summaryrefslogtreecommitdiffstats
path: root/board/micronas/vct/smc_eeprom.c
blob: 6587f13e2f383f03bebd7f983ded93d676f92fbb (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
/*
 * (C) Copyright 2008 Stefan Roese <sr@denx.de>, DENX Software Engineering
 *
 * Copyright 2005, Seagate Technology LLC
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 *
 */

#undef DEBUG

#include <common.h>
#include <command.h>
#include <config.h>
#include <net.h>

#include "vct.h"

#define SMSC9118_BASE		CONFIG_DRIVER_SMC911X_BASE
#define BYTE_TEST		(SMSC9118_BASE + 0x64)
#define GPIO_CFG		(SMSC9118_BASE + 0x88)
#define MAC_CSR_CMD		(SMSC9118_BASE + 0xA4)
#define  MAC_CSR_CMD_CSR_BUSY	(0x80000000)
#define  MAC_CSR_CMD_RNW	(0x40000000)
#define  MAC_RD_CMD(reg)	((reg & 0x000000FF) |			\
				 (MAC_CSR_CMD_CSR_BUSY | MAC_CSR_CMD_RNW))
#define  MAC_WR_CMD(reg)	((reg & 0x000000FF) |		\
				 (MAC_CSR_CMD_CSR_BUSY))
#define MAC_CSR_DATA		(SMSC9118_BASE + 0xA8)
#define E2P_CMD			(SMSC9118_BASE + 0xB0)
#define  E2P_CMD_EPC_BUSY_	(0x80000000UL)	/* Self Clearing */
#define  E2P_CMD_EPC_CMD_	(0x70000000UL)	/* R/W */
#define  E2P_CMD_EPC_CMD_READ_	(0x00000000UL)	/* R/W */
#define  E2P_CMD_EPC_CMD_EWDS_	(0x10000000UL)	/* R/W */
#define  E2P_CMD_EPC_CMD_EWEN_	(0x20000000UL)	/* R/W */
#define  E2P_CMD_EPC_CMD_WRITE_	(0x30000000UL)	/* R/W */
#define  E2P_CMD_EPC_CMD_WRAL_	(0x40000000UL)	/* R/W */
#define  E2P_CMD_EPC_CMD_ERASE_	(0x50000000UL)	/* R/W */
#define  E2P_CMD_EPC_CMD_ERAL_	(0x60000000UL)	/* R/W */
#define  E2P_CMD_EPC_CMD_RELOAD_ (0x70000000UL)	/* R/W */
#define  E2P_CMD_EPC_TIMEOUT_	(0x00000200UL)	/* R */
#define  E2P_CMD_MAC_ADDR_LOADED_ (0x00000100UL) /* RO */
#define  E2P_CMD_EPC_ADDR_	(0x000000FFUL)	/* R/W */
#define E2P_DATA		(SMSC9118_BASE + 0xB4)

#define MAC_ADDRH		(0x2)
#define MAC_ADDRL		(0x3)

#define MAC_TIMEOUT		200

#define HIBYTE(word)		((u8)(((u16)(word)) >> 8))
#define LOBYTE(word)		((u8)(((u16)(word)) & 0x00FFU))
#define HIWORD(dword)		((u16)(((u32)(dword)) >> 16))
#define LOWORD(dword)		((u16)(((u32)(dword)) & 0x0000FFFFUL))

static int mac_busy(int req_to)
{
	int timeout = req_to;

	while (timeout--) {
		if (!(smc911x_reg_read(MAC_CSR_CMD) & MAC_CSR_CMD_CSR_BUSY))
			goto done;
	}
	return 1;		/* Timeout */

done:
	return 0;		/* No timeout */
}

static ulong get_mac_reg(int reg)
{
	ulong reg_val = 0xffffffff;

	if (smc911x_reg_read(MAC_CSR_CMD) & MAC_CSR_CMD_CSR_BUSY) {
		printf("get_mac_reg: previous command not complete\n");
		goto done;
	}

	smc911x_reg_write(MAC_CSR_CMD, MAC_RD_CMD(reg));
	udelay(10000);

	if (mac_busy(MAC_TIMEOUT) == 1) {
		printf("get_mac_reg: timeout waiting for response from MAC\n");
		goto done;
	}

	reg_val = smc911x_reg_read(MAC_CSR_DATA);

done:
	return (reg_val);
}

static ulong eeprom_enable_access(void)
{
	ulong gpio;

