1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * (C) Copyright 2000-2003
4 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 */
6
7 #include <common.h>
8 #include <console.h>
9 #include <cpu_func.h>
10 #include <flash.h>
11 #include <irq_func.h>
12 #include <uuid.h>
13 #include <linux/delay.h>
14
15 #define PHYS_FLASH_1 CONFIG_SYS_FLASH_BASE
16 #define FLASH_BANK_SIZE 0x200000
17
18 flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
19
flash_print_info(flash_info_t * info)20 void flash_print_info(flash_info_t *info)
21 {
22 int i;
23
24 switch (info->flash_id & FLASH_VENDMASK) {
25 case (AMD_MANUFACT & FLASH_VENDMASK):
26 printf ("AMD: ");
27 break;
28 default:
29 printf ("Unknown Vendor ");
30 break;
31 }
32
33 switch (info->flash_id & FLASH_TYPEMASK) {
34 case (AMD_ID_PL160CB & FLASH_TYPEMASK):
35 printf ("AM29PL160CB (16Mbit)\n");
36 break;
37 default:
38 printf ("Unknown Chip Type\n");
39 goto Done;
40 break;
41 }
42
43 printf (" Size: %ld MB in %d Sectors\n",
44 info->size >> 20, info->sector_count);
45
46 printf (" Sector Start Addresses:");
47 for (i = 0; i < info->sector_count; i++) {
48 if ((i % 5) == 0) {
49 printf ("\n ");
50 }
51 printf (" %08lX%s", info->start[i],
52 info->protect[i] ? " (RO)" : " ");
53 }
54 printf ("\n");
55
56 Done:
57 return;
58 }
59
60
flash_init(void)61 unsigned long flash_init(void)
62 {
63 int i, j;
64 ulong size = 0;
65
66 for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
67 ulong flashbase = 0;
68
69 flash_info[i].flash_id =
70 (AMD_MANUFACT & FLASH_VENDMASK) |
71 (AMD_ID_PL160CB & FLASH_TYPEMASK);
72 flash_info[i].size = FLASH_BANK_SIZE;
73 flash_info[i].sector_count = CONFIG_SYS_MAX_FLASH_SECT;
74 memset (flash_info[i].protect, 0, CONFIG_SYS_MAX_FLASH_SECT);
75 if (i == 0)
76 flashbase = PHYS_FLASH_1;
77 else
78 panic ("configured to many flash banks!\n");
79
80 for (j = 0; j < flash_info[i].sector_count; j++) {
81 if (j == 0) {
82 /* 1st is 16 KiB */
83 flash_info[i].start[j] = flashbase;
84 }
85 if ((j >= 1) && (j <= 2)) {
86 /* 2nd and 3rd are 8 KiB */
87 flash_info[i].start[j] =
88 flashbase + 0x4000 + 0x2000 * (j - 1);
89 }
90 if (j == 3) {
91 /* 4th is 224 KiB */
92 flash_info[i].start[j] = flashbase + 0x8000;
93 }
94 if ((j >= 4) && (j <= 10)) {
95 /* rest is 256 KiB */
96 flash_info[i].start[j] =
97 flashbase + 0x40000 + 0x40000 * (j -
98 4);
99 }
100 }
101 size += flash_info[i].size;
102 }
103
104 flash_protect(FLAG_PROTECT_SET,
105 CONFIG_SYS_FLASH_BASE,
106 CONFIG_SYS_FLASH_BASE + 0x3ffff, &flash_info[0]);
107
108 return size;
109 }
110
111
112 #define CMD_READ_ARRAY 0x00F0
113 #define CMD_UNLOCK1 0x00AA
114 #define CMD_UNLOCK2 0x0055
115 #define CMD_ERASE_SETUP 0x0080
116 #define CMD_ERASE_CONFIRM 0x0030
117 #define CMD_PROGRAM 0x00A0
118 #define CMD_UNLOCK_BYPASS 0x0020
119
120 #define MEM_FLASH_ADDR1 (*(volatile u16 *)(CONFIG_SYS_FLASH_BASE + (0x00000555<<1)))
121 #define MEM_FLASH_ADDR2 (*(volatile u16 *)(CONFIG_SYS_FLASH_BASE + (0x000002AA<<1)))
122
123 #define BIT_ERASE_DONE 0x0080
124 #define BIT_RDY_MASK 0x0080
125 #define BIT_PROGRAM_ERROR 0x0020
126 #define BIT_TIMEOUT 0x80000000 /* our flag */
127
128 #define READY 1
129 #define ERR 2
130 #define TMO 4
131
132
flash_erase(flash_info_t * info,int s_first,int s_last)133 int flash_erase(flash_info_t *info, int s_first, int s_last)
134 {
135 ulong result;
136 int iflag, cflag, prot, sect;
137 int rc = ERR_OK;
138 int chip1;
139 ulong start;
140
141 /* first look for protection bits */
142
143 if (info->flash_id == FLASH_UNKNOWN)
144 return ERR_UNKNOWN_FLASH_TYPE;
145
146 if ((s_first < 0) || (s_first > s_last)) {
147 return ERR_INVAL;
148 }
149
150 if ((info->flash_id & FLASH_VENDMASK) !=
151 (AMD_MANUFACT & FLASH_VENDMASK)) {
152 return ERR_UNKNOWN_FLASH_VENDOR;
153 }
154
155 prot = 0;
156 for (sect = s_first; sect <= s_last; ++sect) {
157 if (info->protect[sect]) {
158 prot++;
159 }
160 }
161 if (prot)
162 return ERR_PROTECTED;
163
164 /*
165 * Disable interrupts which might cause a timeout
166 * here. Remember that our exception vectors are
167 * at address 0 in the flash, and we don't want a
168 * (ticker) exception to happen while the flash
169 * chip is in programming mode.
