1 // SPDX-License-Identifier: GPL-2.0+
3 * NXP FlexSPI(FSPI) controller driver.
5 * Copyright (c) 2019 Michael Walle <michael@walle.cc>
6 * Copyright (c) 2019 NXP
8 * This driver was originally ported from the linux kernel v5.4-rc3, which had
11 * FlexSPI is a flexsible SPI host controller which supports two SPI
12 * channels and up to 4 external devices. Each channel supports
13 * Single/Dual/Quad/Octal mode data transfer (1/2/4/8 bidirectional
16 * FlexSPI controller is driven by the LUT(Look-up Table) registers
17 * LUT registers are a look-up-table for sequences of instructions.
18 * A valid sequence consists of four LUT registers.
19 * Maximum 32 LUT sequences can be programmed simultaneously.
21 * LUTs are being created at run-time based on the commands passed
22 * from the spi-mem framework, thus using single LUT index.
24 * Software triggered Flash read/write access by IP Bus.
26 * Memory mapped read access by AHB Bus.
28 * Based on SPI MEM interface and spi-fsl-qspi.c driver.
31 * Yogesh Narayan Gaur <yogeshnarayan.gaur@nxp.com>
32 * Boris Brezillon <bbrezillon@kernel.org>
33 * Frieder Schrempf <frieder.schrempf@kontron.de>
43 #include <linux/kernel.h>
44 #include <linux/sizes.h>
45 #include <linux/iopoll.h>
46 #include <linux/bug.h>
49 * The driver only uses one single LUT entry, that is updated on
50 * each call of exec_op(). Index 0 is preset at boot with a basic
51 * read operation, so let's use the last entry (31).
55 /* Registers used by the driver */
56 #define FSPI_MCR0 0x00
57 #define FSPI_MCR0_AHB_TIMEOUT(x) ((x) << 24)
58 #define FSPI_MCR0_IP_TIMEOUT(x) ((x) << 16)
59 #define FSPI_MCR0_LEARN_EN BIT(15)
60 #define FSPI_MCR0_SCRFRUN_EN BIT(14)
61 #define FSPI_MCR0_OCTCOMB_EN BIT(13)
62 #define FSPI_MCR0_DOZE_EN BIT(12)
63 #define FSPI_MCR0_HSEN BIT(11)
64 #define FSPI_MCR0_SERCLKDIV BIT(8)
65 #define FSPI_MCR0_ATDF_EN BIT(7)
66 #define FSPI_MCR0_ARDF_EN BIT(6)
67 #define FSPI_MCR0_RXCLKSRC(x) ((x) << 4)
68 #define FSPI_MCR0_END_CFG(x) ((x) << 2)
69 #define FSPI_MCR0_MDIS BIT(1)
70 #define FSPI_MCR0_SWRST BIT(0)
72 #define FSPI_MCR1 0x04
73 #define FSPI_MCR1_SEQ_TIMEOUT(x) ((x) << 16)
74 #define FSPI_MCR1_AHB_TIMEOUT(x) (x)
76 #define FSPI_MCR2 0x08
77 #define FSPI_MCR2_IDLE_WAIT(x) ((x) << 24)
78 #define FSPI_MCR2_SAMEDEVICEEN BIT(15)
79 #define FSPI_MCR2_CLRLRPHS BIT(14)
80 #define FSPI_MCR2_ABRDATSZ BIT(8)
81 #define FSPI_MCR2_ABRLEARN BIT(7)
82 #define FSPI_MCR2_ABR_READ BIT(6)
83 #define FSPI_MCR2_ABRWRITE BIT(5)
84 #define FSPI_MCR2_ABRDUMMY BIT(4)
85 #define FSPI_MCR2_ABR_MODE BIT(3)
86 #define FSPI_MCR2_ABRCADDR BIT(2)
87 #define FSPI_MCR2_ABRRADDR BIT(1)
88 #define FSPI_MCR2_ABR_CMD BIT(0)
90 #define FSPI_AHBCR 0x0c
91 #define FSPI_AHBCR_RDADDROPT BIT(6)
92 #define FSPI_AHBCR_PREF_EN BIT(5)
