3 * Heiko Schocher, DENX Software Engineering, hs@denx.de.
6 * Holger Brunck, Keymile GmbH Hannover, holger.brunck@keymile.com
8 * See file CREDITS for list of people who contributed to this
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License as
13 * published by the Free Software Foundation; either version 2 of
14 * the License, or (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
35 #include <linux/ctype.h>
37 #if defined(CONFIG_OF_BOARD_SETUP) && defined(CONFIG_OF_LIBFDT)
42 #if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C)
46 static void i2c_write_start_seq(void);
47 DECLARE_GLOBAL_DATA_PTR;
50 * Set Keymile specific environment variables
51 * Currently only some memory layout variables are calculated here
52 * ... ------------------------------------------------
53 * ... |@rootfsaddr |@pnvramaddr |@varaddr |@reserved |@END_OF_RAM
54 * ... |<------------------- pram ------------------->|
55 * ... ------------------------------------------------
56 * @END_OF_RAM: denotes the RAM size
57 * @pnvramaddr: Startadress of pseudo non volatile RAM in hex
58 * @pram : preserved ram size in k
59 * @varaddr : startadress for /var mounted into RAM
64 unsigned int pnvramaddr;
67 unsigned int kernelmem;
69 unsigned long rootfssize = 0;
71 pnvramaddr = gd->ram_size - CONFIG_KM_RESERVED_PRAM - CONFIG_KM_PHRAM
73 sprintf((char *)buf, "0x%x", pnvramaddr);
74 setenv("pnvramaddr", (char *)buf);
76 /* try to read rootfssize (ram image) from envrionment */
77 p = getenv("rootfssize");
79 strict_strtoul(p, 16, &rootfssize);
80 pram = (rootfssize + CONFIG_KM_RESERVED_PRAM + CONFIG_KM_PHRAM +
81 CONFIG_KM_PNVRAM) / 0x400;
82 sprintf((char *)buf, "0x%x", pram);
83 setenv("pram", (char *)buf);
85 varaddr = gd->ram_size - CONFIG_KM_RESERVED_PRAM - CONFIG_KM_PHRAM;
86 sprintf((char *)buf, "0x%x", varaddr);
87 setenv("varaddr", (char *)buf);
89 kernelmem = gd->ram_size - 0x400 * pram;
90 sprintf((char *)buf, "0x%x", kernelmem);
91 setenv("kernelmem", (char *)buf);
96 #define DELAY_ABORT_SEQ 62 /* @200kHz 9 clocks = 44us, 62us is ok */
97 #define DELAY_HALF_PERIOD (500 / (CONFIG_SYS_I2C_SPEED / 1000))
99 #if !defined(CONFIG_MPC83xx)
100 static void i2c_write_start_seq(void)
103 udelay(DELAY_HALF_PERIOD);
105 udelay(DELAY_HALF_PERIOD);
107 udelay(DELAY_HALF_PERIOD);
109 udelay(DELAY_HALF_PERIOD);
113 * I2C is a synchronous protocol and resets of the processor in the middle
114 * of an access can block the I2C Bus until a powerdown of the full unit is
115 * done. This function toggles the SCL until the SCL and SCA line are
116 * released, but max. 16 times, after this a I2C start-sequence is sent.
117 * This I2C Deblocking mechanism was developed by Keymile in association
118 * with Anatech and Atmel in 1998.
120 int i2c_make_abort(void)
123 #if defined(CONFIG_HARD_I2C) && !defined(MACH_TYPE_KM_KIRKWOOD)
124 immap_t *immap = (immap_t *)CONFIG_SYS_IMMR ;
125 i2c8260_t *i2c = (i2c8260_t *)&immap->im_i2c;
128 * disable I2C controller first, otherwhise it thinks we want to
129 * talk to the slave port...
