652 lines
19 KiB
C
652 lines
19 KiB
C
/*
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* ST M25P80 emulator. Emulate all SPI flash devices based on the m25p80 command
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* set. Known devices table current as of Jun/2012 and taken from linux.
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* See drivers/mtd/devices/m25p80.c.
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*
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* Copyright (C) 2011 Edgar E. Iglesias <edgar.iglesias@gmail.com>
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* Copyright (C) 2012 Peter A. G. Crosthwaite <peter.crosthwaite@petalogix.com>
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* Copyright (C) 2012 PetaLogix
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 or
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* (at your option) a later version of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "hw.h"
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#include "sysemu/blockdev.h"
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#include "ssi.h"
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#include "devices.h"
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#ifdef M25P80_ERR_DEBUG
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#define DB_PRINT(...) do { \
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fprintf(stderr, ": %s: ", __func__); \
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fprintf(stderr, ## __VA_ARGS__); \
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} while (0);
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#else
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#define DB_PRINT(...)
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#endif
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/* Fields for FlashPartInfo->flags */
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/* erase capabilities */
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#define ER_4K 1
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#define ER_32K 2
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/* set to allow the page program command to write 0s back to 1. Useful for
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* modelling EEPROM with SPI flash command set
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*/
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#define WR_1 0x100
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typedef struct FlashPartInfo {
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const char *part_name;
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/* jedec code. (jedec >> 16) & 0xff is the 1st byte, >> 8 the 2nd etc */
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uint32_t jedec;
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/* extended jedec code */
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uint16_t ext_jedec;
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/* there is confusion between manufacturers as to what a sector is. In this
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* device model, a "sector" is the size that is erased by the ERASE_SECTOR
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* command (opcode 0xd8).
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*/
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uint32_t sector_size;
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uint32_t n_sectors;
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uint32_t page_size;
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uint8_t flags;
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} FlashPartInfo;
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/* adapted from linux */
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#define INFO(_part_name, _jedec, _ext_jedec, _sector_size, _n_sectors, _flags)\
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.part_name = (_part_name),\
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.jedec = (_jedec),\
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.ext_jedec = (_ext_jedec),\
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.sector_size = (_sector_size),\
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.n_sectors = (_n_sectors),\
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.page_size = 256,\
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.flags = (_flags),\
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#define JEDEC_NUMONYX 0x20
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#define JEDEC_WINBOND 0xEF
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#define JEDEC_SPANSION 0x01
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static const FlashPartInfo known_devices[] = {
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/* Atmel -- some are (confusingly) marketed as "DataFlash" */
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{ INFO("at25fs010", 0x1f6601, 0, 32 << 10, 4, ER_4K) },
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{ INFO("at25fs040", 0x1f6604, 0, 64 << 10, 8, ER_4K) },
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{ INFO("at25df041a", 0x1f4401, 0, 64 << 10, 8, ER_4K) },
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{ INFO("at25df321a", 0x1f4701, 0, 64 << 10, 64, ER_4K) },
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{ INFO("at25df641", 0x1f4800, 0, 64 << 10, 128, ER_4K) },
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{ INFO("at26f004", 0x1f0400, 0, 64 << 10, 8, ER_4K) },
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{ INFO("at26df081a", 0x1f4501, 0, 64 << 10, 16, ER_4K) },
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{ INFO("at26df161a", 0x1f4601, 0, 64 << 10, 32, ER_4K) },
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{ INFO("at26df321", 0x1f4700, 0, 64 << 10, 64, ER_4K) },
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/* EON -- en25xxx */
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{ INFO("en25f32", 0x1c3116, 0, 64 << 10, 64, ER_4K) },
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{ INFO("en25p32", 0x1c2016, 0, 64 << 10, 64, 0) },
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{ INFO("en25q32b", 0x1c3016, 0, 64 << 10, 64, 0) },
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{ INFO("en25p64", 0x1c2017, 0, 64 << 10, 128, 0) },
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/* Intel/Numonyx -- xxxs33b */
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{ INFO("160s33b", 0x898911, 0, 64 << 10, 32, 0) },
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{ INFO("320s33b", 0x898912, 0, 64 << 10, 64, 0) },
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{ INFO("640s33b", 0x898913, 0, 64 << 10, 128, 0) },
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/* Macronix */
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{ INFO("mx25l4005a", 0xc22013, 0, 64 << 10, 8, ER_4K) },
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{ INFO("mx25l8005", 0xc22014, 0, 64 << 10, 16, 0) },
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{ INFO("mx25l1606e", 0xc22015, 0, 64 << 10, 32, ER_4K) },
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{ INFO("mx25l3205d", 0xc22016, 0, 64 << 10, 64, 0) },
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{ INFO("mx25l6405d", 0xc22017, 0, 64 << 10, 128, 0) },
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{ INFO("mx25l12805d", 0xc22018, 0, 64 << 10, 256, 0) },
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{ INFO("mx25l12855e", 0xc22618, 0, 64 << 10, 256, 0) },
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{ INFO("mx25l25635e", 0xc22019, 0, 64 << 10, 512, 0) },
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{ INFO("mx25l25655e", 0xc22619, 0, 64 << 10, 512, 0) },
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/* Spansion -- single (large) sector size only, at least
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* for the chips listed here (without boot sectors).
