Merge https://gitlab.denx.de/u-boot/custodians/u-boot-fsl-qoriq
[platform/kernel/u-boot.git] / board / keymile / common / common.c
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/io.h>
19 #include <linux/ctype.h>
20 #include <linux/delay.h>
21
22 #if defined(CONFIG_POST)
23 #include "post.h"
24 #endif
25 #include "common.h"
26 #include <i2c.h>
27
28 DECLARE_GLOBAL_DATA_PTR;
29
30 /*
31  * Set Keymile specific environment variables
32  * Currently only some memory layout variables are calculated here
33  * ... ------------------------------------------------
34  * ... |@rootfsaddr |@pnvramaddr |@varaddr |@reserved |@END_OF_RAM
35  * ... |<------------------- pram ------------------->|
36  * ... ------------------------------------------------
37  * @END_OF_RAM: denotes the RAM size
38  * @pnvramaddr: Startadress of pseudo non volatile RAM in hex
39  * @pram      : preserved ram size in k
40  * @varaddr   : startadress for /var mounted into RAM
41  */
42 int set_km_env(void)
43 {
44         uchar buf[32];
45         unsigned int pnvramaddr;
46         unsigned int pram;
47         unsigned int varaddr;
48         unsigned int kernelmem;
49         char *p;
50         unsigned long rootfssize = 0;
51
52         pnvramaddr = gd->ram_size - CONFIG_KM_RESERVED_PRAM - CONFIG_KM_PHRAM
53                         - CONFIG_KM_PNVRAM;
54         sprintf((char *)buf, "0x%x", pnvramaddr);
55         env_set("pnvramaddr", (char *)buf);
56
57         /* try to read rootfssize (ram image) from environment */
58         p = env_get("rootfssize");
59         if (p != NULL)
60                 strict_strtoul(p, 16, &rootfssize);
61         pram = (rootfssize + CONFIG_KM_RESERVED_PRAM + CONFIG_KM_PHRAM +
62                 CONFIG_KM_PNVRAM) / 0x400;
63         sprintf((char *)buf, "0x%x", pram);
64         env_set("pram", (char *)buf);
65
66         varaddr = gd->ram_size - CONFIG_KM_RESERVED_PRAM - CONFIG_KM_PHRAM;
67         sprintf((char *)buf, "0x%x", varaddr);
68         env_set("varaddr", (char *)buf);
69
70         kernelmem = gd->ram_size - 0x400 * pram;
71         sprintf((char *)buf, "0x%x", kernelmem);
72         env_set("kernelmem", (char *)buf);
73
74         return 0;
75 }
76
77 #if defined(CONFIG_SYS_I2C_INIT_BOARD)
78 static void i2c_write_start_seq(void)
79 {
80         set_sda(1);
81         udelay(DELAY_HALF_PERIOD);
82         set_scl(1);
83         udelay(DELAY_HALF_PERIOD);
84         set_sda(0);
85         udelay(DELAY_HALF_PERIOD);
86         set_scl(0);
87         udelay(DELAY_HALF_PERIOD);
88 }
89
90 /*
91  * I2C is a synchronous protocol and resets of the processor in the middle
92  * of an access can block the I2C Bus until a powerdown of the full unit is
93  * done. This function toggles the SCL until the SCL and SCA line are
94  * released, but max. 16 times, after this a I2C start-sequence is sent.
95  * This I2C Deblocking mechanism was developed by Keymile in association
96  * with Anatech and Atmel in 1998.
