1 /* 2 * ST M25P80 emulator. Emulate all SPI flash devices based on the m25p80 command 3 * set. Known devices table current as of Jun/2012 and taken from linux. 4 * See drivers/mtd/devices/m25p80.c. 5 * 6 * Copyright (C) 2011 Edgar E. Iglesias <edgar.iglesias@gmail.com> 7 * Copyright (C) 2012 Peter A. G. Crosthwaite <peter.crosthwaite@petalogix.com> 8 * Copyright (C) 2012 PetaLogix 9 * 10 * This program is free software; you can redistribute it and/or 11 * modify it under the terms of the GNU General Public License as 12 * published by the Free Software Foundation; either version 2 or 13 * (at your option) a later version of the License. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 * GNU General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public License along 21 * with this program; if not, see <http://www.gnu.org/licenses/>. 22 */ 23 24 #include "qemu/osdep.h" 25 #include "qemu/units.h" 26 #include "sysemu/block-backend.h" 27 #include "hw/qdev-properties.h" 28 #include "hw/qdev-properties-system.h" 29 #include "hw/ssi/ssi.h" 30 #include "migration/vmstate.h" 31 #include "qemu/bitops.h" 32 #include "qemu/log.h" 33 #include "qemu/module.h" 34 #include "qemu/error-report.h" 35 #include "qapi/error.h" 36 #include "trace.h" 37 #include "qom/object.h" 38 39 /* Fields for FlashPartInfo->flags */ 40 41 /* erase capabilities */ 42 #define ER_4K 1 43 #define ER_32K 2 44 /* set to allow the page program command to write 0s back to 1. Useful for 45 * modelling EEPROM with SPI flash command set 46 */ 47 #define EEPROM 0x100 48 49 /* 16 MiB max in 3 byte address mode */ 50 #define MAX_3BYTES_SIZE 0x1000000 51 52 #define SPI_NOR_MAX_ID_LEN 6 53 54 typedef struct FlashPartInfo { 55 const char *part_name; 56 /* 57 * This array stores the ID bytes. 58 * The first three bytes are the JEDIC ID. 59 * JEDEC ID zero means "no ID" (mostly older chips). 60 */ 61 uint8_t id[SPI_NOR_MAX_ID_LEN]; 62 uint8_t id_len; 63 /* there is confusion between manufacturers as to what a sector is. In this 64 * device model, a "sector" is the size that is erased by the ERASE_SECTOR 65 * command (opcode 0xd8). 66 */ 67 uint32_t sector_size; 68 uint32_t n_sectors; 69 uint32_t page_size; 70 uint16_t flags; 71 /* 72 * Big sized spi nor are often stacked devices, thus sometime 73 * replace chip erase with die erase. 74 * This field inform how many die is in the chip. 75 */ 76 uint8_t die_cnt; 77 } FlashPartInfo; 78 79 /* adapted from linux */ 80 /* Used when the "_ext_id" is two bytes at most */ 81 #define INFO(_part_name, _jedec_id, _ext_id, _sector_size, _n_sectors, _flags)\ 82 .part_name = _part_name,\ 83 .id = {\ 84 ((_jedec_id) >> 16) & 0xff,\ 85 ((_jedec_id) >> 8) & 0xff,\ 86 (_jedec_id) & 0xff,\ 87 ((_ext_id) >> 8) & 0xff,\ 88 (_ext_id) & 0xff,\ 89 },\ 90 .id_len = (!(_jedec_id) ? 0 : (3 + ((_ext_id) ? 2 : 0))),\ 91 .sector_size = (_sector_size),\ 92 .n_sectors = (_n_sectors),\ 93 .page_size = 256,\ 94 .flags = (_flags),\ 95 .die_cnt = 0 96 97 #define INFO6(_part_name, _jedec_id, _ext_id, _sector_size, _n_sectors, _flags)\ 98 .part_name = _part_name,\ 99 .id = {\ 100 ((_jedec_id) >> 16) & 0xff,\ 101 ((_jedec_id) >> 8) & 0xff,\ 102 (_jedec_id) & 0xff,\ 103 ((_ext_id) >> 16) & 0xff,\ 104 ((_ext_id) >> 8) & 0xff,\ 105 (_ext_id) & 0xff,\ 106 },\ 107 .id_len = 6,\ 108 .sector_size = (_sector_size),\ 109 .n_sectors = (_n_sectors),\ 110 .page_size = 256,\ 111 .flags = (_flags),\ 112 .die_cnt = 0 113 114 #define INFO_STACKED(_part_name, _jedec_id, _ext_id, _sector_size, _n_sectors,\ 115 _flags, _die_cnt)\ 116 .part_name = _part_name,\ 117 .id = {\ 118 ((_jedec_id) >> 16) & 0xff,\ 119 ((_jedec_id) >> 8) & 0xff,\ 120 (_jedec_id) & 0xff,\ 121 ((_ext_id) >> 8) & 0xff,\ 122 (_ext_id) & 0xff,\ 123 },\ 124 .id_len = (!(_jedec_id) ? 0 : (3 + ((_ext_id) ? 2 : 0))),\ 125 .sector_size = (_sector_size),\ 126 .n_sectors = (_n_sectors),\ 127 .page_size = 256,\ 128 .flags = (_flags),\ 129 .die_cnt = _die_cnt 130 131 #define JEDEC_NUMONYX 0x20 132 #define JEDEC_WINBOND 0xEF 133 #define JEDEC_SPANSION 0x01 134 135 /* Numonyx (Micron) Configuration register macros */ 136 #define VCFG_DUMMY 0x1 137 #define VCFG_WRAP_SEQUENTIAL 0x2 138 #define NVCFG_XIP_MODE_DISABLED (7 << 9) 139 #define NVCFG_XIP_MODE_MASK (7 << 9) 140 #define VCFG_XIP_MODE_DISABLED (1 << 3) 141 #define CFG_DUMMY_CLK_LEN 4 142 #define NVCFG_DUMMY_CLK_POS 12 143 #define VCFG_DUMMY_CLK_POS 4 144 #define EVCFG_OUT_DRIVER_STRENGTH_DEF 7 145 #define EVCFG_VPP_ACCELERATOR (1 << 3) 146 #define EVCFG_RESET_HOLD_ENABLED (1 << 4) 147 #define NVCFG_DUAL_IO_MASK (1 << 2) 148 #define EVCFG_DUAL_IO_DISABLED (1 << 6) 149 #define NVCFG_QUAD_IO_MASK (1 << 3) 150 #define EVCFG_QUAD_IO_DISABLED (1 << 7) 151 #define NVCFG_4BYTE_ADDR_MASK (1 << 0) 152 #define NVCFG_LOWER_SEGMENT_MASK (1 << 1) 153 154 /* Numonyx (Micron) Flag Status Register macros */ 155 #define FSR_4BYTE_ADDR_MODE_ENABLED 0x1 156 #define FSR_FLASH_READY (1 << 7) 157 158 /* Spansion configuration registers macros. */ 159 #define SPANSION_QUAD_CFG_POS 0 160 #define SPANSION_QUAD_CFG_LEN 1 161 #define SPANSION_DUMMY_CLK_POS 0 162 #define SPANSION_DUMMY_CLK_LEN 4 163 #define SPANSION_ADDR_LEN_POS 7 164 #define SPANSION_ADDR_LEN_LEN 1 165 166 /* 167 * Spansion read mode command length in bytes, 168 * the mode is currently not supported. 