| /* |
| * ST M25P80 emulator. Emulate all SPI flash devices based on the m25p80 command |
| * set. Known devices table current as of Jun/2012 and taken from linux. |
| * See drivers/mtd/devices/m25p80.c. |
| * |
| * Copyright (C) 2011 Edgar E. Iglesias <edgar.iglesias@gmail.com> |
| * Copyright (C) 2012 Peter A. G. Crosthwaite <peter.crosthwaite@petalogix.com> |
| * Copyright (C) 2012 PetaLogix |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License as |
| * published by the Free Software Foundation; either version 2 or |
| * (at your option) a later version of the License. |
| * |
| * 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, see <http://www.gnu.org/licenses/>. |
| */ |
| |
| #include "hw/hw.h" |
| #include "sysemu/blockdev.h" |
| #include "hw/ssi.h" |
| |
| #ifndef M25P80_ERR_DEBUG |
| #define M25P80_ERR_DEBUG 0 |
| #endif |
| |
| #define DB_PRINT_L(level, ...) do { \ |
| if (M25P80_ERR_DEBUG > (level)) { \ |
| fprintf(stderr, ": %s: ", __func__); \ |
| fprintf(stderr, ## __VA_ARGS__); \ |
| } \ |
| } while (0); |
| |
| /* Fields for FlashPartInfo->flags */ |
| |
| /* erase capabilities */ |
| #define ER_4K 1 |
| #define ER_32K 2 |
| /* set to allow the page program command to write 0s back to 1. Useful for |
| * modelling EEPROM with SPI flash command set |
| */ |
| #define WR_1 0x100 |
| |
| typedef struct FlashPartInfo { |
| const char *part_name; |
| /* jedec code. (jedec >> 16) & 0xff is the 1st byte, >> 8 the 2nd etc */ |
| uint32_t jedec; |
| /* extended jedec code */ |
| uint16_t ext_jedec; |
| /* there is confusion between manufacturers as to what a sector is. In this |
| * device model, a "sector" is the size that is erased by the ERASE_SECTOR |
| * command (opcode 0xd8). |
| */ |
| uint32_t sector_size; |
| uint32_t n_sectors; |
| uint32_t page_size; |
| uint8_t flags; |
| } FlashPartInfo; |
| |
| /* adapted from linux */ |
| |
| #define INFO(_part_name, _jedec, _ext_jedec, _sector_size, _n_sectors, _flags)\ |
| .part_name = (_part_name),\ |
| .jedec = (_jedec),\ |
| .ext_jedec = (_ext_jedec),\ |
| .sector_size = (_sector_size),\ |
| .n_sectors = (_n_sectors),\ |
| .page_size = 256,\ |
| .flags = (_flags),\ |
| |
| #define JEDEC_NUMONYX 0x20 |
| #define JEDEC_WINBOND 0xEF |
| #define JEDEC_SPANSION 0x01 |
| |
| static const FlashPartInfo known_devices[] = { |
| /* Atmel -- some are (confusingly) marketed as "DataFlash" */ |
| { INFO("at25fs010", 0x1f6601, 0, 32 << 10, 4, ER_4K) }, |
| { INFO("at25fs040", 0x1f6604, 0, 64 << 10, 8, ER_4K) }, |
| |
| { INFO("at25df041a", 0x1f4401, 0, 64 << 10, 8, ER_4K) }, |
| { INFO("at25df321a", 0x1f4701, 0, 64 << 10, 64, ER_4K) }, |
| { INFO("at25df641", 0x1f4800, 0, 64 << 10, 128, ER_4K) }, |
| |
| { INFO("at26f004", 0x1f0400, 0, 64 << 10, 8, ER_4K) }, |
| { INFO("at26df081a", 0x1f4501, 0, 64 << 10, 16, ER_4K) }, |
