3 * Heiko Schocher, DENX Software Engineering, hs@denx.de.
6 * Holger Brunck, Keymile GmbH Hannover, holger.brunck@keymile.com
8 * SPDX-License-Identifier: GPL-2.0+
19 #include <linux/ctype.h>
21 #if defined(CONFIG_POST)
27 DECLARE_GLOBAL_DATA_PTR;
30 * Set Keymile specific environment variables
31 * Currently only some memory layout variables are calculated here
32 * ... ------------------------------------------------
33 * ... |@rootfsaddr |@pnvramaddr |@varaddr |@reserved |@END_OF_RAM
34 * ... |<------------------- pram ------------------->|
35 * ... ------------------------------------------------
36 * @END_OF_RAM: denotes the RAM size
37 * @pnvramaddr: Startadress of pseudo non volatile RAM in hex
38 * @pram : preserved ram size in k
39 * @varaddr : startadress for /var mounted into RAM
44 unsigned int pnvramaddr;
47 unsigned int kernelmem;
49 unsigned long rootfssize = 0;
51 pnvramaddr = gd->ram_size - CONFIG_KM_RESERVED_PRAM - CONFIG_KM_PHRAM
53 sprintf((char *)buf, "0x%x", pnvramaddr);
54 setenv("pnvramaddr", (char *)buf);
56 /* try to read rootfssize (ram image) from envrionment */
57 p = getenv("rootfssize");
59 strict_strtoul(p, 16, &rootfssize);
60 pram = (rootfssize + CONFIG_KM_RESERVED_PRAM + CONFIG_KM_PHRAM +
61 CONFIG_KM_PNVRAM) / 0x400;
62 sprintf((char *)buf, "0x%x", pram);
63 setenv("pram", (char *)buf);
65 varaddr = gd->ram_size - CONFIG_KM_RESERVED_PRAM - CONFIG_KM_PHRAM;
66 sprintf((char *)buf, "0x%x", varaddr);
67 setenv("varaddr", (char *)buf);
69 kernelmem = gd->ram_size - 0x400 * pram;
70 sprintf((char *)buf, "0x%x", kernelmem);
71 setenv("kernelmem", (char *)buf);
76 #if defined(CONFIG_SYS_I2C_INIT_BOARD)
77 static void i2c_write_start_seq(void)
80 udelay(DELAY_HALF_PERIOD);
82 udelay(DELAY_HALF_PERIOD);
84 udelay(DELAY_HALF_PERIOD);
86 udelay(DELAY_HALF_PERIOD);
90 * I2C is a synchronous protocol and resets of the processor in the middle
91 * of an access can block the I2C Bus until a powerdown of the full unit is
92 * done. This function toggles the SCL until the SCL and SCA line are
93 * released, but max. 16 times, after this a I2C start-sequence is sent.
94 * This I2C Deblocking mechanism was developed by Keymile in association
95 * with Anatech and Atmel in 1998.
97 int i2c_make_abort(void)
109 udelay(DELAY_ABORT_SEQ);
111 udelay(DELAY_ABORT_SEQ);
112 scl_state = get_scl();
113 sda_state = get_sda();
114 if (scl_state && sda_state) {
121 for (i = 0; i < 5; i++)
122 i2c_write_start_seq();
124 /* respect stop setup time */
125 udelay(DELAY_ABORT_SEQ);
127 udelay(DELAY_ABORT_SEQ);
135 * i2c_init_board - reset i2c bus. When the board is powercycled during a
136 * bus transfer it might hang; for details see doc/I2C_Edge_Conditions.
138 void i2c_init_board(void)
140 /* Now run the AbortSequence() */
145 int board_eth_init(bd_t *bis)
147 if (ethernet_present())
148 return cpu_eth_init(bis);
154 * do_setboardid command
155 * read out the board id and the hw key from the intventory EEPROM and set
156 * this values as environment variables.
158 static int do_setboardid(cmd_tbl_t *cmdtp, int flag, int argc,
161 unsigned char buf[32];
164 p = get_local_var("IVM_BoardId");
166 printf("can't get the IVM_Boardid\n");
169 sprintf((char *)buf, "%s", p);
170 setenv("boardid", (char *)buf);
171 printf("set boardid=%s\n", buf);
173 p = get_local_var("IVM_HWKey");
175 printf("can't get the IVM_HWKey\n");
178 sprintf((char *)buf, "%s", p);
179 setenv("hwkey", (char *)buf);
180 printf("set hwkey=%s\n", buf);
181 printf("Execute manually saveenv for persistent storage.\n");
186 U_BOOT_CMD(km_setboardid, 1, 0, do_setboardid, "setboardid", "read out bid and "
187 "hwkey from IVM and set in environment");
190 * command km_checkbidhwk
191 * if "boardid" and "hwkey" are not already set in the environment, do:
192 * if a "boardIdListHex" exists in the environment:
193 * - read ivm data for boardid and hwkey
194 * - compare each entry of the boardIdListHex with the
197 * set environment variables boardid, boardId,
198 * hwkey, hwKey to the found values
199 * both (boardid and boardId) are set because
200 * they might be used differently in the
201 * application and in the init scripts (?)
