1 // SPDX-License-Identifier: GPL-2.0+ 2 3 /* 4 * NXP FlexSPI(FSPI) controller driver. 5 * 6 * Copyright 2019-2020 NXP 7 * Copyright 2020 Puresoftware Ltd. 8 * 9 * FlexSPI is a flexsible SPI host controller which supports two SPI 10 * channels and up to 4 external devices. Each channel supports 11 * Single/Dual/Quad/Octal mode data transfer (1/2/4/8 bidirectional 12 * data lines). 13 * 14 * FlexSPI controller is driven by the LUT(Look-up Table) registers 15 * LUT registers are a look-up-table for sequences of instructions. 16 * A valid sequence consists of four LUT registers. 17 * Maximum 32 LUT sequences can be programmed simultaneously. 18 * 19 * LUTs are being created at run-time based on the commands passed 20 * from the spi-mem framework, thus using single LUT index. 21 * 22 * Software triggered Flash read/write access by IP Bus. 23 * 24 * Memory mapped read access by AHB Bus. 25 * 26 * Based on SPI MEM interface and spi-fsl-qspi.c driver. 27 * 28 * Author: 29 * Yogesh Narayan Gaur <yogeshnarayan.gaur@nxp.com> 30 * Boris Brezillon <bbrezillon@kernel.org> 31 * Frieder Schrempf <frieder.schrempf@kontron.de> 32 */ 33 34 #include <linux/acpi.h> 35 #include <linux/bitops.h> 36 #include <linux/clk.h> 37 #include <linux/completion.h> 38 #include <linux/delay.h> 39 #include <linux/err.h> 40 #include <linux/errno.h> 41 #include <linux/interrupt.h> 42 #include <linux/io.h> 43 #include <linux/iopoll.h> 44 #include <linux/jiffies.h> 45 #include <linux/kernel.h> 46 #include <linux/module.h> 47 #include <linux/mutex.h> 48 #include <linux/of.h> 49 #include <linux/of_device.h> 50 #include <linux/platform_device.h> 51 #include <linux/pm_qos.h> 52 #include <linux/regmap.h> 53 #include <linux/sizes.h> 54 #include <linux/sys_soc.h> 55 56 #include <linux/mfd/syscon.h> 57 #include <linux/spi/spi.h> 58 #include <linux/spi/spi-mem.h> 59 60 /* 61 * The driver only uses one single LUT entry, that is updated on 62 * each call of exec_op(). Index 0 is preset at boot with a basic 63 * read operation, so let's use the last entry (31). 64 */ 65 #define SEQID_LUT 31 66 67 /* Registers used by the driver */ 68 #define FSPI_MCR0 0x00 69 #define FSPI_MCR0_AHB_TIMEOUT(x) ((x) << 24) 70 #define FSPI_MCR0_IP_TIMEOUT(x) ((x) << 16) 71 #define FSPI_MCR0_LEARN_EN BIT(15) 72 #define FSPI_MCR0_SCRFRUN_EN BIT(14) 73 #define FSPI_MCR0_OCTCOMB_EN BIT(13) 74 #define FSPI_MCR0_DOZE_EN BIT(12) 75 #define FSPI_MCR0_HSEN BIT(11) 76 #define FSPI_MCR0_SERCLKDIV BIT(8) 77 #define FSPI_MCR0_ATDF_EN BIT(7) 78 #define FSPI_MCR0_ARDF_EN BIT(6) 79 #define FSPI_MCR0_RXCLKSRC(x) ((x) << 4) 80 #define FSPI_MCR0_END_CFG(x) ((x) << 2) 81 #define FSPI_MCR0_MDIS BIT(1) 82 #define FSPI_MCR0_SWRST BIT(0) 83 84 #define FSPI_MCR1 0x04 85 #define FSPI_MCR1_SEQ_TIMEOUT(x) ((x) << 16) 86 #define FSPI_MCR1_AHB_TIMEOUT(x) (x) 87 88 #define FSPI_MCR2 0x08 89 #define FSPI_MCR2_IDLE_WAIT(x) ((x) << 24) 90 #define FSPI_MCR2_SAMEDEVICEEN BIT(15) 91 #define FSPI_MCR2_CLRLRPHS BIT(14) 92 #define FSPI_MCR2_ABRDATSZ BIT(8) 93 #define FSPI_MCR2_ABRLEARN BIT(7) 94 #define FSPI_MCR2_ABR_READ BIT(6) 95 #define FSPI_MCR2_ABRWRITE BIT(5) 96 #define FSPI_MCR2_ABRDUMMY BIT(4) 97 #define FSPI_MCR2_ABR_MODE BIT(3) 98 #define FSPI_MCR2_ABRCADDR BIT(2) 99 #define FSPI_MCR2_ABRRADDR BIT(1) 100 #define FSPI_MCR2_ABR_CMD BIT(0) 101 102 #define FSPI_AHBCR 0x0c 103 #define FSPI_AHBCR_RDADDROPT BIT(6) 104 #define FSPI_AHBCR_PREF_EN BIT(5) 105 #define FSPI_AHBCR_BUFF_EN BIT(4) 106 #define FSPI_AHBCR_CACH_EN BIT(3) 107 #define FSPI_AHBCR_CLRTXBUF BIT(2) 108 #define FSPI_AHBCR_CLRRXBUF BIT(1) 109 #define FSPI_AHBCR_PAR_EN BIT(0) 110 111 #define FSPI_INTEN 0x10 112 #define FSPI_INTEN_SCLKSBWR BIT(9) 113 #define FSPI_INTEN_SCLKSBRD BIT(8) 114 #define FSPI_INTEN_DATALRNFL BIT(7) 115 #define FSPI_INTEN_IPTXWE BIT(6) 116 #define FSPI_INTEN_IPRXWA BIT(5) 117 #define FSPI_INTEN_AHBCMDERR BIT(4) 118 #define FSPI_INTEN_IPCMDERR BIT(3) 119 #define FSPI_INTEN_AHBCMDGE BIT(2) 120 #define FSPI_INTEN_IPCMDGE BIT(1) 121 #define FSPI_INTEN_IPCMDDONE BIT(0) 122 123 #define FSPI_INTR 0x14 124 #define FSPI_INTR_SCLKSBWR BIT(9) 125 #define FSPI_INTR_SCLKSBRD BIT(8) 126 #define FSPI_INTR_DATALRNFL BIT(7) 127 #define FSPI_INTR_IPTXWE BIT(6) 128 #define FSPI_INTR_IPRXWA BIT(5) 129 #define FSPI_INTR_AHBCMDERR BIT(4) 130 #define FSPI_INTR_IPCMDERR BIT(3) 131 #define FSPI_INTR_AHBCMDGE BIT(2) 132 #define FSPI_INTR_IPCMDGE BIT(1) 133 #define FSPI_INTR_IPCMDDONE BIT(0) 134 135 #define FSPI_LUTKEY 0x18 136 #define FSPI_LUTKEY_VALUE 0x5AF05AF0 137 138 #define FSPI_LCKCR 0x1C 139 140 #define FSPI_LCKER_LOCK 0x1 141 #define FSPI_LCKER_UNLOCK 0x2 142 143 #define FSPI_BUFXCR_INVALID_MSTRID 0xE 144 #define FSPI_AHBRX_BUF0CR0 0x20 145 #define FSPI_AHBRX_BUF1CR0 0x24 146 #define