169 */ 170 171 #define SPANSION_CONTINUOUS_READ_MODE_CMD_LEN 1 172 #define WINBOND_CONTINUOUS_READ_MODE_CMD_LEN 1 173 174 static const FlashPartInfo known_devices[] = { 175 /* Atmel -- some are (confusingly) marketed as "DataFlash" */ 176 { INFO("at25fs010", 0x1f6601, 0, 32 << 10, 4, ER_4K) }, 177 { INFO("at25fs040", 0x1f6604, 0, 64 << 10, 8, ER_4K) }, 178 179 { INFO("at25df041a", 0x1f4401, 0, 64 << 10, 8, ER_4K) }, 180 { INFO("at25df321a", 0x1f4701, 0, 64 << 10, 64, ER_4K) }, 181 { INFO("at25df641", 0x1f4800, 0, 64 << 10, 128, ER_4K) }, 182 183 { INFO("at26f004", 0x1f0400, 0, 64 << 10, 8, ER_4K) }, 184 { INFO("at26df081a", 0x1f4501, 0, 64 << 10, 16, ER_4K) }, 185 { INFO("at26df161a", 0x1f4601, 0, 64 << 10, 32, ER_4K) }, 186 { INFO("at26df321", 0x1f4700, 0, 64 << 10, 64, ER_4K) }, 187 188 { INFO("at45db081d", 0x1f2500, 0, 64 << 10, 16, ER_4K) }, 189 190 /* Atmel EEPROMS - it is assumed, that don't care bit in command 191 * is set to 0. Block protection is not supported. 192 */ 193 { INFO("at25128a-nonjedec", 0x0, 0, 1, 131072, EEPROM) }, 194 { INFO("at25256a-nonjedec", 0x0, 0, 1, 262144, EEPROM) }, 195 196 /* EON -- en25xxx */ 197 { INFO("en25f32", 0x1c3116, 0, 64 << 10, 64, ER_4K) }, 198 { INFO("en25p32", 0x1c2016, 0, 64 << 10, 64, 0) }, 199 { INFO("en25q32b", 0x1c3016, 0, 64 << 10, 64, 0) }, 200 { INFO("en25p64", 0x1c2017, 0, 64 << 10, 128, 0) }, 201 { INFO("en25q64", 0x1c3017, 0, 64 << 10, 128, ER_4K) }, 202 203 /* GigaDevice */ 204 { INFO("gd25q32", 0xc84016, 0, 64 << 10, 64, ER_4K) }, 205 { INFO("gd25q64", 0xc84017, 0, 64 << 10, 128, ER_4K) }, 206 207 /* Intel/Numonyx -- xxxs33b */ 208 { INFO("160s33b", 0x898911, 0, 64 << 10, 32, 0) }, 209 { INFO("320s33b", 0x898912, 0, 64 << 10, 64, 0) }, 210 { INFO("640s33b", 0x898913, 0, 64 << 10, 128, 0) }, 211 { INFO("n25q064", 0x20ba17, 0, 64 << 10, 128, 0) }, 212 213 /* Macronix */ 214 { INFO("mx25l2005a", 0xc22012, 0, 64 << 10, 4, ER_4K) }, 215 { INFO("mx25l4005a", 0xc22013, 0, 64 << 10, 8, ER_4K) }, 216 { INFO("mx25l8005", 0xc22014, 0, 64 << 10, 16, 0) }, 217 { INFO("mx25l1606e", 0xc22015, 0, 64 << 10, 32, ER_4K) }, 218 { INFO("mx25l3205d", 0xc22016, 0, 64 << 10, 64, 0) }, 219 { INFO("mx25l6405d", 0xc22017, 0, 64 << 10, 128, 0) }, 220 { INFO("mx25l12805d", 0xc22018, 0, 64 << 10, 256, 0) }, 221 { INFO("mx25l12855e", 0xc22618, 0, 64 << 10, 256, 0) }, 222 { INFO6("mx25l25635e", 0xc22019, 0xc22019, 64 << 10, 512, 0) }, 223 { INFO("mx25l25655e", 0xc22619, 0, 64 << 10, 512, 0) }, 224 { INFO("mx66l51235f", 0xc2201a, 0, 64 << 10, 1024, ER_4K | ER_32K) }, 225 { INFO("mx66u51235f", 0xc2253a, 0, 64 << 10, 1024, ER_4K | ER_32K) }, 226 { INFO("mx66u1g45g", 0xc2253b, 0, 64 << 10, 2048, ER_4K | ER_32K) }, 227 { INFO("mx66l1g45g", 0xc2201b, 0, 64 << 10, 2048, ER_4K | ER_32K) }, 228 229 /* Micron */ 230 { INFO("n25q032a11", 0x20bb16, 0, 64 << 10, 64, ER_4K) }, 231 { INFO("n25q032a13", 0x20ba16, 0, 64 << 10, 64, ER_4K) }, 232 { INFO("n25q064a11", 0x20bb17, 0, 64 << 10, 128, ER_4K) }, 233 { INFO("n25q064a13", 0x20ba17, 0, 64 << 10, 128, ER_4K) }, 234 { INFO("n25q128a11", 0x20bb18, 0, 64 << 10, 256, ER_4K) }, 235 { INFO("n25q128a13", 0x20ba18, 0, 64 << 10, 256, ER_4K) }, 236 { INFO("n25q256a11", 0x20bb19, 0, 64 << 10, 512, ER_4K) }, 237 { INFO("n25q256a13", 0x20ba19, 0, 64 << 10, 512, ER_4K) }, 238 { INFO("n25q512a11", 0x20bb20, 0, 64 << 10, 1024, ER_4K) }, 239 { INFO("n25q512a13", 0x20ba20, 0, 64 << 10, 1024, ER_4K) }, 240 { INFO("n25q128", 0x20ba18, 0, 64 << 10, 256, 0) }, 241 { INFO("n25q256a", 0x20ba19, 0, 64 << 10, 512, ER_4K) }, 242 { INFO("n25q512a", 0x20ba20, 0, 64 << 10, 1024, ER_4K) }, 243 { INFO("n25q512ax3", 0x20ba20, 0x1000, 64 << 10, 1024, ER_4K) }, 244 { INFO("mt25ql512ab", 0x20ba20, 0x1044, 64 << 10, 1024, ER_4K | ER_32K) }, 245 { INFO_STACKED("n25q00", 0x20ba21, 0x1000, 64 << 10, 2048, ER_4K, 4) }, 246 { INFO_STACKED("n25q00a", 0x20bb21, 0x1000, 64 << 10, 2048, ER_4K, 4) }, 247 { INFO_STACKED("mt25ql01g", 0x20ba21, 0x1040, 64 << 10, 2048, ER_4K, 2) }, 248 { INFO_STACKED("mt25qu01g", 0x20bb21, 0x1040, 64 << 10, 2048, ER_4K, 2) }, 249 250 /* Spansion -- single (large) sector size only, at least 251 * for the chips listed here (without boot sectors). 252 */ 253 { INFO("s25sl032p", 0x010215, 0x4d00, 64 << 10, 64, ER_4K) }, 254 { INFO("s25sl064p", 0x010216, 0x4d00, 64 << 10, 128, ER_4K) }, 255 { INFO("s25fl256s0", 0x010219, 0x4d00, 256 << 10, 128, 0) }, 256 { INFO("s25fl256s1", 0x010219, 0x4d01, 64 << 10, 512, 0) }, 257 { INFO6("s25fl512s", 0x010220, 0x4d0080, 256 << 10, 256, 0) }, 258 { INFO6("s70fl01gs", 0x010221, 0x4d0080, 256 << 10, 512, 0) }, 259 { INFO("s25sl12800", 0x012018, 0x0300, 256 << 10, 64, 0) }, 260 { INFO("s25sl12801", 0x012018, 0x0301, 64 << 10, 256, 0) }, 261 { INFO("s25fl129p0", 0x012018, 0x4d00, 256 << 10, 64, 0) }, 262 { INFO("s25fl129p1", 0x012018, 0x4d01, 64 << 10, 256, 0) }, 263 { INFO("s25sl004a", 0x010212, 0, 64 << 10, 8, 0) }, 264 { INFO("s25sl008a", 0x010213, 0, 64 << 10, 16, 0) }, 265 { INFO("s25sl016a", 0x010214, 0, 64 << 10, 32, 0) }, 266 { INFO("s25sl032a", 0x010215, 0, 64 << 10, 64, 0) }, 267 { INFO("s25sl064a", 0x010216, 0, 64 << 10, 128, 0) }, 268 { INFO("s25fl016k", 0xef4015, 0, 64 << 10, 32, ER_4K | ER_32K) }, 269 { INFO("s25fl064k", 0xef4017, 0, 64 << 10, 128, ER_4K | ER_32K) }, 270 271 /* Spansion -- boot sectors support */ 272 { INFO6("s25fs512s", 0x010220, 0x4d0081, 256 << 10, 256, 0) }, 273 { INFO6("s70fs01gs", 0x010221, 0x4d0081, 256 << 10, 512, 0) }, 274 275 /* SST -- large erase sizes are "overlays", "sectors" are 4<< 10 */ 276 { INFO("sst25vf040b", 0xbf258d, 0, 64 << 10, 8, ER_4K) }, 277 { INFO("sst25vf080b", 0xbf258e, 0, 64 << 10, 16, ER_4K) }, 278 { INFO("sst25vf016b", 0xbf2541, 0, 64 << 10, 32, ER_4K) }, 279 { INFO("sst25vf032b", 0xbf254a, 0, 64 << 10, 64, ER_4K) }, 