2 * CFI parallel flash with Intel command set emulation
4 * Copyright (c) 2006 Thorsten Zitterell
5 * Copyright (c) 2005 Jocelyn Mayer
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA
23 * For now, this code can emulate flashes of 1, 2 or 4 bytes width.
24 * Supported commands/modes are:
31 * It does not support timings
32 * It does not support flash interleaving
33 * It does not implement software data protection as found in many real chips
34 * It does not implement erase suspend/resume commands
35 * It does not implement multiple sectors erase
37 * It does not implement much more ...
43 #include "qemu-timer.h"
45 #define PFLASH_BUG(fmt, args...) \
47 printf("PFLASH: Possible BUG - " fmt, ##args); \
51 /* #define PFLASH_DEBUG */
53 #define DPRINTF(fmt, args...) \
55 printf("PFLASH: " fmt , ##args); \
58 #define DPRINTF(fmt, args...) do { } while (0)
64 target_ulong sector_len;
65 target_ulong total_len;
67 int wcycle; /* if 0, the flash is read normally */
74 uint8_t cfi_table[0x52];
82 static void pflash_timer (void *opaque)
84 pflash_t *pfl = opaque;
86 DPRINTF("%s: command %02x done\n", __func__, pfl->cmd);
92 cpu_register_physical_memory(pfl->base, pfl->total_len,
93 pfl->off | IO_MEM_ROMD | pfl->fl_mem);
99 static uint32_t pflash_read (pflash_t *pfl, target_ulong offset, int width)
106 boff = offset & 0xFF; /* why this here ?? */
110 else if (pfl->width == 4)
113 DPRINTF("%s: reading offset " TARGET_FMT_lx " under cmd %02x width %d\n",
114 __func__, offset, pfl->cmd, width);
118 /* Flash area read */
123 DPRINTF("%s: data offset " TARGET_FMT_lx " %02x\n",
124 __func__, offset, ret);
127 #if defined(TARGET_WORDS_BIGENDIAN)
128 ret = p[offset] << 8;
129 ret |= p[offset + 1];
132 ret |= p[offset + 1] << 8;
134 DPRINTF("%s: data offset " TARGET_FMT_lx " %04x\n",
135 __func__, offset, ret);
138 #if defined(TARGET_WORDS_BIGENDIAN)
139 ret = p[offset] << 24;
140 ret |= p[offset + 1] << 16;
141 ret |= p[offset + 2] << 8;
142 ret |= p[offset + 3];
145 ret |= p[offset + 1] << 8;
146 ret |= p[offset + 1] << 8;
147 ret |= p[offset + 2] << 16;
148 ret |= p[offset + 3] << 24;
150 DPRINTF("%s: data offset " TARGET_FMT_lx " %08x\n",
151 __func__, offset, ret);
154 DPRINTF("BUG in %s\n", __func__);
158 case 0x20: /* Block erase */
159 case 0x50: /* Clear status register */
160 case 0x60: /* Block /un)lock */
161 case 0x70: /* Status Register */
162 case 0xe8: /* Write block */
163 /* Status register read */
165 DPRINTF("%s: status %x\n", __func__, ret);
167 case 0x98: /* Query mode */
168 if (boff > pfl->cfi_len)
171 ret = pfl->cfi_table[boff];
174 /* This should never happen : reset state & treat it as a read */
175 DPRINTF("%s: unknown command state: %x\n", __func__, pfl->cmd);
182 /* update flash content on disk */
183 static void pflash_update(pflash_t *pfl, int offset,
188 offset_end = offset + size;
189 /* round to sectors */
190 offset = offset >> 9;
191 offset_end = (offset_end + 511) >> 9;
192 bdrv_write(pfl->bs, offset, pfl->storage + (offset << 9),
193 offset_end - offset);
197 static void inline pflash_data_write(pflash_t *pfl, target_ulong offset,
198 uint32_t value, int width)
200 uint8_t *p = pfl->storage;
202 DPRINTF("%s: block write offset " TARGET_FMT_lx
203 " value %x counter " TARGET_FMT_lx "\n",
204 __func__, offset, value, pfl->counter);
208 pflash_update(pfl, offset, 1);
211 #if defined(TARGET_WORDS_BIGENDIAN)
212 p[offset] = value >> 8;
213 p[offset + 1] = value;
216 p[offset + 1] = value >> 8;
218 pflash_update(pfl, offset, 2);
221 #if defined(TARGET_WORDS_BIGENDIAN)
222 p[offset] = value >> 24;
223 p[offset + 1] = value >> 16;
224 p[offset + 2] = value >> 8;
225 p[offset + 3] = value;
228 p[offset + 1] = value >> 8;
229 p[offset + 2] = value >> 16;
230 p[offset + 3] = value >> 24;
232 pflash_update(pfl, offset, 4);
238 static void pflash_write (pflash_t *pfl, target_ulong offset, uint32_t value,
247 DPRINTF("%s: writing offset " TARGET_FMT_lx " value %08x width %d wcycle 0x%x\n",
248 __func__, offset, value, width, pfl->wcycle);
250 /* Set the device in I/O access mode */
251 cpu_register_physical_memory(pfl->base, pfl->total_len, pfl->fl_mem);
252 boff = offset & (pfl->sector_len - 1);
256 else if (pfl->width == 4)