FSPI_AHBRX_BUF2CR0 0x28 147 #define FSPI_AHBRX_BUF3CR0 0x2C 148 #define FSPI_AHBRX_BUF4CR0 0x30 149 #define FSPI_AHBRX_BUF5CR0 0x34 150 #define FSPI_AHBRX_BUF6CR0 0x38 151 #define FSPI_AHBRX_BUF7CR0 0x3C 152 #define FSPI_AHBRXBUF0CR7_PREF BIT(31) 153 154 #define FSPI_AHBRX_BUF0CR1 0x40 155 #define FSPI_AHBRX_BUF1CR1 0x44 156 #define FSPI_AHBRX_BUF2CR1 0x48 157 #define FSPI_AHBRX_BUF3CR1 0x4C 158 #define FSPI_AHBRX_BUF4CR1 0x50 159 #define FSPI_AHBRX_BUF5CR1 0x54 160 #define FSPI_AHBRX_BUF6CR1 0x58 161 #define FSPI_AHBRX_BUF7CR1 0x5C 162 163 #define FSPI_FLSHA1CR0 0x60 164 #define FSPI_FLSHA2CR0 0x64 165 #define FSPI_FLSHB1CR0 0x68 166 #define FSPI_FLSHB2CR0 0x6C 167 #define FSPI_FLSHXCR0_SZ_KB 10 168 #define FSPI_FLSHXCR0_SZ(x) ((x) >> FSPI_FLSHXCR0_SZ_KB) 169 170 #define FSPI_FLSHA1CR1 0x70 171 #define FSPI_FLSHA2CR1 0x74 172 #define FSPI_FLSHB1CR1 0x78 173 #define FSPI_FLSHB2CR1 0x7C 174 #define FSPI_FLSHXCR1_CSINTR(x) ((x) << 16) 175 #define FSPI_FLSHXCR1_CAS(x) ((x) << 11) 176 #define FSPI_FLSHXCR1_WA BIT(10) 177 #define FSPI_FLSHXCR1_TCSH(x) ((x) << 5) 178 #define FSPI_FLSHXCR1_TCSS(x) (x) 179 180 #define FSPI_FLSHA1CR2 0x80 181 #define FSPI_FLSHA2CR2 0x84 182 #define FSPI_FLSHB1CR2 0x88 183 #define FSPI_FLSHB2CR2 0x8C 184 #define FSPI_FLSHXCR2_CLRINSP BIT(24) 185 #define FSPI_FLSHXCR2_AWRWAIT BIT(16) 186 #define FSPI_FLSHXCR2_AWRSEQN_SHIFT 13 187 #define FSPI_FLSHXCR2_AWRSEQI_SHIFT 8 188 #define FSPI_FLSHXCR2_ARDSEQN_SHIFT 5 189 #define FSPI_FLSHXCR2_ARDSEQI_SHIFT 0 190 191 #define FSPI_IPCR0 0xA0 192 193 #define FSPI_IPCR1 0xA4 194 #define FSPI_IPCR1_IPAREN BIT(31) 195 #define FSPI_IPCR1_SEQNUM_SHIFT 24 196 #define FSPI_IPCR1_SEQID_SHIFT 16 197 #define FSPI_IPCR1_IDATSZ(x) (x) 198 199 #define FSPI_IPCMD 0xB0 200 #define FSPI_IPCMD_TRG BIT(0) 201 202 #define FSPI_DLPR 0xB4 203 204 #define FSPI_IPRXFCR 0xB8 205 #define FSPI_IPRXFCR_CLR BIT(0) 206 #define FSPI_IPRXFCR_DMA_EN BIT(1) 207 #define FSPI_IPRXFCR_WMRK(x) ((x) << 2) 208 209 #define FSPI_IPTXFCR 0xBC 210 #define FSPI_IPTXFCR_CLR BIT(0) 211 #define FSPI_IPTXFCR_DMA_EN BIT(1) 212 #define FSPI_IPTXFCR_WMRK(x) ((x) << 2) 213 214 #define FSPI_DLLACR 0xC0 215 #define FSPI_DLLACR_OVRDEN BIT(8) 216 217 #define FSPI_DLLBCR 0xC4 218 #define FSPI_DLLBCR_OVRDEN BIT(8) 219 220 #define FSPI_STS0 0xE0 221 #define FSPI_STS0_DLPHB(x) ((x) << 8) 222 #define FSPI_STS0_DLPHA(x) ((x) << 4) 223 #define FSPI_STS0_CMD_SRC(x) ((x) << 2) 224 #define FSPI_STS0_ARB_IDLE BIT(1) 225 #define FSPI_STS0_SEQ_IDLE BIT(0) 226 227 #define FSPI_STS1 0xE4 228 #define FSPI_STS1_IP_ERRCD(x) ((x) << 24) 229 #define FSPI_STS1_IP_ERRID(x) ((x) << 16) 230 #define FSPI_STS1_AHB_ERRCD(x) ((x) << 8) 231 #define FSPI_STS1_AHB_ERRID(x) (x) 232 233 #define FSPI_AHBSPNST 0xEC 234 #define FSPI_AHBSPNST_DATLFT(x) ((x) << 16) 235 #define FSPI_AHBSPNST_BUFID(x) ((x) << 1) 236 #define FSPI_AHBSPNST_ACTIVE BIT(0) 237 238 #define FSPI_IPRXFSTS 0xF0 239 #define FSPI_IPRXFSTS_RDCNTR(x) ((x) << 16) 240 #define FSPI_IPRXFSTS_FILL(x) (x) 241 242 #define FSPI_IPTXFSTS 0xF4 243 #define FSPI_IPTXFSTS_WRCNTR(x) ((x) << 16) 244 #define FSPI_IPTXFSTS_FILL(x) (x) 245 246 #define FSPI_RFDR 0x100 247 #define FSPI_TFDR 0x180 248 249 #define FSPI_LUT_BASE 0x200 250 #define FSPI_LUT_OFFSET (SEQID_LUT * 4 * 4) 251 #define FSPI_LUT_REG(idx) \ 252 (FSPI_LUT_BASE + FSPI_LUT_OFFSET + (idx) * 4) 253 254 /* register map end */ 255 256 /* Instruction set for the LUT register. */ 257 #define LUT_STOP 0x00 258 #define LUT_CMD 0x01 259 #define LUT_ADDR 0x02 260 #define LUT_CADDR_SDR 0x03 261 #define LUT_MODE 0x04 262 #define LUT_MODE2 0x05 263 #define LUT_MODE4 0x06 264 #define LUT_MODE8 0x07 265 #define LUT_NXP_WRITE 0x08 266 #define LUT_NXP_READ 0x09 267 #define LUT_LEARN_SDR 0x0A 268 #define LUT_DATSZ_SDR 0x0B 269 #define LUT_DUMMY 0x0C 270 #define LUT_DUMMY_RWDS_SDR 0x0D 271 #define LUT_JMP_ON_CS 0x1F 272 #define LUT_CMD_DDR 0x21 273 #define LUT_ADDR_DDR 0x22 274 #define LUT_CADDR_DDR 0x23 275 #define LUT_MODE_DDR 0x24 276 #define LUT_MODE2_DDR 0x25 277 #define LUT_MODE4_DDR 0x26 278 #define LUT_MODE8_DDR 0x27 279 #define LUT_WRITE_DDR 0x28 280 #define LUT_READ_DDR 0x29 281 #define LUT_LEARN_DDR 0x2A 282 #define LUT_DATSZ_DDR 0x2B 283 #define LUT_DUMMY_DDR 0x2C 284 #define LUT_DUMMY_RWDS_DDR 0x2D 285 286 /* 287 * Calculate number of required PAD bits for LUT register. 288 * 289 * The pad stands for the number of IO lines [0:7]. 