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wdenke2211742002-11-02 23:30:20 +00001/***********************************************************************
2 *
3M* Modul: lwmon.c
4M*
5M* Content: LWMON specific U-Boot commands.
6 *
7 * (C) Copyright 2001, 2002
8 * DENX Software Engineering
9 * Wolfgang Denk, wd@denx.de
10 * All rights reserved.
11 *
12D* Design: wd@denx.de
13C* Coding: wd@denx.de
14V* Verification: dzu@denx.de
15 *
16 * See file CREDITS for list of people who contributed to this
17 * project.
18 *
19 * This program is free software; you can redistribute it and/or
20 * modify it under the terms of the GNU General Public License as
21 * published by the Free Software Foundation; either version 2 of
22 * the License, or (at your option) any later version.
23 *
24 * This program is distributed in the hope that it will be useful,
25 * but WITHOUT ANY WARRANTY; without even the implied warranty of
26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
27 * GNU General Public License for more details.
28 *
29 * You should have received a copy of the GNU General Public License
30 * along with this program; if not, write to the Free Software
31 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
32 * MA 02111-1307 USA
33 ***********************************************************************/
34
35/*---------------------------- Headerfiles ----------------------------*/
36#include <common.h>
37#include <mpc8xx.h>
38#include <commproc.h>
39#include <i2c.h>
40#include <command.h>
wdenke2211742002-11-02 23:30:20 +000041#include <malloc.h>
42#include <post.h>
43
44#include <linux/types.h>
45#include <linux/string.h> /* for strdup */
46
47/*------------------------ Local prototypes ---------------------------*/
48static long int dram_size (long int, long int *, long int);
wdenk4532cb62003-04-27 22:52:51 +000049static void kbd_init (void);
50static int compare_magic (uchar *kbd_data, uchar *str);
wdenke2211742002-11-02 23:30:20 +000051
52
53/*--------------------- Local macros and constants --------------------*/
54#define _NOT_USED_ 0xFFFFFFFF
55
wdenk4532cb62003-04-27 22:52:51 +000056#ifdef CONFIG_MODEM_SUPPORT
57static int key_pressed(void);
58extern void disable_putc(void);
59#endif /* CONFIG_MODEM_SUPPORT */
60
wdenke2211742002-11-02 23:30:20 +000061/*
62 * 66 MHz SDRAM access using UPM A
63 */
64const uint sdram_table[] =
65{
66#if defined(CFG_MEMORY_75) || defined(CFG_MEMORY_8E)
67 /*
68 * Single Read. (Offset 0 in UPM RAM)
69 */
70 0x1F0DFC04, 0xEEAFBC04, 0x11AF7C04, 0xEFBAFC00,
71 0x1FF5FC47, /* last */
72 /*
73 * SDRAM Initialization (offset 5 in UPM RAM)
74 *
wdenk8bde7f72003-06-27 21:31:46 +000075 * This is no UPM entry point. The following definition uses
76 * the remaining space to establish an initialization
77 * sequence, which is executed by a RUN command.
wdenke2211742002-11-02 23:30:20 +000078 *
79 */
80 0x1FF5FC34, 0xEFEABC34, 0x1FB57C35, /* last */
81 /*
82 * Burst Read. (Offset 8 in UPM RAM)
83 */
84 0x1F0DFC04, 0xEEAFBC04, 0x10AF7C04, 0xF0AFFC00,
85 0xF0AFFC00, 0xF1AFFC00, 0xEFBAFC00, 0x1FF5FC47, /* last */
86 _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
87 _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
88 /*
89 * Single Write. (Offset 18 in UPM RAM)
90 */
91 0x1F2DFC04, 0xEEABBC00, 0x01B27C04, 0x1FF5FC47, /* last */
92 _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
93 /*
94 * Burst Write. (Offset 20 in UPM RAM)
95 */
96 0x1F0DFC04, 0xEEABBC00, 0x10A77C00, 0xF0AFFC00,
97 0xF0AFFC00, 0xE1BAFC04, 0x01FF5FC47, /* last */
98 _NOT_USED_,
99 _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
100 _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
101 /*
102 * Refresh (Offset 30 in UPM RAM)
103 */
104 0x1FFD7C84, 0xFFFFFC04, 0xFFFFFC04, 0xFFFFFC04,
105 0xFFFFFC84, 0xFFFFFC07, /* last */
106 _NOT_USED_, _NOT_USED_,
107 _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
108 /*
109 * Exception. (Offset 3c in UPM RAM)
110 */
111 0x7FFFFC07, /* last */
112 0xFFFFFCFF, 0xFFFFFCFF, 0xFFFFFCFF,
113#endif
114#ifdef CFG_MEMORY_7E
115 /*
116 * Single Read. (Offset 0 in UPM RAM)
117 */
118 0x0E2DBC04, 0x11AF7C04, 0xEFBAFC00, 0x1FF5FC47, /* last */
119 _NOT_USED_,
120 /*
121 * SDRAM Initialization (offset 5 in UPM RAM)
122 *
wdenk8bde7f72003-06-27 21:31:46 +0000123 * This is no UPM entry point. The following definition uses
124 * the remaining space to establish an initialization
125 * sequence, which is executed by a RUN command.
