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
23 #if defined(CONFIG_POST)
24 #include "post.h"
25 #endif
26 #include "common.h"
27 #include <i2c.h>
28
29 DECLARE_GLOBAL_DATA_PTR;
30
31 /*
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
42 */
set_km_env(void)43 int set_km_env(void)
44 {
45 unsigned int pnvramaddr;
46 unsigned int pram;
47 unsigned int varaddr;
48 unsigned int kernelmem;
49 unsigned long rootfssize = 0;
50 char envval[16];
51 char *p;
52
53 pnvramaddr = CONFIG_SYS_SDRAM_BASE + gd->ram_size -
54 CONFIG_KM_RESERVED_PRAM - CONFIG_KM_PHRAM - CONFIG_KM_PNVRAM;
55 sprintf(envval, "0x%x", pnvramaddr);
56 env_set("pnvramaddr", envval);
57
58 /* try to read rootfssize (ram image) from environment */
59 p = env_get("rootfssize");
60 if (p)
61 strict_strtoul(p, 16, &rootfssize);
62 pram = (rootfssize + CONFIG_KM_RESERVED_PRAM + CONFIG_KM_PHRAM +
63 CONFIG_KM_PNVRAM) / 0x400;
64 env_set_ulong("pram", pram);
65
66 varaddr = CONFIG_SYS_SDRAM_BASE + gd->ram_size -
67 CONFIG_KM_RESERVED_PRAM - CONFIG_KM_PHRAM;
68 env_set_hex("varaddr", varaddr);
69 sprintf(envval, "0x%x", varaddr);
70 env_set("varaddr", envval);
71
72 kernelmem = gd->ram_size - 0x400 * pram;
73 sprintf(envval, "0x%x", kernelmem);
74 env_set("kernelmem", envval);
75
76 return 0;
77 }
78
79 #if defined(CONFIG_SYS_I2C_INIT_BOARD)
i2c_write_start_seq(void)80 static void i2c_write_start_seq(void)
81 {
82 set_sda(1);
83 udelay(DELAY_HALF_PERIOD);
84 set_scl(1);
85 udelay(DELAY_HALF_PERIOD);
86 set_sda(0);
87 udelay(DELAY_HALF_PERIOD);
88 set_scl(0);
89 udelay(DELAY_HALF_PERIOD);
90 }
91
92 /*
93 * I2C is a synchronous protocol and resets of the processor in the middle
94 * of an access can block the I2C Bus until a powerdown of the full unit is
95 * done. This function toggles the SCL until the SCL and SCA line are
96 * released, but max. 16 times, after this a I2C start-sequence is sent.
97 * This I2C Deblocking mechanism was developed by Keymile in association
98 * with Anatech and Atmel in 1998.
99 */
i2c_make_abort(void)100 int i2c_make_abort(void)
101 {
102 int scl_state = 0;
103 int sda_state = 0;
104 int i = 0;
105 int ret = 0;
106
107 if (!get_sda()) {
108 ret = -1;
109 while (i < 16) {
110 i++;
111 set_scl(0);
112 udelay(DELAY_ABORT_SEQ);
113 set_scl(1);
114 udelay(DELAY_ABORT_SEQ);
115 scl_state = get_scl();
116 sda_state = get_sda();
117 if (scl_state && sda_state) {
118 ret = 0;
119 break;
120 }
121 }
122 }
123 if (ret == 0)
124 for (i = 0; i < 5; i++)
125 i2c_write_start_seq();
126
127 /* respect stop setup time */
128 udelay(DELAY_ABORT_SEQ);
129 set_scl(1);
130 udelay(DELAY_ABORT_SEQ);
131 set_sda(1);
132 get_sda();
133
134 return ret;
135 }
136
137 /**
138 * i2c_init_board - reset i2c bus. When the board is powercycled during a
139 * bus transfer it might hang; for details see doc/I2C_Edge_Conditions.