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*/
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{ INFO("s25sl004a", 0x010212, 0, 64 << 10, 8, 0) },
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{ INFO("s25sl008a", 0x010213, 0, 64 << 10, 16, 0) },
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{ INFO("s25sl016a", 0x010214, 0, 64 << 10, 32, 0) },
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{ INFO("s25sl032a", 0x010215, 0, 64 << 10, 64, 0) },
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{ INFO("s25sl032p", 0x010215, 0x4d00, 64 << 10, 64, ER_4K) },
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{ INFO("s25sl064a", 0x010216, 0, 64 << 10, 128, 0) },
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{ INFO("s25fl256s0", 0x010219, 0x4d00, 256 << 10, 128, 0) },
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{ INFO("s25fl256s1", 0x010219, 0x4d01, 64 << 10, 512, 0) },
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{ INFO("s25fl512s", 0x010220, 0x4d00, 256 << 10, 256, 0) },
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{ INFO("s70fl01gs", 0x010221, 0x4d00, 256 << 10, 256, 0) },
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{ INFO("s25sl12800", 0x012018, 0x0300, 256 << 10, 64, 0) },
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{ INFO("s25sl12801", 0x012018, 0x0301, 64 << 10, 256, 0) },
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{ INFO("s25fl129p0", 0x012018, 0x4d00, 256 << 10, 64, 0) },
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{ INFO("s25fl129p1", 0x012018, 0x4d01, 64 << 10, 256, 0) },
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{ INFO("s25fl016k", 0xef4015, 0, 64 << 10, 32, ER_4K | ER_32K) },
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{ INFO("s25fl064k", 0xef4017, 0, 64 << 10, 128, ER_4K | ER_32K) },
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/* SST -- large erase sizes are "overlays", "sectors" are 4<< 10 */
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{ INFO("sst25vf040b", 0xbf258d, 0, 64 << 10, 8, ER_4K) },
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{ INFO("sst25vf080b", 0xbf258e, 0, 64 << 10, 16, ER_4K) },
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{ INFO("sst25vf016b", 0xbf2541, 0, 64 << 10, 32, ER_4K) },
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{ INFO("sst25vf032b", 0xbf254a, 0, 64 << 10, 64, ER_4K) },
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{ INFO("sst25wf512", 0xbf2501, 0, 64 << 10, 1, ER_4K) },
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{ INFO("sst25wf010", 0xbf2502, 0, 64 << 10, 2, ER_4K) },
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{ INFO("sst25wf020", 0xbf2503, 0, 64 << 10, 4, ER_4K) },
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{ INFO("sst25wf040", 0xbf2504, 0, 64 << 10, 8, ER_4K) },
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/* ST Microelectronics -- newer production may have feature updates */
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{ INFO("m25p05", 0x202010, 0, 32 << 10, 2, 0) },
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{ INFO("m25p10", 0x202011, 0, 32 << 10, 4, 0) },
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{ INFO("m25p20", 0x202012, 0, 64 << 10, 4, 0) },
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{ INFO("m25p40", 0x202013, 0, 64 << 10, 8, 0) },
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{ INFO("m25p80", 0x202014, 0, 64 << 10, 16, 0) },
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{ INFO("m25p16", 0x202015, 0, 64 << 10, 32, 0) },
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{ INFO("m25p32", 0x202016, 0, 64 << 10, 64, 0) },
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{ INFO("m25p64", 0x202017, 0, 64 << 10, 128, 0) },
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{ INFO("m25p128", 0x202018, 0, 256 << 10, 64, 0) },
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{ INFO("m45pe10", 0x204011, 0, 64 << 10, 2, 0) },
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{ INFO("m45pe80", 0x204014, 0, 64 << 10, 16, 0) },
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{ INFO("m45pe16", 0x204015, 0, 64 << 10, 32, 0) },
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{ INFO("m25pe80", 0x208014, 0, 64 << 10, 16, 0) },
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{ INFO("m25pe16", 0x208015, 0, 64 << 10, 32, ER_4K) },
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{ INFO("m25px32", 0x207116, 0, 64 << 10, 64, ER_4K) },
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{ INFO("m25px32-s0", 0x207316, 0, 64 << 10, 64, ER_4K) },
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{ INFO("m25px32-s1", 0x206316, 0, 64 << 10, 64, ER_4K) },
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{ INFO("m25px64", 0x207117, 0, 64 << 10, 128, 0) },