280 { INFO("sst25wf512", 0xbf2501, 0, 64 << 10, 1, ER_4K) }, 281 { INFO("sst25wf010", 0xbf2502, 0, 64 << 10, 2, ER_4K) }, 282 { INFO("sst25wf020", 0xbf2503, 0, 64 << 10, 4, ER_4K) }, 283 { INFO("sst25wf040", 0xbf2504, 0, 64 << 10, 8, ER_4K) }, 284 { INFO("sst25wf080", 0xbf2505, 0, 64 << 10, 16, ER_4K) }, 285 286 /* ST Microelectronics -- newer production may have feature updates */ 287 { INFO("m25p05", 0x202010, 0, 32 << 10, 2, 0) }, 288 { INFO("m25p10", 0x202011, 0, 32 << 10, 4, 0) }, 289 { INFO("m25p20", 0x202012, 0, 64 << 10, 4, 0) }, 290 { INFO("m25p40", 0x202013, 0, 64 << 10, 8, 0) }, 291 { INFO("m25p80", 0x202014, 0, 64 << 10, 16, 0) }, 292 { INFO("m25p16", 0x202015, 0, 64 << 10, 32, 0) }, 293 { INFO("m25p32", 0x202016, 0, 64 << 10, 64, 0) }, 294 { INFO("m25p64", 0x202017, 0, 64 << 10, 128, 0) }, 295 { INFO("m25p128", 0x202018, 0, 256 << 10, 64, 0) }, 296 { INFO("n25q032", 0x20ba16, 0, 64 << 10, 64, 0) }, 297 298 { INFO("m45pe10", 0x204011, 0, 64 << 10, 2, 0) }, 299 { INFO("m45pe80", 0x204014, 0, 64 << 10, 16, 0) }, 300 { INFO("m45pe16", 0x204015, 0, 64 << 10, 32, 0) }, 301 302 { INFO("m25pe20", 0x208012, 0, 64 << 10, 4, 0) }, 303 { INFO("m25pe80", 0x208014, 0, 64 << 10, 16, 0) }, 304 { INFO("m25pe16", 0x208015, 0, 64 << 10, 32, ER_4K) }, 305 306 { INFO("m25px32", 0x207116, 0, 64 << 10, 64, ER_4K) }, 307 { INFO("m25px32-s0", 0x207316, 0, 64 << 10, 64, ER_4K) }, 308 { INFO("m25px32-s1", 0x206316, 0, 64 << 10, 64, ER_4K) }, 309 { INFO("m25px64", 0x207117, 0, 64 << 10, 128, 0) }, 310 311 /* Winbond -- w25x "blocks" are 64k, "sectors" are 4KiB */ 312 { INFO("w25x10", 0xef3011, 0, 64 << 10, 2, ER_4K) }, 313 { INFO("w25x20", 0xef3012, 0, 64 << 10, 4, ER_4K) }, 314 { INFO("w25x40", 0xef3013, 0, 64 << 10, 8, ER_4K) }, 315 { INFO("w25x80", 0xef3014, 0, 64 << 10, 16, ER_4K) }, 316 { INFO("w25x16", 0xef3015, 0, 64 << 10, 32, ER_4K) }, 317 { INFO("w25x32", 0xef3016, 0, 64 << 10, 64, ER_4K) }, 318 { INFO("w25q32", 0xef4016, 0, 64 << 10, 64, ER_4K) }, 319 { INFO("w25q32dw", 0xef6016, 0, 64 << 10, 64, ER_4K) }, 320 { INFO("w25x64", 0xef3017, 0, 64 << 10, 128, ER_4K) }, 321 { INFO("w25q64", 0xef4017, 0, 64 << 10, 128, ER_4K) }, 322 { INFO("w25q80", 0xef5014, 0, 64 << 10, 16, ER_4K) }, 323 { INFO("w25q80bl", 0xef4014, 0, 64 << 10, 16, ER_4K) }, 324 { INFO("w25q256", 0xef4019, 0, 64 << 10, 512, ER_4K) }, 325 { INFO("w25q512jv", 0xef4020, 0, 64 << 10, 1024, ER_4K) }, 326 }; 327 328 typedef enum { 329 NOP = 0, 330 WRSR = 0x1, 331 WRDI = 0x4, 332 RDSR = 0x5, 333 WREN = 0x6, 334 BRRD = 0x16, 335 BRWR = 0x17, 336 JEDEC_READ = 0x9f, 337 BULK_ERASE_60 = 0x60, 338 BULK_ERASE = 0xc7, 339 READ_FSR = 0x70, 340 RDCR = 0x15, 341 342 READ = 0x03, 343 READ4 = 0x13, 344 FAST_READ = 0x0b, 345 FAST_READ4 = 0x0c, 346 DOR = 0x3b, 347 DOR4 = 0x3c, 348 QOR = 0x6b, 349 QOR4 = 0x6c, 350 DIOR = 0xbb, 351 DIOR4 = 0xbc, 352 QIOR = 0xeb, 353 QIOR4 = 0xec, 354 355 PP = 0x02, 356 PP4 = 0x12, 357 PP4_4 = 0x3e, 358 DPP = 0xa2, 359 QPP = 0x32, 360 QPP_4 = 0x34, 361 RDID_90 = 0x90, 362 RDID_AB = 0xab, 363 AAI_WP = 0xad, 364 365 ERASE_4K = 0x20, 366 ERASE4_4K = 0x21, 367 ERASE_32K = 0x52, 368 ERASE4_32K = 0x5c, 369 ERASE_SECTOR = 0xd8, 370 ERASE4_SECTOR = 0xdc, 371 372 EN_4BYTE_ADDR = 0xB7, 373 EX_4BYTE_ADDR = 0xE9, 374 375 EXTEND_ADDR_READ = 0xC8, 376 EXTEND_ADDR_WRITE = 0xC5, 377 378 RESET_ENABLE = 0x66, 379 RESET_MEMORY = 0x99, 380 381 /* 382 * Micron: 0x35 - enable QPI 383 * Spansion: 0x35 - read control register 384 */ 385 RDCR_EQIO = 0x35, 386 RSTQIO = 0xf5, 387 388 RNVCR = 0xB5, 389 WNVCR = 0xB1, 390 391 RVCR = 0x85, 392 WVCR = 0x81, 393 394 REVCR = 0x65, 395 WEVCR = 0x61, 396 397 DIE_ERASE = 0xC4, 398 } FlashCMD; 399 400 typedef enum { 401 STATE_IDLE, 402 STATE_PAGE_PROGRAM, 403 STATE_READ, 404 STATE_COLLECTING_DATA, 405 STATE_COLLECTING_VAR_LEN_DATA, 406 STATE_READING_DATA, 407 } CMDState; 408 409 typedef enum { 410 MAN_SPANSION, 411 MAN_MACRONIX, 412 MAN_NUMONYX, 413 MAN_WINBOND, 414 MAN_SST, 415 MAN_GENERIC, 416 } Manufacturer; 417 418 typedef enum { 419 MODE_STD = 0, 420 MODE_DIO = 1, 421 MODE_QIO = 2 422 } SPIMode; 423 424 #define M25P80_INTERNAL_DATA_BUFFER_SZ 16 425 426 struct Flash { 427 SSIPeripheral parent_obj; 428 429 BlockBackend *blk; 430 431 uint8_t *storage; 432 uint32_t size; 433 int page_size; 434 435 uint8_t state; 436 uint8_t data[M25P80_INTERNAL_DATA_BUFFER_SZ]; 437 uint32_t len; 438 uint32_t pos; 439 bool data_read_loop; 440 uint8_t needed_bytes; 441 uint8_t cmd_in_progress; 442 uint32_t cur_addr; 443 uint32_t nonvolatile_cfg; 444 /* Configuration register for Macronix */ 445 uint32_t volatile_cfg; 446 uint32_t enh_volatile_cfg; 447 /* Spansion cfg registers. */ 448 uint8_t spansion_cr1nv; 449 uint8_t spansion_cr2nv; 450 uint8_t spansion_cr3nv; 451 uint8_t spansion_cr4nv; 452 uint8_t spansion_cr1v; 453 uint8_t spansion_cr2v; 454 uint8_t spansion_cr3v; 455 uint8_t spansion_cr4v; 456 bool write_enable; 457 bool four_bytes_address_mode; 458 bool reset_enable; 459 bool quad_enable; 460 bool aai_enable; 461 uint8_t ear; 462 463 int64_t dirty_page; 464 465 const FlashPartInfo *pi; 466 467 }; 468 469 struct M25P80Class { 470 SSIPeripheralClass parent_class; 471 FlashPartInfo *pi; 472 }; 473 474 #define TYPE_M25P80 "m25p80-generic" 475 OBJECT_DECLARE_TYPE(Flash, M25P80Class, M25P80) 476 477 static inline Manufacturer get_man(Flash *s) 478 { 479 switch (s->pi->id[0]) { 480 case 0x20: 481 return MAN_NUMONYX; 482 case 0xEF: 483 return MAN_WINBOND; 484 case 0x01: 485 return MAN_SPANSION; 486 case 0xC2: 487 return MAN_MACRONIX; 488 case 0xBF: 489 return MAN_SST; 490 default: 491 return MAN_GENERIC; 492 } 493 } 494 495 static void blk_sync_complete(void *opaque, int ret) 496 { 497 QEMUIOVector *iov = opaque; 498 499 qemu_iovec_destroy(iov); 500 g_free(iov); 501 502 /* do nothing. Masters do not directly interact with the backing store, 503 * only the working copy so no mutexing required. 