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, see <http://www.gnu.org/licenses/>.
22 * For now, this code can emulate flashes of 1, 2 or 4 bytes width.
23 * Supported commands/modes are:
30 * It does not support timings
31 * It does not support flash interleaving
32 * It does not implement software data protection as found in many real chips
33 * It does not implement erase suspend/resume commands
34 * It does not implement multiple sectors erase
36 * It does not implement much more ...
42 #include "qemu-timer.h"
44 #define PFLASH_BUG(fmt, ...) \
46 printf("PFLASH: Possible BUG - " fmt, ## __VA_ARGS__); \
50 /* #define PFLASH_DEBUG */
52 #define DPRINTF(fmt, ...) \
54 printf("PFLASH: " fmt , ## __VA_ARGS__); \
57 #define DPRINTF(fmt, ...) do { } while (0)
62 target_phys_addr_t base;
63 target_phys_addr_t sector_len;
64 target_phys_addr_t total_len;
66 int wcycle; /* if 0, the flash is read normally */
73 uint8_t cfi_table[0x52];
74 target_phys_addr_t counter;
75 unsigned int writeblock_size;
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_phys_addr_t offset,
102 target_phys_addr_t boff;
107 boff = offset & 0xFF; /* why this here ?? */
111 else if (pfl->width == 4)
115 DPRINTF("%s: reading offset " TARGET_FMT_plx " under cmd %02x width %d\n",
116 __func__, offset, pfl->cmd, width);
120 /* Flash area read */
125 DPRINTF("%s: data offset " TARGET_FMT_plx " %02x\n",
126 __func__, offset, ret);
130 ret = p[offset] << 8;
131 ret |= p[offset + 1];
134 ret |= p[offset + 1] << 8;
136 DPRINTF("%s: data offset " TARGET_FMT_plx " %04x\n",
137 __func__, offset, ret);
141 ret = p[offset] << 24;
142 ret |= p[offset + 1] << 16;
143 ret |= p[offset + 2] << 8;
144 ret |= p[offset + 3];
147 ret |= p[offset + 1] << 8;
148 ret |= p[offset + 1] << 8;
149 ret |= p[offset + 2] << 16;
150 ret |= p[offset + 3] << 24;
152 DPRINTF("%s: data offset " TARGET_FMT_plx " %08x\n",
153 __func__, offset, ret);
156 DPRINTF("BUG in %s\n", __func__);
160 case 0x20: /* Block erase */
161 case 0x50: /* Clear status register */
162 case 0x60: /* Block /un)lock */
163 case 0x70: /* Status Register */
164 case 0xe8: /* Write block */
165 /* Status register read */
167 DPRINTF("%s: status %x\n", __func__, ret);
172 ret = pfl->ident[0] << 8 | pfl->ident[1];
173 DPRINTF("%s: Manufacturer Code %04x\n", __func__, ret);
176 ret = pfl->ident[2] << 8 | pfl->ident[3];
177 DPRINTF("%s: Device ID Code %04x\n", __func__, ret);
180 DPRINTF("%s: Read Device Information boff=%x\n", __func__, boff);
185 case 0x98: /* Query mode */
186 if (boff > pfl->cfi_len)
189 ret = pfl->cfi_table[boff];
192 /* This should never happen : reset state & treat it as a read */
193 DPRINTF("%s: unknown command state: %x\n", __func__, pfl->cmd);
200 /* update flash content on disk */
201 static void pflash_update(pflash_t *pfl, int offset,
206 offset_end = offset + size;
207 /* round to sectors */
208 offset = offset >> 9;
209 offset_end = (offset_end + 511) >> 9;
210 bdrv_write(pfl->bs, offset, pfl->storage + (offset << 9),
211 offset_end - offset);
215 static inline void pflash_data_write(pflash_t *pfl, target_phys_addr_t offset,
216 uint32_t value, int width, int be)
218 uint8_t *p = pfl->storage;
220 DPRINTF("%s: block write offset " TARGET_FMT_plx
