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>
38 #if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C)
42 #if !defined(CONFIG_MPC83xx)
43 static void i2c_write_start_seq(void);
46 DECLARE_GLOBAL_DATA_PTR;
49 * Set Keymile specific environment variables
50 * Currently only some memory layout variables are calculated here
51 * ... ------------------------------------------------
52 * ... |@rootfsaddr |@pnvramaddr |@varaddr |@reserved |@END_OF_RAM
53 * ... |<------------------- pram ------------------->|
54 * ... ------------------------------------------------
55 * @END_OF_RAM: denotes the RAM size
56 * @pnvramaddr: Startadress of pseudo non volatile RAM in hex
57 * @pram : preserved ram size in k
58 * @varaddr : startadress for /var mounted into RAM
63 unsigned int pnvramaddr;
66 unsigned int kernelmem;
68 unsigned long rootfssize = 0;
70 pnvramaddr = gd->ram_size - CONFIG_KM_RESERVED_PRAM - CONFIG_KM_PHRAM
72 sprintf((char *)buf, "0x%x", pnvramaddr);
73 setenv("pnvramaddr", (char *)buf);
75 /* try to read rootfssize (ram image) from envrionment */
76 p = getenv("rootfssize");
78 strict_strtoul(p, 16, &rootfssize);
79 pram = (rootfssize + CONFIG_KM_RESERVED_PRAM + CONFIG_KM_PHRAM +
80 CONFIG_KM_PNVRAM) / 0x400;
81 sprintf((char *)buf, "0x%x", pram);
82 setenv("pram", (char *)buf);
84 varaddr = gd->ram_size - CONFIG_KM_RESERVED_PRAM - CONFIG_KM_PHRAM;
85 sprintf((char *)buf, "0x%x", varaddr);
86 setenv("varaddr", (char *)buf);
88 kernelmem = gd->ram_size - 0x400 * pram;
89 sprintf((char *)buf, "0x%x", kernelmem);
90 setenv("kernelmem", (char *)buf);
95 #if defined(CONFIG_SYS_I2C_INIT_BOARD)
96 #if !defined(CONFIG_MPC83xx)
97 static void i2c_write_start_seq(void)
100 udelay(DELAY_HALF_PERIOD);
102 udelay(DELAY_HALF_PERIOD);
104 udelay(DELAY_HALF_PERIOD);
106 udelay(DELAY_HALF_PERIOD);
110 * I2C is a synchronous protocol and resets of the processor in the middle
111 * of an access can block the I2C Bus until a powerdown of the full unit is
112 * done. This function toggles the SCL until the SCL and SCA line are
113 * released, but max. 16 times, after this a I2C start-sequence is sent.
114 * This I2C Deblocking mechanism was developed by Keymile in association
115 * with Anatech and Atmel in 1998.
117 int i2c_make_abort(void)
120 #if defined(CONFIG_HARD_I2C) && !defined(MACH_TYPE_KM_KIRKWOOD)
121 immap_t *immap = (immap_t *)CONFIG_SYS_IMMR ;
122 i2c8260_t *i2c = (i2c8260_t *)&immap->im_i2c;
125 * disable I2C controller first, otherwhise it thinks we want to
126 * talk to the slave port...
128 clrbits_8(&i2c->i2c_i2mod, 0x01);
130 /* Set the PortPins to GPIO */
144 udelay(DELAY_ABORT_SEQ);
146 udelay(DELAY_ABORT_SEQ);
147 scl_state = get_scl();
148 sda_state = get_sda();
149 if (scl_state && sda_state) {
151 printf("[INFO] i2c abort after %d clocks\n", i);
157 for (i = 0; i < 5; i++)
158 i2c_write_start_seq();
160 printf("[ERROR] i2c abort failed\n");
162 /* respect stop setup time */
163 udelay(DELAY_ABORT_SEQ);
165 udelay(DELAY_ABORT_SEQ);
169 #if defined(CONFIG_HARD_I2C)
170 /* Set the PortPins back to use for I2C */
178 * i2c_init_board - reset i2c bus. When the board is powercycled during a
179 * bus transfer it might hang; for details see doc/I2C_Edge_Conditions.
181 void i2c_init_board(void)
183 /* Now run the AbortSequence() */
189 #if !defined(MACH_TYPE_KM_KIRKWOOD)
190 int ethernet_present(void)
192 struct km_bec_fpga *base =
193 (struct km_bec_fpga *)CONFIG_SYS_KMBEC_FPGA_BASE;
195 return in_8(&base->bprth) & PIGGY_PRESENT;
199 int board_eth_init(bd_t *bis)
201 if (ethernet_present())
202 return cpu_eth_init(bis);
208 * do_setboardid command
209 * read out the board id and the hw key from the intventory EEPROM and set
210 * this values as environment variables.