wdenke2211742002-11-02 23:30:20 +0000126 *
127 */
128 0x1FF5FC34, 0xEFEABC34, 0x1FB57C35, /* last */
129 /*
130 * Burst Read. (Offset 8 in UPM RAM)
131 */
132 0x0E2DBC04, 0x10AF7C04, 0xF0AFFC00, 0xF0AFFC00,
133 0xF1AFFC00, 0xEFBAFC00, 0x1FF5FC47, /* last */
wdenk8bde7f72003-06-27 21:31:46 +0000134 _NOT_USED_,
wdenke2211742002-11-02 23:30:20 +0000135 _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
136 _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
137 /*
138 * Single Write. (Offset 18 in UPM RAM)
139 */
140 0x0E29BC04, 0x01B27C04, 0x1FF5FC47, /* last */
141 _NOT_USED_,
142 _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
143 /*
144 * Burst Write. (Offset 20 in UPM RAM)
145 */
146 0x0E29BC04, 0x10A77C00, 0xF0AFFC00, 0xF0AFFC00,
147 0xE1BAFC04, 0x1FF5FC47, /* last */
wdenk8bde7f72003-06-27 21:31:46 +0000148 _NOT_USED_, _NOT_USED_,
wdenke2211742002-11-02 23:30:20 +0000149 _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
150 _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
151 /*
152 * Refresh (Offset 30 in UPM RAM)
153 */
154 0x1FFD7C84, 0xFFFFFC04, 0xFFFFFC04, 0xFFFFFC04,
155 0xFFFFFC84, 0xFFFFFC07, /* last */
156 _NOT_USED_, _NOT_USED_,
157 _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
158 /*
159 * Exception. (Offset 3c in UPM RAM)
160 */
161 0x7FFFFC07, /* last */
162 0xFFFFFCFF, 0xFFFFFCFF, 0xFFFFFCFF,
163#endif
164};
165
166/*
167 * Check Board Identity:
168 *
169 */
170
171/***********************************************************************
172F* Function: int checkboard (void) P*A*Z*
173 *
174P* Parameters: none
175P*
176P* Returnvalue: int - 0 is always returned
177 *
178Z* Intention: This function is the checkboard() method implementation
179Z* for the lwmon board. Only a standard message is printed.
180 *
181D* Design: wd@denx.de
182C* Coding: wd@denx.de
183V* Verification: dzu@denx.de
184 ***********************************************************************/
185int checkboard (void)
186{
187 puts ("Board: Litronic Monitor IV\n");
188 return (0);
189}
190
191/***********************************************************************
192F* Function: long int initdram (int board_type) P*A*Z*
193 *
194P* Parameters: int board_type
195P* - Usually type of the board - ignored here.
196P*
197P* Returnvalue: long int
198P* - Size of initialized memory
199 *
200Z* Intention: This function is the initdram() method implementation
201Z* for the lwmon board.
202Z* The memory controller is initialized to access the
203Z* DRAM.
204 *
205D* Design: wd@denx.de
206C* Coding: wd@denx.de
207V* Verification: dzu@denx.de
208 ***********************************************************************/
209long int initdram (int board_type)
210{
211 volatile immap_t *immr = (immap_t *) CFG_IMMR;
212 volatile memctl8xx_t *memctl = &immr->im_memctl;
213 long int size_b0;
214 long int size8, size9;
215 int i;
216
217 /*
218 * Configure UPMA for SDRAM
219 */
220 upmconfig (UPMA, (uint *)sdram_table, sizeof(sdram_table)/sizeof(uint));
221
222 memctl->memc_mptpr = CFG_MPTPR;
223
224 /* burst length=4, burst type=sequential, CAS latency=2 */
225 memctl->memc_mar = CFG_MAR;
226
227 /*
228 * Map controller bank 3 to the SDRAM bank at preliminary address.
229 */
230 memctl->memc_or3 = CFG_OR3_PRELIM;
231 memctl->memc_br3 = CFG_BR3_PRELIM;
232
233 /* initialize memory address register */
234 memctl->memc_mamr = CFG_MAMR_8COL; /* refresh not enabled yet */
235
236 /* mode initialization (offset 5) */
237 udelay (200); /* 0x80006105 */
238 memctl->memc_mcr = MCR_OP_RUN | MCR_MB_CS3 | MCR_MLCF (1) | MCR_MAD (0x05);
239
240 /* run 2 refresh sequence with 4-beat refresh burst (offset 0x30) */
241 udelay (1); /* 0x80006130 */
242 memctl->memc_mcr = MCR_OP_RUN | MCR_MB_CS3 | MCR_MLCF (1) | MCR_MAD (0x30);
243 udelay (1); /* 0x80006130 */
244 memctl->memc_mcr = MCR_OP_RUN | MCR_MB_CS3 | MCR_MLCF (1) | MCR_MAD (0x30);
245
246 udelay (1); /* 0x80006106 */
247 memctl->memc_mcr = MCR_OP_RUN | MCR_MB_CS3 | MCR_MLCF (1) | MCR_MAD (0x06);
248
249 memctl->memc_mamr |= MAMR_PTBE; /* refresh enabled */
250
251 udelay (200);
252
253 /* Need at least 10 DRAM accesses to stabilize */
254 for (i = 0; i < 10; ++i) {
255 volatile unsigned long *addr =
256 (volatile unsigned long *) SDRAM_BASE3_PRELIM;
257 unsigned long val;
258
259 val = *(addr + i);
260 *(addr + i) = val;
261 }
262
263 /*
264 * Check Bank 0 Memory Size for re-configuration
265 *
266 * try 8 column mode
267 */
