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;
68 pnvramaddr = gd->ram_size - CONFIG_KM_RESERVED_PRAM - CONFIG_KM_PHRAM
70 sprintf((char *)buf, "0x%x", pnvramaddr);
71 setenv("pnvramaddr", (char *)buf);
73 pram = (CONFIG_KM_RESERVED_PRAM + CONFIG_KM_PHRAM + CONFIG_KM_PNVRAM) /
75 sprintf((char *)buf, "0x%x", pram);
76 setenv("pram", (char *)buf);
78 varaddr = gd->ram_size - CONFIG_KM_RESERVED_PRAM - CONFIG_KM_PHRAM;
79 sprintf((char *)buf, "0x%x", varaddr);
80 setenv("varaddr", (char *)buf);
84 #define DELAY_ABORT_SEQ 62 /* @200kHz 9 clocks = 44us, 62us is ok */
85 #define DELAY_HALF_PERIOD (500 / (CONFIG_SYS_I2C_SPEED / 1000))
87 #if !defined(CONFIG_MPC83xx)
88 static void i2c_write_start_seq(void)
91 udelay(DELAY_HALF_PERIOD);
93 udelay(DELAY_HALF_PERIOD);
95 udelay(DELAY_HALF_PERIOD);
97 udelay(DELAY_HALF_PERIOD);
101 * I2C is a synchronous protocol and resets of the processor in the middle
102 * of an access can block the I2C Bus until a powerdown of the full unit is
103 * done. This function toggles the SCL until the SCL and SCA line are
104 * released, but max. 16 times, after this a I2C start-sequence is sent.
105 * This I2C Deblocking mechanism was developed by Keymile in association
106 * with Anatech and Atmel in 1998.
108 int i2c_make_abort(void)
111 #if defined(CONFIG_HARD_I2C) && !defined(MACH_TYPE_KM_KIRKWOOD)
112 immap_t *immap = (immap_t *)CONFIG_SYS_IMMR ;
113 i2c8260_t *i2c = (i2c8260_t *)&immap->im_i2c;
116 * disable I2C controller first, otherwhise it thinks we want to
117 * talk to the slave port...
119 clrbits_8(&i2c->i2c_i2mod, 0x01);
121 /* Set the PortPins to GPIO */
135 udelay(DELAY_ABORT_SEQ);
137 udelay(DELAY_ABORT_SEQ);
138 scl_state = get_scl();
139 sda_state = get_sda();
140 if (scl_state && sda_state) {
147 for (i = 0; i < 5; i++)
148 i2c_write_start_seq();
150 /* respect stop setup time */
151 udelay(DELAY_ABORT_SEQ);
153 udelay(DELAY_ABORT_SEQ);
157 #if defined(CONFIG_HARD_I2C)
158 /* Set the PortPins back to use for I2C */
163 #endif /* !MPC83xx */
165 #if defined(CONFIG_MPC83xx)
166 static void i2c_write_start_seq(void)
169 dev = (struct fsl_i2c *) (CONFIG_SYS_IMMR + CONFIG_SYS_I2C_OFFSET);
170 udelay(DELAY_ABORT_SEQ);
171 out_8(&dev->cr, (I2C_CR_MEN | I2C_CR_MSTA));
172 udelay(DELAY_ABORT_SEQ);
173 out_8(&dev->cr, (I2C_CR_MEN));
176 int i2c_make_abort(void)
179 dev = (struct fsl_i2c *) (CONFIG_SYS_IMMR + CONFIG_SYS_I2C_OFFSET);
186 /* wait after each operation to finsh with a delay */
187 out_8(&dev->cr, (I2C_CR_MSTA));
188 udelay(DELAY_ABORT_SEQ);
189 out_8(&dev->cr, (I2C_CR_MEN | I2C_CR_MSTA));
190 udelay(DELAY_ABORT_SEQ);
191 dummy = in_8(&dev->dr);
192 udelay(DELAY_ABORT_SEQ);
193 last = in_8(&dev->dr);
197 * do read until the last bit is 1, but stop if the full eeprom is
200 while (((last & 0x01) != 0x01) &&
201 (nbr_read < CONFIG_SYS_IVM_EEPROM_MAX_LEN)) {
202 udelay(DELAY_ABORT_SEQ);
203 last = in_8(&dev->dr);
206 if ((last & 0x01) != 0x01)
208 if ((last != 0xff) || (nbr_read > 1))
209 printf("[INFO] i2c abort after %d bytes (0x%02x)\n",
211 udelay(DELAY_ABORT_SEQ);
212 out_8(&dev->cr, (I2C_CR_MEN));
213 udelay(DELAY_ABORT_SEQ);
214 /* clear status reg */
217 for (i = 0; i < 5; i++)
218 i2c_write_start_seq();
220 printf("[ERROR] i2c abort failed after %d bytes (0x%02x)\n",
228 * i2c_init_board - reset i2c bus. When the board is powercycled during a
229 * bus transfer it might hang; for details see doc/I2C_Edge_Conditions.