290 * For example, the octal read needs eight IO lines, 291 * so you should use LUT_PAD(8). This macro 292 * returns 3 i.e. use eight (2^3) IP lines for read. 293 */ 294 #define LUT_PAD(x) (fls(x) - 1) 295 296 /* 297 * Macro for constructing the LUT entries with the following 298 * register layout: 299 * 300 * --------------------------------------------------- 301 * | INSTR1 | PAD1 | OPRND1 | INSTR0 | PAD0 | OPRND0 | 302 * --------------------------------------------------- 303 */ 304 #define PAD_SHIFT 8 305 #define INSTR_SHIFT 10 306 #define OPRND_SHIFT 16 307 308 /* Macros for constructing the LUT register. */ 309 #define LUT_DEF(idx, ins, pad, opr) \ 310 ((((ins) << INSTR_SHIFT) | ((pad) << PAD_SHIFT) | \ 311 (opr)) << (((idx) % 2) * OPRND_SHIFT)) 312 313 #define POLL_TOUT 5000 314 #define NXP_FSPI_MAX_CHIPSELECT 4 315 #define NXP_FSPI_MIN_IOMAP SZ_4M 316 317 #define DCFG_RCWSR1 0x100 318 319 /* Access flash memory using IP bus only */ 320 #define FSPI_QUIRK_USE_IP_ONLY BIT(0) 321 322 struct nxp_fspi_devtype_data { 323 unsigned int rxfifo; 324 unsigned int txfifo; 325 unsigned int ahb_buf_size; 326 unsigned int quirks; 327 bool little_endian; 328 }; 329 330 static struct nxp_fspi_devtype_data lx2160a_data = { 331 .rxfifo = SZ_512, /* (64 * 64 bits) */ 332 .txfifo = SZ_1K, /* (128 * 64 bits) */ 333 .ahb_buf_size = SZ_2K, /* (256 * 64 bits) */ 334 .quirks = 0, 335 .little_endian = true, /* little-endian */ 336 }; 337 338 static struct nxp_fspi_devtype_data imx8mm_data = { 339 .rxfifo = SZ_512, /* (64 * 64 bits) */ 340 .txfifo = SZ_1K, /* (128 * 64 bits) */ 341 .ahb_buf_size = SZ_2K, /* (256 * 64 bits) */ 342 .quirks = 0, 343 .little_endian = true, /* little-endian */ 344 }; 345 346 static struct nxp_fspi_devtype_data imx8qxp_data = { 347 .rxfifo = SZ_512, /* (64 * 64 bits) */ 348 .txfifo = SZ_1K, /* (128 * 64 bits) */ 349 .ahb_buf_size = SZ_2K, /* (256 * 64 bits) */ 350 .quirks = 0, 351 .little_endian = true, /* little-endian */ 352 }; 353 354 static struct nxp_fspi_devtype_data imx8dxl_data = { 355 .rxfifo = SZ_512, /* (64 * 64 bits) */ 356 .txfifo = SZ_1K, /* (128 * 64 bits) */ 357 .ahb_buf_size = SZ_2K, /* (256 * 64 bits) */ 358 .quirks = FSPI_QUIRK_USE_IP_ONLY, 359 .little_endian = true, /* little-endian */ 360 }; 361 362 struct nxp_fspi { 363 void __iomem *iobase; 364 void __iomem *ahb_addr; 365 u32 memmap_phy; 366 u32 memmap_phy_size; 367 u32 memmap_start; 368 u32 memmap_len; 369 struct clk *clk, *clk_en; 370 struct device *dev; 371 struct completion c; 372 struct nxp_fspi_devtype_data *devtype_data; 373 struct mutex lock; 374 struct pm_qos_request pm_qos_req; 375 int selected; 376 }; 377 378 static inline int needs_ip_only(struct nxp_fspi *f) 379 { 380 return f->devtype_data->quirks & FSPI_QUIRK_USE_IP_ONLY; 381 } 382 383 /* 384 * R/W functions for big- or little-endian registers: 385 * The FSPI controller's endianness is independent of 386 * the CPU core's endianness. So far, although the CPU 387 * core is little-endian the FSPI controller can use 388 * big-endian or little-endian. 389 */ 390 static void fspi_writel(struct nxp_fspi *f, u32 val, void __iomem *addr) 391 { 392 if (f->devtype_data->little_endian) 393 iowrite32(val, addr); 394 else 395 iowrite32be(val, addr); 396 } 397 398 static u32 fspi_readl(struct nxp_fspi *f, void __iomem *addr) 399 { 400 if (f->devtype_data->little_endian) 401 return ioread32(addr); 402 else 403 return ioread32be(addr); 404 } 405 406 static irqreturn_t nxp_fspi_irq_handler(int irq, void *dev_id) 407 { 408 struct nxp_fspi *f = dev_id; 409 u32 reg; 410 411 /* clear interrupt */ 412 reg = fspi_readl(f, f->iobase + FSPI_INTR); 413 fspi_writel(f, FSPI_INTR_IPCMDDONE, f->iobase + FSPI_INTR); 414 415 if (reg & FSPI_INTR_IPCMDDONE) 416 complete(&f->c); 417 418 return IRQ_HANDLED; 419 } 420 421 static int nxp_fspi_check_buswidth(struct nxp_fspi *f, u8 width) 422 { 423 switch (width) { 424 case 1: 425 case 2: 426 case 4: 427 case 8: 428 return 0; 429 } 430 431 return -ENOTSUPP; 432 } 433 434 static bool nxp_fspi_supports_op(struct spi_mem *mem, 435 const struct spi_mem_op *op) 436 { 437 struct nxp_fspi *f = spi_controller_get_devdata(mem->spi->master); 438 int ret; 439 440 ret = nxp_fspi_check_buswidth(f, op->cmd.buswidth); 441 442 if (op->addr.nbytes) 443 ret |= nxp_fspi_check_buswidth(f, op->addr.buswidth); 444 445 if (op->dummy.nbytes) 446 ret |= nxp_fspi_check_buswidth(f, op->dummy.buswidth); 447 448 if (op->data.nbytes) 449 ret |= nxp_fspi_check_buswidth(f, op->data.buswidth); 450 451 if (ret) 452 return false; 453 454 /* 455 * The number of address bytes should be equal to or less than 4 bytes. 456 */ 457 if (op->addr.nbytes > 4) 458 return false; 459 460 /* 461 * If requested address value is greater than controller assigned 462 * memory mapped space, return error as it didn't fit in the range 463 * of assigned address space. 