	gpio = smc911x_reg_read(GPIO_CFG);
	debug("%s: gpio= 0x%08lx ---> 0x%08lx\n", __func__, gpio,
	      (gpio & 0xFF0FFFFFUL));

	smc911x_reg_write(GPIO_CFG, (gpio & 0xFF0FFFFFUL));
	return gpio;
}

static void eeprom_disable_access(ulong gpio)
{
	debug("%s: gpio= 0x%08lx\n", __func__, gpio);
	smc911x_reg_write(GPIO_CFG, gpio);
}

static int eeprom_is_mac_address_loaded(void)
{
	int ret;

	ret = smc911x_reg_read(MAC_CSR_CMD) & E2P_CMD_MAC_ADDR_LOADED_;
	debug("%s: ret = %x\n", __func__, ret);

	return ret;
}

static int eeprom_read_location(unchar address, u8 *data)
{
	ulong timeout = 100000;
	ulong temp = 0;

	if ((temp = smc911x_reg_read(E2P_CMD)) & E2P_CMD_EPC_BUSY_) {
		printf("%s: Busy at start, E2P_CMD=0x%08lX\n", __func__, temp);
		return 0;
	}

	smc911x_reg_write(E2P_CMD,
			  (E2P_CMD_EPC_BUSY_ | E2P_CMD_EPC_CMD_READ_ |
			   ((ulong) address)));

	while ((timeout > 0) && (smc911x_reg_read(E2P_CMD) & E2P_CMD_EPC_BUSY_)) {
		udelay(10);
		timeout--;
	}

	if (timeout == 0) {
		printf("Timeout\n");
		return 0;
	}
	(*data) = (unchar) (smc911x_reg_read(E2P_DATA));
	debug("%s: ret = %x\n", __func__, (*data));

	return 1;
}

static int eeprom_enable_erase_and_write(void)
{
	ulong timeout = 100000;

	if (smc911x_reg_read(E2P_CMD) & E2P_CMD_EPC_BUSY_) {
		printf("%s: Busy at start\n", __func__);
		return 0;
	}
	smc911x_reg_write(E2P_CMD, (E2P_CMD_EPC_BUSY_ | E2P_CMD_EPC_CMD_EWEN_));

	while ((timeout > 0) && (smc911x_reg_read(E2P_CMD) & E2P_CMD_EPC_BUSY_)) {
		udelay(10);
		timeout--;
	}

	if (timeout == 0) {
		printf("Timeout[1]\n");
		return 0;
	}

	return 1;
}

static int eeprom_disable_erase_and_write(void)
{
	ulong timeout = 100000;

	if (smc911x_reg_read(E2P_CMD) & E2P_CMD_EPC_BUSY_) {
		printf("%s: Busy at start\n", __func__);
		return 0;
	}
	smc911x_reg_write(E2P_CMD, (E2P_CMD_EPC_BUSY_ | E2P_CMD_EPC_CMD_EWDS_));

	while ((timeout > 0) && (smc911x_reg_read(E2P_CMD) & E2P_CMD_EPC_BUSY_)) {
		udelay(10);
		timeout--;
	}

	if (timeout == 0) {
		printf("Timeout[2]\n");
		return 0;
	}

	return 1;
}

static int eeprom_write_location(unchar address, unchar data)
{
	ulong timeout = 100000;

	debug("%s: address: %x data = %x\n", __func__, address, data);

	if (smc911x_reg_read(E2P_CMD) & E2P_CMD_EPC_BUSY_) {
		printf("%s: Busy at start\n", __func__);
		return 0;
	}

	smc911x_reg_write(E2P_DATA, ((ulong) data));
	smc911x_reg_write(E2P_CMD,
			  (E2P_CMD_EPC_BUSY_ | E2P_CMD_EPC_CMD_WRITE_ |
			   ((ulong) address)));

	while ((timeout > 0) && (smc911x_reg_read(E2P_CMD) & E2P_CMD_EPC_BUSY_)) {
		udelay(10);
		timeout--;
	}

	if (timeout == 0) {
		printf("Timeout[3]\n");
		return 0;
	}

	return 1;
}

static int eeprom_erase_all(void)
{
	ulong timeout = 100000;

	if (smc911x_reg_read(E2P_CMD) & E2P_CMD_EPC_BUSY_) {
		printf("%s: Busy at start\n", __func__);
		return 0;
	}

	smc911x_reg_write(E2P_CMD, (E2P_CMD_EPC_BUSY_ | E2P_CMD_EPC_CMD_ERAL_));

