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qemu/hw/block/m25p80.c
Marcin Krzeminski fe84770528 m25p80: Fix QIOR/DIOR handling for Winbond 
Winbond also support continuous read mode, but as an opposite for other
flash type read mode clock cycles are included to dummy cycles number.
This path add proper handling of read mode byte and update needed
dummy cycles. QPI mode and dummy cycles configuration are not supported.

Signed-off-by: Marcin Krzeminski <marcin.krzeminski@nokia.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Message-id: 1467809036-6986-1-git-send-email-marcin.krzeminski@nokia.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2016-07-14 16:51:38 +01:00

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/*
* 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 "qemu/osdep.h"
#include "hw/hw.h"
#include "sysemu/block-backend.h"
#include "sysemu/blockdev.h"
#include "hw/ssi/ssi.h"
#include "qemu/bitops.h"
#include "qemu/log.h"
#include "qapi/error.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 EEPROM 0x100
/* 16 MiB max in 3 byte address mode */
#define MAX_3BYTES_SIZE 0x1000000
#define SPI_NOR_MAX_ID_LEN 6
typedef struct FlashPartInfo {
const char *part_name;
/*
* This array stores the ID bytes.
* The first three bytes are the JEDIC ID.
* JEDEC ID zero means "no ID" (mostly older chips).
*/
uint8_t id[SPI_NOR_MAX_ID_LEN];
uint8_t id_len;
/* 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;
uint16_t flags;
} FlashPartInfo;
/* adapted from linux */
/* Used when the "_ext_id" is two bytes at most */
#define INFO(_part_name, _jedec_id, _ext_id, _sector_size, _n_sectors, _flags)\
.part_name = _part_name,\
.id = {\
((_jedec_id) >> 16) & 0xff,\
((_jedec_id) >> 8) & 0xff,\
(_jedec_id) & 0xff,\
((_ext_id) >> 8) & 0xff,\
(_ext_id) & 0xff,\
},\
.id_len = (!(_jedec_id) ? 0 : (3 + ((_ext_id) ? 2 : 0))),\
.sector_size = (_sector_size),\
.n_sectors = (_n_sectors),\
.page_size = 256,\
.flags = (_flags),
#define INFO6(_part_name, _jedec_id, _ext_id, _sector_size, _n_sectors, _flags)\
.part_name = _part_name,\
.id = {\
((_jedec_id) >> 16) & 0xff,\
((_jedec_id) >> 8) & 0xff,\
(_jedec_id) & 0xff,\
((_ext_id) >> 16) & 0xff,\
((_ext_id) >> 8) & 0xff,\
(_ext_id) & 0xff,\
},\
.id_len = 6,\
.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
/* Numonyx (Micron) Configuration register macros */
#define VCFG_DUMMY 0x1
#define VCFG_WRAP_SEQUENTIAL 0x2
#define NVCFG_XIP_MODE_DISABLED (7 << 9)
#define NVCFG_XIP_MODE_MASK (7 << 9)
#define VCFG_XIP_MODE_ENABLED (1 << 3)
#define CFG_DUMMY_CLK_LEN 4
#define NVCFG_DUMMY_CLK_POS 12
#define VCFG_DUMMY_CLK_POS 4
#define EVCFG_OUT_DRIVER_STRENGHT_DEF 7
#define EVCFG_VPP_ACCELERATOR (1 << 3)
#define EVCFG_RESET_HOLD_ENABLED (1 << 4)
#define NVCFG_DUAL_IO_MASK (1 << 2)
#define EVCFG_DUAL_IO_ENABLED (1 << 6)
#define NVCFG_QUAD_IO_MASK (1 << 3)
#define EVCFG_QUAD_IO_ENABLED (1 << 7)
#define NVCFG_4BYTE_ADDR_MASK (1 << 0)
#define NVCFG_LOWER_SEGMENT_MASK (1 << 1)
/* Numonyx (Micron) Flag Status Register macros */
#define FSR_4BYTE_ADDR_MODE_ENABLED 0x1
#define FSR_FLASH_READY (1 << 7)
/* Spansion configuration registers macros. */
#define SPANSION_QUAD_CFG_POS 0
#define SPANSION_QUAD_CFG_LEN 1
#define SPANSION_DUMMY_CLK_POS 0
#define SPANSION_DUMMY_CLK_LEN 4
#define SPANSION_ADDR_LEN_POS 7
#define SPANSION_ADDR_LEN_LEN 1
/*
* Spansion read mode command length in bytes,
* the mode is currently not supported.