| { INFO("at26df161a", 0x1f4601, 0, 64 << 10, 32, ER_4K) }, |
| { INFO("at26df321", 0x1f4700, 0, 64 << 10, 64, ER_4K) }, |
| |
| { INFO("at45db081d", 0x1f2500, 0, 64 << 10, 16, ER_4K) }, |
| |
| /* EON -- en25xxx */ |
| { INFO("en25f32", 0x1c3116, 0, 64 << 10, 64, ER_4K) }, |
| { INFO("en25p32", 0x1c2016, 0, 64 << 10, 64, 0) }, |
| { INFO("en25q32b", 0x1c3016, 0, 64 << 10, 64, 0) }, |
| { INFO("en25p64", 0x1c2017, 0, 64 << 10, 128, 0) }, |
| { INFO("en25q64", 0x1c3017, 0, 64 << 10, 128, ER_4K) }, |
| |
| /* GigaDevice */ |
| { INFO("gd25q32", 0xc84016, 0, 64 << 10, 64, ER_4K) }, |
| { INFO("gd25q64", 0xc84017, 0, 64 << 10, 128, ER_4K) }, |
| |
| /* Intel/Numonyx -- xxxs33b */ |
| { INFO("160s33b", 0x898911, 0, 64 << 10, 32, 0) }, |
| { INFO("320s33b", 0x898912, 0, 64 << 10, 64, 0) }, |
| { INFO("640s33b", 0x898913, 0, 64 << 10, 128, 0) }, |
| { INFO("n25q064", 0x20ba17, 0, 64 << 10, 128, 0) }, |
| |
| /* Macronix */ |
| { INFO("mx25l2005a", 0xc22012, 0, 64 << 10, 4, ER_4K) }, |
| { INFO("mx25l4005a", 0xc22013, 0, 64 << 10, 8, ER_4K) }, |
| { INFO("mx25l8005", 0xc22014, 0, 64 << 10, 16, 0) }, |
| { INFO("mx25l1606e", 0xc22015, 0, 64 << 10, 32, ER_4K) }, |
| { INFO("mx25l3205d", 0xc22016, 0, 64 << 10, 64, 0) }, |
| { INFO("mx25l6405d", 0xc22017, 0, 64 << 10, 128, 0) }, |
| { INFO("mx25l12805d", 0xc22018, 0, 64 << 10, 256, 0) }, |
| { INFO("mx25l12855e", 0xc22618, 0, 64 << 10, 256, 0) }, |
| { INFO("mx25l25635e", 0xc22019, 0, 64 << 10, 512, 0) }, |
| { INFO("mx25l25655e", 0xc22619, 0, 64 << 10, 512, 0) }, |
| |
| /* Micron */ |
| { INFO("n25q128a11", 0x20bb18, 0, 64 << 10, 256, 0) }, |
| { INFO("n25q128a13", 0x20ba18, 0, 64 << 10, 256, 0) }, |
| { INFO("n25q256a", 0x20ba19, 0, 64 << 10, 512, ER_4K) }, |
| |
| /* Spansion -- single (large) sector size only, at least |
| * for the chips listed here (without boot sectors). |
| */ |
| { INFO("s25sl032p", 0x010215, 0x4d00, 64 << 10, 64, ER_4K) }, |
| { INFO("s25sl064p", 0x010216, 0x4d00, 64 << 10, 128, ER_4K) }, |
| { INFO("s25fl256s0", 0x010219, 0x4d00, 256 << 10, 128, 0) }, |
| { INFO("s25fl256s1", 0x010219, 0x4d01, 64 << 10, 512, 0) }, |
| { INFO("s25fl512s", 0x010220, 0x4d00, 256 << 10, 256, 0) }, |
| { INFO("s70fl01gs", 0x010221, 0x4d00, 256 << 10, 256, 0) }, |
| { INFO("s25sl12800", 0x012018, 0x0300, 256 << 10, 64, 0) }, |
| { INFO("s25sl12801", 0x012018, 0x0301, 64 << 10, 256, 0) }, |
| { INFO("s25fl129p0", 0x012018, 0x4d00, 256 << 10, 64, 0) }, |
| { INFO("s25fl129p1", 0x012018, 0x4d01, 64 << 10, 256, 0) }, |
| { INFO("s25sl004a", 0x010212, 0, 64 << 10, 8, 0) }, |
| { INFO("s25sl008a", 0x010213, 0, 64 << 10, 16, 0) }, |
| { INFO("s25sl016a", 0x010214, 0, 64 << 10, 32, 0) }, |
| { INFO("s25sl032a", 0x010215, 0, 64 << 10, 64, 0) }, |
| { INFO("s25sl064a", 0x010216, 0, 64 << 10, 128, 0) }, |