221 " value %x counter " TARGET_FMT_plx "\n",
222 __func__, offset, value, pfl->counter);
229 p[offset] = value >> 8;
230 p[offset + 1] = value;
233 p[offset + 1] = value >> 8;
238 p[offset] = value >> 24;
239 p[offset + 1] = value >> 16;
240 p[offset + 2] = value >> 8;
241 p[offset + 3] = value;
244 p[offset + 1] = value >> 8;
245 p[offset + 2] = value >> 16;
246 p[offset + 3] = value >> 24;
253 static void pflash_write(pflash_t *pfl, target_phys_addr_t offset,
254 uint32_t value, int width, int be)
261 DPRINTF("%s: writing offset " TARGET_FMT_plx " value %08x width %d wcycle 0x%x\n",
262 __func__, offset, value, width, pfl->wcycle);
265 /* Set the device in I/O access mode */
266 cpu_register_physical_memory(pfl->base, pfl->total_len, pfl->fl_mem);
269 switch (pfl->wcycle) {
275 case 0x10: /* Single Byte Program */
276 case 0x40: /* Single Byte Program */
277 DPRINTF("%s: Single Byte Program\n", __func__);
279 case 0x20: /* Block erase */
281 offset &= ~(pfl->sector_len - 1);
283 DPRINTF("%s: block erase at " TARGET_FMT_plx " bytes "
285 __func__, offset, pfl->sector_len);
287 memset(p + offset, 0xff, pfl->sector_len);
288 pflash_update(pfl, offset, pfl->sector_len);
289 pfl->status |= 0x80; /* Ready! */
291 case 0x50: /* Clear status bits */
292 DPRINTF("%s: Clear status bits\n", __func__);
295 case 0x60: /* Block (un)lock */
296 DPRINTF("%s: Block unlock\n", __func__);
298 case 0x70: /* Status Register */
299 DPRINTF("%s: Read status register\n", __func__);
302 case 0x90: /* Read Device ID */
303 DPRINTF("%s: Read Device information\n", __func__);
306 case 0x98: /* CFI query */
307 DPRINTF("%s: CFI query\n", __func__);
309 case 0xe8: /* Write to buffer */
310 DPRINTF("%s: Write to buffer\n", __func__);
311 pfl->status |= 0x80; /* Ready! */
313 case 0xff: /* Read array mode */
314 DPRINTF("%s: Read array mode\n", __func__);
324 case 0x10: /* Single Byte Program */
325 case 0x40: /* Single Byte Program */
326 DPRINTF("%s: Single Byte Program\n", __func__);
327 pflash_data_write(pfl, offset, value, width, be);
328 pflash_update(pfl, offset, width);
329 pfl->status |= 0x80; /* Ready! */
332 case 0x20: /* Block erase */
334 if (cmd == 0xd0) { /* confirm */
337 } else if (cmd == 0xff) { /* read array mode */
344 DPRINTF("%s: block write of %x bytes\n", __func__, value);
345 pfl->counter = value;
352 } else if (cmd == 0x01) {
355 } else if (cmd == 0xff) {
358 DPRINTF("%s: Unknown (un)locking command\n", __func__);
366 DPRINTF("%s: leaving query mode\n", __func__);
375 case 0xe8: /* Block write */
376 pflash_data_write(pfl, offset, value, width, be);
381 target_phys_addr_t mask = pfl->writeblock_size - 1;
384 DPRINTF("%s: block write finished\n", __func__);
386 /* Flush the entire write buffer onto backing storage. */
387 pflash_update(pfl, offset & mask, pfl->writeblock_size);
396 case 3: /* Confirm mode */
398 case 0xe8: /* Block write */
403 DPRINTF("%s: unknown command for \"write block\"\n", __func__);
404 PFLASH_BUG("Write block confirm");
413 /* Should never happen */
414 DPRINTF("%s: invalid write state\n", __func__);
420 printf("%s: Unimplemented flash cmd sequence "
421 "(offset " TARGET_FMT_plx ", wcycle 0x%x cmd 0x%x value 0x%x)\n",
422 __func__, offset, pfl->wcycle, pfl->cmd, value);