131 clrbits_8(&i2c->i2c_i2mod, 0x01);
133 /* Set the PortPins to GPIO */
147 udelay(DELAY_ABORT_SEQ);
149 udelay(DELAY_ABORT_SEQ);
150 scl_state = get_scl();
151 sda_state = get_sda();
152 if (scl_state && sda_state) {
154 printf("[INFO] i2c abort after %d clocks\n", i);
160 for (i = 0; i < 5; i++)
161 i2c_write_start_seq();
163 printf("[ERROR] i2c abort failed\n");
165 /* respect stop setup time */
166 udelay(DELAY_ABORT_SEQ);
168 udelay(DELAY_ABORT_SEQ);
172 #if defined(CONFIG_HARD_I2C)
173 /* Set the PortPins back to use for I2C */
178 #endif /* !MPC83xx */
180 #if defined(CONFIG_MPC83xx)
181 static void i2c_write_start_seq(void)
184 dev = (struct fsl_i2c *) (CONFIG_SYS_IMMR + CONFIG_SYS_I2C_OFFSET);
185 udelay(DELAY_ABORT_SEQ);
186 out_8(&dev->cr, (I2C_CR_MEN | I2C_CR_MSTA));
187 udelay(DELAY_ABORT_SEQ);
188 out_8(&dev->cr, (I2C_CR_MEN));
191 int i2c_make_abort(void)
194 dev = (struct fsl_i2c *) (CONFIG_SYS_IMMR + CONFIG_SYS_I2C_OFFSET);
201 /* wait after each operation to finsh with a delay */
202 out_8(&dev->cr, (I2C_CR_MSTA));
203 udelay(DELAY_ABORT_SEQ);
204 out_8(&dev->cr, (I2C_CR_MEN | I2C_CR_MSTA));
205 udelay(DELAY_ABORT_SEQ);
206 dummy = in_8(&dev->dr);
207 udelay(DELAY_ABORT_SEQ);
208 last = in_8(&dev->dr);
212 * do read until the last bit is 1, but stop if the full eeprom is
215 while (((last & 0x01) != 0x01) &&
216 (nbr_read < CONFIG_SYS_IVM_EEPROM_MAX_LEN)) {
217 udelay(DELAY_ABORT_SEQ);
218 last = in_8(&dev->dr);
221 if ((last & 0x01) != 0x01)
223 if ((last != 0xff) || (nbr_read > 1))
224 printf("[INFO] i2c abort after %d bytes (0x%02x)\n",
226 udelay(DELAY_ABORT_SEQ);
227 out_8(&dev->cr, (I2C_CR_MEN));
228 udelay(DELAY_ABORT_SEQ);
229 /* clear status reg */
232 for (i = 0; i < 5; i++)
233 i2c_write_start_seq();
235 printf("[ERROR] i2c abort failed after %d bytes (0x%02x)\n",
243 * i2c_init_board - reset i2c bus. When the board is powercycled during a
244 * bus transfer it might hang; for details see doc/I2C_Edge_Conditions.
246 void i2c_init_board(void)
248 /* Now run the AbortSequence() */
252 #if !defined(MACH_TYPE_KM_KIRKWOOD)
253 int ethernet_present(void)
255 struct km_bec_fpga *base =
256 (struct km_bec_fpga *)CONFIG_SYS_KMBEC_FPGA_BASE;
258 return in_8(&base->bprth) & PIGGY_PRESENT;
262 int board_eth_init(bd_t *bis)
264 if (ethernet_present())
265 return cpu_eth_init(bis);
271 * do_setboardid command
272 * read out the board id and the hw key from the intventory EEPROM and set
273 * this values as environment variables.
275 static int do_setboardid(cmd_tbl_t *cmdtp, int flag, int argc,
278 unsigned char buf[32];
281 p = get_local_var("IVM_BoardId");
283 printf("can't get the IVM_Boardid\n");
286 sprintf((char *)buf, "%s", p);
287 setenv("boardid", (char *)buf);
288 printf("set boardid=%s\n", buf);
290 p = get_local_var("IVM_HWKey");
292 printf("can't get the IVM_HWKey\n");
295 sprintf((char *)buf, "%s", p);
296 setenv("hwkey", (char *)buf);
297 printf("set hwkey=%s\n", buf);
298 printf("Execute manually saveenv for persistent storage.\n");
303 U_BOOT_CMD(km_setboardid, 1, 0, do_setboardid, "setboardid", "read out bid and "
304 "hwkey from IVM and set in environment");
307 * command km_checkbidhwk
308 * if "boardid" and "hwkey" are not already set in the environment, do:
309 * if a "boardIdListHex" exists in the environment:
310 * - read ivm data for boardid and hwkey
311 * - compare each entry of the boardIdListHex with the
314 * set environment variables boardid, boardId,
315 * hwkey, hwKey to the found values
316 * both (boardid and boardId) are set because
317 * they might be used differently in the
318 * application and in the init scripts (?)