| { INFO("s25fl016k", 0xef4015, 0, 64 << 10, 32, ER_4K | ER_32K) }, |
| { INFO("s25fl064k", 0xef4017, 0, 64 << 10, 128, ER_4K | ER_32K) }, |
| |
| /* SST -- large erase sizes are "overlays", "sectors" are 4<< 10 */ |
| { INFO("sst25vf040b", 0xbf258d, 0, 64 << 10, 8, ER_4K) }, |
| { INFO("sst25vf080b", 0xbf258e, 0, 64 << 10, 16, ER_4K) }, |
| { INFO("sst25vf016b", 0xbf2541, 0, 64 << 10, 32, ER_4K) }, |
| { INFO("sst25vf032b", 0xbf254a, 0, 64 << 10, 64, ER_4K) }, |
| { INFO("sst25wf512", 0xbf2501, 0, 64 << 10, 1, ER_4K) }, |
| { INFO("sst25wf010", 0xbf2502, 0, 64 << 10, 2, ER_4K) }, |
| { INFO("sst25wf020", 0xbf2503, 0, 64 << 10, 4, ER_4K) }, |
| { INFO("sst25wf040", 0xbf2504, 0, 64 << 10, 8, ER_4K) }, |
| |
| /* ST Microelectronics -- newer production may have feature updates */ |
| { INFO("m25p05", 0x202010, 0, 32 << 10, 2, 0) }, |
| { INFO("m25p10", 0x202011, 0, 32 << 10, 4, 0) }, |
| { INFO("m25p20", 0x202012, 0, 64 << 10, 4, 0) }, |
| { INFO("m25p40", 0x202013, 0, 64 << 10, 8, 0) }, |
| { INFO("m25p80", 0x202014, 0, 64 << 10, 16, 0) }, |
| { INFO("m25p16", 0x202015, 0, 64 << 10, 32, 0) }, |
| { INFO("m25p32", 0x202016, 0, 64 << 10, 64, 0) }, |
| { INFO("m25p64", 0x202017, 0, 64 << 10, 128, 0) }, |
| { INFO("m25p128", 0x202018, 0, 256 << 10, 64, 0) }, |
| { INFO("n25q032", 0x20ba16, 0, 64 << 10, 64, 0) }, |
| |
| { INFO("m45pe10", 0x204011, 0, 64 << 10, 2, 0) }, |
| { INFO("m45pe80", 0x204014, 0, 64 << 10, 16, 0) }, |
| { INFO("m45pe16", 0x204015, 0, 64 << 10, 32, 0) }, |
| |
| { INFO("m25pe20", 0x208012, 0, 64 << 10, 4, 0) }, |
| { INFO("m25pe80", 0x208014, 0, 64 << 10, 16, 0) }, |
| { INFO("m25pe16", 0x208015, 0, 64 << 10, 32, ER_4K) }, |
| |
| { INFO("m25px32", 0x207116, 0, 64 << 10, 64, ER_4K) }, |
| { INFO("m25px32-s0", 0x207316, 0, 64 << 10, 64, ER_4K) }, |
| { INFO("m25px32-s1", 0x206316, 0, 64 << 10, 64, ER_4K) }, |
| { INFO("m25px64", 0x207117, 0, 64 << 10, 128, 0) }, |
| |
| /* Winbond -- w25x "blocks" are 64k, "sectors" are 4KiB */ |
| { INFO("w25x10", 0xef3011, 0, 64 << 10, 2, ER_4K) }, |
| { INFO("w25x20", 0xef3012, 0, 64 << 10, 4, ER_4K) }, |
| { INFO("w25x40", 0xef3013, 0, 64 << 10, 8, ER_4K) }, |
| { INFO("w25x80", 0xef3014, 0, 64 << 10, 16, ER_4K) }, |
| { INFO("w25x16", 0xef3015, 0, 64 << 10, 32, ER_4K) }, |
| { INFO("w25x32", 0xef3016, 0, 64 << 10, 64, ER_4K) }, |
| { INFO("w25q32", 0xef4016, 0, 64 << 10, 64, ER_4K) }, |
| { INFO("w25q32dw", 0xef6016, 0, 64 << 10, 64, ER_4K) }, |
| { INFO("w25x64", 0xef3017, 0, 64 << 10, 128, ER_4K) }, |
| { INFO("w25q64", 0xef4017, 0, 64 << 10, 128, ER_4K) }, |
| { INFO("w25q80", 0xef5014, 0, 64 << 10, 16, ER_4K) }, |
| { INFO("w25q80bl", 0xef4014, 0, 64 << 10, 16, ER_4K) }, |
| { INFO("w25q256", 0xef4019, 0, 64 << 10, 512, ER_4K) }, |
| |
| /* Numonyx -- n25q128 */ |