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/* Winbond -- w25x "blocks" are 64k, "sectors" are 4KiB */
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{ INFO("w25x10", 0xef3011, 0, 64 << 10, 2, ER_4K) },
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{ INFO("w25x20", 0xef3012, 0, 64 << 10, 4, ER_4K) },
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{ INFO("w25x40", 0xef3013, 0, 64 << 10, 8, ER_4K) },
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{ INFO("w25x80", 0xef3014, 0, 64 << 10, 16, ER_4K) },
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{ INFO("w25x16", 0xef3015, 0, 64 << 10, 32, ER_4K) },
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{ INFO("w25x32", 0xef3016, 0, 64 << 10, 64, ER_4K) },
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{ INFO("w25q32", 0xef4016, 0, 64 << 10, 64, ER_4K) },
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{ INFO("w25x64", 0xef3017, 0, 64 << 10, 128, ER_4K) },
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{ INFO("w25q64", 0xef4017, 0, 64 << 10, 128, ER_4K) },
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/* Numonyx -- n25q128 */
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{ INFO("n25q128", 0x20ba18, 0, 64 << 10, 256, 0) },
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{ },
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};
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typedef enum {
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NOP = 0,
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WRDI = 0x4,
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RDSR = 0x5,
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WREN = 0x6,
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JEDEC_READ = 0x9f,
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BULK_ERASE = 0xc7,
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READ = 0x3,
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FAST_READ = 0xb,
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DOR = 0x3b,
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QOR = 0x6b,
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DIOR = 0xbb,
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QIOR = 0xeb,
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PP = 0x2,
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DPP = 0xa2,
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QPP = 0x32,
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ERASE_4K = 0x20,
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ERASE_32K = 0x52,
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ERASE_SECTOR = 0xd8,
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} FlashCMD;
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typedef enum {
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STATE_IDLE,
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STATE_PAGE_PROGRAM,
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STATE_READ,
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STATE_COLLECTING_DATA,
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STATE_READING_DATA,
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} CMDState;
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typedef struct Flash {
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SSISlave ssidev;
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uint32_t r;
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BlockDriverState *bdrv;
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uint8_t *storage;
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uint32_t size;
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int page_size;
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uint8_t state;
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uint8_t data[16];
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uint32_t len;
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uint32_t pos;
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uint8_t needed_bytes;
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uint8_t cmd_in_progress;
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uint64_t cur_addr;
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bool write_enable;
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int64_t dirty_page;
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char *part_name;
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const FlashPartInfo *pi;
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} Flash;
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static void bdrv_sync_complete(void *opaque, int ret)
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{
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/* do nothing. Masters do not directly interact with the backing store,
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* only the working copy so no mutexing required.
