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,
28 #if defined(CONFIG_KM82XX)
38 #include <linux/ctype.h>
40 #if defined(CONFIG_OF_BOARD_SETUP) && defined(CONFIG_OF_LIBFDT)
45 #if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C)
48 static void i2c_write_start_seq(void);
49 DECLARE_GLOBAL_DATA_PTR;
52 * Set Keymile specific environment variables
53 * Currently only some memory layout variables are calculated here
54 * ... ------------------------------------------------
55 * ... |@rootfsaddr |@pnvramaddr |@varaddr |@reserved |@END_OF_RAM
56 * ... |<------------------- pram ------------------->|
57 * ... ------------------------------------------------
58 * @END_OF_RAM: denotes the RAM size
59 * @pnvramaddr: Startadress of pseudo non volatile RAM in hex
60 * @pram : preserved ram size in k
61 * @varaddr : startadress for /var mounted into RAM
66 unsigned int pnvramaddr;
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 pram = (CONFIG_KM_RESERVED_PRAM + CONFIG_KM_PHRAM + CONFIG_KM_PNVRAM) /
77 sprintf((char *)buf, "0x%x", pram);
78 setenv("pram", (char *)buf);
80 varaddr = gd->ram_size - CONFIG_KM_RESERVED_PRAM - CONFIG_KM_PHRAM;
81 sprintf((char *)buf, "0x%x", varaddr);
82 setenv("varaddr", (char *)buf);
86 #if defined(CONFIG_SYS_I2C_INIT_BOARD)
87 #define DELAY_ABORT_SEQ 62 /* @200kHz 9 clocks = 44us, 62us is ok */
88 #define DELAY_HALF_PERIOD (500 / (CONFIG_SYS_I2C_SPEED / 1000))
90 #if defined(CONFIG_KM_82XX)
91 #define SDA_MASK 0x00010000
92 #define SCL_MASK 0x00020000
93 void set_pin(int state, unsigned long mask)
95 ioport_t *iop = ioport_addr((immap_t *)CONFIG_SYS_IMMR, 3);
98 setbits_be32(&iop->pdat, mask);
100 clrbits_be32(&iop->pdat, mask);
102 setbits_be32(&iop->pdir, mask);
105 static int get_pin(unsigned long mask)
107 ioport_t *iop = ioport_addr((immap_t *)CONFIG_SYS_IMMR, 3);
109 clrbits_be32(&iop->pdir, mask);
110 return 0 != (in_be32(&iop->pdat) & mask);
113 static void set_sda(int state)
115 set_pin(state, SDA_MASK);
118 static void set_scl(int state)
120 set_pin(state, SCL_MASK);
123 static int get_sda(void)
125 return get_pin(SDA_MASK);
128 static int get_scl(void)
130 return get_pin(SCL_MASK);
133 #if defined(CONFIG_HARD_I2C)
134 static void setports(int gpio)
136 ioport_t *iop = ioport_addr((immap_t *)CONFIG_SYS_IMMR, 3);
139 clrbits_be32(&iop->ppar, (SDA_MASK | SCL_MASK));
140 clrbits_be32(&iop->podr, (SDA_MASK | SCL_MASK));
142 setbits_be32(&iop->ppar, (SDA_MASK | SCL_MASK));
143 clrbits_be32(&iop->pdir, (SDA_MASK | SCL_MASK));
144 setbits_be32(&iop->podr, (SDA_MASK | SCL_MASK));
150 #if !defined(CONFIG_MPC83xx)
151 static void i2c_write_start_seq(void)
154 udelay(DELAY_HALF_PERIOD);
156 udelay(DELAY_HALF_PERIOD);
158 udelay(DELAY_HALF_PERIOD);
160 udelay(DELAY_HALF_PERIOD);
164 * I2C is a synchronous protocol and resets of the processor in the middle
165 * of an access can block the I2C Bus until a powerdown of the full unit is
166 * done. This function toggles the SCL until the SCL and SCA line are
167 * released, but max. 16 times, after this a I2C start-sequence is sent.
168 * This I2C Deblocking mechanism was developed by Keymile in association
169 * with Anatech and Atmel in 1998.