*/
#define SPANSION_CONTINUOUS_READ_MODE_CMD_LEN 1
#define WINBOND_CONTINUOUS_READ_MODE_CMD_LEN 1
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) },
/* Atmel EEPROMS - it is assumed, that don't care bit in command
* is set to 0. Block protection is not supported.
*/
{ INFO("at25128a-nonjedec", 0x0, 0, 1, 131072, EEPROM) },
{ INFO("at25256a-nonjedec", 0x0, 0, 1, 262144, EEPROM) },
/* 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) },
{ INFO("mx66u51235f", 0xc2253a, 0, 64 << 10, 1024, ER_4K | ER_32K) },
{ INFO("mx66u1g45g", 0xc2253b, 0, 64 << 10, 2048, ER_4K | ER_32K) },
/* Micron */
{ INFO("n25q032a11", 0x20bb16, 0, 64 << 10, 64, ER_4K) },
{ INFO("n25q032a13", 0x20ba16, 0, 64 << 10, 64, ER_4K) },
{ INFO("n25q064a11", 0x20bb17, 0, 64 << 10, 128, ER_4K) },
{ INFO("n25q064a13", 0x20ba17, 0, 64 << 10, 128, ER_4K) },
{ INFO("n25q128a11", 0x20bb18, 0, 64 << 10, 256, ER_4K) },
{ INFO("n25q128a13", 0x20ba18, 0, 64 << 10, 256, ER_4K) },
{ INFO("n25q256a11", 0x20bb19, 0, 64 << 10, 512, ER_4K) },
{ INFO("n25q256a13", 0x20ba19, 0, 64 << 10, 512, ER_4K) },
{ INFO("n25q128", 0x20ba18, 0, 64 << 10, 256, 0) },
{ INFO("n25q256a", 0x20ba19, 0, 64 << 10, 512, ER_4K) },
{ INFO("n25q512a", 0x20ba20, 0, 64 << 10, 1024, ER_4K) },
{ INFO("mt25ql01g", 0x20ba21, 0, 64 << 10, 2048, ER_4K) },
{ INFO("mt25qu01g", 0x20bb21, 0, 64 << 10, 2048, 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) },
{ INFO6("s25fl512s", 0x010220, 0x4d0080, 256 << 10, 256, 0) },
{ INFO6("s70fl01gs", 0x010221, 0x4d0080, 256 << 10, 512, 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) },
/* Spansion -- boot sectors support */
{ INFO6("s25fs512s", 0x010220, 0x4d0081, 256 << 10, 256, 0) },
{ INFO6("s70fs01gs", 0x010221, 0x4d0081, 256 << 10, 512, 0) },
/* 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) },
{ INFO("sst25wf080", 0xbf2505, 0, 64 << 10, 16, 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) },
};
typedef enum {
NOP = 0,
WRSR = 0x1,
WRDI = 0x4,
RDSR = 0x5,
WREN = 0x6,
JEDEC_READ = 0x9f,
BULK_ERASE = 0xc7,
READ_FSR = 0x70,
RDCR = 0x15,
READ = 0x03,
READ4 = 0x13,
FAST_READ = 0x0b,
FAST_READ4 = 0x0c,
DOR = 0x3b,
DOR4 = 0x3c,
QOR = 0x6b,
QOR4 = 0x6c,
DIOR = 0xbb,
DIOR4 = 0xbc,
QIOR = 0xeb,
QIOR4 = 0xec,
PP = 0x02,
PP4 = 0x12,
PP4_4 = 0x3e,
DPP = 0xa2,
QPP = 0x32,
ERASE_4K = 0x20,
ERASE4_4K = 0x21,
ERASE_32K = 0x52,
ERASE4_32K = 0x5c,
ERASE_SECTOR = 0xd8,
ERASE4_SECTOR = 0xdc,
EN_4BYTE_ADDR = 0xB7,
EX_4BYTE_ADDR = 0xE9,
EXTEND_ADDR_READ = 0xC8,
EXTEND_ADDR_WRITE = 0xC5,
RESET_ENABLE = 0x66,
RESET_MEMORY = 0x99,
/*
* Micron: 0x35 - enable QPI
* Spansion: 0x35 - read control register
*/
RDCR_EQIO = 0x35,
RSTQIO = 0xf5,
RNVCR = 0xB5,
WNVCR = 0xB1,
RVCR = 0x85,
WVCR = 0x81,
REVCR = 0x65,
WEVCR = 0x61,
} FlashCMD;
typedef enum {
STATE_IDLE,
STATE_PAGE_PROGRAM,
STATE_READ,
STATE_COLLECTING_DATA,
STATE_COLLECTING_VAR_LEN_DATA,
STATE_READING_DATA,