464 */ 465 if (op->addr.val >= f->memmap_phy_size) 466 return false; 467 468 /* Max 64 dummy clock cycles supported */ 469 if (op->dummy.buswidth && 470 (op->dummy.nbytes * 8 / op->dummy.buswidth > 64)) 471 return false; 472 473 /* Max data length, check controller limits and alignment */ 474 if (op->data.dir == SPI_MEM_DATA_IN && 475 (op->data.nbytes > f->devtype_data->ahb_buf_size || 476 (op->data.nbytes > f->devtype_data->rxfifo - 4 && 477 !IS_ALIGNED(op->data.nbytes, 8)))) 478 return false; 479 480 if (op->data.dir == SPI_MEM_DATA_OUT && 481 op->data.nbytes > f->devtype_data->txfifo) 482 return false; 483 484 return spi_mem_default_supports_op(mem, op); 485 } 486 487 /* Instead of busy looping invoke readl_poll_timeout functionality. */ 488 static int fspi_readl_poll_tout(struct nxp_fspi *f, void __iomem *base, 489 u32 mask, u32 delay_us, 490 u32 timeout_us, bool c) 491 { 492 u32 reg; 493 494 if (!f->devtype_data->little_endian) 495 mask = (u32)cpu_to_be32(mask); 496 497 if (c) 498 return readl_poll_timeout(base, reg, (reg & mask), 499 delay_us, timeout_us); 500 else 501 return readl_poll_timeout(base, reg, !(reg & mask), 502 delay_us, timeout_us); 503 } 504 505 /* 506 * If the slave device content being changed by Write/Erase, need to 507 * invalidate the AHB buffer. This can be achieved by doing the reset 508 * of controller after setting MCR0[SWRESET] bit. 509 */ 510 static inline void nxp_fspi_invalid(struct nxp_fspi *f) 511 { 512 u32 reg; 513 int ret; 514 515 reg = fspi_readl(f, f->iobase + FSPI_MCR0); 516 fspi_writel(f, reg | FSPI_MCR0_SWRST, f->iobase + FSPI_MCR0); 517 518 /* w1c register, wait unit clear */ 519 ret = fspi_readl_poll_tout(f, f->iobase + FSPI_MCR0, 520 FSPI_MCR0_SWRST, 0, POLL_TOUT, false); 521 WARN_ON(ret); 522 } 523 524 static void nxp_fspi_prepare_lut(struct nxp_fspi *f, 525 const struct spi_mem_op *op) 526 { 527 void __iomem *base = f->iobase; 528 u32 lutval[4] = {}; 529 int lutidx = 1, i; 530 531 /* cmd */ 532 lutval[0] |= LUT_DEF(0, LUT_CMD, LUT_PAD(op->cmd.buswidth), 533 op->cmd.opcode); 534 535 /* addr bytes */ 536 if (op->addr.nbytes) { 537 lutval[lutidx / 2] |= LUT_DEF(lutidx, LUT_ADDR, 538 LUT_PAD(op->addr.buswidth), 539 op->addr.nbytes * 8); 540 lutidx++; 541 } 542 543 /* dummy bytes, if needed */ 544 if (op->dummy.nbytes) { 545 lutval[lutidx / 2] |= LUT_DEF(lutidx, LUT_DUMMY, 546 /* 547 * Due to FlexSPI controller limitation number of PAD for dummy 548 * buswidth needs to be programmed as equal to data buswidth. 549 */ 550 LUT_PAD(op->data.buswidth), 551 op->dummy.nbytes * 8 / 552 op->dummy.buswidth); 553 lutidx++; 554 } 555 556 /* read/write data bytes */ 557 if (op->data.nbytes) { 558 lutval[lutidx / 2] |= LUT_DEF(lutidx, 559 op->data.dir == SPI_MEM_DATA_IN ? 560 LUT_NXP_READ : LUT_NXP_WRITE, 561 LUT_PAD(op->data.buswidth), 562 0); 563 lutidx++; 564 } 565 566 /* stop condition. */ 567 lutval[lutidx / 2] |= LUT_DEF(lutidx, LUT_STOP, 0, 0); 568 569 /* unlock LUT */ 570 fspi_writel(f, FSPI_LUTKEY_VALUE, f->iobase + FSPI_LUTKEY); 571 fspi_writel(f, FSPI_LCKER_UNLOCK, f->iobase + FSPI_LCKCR); 572 573 /* fill LUT */ 574 for (i = 0; i < ARRAY_SIZE(lutval); i++) 575 fspi_writel(f, lutval[i], base + FSPI_LUT_REG(i)); 576 577 dev_dbg(f->dev, "CMD[%x] lutval[0:%x \t 1:%x \t 2:%x \t 3:%x], size: 0x%08x\n", 578 op->cmd.opcode, lutval[0], lutval[1], lutval[2], lutval[3], op->data.nbytes); 579 580 /* lock LUT */ 581 fspi_writel(f, FSPI_LUTKEY_VALUE, f->iobase + FSPI_LUTKEY); 582 fspi_writel(f, FSPI_LCKER_LOCK, f->iobase + FSPI_LCKCR); 583 } 584 585 static int nxp_fspi_clk_prep_enable(struct nxp_fspi *f) 586 { 587 int ret; 588 589 if (is_acpi_node(f->dev->fwnode)) 590 return 0; 591 592 ret = clk_prepare_enable(f->clk_en); 593 if (ret) 594 return ret; 595 596 ret = clk_prepare_enable(f->clk); 597 if (ret) { 598 clk_disable_unprepare(f->clk_en); 599 return ret; 600 } 601 602 return 0; 603 } 604 605 static int nxp_fspi_clk_disable_unprep(struct nxp_fspi *f) 606 { 607 if (is_acpi_node(f->dev->fwnode)) 608 return 0; 609 610 clk_disable_unprepare(f->clk); 611 clk_disable_unprepare(f->clk_en); 612 613 return 0; 614 } 615 616 /* 617 * In FlexSPI controller, flash access is based on value of FSPI_FLSHXXCR0 618 * register and start base address of the slave device. 619 * 620 * (Higher address) 621 * -------- <-- FLSHB2CR0 622 * | B2 | 623 * | | 624 * B2 start address --> -------- <-- FLSHB1CR0 625 * | B1 | 626 * | | 627 * B1 start address --> -------- <-- FLSHA2CR0 628 * | A2 | 629 * | | 630 * A2 start address --> -------- <-- FLSHA1CR0 631 * | A1 | 632 * | | 633 * A1 start address --> -------- (Lower address) 634 * 635 * 636 * Start base address defines the starting address range for given CS and 637 * FSPI_FLSHXXCR0 defines the size of the slave device connected at given CS. 638 * 639 * But, different targets are having different combinations of number of CS, 640 * some targets only have single CS or two CS covering controller's full 641 * memory mapped space area. 642 * Thus, implementation is being done as independent of the size and number 643 * of the connected slave device. 