504 */ 505 } 506 507 static void flash_sync_page(Flash *s, int page) 508 { 509 QEMUIOVector *iov; 510 511 if (!s->blk || !blk_is_writable(s->blk)) { 512 return; 513 } 514 515 iov = g_new(QEMUIOVector, 1); 516 qemu_iovec_init(iov, 1); 517 qemu_iovec_add(iov, s->storage + page * s->pi->page_size, 518 s->pi->page_size); 519 blk_aio_pwritev(s->blk, page * s->pi->page_size, iov, 0, 520 blk_sync_complete, iov); 521 } 522 523 static inline void flash_sync_area(Flash *s, int64_t off, int64_t len) 524 { 525 QEMUIOVector *iov; 526 527 if (!s->blk || !blk_is_writable(s->blk)) { 528 return; 529 } 530 531 assert(!(len % BDRV_SECTOR_SIZE)); 532 iov = g_new(QEMUIOVector, 1); 533 qemu_iovec_init(iov, 1); 534 qemu_iovec_add(iov, s->storage + off, len); 535 blk_aio_pwritev(s->blk, off, iov, 0, blk_sync_complete, iov); 536 } 537 538 static void flash_erase(Flash *s, int offset, FlashCMD cmd) 539 { 540 uint32_t len; 541 uint8_t capa_to_assert = 0; 542 543 switch (cmd) { 544 case ERASE_4K: 545 case ERASE4_4K: 546 len = 4 * KiB; 547 capa_to_assert = ER_4K; 548 break; 549 case ERASE_32K: 550 case ERASE4_32K: 551 len = 32 * KiB; 552 capa_to_assert = ER_32K; 553 break; 554 case ERASE_SECTOR: 555 case ERASE4_SECTOR: 556 len = s->pi->sector_size; 557 break; 558 case BULK_ERASE: 559 len = s->size; 560 break; 561 case DIE_ERASE: 562 if (s->pi->die_cnt) { 563 len = s->size / s->pi->die_cnt; 564 offset = offset & (~(len - 1)); 565 } else { 566 qemu_log_mask(LOG_GUEST_ERROR, "M25P80: die erase is not supported" 567 " by device\n"); 568 return; 569 } 570 break; 571 default: 572 abort(); 573 } 574 575 trace_m25p80_flash_erase(s, offset, len); 576 577 if ((s->pi->flags & capa_to_assert) != capa_to_assert) { 578 qemu_log_mask(LOG_GUEST_ERROR, "M25P80: %d erase size not supported by" 579 " device\n", len); 580 } 581 582 if (!s->write_enable) { 583 qemu_log_mask(LOG_GUEST_ERROR, "M25P80: erase with write protect!\n"); 584 return; 585 } 586 memset(s->storage + offset, 0xff, len); 587 flash_sync_area(s, offset, len); 588 } 589 590 static inline void flash_sync_dirty(Flash *s, int64_t newpage) 591 { 592 if (s->dirty_page >= 0 && s->dirty_page != newpage) { 593 flash_sync_page(s, s->dirty_page); 594 s->dirty_page = newpage; 595 } 596 } 597 598 static inline 599 void flash_write8(Flash *s, uint32_t addr, uint8_t data) 600 { 601 uint32_t page = addr / s->pi->page_size; 602 uint8_t prev = s->storage[s->cur_addr]; 603 604 if (!s->write_enable) { 605 qemu_log_mask(LOG_GUEST_ERROR, "M25P80: write with write protect!\n"); 606 return; 607 } 608 609 if ((prev ^ data) & data) { 610 trace_m25p80_programming_zero_to_one(s, addr, prev, data); 611 } 612 613 if (s->pi->flags & EEPROM) { 614 s->storage[s->cur_addr] = data; 615 } else { 616 s->storage[s->cur_addr] &= data; 617 } 618 619 flash_sync_dirty(s, page); 620 s->dirty_page = page; 621 } 622 623 static inline int get_addr_length(Flash *s) 624 { 625 /* check if eeprom is in use */ 626 if (s->pi->flags == EEPROM) { 627 return 2; 628 } 629 630 switch (s->cmd_in_progress) { 631 case PP4: 632 case PP4_4: 633 case QPP_4: 634 case READ4: 635 case QIOR4: 636 case ERASE4_4K: 637 case ERASE4_32K: 638 case ERASE4_SECTOR: 639 case FAST_READ4: 640 case DOR4: 641 case QOR4: 642 case DIOR4: 643 return 4; 644 default: 645 return s->four_bytes_address_mode ? 4 : 3; 646 } 647 } 648 649 static void complete_collecting_data(Flash *s) 650 { 651 int i, n; 652 653 n = get_addr_length(s); 654 s->cur_addr = (n == 3 ? s->ear : 0); 655 for (i = 0; i < n; ++i) { 656 s->cur_addr <<= 8; 657 s->cur_addr |= s->data[i]; 658 } 659 660 s->cur_addr &= s->size - 1; 661 662 s->state = STATE_IDLE; 663 664 trace_m25p80_complete_collecting(s, s->cmd_in_progress, n, s->ear, 665 s->cur_addr); 666 667 switch (s->cmd_in_progress) { 668 case DPP: 669 case QPP: 670 case QPP_4: 671 case PP: 672 case PP4: 673 case PP4_4: 674 s->state = STATE_PAGE_PROGRAM; 675 break; 676 case AAI_WP: 677 /* AAI programming starts from the even address */ 678 s->cur_addr &= ~BIT(0); 679 s->state = STATE_PAGE_PROGRAM; 680 break; 681 case READ: 682 case READ4: 683 case FAST_READ: 684 case FAST_READ4: 685 case DOR: 686 case DOR4: 687 case QOR: 688 case QOR4: 689 case DIOR: 690 case DIOR4: 691 case QIOR: 692 case QIOR4: 693 s->state = STATE_READ; 694 break; 695 case ERASE_4K: 696 case ERASE4_4K: 697 case ERASE_32K: 698 case ERASE4_32K: 699 case ERASE_SECTOR: 700 case ERASE4_SECTOR: 701 case DIE_ERASE: 702 flash_erase(s, s->cur_addr, s->cmd_in_progress); 703 break; 704 case WRSR: 705 switch (get_man(s)) { 706 case MAN_SPANSION: 707 s->quad_enable = !!