268 size8 = dram_size (CFG_MAMR_8COL, (ulong *)SDRAM_BASE3_PRELIM, SDRAM_MAX_SIZE);
269
270 udelay (1000);
271
272 /*
273 * try 9 column mode
274 */
275 size9 = dram_size (CFG_MAMR_9COL, (ulong *)SDRAM_BASE3_PRELIM, SDRAM_MAX_SIZE);
276
277 if (size8 < size9) { /* leave configuration at 9 columns */
278 size_b0 = size9;
279 memctl->memc_mamr = CFG_MAMR_9COL | MAMR_PTBE;
280 udelay (500);
281 } else { /* back to 8 columns */
282 size_b0 = size8;
283 memctl->memc_mamr = CFG_MAMR_8COL | MAMR_PTBE;
284 udelay (500);
285 }
286
287 /*
288 * Final mapping:
289 */
290
291 memctl->memc_or3 = ((-size_b0) & 0xFFFF0000) |
292 OR_CSNT_SAM | OR_G5LS | SDRAM_TIMING;
293 memctl->memc_br3 = (CFG_SDRAM_BASE & BR_BA_MSK) | BR_MS_UPMA | BR_V;
294 udelay (1000);
295
296 return (size_b0);
297}
298
299/***********************************************************************
300F* Function: static long int dram_size (long int mamr_value,
301F* long int *base,
302F* long int maxsize) P*A*Z*
303 *
304P* Parameters: long int mamr_value
305P* - Value for MAMR for the test
306P* long int *base
307P* - Base address for the test
308P* long int maxsize
309P* - Maximum size to test for
310P*
311P* Returnvalue: long int
312P* - Size of probed memory
313 *
314Z* Intention: Check memory range for valid RAM. A simple memory test
315Z* determines the actually available RAM size between
316Z* addresses `base' and `base + maxsize'. Some (not all)
317Z* hardware errors are detected:
318Z* - short between address lines
319Z* - short between data lines
320 *
321D* Design: wd@denx.de
322C* Coding: wd@denx.de
323V* Verification: dzu@denx.de
324 ***********************************************************************/
325static long int dram_size (long int mamr_value, long int *base, long int maxsize)
326{
327 volatile immap_t *immr = (immap_t *) CFG_IMMR;
328 volatile memctl8xx_t *memctl = &immr->im_memctl;
329 volatile long int *addr;
330 ulong cnt, val;
331 ulong save[32]; /* to make test non-destructive */
332 unsigned char i = 0;
333
334 memctl->memc_mamr = mamr_value;
335
336 for (cnt = maxsize / sizeof (long); cnt > 0; cnt >>= 1) {
337 addr = base + cnt; /* pointer arith! */
338
339 save[i++] = *addr;
340 *addr = ~cnt;
341 }
342
343 /* write 0 to base address */
344 addr = base;
345 save[i] = *addr;
346 *addr = 0;
347
348 /* check at base address */
349 if ((val = *addr) != 0) {
350 *addr = save[i];
351 return (0);
352 }
353
354 for (cnt = 1; cnt <= maxsize / sizeof (long); cnt <<= 1) {
355 addr = base + cnt; /* pointer arith! */
356
357 val = *addr;
358 *addr = save[--i];
359
360 if (val != (~cnt)) {
361 return (cnt * sizeof (long));
362 }
363 }
364 return (maxsize);
365}
366
367/* ------------------------------------------------------------------------- */
368
369#ifndef PB_ENET_TENA
370# define PB_ENET_TENA ((uint)0x00002000) /* PB 18 */
371#endif
372
373/***********************************************************************
374F* Function: int board_pre_init (void) P*A*Z*
375 *
376P* Parameters: none
377P*
378P* Returnvalue: int
379P* - 0 is always returned.
380 *
381Z* Intention: This function is the board_pre_init() method implementation
382Z* for the lwmon board.
383Z* Disable Ethernet TENA on Port B.
384 *
385D* Design: wd@denx.de
386C* Coding: wd@denx.de
387V* Verification: dzu@denx.de
388 ***********************************************************************/
389int board_pre_init (void)
390{
391 volatile immap_t *immr = (immap_t *) CFG_IMMR;
392
393 /* Disable Ethernet TENA on Port B
394 * Necessary because of pull up in COM3 port.
395 *
396 * This is just a preliminary fix, intended to turn off TENA
397 * as soon as possible to avoid noise on the network. Once
398 * I²C is running we will make sure the interface is
399 * correctly initialized.
400 */
401 immr->im_cpm.cp_pbpar &= ~PB_ENET_TENA;
402 immr->im_cpm.cp_pbodr &= ~PB_ENET_TENA;
403 immr->im_cpm.cp_pbdat &= ~PB_ENET_TENA; /* set to 0 = disabled */
404 immr->im_cpm.cp_pbdir |= PB_ENET_TENA;
wdenk4532cb62003-04-27 22:52:51 +0000405
wdenke2211742002-11-02 23:30:20 +0000406 return (0);
407}
408
409/* ------------------------------------------------------------------------- */
410
411/***********************************************************************
412F* Function: void reset_phy (void) P*A*Z*
413 *
414P* Parameters: none
415P*
416P* Returnvalue: none
417 *
418Z* Intention: Reset the PHY. In the lwmon case we do this by the
419Z* signaling the PIC I/O expander.
