1 /* 2 * QEMU model of the Xilinx Zynq SPI controller 3 * 4 * Copyright (c) 2012 Peter A. G. Crosthwaite 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a copy 7 * of this software and associated documentation files (the "Software"), to deal 8 * in the Software without restriction, including without limitation the rights 9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 10 * copies of the Software, and to permit persons to whom the Software is 11 * furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 22 * THE SOFTWARE. 23 */ 24 25 #include "qemu/osdep.h" 26 #include "hw/sysbus.h" 27 #include "sysemu/sysemu.h" 28 #include "hw/ptimer.h" 29 #include "qemu/log.h" 30 #include "qemu/bitops.h" 31 #include "hw/ssi/xilinx_spips.h" 32 #include "qapi/error.h" 33 #include "hw/register.h" 34 #include "sysemu/dma.h" 35 #include "migration/blocker.h" 36 37 #ifndef XILINX_SPIPS_ERR_DEBUG 38 #define XILINX_SPIPS_ERR_DEBUG 0 39 #endif 40 41 #define DB_PRINT_L(level, ...) do { \ 42 if (XILINX_SPIPS_ERR_DEBUG > (level)) { \ 43 fprintf(stderr, ": %s: ", __func__); \ 44 fprintf(stderr, ## __VA_ARGS__); \ 45 } \ 46 } while (0) 47 48 /* config register */ 49 #define R_CONFIG (0x00 / 4) 50 #define IFMODE (1U << 31) 51 #define R_CONFIG_ENDIAN (1 << 26) 52 #define MODEFAIL_GEN_EN (1 << 17) 53 #define MAN_START_COM (1 << 16) 54 #define MAN_START_EN (1 << 15) 55 #define MANUAL_CS (1 << 14) 56 #define CS (0xF << 10) 57 #define CS_SHIFT (10) 58 #define PERI_SEL (1 << 9) 59 #define REF_CLK (1 << 8) 60 #define FIFO_WIDTH (3 << 6) 61 #define BAUD_RATE_DIV (7 << 3) 62 #define CLK_PH (1 << 2) 63 #define CLK_POL (1 << 1) 64 #define MODE_SEL (1 << 0) 65 #define R_CONFIG_RSVD (0x7bf40000) 66 67 /* interrupt mechanism */ 68 #define R_INTR_STATUS (0x04 / 4) 69 #define R_INTR_STATUS_RESET (0x104) 70 #define R_INTR_EN (0x08 / 4) 71 #define R_INTR_DIS (0x0C / 4) 72 #define R_INTR_MASK (0x10 / 4) 73 #define IXR_TX_FIFO_UNDERFLOW (1 << 6) 74 /* Poll timeout not implemented */ 75 #define IXR_RX_FIFO_EMPTY (1 << 11) 76 #define IXR_GENERIC_FIFO_FULL (1 << 10) 77 #define IXR_GENERIC_FIFO_NOT_FULL (1 << 9) 78 #define IXR_TX_FIFO_EMPTY (1 << 8) 79 #define IXR_GENERIC_FIFO_EMPTY (1 << 7) 80 #define IXR_RX_FIFO_FULL (1 << 5) 81 #define IXR_RX_FIFO_NOT_EMPTY (1 << 4) 82 #define IXR_TX_FIFO_FULL (1 << 3) 83 #define IXR_TX_FIFO_NOT_FULL (1 << 2) 84 #define IXR_TX_FIFO_MODE_FAIL (1 << 1) 85 #define IXR_RX_FIFO_OVERFLOW (1 << 0) 86 #define IXR_ALL ((1 << 13) - 1) 87 #define GQSPI_IXR_MASK 0xFBE 88 #define IXR_SELF_CLEAR \ 89 (IXR_GENERIC_FIFO_EMPTY \ 90 | IXR_GENERIC_FIFO_FULL \ 91 | IXR_GENERIC_FIFO_NOT_FULL \ 92 | IXR_TX_FIFO_EMPTY \ 93 | IXR_TX_FIFO_FULL \ 94 | IXR_TX_FIFO_NOT_FULL \ 95 | IXR_RX_FIFO_EMPTY \ 96 | IXR_RX_FIFO_FULL \ 97 | IXR_RX_FIFO_NOT_EMPTY) 98 99 #define R_EN (0x14 / 4) 100 #define R_DELAY (0x18 / 4) 101 #define R_TX_DATA (0x1C / 4) 102 #define R_RX_DATA (0x20 / 4) 103 #define R_SLAVE_IDLE_COUNT (0x24 / 4) 104 #define R_TX_THRES (0x28 / 4) 105 #define R_RX_THRES (0x2C / 4) 106 #define R_GPIO (0x30 / 4) 107 #define R_LPBK_DLY_ADJ (0x38 / 4) 108 #define R_LPBK_DLY_ADJ_RESET (0x33) 109 #define R_TXD1 (0x80 / 4) 110 #define R_TXD2 (0x84 / 4) 111 #define R_TXD3 (0x88 / 4) 112 113 #define R_LQSPI_CFG (0xa0 / 4) 114 #define R_LQSPI_CFG_RESET 0x03A002EB 115 #define LQSPI_CFG_LQ_MODE (1U << 31) 116 #define LQSPI_CFG_TWO_MEM (1 << 30) 117 #define LQSPI_CFG_SEP_BUS (1 << 29) 118 #define LQSPI_CFG_U_PAGE (1 << 28) 119 #define LQSPI_CFG_ADDR4 (1 << 27) 120 #define LQSPI_CFG_MODE_EN (1 << 25) 121 #define LQSPI_CFG_MODE_WIDTH 8 122 #define LQSPI_CFG_MODE_SHIFT 16 123 #define LQSPI_CFG_DUMMY_WIDTH 3 124 #define LQSPI_CFG_DUMMY_SHIFT 8 125 #define LQSPI_CFG_INST_CODE 0xFF 126 127 #define R_CMND (0xc0 / 4) 128 #define R_CMND_RXFIFO_DRAIN (1 << 19) 129 FIELD(CMND, PARTIAL_BYTE_LEN, 16, 3) 130 #define R_CMND_EXT_ADD (1 << 15) 131 FIELD(CMND, RX_DISCARD, 8, 7) 132 FIELD(CMND, DUMMY_CYCLES, 2, 6) 133 #define R_CMND_DMA_EN (1 << 1) 134 #define R_CMND_PUSH_WAIT (1 << 0) 135 #define R_TRANSFER_SIZE (0xc4 / 4) 136 #define R_LQSPI_STS (0xA4 / 4) 137 #define LQSPI_STS_WR_RECVD (1 << 1) 138 139 #define R_MOD_ID (0xFC / 4) 140 141 #define R_GQSPI_SELECT (0x144 / 4) 142 FIELD(GQSPI_SELECT, GENERIC_QSPI_EN, 0, 1) 143 #define R_GQSPI_ISR (0x104 / 4) 144 #define R_GQSPI_IER (0x108 / 4) 145 #define R_GQSPI_IDR (0x10c / 4) 146 #define R_GQSPI_IMR (0x110 / 4) 147 #define R_GQSPI_IMR_RESET (0xfbe) 148 #define R_GQSPI_TX_THRESH (0x128 / 4) 149 #define R_GQSPI_RX_THRESH (0x12c / 4) 150 #define R_GQSPI_GPIO (0x130 / 4) 151 #define R_GQSPI_LPBK_DLY_ADJ (0x138 / 4) 152 #define R_GQSPI_LPBK_DLY_ADJ_RESET (0x33) 153 #define R_GQSPI_CNFG (0x100 / 4) 154 FIELD(GQSPI_CNFG, MODE_EN, 30, 2) 155 FIELD(GQSPI_CNFG, GEN_FIFO_START_MODE, 29, 1) 156 FIELD(GQSPI_CNFG, GEN_FIFO_START, 28, 1) 157 FIELD(GQSPI_CNFG, ENDIAN, 26, 1) 158 /* Poll timeout not implemented */ 159 FIELD(GQSPI_CNFG, EN_POLL_TIMEOUT, 20, 1) 160 /* QEMU doesnt care about any of these last three */ 161 FIELD(GQSPI_CNFG, BR, 3, 3) 162 FIELD(GQSPI_CNFG, CPH, 2, 1) 163 FIELD(GQSPI_CNFG, CPL, 1, 1) 164 #define R_GQSPI_GEN_FIFO (0x140 / 4) 165 #define R_GQSPI_TXD (0x11c / 4) 166 #define R_GQSPI_RXD (0x120 / 4) 167 #define R_GQSPI_FIFO_CTRL (0x14c / 4) 168 FIELD(GQSPI_FIFO_CTRL, RX_FIFO_RESET, 2, 1) 169 FIELD(GQSPI_FIFO_CTRL, TX_FIFO_RESET, 1, 1) 170 FIELD(GQSPI_FIFO_CTRL, GENERIC_FIFO_RESET, 0, 1) 171 #define R_GQSPI_GFIFO_THRESH (0x150 / 4) 172 #define R_GQSPI_DATA_STS (0x15c / 4) 173 /* We use the snapshot register to hold the core state for the currently 174 * or most recently executed command. So the generic fifo format is defined 175 * for the snapshot register 