(s->data[1] & 0x02); 708 break; 709 case MAN_MACRONIX: 710 s->quad_enable = extract32(s->data[0], 6, 1); 711 if (s->len > 1) { 712 s->volatile_cfg = s->data[1]; 713 s->four_bytes_address_mode = extract32(s->data[1], 5, 1); 714 } 715 break; 716 default: 717 break; 718 } 719 if (s->write_enable) { 720 s->write_enable = false; 721 } 722 break; 723 case BRWR: 724 case EXTEND_ADDR_WRITE: 725 s->ear = s->data[0]; 726 break; 727 case WNVCR: 728 s->nonvolatile_cfg = s->data[0] | (s->data[1] << 8); 729 break; 730 case WVCR: 731 s->volatile_cfg = s->data[0]; 732 break; 733 case WEVCR: 734 s->enh_volatile_cfg = s->data[0]; 735 break; 736 case RDID_90: 737 case RDID_AB: 738 if (get_man(s) == MAN_SST) { 739 if (s->cur_addr <= 1) { 740 if (s->cur_addr) { 741 s->data[0] = s->pi->id[2]; 742 s->data[1] = s->pi->id[0]; 743 } else { 744 s->data[0] = s->pi->id[0]; 745 s->data[1] = s->pi->id[2]; 746 } 747 s->pos = 0; 748 s->len = 2; 749 s->data_read_loop = true; 750 s->state = STATE_READING_DATA; 751 } else { 752 qemu_log_mask(LOG_GUEST_ERROR, 753 "M25P80: Invalid read id address\n"); 754 } 755 } else { 756 qemu_log_mask(LOG_GUEST_ERROR, 757 "M25P80: Read id (command 0x90/0xAB) is not supported" 758 " by device\n"); 759 } 760 break; 761 default: 762 break; 763 } 764 } 765 766 static void reset_memory(Flash *s) 767 { 768 s->cmd_in_progress = NOP; 769 s->cur_addr = 0; 770 s->ear = 0; 771 s->four_bytes_address_mode = false; 772 s->len = 0; 773 s->needed_bytes = 0; 774 s->pos = 0; 775 s->state = STATE_IDLE; 776 s->write_enable = false; 777 s->reset_enable = false; 778 s->quad_enable = false; 779 s->aai_enable = false; 780 781 switch (get_man(s)) { 782 case MAN_NUMONYX: 783 s->volatile_cfg = 0; 784 s->volatile_cfg |= VCFG_DUMMY; 785 s->volatile_cfg |= VCFG_WRAP_SEQUENTIAL; 786 if ((s->nonvolatile_cfg & NVCFG_XIP_MODE_MASK) 787 == NVCFG_XIP_MODE_DISABLED) { 788 s->volatile_cfg |= VCFG_XIP_MODE_DISABLED; 789 } 790 s->volatile_cfg |= deposit32(s->volatile_cfg, 791 VCFG_DUMMY_CLK_POS, 792 CFG_DUMMY_CLK_LEN, 793 extract32(s->nonvolatile_cfg, 794 NVCFG_DUMMY_CLK_POS, 795 CFG_DUMMY_CLK_LEN) 796 ); 797 798 s->enh_volatile_cfg = 0; 799 s->enh_volatile_cfg |= EVCFG_OUT_DRIVER_STRENGTH_DEF; 800 s->enh_volatile_cfg |= EVCFG_VPP_ACCELERATOR; 801 s->enh_volatile_cfg |= EVCFG_RESET_HOLD_ENABLED; 802 if (s->nonvolatile_cfg & NVCFG_DUAL_IO_MASK) { 803 s->enh_volatile_cfg |= EVCFG_DUAL_IO_DISABLED; 804 } 805 if (s->nonvolatile_cfg & NVCFG_QUAD_IO_MASK) { 806 s->enh_volatile_cfg |= EVCFG_QUAD_IO_DISABLED; 807 } 808 if (!(s->nonvolatile_cfg & NVCFG_4BYTE_ADDR_MASK)) { 809 s->four_bytes_address_mode = true; 810 } 811 if (!(s->nonvolatile_cfg & NVCFG_LOWER_SEGMENT_MASK)) { 812 s->ear = s->size / MAX_3BYTES_SIZE - 1; 813 } 814 break; 815 case MAN_MACRONIX: 816 s->volatile_cfg = 0x7; 817 break; 818 case MAN_SPANSION: 819 s->spansion_cr1v = s->spansion_cr1nv; 820 s->spansion_cr2v = s->spansion_cr2nv; 821 s->spansion_cr3v = s->spansion_cr3nv; 822 s->spansion_cr4v = s->spansion_cr4nv; 823 s->quad_enable = extract32(s->spansion_cr1v, 824 SPANSION_QUAD_CFG_POS, 825 SPANSION_QUAD_CFG_LEN 826 ); 827 s->four_bytes_address_mode = extract32(s->spansion_cr2v, 828 SPANSION_ADDR_LEN_POS, 829 SPANSION_ADDR_LEN_LEN 830 ); 831 break; 832 default: 833 break; 834 } 835 836 trace_m25p80_reset_done(s); 837 } 838 839 static uint8_t numonyx_mode(Flash *s) 840 { 841 if (!(s->enh_volatile_cfg & EVCFG_QUAD_IO_DISABLED)) { 842 return MODE_QIO; 843 } else if (!(s->enh_volatile_cfg & EVCFG_DUAL_IO_DISABLED)) { 844 return MODE_DIO; 845 } else { 846 return MODE_STD; 847 } 848 } 849 850 static uint8_t numonyx_extract_cfg_num_dummies(Flash *s) 851 { 852 uint8_t num_dummies; 853 uint8_t mode; 854 assert(get_man(s) == MAN_NUMONYX); 855 856 mode = numonyx_mode(s); 857 num_dummies = extract32(s->volatile_cfg, 4, 4); 858 859 if (num_dummies == 0x0 || num_dummies == 0xf) { 860 switch (s->cmd_in_progress) { 861 case QIOR: 862 case QIOR4: 863 num_dummies = 10; 864 break; 865 default: 866 num_dummies = (mode == MODE_QIO) ? 10 : 8; 867 break; 868 } 869 } 870 871 return num_dummies; 872 } 873 874 static void decode_fast_read_cmd(Flash *s) 875 { 876 s->needed_bytes = get_addr_length(s); 877 switch (get_man(s)) { 878 /* Dummy cycles - modeled with bytes writes instead of bits */ 879 case MAN_WINBOND: 880 s->needed_bytes += 8; 881 break; 882 case MAN_NUMONYX: 883 s->needed_bytes += numonyx_extract_cfg_num_dummies(s); 884 break; 885 case MAN_MACRONIX: 886 if (extract32(s->volatile_cfg, 6, 2) == 1) { 887 s->needed_bytes += 6; 888 } else { 889 s->needed_bytes += 8; 890 } 891 break; 892 case MAN_SPANSION: 893 s->needed_bytes += extract32(s->spansion_cr2v, 894 SPANSION_DUMMY_CLK_POS, 895 SPANSION_DUMMY_CLK_LEN 896 ); 897 break; 898 default: 899 break; 900 } 901 s->pos = 0; 902 s->len = 0; 903 s->state = STATE_COLLECTING_DATA; 904 } 905 906 static void decode_dio_read_cmd(Flash *s) 907 { 908 s->needed_bytes = get_addr_length(s); 909 /* Dummy cycles modeled with bytes writes instead of bits */ 910 switch (get_man(s)) { 911 case MAN_WINBOND: 912 s->needed_bytes += WINBOND_CONTINUOUS_READ_MODE_CMD_LEN; 913 break; 914 case MAN_SPANSION: 915 s->needed_bytes += SPANSION_CONTINUOUS_READ_MODE_CMD_LEN; 916 s->needed_bytes += extract32(s->spansion_cr2v, 917 SPANSION_DUMMY_CLK_POS, 918 SPANSION_DUMMY_CLK_LEN 919 ); 920 break; 921 case MAN_NUMONYX: 922 s->needed_bytes += numonyx_extract_cfg_num_dummies(s); 923 break; 924 case MAN_MACRONIX: 925 switch (extract32(s->volatile_cfg, 6, 2)) { 926 case 1: 927 s->needed_bytes += 6; 928 break; 929 case 2: 930 s->needed_bytes += 8; 931 break; 932 default: 933 s->needed_bytes += 4; 934 break; 935 } 936 break; 937 default: 938 break; 939 } 940 s->pos = 0; 941 s->len = 0; 942 s->state = STATE_COLLECTING_DATA; 943 } 944 945 static void decode_qio_read_cmd(Flash *s) 946 { 947 s->needed_bytes = get_addr_length(s); 948 /* Dummy cycles modeled with bytes writes instead of bits */ 949 switch (get_man(s)) { 950 case MAN_WINBOND: 951 s->needed_bytes += WINBOND_CONTINUOUS_READ_MODE_CMD_LEN; 952 s->needed_bytes += 4; 953 break; 954 case MAN_SPANSION: 955 s->needed_bytes += SPANSION_CONTINUOUS_READ_MODE_CMD_LEN; 