1 // SPDX-License-Identifier: GPL-2.0+
4 * Heiko Schocher, DENX Software Engineering, hs@denx.de.
7 * Holger Brunck, Keymile GmbH Hannover, holger.brunck@keymile.com
18 #include <asm/global_data.h>
20 #include <linux/ctype.h>
21 #include <linux/delay.h>
23 #if defined(CONFIG_POST)
29 DECLARE_GLOBAL_DATA_PTR;
32 * Set Keymile specific environment variables
33 * Currently only some memory layout variables are calculated here
34 * ... ------------------------------------------------
35 * ... |@rootfsaddr |@pnvramaddr |@varaddr |@reserved |@END_OF_RAM
36 * ... |<------------------- pram ------------------->|
37 * ... ------------------------------------------------
38 * @END_OF_RAM: denotes the RAM size
39 * @pnvramaddr: Startadress of pseudo non volatile RAM in hex
40 * @pram : preserved ram size in k
41 * @varaddr : startadress for /var mounted into RAM
45 unsigned int pnvramaddr;
48 unsigned int kernelmem;
50 unsigned long rootfssize = 0;
52 pnvramaddr = CONFIG_SYS_SDRAM_BASE + gd->ram_size -
53 CONFIG_KM_RESERVED_PRAM - CONFIG_KM_PHRAM - CONFIG_KM_PNVRAM;
54 env_set_hex("pnvramaddr", pnvramaddr);
56 /* try to read rootfssize (ram image) from environment */
57 p = env_get("rootfssize");
59 strict_strtoul(p, 16, &rootfssize);
60 pram = (rootfssize + CONFIG_KM_RESERVED_PRAM + CONFIG_KM_PHRAM +
61 CONFIG_KM_PNVRAM) / 0x400;
62 env_set_ulong("pram", pram);
64 varaddr = CONFIG_SYS_SDRAM_BASE + gd->ram_size -
65 CONFIG_KM_RESERVED_PRAM - CONFIG_KM_PHRAM;
66 env_set_hex("varaddr", varaddr);
68 kernelmem = gd->ram_size - 0x400 * pram;
69 env_set_hex("kernelmem", kernelmem);
74 #if defined(CONFIG_SYS_I2C_INIT_BOARD)
75 static void i2c_write_start_seq(void)
78 udelay(DELAY_HALF_PERIOD);
80 udelay(DELAY_HALF_PERIOD);
82 udelay(DELAY_HALF_PERIOD);
84 udelay(DELAY_HALF_PERIOD);
88 * I2C is a synchronous protocol and resets of the processor in the middle
89 * of an access can block the I2C Bus until a powerdown of the full unit is
90 * done. This function toggles the SCL until the SCL and SCA line are
91 * released, but max. 16 times, after this a I2C start-sequence is sent.
92 * This I2C Deblocking mechanism was developed by Keymile in association
93 * with Anatech and Atmel in 1998.
95 int i2c_make_abort(void)
107 udelay(DELAY_ABORT_SEQ);
109 udelay(DELAY_ABORT_SEQ);
110 scl_state = get_scl();
111 sda_state = get_sda();
112 if (scl_state && sda_state) {
119 for (i = 0; i < 5; i++)
120 i2c_write_start_seq();
122 /* respect stop setup time */
123 udelay(DELAY_ABORT_SEQ);
125 udelay(DELAY_ABORT_SEQ);
133 * i2c_init_board - reset i2c bus. When the board is powercycled during a
134 * bus transfer it might hang; for details see doc/I2C_Edge_Conditions.
136 void i2c_init_board(void)
138 /* Now run the AbortSequence() */
143 #if defined(CONFIG_KM_COMMON_ETH_INIT)
144 int board_eth_init(struct bd_info *bis)
146 if (ethernet_present())
147 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(struct cmd_tbl *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 strcpy((char *)buf, p);
170 env_set("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 strcpy((char *)buf, p);
179 env_set("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",
187 "read out bid and 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(struct cmd_tbl *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 = env_get("boardid");
239 rc = strict_strtoul(p, 16, &envbid);
240 p = env_get("hwkey");
242 rc = strict_strtoul(p, 16, &envhwkey);
244 printf("strict_strtoul returns error: %d", rc);
248 if (!envbid || !envhwkey) {
250 * BoardId/HWkey not available in the environment, so try the
251 * environment variable for BoardId/HWkey list
253 char *bidhwklist = env_get("boardIdListHex");
257 char *rest = bidhwklist;
261 printf("IVM_BoardId: %ld, IVM_HWKey=%ld\n",
263 printf("boardIdHwKeyList: %s\n", bidhwklist);
266 /* loop over each bid/hwkey pair in the list */
267 unsigned long bid = 0;
268 unsigned long hwkey = 0;
270 while (*rest && !isxdigit(*rest))
273 * use simple_strtoul because we need &end and
274 * we know we got non numeric char at the end
276 bid = simple_strtoul(rest, &endp, 16);
277 /* BoardId and HWkey are separated with a "_" */
281 * use simple_strtoul because we need
284 hwkey = simple_strtoul(rest, &endp, 16);
286 while (*rest && !isxdigit(*rest))
289 if (!bid || !hwkey) {
294 printf("trying bid=0x%lX, hwkey=%ld\n",
298 * Compare the values of the found entry in the
299 * list with the valid values which are stored
300 * in the inventory eeprom. If they are equal
301 * set the values in environment variables.
303 if (bid == ivmbid && hwkey == ivmhwkey) {
307 env_set_hex("boardid", bid);
308 env_set_hex("hwkey", hwkey);
310 } /* end while( ! found ) */
314 /* compare now the values */
315 if (ivmbid == envbid && ivmhwkey == envhwkey) {
316 printf("boardid=0x%3lX, hwkey=%ld\n", envbid, envhwkey);
319 printf("Error: env boardid=0x%3lX, hwkey=%ld\n", envbid,
321 printf(" IVM bId=0x%3lX, hwKey=%ld\n", ivmbid, ivmhwkey);
322 rc = 1; /* don't match */
327 U_BOOT_CMD(km_checkbidhwk, 2, 0, do_checkboardidhwk,
328 "check boardid and hwkey",
329 "[v]\n - check environment parameter \"boardIdListHex\" against stored boardid and hwkey from the IVM\n v: verbose output"
333 * command km_checktestboot
334 * if the testpin of the board is asserted, return 1
337 static int do_checktestboot(struct cmd_tbl *cmdtp, int flag, int argc,
343 int verbose = argc > 1 && *argv[1] == 'v';
345 #if defined(CONFIG_POST)
346 testpin = post_hotkeys_pressed();
349 s = env_get("test_bank");
350 /* when test_bank is not set, act as if testpin is not asserted */
351 testboot = (testpin != 0) && (s);
353 printf("testpin = %d\n", testpin);
354 /* cppcheck-suppress nullPointer */
355 printf("test_bank = %s\n", s ? s : "not set");
356 printf("boot test app : %s\n", (testboot) ? "yes" : "no");
358 /* return 0 means: testboot, therefore we need the inversion */
362 U_BOOT_CMD(km_checktestboot, 2, 0, do_checktestboot,
363 "check if testpin is asserted",
364 "[v]\n v - verbose output"