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