176 */ 177 #define R_GQSPI_GF_SNAPSHOT (0x160 / 4) 178 FIELD(GQSPI_GF_SNAPSHOT, POLL, 19, 1) 179 FIELD(GQSPI_GF_SNAPSHOT, STRIPE, 18, 1) 180 FIELD(GQSPI_GF_SNAPSHOT, RECIEVE, 17, 1) 181 FIELD(GQSPI_GF_SNAPSHOT, TRANSMIT, 16, 1) 182 FIELD(GQSPI_GF_SNAPSHOT, DATA_BUS_SELECT, 14, 2) 183 FIELD(GQSPI_GF_SNAPSHOT, CHIP_SELECT, 12, 2) 184 FIELD(GQSPI_GF_SNAPSHOT, SPI_MODE, 10, 2) 185 FIELD(GQSPI_GF_SNAPSHOT, EXPONENT, 9, 1) 186 FIELD(GQSPI_GF_SNAPSHOT, DATA_XFER, 8, 1) 187 FIELD(GQSPI_GF_SNAPSHOT, IMMEDIATE_DATA, 0, 8) 188 #define R_GQSPI_MOD_ID (0x1fc / 4) 189 #define R_GQSPI_MOD_ID_RESET (0x10a0000) 190 191 #define R_QSPIDMA_DST_CTRL (0x80c / 4) 192 #define R_QSPIDMA_DST_CTRL_RESET (0x803ffa00) 193 #define R_QSPIDMA_DST_I_MASK (0x820 / 4) 194 #define R_QSPIDMA_DST_I_MASK_RESET (0xfe) 195 #define R_QSPIDMA_DST_CTRL2 (0x824 / 4) 196 #define R_QSPIDMA_DST_CTRL2_RESET (0x081bfff8) 197 198 /* size of TXRX FIFOs */ 199 #define RXFF_A (128) 200 #define TXFF_A (128) 201 202 #define RXFF_A_Q (64 * 4) 203 #define TXFF_A_Q (64 * 4) 204 205 /* 16MB per linear region */ 206 #define LQSPI_ADDRESS_BITS 24 207 208 #define SNOOP_CHECKING 0xFF 209 #define SNOOP_ADDR 0xF0 210 #define SNOOP_NONE 0xEE 211 #define SNOOP_STRIPING 0 212 213 #define MIN_NUM_BUSSES 1 214 #define MAX_NUM_BUSSES 2 215 216 static inline int num_effective_busses(XilinxSPIPS *s) 217 { 218 return (s->regs[R_LQSPI_CFG] & LQSPI_CFG_SEP_BUS && 219 s->regs[R_LQSPI_CFG] & LQSPI_CFG_TWO_MEM) ? s->num_busses : 1; 220 } 221 222 static void xilinx_spips_update_cs(XilinxSPIPS *s, int field) 223 { 224 int i; 225 226 for (i = 0; i < s->num_cs * s->num_busses; i++) { 227 bool old_state = s->cs_lines_state[i]; 228 bool new_state = field & (1 << i); 229 230 if (old_state != new_state) { 231 s->cs_lines_state[i] = new_state; 232 s->rx_discard = ARRAY_FIELD_EX32(s->regs, CMND, RX_DISCARD); 233 DB_PRINT_L(1, "%sselecting slave %d\n", new_state ? "" : "de", i); 234 } 235 qemu_set_irq(s->cs_lines[i], !new_state); 236 } 237 if (!(field & ((1 << (s->num_cs * s->num_busses)) - 1))) { 238 s->snoop_state = SNOOP_CHECKING; 239 s->cmd_dummies = 0; 240 s->link_state = 1; 241 s->link_state_next = 1; 242 s->link_state_next_when = 0; 243 DB_PRINT_L(1, "moving to snoop check state\n"); 244 } 245 } 246 247 static void xlnx_zynqmp_qspips_update_cs_lines(XlnxZynqMPQSPIPS *s) 248 { 249 if (s->regs[R_GQSPI_GF_SNAPSHOT]) { 250 int field = ARRAY_FIELD_EX32(s->regs, GQSPI_GF_SNAPSHOT, CHIP_SELECT); 251 bool upper_cs_sel = field & (1 << 1); 252 bool lower_cs_sel = field & 1; 253 bool bus0_enabled; 254 bool bus1_enabled; 255 uint8_t buses; 256 int cs = 0; 257 258 buses = ARRAY_FIELD_EX32(s->regs, GQSPI_GF_SNAPSHOT, DATA_BUS_SELECT); 259 bus0_enabled = buses & 1; 260 bus1_enabled = buses & (1 << 1); 261 262 if (bus0_enabled && bus1_enabled) { 263 if (lower_cs_sel) { 264 cs |= 1; 265 } 266 if (upper_cs_sel) { 267 cs |= 1 << 3; 268 } 269 } else if (bus0_enabled) { 270 if (lower_cs_sel) { 271 cs |= 1; 272 } 273 if (upper_cs_sel) { 274 cs |= 1 << 1; 275 } 276 } else if (bus1_enabled) { 277 if (lower_cs_sel) { 278 cs |= 1 << 2; 279 } 280 if (upper_cs_sel) { 281 cs |= 1 << 3; 282 } 283 } 284 xilinx_spips_update_cs(XILINX_SPIPS(s), cs); 285 } 286 } 287 288 static void xilinx_spips_update_cs_lines(XilinxSPIPS *s) 289 { 290 int field = ~((s->regs[R_CONFIG] & CS) >> CS_SHIFT); 291 292 /* In dual parallel, mirror low CS to both */ 293 if (num_effective_busses(s) == 2) { 294 /* Single bit chip-select for qspi */ 295 field &= 0x1; 296 field |= field << 3; 297 /* Dual stack U-Page */ 298 } else if (s->regs[R_LQSPI_CFG] & LQSPI_CFG_TWO_MEM && 299 s->regs[R_LQSPI_STS] & LQSPI_CFG_U_PAGE) { 300 /* Single bit chip-select for qspi */ 301 field &= 0x1; 302 /* change from CS0 to CS1 */ 303 field <<= 1; 304 } 305 /* Auto CS */ 306 if (!(s->regs[R_CONFIG] & MANUAL_CS) && 307 fifo8_is_empty(&s->tx_fifo)) { 308 field = 0; 309 } 310 xilinx_spips_update_cs(s, field); 311 } 312 313 static void xilinx_spips_update_ixr(XilinxSPIPS *s) 314 { 315 if (!(s->regs[R_LQSPI_CFG] & LQSPI_CFG_LQ_MODE)) { 316 s->regs[R_INTR_STATUS] &= ~IXR_SELF_CLEAR; 317 s->regs[R_INTR_STATUS] |= 318 (fifo8_is_full(&s->rx_fifo) ? IXR_RX_FIFO_FULL : 0) | 319 (s->rx_fifo.num >= s->regs[R_RX_THRES] ? 320 IXR_RX_FIFO_NOT_EMPTY : 0) | 321 (fifo8_is_full(&s->tx_fifo) ? IXR_TX_FIFO_FULL : 0) | 322 (fifo8_is_empty(&s->tx_fifo) ? IXR_TX_FIFO_EMPTY : 0) | 323 (s->tx_fifo.num < s->regs[R_TX_THRES] ? IXR_TX_FIFO_NOT_FULL : 0); 324 } 325 int new_irqline = !!(s->regs[R_INTR_MASK] & s->regs[R_INTR_STATUS] & 326 IXR_ALL); 327 if (new_irqline != s->irqline) { 328 s->irqline = new_irqline; 329 qemu_set_irq(s->irq, s->irqline); 330 } 331 } 332 333 static void xlnx_zynqmp_qspips_update_ixr(XlnxZynqMPQSPIPS *s) 334 { 335 uint32_t gqspi_int; 336 int new_irqline; 337 338 s->regs[R_GQSPI_ISR] &= ~IXR_SELF_CLEAR; 339 s->regs[R_GQSPI_ISR] |= 340 (fifo32_is_empty(&s->fifo_g) ? IXR_GENERIC_FIFO_EMPTY : 0) | 341 (fifo32_is_full(&s->fifo_g) ? IXR_GENERIC_FIFO_FULL : 0) | 342 (s->fifo_g.fifo.num < s->regs[R_GQSPI_GFIFO_THRESH] ? 343 IXR_GENERIC_FIFO_NOT_FULL : 0) | 344 (fifo8_is_empty(&s->rx_fifo_g) ? IXR_RX_FIFO_EMPTY : 0) | 345 (fifo8_is_full(&s->rx_fifo_g) ? IXR_RX_FIFO_FULL : 0) | 346 (s->rx_fifo_g.num >= s->regs[R_GQSPI_RX_THRESH] ? 347 IXR_RX_FIFO_NOT_EMPTY : 0) | 348 (fifo8_is_empty(&s->tx_fifo_g) ? IXR_TX_FIFO_EMPTY : 0) | 349 (fifo8_is_full(&s->tx_fifo_g) ? IXR_TX_FIFO_FULL : 0) | 350 (s->tx_fifo_g.num < s->regs[R_GQSPI_TX_THRESH] ? 351 IXR_TX_FIFO_NOT_FULL : 0); 352 353 /* GQSPI Interrupt Trigger Status */ 354 gqspi_int = (~s->regs[R_GQSPI_IMR]) & s->regs[R_GQSPI_ISR] & GQSPI_IXR_MASK; 355 new_irqline = !!