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1 /*
2  * (C) Copyright 2008
3  * Heiko Schocher, DENX Software Engineering, hs@denx.de.
4  *
5  * (C) Copyright 2011
6  * Holger Brunck, Keymile GmbH Hannover, holger.brunck@keymile.com
7  *
8  * SPDX-License-Identifier:     GPL-2.0+
9  */
10
11 #include <common.h>
12 #include <ioports.h>
13 #include <command.h>
14 #include <malloc.h>
15 #include <hush.h>
16 #include <net.h>
17 #include <netdev.h>
18 #include <asm/io.h>
19 #include <linux/ctype.h>
20
21 #if defined(CONFIG_POST)
22 #include "post.h"
23 #endif
24 #include "common.h"
25 #include <i2c.h>
26
27 #if !defined(CONFIG_MPC83xx)
28 static void i2c_write_start_seq(void);
29 #endif
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  */
45 int set_km_env(void)
46 {
47         uchar buf[32];
48         unsigned int pnvramaddr;
49         unsigned int pram;
50         unsigned int varaddr;
51         unsigned int kernelmem;
52         char *p;
53         unsigned long rootfssize = 0;
54
55         pnvramaddr = gd->ram_size - CONFIG_KM_RESERVED_PRAM - CONFIG_KM_PHRAM
56                         - CONFIG_KM_PNVRAM;
57         sprintf((char *)buf, "0x%x", pnvramaddr);
58         setenv("pnvramaddr", (char *)buf);
59
60         /* try to read rootfssize (ram image) from envrionment */
61         p = getenv("rootfssize");
62         if (p != NULL)
63                 strict_strtoul(p, 16, &rootfssize);
64         pram = (rootfssize + CONFIG_KM_RESERVED_PRAM + CONFIG_KM_PHRAM +
65                 CONFIG_KM_PNVRAM) / 0x400;
66         sprintf((char *)buf, "0x%x", pram);
67         setenv("pram", (char *)buf);
68
69         varaddr = gd->ram_size - CONFIG_KM_RESERVED_PRAM - CONFIG_KM_PHRAM;
70         sprintf((char *)buf, "0x%x", varaddr);
71         setenv("varaddr", (char *)buf);
72
73         kernelmem = gd->ram_size - 0x400 * pram;
74         sprintf((char *)buf, "0x%x", kernelmem);
75         setenv("kernelmem", (char *)buf);
76
77         return 0;
78 }
79
80 #if defined(CONFIG_SYS_I2C_INIT_BOARD)
81 #if !defined(CONFIG_MPC83xx)
82 static void i2c_write_start_seq(void)
83 {
84         set_sda(1);
85         udelay(DELAY_HALF_PERIOD);
86         set_scl(1);
87         udelay(DELAY_HALF_PERIOD);
88         set_sda(0);
89         udelay(DELAY_HALF_PERIOD);
90         set_scl(0);
91         udelay(DELAY_HALF_PERIOD);
92 }
93
94 /*
95  * I2C is a synchronous protocol and resets of the processor in the middle
96  * of an access can block the I2C Bus until a powerdown of the full unit is
97  * done. This function toggles the SCL until the SCL and SCA line are
98  * released, but max. 16 times, after this a I2C start-sequence is sent.
99  * This I2C Deblocking mechanism was developed by Keymile in association
100  * with Anatech and Atmel in 1998.
101  */
102 int i2c_make_abort(void)
103 {
104
105 #if defined(CONFIG_HARD_I2C) && !defined(MACH_TYPE_KM_KIRKWOOD)
106         immap_t *immap = (immap_t *)CONFIG_SYS_IMMR;
107         i2c8260_t *i2c  = (i2c8260_t *)&immap->im_i2c;
108
109         /*
110          * disable I2C controller first, otherwhise it thinks we want to
111          * talk to the slave port...