| { INFO("n25q128", 0x20ba18, 0, 64 << 10, 256, 0) }, |
| }; |
| |
| typedef enum { |
| NOP = 0, |
| WRSR = 0x1, |
| WRDI = 0x4, |
| RDSR = 0x5, |
| WREN = 0x6, |
| JEDEC_READ = 0x9f, |
| BULK_ERASE = 0xc7, |
| |
| READ = 0x3, |
| FAST_READ = 0xb, |
| DOR = 0x3b, |
| QOR = 0x6b, |
| DIOR = 0xbb, |
| QIOR = 0xeb, |
| |
| PP = 0x2, |
| DPP = 0xa2, |
| QPP = 0x32, |
| |
| ERASE_4K = 0x20, |
| ERASE_32K = 0x52, |
| ERASE_SECTOR = 0xd8, |
| } FlashCMD; |
| |
| typedef enum { |
| STATE_IDLE, |
| STATE_PAGE_PROGRAM, |
| STATE_READ, |
| STATE_COLLECTING_DATA, |
| STATE_READING_DATA, |
| } CMDState; |
| |
| typedef struct Flash { |
| SSISlave ssidev; |
| uint32_t r; |
| |
| BlockDriverState *bdrv; |
| |
| uint8_t *storage; |
| uint32_t size; |
| int page_size; |
| |
| uint8_t state; |
| uint8_t data[16]; |
| uint32_t len; |
| uint32_t pos; |
| uint8_t needed_bytes; |
| uint8_t cmd_in_progress; |
| uint64_t cur_addr; |
| bool write_enable; |
| |
| int64_t dirty_page; |
| |
| const FlashPartInfo *pi; |
| |
| } Flash; |
| |
| typedef struct M25P80Class { |
| SSISlaveClass parent_class; |
| FlashPartInfo *pi; |
| } M25P80Class; |
| |
| #define TYPE_M25P80 "m25p80-generic" |
| #define M25P80(obj) \ |
| OBJECT_CHECK(Flash, (obj), TYPE_M25P80) |
| #define M25P80_CLASS(klass) \ |
| OBJECT_CLASS_CHECK(M25P80Class, (klass), TYPE_M25P80) |
| #define M25P80_GET_CLASS(obj) \ |
| OBJECT_GET_CLASS(M25P80Class, (obj), TYPE_M25P80) |
| |
| static void bdrv_sync_complete(void *opaque, int ret) |
| { |
| /* do nothing. Masters do not directly interact with the backing store, |
| * only the working copy so no mutexing required. |
| */ |
| } |
| |
| static void flash_sync_page(Flash *s, int page) |
| { |
| if (s->bdrv) { |
| int bdrv_sector, nb_sectors; |
| QEMUIOVector iov; |
| |
| bdrv_sector = (page * s->pi->page_size) / BDRV_SECTOR_SIZE; |
| nb_sectors = DIV_ROUND_UP(s->pi->page_size, BDRV_SECTOR_SIZE); |
| qemu_iovec_init(&iov, 1); |
| qemu_iovec_add(&iov, s->storage + bdrv_sector * BDRV_SECTOR_SIZE, |
| nb_sectors * BDRV_SECTOR_SIZE); |
| bdrv_aio_writev(s->bdrv, bdrv_sector, &iov, nb_sectors, |
| bdrv_sync_complete, NULL); |
| } |
| } |
| |
| static inline void flash_sync_area(Flash *s, int64_t off, int64_t len) |
| { |
| int64_t start, end, nb_sectors; |
| QEMUIOVector iov; |
| |
| if (!s->bdrv) { |
| return; |
| } |
| |
| assert(!(len % BDRV_SECTOR_SIZE)); |
| start = off / BDRV_SECTOR_SIZE; |
| end = (off + len) / BDRV_SECTOR_SIZE; |
| nb_sectors = end - start; |
| qemu_iovec_init(&iov, 1); |
| qemu_iovec_add(&iov, s->storage + (start * BDRV_SECTOR_SIZE), |
| nb_sectors * BDRV_SECTOR_SIZE); |
| bdrv_aio_writev(s->bdrv, start, &iov, nb_sectors, bdrv_sync_complete, NULL); |
| } |
| |
| static void flash_erase(Flash *s, int offset, FlashCMD cmd) |
| { |
| uint32_t len; |
| uint8_t capa_to_assert = 0; |