171 int i2c_make_abort(void)
174 #if defined(CONFIG_HARD_I2C) && !defined(MACH_TYPE_KM_KIRKWOOD)
175 immap_t *immap = (immap_t *)CONFIG_SYS_IMMR ;
176 i2c8260_t *i2c = (i2c8260_t *)&immap->im_i2c;
179 * disable I2C controller first, otherwhise it thinks we want to
180 * talk to the slave port...
182 clrbits_8(&i2c->i2c_i2mod, 0x01);
184 /* Set the PortPins to GPIO */
198 udelay(DELAY_ABORT_SEQ);
200 udelay(DELAY_ABORT_SEQ);
201 scl_state = get_scl();
202 sda_state = get_sda();
203 if (scl_state && sda_state) {
210 for (i = 0; i < 5; i++)
211 i2c_write_start_seq();
213 /* respect stop setup time */
214 udelay(DELAY_ABORT_SEQ);
216 udelay(DELAY_ABORT_SEQ);
220 #if defined(CONFIG_HARD_I2C)
221 /* Set the PortPins back to use for I2C */
228 #if defined(CONFIG_MPC83xx)
229 static void i2c_write_start_seq(void)
232 dev = (struct fsl_i2c *) (CONFIG_SYS_IMMR + CONFIG_SYS_I2C_OFFSET);
233 udelay(DELAY_ABORT_SEQ);
234 out_8(&dev->cr, (I2C_CR_MEN | I2C_CR_MSTA));
235 udelay(DELAY_ABORT_SEQ);
236 out_8(&dev->cr, (I2C_CR_MEN));
239 int i2c_make_abort(void)
242 dev = (struct fsl_i2c *) (CONFIG_SYS_IMMR + CONFIG_SYS_I2C_OFFSET);
249 /* wait after each operation to finsh with a delay */
250 out_8(&dev->cr, (I2C_CR_MSTA));
251 udelay(DELAY_ABORT_SEQ);
252 out_8(&dev->cr, (I2C_CR_MEN | I2C_CR_MSTA));
253 udelay(DELAY_ABORT_SEQ);
254 dummy = in_8(&dev->dr);
255 udelay(DELAY_ABORT_SEQ);
256 last = in_8(&dev->dr);
260 * do read until the last bit is 1, but stop if the full eeprom is
263 while (((last & 0x01) != 0x01) &&
264 (nbr_read < CONFIG_SYS_IVM_EEPROM_MAX_LEN)) {
265 udelay(DELAY_ABORT_SEQ);
266 last = in_8(&dev->dr);
269 if ((last & 0x01) != 0x01)
271 if ((last != 0xff) || (nbr_read > 1))
272 printf("[INFO] i2c abort after %d bytes (0x%02x)\n",
274 udelay(DELAY_ABORT_SEQ);
275 out_8(&dev->cr, (I2C_CR_MEN));
276 udelay(DELAY_ABORT_SEQ);
277 /* clear status reg */
280 for (i = 0; i < 5; i++)
281 i2c_write_start_seq();
283 printf("[ERROR] i2c abort failed after %d bytes (0x%02x)\n",
291 * i2c_init_board - reset i2c bus. When the board is powercycled during a
292 * bus transfer it might hang; for details see doc/I2C_Edge_Conditions.
294 void i2c_init_board(void)
296 /* Now run the AbortSequence() */
302 #if !defined(MACH_TYPE_KM_KIRKWOOD)
303 int ethernet_present(void)
305 struct km_bec_fpga *base =
306 (struct km_bec_fpga *)CONFIG_SYS_KMBEC_FPGA_BASE;
308 return in_8(&base->bprth) & PIGGY_PRESENT;
312 int board_eth_init(bd_t *bis)
314 if (ethernet_present())
315 return cpu_eth_init(bis);
321 * do_setboardid command
322 * read out the board id and the hw key from the intventory EEPROM and set
323 * this values as environment variables.
