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1 /*
2  * (C) Copyright 2008, 2009 Andreas Pfefferle,
3  *     DENX Software Engineering, ap@denx.de.
4  * (C) Copyright 2009 Detlev Zundel,
5  *     DENX Software Engineering, dzu@denx.de.
6  *
7  * See file CREDITS for list of people who contributed to this
8  * project.
9  *
10  * This program is free software; you can redistribute it and/or
11  * modify it under the terms of the GNU General Public License as
12  * published by the Free Software Foundation; either version 2 of
13  * the License, or (at your option) any later version.
14  *
15  * This program is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18  * GNU General Public License for more details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with this program; if not, write to the Free Software
22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
23  * MA 02111-1307 USA
24  */
25
26 #include <asm/io.h>
27 #include <common.h>
28 #include <config.h>
29 #include <mpc5xxx.h>
30 #include <pci.h>
31
32 #include <command.h>
33
34 /* This is needed for the includes in ns16550.h */
35 #define CONFIG_SYS_NS16550_REG_SIZE 1
36 #include <ns16550.h>
37
38 #define GPIO_BASE               ((u_char *)CONFIG_SYS_CS3_START)
39
40 #define DIGIN_TOUCHSCR_MASK     0x00003000      /* Inputs 12-13 */
41 #define DIGIN_KEYB_MASK         0x00010000      /* Input 16 */
42
43 #define DIGIN_DRAWER_SW1        0x00400000      /* Input 22 */
44 #define DIGIN_DRAWER_SW2        0x00800000      /* Input 23 */
45
46 #define DIGIO_LED0              0x00000001      /* Output 0 */
47 #define DIGIO_LED1              0x00000002      /* Output 1 */
48 #define DIGIO_LED2              0x00000004      /* Output 2 */
49 #define DIGIO_LED3              0x00000008      /* Output 3 */
50 #define DIGIO_LED4              0x00000010      /* Output 4 */
51 #define DIGIO_LED5              0x00000020      /* Output 5 */
52
53 #define DIGIO_DRAWER1           0x00000100      /* Output 8 */
54 #define DIGIO_DRAWER2           0x00000200      /* Output 9 */
55
56 #define SERIAL_PORT_BASE        ((u_char *)CONFIG_SYS_CS2_START)
57
58 #define PSC_OP1_RTS     0x01
59 #define PSC_OP0_RTS     0x01
60
61 /*
62  * Table with supported baudrates (defined in inka4x0.h)
63  */
64 static const unsigned long baudrate_table[] = CONFIG_SYS_BAUDRATE_TABLE;
65 #define N_BAUDRATES (sizeof(baudrate_table) / sizeof(baudrate_table[0]))
66
67 static unsigned int inka_digin_get_input(void)
68 {
69         return in_8(GPIO_BASE + 0) << 0 | in_8(GPIO_BASE + 1) << 8 |
70                 in_8(GPIO_BASE + 2) << 16 | in_8(GPIO_BASE + 3) << 24;
71 }
72
73 #define LED_HIGH(NUM)                                                   \
74         do {                                                            \
75                 setbits_be32((unsigned *)MPC5XXX_GPT##NUM##_ENABLE, 0x10); \
76         } while (0)
77
78 #define LED_LOW(NUM)                                                    \
79         do {                                                            \
80                 clrbits_be32((unsigned *)MPC5XXX_GPT##NUM##_ENABLE, 0x10); \
81         } while (0)
82
83 #define CHECK_LED(NUM) \
84     do { \
85             if (state & (1 << NUM)) {           \
86                     LED_HIGH(NUM);              \
87             } else {                            \
88                     LED_LOW(NUM);               \
89             }                                   \
90     } while (0)
91
92 static void inka_digio_set_output(unsigned int state, int which)
93 {
94         volatile struct mpc5xxx_gpio *gpio = (struct mpc5xxx_gpio *)MPC5XXX_GPIO;
95
96         if (which == 0) {
97                 /* other */
98                 CHECK_LED(0);
99                 CHECK_LED(1);
100                 CHECK_LED(2);
101                 CHECK_LED(3);
102                 CHECK_LED(4);
103                 CHECK_LED(5);
104         } else {
105                 if (which == 1) {
106                         /* drawer1 */
107                         if (state) {
108                                 clrbits_be32(&gpio->simple_dvo, 0x1000);
109                                 udelay(1);
110                                 setbits_be32(&gpio->simple_dvo, 0x1000);
111                         } else {
112                                 setbits_be32(&gpio->simple_dvo, 0x1000);
113                                 udelay(1);
114                                 clrbits_be32(&gpio->simple_dvo, 0x1000);
115                         }
116                 }
117                 if (which == 2) {
118                         /* drawer 2 */