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*/
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}
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static void flash_sync_page(Flash *s, int page)
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{
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if (s->bdrv) {
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int bdrv_sector, nb_sectors;
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QEMUIOVector iov;
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bdrv_sector = (page * s->pi->page_size) / BDRV_SECTOR_SIZE;
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nb_sectors = DIV_ROUND_UP(s->pi->page_size, BDRV_SECTOR_SIZE);
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qemu_iovec_init(&iov, 1);
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qemu_iovec_add(&iov, s->storage + bdrv_sector * BDRV_SECTOR_SIZE,
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nb_sectors * BDRV_SECTOR_SIZE);
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bdrv_aio_writev(s->bdrv, bdrv_sector, &iov, nb_sectors,
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bdrv_sync_complete, NULL);
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}
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}
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static inline void flash_sync_area(Flash *s, int64_t off, int64_t len)
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{
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int64_t start, end, nb_sectors;
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QEMUIOVector iov;
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if (!s->bdrv) {
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return;
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}
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assert(!(len % BDRV_SECTOR_SIZE));
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start = off / BDRV_SECTOR_SIZE;
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end = (off + len) / BDRV_SECTOR_SIZE;
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nb_sectors = end - start;
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qemu_iovec_init(&iov, 1);
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qemu_iovec_add(&iov, s->storage + (start * BDRV_SECTOR_SIZE),
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nb_sectors * BDRV_SECTOR_SIZE);
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bdrv_aio_writev(s->bdrv, start, &iov, nb_sectors, bdrv_sync_complete, NULL);
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}
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static void flash_erase(Flash *s, int offset, FlashCMD cmd)
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{
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uint32_t len;
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uint8_t capa_to_assert = 0;
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switch (cmd) {
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case ERASE_4K:
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len = 4 << 10;
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capa_to_assert = ER_4K;
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break;
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case ERASE_32K:
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len = 32 << 10;
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capa_to_assert = ER_32K;
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break;
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case ERASE_SECTOR:
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len = s->pi->sector_size;
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break;
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case BULK_ERASE:
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len = s->size;
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break;
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default:
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abort();
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}
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DB_PRINT("offset = %#x, len = %d\n", offset, len);
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if ((s->pi->flags & capa_to_assert) != capa_to_assert) {
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hw_error("m25p80: %dk erase size not supported by device\n", len);
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}
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if (!s->write_enable) {
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DB_PRINT("erase with write protect!\n");
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return;
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}
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memset(s->storage + offset, 0xff, len);
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flash_sync_area(s, offset, len);
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}
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static inline void flash_sync_dirty(Flash *s, int64_t newpage)
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{
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if (s->dirty_page >= 0 && s->dirty_page != newpage) {
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flash_sync_page(s, s->dirty_page);
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s->dirty_page = newpage;
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}
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}
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static inline
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void flash_write8(Flash *s, uint64_t addr, uint8_t data)
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{
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int64_t page = addr / s->pi->page_size;