420 *
421D* Design: wd@denx.de
422C* Coding: wd@denx.de
423V* Verification: dzu@denx.de
424 ***********************************************************************/
425void reset_phy (void)
426{
427 uchar c;
428
429#ifdef DEBUG
430 printf ("### Switch on Ethernet for SCC2 ###\n");
431#endif
432 c = pic_read (0x61);
433#ifdef DEBUG
434 printf ("Old PIC read: reg_61 = 0x%02x\n", c);
435#endif
436 c |= 0x40; /* disable COM3 */
437 c &= ~0x80; /* enable Ethernet */
438 pic_write (0x61, c);
439#ifdef DEBUG
440 c = pic_read (0x61);
441 printf ("New PIC read: reg_61 = 0x%02x\n", c);
442#endif
443 udelay (1000);
444}
445
446
447/*------------------------- Keyboard controller -----------------------*/
448/* command codes */
449#define KEYBD_CMD_READ_KEYS 0x01
450#define KEYBD_CMD_READ_VERSION 0x02
451#define KEYBD_CMD_READ_STATUS 0x03
452#define KEYBD_CMD_RESET_ERRORS 0x10
453
454/* status codes */
455#define KEYBD_STATUS_MASK 0x3F
456#define KEYBD_STATUS_H_RESET 0x20
457#define KEYBD_STATUS_BROWNOUT 0x10
458#define KEYBD_STATUS_WD_RESET 0x08
459#define KEYBD_STATUS_OVERLOAD 0x04
460#define KEYBD_STATUS_ILLEGAL_WR 0x02
461#define KEYBD_STATUS_ILLEGAL_RD 0x01
462
463/* Number of bytes returned from Keyboard Controller */
464#define KEYBD_VERSIONLEN 2 /* version information */
465#define KEYBD_DATALEN 9 /* normal key scan data */
466
467/* maximum number of "magic" key codes that can be assigned */
468
469static uchar kbd_addr = CFG_I2C_KEYBD_ADDR;
470
471static uchar *key_match (uchar *);
472
473#define KEYBD_SET_DEBUGMODE '#' /* Magic key to enable debug output */
474
475/***********************************************************************
wdenk4532cb62003-04-27 22:52:51 +0000476F* Function: int board_postclk_init (void) P*A*Z*
wdenke2211742002-11-02 23:30:20 +0000477 *
478P* Parameters: none
479P*
480P* Returnvalue: int
wdenk4532cb62003-04-27 22:52:51 +0000481P* - 0 is always returned.
wdenke2211742002-11-02 23:30:20 +0000482 *
wdenk4532cb62003-04-27 22:52:51 +0000483Z* Intention: This function is the board_postclk_init() method implementation
wdenke2211742002-11-02 23:30:20 +0000484Z* for the lwmon board.
wdenke2211742002-11-02 23:30:20 +0000485 *
wdenke2211742002-11-02 23:30:20 +0000486 ***********************************************************************/
wdenk4532cb62003-04-27 22:52:51 +0000487int board_postclk_init (void)
wdenke2211742002-11-02 23:30:20 +0000488{
wdenk4532cb62003-04-27 22:52:51 +0000489 DECLARE_GLOBAL_DATA_PTR;
490
491 kbd_init();
492
493#ifdef CONFIG_MODEM_SUPPORT
494 if (key_pressed()) {
495 disable_putc(); /* modem doesn't understand banner etc */
496 gd->do_mdm_init = 1;
497 }
498#endif
499
500 return (0);
501}
502
503static void kbd_init (void)
504{
505 DECLARE_GLOBAL_DATA_PTR;
506
wdenke2211742002-11-02 23:30:20 +0000507 uchar kbd_data[KEYBD_DATALEN];
508 uchar tmp_data[KEYBD_DATALEN];
wdenke2211742002-11-02 23:30:20 +0000509 uchar val, errcd;
wdenke2211742002-11-02 23:30:20 +0000510 int i;
511
512 i2c_init (CFG_I2C_SPEED, CFG_I2C_SLAVE);
wdenk8bde7f72003-06-27 21:31:46 +0000513
wdenk4532cb62003-04-27 22:52:51 +0000514 gd->kbd_status = 0;
wdenke2211742002-11-02 23:30:20 +0000515
wdenkd1cbe852003-06-28 17:24:46 +0000516 /* Forced by PIC. Delays <= 175us loose */
517 udelay(1000);
518
wdenke2211742002-11-02 23:30:20 +0000519 /* Read initial keyboard error code */
520 val = KEYBD_CMD_READ_STATUS;
521 i2c_write (kbd_addr, 0, 0, &val, 1);
522 i2c_read (kbd_addr, 0, 0, &errcd, 1);
523 /* clear unused bits */
524 errcd &= KEYBD_STATUS_MASK;
525 /* clear "irrelevant" bits. Recommended by Martin Rajek, LWN */
526 errcd &= ~(KEYBD_STATUS_H_RESET|KEYBD_STATUS_BROWNOUT);
527 if (errcd) {
wdenk4532cb62003-04-27 22:52:51 +0000528 gd->kbd_status |= errcd << 8;
wdenke2211742002-11-02 23:30:20 +0000529 }
530 /* Reset error code and verify */
531 val = KEYBD_CMD_RESET_ERRORS;
532 i2c_write (kbd_addr, 0, 0, &val, 1);
533 udelay(1000); /* delay NEEDED by keyboard PIC !!! */
534
535 val = KEYBD_CMD_READ_STATUS;
536 i2c_write (kbd_addr, 0, 0, &val, 1);
537 i2c_read (kbd_addr, 0, 0, &val, 1);
538
539 val &= KEYBD_STATUS_MASK; /* clear unused bits */
540 if (val) { /* permanent error, report it */
wdenk4532cb62003-04-27 22:52:51 +0000541 gd->kbd_status |= val;
542 return;
wdenke2211742002-11-02 23:30:20 +0000543 }
544
545 /*
wdenke2211742002-11-02 23:30:20 +0000546 * Read current keyboard state.
