1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * (C) Copyright 2008
4 * Heiko Schocher, DENX Software Engineering, hs@denx.de.
5 *
6 * (C) Copyright 2011
7 * Holger Brunck, Keymile GmbH Hannover, holger.brunck@keymile.com
8 */
9
10 #include <common.h>
11 #include <env.h>
12 #include <ioports.h>
13 #include <command.h>
14 #include <malloc.h>
15 #include <cli_hush.h>
16 #include <net.h>
17 #include <netdev.h>
18 #include <asm/global_data.h>
19 #include <asm/io.h>
20 #include <linux/ctype.h>
21 #include <linux/delay.h>
22 #include <linux/bug.h>
23 #include <bootcount.h>
24
25 #if defined(CONFIG_POST)
26 #include "post.h"
27 #endif
28 #include "common.h"
29 #include <i2c.h>
30
31 DECLARE_GLOBAL_DATA_PTR;
32
33 /*
34 * Set Keymile specific environment variables
35 * Currently only some memory layout variables are calculated here
36 * ... ------------------------------------------------
37 * ... |@rootfsaddr |@pnvramaddr |@varaddr |@reserved |@END_OF_RAM
38 * ... |<------------------- pram ------------------->|
39 * ... ------------------------------------------------
40 * @END_OF_RAM: denotes the RAM size
41 * @pnvramaddr: Startadress of pseudo non volatile RAM in hex
42 * @pram : preserved ram size in k
43 * @varaddr : startadress for /var mounted into RAM
44 */
set_km_env(void)45 int set_km_env(void)
46 {
47 unsigned int pnvramaddr;
48 unsigned int pram;
49 unsigned int varaddr;
50 unsigned int kernelmem;
51 unsigned long rootfssize = 0;
52 char envval[16];
53 char *p;
54
55 pnvramaddr = CFG_SYS_SDRAM_BASE + gd->ram_size -
56 CONFIG_KM_RESERVED_PRAM - CONFIG_KM_PHRAM - CONFIG_KM_PNVRAM;
57 sprintf(envval, "0x%x", pnvramaddr);
58 env_set("pnvramaddr", envval);
59
60 /* try to read rootfssize (ram image) from environment */
61 p = env_get("rootfssize");
62 if (p)
63 strict_strtoul(p, 16, &rootfssize);
64 pram = (rootfssize + CONFIG_KM_RESERVED_PRAM + CONFIG_KM_PHRAM +
65 CONFIG_KM_PNVRAM) / 0x400;
66 env_set_ulong("pram", pram);
67
68 varaddr = CFG_SYS_SDRAM_BASE + gd->ram_size -
69 CONFIG_KM_RESERVED_PRAM - CONFIG_KM_PHRAM;
70 env_set_hex("varaddr", varaddr);
71 sprintf(envval, "0x%x", varaddr);
72 env_set("varaddr", envval);
73
74 kernelmem = gd->ram_size - 0x400 * pram;
75 sprintf(envval, "0x%x", kernelmem);
76 env_set("kernelmem", envval);
77
78 return 0;
79 }
80
81 #if IS_ENABLED(CONFIG_PG_WCOM_UBOOT_UPDATE_SUPPORTED)
82 #if ((!IS_ENABLED(CONFIG_PG_WCOM_UBOOT_BOOTPACKAGE) && \
83 !IS_ENABLED(CONFIG_PG_WCOM_UBOOT_UPDATE)) || \
84 (IS_ENABLED(CONFIG_PG_WCOM_UBOOT_BOOTPACKAGE) && \
85 IS_ENABLED(CONFIG_PG_WCOM_UBOOT_UPDATE)))
86 #error "It has to be either bootpackage or update u-boot image!"