956 s->needed_bytes += extract32(s->spansion_cr2v, 957 SPANSION_DUMMY_CLK_POS, 958 SPANSION_DUMMY_CLK_LEN 959 ); 960 break; 961 case MAN_NUMONYX: 962 s->needed_bytes += numonyx_extract_cfg_num_dummies(s); 963 break; 964 case MAN_MACRONIX: 965 switch (extract32(s->volatile_cfg, 6, 2)) { 966 case 1: 967 s->needed_bytes += 4; 968 break; 969 case 2: 970 s->needed_bytes += 8; 971 break; 972 default: 973 s->needed_bytes += 6; 974 break; 975 } 976 break; 977 default: 978 break; 979 } 980 s->pos = 0; 981 s->len = 0; 982 s->state = STATE_COLLECTING_DATA; 983 } 984 985 static bool is_valid_aai_cmd(uint32_t cmd) 986 { 987 return cmd == AAI_WP || cmd == WRDI || cmd == RDSR; 988 } 989 990 static void decode_new_cmd(Flash *s, uint32_t value) 991 { 992 int i; 993 994 s->cmd_in_progress = value; 995 trace_m25p80_command_decoded(s, value); 996 997 if (value != RESET_MEMORY) { 998 s->reset_enable = false; 999 } 1000 1001 if (get_man(s) == MAN_SST && s->aai_enable && !is_valid_aai_cmd(value)) { 1002 qemu_log_mask(LOG_GUEST_ERROR, 1003 "M25P80: Invalid cmd within AAI programming sequence"); 1004 } 1005 1006 switch (value) { 1007 1008 case ERASE_4K: 1009 case ERASE4_4K: 1010 case ERASE_32K: 1011 case ERASE4_32K: 1012 case ERASE_SECTOR: 1013 case ERASE4_SECTOR: 1014 case PP: 1015 case PP4: 1016 case DIE_ERASE: 1017 case RDID_90: 1018 case RDID_AB: 1019 s->needed_bytes = get_addr_length(s); 1020 s->pos = 0; 1021 s->len = 0; 1022 s->state = STATE_COLLECTING_DATA; 1023 break; 1024 case READ: 1025 case READ4: 1026 if (get_man(s) != MAN_NUMONYX || numonyx_mode(s) == MODE_STD) { 1027 s->needed_bytes = get_addr_length(s); 1028 s->pos = 0; 1029 s->len = 0; 1030 s->state = STATE_COLLECTING_DATA; 1031 } else { 1032 qemu_log_mask(LOG_GUEST_ERROR, "M25P80: Cannot execute cmd %x in " 1033 "DIO or QIO mode\n", s->cmd_in_progress); 1034 } 1035 break; 1036 case DPP: 1037 if (get_man(s) != MAN_NUMONYX || numonyx_mode(s) != MODE_QIO) { 1038 s->needed_bytes = get_addr_length(s); 1039 s->pos = 0; 1040 s->len = 0; 1041 s->state = STATE_COLLECTING_DATA; 1042 } else { 1043 qemu_log_mask(LOG_GUEST_ERROR, "M25P80: Cannot execute cmd %x in " 1044 "QIO mode\n", s->cmd_in_progress); 1045 } 1046 break; 1047 case QPP: 1048 case QPP_4: 1049 case PP4_4: 1050 if (get_man(s) != MAN_NUMONYX || numonyx_mode(s) != MODE_DIO) { 1051 s->needed_bytes = get_addr_length(s); 1052 s->pos = 0; 1053 s->len = 0; 1054 s->state = STATE_COLLECTING_DATA; 1055 } else { 1056 qemu_log_mask(LOG_GUEST_ERROR, "M25P80: Cannot execute cmd %x in " 1057 "DIO mode\n", s->cmd_in_progress); 1058 } 1059 break; 1060 1061 case FAST_READ: 1062 case FAST_READ4: 1063 decode_fast_read_cmd(s); 1064 break; 1065 case DOR: 1066 case DOR4: 1067 if (get_man(s) != MAN_NUMONYX || numonyx_mode(s) != MODE_QIO) { 1068 decode_fast_read_cmd(s); 1069 } else { 1070 qemu_log_mask(LOG_GUEST_ERROR, "M25P80: Cannot execute cmd %x in " 1071 "QIO mode\n", s->cmd_in_progress); 1072 } 1073 break; 1074 case QOR: 1075 case QOR4: 1076 if (get_man(s) != MAN_NUMONYX || numonyx_mode(s) != MODE_DIO) { 1077 decode_fast_read_cmd(s); 1078 } else { 1079 qemu_log_mask(LOG_GUEST_ERROR, "M25P80: Cannot execute cmd %x in " 1080 "DIO mode\n", s->cmd_in_progress); 1081 } 1082 break; 1083 1084 case DIOR: 1085 case DIOR4: 1086 if (get_man(s) != MAN_NUMONYX || numonyx_mode(s) != MODE_QIO) { 1087 decode_dio_read_cmd(s); 1088 } else { 1089 qemu_log_mask(LOG_GUEST_ERROR, "M25P80: Cannot execute cmd %x in " 1090 "QIO mode\n", s->cmd_in_progress); 1091 } 1092 break; 1093 1094 case QIOR: 1095 case QIOR4: 1096 if (get_man(s) != MAN_NUMONYX || numonyx_mode(s) != MODE_DIO) { 1097 decode_qio_read_cmd(s); 1098 } else { 1099 qemu_log_mask(LOG_GUEST_ERROR, "M25P80: Cannot execute cmd %x in " 1100 "DIO mode\n", s->cmd_in_progress); 1101 } 1102 break; 1103 1104 case WRSR: 1105 if (s->write_enable) { 1106 switch (get_man(s)) { 1107 case MAN_SPANSION: 1108 s->needed_bytes = 2; 1109 s->state = STATE_COLLECTING_DATA; 1110 break; 1111 case MAN_MACRONIX: 1112 s->needed_bytes = 2; 1113 s->state = STATE_COLLECTING_VAR_LEN_DATA; 1114 break; 1115 default: 1116 s->needed_bytes = 1; 1117 s->state = STATE_COLLECTING_DATA; 1118 } 1119 s->pos = 0; 1120 } 1121 break; 1122 1123 case WRDI: 1124 s->write_enable = false; 1125 if (get_man(s) == MAN_SST) { 1126 s->aai_enable = false; 1127 } 1128 break; 1129 case WREN: 1130 s->write_enable = true; 1131 break; 1132 1133 case RDSR: 1134 s->data[0] = (!!s->write_enable) << 1; 1135 if (get_man(s) == MAN_MACRONIX) { 1136 s->data[0] |= (!!s->quad_enable) << 6; 1137 } 1138 if (get_man(s) == MAN_SST) { 1139 s->data[0] |= (!!s->aai_enable) << 6; 1140 } 1141 1142 s->pos = 0; 1143 s->len = 1; 1144 s->data_read_loop = true; 1145 s->state = STATE_READING_DATA; 1146 break; 1147 1148 case READ_FSR: 1149 s->data[0] = FSR_FLASH_READY; 1150 if (s->four_bytes_address_mode) { 1151 s->data[0] |= FSR_4BYTE_ADDR_MODE_ENABLED; 1152 } 1153 s->pos = 0; 1154 s->len = 1; 1155 s->data_read_loop = true; 1156 s->state = STATE_READING_DATA; 1157 break; 1158 1159 case JEDEC_READ: 1160 if (get_man(s) != MAN_NUMONYX || numonyx_mode(s) == MODE_STD) { 1161 trace_m25p80_populated_jedec(s); 1162 for (i = 0; i < s->pi->id_len; i++) { 1163 s->data[i] = s->pi->id[i]; 1164 } 1165 for (; i < SPI_NOR_MAX_ID_LEN; i++) { 1166 s->data[i] = 0; 1167 } 1168 1169 s->len = SPI_NOR_MAX_ID_LEN; 1170 s->pos = 0; 1171 s->state = STATE_READING_DATA; 1172 } else { 1173 qemu_log_mask(LOG_GUEST_ERROR, "M25P80: Cannot execute JEDEC read " 1174 "in DIO or QIO mode\n"); 1175 } 1176 break; 1177 1178 case RDCR: 1179 s->data[0] = s->volatile_cfg & 0xFF; 1180 s->data[0] |= (!!s->four_bytes_address_mode) << 5; 1181 s->pos = 0; 1182 s->len = 1; 1183 s->state = STATE_READING_DATA; 1184 break; 1185 1186 case BULK_ERASE_60: 1187 case BULK_ERASE: 1188 if (s->write_enable) { 1189 trace_m25p80_chip_erase(s); 1190 flash_erase(s, 0, BULK_ERASE); 1191 } else { 1192 qemu_log_mask(LOG_GUEST_ERROR, "M25P80: chip erase with write " 1193 "protect!