--- /dev/null
+/*
+ * (C) Copyright 2008
+ * Heiko Schocher, DENX Software Engineering, hs@denx.de.
+ *
+ * (C) Copyright 2011
+ * Holger Brunck, Keymile GmbH Hannover, holger.brunck@keymile.com
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <ioports.h>
+#include <command.h>
+#include <malloc.h>
+#include <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);
+ setenv("pnvramaddr", (char *)buf);
+
+ /* try to read rootfssize (ram image) from envrionment */
+ p = getenv("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);
+ setenv("pram", (char *)buf);
+
+ varaddr = gd->ram_size - CONFIG_KM_RESERVED_PRAM - CONFIG_KM_PHRAM;
+ sprintf((char *)buf, "0x%x", varaddr);
+ setenv("varaddr", (char *)buf);
+
+ kernelmem = gd->ram_size - 0x400 * pram;
+ sprintf((char *)buf, "0x%x", kernelmem);
+ setenv("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;
+ }
+ sprintf((char *)buf, "%s", p);
+ setenv("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;
+ }
+ sprintf((char *)buf, "%s", p);
+ setenv("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 = getenv("boardid");
+ if (p != NULL)
+ rc = strict_strtoul(p, 16, &envbid);
+ p = getenv("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 = getenv("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);
+ setenv("boardid", buf);
+ sprintf(buf, "%lx", hwkey);
+ setenv("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();
+ s = getenv("test_bank");
+#endif
+ /* when test_bank is not set, act as if testpin is not asserted */
+ testboot = (testpin != 0) && (s);
+ if (verbose) {
+ printf("testpin = %d\n", testpin);
+ 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"
+);
Code Review / kvmfornfv.git / blobdiff