93 #define FSPI_AHBCR_BUFF_EN BIT(4)
94 #define FSPI_AHBCR_CACH_EN BIT(3)
95 #define FSPI_AHBCR_CLRTXBUF BIT(2)
96 #define FSPI_AHBCR_CLRRXBUF BIT(1)
97 #define FSPI_AHBCR_PAR_EN BIT(0)
99 #define FSPI_INTEN 0x10
100 #define FSPI_INTEN_SCLKSBWR BIT(9)
101 #define FSPI_INTEN_SCLKSBRD BIT(8)
102 #define FSPI_INTEN_DATALRNFL BIT(7)
103 #define FSPI_INTEN_IPTXWE BIT(6)
104 #define FSPI_INTEN_IPRXWA BIT(5)
105 #define FSPI_INTEN_AHBCMDERR BIT(4)
106 #define FSPI_INTEN_IPCMDERR BIT(3)
107 #define FSPI_INTEN_AHBCMDGE BIT(2)
108 #define FSPI_INTEN_IPCMDGE BIT(1)
109 #define FSPI_INTEN_IPCMDDONE BIT(0)
111 #define FSPI_INTR 0x14
112 #define FSPI_INTR_SCLKSBWR BIT(9)
113 #define FSPI_INTR_SCLKSBRD BIT(8)
114 #define FSPI_INTR_DATALRNFL BIT(7)
115 #define FSPI_INTR_IPTXWE BIT(6)
116 #define FSPI_INTR_IPRXWA BIT(5)
117 #define FSPI_INTR_AHBCMDERR BIT(4)
118 #define FSPI_INTR_IPCMDERR BIT(3)
119 #define FSPI_INTR_AHBCMDGE BIT(2)
120 #define FSPI_INTR_IPCMDGE BIT(1)
121 #define FSPI_INTR_IPCMDDONE BIT(0)
123 #define FSPI_LUTKEY 0x18
124 #define FSPI_LUTKEY_VALUE 0x5AF05AF0
126 #define FSPI_LCKCR 0x1C
128 #define FSPI_LCKER_LOCK 0x1
129 #define FSPI_LCKER_UNLOCK 0x2
131 #define FSPI_BUFXCR_INVALID_MSTRID 0xE
132 #define FSPI_AHBRX_BUF0CR0 0x20
133 #define FSPI_AHBRX_BUF1CR0 0x24
134 #define FSPI_AHBRX_BUF2CR0 0x28
135 #define FSPI_AHBRX_BUF3CR0 0x2C
136 #define FSPI_AHBRX_BUF4CR0 0x30
137 #define FSPI_AHBRX_BUF5CR0 0x34
138 #define FSPI_AHBRX_BUF6CR0 0x38
139 #define FSPI_AHBRX_BUF7CR0 0x3C
140 #define FSPI_AHBRXBUF0CR7_PREF BIT(31)
142 #define FSPI_AHBRX_BUF0CR1 0x40
143 #define FSPI_AHBRX_BUF1CR1 0x44
144 #define FSPI_AHBRX_BUF2CR1 0x48
145 #define FSPI_AHBRX_BUF3CR1 0x4C
146 #define FSPI_AHBRX_BUF4CR1 0x50
147 #define FSPI_AHBRX_BUF5CR1 0x54
148 #define FSPI_AHBRX_BUF6CR1 0x58
149 #define FSPI_AHBRX_BUF7CR1 0x5C
151 #define FSPI_FLSHA1CR0 0x60
152 #define FSPI_FLSHA2CR0 0x64
153 #define FSPI_FLSHB1CR0 0x68
154 #define FSPI_FLSHB2CR0 0x6C
155 #define FSPI_FLSHXCR0_SZ_KB 10
156 #define FSPI_FLSHXCR0_SZ(x) ((x) >> FSPI_FLSHXCR0_SZ_KB)
158 #define FSPI_FLSHA1CR1 0x70
159 #define FSPI_FLSHA2CR1 0x74
160 #define FSPI_FLSHB1CR1 0x78
161 #define FSPI_FLSHB2CR1 0x7C
162 #define FSPI_FLSHXCR1_CSINTR(x) ((x) << 16)
163 #define FSPI_FLSHXCR1_CAS(x) ((x) << 11)
164 #define FSPI_FLSHXCR1_WA BIT(10)
165 #define FSPI_FLSHXCR1_TCSH(x) ((x) << 5)
166 #define FSPI_FLSHXCR1_TCSS(x) (x)
168 #define FSPI_FLSHA1CR2 0x80
169 #define FSPI_FLSHA2CR2 0x84
170 #define FSPI_FLSHB1CR2 0x88
171 #define FSPI_FLSHB2CR2 0x8C
172 #define FSPI_FLSHXCR2_CLRINSP BIT(24)
173 #define FSPI_FLSHXCR2_AWRWAIT BIT(16)
174 #define FSPI_FLSHXCR2_AWRSEQN_SHIFT 13
175 #define FSPI_FLSHXCR2_AWRSEQI_SHIFT 8
176 #define FSPI_FLSHXCR2_ARDSEQN_SHIFT 5