} CMDState;
typedef enum {
MAN_SPANSION,
MAN_MACRONIX,
MAN_NUMONYX,
MAN_WINBOND,
MAN_GENERIC,
} Manufacturer;
typedef struct Flash {
SSISlave parent_obj;
BlockBackend *blk;
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;
uint32_t cur_addr;
uint32_t nonvolatile_cfg;
/* Configuration register for Macronix */
uint32_t volatile_cfg;
uint32_t enh_volatile_cfg;
/* Spansion cfg registers. */
uint8_t spansion_cr1nv;
uint8_t spansion_cr2nv;
uint8_t spansion_cr3nv;
uint8_t spansion_cr4nv;
uint8_t spansion_cr1v;
uint8_t spansion_cr2v;
uint8_t spansion_cr3v;
uint8_t spansion_cr4v;
bool write_enable;
bool four_bytes_address_mode;
bool reset_enable;
bool quad_enable;
uint8_t ear;
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 inline Manufacturer get_man(Flash *s)
{
switch (s->pi->id[0]) {
case 0x20:
return MAN_NUMONYX;
case 0xEF:
return MAN_WINBOND;
case 0x01:
return MAN_SPANSION;
case 0xC2:
return MAN_MACRONIX;
default:
return MAN_GENERIC;
}
}
static void blk_sync_complete(void *opaque, int ret)
{
QEMUIOVector *iov = opaque;
qemu_iovec_destroy(iov);
g_free(iov);
/* 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)
{
QEMUIOVector *iov;
if (!s->blk || blk_is_read_only(s->blk)) {
return;
}
iov = g_new(QEMUIOVector, 1);
qemu_iovec_init(iov, 1);
qemu_iovec_add(iov, s->storage + page * s->pi->page_size,
s->pi->page_size);
blk_aio_pwritev(s->blk, page * s->pi->page_size, iov, 0,
blk_sync_complete, iov);
}
static inline void flash_sync_area(Flash *s, int64_t off, int64_t len)
{
QEMUIOVector *iov;
if (!s->blk || blk_is_read_only(s->blk)) {
return;
}
assert(!(len % BDRV_SECTOR_SIZE));
iov = g_new(QEMUIOVector, 1);
qemu_iovec_init(iov, 1);
qemu_iovec_add(iov, s->storage + off, len);
blk_aio_pwritev(s->blk, off, iov, 0, blk_sync_complete, iov);
}
static void flash_erase(Flash *s, int offset, FlashCMD cmd)
{
uint32_t len;
uint8_t capa_to_assert = 0;
switch (cmd) {
case ERASE_4K:
case ERASE4_4K:
len = 4 << 10;
capa_to_assert = ER_4K;
break;
case ERASE_32K:
case ERASE4_32K:
len = 32 << 10;
capa_to_assert = ER_32K;
break;
case ERASE_SECTOR:
case ERASE4_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, uint32_t addr, uint8_t data)
{
uint32_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=%" PRIx32 " %" PRIx8
" -> %" PRIx8 "\n", addr, prev, data);
}
if (s->pi->flags & EEPROM) {
s->storage[s->cur_addr] = data;
} else {
s->storage[s->cur_addr] &= data;
}
flash_sync_dirty(s, page);
s->dirty_page = page;
}
static inline int get_addr_length(Flash *s)
{
/* check if eeprom is in use */
if (s->pi->flags == EEPROM) {
return 2;
}
switch (s->cmd_in_progress) {
case PP4:
case PP4_4:
case READ4:
case QIOR4:
case ERASE4_4K:
case ERASE4_32K:
case ERASE4_SECTOR:
case FAST_READ4:
case DOR4:
case QOR4:
case DIOR4:
return 4;
default:
return s->four_bytes_address_mode ? 4 : 3;
}
}
static void complete_collecting_data(Flash *s)
{
int i, n;