644 * Assign controller memory mapped space size as the size to the connected 645 * slave device. 646 * Mark FLSHxxCR0 as zero initially and then assign value only to the selected 647 * chip-select Flash configuration register. 648 * 649 * For e.g. to access CS2 (B1), FLSHB1CR0 register would be equal to the 650 * memory mapped size of the controller. 651 * Value for rest of the CS FLSHxxCR0 register would be zero. 652 * 653 */ 654 static void nxp_fspi_select_mem(struct nxp_fspi *f, struct spi_device *spi) 655 { 656 unsigned long rate = spi->max_speed_hz; 657 int ret; 658 uint64_t size_kb; 659 660 /* 661 * Return, if previously selected slave device is same as current 662 * requested slave device. 663 */ 664 if (f->selected == spi->chip_select) 665 return; 666 667 /* Reset FLSHxxCR0 registers */ 668 fspi_writel(f, 0, f->iobase + FSPI_FLSHA1CR0); 669 fspi_writel(f, 0, f->iobase + FSPI_FLSHA2CR0); 670 fspi_writel(f, 0, f->iobase + FSPI_FLSHB1CR0); 671 fspi_writel(f, 0, f->iobase + FSPI_FLSHB2CR0); 672 673 /* Assign controller memory mapped space as size, KBytes, of flash. */ 674 size_kb = FSPI_FLSHXCR0_SZ(f->memmap_phy_size); 675 676 fspi_writel(f, size_kb, f->iobase + FSPI_FLSHA1CR0 + 677 4 * spi->chip_select); 678 679 dev_dbg(f->dev, "Slave device [CS:%x] selected\n", spi->chip_select); 680 681 nxp_fspi_clk_disable_unprep(f); 682 683 ret = clk_set_rate(f->clk, rate); 684 if (ret) 685 return; 686 687 ret = nxp_fspi_clk_prep_enable(f); 688 if (ret) 689 return; 690 691 f->selected = spi->chip_select; 692 } 693 694 static int nxp_fspi_read_ahb(struct nxp_fspi *f, const struct spi_mem_op *op) 695 { 696 u32 start = op->addr.val; 697 u32 len = op->data.nbytes; 698 699 /* if necessary, ioremap before AHB read */ 700 if ((!f->ahb_addr) || start < f->memmap_start || 701 start + len > f->memmap_start + f->memmap_len) { 702 if (f->ahb_addr) 703 iounmap(f->ahb_addr); 704 705 f->memmap_start = start; 706 f->memmap_len = len > NXP_FSPI_MIN_IOMAP ? 707 len : NXP_FSPI_MIN_IOMAP; 708 709 f->ahb_addr = ioremap_wc(f->memmap_phy + f->memmap_start, 710 f->memmap_len); 711 712 if (!f->ahb_addr) { 713 dev_err(f->dev, "failed to alloc memory\n"); 714 return -ENOMEM; 715 } 716 } 717 718 /* Read out the data directly from the AHB buffer. */ 719 memcpy_fromio(op->data.buf.in, 720 f->ahb_addr + start - f->memmap_start, len); 721 722 return 0; 723 } 724 725 static void nxp_fspi_fill_txfifo(struct nxp_fspi *f, 726 const struct spi_mem_op *op) 727 { 728 void __iomem *base = f->iobase; 729 int i, ret; 730 u8 *buf = (u8 *) op->data.buf.out; 731 732 /* clear the TX FIFO. */ 733 fspi_writel(f, FSPI_IPTXFCR_CLR, base + FSPI_IPTXFCR); 734 735 /* 736 * Default value of water mark level is 8 bytes, hence in single 737 * write request controller can write max 8 bytes of data. 738 */ 739 740 for (i = 0; i < ALIGN_DOWN(op->data.nbytes, 8); i += 8) { 741 /* Wait for TXFIFO empty */ 742 ret = fspi_readl_poll_tout(f, f->iobase + FSPI_INTR, 743 FSPI_INTR_IPTXWE, 0, 744 POLL_TOUT, true); 745 WARN_ON(ret); 746 747 fspi_writel(f, *(u32 *) (buf + i), base + FSPI_TFDR); 748 fspi_writel(f, *(u32 *) (buf + i + 4), base + FSPI_TFDR + 4); 749 fspi_writel(f, FSPI_INTR_IPTXWE, base + FSPI_INTR); 750 } 751 752 if (i < op->data.nbytes) { 753 u32 data = 0; 754 int j; 755 /* Wait for TXFIFO empty */ 756 ret = fspi_readl_poll_tout(f, f->iobase + FSPI_INTR, 757 FSPI_INTR_IPTXWE, 0, 758 POLL_TOUT, true); 759 WARN_ON(ret); 760 761 for (j = 0; j < ALIGN(op->data.nbytes - i, 4); j += 4) { 762 memcpy(&data, buf + i + j, 4); 763 fspi_writel(f, data, base + FSPI_TFDR + j); 764 } 765 fspi_writel(f, FSPI_INTR_IPTXWE, base + FSPI_INTR); 766 } 767 } 768 769 static void nxp_fspi_read_rxfifo(struct nxp_fspi *f, 770 const struct spi_mem_op *op) 771 { 772 void __iomem *base = f->iobase; 773 int i, ret; 774 int len = op->data.nbytes; 775 u8 *buf = (u8 *) op->data.buf.in; 776 777 /* 778 * Default value of water mark level is 8 bytes, hence in single 779 * read request controller can read max 8 bytes of data. 780 */ 781 for (i = 0; i < ALIGN_DOWN(len, 8); i += 8) { 782 /* Wait for RXFIFO available */ 783 ret = fspi_readl_poll_tout(f, f->iobase + FSPI_INTR, 784 FSPI_INTR_IPRXWA, 0, 785 POLL_TOUT, true); 786 WARN_ON(ret); 787 788 *(u32 *)(buf + i) = fspi_readl(f, base + FSPI_RFDR); 789 *(u32 *)(buf + i + 4) = fspi_readl(f, base + FSPI_RFDR + 4); 790 /* move the FIFO pointer */ 791 fspi_writel(f, FSPI_INTR_IPRXWA, base + FSPI_INTR); 792 } 793 794 if (i < len) { 795 u32 tmp; 796 int size, j; 797 798 buf = op->data.buf.in + i; 799 /* Wait for RXFIFO available */ 800 ret = fspi_readl_poll_tout(f, f->iobase + FSPI_INTR, 801 FSPI_INTR_IPRXWA, 0, 802 POLL_TOUT, true); 803 WARN_ON(ret); 804 805 len = op->data.nbytes - i; 806 for (j = 0; j < op->data.nbytes - i; j += 4) { 807 tmp = fspi_readl(f, base + FSPI_RFDR + j); 808 size = min(len, 4); 809 memcpy(buf + j, &tmp, size); 810 len -= size; 811 } 812 } 813 814 /* invalid the RXFIFO */ 815 fspi_writel(f, FSPI_IPRXFCR_CLR, base + FSPI_IPRXFCR); 816 /* move the FIFO pointer */ 817 fspi_writel(f, FSPI_INTR_IPRXWA, base + FSPI_INTR); 818 } 819 820 static int nxp_fspi_do_op(struct nxp_fspi *f, const struct spi_mem_op *op) 821 { 822 void __iomem *base = f->iobase; 823 int seqnum = 0; 824 int err = 0; 825 u32 reg; 826 827 reg = fspi_readl(f, base + FSPI_IPRXFCR); 828 /* invalid RXFIFO first */ 829 reg &= ~FSPI_IPRXFCR_DMA_EN; 830 reg = reg | FSPI_IPRXFCR_CLR; 831 fspi_writel(f, reg, base + FSPI_IPRXFCR); 832 833 init_completion(&f->c); 834 835 fspi_writel(f, op->addr.val, base + FSPI_IPCR0); 836 /* 837 * Always start the sequence at the same index since we update 838 * the LUT at each exec_op() call. And also specify the DATA 839 * length, since it's has not been specified in the LUT. 840 */ 841 fspi_writel(f, op->data.nbytes | 842 (SEQID_LUT << FSPI_IPCR1_SEQID_SHIFT) | 843 (seqnum << FSPI_IPCR1_SEQNUM_SHIFT), 844 base + FSPI_IPCR1); 845 846 /* Trigger the LUT now. */ 847 fspi_writel(f, FSPI_IPCMD_TRG, base + FSPI_IPCMD); 848 849 /* Wait for the interrupt. */ 850 if (!wait_for_completion_timeout(&f->c, msecs_to_jiffies(1000))) 851 err = -ETIMEDOUT; 852 853 /* Invoke IP data read, if request is of data read. */ 854 if (!err && op->data.nbytes && op->data.dir == SPI_MEM_DATA_IN) 855 nxp_fspi_read_rxfifo(f, op); 856 857 return err; 858 } 859 860 static int nxp_fspi_exec_op(struct spi_mem *mem, const struct spi_mem_op *op) 861 { 862 struct nxp_fspi *f = spi_controller_get_devdata(mem->spi->master); 863 int err = 0; 864 865 mutex_lock(&f->lock); 866 867 /* Wait for controller being ready. */ 868 err = fspi_readl_poll_tout(f, f->iobase + FSPI_STS0, 869 FSPI_STS0_ARB_IDLE, 1, POLL_TOUT, true); 870 WARN_ON(err); 871 872 nxp_fspi_select_mem(f, mem->spi); 873 874 nxp_fspi_prepare_lut(f, op); 875 /* 876 * If we have large chunks of data, we read them through the AHB bus by 877 * accessing the mapped memory. In all other cases we use IP commands 878 * to access the flash. Read via AHB bus may be corrupted due to 879 * existence of an errata and therefore discard AHB read in such cases. 880 */ 881 if (op->data.nbytes > (f->devtype_data->rxfifo - 4) && 882 op->data.dir == SPI_MEM_DATA_IN && 883 !needs_ip_only(f)) { 884 err = nxp_fspi_read_ahb(f, op); 885 } else { 886 if (op->data.nbytes && op->data.dir == SPI_MEM_DATA_OUT) 887 nxp_fspi_fill_txfifo(f, op); 888 889 err = nxp_fspi_do_op(f, op); 890 } 891 892 /* Invalidate the data in the AHB buffer. */ 893 nxp_fspi_invalid(f); 894 895 mutex_unlock(&f->lock); 896 897 return err; 898 } 899 900 static int nxp_fspi_adjust_op_size(struct spi_mem *mem, struct spi_mem_op *op) 901 { 902 struct nxp_fspi *f = spi_controller_get_devdata(mem->spi->master); 903 904 if (op->data.dir == SPI_MEM_DATA_OUT) { 905 if (op->data.nbytes > f->devtype_data->txfifo) 906 op->data.nbytes = f->devtype_data->txfifo; 907 } else { 908 if (op->data.nbytes > f->devtype_data->ahb_buf_size) 909 op->data.nbytes = f->devtype_data->ahb_buf_size; 910 else if (op->data.nbytes > (f->devtype_data->rxfifo - 4)) 911 op->data.nbytes = ALIGN_DOWN(op->data.nbytes, 8); 912 } 913 914 /* Limit data bytes to RX FIFO in case of IP read only */ 915 if (op->data.dir == SPI_MEM_DATA_IN && 916 needs_ip_only(f) && 917 op->data.nbytes > f->devtype_data->rxfifo) 918 op->data.nbytes = f->devtype_data->rxfifo; 919 920 return 0; 921 } 922 923 static void erratum_err050568(struct nxp_fspi *f) 924 { 925 const struct soc_device_attribute ls1028a_soc_attr[] = { 926 { .family = "QorIQ LS1028A" }, 927 { /* sentinel */ } 928 }; 929 struct device_node *np; 930 struct regmap *map; 931 u32 val = 0, sysclk = 0; 932 int ret; 933 934 /* Check for LS1028A family */ 935 if (!soc_device_match(ls1028a_soc_attr)) { 936 dev_dbg(f->dev, "Errata applicable only for LS1028A\n"); 937 return; 938 } 939 940 /* Compute system clock frequency multiplier ratio */ 941 map = syscon_regmap_lookup_by_compatible("fsl,ls1028a-dcfg"); 942 if (IS_ERR(map)) { 943 dev_err(f->dev, "No syscon regmap\n"); 944 goto err; 945 } 946 947 ret = regmap_read(map, DCFG_RCWSR1, &val); 948 if (ret < 0) 949 goto err; 950 951 /* Strap bits 6:2 define SYS_PLL_RAT i.e frequency multiplier ratio */ 952 val = (val >> 2) & 0x1F; 953 WARN(val == 0, "Strapping is zero: Cannot determine ratio"); 954 955 /* Compute system clock frequency */ 956 np = of_find_node_by_name(NULL, "clock-sysclk"); 