(gqspi_int & IXR_ALL); 356 357 /* drive external interrupt pin */ 358 if (new_irqline != s->gqspi_irqline) { 359 s->gqspi_irqline = new_irqline; 360 qemu_set_irq(XILINX_SPIPS(s)->irq, s->gqspi_irqline); 361 } 362 } 363 364 static void xilinx_spips_reset(DeviceState *d) 365 { 366 XilinxSPIPS *s = XILINX_SPIPS(d); 367 368 memset(s->regs, 0, sizeof(s->regs)); 369 370 fifo8_reset(&s->rx_fifo); 371 fifo8_reset(&s->rx_fifo); 372 /* non zero resets */ 373 s->regs[R_CONFIG] |= MODEFAIL_GEN_EN; 374 s->regs[R_SLAVE_IDLE_COUNT] = 0xFF; 375 s->regs[R_TX_THRES] = 1; 376 s->regs[R_RX_THRES] = 1; 377 /* FIXME: move magic number definition somewhere sensible */ 378 s->regs[R_MOD_ID] = 0x01090106; 379 s->regs[R_LQSPI_CFG] = R_LQSPI_CFG_RESET; 380 s->link_state = 1; 381 s->link_state_next = 1; 382 s->link_state_next_when = 0; 383 s->snoop_state = SNOOP_CHECKING; 384 s->cmd_dummies = 0; 385 s->man_start_com = false; 386 xilinx_spips_update_ixr(s); 387 xilinx_spips_update_cs_lines(s); 388 } 389 390 static void xlnx_zynqmp_qspips_reset(DeviceState *d) 391 { 392 XlnxZynqMPQSPIPS *s = XLNX_ZYNQMP_QSPIPS(d); 393 394 xilinx_spips_reset(d); 395 396 memset(s->regs, 0, sizeof(s->regs)); 397 398 fifo8_reset(&s->rx_fifo_g); 399 fifo8_reset(&s->rx_fifo_g); 400 fifo32_reset(&s->fifo_g); 401 s->regs[R_INTR_STATUS] = R_INTR_STATUS_RESET; 402 s->regs[R_GPIO] = 1; 403 s->regs[R_LPBK_DLY_ADJ] = R_LPBK_DLY_ADJ_RESET; 404 s->regs[R_GQSPI_GFIFO_THRESH] = 0x10; 405 s->regs[R_MOD_ID] = 0x01090101; 406 s->regs[R_GQSPI_IMR] = R_GQSPI_IMR_RESET; 407 s->regs[R_GQSPI_TX_THRESH] = 1; 408 s->regs[R_GQSPI_RX_THRESH] = 1; 409 s->regs[R_GQSPI_GPIO] = 1; 410 s->regs[R_GQSPI_LPBK_DLY_ADJ] = R_GQSPI_LPBK_DLY_ADJ_RESET; 411 s->regs[R_GQSPI_MOD_ID] = R_GQSPI_MOD_ID_RESET; 412 s->regs[R_QSPIDMA_DST_CTRL] = R_QSPIDMA_DST_CTRL_RESET; 413 s->regs[R_QSPIDMA_DST_I_MASK] = R_QSPIDMA_DST_I_MASK_RESET; 414 s->regs[R_QSPIDMA_DST_CTRL2] = R_QSPIDMA_DST_CTRL2_RESET; 415 s->man_start_com_g = false; 416 s->gqspi_irqline = 0; 417 xlnx_zynqmp_qspips_update_ixr(s); 418 } 419 420 /* N way (num) in place bit striper. Lay out row wise bits (MSB to LSB) 421 * column wise (from element 0 to N-1). num is the length of x, and dir 422 * reverses the direction of the transform. Best illustrated by example: 423 * Each digit in the below array is a single bit (num == 3): 424 * 425 * {{ 76543210, } ----- stripe (dir == false) -----> {{ 741gdaFC, } 426 * { hgfedcba, } { 630fcHEB, } 427 * { HGFEDCBA, }} <---- upstripe (dir == true) ----- { 52hebGDA, }} 428 */ 429 430 static inline void stripe8(uint8_t *x, int num, bool dir) 431 { 432 uint8_t r[num]; 433 memset(r, 0, sizeof(uint8_t) * num); 434 int idx[2] = {0, 0}; 435 int bit[2] = {0, 7}; 436 int d = dir; 437 438 for (idx[0] = 0; idx[0] < num; ++idx[0]) { 439 for (bit[0] = 7; bit[0] >= 0; bit[0]--) { 440 r[idx[!d]] |= x[idx[d]] & 1 << bit[d] ? 1 << bit[!d] : 0; 441 idx[1] = (idx[1] + 1) % num; 442 if (!idx[1]) { 443 bit[1]--; 444 } 445 } 446 } 447 memcpy(x, r, sizeof(uint8_t) * num); 448 } 449 450 static void xlnx_zynqmp_qspips_flush_fifo_g(XlnxZynqMPQSPIPS *s) 451 { 452 while (s->regs[R_GQSPI_DATA_STS] || !fifo32_is_empty(&s->fifo_g)) { 453 uint8_t tx_rx[2] = { 0 }; 454 int num_stripes = 1; 455 uint8_t busses; 456 int i; 457 458 if (!s->regs[R_GQSPI_DATA_STS]) { 459 uint8_t imm; 460 461 s->regs[R_GQSPI_GF_SNAPSHOT] = fifo32_pop(&s->fifo_g); 462 DB_PRINT_L(0, "GQSPI command: %x\n", s->regs[R_GQSPI_GF_SNAPSHOT]); 463 if (!s->regs[R_GQSPI_GF_SNAPSHOT]) { 464 DB_PRINT_L(0, "Dummy GQSPI Delay Command Entry, Do nothing"); 465 continue; 466 } 467 xlnx_zynqmp_qspips_update_cs_lines(s); 468 469 imm = ARRAY_FIELD_EX32(s->regs, GQSPI_GF_SNAPSHOT, IMMEDIATE_DATA); 470 if (!ARRAY_FIELD_EX32(s->regs, GQSPI_GF_SNAPSHOT, DATA_XFER)) { 471 /* immedate transfer */ 472 if (ARRAY_FIELD_EX32(s->regs, GQSPI_GF_SNAPSHOT, TRANSMIT) || 473 ARRAY_FIELD_EX32(s->regs, GQSPI_GF_SNAPSHOT, RECIEVE)) { 474 s->regs[R_GQSPI_DATA_STS] = 1; 475 /* CS setup/hold - do nothing */ 476 } else { 477 s->regs[R_GQSPI_DATA_STS] = 0; 478 } 479 } else if (ARRAY_FIELD_EX32(s->regs, GQSPI_GF_SNAPSHOT, EXPONENT)) { 480 if (imm > 31) { 481 qemu_log_mask(LOG_UNIMP, "QSPI exponential transfer too" 482 " long - 2 ^ %" PRId8 " requested\n", imm); 483 } 484 s->regs[R_GQSPI_DATA_STS] = 1ul << imm; 485 } else { 486 s->regs[R_GQSPI_DATA_STS] = imm; 487 } 488 } 489 /* Zero length transfer check */ 490 if (!s->regs[R_GQSPI_DATA_STS]) { 491 continue; 492 } 493 if (ARRAY_FIELD_EX32(s->regs, GQSPI_GF_SNAPSHOT, RECIEVE) && 494 fifo8_is_full(&s->rx_fifo_g)) { 495 /* No space in RX fifo for transfer - try again later */ 496 return; 497 } 498 if (ARRAY_FIELD_EX32(s->regs, GQSPI_GF_SNAPSHOT, STRIPE) && 499 (ARRAY_FIELD_EX32(s->regs, GQSPI_GF_SNAPSHOT, TRANSMIT) || 500 ARRAY_FIELD_EX32(s->regs, GQSPI_GF_SNAPSHOT, RECIEVE))) { 501 num_stripes = 2; 502 } 503 if (!ARRAY_FIELD_EX32(s->regs, GQSPI_GF_SNAPSHOT, DATA_XFER)) { 504 tx_rx[0] = ARRAY_FIELD_EX32(s->regs, 505 GQSPI_GF_SNAPSHOT, IMMEDIATE_DATA); 506 } else if (ARRAY_FIELD_EX32(s->regs, GQSPI_GF_SNAPSHOT, TRANSMIT)) { 507 for (i = 0; i < num_stripes; ++i) { 508 if (!fifo8_is_empty(&s->tx_fifo_g)) { 509 tx_rx[i] = fifo8_pop(&s->tx_fifo_g); 510 s->tx_fifo_g_align++; 511 } else { 512 return; 513 } 514 } 515 } 516 if (num_stripes == 1) { 517 /* mirror */ 518 tx_rx[1] = tx_rx[0]; 519 } 520 busses = ARRAY_FIELD_EX32(s->regs, GQSPI_GF_SNAPSHOT, DATA_BUS_SELECT); 521 for (i = 0; i < 2; ++i) { 522 DB_PRINT_L(1, "bus %d tx = %02x\n", i, tx_rx[i]); 523 tx_rx[i] = ssi_transfer(XILINX_SPIPS(s)->spi[i], tx_rx[i]); 524 DB_PRINT_L(1, "bus %d rx = %02x\n", i, tx_rx[i]); 525 } 526 if (s->regs[R_GQSPI_DATA_STS] > 1 && 527 busses == 0x3 && num_stripes == 2) { 528 s->regs[R_GQSPI_DATA_STS] -= 2; 529 } else if (s->regs[R_GQSPI_DATA_STS] > 0) { 530 s->regs[R_GQSPI_DATA_STS]--; 531 } 532 if (ARRAY_FIELD_EX32(s->regs, GQSPI_GF_SNAPSHOT, RECIEVE)) { 533 for (i = 0; i < 2; ++i) { 534 if (busses & (1 << i)) { 535 DB_PRINT_L(1, "bus %d push_byte = %02x\n", i, tx_rx[i]); 536 fifo8_push(&s->rx_fifo_g, tx_rx[i]); 537 s->rx_fifo_g_align++; 538 } 539 } 540 } 541 if (!s->regs[R_GQSPI_DATA_STS]) { 542 for (; s->tx_fifo_g_align % 4; s->tx_fifo_g_align++) { 543 fifo8_pop(&s->tx_fifo_g); 544 } 545 for (; s->rx_fifo_g_align % 4; s->rx_fifo_g_align++) { 546 fifo8_push(&s->rx_fifo_g, 0); 547 } 548 } 549 } 550 } 551 552 static int xilinx_spips_num_dummies(XilinxQSPIPS *qs, uint8_t command) 553 { 554 if (!qs) { 555 /* The SPI device is not a QSPI device */ 556 return -1; 557 } 558 559 switch (command) { /* check for dummies */ 560 case READ: /* no dummy bytes/cycles */ 561 case PP: 562 case DPP: 563 case QPP: 564 case READ_4: 565 case PP_4: 566 case QPP_4: 567 return 0; 568 case FAST_READ: 569 case DOR: 570 case QOR: 571 case DOR_4: 572 case QOR_4: 573 return 1; 574 case DIOR: 575 case FAST_READ_4: 576 case DIOR_4: 577 return 2; 578 case QIOR: 579 case QIOR_4: 580 return 4; 581 default: 582 return -1; 583 } 584 } 585 586 static inline uint8_t get_addr_length(XilinxSPIPS *s, uint8_t cmd) 587 { 588 switch (cmd) { 589 case PP_4: 590 case QPP_4: 591 case READ_4: 592 case QIOR_4: 593 case FAST_READ_4: 594 case DOR_4: 595 case QOR_4: 596 case DIOR_4: 597 return 4; 598 default: 599 return (s->regs[R_CMND] & R_CMND_EXT_ADD) ? 4 : 3; 600 } 601 } 602 603 static void xilinx_spips_flush_txfifo(XilinxSPIPS *s) 604 { 605 int debug_level = 0; 606 XilinxQSPIPS *q = (XilinxQSPIPS *) object_dynamic_cast(OBJECT(s), 607 TYPE_XILINX_QSPIPS); 608 609 for (;;) { 610 int i; 611 uint8_t tx = 0; 612 uint8_t tx_rx[MAX_NUM_BUSSES] = { 0 }; 613 uint8_t dummy_cycles = 0; 614 uint8_t addr_length; 615 616 if (fifo8_is_empty(&s->tx_fifo)) { 617 xilinx_spips_update_ixr(s); 618 return; 619 } else if (s->snoop_state == SNOOP_STRIPING) { 620 for (i = 0; i < num_effective_busses(s); ++i) { 621 tx_rx[i] = fifo8_pop(&s->tx_fifo); 622 } 623 stripe8(tx_rx, num_effective_busses(s), false); 624 } else if (s->snoop_state >= SNOOP_ADDR) { 625 tx = fifo8_pop(&s->tx_fifo); 626 for (i = 0; i < num_effective_busses(s); ++i) { 627 tx_rx[i] = tx; 628 } 629 } else { 630 /* Extract a dummy byte and generate dummy cycles according to the 631 * link state */ 632 tx = fifo8_pop(&s->tx_fifo); 633 dummy_cycles = 8 / s->link_state; 634 } 635 636 for (i = 0; i < num_effective_busses(s); ++i) { 637 int bus = num_effective_busses(s) - 1 - i; 638 if (dummy_cycles) { 639 int d; 640 for (d = 0; d < dummy_cycles; ++d) { 641 tx_rx[0] = ssi_transfer(s->spi[bus], (uint32_t)tx_rx[0]); 642 } 643 } else { 644 DB_PRINT_L(debug_level, "tx = %02x\n", tx_rx[i]); 645 tx_rx[i] = ssi_transfer(s->spi[bus], (uint32_t)tx_rx[i]); 646 DB_PRINT_L(debug_level, "rx = %02x\n", tx_rx[i]); 647 } 648 } 649 650 if (s->regs[R_CMND] & R_CMND_RXFIFO_DRAIN) { 651 DB_PRINT_L(debug_level, "dircarding drained rx byte\n"); 652 /* Do nothing */ 653 } else if (s->rx_discard) { 654 DB_PRINT_L(debug_level, "dircarding discarded rx byte\n"); 655 s->rx_discard -= 8 / s->link_state; 656 } else if (fifo8_is_full(&s->rx_fifo)) { 657 s->regs[R_INTR_STATUS] |= IXR_RX_FIFO_OVERFLOW; 658 DB_PRINT_L(0, "rx FIFO overflow"); 659 } else if (s->snoop_state == SNOOP_STRIPING) { 660 stripe8(tx_rx, num_effective_busses(s), true); 661 for (i = 0; i < num_effective_busses(s); ++i) { 662 fifo8_push(&s->rx_fifo, (uint8_t)tx_rx[i]); 663 DB_PRINT_L(debug_level, "pushing striped rx byte\n"); 664 } 665 } else { 666 DB_PRINT_L(debug_level, "pushing unstriped rx byte\n"); 667 fifo8_push(&s->rx_fifo, (uint8_t)tx_rx[0]); 668 } 669 670 if (s->link_state_next_when) { 671 s->link_state_next_when--; 672 if (!s->link_state_next_when) { 673 s->link_state = s->link_state_next; 674 } 675 } 676 677 DB_PRINT_L(debug_level, "initial snoop state: %x\n", 678 (unsigned)s->snoop_state); 679 switch (s->snoop_state) { 680 case (SNOOP_CHECKING): 681 /* Store the count of dummy bytes in the txfifo */ 682 s->cmd_dummies = xilinx_spips_num_dummies(q, tx); 683 addr_length = get_addr_length(s, tx); 684 if (s->cmd_dummies < 0) { 685 s->snoop_state = SNOOP_NONE; 686 } else { 687 s->snoop_state = SNOOP_ADDR + addr_length - 1; 688 } 689 switch (tx) { 690 case DPP: 691 case DOR: 692 case DOR_4: 693 s->link_state_next = 2; 694 s->link_state_next_when = addr_length + s->cmd_dummies; 695 break; 696 case QPP: 697 case QPP_4: 698 case QOR: 699 case QOR_4: 700 s->link_state_next = 4; 701 s->link_state_next_when = addr_length + s->cmd_dummies; 702 break; 703 case DIOR: 704 case DIOR_4: 705 s->link_state = 2; 706 break; 707 case QIOR: 708 case QIOR_4: 709 s->link_state = 4; 710 break; 711 } 712 break; 713 case (SNOOP_ADDR): 714 /* Address has been transmitted, transmit dummy cycles now if 715 * needed */ 716 if (s->cmd_dummies < 0) { 717 s->snoop_state = SNOOP_NONE; 718 } else { 719 s->snoop_state = s->cmd_dummies; 720 } 721 break; 722 case (SNOOP_STRIPING): 723 case (SNOOP_NONE): 724 /* Once we hit the boring stuff - squelch debug noise */ 725 if (!debug_level) { 726 DB_PRINT_L(0, "squelching debug info ....