119                         if (state) {
120                                 clrbits_be32(&gpio->simple_dvo, 0x2000);
121                                 udelay(1);
122                                 setbits_be32(&gpio->simple_dvo, 0x2000);
123                         } else {
124                                 setbits_be32(&gpio->simple_dvo, 0x2000);
125                                 udelay(1);
126                                 clrbits_be32(&gpio->simple_dvo, 0x2000);
127                         }
128                 }
129         }
130         udelay(1);
131 }
132
133 static int do_inkadiag_io(cmd_tbl_t *cmdtp, int flag, int argc,
134                           char *argv[]) {
135         unsigned int state, val;
136
137         switch (argc) {
138         case 3:
139                 /* Write a value */
140                 val = simple_strtol(argv[2], NULL, 16);
141
142                 if (strcmp(argv[1], "drawer1") == 0) {
143                         inka_digio_set_output(val, 1);
144                 } else if (strcmp(argv[1], "drawer2") == 0) {
145                         inka_digio_set_output(val, 2);
146                 } else if (strcmp(argv[1], "other") == 0)
147                         inka_digio_set_output(val, 0);
148                 else {
149                         printf("Invalid argument: %s\n", argv[1]);
150                         return -1;
151                 }
152                 /* fall through */
153         case 2:
154                 /* Read a value */
155                 state = inka_digin_get_input();
156
157                 if (strcmp(argv[1], "drawer1") == 0) {
158                         val = (state & DIGIN_DRAWER_SW1) >> (ffs(DIGIN_DRAWER_SW1) - 1);
159                 } else if (strcmp(argv[1], "drawer2") == 0) {
160                         val = (state & DIGIN_DRAWER_SW2) >> (ffs(DIGIN_DRAWER_SW2) - 1);
161                 } else if (strcmp(argv[1], "other") == 0) {
162                         val = ((state & DIGIN_KEYB_MASK) >> (ffs(DIGIN_KEYB_MASK) - 1))
163                                 | (state & DIGIN_TOUCHSCR_MASK) >> (ffs(DIGIN_TOUCHSCR_MASK) - 2);
164                 } else {
165                         printf("Invalid argument: %s\n", argv[1]);
166                         return -1;
167                 }
168                 printf("exit code: 0x%X\n", val);
169                 return 0;
170         default:
171                 cmd_usage(cmdtp);
172                 break;
173         }
174
175         return -1;
176 }
177
178 DECLARE_GLOBAL_DATA_PTR;
179
180 static int ser_init(volatile struct mpc5xxx_psc *psc, int baudrate)
181 {
182         unsigned long baseclk;
183         int div;
184
185         /* reset PSC */
186         out_8(&psc->command, PSC_SEL_MODE_REG_1);
187
188         /* select clock sources */
189
190         out_be16(&psc->psc_clock_select, 0);
191         baseclk = (gd->ipb_clk + 16) / 32;
192
193         /* switch to UART mode */
194         out_be32(&psc->sicr, 0);
195
196         /* configure parity, bit length and so on */
197
198         out_8(&psc->mode, PSC_MODE_8_BITS | PSC_MODE_PARNONE);
199         out_8(&psc->mode, PSC_MODE_ONE_STOP);
200
201         /* set up UART divisor */
202         div = (baseclk + (baudrate / 2)) / baudrate;
203         out_8(&psc->ctur, (div >> 8) & 0xff);
204         out_8(&psc->ctlr, div & 0xff);
205
206         /* disable all interrupts */
207         out_be16(&psc->psc_imr, 0);
208
209         /* reset and enable Rx/Tx */
210         out_8(&psc->command, PSC_RST_RX);
211         out_8(&psc->command, PSC_RST_TX);
212         out_8(&psc->command, PSC_RX_ENABLE | PSC_TX_ENABLE);
213
214         return 0;
215 }
216
217 static void ser_putc(volatile struct mpc5xxx_psc *psc, const char c)
218 {
219         /* Wait 1 second for last character to go. */
220         int i = 0;
221
222         while (!(psc->psc_status & PSC_SR_TXEMP) && (i++ < 1000000/10))
223                 udelay(10);
224         psc->psc_buffer_8 = c;
225
226 }
227
228 static int ser_getc(volatile struct mpc5xxx_psc *psc)
229 {
230         /* Wait for a character to arrive. */
231         int i = 0;
232
233         while (!(in_be16(&psc->psc_status) & PSC_SR_RXRDY) && (i++ < 1000000/10))
234                 udelay(10);
235
236         return in_8(&psc->psc_buffer_8);
237 }
238
239 static int do_inkadiag_serial(cmd_tbl_t *cmdtp, int flag, int argc,
240                               char *argv[]) {
241         volatile struct NS16550 *uart;
242         volatile struct mpc5xxx_psc *psc;
243         unsigned int num, mode;