n = get_addr_length(s);
s->cur_addr = (n == 3 ? s->ear : 0);
for (i = 0; i < n; ++i) {
s->cur_addr <<= 8;
s->cur_addr |= s->data[i];
}
s->cur_addr &= s->size - 1;
s->state = STATE_IDLE;
switch (s->cmd_in_progress) {
case DPP:
case QPP:
case PP:
case PP4:
case PP4_4:
s->state = STATE_PAGE_PROGRAM;
break;
case READ:
case READ4:
case FAST_READ:
case FAST_READ4:
case DOR:
case DOR4:
case QOR:
case QOR4:
case DIOR:
case DIOR4:
case QIOR:
case QIOR4:
s->state = STATE_READ;
break;
case ERASE_4K:
case ERASE4_4K:
case ERASE_32K:
case ERASE4_32K:
case ERASE_SECTOR:
case ERASE4_SECTOR:
flash_erase(s, s->cur_addr, s->cmd_in_progress);
break;
case WRSR:
switch (get_man(s)) {
case MAN_SPANSION:
s->quad_enable = !!(s->data[1] & 0x02);
break;
case MAN_MACRONIX:
s->quad_enable = extract32(s->data[0], 6, 1);
if (s->len > 1) {
s->four_bytes_address_mode = extract32(s->data[1], 5, 1);
}
break;
default:
break;
}
if (s->write_enable) {
s->write_enable = false;
}
break;
case EXTEND_ADDR_WRITE:
s->ear = s->data[0];
break;
case WNVCR:
s->nonvolatile_cfg = s->data[0] | (s->data[1] << 8);
break;
case WVCR:
s->volatile_cfg = s->data[0];
break;
case WEVCR:
s->enh_volatile_cfg = s->data[0];
break;
default:
break;
}
}
static void reset_memory(Flash *s)
{
s->cmd_in_progress = NOP;
s->cur_addr = 0;
s->ear = 0;
s->four_bytes_address_mode = false;
s->len = 0;
s->needed_bytes = 0;
s->pos = 0;
s->state = STATE_IDLE;
s->write_enable = false;
s->reset_enable = false;
s->quad_enable = false;
switch (get_man(s)) {
case MAN_NUMONYX:
s->volatile_cfg = 0;
s->volatile_cfg |= VCFG_DUMMY;
s->volatile_cfg |= VCFG_WRAP_SEQUENTIAL;
if ((s->nonvolatile_cfg & NVCFG_XIP_MODE_MASK)
!= NVCFG_XIP_MODE_DISABLED) {
s->volatile_cfg |= VCFG_XIP_MODE_ENABLED;
}
s->volatile_cfg |= deposit32(s->volatile_cfg,
VCFG_DUMMY_CLK_POS,
CFG_DUMMY_CLK_LEN,
extract32(s->nonvolatile_cfg,
NVCFG_DUMMY_CLK_POS,
CFG_DUMMY_CLK_LEN)
);
s->enh_volatile_cfg = 0;
s->enh_volatile_cfg |= EVCFG_OUT_DRIVER_STRENGHT_DEF;
s->enh_volatile_cfg |= EVCFG_VPP_ACCELERATOR;
s->enh_volatile_cfg |= EVCFG_RESET_HOLD_ENABLED;
if (s->nonvolatile_cfg & NVCFG_DUAL_IO_MASK) {
s->enh_volatile_cfg |= EVCFG_DUAL_IO_ENABLED;
}
if (s->nonvolatile_cfg & NVCFG_QUAD_IO_MASK) {
s->enh_volatile_cfg |= EVCFG_QUAD_IO_ENABLED;
}
if (!(s->nonvolatile_cfg & NVCFG_4BYTE_ADDR_MASK)) {
s->four_bytes_address_mode = true;
}
if (!(s->nonvolatile_cfg & NVCFG_LOWER_SEGMENT_MASK)) {
s->ear = s->size / MAX_3BYTES_SIZE - 1;
}
break;
case MAN_MACRONIX:
s->volatile_cfg = 0x7;
break;
case MAN_SPANSION:
s->spansion_cr1v = s->spansion_cr1nv;
s->spansion_cr2v = s->spansion_cr2nv;
s->spansion_cr3v = s->spansion_cr3nv;
s->spansion_cr4v = s->spansion_cr4nv;
s->quad_enable = extract32(s->spansion_cr1v,
SPANSION_QUAD_CFG_POS,
SPANSION_QUAD_CFG_LEN
);
s->four_bytes_address_mode = extract32(s->spansion_cr2v,
SPANSION_ADDR_LEN_POS,
SPANSION_ADDR_LEN_LEN
);
break;