	while ((timeout > 0) && (smc911x_reg_read(E2P_CMD) & E2P_CMD_EPC_BUSY_)) {
		udelay(10);
		timeout--;
	}

	if (timeout == 0) {
		printf("Timeout[4]\n");
		return 0;
	}

	return 1;
}

static int eeprom_reload(void)
{
	ulong timeout = 100000;

	if (smc911x_reg_read(E2P_CMD) & E2P_CMD_EPC_BUSY_) {
		printf("%s: Busy at start\n", __func__);
		return -1;
	}
	smc911x_reg_write(E2P_CMD,
			  (E2P_CMD_EPC_BUSY_ | E2P_CMD_EPC_CMD_RELOAD_));

	while ((timeout > 0) && (smc911x_reg_read(E2P_CMD) & E2P_CMD_EPC_BUSY_)) {
		udelay(10);
		timeout--;
	}

	if (timeout == 0)
		return 0;

	return 1;
}

static int eeprom_save_mac_address(ulong dwHi16, ulong dwLo32)
{
	int result = 0;

	debug("%s: dwHI: 0x%08lx dwLO: %08lx, \n", __func__, dwHi16, dwLo32);

	if (!eeprom_enable_erase_and_write())
		goto DONE;
	if (!eeprom_erase_all())
		goto DONE;
	if (!eeprom_write_location(0, 0xA5))
		goto DONE;
	if (!eeprom_write_location(1, LOBYTE(LOWORD(dwLo32))))
		goto DONE;
	if (!eeprom_write_location(2, HIBYTE(LOWORD(dwLo32))))
		goto DONE;
	if (!eeprom_write_location(3, LOBYTE(HIWORD(dwLo32))))
		goto DONE;
	if (!eeprom_write_location(4, HIBYTE(HIWORD(dwLo32))))
		goto DONE;
	if (!eeprom_write_location(5, LOBYTE(LOWORD(dwHi16))))
		goto DONE;
	if (!eeprom_write_location(6, HIBYTE(LOWORD(dwHi16))))
		goto DONE;
	if (!eeprom_disable_erase_and_write())
		goto DONE;

	result = 1;

DONE:
	return result;
}

static int do_eeprom_dump(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
	unchar data = 0, index = 0;
	ulong gpio_old_val;

	gpio_old_val = eeprom_enable_access();

	printf("EEPROM content: \n");
	for (index = 0; index < 8; index++) {
		if (eeprom_read_location(index, &data))
			printf("%02x ", data);
		else
			printf("FAILED");
	}

	eeprom_disable_access(gpio_old_val);
	printf("\n");

	return 0;
}

static int do_eeprom_erase_all(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
	eeprom_erase_all();

	return 0;
}

static int do_eeprom_save_mac(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
	ulong hi16, lo32;
	unchar ethaddr[6], i;
	ulong gpio;
	char *tmp, *end;

	tmp = argv[1];
	for (i = 0; i < 6; i++) {
		ethaddr[i] = tmp ? simple_strtoul(tmp, &end, 16) : 0;
		if (tmp)
			tmp = (*end) ? end + 1 : end;
	}

	hi16 = (ethaddr[5] << 8) | (ethaddr[4]);
	lo32 = (ethaddr[3] << 24) | (ethaddr[2] << 16) |
		(ethaddr[1] << 8) | (ethaddr[0]);

	gpio = eeprom_enable_access();

	eeprom_save_mac_address(hi16, lo32);

	eeprom_reload();

	/* Check new values */
	if (eeprom_is_mac_address_loaded()) {
		ulong mac_hi16, mac_lo32;

		mac_hi16 = get_mac_reg(MAC_ADDRH);
		mac_lo32 = get_mac_reg(MAC_ADDRL);
		printf("New MAC address: %lx, %lx\n", mac_hi16, mac_lo32);
	} else {
		printf("Address is not reloaded \n");
	}
	eeprom_disable_access(gpio);

	return 0;
}

U_BOOT_CMD(smcee, 1, 0, do_eeprom_erase_all,
	   "smcee   - Erase content of SMC EEPROM",);

U_BOOT_CMD(smced, 1, 0, do_eeprom_dump,
	   "smced   - Dump content of SMC EEPROM",);

U_BOOT_CMD(smcew, 2, 0, do_eeprom_save_mac,
	   "smcew   - Write MAC address to SMC EEPROM\n",
	   "aa:bb:cc:dd:ee:ff  new mac address");
OpenPOWER on IntegriCloud