547 *
wdenk8bde7f72003-06-27 21:31:46 +0000548 * After the error reset it may take some time before the
549 * keyboard PIC picks up a valid keyboard scan - the total
550 * scan time is approx. 1.6 ms (information by Martin Rajek,
551 * 28 Sep 2002). We read a couple of times for the keyboard
552 * to stabilize, using a big enough delay.
553 * 10 times should be enough. If the data is still changing,
554 * we use what we get :-(
wdenke2211742002-11-02 23:30:20 +0000555 */
556
557 memset (tmp_data, 0xFF, KEYBD_DATALEN); /* impossible value */
558 for (i=0; i<10; ++i) {
559 val = KEYBD_CMD_READ_KEYS;
560 i2c_write (kbd_addr, 0, 0, &val, 1);
561 i2c_read (kbd_addr, 0, 0, kbd_data, KEYBD_DATALEN);
562
563 if (memcmp(kbd_data, tmp_data, KEYBD_DATALEN) == 0) {
564 /* consistent state, done */
565 break;
566 }
567 /* remeber last state, delay, and retry */
568 memcpy (tmp_data, kbd_data, KEYBD_DATALEN);
569 udelay (5000);
570 }
wdenk4532cb62003-04-27 22:52:51 +0000571}
572
573/***********************************************************************
574F* Function: int misc_init_r (void) P*A*Z*
575 *
576P* Parameters: none
577P*
578P* Returnvalue: int
579P* - 0 is always returned, even in the case of a keyboard
580P* error.
581 *
582Z* Intention: This function is the misc_init_r() method implementation
583Z* for the lwmon board.
584Z* The keyboard controller is initialized and the result
585Z* of a read copied to the environment variable "keybd".
586Z* If KEYBD_SET_DEBUGMODE is defined, a check is made for
587Z* this key, and if found display to the LCD will be enabled.
588Z* The keys in "keybd" are checked against the magic
589Z* keycommands defined in the environment.
590Z* See also key_match().
591 *
592D* Design: wd@denx.de
593C* Coding: wd@denx.de
594V* Verification: dzu@denx.de
595 ***********************************************************************/
596int misc_init_r (void)
597{
598 DECLARE_GLOBAL_DATA_PTR;
599
600 uchar kbd_data[KEYBD_DATALEN];
601 uchar keybd_env[2 * KEYBD_DATALEN + 1];
602 uchar kbd_init_status = gd->kbd_status >> 8;
603 uchar kbd_status = gd->kbd_status;
604 uchar val;
605 uchar *str;
606 int i;
607
608 if (kbd_init_status) {
609 printf ("KEYBD: Error %02X\n", kbd_init_status);
610 }
611 if (kbd_status) { /* permanent error, report it */
612 printf ("*** Keyboard error code %02X ***\n", kbd_status);
613 sprintf (keybd_env, "%02X", kbd_status);
614 setenv ("keybd", keybd_env);
615 return 0;
616 }
617
618 /*
619 * Now we know that we have a working keyboard, so disable
620 * all output to the LCD except when a key press is detected.
621 */
622
623 if ((console_assign (stdout, "serial") < 0) ||
624 (console_assign (stderr, "serial") < 0)) {
625 printf ("Can't assign serial port as output device\n");
626 }
627
628 /* Read Version */
629 val = KEYBD_CMD_READ_VERSION;
630 i2c_write (kbd_addr, 0, 0, &val, 1);
631 i2c_read (kbd_addr, 0, 0, kbd_data, KEYBD_VERSIONLEN);
632 printf ("KEYBD: Version %d.%d\n", kbd_data[0], kbd_data[1]);
633
634 /* Read current keyboard state */
635 val = KEYBD_CMD_READ_KEYS;
636 i2c_write (kbd_addr, 0, 0, &val, 1);
637 i2c_read (kbd_addr, 0, 0, kbd_data, KEYBD_DATALEN);
wdenke2211742002-11-02 23:30:20 +0000638
639 for (i = 0; i < KEYBD_DATALEN; ++i) {
640 sprintf (keybd_env + i + i, "%02X", kbd_data[i]);
641 }
642 setenv ("keybd", keybd_env);
643
644 str = strdup (key_match (kbd_data)); /* decode keys */
645#ifdef KEYBD_SET_DEBUGMODE
646 if (kbd_data[0] == KEYBD_SET_DEBUGMODE) { /* set debug mode */
647 if ((console_assign (stdout, "lcd") < 0) ||
648 (console_assign (stderr, "lcd") < 0)) {
649 printf ("Can't assign LCD display as output device\n");
650 }
651 }
652#endif /* KEYBD_SET_DEBUGMODE */
653#ifdef CONFIG_PREBOOT /* automatically configure "preboot" command on key match */
654 setenv ("preboot", str); /* set or delete definition */
655#endif /* CONFIG_PREBOOT */
656 if (str != NULL) {
657 free (str);
658 }
659 return (0);
660}
661
662#ifdef CONFIG_PREBOOT
663
664static uchar kbd_magic_prefix[] = "key_magic";
665static uchar kbd_command_prefix[] = "key_cmd";
666
wdenk4532cb62003-04-27 22:52:51 +0000667static int compare_magic (uchar *kbd_data, uchar *str)
668{
669 uchar compare[KEYBD_DATALEN-1];
670 uchar *nxt;
671 int i;
672
673 /* Don't include modifier byte */
674 memcpy (compare, kbd_data+1, KEYBD_DATALEN-1);
675
676 for (; str != NULL; str = (*nxt) ? nxt+1 : nxt) {
677 uchar c;
678 int k;
679
680 c = (uchar) simple_strtoul (str, (char **) (&nxt), 16);
681
682 if (str == nxt) { /* invalid character */
683 break;
684 }
685
686 /*
687 * Check if this key matches the input.