259 switch (pfl->wcycle) {
265 case 0x10: /* Single Byte Program */
266 case 0x40: /* Single Byte Program */
267 DPRINTF(stderr, "%s: Single Byte Program\n", __func__);
269 case 0x20: /* Block erase */
271 offset &= ~(pfl->sector_len - 1);
273 DPRINTF("%s: block erase at " TARGET_FMT_lx " bytes "
275 __func__, offset, pfl->sector_len);
277 memset(p + offset, 0xff, pfl->sector_len);
278 pflash_update(pfl, offset, pfl->sector_len);
279 pfl->status |= 0x80; /* Ready! */
281 case 0x50: /* Clear status bits */
282 DPRINTF("%s: Clear status bits\n", __func__);
285 case 0x60: /* Block (un)lock */
286 DPRINTF("%s: Block unlock\n", __func__);
288 case 0x70: /* Status Register */
289 DPRINTF("%s: Read status register\n", __func__);
292 case 0x98: /* CFI query */
293 DPRINTF("%s: CFI query\n", __func__);
295 case 0xe8: /* Write to buffer */
296 DPRINTF("%s: Write to buffer\n", __func__);
297 pfl->status |= 0x80; /* Ready! */
299 case 0xff: /* Read array mode */
300 DPRINTF("%s: Read array mode\n", __func__);
310 case 0x10: /* Single Byte Program */
311 case 0x40: /* Single Byte Program */
312 DPRINTF("%s: Single Byte Program\n", __func__);
313 pflash_data_write(pfl, offset, value, width);
314 pfl->status |= 0x80; /* Ready! */
317 case 0x20: /* Block erase */
319 if (cmd == 0xd0) { /* confirm */
322 } else if (cmd == 0xff) { /* read array mode */
329 DPRINTF("%s: block write of %x bytes\n", __func__, value);
330 pfl->counter = value;
337 } else if (cmd == 0x01) {
340 } else if (cmd == 0xff) {
343 DPRINTF("%s: Unknown (un)locking command\n", __func__);
351 DPRINTF("%s: leaving query mode\n", __func__);
360 case 0xe8: /* Block write */
361 pflash_data_write(pfl, offset, value, width);
366 DPRINTF("%s: block write finished\n", __func__);
376 case 3: /* Confirm mode */
378 case 0xe8: /* Block write */
383 DPRINTF("%s: unknown command for \"write block\"\n", __func__);
384 PFLASH_BUG("Write block confirm");
393 /* Should never happen */
394 DPRINTF("%s: invalid write state\n", __func__);
400 printf("%s: Unimplemented flash cmd sequence "
401 "(offset " TARGET_FMT_lx ", wcycle 0x%x cmd 0x%x value 0x%x)\n",
402 __func__, offset, pfl->wcycle, pfl->cmd, value);
405 cpu_register_physical_memory(pfl->base, pfl->total_len,
406 pfl->off | IO_MEM_ROMD | pfl->fl_mem);
415 static uint32_t pflash_readb (void *opaque, target_phys_addr_t addr)
417 return pflash_read(opaque, addr, 1);
420 static uint32_t pflash_readw (void *opaque, target_phys_addr_t addr)
422 pflash_t *pfl = opaque;
424 return pflash_read(pfl, addr, 2);
427 static uint32_t pflash_readl (void *opaque, target_phys_addr_t addr)
429 pflash_t *pfl = opaque;
431 return pflash_read(pfl, addr, 4);
434 static void pflash_writeb (void *opaque, target_phys_addr_t addr,
437 pflash_write(opaque, addr, value, 1);
440 static void pflash_writew (void *opaque, target_phys_addr_t addr,
443 pflash_t *pfl = opaque;
445 pflash_write(pfl, addr, value, 2);
448 static void pflash_writel (void *opaque, target_phys_addr_t addr,
451 pflash_t *pfl = opaque;
453 pflash_write(pfl, addr, value, 4);
456 static CPUWriteMemoryFunc *pflash_write_ops[] = {
462 static CPUReadMemoryFunc *pflash_read_ops[] = {
468 /* Count trailing zeroes of a 32 bits quantity */
469 static int ctz32 (uint32_t n)
494 #if 0 /* This is not necessary as n is never 0 */
502 pflash_t *pflash_cfi01_register(target_phys_addr_t base, ram_addr_t off,
503 BlockDriverState *bs, uint32_t sector_len,
504 int nb_blocs, int width,
505 uint16_t id0, uint16_t id1,
506 uint16_t id2, uint16_t id3)
509 target_long total_len;
511 total_len = sector_len * nb_blocs;
513 /* XXX: to be fixed */
515 if (total_len != (8 * 1024 * 1024) && total_len != (16 * 1024 * 1024) &&
516 total_len != (32 * 1024 * 1024) && total_len != (64 * 1024 * 1024))
520 pfl = qemu_mallocz(sizeof(pflash_t));
524 pfl->storage = phys_ram_base + off;
525 pfl->fl_mem = cpu_register_io_memory(0,
526 pflash_read_ops, pflash_write_ops, pfl);
528 cpu_register_physical_memory(base, total_len,
529 off | pfl->fl_mem | IO_MEM_ROMD);
533 /* read the initial flash content */
534 bdrv_read(pfl->bs, 0, pfl->storage, total_len >> 9);
536 #if 0 /* XXX: there should be a bit to set up read-only,
537 * the same way the hardware does (with WP pin).