\n"); 727 debug_level = 1; 728 } 729 break; 730 default: 731 s->snoop_state--; 732 } 733 DB_PRINT_L(debug_level, "final snoop state: %x\n", 734 (unsigned)s->snoop_state); 735 } 736 } 737 738 static inline void tx_data_bytes(Fifo8 *fifo, uint32_t value, int num, bool be) 739 { 740 int i; 741 for (i = 0; i < num && !fifo8_is_full(fifo); ++i) { 742 if (be) { 743 fifo8_push(fifo, (uint8_t)(value >> 24)); 744 value <<= 8; 745 } else { 746 fifo8_push(fifo, (uint8_t)value); 747 value >>= 8; 748 } 749 } 750 } 751 752 static void xilinx_spips_check_zero_pump(XilinxSPIPS *s) 753 { 754 if (!s->regs[R_TRANSFER_SIZE]) { 755 return; 756 } 757 if (!fifo8_is_empty(&s->tx_fifo) && s->regs[R_CMND] & R_CMND_PUSH_WAIT) { 758 return; 759 } 760 /* 761 * The zero pump must never fill tx fifo such that rx overflow is 762 * possible 763 */ 764 while (s->regs[R_TRANSFER_SIZE] && 765 s->rx_fifo.num + s->tx_fifo.num < RXFF_A_Q - 3) { 766 /* endianess just doesn't matter when zero pumping */ 767 tx_data_bytes(&s->tx_fifo, 0, 4, false); 768 s->regs[R_TRANSFER_SIZE] &= ~0x03ull; 769 s->regs[R_TRANSFER_SIZE] -= 4; 770 } 771 } 772 773 static void xilinx_spips_check_flush(XilinxSPIPS *s) 774 { 775 if (s->man_start_com || 776 (!fifo8_is_empty(&s->tx_fifo) && 777 !(s->regs[R_CONFIG] & MAN_START_EN))) { 778 xilinx_spips_check_zero_pump(s); 779 xilinx_spips_flush_txfifo(s); 780 } 781 if (fifo8_is_empty(&s->tx_fifo) && !s->regs[R_TRANSFER_SIZE]) { 782 s->man_start_com = false; 783 } 784 xilinx_spips_update_ixr(s); 785 } 786 787 static void xlnx_zynqmp_qspips_check_flush(XlnxZynqMPQSPIPS *s) 788 { 789 bool gqspi_has_work = s->regs[R_GQSPI_DATA_STS] || 790 !fifo32_is_empty(&s->fifo_g); 791 792 if (ARRAY_FIELD_EX32(s->regs, GQSPI_SELECT, GENERIC_QSPI_EN)) { 793 if (s->man_start_com_g || (gqspi_has_work && 794 !ARRAY_FIELD_EX32(s->regs, GQSPI_CNFG, GEN_FIFO_START_MODE))) { 795 xlnx_zynqmp_qspips_flush_fifo_g(s); 796 } 797 } else { 798 xilinx_spips_check_flush(XILINX_SPIPS(s)); 799 } 800 if (!gqspi_has_work) { 801 s->man_start_com_g = false; 802 } 803 xlnx_zynqmp_qspips_update_ixr(s); 804 } 805 806 static inline int rx_data_bytes(Fifo8 *fifo, uint8_t *value, int max) 807 { 808 int i; 809 810 for (i = 0; i < max && !fifo8_is_empty(fifo); ++i) { 811 value[i] = fifo8_pop(fifo); 812 } 813 return max - i; 814 } 815 816 static const void *pop_buf(Fifo8 *fifo, uint32_t max, uint32_t *num) 817 { 818 void *ret; 819 820 if (max == 0 || max > fifo->num) { 821 abort(); 822 } 823 *num = MIN(fifo->capacity - fifo->head, max); 824 ret = &fifo->data[fifo->head]; 825 fifo->head += *num; 826 fifo->head %= fifo->capacity; 827 fifo->num -= *num; 828 return ret; 829 } 830 831 static void xlnx_zynqmp_qspips_notify(void *opaque) 832 { 833 XlnxZynqMPQSPIPS *rq = XLNX_ZYNQMP_QSPIPS(opaque); 834 XilinxSPIPS *s = XILINX_SPIPS(rq); 835 Fifo8 *recv_fifo; 836 837 if (ARRAY_FIELD_EX32(rq->regs, GQSPI_SELECT, GENERIC_QSPI_EN)) { 838 if (!(ARRAY_FIELD_EX32(rq->regs, GQSPI_CNFG, MODE_EN) == 2)) { 839 return; 840 } 841 recv_fifo = &rq->rx_fifo_g; 842 } else { 843 if (!(s->regs[R_CMND] & R_CMND_DMA_EN)) { 844 return; 845 } 846 recv_fifo = &s->rx_fifo; 847 } 848 while (recv_fifo->num >= 4 849 && stream_can_push(rq->dma, xlnx_zynqmp_qspips_notify, rq)) 850 { 851 size_t ret; 852 uint32_t num; 853 const void *rxd = pop_buf(recv_fifo, 4, &num); 854 855 memcpy(rq->dma_buf, rxd, num); 856 857 ret = stream_push(rq->dma, rq->dma_buf, 4); 858 assert(ret == 4); 859 xlnx_zynqmp_qspips_check_flush(rq); 860 } 861 } 862 863 static uint64_t xilinx_spips_read(void *opaque, hwaddr addr, 864 unsigned size) 865 { 866 XilinxSPIPS *s = opaque; 867 uint32_t mask = ~0; 868 uint32_t ret; 869 uint8_t rx_buf[4]; 870 int shortfall; 871 872 addr >>= 2; 873 switch (addr) { 874 case R_CONFIG: 875 mask = ~(R_CONFIG_RSVD | MAN_START_COM); 876 break; 877 case R_INTR_STATUS: 878 ret = s->regs[addr] & IXR_ALL; 879 s->regs[addr] = 0; 880 DB_PRINT_L(0, "addr=" TARGET_FMT_plx " = %x\n", addr * 4, ret); 881 xilinx_spips_update_ixr(s); 882 return ret; 883 case R_INTR_MASK: 884 mask = IXR_ALL; 885 break; 886 case R_EN: 887 mask = 0x1; 888 break; 889 case R_SLAVE_IDLE_COUNT: 890 mask = 0xFF; 891 break; 892 case R_MOD_ID: 893 mask = 0x01FFFFFF; 894 break; 895 case R_INTR_EN: 896 case R_INTR_DIS: 897 case R_TX_DATA: 898 mask = 0; 899 break; 900 case R_RX_DATA: 901 memset(rx_buf, 0, sizeof(rx_buf)); 902 shortfall = rx_data_bytes(&s->rx_fifo, rx_buf, s->num_txrx_bytes); 903 ret = s->regs[R_CONFIG] & R_CONFIG_ENDIAN ? 904 cpu_to_be32(*(uint32_t *)rx_buf) : 905 cpu_to_le32(*(uint32_t *)rx_buf); 906 if (!(s->regs[R_CONFIG] & R_CONFIG_ENDIAN)) { 907 ret <<= 8 * shortfall; 908 } 909 DB_PRINT_L(0, "addr=" TARGET_FMT_plx " = %x\n", addr * 4, ret); 910 xilinx_spips_check_flush(s); 911 xilinx_spips_update_ixr(s); 912 return ret; 913 } 914 DB_PRINT_L(0, "addr=" TARGET_FMT_plx " = %x\n", addr * 4, 915 s->regs[addr] & mask); 916 return s->regs[addr] & mask; 917 918 } 919 920 static uint64_t xlnx_zynqmp_qspips_read(void *opaque, 921 hwaddr addr, unsigned size) 922 { 923 XlnxZynqMPQSPIPS *s = XLNX_ZYNQMP_QSPIPS(opaque); 924 uint32_t reg = addr / 4; 925 uint32_t ret; 926 uint8_t rx_buf[4]; 927 int shortfall; 928 929 if (reg <= R_MOD_ID) { 930 return xilinx_spips_read(opaque, addr, size); 931 } else { 932 switch (reg) { 933 case R_GQSPI_RXD: 934 if (fifo8_is_empty(&s->rx_fifo_g)) { 935 qemu_log_mask(LOG_GUEST_ERROR, 936 "Read from empty GQSPI RX FIFO\n"); 937 return 0; 938 } 939 memset(rx_buf, 0, sizeof(rx_buf)); 940 shortfall = rx_data_bytes(&s->rx_fifo_g, rx_buf, 941 XILINX_SPIPS(s)->num_txrx_bytes); 942 ret = ARRAY_FIELD_EX32(s->regs, GQSPI_CNFG, ENDIAN) ? 