688 * Set matches to zero, so they match only once
689 * and we can find duplicates or extra keys
690 */
691 for (k = 0; k < sizeof(compare); ++k) {
692 if (compare[k] == '\0') /* only non-zero entries */
693 continue;
694 if (c == compare[k]) { /* found matching key */
695 compare[k] = '\0';
696 break;
697 }
698 }
699 if (k == sizeof(compare)) {
700 return -1; /* unmatched key */
701 }
702 }
703
704 /*
705 * A full match leaves no keys in the `compare' array,
706 */
707 for (i = 0; i < sizeof(compare); ++i) {
708 if (compare[i])
709 {
710 return -1;
711 }
712 }
713
714 return 0;
715}
716
wdenke2211742002-11-02 23:30:20 +0000717/***********************************************************************
718F* Function: static uchar *key_match (uchar *kbd_data) P*A*Z*
719 *
720P* Parameters: uchar *kbd_data
721P* - The keys to match against our magic definitions
722P*
723P* Returnvalue: uchar *
724P* - != NULL: Pointer to the corresponding command(s)
725P* NULL: No magic is about to happen
726 *
727Z* Intention: Check if pressed key(s) match magic sequence,
728Z* and return the command string associated with that key(s).
729Z*
730Z* If no key press was decoded, NULL is returned.
731Z*
732Z* Note: the first character of the argument will be
733Z* overwritten with the "magic charcter code" of the
734Z* decoded key(s), or '\0'.
735Z*
736Z* Note: the string points to static environment data
737Z* and must be saved before you call any function that
738Z* modifies the environment.
739 *
740D* Design: wd@denx.de
741C* Coding: wd@denx.de
742V* Verification: dzu@denx.de
743 ***********************************************************************/
744static uchar *key_match (uchar *kbd_data)
745{
wdenke2211742002-11-02 23:30:20 +0000746 uchar magic[sizeof (kbd_magic_prefix) + 1];
wdenk4532cb62003-04-27 22:52:51 +0000747 uchar *suffix;
wdenke2211742002-11-02 23:30:20 +0000748 uchar *kbd_magic_keys;
wdenke2211742002-11-02 23:30:20 +0000749
750 /*
751 * The following string defines the characters that can pe appended
752 * to "key_magic" to form the names of environment variables that
753 * hold "magic" key codes, i. e. such key codes that can cause
754 * pre-boot actions. If the string is empty (""), then only
755 * "key_magic" is checked (old behaviour); the string "125" causes
756 * checks for "key_magic1", "key_magic2" and "key_magic5", etc.
757 */
758 if ((kbd_magic_keys = getenv ("magic_keys")) == NULL)
759 kbd_magic_keys = "";
760
761 /* loop over all magic keys;
762 * use '\0' suffix in case of empty string
763 */
764 for (suffix=kbd_magic_keys; *suffix || suffix==kbd_magic_keys; ++suffix) {
765 sprintf (magic, "%s%c", kbd_magic_prefix, *suffix);
766#if 0
767 printf ("### Check magic \"%s\"\n", magic);
768#endif
wdenk4532cb62003-04-27 22:52:51 +0000769 if (compare_magic(kbd_data, getenv(magic)) == 0) {
wdenke2211742002-11-02 23:30:20 +0000770 uchar cmd_name[sizeof (kbd_command_prefix) + 1];
771 char *cmd;
772
773 sprintf (cmd_name, "%s%c", kbd_command_prefix, *suffix);
774
775 cmd = getenv (cmd_name);
776#if 0
777 printf ("### Set PREBOOT to $(%s): \"%s\"\n",
778 cmd_name, cmd ? cmd : "<<NULL>>");
779#endif
780 *kbd_data = *suffix;
781 return (cmd);
782 }
783 }
784#if 0
785 printf ("### Delete PREBOOT\n");
786#endif
787 *kbd_data = '\0';
788 return (NULL);
789}
790#endif /* CONFIG_PREBOOT */
791
792/*---------------Board Special Commands: PIC read/write ---------------*/
793
794#if (CONFIG_COMMANDS & CFG_CMD_BSP)
795/***********************************************************************
796F* Function: int do_pic (cmd_tbl_t *cmdtp, int flag,
797F* int argc, char *argv[]) P*A*Z*
798 *
799P* Parameters: cmd_tbl_t *cmdtp
800P* - Pointer to our command table entry
801P* int flag
802P* - If the CMD_FLAG_REPEAT bit is set, then this call is
803P* a repetition
804P* int argc
805P* - Argument count
806P* char *argv[]
807P* - Array of the actual arguments
808P*
809P* Returnvalue: int
810P* - 0 The command was handled successfully
811P* 1 An error occurred
812 *
813Z* Intention: Implement the "pic [read|write]" commands.