87 #endif
check_for_uboot_update(void)88 void check_for_uboot_update(void)
89 {
90 void (*uboot_update_entry)(void) =
91 (void (*)(void)) CONFIG_PG_WCOM_UBOOT_UPDATE_TEXT_BASE;
92 char *isupdated = env_get("updateduboot");
93 ulong bootcount = bootcount_load();
94 ulong ebootcount = 0;
95
96 if (IS_ENABLED(CONFIG_PG_WCOM_UBOOT_BOOTPACKAGE)) {
97 /*
98 * When running in factory burned u-boot move to the updated
99 * u-boot version only if updateduboot envvar is set to 'yes'
100 * and bootcount limit is not exceeded.
101 * Board must be able to start in factory bootloader mode!
102 */
103 if (isupdated && !strncmp(isupdated, "yes", 3) &&
104 bootcount <= CONFIG_BOOTCOUNT_BOOTLIMIT) {
105 printf("Check update: update detected, ");
106 printf("starting new image @%08x ...\n",
107 CONFIG_PG_WCOM_UBOOT_UPDATE_TEXT_BASE);
108 ebootcount = early_bootcount_load();
109 if (ebootcount <= CONFIG_BOOTCOUNT_BOOTLIMIT) {
110 early_bootcount_store(++ebootcount);
111 uboot_update_entry();
112 } else {
113 printf("Check update: warning: ");
114 printf("early bootcount exceeded (%lu)\n",
115 ebootcount);
116 }
117 }
118 printf("Check update: starting factory image @%08x ...\n",
119 CONFIG_TEXT_BASE);
120 } else if (IS_ENABLED(CONFIG_PG_WCOM_UBOOT_UPDATE)) {
121 /*
122 * When running in field updated u-boot, make sure that
123 * bootcount limit is never exceeded. Must never happen!
124 */
125 WARN_ON(bootcount > CONFIG_BOOTCOUNT_BOOTLIMIT);
126 printf("Check update: updated u-boot starting @%08x ...\n",
127 CONFIG_TEXT_BASE);
128 }
129 }
130 #endif
131
132 #if defined(CONFIG_SYS_I2C_INIT_BOARD)
i2c_write_start_seq(void)133 static void i2c_write_start_seq(void)
134 {
135 set_sda(1);
136 udelay(DELAY_HALF_PERIOD);
137 set_scl(1);
138 udelay(DELAY_HALF_PERIOD);
139 set_sda(0);
140 udelay(DELAY_HALF_PERIOD);
141 set_scl(0);
142 udelay(DELAY_HALF_PERIOD);
143 }
144
145 /*
146 * I2C is a synchronous protocol and resets of the processor in the middle
147 * of an access can block the I2C Bus until a powerdown of the full unit is
148 * done. This function toggles the SCL until the SCL and SCA line are
149 * released, but max. 16 times, after this a I2C start-sequence is sent.
150 * This I2C Deblocking mechanism was developed by Keymile in association
151 * with Anatech and Atmel in 1998.
152 */
i2c_make_abort(void)153 int i2c_make_abort(void)
154 {
155 int scl_state = 0;
156 int sda_state = 0;
157 int i = 0;
158 int ret = 0;
159
160 if (!get_sda()) {
161 ret = -1;
162 while (i < 16) {
163 i++;
164 set_scl(0);
165 udelay(DELAY_ABORT_SEQ);
166 set_scl(1);
167 udelay(DELAY_ABORT_SEQ);
168 scl_state = get_scl();
169 sda_state = get_sda();
170 if (scl_state && sda_state) {
171 ret = 0;
172 break;
173 }
174 }
175 }
176 if (ret == 0)
177 for (i = 0; i < 5; i++)
178 i2c_write_start_seq();
179
180 /* respect stop setup time */
181 udelay(DELAY_ABORT_SEQ);
182 set_scl(1);
183 udelay(DELAY_ABORT_SEQ);
184 set_sda(1);
185 get_sda();
186
187 return ret;
188 }
189
190 /**
191 * i2c_init_board - reset i2c bus. When the board is powercycled during a
192 * bus transfer it might hang; for details see doc/I2C_Edge_Conditions.