231 void i2c_init_board(void)
233 /* Now run the AbortSequence() */
237 #if !defined(MACH_TYPE_KM_KIRKWOOD)
238 int ethernet_present(void)
240 struct km_bec_fpga *base =
241 (struct km_bec_fpga *)CONFIG_SYS_KMBEC_FPGA_BASE;
243 return in_8(&base->bprth) & PIGGY_PRESENT;
247 int board_eth_init(bd_t *bis)
249 if (ethernet_present())
250 return cpu_eth_init(bis);
256 * do_setboardid command
257 * read out the board id and the hw key from the intventory EEPROM and set
258 * this values as environment variables.
260 static int do_setboardid(cmd_tbl_t *cmdtp, int flag, int argc,
263 unsigned char buf[32];
266 p = get_local_var("IVM_BoardId");
268 printf("can't get the IVM_Boardid\n");
271 sprintf((char *)buf, "%s", p);
272 setenv("boardid", (char *)buf);
273 printf("set boardid=%s\n", buf);
275 p = get_local_var("IVM_HWKey");
277 printf("can't get the IVM_HWKey\n");
280 sprintf((char *)buf, "%s", p);
281 setenv("hwkey", (char *)buf);
282 printf("set hwkey=%s\n", buf);
283 printf("Execute manually saveenv for persistent storage.\n");
288 U_BOOT_CMD(km_setboardid, 1, 0, do_setboardid, "setboardid", "read out bid and "
289 "hwkey from IVM and set in environment");
292 * command km_checkbidhwk
293 * if "boardid" and "hwkey" are not already set in the environment, do:
294 * if a "boardIdListHex" exists in the environment:
295 * - read ivm data for boardid and hwkey
296 * - compare each entry of the boardIdListHex with the
299 * set environment variables boardid, boardId,
300 * hwkey, hwKey to the found values
301 * both (boardid and boardId) are set because
302 * they might be used differently in the
303 * application and in the init scripts (?)
304 * return 0 in case of match, 1 if not match or error
306 int do_checkboardidhwk(cmd_tbl_t *cmdtp, int flag, int argc,
309 unsigned long ivmbid = 0, ivmhwkey = 0;
310 unsigned long envbid = 0, envhwkey = 0;
312 int verbose = argc > 1 && *argv[1] == 'v';
316 * first read out the real inventory values, these values are
317 * already stored in the local hush variables
319 p = get_local_var("IVM_BoardId");
321 printf("can't get the IVM_Boardid\n");
324 rc = strict_strtoul(p, 16, &ivmbid);
326 p = get_local_var("IVM_HWKey");
328 printf("can't get the IVM_HWKey\n");
331 rc = strict_strtoul(p, 16, &ivmhwkey);
333 if (!ivmbid || !ivmhwkey) {
334 printf("Error: IVM_BoardId and/or IVM_HWKey not set!\n");
338 /* now try to read values from environment if available */
339 p = getenv("boardid");
341 rc = strict_strtoul(p, 16, &envbid);
344 rc = strict_strtoul(p, 16, &envhwkey);
347 printf("strict_strtoul returns error: %d", rc);
351 if (!envbid || !envhwkey) {
353 * BoardId/HWkey not available in the environment, so try the
354 * environment variable for BoardId/HWkey list
356 char *bidhwklist = getenv("boardIdListHex");
360 char *rest = bidhwklist;
364 printf("IVM_BoardId: %ld, IVM_HWKey=%ld\n",
366 printf("boardIdHwKeyList: %s\n",
370 /* loop over each bid/hwkey pair in the list */
371 unsigned long bid = 0;
372 unsigned long hwkey = 0;
374 while (*rest && !isxdigit(*rest))
377 * use simple_strtoul because we need &end and
378 * we know we got non numeric char at the end
380 bid = simple_strtoul(rest, &endp, 16);
381 /* BoardId and HWkey are separated with a "_" */
385 * use simple_strtoul because we need
388 hwkey = simple_strtoul(rest, &endp, 16);
390 while (*rest && !isxdigit(*rest))
393 if ((!bid) || (!hwkey)) {
398 printf("trying bid=0x%lX, hwkey=%ld\n",
402 * Compare the values of the found entry in the
403 * list with the valid values which are stored
404 * in the inventory eeprom. If they are equal
405 * set the values in environment variables.
407 if ((bid == ivmbid) && (hwkey == ivmhwkey)) {
413 sprintf(buf, "%lx", bid);
414 setenv("boardid", buf);
415 sprintf(buf, "%lx", hwkey);
416 setenv("hwkey", buf);
418 } /* end while( ! found ) */
422 /* compare now the values */
423 if ((ivmbid == envbid) && (ivmhwkey == envhwkey)) {
424 printf("boardid=0x%3lX, hwkey=%ld\n", envbid, envhwkey);
427 printf("Error: env boardid=0x%3lX, hwkey=%ld\n", envbid,
429 printf(" IVM bId=0x%3lX, hwKey=%ld\n", ivmbid, ivmhwkey);
430 rc = 1; /* don't match */
435 U_BOOT_CMD(km_checkbidhwk, 2, 0, do_checkboardidhwk,
436 "check boardid and hwkey",
437 "[v]\n - check environment parameter "\
438 "\"boardIdListHex\" against stored boardid and hwkey "\
439 "from the IVM\n v: verbose output"