177 #define FSPI_FLSHXCR2_ARDSEQI_SHIFT 0
179 #define FSPI_IPCR0 0xA0
181 #define FSPI_IPCR1 0xA4
182 #define FSPI_IPCR1_IPAREN BIT(31)
183 #define FSPI_IPCR1_SEQNUM_SHIFT 24
184 #define FSPI_IPCR1_SEQID_SHIFT 16
185 #define FSPI_IPCR1_IDATSZ(x) (x)
187 #define FSPI_IPCMD 0xB0
188 #define FSPI_IPCMD_TRG BIT(0)
190 #define FSPI_DLPR 0xB4
192 #define FSPI_IPRXFCR 0xB8
193 #define FSPI_IPRXFCR_CLR BIT(0)
194 #define FSPI_IPRXFCR_DMA_EN BIT(1)
195 #define FSPI_IPRXFCR_WMRK(x) ((x) << 2)
197 #define FSPI_IPTXFCR 0xBC
198 #define FSPI_IPTXFCR_CLR BIT(0)
199 #define FSPI_IPTXFCR_DMA_EN BIT(1)
200 #define FSPI_IPTXFCR_WMRK(x) ((x) << 2)
202 #define FSPI_DLLACR 0xC0
203 #define FSPI_DLLACR_OVRDEN BIT(8)
205 #define FSPI_DLLBCR 0xC4
206 #define FSPI_DLLBCR_OVRDEN BIT(8)
208 #define FSPI_STS0 0xE0
209 #define FSPI_STS0_DLPHB(x) ((x) << 8)
210 #define FSPI_STS0_DLPHA(x) ((x) << 4)
211 #define FSPI_STS0_CMD_SRC(x) ((x) << 2)
212 #define FSPI_STS0_ARB_IDLE BIT(1)
213 #define FSPI_STS0_SEQ_IDLE BIT(0)
215 #define FSPI_STS1 0xE4
216 #define FSPI_STS1_IP_ERRCD(x) ((x) << 24)
217 #define FSPI_STS1_IP_ERRID(x) ((x) << 16)
218 #define FSPI_STS1_AHB_ERRCD(x) ((x) << 8)
219 #define FSPI_STS1_AHB_ERRID(x) (x)
221 #define FSPI_AHBSPNST 0xEC
222 #define FSPI_AHBSPNST_DATLFT(x) ((x) << 16)
223 #define FSPI_AHBSPNST_BUFID(x) ((x) << 1)
224 #define FSPI_AHBSPNST_ACTIVE BIT(0)
226 #define FSPI_IPRXFSTS 0xF0
227 #define FSPI_IPRXFSTS_RDCNTR(x) ((x) << 16)
228 #define FSPI_IPRXFSTS_FILL(x) (x)
230 #define FSPI_IPTXFSTS 0xF4
231 #define FSPI_IPTXFSTS_WRCNTR(x) ((x) << 16)
232 #define FSPI_IPTXFSTS_FILL(x) (x)
234 #define FSPI_RFDR 0x100
235 #define FSPI_TFDR 0x180
237 #define FSPI_LUT_BASE 0x200
238 #define FSPI_LUT_OFFSET (SEQID_LUT * 4 * 4)
239 #define FSPI_LUT_REG(idx) \
240 (FSPI_LUT_BASE + FSPI_LUT_OFFSET + (idx) * 4)
242 /* register map end */
244 /* Instruction set for the LUT register. */
245 #define LUT_STOP 0x00
247 #define LUT_ADDR 0x02
248 #define LUT_CADDR_SDR 0x03
249 #define LUT_MODE 0x04
250 #define LUT_MODE2 0x05
251 #define LUT_MODE4 0x06
252 #define LUT_MODE8 0x07
253 #define LUT_NXP_WRITE 0x08
254 #define LUT_NXP_READ 0x09
255 #define LUT_LEARN_SDR 0x0A
256 #define LUT_DATSZ_SDR 0x0B
257 #define LUT_DUMMY 0x0C
258 #define LUT_DUMMY_RWDS_SDR 0x0D
259 #define LUT_JMP_ON_CS 0x1F
260 #define LUT_CMD_DDR 0x21
261 #define LUT_ADDR_DDR 0x22
262 #define LUT_CADDR_DDR 0x23
263 #define LUT_MODE_DDR 0x24
264 #define LUT_MODE2_DDR 0x25
265 #define LUT_MODE4_DDR 0x26
266 #define LUT_MODE8_DDR 0x27
267 #define LUT_WRITE_DDR 0x28
268 #define LUT_READ_DDR 0x29
269 #define LUT_LEARN_DDR 0x2A
270 #define LUT_DATSZ_DDR 0x2B
271 #define LUT_DUMMY_DDR 0x2C
272 #define LUT_DUMMY_RWDS_DDR 0x2D
275 * Calculate number of required PAD bits for LUT register.