\n"); 1194 } 1195 break; 1196 case NOP: 1197 break; 1198 case EN_4BYTE_ADDR: 1199 s->four_bytes_address_mode = true; 1200 break; 1201 case EX_4BYTE_ADDR: 1202 s->four_bytes_address_mode = false; 1203 break; 1204 case BRRD: 1205 case EXTEND_ADDR_READ: 1206 s->data[0] = s->ear; 1207 s->pos = 0; 1208 s->len = 1; 1209 s->state = STATE_READING_DATA; 1210 break; 1211 case BRWR: 1212 case EXTEND_ADDR_WRITE: 1213 if (s->write_enable) { 1214 s->needed_bytes = 1; 1215 s->pos = 0; 1216 s->len = 0; 1217 s->state = STATE_COLLECTING_DATA; 1218 } 1219 break; 1220 case RNVCR: 1221 s->data[0] = s->nonvolatile_cfg & 0xFF; 1222 s->data[1] = (s->nonvolatile_cfg >> 8) & 0xFF; 1223 s->pos = 0; 1224 s->len = 2; 1225 s->state = STATE_READING_DATA; 1226 break; 1227 case WNVCR: 1228 if (s->write_enable && get_man(s) == MAN_NUMONYX) { 1229 s->needed_bytes = 2; 1230 s->pos = 0; 1231 s->len = 0; 1232 s->state = STATE_COLLECTING_DATA; 1233 } 1234 break; 1235 case RVCR: 1236 s->data[0] = s->volatile_cfg & 0xFF; 1237 s->pos = 0; 1238 s->len = 1; 1239 s->state = STATE_READING_DATA; 1240 break; 1241 case WVCR: 1242 if (s->write_enable) { 1243 s->needed_bytes = 1; 1244 s->pos = 0; 1245 s->len = 0; 1246 s->state = STATE_COLLECTING_DATA; 1247 } 1248 break; 1249 case REVCR: 1250 s->data[0] = s->enh_volatile_cfg & 0xFF; 1251 s->pos = 0; 1252 s->len = 1; 1253 s->state = STATE_READING_DATA; 1254 break; 1255 case WEVCR: 1256 if (s->write_enable) { 1257 s->needed_bytes = 1; 1258 s->pos = 0; 1259 s->len = 0; 1260 s->state = STATE_COLLECTING_DATA; 1261 } 1262 break; 1263 case RESET_ENABLE: 1264 s->reset_enable = true; 1265 break; 1266 case RESET_MEMORY: 1267 if (s->reset_enable) { 1268 reset_memory(s); 1269 } 1270 break; 1271 case RDCR_EQIO: 1272 switch (get_man(s)) { 1273 case MAN_SPANSION: 1274 s->data[0] = (!!s->quad_enable) << 1; 1275 s->pos = 0; 1276 s->len = 1; 1277 s->state = STATE_READING_DATA; 1278 break; 1279 case MAN_MACRONIX: 1280 s->quad_enable = true; 1281 break; 1282 default: 1283 break; 1284 } 1285 break; 1286 case RSTQIO: 1287 s->quad_enable = false; 1288 break; 1289 case AAI_WP: 1290 if (get_man(s) == MAN_SST) { 1291 if (s->write_enable) { 1292 if (s->aai_enable) { 1293 s->state = STATE_PAGE_PROGRAM; 1294 } else { 1295 s->aai_enable = true; 1296 s->needed_bytes = get_addr_length(s); 1297 s->state = STATE_COLLECTING_DATA; 1298 } 1299 } else { 1300 qemu_log_mask(LOG_GUEST_ERROR, 1301 "M25P80: AAI_WP with write protect\n"); 1302 } 1303 } else { 1304 qemu_log_mask(LOG_GUEST_ERROR, "M25P80: Unknown cmd %x\n", value); 1305 } 1306 break; 1307 default: 1308 s->pos = 0; 1309 s->len = 1; 1310 s->state = STATE_READING_DATA; 1311 s->data_read_loop = true; 1312 s->data[0] = 0; 1313 qemu_log_mask(LOG_GUEST_ERROR, "M25P80: Unknown cmd %x\n", value); 1314 break; 1315 } 1316 } 1317 1318 static int m25p80_cs(SSIPeripheral *ss, bool select) 1319 { 1320 Flash *s = M25P80(ss); 1321 1322 if (select) { 1323 if (s->state == STATE_COLLECTING_VAR_LEN_DATA) { 1324 complete_collecting_data(s); 1325 } 1326 s->len = 0; 1327 s->pos = 0; 1328 s->state = STATE_IDLE; 1329 flash_sync_dirty(s, -1); 1330 s->data_read_loop = false; 1331 } 1332 1333 trace_m25p80_select(s, select ? "de" : ""); 1334 1335 return 0; 1336 } 1337 1338 static uint32_t m25p80_transfer8(SSIPeripheral *ss, uint32_t tx) 1339 { 1340 Flash *s = M25P80(ss); 1341 uint32_t r = 0; 1342 1343 trace_m25p80_transfer(s, s->state, s->len, s->needed_bytes, s->pos, 1344 s->cur_addr, (uint8_t)tx); 1345 1346 switch (s->state) { 1347 1348 case STATE_PAGE_PROGRAM: 1349 trace_m25p80_page_program(s, s->cur_addr, (uint8_t)tx); 1350 flash_write8(s, s->cur_addr, (uint8_t)tx); 1351 s->cur_addr = (s->cur_addr + 1) & (s->size - 1); 1352 1353 if (get_man(s) == MAN_SST && s->aai_enable && s->cur_addr == 0) { 1354 /* 1355 * There is no wrap mode during AAI programming once the highest 1356 * unprotected memory address is reached. The Write-Enable-Latch 1357 * bit is automatically reset, and AAI programming mode aborts. 1358 */ 1359 s->write_enable = false; 1360 s->aai_enable = false; 1361 } 1362 1363 break; 1364 1365 case STATE_READ: 1366 r = s->storage[s->cur_addr]; 1367 trace_m25p80_read_byte(s, s->cur_addr, (uint8_t)r); 1368 s->cur_addr = (s->cur_addr + 1) & (s->size - 1); 1369 break; 1370 1371 case STATE_COLLECTING_DATA: 1372 case STATE_COLLECTING_VAR_LEN_DATA: 1373 1374 if (s->len >= M25P80_INTERNAL_DATA_BUFFER_SZ) { 1375 qemu_log_mask(LOG_GUEST_ERROR, 1376 "M25P80: Write overrun internal data buffer. " 1377 "SPI controller (QEMU emulator or guest driver) " 1378 "is misbehaving\n"); 1379 s->len = s->pos = 0; 1380 s->state = STATE_IDLE; 1381 break; 1382 } 1383 1384 s->data[s->len] = (uint8_t)tx; 1385 s->len++; 1386 1387 if (s->len == s->needed_bytes) { 1388 complete_collecting_data(s); 1389 } 1390 break; 1391 1392 case STATE_READING_DATA: 1393 1394 if (s->pos >= M25P80_INTERNAL_DATA_BUFFER_SZ) { 1395 qemu_log_mask(LOG_GUEST_ERROR, 1396 "M25P80: Read overrun internal data buffer. " 1397 "SPI controller (QEMU emulator or guest driver) " 1398 "is misbehaving\n"); 1399 s->len = s->pos = 0; 1400 s->state = STATE_IDLE; 1401 