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uint8_t prev = s->storage[s->cur_addr];
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if (!s->write_enable) {
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DB_PRINT("write with write protect!\n");
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}
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if ((prev ^ data) & data) {
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DB_PRINT("programming zero to one! addr=%lx %x -> %x\n",
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addr, prev, data);
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}
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if (s->pi->flags & WR_1) {
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s->storage[s->cur_addr] = data;
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} else {
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s->storage[s->cur_addr] &= data;
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}
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flash_sync_dirty(s, page);
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s->dirty_page = page;
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}
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static void complete_collecting_data(Flash *s)
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{
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s->cur_addr = s->data[0] << 16;
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s->cur_addr |= s->data[1] << 8;
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s->cur_addr |= s->data[2];
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switch (s->cmd_in_progress) {
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case DPP:
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case QPP:
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case PP:
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s->state = STATE_PAGE_PROGRAM;
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break;
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case READ:
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case FAST_READ:
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case DOR:
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case QOR:
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case DIOR:
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case QIOR:
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s->state = STATE_READ;
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break;
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case ERASE_4K:
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case ERASE_32K:
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case ERASE_SECTOR:
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flash_erase(s, s->cur_addr, s->cmd_in_progress);
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break;
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default:
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break;
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}
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}
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static void decode_new_cmd(Flash *s, uint32_t value)
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{
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s->cmd_in_progress = value;
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DB_PRINT("decoded new command:%x\n", value);
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switch (value) {
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case ERASE_4K:
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case ERASE_32K:
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case ERASE_SECTOR:
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case READ:
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case DPP:
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case QPP:
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case PP:
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s->needed_bytes = 3;
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s->pos = 0;
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s->len = 0;
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s->state = STATE_COLLECTING_DATA;
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break;
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case FAST_READ:
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case DOR:
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case QOR:
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s->needed_bytes = 4;
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s->pos = 0;
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s->len = 0;
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s->state = STATE_COLLECTING_DATA;
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break;
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case DIOR:
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switch ((s->pi->jedec >> 16) & 0xFF) {
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case JEDEC_WINBOND:
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case JEDEC_SPANSION:
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s->needed_bytes = 4;
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break;
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case JEDEC_NUMONYX:
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default:
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s->needed_bytes = 5;
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}
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s->pos = 0;
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s->len = 0;
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s->state = STATE_COLLECTING_DATA;