943 cpu_to_be32(*(uint32_t *)rx_buf) : 944 cpu_to_le32(*(uint32_t *)rx_buf); 945 if (!ARRAY_FIELD_EX32(s->regs, GQSPI_CNFG, ENDIAN)) { 946 ret <<= 8 * shortfall; 947 } 948 xlnx_zynqmp_qspips_check_flush(s); 949 xlnx_zynqmp_qspips_update_ixr(s); 950 return ret; 951 default: 952 return s->regs[reg]; 953 } 954 } 955 } 956 957 static void xilinx_spips_write(void *opaque, hwaddr addr, 958 uint64_t value, unsigned size) 959 { 960 int mask = ~0; 961 XilinxSPIPS *s = opaque; 962 963 DB_PRINT_L(0, "addr=" TARGET_FMT_plx " = %x\n", addr, (unsigned)value); 964 addr >>= 2; 965 switch (addr) { 966 case R_CONFIG: 967 mask = ~(R_CONFIG_RSVD | MAN_START_COM); 968 if ((value & MAN_START_COM) && (s->regs[R_CONFIG] & MAN_START_EN)) { 969 s->man_start_com = true; 970 } 971 break; 972 case R_INTR_STATUS: 973 mask = IXR_ALL; 974 s->regs[R_INTR_STATUS] &= ~(mask & value); 975 goto no_reg_update; 976 case R_INTR_DIS: 977 mask = IXR_ALL; 978 s->regs[R_INTR_MASK] &= ~(mask & value); 979 goto no_reg_update; 980 case R_INTR_EN: 981 mask = IXR_ALL; 982 s->regs[R_INTR_MASK] |= mask & value; 983 goto no_reg_update; 984 case R_EN: 985 mask = 0x1; 986 break; 987 case R_SLAVE_IDLE_COUNT: 988 mask = 0xFF; 989 break; 990 case R_RX_DATA: 991 case R_INTR_MASK: 992 case R_MOD_ID: 993 mask = 0; 994 break; 995 case R_TX_DATA: 996 tx_data_bytes(&s->tx_fifo, (uint32_t)value, s->num_txrx_bytes, 997 s->regs[R_CONFIG] & R_CONFIG_ENDIAN); 998 goto no_reg_update; 999 case R_TXD1: 1000 tx_data_bytes(&s->tx_fifo, (uint32_t)value, 1, 1001 s->regs[R_CONFIG] & R_CONFIG_ENDIAN); 1002 goto no_reg_update; 1003 case R_TXD2: 1004 tx_data_bytes(&s->tx_fifo, (uint32_t)value, 2, 1005 s->regs[R_CONFIG] & R_CONFIG_ENDIAN); 1006 goto no_reg_update; 1007 case R_TXD3: 1008 tx_data_bytes(&s->tx_fifo, (uint32_t)value, 3, 1009 s->regs[R_CONFIG] & R_CONFIG_ENDIAN); 1010 goto no_reg_update; 1011 } 1012 s->regs[addr] = (s->regs[addr] & ~mask) | (value & mask); 1013 no_reg_update: 1014 xilinx_spips_update_cs_lines(s); 1015 xilinx_spips_check_flush(s); 1016 xilinx_spips_update_cs_lines(s); 1017 xilinx_spips_update_ixr(s); 1018 } 1019 1020 static const MemoryRegionOps spips_ops = { 1021 .read = xilinx_spips_read, 1022 .write = xilinx_spips_write, 1023 .endianness = DEVICE_LITTLE_ENDIAN, 1024 }; 1025 1026 static void xilinx_qspips_invalidate_mmio_ptr(XilinxQSPIPS *q) 1027 { 1028 XilinxSPIPS *s = &q->parent_obj; 1029 1030 if ((q->mmio_execution_enabled) && (q->lqspi_cached_addr != ~0ULL)) { 1031 /* Invalidate the current mapped mmio */ 1032 memory_region_invalidate_mmio_ptr(&s->mmlqspi, q->lqspi_cached_addr, 1033 LQSPI_CACHE_SIZE); 1034 } 1035 1036 q->lqspi_cached_addr = ~0ULL; 1037 } 1038 1039 static void xilinx_qspips_write(void *opaque, hwaddr addr, 1040 uint64_t value, unsigned size) 1041 { 1042 XilinxQSPIPS *q = XILINX_QSPIPS(opaque); 1043 XilinxSPIPS *s = XILINX_SPIPS(opaque); 1044 1045 xilinx_spips_write(opaque, addr, value, size); 1046 addr >>= 2; 1047 1048 if (addr == R_LQSPI_CFG) { 1049 xilinx_qspips_invalidate_mmio_ptr(q); 1050 } 1051 if (s->regs[R_CMND] & R_CMND_RXFIFO_DRAIN) { 1052 fifo8_reset(&s->rx_fifo); 1053 } 1054 } 1055 1056 static void xlnx_zynqmp_qspips_write(void *opaque, hwaddr addr, 1057 uint64_t value, unsigned size) 1058 { 1059 XlnxZynqMPQSPIPS *s = XLNX_ZYNQMP_QSPIPS(opaque); 1060 uint32_t reg = addr / 4; 1061 1062 if (reg <= R_MOD_ID) { 1063 xilinx_qspips_write(opaque, addr, value, size); 1064 } else { 1065 switch (reg) { 1066 case R_GQSPI_CNFG: 1067 if (FIELD_EX32(value, GQSPI_CNFG, GEN_FIFO_START) && 1068 ARRAY_FIELD_EX32(s->regs, GQSPI_CNFG, GEN_FIFO_START_MODE)) { 1069 s->man_start_com_g = true; 1070 } 1071 s->regs[reg] = value & ~(R_GQSPI_CNFG_GEN_FIFO_START_MASK); 1072 break; 1073 case R_GQSPI_GEN_FIFO: 1074 if (!fifo32_is_full(&s->fifo_g)) { 1075 fifo32_push(&s->fifo_g, value); 1076 } 1077 break; 1078 case R_GQSPI_TXD: 1079 tx_data_bytes(&s->tx_fifo_g, (uint32_t)value, 4, 1080 ARRAY_FIELD_EX32(s->regs, GQSPI_CNFG, ENDIAN)); 1081 break; 1082 case R_GQSPI_FIFO_CTRL: 1083 if (FIELD_EX32(value, GQSPI_FIFO_CTRL, GENERIC_FIFO_RESET)) { 1084 fifo32_reset(&s->fifo_g); 1085 } 1086 if (FIELD_EX32(value, GQSPI_FIFO_CTRL, TX_FIFO_RESET)) { 1087 fifo8_reset(&s->tx_fifo_g); 1088 } 1089 if (FIELD_EX32(value, GQSPI_FIFO_CTRL, RX_FIFO_RESET)) { 1090 fifo8_reset(&s->rx_fifo_g); 1091 } 1092 break; 1093 case R_GQSPI_IDR: 1094 s->regs[R_GQSPI_IMR] |= value; 1095 break; 1096 case R_GQSPI_IER: 1097 s->regs[R_GQSPI_IMR] &= ~value; 1098 break; 1099 case R_GQSPI_ISR: 1100 s->regs[R_GQSPI_ISR] &= ~value; 1101 break; 1102 case R_GQSPI_IMR: 1103 case R_GQSPI_RXD: 1104 case R_GQSPI_GF_SNAPSHOT: 1105 case R_GQSPI_MOD_ID: 1106 break; 1107 default: 1108 s->regs[reg] = value; 1109 break; 1110 } 1111 xlnx_zynqmp_qspips_update_cs_lines(s); 1112 xlnx_zynqmp_qspips_check_flush(s); 1113 xlnx_zynqmp_qspips_update_cs_lines(s); 1114 xlnx_zynqmp_qspips_update_ixr(s); 1115 } 1116 xlnx_zynqmp_qspips_notify(s); 1117 } 1118 1119 static const MemoryRegionOps qspips_ops = { 1120 .read = xilinx_spips_read, 1121 .write = xilinx_qspips_write, 1122 .endianness = DEVICE_LITTLE_ENDIAN, 1123 }; 1124 1125 static const MemoryRegionOps xlnx_zynqmp_qspips_ops = { 1126 .read = xlnx_zynqmp_qspips_read, 1127 .write = xlnx_zynqmp_qspips_write, 1128 .endianness = DEVICE_LITTLE_ENDIAN, 1129 }; 1130 1131 #define LQSPI_CACHE_SIZE 1024 1132 1133 static void lqspi_load_cache(void *opaque, hwaddr addr) 1134 { 1135 XilinxQSPIPS *q = opaque; 1136 XilinxSPIPS *s = opaque; 1137 int i; 1138 int flash_addr = ((addr & ~(LQSPI_CACHE_SIZE - 1)) 1139 / num_effective_busses(s)); 1140 int slave = flash_addr >> LQSPI_ADDRESS_BITS; 1141 int cache_entry = 0; 1142 uint32_t u_page_save = s->regs[R_LQSPI_STS] & ~LQSPI_CFG_U_PAGE; 1143 1144 if (addr < q->lqspi_cached_addr || 1145 addr > q->lqspi_cached_addr + LQSPI_CACHE_SIZE - 4) { 1146 xilinx_qspips_invalidate_mmio_ptr(q); 1147 s->regs[R_LQSPI_STS] &= ~LQSPI_CFG_U_PAGE; 1148 s->regs[R_LQSPI_STS] |= slave ? LQSPI_CFG_U_PAGE : 0; 1149 1150 DB_PRINT_L(0, "config reg status: %08x\n", s->regs[R_LQSPI_CFG]); 