277 * The pad stands for the number of IO lines [0:7].
278 * For example, the octal read needs eight IO lines,
279 * so you should use LUT_PAD(8). This macro
280 * returns 3 i.e. use eight (2^3) IP lines for read.
282 #define LUT_PAD(x) (fls(x) - 1)
285 * Macro for constructing the LUT entries with the following
288 * ---------------------------------------------------
289 * | INSTR1 | PAD1 | OPRND1 | INSTR0 | PAD0 | OPRND0 |
290 * ---------------------------------------------------
293 #define INSTR_SHIFT 10
294 #define OPRND_SHIFT 16
296 /* Macros for constructing the LUT register. */
297 #define LUT_DEF(idx, ins, pad, opr) \
298 ((((ins) << INSTR_SHIFT) | ((pad) << PAD_SHIFT) | \
299 (opr)) << (((idx) % 2) * OPRND_SHIFT))
301 #define POLL_TOUT 5000
302 #define NXP_FSPI_MAX_CHIPSELECT 4
304 struct nxp_fspi_devtype_data {
307 unsigned int ahb_buf_size;
312 static const struct nxp_fspi_devtype_data lx2160a_data = {
313 .rxfifo = SZ_512, /* (64 * 64 bits) */
314 .txfifo = SZ_1K, /* (128 * 64 bits) */
315 .ahb_buf_size = SZ_2K, /* (256 * 64 bits) */
317 .little_endian = true, /* little-endian */
322 void __iomem *iobase;
323 void __iomem *ahb_addr;
326 struct clk clk, clk_en;
327 const struct nxp_fspi_devtype_data *devtype_data;
331 * R/W functions for big- or little-endian registers:
332 * The FSPI controller's endianness is independent of
333 * the CPU core's endianness. So far, although the CPU
334 * core is little-endian the FSPI controller can use
335 * big-endian or little-endian.
337 static void fspi_writel(struct nxp_fspi *f, u32 val, void __iomem *addr)
339 if (f->devtype_data->little_endian)
345 static u32 fspi_readl(struct nxp_fspi *f, void __iomem *addr)
347 if (f->devtype_data->little_endian)
348 return in_le32(addr);
350 return in_be32(addr);
353 static int nxp_fspi_check_buswidth(struct nxp_fspi *f, u8 width)
366 static bool nxp_fspi_supports_op(struct spi_slave *slave,
367 const struct spi_mem_op *op)
373 bus = slave->dev->parent;
374 f = dev_get_priv(bus);
376 ret = nxp_fspi_check_buswidth(f, op->cmd.buswidth);
379 ret |= nxp_fspi_check_buswidth(f, op->addr.buswidth);
381 if (op->dummy.nbytes)
382 ret |= nxp_fspi_check_buswidth(f, op->dummy.buswidth);
385 ret |= nxp_fspi_check_buswidth(f, op->data.buswidth);
391 * The number of address bytes should be equal to or less than 4 bytes.
393 if (op->addr.nbytes > 4)
397 * If requested address value is greater than controller assigned
398 * memory mapped space, return error as it didn't fit in the range
399 * of assigned address space.
401 if (op->addr.val >= f->memmap_phy_size)
404 /* Max 64 dummy clock cycles supported */
405 if (op->dummy.buswidth &&
406 (op->dummy.nbytes * 8 / op->dummy.buswidth > 64))
409 /* Max data length, check controller limits and alignment */
410 if (op->data.dir == SPI_MEM_DATA_IN &&
411 (op->data.nbytes > f->devtype_data->ahb_buf_size ||
412 (op->data.nbytes > f->devtype_data->rxfifo - 4 &&
413 !IS_ALIGNED(op->data.nbytes, 8))))
416 if (op->data.dir == SPI_MEM_DATA_OUT &&
417 op->data.nbytes > f->devtype_data->txfifo)
423 /* Instead of busy looping invoke readl_poll_timeout functionality. */
424 static int fspi_readl_poll_tout(struct nxp_fspi *f, void __iomem *base,
425 u32 mask, u32 delay_us,
426 u32 timeout_us, bool c)
430 if (!f->devtype_data->little_endian)
431 mask = (u32)cpu_to_be32(mask);
434 return readl_poll_timeout(base, reg, (reg & mask),
437 return readl_poll_timeout(base, reg, !(reg & mask),
442 * If the slave device content being changed by Write/Erase, need to
443 * invalidate the AHB buffer. This can be achieved by doing the reset
444 * of controller after setting MCR0[SWRESET] bit.