default:
break;
}
DB_PRINT_L(0, "Reset done.\n");
}
static void decode_fast_read_cmd(Flash *s)
{
s->needed_bytes = get_addr_length(s);
switch (get_man(s)) {
/* Dummy cycles - modeled with bytes writes instead of bits */
case MAN_WINBOND:
s->needed_bytes += 8;
break;
case MAN_NUMONYX:
s->needed_bytes += extract32(s->volatile_cfg, 4, 4);
break;
case MAN_MACRONIX:
if (extract32(s->volatile_cfg, 6, 2) == 1) {
s->needed_bytes += 6;
} else {
s->needed_bytes += 8;
}
break;
case MAN_SPANSION:
s->needed_bytes += extract32(s->spansion_cr2v,
SPANSION_DUMMY_CLK_POS,
SPANSION_DUMMY_CLK_LEN
);
break;
default:
break;
}
s->pos = 0;
s->len = 0;
s->state = STATE_COLLECTING_DATA;
}
static void decode_dio_read_cmd(Flash *s)
{
s->needed_bytes = get_addr_length(s);
/* Dummy cycles modeled with bytes writes instead of bits */
switch (get_man(s)) {
case MAN_WINBOND:
s->needed_bytes += WINBOND_CONTINUOUS_READ_MODE_CMD_LEN;
break;
case MAN_SPANSION:
s->needed_bytes += SPANSION_CONTINUOUS_READ_MODE_CMD_LEN;
s->needed_bytes += extract32(s->spansion_cr2v,
SPANSION_DUMMY_CLK_POS,
SPANSION_DUMMY_CLK_LEN
);
break;
case MAN_NUMONYX:
s->needed_bytes += extract32(s->volatile_cfg, 4, 4);
break;
case MAN_MACRONIX:
switch (extract32(s->volatile_cfg, 6, 2)) {
case 1:
s->needed_bytes += 6;
break;
case 2:
s->needed_bytes += 8;
break;
default:
s->needed_bytes += 4;
break;
}
break;
default:
break;
}
s->pos = 0;
s->len = 0;
s->state = STATE_COLLECTING_DATA;
}
static void decode_qio_read_cmd(Flash *s)
{
s->needed_bytes = get_addr_length(s);
/* Dummy cycles modeled with bytes writes instead of bits */
switch (get_man(s)) {
case MAN_WINBOND:
s->needed_bytes += WINBOND_CONTINUOUS_READ_MODE_CMD_LEN;
s->needed_bytes += 4;
break;
case MAN_SPANSION:
s->needed_bytes += SPANSION_CONTINUOUS_READ_MODE_CMD_LEN;
s->needed_bytes += extract32(s->spansion_cr2v,
SPANSION_DUMMY_CLK_POS,
SPANSION_DUMMY_CLK_LEN
);
break;
case MAN_NUMONYX:
s->needed_bytes += extract32(s->volatile_cfg, 4, 4);
break;
case MAN_MACRONIX:
switch (extract32(s->volatile_cfg, 6, 2)) {
case 1:
s->needed_bytes += 4;
break;
case 2:
s->needed_bytes += 8;
break;
default:
s->needed_bytes += 6;
break;
}
break;
default:
break;
}
s->pos = 0;
s->len = 0;
s->state = STATE_COLLECTING_DATA;
}
static void decode_new_cmd(Flash *s, uint32_t value)
{
s->cmd_in_progress = value;
int i;
DB_PRINT_L(0, "decoded new command:%x\n", value);
if (value != RESET_MEMORY) {
s->reset_enable = false;
}
switch (value) {
case ERASE_4K:
case ERASE4_4K:
case ERASE_32K:
case ERASE4_32K:
case ERASE_SECTOR:
case ERASE4_SECTOR:
case READ:
case READ4:
case DPP:
case QPP:
case PP:
case PP4:
case PP4_4:
s->needed_bytes = get_addr_length(s);
s->pos = 0;
s->len = 0;
s->state = STATE_COLLECTING_DATA;
break;
case FAST_READ:
case FAST_READ4:
case DOR:
case DOR4:
case QOR:
case QOR4:
decode_fast_read_cmd(s);
break;
case DIOR:
case DIOR4:
decode_dio_read_cmd(s);