1151 1152 fifo8_reset(&s->tx_fifo); 1153 fifo8_reset(&s->rx_fifo); 1154 1155 /* instruction */ 1156 DB_PRINT_L(0, "pushing read instruction: %02x\n", 1157 (unsigned)(uint8_t)(s->regs[R_LQSPI_CFG] & 1158 LQSPI_CFG_INST_CODE)); 1159 fifo8_push(&s->tx_fifo, s->regs[R_LQSPI_CFG] & LQSPI_CFG_INST_CODE); 1160 /* read address */ 1161 DB_PRINT_L(0, "pushing read address %06x\n", flash_addr); 1162 if (s->regs[R_LQSPI_CFG] & LQSPI_CFG_ADDR4) { 1163 fifo8_push(&s->tx_fifo, (uint8_t)(flash_addr >> 24)); 1164 } 1165 fifo8_push(&s->tx_fifo, (uint8_t)(flash_addr >> 16)); 1166 fifo8_push(&s->tx_fifo, (uint8_t)(flash_addr >> 8)); 1167 fifo8_push(&s->tx_fifo, (uint8_t)flash_addr); 1168 /* mode bits */ 1169 if (s->regs[R_LQSPI_CFG] & LQSPI_CFG_MODE_EN) { 1170 fifo8_push(&s->tx_fifo, extract32(s->regs[R_LQSPI_CFG], 1171 LQSPI_CFG_MODE_SHIFT, 1172 LQSPI_CFG_MODE_WIDTH)); 1173 } 1174 /* dummy bytes */ 1175 for (i = 0; i < (extract32(s->regs[R_LQSPI_CFG], LQSPI_CFG_DUMMY_SHIFT, 1176 LQSPI_CFG_DUMMY_WIDTH)); ++i) { 1177 DB_PRINT_L(0, "pushing dummy byte\n"); 1178 fifo8_push(&s->tx_fifo, 0); 1179 } 1180 xilinx_spips_update_cs_lines(s); 1181 xilinx_spips_flush_txfifo(s); 1182 fifo8_reset(&s->rx_fifo); 1183 1184 DB_PRINT_L(0, "starting QSPI data read\n"); 1185 1186 while (cache_entry < LQSPI_CACHE_SIZE) { 1187 for (i = 0; i < 64; ++i) { 1188 tx_data_bytes(&s->tx_fifo, 0, 1, false); 1189 } 1190 xilinx_spips_flush_txfifo(s); 1191 for (i = 0; i < 64; ++i) { 1192 rx_data_bytes(&s->rx_fifo, &q->lqspi_buf[cache_entry++], 1); 1193 } 1194 } 1195 1196 s->regs[R_LQSPI_STS] &= ~LQSPI_CFG_U_PAGE; 1197 s->regs[R_LQSPI_STS] |= u_page_save; 1198 xilinx_spips_update_cs_lines(s); 1199 1200 q->lqspi_cached_addr = flash_addr * num_effective_busses(s); 1201 } 1202 } 1203 1204 static void *lqspi_request_mmio_ptr(void *opaque, hwaddr addr, unsigned *size, 1205 unsigned *offset) 1206 { 1207 XilinxQSPIPS *q = opaque; 1208 hwaddr offset_within_the_region; 1209 1210 if (!q->mmio_execution_enabled) { 1211 return NULL; 1212 } 1213 1214 offset_within_the_region = addr & ~(LQSPI_CACHE_SIZE - 1); 1215 lqspi_load_cache(opaque, offset_within_the_region); 1216 *size = LQSPI_CACHE_SIZE; 1217 *offset = offset_within_the_region; 1218 return q->lqspi_buf; 1219 } 1220 1221 static uint64_t 1222 lqspi_read(void *opaque, hwaddr addr, unsigned int size) 1223 { 1224 XilinxQSPIPS *q = opaque; 1225 uint32_t ret; 1226 1227 if (addr >= q->lqspi_cached_addr && 1228 addr <= q->lqspi_cached_addr + LQSPI_CACHE_SIZE - 4) { 1229 uint8_t *retp = &q->lqspi_buf[addr - q->lqspi_cached_addr]; 1230 ret = cpu_to_le32(*(uint32_t *)retp); 1231 DB_PRINT_L(1, "addr: %08x, data: %08x\n", (unsigned)addr, 1232 (unsigned)ret); 1233 return ret; 1234 } else { 1235 lqspi_load_cache(opaque, addr); 1236 return lqspi_read(opaque, addr, size); 1237 } 1238 } 1239 1240 static const MemoryRegionOps lqspi_ops = { 1241 .read = lqspi_read, 1242 .request_ptr = lqspi_request_mmio_ptr, 1243 .endianness = DEVICE_NATIVE_ENDIAN, 1244 .valid = { 1245 .min_access_size = 1, 1246 .max_access_size = 4 1247 } 1248 }; 1249 1250 static void xilinx_spips_realize(DeviceState *dev, Error **errp) 1251 { 1252 XilinxSPIPS *s = XILINX_SPIPS(dev); 1253 SysBusDevice *sbd = SYS_BUS_DEVICE(dev); 1254 XilinxSPIPSClass *xsc = XILINX_SPIPS_GET_CLASS(s); 1255 qemu_irq *cs; 1256 int i; 1257 1258 DB_PRINT_L(0, "realized spips\n"); 1259 1260 if (s->num_busses > MAX_NUM_BUSSES) { 1261 error_setg(errp, 1262 "requested number of SPI busses %u exceeds maximum %d", 1263 s->num_busses, MAX_NUM_BUSSES); 1264 return; 1265 } 1266 if (s->num_busses < MIN_NUM_BUSSES) { 1267 error_setg(errp, 1268 "requested number of SPI busses %u is below minimum %d", 1269 s->num_busses, MIN_NUM_BUSSES); 1270 return; 1271 } 1272 1273 s->spi = g_new(SSIBus *, s->num_busses); 1274 for (i = 0; i < s->num_busses; ++i) { 1275 char bus_name[16]; 1276 snprintf(bus_name, 16, "spi%d", i); 1277 s->spi[i] = ssi_create_bus(dev, bus_name); 1278 } 1279 1280 s->cs_lines = g_new0(qemu_irq, s->num_cs * s->num_busses); 1281 s->cs_lines_state = g_new0(bool, s->num_cs * s->num_busses); 1282 for (i = 0, cs = s->cs_lines; i < s->num_busses; ++i, cs += s->num_cs) { 1283 ssi_auto_connect_slaves(DEVICE(s), cs, s->spi[i]); 1284 } 1285 1286 sysbus_init_irq(sbd, &s->irq); 1287 for (i = 0; i < s->num_cs * s->num_busses; ++i) { 1288 sysbus_init_irq(sbd, &s->cs_lines[i]); 1289 } 1290 1291 memory_region_init_io(&s->iomem, OBJECT(s), xsc->reg_ops, s, 1292 "spi", XLNX_ZYNQMP_SPIPS_R_MAX * 4); 1293 sysbus_init_mmio(sbd, &s->iomem); 1294 1295 s->irqline = -1; 1296 1297 fifo8_create(&s->rx_fifo, xsc->rx_fifo_size); 1298 fifo8_create(&s->tx_fifo, xsc->tx_fifo_size); 1299 } 1300 1301 static void xilinx_qspips_realize(DeviceState *dev, Error **errp) 1302 { 1303 XilinxSPIPS *s = XILINX_SPIPS(dev); 1304 XilinxQSPIPS *q = XILINX_QSPIPS(dev); 1305 SysBusDevice *sbd = SYS_BUS_DEVICE(dev); 1306 1307 DB_PRINT_L(0, "realized qspips\n"); 1308 1309 s->num_busses = 2; 1310 s->num_cs = 2; 1311 s->num_txrx_bytes = 4; 1312 1313 xilinx_spips_realize(dev, errp); 1314 memory_region_init_io(&s->mmlqspi, OBJECT(s), &lqspi_ops, s, "lqspi", 1315 (1 << LQSPI_ADDRESS_BITS) * 2); 1316 sysbus_init_mmio(sbd, &s->mmlqspi); 1317 1318 q->lqspi_cached_addr = ~0ULL; 1319 1320 /* mmio_execution breaks migration better aborting than having strange 1321 * bugs. 1322 */ 1323 if (q->mmio_execution_enabled) { 1324 error_setg(&q->migration_blocker, 1325 "enabling mmio_execution breaks migration"); 1326 migrate_add_blocker(q->migration_blocker, &error_fatal); 1327 } 1328 } 1329 1330 static void xlnx_zynqmp_qspips_realize(DeviceState *dev, Error **errp) 1331 { 1332 XlnxZynqMPQSPIPS *s = XLNX_ZYNQMP_QSPIPS(dev); 1333 XilinxSPIPSClass *xsc = XILINX_SPIPS_GET_CLASS(s); 1334 1335 xilinx_qspips_realize(dev, errp); 1336 fifo8_create(&s->rx_fifo_g, xsc->rx_fifo_size); 1337 fifo8_create(&s->tx_fifo_g, xsc->tx_fifo_size); 1338 fifo32_create(&s->fifo_g, 32); 1339 } 1340 1341 static void xlnx_zynqmp_qspips_init(Object *obj) 1342 { 1343 XlnxZynqMPQSPIPS *rq = XLNX_ZYNQMP_QSPIPS(obj); 1344 1345 object_property_add_link(obj, "stream-connected-dma", TYPE_STREAM_SLAVE, 1346 (Object **)&rq->dma, 1347 object_property_allow_set_link, 1348 OBJ_PROP_LINK_UNREF_ON_RELEASE, 1349 NULL); 1350 } 1351 1352 static int xilinx_spips_post_load(void *opaque, int version_id) 1353 { 1354 xilinx_spips_update_ixr((XilinxSPIPS *)opaque); 1355 xilinx_spips_update_cs_lines((XilinxSPIPS *)opaque); 1356 return 0; 1357 } 1358 1359 static const VMStateDescription vmstate_xilinx_spips = { 1360 .name = "xilinx_spips", 1361 .version_id = 2, 1362 .minimum_version_id = 2, 1363 .post_load = xilinx_spips_post_load, 1364 .fields = (VMStateField[]) { 1365 VMSTATE_FIFO8(tx_fifo, XilinxSPIPS), 1366 VMSTATE_FIFO8(rx_fifo, XilinxSPIPS), 1367 VMSTATE_UINT32_ARRAY(regs, XilinxSPIPS, XLNX_SPIPS_R_MAX), 1368 VMSTATE_UINT8(snoop_state, XilinxSPIPS), 1369 VMSTATE_END_OF_LIST() 1370 } 1371 }; 1372 1373 static int xlnx_zynqmp_qspips_post_load(void *opaque, int version_id) 1374 { 1375 XlnxZynqMPQSPIPS *s = (XlnxZynqMPQSPIPS *)opaque; 1376 XilinxSPIPS *qs = XILINX_SPIPS(s); 1377 1378 if (ARRAY_FIELD_EX32(s->regs, GQSPI_SELECT, GENERIC_QSPI_EN) && 1379 fifo8_is_empty(&qs->rx_fifo) && fifo8_is_empty(&qs->tx_fifo)) { 1380 xlnx_zynqmp_qspips_update_ixr(s); 1381 xlnx_zynqmp_qspips_update_cs_lines(s); 1382 } 1383 return 0; 1384 } 1385 1386 static const VMStateDescription vmstate_xilinx_qspips = { 1387 .name = "xilinx_qspips", 1388 .version_id = 1, 1389 .minimum_version_id = 1, 1390 .fields = (VMStateField[]) { 1391 VMSTATE_STRUCT(parent_obj, XilinxQSPIPS, 0, 1392 vmstate_xilinx_spips, XilinxSPIPS), 1393 VMSTATE_END_OF_LIST() 1394 } 1395 }; 1396 1397 static const VMStateDescription vmstate_xlnx_zynqmp_qspips = { 1398 .name = "xlnx_zynqmp_qspips", 1399 .version_id = 1, 1400 .minimum_version_id = 1, 1401 .post_load = xlnx_zynqmp_qspips_post_load, 1402 .fields = (VMStateField[]) { 1403 VMSTATE_STRUCT(parent_obj, XlnxZynqMPQSPIPS, 0, 1404 vmstate_xilinx_qspips, XilinxQSPIPS), 1405 VMSTATE_FIFO8(tx_fifo_g, XlnxZynqMPQSPIPS), 1406 VMSTATE_FIFO8(rx_fifo_g, XlnxZynqMPQSPIPS), 1407 VMSTATE_FIFO32(fifo_g, XlnxZynqMPQSPIPS), 1408 VMSTATE_UINT32_ARRAY(regs, XlnxZynqMPQSPIPS, XLNX_ZYNQMP_SPIPS_R_MAX), 1409 VMSTATE_END_OF_LIST() 1410 } 1411 }; 1412 1413 static Property xilinx_qspips_properties[] = { 1414 /* We had to turn this off for 2.10 as it is not compatible with migration. 1415 * It can be enabled but will prevent the device to be migrated. 1416 * This will go aways when a fix will be released. 1417 */ 1418 DEFINE_PROP_BOOL("x-mmio-exec", XilinxQSPIPS, mmio_execution_enabled, 1419 false), 1420 DEFINE_PROP_END_OF_LIST(), 1421 }; 1422 1423 static Property xilinx_spips_properties[] = { 1424 DEFINE_PROP_UINT8("num-busses", XilinxSPIPS, num_busses, 1), 1425 DEFINE_PROP_UINT8("num-ss-bits", XilinxSPIPS, num_cs, 4), 1426 DEFINE_PROP_UINT8("num-txrx-bytes", XilinxSPIPS, num_txrx_bytes, 1), 1427 DEFINE_PROP_END_OF_LIST(), 1428 }; 1429 1430 static void xilinx_qspips_class_init(ObjectClass *klass, void * data) 1431 { 1432 DeviceClass *dc = DEVICE_CLASS(klass); 1433 XilinxSPIPSClass *xsc = XILINX_SPIPS_CLASS(klass); 1434 1435 dc->realize = xilinx_qspips_realize; 1436 dc->props = xilinx_qspips_properties; 1437 xsc->reg_ops = &qspips_ops; 1438 xsc->rx_fifo_size = RXFF_A_Q; 1439 xsc->tx_fifo_size = TXFF_A_Q; 1440 } 1441 1442 static void xilinx_spips_class_init(ObjectClass *klass, void *data) 1443 { 1444 DeviceClass *dc = DEVICE_CLASS(klass); 1445 XilinxSPIPSClass *xsc = XILINX_SPIPS_CLASS(klass); 1446 1447 dc->realize = xilinx_spips_realize; 1448 dc->reset = xilinx_spips_reset; 1449 dc->props = xilinx_spips_properties; 1450 dc->vmsd = &vmstate_xilinx_spips; 1451 1452 xsc->reg_ops = &spips_ops; 1453 xsc->rx_fifo_size = RXFF_A; 1454 xsc->tx_fifo_size = TXFF_A; 1455 } 1456 1457 static void xlnx_zynqmp_qspips_class_init(ObjectClass *klass, void * data) 1458 { 1459 DeviceClass *dc = DEVICE_CLASS(klass); 1460 XilinxSPIPSClass *xsc = XILINX_SPIPS_CLASS(klass); 1461 1462 dc->realize = xlnx_zynqmp_qspips_realize; 1463 dc->reset = xlnx_zynqmp_qspips_reset; 1464 dc->vmsd = &vmstate_xlnx_zynqmp_qspips; 1465 xsc->reg_ops = &xlnx_zynqmp_qspips_ops; 1466 xsc->rx_fifo_size = RXFF_A_Q; 1467 xsc->tx_fifo_size = TXFF_A_Q; 1468 } 1469 1470 static const TypeInfo xilinx_spips_info = { 1471 .name = TYPE_XILINX_SPIPS, 1472 .parent = TYPE_SYS_BUS_DEVICE, 1473 .instance_size = sizeof(XilinxSPIPS), 1474 .class_init = xilinx_spips_class_init, 1475 .class_size = sizeof(XilinxSPIPSClass), 1476 }; 1477 1478 static const TypeInfo xilinx_qspips_info = { 1479 .name = TYPE_XILINX_QSPIPS, 1480 .parent = TYPE_XILINX_SPIPS, 1481 .instance_size = sizeof(XilinxQSPIPS), 1482 .class_init = xilinx_qspips_class_init, 1483 }; 1484 1485 static const TypeInfo xlnx_zynqmp_qspips_info = { 1486 .name = TYPE_XLNX_ZYNQMP_QSPIPS, 1487 .parent = TYPE_XILINX_QSPIPS, 1488 .instance_size = sizeof(XlnxZynqMPQSPIPS), 1489 .instance_init = xlnx_zynqmp_qspips_init, 1490 .class_init = xlnx_zynqmp_qspips_class_init, 1491 }; 1492 1493 static void xilinx_spips_register_types(void) 1494 { 1495 type_register_static(&xilinx_spips_info); 1496 type_register_static(&xilinx_qspips_info); 1497 type_register_static(&xlnx_zynqmp_qspips_info); 1498 } 1499 1500 type_init(xilinx_spips_register_types) 1501