break; 1402 } 1403 1404 r = s->data[s->pos]; 1405 trace_m25p80_read_data(s, s->pos, (uint8_t)r); 1406 s->pos++; 1407 if (s->pos == s->len) { 1408 s->pos = 0; 1409 if (!s->data_read_loop) { 1410 s->state = STATE_IDLE; 1411 } 1412 } 1413 break; 1414 1415 default: 1416 case STATE_IDLE: 1417 decode_new_cmd(s, (uint8_t)tx); 1418 break; 1419 } 1420 1421 return r; 1422 } 1423 1424 static void m25p80_realize(SSIPeripheral *ss, Error **errp) 1425 { 1426 Flash *s = M25P80(ss); 1427 M25P80Class *mc = M25P80_GET_CLASS(s); 1428 int ret; 1429 1430 s->pi = mc->pi; 1431 1432 s->size = s->pi->sector_size * s->pi->n_sectors; 1433 s->dirty_page = -1; 1434 1435 if (s->blk) { 1436 uint64_t perm = BLK_PERM_CONSISTENT_READ | 1437 (blk_supports_write_perm(s->blk) ? BLK_PERM_WRITE : 0); 1438 ret = blk_set_perm(s->blk, perm, BLK_PERM_ALL, errp); 1439 if (ret < 0) { 1440 return; 1441 } 1442 1443 trace_m25p80_binding(s); 1444 s->storage = blk_blockalign(s->blk, s->size); 1445 1446 if (blk_pread(s->blk, 0, s->storage, s->size) != s->size) { 1447 error_setg(errp, "failed to read the initial flash content"); 1448 return; 1449 } 1450 } else { 1451 trace_m25p80_binding_no_bdrv(s); 1452 s->storage = blk_blockalign(NULL, s->size); 1453 memset(s->storage, 0xFF, s->size); 1454 } 1455 } 1456 1457 static void m25p80_reset(DeviceState *d) 1458 { 1459 Flash *s = M25P80(d); 1460 1461 reset_memory(s); 1462 } 1463 1464 static int m25p80_pre_save(void *opaque) 1465 { 1466 flash_sync_dirty((Flash *)opaque, -1); 1467 1468 return 0; 1469 } 1470 1471 static Property m25p80_properties[] = { 1472 /* This is default value for Micron flash */ 1473 DEFINE_PROP_UINT32("nonvolatile-cfg", Flash, nonvolatile_cfg, 0x8FFF), 1474 DEFINE_PROP_UINT8("spansion-cr1nv", Flash, spansion_cr1nv, 0x0), 1475 DEFINE_PROP_UINT8("spansion-cr2nv", Flash, spansion_cr2nv, 0x8), 1476 DEFINE_PROP_UINT8("spansion-cr3nv", Flash, spansion_cr3nv, 0x2), 1477 DEFINE_PROP_UINT8("spansion-cr4nv", Flash, spansion_cr4nv, 0x10), 1478 DEFINE_PROP_DRIVE("drive", Flash, blk), 1479 DEFINE_PROP_END_OF_LIST(), 1480 }; 1481 1482 static int m25p80_pre_load(void *opaque) 1483 { 1484 Flash *s = (Flash *)opaque; 1485 1486 s->data_read_loop = false; 1487 return 0; 1488 } 1489 1490 static bool m25p80_data_read_loop_needed(void *opaque) 1491 { 1492 Flash *s = (Flash *)opaque; 1493 1494 return s->data_read_loop; 1495 } 1496 1497 static const VMStateDescription vmstate_m25p80_data_read_loop = { 1498 .name = "m25p80/data_read_loop", 1499 .version_id = 1, 1500 .minimum_version_id = 1, 1501 .needed = m25p80_data_read_loop_needed, 1502 .fields = (VMStateField[]) { 1503 VMSTATE_BOOL(data_read_loop, Flash), 1504 VMSTATE_END_OF_LIST() 1505 } 1506 }; 1507 1508 static bool m25p80_aai_enable_needed(void *opaque) 1509 { 1510 Flash *s = (Flash *)opaque; 1511 1512 return s->aai_enable; 1513 } 1514 1515 static const VMStateDescription vmstate_m25p80_aai_enable = { 1516 .name = "m25p80/aai_enable", 1517 .version_id = 1, 1518 .minimum_version_id = 1, 1519 .needed = m25p80_aai_enable_needed, 1520 .fields = (VMStateField[]) { 1521 VMSTATE_BOOL(aai_enable, Flash), 1522 VMSTATE_END_OF_LIST() 1523 } 1524 }; 1525 1526 static const VMStateDescription vmstate_m25p80 = { 1527 .name = "m25p80", 1528 .version_id = 0, 1529 .minimum_version_id = 0, 1530 .pre_save = m25p80_pre_save, 1531 .pre_load = m25p80_pre_load, 1532 .fields = (VMStateField[]) { 1533 VMSTATE_UINT8(state, Flash), 1534 VMSTATE_UINT8_ARRAY(data, Flash, M25P80_INTERNAL_DATA_BUFFER_SZ), 1535 VMSTATE_UINT32(len, Flash), 1536 VMSTATE_UINT32(pos, Flash), 1537 VMSTATE_UINT8(needed_bytes, Flash), 1538 VMSTATE_UINT8(cmd_in_progress, Flash), 1539 VMSTATE_UINT32(cur_addr, Flash), 1540 VMSTATE_BOOL(write_enable, Flash), 1541 VMSTATE_BOOL(reset_enable, Flash), 1542 VMSTATE_UINT8(ear, Flash), 1543 VMSTATE_BOOL(four_bytes_address_mode, Flash), 1544 VMSTATE_UINT32(nonvolatile_cfg, Flash), 1545 VMSTATE_UINT32(volatile_cfg, Flash), 1546 VMSTATE_UINT32(enh_volatile_cfg, Flash), 1547 VMSTATE_BOOL(quad_enable, Flash), 1548 VMSTATE_UINT8(spansion_cr1nv, Flash), 1549 VMSTATE_UINT8(spansion_cr2nv, Flash), 1550 VMSTATE_UINT8(spansion_cr3nv, Flash), 1551 VMSTATE_UINT8(spansion_cr4nv, Flash), 1552 VMSTATE_END_OF_LIST() 1553 }, 1554 .subsections = (const VMStateDescription * []) { 1555 &vmstate_m25p80_data_read_loop, 1556 &vmstate_m25p80_aai_enable, 1557 NULL 1558 } 1559 }; 1560 1561 static void m25p80_class_init(ObjectClass *klass, void *data) 1562 { 1563 DeviceClass *dc = DEVICE_CLASS(klass); 1564 SSIPeripheralClass *k = SSI_PERIPHERAL_CLASS(klass); 1565 M25P80Class *mc = M25P80_CLASS(klass); 1566 1567 k->realize = m25p80_realize; 1568 k->transfer = m25p80_transfer8; 1569 k->set_cs = m25p80_cs; 1570 k->cs_polarity = SSI_CS_LOW; 1571 dc->vmsd = &vmstate_m25p80; 1572 device_class_set_props(dc, m25p80_properties); 1573 dc->reset = m25p80_reset; 1574 mc->pi = data; 1575 } 1576 1577 static const TypeInfo m25p80_info = { 1578 .name = TYPE_M25P80, 1579 .parent = TYPE_SSI_PERIPHERAL, 1580 .instance_size = sizeof(Flash), 1581 .class_size = sizeof(M25P80Class), 1582 .abstract = true, 1583 }; 1584 1585 static void m25p80_register_types(void) 1586 { 1587 int i; 1588 1589 type_register_static(&m25p80_info); 1590 for (i = 0; i < ARRAY_SIZE(known_devices); ++i) { 1591 TypeInfo ti = { 1592 .name = known_devices[i].part_name, 1593 .parent = TYPE_M25P80, 1594 .class_init = m25p80_class_init, 1595 .class_data = (void *)&known_devices[i], 1596 }; 1597 type_register(&ti); 1598 } 1599 } 1600 1601 type_init(m25p80_register_types) 1602