543 pfl->timer = qemu_new_timer(vm_clock, pflash_timer, pfl);
545 pfl->sector_len = sector_len;
546 pfl->total_len = total_len;
555 /* Hardcoded CFI table */
557 /* Standard "QRY" string */
558 pfl->cfi_table[0x10] = 'Q';
559 pfl->cfi_table[0x11] = 'R';
560 pfl->cfi_table[0x12] = 'Y';
561 /* Command set (Intel) */
562 pfl->cfi_table[0x13] = 0x01;
563 pfl->cfi_table[0x14] = 0x00;
564 /* Primary extended table address (none) */
565 pfl->cfi_table[0x15] = 0x31;
566 pfl->cfi_table[0x16] = 0x00;
567 /* Alternate command set (none) */
568 pfl->cfi_table[0x17] = 0x00;
569 pfl->cfi_table[0x18] = 0x00;
570 /* Alternate extended table (none) */
571 pfl->cfi_table[0x19] = 0x00;
572 pfl->cfi_table[0x1A] = 0x00;
574 pfl->cfi_table[0x1B] = 0x45;
576 pfl->cfi_table[0x1C] = 0x55;
577 /* Vpp min (no Vpp pin) */
578 pfl->cfi_table[0x1D] = 0x00;
579 /* Vpp max (no Vpp pin) */
580 pfl->cfi_table[0x1E] = 0x00;
582 pfl->cfi_table[0x1F] = 0x07;
583 /* Timeout for min size buffer write */
584 pfl->cfi_table[0x20] = 0x07;
585 /* Typical timeout for block erase */
586 pfl->cfi_table[0x21] = 0x0a;
587 /* Typical timeout for full chip erase (4096 ms) */
588 pfl->cfi_table[0x22] = 0x00;
590 pfl->cfi_table[0x23] = 0x04;
591 /* Max timeout for buffer write */
592 pfl->cfi_table[0x24] = 0x04;
593 /* Max timeout for block erase */
594 pfl->cfi_table[0x25] = 0x04;
595 /* Max timeout for chip erase */
596 pfl->cfi_table[0x26] = 0x00;
598 pfl->cfi_table[0x27] = ctz32(total_len); // + 1;
599 /* Flash device interface (8 & 16 bits) */
600 pfl->cfi_table[0x28] = 0x02;
601 pfl->cfi_table[0x29] = 0x00;
602 /* Max number of bytes in multi-bytes write */
603 pfl->cfi_table[0x2A] = 0x0B;
604 pfl->cfi_table[0x2B] = 0x00;
605 /* Number of erase block regions (uniform) */
606 pfl->cfi_table[0x2C] = 0x01;
607 /* Erase block region 1 */
608 pfl->cfi_table[0x2D] = nb_blocs - 1;
609 pfl->cfi_table[0x2E] = (nb_blocs - 1) >> 8;
610 pfl->cfi_table[0x2F] = sector_len >> 8;
611 pfl->cfi_table[0x30] = sector_len >> 16;
614 pfl->cfi_table[0x31] = 'P';
615 pfl->cfi_table[0x32] = 'R';
616 pfl->cfi_table[0x33] = 'I';
618 pfl->cfi_table[0x34] = '1';
619 pfl->cfi_table[0x35] = '1';
621 pfl->cfi_table[0x36] = 0x00;
622 pfl->cfi_table[0x37] = 0x00;
623 pfl->cfi_table[0x38] = 0x00;
624 pfl->cfi_table[0x39] = 0x00;
626 pfl->cfi_table[0x3a] = 0x00;
628 pfl->cfi_table[0x3b] = 0x00;
629 pfl->cfi_table[0x3c] = 0x00;