112          */
113         clrbits_8(&i2c->i2c_i2mod, 0x01);
114
115         /* Set the PortPins to GPIO */
116         setports(1);
117 #endif
118
119         int     scl_state = 0;
120         int     sda_state = 0;
121         int     i = 0;
122         int     ret = 0;
123
124         if (!get_sda()) {
125                 ret = -1;
126                 while (i < 16) {
127                         i++;
128                         set_scl(0);
129                         udelay(DELAY_ABORT_SEQ);
130                         set_scl(1);
131                         udelay(DELAY_ABORT_SEQ);
132                         scl_state = get_scl();
133                         sda_state = get_sda();
134                         if (scl_state && sda_state) {
135                                 ret = 0;
136                                 break;
137                         }
138                 }
139         }
140         if (ret == 0)
141                 for (i = 0; i < 5; i++)
142                         i2c_write_start_seq();
143
144         /* respect stop setup time */
145         udelay(DELAY_ABORT_SEQ);
146         set_scl(1);
147         udelay(DELAY_ABORT_SEQ);
148         set_sda(1);
149         get_sda();
150
151 #if defined(CONFIG_HARD_I2C)
152         /* Set the PortPins back to use for I2C */
153         setports(0);
154 #endif
155         return ret;
156 }
157 #endif
158
159 /**
160  * i2c_init_board - reset i2c bus. When the board is powercycled during a
161  * bus transfer it might hang; for details see doc/I2C_Edge_Conditions.
162  */
163 void i2c_init_board(void)
164 {
165         /* Now run the AbortSequence() */
166         i2c_make_abort();
167 }
168 #endif
169
170 int board_eth_init(bd_t *bis)
171 {
172         if (ethernet_present())
173                 return cpu_eth_init(bis);
174
175         return -1;
176 }
177
178 /*
179  * do_setboardid command
180  * read out the board id and the hw key from the intventory EEPROM and set
181  * this values as environment variables.
182  */
183 static int do_setboardid(cmd_tbl_t *cmdtp, int flag, int argc,
184                                 char *const argv[])
185 {
186         unsigned char buf[32];
187         char *p;
188
189         p = get_local_var("IVM_BoardId");
190         if (p == NULL) {
191                 printf("can't get the IVM_Boardid\n");
192                 return 1;
193         }
194         sprintf((char *)buf, "%s", p);
195         setenv("boardid", (char *)buf);
196         printf("set boardid=%s\n", buf);
197
198         p = get_local_var("IVM_HWKey");
199         if (p == NULL) {
200                 printf("can't get the IVM_HWKey\n");
201                 return 1;
202         }
203         sprintf((char *)buf, "%s", p);
204         setenv("hwkey", (char *)buf);
205         printf("set hwkey=%s\n", buf);
206         printf("Execute manually saveenv for persistent storage.\n");
207
208         return 0;
209 }
210
211 U_BOOT_CMD(km_setboardid, 1, 0, do_setboardid, "setboardid", "read out bid and "
212                                  "hwkey from IVM and set in environment");
213
214 /*
215  * command km_checkbidhwk
216  *      if "boardid" and "hwkey" are not already set in the environment, do:
217  *              if a "boardIdListHex" exists in the environment:
218  *                      - read ivm data for boardid and hwkey
219  *                      - compare each entry of the boardIdListHex with the
220  *                              IVM data:
221  *                      if match:
222  *                              set environment variables boardid, boardId,
223  *                              hwkey, hwKey to the found values
224  *                              both (boardid and boardId) are set because
225  *                              they might be used differently in the
226  *                              application and in the init scripts (?)
227  *      return 0 in case of match, 1 if not match or error
228  */
229 int do_checkboardidhwk(cmd_tbl_t *cmdtp, int flag, int argc,
230                         char *const argv[])
231 {
232         unsigned long ivmbid = 0, ivmhwkey = 0;
233         unsigned long envbid = 0, envhwkey = 0;
234         char *p;
235         int verbose = argc > 1 && *argv[1] == 'v';
236         int rc = 0;
237
238         /*
239          * first read out the real inventory values, these values are
240          * already stored in the local hush variables
241          */
242         p = get_local_var("IVM_BoardId");
243         if (p == NULL) {
244                 printf("can't get the IVM_Boardid\n");
245                 return 1;
246         }
247         rc = strict_strtoul(p, 16, &ivmbid);
248
249         p = get_local_var("IVM_HWKey");
250         if (p == NULL) {
251                 printf("can't get the IVM_HWKey\n");
252                 return 1;
253         }
254         rc = strict_strtoul(p, 16, &ivmhwkey);
255
256         if (!ivmbid || !ivmhwkey) {
257                 printf("Error: IVM_BoardId and/or IVM_HWKey not set!\n");
258                 return rc;
259         }
260
261         /* now try to read values from environment if available */
262         p = getenv("boardid");
263         if (p != NULL)
264                 rc = strict_strtoul(p, 16, &envbid);
265         p = getenv("hwkey");
266         if (p != NULL)
267                 rc = strict_strtoul(p, 16, &envhwkey);
268
269         if (rc != 0) {
270                 printf("strict_strtoul returns error: %d", rc);
271                 return rc;
272         }
273
274         if (!envbid || !envhwkey) {
275                 /*
276                  * BoardId/HWkey not available in the environment, so try the