446 static inline void nxp_fspi_invalid(struct nxp_fspi *f)
451 reg = fspi_readl(f, f->iobase + FSPI_MCR0);
452 fspi_writel(f, reg | FSPI_MCR0_SWRST, f->iobase + FSPI_MCR0);
454 /* w1c register, wait unit clear */
455 ret = fspi_readl_poll_tout(f, f->iobase + FSPI_MCR0,
456 FSPI_MCR0_SWRST, 0, POLL_TOUT, false);
460 static void nxp_fspi_prepare_lut(struct nxp_fspi *f,
461 const struct spi_mem_op *op)
463 void __iomem *base = f->iobase;
468 lutval[0] |= LUT_DEF(0, LUT_CMD, LUT_PAD(op->cmd.buswidth),
472 if (op->addr.nbytes) {
473 lutval[lutidx / 2] |= LUT_DEF(lutidx, LUT_ADDR,
474 LUT_PAD(op->addr.buswidth),
475 op->addr.nbytes * 8);
479 /* dummy bytes, if needed */
480 if (op->dummy.nbytes) {
481 lutval[lutidx / 2] |= LUT_DEF(lutidx, LUT_DUMMY,
483 * Due to FlexSPI controller limitation number of PAD for dummy
484 * buswidth needs to be programmed as equal to data buswidth.
486 LUT_PAD(op->data.buswidth),
487 op->dummy.nbytes * 8 /
492 /* read/write data bytes */
493 if (op->data.nbytes) {
494 lutval[lutidx / 2] |= LUT_DEF(lutidx,
495 op->data.dir == SPI_MEM_DATA_IN ?
496 LUT_NXP_READ : LUT_NXP_WRITE,
497 LUT_PAD(op->data.buswidth),
502 /* stop condition. */
503 lutval[lutidx / 2] |= LUT_DEF(lutidx, LUT_STOP, 0, 0);
506 fspi_writel(f, FSPI_LUTKEY_VALUE, f->iobase + FSPI_LUTKEY);
507 fspi_writel(f, FSPI_LCKER_UNLOCK, f->iobase + FSPI_LCKCR);
510 for (i = 0; i < ARRAY_SIZE(lutval); i++)
511 fspi_writel(f, lutval[i], base + FSPI_LUT_REG(i));
513 dev_dbg(f->dev, "CMD[%x] lutval[0:%x \t 1:%x \t 2:%x \t 3:%x]\n",
514 op->cmd.opcode, lutval[0], lutval[1], lutval[2], lutval[3]);
517 fspi_writel(f, FSPI_LUTKEY_VALUE, f->iobase + FSPI_LUTKEY);
518 fspi_writel(f, FSPI_LCKER_LOCK, f->iobase + FSPI_LCKCR);
521 #if CONFIG_IS_ENABLED(CONFIG_CLK)
522 static int nxp_fspi_clk_prep_enable(struct nxp_fspi *f)
526 ret = clk_enable(&f->clk_en);
530 ret = clk_enable(&f->clk);
532 clk_disable(&f->clk_en);
539 static void nxp_fspi_clk_disable_unprep(struct nxp_fspi *f)
541 clk_disable(&f->clk);
542 clk_disable(&f->clk_en);
547 * In FlexSPI controller, flash access is based on value of FSPI_FLSHXXCR0
548 * register and start base address of the slave device.
551 * -------- <-- FLSHB2CR0
554 * B2 start address --> -------- <-- FLSHB1CR0
557 * B1 start address --> -------- <-- FLSHA2CR0
560 * A2 start address --> -------- <-- FLSHA1CR0
563 * A1 start address --> -------- (Lower address)
566 * Start base address defines the starting address range for given CS and
567 * FSPI_FLSHXXCR0 defines the size of the slave device connected at given CS.
569 * But, different targets are having different combinations of number of CS,
570 * some targets only have single CS or two CS covering controller's full
571 * memory mapped space area.
572 * Thus, implementation is being done as independent of the size and number
573 * of the connected slave device.
574 * Assign controller memory mapped space size as the size to the connected
576 * Mark FLSHxxCR0 as zero initially and then assign value only to the selected
577 * chip-select Flash configuration register.
579 * For e.g. to access CS2 (B1), FLSHB1CR0 register would be equal to the
580 * memory mapped size of the controller.
581 * Value for rest of the CS FLSHxxCR0 register would be zero.