break;
case QIOR:
case QIOR4:
decode_qio_read_cmd(s);
break;
case WRSR:
if (s->write_enable) {
switch (get_man(s)) {
case MAN_SPANSION:
s->needed_bytes = 2;
s->state = STATE_COLLECTING_DATA;
break;
case MAN_MACRONIX:
s->needed_bytes = 2;
s->state = STATE_COLLECTING_VAR_LEN_DATA;
break;
default:
s->needed_bytes = 1;
s->state = STATE_COLLECTING_DATA;
}
s->pos = 0;
}
break;
case WRDI:
s->write_enable = false;
break;
case WREN:
s->write_enable = true;
break;
case RDSR:
s->data[0] = (!!s->write_enable) << 1;
if (get_man(s) == MAN_MACRONIX) {
s->data[0] |= (!!s->quad_enable) << 6;
}
s->pos = 0;
s->len = 1;
s->state = STATE_READING_DATA;
break;
case READ_FSR:
s->data[0] = FSR_FLASH_READY;
if (s->four_bytes_address_mode) {
s->data[0] |= FSR_4BYTE_ADDR_MODE_ENABLED;
}
s->pos = 0;
s->len = 1;
s->state = STATE_READING_DATA;
break;
case JEDEC_READ:
DB_PRINT_L(0, "populated jedec code\n");
for (i = 0; i < s->pi->id_len; i++) {
s->data[i] = s->pi->id[i];
}
s->len = s->pi->id_len;
s->pos = 0;
s->state = STATE_READING_DATA;
break;
case RDCR:
s->data[0] = s->volatile_cfg & 0xFF;
s->data[0] |= (!!s->four_bytes_address_mode) << 5;
s->pos = 0;
s->len = 1;
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;
case EN_4BYTE_ADDR:
s->four_bytes_address_mode = true;
break;
case EX_4BYTE_ADDR:
s->four_bytes_address_mode = false;
break;
case EXTEND_ADDR_READ:
s->data[0] = s->ear;
s->pos = 0;
s->len = 1;
s->state = STATE_READING_DATA;
break;
case EXTEND_ADDR_WRITE:
if (s->write_enable) {
s->needed_bytes = 1;
s->pos = 0;
s->len = 0;
s->state = STATE_COLLECTING_DATA;
}
break;
case RNVCR:
s->data[0] = s->nonvolatile_cfg & 0xFF;
s->data[1] = (s->nonvolatile_cfg >> 8) & 0xFF;
s->pos = 0;
s->len = 2;
s->state = STATE_READING_DATA;
break;
case WNVCR:
if (s->write_enable && get_man(s) == MAN_NUMONYX) {
s->needed_bytes = 2;
s->pos = 0;
s->len = 0;
s->state = STATE_COLLECTING_DATA;
}
break;
case RVCR:
s->data[0] = s->volatile_cfg & 0xFF;
s->pos = 0;
s->len = 1;
s->state = STATE_READING_DATA;
break;
case WVCR:
if (s->write_enable) {
s->needed_bytes = 1;
s->pos = 0;
s->len = 0;
s->state = STATE_COLLECTING_DATA;
}
break;
case REVCR:
s->data[0] = s->enh_volatile_cfg & 0xFF;
s->pos = 0;
s->len = 1;
s->state = STATE_READING_DATA;
break;
case WEVCR:
if (s->write_enable) {
s->needed_bytes = 1;
s->pos = 0;
s->len = 0;
s->state = STATE_COLLECTING_DATA;
}
break;
case RESET_ENABLE:
s->reset_enable = true;
break;
case RESET_MEMORY:
if (s->reset_enable) {
reset_memory(s);
}
break;
case RDCR_EQIO:
switch (get_man(s)) {
case MAN_SPANSION:
s->data[0] = (!!s->quad_enable) << 1;
s->pos = 0;
s->len = 1;
s->state = STATE_READING_DATA;
break;
case MAN_MACRONIX:
s->quad_enable = true;
break;
default:
break;
}
break;
case RSTQIO:
s->quad_enable = false;
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 = M25P80(ss);
if (select) {
if (s->state == STATE_COLLECTING_VAR_LEN_DATA) {