814Z* The read subcommand takes one argument, the register,
815Z* whereas the write command takes two, the register and
816Z* the new value.
817 *
818D* Design: wd@denx.de
819C* Coding: wd@denx.de
820V* Verification: dzu@denx.de
821 ***********************************************************************/
822int do_pic (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
823{
824 uchar reg, val;
825
826 switch (argc) {
827 case 3: /* PIC read reg */
828 if (strcmp (argv[1], "read") != 0)
829 break;
830
831 reg = simple_strtoul (argv[2], NULL, 16);
832
833 printf ("PIC read: reg %02x: %02x\n\n", reg, pic_read (reg));
834
835 return 0;
836 case 4: /* PIC write reg val */
837 if (strcmp (argv[1], "write") != 0)
838 break;
839
840 reg = simple_strtoul (argv[2], NULL, 16);
841 val = simple_strtoul (argv[3], NULL, 16);
842
843 printf ("PIC write: reg %02x val 0x%02x: %02x => ",
844 reg, val, pic_read (reg));
845 pic_write (reg, val);
846 printf ("%02x\n\n", pic_read (reg));
847 return 0;
848 default:
849 break;
850 }
851 printf ("Usage:\n%s\n", cmdtp->usage);
852 return 1;
853}
wdenk8bde7f72003-06-27 21:31:46 +0000854cmd_tbl_t U_BOOT_CMD(pic) = MK_CMD_ENTRY(
855 "pic", 4, 1, do_pic,
856 "pic - read and write PIC registers\n",
857 "read reg - read PIC register `reg'\n"
858 "pic write reg val - write value `val' to PIC register `reg'\n"
859);
wdenke2211742002-11-02 23:30:20 +0000860
861/***********************************************************************
862F* Function: int do_kbd (cmd_tbl_t *cmdtp, int flag,
863F* int argc, char *argv[]) P*A*Z*
864 *
865P* Parameters: cmd_tbl_t *cmdtp
866P* - Pointer to our command table entry
867P* int flag
868P* - If the CMD_FLAG_REPEAT bit is set, then this call is
869P* a repetition
870P* int argc
871P* - Argument count
872P* char *argv[]
873P* - Array of the actual arguments
874P*
875P* Returnvalue: int
876P* - 0 is always returned.
877 *
878Z* Intention: Implement the "kbd" command.
879Z* The keyboard status is read. The result is printed on
880Z* the console and written into the "keybd" environment
881Z* variable.
882 *
883D* Design: wd@denx.de
884C* Coding: wd@denx.de
885V* Verification: dzu@denx.de
886 ***********************************************************************/
887int do_kbd (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
888{
889 uchar kbd_data[KEYBD_DATALEN];
890 uchar keybd_env[2 * KEYBD_DATALEN + 1];
891 uchar val;
892 int i;
893
wdenk4532cb62003-04-27 22:52:51 +0000894#if 0 /* Done in kbd_init */
wdenke2211742002-11-02 23:30:20 +0000895 i2c_init (CFG_I2C_SPEED, CFG_I2C_SLAVE);
wdenk4532cb62003-04-27 22:52:51 +0000896#endif
wdenke2211742002-11-02 23:30:20 +0000897
898 /* Read keys */
899 val = KEYBD_CMD_READ_KEYS;
900 i2c_write (kbd_addr, 0, 0, &val, 1);
901 i2c_read (kbd_addr, 0, 0, kbd_data, KEYBD_DATALEN);
902
903 puts ("Keys:");
904 for (i = 0; i < KEYBD_DATALEN; ++i) {
905 sprintf (keybd_env + i + i, "%02X", kbd_data[i]);
906 printf (" %02x", kbd_data[i]);
907 }
908 putc ('\n');
909 setenv ("keybd", keybd_env);
910 return 0;
911}
912
wdenk8bde7f72003-06-27 21:31:46 +0000913cmd_tbl_t U_BOOT_CMD(kdb) = MK_CMD_ENTRY(
914 "kbd", 1, 1, do_kbd,
915 "kbd - read keyboard status\n",
916 NULL
917);
918
wdenke2211742002-11-02 23:30:20 +0000919/* Read and set LSB switch */
wdenkd0fb80c2003-01-11 09:48:40 +0000920#define CFG_PC_TXD1_ENA 0x0008 /* PC.12 */
wdenke2211742002-11-02 23:30:20 +0000921
922/***********************************************************************
923F* Function: int do_lsb (cmd_tbl_t *cmdtp, int flag,
924F* int argc, char *argv[]) P*A*Z*
925 *
926P* Parameters: cmd_tbl_t *cmdtp
927P* - Pointer to our command table entry
928P* int flag
929P* - If the CMD_FLAG_REPEAT bit is set, then this call is
930P* a repetition
931P* int argc
932P* - Argument count
933P* char *argv[]
934P* - Array of the actual arguments
935P*
936P* Returnvalue: int
937P* - 0 The command was handled successfully
938P* 1 An error occurred
939 *
940Z* Intention: Implement the "lsb [on|off]" commands.