170 */
171
172 cflag = icache_status();
173 icache_disable();
174 iflag = disable_interrupts();
175
176 printf ("\n");
177
178 /* Start erase on unprotected sectors */
179 for (sect = s_first; sect <= s_last && !ctrlc (); sect++) {
180 printf ("Erasing sector %2d ... ", sect);
181
182 /* arm simple, non interrupt dependent timer */
183 start = get_timer(0);
184
185 if (info->protect[sect] == 0) { /* not protected */
186 volatile u16 *addr =
187 (volatile u16 *) (info->start[sect]);
188
189 MEM_FLASH_ADDR1 = CMD_UNLOCK1;
190 MEM_FLASH_ADDR2 = CMD_UNLOCK2;
191 MEM_FLASH_ADDR1 = CMD_ERASE_SETUP;
192
193 MEM_FLASH_ADDR1 = CMD_UNLOCK1;
194 MEM_FLASH_ADDR2 = CMD_UNLOCK2;
195 *addr = CMD_ERASE_CONFIRM;
196
197 /* wait until flash is ready */
198 chip1 = 0;
199
200 do {
201 result = *addr;
202
203 /* check timeout */
204 if (get_timer(start) > CONFIG_SYS_FLASH_ERASE_TOUT) {
205 MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
206 chip1 = TMO;
207 break;
208 }
209
210 if (!chip1
211 && (result & 0xFFFF) & BIT_ERASE_DONE)
212 chip1 = READY;
213
214 } while (!chip1);
215
216 MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
217
218 if (chip1 == ERR) {
219 rc = ERR_PROG_ERROR;
220 goto outahere;
221 }
222 if (chip1 == TMO) {
223 rc = ERR_TIMEOUT;
224 goto outahere;
225 }
226
227 printf ("ok.\n");
228 } else { /* it was protected */
229
230 printf ("protected!\n");
231 }
232 }
233
234 if (ctrlc ())
235 printf ("User Interrupt!\n");
236
237 outahere:
238 /* allow flash to settle - wait 10 ms */
239 mdelay(10);
240
241 if (iflag)
242 enable_interrupts();
243
244 if (cflag)
245 icache_enable();
246
247 return rc;
248 }
249
write_word(flash_info_t * info,ulong dest,ulong data)250 static int write_word(flash_info_t *info, ulong dest, ulong data)
251 {
252 volatile u16 *addr = (volatile u16 *) dest;
253 ulong result;
254 int rc = ERR_OK;
255 int cflag, iflag;
256 int chip1;
257 ulong start;
258
259 /*
260 * Check if Flash is (sufficiently) erased
261 */
262 result = *addr;
263 if ((result & data) != data)
264 return ERR_NOT_ERASED;
265
266
267 /*
268 * Disable interrupts which might cause a timeout
269 * here. Remember that our exception vectors are
270 * at address 0 in the flash, and we don't want a
271 * (ticker) exception to happen while the flash
272 * chip is in programming mode.
273 */
274
275 cflag = icache_status();
276 icache_disable();
277 iflag = disable_interrupts();
278
279 MEM_FLASH_ADDR1 = CMD_UNLOCK1;
280 MEM_FLASH_ADDR2 = CMD_UNLOCK2;
281 MEM_FLASH_ADDR1 = CMD_PROGRAM;
282 *addr = data;
283
284 /* arm simple, non interrupt dependent timer */
285 start = get_timer(0);
286
287 /* wait until flash is ready */
288 chip1 = 0;
289 do {
290 result = *addr;
291
292 /* check timeout */
293 if (get_timer(start) > CONFIG_SYS_FLASH_ERASE_TOUT) {
294 chip1 = ERR | TMO;
295 break;
296 }
297 if (!chip1 && ((result & 0x80) == (data & 0x80)))
298 chip1 = READY;
299
300 } while (!chip1);
301
302 *addr = CMD_READ_ARRAY;
303
304 if (chip1 == ERR || *addr != data)
305 rc = ERR_PROG_ERROR;
306
307 if (iflag)
308 enable_interrupts();
309
310 if (cflag)
311 icache_enable();
312
313 return rc;
314 }
315
316
write_buff(flash_info_t * info,uchar * src,ulong addr,ulong cnt)317 int write_buff(flash_info_t *info, uchar *src, ulong addr, ulong cnt)
318 {
319 ulong wp, data;
320 int rc;
321
322 if (addr & 1) {
323 printf ("unaligned destination not supported\n");
324 return ERR_ALIGN;
325 }
326
327 #if 0
328 if (cnt & 1) {
329 printf ("odd transfer sizes not supported\n");
330 return ERR_ALIGN;
331 }
332 #endif
333
334 wp = addr;
335
336 if (addr & 1) {
337 data = (*((volatile u8 *) addr) << 8) | *((volatile u8 *)
338 src);
339 if ((rc = write_word (info, wp - 1, data)) != 0) {
340 return (rc);
341 }
342 src += 1;
343 wp += 1;
344 cnt -= 1;
345 }
346
347 while (cnt >= 2) {
348 data = *((volatile u16 *) src);
349 if ((rc = write_word (info, wp, data)) != 0) {
350 return (rc);
351 }
352 src += 2;
353 wp += 2;
354 cnt -= 2;
355 }
356
357 if (cnt == 1) {
358 data = (*((volatile u8 *) src) << 8) |
359 *((volatile u8 *) (wp + 1));
360 if ((rc = write_word (info, wp, data)) != 0) {
361 return (rc);
362 }
363 src += 1;
364 wp += 1;
365 cnt -= 1;
366 }
367
368 return ERR_OK;
369 }
370