957 if (!np) 958 goto err; 959 960 if (of_property_read_u32(np, "clock-frequency", &sysclk)) 961 goto err; 962 963 sysclk = (sysclk * val) / 1000000; /* Convert sysclk to Mhz */ 964 dev_dbg(f->dev, "val: 0x%08x, sysclk: %dMhz\n", val, sysclk); 965 966 /* Use IP bus only if PLL is 300MHz */ 967 if (sysclk == 300) 968 f->devtype_data->quirks |= FSPI_QUIRK_USE_IP_ONLY; 969 970 return; 971 972 err: 973 dev_err(f->dev, "Errata cannot be executed. Read via IP bus may not work\n"); 974 } 975 976 static int nxp_fspi_default_setup(struct nxp_fspi *f) 977 { 978 void __iomem *base = f->iobase; 979 int ret, i; 980 u32 reg; 981 982 /* disable and unprepare clock to avoid glitch pass to controller */ 983 nxp_fspi_clk_disable_unprep(f); 984 985 /* the default frequency, we will change it later if necessary. */ 986 ret = clk_set_rate(f->clk, 20000000); 987 if (ret) 988 return ret; 989 990 ret = nxp_fspi_clk_prep_enable(f); 991 if (ret) 992 return ret; 993 994 /* 995 * ERR050568: Flash access by FlexSPI AHB command may not work with 996 * platform frequency equal to 300 MHz on LS1028A. 997 * LS1028A reuses LX2160A compatible entry. Make errata applicable for 998 * Layerscape LS1028A platform. 999 */ 1000 if (of_device_is_compatible(f->dev->of_node, "nxp,lx2160a-fspi")) 1001 erratum_err050568(f); 1002 1003 /* Reset the module */ 1004 /* w1c register, wait unit clear */ 1005 ret = fspi_readl_poll_tout(f, f->iobase + FSPI_MCR0, 1006 FSPI_MCR0_SWRST, 0, POLL_TOUT, false); 1007 WARN_ON(ret); 1008 1009 /* Disable the module */ 1010 fspi_writel(f, FSPI_MCR0_MDIS, base + FSPI_MCR0); 1011 1012 /* Reset the DLL register to default value */ 1013 fspi_writel(f, FSPI_DLLACR_OVRDEN, base + FSPI_DLLACR); 1014 fspi_writel(f, FSPI_DLLBCR_OVRDEN, base + FSPI_DLLBCR); 1015 1016 /* enable module */ 1017 fspi_writel(f, FSPI_MCR0_AHB_TIMEOUT(0xFF) | 1018 FSPI_MCR0_IP_TIMEOUT(0xFF) | (u32) FSPI_MCR0_OCTCOMB_EN, 1019 base + FSPI_MCR0); 1020 1021 /* 1022 * Disable same device enable bit and configure all slave devices 1023 * independently. 1024 */ 1025 reg = fspi_readl(f, f->iobase + FSPI_MCR2); 1026 reg = reg & ~(FSPI_MCR2_SAMEDEVICEEN); 1027 fspi_writel(f, reg, base + FSPI_MCR2); 1028 1029 /* AHB configuration for access buffer 0~7. */ 1030 for (i = 0; i < 7; i++) 1031 fspi_writel(f, 0, base + FSPI_AHBRX_BUF0CR0 + 4 * i); 1032 1033 /* 1034 * Set ADATSZ with the maximum AHB buffer size to improve the read 1035 * performance. 1036 */ 1037 fspi_writel(f, (f->devtype_data->ahb_buf_size / 8 | 1038 FSPI_AHBRXBUF0CR7_PREF), base + FSPI_AHBRX_BUF7CR0); 1039 1040 /* prefetch and no start address alignment limitation */ 1041 fspi_writel(f, FSPI_AHBCR_PREF_EN | FSPI_AHBCR_RDADDROPT, 1042 base + FSPI_AHBCR); 1043 1044 /* AHB Read - Set lut sequence ID for all CS. */ 1045 fspi_writel(f, SEQID_LUT, base + FSPI_FLSHA1CR2); 1046 fspi_writel(f, SEQID_LUT, base + FSPI_FLSHA2CR2); 1047 fspi_writel(f, SEQID_LUT, base + FSPI_FLSHB1CR2); 1048 fspi_writel(f, SEQID_LUT, base + FSPI_FLSHB2CR2); 1049 1050 f->selected = -1; 1051 1052 /* enable the interrupt */ 1053 fspi_writel(f, FSPI_INTEN_IPCMDDONE, base + FSPI_INTEN); 1054 1055 return 0; 1056 } 1057 1058 static const char *nxp_fspi_get_name(struct spi_mem *mem) 1059 { 1060 struct nxp_fspi *f = spi_controller_get_devdata(mem->spi->master); 1061 struct device *dev = &mem->spi->dev; 1062 const char *name; 1063 1064 // Set custom name derived from the platform_device of the controller. 1065 if (of_get_available_child_count(f->dev->of_node) == 1) 1066 return dev_name(f->dev); 1067 1068 name = devm_kasprintf(dev, GFP_KERNEL, 1069 "%s-%d", dev_name(f->dev), 1070 mem->spi->chip_select); 1071 1072 if (!name) { 1073 dev_err(dev, "failed to get memory for custom flash name\n"); 1074 return ERR_PTR(-ENOMEM); 1075 } 1076 1077 return name; 1078 } 1079 1080 static const struct spi_controller_mem_ops nxp_fspi_mem_ops = { 1081 .adjust_op_size = nxp_fspi_adjust_op_size, 1082 .supports_op = nxp_fspi_supports_op, 1083 .exec_op = nxp_fspi_exec_op, 1084 .get_name = nxp_fspi_get_name, 1085 }; 1086 1087 static int nxp_fspi_probe(struct platform_device *pdev) 1088 { 1089 struct spi_controller *ctlr; 1090 struct device *dev = &pdev->dev; 1091 struct device_node *np = dev->of_node; 1092 struct resource *res; 1093 struct nxp_fspi *f; 1094 int ret; 1095 u32 reg; 1096 1097 ctlr = spi_alloc_master(&pdev->dev, sizeof(*f)); 1098 if (!ctlr) 1099 return -ENOMEM; 1100 1101 ctlr->mode_bits = SPI_RX_DUAL | SPI_RX_QUAD | SPI_RX_OCTAL | 1102 SPI_TX_DUAL | SPI_TX_QUAD | SPI_TX_OCTAL; 1103 1104 f = spi_controller_get_devdata(ctlr); 1105 f->dev = dev; 1106 f->devtype_data = (struct nxp_fspi_devtype_data *)device_get_match_data(dev); 1107 if (!f->devtype_data) { 1108 ret = -ENODEV; 1109 