277                  * environment variable for BoardId/HWkey list
278                  */
279                 char *bidhwklist = getenv("boardIdListHex");
280
281                 if (bidhwklist) {
282                         int found = 0;
283                         char *rest = bidhwklist;
284                         char *endp;
285
286                         if (verbose) {
287                                 printf("IVM_BoardId: %ld, IVM_HWKey=%ld\n",
288                                         ivmbid, ivmhwkey);
289                                 printf("boardIdHwKeyList: %s\n",
290                                         bidhwklist);
291                         }
292                         while (!found) {
293                                 /* loop over each bid/hwkey pair in the list */
294                                 unsigned long bid   = 0;
295                                 unsigned long hwkey = 0;
296
297                                 while (*rest && !isxdigit(*rest))
298                                         rest++;
299                                 /*
300                                  * use simple_strtoul because we need &end and
301                                  * we know we got non numeric char at the end
302                                  */
303                                 bid = simple_strtoul(rest, &endp, 16);
304                                 /* BoardId and HWkey are separated with a "_" */
305                                 if (*endp == '_') {
306                                         rest  = endp + 1;
307                                         /*
308                                          * use simple_strtoul because we need
309                                          * &end
310                                          */
311                                         hwkey = simple_strtoul(rest, &endp, 16);
312                                         rest  = endp;
313                                         while (*rest && !isxdigit(*rest))
314                                                 rest++;
315                                 }
316                                 if ((!bid) || (!hwkey)) {
317                                         /* end of list */
318                                         break;
319                                 }
320                                 if (verbose) {
321                                         printf("trying bid=0x%lX, hwkey=%ld\n",
322                                                 bid, hwkey);
323                                 }
324                                 /*
325                                  * Compare the values of the found entry in the
326                                  * list with the valid values which are stored
327                                  * in the inventory eeprom. If they are equal
328                                  * set the values in environment variables.
329                                  */
330                                 if ((bid == ivmbid) && (hwkey == ivmhwkey)) {
331                                         char buf[10];
332
333                                         found = 1;
334                                         envbid   = bid;
335                                         envhwkey = hwkey;
336                                         sprintf(buf, "%lx", bid);
337                                         setenv("boardid", buf);
338                                         sprintf(buf, "%lx", hwkey);
339                                         setenv("hwkey", buf);
340                                 }
341                         } /* end while( ! found ) */
342                 }
343         }
344
345         /* compare now the values */
346         if ((ivmbid == envbid) && (ivmhwkey == envhwkey)) {
347                 printf("boardid=0x%3lX, hwkey=%ld\n", envbid, envhwkey);
348                 rc = 0; /* match */
349         } else {
350                 printf("Error: env boardid=0x%3lX, hwkey=%ld\n", envbid,
351                         envhwkey);
352                 printf("       IVM bId=0x%3lX, hwKey=%ld\n", ivmbid, ivmhwkey);
353                 rc = 1; /* don't match */
354         }
355         return rc;
356 }
357
358 U_BOOT_CMD(km_checkbidhwk, 2, 0, do_checkboardidhwk,
359                 "check boardid and hwkey",
360                 "[v]\n  - check environment parameter "\
361                 "\"boardIdListHex\" against stored boardid and hwkey "\
362                 "from the IVM\n    v: verbose output"
363 );
364
365 /*
366  * command km_checktestboot
367  *  if the testpin of the board is asserted, return 1
368  *  *   else return 0
369  */
370 int do_checktestboot(cmd_tbl_t *cmdtp, int flag, int argc,
371                         char *const argv[])
372 {
373         int testpin = 0;
374         char *s = NULL;
375         int testboot = 0;
376         int verbose = argc > 1 && *argv[1] == 'v';
377
378 #if defined(CONFIG_POST)
379         testpin = post_hotkeys_pressed();
380         s = getenv("test_bank");
381 #endif
382         /* when test_bank is not set, act as if testpin is not asserted */
383         testboot = (testpin != 0) && (s);
384         if (verbose) {
385                 printf("testpin   = %d\n", testpin);
386                 printf("test_bank = %s\n", s ? s : "not set");
387                 printf("boot test app : %s\n", (testboot) ? "yes" : "no");
388         }
389         /* return 0 means: testboot, therefore we need the inversion */
390         return !testboot;
391 }
392
393 U_BOOT_CMD(km_checktestboot, 2, 0, do_checktestboot,
394                 "check if testpin is asserted",
395                 "[v]\n  v - verbose output"
396 );