941Z* The lsb is switched according to the first parameter by
942Z* by signaling the PIC I/O expander.
943Z* Called with no arguments, the current setting is
944Z* printed.
945 *
946D* Design: wd@denx.de
947C* Coding: wd@denx.de
948V* Verification: dzu@denx.de
949 ***********************************************************************/
950int do_lsb (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
951{
952 uchar val;
953 immap_t *immr = (immap_t *) CFG_IMMR;
954
955 switch (argc) {
956 case 1: /* lsb - print setting */
957 val = pic_read (0x60);
958 printf ("LSB is o%s\n", (val & 0x20) ? "n" : "ff");
959 return 0;
960 case 2: /* lsb on or lsb off - set switch */
961 val = pic_read (0x60);
962
963 if (strcmp (argv[1], "on") == 0) {
964 val |= 0x20;
965 immr->im_ioport.iop_pcpar &= ~(CFG_PC_TXD1_ENA);
966 immr->im_ioport.iop_pcdat |= CFG_PC_TXD1_ENA;
967 immr->im_ioport.iop_pcdir |= CFG_PC_TXD1_ENA;
968 } else if (strcmp (argv[1], "off") == 0) {
969 val &= ~0x20;
970 immr->im_ioport.iop_pcpar &= ~(CFG_PC_TXD1_ENA);
971 immr->im_ioport.iop_pcdat &= ~(CFG_PC_TXD1_ENA);
972 immr->im_ioport.iop_pcdir |= CFG_PC_TXD1_ENA;
973 } else {
974 break;
975 }
976 pic_write (0x60, val);
977 return 0;
978 default:
979 break;
980 }
981 printf ("Usage:\n%s\n", cmdtp->usage);
982 return 1;
983}
984
wdenk8bde7f72003-06-27 21:31:46 +0000985cmd_tbl_t U_BOOT_CMD(lsb) = MK_CMD_ENTRY(
986 "lsb", 2, 1, do_lsb,
987 "lsb - check and set LSB switch\n",
988 "on - switch LSB on\n"
989 "lsb off - switch LSB off\n"
990 "lsb - print current setting\n"
991);
992
wdenke2211742002-11-02 23:30:20 +0000993#endif /* CFG_CMD_BSP */
994
995/*----------------------------- Utilities -----------------------------*/
996/***********************************************************************
997F* Function: uchar pic_read (uchar reg) P*A*Z*
998 *
999P* Parameters: uchar reg
1000P* - Register to read
1001P*
1002P* Returnvalue: uchar
1003P* - Value read from register
1004 *
1005Z* Intention: Read a register from the PIC I/O expander.
1006 *
1007D* Design: wd@denx.de
1008C* Coding: wd@denx.de
1009V* Verification: dzu@denx.de
1010 ***********************************************************************/
1011uchar pic_read (uchar reg)
1012{
1013 return (i2c_reg_read (CFG_I2C_PICIO_ADDR, reg));
1014}
1015
1016/***********************************************************************
1017F* Function: void pic_write (uchar reg, uchar val) P*A*Z*
1018 *
1019P* Parameters: uchar reg
1020P* - Register to read
1021P* uchar val
1022P* - Value to write
1023P*
1024P* Returnvalue: none
1025 *
1026Z* Intention: Write to a register on the PIC I/O expander.
1027 *
1028D* Design: wd@denx.de
1029C* Coding: wd@denx.de
1030V* Verification: dzu@denx.de
1031 ***********************************************************************/
1032void pic_write (uchar reg, uchar val)
1033{
1034 i2c_reg_write (CFG_I2C_PICIO_ADDR, reg, val);
1035}
1036
1037/*---------------------- Board Control Functions ----------------------*/
1038/***********************************************************************
1039F* Function: void board_poweroff (void) P*A*Z*
1040 *
1041P* Parameters: none
1042P*
1043P* Returnvalue: none
1044 *
1045Z* Intention: Turn off the battery power and loop endless, so this
1046Z* should better be the last function you call...
1047 *
1048D* Design: wd@denx.de
1049C* Coding: wd@denx.de
1050V* Verification: dzu@denx.de
1051 ***********************************************************************/
1052void board_poweroff (void)
1053{
1054 /* Turn battery off */
1055 ((volatile immap_t *)CFG_IMMR)->im_ioport.iop_pcdat &= ~(1 << (31 - 13));
1056
1057 while (1);
1058}
wdenk4532cb62003-04-27 22:52:51 +00001059
1060#ifdef CONFIG_MODEM_SUPPORT
1061static int key_pressed(void)
1062{
1063 uchar kbd_data[KEYBD_DATALEN];
1064 uchar val;
1065
1066 /* Read keys */
1067 val = KEYBD_CMD_READ_KEYS;
1068 i2c_write (kbd_addr, 0, 0, &val, 1);
1069 i2c_read (kbd_addr, 0, 0, kbd_data, KEYBD_DATALEN);
1070
1071 return (compare_magic(kbd_data, CONFIG_MODEM_KEY_MAGIC) == 0);
1072}
1073#endif /* CONFIG_MODEM_SUPPORT */