| |
| switch (cmd) { |
| case ERASE_4K: |
| len = 4 << 10; |
| capa_to_assert = ER_4K; |
| break; |
| case ERASE_32K: |
| len = 32 << 10; |
| capa_to_assert = ER_32K; |
| break; |
| case ERASE_SECTOR: |
| len = s->pi->sector_size; |
| break; |
| case BULK_ERASE: |
| len = s->size; |
| break; |
| default: |
| abort(); |
| } |
| |
| DB_PRINT_L(0, "offset = %#x, len = %d\n", offset, len); |
| if ((s->pi->flags & capa_to_assert) != capa_to_assert) { |
| qemu_log_mask(LOG_GUEST_ERROR, "M25P80: %d erase size not supported by" |
| " device\n", len); |
| } |
| |
| if (!s->write_enable) { |
| qemu_log_mask(LOG_GUEST_ERROR, "M25P80: erase with write protect!\n"); |
| return; |
| } |
| memset(s->storage + offset, 0xff, len); |
| flash_sync_area(s, offset, len); |
| } |
| |
| static inline void flash_sync_dirty(Flash *s, int64_t newpage) |
| { |
| if (s->dirty_page >= 0 && s->dirty_page != newpage) { |
| flash_sync_page(s, s->dirty_page); |
| s->dirty_page = newpage; |
| } |
| } |
| |
| static inline |
| void flash_write8(Flash *s, uint64_t addr, uint8_t data) |
| { |
| int64_t page = addr / s->pi->page_size; |
| uint8_t prev = s->storage[s->cur_addr]; |
| |
| if (!s->write_enable) { |
| qemu_log_mask(LOG_GUEST_ERROR, "M25P80: write with write protect!\n"); |
| } |
| |
| if ((prev ^ data) & data) { |
| DB_PRINT_L(1, "programming zero to one! addr=%" PRIx64 " %" PRIx8 |
| " -> %" PRIx8 "\n", addr, prev, data); |
| } |
| |
| if (s->pi->flags & WR_1) { |
| s->storage[s->cur_addr] = data; |
| } else { |
| s->storage[s->cur_addr] &= data; |
| } |
| |
| flash_sync_dirty(s, page); |
| s->dirty_page = page; |
| } |
| |
| static void complete_collecting_data(Flash *s) |
| { |
| s->cur_addr = s->data[0] << 16; |
| s->cur_addr |= s->data[1] << 8; |
| s->cur_addr |= s->data[2]; |
| |
| s->state = STATE_IDLE; |
| |
| switch (s->cmd_in_progress) { |
| case DPP: |
| case QPP: |
| case PP: |
| s->state = STATE_PAGE_PROGRAM; |
| break; |
| case READ: |
| case FAST_READ: |
| case DOR: |
| case QOR: |
| case DIOR: |
| case QIOR: |
| s->state = STATE_READ; |
| break; |
| case ERASE_4K: |
| case ERASE_32K: |
| case ERASE_SECTOR: |
| flash_erase(s, s->cur_addr, s->cmd_in_progress); |
| break; |
| case WRSR: |
| if (s->write_enable) { |
| s->write_enable = false; |
| } |
| break; |
| default: |
| break; |
| } |
| } |
| |
| static void decode_new_cmd(Flash *s, uint32_t value) |
| { |
| s->cmd_in_progress = value; |
| DB_PRINT_L(0, "decoded new command:%x\n", value); |
| |
| switch (value) { |
| |
| case ERASE_4K: |
| case ERASE_32K: |
| case ERASE_SECTOR: |
| case READ: |
| case DPP: |
| case QPP: |
| case PP: |
| s->needed_bytes = 3; |
| s->pos = 0; |
| s->len = 0; |
| s->state = STATE_COLLECTING_DATA; |
| break; |
| |
| case FAST_READ: |
| case DOR: |
| case QOR: |
| s->needed_bytes = 4; |