584 static void nxp_fspi_select_mem(struct nxp_fspi *f, int chip_select)
588 /* Reset FLSHxxCR0 registers */
589 fspi_writel(f, 0, f->iobase + FSPI_FLSHA1CR0);
590 fspi_writel(f, 0, f->iobase + FSPI_FLSHA2CR0);
591 fspi_writel(f, 0, f->iobase + FSPI_FLSHB1CR0);
592 fspi_writel(f, 0, f->iobase + FSPI_FLSHB2CR0);
594 /* Assign controller memory mapped space as size, KBytes, of flash. */
595 size_kb = FSPI_FLSHXCR0_SZ(f->memmap_phy_size);
597 fspi_writel(f, size_kb, f->iobase + FSPI_FLSHA1CR0 +
600 dev_dbg(f->dev, "Slave device [CS:%x] selected\n", chip_select);
603 static void nxp_fspi_read_ahb(struct nxp_fspi *f, const struct spi_mem_op *op)
605 u32 len = op->data.nbytes;
607 /* Read out the data directly from the AHB buffer. */
608 memcpy_fromio(op->data.buf.in, (f->ahb_addr + op->addr.val), len);
611 static void nxp_fspi_fill_txfifo(struct nxp_fspi *f,
612 const struct spi_mem_op *op)
614 void __iomem *base = f->iobase;
616 u8 *buf = (u8 *)op->data.buf.out;
618 /* clear the TX FIFO. */
619 fspi_writel(f, FSPI_IPTXFCR_CLR, base + FSPI_IPTXFCR);
622 * Default value of water mark level is 8 bytes, hence in single
623 * write request controller can write max 8 bytes of data.
626 for (i = 0; i < ALIGN_DOWN(op->data.nbytes, 8); i += 8) {
627 /* Wait for TXFIFO empty */
628 ret = fspi_readl_poll_tout(f, f->iobase + FSPI_INTR,
633 fspi_writel(f, *(u32 *)(buf + i), base + FSPI_TFDR);
634 fspi_writel(f, *(u32 *)(buf + i + 4), base + FSPI_TFDR + 4);
635 fspi_writel(f, FSPI_INTR_IPTXWE, base + FSPI_INTR);
638 if (i < op->data.nbytes) {
641 /* Wait for TXFIFO empty */
642 ret = fspi_readl_poll_tout(f, f->iobase + FSPI_INTR,
647 for (j = 0; j < ALIGN(op->data.nbytes - i, 4); j += 4) {
648 memcpy(&data, buf + i + j, 4);
649 fspi_writel(f, data, base + FSPI_TFDR + j);
651 fspi_writel(f, FSPI_INTR_IPTXWE, base + FSPI_INTR);
655 static void nxp_fspi_read_rxfifo(struct nxp_fspi *f,
656 const struct spi_mem_op *op)
658 void __iomem *base = f->iobase;
660 int len = op->data.nbytes;
661 u8 *buf = (u8 *)op->data.buf.in;
664 * Default value of water mark level is 8 bytes, hence in single
665 * read request controller can read max 8 bytes of data.
667 for (i = 0; i < ALIGN_DOWN(len, 8); i += 8) {
668 /* Wait for RXFIFO available */
669 ret = fspi_readl_poll_tout(f, f->iobase + FSPI_INTR,
674 *(u32 *)(buf + i) = fspi_readl(f, base + FSPI_RFDR);
675 *(u32 *)(buf + i + 4) = fspi_readl(f, base + FSPI_RFDR + 4);
676 /* move the FIFO pointer */
677 fspi_writel(f, FSPI_INTR_IPRXWA, base + FSPI_INTR);
684 buf = op->data.buf.in + i;
685 /* Wait for RXFIFO available */
686 ret = fspi_readl_poll_tout(f, f->iobase + FSPI_INTR,
691 len = op->data.nbytes - i;
692 for (j = 0; j < op->data.nbytes - i; j += 4) {
693 tmp = fspi_readl(f, base + FSPI_RFDR + j);
695 memcpy(buf + j, &tmp, size);
700 /* invalid the RXFIFO */
701 fspi_writel(f, FSPI_IPRXFCR_CLR, base + FSPI_IPRXFCR);
702 /* move the FIFO pointer */
703 fspi_writel(f, FSPI_INTR_IPRXWA, base + FSPI_INTR);
706 static int nxp_fspi_do_op(struct nxp_fspi *f, const struct spi_mem_op *op)
708 void __iomem *base = f->iobase;
713 reg = fspi_readl(f, base + FSPI_IPRXFCR);
714 /* invalid RXFIFO first */
715 reg &= ~FSPI_IPRXFCR_DMA_EN;
716 reg = reg | FSPI_IPRXFCR_CLR;
717 fspi_writel(f, reg, base + FSPI_IPRXFCR);
719 fspi_writel(f, op->addr.val, base + FSPI_IPCR0);
721 * Always start the sequence at the same index since we update
722 * the LUT at each exec_op() call. And also specify the DATA
723 * length, since it's has not been specified in the LUT.