goto err_put_ctrl; 1110 } 1111 1112 platform_set_drvdata(pdev, f); 1113 1114 /* find the resources - configuration register address space */ 1115 if (is_acpi_node(f->dev->fwnode)) 1116 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1117 else 1118 res = platform_get_resource_byname(pdev, 1119 IORESOURCE_MEM, "fspi_base"); 1120 1121 f->iobase = devm_ioremap_resource(dev, res); 1122 if (IS_ERR(f->iobase)) { 1123 ret = PTR_ERR(f->iobase); 1124 goto err_put_ctrl; 1125 } 1126 1127 /* find the resources - controller memory mapped space */ 1128 if (is_acpi_node(f->dev->fwnode)) 1129 res = platform_get_resource(pdev, IORESOURCE_MEM, 1); 1130 else 1131 res = platform_get_resource_byname(pdev, 1132 IORESOURCE_MEM, "fspi_mmap"); 1133 1134 if (!res) { 1135 ret = -ENODEV; 1136 goto err_put_ctrl; 1137 } 1138 1139 /* assign memory mapped starting address and mapped size. */ 1140 f->memmap_phy = res->start; 1141 f->memmap_phy_size = resource_size(res); 1142 1143 /* find the clocks */ 1144 if (dev_of_node(&pdev->dev)) { 1145 f->clk_en = devm_clk_get(dev, "fspi_en"); 1146 if (IS_ERR(f->clk_en)) { 1147 ret = PTR_ERR(f->clk_en); 1148 goto err_put_ctrl; 1149 } 1150 1151 f->clk = devm_clk_get(dev, "fspi"); 1152 if (IS_ERR(f->clk)) { 1153 ret = PTR_ERR(f->clk); 1154 goto err_put_ctrl; 1155 } 1156 1157 ret = nxp_fspi_clk_prep_enable(f); 1158 if (ret) { 1159 dev_err(dev, "can not enable the clock\n"); 1160 goto err_put_ctrl; 1161 } 1162 } 1163 1164 /* Clear potential interrupts */ 1165 reg = fspi_readl(f, f->iobase + FSPI_INTR); 1166 if (reg) 1167 fspi_writel(f, reg, f->iobase + FSPI_INTR); 1168 1169 /* find the irq */ 1170 ret = platform_get_irq(pdev, 0); 1171 if (ret < 0) 1172 goto err_disable_clk; 1173 1174 ret = devm_request_irq(dev, ret, 1175 nxp_fspi_irq_handler, 0, pdev->name, f); 1176 if (ret) { 1177 dev_err(dev, "failed to request irq: %d\n", ret); 1178 goto err_disable_clk; 1179 } 1180 1181 mutex_init(&f->lock); 1182 1183 ctlr->bus_num = -1; 1184 ctlr->num_chipselect = NXP_FSPI_MAX_CHIPSELECT; 1185 ctlr->mem_ops = &nxp_fspi_mem_ops; 1186 1187 nxp_fspi_default_setup(f); 1188 1189 ctlr->dev.of_node = np; 1190 1191 ret = devm_spi_register_controller(&pdev->dev, ctlr); 1192 if (ret) 1193 goto err_destroy_mutex; 1194 1195 return 0; 1196 1197 err_destroy_mutex: 1198 mutex_destroy(&f->lock); 1199 1200 err_disable_clk: 1201 nxp_fspi_clk_disable_unprep(f); 1202 1203 err_put_ctrl: 1204 spi_controller_put(ctlr); 1205 1206 dev_err(dev, "NXP FSPI probe failed\n"); 1207 return ret; 1208 } 1209 1210 static int nxp_fspi_remove(struct platform_device *pdev) 1211 { 1212 struct nxp_fspi *f = platform_get_drvdata(pdev); 1213 1214 /* disable the hardware */ 1215 fspi_writel(f, FSPI_MCR0_MDIS, f->iobase + FSPI_MCR0); 1216 1217 nxp_fspi_clk_disable_unprep(f); 1218 1219 mutex_destroy(&f->lock); 1220 1221 if (f->ahb_addr) 1222 iounmap(f->ahb_addr); 1223 1224 return 0; 1225 } 1226 1227 static int nxp_fspi_suspend(struct device *dev) 1228 { 1229 return 0; 1230 } 1231 1232 static int nxp_fspi_resume(struct device *dev) 1233 { 1234 struct nxp_fspi *f = dev_get_drvdata(dev); 1235 1236 nxp_fspi_default_setup(f); 1237 1238 return 0; 1239 } 1240 1241 static const struct of_device_id nxp_fspi_dt_ids[] = { 1242 { .compatible = "nxp,lx2160a-fspi", .data = (void *)&lx2160a_data, }, 1243 { .compatible = "nxp,imx8mm-fspi", .data = (void *)&imx8mm_data, }, 1244 { .compatible = "nxp,imx8mp-fspi", .data = (void *)&imx8mm_data, }, 1245 { .compatible = "nxp,imx8qxp-fspi", .data = (void *)&imx8qxp_data, }, 1246 { .compatible = "nxp,imx8dxl-fspi", .data = (void *)&imx8dxl_data, }, 1247 { /* sentinel */ } 1248 }; 1249 MODULE_DEVICE_TABLE(of, nxp_fspi_dt_ids); 1250 1251 #ifdef CONFIG_ACPI 1252 static const struct acpi_device_id nxp_fspi_acpi_ids[] = { 1253 { "NXP0009", .driver_data = (kernel_ulong_t)&lx2160a_data, }, 1254 {} 1255 }; 1256 MODULE_DEVICE_TABLE(acpi, nxp_fspi_acpi_ids); 1257 #endif 1258 1259 static const struct dev_pm_ops nxp_fspi_pm_ops = { 1260 .suspend = nxp_fspi_suspend, 1261 .resume = nxp_fspi_resume, 1262 }; 1263 1264 static struct platform_driver nxp_fspi_driver = { 1265 .driver = { 1266 .name = "nxp-fspi", 1267 .of_match_table = nxp_fspi_dt_ids, 1268 .acpi_match_table = ACPI_PTR(nxp_fspi_acpi_ids), 1269 .pm = &nxp_fspi_pm_ops, 1270 }, 1271 .probe = nxp_fspi_probe, 1272 .remove = nxp_fspi_remove, 1273 }; 1274 module_platform_driver(nxp_fspi_driver); 1275 1276 MODULE_DESCRIPTION("NXP FSPI Controller Driver"); 1277 MODULE_AUTHOR("NXP Semiconductor"); 1278 MODULE_AUTHOR("Yogesh Narayan Gaur <yogeshnarayan.gaur@nxp.com>"); 1279 MODULE_AUTHOR("Boris Brezillon <bbrezillon@kernel.org>"); 1280 MODULE_AUTHOR("Frieder Schrempf <frieder.schrempf@kontron.de>"); 1281 MODULE_LICENSE("GPL v2"); 1282