| s->pos = 0; |
| s->len = 0; |
| s->state = STATE_COLLECTING_DATA; |
| break; |
| |
| case DIOR: |
| switch ((s->pi->jedec >> 16) & 0xFF) { |
| case JEDEC_WINBOND: |
| case JEDEC_SPANSION: |
| s->needed_bytes = 4; |
| break; |
| case JEDEC_NUMONYX: |
| default: |
| s->needed_bytes = 5; |
| } |
| s->pos = 0; |
| s->len = 0; |
| s->state = STATE_COLLECTING_DATA; |
| break; |
| |
| case QIOR: |
| switch ((s->pi->jedec >> 16) & 0xFF) { |
| case JEDEC_WINBOND: |
| case JEDEC_SPANSION: |
| s->needed_bytes = 6; |
| break; |
| case JEDEC_NUMONYX: |
| default: |
| s->needed_bytes = 8; |
| } |
| s->pos = 0; |
| s->len = 0; |
| s->state = STATE_COLLECTING_DATA; |
| break; |
| |
| case WRSR: |
| if (s->write_enable) { |
| s->needed_bytes = 1; |
| s->pos = 0; |
| s->len = 0; |
| 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_L(0, "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_L(0, "chip erase\n"); |
| flash_erase(s, 0, BULK_ERASE); |
| } else { |
| qemu_log_mask(LOG_GUEST_ERROR, "M25P80: chip erase with write " |
| "protect!\n"); |
| } |
| break; |
| case NOP: |
| break; |
| default: |
| qemu_log_mask(LOG_GUEST_ERROR, "M25P80: 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_L(0, "%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_L(1, "page program cur_addr=%#" PRIx64 " data=%" PRIx8 "\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_L(1, "READ 0x%" PRIx64 "=%" PRIx8 "\n", s->cur_addr, |
| (uint8_t)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); |
| M25P80Class *mc = M25P80_GET_CLASS(s); |
| |
| s->pi = mc->pi; |
| |
| 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_L(0, "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 { |
| DB_PRINT_L(0, "No BDRV - binding to RAM\n"); |
| 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 void m25p80_class_init(ObjectClass *klass, void *data) |
| { |
| DeviceClass *dc = DEVICE_CLASS(klass); |
| SSISlaveClass *k = SSI_SLAVE_CLASS(klass); |
| M25P80Class *mc = M25P80_CLASS(klass); |
| |
| k->init = m25p80_init; |
| k->transfer = m25p80_transfer8; |
| k->set_cs = m25p80_cs; |
| k->cs_polarity = SSI_CS_LOW; |
| dc->vmsd = &vmstate_m25p80; |
| mc->pi = data; |
| } |
| |
| static const TypeInfo m25p80_info = { |
| .name = TYPE_M25P80, |
| .parent = TYPE_SSI_SLAVE, |
| .instance_size = sizeof(Flash), |
| .class_size = sizeof(M25P80Class), |
| .abstract = true, |
| }; |
| |
| static void m25p80_register_types(void) |
| { |
| int i; |
| |
| type_register_static(&m25p80_info); |
| for (i = 0; i < ARRAY_SIZE(known_devices); ++i) { |
| TypeInfo ti = { |
| .name = known_devices[i].part_name, |
| .parent = TYPE_M25P80, |
| .class_init = m25p80_class_init, |
| .class_data = (void *)&known_devices[i], |
| }; |
| type_register(&ti); |
| } |
| } |
| |
| type_init(m25p80_register_types) |