725 fspi_writel(f, op->data.nbytes |
726 (SEQID_LUT << FSPI_IPCR1_SEQID_SHIFT) |
727 (seqnum << FSPI_IPCR1_SEQNUM_SHIFT),
730 /* Trigger the LUT now. */
731 fspi_writel(f, FSPI_IPCMD_TRG, base + FSPI_IPCMD);
733 /* Wait for the completion. */
734 err = fspi_readl_poll_tout(f, f->iobase + FSPI_STS0,
735 FSPI_STS0_ARB_IDLE, 1, 1000 * 1000, true);
737 /* Invoke IP data read, if request is of data read. */
738 if (!err && op->data.nbytes && op->data.dir == SPI_MEM_DATA_IN)
739 nxp_fspi_read_rxfifo(f, op);
744 static int nxp_fspi_exec_op(struct spi_slave *slave,
745 const struct spi_mem_op *op)
751 bus = slave->dev->parent;
752 f = dev_get_priv(bus);
754 /* Wait for controller being ready. */
755 err = fspi_readl_poll_tout(f, f->iobase + FSPI_STS0,
756 FSPI_STS0_ARB_IDLE, 1, POLL_TOUT, true);
759 nxp_fspi_prepare_lut(f, op);
761 * If we have large chunks of data, we read them through the AHB bus
762 * by accessing the mapped memory. In all other cases we use
763 * IP commands to access the flash.
765 if (op->data.nbytes > (f->devtype_data->rxfifo - 4) &&
766 op->data.dir == SPI_MEM_DATA_IN) {
767 nxp_fspi_read_ahb(f, op);
769 if (op->data.nbytes && op->data.dir == SPI_MEM_DATA_OUT)
770 nxp_fspi_fill_txfifo(f, op);
772 err = nxp_fspi_do_op(f, op);
775 /* Invalidate the data in the AHB buffer. */
781 static int nxp_fspi_adjust_op_size(struct spi_slave *slave,
782 struct spi_mem_op *op)
787 bus = slave->dev->parent;
788 f = dev_get_priv(bus);
790 if (op->data.dir == SPI_MEM_DATA_OUT) {
791 if (op->data.nbytes > f->devtype_data->txfifo)
792 op->data.nbytes = f->devtype_data->txfifo;
794 if (op->data.nbytes > f->devtype_data->ahb_buf_size)
795 op->data.nbytes = f->devtype_data->ahb_buf_size;
796 else if (op->data.nbytes > (f->devtype_data->rxfifo - 4))
797 op->data.nbytes = ALIGN_DOWN(op->data.nbytes, 8);
803 static int nxp_fspi_default_setup(struct nxp_fspi *f)
805 void __iomem *base = f->iobase;
809 #if CONFIG_IS_ENABLED(CONFIG_CLK)
810 /* disable and unprepare clock to avoid glitch pass to controller */
811 nxp_fspi_clk_disable_unprep(f);
813 /* the default frequency, we will change it later if necessary. */
814 ret = clk_set_rate(&f->clk, 20000000);
818 ret = nxp_fspi_clk_prep_enable(f);
823 /* Reset the module */
824 /* w1c register, wait unit clear */
825 ret = fspi_readl_poll_tout(f, f->iobase + FSPI_MCR0,
826 FSPI_MCR0_SWRST, 0, POLL_TOUT, false);
829 /* Disable the module */
830 fspi_writel(f, FSPI_MCR0_MDIS, base + FSPI_MCR0);
832 /* Reset the DLL register to default value */
833 fspi_writel(f, FSPI_DLLACR_OVRDEN, base + FSPI_DLLACR);
834 fspi_writel(f, FSPI_DLLBCR_OVRDEN, base + FSPI_DLLBCR);
837 fspi_writel(f, FSPI_MCR0_AHB_TIMEOUT(0xFF) | FSPI_MCR0_IP_TIMEOUT(0xFF),
841 * Disable same device enable bit and configure all slave devices
844 reg = fspi_readl(f, f->iobase + FSPI_MCR2);
845 reg = reg & ~(FSPI_MCR2_SAMEDEVICEEN);
846 fspi_writel(f, reg, base + FSPI_MCR2);
848 /* AHB configuration for access buffer 0~7. */
849 for (i = 0; i < 7; i++)