325 static int do_setboardid(cmd_tbl_t *cmdtp, int flag, int argc,
328 unsigned char buf[32];
331 p = get_local_var("IVM_BoardId");
333 printf("can't get the IVM_Boardid\n");
336 sprintf((char *)buf, "%s", p);
337 setenv("boardid", (char *)buf);
339 p = get_local_var("IVM_HWKey");
341 printf("can't get the IVM_HWKey\n");
344 sprintf((char *)buf, "%s", p);
345 setenv("hwkey", (char *)buf);
350 U_BOOT_CMD(km_setboardid, 1, 0, do_setboardid, "setboardid", "read out bid and "
351 "hwkey from IVM and set in environment");
354 * command km_checkbidhwk
355 * if "boardid" and "hwkey" are not already set in the environment, do:
356 * if a "boardIdListHex" exists in the environment:
357 * - read ivm data for boardid and hwkey
358 * - compare each entry of the boardIdListHex with the
361 * set environment variables boardid, boardId,
362 * hwkey, hwKey to the found values
363 * both (boardid and boardId) are set because
364 * they might be used differently in the
365 * application and in the init scripts (?)
366 * return 0 in case of match, 1 if not match or error
368 int do_checkboardidhwk(cmd_tbl_t *cmdtp, int flag, int argc,
371 unsigned long ivmbid = 0, ivmhwkey = 0;
372 unsigned long envbid = 0, envhwkey = 0;
374 int verbose = argc > 1 && *argv[1] == 'v';
378 * first read out the real inventory values, these values are
379 * already stored in the local hush variables
381 p = get_local_var("IVM_BoardId");
383 printf("can't get the IVM_Boardid\n");
386 rc = strict_strtoul(p, 16, &ivmbid);
388 p = get_local_var("IVM_HWKey");
390 printf("can't get the IVM_HWKey\n");
393 rc = strict_strtoul(p, 16, &ivmhwkey);
395 if (!ivmbid || !ivmhwkey) {
396 printf("Error: IVM_BoardId and/or IVM_HWKey not set!\n");
400 /* now try to read values from environment if available */
401 p = getenv("boardid");
403 rc = strict_strtoul(p, 16, &envbid);
406 rc = strict_strtoul(p, 16, &envhwkey);
409 printf("strict_strtoul returns error: %d", rc);
413 if (!envbid || !envhwkey) {
415 * BoardId/HWkey not available in the environment, so try the
416 * environment variable for BoardId/HWkey list
418 char *bidhwklist = getenv("boardIdListHex");
422 char *rest = bidhwklist;
426 printf("IVM_BoardId: %ld, IVM_HWKey=%ld\n",
428 printf("boardIdHwKeyList: %s\n",
432 /* loop over each bid/hwkey pair in the list */
433 unsigned long bid = 0;
434 unsigned long hwkey = 0;
436 while (*rest && !isxdigit(*rest))
439 * use simple_strtoul because we need &end and
440 * we know we got non numeric char at the end
442 bid = simple_strtoul(rest, &endp, 16);
443 /* BoardId and HWkey are separated with a "_" */
447 * use simple_strtoul because we need
450 hwkey = simple_strtoul(rest, &endp, 16);
452 while (*rest && !isxdigit(*rest))
455 if ((!bid) || (!hwkey)) {
460 printf("trying bid=0x%lX, hwkey=%ld\n",
464 * Compare the values of the found entry in the
465 * list with the valid values which are stored
466 * in the inventory eeprom. If they are equal
467 * set the values in environment variables.
469 if ((bid == ivmbid) && (hwkey == ivmhwkey)) {
475 sprintf(buf, "%lx", bid);
476 setenv("boardid", buf);
477 sprintf(buf, "%lx", hwkey);
478 setenv("hwkey", buf);
480 } /* end while( ! found ) */
484 /* compare now the values */
485 if ((ivmbid == envbid) && (ivmhwkey == envhwkey)) {
486 printf("boardid=0x%3lX, hwkey=%ld\n", envbid, envhwkey);
489 printf("Error: env bId=0x%3lX, hwKey=%ld\n", envbid, envhwkey);
490 printf(" IVM bId=0x%3lX, hwKey=%ld\n", ivmbid, ivmhwkey);
491 rc = 1; /* don't match */
496 U_BOOT_CMD(km_checkbidhwk, 2, 0, do_checkboardidhwk,
497 "check boardid and hwkey",
498 "[v]\n - check environment parameter "\
499 "\"boardIdListHex\" against stored boardid and hwkey "\
500 "from the IVM\n v: verbose output"