244         int combrd, baudrate, i, j, len;
245         int address;
246
247         if (argc < 5) {
248                 cmd_usage(cmdtp);
249                 return 1;
250         }
251
252         argc--;
253         argv++;
254
255         num = simple_strtol(argv[0], NULL, 0);
256         if (num < 0 || num > 11) {
257                 printf("invalid argument for num: %d\n", num);
258                 return -1;
259         }
260
261         mode = simple_strtol(argv[1], NULL, 0);
262
263         combrd = 0;
264         baudrate = simple_strtoul(argv[2], NULL, 10);
265         for (i=0; i<N_BAUDRATES; ++i) {
266                 if (baudrate == baudrate_table[i])
267                         break;
268         }
269         if (i == N_BAUDRATES) {
270                 printf("## Baudrate %d bps not supported\n",
271                        baudrate);
272                 return 1;
273         }
274         combrd = 115200 / baudrate;
275
276         uart = (struct NS16550 *)(SERIAL_PORT_BASE + (num << 3));
277
278         printf("Testing uart %d.\n\n", num);
279
280         if ((num >= 0) && (num <= 7)) {
281                 if (mode & 1) {
282                         /* turn on 'loopback' mode */
283                         out_8(&uart->mcr, UART_MCR_LOOP);
284                 } else {
285                         /*
286                          * establish the UART's operational parameters
287                          * set DLAB=1, so rbr accesses DLL
288                          */
289                         out_8(&uart->lcr, UART_LCR_DLAB);
290                         /* set baudrate */
291                         out_8(&uart->rbr, combrd);
292                         /* set data-format: 8-N-1 */
293                         out_8(&uart->lcr, UART_LCR_WLS_8);
294                 }
295
296                 if (mode & 2) {
297                         /* set request to send */
298                         out_8(&uart->mcr, UART_MCR_RTS);
299                         udelay(10);
300                         /* check clear to send */
301                         if ((in_8(&uart->msr) & UART_MSR_CTS) == 0x00)
302                                 return -1;
303                 }
304                 if (mode & 4) {
305                         /* set data terminal ready */
306                         out_8(&uart->mcr, UART_MCR_DTR);
307                         udelay(10);
308                         /* check data set ready and carrier detect */
309                         if ((in_8(&uart->msr) & (UART_MSR_DSR | UART_MSR_DCD))
310                             != (UART_MSR_DSR | UART_MSR_DCD))
311                                 return -1;
312                 }
313
314                 /* write each message-character, read it back, and display it */
315                 for (i = 0, len = strlen(argv[3]); i < len; ++i) {
316                         j = 0;
317                         while ((in_8(&uart->lsr) & UART_LSR_THRE) ==    0x00) {
318                                 if (j++ > CONFIG_SYS_HZ)
319                                         break;
320                                 udelay(10);
321                         }
322                         out_8(&uart->rbr, argv[3][i]);
323                         j = 0;
324                         while ((in_8(&uart->lsr) & UART_LSR_DR) == 0x00) {
325                                 if (j++ > CONFIG_SYS_HZ)
326                                         break;
327                                 udelay(10);
328                         }
329                         printf("%c", in_8(&uart->rbr));
330                 }
331                 printf("\n\n");
332                 out_8(&uart->mcr, 0x00);
333         } else {
334                 address = 0;
335
336                 switch (num) {
337                 case 8:
338                         address = MPC5XXX_PSC6;
339                         break;
340                 case 9:
341                         address = MPC5XXX_PSC3;
342                         break;
343                 case 10:
344                         address = MPC5XXX_PSC2;
345                         break;
346                 case 11:
347                         address = MPC5XXX_PSC1;
348                         break;
349                 }
350                 psc = (struct mpc5xxx_psc *)address;
351                 ser_init(psc, simple_strtol(argv[2], NULL, 0));
352                 if (mode & 2) {
353                         /* set request to send */
354                         out_8(&psc->op0, PSC_OP0_RTS);
355                         udelay(10);
356                         /* check clear to send */