319 * return 0 in case of match, 1 if not match or error
321 int do_checkboardidhwk(cmd_tbl_t *cmdtp, int flag, int argc,
324 unsigned long ivmbid = 0, ivmhwkey = 0;
325 unsigned long envbid = 0, envhwkey = 0;
327 int verbose = argc > 1 && *argv[1] == 'v';
331 * first read out the real inventory values, these values are
332 * already stored in the local hush variables
334 p = get_local_var("IVM_BoardId");
336 printf("can't get the IVM_Boardid\n");
339 rc = strict_strtoul(p, 16, &ivmbid);
341 p = get_local_var("IVM_HWKey");
343 printf("can't get the IVM_HWKey\n");
346 rc = strict_strtoul(p, 16, &ivmhwkey);
348 if (!ivmbid || !ivmhwkey) {
349 printf("Error: IVM_BoardId and/or IVM_HWKey not set!\n");
353 /* now try to read values from environment if available */
354 p = getenv("boardid");
356 rc = strict_strtoul(p, 16, &envbid);
359 rc = strict_strtoul(p, 16, &envhwkey);
362 printf("strict_strtoul returns error: %d", rc);
366 if (!envbid || !envhwkey) {
368 * BoardId/HWkey not available in the environment, so try the
369 * environment variable for BoardId/HWkey list
371 char *bidhwklist = getenv("boardIdListHex");
375 char *rest = bidhwklist;
379 printf("IVM_BoardId: %ld, IVM_HWKey=%ld\n",
381 printf("boardIdHwKeyList: %s\n",
385 /* loop over each bid/hwkey pair in the list */
386 unsigned long bid = 0;
387 unsigned long hwkey = 0;
389 while (*rest && !isxdigit(*rest))
392 * use simple_strtoul because we need &end and
393 * we know we got non numeric char at the end
395 bid = simple_strtoul(rest, &endp, 16);
396 /* BoardId and HWkey are separated with a "_" */
400 * use simple_strtoul because we need
403 hwkey = simple_strtoul(rest, &endp, 16);
405 while (*rest && !isxdigit(*rest))
408 if ((!bid) || (!hwkey)) {
413 printf("trying bid=0x%lX, hwkey=%ld\n",
417 * Compare the values of the found entry in the
418 * list with the valid values which are stored
419 * in the inventory eeprom. If they are equal
420 * set the values in environment variables.
422 if ((bid == ivmbid) && (hwkey == ivmhwkey)) {
428 sprintf(buf, "%lx", bid);
429 setenv("boardid", buf);
430 sprintf(buf, "%lx", hwkey);
431 setenv("hwkey", buf);
433 } /* end while( ! found ) */
437 /* compare now the values */
438 if ((ivmbid == envbid) && (ivmhwkey == envhwkey)) {
439 printf("boardid=0x%3lX, hwkey=%ld\n", envbid, envhwkey);
442 printf("Error: env boardid=0x%3lX, hwkey=%ld\n", envbid,
444 printf(" IVM bId=0x%3lX, hwKey=%ld\n", ivmbid, ivmhwkey);
445 rc = 1; /* don't match */
450 U_BOOT_CMD(km_checkbidhwk, 2, 0, do_checkboardidhwk,
451 "check boardid and hwkey",
452 "[v]\n - check environment parameter "\
453 "\"boardIdListHex\" against stored boardid and hwkey "\
454 "from the IVM\n v: verbose output"