425 cpu_register_physical_memory(pfl->base, pfl->total_len,
426 pfl->off | IO_MEM_ROMD | pfl->fl_mem);
435 static uint32_t pflash_readb_be(void *opaque, target_phys_addr_t addr)
437 return pflash_read(opaque, addr, 1, 1);
440 static uint32_t pflash_readb_le(void *opaque, target_phys_addr_t addr)
442 return pflash_read(opaque, addr, 1, 0);
445 static uint32_t pflash_readw_be(void *opaque, target_phys_addr_t addr)
447 pflash_t *pfl = opaque;
449 return pflash_read(pfl, addr, 2, 1);
452 static uint32_t pflash_readw_le(void *opaque, target_phys_addr_t addr)
454 pflash_t *pfl = opaque;
456 return pflash_read(pfl, addr, 2, 0);
459 static uint32_t pflash_readl_be(void *opaque, target_phys_addr_t addr)
461 pflash_t *pfl = opaque;
463 return pflash_read(pfl, addr, 4, 1);
466 static uint32_t pflash_readl_le(void *opaque, target_phys_addr_t addr)
468 pflash_t *pfl = opaque;
470 return pflash_read(pfl, addr, 4, 0);
473 static void pflash_writeb_be(void *opaque, target_phys_addr_t addr,
476 pflash_write(opaque, addr, value, 1, 1);
479 static void pflash_writeb_le(void *opaque, target_phys_addr_t addr,
482 pflash_write(opaque, addr, value, 1, 0);
485 static void pflash_writew_be(void *opaque, target_phys_addr_t addr,
488 pflash_t *pfl = opaque;
490 pflash_write(pfl, addr, value, 2, 1);
493 static void pflash_writew_le(void *opaque, target_phys_addr_t addr,
496 pflash_t *pfl = opaque;
498 pflash_write(pfl, addr, value, 2, 0);
501 static void pflash_writel_be(void *opaque, target_phys_addr_t addr,
504 pflash_t *pfl = opaque;
506 pflash_write(pfl, addr, value, 4, 1);
509 static void pflash_writel_le(void *opaque, target_phys_addr_t addr,
512 pflash_t *pfl = opaque;
514 pflash_write(pfl, addr, value, 4, 0);
517 static CPUWriteMemoryFunc * const pflash_write_ops_be[] = {
523 static CPUReadMemoryFunc * const pflash_read_ops_be[] = {
529 static CPUWriteMemoryFunc * const pflash_write_ops_le[] = {
535 static CPUReadMemoryFunc * const pflash_read_ops_le[] = {
541 /* Count trailing zeroes of a 32 bits quantity */
542 static int ctz32 (uint32_t n)
565 #if 0 /* This is not necessary as n is never 0 */
569 #if 0 /* This is not necessary as n is never 0 */
577 pflash_t *pflash_cfi01_register(target_phys_addr_t base, ram_addr_t off,
578 BlockDriverState *bs, uint32_t sector_len,
579 int nb_blocs, int width,
580 uint16_t id0, uint16_t id1,
581 uint16_t id2, uint16_t id3,
585 target_phys_addr_t total_len;
588 total_len = sector_len * nb_blocs;
590 /* XXX: to be fixed */
592 if (total_len != (8 * 1024 * 1024) && total_len != (16 * 1024 * 1024) &&
593 total_len != (32 * 1024 * 1024) && total_len != (64 * 1024 * 1024))
597 pfl = qemu_mallocz(sizeof(pflash_t));
599 /* FIXME: Allocate ram ourselves. */
600 pfl->storage = qemu_get_ram_ptr(off);
602 pfl->fl_mem = cpu_register_io_memory(pflash_read_ops_be,
603 pflash_write_ops_be, pfl);
605 pfl->fl_mem = cpu_register_io_memory(pflash_read_ops_le,
606 pflash_write_ops_le, pfl);
609 cpu_register_physical_memory(base, total_len,
610 off | pfl->fl_mem | IO_MEM_ROMD);
614 /* read the initial flash content */
615 ret = bdrv_read(pfl->bs, 0, pfl->storage, total_len >> 9);
617 cpu_unregister_io_memory(pfl->fl_mem);
622 #if 0 /* XXX: there should be a bit to set up read-only,
623 * the same way the hardware does (with WP pin).