850 fspi_writel(f, 0, base + FSPI_AHBRX_BUF0CR0 + 4 * i);
853 * Set ADATSZ with the maximum AHB buffer size to improve the read
856 fspi_writel(f, (f->devtype_data->ahb_buf_size / 8 |
857 FSPI_AHBRXBUF0CR7_PREF), base + FSPI_AHBRX_BUF7CR0);
859 /* prefetch and no start address alignment limitation */
860 fspi_writel(f, FSPI_AHBCR_PREF_EN | FSPI_AHBCR_RDADDROPT,
863 /* AHB Read - Set lut sequence ID for all CS. */
864 fspi_writel(f, SEQID_LUT, base + FSPI_FLSHA1CR2);
865 fspi_writel(f, SEQID_LUT, base + FSPI_FLSHA2CR2);
866 fspi_writel(f, SEQID_LUT, base + FSPI_FLSHB1CR2);
867 fspi_writel(f, SEQID_LUT, base + FSPI_FLSHB2CR2);
872 static int nxp_fspi_probe(struct udevice *bus)
874 struct nxp_fspi *f = dev_get_priv(bus);
877 (struct nxp_fspi_devtype_data *)dev_get_driver_data(bus);
878 nxp_fspi_default_setup(f);
883 static int nxp_fspi_claim_bus(struct udevice *dev)
887 struct dm_spi_slave_platdata *slave_plat = dev_get_parent_platdata(dev);
890 f = dev_get_priv(bus);
892 nxp_fspi_select_mem(f, slave_plat->cs);
897 static int nxp_fspi_set_speed(struct udevice *bus, uint speed)
899 #if CONFIG_IS_ENABLED(CONFIG_CLK)
900 struct nxp_fspi *f = dev_get_priv(bus);
903 nxp_fspi_clk_disable_unprep(f);
905 ret = clk_set_rate(&f->clk, speed);
909 ret = nxp_fspi_clk_prep_enable(f);
916 static int nxp_fspi_set_mode(struct udevice *bus, uint mode)
922 static int nxp_fspi_ofdata_to_platdata(struct udevice *bus)
924 struct nxp_fspi *f = dev_get_priv(bus);
925 #if CONFIG_IS_ENABLED(CONFIG_CLK)
930 fdt_addr_t iobase_size;
936 iobase = devfdt_get_addr_size_name(bus, "fspi_base", &iobase_size);
937 if (iobase == FDT_ADDR_T_NONE) {
938 dev_err(bus, "fspi_base regs missing\n");
941 f->iobase = map_physmem(iobase, iobase_size, MAP_NOCACHE);
943 ahb_addr = devfdt_get_addr_size_name(bus, "fspi_mmap", &ahb_size);
944 if (ahb_addr == FDT_ADDR_T_NONE) {
945 dev_err(bus, "fspi_mmap regs missing\n");
948 f->ahb_addr = map_physmem(ahb_addr, ahb_size, MAP_NOCACHE);
949 f->memmap_phy_size = ahb_size;
951 #if CONFIG_IS_ENABLED(CONFIG_CLK)
952 ret = clk_get_by_name(bus, "fspi_en", &f->clk_en);
954 dev_err(bus, "failed to get fspi_en clock\n");
958 ret = clk_get_by_name(bus, "fspi", &f->clk);
960 dev_err(bus, "failed to get fspi clock\n");
965 dev_dbg(bus, "iobase=<0x%llx>, ahb_addr=<0x%llx>\n", iobase, ahb_addr);
970 static const struct spi_controller_mem_ops nxp_fspi_mem_ops = {
971 .adjust_op_size = nxp_fspi_adjust_op_size,
972 .supports_op = nxp_fspi_supports_op,
973 .exec_op = nxp_fspi_exec_op,
976 static const struct dm_spi_ops nxp_fspi_ops = {
977 .claim_bus = nxp_fspi_claim_bus,
978 .set_speed = nxp_fspi_set_speed,
979 .set_mode = nxp_fspi_set_mode,
980 .mem_ops = &nxp_fspi_mem_ops,
983 static const struct udevice_id nxp_fspi_ids[] = {
984 { .compatible = "nxp,lx2160a-fspi", .data = (ulong)&lx2160a_data, },
988 U_BOOT_DRIVER(nxp_fspi) = {
991 .of_match = nxp_fspi_ids,
992 .ops = &nxp_fspi_ops,
993 .ofdata_to_platdata = nxp_fspi_ofdata_to_platdata,
994 .priv_auto_alloc_size = sizeof(struct nxp_fspi),
995 .probe = nxp_fspi_probe,