193 */
i2c_init_board(void)194 void i2c_init_board(void)
195 {
196 /* Now run the AbortSequence() */
197 i2c_make_abort();
198 }
199 #endif
200
201 #if defined(CONFIG_KM_COMMON_ETH_INIT)
board_eth_init(struct bd_info * bis)202 int board_eth_init(struct bd_info *bis)
203 {
204 if (ethernet_present())
205 return cpu_eth_init(bis);
206
207 return -1;
208 }
209 #endif
210
211 /*
212 * do_setboardid command
213 * read out the board id and the hw key from the intventory EEPROM and set
214 * this values as environment variables.
215 */
do_setboardid(struct cmd_tbl * cmdtp,int flag,int argc,char * const argv[])216 static int do_setboardid(struct cmd_tbl *cmdtp, int flag, int argc,
217 char *const argv[])
218 {
219 unsigned char buf[32];
220 char *p;
221
222 p = get_local_var("IVM_BoardId");
223 if (!p) {
224 printf("can't get the IVM_Boardid\n");
225 return 1;
226 }
227 strcpy((char *)buf, p);
228 env_set("boardid", (char *)buf);
229 printf("set boardid=%s\n", buf);
230
231 p = get_local_var("IVM_HWKey");
232 if (!p) {
233 printf("can't get the IVM_HWKey\n");
234 return 1;
235 }
236 strcpy((char *)buf, p);
237 env_set("hwkey", (char *)buf);
238 printf("set hwkey=%s\n", buf);
239 printf("Execute manually saveenv for persistent storage.\n");
240
241 return 0;
242 }
243
244 U_BOOT_CMD(km_setboardid, 1, 0, do_setboardid, "setboardid",
245 "read out bid and hwkey from IVM and set in environment");
246
247 /*
248 * command km_checkbidhwk
249 * if "boardid" and "hwkey" are not already set in the environment, do:
250 * if a "boardIdListHex" exists in the environment:
251 * - read ivm data for boardid and hwkey
252 * - compare each entry of the boardIdListHex with the
253 * IVM data:
254 * if match:
255 * set environment variables boardid, boardId,
256 * hwkey, hwKey to the found values
257 * both (boardid and boardId) are set because
258 * they might be used differently in the
259 * application and in the init scripts (?)
260 * return 0 in case of match, 1 if not match or error
261 */
do_checkboardidhwk(struct cmd_tbl * cmdtp,int flag,int argc,char * const argv[])262 static int do_checkboardidhwk(struct cmd_tbl *cmdtp, int flag, int argc,
263 char *const argv[])
264 {
265 unsigned long ivmbid = 0, ivmhwkey = 0;
266 unsigned long envbid = 0, envhwkey = 0;
267 char *p;
268 int verbose = argc > 1 && *argv[1] == 'v';
269 int rc = 0;
270
271 /*
272 * first read out the real inventory values, these values are
273 * already stored in the local hush variables
274 */
275 p = get_local_var("IVM_BoardId");
276 if (!p) {
277 printf("can't get the IVM_Boardid\n");
278 return 1;
279 }
280 rc = strict_strtoul(p, 16, &ivmbid);
281
282 p = get_local_var("IVM_HWKey");
283 if (!p) {
284 printf("can't get the IVM_HWKey\n");
285 return 1;
286 }
287 rc = strict_strtoul(p, 16, &ivmhwkey);
288
289 if (!ivmbid || !ivmhwkey) {
290 printf("Error: IVM_BoardId and/or IVM_HWKey not set!\n");
291 return rc;
292 }
293
294 /* now try to read values from environment if available */
295 p = env_get("boardid");
296 if (p)
297 rc = strict_strtoul(p, 16, &envbid);
298 p = env_get("hwkey");
299 if (p)
300 rc = strict_strtoul(p, 16, &envhwkey);
301 if (rc != 0) {
302 printf("strict_strtoul returns error: %d", rc);
303 return rc;
304 }
305
306 if (!envbid || !envhwkey) {
307 /*