140 */
i2c_init_board(void)141 void i2c_init_board(void)
142 {
143 /* Now run the AbortSequence() */
144 i2c_make_abort();
145 }
146 #endif
147
148 #if defined(CONFIG_KM_COMMON_ETH_INIT)
board_eth_init(struct bd_info * bis)149 int board_eth_init(struct bd_info *bis)
150 {
151 if (ethernet_present())
152 return cpu_eth_init(bis);
153
154 return -1;
155 }
156 #endif
157
158 /*
159 * do_setboardid command
160 * read out the board id and the hw key from the intventory EEPROM and set
161 * this values as environment variables.
162 */
do_setboardid(struct cmd_tbl * cmdtp,int flag,int argc,char * const argv[])163 static int do_setboardid(struct cmd_tbl *cmdtp, int flag, int argc,
164 char *const argv[])
165 {
166 unsigned char buf[32];
167 char *p;
168
169 p = get_local_var("IVM_BoardId");
170 if (!p) {
171 printf("can't get the IVM_Boardid\n");
172 return 1;
173 }
174 strcpy((char *)buf, p);
175 env_set("boardid", (char *)buf);
176 printf("set boardid=%s\n", buf);
177
178 p = get_local_var("IVM_HWKey");
179 if (!p) {
180 printf("can't get the IVM_HWKey\n");
181 return 1;
182 }
183 strcpy((char *)buf, p);
184 env_set("hwkey", (char *)buf);
185 printf("set hwkey=%s\n", buf);
186 printf("Execute manually saveenv for persistent storage.\n");
187
188 return 0;
189 }
190
191 U_BOOT_CMD(km_setboardid, 1, 0, do_setboardid, "setboardid",
192 "read out bid and hwkey from IVM and set in environment");
193
194 /*
195 * command km_checkbidhwk
196 * if "boardid" and "hwkey" are not already set in the environment, do:
197 * if a "boardIdListHex" exists in the environment:
198 * - read ivm data for boardid and hwkey
199 * - compare each entry of the boardIdListHex with the
200 * IVM data:
201 * if match:
202 * set environment variables boardid, boardId,
203 * hwkey, hwKey to the found values
204 * both (boardid and boardId) are set because
205 * they might be used differently in the
206 * application and in the init scripts (?)
207 * return 0 in case of match, 1 if not match or error
208 */
do_checkboardidhwk(struct cmd_tbl * cmdtp,int flag,int argc,char * const argv[])209 static int do_checkboardidhwk(struct cmd_tbl *cmdtp, int flag, int argc,
210 char *const argv[])
211 {
212 unsigned long ivmbid = 0, ivmhwkey = 0;
213 unsigned long envbid = 0, envhwkey = 0;
214 char *p;
215 int verbose = argc > 1 && *argv[1] == 'v';
216 int rc = 0;
217
218 /*
219 * first read out the real inventory values, these values are
220 * already stored in the local hush variables
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 rc = strict_strtoul(p, 16, &ivmbid);
228
229 p = get_local_var("IVM_HWKey");
230 if (!p) {
231 printf("can't get the IVM_HWKey\n");
232 return 1;
233 }
234 rc = strict_strtoul(p, 16, &ivmhwkey);
235
236 if (!ivmbid || !ivmhwkey) {
237 printf("Error: IVM_BoardId and/or IVM_HWKey not set!\n");
238 return rc;
239 }
240
241 /* now try to read values from environment if available */
242 p = env_get("boardid");
243 if (p)
244 rc = strict_strtoul(p, 16, &envbid);
245 p = env_get("hwkey");
246 if (p)
247 rc = strict_strtoul(p, 16, &envhwkey);
248 if (rc != 0) {
249 printf("strict_strtoul returns error: %d", rc);
250 return rc;
251 }
252
253 if (!envbid || !envhwkey) {
254 /*
255 * BoardId/HWkey not available in the environment, so try the