357                         if ((in_8(&psc->ip) & PSC_IPCR_CTS) == 0)
358                                 return -1;
359                 }
360                 len = strlen(argv[3]);
361                 for (i = 0; i < len; ++i) {
362                         ser_putc(psc, argv[3][i]);
363                         printf("%c", ser_getc(psc));
364                 }
365                 printf("\n\n");
366         }
367         return 0;
368 }
369
370 #define BUZZER_GPT      (MPC5XXX_GPT + 0x60)    /* GPT6 */
371 static void buzzer_turn_on(unsigned int freq)
372 {
373         volatile struct mpc5xxx_gpt *gpt = (struct mpc5xxx_gpt *)(BUZZER_GPT);
374
375         const u32 prescale = gd->ipb_clk / freq / 128;
376         const u32 count = 128;
377         const u32 width = 64;
378
379         gpt->cir = (prescale << 16) | count;
380         gpt->pwmcr = width << 16;
381         gpt->emsr = 3;          /* Timer enabled for PWM */
382 }
383
384 static void buzzer_turn_off(void)
385 {
386         volatile struct mpc5xxx_gpt *gpt = (struct mpc5xxx_gpt *)(BUZZER_GPT);
387
388         gpt->emsr = 0;
389 }
390
391 static int do_inkadiag_buzzer(cmd_tbl_t *cmdtp, int flag, int argc,
392                               char *argv[]) {
393
394         unsigned int period, freq;
395         int prev, i;
396
397         if (argc != 3) {
398                 cmd_usage(cmdtp);
399                 return 1;
400         }
401
402         argc--;
403         argv++;
404
405         period = simple_strtol(argv[0], NULL, 0);
406         if (!period)
407                 printf("Zero period is senseless\n");
408         argc--;
409         argv++;
410
411         freq = simple_strtol(argv[0], NULL, 0);
412         /* avoid zero prescale in buzzer_turn_on() */
413         if (freq > gd->ipb_clk / 128) {
414                 printf("%dHz exceeds maximum (%ldHz)\n", freq,
415                        gd->ipb_clk / 128);
416         } else if (!freq)
417                 printf("Zero frequency is senseless\n");
418         else
419                 buzzer_turn_on(freq);
420
421         clear_ctrlc();
422         prev = disable_ctrlc(0);
423
424         printf("Buzzing for %d ms. Type ^C to abort!\n\n", period);
425
426         i = 0;
427         while (!ctrlc() && (i++ < CONFIG_SYS_HZ))
428                 udelay(period);
429
430         clear_ctrlc();
431         disable_ctrlc(prev);
432
433         buzzer_turn_off();
434
435         return 0;
436 }
437
438 static int do_inkadiag_help(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
439
440 cmd_tbl_t cmd_inkadiag_sub[] = {
441         U_BOOT_CMD_MKENT(io, 1, 1, do_inkadiag_io, "read digital input",
442          "<drawer1|drawer2|other> [value] - get or set specified signal"),
443         U_BOOT_CMD_MKENT(serial, 4, 1, do_inkadiag_serial, "test serial port",
444          "<num> <mode> <baudrate> <msg>  - test uart num [0..11] in mode\n"
445          "and baudrate with msg"),
446         U_BOOT_CMD_MKENT(buzzer, 2, 1, do_inkadiag_buzzer, "activate buzzer",
447          "<period> <freq> - turn buzzer on for period ms with freq hz"),
448         U_BOOT_CMD_MKENT(help, 4, 1, do_inkadiag_help, "get help",
449          "[command] - get help for command"),
450 };
451
452 static int do_inkadiag_help(cmd_tbl_t *cmdtp, int flag,
453                             int argc, char *argv[]) {
454         extern int _do_help (cmd_tbl_t *cmd_start, int cmd_items,
455                              cmd_tbl_t *cmdtp, int flag,
456                              int argc, char *argv[]);
457         /* do_help prints command name - we prepend inkadiag to our subcommands! */
458 #ifdef CONFIG_SYS_LONGHELP
459         puts ("inkadiag ");
460 #endif
461         return _do_help(&cmd_inkadiag_sub[0],
462                 ARRAY_SIZE(cmd_inkadiag_sub), cmdtp, flag, argc, argv);
463 }
464
465 static int do_inkadiag(cmd_tbl_t *cmdtp, int flag, int argc,
466                        char *argv[]) {
467         cmd_tbl_t *c;
468
469         c = find_cmd_tbl(argv[1], &cmd_inkadiag_sub[0], ARRAY_SIZE(cmd_inkadiag_sub));
470
471         if (c) {
472                 argc--;
473                 argv++;
474                 return c->cmd(c, flag, argc, argv);
475         } else {
476                 /* Unrecognized command */
477                 cmd_usage(cmdtp);
478                 return 1;
479         }
480 }
481
482 U_BOOT_CMD(inkadiag, 6, 1, do_inkadiag,
483            "inkadiag - inka diagnosis\n",
484            "[inkadiag what ...]\n"
485            "    - perform a diagnosis on inka hardware\n"
486            "'inkadiag' performs hardware tests.");