308 * BoardId/HWkey not available in the environment, so try the
309 * environment variable for BoardId/HWkey list
310 */
311 char *bidhwklist = env_get("boardIdListHex");
312
313 if (bidhwklist) {
314 int found = 0;
315 char *rest = bidhwklist;
316 char *endp;
317
318 if (verbose) {
319 printf("IVM_BoardId: %ld, IVM_HWKey=%ld\n",
320 ivmbid, ivmhwkey);
321 printf("boardIdHwKeyList: %s\n", bidhwklist);
322 }
323 while (!found) {
324 /* loop over each bid/hwkey pair in the list */
325 unsigned long bid = 0;
326 unsigned long hwkey = 0;
327
328 while (*rest && !isxdigit(*rest))
329 rest++;
330 /*
331 * use simple_strtoul because we need &end and
332 * we know we got non numeric char at the end
333 */
334 bid = hextoul(rest, &endp);
335 /* BoardId and HWkey are separated with a "_" */
336 if (*endp == '_') {
337 rest = endp + 1;
338 /*
339 * use simple_strtoul because we need
340 * &end
341 */
342 hwkey = hextoul(rest, &endp);
343 rest = endp;
344 while (*rest && !isxdigit(*rest))
345 rest++;
346 }
347 if (!bid || !hwkey) {
348 /* end of list */
349 break;
350 }
351 if (verbose) {
352 printf("trying bid=0x%lX, hwkey=%ld\n",
353 bid, hwkey);
354 }
355 /*
356 * Compare the values of the found entry in the
357 * list with the valid values which are stored
358 * in the inventory eeprom. If they are equal
359 * set the values in environment variables.
360 */
361 if (bid == ivmbid && hwkey == ivmhwkey) {
362 found = 1;
363 envbid = bid;
364 envhwkey = hwkey;
365 env_set_hex("boardid", bid);
366 env_set_hex("hwkey", hwkey);
367 }
368 } /* end while( ! found ) */
369 }
370 }
371
372 /* compare now the values */
373 if (ivmbid == envbid && ivmhwkey == envhwkey) {
374 printf("boardid=0x%3lX, hwkey=%ld\n", envbid, envhwkey);
375 rc = 0; /* match */
376 } else {
377 printf("Error: env boardid=0x%3lX, hwkey=%ld\n", envbid,
378 envhwkey);
379 printf(" IVM bId=0x%3lX, hwKey=%ld\n", ivmbid, ivmhwkey);
380 rc = 1; /* don't match */
381 }
382 return rc;
383 }
384
385 U_BOOT_CMD(km_checkbidhwk, 2, 0, do_checkboardidhwk,
386 "check boardid and hwkey",
387 "[v]\n - check environment parameter \"boardIdListHex\" against stored boardid and hwkey from the IVM\n v: verbose output"
388 );
389
390 /*
391 * command km_checktestboot
392 * if the testpin of the board is asserted, return 1
393 * * else return 0
394 */
do_checktestboot(struct cmd_tbl * cmdtp,int flag,int argc,char * const argv[])395 static int do_checktestboot(struct cmd_tbl *cmdtp, int flag, int argc,
396 char *const argv[])
397 {
398 int testpin = 0;
399 char *s = NULL;
400 int testboot = 0;
401 int verbose = argc > 1 && *argv[1] == 'v';
402
403 #if defined(CONFIG_POST)
404 testpin = post_hotkeys_pressed();
405 #endif
406
407 s = env_get("test_bank");
408 /* when test_bank is not set, act as if testpin is not asserted */
409 testboot = (testpin != 0) && (s);
410 if (verbose) {
411 printf("testpin = %d\n", testpin);
412 /* cppcheck-suppress nullPointer */
413 printf("test_bank = %s\n", s ? s : "not set");
414 printf("boot test app : %s\n", (testboot) ? "yes" : "no");
415 }
416 /* return 0 means: testboot, therefore we need the inversion */
417 return !testboot;
418 }
419
420 U_BOOT_CMD(km_checktestboot, 2, 0, do_checktestboot,
421 "check if testpin is asserted",
422 "[v]\n v - verbose output"
423 );
424