256 * environment variable for BoardId/HWkey list
257 */
258 char *bidhwklist = env_get("boardIdListHex");
259
260 if (bidhwklist) {
261 int found = 0;
262 char *rest = bidhwklist;
263 char *endp;
264
265 if (verbose) {
266 printf("IVM_BoardId: %ld, IVM_HWKey=%ld\n",
267 ivmbid, ivmhwkey);
268 printf("boardIdHwKeyList: %s\n", bidhwklist);
269 }
270 while (!found) {
271 /* loop over each bid/hwkey pair in the list */
272 unsigned long bid = 0;
273 unsigned long hwkey = 0;
274
275 while (*rest && !isxdigit(*rest))
276 rest++;
277 /*
278 * use simple_strtoul because we need &end and
279 * we know we got non numeric char at the end
280 */
281 bid = simple_strtoul(rest, &endp, 16);
282 /* BoardId and HWkey are separated with a "_" */
283 if (*endp == '_') {
284 rest = endp + 1;
285 /*
286 * use simple_strtoul because we need
287 * &end
288 */
289 hwkey = simple_strtoul(rest, &endp, 16);
290 rest = endp;
291 while (*rest && !isxdigit(*rest))
292 rest++;
293 }
294 if (!bid || !hwkey) {
295 /* end of list */
296 break;
297 }
298 if (verbose) {
299 printf("trying bid=0x%lX, hwkey=%ld\n",
300 bid, hwkey);
301 }
302 /*
303 * Compare the values of the found entry in the
304 * list with the valid values which are stored
305 * in the inventory eeprom. If they are equal
306 * set the values in environment variables.
307 */
308 if (bid == ivmbid && hwkey == ivmhwkey) {
309 found = 1;
310 envbid = bid;
311 envhwkey = hwkey;
312 env_set_hex("boardid", bid);
313 env_set_hex("hwkey", hwkey);
314 }
315 } /* end while( ! found ) */
316 }
317 }
318
319 /* compare now the values */
320 if (ivmbid == envbid && ivmhwkey == envhwkey) {
321 printf("boardid=0x%3lX, hwkey=%ld\n", envbid, envhwkey);
322 rc = 0; /* match */
323 } else {
324 printf("Error: env boardid=0x%3lX, hwkey=%ld\n", envbid,
325 envhwkey);
326 printf(" IVM bId=0x%3lX, hwKey=%ld\n", ivmbid, ivmhwkey);
327 rc = 1; /* don't match */
328 }
329 return rc;
330 }
331
332 U_BOOT_CMD(km_checkbidhwk, 2, 0, do_checkboardidhwk,
333 "check boardid and hwkey",
334 "[v]\n - check environment parameter \"boardIdListHex\" against stored boardid and hwkey from the IVM\n v: verbose output"
335 );
336
337 /*
338 * command km_checktestboot
339 * if the testpin of the board is asserted, return 1
340 * * else return 0
341 */
do_checktestboot(struct cmd_tbl * cmdtp,int flag,int argc,char * const argv[])342 static int do_checktestboot(struct cmd_tbl *cmdtp, int flag, int argc,
343 char *const argv[])
344 {
345 int testpin = 0;
346 char *s = NULL;
347 int testboot = 0;
348 int verbose = argc > 1 && *argv[1] == 'v';
349
350 #if defined(CONFIG_POST)
351 testpin = post_hotkeys_pressed();
352 #endif
353
354 s = env_get("test_bank");
355 /* when test_bank is not set, act as if testpin is not asserted */
356 testboot = (testpin != 0) && (s);
357 if (verbose) {
358 printf("testpin = %d\n", testpin);
359 /* cppcheck-suppress nullPointer */
360 printf("test_bank = %s\n", s ? s : "not set");
361 printf("boot test app : %s\n", (testboot) ? "yes" : "no");
362 }
363 /* return 0 means: testboot, therefore we need the inversion */
364 return !testboot;
365 }
366
367 U_BOOT_CMD(km_checktestboot, 2, 0, do_checktestboot,
368 "check if testpin is asserted",
369 "[v]\n v - verbose output"
370 );
371