97  */
98 int i2c_make_abort(void)
99 {
100         int     scl_state = 0;
101         int     sda_state = 0;
102         int     i = 0;
103         int     ret = 0;
104
105         if (!get_sda()) {
106                 ret = -1;
107                 while (i < 16) {
108                         i++;
109                         set_scl(0);
110                         udelay(DELAY_ABORT_SEQ);
111                         set_scl(1);
112                         udelay(DELAY_ABORT_SEQ);
113                         scl_state = get_scl();
114                         sda_state = get_sda();
115                         if (scl_state && sda_state) {
116                                 ret = 0;
117                                 break;
118                         }
119                 }
120         }
121         if (ret == 0)
122                 for (i = 0; i < 5; i++)
123                         i2c_write_start_seq();
124
125         /* respect stop setup time */
126         udelay(DELAY_ABORT_SEQ);
127         set_scl(1);
128         udelay(DELAY_ABORT_SEQ);
129         set_sda(1);
130         get_sda();
131
132         return ret;
133 }
134
135 /**
136  * i2c_init_board - reset i2c bus. When the board is powercycled during a
137  * bus transfer it might hang; for details see doc/I2C_Edge_Conditions.
138  */
139 void i2c_init_board(void)
140 {
141         /* Now run the AbortSequence() */
142         i2c_make_abort();
143 }
144 #endif
145
146 #if defined(CONFIG_KM_COMMON_ETH_INIT)
147 int board_eth_init(bd_t *bis)
148 {
149         if (ethernet_present())
150                 return cpu_eth_init(bis);
151
152         return -1;
153 }
154 #endif
155
156 /*
157  * do_setboardid command
158  * read out the board id and the hw key from the intventory EEPROM and set
159  * this values as environment variables.
160  */
161 static int do_setboardid(struct cmd_tbl *cmdtp, int flag, int argc,
162                          char *const argv[])
163 {
164         unsigned char buf[32];
165         char *p;
166
167         p = get_local_var("IVM_BoardId");
168         if (p == NULL) {
169                 printf("can't get the IVM_Boardid\n");
170                 return 1;
171         }
172         strcpy((char *)buf, p);
173         env_set("boardid", (char *)buf);
174         printf("set boardid=%s\n", buf);
175
176         p = get_local_var("IVM_HWKey");
177         if (p == NULL) {
178                 printf("can't get the IVM_HWKey\n");
179                 return 1;
180         }
181         strcpy((char *)buf, p);
182         env_set("hwkey", (char *)buf);
183         printf("set hwkey=%s\n", buf);
184         printf("Execute manually saveenv for persistent storage.\n");
185
186         return 0;
187 }
188
189 U_BOOT_CMD(km_setboardid, 1, 0, do_setboardid, "setboardid", "read out bid and "
190                                  "hwkey from IVM and set in environment");
191
192 /*
193  * command km_checkbidhwk
194  *      if "boardid" and "hwkey" are not already set in the environment, do:
195  *              if a "boardIdListHex" exists in the environment:
196  *                      - read ivm data for boardid and hwkey
197  *                      - compare each entry of the boardIdListHex with the
198  *                              IVM data:
199  *                      if match:
200  *                              set environment variables boardid, boardId,
201  *                              hwkey, hwKey to the found values
202  *                              both (boardid and boardId) are set because
203  *                              they might be used differently in the
204  *                              application and in the init scripts (?)