complete_collecting_data(s);
}
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 = M25P80(ss);
uint32_t r = 0;
switch (s->state) {
case STATE_PAGE_PROGRAM:
DB_PRINT_L(1, "page program cur_addr=%#" PRIx32 " data=%" PRIx8 "\n",
s->cur_addr, (uint8_t)tx);
flash_write8(s, s->cur_addr, (uint8_t)tx);
s->cur_addr = (s->cur_addr + 1) & (s->size - 1);
break;
case STATE_READ:
r = s->storage[s->cur_addr];
DB_PRINT_L(1, "READ 0x%" PRIx32 "=%" PRIx8 "\n", s->cur_addr,
(uint8_t)r);
s->cur_addr = (s->cur_addr + 1) & (s->size - 1);
break;
case STATE_COLLECTING_DATA:
case STATE_COLLECTING_VAR_LEN_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 void m25p80_realize(SSISlave *ss, Error **errp)
{
Flash *s = M25P80(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;
if (s->blk) {
DB_PRINT_L(0, "Binding to IF_MTD drive\n");
s->storage = blk_blockalign(s->blk, s->size);
if (blk_pread(s->blk, 0, s->storage, s->size) != s->size) {
error_setg(errp, "failed to read the initial flash content");
return;
}
} else {
DB_PRINT_L(0, "No BDRV - binding to RAM\n");
s->storage = blk_blockalign(NULL, s->size);
memset(s->storage, 0xFF, s->size);
}
}
static void m25p80_reset(DeviceState *d)
{
Flash *s = M25P80(d);
reset_memory(s);
}
static void m25p80_pre_save(void *opaque)
{
flash_sync_dirty((Flash *)opaque, -1);
}
static Property m25p80_properties[] = {
/* This is default value for Micron flash */
DEFINE_PROP_UINT32("nonvolatile-cfg", Flash, nonvolatile_cfg, 0x8FFF),
DEFINE_PROP_UINT8("spansion-cr1nv", Flash, spansion_cr1nv, 0x0),
DEFINE_PROP_UINT8("spansion-cr2nv", Flash, spansion_cr2nv, 0x8),
DEFINE_PROP_UINT8("spansion-cr3nv", Flash, spansion_cr3nv, 0x2),
DEFINE_PROP_UINT8("spansion-cr4nv", Flash, spansion_cr4nv, 0x10),
DEFINE_PROP_DRIVE("drive", Flash, blk),
DEFINE_PROP_END_OF_LIST(),
};
static const VMStateDescription vmstate_m25p80 = {
.name = "xilinx_spi",
.version_id = 3,
.minimum_version_id = 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_UNUSED(4),
VMSTATE_UINT32(cur_addr, Flash),
VMSTATE_BOOL(write_enable, Flash),
VMSTATE_BOOL_V(reset_enable, Flash, 2),
VMSTATE_UINT8_V(ear, Flash, 2),
VMSTATE_BOOL_V(four_bytes_address_mode, Flash, 2),
VMSTATE_UINT32_V(nonvolatile_cfg, Flash, 2),
VMSTATE_UINT32_V(volatile_cfg, Flash, 2),
VMSTATE_UINT32_V(enh_volatile_cfg, Flash, 2),
VMSTATE_BOOL_V(quad_enable, Flash, 3),
VMSTATE_UINT8_V(spansion_cr1nv, Flash, 3),
VMSTATE_UINT8_V(spansion_cr2nv, Flash, 3),
VMSTATE_UINT8_V(spansion_cr3nv, Flash, 3),
VMSTATE_UINT8_V(spansion_cr4nv, Flash, 3),
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->realize = m25p80_realize;
k->transfer = m25p80_transfer8;
k->set_cs = m25p80_cs;
k->cs_polarity = SSI_CS_LOW;
dc->vmsd = &vmstate_m25p80;
dc->props = m25p80_properties;
dc->reset = m25p80_reset;
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)
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