212 static int do_setboardid(cmd_tbl_t *cmdtp, int flag, int argc,
215 unsigned char buf[32];
218 p = get_local_var("IVM_BoardId");
220 printf("can't get the IVM_Boardid\n");
223 sprintf((char *)buf, "%s", p);
224 setenv("boardid", (char *)buf);
225 printf("set boardid=%s\n", buf);
227 p = get_local_var("IVM_HWKey");
229 printf("can't get the IVM_HWKey\n");
232 sprintf((char *)buf, "%s", p);
233 setenv("hwkey", (char *)buf);
234 printf("set hwkey=%s\n", buf);
235 printf("Execute manually saveenv for persistent storage.\n");
240 U_BOOT_CMD(km_setboardid, 1, 0, do_setboardid, "setboardid", "read out bid and "
241 "hwkey from IVM and set in environment");
244 * command km_checkbidhwk
245 * if "boardid" and "hwkey" are not already set in the environment, do:
246 * if a "boardIdListHex" exists in the environment:
247 * - read ivm data for boardid and hwkey
248 * - compare each entry of the boardIdListHex with the
251 * set environment variables boardid, boardId,
252 * hwkey, hwKey to the found values
253 * both (boardid and boardId) are set because
254 * they might be used differently in the
255 * application and in the init scripts (?)
256 * return 0 in case of match, 1 if not match or error
258 int do_checkboardidhwk(cmd_tbl_t *cmdtp, int flag, int argc,
261 unsigned long ivmbid = 0, ivmhwkey = 0;
262 unsigned long envbid = 0, envhwkey = 0;
264 int verbose = argc > 1 && *argv[1] == 'v';
268 * first read out the real inventory values, these values are
269 * already stored in the local hush variables
271 p = get_local_var("IVM_BoardId");
273 printf("can't get the IVM_Boardid\n");
276 rc = strict_strtoul(p, 16, &ivmbid);
278 p = get_local_var("IVM_HWKey");
280 printf("can't get the IVM_HWKey\n");
283 rc = strict_strtoul(p, 16, &ivmhwkey);
285 if (!ivmbid || !ivmhwkey) {
286 printf("Error: IVM_BoardId and/or IVM_HWKey not set!\n");
290 /* now try to read values from environment if available */
291 p = getenv("boardid");
293 rc = strict_strtoul(p, 16, &envbid);
296 rc = strict_strtoul(p, 16, &envhwkey);
299 printf("strict_strtoul returns error: %d", rc);
303 if (!envbid || !envhwkey) {
305 * BoardId/HWkey not available in the environment, so try the
306 * environment variable for BoardId/HWkey list
308 char *bidhwklist = getenv("boardIdListHex");
312 char *rest = bidhwklist;
316 printf("IVM_BoardId: %ld, IVM_HWKey=%ld\n",
318 printf("boardIdHwKeyList: %s\n",
322 /* loop over each bid/hwkey pair in the list */
323 unsigned long bid = 0;
324 unsigned long hwkey = 0;
326 while (*rest && !isxdigit(*rest))
329 * use simple_strtoul because we need &end and
330 * we know we got non numeric char at the end
332 bid = simple_strtoul(rest, &endp, 16);
333 /* BoardId and HWkey are separated with a "_" */
337 * use simple_strtoul because we need
340 hwkey = simple_strtoul(rest, &endp, 16);
342 while (*rest && !isxdigit(*rest))
345 if ((!bid) || (!hwkey)) {
350 printf("trying bid=0x%lX, hwkey=%ld\n",
354 * Compare the values of the found entry in the
355 * list with the valid values which are stored
356 * in the inventory eeprom. If they are equal
357 * set the values in environment variables.
359 if ((bid == ivmbid) && (hwkey == ivmhwkey)) {
365 sprintf(buf, "%lx", bid);
366 setenv("boardid", buf);
367 sprintf(buf, "%lx", hwkey);
368 setenv("hwkey", buf);
370 } /* end while( ! found ) */
374 /* compare now the values */
375 if ((ivmbid == envbid) && (ivmhwkey == envhwkey)) {
376 printf("boardid=0x%3lX, hwkey=%ld\n", envbid, envhwkey);
379 printf("Error: env boardid=0x%3lX, hwkey=%ld\n", envbid,
381 printf(" IVM bId=0x%3lX, hwKey=%ld\n", ivmbid, ivmhwkey);
382 rc = 1; /* don't match */
387 U_BOOT_CMD(km_checkbidhwk, 2, 0, do_checkboardidhwk,
388 "check boardid and hwkey",
389 "[v]\n - check environment parameter "\
390 "\"boardIdListHex\" against stored boardid and hwkey "\
391 "from the IVM\n v: verbose output"