_" */
if (*endp == '_') {
rest = endp + 1;
/*
* use simple_strtoul because we need
* &end
*/
hwkey = simple_strtoul(rest, &endp, 16);
rest = endp;
while (*rest && !isxdigit(*rest))
rest++;
}
if ((!bid) || (!hwkey)) {
/* end of list */
break;
}
if (verbose) {
printf("trying bid=0x%lX, hwkey=%ld\n",
bid, hwkey);
}
/*
* Compare the values of the found entry in the
* list with the valid values which are stored
* in the inventory eeprom. If they are equal
* set the values in environment variables.
*/
if ((bid == ivmbid) && (hwkey == ivmhwkey)) {
char buf[10];
found = 1;
envbid = bid;
envhwkey = hwkey;
sprintf(buf, "%lx", bid);
env_set("boardid", buf);
sprintf(buf, "%lx", hwkey);
env_set("hwkey", buf);
}
} /* end while( ! found ) */
}
}
/* compare now the values */
if ((ivmbid == envbid) && (ivmhwkey == envhwkey)) {
printf("boardid=0x%3lX, hwkey=%ld\n", envbid, envhwkey);
rc = 0; /* match */
} else {
printf("Error: env boardid=0x%3lX, hwkey=%ld\n", envbid,
envhwkey);
printf(" IVM bId=0x%3lX, hwKey=%ld\n", ivmbid, ivmhwkey);
rc = 1; /* don't match */
}
return rc;
}
U_BOOT_CMD(km_checkbidhwk, 2, 0, do_checkboardidhwk,
"check boardid and hwkey",
"[v]\n - check environment parameter "\
"\"boardIdListHex\" against stored boardid and hwkey "\
"from the IVM\n v: verbose output"
);
/*
* command km_checktestboot
* if the testpin of the board is asserted, return 1
* * else return 0
*/
static int do_checktestboot(cmd_tbl_t *cmdtp, int flag, int argc,
char *const argv[])
{
int testpin = 0;
char *s = NULL;
int testboot = 0;
int verbose = argc > 1 && *argv[1] == 'v';
#if defined(CONFIG_POST)
testpin = post_hotkeys_pressed();
#endif
s = env_get("test_bank");
/* when test_bank is not set, act as if testpin is not asserted */
testboot = (testpin != 0) && (s);
if (verbose) {
printf("testpin = %d\n", testpin);
/* cppcheck-suppress nullPointer */
printf("test_bank = %s\n", s ? s : "not set");
printf("boot test app : %s\n", (testboot) ? "yes" : "no");
}
/* return 0 means: testboot, therefore we need the inversion */
return !testboot;
}
U_BOOT_CMD(km_checktestboot, 2, 0, do_checktestboot,
"check if testpin is asserted",
"[v]\n v - verbose output"
);