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break;
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case QIOR:
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switch ((s->pi->jedec >> 16) & 0xFF) {
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case JEDEC_WINBOND:
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case JEDEC_SPANSION:
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s->needed_bytes = 6;
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break;
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case JEDEC_NUMONYX:
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default:
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s->needed_bytes = 8;
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}
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s->pos = 0;
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s->len = 0;
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s->state = STATE_COLLECTING_DATA;
|
|
break;
|
|
|
|
case WRDI:
|
|
s->write_enable = false;
|
|
break;
|
|
case WREN:
|
|
s->write_enable = true;
|
|
break;
|
|
|
|
case RDSR:
|
|
s->data[0] = (!!s->write_enable) << 1;
|
|
s->pos = 0;
|
|
s->len = 1;
|
|
s->state = STATE_READING_DATA;
|
|
break;
|
|
|
|
case JEDEC_READ:
|
|
DB_PRINT("populated jedec code\n");
|
|
s->data[0] = (s->pi->jedec >> 16) & 0xff;
|
|
s->data[1] = (s->pi->jedec >> 8) & 0xff;
|
|
s->data[2] = s->pi->jedec & 0xff;
|
|
if (s->pi->ext_jedec) {
|
|
s->data[3] = (s->pi->ext_jedec >> 8) & 0xff;
|
|
s->data[4] = s->pi->ext_jedec & 0xff;
|
|
s->len = 5;
|
|
} else {
|
|
s->len = 3;
|
|
}
|
|
s->pos = 0;
|
|
s->state = STATE_READING_DATA;
|
|
break;
|
|
|
|
case BULK_ERASE:
|
|
if (s->write_enable) {
|
|
DB_PRINT("chip erase\n");
|
|
flash_erase(s, 0, BULK_ERASE);
|
|
} else {
|
|
DB_PRINT("chip erase with write protect!\n");
|
|
}
|
|
break;
|
|
case NOP:
|
|
break;
|
|
default:
|
|
DB_PRINT("Unknown cmd %x\n", value);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static int m25p80_cs(SSISlave *ss, bool select)
|
|
{
|
|
Flash *s = FROM_SSI_SLAVE(Flash, ss);
|
|
|
|
if (select) {
|
|
s->len = 0;
|
|
s->pos = 0;
|
|
s->state = STATE_IDLE;
|
|
flash_sync_dirty(s, -1);
|
|
}
|
|
|
|
DB_PRINT("%sselect\n", select ? "de" : "");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static uint32_t m25p80_transfer8(SSISlave *ss, uint32_t tx)
|
|
{
|
|
Flash *s = FROM_SSI_SLAVE(Flash, ss);
|
|
uint32_t r = 0;
|
|
|
|
switch (s->state) {
|
|
|
|
case STATE_PAGE_PROGRAM:
|
|
DB_PRINT("page program cur_addr=%lx data=%x\n", s->cur_addr,
|
|
(uint8_t)tx);
|
|
flash_write8(s, s->cur_addr, (uint8_t)tx);
|
|
s->cur_addr++;
|
|
break;
|
|
|
|
case STATE_READ:
|
|
r = s->storage[s->cur_addr];
|
|
DB_PRINT("READ 0x%lx=%x\n", s->cur_addr, r);
|
|
s->cur_addr = (s->cur_addr + 1) % s->size;
|
|
break;
|
|
|
|
case STATE_COLLECTING_DATA:
|
|
s->data[s->len] = (uint8_t)tx;
|
|
s->len++;
|
|
|
|
if (s->len == s->needed_bytes) {
|
|
complete_collecting_data(s);
|
|
}
|
|
break;
|
|
|
|
case STATE_READING_DATA:
|
|
r = s->data[s->pos];
|
|
s->pos++;
|
|
if (s->pos == s->len) {
|
|
s->pos = 0;
|
|
s->state = STATE_IDLE;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
case STATE_IDLE:
|
|
decode_new_cmd(s, (uint8_t)tx);
|
|
break;
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
static int m25p80_init(SSISlave *ss)
|
|
{
|
|
DriveInfo *dinfo;
|
|
Flash *s = FROM_SSI_SLAVE(Flash, ss);
|
|
const FlashPartInfo *i;
|
|
|
|
if (!s->part_name) { /* default to actual m25p80 if no partname given */
|
|
s->part_name = (char *)"m25p80";
|
|
}
|
|
|
|
i = known_devices;
|
|
for (i = known_devices;; i++) {
|
|
assert(i);
|
|
if (!i->part_name) {
|
|
fprintf(stderr, "Unknown SPI flash part: \"%s\"\n", s->part_name);
|
|
return 1;
|
|
} else if (!strcmp(i->part_name, s->part_name)) {
|
|
s->pi = i;
|
|
break;
|
|
}
|
|
}
|
|
|
|
s->size = s->pi->sector_size * s->pi->n_sectors;
|
|
s->dirty_page = -1;
|
|
s->storage = qemu_blockalign(s->bdrv, s->size);
|
|
|
|
dinfo = drive_get_next(IF_MTD);
|
|
|
|
if (dinfo && dinfo->bdrv) {
|
|
DB_PRINT("Binding to IF_MTD drive\n");
|
|
s->bdrv = dinfo->bdrv;
|
|
/* FIXME: Move to late init */
|
|
if (bdrv_read(s->bdrv, 0, s->storage, DIV_ROUND_UP(s->size,
|
|
BDRV_SECTOR_SIZE))) {
|
|
fprintf(stderr, "Failed to initialize SPI flash!\n");
|
|
return 1;
|
|
}
|
|
} else {
|
|
memset(s->storage, 0xFF, s->size);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void m25p80_pre_save(void *opaque)
|
|
{
|
|
flash_sync_dirty((Flash *)opaque, -1);
|
|
}
|
|
|
|
static const VMStateDescription vmstate_m25p80 = {
|
|
.name = "xilinx_spi",
|
|
.version_id = 1,
|
|
.minimum_version_id = 1,
|
|
.minimum_version_id_old = 1,
|
|
.pre_save = m25p80_pre_save,
|
|
.fields = (VMStateField[]) {
|
|
VMSTATE_UINT8(state, Flash),
|
|
VMSTATE_UINT8_ARRAY(data, Flash, 16),
|
|
VMSTATE_UINT32(len, Flash),
|
|
VMSTATE_UINT32(pos, Flash),
|
|
VMSTATE_UINT8(needed_bytes, Flash),
|
|
VMSTATE_UINT8(cmd_in_progress, Flash),
|
|
VMSTATE_UINT64(cur_addr, Flash),
|
|
VMSTATE_BOOL(write_enable, Flash),
|
|
VMSTATE_END_OF_LIST()
|
|
}
|
|
};
|
|
|
|
static Property m25p80_properties[] = {
|
|
DEFINE_PROP_STRING("partname", Flash, part_name),
|
|
DEFINE_PROP_END_OF_LIST(),
|
|
};
|
|
|
|
static void m25p80_class_init(ObjectClass *klass, void *data)
|
|
{
|
|
DeviceClass *dc = DEVICE_CLASS(klass);
|
|
SSISlaveClass *k = SSI_SLAVE_CLASS(klass);
|
|
|
|
k->init = m25p80_init;
|
|
k->transfer = m25p80_transfer8;
|
|
k->set_cs = m25p80_cs;
|
|
k->cs_polarity = SSI_CS_LOW;
|
|
dc->props = m25p80_properties;
|
|
dc->vmsd = &vmstate_m25p80;
|
|
}
|
|
|
|
static const TypeInfo m25p80_info = {
|
|
.name = "m25p80",
|
|
.parent = TYPE_SSI_SLAVE,
|
|
.instance_size = sizeof(Flash),
|
|
.class_init = m25p80_class_init,
|
|
};
|
|
|
|
static void m25p80_register_types(void)
|
|
{
|
|
type_register_static(&m25p80_info);
|
|
}
|
|
|
|
type_init(m25p80_register_types)
|