629 pfl->timer = qemu_new_timer(vm_clock, pflash_timer, pfl);
631 pfl->sector_len = sector_len;
632 pfl->total_len = total_len;
641 /* Hardcoded CFI table */
643 /* Standard "QRY" string */
644 pfl->cfi_table[0x10] = 'Q';
645 pfl->cfi_table[0x11] = 'R';
646 pfl->cfi_table[0x12] = 'Y';
647 /* Command set (Intel) */
648 pfl->cfi_table[0x13] = 0x01;
649 pfl->cfi_table[0x14] = 0x00;
650 /* Primary extended table address (none) */
651 pfl->cfi_table[0x15] = 0x31;
652 pfl->cfi_table[0x16] = 0x00;
653 /* Alternate command set (none) */
654 pfl->cfi_table[0x17] = 0x00;
655 pfl->cfi_table[0x18] = 0x00;
656 /* Alternate extended table (none) */
657 pfl->cfi_table[0x19] = 0x00;
658 pfl->cfi_table[0x1A] = 0x00;
660 pfl->cfi_table[0x1B] = 0x45;
662 pfl->cfi_table[0x1C] = 0x55;
663 /* Vpp min (no Vpp pin) */
664 pfl->cfi_table[0x1D] = 0x00;
665 /* Vpp max (no Vpp pin) */
666 pfl->cfi_table[0x1E] = 0x00;
668 pfl->cfi_table[0x1F] = 0x07;
669 /* Timeout for min size buffer write */
670 pfl->cfi_table[0x20] = 0x07;
671 /* Typical timeout for block erase */
672 pfl->cfi_table[0x21] = 0x0a;
673 /* Typical timeout for full chip erase (4096 ms) */
674 pfl->cfi_table[0x22] = 0x00;
676 pfl->cfi_table[0x23] = 0x04;
677 /* Max timeout for buffer write */
678 pfl->cfi_table[0x24] = 0x04;
679 /* Max timeout for block erase */
680 pfl->cfi_table[0x25] = 0x04;
681 /* Max timeout for chip erase */
682 pfl->cfi_table[0x26] = 0x00;
684 pfl->cfi_table[0x27] = ctz32(total_len); // + 1;
685 /* Flash device interface (8 & 16 bits) */
686 pfl->cfi_table[0x28] = 0x02;
687 pfl->cfi_table[0x29] = 0x00;
688 /* Max number of bytes in multi-bytes write */
690 pfl->cfi_table[0x2A] = 0x08;
692 pfl->cfi_table[0x2A] = 0x0B;
694 pfl->writeblock_size = 1 << pfl->cfi_table[0x2A];
696 pfl->cfi_table[0x2B] = 0x00;
697 /* Number of erase block regions (uniform) */
698 pfl->cfi_table[0x2C] = 0x01;
699 /* Erase block region 1 */
700 pfl->cfi_table[0x2D] = nb_blocs - 1;
701 pfl->cfi_table[0x2E] = (nb_blocs - 1) >> 8;
702 pfl->cfi_table[0x2F] = sector_len >> 8;
703 pfl->cfi_table[0x30] = sector_len >> 16;
706 pfl->cfi_table[0x31] = 'P';
707 pfl->cfi_table[0x32] = 'R';
708 pfl->cfi_table[0x33] = 'I';
710 pfl->cfi_table[0x34] = '1';
711 pfl->cfi_table[0x35] = '1';
713 pfl->cfi_table[0x36] = 0x00;
714 pfl->cfi_table[0x37] = 0x00;
715 pfl->cfi_table[0x38] = 0x00;
716 pfl->cfi_table[0x39] = 0x00;
718 pfl->cfi_table[0x3a] = 0x00;
720 pfl->cfi_table[0x3b] = 0x00;
721 pfl->cfi_table[0x3c] = 0x00;