205  *      return 0 in case of match, 1 if not match or error
206  */
207 static int do_checkboardidhwk(struct cmd_tbl *cmdtp, int flag, int argc,
208                               char *const argv[])
209 {
210         unsigned long ivmbid = 0, ivmhwkey = 0;
211         unsigned long envbid = 0, envhwkey = 0;
212         char *p;
213         int verbose = argc > 1 && *argv[1] == 'v';
214         int rc = 0;
215
216         /*
217          * first read out the real inventory values, these values are
218          * already stored in the local hush variables
219          */
220         p = get_local_var("IVM_BoardId");
221         if (p == NULL) {
222                 printf("can't get the IVM_Boardid\n");
223                 return 1;
224         }
225         rc = strict_strtoul(p, 16, &ivmbid);
226
227         p = get_local_var("IVM_HWKey");
228         if (p == NULL) {
229                 printf("can't get the IVM_HWKey\n");
230                 return 1;
231         }
232         rc = strict_strtoul(p, 16, &ivmhwkey);
233
234         if (!ivmbid || !ivmhwkey) {
235                 printf("Error: IVM_BoardId and/or IVM_HWKey not set!\n");
236                 return rc;
237         }
238
239         /* now try to read values from environment if available */
240         p = env_get("boardid");
241         if (p != NULL)
242                 rc = strict_strtoul(p, 16, &envbid);
243         p = env_get("hwkey");
244         if (p != NULL)
245                 rc = strict_strtoul(p, 16, &envhwkey);
246
247         if (rc != 0) {
248                 printf("strict_strtoul returns error: %d", rc);
249                 return rc;
250         }
251
252         if (!envbid || !envhwkey) {
253                 /*
254                  * BoardId/HWkey not available in the environment, so try the
255                  * environment variable for BoardId/HWkey list
256                  */
257                 char *bidhwklist = env_get("boardIdListHex");
258
259                 if (bidhwklist) {
260                         int found = 0;
261                         char *rest = bidhwklist;
262                         char *endp;
263
264                         if (verbose) {
265                                 printf("IVM_BoardId: %ld, IVM_HWKey=%ld\n",
266                                         ivmbid, ivmhwkey);
267                                 printf("boardIdHwKeyList: %s\n",
268                                         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                                         char buf[10];
310
311                                         found = 1;
312                                         envbid   = bid;
313                                         envhwkey = hwkey;
314                                         sprintf(buf, "%lx", bid);
315                                         env_set("boardid", buf);
316                                         sprintf(buf, "%lx", hwkey);
317                                         env_set("hwkey", buf);
318                                 }
319                         } /* end while( ! found ) */
320                 }
321         }
322
323         /* compare now the values */
324         if ((ivmbid == envbid) && (ivmhwkey == envhwkey)) {
325                 printf("boardid=0x%3lX, hwkey=%ld\n", envbid, envhwkey);
326                 rc = 0; /* match */
327         } else {
328                 printf("Error: env boardid=0x%3lX, hwkey=%ld\n", envbid,
329                         envhwkey);
330                 printf("       IVM bId=0x%3lX, hwKey=%ld\n", ivmbid, ivmhwkey);
331                 rc = 1; /* don't match */
332         }
333         return rc;
334 }
335
336 U_BOOT_CMD(km_checkbidhwk, 2, 0, do_checkboardidhwk,
337                 "check boardid and hwkey",
338                 "[v]\n  - check environment parameter "\
339                 "\"boardIdListHex\" against stored boardid and hwkey "\
340                 "from the IVM\n    v: verbose output"
341 );
342
343 /*
344  * command km_checktestboot
345  *  if the testpin of the board is asserted, return 1
346  *  *   else return 0
347  */
348 static int do_checktestboot(struct cmd_tbl *cmdtp, int flag, int argc,
349                             char *const argv[])
350 {
351         int testpin = 0;
352         char *s = NULL;
353         int testboot = 0;
354         int verbose = argc > 1 && *argv[1] == 'v';
355
356 #if defined(CONFIG_POST)
357         testpin = post_hotkeys_pressed();
358 #endif
359         s = env_get("test_bank");
360         /* when test_bank is not set, act as if testpin is not asserted */
361         testboot = (testpin != 0) && (s);
362         if (verbose) {
363                 printf("testpin   = %d\n", testpin);
364                 /* cppcheck-suppress nullPointer */
365                 printf("test_bank = %s\n", s ? s : "not set");
366                 printf("boot test app : %s\n", (testboot) ? "yes" : "no");
367         }
368         /* return 0 means: testboot, therefore we need the inversion */
369         return !testboot;
370 }
371
372 U_BOOT_CMD(km_checktestboot, 2, 0, do_checktestboot,
373                 "check if testpin is asserted",
374                 "[v]\n  v - verbose output"
375 );