202 * return 0 in case of match, 1 if not match or error
204 static int do_checkboardidhwk(cmd_tbl_t *cmdtp, int flag, int argc,
207 unsigned long ivmbid = 0, ivmhwkey = 0;
208 unsigned long envbid = 0, envhwkey = 0;
210 int verbose = argc > 1 && *argv[1] == 'v';
214 * first read out the real inventory values, these values are
215 * already stored in the local hush variables
217 p = get_local_var("IVM_BoardId");
219 printf("can't get the IVM_Boardid\n");
222 rc = strict_strtoul(p, 16, &ivmbid);
224 p = get_local_var("IVM_HWKey");
226 printf("can't get the IVM_HWKey\n");
229 rc = strict_strtoul(p, 16, &ivmhwkey);
231 if (!ivmbid || !ivmhwkey) {
232 printf("Error: IVM_BoardId and/or IVM_HWKey not set!\n");
236 /* now try to read values from environment if available */
237 p = getenv("boardid");
239 rc = strict_strtoul(p, 16, &envbid);
242 rc = strict_strtoul(p, 16, &envhwkey);
245 printf("strict_strtoul returns error: %d", rc);
249 if (!envbid || !envhwkey) {
251 * BoardId/HWkey not available in the environment, so try the
252 * environment variable for BoardId/HWkey list
254 char *bidhwklist = getenv("boardIdListHex");
258 char *rest = bidhwklist;
262 printf("IVM_BoardId: %ld, IVM_HWKey=%ld\n",
264 printf("boardIdHwKeyList: %s\n",
268 /* loop over each bid/hwkey pair in the list */
269 unsigned long bid = 0;
270 unsigned long hwkey = 0;
272 while (*rest && !isxdigit(*rest))
275 * use simple_strtoul because we need &end and
276 * we know we got non numeric char at the end
278 bid = simple_strtoul(rest, &endp, 16);
279 /* BoardId and HWkey are separated with a "_" */
283 * use simple_strtoul because we need
286 hwkey = simple_strtoul(rest, &endp, 16);
288 while (*rest && !isxdigit(*rest))
291 if ((!bid) || (!hwkey)) {
296 printf("trying bid=0x%lX, hwkey=%ld\n",
300 * Compare the values of the found entry in the
301 * list with the valid values which are stored
302 * in the inventory eeprom. If they are equal
303 * set the values in environment variables.
305 if ((bid == ivmbid) && (hwkey == ivmhwkey)) {
311 sprintf(buf, "%lx", bid);
312 setenv("boardid", buf);
313 sprintf(buf, "%lx", hwkey);
314 setenv("hwkey", buf);
316 } /* end while( ! found ) */
320 /* compare now the values */
321 if ((ivmbid == envbid) && (ivmhwkey == envhwkey)) {
322 printf("boardid=0x%3lX, hwkey=%ld\n", envbid, envhwkey);
325 printf("Error: env boardid=0x%3lX, hwkey=%ld\n", envbid,
327 printf(" IVM bId=0x%3lX, hwKey=%ld\n", ivmbid, ivmhwkey);
328 rc = 1; /* don't match */
333 U_BOOT_CMD(km_checkbidhwk, 2, 0, do_checkboardidhwk,
334 "check boardid and hwkey",
335 "[v]\n - check environment parameter "\
336 "\"boardIdListHex\" against stored boardid and hwkey "\
337 "from the IVM\n v: verbose output"
341 * command km_checktestboot
342 * if the testpin of the board is asserted, return 1
345 static int do_checktestboot(cmd_tbl_t *cmdtp, int flag, int argc,
351 int verbose = argc > 1 && *argv[1] == 'v';
353 #if defined(CONFIG_POST)
354 testpin = post_hotkeys_pressed();
355 s = getenv("test_bank");
357 /* when test_bank is not set, act as if testpin is not asserted */
358 testboot = (testpin != 0) && (s);
360 printf("testpin = %d\n", testpin);
361 printf("test_bank = %s\n", s ? s : "not set");
362 printf("boot test app : %s\n", (testboot) ? "yes" : "no");
364 /* return 0 means: testboot, therefore we need the inversion */
368 U_BOOT_CMD(km_checktestboot, 2, 0, do_checktestboot,
369 "check if testpin is asserted",
370 "[v]\n v - verbose output"